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Implications for prostate cancer of insulin-like growth factor-I (IGF-I) genetic variation and circulating IGF-I levels
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2007 (English)In: Journal of Clinical Endocrinology and Metabolism, ISSN 0021-972X, E-ISSN 1945-7197, Vol. 92, no 12, p. 4820-4826Article in journal (Refereed) Published
Abstract [en]

Background: Elevated levels of circulating IGF-I have consistently been associated with increased prostate cancer risk. We recently found a haplotype in the 3 ' region of the IGF-I gene associated with increased risk of prostate cancer, and we hypothesized that the observed association is mediated by circulating IGF-I. Materials and Methods: We analyzed haplotypes and three haplotype-tagging single nucleotide polymorphisms (htSNPs) in the 3 ' region of the IGF-I gene in relation to circulating levels IGF-I in 698 control subjects from the CAncer Prostate in Sweden ( CAPS) study and 575 cases and controls from the prospective Northern Sweden Health and Disease Cohort ( NSHDC) study. We also performed a meta-analysis of these two and four other association studies on genetic variation in the 3 ' region of the IGF-I gene in relation to circulating IGF-I levels. Results: The IGF-I haplotype previously associated with prostate cancer risk, labeled "TCC," was associated with elevated levels of IGF-I in the CAPS study (P = 0.02), but not in the NSHDC study. In contrast, two of the three IGF-I htSNPs tagging this haplotype, rs6220 and rs7136446, were associated with elevated levels of IGF-I in the NSHDC ( P = 0.03 and P = 0.04, respectively), but not in the CAPS study. In the meta-analysis, the TCC haplotype and the rs6220 SNP were associated with elevated levels of circulating IGF-I ( P = 0.001 and P < 0.0001, respectively). Conclusions: Genetic variation in the 3 ' region of the IGF-I gene seems to influence circulating levels of IGF-I. This observation is consistent with the hypothesis that variation in the IGF-I gene plays a role in prostate cancer susceptibility by influencing circulating levels of IGF-I.

Place, publisher, year, edition, pages
Umea Univ Hosp, Dept Surgical & Perioperative Sci, S-90185 Umea, Sweden. Umea Univ Hosp, Dept Urol Androl, S-90185 Umea, Sweden. Umea Univ Hosp, Dept Publ Hlth & Clin Med, S-90185 Umea, Sweden. Int Agcy Res Canc, F-69372 Lyon, France. Karolinska Inst, Dept Med Epidemiol & Biostat, S-17177 Stockholm, Sweden. Univ Med Ctr Utrecht, Julius Ctr Hlth Sci & Primary Care, NL-85500 Utrecht, Netherlands. Harvard Univ, Dept Epidemiol, Boston, MA 02215 USA. German Canc Res Ctr, Div Canc Epidemiol, D-69120 Heidelberg, Germany.: ENDOCRINE SOC , 2007. Vol. 92, no 12, p. 4820-4826
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URN: urn:nbn:se:mdh:diva-40709DOI: 10.1210/jc.2007-0887ISI: 000251399700051PubMedID: 17911177OAI: oai:DiVA.org:mdh-40709DiVA, id: diva2:1246075
Available from: 2018-09-06 Created: 2018-09-06 Last updated: 2018-09-06Bibliographically approved

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Bälter, Katarina

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