CONTEXT: Circulating IGF-I is inversely associated with ischemic heart disease incidence. Whether this association relates to alterations in plaque growth or stability, and the role of IGF-II and the major binding proteins [IGF binding protein (IGFBP)-2 and -3], is unclear. OBJECTIVE: Our objective was to test the hypothesis that circulating IGF-I is inversely, and IGF-II is positively, associated with subclinical atherosclerosis and plaque stability. DESIGN, SETTING, AND PARTICIPANTS: This was a cross-sectional analysis based on 310 participants in the United Kingdom-based Boyd Orr cohort who were aged 63-82 yr. Cohort members from Aberdeen, Bristol, Dundee, Wisbech, and London were invited to clinics for fasted venepuncture and arterial ultrasound examination. MAIN OUTCOMES: Arterial intima-media thickness, arterial plaque prevalence, and computerized assessment of plaque echogenicity (a measure of stability), undertaken using the gray scale median, were calculated. RESULTS: In total, 269 of 310 (86.8%) participants had at least one carotid or femoral plaque. In models controlling for IGFBP-3, there was a 44% (95% confidence interval 12-64%) reduction in the odds of any plaque and a 28% lower (0-48%) odds of echolucent (unstable) plaques per sd increase in IGF-I. IGFBP-3 was positively associated with plaque instability (odds ratio: 1.38; 0.99-1.93). IGF-II was positively associated (0.05-mm increase per sd; 95% confidence interval 0.01-0.09), and IGFBP-2 was inversely associated, with carotid bifurcation intima-media thickness. Neither IGF-II nor IGFBP-2 was associated with plaque prevalence or echogenicity. CONCLUSION: High-circulating IGF-I levels may promote arterial plaque stability. IGF-II and IGFBP-2 do not appear to play a role in plaque development or stability.
CONTEXT: Circulating IGF-I is inversely associated with ischemic heart disease incidence. Whether this association relates to alterations in plaque growth or stability, and the role of IGF-II and the major binding proteins [IGF binding protein (IGFBP)-2 and -3], is unclear. OBJECTIVE: Our objective was to test the hypothesis that circulating IGF-I is inversely, and IGF-II is positively, associated with subclinical atherosclerosis and plaque stability. DESIGN, SETTING, AND PARTICIPANTS: This was a cross-sectional analysis based on 310 participants in the United Kingdom-based Boyd Orr cohort who were aged 63-82 yr. Cohort members from Aberdeen, Bristol, Dundee, Wisbech, and London were invited to clinics for fasted venepuncture and arterial ultrasound examination. MAIN OUTCOMES: Arterial intima-media thickness, arterial plaque prevalence, and computerized assessment of plaque echogenicity (a measure of stability), undertaken using the gray scale median, were calculated. RESULTS: In total, 269 of 310 (86.8%) participants had at least one carotid or femoral plaque. In models controlling for IGFBP-3, there was a 44% (95% confidence interval 12-64%) reduction in the odds of any plaque and a 28% lower (0-48%) odds of echolucent (unstable) plaques per sd increase in IGF-I. IGFBP-3 was positively associated with plaque instability (odds ratio: 1.38; 0.99-1.93). IGF-II was positively associated (0.05-mm increase per sd; 95% confidence interval 0.01-0.09), and IGFBP-2 was inversely associated, with carotid bifurcation intima-media thickness. Neither IGF-II nor IGFBP-2 was associated with plaque prevalence or echogenicity. CONCLUSION: High-circulating IGF-I levels may promote arterial plaque stability. IGF-II and IGFBP-2 do not appear to play a role in plaque development or stability.
Authors: G Bellastella; M I Maiorino; R Pivonello; L F S Grasso; M Galdiero; A A Sinisi; A Colao; D Giugliano; K Esposito Journal: J Endocrinol Invest Date: 2013-06-26 Impact factor: 4.256
Authors: Elena Schiopu; Karen M Au; Maureen A McMahon; Mariana J Kaplan; Anagha Divekar; Ram R Singh; Daniel E Furst; Philip J Clements; Nagesh Ragvendra; Wenpu Zhao; Paul Maranian; Dinesh Khanna Journal: Rheumatology (Oxford) Date: 2013-12-19 Impact factor: 7.580
Authors: Sally L Ricketts; Katrijn L Rensing; Jeff M Holly; Li Chen; Elizabeth H Young; Robert Luben; Sofie Ashford; Kijoung Song; Xin Yuan; Abbas Dehghan; Benjamin J Wright; Dawn M Waterworth; Vincent Mooser; Gérard Waeber; Peter Vollenweider; Stephen E Epstein; Mary S Burnett; Joseph M Devaney; Hakon H Hakonarson; Daniel J Rader; Muredach P Reilly; John Danesh; Simon G Thompson; Alison M Dunning; Cornelia M van Duijn; Nilesh J Samani; Ruth McPherson; Nicholas J Wareham; Kay-Tee Khaw; S Matthijs Boekholdt; Manjinder S Sandhu Journal: Int J Mol Epidemiol Genet Date: 2011-08-03
Authors: Tharini Sivasubramaniyam; Stephanie A Schroer; Angela Li; Cynthia T Luk; Sally Yu Shi; Rickvinder Besla; David W Dodington; Adam H Metherel; Alex P Kitson; Jara J Brunt; Joshua Lopes; Kay-Uwe Wagner; Richard P Bazinet; Michelle P Bendeck; Clinton S Robbins; Minna Woo Journal: JCI Insight Date: 2017-07-20