Survivinis a memberofthe inhibitor ofapoptosis protein (IAP)family. WeInvestigated the antiapoptotic mechanism ofSurvivin, as well as its expressionIn 60 human tumor cell lines used for the National Cancer lontitute's anticancer drag screening program, In cotransfection experhnents, cell deathInduced by Bax or Faa (CD 95) was partially inhibited (mean ±SD,65%±8%)bySurv...

CpG islands are short stretches in DNA sequence whose frequency of cytosine(C)and guanine (G) is higher than background of DNA sequence. They are around the promoter of frequently expressed genes. The conventional way to recognize CpG islands is to use the hidden Markov models (HMMs). While HMMs are known to suffer from not being able to capture long dynamic range information, they usually does...

BACKGROUND CpG islands in hepatitis B virus (HBV) genome are potential targets for methylation mediated gene silencing, and may be involved in the pathogenesis of HBV infection. To date, their characteristics in HBV quasispecies (QS) remain largely unknown. The purpose of this study was to investigate the characteristics of CpG islands in HBV QS. METHODS Forty patients diagnosed as acute hepa...

CpG island methylation has been linked to tumor suppressor gene inactivation in neoplasia and may serve as a useful marker to clone novel cancer-related genes. We have developed a novel PCR-based method, methylated CpG island amplification (MCA), which is useful for both methylation analysis and cloning differentially methylated genes. Using restriction enzymes that have differential sensitivit...

Changes in DNA methylation patterns are an important characteristic of human cancer. Tumors have reduced levels of genomic DNA methylation and contain hypermethylated CpG islands, but the full extent and sequence context of DNA hypomethylation and hypermethylation is unknown. Here, we used methylated CpG island recovery assay-assisted high-resolution genomic tiling and CpG island arrays to anal...

PURPOSE IDH1/2-mutant gliomas harbor a distinct glioma-CpG island methylation phenotype (G-CIMP) that may promote the initiation and progression of secondary pathway gliomas by silencing tumor-suppressive genes. The potential role of tumor-suppressive microRNAs (miRNA; miR) in this process is not understood. EXPERIMENTAL DESIGN To identify potential tumor-suppressive miRNA hypermethylated in ...

The CpG island methylator phenotype (CIMP), characterized by an exceptionally high frequency of methylation of discrete CpG islands, is observed in 18% to 25% of sporadic colorectal cancers (CRCs). Another hypermethylation pattern found in CRCs, termed LRES (long-range epigenetic silencing), is associated with DNA/histone methylation in three distinct gene clusters at chromosome 2q14.2, demonst...

Around 80% of acute myeloid leukemia (AML) patients achieve a complete remission, however many will relapse and ultimately die of their disease. The association between karyotype and prognosis has been studied extensively and identified patient cohorts as having favourable [e.g. t(8; 21), inv (16)/t(16; 16), t(15; 17)], intermediate [e.g. cytogenetically normal (NK-AML)] or adverse risk [e.g. c...

Recent genome- and epigenome-wide studies demonstrate that the DNA methylation is controlled in part by genetics, highlighting the importance of integrating genetic and epigenetic data. To better understand molecular mechanisms affecting gene expression, we used the candidate susceptibility gene paraoxonase 1 (PON1) as a model to assess associations of PON1 genetic polymorphisms with DNA methyl...

We isolated fragments containing parts of CpG islands from human chromosomal regions chosen for expected differences in gene density by segregation of partly melted molecules. Restriction fragments of P1 bacteriophage clones covering a region of 11q13 and those of cosmid clones derived from Xp22 were recovered from bands in denaturing gradient gels that were retained following prolonged exposur...