Related Experiment Videos
Antigonadotrophic effect of Mycobacterium tuberculosis
1Department of Physiology, All India Institute of Medical Sciences, New Delhi, India.
Hormone and Metabolic Research = Hormon- Und Stoffwechselforschung = Hormones Et Metabolisme
|December 24, 1997
Summary
Mycobacterium tuberculosis significantly inhibits progesterone production in rat granulosa cells. This bacterium also blocks the stimulatory effect of human chorionic gonadotropin (hCG) without affecting cell viability.
Area of Science:
- Reproductive biology
- Microbiology
- Endocrinology
Background:
- Granulosa cells are crucial for ovarian function and hormone production.
- Mycobacterium tuberculosis is a pathogen that can affect various bodily systems.
Purpose of the Study:
- To investigate the direct impact of Mycobacterium tuberculosis on granulosa cell progesterone synthesis.
- To determine if Mycobacterium tuberculosis affects the response of granulosa cells to human chorionic gonadotropin (hCG).
Main Methods:
- Granulosa cells were isolated from immature rats treated with pregnant mare serum gonadotropin (PMSG).
- Cells were incubated with Mycobacterium tuberculosis lysate, with or without hCG.
- Progesterone production and cell viability were measured.
Main Results:
- Mycobacterial lysate significantly reduced basal progesterone production.
- The hCG-stimulated progesterone production was completely inhibited by the lysate.
- Granulosa cell viability remained unaffected, indicating no cytotoxic effect.
Conclusions:
- Mycobacterium tuberculosis directly inhibits progesterone production by ovarian granulosa cells.
- The bacterium interferes with the signaling pathways regulated by hCG in granulosa cells.
- These findings suggest a potential mechanism for reproductive disturbances in tuberculosis-infected individuals.