Abstract
Abstract Previously we reported that the experimental unilateral cryptorchidism altered the expression pattern of LH receptor mRNA in abdominal testis. To clarify whether the change was due to exposure of Leydig cells to high temperature in the abdomen, we examined the effect of unilateral efferent duct ligation on the expression. Two weeks after the operation, a relatively decreased expression of 1.8 kb transcript, increased expression of other transcripts, and degeneration of germ cells were observed in the efferent duct-ligated testes. As these changes were similar to those seen in abdominal testes of cryptorchid rats, exposure of Leydig cells to high temperature was not responsible for the changes in expression pattern of LH receptor mRNA. To examine the correlation between the changes in the receptor mRNA expression and the degeneration of seminiferous epithelium, expression of the mRNA was analyzed in unilaterally cryptorchid rats for 28 days after the operation. In scrotal testes which showed no hi...
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