Harmat Levente, Nagy János, Somoskői Bence, Alpár Alán, Fekete Sándor György, Gáspárdy András
Experimental Farm, University of Veterinary Medicine Budapest, Dóra-major, 2225 Üllő, Hungary.
Game Management Landscape Centre, Hungarian University of Agriculture and Life Sciences, Kaposvár Campus, Malom utca 3, 7475 Bőszénfa, Hungary.
Vet Sci. 2024 Jul 11;11(7):310. doi: 10.3390/vetsci11070310.
The aim of this study is to obtain a more complete picture of blood plasma melatonin concentrations in the donkey mares. To this purpose, sampling and statistical processing were carried out in such a way that allowed the researchers to establish the annual and daily rhythms. Based on human observations, according to the hypothesis of the authors, the blood plasma melatonin concentration of pregnant individuals rises during the late gestational period, before parturition. To confirm this, the melatonin concentrations of pregnant and non-pregnant jennies were monitored and compared. In regard to the circannual rhythm, the significantly lowest midnight melatonin value (27.67 pg mL) was typical for the summer solstice. Under consideration of circadian changes, a significantly strongest melatonin production (45.16 pg mL) was observed on the night of the winter solstice ( < 0.001). Considering gestational age, the blood plasma melatonin concentration (around 38 pg mL) does not change as gestation progresses ( = 0.136). The results obtained in this studied population of the domestic ass usefully expand the little knowledge previously gathered about the development of the blood plasma melatonin concentrations of this species.
本研究的目的是更全面地了解母驴血浆褪黑素浓度情况。为此，进行了采样和统计处理，以便研究人员确定年度和每日节律。基于人类观察，根据作者的假设，怀孕个体的血浆褪黑素浓度在妊娠后期、分娩前会升高。为证实这一点，对怀孕和未怀孕的母驴的褪黑素浓度进行了监测和比较。关于年节律，夏至时午夜褪黑素值显著最低（27.67 pg/mL）。考虑到昼夜变化，冬至当晚观察到褪黑素分泌显著最强（45.16 pg/mL）（P<0.001）。考虑到胎龄，随着妊娠进展，血浆褪黑素浓度（约38 pg/mL）没有变化（P = 0.136）。在本研究的家养驴群体中获得的结果有效地扩展了此前关于该物种血浆褪黑素浓度变化的少量认知。
