Claudin18.2 Proteins

Claudin is a family of proteins first discovered by Furuse in 1998 , which contains at least 27 members. It's a type of four-pass transmembrane protein that expressed at the tight junction of epithelium and endothelium which is a component of tight junction strands that play critical roles in maintaining cell polarity and signal transductions. Claudin 18.2, a subtype of Claudin 18, is characterized by limited expression in normal differentiated gastric mucosal epithelial cells but aberrantly high expression in various malignant tumors, including gastric cancer, pancreatic cancer, cholangiocarcinoma, ovarian cancer, and lung cancer, making it an attractive target for immunotherapy. Thus it has emerged as an ideal target for immunotherapy including monoclonal antibody, bispecific antibody, ADC and CAR-T therapy.
Restricted by the surface area of the cell membrane and the potential cytotoxicity of overexpressed membrane proteins, the expression level of recombinant four-pass Claudin 18.2 proteins is much lower than that of soluble proteins. Furthermore, it is necessary to screen suitable detergents or lipids to maintain spatial conformation and protein activity in the process of extraction and purification. So that makes it very difficult to obtain Claudin 18.2 antigen with high purity, native conformation and activity, which seriously hinders the development of drugs and therapies targeting Claudin 18.2.
To solve the challenge of obtaining complete conformation of four-pass transmembrane protein Claudin 18.2,ACROBiosystems has successfully developed full-length Claudin 18.2-VLP, complete epitope Claudin 18.2-Detergent, and detergent-free Claudin 18.2-Nanodisc proteins by relying on the technology platforms of multi-pass transmembrane proteins. These products have been validated through ELISA/BLI/SPR to exhibit high biological activity, making them suitable for use in drug discovery and development. Meanwhile, we offer Claudin 18.2 Stable Cell Line and integrated SPR & BLI analytical service to meet the needs of drug development, assist drug clinical declaration.
Structure of Claudin 18.2 (AlphaFold structure prediction)

Product list

VLP Platform
Nanodisc Platform
Detergent Platform

Product feature

The following ELISA/SPR/BLI protocols are available for free.

Claudin 18.2-VLP
(CL2-H52P7CL2-HF218)
Claudin 18.2-VLP
Advantages
Full-length Claudin 18.2
Enhanced humoral and cellular immune responses
Optimal target presentation to APC and phage display because of its 100-300nm in size
Suitable for immunization/ELISA/SPR/BLI/cell-based assay /CAR detection
Claudin 18.2-Detergent
(CL2-H82E3CL2-H5587)
Nanodisc Platform
Advantages
Claudin 18.2 with complete conformation
Can be accurately quantified
High solubility in presence of DDM/CHS (DC-11)
Biotinylated Claudin 18.2 (CL2-H82E3) is available
Suitable for immunization/ELISA/SPR/BLI
Claudin 18.2-Nanodisc
(CL2-H85D4CL2-H5586)
Claudin 18.2-Nanodisc
Advantages
Full-length Claudin 18.2 are in a natural membrane environment retaining high biological activity
High hydrophilicity without detergent
Suitable for immunization/ELISA/SPR/BLI/cell experiment/CAR detection
Claudin 18.2-VLP
Correct assembly validated by SEM
Full-length Claudin 18.2-VLP (Cat. No.CL2-H52P7) has been observed under an electron microscope to ensure that it is assembled correctly.
CL2-H52P7
High bioactivity validated by ELISA
ELISA

Immobilized Human Claudin-18.2 Full Length Protein-VLP (Cat. No. CL2-H52P7) at 5 μg/mL (100 μL/well) can bind Monoclonal Anti-Chimeric Claudin-18.2 Antibody, Human IgG1 with a linear range of 0.2-3 ng/mL (QC tested).

High affinity validated by SPR
SPR

Human Claudin-18.2 Full Length Protein-VLP (Cat. No. CL2-H52P7) captured on CM5 Chip via Anti-Claudin-18.2 antibody can bind Anti-Claudin-18.2 antibody with an affinity constant of 0.374 nM as determined in a SPR assay (Biacore T200) (Routinely tested).

