General Information of This Antibody-drug Conjugate (ADC)
ADC ID
DRG0CRDKL
ADC Name
HKT288
Synonyms
HKT288; NOV-13
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Organization
MorphoSys (Top20 MNC) (Originator);Novartis (Top20 MNC);ImmunoGen (Top20 MNC)
Drug Status
Phase 1 (discontinued)
Structure
Antibody Name
Anti-CDH6 HKT-288 mAb
 Antibody Info 
Antigen Name
Cadherin-6 (CDH6)
 Antigen Info 
Payload Name
DM4
 Payload Info 
Therapeutic Target
Microtubule (MT)
 Target Info 
Linker Name
Sulfo-SPDB
 Linker Info 
Conjugate Type
Random Lysines
Combination Type
soravtansine
The indication landscape of This ADC(2027 Update)
The clinical trial pipeline of This ADC(2027 Update)
Indication Phase 1 Phase 1/2 Phase 2 Phase 2/3 Phase 3 New Drug Application Approved
Kidney cancer
1 Trials
Trial ID
NCT02947152; jRCT2080223451; JapicCTI-173506
Ovarian cancer
1 Trials
Trial ID
NCT02947152; jRCT2080223451; JapicCTI-173506
Unspecific solid tumor
1 Trials
Trial ID
NCT02947152; jRCT2080223451; JapicCTI-173506
General Information of The Activity Data Related to This ADC
Identified from the Human Clinical Data
Click To Hide/Show 3 Activity Data Related to This Level
Standard Type NCT Number Clinical Status Clinical Trial Description
Undisclosed  NCT02947152
Phase 1
A phase 1, multicenter, open-label dose escalation and expansion study of HKT288, administered intravenously in adult patients with advanced solid tumors, including epithelial ovarian cancer and renal cell carcinoma.

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Undisclosed  NCT02947152
Phase 1
A phase 1, multicenter, open-label dose escalation and expansion study of HKT288, administered intravenously in adult patients with advanced solid tumors, including epithelial ovarian cancer and renal cell carcinoma.

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Undisclosed  NCT02947152
PHASE1
A Phase I, Multicenter, Open-label Dose Escalation and Expansion Study of HKT288, Administered Intravenously in Adult Patients With Advanced Solid Tumors, Including Epithelial Ovarian Cancer and Renal Cell Carcinoma

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Discovered Using Cell Line-derived Xenograft Model
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Standard Type Value Units Cell Line Disease Model
Tumor Growth Inhibition value (TGI) 
≈ 90
%
OVCAR-3 cells
Ovarian serous adenocarcinoma
Tumor Growth Inhibition value (TGI) 
≈ 100
%
OVCAR-3 cells
Ovarian serous adenocarcinoma
Full List of Activity Data of This Antibody-drug Conjugate
Identified from the Human Clinical Data
Click To Hide/Show 3 Activity Data Related to This Level
Experiment 1 Reporting the Activity Date of This ADC [1]
Patients Enrolled
Patients with advanced solid tumors, including epithelial ovarian cancer and renal cell carcinoma.
Administration Dosage
Cadherin-6-targeting ADC iv at dose of 0.30, 0.75 mg/kg.
Related Clinical Trial
NCT Number NCT02947152  Clinical Status Phase 1
Clinical Description A phase 1, multicenter, open-label dose escalation and expansion study of HKT288, administered intravenously in adult patients with advanced solid tumors, including epithelial ovarian cancer and renal cell carcinoma.
Experiment 2 Reporting the Activity Date of This ADC [2]
Patients Enrolled
Advanced (metastatic or locally advanced) serous epithelial ovarian, serous fallopian tubal or serous primary peritoneal cancer or advanced clear cell or papillary renal cell carcinoma (RCC), who had received or were intolerant to all therapies known to confer clinical benefit for their disease and Eastern Cooperative Oncology Group (ECOG) performance status 2.

