# The PPIase Activity of CypB Is Essential for the Activation of Both AKT/mTOR and XBP1s Signaling Pathways during the Differentiation of 3T3-L1 Preadipocytes

## TL;DR

This study shows that CypB's PPIase activity is crucial for activating key signaling pathways during preadipocyte differentiation and lipid metabolism, offering potential for obesity treatments.

## Contribution

The study reveals the essential role of CypB's PPIase activity in AKT/mTOR and XBP1s pathways during preadipocyte differentiation.

## Key findings

- Inhibiting CypB's PPIase activity suppressed key proteins in adipocyte differentiation.
- CypB's PPIase activity impacts lipid metabolism via the AKT/mTOR and XBP1s pathways.
- Targeting CypB's PPIase activity may offer new therapeutic strategies for obesity.

## Abstract

In this study, we undertook an extensive investigation to determine how CypB PPIase activity affects preadipocyte differentiation and lipid metabolism. Our findings revealed that inhibition of CypB’s PPIase activity suppressed the expression of crucial proteins involved in adipocyte differentiation and induced changes in proteins regulating the cell cycle. Furthermore, we clarified the impact of CypB’s PPIase activity on lipid metabolism via the AKT/mTOR signaling pathway. Additionally, we demonstrated the involvement of CypB’s PPIase activity in lipid metabolism through the XBP1s pathway. These discoveries offer invaluable insights for devising innovative therapeutic strategies aimed at treating and averting obesity and its related health complications. Targeting CypB’s PPIase activity may emerge as a promising avenue for addressing obesity-related conditions. Furthermore, our research opens up opportunities for creating new therapeutic strategies by enhancing our comprehension of the processes involved in cellular endoplasmic reticulum stress.