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Sex and age differences in the specific activity of NAD⁺-dependent 15-hydroxyprostaglandin dehydrogenase in human fetal kidney tissue

Summary. The specific activity of NAD⁺-dependent 15-hydroxyprostaglandin dehydrogenase (PGDH) was significantly greater (P < 0·005) in human kidney tissue obtained from male abortuses aged 10–16 weeks after conception than in female abortuses of the same gestational age and in younger male and female abortuses. There was a significant correlation (r = 0·93, P < 0·001) between the specific activity of PGDH in fetal kidney and testicular tissues obtained from human abortuses of 10–26 weeks gestational age. These results suggest a role for testosterone in the regulation of PGDH activity in the fetal kidney.