General Information of This Antibody-drug Conjugate (ID: DRG0CRYVT)
ADC Name
Trastuzumab envedotin
Synonyms
trastuzumab envedotin; DP303c; SYA1501; SYSA1501
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Organization
CSPC Pharmaceutical Group (Originator)
Drug Status
Phase 3
Drug-to-Antibody Ratio
2
Structure
Antibody Name
Trastuzumab
 Antibody Info 
Antigen Name
Receptor tyrosine-protein kinase erbB-2 (HER2)
 Antigen Info 
Payload Name
Monomethyl auristatin E
 Payload Info 
Payload Target
Microtubule (MT)
 Target Info 
Linker Name
NH2-PEG3-Val-Cit-PABC
 Linker Info 
Conjugate Type
Enzymatic Catalysis
Combination Type
envedotin
2027 Update
The disease landscape of This ADC
2027 Update
The clinical trial pipelines of This ADC
Indication Phase 1 Phase 2 Phase 3 Approved
Unspecific solid tumor
2 Trials
Trial ID
NCT05810103; CTR20230784
NCT04146610; CTR20191791
Gastric cancer
1 Trials
Trial ID
NCT04826107; CTR20210829
Peritoneal cancer
1 Trials
Trial ID
NCT04828616; CTR20210512
Breast cancer
1 Trials
Trial ID
NCT05334810; CTR20220664
2 Trials
Trial ID
NCT06313086; CTR20240245
NCT05901935; CTR20231487
Ovarian cancer
1 Trials
Trial ID
NCT04828616; CTR20210512
Fallopian tube cancer
1 Trials
Trial ID
NCT04828616; CTR20210512
2027 Update
General Information of The ADMET Data Related to This ADC
Absorption
Click To Hide/Show 20 Absorption Data Related to This Level
Standard Type Value Units Description Reference
Maximum Observed Concentration (Cmax) 23.6 ng/mL
Pharmacokinetic parameters for DP303c, Dose escalation 1.0 mg/kg, n=3.
[1]
Maximum Observed Concentration (Cmax) 46.7 ng/mL
Pharmacokinetic parameters for DP303c, Dose escalation 2.0 mg/kg, n=6.
[1]
Maximum Observed Concentration (Cmax) 78.7 ng/mL
Pharmacokinetic parameters for DP303c, Dose escalation 3.0 mg/kg, n=6.
[1]
Maximum Observed Concentration (Cmax) 110 ng/mL
Pharmacokinetic parameters for DP303c, Dose escalation 4.0 mg/kg, n=6.
[1]
Maximum Observed Concentration (Cmax) 73 ng/mL
Pharmacokinetic parameters for DP303c, Dose expansion 3.0 mg/kg, n=72.
[1]
Area Under the Concentration-Time Curve (AUC) 1330 ng·h/mL
Pharmacokinetic parameters for DP303c, Dose escalation 1.0 mg/kg, n=3, AUC0-t.
[1]
Area Under the Concentration-Time Curve (AUC) 4130 ng·h/mL
Pharmacokinetic parameters for DP303c, Dose escalation 2.0 mg/kg, n=6, AUC0-t.
[1]
Area Under the Concentration-Time Curve (AUC) 6550 ng·h/mL
Pharmacokinetic parameters for DP303c, Dose escalation 3.0 mg/kg, n=6, AUC0-t.
[1]
Area Under the Concentration-Time Curve (AUC) 11300 ng·h/mL
Pharmacokinetic parameters for DP303c, Dose escalation 4.0 mg/kg, n=6, AUC0-t.
[1]
Area Under the Concentration-Time Curve (AUC) 5940 ng·h/mL
Pharmacokinetic parameters for DP303c, Dose expansion 3.0 mg/kg, n=72, AUC0-t.
[1]
Area Under the Concentration-Time Curve (AUC) 1430 ng·h/mL
Pharmacokinetic parameters for DP303c, Dose escalation 1.0 mg/kg, n=3, AUC0-inf.
[1]
Area Under the Concentration-Time Curve (AUC) 4240 ng·h/mL
Pharmacokinetic parameters for DP303c, Dose escalation 2.0 mg/kg, n=6, AUC0-inf.
[1]
Area Under the Concentration-Time Curve (AUC) 6800 ng·h/mL
Pharmacokinetic parameters for DP303c, Dose escalation 3.0 mg/kg, n=6, AUC0-inf.
[1]
Area Under the Concentration-Time Curve (AUC) 11900 ng·h/mL
Pharmacokinetic parameters for DP303c, Dose escalation 4.0 mg/kg, n=6, AUC0-inf.
[1]
Area Under the Concentration-Time Curve (AUC) 6350 ng·h/mL
Pharmacokinetic parameters for DP303c, Dose expansion 3.0 mg/kg, n=72, AUC0-inf.
[1]
Time to Maximum Concentration (Tmax) 1.98 h
Pharmacokinetic parameters for DP303c, Dose escalation 1.0 mg/kg, n=3.
[1]
Time to Maximum Concentration (Tmax) 2.08 h
Pharmacokinetic parameters for DP303c, Dose escalation 2.0 mg/kg, n=6.
[1]
Time to Maximum Concentration (Tmax) 2.03 h
Pharmacokinetic parameters for DP303c, Dose escalation 3.0 mg/kg, n=6.
[1]
Time to Maximum Concentration (Tmax) 1.9 h
Pharmacokinetic parameters for DP303c, Dose escalation 4.0 mg/kg, n=6.
[1]
Time to Maximum Concentration (Tmax) 1.97 h
Pharmacokinetic parameters for DP303c, Dose expansion 3.0 mg/kg, n=72.
[1]
Distribution
Click To Hide/Show 5 Distribution Data Related to This Level
Standard Type Value Units Description Reference
Volume of Distribution (Vd) 2.54 L
Pharmacokinetic parameters for DP303c, Dose escalation 1.0 mg/kg, n=3.
[1]
Volume of Distribution (Vd) 3.29 L
Pharmacokinetic parameters for DP303c, Dose escalation 2.0 mg/kg, n=6.
[1]
Volume of Distribution (Vd) 2.62 L
Pharmacokinetic parameters for DP303c, Dose escalation 3.0 mg/kg, n=6.
[1]
Volume of Distribution (Vd) 2.86 L
Pharmacokinetic parameters for DP303c, Dose escalation 4.0 mg/kg, n=6.
[1]
Volume of Distribution (Vd) 3.17 L
Pharmacokinetic parameters for DP303c, Dose expansion 3.0 mg/kg, n=72.
[1]
Excretion
Click To Hide/Show 10 Excretion Data Related to This Level
Standard Type Value Units Description Reference
Elimination Half-Life (t1/2) 1.8 h
Pharmacokinetic parameters for DP303c, Dose escalation 1.0 mg/kg, n=3.
[1]
Elimination Half-Life (t1/2) 2.71 h
Pharmacokinetic parameters for DP303c, Dose escalation 2.0 mg/kg, n=6.
[1]
Elimination Half-Life (t1/2) 2.69 h
Pharmacokinetic parameters for DP303c, Dose escalation 3.0 mg/kg, n=6.
[1]
Elimination Half-Life (t1/2) 3.69 h
Pharmacokinetic parameters for DP303c, Dose escalation 4.0 mg/kg, n=6.
[1]
Elimination Half-Life (t1/2) 2.98 h
Pharmacokinetic parameters for DP303c, Dose expansion 3.0 mg/kg, n=72.
[1]
Clearance (CL) 0.0408 L/h
Pharmacokinetic parameters for DP303c, Dose escalation 1.0 mg/kg, n=3.
[1]
Clearance (CL) 0.0361 L/h
Pharmacokinetic parameters for DP303c, Dose escalation 2.0 mg/kg, n=6.
[1]
Clearance (CL) 0.0345 L/h
Pharmacokinetic parameters for DP303c, Dose escalation 3.0 mg/kg, n=6.
[1]
Clearance (CL) 0.0224 L/h
Pharmacokinetic parameters for DP303c, Dose escalation 4.0 mg/kg, n=6.
[1]
Clearance (CL) 0.0321 L/h
Pharmacokinetic parameters for DP303c, Dose expansion 3.0 mg/kg, n=72.
[1]
General Information of The Activity Data Related to This ADC
Identified from the Human Clinical Data
Click To Hide/Show 14 Activity Data Related to This Level
Standard Type NCT Number Clinical Status Clinical Trial Description
Tumor-associated calcium signal transducer 2 (TACSTD2)  NCT05810103
PHASE1
A Multi-center, Single-arm, Phase I Study of DP303c in Patients With HER2-positive Advanced Solid Tumors
Progression Free Survival  NCT04146610
PHASE1
A Phase Ia, Multicenter, Open and Dose-increasing Study of DP303c to Evaluate the Safety , Pharmacokinetics, Immunogenicity and Antitumor Activity of Subjects With HER2-Positive Advanced Solid Tumors
Objective Response Rate (ORR)  NCT04146610
PHASE1
A Phase Ia, Multicenter, Open and Dose-increasing Study of DP303c to Evaluate the Safety , Pharmacokinetics, Immunogenicity and Antitumor Activity of Subjects With HER2-Positive Advanced Solid Tumors
Disease control rate (DCR)  NCT04146610
PHASE1
A Phase Ia, Multicenter, Open and Dose-increasing Study of DP303c to Evaluate the Safety , Pharmacokinetics, Immunogenicity and Antitumor Activity of Subjects With HER2-Positive Advanced Solid Tumors
Undisclosed  NCT05334810
PHASE2
A Multi-center, Open-lable, Single-arm Phase II Study to Evaluate the Efficacy and Safety of DP303c in Patients With HER2-positive Unresectable Locally Advanced, Relapsed, or Metastatic Breast Cancer
Undisclosed  NCT05901935
PHASE3
A Multicentre, Randomized, Open-label, Controlled Phase III Clinical Study to Evaluate the Efficacy and Safety of DP303cversus Trastuzumab Combined With Vinorelbine/Capecitabine in of HER2-positive Advanced Breast Cancer

