NCT06875648

Intestinal Flora Differences Between Colorectal Cancer Patients and Healthy Individuals

Intestinal Flora Differences Between Colorectal Cancer Patients and Healthy Individuals: A Case-Control Study

• Status: Completed
• Phase: —
• Study type: Observational
• Enrollment: 61 (actual)
• Sponsor: Hansung University · Academic / Other
• Sex: All
• Age: 18 Years – 80 Years
• Healthy volunteers: Accepted

Summary

This observational case-control study aims to compare the composition of intestinal microbiota between colorectal cancer (CRC) patients and healthy individuals. Fecal samples from 36 CRC patients and 25 healthy controls were analyzed for bacterial abundance. Results indicate significant differences in beneficial, neutral, and harmful bacterial populations between groups, with CRC patients showing reduced beneficial flora (e.g., Lactobacillus) and increased harmful/neutral flora (e.g., Staphylococcus). Further stratification by cancer stage (I-III) revealed progressive dysbiosis with disease progression.

Detailed description

This observational case-control study investigates the compositional differences in intestinal microbiota between individuals diagnosed with colorectal cancer (CRC) and healthy controls. The study enrolled 36 CRC patients confirmed by histopathology and 25 age- and gender-matched healthy volunteers without gastrointestinal diseases or antibiotic/probiotic use within the preceding three months. Fecal samples were collected from CRC patients at the time of diagnosis and from healthy participants during routine health screenings. Utilizing 16S rRNA sequencing or quantitative PCR, the relative abundance of specific bacterial taxa (e.g., Lactobacillus, Bifidobacterium, Staphylococcus) was quantified to assess dysbiosis patterns. Additionally, the analysis stratified CRC patients by clinical stage (I-III) to explore progressive shifts in microbial communities with disease advancement. The findings aim to elucidate the role of gut microbiota in CRC pathogenesis and provide insights into potential microbiome-based diagnostic or therapeutic strategies.

Conditions

• Colorectal Cancer; Gut Microbiota Dysbiosis

Interventions

Type	Name	Description
OTHER	Not applicable (observational study)	Retrospective analysis of gut microbiota in CRC patients vs. healthy controls. No interventions were administered; data were collected from archived samples and medical records.

Timeline

• Start date: 2021-01-01
• Primary completion: 2025-03-01
• Completion: 2025-03-01
• First posted: 2025-03-13
• Last updated: 2025-03-18

Locations

1 site across 1 country: China