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Ischemia angiogenesis

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https://www.readbyqxmd.com/read/28216514/diallyl-trisulfide-augments-ischemia-induced-angiogenesis-via-an-endothelial-nitric-oxide-synthase-dependent-mechanism
#1
Ryo Hayashida, Kazuhisa Kondo, Sumio Morita, Kazumasa Unno, Satoshi Shintani, Yuuki Shimizu, John W Calvert, Rei Shibata, Toyoaki Murohara
BACKGROUND: Hydrogen sulfide (H2S) exerts beneficial actions against the development of cardiovascular disease. Diallyl trisulfide (DATS) is an organic polysulfide found in garlic oil that liberates H2S under physiological conditions. This study investigated whether DATS modulates endothelial cell function, as well as revascularization processes in a mouse model of hind-limb ischemia.Methods and Results:Wild-type (WT), endothelial nitric oxide synthase-deficient (eNOS-KO) and Akt1-heterogenic deficient (Akt-Het) mice were subjected to unilateral hindlimb ischemia (HLI)...
February 17, 2017: Circulation Journal: Official Journal of the Japanese Circulation Society
https://www.readbyqxmd.com/read/28213570/blunted-transcriptional-response-to-skeletal-muscle-ischemia-in-rats-with-chronic-kidney-disease-potential-role-for-impaired-ischemia-induced-angiogenesis
#2
Rafael U Heiss, Fabian Fahlbusch, Johannes Jacobi, Christoph Daniel, Arif B Ekici, Nada Cordasic, Kerstin Amann, Andrea Hartner, Karl F Hilgers
Chronic kidney disease (CKD) is associated with increased cardiovascular morbidity and mortality. Previous studies indicated an impairment of ischemia-induced angiogenesis in skeletal muscle of rats with CKD. We performed a systematic comparison of early gene expression in response to ischemia in rats with or without CKD to identify potential molecular mechanisms underlying impaired angiogenesis in CKD. CKD was induced in male rats by 5/6 nephrectomy (SNX); control rats were sham operated (sham). Eight weeks later, ischemia of the right limb was induced by ligation and resection of the femoral artery...
February 17, 2017: Physiological Genomics
https://www.readbyqxmd.com/read/28207177/quaking-is-a-key-regulator-of-endothelial-cell-differentiation-neovascularization-and-angiogenesis
#3
Amy Cochrane, Sophia Kelaini, Marianna Tsifaki, James Bojdo, Marta Vilà-González, Daiana Drehmer, Rachel Caines, Corey Magee, Magdalini Eleftheriadou, Yanhua Hu, David Grieve, Alan W Stitt, Lingfang Zeng, Qingbo Xu, Andriana Margariti
The capability to derive endothelial cell (ECs) from induced Pluripotent Stem (iPS) cells holds huge therapeutic potential for cardiovascular disease. Objective- This study elucidates the precise role of the RNA-binding protein Quaking isoform 5 (QKI-5) during EC differentiation from both mouse and human iPS cells and dissects how RNA-binding proteins can improve differentiation efficiency towards cell therapy for important vascular diseases. iPS cells represent an attractive cellular approach for regenerative medicine today since they can be used to generate patient-specific therapeutic cells towards autologous cell therapy...
February 16, 2017: Stem Cells
https://www.readbyqxmd.com/read/28195185/microglia-preconditioned-by-oxygen-glucose-deprivation-promote-functional-recovery-in-ischemic-rats
#4
Masato Kanazawa, Minami Miura, Masafumi Toriyabe, Misaki Koyama, Masahiro Hatakeyama, Masanori Ishikawa, Takashi Nakajima, Osamu Onodera, Tetsuya Takahashi, Masatoyo Nishizawa, Takayoshi Shimohata
Cell-therapies that invoke pleiotropic mechanisms may facilitate functional recovery in stroke patients. We hypothesized that a cell therapy using microglia preconditioned by optimal oxygen-glucose deprivation (OGD) is a therapeutic strategy for ischemic stroke because optimal ischemia induces anti-inflammatory M2 microglia. We first delineated changes in angiogenesis and axonal outgrowth in the ischemic cortex using rats. We found that slight angiogenesis without axonal outgrowth were activated at the border area within the ischemic core from 7 to 14 days after ischemia...
