Polymorphisms in inflammation-related genes and the risk of primary varicose veins in ethnic Russians

Abstract

Inflammation was shown to be activated in varicose veins, although its role in the development of vein wall transformation remains inconclusive. We aimed to investigate the influence of 13 inflammation-related single nucleotide polymorphisms (SNPs) TNF rs1800629 and rs3093661, IL1A rs1800587, IL1RN rs4251961, IL6 rs1800795 and rs1800796, IFNG rs2430561, IL10 rs1800896, TGFB1 rs1800469, HIF1A rs11549465, NFKB1 rs28362491, and rs4648068 on the risk of primary varicose veins (PVVs) in ethnic Russians. We genotyped 709 patients with PVVs and 278 individuals without a history of chronic venous disease and performed a single SNP and a haplotype analysis. Several associations with P < 0.05 were revealed in our study. Variant allele HIF1A rs11549465 T, TNF rs3093661 A, and NFKB1 rs28362491 ATTG deletion showed the reverse association with PVV risk, and allele IL6 rs1800795 C was associated with the increased risk of the studied pathology. Haplotype analysis revealed associations of TNF haplotypes rs3093661 A-rs1800629 G and IL6 rs1800795 C-rs1800796 G with the decreased and the increased risk of PVVs, correspondingly. However, all the observed associations failed to reach statistical significance after the correction for multiple testing, which was set at a level of 10 due to many tests performed. Our study therefore provides evidence that investigated polymorphisms do not play a major role in susceptibility to PVVs.

Varicose veins: on the verge of discovering the cause?

“…Причиной запуска веноспецифического воспаления может быть, в том числе, повышение экспрессии провоспалительных цитокинов в ответ на изменяющуюся гемодинамику и гипоксию эндотелия. Перерастяжение вены, кумуляция свободных радикалов, вызванная активацией NADPH оксидазы и скоплением в окружающих тканях железа из разрушенного гемоглобина, приводят к провокации воспалительного ответа [56]. При этом он оказывается локальным, о чем свидетельствует уравнивание концентраций цитокинов в системном кровотоке и в крови из варикозных вен.…”