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He F, Ma C, Feng J, Li X, Xia S, Lin Q, Dai R. Angiogenesis effects of 4-methoxy benzyl alcohol on cerebral ischemia-reperfusion injury via regulation of VEGF-Ang/Tie2 balance. Can J Physiol Pharmacol 2021; 99:1253-1263. [PMID: 34283928 DOI: 10.1139/cjpp-2021-0118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Angiogenesis facilitates the formation of microvascular networks and promotes neurological deficit recovery after cerebral ischemia-reperfusion injury (CIRI). This study investigated the angiogenesis effects of 4-methoxy benzyl alcohol (4-MA) on CIRI. The angiogenesis effects of 4-MA and the potential underlying mechanisms were assessed based on a middle cerebral artery occlusion/reperfusion (MCAO/R) rat model and a hind limb ischemic (HLI) mouse model. Immunofluorescence was conducted to detect microvessel density, and Western blotting and polymerase chain reaction were performed to determine the expression of angiogenesis-promoting factors. In addition, we investigated whether the angiogenesis effects of 4-MA caused damage to the blood-brain barrier (BBB). After treatment with 4-MA (20 mg/kg) for 7 days, the neurological deficits recovered and microvessel density in the cerebral cortex increased in the MCAO/R rats. Additionally, 4-MA also regulated the expression of angiogenesis factors, with an increase in vascular endothelial growth factor (VEGF) and vascular endothelial growth factor receptor 2 (VEGFR-2) expression and a decrease in angiopoietin 1 (Ang-1), Ang-2, and Tie-2 expression in both MCAO/R rats and HLI mice. Moreover, 4-MA increased the expression of angiogenesis-promoting factors without exacerbating BBB cascade damage in MCAO/R rats. Our results indicated that 4-MA may contribute to the formation of microvascular networks, thus promoting neurological deficit recovery after CIRI.
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Affiliation(s)
- Fangyan He
- Department of Pharmacology, Yunnan University of Traditional Chinese Medicine, Kunming, Yunnan 650500, China
| | - Chenjing Ma
- Research Institute of Resource Insects, Chinese Academy of Forestry, Kunming, Yunnan 650000, China
| | - Jin Feng
- Department of Pharmacology, Yunnan University of Traditional Chinese Medicine, Kunming, Yunnan 650500, China
| | - Xiufang Li
- Department of Pharmacology, Yunnan University of Traditional Chinese Medicine, Kunming, Yunnan 650500, China
| | - Shuangli Xia
- Department of Pharmacology, Yunnan University of Traditional Chinese Medicine, Kunming, Yunnan 650500, China
| | - Qing Lin
- Department of Pharmacology, Yunnan University of Traditional Chinese Medicine, Kunming, Yunnan 650500, China
| | - Rong Dai
- Department of Pharmacology, Yunnan University of Traditional Chinese Medicine, Kunming, Yunnan 650500, China
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Abstract
Skin flap transfer is an important method to repair and reconstruct various tissue defects; however, avascular necrosis largely affects the success of flap transfer. The sphingosine 1-phosphate receptor 1 (S1PR1) agonist SEW2871 has been proven to ameliorate ischemic injury; however, its effect on flap survival has not been reported. In this study, an experimental skin flap model was established in rats to investigate the roles of SEW2871. The results indicated that SEW2871 greatly increased the survival of the skin flap, alleviated pathological injury, promoted the angiogenesis, and inhibited cells apoptosis in skin flap tissues. SEW2871 activated S1PR1 downstream signaling pathways, including heat shock protein 27 (HSP27), extracellular regulated protein kinases (ERK), and protein kinase B (Akt). In addition, SEW2871 promoted the expression of S1PR1. These findings may provide novel insights for skin flap transfer.
