Related Experiment Video
Updated: Jun 27, 2026
12:09
Yeast Luminometric and Xenopus Oocyte Electrophysiological Examinations of the Molecular Mechanosensitivity of TRPV4
Published on: December 31, 2013
A TRP channel-steroid marriage
1Department of Molecular Cell Biology, Laboratory of Ion Channel Research, KU Leuven, Campus Gasthuisberg, Herestraat 49, bus 802, B-3000 Leuven, Belgium. bernd.nilius@med.kuleuven.be
Nature Cell Biology
|December 2, 2008
Summary
Researchers discovered a functional link between TRPM3 channels and pregnenolone sulfate, a key steroid hormone. This finding reveals a novel connection in cellular signaling pathways.
Area of Science:
- Biochemistry
- Molecular Biology
- Neuroscience
Background:
- Transient Receptor Potential Melastatin 3 (TRPM3) is a cation channel with incompletely understood functions.
- Pregnenolone sulfate (PS) is a neurosteroid derived from pregnenolone, the precursor to all steroid hormones.
- Steroid hormones play critical roles in various physiological processes, including neurological function.
Purpose of the Study:
- To investigate the functional relationship between TRPM3 channels and pregnenolone sulfate.
- To elucidate the potential role of this association in cellular signaling.
Main Methods:
- Utilized electrophysiological techniques to study TRPM3 channel activity.
- Employed biochemical assays to assess the interaction between TRPM3 and pregnenolone sulfate.
- Investigated the effects of pregnenolone sulfate on TRPM3 channel function in cellular models.
Main Results:
- A significant functional association between TRPM3 and pregnenolone sulfate was identified.
- Pregnenolone sulfate was found to modulate TRPM3 channel activity.
- This interaction suggests a novel regulatory mechanism involving TRPM3 and neurosteroids.
Conclusions:
- The study reveals an unexpected functional link between the TRPM3 ion channel and pregnenolone sulfate.
- This discovery opens new avenues for understanding neurosteroid signaling and TRPM3 channel regulation.
- Further research is warranted to explore the physiological implications of this association.
Related Concept Videos
01:31Internal Receptors
Many cellular signals are hydrophilic and therefore cannot pass through the plasma membrane. However, small or hydrophobic signaling molecules can cross the hydrophobic core of the plasma membrane and bind to internal, or intracellular, receptors that reside within the cell. Many mammalian steroid hormones use this mechanism of cell signaling, as does nitric oxide (NO) gas.
01:18Trichomoniasis
Trichomonas vaginalis is a flagellated protozoan parasite and the causative agent of trichomoniasis, one of the most prevalent non-viral sexually transmitted infections in the United States. This extracellular parasite primarily colonizes the lower genitourinary tract in women—particularly the vagina—and in men, the urethra and prostate. Its structural and functional adaptations enable its survival, motility, and pathogenicity within the host environment.Structural Features and Host EntryT.
01:33Hormonal Regulation
The renin-aldosterone system is an endocrine system which guides the renal absorption of water and electrolytes, thus managing blood pressure and osmoregulation. Activation of the system begins in the kidneys with a small cluster of cells adjacent to the afferent and efferent blood vessels of the renal corpuscle. As the nephrons are filtering blood, juxtaglomerular cells monitor blood pressure. If they detect a decrease in pressure, they release the hormone renin into the bloodstream.
01:40Hormonal Regulation
Hormones regulate a significant portion of digestion through activation of the neuroendocrine system. The neuroendocrine system of digestion contains many different hormones all with multiple functions that are both, directly and indirectly, involved in digestion.
01:08Intracellular Hormone Receptors
Lipid-soluble hormones diffuse across the plasma and nuclear membrane of target cells to bind to their specific intracellular receptors. These receptors act as transcription factors that regulate gene expression and protein synthesis in the target cell
01:31Transducer Mechanism: Nuclear Receptors
Nuclear receptors, or NRs, are unique transcription factors that regulate gene transcription and affect the cellular pathways involved in reproduction, development, or metabolism. Their ability to be stimulated by small lipophilic ligands and control vital cellular processes makes them ideal drug targets. Nearly 10-15% of currently prescribed drugs target these receptors.
About 48 different soluble family members of nuclear receptors are identified that can be divided into two main classes:
About 48 different soluble family members of nuclear receptors are identified that can be divided into two main classes: