rs7124442

This international doctoral thesis examined gene-physical activity interactions in fibromyalgia through six studies analyzing 64 SNPs across 34 candidate genes in Spanish women. The case-control study (314 fibromyalgia cases vs. 112 controls) identified associations of rs841 (GCH1), rs1799971 (OPRM1), and rs2097903 (COMT) with fibromyalgia susceptibility (p=0.04, p=0.02, and p=0.04 respectively). Cross-sectional studies (n=274-276 fibromyalgia patients) found that SCN9A rs4453709 and other genetic polymorphisms interacted with physical activity to influence pain, fatigue, and resilience outcomes.

A case-control study of 248 asthmatic children and 249 healthy controls examining the BDNF Val66Met polymorphism (rs6265). The Met/Met variant was associated with increased asthma risk (OR=4.17, p=0.018), while the Val/Met genotype was protective (OR=0.69, p=0.045), especially in girls (OR=0.34, p=0.001). These findings suggest BDNF gene variations contribute to asthma susceptibility in children.

This functional study identifies 119 SNPs in miRNA-binding sites within 3'UTRs of 53 genes implicated in prion disease and other neurodegenerative disorders. The paper uses bioinformatics to predict SNPs affecting miRNA binding and experimentally validates key interactions, particularly rs9291296 in GABRα4 which strengthens miR-26a-5p binding (ΔΔG = 2.3 kcal/mol). The study finds that GABA receptor subunits are notably enriched for miRNA-targeting SNPs.

Meta-analysis of 28 studies (range 38-7,173 participants) found no significant association between BDNF genetic variants and major depressive disorder. Val66Met (rs6265) showed OR=0.96 (95% CI: 0.89-1.05; P=0.402), and gene-based analysis of 17 total BDNF SNPs indicated no cumulative association with MDD (all P>0.21).

This doctoral thesis conducted multiple candidate gene association studies in 274-426 southern Spanish women with fibromyalgia to investigate gene-physical activity/sedentary behavior interactions with pain, fatigue, and resilience. Study III identified rs841 (GCH1) GG genotype (OR=0.61, p=0.04) and rs2097903 (COMT) AT/TT genotypes (OR=1.66, p=0.04) associated with fibromyalgia susceptibility, and confirmed rs1799971 (OPRM1) GG genotype (OR=0.58, p=0.02) confers genetic risk. Study IV found rs6311/rs6313 (HTR2A) polymorphisms individually associated with algometer pain score, and gene-sedentary behavior interactions involving rs4680/rs165599 (COMT), rs1383914 (ADRA1A), rs12994338/rs4453709 (SCN9A), and rs6860 (CHMP1A) significantly associated with pain outcomes. SCN9A emerged as most robust gene for fibromyalgia phenotype.