February 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28187520/exogenous-vegf-delivery-prior-to-endothelial-precursor-cell-transplantation-in-orthotopic-liver-transplant-induced-hepatic-ischemia-reperfusion-injury
#5
Ding Cao, Menghao Wang, Junhua Gong, Sidong Wei, Jianping Gong, Jinzheng Li
BACKGROUND: Vascular endothelial growth factor (VEGF) promotes angiogenesis in vivo. We hypothesized that exogenous delivery of VEGF prior to bone marrow-derived endothelial precursor cell (EPC) transplantation may improve orthotopic liver transplantation (OLT)-induced hepatic ischemia-reperfusion injury (HIRI). METHODS: OLT between Sprague Dawley donor rats and inbred LEW Wistar recipient rats was performed in six experimental groups to comparatively assess the effects of VEGF gene: an untreated normal control group, a surgical control group, a liposomal control group, a VEGF group receiving only the liposome-encapsulated VEGF plasmid, an EPC group receiving only EPCs, and an EPC+VEGF group receiving the liposome-encapsulated VEGF plasmid followed by EPCs...
February 10, 2017: Liver Transplantation
https://www.readbyqxmd.com/read/28177171/increased-survivability-of-ischemic-skin-flap-tissue-in-flk-1-mice-by-pellino-1-intervention
#6
Chandra K Rednam, Rickesha L Wilson, Vaithinathan Selvaraju, Muhammad T Rishi, Mahesh Thirunavukkarasu, Vladimir Coca-Soliz, Rajesh Lakshmanan, J Alexander Palesty, David W McFadden, Nilanjana Maulik
OBJECTIVE: Reduced skin flap survival due to ischemia is a serious concern during reconstructive cosmetic surgery. The absence of vascular endothelial growth factor (VEGF) and its receptors during ischemia may lead to flap failure. We identified Pellino-1 (Peli1), a 46-kDa protein, as a proangiogenic molecule and is directly regulated by VEGF. Therefore, we hypothesized that Peli1 acts downstream of Flk-1/VEGFR2 and aids in skin flap survival during ischemia. METHODS: Scratch and matrigel assays were performed to observe cell proliferation, migration and tube formation in vitro...
February 8, 2017: Microcirculation: the Official Journal of the Microcirculatory Society, Inc
https://www.readbyqxmd.com/read/28174322/4d-microvascular-analysis-reveals-that-regenerative-angiogenesis-in-ischemic-muscle-produces-a-flawed-microcirculation
#7
John-Michael Arpino, Zengxuan Nong, Fuyan Li, Hao Yin, Nour W Ghonaim, Stephanie Milkovich, Brittany Balint, Caroline O'Neil, Graham M Fraser, Daniel Goldman, Christopher G Ellis, J G Pickering
RATIONALE: Angiogenesis occurs following ischemic injury to skeletal muscle and enhancing this response has been a therapeutic goal. However, to appropriately deliver oxygen, a precisely organized and exquisitely responsive microcirculation must form. Whether these network attributes exist in a regenerated microcirculation is unknown and methodologies for answering this have been lacking. OBJECTIVE: To develop 4D methodologies for elucidating microarchitecture and function of the reconstructed microcirculation in skeletal muscle...
February 7, 2017: Circulation Research
https://www.readbyqxmd.com/read/28167815/protective-effects-of-ischemic-preconditioning-mediated-homing-of-endothelial-progenitor-cells-on-renal-acute-ischemia-and-reperfusion-injury-in-male-rats
#8
Jianxin Xue, Zhiqiang Qin, Xiao Li, Pu Cao, Ruipeng Jia
BACKGROUND The objective of this study was to determine whether homing of endothelial progenitor cells (EPCs) induced by ischemic preconditioning (IPC) contributed to the protection of renal acute ischemia-reperfusion injury (IRI) in male rats. MATERIAL AND METHODS Forty male Sprague-Dawley rats were randomly divided into four groups, including sham-operated group, IRI-operated group, IPC-treated group and EPCs-treated group. Subsequently, serum samples were collected at 24 and 72 hours after reperfusion, respectively...
