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  • Title: Id-1 overexpression in invasive ductal carcinoma cells is significantly associated with intratumoral microvessel density in ER-negative/node-positive breast cancer.
    Author: Jang KS, Han HX, Paik SS, Brown PH, Kong G.
    Journal: Cancer Lett; 2006 Dec 08; 244(2):203-10. PubMed ID: 16469432.
    Abstract:
    The aim of this study is to investigate the possible role of inhibitor of DNA binding (Id-1) overexpression in human breast cancer. We examined Id-1 expression by immunohistochemistry in 263 human breast cancers, 15 in situ lesions and 248 invasive cancers to investigate the relationship between its expression and various clinicopathological factors. Id-1 expression was significantly higher in invasive ductal carcinoma than in in situ ductal carcinoma or other invasive cancer subtypes (P=0.029 and 0.006, respectively). We also examined the association between Id-1 expression and tumor angiogenesis by measuring microvessel densities (MVD). Regarding the endothelial cells of microvessels showed negative or very weak Id-1 expression, Id-1 overexpression was found to be significantly related to MVD (P=0.014). Furthermore, Id-1 overexpression was found to be significantly associated with higher MVD in the ER-negative and node-involved subgroups of breast cancer (P=0.040 and 0.046, respectively). These data indicate that Id-1 overexpression is significantly associated with tumor angiogenesis, especially in the ER-negative and node-positive subtypes of invasive breast cancer. Thus, Id-1 presents a possible therapeutic antitumor target molecule in ER-negative and node-positive breast cancer.
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