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Wu S, Huang J, Li Y. A novel hypoxic lncRNA, LOC110520012 sponges miR-206-y to regulate angiogenesis and liver cell proliferation in rainbow trout (Oncorhynchus mykiss) by targeting vegfaa. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2024; 280:116554. [PMID: 38878335 DOI: 10.1016/j.ecoenv.2024.116554] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2024] [Revised: 05/28/2024] [Accepted: 06/04/2024] [Indexed: 06/25/2024]
Abstract
Long non-coding RNA (lncRNA) is a novel emerging type of competitive endogenous RNA (ceRNA) that performs key functions in multiple biological processes. However, little is known about the roles of lncRNA under hypoxia stress in fish. Here, vascular endothelial growth factor-Aa (vegfaa) was cloned in rainbow trout (Oncorhynchus mykiss), with the complete cDNA sequence of 2914 bp, encoding 218 amino acids. The molecular weight of the protein was approximately 25.33 kDa, and contained PDGF and VEGF_C domains. Time-course and spatial expression patterns revealed that LOC110520012 was a key regulator of rainbow trout in response to hypoxia stress, and LOC110520012, miR-206-y and vegfaa exhibited a ceRNA regulatory relationship in liver, gill, muscle and rainbow trout liver cells treated with acute hypoxia. Subsequently, the targeting relationship of LOC110520012 and vegfaa with miR-206-y was confirmed by dual-luciferase reporter analysis, and overexpression of LOC110520012 mediated the inhibition of miR-206-y expression in rainbow trout liver cells, while the opposite results were obtained after LOC110520012 silencing with siRNA. We also proved that vegfaa was a target of miR-206-y in vitro and in vivo, and the vegfaa expression and anti-proliferative effect on rainbow trout liver cells regulated by miR-206-y mimics could be reversed by LOC110520012. These results suggested that LOC110520012 can positively regulate vegfaa expression by sponging miR-206-y under hypoxia stress in rainbow trout, which facilitate in-depth understanding of the molecular mechanisms of fish adaptation and tolerance to hypoxia.
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Affiliation(s)
- Shenji Wu
- College of Animal Science and Technology, Gansu Agricultural University, Lanzhou 730070, China
| | - Jinqiang Huang
- College of Animal Science and Technology, Gansu Agricultural University, Lanzhou 730070, China.
| | - Yongjuan Li
- College of Animal Science and Technology, Gansu Agricultural University, Lanzhou 730070, China; College of Science, Gansu Agricultural University, Lanzhou 730070, China
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Al-Gizawiy MM, Wujek RT, Alhajala HS, Cobb JM, Prah MA, Doan NB, Connelly JM, Chitambar CR, Schmainda KM. Potent in vivo efficacy of oral gallium maltolate in treatment-resistant glioblastoma. Front Oncol 2024; 13:1278157. [PMID: 38288102 PMCID: PMC10822938 DOI: 10.3389/fonc.2023.1278157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2023] [Accepted: 12/26/2023] [Indexed: 01/31/2024] Open
Abstract
Background Treatment-resistant glioblastoma (trGBM) is an aggressive brain tumor with a dismal prognosis, underscoring the need for better treatment options. Emerging data indicate that trGBM iron metabolism is an attractive therapeutic target. The novel iron mimetic, gallium maltolate (GaM), inhibits mitochondrial function via iron-dependent and -independent pathways. Methods In vitro irradiated adult GBM U-87 MG cells were tested for cell viability and allowed to reach confluence prior to stereotactic implantation into the right striatum of male and female athymic rats. Advanced MRI at 9.4T was carried out weekly starting two weeks after implantation. Daily oral GaM (50mg/kg) or vehicle were provided on tumor confirmation. Longitudinal MRI parameters were processed for enhancing tumor ROIs in OsiriX 8.5.1 (lite) with Imaging Biometrics Software (Imaging Biometrics LLC). Statistical analyses included Cox proportional hazards regression models, Kaplan-Meier survival plots, linear mixed model comparisons, and t-statistic for slopes comparison as indicator of tumor growth rate. Results In this study we demonstrate non-invasively, using longitudinal MRI surveillance, the potent antineoplastic effects of GaM in a novel rat xenograft model of trGBM, as evidenced by extended suppression of tumor growth (23.56 mm3/week untreated, 5.76 mm3/week treated, P < 0.001), a blunting of tumor perfusion, and a significant survival benefit (median overall survival: 30 days untreated, 56 days treated; P < 0.001). The therapeutic effect was confirmed histologically by the presence of abundant cytotoxic cellular swelling, a significant reduction in proliferation markers (P < 0.01), and vessel normalization characterized by prominent vessel pruning, loss of branching, and uniformity of vessel lumina. Xenograft tumors in the treatment group were further characterized by an absence of an invasive edge and a significant reduction in both, MIB-1% and mitotic index (P < 0.01 each). Transferrin receptor and ferroportin expression in GaM-treated tumors illustrated cellular iron deprivation. Additionally, treatment with GaM decreased the expression of pro-angiogenic markers (von Willebrand Factor and VEGF) and increased the expression of anti-angiogenic markers, such as Angiopoietin-2. Conclusion Monotherapy with the iron-mimetic GaM profoundly inhibits trGBM growth and significantly extends disease-specific survival in vivo.
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Affiliation(s)
- Mona M. Al-Gizawiy
- Department of Biophysics, Medical College of Wisconsin, Milwaukee, WI, United States
| | - Robert T. Wujek
- Department of Biomedical Engineering, Medical College of Wisconsin, Milwaukee, WI, United States
| | - Hisham S. Alhajala
- Department of Medicine, Medical College of Wisconsin, Milwaukee, WI, United States
| | - Jonathan M. Cobb
- Department of Biophysics, Medical College of Wisconsin, Milwaukee, WI, United States
| | - Melissa A. Prah
- Department of Biophysics, Medical College of Wisconsin, Milwaukee, WI, United States
| | - Ninh B. Doan
- Department of Neurosurgery, Medical College of Wisconsin, Milwaukee, WI, United States
| | - Jennifer M. Connelly
- Department of Neurology, Medical College of Wisconsin, Milwaukee, WI, United States
| | - Christopher R. Chitambar
- Department of Biophysics, Medical College of Wisconsin, Milwaukee, WI, United States
- Department of Medicine, Medical College of Wisconsin, Milwaukee, WI, United States
| | - Kathleen M. Schmainda
- Department of Biophysics, Medical College of Wisconsin, Milwaukee, WI, United States
- Department of Radiology, Medical College of Wisconsin, Milwaukee, WI, United States
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Wiegand C, Dirksen A, Tittelbach J. Treatment with a red-laser-based wound therapy device exerts positive effects in models of delayed keratinocyte and fibroblast wound healing. PHOTODERMATOLOGY, PHOTOIMMUNOLOGY & PHOTOMEDICINE 2024; 40:e12926. [PMID: 37957888 DOI: 10.1111/phpp.12926] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Revised: 09/21/2023] [Accepted: 10/31/2023] [Indexed: 11/15/2023]
Abstract
BACKGROUND Light therapy is widely used in medicine. Specifically, photobiomodulation has been shown to exert beneficial effects in wound healing disorders, which present a major challenge in health care. The study's aim was providing information on the effect of a novel, red-laser-based wound therapy device (WTD) on keratinocytes and fibroblasts during wound healing under optimal and non-optimal conditions. METHODS The scratch wound assay was employed as a wound healing model for mechanical damage with readjustment of specific cell milieus, explicitly chronic TH1 inflammation and TH2-dominant conditions. Furthermore, gene expression analysis of pro-inflammatory cytokines (IL1A, IL6, CXCL8), growth factors (TGFB1, PDGFC), transcription factors (NFKB1, TP53) and heat shock proteins (HSP90AA1, HSPA1A, HSPD1) as well as desmogleins (DSG1, DSG3) in keratinocytes and collagen (COL1A1, COL3A1) in fibroblasts was performed after WTD treatment. RESULTS It was shown that WTD treatment is biocompatible and supports scratch wound closure under non-optimal conditions. A distinct enhancement of desmoglein and collagen gene expression as well as induction of early growth factor gene expression was observed under chronic inflammatory conditions. Moreover, WTD increased HSPD1 transcript levels in keratinocytes and augmented collagen expression in fibroblasts during wound healing under TH2 conditions. WTD treatment also alleviated the inflammatory response in keratinocytes and induced early growth factor gene expression in fibroblasts under physiological conditions. CONCLUSION Positive effects described for wound treatment with WTD could be replicated in vitro and seem to be to be conferred by a direct influence on cellular processes taking place in keratinocytes and fibroblasts during wound healing.