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Administration Dosage
HKT288 was administered intravenously (IV) every 3 weeks until patients experienced unacceptable toxicity or progressive disease (PD). The starting dose of 0.30 mg/kg was determined based on the highest nonseverely toxic dose in monkeys, which was 2 mg/kg IV weekly.
Related Clinical Trial
NCT Number NCT02947152  Clinical Status Phase 1
Clinical Description A phase 1, multicenter, open-label dose escalation and expansion study of HKT288, administered intravenously in adult patients with advanced solid tumors, including epithelial ovarian cancer and renal cell carcinoma.
Primary Endpoint
The best overall response on the 0.30 mg/kg cohort in patients with measurable disease was RECIST v1.1 stable disease in 3 patients and PD in 2 patients.
Experiment 3 Reporting the Activity Date of This ADC [4]
Patients Enrolled
Eligible patients had advanced CDH6-positive ovarian/renal cancers refractory to standard therapies (ECOG ≤2); exclusions comprised active CNS metastases, corneal disorders, QTcF >470ms, prior maytansine-ADC use, or recent anticancer treatments (chemotherapy ≤4-6 weeks, biologics ≤4 weeks, radiation ≤2-4 weeks), ensuring cohort safety.
Administration Dosage
HKT288 was administered intravenously (IV) every 3 weeks until patients experienced unacceptable toxicity or progressive disease (PD). The starting dose of 0.3 mg/kg was determined based on the highest nonseverely toxic dose in monkeys, which was 2 mg/kg IV weekly.
Related Clinical Trial
NCT Number NCT02947152  Clinical Status PHASE1
Clinical Description A Phase I, Multicenter, Open-label Dose Escalation and Expansion Study of HKT288, Administered Intravenously in Adult Patients With Advanced Solid Tumors, Including Epithelial Ovarian Cancer and Renal Cell Carcinoma
Primary Endpoint
Safety assessments focused on dose-limiting toxicities (DLTs) during the 21-day evaluation period, while tracking adverse events (AEs) and serious AEs (SAEs) for ~6 months post-treatment, including dose modifications and severity grading to evaluate tolerability.
Other Endpoint
Key endpoints included pharmacokinetic analysis (tAb concentration, AUC, Cmax, Tmax, half-life) through Cycle 6, treatment immunogenicity (anti-HKT288 antibodies), and efficacy measures (ORR, DoR, PFS, DCR) assessed via serial tumor evaluations during treatment and 12-month follow-up, alongside retrospective CDH6 expression profiling.
Discovered Using Cell Line-derived Xenograft Model
Click To Hide/Show 2 Activity Data Related to This Level
Experiment 1 Reporting the Activity Date of This ADC [3]
Efficacy Data Tumor Growth Inhibition value (TGI) ≈ 90% High CDH6 expression (CDH6+++)
Method Description
CDH6-sulfo-DM4 induces efficient tumor cell killing in cell PDX models with CDH6 expression.
In Vivo Model Ovarian cancer CDX model
In Vitro Model Ovarian serous adenocarcinoma OVCAR-3 cells CVCL_0465
Experiment 2 Reporting the Activity Date of This ADC [3]
Efficacy Data Tumor Growth Inhibition value (TGI) ≈ 100% High CDH6 expression (CDH6+++)
Method Description
CDH6-sulfo-DM4 induces efficient tumor cell killing in cell PDX models with CDH6 expression.
In Vivo Model Ovarian cancer CDX model
In Vitro Model Ovarian serous adenocarcinoma OVCAR-3 cells CVCL_0465
References
Ref 1 A Phase I, Multicenter, Open-label Dose Escalation and Expansion Study of HKT288, Administered Intravenously in Adult Patients With Advanced Solid Tumors, Including Epithelial Ovarian Cancer and Renal Cell Carcinoma
Ref 2 A Phase 1 Study of a CDH6-Targeting Antibody-Drug Conjugate in Patients with Advanced Solid Tumors with Evaluation of Inflammatory and Neurological Adverse Events. Oncol Res Treat. 2021;44(10):547-556.
Ref 3 Discovery and Optimization of HKT288, a Cadherin-6-Targeting ADC for the Treatment of Ovarian and Renal Cancers. Cancer Discov. 2017 Sep;7(9):1030-1045.
Ref 4 HKT288 in Solid Tumors, Including Epithelial Ovarian Cancer and Renal Cell Carcinoma