Suitable for CAR detection
Good bioactivity validation of CD20-DDM/CHS

2e5 of Anti-Claudin-18.2 CAR-293 cells were stained with 100 μL of 3 μg/mL of Fluorescent Human Claudin-18.2 Full Length Protein-VLP (Cat. No.CL2-HF218) and negative control protein respectively, FITC signals was used to evaluate the binding activity (Routinely tested).

Claudin 18.2-Detergent

High bioactivity validated by ELISA
Good bioactivity validation of full-length CD20-DDM/CHS

Immobilized Human Claudin-18.2, His,Twin-Strep Tag (Cat. No. CL2-H5587) at 2 μg/mL (100 μL/well) can bind Monoclonal Anti-Chimeric Claudin-18.2 Antibody, Human IgG1 with a linear range of 0.1-2 ng/mL (QC tested).

High affinity validated by SPR
Good bioactivity validation of CD20-DDM/CHS

Anti-Claudin-18.2 mAb captured on CM5 chip via anti-Human IgG (Fc) antibody can bind Human Claudin-18.2, His,Twin-Strep Tag (Cat. No. CL2-H5587) with an affinity constant of 6.72 nM as determined in a SPR assay (in presence of DDM and CHS) (Biacore T200) (Routinely tested).

Claudin 18.2-Nanodisc

High bioactivity validated by ELISA
High bioactivity validated by ELISA

Immobilized Biotinylated Human Claudin-18.2 Protein, His,Avitag&Flag Tag (Cat. No. CL2-H85D4) at 1 μg/mL (100 μL/well) on streptavidin (Cat. No. STN-N5116) precoated (0.5 μg/well) plate can bind Monoclonal Anti-Chimeric Claudin-18.2 Antibody, Human IgG1 with a linear range of 0.1-2 ng/mL (QC tested).

High affinity validated by SPR
High affinity validated by SPR

Monoclonal Anti-Chimeric Claudin-18.2 Antibody, Human IgG1 captured on Protein A Chip can bind Human / Cynomolgus Claudin-18.2, His,Twin-Strep Tag (Cat. No. CL2-H5586) with an affinity constant of 12.6 nM as determined in SPR assay (Biacore 8K) (Routinely tested).

