51
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Barzegar E, Nouri M, Mousavi S, Ahmadi A, Mojtahedzadeh M. Vasopressin in Septic Shock; Assessment of Sepsis Biomarkers: A Randomized, Controlled Trial. Indian J Crit Care Med 2017; 21:578-584. [PMID: 28970657 PMCID: PMC5613609 DOI: 10.4103/ijccm.ijccm_258_17] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
Background and Aims: Vasopressin (VP) in sepsis apart from vasoconstrictive effect may have some immunomodulatory effects. The aim of this study was to evaluate the effect of VP on different aspect of sepsis by measuring of sepsis biomarkers. Materials and Methods: In this trial, a total number of 42 septic shock patients were included. The first group received norepinephrine (NE) infusion to reach the target mean arterial pressure (MAP) of ≥ 65 mm Hg and the second group received arginine vasopressin (AVP) infusion in addition to NE. Serum lactate, C-reactive protein (CRP), interleukin-6 (IL-6), IL-10, pentraxin 3 (PTX3), angiopoietin 1 and 2 (Ang 1 and 2) levels were assessed. Results: Level of IL-6 and IL-10 decreased, but there was no significant difference between the two groups after 48 h. CRP and PTX3 levels were not also significantly different between groups. Although Angs were not statistically different, there was a trend toward higher Ang-1 in and lower Ang 2 in AVP group after 24 and 48 h. In addition, lactate level did not differ between NE and AVP groups. There was no interaction between VP and hydrocortisone use on IL-6, IL-10, and PTX3, but a significant statistical interaction on Ang 1 and Ang 2 were observed. Conclusions: Although analysis of sepsis biomarkers showed no significant difference between two groups, no immunomodulatory effect for VP alone, subgroup analysis of hydrocortisone used in this study showed that the combination of glucocorticoids and AVP had a significant effect on Angs level which eventually causes less endothelial permeability and higher MAP in this group of patients.
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Affiliation(s)
- Elchin Barzegar
- Department of Clinical Pharmacy (Pharmacotherapy), School of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Masoumeh Nouri
- Department of Clinical Pharmacy (Pharmacotherapy), School of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Sarah Mousavi
- Department of Clinical Pharmacy and Pharmacy Practice, School of Pharmacy, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Arezoo Ahmadi
- Department of Anaesthesiology and Critical Care, Sina Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | - Mojtaba Mojtahedzadeh
- Department of Clinical Pharmacy (Pharmacotherapy), School of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
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Kang MK, Park SH, Kim YH, Lee EJ, Antika LD, Kim DY, Choi YJ, Kang YH. Dietary Compound Chrysin Inhibits Retinal Neovascularization with Abnormal Capillaries in db/db Mice. Nutrients 2016; 8:nu8120782. [PMID: 27918469 PMCID: PMC5188437 DOI: 10.3390/nu8120782] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2016] [Revised: 11/23/2016] [Accepted: 11/28/2016] [Indexed: 12/13/2022] Open
Abstract
Diabetic retinopathy (DR) develops in a significant proportion of patients with chronic diabetes, characterized by retinal macular edema and abnormal retinal vessel outgrowth leading to vision loss. Chrysin, a naturally-occurring flavonoid found in herb and honeycomb, has anti-inflammatory, antioxidant, and anti-cancer properties. This study sought to determine the protective effects of chrysin on retinal neovascularization with abnormal vessels and blood-retinal barrier (BRB) breakdown in 33 mM glucose-exposed human retinal endothelial cells and in db/db mouse eyes. High glucose caused retinal endothelial apoptotic injury, which was inhibited by submicromolar chrysin. This compound diminished the enhanced induction of HIF-1α, vascular endothelial growth factor (VEGF), and VEGF receptor-2 (VEGFR2) in high glucose-exposed retinal endothelial cells. Consistently, oral administration of 10 mg/kg chrysin reduced the induction of these proteins in db/db mouse eye tissues. In addition, chrysin restored the decrement of VE-cadherin and ZO-1 junction proteins and PECAM-1 in hyperglycemia-stimulated retinal endothelial cells and diabetic mouse retina, possibly maintaining tight cell-cell interactions of endothelial cells and pericytes. Anti-apoptotic chrysin reduced the up-regulation of Ang-1, Ang-2, and Tie-2 crucial to retinal capillary occlusion and BRB permeability. Furthermore, orally treating chrysin inhibited acellular capillary formation, neovascularization, and vascular leakage observed in diabetic retinas. These observations demonstrate, for the first time, that chrysin had a capability to encumber diabetes-associated retinal neovascularization with microvascular abnormalities and BRB breakdown.
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Affiliation(s)
- Min-Kyung Kang
- Department of Food Science and Nutrition, Hallym University, Chuncheon 24252, Korea.
| | - Sin-Hye Park
- Department of Food Science and Nutrition, Hallym University, Chuncheon 24252, Korea.
| | - Yun-Ho Kim
- Department of Food Science and Nutrition, Hallym University, Chuncheon 24252, Korea.
| | - Eun-Jung Lee
- Department of Food Science and Nutrition, Hallym University, Chuncheon 24252, Korea.
| | - Lucia Dwi Antika
- Department of Food Science and Nutrition, Hallym University, Chuncheon 24252, Korea.
| | - Dong Yeon Kim
- Department of Food Science and Nutrition, Hallym University, Chuncheon 24252, Korea.
| | - Yean-Jung Choi
- Department of Food Science and Nutrition, Hallym University, Chuncheon 24252, Korea.
| | - Young-Hee Kang
- Department of Food Science and Nutrition, Hallym University, Chuncheon 24252, Korea.
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53
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Meng H, Song Y, Zhu J, Liu Q, Lu P, Ye N, Zhang Z, Pang Y, Qi J, Wu H. LRG1 promotes angiogenesis through upregulating the TGF‑β1 pathway in ischemic rat brain. Mol Med Rep 2016; 14:5535-5543. [PMID: 27840991 PMCID: PMC5355675 DOI: 10.3892/mmr.2016.5925] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2015] [Accepted: 10/05/2016] [Indexed: 11/25/2022] Open
Abstract
Stroke is a life-threatening disease that results in significant disability in the human population. Despite the advances in current stroke therapies, a host of patients do not benefit from the conventional treatments. Thus, more effective therapies are required. It has been previously reported that leucine-rich-α2-glycoprotein 1 (LRG1) is crucial during the formation of new blood vessels in retinal diseases. However, the function of LRG1 in the brain during the neovessel growth process following ischemic stroke has not been fully elucidated and the mechanism underlying its effect on angiogenesis remains unclear. The purpose of the current study was to demonstrate whether LRG1 may promote angiogenesis through the transforming growth factor (TGF)-β1 signaling pathway in ischemic rat brain following middle cerebral artery occlusion (MCAO). In the present study, the spatial and temporal expression of LRG1, TGF-β1, vascular endothelial growth factor (VEGF) and angiopoietin-2 (Ang-2) were detected in ischemic rat brain following MCAO using reverse transcription-quantitative polymerase chain reaction (RT-qPCR), western blot analysis and immunohistochemistry. CD34 immunohistochemistry staining was used as an indicator of microvessel density (MVD). The RT-qPCR and western blotting results revealed that the levels of LRG1 and TGF-β1 mRNA and protein expression were significantly increased as early as 6 and 12 h after MCAO (P<0.05), respectively, peaked at 3 days and persisted at significantly higher level until 14 days, in comparison with the control group. Additionally, VEGF and Ang-2 were also increased following MCAO. Furthermore, the immunohistochemistry results suggested that the MVD was increased following MCAO. In addition, the results also revealed that the percentage of LRG1-positive cells was positively correlated with the percentage of TGF-β1-positive cells, and the percentage of LRG1-positive and TGF-β1-positive cells had a positively correlation with the MVD. Taken together, the present study indicated that LRG1 may promote angiogenesis through upregulating the TGF-β1 signaling pathway in ischemic rat brain following MCAO. This may provide a potential therapeutic target for the treatment of ischemic stroke.
