| dc.description.abstract | In this study, leptin, ghrelin, irisin and insulin hormone levels in milk serum and
blood plasma, and non-esterified fatty acids (NEFA), beta hydroxy butyric acid
(BHBA), triglyceride and glucose levels in blood plasma which are involved in
energy, carbohydrate and fat metabolism were determined in the first week of the
early lactation period of seven Holstein cattle aged between 3-6 years old. Blood
and milk samples were taken from cattle immediately after calving (0th hour) and
on 3rd and 7th postpartum days. In the findings, both plasma ghrelin, leptin, insulin,
and milk irisin values were statistically different (p < 0.05) between 0th hour and
3rd day, between 3rd day and 7th day measurements. Both plasma irisin and milk
leptin values were statistically different (p < 0.05) between 0th hour and 3rd day,
between 0th hour and 7th day, and between 3rd day and 7th day measurements. In
addition, when milk ghrelin, irisin, insulin and plasma NEFA and glucose values
were examined, a statistical difference was found between 0th hour data and 3th
day data, and between 0th hour data and 7th day data (p < 0.05) of each parameter.
In conclusion, in this study, differences in blood plasma and milk serum levels of
metabolic hormones were noted in the first week of the early lactation period. It
has been determined that the newly discovered irisin hormone increases in the
first week of the early lactation period after birth. Although, there is no statistically significant relationship, determined negative correlation between plasma
irisin hormone and plasma glucose value shows that irisin hormone plays a role
in energy homeostasis and is a regulator of glucose metabolism. | en_US |