February 7, 2017: Annals of Transplantation: Quarterly of the Polish Transplantation Society
https://www.readbyqxmd.com/read/28167285/nanoparticular-delivery-system-for-a-secretoneurin-derivative-induces-angiogenesis-in-a-hind-limb-ischemia-model
#9
Karin Albrecht-Schgoer, Jan Barthelmes, Wilfried Schgoer, Markus Theurl, Isabelle Nardin, Daniela Lener, Clemens Gutmann, Sarah Dünnhaupt, Andreas Bernkop-Schnürch, Rudolf Kirchmair
Common therapeutic strategies for peripheral arterial disease often fail to re-establish sufficient blood flow within legs and feet of patients for avoiding critical limb ischemia, what is characterized by a substantial risk for amputation. The neuropeptide secretoneurin induces angiogenesis in models of limb and myocardial ischemia and might be a promising tool in the treatment of patients without the option of revascularization therapy for severe ischemia. Within this manuscript, the biologically active part of secretoneurin was identified, modified by induction of a cysteine residue to gain higher stability against enzymatic degradation and further packed into S-protected thiolated chitosan nanoparticles, which enable intra-muscular application of secretoneurin...
February 3, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28163069/adipose-derived-stem-cells-protect-skin-flaps-against-ischemia-reperfusion-injury-via-interleukin-6-expression
#10
Chi-Ming Pu, Chen-Wei Liu, Chan-Jung Liang, Yu-Hsiu Yen, Shun-Hua Chen, Ya-Fen Jiang-Shieh, Chung-Liang Chien, Ya-Chun Chen, Yuh-Lien Chen
Flap necrosis is the most frequent postoperative complication encountered in reconstructive surgery. We elucidated whether adipose-derived stem cells (ADSCs) and their derivatives might induce neovascularization and protect skin flaps during ischemia/reperfusion (I/R) injury. Flaps were subjected to 3 h of ischemia by ligating long thoracic vessels and then to blood reperfusion. Q-tracker-labeled ADSCs, conditioned media (ADSC-CM), or exosomes (ADSC-Exo) were injected into the flaps. These treatments led to significantly increase flap survival and capillary density compared to I/R on postoperative day 5...
February 2, 2017: Journal of Investigative Dermatology
https://www.readbyqxmd.com/read/28155611/galectins-a-potential-target-for-cardiovascular-therapy
#11
Ghulam Md Ashraf, Asma Perveen, Syed Kashif Zaidi, Ausaf Ahmad, Shazi Shakil, Chelapram Kandy Firoz, Nasimudeen R Jabir, Iftekhar Hassan, Taqi Ahmad Khan, Nagendra Sastry Yarla, Shams Tabrez
Cells constantly adapt to external humoral cues like cytokines and hormones, but practically most cellular behavior is under locally guided control via cell-cell interactions. Galectins (Gals) are one of the most prominent members of the group of molecules involved in this intercellular signaling. They are the family of β-galactoside specific lectins and consist of 15 different types, each with a specific function. They play crucial role in the immune system, inflammation, wound healing and carcinogenesis...
