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  4. Influence of Testosterone on Autotomy in Castrated Male Rats
 
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Influence of Testosterone on Autotomy in Castrated Male Rats

Resource
LIFE SCIENCES v.70 n.20 pp.2335-2340
Journal
LIFE SCIENCES
Journal Volume
v.70
Journal Issue
n.20
Pages
2335-2340
Date Issued
2001
Date
2001
Author(s)
TSAI, SHEN-KOU
MOK, MARTIN S.
URI
http://ntur.lib.ntu.edu.tw//handle/246246/99207
Abstract
Sex-related differences exist in nociception and gonadal steroids influence the analgesic response in animals and humans. As we have shown previously, estrogen could modify autotomy in female rats using the sciatic nerve transection model. To further characterize the relationship between gonadal steroid and nociception, the role of testosterone on autotomy in sciatic nerve sectioned rats was investigated. Twenty male rats were subjected to orchiectomy (ORX). Then ten rats received subcutaneous sesame oil and the other ten were treated with testosterone propionate in sesame oil (TP; 500 μg/day/rat). All the rats underwent sciatic nerve resection in left hind limb. Degree of self-mutilation was measured daily for 8 weeks. TP reinstatement resulted in significantly lower autotomy scores in orchiectomized rats. The results demonstrated that testosterone could modify the autotomy behavior, an indicator of neuropathic pain, in rats after nerve injury.
Subjects
Testosterone
Orchiectomy
Autotomy
Neuropathic pain
Rat

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