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Szychowski KA, Skóra B. Elastin-derived peptides (EDPs) affect gene and protein expression in human mesenchymal stem cells (hMSCs) - preliminary study. Cytokine 2024; 182:156725. [PMID: 39106575 DOI: 10.1016/j.cyto.2024.156725] [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: 06/07/2024] [Revised: 07/25/2024] [Accepted: 08/01/2024] [Indexed: 08/09/2024]
Abstract
During the aging process, elastin is degraded and the level of elastin-derived peptides (EDPs) successively increases. The main peptide released from elastin during its degradation is a peptide with the VGVAPG sequence. To date, several papers have described that EDPs or elastin-like peptides (ELPs) affect human mesenchymal stem cells (hMSCs) derived from different tissues. Unfortunately, despite the described effect of EDPs or ELPs on the hMSC differentiation process, the mechanism of action of these peptides has not been elucidated. Therefore, the aim of the present study was to evaluate the impact of the VGVAPG and VVGPGA peptides on the hMSC stemness marker and elucidation of the mechanism of action of these peptides. Our data show that both studied peptides (VGVAPG and VVGPGA) act with the involvement of ERK1/2 and c-SRC kinases. However, their mechanism of activation is probably different in hMSCs derived from adipose tissue. Both studied peptides increase the KI67 protein level in hMSCs, but this is not accompanied with cell proliferation. Moreover, the changes in the NANOG and c-MYC protein expression and in the SOX2 and POU5F1 mRNA expression suggest that EDPs reduced the hMSC stemness properties and could initiate cell differentiation. The initiation of differentiation was evidenced by changes in the expression of AhR and PPARγ protein as well as specific genes (ACTB, TUBB3) and proteins (β-actin, RhoA) involved in cytoskeleton remodeling. Our data suggest that the presence of EDPs in tissue can initiate hMSC differentiation into more tissue-specific cells.
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Affiliation(s)
- Konrad A Szychowski
- Department of Biotechnology and Cell Biology, Medical College, University of Information Technology and Management in Rzeszow, St. Sucharskiego 2, 35-225 Rzeszow, Poland.
| | - Bartosz Skóra
- Department of Biotechnology and Cell Biology, Medical College, University of Information Technology and Management in Rzeszow, St. Sucharskiego 2, 35-225 Rzeszow, Poland
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2
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Szychowski KA, Skóra B. Elastin-derived peptides (EDPs) as a potential pro-malignancy factor in human leukemia cell lines. Immunol Res 2024:10.1007/s12026-024-09511-7. [PMID: 38967692 DOI: 10.1007/s12026-024-09511-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2024] [Accepted: 06/23/2024] [Indexed: 07/06/2024]
Abstract
The extracellular matrix (ECM) is currently considered to be an important factor influencing the migration and progression of cancer cells. Therefore, the aim of our study was to investigate the mechanism of action of elastin-derived peptides in cancerous cells derived from the immunological system, i.e., HL-60, K562, and MEG-A2 cell lines. Moreover, an attempt to clarify the involvement of c-SRC kinase in EDP mechanism of action was also undertaken. Our data show that the VGVAPG and VVGPGA peptides are not toxic in the studied cell lines. Moreover, due to the involvement of KI67 and PCNA proteins in the cell cycle and proliferation, we can assume that neither peptide stimulates cell proliferation. Our data suggest that both peptides could initiate the differentiation process in all the studied cell lines. However, due to the different origins (HL-60 and K562-leukemic cell line vs. MEG-A2-megakaryoblastic origin) of the cell lines, the mechanism may differ. The increase in the ELANE mRNA expression noted in our experiments may also suggest enhancement of the migration of the tested cells. However, more research is needed to fully explain the mechanism of action of the VGVAPG and VVGPGA peptides in the HL-60, K562, and MEG-A2 cell lines. HIGHLIGHTS: • VGVAPG and VVGPGA peptides do not affect the metabolic activity of HL-60, K562, and MEG-A2 cells. • mTOR and PPARγ proteins are involved in the mechanism of action of VGVAPG and VVGPGA peptides. • Both peptides may initiate differentiation in HL-60, K562, and MEG-A2 cell lines.
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Affiliation(s)
- Konrad A Szychowski
- Department of Biotechnology and Cell Biology, Medical College, University of Information Technology and Management in Rzeszow, Sucharskiego 2, 35-225, Rzeszow, Poland.
| | - Bartosz Skóra
- Department of Biotechnology and Cell Biology, Medical College, University of Information Technology and Management in Rzeszow, Sucharskiego 2, 35-225, Rzeszow, Poland
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3
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Revert-Ros F, Ventura I, Prieto-Ruiz JA, Hernández-Andreu JM, Revert F. The Versatility of Collagen in Pharmacology: Targeting Collagen, Targeting with Collagen. Int J Mol Sci 2024; 25:6523. [PMID: 38928229 PMCID: PMC11203716 DOI: 10.3390/ijms25126523] [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: 05/08/2024] [Revised: 06/01/2024] [Accepted: 06/08/2024] [Indexed: 06/28/2024] Open
Abstract
Collagen, a versatile family of proteins with 28 members and 44 genes, is pivotal in maintaining tissue integrity and function. It plays a crucial role in physiological processes like wound healing, hemostasis, and pathological conditions such as fibrosis and cancer. Collagen is a target in these processes. Direct methods for collagen modulation include enzymatic breakdown and molecular binding approaches. For instance, Clostridium histolyticum collagenase is effective in treating localized fibrosis. Polypeptides like collagen-binding domains offer promising avenues for tumor-specific immunotherapy and drug delivery. Indirect targeting of collagen involves regulating cellular processes essential for its synthesis and maturation, such as translation regulation and microRNA activity. Enzymes involved in collagen modification, such as prolyl-hydroxylases or lysyl-oxidases, are also indirect therapeutic targets. From another perspective, collagen is also a natural source of drugs. Enzymatic degradation of collagen generates bioactive fragments known as matrikines and matricryptins, which exhibit diverse pharmacological activities. Overall, collagen-derived peptides present significant therapeutic potential beyond tissue repair, offering various strategies for treating fibrosis, cancer, and genetic disorders. Continued research into specific collagen targeting and the application of collagen and its derivatives may lead to the development of novel treatments for a range of pathological conditions.
