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Demonstration of a role for insulin in the regulation of leptin in lactating dairy cows1
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ABSTRACT
In lactating dairy cows, the onset of negative net energy balance (EB) at parturition causes a reduction in plasma leptin and is also associated with increased concentration of growth hormone (GH) and decreased concentration of insulin. These observations raise the possibility that opposite changes in plasma insulin and GH are partly responsible for reduced plasma leptin. To test this hypothesis, we first examined the effects of undernutrition without the confounding influence of parturition by using late lactating dairy cows fed 120% of their nutrient requirements or restricted to ...
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Nutritional and developmental regulation of plasma leptin in dairy cattle1
; ...mammalian life. In growing dairy cattle, plasma leptin has been proposed as a partial mediator...which the plane of nutrition increases plasma leptin has not been well defined. Further...the onset of puberty is affected by plasma leptin concentration in dairy cattle. To investigate...
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Plasma Leptin Is Regulated Predominantly by Nutrition in Preruminant Lambs1
; ...the timing of these influences on plasma leptin, and their relative importance in early...are unknown. We investigated these plasma leptin influences in sheep, a species characterized...weight. Birth size had no effect on plasma leptin concentrations and adiposity at birth...
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Postoperative plasma leptin levels in women undergoing suction lipectomy
; ...positively correlated with adiposity. Plasma leptin levels are markedly reduced by biliopancreatic...described.6 Results,For all 4 patients, plasma leptin concentration correlated well with...97; P=.02) at baseline. However, the plasma leptin level did not correlate with the waist...
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Do catecholamines influence the level of plasma leptin in patients with phaeochromocytoma?
; ABSTRACT The relationship between plasma leptin and catecholamine concentrations during...were used (n=23) for the basal study. Plasma leptin was determined by radioimmunoassay...coefficient. Gender-related differences in plasma leptin in normal subjects was confirmed, and...
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Effect of Body Fatness and Glucogenic Supplement on Lipid and Protein Mobilization and Plasma Leptin in Dairy Cows
; ...and protein mobilization and plasma hormone concentrations. Eight...calving approached and had higher plasma nonesterified fatty acids during...mobilization. Fatter cows had higher plasma leptin concentration prepartum, showed...near calving, and had higher plasma leptin ...
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Dietary (n-3) polyunsaturated fatty acids up-regulate plasma leptin in insulin-resistant rats
; ...Polyunsaturated Fatty Acids Up-Regulate Plasma Leptin in Insulin-Resistant Rats1,2 ABSTRACT...evaluate the chronic regulation of plasma leptin by dietary (n-3) polyunsaturated fatty...and 6 wk of consuming the SF diet, plasma leptin was 70% (P < 0.001) and 75% (P...
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Response of Plasma Leptin Concentration to Jugular Infusion of Glucose or Lipid Is Dependent on the Stage of Lactation of Holstein Cows1
; ...did not affect plasma leptin and insulin-like...did not affect plasma leptin, insulin and IGF...glucose * lipid * dairy cows Leptin, a hormone...reported to reduce plasma leptin concentrations...early-lactating dairy cows, but this response...regulation of ...
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Fetal and maternal plasma leptin levels during the second half of normal pregnancies and those with Down syndrome
; ...the correlation of fetal and maternal plasma leptin concentrations during the second half...p < 0.001, respectively). Fetal plasma leptin concentrations also correlated with...fetuses had significantly lower fetal plasma leptin levels than gestational age-matched...
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Soyhulls as an alternative feed for lactating dairy cows: A review
; ...grain or forage in diets of lactating dairy cows. In view of the nutritional and economical...digestion and utilization, and performance of dairy cows. Soyhulls can replace corn grain to supply...gastrointestinal tract or the performance of dairy cows. Additionally, data suggest that ...
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Plasma leptin in postmenopausal women with coronary artery disease: Effect of transdermal 17[beta]-estradiol and intermittent medroxyprogesterone acetate
; ...present study, the relationship between plasma leptin and other cardiovascular risk factors...medroxyprogesterone acetate (MPA) on plasma leptin. Methods Postmenopausal women (n...estradiol combined with MPA. Conclusion Plasma leptin is related to other cardiovascular...
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