Journal List > Allergy Asthma Respir Dis > v.4(3) > 1059185

Lee, Yoon, Kim, Cho, Lee, Gu, Park, Choi, Shin, Kim, Park, Choi, and Jung: Intravenous immunoglobulin therapy in a selective IgG3 deficient patient with recurrent respiratory infections and asthma attacks

Abstract

The IgG subclass deficiency is defined as a significant decrease in the serum concentrations of one or more subclasses of IgG in a patient whose total IgG concentration is normal. IgG subclass deficiency can predispose to recurrent sinopulmonary infections. A 29-year-old female patient with a 4-year history of bronchial asthma presented with cough, sputum, dyspnea, and recurrent respiratory infections. She had frequently been treated with antibiotics and systemic steroids for recurrent respiratory infections and acute asthma exacerbations. Chest X-ray and computed tomography showed pectus excavatum and bronchial wall thickening without lung parenchymal abnormalities. On immunological evaluation, she was found to have a low serum IgG3, with normal total IgG concentration. Under diagnosis of selective IgG3 deficiency, she was started on monthly infusions of intravenous immunoglobulin (IVIG) therapy. The frequency and severity of respiratory infections and acute asthma exacerbations were markedly decreased during 3 years of IVIG therapy. Our case report suggests that a patient who has underlying selective IgG3 deficiency and asthma may benefit from IVIG therapy as this can significantly reduce the incidence and severity of recurrent respiratory infections and acute asthma exacerbations.

Figures and Tables

Fig. 1

(A) Chest X-ray shows increased opacity in right lower lung field, probably due to pectus excavatum. (B) Paranasal sinus waters view shows no abnormality in paranasal sinuses. (C) High resolution computed tomography of chest reveals crowding of subsegmental bronchi, medial segment of right middle lobe, probably due to pectus excavatum and bronchial wall thickening without lung parenchymal abnormalities.

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Fig. 2

Changes in duration of antibiotics and total dose of systemic steroids per year according to intravenous immunoglobulin (IVIG) treatment.

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Table 1

The change of serum IgG and IgG subclass levels according to intravenous immunoglobulin treatment

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IgG subclass Normal range Initial (Sep, 2012) At 6 months (Apr, 2013) At 12 months (Oct, 2013)
IgG (mg/dL) 700-1,600 952 1,175 1,274
IgG1 (mg/dL) 382-928 489.9 667.5 727
IgG2 (mg/dL) 241-700 369 431.2 475
IgG3 (mg/dL) 21.8-176.1 9.5 12.2 8.8
IgG4 (mg/dL) 3.9-86.4 5.5 5.7 7.7

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Jae-Woo Jung
https://orcid.org/http://orcid.org/0000-0002-9414-5934

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