Related Experiment Videos
Ovarian dysfunction in mice following chromium (VI) exposure
R C Murthy1, M Junaid, D K Saxena
1Metal Analysis Laboratory, Industrial Toxicology Research Centre, Lucknow, India. intox@itrc.sirnetd.ernet.in
Toxicology Letters
|December 16, 1996
Summary
High chromium (VI) exposure in female mice drinking water significantly impacts ovarian function, reducing follicle counts and ovulation rates. This suggests potential reproductive health risks from oral chromium exposure.
Area of Science:
- Reproductive Toxicology
- Environmental Health
- Biochemistry
Background:
- Chromium (VI) is a toxic heavy metal with known adverse health effects.
- Understanding its impact on female reproductive systems is crucial for public health.
- Oral exposure is a common route, necessitating studies on its effects.
Purpose of the Study:
- To investigate the effects of oral Chromium (VI) exposure on the ovarian physiology and reproductive parameters in adult female mice.
- To determine dose-dependent and time-dependent toxicological impacts of Chromium (VI) on the female reproductive system.
Main Methods:
- Adult female Swiss albino mice were administered Chromium (VI) in drinking water at various doses (0.05-750 ppm) for 20 or 90 days.
- Ovarian histopathology, follicle counts, superovulated ova counts, estrus cycle duration, and ultrastructural studies were performed.
- Blood chromium levels were measured to assess exposure.
Main Results:
- A dose-dependent increase in atretic follicles and stromal congestion was observed in ovaries.
- Significant reduction in follicle maturation and ova count occurred at higher doses (500 & 750 ppm).
- Estrus cycle duration increased, and ultrastructural changes in follicular cells were noted.
Conclusions:
- Oral exposure to Chromium (VI) can adversely affect ovarian physiology and ovulation rates in female mice.
- The study highlights potential reproductive health risks associated with chronic oral exposure to toxic levels of Chromium (VI).