Attenuated IGF-1 predicts all-cause and cardiovascular mortality in a Black population: A five-year prospective study.

Autor:	Schutte AE; Hypertension in Africa Research Team (HART), North-West University, Potchefstroom, South Africa Medical Research Council, Unit for Hypertension and Cardiovascular Disease, North-West University, Potchefstroom, South Africa alta.schutte@nwu.ac.za., Conti E; Department of Clinical and Molecular Medicine, University of Rome, Sapienza, Italy., Mels CM; Hypertension in Africa Research Team (HART), North-West University, Potchefstroom, South Africa., Smith W; Hypertension in Africa Research Team (HART), North-West University, Potchefstroom, South Africa., Kruger R; Hypertension in Africa Research Team (HART), North-West University, Potchefstroom, South Africa., Botha S; Hypertension in Africa Research Team (HART), North-West University, Potchefstroom, South Africa., Gnessi L; Department of Experimental Medicine, Pathophysiology and Endocrinology Unit, University of Rome, Sapienza, Italy., Volpe M; Department of Clinical and Molecular Medicine, University of Rome, Sapienza, Italy IRCCS Neuromed, Pozzilli, Italy., Huisman HW; Hypertension in Africa Research Team (HART), North-West University, Potchefstroom, South Africa Medical Research Council, Unit for Hypertension and Cardiovascular Disease, North-West University, Potchefstroom, South Africa.
Jazyk:	angličtina
Zdroj:	European journal of preventive cardiology [Eur J Prev Cardiol] 2016 Nov; Vol. 23 (16), pp. 1690-1699. Date of Electronic Publication: 2016 Jul 22.
DOI:	10.1177/2047487316661436
Abstrakt:	Background: Inconsistent findings are reported on whether insulin-like growth factor-1 (IGF-1) is protective or harmful in predicting hypertension, carotid wall thickness and mortality. We determined the five-year prognostic value of IGF-1 for these outcomes in a large Black population prone to hypertension and cardiovascular disease. Design: A longitudinal study as part of the PURE (Prospective Urban and Rural Epidemiology) study, North West Province, South Africa. Methods: We measured IGF-1 and IGF binding protein-3 (IGFBP-3) in 1038 HIV-uninfected participants (age range 32-94 years) and assessed blood pressure, carotid intima-media thickness and mortality. Results: Over five years 116 deaths occurred. Baseline IGF-1 was similar in survivors and non-survivors (p = 0.50), but tended to be higher in survivors upon adjustment for IGFBP-3 and covariates (p = 0.061). Normotensives and hypertensives (p = 0.072), and those with carotid intima-media thickness < 0.9 mm and ≥ 0.9 mm also displayed similar baseline IGF-1 (p = 0.55). Multivariable-adjusted Cox-regression indicated high IGF-1 predicting lower risk for all-cause mortality (hazard ratio 0.45; 0.23-0.88) and cardiovascular mortality (hazard ratio 0.26; 0.08-0.83) when also adjusting for IGFBP-3. When including normo- and hypertensives at baseline, high IGF-1 was related to normotension at follow-up (hazard ratio 0.68; 0.49-0.95). We found no association with carotid intima-media thickness (hazard ratio 0.59; 0.31-1.14). Conclusion: In a Black South African population with low socio-economic status and harmful health behaviours, we found a protective independent association between IGF-1 and hypertension, cardiovascular and all-cause mortality, with no association with carotid wall thickness. (© The European Society of Cardiology 2016.)
Databáze:	MEDLINE
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