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Affiliation(s)
- Hongmei Meng
- Department of Pathology, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150001, P.R. China
| | - Yuejia Song
- Department of Endocrinology, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150001, P.R. China
| | - Jiyuan Zhu
- Department of Pathology, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150001, P.R. China
| | - Qi Liu
- Department of Pathology, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150001, P.R. China
| | - Pengtian Lu
- Department of Pathology, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150001, P.R. China
| | - Na Ye
- Department of Pathology, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150001, P.R. China
| | - Zhen Zhang
- Department of Pathology, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150001, P.R. China
| | - Yuxin Pang
- Department of Pathology, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150001, P.R. China
| | - Jiping Qi
- Department of Pathology, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150001, P.R. China
| | - He Wu
- Department of Pathology, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150001, P.R. China
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54
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Loffredo S, Bova M, Suffritti C, Borriello F, Zanichelli A, Petraroli A, Varricchi G, Triggiani M, Cicardi M, Marone G. Elevated plasma levels of vascular permeability factors in C1 inhibitor-deficient hereditary angioedema. Allergy 2016; 71:989-96. [PMID: 26873113 DOI: 10.1111/all.12862] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/08/2016] [Indexed: 12/31/2022]
Abstract
BACKGROUND Hereditary angioedema with C1 inhibitor deficiency (C1-INH-HAE) is a rare inherited genetic disease characterized by recurrent swelling episodes of the skin, gastrointestinal tract, and upper airways. Angioedema attacks result from increased vascular permeability due to the release of bradykinin from high molecular weight kininogen. Currently, there are no biomarkers predicting the frequency of angioedema attacks. Vascular permeability is modulated by several factors, including vascular endothelial growth factors (VEGFs) and angiopoietins (Angs). As increased circulating levels of VEGFs and Angs have been observed in diseases associated with higher vascular permeability (e.g., systemic capillary leak syndrome and sepsis), we sought to analyze plasma concentrations of VEGFs and Angs in patients with C1-INH-HAE. METHODS Sixty-eight healthy controls and 128 patients with C1-INH-HAE were studied. Concentrations of angiogenic (VEGF-A, Ang1, Ang2), anti-angiogenic (VEGF-A165b ) and lymphangiogenic (VEGF-C) factors were evaluated by ELISA. C1-INH functional activity was assessed by EIA. RESULTS Plasma concentrations of VEGF-A, VEGF-C, Ang1, and Ang2 were higher in patients with C1-INH-HAE in remission than in healthy controls. Concentration of VEGF-A was further increased in patients with lower C1-INH functional activity. Patients with C1-INH-HAE experiencing more than 12 angioedema attacks per year were characterized by higher plasma levels of VEGF-A, VEGF-C, and Ang2 compared with the other patients. CONCLUSIONS We hypothesize that VEGFs and Angs induce a state of 'vascular preconditioning' that may predispose to angioedema attacks. In addition, the identification of increased plasma levels of VEGFs and Angs in patients with C1-INH-HAE may prompt the investigation of VEGFs and Angs as biomarkers of C1-INH-HAE severity.
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Affiliation(s)
- S. Loffredo
- Department of Translational Medical Sciences and Center for Basic and Clinical Immunology Research (CISI); University of Naples Federico II; Naples Italy
| | - M. Bova
- Department of Translational Medical Sciences and Center for Basic and Clinical Immunology Research (CISI); University of Naples Federico II; Naples Italy
| | - C. Suffritti
- Department of Biomedical and Clinical Sciences Luigi Sacco; Luigi Sacco Hospital Milan; University of Milan; Milan Italy
| | - F. Borriello
- Department of Translational Medical Sciences and Center for Basic and Clinical Immunology Research (CISI); University of Naples Federico II; Naples Italy
| | - A. Zanichelli
- Department of Biomedical and Clinical Sciences Luigi Sacco; Luigi Sacco Hospital Milan; University of Milan; Milan Italy
| | - A. Petraroli
- Department of Translational Medical Sciences and Center for Basic and Clinical Immunology Research (CISI); University of Naples Federico II; Naples Italy
| | - G. Varricchi
- Department of Translational Medical Sciences and Center for Basic and Clinical Immunology Research (CISI); University of Naples Federico II; Naples Italy
| | - M. Triggiani
- Division of Allergy and Clinical Immunology; University of Salerno; Salerno Italy
| | - M. Cicardi
- Department of Biomedical and Clinical Sciences Luigi Sacco; Luigi Sacco Hospital Milan; University of Milan; Milan Italy
| | - G. Marone
- Department of Translational Medical Sciences and Center for Basic and Clinical Immunology Research (CISI); University of Naples Federico II; Naples Italy
- CNR Institute of Experimental Endocrinology and Oncology ‘G. Salvatore’; Naples Italy
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55
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Bi X, Niu J, Ding W, Zhang M, Yang M, Gu Y. Angiopoietin-1 attenuates angiotensin II-induced ER stress in glomerular endothelial cells via a Tie2 receptor/ERK1/2-p38 MAPK-dependent mechanism. Mol Cell Endocrinol 2016; 428:118-32. [PMID: 27033326 DOI: 10.1016/j.mce.2016.03.027] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/22/2015] [Revised: 03/13/2016] [Accepted: 03/21/2016] [Indexed: 12/11/2022]
Abstract
Research has indicated that endoplasmic reticulum (ER) stress in endothelial cells affects vascular pathologies and induces cellular dysfunction and apoptosis. Angiopoietin1 (Angpt1) has been shown to have therapeutic potential in some vascular diseases, including chronic kidney disease. This study showed that Angpt1 is a powerful factor that attenuated ER stress-induced cellular dysfunction and apoptosis in glomerular endothelial cells (GEnCs). Furthermore, Angpt1 significantly decreased the angiotensin II (Ang II)-induced expression of the ER stress response proteins GRP78, GRP94, p-PERK and CHOP. These results suggest that the Angpt1-mediated cellular protection may occur downstream of the ER stress response. In addition, both specific inhibitors and siRNAs for Tie2 reversed these changes, implying the importance of Tie2 receptor activation in the signalling pathways that prevent ER stress. The protective effects of Angpt1 are related to the activation of two downstream signalling pathways, ERK1/2 and p38 MAPK. The inhibition of these pathways with specific inhibitors, PD98059 and SB203580, respectively, partially increased the expression of chaperones that assist in folding proteins in the ER and reduce the protective effects of Angpt1. In conclusion, Angpt1 attenuated ER stress-induced cellular dysfunction and apoptosis via the Tie2 receptor/ERK1/2-p38 MAPK pathways in GEnCs. This study may provide insights into a novel underlying mechanism and a strategy for alleviating ER stress-induced injury.
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Affiliation(s)
- Xiao Bi
- Division of Nephrology, Shanghai Fifth People's Hospital, Fudan University, Shanghai, China
| | - Jianying Niu
- Division of Nephrology, Shanghai Fifth People's Hospital, Fudan University, Shanghai, China
| | - Wei Ding
- Division of Nephrology, Shanghai Fifth People's Hospital, Fudan University, Shanghai, China
| | - Minmin Zhang
- Division of Nephrology, Huashan Hospital, Fudan University, Shanghai, China
| | - Min Yang
- Division of Nephrology, Shanghai Fifth People's Hospital, Fudan University, Shanghai, China.
| | - Yong Gu
- Division of Nephrology, Huashan Hospital, Fudan University, Shanghai, China.
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56
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Fang Z, He QW, Li Q, Chen XL, Baral S, Jin HJ, Zhu YY, Li M, Xia YP, Mao L, Hu B. MicroRNA-150 regulates blood-brain barrier permeability via Tie-2 after permanent middle cerebral artery occlusion in rats. FASEB J 2016; 30:2097-107. [PMID: 26887441 DOI: 10.1096/fj.201500126] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2015] [Accepted: 01/30/2016] [Indexed: 12/28/2022]
Abstract
The mechanism of blood-brain barrier (BBB) disruption, involved in poststroke edema and hemorrhagic transformation, is important but elusive. We investigated microRNA-150 (miR-150)-mediated mechanism in the disruption of BBB after stroke in rats. We found that up-regulation of miR-150 increased permeability of BBB as detected by MRI after permanent middle cerebral artery occlusion in vivo as well as increased permeability of brain microvascular endothelial cells after oxygen-glucose deprivation in vitro. The expression of claudin-5, a key tight junction protein, was decreased in the ischemic boundary zone after up-regulation of miR-150. We found in brain microvascular endothelial cells that overexpression of miR-150 decreased not only cell survival rate but also the expression levels of claudin-5 after oxygen-glucose deprivation. With dual-luciferase assay, we confirmed that miR-150 could directly regulate the angiopoietin receptor Tie-2. Moreover, silencing Tie-2 with lentivirus-delivered small interfering RNA reversed the effect of miR-150 on endothelial permeability, cell survival, and claudin-5 expression. Furthermore, poststroke treatment with antagomir-150, a specific miR-150 antagonist, contributed to BBB protection, infarct volume reduction, and amelioration of neurologic deficits. Collectively, our findings suggested that miR-150 could regulate claudin-5 expression and endothelial cell survival by targeting Tie-2, thus affecting the permeability of BBB after permanent middle cerebral artery occlusion in rats, and that miR-150 might be a potential alternative target for the treatment of stroke.-Fang, Z., He, Q.-W., Li, Q., Chen, X.-L., Baral, S., Jin, H.-J., Zhu, Y.-Y., Li, M., Xia, Y.-P., Mao, L., Hu, B. MicroRNA-150 regulates blood-brain barrier permeability via Tie-2 after permanent middle cerebral artery occlusion in rats.
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Affiliation(s)
- Zhi Fang
- Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Quan-Wei He
- Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Qian Li
- Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Xiao-Lu Chen
- Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Suraj Baral
- Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Hui-Juan Jin
- Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yi-Yi Zhu
- Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Man Li
- Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yuan-Peng Xia
- Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Ling Mao
- Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Bo Hu
- Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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Aguirre Palma LM, Flamme H, Gerke I, Kreuzer KA. Angiopoietins Modulate Survival, Migration, and the Components of the Ang-Tie2 Pathway of Chronic Lymphocytic Leukaemia (CLL) Cells In Vitro. CANCER MICROENVIRONMENT 2016; 9:13-26. [PMID: 26846110 DOI: 10.1007/s12307-016-0180-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2015] [Accepted: 01/24/2016] [Indexed: 12/15/2022]
Abstract
In actuality, chronic lymphocytic leukaemia (CLL) remains an incurable haematopoietic malignancy of high prevalence amongst elderly populations in the West. Malignant CLL cells characteristically accumulate in the peripheral blood, bone marrow, lymph nodes, and spleen of CLL patients. There is evidence that CLL cells express Ang2 and Tie1, two central components of the Ang-Tie2 pro-angiogenic pathway. Central to blood vessel development and maintenance, at present it remains unclear how the Ang-Tie2 pathway modulates CLL pathophysiology. Here we evaluate the status of the Ang-Tie2 pathway in CLL cells and assess Ang1 levels in plasma/cell medium from CLL samples. To understand how angiopoietins in the microenvironment regulate the components of Ang-Tie2 pathway, survival, migration, and metabolic fitness of CLL cells, we exposed CLL cells to recombinant angiopoietins. CLL plasma and CLL cells in culture present significant lower levels of Ang1. CLL cells simultaneously express Ang1, Ang2, and Tie1 mRNA, but lack that of Tie2 and its regulator, VE-PTP. Exposure to Ang1 confers survival advantage in the long-term, whereas Ang2 and trebananib, an angiopoietin blocker, proved detrimental. Angiopoietins differentially modulate expression of Ang1, Ang2, and Tie1 transcripts. Ang2, but not Ang1, induces the concomitant and transient expression of Tie2 and VE-PTP mRNA. Both angiopoietins, particularly Ang2, increase CLL-Tie1 expression and Ang1 clearly induces chemotaxis and transendothelial-like migration of CLL cells. Besides, changes in caspase and ATP content corroborate the sensitivity of CLL cells to angiopoietin exposure. Altogether, this work shows that angiopoietins regulate the fate of CLL cells in a Tie2-independent manner and highlights the potential of the Ang-Tie2 pathway as a therapeutic target in CLL research.
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Affiliation(s)
| | - Hanna Flamme
- Department I of Internal Medicine, University at Cologne, Kerpener Strasse 62, Cologne, Germany
| | - Iris Gerke
- Manitoba Institute of Cell Biology, University of Manitoba, Winnipeg, MB, Canada
| | - Karl-Anton Kreuzer
- Department I of Internal Medicine, University at Cologne, Kerpener Strasse 62, Cologne, Germany.
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Han Y, Wang X, Wang B, Jiang G. The progress of angiogenic factors in the development of leukemias. Intractable Rare Dis Res 2016; 5:6-16. [PMID: 26989643 PMCID: PMC4761589 DOI: 10.5582/irdr.2015.01048] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Angiogenic factors have been demonstrated to play important roles in modulating angiogenesis of solid tumors. Recently, accumulating studies extensively indicated that some angiogenic factors widely exist in malignant cells of hematologic malignancy, which regulated the expression of a number of genes that were involved in abnormal proliferation, differentiation and apoptosis of these cells. With deep research of angiogenic factors, its expression, function and regulatory mechanism were gradually elucidated, and some of them were related to the development and prognosis of leukemia, or provide more possible strategies for treatment of patients with leukemia. Herein, we summarize the progress in study of some important angiogenic factors and hematological malignancies.
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Affiliation(s)
- Yang Han
- Key Laboratory for Rare & Uncommon Diseases of Shandong Province, Institute of Basic Medicine, Shandong Academy of Medical Sciences, Ji'nan, Shandong, China
- School of Medicine and Life Sciences, Ji'nan University, Ji'nan, Shandong, China
| | - Xidi Wang
- Laboratory Department, People's Hospital of Zhangqiu City, Zhangqiu, Shandong, China
| | - Bingping Wang
- Department of Hematology, Shengli Oilfield Central Hospital, Dongying, China
| | - Guosheng Jiang
- Key Laboratory for Rare & Uncommon Diseases of Shandong Province, Institute of Basic Medicine, Shandong Academy of Medical Sciences, Ji'nan, Shandong, China
- Address correspondence to: Dr. Guosheng Jiang, Key Laboratory for Rare & Uncommon Diseases of Shandong Province, Institute of Basic Medicine, Shandong Academy of Medical Sciences, NO.18877 of Jingshi Road, Ji'nan, Shandong, China. E-mail:
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59
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Xu J, Cai H, Meng Q, Li Y, Chen G, Fang W, Long X. IL-1β-regulating angiogenic factors expression in perforated temporomandibular disk cells via NF-κB pathway. J Oral Pathol Med 2016; 45:605-12. [PMID: 26775638 DOI: 10.1111/jop.12420] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/15/2015] [Indexed: 01/01/2023]
Abstract
BACKGROUND A high density of blood vessels is observed in the perforated disks of temporomandibular joint (TMJ), but the underlying mechanism is unknown. This study aimed to explore the regulation of disk angiogenesis in the perforated disks. METHODS Expressions of vascular endothelial growth factor (VEGF), angiogenin-1 (Ang-1), chondromodulin-1 (ChM-1), and thrombospondins-1 (TSP-1) were compared between healthy and perforated TMJ disk cells with or without interleukin-1β (IL-1β) incubation. The tube formation, cell migration, and expressions of matrix-metalloproteinases (MMPs) in human umbilical vein endothelial cell line (HUV-EC-C) were investigated in conditional media of disk cells. Western blot was performed to determine protein level of VEGF, Ang-1, ChM-1 and TSP-1 in IL-1β-induced disk cells cultured by NF-κB- or P38-specific pathway inhibitors, respectively. RESULTS Conditional media from perforated disk cells induced more tube formation, cell migration, and MMPs' expression in HUV-EC-C. Expressions of VEGF and Ang-1 were significantly higher, and ChM-1 and TSP-1 were lower in perforated disks compared to healthy disks. The VEGFA concentration was 291.1 ± 36.09 pg/ml in perforated disk cell conditioned media, markedly larger than that in NDCCM (144.9 ± 33.69 pg/ml). IL-1β induced VEGF through NF-κB signaling pathway and Ang-1 through p38 MAPK pathway, while repressed expression of ChM-1 and TSP-1 was through NF-κB pathway. Blockade of each pathway markedly restrained inducing effect of cultural media on HUV-EC-C tube formation and migration. CONCLUSIONS Perforated disk cells secreted more angiogenic factors which might induced via NF-κB pathway.
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Affiliation(s)
- Jie Xu
- State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education (KLOBM), School and Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Hengxing Cai
- State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education (KLOBM), School and Hospital of Stomatology, Wuhan University, Wuhan, China.,Department of Oral and Maxillofacial Surgery, School and Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Qinggong Meng
- State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education (KLOBM), School and Hospital of Stomatology, Wuhan University, Wuhan, China.,Department of Oral and Maxillofacial Surgery, School and Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Yingjie Li
- State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education (KLOBM), School and Hospital of Stomatology, Wuhan University, Wuhan, China.,Department of Oral and Maxillofacial Surgery, School and Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Guoxin Chen
- State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education (KLOBM), School and Hospital of Stomatology, Wuhan University, Wuhan, China.,Department of Oral and Maxillofacial Surgery, School and Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Wei Fang
- State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education (KLOBM), School and Hospital of Stomatology, Wuhan University, Wuhan, China.,Department of Oral and Maxillofacial Surgery, School and Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Xing Long
- State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education (KLOBM), School and Hospital of Stomatology, Wuhan University, Wuhan, China.,Department of Oral and Maxillofacial Surgery, School and Hospital of Stomatology, Wuhan University, Wuhan, China
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Lee PH, Kim BG, Seo HJ, Park JS, Lee JH, Park SW, Kim DJ, Park HS, Park CS, Jang AS. Circulating angiopoietin-1 and -2 in patients with stable and exacerbated asthma. Ann Allergy Asthma Immunol 2016; 116:339-43. [PMID: 26776887 DOI: 10.1016/j.anai.2015.12.011] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2015] [Revised: 11/11/2015] [Accepted: 12/02/2015] [Indexed: 12/25/2022]
Abstract
BACKGROUND Angiopoietin (Ang)-1 and -2 are involved in the pathogenesis of asthma and have been identified as markers of asthma severity. OBJECTIVE To determine the relation between circulating angiopoietins and clinical variables of patients with asthma. METHODS Fifty patients with bronchial asthma and 25 healthy controls were enrolled. Ang1 and Ang2 plasma levels were analyzed in patients with stable and exacerbated asthma. RESULTS Plasma Ang1 levels were 28.4 ± 4.01 pg/mg in patients with bronchial asthma and 21.2 ± 5.21 pg/mg in healthy controls. Plasma Ang2 levels were 23.96 ± 1.38 pg/mg in patients with bronchial asthma compared with 36.8 ± 4.46 pg/mg in healthy controls (P = .010). The ratio of Ang2 to Ang1 was lower in patients with asthma than in control subjects. Plasma Ang1 concentrations were correlated with the ratio of forced expiratory volume in 1 second (FEV1) to forced vital capacity (FVC), and plasma Ang2 levels were correlated with FEV1 percentage of predicted, FEV1/FVC, and total immunoglobulin E values. The ratio of Ang2 to Ang1 was correlated with FEV1 percentage of predicted and FEV1/FVC. Although plasma Ang1 levels tended to be lower in the exacerbated state than in the stable state in patients with asthma, Ang2 levels were higher in the exacerbated state than in the stable state in patients with asthma (P = .001). Plasma Ang2 levels were correlated with initial eosinophil proportions and initial neutrophil proportions. Plasma Ang2 levels and the ratio of Ang2 to Ang1 were correlated with blood eosinophil proportions in the exacerbated state. CONCLUSION These results indicate that circulating angiopoietins could be a useful marker of asthma exacerbation.
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Affiliation(s)
- Pureun-Haneul Lee
- Department of Internal Medicine, Soonchunhyang University Bucheon Hospital, Bucheon, Republic of Korea
| | - Byeong-Gon Kim
- Department of Internal Medicine, Soonchunhyang University Bucheon Hospital, Bucheon, Republic of Korea
| | - Hyun-Jeong Seo
- Department of Internal Medicine, Soonchunhyang University Bucheon Hospital, Bucheon, Republic of Korea
| | - Jong-Sook Park
- Department of Internal Medicine, Soonchunhyang University Bucheon Hospital, Bucheon, Republic of Korea
| | - June-Hyuck Lee
- Department of Internal Medicine, Soonchunhyang University Bucheon Hospital, Bucheon, Republic of Korea
| | - Sung-Woo Park
- Department of Internal Medicine, Soonchunhyang University Bucheon Hospital, Bucheon, Republic of Korea
| | - Do-Jin Kim
- Department of Internal Medicine, Soonchunhyang University Bucheon Hospital, Bucheon, Republic of Korea
| | - Hae-Sim Park
- Department of Allergy and Clinical Immunology, Ajou University School of Medicine, Suwon, Republic of Korea
| | - Choon-Sik Park
- Department of Internal Medicine, Soonchunhyang University Bucheon Hospital, Bucheon, Republic of Korea
| | - An-Soo Jang
- Department of Internal Medicine, Soonchunhyang University Bucheon Hospital, Bucheon, Republic of Korea.
