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Controlling plasma leptin level improves quality and productivity of beef

Controlling plasma leptin level improves quality and productivity of beef
控制血浆瘦素水平可提高牛肉的质量和生产率
批准号:
12460124
负责人:
YANO Hideo
金额:
$7.68万
依托单位:
依托单位国家:
日本
项目类别:
Grant-in-Aid for Scientific Research (B)
财政年份:
2000
资助国家:
日本
项目状态:
已结题
起止时间:
2000 至 2002

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中文摘要
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英文摘要
(1)We studied the changes of plasma leptin concentration during fattening in Japanese Black steers and heifers. We also examined the relationship between plasma leptin level and carcass traits. Plasma leptin concentration was increased during fattening period in the steers and heifers. Although there is no great difference between heifers and steers in the thickness of subcutaneous fat or beef marbling, plasma leptin concentration was higher in the heifers than in the steers. The steers showed the significant correlation between plasma leptin level just before slaughter and the thickness of subcutaneous fat or beef marbling that probably reflected body fat content. These results suggested that plasma leptin level possibly used as the index for the degree of fattening in the steers. On the other hand, plasma leptin level did not related to these carcass traits in the heifers.(2)We investigated leptin mRNA expression, adipocyte size, and their relationship in several adipose tissues of f … More attening steers. The intramuscular adipose tissues had a lower leptin mRNA level than the intermuscular and perirenal adipose tissues. The leptin mRNA level was lower in the subcutaneous depot than in the intermuscular depot. The adipocyte diameter was larger in the intermuscular adipose tissue than in the subcutaneous and the intramuscular adipose tissues. Leptin mRNA level was positively correlated to adipocyte diameter.(3)We investigated the influence of estrogen, sex steroid hormone, and genistein, soybean isoflavone, on leptin secretion and mRNA expression in bovine adipocytes. We also examined the effect of vanadium on leptin mRNA expression. Estrogen and genistein stimulated in leptin secretion from bovine adipocytes after 2 and 8 h of treatment. On the other hand, mRNA levels for leptin were increased by estrogen and genistein after 6 and 24 h of treatment, though 2 h of treatment did not significantly affect leptin mRNA synthesis. Low concentration of vanadium increased leptin gene synthesis, while high concentration decreased leptin expression prominently. Less
期刊论文(16)
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会议论文
Hiroyuki Kawachi: "Vanadium Stimulates leptin secretion from rat adipocytes"Japan Trace Nutrients Research Society. 18. 41-45 (2001)
Hiroyuki Kawachi:“钒刺激大鼠脂肪细胞分泌瘦素”日本微量营养素研究会。
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作者: []
通讯作者:
Seung Hak Yang: "Fat depot-specific differences in leptin mRNA expression and its relation to adipocyte size in steers"Animal Science Journal. 74・1. 17-21 (2003)
Seung Hak Yang:“瘦素mRNA表达的脂肪库特异性差异及其与脂肪细胞大小的关系”动物科学杂志74・1(2003)。
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通讯作者:
Tomomi Tokuda: "Blood leptin concentration in Japanese Black cattle"Animal Science. 72・2. 309-313 (2001)
德田朋美:“日本黑牛的血液瘦素浓度”动物科学72・2。
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作者: []
通讯作者:
Tomomi Tokuda: "Blood leptin concentrations in Japanese Black cattle"Animal Science. 72-2. 309-313 (2001)
Tomomi Tokuda:“日本黑牛的血液瘦素浓度”动物科学。
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通讯作者:
Development of superconducting motor producing circular flow of superfluid helium
  • 批准号:
    24654108
  • 项目类别:
    Grant-in-Aid for Challenging Exploratory Research
  • 资助金额:
    $2.41万
  • 财政年份:
    2012
  • 负责人:
    YANO Hideo
  • 依托单位:
Study of waves and inertia mass of quantized vortices in superfluid helium-4
  • 批准号:
    23340108
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
  • 资助金额:
    $12.65万
  • 财政年份:
    2011
  • 负责人:
    YANO Hideo
  • 依托单位:
Generation of Quantized Vortices in Alternating Flows of Superfluid Helium 4
  • 批准号:
    17540335
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
  • 资助金额:
    $2.3万
  • 财政年份:
    2005
  • 负责人:
    YANO Hideo
  • 依托单位:
Proximity Effect at the Boundary between Super and Normal Fluid Helium 3
  • 批准号:
    14540342
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
  • 资助金额:
    $1.86万
  • 财政年份:
    2002
  • 负责人:
    YANO Hideo
  • 依托单位:
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