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精氨酸对糖尿病的作用观察

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南方医科大学学报(J South Med Univ)
2006;26(10)
精氨酸对糖尿病的作用观察
吕伟明 1, 雷尚通 2, 张 强 3, 张赟建 1, 王深明 1, 石汉平 1 ( 1 中山大学附属第一医院普通外科, 广东 广州 510080; 2 南方医科大学南方医院普通外科, 广东 广州 510515; 3 第二军医大学长征医院急救科, 上海 200003)
Control rat +Arginine
Control rat +Saline
图 4 不同处理组大鼠治疗前后血浆蛋白浓度的比较 Fig.4 Changes of plasma pr otein in diffr ent gr oups(n=10) □Pre-treatment; ■Post-treatment * P<0.05 vs pre-treatment; + P<0.05 vs saline group
精氨酸作为一种条件必需氨基酸, 是近半个世纪 以来氨基酸研究的一个热点。研究发现: 精氨酸具有 多种生物效应, 包括刺激内分泌腺分泌、增强细胞免 疫反应、拮抗分解代谢、改善氮平衡[1], 促进动物及人 类 的 伤 口 愈 合 、改 善 住 院 患 者 的 治 疗 结 果 [ 2-4] 。糖 尿 病 是胰岛素绝对或相对分泌不足引起的代谢紊乱, 临床 主要表现为多饮、多食、消瘦、高糖血症、低蛋白血症, 是临床医学的重大挑战。我们及他人的工作发现, 补 充 外 源 性 精 氨 酸 可 以 显 著 改 善 糖 尿 病 伤 口 愈 合 [5-7], 但是, 精氨酸对糖尿病本身的治疗作用未见报告。本
检测动物血浆蛋白及精氨酸、体质量、血糖、饮水 量、摄食量, 具体方法参见文献[8]。 1.4 统计学处理
所有数据均以均数±标准差表示, 并以 t 检验处 理, P<0.05 为有统计学差异。
Body weight(g)
300
250

200
150
100
50
0 Diabetic rat
+Arginine
摘要: 目的 观察精氨酸对糖尿病的治疗作用。 方法 成年雄性 Lewis 大鼠, 随机分为糖尿病组及正常对照组, 前者以链 脲佐菌素复制糖尿病模型, 后者注射等量溶剂; 7 d 后上述两组大鼠再随机分为精氨酸治疗组及盐水治疗组, 每组 10 只 大鼠; 精氨酸治疗组每天腹腔注射 L- 精氨酸 1 g/kg, 盐水治疗组每天注射等量生理盐水; 10 d 后动物安乐死。观察动物 血浆蛋白、精氨酸及葡萄糖浓度, 动物体质量、摄食量及饮水量。 结果 与正常大鼠比较, 糖尿病大鼠血浆蛋白及精氨酸 减少、体质量下降、血糖升高、摄食量及饮水量增加; 与盐水组比较, 糖尿病大鼠经精氨酸治疗后体质量及血糖无显著变 化, 摄食及饮水量明显减少, 血浆蛋白及精氨酸增加; 除精氨酸水平升高外, 正常大鼠经精氨酸治疗后上述其他参数无 变化。 结论 精氨酸可以有效改善糖尿病之多饮、多食症状, 但对血糖及体质量无影响。 关键词: 糖尿病; 精氨酸; 血浆蛋白; 血糖 中图分类号: R587.2 文献标识码: A 文章编号: 1673-4254( 2006) 10-1434-02
Abstr act: Objective To observe the effect of L-arginine on diabetic rats. Methods Forty adult male Lewis rats were randomized equally into diabetic and normal control groups, and the former rats were treated intraperitoneally with streptozotocin to induce diabetes mellitus. Seven days later, half of the diabetic and normal rats were injected intraperitoneally with L-arginine at the daily dose of 1 g/kg, while the remainder were given saline instead. All the rats were euthanized on 10 days after L-arginine or saline treatment, and their body weight, plasma protein, arginine and sugar, food and water intake were analyzed. Results Diabetic rats had obviously decreased body weight, plasma protein and arginine but increased blood sugar and food and water intakes in comparison with the control rats. L-arginine significantly increased plasma protein and arginine, decreased food and water intakes, but failed to prevent weight loss and blood sugar increment in diabetic rats as compared to their saline-treated counterparts. L-arginine supplementation did not result in any changes other than arginine elevation in the control rats. Conclusion L-arginine supplementation can partially improve polydipsia and polyphagia and increase plasma protein in diabetic rats. Key wor ds: diabetes mellitus; arginine; plasma protein; blood sugar
Blood glucose(mmol/L)
30
25
20
Pre-study
15
Post-study
10


Diabetic rat +Arginine
Diabetic rat +Saline
Control rat +Arginine
Control rat +Saline
图 2 不同处理组大鼠治疗前后血糖的比较
Effect of L-ar ginine on diabetic r ats
L! Wei-ming1, LEI Shang-tong2, ZHANG Qiang3, ZHANG Yun-jian1, WANG Shen-ming1, SHI Han-ping1 1Department of General Surgery, First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, China; 2Department of General Surgery, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China; 3Department of Emergency, Changzheng Hospital, Second Military Medical University, Shanghai 200003, China
收稿日期: 2006-06-28 基金项目: 美国 NIH 资助课题( GM54566) Supported by National Institute of Health of the USA (GM54566) 作者简介: 吕伟明( 1963-) , 副教授, E-mail:dychen@yahoo.com 通讯作者: 石汉平( 1962-) , 男, 教授, E-mail:shihp38@hotmail.com
Plasma aginine(μmol/L)
140
120
100
*+
80
60
40
20

Diabetic rat
+Arginine
Diabetic rat +Saline
*+
Control rat +Arginine
Control rat +Saline
图 5 不同处理组大鼠治疗前后血浆精氨水平的比较 Fig.4 Changes of plasma ar ginine in differ ent gr oups(n=10) □Pre-treatment; ■Post-treatment * P<0.05 vs pre-treatment ; + P<0.05 vs saline group
□Pre-treatment; ■Post-treatment * P<0.05 vs pre-treatment ; + P<0.05 vs saline group
Plasma protein(g/L)
60
50

40
30
20
10

Diabetic rat +Arginine

Diabetic rat +Saline
Water intake(ml/d)
180
150 *+
120
90
60
30
0 Diabetic rat Diabetic rat Control rat Control rat +Arginine +Saline +Arginine +Saline
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