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Posttranslational modifications of the insulin-like growth factor-binding protein 3 in patients with type 2 diabetes mellitus assessed by affinity chromatography. J Chromatogr B Analyt Technol Biomed Life Sci 2012; 904:93-8. [DOI: 10.1016/j.jchromb.2012.07.028] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2012] [Revised: 06/29/2012] [Accepted: 07/24/2012] [Indexed: 01/23/2023]
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Wang Y, Zhang J, Huang L, He D, Ma L, Ouyang J, Jiang F. Novel Application of Ag Nanoclusters in Fluorescent Imaging of Human Serum Proteins after Native Polyacrylamide Gel Electrophoresis (PAGE). Chemistry 2012; 18:1432-7. [DOI: 10.1002/chem.201101310] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2011] [Revised: 10/21/2011] [Indexed: 11/07/2022]
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Talaei-Khozani T, Monsefi M, Ghasemi M. Lectins influence chondrogenesis and osteogenesis in limb bud mesenchymal cells. Glycoconj J 2011; 28:89-98. [DOI: 10.1007/s10719-011-9326-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2010] [Revised: 02/07/2011] [Accepted: 02/08/2011] [Indexed: 10/18/2022]
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Investigation of different molecular forms of IGFBP-1 using immobilised metal-, immuno- and lectin-affinity chromatography. JOURNAL OF THE SERBIAN CHEMICAL SOCIETY 2010. [DOI: 10.2298/jsc100330090l] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Insulin-like growth factor-binding protein 1 (IGFBP-1) is a member of a family of six homologous proteins that regulate the action of the insulin-like growth factors. IGFBP-1 is a 25 kDa protein that beside its native form, may exist in several phosphoforms (30 kDa), which are predominant in the circulation of humans. Phosphorylation of IGFBP-1 is a post-translational modification that has a great influence on the IGF-I action. IGFBP-1 forms multimers and complexes with ?2-macroglobulin (?2M). Polymerisation of IGFBP-1 was also reported. In order to analyse and separate these IGFBP-1 molecular species, affinity chromatography methods were used in this study. The results demonstrated that most of the IGFBP-1 circulates in complexes with ?2M, which can be isolated by affinity chromatography using immobilised anti-?2M antibodies. IGFBP- 1/?2M complexes may be differentiated from IGFBP-1 dimer and multimers using lectin-affinity chromatography, since the latter do not interact with lectins. It seems that the complexes contain not only monomeric IGFBP-1, but also its multimers. Dimer and multimers are stable under reducing conditions, suggesting covalent linkage between units. Free IGFBP-1 monomer can be separated from multimers using Con A-affinity chromatography. The concentration of free IGFBP-1 is relatively low in the circulation.
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