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Maffei P, Dassie F, Wennberg A, Parolin M, Vettor R. The Endothelium in Acromegaly. Front Endocrinol (Lausanne) 2019; 10:437. [PMID: 31396153 PMCID: PMC6667653 DOI: 10.3389/fendo.2019.00437] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Accepted: 06/18/2019] [Indexed: 12/12/2022] Open
Abstract
Growth hormone (GH) and insulin like growth factor-1 (IGF-1) excess induce well-known deleterious effects on the cardiovascular system, especially after long-term exposition. Acromegaly, a condition of chronic GH and IGF-1 hypersecretion, is frequently associated to cardiovascular complications, although recent studies have shown a reduction in the prevalence of these comorbidities in well-controlled patients and a mortality risk similar to normal aging population. Many factors could contribute to the increased cardiovascular risk of acromegaly patients. Among these factors, the endothelium plays a key role in the pathogenesis of atherosclerotic plaques and could be considered an early marker of atherosclerosis and cardiovascular dysfunction. In this review we examined the relationship between GH/IGF-1 excess and the endothelium, from basic studies to clinical evidence. Many studies involving various arterial districts (microvascular arteries of retina, kidney and brain, and major vessels as carotid and aorta) showed that GH/IGF-1 excess promotes endothelial dysfunction via several different mechanisms. Increased endothelial proliferation, dysfunction of endothelial progenitor cells, increased oxidative stress, and compromised oxidative defenses are the main factors that are associated with endothelial dysfunction. In the general population, these alterations are associated with the development of atherosclerosis with an increased incidence of coronary artery disease and cerebrovascular complications. However, in acromegaly this is still a debated issue, despite the presence of many pro-atherogenic factors and comorbidities, such as hypertension, diabetes, sleep apnoea, and metabolic syndrome. Preclinical markers of atherosclerosis as arterial intima media thickness, pulse wave velocity and flow mediated dilation seem to be impaired in acromegaly and partly mediated by the endothelium dysfunction. In conclusion, the pathophysiology of endothelial dysfunction in the condition of GH and IGF-1 excess remains a crucial area of investigation to fully dissect the association of acromegaly with cardiovascular disease complications.
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Affiliation(s)
- Pietro Maffei
- Clinica Medica 3, Department of Medicine (DIMED), Padua University Hospital, Padua, Italy
- *Correspondence: Pietro Maffei
| | - Francesca Dassie
- Clinica Medica 3, Department of Medicine (DIMED), Padua University Hospital, Padua, Italy
| | - Alexandra Wennberg
- Clinica Neurologica, Department of Neurosciences (DNS), Padua University Hospital, Padua, Italy
| | - Matteo Parolin
- Clinica Medica 3, Department of Medicine (DIMED), Padua University Hospital, Padua, Italy
| | - Roberto Vettor
- Clinica Medica 3, Department of Medicine (DIMED), Padua University Hospital, Padua, Italy
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Messias de Lima CF, Dos Santos Reis MD, da Silva Ramos FW, Ayres-Martins S, Smaniotto S. Growth hormone modulates in vitro endothelial cell migration and formation of capillary-like structures. Cell Biol Int 2017; 41:577-584. [PMID: 28205281 DOI: 10.1002/cbin.10747] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2016] [Accepted: 02/13/2017] [Indexed: 12/21/2022]
Abstract
The generation of new blood vessels is a complex process mediated by a variety of growth factors, and the growth hormone (GH) has been shown to act as a proangiogenic factor. In fact, human GH deficiency or excess are associated with endothelial dysfunction. Moreover, mouse models have revealed the action of GH in both tissue repair and in the microvascular circulation of normal tissues. In this study, we investigated the in vitro effects of GH on endothelial cells. Using a murine endothelioma cell line (tEnd.1), we demonstrated that GH has a mitogenic effect. The hormone also affected the endothelial cellular morphology and augmented the deposition of the extracellular matrix molecules, laminin, and fibronectin, on tEnd.1 surface. GH could stimulate tEnd.1 cell fugetaxis, in transwell chambers migration assay, and increased the formation of capillary-like structures in Matrigel®-coated plates. Given the important role of angiogenesis during tissue injury, for example, at ischemic lesions, these findings shed light on therapeutic angiogenesis, particularly in pathologies where the cardiovascular system has been compromised.
