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1.
  • Fuchsberger, Christian, et al. (creator_code:aut_t)
  • The genetic architecture of type 2 diabetes
  • 2016
  • record:In_t: Nature. - : Springer Science and Business Media LLC. - 0028-0836 .- 1476-4687. ; 536:7614, s. 41-47
  • swepub:Mat_article_t (swepub:level_refereed_t)abstract
    • The genetic architecture of common traits, including the number, frequency, and effect sizes of inherited variants that contribute to individual risk, has been long debated. Genome-wide association studies have identified scores of common variants associated with type 2 diabetes, but in aggregate, these explain only a fraction of the heritability of this disease. Here, to test the hypothesis that lower-frequency variants explain much of the remainder, the GoT2D and T2D-GENES consortia performed whole-genome sequencing in 2,657 European individuals with and without diabetes, and exome sequencing in 12,940 individuals from five ancestry groups. To increase statistical power, we expanded the sample size via genotyping and imputation in a further 111,548 subjects. Variants associated with type 2 diabetes after sequencing were overwhelmingly common and most fell within regions previously identified by genome-wide association studies. Comprehensive enumeration of sequence variation is necessary to identify functional alleles that provide important clues to disease pathophysiology, but large-scale sequencing does not support the idea that lower-frequency variants have a major role in predisposition to type 2 diabetes.
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  • Hamberg, U, et al. (creator_code:aut_t)
  • Human kininogen from Cohns Fraction IV : comparisons of antigenicity and multiple forms
  • 1979
  • record:In_t: Advances in Experimental Medicine and Biology. - 0065-2598 .- 2214-8019. ; 120B, s. 173-183
  • swepub:Mat_article_t (swepub:level_refereed_t)abstract
    • Kininogen was isolated from Cohns fraction IV by DEAE-chromatography, gel filtration and ammonium sulphate precipitation. Immunologically pure kininogen was prepared by removal of protein impurities using specific immunoadsorbents with Sepharose-bound antibody. Anti-kininogen serum was raised in rabbits against the pure antigen. Comparison with anti-kininogen sera prepared with the biologically active LMW antigen from whole plasma suggested antigenic identity by double immunodiffusion analysis. The Cohn-kininogen was shown to contain mainly two components (85%) in about equal amounts focusing with peaks at pI 4.2 (42%) and pI 4.3 (43%). These represent apparently structurally altered forms of the native plasma kininogen focusing at pI 4.5-4.6 (54%), which occurred as a minor component (13%).
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  • Ingelsson, Erik, et al. (creator_code:aut_t)
  • Detailed Physiologic Characterization Reveals Diverse Mechanisms for Novel Genetic Loci Regulating Glucose and Insulin Metabolism in Humans
  • 2010
  • record:In_t: Diabetes. - 0012-1797 .- 1939-327X. ; 59:5, s. 1266-1275
  • swepub:Mat_conferencepaper_t (swepub:level_refereed_t)abstract
    • OBJECTIVE-Recent genome-wide association studies have revealed loci associated with glucose and insulin-related traits. We aimed to characterize 19 such loci using detailed measures of insulin processing, secretion, and sensitivity to help elucidate their role in regulation of glucose control, insulin secretion and/or action. RESEARCH DESIGN AND METHODS-We investigated associations of loci identified by the Meta-Analyses of Glucose and Insulin-related traits Consortium (MAGIC) with circulating proinsulin, measures of insulin secretion and sensitivity from oral glucose tolerance tests (OGTTs), euglycemic clamps, insulin suppression tests, or frequently sampled intravenous glucose tolerance tests in nondiabetic humans (n = 29,084). RESULTS-The glucose-raising allele in MADD was associated with abnormal insulin processing (a dramatic effect on higher proinsulin levels, but no association with insulinogenic index) at extremely persuasive levels of statistical significance (P = 2.1 x 10(-71)). Defects in insulin processing and insulin secretion were seen in glucose-raising allele carriers at TCF7L2, SCL30A8, GIPR, and C2CD4B. Abnormalities in early insulin secretion were suggested in glucose-raising allele carriers at MTNR1B, GCK, FADS1, DGKB, and PROX1 (lower insulinogenic index; no association with proinsulin or insulin sensitivity). Two loci previously associated with fasting insulin (GCKR and IGF1) were associated with OGTT-derived insulin sensitivity indices in a consistent direction. CONCLUSIONS-Genetic loci identified through their effect on hyperglycemia and/or hyperinsulinemia demonstrate considerable heterogeneity in associations with measures of insulin processing, secretion, and sensitivity. Our findings emphasize the importance of detailed physiological characterization of such loci for improved understanding of pathways associated with alterations in glucose homeostasis and eventually type 2 diabetes. Diabetes 59:1266-1275, 2010
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  • Isine Bolstad, Anne, et al. (creator_code:aut_t)
  • Association between genetic variants in the tumour necrosis factor/lymphotoxin alpha/lymphotoxin beta locus and primary Sjogrens syndrome in Scandinavian samples
  • 2012
  • record:In_t: Annals of the Rheumatic Diseases. - : BMJ Publishing Group. - 0003-4967 .- 1468-2060. ; 71:6, s. 981-988
  • swepub:Mat_article_t (swepub:level_refereed_t)abstract
    • Objectives Lymphotoxin beta (LTB) has been found to be upregulated in salivary glands of patients with primary Sjogrens syndrome (pSS). An animal model of pSS also showed ablation of the lymphoid organisation and a marked improvement in salivary gland function on blocking the LTB receptor pathway. This study aimed to investigate whether single-nucleotide polymorphisms (SNP) in the lymphotoxin alpha (LTA)/LTB/tumour necrosis factor (TNF) gene clusters are associated with pSS. less thanbrgreater than less thanbrgreater thanMethods 527 pSS patients and 532 controls participated in the study, all of Caucasian origin from Sweden and Norway. 14 SNP markers were genotyped and after quality control filtering, 12 SNP were analysed for their association with pSS using single marker and haplotype tests, and corrected by permutation testing. less thanbrgreater than less thanbrgreater thanResults Nine markers showed significant association with pSS at the p=0.05 level. Markers rs1800629 and rs909253 showed the strongest genotype association (p=1.64E-11 and p=4.42E-08, respectively, after correcting for sex and country of origin). When the analysis was conditioned for the effect of rs1800629, only the association with rs909253 remained nominally significant (p=0.027). In haplotype analyses the strongest effect was observed for the haplotype rs909253G_rs1800629A (p=9.14E-17). The associations were mainly due to anti-Ro/SSA and anti-La/SSB antibody-positive pSS. less thanbrgreater than less thanbrgreater thanConclusions A strong association was found between several SNP in the LTA/LTB/TNF alpha locus and pSS, some of which led to amino acid changes. These data suggest a role for this locus in the development of pSS. Further studies are needed to examine if the genetic effect described here is independent of the known genetic association between HLA and pSS.
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