Clinical drug information

English NameResearch CodeHighest Development StageCompanyIndicationClinical Trial
89Zr-NY00589Zr-NY005ClinicalWuxi Nuoyu Pharmaceutical Technology Co LtdPancreatic Neoplasms; Solid tumours; Stomach Neoplasms
Details
CTB-001(Nanjing Bioheng)CTB-001; CTB001ClinicalNanjing Bioheng Biotech Co LtdPancreatic Neoplasms; Stomach Neoplasms
Details
124I-18B10124I-18B10; 124-I-18-B-10ClinicalBeijing Cancer Hospital, Transcenta Holding LtdGastrointestinal Neoplasms
Details
CLDN18.2 UCAR-T cell therapyCLDN18.2 UCAR-TClinicalT-Maximum Pharmaceutical (Suzhou) Co LtdStomach Neoplasms
Details
XKDCT-086XKDCT086; XKDCT-086ClinicalThe Affiliated Hospital Of Qingdao UniversityStomach Neoplasms
Details
LCAR-C18S CAR-T cell therapy (Legend)LB-1908; LCAR-C18S; LCAR-C-18-SPhase 1 ClinicalEsophageal Neoplasms; Gastroesophageal Junction Neoplasms; Pancreatic Neoplasms; Solid tumours; Stomach Neoplasms
Details
HBM-1029HBM-1029; HBM1029Phase 1 ClinicalHarbour BiomedEsophageal Neoplasms; Solid tumours; Stomach Neoplasms
Details
LM-102LM-102Phase 1 ClinicalLaNova Medicines LtdBiliary Tract Neoplasms; Esophageal Neoplasms; Pancreatic Neoplasms; Solid tumours; Stomach Neoplasms
Details
QL-1779QL-1779; QL1779Phase 1 ClinicalQilu Pharmaceutical Co LtdSolid tumours
Details
IBI-360IBI-360Phase 1 ClinicalNeoplasms; Solid tumours
Details
FL-301NBL-015; FL-301Phase 1 ClinicalNovarock Biotherapeutics LtdPancreatic Neoplasms; Solid tumours; Stomach Neoplasms
Details
IBI-389IBI-389Phase 1 ClinicalEsophageal Neoplasms; Neoplasms; Pancreatic Neoplasms; Solid tumours; Stomach Neoplasms
Details
CLDN 18.2 CAR-T cell therapy (Shanghai Longyao)LY-011Phase 1 ClinicalShanghai Longyao Biological Technology Co LtdPancreatic Neoplasms; Stomach Neoplasms
Details
BA-1105BA1105; BA-1105Phase 1 ClinicalShandong Boan Biotechnology Co LtdEsophageal Neoplasms; Pancreatic Neoplasms; Solid tumours; Stomach Neoplasms
Details
SG-1906SG-1906; SG1906Phase 1 ClinicalHangzhou Shangjian Biotechnology Co LtdNeoplasms; Solid tumours
Details
DR-30303DR-30303Phase 1 ClinicalZhejiang Doer Biologics CorpSolid tumours
Details
BC-007 (Dragonboat Biopharmaceutical)BC-007Phase 1 ClinicalDragonboat BiopharmaceuticalNeoplasms; Solid tumours
Details
BC-008BC-008Phase 1 ClinicalDragonboat BiopharmaceuticalNeoplasms; Solid tumours
Details
TORL-2-307-ADCTORL-2-307-ADCPhase 1 ClinicalTorl Biotherapeutics LLCGastroesophageal Junction Neoplasms; Pancreatic Neoplasms; Solid tumours; Stomach Neoplasms
Details
TORL-2-307-MABTORL-2-307-MABPhase 1 ClinicalTorl Biotherapeutics LLCGastroesophageal Junction Neoplasms; Pancreatic Neoplasms; Solid tumours; Stomach Neoplasms
Details
IBI-345IBI-345Phase 1 ClinicalSolid tumours
Details
RD-07RD-07Phase 1 ClinicalPeking UniversitySolid tumours
Details
PM-3023PM-3023Phase 1 ClinicalSolid tumours
Details
HEC-016HEC-016Phase 1 ClinicalPeople Hospital Of Luohu,ShenzhenEsophageal Neoplasms; Pancreatic Neoplasms; Stomach Neoplasms
Details
ASP-2138ASP-2138Phase 1 ClinicalAstellas Pharma Global Development Inc, Xencor IncCarcinoma, Pancreatic Ductal; Esophageal Neoplasms; Gastroesophageal Junction Neoplasms; Pancreatic Neoplasms; Stomach Neoplasms
Details
CT-048CT-048; KJ-C1807; KJ-C-1807Phase 1 ClinicalCarsgen Biomedicine (Shanghai) Co LtdGastroesophageal Junction Neoplasms; Pancreatic Neoplasms; Stomach Neoplasms
Details
