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Um CY, Fedirko V, Flanders WD, Höflich C, Wirthgen E, Bostick RM. Circulating insulin-like growth factor-related biomarkers: Correlates and responses to calcium supplementation in colorectal adenoma patients. Mol Carcinog 2017; 56:2127-2134. [PMID: 28467661 DOI: 10.1002/mc.22669] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2016] [Revised: 04/24/2017] [Accepted: 05/01/2017] [Indexed: 01/09/2023]
Abstract
Circulating insulin-like growth factor 1 (IGF-1) may be directly associated with colorectal cancer risk, and IGF binding protein 3 (IGFBP-3) is one of the most abundantly expressed binding proteins in various cancers. Calcium intakes, primarily from food, have been directly associated with circulating IGF-1, but whether supplemental calcium affects IGF-1 and IGFBP-3 is unknown. We tested the effects of 1.0 and 2.0 g of supplemental elemental calcium daily on circulating IGF-1 and IGFBP-3 concentrations in colorectal adenoma patients in a randomized, double-blinded, placebo-controlled clinical trial (n = 193). IGF-1 and IGFBP-3 were quantified using enzyme-linked immunoassay and quantitative Western ligand blot, respectively. We also assessed cross-sectional associations of these biomarkers with participants' baseline characteristics. We found no appreciable effect of calcium relative to placebo on circulating IGF-1, IGFBP-3, or the IGF-1:IGFBP-3 molar ratio. Mean IGF-1 concentrations were 11.1% higher in those with greater milk intakes (P = 0.05). Mean IGF-1 and IGFBP-3 concentrations were, respectively, 18.0% (P = 0.003) and 16.5% (P = 0.01) higher in men and were monotonically lower with increasing age (both P = 0.01). IGFBP-3 was 17.7% higher among those with higher relative to no alcohol consumption (P = 0.04). While these results support previous findings that IGF-1 concentrations are higher with greater milk intakes, and IGF-1 and IGFBP-3 concentrations differ according to sex and age, they provide no evidence to suggest that supplemental calcium appreciably affects circulating IGF-1, IGFBP-3, or the IGF-1:IGFBP-3 molar ratio in sporadic colorectal adenoma patients.
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Affiliation(s)
- Caroline Y Um
- Nutrition and Health Sciences Program, Emory University, Atlanta, Georgia
| | - Veronika Fedirko
- Nutrition and Health Sciences Program, Emory University, Atlanta, Georgia.,Department of Epidemiology,, Emory University, Atlanta, Georgia.,Winship Cancer Institute, Emory University, Atlanta, Georgia
| | - W Dana Flanders
- Department of Epidemiology,, Emory University, Atlanta, Georgia.,Winship Cancer Institute, Emory University, Atlanta, Georgia
| | | | - Elisa Wirthgen
- Ligandis GbR, Gülzow, Germany.,Institute of Genome Biology, Leibniz Institute for Farm Animal Biology (FBN), Dummerstorf, Germany
| | - Roberd M Bostick
- Nutrition and Health Sciences Program, Emory University, Atlanta, Georgia.,Department of Epidemiology,, Emory University, Atlanta, Georgia.,Winship Cancer Institute, Emory University, Atlanta, Georgia
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Crowe FL, Key TJ, Allen NE, Appleby PN, Roddam A, Overvad K, Grønbaek H, Tjønneland A, Halkjaer J, Dossus L, Boeing H, Kröger J, Trichopoulou A, Dilis V, Trichopoulos D, Boutron-Ruault MC, De Lauzon B, Clavel-Chapelon F, Palli D, Berrino F, Panico S, Tumino R, Sacerdote C, Bueno-de-Mesquita HB, Vrieling A, van Gils CH, Peeters PHM, Gram IT, Skeie G, Lund E, Rodríguez L, Jakszyn P, Molina-Montes E, Tormo MJ, Barricarte A, Larrañaga N, Khaw KT, Bingham S, Rinaldi S, Slimani N, Norat T, Gallo V, Riboli E, Kaaks R. The association between diet and serum concentrations of IGF-I, IGFBP-1, IGFBP-2, and IGFBP-3 in the European Prospective Investigation into Cancer and Nutrition. Cancer Epidemiol Biomarkers Prev 2009; 18:1333-40. [PMID: 19423514 DOI: 10.1158/1055-9965.epi-08-0781] [Citation(s) in RCA: 102] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Circulating concentrations of insulin-like growth factor I (IGF-I) and IGF binding proteins (IGFBP) have been associated with the risk of several types of cancer. Dietary correlates of IGF-I and IGFBPs are not yet well established. The objective of this study was to assess the association between dietary intake and serum concentrations of IGF-I, IGFBP-1, IGFBP-2, and IGFBP-3 in a cross-sectional analysis of 4,731 men and women taking part in the European Prospective Investigation into Cancer and Nutrition. Diet was assessed using country-specific validated dietary questionnaires. Serum concentrations of IGF-I, IGFBP-1, IGFBP-2 and IGFBP-3 were measured, and the associations between diet and IGF-I and IGFBPs were assessed using multiple linear regression adjusting for sex, age, body mass index, smoking status, and alcohol and energy intake. Each 1 SD increment increase in total and dairy protein and calcium intake was associated with an increase in IGF-I concentration of 2.5%, 2.4%, and 3.3%, respectively (P for trend <0.001 for all) and a decrease in IGFBP-2 of 3.5%, 3.5%, and 5.4% (P for trend <0.001 for all), respectively. There were no significant associations between the intake of protein or calcium from nondairy sources and IGF-I. The results from this large cross-sectional analysis show that either the intake of dairy protein or calcium is an important dietary determinant of IGF-I and IGFBP-2 concentrations; however, we suggest that it is more likely to be protein from dairy products.
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