Enterolignan Production in a Flaxseed Intervention Study in Postmenopausal US Women of African Ancestry and European Ancestry.
Nutrients
; 13(3)2021 Mar 12.
Article
in En
| MEDLINE
| ID: mdl-33809130
ABSTRACT
Lignans are phytochemicals studied extensively as dietary factors in chronic disease etiology. Our goal was to examine associations between the gut microbiota and lignan metabolism and whether these associations differ by ethnicity. We conducted a flaxseed (FS) dietary intervention in 252 healthy, postmenopausal women of African ancestry (AA) and European ancestry (EA). Participants consumed ~10 g/d ground flaxseed for 6 weeks and provided overnight urine collections and fecal samples before and after intervention. The gut microbiota was characterized using 16S rRNA gene sequencing and differences in microbial community composition compared by ethnicity and intervention status. We observed a significant difference in the composition of the microbiota measured as beta diversity (p < 0.05) between AA and EA at baseline that was attenuated with FS consumption. Genera that were significantly associated with ENL production (e.g., Klebsiella, Lactobacillus, Slackia, Senegalimassilia) were unique to each group. Bacteria (e.g., Fusobacteria, Pyramidobacter and Odoribacter) previously associated with colorectal cancer and cardiovascular disease, both diet-related chronic diseases, were unique to either AA or EA and were significantly reduced in the FS intervention. This study suggests that ethnic variation in ENL metabolism may be linked to gut microbiota composition, and its impact on disease risk deserves future investigation.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Black or African American
/
Postmenopause
/
Lignans
/
Flax
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White People
/
Gastrointestinal Microbiome
/
Phytotherapy
Type of study:
Clinical_trials
Limits:
Female
/
Humans
/
Middle aged
Language:
En
Journal:
Nutrients
Year:
2021
Type:
Article
Affiliation country:
United States