Browsing by Subject "Asian Continental Ancestry Group"

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    Effect of monocyte chemoattractant protein-1 (MCP-1) gene polymorphism in Turkish patients with premature coronary artery disease
    (2008) Cam S.F.; Sekuri C.; Sagcan A.; Ercan E.; Tengiz I.; Alioglu E.; Berdeli A.
    Objectives. It has been suggested that monocyte chemoattractant protein-1 (MCP-1) is important in the initiation of atherosclerosis and crucial in monocyte recruitment into the subendothelial lesions. Recent studies have demonstrated that MCP-1 -2518 A>G polymorphism is associated with susceptibility to coronary artery disease (CAD). Since there are conflicting reports on the possible association of MCP-1 -2518 A>G polymorphism with CAD, we investigated the role of this polymorphism in Turkish patients with premature CAD. Material and methods. Genomic DNA was collected from 171 premature CAD patients and 151 healthy individuals. MCP-1 -2518 A>G polymorphism was genotyped using the PCR-RFLP method. Results. There were no differences between genotype distribution and allele frequencies in the premature CAD and control groups (AA: 49.7 %; AG: 40.3 %; GG: 10.0 % in premature CAD groups and AA: 53.7 %; AG: 34.4 %; GG: 11.9 % in controls; p = 0.53). The prevalence of the G allele was 0.302 in patients and 0.291 in controls. Conclusions. Our data demonstrate that MCP-1 -2518 A>G polymorphism is not associated with premature CAD in Turkish patients. Further studies are needed to elucidate the role of this polymorphism in the pathogenesis of CAD in various populations. © 2008 Informa UK Ltd (Informa Healthcare, Taylor & Francis AS).
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    Polygenic Risk Scores have high diagnostic capacity in ankylosing spondylitis
    (BMJ Publishing Group, 2021) Li Z.; Wu X.; Leo P.J.; De Guzman E.; Akkoc N.; Breban M.; MacFarlane G.J.; Mahmoudi M.; Marzo-Ortega H.; Anderson L.K.; Wheeler L.; Chou C.-T.; Harrison A.A.; Stebbings S.; Jones G.T.; Bang S.-Y.; Wang G.; Jamshidi A.; Farhadi E.; Song J.; Lin L.; Li M.; Wei J.C.-C.; Martin N.G.; Wright M.J.; Lee M.; Wang Y.; Zhan J.; Zhang J.-S.; Wang X.; Jin Z.-B.; Weisman M.H.; Gensler L.S.; Ward M.M.; Rahbar M.H.; Diekman L.; Kim T.-H.; Reveille J.D.; Wordsworth B.P.; Xu H.; Brown M.A.
    Objective We sought to test the hypothesis that Polygenic Risk Scores (PRSs) have strong capacity to discriminate cases of ankylosing spondylitis (AS) from healthy controls and individuals in the community with chronic back pain. Methods PRSs were developed and validated in individuals of European and East Asian ethnicity, using data from genome-wide association studies in 15 585 AS cases and 20 452 controls. The discriminatory values of PRSs in these populations were compared with other widely used diagnostic tests, including C-reactive protein (CRP), HLA-B27 and sacroiliac MRI. Results In people of European descent, PRS had high discriminatory capacity with area under the curve (AUC) in receiver operator characteristic analysis of 0.924. This was significantly better than for HLA-B27 testing alone (AUC=0.869), MRI (AUC=0.885) or C-reactive protein (AUC=0.700). PRS developed and validated in individuals of East Asian descent performed similarly (AUC=0.948). Assuming a prior probability of AS of 10% such as in patients with chronic back pain under 45 years of age, compared with HLA-B27 testing alone, PRS provides higher positive values for 35% of patients and negative predictive values for 67.5% of patients. For PRS, in people of European descent, the maximum positive predictive value was 78.2% and negative predictive value was 100%, whereas for HLA-B27, these values were 51.9% and 97.9%, respectively. Conclusions PRS have higher discriminatory capacity for AS than CRP, sacroiliac MRI or HLA-B27 status alone. For optimal performance, PRS should be developed for use in the specific ethnic groups to which they are to be applied. © Author(s) (or their employer(s)) 2021. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.