RT Journal Article
T1 Relationships of Gut Microbiota Composition, Short-Chain Fatty Acids and Polyamines with the Pathological Response to Neoadjuvant Radiochemotherapy in Colorectal Cancer Patients.
A1 Sánchez-Alcoholado, Lidia
A1 Laborda-Illanes, Aurora
A1 Otero, Ana
A1 Ordóñez, Rafael
A1 González-González, Alicia
A1 Plaza-Andrades, Isaac
A1 Ramos-Molina, Bruno
A1 Gómez-Millán, Jaime
A1 Queipo-Ortuño, María Isabel
K1 SCFAs
K1 colorectal cancer
K1 gut microbiota
K1 gut permeability
K1 radiochemotherapy
K1 treatment outcome
AB Emerging evidence has suggested that dysbiosis of the gut microbiota may influence the drug efficacy of colorectal cancer (CRC) patients during cancer treatment by modulating drug metabolism and the host immune response. Moreover, gut microbiota can produce metabolites that may influence tumor proliferation and therapy responsiveness. In this study we have investigated the potential contribution of the gut microbiota and microbial-derived metabolites such as short chain fatty acids and polyamines to neoadjuvant radiochemotherapy (RCT) outcome in CRC patients. First, we established a profile for healthy gut microbiota by comparing the microbial diversity and composition between CRC patients and healthy controls. Second, our metagenomic analysis revealed that the gut microbiota composition of CRC patients was relatively stable over treatment time with neoadjuvant RCT. Nevertheless, treated patients who achieved clinical benefits from RTC (responders, R) had significantly higher microbial diversity and richness compared to non-responder patients (NR). Importantly, the fecal microbiota of the R was enriched in butyrate-producing bacteria and had significantly higher levels of acetic, butyric, isobutyric, and hexanoic acids than NR. In addition, NR patients exhibited higher serum levels of spermine and acetyl polyamines (oncometabolites related to CRC) as well as zonulin (gut permeability marker), and their gut microbiota was abundant in pro-inflammatory species. Finally, we identified a baseline consortium of five bacterial species that could potentially predict CRC treatment outcome. Overall, our results suggest that the gut microbiota may have an important role in the response to cancer therapies in CRC patients.
YR 2021
FD 2021-09-02
LK http://hdl.handle.net/10668/18511
UL http://hdl.handle.net/10668/18511
LA en
DS RISalud
RD Apr 18, 2025