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Hind limb ischemia

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https://www.readbyqxmd.com/read/28109110/-effects-of-polyethylene-oxide-on-blood-perfusion-in-the-hind-limbs-of-rats-with-chronic-hindlimb-ischemia
#1
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/28095625/potentiation-of-biological-effects-of-mesenchymal-stem-cells-in-ischemic-conditions-by-melatonin-via-upregulation-of-cellular-prion-protein-expression
#2
Jun Hee Lee, Yong-Seok Han, Sang Hun Lee
Mesenchymal stem cells (MSCs) are promising candidates for stem cell-based therapy in ischemic diseases. However, ischemic injury induces pathophysiological conditions, such as oxidative stress and inflammation, which diminish therapeutic efficacy of MSC-based therapy by reducing survival and functionality of transplanted MSCs. To overcome this problem, we explored the effects of melatonin on the proliferation, resistance to oxidative stress, and immunomodulatory properties of MSCs. Treatment with melatonin enhanced MSC proliferation and self-renewal via upregulation of cellular prion protein (PrP(C) ) expression...
January 17, 2017: Journal of Pineal Research
https://www.readbyqxmd.com/read/28053524/dynamic-imaging-of-allogeneic-adipose-derived-regenerative-cells-transplanted-in-ischemic-hind-limb-of-apolipoprotein-e-mouse-model
#3
Yi Zheng, Jinbao Qin, Xin Wang, Zhiyou Peng, Peiyong Hou, Xinwu Lu
BACKGROUND: Transplantation of allogeneic adipose-derived regenerative cells (ADRCs) is a promising treatment modality for severe ischemic diseases. However, minimal information is available on the in vivo effects, fate, and migration of ADRCs, as well as the mechanisms of their therapeutic angiogenesis. MATERIALS AND METHODS: In this study, green fluorescent protein-expressing ADRCs (GFP-ADRCs) were obtained, labeled with acetylated 3-aminopropyltrimethoxysilane (APTS)-coated iron oxide nanoparticles (APTS NPs), and injected into an old apolipoprotein E knockout (ApoE-KO) mouse model with hind limb ischemia...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28042553/remote-ischemic-preconditioning-enhances-the-expression-of-genes-encoding-antioxidant-enzymes-and-endoplasmic-reticulum-stress-related-proteins-in-rat-skeletal-muscle
#4
Ui Jun Park, Hyoung Tae Kim, Won Hyun Cho, Jae Hyoung Park, Hye Ra Jung, Min Young Kim
PURPOSE: Ischemic preconditioning (IPC), including remote IPC (rIPC) and direct IPC (dIPC), is a promising method to decrease ischemia-reperfusion (IR) injury. This study tested the effect of both rIPC and dIPC on the genes for antioxidant enzymes and endoplasmic reticulum (ER) stress-related proteins. MATERIALS AND METHODS: Twenty rats were randomly divided into the control and study groups. In the control group (n=10), the right hind limb was sham-operated. The left hind limb (IscR) of the control group underwent IR injury without IPC...
December 2016: Vascular Specialist International
https://www.readbyqxmd.com/read/28024849/diminished-force-production-and-mitochondrial-respiratory-deficits-are-strain-dependent-myopathies-of-subacute-limb-ischemia
#5
Cameron A Schmidt, Terence E Ryan, Chien-Te Lin, Melissa M R Inigo, Tom D Green, Jeffrey J Brault, Espen E Spangenburg, Joseph M McClung
OBJECTIVE: Reduced skeletal muscle mitochondrial function might be a contributing mechanism to the myopathy and activity based limitations that typically plague patients with peripheral arterial disease (PAD). We hypothesized that mitochondrial dysfunction, myofiber atrophy, and muscle contractile deficits are inherently determined by the genetic background of regenerating ischemic mouse skeletal muscle, similar to how patient genetics affect the distribution of disease severity with clinical PAD...
December 23, 2016: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/28017783/anti-apoptotic-and-angiogenic-effects-of-intelectin-1-in-rat-cerebral-ischemia
#6
Naibing Gu, Yaru Dong, Ye Tian, Zhengli Di, Zhiqin Liu, Mingze Chang, Xiaotao Jia, Yihua Qian, Weiping Zhang
Ischemic stroke is an acute life-threatening disease, which causes neurological dysfunction. The formation of new blood vessels around the infarct is vital to the restoration of perfusion and healing of brain tissue. Studies have shown that intelectin-1 (omentin) promotes endothelial cell function and angiogenesis in response to ischemia and inhibits apoptosis in rats with unilateral hind limb surgery. In the present study, we investigated the neuroprotective role of intelectin-1 following focal cerebral ischemia...
