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C4 Therapeutics Shows Promising T-Cell Biomarkers for Cemsidomide Trials

Sep 25, 2026, 7:49 AM EDT1 sourcesAI-analyzed

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Positive biomarker signals and safe dose confirmation raise likelihood of favorable clinical progression and potential accelerator for combination strategies; however, early-stage data and long timelines to mid-2027 keep upside contingent on translating signals to efficacy.

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New biomarker data from C4T's Phase 1 and Phase 1b trials show cemsidomide robustly activates T-cells and expands CD8+ populations, including with elranatamab. The 75 µg dose was deemed safe and the study advances to higher dose cohorts, with data expected mid-2027. If durable responses emerge, cemsidomide could become a backbone in myeloma regimens.

Cemsidomide with dexamethasone shows robust T-cell activation in RRMM Phase 1.
Phase 1b data indicate CD8+ T-cell expansion and reduced exhaustion with elranatamab.
75 µg dose cleared as safe; trial advancing to 100 µg and expansion cohorts; data mid-2027.
Data hint potential for cemsidomide as backbone therapy in immune-based myeloma regimens.
Near-term catalysts are safety/expansion progress; key readouts due mid-2027.

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C4 Therapeutics Shows Promising T-Cell Biomarkers for Cemsidomide Trials

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