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Affiliation(s)
- Cícero Fagner Messias de Lima
- Laboratory of Cell Biology, Institute of Biology and Health Science, Federal University of Alagoas, Maceió, Alagoas, Brazil
| | - Maria Danielma Dos Santos Reis
- Laboratory of Cell Biology, Institute of Biology and Health Science, Federal University of Alagoas, Maceió, Alagoas, Brazil
| | | | - Silvana Ayres-Martins
- Laboratory of Cell Biology, Institute of Biology and Health Science, Federal University of Alagoas, Maceió, Alagoas, Brazil
| | - Salete Smaniotto
- Laboratory of Cell Biology, Institute of Biology and Health Science, Federal University of Alagoas, Maceió, Alagoas, Brazil
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Combined effect of insulin-like growth factor-1 and CC chemokine ligand 2 on angiogenic events in endothelial cells. PLoS One 2015; 10:e0121249. [PMID: 25830234 PMCID: PMC4382320 DOI: 10.1371/journal.pone.0121249] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2014] [Accepted: 01/29/2015] [Indexed: 12/31/2022] Open
Abstract
Therapeutic angiogenesis may be applied in medical conditions to promote stimulation of angiogenesis. Angiogenesis is a multistep process, which includes endothelial cell proliferation, migration, and tube formation, which is mediated by various angiogenic polypeptides. Thus, studies that elucidate the cellular mechanisms involved in these processes are necessary to develop novel therapeutic strategies. This study investigated the in vitro effects of the pro-angiogenic factors, insulin-like growth factor-1 (IGF-1) and/or chemokine (CC motif) ligand 2 (CCL2), on endothelial cells. Flow cytometry analysis showed that IGF-1 and CCL2 treatment did not interfere with IGF-1 receptor (IGF-1R) expression, but CCL2 treatment increased CCL2 receptor (CCR2) expression. Immunofluorescence analysis revealed that the IGF-1/CCL2 combination induced a greater increase in fibronectin deposition, but the treatments did not alter the expression of the fibronectin receptors, CD49e and CD44. The interaction of fibronectin with cytokines demonstrated that IGF-1/CCL2 promoted changes in intermediate F-actin remodeling that may result in increased endothelial cell adhesion and cell migration mediated by fibronectin. Furthermore, IGF-1/CCL2 stimulated endothelial cells, grown on fibronectin, to form capillary-like structures and intercellular lumina with greater luminal area. These data suggest that IGF-1/CCL2 combination and a fibronectin matrix may contribute to the angiogenesis process to stimulate adhesion, migration, and tube formation by endothelial cells as a result of F-actin remodeling.