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Affiliation(s)
- Dongdong Zhang
- Department of Hand Surgery, The Third Hospital of Hebei Medical University, Shijiazhuang, Hebei, 050051, People's Republic of China
- Department of Hand Surgery, The Third Hospital of Hebei Medical University, Shijiazhuang, Hebei, 050051, People's Republic of China
| | - Dongxu Qi
- Department of Hand Surgery, The Third Hospital of Hebei Medical University, Shijiazhuang, Hebei, 050051, People's Republic of China
- Department of Hand Surgery, The Third Hospital of Hebei Medical University, Shijiazhuang, Hebei, 050051, People's Republic of China
| | - Yi Xu
- Department of Hand Surgery, The Third Hospital of Hebei Medical University, Shijiazhuang, Hebei, 050051, People's Republic of China
- Department of Hand Surgery, The Third Hospital of Hebei Medical University, Shijiazhuang, Hebei, 050051, People's Republic of China
| | - Chunhe Hu
- Department of Hand Surgery, The Third Hospital of Hebei Medical University, Shijiazhuang, Hebei, 050051, People's Republic of China
- Department of Hand Surgery, The Third Hospital of Hebei Medical University, Shijiazhuang, Hebei, 050051, People's Republic of China
| | - Xiao Zhang
- Department of Hand Surgery, The Third Hospital of Hebei Medical University, Shijiazhuang, Hebei, 050051, People's Republic of China
- Department of Hand Surgery, The Third Hospital of Hebei Medical University, Shijiazhuang, Hebei, 050051, People's Republic of China
| | - Qingjian Yang
- Department of Hand Surgery, The Third Hospital of Hebei Medical University, Shijiazhuang, Hebei, 050051, People's Republic of China
- Department of Hand Surgery, The Third Hospital of Hebei Medical University, Shijiazhuang, Hebei, 050051, People's Republic of China
| | - Zikun Shang
- Department of Hand Surgery, The Third Hospital of Hebei Medical University, Shijiazhuang, Hebei, 050051, People's Republic of China
- Department of Hand Surgery, The Third Hospital of Hebei Medical University, Shijiazhuang, Hebei, 050051, People's Republic of China
| | - Guisheng Zhang
- Department of Hand Surgery, The Third Hospital of Hebei Medical University, Shijiazhuang, Hebei, 050051, People's Republic of China
- Department of Hand Surgery, The Third Hospital of Hebei Medical University, Shijiazhuang, Hebei, 050051, People's Republic of China
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Tian Y, Zhang L, Guo X, Gao Z, Zhang Y, Zhang L, Hou Z. Chronic intermittent hypobaric hypoxia attenuates ischemic limb injury by promoting angiogenesis in mice. Can J Physiol Pharmacol 2021; 99:1191-1198. [PMID: 34197721 DOI: 10.1139/cjpp-2021-0047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
This study aimed to evaluate the protective effect of chronic intermittent hypobaric hypoxia (CIHH) against limb ischemic injury. C57BL/6 mice were randomly divided into three groups: limb ischemic injury group (Ischemia, induced by ligation and excision of the left femoral artery), limb ischemia following CIHH pretreatment group (CIHH+Ischemia, simulated a 5000 m altitude hypoxia, 6 h per day for 28 days, before induction of hind-limb ischemia), and sham group (Sham). The blood flow in the mouse models of hind-limb ischemia was examined using laser doppler imaging. The functional and morphological performance of ischemic muscle was evaluated using contraction force and hematoxylin-eosin and Masson's trichrome staining. Angiogenesis was determined by immunohistochemistry staining of the endothelial markers CD31 and CD34. The protein expressions of angiogenesis-related genes were detected using Western blot assay. Chronic ischemia resulted in reduced blood perfusion, decreased contraction tension, and morphological destruction in gastrocnemius muscle. CIHH pretreatment increased the contractile force and muscle fiber diameter and decreased necrosis and fibrosis of the ischemic muscle. Also, CIHH significantly increased the density of CD31+ and CD34+ cells and promoted the expression of angiogenesis-related molecules in ischemic muscle. These data demonstrate that CIHH has a protective effect against chronic limb ischemia by promoting angiogenesis.
