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Treccarichi S, Failla P, Vinci M, Musumeci A, Gloria A, Vasta A, Calabrese G, Papa C, Federico C, Saccone S, Calì F. UNC5C: Novel Gene Associated with Psychiatric Disorders Impacts Dysregulation of Axon Guidance Pathways. Genes (Basel) 2024; 15:306. [PMID: 38540364 PMCID: PMC10970690 DOI: 10.3390/genes15030306] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2024] [Revised: 02/23/2024] [Accepted: 02/25/2024] [Indexed: 06/14/2024] Open
Abstract
The UNC-5 family of netrin receptor genes, predominantly expressed in brain tissues, plays a pivotal role in various neuronal processes. Mutations in genes involved in axon development contribute to a wide spectrum of human diseases, including developmental, neuropsychiatric, and neurodegenerative disorders. The NTN1/DCC signaling pathway, interacting with UNC5C, plays a crucial role in central nervous system axon guidance and has been associated with psychiatric disorders during adolescence in humans. Whole-exome sequencing analysis unveiled two compound heterozygous causative mutations within the UNC5C gene in a patient diagnosed with psychiatric disorders. In silico analysis demonstrated that neither of the observed variants affected the allosteric linkage between UNC5C and NTN1. In fact, these mutations are located within crucial cytoplasmic domains, specifically ZU5 and the region required for the netrin-mediated axon repulsion of neuronal growth cones. These domains play a critical role in forming the supramodular protein structure and directly interact with microtubules, thereby ensuring the functionality of the axon repulsion process. We emphasize that these mutations disrupt the aforementioned processes, thereby associating the UNC5C gene with psychiatric disorders for the first time and expanding the number of genes related to psychiatric disorders. Further research is required to validate the correlation of the UNC5C gene with psychiatric disorders, but we suggest including it in the genetic analysis of patients with psychiatric disorders.
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Affiliation(s)
- Simone Treccarichi
- Oasi Research Institute-IRCCS, 94018 Troina, Italy; (S.T.); (P.F.); (M.V.); (A.M.); (A.G.); (A.V.); (G.C.); (C.P.); (F.C.)
| | - Pinella Failla
- Oasi Research Institute-IRCCS, 94018 Troina, Italy; (S.T.); (P.F.); (M.V.); (A.M.); (A.G.); (A.V.); (G.C.); (C.P.); (F.C.)
| | - Mirella Vinci
- Oasi Research Institute-IRCCS, 94018 Troina, Italy; (S.T.); (P.F.); (M.V.); (A.M.); (A.G.); (A.V.); (G.C.); (C.P.); (F.C.)
| | - Antonino Musumeci
- Oasi Research Institute-IRCCS, 94018 Troina, Italy; (S.T.); (P.F.); (M.V.); (A.M.); (A.G.); (A.V.); (G.C.); (C.P.); (F.C.)
| | - Angelo Gloria
- Oasi Research Institute-IRCCS, 94018 Troina, Italy; (S.T.); (P.F.); (M.V.); (A.M.); (A.G.); (A.V.); (G.C.); (C.P.); (F.C.)
| | - Anna Vasta
- Oasi Research Institute-IRCCS, 94018 Troina, Italy; (S.T.); (P.F.); (M.V.); (A.M.); (A.G.); (A.V.); (G.C.); (C.P.); (F.C.)
| | - Giuseppe Calabrese
- Oasi Research Institute-IRCCS, 94018 Troina, Italy; (S.T.); (P.F.); (M.V.); (A.M.); (A.G.); (A.V.); (G.C.); (C.P.); (F.C.)
| | - Carla Papa
- Oasi Research Institute-IRCCS, 94018 Troina, Italy; (S.T.); (P.F.); (M.V.); (A.M.); (A.G.); (A.V.); (G.C.); (C.P.); (F.C.)
| | - Concetta Federico
- Department Biological, Geological and Environmental Sciences, University of Catania, Via Androne 81, 95124 Catania, Italy;
| | - Salvatore Saccone
- Department Biological, Geological and Environmental Sciences, University of Catania, Via Androne 81, 95124 Catania, Italy;
| | - Francesco Calì
- Oasi Research Institute-IRCCS, 94018 Troina, Italy; (S.T.); (P.F.); (M.V.); (A.M.); (A.G.); (A.V.); (G.C.); (C.P.); (F.C.)
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Luo PM, Gu X, Chaney C, Carroll T, Cleaver O. Stromal netrin 1 coordinates renal arteriogenesis and mural cell differentiation. Development 2023; 150:dev201884. [PMID: 37823339 PMCID: PMC10690105 DOI: 10.1242/dev.201884] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Accepted: 10/02/2023] [Indexed: 10/13/2023]
Abstract
The kidney vasculature has a complex architecture that is essential for renal function. The molecular mechanisms that direct development of kidney blood vessels are poorly characterized. We identified a regionally restricted, stroma-derived signaling molecule, netrin 1 (Ntn1), as a regulator of renal vascular patterning in mice. Stromal progenitor (SP)-specific ablation of Ntn1 (Ntn1SPKO) resulted in smaller kidneys with fewer glomeruli, as well as profound defects of the renal artery and transient blood flow disruption. Notably, Ntn1 ablation resulted in loss of arterial vascular smooth muscle cell (vSMC) coverage and in ectopic SMC deposition at the kidney surface. This was accompanied by dramatic reduction of arterial tree branching that perdured postnatally. Transcriptomic analysis of Ntn1SPKO kidneys revealed dysregulation of vSMC differentiation, including downregulation of Klf4, which we find expressed in a subset of SPs. Stromal Klf4 deletion similarly resulted in decreased smooth muscle coverage and arterial branching without, however, the disruption of renal artery patterning and perfusion seen in Ntn1SPKO. These data suggest a stromal Ntn1-Klf4 axis that regulates stromal differentiation and reinforces stromal-derived smooth muscle as a key regulator of renal blood vessel formation.
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Affiliation(s)
- Peter M. Luo
- Department of Molecular Biology, University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd., Dallas, TX 75390, USA
- Center for Regenerative Science and Medicine, University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd., Dallas, TX 75390, USA
| | - Xiaowu Gu
- Department of Molecular Biology, University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd., Dallas, TX 75390, USA
| | - Christopher Chaney
- Department of Molecular Biology, University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd., Dallas, TX 75390, USA
- Center for Regenerative Science and Medicine, University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd., Dallas, TX 75390, USA
- Internal Medicine and Division of Nephrology, University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd., Dallas, TX 75390, USA
| | - Thomas Carroll
- Department of Molecular Biology, University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd., Dallas, TX 75390, USA
- Center for Regenerative Science and Medicine, University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd., Dallas, TX 75390, USA
- Internal Medicine and Division of Nephrology, University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd., Dallas, TX 75390, USA
| | - Ondine Cleaver
- Department of Molecular Biology, University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd., Dallas, TX 75390, USA
- Center for Regenerative Science and Medicine, University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd., Dallas, TX 75390, USA
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Akkermans O, Delloye-Bourgeois C, Peregrina C, Carrasquero-Ordaz M, Kokolaki M, Berbeira-Santana M, Chavent M, Reynaud F, Raj R, Agirre J, Aksu M, White ES, Lowe E, Ben Amar D, Zaballa S, Huo J, Pakos I, McCubbin PTN, Comoletti D, Owens RJ, Robinson CV, Castellani V, Del Toro D, Seiradake E. GPC3-Unc5 receptor complex structure and role in cell migration. Cell 2022; 185:3931-3949.e26. [PMID: 36240740 PMCID: PMC9596381 DOI: 10.1016/j.cell.2022.09.025] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Revised: 07/22/2022] [Accepted: 09/15/2022] [Indexed: 11/09/2022]
Abstract
Neural migration is a critical step during brain development that requires the interactions of cell-surface guidance receptors. Cancer cells often hijack these mechanisms to disseminate. Here, we reveal crystal structures of Uncoordinated-5 receptor D (Unc5D) in complex with morphogen receptor glypican-3 (GPC3), forming an octameric glycoprotein complex. In the complex, four Unc5D molecules pack into an antiparallel bundle, flanked by four GPC3 molecules. Central glycan-glycan interactions are formed by N-linked glycans emanating from GPC3 (N241 in human) and C-mannosylated tryptophans of the Unc5D thrombospondin-like domains. MD simulations, mass spectrometry and structure-based mutants validate the crystallographic data. Anti-GPC3 nanobodies enhance or weaken Unc5-GPC3 binding and, together with mutant proteins, show that Unc5/GPC3 guide migrating pyramidal neurons in the mouse cortex, and cancer cells in an embryonic xenograft neuroblastoma model. The results demonstrate a conserved structural mechanism of cell guidance, where finely balanced Unc5-GPC3 interactions regulate cell migration.
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Affiliation(s)
- Onno Akkermans
- Department of Biochemistry, University of Oxford, Oxford, UK
| | - Céline Delloye-Bourgeois
- MeLis, University of Lyon, Université Claude Bernard Lyon 1, CNRS UMR 5284, INSERM U1314, Institut NeuroMyoGène, 8 avenue Rockefeller 69008 Lyon, Lyon, France
| | - Claudia Peregrina
- Department of Biological Sciences, Institute of Neurosciences, IDIBAPS, CIBERNED, University of Barcelona, Barcelona, Spain
| | - Maria Carrasquero-Ordaz
- Department of Biochemistry, University of Oxford, Oxford, UK; Kavli Institute for Nanoscience Discovery, University of Oxford, Oxford, UK
| | - Maria Kokolaki
- Department of Biochemistry, University of Oxford, Oxford, UK; Kavli Institute for Nanoscience Discovery, University of Oxford, Oxford, UK
| | - Miguel Berbeira-Santana
- Department of Biochemistry, University of Oxford, Oxford, UK; Kavli Institute for Nanoscience Discovery, University of Oxford, Oxford, UK
| | - Matthieu Chavent
- Institut de Pharmacologie et Biologie Structurale, Université de Toulouse, Toulouse, France
| | - Florie Reynaud
- MeLis, University of Lyon, Université Claude Bernard Lyon 1, CNRS UMR 5284, INSERM U1314, Institut NeuroMyoGène, 8 avenue Rockefeller 69008 Lyon, Lyon, France
| | - Ritu Raj
- Department of Chemistry, University of Oxford, Oxford, UK
| | - Jon Agirre
- York Structural Biology Laboratory, Department of Chemistry, University of York, York, UK
| | - Metin Aksu
- Department of Biochemistry, University of Oxford, Oxford, UK
| | - Eleanor S White
- Department of Biochemistry, University of Oxford, Oxford, UK; Kavli Institute for Nanoscience Discovery, University of Oxford, Oxford, UK
| | - Edward Lowe
- Department of Biochemistry, University of Oxford, Oxford, UK
| | - Dounia Ben Amar
- MeLis, University of Lyon, Université Claude Bernard Lyon 1, CNRS UMR 5284, INSERM U1314, Institut NeuroMyoGène, 8 avenue Rockefeller 69008 Lyon, Lyon, France
| | - Sofia Zaballa
- Department of Biological Sciences, Institute of Neurosciences, IDIBAPS, CIBERNED, University of Barcelona, Barcelona, Spain
| | - Jiandong Huo
- Structural Biology, The Rosalind Franklin Institute, Harwell Science Campus, Didcot, UK; Division of Structural Biology, University of Oxford, Oxford, UK
| | - Irene Pakos
- Child Health Institute of New Jersey, New Brunswick, NJ 08901, USA
| | - Patrick T N McCubbin
- Department of Biochemistry, University of Oxford, Oxford, UK; Kavli Institute for Nanoscience Discovery, University of Oxford, Oxford, UK
| | - Davide Comoletti
- Child Health Institute of New Jersey, New Brunswick, NJ 08901, USA; School of Biological Sciences, Victoria University of Wellington, Wellington, New Zealand
| | - Raymond J Owens
- Structural Biology, The Rosalind Franklin Institute, Harwell Science Campus, Didcot, UK; Division of Structural Biology, University of Oxford, Oxford, UK
| | - Carol V Robinson
- Department of Chemistry, University of Oxford, Oxford, UK; Kavli Institute for Nanoscience Discovery, University of Oxford, Oxford, UK
| | - Valérie Castellani
- MeLis, University of Lyon, Université Claude Bernard Lyon 1, CNRS UMR 5284, INSERM U1314, Institut NeuroMyoGène, 8 avenue Rockefeller 69008 Lyon, Lyon, France.
