Resumen
Recently, the combination of chemotherapy plus nivolumab (chemo-immunotherapy) has become the standard of care for advanced-stage gastric cancer (GC) patients. However, despite its efficacy, up to 40% of patients do not respond to these treatments. Our study sought to identify variations in gene expression associated with primary resistance to chemo-immunotherapy. Diagnostic endoscopic biopsies were retrospectively obtained from advanced GC patients previously categorized as responders (R) or non-responders (NR). Thirty-four tumor biopsies (R: n = 16, NR: n = 18) were analyzed by 3′ massive analysis of cDNA ends (3′MACE). We found >30 differentially expressed genes between R and NRs. Subsequent pathway enrichment analyses demonstrated that angiogenesis and the Wnt-β-catenin signaling pathway were enriched in NRs. Concomitantly, we performed next generation sequencing (NGS) analyses in a subset of four NR patients that confirmed alterations in genes that belonged to the Wnt/β-catenin and the phosphoinositide 3-kinase (PI3K) pathways. We speculate that angiogenesis, the Wnt, and the PI3K pathways might offer actionable targets. We also discuss therapeutic alternatives for chemo-immunotherapy-resistant advanced-stage GC patients.
Idioma original | Inglés |
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Número de artículo | 1 |
Publicación | International Journal of Molecular Sciences |
Volumen | 24 |
N.º | 1 |
DOI | |
Estado | Publicada - 2023 |
Nota bibliográfica
Funding Information:This research was funded by FONDECYT grants #1180173 and #1221499, by a Bristol Myers Squibb (BMS) Investigator Sponsored Research grant #ISR CA209-8F3 (to M.G.), and by FONDECYT grant ##1220586 and ANID/MIII ICN09-016/ICN 2021-045; ANID/FONDAP-ACCDIS 1513001 (G.I.O.). Also, Centro Ciencia & Vida, FB210008; Financiamiento Basal para Centros Científicos y Tecnológicos de Excelencia de ANID (A.J.M.M.); and Fondecyt Iniciacion grant #11171015 (M.A.S.).
Publisher Copyright:
© 2022 by the authors.
Áreas temáticas de ASJC Scopus
- Catálisis
- Biología molecular
- Espectroscopia
- Informática aplicada
- Química física y teórica
- Química orgánica
- Química inorgánica