Ori-C-613Ori-C-613; OriC-613; Ori-C613Phase 1 ClinicalOriCell Therapeutics Co LtdSolid tumours
Details
LB-1904LB-1904Phase 1 ClinicalStomach Neoplasms
Details
RB-0011RB0011; RB-0011Phase 1 ClinicalRuiyang (Suzhou) Biological Technology Co LtdSolid tumours
Details
BA-1301BA-1301; BA1301Phase 1 ClinicalShandong Boan Biotechnology Co LtdEsophageal Neoplasms; Gastroesophageal Junction Neoplasms; Pancreatic Neoplasms; Solid tumours; Stomach Neoplasms
Details
BIO-008BIO-008Phase 1 ClinicalShijiazhuang Yiling Pharmaceutical Co LtdSolid tumours
Details
TQB-2103TQB2103; TQB-2103Phase 1 ClinicalNanjing Shunxin Pharmaceuticals Co Ltd Of Chiatai Tianqing Pharmaceutical GroupNeoplasms
Details
AHT-101AHT-101; AHT101Phase 1 ClinicalGuangxi Lugang Biomedical Technology Co LtdSolid tumours
Details
AK-132AK132; AK-132Phase 1 ClinicalNeoplasms; Solid tumours
Details
68Ga-PMD22(Peking Union Medical College Hospital)Phase 1 ClinicalPeking Union Medical College HospitalGastrointestinal Neoplasms
Details
GC-506GC506; GC-506Phase 1 ClinicalGracell Biotechnologies (Shanghai) Co LtdGastroesophageal Junction Neoplasms; Solid tumours; Stomach Neoplasms
Details
AZD-6422AZD6422; AZD-6422Phase 1 ClinicalAstrazeneca PlcGastrointestinal Neoplasms
Details
AHT-102AHT102; AHT-102Phase 1 ClinicalGuangxi Lugang Biomedical Technology Co LtdSolid tumours
Details
BL-M05D1BL-M05D1; BLM05D1Phase 1 ClinicalSichuan Baili Pharmaceutical Co Ltd, SystImmuneBiliary Tract Neoplasms; Carcinoma, Pancreatic Ductal; Esophageal adenocarcinoma; Solid tumours; Stomach Neoplasms
Details
LNF-2007LNF-2007; LNF2007Phase 1 ClinicalShandong New Time Pharmaceutical Co LtdSolid tumours
Details
Cord Blood-Derived CAR-NK Cells therapy (Rongu Biotechnology)CB CAR-NK182; RG-CLDN18.2Phase 1 ClinicalHangzhou Rongu Biotechnology Co LtdPancreatic Neoplasms; Stomach Neoplasms
Details
SPX-102SPX-102Phase 1 ClinicalSparx Therapeutics IncNeoplasms
Details
HD-004HD004; HD-004Phase 1 ClinicalHuadao (Shanghai) Biopharma Co LtdSolid tumours
Details
[68Ga]Ga-NODAGA-SNA01468Ga-SNA014; [68Ga]Ga-NODAGA-SNA014; SNA-014Phase 1 ClinicalSmartnuclide BiopharmaAdenocarcinoma; Pancreatic Neoplasms
Details
SIBP-A18SIBPA18; SIBP-A18Phase 1 ClinicalShanghai Institute of Biological Products Co LtdSolid tumours
Details
CT-225XKDCT225; XKDCT-225; CT225Phase 1 ClinicalShenzhen Celconta Life Science Co LtdSolid tumours
Details
Claudin18.2-targeted CAR-T Cells therapy (Second Affiliated Hospital School Of Zhejiang University School Of Medicine)Phase 1 ClinicalSecond Affiliated Hospital School Of Zhejiang University School Of MedicineColorectal Neoplasms
Details
Claudin18.2-targeted CAR-DCs therapy (Second Affiliated Hospital School Of Zhejiang University School Of Medicine)Phase 1 ClinicalSecond Affiliated Hospital School Of Zhejiang University School Of MedicineColorectal Neoplasms
Details
GresonitamabAMG-910Phase 1 ClinicalAmgen IncAdenocarcinoma; Esophageal Neoplasms; Stomach Neoplasms
Details
Claudin18.2 CAR-T cell therapy (Ucello Therapeutics)Phase 1 ClinicalUcello Therapeutics Co LtdSolid tumours
Details
CBG-131CBG-131; CBG131Phase 1 ClinicalCarbiogene Therapeutics Co LtdPancreatic Neoplasms; Stomach Neoplasms
Details
Claudin18.2 Targeted Activated Dendritic Cells therapy (Frontiergate Biopharm)Phase 1 ClinicalFrontiergate Biopharm (Hainan) Co LtdPancreatic Neoplasms
Details