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Affiliation(s)
- Yanming Tian
- Department of Physiology, Hebei Medical University, Shijiazhuang, Hebei 050017, China
| | - Li Zhang
- Department of Orthopaedic Surgery, Third Hospital of Hebei Medical University, Shijiazhuang, Hebei 050051, China
| | - Xinqi Guo
- Department of Physiology, Hebei Medical University, Shijiazhuang, Hebei 050017, China
| | - Zheng Gao
- Department of Physiology, Hebei Medical University, Shijiazhuang, Hebei 050017, China
| | - Yi Zhang
- Department of Physiology, Hebei Medical University, Shijiazhuang, Hebei 050017, China
| | - Liping Zhang
- Department of Physiology, Hebei Medical University, Shijiazhuang, Hebei 050017, China
| | - Zhiyong Hou
- Department of Orthopaedic Surgery, Third Hospital of Hebei Medical University, Shijiazhuang, Hebei 050051, China
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Gaffney K, Lucero A, Macartney-Coxson D, Clapham J, Whitfield P, Palmer BR, Wakefield S, Faulkner J, Stoner L, Rowlands DS. Effects of whey protein on skeletal muscle microvascular and mitochondrial plasticity following 10 weeks of exercise training in men with type 2 diabetes. Appl Physiol Nutr Metab 2021; 46:915-924. [PMID: 33591858 DOI: 10.1139/apnm-2020-0943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Skeletal muscle microvascular dysfunction and mitochondrial rarefaction feature in type 2 diabetes mellitus (T2DM) linked to low tissue glucose disposal rate (GDR). Exercise training and milk protein supplementation independently promote microvascular and metabolic plasticity in muscle associated with improved nutrient delivery, but combined effects are unknown. In a randomised-controlled trial, 24 men (55.6 y, SD 5.7) with T2DM ingested whey protein drinks (protein/carbohydrate/fat: 20/10/3 g; WHEY) or placebo (carbohydrate/fat: 30/3 g; CON) before/after 45 mixed-mode intense exercise sessions over 10 weeks, to study effects on insulin-stimulated (hyperinsulinemic clamp) skeletal-muscle microvascular blood flow (mBF) and perfusion (near-infrared spectroscopy), and histological, genetic, and biochemical markers (biopsy) of microvascular and mitochondrial plasticity. WHEY enhanced insulin-stimulated perfusion (WHEY-CON 5.6%; 90% CI -0.1, 11.3), while mBF was not altered (3.5%; -17.5, 24.5); perfusion, but not mBF, associated (regression) with increased GDR. Exercise training increased mitochondrial (range of means: 40%-90%) and lipid density (20%-30%), enzyme activity (20%-70%), capillary:fibre ratio (∼25%), and lowered systolic (∼4%) and diastolic (4%-5%) blood pressure, but without WHEY effects. WHEY dampened PGC1α -2.9% (90% compatibility interval: -5.7, -0.2) and NOS3 -6.4% (-1.4, -0.2) expression, but other messenger RNA (mRNA) were unclear. Skeletal muscle microvascular and mitochondrial exercise adaptations were not accentuated by whey protein ingestion in men with T2DM. ANZCTR Registration Number: ACTRN12614001197628. Novelty: Chronic whey ingestion in T2DM with exercise altered expression of several mitochondrial and angiogenic mRNA. Whey added no additional benefit to muscle microvascular or mitochondrial adaptations to exercise. Insulin-stimulated perfusion increased with whey but was without impact on glucose disposal.