| | - Daniel Del Toro
- Department of Biological Sciences, Institute of Neurosciences, IDIBAPS, CIBERNED, University of Barcelona, Barcelona, Spain.
| | - Elena Seiradake
- Department of Biochemistry, University of Oxford, Oxford, UK; Kavli Institute for Nanoscience Discovery, University of Oxford, Oxford, UK.
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Jiang RC, Zheng XY, Yang SL, Shi HJ, Xi JH, Zou YJ, Dou HQ, Wang YJ, Qin Y, Zhang XL, Xiao Q. CD146 mediates the anti-apoptotic role of Netrin-1 in endothelial progenitor cells under hypoxic conditions. Mol Med Rep 2021; 25:5. [PMID: 34738629 PMCID: PMC8600420 DOI: 10.3892/mmr.2021.12521] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2021] [Accepted: 09/21/2021] [Indexed: 01/18/2023] Open
Abstract
Modulating the biological status of endothelial progenitor cells (EPCs), such as function and survival, is essential for therapeutic angiogenesis in ischemic vascular disease environments. This study aimed to explore the role and molecular mechanisms underlying Netrin-1 in the viability and angiogenic function of EPCs. EPCs were isolated from the bone barrow of adult C57/BL6 mice. The apoptosis and various functions of EPCs were analyzed in vitro by manipulating the expression of Netrin-1. The TUNEL assay was performed to detect apoptotic EPCs. Cell migration and tube formation assays were performed to detect EPC function. Trypan blue staining was performed to detect cell viability. Western blot analysis was performed to detect the protein expression levels of Netrin-1, CD146 and apoptotic factors. Quantitative PCR analysis was performed to detect the expression levels of Netrin-1 receptors. The results demonstrated that treatment with exogenous Netrin-1 promoted EPC migration and tube formation, whereas transfection with small interfering (si)RNA targeting Netrin-1 exhibited the opposite effects. Exogenous Netrin-1 protected EPCs from hypoxia-induced apoptosis, whereas the interruption of endogenous Netrin-1 enhancement under hypoxia by Netrin-1-siRNA exacerbated the apoptosis of EPCs. Furthermore, CD146, one of the immunoglobulin receptors activated by Netrin-1, was screened for in the present study. Results demonstrated that CD146 did not participate in Netrin-1-promoted EPC function, but mediated the anti-apoptotic effects of Netrin-1 in EPCs. In conclusion, Netrin-1 enhanced the angiogenic function of EPCs and alleviated hypoxia-induced apoptosis, which was mediated by CD146. This biological function of Netrin-1 may provide a potential therapeutic option to promote EPCs for the treatment of ischemic vascular diseases.
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Affiliation(s)
- Ru-Chao Jiang
- Key Laboratory of Molecular Target and Clinical Pharmacology, School of Pharmaceutical Sciences and The Fifth Affiliated Hospital, Guangzhou, Guangdong 511436, P.R. China
| | - Xue-Ying Zheng
- Key Laboratory of Molecular Target and Clinical Pharmacology, School of Pharmaceutical Sciences and The Fifth Affiliated Hospital, Guangzhou, Guangdong 511436, P.R. China
| | - Sheng-Lan Yang
- Key Laboratory of Molecular Target and Clinical Pharmacology, School of Pharmaceutical Sciences and The Fifth Affiliated Hospital, Guangzhou, Guangdong 511436, P.R. China
| | - Hai-Jie Shi
- Key Laboratory of Molecular Target and Clinical Pharmacology, School of Pharmaceutical Sciences and The Fifth Affiliated Hospital, Guangzhou, Guangdong 511436, P.R. China
| | - Jia-Hui Xi
- Key Laboratory of Molecular Target and Clinical Pharmacology, School of Pharmaceutical Sciences and The Fifth Affiliated Hospital, Guangzhou, Guangdong 511436, P.R. China
| | - Yong-Jian Zou
- Key Laboratory of Molecular Target and Clinical Pharmacology, School of Pharmaceutical Sciences and The Fifth Affiliated Hospital, Guangzhou, Guangdong 511436, P.R. China
| | - Hua-Qian Dou
- Key Laboratory of Molecular Target and Clinical Pharmacology, School of Pharmaceutical Sciences and The Fifth Affiliated Hospital, Guangzhou, Guangdong 511436, P.R. China
| | - Yun-Jing Wang
- Key Laboratory of Molecular Target and Clinical Pharmacology, School of Pharmaceutical Sciences and The Fifth Affiliated Hospital, Guangzhou, Guangdong 511436, P.R. China
| | - Yuan Qin
- Key Laboratory of Molecular Target and Clinical Pharmacology, School of Pharmaceutical Sciences and The Fifth Affiliated Hospital, Guangzhou, Guangdong 511436, P.R. China
| | - Xiao-Ling Zhang
- Department of Neonatology, Maternal and Children Hospital of Guangdong Province, Guangzhou, Guangdong 510260, P.R. China
| | - Qing Xiao
- Key Laboratory of Molecular Target and Clinical Pharmacology, School of Pharmaceutical Sciences and The Fifth Affiliated Hospital, Guangzhou, Guangdong 511436, P.R. China
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Liu L, Liu KJ, Cao JB, Yang J, Yu HL, He XX, He ZX, Zhu XJ. A Novel Netrin-1-Derived Peptide Enhances Protection against Neuronal Death and Mitigates of Intracerebral Hemorrhage in Mice. Int J Mol Sci 2021; 22:ijms22094829. [PMID: 34063230 PMCID: PMC8125294 DOI: 10.3390/ijms22094829] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Revised: 04/25/2021] [Accepted: 04/29/2021] [Indexed: 12/22/2022] Open
Abstract
It has been reported that Netrin-1 is involved in neuroprotection following injury to the central nervous system. However, the minimal functional domain of Netrin-1 which can preserve the neuroprotection but avoid the major side effects of Netrin remains elusive. Here, we investigated the neuroprotective effect of a peptide E1 derived from Netrin-1′s EGF3 domain (residues 407–422). We found that it interacts with deleted colorectal carcinoma (DCC) to activate focal adhesion kinase phosphorylation exhibiting neuroprotection. The administration of the peptide E1 was able to improve functional recovery through reduced apoptosis in an experimental murine model of intracerebral hemorrhage (ICH). In summary, we reveal a functional sequence of Netrin-1 that is involved in the recovery process after ICH and identify a candidate peptide for the treatment of ICH.
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Chico TJA, Kugler EC. Cerebrovascular development: mechanisms and experimental approaches. Cell Mol Life Sci 2021; 78:4377-4398. [PMID: 33688979 PMCID: PMC8164590 DOI: 10.1007/s00018-021-03790-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Revised: 02/04/2021] [Accepted: 02/12/2021] [Indexed: 12/13/2022]
Abstract
The cerebral vasculature plays a central role in human health and disease and possesses several unique anatomic, functional and molecular characteristics. Despite their importance, the mechanisms that determine cerebrovascular development are less well studied than other vascular territories. This is in part due to limitations of existing models and techniques for visualisation and manipulation of the cerebral vasculature. In this review we summarise the experimental approaches used to study the cerebral vessels and the mechanisms that contribute to their development.
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Affiliation(s)
- Timothy J A Chico
- Department of Infection, Immunity and Cardiovascular Disease, Medical School, University of Sheffield, Beech Hill Road, Sheffield, S10 2RX, UK.
- The Bateson Centre, Firth Court, University of Sheffield, Western Bank, Sheffield, S10 2TN, UK.
- Insigneo Institute for in Silico Medicine, The Pam Liversidge Building, Sheffield, S1 3JD, UK.
| | - Elisabeth C Kugler
- Department of Infection, Immunity and Cardiovascular Disease, Medical School, University of Sheffield, Beech Hill Road, Sheffield, S10 2RX, UK.
- The Bateson Centre, Firth Court, University of Sheffield, Western Bank, Sheffield, S10 2TN, UK.
- Insigneo Institute for in Silico Medicine, The Pam Liversidge Building, Sheffield, S1 3JD, UK.
