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Serum Leptin Levels During the Dry Period and Various Lactation Stages in Holstein Dairy Cows

Kuru Dönem ve Laktasyonun Çeşitli Evrelerindeki Holstein Irkı Süt İneklerinde Serum Leptin Düzeyleri

Journal Name:

  • Uludag University Journal of The Faculty of Veterinary Medicine

Publication Year:

  • 2011

Key Words:

Keywords (Original Language):

Author NameUniversity of AuthorFaculty of Author
Abstract (2. Language): 
In this study we investigated the effects of dry period and various stages of lactation on serum leptin, glucose, total cholesterol and β hydroxybutyrate levels in Holstein dairy cows. Fourthy, four years old Holstein dairy cows in their second lactation were used as material. Ten of them were in dry period and the rest were in different stages of lactation periods (10 cows for each stages). Serum concentrations of leptin, glucose, total cholesterol and β hydroxybutyrate were compared between the dry period, and first, second and third stages of lactation period. Correlation between leptin and other parameters were analyzed. While no significant differ-ences were observed in β hydroxybutyrate levels, significant differences were determined for leptin, glucose and total cholesterol levels between dry period and first, second, and third stages of lactation period (p<0.05, p<0.001, and p<0.001, respectively). Statistically significant positive correlations were observed between leptin and glucose concentrations.(r =0,401, p<0.01 ).
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Abstract (Original Language): 
Bu çalışmada Holstein ırkı süt ineklerinde kuru dönem ve laktasyonun çeşitli evrelerinin serum leptin, glukoz, total kolesterol ve β hidroksi bütirat düzeyleri üzerine etkisi araştırıldı. Materyal olarak 40 adet, ikinci laktasyon döneminde olan, 4 yaşında holstein ırkı süt ineği kullanıldı. İneklerin 10 tanesi kuru dönemde, geri kalanlar ise laktasyon periyodunun çeşitli evrelerindeydiler (her evrede 10 inek). Kuru dönem ve laktasyonun I., II., ve III. evreleri arasında serum leptin, glukoz, total kolesterol ve β hidroksi bütirat konsantrasyonları karşılaş-tırıldı. Leptin ve diğer parametreler arasındaki korelasyonlar analiz edildi. Kuru dönem ve laktasyon periyodu-nun I., II., ve III. evreleri arasında β hidroksi bütirat düzeylerinde önemli bir farklılık gözlenmezken, leptin, glukoz ve total kolesterol düzeylerinde önemli farklılıklar ortaya koyuldu (p<0.05, p<0.001, and p<0.001, sıra-sıyla). Leptin ve glukoz konsantrasyonları arasında istatistiki olarak pozitif bir korelasyon olduğu ortaya koyuldu (r =0,401, p<0.01 ).
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  • Turkish

REFERENCES

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