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Title: Immunoglobulin values in healthy Thai children aged ≤ 24 months determined by nephelometry
Authors: Raweerat Sitcharungsi
Torsak Bunupuradah
Arree Pornvoranunt
Tanakorn Apornpong
Jintanat Ananworanich
Kalayanee Khupulsup
Phonethipsavanh Nouanthong
Soamarat Vilaiyuk
Chayapa Phasomsap
Wasu Kamchaisatian
Chitsanu Pancharoen
Thanyawee Puthanakit
Chukiat Sirivichayakul
Suwat Benjaponpitak
Mahidol University
The HIV Netherlands Australia Thailand Research Collaboration
Chulalongkorn University
Keywords: Immunology and Microbiology;Medicine
Issue Date: 1-Jan-2013
Citation: Asian Pacific Journal of Allergy and Immunology. Vol.31, No.4 (2013), 307-313
Abstract: Background: Variation of normal immunoglobulin (Ig) levels between different genetic and environment factors has been studied. Although antibody deficiency diseases can start from infancy, data of Ig reference levels in children aged ≤24 months are still limited, especially in Asian children. Purpose: The aim of this study was to determine serum IgG, IgA, IgM, and IgG subclasses in healthy Thai children from the newborn period to age 24 months. Methods: Serum samples were collected from healthy Thai children age <1-24 months to measured serum IgG, IgA, IgM, and IgG subclasses by nephelometry. Results: Of the 100 infants, 44% were female with a median (range) age of 13 (0.3-24) months. The geometric mean IgG was 803 mg/dL, IgA 36 mg/dL, and IgM 102 mg/dL. The mean IgG1 was 646 mg/dL, IgG2 127 mg/dL, IgG3 45 mg/dL, and IgG4 17 mg/dL. The average ratios of IgG subclass 1:2:3:4 were 77:15:6:2%. No significant differences in each immunoglobulin isotype between genders were found. Our mean IgG level was slightly lower than that in healthy Thai children, measured by radial diffusion method but not significant except 1-3 months (p = 0.016). However, the mean IgG level in our study was higher than that reported by radial diffusion in healthy US children (p <0.001). Conclusions: This study illustrated the importance of having normal Ig values from ageand ethnically-matched controls by high precision nephelometric assay in order to appropriately diagnose immunologic disorders in Asian infants.
ISSN: 22288694
Appears in Collections:Scopus 2011-2015

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