Ultrastructural studies on the mitochondria of the pinealocyte under conditions of persistent lighting--L24.
Rat pinealocytes were found to contain mitochondria in three configurational states and they were calculated at 11.00 a.m. and 11.00 p.m. Their proportions were found to change in 24 hours. Analysis of these results indicated the existence of correlation between pinealocyte bioenergetics and melatonin biosynthesis and its lack in relation to serotonin. Cell groupings with mitochondria in the same configurational state were observed, which suggest the existence of functionally differentiated zones within the pineal gland.
D000818:Animals; D002940:Circadian Rhythm; D004734:Energy Metabolism; D008027:Light; D008297:Male; D008550:Melatonin / Q000096:biosynthesis; D051379:Mice; D008928:Mitochondria / Q000528:radiation effects* / Q000648:ultrastructure; D010870:Pineal Gland / Q000378:metabolism / Q000528:radiation effects* / Q000648:ultrastructure; D051381:Rats; D011919:Rats, Inbred Strains; D012701:Serotonin / Q000096:biosynthesis
D012701:Serotonin; D008550:Melatonin