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- W2086156768 abstract "Background Src, a non-receptor tyrosine kinase is elevated in cancer with expression and activity correlated with cell proliferation, adhesion, survival, motility, metastasis and angiogenesis. There is limited data on Src expression and subcellular localization in breast cancer and no information about expression in racial/ethnic groups. Methodology/Principal Findings The present study evaluated Src expression, activity, and subcellular localization in triple negative breast cancer (TNBC) and ERα positive breast cancer (ER+BC), cancer tissue and adjacent normal epithelial ducts, and Caucasian and African American cases. 79 paraffin embedded breast carcinoma cases were obtained from Tulane University Hospital between 2007–2009. 39 cases represented TNBC (33-African Americans, 4-Caucasians, 2-unknowns) and 40 cases represented ER+BC (21-African Americans, 16-Caucasians, 3-unknowns). Immunohistochemistry was used to measure staining distribution and intensity of total Src and activated phospho-SrcY416 (p-Y416Src) in carcinoma tissue and adjacent normal mammary ducts. In TNBC and ER+BC, total Src was significantly higher in cancer compared to adjacent normal ducts (P<0.0001) in both cell membrane and cytoplasm. In membranes, p-Y416Src was elevated in cancer compared to normal ducts. Total Src in the tumor cytoplasm was significantly higher in TNBC compared to ER+BC (P = 0.0028); conversely, p-Y416Src in the tumor cell membranes was higher in TNBC compared to ER+BC (P = 0.0106). Comparison between African American (n = 21) and Caucasian ER+BC (n = 16) revealed no significant difference in expression and localization of total Src and p-Y416Src. TNBC cases positive for lymph node metastasis showed elevated membrane p-Y416Src compared to lymph node negative TNBC (P = 0.027). Conclusion/Significance Total Src and p-Y416Src were expressed higher in cancer compared to adjacent normal ducts. Cytoplasmic total Src and membrane p-Y416Src were significantly higher in TNBC compared to ER+BC. TNBC cases with lymph node metastasis showed elevated membrane p-Y416Src. Taken together, Src was elevated in the membrane and cytoplasm of more aggressive TNBC." @default.
- W2086156768 created "2016-06-24" @default.
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- W2086156768 date "2012-03-22" @default.
- W2086156768 modified "2023-10-06" @default.
- W2086156768 title "Subcellular Localization of Total and Activated Src Kinase in African American and Caucasian Breast Cancer" @default.
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- W2086156768 doi "https://doi.org/10.1371/journal.pone.0033017" @default.
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