Urolithin metabotypes can determine the modulation of gut microbiota in healthy individuals by tracking walnuts consumption over three days

Walnuts are rich in polyphenols ellagitannins, modulate gut microbiota (GM), and exert health benefits after long-term consumption. The metabolism of ellagitannins to urolithins via GM depends on urolithin metabotypes (UM-A, -B, or -0), which have been reported to predict host responsiveness to a polyphenol-rich intervention. This study aims to assess whether UMs were associated with differential GM modulation after short-term walnut consumption. In this study, 27 healthy individuals consumed 33 g of peeled raw walnuts over three days. GM profiling was determined using 16S rRNA illumina sequencing and specific real-time quantitative polymerase chain reactions (qPCRs), as well as microbial activity using short-chain fatty acids analysis in stool samples. UMs stratification of volunteers was assessed using ultra performance liquid chromatography–electro spray ionization–quadrupole time of flight–mass spectrometry (UPLC-ESI-QTOF-MS) analysis of urolithins in urine samples. The gut microbiota associated with UM-B was more sensitive to the walnut intervention. Blautia, Bifidobacterium, and members of the Coriobacteriaceae family, including Gordonibacter, increased exclusively in UM-B subjects, while some members of the Lachnospiraceae family decreased in UM-A individuals. Coprococcus and Collinsella increased in both UMs and higher acetate and propionate production resulted after walnuts intake. Our results show that walnuts consumption after only three days modulates GM in a urolithin metabotype-depending manner and increases the production of short-chain fatty acids (SCFA).

Bibliographic Details

Main Authors:	García Mantrana, Izaskun, Calatayud, Marta, Romo Vaquero, María, Espín de Gea, Juan Carlos, Selma, María Victoria, Collado, María Carmen
Other Authors:	Agencia Estatal de Investigación (España)
Format:	artículo biblioteca
Published:	Multidisciplinary Digital Publishing Institute 2019-10-16
Subjects:	Walnuts, Polyphenol, Urolithins, Metabotypes, Gut microbiota, Gordonibacter, Personalised nutrition,
Online Access:	http://hdl.handle.net/10261/193507 http://dx.doi.org/10.13039/501100003130 http://dx.doi.org/10.13039/501100011033 http://dx.doi.org/10.13039/501100000781 http://dx.doi.org/10.13039/501100003329
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