1
|
Guo M, Zhang J, Han J, Hu Y, Ni H, Yuan J, Sun Y, Liu M, Gao L, Liao W, Ma C, Liu Y, Li S, Li N. VEGFR2 blockade inhibits glioblastoma cell proliferation by enhancing mitochondrial biogenesis. J Transl Med 2024; 22:419. [PMID: 38702818 PMCID: PMC11067099 DOI: 10.1186/s12967-024-05155-1] [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: 12/06/2023] [Accepted: 04/02/2024] [Indexed: 05/06/2024] Open
Abstract
BACKGROUND Glioblastoma is an aggressive brain tumor linked to significant angiogenesis and poor prognosis. Anti-angiogenic therapies with vascular endothelial growth factor receptor 2 (VEGFR2) inhibition have been investigated as an alternative glioblastoma treatment. However, little is known about the effect of VEGFR2 blockade on glioblastoma cells per se. METHODS VEGFR2 expression data in glioma patients were retrieved from the public database TCGA. VEGFR2 intervention was implemented by using its selective inhibitor Ki8751 or shRNA. Mitochondrial biogenesis of glioblastoma cells was assessed by immunofluorescence imaging, mass spectrometry, and western blot analysis. RESULTS VEGFR2 expression was higher in glioma patients with higher malignancy (grade III and IV). VEGFR2 inhibition hampered glioblastoma cell proliferation and induced cell apoptosis. Mass spectrometry and immunofluorescence imaging showed that the anti-glioblastoma effects of VEGFR2 blockade involved mitochondrial biogenesis, as evidenced by the increases of mitochondrial protein expression, mitochondria mass, mitochondrial oxidative phosphorylation (OXPHOS), and reactive oxygen species (ROS) production, all of which play important roles in tumor cell apoptosis, growth inhibition, cell cycle arrest and cell senescence. Furthermore, VEGFR2 inhibition exaggerated mitochondrial biogenesis by decreased phosphorylation of AKT and peroxisome proliferator-activated receptor gamma coactivator 1-alpha (PGC1α), which mobilized PGC1α into the nucleus, increased mitochondrial transcription factor A (TFAM) expression, and subsequently enhanced mitochondrial biogenesis. CONCLUSIONS VEGFR2 blockade inhibits glioblastoma progression via AKT-PGC1α-TFAM-mitochondria biogenesis signaling cascade, suggesting that VEGFR2 intervention might bring additive therapeutic values to anti-glioblastoma therapy.
Collapse
Affiliation(s)
- Min Guo
- Department of Radiology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China.
| | - Junhao Zhang
- Department of Medicine-Solna, Division of Cardiovascular Medicine, Karolinska University Hospital, Solna, 171 76, Stockholm, Sweden
- Department of Oncology, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Jiang Han
- Department of Biopharmaceutical Sciences and National Key Laboratory of Frigid Zone Cardiovascular Diseases (NKLFZCD), College of Pharmacy, Harbin Medical University, Harbin, China
| | - Yingyue Hu
- Department of Biopharmaceutical Sciences and National Key Laboratory of Frigid Zone Cardiovascular Diseases (NKLFZCD), College of Pharmacy, Harbin Medical University, Harbin, China
| | - Hao Ni
- Department of Medicine-Solna, Division of Cardiovascular Medicine, Karolinska University Hospital, Solna, 171 76, Stockholm, Sweden
- Department of Gynaecology and Obstetrics, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Juan Yuan
- Department of Cell and Molecular Biology, Karolinska Institutet, Stockholm, Sweden
| | - Yang Sun
- Department of Immunology and Shandong University-Karolinska Institutet Collaborative Laboratory, Shandong University Cheeloo Medical College, School of Basic Medicine, Jinan, China
| | - Meijuan Liu
- Department of Biopharmaceutical Sciences and National Key Laboratory of Frigid Zone Cardiovascular Diseases (NKLFZCD), College of Pharmacy, Harbin Medical University, Harbin, China
| | - Lifen Gao
- Department of Immunology and Shandong University-Karolinska Institutet Collaborative Laboratory, Shandong University Cheeloo Medical College, School of Basic Medicine, Jinan, China
| | - Wangjun Liao
- Department of Oncology, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Chunhong Ma
- Department of Immunology and Shandong University-Karolinska Institutet Collaborative Laboratory, Shandong University Cheeloo Medical College, School of Basic Medicine, Jinan, China
| | - Yaou Liu
- Department of Radiology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Shuijie Li
- Department of Biopharmaceutical Sciences and National Key Laboratory of Frigid Zone Cardiovascular Diseases (NKLFZCD), College of Pharmacy, Harbin Medical University, Harbin, China.
| | - Nailin Li
- Department of Medicine-Solna, Division of Cardiovascular Medicine, Karolinska University Hospital, Solna, 171 76, Stockholm, Sweden.
| |
Collapse
|
2
|
Bartkowiak K, Bartkowiak M, Jankowska-Steifer E, Ratajska A, Kujawa M, Aniołek O, Niderla-Bielińska J. Metabolic Syndrome and Cardiac Vessel Remodeling Associated with Vessel Rarefaction: A Possible Underlying Mechanism May Result from a Poor Angiogenic Response to Altered VEGF Signaling Pathways. J Vasc Res 2024:1-9. [PMID: 38615659 DOI: 10.1159/000538361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Accepted: 03/09/2024] [Indexed: 04/16/2024] Open
Abstract
BACKGROUND Elevated mortality rates in patients with metabolic syndrome (MetS) are partly due to adverse remodeling of multiple organs, which may lead to cardiovascular disease, nonalcoholic fatty liver disease, kidney failure, or other conditions. MetS symptoms, such as obesity, hypertension, hyperglycemia, dyslipidemia, associated with insulin and leptin resistance, are recognized as major cardiovascular risk factors that adversely affect the heart. SUMMARY Pathological cardiac remodeling is accompanied by endothelial cell dysfunction which may result in diminished coronary flow, dysregulated oxygen demand/supply balance, as well as vessel rarefaction. The reduced number of vessels and delayed or inhibited formation of collaterals after myocardial infarction in MetS heart may be due to unfavorable changes in endothelial cell metabolism but also to altered expression of vascular endothelial growth factor molecules, their receptors, and changes in signal transduction from the cell membrane, which severely affect angiogenesis. KEY MESSAGES Given the established role of cardiac vessel endothelial cells in maintaining tissue homeostasis, defining the molecular background underlying vessel dysfunction associated with impaired angiogenesis is of great importance for future therapeutic purposes. Therefore, the aim of this paper was to present current information regarding vascular endothelial growth factor signaling in the myocardium of MetS individuals.
Collapse
Affiliation(s)
- Krzysztof Bartkowiak
- Department of Histology and Embryology, Medical University of Warsaw, Warsaw, Poland
| | - Mateusz Bartkowiak
- Department of General, Transplant and Liver Surgery, Medical University of Warsaw, Warsaw, Poland
| | - Ewa Jankowska-Steifer
- Department of Histology and Embryology, Medical University of Warsaw, Warsaw, Poland
| | - Anna Ratajska
- Department of Pathology, Medical University of Warsaw, Warsaw, Poland
| | - Marek Kujawa
- Department of Histology and Embryology, Faculty of Medicine, Lazarski University, Warsaw, Poland
| | - Olga Aniołek
- Department of Histology and Embryology, Faculty of Medicine, Lazarski University, Warsaw, Poland
| | | |
Collapse
|
3
|
Błaszkiewicz M, Walulik A, Florek K, Górecki I, Sławatyniec O, Gomułka K. Advances and Perspectives in Relation to the Molecular Basis of Diabetic Retinopathy-A Review. Biomedicines 2023; 11:2951. [PMID: 38001952 PMCID: PMC10669459 DOI: 10.3390/biomedicines11112951] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Revised: 10/26/2023] [Accepted: 10/27/2023] [Indexed: 11/26/2023] Open
Abstract
Diabetes mellitus (DM) is a growing problem nowadays, and diabetic retinopathy (DR) is its predominant complication. Currently, DR diagnosis primarily relies on fundoscopic examination; however, novel biomarkers may facilitate that process and make it widely available. In this current review, we delve into the intricate roles of various factors and mechanisms in DR development, progression, prediction, and their association with therapeutic approaches linked to the underlying pathogenic pathways. Specifically, we focus on advanced glycation end products, vascular endothelial growth factor (VEGF), asymmetric dimethylarginine, endothelin-1, and the epigenetic regulation mediated by microRNAs (miRNAs) in the context of DR.
Collapse
Affiliation(s)
- Michał Błaszkiewicz
- Student Scientific Group of Adult Allergology, Wroclaw Medical University, 50-369 Wroclaw, Poland
| | - Agata Walulik
- Student Scientific Group of Adult Allergology, Wroclaw Medical University, 50-369 Wroclaw, Poland
| | - Kamila Florek
- Student Scientific Group of Adult Allergology, Wroclaw Medical University, 50-369 Wroclaw, Poland
| | - Ignacy Górecki
- Student Scientific Group of Adult Allergology, Wroclaw Medical University, 50-369 Wroclaw, Poland
| | - Olga Sławatyniec
- Student Scientific Group of Adult Allergology, Wroclaw Medical University, 50-369 Wroclaw, Poland
| | - Krzysztof Gomułka
- Clinical Department of Internal Medicine, Pneumology and Allergology, Wroclaw Medical University, 50-369 Wroclaw, Poland
| |
Collapse
|
4
|
Nassar-Reis JP, Umeta PF, Stefano JT, Longatto-Filho A, Carrilho FJ, Alves VAF, Cogliati B, Oliveira CP. P53 and VEGF are promising biomarkers for sorafenib efficacy in an experimental model of NASH-related HCC. J Mol Histol 2023; 54:473-488. [PMID: 37605073 DOI: 10.1007/s10735-023-10142-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Accepted: 07/23/2023] [Indexed: 08/23/2023]
Abstract
The efficacy of systemic therapy for hepatocellular carcinoma (HCC) related to non-alcoholic steatohepatitis (NASH) is poorly understood. In this study we evaluated the effects of sorafenib based on the expression of molecular markers related to major hepatocarcinogenesis pathways and angiogenesis in a NASH-related HCC model. Forty male rats were submitted to NASH-HCC induction through the combination of a high-fat and choline deficient diet and diethylnitrosamine (100 mg/L) administration in the drinking water for 13 and 16 weeks. After the induction period, the rats received daily gavage administration of saline solution (control) or Sorafenib (5 mg/kg/day) for 3 weeks. Thereafter, the animals were euthanized and samples from liver nodules were collected for histopathological analysis and immunohistochemical assessment of HEP-PAR-1, glutamine-synthetase, VEGF, survivin, β-catenin and p53. A semi-quantitative score was used for VEGF, survivin and β-catenin analysis. For p53, the percentage of positive cells was determined. Results were processed by Wilcoxon's test or Student's t-test. Both protocols efficiently induced HCC, most of them being moderately to poorly differentiated. Sorafenib-treated animals showed a decreased expression of VEGF and p53 in HCCs generated at 13 weeks when compared to control animals (p = 0.03; p = 0.04, respectively). No significant difference in β-catenin and survivin were observed. There was a significant decrease in VEGF and p53 expression when comparing the two control groups (13 vs. 16 weeks, p < 0.01). p53 and VEGF are promising biomarkers for assessment of efficacy of Sorafenib, whereas survivin and β-catenin were not found useful. Decreased immunohistochemical expression of p53 and VEGF in the 16 week control group may indicate a different metabolic status of HCC.
Collapse
Affiliation(s)
- João Pedro Nassar-Reis
- Laboratory of Experimental and Comparative Liver Research (Liver Lab), Department of Pathology, School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, 05508-270, Brazil
- Laboratório de Gastroenterologia Clínica e Experimental (LIM-07), Division of Clinical Gastroenterology and Hepatology, Department of Gastroenterology, Hospital das Clínicas, University of São Paulo School of Medicine, São Paulo, 01246-903, Brazil
| | - Pedro Fukui Umeta
- Laboratório de Gastroenterologia Clínica e Experimental (LIM-07), Division of Clinical Gastroenterology and Hepatology, Department of Gastroenterology, Hospital das Clínicas, University of São Paulo School of Medicine, São Paulo, 01246-903, Brazil
| | - José Tadeu Stefano
- Laboratório de Gastroenterologia Clínica e Experimental (LIM-07), Division of Clinical Gastroenterology and Hepatology, Department of Gastroenterology, Hospital das Clínicas, University of São Paulo School of Medicine, São Paulo, 01246-903, Brazil
| | - Adhemar Longatto-Filho
- Department of Pathology (LIM-14), University of São Paulo School of Medicine, São Paulo, 05808-010, Brazil
- School of Medicine, Life and Health Sciences Research Institute (ICVS), University of Minho, 4704-553, Braga, Portugal
- ICVS/3B's-PT Government Associate Laboratory, 4710-057, Braga, Portugal
- Molecular Oncology Research Center, Barretos Cancer Hospital, Barretos, 14784-400, Brazil
| | - Flair José Carrilho
- Laboratório de Gastroenterologia Clínica e Experimental (LIM-07), Division of Clinical Gastroenterology and Hepatology, Department of Gastroenterology, Hospital das Clínicas, University of São Paulo School of Medicine, São Paulo, 01246-903, Brazil
| | | | - Bruno Cogliati
- Laboratory of Experimental and Comparative Liver Research (Liver Lab), Department of Pathology, School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, 05508-270, Brazil
| | - Claudia P Oliveira
- Laboratório de Gastroenterologia Clínica e Experimental (LIM-07), Division of Clinical Gastroenterology and Hepatology, Department of Gastroenterology, Hospital das Clínicas, University of São Paulo School of Medicine, São Paulo, 01246-903, Brazil.
| |
Collapse
|
5
|
Zarychta E, Bielawski K, Wrzeszcz K, Rhone P, Ruszkowska-Ciastek B. Unraveling the Angiogenic Puzzle: Pre-Treatment sVEGFR1 and sVEGFR2 Levels as Promising Prognostic Indicators in Early-Stage Breast Cancer Patients. Int J Mol Sci 2023; 24:13508. [PMID: 37686312 PMCID: PMC10487545 DOI: 10.3390/ijms241713508] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Revised: 08/24/2023] [Accepted: 08/26/2023] [Indexed: 09/10/2023] Open
Abstract
Despite the advancements in breast cancer (BrC) diagnosis and treatment, a considerable proportion of patients with early-stage disease still experience local recurrence or metastasis. This study aimed to assess the levels of specific angiogenic parameters in the EDTA plasma of BrC patients before and after treatment and to explore their clinical and prognostic significance. The levels of vascular endothelial growth factor A (VEGF-A), soluble form of vascular endothelial growth factor receptor type 1 (sVEGFR1), and soluble form of vascular endothelial growth factor receptor type 2 (sVEGFR2) were measured in 84 early BrC patients, both prior to surgery and within a median time of nine months post-treatment. Prognostic significance was evaluated using Kaplan-Meier survival and Cox regression analyses. Linear regression models were employed to examine the independent impact of selected angiogenic factors on DFS in breast cancer patients. The results of uni- and multivariate analyses indicated that a pre-treatment concentration of sVEGFR1 above 30.99 pg/mL was associated with improved disease-free survival (DFS) (p < 0.0001 for both analyses), while a pre-treatment concentration of sVEGFR2 above 9475.67 pg/mL was associated with an increased risk of BrC relapse (p < 0.0001 for both analyses). Additionally, a post-treatment concentration of sVEGFR2 above 7361.71 pg/mL was associated with better overall survival (OS) based on the Kaplan-Meier survival analysis (p = 0.0141). Furthermore, linear regression models revealed a significant inverse association between pre-treatment levels of sVEGFR1 and the risk of relapse (standardized β -0.2578, p = 0.0499) and a significant positive association of VEGF-A levels with the risk of recurrence (standardized β 0.2958, p = 0.0308). In conclusion, the findings suggest that both pre- and post-treatment levels of sVEGFR1 and sVEGFR2 may hold promise as potential prognostic markers for BrC patients.
Collapse
Affiliation(s)
- Elżbieta Zarychta
- Department of Pathophysiology, Faculty of Pharmacy, Nicolaus Copernicus University, Collegium Medicum, 9 Curie Sklodowska Street, 85-094 Bydgoszcz, Poland; (K.B.); (K.W.); (B.R.-C.)
