Clinical trial NCT04138979: Intestinal Microbiota of Breast Cancer Patients Undergoing Chemotherapy
Official title: Intestinal Microbiota of Breast Cancer Patients Undergoing Chemotherapy
Study type: OBSERVATIONAL
Overall status: UNKNOWN
Conditions: Microbiota
Keywords: gut microbiota
16S rRNA gene
breast cancer chemotherapy
Lead sponsor: First Affiliated Hospital of Harbin Medical University
Sponsor class: OTHER
First posted: 2019-10-25
Enrollment: 80
Sex: FEMALE
Minimum age (years): 18
Maximum age (years): 65
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: yes
Observational model: CASE_CONTROL
Time perspective: CROSS_SECTIONAL
Sampling method: PROBABILITY_SAMPLE
Study population: All patients were included according to the inclusion and exclusion criteria

Brief summary: To date, few studies have addressed the link between gut microbiota and breast cancer chemotherapy, and previous studies have only provided a link between the gut and breast cancer.

Detailed description: To date, few studies have addressed the link between gut microbiota and breast cancer chemotherapy, and previous studies have only provided a link between the gut and breast cancer.At present, studies on the interaction mechanism between intestinal flora and breast cancer mainly focus on two aspects: first, intestinal flora affects the occurrence and progress of breast cancer by affecting estrogen metabolism;Second, intestinal flora can influence the occurrence and treatment of breast cancer by affecting the regulation of the immune system.However, the specific types (or groups) of bacteria that promote the occurrence, development and mechanism of breast cancer still need to be further studied.In addition, since most of the current clinical studies on microorganisms and breast cancer are small sample studies, the accuracy of their conclusions remains to be studied.

Eligibility criteria: Inclusion Criteria:

* Aged 18 to 65 years
* First use of chemotherapy after breast cancer

Exclusion Criteria:

* Pregnancy
* Lactation
* Cigarette smoking
* Alcohol addiction
* Hypertension
* Diabetes mellitus
* Lipid dysregulation
* BMI \> 27
* Recent (\< 3 months prior) use of antibiotics, probiotics, prebiotics, symbiotics, hormonal medication, laxatives, proton pump inhibitors, insulin sensitizers or Chinese herbal medicine
* History of disease with an autoimmune component, such as MS, rheumatoid arthritis, IBS, or IBD
* History of malignancy or any gastrointestinal tract surgery

Primary outcomes:
measure: Transcriptional changes in gut microbiota
timeFrame: baseline,1 day,7 day,14 days,22 days,29 days,36 days,44days,51days,58days,66days,73days,80days
Secondary outcomes:
Other outcomes:
Locations:
city: Harbin
country: China
facility: First affiliated hospital of Harbin medical university
state: Heilongjiang
Study officials:
References:
citation: Luu TH, Michel C, Bard JM, Dravet F, Nazih H, Bobin-Dubigeon C. Intestinal Proportion of Blautia sp. is Associated with Clinical Stage and Histoprognostic Grade in Patients with Early-Stage Breast Cancer. Nutr Cancer. 2017 Feb-Mar;69(2):267-275. doi: 10.1080/01635581.2017.1263750. Epub 2017 Jan 17.
citation: Qin J, Li R, Raes J, Arumugam M, Burgdorf KS, Manichanh C, Nielsen T, Pons N, Levenez F, Yamada T, Mende DR, Li J, Xu J, Li S, Li D, Cao J, Wang B, Liang H, Zheng H, Xie Y, Tap J, Lepage P, Bertalan M, Batto JM, Hansen T, Le Paslier D, Linneberg A, Nielsen HB, Pelletier E, Renault P, Sicheritz-Ponten T, Turner K, Zhu H, Yu C, Li S, Jian M, Zhou Y, Li Y, Zhang X, Li S, Qin N, Yang H, Wang J, Brunak S, Dore J, Guarner F, Kristiansen K, Pedersen O, Parkhill J, Weissenbach J; MetaHIT Consortium; Bork P, Ehrlich SD, Wang J. A human gut microbial gene catalogue established by metagenomic sequencing. Nature. 2010 Mar 4;464(7285):59-65. doi: 10.1038/nature08821.