Claudin18.2 Targeted CAR-T Cells therapy (Frontiergate Biopharm)Phase 1 ClinicalFrontiergate Biopharm (Hainan) Co LtdPancreatic Neoplasms
Details
KD-496KD-496(4th); KD-496Phase 1 ClinicalNanjing Kaidi Medical Technology Co LtdNeoplasms; Pancreatic Neoplasms; Solid tumours; Stomach Neoplasms
Details
Recombinant humanized anti-Claudin 18.2 monoclonal antibody (CARsgen)AB-011Phase 1 ClinicalCarsgen Biomedicine (Shanghai) Co Ltd, Kaixing Life Technology (Shanghai) Co LtdEsophageal Neoplasms; Pancreatic Neoplasms; Solid tumours; Stomach Neoplasms
Details
RC-118RC-118; YH005 ADCPhase 2 ClinicalGastroesophageal Junction Neoplasms; Solid tumours; Stomach Neoplasms
Details
Recombinant humanized monoclonal antibody MIL93(Mabworks)MIL-93Phase 2 ClinicalBeijing Mabworks Biotech Co LtdGastroesophageal Junction Neoplasms; Neoplasms; Pancreatic Neoplasms; Solid tumours; Stomach Neoplasms
Details
Q-1802Q-1802Phase 2 ClinicalQure Biotechnology (Shanghai) Co LtdEsophageal Neoplasms; Gastrointestinal Neoplasms; Solid tumours
Details
GivastomigTJ-CD4B; ABL-111; TJ-CLDN4B; TJ-033721; TJ-CD4B/ABL111Phase 2 ClinicalI-Mab Biopharma Co LtdBiliary Tract Neoplasms; Carcinoma, Pancreatic Ductal; Esophageal adenocarcinoma; Esophageal Neoplasms; Gastroesophageal Junction Neoplasms; Neoplasm Metastasis; Neoplasms; Solid tumours; Stomach Neoplasms
Details
SOT-102SOT-102; SOT102; SO-N102Phase 2 ClinicalSotio Biotech AGPancreatic Neoplasms; Stomach Neoplasms
Details
ATG-022ATG-022; ATN-022Phase 2 ClinicalAntengene Corporation Co LtdGastroesophageal Junction Neoplasms; Solid tumours; Stomach Neoplasms
Details
SKB-315SKB-315; SKB315; MK1200; MK-1200Phase 2 ClinicalSichuan Kelun-Biotech Biopharmaceutical Co LtdEsophageal Neoplasms; Solid tumours; Stomach Neoplasms
Details
SpevatamigPT-886; PT886Phase 2 ClinicalPhanes Therapeutics IncBiliary Tract Neoplasms; Carcinoma, Pancreatic Ductal; Esophageal Neoplasms; Gastroesophageal Junction Neoplasms; Pancreatic Neoplasms; Solid tumours; Stomach Neoplasms
Details
PM-1032PM1032; PM-1032Phase 2 ClinicalShanghai Genechem Co LtdNeoplasms; Pancreatic Neoplasms
Details
LCB-02ALCB-02APhase 2 ClinicalLegochem Biosciences IncHematologic Neoplasms; Solid tumours
Details
BDC-4182BD-4182; BDC-4182Phase 2 ClinicalBolt Biotherapeutics IncAdenocarcinoma; Esophageal Neoplasms; Neoplasms; Stomach Neoplasms
Details
AZD-4360AZD4360; AZD-4360Phase 2 ClinicalAstrazeneca AbBiliary Tract Neoplasms; Carcinoma, Pancreatic Ductal; Gastroesophageal Junction Neoplasms; Solid tumours; Stomach Neoplasms
Details
Claudin18.2 targeting CAR-T cell therapy (Essen Biotech)Phase 2 ClinicalEssen BiotechPancreatic Neoplasms
Details
EB-DNK102EB-DNK102Phase 2 ClinicalBeijing BiotechCarcinoma, Pancreatic Ductal
Details
HBM-7022HBM-7022; AZD-5863Phase 2 ClinicalHarbour BiomedCarcinoma, Pancreatic Ductal; Esophageal adenocarcinoma; Esophageal Neoplasms; Gastroesophageal Junction Neoplasms; Neoplasms; Pancreatic Neoplasms; Stomach Neoplasms
Details
CLDN18.2-TAC T cells TherapyCLDN-18.2-TAC T cells; CLDN18.2-TAC T cellsPhase 2 ClinicalTriumvira Immunologics IncSolid tumours; Stomach Neoplasms
Details
KD-182KD-182Phase 2 ClinicalNanjing Kaidi Medical Technology Co LtdCarcinoma, Pancreatic Ductal; Stomach Neoplasms
Details
ASKB-589ASKB-589Phase 3 ClinicalAskGene Pharma Inc, Jiangsu Aosaikang Pharmaceutical Co LtdAdenocarcinoma; Esophageal Neoplasms; Gastroesophageal Junction Neoplasms; Pancreatic Neoplasms; Solid tumours; Stomach Neoplasms