- Invicta Fertility Clinic, 6 Zlota Street, 00-019 Warsaw, Poland
| | - Kornel Bielawski
- Department of Pathophysiology, Faculty of Pharmacy, Nicolaus Copernicus University, Collegium Medicum, 9 Curie Sklodowska Street, 85-094 Bydgoszcz, Poland; (K.B.); (K.W.); (B.R.-C.)
| | - Katarzyna Wrzeszcz
- Department of Pathophysiology, Faculty of Pharmacy, Nicolaus Copernicus University, Collegium Medicum, 9 Curie Sklodowska Street, 85-094 Bydgoszcz, Poland; (K.B.); (K.W.); (B.R.-C.)
| | - Piotr Rhone
- Clinical Ward of Breast Cancer and Reconstructive Surgery, Oncology Centre Prof. F. Łukaszczyk Memorial Hospital, 2 Romanowska Street, 85-796 Bydgoszcz, Poland;
| | - Barbara Ruszkowska-Ciastek
- Department of Pathophysiology, Faculty of Pharmacy, Nicolaus Copernicus University, Collegium Medicum, 9 Curie Sklodowska Street, 85-094 Bydgoszcz, Poland; (K.B.); (K.W.); (B.R.-C.)
| |
Collapse
|
6
|
Di Stasi R, De Rosa L, D'Andrea LD. Structure-Based Design of Peptides Targeting VEGF/VEGFRs. Pharmaceuticals (Basel) 2023; 16:851. [PMID: 37375798 DOI: 10.3390/ph16060851] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Revised: 05/03/2023] [Accepted: 06/04/2023] [Indexed: 06/29/2023] Open
Abstract
Vascular endothelial growth factor (VEGF) and its receptors (VEGFRs) play a main role in the regulation of angiogenesis and lymphangiogenesis. Furthermore, they are implicated in the onset of several diseases such as rheumatoid arthritis, degenerative eye conditions, tumor growth, ulcers and ischemia. Therefore, molecules able to target the VEGF and its receptors are of great pharmaceutical interest. Several types of molecules have been reported so far. In this review, we focus on the structure-based design of peptides mimicking VEGF/VEGFR binding epitopes. The binding interface of the complex has been dissected and the different regions challenged for peptide design. All these trials furnished a better understanding of the molecular recognition process and provide us with a wealth of molecules that could be optimized to be exploited for pharmaceutical applications.
Collapse
Affiliation(s)
| | - Lucia De Rosa
- Istituto di Biostrutture e Bioimmagini, CNR, 80131 Napoli, Italy
| | | |
Collapse
|
7
|
González López R, Contreras Caro Del Castillo DA, Valdez Magaña G, Sarmiento Silva RE, Martínez Castañeda FE, Trujillo Ortega ME. Expression and localization of vascular endothelial growth factor and its receptors in the pig uterus during peri-implantation and determination of the in vitro effect of the angiogenesis inhibitor SU5416 on VEGF system expression. Theriogenology 2023; 207:49-60. [PMID: 37269596 DOI: 10.1016/j.theriogenology.2023.05.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Revised: 05/17/2023] [Accepted: 05/17/2023] [Indexed: 06/05/2023]
Abstract
The aim of this work was to determine endometrial mRNA expression and uterine protein localization of vascular endothelial growth factor (VEGF) and its receptors VEGFR1 and VEGFR2 during the estrous cycle and peri-implantation period in sows. Uterine tissues were collected from pregnant sows on days 12, 14, 16, and 18 after artificial insemination and from non-pregnant animals on days 2 and 12 of the estrous cycle (day 0 = day of estrus). Using immunohistochemistry, a positive signal for VEGF and its receptor VEGFR2 was found in uterine luminal epithelial cells, endometrial glands, stroma, blood vessels, and myometrium. A VEGFR1 signal was only found in endometrial and myometrial blood vessels and stroma. By day 18 of gestation, the mRNA expression levels of VEGF, VEGFR1, and VEGFR2 were higher than those observed on days 2 and 12 of the estrous cycle and on days 12, 14, and 16 of gestation. Then, a primary culture of sow endometrial epithelial cells was established to define the potential of the selective inhibition of VEGFR2 after treatment with inhibitor SU5416 and determine its effects on the expression pattern of the VEGF system. The endometrial epithelial cells treated with SU5416 showed a dose-dependent decrease in VEGFR1 and VEGFR2 mRNA expression. The present study provides additional evidence on the importance of the VEGF system during peri-implantation, as well as on the specific inhibitory activity of SU5416 in epithelial cells, which, as demonstrated, express the protein and mRNA of VEGF and its receptors VEGFR1 and VEGFR2.
Collapse
Affiliation(s)
- Rodrigo González López
- Universidad Nacional Autónoma de México, Facultad de Medicina Veterinaria y Zootecnia, 04510, Ciudad de México, Mexico
| | | | - Griselda Valdez Magaña
- Universidad Nacional Autónoma de México, Facultad de Medicina Veterinaria y Zootecnia, 04510, Ciudad de México, Mexico
| | - Rosa Elena Sarmiento Silva
- Universidad Nacional Autónoma de México, Facultad de Medicina Veterinaria y Zootecnia, 04510, Ciudad de México, Mexico
| | | | - María Elena Trujillo Ortega
- Universidad Nacional Autónoma de México, Facultad de Medicina Veterinaria y Zootecnia, 04510, Ciudad de México, Mexico.
| |
Collapse
|
8
|
Li S, Sun J, Yang J, Yang Y, Ding H, Yu B, Ma K, Chen M. Gelatin methacryloyl (GelMA) loaded with concentrated hypoxic pretreated adipose-derived mesenchymal stem cells(ADSCs) conditioned medium promotes wound healing and vascular regeneration in aged skin. Biomater Res 2023; 27:11. [PMID: 36782342 PMCID: PMC9926638 DOI: 10.1186/s40824-023-00352-3] [Citation(s) in RCA: 21] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Accepted: 02/04/2023] [Indexed: 02/15/2023] Open
Abstract
BACKGROUND Aging skin is characterized by a disturbed structure and lack of blood supply, which makes it difficult to heal once injured. ADSCs secrete large amounts of cytokines, which promote wound healing and vascular regeneration through paracrine secretion, and the number of cytokines can be elevated by hypoxic pretreating. However, the components of ADSCs are difficult to retain in wounds. Gelatin methacrylate (GelMA) is a photopolymerizable hydrogel synthesized from gelatin and has recently emerged as a potentially attractive material for tissue engineering applications. GelMA loaded with concentrated hypoxic pretreated ADSCs conditioned medium could provide a new method of treating wounds in aged skin. METHODS Primary ADSCs were isolated from human adipose tissue and characterized by flow cytometry and differentiation test. ADSCs in passages 4-6 were pretreated in the hypoxic and normoxic environments to collect conditioned medium, the conditioned medium was then concentrated to prepare concentrated ADSCs conditioned medium(cADSC-CM)(the one collected from ADSCs under hypoxia was called hypo-CM ,and the one from normoxia was called nor-CM). The concentration of cytokines was detected. After treated with cADSC-CM, the abilities of proliferation, migration, and tube formation of human umbilical vascular endothelial cells (HUVECs) were assayed, and Akt/mTOR and MAPK signal pathway was detected using western blotting. GelMA+hypo-CM hydrogel was prepared, and a comprehensive evaluation of morphology, protein release efficiency, degradation rate, mechanical properties, and rheology properties were performed. Full-thickness skin wounds were created on the backs of 20-month-old mice. After surgery, GelMA, GelMA+F12, GelMA+hypo-CM, and GelMA+nor-CM were applied to the wound surface respectively. H&E, Masson, and immunohistochemistry staining were performed, and a laser Doppler perfusion imager was used to evaluate the blood perfusion. The student's t-test was used for analysis between two groups and a one-way analysis of variance (ANOVA) was used for analysis among multi groups. RESULTS Our results revealed that 1) wounds in aged skin healed more slowly than that in young skin and exhibited poorer perfusion; 2) hypoxic pretreated ADSCs secreted more cytokines including VEGF by activating HIF1α; 3) hypo-CM promoted proliferation and migration of HUVECs through VEGF/Akt/mTOR and MAPK signal pathway; 4) GelMA-hypoCM accelerated wound healing and angiogenesis in aged skin in vivo. CONCLUSION GelMA loaded with concentrated hypoxic pretreated adipose-derived mesenchymal stem cells conditioned medium could accelerate wound healing in aged skin by promoting angiogenesis.
Collapse
Affiliation(s)
- Shiyi Li
- grid.414252.40000 0004 1761 8894Senior Department of Burns and Plastic Surgery, The Fourth Medical Center of Chinese PLA General Hospital, No. 51 Fucheng Road, Haidian District, Beijing, 100038 China ,grid.488137.10000 0001 2267 2324Chinese PLA Medical School, Beijing, 100853 China
| | - Jiachen Sun
- grid.414252.40000 0004 1761 8894Senior Department of Burns and Plastic Surgery, The Fourth Medical Center of Chinese PLA General Hospital, No. 51 Fucheng Road, Haidian District, Beijing, 100038 China ,grid.411472.50000 0004 1764 1621Department of Dermatology and Venerology, Peking University First Hospital, Beijing, 100034 China
| | - Jinxiu Yang
- grid.414252.40000 0004 1761 8894Senior Department of Burns and Plastic Surgery, The Fourth Medical Center of Chinese PLA General Hospital, No. 51 Fucheng Road, Haidian District, Beijing, 100038 China ,grid.506261.60000 0001 0706 78397th Department of Plastic Surgery, Plastic Surgery Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100144 China
| | - Yi Yang
- grid.414252.40000 0004 1761 8894Senior Department of Burns and Plastic Surgery, The Fourth Medical Center of Chinese PLA General Hospital, No. 51 Fucheng Road, Haidian District, Beijing, 100038 China ,grid.488137.10000 0001 2267 2324Chinese PLA Medical School, Beijing, 100853 China
| | - Hongfan Ding
- grid.414252.40000 0004 1761 8894Senior Department of Burns and Plastic Surgery, The Fourth Medical Center of Chinese PLA General Hospital, No. 51 Fucheng Road, Haidian District, Beijing, 100038 China ,grid.488137.10000 0001 2267 2324Chinese PLA Medical School, Beijing, 100853 China
| | - Boya Yu
- grid.414252.40000 0004 1761 8894Senior Department of Burns and Plastic Surgery, The Fourth Medical Center of Chinese PLA General Hospital, No. 51 Fucheng Road, Haidian District, Beijing, 100038 China ,grid.488137.10000 0001 2267 2324Chinese PLA Medical School, Beijing, 100853 China
| | - Kui Ma
- grid.414252.40000 0004 1761 8894Research Center for Tissue Repair and Regeneration Affiliated to the Medical Innovation Research Division, Chinese PLA General Hospital, Beijing, 100048 China
| | - Minliang Chen
- Senior Department of Burns and Plastic Surgery, The Fourth Medical Center of Chinese PLA General Hospital, No. 51 Fucheng Road, Haidian District, Beijing, 100038, China.
| |
Collapse
|
9
|
Abstract
Pregnancy complications affect millions of women each year. Some of these diseases have high morbidity and mortality such as preeclampsia. At present, there is no safe and effective treatment for pregnancy complications, so it is still a difficult clinical problem. As many pregnancy complications are closely related to placental dysplasia, placenta-specific therapy, as an important method, is expected to be a safe, effective, and specific therapeutic strategy. This review explains in detail the placenta physiological structure, characteristics, and action mechanism of some biomolecules and signaling pathways that play roles in normal development and disorders of the development of the placenta, and how to use these biomolecules as therapeutic targets when the placenta disorder causes disease, combining the latest progress in the field of nanodelivery systems, so as to lay a foundation for the development of placenta-specific therapy of pregnancy complications.
Collapse
Affiliation(s)
- Yang Liu
- School of Pharmaceutical Sciences, Zhengzhou University, No. 100, Kexue Avenue, Zhengzhou, 450001, China
| | - Xingli Gao
- School of Pharmaceutical Sciences, Zhengzhou University, No. 100, Kexue Avenue, Zhengzhou, 450001, China
| | - Songwei Gao
- School of Pharmaceutical Sciences, Zhengzhou University, No. 100, Kexue Avenue, Zhengzhou, 450001, China.,Department of Pharmacy, First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, Henan, China
| | - Yu Song
- School of Pharmacy, Xinxiang Medical University, Xinxiang, 453003, China
| | - Yongran Guo
- School of Pharmaceutical Sciences, Zhengzhou University, No. 100, Kexue Avenue, Zhengzhou, 450001, China
| | - Jing Cao
- Department of Pathology, The Third Affiliated Hospital of Zhenzhou University, Zhengzhou, 450001, China
| |
Collapse
|
10
|
Ramchandran R. Endothelial cells and their role in the vasculature: Past, present and future. Front Cell Dev Biol 2022; 10:994133. [PMID: 36187473 PMCID: PMC9520988 DOI: 10.3389/fcell.2022.994133] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Accepted: 08/11/2022] [Indexed: 12/03/2022] Open
|
11
|
Luo X, Li RR, Li YQ, Yu HP, Yu HN, Jiang WG, Li YN. Reducing VEGFB expression regulates the balance of glucose and lipid metabolism in mice via VEGFR1. Mol Med Rep 2022; 26:285. [PMID: 35894135 PMCID: PMC9366154 DOI: 10.3892/mmr.2022.12801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Accepted: 06/17/2022] [Indexed: 11/05/2022] Open
Abstract
In recent years, studies have demonstrated that vascular endothelial growth factor B (VEGFB) can affect the metabolism of fatty acids and glucose, and it is expected to become a target for the diagnosis and treatment of metabolic diseases such as obesity and diabetes. At present, the specific mechanism that VEGFB regulates lipid and glucose metabolism balance is not completely understood. The present study used systemic VEGFB gene-knockout mice to investigate the effects of downregulation of the VEGFB gene on lipid metabolism and insulin secretion, and to explore the mechanism of the VEGFB pathway involved in the regulation of glucose and lipid metabolism. The morphological changes in the liver and pancreas of mice after VEGFB gene deletion were observed under a light microscope and a scanning electron microscope, and the effects of VEGFB gene deletion on lipid metabolism and blood glucose balance were detected by a serological technique. The detection indexes included total cholesterol (TC), triglyceride (TG), low-density lipoprotein cholesterol (LDL-C) and high-density lipoprotein cholesterol. Simultaneously, fasting blood glucose, glycosylated hemoglobin A1c (HbA1c), fasting insulin and glucagon were measured. Insulin sensitivity was assessed by using the insulin tolerance tests and glucose tolerance tests, and function of β-cell islets was evaluated by using the insulin resistance index (HOMA-IR) and pancreatic β-cell secretion index (HOMA-β). Τhe protein expression changes of vascular endothelial growth factor receptor 1 (VEGFR1) and vascular endothelial growth factor receptor 2 (VEGFR2) in mouse islets were detected by western blotting and reverse transcription-quantitative polymerase chain reaction (RT-qPCR) after the VEGFB gene was knocked down to analyze the mechanism of VEGFB that may be involved in glucose and lipid metabolism. It was observed that after VEGFB was knocked down, mouse hepatocytes exhibited steatosis and increased secretory vesicles in islet cells. The lipid metabolism indexes such as TG, TC and LDL increased significantly; however, the levels of FBS, postprandial blood glucose and HbA1c decreased, whereas the glucose tolerance increased. Serum insulin secretion increased and HOMA-IR decreased since VEGFB was knocked down. Western blotting and RT-qPCR results revealed that the expression levels of VEGFR1 and neuropilin-1 decreased after the VEGFB gene was knocked down, while the expression levels of VEGFA and VEGFR2 increased. The absence of VEGFB may be involved in the regulation of glucose and lipid metabolism in mice by activating the VEGFA/VEGFR2 signaling pathway. VEGFB is expected to become a new target for the treatment of metabolic diseases such as obesity and diabetes. At present, the mechanism of VEGFB involved in regulating lipid metabolism and glucose metabolism is not completely clear. It was identified that downregulating VEGFB improved lipid metabolism and insulin resistance. The role of VEGFB/VEGFR1 pathway and other family members in regulating glucose and lipid metabolism was detected, which provided a theoretical and experimental basis for VEGFB to affect the regulation of glucose and lipid metabolism balance.