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Overman JR, Helder MN, ten Bruggenkate CM, Schulten EAJM, Klein-Nulend J, Bakker AD. Growth factor gene expression profiles of bone morphogenetic protein-2-treated human adipose stem cells seeded on calcium phosphate scaffolds in vitro. Biochimie 2013; 95:2304-13. [PMID: 24028822 DOI: 10.1016/j.biochi.2013.08.034] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2013] [Accepted: 08/27/2013] [Indexed: 12/17/2022]
Abstract
The secretome of stem cells strongly determines the outcome of tissue engineering strategies. We investigated how the secretome of human adipose stem cells (hASCs) can be affected by substrate, BMP-2 treatment, and degree of differentiation. We hypothesized that as differentiation progresses, hASCs produce increasingly more gene products associated with processes such as angiogenesis and bone remodeling. Human ASCs were treated for 15 min with BMP-2 (10 ng/ml) to enhance osteogenic differentiation, or with vehicle. Subsequently, hASCs were seeded on plastic or on biphasic calcium phosphate (BCP) consisting of 60% hydroxyapatite and 40% β-tricalcium phosphate. A PCR array for ~150 trophic factors and differentiation-related genes was performed at day 21 of culture. A limited set of factors was quantified by qPCR at days 0, 4, 14 and 21, and/or ELISA at day 21. Compared to plastic, BCP-cultured hASCs showed ≥2-fold higher expression of ~20 factors, e.g. cytokines such as IL-6, growth factors such as FGF7 and adhesion molecules such as VCAM1. Expression of another ~50 genes was decreased ≥2-fold on BCP vs. plastic, even though hASCs differentiate better on BCP than on plastic. BMP-2-treatment increased the expression of ~30 factors by hASCs seeded on BCP, while it decreased the expression of only PGF, PPARG and PTN. Substrate affected hASC secretion of Activin A and seemed to affect P1NP release. No clear association between hASC osteogenic differentiation and growth factor expression pattern was observed. Considering our observed lack of association between the degree of differentiation and the expression of factors associated with angiogenesis and bone remodeling by hASCs, future bone regeneration studies should focus more on systematically orchestrating the secretome of stem cells, rather than on inducing osteogenic differentiation of stem cells only. Short incubation with BMP-2 may be a promising treatment to enhance both osteogenic differentiation and environmental modulation.
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Affiliation(s)
- J R Overman
- Dept. Oral Cell Biology, Academic Centre for Dentistry Amsterdam, University of Amsterdam and VU University Amsterdam, MOVE Research Institute Amsterdam, Amsterdam, The Netherlands; Dept. Oral and Maxillofacial Surgery, Academic Centre for Dentistry Amsterdam/VU University Medical Center, MOVE Research Institute Amsterdam, Amsterdam, The Netherlands
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Zhang R, Xu GL, Li Y, He LJ, Chen LM, Wang GB, Lin SY, Luo GY, Gao XY, Shan HB. The role of insulin-like growth factor 1 and its receptor in the formation and development of colorectal carcinoma. J Int Med Res 2013; 41:1228-35. [PMID: 23801064 DOI: 10.1177/0300060513487631] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
OBJECTIVE To investigate the role of insulin-like growth factor (IGF)-1 and its receptor (IGF1R) in the formation and development of colorectal carcinoma. METHODS Colorectal tissue and matching serum samples were collected from patients with adenomatous polyps or carcinoma and healthy control subjects. IGF1R mRNA levels were determined via quantitative real-time reverse transcription-polymerase chain reaction. Serum IGF1 was quantified using enzyme-linked immunosorbent assay. RESULTS Serum IGF1 concentrations and mucosal IGF1R mRNA levels were significantly higher in patients with adenomatous polyps (n = 24) or carcinoma (n = 13) compared with healthy control subjects (n = 13). There was a significant positive correlation between serum IGF1 and mucosal IGF1R mRNA in patients with adenomatous polyps. CONCLUSIONS High circulating IGF1 concentrations and mucosal IGF1R expression may play important roles in both the formation and development of colorectal carcinoma. IGF1 and its receptor may be activated before carcinogenesis, and may promote the growth and malignant transformation of adenomatous polyps. IGF1 and IGF1R may be useful biomarkers for evaluating the stage and risk of carcinogenesis.
