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Schlueter BC, Quanz K, Baldauf J, Petrovic A, Ruppert C, Guenther A, Gall H, Tello K, Grimminger F, Ghofrani HA, Weissmann N, Seeger W, Schermuly RT, Weiss A. The diverging roles of insulin-like growth factor binding proteins in pulmonary arterial hypertension. Vascul Pharmacol 2024; 155:107379. [PMID: 38762131 DOI: 10.1016/j.vph.2024.107379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Revised: 12/29/2023] [Accepted: 05/05/2024] [Indexed: 05/20/2024]
Abstract
Pulmonary hypertension (PH) is a progressive, severe and to date not curable disease of the pulmonary vasculature. Alterations of the insulin-like growth factor 1 (IGF-1) system are known to play a role in vascular pathologies and IGF-binding proteins (IGFBPs) are important regulators of the bioavailability and function of IGFs. In this study, we show that circulating plasma levels of IGFBP-1, IGFBP-2 and IGFBP-3 are increased in idiopathic pulmonary arterial hypertension (IPAH) patients compared to healthy individuals. These binding proteins inhibit the IGF-1 induced IGF-1 receptor (IGF1R) phosphorylation and exhibit diverging effects on the IGF-1 induced signaling pathways in human pulmonary arterial cells (i.e. healthy as well as IPAH-hPASMCs, and healthy hPAECs). Furthermore, IGFBPs are differentially expressed in an experimental mouse model of PH. In hypoxic mouse lungs, IGFBP-1 mRNA expression is decreased whereas the mRNA for IGFBP-2 is increased. In contrast to IGFBP-1, IGFBP-2 shows vaso-constrictive properties in the murine pulmonary vasculature. Our analyses show that IGFBP-1 and IGFBP-2 exhibit diverging effects on IGF-1 signaling and display a unique IGF1R-independent kinase activation pattern in human pulmonary arterial smooth muscle cells (hPASMCs), which represent a major contributor of PAH pathobiology. Furthermore, we could show that IGFBP-2, in contrast to IGFBP-1, induces epidermal growth factor receptor (EGFR) signaling, Stat-3 activation and expression of Stat-3 target genes. Based on our results, we conclude that the IGFBP family, especially IGFBP-1, IGFBP-2 and IGFBP-3, are deregulated in PAH, that they affect IGF signaling and thereby regulate the cellular phenotype in PH.
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MESH Headings
- Humans
- Animals
- Receptor, IGF Type 1/metabolism
- Receptor, IGF Type 1/genetics
- Signal Transduction
- Pulmonary Artery/metabolism
- Pulmonary Artery/pathology
- Pulmonary Artery/physiopathology
- Insulin-Like Growth Factor Binding Protein 3/metabolism
- Insulin-Like Growth Factor Binding Protein 3/genetics
- Insulin-Like Growth Factor Binding Protein 2/metabolism
- Insulin-Like Growth Factor Binding Protein 2/genetics
- Insulin-Like Growth Factor I/metabolism
- Myocytes, Smooth Muscle/metabolism
- Myocytes, Smooth Muscle/pathology
- Cells, Cultured
- Male
- Insulin-Like Growth Factor Binding Protein 1/metabolism
- Insulin-Like Growth Factor Binding Protein 1/genetics
- Phosphorylation
- Disease Models, Animal
- STAT3 Transcription Factor/metabolism
- Case-Control Studies
- Mice, Inbred C57BL
- Familial Primary Pulmonary Hypertension/metabolism
- Familial Primary Pulmonary Hypertension/physiopathology
- Familial Primary Pulmonary Hypertension/pathology
- Familial Primary Pulmonary Hypertension/genetics
- Female
- ErbB Receptors/metabolism
- Middle Aged
- Vascular Remodeling
- Adult
- Muscle, Smooth, Vascular/metabolism
- Muscle, Smooth, Vascular/pathology
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Affiliation(s)
- Beate Christiane Schlueter
- Justus-Liebig-University Giessen (JLU), Aulweg 130, Giessen 35392, Germany; Universities of Giessen and Marburg Lung Center (UGMLC), Giessen 35392, Germany; Cardio-Pulmonary Institute (CPI), EXC 2026, Project ID: 390649896, Giessen 35392, Germany; Member of the German Center for Lung Research (DZL), Giessen 35392, Germany
| | - Karin Quanz
- Justus-Liebig-University Giessen (JLU), Aulweg 130, Giessen 35392, Germany; Universities of Giessen and Marburg Lung Center (UGMLC), Giessen 35392, Germany; Cardio-Pulmonary Institute (CPI), EXC 2026, Project ID: 390649896, Giessen 35392, Germany; Member of the German Center for Lung Research (DZL), Giessen 35392, Germany
| | - Julia Baldauf
- Justus-Liebig-University Giessen (JLU), Aulweg 130, Giessen 35392, Germany; Universities of Giessen and Marburg Lung Center (UGMLC), Giessen 35392, Germany; Cardio-Pulmonary Institute (CPI), EXC 2026, Project ID: 390649896, Giessen 35392, Germany; Member of the German Center for Lung Research (DZL), Giessen 35392, Germany
| | - Aleksandar Petrovic
- Justus-Liebig-University Giessen (JLU), Aulweg 130, Giessen 35392, Germany; Universities of Giessen and Marburg Lung Center (UGMLC), Giessen 35392, Germany; Cardio-Pulmonary Institute (CPI), EXC 2026, Project ID: 390649896, Giessen 35392, Germany; Member of the German Center for Lung Research (DZL), Giessen 35392, Germany
| | - Clemens Ruppert
- Justus-Liebig-University Giessen (JLU), Aulweg 130, Giessen 35392, Germany; Universities of Giessen and Marburg Lung Center (UGMLC), Giessen 35392, Germany; Cardio-Pulmonary Institute (CPI), EXC 2026, Project ID: 390649896, Giessen 35392, Germany; Member of the German Center for Lung Research (DZL), Giessen 35392, Germany
| | - Andreas Guenther
- Justus-Liebig-University Giessen (JLU), Aulweg 130, Giessen 35392, Germany; Universities of Giessen and Marburg Lung Center (UGMLC), Giessen 35392, Germany; Cardio-Pulmonary Institute (CPI), EXC 2026, Project ID: 390649896, Giessen 35392, Germany; Member of the German Center for Lung Research (DZL), Giessen 35392, Germany; Agaplesion Lung Clinic Waldhof-Elgershausen, Greifenstein 35753, Germany
| | - Henning Gall
- Justus-Liebig-University Giessen (JLU), Aulweg 130, Giessen 35392, Germany; Universities of Giessen and Marburg Lung Center (UGMLC), Giessen 35392, Germany; Cardio-Pulmonary Institute (CPI), EXC 2026, Project ID: 390649896, Giessen 35392, Germany; Member of the German Center for Lung Research (DZL), Giessen 35392, Germany; University Hospital Giessen and Marburg (UKGM), Giessen 35392, Germany
| | - Khodr Tello
- Justus-Liebig-University Giessen (JLU), Aulweg 130, Giessen 35392, Germany; Universities of Giessen and Marburg Lung Center (UGMLC), Giessen 35392, Germany; Cardio-Pulmonary Institute (CPI), EXC 2026, Project ID: 390649896, Giessen 35392, Germany; Member of the German Center for Lung Research (DZL), Giessen 35392, Germany; University Hospital Giessen and Marburg (UKGM), Giessen 35392, Germany
| | - Friedrich Grimminger
- Justus-Liebig-University Giessen (JLU), Aulweg 130, Giessen 35392, Germany; Universities of Giessen and Marburg Lung Center (UGMLC), Giessen 35392, Germany; Cardio-Pulmonary Institute (CPI), EXC 2026, Project ID: 390649896, Giessen 35392, Germany; Member of the German Center for Lung Research (DZL), Giessen 35392, Germany; University Hospital Giessen and Marburg (UKGM), Giessen 35392, Germany
| | - Hossein-Ardeschir Ghofrani
- Justus-Liebig-University Giessen (JLU), Aulweg 130, Giessen 35392, Germany; Universities of Giessen and Marburg Lung Center (UGMLC), Giessen 35392, Germany; Cardio-Pulmonary Institute (CPI), EXC 2026, Project ID: 390649896, Giessen 35392, Germany; Member of the German Center for Lung Research (DZL), Giessen 35392, Germany; University Hospital Giessen and Marburg (UKGM), Giessen 35392, Germany
| | - Norbert Weissmann
- Justus-Liebig-University Giessen (JLU), Aulweg 130, Giessen 35392, Germany; Universities of Giessen and Marburg Lung Center (UGMLC), Giessen 35392, Germany; Cardio-Pulmonary Institute (CPI), EXC 2026, Project ID: 390649896, Giessen 35392, Germany; Member of the German Center for Lung Research (DZL), Giessen 35392, Germany
| | - Werner Seeger
- Justus-Liebig-University Giessen (JLU), Aulweg 130, Giessen 35392, Germany; Universities of Giessen and Marburg Lung Center (UGMLC), Giessen 35392, Germany; Cardio-Pulmonary Institute (CPI), EXC 2026, Project ID: 390649896, Giessen 35392, Germany; Member of the German Center for Lung Research (DZL), Giessen 35392, Germany; Max Planck Institute (MPI) for Heart and Lung Research, Parkstrasse 1, Bad Nauheim 61231, Germany; University Hospital Giessen and Marburg (UKGM), Giessen 35392, Germany
| | - Ralph Theo Schermuly
- Justus-Liebig-University Giessen (JLU), Aulweg 130, Giessen 35392, Germany; Universities of Giessen and Marburg Lung Center (UGMLC), Giessen 35392, Germany; Cardio-Pulmonary Institute (CPI), EXC 2026, Project ID: 390649896, Giessen 35392, Germany; Member of the German Center for Lung Research (DZL), Giessen 35392, Germany
| | - Astrid Weiss
- Justus-Liebig-University Giessen (JLU), Aulweg 130, Giessen 35392, Germany; Universities of Giessen and Marburg Lung Center (UGMLC), Giessen 35392, Germany; Cardio-Pulmonary Institute (CPI), EXC 2026, Project ID: 390649896, Giessen 35392, Germany; Member of the German Center for Lung Research (DZL), Giessen 35392, Germany.
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Werner H. The IGF1 Signaling Pathway: From Basic Concepts to Therapeutic Opportunities. Int J Mol Sci 2023; 24:14882. [PMID: 37834331 PMCID: PMC10573540 DOI: 10.3390/ijms241914882] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2023] [Revised: 10/02/2023] [Accepted: 10/02/2023] [Indexed: 10/15/2023] Open
Abstract
Insulin-like growth factor 1 (IGF1) is a peptide growth factor with important functions in multiple aspects of growth, development and metabolism. The biological actions of IGF1 are mediated by the IGF1 receptor (IGF1R), a cell-surface protein that is evolutionarily related to the insulin receptor (InsR). The effects of IGF1 are moderated by a group of binding proteins (IGFBPs) that bind and transport the ligand in the circulation and extracellular fluids. In mechanistic terms, IGF1R function is linked to the MAPK and PI3K signaling pathways. Furthermore, IGF1R has been shown to migrate to cell nucleus, where it functions as a transcriptional activator. The co-localization of IGF1R and MAPK in the nucleus is of major interest as it suggests novel mechanistic paradigms for the IGF1R-MAPK network. Given its potent anti-apoptotic and pro-survival roles, and in view of its almost universal pattern of expression in most types of cancer, IGF1R has emerged as a promising molecular target in oncology. The present review article provides a concise overview of key scientific developments in the research area of IGF and highlights a number of more recent findings, including its nuclear migration and its interaction with oncogenes and tumor suppressors.
