Małgorzata Berezińska

TL;DR: In an organism, aracidonic acid is converted to prostanoids series 2 (PGE2, PGI2, TXA2) and leukotrienes series 4 (LTB4, LTC4, LTD4) which are able to induce platelet aggregation and vasoconstriction and this group of eicosanoids shows anti-inflammatory, antiplatelet and antiarrhythmic properties.

TL;DR: In the turkey, photoperiod plays an important role in regulating the melatonin signal, and peak values of melatonin and AANAT activity in the pineal gland (but not in the retina) were highest during the longPhotoperiod.

TL;DR: Melatonin rhythmicity in the turkey pineal gland and retina is regulated both by light and the endogenous circadian clock, and the rapid dampening of the rhythms under DD suggests that of these two regulatory factors, environmental light may be the primary stimulus in the maintenance of the high amplitude melatonin rhythms in the Turkey.

TL;DR: Findings indicate that light activation of retinal dopaminergic neurotransmission, with concomitant stimulation of D1‐DA receptors positively coupled to the cAMP generating system, plays an important role in a cascade of events regulating pineal activity.

TL;DR: Melatonin rhythmicity in the turkey pineal gland and retina is regulated both by light and the endogenous circadian clock, suggesting that environmental light may be of primary importance in the maintenance of the high‐amplitude melatonin rhythms in the Turkey.