BACKGROUND Topoisomerase I (TOPO1) and topoisomerase IIα (TOP2A) are specific targets of multiple chemotherapy drugs. Increased expression of TOPO1 protein and amplification of the TOP2A gene have been associated with treatment response in colorectal and breast cancers, respectively. TOPO1 and TOP2A may be potential therapeutic targets in other malignancies as well. SUMMARY OF METHODS We anal...

Background Constitutive activation of HER2-dependent intracellular signalling by HER2 gene amplification or by HER2 mutations has been demonstrated as a mechanism of primary and secondary cancer resistance to cetuximab or panitumumab in preclinical and clinical models of metastatic colorectal cancer (mCRC). Both HER2 Amplification for Colorectal Cancer Enhanced Stratification (HERACLES) cohort ...

BACKGROUND Previous studies have shown that human epidermal growth factor receptor 2 (HER2) may play an important role in the invasion and metastasis of pancreatic cancer, but the relationship between HER2 amplification level and prognosis of pancreatic cancer patients is still controversial. Therefore, we performed a meta-analysis to determine the prognostic significance of HER2 amplification ...

1 4 Introduction Human epidermal growth factor receptor 2 (HER2, ErbB2, Neu) is a 185-kDa transmembrane tyrosine kinase receptor. It is a member of the EGFR family and plays a central role in growth factor signal transduction. HER2 overexpression/amplification is implicated in the development of various solid tumours and plays a pivotal role in oncogenic transformation and tumorogenesis.1 The H...

HER2 overexpression and anti-HER2 agents represent probably the best story of success of individualized therapy in breast cancer. Due to the important therapeutic implications, the issue under the spotlight has been, since ever, the correct identification of true HER2 positivity on tissue specimens. Eligibility to anti-HER2 agents is strictly dependent on the demonstration of HER2 overexpressio...

South Asian Journal of Cancer ♦ Volume 6 ♦ Issue 2 ♦ April-June 2017 46 showed 19% breast carcinoma with polysomy 17. When we applied 2013 CAP scoring criteria, we found 14.6% increase in number for HER2 amplification with polysomy 17. As we shown one case in Figure 1, polysomy17 with negative according to CAP 2007 guideline but when we applied 2013 CAP guideline on the same case, the case shou...

Human epidermal growth factor receptor 2 (HER2) and topoisomerase II alpha (TOP2A) genes have been proposed as predictive biomarkers of sensitivity to anthracycline chemotherapy. Recently, chromosome 17 centromere enumeration probe (CEP17) duplication has also been associated with increased responsiveness to anthracyclines. However, reports are conflicting and none of these tumor markers can ye...

OBJECTIVE The Her2/neu status is of great clinical value in breast tumor patients. Fluorescence in situ hybridization (FISH) and immunohistochemistry (IHC) techniques are the test of choice for many practicing pathologies. The main objective of this retrospective study was to investigate the relationship between Her2/neu breast cancer amplification and overexpression (DNA, mRNA and protein). ...

It is well known that the amplification of the HER2 gene is closely associated with poor prognosis of breast cancer. However, there is controversy about the clinical significance of HER2 according to lymph node status in breast cancer. The aim of this study was to identify the differences in the prognostic significance of HER2 gene amplification according to the stages of breast cancer. We prep...

Objective: HEr2/neu is overexpressed/amplified in 20% of breast cancers. HEr2/neu status plays a role in determining the patients who might benefit from hormonal therapy and targeted therapy with Trastuzumab. The main cause of HEr2/neu overexpression is gene amplification. 10-25% of patients show Topoisomerase II-alpha gene alterations with HEr2/neu amplification. The objective of this study wa...