Hydrogen sulfide and neuronal differentiation: focus on Ca2+ channels

Area of Science:

• Neuroscience
• Molecular Biology
• Physiology

Background:

• Hydrogen sulfide (H2S) is recognized as the third major gasotransmitter in mammals, alongside nitric oxide (NO) and carbon monoxide (CO).
• Endogenous H2S is synthesized from L-cysteine via enzymes like cystathionine-γ-lyase and cystathionine-β-synthase.
• H2S plays a role in various biological processes by interacting with diverse molecular targets.

Purpose of the Study:

• To review the functional modulation of Cav3.2 T-type calcium channels by hydrogen sulfide (H2S).
• To elucidate the molecular mechanisms underlying H2S-induced neuronal differentiation.

Main Methods:

• Analysis of studies investigating the effects of exogenous and endogenous H2S on T-type Ca(2+) channels.
• Examination of H2S effects on Cav3.2 channels in neuronal cell lines (NG108-15) and primary neurons.
• Investigation of H2S-induced changes in Cav3.2-transfected HEK293 cells.

Main Results:

• H2S enhances the activity of T-type Ca(2+) channels, particularly the Cav3.2 subtype, in various cell types.
• Cav3.2 channels are implicated in mediating H2S-induced enhancement of pain signaling in nociceptor neurons.
• H2S promotes neuronal differentiation, including neuritogenesis and upregulation of high-voltage-activated Ca(2+) channels in NG108-15 cells.

Conclusions:

• Hydrogen sulfide significantly modulates the function of Cav3.2 T-type calcium channels.
• Cav3.2 channels are critical mediators of H2S's roles in pain perception and neuronal development.
• Understanding these mechanisms offers insights into H2S-related physiological and pathological processes.