title: Expression of multidrug resistance P-glycoprotein on peripheral blood mononuclear cells of patients with granular lymphocyte-proliferative disorders.
abstract: The immunological findings and clinical course of 33 patients with granular lymphocyte-proliferative disorders (GLPD) are presented. Based on the surface phenotypes of peripheral blood granular lymphocytes (GL), the GLPD were divided into two groups, namely CD3+ T cell-lineage GLPD (T-GLPD) and CD3- CD16+ NK cell-lineage GLPD (NK-GLPD). Twenty-one patients had T-GLPD, and 12 had NK-GLPD. One patient with T-GLPD and two patients with NK-GLPD had progressive clinical courses and died of the disease despite receiving combination chemotherapy. Among eleven patients analysed for the expression of multidrug resistance P-glycoprotein, six of eight patients with T-GLPD and all three patients with NK-GLPD clearly expressed P-glycoprotein. Since patients with immature NK-GLPD appear to undergo a progressive clinical course, we suggest that therapeutic trials using P-glycoprotein blockers in addition to chemotherapy might be beneficial for such patients.
authors.affiliation: Department of Biomolecular Science, Faculty of Science, Toho University, Chiba, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Kobayashi
authors.forename: N
authors.initials: N
authors.lastname: Watanabe
authors.forename: K
authors.initials: K
authors.lastname: Oshimi
mesh_terms: D020168:ATP Binding Cassette Transporter, Subfamily B, Member 1 / Q000096:biosynthesis* / Q000235:genetics; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000971:Antineoplastic Combined Chemotherapy Protocols / Q000494:pharmacology / Q000627:therapeutic use; D018432:Drug Resistance, Multiple; D005260:Female; D005786:Gene Expression Regulation; D006801:Humans; D016130:Immunophenotyping; D007694:Killer Cells, Natural / Q000737:chemistry; D007963:Leukocytes, Mononuclear / Q000737:chemistry*; D008232:Lymphoproliferative Disorders / Q000097:blood* / Q000188:drug therapy / Q000473:pathology; D008297:Male; D008875:Middle Aged; D014411:Neoplastic Stem Cells / Q000737:chemistry*; D011379:Prognosis; D013601:T-Lymphocytes / Q000737:chemistry
chemical_list: D020168:ATP Binding Cassette Transporter, Subfamily B, Member 1