Linker Information

General Information of This Linker

Linker ID	LIN0JETYX
Linker Name	2-Aminobenzamide oxime
Linker Type	Bioorthogonal reaction linker
Antibody-Linker Relation	Cleavable
Structure
Structure	3D MOL		2D MOL
Formula	C7H9N3O
Isosmiles	C1=CC=C(C(=C1)/C(=N/O)/N)N
PubChem CID	9628840
InChI	InChI=1S/C7H9N3O/c8-6-4-2-1-3-5(6)7(9)10-11/h1-4,11H,8H2,(H2,9,10)
InChIKey	CFZHYRNQLHEHJS-UHFFFAOYSA-N
IUPAC Name	2-amino-N'-hydroxybenzenecarboximidamide
Pharmaceutical Properties	Molecule Weight	151.17	Polar area	84.6
	Complexity	158	xlogp Value	0.6
	Heavy Count	11	Rot Bonds	1
	Hbond acc	3	Hbond Donor	3

Each Antibody-drug Conjugate Related to This Linker

Full Information of The Activity Data of The ADC(s) Related to This Linker

HER2-gsADC-48 [Investigative]

ADC Info

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					[1]
Efficacy Data	Tumor Growth Inhibition value (TGI)	≈ 56.18% (Day 28)	Positive HER2 expression (HER2+++/++)
Method Description	To further evaluate the gsADCs, we determined the in vivo tumor-inhibitory activity in an NCI-N87 nude mice xenograft model. The mice were randomly grouped into 10 groups (n = 5), including a PBS control group, when the tumors grew to 200 mm³. The experimental groups were 3.0 mg/kg gsADCs q3d.
In Vivo Model	NCI-N87 CDX model
In Vitro Model	Gastric tubular adenocarcinoma	NCI-N87 cells		CVCL_1603
Experiment 2 Reporting the Activity Date of This ADC					[1]
Efficacy Data	Tumor Growth Inhibition value (TGI)	≈ 98.50% (Day 57)	Positive HER2 expression (HER2+++/++)
Method Description	To further evaluate the gsADCs, we determined the in vivo tumor-inhibitory activity in an NCI-N87 nude mice xenograft model. The mice were randomly grouped into 10 groups (n = 5), including a PBS control group, when the tumors grew to 200 mm³. The experimental groups were 3.0 mg/kg gsADCs q3d.
In Vivo Model	NCI-N87 CDX model
In Vitro Model	Gastric tubular adenocarcinoma	NCI-N87 cells		CVCL_1603

Revealed Based on the Cell Line Data

Click To Hide/Show 3 Activity Data Related to This Level

Experiment 1 Reporting the Activity Date of This ADC					[1]
Efficacy Data	Half Maximal Inhibitory Concentration (IC50)	0.08 nM	Positive HER2 expression (HER2+++/++)
Method Description	Cells were cultured in a 10% fetal bovine serum (FBS)-containing RPMI 1640 medium and were planted into 96-well plates with 6000 cells per well. The plates were incubated overnight at 37°C in a 5% CO₂ cell incubator.
In Vitro Model	Breast adenocarcinoma	SK-BR-3 cells		CVCL_0033
Experiment 2 Reporting the Activity Date of This ADC					[1]
Efficacy Data	Half Maximal Inhibitory Concentration (IC50)	0.09 nM	Positive HER2 expression (HER2+++/++)
Method Description	Cells were cultured in a 10% fetal bovine serum (FBS)-containing RPMI 1640 medium and were planted into 96-well plates with 6000 cells per well. The plates were incubated overnight at 37°C in a 5% CO₂ cell incubator.
In Vitro Model	Gastric tubular adenocarcinoma	NCI-N87 cells		CVCL_1603
Experiment 3 Reporting the Activity Date of This ADC					[1]
Efficacy Data	Half Maximal Inhibitory Concentration (IC50)	> 66.00 nM	Negative HER2 expression (HER2 -)
Method Description	Cells were cultured in a 10% fetal bovine serum (FBS)-containing RPMI 1640 medium and were planted into 96-well plates with 6000 cells per well. The plates were incubated overnight at 37°C in a 5% CO₂ cell incubator.
In Vitro Model	Breast adenocarcinoma	MDA-MB-231 cells		CVCL_0062

