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  • Title: Identification of amastigote-specific antigens of Leishmania donovani using kala-azar patient sera.
    Author: Gupta N, Goyal N, Bhatia N, Kamboj KK, Rastogi AK.
    Journal: Indian J Exp Biol; 2001 Jul; 39(7):623-8. PubMed ID: 12019753.
    Abstract:
    Antigenic characterization of the soluble fraction of axenic amastigotes of Leishmania donovani ( strain Dd8, causative agent of Indian kala-azar) and their comparison with promastigotes is reported. The axenic amastigotes were assessed for their immunological status employing anti-A2 monoclonal antibody which is extremely specific for L. donovani amastigotes. SDS-PAGE of 35[S] methionine labeled proteins of the two parasite stages exhibited few stage specific and some conserved antigens in both the stages. An increased synthesis of heat shock proteins was observed in axenic amastigotes. Western blot experiments employing sera of kala azar positive patients identified immunodominent antigens of 116,83,26 and 12 kDa in axenic amastigotes which were not present in promastigotes. These amastigote stage specific antigens may have immense potential in immunodiagnosis and prophylaxis of kala-azar.
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