Ca2+ currents in smooth muscle cells isolated from human prostate.

Area of Science:

• Physiology
• Molecular Biology
• Urology

Background:

• Human prostate smooth muscle cells possess electrical properties.
• Understanding ion channel function is crucial for prostate physiology.

Purpose of the Study:

• To identify and characterize voltage-dependent calcium currents in human prostate smooth muscle cells.
• To determine the biophysical properties of these calcium currents.

Main Methods:

• Isolation of prostate smooth muscle cells from human biopsy samples.
• Electrophysiological recordings using patch-clamp techniques under current- and voltage-clamp conditions.

Main Results:

• A significant Ca2+-sensitive inward current was measured in K+-current blocked cells.
• This inward current showed distinct components sensitive to verapamil and NiCl2.
• Action potentials were elicited in prostate myocytes when K+ currents were blocked.

Conclusions:

• Both L-type and T-type calcium channels are present in human prostate smooth muscle.
• These findings are based on the sensitivity of the currents to specific antagonists and holding potentials.