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Affiliation(s)
- Rong Zhang
- State Key Laboratory of Oncology in Southern China, Guangzhou, China
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Jong HL, Mustafa MR, Vanhoutte PM, AbuBakar S, Wong PF. MicroRNA 299-3p modulates replicative senescence in endothelial cells. Physiol Genomics 2013; 45:256-67. [PMID: 23362143 DOI: 10.1152/physiolgenomics.00071.2012] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
MicroRNAs (miRNAs) regulate various cellular processes. While several genes associated with replicative senescence have been described in endothelial cells, miRNAs that regulate these genes remain largely unknown. The present study was designed to identify miRNAs associated with replicative senescence and their target genes in human umbilical vein endothelial cells (HUVECs). An integrated miRNA and gene profiling approach revealed that hsa-miR-299-3p is upregulated in senescent HUVECs compared with the young cells, and one of its target genes could be IGF1. IGF1 was upregulated in senescent compared with young HUVECs, and knockdown of hsa-miR-299-3p dose-dependently increased the mRNA expression of IGF1, more significantly observed in the presenescent cells (passage 19) compared with the senescent cells (passage 25). Knockdown of hsa-miR-299-3p also resulted in significant reduction in the percentage of cells positively stained for senescence-associated β-galactosidase and increases in cell viability measured by MTT assay but marginal increases in cell proliferation and cell migration capacity measured by real-time growth kinetics analysis. Moreover, knockdown of hsa-miR-299-3p also increased proliferation of cells treated with H2O2 to induce senescence. These findings suggest that hsa-miR-299-3p may delay or protect against replicative senescence by improving the metabolic activity of the senesced cells but does not stimulate growth of the remaining cells in senescent cultures. Hence, these findings provide an early insight into the role of hsa-miR-299-3p in the modulation of replicative senescence in HUVECs.
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Affiliation(s)
- Hui-Lan Jong
- Department of Pharmacology, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
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Jin MH, Yokoyama U, Sato Y, Shioda A, Jiao Q, Ishikawa Y, Minamisawa S. DNA microarray profiling identified a new role of growth hormone in vascular remodeling of rat ductus arteriosus. J Physiol Sci 2011; 61:167-79. [PMID: 21287305 PMCID: PMC10717642 DOI: 10.1007/s12576-011-0133-3] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2010] [Accepted: 12/28/2010] [Indexed: 12/22/2022]
Abstract
The ductus arteriosus (DA), a fetal arterial connection between the pulmonary artery and the aorta, has a character distinct from the adjacent arteries. We compared the transcriptional profiles of the DA and the aorta of Wistar rat fetuses on embryonic day 19 (preterm) and day 21 (near-term) using DNA microarray analyses. We found that 39 genes were expressed 2.5-fold greater in the DA than in the aorta. Growth hormone (GH) receptor (GHR) exhibited the most significant difference in expression. Then, we found that GH significantly promoted migration of DA smooth muscle cells (SMCs), thus enhancing the intimal cushion formation of the DA explants. GH also regulated the expression of cytoskeletal genes in DA SMCs, which may retain a synthetic phenotype in the smooth muscle-specific cytoskeletal genes. Thus, the present study revealed that GH-GHR signal played a role in the vascular remodeling of the DA.
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MESH Headings
- Animals
- Aorta/embryology
- Aorta/metabolism
- Carrier Proteins/genetics
- Carrier Proteins/metabolism
- Cell Growth Processes/physiology
- Cell Movement/physiology
- Cells, Cultured
- Cytoskeleton/genetics
- Ductus Arteriosus/embryology
- Ductus Arteriosus/metabolism
- Endothelium, Vascular/embryology
- Endothelium, Vascular/metabolism
- Fetus/metabolism
- Gene Expression Profiling/methods
- Growth Hormone/metabolism
- Muscle, Smooth, Vascular/embryology
- Muscle, Smooth, Vascular/metabolism
- Oligonucleotide Array Sequence Analysis/methods
- RNA, Messenger/analysis
- RNA, Messenger/genetics
- Rats
- Rats, Wistar
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Affiliation(s)
- Mei-Hua Jin
- Cardiovascular Research Institute, Yokohama City University, 3-9 Fukuura, Kanazawa-ku, Yokohama, 236-0004 Japan
| | - Utako Yokoyama
