Effect of Surfactant Protein B and D Genes Polymorphisms on Frequency and Severity of Acute Bronchiolitis

Authors : Buket Altıntaş Seyyah, Ali Gül, Şahin Takçı, Hacı Ömer Ateş, Resul Yılmaz

Pages : 1-5

Doi:10.16899/jcm.1605226

View : 38 | Download : 58

Publication Date : 2025-01-31

Article Type : Research Paper

Abstract :Background and aim: Acute bronchiolitis (AB) is the most common cause of hospitalization in infants. Varying bronchiolitis presentations in patients with similar demographic characteristics suggest genetic causes of individual differences. Materials and Methods: The study included 106 infants diagnosed with AB and 107 healthy infants recruited from a pediatric outpatient clinic. Genotyping was conducted for intron 4 and C/A–18 in the SP-B gene, along with SP-D/160 (Ala160Thr) and SP-D/270 (Ser270Thr) polymorphisms in the SP-D gene. Results: The SP-B intron 4 invariant polymorphisms of ins/ins and ins/del were 93.40% and 4.72% in the AB group and 84.11% and 15.89% in the control group, respectively (p = 0.012). Frequency of polymorphism in the SP-D/270 (Ser270Thr) gene for Ser/Ser and Ser/Thr was 60% and 39.05% in the AB group and 79.44% and 18.69% in the control group, respectively (p = 0.004). The frequencies of Ser and Thr alleles were 79.90% and 20.10% in the AB group and 88.79% and 11.21% in the control group, respectively (p = 0.012). There was no observed correlation between the SP-B intron 4 and C/A-1, as well as the SP-D Ser270Thr and Ala160Thr polymorphisms, with the severity of AB (p > 0.05). Conclusion: SP-B gene polymorphisms were identified as risk factors for AB, while SP-D polymorphisms appeared to play a protective role. However, these polymorphisms were not linked to AB severity. Early identification of children at risk could enable close monitoring and preventive care.
Keywords : akut bronşiolit, surfaktan protein, polimorfizm, solunum yolları