Effects of Testosterone on Hepatic Lipid Metabolism in the Mature Female Domestic Fowl

Pearce, John

doi:10.1677/joe.0.0750343

Cited by 8 publications

(7 citation statements)

References 8 publications

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“…Similarly, Prescott and Lamming (1964) showed that castration caused an increase in the back fat depth in pigs, cattle and sheep. The reduction in abdominal adipose tissue weight of the intact birds may be due to the effects of androgen on the total lipid tissue content or due to decreased lipogenic enzyme activity, as suggested by Pearce (1977). On the other hand, the reduction in the percentage of abdominal fat of the intact birds is also probably due to a higher thyroxine concentration, as suggested by Stewart and Washburn (1983).…”

Section: Resultsmentioning

confidence: 89%

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Influence of Caponization on the Carcass Characteristics in Taiwan Country Chicken Cockerels

Lin¹,

Hsu²

2003

Asian Australas. J. Anim. Sci

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We determined the effect of caponization on the carcass and giblet characteristics, and skin and muscle color in Taiwan country chicken cockerels. Caponized birds were surgically altered at 10 weeks old and were fed growing and finishing diets ad libitum during an eighteen-week experimental period. The results showed that the percentage of dressing, heart, feet, thigh, head and neck were significantly (p<0.05) higher in the intact birds, while the capons had a higher (p<0.05) percentage of abdominal fat, intestine, back, wing and breast. Eviscerated weight, breast width, gizzard, liver and spleen ratios were not affected by the treatments. The breast skin color values for lightness (L*) and yellowness (b*) values in the capons were significantly (p<0.05) higher than in the intact birds, but the thigh and back skin were not significantly(p>0.05)different. Compared with the intact birds, the capons had a significantly (p<0.05) less redness (a*) values in the back skin, but were not significantly (p>0.05) different in the breast and thigh skin. The L* value of the thigh muscle was significantly (p<0.05) greater in the capons than in the intact birds, but were not significantly (p>0.05) different in breast and back muscles. The b* values in the breast, back and thigh muscles of the capons were significantly (p<0.05) greater whereas the intact birds had a higher (p<0.05) a* values in the breast, back, and thigh muscles. Moreover, our findings also indicate that the castration resulted in a significant alteration in dressing percentage, carcass region and organ percentage.

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Section: Resultsmentioning

confidence: 89%

“…The reduction in the dressing percentage of the capons is probably due to the increased deposition of lipids around giblets. Pearce (1977) demonstrated that androgen could decrease lipogenic enzyme activity in fowl.…”

Section: Resultsmentioning

confidence: 99%

Influence of Caponization on the Carcass Characteristics in Taiwan Country Chicken Cockerels

Lin¹,

Hsu²

2003

Asian Australas. J. Anim. Sci

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“…As compared to mammals, the main site of lipogenesis in chicken is the liver [ 35 ] and the late reduction in fat mass in Rt animals was associated with different gene expression depending on the type of metabolic tissue. On the one hand, Rt diet-induced lipogenesis ( FASN ) was positively correlated with a decrease in RARRES2 and its receptors CMKLR1 in AT abd, and promoted the transport of fat ( FATP1 ) and glucose ( GLUT8 ) in AT sc associated with an increase in ADIPOQ , CMKLR1 and CCRL2 expression.…”

Section: Discussionmentioning

confidence: 99%

Effect of different levels of feed restriction and fish oil fatty acid supplementation on fat deposition by using different techniques, plasma levels and mRNA expression of several adipokines in broiler breeder hens

et al. 2018

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BackgroundReproductive hens are subjected to a restricted diet to limit the decline in fertility associated with change in body mass. However, endocrine and tissue responses to diet restriction need to be documented.ObjectiveWe evaluated the effect of different levels of feed restriction, with or without fish oil supplementation, on metabolic parameters and adipokine levels in plasma and metabolic tissues of reproductive hens.MethodsWe designed an in vivo protocol involving 4 groups of hens; RNS: restricted (Rt) unsupplemented, ANS: ad libitum (Ad, receiving an amount of feed 1.7 times greater than animals on the restricted diet) unsupplemented, RS: Rt supplemented, and AS: Ad supplemented. The fish oil supplement was used at 1% of the total diet composition.ResultsHens fed with the Rt diet had a significantly (P < 0.0001) lower growth than Ad hens, while the fish oil supplementation had no effect on these parameters. Furthermore, the bioelectrical impedance analysis (BIA) and the fat ultrasonographic examinations produced similar results to the other methods that required animals to be killed (carcass analysis and weight of adipose tissue). In addition, the Rt diet significantly (P < 0.05) decreased plasma levels of triglycerides, phospholipids, glucose and ADIPOQ, and fish oil supplementation decreased plasma levels of RARRES2. We also showed a positive correlation between insulin values and ADIPOQ or NAMPT or RARRES2 values, and a negative correlation of fat percentage to RARRES2 values. Moreover, the effects of the Rt diet and fish oil supplementation on the mRNA expression depended on the factors tested and the hen age.ConclusionsRt diet and fish oil supplementation are able to modulate metabolic parameters and the expression of adipokines and their receptors in metabolic tissue.

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“…In avian species liver is the principal site of denovo fatty acid synthesis (Griffin et al, 1992;Pearce, 1977). Only 15% of the denovo lipogenesis occurs in adipose tissue and the rest occurs in liver (Griffin et al, 1992;Whitehead and Griffin, 1984).…”

Section: Introductionmentioning

confidence: 99%

Expression of Stearoyl Co-enzyme A desaturase (SCD) gene during the juvenile age in layer chicken

Sagar

Bhattacharya

Prasad

et al. 2019

IJAR

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Stearoyl-CoA desaturase (SCD) is key enzyme in the production of triglycerides and cholesterol. Present study was conducted to know the expression pattern of the Stearoyl-CoA desaturase (SCD) gene in liver during juvenile age (0 day, 14th day, 28th day and 42nd day) in layer birds. Expression of SCD gene increased from the day of hatch to 42nd day, as the body weight and fat deposition increased. The mRNA expression levels of SCD gene during day 0 was differed significantly (P less than 0.05) with expression levels during other juvenile ages. When compared with SCD expression levels on the day 0 expression levels were up-regulated by 8198.64, 7245.99 and 5587.77 folds over day 14, 28 and 42 respectively. Serum concentration of triglycerides and cholesterol were found to be proportional to the expression levels of SCD gene in liver. It is concluded that SCD expression varied among different age groups during juvenile stages and had significant association with serum triglycerides and cholesterol concentration in layer chicken.

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Effects of Testosterone on Hepatic Lipid Metabolism in the Mature Female Domestic Fowl

Cited by 8 publications

References 8 publications

Influence of Caponization on the Carcass Characteristics in Taiwan Country Chicken Cockerels

Influence of Caponization on the Carcass Characteristics in Taiwan Country Chicken Cockerels

Effect of different levels of feed restriction and fish oil fatty acid supplementation on fat deposition by using different techniques, plasma levels and mRNA expression of several adipokines in broiler breeder hens

Expression of Stearoyl Co-enzyme A desaturase (SCD) gene during the juvenile age in layer chicken

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