Abstract:
PURPOSE:Evaluate effect of prostatic irradiation on erectile function. MATERIALS AND METHODS:Forty-seven male adult rats were divided into three groups according to a single radiation dose to the prostate: control (no irradiation) (n = 15), 1,000 cGy (n = 15), and 2,000 cGy (n = 17). Five months after irradiation, rats underwent evaluation of penile vascularity and of erectile response to central and peripheral stimulation. After the study a proximal-shaft penile segment was obtained for staining. RESULTS:Histologic evaluation demonstrated that, with increasing radiation, the number of nitric oxide synthase-containing nerve fibers per penile segment decreased significantly: control, 225.6 +/- 9.7; 1,000 cGy, 156.3 +/- 12.0; 2,000 cGy, 85.8 +/- 10.1 (standard error of the mean). Maximal intracavernous pressure induced with electrostimulation decreased significantly with increasing radiation dose. After injection of papaverine, maximal intracavernous pressure was significantly decreased in only the 2,000-cGy group. CONCLUSION:A dose of 2,000 cGy over the prostatic bed induces erectile dysfunction by causing defects in the vascular supply of the erectile tissue and in the nerves and smooth muscle.
journal_name
Radiologyjournal_title
Radiologyauthors
Carrier S,Hricak H,Lee SS,Baba K,Morgan DM,Nunes L,Ross GY,Phillips TL,Lue TFdoi
10.1148/radiology.195.1.7534430subject
Has Abstractpub_date
1995-04-01 00:00:00pages
95-9issue
1eissn
0033-8419issn
1527-1315journal_volume
195pub_type
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