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Full-Text Articles in Animal Sciences
The Relation Of Fat Tissue Hormones And Some Galactopoietic Hormones With Milk Yield In Holstein And Simmental Cows, Zennure Demi̇r, Devri̇m Saripinar Aksu
The Relation Of Fat Tissue Hormones And Some Galactopoietic Hormones With Milk Yield In Holstein And Simmental Cows, Zennure Demi̇r, Devri̇m Saripinar Aksu
Turkish Journal of Veterinary & Animal Sciences
The present study was conducted to investigate the physiological changes in leptin, adiponectin, and ghrelin hormones, which are effective in the regulation of energy metabolism, and the galactopoietic hormones including growth hormone (GH), insulin, insulin-like growth factor-I (IGF-I), cortisol, thyroid stimulating hormone (TSH) and thyroxine (T4 ) levels, which are also effective in the regulation of metabolic activities and their correlation with milk yield levels in Holstein and Simmental cows with low, medium, and high milk yield. Holstein (n = 30) and Simmental cows (n = 30) with low, medium, and high milk yield were used. Cows were divided into …
The Relationship Of Leptin And Thyroid Hormones With Milk Yield And Some Fertilityparameters In Simmental Dairy Cows During Transition Period, Özkan Duru, Alparslan Kadi̇r Devri̇m, Hasan Ceyhun Macun, Si̇bel Yasa Duru, Ali̇ Şenol
The Relationship Of Leptin And Thyroid Hormones With Milk Yield And Some Fertilityparameters In Simmental Dairy Cows During Transition Period, Özkan Duru, Alparslan Kadi̇r Devri̇m, Hasan Ceyhun Macun, Si̇bel Yasa Duru, Ali̇ Şenol
Turkish Journal of Veterinary & Animal Sciences
In this study, transition period cows were used to test the hypothesis that serum levels of leptin and thyroid hormones would correlate the production efficiency such as milk yield, body condition score, and fertility in dairy cows raised under the same controlled conditions. The study comprised 37 Simmental cows, which were 3 years old and between 257-265 days of gestation. Serum levels of leptin, T3, T4, FT3, and FT4 hormones were measured in blood samples obtained from the animals, which were in the period of 3 weeks before and 3 weeks after delivery. Prepartum serum leptin levels were significantly (p < 0.05) lower in cows having increased milk production compared to the first lactation peak value. Also, postpartum serum FT3 levels were significantly (p < 0.05) lower in cows having milk yield of ≥ 30 kg. Leptin levels were found to be inversely related with milk production and fertility. FT3 levels exhibited a negative correlation with milk production and similarly T3 levels showed an inverse correlation with body condition score. The present study proposed that routine monitoring of leptin and thyroid hormones would be useful for the reproductive management of cows with breeding problems.
Effect Of Supplementing Additives In Leptin-Enriched Maturation Medium During In Vitro Maturation And Vitrification Of Goat Oocytes, Reema Talukdar, Ranjan Kumar Biswas, Govindasamy Kadirvel, Bharat Chandra Deka, Sudip Sinha, Lukumoni Buragohain, Birina Bora
Effect Of Supplementing Additives In Leptin-Enriched Maturation Medium During In Vitro Maturation And Vitrification Of Goat Oocytes, Reema Talukdar, Ranjan Kumar Biswas, Govindasamy Kadirvel, Bharat Chandra Deka, Sudip Sinha, Lukumoni Buragohain, Birina Bora
Turkish Journal of Veterinary & Animal Sciences
The present study aimed to evaluate the effect of supplementing epidermal growth factor (EGF), insulin-like growth factor-I (IGF-I), fetal bovine serum (FBS), and bovine serum albumin (BSA) in different combinations in a maturation medium (MM) comprising TCM-199 + 5 µg/mL 17-ß estradiol + 5 µg/mL ovine-luteinizing hormone (oLH) + 5 µg/mL pure follicle-stimulating hormone (pFSH) + 100 µM/mL cysteamine containing the best concentration of leptin among 10/20/25/30 ng/mL on in vitro maturation (IVM) and subsequent vitrification of matured goat oocytes. The IVM of oocytes was carried out in a CO2 incubator for 27 h at 38.5 °C. The percentage of …