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Bold G, Schnell C, Furet P, McSheehy P, Brüggen J, Mestan J, Manley PW, Drückes P, Burglin M, Dürler U, Loretan J, Reuter R, Wartmann M, Theuer A, Bauer-Probst B, Martiny-Baron G, Allegrini P, Goepfert A, Wood J, Littlewood-Evans A. A Novel Potent Oral Series of VEGFR2 Inhibitors Abrogate Tumor Growth by Inhibiting Angiogenesis. J Med Chem 2015; 59:132-46. [DOI: 10.1021/acs.jmedchem.5b01582] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Guido Bold
- Oncology Research, Novartis Institutes for BioMedical Research, 4002 Basel, Switzerland
| | - Christian Schnell
- Oncology Research, Novartis Institutes for BioMedical Research, 4002 Basel, Switzerland
| | - Pascal Furet
- Oncology Research, Novartis Institutes for BioMedical Research, 4002 Basel, Switzerland
| | - Paul McSheehy
- Oncology Research, Novartis Institutes for BioMedical Research, 4002 Basel, Switzerland
| | - Josef Brüggen
- Oncology Research, Novartis Institutes for BioMedical Research, 4002 Basel, Switzerland
| | - Jürgen Mestan
- Oncology Research, Novartis Institutes for BioMedical Research, 4002 Basel, Switzerland
| | - Paul W. Manley
- Oncology Research, Novartis Institutes for BioMedical Research, 4002 Basel, Switzerland
| | - Peter Drückes
- Oncology Research, Novartis Institutes for BioMedical Research, 4002 Basel, Switzerland
| | - Marion Burglin
- Oncology Research, Novartis Institutes for BioMedical Research, 4002 Basel, Switzerland
| | - Ursula Dürler
- Oncology Research, Novartis Institutes for BioMedical Research, 4002 Basel, Switzerland
| | - Jacqueline Loretan
- Oncology Research, Novartis Institutes for BioMedical Research, 4002 Basel, Switzerland
| | - Robert Reuter
- Oncology Research, Novartis Institutes for BioMedical Research, 4002 Basel, Switzerland
| | - Markus Wartmann
- Oncology Research, Novartis Institutes for BioMedical Research, 4002 Basel, Switzerland
| | - Andreas Theuer
- Oncology Research, Novartis Institutes for BioMedical Research, 4002 Basel, Switzerland
| | - Beatrice Bauer-Probst
- Oncology Research, Novartis Institutes for BioMedical Research, 4002 Basel, Switzerland
| | - Georg Martiny-Baron
- Oncology Research, Novartis Institutes for BioMedical Research, 4002 Basel, Switzerland
| | - Peter Allegrini
- Oncology Research, Novartis Institutes for BioMedical Research, 4002 Basel, Switzerland
| | - Arnaud Goepfert
- Oncology Research, Novartis Institutes for BioMedical Research, 4002 Basel, Switzerland
| | - Jeanette Wood
- Oncology Research, Novartis Institutes for BioMedical Research, 4002 Basel, Switzerland
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Zinter MS, Spicer A, Orwoll BO, Alkhouli M, Dvorak CC, Calfee CS, Matthay MA, Sapru A. Plasma angiopoietin-2 outperforms other markers of endothelial injury in prognosticating pediatric ARDS mortality. Am J Physiol Lung Cell Mol Physiol 2015; 310:L224-31. [PMID: 26660787 DOI: 10.1152/ajplung.00336.2015] [Citation(s) in RCA: 64] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2015] [Accepted: 12/06/2015] [Indexed: 01/06/2023] Open
Abstract
Angiopoietin-2 (Ang-2) is a key mediator of pulmonary vascular permeability. This study tested the association between plasma Ang-2 and mortality in pediatric acute respiratory distress syndrome (ARDS), with stratification for prior hematopoietic cellular transplantation (HCT), given the severe, yet poorly understood, ARDS phenotype of this subgroup. We enrolled 259 children <18 years of age with ARDS; 25 had prior HCT. Plasma Ang-2, von Willebrand Factor antigen (vWF), and vascular endothelial growth factor (VEGF) were measured on ARDS days 1 and 3 and correlated with patient outcomes. Day 1 and day 3 Ang-2 levels were associated with mortality independent of age, sex, race, and P/F ratio [odds ratio (OR) 3.7, 95% CI 1.1-11.5, P = 0.027; and OR 10.2, 95% confidence interval (CI) 2.2-46.5, P = 0.003, for each log10 increase in Ang-2]. vWF was associated with mortality (P = 0.027), but VEGF was not. The association between day 1 Ang-2 and mortality was independent of levels of both vWF and VEGF (OR 3.6, 95% CI 1.1-12.1, P = 0.039, for each log10 increase in Ang-2). 45% of the cohort had a rising Ang-2 between ARDS day 1 and 3 (adjusted mortality OR 3.3, 95% CI 1.2-9.2, P = 0.026). HCT patients with a rising Ang-2 had 70% mortality compared with 13% mortality for those without (OR 16.3, 95% CI 1.3-197.8, P = 0.028). Elevated plasma levels of Ang-2 were associated with mortality independent of vWF and VEGF. A rising Ang-2 between days 1 and 3 was strongly associated with mortality, particularly in pediatric HCT patients, suggesting vulnerability to ongoing endothelial damage.
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Affiliation(s)
- Matt S Zinter
- Division of Critical Care Medicine, Department of Pediatrics, School of Medicine, University of California, San Francisco, California; University of California, San Francisco, Benioff Children's Hospital, San Francisco, California
| | - Aaron Spicer
- Division of Critical Care Medicine, Department of Pediatrics, School of Medicine, University of California, San Francisco, California; University of California, San Francisco, Benioff Children's Hospital, San Francisco, California
| | - Benjamin O Orwoll
- Division of Critical Care Medicine, Department of Pediatrics, School of Medicine, University of California, San Francisco, California; University of California, San Francisco, Benioff Children's Hospital, San Francisco, California
| | - Mustafa Alkhouli
- Division of Critical Care Medicine, Department of Pediatrics, School of Medicine, University of California, San Francisco, California; University of California, San Francisco, Benioff Children's Hospital, San Francisco, California
| | - Christopher C Dvorak
- Division of Allergy, Immunology, and Blood and Marrow Transplantation, Department of Pediatrics, School of Medicine, University of California, San Francisco, California; University of California, San Francisco, Benioff Children's Hospital, San Francisco, California
| | - Carolyn S Calfee
- Division of Pulmonary and Critical Care Medicine, Departments of Anesthesia and Medicine, University of California, San Francisco, California; Cardiovascular Research Institute, University of California, San Francisco, California; and
| | - Michael A Matthay
- Division of Pulmonary and Critical Care Medicine, Departments of Anesthesia and Medicine, University of California, San Francisco, California; Cardiovascular Research Institute, University of California, San Francisco, California; and
| | - Anil Sapru
- Division of Critical Care Medicine, Department of Pediatrics, School of Medicine, University of California, San Francisco, California; University of California, San Francisco, Benioff Children's Hospital, San Francisco, California
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Balaji S, Han N, Moles C, Shaaban AF, Bollyky PL, Crombleholme TM, Keswani SG. Angiopoietin-1 improves endothelial progenitor cell-dependent neovascularization in diabetic wounds. Surgery 2015; 158:846-56. [PMID: 26266763 DOI: 10.1016/j.surg.2015.06.034] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2015] [Revised: 06/22/2015] [Accepted: 06/27/2015] [Indexed: 02/07/2023]
Abstract
BACKGROUND The diabetic phenotype of wound healing is in part characterized by impaired neovascularization and deficient endothelial progenitor cell (EPC) recruitment. Angiopoietin-1 (Ang-1) is a potent mobilizer of EPCs from the bone marrow (BM). A suggested mechanism for EPC mobilization from the BM is mediated by matrix metalloproteinase 9 (MMP-9) and stem cell factor (SCF). Taken together, we hypothesized that overexpression of Ang-1 in diabetic wounds will recruit EPCs and improve neovascularization and wound healing. METHODS An endothelial lineage BM-labeled murine model of diabetes was developed to track BM-derived EPCs. FVBN mice were lethally irradiated and then reconstituted with BM from syngeneic Tie2/LacZ donor mice. Diabetes was induced with streptozotocin. Dorsal wounds in BM-transplanted mice were treated with Ad-Ang-1, Ad-GFP, or phosphate-buffered saline. At day 7 after injury, wounds were harvested and analyzed. A similar experiment was conducted in EPC mobilization deficient MMP-9 -/- mice to determine whether the effects of Ang-1 were EPC-dependent. RESULTS Overexpression of Ang-1 resulted in greatly improved re-epithelialization, neovascularization, and EPC recruitment in diabetic BM-transplanted wounds at day 7. Ang-1 treatment resulted in increased serum levels of proMMP-9 and SCF but had no effect on vascular endothelial growth factor levels. According to our FACS results, peripheral blood EPC (CD34(+)/Cd133(+)/Flk1(+)) counts at day 3 after wounding showed impaired EPC mobilization in MMP-9 -/- mice compared with those of wild-type controls. EPC mobilization was rescued by SCF administration, validating this model for EPC-mobilization-deficient mechanistic studies. In MMP-9 -/- mice, Ad-Ang-1 accelerated re-epithelialization in a similar manner, but had no effect on neovascularization. CONCLUSION Our results show that Ang-1 administration results in improved neovascularization which is dependent on EPC recruitment and has direct effects on wound re-epithelialization. These data may represent a novel strategy to correct the phenotype of impaired diabetic neovascularization and may improve diabetic wound healing.
