Ahmed A. Benhasouna

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PURPOSE Triple-negative (TN; estrogen receptor, progesterone receptor, and HER-2 negative) cancer and basal-like breast cancer (BLBC) are associated with poor outcome and lack the benefit of targeted therapy. It is widely perceived that BLBC and TN tumors are synonymous and BLBC can be defined using a TN definition without the need for the expression of(More)
Although the prognostic significance of proliferation in early invasive breast cancer has been recognized for a long time, recent gene-expression profiling studies have reemphasized its biologic and prognostic value and the potential application of its assessment in routine practice, particularly to define prognostic subgroups of luminal/hormone(More)
The Tensin gene family encodes proteins thought to modulate integrin function. C-terminal Tensin-like (CTEN) is a member of the Tensin gene family which lacks the N-terminus actin-binding domain. Cten is reported to have both oncogenic and tumour-suppressor functions. We investigated the role that Cten may play in colorectal cancer (CRC). By quantitative(More)
BACKGROUND Basal-like and triple-negative breast tumours encompass an important clinical subgroup and biomarkers that can prognostically stratify these patients are required. MATERIALS AND METHODS We investigated two breast cancer tissue microarrays for the expression of calpain-1, calpain-2 and calpastatin using immunohistochemistry. The first microarray(More)
BACKGROUND Although virtually all cases of lobular carcinoma in situ lack E-cadherin expression, a proportion of morphologically typical invasive lobular carcinomas (ILCs) retain its expression. The frequency and significance of E-cadherin expression in ILC remain to be elucidated. In this study, we have assessed E-cadherin protein expression in a(More)
Although the role of BRCA1 and the homologous recombination (HR) pathway in breast cancer (BC) has been extensively studied, the alternative repair pathway for DNA double-strand breaks (DSBs), non-homologous end-joining (NHEJ) remains to be defined. Ku proteins bind to DNA DSB ends and play a key role in NHEJ. In this study we aimed to assess the expression(More)
Poly(ADP-ribose) polymerase-1 (PARP1) is a key facilitator of DNA repair. PARP inhibitors have gained recent attention as promising therapeutic agents for the treatment of solid tumours including breast cancer (BC). However, the biological and clinical significance of PARP1 expression in BC and its role in DNA-damage response (DDR) remain to be defined. We(More)
C-terminal tensin-like (CTEN) gene is a member of the TENSIN gene family, involved in cell migration and localised at focal adhesion sites. This study was designed to explore the prevalence and clinical significance of CTEN expression in a large and well-characterised series (n = 1,409) invasive breast cancer (BC) cases with long term follow-up (median 11(More)
A CD44−/CD24+ phenotype is a poor prognostic marker in early invasive breast cancer. Breast cancer cells with high CD44 and low or absent CD24 (i.e. CD44+CD24−/low phenotype) are reported to have stem cell features. However, the clinical impact of CD24 and CD44 expression in tumours remains unclear. To explore the immunohistochemical expression of CD44 and(More)
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