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Updated: Jan 6, 2026

A Method to Define the Effects of Environmental Enrichment on Colon Microbiome Biodiversity in a Mouse Colon Tumor Model
Published on: February 28, 2018
Gut microbiota perturbation is associated with acute sleep disturbance among rectal cancer patients
Velda J González-Mercado1, Anujit Sarkar2, Frank J Penedo3
1College of Nursing, University of South Florida, Tampa, FL, USA.
Abstract:
Cancer treatment-associated gut microbial perturbation/dysbiosis has been implicated in the pathobiology of sleep disturbance; however, evidence is scarce. Eighteen newly diagnosed rectal cancer patients (ages 52-81 years; 10 males) completed a sleep disturbance questionnaire and provided stool samples for 16s RNA gene sequencing during chemo-radiotherapy. Descriptive statistics, Wilcoxon test and regression analyses were computed. Regression analyses showed the Shannon's diversity index to be a significant factor associated with sleep disturbance. This preliminary work suggests that the biological "gut-brain axis" mechanism may be associated with symptoms of sleep disturbance.
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