Collapse
Affiliation(s)
- Xu Luo
- Department of Pathophysiology, School of Basic Medicine, Binzhou Medical University, Yantai, Shandong 264003, P.R. China
| | - Rong-Rong Li
- Department of Pathophysiology, School of Basic Medicine, Binzhou Medical University, Yantai, Shandong 264003, P.R. China
| | - Yu-Qi Li
- Department of Pathophysiology, School of Basic Medicine, Binzhou Medical University, Yantai, Shandong 264003, P.R. China
| | - Han-Pu Yu
- Clinical Medicine, School of Basic Medicine, Binzhou Medical University, Yantai, Shandong 264003, P.R. China
| | - Hai-Ning Yu
- Department of Stomatology Medicine, School of Oral Medicine, Binzhou Medical University, Yantai, Shandong 264003, P.R. China
| | - Wen-Guo Jiang
- Department of Pharmacy, Binzhou Medical University, Yantai, Shandong 264003, P.R. China
| | - Ya-Na Li
- Department of Pathophysiology, School of Basic Medicine, Binzhou Medical University, Yantai, Shandong 264003, P.R. China
| |
Collapse
|
12
|
The Role of Urinary VEGF in Observational Studies of BPS/IC Patients: A Systematic Review. Diagnostics (Basel) 2022; 12:diagnostics12051037. [PMID: 35626193 PMCID: PMC9139518 DOI: 10.3390/diagnostics12051037] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Revised: 04/06/2022] [Accepted: 04/19/2022] [Indexed: 02/04/2023] Open
Abstract
Background: Bladder pain syndrome/interstitial cystitis (BPS/IC) is a chronic pain condition, often underdiagnosed, with an important impact on patient quality of life. More recently, an association between VEGF and its receptors has been suggested in BPS/IC pathophysiology, due to their role in promoting angiogenesis and inflammation, which can enhance bladder pain. Eventually, VEGF may be used as a biomarker for the diagnosis and prognostication of BPS/IC. To further clarify this issue, this review aims to critically summarize the available information, giving rise to a solid starting point for future studies. Methods: We systematically searched PubMed and Embase, using the queries “urinary VEGF”, “urinary VEGF” AND “pain”, “urinary VEGF” AND “lower urinary tract symptoms” and “urinary VEGF” AND “LUTS” from January 2016 to February 2022. Results: A total of 1026 papers were identified from which 7 articles were included in this study, which assessed 1036 participants. Regarding VEGF levels, overactive bladder (OAB) and healthy patients were used for comparison with BPS/IC patients. VEGF concentration seems to be higher when compared to healthy patients and overactive bladder (OAB) patients. Higher levels of VEGF were associated with pain severity, while a decrease in VEGF concentration was associated with pain and symptom improvement in women. However, these findings were not constant in all studies. Conclusions: There is a trend toward a relevant association between increased VEGF levels and pain or symptom severity in BPS/IC patients. Although there are some discrepancies among the studies and the number of patients included is small, VEGF and its receptors should be considered for future studies regarding its use in BPS/IC pathophysiology, diagnosis and prognostication.
Collapse
|
13
|
Lange M, Ohnesorge N, Hoffmann D, Rocha SF, Benedito R, Siekmann AF. Zebrafish mutants in vegfab can affect endothelial cell proliferation without altering ERK phosphorylation and are phenocopied by loss of PI3K signaling. Dev Biol 2022; 486:26-43. [PMID: 35337795 DOI: 10.1016/j.ydbio.2022.03.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Revised: 03/16/2022] [Accepted: 03/17/2022] [Indexed: 12/23/2022]
Abstract
The formation of appropriately patterned blood vessel networks requires endothelial cell migration and proliferation. Signaling through the Vascular Endothelial Growth Factor A (VEGFA) pathway is instrumental in coordinating these processes. mRNA splicing generates short (diffusible) and long (extracellular matrix bound) Vegfa isoforms. The differences between these isoforms in controlling cellular functions are not understood. In zebrafish, vegfaa generates short and long isoforms, while vegfab only generates long isoforms. We found that mutations in vegfaa had an impact on endothelial cell (EC) migration and proliferation. Surprisingly, mutations in vegfab more strongly affected EC proliferation in distinct blood vessels, such as intersegmental blood vessels in the zebrafish trunk and central arteries in the head. Analysis of downstream signaling pathways revealed no change in MAPK (ERK) activation, while inhibiting PI3 kinase signaling phenocopied vegfab mutant phenotypes in affected blood vessels. Together, these results suggest that extracellular matrix bound Vegfa might act through PI3K signaling to control EC proliferation in a distinct set of blood vessels during angiogenesis.
Collapse
Affiliation(s)
- Martin Lange
- Max Planck Institute for Molecular Biomedicine, Roentgenstrasse 20, D-48149, Muenster, Germany; Cells-in-Motion Cluster of Excellence (EXC 1003 - CiM), University of Muenster, Muenster, Germany
| | - Nils Ohnesorge
- Max Planck Institute for Molecular Biomedicine, Roentgenstrasse 20, D-48149, Muenster, Germany; Cells-in-Motion Cluster of Excellence (EXC 1003 - CiM), University of Muenster, Muenster, Germany
| | - Dennis Hoffmann
- Max Planck Institute for Molecular Biomedicine, Roentgenstrasse 20, D-48149, Muenster, Germany; Cells-in-Motion Cluster of Excellence (EXC 1003 - CiM), University of Muenster, Muenster, Germany
| | - Susana F Rocha
- Centro Nacional de Investigaciones Cardiovasculares (CNIC), Madrid, E28029, Spain
| | - Rui Benedito
- Centro Nacional de Investigaciones Cardiovasculares (CNIC), Madrid, E28029, Spain
| | - Arndt F Siekmann
- Max Planck Institute for Molecular Biomedicine, Roentgenstrasse 20, D-48149, Muenster, Germany; Cells-in-Motion Cluster of Excellence (EXC 1003 - CiM), University of Muenster, Muenster, Germany; Department of Cell and Developmental Biology and Cardiovascular Institute, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA.
| |
Collapse
|
14
|
Xing C, Jiang Z, Wang Y. Downregulation of NAGLU in VEC Increases Abnormal Accumulation of Lysosomes and Represents a Predictive Biomarker in Early Atherosclerosis. Front Cell Dev Biol 2022; 9:797047. [PMID: 35155448 PMCID: PMC8826576 DOI: 10.3389/fcell.2021.797047] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Accepted: 12/27/2021] [Indexed: 12/23/2022] Open
Abstract
Cardiovascular diseases (CVDs), predominantly caused by atherosclerosis (AS), are the leading cause of mortality worldwide. Although a great number of previous studies have attempted to reveal the molecular mechanism of AS, the underlying mechanism has not been fully elucidated. The aberrant expression profiling of vascular endothelial cells (VECs) gene in early atherosclerosis (EAS) was analyzed according to the dataset (GSE132651) downloaded from the Gene Expression Omnibus (GEO) database. We primarily performed functional annotation analysis on the downregulated genes (DRGs). We further identified that α-N-acetylglucosaminidase (NAGLU), one of the DRGs, played a critical role in the progression of EAS. NAGLU is a key enzyme for the degradation of heparan sulfate (HS), and its deficiency could cause lysosomal accumulation and lead to dysfunctions of VECs. We found that siRNA knockdown of NAGLU in human umbilical vein endothelial cell (HUVEC) aggravated the abnormal accumulation of lysosomes and HS. In addition, the expression of NAGLU was reduced in the EAS model constructed by ApoE−/- mice. Furthermore, we also showed that heparin-binding EGF-like growth factor (HB-EGF) protein was upregulated while NAGLU knockdown in HUVEC could specifically bind to vascular endothelial growth factor receptor 2 (VEGFR2) and promote its phosphorylation, ultimately activating the phosphorylation levels of extracellular signal-regulated kinases (ERKs). However, the application of selective VEGFR2 and ERKs inhibitors, SU5614 and PD98059, respectively, could reverse the abnormal lysosomal storage caused by NAGLU knockdown. These results indicated that downregulation of NAGLU in HUVEC increases the abnormal accumulation of lysosomes and may be a potential biomarker for the diagnosis of EAS.
Collapse
Affiliation(s)
- Changchang Xing
- Department of Cardiology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Zhongyi Jiang
- Department of General Surgery, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yi Wang
- Department of Cardiology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- *Correspondence: Yi Wang,
| |
Collapse
|
15
|
Lee HK, Lee SM, Lee DI. Corneal Lymphangiogenesis: Current Pathophysiological Understandings and Its Functional Role in Ocular Surface Disease. Int J Mol Sci 2021; 22:ijms222111628. [PMID: 34769057 PMCID: PMC8583961 DOI: 10.3390/ijms222111628] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Revised: 10/19/2021] [Accepted: 10/23/2021] [Indexed: 12/23/2022] Open
Abstract
The cornea is a transparent and avascular tissue that plays a central role in light refraction and provides a physical barrier to the external environment. Corneal avascularity is a unique histological feature that distinguishes it from the other parts of the body. Functionally, corneal immune privilege critically relies on corneal avascularity. Corneal lymphangiogenesis is now recognized as a general pathological feature in many pathologies, including dry eye disease (DED), corneal allograft rejection, ocular allergy, bacterial and viral keratitis, and transient corneal edema. Currently, sizable data from clinical and basic research have accumulated on the pathogenesis and functional role of ocular lymphangiogenesis. However, because of the invisibility of lymphatic vessels, ocular lymphangiogenesis has not been studied as much as hemangiogenesis. We reviewed the basic mechanisms of lymphangiogenesis and summarized recent advances in the pathogenesis of ocular lymphangiogenesis, focusing on corneal allograft rejection and DED. In addition, we discuss future directions for lymphangiogenesis research.
Collapse
Affiliation(s)
- Hyung-Keun Lee
- Department of Ophthalmology, Institute of Vision Research, Yonsei University College of Medicine, Seoul 06273, Korea
- Correspondence: ; Tel.: +82-2-2019-3444
| | - Sang-Mok Lee
- Department of Ophthalmology, HanGil Eye Hospital, Catholic Kwandong University College of Medicine, Incheon 21388, Korea;
| | - Dong-Ihll Lee
- Medical School, Capital Medical University, Beijing 100069, China;
| |
Collapse
|
16
|
Twible C, Abdo R, Zhang Q. Astrocyte Role in Temporal Lobe Epilepsy and Development of Mossy Fiber Sprouting. Front Cell Neurosci 2021; 15:725693. [PMID: 34658792 PMCID: PMC8514632 DOI: 10.3389/fncel.2021.725693] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Accepted: 09/02/2021] [Indexed: 11/13/2022] Open
Abstract
Epilepsy affects approximately 50 million people worldwide, with 60% of adult epilepsies presenting an onset of focal origin. The most common focal epilepsy is temporal lobe epilepsy (TLE). The role of astrocytes in the presentation and development of TLE has been increasingly studied and discussed within the literature. The most common histopathological diagnosis of TLE is hippocampal sclerosis. Hippocampal sclerosis is characterized by neuronal cell loss within the Cornu ammonis and reactive astrogliosis. In some cases, mossy fiber sprouting may be observed. Mossy fiber sprouting has been controversial in its contribution to epileptogenesis in TLE patients, and the mechanisms surrounding the phenomenon have yet to be elucidated. Several studies have reported that mossy fiber sprouting has an almost certain co-existence with reactive astrogliosis within the hippocampus under epileptic conditions. Astrocytes are known to play an important role in the survival and axonal outgrowth of central and peripheral nervous system neurons, pointing to a potential role of astrocytes in TLE and associated cellular alterations. Herein, we review the recent developments surrounding the role of astrocytes in the pathogenic process of TLE and mossy fiber sprouting, with a focus on proposed signaling pathways and cellular mechanisms, histological observations, and clinical correlations in human patients.
Collapse
Affiliation(s)
- Carolyn Twible
- Department of Pathology and Lab Medicine, Western University, London, ON, Canada
| | - Rober Abdo
- Department of Pathology and Lab Medicine, Western University, London, ON, Canada.,Department of Anatomy and Cell Biology, Western University, London, ON, Canada
| | - Qi Zhang
- Department of Pathology and Lab Medicine, Western University, London, ON, Canada.,Department of Pathology and Lab Medicine, London Health Sciences Centre, University Hospital, London, ON, Canada
| |
Collapse
|
17
|
Wazzani R, Pallu S, Bourzac C, Ahmaïdi S, Portier H, Jaffré C. Physical Activity and Bone Vascularization: A Way to Explore in Bone Repair Context? Life (Basel) 2021; 11:life11080783. [PMID: 34440527 PMCID: PMC8399402 DOI: 10.3390/life11080783] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Revised: 06/11/2021] [Accepted: 07/21/2021] [Indexed: 01/15/2023] Open
Abstract
Physical activity is widely recognized as a biotherapy by WHO in the fight and prevention of bone diseases such as osteoporosis. It reduces the risk of disabling fractures associated with many comorbidities, and whose repair is a major public health and economic issue. Bone tissue is a dynamic supportive tissue that reshapes itself according to the mechanical stresses to which it is exposed. Physical exercise is recognized as a key factor for bone health. However, the effects of exercise on bone quality depend on exercise protocols, duration, intensity, and frequency. Today, the effects of different exercise modalities on capillary bone vascularization, bone blood flow, and bone angiogenesis remain poorly understood and unclear. As vascularization is an integral part of bone repair process, the analysis of the preventive and/or curative effects of physical exercise is currently very undeveloped. Angiogenesis–osteogenesis coupling may constitute a new way for understanding the role of physical activity, especially in fracturing or in the integration of bone biomaterials. Thus, this review aimed to clarify the link between physical activities, vascularization, and bone repair.
Collapse
Affiliation(s)
- Rkia Wazzani
- Laboratoire APERE, Université de Picardie Jules Verne, CEDEX, F-80000 Amiens, France; (R.W.); (S.A.)
| | - Stéphane Pallu
- Laboratoire B3OA, Université de Paris, CEDEX, F-75010 Paris, France; (S.P.); (C.B.); (H.P.)
- UFR Science & Technique, Université d’Orléans, CEDEX, F-45100 Orléans, France
| | - Céline Bourzac
- Laboratoire B3OA, Université de Paris, CEDEX, F-75010 Paris, France; (S.P.); (C.B.); (H.P.)
| | - Saïd Ahmaïdi
- Laboratoire APERE, Université de Picardie Jules Verne, CEDEX, F-80000 Amiens, France; (R.W.); (S.A.)
| | - Hugues Portier
- Laboratoire B3OA, Université de Paris, CEDEX, F-75010 Paris, France; (S.P.); (C.B.); (H.P.)
- UFR Science & Technique, Université d’Orléans, CEDEX, F-45100 Orléans, France
| | - Christelle Jaffré
- Laboratoire APERE, Université de Picardie Jules Verne, CEDEX, F-80000 Amiens, France; (R.W.); (S.A.)
- Laboratoire B3OA, Université de Paris, CEDEX, F-75010 Paris, France; (S.P.); (C.B.); (H.P.)
- Correspondence:
| |
Collapse
|
18
|
Jia JD, Jiang WG, Luo X, Li RR, Zhao YC, Tian G, Li YN. Vascular endothelial growth factor B inhibits insulin secretion in MIN6 cells and reduces Ca 2+ and cyclic adenosine monophosphate levels through PI3K/AKT pathway. World J Diabetes 2021; 12:480-498. [PMID: 33889292 PMCID: PMC8040075 DOI: 10.4239/wjd.v12.i4.480] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Revised: 01/25/2021] [Accepted: 03/08/2021] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Type 2 diabetes (T2D) is characterized by insufficient insulin secretion caused by defective pancreatic β-cell function or insulin resistance, resulting in an increase in blood glucose. However, the mechanism involved in this lack of insulin secretion is unclear. The level of vascular endothelial growth factor B (VEGF-B) is significantly increased in T2D patients. The inactivation of VEGF-B could restore insulin sensitivity in db/db mice by reducing fatty acid accumulation. It is speculated that VEGF-B is related to pancreatic β-cell dysfunction and is an important factor affecting β-cell secretion of insulin. As an in vitro model of normal pancreatic β-cells, the MIN6 cell line can be used to analyze the mechanism of insulin secretion and related biological effects.
AIM To study the role of VEGF-B in the insulin secretion signaling pathway in MIN6 cells and explore the effect of VEGF-B on blood glucose regulation.
METHODS The MIN6 mouse pancreatic islet β-cell line was used as the model system. By administering exogenous VEGF-B protein or knocking down VEGF-B expression in MIN6 cells, we examined the effects of VEGF-B on insulin secretion, Ca2+ and cyclic adenosine monophosphate (cAMP) levels, and the insulin secretion signaling pathway.
RESULTS Exogenous VEGF-B inhibited the secretion of insulin and simultaneously reduced the levels of Ca2+ and cAMP in MIN6 cells. Exogenous VEGF-B also reduced the expression of phospholipase C gamma 1 (PLCγ1), phosphatidylinositol 3-kinase (PI3K), serine/threonine kinase (AKT), and other proteins in the insulin secretion pathway. Upon knockdown of VEGF-B, MIN6 cells exhibited increased insulin secretion and Ca2+ and cAMP levels and upregulated expression of PLCγ1, PI3K, AKT, and other proteins.
CONCLUSION VEGF-B can regulate insulin secretion by modulating the levels of Ca2+ and cAMP. VEGF-B involvement in insulin secretion is related to the expression of PLCγ1, PI3K, AKT, and other signaling proteins. These results provide theoretical support and an experimental basis for the study of VEGF-B in the pathogenesis of T2D.