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Undisclosed  NCT06313086
PHASE3
A Multicentre, Randomized, Open-label, Controlled Phase III Clinical Study to Evaluate the Efficacy and Safety of DP303c Versus Trastuzumab Emtansine in Patients With HER2-positive Advanced Breast Cancer

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Undisclosed  NCT06577376
PHASE1|||PHASE2
A Multicenter, Open-label Phase I/II Clinical Study to Evaluate the Safety and Efficacy of Simmitinib or Irinotecan Liposomes Combined With DP303c Injection in the Treatment of HER2 Expressing Gastric Adenocarcinoma or Gastroesophageal Junction Adenocarcinoma

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Undisclosed  NCT04826107
PHASE2
An Open-label, Multicentre, Phase II Study of DP303c Injection in Patients With Unresectable Locally Advanced, Recurrent or Metastatic Gastric Cancer With HER2 Expression
Undisclosed  NCT04828616
PHASE2
An Open-label, Multicentre, Phase II Study of DP303c Injection in Patients With HER2-expressing Advanced Ovarian Cancer
Undisclosed  NCT04826107
Phase 2
An open-label, multicentre, phase 2 study of DP303c injection in patients with unresectable locally advanced, recurrent or metastatic gastric cancer with HER2 expression.
Undisclosed  NCT04828616
Phase 2
An open-label, multicentre, phase 2 study of DP303c injection in patients with HER2-expressing advanced ovarian cancer.
Undisclosed  NCT05334810
Phase 2
A multi-center, open-lable, single-arm phase 2 study to evaluate the efficacy and safety of DP303c in patients with HER2-positive unresectable locally advanced, relapsed, or metastatic breast cancer.
Undisclosed  NCT04146610
Phase 1
A phase 1a, multicenter, open and dose-increasing study of DP303c to evaluate the safety , pharmacokinetics, immunogenicity and antitumor activity of subjects with HER2-positive advanced solid tumors.
Discovered Using Cell Line-derived Xenograft Model
Click To Hide/Show 34 Activity Data Related to This Level
Standard Type Value Units Cell Line Disease Model
Tumor Growth Inhibition value (TGI) 
≈ 7.6
%
JIMT-1 cells
Breast ductal carcinoma
Tumor Growth Inhibition value (TGI) 
≈ 16.2
%
JIMT-1 cells
Breast ductal carcinoma
Tumor Growth Inhibition value (TGI) 
≈ 28.47
%
SK-OV-3 cells
Ovarian serous cystadenocarcinoma
Tumor Growth Inhibition value (TGI) 
≈ 33.6
%
NCI-N87 cells
Gastric tubular adenocarcinoma
Tumor Growth Inhibition value (TGI) 
≈ 39
%
JIMT-1 cells
Breast ductal carcinoma
Tumor Growth Inhibition value (TGI) 
≈ 45.26
%
SK-OV-3 cells
Ovarian serous cystadenocarcinoma
Tumor Growth Inhibition value (TGI) 
≈ 54.4
%
JIMT-1 cells
Breast ductal carcinoma
Tumor Growth Inhibition value (TGI) 
≈ 82.1
%
SK-BR-3 cells
Breast adenocarcinoma
Tumor Growth Inhibition value (TGI) 
≈ 83.94
%
SK-OV-3 cells
Ovarian serous cystadenocarcinoma
Tumor Growth Inhibition value (TGI) 
≈ 90.48
%
HCC1954 cells
Breast ductal carcinoma
Tumor Growth Inhibition value (TGI) 
≈ 91.6
%
NCI-N87 cells
Gastric tubular adenocarcinoma
Tumor Growth Inhibition value (TGI) 
≈ 94
%
NCI-N87 cells
Gastric tubular adenocarcinoma
Tumor Growth Inhibition value (TGI) 
≈ 94
%
NCI-N87 cells
Gastric tubular adenocarcinoma
Tumor Growth Inhibition value (TGI) 
≈ 94
%
NCI-N87 cells
Gastric tubular adenocarcinoma
Tumor Growth Inhibition value (TGI) 
≈ 94.1
%
SK-BR-3 cells
Breast adenocarcinoma
Tumor Growth Inhibition value (TGI) 
≈ 94.16
%
SK-OV-3 cells
Ovarian serous cystadenocarcinoma
Tumor Growth Inhibition value (TGI) 
≈ 94.3
%
HCC1954 cells
Breast ductal carcinoma
Tumor Growth Inhibition value (TGI) 
≈ 97
%
HCC1954 cells
Breast ductal carcinoma
Tumor Growth Inhibition value (TGI) 
≈ 97
%
HCC1954 cells
Breast ductal carcinoma
Tumor Growth Inhibition value (TGI) 
≈ 97
%
HCC1954 cells
Breast ductal carcinoma
Tumor Growth Inhibition value (TGI) 
≈ 97.1
%
HCC1954 cells
Breast ductal carcinoma
Tumor Growth Inhibition value (TGI) 
≈ 97.5
%
HCC1954 cells
Breast ductal carcinoma
Tumor Growth Inhibition value (TGI) 
≈ 97.5
%
NCI-N87 cells
Gastric tubular adenocarcinoma
Tumor Growth Inhibition value (TGI) 
≈ 97.8
%
JIMT-1 cells
Breast ductal carcinoma
Tumor Growth Inhibition value (TGI) 
≈ 97.8
%
SK-BR-3 cells
Breast adenocarcinoma
Tumor Growth Inhibition value (TGI) 
≈ 97.8
%
NCI-N87 cells
Gastric tubular adenocarcinoma
Tumor Growth Inhibition value (TGI) 
≈ 98.5
%
NCI-N87 cells
Gastric tubular adenocarcinoma
Tumor Growth Inhibition value (TGI) 
≈ 98.54
%
SK-OV-3 cells
Ovarian serous cystadenocarcinoma
Tumor Growth Inhibition value (TGI) 
≈ 98.8
%
JIMT-1 cells
Breast ductal carcinoma
Tumor Growth Inhibition value (TGI) 
≈ 99.1
%
HCC1954 cells
Breast ductal carcinoma
Tumor Growth Inhibition value (TGI) 
≈ 99.9
%
JIMT-1 cells
Breast ductal carcinoma
Tumor Growth Inhibition value (TGI) 
≈ 100
%
JIMT-1 cells
Breast ductal carcinoma
Tumor Growth Inhibition value (TGI) 
