Related Experiment Videos
Prolactin receptors in the rat kidney
The Journal of Endocrinology
|October 1, 1980
Summary
This study found specific binding sites for ovine prolactin in rat kidneys, primarily in proximal tubule cells. This suggests prolactin plays a role in kidney function, particularly sodium metabolism.
Area of Science:
- Endocrinology
- Nephrology
- Molecular Biology
Background:
- Prolactin is a hormone with diverse physiological roles.
- The presence and function of prolactin receptors in the kidney are not fully understood.
Purpose of the Study:
- To investigate the specific binding of ovine prolactin in rat kidney membranes.
- To characterize the kinetic and affinity properties of prolactin binding in the kidney.
- To determine the localization of prolactin binding sites within the kidney.
Main Methods:
- Preparation of crude membrane fractions from rat kidneys and livers.
- Incubation of membrane preparations with 125I-labelled ovine prolactin.
- Scatchard analysis to determine binding affinity and kinetics.
- Autoradiography to localize binding sites within kidney tissue.
Main Results:
- Specific prolactin binding was detected in kidney and adrenal membranes of male rats and liver membranes of female rats.
- Kidney membranes exhibited high-affinity prolactin binding (Kd = 1.4 x 10(-10) mol/l).
- Autoradiography revealed maximal prolactin binding in the epithelial cells of the proximal tubules.
Conclusions:
- The kidney, particularly the proximal tubules, possesses specific prolactin binding sites.
- These findings support a role for prolactin in renal function, potentially influencing sodium metabolism.