Collapse
Affiliation(s)
- Jing-Dan Jia
- Department of Pathophysiology, School of Basic Medicine, Binzhou Medical University, Yantai 264003, Shandong Province, China
| | - Wen-Guo Jiang
- Department of Pharmacy, Binzhou Medical University, Yantai 264003, Shandong Province, China
| | - Xu Luo
- Department of Pathophysiology, School of Basic Medicine, Binzhou Medical University, Yantai 264003, Shandong Province, China
| | - Rong-Rong Li
- Department of Pathophysiology, School of Basic Medicine, Binzhou Medical University, Yantai 264003, Shandong Province, China
| | - Yu-Chi Zhao
- Department of Surgery, Yantaishan Hospital, Yantai 264001, Shandong Province, China
| | - Geng Tian
- Department of Pharmacy, Binzhou Medical University, Yantai 264003, Shandong Province, China
| | - Ya-Na Li
- Department of Pathophysiology, School of Basic Medicine, Binzhou Medical University, Yantai 264003, Shandong Province, China
| |
Collapse
|
19
|
Lauretta G, Ravalli S, Maugeri G, D'Agata V, Rosa MD, Musumeci G. The impact of physical exercise on hippocampus, in physiological condition and ageing-related decline: current evidence from animal and human studies. Curr Pharm Biotechnol 2021; 23:180-189. [PMID: 33820516 DOI: 10.2174/1389201022666210405142611] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Revised: 01/19/2021] [Accepted: 02/14/2021] [Indexed: 11/22/2022]
Abstract
Physical exercise (PE), notoriously, promotes a state of general well-being, throughout the entire human lifespan. Moreover, maintaining an adequate and regular PE habit results to be a powerful preventive factor towards many diseases and may also help in managing existing pathological conditions. PE induces structural and functional changes in various districts of the body, determining biological and psychological benefits. Additionally, in elderly, PE might represent a remarkable tool reducing cognitive impairments related to the normal aging processes and it has also been found to have an impact in neurodegenerative diseases such as Alzheimer's disease. The present review aims to provide an overview about PE effects on hippocampus, since it is one of the brain regions most susceptible to aging and, therefore, involved in diseases characterized by cognitive impairment.
Collapse
Affiliation(s)
- Giovanni Lauretta
- Department of Biomedical and Biotechnological Sciences, Human, Histology and Movement Science Section, University of Catania, Via S. Sofia n°87, Catania. Italy
| | - Silvia Ravalli
- Department of Biomedical and Biotechnological Sciences, Human, Histology and Movement Science Section, University of Catania, Via S. Sofia n°87, Catania. Italy
| | - Grazia Maugeri
- Department of Biomedical and Biotechnological Sciences, Human, Histology and Movement Science Section, University of Catania, Via S. Sofia n°87, Catania. Italy
| | - Velia D'Agata
- Department of Biomedical and Biotechnological Sciences, Human, Histology and Movement Science Section, University of Catania, Via S. Sofia n°87, Catania. Italy
| | - Michelino Di Rosa
- Department of Biomedical and Biotechnological Sciences, Human, Histology and Movement Science Section, University of Catania, Via S. Sofia n°87, Catania. Italy
| | - Giuseppe Musumeci
- Department of Biomedical and Biotechnological Sciences, Human, Histology and Movement Science Section, University of Catania, Via S. Sofia n°87, Catania. Italy
| |
Collapse
|
20
|
Shahik SM, Salauddin A, Hossain MS, Noyon SH, Moin AT, Mizan S, Raza MT. Screening of novel alkaloid inhibitors for vascular endothelial growth factor in cancer cells: an integrated computational approach. Genomics Inform 2021; 19:e6. [PMID: 33840170 PMCID: PMC8042301 DOI: 10.5808/gi.20068] [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: 11/24/2020] [Accepted: 02/11/2021] [Indexed: 12/26/2022] Open
Abstract
Vascular endothelial growth factor (VEGF) is expressed at elevated levels by most cancer cells, which can stimulate vascular endothelial cell growth, survival, proliferation as well as trigger angiogenesis modulated by VEGF and VEGFR (a tyrosine kinase receptor) signaling. The angiogenic effects of the VEGF family are thought to be primarily mediated through the interaction of VEGF with VEGFR-2. Targeting this signaling molecule and its receptor is a novel approach for blocking angiogenesis. In recent years virtual high throughput screening has emerged as a widely accepted powerful technique in the identification of novel and diverse leads. The high-resolution X-ray structure of VEGF has paved the way to introduce new small molecular inhibitors by structure-based virtual screening. In this study using different alkaloid molecules as potential novel inhibitors of VEGF, we proposed three alkaloid candidates for inhibiting VEGF and VEGFR mediated angiogenesis. As these three alkaloid compounds exhibited high scoring functions, which also highlights their high binding ability, it is evident that these alkaloids can be taken to further drug development pipelines for use as novel lead compounds to design new and effective drugs against cancer.
Collapse
Affiliation(s)
- Shah Md Shahik
- Molecular Biology Department, AFC Agro Biotech Ltd., Dhaka 1212, Bangladesh.,Bioinformatics Division, Disease Biology and Molecular Epidemiology Research Group (dBme), Chattogram 4202, Bangladesh
| | - Asma Salauddin
- Bioinformatics Division, Disease Biology and Molecular Epidemiology Research Group (dBme), Chattogram 4202, Bangladesh.,Department of Genetic Engineering and Biotechnology, Faculty of Biological Sciences, University of Chittagong, Chattogram 4331, Bangladesh
| | - Md Shakhawat Hossain
- Bioinformatics Division, Disease Biology and Molecular Epidemiology Research Group (dBme), Chattogram 4202, Bangladesh.,Department of Genetic Engineering and Biotechnology, Faculty of Biological Sciences, University of Chittagong, Chattogram 4331, Bangladesh
| | - Sajjad Hossain Noyon
- Bioinformatics Division, Disease Biology and Molecular Epidemiology Research Group (dBme), Chattogram 4202, Bangladesh.,Department of Genetic Engineering and Biotechnology, Faculty of Biological Sciences, University of Chittagong, Chattogram 4331, Bangladesh
| | - Abu Tayab Moin
- Department of Genetic Engineering and Biotechnology, Faculty of Biological Sciences, University of Chittagong, Chattogram 4331, Bangladesh
| | - Shagufta Mizan
- Department of Genetic Engineering and Biotechnology, Faculty of Biological Sciences, University of Chittagong, Chattogram 4331, Bangladesh
| | - Md Thosif Raza
- Department of Genetic Engineering and Biotechnology, Faculty of Biological Sciences, University of Chittagong, Chattogram 4331, Bangladesh
| |
Collapse
|
21
|
Ma R, Xie Q, Li H, Guo X, Wang J, Li Y, Ren M, Gong D, Gao T. l-Borneol Exerted the Neuroprotective Effect by Promoting Angiogenesis Coupled With Neurogenesis via Ang1-VEGF-BDNF Pathway. Front Pharmacol 2021; 12:641894. [PMID: 33746762 PMCID: PMC7973462 DOI: 10.3389/fphar.2021.641894] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Accepted: 01/25/2021] [Indexed: 12/14/2022] Open
Abstract
At present, Stroke is still one of the leading causes of population death worldwide and leads to disability. Traditional Chinese medicine plays an important role in the prevention or treatment of stroke. l-borneol, a traditional Chinese medicine, has been used in China to treat stroke for thousands of years. However, its mechanism of action is unclear. After cerebral ischemia, promoting angiogenesis after cerebral ischemia and providing nutrition for the infarct area is an important strategy to improve the damage in the ischemic area, but it is also essential to promote neurogenesis and replenish new neurons. Here, our research shows that l-borneol can significantly improve the neurological deficits of pMCAO model rats, reduce cerebral infarction, and improve the pathological damage of cerebral ischemia. and significantly increase serum level of Ang-1 and VEGF, and significantly decrease level of ACE and Tie2 to promote angiogenesis. PCR and WB showed the same results. Immunohistochemistry also showed that l-borneol can increase the number of CD34 positive cells, further verifying that l-borneol can play a neuroprotective effect by promoting angiogenesis after cerebral ischemia injury. In addition, l-borneol can significantly promote the expression level of VEGF, BDNF and inhibit the expression levels of TGF-β1 and MMP9 to promote neurogenesis. The above suggests that l-borneol can promote angiogenesis coupled neurogenesis by regulating Ang1-VEGF-BDNF to play a neuroprotective effect. Molecular docking also shows that l-borneol has a very high binding rate with the above target, which further confirmed the target of l-borneol to improve cerebral ischemic injury. These results provide strong evidence for the treatment of cerebral ischemia with l-borneol and provide reference for future research.
Collapse
Affiliation(s)
- Rong Ma
- State Key Laboratory of Southwestern Chinese Medicine Resources, Chengdu, China.,School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Qian Xie
- State Key Laboratory of Southwestern Chinese Medicine Resources, Chengdu, China.,School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Hongyan Li
- State Key Laboratory of Southwestern Chinese Medicine Resources, Chengdu, China.,School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Xiaoqing Guo
- State Key Laboratory of Southwestern Chinese Medicine Resources, Chengdu, China.,School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Jian Wang
- State Key Laboratory of Southwestern Chinese Medicine Resources, Chengdu, China.,School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Yong Li
- State Key Laboratory of Southwestern Chinese Medicine Resources, Chengdu, China.,School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Mihong Ren
- State Key Laboratory of Southwestern Chinese Medicine Resources, Chengdu, China.,School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Daoyin Gong
- Department of Pathology, Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Tian Gao
- Department of Pathology, Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, China.,Adverse Reaction Monitoring Center, Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, China
| |
Collapse
|
22
|
Maietta V, Reyes-García J, Yadav VR, Zheng YM, Peng X, Wang YX. Cellular and Molecular Processes in Pulmonary Hypertension. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2021; 1304:21-38. [PMID: 34019261 DOI: 10.1007/978-3-030-68748-9_2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Pulmonary hypertension (PH) is a progressive lung disease characterized by persistent pulmonary vasoconstriction. Another well-recognized characteristic of PH is the muscularization of peripheral pulmonary arteries. This pulmonary vasoremodeling manifests in medial hypertrophy/hyperplasia of smooth muscle cells (SMCs) with possible neointimal formation. The underlying molecular processes for these two major vascular responses remain not fully understood. On the other hand, a series of very recent studies have shown that the increased reactive oxygen species (ROS) seems to be an important player in mediating pulmonary vasoconstriction and vasoremodeling, thereby leading to PH. Mitochondria are a primary site for ROS production in pulmonary artery (PA) SMCs, which subsequently activate NADPH oxidase to induce further ROS generation, i.e., ROS-induced ROS generation. ROS control the activity of multiple ion channels to induce intracellular Ca2+ release and extracellular Ca2+ influx (ROS-induced Ca2+ release and influx) to cause PH. ROS and Ca2+ signaling may synergistically trigger an inflammatory cascade to implicate in PH. Accordingly, this paper explores the important roles of ROS, Ca2+, and inflammatory signaling in the development of PH, including their reciprocal interactions, key molecules, and possible therapeutic targets.
Collapse
Affiliation(s)
- Vic Maietta
- Department of Molecular & Cellular Physiology, Albany Medical College, Albany, NY, USA
| | - Jorge Reyes-García
- Department of Molecular & Cellular Physiology, Albany Medical College, Albany, NY, USA.,Departamento de Farmacología, Facultad de Medicina, Universidad Nacional Autónoma de México, Ciudad de México, Mexico
| | - Vishal R Yadav
- Department of Molecular & Cellular Physiology, Albany Medical College, Albany, NY, USA
| | - Yun-Min Zheng
- Department of Molecular & Cellular Physiology, Albany Medical College, Albany, NY, USA.
| | - Xu Peng
- Department of Medical Physiology, College of Medicine, Texas A&M University, College Station, TX, USA.
| | - Yong-Xiao Wang
- Department of Molecular & Cellular Physiology, Albany Medical College, Albany, NY, USA.
| |
Collapse
|
23
|
Ricard N, Bailly S, Guignabert C, Simons M. The quiescent endothelium: signalling pathways regulating organ-specific endothelial normalcy. Nat Rev Cardiol 2021; 18:565-580. [PMID: 33627876 PMCID: PMC7903932 DOI: 10.1038/s41569-021-00517-4] [Citation(s) in RCA: 100] [Impact Index Per Article: 33.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 01/18/2021] [Indexed: 02/07/2023]
Abstract
Endothelial cells are at the interface between circulating blood and tissues. This position confers on them a crucial role in controlling oxygen and nutrient exchange and cellular trafficking between blood and the perfused organs. The endothelium adopts a structure that is specific to the needs and function of each tissue and organ and is subject to tissue-specific signalling input. In adults, endothelial cells are quiescent, meaning that they are not proliferating. Quiescence was considered to be a state in which endothelial cells are not stimulated but are instead slumbering and awaiting activating signals. However, new evidence shows that quiescent endothelium is fully awake, that it constantly receives and initiates functionally important signalling inputs and that this state is actively regulated. Signalling pathways involved in the maintenance of functionally quiescent endothelia are starting to be identified and are a combination of endocrine, autocrine, paracrine and mechanical inputs. The paracrine pathways confer a microenvironment on the endothelial cells that is specific to the perfused organs and tissues. In this Review, we present the current knowledge of organ-specific signalling pathways involved in the maintenance of endothelial quiescence and the pathologies associated with their disruption. Linking organ-specific pathways and human vascular pathologies will pave the way towards the development of innovative preventive strategies and the identification of new therapeutic targets.
Collapse
Affiliation(s)
- Nicolas Ricard
- grid.47100.320000000419368710Yale Cardiovascular Research Center, Department of Internal Medicine, Yale University School of Medicine, New Haven, CT USA
| | - Sabine Bailly
- grid.457348.9Université Grenoble Alpes, INSERM, CEA, BIG-Biologie du Cancer et de l’Infection, Grenoble, France
| | - Christophe Guignabert
- grid.414221.0INSERM UMR_S 999, Pulmonary Hypertension: Pathophysiology and Novel Therapies, Hôpital Marie Lannelongue, Le Plessis-Robinson, France ,grid.460789.40000 0004 4910 6535Université Paris-Saclay, Faculté de Médecine, Le Kremlin-Bicêtre, France
| | - Michael Simons
- grid.47100.320000000419368710Yale Cardiovascular Research Center, Department of Internal Medicine, Yale University School of Medicine, New Haven, CT USA ,grid.47100.320000000419368710Department of Cell Biology, Yale University School of Medicine, New Haven, CT USA
| |
Collapse
|
24
|
Russ KA, Thompson JA, Reynolds JS, Mercer RR, Porter DW, McKinney W, Dey RD, Barger M, Cumpston J, Batchelor TP, Kashon ML, Kodali V, Jackson MC, Sriram K, Fedan JS. Biological effects of inhaled hydraulic fracturing sand dust. IV. Pulmonary effects. Toxicol Appl Pharmacol 2020; 409:115284. [PMID: 33068619 PMCID: PMC7736927 DOI: 10.1016/j.taap.2020.115284] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Revised: 10/07/2020] [Accepted: 10/10/2020] [Indexed: 01/12/2023]
Abstract
Hydraulic fracturing creates fissures in subterranean rock to increase the flow and retrieval of natural gas. Sand ("proppant") in fracking fluid injected into the well bore maintains fissure patency. Fracking sand dust (FSD) is generated during manipulation of sand to prepare the fracking fluid. Containing respirable crystalline silica, FSD could pose hazards similar to those found in work sites where silica inhalation induces lung disease such as silicosis. This study was performed to evaluate the possible toxic effects following inhalation of a FSD (FSD 8) in the lung and airways. Rats were exposed (6 h/d × 4 d) to 10 or 30 mg/m3 of a FSD collected at a gas well, and measurements were performed 1, 7, 27 and, in one series of experiments, 90 d post-exposure. The following ventilatory and non-ventilatory parameters were measured in vivo and/or in vitro: 1) lung mechanics (respiratory system resistance and elastance, tissue damping, tissue elastance, Newtonian resistance and hysteresivity); 2) airway reactivity to inhaled methacholine (MCh); airway epithelium integrity (isolated, perfused trachea); airway efferent motor nerve activity (electric field stimulation in vitro); airway smooth muscle contractility; ion transport in intact and cultured epithelium; airway effector and sensory nerves; tracheal particle deposition; and neurogenic inflammation/vascular permeability. FSD 8 was without large effect on most parameters, and was not pro-inflammatory, as judged histologically and in cultured epithelial cells, but increased reactivity to inhaled MCh at some post-exposure time points and affected Na+ transport in airway epithelial cells.
