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Localization of TGF-β1, ALK-5 and ALK-1 in testicular pathologies. Panel A: Immunostaining of TGF-β1 and ALK-5 in testicular pathologies. Panel B: Immunostaining in serial sections of ALK-1 and 3β-hydroxysteroid dehydrogenase (3β-HSD) in testicular pathologies. H: Hypospermatogenesis, SCO: Sertoli cell-only Syndrome, LCH: Leydig Cell Hyperplasia, ST: Seminiferous Tubules, LC: Leydig cell. Magnification 400 x.