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Affiliation(s)
- Kim Gaffney
- School of Sport, Exercise and Nutrition, Massey University, Wellington and Auckland, New Zealand
| | - Adam Lucero
- School of Sport, Exercise and Nutrition, Massey University, Wellington and Auckland, New Zealand
| | - Donia Macartney-Coxson
- Human Genomics, Institute of Environmental and Scientific Research Ltd (ESR). Porirua, Wellington, New Zealand
| | - Jane Clapham
- Human Genomics, Institute of Environmental and Scientific Research Ltd (ESR). Porirua, Wellington, New Zealand
| | | | - Barry R Palmer
- School of Health Sciences, Massey University, Wellington, New Zealand
| | - StJohn Wakefield
- Department of Medicine, University of Otago, Wellington, New Zealand
| | - James Faulkner
- School of Sport, Health and Community, University of Winchester, Winchester, England
| | - Lee Stoner
- Department of Exercise and Sport Science, University of North Carolina, Chapel Hill, NC, USA
| | - David S Rowlands
- School of Sport, Exercise and Nutrition, Massey University, Wellington and Auckland, New Zealand
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5
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Abstract
Hyperhomocysteinemia (HHcy) affects bone remodeling, since a destructive process in cortical alveolar bone has been linked to it; however, the mechanism remains at large. HHcy increases proinflammatory cytokines viz. TNF-α, IL-1b, IL-6, and IL-8 that leads to a cascade that negatively impacts methionine metabolism and homocysteine cycling. Further, chronic inflammation decreases vitamins B12, B6, and folic acid that are required for methionine homocysteine homeostasis. This study aims to investigate a HHcy mouse model (cystathionine β-synthase deficient, CBS+/-) for studying the potential pathophysiological changes, if any, in the periodontium (gingiva, periodontal ligament, cement, and alveolar bone). We compared the periodontium side-by-side in the CBS+/- model with that of the wild-type (C57BL/6J) mice. Histology and histomorphometry of the mandibular bone along with gene expression analyses were carried out. Also, proangiogenic proteins and metalloproteinases were studied. To our knowledge, this research shows, for the first time, a direct connection between periodontal disease during CBS deficiency, thereby suggesting the existence of disease drivers during the hyperhomocysteinemic condition. Our findings offer opportunities to develop diagnostics/therapeutics for people who suffer from chronic metabolic disorders like HHcy.
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Affiliation(s)
- Dragana Stanisic
- Department of Dentistry, Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia
| | - Akash K George
- Department of Physiology, University of Louisville School of Medicine, Louisville, KY 40202, USA
| | - Irina Smolenkova
- Department of Physiology, University of Louisville School of Medicine, Louisville, KY 40202, USA
| | - Mahavir Singh
- Department of Physiology, University of Louisville School of Medicine, Louisville, KY 40202, USA
| | - Suresh C Tyagi
- Department of Physiology, University of Louisville School of Medicine, Louisville, KY 40202, USA
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Yu L, Fu J, Yu N, Wu Y, Han N. Long noncoding RNA MALAT1 participates in the pathological angiogenesis of diabetic retinopathy in an oxygen-induced retinopathy mouse model by sponging miR-203a-3p. Can J Physiol Pharmacol 2019; 98:219-227. [PMID: 31689123 DOI: 10.1139/cjpp-2019-0489] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Diabetic retinopathy (DR) is a devastating complication of diabetes. The aim of the present study is to investigate the exact role and mechanism of long noncoding RNA MALAT1 (MALAT1) in the progress of DR. An oxygen-induced retinopathy (OIR) mouse model and high glucose (HG) stimulated human retinal microvascular endothelial cells (HRMECs) were employed to mimic the pathological statues of DR. Quantitative real-time PCR (qRT-PCR) and Western blot results showed that MALAT1, VEGFA, and HIF-1α levels were increased in DR retinal tissues and HG-stimulated HRMECs, whereas the expression of miR-203a-3p was decreased. Knockdown of MALAT1 or upregulation of miR-203a-3p both suppressed HG-induced proliferation, migration, and tube formation of HRMECs. A dual-luciferase reporter assay showed that miR-203a-3p could bind to the predicted seed regions of MALAT1 as evidenced by the reduced luciferase activity. Furthermore, enforced downregulation of miR-203a-3p abolished the suppressive effect of MALAT1 silencing on HRMEC cell migration and tube formation. In conclusion, these data demonstrated that MALAT1 may affect angiogenesis by sponging miR-203a-3p in DR, suggesting that MALAT1 may act as a novel therapeutic target for the treatment of DR.