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Affiliation(s)
| | | | | | | | - Fernando Revert
- Mitochondrial and Molecular Medicine Research Group, Facultad de Medicina y Ciencias de la Salud, Universidad Católica de Valencia San Vicente Mártir, 46001 Valencia, Spain; (F.R.-R.); (I.V.); (J.A.P.-R.); (J.M.H.-A.)
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Fang T, Zhang L, Yin X, Wang Y, Zhang X, Bian X, Jiang X, Yang S, Xue Y. The prognostic marker elastin correlates with epithelial-mesenchymal transition and vimentin-positive fibroblasts in gastric cancer. J Pathol Clin Res 2022; 9:56-72. [PMID: 36226731 PMCID: PMC9732685 DOI: 10.1002/cjp2.298] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Revised: 09/19/2022] [Accepted: 09/27/2022] [Indexed: 11/06/2022]
Abstract
Elastin (ELN) fibers are essential constituents of the tumor microenvironment of gastric cancer (GC). However, few studies have investigated the clinical prognostic significance of ELN in GC. We screened for molecular markers that were highly related to distant metastasis by transcriptome sequencing. The Cancer Genome Atlas (TCGA) and Harbin Medical University (HMU) validation cohorts were used to validate ELN expression and to explore molecular mechanisms. Immunohistochemistry for ELN, vimentin (VIM), and fibroblast activation protein, and elastic fiber-specific staining were used to evaluate the relationship between ELN and prognosis. R studio was used to construct a nomogram prognostic model. In this study, we found that ELN mRNA levels were significantly higher in cancer tissues and were associated with poor prognosis in TCGA and HMU patients. Gene set enrichment analysis showed that ELN was mainly enriched in the epithelial-mesenchymal transition (EMT) pathway. The mRNA expression of ELN was positively correlated with fibroblast molecular markers, especially VIM. For validation, we collected a tissue microarray containing 180 pairs of samples. We found that ELN was positively correlated with VIM expression in cancer tissue but not in paracancerous tissues by immunohistochemistry staining. Univariate and multivariate analyses showed that the expression of ELN and lymph node metastasis rate were independent predictors for overall survival. Moreover, a nomogram model was used to evaluate the risk of death by combining the expression of ELN and lymph node metastasis rate. ELN may play an important role in the progression of GC by regulating EMT and is a useful prognostic indicator in predicting the prognosis of GC.
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Affiliation(s)
- Tianyi Fang
- Department of Gastroenterological SurgeryHarbin Medical University Cancer Hospital, Harbin Medical UniversityHarbinPR China
| | - Lei Zhang
- Department of PathologyHarbin Medical UniversityHarbinPR China
| | - Xin Yin
- Department of Gastroenterological SurgeryHarbin Medical University Cancer Hospital, Harbin Medical UniversityHarbinPR China
| | - Yufei Wang
- Department of Gastroenterological SurgeryHarbin Medical University Cancer Hospital, Harbin Medical UniversityHarbinPR China
| | - Xinghai Zhang
- Department of PathologyHarbin Medical UniversityHarbinPR China
| | - Xiulan Bian
- Department of PathologyHarbin Medical UniversityHarbinPR China
| | - Xinju Jiang
- Department of PathologyHarbin Medical UniversityHarbinPR China
| | - Shuo Yang
- Department of PathologyHarbin Medical UniversityHarbinPR China
| | - Yingwei Xue
- Department of Gastroenterological SurgeryHarbin Medical University Cancer Hospital, Harbin Medical UniversityHarbinPR China
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5
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Navneet S, Rohrer B. Elastin turnover in ocular diseases: A special focus on age-related macular degeneration. Exp Eye Res 2022; 222:109164. [PMID: 35798060 PMCID: PMC9795808 DOI: 10.1016/j.exer.2022.109164] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Revised: 06/08/2022] [Accepted: 06/20/2022] [Indexed: 12/30/2022]
Abstract
The extracellular matrix (ECM) and its turnover play a crucial role in the pathogenesis of several inflammatory diseases, including age-related macular degeneration (AMD). Elastin, a critical protein component of the ECM, not only provides structural and mechanical support to tissues, but also mediates several intracellular and extracellular molecular signaling pathways. Abnormal turnover of elastin has pathological implications. In the eye elastin is a major structural component of Bruch's membrane (BrM), a critical ECM structure separating the retinal pigment epithelium (RPE) from the choriocapillaris. Reduced integrity of macular BrM elastin, increased serum levels of elastin-derived peptides (EDPs), and elevated elastin antibodies have been reported in AMD. Existing reports suggest that elastases, the elastin-degrading enzymes secreted by RPE, infiltrating macrophages or neutrophils could be involved in BrM elastin degradation, thus contributing to AMD pathogenesis. EDPs derived from elastin degradation can increase inflammatory and angiogenic responses in tissues, and the elastin antibodies are shown to play roles in immune cell activity and complement activation. This review summarizes our current understanding on the elastases/elastin fragments-mediated mechanisms of AMD pathogenesis.
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Affiliation(s)
- Soumya Navneet
- Department of Ophthalmology, Medical University of South Carolina, Charleston, SC, USA.
| | - Bärbel Rohrer
- Department of Ophthalmology, Medical University of South Carolina, Charleston, SC, USA; Department of Neurosciences, Medical University of South Carolina, Charleston, SC, USA; Ralph H. Johnson VA Medical Center, Division of Research, Charleston, SC, USA.
