Browsing by Author "Beverley E. Bean"

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    Annexins in human breast cancer: Possible predictors of pathological response to neoadjuvant chemotherapy
    (2009-05-01) Suebwong Chuthapisith; Beverley E. Bean; Gerard Cowley; Jennifer M. Eremin; Srila Samphao; Robert Layfield; Ian D. Kerr; Janice Wiseman; Mohamed El-Sheemy; Thiagarajan Sreenivasan; Oleg Eremin; Mahidol University; University of Nottingham; Lincoln County Hospital
    Neoadjuvant chemotherapy is used in women who have large or locally advanced breast cancers. However, up to 70% of women who receive neoadjuvant chemotherapy fail to achieve a complete pathological response in their primary tumour (a surrogate marker of long-term survival). Five proteins, previously identified to be linked with chemoresistance in our in vitro experiments, were identified histochemically in pre-treatment core needle biopsies from 40 women with large or locally advanced breast cancers. Immunohistochemical staining with the five proteins showed no single protein to be a predictor of response to chemotherapy. However, pre-treatment breast cancer specimens that were annexin-A2 positive but annexin-A1 negative correlated with a poor pathological response (p = 0.04, Fisher's exact test). The mechanisms by which annexins confer chemoresistance have not been identified, but may be due to inhibition of apoptosis. Annexin-A1 has been shown to enhance apoptosis, whilst annexin-A2, by contrast, inhibits apoptosis. © 2008 Elsevier Ltd. All rights reserved.