MHC Class II blockade lowered the ability of bone marrow to boost tumor growth, and reduced the ability of valemetostat with anti-PD1 to reduce tumoroid growth. Patient samples revealed a strong negative correlation between EZH2 and MHC Class II, suggesting that targeting EZH2 activity could lead to marked increase in MHC Class II and improve treatment responses in lung squamous cell carcinomas.

Valemetostat, which inhibits EZH1/2, as well as tazemetostat in combination with other drugs have been subject of recent research. The purpose of this article is to review the role of EZH2 in normal B cell differentiation and in the pathogenesis of B-Cell lymphomas.

P1, N=60, Recruiting, Daiichi Sankyo | N=13 --> 60

P1, N=100, Active, not recruiting, Daiichi Sankyo Co., Ltd. | Trial completion date: Dec 2026 --> Dec 2027

Pharmacological inhibition of EZH2 using DS-3201 reproduced some of the molecular effects of viral infection, including increased mutp53 stability...Indeed, the inhibition of SIRT1 with EX-527 reversed mutp53 accumulation but restored c-Myc expression and increased extracellular IL-6 release...These results establish a mechanistic link between viral infection, epigenetic remodeling, and oncogenic dependency. They also suggest that targeting IL-6 signaling could represent a therapeutic vulnerability in HHV-6A-associated thyroid cancer, particularly in combination with SIRT1 inhibitors.

P2, N=900, Recruiting, Gustave Roussy, Cancer Campus, Grand Paris

P1/2, N=165, Recruiting, Dizal Pharmaceuticals | Not yet recruiting --> Recruiting

P1/2, N=188, Recruiting, Novartis Pharmaceuticals

P1/2, N=165, Not yet recruiting, Dizal Pharmaceuticals

An 80-year-old woman with relapsed nodal T-follicular helper cell lymphoma, not otherwise specified, developed severe watery diarrhea during valemetostat therapy...To the best of our knowledge, this is the first reported case of enhancer of zeste homolog 1 and 2 (EZH1/2) inhibitor-induced colitis. EZH1/2 inhibition may lead to T cell-mediated intestinal injury through epigenetic dysregulation; therefore, patients receiving EZH1/2 inhibitors who develop persistent diarrhea should undergo early endoscopic and histological evaluations.

P1, N=4, Not yet recruiting, Daiichi Sankyo Inc.

At the last follow-up, four patients were alive without disease, four were alive with disease, and three died due to progressive disease. Hence, valemetostat is a promising salvage therapy for relapsed adult T-cell leukemia/lymphoma after allo-HCT.