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6
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Sugiyama A, Okada M, Otani K, Yamawaki H. [Development of basic research toward clinical application of cleaved fragment of type IV collagen]. Nihon Yakurigaku Zasshi 2021; 156:282-287. [PMID: 34470932 DOI: 10.1254/fpj.21016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Basement membrane is a dense sheet-like extracellular matrix (ECM), which separates cells from surrounding interstitium. Type IV collagen is a major component of basement membrane and three of six α chains (namely α1-α6 chains) form a triple-helix structure. Recently, endogenous bioactive factors called "matricryptins" or "matrikines", which are produced by degrading and cleaving C-terminal domain of type IV collagen, attract attentions as a novel therapeutic target or a candidate for biomarkers. In all type IV collagens, matricryptins called arresten (α1 chain), canstatin (α2), tumstatin (α3), tetrastatin (α4), pentastatin (α5), and hexastatin (α6), have been identified. The type IV collagen-derived matricryptins have been previously studied as new therapeutic targets for neoplastic diseases since they exert anti-angiogenic and/or anti-tumor effects. On the other hand, we have recently demonstrated the cardioprotective effects of matricryptins in addition to the altered expression levels in cardiac diseases. In this review, we introduce the results of fundamental studies for the type IV collagen-derived matricryptins in various diseases, such as neoplastic diseases and cardiac diseases, and discuss the potential clinical application as novel therapeutic agents and biomarkers.
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Affiliation(s)
- Akira Sugiyama
- Laboratory of Veterinary Pharmacology, School of Veterinary Medicine, Kitasato University
| | - Muneyoshi Okada
- Laboratory of Veterinary Pharmacology, School of Veterinary Medicine, Kitasato University
| | - Kosuke Otani
- Laboratory of Veterinary Pharmacology, School of Veterinary Medicine, Kitasato University
| | - Hideyuki Yamawaki
- Laboratory of Veterinary Pharmacology, School of Veterinary Medicine, Kitasato University
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Mutgan AC, Jandl K, Kwapiszewska G. Endothelial Basement Membrane Components and Their Products, Matrikines: Active Drivers of Pulmonary Hypertension? Cells 2020; 9:cells9092029. [PMID: 32899187 PMCID: PMC7563239 DOI: 10.3390/cells9092029] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Revised: 08/27/2020] [Accepted: 08/29/2020] [Indexed: 12/19/2022] Open
Abstract
Pulmonary arterial hypertension (PAH) is a vascular disease that is characterized by elevated pulmonary arterial pressure (PAP) due to progressive vascular remodeling. Extracellular matrix (ECM) deposition in pulmonary arteries (PA) is one of the key features of vascular remodeling. Emerging evidence indicates that the basement membrane (BM), a specialized cluster of ECM proteins underlying the endothelium, may be actively involved in the progression of vascular remodeling. The BM and its steady turnover are pivotal for maintaining appropriate vascular functions. However, the pathologically elevated turnover of BM components leads to an increased release of biologically active short fragments, which are called matrikines. Both BM components and their matrikines can interfere with pivotal biological processes, such as survival, proliferation, adhesion, and migration and thus may actively contribute to endothelial dysfunction. Therefore, in this review, we summarize the emerging role of the BM and its matrikines on the vascular endothelium and further discuss its implications on lung vascular remodeling in pulmonary hypertension.
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Affiliation(s)
- Ayse Ceren Mutgan
- Otto Loewi Research Center, Division of Physiology, Medical University of Graz, 8010 Graz, Austria;
| | - Katharina Jandl
- Ludwig Boltzmann Institute for Lung Vascular Research, 8010 Graz, Austria;
- Otto Loewi Research Center, Division of Pharmacology, Medical University of Graz, 8010 Graz, Austria
| | - Grazyna Kwapiszewska
- Otto Loewi Research Center, Division of Physiology, Medical University of Graz, 8010 Graz, Austria;
- Ludwig Boltzmann Institute for Lung Vascular Research, 8010 Graz, Austria;
- Correspondence:
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8
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Heinz A. Elastases and elastokines: elastin degradation and its significance in health and disease. Crit Rev Biochem Mol Biol 2020; 55:252-273. [PMID: 32530323 DOI: 10.1080/10409238.2020.1768208] [Citation(s) in RCA: 73] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Elastin is an important protein of the extracellular matrix of higher vertebrates, which confers elasticity and resilience to various tissues and organs including lungs, skin, large blood vessels and ligaments. Owing to its unique structure, extensive cross-linking and durability, it does not undergo significant turnover in healthy tissues and has a half-life of more than 70 years. Elastin is not only a structural protein, influencing the architecture and biomechanical properties of the extracellular matrix, but also plays a vital role in various physiological processes. Bioactive elastin peptides termed elastokines - in particular those of the GXXPG motif - occur as a result of proteolytic degradation of elastin and its non-cross-linked precursor tropoelastin and display several biological activities. For instance, they promote angiogenesis or stimulate cell adhesion, chemotaxis, proliferation, protease activation and apoptosis. Elastin-degrading enzymes such as matrix metalloproteinases, serine proteases and cysteine proteases slowly damage elastin over the lifetime of an organism. The destruction of elastin and the biological processes triggered by elastokines favor the development and progression of various pathological conditions including emphysema, chronic obstructive pulmonary disease, atherosclerosis, metabolic syndrome and cancer. This review gives an overview on types of human elastases and their action on human elastin, including the formation, structure and biological activities of elastokines and their role in common biological processes and severe pathological conditions.
