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Diabetes-induced rat hyposensitivity to compound 48/80
A Casacó1, D Carvajal, Z Tolón
1Department of Pharmacology, National Center for Scientific Research, Cuidad de La Habana, Cuba.
Canadian Journal of Physiology and Pharmacology
|June 1, 1991
Summary
Diabetes in rats reduces the body's response to compound 48/80, likely due to fewer mast cells. Insulin treatment restored normal responsiveness and mast cell counts in diabetic rats.
Area of Science:
- Pharmacology
- Endocrinology
- Immunology
Background:
- Compound 48/80 is a known mast cell degranulator.
- Diabetes mellitus can affect immune cell function and mediator release.
Purpose of the Study:
- To investigate the effect of alloxan-induced diabetes on rat mortality and tracheal contractile responses to compound 48/80.
- To determine if insulin treatment can reverse diabetes-induced changes in responsiveness to compound 48/80.
- To examine the relationship between mast cell count and compound 48/80 sensitivity in diabetic rats.
Main Methods:
- Induction of diabetes in rats using alloxan.
- Administration of insulin to a subset of diabetic rats.
- Measurement of rat mortality following compound 48/80 administration.
- Assessment of isolated tracheal segment contractile responses to compound 48/80.
- Quantification of peritoneal mast cell numbers.
Main Results:
- Diabetic rats and their tracheal segments showed significantly reduced responsiveness to compound 48/80 compared to control animals.
- Insulin treatment of diabetic rats restored normal responsiveness to compound 48/80.
- Diabetic rats exhibited a lower quantity of peritoneal mast cells than control rats.
- Insulin treatment normalized the peritoneal mast cell count in diabetic rats.
Conclusions:
- Diabetes induces hyposensitivity to compound 48/80 in rats.
- This hyposensitivity is potentially linked to a diabetes-associated decrease in mast cell numbers.
- Insulin therapy can mitigate the effects of diabetes on mast cell degranulation and compound 48/80 responsiveness.