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Affiliation(s)
- Li Yu
- Department of Ophthalmology, The Second Hospital of Jilin University, Changchun 130041, People's Republic of China
| | - Jinling Fu
- Department of Ophthalmology, The Second Hospital of Jilin University, Changchun 130041, People's Republic of China
| | - Na Yu
- Department of Blood Transfusion, The Second Hospital of Jilin University, Changchun 130041, People's Republic of China
| | - Yazhen Wu
- Department of Ophthalmology, The Second Hospital of Jilin University, Changchun 130041, People's Republic of China
| | - Ning Han
- Department of Ophthalmology, The Second Hospital of Jilin University, Changchun 130041, People's Republic of China
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Majumder A, Singh M, George AK, Tyagi SC. Restoration of skeletal muscle homeostasis by hydrogen sulfide during hyperhomocysteinemia-mediated oxidative/ER stress condition 1. Can J Physiol Pharmacol 2018; 97:441-456. [PMID: 30422673 DOI: 10.1139/cjpp-2018-0501] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Elevated homocysteine (Hcy), i.e., hyperhomocysteinemia (HHcy), causes skeletal muscle myopathy. Among many cellular and metabolic alterations caused by HHcy, oxidative and endoplasmic reticulum (ER) stress are considered the major ones; however, the precise molecular mechanism(s) in this process is unclear. Nevertheless, there is no treatment option available to treat HHcy-mediated muscle injury. Hydrogen sulfide (H2S) is increasingly recognized as a potent anti-oxidant, anti-apoptotic/necrotic/pyroptotic, and anti-inflammatory compound and also has been shown to improve angiogenesis during ischemic injury. Patients with CBS mutation produce less H2S, making them vulnerable to Hcy-mediated cellular damage. Many studies have reported bidirectional regulation of ER stress in apoptosis through JNK activation and concomitant attenuation of cell proliferation and protein synthesis via PI3K/AKT axis. Whether H2S mitigates these detrimental effects of HHcy on muscle remains unexplored. In this review, we discuss molecular mechanisms of HHcy-mediated oxidative/ER stress responses, apoptosis, angiogenesis, and atrophic changes in skeletal muscle and how H2S can restore skeletal muscle homeostasis during HHcy condition. This review also highlights the molecular mechanisms on how H2S could be developed as a clinically relevant therapeutic option for chronic conditions that are aggravated by HHcy.
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Affiliation(s)
- Avisek Majumder
- a Department of Physiology, University of Louisville School of Medicine, Louisville, KY 40202, USA.,b Biochemistry and Molecular Genetics, University of Louisville School of Medicine, Louisville, KY 40202, USA
| | - Mahavir Singh
- a Department of Physiology, University of Louisville School of Medicine, Louisville, KY 40202, USA.,c Eye and Vision Science Laboratory, University of Louisville School of Medicine, Louisville, KY 40202, USA
| | - Akash K George
- a Department of Physiology, University of Louisville School of Medicine, Louisville, KY 40202, USA.,c Eye and Vision Science Laboratory, University of Louisville School of Medicine, Louisville, KY 40202, USA
| | - Suresh C Tyagi
- a Department of Physiology, University of Louisville School of Medicine, Louisville, KY 40202, USA
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Hong S, Chen S, Wang X, Sun D, Yan Z, Tai J, Bi M. ATAD2 silencing decreases VEGFA secretion through targeting has-miR-520a to inhibit angiogenesis in colorectal cancer. Biochem Cell Biol 2018; 96:761-768. [PMID: 29958090 DOI: 10.1139/bcb-2018-0081] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
ATPase family AAA domain-containing protein 2 (ATAD2) is involved in various types of cancers, including colorectal cancer. This study aimed to determine the role of ATAD2 in angiogenesis in colorectal cancer. Here, we downregulated ATAD2 expression in HCT116 and SW480 cells, and collected the conditioned medium (CM) from control and ATAD2-silenced cells. The effect of CM on human umbilical vein endothelial cells (HUVEC) was evaluated by using CCK-8, wound healing, tube formation, Western blot, and dual-luciferase reporter assays. Our results showed that the proliferation, migration, and tube formation of HUVEC were reduced in presence of ATAD2-silenced CM, and the levels of phosphorylated vascular endothelial growth factor receptor 2 (P-VEGFR2), CD31, and CD34 were downregulated. Mechanism studies showed that ATAD2 silencing regulated the expression of vascular endothelial growth factor A (VEGFA) and miR-520a. Moreover, we found that miR-520a could bind to ATAD2, and its inhibitor partly reversed the alterations in HUVEC induced by CM from ATAD2-silenced cells. In addition, we demonstrated that miR-520a directly bound to 3'-UTR of VEGFA and inhibited its expression. Collectively, our results indicate that ATAD2 inhibition suppresses VEGFA secretion by increasing miR-520a levels. Our study suggests ATAD2 as a potential therapeutic target for angiogenesis in colorectal cancer.
