Diagnosis kit and chip for bladder cancer using bladder cancer specific methylation marker gene
The present invention relates to a kit and nucleic acid chip for diagnosing bladder cancer using a bladder cancer-specific marker gene. More particularly, the invention relates to a kit and nucleic acid chip for diagnosing bladder cancer, which can detect the promoter methylation of a bladder cancer-specific gene, the promoter or exon region of which is methylated specifically in transformed cells of bladder cancer. The use of the diagnostic kit or nucleic acid chip of the invention enables diagnosis of bladder cancer at an early stage of transformation, thus enabling early diagnosis of bladder cancer, and can diagnose bladder cancer in a more accurate and rapid manner compared to a conventional method.
1. A method for detecting CpG methylation of PENK—proenkephalin gene for bladder carcinoma or bladder cell proliferative disorder diagnosis in a human subject, the method comprising determining hypermethylation of the CpG of the PENK gene in genomic DNA isolated from a clinical sample by contacting the sample with primer(s) comprising a DNA sequence of SEQ ID NO: 13 or 14 to amplify a methylated CpG of the PENK gene, wherein a bladder carcinoma or bladder cell proliferative disorder is detected in the human subject based on increased CpG methylation of the PENK gene relative to that of a control.
2. The method according to claim 1 , wherein the determination of methylation of the CpG of the PENK gene is performed by one selected from the group consisting of PCR, methylation specific PCR, real-time methylation specific PCR, PCR using a methylated DNA-specific binding protein, quantitative PCR, pyrosequencing, and bisulfite sequencing.
3. The method according to claim 1 , wherein the clinical sample is tissue, cell, blood, urine, serum or plasma from a patient suspected of cancer or a subject to be diagnosed.
4. The method according to claim 1 , wherein the determination of methylation of the CpG of the SIM2 gene is comprises examining a CpG methylation of a promoter region of PENK in the clinical sample.
5. The method according to claim 4 , wherein the promoter comprises a DNA sequence represented in SEQ ID NO: 37.
6. The method according to claim 1 , wherein the method further comprises the step of examining CpG methylation of a gene selected from the group consisting of TBX5—T-box 5; CDX2—caudal type homeobox transcription factor 2; CYP1B1—cytochrome P450, family 1, subfamily B, polypeptide 1; VSX1—visual system homeobox 1 homolog, CHX10-like (zebrafish); HOXA11—homeobox A11; T-T, brachyury homolog (mouse); PAQR9—progestin and adipoQ receptor family member IV; and LHX2—LIM Homeobox 2.
7. The method according to claim 6 , wherein the step of examining comprises examining CpG methylation of a promoter or exon region of the gene selected from the group consisting of TBX5; CDX2; CYP1B1; VSX1; HOXA11; T; PAQR9; and LHX2.