Collapse
Affiliation(s)
- Kristen A Russ
- Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, WV 26505, United States of America
| | - Janet A Thompson
- Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, WV 26505, United States of America
| | - Jeffrey S Reynolds
- Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, WV 26505, United States of America
| | - Robert R Mercer
- Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, WV 26505, United States of America
| | - Dale W Porter
- Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, WV 26505, United States of America
| | - Walter McKinney
- Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, WV 26505, United States of America
| | - Richard D Dey
- Department of Physiology and Pharmacology, Anatomy and Laboratory Medicine, Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV 26506, United States of America; Department of Pathology, Anatomy and Laboratory Medicine, Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV 26506, United States of America
| | - Mark Barger
- Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, WV 26505, United States of America
| | - Jared Cumpston
- Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, WV 26505, United States of America
| | - Thomas P Batchelor
- Department of Physiology and Pharmacology, Anatomy and Laboratory Medicine, Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV 26506, United States of America; Department of Pathology, Anatomy and Laboratory Medicine, Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV 26506, United States of America
| | - Michael L Kashon
- Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, WV 26505, United States of America
| | - Vamsi Kodali
- Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, WV 26505, United States of America
| | - Mark C Jackson
- Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, WV 26505, United States of America
| | - Krishnan Sriram
- Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, WV 26505, United States of America
| | - Jeffrey S Fedan
- Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, WV 26505, United States of America.
| |
Collapse
|
25
|
Activating CD137 Signaling Promotes Sprouting Angiogenesis via Increased VEGFA Secretion and the VEGFR2/Akt/eNOS Pathway. Mediators Inflamm 2020; 2020:1649453. [PMID: 33162828 PMCID: PMC7604604 DOI: 10.1155/2020/1649453] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2020] [Revised: 07/13/2020] [Accepted: 08/03/2020] [Indexed: 11/18/2022] Open
Abstract
Combination of antiangiogenesis and immunotherapy may be an effective strategy for treatment of solid tumors. Our previous work reported that activation of CD137 signaling promotes intraplaque angiogenesis. A number of studies have demonstrated that vascular endothelial growth factor receptor 2 (VEGFR2) is a key target for angiogenesis. However, it is unknown whether CD137-mediated angiogenesis is related to VEGFR2. In this study, we investigated the effect of CD137 on the VEGFR2 expression and explored the underlying mechanisms of CD137-mediated angiogenesis. Knock-out of CD137 in ApoE−/− mice significantly decreased neovessel density in atherosclerotic plaques. CD137 silencing or inhibition attenuated endothelial cell (ECs) proliferation, migration, and tube formation. We found activation of CD137 signaling for increased VEGFR2 transcription and translation steadily. Moreover, CD137 signaling activated phosphorylated VEGFR2 (Tyr1175) and the downstream Akt/eNOS pathway, whereas neutralizing CD137 signaling weakened the activation of VEGFR2 and the downstream Akt/eNOS pathway. The aortic ring assay further demonstrated that CD137 signaling promoted ECc sprouting. Inhibition of VEGFR2 by siRNA or XL184 (cabozantinib) and inhibition of downstream signaling by LY294002 (inhibits AKT activation) and L-NAME (eNOS inhibitor) remarkably abolished proangiogenic effects of CD137 signaling both in vitro and ex vivo. In addition, the condition medium from CD137-activated ECs and vascular endothelial growth factor A (VEGFA) had similar effects on ECs that expressed high VEGFR2. Additionally, activating CD137 signaling promoted endothelial secretion of VEGFA, while blocking CD137 signaling attenuated VEGFA secretion. In conclusion, activation of CD137 signaling promoted sprouting angiogenesis by increased VEGFA secretion and the VEGFR2/Akt/eNOS pathway. These findings provide a basis for stabilizing intraplaque angiogenesis through VEGFR2 intervatioin, as well as cancer treatment via combination of CD137 agonists and specific VEGFR2 inhibitors.
Collapse
|
26
|
Jeong KH, Cho KO, Lee MY, Kim SY, Kim WJ. Vascular endothelial growth factor receptor-3 regulates astroglial glutamate transporter-1 expression via mTOR activation in reactive astrocytes following pilocarpine-induced status epilepticus. Glia 2020; 69:296-309. [PMID: 32835451 DOI: 10.1002/glia.23897] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Revised: 07/19/2020] [Accepted: 07/22/2020] [Indexed: 12/13/2022]
Abstract
Recent evidence has shown that the vascular endothelial growth factor (VEGF) system plays a crucial role in several neuropathological processes. We previously reported an upregulation of VEGF-C and its receptor, VEGFR-3, in reactive astrocytes after the onset of status epilepticus (SE). However, it remains unknown, which molecules act as downstream signals following VEGFR-3 upregulation, and are involved in reactive astrogliosis after SE. Therefore, we investigated whether VEGFR-3 upregulation within reactive astrocytes is associated with the activation of mammalian target of rapamycin (mTOR) signaling, which we confirmed by assaying for the phosphorylated form of S6 protein (pS6), and whether VEGFR-3-mediated mTOR activation induces astroglial glutamate transporter-1 (GLT-1) expression in the hippocampus after pilocarpine-induced SE. We found that spatiotemporal expression of pS6 was consistent with VEGFR-3 expression in the hippocampus after SE, and that both pS6 and VEGFR-3 were highly expressed in SE-induced reactive astrocytes. Treatment with the mTOR inhibitor rapamycin decreased astroglial VEGFR-3 expression and GLT-1 expression after SE. Treatment with a selective inhibitor for VEGFR-3 attenuated astroglial pS6 expression as well as suppressed GLT-1 expression and astroglial reactivity in the hippocampus after SE. These findings demonstrate that VEGFR-3-mediated mTOR activation could contribute to the regulation of GLT-1 expression in reactive astrocytes during the subacute phase of epilepsy. In conclusion, the present study suggests that VEGFR-3 upregulation in reactive astrocytes may play a role in preventing hyperexcitability induced by continued seizure activity.
Collapse
Affiliation(s)
- Kyoung Hoon Jeong
- Department of Neurology, Yonsei University College of Medicine, Seoul, Republic of Korea.,Department of Pharmacology, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Kyung-Ok Cho
- Department of Pharmacology, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea.,Department of Biomedicine & Health Sciences, The Catholic University of Korea, Seoul, Republic of Korea.,Catholic Neuroscience Institute, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Mun-Yong Lee
- Department of Biomedicine & Health Sciences, The Catholic University of Korea, Seoul, Republic of Korea.,Catholic Neuroscience Institute, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea.,Department of Anatomy, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Seong Yun Kim
- Department of Pharmacology, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea.,Department of Biomedicine & Health Sciences, The Catholic University of Korea, Seoul, Republic of Korea.,Catholic Neuroscience Institute, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Won-Joo Kim
- Department of Neurology, Yonsei University College of Medicine, Seoul, Republic of Korea
| |
Collapse
|
27
|
Khandagale A, Åberg M, Wikström G, Bergström Lind S, Shevchenko G, Björklund E, Siegbahn A, Christersson C. Role of Extracellular Vesicles in Pulmonary Arterial Hypertension: Modulation of Pulmonary Endothelial Function and Angiogenesis. Arterioscler Thromb Vasc Biol 2020; 40:2293-2309. [PMID: 32757648 DOI: 10.1161/atvbaha.120.314152] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
OBJECTIVE Extracellular vesicles (EVs) have the potential to act as intercellular communicators. The aims were to characterize circulating EVs in patients with pulmonary arterial hypertension (PAH) and to explore whether these EVs contribute to endothelial activation and angiogenesis. Approach and Results: Patients with PAH (n=70) and healthy controls (HC; n=20) were included in this cross-sectional study. EVs were characterized and human pulmonary endothelial cells (hPAECs) were incubated with purified EVs. Endothelial cell activity and proangiogenic markers were analyzed. Tube formation analysis was performed for hPAECs, and the involvement of PSGL-1 (P-selectin glycoprotein ligand 1) was evaluated. The numbers of CD62P+, CD144+, and CD235a EVs were higher in blood from PAH compared with HC. Thirteen proteins were differently expressed in PAH and HC EVs, where complement fragment C1q was the most significantly elevated protein (P=0.0009) in PAH EVs. Upon EVs-internalization in hPAECs, more PAH compared with HC EVs evaded lysosomes (P<0.01). As oppose to HC, PAH EVs stimulated hPAEC activation and induced transcription and translation of VEGF-A (vascular endothelial growth factor A; P<0.05) and FGF (fibroblast growth factor; P<0.005) which were released in the cell supernatant. These proangiogenic proteins were higher in patient with PAH plasma compered with HC. PAH EVs induced a complex network of angiotubes in vitro, which was abolished by inhibitory PSGL-1antibody. Anti-PSGL-1 also inhibited EV-induced endothelial cell activation and PAH EV dependent increase of VEGF-A. CONCLUSIONS Patients with PAH have higher levels of EVs harboring increased amounts of angiogenic proteins, which induce activation of hPAECs and in vitro angiogenesis. These effects were partly because of platelet-derived EVs evasion of lysosomes upon internalization within hPAEC and through possible involvement of P-selectin-PSGL-1 pathway.
Collapse
Affiliation(s)
- Avinash Khandagale
- From the Department of Medical Sciences, Cardiology and Clinical Chemistry (A.K.), Uppsala University, Sweden
| | - Mikael Åberg
- Department of Medical Sciences, Clinical Chemistry (M.Å., A.S.), Uppsala University, Sweden
| | - Gerhard Wikström
- Department of Medical Sciences, Cardiology and Internal Medicine (G.W.), Uppsala University, Sweden
| | - Sara Bergström Lind
- Department of Chemistry - BMC, Analytical Chemistry (S.B.L., G.S.), Uppsala University, Sweden
| | - Ganna Shevchenko
- Department of Chemistry - BMC, Analytical Chemistry (S.B.L., G.S.), Uppsala University, Sweden
| | - Erik Björklund
- Department of Medical Sciences, Cardiology (E.B., C.C.), Uppsala University, Sweden
| | - Agneta Siegbahn
- Department of Medical Sciences, Clinical Chemistry (M.Å., A.S.), Uppsala University, Sweden
| | | |
Collapse
|
28
|
Li Z, Wang M, Gu J, Zhao L, Guo Y, Zhang Z, Liu X. Missense Variants in Hypoxia-Induced VEGFA/VEGFR2 Signaling Predict the Outcome of Large Artery Atherosclerotic Stroke. Cell Mol Neurobiol 2020; 41:1217-1225. [PMID: 32506171 DOI: 10.1007/s10571-020-00890-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2019] [Accepted: 05/28/2020] [Indexed: 11/30/2022]
Abstract
Collateral density variations are a major determinant of stroke outcome. Here, we explored the association of missense variants in hypoxia-induced VEGFA/VEGFR2 signaling and stroke outcome. We recruited 683 large artery atherosclerotic (LAA) stroke patients as the training set from Nanjing Stroke Registry Program between August 2013 and January 2016. To validate the findings from the training set, we recruited an additional 333 LAA stroke patients between February 2016 and January 2017 as the validation set. Genotyping of target SNPs (rs11549465 [HIF-1α], rs11549467 [HIF-1α], rs1870377 [VEGFR2], and rs2305948 [VEGFR2]) was conducted using a SNPscan method. Unfavorable outcome was defined as a modified Rankin Scale (mRS) score > 2 at three months after index event. In the training set, the AA genotype of rs1870377 led to a decreased risk of unfavorable outcomes in the recessive model (AA vs. TA + TT, OR 0.60, 95% CI 0.38-0.95, P = 0.031). This was confirmed in the validation set (OR 0.43, 95% CI 0.21-0.86, P = 0.017) and the combined set (OR 0.54, 95% CI 0.36-0.79, P = 0.002). We also found that A allele was a protective factor for stroke outcome in both validation set and combined set (OR 0.70, 95% CI 0.49-0.99, P = 0.044 and OR 0.77, 95% CI 0.63-0.94, P = 0.012, respectively). In silico analysis indicated that the rs1870377 variant led to structural alterations in VEGFR2 that may influence its activity. Our findings demonstrate that the rs1870377 in the hypoxia-induced VEGFA/VEGFR2 axis predicts the 3-month outcome of patients with LAA stroke.
Collapse
Affiliation(s)
- Zibao Li
- Department of Neurology, Jinling Hospital, Nanjing Medical University, 305 East Zhongshan Road, Nanjing, 210002, Jiangsu, China.,Department of Neurology, Yijishan Hospital of Wannan Medical College, Wuhu, 241001, China
| | - Mengmeng Wang
- Department of Neurology, The First People's Hospital of Changzhou, The Third Affiliated Hospital of Soochow University, Changzhou, 213000, China
| | - Jinyu Gu
- Department of Neurology, Jinling Hospital, Nanjing Medical University, 305 East Zhongshan Road, Nanjing, 210002, Jiangsu, China
| | - Li Zhao
- Department of Neurology, Yijishan Hospital of Wannan Medical College, Wuhu, 241001, China
| | - Yongtao Guo
- Department of Neurology, Huai'an First People's Hospital, Nanjing Medical University, Huai'an, 223300, China
| | - Zhizhong Zhang
- Department of Neurology, Jinling Hospital, Nanjing Medical University, 305 East Zhongshan Road, Nanjing, 210002, Jiangsu, China. .,Department of Neurology, Jinling Hospital, Medical School of Nanjing University, Nanjing, 210002, China.
| | - Xinfeng Liu
- Department of Neurology, Jinling Hospital, Nanjing Medical University, 305 East Zhongshan Road, Nanjing, 210002, Jiangsu, China. .,Department of Neurology, Jinling Hospital, Medical School of Nanjing University, Nanjing, 210002, China.
| |
Collapse
|
29
|
Quan JH, Ismail HAHA, Cha GH, Jo YJ, Gao FF, Choi IW, Chu JQ, Yuk JM, Lee YH. VEGF Production Is Regulated by the AKT/ERK1/2 Signaling Pathway and Controls the Proliferation of Toxoplasma gondii in ARPE-19 Cells. Front Cell Infect Microbiol 2020; 10:184. [PMID: 32432052 PMCID: PMC7216739 DOI: 10.3389/fcimb.2020.00184] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2019] [Accepted: 04/06/2020] [Indexed: 11/13/2022] Open
Abstract
The retina is the primary site of Toxoplasma gondii infection in the eye, and choroidal neovascularization in ocular toxoplasmosis is one of the most important causes of visual impairment. Vascular endothelial growth factor (VEGF) is one of the key regulators of blood vessel development, however, little is known about the mechanisms of T. gondii-induced VEGF production in ocular toxoplasmosis. Here, we investigate the effect of T. gondii on VEGF production regulation in human retinal pigment epithelium ARPE-19 cells and attempted to unveil the underlying mechanism of this event by focusing on the interaction between parasite and the selected host intracellular signaling pathways. T. gondii infection increased the expression of VEGF mRNA and protein in ARPE-19 cells in parasite burden- and infection time-dependent manner. The proportional increase of VEGF upstream regulators, HIF-1α and HO-1, was also observed. T. gondii induced the activation of host p-AKT, p-ERK1/2, and p-p38 MAPK in ARPE-19 cells in a parasite-burden dependent manner. However, VEGF expression decreased after the pre-treatment with PI3K inhibitors (LY294002 and GDC-0941), ERK1/2 inhibitor (PD098059), and p38 MAPK inhibitor (SB203580), but not JNK inhibitor (SP600125), in a dose-dependent manner. The anti-VEGF agent bevacizumab or VEGF siRNA transfection prominently inhibited the activation of p-AKT and p-ERK1/2, but not p-p38 MAPK and JNK1/2 in T. gondii-infected ARPE-19 cells. Bevacizumab treatment or VEGF siRNA transfection significantly inhibited the proliferation of T. gondii tachyzoites in the host cell, dose-dependently, but not invasion of parasites. VEGF-receptor 2 (VEGF-R2) antagonist, SU5416, attenuated VEGF production and tachyzoite proliferation in T. gondii-infected ARPE-19 cells in a dose-dependent manner. Collectively, T. gondii prominently induces VEGF production in ARPE-19 cells, and VEGF and AKT/ERK1/2 signaling pathways mutually regulate each other in T. gondii-infected ARPE-19 cells, but not p38 MAPK and JNK1/2 signaling pathways. VEGF and VEGF-R2 control the parasite proliferation in T. gondii-infected ARPE-19 cells. From this study, we revealed the putative mechanisms for VEGF induction as well as the existence of positive feedback between VEGF and PI3K/MAPK signaling pathways in T. gondii-infected retinal pigment epithelium.
