Therapeutic Products
In vivo efficacy evaluation of Claudin18.2 and CD47 bispecific antibody in mice
Zhang Rongjing, Huang Yingfeng
Published 2023-04-10
Cite as Int J Biologicals, 2023, 46(2): 65-70. DOI: 10.3760/cma.j.cn311962-20221018-00068
Abstract
ObjectiveTo evaluate the therapeutic effect of Claudin18.2 and CD47 bispecific antibody (BsAb) in mouse tumor models.
MethodsCB-17 SCID mice were inoculated with BxPC3-hClaudin18.2 pancreatic cancer cells or HT29-hClaudin18.2 colon cancer cells subcutaneously. The BsAb, anti-Claudin18.2 or anti-CD47 monoclonal antibodies (mAbs) were administered by tail intravenous injection and intraperitoneal injection alternately. Tumor volume and mass were monitored. The BsAb efficacy was evaluated according to tumor growth inhibition of tumor volume (TGItv) and weight (TGItw).
ResultsIn pancreatic cancer model, the TGItv values of low, moderate and high dosage BsAb groups were 47.12%, 85.90% and 86.48%, and TGItw values were 44.16%, 80.00% and 74.46%, respectively. In colon cancer model, the TGItv values of low, moderate and high dosage BsAb groups were 39.30%, 48.54% and 82.27%, and TGItw values were 23.29%, 31.53% and 73.46%, respectively. Under same dosage, the TGItv values of anti-Claudin18.2 mAb, anti-CD47 mAb and BsAb groups were 26.60%, 21.07% and 84.99%, and TGItw values were 20.59%, 16.30% and 78.67%, respectively.
ConclusionClaudin18.2 and CD47 BsAb can inhibit the growth of cancer cells effectively, with in vivo efficacy in mice significantly better than each mAb alone, which shows good therapeutic potential in cancer.
Key words:
Bispecific antibodies; Tumor growth inhibition of tumor volume; Tumor growth inhibition of tumor weight; In vivo efficacy
Contributor Information
Zhang Rongjing
Dragonboat Biopharmaceutical (Shanghai) Co., Ltd., Shanghai 201203, China
Huang Yingfeng
Dragonboat Biopharmaceutical (Shanghai) Co., Ltd., Shanghai 201203, China
School of Pharmacy, Shanghai Jiao Tong University, Shanghai 200240, China