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Affiliation(s)
- Swathi Balaji
- Laboratory for Regenerative Wound Healing, Division of Pediatric, General, Thoracic and Fetal Surgery, Cincinnati Children's Hospital Medical Center, Cincinnati, OH
| | - Nate Han
- Laboratory for Regenerative Wound Healing, Division of Pediatric, General, Thoracic and Fetal Surgery, Cincinnati Children's Hospital Medical Center, Cincinnati, OH
| | - Chad Moles
- Laboratory for Regenerative Wound Healing, Division of Pediatric, General, Thoracic and Fetal Surgery, Cincinnati Children's Hospital Medical Center, Cincinnati, OH
| | - Aimen F Shaaban
- Laboratory for Regenerative Wound Healing, Division of Pediatric, General, Thoracic and Fetal Surgery, Cincinnati Children's Hospital Medical Center, Cincinnati, OH
| | - Paul L Bollyky
- Division of Infectious Diseases, Department of Medicine, Stanford University School of Medicine, Stanford, CA
| | - Timothy M Crombleholme
- Laboratory for Regenerative Wound Healing, Division of Pediatric, General, Thoracic and Fetal Surgery, Cincinnati Children's Hospital Medical Center, Cincinnati, OH; Center for Children's Surgery, Children's Hospital Colorado and the University of Colorado School of Medicine, Aurora, CO
| | - Sundeep G Keswani
- Laboratory for Regenerative Wound Healing, Division of Pediatric, General, Thoracic and Fetal Surgery, Cincinnati Children's Hospital Medical Center, Cincinnati, OH.
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Delplace V, Payne S, Shoichet M. Delivery strategies for treatment of age-related ocular diseases: From a biological understanding to biomaterial solutions. J Control Release 2015; 219:652-668. [PMID: 26435454 DOI: 10.1016/j.jconrel.2015.09.065] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2015] [Revised: 09/28/2015] [Accepted: 09/29/2015] [Indexed: 12/24/2022]
Abstract
Age-related ocular diseases, such as age-related macular degeneration (AMD), diabetic retinopathy, and glaucoma, result in life-long functional deficits and enormous global health care costs. As the worldwide population ages, vision loss has become a major concern for both economic and human health reasons. Due to recent research into biomaterials and nanotechnology major advances have been gained in the field of ocular delivery. This review provides a summary and discussion of the most recent strategies employed for the delivery of both drugs and cells to the eye to treat a variety of age-related diseases. It emphasizes the current challenges and limitations to ocular delivery and how the use of innovative materials can overcome these issues and ultimately provide treatment for age-related degeneration and regeneration of lost tissues. This review also provides critical considerations and an outlook for future studies in the field of ophthalmic delivery.
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Affiliation(s)
- Vianney Delplace
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, 200 College Street, Toronto, ON M5S 3E5, Canada; Institute of Biomaterials and Biomedical Engineering, 164 College Street, Toronto, ON M5S 3G9, Canada
| | - Samantha Payne
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, 200 College Street, Toronto, ON M5S 3E5, Canada; Institute of Biomaterials and Biomedical Engineering, 164 College Street, Toronto, ON M5S 3G9, Canada
| | - Molly Shoichet
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, 200 College Street, Toronto, ON M5S 3E5, Canada; Institute of Biomaterials and Biomedical Engineering, 164 College Street, Toronto, ON M5S 3G9, Canada.
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65
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Xu Y, Zhang G, Kang Z, Xu Y, Jiang W, Zhang S. Cornin increases angiogenesis and improves functional recovery after stroke via the Ang1/Tie2 axis and the Wnt/β-catenin pathway. Arch Pharm Res 2015; 39:133-42. [DOI: 10.1007/s12272-015-0652-1] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2014] [Accepted: 08/11/2015] [Indexed: 11/28/2022]
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Arboleda-Velasquez JF, Valdez CN, Marko CK, D'Amore PA. From pathobiology to the targeting of pericytes for the treatment of diabetic retinopathy. Curr Diab Rep 2015; 15:573. [PMID: 25620405 PMCID: PMC5599150 DOI: 10.1007/s11892-014-0573-2] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Pericytes, the mural cells that constitute the capillaries along with endothelial cells, have been associated with the pathobiology of diabetic retinopathy; however, therapeutic implications of this association remain largely unexplored. Pericytes appear to be highly susceptible to the metabolic challenges associated with a diabetic environment, and there is substantial evidence that their loss may contribute to microvascular instability leading to the formation of microaneurysms, microhemorrhages, acellular capillaries, and capillary nonperfusion. Since pericytes are strategically located at the interface between the vascular and neural components of the retina, they offer extraordinary opportunities for therapeutic interventions in diabetic retinopathy. Moreover, the availability of novel imaging methodologies now allows for the in vivo visualization of pericytes, enabling a new generation of clinical trials that use pericyte tracking as clinical endpoints. The recognition of multiple signaling mechanisms involved in pericyte development and survival should allow for a renewed interest in pericytes as a therapeutic target for diabetic retinopathy.
