Bacterial Diet Affects the Age-dependent Decline of Associative Learning in

Overview

Journal Elife

Specialty Biology

Date 2023 May 30

PMID 37252859

Authors

Satoshi Higurashi

Sachio Tsukada

Binta Maria Aleogho

Joo Hyun Park

Yana Al-Hebri

Masaru Tanaka

Shunji Nakano

Ikue Mori

Kentaro Noma

Affiliations

Soon will be listed here.

Abstract

The causality and mechanism of dietary effects on brain aging are still unclear due to the long time scales of aging. The nematode has contributed to aging research because of its short lifespan and easy genetic manipulation. When fed the standard laboratory diet, , experiences an age-dependent decline in temperature-food associative learning, called thermotaxis. To address if diet affects this decline, we screened 35 lactic acid bacteria as alternative diet and found that animals maintained high thermotaxis ability when fed a clade of enriched with heterofermentative bacteria. Among them, us maintained the thermotaxis of aged animals without affecting their lifespan and motility. The effect of depends on the DAF-16 transcription factor functioning in neurons. Furthermore, RNA sequencing analysis revealed that differentially expressed genes between aged animals fed different bacteria were enriched with DAF-16 targets. Our results demonstrate that diet can impact brain aging in a -dependent manner without changing the lifespan.

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