The effects of pinealectomy and melatonin implants on circadian locomotor activity responses of the mongolian gerbils exposed to rapid photoperiodic transitions
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Tarih
2010
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Ege University Press
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
The jet-lag syndrome and the shift-work malaise take place by rapid changes in photoperiod and disturb people's life frequently. In the present study; we wanted to simulate these conditions. Control, pinealectomized and melatonin including silastic tube implanted Mongolian gerbils were respectively exposed into long (14L:10D), short (8L:16D), constant darkness (0L:24D) and constant light (24L:0D) photoperiods in order to investigate the effects of photoperiod, pineal gland and melatonin hormone in the photoperiodic reentrainment of this species. Gerbils showed an light/dark cycle entrained locomotor activity rhythm in long and short photoperiods, free-running in constant darkness and arrhythmic locomotor activity in constant light. The period lengths were similar to each other in the groups (p>0,05). Gerbils were reentrained by the changes in photoperiod nevertheless pinealectomy and melatonin implants did not make any significant influence on this reentrainment (p>0,05). Locomotor activity amounts varied in a group-photoperiod-dependent manner. These data suggest that photoperiod but not the pineal gland and constant release melatonin hormone is effective on the activity rhythm of the Mongolian gerbil.
Açıklama
Anahtar Kelimeler
Jet-lag; Melatonin; Mongolian gerbil; Photoperiod; Pineal gland; Shift-work malaise
Kaynak
Journal of Neurological Sciences
WoS Q Değeri
Scopus Q Değeri
N/A
Cilt
27
Sayı
4