Collapse
Affiliation(s)
- Juan-Hua Quan
- Department of Gastroenterology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | | | - Guang-Ho Cha
- Department of Infection Biology and Department of Medical Science, Chungnam National University School of Medicine, Daejeon, South Korea
| | - Young-Joon Jo
- Department of Ophthalmology, School of Medicine, Chungnam National University, Daejeon, South Korea
| | - Fei Fei Gao
- Department of Infection Biology and Department of Medical Science, Chungnam National University School of Medicine, Daejeon, South Korea
| | - In-Wook Choi
- Department of Infection Biology and Department of Medical Science, Chungnam National University School of Medicine, Daejeon, South Korea
| | - Jia-Qi Chu
- Stem Cell Research and Cellular Therapy Center, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Jae-Min Yuk
- Department of Infection Biology and Department of Medical Science, Chungnam National University School of Medicine, Daejeon, South Korea
| | - Young-Ha Lee
- Department of Infection Biology and Department of Medical Science, Chungnam National University School of Medicine, Daejeon, South Korea
| |
Collapse
|
30
|
Vitor LLR, Bergamo MTOP, Lourenço-Neto N, Sakai VT, Oliveira RC, Cruvinel T, Rios D, Garlet GP, Santos CF, Machado MAAM, Oliveira TM. Photobiomodulation effect on angiogenic proteins produced and released by dental pulp cells. Clin Oral Investig 2020; 24:4343-4354. [PMID: 32333178 DOI: 10.1007/s00784-020-03298-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Accepted: 04/17/2020] [Indexed: 11/29/2022]
Abstract
OBJECTIVE To verify the photobiomodulation effect on angiogenic proteins produced and released by dental human pulpal fibroblasts (HPFs). MATERIAL AND METHODS HPFs were irradiated with 660-nm low-level laser at fluences of 2.5 J/cm2 and 3.7 J/cm2. The control group was not irradiated. MTT, crystal violet, and ELISA assays respectively verified viability, proliferation, and angiogenic protein (supernatant/lysate) at 6 h, 12 h, and 24 h after photobiomodulation. Capillary-like structure formation assay verified functional role. Two-way ANOVA/Tukey's test and ANOVA/Bonferroni's multiple comparisons test respectively verified cell viability/proliferation and intragroup and intergroup comparisons of protein synthesis (p < 0.05). RESULTS Irradiated and non-irradiated HPFs showed statistically similar cell viability and proliferation pattern. Intragroup comparisons showed similar patterns of protein synthesis for all groups: VEGF-A, VEGF-C, and vascular endothelial growth factor receptor 1 (VEGFR1) increased significantly in the supernatant, while FGF-2 and VEGF-A increased significantly in the lysate. The lower fluence significantly increased BMP-9 (6 h) in the supernatant and VEGFR1 (6 h and 12 h) and VEGF-D (24 h) in the lysate, while the higher fluence significantly increased BMP-9 (6 h) in the supernatant and VEGFR1 (12 h) in the lysate. Regardless of the time, both fluences statistically downregulated placental growth factor (PLGF) and PDGF secretion. Both fluences statistically decreased VEGF-A secretion (24 h) and PLGF production (6 h). CONCLUSION Photobiomodulation produced stimulatory effects on angiogenic protein secretion by pulp fibroblasts. In terms of photobiomodulation, over time, both fluences significantly increased the secretion of VEGF-A, VEGF-C, and VEGFR1 and significantly upregulated BMP-9 (6 h) in the supernatant; for capillary-like structure formation, the fluence of 2.5 J/cm2 was better than the fluence of 3.7 J/cm2. CLINICAL RELEVANCE This study results addressed effective photobiomodulation parameters tailored for pulp angiogenesis.
Collapse
Affiliation(s)
- Luciana Lourenço Ribeiro Vitor
- Department of Pediatric Dentistry, University of Sacred Heart, Rua Irmã Arminda, 10-50, Bauru, São Paulo, 17011-160, Brazil.
| | | | - Natalino Lourenço-Neto
- Department of Pediatric Dentistry, Orthodontics, and Public Health, Bauru School of Dentistry, University of São Paulo, Bauru, São Paulo, Brazil
| | - Vivien Thiemy Sakai
- Department of Clinics and Surgery, School of Dentistry, Federal University of Alfenas, Alfenas, Minas Gerais, Brazil
| | - Rodrigo Cardoso Oliveira
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Bauru, São Paulo, Brazil
| | - Thiago Cruvinel
- Department of Pediatric Dentistry, Orthodontics, and Public Health, Bauru School of Dentistry, University of São Paulo, Bauru, São Paulo, Brazil
| | - Daniela Rios
- Department of Pediatric Dentistry, Orthodontics, and Public Health, Bauru School of Dentistry, University of São Paulo, Bauru, São Paulo, Brazil
| | - Gustavo Pompermaier Garlet
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Bauru, São Paulo, Brazil
| | - Carlos Ferreira Santos
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Bauru, São Paulo, Brazil
| | | | - Thais Marchini Oliveira
- Department of Pediatric Dentistry, Orthodontics, and Public Health, Bauru School of Dentistry, University of São Paulo, Bauru, São Paulo, Brazil
| |
Collapse
|
31
|
Mei B, Chen J, Yang N, Peng Y. The regulatory mechanism and biological significance of the Snail-miR590-VEGFR-NRP1 axis in the angiogenesis, growth and metastasis of gastric cancer. Cell Death Dis 2020; 11:241. [PMID: 32303680 PMCID: PMC7165172 DOI: 10.1038/s41419-020-2428-x] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Revised: 03/20/2020] [Accepted: 03/23/2020] [Indexed: 12/26/2022]
Abstract
Vascular endothelial growth factor receptor (VEGFR) and neuropilins (NRPs), a co-receptor of VEGF, play a key role in the formation and development of blood vessels and in tumour growth and metastasis. However, whether VEGFR1/2 and NRP1 are regulated by the same upstream mechanism is unclear, especially in gastric cancer. We used prediction tools to detect miRNAs that may simultaneously regulate VEGFR1/2 and NRP1, and we finally determined that miR-590 can simultaneously regulate VEGFR1/2 and NRP1 in gastric cancer. We discovered that miR-590 was downregulated in gastric cancer tissues and cell lines, and this was related to the dysregulation of the transcription factor SNAIL. In addition, the overexpression of miR-590 inhibits the migration, invasion, proliferation and D-MVA levels of gastric cancer cells in vivo and in vitro by targeting VEGFR1/2 and NRP1. We also demonstrated that miR-590 may be a useful marker for the prognosis of gastric cancer with Kaplan–Meier survival analysis. Since the epithelial-to-mesenchymal transition (EMT) is an important mechanism of tumour invasion and metastasis and VEGFR1/2 and NRP1 can promote the occurrence of EMT, we speculated that miR-590 can regulate the occurrence of EMT. Immunoblot and immunofluorescence analyses confirmed that the overexpression of miR-590 can inhibit the EMT in gastric cancer cells. Since SNAIL is also a mesenchymal marker, our results revealed a new, positive feedback loop. As a transcription factor, SNAIL inhibits the expression of miR-590, thereby upregulating the expression levels of NRP1 and VEGFR1/2; this leads to the development of EMT in gastric cancer and the upregulation of SNAIL.
Collapse
Affiliation(s)
- Bin Mei
- Hepatic Surgery Centre, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 430030, Wuhan, China
| | - Jiajie Chen
- Department of Geriatrics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 430030, Wuhan, China
| | - Ni Yang
- Department of Geriatrics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 430030, Wuhan, China
| | - Yang Peng
- Department of Geriatrics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 430030, Wuhan, China.
| |
Collapse
|
32
|
Angiogenic protein synthesis after photobiomodulation therapy on SHED: a preliminary study. Lasers Med Sci 2020; 35:1909-1918. [PMID: 32056077 DOI: 10.1007/s10103-020-02975-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Accepted: 01/31/2020] [Indexed: 10/25/2022]
Abstract
This study evaluated the viability, proliferation, and protein expression after photobiomodulation (PBM) of stem cell from human exfoliated deciduous teeth (SHED). The groups were the following: G1 (2.5 J/cm2), G2 (3.7 J/cm2), and control (not irradiated). According to the groups, cells were irradiated with InGaAlP diode laser at 660 nm wavelength, continuous mode, and single time application. After 6 h, 12 h, and 24 h from irradiation, the cell viability and proliferation, and the protein expression were analyzed by MTT, crystal violet, and ELISA multiplex assay, respectively. Twenty-four hours after PBM, SHED showed better proliferation. Over time in the supernatant, all groups had an increase at the levels of VEGF-C, VEGF-A, and PLGF. In the lysate, the control and G2 exhibited a decrease of the VEGF-A, PECAM-1, and PLGF expression, while control and G3 decreased VEGF-C, VEGF-A, and PDGF expression. The dosimetries of 2.5 J/cm2 and 3.7 J/cm2 maintained viability, improved proliferation, and synthesis of the angiogenic proteins in the supernatant in the studied periods on SHED.
Collapse
|
33
|
Lam B, Roudier E. Considering the Role of Murine Double Minute 2 in the Cardiovascular System? Front Cell Dev Biol 2020; 7:320. [PMID: 31921839 PMCID: PMC6916148 DOI: 10.3389/fcell.2019.00320] [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] [Received: 08/08/2019] [Accepted: 11/21/2019] [Indexed: 01/26/2023] Open
Abstract
The E3 ubiquitin ligase Murine double minute 2 (MDM2) is the main negative regulator of the tumor protein p53 (TP53). Extensive studies over more than two decades have confirmed MDM2 oncogenic role through mechanisms both TP53-dependent and TP53-independent oncogenic function. These studies have contributed to designate MDM2 as a therapeutic target of choice for cancer treatment and the number of patents for MDM2 antagonists has increased immensely over the last years. However, the question of the physiological functions of MDM2 has not been fully resolved yet, particularly when expressed and regulated physiologically in healthy tissue. Cardiovascular complications are almost an inescapable side-effect of anti-cancer therapies. While several MDM2 antagonists are entering phase I, II and even III of clinical trials, this review proposes to bring awareness on the physiological role of MDM2 in the cardiovascular system.
Collapse
Affiliation(s)
- Brian Lam
- Angiogenesis Research Group, School of Kinesiology and Health Sciences, Muscle Health Research Center, Faculty of Health, York University, Toronto, ON, Canada
| | - Emilie Roudier
- Angiogenesis Research Group, School of Kinesiology and Health Sciences, Muscle Health Research Center, Faculty of Health, York University, Toronto, ON, Canada
| |
Collapse
|
34
|
Development of hydrogel-like biomaterials via nanoparticle assembly and solid-hydrogel transformation. J Control Release 2019; 318:185-196. [PMID: 31857102 DOI: 10.1016/j.jconrel.2019.12.026] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Revised: 12/07/2019] [Accepted: 12/15/2019] [Indexed: 11/22/2022]
Abstract
Hydrogels for biomedical applications such as controlled drug release are usually synthesized with the chemical or physical crosslinking of monomers or macromers. In this work, we used gelatin to prepare hydrogel nanoparticles and studied whether gelatin nanoparticles (GNPs) could assemble to form a solid biomaterial and whether this solid biomaterial was capable of transforming into a hydrogel upon introduction to a hydrated environment. The data show that GNPs with or without aptamer functionalization could form a nanoparticle-assembled porous solid biomaterial after freezing and lyophilization treatment. This formation did not need any additional crosslinking reactions. More importantly, this solid biomaterial could undergo solid-to-hydrogel transition after contacting a solution and this transformation was tunable to match different shapes and geometries of defined molds. The formed hydrogel could also sequester and release growth factors for the promotion of skin wound healing. Thus, GNP-assembled solid biomaterials hold great potential as an off-the-shelf therapy for biomedical application such as drug delivery and regenerative medicine.
Collapse
|
35
|
Vitor LLR, Prado MTO, Lourenço Neto N, Oliveira RC, Sakai VT, Santos CF, Dionísio TJ, Rios D, Cruvinel T, Machado MAAM, Oliveira TM. Does photobiomodulation change the synthesis and secretion of angiogenic proteins by different pulp cell lineages? JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2019; 203:111738. [PMID: 31954290 DOI: 10.1016/j.jphotobiol.2019.111738] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2019] [Revised: 09/02/2019] [Accepted: 12/09/2019] [Indexed: 12/28/2022]
Abstract
This study aimed to compare the synthesis and secretion of VEGF-A, VEGF-C, VEGF-D, VEGFR1, VEGFR2, and FGF-2 between pulp fibroblasts from human primary teeth (HPF) and stem cell from human deciduous teeth (SHED) before and after photobiomodulation. HPF were obtained from explant technique and characterized by immunohistochemistry, while SHED were obtained from digestion technique and characterized by flow cytometry. HPF (control group) and SHED were plated, let to adhere, and put on serum starvation to synchronize the cell cycles prior to photobiomodulation. Then, both cell lineages were irradiated with 660-nm laser according to the following groups: 2.5 and 3.7 J/cm2. MTT and crystal violet assays respectively verified viability and proliferation. ELISA Multiplex Assay assessed the following proteins: VEGF-A, VEGF-C, VEGF-D, VEGFR1, VEGFR2, FGF-2, at 6, 12, and 24 h after photobiomodulation, in supernatant and lysate. Two-way ANOVA/Tukey test evaluated cell viability and proliferation, while angiogenic production and secretion values were analyzed by one-way ANOVA (P < .05). Statistically similar HPF and SHED viability and proliferation patterns occurred before and after photobiomodulation (P > .05). HPF exhibited statistically greater values of all angiogenic proteins than did SHED, at all study periods, except for FGF-2 (supernatant; 12 h); VEGFR1 (lysate; non-irradiated; 12 h); and VEGFR1 (lysate; non-irradiated; 24 h). Photobiomodulation changed the synthesis and secretion of angiogenic proteins by HPF. HPF produced and secreted greater values of all tested angiogenic proteins than did SHED before and after irradiation with both energy densities of 2.5 and 3.7 J/cm2.
Collapse
Affiliation(s)
| | - Mariel Tavares Oliveira Prado
- Department of Pediatric Dentistry, Orthodontics, and Public Health, Bauru School of Dentistry, University of São Paulo, Bauru, São Paulo, Brazil
| | - Natalino Lourenço Neto
- Department of Pediatric Dentistry, Orthodontics, and Public Health, Bauru School of Dentistry, University of São Paulo, Bauru, São Paulo, Brazil
| | - Rodrigo Cardoso Oliveira
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Bauru, São Paulo, Brazil
| | - Vivien Thiemy Sakai
- Department of Clinics and Surgery, School of Dentistry, Federal University of Alfenas, Alfenas, Minas Gerais, Brazil
| | - Carlos Ferreira Santos
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Bauru, São Paulo, Brazil
| | - Thiago José Dionísio
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Bauru, São Paulo, Brazil
| | - Daniela Rios
- Department of Pediatric Dentistry, Orthodontics, and Public Health, Bauru School of Dentistry, University of São Paulo, Bauru, São Paulo, Brazil
| | - Thiago Cruvinel
- Department of Pediatric Dentistry, Orthodontics, and Public Health, Bauru School of Dentistry, University of São Paulo, Bauru, São Paulo, Brazil
| | | | - Thais Marchini Oliveira
- Department of Pediatric Dentistry, Orthodontics, and Public Health, Bauru School of Dentistry, University of São Paulo, Bauru, São Paulo, Brazil.
| |
Collapse
|
36
|
Aguilar-Cazares D, Chavez-Dominguez R, Carlos-Reyes A, Lopez-Camarillo C, Hernadez de la Cruz ON, Lopez-Gonzalez JS. Contribution of Angiogenesis to Inflammation and Cancer. Front Oncol 2019; 9:1399. [PMID: 31921656 PMCID: PMC6920210 DOI: 10.3389/fonc.2019.01399] [Citation(s) in RCA: 185] [Impact Index Per Article: 37.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2019] [Accepted: 11/26/2019] [Indexed: 12/12/2022] Open
Abstract
During carcinogenesis, advanced tumors are surrounded by both stromal and immune cells, which support tumor development. In addition, inflammation and angiogenesis are processes that play important roles in the development of cancer, from the initiation of carcinogenesis, tumor in situ and advanced stages of cancer. During acute inflammation, vascular hyperpermeability allows inflammatory mediators and immune response cells, including leukocytes and monocytes/macrophages, to infiltrate the site of damage. As a factor that regulates vascular permeability, vascular endothelial growth factor (VEGF) also plays a vital role as a multifunctional molecule and growth factor. Furthermore, stromal and immune cells secrete soluble factors that activate endothelial cells and favor their transmigration to eliminate the aggressive agent. In this review, we present a comprehensive view of both the relationship between chronic inflammation and angiogenesis during carcinogenesis and the participation of endothelial cells in the inflammatory process. In addition, the regulatory mechanisms that contribute to the endothelium returning to its basal permeability state after acute inflammation are discussed. Moreover, the manner in which immune cells participate in pathological angiogenesis release pro-angiogenic factors that contribute to early tumor vascularization, even before the angiogenic switch occurs, is also examined. Also, we discuss the role of hypoxia as a mechanism that drives the acquisition of tumor hallmarks that make certain cancers more aggressive. Finally, some combinations of therapies that inhibit the angiogenesis process and that may be a successful strategy for cancer patients are indicated.
