PMID- 16139340 OWN - NLM STAT- MEDLINE DCOM- 20060207 LR - 20061115 IS - 0065-1281 (Print) IS - 0065-1281 (Linking) VI - 107 IP - 4 DP - 2005 TI - Gonadotropin stimuli increase adrenodoxin immunoreactivity in the mitochondria of rat ovarian cells. PG - 269-77 AB - Adrenodoxin is a component of the electron transfer system for mitochondrial cytochrome P450 in steroidogenic cells. To elucidate whether the steroidogenic state can modulate the amount and the distribution of adrenodoxin in the mitochondria, we determined immunohistochemically the distribution of adrenodoxin and 3beta-hydroxysteroid dehydrogenase (3betaHSD) in ovaries of rats under hypo- and hyperfunctional states. In the ovaries of control rats, adrenodoxin was distributed in the cristae of round-shaped mitochondria of both interstitial and theca cells. In hypophysectomized rats, no adrenodoxin was found in the mitochondria of atrophied cells. Treatment of hypophysectomized rats with human chorionic gonadotropin (hCG) or Humegon restored immunostaining of adrenodoxin in the interstitial and theca cells, and rendered the vesicular cristae of C- or ring-shaped mitochondria surrounding the lipid droplets adrenodoxin-positive. The distribution of 3betaHSD activity detected by enzyme histochemistry in these ovaries matched well that of adrenodoxin immunostaining. Our results indicate that immunostaining intensity of adrenodoxin in the mitochondria reflects the steroidogenic state in rat ovarian cells. FAU - Izumi, Shin-Ichi AU - Izumi S AD - Division of Oral Cytology and Cell Biology, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1, Sakamoto, Nagasaki 852-8588, Japan. s-izumi@net.nagasaki-u.ac.jp FAU - Mitani, Fumiko AU - Mitani F LA - eng PT - Comparative Study PT - Journal Article DEP - 20050901 PL - Germany TA - Acta Histochem JT - Acta histochemica JID - 0370320 RN - 0 (Chorionic Gonadotropin) RN - 12687-22-8 (Adrenodoxin) RN - 61489-71-2 (Menotropins) RN - EC 1.1.- (3-Hydroxysteroid Dehydrogenases) SB - IM MH - 3-Hydroxysteroid Dehydrogenases/*metabolism MH - Adrenodoxin/*metabolism MH - Animals MH - Chorionic Gonadotropin/*pharmacology MH - Female MH - Humans MH - Hypophysectomy MH - Immunohistochemistry MH - Menotropins/pharmacology MH - Microscopy, Confocal/methods MH - Microscopy, Electron/methods MH - Mitochondria/drug effects/*metabolism/ultrastructure MH - Ovary/*cytology/drug effects/enzymology MH - Rats MH - Rats, Wistar EDAT- 2005/09/06 09:00 MHDA- 2006/02/08 09:00 CRDT- 2005/09/06 09:00 PHST- 2005/04/05 00:00 [received] PHST- 2005/06/14 00:00 [revised] PHST- 2005/06/28 00:00 [accepted] PHST- 2005/09/06 09:00 [pubmed] PHST- 2006/02/08 09:00 [medline] PHST- 2005/09/06 09:00 [entrez] AID - S0065-1281(05)00067-X [pii] AID - 10.1016/j.acthis.2005.07.001 [doi] PST - ppublish SO - Acta Histochem. 2005;107(4):269-77. doi: 10.1016/j.acthis.2005.07.001. Epub 2005 Sep 1.