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Affiliation(s)
- Joseph F Arboleda-Velasquez
- Schepens Eye Research Institute/Massachusetts Eye and Ear and the Department of Ophthalmology, Harvard Medical School, 20 Staniford Street, Boston, MA, 02114, USA
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Phosphodiesterase 4 inhibition dose dependently stabilizes microvascular barrier functions and microcirculation in a rodent model of polymicrobial sepsis. Shock 2015; 41:537-45. [PMID: 24569506 DOI: 10.1097/shk.0000000000000152] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
BACKGROUND Breakdown of microvascular endothelial barrier functions contributes to disturbed microcirculation, organ failure, and death in sepsis. Increased endothelial cAMP levels by systemic application of phosphodiesterase 4 inhibitors (PD-4-I) have previously been demonstrated to protect microvascular barrier properties in a model of systemic inflammation (systemic inflammatory response syndrome) suggesting a novel therapeutic option to overcome this problem. However, in a clinically relevant model of polymicrobial sepsis long-term effects, immunomodulatory effects and effectivity of PD-4-I to stabilize microvascular barrier functions and microcirculation remained unexplored. METHODS We induced polymicrobial sepsis using the colon ascendens stent peritonitis (CASP) model in which we performed macrohemodynamic and microhemodynamic monitoring with and without systemic intravenous application of different doses of PD-4-I rolipram in Sprague-Dawley rats over 26 h. RESULTS All animals with CASP showed clinical and laboratory signs of sepsis and peritonitis. Whereas macrohemodynamic adverse effects were not evident, application of PD-4-I led to stabilization of endothelial barrier properties as revealed by reduced extravasation of fluorescein isothiocyanate-albumin. However, only low-dose application of 1 mg/kg body weight per hour of PD-4-I improved microcirculatory flow in the CASP model, whereas high-dose therapy of 3 mg/kg BW per hour PDI-4-I had adverse effects. Accordingly, sepsis-induced acute kidney injury and lung edema were prevented by PD-4-I treatment. Furthermore, PD-4-I showed immunomodulatory effects as revealed by decreased interleukin 1α (IL-1α), IL-1β, IL-12, and tumor necrosis factor α levels following PD-4-I treatment, which appeared not to correlate with barrier-stabilizing effects of rolipram. CONCLUSIONS These data provide further evidence that systemic application of PD-4-I could be suitable for therapeutic microvascular barrier stabilization and improvement of microcirculatory flow in sepsis.
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Li X, Yuan S, Chen S, Luo R, Xiong K, Yang Z, Wang J, Huang N. Proliferation and functionality of human umbilical vein endothelial cells on angiopoietin-1 immobilized 316L stainless steel. J Mater Chem B 2015; 3:8717-8728. [DOI: 10.1039/c5tb01313e] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An angiopoietin-1 functionalized surface was establishedviapolydopamine coating and regulated HUVECs survival, proliferation and function.
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Affiliation(s)
- Xin Li
- Key Lab. of Advanced Technology for Materials of Education Ministry
- Southwest Jiaotong University
- Chengdu 610031
- China
- The Institute of Biomaterials and Surface Engineering
| | - Shuheng Yuan
- Key Lab. of Advanced Technology for Materials of Education Ministry
- Southwest Jiaotong University
- Chengdu 610031
- China
- The Institute of Biomaterials and Surface Engineering
| | - Si Chen
- Key Lab. of Advanced Technology for Materials of Education Ministry
- Southwest Jiaotong University
- Chengdu 610031
- China
- The Institute of Biomaterials and Surface Engineering
| | - Rifang Luo
- Key Lab. of Advanced Technology for Materials of Education Ministry
- Southwest Jiaotong University
- Chengdu 610031
- China
- The Institute of Biomaterials and Surface Engineering
| | - Kaiqin Xiong
- Key Lab. of Advanced Technology for Materials of Education Ministry
- Southwest Jiaotong University
- Chengdu 610031
- China
| | - Zhilu Yang
- Key Lab. of Advanced Technology for Materials of Education Ministry
- Southwest Jiaotong University
- Chengdu 610031
- China
| | - Jin Wang
- Key Lab. of Advanced Technology for Materials of Education Ministry
- Southwest Jiaotong University
- Chengdu 610031
- China
| | - Nan Huang
- Key Lab. of Advanced Technology for Materials of Education Ministry
- Southwest Jiaotong University
- Chengdu 610031
- China
- The Institute of Biomaterials and Surface Engineering
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Aguirre Palma LM, Gehrke I, Kreuzer KA. Angiogenic factors in chronic lymphocytic leukaemia (CLL): Where do we stand? Crit Rev Oncol Hematol 2014; 93:225-36. [PMID: 25459668 DOI: 10.1016/j.critrevonc.2014.10.007] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2014] [Revised: 07/23/2014] [Accepted: 10/01/2014] [Indexed: 01/09/2023] Open
Abstract
The role of angiogenesis in haematological malignancies such as chronic lymphocytic leukaemia (CLL) is difficult to envision, because leukaemia cells are not dependent on a network of blood vessels to support basic physiological requirements. Regardless, CLL cells secrete high levels of major angiogenic factors, such as vascular endothelial growth factor (VEGF), basic fibroblast growth factor (bFGF), and platelet derived growth factor (PDGF). Nonetheless, it remains unclear how most angiogenic factors regulate accumulation and delayed apoptosis of CLL cells. Angiogenic factors such as leptin, granulocyte colony-stimulating factor (G-CSF), follistatin, angiopoietin-1 (Ang1), angiogenin (ANG), midkine (MK), pleiotrophin (PTN), progranulin (PGRN), proliferin (PLF), placental growth factor (PIGF), and endothelial locus-1 (Del-1), represent novel therapeutic targets of future CLL research but have remained widely overlooked. This review aims to outline our current understanding of angiogenic growth factors and their relationship with CLL, a still uncured haematopoietic malignancy.
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Affiliation(s)
| | - Iris Gehrke
- Manitoba Institute of Cell Biology, University of Manitoba, Winnipeg, MB, Canada.
| | - Karl-Anton Kreuzer
- Department I of Internal Medicine, University of Cologne, Cologne, Germany.
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Molnar MZ, Kümpers P, Kielstein JT, Schiffer M, Czira ME, Ujszaszi A, Kovesdy CP, Mucsi I. Circulating Angiopoietin-2 levels predict mortality in kidney transplant recipients: a 4-year prospective case-cohort study. Transpl Int 2014; 27:541-52. [PMID: 24628855 DOI: 10.1111/tri.12293] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2013] [Revised: 10/31/2013] [Accepted: 02/24/2014] [Indexed: 12/16/2022]
Abstract
Angiopoietin 2 (Angpt2) impairs endothelial function by preventing angiopoietin 1 from binding to their common endothelial-specific receptor Tie2. Here, we examined whether circulating Angpt2 predicts outcome in kidney transplant recipients. For this case-cohort study, we selected 130 kidney transplant recipients who had died or returned to dialysis within the first 2 years of follow-up of our cohort study, as well as 130 age- and gender-matched kidney transplant recipients without an event (controls) from a total of 993 kidney transplant recipients. The total of 260 selected patients were followed in median 4 years. Serum Angpt2 at baseline was measured using an in-house immunoluminometric assay. Median Angpt2 concentrations were significantly higher in patients who died [median (interquartile range--IQR) 3.6 (2.8-5.9) ng/ml] as compared to patients who did not die during the study period [2.8 (2.1-4.1) ng/ml; P < 0.001]. Ln (natural log) Angpt2 levels correlated positively with C-reactive protein levels (r = 0.315, P < 0.001) and the Charlson Comorbidity Index (r = 0.188, P = 0.002) and were inversely associated with eGFR (r = -0.301, P < 0.001) hemoglobin (r = -0.269, P < 0.001), and serum albumin concentrations (r = -0.382, P < 0.001). On multivariate analyses, baseline Angpt2 levels independently predicted all-cause mortality (multivariable-adjusted hazard ratio associated with one natural log unit higher Angpt2 level: 1.70 (95% confidence interval: 1.10-2.61)). In our analysis, circulating Angpt2 was an independent predictor of all-cause mortality in stable, prevalent kidney transplant recipients.