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Affiliation(s)
- Haim Werner
- Department of Human Molecular Genetics and Biochemistry, School of Medicine, Tel Aviv University, Tel Aviv 69978, Israel
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3
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Arimoto M, Izutsu A, Hara A, Shimizu M. Evaluation of binding capacity of circulating insulin-like growth factor binding protein-1b in salmonids using a ligand immunofunctional assay. Comp Biochem Physiol A Mol Integr Physiol 2023; 284:111488. [PMID: 37423420 DOI: 10.1016/j.cbpa.2023.111488] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2023] [Revised: 06/22/2023] [Accepted: 07/06/2023] [Indexed: 07/11/2023]
Abstract
Insulin-like growth factor-binding proteins (IGFBPs) regulate the activity of insulin-like growth factor (IGF)-1. Among the three major circulating IGFBPs in salmonids, IGFBP-1b is an inhibitor of IGF activity induced under catabolic conditions. IGFBP-1b is considered to quickly sequester IGF-1 from the circulation. However, the level of circulating IGFBP-1b present in its unoccupied free form is unknown. Here, we aimed to develop a non-equilibrium ligand immunofunctional assay (LIFA) to evaluate IGF-binding capacity of circulating intact IGFBP-1b. Purified Chinook salmon IGFBP-1b, its antiserum, and europium-labeled salmon IGF-1 were used as the assay components. In the LIFA, IGFBP-1b was first captured by the antiserum, allowed to bind to the labeled IGF-1 for 22 h at 4 °C, and quantified its IGF-binding capacity. Serial dilutions of the standard and serum were prepared simultaneously within a certain concentration range (1.1-12.5 ng/ml). In underyearling masu salmon, IGF-binding capacity of intact IGFBP-1b was higher in fasted fish than in fed fish. Transferring Chinook salmon parr to seawater also increased IGF-binding capacity of IGFBP-1b, most likely due to osmotic stress. In addition, there was a strong relationship between total IGFBP-1b levels and its IGF-binding capacity. These results suggest that IGFBP-1b expressed under stress is mostly present in the free form. On the contrary, during smoltification of masu salmon, IGF-binding capacity of IGFBP-1b in the serum was relatively low and less related to the total IGFBP-1b level, suggesting its functional difference under certain physiological conditions. These results indicate that estimating both total IGFBP-1b level and its IGF-binding capacity is useful for evaluating the catabolic status and unraveling the regulation of IGF-1 activity by IGFBP-1b.
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Affiliation(s)
- Momoka Arimoto
- Graduate School of Fisheries Sciences, Hokkaido University, 3-1-1 Minato, Hakodate, Hokkaido 041-8611, Japan
| | - Ayaka Izutsu
- Graduate School of Environmental Science, Hokkaido University, Kita 10, Nishi 5, Kita-ku, Sapporo, Hokkaido 060-0810, Japan
| | - Akihiko Hara
- Faculty of Fisheries Sciences, Hokkaido University, 3-1-1 Minato, Hakodate, Hokkaido 041-8611, Japan
| | - Munetaka Shimizu
- Field Science Center for Northern Biosphere, Hokkaido University, 3-1-1 Minato, Hakodate, Hokkaido 041-8611, Japan.
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Fernández-Foren A, Sosa C, Abecia JA, Meneses C, Meikle A. Metabolic memory determines oviductal gene expression of underfed ewes during early gestation. Theriogenology 2023; 198:123-130. [PMID: 36584633 DOI: 10.1016/j.theriogenology.2022.12.032] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Revised: 12/21/2022] [Accepted: 12/22/2022] [Indexed: 12/25/2022]
Abstract
Our aim was to investigate the oviduct environment by studying oviduct gene expression after undernutrition in day-5 pregnant ewes with different initial (i) BCS, and its association with the number of embryos recovered. Thirty-six ewes were divided into 2 groups with different iBCS: iBCS ≥2.75 (n = 19; high, H) and iBCS ≤2.25 (n = 17; low, L), and were randomly assigned to two nutritional treatments for 20 days: 1.5 (control, C) or 0.5 (underfed, U) times the daily maintenance requirements. Thus, the final four groups were: high-iBCS control (HC, n = 9), high-iBCS underfed (HU, n = 10), low-iBCS control (LC, n = 9) and low-iBCS underfed (LU, n = 8). Samples of oviduct were collected and the expression of target genes was quantified using real-time PCR. While high-iBCS control ewes presented more ADIPOR1 mRNA than the high-iBCS underfed group (P < 0.05) and low-iBCS control ewes (P = 0.01), high-iBCS underfed group presented higher ADIPOR2 gene expression than low-iBCS underfed ewes (P < 0.01) evidencing a differential oviductal gene expression for these receptors. In high-iBCS ewes, control animals presented higher IGFBP2 gene expression than underfed ewes (P < 0.05), associated these results with a poor oviductal environment. High-iBCS underfed ewes presented higher IGFBP4 gene expression than high-iBCS control ewes (P < 0.05). Stepwise regression models, using various combinations of data on metabolic and reproductive hormones, and oviduct gene expression as independent variables, identified a set of variables that accounted for 75% of the variation in the number of embryos recovered. In conclusion, the oviductal gene expression depends on body reserves and nutritional treatment, and the effect is gene-specific.
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Affiliation(s)
- A Fernández-Foren
- Laboratorio de Endocrinología y Metabolismo Animal, Facultad de Veterinaria, Universidad de la República, Ruta 8, Km. 18, intersección Ruta 102, CP, 13000, Montevideo, Uruguay.
| | - C Sosa
- Departamento de Bioquímica y Biología Molecular y Celular, Universidad de Zaragoza, Miguel Servet, 177, Zaragoza, 50013, Spain
| | - J A Abecia
- Instituto de Investigación en Ciencias Ambientales (IUCA), Universidad de Zaragoza, Miguel Servet, 177, Zaragoza, 50013, Spain
| | - C Meneses
- Laboratorio de Endocrinología y Metabolismo Animal, Facultad de Veterinaria, Universidad de la República, Ruta 8, Km. 18, intersección Ruta 102, CP, 13000, Montevideo, Uruguay
| | - A Meikle
- Laboratorio de Endocrinología y Metabolismo Animal, Facultad de Veterinaria, Universidad de la República, Ruta 8, Km. 18, intersección Ruta 102, CP, 13000, Montevideo, Uruguay
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Dya GA, Klychnikov OI, Adasheva DA, Vladychenskaya EA, Katrukha AG, Serebryanaya DV. IGF-Binding Proteins and Their Proteolysis as a Mechanism of Regulated IGF Release in the Nervous Tissue. BIOCHEMISTRY (MOSCOW) 2023; 88:S105-S122. [PMID: 37069117 DOI: 10.1134/s0006297923140079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/22/2023]
Abstract
Insulin-like growth factors 1 and 2 (IGF-1 and IGF-2) play a key role in the maintenance of the nervous tissue viability. IGF-1 and IGF-2 exhibit the neuroprotective effects by stimulating migration and proliferation of nervous cells, activating cellular metabolism, inducing regeneration of damaged cells, and regulating various stages of prenatal and postnatal development of the nervous system. The availability of IGFs for the cells is controlled via their interaction with the IGF-binding proteins (IGFBPs) that inhibit their activity. On the contrary, the cleavage of IGFBPs by specific proteases leads to the IGF release and activation of its cellular effects. The viability of neurons in the nervous tissue is controlled by a complex system of trophic factors secreted by auxiliary glial cells. The main source of IGF for the neurons are astrocytes. IGFs can accumulate as an extracellular free ligand near the neuronal membranes as a result of proteolytic degradation of IGFBPs by proteases secreted by astrocytes. This mechanism promotes interaction of IGFs with their genuine receptors and triggers intracellular signaling cascades. Therefore, the release of IGF by proteolytic cleavage of IGFBPs is an important mechanism of neuronal protection. This review summarizes the published data on the role of IGFs and IGFBPs as the key players in the neuroprotective regulation with a special focus on the specific proteolysis of IGFBPs as a mechanism for the regulation of IGF bioavailability and viability of neurons.
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Affiliation(s)
- German A Dya
- Department of Biochemistry, Faculty of Biology, Lomonosov Moscow State University, Moscow, 119991, Russia
| | - Oleg I Klychnikov
- Department of Biochemistry, Faculty of Biology, Lomonosov Moscow State University, Moscow, 119991, Russia
| | - Daria A Adasheva
- Department of Biochemistry, Faculty of Biology, Lomonosov Moscow State University, Moscow, 119991, Russia
| | - Elizaveta A Vladychenskaya
- Department of Biochemistry, Faculty of Biology, Lomonosov Moscow State University, Moscow, 119991, Russia
| | - Alexey G Katrukha
- Department of Biochemistry, Faculty of Biology, Lomonosov Moscow State University, Moscow, 119991, Russia
| | - Daria V Serebryanaya
- Department of Biochemistry, Faculty of Biology, Lomonosov Moscow State University, Moscow, 119991, Russia.
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Liu M, Yan W, Chen D, Luo J, Dai L, Chen H, Chen KN. IGFBP1 hiWNT3A lo Subtype in Esophageal Cancer Predicts Response and Prolonged Survival with PD-(L)1 Inhibitor. BIOLOGY 2022; 11:biology11111575. [PMID: 36358276 PMCID: PMC9687176 DOI: 10.3390/biology11111575] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Revised: 10/19/2022] [Accepted: 10/21/2022] [Indexed: 01/25/2023]
Abstract
PD-(L)1 inhibitor could improve the survival of locally advanced esophageal cancer (ESCA) patients, but we cannot tailor the treatment to common biomarkers. WNT signaling activation was associated with primary resistance to immunotherapy. In this study, we used our two clinical cohorts (BJCH n = 95, BJIM n = 21) and three public cohorts to evaluate and verify a new immunotherapeutic biomarker based on WNT signaling in ESCA patients. Our findings showed that WNT signaling-related genes stratified TCGA patients into Cluster 1, 2, and 3, among which, Cluster 3 had the worst prognosis. The most up- and down-regulated genes in Cluster 3 were IGFBP1 and WNT3A. Further analysis validated that IGFBP1hiWNT3Alo ESCA patients had significantly poor RFS and OS in the TCGA and BJCH cohorts. Interestingly, IGFBP1hiWNT3Alo patients had a good response and prognosis with immunotherapy in three independent cohorts, exhibiting better predictive value than PD-L1 expression (signature AUC = 0.750; PD-L1 AUC = 0.571). Moreover, IGFBP1hiWNT3Alo patients may benefit more from immunotherapy than standard treatment (p = 0.026). Immune cell infiltration analysis revealed a significant increase in DC infiltration in IGFBP1hiWNT3Alo patients post-immunotherapy (p = 0.022), which may enhance immune response. The IGFBP1hiWNT3Alo signature could predict patients who benefited from PD-(L)1 inhibitor treatment and may serve as a biomarker in ESCA.
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Affiliation(s)
- Meichen Liu
- Department of Thoracic Surgery I, Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Peking University Cancer Hospital & Institute, No. 52, Fucheng Road, Haidian District, Beijing 100142, China
| | - Wanpu Yan
- Department of Thoracic Surgery I, Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Peking University Cancer Hospital & Institute, No. 52, Fucheng Road, Haidian District, Beijing 100142, China
| | - Dongbo Chen
- Peking University People’s Hospital, Peking University Hepatology Institute, Beijing Key Laboratory of Hepatitis C and Immunotherapy for Liver Disease, No.11 Xizhimen South Street, Xicheng District, Beijing 100044, China
| | - Jiancheng Luo
- Aiyi Technology Co., Ltd., Room 1004, Building 3, Greenland Qihang, Biomedical Industry Base, Daxing District, Beijing 102629, China
| | - Liang Dai
- Department of Thoracic Surgery I, Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Peking University Cancer Hospital & Institute, No. 52, Fucheng Road, Haidian District, Beijing 100142, China
| | - Hongsong Chen
- Peking University People’s Hospital, Peking University Hepatology Institute, Beijing Key Laboratory of Hepatitis C and Immunotherapy for Liver Disease, No.11 Xizhimen South Street, Xicheng District, Beijing 100044, China
- Correspondence: (H.C.); (K.-N.C.)
| | - Ke-Neng Chen
- Department of Thoracic Surgery I, Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Peking University Cancer Hospital & Institute, No. 52, Fucheng Road, Haidian District, Beijing 100142, China
- Correspondence: (H.C.); (K.-N.C.)
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7
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Graña-Baumgartner A, Meikle A, Fernández-Foren A, Neimaur K, Barrera N, Cuadro F, Santos-Neto PCD, Bosolasco D, Núñez-Olivera R, Crispo M, Menchaca A, de Brun V. Local influence of the corpus luteum on the ipsilateral oviduct and early embryo development in the ewe. Theriogenology 2020; 151:7-15. [DOI: 10.1016/j.theriogenology.2020.03.028] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2019] [Revised: 03/11/2020] [Accepted: 03/23/2020] [Indexed: 12/17/2022]
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8
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Growth factor gene IGF1 is associated with bill size in the black-bellied seedcracker Pyrenestes ostrinus. Nat Commun 2018; 9:4855. [PMID: 30451848 PMCID: PMC6242981 DOI: 10.1038/s41467-018-07374-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2018] [Accepted: 10/25/2018] [Indexed: 01/08/2023] Open
Abstract
Pyrenestes finches are unique among birds in showing a non-sex-determined polymorphism in bill size and are considered a textbook example of disruptive selection. Morphs breed randomly with respect to bill size, and differ in diet and feeding performance relative to seed hardness. Previous breeding experiments are consistent with the polymorphism being controlled by a single genetic factor. Here, we use genome-wide pooled sequencing to explore the underlying genetic basis of bill morphology and identify a single candidate region. Targeted resequencing reveals extensive linkage disequilibrium across a 300 Kb region containing the insulin-like growth factor 1 (IGF1) gene, with a single 5-million-year-old haplotype associating with phenotypic dominance of the large-billed morph. We find no genetic similarities controlling bill size in the well-studied Darwin’s finches (Geospiza). Our results show how a single genetic factor may control bill size and provide a foundation for future studies to examine this phenomenon within and among avian species. Pyrenestes finches have a bill size polymorphism thought to be maintained by disruptive selection. Here, the authors identify a single candidate region, including insulin-like growth factor 1, differentiating small and large bill size morphs and a wider region differentiating the mega-billed morph.
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Jafari E, Gheysarzadeh A, Mahnam K, Shahmohammadi R, Ansari A, Bakhtyari H, Mofid MR. In silico interaction of insulin-like growth factor binding protein 3 with insulin-like growth factor 1. Res Pharm Sci 2018; 13:332-342. [PMID: 30065766 PMCID: PMC6040160 DOI: 10.4103/1735-5362.235160] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Insulin-like growth factor binding protein-3 (IGFBP-3) is a vital protein exist in circulation which interacts with high affinity to insulin-like growth factor (IGFs) altering their activities. Therefore, the interaction between IGFs and IGFBP-3 has a key role altering large spectrum of activities such as cell cycle progression, proliferation and apoptosis. Despite decades of research, the crystal structure of IGFBP-3 has not been identified possibly due to some technical challenge in its crystallizing. The three-dimensional (3D) structure of IGFBP-3 was predicted using homology modeling, Phyre2, and molecular dynamic. Its interaction with IGF-1 was also identified by HADDOCK software. IGFBP-3 has the most identity with other IGFBPs in N and C-domain; however, its linker domain has lower identity. Our data predicted that IGF-1 structurally interacts with N-domain and linker domain of IGFBP-3. Some conserved residues of IGFBP-3 such as Glu33, Arg36, Gly39, Arg60, Arg66, Asn109, and Ile146 interacts with Glu3, Asp12, Phe16, Gly19, Asp20, Arg21, and Glu58 of IGF-1. In addition, our data predict that the linker domain has a loop structure which covers post translational modification and interacts with IGF-1. The phosphorylation of Ser111 in linker domain, which previously has been shown to induce apoptosis make a repulsive force interrupting this interaction to IGF-1, which enables IGFBP-3 to induce apoptosis. The present study suggests that the linker domain has a key role in recognition of IGFBP-3 with IGF-1.
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Affiliation(s)
- Elham Jafari
- Department of Medicinal Chemistry, Bioinformatics Research Center, School of Pharmacy and Pharmaceutical Sciences, Isfahan University of Medical Sciences, Isfahan, I.R. Iran
| | - Ali Gheysarzadeh
- Department of Biochemistry and Bioinformatics Research Center, School of Pharmacy and Pharmaceutical Sciences, Isfahan University of Medical Sciences, Isfahan, I.R. Iran
| | - Karim Mahnam
- Biology Department, Faculty of Sciences, Shahrekord University, Shahrekord, I.R. Iran
| | | | - Amir Ansari
- Department of Biochemistry and Bioinformatics Research Center, School of Pharmacy and Pharmaceutical Sciences, Isfahan University of Medical Sciences, Isfahan, I.R. Iran
| | - Hadi Bakhtyari
- Department of Biochemistry and Bioinformatics Research Center, School of Pharmacy and Pharmaceutical Sciences, Isfahan University of Medical Sciences, Isfahan, I.R. Iran
| | - Mohammad Reza Mofid
- Department of Biochemistry and Bioinformatics Research Center, School of Pharmacy and Pharmaceutical Sciences, Isfahan University of Medical Sciences, Isfahan, I.R. Iran
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10
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Abstract
Insulin-like growth factor-binding proteins (IGFBPs) 1-6 bind IGFs but not insulin with high affinity. They were initially identified as serum carriers and passive inhibitors of IGF actions. However, subsequent studies showed that, although IGFBPs inhibit IGF actions in many circumstances, they may also potentiate these actions. IGFBPs are widely expressed in most tissues, and they are flexible endocrine and autocrine/paracrine regulators of IGF activity, which is essential for this important physiological system. More recently, individual IGFBPs have been shown to have IGF-independent actions. Mechanisms underlying these actions include (i) interaction with non-IGF proteins in compartments including the extracellular space and matrix, the cell surface and intracellular space, (ii) interaction with and modulation of other growth factor pathways including EGF, TGF-β and VEGF, and (iii) direct or indirect transcriptional effects following nuclear entry of IGFBPs. Through these IGF-dependent and IGF-independent actions, IGFBPs modulate essential cellular processes including proliferation, survival, migration, senescence, autophagy and angiogenesis. They have been implicated in a range of disorders including malignant, metabolic, neurological and immune diseases. A more complete understanding of their cellular roles may lead to the development of novel IGFBP-based therapeutic opportunities.
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Affiliation(s)
- L A Bach
- Department of Medicine (Alfred)Monash University, Melbourne, Australia
- Department of Endocrinology and DiabetesAlfred Hospital, Melbourne, Australia
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11
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Abstract
Insulinlike growth factor (IGF) binding proteins (IGFBPs) 1 to 6 are high-affinity regulators of IGF activity. They generally inhibit IGF actions by preventing binding to the IGF-I receptor but can also enhance their actions under some conditions. Posttranslational modifications such as glycosylation and phosphorylation modulate IGFBP properties, and IGFBP proteolysis results in IGF release. IGFBPs have more recently been shown to have IGF-independent actions. A number of mechanisms are involved, including modulation of other growth factor pathways, nuclear localization and transcriptional regulation, interaction with the sphingolipid pathway, and binding to non-IGF biomolecules in the extracellular space and matrix, on the cell surface and intracellularly. IGFBPs modulate important biological processes, including cell proliferation, survival, migration, senescence, autophagy, and angiogenesis. Their actions have been implicated in growth, metabolism, cancer, stem cell maintenance and differentiation, and immune regulation. Recent studies have shown that epigenetic mechanisms are involved in the regulation of IGFBP abundance. A more complete understanding of IGFBP biology is necessary to further define their cellular roles and determine their therapeutic potential.
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Affiliation(s)
- Leon A Bach
- Department of Endocrinology and Diabetes, The Alfred Hospital, Melbourne, Victoria, Australia
- Department of Medicine, Alfred Medical Research and Education Precinct, Monash University, Melbourne, Victoria, Australia
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12
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Rankin AM, Galbreath KE, Teeter KC. Signatures of adaptive molecular evolution in American pikas (Ochotona princeps). J Mammal 2017. [DOI: 10.1093/jmammal/gyx059] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
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13
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Lee HS, Park YS, Lee JS, Seo JT. Serum and seminal plasma insulin-like growth factor-1 in male infertility. Clin Exp Reprod Med 2016; 43:97-101. [PMID: 27358827 PMCID: PMC4925873 DOI: 10.5653/cerm.2016.43.2.97] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2016] [Revised: 03/24/2016] [Accepted: 04/16/2016] [Indexed: 11/06/2022] Open
Abstract
OBJECTIVE Growth hormone and its mediator, insulin-like growth factor-1 (IGF-1), have been suggested to exert gonadotropic actions in both humans and animals. The present study was conducted to assess the relationship between serum IGF-1 concentration, seminal plasma concentration, and sperm parameter abnormalities. METHODS A total of 79 men were enrolled in this study from December 2011 to July 2012 and were prospectively analyzed. Patient parameters analyzed included age, body mass index, smoking status, urological history, and fertility history. Patients were divided into four groups based on their semen parameters: normal (A, n=31), abnormal sperm motility (B, n=12), abnormal sperm morphology (C, n=20), and two or more abnormal parameters (D, n=16). Patient seminal plasma and serum IGF-1 concentrations were determined. RESULTS Patient baseline characteristics were not significantly different between any of the groups. The serum IGF-1 levels in groups B, C, and D were significantly lower than the levels in group A; however, the seminal plasma IGF-1 levels were not significantly different between any of the groups. CONCLUSION Men with abnormal sperm parameters had significantly lower levels of serum IGF-1 compared with men with normal sperm parameters. Seminal plasma IGF-1 levels, however, did not differ significantly between the groups investigated here. Further investigations will be required to determine the exact mechanisms by which growth hormone and IGF-1 affect sperm quality.
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Affiliation(s)
- Hyo Serk Lee
- Department of Urology, Cheil General Hospital and Women's Healthcare Center, Dankook University College of Medicine, Seoul, Korea
| | - Yong-Seog Park
- Laboratory of Reproductive Biology and Infertility, Cheil General Hospital and Women's Healthcare Center, Dankook University College of Medicine, Seoul, Korea
| | - Joong Shik Lee
- Department of Urology, Cheil General Hospital and Women's Healthcare Center, Dankook University College of Medicine, Seoul, Korea
| | - Ju Tae Seo
- Department of Urology, Cheil General Hospital and Women's Healthcare Center, Dankook University College of Medicine, Seoul, Korea
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14
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Sharma A, Purohit S, Sharma S, Bai S, Zhi W, Ponny SR, Hopkins D, Steed L, Bode B, Anderson SW, She JX. IGF-Binding Proteins in Type-1 Diabetes Are More Severely Altered in the Presence of Complications. Front Endocrinol (Lausanne) 2016; 7:2. [PMID: 26858687 PMCID: PMC4731488 DOI: 10.3389/fendo.2016.00002] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/04/2015] [Accepted: 01/12/2016] [Indexed: 12/29/2022] Open
Abstract
AIMS Reduced levels of free and total insulin-like growth factor 1 (IGF-I) have been observed in type-1 diabetes (T1D) patients. The bioavailability of IGF-I from the circulation to the target cells is controlled by multifunctional IGF-binding proteins (IGFBPs). The aim of this study was to profile serum IGFBPs in T1D and its complications. DESIGN We measured the IGFBP levels in 3662 patient serum samples from our ongoing Phenome and Genome of Diabetes Autoimmunity (PAGODA) study. IGFBP levels of four different groups of T1D patients (with 0, 1, 2, and ≥3 complications) were compared with healthy controls. RESULTS Three serum IGFBPs (IGFBP-1, -2, and -6) are significantly higher in T1D patients, and these alterations are greater in the presence of diabetic complications. IGFBP-3 is lower in patients with diabetic complications. Analyses using quintiles revealed that risk of T1D complications increases with increasing concentrations of IGFBP-2 (fifth quintile ORs: 18-60, p < 10(-26)), IGFBP-1 (fifth quintile ORs: 8-20, p < 10(-15)), and IGFBP-6 (fifth quintile ORs: 3-148, p < 10(-3)). IGFBP-3 has a negative association with T1D complications (fifth quintile ORs: 0.12-0.25, p < 10(-5)). CONCLUSION We found that elevated serum levels of IGFBP-1, -2, and -6 were associated with T1D, and its complications and IGFBP-3 level was found to be decreased in T1D with complications. Given the known role of these IGFBPs, the overall impact of these alterations suggests a negative effect on IGF signaling.
