Testicular Function and the Effects of Microwave Radiation.
Final rept. Apr 83-Aug 85,
TEXAS UNIV HEALTH SCIENCE CENTER AT DALLAS
Pagination or Media Count:
The effects of pulse modulated PM and continuous wave CW microwave radiation MWR at 1.3 GHZ on spermiogenesis in the rat were studied. Undrugged freely mobile or anesthetized adult male rats were treated, then Sacrificed at discrete latencies in relationship to the 13-day cycle time of the seminiferous epithelium. Changes in rectal and testicular temperatures were measured during warm-water immersion of the testicles. Exposure of the freely mobile rat for 8 h to CW MWR at 9 mWg was ineffective. Acute 90 min exposure of the anesthetized rat, PM MWR at 7.7 mWg yielded sharp reductions in daily sperm production DSP at 13 and 26 days with only partial recovery at 52 days. There were no detectable changes at 6.5 days, thus suggesting the absence of an effect on mature spermatids. Immersion heating of the testis to 39 C yielded an initial decline in DSP at 6.5 days, followed by recovery to control levels. With respect to changes in DSP andor sperm morphology, the elevation of testicular temperature was a common underlying variable a rise to at least 39 C through either MWR or conventionally induced heating was required to produce evident decrement. Thus, MWR had the most pronounced impact on early spermatids andor primary spermatocytes. CW MWR yielded essentially the same results as did PM MWR. The major factor impacting sperm production in the adult rat temperature rise in the testis. Keywords Rat Testicular function Neuroendocrine Continuous wave Pulsed modulated Radiation dosage.