title: T-cell receptor gamma and delta gene rearrangements in T-cell acute lymphoblastic leukemia in Indian patients.
abstract: T-cell acute lymphoblastic leukemia (T-ALL) is a clonal lymphoid malignancy and junctional sequences of rearranged T-cell receptor (TCR) represent the best suitable marker to study clonality in these patients. A sensitive, non-radioactive, and rapid approach of PCR coupled with heteroduplex analysis was used to analyse clonality of TCR gamma and delta gene rearrangements in 26 Indian T-ALL patients. Amongst TCR gamma gene family, VgammaI-Jgamma1.3/2.3 sequences were most utilized (53.9%) while from TCRdelta repertoire Vdelta1-Jdelta1 sequences were preferentially rearranged (23.1%) in these patients. 19.2% of Indian T-ALL patients demonstrated both clonal TCR gamma and delta gene rearrangements along with surface expression of TCRgammadelta. Although the majority of T-ALL patients showed surface expression of TCRalphabeta, the small fraction (19.2%) of TCRgammadelta+ T-ALL represent a distinct subgroup which needs further evaluation.
authors.affiliation: Cellular Immunology Unit, Cancer Research Institute, Tata Memorial hospital, Parel, Mumbai, India.
authors.forename: J
authors.initials: J
authors.lastname: Kode
authors.forename: S
authors.initials: S
authors.lastname: Advani
authors.forename: S
authors.initials: S
authors.lastname: Chiplunkar
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D000971:Antineoplastic Combined Chemotherapy Protocols / Q000627:therapeutic use; D002648:Child; D002675:Child, Preschool; D002699:Chlorambucil / Q000627:therapeutic use; D005260:Female; D016694:Gene Rearrangement, delta-Chain T-Cell Antigen Receptor; D015334:Gene Rearrangement, gamma-Chain T-Cell Antigen Receptor; D006801:Humans; D016130:Immunophenotyping; D007194:India; D015459:Leukemia-Lymphoma, Adult T-Cell / Q000188:drug therapy / Q000235:genetics* / Q000276:immunology / Q000401:mortality; D008297:Male; D008875:Middle Aged; D008942:Mitoxantrone / Q000627:therapeutic use; D011239:Prednisolone / Q000627:therapeutic use; D012737:Sex Factors; D013601:T-Lymphocytes / Q000276:immunology*
chemical_list: D002699:Chlorambucil; D011239:Prednisolone; D008942:Mitoxantrone