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Affiliation(s)
- Miklos Z Molnar
- Harold Simmons Center for Kidney Disease Research and Epidemiology, Division of Nephrology and Hypertension, University of California Irvine Medical Center, Orange, CA, USA; Department of Medicine, Division of Nephrology, University Health Network, University of Toronto, Toronto, ON, Canada
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Chislock EM, Pendergast AM. Tie2 (to) Abl: Signaling to endothelial cell survival. Cell Cycle 2013; 12:3709-10. [PMID: 24145226 PMCID: PMC3905057 DOI: 10.4161/cc.26877] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Affiliation(s)
- Elizabeth M Chislock
- Department of Pharmacology and Cancer Biology; Duke University School of Medicine; Durham, NC USA
| | - Ann Marie Pendergast
- Department of Pharmacology and Cancer Biology; Duke University School of Medicine; Durham, NC USA
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Schlegel N, Waschke J. cAMP with other signaling cues converges on Rac1 to stabilize the endothelial barrier- a signaling pathway compromised in inflammation. Cell Tissue Res 2013; 355:587-96. [PMID: 24322391 DOI: 10.1007/s00441-013-1755-y] [Citation(s) in RCA: 70] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2013] [Accepted: 10/31/2013] [Indexed: 12/20/2022]
Abstract
cAMP is one of the most potent signaling molecules to stabilize the endothelial barrier, both under resting conditions as well as under challenge of barrier-destabilizing mediators. The two main signaling axes downstream of cAMP are activation of protein kinase A (PKA) as well as engagement of exchange protein directly activated by cAMP (Epac) and its effector GTPase Rap1. Interestingly, both pathways activate GTP exchange factors for Rac1, such as Tiam1 and Vav2 and stabilize the endothelial barrier via Rac1-mediated enforcement of adherens junctions and strengthening of the cortical actin cytoskeleton. On the level of Rac1, cAMP signaling converges with other barrier-enhancing signaling cues induced by sphingosine-1-phosphate (S1P) and angiopoietin-1 (Ang1) rendering Rac1 as an important signaling hub. Moreover, activation of Rap1 and inhibition of RhoA also contribute to barrier stabilization, emphasizing that regulation of small GTPases is a central mechanism in this context. The relevance of cAMP/Rac1-mediated barrier protection under pathophysiologic conditions can be concluded from data showing that inflammatory mediators causing multi-organ failure in systemic inflammation or sepsis interfere with this signaling axis on the level of cAMP or Rac1. This is in line with the well-known efficacy of cAMP to abrogate the barrier breakdown in response to most barrier-compromising stimuli. New is the notion that the tight endothelial barrier under resting conditions is maintained by (1) continuous cAMP formation induced by hormones such as epinephrine or (2) by activation of Rac1 downstream of S1P that is secreted by erythrocytes and activated platelets.
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Affiliation(s)
- Nicolas Schlegel
- Department of General-, Visceral, Vascular and Pediatric surgery, University Hospital Wuerzburg, Oberduerrbacherstrasse 6, 97080, Wuerzburg, Germany
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Boyer DS, Hopkins JJ, Sorof J, Ehrlich JS. Anti-vascular endothelial growth factor therapy for diabetic macular edema. Ther Adv Endocrinol Metab 2013; 4:151-69. [PMID: 24324855 PMCID: PMC3855829 DOI: 10.1177/2042018813512360] [Citation(s) in RCA: 134] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Diabetes mellitus is a serious health problem that affects over 350 million individuals worldwide. Diabetic retinopathy (DR), which is the most common microvascular complication of diabetes, is the leading cause of new cases of blindness in working-aged adults. Diabetic macular edema (DME) is an advanced, vision-limiting complication of DR that affects nearly 30% of patients who have had diabetes for at least 20 years and is responsible for much of the vision loss due to DR. The historic standard of care for DME has been macular laser photocoagulation, which has been shown to stabilize vision and reduce the rate of further vision loss by 50%; however, macular laser leads to significant vision recovery in only 15% of treated patients. Mechanisms contributing to the microvascular damage in DR and DME include the direct toxic effects of hyperglycemia, sustained alterations in cell signaling pathways, and chronic microvascular inflammation with leukocyte-mediated injury. Chronic retinal microvascular damage results in elevation of intraocular levels of vascular endothelial growth factor A (VEGF), a potent, diffusible, endothelial-specific mitogen that mediates many important physiologic processes, including but not limited to the development and permeability of the vasculature. The identification of VEGF as an important pathophysiologic mediator of DME suggested that anti-VEGF therapy delivered to the eye might lead to improved visual outcomes in this disease. To date, four different inhibitors of VEGF, each administered by intraocular injection, have been tested in prospective, randomized phase II or phase III clinical trials in patients with DME. The results from these trials demonstrate that treatment with anti-VEGF agents results in substantially improved visual and anatomic outcomes compared with laser photocoagulation, and avoid the ocular side effects associated with laser treatment. Thus, anti-VEGF therapy has become the preferred treatment option for the management of DME in many patients.
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Affiliation(s)
- David S Boyer
- Retina Vitreous Associates Medical Group, 1127 Wilshire Boulevard, Suite 1620, Los Angeles, CA 90017, USA
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Castelli C, Tazzari M, Negri T, Vergani B, Rivoltini L, Stacchiotti S, Pilotti S. Structured myeloid cells and anti-angiogenic therapy in alveolar soft part sarcoma. J Transl Med 2013; 11:237. [PMID: 24074204 PMCID: PMC3856484 DOI: 10.1186/1479-5876-11-237] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2013] [Accepted: 09/24/2013] [Indexed: 11/30/2022] Open
Abstract
Alveolar soft part sarcoma (ASPS) is a rare soft tissue sarcoma and the clinical management of patients with unresectable, metastatic disease is still challenging. ASPS expresses an array of potentially therapeutically targetable, angiogenesis-related molecules and, importantly, it has a distinctive angiogenic phenotype marked by a peculiar tumor-associated vasculature. Several studies, conducted in transgenic mouse models and in a large variety of human tumors of different histotype, clearly proved the substantial contribution of tumor-infiltrating myeloid cells, such as myeloid derived suppressor cells, monocytes and macrophages, in the formation and maintenance of abnormal blood vessels in tumors. By immunohistochemistry we thus explored the presence and the distribution of cells expressing myeloid markers in the inflammatory infiltrate of surgical treated metastatic ASPS. Indeed, we found that myeloid cells expressing CD14 and CD163 markers constitute the prominent cells in the inflammatory infiltrate of ASPS. These macrophage-like cells form a network surrounding the endothelial cells, or, interspersed in the tumor nest, they keep deep contact with tumor cells. In this commentary, we discussed our findings in relation to the recently published paper by Kummar and colleagues reporting the clinical and molecular results of a phase II clinical trial in patients with unresectable, metastatic ASPS treated with the anti-angiogenic drug cediranib, targeting the VEGFR-1,-2,-3 tyrosine kinases.
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Affiliation(s)
- Chiara Castelli
- Unit of Immunotherapy of Human Tumors, Fondazione IRCCS Istituto Nazionale dei Tumori, Via G, Venezian 1, Milan 20133, Italy.
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