- Cardiovascular Research Institute, Yokohama City University, 3-9 Fukuura, Kanazawa-ku, Yokohama, 236-0004 Japan
| | - Yoji Sato
- Division of Cellular and Gene Therapy Products, National Institute of Health Sciences, 1-18-1 Kamiyoga, Setagaya-ku, Tokyo, 158-8501 Japan
| | - Aki Shioda
- Cardiovascular Research Institute, Yokohama City University, 3-9 Fukuura, Kanazawa-ku, Yokohama, 236-0004 Japan
| | - Qibin Jiao
- Department of Life Science and Medical Bioscience, Waseda University Graduate School of Advanced Science and Engineering, 2-2 Wakamatsucho, Shinjuku-ku, Tokyo, 162-8480 Japan
| | - Yoshihiro Ishikawa
- Cardiovascular Research Institute, Yokohama City University, 3-9 Fukuura, Kanazawa-ku, Yokohama, 236-0004 Japan
| | - Susumu Minamisawa
- Cardiovascular Research Institute, Yokohama City University, 3-9 Fukuura, Kanazawa-ku, Yokohama, 236-0004 Japan
- Department of Life Science and Medical Bioscience, Waseda University Graduate School of Advanced Science and Engineering, 2-2 Wakamatsucho, Shinjuku-ku, Tokyo, 162-8480 Japan
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Brunet-Dunand SE, Vouyovitch C, Araneda S, Pandey V, Vidal LJP, Print C, Mertani HC, Lobie PE, Perry JK. Autocrine human growth hormone promotes tumor angiogenesis in mammary carcinoma. Endocrinology 2009; 150:1341-52. [PMID: 18974274 DOI: 10.1210/en.2008-0608] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Accumulating literature implicates pathological angiogenesis and lymphangiogenesis as playing key roles in tumor progression. Autocrine human growth hormone (hGH) is a wild-type orthotopically expressed oncogene for the human mammary epithelial cell. Herein we demonstrate that autocrine hGH expression in the human mammary carcinoma cell line MCF-7 stimulated the survival, proliferation, migration, and invasion of a human microvascular endothelial cell line (HMEC-1). Autocrine/paracrine hGH secreted from mammary carcinoma cells also promoted HMEC-1 in vitro tube formation as a consequence of increased vascular endothelial growth factor-A (VEGF-A) expression. Semiquantitative RT-PCR analysis demonstrated that HMEC-1 cells express both hGH and the hGH receptor (hGHR). Functional antagonism of HMEC-1-derived hGH reduced HMEC-1 survival, proliferation, migration/invasion, and tube formation in vitro. Autocrine/paracrine hGH secreted by mammary carcinoma cells increased tumor blood and lymphatic microvessel density in a xenograft model of human mammary carcinoma. Autocrine hGH is therefore a potential master regulator of tumor neovascularization, coordinating two critical processes in mammary neoplastic progression, angiogenesis and lymphangiogenesis. Consideration of hGH antagonism to inhibit angiogenic processes in mammary carcinoma is therefore warranted.
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Kozakai T, Sakate M, Saida K. Regulation of endothelin-1 expression and function by nutrient stress in mouse colon epithelia. Scand J Gastroenterol 2008; 43:886-94. [PMID: 18584528 DOI: 10.1080/00365520701792372] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
OBJECTIVE The endothelin (ET) system is influenced by a variety of stress conditions in many tissues. However, the effects of nutrient stress conditions on ET expression and its function are not well understood in the intestinal tract, while ET-1 gene expression and peptide were found in the intestinal tract. The aim of this study was to investigate the effect of feeding and fasting on the expression of ET-1 and short-circuit current (Isc) induced by ET-1 in mouse colon. MATERIAL AND METHODS Mice were fed freely, fasted for 48 h, and re-fed after fasting, respectively. ET-1 mRNA levels and peptide concentrations were analyzed using real-time polymerase chain reaction (PCR) and sandwich ELISA, respectively. Isc of epithelial tissue was measured under short-circuit conditions using a Ussing chamber. RESULTS ET-1 mRNA expression and peptide concentrations in epithelial colonic tissue were significantly increased 48 h after fasting, and decreased within 2 h of re-feeding after a 48-h fast. Furthermore, the addition of ET-1 to the serosal but not the mucosal side increased Isc in colonic epithelia. An increase in Isc was caused by chloride ion (Cl(-)) secretion because Isc induced by ET-1 was blocked by bumetanide and Cl(- -) free conditions. In addition, an increase in Isc induced by ET-1 in colon excised from fasted mice was much lower than that obtained from free-fed mice. CONCLUSIONS Gene expression, peptide concentration, and the function of ET-1 in mouse colonic epithelia are regulated by nutrient stress.
