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Thursday, 05/23/2024 5:39:39 PM

Thursday, May 23, 2024 5:39:39 PM

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SNK02 has the potential to be a first-in-class cryopreserved allogeneic NK cell therapy for solid tumors that does not require lymphodepletion before administration, which may lead to better overall synergy in future combination regimens with immune checkpoint inhibitors.

In this Phase 1 trial, the best objective response of stable disease was demonstrated in 100% of patients that completed 8 treatment cycles of SNK02.

SNK02 was well tolerated as a monotherapy and appears to have some clinical activity against pretreated solid tumors despite the lack of lymphodepletion.

SANTA ANA, Calif., May 23, 2024 (GLOBE NEWSWIRE) -- NKGen Biotech, Inc. (Nasdaq: NKGN) (“NKGen” or the “Company”), a clinical-stage biotechnology company focused on the development and commercialization of innovative autologous, allogeneic and CAR-NK natural killer (“NK”) cell therapeutics, today announced an online publication, titled “Interim Analysis of a Phase I Study using Cryopreserved Non-genetically Modified Allogeneic Natural Killer Cells With Enhanced Cytotoxicity (SNK02) in Patients with Advanced Solid Tumors without Lymphodepletion” at the 2024 American Society of Clinical Oncology (“ASCO”) Annual Meeting to be held virtually and at the McCormick Place Convention Center in Chicago, Illinois from May 31–June 4, 2024.

This Phase 1 clinical trial is a multi-center, open-label study evaluating the safety and tolerability of SNK02 in participants with pathologically confirmed solid tumors refractory to standard of care therapy. The study drug, SNK02, is a first-in-kind, cryopreserved allogeneic non-genetically modified NK cell product with significant anti-tumor cytotoxicity and over 90% expression of CD16, NKG2D, NKp46, and DNAM-1, that can be consistently produced on a large commercial scale. SNK02 was administered as an intravenous infusion (IV), weekly for eight weeks in patients with advanced solid tumors. The starting dose was 6x109 SNK02 cells. We hypothesized that higher doses of SNK02 (to overcome autodigestion) could be delivered frequently without the need for lymphodepletion and that it might demonstrate activity against solid tumors that have failed multiple prior standard-of-care treatment options. The primary endpoint was safety based on adverse events (AEs), vitals, laboratory tests, and physical exams. Tolerability of SNK02 and maximum tolerated dose were also evaluated.

“Interim data from our Phase 1 clinical study utilizing our second NK cell therapy product, SNK02, demonstrated that the treatment was well-tolerated as a monotherapy in patients with solid tumors refractory to standard of care therapy,” said Paul Y. Song, MD, Chairman and CEO of NKGen. “We are particularly excited because SNK02 has the potential to be a first-in-class cryopreserved allogeneic NK cell therapy for solid tumors that does not require lymphodepletion before administration, which may lead to better overall synergy in future combination regimens especially with immune checkpoint inhibitors where a robust T-cell response is needed. Using our proprietary allogeneic manufacturing and cryopreservation processes, we are capable of producing hundreds of thousands of potential doses of enhanced NK cell therapies from materials collected from a single donor. Thus, our potential to treat a significant number of cancer patients with SNK02 is remarkably high. We are pleased to see such promising Phase 1 trial results for both of our unique cell therapy candidates: autologous SNK01 for neurodegenerative disease and allogeneic SNK02 for cancer.”

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