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Decreased Serum Netrin-1 as a Predictor for Post-Stroke Depression in Chinese Patients with Acute Ischemic Stroke. J Stroke Cerebrovasc Dis 2020; 29:105149. [PMID: 32912541 DOI: 10.1016/j.jstrokecerebrovasdis.2020.105149] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Revised: 07/04/2020] [Accepted: 07/10/2020] [Indexed: 01/06/2023] Open
Abstract
BACKGROUND AND AIMS Experimental studies demonstrated that netrin-1 (NT-1) is an important factor influencing the recovery after ischemic stroke. However, whether NT-1 levels were associated with the post-stroke depression (PSD) remains unclear. We aimed to evaluate the relationship between NT-1 levels and PSD at 3 months in patients with ischemic stroke. METHODS From January 2018 to December 2019, consecutive Chinese patients with first-ever ischemic stroke were prospectively recruited. Serum NT-1 levels were measured at admission. Patients with a 17-item Hamilton Depression Scale score of ≥7 were given the Structured Clinical Interview of the Diagnostic and Statistical Manual of Mental Disorders, 4th edition, for diagnosis of PSD. RESULTS A total of 238 patients (mean age, 62.5 years; 45.4% female) were enrolled. The median NT-1 concentrations were 467.8 pg/mL (interquartile range, 351.8-581.0 pg/mL). During the 3-month follow-up period, 64 patients (26.9%) experienced PSD. Serum NT-1 levels were significantly lower in PSD patients than in patients without PSD (median, 380.3 pg/mL versus 478.5 pg/mL; P = 0.001). After adjusting for demographic characteristic, National Institutes of Health stroke score, and other potential confounders by multiple logistic regression analysis, patients with NT-1 levels in the first quartile were more likely to have 3-month PSD (as compared with the fourth quartile, odds ratio 3.83, 95% confidence intervals, 1.53-9.63, P = 0.004). Similar significant findings were observed when the NT-1 levels were added as a continuous variable. CONCLUSIONS Our data demonstrated that decreased serum NT-1 levels, in a Chinese population, were significantly associated with PSD at 3 months.
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Mutlu H, Akilli N, Cander B, Köylü Ö, Gul M, Köylü R. Effect of Serum Netrin-1 Levels on Diagnosis and Prognosis in Patients Admitted to the Emergency Service for Acute Coronary Syndrome. Cureus 2020; 12:e7741. [PMID: 32455061 PMCID: PMC7241224 DOI: 10.7759/cureus.7741] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Background Netrin-1 is a recently discovered diagnostic biomarker that indicates atherosclerosis, angiogenesis, and ischemia-reperfusion damage. There are no human studies about Netrin-1 in acute coronary syndrome (ACS). The purpose of the present study was to investigate Netrin-1 levels in the early diagnosis and successful reperfusion of ACS. Method The study was conducted with 188 patients diagnosed with ACS and 50 healthy subjects at the emergency unit in a prospective design. Blood samples were collected from the patient group at initial admission and after angiography. The control group consisted of healthy adult subjects without any disease. Netrin-1 levels were studied in both groups. Results The Netrin-1 levels of the patient group at the time of admission were found to be higher than of the control group (p<0.001). In the patient group, netrin-1 levels measured at initial admission (1.53±0.19) and after angiography (1.49±0.19) were determined to be statistically significant (p:0.049). In the patient group, where the Thrombolysis in Myocardial Infarction (TIMI) 3 flow was established after angiography, netrin-1 levels were detected to be low (p:0.039). Netrin-1 levels obtained at the time of admission were determined to be significantly different in the Global Registry of Acute Coronary Events (GRACE) moderate and high-risk groups in comparison to the low-risk group (p:0.017). Conclusion Netrin-1 was shown to increase in the early diagnosis of ACS and to decrease in patients for whom reperfusion was established after angiography. Therefore, Netrin-1 can be an important biomarker as an indicator of diagnosis and successful reperfusion in ACS.
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Affiliation(s)
- Huseyin Mutlu
- Emergency Medicine, Faculty of Medicine, Aksaray University, Aksaray, TUR
| | - Nazire Akilli
- Emergency Medicine, Konya Training and Research Hospital, University of Health Sciences, Konya, TUR
| | - Basar Cander
- Emergency Medicine, Kanuni Sultan Süleyman Training and Research Hospital, University of Health Sciences, Istanbul, TUR
| | - Öznur Köylü
- Biochemistry, Konya Training and Research Hospital, University of Health Sciences, Konya, TUR
| | - Murat Gul
- Cardiology, Aksaray University, Faculty of Medicine, Aksaray, TUR
| | - Ramazan Köylü
- Emergency Medicine, Konya Training and Research Hospital, University of Health Sciences, Konya, TUR
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Lee NG, Jeung IC, Heo SC, Song J, Kim W, Hwang B, Kwon MG, Kim YG, Lee J, Park JG, Shin MG, Cho YL, Son MY, Bae KH, Lee SH, Kim JH, Min JK. Ischemia-induced Netrin-4 promotes neovascularization through endothelial progenitor cell activation via Unc-5 Netrin receptor B. FASEB J 2019; 34:1231-1246. [PMID: 31914695 DOI: 10.1096/fj.201900866rr] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Revised: 10/31/2019] [Accepted: 11/11/2019] [Indexed: 11/11/2022]
Abstract
Endothelial progenitor cells (EPCs) promote neovascularization and tissue repair by migrating to vascular injury sites; therefore, factors that enhance EPC homing to damaged tissues are of interest. Here, we provide evidence of the prominent role of the Netrin-4 (NTN4)-Unc-5 Netrin receptor B (UNC5B) axis in EPC-specific promotion of ischemic neovascularization. Our results showed that NTN4 promoted the proliferation, chemotactic migration, and paracrine effects of small EPCs (SEPCs) and significantly increased the incorporation of large EPCs (LEPCs) into tubule networks. Additionally, NTN4 prominently augmented neovascularization in mice with hindlimb ischemia by increasing the homing of exogenously transplanted EPCs to the ischemic limb and incorporating EPCs into vessels. Moreover, silencing of UNC5B, an NTN4 receptor, abrogated the NTN4-induced cellular activities of SEPCs in vitro and blood-flow recovery and neovascularization in vivo in ischemic muscle by reducing EPC homing and incorporation. These findings suggest NTN4 as an EPC-based therapy for treating angiogenesis-dependent diseases.
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Affiliation(s)
- Na Geum Lee
- Biotherapeutics Translational Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon, South Korea.,Department of Biomolecular Science, KRIBB School of Bioscience, Korea University of Science and Technology, Daejeon, South Korea
| | - In Cheul Jeung
- Department of Obstetrics and Gynecology, College of Medicine, The Catholic University of Korea, Seoul, South Korea
| | - Soon Chul Heo
- Department of Physiology, Pusan National University Yangsan Hospital, Yangsan, South Korea
| | - Jinhoi Song
- Biotherapeutics Translational Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon, South Korea
| | - Wooil Kim
- Biotherapeutics Translational Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon, South Korea.,Department of Biomolecular Science, KRIBB School of Bioscience, Korea University of Science and Technology, Daejeon, South Korea
| | - Byungtae Hwang
- Biotherapeutics Translational Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon, South Korea
| | - Min-Gi Kwon
- Biotherapeutics Translational Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon, South Korea.,Department of Biomolecular Science, KRIBB School of Bioscience, Korea University of Science and Technology, Daejeon, South Korea
| | - Yeon-Gu Kim
- Biotherapeutics Translational Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon, South Korea
| | - Jangwook Lee
- Biotherapeutics Translational Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon, South Korea
| | - Jong-Gil Park
- Biotherapeutics Translational Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon, South Korea
| | - Min-Gyeong Shin
- Biotherapeutics Translational Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon, South Korea
| | - Young-Lai Cho
- Research Center for Metabolic Regulation, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon, South Korea
| | - Mi-Young Son
- Stem Cell Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon, South Korea
| | - Kwang-Hee Bae
- Research Center for Metabolic Regulation, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon, South Korea
| | - Sang-Hyun Lee
- Biotherapeutics Translational Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon, South Korea
| | - Jae Ho Kim
- Department of Physiology, Pusan National University Yangsan Hospital, Yangsan, South Korea
| | - Jeong-Ki Min
- Biotherapeutics Translational Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon, South Korea.,Department of Biomolecular Science, KRIBB School of Bioscience, Korea University of Science and Technology, Daejeon, South Korea
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10
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Tang T, Gao D, Yang X, Hua X, Li S, Sun H. Exogenous Netrin-1 Inhibits Autophagy of Ischemic Brain Tissues and Hypoxic Neurons via PI3K/mTOR Pathway in Ischemic Stroke. J Stroke Cerebrovasc Dis 2019; 28:1338-1345. [PMID: 30797642 DOI: 10.1016/j.jstrokecerebrovasdis.2019.01.032] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2018] [Revised: 01/24/2019] [Accepted: 01/29/2019] [Indexed: 01/18/2023] Open
Abstract
BACKGROUND AND OBJECTIVE Ischemic stroke is a serious disease that endangers human health. How to reduce the damage of neurons in ischemic regions is an urgent problem to be explored. Autophagy is an important pathophysiological process in cerebral ischemia and Netrin-1 is an effective neuroprotective protein. This study aims to investigate the effect of Netrin-1 on autophagy of ischemic brain tissues and hypoxic neurons. METHODS We constructed rat persistent middle cerebral artery occlusion model in vivo and constructed the Oxygen Glucose-Deprivation model in vitro. Rats and cells were treated with or without Netrin-1. Western blot analysis was performed to detect autophagy related proteins LC3B, P62 and pathway related proteins PI3K, p-PI3K, mTOR, p-mTOR. CCK-8 assay was performed to detect the viability of hypoxic neurons. We also performed western-blot analysis and qRT-PCR test to detect levels of Netrin-1 protein and mRNA. RESULTS Autophagy enhanced both in ischemic brain tissues and hypoxic neurons. Netrin-1 inhibited autophagy through PI3K/mTOR pathway both in vivo and in vitro. At the same time, we found that exogenous Netrin-1 can promote the secretion of Netrin-1 protein by neurons themselves, which indicated that Netrin-1 can further amplify the neuroprotective effect through the positive feedback mechanism. CONCLUSIONS Exogenous Netrin-1 alleviates damage of ischemic brain tissues and enhances viability of hypoxic neurons by inhibiting autophagy via PI3K/mTOR pathway. This effect can be amplified by positive feedback mechanism.
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Affiliation(s)
- Tianchi Tang
- Department of Neurosurgery, Affiliated Xinhua Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, 200092, PR China; School of Medicine, Shanghai Jiaotong University, Shanghai, 200092, PR China
| | - Dekun Gao
- Department of Neurosurgery, Affiliated Xinhua Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, 200092, PR China; School of Medicine, Shanghai Jiaotong University, Shanghai, 200092, PR China
| | - Xiaosheng Yang
- Department of Neurosurgery, Affiliated Xinhua Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, 200092, PR China
| | - Xuming Hua
- Department of Neurosurgery, Affiliated Xinhua Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, 200092, PR China
| | - Shiting Li
- Department of Neurosurgery, Affiliated Xinhua Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, 200092, PR China.
| | - Hui Sun
- Department of Neurosurgery, Affiliated Xinhua Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, 200092, PR China.
