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Pattern of immunoglobulin (Ig) and T-cell receptor (TCR) gene rearrangements in childhood acute lymphoblastic leukemia in India. 2000

S Sazawal, and K Bhatia, and S Gurbuxani, and L Singh Arya, and V Raina, and A Khattar, and T Vats, and I Magrath, and M Bhargava
Department of Haematology, All India Institute of Medical Sciences, IRCH Building (1st Floor), AIIMS, 110029, New Delhi, India.

In 120 cases of acute lymphoblastic leukemia (median age 8 years), IgH chain gene was rearranged in 99% B-Cell Precursor (BCP) ALLs and 13% T-ALLs. One or the other TCR locus was rearranged not only in all T-ALLs, but also in 87% of BCP-ALLs. TCR-beta rearrangement in BCP-ALL was associated with a higher mean age at presentation (8.7 vs. 6.2 years, P=0.008), lower mean platelet counts (61.2x10(9)/l vs. 103.7x10(9)/l, P=0.003) and a poorer DFS (% cummulative survival 0 vs. 88.9+/-10.5, P=0.004). TCR-gamma rearrangement in T-ALL was associated with a higher mean WBC count (186.3x10(9)/l vs. 63. 4x10(9)/l, P=0.002). Also, the pattern of rearrangement of these genes appeared to be different from the West; viz. TCR-beta rearrangement in a higher proportion of BCP-ALLs (58%, 95% confidence intervals 45-69%), invariable deletion of Cgamma1 and only monoallelic rearrangement for TCR-delta locus. This repertoire of gene rearrangement may have a bearing on the poor treatment outcome reported previously from our geographic region.

UI MeSH Term Description Entries
D007136 Immunoglobulins Multi-subunit proteins which function in IMMUNITY. They are produced by B LYMPHOCYTES from the IMMUNOGLOBULIN GENES. They are comprised of two heavy (IMMUNOGLOBULIN HEAVY CHAINS) and two light chains (IMMUNOGLOBULIN LIGHT CHAINS) with additional ancillary polypeptide chains depending on their isoforms. The variety of isoforms include monomeric or polymeric forms, and transmembrane forms (B-CELL ANTIGEN RECEPTORS) or secreted forms (ANTIBODIES). They are divided by the amino acid sequence of their heavy chains into five classes (IMMUNOGLOBULIN A; IMMUNOGLOBULIN D; IMMUNOGLOBULIN E; IMMUNOGLOBULIN G; IMMUNOGLOBULIN M) and various subclasses. Globulins, Immune,Immune Globulin,Immune Globulins,Immunoglobulin,Globulin, Immune
D007194 India A country in southern Asia, bordering the Arabian Sea and the Bay of Bengal, between Burma and Pakistan. The capitol is New Delhi. Republic of India
D012106 Research Critical and exhaustive investigation or experimentation, having for its aim the discovery of new facts and their correct interpretation, the revision of accepted conclusions, theories, or laws in the light of newly discovered facts, or the practical application of such new or revised conclusions, theories, or laws. (Webster, 3d ed) Research Priorities,Laboratory Research,Research Activities,Research and Development,Activities, Research,Activity, Research,Development and Research,Priorities, Research,Priority, Research,Research Activity,Research Priority,Research, Laboratory
D002648 Child A person 6 to 12 years of age. An individual 2 to 5 years old is CHILD, PRESCHOOL. Children
D002675 Child, Preschool A child between the ages of 2 and 5. Children, Preschool,Preschool Child,Preschool Children
D005838 Genotype The genetic constitution of the individual, comprising the ALLELES present at each GENETIC LOCUS. Genogroup,Genogroups,Genotypes
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000293 Adolescent A person 13 to 18 years of age. Adolescence,Youth,Adolescents,Adolescents, Female,Adolescents, Male,Teenagers,Teens,Adolescent, Female,Adolescent, Male,Female Adolescent,Female Adolescents,Male Adolescent,Male Adolescents,Teen,Teenager,Youths
D015322 Gene Rearrangement, B-Lymphocyte Ordered rearrangement of B-lymphocyte variable gene regions coding for the IMMUNOGLOBULIN CHAINS, thereby contributing to antibody diversity. It occurs during the differentiation of the IMMATURE B-LYMPHOCYTES. B-Cell Gene Rearrangement,B-Lymphocyte Gene Rearrangement,Gene Rearrangement, B-Cell,B Cell Gene Rearrangement,B Lymphocyte Gene Rearrangement,B-Cell Gene Rearrangements,B-Lymphocyte Gene Rearrangements,Gene Rearrangement, B Cell,Gene Rearrangement, B Lymphocyte,Gene Rearrangements, B-Cell,Gene Rearrangements, B-Lymphocyte,Rearrangement, B-Cell Gene,Rearrangement, B-Lymphocyte Gene,Rearrangements, B-Cell Gene,Rearrangements, B-Lymphocyte Gene
D015329 Gene Rearrangement, T-Lymphocyte Ordered rearrangement of T-cell variable gene regions coding for the antigen receptors. Gene Rearrangement, T-Cell Antigen Receptor,T-Cell Gene Rearrangement,T-Lymphocyte Gene Rearrangement,Gene Rearrangement, T-Cell,Gene Rearrangement, T Cell,Gene Rearrangement, T Cell Antigen Receptor,Gene Rearrangement, T Lymphocyte,Gene Rearrangements, T-Cell,Gene Rearrangements, T-Lymphocyte,Rearrangement, T-Cell Gene,Rearrangement, T-Lymphocyte Gene,Rearrangements, T-Cell Gene,Rearrangements, T-Lymphocyte Gene,T Cell Gene Rearrangement,T Lymphocyte Gene Rearrangement,T-Cell Gene Rearrangements,T-Lymphocyte Gene Rearrangements

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