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Affiliation(s)
- Ashok Sharma
- Center for Biotechnology and Genomic Medicine, Augusta University, Augusta, GA, USA
- Department of Biostatistics and Epidemiology, Augusta University, Augusta, GA, USA
- *Correspondence: Ashok Sharma,
| | - Sharad Purohit
- Center for Biotechnology and Genomic Medicine, Augusta University, Augusta, GA, USA
- Department of Pathology, Augusta University, Augusta, GA, USA
| | - Shruti Sharma
- Center for Biotechnology and Genomic Medicine, Augusta University, Augusta, GA, USA
| | - Shan Bai
- Center for Biotechnology and Genomic Medicine, Augusta University, Augusta, GA, USA
| | - Wenbo Zhi
- Center for Biotechnology and Genomic Medicine, Augusta University, Augusta, GA, USA
| | - Sithara Raju Ponny
- Center for Biotechnology and Genomic Medicine, Augusta University, Augusta, GA, USA
| | - Diane Hopkins
- Center for Biotechnology and Genomic Medicine, Augusta University, Augusta, GA, USA
| | - Leigh Steed
- Center for Biotechnology and Genomic Medicine, Augusta University, Augusta, GA, USA
| | - Bruce Bode
- Pediatric Endocrine Associates, Atlanta, GA, USA
| | | | - Jin-Xiong She
- Center for Biotechnology and Genomic Medicine, Augusta University, Augusta, GA, USA
- Department of Pathology, Augusta University, Augusta, GA, USA
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15
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Schultz I, Wurzel J, Meinel L. Drug delivery of Insulin-like growth factor I. Eur J Pharm Biopharm 2015; 97:329-37. [DOI: 10.1016/j.ejpb.2015.04.026] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2015] [Revised: 04/15/2015] [Accepted: 04/22/2015] [Indexed: 12/20/2022]
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16
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Singh J, Paul A, Thakur N, Yadav V, Panda R, Bhure S, Sarkar M. Localization of IGF proteins in various stages of ovarian follicular development and modulatory role of IGF-I on granulosa cell steroid production in water buffalo (Bubalus bubalis). Anim Reprod Sci 2015; 158:31-52. [DOI: 10.1016/j.anireprosci.2015.04.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2014] [Revised: 04/15/2015] [Accepted: 04/17/2015] [Indexed: 10/23/2022]
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17
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Musumeci G, Castrogiovanni P, Coleman R, Szychlinska MA, Salvatorelli L, Parenti R, Magro G, Imbesi R. Somitogenesis: From somite to skeletal muscle. Acta Histochem 2015; 117:313-28. [PMID: 25850375 DOI: 10.1016/j.acthis.2015.02.011] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2014] [Revised: 01/31/2015] [Accepted: 02/08/2015] [Indexed: 12/21/2022]
Abstract
Myogenesis is controlled by an elaborate system of extrinsic and intrinsic regulatory mechanisms in all development stages. The aim of this review is to provide an overview of the different stages of myogenesis and muscle differentiation in mammals, starting from somitogenesis and analysis of the different portions that constitute the mature somite. Particular attention was paid to regulatory genes, in addition to mesodermal stem cells, which represent the earliest elements of myogenesis. Finally, the crucial role of growth factors, molecules of vital importance in contractile regulation, hormones and their function in skeletal muscle differentiation, growth and metabolism, and the role played by central nervous system, are discussed.
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Affiliation(s)
- Giuseppe Musumeci
- Department of Biomedical and Biotechnological Sciences, Human Anatomy and Histology Section, School of Medicine, University of Catania, Catania, Italy.
| | - Paola Castrogiovanni
- Department of Biomedical and Biotechnological Sciences, Human Anatomy and Histology Section, School of Medicine, University of Catania, Catania, Italy
| | - Raymond Coleman
- Department of Anatomy and Cell Biology, Rappaport Faculty of Medicine, Technion-Israel Institute of Technology, Haifa, Israel
| | - Marta Anna Szychlinska
- Department of Biomedical and Biotechnological Sciences, Human Anatomy and Histology Section, School of Medicine, University of Catania, Catania, Italy
| | - Lucia Salvatorelli
- Department of Anatomy and Cell Biology, Rappaport Faculty of Medicine, Technion-Israel Institute of Technology, Haifa, Israel
| | - Rosalba Parenti
- Department of Biomedical and Biotechnological Sciences, Section of Physiology, School of Medicine, University of Catania, Catania, Italy
| | - Gaetano Magro
- Department of Medical and Surgical Sciences and Advanced Technologies, G.F. Ingrassia, Azienda Ospedaliero-Universitaria "Policlinico-Vittorio Emanuele", Anatomic Pathology Section, University of Catania, Catania, Italy
| | - Rosa Imbesi
- Department of Biomedical and Biotechnological Sciences, Human Anatomy and Histology Section, School of Medicine, University of Catania, Catania, Italy
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18
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Wang N, Rayes RF, Elahi SM, Lu Y, Hancock MA, Massie B, Rowe GE, Aomari H, Hossain S, Durocher Y, Pinard M, Tabariès S, Siegel PM, Brodt P. The IGF-Trap: Novel Inhibitor of Carcinoma Growth and Metastasis. Mol Cancer Ther 2015; 14:982-93. [PMID: 25673819 DOI: 10.1158/1535-7163.mct-14-0751] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2014] [Accepted: 02/01/2015] [Indexed: 11/16/2022]
Abstract
The IGFI receptor promotes malignant progression and has been recognized as a target for cancer therapy. Clinical trials with anti-IGFIR antibodies provided evidence of therapeutic efficacy but exposed limitations due in part to effects on, and the compensatory function of, the insulin receptor system. Here, we report on the production, characterization, and biologic activity of a novel, IGF-targeting protein (the IGF-Trap) comprising a soluble form of hIGFIR and the Fc portion of hIgG1. The IGF-Trap has a high affinity for hIGFI and hIGFII but low affinity for insulin, as revealed by surface plasmon resonance. It efficiently blocked IGFIR signaling in several carcinoma cell types and inhibited tumor cell proliferation, migration, and invasion in vitro. In vivo, the IGF-Trap showed favorable pharmacokinetic properties and could suppress the growth of established breast carcinoma tumors when administered therapeutically into tumor-bearing mice, improving disease-free survival. Moreover, IGF-Trap treatment markedly reduced experimental liver metastasis of colon and lung carcinoma cells, increasing tumor cell apoptosis and reducing angiogenesis. Finally, when compared with an anti-IGFIR antibody or IGF-binding protein-1 that were used at similar or higher concentrations, the IGF-Trap showed superior therapeutic efficacy to both inhibitors. Taken together, we have developed a targeted therapeutic molecule with highly potent anticancer effects that could address limitations of current IGFIR-targeting agents.
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Affiliation(s)
- Ni Wang
- Department of Surgery, McGill University Health Centre, McGill University, Montreal, Québec, Canada
| | - Roni F Rayes
- Department of Surgery, McGill University Health Centre, McGill University, Montreal, Québec, Canada
| | - Seyyed Mehdy Elahi
- Biotechnology Research Institute (National Research Council), Université de Montréal, Montreal, Québec, Canada
| | - Yifan Lu
- Department of Surgery, McGill University Health Centre, McGill University, Montreal, Québec, Canada
| | - Mark A Hancock
- SPR-MS Facility, McGill University, Montreal, Québec, Canada
| | - Bernard Massie
- Biotechnology Research Institute (National Research Council), Université de Montréal, Montreal, Québec, Canada. Department of Microbiology and Immunology, Université de Montréal, Montreal, Québec, Canada
| | - Gerald E Rowe
- Biotechnology Research Institute (National Research Council), Université de Montréal, Montreal, Québec, Canada
| | - Hafida Aomari
- Biotechnology Research Institute (National Research Council), Université de Montréal, Montreal, Québec, Canada
| | - Sazzad Hossain
- Biotechnology Research Institute (National Research Council), Université de Montréal, Montreal, Québec, Canada
| | - Yves Durocher
- Biotechnology Research Institute (National Research Council), Université de Montréal, Montreal, Québec, Canada
| | - Maxime Pinard
- Department of Surgery, McGill University Health Centre, McGill University, Montreal, Québec, Canada
| | - Sébastien Tabariès
- Department of Medicine, McGill University Health Centre, McGill University, Montreal, Québec, Canada. Rosalind and Morris Goodman Cancer Research Centre, McGill University, Montreal, Québec, Canada
| | - Peter M Siegel
- Department of Medicine, McGill University Health Centre, McGill University, Montreal, Québec, Canada. Rosalind and Morris Goodman Cancer Research Centre, McGill University, Montreal, Québec, Canada. Department of Anatomy & Cell Biology, McGill University Health Centre, McGill University, Montreal, Québec, Canada
| | - Pnina Brodt
- Department of Surgery, McGill University Health Centre, McGill University, Montreal, Québec, Canada. Department of Medicine, McGill University Health Centre, McGill University, Montreal, Québec, Canada. Department of Oncology, McGill University Health Centre, McGill University, Montreal, Québec, Canada.
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19
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Elkazaz AY, Salama K. The effect of oral contraceptive different patterns of use on circulating IGF-1 and bone mineral density in healthy premenopausal women. Endocrine 2015; 48:272-8. [PMID: 24861474 DOI: 10.1007/s12020-014-0290-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/09/2013] [Accepted: 05/05/2014] [Indexed: 11/30/2022]
Abstract
Both insulin-like growth factor-1(IGF-1) and oral contraceptive (OC) use have been linked to premenopausal breast and colorectal cancers, osteoporosis and cardiovascular disease. Understanding the effects of different patterns of use of OC on IGF-1 levels and bone mineral density (BMD) may offer insight into its influence on osteoporosis. We conducted a cross-sectional study, which included 135 women, who were then divided into three groups: Group A who were OC current users, 41 women; Group B who never use OC, 51 women; and Group C who were past users of OC, 41 women. Each patient completed a questionnaire on demographic parameters, marital state history and contraception history including duration of use and type of contraceptive pills or used method. Lower-end radius, proximal femur and lumbar spine BMD were measured by dual-energy X-ray absorptiometry. IGF-1 was assessed with chemiluminescent immunometric assay. The three groups were similar in total body T value of BMD (with slight better results in past users than the other two groups but it was statistically insignificant difference), and past users showed significantly higher BMD values compared to current users at spine, femur and forearm. Nonusers also had better BMD values compared to current users (spine and forearm BMD). Among past users, the mean level of circulating IGF-1 was higher than the other two groups and that difference was statistically significant. Past OC use and/or nonuse has a more favorable impact on BMD compared to current use and that this relationship is in part mediated by IGF-1. Hence, it appears that OC use is beneficial to BMD if used in the past and then discontinued or if never used at all compared to current use.
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Affiliation(s)
- Amany Y Elkazaz
- Department of Medical Biochemistry, Faculty of Medicine, Suez Canal University, Ismailia, Egypt,
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20
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Andres SF, Santoro MA, Mah AT, Keku JA, Bortvedt AE, Blue RE, Lund PK. Deletion of intestinal epithelial insulin receptor attenuates high-fat diet-induced elevations in cholesterol and stem, enteroendocrine, and Paneth cell mRNAs. Am J Physiol Gastrointest Liver Physiol 2015; 308:G100-11. [PMID: 25394660 PMCID: PMC4297856 DOI: 10.1152/ajpgi.00287.2014] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
The insulin receptor (IR) regulates nutrient uptake and utilization in multiple organs, but its role in the intestinal epithelium is not defined. This study developed a mouse model with villin-Cre (VC) recombinase-mediated intestinal epithelial cell (IEC)-specific IR deletion (VC-IR(Δ/Δ)) and littermate controls with floxed, but intact, IR (IR(fl/fl)) to define in vivo roles of IEC-IR in mice fed chow or high-fat diet (HFD). We hypothesized that loss of IEC-IR would alter intestinal growth, biomarkers of intestinal epithelial stem cells (IESC) or other lineages, body weight, adiposity, and glucose or lipid handling. In lean, chow-fed mice, IEC-IR deletion did not affect body or fat mass, plasma glucose, or IEC proliferation. In chow-fed VC-IR(Δ/Δ) mice, mRNA levels of the Paneth cell marker lysozyme (Lyz) were decreased, but markers of other differentiated lineages were unchanged. During HFD-induced obesity, IR(fl/fl) and VC-IR(Δ/Δ) mice exhibited similar increases in body and fat mass, plasma insulin, mRNAs encoding several lipid-handling proteins, a decrease in Paneth cell number, and impaired glucose tolerance. In IR(fl/fl) mice, HFD-induced obesity increased circulating cholesterol; numbers of chromogranin A (CHGA)-positive enteroendocrine cells (EEC); and mRNAs encoding Chga, glucose-dependent insulinotrophic peptide (Gip), glucagon (Gcg), Lyz, IESC biomarkers, and the enterocyte cholesterol transporter Scarb1. All these effects were attenuated or lost in VC-IR(Δ/Δ) mice. These results demonstrate that IEC-IR is not required for normal growth of the intestinal epithelium in lean adult mice. However, our findings provide novel evidence that, during HFD-induced obesity, IEC-IR contributes to increases in EEC, plasma cholesterol, and increased expression of Scarb1 or IESC-, EEC-, and Paneth cell-derived mRNAs.