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11
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Kalani A, Chaturvedi P, Kalani K, Kamat PK, Chaturvedi P. A high methionine, low folate and vitamin B 6/B 12 containing diet can be associated with memory loss by epigenetic silencing of netrin-1. Neural Regen Res 2019; 14:1247-1254. [PMID: 30804256 PMCID: PMC6425846 DOI: 10.4103/1673-5374.251333] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Memory-epigenetics which is the loss of memory due to epigenetic modifications can be due to the silencing of genes involved in cognitive functions and this is the basis of the current study. We hypothesize that a diet containing high methionine and low vitamins can lead to memory impairment by increasing global DNA methylation and therefore, silencing the netrin-1 gene, which encodes the glycoprotein involved in neurogenesis, axonal guidance and maintenance of the synaptic plasticity. Wild type (C57BL/6J) mice were fed with a diet containing excess methionine (1.2%), low-folate (0.08 mg/kg), vitamin B6 (0.01 mg/kg), and B12 (10.4 mg/kg) for 6 weeks. Mice were examined weekly for the long-term memory function, using a passive avoidance test, which determined loss of fear-motivated long-term memory starting from the fourth week of diet. Similarly, an increase in brain %5-methyl cytosine was observed starting from the 4th week of diet in mice. Mice fed with a high methionine, low folate and vitamins containing diet showed a decrease in netrin-1 protein expression and an increase in netrin-1 gene promotor methylation, as determined by methylation-sensitive restriction enzyme-polymerase chain reaction analysis. The increase in methylation of netrin-1 gene was validated by high-resolution melting and sequencing analysis. Furthermore, the association of netrin-1 with memory was established by administering netrin that considerably restored long-term fear motivated memory. Taken together, these results suggest that a diet rich in methionine and lacking in folate and vitamin B6/B12 can induce defects in learning and memory. Furthermore, the data indicates that decrease in netrin-1 expression due to hyper-methylation of its gene can be associated with memory loss. The animal procedures were approved by the Institutional Animal Care and Use Committee, University of Louisville, USA (No. A3586-01) on February 2, 2018.
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Affiliation(s)
- Anuradha Kalani
- Department of Physiology, School of Medicine, University of Louisville, Louisville, KY, USA
| | - Pankaj Chaturvedi
- Department of Physiology, School of Medicine, University of Louisville, Louisville, KY, USA
| | - Komal Kalani
- Medicinal Chemistry Department, CSIR-Central Institute of Medicinal and Aromatic Plants, Lucknow, India; Pharmacology Department and Toxicology, Higuchi Biosciences Center, University of Kansas, Lawrence, KS, USA
| | - Pradip K Kamat
- Department of Physiology, School of Medicine, University of Louisville, Louisville, KY, USA
| | - Poonam Chaturvedi
- Department of Neurology, Dr. Ram Manohar Lohia Institute of Medical Sciences, Lucknow, India
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12
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Seong KM, Coates BS, Sun W, Clark JM, Pittendrigh BR. Changes in Neuronal Signaling and Cell Stress Response Pathways are Associated with a Multigenic Response of Drosophila melanogaster to DDT Selection. Genome Biol Evol 2018; 9:3356-3372. [PMID: 29211847 PMCID: PMC5737697 DOI: 10.1093/gbe/evx252] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/30/2017] [Indexed: 12/11/2022] Open
Abstract
The adaptation of insect populations to insecticidal control is a continual threat to human health and sustainable agricultural practices, but many complex genomic mechanisms involved in this adaption remain poorly understood. This study applied a systems approach to investigate the interconnections between structural and functional variance in response to dichlorodiphenyltrichloroethane (DDT) within the Drosophila melanogaster strain 91-R. Directional selection in 6 selective sweeps coincided with constitutive gene expression differences in DDT resistant flies, including the most highly upregulated transcript, Unc-115 b, which plays a central role in axon guidance, and the most highly downregulated transcript, the angiopoietin-like CG31832, which is involved in directing vascular branching and dendrite outgrowth but likely may be under trans-regulatory control. Direct functions and protein–protein interactions mediated by differentially expressed transcripts control changes in cell migration, signal transduction, and gene regulatory cascades that impact the nervous system. Although changes to cellular stress response pathways involve 8 different cytochrome P450s, stress response, and apoptosis is controlled by a multifacetted regulatory mechanism. These data demonstrate that DDT selection in 91-R may have resulted in genome-wide adaptations that impacts genetic and signal transduction pathways that converge to modify stress response, cell survival, and neurological functions. This study implicates the involvement of a multigenic mechanism in the adaptation to a chemical insecticide, which impact interconnected regulatory cascades. We propose that DDT selection within 91-R might act systemically, wherein pathway interactions function to reinforce the epistatic effects of individual adaptive changes on an additive or nonadditive basis.
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Affiliation(s)
- Keon Mook Seong
- Department of Entomology, Michigan State University, East Lansing, Michigan, USA
| | - Brad S Coates
- Corn Insects & Crop Genetics Research Unit, USDA-ARS, Iowa State University, Ames, Iowa, USA
| | - Weilin Sun
- Department of Entomology, Michigan State University, East Lansing, Michigan, USA
| | - John M Clark
- Department of Veterinary & Animal Science, University of Massachusetts, Amherst, Massachusetts, USA
| | - Barry R Pittendrigh
- Department of Entomology, Michigan State University, East Lansing, Michigan, USA
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13
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Ronca R, Benkheil M, Mitola S, Struyf S, Liekens S. Tumor angiogenesis revisited: Regulators and clinical implications. Med Res Rev 2017. [PMID: 28643862 DOI: 10.1002/med.21452] [Citation(s) in RCA: 124] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Since Judah Folkman hypothesized in 1971 that angiogenesis is required for solid tumor growth, numerous studies have been conducted to unravel the angiogenesis process, analyze its role in primary tumor growth, metastasis and angiogenic diseases, and to develop inhibitors of proangiogenic factors. These studies have led in 2004 to the approval of the first antiangiogenic agent (bevacizumab, a humanized antibody targeting vascular endothelial growth factor) for the treatment of patients with metastatic colorectal cancer. This approval launched great expectations for the use of antiangiogenic therapy for malignant diseases. However, these expectations have not been met and, as knowledge of blood vessel formation accumulates, many of the original paradigms no longer hold. Therefore, the regulators and clinical implications of angiogenesis need to be revisited. In this review, we discuss recently identified angiogenesis mediators and pathways, new concepts that have emerged over the past 10 years, tumor resistance and toxicity associated with the use of currently available antiangiogenic treatment and potentially new targets and/or approaches for malignant and nonmalignant neovascular diseases.
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Affiliation(s)
- Roberto Ronca
- Experimental Oncology and Immunology, Department of Molecular and Translational Medicine, University of Brescia, Brescia, Italy
| | - Mohammed Benkheil
- Laboratory of Virology and Chemotherapy, Rega Institute for Medical Research, Leuven, Belgium
| | - Stefania Mitola
- Experimental Oncology and Immunology, Department of Molecular and Translational Medicine, University of Brescia, Brescia, Italy
| | - Sofie Struyf
- Laboratory of Molecular Immunology, Rega Institute for Medical Research, Leuven, Belgium
| | - Sandra Liekens
- Laboratory of Virology and Chemotherapy, Rega Institute for Medical Research, Leuven, Belgium
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14
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Yang X, Li S, Zhong J, Zhang W, Hua X, Li B, Sun H. CD151 mediates netrin-1-induced angiogenesis through the Src-FAK-Paxillin pathway. J Cell Mol Med 2016; 21:72-80. [PMID: 27558487 PMCID: PMC5192806 DOI: 10.1111/jcmm.12939] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2016] [Accepted: 06/27/2016] [Indexed: 01/05/2023] Open
Abstract
Crosstalk between the nervous and vascular systems is important during development and in response to injury, and the laminin-like axonal guidance protein netrin-1 has been studied for its involvement in angiogenesis and vascular remodelling. In this study, we examined the role of netrin-1 in angiogenesis and explored the underlying mechanisms. The effect of netrin-1 on brain tissues and endothelial cells was examined by immunohistochemistry and western blotting in a middle cerebral artery occlusion model and in human umbilical vein endothelial cells. Cell proliferation and cell cycle progression were assessed by the MTT assay and flow cytometry, and the Transwell and tube formation assays were used to examine endothelial cell motility and function. Netrin-1 up-regulated CD151 and VEGF concomitant with the activation of focal adhesion kinase (FAK), Src and Paxillin in vitro and in vivo and the induction of cell proliferation, migration and tube formation in vitro. Silencing of CD151 abolished the effects of netrin-1 on promoting cell migration and tube formation mediated by the activation of FAK/Src signalling. Netrin-1 promoted angiogenesis in vitro and in vivo by activating the FAK/Src/Paxillin signalling pathway through a mechanism dependent on the expression of the CD151 tetraspanin, suggesting the existence of a netrin-1/FAK/Src/CD151 signalling axis involved in the modulation of angiogenesis.
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Affiliation(s)
- Xiaosheng Yang
- Department of Neurosurgery, XinHua Hospital, Shanghai JiaoTong University School of Medicine, Shanghai, China
| | - Shiting Li
- Department of Neurosurgery, XinHua Hospital, Shanghai JiaoTong University School of Medicine, Shanghai, China
| | - Jun Zhong
- Department of Neurosurgery, XinHua Hospital, Shanghai JiaoTong University School of Medicine, Shanghai, China
| | - Wenchuan Zhang
- Department of Neurosurgery, XinHua Hospital, Shanghai JiaoTong University School of Medicine, Shanghai, China
| | - Xuming Hua
- Department of Neurosurgery, XinHua Hospital, Shanghai JiaoTong University School of Medicine, Shanghai, China
| | - Bin Li
- Department of Neurosurgery, XinHua Hospital, Shanghai JiaoTong University School of Medicine, Shanghai, China
| | - Hui Sun
- Department of Neurosurgery, XinHua Hospital, Shanghai JiaoTong University School of Medicine, Shanghai, China
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15
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Ay E, Marakoğlu K, Kizmaz M, Ünlü A. Evaluation of Netrin-1 Levels and Albuminuria in Patients With Diabetes. J Clin Lab Anal 2016; 30:972-977. [PMID: 27076403 DOI: 10.1002/jcla.21965] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2015] [Revised: 02/09/2016] [Accepted: 02/11/2016] [Indexed: 01/15/2023] Open
Abstract
BACKGROUND Netrin-1 is a diagnostic biomarker that has been identified recently for chronic renal failure (CRF) in animal experiments. Netrin-1 levels in urine have been shown to have increased significantly at the acute kidney damage. Human studies on the relation between the CRF and plasma netrin-1 levels have not been found in the literature. This study aimed to investigate whether plasma netrin-1 levels increased in the early stages of the CRF in diabetic patients. METHODS Plasma samples from healthy volunteers and diabetic patients with and without microalbuminuria were collected after receiving consent. Netrin-1 in plasma was quantified by enzyme-linked immunosorbent assay and the data were analyzed to determine whether plasma netrin-1 correlates significantly with disease progression. RESULT Plasma netrin-1 level in microalbuminuric diabetic patients was significantly higher than in normoalbuminuric diabetic patients and the control group. However, no significant difference between normoalbuminuric patients and control group was determined. Plasma netrin-1 level was significantly associated with albuminuria and estimated glomerular filtration rate, independently of age and sex. CONCLUSION This study supports that plasma netrin-1 level increases significantly when glomerular damage occurs in diabetic nephropathy.
