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嗜铬粒素A单克隆抗体
包装与价格:
产品名称 CHGA Mouse mAb 产品介绍
嗜铬粒素A单克隆抗体 商品属性
中文名称嗜铬粒素A单克隆抗体 别 名Chromogranin-A; Chromogranin A; beta Granin; CGA; CHG A; Chromogranin A parathyroid secretory protein 1; Chromogranin A precursor; ChromograninA; Pancreastatin; Parastatin; Parathyroid secretory protein 1; Pituitary secretory protein I; SP I; SP1; SPI; Vasostatin; ER-37; CMGA_HUMAN. 抗体来源Mouse 克隆类型Monoclonal 克 隆 号13H7 交叉反应Human (predicted: Mouse,Rat) 产品应用IHC-P=1:200-400,IHC-F=1:200-400,IF=1:200-400 not yet tested in other applications. optimal dilutions/concentrations should be determined by the end user. 理论分子量48 kDa 检测分子量 细胞定位细胞浆 细胞膜 分泌型蛋白 性 状Liquid 浓 度1mg/ml 免 疫 原KLH conjugated synthetic peptide derived from human CHGA 亚 型IgG1, Kappa 纯化方法affinity purified by Protein A 缓 冲 液PBS, pH7.2, 0.02% Porcolin 300, containing stabilizing protein. 保存条件Shipped at 4℃. Store at -20℃ for one year. Avoid repeated freeze/thaw cycles. 注意事项This product as supplied is intended for research use only, not for use in human, therapeutic or diagnostic applications. PubMedPubMed 产品介绍The protein encoded by this gene is a member of the chromogranin/secretogranin family of neuroendocrine secretory proteins. It is found in secretory vesicles of neurons and endocrine cells. This gene product is a precursor to three biologically active peptides; vasostatin, pancreastatin, and parastatin. These peptides act as autocrine or paracrine negative modulators of the neuroendocrine system. Other peptides, including chromostatin, beta-granin, WE-14 and GE-25, are also derived from the full-length protein. However, biological activities for these molecules have not been shown. [provided by RefSeq, Jul 2008]. 靶点与功能
嗜铬粒素A(Chromogranin A, CgA)是一种酸性可溶性糖蛋白,分子量约49kDa,主要存在于神经内分泌细胞的分泌颗粒中。其核心功能包括: 生理作用:参与神经内分泌颗粒的组装与分泌调节; 临床价值:作为神经内分泌肿瘤(NETs)的**标志物,血清CgA水平与肿瘤负荷、转移风险正相关,正常参考值≤100ng/mL; 诊断意义:通过IHC检测肿瘤组织中CgA的表达,可辅助区分NETs与非神经内分泌肿瘤(如肺癌、胃肠道癌)。 实验操作关键要点
IHC-P病理诊断(石蜡切片): 抗原修复:采用柠檬酸钠缓冲液(pH6.0) 微波修复20分钟(95℃),避免高温破坏CgA抗原表位; 阳性定位:神经内分泌细胞胞质呈棕黄色颗粒状阳性,嗜铬细胞瘤中呈弥漫强阳性,肺类癌中呈灶状分布; 对照设置:必须包含正常肾上腺髓质组织(阳性对照)和肝细胞组织(阴性对照)。 WB验证(肿瘤细胞裂解液): 样本处理:使用含蛋白酶抑制剂(1mM PMSF) 的RIPA裂解液冰上裂解30分钟,12000g离心15分钟取上清; 电泳条件:10% SDS-PAGE凝胶,恒压80V浓缩胶、120V分离胶,转膜选用0.45μm PVDF膜(250mA恒流1.5小时); 抗体孵育:一抗1:1500稀释(5% BSA+TBST),4℃孵育过夜,HRP二抗(山羊抗小鼠/兔)1:5000室温孵育1小时。 公司正在出售的产品
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