Project description:Chemoimmunotherapy with anti-programmed cell death 1/ligand 1 and cytotoxic chemotherapy is a promising therapeutic modality for women with triple-negative breast cancer, but questions remain regarding optimal chemotherapy backbone and biomarkers for patient selection. We report final outcomes from a phase Ib trial evaluating pembrolizumab (200mg IV every 3 weeks) with either weekly paclitaxel (80mg/m2 weekly) or flat-dose capecitabine (2000mg orally twice daily for 7 days of every 14-day cycle) in the 1st/2nd line setting. The primary endpoint is safety (receipt of 2 cycles without grade III/IV toxicities requiring discontinuation or ≥21-day delays). The secondary endpoint is efficacy (week 12 objective response). Exploratory aims are to characterize immunologic effects of treatment over time, and to evaluate novel biomarkers. The trial demonstrates that both regimens meet the pre-specified safety endpoint (paclitaxel: 87%; capecitabine: 100%). Objective response rate is 29% for pembrolizumab/paclitaxel (n=4/13, 95% CI: 10-61%) and 43% for pembrolizumab/capecitabine (n=6/14, 95% CI: 18-71%). Partial responses are observed in two subjects with chemo-refractory metaplastic carcinoma (both in capecitabine arm). Both regimens are associated with significant peripheral leukocyte contraction over time. Response is associated with clinical PD-L1 score, non-receipt of prior chemotherapy, and the H&E stromal tumor infiltrating lymphocyte score, but also by a novel 27 gene IO score and spatial biomarkers (lymphocyte spatial skewness). In conclusion, pembrolizumab with paclitaxel or capecitabine is safe and clinically active. Both regimens are lymphodepleting, highlighting the competing immunostimulatory versus lymphotoxic effects of cytotoxic chemotherapy. Further exploration of the IO score and spatial TIL biomarkers is warranted.

2023-02-17 | GSE225078 | GEO

First-line bevacizumab and capecitabine-oxaliplatin in elderly patients with mCRC: GEMCAD phase II BECOX study.

Project description: Not available

| S-EPMC4102952 | biostudies-literature

RNA data of MKN45 tumours treated with ERY974 and/or capecitabine in huNOG mice

Project description:We found that ERY974 shows only moderate antitumor efficacy in MKN45 non-inflamed tumor in huNOG mice. We also observed that ERY974 + capecitabine increases antitumour efficacy in non-inflamed MKN45 tumours. To identify a mechanism of combination effect, we compared RNA expression of MKN45 tumors treated with ERY974, capecitabine, or combination.

2022-08-21 | GSE211373 | GEO

Tumour gene expression predicts response to cetuximab in patients with KRAS wild-type metastatic colorectal cancer.

Project description: Not available

| S-EPMC3049558 | biostudies-literature

Gut microbiota correlates with antitumor activity in patients with mCRC and NSCLC treated with cetuximab plus avelumab.

Project description: Not available

| S-EPMC9321613 | biostudies-literature