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Affiliation(s)
- Sarah F. Andres
- 1Department of Cell Biology and Physiology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina; and
| | - M. Agostina Santoro
- 1Department of Cell Biology and Physiology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina; and
| | - Amanda T. Mah
- 2Department of Nutrition, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - J. Adeola Keku
- 1Department of Cell Biology and Physiology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina; and
| | - Amy E. Bortvedt
- 1Department of Cell Biology and Physiology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina; and
| | - R. Eric Blue
- 1Department of Cell Biology and Physiology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina; and
| | - P. Kay Lund
- 1Department of Cell Biology and Physiology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina; and
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21
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de Brun V, Meikle A, Casal A, Sequeira M, Contreras-Solís I, Carriquiry M, Forcada F, Sosa C, Abecia J. Periconceptional undernutrition modifies endocrine profiles and hepatic gene expression in sheep. J Anim Physiol Anim Nutr (Berl) 2014; 99:710-8. [DOI: 10.1111/jpn.12261] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2014] [Accepted: 09/02/2014] [Indexed: 12/22/2022]
Affiliation(s)
- V. de Brun
- Laboratorio de Técnicas Nucleares; Facultad de Veterinaria; Montevideo Uruguay
| | - A. Meikle
- Laboratorio de Técnicas Nucleares; Facultad de Veterinaria; Montevideo Uruguay
| | - A. Casal
- Departamento de Producción Animal y Pasturas; Facultad de Agronomía; Montevideo Uruguay
| | - M. Sequeira
- Laboratorio de Técnicas Nucleares; Facultad de Veterinaria; Montevideo Uruguay
| | - I. Contreras-Solís
- Departamento de Producción Animal y Ciencia de los Alimentos; Universidad de Zaragoza; Zaragoza Spain
| | - M. Carriquiry
- Departamento de Producción Animal y Pasturas; Facultad de Agronomía; Montevideo Uruguay
| | - F. Forcada
- Departamento de Producción Animal y Ciencia de los Alimentos; Universidad de Zaragoza; Zaragoza Spain
| | - C. Sosa
- Departamento de Producción Animal y Ciencia de los Alimentos; Universidad de Zaragoza; Zaragoza Spain
| | - J.A. Abecia
- Departamento de Producción Animal y Ciencia de los Alimentos; Universidad de Zaragoza; Zaragoza Spain
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22
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Polymorphisms in genes within the IGF-axis influence antenatal and postnatal growth. J Dev Orig Health Dis 2014; 4:157-69. [PMID: 25054682 DOI: 10.1017/s2040174412000633] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Two pregnancy cohorts were used to investigate the association between single-nucleotide polymorphisms (SNPs) in genes within the insulin-like growth factor (IGF)-axis and antenatal and postnatal growth from birth to adolescence. Longitudinal analyses were conducted in the Raine pregnancy cohort (n = 1162) using repeated measures of fetal head circumference (HC), abdominal circumference (AC) and femur length (FL) from 18 to 38 weeks gestation and eight measures of postnatal height and weight (1-17 years). Replications of significant associations up to birth were undertaken in the Generation R Study (n = 2642). Of the SNPs within the IGF-axis genes, 40% (n = 58) were associated with measures of antenatal growth (P ⩽ 0.05). The majority of these SNPs were in receptors; IGF-1R (23%; n = 34) and IGF-2R (13%; n = 9). Fifteen SNPs were associated with antenatal growth (either AC or HC or FL) in Raine (P ⩽ 0.005): five of which remained significant after adjusting for multiple testing. Four of these replicated in Generation R. Associations were identified between 38% (n = 55) of the IGF-axis SNPs and postnatal height and weight; 21% in IGF-1R (n = 31) and 9% in IGF-2R (n = 13). Twenty-six SNPs were significantly associated with both antenatal and postnatal growth; 17 with discordant effects and nine with concordant effects. Genetic variants in the IGF-axis appear to play a significant role in antenatal and postnatal growth. Further replication and new analytic methods are required in order to better understand this key metabolic pathway integrating biologic knowledge about the interaction between IGF-axis components.
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Kim JW. Modulation of the somatotropic axis in periparturient dairy cows. ASIAN-AUSTRALASIAN JOURNAL OF ANIMAL SCIENCES 2014; 27:147-54. [PMID: 25049937 PMCID: PMC4093282 DOI: 10.5713/ajas.2013.13139] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/05/2013] [Revised: 10/27/2013] [Accepted: 04/22/2013] [Indexed: 02/08/2023]
Abstract
This review focuses on modulation of growth hormone (GH) and its downstream actions on periparturient dairy cows undergoing physiological and metabolic adaptations. During the periparturient period, cows experience a negative energy balance implicating that the feed intake does not meet the total energy demand for the onset of lactation. To regulate this metabolic condition, key hormones of somatotropic axis such as GH, IGF-I and insulin must coordinate adaptations required for the preservation of metabolic homeostasis. The hepatic GHR1A transcript and GHR protein are reduced at parturition, but recovers on postpartum. However, plasma IGF-I concentration remains low even though hepatic abundance of the GHR and IGF-I mRNA return to pre-calving value. This might be caused by alternation in IGFBPs and ALS genes, which consequently affect the plasma IGF-I stability. Plasma insulin level declines in a parallel manner with the decrease in plasma IGF-I after parturition. Increased GH stimulates the lipolytic effects and hepatic glucose synthesis to meet the energy requirement for mammary lactose synthesis, suggesting that GH antagonizes insulin-dependent glucose uptake and attenuates insulin action to decrease gluconeogenesis.
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Affiliation(s)
- Jin Wook Kim
- Department of Animal Bioscience (Insti. of Agric. and Life Sci.), Gyeongsang National University, Jinju 660-701, Korea
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24
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IGFBP-4 anti-angiogenic and anti-tumorigenic effects are associated with anti-cathepsin B activity. Neoplasia 2013; 15:554-67. [PMID: 23633927 DOI: 10.1593/neo.13212] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2013] [Revised: 02/12/2013] [Accepted: 02/15/2013] [Indexed: 11/18/2022] Open
Abstract
Insulin-like growth factor-binding protein 4 (IGFBP-4/IBP-4) has potent IGF-independent anti-angiogenic and antitumorigenic effects. In this study, we demonstrated that these activities are located in the IGFBP-4 C-terminal protein fragment (CIBP-4), a region containing a thyroglobulin type 1 (Tg1) domain. Proteins bearing Tg1 domains have been shown to inhibit cathepsins, lysosomal enzymes involved in basement membrane degradation and implicated in tumor invasion and angiogenesis. In our studies, CIBP-4 was shown to internalize and co-localize with lysosomal-like structures in both endothelial cells (ECs) and glioblastoma U87MG cells. CIBP-4 also inhibited both growth factor-induced EC tubulogenesis in Matrigel and the concomitant increases in intracellular cathepsin B (CatB) activity. In vitro assays confirmed CIBP-4 capacity to block recombinant CatB activity. Biodistribution analysis of intravenously injected CIBP-4-Cy5.5 in a glioblastoma tumor xenograft model indicated targeted accumulation of CIBP-4 in tumors. Most importantly, CIBP-4 reduced tumor growth in this animal model by 60%. Pleiotropic anti-angiogenic and anti-tumorigenic activities of CIBP-4 most likely underlie its observed therapeutic potential against glioblastoma.
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Sun Y, Chen D, Cao L, Zhang R, Zhou J, Chen H, Li Y, Li M, Cao J, Wang Z. MiR-490-3p modulates the proliferation of vascular smooth muscle cells induced by ox-LDL through targeting PAPP-A. Cardiovasc Res 2013; 100:272-9. [DOI: 10.1093/cvr/cvt172] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Saad-Hussein A, Beshir S, Moubarz G, Elserougy S, Ibrahim MI. Effect of occupational exposure to aflatoxins on some liver tumor markers in textile workers. Am J Ind Med 2013; 56:818-24. [PMID: 23359393 DOI: 10.1002/ajim.22162] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/14/2012] [Indexed: 12/21/2022]
Abstract
BACKGROUND In a study of textile workers, the effects of occupational exposure to cotton dust-with possible exposure to aflatoxin-on levels of some liver tumor biomarkers were explored. METHODS The study included 58 textile workers and 64 controls. Skin prick tests, urinary Aflatoxin M1 (AFM1) and the tumor biomarkers (alpha-fetoprotein (AFP), alpha-L-fucosidase (AFU), insulin-like growth factors (IGF-1) were measured. RESULTS Positive reactants to Aspergillus niger, Aspergillus flavus, and cotton dust were significantly higher in pre-spinning (14.3%, 28.6%, and 28.6%, respectively) and spinning workers (25.0%, 33.3%, and 25.0%, respectively) compared to controls (4.7%, 7.8%, and 3.1%, respectively). Urinary AFM1 was significantly higher in the pre-spinning, spinning, and weaving groups compared to controls (554.2 ± 346.2 pg/ml, 459.1 ± 781.6 pg/ml, 296.5 ± 336.5 pg/ml and 68.5 ± 136.8 pg/ml, respectively). We found a highly significant increase in levels of serum AFU in textile workers, compared to the control group. CONCLUSION Exposure to fungi had a significant effect on AFM1 measurements and tumor biomarkers, especially in allergic textile workers (with the exception of the arginase biomarker), though results were generally within normal limits.
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Affiliation(s)
- Amal Saad-Hussein
- Department of Environmental & Occupational Medicine; National Research Centre; Cairo Egypt
| | - Safia Beshir
- Department of Environmental & Occupational Medicine; National Research Centre; Cairo Egypt
| | - Gehan Moubarz
- Department of Environmental & Occupational Medicine; National Research Centre; Cairo Egypt
| | - Safaa Elserougy
- Department of Environmental & Occupational Medicine; National Research Centre; Cairo Egypt
| | - Mohamed I.M. Ibrahim
- Department of Food Toxicology & Contaminants; National Research Centre; Cairo Egypt
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Rodríguez F, Salvetti N, Colombero M, Stangaferro M, Barbeito C, Ortega H, Rey F. Interaction between IGF1 and IGFBPs in bovine cystic ovarian disease. Anim Reprod Sci 2013; 140:14-25. [DOI: 10.1016/j.anireprosci.2013.04.012] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2012] [Revised: 04/15/2013] [Accepted: 04/25/2013] [Indexed: 11/27/2022]
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Nguyen DV, Calzi SL, Shaw LC, Kielczewski JL, Korah HE, Grant MB. An ocular view of the IGF-IGFBP system. Growth Horm IGF Res 2013; 23:45-52. [PMID: 23578754 PMCID: PMC3833084 DOI: 10.1016/j.ghir.2013.03.001] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/21/2012] [Revised: 02/28/2013] [Accepted: 03/13/2013] [Indexed: 01/16/2023]
Abstract
IGFs and their binding proteins have been shown to exhibit both protective and deleterious effects in ocular disease. Recent studies have characterized the expression patterns of different IGFBPs in retinal layers and within the vitreous. IGFBP-3 has roles in vascular protection stimulating proliferation, migration, and differentiation of vascular progenitor cells to sites of injury. IGFBP-3 increases pericyte ensheathment and shows anti-inflammatory effects by reducing microglia activation in diabetes. IGFBP-5 has recently been linked to mediating fibrosis in proliferative vitreoretinopathy but also reduces neovascularization. Thus, the regulatory balance between IGF and IGFBPs can have profound impact on target tissues. This review discusses recent findings of IGF and IGFBP expression in the eye with relevance to different retinopathies.