February 1, 2017: Current Vascular Pharmacology
https://www.readbyqxmd.com/read/28150462/tongxinluo-exerts-protective-effects-via-anti-apoptotic-and-pro-autophagic-mechanisms-by-activating-ampk-pathway-in-infarcted-rat-hearts
#12
Qing Li, Na Li, He-He Cui, Xia-Qiu Tian, Chen Jin, Gui-Hao Chen, Yue-Jin Yang
Tongxinluo (TXL) has been demonstrated to have a protective role during ischemia/reperfusion after acute myocardial infarction (AMI), but the long-term effects and the underlying mechanisms are still unknown. This study aimed to investigate whether TXL could have an effect on apoptosis or autophagy of cardiomyocytes through the AMP-activated protein kinase (AMPK) pathway. Male, Sprague-Dawley rats (n = 75) were randomly divided to sham, control, TXL (4 mg kg(-1)  d(-1) orally), compound C (intraperitoneal injection at 10 mg kg(-1)  d(-1) ), and TXL + compound C groups...
February 1, 2017: Experimental Physiology
https://www.readbyqxmd.com/read/28133976/gene-based-therapies-in-patients-with-critical-limb-ischemia
#13
Panagiotis Kitrou, Dimitris Karnabatidis, Elias Brountzos, Konstantinos Katsanos, Lazaros Reppas, Stavros Spiliopoulos
Critical limb ischemia (CLI) constitutes a life-limiting and life-threatening disease. Revascularization, either endovascular or surgical, remains the best treatment option accompanied by medication and risk factor modification. Patients unable to undergo revascularization, referred as "no-option patients", have been the center of interest the last few years, subjected to treatment therapies based on proteins (mainly growth factors) involved in angiogenesis via gene delivery to the ischemic tissue. Areas Covered: This review focuses on these growth factors, gives an update of the studies available, discusses the possible problems that influence outcomes and describes future perspectives including possible new technologies that will improve them...
January 28, 2017: Expert Opinion on Biological Therapy
https://www.readbyqxmd.com/read/28133527/time-course-of-neuroprotection-induced-by-in-vivo-normobaric-hyperoxia-preconditioning-and-angiogenesis-factors
#14
Meisam Shahhoseini, Mohammad Reza Bigdeli
OBJECTIVES: Every year, a large number of people lose their lives due to stroke. Stroke is the second leading cause of death worldwide. Surprisingly, recent studies have shown that preconditioning with hyperoxia (HO) increases tissue tolerance to ischemia, ultimately reducing damages caused by stroke. Addressed in this study are beneficial contributions from HO preconditioning into reduced harm to be incurred by the attack, as well as its effect on the expression levels of vascular endothelial growth factor (VEGF) and endostatin...
January 2017: Iranian Journal of Basic Medical Sciences
https://www.readbyqxmd.com/read/28123421/effect-of-ephrin-b2-on-the-expressions-of-angiopoietin-1-and-2-after-focal-cerebral-ischemia-reperfusion
#15
Hui Xiao, Qing Huang, Jia-Qi Wang, Qing-Qing Deng, Wen-Ping Gu
Ephrin-B2 has been shown to participate in angiogenesis, but the underlying mechanisms involved remain unclear. In this study, a rat model of focal cerebral ischemia was prepared by focal middle cerebral artery occlusion, followed by 24-hour reperfusion. Then, ephrin-B2 protein was administered intracerebroventricularly for 3 consecutive days via a micro-osmotic pump. Western blot assay and quantitative real-time reverse transcription PCR demonstrated the expression levels of angiopoietin-1 (Ang-1) mRNA and protein in the penumbra cortex of the ephrin-B2 treated group were decreased at day 4 after reperfusion, and increased at day 28, while the expression levels of angiopoietin-2 (Ang-2) were highly up-regulated at all time points tested...
November 2016: Neural Regeneration Research
https://www.readbyqxmd.com/read/28123169/pathophysiology-of-intermittent-claudication-in-peripheral-artery-disease
#16
Naomi M Hamburg, Mark A Creager
Peripheral artery disease (PAD) affects more than 200 million adults worldwide. Patients with lower extremity PAD have a heightened risk for cardiovascular events because of the systemic nature of atherosclerosis, and benefit from treatment with risk factor-modifying therapies. Limb symptoms in PAD include intermittent claudication and diminished walking ability. Arterial obstruction from atherosclerotic lesions initiates limb ischemia; however, decreased perfusion incompletely determines the clinical expression of PAD and its response to therapy...