≈ 100
%
JIMT-1 cells
Breast ductal carcinoma
Tumor Growth Inhibition value (TGI) 
≈ 100
%
JIMT-1 cells
Breast ductal carcinoma
Revealed Based on the Cell Line Data
Click To Hide/Show 14 Activity Data Related to This Level
Standard Type Value Units Cell Line Disease Model
Half Maximal Inhibitory Concentration (IC50) 
0.07
nM
SK-BR-3 cells
Breast adenocarcinoma
Half Maximal Inhibitory Concentration (IC50) 
0.07
nM
SK-BR-3 cells
Breast adenocarcinoma
Half Maximal Inhibitory Concentration (IC50) 
0.08
nM
BT-474 cells
Invasive breast carcinoma
Half Maximal Inhibitory Concentration (IC50) 
0.08
nM
BT-474 cells
Invasive breast carcinoma
Half Maximal Inhibitory Concentration (IC50) 
0.15
nM
HCC1954 cells
Breast ductal carcinoma
Half Maximal Inhibitory Concentration (IC50) 
0.15
nM
HCC1954 cells
Breast ductal carcinoma
Half Maximal Inhibitory Concentration (IC50) 
0.22
nM
SK-OV-3 cells
Ovarian serous cystadenocarcinoma
Half Maximal Inhibitory Concentration (IC50) 
0.22
nM
SK-OV-3 cells
Ovarian serous cystadenocarcinoma
Half Maximal Inhibitory Concentration (IC50) 
0.23
nM
NCI-N87 cells
Gastric tubular adenocarcinoma
Half Maximal Inhibitory Concentration (IC50) 
0.23
nM
NCI-N87 cells
Gastric tubular adenocarcinoma
Half Maximal Inhibitory Concentration (IC50) 
3.39
nM
JIMT-1 cells
Breast ductal carcinoma
Half Maximal Inhibitory Concentration (IC50) 
3.39
nM
JIMT-1 cells
Breast ductal carcinoma
Half Maximal Inhibitory Concentration (IC50) 
> 50
nM
MDA-MB-468 cells
Breast adenocarcinoma
Half Maximal Inhibitory Concentration (IC50) 
> 1000
nM
MDA-MB-468 cells
Breast adenocarcinoma
Full List of Activity Data of This Antibody-drug Conjugate
Identified from the Human Clinical Data
Click To Hide/Show 14 Activity Data Related to This Level
Experiment 1 Reporting the Activity Date of This ADC [2]
Efficacy Data Tumor-associated calcium signal transducer 2 (TACSTD2) . . .
Patients Enrolled
Eligibility requires age &ge;18 with ECOG 0-1, HER2+ advanced solid tumors, prior anti-HER2 therapy, and adequate organ function. Key exclusions: LVEF<40%, grade &ge;3 neuropathy, active hepatitis/HIV, recent CYP3A modulators (14 days), anthracycline overexposure, or uncontrolled CNS metastases. Contraception mandated for 6 months post-treatment.
Administration Dosage
DP303c injection, 3.0 mg/kg, every 3 weeks.
Related Clinical Trial
NCT Number NCT05810103  Clinical Status PHASE1
Clinical Description A Multi-center, Single-arm, Phase I Study of DP303c in Patients With HER2-positive Advanced Solid Tumors
Primary Endpoint
Primary pharmacokinetic endpoints include Cmax, AUC0-last, AUC0-inf, and Tmax of the investigational drug measured during multiple dosing cycles (21-day cycles) in patients with HER2-positive advanced solid tumors.
Other Endpoint
Secondary endpoints assess safety (AE incidence over 12 months), efficacy (ORR, DCR, DoR over 12 months), and immunogenicity (ADA/Nab incidence measured during treatment cycles) in this phase I clinical trial.
Experiment 2 Reporting the Activity Date of This ADC [3]
Efficacy Data Progression Free Survival
4.44 months
Patients Enrolled
Inclusion: HER2+ (IHC2+/ISH+ or IHC3+) advanced solid tumor patients aged 18-75 with ECOG 0-1, adequate organ function, measurable disease. Exclusion: Active CNS metastases, LVEF<40%, &ge;Grade 2 neuropathy, uncontrolled cardiac/electrolyte disorders, active hepatitis/HIV, recent CYP3A modulators (14 days), or anthracycline exposure &ge;360mg/m2 doxorubicin equivalent. Contraception required for 12 weeks post-treatment.

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Administration Dosage
.
Related Clinical Trial
NCT Number NCT04146610  Clinical Status PHASE1
Clinical Description A Phase Ia, Multicenter, Open and Dose-increasing Study of DP303c to Evaluate the Safety , Pharmacokinetics, Immunogenicity and Antitumor Activity of Subjects With HER2-Positive Advanced Solid Tumors
Primary Endpoint
Primary endpoint is MTD determination of DP303c during the first 21-day cycle, defined as the highest dose where <2/6 patients experience DLT in advanced HER2+ solid tumors.
Other Endpoint
Secondary endpoints include PK parameters (Cmax, Tmax, AUC over 2 years), preliminary efficacy (ORR, DoR), and immunogenicity (ADA incidence) in this Phase I study.
Experiment 3 Reporting the Activity Date of This ADC [3]
Efficacy Data Objective Response Rate (ORR)
42.90%
Patients Enrolled
Inclusion: HER2+ (IHC2+/ISH+ or IHC3+) advanced solid tumor patients aged 18-75 with ECOG 0-1, adequate organ function, measurable disease. Exclusion: Active CNS metastases, LVEF<40%, &ge;Grade 2 neuropathy, uncontrolled cardiac/electrolyte disorders, active hepatitis/HIV, recent CYP3A modulators (14 days), or anthracycline exposure &ge;360mg/m2 doxorubicin equivalent. Contraception required for 12 weeks post-treatment.