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Affiliation(s)
- Andrea Heinz
- Department of Pharmacy, LEO Foundation Center for Cutaneous Drug Delivery, University of Copenhagen, Copenhagen, Denmark
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9
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de Castro Brás LE, Frangogiannis NG. Extracellular matrix-derived peptides in tissue remodeling and fibrosis. Matrix Biol 2020; 91-92:176-187. [PMID: 32438055 DOI: 10.1016/j.matbio.2020.04.006] [Citation(s) in RCA: 51] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Revised: 04/29/2020] [Accepted: 04/29/2020] [Indexed: 12/26/2022]
Abstract
Alterations in the composition of the extracellular matrix (ECM) critically regulate the cellular responses in tissue repair, remodeling, and fibrosis. After injury, proteolytic degradation of ECM generates bioactive ECM fragments, named matricryptins, exposing cryptic sites with actions distinct from the parent molecule. Matricryptins contribute to the regulation of inflammatory, reparative, and fibrogenic cascades through effects on several different cell types both in acute and chronic settings. Fibroblasts play a major role in matricryptin generation not only as the main cellular source of ECM proteins, but also as producers of matrix-degrading proteases. Moreover, several matricryptins exert fibrogenic or reparative actions by modulating fibroblast phenotype and function. This review manuscript focuses on the mechanisms of matricyptin generation in injured and remodeling tissues with an emphasis on fibroblast-matricryptin interactions.
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Affiliation(s)
- Lisandra E de Castro Brás
- The Brody School of Medicine, East Carolina University, Department of Physiology, Greenville 27858 North Carolina.
| | - Nikolaos G Frangogiannis
- The Wilf Family Cardiovascular Research Institute, Department of Medicine (Cardiology), Albert Einstein College of Medicine, Bronx, New York
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10
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Liu S, Li H, Wu S, Li L, Ge R, Cheng CY. NC1-peptide regulates spermatogenesis through changes in cytoskeletal organization mediated by EB1. FASEB J 2020; 34:3105-3128. [PMID: 31909540 DOI: 10.1096/fj.201901968rr] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Revised: 11/20/2019] [Accepted: 12/19/2019] [Indexed: 12/11/2022]
Abstract
During the epithelial cycle of spermatogenesis, different sets of cellular events take place across the seminiferous epithelium in the testis. For instance, remodeling of the blood-testis barrier (BTB) that facilitates the transport of preleptotene spermatocytes across the immunological barrier and the release of sperms at spermiation take place at the opposite ends of the epithelium simultaneously at stage VIII of the epithelial cycle. These cellular events are tightly coordinated via locally produced regulatory biomolecules. Studies have shown that collagen α3 (IV) chains, a major constituent component of the basement membrane, release the non-collagenous (NC) 1 domain, a 28-kDa peptide, designated NC1-peptide, from the C-terminal region, via the action of MMP-9 (matrix metalloproteinase 9). NC1-peptide was found to be capable of inducing BTB remodeling and spermatid release across the epithelium. As such, the NC1-peptide is an endogenously produced biologically active peptide which coordinates these cellular events across the epithelium in stage VIII tubules. Herein, we used an animal model, wherein NC1-peptide cloned into the pCI-neo mammalian expression vector was overexpressed in the testis, to better understanding the molecular mechanism by which NC1-peptide regulated spermatogenic function. It was shown that NC1-peptide induced considerable downregulation on a number of cell polarity and planar cell polarity (PCP) proteins, and studies have shown these polarity and PCP proteins modulate spermatid polarity and adhesion via their effects on microtubule (MT) and F-actin cytoskeletal organization across the epithelium. More important, NC1-peptide exerted its effects by downregulating the expression of microtubule (MT) plus-end tracking protein (+TIP) called EB1 (end-binding protein 1). We cloned the full-length EB1 cDNA for its overexpression in the testis, which was found to block the NC1-peptide-mediated disruptive effects on cytoskeletal organization in Sertoli cell epithelium and pertinent Sertoli cell functions. These findings thus illustrate that NC1-peptide is working in concert with EB1 to support spermatogenesis.
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Affiliation(s)
- Shiwen Liu
- Department of Obstetrics and Gynecology, The Second Affiliated Hospital and Yuying Children's Hospital, Wenzhou Medical University, Wenzhou, China.,The Mary M. Wohlford Laboratory for Male Contraceptive Research, Center for Biomedical Research, Population Council, New York, NY, USA
| | - Huitao Li
- Department of Obstetrics and Gynecology, The Second Affiliated Hospital and Yuying Children's Hospital, Wenzhou Medical University, Wenzhou, China.,The Mary M. Wohlford Laboratory for Male Contraceptive Research, Center for Biomedical Research, Population Council, New York, NY, USA
| | - Siwen Wu
- Department of Obstetrics and Gynecology, The Second Affiliated Hospital and Yuying Children's Hospital, Wenzhou Medical University, Wenzhou, China.,The Mary M. Wohlford Laboratory for Male Contraceptive Research, Center for Biomedical Research, Population Council, New York, NY, USA
| | - Linxi Li
- Department of Obstetrics and Gynecology, The Second Affiliated Hospital and Yuying Children's Hospital, Wenzhou Medical University, Wenzhou, China.,The Mary M. Wohlford Laboratory for Male Contraceptive Research, Center for Biomedical Research, Population Council, New York, NY, USA
| | - Renshan Ge
- Department of Obstetrics and Gynecology, The Second Affiliated Hospital and Yuying Children's Hospital, Wenzhou Medical University, Wenzhou, China
| | - C Yan Cheng
- Department of Obstetrics and Gynecology, The Second Affiliated Hospital and Yuying Children's Hospital, Wenzhou Medical University, Wenzhou, China.,The Mary M. Wohlford Laboratory for Male Contraceptive Research, Center for Biomedical Research, Population Council, New York, NY, USA
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11
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Kisling A, Lust RM, Katwa LC. What is the role of peptide fragments of collagen I and IV in health and disease? Life Sci 2019; 228:30-34. [DOI: 10.1016/j.lfs.2019.04.042] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Revised: 04/10/2019] [Accepted: 04/16/2019] [Indexed: 12/20/2022]
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12
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Tang Y, Zhou X. Antagonistic effects of exogenous Slit2 on VEGF-induced choroidal endothelial cell migration and tube formation. Exp Ther Med 2019; 17:2443-2450. [PMID: 30906431 PMCID: PMC6425150 DOI: 10.3892/etm.2019.7235] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2018] [Accepted: 10/26/2018] [Indexed: 02/06/2023] Open
Abstract
Vascular endothelial growth factor (VEGF) is involved in the pathogenesis of choroidal neovascularization. The aim of the present study was to assess the effects of exogenous slit guidance ligand 2 (Slit2) on VEGF-induced choroidal endothelial cell (CEC) migration and tube formation. The protein and mRNA expression levels of Slit2, roundabout guidance receptor (Robo) 1 and Robo4 in CECs were evaluated by immunocytochemistry and reverse transcription-polymerase chain reaction analyses, respectively. Western blot analysis was used to assess Robo4 protein levels in CECs exposed to increasing concentrations (0, 50, 75, 100, 125 and 150 ng/ml) of exogenous Slit2. The effects of exogenous Slit2 (125 ng/ml) on VEGF-induced CEC migration and tube formation were also examined. CECs expressed Slit2 and Robo4, but lacked Robo1 expression, at the mRNA and protein levels. Robo4 protein expression increased significantly following treatment with 50–150 ng/ml exogenous Slit2. No significant difference in Robo4 protein expression was observed in CECs treated with 125 and 150 ng/ml Slit2. VEGF-induced CEC migration and tube formation were significantly reduced following treatment with 125 ng/ml exogenous Slit2. In conclusion, these results indicate that Robo4 is expressed in CECs. In addition, exogenous Slit2 may regulate Robo4 expression and partially inhibit VEGF-induced CEC migration and tube formation.