January 26, 2017: Circulation Journal: Official Journal of the Japanese Circulation Society
https://www.readbyqxmd.com/read/28118600/tmem2-regulates-embryonic-vegf-signaling-by-controlling-hyaluronic-acid-turnover
#17
Jessica E De Angelis, Anne K Lagendijk, Huijun Chen, Alisha Tromp, Neil I Bower, Kathryn A Tunny, Andrew J Brooks, Jeroen Bakkers, Mathias Francois, Alpha S Yap, Cas Simons, Carol Wicking, Benjamin M Hogan, Kelly A Smith
Angiogenesis is responsible for tissue vascularization during development, as well as in pathological contexts, including cancer and ischemia. Vascular endothelial growth factors (VEGFs) regulate angiogenesis by acting through VEGF receptors to induce endothelial cell signaling. VEGF is processed in the extracellular matrix (ECM), but the complexity of ECM control of VEGF signaling and angiogenesis remains far from understood. In a forward genetic screen, we identified angiogenesis defects in tmem2 zebrafish mutants that lack both arterial and venous Vegf/Vegfr/Erk signaling...
January 23, 2017: Developmental Cell
https://www.readbyqxmd.com/read/28109110/-effects-of-polyethylene-oxide-on-blood-perfusion-in-the-hind-limbs-of-rats-with-chronic-hindlimb-ischemia
#18
De-Zhong Zheng, Tao Zhou, Dao-Gang Zha
OBJECTIVE: To evaluate the effects of polyethylene oxide (PEO) on blood perfusion in hind limb skeletal muscles in a rat model of chronic hind limb ischemia. METHDOS: Twelve rat models of chronic hind limb ischemia established by unilateral femoral artery ligation were randomized into PEO and control groups (n=6) and treated with intravenous infusion of PEO and saline through the internal jugular vein every other day for 2 weeks. Contrast-enhanced ultrasonography was performed after the treatments to evaluate the blood flow in the skeletal muscles at different time points and blood flow reserve in the ischemic hind limbs on day 28...
January 20, 2017: Nan Fang Yi Ke da Xue Xue Bao, Journal of Southern Medical University
https://www.readbyqxmd.com/read/28106731/hypoxia-inducible-factor-1%C3%AE-promotes-endogenous-adaptive-response-in-rat-model-of-chronic-cerebral-hypoperfusion
#19
Ying Yang, Jieyang Ju, Min Deng, Jing Wang, Hui Liu, Li Xiong, Junjian Zhang
Hypoxia inducible factor 1α (HIF-1α), a pivotal regulator of gene expression in response to hypoxia and ischemia, is now considered to regulate both pro-survival and pro-death responses depending on the duration and severity of the stress. We previously showed that chronic global cerebral hypoperfusion (CCH) triggered long-lasting accumulation of HIF-1α protein in the hippocampus of rats. However, the role of the stabilized HIF-1α in CCH is obscure. Here, we knock down endogenous HIF-1α to determine whether and how HIF-1α affects the disease processes and phenotypes of CCH...
January 17, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28104567/cardiovascular-toxicity-of-angiogenesis-inhibitors-in-treatment-of-malignancy-a-systematic-review-and-meta-analysis
#20
REVIEW
Husam Abdel-Qadir, Josee-Lyne Ethier, Douglas S Lee, Paaladinesh Thavendiranathan, Eitan Amir
BACKGROUND: The cardiovascular risk of angiogenesis inhibitors is not well-quantified. We hypothesized that, compared to direct vascular endothelial growth factor (VEGF) inhibitors (anti-VEGF antibodies or decoy receptors), small molecule agents have higher risk due to their less specific mechanism. METHODS: We searched the MEDLINE, EMBASE, and Cochrane Central Register of Controlled Trials for phase III randomised controlled trials comparing angiogenesis inhibitor-based therapy to other systemic therapy...
February 2017: Cancer Treatment Reviews
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