FGFR2 overexpression

This study shows that FGFR2 expression was independently associated with improved DFS in PCC-GC. These findings suggest that FGFR2 may serve as a prognostic biomarker in patients with PCC-GC.

This study represents the largest prevalence assessment of FGFR2b overexpression in G/GEJC using a validated IHC assay. The observed estimates of 36.5% (any 2+/3+) and 16.6% (FGFR2b ≥10% 2+/3+) suggest that FGFR2b is prevalent in a meaningful proportion of patients with advanced G/GEJC.

Notably, 50.8% of cases exhibited concurrent FGFR2 amplification and overexpression, and all cases with FGFR2 gene deletion also demonstrated FGFR2 overexpression. These findings suggest that FGFR2 gene amplification and deletion may contribute to FGFR2 overexpression and play a significant role in the molecular pathogenesis of mandibular AM.

P1/2, N=0, Withdrawn, Centre Leon Berard | N=87 --> 0 | Not yet recruiting --> Withdrawn

FGFR2 is lowly expressed in DFU and can exert a protective effect by activating the PI3K/Akt pathway. It is a candidate diagnostic biomarker and potential therapeutic target for DFU.

This study provides a framework for selecting cell lines that are responsive to each of the 35 anticancer drugs and elucidating their underlying therapeutic mechanisms through follow-up studies. Ultimately, clinical studies are required to confirm the therapeutic efficacy of the selected drugs.

The primary endpoint is the objective response rate, which is assessed by a blinded independent central review. Translational research is planned to explore the predictive biomarkers and mechanisms of resistance to bemarituzumab by sequencing tumor DNA (PleSSiSion-Neo) and circulating tumor DNA (Guardant360), which are collected at multiple time points.

P1/2, N=260, Completed, Amgen | Active, not recruiting --> Completed

P2, N=0, Withdrawn, Institut Cancerologie de l'Ouest | N=49 --> 0 | Trial completion date: Jun 2034 --> Jan 2026 | Not yet recruiting --> Withdrawn | Trial primary completion date: Jun 2029 --> Jan 2026

P1/2, N=72, Active, not recruiting, Amgen | Trial completion date: Mar 2028 --> Aug 2026

FGFR2b expression exhibits substantial intratumoral heterogeneity in gastric cancer and may be linked to favorable outcomes in patients undergoing first-line ICI plus chemotherapy. Therefore, future studies should validate this finding, along with mechanistic investigations.

CLDN18.2 and FGFR2b were significantly associated with each other, suggesting a considerable overlap. This finding may have important clinical implications on the optimal treatment strategy for CLDN18.2-positive GC.