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Related Experiment Video

Updated: Mar 2, 2026

Recording Electrical Currents across the Plasma Membrane of Mammalian Sperm Cells

Recording Electrical Currents across the Plasma Membrane of Mammalian Sperm Cells

Published on: February 14, 2021

Transient receptor potential (TRP) channel function in the reproductive axis.

Viktoria Götz¹, Sen Qiao¹, Andreas Beck²

¹Pharmacology and Toxicology, Center for Molecular Signaling (PZMS), Saarland University School of Medicine, Homburg, Germany.

|May 20, 2017

Summary

Transient receptor potential (TRP) channels, particularly TRPC channels, are crucial for reproductive hormone regulation. TRPC5 in pituitary gonadotropes is key for GnRH-stimulated calcium signaling, impacting reproductive function.

Keywords:

Ca(2+) imaging GCaMP3 Genetic Ca(2+) indicator Genetic labeling GnRH neurons Gonadotropes Gonads Heat map Hypothalamus Kisspeptin neurons Knock-out Pituitary Plasticity RNA-sequencing Reproduction TRP channels TRPC channels TRPC5 Whole-cell patch clamp

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Area of Science:

Neuroendocrinology
Reproductive Physiology
Ion Channel Function

Background:

Transient receptor potential (TRP) channels are vital in hormone-secreting cells and reproductive physiology.
TRP channels are expressed throughout the hypothalamic-pituitary-gonadal (hpg) axis, with emerging functional roles.
Canonical TRP (TRPC) channels are found in key reproductive neuroendocrine cells like kisspeptin and gonadotropin-releasing hormone (GnRH) neurons.

Purpose of the Study:

To investigate the functional role of TRPC channels in reproductive physiology, specifically in the hypothalamic-pituitary-gonadal axis.
To elucidate the involvement of TRPC channels in GnRH neuron signaling and gonadotrope function.
To understand the contribution of TRPC5 to gonadotrope cell membrane depolarization and calcium influx.

Main Methods:

Expression studies of TRP channels across the hpg axis.
Electrophysiological analyses of TRPC channel function in kisspeptin, GnRH, and gonadotrope cells.
Investigation of TRPC channel plasticity in response to hormonal status.

Main Results:

TRPC channels are expressed in kisspeptin and GnRH neurons, mediating leptin and kisspeptin signaling.
TRPC4 channels are involved in kisspeptin-mediated depolarization of GnRH neurons.
TRPC5 channels in gonadotropes contribute to GnRH-induced membrane depolarization and calcium increase.

Conclusions:

TRPC channels, especially TRPC5 in gonadotropes, play a significant role in reproductive hormone secretion.
TRPC channel activity in gonadotropes is influenced by hormonal status, indicating adaptive plasticity.
Further in vivo studies using conditional gene targeting are necessary to fully define the physiological roles of TRPC channels in the reproductive axis.