2026-05-28T13:32:23Zhttps://riuma.uma.es/rest/oai/requestoai:riuma.uma.es:10630/236832026-02-03T12:41:41Zcom_10630_2254col_10630_37957
RIUMA. Repositorio Institucional de la Universidad de Málaga
advisor
Queipo-Ortuño, María Isabel
advisor
Cardona-Díaz, Fernando
author
Sanchez Alcoholado, Lidia
2022-01-25T11:07:18Z
2022-01-25T11:07:18Z
2022-01-25
https://hdl.handle.net/10630/23683
Intestinal-microbiota has been associated with different diseases, among which are obesity and colorectal cancer (CRC), microbiota is assumed to be a possible link between both disorders. Due to this, the composition of the fecal microbiota of patients with CRC with/without obesity was determined in comparison with the microbial profile of healthy-non-obese-controls, in order to unravel the possible relationship of the intestinal-microbiota with the state of inflammation, intestinal permeability, and a bacterial-derivated metabolite, TMAO, all in the context of obesity-associated CRC. Thus, the intestinal-microbiota of patients with CRC and obesity is characterized by the presence of greater abundance of opportunistic pathogens, which can alter the intestinal barrier function and can contribute to inflammatory processes related to CRC by increasing the production of inflammatory molecules (IL-1β, TMAO). On the other hand, gut-microbiota has been linked to the efficacy and toxicity of cancer treatments. Therefore, the identification of composition, abundance and diversity of the intestinal-microbiota that is associated with the response to preoperative-radiochemotherapy of patients with CRC (responders (R) and poor or non-responders (NR)) was determined, as well as the variations in concentrations of different bacterial-metabolites (polyamines, SCFAs). No significant changes were found in the diversity and composition of the intestinal-microbiota with exception of a significant decrease in Fusobacterium, Escherichia, Klebsiella and an increase in Bifidobacterium at post-treatment time compared to baseline.
eng
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Cáncer colorrectal - Tesis doctorales
Cáncer colorrectal - Tratamiento - Tesis doctorales
Role of intestinal microbiota composition in colorectal cancer and in the response to neoadjuvant radiochemotherapy previous to surgery
doctoral thesis
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URL
https://riuma.uma.es/bitstreams/32845f15-9216-4921-8098-25eb06366329/download
File
MD5
e38b54c26e1afbee631d7eb573cda6b9
14455080
application/pdf
TD_SANCHEZ_ALCOHOLADO_Lidia.pdf