Browsing by Author "Anjita Pandey"

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Epigenetic silencing of BRCA1 gene associated with demographic and pathologic factors in sporadic breast cancer: A study of an Indian population
(2011) Alok Kumar Singh; Anjita Pandey; Mallika Tewari; Hari Shankar Shukla; Hausila Prasad Pandey
Breast cancer (BC) is a leading cause of cancer-related deaths among women worldwide, and this study further demonstrates that the women of Varanasi (north India) are not untouched by this fatal disease. During BC development, epigenetic activity plays a key role in silencing gene expression. Its widespread occurrence in the cancer genome could inactivate many cellular pathways including DNA repair, cell cycle control, apoptosis, cell adherence, and detoxification. In this study, our aim was to determine the penetrance of BRCA1 promoter methylation and its correlation with pathological and demographic factors in sporadic BC in an Indian population. Our analysis included 127 patients who were diagnosed with sporadic BC. Methylation-specific PCR for the BRCA1 promoter was used during the study and correlated with pathological and demographic factors. Methylation of the BRCA1 promoter was detected in 8.7% (11/127) of the tumors. Correlation of promoter methylation with demographic factors and clinicopathological markers revealed the following data: (i) BRCA1 methylation was more frequently observed in tumor samples taken from premenopausal or perimenopausal women (P=0.026), (ii) methylation of the BRCA1 promoter negatively correlated with estrogen receptor (P=0.040), progesterone receptor (P=0.013), and epidermal growth factor receptor-2 (P=0.002), (iii) the overall promoter methylation was higher in more advanced stages (P=0.036) of the disease. This study has immense implications for understanding epigenetic mechanisms in BC development. The result suggests that the epigenetic silencing of BRCA1 is uncommon and is associated with the triple-negative phenotype. © 2011 Wolters Kluwer Health | Lippincott Williams &Wilkins.
Genomic profiling of breast cancer
(2009) Anjita Pandey; Alok Kumar Singh; Sanjeev Kumar Maurya; Rajani Rai; Mallika Tewari; Mohan Kumar; Hari S. Shukla
Genome study provides significant changes in the advancement of molecular diagnosis and treatment in Breast cancer. Several recent critical advances and high-throughput techniques identified the genomic trouble and dramatically accelerated the pace of research in preventing and curing this malignancy. Tumor-suppressor genes, Proto-oncogenes, DNA-repair genes, Carcinogen-metabolism genes are critically involved in progression of breast cancer. We reviewed imperative finding in breast genetics, ongoing work to segregate further susceptible genes, and preliminary studies on molecular profiling. © 2009 Wiley-Liss, Inc.
Obesity augmented breast cancer risk: A potential risk factor for Indian women
(2011) Alok K. Singh; Anjita Pandey; Mallika Tewari; Daliparthy D. Pratyush; Hemant K. Singh; Hausila P. Pandey; Hari S. Shukla
Background: Obesity is caused by disturbances of energy balance, which is homeostasized by the physiological processes. The study aims to determine the possible impact of rising prevalence of obesity and its effect in the development of breast carcinoma (BC) in Indian population. Methods: This study is carried out on patients (N = 358) who were diagnosed with BC and breast diseases (BD) by calculating their BMI admitted during the period of 2005 to 2009. NIH criteria were used to categorize the patients. Pathological factors of BC patient were then compared among groups. Result: These results were indicative of significant positive association between BC risks with peri/post menopausal status, residence, diet nature, and tobacco uses. Metastases were identified more commonly with increasing weight. It was found to be independently associated with obesity I (OR = 3.103, 95% CI = 1.633-5.895) and obesity II (OR = 6.803, 95% CI = 2.415-19.162). Disease stage and cancer related mortality were significantly associated with increased BMI. Conclusion: The higher prevalence of severe obesity among Indian population was associated with BC. The only alteration apart from early diagnosis is opting for a more natural lifestyle that will affect energy equilibrium and prove to be a viable option for prevention in carcinoma of breast for better survival. © 2011 Wiley-Liss, Inc.