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Espelund U, Søndergaard K, Bjerring P, Flyvbjerg A, Frystyk J. Interstitial fluid contains higher in vitro IGF bioactivity than serum: a study utilizing the suction blister technique. Growth Horm IGF Res 2012; 22:234-239. [PMID: 22939216 DOI: 10.1016/j.ghir.2012.08.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/11/2012] [Revised: 08/06/2012] [Accepted: 08/06/2012] [Indexed: 11/25/2022]
Abstract
CONTEXT Circulating insulin-like growth factors (IGFs) are bound in complexes which affect their tissue-accessibility. Interstitial fluid is in close proximity to target cells, but the IGF-system is not well-described herein. OBJECTIVE To perform a thorough comparison of the IGF-system in suction blister fluid (SBF) vs. in serum, with emphasis on bioactive IGF levels. DESIGN Eight hour study including samples collected in the fasting state (20 h) and after a meal. SETTING Clinical research facility. PARTICIPANTS Six healthy males (age 37.0±8.8 years, BMI 22.5±1.4 kg/m(2)) (mean±SD). MAIN OUTCOME MEASURE Serum and SBF concentrations of bioactive IGF (determined in vitro by specific IGF-I receptor (IGF-IR) phosphorylation assay), immunoreactive IGF and IGF binding protein (IGFBP) levels, Western ligand blotting (WLB) of IGFBPs and IGFBP-3 Western immunoblotting (WiB). RESULTS The ability of SBF to phosphorylate the IGF-IR in vitro was 41±27% higher than that of serum (P=0.007 by repeated measures ANOVA). By contrast, immunoreactive IGF and IGFBP-concentrations were approximately 50% lower in SBF than in serum (all P≤0.002). A marked difference in the composition of IGFBPs between serum and SBF was observed, including 3-fold elevated amounts of IGFBP-3 fragments in SBF (P<0.001). For both IGF-I, IGF-II and IGFBP-2, the effect of food intake differed between serum and SBF (all P≤0.03). CONCLUSION Despite lower concentrations, the in vitro IGF bioactivity was higher in SBF than in serum. This may relate to an increased enzymatic IGFBP-degradation and an altered IGFBP-composition in SBF, making more IGF-I and -II accessible to the IGF-IR. The impact of food intake on the IGF system differs between serum and interstitial fluid.
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Affiliation(s)
- Ulrick Espelund
- Department of Endocrinology and Internal Medicine, Aarhus University Hospital, Denmark.
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The insulin and igf-I pathway in endocrine glands carcinogenesis. JOURNAL OF ONCOLOGY 2012; 2012:635614. [PMID: 22927847 PMCID: PMC3423951 DOI: 10.1155/2012/635614] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/03/2012] [Accepted: 06/20/2012] [Indexed: 12/26/2022]
Abstract
Endocrine cancers are a heterogeneous group of diseases that may arise from endocrine cells in any gland of the endocrine system. These malignancies may show an aggressive behavior and resistance to the common anticancer therapies. The etiopathogenesis of these tumors remains mostly unknown. The normal embryological development and differentiation of several endocrine glands are regulated by specific pituitary tropins, which, in adult life, control the function and trophism of the endocrine gland. Pituitary tropins act in concert with peptide growth factors, including the insulin-like growth factors (IGFs), which are considered key regulators of cell growth, proliferation, and apoptosis. While pituitary TSH is regarded as tumor-promoting factor for metastatic thyroid cancer, the role of other pituitary hormones in endocrine cancers is uncertain. However, multiple molecular abnormalities of the IGF system frequently occur in endocrine cancers and may have a role in tumorigenesis as well as in tumor progression and resistance to therapies. Herein, we will review studies indicating a role of IGF system dysregulation in endocrine cancers and will discuss the possible implications of these findings for tumor prevention and treatment, with a major focus on cancers from the thyroid, adrenal, and ovary, which are the most extensively studied.
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O’Kusky J, Ye P. Neurodevelopmental effects of insulin-like growth factor signaling. Front Neuroendocrinol 2012; 33:230-51. [PMID: 22710100 PMCID: PMC3677055 DOI: 10.1016/j.yfrne.2012.06.002] [Citation(s) in RCA: 139] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/27/2012] [Revised: 05/09/2012] [Accepted: 06/07/2012] [Indexed: 11/28/2022]
Abstract
Insulin-like growth factor (IGF) signaling greatly impacts the development and growth of the central nervous system (CNS). IGF-I and IGF-II, two ligands of the IGF system, exert a wide variety of actions both during development and in adulthood, promoting the survival and proliferation of neural cells. The IGFs also influence the growth and maturation of neural cells, augmenting dendritic growth and spine formation, axon outgrowth, synaptogenesis, and myelination. Specific IGF actions, however, likely depend on cell type, developmental stage, and local microenvironmental milieu within the brain. Emerging research also indicates that alterations in IGF signaling likely contribute to the pathogenesis of some neurological disorders. This review summarizes experimental studies and shed light on the critical roles of IGF signaling, as well as its mechanisms, during CNS development.
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Affiliation(s)
- John O’Kusky
- Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, British Columbia, Canada V5Z 1M9
| | - Ping Ye
- Department of Pediatrics, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, United States
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Frystyk J. Quantification of the GH/IGF-axis components: lessons from human studies. Domest Anim Endocrinol 2012; 43:186-97. [PMID: 22153974 DOI: 10.1016/j.domaniend.2011.11.005] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/26/2011] [Revised: 11/08/2011] [Accepted: 11/09/2011] [Indexed: 11/30/2022]
Abstract
Originally, the circulating bioactivity of IGF-I was estimated by bioassays measuring the ability of serum to stimulate uptake of labeled sulfate or thymidine in cultures of costal cartilage or by the ability of serum to stimulate the uptake of glucose in fat tissue cultures. However, because of their laborious and unspecific nature, the original bioassays were quickly abandoned with the development of the first RIA for IGF-I in 1977. Consequently, for the past three decades the endogenous IGF-I bioactivity has been almost exclusively estimated by the use of immunoassays. Beyond any doubt, the immunoassays have provided an extensive insight into IGF-I physiology and pathophysiology. However, immunoassays ignore the presence of the IGFBPs, which are important regulators of IGF-I action in vivo. In addition, immunoassays do not consider the presence of IGF-II, which also interacts with the IGF-I receptor (IGF-IR). This aroused our interest to reintroduce the bioassay; therefore, we established a cell-based kinase receptor activation (KIRA) assay based on cells transfected with the human IGF-IR. The output signal of the KIRA assay is IGF-IR phosphorylation, and, as such, it is highly specific. Further, because detection of phosphorylated IGF-IRs is based on modern immunoassay techniques, the overall performance of the assay is close to that of a traditional IGF-I immunoassay. The first part of this review comprises a short description of the bioassay, and a more in-depth presentation of the data that have been obtained so far. It will be demonstrated that the bioassay is indeed able to yield novel information on the IGF system, most likely because it is able to integrate the different components of the IGF system into one signal: IGF-IR activation. As IGF-I, circulating GH is bound to larger proteins, the far most important GH-binding protein (GHBP) is identical to the extracellular domain of the GH receptor (GHR). Because of its origin, GHBP binds GH with the same affinity as GHR and, consequently, GHBP may affect GH bioactivity as well as pharmacokinetics. To improve our knowledge on the complex interaction between GH and GHBP in vivo, we found it of interest to develop a method for determination of free GH. To this end, we developed an ultrafiltration assay that enabled isolation of free GH in undiluted serum during approached in vivo-like conditions. The last part of this review presents our current data on free GH and its interaction with GHBP.
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Affiliation(s)
- J Frystyk
- Medical Research Laboratories, Institute of Clinical Medicine, Faculty of Health Sciences, Aarhus University and Department of Endocrinology and Internal Medicine, Aarhus University Hospital, Nørrebrogade 44, DK-8000 Aarhus C, Denmark.
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Lunetta C, Serafini M, Prelle A, Magni P, Dozio E, Ruscica M, Sassone J, Colciago C, Moggio M, Corbo M, Silani V. Impaired expression of insulin-like growth factor-1 system in skeletal muscle of amyotrophic lateral sclerosis patients. Muscle Nerve 2012; 45:200-8. [PMID: 22246875 PMCID: PMC3306791 DOI: 10.1002/mus.22288] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Introduction Adult muscle fibers are a source of growth factors, including insulin-like growth factor-1 (IGF-1). These factors influence neuronal survival, axonal growth, and maintenance of synaptic connections. Methods We investigated the components of the IGF system in skeletal muscle samples obtained from 17 sporadic amyotrophic lateral sclerosis patients (sALS) and 29 control subjects (17 with normal muscle and 12 with denervated muscle unrelated to ALS). Results The muscle expression of IGF-1 and IGF-binding proteins 3, 4, and 5 (IGF-BP3, -4, and -5, respectively), assessed by immunohistochemistry, was differently decreased in sALS compared with both control groups; conversely, IGF-1 receptor β subunit (IGF-1Rβ) was significantly increased. Western blot analysis confirmed the severe reduction of IGF-1, IGF-BP3, and -BP5 with the increment of IGF-1Rβ in sALS. Conclusion In this study we describe the abnormal expression of the IGF-1 system in skeletal muscle of sALS patients that could participate in motor neuron degeneration and should be taken into account when developing treatments with IGF-1. Muscle Nerve, 2012
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Affiliation(s)
- Christian Lunetta
- Department of Neurology and Laboratory of Neuroscience, Dino Ferrari Center, IRCCS Istituto Auxologico Italiano, Università degli Studi di Milano, Milano, Italy.
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Zhai W, Zhang J, Shi Z, Fu Y. Identification and expression analysis of IGFBP-1 gene from Japanese flounder (Paralichthys olivaceus). Comp Biochem Physiol B Biochem Mol Biol 2012; 161:413-20. [PMID: 22290028 DOI: 10.1016/j.cbpb.2012.01.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2011] [Revised: 01/13/2012] [Accepted: 01/13/2012] [Indexed: 01/03/2023]
Abstract
Insulin-like growth factor binding protein-1 (IGFBP-1) plays an important role in IGF regulating vertebrate growth and development. In this study, we cloned IGFBP-1 cDNA from Japanese flounder (Paralichthys olivaceus) liver. The full-length cDNA is 1070 bp, including a 5'-untranslated region (UTR) of 69 bp, a 3'-UTR of 272 bp, and an open reading frame (ORF) of 729 bp encoding a polypeptide of 242 amino acids. Real-time quantitative PCR revealed that IGFBP-1 mRNA is mainly expressed in the liver, and a small amount of mRNAs was also found in other adult tissues. There are maternal transcripts of IGFBP-1 gene, and relatively low mRNA levels were observed in different embryonic stages. A higher level of IGFBP-1 mRNA was detected at 3 days post hatching (dph), and it got to the highest level at 29 dph (metamorphic climax), and finally brought back to a lower level at the end of metamorphosis. The expression of IGFBP-1 mRNA was greatly up-regulated in thyroid hormone (TH)-treated larvae, and declined after thiourea (TU) treatment. These results provide basic information for further studies on the role of IGF system in the P. olivaceus development and metamorphosis.
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Affiliation(s)
- Wanying Zhai
- Key laboratory of Freshwater Aquatic Genetic Resources, Shanghai Ocean University, Ministry of Agriculture, Shanghai 201306, PR China
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Fowlkes JL, Bunn R C, Thrailkill KM. Contributions of the Insulin/Insulin-Like Growth Factor-1 Axis to Diabetic Osteopathy. JOURNAL OF DIABETES & METABOLISM 2011; 1:S1-003. [PMID: 23484069 PMCID: PMC3593087 DOI: 10.4172/2155-6156.s1-003] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Recent studies in diabetic humans and rodent models of diabetes have identified osteopathy as a serious complication of type 1 (T1D) and type 2 (T2D) diabetes. Accumulating evidence suggests that disruption of insulin and insulin-like growth factor 1 (IGF-1) homeostasis in the diabetic condition may be responsible for the observed skeletal deficits. Indeed, replacement of insulin or IGF-1 in rodent models of T1D results in significant improvement in bone healing despite ongoing moderate to severe hyperglycemia. Insulin and IGF-1 act through distinct receptors. Mice in which the receptor for insulin or IGF-1 is selectively deleted from osteoblast lineages show skeletal deficits. Despite acting through distinct receptors, insulin and IGF-1 exert their cellular activities via conserved intracellular signaling proteins. Genetic manipulation of these signaling proteins, such as insulin receptor substrate (IRS)-1 and -2, Protein Kinase B (Akt), and MAPK/ERK kinase (MEK), has uncovered a significant role for these signal transduction pathways in skeletal homeostasis. In addition to effects on skeletal physiology via canonical signaling pathways, insulin and IGF-1 may crosstalk with wingless-int. (Wnt) and bone morphogenic protein 2 (BMP-2) signaling pathways in cells of the osteoblast lineage and thereby promote skeletal development. In this review, a discussion is presented regarding the role of insulin and IGF-1 in skeletal physiology and disruptions of this axis that occur in the diabetic condition which could underlie many of the skeletal pathologies observed.
