High expression of insulin-like growth factor-II (IGF-II) in epithelial ovarian cancer is associated with aggressive disease and poor prognosis. IGF-II transcription is initiated from multiple promoters. Promoter-specific expression is regulated by DNA methylation, which is often dysregulated in cancer. Here, the effects of promoter-specific methylation on IGF-II expression are investigated in ...

myelodysplastic syndromes (mdss) are a clonal bone marrow (bm) disease characterized by ineffective hematopoiesis, dysplastic maturation and progression to acute myeloid leukemia (aml). methylation silencing of hrk has been found in several human malignancies. in this study, we explored the association of hrk methylation status with its expression, clinical parameters and mds subtypes in mds pa...

Background One of the most prevalent aberrant epigenetic modifications found in hepatocellular carcinoma (HCC) is abnormal DNA methylation. Our study aimed to evaluate serum Ras association domain family 1A (RASSF1A) gene promoter methylation patients with chronic viral hepatitis C (HCV)-associated liver cirrhosis and without HCC as a potential new marker for early detection HCC. Methodology Th...

BACKGROUND/AIM To identify promoter methylation as a major silencing mechanism in potential precursor lesions of sporadic diffuse gastric cancer (DGC), we investigated promoter methylation of CDH1 (E-Cadherin gene) in a series of DGCs and matched normal mucosa. MATERIALS AND METHODS The extent of CDH1 gene promoter methylation was explored using methylation-specific polymerase chain reaction ...

BACKGROUND The cyclin-dependent kinase inhibitors p14ARF and p15INK4B are tumor suppressor genes that have been reported to be silenced through promoter methylation in many human cancers. However, the strength of association between p14ARF or p15INK4B promoter methylation and lung cancer remains unclear. Thus, we first determined whether p14ARF and p15INK4B promoter methylation played a key rol...

BACKGROUND Inactivation of tumour-related genes by promoter hypermethylation is a common epigenetic event in the development of a variety of tumours. AIM To investigate in primary uveal melanoma the status of promoter methylation of genes thought to be involved in tumour development: p16, TIMP3, RASSF1, RARB, FHIT, hTERT and APC. METHODS Gene promoter methylation was studied by methylation-...

BACKGROUND The promoter region of the adenomatous polyposis coli (APC) gene is hypermethylated in several types of cancers, including non-small cell lung cancer (NSCLC). The prevalence of methylation in the promoter region of this gene in tumor tissues and autologous controls has not been consistent in previous studies. We evaluated the frequency of APC gene promoter 1A methylation between tumo...

Recent studies have implicated epigenetics in the pathophysiology of diabetes. Furthermore, DNA methylation, which irreversibly deactivates gene transcription, of the insulin promoter, particularly the cAMP response element, is increased in diabetes patients. However, the underlying mechanism remains unclear. We aimed to investigate insulin promoter DNA methylation in an over-nutrition state. I...

Loss of RARβ2 expression by promoter methylation is an early event in oral carcinogenesis. Understanding the mechanisms and consequences RARβ loss may aid understanding disappointing results retinoid chemoprevention trials. This study aimed to describe effects all-trans retinoic acid (ATRA) de-methylating agent 5-Aza-2′ deoxycytidine (5-AZA-CdR) on a panel immortal potentially malignant lesion ...

Klotho (KL) expression is down-regulated in the renal tissues of chronic kidney disease (CKD) animal models and patients with end-stage renal disease. The putative role of KL promoter hypermethylation in the progression of CKD remains unclear. The present study aimed to determine renal and peripheral blood mononuclear cells (PBMC) levels of KL promoter methylation and analyze their relationship...