Shibayagi 胰高血糖素样肽-1(GLP-1)(活性) ELISA试剂盒
Lbis GLP-1(active) ELISA KIT
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Lbis GLP-1(active) ELISA KIT
Shibayagi 胰高血糖素样肽-1(GLP-1)(活性) ELISA试剂盒
胰高血糖素样肽-1(Glucagon-like peptide-1,GLP-1)是胰高血糖素前驱体的一部分。胰高血糖素前驱体于胰脏、小肠下部以及下丘脑中表达。该前驱体的构造中含有与糖代谢有关的各种各样的生理活性物质(胰高血糖素,肠高血糖素,胃泌酸调节素,GLP-1,GLP-2)的氨基酸序列。根据表达部位加工酶的特异性,胰脏主要分泌胰高血糖素,而小肠下部主要分泌肠高血糖素和胃泌酸调节素。GLP-1和GLP-2则存在于胰高血糖素前驱体后半的结构中。GLP-1由37个氨基酸组成,有2种生物活性形式,分别为GLP-1(7-37)和GLP-1 (7-36)酰胺。两者都存在于小肠下部、胰脏和下丘脑中,GLP-1(7-36)酰胺在下丘脑中占免疫反应GLP-1(IR-GLP-1)总量的55-94%,在小肠中占27-73%。但在胰脏中只有极少量存在。大部分哺乳类(如人类、大鼠、小鼠、牛、猪、狗等)的GLP-1结构相似。
GLP-1: hdeferhaegtftsdvssylegqaakefiawlvkgrg
GLP 1(7-37): haegtftsdvssylegqaakefiawlvkgrg
GLP 1(7-36) amide: haegtftsdvssylegqaakefiawlvkgr-NH2
GLP-1与小肠上部分泌的GIP统称为肠促胰素。该类激素是葡萄糖浓度依赖性方式促进胰岛素分泌。同时具有抑制胃肠道蠕动和胃液分泌、抑制胰高血糖素的释放、促进生长抑素的分泌、使食欲减退,促进肠上皮细胞生长、以及外周组织促进非胰岛素依赖性的葡萄糖的消耗,并促进细胞的生长的作用。有报告指出该类激素与垂体激素的分泌也有关系。
GLP-1(7-36)酰胺在生物体内代谢迅速,DPP-IV (dipeptidyl peptidase IV )会使其失去N-末端的两个氨基酸变为GLP-1(9-36)酰胺,GLP-1(7-37)变为GLP-1(9-37)后会失去活性。有报告指出,体外实验中,在犬的血浆中GLP-1(7-36)酰胺的半衰期是为61±9分,GLP-1(7-37)为132±16分。因此GLP-1的测定,取样的时候有必要使用DPP-IV抑制剂。
此外,肠促胰素中的GIP则是最有力促进GLP-1分泌的激素。回肠中GLP-1的分泌不是食物直接刺激肠道而产生的,而是由于胆碱能和肽类的刺激所产生的。
◆特点
● 短时间测定(完全反应时间:5小时)
● 微量样品(标准操作用量:10 μl)可测
● 使用对环境无害的防腐剂
● 全部试剂均为液体,可直接使用
● 精密的测定精度和高再现性
◆构成
组成 |
状态 |
容量 |
(A) 抗体固相化 96 孔板 |
洗净后使用 |
96 wells(8×12)/1 块 |
(B) GLP-1标准溶液(500 pg/mL) |
稀释后使用 |
200 μL/1 瓶 |
(C) 缓冲液 |
即用 |
60 mL/1 瓶 |
(D)生物素结合抗GLP-1抗体 |
稀释后使用 |
100 μL/1 瓶 |
(E) 过氧化物・抗生物素蛋白结合物 |
稀释后使用 |
100 μL/1 瓶 |
(F) 显色液(TMB) |
即用 |
12 mL/1 瓶 |
(H) 反应终止液(1M H2SO4)※小心轻放 |
即用 |
12 mL/1 瓶 |
( I ) 浓缩洗净液(10×) |
稀释后使用 |
100 mL/1 瓶 |
封板膜 |
4 张 |
|
使用说明书 |
1 份 |
◆交叉反应
※交差率是1,000 pg/mL浓度时的数据
动物类型 |
对象物质 |
反应性和反应率(%) |
Mouse/Rat |
GLP-1(7-36)amide |
100 |
GLP-1(7-37) |
< 0.1 |
|
GLP-1(1-37) |
― |
|
GLP-1(9-36)amide |
― |
|
GLP-2 |
― |
|
Glucagon(1-29) |
― |
|
Insulin |
― |
|
Secretin |
― |
|
GIP |
― |
|
VIP |
― |
|
GRF |
― |
|
Bovine |
Glucagon(1-29) |
― |
VIP |
― |
|
Porcine |
Glucagon(1-29) |
― |
VIP |
― |
―:不存在交叉反应
◆样品信息
小鼠和大鼠的血清及血浆
10 μL/well(标准操作方法)
※测量中由于酶(DPP-IV等)的影响,采血时请注意防止GLP-1(7-36)酰胺的分解,再使用。
◆测定范围
1.56~50.0 pg/mL 【0.47~15.16 pmol/L(分子量3298)】(标准曲线范围)
7.8~250 pg/mL(样品量10 μ)
3.9~125 pg/mL(样品量20 μ)
◆Validation data
精度测试(检测内变异系数)
样品 |
A |
B |
1 |
23.7 |
6.44 |
2 |
23.2 |
5.97 |
3 |
23.4 |
6.39 |
4 |
24.0 |
5.87 |
5 |
24.1 |
6.44 |
mean |
23.7 |
6.22 |
SD |
0.35 |
0.28 |
CV(%) |
1.5 |
4.5 |
单位:pg/mL
再现性测试(检测内变异系数)
测量日/样品 |
E |
F |
第0天 |
25.1 |
6.31 |
第1天 |
25.1 |
6.16 |
第2天 |
25.0 |
6.24 |
第3天 |
25.0 |
6.37 |
mean |
25.0 |
6.27 |
SD |
0.03 |
0.09 |
CV(%) |
0.13 |
1.4 |
单位:pg/mL n=4
添加回收测试
样品C
添加量 |
实测值 |
回收量 |
回收率(%) |
0.00 |
3.93 |
– |
– |
3.26 |
7.28 |
3.35 |
103 |
6.51 |
10.3 |
6.37 |
97.8 |
8.14 |
12.1 |
8.17 |
100 |
样品D
添加量 |
实测值 |
回收量 |
回收率(%) |
0.00 |
11.8 |
– |
– |
7.16 |
19.1 |
7.30 |
102 |
14.3 |
25.5 |
13.7 |
95.8 |
21.5 |
32.4 |
20.6 |
95.8 |
稀释直线性测试
用稀释缓冲液分三次连续稀释2个血清样品的结果,直线回归方程的R2在0.997~0.9999之间。
相关资料
ELISA试剂盒选择指南①② |
ELISA试剂盒选择指③④ |
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产品编号 | 产品名称 | 产品规格 | 产品等级 | 产品价格 |
637-15129 | (AKMGP-011) Lbis® GLP-1(Active) ELISA Kit Lbis® 胰高血糖素样肽-1(GLP-1)(活性) ELISA试剂盒 |
96 tests | – | – |