Thyroid hormones concentrations during the mid-dry period: An early indicator of fatty liver in Holstein-Friesian dairy cows
Abstract
Relationship between postpartal fatty liver and thyroid gland activity during the peripartal and mid dry periods was studied. Twenty one dry cows were chosen. Blood samples were obtained on days -30, -2, and +12 related to calving and analized for thyroxine (T4) and triiodothyronine (T3). A T3/T4 ratio was calculated. Liver tissue samples were taken 12 d after calving and tested for the lipid content. Cows were divided into three groups: mild (<20% fat), moderate (20 to 30%), or severe fatty liver (>30%). Cows, that were affected with severe fatty liver, were hypothyroid prior to development of the condition due to lower T4 concentrations, and had significantly lower concentration of T3 and higher T3/T4 ratios than cows with mild and moderate fatty liver. Thus, hypothyroid state during mid-dry period may be an early indicator of postpartal fatty liver and may provoke T3/T4 ratio increase in this group of cows.
Source:
Journal of Thyroid Research, 2010, 2010, 897602-Publisher:
- Hindawi Limited
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Fakultet veterinarske medicineTY - JOUR AU - Šamanc, Horea AU - Stojić, Velibor AU - Kirovski, Danijela AU - Jovanović, M. AU - Cernescu, H. AU - Vujanac, Ivan PY - 2010 UR - https://vet-erinar.vet.bg.ac.rs/handle/123456789/740 AB - Relationship between postpartal fatty liver and thyroid gland activity during the peripartal and mid dry periods was studied. Twenty one dry cows were chosen. Blood samples were obtained on days -30, -2, and +12 related to calving and analized for thyroxine (T4) and triiodothyronine (T3). A T3/T4 ratio was calculated. Liver tissue samples were taken 12 d after calving and tested for the lipid content. Cows were divided into three groups: mild (<20% fat), moderate (20 to 30%), or severe fatty liver (>30%). Cows, that were affected with severe fatty liver, were hypothyroid prior to development of the condition due to lower T4 concentrations, and had significantly lower concentration of T3 and higher T3/T4 ratios than cows with mild and moderate fatty liver. Thus, hypothyroid state during mid-dry period may be an early indicator of postpartal fatty liver and may provoke T3/T4 ratio increase in this group of cows. PB - Hindawi Limited T2 - Journal of Thyroid Research T1 - Thyroid hormones concentrations during the mid-dry period: An early indicator of fatty liver in Holstein-Friesian dairy cows VL - 2010 SP - 897602 DO - 10.4061/2010/897602 ER -
@article{ author = "Šamanc, Horea and Stojić, Velibor and Kirovski, Danijela and Jovanović, M. and Cernescu, H. and Vujanac, Ivan", year = "2010", abstract = "Relationship between postpartal fatty liver and thyroid gland activity during the peripartal and mid dry periods was studied. Twenty one dry cows were chosen. Blood samples were obtained on days -30, -2, and +12 related to calving and analized for thyroxine (T4) and triiodothyronine (T3). A T3/T4 ratio was calculated. Liver tissue samples were taken 12 d after calving and tested for the lipid content. Cows were divided into three groups: mild (<20% fat), moderate (20 to 30%), or severe fatty liver (>30%). Cows, that were affected with severe fatty liver, were hypothyroid prior to development of the condition due to lower T4 concentrations, and had significantly lower concentration of T3 and higher T3/T4 ratios than cows with mild and moderate fatty liver. Thus, hypothyroid state during mid-dry period may be an early indicator of postpartal fatty liver and may provoke T3/T4 ratio increase in this group of cows.", publisher = "Hindawi Limited", journal = "Journal of Thyroid Research", title = "Thyroid hormones concentrations during the mid-dry period: An early indicator of fatty liver in Holstein-Friesian dairy cows", volume = "2010", pages = "897602", doi = "10.4061/2010/897602" }
Šamanc, H., Stojić, V., Kirovski, D., Jovanović, M., Cernescu, H.,& Vujanac, I.. (2010). Thyroid hormones concentrations during the mid-dry period: An early indicator of fatty liver in Holstein-Friesian dairy cows. in Journal of Thyroid Research Hindawi Limited., 2010, 897602. https://doi.org/10.4061/2010/897602
Šamanc H, Stojić V, Kirovski D, Jovanović M, Cernescu H, Vujanac I. Thyroid hormones concentrations during the mid-dry period: An early indicator of fatty liver in Holstein-Friesian dairy cows. in Journal of Thyroid Research. 2010;2010:897602. doi:10.4061/2010/897602 .
Šamanc, Horea, Stojić, Velibor, Kirovski, Danijela, Jovanović, M., Cernescu, H., Vujanac, Ivan, "Thyroid hormones concentrations during the mid-dry period: An early indicator of fatty liver in Holstein-Friesian dairy cows" in Journal of Thyroid Research, 2010 (2010):897602, https://doi.org/10.4061/2010/897602 . .