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Affiliation(s)
- John L. Fowlkes
- Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock AR, USA
| | - Clay Bunn R
- Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock AR, USA
| | - Kathryn M. Thrailkill
- Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock AR, USA
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Tian J, Lambertz I, Berton TR, Rundhaug JE, Kiguchi K, Shirley SH, Digiovanni J, Conti CJ, Fischer SM, Fuchs-Young R. Transgenic insulin-like growth factor-1 stimulates activation of COX-2 signaling in mammary glands. Mol Carcinog 2011; 51:973-83. [PMID: 22006370 DOI: 10.1002/mc.20868] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2011] [Revised: 08/31/2011] [Accepted: 09/14/2011] [Indexed: 11/11/2022]
Abstract
Studies show that elevated insulin-like growth factor-1 (IGF-1) levels are associated with an increased risk of breast cancer; however, mechanisms through which IGF-1 promotes mammary tumorigenesis in vivo have not been fully elucidated. To assess the possible involvement of COX-2 signaling in the pro-tumorigenic effects of IGF-1 in mammary glands, we used the unique BK5.IGF-1 mouse model in which transgenic (Tg) mice have significantly increased incidence of spontaneous and DMBA-induced mammary cancer compared to wild type (WT) littermates. Studies revealed that COX-2 expression was significantly increased in Tg mammary glands and tumors, compared to age-matched WTs. Consistent with this, PGE(2) levels were also increased in Tg mammary glands. Analysis of expression of the EP receptors that mediate the effects of PGE(2) showed that among the four G-protein-coupled receptors, EP3 expression was elevated in Tg glands. Up-regulation of the COX-2/PGE(2) /EP3 pathway was accompanied by increased expression of VEGF and a striking enhancement of angiogenesis in IGF-1 Tg mammary glands. Treatment with celecoxib, a selective COX-2 inhibitor, caused a 45% reduction in mammary PGE(2) levels, attenuated the influx of mast cells and reduced vascularization in Tg glands. These findings indicate that the COX-2/PGE(2) /EP3 signaling pathway is involved in IGF-1-stimulated mammary tumorigenesis and that COX-2-selective inhibitors may be useful in the prevention or treatment of breast cancer associated with elevated IGF-1 levels in humans. © 2011 Wiley Periodicals, Inc.
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Affiliation(s)
- Jie Tian
- Department of Molecular Carcinogenesis, Science Park, The University of Texas MD Anderson Cancer Center, Smithville, Texas 78957, USA
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Rodríguez FM, Salvetti NR, Panzani CG, Barbeito CG, Ortega HH, Rey F. Influence of insulin-like growth factor-binding proteins-2 and -3 in the pathogenesis of cystic ovarian disease in cattle. Anim Reprod Sci 2011; 128:1-10. [DOI: 10.1016/j.anireprosci.2011.08.007] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2011] [Revised: 08/10/2011] [Accepted: 08/24/2011] [Indexed: 11/28/2022]
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Coyne GS, Kenny DA, Waters SM. Effect of dietary n-3 polyunsaturated fatty acid supplementation on bovine uterine endometrial and hepatic gene expression of the insulin-like growth factor system. Theriogenology 2010; 75:500-12. [PMID: 21111466 DOI: 10.1016/j.theriogenology.2010.09.018] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2010] [Revised: 09/14/2010] [Accepted: 09/14/2010] [Indexed: 11/30/2022]
Abstract
Supplementation of cattle diets with n-3 polyunsaturated fatty acids (n-3 PUFA) has been suggested to have positive effects on fertility. In addition, the actions of the insulin-like growth factor (IGF) system both systemically and locally have been shown to influence reproductive processes. The objective of this study was to evaluate the effect of dietary n-3 PUFA supplementation on hepatic and endometrial expression of IGF signalling genes in cattle. Beef heifers were supplemented with a rumen protected source of either a saturated fatty acid (palmitic acid; CON) or high n-3 PUFA diet (n-3 PUFA) for 45 days before slaughter and tissue recovery. Transcription level of candidate IGF signalling genes was measured by reverse transcription quantitative real-time PCR (RT-qPCR) in total RNA isolated from uterine endometrial and liver tissue from seven CON and seven n-3 PUFA supplemented animals. Compared to controls, mRNA abundance in n-3 PUFA liver tissues was higher for IGF-2R, IGFBP-1 and IGFBP-5 (P < 0.05); lower for GHR-1A (P < 0.05); and unchanged for IGF-1, IGF-2, IGF-1R, IGFBP-2, IGFBP-3, IGFBP-4, IGFBP-6, ALS and GHR(total) (P > 0.05). Compared to controls, mRNA abundance in n-3 PUFA endometrial tissues was higher for IGF-2, IGF-1R, IGF-2R and IGFBP-2 (P < 0.05); lower for IGF-1, IGFBP-3 and IGFBP-6 (P < 0.05); and unchanged for IGFBP-1, IGFBP-4, IGFBP-5 and GHR(total) (P > 0.05). Thus, dietary supplementation of cattle with n-3 PUFA affects transcription of genes involved in IGF signalling, in a tissue dependent fashion.
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Affiliation(s)
- Gerard S Coyne
- Teagasc, Animal Bioscience Centre, Dunsany, Co. Meath, Ireland
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Tokunaga K, Uto H, Takami Y, Mera K, Nishida C, Yoshimine Y, Fukumoto M, Oku M, Sogabe A, Nosaki T, Moriuchi A, Oketani M, Ido A, Tsubouchi H. Insulin-like growth factor binding protein-1 levels are increased in patients with IgA nephropathy. Biochem Biophys Res Commun 2010; 399:144-9. [DOI: 10.1016/j.bbrc.2010.07.032] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2010] [Accepted: 07/12/2010] [Indexed: 11/28/2022]
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Wang W, Ouyang K, Shangguan X, Xu M. Association of porcine IGF binding protein-5 gene with meat quality. Biochem Genet 2010; 48:257-65. [PMID: 19941052 DOI: 10.1007/s10528-009-9315-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2008] [Accepted: 07/23/2009] [Indexed: 02/07/2023]
Abstract
IGFBP-5 is a member of the IGF families. Using PCR-SSCP, genotypic and allelic frequencies were analyzed in 18 pig breeds (n = 600). The association between haplotypes and production performance was analyzed in a Jinhua x Pietrain population family (n = 212, total 24 traits). Two SNPs (T199C and G485A) within the gene were analyzed. The breeds had different genotypic and allelic frequencies. Typically, the Chinese native pig breeds carried a higher allele C and G frequency (over 50%) than those of the European pigs, and only Guangdong Large White and wild boar were at Hardy-Weinberg equilibrium. The pigs carrying the CG haplotype had higher hue, loin, and thigh pH1 values than pigs with the TA haplotype, and pigs with the TA haplotype had the lowest loin pH2 value and highest color-a value among the haplotypes. It is proposed that the IGFBP-5 gene is associated with the variation in meat quality, especially in pH value together with other QTLs on chromosome 15.
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Affiliation(s)
- Wenjun Wang
- College of Food Science and Engineering, Jiangxi Agricultural University, Nanchang 330045, China.
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Abstract
Crohn's disease manifests during childhood or adolescence in up to 25% of patients. The potential for linear growth impairment as a complication of chronic intestinal inflammation is unique to pediatric patient populations. Insulin-like growth factor I (IGF-I), produced by the liver in response to growth hormone (GH) stimulation, is the key mediator of GH effects at the growth plate of bones. An association between impaired growth in children with Crohn's disease and low IGF-I levels is well recognized. Early studies emphasized the role of malnutrition in suppression of IGF-I production. However, a simple nutritional hypothesis fails to explain all the observations related to growth in children with Crohn's disease. The direct, growth-inhibitory effects of proinflammatory cytokines are increasingly recognized and explored. The potential role of noncytokine factors, such as lipopolysaccharides, and their potential to negatively influence the growth axis have recently been investigated with intriguing results. There is now reason for optimism that the modern anticytokine therapeutic agents available for treating children and adolescents with Crohn's disease will reduce the prevalence of this otherwise common complication. As our understanding of the mechanisms that underlie growth impairment advance, so too should the opportunity for developing further novel and targeted therapies.
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Affiliation(s)
- Thomas D Walters
- Division of Gastroenterology, Hepatology and Nutrition, Hospital for Sick Children, University of Toronto, 555 University Avenue, Toronto, ON M5G 1X8, Canada.
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Fletcher L, Kohli S, Sprague SM, Scranton RA, Lipton SA, Parra A, Jimenez DF, Digicaylioglu M. Intranasal delivery of erythropoietin plus insulin-like growth factor-I for acute neuroprotection in stroke. Laboratory investigation. J Neurosurg 2009; 111:164-70. [PMID: 19284235 DOI: 10.3171/2009.2.jns081199] [Citation(s) in RCA: 71] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
OBJECT Individually, the cytokines erythropoietin (EPO) and insulin-like growth factor-I (IGF-I) have both been shown to reduce neuronal damage significantly in rodent models of cerebral ischemia. The authors have previously shown that EPO and IGF-I, when administered together, provide acute and prolonged neuroprotection in cerebrocortical cultures against N-methyl-D-aspartate-induced apoptosis. The aim of this study was to determine whether intranasally applied EPO plus IGF-I can provide acute neuroprotection in an animal stroke model and to show that intranasal administration is more efficient at delivering EPO plus IGF-I to the brain when compared with intravenous, subcutaneous, or intraperitoneal administration. METHODS The EPO and IGF-I were administered intranasally to mice that underwent transient middle cerebral artery occlusion (MCAO). Stroke volumes were measured after 1 hour of MCAO and 24 hours of reperfusion. To evaluate the long-term effects of this treatment, behavioral outcomes were assessed at 3, 30, 60, and 90 days following MCAO. Radiography and liquid scintillation were used to visualize and quantify the uptake of radiolabeled 125I-EPO and 125I-IGF-I into the mouse brain after intranasal, intravenous, subcutaneous, or intraperitoneal administration. RESULTS Intranasal administration of EPO plus IGF-I reduced stroke volumes within 24 hours and improved neurological function in mice up to 90 days after MCAO. The 125I-EPO and 125I-IGF-I were found in the brain within 20 minutes after intranasal administration and accumulated within the injured areas of the brain. In addition, intranasal administration delivered significantly higher levels of the applied 125I-EPO and 125I-IGF-I to the brain compared with intravenous, subcutaneous, or intraperitoneal administration. CONCLUSIONS The data demonstrate that intranasal EPO plus IGF-I penetrates into the brain more efficiently than other drug delivery methods and could potentially provide a fast and efficient treatment to prevent chronic effects of stroke.
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Affiliation(s)
- Lauren Fletcher
- Department of Neurosurgery, University of Texas Health Science Center San Antonio, San Antonio, Texas 78229, USA
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Ueki I, Giesy SL, Harvatine KJ, Kim JW, Boisclair YR. The acid-labile subunit is required for full effects of exogenous growth hormone on growth and carbohydrate metabolism. Endocrinology 2009; 150:3145-52. [PMID: 19299456 PMCID: PMC2703525 DOI: 10.1210/en.2008-1740] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Normal postnatal growth is dependent in part on overlapping actions of GH and IGF-I. These actions reflect GH stimulation of IGF-I production in liver and extrahepatic tissues, representing respectively the endocrine and autocrine/paracrine arms of the IGF system. Recent experiments in genetically modified mice show that each source of IGF-I can compensate for absence of the other but do not resolve their relative role in postnatal growth. In an effort to address this issue, we studied the GH responsiveness of mice harboring a null mutation of the acid-labile subunit (ALS). Null ALS mice have a substantial reduction in endocrine IGF-I but, unlike other models of plasma IGF-I deficiency, have no obvious additional endocrine defects. Wild type and null ALS mice of both sexes received daily sc injections of saline or recombinant bovine GH between d 35 and 63 of postnatal age. The GH-stimulated body weight gain of null ALS mice was reduced by more than 30% relative to wild type mice, irrespective of sex. Reductions in GH responsiveness were also seen for kidney and linear growth. Absence of ALS eliminated the ability of GH to increase plasma IGF-I despite intact GH-dependent stimulation of IGF-I expression in liver, adipose tissue, and skeletal muscle. GH treatment was also less efficient in antagonizing insulin action in null ALS mice. Overall, these results suggest that the GH effects mediated by endocrine IGF-I depends on ALS, and accordingly null ALS mice are less responsive to exogenous GH therapy.