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Administration Dosage
.
Related Clinical Trial
NCT Number NCT04146610  Clinical Status PHASE1
Clinical Description A Phase Ia, Multicenter, Open and Dose-increasing Study of DP303c to Evaluate the Safety , Pharmacokinetics, Immunogenicity and Antitumor Activity of Subjects With HER2-Positive Advanced Solid Tumors
Primary Endpoint
Primary endpoint is MTD determination of DP303c during the first 21-day cycle, defined as the highest dose where <2/6 patients experience DLT in advanced HER2+ solid tumors.
Other Endpoint
Secondary endpoints include PK parameters (Cmax, Tmax, AUC over 2 years), preliminary efficacy (ORR, DoR), and immunogenicity (ADA incidence) in this Phase I study.
Experiment 4 Reporting the Activity Date of This ADC [3]
Efficacy Data Disease control rate (DCR)
68.10%
Patients Enrolled
Inclusion: HER2+ (IHC2+/ISH+ or IHC3+) advanced solid tumor patients aged 18-75 with ECOG 0-1, adequate organ function, measurable disease. Exclusion: Active CNS metastases, LVEF<40%, &ge;Grade 2 neuropathy, uncontrolled cardiac/electrolyte disorders, active hepatitis/HIV, recent CYP3A modulators (14 days), or anthracycline exposure &ge;360mg/m2 doxorubicin equivalent. Contraception required for 12 weeks post-treatment.

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Administration Dosage
.
Related Clinical Trial
NCT Number NCT04146610  Clinical Status PHASE1
Clinical Description A Phase Ia, Multicenter, Open and Dose-increasing Study of DP303c to Evaluate the Safety , Pharmacokinetics, Immunogenicity and Antitumor Activity of Subjects With HER2-Positive Advanced Solid Tumors
Primary Endpoint
Primary endpoint is MTD determination of DP303c during the first 21-day cycle, defined as the highest dose where <2/6 patients experience DLT in advanced HER2+ solid tumors.
Other Endpoint
Secondary endpoints include PK parameters (Cmax, Tmax, AUC over 2 years), preliminary efficacy (ORR, DoR), and immunogenicity (ADA incidence) in this Phase I study.
Experiment 5 Reporting the Activity Date of This ADC [4]
Patients Enrolled
Inclusion: HER2+ breast cancer patients (IHC 3+ or IHC 2+/ISH+) aged 18-75 with &ge;2 prior anti-HER2 lines (including trastuzumab), measurable disease, ECOG 0-1, LVEF&ge;50%, and adequate organ function. Exclusion: Prior DP303c treatment, active CNS metastases, LVEF<40% history, uncontrolled comorbidities, recent anticancer therapies (4w chemo/2w endocrine), active infections (HBV/HCV), or CYP3A modulator use within 14 days. Contraception required for 6 months post-treatment.

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Administration Dosage
DP303c injection, 3.0 mg/kg, every 3 weeks.
Related Clinical Trial
NCT Number NCT05334810  Clinical Status PHASE2
Clinical Description A Multi-center, Open-lable, Single-arm Phase II Study to Evaluate the Efficacy and Safety of DP303c in Patients With HER2-positive Unresectable Locally Advanced, Relapsed, or Metastatic Breast Cancer
Primary Endpoint
Primary endpoint is ORR assessed by IRC per RECIST v1.1 with tumor evaluations every 6 weeks from baseline.
Other Endpoint
Secondary endpoints include DOR and PFS measured at 6-week intervals from baseline until progression.
Experiment 6 Reporting the Activity Date of This ADC [5]
Patients Enrolled
Inclusion: HER2+ breast cancer patients (IHC 3+/ISH+) aged &ge;18 with &ge;2 prior systemic therapies, measurable disease, ECOG 0-1, adequate organ function. Exclusion: Pregnancy, recent anticancer treatments (28d systemic/14d TCM therapy), active CNS metastases, LVEF<40%, severe comorbidities (cardiopulmonary/neuropathic/ocular), active infections (HBV/HCV/HIV), or CYP3A modulator use. Contraception required during study participation.

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Administration Dosage
Eligible patients will be treated with trastuzumab IV on day 1 and oral capecitabine twice daily on days 1-14 every 3 weeks, or patients will be treated with trastuzumab IV on day 1 and vinorelbine IV over on days 1 and 8 every 3 weeks.
Related Clinical Trial
NCT Number NCT05901935  Clinical Status PHASE3
Clinical Description A Multicentre, Randomized, Open-label, Controlled Phase III Clinical Study to Evaluate the Efficacy and Safety of DP303cversus Trastuzumab Combined With Vinorelbine/Capecitabine in of HER2-positive Advanced Breast Cancer
Primary Endpoint
Primary endpoint is PFS assessed by BIRC per RECIST v1.1 with follow-up up to 5 years.
Other Endpoint
Secondary endpoints include investigator-assessed PFS, OS, ORR, DoR (all evaluated per RECIST v1.1 over 5 years), and AE incidence/severity monitoring throughout the study period.
Experiment 7 Reporting the Activity Date of This ADC [6]
Patients Enrolled
Inclusion: HER2+ (IHC3+/ISH+) breast cancer patients &ge;18 years with prior trastuzumab/taxane treatment, ECOG 0-2, adequate organ function. Exclusion: Prior HER2-ADC therapy, active CNS metastases, uncontrolled effusions, Grade&ge;2 neuropathy, recent anticancer therapies (4w immunotherapy/2w chemotherapy), ocular/cardiopulmonary comorbidities, or active infections requiring IV treatment.

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Administration Dosage
DP303c injection, 3.0 mg/kg, Q3W.
Related Clinical Trial
NCT Number NCT06313086  Clinical Status PHASE3
Clinical Description A Multicentre, Randomized, Open-label, Controlled Phase III Clinical Study to Evaluate the Efficacy and Safety of DP303c Versus Trastuzumab Emtansine in Patients With HER2-positive Advanced Breast Cancer
Primary Endpoint
Primary endpoint is BIRC-assessed PFS per RECIST v1.1 with 4-year follow-up in HER2+ advanced/metastatic breast cancer patients.
Other Endpoint
Secondary endpoints include investigator-assessed PFS, OS, ORR, DoR (all per RECIST v1.1) and AE monitoring over 4 years, evaluating both efficacy and safety outcomes.
Experiment 8 Reporting the Activity Date of This ADC [7]
Patients Enrolled
Eligibility requires age 18-75 with progressed gastric cancer after 1-2 prior therapies (including platinum/fluorouracil), measurable lesions, and organ function adequacy. Key exclusions: trastuzumab intolerance, uncontrolled effusions, active CNS metastases, &ge;Grade 2 neuropathy, recent CYP3A4/UGT1A1 modulator use, or significant ocular/cardiovascular comorbidities.

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Administration Dosage
DP303c injection, dose level 1, intravenous drip, Q3W + simmitinib tablets, dose level 1, oral, QD, taken for 3 weeks, discontinued for 1 week, Q4W
Related Clinical Trial
NCT Number NCT06577376  Clinical Status PHASE1|||PHASE2
Clinical Description A Multicenter, Open-label Phase I/II Clinical Study to Evaluate the Safety and Efficacy of Simmitinib or Irinotecan Liposomes Combined With DP303c Injection in the Treatment of HER2 Expressing Gastric Adenocarcinoma or Gastroesophageal Junction Adenocarcinoma
Primary Endpoint
Primary endpoints include DLT occurrence/incidence, AE/SAE monitoring, and ORR per RECIST 1.1 assessed over 36 months in HER2-positive (IHC 1+/2+/3+) gastric/GEJ adenocarcinoma patients.
Other Endpoint
Secondary outcomes comprise efficacy measures (DCR, DoR, PFS, OS) and pharmacokinetic evaluations (DP303c/simmitinib concentrations, ADA incidence, HER2 expression) tracked for 36 months.
Experiment 9 Reporting the Activity Date of This ADC [8]
Patients Enrolled
Inclusion: Age 18-75 with histologically confirmed advanced gastric cancer, ECOG 0-1, adequate organ function, measurable lesions (RECIST v1.1), and progression after platinum/taxane-based therapy (HER2-positive cohorts require prior trastuzumab). Exclusion: Active CNS metastases, uncontrolled effusions, &ge;Grade 2 neuropathy, cardiac dysfunction (LVEF<50%), recent CYP3A4 modulators, or prior HER2-ADC therapy. Contraception required for 6 months post-treatment.

