SUZHOU, China, Nov. 10, 2022 /PRNewswire/ -- Transcenta Holding Limited ("Transcenta") (HKEX: 06628), a clinical stage biopharmaceutical company with fully-integrated capabilities in discovery, research, development and manufacturing of antibody-based therapeutics, announces that it has presented two scientific posters at the 37th Society for Immunotherapy of Cancer's (SITC) Annual Meeting in Boston, MA, November 8-12, 2022. One related to TST001 (Osemitamab),
A total of 300 G/GEJ resected adenocarcinoma tissue samples were assessed using Transcenta's proprietary Claudin18.2 specific antibody 14G11 and commercial kit PD-L1 IHC 28-8 pharmDx. Claudin18.2 staining in ≥ 10% of the tumor cells at 1+ or above intensity was present in 216 (72%) tissue samples tested. For PD-L1 expression, 51 (17%) had PD-L1 CPS ≥ 5. About 19% (n=41/216) of the Claudin18.2 positive samples also showed PD-L1 CPS ≥ 5. No correlation between the two markers expression was observed.
TST005 is a novel bi-functional fusion protein combining a high affinity PD-L1 monoclonal antibody (mAb) in a fragment crystallizable (Fc) silenced immunoglobulin G1 (IgG1) backbone and a differentiated transforming growth factor beta (TGF‑β) trap with improved stability. This study investigated the safety, tolerability and preliminary anti-tumor activity of TST005 in solid tumors. This study is ongoing at 4 sites in the US and China. As of Aug 24, 2022, the first three dose cohorts have been completed and no DLT was observed.
The full text of posters is available on Transcenta's website: https://www.transcenta.com/ About TST001 (Osemitamab)
TST001 (Osemitamab) is a high affinity humanized anti-Claudin18.2 monoclonal antibody with enhanced antibody-dependent cellular cytotoxicity ("ADCC") and complement-dependent cytotoxicity ("CDC") activities and potent anti-tumor activities in tumor xenograft models. TST001 (Osemitamab) is the second most advanced Claudin18.2 targeting antibody being developed globally. TST001 (Osemitamab) is generated using Transcenta's Immune Tolerance Breaking Technology (IMTB) platform. TST001 (Osemitamab) kills Claudin18.2 expressing tumor cells by mechanisms of ADCC and CDC. Leveraging advanced bioprocessing technology, the fucose content of TST001 (Osemitamab) was significantly reduced during the production, which further enhanced NK cells mediated ADCC activity of TST001 (Osemitamab). Clinical trials for TST001 (Osemitamab) are ongoing in the U.S. and China (NCT04396821, NCT04495296/CTR20201281). TST001 (Osemitamab) was granted Orphan Drug Designation in the U.S. by FDA for the treatment of patients with gastric or gastroesophageal junction (G/GEJ) cancer. Transcenta (HKEX: 06628) is a clinical stage biopharmaceutical company with fully integrated capabilities in antibody-based biotherapeutics discovery, research, development and manufacturing. Transcenta has established global footprint, with Headquarters and Discovery, Clinical and Translational Research Center in Suzhou, Process and Product Development Center and Manufacturing Facility in Hangzhou, and Clinical Development Centers in Princeton, US and in Beijing, Shanghai and Guangzhou of China, and External Partnering Center in Boston and Los Angeles, US. Transcenta has also initiated the construction of the Group Headquarters and the second high-end biopharmaceutical facility with ICB as its core technology in Suzhou Industrial Park. Transcenta is developing ten therapeutic antibody molecules for oncology and selected non-oncology indications including bone and kidney disorders. For more information, please visit www.transcenta.com and https://www.linkedin.com/company/transcenta.
Forward-Looking Statements
This news release may contain certain forward-looking statements that are, by their nature, subject to significant risks and uncertainties. The words "anticipate", "believe", "estimate", "expect", "intend" and similar expressions, as they relate to Transcenta, are intended to identify certain of such forward-looking statements. Transcenta does not intend to update these forward-looking statements regularly. These forward-looking statements are based on the existing beliefs, assumptions, expectations, estimates, projections and understandings of the management of Transcenta with respect to future events at the time these statements are made. These statements are not a guarantee of future developments and are subject to risks, uncertainties and other factors, some of which are beyond Transcenta's control and are difficult to predict. Consequently, actual results may differ materially from information contained in the forward-looking statements as a result of future changes or developments in our business, Transcenta's competitive environment and political, economic, legal and social conditions. Transcenta, the Directors and the employees of Transcenta assume (a) no obligation to correct or update the forward-looking statements contained in this site; and (b) no liability in the event that any of the forward-looking statements does not materialize or turn out to be incorrect.