2011年7月29日 星期五

Near-total glutathione depletion and age-specific cataracts (白內障) induced by buthionine sulfoximine in mice [1986](IR91)



Near-total glutathione depletion and age-specific cataracts (白內障) induced by buthionine sulfoximine in mice [1986](IR91)

http://www.ncbi.nlm.nih.gov/pubmed/3726547

Science 1 August 1986:
Vol. 233 no. 4763 pp. 553-555
DOI: 10.1126/science.3726547

Near-total glutathione depletion and age-specific cataracts (

白內障) induced by buthionine sulfoximine in mice

HI Calvin, C Medvedovsky and BV Worgul

ABSTRACT
The specific inhibitor of glutathione biosynthesis, L-buthionine sulfoximine (L-BSO), although relatively nontoxic in adult mice, induces severe glutathione depletion and age-specific pathological changes when repeatedly administered to male suckling mice. Dense (
濃密的) cataracts (白內障) developed when mice aged 9 to 12 days were given a series of injections of L-BSO, despite excellent survival and the absence of other significant long-term effects. By contrast, similar treatment of mice aged 14 to 17 days, although slightly less effective in reducing glutathione levels, resulted frequently in death, hind-leg paralysis, or impaired spermatogenesis, but did not produce cataracts. Administration of L-BSO to preweanling mice provides a novel model system for the induction of cataracts (白內障) by depletion of lens glutathione and may enable the study of critical functions of glutathione in the lens and other growing tissues during early postnatal (產後的;出生後的) development.


Glutathione Turnover Is Increased during the Acute Phase of Sepsis in Rats [2000](IR91)


Glutathione Turnover Is Increased during the Acute Phase of Sepsis in Rats [2000](IR91)

http://jn.nutrition.org/content/130/5/1239.abstract?sid=a76164c7-3e13-4c4f-bc2c-6592520e8938

(Journal of Nutrition. 2000;130:1239-1246.)
© 2000 The American Society for Nutritional Sciences
Article

Glutathione Turnover Is Increased during the Acute Phase of Sepsis in Rats
1,2

Thierry Malmezat*, Denis Breuillé†, Pierre Capitan*, Philippe Patureau Mirand* and Christiane Obled*3
; * ; Laboratoire d'Etude du Métabolisme Azoté, INRA, Clermont-Ferrand Theix, 63122 Saint Genès Champanelle, France, and; † ; Centre de Recherches Nestlé, Vers chez les blanc, Lausanne 26, Switzerland

Glutathione metabolism during infection has been poorly documented. Glutathione concentrations and synthesis rates were studied in infected rats (2 d after infection) and in pair-fed controls. Glutathione synthesis rates were determined in liver, spleen, lung, small and large intestine, skeletal muscle, heart and blood by a 4-h or 6-h 15N cysteine infusion. The activities of four hepatic enzymes involved in glutathione metabolism were also determined. Glutathione synthesis rates were significantly greater in liver (+465%), spleen (+388%), large intestine (+109%), lung (+100%), muscle (+91%) and heart (+80%) of infected rats compared with pair-fed controls. Glutathione concentrations were also greater in these tissues but were unaffected in small intestine and lower in blood. In keeping with the stimulation of liver glutathione synthesis, the activities of liver γ-glutamyl-cysteine synthetase and glutathione reductase were significantly greater in liver of infected rats than of pair-fed rats. From the present study, we estimate that glutathione synthesis accounts for at least 40% of the enhanced cysteine utilization during infection. This increased utilization may be the primary cause of an enhanced cysteine requirement in infection.

KEY WORDS: • rats • glutathione synthesis rate • cysteine infusion • glutathione-related enzymes


2011年7月16日 星期六

演講的通知_{生老病死的秘密 - 從科學的觀點切入}[2011-07-30-WD6]


演講的通知
_{生老病死的秘密 - 從科學的觀點切入}[2011-07-30-WD6]

演講的題目:
生老病死的秘密 - 從科學的觀點切入

引言人的姓名:
余儀呈 醫師, 台北市芝山診所; 台北榮民總醫院 家庭醫學科 主治醫師

主講人的姓名:
湯偉晉先生, 總經理, 湯生科技

演講當天的日期和時間:
2011-07-30
星期六 下午 02:30

地點:
芝山生活家(芝山診所的舊址)

芝山生活家的電話:
(02) 2836-9493 (
星期一公休)

芝山生活家的地址:
台北市德行東路 203 2

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