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Gut Microbiota and Breast Cancer: Systematic Review and Meta-analysis

Overview
Journal Breast Cancer
Specialty Oncology
Date 2024 Dec 9
PMID 39652259
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Abstract

Background: The gastrointestinal microbiota can modulate systemic estrogens, potentially influencing estrogen-induced breast neoplasia development. This study aimed to assess alterations in the gut microbiota in breast cancer patients.

Methods: A search strategy was developed using the terms: "Microbiota," "Gastrointestinal Microbiome," "Breast Cancer," and synonyms. Ten observational studies were included.

Results: The total sample was 1730 women (929 cases and 801 controls). The meta-analysis of alpha diversity, assessed by the Shannon index, displayed that in the breast cancer group, the diversity of the gut microbiota was reduced compared to controls, with a standardized mean difference (SMD) of - 0.34 (95% CI - 0.59, - 0.10, I = 68%, p = 0.007). Regarding the premenopausal population, there was a significant reduction in the breast cancer group (SMD - 0.67, 95% CI - 1.06, - 0.28, I = 77%, p = 0.0009). In women with a body mass index (BMI) between overweight or obesity, no statistically significant difference was observed (SMD - 0.20; 95% CI - 0.51, 0.11; I 52%, p = 0.20). However, in women with a BMI greater than or equal to 18.5 and less than 25.0, there was lower diversity in women with breast cancer compared to controls (SMD - 0.49, 95% CI - 0.94, - 0.04; I 78%, p = 0.03).

Conclusions: The study found a significant difference in gut microbiota diversity between women with breast cancer and controls, supporting the growing evidence that the gut microbiota may play a role in mammary carcinogenesis.

References
1.
Siegel R, Miller K, Wagle N, Jemal A . Cancer statistics, 2023. CA Cancer J Clin. 2023; 73(1):17-48. DOI: 10.3322/caac.21763. View

2.
Chen W, Wei W, Yu L, Ye Z, Huang F, Zhang L . Mammary Development and Breast Cancer: a Notch Perspective. J Mammary Gland Biol Neoplasia. 2021; 26(3):309-320. PMC: 8566423. DOI: 10.1007/s10911-021-09496-1. View

3.
Hanahan D . Hallmarks of Cancer: New Dimensions. Cancer Discov. 2022; 12(1):31-46. DOI: 10.1158/2159-8290.CD-21-1059. View

4.
Perez N, Dorsen C, Squires A . Dysbiosis of the Gut Microbiome: A Concept Analysis. J Holist Nurs. 2019; 38(2):223-232. DOI: 10.1177/0898010119879527. View

5.
Bhatt A, Redinbo M, Bultman S . The role of the microbiome in cancer development and therapy. CA Cancer J Clin. 2017; 67(4):326-344. PMC: 5530583. DOI: 10.3322/caac.21398. View