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Affiliation(s)
- Yanling Tang
- Department of Ophthalmology, Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, P.R. China
| | - Xiyuan Zhou
- Department of Ophthalmology, Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, P.R. China
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13
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Salesse S, Odoul L, Chazée L, Garbar C, Duca L, Martiny L, Mahmoudi R, Debelle L. Elastin molecular aging promotes MDA-MB-231 breast cancer cell invasiveness. FEBS Open Bio 2018; 8:1395-1404. [PMID: 30186741 PMCID: PMC6120250 DOI: 10.1002/2211-5463.12455] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2018] [Revised: 03/30/2018] [Accepted: 05/15/2018] [Indexed: 01/22/2023] Open
Abstract
Elastin is a long-lived extracellular matrix protein responsible for the structural integrity and function of tissues. Breast cancer elastosis is a complex phenomenon resulting in both the deposition of elastotic masses and the local production of elastin fragments. In invasive human breast cancers, an increase in elastosis is correlated with severity of the disease and age of the patient. Elastin-derived peptides (EDPs) are a hallmark of aging and are matrikines - matrix fragments having the ability to regulate cell physiology. They are known to promote processes linked to tumor progression, but their effects on breast cancer cells remain unexplored. Our data show that EDPs enhance the invasiveness of MDA-MB-231 breast cancer cells through the engagement of matrix metalloproteases 14 and 2. We therefore suggest that elastosis and/or an aged stroma could promote breast cancer cell invasiveness.
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Affiliation(s)
- Stéphanie Salesse
- UMR CNRS/URCA 7369 SFR CAP Santé Faculty of Sciences University of Reims Champagne-Ardenne France
| | - Ludivine Odoul
- UMR CNRS/URCA 7369 SFR CAP Santé Faculty of Sciences University of Reims Champagne-Ardenne France
| | - Lise Chazée
- UMR CNRS/URCA 7369 SFR CAP Santé Faculty of Sciences University of Reims Champagne-Ardenne France
| | - Christian Garbar
- Biopathology Department Institut Jean Godinot-Unicancer Reims France.,DERM-I-C EA7319 Université de Reims Champagne Ardenne France
| | - Laurent Duca
- UMR CNRS/URCA 7369 SFR CAP Santé Faculty of Sciences University of Reims Champagne-Ardenne France
| | - Laurent Martiny
- UMR CNRS/URCA 7369 SFR CAP Santé Faculty of Sciences University of Reims Champagne-Ardenne France
| | - Rachid Mahmoudi
- Faculty of Medicine, EA3797 University of Reims Champagne-Ardenne France.,Department of Geriatrics and Internal Medicine Maison Blanche Hospital Reims University Hospitals France
| | - Laurent Debelle
- UMR CNRS/URCA 7369 SFR CAP Santé Faculty of Sciences University of Reims Champagne-Ardenne France
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14
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Scandolera A, Odoul L, Salesse S, Guillot A, Blaise S, Kawecki C, Maurice P, El Btaouri H, Romier-Crouzet B, Martiny L, Debelle L, Duca L. The Elastin Receptor Complex: A Unique Matricellular Receptor with High Anti-tumoral Potential. Front Pharmacol 2016; 7:32. [PMID: 26973522 PMCID: PMC4777733 DOI: 10.3389/fphar.2016.00032] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2015] [Accepted: 02/03/2016] [Indexed: 12/29/2022] Open
Abstract
Elastin, one of the longest-lived proteins, confers elasticity to tissues with high mechanical constraints. During aging or pathophysiological conditions such as cancer progression, this insoluble polymer of tropoelastin undergoes an important degradation leading to the release of bioactive elastin-derived peptides (EDPs), named elastokines. EDP exhibit several biological functions able to drive tumor development by regulating cell proliferation, invasion, survival, angiogenesis, and matrix metalloproteinase expression in various tumor and stromal cells. Although, several receptors have been suggested to bind elastokines (αvβ3 and αvβ5 integrins, galectin-3), their main receptor remains the elastin receptor complex (ERC). This heterotrimer comprises a peripheral subunit, named elastin binding protein (EBP), associated to the protective protein/cathepsin A (PPCA). The latter is bound to a membrane-associated protein called Neuraminidase-1 (Neu-1). The pro-tumoral effects of elastokines have been linked to their binding onto EBP. Additionally, Neu-1 sialidase activity is essential for their signal transduction. Consistently, EDP-EBP interaction and Neu-1 activity emerge as original anti-tumoral targets. Interestingly, besides its direct involvement in cancer progression, the ERC also regulates diabetes outcome and thrombosis, an important risk factor for cancer development and a vascular process highly increased in patients suffering from cancer. In this review, we will describe ERC and elastokines involvement in cancer development suggesting that this unique receptor would be a promising therapeutic target. We will also discuss the pharmacological concepts aiming at blocking its pro-tumoral activities. Finally, its emerging role in cancer-associated complications and pathologies such as diabetes and thrombotic events will be also considered.