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Administration Dosage
Patients with HER2-positive advanced or metastatic gastric cancer after receiving 1st-line treatment will be treated with DP303c injection at 2.0 mg/kg,2.5 mg/kg or 3.0 mg/kg every 3 weeks to determine the recommended dose.
Related Clinical Trial
NCT Number NCT04826107  Clinical Status PHASE2
Clinical Description An Open-label, Multicentre, Phase II Study of DP303c Injection in Patients With Unresectable Locally Advanced, Recurrent or Metastatic Gastric Cancer With HER2 Expression
Primary Endpoint
Primary endpoint is ORR (CR+PR rate) assessed over 2.5 years in HER2-positive/low-expression gastric/GEJ adenocarcinoma patients with progression after ≥1 prior therapy.
Other Endpoint
Secondary endpoints include PFS, OS, DCR, DoR (all measured over 2.5 years) and AE/SAE monitoring, evaluating both efficacy and safety outcomes in this multicenter trial.
Experiment 10 Reporting the Activity Date of This ADC [9]
Patients Enrolled
Inclusion: Women aged 18-75 with ECOG 0-2, measurable lesions (RECIST v1.1), adequate organ function, and HER2 IHC 1+/2+/3+ status. Exclusion: Active CNS metastases, &ge;Grade 2 neuropathy, LVEF<50%, uncontrolled effusions, recent CYP3A4 modulators (28 days), prior HER2-ADC therapy, or anthracycline exposure >500mg/m2 doxorubicin equivalent. Contraception required for 6 months post-treatment.

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Administration Dosage
Part1:Patients with HER2-expressing advanced ovarian cancer will be treated with DP303c injection at 2.0 mg/kg or 3.0 mg/kg every 3 weeks (Q3W) to determine the recommended phase 2 dose (RP2D).Part2a:Patients with HER2-overexpressing advanced ovarian cancer will be treated with DP303c injection at RP2D.Part2b:Patients with HER2-lowexpressing advanced ovarian cancer will be treated with DP303c injection at RP2D.

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Related Clinical Trial
NCT Number NCT04828616  Clinical Status PHASE2
Clinical Description An Open-label, Multicentre, Phase II Study of DP303c Injection in Patients With HER2-expressing Advanced Ovarian Cancer
Primary Endpoint
Primary endpoint is ORR (CR+PR rate) assessed over 3 years in HER2-positive/low-expressing ovarian/tubal/peritoneal cancer patients with prior platinum therapy.
Other Endpoint
Secondary endpoints include PFS, OS, DoR (3-year follow-up), AE/SAE monitoring (NCI-CTCAE v5.0), PK parameters (Cmax/Tmax/AUC of DP303c), and ADA incidence in this phase I/II study.
Experiment 11 Reporting the Activity Date of This ADC [10]
Related Clinical Trial
NCT Number NCT04826107  Clinical Status Phase 2
Clinical Description An open-label, multicentre, phase 2 study of DP303c injection in patients with unresectable locally advanced, recurrent or metastatic gastric cancer with HER2 expression.
Experiment 12 Reporting the Activity Date of This ADC [11]
Related Clinical Trial
NCT Number NCT04828616  Clinical Status Phase 2
Clinical Description An open-label, multicentre, phase 2 study of DP303c injection in patients with HER2-expressing advanced ovarian cancer.
Experiment 13 Reporting the Activity Date of This ADC [12]
Related Clinical Trial
NCT Number NCT05334810  Clinical Status Phase 2
Clinical Description A multi-center, open-lable, single-arm phase 2 study to evaluate the efficacy and safety of DP303c in patients with HER2-positive unresectable locally advanced, relapsed, or metastatic breast cancer.
Experiment 14 Reporting the Activity Date of This ADC [13]
Related Clinical Trial
NCT Number NCT04146610  Clinical Status Phase 1
Clinical Description A phase 1a, multicenter, open and dose-increasing study of DP303c to evaluate the safety , pharmacokinetics, immunogenicity and antitumor activity of subjects with HER2-positive advanced solid tumors.
Discovered Using Cell Line-derived Xenograft Model
Click To Hide/Show 34 Activity Data Related to This Level
Experiment 1 Reporting the Activity Date of This ADC [14]
Efficacy Data Tumor Growth Inhibition value (TGI) ≈ 7.60% Moderate HER2 expression (HER2++)
Method Description
DP001 (10 mg/kg).
In Vivo Model JIMT -1 cell line xenograft model
In Vitro Model Breast ductal carcinoma JIMT-1 cells CVCL_2077
Experiment 2 Reporting the Activity Date of This ADC [14]
Efficacy Data Tumor Growth Inhibition value (TGI) ≈ 16.20% Moderate HER2 expression (HER2++)
Method Description
T-DM1 (10 mg/kg).
In Vivo Model JIMT -1 cell line xenograft model
In Vitro Model Breast ductal carcinoma JIMT-1 cells CVCL_2077
Experiment 3 Reporting the Activity Date of This ADC [14]
Efficacy Data Tumor Growth Inhibition value (TGI) ≈ 28.47% High HER2 expression (HER2+++/++)
Method Description
DP001 (10 mg/kg).
In Vivo Model SK-OV-3 cell line xenograft model
In Vitro Model Ovarian serous cystadenocarcinoma SK-OV-3 cells CVCL_0532
Experiment 4 Reporting the Activity Date of This ADC [14]
Efficacy Data Tumor Growth Inhibition value (TGI) ≈ 33.60% High HER2 expression (HER2+++/++)
Method Description
DP001 (10 mg/kg).
In Vivo Model NCI-N87 xenograft model
In Vitro Model Gastric tubular adenocarcinoma NCI-N87 cells CVCL_1603
Experiment 5 Reporting the Activity Date of This ADC [14]
Efficacy Data Tumor Growth Inhibition value (TGI) ≈ 39% Moderate HER2 expression (HER2++)
Method Description
DP303c (0.3 mg/kg).
In Vivo Model JIMT -1 cell line xenograft model
In Vitro Model Breast ductal carcinoma JIMT-1 cells CVCL_2077
Experiment 6 Reporting the Activity Date of This ADC [14]
Efficacy Data Tumor Growth Inhibition value (TGI) ≈ 45.26% High HER2 expression (HER2+++/++)
Method Description
DP303c (1 mg/kg).
In Vivo Model SK-OV-3 cell line xenograft model
In Vitro Model Ovarian serous cystadenocarcinoma SK-OV-3 cells CVCL_0532
Experiment 7 Reporting the Activity Date of This ADC [14]
Efficacy Data Tumor Growth Inhibition value (TGI) ≈ 54.40% Moderate HER2 expression (HER2++)
Method Description
Pathogen-free female nude mice were injected subcutaneously with each cell suspension. According to tumor volumes,the mice were randomly divided in two groups: treatment and control groups. Each drug was given to the animals intravenously. The dosing frequency was once a week (qw), qw 2 or qw 3.DP303c induced obvious tumor growth inhibition at a single dose of 0.1 mg/kg.