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Affiliation(s)
- Cornelia Wiegand
- Department of Dermatology, Jena University Hospital, Friedrich Schiller University, Jena, Germany
| | | | - Jörg Tittelbach
- Department of Dermatology, Jena University Hospital, Friedrich Schiller University, Jena, Germany
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Yoon E, Jeong J, Yoon E, Park D. The effects of treadmill exercise on brain angiogenesis in ovariectomized rats. Physiol Rep 2023; 11:10.14814/phy2.15864. [PMID: 37962017 PMCID: PMC10644280 DOI: 10.14814/phy2.15864] [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: 08/04/2023] [Revised: 10/24/2023] [Accepted: 10/25/2023] [Indexed: 11/15/2023] Open
Abstract
Menopause is associated with vascular dysfunction attributed to reduced estrogen levels. Exercise has been proposed to promote angiogenesis and vascular dysfunction. However, studies of brain angiogenesis during menopause are limited. We analyzed the effects of exercise on angiogenesis-related factors in menopausal rat model. Twenty-week-old female Sprague-Dawley rats (N = 18) were randomly divided into a normal control group (N, n = 6), an ovariectomized control group (OVX, n = 6), and an ovariectomy + exercise group (OVX-EX, n = 6). Treadmill exercises were conducted in the OVX-EX group for 8 weeks (15-60 m/min, 1 h/day, and 5 days/week). The current study showed that the expression of angiogenesis-related factors (platelet-derived growth factor subunit A, B, vascular endothelial growth factor, angiopoietin 1, and angiopoietin 2) significantly decreased in the cortex of the OVX group. However, these factors were significantly restored in the cortex of the OVX-EX group after 8 weeks of treadmill exercise. In summary, estrogen deficiency causes vascular dysfunction by inhibiting the expression of angiogenesis-related factors. However, exercise can restore angiogenesis-related factors in OVX rats. Exercise eventually prevents vascular dysfunction in the brain and may help prevent cognitive dysfunction in menopausal women.
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Affiliation(s)
- Eun‐Jung Yoon
- Laboratory of Animal Physiology and Medicine, Department of Biology EducationKorea National University of EducationCheongjuKorea
| | - Jiwon Jeong
- Laboratory of Animal Physiology and Medicine, Department of Biology EducationKorea National University of EducationCheongjuKorea
| | - Eunji Yoon
- Laboratory of Animal Physiology and Medicine, Department of Biology EducationKorea National University of EducationCheongjuKorea
| | - Dongsun Park
- Laboratory of Animal Physiology and Medicine, Department of Biology EducationKorea National University of EducationCheongjuKorea
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Missiaen R, Lesner NP, Simon MC. HIF: a master regulator of nutrient availability and metabolic cross-talk in the tumor microenvironment. EMBO J 2023; 42:e112067. [PMID: 36808622 PMCID: PMC10015374 DOI: 10.15252/embj.2022112067] [Citation(s) in RCA: 15] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Revised: 12/13/2022] [Accepted: 12/16/2022] [Indexed: 02/22/2023] Open
Abstract
A role for hypoxia-inducible factors (HIFs) in hypoxia-dependent regulation of tumor cell metabolism has been thoroughly investigated and covered in reviews. However, there is limited information available regarding HIF-dependent regulation of nutrient fates in tumor and stromal cells. Tumor and stromal cells may generate nutrients necessary for function (metabolic symbiosis) or deplete nutrients resulting in possible competition between tumor cells and immune cells, a result of altered nutrient fates. HIF and nutrients in the tumor microenvironment (TME) affect stromal and immune cell metabolism in addition to intrinsic tumor cell metabolism. HIF-dependent metabolic regulation will inevitably result in the accumulation or depletion of essential metabolites in the TME. In response, various cell types in the TME will respond to these hypoxia-dependent alterations by activating HIF-dependent transcription to alter nutrient import, export, and utilization. In recent years, the concept of metabolic competition has been proposed for critical substrates, including glucose, lactate, glutamine, arginine, and tryptophan. In this review, we discuss how HIF-mediated mechanisms control nutrient sensing and availability in the TME, the competition for nutrients, and the metabolic cross-talk between tumor and stromal cells.
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Affiliation(s)
- Rindert Missiaen
- Abramson Family Cancer Research Institute, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
- Department of Cell and Developmental Biology, University of Pennsylvania, Philadelphia, PA, USA
| | - Nicholas P Lesner
- Abramson Family Cancer Research Institute, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
- Department of Cell and Developmental Biology, University of Pennsylvania, Philadelphia, PA, USA
| | - M Celeste Simon
- Abramson Family Cancer Research Institute, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
- Department of Cell and Developmental Biology, University of Pennsylvania, Philadelphia, PA, USA
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Turek-Jakubowska A, Dębski J, Jakubowski M, Szahidewicz-Krupska E, Gawryś J, Gawryś K, Janus A, Trocha M, Doroszko A. New Candidates for Biomarkers and Drug Targets of Ischemic Stroke-A First Dynamic LC-MS Human Serum Proteomic Study. J Clin Med 2022; 11:jcm11020339. [PMID: 35054033 PMCID: PMC8780942 DOI: 10.3390/jcm11020339] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Revised: 01/06/2022] [Accepted: 01/10/2022] [Indexed: 01/27/2023] Open
Abstract
(1) Background: The aim of this dynamic-LC/MS-human-serum-proteomic-study was to identify potential proteins-candidates for biomarkers of acute ischemic stroke, their changes during acute phase of stroke and to define potential novel drug-targets. (2) Methods: A total of 32 patients (29–80 years) with acute ischemic stroke were enrolled to the study. The control group constituted 29 demographically-matched volunteers. Subjects with stroke presented clinical symptoms lasting no longer than 24 h, confirmed by neurological-examination and/or new cerebral ischemia visualized in the CT scans (computed tomography). The analysis of plasma proteome was performed using LC-MS (liquid chromatography–mass spectrometry). (3) Results: Ten proteins with significantly different serum concentrations between groups volunteers were: complement-factor-B, apolipoprotein-A-I, fibronectin, alpha-2-HS-glycoprotein, alpha-1B-glycoprotein, heat-shock-cognate-71kDa protein/heat-shock-related-70kDa-protein-2, thymidine phosphorylase-2, cytoplasmic-tryptophan-tRNA-ligase, ficolin-2, beta-Ala-His-dipeptidase. (4) Conclusions: This is the first dynamic LC-MS study performed on a clinical model which differentiates serum proteome of patients in acute phase of ischemic stroke in time series and compares to control group. Listed proteins should be considered as risk factors, markers of ischemic stroke or potential therapeutic targets. Further clinical validation might define their exact role in differential diagnostics, monitoring the course of the ischemic stroke or specifying them as novel drug targets.