Details
Sonesitatug VedotinCMG-901; CMG901; AZD-0901; AZD0901Phase 3 ClinicalKeymed Biosciences Co LtdBiliary Tract Neoplasms; Carcinoma, Pancreatic Ductal; Esophageal Neoplasms; Gastroesophageal Junction Neoplasms; Pancreatic Neoplasms; Solid tumours; Stomach Neoplasms
Details
FG-M-108FG-M-108; M108; M-108Phase 3 ClinicalFutureGen Biopharm (Beijing) Co LtdEsophageal Neoplasms; Gastroesophageal Junction Neoplasms; Pancreatic Neoplasms; Solid tumours; Stomach Neoplasms
Details
Garetatug RezetecanSHR-A-1904; SHR-A1904Phase 3 ClinicalShanghai Hengrui Pharmaceutical Co LtdBile Duct Neoplasms; Biliary Tract Neoplasms; Esophageal Neoplasms; Gastroesophageal Junction Neoplasms; Lymphangioma, Cystic; Pancreatic Neoplasms; Solid tumours; Stomach Neoplasms
Details
SYSA-1801SYSA1801; CPO-102; EO-3021; SYSA-1801Phase 3 ClinicalCSPC Zhongqi Pharmaceutical Technology (Shijiazhuang) Co LtdDigestive System Neoplasms; Esophageal Neoplasms; Gastroesophageal Junction Neoplasms; Gastrointestinal Neoplasms; Neoplasms; Pancreatic Neoplasms; Solid tumours; Stomach Neoplasms
Details
QLS-31905QLS-31905Phase 3 ClinicalQilu Pharmaceutical Co LtdBile Duct Neoplasms; Esophageal Neoplasms; Gastroesophageal Junction Neoplasms; Neoplasms; Pancreatic Neoplasms; Solid tumours; Stomach Neoplasms
Details
Tecotabart vedotinTPX-4589; BMS-986476; LM-302Phase 3 ClinicalLaNova Medicines LtdAdenocarcinoma; Digestive System Neoplasms; Esophageal Neoplasms; Gastroesophageal Junction Neoplasms; Gastrointestinal Neoplasms; Neoplasms; Pancreatic Neoplasms; Solid tumours; Stomach Neoplasms
Details
JS-107JS-107; JS107Phase 3 ClinicalShanghai Junshi Biosciences Co LtdAdenocarcinoma; Gastroesophageal Junction Neoplasms; Pancreatic Neoplasms; Solid tumours; Stomach Neoplasms
Details
LB-4330LB-4330; Bis-2Phase 3 ClinicalL&L Biopharma Co LtdSolid tumours; Uterine Cervical Neoplasms
Details
Arcotatug tavatecanIBI-343; IBI343Phase 3 ClinicalInnovent Biologics(Suzhou) Co LtdAdenocarcinoma; Carcinoma, Pancreatic Ductal; Esophageal Neoplasms; Gastroesophageal Junction Neoplasms; Neoplasms; Pancreatic Neoplasms; Solid tumours; Stomach Neoplasms
Details
IMC-002 (Suzhou Immunofoco)IMC-002Phase 3 ClinicalSuzhou Immunofoco Biotechnology Co LtdDigestive System Neoplasms; Gastroesophageal Junction Neoplasms; Ovarian Neoplasms; Pancreatic Neoplasms; Stomach Neoplasms
Details
XNW-27011XNW-27011Phase 3 ClinicalEvopoint Biosciences Co LtdAdenocarcinoma; Biliary Tract Neoplasms; Carcinoma, Non-Small-Cell Lung; Colorectal Neoplasms; Gastroesophageal Junction Neoplasms; Ovarian Neoplasms; Solid tumours; Stomach Neoplasms
Details
OsemitamabMSB-018; TST-001Phase 3 ClinicalHJB (Hangzhou) Co Ltd, Suzhou Transcenta Therapeutics Co LtdBiliary Tract Neoplasms; Esophageal Neoplasms; Gallbladder Neoplasms; Gastroesophageal Junction Neoplasms; Lung Neoplasms; Neoplasms; Pancreatic Neoplasms; Solid tumours; Stomach Neoplasms
Details

References

Jumper J, et al. Highly accurate protein structure prediction with AlphaFold. Nature (2021)

Furuse M, et al. Claudin-1 and -2: novel integral membrane proteins localizing at tight junctions with no sequence similarity to occludin[J]. J Cell Biol(1998)

  • Introduction
  • Product list
  • Product feature
  • Clinical drug information
  • References
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