Collapse
Affiliation(s)
- Dolores Aguilar-Cazares
- Departamento de Enfermedades Cronico-Degenerativas, Instituto Nacional de Enfermedades Respiratorias "Ismael Cosio Villegas", Mexico City, Mexico
| | - Rodolfo Chavez-Dominguez
- Departamento de Enfermedades Cronico-Degenerativas, Instituto Nacional de Enfermedades Respiratorias "Ismael Cosio Villegas", Mexico City, Mexico.,Posgrado en Ciencias Biologicas, Universidad Nacional Autonoma de Mexico, Mexico City, Mexico
| | - Angeles Carlos-Reyes
- Departamento de Enfermedades Cronico-Degenerativas, Instituto Nacional de Enfermedades Respiratorias "Ismael Cosio Villegas", Mexico City, Mexico
| | - César Lopez-Camarillo
- Posgrado en Ciencias Genomicas, Universidad Autonoma de la Ciudad de México, Mexico City, Mexico
| | | | - Jose S Lopez-Gonzalez
- Departamento de Enfermedades Cronico-Degenerativas, Instituto Nacional de Enfermedades Respiratorias "Ismael Cosio Villegas", Mexico City, Mexico
| |
Collapse
|
37
|
Cutini PH, Massheimer VL. In vitro effects of progesterone and the synthetic progestin medroxyprogesterone acetate on vascular remodeling. Mol Cell Endocrinol 2019; 498:110543. [PMID: 31421164 DOI: 10.1016/j.mce.2019.110543] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/28/2019] [Revised: 08/12/2019] [Accepted: 08/12/2019] [Indexed: 01/06/2023]
Abstract
In this work we tested the hypothesis whether progesterone (Pg) or the synthetic progestin medroxyprogesterone acetate (MPA) could be involved in the regulation of events involved in vascular remodeling. Results revealed an enhancement in the capillary-like tubes formation induced by both progestogens. Unlike MPA, Pg acts through VEGF, nitric oxide, PI3K and ERK1/2 signaling pathways. However, the MPA effect depends on platelet activation. Under stress conditions, the proangiogenic action of Pg and MPA was sustained. The progestogens exhibit the ability to prevent vascular smooth muscle cells (VSMC) osteogenic transdifferentiation. Besides this antiosteogenic action, on bone cells the progestogens induced osteoblast maturation and mineralization. The mechanism of action of both steroids on vascular and bone cells involves the participation of progesterone receptor. The data presented in this work provide evidence that the progestogens reduce osteogenic-like transdifferentiation of VSMC and promote angiogenesis with a slight different mechanism of action elicited by each steroid.
Collapse
Affiliation(s)
- Pablo H Cutini
- Instituto de Ciencias Biológicas y Biomédicas del Sur (INBIOSUR), Universidad Nacional del Sur (UNS), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Departamento de Biología, Bioquímica y Farmacia, UNS, San Juan 670, B8000ICN, Bahía Blanca, Argentina.
| | - Virginia L Massheimer
- Instituto de Ciencias Biológicas y Biomédicas del Sur (INBIOSUR), Universidad Nacional del Sur (UNS), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Departamento de Biología, Bioquímica y Farmacia, UNS, San Juan 670, B8000ICN, Bahía Blanca, Argentina.
| |
Collapse
|
38
|
Comparison of the Therapeutic Efficacies of Topical Rivoceranib and Topical Bevacizumab in a Murine Model of Corneal Neovascularization. ACTA ACUST UNITED AC 2019; 55:medicina55110729. [PMID: 31703332 PMCID: PMC6915418 DOI: 10.3390/medicina55110729] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Revised: 11/01/2019] [Accepted: 11/06/2019] [Indexed: 12/14/2022]
Abstract
Background and Objectives: Corneal neovasculariziation (CNV) is a serious vision-threatening complication; however, all therapeutics have their clinical limitations. The aim of this study is to investigate the efficacy of topical rivoceranib compared with topical bevacizumab in a murine model of corneal neovascularization (CNV). Materials and Methods: Murine CNV was induced by means of total de-epithelization and alkali burn. Mice were divided into five groups according to topical treatment: untreated control, phosphate-buffered saline (PBS), 0.1% and 0.5% rivoceranib, and 0.5% bevacizumab. CNV area and index were measured 7 and 14 days after treatment. After corneal tissues were excised at day 14, the blood and lymphatic vessels were quantified by cluster of differentiation 31 (CD31) and lymphatic vessel endothelial hyaluronan receptor 1 (LYVE1) immunofluorescence, respectively. Results: After 14 days, treatment groups with 0.1% and 0.5% rivoceranib and 0.5% bevacizumab showed a decrease in CNV area and index compared with the untreated and PBS groups (all p < 0.01). Blood and lymphatic vascularization significantly decreased in the 0.5% rivoceranib and 0.5% bevacizumab groups, as measured by CD31 and LYVE1 immunofluorescence. There was no significant difference of vascularization between the 0.5% rivoceranib and bevacizumab groups. Conclusions: Topical application of rivoceranib could effectively decrease CNV equivalent to topical bevacizumab in a murine model.
Collapse
|
39
|
Wang Y, Lu YH, Tang C, Xue M, Li XY, Chang YP, Cheng Y, Li T, Yu XC, Sun B, Li CJ, Chen LM. Calcium Dobesilate Restores Autophagy by Inhibiting the VEGF/PI3K/AKT/mTOR Signaling Pathway. Front Pharmacol 2019; 10:886. [PMID: 31447680 PMCID: PMC6696883 DOI: 10.3389/fphar.2019.00886] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2019] [Accepted: 07/15/2019] [Indexed: 01/10/2023] Open
Abstract
Objective: Calcium dobesilate (CaD), an effective drug for the treatment of diabetic microvascular complications, especially diabetic retinopathy, is widely used in the clinic. Interestingly, several studies have indicated that CaD is therapeutic for diabetic kidney disease (DKD). Recently, evidence has indicated that altered vascular endothelial growth factor (VEGF) expression and decreased autophagy are the main pathological mechanisms of proteinuria. Thus, this study was conducted to explore the effect of CaD on restoring autophagy in DKD and the possible signaling pathway between VEGF and autophagy. Methods: Obese mice with spontaneous diabetes (KK-Ay) and high-fat diet- and streptozotocin-induced diabetic mice (HFD/STZ) were used in this study. Biochemical staining, western blotting, and immunohistochemistry were conducted to determine the angioprotective effect of CaD and the underlying mechanism between autophagy and VEGF/VEGFR. Results: Our results showed that CaD was capable of reducing albuminuria and restoring renal histological changes in KK-Ay and HFD/STZ-induced diabetic mice. CaD restored autophagy by decreasing the protein expression of LC3 II, Atg5, and beclin 1 and increasing the expression of P62. Moreover, CaD reduced the activation of the autophagy-related PI3K/AKT/mTOR pathway possibly via decreasing VEGF and downregulating VEGF receptor 2. Conclusion: Overall, CaD, as a novel potential therapeutic drug for DKD, plays a key role in protecting renal function and restoring autophagy by blocking VEGF/VEGFR2 and inhibiting the PI3K/AKT/mTOR signaling pathway.
Collapse
Affiliation(s)
- Yue Wang
- NHC Key Laboratory of Hormones and Development (Tianjin Medical University), Tianjin Key Laboratory of Metabolic Diseases, Tianjin Medical University Chu Hsien-I Memorial Hospital, Tianjin Institute of Endocrinology, Tianjin, China
| | - Yun-Hong Lu
- NHC Key Laboratory of Hormones and Development (Tianjin Medical University), Tianjin Key Laboratory of Metabolic Diseases, Tianjin Medical University Chu Hsien-I Memorial Hospital, Tianjin Institute of Endocrinology, Tianjin, China
| | - Chao Tang
- NHC Key Laboratory of Hormones and Development (Tianjin Medical University), Tianjin Key Laboratory of Metabolic Diseases, Tianjin Medical University Chu Hsien-I Memorial Hospital, Tianjin Institute of Endocrinology, Tianjin, China
| | - Mei Xue
- NHC Key Laboratory of Hormones and Development (Tianjin Medical University), Tianjin Key Laboratory of Metabolic Diseases, Tianjin Medical University Chu Hsien-I Memorial Hospital, Tianjin Institute of Endocrinology, Tianjin, China
| | - Xiao-Yu Li
- NHC Key Laboratory of Hormones and Development (Tianjin Medical University), Tianjin Key Laboratory of Metabolic Diseases, Tianjin Medical University Chu Hsien-I Memorial Hospital, Tianjin Institute of Endocrinology, Tianjin, China
| | - Yun-Peng Chang
- NHC Key Laboratory of Hormones and Development (Tianjin Medical University), Tianjin Key Laboratory of Metabolic Diseases, Tianjin Medical University Chu Hsien-I Memorial Hospital, Tianjin Institute of Endocrinology, Tianjin, China
| | - Ying Cheng
- NHC Key Laboratory of Hormones and Development (Tianjin Medical University), Tianjin Key Laboratory of Metabolic Diseases, Tianjin Medical University Chu Hsien-I Memorial Hospital, Tianjin Institute of Endocrinology, Tianjin, China
| | - Ting Li
- NHC Key Laboratory of Hormones and Development (Tianjin Medical University), Tianjin Key Laboratory of Metabolic Diseases, Tianjin Medical University Chu Hsien-I Memorial Hospital, Tianjin Institute of Endocrinology, Tianjin, China
| | - Xiao-Chen Yu
- NHC Key Laboratory of Hormones and Development (Tianjin Medical University), Tianjin Key Laboratory of Metabolic Diseases, Tianjin Medical University Chu Hsien-I Memorial Hospital, Tianjin Institute of Endocrinology, Tianjin, China
| | - Bei Sun
- NHC Key Laboratory of Hormones and Development (Tianjin Medical University), Tianjin Key Laboratory of Metabolic Diseases, Tianjin Medical University Chu Hsien-I Memorial Hospital, Tianjin Institute of Endocrinology, Tianjin, China
| | - Chun-Jun Li
- NHC Key Laboratory of Hormones and Development (Tianjin Medical University), Tianjin Key Laboratory of Metabolic Diseases, Tianjin Medical University Chu Hsien-I Memorial Hospital, Tianjin Institute of Endocrinology, Tianjin, China
| | - Li-Ming Chen
- NHC Key Laboratory of Hormones and Development (Tianjin Medical University), Tianjin Key Laboratory of Metabolic Diseases, Tianjin Medical University Chu Hsien-I Memorial Hospital, Tianjin Institute of Endocrinology, Tianjin, China
| |
Collapse
|
40
|
IL-35, TNF-α, BAFF, and VEGF serum levels in patients with different rheumatic diseases. Reumatologia 2019; 57:145-150. [PMID: 31462829 PMCID: PMC6710841 DOI: 10.5114/reum.2019.86424] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2019] [Accepted: 06/21/2019] [Indexed: 01/07/2023] Open
Abstract
Objectives Inflammatory processes in rheumatic diseases spread via various types of immune system cells and tissues with the aid of inflammatory cytokines and growth factors and the participation of vascular endothelium. Research is still conducted to determine the role of individual factors in the pathophysiology of rheumatic diseases. The task is complicated because the multiplane network of cytokines is characterized by complex correlations manifesting as positive and negative feedback, which impedes the definitive interpretation of the role of specific cytokines. Therefore, it seems justified to perform a comparative analysis of the expression of at least several molecules in one study, which may help reveal their role in the pathogenesis of rheumatic diseases and have prognostic value. Material and methods The aim of the study involves the assessment and comparative analysis of the concentrations of interleukin 35 (IL-35), tumour necrosis factor α (TNF-α), B-cell-activating factor (BAFF), and vascular endothelial growth factor (VEGF) in peripheral blood serum in patients with rheumatoid arthritis (RA) (n = 43), systemic lupus erythematosus (SLE) (n = 28), antiphospholipid syndrome (APS) (n = 24), and mixed connective tissue disease (MCTD) (n = 9). The main intention is to search for biomarkers for specific rheumatic diseases. Cytokine and growth factor levels were determined using specific ELISA kits. Results Statistically significant differences in VEGF and IL-35 concentrations occurred between patients with APS vs. RA and SLE vs. RA. There was a significant high positive correlation between the concentration of BAFF and TNF-α (r = 0.77, p < 0.0000) in patients with APS, as well as in patients with SLE (r = 0.55, p = 0.00). Conclusions BAFF and TNF-α may be promising biomarkers in patients with APS and VEGF in patients with RA. Additionally, IL-35 may be a useful marker for the diagnosis of APS. Positive correlation of BAFF and TNF-α concentrations in APS and SLE potentially indicates much more similar etiopathogenesis of these diseases than it could be previously predicted.
Collapse
|
41
|
Structural studies of the binding of an antagonistic cyclic peptide to the VEGFR1 domain 2. Eur J Med Chem 2019; 169:65-75. [DOI: 10.1016/j.ejmech.2019.02.069] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Revised: 02/19/2019] [Accepted: 02/25/2019] [Indexed: 12/17/2022]
|
42
|
The Effect of Exercise on the Prevention of Osteoporosis and Bone Angiogenesis. BIOMED RESEARCH INTERNATIONAL 2019; 2019:8171897. [PMID: 31139653 PMCID: PMC6500645 DOI: 10.1155/2019/8171897] [Citation(s) in RCA: 58] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/14/2018] [Revised: 02/27/2019] [Accepted: 04/08/2019] [Indexed: 12/20/2022]
Abstract
Physical activity or appropriate exercise prevents the development of osteoporosis. However, the exact mechanism remains unclear although it is well accepted that exercise or mechanical loading regulates the hormones, cytokines, signaling pathways, and noncoding RNAs in bone. Accumulating evidence has shown that bone is a highly vascularized tissue, and dysregulation of vasculature is associated with many bone diseases such as osteoporosis or osteoarthritis. In addition, exercise or mechanical loading regulates bone vascularization in bone microenvironment via the modulation of angiogenic mediators, which play a crucial role in maintaining skeletal health. This review discusses the effects of exercise and its underlying mechanisms for osteoporosis prevention, as well as an angiogenic and osteogenic coupling in response to exercise.
Collapse
|
43
|
Kou ZW, Mo JL, Wu KW, Qiu MH, Huang YL, Tao F, Lei Y, Lv LL, Sun FY. Vascular endothelial growth factor increases the function of calcium-impermeable AMPA receptor GluA2 subunit in astrocytes via activation of protein kinase C signaling pathway. Glia 2019; 67:1344-1358. [PMID: 30883902 PMCID: PMC6594043 DOI: 10.1002/glia.23609] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2018] [Revised: 01/23/2019] [Accepted: 02/19/2019] [Indexed: 01/11/2023]
Abstract
Astrocytic calcium signaling plays pivotal roles in the maintenance of neural functions and neurovascular coupling in the brain. Vascular endothelial growth factor (VEGF), an original biological substance of vessels, regulates the movement of calcium and potassium ions across neuronal membrane. In this study, we investigated whether and how VEGF regulates glutamate-induced calcium influx in astrocytes. We used cultured astrocytes combined with living cell imaging to detect the calcium influx induced by glutamate. We found that VEGF quickly inhibited the glutamate/hypoxia-induced calcium influx, which was blocked by an AMPA receptor antagonist CNQX, but not D-AP5 or UBP310, NMDA and kainate receptor antagonist, respectively. VEGF increased phosphorylation of PKCα and AMPA receptor subunit GluA2 in astrocytes, and these effects were diminished by SU1498 or calphostin C, a PKC inhibitor. With the pHluorin assay, we observed that VEGF significantly increased membrane insertion and expression of GluA2, but not GluA1, in astrocytes. Moreover, siRNA-produced knockdown of GluA2 expression in astrocytes reversed the inhibitory effect of VEGF on glutamate-induced calcium influx. Together, our results suggest that VEGF reduces glutamate-induced calcium influx in astrocytes via enhancing PKCα-mediated GluA2 phosphorylation, which in turn promotes the membrane insertion and expression of GluA2 and causes AMPA receptors to switch from calcium-permeable to calcium-impermeable receptors, thereby inhibiting astrocytic calcium influx. The present study reveals that excitatory neurotransmitter glutamate-mediated astrocytic calcium influx can be regulated by vascular biological factor via activation of AMPA receptor GluA2 subunit and uncovers a novel coupling mechanism between astrocytes and endothelial cells within the neurovascular unit.