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Affiliation(s)
- Emre Ay
- Department of Family Medicine, Medical Faculty, Selcuk University, Konya, Turkey.
| | - Kamile Marakoğlu
- Department of Family Medicine, Medical Faculty, Selcuk University, Konya, Turkey
| | - Muhammet Kizmaz
- Department of Family Medicine, Medical Faculty, Selcuk University, Konya, Turkey
| | - Ali Ünlü
- Department of Biochemistry, Faculty of Medicine, Selcuk University, Konya, Turkey
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16
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Levy-Strumpf N, Krizus M, Zheng H, Brown L, Culotti JG. The Wnt Frizzled Receptor MOM-5 Regulates the UNC-5 Netrin Receptor through Small GTPase-Dependent Signaling to Determine the Polarity of Migrating Cells. PLoS Genet 2015; 11:e1005446. [PMID: 26292279 PMCID: PMC4546399 DOI: 10.1371/journal.pgen.1005446] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2014] [Accepted: 07/15/2015] [Indexed: 01/28/2023] Open
Abstract
Wnt and Netrin signaling regulate diverse essential functions. Using a genetic approach combined with temporal gene expression analysis, we found a regulatory link between the Wnt receptor MOM-5/Frizzled and the UNC-6/Netrin receptor UNC-5. These two receptors play key roles in guiding cell and axon migrations, including the migration of the C. elegans Distal Tip Cells (DTCs). DTCs migrate post-embryonically in three sequential phases: in the first phase along the Antero-Posterior (A/P) axis, in the second, along the Dorso-Ventral (D/V) axis, and in the third, along the A/P axis. Loss of MOM-5/Frizzled function causes third phase A/P polarity reversals of the migrating DTCs. We show that an over-expression of UNC-5 causes similar DTC A/P polarity reversals and that unc-5 deficits markedly suppress the A/P polarity reversals caused by mutations in mom-5/frizzled. This implicates MOM-5/Frizzled as a negative regulator of unc-5. We provide further evidence that small GTPases mediate MOM-5's regulation of unc-5 such that one outcome of impaired function of small GTPases like CED-10/Rac and MIG-2/RhoG is an increase in unc-5 function. The work presented here demonstrates the existence of cross talk between components of the Netrin and Wnt signaling pathways and provides further insights into the way guidance signaling mechanisms are integrated to orchestrate directed cell migration.
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Affiliation(s)
- Naomi Levy-Strumpf
- Lunenfeld-Tanenbaum Research Institute of Mount Sinai Hospital, Toronto, Ontario, Canada
- * E-mail:
| | - Meghan Krizus
- Lunenfeld-Tanenbaum Research Institute of Mount Sinai Hospital, Toronto, Ontario, Canada
| | - Hong Zheng
- Lunenfeld-Tanenbaum Research Institute of Mount Sinai Hospital, Toronto, Ontario, Canada
| | - Louise Brown
- Lunenfeld-Tanenbaum Research Institute of Mount Sinai Hospital, Toronto, Ontario, Canada
| | - Joseph G. Culotti
- Lunenfeld-Tanenbaum Research Institute of Mount Sinai Hospital, Toronto, Ontario, Canada
- Department of Molecular Genetics, University of Toronto, Toronto, Ontario, Canada
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17
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Han Y, Shao Y, Liu T, Qu YL, Li W, Liu Z. Therapeutic effects of topical netrin-4 inhibits corneal neovascularization in alkali-burn rats. PLoS One 2015; 10:e0122951. [PMID: 25853509 PMCID: PMC4390284 DOI: 10.1371/journal.pone.0122951] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2014] [Accepted: 02/16/2015] [Indexed: 11/19/2022] Open
Abstract
Netrins are secreted molecules involved in axon guidance and angiogenesis. However, the role of netrins in the vasculature remains unclear. Netrin-4 and netrin-1 have been found to be either pro- or antiangiogenic factors. Previously, we found that netrin-1 acts as an anti-angiogenic factor in rats by inhibiting alkali burn-induced corneal neovascularization. Here, we further investigate the effects of netrin-4, another member of the same netrin family, on neovascularization in vitro and in vivo. We found that netrin-4 functions similarly as netrin-1 in angiogenesis. In vitro angiogenesis assay shows that netrin-4 affected human umbilical vein endothelial cell (HUVEC) tube formation, viability and proliferation, apoptosis, migration, and invasion in a dose-dependent manner. Netrin-4 was topically applied in vivo to alkali-burned rat corneas on day 0 (immediately after injury) and/or day 10 post-injury. Netrin-4 subsequently suppressed and reversed corneal neovascularization. Netrin-4 inhibited corneal epithelial and stromal cell apoptosis, inhibited vascular endothelial growth factor (VEGF), but promoted pigment epithelium-derived factor (PEDF) expression, decreased NK-KB p65 expression, and inhibits neutrophil and macrophage infiltration. These results indicate that netrin-4 shed new light on its potential roles in treatmenting for angiogenic diseases that affect the ocular surface, as well as other tissues.
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Affiliation(s)
- Yun Han
- Eye Institute of Xiamen University, Xiamen, Fujian, China
- Fujian Provincial Key Laboratory of Ophthalmology and Visual Science, Xiamen, Fujian, China
| | - Yi Shao
- Department of Ophthalmology, the First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, China
| | - Tingting Liu
- Eye Institute of Xiamen University, Xiamen, Fujian, China
- Fujian Provincial Key Laboratory of Ophthalmology and Visual Science, Xiamen, Fujian, China
| | - Yang-Luowa Qu
- Eye Institute of Xiamen University, Xiamen, Fujian, China
- Fujian Provincial Key Laboratory of Ophthalmology and Visual Science, Xiamen, Fujian, China
| | - Wei Li
- Eye Institute of Xiamen University, Xiamen, Fujian, China
- Fujian Provincial Key Laboratory of Ophthalmology and Visual Science, Xiamen, Fujian, China
| | - Zuguo Liu
- Eye Institute of Xiamen University, Xiamen, Fujian, China
- Fujian Provincial Key Laboratory of Ophthalmology and Visual Science, Xiamen, Fujian, China
- * E-mail:
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18
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Hoying JB, Utzinger U, Weiss JA. Formation of microvascular networks: role of stromal interactions directing angiogenic growth. Microcirculation 2015; 21:278-89. [PMID: 24447042 PMCID: PMC4032604 DOI: 10.1111/micc.12115] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2013] [Accepted: 01/16/2014] [Indexed: 12/29/2022]
Abstract
In the adult, angiogenesis leads to an expanded microvascular network as new vessel segments are added to an existing microcirculation. Necessarily, growing neovessels must navigate through tissue stroma as they locate and grow toward other vessel elements. We have a growing body of evidence demonstrating that angiogenic neovessels reciprocally interact with the interstitial matrix of the stroma resulting in directed neovascular growth during angiogenesis. Given the compliance and the viscoelastic properties of collagen, neovessel guidance by the stroma is likely due to compressive strain transverse to the direction of primary tensile forces present during active tissue deformation. Similar stromal strains control the final network topology of the new microcirculation, including the distribution of arterioles, capillaries, and venules. In this case, stromal-derived stimuli must be present during the post-angiogenesis remodeling and maturation phases of neovascularization to have this effect. Interestingly, the preexisting organization of vessels prior to the start of angiogenesis has no lasting influence on the final, new network architecture. Combined, the evidence describes interplay between angiogenic neovessels and stroma that is important in directed neovessel growth and invasion. This dynamic is also likely a mechanism by which global tissue forces influence vascular form and function.
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Affiliation(s)
- James B Hoying
- Cardiovascular Innovation Institute, University of Louisville, Louisville, Kentucky, USA
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19
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Arnold TD, Niaudet C, Pang MF, Siegenthaler J, Gaengel K, Jung B, Ferrero GM, Mukouyama YS, Fuxe J, Akhurst R, Betsholtz C, Sheppard D, Reichardt LF. Excessive vascular sprouting underlies cerebral hemorrhage in mice lacking αVβ8-TGFβ signaling in the brain. Development 2014; 141:4489-99. [PMID: 25406396 DOI: 10.1242/dev.107193] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Vascular development of the central nervous system and blood-brain barrier (BBB) induction are closely linked processes. The role of factors that promote endothelial sprouting and vascular leak, such as vascular endothelial growth factor A, are well described, but the factors that suppress angiogenic sprouting and their impact on the BBB are poorly understood. Here, we show that integrin αVβ8 activates angiosuppressive TGFβ gradients in the brain, which inhibit endothelial cell sprouting. Loss of αVβ8 in the brain or downstream TGFβ1-TGFBR2-ALK5-Smad3 signaling in endothelial cells increases vascular sprouting, branching and proliferation, leading to vascular dysplasia and hemorrhage. Importantly, BBB function in Itgb8 mutants is intact during early stages of vascular dysgenesis before hemorrhage. By contrast, Pdgfb(ret/ret) mice, which exhibit severe BBB disruption and vascular leak due to pericyte deficiency, have comparatively normal vascular morphogenesis and do not exhibit brain hemorrhage. Our data therefore suggest that abnormal vascular sprouting and patterning, not BBB dysfunction, underlie developmental cerebral hemorrhage.