HER2-gsADC-2 [Investigative]

ADC Info

Revealed Based on the Cell Line Data

Click To Hide/Show 3 Activity Data Related to This Level

Experiment 1 Reporting the Activity Date of This ADC					[1]
Efficacy Data	Half Maximal Inhibitory Concentration (IC50)	0.03 nM	Positive HER2 expression (HER2+++/++)
Method Description	Cells were cultured in a 10% fetal bovine serum (FBS)-containing RPMI 1640 medium and were planted into 96-well plates with 6000 cells per well. The plates were incubated overnight at 37°C in a 5% CO₂ cell incubator.
In Vitro Model	Gastric tubular adenocarcinoma	NCI-N87 cells		CVCL_1603
Experiment 2 Reporting the Activity Date of This ADC					[1]
Efficacy Data	Half Maximal Inhibitory Concentration (IC50)	0.11 nM	Positive HER2 expression (HER2+++/++)
Method Description	Cells were cultured in a 10% fetal bovine serum (FBS)-containing RPMI 1640 medium and were planted into 96-well plates with 6000 cells per well. The plates were incubated overnight at 37°C in a 5% CO₂ cell incubator.
In Vitro Model	Breast adenocarcinoma	SK-BR-3 cells		CVCL_0033
Experiment 3 Reporting the Activity Date of This ADC					[1]
Efficacy Data	Half Maximal Inhibitory Concentration (IC50)	> 66.00 nM	Negative HER2 expression (HER2 -)
Method Description	Cells were cultured in a 10% fetal bovine serum (FBS)-containing RPMI 1640 medium and were planted into 96-well plates with 6000 cells per well. The plates were incubated overnight at 37°C in a 5% CO₂ cell incubator.
In Vitro Model	Breast adenocarcinoma	MDA-MB-231 cells		CVCL_0062

HER2-gsADC-19 [Investigative]

ADC Info

Revealed Based on the Cell Line Data

Click To Hide/Show 3 Activity Data Related to This Level

Experiment 1 Reporting the Activity Date of This ADC					[1]
Efficacy Data	Half Maximal Inhibitory Concentration (IC50)	0.07 nM	Positive HER2 expression (HER2+++/++)
Method Description	Cells were cultured in a 10% fetal bovine serum (FBS)-containing RPMI 1640 medium and were planted into 96-well plates with 6000 cells per well. The plates were incubated overnight at 37°C in a 5% CO₂ cell incubator.
In Vitro Model	Breast adenocarcinoma	SK-BR-3 cells		CVCL_0033
Experiment 2 Reporting the Activity Date of This ADC					[1]
Efficacy Data	Half Maximal Inhibitory Concentration (IC50)	> 66.00 nM	Positive HER2 expression (HER2+++/++)
Method Description	Cells were cultured in a 10% fetal bovine serum (FBS)-containing RPMI 1640 medium and were planted into 96-well plates with 6000 cells per well. The plates were incubated overnight at 37°C in a 5% CO₂ cell incubator.
In Vitro Model	Gastric tubular adenocarcinoma	NCI-N87 cells		CVCL_1603
Experiment 3 Reporting the Activity Date of This ADC					[1]
Efficacy Data	Half Maximal Inhibitory Concentration (IC50)	> 66.00 nM	Negative HER2 expression (HER2 -)
Method Description	Cells were cultured in a 10% fetal bovine serum (FBS)-containing RPMI 1640 medium and were planted into 96-well plates with 6000 cells per well. The plates were incubated overnight at 37°C in a 5% CO₂ cell incubator.
In Vitro Model	Breast adenocarcinoma	MDA-MB-231 cells		CVCL_0062

References

Ref 1	Hiding Payload Inside the IgG Fc Cavity Significantly Enhances the Therapeutic Index of Antibody-Drug Conjugates. J Med Chem. 2023 Jan 12;66(1):1011-1026. doi: 10.1021/acs.jmedchem.2c01812. Epub 2022 Dec 30.