Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Analysis of the mechanism underlying the rhythm reversal from diurnal to nocturnal in the cricket Gryllus bimaculatus, with special reference to the role of serotonin
Autore:
Nishinokubi, I; Tomioka, K;
Indirizzi:
Yamaguchi Univ, Fac Sci, Dept Phys Biol & Informat, Yamaguchi 7538512, Japan Yamaguchi Univ Yamaguchi Japan 7538512 nformat, Yamaguchi 7538512, Japan Yamaguchi Univ, Res Inst Time Studies, Yamaguchi 7538512, Japan Yamaguchi Univ Yamaguchi Japan 7538512 Studies, Yamaguchi 7538512, Japan
Titolo Testata:
ZOOLOGICAL SCIENCE
fascicolo: 8, volume: 17, anno: 2000,
pagine: 1075 - 1080
SICI:
0289-0003(200011)17:8<1075:AOTMUT>2.0.ZU;2-A
Fonte:
ISI
Lingua:
ENG
Soggetto:
CIRCADIAN LOCOMOTOR RHYTHM; CENTRAL-NERVOUS-SYSTEM; OPTIC LOBE; SUPRACHIASMATIC NUCLEUS; NEURAL ACTIVITY; VISUAL-SYSTEM; PACEMAKER; INVITRO;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
25
Recensione:
Indirizzi per estratti:
Indirizzo: Tomioka, K Yamaguchi Univ, Fac Sci, Dept Phys Biol & Informat, Yamaguchi 7538512, Japan Yamaguchi Univ Yamaguchi Japan 7538512 maguchi 7538512, Japan
Citazione:
I. Nishinokubi e K. Tomioka, "Analysis of the mechanism underlying the rhythm reversal from diurnal to nocturnal in the cricket Gryllus bimaculatus, with special reference to the role of serotonin", ZOOL SCI, 17(8), 2000, pp. 1075-1080

Abstract

The cricket, Gryllus bimaculatus, shows a rhythm reversal from diurnal to nocturnal in about a week after the imaginal molt. In the present study, weinvestigated the role of serotonin (5-HT) in the rhythm reversal. The 5-HTcontent in the brain measured by HPLC equipped with an electrochemical detector gradually increased after the imaginal molt, and in fully nocturnal adults it was about 2 times of nymphal level. We then examined the effects of 5,7-dihydroxytryptamine (5,7-DHT), a selective neurotoxine to serotonergic neurons, on the locomotor rhythm. In most animals with 5,7-DHT (25 muM or250 muM, 32.2 nl) injected into the brain, daytime activity significantly increased even after the rhythm reversal, while nighttime activity was not significantly affected, forming rather diurnal pattern. The serotonin content in the brain of animals injected with 250 muM 5,7-DHT was reduced by about 30%. On the basis of these results, possible involvement of 5-HT in the neural mechanism controlling the locomotor rhythm is discussed.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 23/01/20 alle ore 06:27:23