Inflammatory Response
Inflammation
Inflammatory Response I: Vascular and Cellular
Homeostatic Imbalance
Inflammatory Response II: Inflammatory Exudate and Tissue Repair
What is Homeostasis?
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Updated: Nov 15, 2025

Isolation, Characterization, and Purification of Macrophages from Tissues Affected by Obesity-related Inflammation
Published on: April 3, 2017
Matthew L Meizlish1, Ruth A Franklin1,2, Xu Zhou1,3
1Department of Immunobiology, Yale University School of Medicine, New Haven, Connecticut 06510, USA;
This paper explores how tissues maintain stability through complex interactions among cell types. The authors define tissue homeostasis as a network of circuits that regulate specific variables within tissues. They propose that inflammation occurs when these circuits cannot correct disruptions. The study shows that inflammatory signals use the same functions as homeostatic mechanisms to restore balance. The researchers also examine how the organization of these circuits influences the progression of inflammatory diseases. Their findings suggest a new framework for understanding tissue regulation and could guide future research on inflammation.
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Published on: May 16, 2016
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Published on: September 15, 2017
Area of Science:
Background:
Current research has established that tissues maintain internal stability through complex interactions among cell types. However, the precise organizing principles governing these interactions remain unclear. While numerous studies have documented cellular functions, few have connected these to broader tissue-level regulation. The concept of tissue homeostasis is often described in terms of cellular behavior rather than systemic coordination. This gap motivated researchers to explore how tissues organize functions to sustain homeostasis. No prior work had resolved how inflammation relates to homeostatic circuits. The absence of a unified framework for tissue organization created a need for a new perspective. This paper proposes a systems-based approach to define tissue homeostasis and inflammation. The study aims to clarify how these processes interact to maintain tissue stability.
Purpose Of The Study:
The authors aim to define tissue homeostasis as a network of regulatory circuits. They seek to explain how these circuits maintain specific tissue variables. The study focuses on linking cell-type interactions to tissue-level functions. The goal is to clarify the relationship between tissue homeostasis and inflammation. The researchers propose that inflammation arises when homeostatic mechanisms fail. They intend to show how inflammatory signals use existing circuits to restore balance. The study also explores how these circuits are organized hierarchically. The purpose is to provide a framework for understanding inflammatory disease progression.
Main Methods:
The researchers synthesized existing literature on tissue biology and inflammation. They analyzed how cell types interact to regulate tissue variables. The team used a systems approach to define homeostasis as a network of circuits. They examined how these circuits maintain tissue and systemic stability. The authors described inflammation as a response to uncorrectable deviations. They explored how inflammatory signals repurpose homeostatic functions. The study considered the hierarchy of circuits involved in tissue regulation. The approach combined theoretical modeling with biological examples.
Main Results:
The study defines tissue homeostasis as a collection of circuits regulating tissue variables. Inflammation is described as a response to deviations from homeostasis. The authors show that inflammatory signals use the same circuits as homeostatic mechanisms. These signals coordinate emergency responses to tissue disruptions. The functional organization of tissues allows for both local and systemic stability. The study reveals that inflammation aims to restore homeostasis after failure of normal circuits. The hierarchy of circuits determines the progression of inflammatory diseases. These findings suggest a unified framework for understanding tissue regulation.
Conclusions:
The authors conclude that tissue homeostasis involves circuits regulating specific variables. They propose that inflammation arises when these circuits cannot correct deviations. The study suggests that inflammatory signals repurpose homeostatic functions to restore balance. The functional organization of tissues supports both local and systemic stability. The hierarchy of circuits influences the development of inflammatory diseases. These findings provide a framework for understanding tissue regulation. The authors suggest that this perspective could guide future research on inflammatory mechanisms. The conclusions emphasize the importance of circuit-based approaches in tissue biology.
The authors propose that inflammation arises when homeostatic circuits cannot correct deviations from tissue stability.
Inflammatory signals repurpose the same cellular functions involved in normal tissue organization to coordinate emergency responses.
It allows tissues to maintain both local and systemic stability through coordinated cell-type interactions.
Homeostatic circuits regulate tissue variables, and when they fail, inflammation activates to restore balance.
The organization of circuits determines how inflammation develops and progresses in tissues.
The authors suggest that a circuit-based framework could guide future studies on tissue regulation and inflammatory disease.