Dietary Cellulose, Wheat Bran, and Fish Meal in Relation to Hepatic Lipids, Serum Lipids, and Lipid Excretion in Laying Hens

Abstract

Isonitrogenous diets supplemented with 10% cellulose, 10% wheat bran, or 10% fish meal were fed to White Leghorn hens from 245 to 322 days of age. Neither body weights nor egg production of the hens fed these diets differed significantly from those of controls fed a corn-soybean meal basal diet. Supplemental fish meal and wheat bran did not significantly affect liver weight or liver lipids, although serum lipids of the hens fed the diet containing fish meal were significantly lower than those of the hens fed the basal diet. The hens fed the cellulose-supplemented diet, however, exhibited significantly decreased liver weights, serum lipids, and liver lipids, which were accompanied by a significant increase in excreta lipid. It is speculated that lipid excretion may be involved in some dietary induced alterations in the hepatic lipid concentration of laying chickens.

Growth Performance, Organ Weights and Some Blood Parameters of Replacement Laying Pullets Fed with Increasing Levels of Wheat Bran

“…Our results are consistent with the findings of Cherry & Jones (1982) and Rieckhoff et al (1999), who did not observe any reduction of blood cholesterol values when feeding WB to laying pullets and hamsters, respectively, as well as with those reported by McNaughton (1978), who did not detect any serum cholesterol changes when increasing fiber level in the diet of laying hens.…”

“…According to Connor et al (1969), lipid digestion and transport to the liver in poultry greatly differs from mammals, especially cholesterol, which is stored in the liver of newly-hatched chicks, whereas it is stored in brain of newly-born mammals. Similar results were reported by Cherry & Jones (1982), Aguilar et al (2011), andMartínez et al (2013b), when including high concentrations of polyunsaturated fat in the diets of the chickens.…”

Effects of dietary nanocrystalline cellulose supplementation on growth performance, carcass traits, intestinal development and lipid metabolism of meat ducks

“…(2010) also found that the inclusion of 1% inulin in diets decreased lipid concentration in the liver of broilers, and linearly reduced serum TG without affecting serum cholesterol, HDL-C, or LDL-C concentrations. Laying hens fed a diet supplemented with 10% cellulose exhibited significantly decreased serum lipids and liver lipids, which were accompanied by a significant increase in excreta lipid ( Cherry and Jones, 1982 ). Dietary fiber reducing lipid deposition may be due to increased bile acid secretion, facilitating the emulsification of the dietary lipids in chicks ( Garrett and Young, 1975 , Krögdahl, 1985 ).…”

“…Morphological images of the liver sections were captured to determine the degree of lipid accumulation. The right lobe of the livers were collected into sample bags and immediately frozen at −20°C, freeze-dried, and ground through a 0.5 mm screen for later analysis of total hepatic lipid concentrations, as determined by ether extraction of moisture-free samples ( Cherry and Jones, 1982 ).…”