Expression of aromatase, estrogen receptor alpha and beta, androgen receptor, and cytochrome P-450scc in the human early prepubertal testis.
The expression of aromatase, estrogen receptor alpha (ERalpha) and beta (ERbeta), androgen receptor (AR), and cytochrome P-450 side chain cleavage enzyme (cP450scc) was studied in prepubertal testis. Samples were divided in three age groups (GRs): GR1, newborns (1- to 21-d-old neonates, n = 5); GR2, postnatal activation stage (1- to 7-mo-old infants, n = 6); GR3, childhood (12- to 60-mo-old boys, n = 4). Absent or very poor detection of ERalpha by immunohistochemistry in all cells and by mRNA expression was observed. Leydig cells (LCs) of GR1 and GR2 showed strong immunostaining of aromatase and cP450scc but weak staining of ERbeta and AR. Interstitial cells (ICs) and Sertoli cells (SCs) expressed ERbeta, particularly in GR1 and GR2. Strong expression of AR was found in peritubular cells (PCs). For all markers, expression in GR3 was the weakest. In germ cells (GCs), i.e. gonocytes and spermatogonia, aromatase and ERbeta were immunoexpressed strongly whereas no expression of ERalpha, AR, or cP450scc was detected. It is proposed that in newborn and infantile testis, testosterone acting on PCs might modulate infant LC differentiation, whereas the absence of AR in SCs prevents development of spermatogenesis. The role of estrogen is less clear, but it could modulate the preservation of an adequate pool of precursor LCs and GCs.
Berensztein
Esperanza B
EB
Research Laboratory, Hospital de Pediatria Garrahan, Buenos Aires C124 5AAM, Argentina.
Baquedano
María Sonia
MS
Gonzalez
Candela R
CR
Saraco
Nora I
NI
Rodriguez
Jorge
J
Ponzio
Roberto
R
Rivarola
Marco A
MA
Belgorosky
Alicia
A
D001141:Aromatase / Q000235:genetics / Q000378:metabolism*; D002454:Cell Differentiation; D002675:Child, Preschool; D002786:Cholesterol Side-Chain Cleavage Enzyme / Q000235:genetics / Q000378:metabolism*; D047628:Estrogen Receptor alpha / Q000235:genetics / Q000378:metabolism*; D047629:Estrogen Receptor beta / Q000235:genetics / Q000378:metabolism*; D005786:Gene Expression Regulation; D015971:Gene Expression Regulation, Enzymologic; D005854:Germ Cells / Q000378:metabolism; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007985:Leydig Cells / Q000378:metabolism; D008297:Male; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D011944:Receptors, Androgen / Q000235:genetics / Q000378:metabolism*; D012708:Sertoli Cells / Q000378:metabolism; D013737:Testis / Q000378:metabolism*
D047628:Estrogen Receptor alpha; D047629:Estrogen Receptor beta; D012333:RNA, Messenger; D011944:Receptors, Androgen; D001141:Aromatase; D002786:Cholesterol Side-Chain Cleavage Enzyme