SignalSlide? HER3/ErbB3 IHC Controls

• 产品编号：CST-12128S      品牌：Cell Signaling Technology       原厂货号：12128S
• 产品分类：生化和细胞分析 > 其它细胞分析试剂盒 > IHC 和 ICC 试剂盒
• 应用分类：

描述：

Description

Each control slide contains formalin fixed, paraffin-embedded cell pellets, MCF7 (HER3/ErbB3 positive) and MDA-MB-231 (HER3/ErbB3 negative), that serve as a control for HER3/ErbB3 immunostaining.

原厂资料：

Description

Each control slide contains formalin fixed, paraffin-embedded cell pellets, MCF7 (HER3/ErbB3 positive) and MDA-MB-231 (HER3/ErbB3 negative), that serve as a control for HER3/ErbB3 immunostaining.

Applications

These slides are intended for use in immunohistochemical assays.

Background

HER3/ErbB3 is a member of the ErbB receptor protein tyrosine kinase family, but it lacks tyrosine kinase activity. Tyrosine phosphorylation of ErbB3 depends on its association with other ErbB tyrosine kinases. Upon ligand binding, heterodimers form between ErbB3 and other ErbB proteins, and ErbB3 is phosphorylated on tyrosine residues by the activated ErbB kinase (1,2). There are at least 9 potential tyrosine phosphorylation sites in the carboxy-terminal tail of ErbB3. These sites serve as consensus binding sites for signal transducing proteins, including Src family members, Grb2, and the p85 subunit of PI3 kinase, which mediate ErbB downstream signaling (3). Both Tyr1222 and Tyr1289 of ErbB3 reside within a YXXM motif and participate in signaling to PI3K (4).

Investigators have found that ErbB3 is highly expressed in many cancer cells (5) and activation of the ErbB3/PI3K pathway is correlated with malignant phenotypes of adenocarcinomas (6). Research studies have demonstrated that in tumor development, ErbB3 may function as an oncogenic unit together with other ErbB members (e.g. ErbB2 requires ErbB3 to drive breast tumor cell proliferation) (7). Thus, investigators view inhibiting interaction between ErbB3 and ErbB tyrosine kinases as a novel strategy for anti-tumor therapy.

1. Yarden, Y. and Sliwkowski, M.X. (2001) Nature Rev. Mol. Cell. Biol. 2, 127-137.
2. Guy, P.M. et al. (1994) Proc. Natl. Acad. Sci. USA 91, 8132-8136.
3. Songyang, Z. et al. (1993) Cell 72, 767-778.
4. Kim, H.H. et al. (1994) J. Biol. Chem. 269, 24747-55.
5. Sithanandam, G. et al. (2003) Carcinogenesis 24, 1581-1592.
6. Kobayashi, M. et al. (2003) Oncogene 22, 1294-1301.
7. Holbro, T. et al. (2003) Proc. Natl. Acad. Sci. USA 100, 8933-8938.

注意事项：

Storage: Store at 4°C.
Optimal staining is achieved if slides are stained following CST’s
standard IHC protocols and are used within 8 weeks of assay
date; however, signals may persist beyond two months.