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Affiliation(s)
- Amandine Scandolera
- UMR CNRS/URCA 7369, SFR CAP Santé, Université de Reims Champagne Ardenne, Faculté des Sciences Reims, France
| | - Ludivine Odoul
- UMR CNRS/URCA 7369, SFR CAP Santé, Université de Reims Champagne Ardenne, Faculté des Sciences Reims, France
| | - Stéphanie Salesse
- UMR CNRS/URCA 7369, SFR CAP Santé, Université de Reims Champagne Ardenne, Faculté des Sciences Reims, France
| | - Alexandre Guillot
- UMR CNRS/URCA 7369, SFR CAP Santé, Université de Reims Champagne Ardenne, Faculté des Sciences Reims, France
| | - Sébastien Blaise
- UMR CNRS/URCA 7369, SFR CAP Santé, Université de Reims Champagne Ardenne, Faculté des Sciences Reims, France
| | - Charlotte Kawecki
- UMR CNRS/URCA 7369, SFR CAP Santé, Université de Reims Champagne Ardenne, Faculté des Sciences Reims, France
| | - Pascal Maurice
- UMR CNRS/URCA 7369, SFR CAP Santé, Université de Reims Champagne Ardenne, Faculté des Sciences Reims, France
| | - Hassan El Btaouri
- UMR CNRS/URCA 7369, SFR CAP Santé, Université de Reims Champagne Ardenne, Faculté des Sciences Reims, France
| | - Béatrice Romier-Crouzet
- UMR CNRS/URCA 7369, SFR CAP Santé, Université de Reims Champagne Ardenne, Faculté des Sciences Reims, France
| | - Laurent Martiny
- UMR CNRS/URCA 7369, SFR CAP Santé, Université de Reims Champagne Ardenne, Faculté des Sciences Reims, France
| | - Laurent Debelle
- UMR CNRS/URCA 7369, SFR CAP Santé, Université de Reims Champagne Ardenne, Faculté des Sciences Reims, France
| | - Laurent Duca
- UMR CNRS/URCA 7369, SFR CAP Santé, Université de Reims Champagne Ardenne, Faculté des Sciences Reims, France
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Abstract
Collagens mediate essential hemostasis by maintaining the integrity and stability of the vascular wall. Imbalanced turnover of collagens by uncontrolled formation and/or degradation may result in pathologic conditions such as fibrosis. Thickening of the vessel wall because of accumulation of collagens may lead to arterial occlusion or thrombosis. Thinning of the wall because of collagen degradation or deficiency may lead to rupture of the vessel wall or aneurysm. Preventing excessive hemorrhage or thrombosis relies on collagen-mediated actions. Von Willebrand factor, integrins and glycoprotein VI, as well as clotting factors, can bind collagen to restore normal hemostasis after trauma. This review outlines the essential roles of collagens in mediating hemostasis, with a focus on collagens types I, III, IV, VI, XV, and XVIII.
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Affiliation(s)
| | - N G Kjeld
- Nordic Bioscience A/S, Herlev, Denmark
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16
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Bedal KB, Grässel S, Spanier G, Reichert TE, Bauer RJ. The NC11 domain of human collagen XVI induces vasculogenic mimicry in oral squamous cell carcinoma cells. Carcinogenesis 2015; 36:1429-39. [PMID: 26424749 DOI: 10.1093/carcin/bgv141] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2015] [Accepted: 09/16/2015] [Indexed: 01/18/2023] Open
Abstract
Collagen XVI, a fibril-associated collagen with interrupted triple helix (FACIT) collagen, is involved in oral squamous cell carcinoma (OSCC) and glioblastoma progression. The NC11 domain of collagen XVI has been described previously with a strong implication in physiological processes. We detected the non-collagenous (NC) 11-domain in supernatants of OSCC cells after recombinant expression of full-length collagen XVI and in sera from OSCC patients and healthy individuals. Stable expression of NC11-green fluorescent protein (GFP) fusion protein in OSCC cells initiated proliferation control and block of anchorage-independent growth. Moreover, the NC11 domain triggered the generation of tubular-like net structures on laminin-rich matrix in contrast to mock-GFP control cells and cells expressing full-length collagen XVI. Taqman® quantitative PCR and diaminobenzidine staining in 2D- and 3D cell culture revealed a significantly increased gene and protein expression of VEGFR1, VEGFR2 and uPAR in recombinant NC11-GFP-expressing cells. Specific VEGF receptor inhibition with Axitinib or fetal calf serum heat inactivation prevented formation of tubular-like net structures. Accordantly, NC11-GFP coated culture slides led to an increase of focal adhesion contact formation and the upregulation of VEGFR1 and uPAR in three different non-transfected OSCC cell lines. In summary, we suggest that the NC11 domain of collagen XVI is a potential biomarker for OSCC and triggers vasculogenic mimicry via upregulation of endothelial receptors VEGFR1, VEGFR2 and uPAR in 2D- and 3D OSCC cell culture conditions.
