Characteristics of lymphocyte subsets in HIV-infected, long-term nonprogressor, and healthy Asian children through 12 years of age

• Main Authors: Ananworanich J., Apornpong T., Kosalaraksa P., Jaimulwong T., Hansudewechakul R., Pancharoen C., Bunupuradah T., Chandara M., Puthanakit T., Ngampiyasakul C., Wongsawat J., Kanjanavanit S., Luesomboon W., Klangsinsirikul P., Ngo-Giang-Huong N., Kerr S.J., Ubolyam S., Mengthaisong T., Gelman R.S., Pattanapanyasat K., Saphonn V., Ruxrungtham K., Shearer W.T.
• Format: Article
• Language: English
• Published: 2014
• Online Access: http://www.scopus.com/inward/record.url?eid=2-s2.0-78649846344&partnerID=40&md5=c6c9d52ac6a446e224d484508dbf451e; http://cmuir.cmu.ac.th/handle/6653943832/846
• Institution: Chiang Mai University

Background: There are limited data on the immune profiles of HIV-positive children compared with healthy controls, and no such data for Asian children. Objectives: To immunophenotype HIV-positive Asian children, including long-term nonprogressors (LTNPs), compared with age-matched healthy controls. Methods: We used flow cytometry to analyze 13 lymphocyte and monocyte subsets from 222 untreated, HIV-positive children with 15% to 24% CD4+ T cells and no AIDS-related illnesses and 142 healthy children (controls). Data were compared among age categories. Profiles from LTNPs (n = 50), defined as children ≥8 years old with CD4+ T-cell counts ≥350 cells/mm3, were compared with data from age-matched non-LTNPs (n = 17) and controls (n = 53). Results: Compared with controls, HIV-positive children had lower values (cell count per mm3 and percent distribution) for TH cells and higher values for cytotoxic T cells, with reductions in populations of naive TH and cytotoxic T cells, B cells, and natural killer (NK) cells. HIV-positive children had high values for activated TH and cytotoxic T cells. Compared with non-LTNPs, LTNPs had higher values of TH and cytotoxic T cells, naive and memory T-cell subsets, and B and NK cells. Surprisingly, counts of activated TH and cytotoxic T cells were also higher among LTNPs. LNTPs were more frequently male. Conclusion: Untreated, HIV-infected Asian children have immune profiles that differ from those of controls, characterized by low values for TH cells, naive T cells, B cells, and NK cells but high values for cytotoxic, activated TH, and cytotoxic T cells. The higher values for activated T cells observed in LTNPs require confirmation in longitudinal studies. © 2010 American Academy of Allergy, Asthma & Immunology.