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Affiliation(s)
| | - Janusz Dębski
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Pawińskiego 5a, 02-106 Warszawa, Poland;
| | - Maciej Jakubowski
- Lower Silesian Centre for Lung Diseases, Grabiszyńska 105, 53-439 Wroclaw, Poland;
| | - Ewa Szahidewicz-Krupska
- Department of Internal Medicine, Hypertension and Clinical Oncology, Wroclaw Medical University, Borowska 213, 50-556 Wroclaw, Poland; (E.S.-K.); (J.G.); (A.J.)
| | - Jakub Gawryś
- Department of Internal Medicine, Hypertension and Clinical Oncology, Wroclaw Medical University, Borowska 213, 50-556 Wroclaw, Poland; (E.S.-K.); (J.G.); (A.J.)
| | - Karolina Gawryś
- Department of Neurology, 4th Military Hospital, Weigla 5, 50-556 Wroclaw, Poland; (A.T.-J.); (K.G.)
| | - Agnieszka Janus
- Department of Internal Medicine, Hypertension and Clinical Oncology, Wroclaw Medical University, Borowska 213, 50-556 Wroclaw, Poland; (E.S.-K.); (J.G.); (A.J.)
| | - Małgorzata Trocha
- Department of Pharmacology, Faculty of Medicine, Wroclaw Medical University, Mikulicz-Radecki 2, 50-349 Wroclaw, Poland;
| | - Adrian Doroszko
- Department of Internal Medicine, Hypertension and Clinical Oncology, Wroclaw Medical University, Borowska 213, 50-556 Wroclaw, Poland; (E.S.-K.); (J.G.); (A.J.)
- Correspondence: ; Tel.: +48-71-736-4000
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Rios-Colon L, Kumar P, Kim S, Sharma M, Su Y, Kumar A, Singh S, Stocks N, Liu L, Joshi M, Schlaepfer IR, Kumar D, Deep G. Carnitine Palmitoyltransferase 1 Regulates Prostate Cancer Growth under Hypoxia. Cancers (Basel) 2021; 13:cancers13246302. [PMID: 34944922 PMCID: PMC8699124 DOI: 10.3390/cancers13246302] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Accepted: 12/07/2021] [Indexed: 12/19/2022] Open
Abstract
Simple Summary Cancer cell survival in hypoxia areas, with low oxygen and food supply as well as abundant waste material, is critical to their aggressiveness and associated with disease relapse and mortality. Therefore, it is vital to understand the molecular regulators of cancer cell survival under these harsh physiological conditions. In the present study, we assessed the role of a mitochondrial protein carnitine palmitoyltransferase (CPT1A) in regulating prostate cancer (PCa) cell survival and proliferation under hypoxic conditions in both cell culture and animal models. The results showed that CPT1A expression in PCa cells is key to their survival and proliferation in the hypoxic tumor microenvironment. These results have high translational significance in improving cancer prognosis and therapy. Abstract Hypoxia and hypoxia-related biomarkers are the major determinants of prostate cancer (PCa) aggressiveness. Therefore, a better understanding of molecular players involved in PCa cell survival under hypoxia could offer novel therapeutic targets. We previously reported a central role of mitochondrial protein carnitine palmitoyltransferase (CPT1A) in PCa progression, but its role in regulating PCa survival under hypoxia remains unknown. Here, we employed PCa cells (22Rv1 and MDA-PCa-2b) with knockdown or overexpression of CPT1A and assessed their survival under hypoxia, both in cell culture and in vivo models. The results showed that CPT1A knockdown in PCa cells significantly reduced their viability, clonogenicity, and sphere formation under hypoxia, while its overexpression increased their proliferation, clonogenicity, and sphere formation. In nude mice, 22Rv1 xenografts with CPT1A knockdown grew significantly slower compared to vector control cells (~59% reduction in tumor volume at day 29). On the contrary, CPT1A-overexpressing 22Rv1 xenografts showed higher tumor growth compared to vector control cells (~58% higher tumor volume at day 40). Pathological analyses revealed lesser necrotic areas in CPT1A knockdown tumors and higher necrotic areas in CPT1A overexpressing tumors. Immunofluorescence analysis of tumors showed that CPT1A knockdown strongly compromised the hypoxic areas (pimonidazole+), while CPT1A overexpression resulted in more hypoxia areas with strong expression of proliferation biomarkers (Ki67 and cyclin D1). Finally, IHC analysis of tumors revealed a significant decrease in VEGF or VEGF-D expression but without significant changes in biomarkers associated with microvessel density. These results suggest that CPT1A regulates PCa survival in hypoxic conditions and might contribute to their aggressiveness.
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Affiliation(s)
- Leslimar Rios-Colon
- Department of Cancer Biology, Wake Forest Baptist Medical Center, Winston-Salem, NC 27157, USA; (L.R.-C.); (P.K.); (S.K.); (M.S.); (Y.S.); (A.K.); (S.S.); (N.S.); (L.L.)
- Julius L. Chambers Biomedical Biotechnology Research Institute, North Carolina Central University, Durham, NC 27707, USA;
| | - Pawan Kumar
- Department of Cancer Biology, Wake Forest Baptist Medical Center, Winston-Salem, NC 27157, USA; (L.R.-C.); (P.K.); (S.K.); (M.S.); (Y.S.); (A.K.); (S.S.); (N.S.); (L.L.)
- Division of Pathology, ICAR—Indian Veterinary Research Institute, Izatnagar 243122, India
| | - Susy Kim
- Department of Cancer Biology, Wake Forest Baptist Medical Center, Winston-Salem, NC 27157, USA; (L.R.-C.); (P.K.); (S.K.); (M.S.); (Y.S.); (A.K.); (S.S.); (N.S.); (L.L.)
| | - Mitu Sharma
- Department of Cancer Biology, Wake Forest Baptist Medical Center, Winston-Salem, NC 27157, USA; (L.R.-C.); (P.K.); (S.K.); (M.S.); (Y.S.); (A.K.); (S.S.); (N.S.); (L.L.)
| | - Yixin Su
- Department of Cancer Biology, Wake Forest Baptist Medical Center, Winston-Salem, NC 27157, USA; (L.R.-C.); (P.K.); (S.K.); (M.S.); (Y.S.); (A.K.); (S.S.); (N.S.); (L.L.)
| | - Ashish Kumar
- Department of Cancer Biology, Wake Forest Baptist Medical Center, Winston-Salem, NC 27157, USA; (L.R.-C.); (P.K.); (S.K.); (M.S.); (Y.S.); (A.K.); (S.S.); (N.S.); (L.L.)
| | - Sangeeta Singh
- Department of Cancer Biology, Wake Forest Baptist Medical Center, Winston-Salem, NC 27157, USA; (L.R.-C.); (P.K.); (S.K.); (M.S.); (Y.S.); (A.K.); (S.S.); (N.S.); (L.L.)
| | - Nalexus Stocks
- Department of Cancer Biology, Wake Forest Baptist Medical Center, Winston-Salem, NC 27157, USA; (L.R.-C.); (P.K.); (S.K.); (M.S.); (Y.S.); (A.K.); (S.S.); (N.S.); (L.L.)
| | - Liang Liu
- Department of Cancer Biology, Wake Forest Baptist Medical Center, Winston-Salem, NC 27157, USA; (L.R.-C.); (P.K.); (S.K.); (M.S.); (Y.S.); (A.K.); (S.S.); (N.S.); (L.L.)
- Center for Cancer Genomics and Precision Oncology, Wake Forest Baptist Medical Center, Winston-Salem, NC 27157, USA
- Wake Forest Baptist Comprehensive Cancer Center, Wake Forest Baptist Medical Center, Winston-Salem, NC 27157, USA
| | - Molishree Joshi
- Functional Genomics Facility, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA;
| | - Isabel R. Schlaepfer
- Division of Medical Oncology, University of Colorado Anschutz Medical Center, Aurora, CO 80045, USA;
| | - Deepak Kumar
- Julius L. Chambers Biomedical Biotechnology Research Institute, North Carolina Central University, Durham, NC 27707, USA;
| | - Gagan Deep
- Department of Cancer Biology, Wake Forest Baptist Medical Center, Winston-Salem, NC 27157, USA; (L.R.-C.); (P.K.); (S.K.); (M.S.); (Y.S.); (A.K.); (S.S.); (N.S.); (L.L.)