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Affiliation(s)
- Takaharu Kozakai
- National Institute of Advanced Industrial Science and Technology (AIST), Institute for Biological Resources and Functions, Ibaraki, Japan
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Sanders EJ, Harvey S. Peptide hormones as developmental growth and differentiation factors. Dev Dyn 2008; 237:1537-52. [PMID: 18498096 DOI: 10.1002/dvdy.21573] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Peptide hormones, usually considered to be endocrine factors responsible for communication between tissues remotely located from each other, are increasingly being found to be synthesized in developing tissues, where they act locally. Several hormones are now known to be produced in developing tissues that are unrelated to the endocrine gland of origin in the adult. These hormones are synthesized locally, and are active as differentiation and survival factors, before the developing adult endocrine tissue becomes functional. There is increasing evidence for paracrine and/or autocrine actions for these factors during development, thus, placing them among the conventional growth and differentiation factors. We review the evidence for the view that thyroid hormones, growth hormone, prolactin, insulin, and parathyroid hormone-related protein are developmental growth and differentiation factors.
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Affiliation(s)
- Esmond J Sanders
- Department of Physiology, University of Alberta, Edmonton, Alberta, Canada.
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Sanders EJ, Harvey S. Growth hormone as an early embryonic growth and differentiation factor. ACTA ACUST UNITED AC 2005; 209:1-9. [PMID: 15480774 DOI: 10.1007/s00429-004-0422-1] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
In this review we consider the evidence that growth hormone (GH) acts in the embryo as a local growth, differentiation, and cell survival factor. Because both GH and its receptors are present in the early embryo before the functional differentiation of pituitary somatotrophs and before the establishment of a functioning circulatory system, the conditions are such that GH may be a member of the large battery of autocrine/paracrine growth factors that control embryonic development. It has been clearly established that GH is able to exert direct effects, independent of insulin-like growth factor-I (IGF-I), on the differentiation, proliferation, and survival of cells in a wide variety of tissues in the embryo, fetus, and adult. The signaling pathways behind these effects of GH are now beginning to be determined, establishing early extrapituitary GH as a bona fide developmental growth factor.
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Affiliation(s)
- Esmond J Sanders
- Department of Physiology, University of Alberta, T6G 2H7 Edmonton, Alberta, Canada.
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Hurbin A, Coll JL, Dubrez-Daloz L, Mari B, Auberger P, Brambilla C, Favrot MC. Cooperation of amphiregulin and insulin-like growth factor-1 inhibits Bax- and Bad-mediated apoptosis via a protein kinase C-dependent pathway in non-small cell lung cancer cells. J Biol Chem 2005; 280:19757-67. [PMID: 15767261 PMCID: PMC2685917 DOI: 10.1074/jbc.m413516200] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Amphiregulin (AR) and insulin-like growth factor-1 (IGF1) are growth factors known to promote non-small cell lung cancer (NSCLC) survival. We have previously published that 1) AR and IGF1, secreted by H358 NSCLC cells, cooperate to protect those cells and H322 NSCLC cells from serum-starved apoptosis; 2) H358 cells resist Bax-induced apoptosis through an inhibition of Bax conformational change. We show here that the antiapoptotic activity of the AR/IGF1 combination is specifically abolished by the PKC inhibitors calphostin C and staurosporine, but not by the MAPK and phosphatidylinositol 3-kinase inhibitors PD98059 and wortmannin, suggesting the involvement of a PKC-dependent and MAPK- and phosphatidylinositol 3-kinase-independent survival pathway. The PKCdelta inhibitor rottlerin restores apoptosis induced by serum deprivation. In addition, phosphorylation of PKCdelta and PKCzeta/lambda, but not of PKCalpha/beta(II), increases in serum-starved H358 cells and in H322 cells treated with an AR/IGF1 combination and is blocked by calphostin C. The combination of AR and IGF1 increases p90(rsk) and Bad phosphorylation as well as inhibiting the conformational change of Bax by a PKC-dependent mechanism. Finally, PKCdelta, PKCzeta, or p90(rsk) small interfering RNAs block the antiapoptotic activity of AR/IGF1 combination but have no effect on partial apoptosis inhibition observed with each factor used alone. Constitutively active PKC expression inhibits serum deprivation-induced apoptosis, whereas a catalytically inactive form of p90(rsk) restores it. Thus, AR and IGF1 cooperate to prevent apoptosis by activating a specific PKC-p90(rsk)-dependent pathway, which leads to Bad and Bax inactivation. This signaling pathway is different to that used by single factor.
