# The Physiological Significance of TRP and Piezo Channels as Physical Stimulus Sensors in Brown Adipocytes

## TL;DR

This review explains how TRPV2 and Piezo1 ion channels help regulate brown fat cell development and heat production through calcium signaling.

## Contribution

The paper introduces the concept of a 'modal shift' in TRP/Piezo channels during brown adipocyte development.

## Key findings

- TRPV2 and Piezo1 are key regulators of brown adipocyte differentiation and thermogenesis.
- Ion channel function changes during different stages of brown adipocyte development.
- Cation-channel-mediated calcium signaling is crucial for thermogenesis and metabolic balance.

## Abstract

What are the main findings?
This review highlights Ca2+-permeable ion channels, particularly TRPV2 and Piezo1, as important regulators of brown adipocyte differentiation and thermogenesis.Recent evidence supports the concept of a stage-dependent shift in ion channel function during brown adipocyte differentiation, which may involve changes in channel sensitivity and regulatory mechanisms.

This review highlights Ca2+-permeable ion channels, particularly TRPV2 and Piezo1, as important regulators of brown adipocyte differentiation and thermogenesis.

Recent evidence supports the concept of a stage-dependent shift in ion channel function during brown adipocyte differentiation, which may involve changes in channel sensitivity and regulatory mechanisms.

What are the implications of the main findings?
These findings clarify the role of Ca2+ signaling in brown adipocyte responses to physiological stimuli.Cation-channel-mediated Ca2+ signaling plays an important role in regulating thermogenesis and metabolic homeostasis.

These findings clarify the role of Ca2+ signaling in brown adipocyte responses to physiological stimuli.

Cation-channel-mediated Ca2+ signaling plays an important role in regulating thermogenesis and metabolic homeostasis.

Most transient receptor potential (TRP) channels are Ca2+-permeable non-selective cation channels that function as polymodal receptors activated by a wide variety of stimuli, including natural compounds such as pungent substances, physical stimuli, lipids, intracellular signaling molecules, and ions. Their physiological roles are diverse, including sensory perception, ion transport, and intracellular signaling. Similarly, Piezo channels, which are also Ca2+-permeable non-selective cation channels, are activated by mechanical stimuli such as membrane stretching and contribute to touch sensation, blood flow regulation, and bladder-filling sensation, among other functions. While research on non-selective cation channels in relation to energy metabolism has primarily focused on TRP channels expressed in primary afferent neurons, studies over the past decade have revealed the important roles of TRP and Piezo channels in brown adipocytes. In this review, we highlight evidence regarding the contributions of TRPV2 and Piezo1 to brown adipocyte differentiation and thermogenesis and briefly summarize recent advances regarding other TRP channels expressed in brown adipocytes. Furthermore, we propose a conceptual framework in which a “modal shift” in TRP/Piezo channels, defined as developmental stage-dependent changes in their functional properties, may contribute to the regulation of brown adipocytes’ functions.