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Affiliation(s)
- Sen Hong
- a Department of Colorectal and Anal Surgery, The First Hospital of Jilin University, Changchun 130021, People's Republic of China
| | - Si Chen
- a Department of Colorectal and Anal Surgery, The First Hospital of Jilin University, Changchun 130021, People's Republic of China
| | - Xu Wang
- a Department of Colorectal and Anal Surgery, The First Hospital of Jilin University, Changchun 130021, People's Republic of China
| | - Di Sun
- a Department of Colorectal and Anal Surgery, The First Hospital of Jilin University, Changchun 130021, People's Republic of China
| | - Zhenkun Yan
- b Endoscopy Center, China-Japan Union Hospital of Jilin University, Changchun 130033, People's Republic of China
| | - Jiandong Tai
- a Department of Colorectal and Anal Surgery, The First Hospital of Jilin University, Changchun 130021, People's Republic of China
| | - Miaomiao Bi
- c Department of Ophthalmology, China-Japan Union Hospital of Jilin University, Changchun 130033, People's Republic of China
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Ludzki AC, Pataky MW, Cartee GD, Horowitz JF. Acute endurance exercise increases Vegfa mRNA expression in adipose tissue of rats during the early stages of weight gain. Appl Physiol Nutr Metab 2018; 43:751-754. [PMID: 29486133 DOI: 10.1139/apnm-2017-0434] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The aim of this study was to determine the effects of acute exercise on key factors regulating angiogenesis in adipose tissue. Adipose tissue Vegf-a messenger RNA expression was upregulated immediately after acute exercise (p < 0.05) in rats consuming a high-fat diet, but was lower after exercise (p < 0.05) in rats consuming a low-fat diet. Our working hypothesis is that acute exercise augments angiogenic signaling under conditions when adipose tissue is expanding, and with repeated exercise sessions these signals can accrue to enhance vascularization.
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Affiliation(s)
- Alison C Ludzki
- School of Kinesiology, University of Michigan, 401 Washtenaw Ave., Ann Arbor, MI 48109, USA.,School of Kinesiology, University of Michigan, 401 Washtenaw Ave., Ann Arbor, MI 48109, USA
| | - Mark W Pataky
- School of Kinesiology, University of Michigan, 401 Washtenaw Ave., Ann Arbor, MI 48109, USA.,School of Kinesiology, University of Michigan, 401 Washtenaw Ave., Ann Arbor, MI 48109, USA
| | - Gregory D Cartee
- School of Kinesiology, University of Michigan, 401 Washtenaw Ave., Ann Arbor, MI 48109, USA.,School of Kinesiology, University of Michigan, 401 Washtenaw Ave., Ann Arbor, MI 48109, USA
| | - Jeffrey F Horowitz
- School of Kinesiology, University of Michigan, 401 Washtenaw Ave., Ann Arbor, MI 48109, USA.,School of Kinesiology, University of Michigan, 401 Washtenaw Ave., Ann Arbor, MI 48109, USA
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Huang Y, Mao Y, Li H, Shen G, Nan G. Knockdown of Nrf2 inhibits angiogenesis by downregulating VEGF expression through PI3K/Akt signaling pathway in cerebral microvascular endothelial cells under hypoxic conditions. Biochem Cell Biol 2018; 96:475-482. [PMID: 29373803 DOI: 10.1139/bcb-2017-0291] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Ischemic stroke is a major cerebrovascular disease resulting from a transient or permanent local reduction of cerebral blood flow. Angiogenesis plays an important role in cerebral microvascular repair after ischemic stroke. This study aimed at investigating the effect of NF-E2-related factor 2 (Nrf2) on the angiogenesis of mouse cerebral microvascular endothelial bEnd.3 cells in a hypoxic environment. We found that Nrf2 expression was temporarily increased in hypoxia-induced bEnd.3 cells. Knockdown of Nrf2 inhibited the proliferation, migration, as well as tube formation in hypoxia-induced bEnd.3 cells. Meanwhile, vascular endothelial growth factor and PI3K/Akt signaling pathways were identified to be regulated by Nrf2 in hypoxia-induced bEnd.3 cells. It was found that silencing of Nrf2 downregulated the expression levels of NAD(P)H:quinine oxidoreductase-1, vascular endothelial growth factor, p-Akt, and heme oxygenase-1 in hypoxia-induced bEnd.3 cells. Data suggested that hypoxia induced the transient increase of Nrf2, which plays a key role in the angiogenesis of cerebral microangiogenesis, and that Nrf2 regulates the proliferation, migration, as well as tube formation likely through PI3K/Akt signaling pathway in hypoxia-induced bEnd.3 cells. Our study provides proof of concept for the modulation of Nrf2, so as to tilt the balance toward angiogenesis, representing a therapeutic strategy for hypoxia or ischemia disorders such as stroke.