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Affiliation(s)
- Thomas D Arnold
- Department of Pediatrics, University of California, San Francisco, San Francisco, CA 94158, USA Department of Medical Biochemistry and Biophysics, Karolinska Institutet, SE-177 77 Stockholm, Sweden
| | - Colin Niaudet
- Department of Medical Biochemistry and Biophysics, Karolinska Institutet, SE-177 77 Stockholm, Sweden
| | - Mei-Fong Pang
- Department of Medical Biochemistry and Biophysics, Karolinska Institutet, SE-177 77 Stockholm, Sweden
| | - Julie Siegenthaler
- Department of Neurology, University of California, San Francisco, San Francisco, CA 94158, USA
| | - Konstantin Gaengel
- Department of Medical Biochemistry and Biophysics, Karolinska Institutet, SE-177 77 Stockholm, Sweden
| | - Bongnam Jung
- Department of Medical Biochemistry and Biophysics, Karolinska Institutet, SE-177 77 Stockholm, Sweden
| | - Gina M Ferrero
- Department of Physiology and Neuroscience Program, University of California, San Francisco, San Francisco, CA 94158, USA
| | - Yoh-suke Mukouyama
- Laboratory of Stem Cell and Neuro-Vascular Biology, National Heart, Lung, and Blood Institute, NIH, Bethesda, MD 20892, USA
| | - Jonas Fuxe
- Department of Medical Biochemistry and Biophysics, Karolinska Institutet, SE-177 77 Stockholm, Sweden
| | - Rosemary Akhurst
- Helen Diller Cancer Center and Department of Anatomy, University of California, San Francisco, San Francisco, CA 94158, USA
| | - Christer Betsholtz
- Department of Medical Biochemistry and Biophysics, Karolinska Institutet, SE-177 77 Stockholm, Sweden
| | - Dean Sheppard
- Department of Medicine, University of California, San Francisco, San Francisco, CA 94158, USA
| | - Louis F Reichardt
- Department of Physiology and Neuroscience Program, University of California, San Francisco, San Francisco, CA 94158, USA
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20
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Chen DB, Zheng J. Regulation of placental angiogenesis. Microcirculation 2014; 21:15-25. [PMID: 23981199 DOI: 10.1111/micc.12093] [Citation(s) in RCA: 120] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2013] [Accepted: 08/21/2013] [Indexed: 12/13/2022]
Abstract
Ample interest has been evoked in using placental angiogenesis as a target for the development of diagnosis tools and potential therapeutics for pregnancy complications based on the knowledge of placental angiogenesis in normal and aberrant pregnancies. Although these goals are still far from reach, one would expect that two complementary processes should be balanced for therapeutic angiogenesis to be successful in restoring a mature and functional vascular network in the placenta in any pregnancy complication: (i) pro-angiogenic stimulation of new vessel growth and (ii) anti-angiogenic inhibition of vessel overgrowth. As the best model of physiological angiogenesis, investigations of placental angiogenesis provide critical insights not only for better understanding of normal placental endothelial biology but also for the development of diagnosis tools for pregnancy complications. Such investigations will potentially identify novel pro-angiogenic factors for therapeutic intervention for tissue damage in various obstetric complications or heart failure or anti-angiogenic factors to target on cancer or vision loss in which circulation needs to be constrained. This review summarizes the genetic and molecular aspects of normal placental angiogenesis as well as the signaling mechanisms by which the dominant angiogenic factor vascular endothelial growth factor regulates placental angiogenesis with a focus on placental endothelial cells.
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Affiliation(s)
- Dong-Bao Chen
- Department of Obstetrics & Gynecology, University of California, Irvine, California, USA
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21
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Abstract
Vascular endothelial growth factor (VEGF)-VEGF receptor (VEGFR) system has been shown to play central roles not only in physiological angiogenesis, but also in pathological angiogenesis in diseases such as cancer. Based on these findings, a variety of anti-angiogenic drugs, including anti-VEGF antibodies and VEGFR/multi-receptor kinase inhibitors have been developed and approved for the clinical use. While the clinical efficacy of these drugs has been clearly demonstrated in cancer patients, they have not been shown to be effective in curing cancer, suggesting that further improvement in their design is necessary. Abnormal expression of an endogenous VEGF-inhibitor sFlt-1 has been shown to be involved in a variety of diseases, such as preeclampsia and aged macular degeneration. In addition, various factors modulating angiogenic processes have been recently isolated. Given this complexity then, extensive studies on the interrelationship between VEGF signals and other angiogenesis-regulatory systems will be important for developing future strategies to suppress diseases with an angiogenic component.
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Affiliation(s)
- Masabumi Shibuya
- Jobu University, Director, Institute of Physiology and Medicine, Gunma 372-8588 ; Tokyo Medical and Dental University, Department of Molecular Oncology, Tokyo 113-8519 ; University of Tokyo, Tokyo 108-8639, Japan
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Lejmi E, Bouras I, Camelo S, Roumieux M, Minet N, Leré-Déan C, Merkulova-Rainon T, Autret G, Vayssettes C, Clement O, Plouët J, Leconte L. Netrin-4 promotes mural cell adhesion and recruitment to endothelial cells. Vasc Cell 2014; 6:1. [PMID: 24472220 PMCID: PMC3909532 DOI: 10.1186/2045-824x-6-1] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2013] [Accepted: 01/14/2014] [Indexed: 01/08/2023] Open
Abstract
Netrins are secreted molecules involved in axon guidance and angiogenesis. We previously showed that Netrin-4 acts as an anti-angiogenic factor by inhibiting endothelial cell (EC) functions. In this study, we investigated the effects of Netrin-4 on vascular smooth muscle cell (VSMC) activity in vitro and in vivo. We show that exogenous Netrin-4 stimulated VSMC adhesion and migration, and increased their coverage on EC tubes (grown on a Matrigel substrate). siRNA knock-down of endogenous Netrin-4 expression in VSMC decreased their recruitment to EC tubes. VSMC expressed Netrin-4 and three of the six Netrin-1 cognate receptors: DCC, Neogenin, and Unc5B. Silencing of these receptors reduced Netrin-4 adhesion to VSMC, strongly suggesting that these receptors were involved in the recruitment process. We previously showed that Netrin-4 overexpression in PC3 cancer cells delayed tumor growth in a model of subcutaneous xenograft by reducing tumor vessel density. Here, we show that Netrin-4 overexpression improved tumor blood vessel structure and increased VSMC coverage. Thus, Netrin-4 induced mural cell recruitment may play a role in the inhibition of tumor growth. Our data suggest that Netrin-4 is important for blood vessel normalization through the regulation of both endothelial and perivascular cells.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | - Laurence Leconte
- Present address: SISENE, Pépinière Paris Santé Cochin, 29 rue du Faubourg Saint Jacques, Paris 75014, France.
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LeBlanc AJ, Krishnan L, Sullivan CJ, Williams SK, Hoying JB. Microvascular repair: post-angiogenesis vascular dynamics. Microcirculation 2013; 19:676-95. [PMID: 22734666 DOI: 10.1111/j.1549-8719.2012.00207.x] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Vascular compromise and the accompanying perfusion deficits cause or complicate a large array of disease conditions and treatment failures. This has prompted the exploration of therapeutic strategies to repair or regenerate vasculatures, thereby establishing more competent microcirculatory beds. Growing evidence indicates that an increase in vessel numbers within a tissue does not necessarily promote an increase in tissue perfusion. Effective regeneration of a microcirculation entails the integration of new stable microvessel segments into the network via neovascularization. Beginning with angiogenesis, neovascularization entails an integrated series of vascular activities leading to the formation of a new mature microcirculation, and includes vascular guidance and inosculation, vessel maturation, pruning, AV specification, network patterning, structural adaptation, intussusception, and microvascular stabilization. While the generation of new vessel segments is necessary to expand a network, without the concomitant neovessel remodeling and adaptation processes intrinsic to microvascular network formation, these additional vessel segments give rise to a dysfunctional microcirculation. While many of the mechanisms regulating angiogenesis have been detailed, a thorough understanding of the mechanisms driving post-angiogenesis activities specific to neovascularization has yet to be fully realized, but is necessary to develop effective therapeutic strategies for repairing compromised microcirculations as a means to treat disease.
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Affiliation(s)
- Amanda J LeBlanc
- Cardiovascular Innovation Institute, Jewish Hospital and St. Mary's Healthcare and University of Louisville, Louisville, Kentucky 40202, USA
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24
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Scher MS. Normal and abnormal cerebrovascular development. HANDBOOK OF CLINICAL NEUROLOGY 2013; 112:1021-42. [DOI: 10.1016/b978-0-444-52910-7.00021-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
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Lange J, Yafai Y, Noack A, Yang XM, Munk AB, Krohn S, Iandiev I, Wiedemann P, Reichenbach A, Eichler W. The axon guidance molecule Netrin-4 is expressed by Müller cells and contributes to angiogenesis in the retina. Glia 2012; 60:1567-78. [DOI: 10.1002/glia.22376] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2012] [Accepted: 06/05/2012] [Indexed: 01/20/2023]
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26
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Eveno C, Le Henaff C, Audollent R, Soyer P, Rampanou A, Nemeth J, Brouland JP, Dupuy E, Pocard M, Bonnin P. Tumor and non-tumor liver angiogenesis is traced and evaluated by hepatic arterial ultrasound in murine models. ULTRASOUND IN MEDICINE & BIOLOGY 2012; 38:1195-1204. [PMID: 22542260 DOI: 10.1016/j.ultrasmedbio.2012.03.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2011] [Revised: 02/22/2012] [Accepted: 03/04/2012] [Indexed: 05/31/2023]
Abstract
We studied the relationships between hepatic and mesenteric mean blood-flow velocities (mBFVs) measured by ultrasound imaging and (1) downstream tumor angiogenesis during liver metastasis induced by spleen injection of LS174 human colon cells overexpressing the antiangiogenic Netrin4 (LS174-NT4) or not (LS174-WT) and (2) downstream normal angiogenesis during hepatic regeneration after 50% hepatectomy. Liver volume and mBFVs were measured before and after surgery, at day 30 in the first model and at days 2, 7 and 16 in the second model. LS174-NT-4 vs. LS174-WT mice presented fewer metastases (25% vs. 90%, p < 0.001) and decreased hepatic mBFVs (16.5 ± 0.8 vs. 21.8 ± 1.4 cm s(-1), p < 0.01), without difference in mesenteric mBFVs. After partial hepatectomy, hepatic and mesenteric mBFVs increased at day 7, from 12.4 ± 1.7 and 11.8 ± 2.6 to 19.1 ± 1.8 and 17.5 ± 2.4 cm s(-1), respectively, (p < 0.01) then returned to baseline as liver volume. Duplex Doppler ultrasonography reliably assesses normal or tumor angiogenesis and may provide follow-up functional evaluation.
