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Genetic Diversity in Bronchial Asthma Susceptibility: Exploring the Role of Vitamin D Receptor Gene Polymorphisms in Varied Geographic Contexts.

Authors
  • Paramonova, Natalia1
  • Trapina, Ilva1
  • Gradauskiene Sitkauskiene, Brigita2
  • Plavina, Samanta1
  • Tamasauskiene, Laura2
  • Bastyte, Daina2
  • Rumba-Rozenfelde, Ingrida3
  • Tapina, Sandra3
  • Stakaitiene, Ieva4
  • Ugenskiene, Rasa4
  • Shih-Hsin Wu, Lawrence5, 6
  • Wang, Jiu-Yao6, 7
  • Hsieh, Miao-Hsi6
  • Chen, Pei-Chi6
  • Sjakste, Nikolajs1
  • 1 Laboratory of Genomics and Bioinformatics, Institute of Biology, University of Latvia, LV-1004 Riga, Latvia. , (Latvia)
  • 2 Department of Immunology and Allergology, Lithuanian University of Health Sciences, LT-50161 Kaunas, Lithuania. , (Lithuania)
  • 3 Faculty of Medicine, University of Latvia, LV-1586 Riga, Latvia. , (Latvia)
  • 4 Department of Genetics and Molecular Medicine, Lithuanian University of Health Sciences, LT-50161 Kaunas, Lithuania. , (Lithuania)
  • 5 Graduate Institute of Biomedical Sciences, China Medical University, Taichung 406040, Taiwan. , (China)
  • 6 Research Center of Allergy, Immunology, and Microbiome (AIM), China Medical University Hospital, Taichung 404327, Taiwan. , (China)
  • 7 Department of Allergy and Immunology, China Medical University Children's Hospital, Taichung 404327, Taiwan. , (China)
Type
Published Article
Journal
International Journal of Molecular Sciences
Publisher
MDPI AG
Publication Date
Feb 05, 2024
Volume
25
Issue
3
Identifiers
DOI: 10.3390/ijms25031943
PMID: 38339221
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

Bronchial asthma (BA) exhibits varying prevalence across global populations, prompting a comprehensive investigation into genetic and environmental determinants. Vitamin D is a potent immunomodulator capable of suppressing inflammatory signals in several cell types involved in the asthmatic response; it exerts effects on the immune system by binding to the nuclear vitamin D receptor (VDR). VDR gene genetic variations are affecting serum vitamin D levels with a possible role in the BA risk. The current study aimed to examine the complex interaction of various factors (genetic background, serum vitamin D levels, and geographic location) to identify differences in the influence of these factors on the susceptibility to asthma between populations at different latitudes. Focusing on Eastern European cohorts from Latvia and Lithuania and comparing them with published data on East Asian populations, we explore the impact of VDR gene polymorphisms on BA susceptibility. Genotyping four key VDR SNPs and assessing their association with 25-hydroxyvitamin D levels, our study unveils significant associations of the studied loci with the risk of asthma-both risk-reducing and increasing effects, differently distributed between Baltic and East Asian populations. The functional effects of in silico VDR gene genetic variations are also identified and discussed.

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