Contribution of lipoprotein lipase to differences in fatness between broiler and layer‐strain chickens

Abstract

The growth of abdominal fat in chickens from broiler and layer-strains up to 10 weeks of age was measured and compared with changes in plasma very low density lipoprotein (VLDL) concentration and tissue lipoprotein lipase activities. The growth of abdominal fat in broilers was much more rapid than in layer-strain chickens. Plasma VLDL concentrations in the two strains were similar up to 5 weeks of age but thereafter concentrations tended to be higher in broilers. Plasma VLDL concentrations in both strains were much lower than those necessary for maximum lipoprotein lipase activity. The lipoprotein lipase activity of abdominal fat increased much more rapidly in broilers than in layer-strain chickens. In both strains the pattern of its increase relative to body weight was similar to that of abdominal fat. Differences in the lipoprotein lipase activity of abdominal fat between strains were attributed to differences in both activity/adipocyte and number of adipocytes. They were reduced or abolished if activity was expressed relative to tissue weight, or to its content of DNA or protein. The results strongly suggest that the greater lipoprotein lipase activity of the abdominal fat pad in broilers is an important factor in its rapid growth.

Association of SNPs in Intron 8 of Avian Lipoprotein Lipase Gene with Cholesterol, Triglyceride and Lipoprotein Concentrations

“…On the other hand, abnormalities in LPL function have been found t o be associated with obesity a n d increase in triglyceride concentrations (Mead et al, 2002). There is significant correlation between LPL activity in abdominal fat and fat pad weight in birds, it means that the abdominal fat pad depot in birds of the high VLDL line takes up lipoprotein-borne fatty acids at 6-8 times the rate of that in the low VLDL line (Griffin et al, 1987). Whereas, the between line difference in abdominal fat pad weight is only about 2.5-fold and differences i n total body f a t a r e much smaller (Whitehead and Griffin, 1984).…”

Genetic influences on growth and partition of fat between depots and its distribution in fowl carcasses

“…In (Leat and Cox, 1980 (Littlefield, 1972;Farr et al, 1977;March and Hansen, 1977;Van Middelkoop et al, 1977;Griffiths et al, 1978;Nordstrom et al, 1978;Mahmoud et al, 1985;Griffin et al, 1987) indicated that layer-type chickens were characterized by much less abdominal fat than broiler or dual-purpose type chickens.…”

“…The present study shows for the Hubbard, as compared to Fayoumi, distinct patterns of fat partitioning (higher non-carcass fat: carcass fat; higher intermuscular fat: subcutaneous fat) and distinct patterns of fat distribution (higher proportion of the total depot occurring in the prime cuts). The (Littlefield, 1972;Farr et al, 1977;Van Middelkoop et al, 1977;Griffiths et al, 1978;Nordstrom et al, 1978;Merkley et al, 1980), between layer-type and broiler type (March and Hansen, 1977;March, 1984;Griffin et al, 1987) and between dualpurpose and layer-type chickens (Mahmoud ef al, 1985).…”

Carry-over effects of dietary crude protein and triiodothyronine (T3) inbroiler chickens

“…At the time of slaughter at 56 d, the AFP were quickly removed and frozen at -80". Lipoprotein lipase (LPL: EC 3.1.1.34) was determined by modifications of the methods of Nilsson-Ehle & Schotz (1976), Quig et al (1983) and Griffin et al (1987). Preliminary experiments revealed that LPL was stable for at least 120 d in AFP stored at -80".…”