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Affiliation(s)
- Clarisse Eveno
- Université Paris-Diderot, Sorbonne Paris Cité, INSERM, UMR-S 965, Paris, France
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27
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Lu H, Wang Y, He X, Yuan F, Lin X, Xie B, Tang G, Huang J, Tang Y, Jin K, Chen S, Yang GY. Netrin-1 hyperexpression in mouse brain promotes angiogenesis and long-term neurological recovery after transient focal ischemia. Stroke 2012; 43:838-43. [PMID: 22223243 DOI: 10.1161/strokeaha.111.635235] [Citation(s) in RCA: 88] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
BACKGROUND AND PURPOSE Netrin-1 (NT-1) stimulates endothelial cell proliferation and migration in vitro and promotes focal neovascularization in the adult brain in vivo. This in vivo study in mice investigated the effect of NT-1 hyperexpression on focal angiogenesis and long-term functional outcome after transient middle cerebral artery occlusion (tMCAO). METHODS Adeno-associated viral vectors carrying either the NT-1 gene (AAV-NT-1) or GFP (AAV-GFP) were generated and injected into the brains of separate groups of 93 mice. Seven days later, tMCAO followed by 7-28 days of reperfusion were carried out. Histological outcomes and behavioral deficits were quantified 7-28 days after tMCAO. Small cerebral vessel network and angiogenesis were assessed 28 days after tMCAO, using synchrotron radiation microangiography and immunohistochemistry. RESULTS Western blot and immunohistochemistry showed that on the day of tMCAO, NT-1 hyperexpression had been achieved in both normal and ischemic hemispheres. Immunofluorescence imaging showed that NT-1 expression was primarily in neurons and astrocytes. Ischemia-induced infarction in the NT-1 hyperexpression group was attenuated in comparison to saline or AAV-GFP-treated groups (P<0.01). Similarly, neurological deficits were greatly improved in AAV-NT-1-treated mice compared with mice in saline or AAV-GFP-treated groups (P<0.05). In addition, angiogenesis was increased in AAV-NT-1-treated mice compared with the other 2 groups (P<0.05). In vivo synchrotron radiation microangiography 28 days after tMCAO revealed more branches in AAV-NT-1-treated mice than in other groups. CONCLUSIONS AAV-NT-1 induced NT-1 hyperexpression before tMCAO reduced infarct size, enhanced neovascularization, and improved long-term functional recovery.
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Affiliation(s)
- Haiyan Lu
- Department of Neurology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200030, China
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Scher MS. Developmental origins of cerebrovascular disease I: prenatal cerebrovascular development--classic findings in the context of advances in genetic and fetal surveillance evaluations. J Child Neurol 2012; 27:121-31. [PMID: 22180567 DOI: 10.1177/0883073811417714] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Developmental origins of cerebrovascular disease should synchronize neuroscience advances with classic neurodevelopmental principles, as discussed in part 1 of this review. The ontogenetic interplay of nature and nurture influencing cerebrovascular development during the prenatal and early postnatal time periods should be considered when designing neuroprotective strategies, as discussed in part 2. Appreciation of adaptive and maladaptive effects of developmental neuroplasticity requires a systems biology approach that integrates molecular, receptor, cellular, neural network, and behavioral perspectives into structural and functional cerebrovascular phenotypes that express health or disease. Cognizance of the interrelationships among maternal, placental, fetal, and neonatal factors requires an interdisciplinary appreciation of genetic/epigenetic forces affecting neuroplasticity during early life, with later life effects. Knowledge of the multi-organ influences on cerebrovascular development broadens the systems biology perspective. Studies of positive and negative effects of neuroplasticity during early life must then consider ongoing gene-environment interactions during childhood and adulthood that either sustain neurologic health or contribute to disease.
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Affiliation(s)
- Mark S Scher
- School of Medicine, Case Western Reserve University, and Division of Pediatric Neurology, Fetal/Neonatal Neurology Program, Rainbow Babies and Children's Hospital, Case Medical Center, University Hospitals of Cleveland, Cleveland, OH, USA.
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Xu H, Liu J, Xiong S, Le YZ, Xia X. Suppression of retinal neovascularization by lentivirus-mediated netrin-1 small hairpin RNA. Ophthalmic Res 2011; 47:163-9. [PMID: 22122983 DOI: 10.1159/000331428] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2011] [Accepted: 07/26/2011] [Indexed: 02/02/2023]
Abstract
OBJECTIVES The function of netrin-1 in pathological angiogenesis and its role in retinal neovascularization were investigated in the retinas of oxygen-induced retinopathy (OIR) mice by inhibition of netrin-1. METHODS Expression of netrin-1 mRNA and protein in the retinas of OIR mice was analyzed by quantitative RT-PCR and immunoblotting. Inhibition of retinal neovascularization was achieved by lentivirus-mediated netrin-1 small hairpin RNA (shRNA) infection. Retinal neovascularization was examined by fluorescein angiography and quantification of preretinal neovascular nuclei in retinal sections. RESULTS Both mRNA and protein expression of netrin-1 were significantly upregulated in postnatal day 17 OIR mouse retinas. Treatment of OIR mice with specific lentivirus-mediated netrin-1 shRNA dramatically reduced neovascular outgrowth into the inner limiting membrane. Neovascular tufts and nonperfused areas were also reduced. CONCLUSIONS High expression of netrin-1 was detected in the retina under ischemic conditions and played a significant role in pathological retinal angiogenesis. Therefore, netrin-1 represents a potential therapeutic target for diabetic retinopathy, retinopathy of prematurity and other ocular neovascular diseases.
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Affiliation(s)
- Huizhuo Xu
- Department of Ophthalmology, Xiangya Hospital, Central South University, Changsha, China
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30
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Durrani S, Haider KH, Ahmed RPH, Jiang S, Ashraf M. Cytoprotective and proangiogenic activity of ex-vivo netrin-1 transgene overexpression protects the heart against ischemia/reperfusion injury. Stem Cells Dev 2011; 21:1769-78. [PMID: 21936706 DOI: 10.1089/scd.2011.0475] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
In continuation of a previous work that transgene expression of sonic hedgehog promoted neo-vascularization via netrin-1 release, the current study was aimed at assessing the anti-apoptotic and pro-angiogenic role of netrin-1 transgene overexpression in the ischemic myocardium. pLP-Adeno-X ViralTrak vectors containing netrin-1 cDNA amplified from rat mesenchymal stem cells (Ad-netrin) or without a therapeutic gene (Ad-null) were constructed and transfected into HEK-293 cells to produce Ad-netrin and Ad-null vectors. Sca-1(+)-like cells were isolated and propagated in vitro and were successfully transduced with Ad-netrin transduced Sca-1(+) cells ((Net)Sca-1(+)) and Ad-null transduced Sca-1(+) cells ((Null)Sca-1(+)). Overexpression of netrin-1 in (Net)Sca-1(+) was confirmed by reverse transcription-polymerase chain reaction and western blot. Neonatal cardiomyocytes and rat endothelial cells expressed netrin-1 specific receptor Uncoordinated-5b and the conditioned medium from (Net)Sca-1(+) cells was protective for both the cell types against oxidant stress. For in vivo studies, the rat model of myocardial ischemia/reperfusion injury was developed in female Wistar rats by left anterior descending coronary artery occlusion for 45 min followed by reperfusion. The animals were grouped to receive 70 μL of Dulbecco's modified Eagle's medium without cells (group-1), containing 2×10(6) (Null)Sca-1(+) cells (group-2) and (Net)Sca-1(+) cells (group-3). (Net)Sca-1(+) cells significantly reduced ischemia/reperfusion injury in the heart and preserved the global heart function in group-3 (P<0.05 vs. groups-1 and group-2). Ex-vivo netrin-1 overexpression in the heart increased NOS activity in the heart. Blood vessel density was significantly higher in group-3 (P<0.05 vs. controls). We concluded that netrin-1 decreased apoptosis in cardiomyocytes and endothelial cells via activation of Akt. Netrin-1 transgene expression was proangiogenic and effectively reduced ischemia/reperfusion injury to preserve global heart function.
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Affiliation(s)
- Shazia Durrani
- Department of Pathology and Laboratory Medicine, University of Cincinnati Medical Center, Cincinnati, OH 45267-0529, USA
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31
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Sun H, Le T, Chang TTJ, Habib A, Wu S, Shen F, Young WL, Su H, Liu J. AAV-mediated netrin-1 overexpression increases peri-infarct blood vessel density and improves motor function recovery after experimental stroke. Neurobiol Dis 2011; 44:73-83. [PMID: 21726647 DOI: 10.1016/j.nbd.2011.06.006] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2010] [Revised: 06/01/2011] [Accepted: 06/16/2011] [Indexed: 12/18/2022] Open
Abstract
Apart from its role in axon guidance, netrin-1 is also known to be pro-angiogenic. The aim of this study is to determine whether adeno-associated viral (AAV) mediated overexpression of netrin-1 improves post-stroke neurovascular structure and recovery of function. AAV-Netrin-1 or AAV-LacZ of 1×10(10) genome copies each was injected medial and posterior to ischemic lesion at one hour following reperfusion using the distal middle cerebral artery occlusion (MCAO) method. Quantitative RT-PCR revealed that the expression of netrin-1 transgene began as early as one day and increased dramatically about 3 weeks following vector injection. Western blot analysis and confocal microscopy suggested that both the endogenous and transduced netrin-1 were expressed in the neurons of the peri-infarct cortex after MCAO. AAV-mediated netrin-1 overexpression significantly increased vascular density in the peri-infarct cortex and promoted the migration of immature neurons into the peri-infarct white matter, but it did not significantly reduce infarct size. Netrin-1 overexpression also enhanced post-stroke locomotor activity, improved exploratory behavior, and reduced ischemia-induced motor asymmetry in forelimb usage. However, it had little effect on post-stroke spatial learning and memory. Our results suggest that AAV mediated netrin-1 overexpression improves peri-infarct vascular density and post stroke motor function.
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Affiliation(s)
- Hui Sun
- Department of Neurological Surgery, San Francisco, CA, USA
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32
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Sandell LL, Iulianella A, Melton KR, Lynn M, Walker M, Inman KE, Bhatt S, Leroux-Berger M, Crawford M, Jones NC, Dennis JF, Trainor PA. A phenotype-driven ENU mutagenesis screen identifies novel alleles with functional roles in early mouse craniofacial development. Genesis 2011; 49:342-59. [PMID: 21305688 DOI: 10.1002/dvg.20727] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2010] [Accepted: 01/24/2011] [Indexed: 01/13/2023]
Abstract
Proper craniofacial development begins during gastrulation and requires the coordinated integration of each germ layer tissue (ectoderm, mesoderm, and endoderm) and its derivatives in concert with the precise regulation of cell proliferation, migration, and differentiation. Neural crest cells, which are derived from ectoderm, are a migratory progenitor cell population that generates most of the cartilage, bone, and connective tissue of the head and face. Neural crest cell development is regulated by a combination of intrinsic cell autonomous signals acquired during their formation, balanced with extrinsic signals from tissues with which the neural crest cells interact during their migration and differentiation. Although craniofacial anomalies are typically attributed to defects in neural crest cell development, the cause may be intrinsic or extrinsic. Therefore, we performed a phenotype-driven ENU mutagenesis screen in mice with the aim of identifying novel alleles in an unbiased manner, that are critically required for early craniofacial development. Here we describe 10 new mutant lines, which exhibit phenotypes affecting frontonasal and pharyngeal arch patterning, neural and vascular development as well as sensory organ morphogenesis. Interestingly, our data imply that neural crest cells and endothelial cells may employ similar developmental programs and be interdependent during early embryogenesis, which collectively is critical for normal craniofacial morphogenesis. Furthermore our novel mutants that model human conditions such as exencephaly, craniorachischisis, DiGeorge, and Velocardiofacial sydnromes could be very useful in furthering our understanding of the complexities of specific human diseases.