Collapse
Affiliation(s)
- Zeng-Wei Kou
- Department of Neurobiology and State Key Laboratory of Medical Neurobiology, School of Basic Medical Sciences, Shanghai Medical College, Fudan University, Shanghai, PR China.,Institute for Basic Research on Aging and Medicine of School of Basic Medical Sciences and National Clinical Research Center for Aging and Medicine, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai, PR China
| | - Jia-Lin Mo
- Department of Neurobiology and State Key Laboratory of Medical Neurobiology, School of Basic Medical Sciences, Shanghai Medical College, Fudan University, Shanghai, PR China.,Institute for Basic Research on Aging and Medicine of School of Basic Medical Sciences and National Clinical Research Center for Aging and Medicine, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai, PR China
| | - Kun-Wei Wu
- Department of Neurobiology and State Key Laboratory of Medical Neurobiology, School of Basic Medical Sciences, Shanghai Medical College, Fudan University, Shanghai, PR China.,Department of System Biology for Medicine, Institute of Biomedical Sciences, Shanghai Medical College, Fudan University, Shanghai, PR China
| | - Mei-Hong Qiu
- Department of Neurobiology and State Key Laboratory of Medical Neurobiology, School of Basic Medical Sciences, Shanghai Medical College, Fudan University, Shanghai, PR China.,Institute for Basic Research on Aging and Medicine of School of Basic Medical Sciences and National Clinical Research Center for Aging and Medicine, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai, PR China
| | - Ya-Lin Huang
- Department of Neurobiology and State Key Laboratory of Medical Neurobiology, School of Basic Medical Sciences, Shanghai Medical College, Fudan University, Shanghai, PR China.,Department of System Biology for Medicine, Institute of Biomedical Sciences, Shanghai Medical College, Fudan University, Shanghai, PR China
| | - Feng Tao
- Department of Biomedical Sciences, Texas A&M University College of Dentistry, Dallas, Texas
| | - Yu Lei
- Department of Neurobiology and State Key Laboratory of Medical Neurobiology, School of Basic Medical Sciences, Shanghai Medical College, Fudan University, Shanghai, PR China.,Institute for Basic Research on Aging and Medicine of School of Basic Medical Sciences and National Clinical Research Center for Aging and Medicine, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai, PR China
| | - Ling-Ling Lv
- Department of Neurobiology and State Key Laboratory of Medical Neurobiology, School of Basic Medical Sciences, Shanghai Medical College, Fudan University, Shanghai, PR China.,Institute for Basic Research on Aging and Medicine of School of Basic Medical Sciences and National Clinical Research Center for Aging and Medicine, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai, PR China
| | - Feng-Yan Sun
- Department of Neurobiology and State Key Laboratory of Medical Neurobiology, School of Basic Medical Sciences, Shanghai Medical College, Fudan University, Shanghai, PR China.,Institute for Basic Research on Aging and Medicine of School of Basic Medical Sciences and National Clinical Research Center for Aging and Medicine, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai, PR China.,Department of System Biology for Medicine, Institute of Biomedical Sciences, Shanghai Medical College, Fudan University, Shanghai, PR China
| |
Collapse
|
44
|
Increased protein expression of VEGF-A, VEGF-B, VEGF-C and their receptors in the temporal neocortex of pharmacoresistant temporal lobe epilepsy patients. J Neuroimmunol 2019; 328:68-72. [DOI: 10.1016/j.jneuroim.2018.12.007] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Revised: 12/06/2018] [Accepted: 12/19/2018] [Indexed: 12/24/2022]
|
45
|
Torelli MD, Rickard AG, Backer MV, Filonov DS, Nunn NA, Kinev AV, Backer JM, Palmer GM, Shenderova OA. Targeting Fluorescent Nanodiamonds to Vascular Endothelial Growth Factor Receptors in Tumor. Bioconjug Chem 2019; 30:604-613. [PMID: 30633508 DOI: 10.1021/acs.bioconjchem.8b00803] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The increased expression of vascular endothelial growth factor (VEGF) and its receptors is associated with angiogenesis in a growing tumor, presenting potential targets for tumor-selective imaging by way of targeted tracers. Though fluorescent tracers are used for targeted in vivo imaging, the lack of photostability and biocompatibility of many current fluorophores hinder their use in several applications involving long-term, continuous imaging. To address these problems, fluorescent nanodiamonds (FNDs), which exhibit infinite photostability and excellent biocompatibility, were explored as fluorophores in tracers for targeting VEGF receptors in growing tumors. To explore FND utility for imaging tumor VEGF receptors, we used click-chemistry to conjugate multiple copies of an engineered single-chain version of VEGF site-specifically derivatized with trans-cyclooctene (scVEGF-TCO) to 140 nm FND. The resulting targeting conjugates, FND-scVEGF, were then tested for functional activity of the scVEGF moieties through biochemical and tissue culture experiments and for selective tumor uptake in Balb/c mice with induced 4T1 carcinoma. We found that FND-scVEGF conjugates retain high affinity to VEGF receptors in cell culture experiments and observed preferential accumulation of FND-scVEGF in tumors relative to untargeted FND. Microspectroscopy provided unambiguous determination of FND within tissue by way of the unique spectral shape of nitrogen-vacancy induced fluorescence. These results validate and invite the use of targeted FND for diagnostic imaging and encourage further optimization of FND for fluorescence brightness.
Collapse
Affiliation(s)
- Marco D Torelli
- Adámas Nanotechnologies, Inc. , Raleigh , North Carolina 27617 , United States
| | - Ashlyn G Rickard
- Department of Radiation Oncology , Duke University , Durham , North Carolina 27710 United States
| | - Marina V Backer
- SibTech, Inc. , Brookfield , Connecticut 06804 , United States
| | - Daria S Filonov
- Creative Scientist, Inc. , Research Triangle Park , North Carolina 27509 , United States
| | - Nicholas A Nunn
- Adámas Nanotechnologies, Inc. , Raleigh , North Carolina 27617 , United States
| | - Alexander V Kinev
- Creative Scientist, Inc. , Research Triangle Park , North Carolina 27509 , United States
| | - Joseph M Backer
- SibTech, Inc. , Brookfield , Connecticut 06804 , United States
| | - Gregory M Palmer
- Department of Radiation Oncology , Duke University , Durham , North Carolina 27710 United States
| | - Olga A Shenderova
- Adámas Nanotechnologies, Inc. , Raleigh , North Carolina 27617 , United States
| |
Collapse
|
46
|
Zamora‐Gutiérrez D, Guzmán A, Hernández‐Coronado CG, Castillo‐Juárez H, Fierro F, Gutiérrez CG, Bojalil R, Rosales‐Torres AM. Co‐ordinated expression of the VEGF system components in granulosa cells to develop a proangiogenic autocrine milieu during ovarian follicle development. Mol Reprod Dev 2018; 86:156-165. [DOI: 10.1002/mrd.23089] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2018] [Accepted: 11/10/2018] [Indexed: 12/18/2022]
Affiliation(s)
- Diana Zamora‐Gutiérrez
- Doctorado en Ciencias Biológicas y de la SaludUniversidad Autónoma Metropolitana XochimilcoCiudad de México México
| | - Adrian Guzmán
- Departamento Producción Agrícola y AnimalUniversidad Autónoma Metropolitana‐XochimilcoCiudad de México México
| | - Cyndi G. Hernández‐Coronado
- Departamento Producción Agrícola y AnimalUniversidad Autónoma Metropolitana‐XochimilcoCiudad de México México
| | - Héctor Castillo‐Juárez
- Departamento Producción Agrícola y AnimalUniversidad Autónoma Metropolitana‐XochimilcoCiudad de México México
| | - Francisco Fierro
- Departamento de BiotecnologíaUniversidad Autónoma Metropolitana‐IztapalapaCiudad de México México
| | - Carlos G. Gutiérrez
- Departamento de Reproducción, Facultad de Medicina Veterinaria y ZootecniaUniversidad Nacional Autónoma de MéxicoCiudad de México México
| | - Rafael Bojalil
- Departamento de InmunologíaInstituto Nacional de Cardiología Ignacio ChávezCiudad de México México
- Departamento de Atención a la SaludUniversidad Autónoma Metropolitana XochimilcoCiudad de México México
| | - Ana Ma. Rosales‐Torres
- Departamento Producción Agrícola y AnimalUniversidad Autónoma Metropolitana‐XochimilcoCiudad de México México
| |
Collapse
|
47
|
NISHIDA Y, YAMADA Y, KANEMARU H, OHAZAMA A, MAEDA T, SEO K. Vascularization via activation of VEGF-VEGFR signaling is essential for peripheral nerve regeneration . Biomed Res 2018; 39:287-294. [DOI: 10.2220/biomedres.39.287] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Yohei NISHIDA
- Division of Dental Anesthesiology, Niigata University Graduate School of Medical and Dental Sciences
| | - Yurie YAMADA
- Center for Advanced Oral Sciences, Niigata University Graduate School of Medical and Dental Sciences
| | - Hiroko KANEMARU
- Division of Dental Anesthesiology, Niigata University Graduate School of Medical and Dental Sciences
| | - Atsushi OHAZAMA
- Division of Oral Anatomy, Niigata University Graduate School of Medical and Dental Sciences
| | - Takeyasu MAEDA
- Center for Advanced Oral Sciences, Niigata University Graduate School of Medical and Dental Sciences
- Faculty of Dental Medicine, University of Airlangga
| | - Kenji SEO
- Division of Dental Anesthesiology, Niigata University Graduate School of Medical and Dental Sciences
| |
Collapse
|
48
|
Ji S, Xin H, Li Y, Su EJ. FMS-like tyrosine kinase 1 (FLT1) is a key regulator of fetoplacental endothelial cell migration and angiogenesis. Placenta 2018; 70:7-14. [PMID: 30316329 PMCID: PMC6342273 DOI: 10.1016/j.placenta.2018.08.004] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/17/2018] [Revised: 08/15/2018] [Accepted: 08/18/2018] [Indexed: 12/20/2022]
Abstract
INTRODUCTION Fetoplacental angiogenesis plays a vital role in pregnancy outcome. Vascular endothelial growth factor A (VEGFA) is one major regulator of angiogenesis. It primarily binds to FMS-like tyrosine kinase (FLT1) and kinase insert domain receptor (KDR). In most vascular beds, KDR appears to be the main mediator of angiogenesis. However, the role of both receptors within the human placenta remains unknown. METHODS Human fetoplacental ECs were isolated/cultured from placentas of full-term, uncomplicated pregnancies after scheduled Cesarean section. Cells were subjected to RNA interference of either FLT1 or KDR followed by MTT, wound scratch, and tube formation assays. ECs were serum-starved after RNA interference and treated with VEGFA (60 ng/ml), then subjected to western blot to investigate FLT1 or KDR-mediated signaling. All experiments were performed in triplicate utilizing ECs from at least three separate subjects. One-way ANOVA with Tukey post-hoc testing was utilized for statistical analysis. RESULTS Significant knock-down of FLT1 and KDR was confirmed by qPCR (p < 0.01) and WB (p < 0.0001). KDR knock-down decreased EC metabolic activity (p < 0.01), and FLT1 ablation unexpectedly increased EC proliferation (p < 0.01). There was no difference in apoptosis regardless of FLT-1 or KDR knock-down. FLT1 knock-down significantly impaired wound scratch closure (p < 0.0001) and tube formation (p < 0.001). Surprisingly, KDR effects on EC metabolism had no effect on migration, although KDR was important in VEGFA-stimulated Akt and ERK activation. In contrast, FLT1 effects on EC motility were Akt and ERK-independent. CONCLUSION Human fetoplacental EC migration is primarily regulated by FLT1 but not KDR.
Collapse
Affiliation(s)
- Shuhan Ji
- Division of Reproductive Sciences, University of Colorado School of Medicine, Aurora, CO, USA
| | - Hong Xin
- Division of Reproductive Sciences, University of Colorado School of Medicine, Aurora, CO, USA
| | - Yingchun Li
- Division of Reproductive Sciences, University of Colorado School of Medicine, Aurora, CO, USA
| | - Emily J Su
- Division of Reproductive Sciences, University of Colorado School of Medicine, Aurora, CO, USA; Division of Maternal-Fetal Medicine, University of Colorado School of Medicine, Aurora, CO, USA.
| |
Collapse
|
49
|
Poletto V, Rosti V, Biggiogera M, Guerra G, Moccia F, Porta C. The role of endothelial colony forming cells in kidney cancer's pathogenesis, and in resistance to anti-VEGFR agents and mTOR inhibitors: A speculative review. Crit Rev Oncol Hematol 2018; 132:89-99. [PMID: 30447930 DOI: 10.1016/j.critrevonc.2018.09.005] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2018] [Revised: 08/07/2018] [Accepted: 09/08/2018] [Indexed: 12/22/2022] Open
Abstract
Renal cell carcinoma (RCC) is highly dependent on angiogenesis, due to the overactivation of the VHL/HIF/VEGF/VEGFRs axis; this justifies the marked sensitivity of this neoplasm to antiangiogenic agents which, however, ultimately fail to control tumor growth. RCC also frequently shows alterations in the mTOR signaling pathway, and mTOR inhibitors have shown a similar pattern of initial activity/late failure as pure antiangiogenic agents. Understanding mechanisms of resistance to these agents would be key to improve the outcome of our patients. Circulating endothelial cells are a family of mainly bone marrow-derived progenitors, which have been postulated to be responsible of the reactivation of angiogenesis in different tumors. In this review, we shall discuss the complex nature and function of these cells, the evidence pro and contra their contribution to tumor vascularization, especially as far as RCC is concerned, and their possible role in determining resistance to presently available treatments.
Collapse
Affiliation(s)
- Valentina Poletto
- Center for the Study of Myelofibrosis, Research and Experimental Biotechnology Laboratory Area, Istituto di Ricovero e Cura a Carattere Scientifico (I.R.C.C.S.) Policlinico San Matteo Foundation, Piazzale Golgi 19, 27100, Pavia, Italy.
| | - Vittorio Rosti
- Center for the Study of Myelofibrosis, Research and Experimental Biotechnology Laboratory Area, Istituto di Ricovero e Cura a Carattere Scientifico (I.R.C.C.S.) Policlinico San Matteo Foundation, Piazzale Golgi 19, 27100, Pavia, Italy.
| | - Marco Biggiogera
- Laboratory of Cell Biology and Neurobiology, Department of Biology and Biotechnology "Lazzaro Spallanzani", University of Pavia, Italy.
| | - Germano Guerra
- Department of Medicine and Health Sciences "Vincenzo Tiberio", University of Molise, Campobasso, Italy.
| | - Francesco Moccia
- Laboratory of Physiology, Department of Biology and Biotechnology "Lazzaro Spallanzani", University of Pavia, via Forlanini 6, 27100, Pavia, Italy.
| | - Camillo Porta
- Medical Oncology, Istituto di Ricovero e Cura a Carattere Scientifico (I.R.C.C.S.) Policlinico San Matteo Foundation, Piazzale Golgi 19, 27100, Pavia, Italy; present address: Department of Internal Medicine, University of Pavia, and Division of Translational Oncology, IRCCS Istituti Clinici Scientifici Maugeri, via S. Maugeri 10, 27100 Pavia, Italy.
| |
Collapse
|
50
|
Sun J, Huang W, Yang SF, Zhang XP, Yu Q, Zhang ZQ, Yao J, Li KR, Jiang Q, Cao C. Gαi1 and Gαi3mediate VEGF-induced VEGFR2 endocytosis, signaling and angiogenesis. Theranostics 2018; 8:4695-4709. [PMID: 30279732 PMCID: PMC6160771 DOI: 10.7150/thno.26203] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2018] [Accepted: 08/17/2018] [Indexed: 12/21/2022] Open
Abstract
VEGF binding to VEGFR2 leads to VEGFR2 endocytosis and downstream signaling activation to promote angiogenesis. Methods: Using genetic strategies, we tested the requirement of α subunits of heterotrimeric G proteins (Gαi1/3) in the process. Results: Gαi1/3 are located in the VEGFR2 endocytosis complex (VEGFR2-Ephrin-B2-Dab2-PAR-3), where they are required for VEGFR2 endocytosis and downstream signaling transduction. Gαi1/3 knockdown, knockout or dominant negative mutation inhibited VEGF-induced VEGFR2 endocytosis, and downstream Akt-mTOR and Erk-MAPK activation. Functional studies show that Gαi1/3 shRNA inhibited VEGF-induced proliferation, invasion, migration and vessel-like tube formation of HUVECs. In vivo, Gαi1/3 shRNA lentivirus inhibited alkali burn-induced neovascularization in mouse cornea. Further, oxygen-induced retinopathy (OIR)-induced retinal neovascularization was inhibited by intravitreal injection of Gαi1/3 shRNA lentivirus. Moreover, in vivo angiogenesis by alkali burn and OIR was significantly attenuated in Gαi1/3 double knockout mice. Significantly, Gαi1/3 proteins are upregulated in proliferative retinal tissues of proliferative diabetic retinopathy (PDR) patients. Conclusion: These results provide mechanistic insights into the critical role played by Gαi1/3 proteins in VEGF-induced VEGFR2 endocytosis, signaling and angiogenesis.
Collapse
|