title: GST-pi expression in BCR-ABL+ and BCR-ABL- cells from CML patients.
abstract: Our laboratory has been involved in the study of glutathione-sulfhydryl-transferase-pi (GST-pi) for several years. We have recently observed that during haematopoiesis in BMSC liquid cultures from CML patients who were candidates for transplant GST-pi was expressed in presumably malignant cells during different stages of cellular maturation. To confirm this finding, in the present work we are detecting GST-pi expression by immunofluorescence in BCR-ABL+ and BCR-ABL- cells done by FISH of PB from 30 CML patients during different clinical status: treatment (T), hematological relapse (R), blastic crisis (BC) or post-allotrasplant (PT). As well as in PB from 30 Blood-Bank donors. The results were %BCR-ABL+ GST-pi+ cells: T = 1-67, R = 33-69, BC = 90-100 and PT = 1-2; %BCR-ABL- GST-pi+ cells: T = 2-31, R = 5-18, BC = 0-10 and PT = 2-5; %BCR-ABL- GST-pi- cells: T = 2-97, R = 13-62, BC = 0 and PT = 93-96; %BCR-ABL+ GST-pi- cells: T = 0, R = 0, BC = 0 and PT = 0. GST-pi was not expressed in donor cells. The results obtained confirm our previous observations and suggest that GST-pi expression might be used for the evaluation of the minimal residual disease in CML patients.
authors.affiliation: almarche@df1.telmex.net.mx
authors.forename: A
authors.initials: A
authors.lastname: Marché-Cova
authors.forename: M T
authors.initials: MT
authors.lastname: Salles-Manuel
authors.forename: M M
authors.initials: MM
authors.lastname: Santamaría-Torres
authors.forename: A A
authors.initials: AA
authors.lastname: Fernández-Ortiz
authors.forename: P
authors.initials: P
authors.lastname: Sobrevilla-Calvo
authors.forename: R
authors.initials: R
authors.lastname: Rivas-González
authors.forename: R
authors.initials: R
authors.lastname: Méndez-Martínez
authors.forename: E
authors.initials: E
authors.lastname: Velazco-Escobar
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002478:Cells, Cultured; D005260:Female; D016044:Fusion Proteins, bcr-abl / Q000096:biosynthesis* / Q000235:genetics*; D015973:Gene Expression Regulation, Leukemic; D051549:Glutathione S-Transferase pi; D005982:Glutathione Transferase / Q000096:biosynthesis* / Q000235:genetics*; D006801:Humans; D007527:Isoenzymes / Q000096:biosynthesis* / Q000235:genetics*; D015464:Leukemia, Myelogenous, Chronic, BCR-ABL Positive / Q000235:genetics* / Q000473:pathology*; D008297:Male; D008875:Middle Aged
chemical_list: D007527:Isoenzymes; C496556:GSTP1 protein, human; D051549:Glutathione S-Transferase pi; D005982:Glutathione Transferase; D016044:Fusion Proteins, bcr-abl