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In Vitro Model Breast ductal carcinoma JIMT-1 cells CVCL_2077
Experiment 8 Reporting the Activity Date of This ADC [14]
Efficacy Data Tumor Growth Inhibition value (TGI) ≈ 82.10% High HER2 expression (HER2+++)
Method Description
Pathogen-free female nude mice were injected subcutaneously with each cell suspension. According to tumor volumes,the mice were randomly divided in two groups: treatment and control groups. Each drug was given to the animals intravenously. The dosing frequency was once a week (qw), qw 2 or qw 3.DP303c induced obvious tumor growth inhibition at a single dose of 1 mg/kg.

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In Vitro Model Breast adenocarcinoma SK-BR-3 cells CVCL_0033
Experiment 9 Reporting the Activity Date of This ADC [14]
Efficacy Data Tumor Growth Inhibition value (TGI) ≈ 83.94% High HER2 expression (HER2+++/++)
Method Description
DP303c (3 mg/kg).
In Vivo Model SK-OV-3 cell line xenograft model
In Vitro Model Ovarian serous cystadenocarcinoma SK-OV-3 cells CVCL_0532
Experiment 10 Reporting the Activity Date of This ADC [14]
Efficacy Data Tumor Growth Inhibition value (TGI) ≈ 90.48% High HER2 expression (HER2+++/++)
Method Description
DP001 (15 mg/kg).
In Vivo Model HCC1954 cell line xenograft model
In Vitro Model Breast ductal carcinoma HCC1954 cells CVCL_1259
Experiment 11 Reporting the Activity Date of This ADC [14]
Efficacy Data Tumor Growth Inhibition value (TGI) ≈ 91.60% High HER2 expression (HER2+++/++)
Method Description
T-DM1 (10 mg/kg).
In Vivo Model NCI-N87 xenograft model
In Vitro Model Gastric tubular adenocarcinoma NCI-N87 cells CVCL_1603
Experiment 12 Reporting the Activity Date of This ADC [14]
Efficacy Data Tumor Growth Inhibition value (TGI) ≈ 94% High HER2 expression (HER2+++/++)
Method Description
DP303c (10 mg/kg).
In Vivo Model NCI-N87 xenograft model
In Vitro Model Gastric tubular adenocarcinoma NCI-N87 cells CVCL_1603
Experiment 13 Reporting the Activity Date of This ADC [14]
Efficacy Data Tumor Growth Inhibition value (TGI) ≈ 94% High HER2 expression (HER2+++/++)
Method Description
DP303c (5 mg/kg).
In Vivo Model NCI-N87 xenograft model
In Vitro Model Gastric tubular adenocarcinoma NCI-N87 cells CVCL_1603
Experiment 14 Reporting the Activity Date of This ADC [14]
Efficacy Data Tumor Growth Inhibition value (TGI) ≈ 94% High HER2 expression (HER2+++/++)
Method Description
DP303c (2.5 mg/kg).
In Vivo Model NCI-N87 xenograft model
In Vitro Model Gastric tubular adenocarcinoma NCI-N87 cells CVCL_1603
Experiment 15 Reporting the Activity Date of This ADC [14]
Efficacy Data Tumor Growth Inhibition value (TGI) ≈ 94.10% High HER2 expression (HER2+++)
Method Description
Pathogen-free female nude mice were injected subcutaneously with each cell suspension. According to tumor volumes,the mice were randomly divided in two groups: treatment and control groups. Each drug was given to the animals intravenously. The dosing frequency was once a week (qw), qw 2 or qw 3.DP303c induced obvious tumor growth inhibition at a single dose of 3 mg/kg.

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In Vitro Model Breast adenocarcinoma SK-BR-3 cells CVCL_0033
Experiment 16 Reporting the Activity Date of This ADC [14]
Efficacy Data Tumor Growth Inhibition value (TGI) ≈ 94.16% High HER2 expression (HER2+++/++)
Method Description
T-DM1 (10 mg/kg).
In Vivo Model SK-OV-3 cell line xenograft model
In Vitro Model Ovarian serous cystadenocarcinoma SK-OV-3 cells CVCL_0532
Experiment 17 Reporting the Activity Date of This ADC [14]
Efficacy Data Tumor Growth Inhibition value (TGI) ≈ 94.30% High HER2 expression (HER2+++/++)
Method Description
T-DM1 (15 mg/kg).
In Vivo Model HCC1954 cell line xenograft model
In Vitro Model Breast ductal carcinoma HCC1954 cells CVCL_1259
Experiment 18 Reporting the Activity Date of This ADC [14]
Efficacy Data Tumor Growth Inhibition value (TGI) ≈ 97% High HER2 expression (HER2+++/++)
Method Description
DP303c (3 mg/kg).
In Vivo Model HCC1954 cell line xenograft model
In Vitro Model Breast ductal carcinoma HCC1954 cells CVCL_1259
Experiment 19 Reporting the Activity Date of This ADC [14]
Efficacy Data Tumor Growth Inhibition value (TGI) ≈ 97% High HER2 expression (HER2+++/++)
Method Description
DP303c (10 mg/kg).
In Vivo Model HCC1954 cell line xenograft model
In Vitro Model Breast ductal carcinoma HCC1954 cells CVCL_1259
Experiment 20 Reporting the Activity Date of This ADC [14]
Efficacy Data Tumor Growth Inhibition value (TGI) ≈ 97% High HER2 expression (HER2+++/++)
Method Description
DP303c (15 mg/kg).
In Vivo Model HCC1954 cell line xenograft model
In Vitro Model Breast ductal carcinoma HCC1954 cells CVCL_1259
Experiment 21 Reporting the Activity Date of This ADC [14]
Efficacy Data Tumor Growth Inhibition value (TGI) ≈ 97.10% High HER2 expression (HER2+++)
Method Description
Pathogen-free female nude mice were injected subcutaneously with each cell suspension. According to tumor volumes,the mice were randomly divided in two groups: treatment and control groups. Each drug was given to the animals intravenously. The dosing frequency was once a week (qw), qw 2 or qw 3.DP303c induced obvious tumor growth inhibition at a single dose of 3 mg/kg.

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In Vitro Model Breast ductal carcinoma HCC1954 cells CVCL_1259
Experiment 22 Reporting the Activity Date of This ADC [14]
Efficacy Data Tumor Growth Inhibition value (TGI) ≈ 97.50% High HER2 expression (HER2+++)
Method Description
Pathogen-free female nude mice were injected subcutaneously with each cell suspension. According to tumor volumes,the mice were randomly divided in two groups: treatment and control groups. Each drug was given to the animals intravenously. The dosing frequency was once a week (qw), qw 2 or qw 3.DP303c induced obvious tumor growth inhibition at a single dose of 10 mg/kg.

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In Vitro Model Breast ductal carcinoma HCC1954 cells CVCL_1259
Experiment 23 Reporting the Activity Date of This ADC [14]
Efficacy Data Tumor Growth Inhibition value (TGI) ≈ 97.50% High HER2 expression (HER2+++)
Method Description
Pathogen-free female nude mice were injected subcutaneously with each cell suspension. According to tumor volumes,the mice were randomly divided in two groups: treatment and control groups. Each drug was given to the animals intravenously. The dosing frequency was once a week (qw), qw 2 or qw 3.DP303c induced obvious tumor growth inhibition at a single dose of 2.5 mg/kg.

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In Vitro Model Gastric tubular adenocarcinoma NCI-N87 cells CVCL_1603
Experiment 24 Reporting the Activity Date of This ADC [14]
Efficacy Data Tumor Growth Inhibition value (TGI) ≈ 97.80% Moderate HER2 expression (HER2++)
Method Description
Pathogen-free female nude mice were injected subcutaneously with each cell suspension. According to tumor volumes,the mice were randomly divided in two groups: treatment and control groups. Each drug was given to the animals intravenously. The dosing frequency was once a week (qw), qw 2 or qw 3.DP303c induced obvious tumor growth inhibition at a single dose of 1 mg/kg.

