Researchers have identified the transcription factor cAMP response element-binding protein (CREB) as a key player in the age-related decline of immune system control over gut microbiome composition. In a study using fruit flies, the team discovered that CREB, activated by JNK signaling, transcriptionally suppresses the peptidoglycan recognition protein SC2 (PGRP-SC2), which is crucial for maintaining gut health. This suppression leads to an imbalance in microbial populations, contributing to chronic inflammation and tissue dysfunction.

The findings highlight the importance of immune homeostasis in aging, revealing that CREB modulates not only microbial load but also the overall composition of the gut microbiome. By enhancing PGRP-SC2, researchers were able to rescue age-related gut hyperplasia and microbiota imbalance, suggesting that targeting the CREB-PGRP-SC2 axis could offer a novel therapeutic strategy for addressing gut aging and its systemic effects.

This study underscores the potential for targeting immune regulatory pathways to mitigate age-associated dysbiosis, which could have significant implications for longevity and healthspan research.

Source: fightaging.org