- Wake Forest Baptist Comprehensive Cancer Center, Wake Forest Baptist Medical Center, Winston-Salem, NC 27157, USA
- Correspondence: ; Tel.: +336-716-9363
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Kaur D, Behl T, Chigurupati S, Sehgal A, Singh S, Sharma N, Badavath VN, Vargas-De-La-Cruz C, Bhatia S, Al-Harrasi A, Dey A, Aleya L, Bungau S. Deciphering the focal role of endostatin in Alzheimer's disease. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:61998-62011. [PMID: 34561808 DOI: 10.1007/s11356-021-16567-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Accepted: 09/12/2021] [Indexed: 06/13/2023]
Abstract
Alzheimer's disease (AD) is a paramount chronic neurodegenerative condition that has been affecting elderly people since the 1900s. It causes memory loss, disorientation, and poor mental function. AD is considered to be one of the most serious problems that dementia sufferers face. Despite extensive investigation, the pathological origin of Alzheimer's disease remains a mystery. The amyloid cascade theory and the vascular hypothesis, which stresses the buildup of Aβ plaques, have dominated research into dementia and aging throughout history. However, research into this task failed to yield the long-awaited therapeutic miracle lead for Alzheimer's disease. Perhaps a hypothetical fragility in the context of Alzheimer's disease was regarded as a state distinct from aging in general, as suggested by the angiogenesis hypothesis, which suggests that old age is one state associated with upregulation of angiogenic growth factors, resulting in decreased microcirculation throughout the body. There has also been evidence that by controlling or inhibiting the components involved in the sequence of events that cause angiogenesis, there is a visible progression in AD patients. In Alzheimer's disease, one such antiangiogenic drug is being used.
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Affiliation(s)
- Dapinder Kaur
- Chitkara College of Pharmacy, Chitkara University, Chandigarh, Punjab, India
| | - Tapan Behl
- Chitkara College of Pharmacy, Chitkara University, Chandigarh, Punjab, India.
| | - Sridevi Chigurupati
- Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, Qassim University, Buraidah, Saudi Arabia
| | - Aayush Sehgal
- Chitkara College of Pharmacy, Chitkara University, Chandigarh, Punjab, India
| | - Sukhbir Singh
- Chitkara College of Pharmacy, Chitkara University, Chandigarh, Punjab, India
| | - Neelam Sharma
- Chitkara College of Pharmacy, Chitkara University, Chandigarh, Punjab, India
| | | | - Celia Vargas-De-La-Cruz
- Faculty of Pharmacy and Biochemistry, Academic Department of Pharmacology, Bromatology and Toxicology, Centro Latinoamericano de Ensenanza e Investigacion en Bacteriologia Alimentaria, Universidad Nacinol Mayor de San Marcos, Lima, Peru
- E-Health Research Center, Universidad de Ciencias y Humanidades, Lima, Peru
| | - Saurabh Bhatia
- Natural & Medical Sciences Research Centre, University of Nizwa, Nizwa, Oman
- School of Health Science, University of Petroleum and Energy Studies, Dehradun, Uttarakhand, India
| | - Ahmed Al-Harrasi
- Natural & Medical Sciences Research Centre, University of Nizwa, Nizwa, Oman
| | - Abhijit Dey
- Department of Life Sciences, Presidency University, Kolkata, India
| | - Lotfi Aleya
- Chrono-Environment Laboratory, UMR CNRS 6249, Bourgogne Franche-Comté University, Besançon, France
| | - Simona Bungau
- Department of Pharmacy, Faculty of Pharmacy, University of Oradea, Oradea, Romania
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Circ_0068655 Promotes Cardiomyocyte Apoptosis via miR-498/PAWR Axis. Tissue Eng Regen Med 2020; 17:659-670. [PMID: 32767028 DOI: 10.1007/s13770-020-00270-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Revised: 04/29/2020] [Accepted: 05/02/2020] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND The cardiomyocyte apoptosis is considered as one of major contributions to cardiac remodeling after myocardial infarction (MI). Numerous studies find that circular RNAs (circRNAs) play pivotal roles in a variety of biological functions. However, the role of circ_0068655 in MI and human induced pluripotent stem-derived cardiomyocytes (HCMs) remains unknown. METHODS The expression of circ_0068655, miR-498, and PRKC apoptosis WT1 regulator (PAWR) in human MI heart tissues and hypoxia subjected HCMs was evaluated with qRT-PCR and Western blot. The effects of circ_0068655 on hypoxia-induced apoptotic death and cell migration in HCMs were evaluated with qRT-PCR, cell viability, cell death ELISA (POD), and Caspase-3 activity assay, and Trans-well assay, respectively. Furthermore, luciferase assay, qRT-PCR, biotin-labeled miRNA pulldown assay, and Western blot were employed in the functional studies. RESULTS We found that the expression of circ_0068655 and PAWR was enhanced in MI patients and hypoxia subjected HCMs; by contrast, the expression of miR-498 decreased. Inhibited expression of circ_0068655 in HMCs counteracted hypoxia-induced apoptotic death and impaired cell migration, in sharp contrast to circ_0068655 knockdown. We identified that circ_0068655 sponged an endogenous miR-498 to sequester and inhibit its activity, leading to the increased PAWR expression. CONCLUSIONS Our findings reveal that the expression of circ_0068655 can promote cardiomyocyte apoptosis through the modulation of miR-498-PAWR axis in vitro, which highlights the diagnostic and therapeutic value of circ_0068655 in patients with MI.
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Li QF, Wang H, Zheng L, Yang F, Li HZ, Li JX, Cheng D, Lu K, Liu Y. Effects of Modest Hypoxia and Exercise on Cardiac Function, Sleep-Activity, Negative Geotaxis Behavior of Aged Female Drosophila. Front Physiol 2020; 10:1610. [PMID: 32038290 PMCID: PMC6985434 DOI: 10.3389/fphys.2019.01610] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2019] [Accepted: 12/23/2019] [Indexed: 12/13/2022] Open
Abstract
Mild normobaric hypoxia (NH) and modest exercise have multiple beneficial effects on health, but the changes in physiological function induced by NH and/or exercise remain unclear. The purpose of this investigation was to examine the specific effects of NH and/or exercise on cardiac function and myocardial structure and behavior including sleep-activity and negative geotaxis in aged Drosophila. We also assessed the survival rate of flies after hypoxia and/or exercise. One-thousand wild-type w1118 virgin female flies were randomly divided into four groups and treated with NH and/or exercise from ages 3-6 weeks. We found that exercise remarkably delayed the decline of actin and myosin and the age-related changes in cardiac structure, improved abnormal cardiac contraction, and enhanced the cardiac pumping force by inducing cardiac hypertrophy and delaying deterioration of cardiac contractility and diastolic compliance, and improved abnormal heart contraction. NH also increased the content of actin and myosin, but induced a decrease in heart diameter and heart rate, as well as an increase in the number of mitochondria and deeper sleep, which may be the manifestation of energy saving under long-term hypoxia. Both NH and exercise improved sleep quality and climbing ability of aged flies, as well as extended the maximum life span, which shows the benefits of hypoxia and exercise. Finally, the superposition of NH and exercise did not impart any obvious physiological and behavior improvement. Therefore, it is necessary to further explore the appropriate combination of hypoxia and exercise.