Leptin Supplementation In Embryo Culture Medium Increases In Vivo Implantation Rates In Mice, Ali̇ Ci̇han Taşkin, Ahmet Kocabay
Leptin Supplementation In Embryo Culture Medium Increases In Vivo Implantation Rates In Mice, Ali̇ Ci̇han Taşkin, Ahmet Kocabay
Turkish Journal of Veterinary & Animal Sciences
Leptin is a hormone-like protein consisting of 167 amino acids. The aim of this study is to compare the effects of different leptin concentrations on in vitro and in vivo embryo development rates. In vitro development rates were investigated by embryo culture studies, and in vivo implantation rates and the quality of embryos were assessed by embryo transfers to the recipient mice. The results showed that addition of leptin into the embryo culture medium at 10 and 100 ng/mL doses supported the in vitro development of mouse embryo. Moreover, leptin increased the total cell number of blastocyst, particularly the trophectoderm …
Comparison Of Pre- And Postpartum Serum Leptin, Ghrelin, And Lipid Levels In Sheep, Ethem Mutlu Temi̇zel, Hüseyi̇n Ci̇han, Pinar Levent, Ahmet Saril, Yeşi̇m Özarda, Zeki̇ Yilmaz
Comparison Of Pre- And Postpartum Serum Leptin, Ghrelin, And Lipid Levels In Sheep, Ethem Mutlu Temi̇zel, Hüseyi̇n Ci̇han, Pinar Levent, Ahmet Saril, Yeşi̇m Özarda, Zeki̇ Yilmaz
Turkish Journal of Veterinary & Animal Sciences
Serum leptin and ghrelin play important roles in energy metabolism and inducing appetite during pregnancy and lactation. We investigated the serum levels of leptin and ghrelin and their relationship with the duration of lactation and serum biochemical responses during the prepartum (last week before lambing) and postpartum periods in sheep. They were also evaluated between pregnant and nonpregnant (control ewes) ewes. For these purposes, pregnant (n = 15) and control Awassi ewes (n = 15) that were 2 years of age were used in this study. Blood samples were collected 1 week before the expected date of lambing (baseline) and …
The Effect Of Feeding Frequency On The Hormonal Profile, Carcass Characteristics, And Feedlot Performance In Iranian Holstein Calves, Armin Towhidi, Aboulfazl Zali, Abbas Khoshsokhan, Homayoon Khazali, Mehdi Zhandi, Kamran Rezayazdi, Reza Masoumi, Hamid Gholami
The Effect Of Feeding Frequency On The Hormonal Profile, Carcass Characteristics, And Feedlot Performance In Iranian Holstein Calves, Armin Towhidi, Aboulfazl Zali, Abbas Khoshsokhan, Homayoon Khazali, Mehdi Zhandi, Kamran Rezayazdi, Reza Masoumi, Hamid Gholami
Turkish Journal of Veterinary & Animal Sciences
The aim of the present study was to investigate the effect of feeding frequency on body weight, carcass characteristics, and hormonal profile in Iranian Holstein calves. The study included 12 Holstein bull calves that were assigned to 2 groups according to initial live body weight. The animals were fed a TMR ration based on live body weight. The calves were fed a standard diet for 31 weeks; control calves were fed twice a day and treatment calves were fed 7 times a day. Live body weights were recorded every 21 days. Blood samples were collected 1 h after the final …
Effect Of Leptin Gene Polymorphisms On Milk Production Traits Of Jersey Cows, Hanna Kulig, Marek Kmiec, Inga Kowalewska Luczak, Gabriela Andziak
Effect Of Leptin Gene Polymorphisms On Milk Production Traits Of Jersey Cows, Hanna Kulig, Marek Kmiec, Inga Kowalewska Luczak, Gabriela Andziak
Turkish Journal of Veterinary & Animal Sciences
A total of 181 Jersey cows were used to investigate how leptin gene polymorphisms affect milk production traits such as milk yield, fat and protein yield, and fat and protein content. Two single-nucleotide polymorphisms (SNPs) were genotyped, including the A59V in exon 3 and Sau3AI in intron 2. The genotype, allele, and haplotype frequencies were estimated. Statistical analysis revealed that the A59V polymorphism significantly affected the milk, protein, and fat yield (P Keywords: Leptin, SNP, Jersey cows, milk production traits