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Affiliation(s)
- Konstanze B Bedal
- Department of Oral and Maxillofacial Surgery, University Hospital Regensburg 93059, 93053 Regensburg, Germany, Centre for Medical Biotechnology, BioPark I 93053, Regensburg, Germany and
| | - Susanne Grässel
- Centre for Medical Biotechnology, BioPark I 93053, Regensburg, Germany and Department of Orthopaedic Surgery, Experimental Orthopaedics, University Hospital Regensburg 93059, Regensburg, Germany
| | - Gerrit Spanier
- Department of Oral and Maxillofacial Surgery, University Hospital Regensburg 93059, 93053 Regensburg, Germany
| | - Torsten E Reichert
- Department of Oral and Maxillofacial Surgery, University Hospital Regensburg 93059, 93053 Regensburg, Germany
| | - Richard J Bauer
- Department of Oral and Maxillofacial Surgery, University Hospital Regensburg 93059, 93053 Regensburg, Germany, Centre for Medical Biotechnology, BioPark I 93053, Regensburg, Germany and
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17
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Ricard-Blum S, Vallet SD. Proteases decode the extracellular matrix cryptome. Biochimie 2015; 122:300-13. [PMID: 26382969 DOI: 10.1016/j.biochi.2015.09.016] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2015] [Accepted: 09/11/2015] [Indexed: 12/24/2022]
Abstract
The extracellular matrix is comprised of 1100 core-matrisome and matrisome-associated proteins and of glycosaminoglycans. This structural scaffold contributes to the organization and mechanical properties of tissues and modulates cell behavior. The extracellular matrix is dynamic and undergoes constant remodeling, which leads to diseases if uncontrolled. Bioactive fragments, called matricryptins, are released from the extracellular proteins by limited proteolysis and have biological activities on their own. They regulate numerous physiological and pathological processes such as angiogenesis, cancer, diabetes, wound healing, fibrosis and infectious diseases and either improve or worsen the course of diseases depending on the matricryptins and on the molecular and biological contexts. Several protease families release matricryptins from core-matrisome and matrisome-associated proteins both in vitro and in vivo. The major proteases, which decrypt the extracellular matrix, are zinc metalloproteinases of the metzincin superfamily (matrixins, adamalysins and astacins), cysteine proteinases and serine proteases. Some matricryptins act as enzyme inhibitors, further connecting protease and matricryptin fates and providing intricate regulation of major physiopathological processes such as angiogenesis and tumorigenesis. They strengthen the role of the extracellular matrix as a key player in tissue failure and core-matrisome and matrisome-associated proteins as important therapeutic targets.
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Affiliation(s)
- Sylvie Ricard-Blum
- UMR 5086 CNRS - Université Lyon 1, 7 Passage du Vercors, 69367 Lyon Cedex 07, France.
| | - Sylvain D Vallet
- UMR 5086 CNRS - Université Lyon 1, 7 Passage du Vercors, 69367 Lyon Cedex 07, France.
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18
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Ricard-Blum S, Salza R. Matricryptins and matrikines: biologically active fragments of the extracellular matrix. Exp Dermatol 2014; 23:457-63. [DOI: 10.1111/exd.12435] [Citation(s) in RCA: 119] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/05/2014] [Indexed: 12/21/2022]
Affiliation(s)
- Sylvie Ricard-Blum
- Institut de Biologie et Chimie des Protéines; UMR 5086 CNRS; Université Lyon 1; Lyon Cedex 07 France
| | - Romain Salza
- Institut de Biologie et Chimie des Protéines; UMR 5086 CNRS; Université Lyon 1; Lyon Cedex 07 France
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19
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Sudhakar YA, Verma RK, Pawar SC. Type IV collagen α1-chain noncollagenous domain blocks MMP-2 activation both in-vitro and in-vivo. Sci Rep 2014; 4:4136. [PMID: 24670518 PMCID: PMC3966261 DOI: 10.1038/srep04136] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2013] [Accepted: 01/09/2014] [Indexed: 12/11/2022] Open
Abstract
α1(IV)NC1 inhibits angiogenesis by regulating MAPK activation, this biological function was partly attributed α1(IV)NC1 binding to α1β1-integrin. However, its potent antiangiogenic activity and the molecular targets of α1(IV)NC1 has not been investigated. In the present study, the regulation of MMP-2 activation by α1(IV)NC1 was evaluated. α1β1-integrin which is required for inhibition of angiogenesis is not playing a role in cellular invasion and inhibition of MMP-2 activation by α1(IV)NC1. We found that α1(IV)NC1 binds the CBD of MMP-2 and forming a stable complex that prevents activation of MMP-2. The antiangiogenic activity of α1(IV)NC1 is mediated, in part, by this binding activity. In addition, up-regulation of TIMP-2 by α1(IV)NC1 led to saturation of MT1-MMP binding sites, which in turn led to inhibition of MMP-2 activation. In-vivo studies using α1-integrin null-mice treated with higher doses of α1(IV)NC1 showed integrin independent inhibition of tumor growth and active-MMP-2, without affecting MMP-9, MMP-7 and angiostatin.
