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  • Title: HLA-DR2 phenotype and plasma lysozyme, beta-glucuronidase and acid phosphatase levels in pulmonary tuberculosis.
    Author: Selvaraj P, Kannapiran M, Reetha AM, Uma H, Xavier T, Narayanan PR.
    Journal: Int J Tuberc Lung Dis; 1997 Jun; 1(3):265-9. PubMed ID: 9432375.
    Abstract:
    SETTING: Tuberculosis Research Centre, Indian Council of Medical Research, Madras, India. OBJECTIVE: To elucidate the role of HLA-Class II genes/gene products on phagocyte enzymes such as lysozyme, beta-glucuronidase and acid phosphatase in the plasma of pulmonary tuberculosis patients. DESIGN: Serological determination of HLA-DR and -DQ antigens was carried out in 54 active and 84 inactive pulmonary tuberculosis (quiescent) patients and 36 healthy control subjects. The levels of lysozyme, beta-glucuronidase and acid phosphatase were measured in the plasma of tuberculosis patients and control subjects. RESULTS: Increased lysozyme levels were observed in active pulmonary tuberculosis patients. beta-glucuronidase activity was higher in inactive-TB than in active-TB patients and control subjects. HLA-DR2 positive patients showed a lower lysozyme level than -DR2 negative patients. CONCLUSION: Increase in the plasma lysozyme level in active TB reveals the active stage of the disease. Further, increase in the activity of beta-glucuronidase in inactive-TB patients reveals the quiescent stage of the disease. The low level of lysozyme in HLA-DR2 positive patients may also be one of the possible factors involved in susceptibility to tuberculosis.
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