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Affiliation(s)
- Qiu Fang Li
- Key Laboratory of Physical Fitness and Exercise Rehabilitation of Hunan Province, Hunan Normal University, Changsha, China
| | - Hui Wang
- Key Laboratory of Physical Fitness and Exercise Rehabilitation of Hunan Province, Hunan Normal University, Changsha, China
| | - Lan Zheng
- Key Laboratory of Physical Fitness and Exercise Rehabilitation of Hunan Province, Hunan Normal University, Changsha, China
| | - Fan Yang
- Key Laboratory of Physical Fitness and Exercise Rehabilitation of Hunan Province, Hunan Normal University, Changsha, China
| | - Han Zhe Li
- Key Laboratory of Physical Fitness and Exercise Rehabilitation of Hunan Province, Hunan Normal University, Changsha, China
| | - Jin Xiu Li
- Key Laboratory of Physical Fitness and Exercise Rehabilitation of Hunan Province, Hunan Normal University, Changsha, China
| | - Dan Cheng
- Key Laboratory of Physical Fitness and Exercise Rehabilitation of Hunan Province, Hunan Normal University, Changsha, China
| | - Kai Lu
- Key Laboratory of Physical Fitness and Exercise Rehabilitation of Hunan Province, Hunan Normal University, Changsha, China
| | - Yang Liu
- Key Laboratory of Physical Fitness and Exercise Rehabilitation of Hunan Province, Hunan Normal University, Changsha, China
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11
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Ma B, Li M, Fuchs S, Bischoff I, Hofmann A, Unger RE, Kirkpatrick CJ. Short‐term hypoxia promotes vascularization in co‐culture system consisting of primary human osteoblasts and outgrowth endothelial cells. J Biomed Mater Res A 2019; 108:7-18. [DOI: 10.1002/jbm.a.36786] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2019] [Revised: 08/08/2019] [Accepted: 08/12/2019] [Indexed: 01/23/2023]
Affiliation(s)
- Bin Ma
- Institute of Pathology, University Medical Centre of the Johannes Gutenberg University Mainz Mainz Germany
- Medical, Molecular and Forensic SciencesMurdoch University Murdoch Western Australia Australia
| | - Ming Li
- Institute of Pathology, University Medical Centre of the Johannes Gutenberg University Mainz Mainz Germany
| | - Sabine Fuchs
- Institute of Pathology, University Medical Centre of the Johannes Gutenberg University Mainz Mainz Germany
- Experimental Trauma SurgeryUniversity Medical Center Schleswig‐Holstein Kiel Kiel Germany
| | - Iris Bischoff
- Institute of Pathology, University Medical Centre of the Johannes Gutenberg University Mainz Mainz Germany
| | - Alexander Hofmann
- Department of Trauma SurgeryUniversity Medical Centre of the Johannes Gutenberg University Mainz Mainz Germany
| | - Ronald E. Unger
- Institute of Pathology, University Medical Centre of the Johannes Gutenberg University Mainz Mainz Germany
| | - Charles J. Kirkpatrick
- Institute of Pathology, University Medical Centre of the Johannes Gutenberg University Mainz Mainz Germany
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12
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MacLauchlan SC, Calabro NE, Huang Y, Krishna M, Bancroft T, Sharma T, Yu J, Sessa WC, Giordano F, Kyriakides TR. HIF-1α represses the expression of the angiogenesis inhibitor thrombospondin-2. Matrix Biol 2017; 65:45-58. [PMID: 28789925 DOI: 10.1016/j.matbio.2017.07.002] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2017] [Revised: 07/13/2017] [Accepted: 07/15/2017] [Indexed: 12/22/2022]
Abstract
Thrombospondin-2 (TSP2) is a potent inhibitor of angiogenesis whose expression is dynamically regulated following injury. In the present study, it is shown that HIF-1α represses TSP2 transcription. Specifically, in vitro studies demonstrate that the prolyl hydroxylase inhibitor DMOG or hypoxia decrease TSP2 expression in fibroblasts. This effect is shown to be via a transcriptional mechanism as hypoxia does not alter TSP2 mRNA stability and this effect requires the TSP2 promoter. In addition, the documented repressive effect of nitric oxide (NO) on TSP2 is shown to be non-canonical and involves stabilization of hypoxia inducible factor-1a (HIF-1α). The regulation of TSP2 by hypoxia is supported by the in vivo observation that TSP2 has spatiotemporal expression distinct from regions of hypoxia in gastrocnemius muscle following murine hindlimb ischemia (HLI). A role for TSP2 regulation by HIF-1α is supported by the dysregulation of TSP2 expression in SM22α-cre HIF-1α KO mice following HLI. Indeed, there is a reduction in blood flow recovery in the SM22a-cre HIF-1α KO mice compared to littermate controls following HLI surgery, associated with impaired recovery and increased TSP2 levels. Moreover, SM22α-cre HIF-1α KO smooth muscle cells mice have increased TSP2 mRNA levels that persist in hypoxia. These findings identify a novel, ischemia-induced pro-angiogenic mechanism involving the transcriptional repression of TSP2 by HIF-1α.
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Affiliation(s)
- Susan C MacLauchlan
- Interdepartmental Program in Vascular Biology and Therapeutics, Amistad Building, Yale University School of Medicine, New Haven, CT 06520, USA; Department of Pathology, Amistad Building, Yale University School of Medicine, New Haven, CT 06520, USA.
| | - Nicole E Calabro
- Interdepartmental Program in Vascular Biology and Therapeutics, Amistad Building, Yale University School of Medicine, New Haven, CT 06520, USA; Department of Pathology, Amistad Building, Yale University School of Medicine, New Haven, CT 06520, USA.
| | - Yan Huang
- Interdepartmental Program in Vascular Biology and Therapeutics, Amistad Building, Yale University School of Medicine, New Haven, CT 06520, USA; Section of Cardiovascular Medicine, Amistad Building, Yale University School of Medicine, New Haven, CT 06520, USA.
| | - Meenakshi Krishna
- Interdepartmental Program in Vascular Biology and Therapeutics, Amistad Building, Yale University School of Medicine, New Haven, CT 06520, USA.
| | - Tara Bancroft
- Interdepartmental Program in Vascular Biology and Therapeutics, Amistad Building, Yale University School of Medicine, New Haven, CT 06520, USA; Department of Pathology, Amistad Building, Yale University School of Medicine, New Haven, CT 06520, USA.
| | - Tanuj Sharma
- Interdepartmental Program in Vascular Biology and Therapeutics, Amistad Building, Yale University School of Medicine, New Haven, CT 06520, USA.
| | - Jun Yu
- Interdepartmental Program in Vascular Biology and Therapeutics, Amistad Building, Yale University School of Medicine, New Haven, CT 06520, USA; Section of Cardiovascular Medicine, Amistad Building, Yale University School of Medicine, New Haven, CT 06520, USA.
| | - William C Sessa
- Interdepartmental Program in Vascular Biology and Therapeutics, Amistad Building, Yale University School of Medicine, New Haven, CT 06520, USA; Department of Pharmacology, Amistad Building, Yale University School of Medicine, New Haven, CT 06520, USA.
| | - Frank Giordano
- Section of Cardiovascular Medicine, Amistad Building, Yale University School of Medicine, New Haven, CT 06520, USA.
| | - Themis R Kyriakides
- Interdepartmental Program in Vascular Biology and Therapeutics, Amistad Building, Yale University School of Medicine, New Haven, CT 06520, USA; Department of Pathology, Amistad Building, Yale University School of Medicine, New Haven, CT 06520, USA.
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13
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The Expression of IGFBP6 after Spinal Cord Injury: Implications for Neuronal Apoptosis. Neurochem Res 2016; 42:455-467. [PMID: 27888466 DOI: 10.1007/s11064-016-2092-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2016] [Revised: 10/11/2016] [Accepted: 10/27/2016] [Indexed: 01/03/2023]
Abstract
IGFBP6, a member of the insulin-like growth factor-binding proteins family that contains six high affinity IGFBPs, modulates insulin-like growth factor (IGF) activity and also showed an independent effect of IGF, such as growth inhibition and apoptosis. However, the role of IGFBP6 in spinal cord injury (SCI) remains largely elusive. In this study, we have performed an acute SCI model in adult rats and investigated the dynamic changes of IGFBP6 expression in the spinal cord. Our results showed that IGFBP6 was upregulated significantly after SCI, which was paralleled with the levels of apoptotic proteins p53 and active caspase-3. Immunofluorescent labeling showed that IGFBP6 was co-localizated with active caspase-3 and p53 in neurons. To further investigate the function of IGFBP6, an apoptosis model was established in primary neuronal cells. When IGFBP6 was knocked down by specific short interfering RNA (siRNA), the protein levels of active caspase-3 and Bax as well as the number of apoptotic primary neurons were significantly decreased in our study. Taken together, our findings suggest that the change of IGFBP6 protein expression plays a key role in neuronal apoptosis after SCI.