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In Vitro Model Breast ductal carcinoma JIMT-1 cells CVCL_2077
Experiment 25 Reporting the Activity Date of This ADC [14]
Efficacy Data Tumor Growth Inhibition value (TGI) ≈ 97.80% High HER2 expression (HER2+++)
Method Description
Pathogen-free female nude mice were injected subcutaneously with each cell suspension. According to tumor volumes,the mice were randomly divided in two groups: treatment and control groups. Each drug was given to the animals intravenously. The dosing frequency was once a week (qw), qw 2 or qw 3.DP303c induced obvious tumor growth inhibition at a single dose of 10 mg/kg.

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In Vitro Model Breast adenocarcinoma SK-BR-3 cells CVCL_0033
Experiment 26 Reporting the Activity Date of This ADC [14]
Efficacy Data Tumor Growth Inhibition value (TGI) ≈ 97.80% High HER2 expression (HER2+++)
Method Description
Pathogen-free female nude mice were injected subcutaneously with each cell suspension. According to tumor volumes,the mice were randomly divided in two groups: treatment and control groups. Each drug was given to the animals intravenously. The dosing frequency was once a week (qw), qw 2 or qw 3.DP303c induced obvious tumor growth inhibition at a single dose of 5 mg/kg.

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In Vitro Model Gastric tubular adenocarcinoma NCI-N87 cells CVCL_1603
Experiment 27 Reporting the Activity Date of This ADC [14]
Efficacy Data Tumor Growth Inhibition value (TGI) ≈ 98.50% High HER2 expression (HER2+++)
Method Description
Pathogen-free female nude mice were injected subcutaneously with each cell suspension. According to tumor volumes,the mice were randomly divided in two groups: treatment and control groups. Each drug was given to the animals intravenously. The dosing frequency was once a week (qw), qw 2 or qw 3.DP303c induced obvious tumor growth inhibition at a single dose of 10 mg/kg.

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In Vitro Model Gastric tubular adenocarcinoma NCI-N87 cells CVCL_1603
Experiment 28 Reporting the Activity Date of This ADC [14]
Efficacy Data Tumor Growth Inhibition value (TGI) ≈ 98.54% High HER2 expression (HER2+++/++)
Method Description
DP303c (10 mg/kg).
In Vivo Model SK-OV-3 cell line xenograft model
In Vitro Model Ovarian serous cystadenocarcinoma SK-OV-3 cells CVCL_0532
Experiment 29 Reporting the Activity Date of This ADC [14]
Efficacy Data Tumor Growth Inhibition value (TGI) ≈ 98.80% Moderate HER2 expression (HER2++)
Method Description
Pathogen-free female nude mice were injected subcutaneously with each cell suspension. According to tumor volumes,the mice were randomly divided in two groups: treatment and control groups. Each drug was given to the animals intravenously. The dosing frequency was once a week (qw), qw 2 or qw 3.DP303c induced obvious tumor growth inhibition at a single dose of 3 mg/kg.

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In Vitro Model Breast ductal carcinoma JIMT-1 cells CVCL_2077
Experiment 30 Reporting the Activity Date of This ADC [14]
Efficacy Data Tumor Growth Inhibition value (TGI) ≈ 99.10% High HER2 expression (HER2+++)
Method Description
Pathogen-free female nude mice were injected subcutaneously with each cell suspension. According to tumor volumes,the mice were randomly divided in two groups: treatment and control groups. Each drug was given to the animals intravenously. The dosing frequency was once a week (qw), qw 2 or qw 3.DP303c induced obvious tumor growth inhibition at a single dose of 15 mg/kg.

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In Vitro Model Breast ductal carcinoma HCC1954 cells CVCL_1259
Experiment 31 Reporting the Activity Date of This ADC [14]
Efficacy Data Tumor Growth Inhibition value (TGI) ≈ 99.90% Moderate HER2 expression (HER2++)
Method Description
Pathogen-free female nude mice were injected subcutaneously with each cell suspension. According to tumor volumes,the mice were randomly divided in two groups: treatment and control groups. Each drug was given to the animals intravenously. The dosing frequency was once a week (qw), qw 2 or qw 3.DP303c induced obvious tumor growth inhibition at a single dose of 10 mg/kg.

