# How Adipocytes Orchestrate Inflammation Within Adipose Tissue?

## TL;DR

This paper explores how fat cells trigger inflammation in fat tissue during obesity, leading to metabolic diseases.

## Contribution

The paper provides a detailed review of the cellular and molecular mechanisms by which adipocytes drive fibro-inflammation in obesity.

## Key findings

- Adipocytes under metabolic stress initiate a fibro-inflammatory response that can become chronic.
- Chronic fibro-inflammation leads to loss of metabolic flexibility and contributes to insulin resistance.
- Nutrient excess, mitochondrial stress, hypoxia, and immunometabolic changes reshape adipocyte identity.

## Abstract

Adipose tissue is far more than a passive reservoir for surplus energy: it is an active metabolic and endocrine organ that senses nutrient availability and orchestrates systemic energy balance. When caloric intake chronically exceeds expenditure, adipocytes become engorged with lipids and exposed to metabolic, mechanical, and hypoxic stress. To adapt, they initiate a fibro-inflammatory response that may be protective in the short term. As this response becomes chronic, adipocytes lose their metabolic flexibility, acquire a maladaptive fibro-inflammatory phenotype, and contribute to the cascade of inflammation, insulin resistance, and metabolic disease that characterizes obesity. In this review, we dissect the cellular and molecular cues that trigger fibro-inflammation, from nutrient excess and mitochondrial stress to hypoxia and immunometabolic rewiring, and highlight how these processes reshape adipocyte identity and tissue homeostasis.