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Affiliation(s)
- Amandine Hurbin
- Groupe de Recherche Sur Le Cancer du Poumon : Bases Moléculaires de la Progression Tumorale, Dépistage et Thérapie Génique
INSERM : U578Institut Albert BonniotRond Point de La Chantourne
38706 LA TRONCHE CEDEX,FR
| | - Jean-Luc Coll
- Groupe de Recherche Sur Le Cancer du Poumon : Bases Moléculaires de la Progression Tumorale, Dépistage et Thérapie Génique
INSERM : U578Institut Albert BonniotRond Point de La Chantourne
38706 LA TRONCHE CEDEX,FR
| | - Laurence Dubrez-Daloz
- Mort cellulaire et cancer
INSERM : U517IFR100Université de BourgogneFaculte de Medecine
7, Boulevard Jeanne D'Arc
21079 DIJON CEDEX,FR
| | - Bernard Mari
- Physiopathologie de la survie et de la mort cellulaire et infection virale
INSERM : U526IFR50Université de Nice Sophia-AntipolisFaculte de Médecine
28, Avenue de Valombrose
06107 NICE CEDEX 2,FR
| | - Patrick Auberger
- Physiopathologie de la survie et de la mort cellulaire et infection virale
INSERM : U526IFR50Université de Nice Sophia-AntipolisFaculte de Médecine
28, Avenue de Valombrose
06107 NICE CEDEX 2,FR
| | - Christian Brambilla
- Groupe de Recherche Sur Le Cancer du Poumon : Bases Moléculaires de la Progression Tumorale, Dépistage et Thérapie Génique
INSERM : U578Institut Albert BonniotRond Point de La Chantourne
38706 LA TRONCHE CEDEX,FR
| | - Marie-Christine Favrot
- Groupe de Recherche Sur Le Cancer du Poumon : Bases Moléculaires de la Progression Tumorale, Dépistage et Thérapie Génique
INSERM : U578Institut Albert BonniotRond Point de La Chantourne
38706 LA TRONCHE CEDEX,FR
- * Correspondence should be adressed to: Marie-Christine Favrot
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Lafreniere JF, Mills P, Tremblay JP, El Fahime E. GROWTH FACTORS IMPROVE THE IN VIVO MIGRATION OF HUMAN SKELETAL MYOBLASTS BY MODULATING THEIR ENDOGENOUS PROTEOLYTIC ACTIVITY. Transplantation 2004; 77:1741-7. [PMID: 15201676 DOI: 10.1097/01.tp.0000131175.60047.eb] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
BACKGROUND A main technological problem related to the clinical application of myoblast transplantation is the poor migration of transplanted cells. In this study, we investigated a new physiologic approach that consists of coinjecting motogenic factors insulin growth factor (IGF)-1 or basic fibroblast growth factor (bFGF) to enhance the migration of human skeletal myoblasts. Among the different ways by which those factors can induce the cell migration processes, we investigated their capacity to enhance cell endogenous proteolytic activity that will help transplanted cells to migrate through the extracellular matrix. METHODS In vitro, myoblasts were coincubated with bFGF or IGF-1. Growth factors effects on cell migration were evaluated using invasion chambers, and their effects on proteolytic systems were evaluated by zymography, Western blot, and reverse transcription polymerase chain reaction. In vivo, myoblasts were coinjected with growth factors and the intramuscular migration capacity was assessed using the microtube technique. RESULTS In vitro, the presence of IGF-1 or bFGF significantly enhanced the expression of the gelatinase matrix metalloproteinase-9 and focalized the fibrinolytic system activity at the cell membrane. In vitro and in vivo, both bFGF and IGF-1 showed strong chemokinetic potentials and improved the migration of human myoblasts. Moreover, the implication some proteinases in the in vivo enhanced migration was confirmed using specific inhibitors (BB94 or amiloride). CONCLUSIONS These results suggest that IGF-1 or bFGF coinjection with human myoblasts increased their proteolytic activities and consequently their migratory capacity. This study may help to develop approaches that will reduce the number of injection sites for the treatment of Duchenne muscular dystrophy patients.