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Affiliation(s)
- Yujing Huang
- Department of Neurology, China-Japan Union Hospital of Jilin University, Changchun 130033, People's Republic of China.,Department of Neurology, China-Japan Union Hospital of Jilin University, Changchun 130033, People's Republic of China
| | - Ying Mao
- Department of Neurology, China-Japan Union Hospital of Jilin University, Changchun 130033, People's Republic of China.,Department of Neurology, China-Japan Union Hospital of Jilin University, Changchun 130033, People's Republic of China
| | - Huiying Li
- Department of Neurology, China-Japan Union Hospital of Jilin University, Changchun 130033, People's Republic of China.,Department of Neurology, China-Japan Union Hospital of Jilin University, Changchun 130033, People's Republic of China
| | - Guangxun Shen
- Department of Neurology, China-Japan Union Hospital of Jilin University, Changchun 130033, People's Republic of China.,Department of Neurology, China-Japan Union Hospital of Jilin University, Changchun 130033, People's Republic of China
| | - Guangxian Nan
- Department of Neurology, China-Japan Union Hospital of Jilin University, Changchun 130033, People's Republic of China.,Department of Neurology, China-Japan Union Hospital of Jilin University, Changchun 130033, People's Republic of China
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11
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Xu YJ, Elimban V, Dhalla NS. Carbon dioxide water-bath treatment augments peripheral blood flow through the development of angiogenesis. Can J Physiol Pharmacol 2017; 95:938-944. [PMID: 28704614 DOI: 10.1139/cjpp-2017-0125] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
In this study, we investigated the effects of CO2 water-bath therapy on blood flow and angiogenesis in the ischemic hind limb, as well as some plasma angiogenic factors in peripheral ischemic model. The hind limb ischemia was induced by occluding the femoral artery for 2 weeks in rats and treated with or without CO2 water-bath therapy at 37 °C for 4 weeks (20 min treatment every day for 5 days per week). The peak blood flow and minimal and mean blood flow in the ischemic skeletal muscle were markedly increased by the CO2 water-bath therapy. This increase in blood flow was associated with development of angiogenesis in the muscle, as well as reduction in the ischemia-induced increase in plasma malondialdehyde levels. Although plasma vascular endothelial growth factor and nitric oxide levels were increased in animals with peripheral ischemia, the changes in these biomarkers were not affected by CO2 water-bath therapy. These results suggest that augmentation of blood flow in the ischemic hind limb by CO2 water-bath therapy may be due to the development of angiogenesis and reduction in oxidative stress.