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Affiliation(s)
- Lisa L Sandell
- Stowers Institute for Medical Research, Kansas City, Missouri, USA
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33
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Eveno C, Broqueres-You D, Feron JG, Rampanou A, Tijeras-Raballand A, Ropert S, Leconte L, Levy BI, Pocard M. Netrin-4 delays colorectal cancer carcinomatosis by inhibiting tumor angiogenesis. THE AMERICAN JOURNAL OF PATHOLOGY 2011; 178:1861-9. [PMID: 21406174 DOI: 10.1016/j.ajpath.2010.12.019] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Received: 05/25/2010] [Revised: 12/07/2010] [Accepted: 12/17/2010] [Indexed: 11/17/2022]
Abstract
A close relationship between tumor angiogenesis, growth, and carcinomatosis has been observed. Netrin-4 (NT-4) has been shown to regulate angiogenic responses. We aimed to examine the effects of NT-4 on colon tumor angiogenesis, growth, and carcinomatosis. We showed that NT-4 was expressed in human colon cancer cells (LS174). A 20-fold increase in NT-4 expression was stably induced by NT-4 pcDNA in LS174 cells. In vivo, a Matrigel angiogenesis assay showed that NT-4 overexpression altered vascular endothelial growth factor (VEGF)/basic fibroblast growth factor-induced angiogenesis. In nude mice with LS174 xenografts, NT-4 overexpression inhibited tumor angiogenesis and growth. In addition, these NT-4-involved inhibitory effects were associated with decreased tumor cell proliferation and increased tumor cell apoptosis. Using an orthotopic peritoneal carcinomatosis model, we demonstrated that NT-4 overexpression decreased colorectal cancer carcinomatosis. Moreover, carcinomatosis-related ascites formation was significantly decreased in mice transplanted with NT-4 LS174 cells versus control LS174 cells. The antiangiogenic activity of NT-4 was probably mediated by binding to its receptor neogenin. Netrin-4 had a direct effect on neither in vitro apoptosis and proliferation of cultured LS174 cells nor the VEGF-induced acute increase in vascular permeability in vivo. We propose that NT-4 overexpression decreases tumor growth and carcinomatosis, probably via an antiangiogenic effect, underlying the potential therapeutic interest in NT-4 in the treatment of colorectal cancer growth and carcinomatosis.
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Affiliation(s)
- Clarisse Eveno
- INSERM U965 (Paris 7 University), Hôpital Lariboisière, Paris, France
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Weijers EM, van Wijhe MH, Joosten L, Horrevoets AJG, de Maat MPM, van Hinsbergh VWM, Koolwijk P. Molecular weight fibrinogen variants alter gene expression and functional characteristics of human endothelial cells. J Thromb Haemost 2010; 8:2800-9. [PMID: 20946180 DOI: 10.1111/j.1538-7836.2010.04096.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
BACKGROUND Fibrin is a temporary matrix that not only seals a wound, but also provides a temporary matrix structure for invading cells during wound healing. Two naturally occurring fibrinogen variants, high molecular weight (HMW) and low molecular weight (LMW) fibrinogen, display different properties in supporting angiogenesis in vivo and in vitro. OBJECTIVES This study was aimed at investigating the functional characteristics and molecular mechanisms of human microvascular endothelial cells (HMVECs) cultured on HMW and LMW fibrin matrices. METHODS AND RESULTS HMVECs on HMW fibrin matrices showed increased proliferation and tube formation as compared with their counterparts on unfractionated and LMW fibrin. Degradation of HMW fibrin was markedly enhanced by the presence of HMVECs, that of LMW fibrin was enhanced only slightly. However, the expression levels of fibrinolysis-regulating proteins and integrins were similar. Subsequent microarray analysis revealed that the expression of 377 genes differed significantly between HMVECs cultured on HMW fibrin and those cultured on LMW fibrin. Among these genes, UNC5B, DLL4 and the DLL4-Notch downstream targets Hey1, Hey2 and Hes1 showed increased expression in HMVECs on LMW fibrin. However, pharmacologic and genetic (DLL4 small interfering RNA) inhibition of DLL4-Notch signaling blunted rather than enhanced proliferation and tube formation by HMVECs on both fibrin variants. CONCLUSIONS Heterogeneity in naturally occurring fibrinogen strongly influences endothelial cell proliferation and tube formation, and causes alterations in gene expression, including that of DLL4-Notch. The higher fibrinolytic sensitivity of HMW fibrin in the presence of HMVECs contributes to increased tube formation. Although the expression of DLL4-Notch was altered, it did not explain the enhanced tube formation in HMW fibrin. This study provides new perspectives for biological and tissue engineering applications.
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Affiliation(s)
- E M Weijers
- Department of Physiology, Institute for Cardiovascular Research (ICaR-VU), VU University Medical Center, Amsterdam
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35
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Yuan Y, Leszczynska M, Konstantinovsky S, Tropé CG, Reich R, Davidson B. Netrin-4 is upregulated in breast carcinoma effusions compared to corresponding solid tumors. Diagn Cytopathol 2010; 39:562-6. [PMID: 20730893 DOI: 10.1002/dc.21424] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2010] [Accepted: 04/05/2010] [Indexed: 11/07/2022]
Abstract
We recently identified overexpression of the NTN4 gene in breast carcinoma effusions compared to primary carcinomas using gene-expression arrays. The objective of this study was to validate this finding at protein level and analyze the clinical role of Netrin-4 in breast carcinoma effusions. We additionally studied Netrin-4 expression and its clinical relevance in Müllerian (ovarian, peritoneal, and tubal) carcinoma effusions. Sections from 82 breast carcinomas (53 effusions and 29 solid tumors) and 57 Müllerian carcinoma effusions were stained for Netrin-4 using immunohistochemistry. Immunoreactivity was scored in carcinoma cells and analyzed for association with clinicopathologic parameters, including survival. In breast carcinoma, expression of Netrin-4 was detected in carcinoma cells in 30/53 (57%) effusions compared to 3/29 (10%) solid tumors (P < 0.001). Netrin-4 was further expressed in 31/57 (54%) Müllerian carcinoma effusions. No association was found between Netrin-4 expression in breast or Müllerian carcinoma effusions and clinicopathologic parameters, including survival. Our data provide validation on protein level of upregulated Netrin-4 expression in breast carcinoma effusions. The frequent expression of Netrin-4 in Müllerian carcinoma effusions suggests a biological role for this molecule in metastases from gynecological malignancies. Netrin-4 expression in effusions does not appear to be a predictor of disease outcome.
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Affiliation(s)
- Yuan Yuan
- Division of Pathology, Norwegian Radium Hospital, Oslo University Hospital, N-0310 Oslo, Norway
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Duman-Scheel M. Netrin and DCC: axon guidance regulators at the intersection of nervous system development and cancer. Curr Drug Targets 2009; 10:602-10. [PMID: 19601764 DOI: 10.2174/138945009788680428] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
In recent years, a number of axon guidance genes, including Netrin (Net) and Deleted in Colorectal Cancer (DCC), have been implicated in human cancers. Many of the hallmarks of human cancer, such as cell growth, invasion, evasion of apoptosis, and formation of a blood supply to the tumor, involve cellular processes that are critical during nervous system development. Here, the roles of Net-DCC in the regulation of these cellular processes in tumors and developing neurons are discussed. The advantages of using Drosophila to study the function of Net-DCC and other axon guidance molecules in these cellular processes, as well as the potential for cancer therapeutics targeting Net-DCC are highlighted.
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Affiliation(s)
- M Duman-Scheel
- Indiana University School of Medicine-South Bend at Notre Dame, Raclin-Carmichael Hall, 1234 Notre Dame Ave., South Bend, IN 46617, USA.
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Lee HS, Han J, Bai HJ, Kim KW. Brain angiogenesis in developmental and pathological processes: regulation, molecular and cellular communication at the neurovascular interface. FEBS J 2009; 276:4622-35. [PMID: 19664072 DOI: 10.1111/j.1742-4658.2009.07174.x] [Citation(s) in RCA: 128] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The vascular network of the brain is formed by the invasion of vascular sprouts from the pia mater toward the ventricles. Following angiogenesis of the primary vascular network, brain vessels experience a maturation process known as barriergenesis, in which the blood-brain barrier is formed. In this minireview, we discuss the processes of brain angiogenesis and barriergenesis, as well as the molecular and cellular mechanisms underlying brain vessel formation. At the molecular level, angiogenesis and barriergenesis occur via the coordinated action of oxygen-responsive molecules (e.g. hypoxia-inducible factor and Src-suppressed C kinase substrate/AKAP12) and soluble factors (e.g. vascular endothelial growth factor and angiopoietin-1), as well as axon guidance molecules and neurotrophic factors. At the cellular level, we focus on neurovascular cells, such as pericytes, astrocytes, vascular smooth muscle cells, neurons and brain macrophages. Each cell type plays a unique role, and works with other types to maintain environmental homeostasis and to respond to certain stimuli. Taken together, this minireview emphasizes the importance of the coordinated action of molecules and cells at the neurovascular interface, with regards to the regulation of angiogenesis and barriergenesis.
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Affiliation(s)
- Hye Shin Lee
- Neurovascular Coordination Research Center, College of Pharmacy, Seoul National University, Korea
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Autoinhibition of UNC5b Revealed by the Cytoplasmic Domain Structure of the Receptor. Mol Cell 2009; 33:692-703. [DOI: 10.1016/j.molcel.2009.02.016] [Citation(s) in RCA: 74] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2008] [Revised: 01/26/2009] [Accepted: 02/17/2009] [Indexed: 11/20/2022]
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Guidance from above: common cues direct distinct signaling outcomes in vascular and neural patterning. Trends Cell Biol 2009; 19:99-110. [PMID: 19200729 DOI: 10.1016/j.tcb.2009.01.001] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2008] [Revised: 12/19/2008] [Accepted: 01/05/2009] [Indexed: 01/13/2023]
Abstract
The nervous and vascular systems are both exquisitely branched and complicated systems and their proper development requires careful guidance of nerves and vessels. The recent realization that common ligand-receptor pairs are used in guiding the patterning of both systems has prompted the question of whether similar signaling pathways are used in both systems. This review highlights recent progress in our understanding of the similarities and differences in the intracellular signaling mechanisms downstream of semaphorins, ephrins and vascular endothelial growth factor in neurons and endothelial cells during neural and vascular development. We present evidence that similar intracellular signaling principles underlying cytoskeletal regulation are used to control neural and vascular guidance, although the specific molecules used in neurons and endothelial cells are often different.
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