Journal of Cancer Research and Treatment
ISSN (Print): 2374-1996 ISSN (Online): 2374-2003 Website: https://www.sciepub.com/journal/jcrt Editor-in-chief: Jean Rommelaere
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Journal of Cancer Research and Treatment. 2013, 1(2), 24-30
DOI: 10.12691/jcrt-1-2-1
Open AccessArticle

Clinical and Molecular Significance of Poly (ADP-Ribose) Polymerase-1 (PARP-1) in Breast Cancer of African Women and its Potential as a Targeted Therapy

Ayodeji O.J Agboola1, 2, , Adekunbiola A. F Banjo2, Charles C Anunobi2, Babatunde A Ayoade3, Mopelola A Deji Agboola4, Adewale. A Musa3, Christopher C Nolan1, Emad A. Rakha1, Andrew R. Green1 and Ian O. Ellis1

1Division of Pathology, School of Molecular Medical Sciences, Nottingham University Hospitals and University of Nottingham, Nottingham, United Kingdom

2Department of Morbid Anatomy and Histopathology, Olabisi Onabanjo University and Olabisi Onabanjo University Teaching Hospital, Sagamu, Nigeria

3Department of Surgery, Olabisi Onabanjo University and Olabisi Onabanjo University Teaching Hospital, Sagamu, Nigeria

4Department of Medical Microbiology parasitology, Olabisi Onabanjo University, Sagamu, Nigeria

Pub. Date: August 21, 2013

Cite this paper:
Ayodeji O.J Agboola, Adekunbiola A. F Banjo, Charles C Anunobi, Babatunde A Ayoade, Mopelola A Deji Agboola, Adewale. A Musa, Christopher C Nolan, Emad A. Rakha, Andrew R. Green and Ian O. Ellis. Clinical and Molecular Significance of Poly (ADP-Ribose) Polymerase-1 (PARP-1) in Breast Cancer of African Women and its Potential as a Targeted Therapy. Journal of Cancer Research and Treatment. 2013; 1(2):24-30. doi: 10.12691/jcrt-1-2-1

Abstract

Background: The therapeutic effects of Poly (ADP-ribose) polymerase-1 (PARP -1) inhibition are currently studied in a clinical trial that is recruiting African- American (A-A) women with breast cancer (BC). Although, A-A and West African women are likely to share the same ancestry, there are overwhelming evidences, that BC is undoubtedly heterogeneous which might influence results obtained in these Nationalities. Thus, this study aims to investigate PARP-1 expression in a large and annotated series of breast cancer from Nigerian women to determine its clinical and biological significance for the indigenous African women. Methods: PARP-1 protein expression was assessed immunohistochemically in 204 formalin fixed paraffin samples from Nigerian breast cancer women prepared as TMA. Results: PARP-1 was inversely associated with steroid hormone receptors (oestrogen (ER) and progesterone (PR) receptor), the Homologous Recombination marker BRCA1 associated ring domain 1 (BARD1) and p27. Conversely, a positive association was established between PARP-1 and high histologic grade, expression of basal markers (cytokeratins (CK) 5/6 and 14) and epidermal growth factor receptor (EGFR)), DNA damage-repair markers (protein inhibitor of activator signal transducer gamma (PIAS)), the BRCA1 inhibitor (metastasis tumour antigen-1 (MTA1), p53, the proliferation markers (KI-67, Phosphoinositide-3-kinases (PI3KCA)), the triple-negative and basal-like phenotypes. Outcome analysis indicated PARP-1 as a predictor of poor survival independent of tumour size, histological grade and lymph node involvement. Conclusion: These results provide evidence that PARP-1 plays an important role in Nigerian women with breast cancer. It is recommended that indigenous Black women from Africa are included in the ongoing clinical trial of PARP1 inhibitors that is aimed at determining the efficiency of the drug in black BC women outside United States.

Keywords:
PARP-1 African women therapeutics potential breast cancer

Creative CommonsThis work is licensed under a Creative Commons Attribution 4.0 International License. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

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