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14
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Kamaleddin MA. The paradoxical pro- and antiangiogenic actions of resveratrol: therapeutic applications in cancer and diabetes. Ann N Y Acad Sci 2016; 1386:3-15. [PMID: 27880855 DOI: 10.1111/nyas.13283] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2016] [Revised: 09/24/2016] [Accepted: 09/29/2016] [Indexed: 02/06/2023]
Abstract
Resveratrol, a polyphenol found in grapes, peanuts, and red wine, plays different roles in diseases such as cancer and diabetes. Existing information indicates that resveratrol provides cardioprotection, as evidenced by superior postischemic ventricular recovery, reduced myocardial infarct size, and decreased number of apoptotic cardiomyocytes associated with resveratrol treatment in animal models. Cardiovascular benefits are experienced in humans with routine but not acute consumption of red wine. In this concise review, the paradoxical pro- and antiangiogenic effects of resveratrol are described, and different roles for resveratrol in the formation of new blood vessels are explained through different mechanisms. It is hypothesized that the effects of resveratrol on different cell types are not only dependent on its concentration but also on the physical and chemical conditions surrounding cells. The findings discussed herein shed light on potential therapeutic proapoptotic and antiangiogenic applications of low-dose resveratrol treatment in the prevention and treatment of different diseases.
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15
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Bach LA. Current ideas on the biology of IGFBP-6: More than an IGF-II inhibitor? Growth Horm IGF Res 2016; 30-31:81-86. [PMID: 27681092 DOI: 10.1016/j.ghir.2016.09.004] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/25/2016] [Revised: 09/15/2016] [Accepted: 09/22/2016] [Indexed: 12/22/2022]
Abstract
IGFBP-6 binds IGF-II with higher affinity than IGF-I and it is a relatively specific inhibitor of IGF-II actions. More recently, IGFBP-6 has also been reported to have IGF-independent effects on cell proliferation, survival, differentiation and migration. IGFBP-6 binds to several ligands in the extracellular space, cytoplasm and nucleus. These interactions, together with activation of distinct intracellular signaling pathways, may contribute to its IGF-independent actions; for example, IGF-independent migration induced by IGFBP-6 involves interaction with prohibitin-2 and activation of MAP kinase pathways. A major challenge for the future is delineating the relative roles of the IGF-dependent and -independent actions of IGFBP-6, which may lead to the development of therapeutic approaches for diseases including cancer.
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Affiliation(s)
- Leon A Bach
- Department of Medicine (Alfred), Monash University, Prahran 3181, Australia; Department of Endocrinology and Diabetes, Alfred Hospital, Melbourne 3004, Australia.
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16
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Tao L, Wang S, Zhao Y, Wang AY, Zhang L, Ruan JS, Fan FT, Liu YP, Li Y, Yue ZQ, Qian WH, Chen WX, Lu Y. Pleiotropic effects of herbs characterized with blood-activating and stasis-resolving functions on angiogenesis. Chin J Integr Med 2016; 22:795-800. [PMID: 27358204 DOI: 10.1007/s11655-015-2405-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2012] [Indexed: 11/25/2022]
Abstract
Accumulative evidences have underpinned the nature candidates from Chinese medicine (CM), particularly CM served as blood activating and stasis resolving (BASR, Huoxue Huayu in Chinese) by targeting tumor-associated angiogenesis. However, recent experiment research on the therapeutic angiogenesis by BASR-CM attracts wide attention and discussion. This opinion review focused on the underlying link between two indications and anticipated that (1) BASR-CM might emphasize on a balanced multi-cytokines network interaction; (2) BASR-CM might address on the nature of diseases prior to differently affecting physiological and pathological angiogenesis; (3) BASR-CM might mainly act on perivascular cells, either promotes arteriogenesis by increasing arteriogenic factors in ischemic diseases, or simultaneously keep a quiescent vasculature to impede angiogenesis in tumor context.
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Affiliation(s)
- Li Tao
- Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, 210023, China
| | - Sheng Wang
- Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, 210023, China
| | - Yang Zhao
- Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, 210023, China
| | - Ai-Yun Wang
- Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, 210023, China
- Jiangsu Collaborative Innovation Center of Traditional Chinese Medicine Prevention and Treatment of Tumor, Nanjing University of Chinese Medicine, Nanjing, 210023, China
| | - Lei Zhang
- Department of Pharmacy, Provincial Hospital Affiliated to Anhui Medical University, Hefei, 230001, China
| | - Jun-Shan Ruan
- Fujian Provincial Hospital, Clinical College of Fujian Medical University, Fuzhou, 350001, China
| | - Fang-Tian Fan
- Department of Pharmacology, Hanlin College, Nanjing University of Chinese Medicine, Taizhou Jiangsu Province, 225300, China
| | - Yu-Ping Liu
- Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, 210023, China
| | - Yao Li
- Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, 210023, China
| | - Zhi-Qiang Yue
- Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, 210023, China
| | - Wen-Hui Qian
- Department of Pharmaceutics, Jinling Hospital, Nanjing University School of Medicine, Nanjing, 210002, China
| | - Wen-Xing Chen
- Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, 210023, China
- Jiangsu Collaborative Innovation Center of Traditional Chinese Medicine Prevention and Treatment of Tumor, Nanjing University of Chinese Medicine, Nanjing, 210023, China
| | - Yin Lu
- Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, 210023, China.
- Jiangsu Collaborative Innovation Center of Traditional Chinese Medicine Prevention and Treatment of Tumor, Nanjing University of Chinese Medicine, Nanjing, 210023, China.
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17
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Aplin AC, Nicosia RF. Hypoxia paradoxically inhibits the angiogenic response of isolated vessel explants while inducing overexpression of vascular endothelial growth factor. Angiogenesis 2016; 19:133-46. [PMID: 26748649 DOI: 10.1007/s10456-015-9493-2] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2015] [Accepted: 12/30/2015] [Indexed: 01/08/2023]
Abstract
This study was designed to investigate how changes in O2 levels affected angiogenesis in vascular organ culture. Although hypoxia is a potent inducer of angiogenesis, aortic rings cultured in collagen paradoxically failed to produce an angiogenic response in 1-4 % O2. Additionally, aortic neovessels preformed in atmospheric O2 lost pericytes and regressed at a faster rate than control when exposed to hypoxia. Aortic explants remained viable in hypoxia and produced an angiogenic response when returned to atmospheric O2. Hypoxic aortic rings were unresponsive to VEGF, while increased oxygenation of the system dose-dependently enhanced VEGF-induced angiogenesis. Hypoxia-induced refractoriness to angiogenic stimulation was not restricted to the aorta because similar results were obtained with vena cava explants or isolated endothelial cells. Unlike endothelial cells, aorta-derived mural cells were unaffected by hypoxia. Hypoxia downregulated expression in aortic explants of key signaling molecules including VEGFR2, NRP1 and Prkc-beta while upregulating expression of VEGFR1. Medium conditioned by hypoxic cultures exhibited angiostatic and anti-VEGF activities likely mediated by sVEGFr1. Hypoxia reduced expression of VEGFR1 and VEGFR2 in endothelial cells while upregulating VEGFR1 in macrophages and VEGF in both macrophages and mural cells. Thus, changes in O2 levels profoundly affect the endothelial response to angiogenic stimuli. These results suggest that hypoxia-induced angiogenesis is fine-tuned by complex regulatory mechanisms involving not only production of angiogenic factors including VEGF but also differential regulation of VEGFR expression in different cell types and production of inhibitors of VEGF function such as sVEGFR1.
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Affiliation(s)
- Alfred C Aplin
- Department of Pathology, University of Washington, Seattle, WA, USA
| | - Roberto F Nicosia
- Department of Pathology, University of Washington, Seattle, WA, USA. .,Pathology and Laboratory Medicine Service (S-113-Lab), VA Puget Sound Health Care System, Seattle, WA, USA.
