Increased iNOS gene expression in the granulosa layer of F1 follicle of over-fed and under-fed broiler breeder hens
Sheikh Ahmadi, A, Zaghari, M, Shivazad, M, Hassanpour, H, Towhidi, A
Revista Brasileira de Ciência Avícola
DATA DE PUBLICAÇÃO
To clarify the effects of high (20 and 40% more than normal) and low (20% less than normal) daily feed allowance on egg and body parameters, ovarian morphology and plasma glucose, cholesterol, triacylglycerol, leptin-like hormone, nitrite/nitrate and gene expression of inducible nitric oxide synthase (iNOS) in the granulosa layer of F1 follicle, broiler breeder hens (30-week-old) were fed for 30 days. Egg and body parameters significantly changed between treatments (p<0.05). Effect of different level of feed intake on ovarian morphology parameters was significant (p<0.05), except for white follicles. After 30 days of experiment, plasma nitrite/nitrate (as a index of plasma nitric oxide) and leptin-like hormone increased in FI+20% and FI+40% groups as compared to controls (p<0.05). Plasma level of leptin-like hormone also significantly (p<0.05) increased in FI+40% group. The relative amount of iNOS mRNA expression in the granulosa layer of F1 follicles was significantly higher in FI-20% and FI+40% groups than in control group only after 4 weeks of experiment. The amount of these elevations in the FI-20% and FI+40% groups were 32.4% and 60.9% respectively. It was concluded that iNOS gene is normally expressed in follicular granulosa cells of F1 follicle of broiler breeder hens 2-4 hours before ovulation. However, over- and underfeeding of hens increased iNOS expression in F1 follicle, which may be one of the atresia-inducing factors in hierarchical follicles as shown by the significant (p<0.05) increase of shrunken follicles in the ovary of over- and under-fed broiler breeder hens after 30 days of feeding.
- Increased plasma phenylacetic acid in patients with end-stage renal failure inhibits iNOS expression
- Leptin receptor in the chicken ovary: potential involvement in ovarian dysfunction of ad libitum-fed broiler breeder hens
- Efficacy of several Salmonella vaccination programs against experimental challenge with Salmonella gallinarum in commercial brown layer and broiler breeder hens
- Reversal of impaired wound repair in iNOS-deficient mice by topical adenoviral-mediated iNOS gene transfer.
- Effect of dietary aflatoxin on fertility, hatchability, and progeny performance of broiler breeder hens.