It is clear that creatine plays a reservoir of high energy phosphate bond as creatine phosphate and maintains ATP levels in skeletal muscle and nervous tissues. Creatine and creatine kinase activity are required to utilize creatine phosphate as high energy phosphate.
The contents of creatine in testis of rats were determined by the method of Van Pilsum and compared with other organs for the study of the physiological role of creatine in testis.
Creatine content of tests was 39.82±3.36 ug/g wet tissue compared with skeletal muscle, 52.92±10.25 ug/g wet tissue. It was relatively high compared with brain (15.45±6.49 ug/g wet tissue), heart (20.0±2.91 ug/g wet tissue), kidney (29.55±2.52 ug/g wet tissue) and liver (12.68±1.94 ug/g wet tissue).
Creatinine content of testes (45.84±4.08 ug/g wet tissue) was very high, compared with skeletal muscle (24.14±7.73 ug/g wet tissue), heart .(23.71±4.73 ug/g wet tissue), brain (17.24±1.19 ug/g wet tissue), kidney (14.92±3.45 ug/g set tissue), and liver (9.59 ±1.26 ug/g wet tissue).
I suppose that creatine in testis of rats may be a part of potent system for generation of ATP from ADP hydrolyzing creatine phosphate.
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