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In Vitro Model Breast ductal carcinoma JIMT-1 cells CVCL_2077
Experiment 32 Reporting the Activity Date of This ADC [14]
Efficacy Data Tumor Growth Inhibition value (TGI) ≈ 100% Moderate HER2 expression (HER2++)
Method Description
DP303c (10 mg/kg).
In Vivo Model JIMT -1 cell line xenograft model
In Vitro Model Breast ductal carcinoma JIMT-1 cells CVCL_2077
Experiment 33 Reporting the Activity Date of This ADC [14]
Efficacy Data Tumor Growth Inhibition value (TGI) ≈ 100% Moderate HER2 expression (HER2++)
Method Description
DP303c (3 mg/kg).
In Vivo Model JIMT -1 cell line xenograft model
In Vitro Model Breast ductal carcinoma JIMT-1 cells CVCL_2077
Experiment 34 Reporting the Activity Date of This ADC [14]
Efficacy Data Tumor Growth Inhibition value (TGI) ≈ 100% Moderate HER2 expression (HER2++)
Method Description
DP303c (1 mg/kg).
In Vivo Model JIMT -1 cell line xenograft model
In Vitro Model Breast ductal carcinoma JIMT-1 cells CVCL_2077
Revealed Based on the Cell Line Data
Click To Hide/Show 14 Activity Data Related to This Level
Experiment 1 Reporting the Activity Date of This ADC [14]
Efficacy Data Half Maximal Inhibitory Concentration (IC50) 0.07 nM Moderate HER2 expression (HER2++; HER2 MFI=157,231)
Method Description
Comparison of in vitro Activity Between DP303c and T -DM1 in Variable HER2 Cell Lines.
In Vitro Model Breast adenocarcinoma SK-BR-3 cells CVCL_0033
Experiment 2 Reporting the Activity Date of This ADC [14]
Efficacy Data Half Maximal Inhibitory Concentration (IC50) 0.07 nM High HER2 expression (HER2+++)
Method Description
To obtain a single-cell suspension, the cells were harvested and resuspended. The cell density was adjusted to 1 x105 cells/mL and seeded in a 96-well cell culture plate at 100 uL/well (1 x104 cells/well). DP303c labeled with DyLight 488 was added into the 96-well plate with a final concentration of 2 ug/mL.
In Vitro Model Breast adenocarcinoma SK-BR-3 cells CVCL_0033
Experiment 3 Reporting the Activity Date of This ADC [14]
Efficacy Data Half Maximal Inhibitory Concentration (IC50) 0.08 nM High HER2 expression (HER2+++; HER2 MFI=987,353)
Method Description
Comparison of in vitro Activity Between DP303c and T -DM1 in Variable HER2 Cell Lines.
In Vitro Model Invasive breast carcinoma BT-474 cells CVCL_0179
Experiment 4 Reporting the Activity Date of This ADC [14]
Efficacy Data Half Maximal Inhibitory Concentration (IC50) 0.08 nM Negative HER2 expression (HER2-; HER2 MFI=256)
Method Description
To obtain a single-cell suspension, the cells were harvested and resuspended. The cell density was adjusted to 1x105 cells/mL and seeded in a 96-well cell culture plate at 100 uL/well (1 x104 cells/well). DP303c labeled with DyLight 488 was added into the 96-well plate with a final concentration of 2 ug/mL.
In Vitro Model Invasive breast carcinoma BT-474 cells CVCL_0179
Experiment 5 Reporting the Activity Date of This ADC [14]
Efficacy Data Half Maximal Inhibitory Concentration (IC50) 0.15 nM High HER2 expression (HER2+++)
Method Description
Comparison of in vitro Activity Between DP303c and T -DM1 in Variable HER2 Cell Lines.
In Vitro Model Breast ductal carcinoma HCC1954 cells CVCL_1259
Experiment 6 Reporting the Activity Date of This ADC [14]
Efficacy Data Half Maximal Inhibitory Concentration (IC50) 0.15 nM High HER2 expression (HER2+++)
Method Description
To obtain a single-cell suspension, the cells were harvested and resuspended. The cell density was adjusted to 1 x105 cells/mL and seeded in a 96-well cell culture plate at 100 uL/well (1 x104 cells/well). DP303c labeled with DyLight 488 was added into the 96-well plate with a final concentration of 2 ug/mL.
In Vitro Model Breast ductal carcinoma HCC1954 cells CVCL_1259
Experiment 7 Reporting the Activity Date of This ADC [14]
Efficacy Data Half Maximal Inhibitory Concentration (IC50) 0.22 nM Negative HER2 expression (HER2-)
Method Description
Comparison of in vitro Activity Between DP303c and T -DM1 in Variable HER2 Cell Lines.
In Vitro Model Ovarian serous cystadenocarcinoma SK-OV-3 cells CVCL_0532
Experiment 8 Reporting the Activity Date of This ADC [14]
Efficacy Data Half Maximal Inhibitory Concentration (IC50) 0.22 nM High HER2 expression (HER2+++)
Method Description
To obtain a single-cell suspension, the cells were harvested and resuspended. The cell density was adjusted to 1 x105 cells/mL and seeded in a 96-well cell culture plate at 100 uL/well (1 x104 cells/well). DP303c labeled with DyLight 488 was added into the 96-well plate with a final concentration of 2 ug/mL.
In Vitro Model Ovarian serous cystadenocarcinoma SK-OV-3 cells CVCL_0532
Experiment 9 Reporting the Activity Date of This ADC [14]
Efficacy Data Half Maximal Inhibitory Concentration (IC50) 0.23 nM High HER2 expression (HER2+++; HER2 MFI=804,573)
Method Description
Comparison of in vitro Activity Between DP303c and T -DM1 in Variable HER2 Cell Lines.
In Vitro Model Gastric tubular adenocarcinoma NCI-N87 cells CVCL_1603
Experiment 10 Reporting the Activity Date of This ADC [14]
Efficacy Data Half Maximal Inhibitory Concentration (IC50) 0.23 nM High HER2 expression (HER2+++; HER2 MFI=892,333)
Method Description
To obtain a single-cell suspension, the cells were harvested and resuspended. The cell density was adjusted to 1 x105 cells/mL and seeded in a 96-well cell culture plate at 100 uL/well (1 x104 cells/well). DP303c labeled with DyLight 488 was added into the 96-well plate with a final concentration of 2 ug/mL.
In Vitro Model Gastric tubular adenocarcinoma NCI-N87 cells CVCL_1603
Experiment 11 Reporting the Activity Date of This ADC [14]
Efficacy Data Half Maximal Inhibitory Concentration (IC50) 3.39 nM High HER2 expression (HER2+++)
Method Description
Comparison of in vitro Activity Between DP303c and T -DM1 in Variable HER2 Cell Lines.
In Vitro Model Breast ductal carcinoma JIMT-1 cells CVCL_2077
Experiment 12 Reporting the Activity Date of This ADC [14]
Efficacy Data Half Maximal Inhibitory Concentration (IC50) 3.39 nM Moderate HER2 expression (HER2++)
Method Description
To obtain a single-cell suspension, the cells were harvested and resuspended. The cell density was adjusted to 1x105 cells/mL and seeded in a 96-well cell culture plate at 100 uL/well (1x104 cells/well). DP303c labeled with DyLight 488 was added into the 96-well plate with a final concentration of 2 ug/mL.
In Vitro Model Breast ductal carcinoma JIMT-1 cells CVCL_2077
Experiment 13 Reporting the Activity Date of This ADC [14]
Efficacy Data Half Maximal Inhibitory Concentration (IC50) > 50 nM High HER2 expression (HER2+++; HER2 MFI=1,106,494)
Method Description
To obtain a single-cell suspension, the cells were harvested and resuspended. The cell density was adjusted to 1x105 cells/mL and seeded in a 96-well cell culture plate at 100 uL/well (1x104 cells/well). DP303c labeled with DyLight 488 was added into the 96-well plate with a final concentration of 2 ug/mL.
In Vitro Model Breast adenocarcinoma MDA-MB-468 cells CVCL_0419
Experiment 14 Reporting the Activity Date of This ADC [14]
Efficacy Data Half Maximal Inhibitory Concentration (IC50) > 1000 nM High HER2 expression (HER2+++; HER2 MFI=765,629)
Method Description
Comparison of in vitro Activity Between DP303c and T -DM1 in Variable HER2 Cell Lines.
In Vitro Model Breast adenocarcinoma MDA-MB-468 cells CVCL_0419
References
Ref 1 First-in-human study of DP303c, a HER2-targeted antibody-drug conjugate in patients with HER2 positive solid tumors
Ref 2 A Study of DP303c in Patients With HER2-positive Advanced Solid Tumors
Ref 3 Study of DP303c Administered Intravenously to Subjects With HER2-Positive in Advanced Solid Tumors
Ref 4 DP303c in Patients With HER2-positive Unresectable Locally Advanced, Relapsed, or Metastaticbreast Cancer
Ref 5 DP303c in Patients With HER2-positive Advanced Breast Cancer
Ref 6 DP303c Versus Trastuzumab Emtansine in in Patients With HER2-positive Advanced Breast Cancer
Ref 7 A PhaseI/II Study of Simmitinib or Irinotecan Liposomes Combined With DP303c in Gastric Adenocarcinoma or Gastroesophageal Junction Adenocarcinoma
Ref 8 Study of DP303c Injection in Patients With Advanced or Metastatic Gastric Cancer
Ref 9 Study of DP303c Injection in Patients With Advanced Ovarian Cancer
Ref 10 An Open-label, Multicentre, Phase II Study of DP303c Injection in Patients With Unresectable Locally Advanced, Recurrent or Metastatic Gastric Cancer With HER2 Expression, NCT04826107
Ref 11 An Open-label, Multicentre, Phase II Study of DP303c Injection in Patients With HER2-expressing Advanced Ovarian Cancer, NCT04828616
Ref 12 A Multi-center, Open-lable, Single-arm Phase II Study to Evaluate the Efficacy and Safety of DP303c in Patients With HER2-positive Unresectable Locally Advanced, Relapsed, or Metastatic Breast Cancer, NCT05334810
Ref 13 A Phase Ia, Multicenter, Open and Dose-increasing Study of DP303c to Evaluate the Safety , Pharmacokinetics, Immunogenicity and Antitumor Activity of Subjects With HER2-Positive Advanced Solid Tumors, NCT04146610
Ref 14 An Innovative Site-Specific Anti-HER2 Antibody-Drug Conjugate with High Homogeneity and Improved Therapeutic Index. Onco Targets Ther. 2022 Apr 8;15:331-343.