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18
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Abstract
Insulin-like growth factor binding proteins (IGFBPs) 4-6 have important roles as modulators of IGF actions. IGFBP-4 and IGFBP-6 predominantly inhibit IGF actions, whereas IGFBP-5 may enhance these actions under some circumstances. IGFBP-6 is unique among the IGFBPs for its marked IGF-II binding preference. IGFBPs 4-6 are found in the circulation as binary complexes with IGFs that can enter tissues. Additionally, about half of the circulating IGFBP-5 is found in ternary complexes with IGFs and an acid labile subunit; this high molecular complex cannot leave the circulation and acts as an IGF reservoir. IGFBPs 4-6 also have IGF-independent actions. These IGFBPs are regulated in a cell-specific manner and their dysregulation may play a role in a range of diseases including cancer. However, there is no clear clinical indication for measuring serum levels of these IGFBPs at present.
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Affiliation(s)
- Leon A Bach
- Department of Medicine (Alfred), Monash University, Prahran, 3181, Australia; Department of Endocrinology and Diabetes, Alfred Hospital, Melbourne, 3004, Australia.
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19
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Bach LA. Recent insights into the actions of IGFBP-6. J Cell Commun Signal 2015; 9:189-200. [PMID: 25808083 DOI: 10.1007/s12079-015-0288-4] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2014] [Accepted: 03/16/2015] [Indexed: 12/28/2022] Open
Abstract
IGFBP-6 is an O-linked glycoprotein that preferentially binds IGF-II over IGF-I. It is a relatively selective inhibitor of IGF-II actions including proliferation, survival and differentiation of a wide range of cells. IGFBP-6 has recently been shown to have a number of IGF-independent actions, including promotion of apoptosis in some cells and inhibition of angiogenesis. IGFBP-6 also induces migration of tumour cells including rhabdomyosarcomas by an IGF-independent mechanism. This chemotactic effect is mediated by MAP kinases. IGFBP-6 binds to prohibitin-2 on the cell surface and the latter is required for IGFBP-6-induced migration by a mechanism that is independent of MAP kinases. IGFBP-6 may enter the nucleus and modulate cell survival and differentiation. IGFBP-6 expression is decreased in a number of cancer cells and it has been postulated to act as a tumour suppressor. IGFBP-6 expression is increased in a smaller number of cancers, which may reflect a compensatory mechanism to control IGF-II actions or IGF-independent actions. The relative balance of IGF-dependent and IGF-independent actions of IGFBP-6 in vivo together with the related question regarding the roles of IGFBP-6 binding to IGF and non-IGF ligands are keys to understanding the physiological role of this protein.
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Affiliation(s)
- Leon A Bach
- Department of Medicine (Alfred), Monash University, Prahran, 3181, Australia,
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20
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Abstract
Endothelial cells line blood vessels and modulate vascular tone, thrombosis, inflammatory responses and new vessel formation. They are implicated in many disease processes including atherosclerosis and cancer. IGFs play a significant role in the physiology of endothelial cells by promoting migration, tube formation and production of the vasodilator nitric oxide. These actions are mediated by the IGF1 and IGF2/mannose 6-phosphate receptors and are modulated by a family of high-affinity IGF binding proteins. IGFs also increase the number and function of endothelial progenitor cells, which may contribute to protection from atherosclerosis. IGFs promote angiogenesis, and dysregulation of the IGF system may contribute to this process in cancer and eye diseases including retinopathy of prematurity and diabetic retinopathy. In some situations, IGF deficiency appears to contribute to endothelial dysfunction, whereas IGF may be deleterious in others. These differences may be due to tissue-specific endothelial cell phenotypes or IGFs having distinct roles in different phases of vascular disease. Further studies are therefore required to delineate the therapeutic potential of IGF system modulation in pathogenic processes.
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Affiliation(s)
- Leon A Bach
- Department of Medicine (Alfred)Monash University, Prahran 3181, AustraliaDepartment of Endocrinology and DiabetesAlfred Hospital, Commercial Road, Melbourne 3004, Australia Department of Medicine (Alfred)Monash University, Prahran 3181, AustraliaDepartment of Endocrinology and DiabetesAlfred Hospital, Commercial Road, Melbourne 3004, Australia
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21
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Novel chelate complexes of Co(II), Ni(II), Cu(II), Pd(II) derived from anti- and syn-isomers of 2-(2-aminothiazole-4-yl)-2-hydroxyiminoacetic acid with pro-/antiproliferative actions on endothelial cells. Polyhedron 2015. [DOI: 10.1016/j.poly.2014.08.034] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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22
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Góralczyk K, Szymańska J, Łukowicz M, Drela E, Kotzbach R, Dubiel M, Michalska M, Góralczyk B, Zając A, Rość D. Effect of LLLT on endothelial cells culture. Lasers Med Sci 2014; 30:273-8. [PMID: 25231826 PMCID: PMC4289014 DOI: 10.1007/s10103-014-1650-0] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2013] [Accepted: 08/29/2014] [Indexed: 02/02/2023]
Abstract
Growth factors as vascular endothelial growth factor (VEGF), produced by the endothelial cells, take an essential part in pathological and physiological angiogenesis. The possibility of angiogenesis modulation by application of laser radiation may contribute to the improvement of its use in this process. Thus, the aim of the study was to investigate the influence of low-level laser therapy (LLLT) on the proliferation of endothelial cells, secretion of VEGF-A and presence of soluble VEGF receptors (sVEGFR-1 and sVEGFR-2) in the medium after in vitro culture. Isolated human umbilical vein endothelial cells (HUVECs) were irradiated using a diode laser at a wavelength of 635 nm and power density of 1,875 mW/cm2. Depending on radiation energy density, the experiment was conducted in four groups: I 0 J/cm2 (control group), II 2 J/cm2, III 4 J/cm2, and IV 8 J/cm2. The use of laser radiation wavelength of 635 nm, was associated with a statistically significant increase in proliferation of endothelial cells (p = 0.0041). Moreover, at 635-nm wavelength, all doses of radiation significantly reduced the concentration of sVEGFR-1 (p = 0.0197).
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Affiliation(s)
- Krzysztof Góralczyk
- Department of Pathophysiology, Collegium Medicum in Bydgoszcz, The Nicolaus Copernicus University in Toruń (NCU), Ul. M. Skłodowskiej-Curie 9, 85-094, Bydgoszcz, Poland,
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23
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Uluer E, Inan S, Ozbilgin K, Karaca F, Dicle N, Sancı M. The role of hypoxia related angiogenesis in uterine smooth muscle tumors. Biotech Histochem 2014; 90:102-10. [DOI: 10.3109/10520295.2014.952339] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
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Abstract
The IGF (insulin-like growth factor) system is essential for physiological growth and it is also implicated in a number of diseases including cancer. IGF activity is modulated by a family of high-affinity IGF-binding proteins, and IGFBP-6 is distinctive because of its marked binding preference for IGF-II over IGF-I. A principal role for IGFBP-6 is inhibition of IGF-II actions, but recent studies have indicated that IGFBP-6 also has IGF-independent effects, including inhibition of angiogenesis and promotion of cancer cell migration. The present review briefly summarizes the IGF system in physiology and disease before focusing on recent studies on the regulation and actions of IGFBP-6, and its potential roles in cancer cells. Given the widespread interest in IGF inhibition in cancer therapeutics, increasing our understanding of the mechanisms underlying the actions of the IGF ligands, receptors and binding proteins, including IGFBP-6, will enhance our ability to develop optimal treatments that can be targeted to the most appropriate patients.
