Disease Markers

Disease Markers / 2012 / Article

Open Access

Volume 33 |Article ID 802145 | 10 pages | https://doi.org/10.3233/DMA-2012-0909

SP-D Polymorphisms and the Risk of COPD

Received11 Jul 2012
Accepted11 Jul 2012


Introduction: There are limited data linking serum levels of surfactant protein D, its genetic polymorphisms to the risk of Chronic Obstructive Pulmonary Disease (COPD). Objectives: We sought to investigate these relationships using a case control study design.Methods: Post bronchodilator values of FEV1/FVC <0.7 were used to diagnose COPD patients (n = 115). Controls were healthy subjects with normal spirometry (n = 106) Single nucleotide polymorphisms (rs721917, rs2243639, rs3088308) were genotyped using polymerase chain reaction (PCR) and restriction analysis. Serum SP-D levels were measured using a specific immunoassay.Results: Allele ‘A’ at rs3088308 (p < 0.00, B = −0.41) and ‘C’ allele at rs721917 (p = 0.03; B = −0.30) were associated with reduced serum SP-D levels. Genotype ‘T/T’ at rs721917 was significantly associated with risk of COPD (p = 0.01). Patients with repeat exacerbations had significantly higher serum SP-D even after adjusting for genetic factors.Conclusions: We report for the first time that rs3088308 is an important factor influencing systemic SP-D levels and confirm the previous association of rs721917 to the risk of COPD and serum SP-D levels.

Copyright © 2012 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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