TCF7L2 rs7903146 polymorphism and diabetic nephropathy association is not independent of type 2 diabetes -a study in a south Indian population and meta-analysis Związek między polimorfizmem rs7903146 genu TCF7L2 a nefropatią cukrzycową nie jest niezależny od cukrzycy typu 2 -badanie populacji Indii Południowych i metaanaliza AbstractDiabetic nephropathy (DN) is a chronic microangiopathic complication of both type 1 (T1DM) and type 2 diabetes mellitus (T2DM). The TCF7L2 gene has been reported to be associated with type 2 diabetes risk. We aimed to investigate the impact of TCF7L2 gene on the susceptibility of T2DM and DN in a south Indian population. Plus to evaluate the association of rs7903146 in the TCF7L2 gene with T2DM in the Indian population. The subjects recruited for this included 55 diabetic cases with diabetic nephropathy, 68 diabetic cases without nephropathy, and 82 non-diabetic healthy controls. Genomic DNA was isolated from blood and genotyping of TCF7L2 rs7903146 was performed by PCR-RFLP analysis. A literature survey was carried out into the effect of rs7903146 on genetic susceptibility to T2DM in Indian populations and we then performed a meta-analysis in order to evaluate its association with T2DM. Analysis of TCF7L2 rs7903146 in normal controls and diabetics with or without nephropathy demonstrated that the 'T' allele is associated with both diabetes (p = 0.049) and DN (p = 0.024), but this association is not independent of T2DM. Meta-analysis showed that the mutant allele and genotypes are associated with T2DM in Indian populations. In summary, a significant association exists between the 'T' allele and DN, but this association is not independent of T2DM. Pooled meta-analysis of studies on rs7903146 and T2DM confirmed that rs7903146 is significantly associated with susceptibility to T2DM in Indian populations. (Endokrynol Pol 2014; 65 (4): 298-305) Key words: TCF7L2 gene; SNP; diabetic nephropathy StreszczenieNefropatia cukrzycowa (DN, diabetic nephropathy) jest przewlekłym powikłaniem o charakterze mikroangiopatii występującym zarówno w cukrzycy typu 1 (T1DM, type 1 diabetes mellitus), jak i typu 2 (T2DM, type 2 diabetes mellitus). Gen TCF7L2 jest związany z ryzykiem cukrzycy typu 2. Badanie przeprowadzono w celu dokonania oceny wpływu genu TCF7L2 na podatność na zachorowanie na T2DM i DN w populacji Indii Południowych oraz oceny związku między występowaniem polimorfizmu rs7903146 genu TCF7L2 i T2DM w populacji południowej części Indii. Do badania włączono 55 przypadków chorych na cukrzycę z nefropatią cukrzycową, 68 przypadków cukrzycy bez nefropatii i 82 osoby niechorujące na cukrzycę jako grupę kontrolną. Genomowe DNA izolowano z krwi i przeprowadzono genotypowanie polimorfizmu rs7903146 genu TCF7L2 metodą analizy PCR-RFLP. Przeprowadzono również przegląd literatury pod kątem danych dotyczących wpływu występowania polimorfizmu rs7903146 na genetyczną podatność na T2DM w populacji hinduskiej, a następnie przeprowadzono metaanalizę w celu oceny jego związku z T2DM. Analiza polimorfizmu r...
Diabetes mellitus (DM) is a complicated metabolic illness that has had a worldwide impact and placed an unsustainable load on both developed and developing countries’ health care systems. According to the International Diabetes Federation, roughly 537 million individuals had diabetes in 2021, with type 2 diabetes mellitus accounting for the majority of cases (T2DM). T2DM is a chronic illness defined by insufficient insulin production from pancreatic islet cells. T2DM generates various micro and macrovascular problems, with diabetic nephropathy (DN) being one of the most serious microvascular consequences, and which can lead to end-stage renal disease. The zebrafish (Danio rerio) has set the way for its future as a disease model organism. As numerous essential developmental processes, such as glucose metabolism and reactive metabolite production pathways, have been identified in zebrafish that are comparable to those seen in humans, it is a good model for studying diabetes and its consequences. It also has many benefits over other vertebrate models, including the permeability of its embryos to small compounds, disease-driven therapeutic target selection, in vivo validation, and deconstruction of biological networks. The organism can also be utilized to investigate and understand the genetic abnormalities linked to the onset of diabetes problems. Zebrafish may be used to examine and visualize the growth, morphology, and function of organs under normal physiological and diabetic settings. The zebrafish has become one of the most useful models for studying DN, especially when combined with genetic alterations and/or mutant or transgenic fish lines. The significant advancements of CRISPR and next-generation sequencing technology for disease modelling in zebrafish, as well as developments in molecular and nano technologies, have advanced the understanding of the molecular mechanisms of several human diseases, including DN. In this review, we emphasize the physiological and pathological processes relating to microvascular problems in zebrafish, as well as the many experimental zebrafish models used to research DN, and the DN-related outcomes and mechanisms observed in zebrafish.
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