title: Absence of p21(CIP 1), p27(KIP 1) and p 57(KIP 2) methylation in MDS and AML.
abstract: Transcriptional silencing of tumour suppressor genes (TSG) due to hypermethylation is a common event in human tumours. The three members of the KIP/CIP family of cyclin dependent kinase inhibitors (CDKIs), p21(CIP 1), p27(KIP 1), and p 57(KIP 2), play key roles in cell cycle regulation, but little is known about their methylation in myeloid neoplasia. Therefore, we analysed 9 haematopoietic cell lines, 67 myelodysplastic syndrome (MDS) and 26 acute myeloid leukaemia (AML) cases as well as 11 controls. p 57(KIP 2) hypermethylation was found in 4/9 cell lines, but methylation of p21(CIP 1) and p27(KIP 1) was infrequent. All patient samples analysed were methylation-negative for these three genes.
authors.affiliation: Institute of Pathology, Medizinische Hochschule Hannover, Carl-Neuberg-Str. 1, D-30625 Hannover, Germany.
authors.forename: Kai
authors.initials: K
authors.lastname: Brakensiek
authors.forename: Florian
authors.initials: F
authors.lastname: Länger
authors.forename: Hans
authors.initials: H
authors.lastname: Kreipe
authors.forename: Ulrich
authors.initials: U
authors.lastname: Lehmann
mesh_terms: D000208:Acute Disease; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002453:Cell Cycle / Q000187:drug effects; D045744:Cell Line, Tumor; D050759:Cyclin-Dependent Kinase Inhibitor p21 / Q000235:genetics*; D050760:Cyclin-Dependent Kinase Inhibitor p27 / Q000235:genetics*; D050761:Cyclin-Dependent Kinase Inhibitor p57 / Q000235:genetics*; D019175:DNA Methylation; D005260:Female; D020868:Gene Silencing; D006801:Humans; D007951:Leukemia, Myeloid / Q000235:genetics*; D008297:Male; D008875:Middle Aged; D009190:Myelodysplastic Syndromes / Q000235:genetics*; D020133:Reverse Transcriptase Polymerase Chain Reaction; D014158:Transcription, Genetic
chemical_list: D050759:Cyclin-Dependent Kinase Inhibitor p21; D050761:Cyclin-Dependent Kinase Inhibitor p57; D050760:Cyclin-Dependent Kinase Inhibitor p27