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25
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Bienes-Martínez R, Ordóñez A, Feijoo-Cuaresma M, Corral-Escariz M, Mateo G, Stenina O, Jiménez B, Calzada MJ. Autocrine stimulation of clear-cell renal carcinoma cell migration in hypoxia via HIF-independent suppression of thrombospondin-1. Sci Rep 2012; 2:788. [PMID: 23145312 PMCID: PMC3494377 DOI: 10.1038/srep00788] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2012] [Accepted: 10/04/2012] [Indexed: 12/14/2022] Open
Abstract
Thrombospondin-1 is a matricellular protein with potent antitumour activities, the levels of which determine the fate of many different tumours, including renal carcinomas. However, the factors that regulate this protein remain unclear. In renal carcinomas, hypoxic conditions enhance the expression of angiogenic factors that help adapt tumour cells to their hostile environment. Therefore, we hypothesized that anti-angiogenic factors should correspondingly be dampened. Indeed, we found that hypoxia decreased the thrombospondin-1 protein in several clear cell renal carcinoma cell lines (ccRCC), although no transcriptional regulation was observed. Furthermore, we proved that hypoxia stimulates multiple signals that independently contribute to diminish thrombospondin-1 in ccRCC, which include a decrease in the activity of oxygen-dependent prolylhydroxylases (PHDs) and activation of the PI3K/Akt signalling pathway. In addition, thrombospondin-1 regulation in hypoxia proved to be important for ccRCC cell migration and invasion.
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Affiliation(s)
- Raquel Bienes-Martínez
- Instituto de Investigación Sanitaria Princesa, Department of Medicine, Universidad Autónoma of Madrid, Madrid, Spain
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Kurihara T, Westenskow PD, Krohne TU, Aguilar E, Johnson RS, Friedlander M. Astrocyte pVHL and HIF-α isoforms are required for embryonic-to-adult vascular transition in the eye. ACTA ACUST UNITED AC 2012; 195:689-701. [PMID: 22084310 PMCID: PMC3257537 DOI: 10.1083/jcb.201107029] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The von Hippel–Lindau tumor suppressor and the hypoxia-inducible factor-αs are essential for the transition from embryonic hyaloidal vascular system to adult retinal vasculature in the mouse eye. Successful transition from embryonic to adult circulation is critical for survival of mammalian organisms. This shift occurs in the central cardiovascular circulation and in the eye as oxygen tension increases. However, its regulation is not well understood. We have used combinatorial gene deletion and overexpression assays to assess the effect of astrocyte-targeted deletion of von Hippel–Lindau tumor suppressor (Vhl), hypoxia-inducible factor-αs (Hif-αs), and Vegf on the normal regression of the hyaloidal vessels, the fetal ocular circulation system. Astrocytic Vhl deletion induced accelerated hyaloidal regression and subsequent massive secondary outgrowth. Combinatorial gene deletion involving Vhl, Hif-αs, and Vegf genes revealed that HIF-2α/vascular endothelial growth factor signaling induces secondary outgrowth in Vhl mutants. Conversely, HIF-1α regulated macrophage migration inhibitory factor and promoted macrophage infiltration that accelerates hyaloidal vessel regression. The phenotype observed in Vhl mutants strongly resembles human persistent hyperplastic primary vitreous cases and may provide insights into vascular remodeling mechanisms in other systems.
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Affiliation(s)
- Toshihide Kurihara
- Department of Cell Biology, The Scripps Research Institute, La Jolla, CA 92037, USA
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Marques SM, Campos PP, Castro PR, Cardoso CC, Ferreira MA, Andrade SP. Genetic background determines mouse strain differences in inflammatory angiogenesis. Microvasc Res 2011; 82:246-52. [DOI: 10.1016/j.mvr.2011.08.011] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2011] [Revised: 08/05/2011] [Accepted: 08/25/2011] [Indexed: 11/27/2022]
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Hypoxia signature of splice forms of tryptophanyl-tRNA synthetase marks pancreatic cancer cells with distinct metastatic abilities. Pancreas 2011; 40:1043-56. [PMID: 21926542 DOI: 10.1097/mpa.0b013e318222e635] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
OBJECTIVES Pancreatic cancer is one of most deadly because of its aggressive growth and high metastatic ability that correlates with intratumoral hypoxia. Earlier diagnosis and prognosis marker of pancreatic cancer is not yet available. In colorectal cancer, protein biosynthesis enzyme, tryptophanyl-tRNA synthetase (TrpRS), is up-regulated in good-prognosis tumors and down-regulated in metastatic poor-prognosis tumors. Tryptophanyl-tRNA synthetase status in pancreatic cancer is unknown. To correlate metastatic ability with hypoxia and TrpRS as a possible prognostic marker, we examined mRNA and protein expression in 2 human pancreatic cancer cell lines with different metastatic abilities and TrpRS levels using our site-specific monoclonal antibodies directed to conformation-dependent epitopes on pancreatic TrpRS. METHODS Pancreatic MIAPaCa-2, Panc-1, cervical HeLa, and prostate cancer PC-3 cells were cultivated under normoxia or in hypoxic chamber. Expression of full-length TrpRS, antiangiogenic TrpRS, cyclin B1, hypoxia-inducible factor 1α, and Glut-1 was determined with reverse transcriptase-polymerase chain reaction, immunoblotting, and immunocytochemistry. RESULTS We demonstrate that hypoxia regulates differentially TrpRS splice forms. Pronounced down-regulation of full-length TrpRS by hypoxia is concomitant with higher metastatic ability. CONCLUSIONS Tryptophanyl-tRNA synthetase down-regulation by hypoxia may be a factor responsible for low TrpRS in tumors with high metastatic ability. Tryptophanyl-tRNA synthetase recognizability is important for pancreatic cancer prognosis and as a new target for metastasis treatment.
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Zhang C, Lu L, Li Y, Wang X, Zhou J, Liu Y, Fu P, Gallicchio MA, Bach LA, Duan C. IGF binding protein-6 expression in vascular endothelial cells is induced by hypoxia and plays a negative role in tumor angiogenesis. Int J Cancer 2011; 130:2003-12. [PMID: 21618524 DOI: 10.1002/ijc.26201] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2010] [Accepted: 05/06/2011] [Indexed: 12/12/2022]
Abstract
Hypoxia stimulates tumor angiogenesis by inducing the expression of angiogenic molecules. The negative regulators of this process, however, are not well understood. Here, we report that hypoxia induced the expression of insulin-like growth factor binding protein-6 (IGFBP-6), a tumor repressor, in human and rodent vascular endothelial cells (VECs) via a hypoxia-inducible factor (HIF)-mediated mechanism. Addition of human IGFBP-6 to cultured human VECs inhibited angiogenesis in vitro. An IGFBP-6 mutant with at least 10,000-fold lower binding affinity for IGFs was an equally potent inhibitor of angiogenesis, suggesting that this action of IGFBP-6 is IGF-independent. The functional relationship between IGFBP-6 and vascular endothelial growth factor (VEGF), a major hypoxia-inducible angiogenic molecule, was examined. While VEGF alone increased angiogenesis in vitro, co-incubation with IGFBP-6 abolished VEGF-stimulated angiogenesis. The in vivo role of IGFBP-6 in angiogenesis was tested in flk1:GFP zebrafish embryos, which exhibit green fluorescence protein in developing vascular endothelium, permitting visualization of developing blood vessels. Injection of human IGFBP-6 mRNA reduced the number of embryonic inter-segmental blood vessels by ∼40%. This anti-angiogenic activity is conserved in zebrafish because expression of zebrafish IGFBP-6b had similar effects. To determine the anti-angiogenic effect of IGFBP-6 in a tumor model, human Rh30 rhabdomyosarcoma cells stably transfected with IGFBP-6 were inoculated into athymic BALB/c nude mice. Vessel density was 52% lower in IGFBP-6-transfected xenografts than in vector control xenografts. These results suggest that the expression of IGFBP-6 in VECs is up-regulated by hypoxia and IGFBP-6 inhibits angiogenesis in vitro and in vivo.
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Affiliation(s)
- Chunyang Zhang
- Key Laboratory of Marine Drugs (Ocean University of China), Ministry of Education and School of Medicine and Pharmacy, Ocean University of China, Qingdao, Shandong, China
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