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Updated: Oct 2, 2026

Contractility Measurements on Isolated Papillary Muscles for the Investigation of Cardiac Inotropy in Mice
Published on: September 17, 2015
Effect of papaya seed extract on contractile response of cauda epididymal tubules
1Department of Zoology, University School of Sciences, Gujarat University, Ahmedabad, India. zooldeptgu@satyam.net.in
Aim:
To evaluate the administration of Carica papaya seed extract on the contractility of cauda epididymal tubules in male rats.
Methods:
Adult male albino rats were administered intramuscularly papaya seed extract at a dose of 0.5 mg/kg/day for 7 days. Animals were killed, cauda epididymal tubules of 5 cm length were isolated and the contractile response to different concentrations of adrenalin (1-500 microg/25mL) was examined. In another group of animals, the contractile response was assayed 3 months after withdrawal of the treatment.
Results:
Papaya seed extract brought about a significant decrease in the contractile response of epididymal tubules as compared with the control. After three months of papaya withdrawal, a nearly normal pattern of contraction was regained.
Conclusion:
Papaya seed treatment reversibly reduces the contractile response of cauda epididymal tubules.

