A decrease in the total number of sperm cells and reduction of spermatogonium population were observed upon cytostatic damage of spermatogenous tissue caused by single paclitaxel administration. It was established that the paclitaxel-induced damage to the testicular tissue is underlain by reduction of its regenerative potential consisting in depletion of regional precursor pool. Changes in functional activity of progenitor cells were caused not only by direct action of paclitaxel, but also by suppression of the secretory function of the tissue microenvironment.
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