Comorbidity, a co-incidence of several disorders in an individual, is a common phenomenon. Their development is governed by multiple factors, including genetic variation. The current study was set up to look at associations between isolated and comorbid diseases of bronchial asthma and hypertension, on one hand, and single nucleotide polymorphisms associated with regulation of gene expression (eQTL), on the other hand. A total of 96 eQTL SNPs were genotyped in 587 Russian individuals. Bronchial asthma alone was found to be associated with rs1927914 (TLR4), rs1928298 (intergenic variant), and rs1980616 (SERPINA1); hypertension alone was found to be associated with rs11065987 (intergenic variant); rs2284033 (IL2RB), rs11191582 (NT5C2), and rs11669386 (CARD8); comorbidity between asthma and hypertension was found to be associated with rs1010461 (ANG/RNASE4), rs7038716, rs7026297 (LOC105376244), rs7025144 (intergenic variant), and rs2022318 (intergenic variant). The results suggest that genetic background of comorbidity of asthma and hypertension is different from genetic backgrounds of both diseases manifesting isolated.

Objective. To assess the association of single nucleotide polymorphisms of genes potentially involved in the comorbidity of bronchial asthma (BA) and essential hypertension (HTN) in patients with different time onset of the diseases.Design and methods. Genotyping of 92 SNPs was performed using MALDI-TOF mass spectrometry in patients with BA and HTN (n = 97) and healthy individuals (n = 153). The group of patients with comorbid pathology was divided into two subgroups depending on the time of onset of symptoms of BA relative to HTN, and the prevalence of all studied SNPs was compared in each subgroup relative to the control.Results. The variant rs11590807 regulating expression for UTP25, TRAF3IP3, C1orf74, HSD11B1-AS 1, IRF6 genes in the heart, blood vessels, and lung is associated with BA and HTN, regardless of the time onset of each of these diseases. Associations of other variants are specific with respect for each subgroup of comorbid diseases. The rs1010461 variant, which regulates the expression of RNASE4 and ANG genes, is linked with HTN as the first phenotype of the comorbidity. The rs769214, rs11032700, rs11032699, rs484214, and rs480575 variants, which regulate the expression of CAT gene, are associated with BA as the first phenotype of disease comorbidity.Conclusions. We found specific associations of the studied polymorphic variants in the development of comorbid phenotypes of BA and HTN, which differ in the time of manifestation of each of the diseases relative to each other.

Hypertension, coronary heart disease, myocardial infarction, obesity, and type 2 diabetes mellitus are common comorbidities in patients with bronchial asthma. The causes for developing these diseases are multifactorial and involve inherited genetic factors. However, little is known about the genes contributing to the development of comorbidities in bronchial asthma and cardiovascular disease continuum.Objective. To examine the associations of genetic polymorphic variants potentially involved in the development of bronchial asthma comorbid with hypertension, coronary heart disease, type 2 diabetes mellitus, and obesity.Material and Methods. Genotyping of 92 single nucleotide polymorphisms (SNPs) was performed using MALDI-TOF mass spectrometry in patients with bronchial asthma associated with cardiovascular/metabolic disorders (n = 162) compared with a control group of apparently healthy individuals (n = 153).Results. The development of bronchial asthma phenotypes comorbid with cardiovascular/metabolic disorders was associated with the particular genetic variants affecting the expression of genes including CAT, TLR4, ELF5, ABTB2, UTP25, TRAF3IP3, NFKB1, LOC105377347, C1orf74, IRF6, and others in the target organs of study disease profile. Only one SNP (rs11590807), which is regulatory for the UTP25, IRF6, TRAF3IP3, and RP1-28O10.1 genes, was associated with all studied comorbid phenotypes of bronchial asthma and diseases of cardiovascular continuum.Conclusion. The obtained results demonstrated that the identified SNPs affecting the expression of many genes may serve as potential biological markers of complex causal relationships between bronchial asthma and cardiometabolic disorders.