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Related Experiment Video

Updated: Jul 4, 2026

Using Multi-fluorinated Bile Acids and In Vivo Magnetic Resonance Imaging to Measure Bile Acid Transport

Using Multi-fluorinated Bile Acids and In Vivo Magnetic Resonance Imaging to Measure Bile Acid Transport

Published on: November 27, 2016

Testosterone and dihydrotestosterone inhibit gallbladder motility through multiple signalling pathways.

Loren W Kline¹, Edward Karpinski

¹University of Alberta, Department of Physiology, Edmonton, Alberta T6G 2H7, Canada. lkline@ualberta.ca

|July 1, 2008

Summary

Testosterone (T) and its metabolite 5-alpha dihydrotestosterone (DHT) rapidly inhibit gallbladder motility through nongenomic pathways. These hormones reduce contractions by affecting calcium signaling and protein kinase C (PKC) activity.

Related Experiment Videos

Last Updated: Jul 4, 2026

Using Multi-fluorinated Bile Acids and In Vivo Magnetic Resonance Imaging to Measure Bile Acid Transport

Using Multi-fluorinated Bile Acids and In Vivo Magnetic Resonance Imaging to Measure Bile Acid Transport

Published on: November 27, 2016

Area of Science:

Endocrinology
Pharmacology
Physiology

Background:

Testosterone (T) induces vasodilation via nongenomic pathways, involving voltage-dependent K(+) channels.
T infusion reduces peripheral resistance in male heart failure patients.
The effects of T and its metabolite 5-alpha dihydrotestosterone (DHT) on gallbladder contraction are not well understood.

Purpose of the Study:

To investigate the effects of T and DHT on guinea pig gallbladder strip contractions.
To elucidate the specific signaling pathways involved in T- and DHT-induced gallbladder relaxation.

Main Methods:

Concentration-dependent relaxation assays using guinea pig gallbladder strips.
Application of inhibitors for PKA, IP(3)-induced Ca(2+) release, and PKC.
Use of aromatase inhibitors (chrysin, genistein) to assess hormonal interactions.

Main Results:

T and DHT induced concentration-dependent relaxation of CCK-induced gallbladder tension.
Inhibition of IP(3)-induced Ca(2+) release significantly reduced T/DHT-induced relaxation.
PKC inhibitors significantly decreased T/DHT-induced relaxation.
Chrysin enhanced T-induced relaxation, while genistein had no significant effect.

Conclusions:

T and DHT rapidly inhibit gallbladder motility through nongenomic mechanisms.
Key pathways mediating this effect include inhibition of intracellular Ca(2+) release, extracellular Ca(2+) entry, and involvement of PKC.
Hormonal modulation of gallbladder function offers potential therapeutic targets.