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Affiliation(s)
- Iori Ueki
- Department of Animal Science, Cornell University, Ithaca, New York 14853, USA
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Leng L, Wang S, Li Z, Wang Q, Li H. A polymorphism in the 3'-flanking region of insulin-like growth factor binding protein 2 gene associated with abdominal fat in chickens. Poult Sci 2009; 88:938-42. [PMID: 19359680 DOI: 10.3382/ps.2008-00453] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Insulin-like growth factor binding protein 2 (IGFBP2) is the predominant insulin-like growth factor binding protein in serum of different species. It binds insulin-like growth factors and plays an important role in growth and fat metabolism. The current study was designed to investigate the associations of IGFBP2 gene 3'-flanking region polymorphisms with chicken fatness traits. The random populations (5 distinct populations: Arbor Acres broiler, Hyline Brown layer, Shiqiza, BeijingYou, and Baier), the Northeast Agricultural University broiler lines divergently selected for abdominal fat content (NEAUHLF), and the the Northeast Agricultural University F(2) (NEAU F(2)) resource population were used in the current study. Body weight and body composition traits were measured in NEAUHLF and NEAU F(2) populations. A SNP of 1196C > A in the 3'-flanking region of the IGFBP2 gene was detected, and the PCR-single strand conformation polymorphism method was then used to genotype all of the individuals derived from the above populations. There was a highly significant difference (P < 0.01) in the allele frequency among the 5 distinct populations. The IG-FBP2 polymorphism was significantly associated with abdominal fat weight and percentage of abdominal fat (P < 0.05) in NEAUHLF and NEAU F(2) populations. The research suggests that the IGFBP2 gene could be a candidate locus or linked to a major gene that affects fatness traits in chickens.
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Affiliation(s)
- L Leng
- College of Animal Science and Technology, Northeast Agricultural University, Harbin 150030, P. R. China
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Lin Y, Jiang T, Zhou K, Xu L, Chen B, Li G, Qiu X, Jiang T, Zhang W, Song SW. Plasma IGFBP-2 levels predict clinical outcomes of patients with high-grade gliomas. Neuro Oncol 2009; 11:468-76. [PMID: 19164435 DOI: 10.1215/15228517-2008-114] [Citation(s) in RCA: 71] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Insulin-like growth factor binding protein 2 (IGFBP-2) is a malignancy-associated protein measurable in tumors and blood. Increased IGFBP-2 is associated with shortened survival of advanced glioma patients. Thus, we examined plasma IGFBP-2 levels in glioma patients and healthy controls to evaluate its value as a plasma biomarker for glioma. Plasma IGFBP-2 levels in 196 patients with newly diagnosed glioma and 55 healthy controls were analyzed using an IGFBP-2 ELISA kit. Blood was collected before surgery, after two-cycle adjuvant chemotherapy, and at recurrence. Plasma IGFBP-2 levels were correlated with disease-free survival (DFS) using Cox regression analyses. We found that preoperative plasma IGFBP-2 levels were significantly higher in high-grade glioma patients (n = 43 for grade III glioma; n = 72 for glioblastoma multiforme [GBM]) than in healthy controls (n = 55; p < 0.001) and low-grade (grade II) glioma patients (n = 81; p < 0.001). No significant differences in preoperative plasma IGFBP-2 levels were observed between grade III glioma and GBM patients or between grade II glioma patients and healthy controls. After recurrence, plasma IGFBP-2 levels were significantly increased in GBM patients (n = 26; p < 0.001). Preoperative plasma IGFBP-2 levels were significantly correlated with DFS in GBM patients (hazard ratio, 1.404; 95% confidence interval, 1.078-1.828; p = 0.012). We conclude that preoperative plasma IGFBP-2 levels are significantly higher in high-grade glioma patients than in low-grade glioma patients and healthy subjects, and are significantly correlated with recurrence and DFS in patients with GBM. Longitudinal studies with a larger study population are needed to confirm these findings.
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Affiliation(s)
- Yi Lin
- LIAMA Center for Computational Medicine, National Laboratory of Pattern Recognition, Institute of Automation, Chinese Academy of Sciences, Beijing, China
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Cacalano NA, Le D, Paranjpe A, Wang MY, Fernandez A, Evazyan T, Park NH, Jewett A. Regulation of IGFBP6 gene and protein is mediated by the inverse expression and function of c-jun N-terminal kinase (JNK) and NFkappaB in a model of oral tumor cells. Apoptosis 2008; 13:1439-49. [PMID: 18982452 DOI: 10.1007/s10495-008-0270-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
The aim of this study is to identify potential gene and protein targets when nuclear factor kappa B (NFkappaB) and c-jun N-terminal kinase (JNK) were inversely expressed in oral tumors. To determine which genes were regulated synergistically by the inverse expression of NFkappaB and JNK, a pathway specific microarray analysis was performed. While either inhibition of NFkappaB or activation of JNK alone was unable to affect the IGFBP6 gene expression in microarray analysis, concomitant increase in JNK activation in the presence of NFkappaB inhibition increased the expression of this gene significantly. Synergistic increase in IGFBP6 gene expression was also confirmed by RT-PCR and Northern blot analysis of transfected cells. Accordingly, the levels of IGFBP6 protein secretion rose synergistically when JNK was over-expressed in NFkappaB knock down cells. In addition, increased expression of JNK in the absence of NFkappaB resulted in a significant induction of cell death in oral tumors when either left untreated or treated with TNF-alpha and TPA. Moreover, when JNK was inhibited by dominant negative JNK (APF), a significant decrease in cell death could be observed in TNF-alpha and TPA treated NFkappaB knock down oral tumors. Therefore, increased induction of IGFBP6 gene or protein expression in oral tumors could be regarded as a potential predictive marker of tumor sensitivity and could be used for prognostic purposes, since a significant correlation could be observed between increased induction of apoptotic cell death and elevated levels of IGFBP6 in these tumors.
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Affiliation(s)
- Nicholas A Cacalano
- Department of Radiation Oncology, UCLA School of Dentistry and Medicine, Los Angeles, CA 90095, USA
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Perks CM, Holly JMP. IGF binding proteins (IGFBPs) and regulation of breast cancer biology. J Mammary Gland Biol Neoplasia 2008; 13:455-69. [PMID: 19031049 DOI: 10.1007/s10911-008-9106-4] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/02/2008] [Accepted: 11/11/2008] [Indexed: 01/13/2023] Open
Abstract
The IGFBP family comprises six proteins with high affinity for the IGFs. Changes in the balance of the components of the IGF system may contribute to the progression of breast cancer. In tumours the abundance of IGFBPs relates to the estrogen receptor status and their production in the breast is controlled by hormones, principally estrogen and progesterone. Important interactions occur between IGFBPs and key growth regulators such as TGF-beta, PTEN and EGF which are reviewed. The conflicting observations between the effects of IGFBPs on the risk of breast cancer, in particular IGFBP-3, obtained from epidemiology studies in comparison to in vivo observations are highlighted and potential explanations provided. The functional activity of IGFBPs can also be affected by proteolysis, phosphorylation and glycosylation and the implications of these are described. The IGFs are generally present at levels far in excess of that required for maximal receptor stimulation, and the IGFBPs are critical regulators of their cellular actions. IGFBPs can affect cell function in an IGF-dependent or independent manner. The key mechanisms underlying the intrinsic actions of the IGFBPs are still in debate. IGF bioactivity locally in the breast is influenced not only by local tissue expression and regulation of IGFs, IGFBPs and IGFBP proteases, but also by these factors delivered from the circulation. Finally, the therapeutic potential of IGFBPs-2 and -3 are considered together with key questions that still need to be addressed.
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Affiliation(s)
- Claire M Perks
- Department of Clinical Sciences North Bristol, IGFs and Metabolic Endocrinology Group, University of Bristol, Southmead Hospital, The Medical School Unit, Bristol, BS10 5NB, UK.
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Abellan R, Ventura R, Palmi I, di Carlo S, Bacosi A, Bellver M, Olive R, Pascual JA, Pacifici R, Segura J, Zuccaro P, Pichini S. Immunoassays for the measurement of IGF-II, IGFBP-2 and -3, and ICTP as indirect biomarkers of recombinant human growth hormone misuse in sport. J Pharm Biomed Anal 2008; 48:844-52. [DOI: 10.1016/j.jpba.2008.05.037] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2008] [Revised: 05/29/2008] [Accepted: 05/30/2008] [Indexed: 11/30/2022]
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Pereira-Fantini PM, Thomas SL, Taylor RG, Nagy E, Sourial M, Fuller PJ, Bines JE. Colostrum supplementation restores insulin-like growth factor -1 levels and alters muscle morphology following massive small bowel resection. JPEN J Parenter Enteral Nutr 2008; 32:266-75. [PMID: 18443138 DOI: 10.1177/0148607108316197] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
BACKGROUND Colostrum protein concentrate (CPC) contains a high level of insulin-like growth factor-1 (IGF-1). IGF-1 and IGF binding protein (IGFBPs) may play an important role during the postresection adaptation response. As smooth muscle is an important site for IGF-1 action in the intestine, this study aims to (1) investigate the effect of CPC supplementation on circulating levels and tissue expression of IGF-1, IGF-1 receptor, and IGFBPs following massive small bowel resection (MSBR), and (2) characterize the effect of CPC on the muscular adaptation response following MSBR. METHODS Four-week-old piglets underwent either a 75% MSBR or sham operation. Piglets received either a polymeric infant formula (PIF) diet or PIF supplemented with CPC for 8 weeks. Serum was analyzed by enzyme-linked immunosorbent assay, and ileal tissue assessed by molecular and histological analysis. RESULTS There was no difference in IGF-1 or IGFBPs mRNA among groups. CPC treatment resulted in significant increases in circulating levels of IGF-1 and IGFBPs and a concurrent increase in muscle width and the number of muscle cells, but did not alter muscle cell size. CONCLUSIONS Strategies aimed at increasing muscular adaptation may decrease Gl transit and allow greater mucosal contact time for absorption. We have shown that CPC supplementation following resection results in increased levels of circulating IGF-1, IGFBP-2, and IGFBP-3 and muscular hypertrophy. Our results suggest that IGF-1 and its mediators may play a role in the muscular adaptation response and warrant further exploration as a treatment option for short bowel syndrome.
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Affiliation(s)
- Prue M Pereira-Fantini
- Intestinal Failure and Clinical Nutrition Group, Murdoch Childrens Research Institute, Atlantic Philanthropy Building, Flemington Road, Parkville 3052, Victoria, Australia.
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Wang W, Meng Q, Hu X, Fei J, Feng J, Liu W, Li N. Chromosome location and association of haplotypes of insulin-like growth factor binding protein-2 with production performance in swine. Biochem Genet 2008; 46:381-91. [PMID: 18427978 DOI: 10.1007/s10528-007-9128-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2007] [Accepted: 07/24/2007] [Indexed: 02/07/2023]
Abstract
Insulin-like growth factor binding protein-2 is a member of the insulin-like growth factor families. Using a porcine RH panel, the gene was mapped on chromosome 15q22-23. Meanwhile, using polymerase chain reaction single strand conformation polymorphism, genotypic and allelic frequencies were analyzed in 17 pig breeds (total animals 570), together with a chi-square test of Hardy-Weinberg equilibrium. Also the association between haplotypes and production performance was analyzed in a Lantang x Landrace population family (n = 133, total 43 traits). At each locus we investigated, all the breeds showed different genotypic and allelic frequency distributions. In general, the Chinese native pig breeds carried a higher allele A frequency (over 50%) than the European pigs. For production performance, pigs with the CAG haplotype had higher fore-body and rear-body weight than those with the TGT and TAG haplotypes (P < 0.05). Also, pigs with the CAG haplotype had higher bone weight of the rear-body than those with the CAT haplotype (P < 0.05); pigs with the TGT and CAG haplotypes had higher forelimb and rearlimb weight than those with the CAT haplotype (P < 0.01 and P < 0.05, respectively); pigs with the TGG haplotype had higher leaf fat weight than those with the TGT and CAG haplotypes (P < 0.05); and pigs with the CAG haplotype had more stomach weight than those with the CAT and CGT haplotypes (P < 0.01); pigs with the TGT and CAG haplotypes had more ribs and longer body than those with the CGT-TGG, and CAT-TAG haplotypes (P < 0.05). These results suggest that IGFBP-2 is associated with production performance, but our population family was small. More studies with large samples are needed before the IGFBP-2 locus will be useful for a selection program.
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Affiliation(s)
- Wenjun Wang
- College of Food Science, Jiangxi Agricultural University, Nanchang, Jiangxi, 330045, People's Republic of China
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