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Affiliation(s)
- Yan-Jun Xu
- Institute of Cardiovascular Sciences, St. Boniface Hospital Albrechtsen Research Centre, Department of Physiology and Pathophysiology, Max Rady College of Medicine, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB R2H 2A6, Canada.,Institute of Cardiovascular Sciences, St. Boniface Hospital Albrechtsen Research Centre, Department of Physiology and Pathophysiology, Max Rady College of Medicine, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB R2H 2A6, Canada
| | - Vijayan Elimban
- Institute of Cardiovascular Sciences, St. Boniface Hospital Albrechtsen Research Centre, Department of Physiology and Pathophysiology, Max Rady College of Medicine, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB R2H 2A6, Canada.,Institute of Cardiovascular Sciences, St. Boniface Hospital Albrechtsen Research Centre, Department of Physiology and Pathophysiology, Max Rady College of Medicine, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB R2H 2A6, Canada
| | - Naranjan S Dhalla
- Institute of Cardiovascular Sciences, St. Boniface Hospital Albrechtsen Research Centre, Department of Physiology and Pathophysiology, Max Rady College of Medicine, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB R2H 2A6, Canada.,Institute of Cardiovascular Sciences, St. Boniface Hospital Albrechtsen Research Centre, Department of Physiology and Pathophysiology, Max Rady College of Medicine, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB R2H 2A6, Canada
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12
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Abstract
Cardiolipin (CL), a phospholipid found in the inner mitochondrial membrane in all cell types, is critical for the function of the electron transport chain. The role of CL is not fully understood, but it is assumed that the molecule maintains membrane potential and architecture and compensates for alterations in homeostasis that could affect the energy metabolism. The objective of this project was to determine the effects of increasing CL concentrations on angiogenic sprouting by using the aortic ring assay model. For this, 5-day-old C57Bl/6 pups were euthanized by cervical dislocation prior to removal of the aortas. The vessels were cleaned, cut in 0.5 mm wide rings, and placed in a collagen growth matrix supplemented with CL. The results revealed a highly significant reduction of sprout growth (both length and quantity) at low, physiological concentrations. In conclusion, the results of this study demonstrate that CL significantly reduces microvessel formation and that it could potentially provide an interesting novel therapeutic target for angiogenesis.
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Affiliation(s)
- Matthew L Carnevale
- Department of Exercise Science, Concordia University, 7141 Sherbrooke Street West, Montréal, QC H4B 1R6, Canada.,Department of Exercise Science, Concordia University, 7141 Sherbrooke Street West, Montréal, QC H4B 1R6, Canada
| | - Andreas Bergdahl
- Department of Exercise Science, Concordia University, 7141 Sherbrooke Street West, Montréal, QC H4B 1R6, Canada.,Department of Exercise Science, Concordia University, 7141 Sherbrooke Street West, Montréal, QC H4B 1R6, Canada
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13
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Abstract
Histone deacetylases (HDACs) regulate gene transcription by modifying the acetylation of histone and nonhistone proteins. Deregulated expression of HDACs has been implicated in tumorigenesis and angiogenesis. In this study, we examined the effect of suberoylanilide hydroxamic acid (SAHA), a potent inhibitor of HDACs, on inflammatory corneal angiogenesis. In a mouse model of alkali-induced corneal neovascularization (CNV), topical application of SAHA to the injured corneas attenuated CNV. In addition, in vivo treatment with SAHA downregulated the expression of the pro-angiogenic factors vascular endothelial growth factor (VEGF), basic fibroblast growth factor (bFGF), transforming growth factor beta 1 (TGFβ1), and epidermal growth factor (EGF), but upregulated the expression of the anti-angiogenic factors thrombospondin (TSP)-1, TSP-2, and ADAMTS-1 in the injured corneas. Furthermore, SAHA inhibited the expression of pro-angiogenic factors, migration, proliferation, and tube formation by human microvascular endothelial cells (HEMC-1) in vitro. These data indicate that SAHA has therapeutic potential for CNV.
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Affiliation(s)
- Hongyan Zhou
- a The State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Sun Yat-sen University, 54 S Xianlie Road, Guangzhou 510060, China
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14
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Abstract
Since sexual disorders were not specifically studied in the principal series, epidemiological data is scarce. Nevertheless, in practice, when sexuality is dealt with during the monitoring of patients undergoing targeted therapies, more than half of the patients questioned say that they attach importance to their quality of sex life, despite the severity of their metastatic renal cancer. At the start of treatment, it is therefore important to inform patients of the possible occurrence of problems and to encourage them to report them. During treatment, screening for sexual disorders by questioning is desirable: desire, lubrication, dyspareunia, erectile dysfunction. In the event of the onset of a sexual disorder during treatment, it is not usually necessary to stop or modify the treatment. Therapeutic measures depend on the discomfort felt and are under the control of the specialist: erectile dysfunction, male libido disorders, vaginal dryness and vulvovaginitis. A consultation with an oncology psychologist and/or sex therapist is useful, if possible with the partner, based on the impact of the sexual problems.
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