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Affiliation(s)
- Yakkanti Akul Sudhakar
- 1] Cell Signaling Laboratory, Bioscience Division, Center for Cancer and Metabolism, SRI International, Menlo Park, CA 94025, USA [2] Cell Signaling and Tumor Angiogenesis Laboratory, Department of Genetics, Boys Town National Research Hospital, Omaha, NE 68131, USA
| | - Raj Kumar Verma
- Irma Lerma Rangel College of Pharmacy, Texas A&M Health Science Center, Kingsville, Texas 78363, USA
| | - Smita C Pawar
- Department of Genetics, Osmania University, Hyderabad, AP 500007, India
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20
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Verma RK, Gunda V, Pawar SC, Sudhakar YA. Extra cellular matrix derived metabolite regulates angiogenesis by FasL mediated apoptosis. PLoS One 2013; 8:e80555. [PMID: 24324608 PMCID: PMC3851695 DOI: 10.1371/journal.pone.0080555] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2013] [Accepted: 10/14/2013] [Indexed: 12/11/2022] Open
Abstract
Object Antiangiogenic treatments are beginning to give promising outcomes in many vascular diseases including tumor angiogenesis. In this current study the antiangiogenic and pro-apoptotic actions of α1(IV)NC1 and its N- and C- peptides α1S1(IV)NC1, α1S2(IV)NC1 were investigated in-vitro and in-vivo. Study Method Endothelial cells (ECs) were treated with α1(IV)NC1, α1S1(IV)NC1, α1S2(IV)NC1 and in-vitro proliferation, migration, tube formation and apoptotic assays were executed. FasL, Fas, Caspase-8, -3 and PARP activations were studied using immunoblotting analysis using specific antibodies. Also the in-vivo antiangiogenic and pro-apoptotic effects were tested using α1(IV)NC1 in a mice model. Results Like α1(IV)NC1, its N- and C- terminal α1S2(IV)NC1 and α1S1(IV)NC1 domains posses anti-proliferative, pro-apoptotic activity and inhibit ECs migration and tube formation in-vitro. Both α1S1(IV)NC1 and α1S2(IV)NC1 domains promote apoptosis by activating FasL and down stream apoptotic events including activation of caspase-8, -3 and PARP cleavage in a dose dependent manner in-vitro in ECs. Tumors in mice showed apoptotic TUNEL positive microvasculature upon α1(IV)NC1 treatment, indicating inhibition of tumor angiogenesis and tumor growth. Further, the antitumor activity of α1(IV)NC1 was abrogated when caspase-3 inhibitor was used. These results conform additional properties of α1(IV)NC1 as an endogenous angioinhibitor that induces apoptosis in-vitro and in-vivo by activating FasL mediated caspase-3. Significance α1(IV)NC1 and its N- and C- terminal α1S1(IV)NC1 and α1S2(IV)NC1 domains also posses pro-apoptotic and angioinhibitory activity in-vitro and in-vivo. α1(IV)NC1 regulates tumor angiogenesis by activating FasL mediated apoptosis in-vitro and in-vivo. These results demonstrate that α1(IV)NC1 and its peptides inhibit neo-vascular diseases.
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Affiliation(s)
- Raj K. Verma
- Irma Lerma Rangel College of Pharmacy, Texas A&M Health Science Center, Kingsville, Texas, United States of America
| | - Venugopal Gunda
- The Eppley Institute for Cancer and Allied Diseases, University of Nebraska Medical Center, Omaha, Nebraska, United States of America
| | - Smita C. Pawar
- Department of Genetics, Osmania University, Hyderabad, Andhra Pradesh, India
| | - Yakkanti Akul Sudhakar
- Cell Signaling Laboratory, Center for Cancer and Metabolism, Bioscience Division, SRI International, Menlo Park, California, United States of America
- Cell Signaling and Tumor Angiogenesis Laboratory, Department of Genetics, Boys Town National Research Hospital, Omaha, Nebraska, United States of America
- * E-mail:
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21
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Gunda V, Verma RK, Pawar SC, Sudhakar YA. Developments in purification methods for obtaining and evaluation of collagen derived endogenous angioinhibitors. Protein Expr Purif 2013; 94:46-52. [PMID: 24215863 DOI: 10.1016/j.pep.2013.10.021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2013] [Revised: 10/30/2013] [Accepted: 10/31/2013] [Indexed: 10/26/2022]
Abstract
Collagen constitutes one of the vital components of the basement membrane scaffolds. Non-collagenous domains (NC1) derived from collagens exhibit potent anti-angiogenic properties, thus attaining significance in regulation of angiogenesis promoted diseases. Individual NC1 domains essential for anti-angiogenic evaluations are generally obtained through purification of individual non-collagenous domains, which have undergone steady developments for enhancing the yields, purpose of biological evaluations and solubility based on the nature of different NC1 domains. This review focuses on the method developments in obtaining biologically active NC1 domains and for specific evaluations in different scenarios.
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Affiliation(s)
- Venugopal Gunda
- The Eppley Institute for Cancer and Allied Diseases, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Raj K Verma
- Irma Lerma Rangel College of Pharmacy, Texas A&M Health Science Center, 78363, USA
| | - Smita C Pawar
- Department of Genetics, Osmania University, Hyderabad, AP 500007, India
| | - Yakkanti A Sudhakar
- Cell Signaling Laboratory, Center for Cancer and Metabolism, Bioscience Division, SRI International, Menlo Park, CA 94025, USA.
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Gunda V, Sudhakar YA. Regulation of Tumor Angiogenesis and Choroidal Neovascularization by Endogenous Angioinhibitors. ACTA ACUST UNITED AC 2013; 5:417-426. [PMID: 25258675 DOI: 10.4172/1948-5956.1000235] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Angiogenesis is the process of neovascularization from parent blood vessels, which is a prerequisite for many physiological and pathological conditions and is regulated by a balance between endogenous angioinhibitors and angioactivators or angiogenic factors. Imbalance between angioinhibitors and angioactivators is associated with neovascularization capacity during progression of tumor development and Choroidal Neovascularization (CNV). Normalization of pathological angiogenesis is considered as an alternative strategy to prevent the tumor growth in cancer progression or retinal damage in CNV. Various angioinhibitors are being identified and evaluated for their pathological angiogenesis regulation, of which endogenous angioinhibitors are one class derived either from extra cellular matrix or from non-extra cellular matrix of human origin. Endogenous angioinhibitors are gaining much significance as they interact with proliferating endothelial cells by binding to distinct integrins and non-integrin receptors, regulating different intracellular signaling mechanisms leading to inhibition of choroidal neovascularization and tumor growth. This review will focus on endogenous angioinhibitors and their receptor(s) mediated angioinhibitory signaling, which are of major concern in angiogenesis and their clinical and pharmaceutical implications.
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Affiliation(s)
- Venugopal Gunda
- The Eppley Institute for Cancer and Allied Diseases, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Yakkanti A Sudhakar
- Cell Signaling Laboratory, Bioscience Division, Center for Cancer and Metabolism, Stanford Research Institute (SRI) International, Menlo Park, CA 94025, USA
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