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Affiliation(s)
- Jean Francois Lafreniere
- Unité de Recherche en Génétique Humaine, Centre Hospitalier de l'Université Laval, Ste-Foy, Québec, Canada
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Millette E, de Champlain J, Lamontagne D. Contribution of endogenous endothelin in the enhanced coronary constriction in DOCA-salt hypertensive rats. J Hypertens 2003; 21:115-23. [PMID: 12544443 DOI: 10.1097/00004872-200301000-00021] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVE The present study was performed to evaluate the hypersensitivity to vasoconstrictors in coronaries from uninephrectomized hypertensive rats (HTR), after a 2-week deoxycorticosterone acetate (DOCA)-salt treatment, in comparison with uninephrectomized age-matched normotensive rats (NTR). DESIGN AND METHODS Coronary resistance was recorded from isolated Langendorff hearts perfused at a constant flow rate. RESULTS Cumulative dose-response curves to vasopressin, angiotensin II and endothelin in HTR showed an enhanced maximal response, in comparison with NTR (P< 0.05). In contrast, the sensitivity to U-46619, a thromboxane-mimetic agonist, was reduced in HTR in comparison with NTR (P< 0.05). In the presence of ET(A)/ET(B)-receptor antagonists, LU-302 872 (10 micromol/l) and PD-142 893 (0.1-1 micromol/l), cumulative dose-response curves to vasopressin and angiotensin II showed a reduced maximal response in HTR compared with NTR (P< 0.05). LU-302 872 did not change the responsiveness to U-46619 in both groups. Perfusion of hearts from NTR with a subpressor concentration of endothelin-1 (10 pmol/l) potentiated the responsiveness to vasopressin and angiotensin II, but not that of U-46619 (P< 0.05). Hypertension did not alter the dose-response curves obtained with phorbol 12-myristate 13-acetate, an activator of protein kinase C, Bay K 8644, a L-type calcium-channel activator, and KCl. Measurement of endothelin release by radioimmunoassay in the coronary effluent, before and during dose-response curves to vasopressin, angiotensin II and U-46619, showed no significant increase by the vasoconstrictors, although basal endogenous endothelin was increased in HTR (P< 0.05). CONCLUSION Two-week DOCA-salt hypertension is associated with enhanced coronary vasoconstrictor effects of endothelin, vasopressin and angiotensin II. An increased basal release of endogenous endothelin in coronaries from HTR, along with an enhanced responsiveness of the coronary smooth muscle to endothelin, may contribute to the potentiated response to vasoconstrictors. L-type calcium-channels and protein kinase C are not involved in this increased coronary reactivity to vasoconstrictors in HTR.
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Affiliation(s)
- Esther Millette
- Groupe de recherche sur le système nerveux autonome, Faculté de pharmacie, Université de Montréal, C.P. 6128, Succ. Centre-Ville, Montréal, Quebec, Canada, H3C 3J7
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