December 23, 2016: Brain Research Bulletin
https://www.readbyqxmd.com/read/28006943/cardioprotection-induced-by-remote-ischemic-preconditioning-preserves-the-mitochondrial-respiratory-function-in-acute-diabetic-myocardium
#7
I Kancirová, M Jašová, M Muráriková, Z Sumbalová, O Uličná, T Ravingerová, I Waczulíková, A Ziegelhöffer, M Ferko
A 2×2 factorial design was used to evaluate possible preservation of mitochondrial functions in two cardioprotective experimental models, remote ischemic preconditioning and streptozotocin-induced diabetes mellitus, and their interaction during ischemia/reperfusion injury (I/R) of the heart. Male Wistar rats were randomly allocated into four groups: control (C), streptozotocin-induced diabetic (DM), preconditioned (RPC) and preconditioned streptozotocin-induced diabetic (DM+RPC). RPC was conducted by 3 cycles of 5-min hind-limb ischemia and 5-min reperfusion...
December 22, 2016: Physiological Research
https://www.readbyqxmd.com/read/27998712/impacts-of-femoral-artery-and-vein-excision-versus-femoral-artery-excision-on-the-hindlimb-ischemic-model-in-cd-1-mice
#8
Miao Chen, Huimin Fan, Benjamin T Ledford, Zayd Farah, Catherine Barron, Zhongmin Liu, Jia-Qiang He
BACKGROUND AND AIM: Although femoral artery ligation-induced ischemia is commonly used in C57BL/6 or Balb/c mice, direct comparisons between femoral artery/vein (FAV) versus femoral artery (FA) excisions have not been reported. The goal of the present study is to investigate the effects of FAV versus FA excisions on hindlimb models using adult CD-1 mice. METHODS: Two groups (n=10/group) of adult, mixed gender CD-1 mice were used to generate hindlimb ischemic models by excising either the FAV or FA...
December 18, 2016: Microvascular Research
https://www.readbyqxmd.com/read/27986757/cyanate-impaired-angiogenesis-association-with-poor-coronary-collateral-growth-in-patients-with-stable-angina-and-chronic-total-occlusion
#9
Jia Teng Sun, Ke Yang, Jing Yan Mao, Wei Feng Shen, Lin Lu, Qi Hong Wu, Yan Ping Wang, Li Ping Wu, Rui Yan Zhang
BACKGROUND: Cyanate has recently gained attention for its role in the pathogenesis of vascular injury. Nonetheless, the effect of cyanate on angiogenesis remains unclear. METHODS AND RESULTS: In this study, we demonstrated that oral administration of cyanate impaired blood perfusion recovery in a mouse hind-limb ischemia model. A reduction in blood perfusion recovery at day 21 was observed in the ischemic tissue of cyanate-treated mice. Likewise, there were fewer capillaries in the ischemic hind-limb tissue of cyanate-exposed mice...
December 16, 2016: Journal of the American Heart Association
https://www.readbyqxmd.com/read/27984781/simvastatin-augments-revascularization-and-reperfusion-in-a-murine-model-of-hind-limb-ischemia-multimodal-imaging-assessment
#10
Julian Luke Goggi, Michael Ng, Nalini Shenoy, Ramasamy Boominathan, Peter Cheng, Sakthivel Sekar, Kishore Kumar Bhakoo
INTRODUCTION: Peripheral artery disease can lead to severe disability and limb loss. Therapeutic strategies focussing on macrovascular repair have shown benefit but have not significantly reduced amputation rates in progressive PAD. Proangiogenic small molecule therapies may substantially improve vascularisation in limb ischemia. The purpose of the current study was to assess the proangiogenic effects of simvastatin in a murine model of hind limb ischemia using longitudinal multimodal imaging...
November 17, 2016: Nuclear Medicine and Biology
https://www.readbyqxmd.com/read/27941593/low-dose-sodium-nitrite-fluid-resuscitation-prevents-lethality-from-crush-syndrome-by-improving-nitric-oxide-consumption-and-preventing-myoglobin-cytotoxicity-in-kidney-in-a-rat-model
#11
Isamu Murata, Yumi Miyake, Naomi Takahashi, Ryuta Suzuki, Takayuki Fujiwara, Yuji Sato, Yutaka Inoe, Jun Kobayashi, Ikuo Kanamoto
OBJECTIVE: Crush syndrome (CS) is a serious medical condition characterized by muscle cell damage resulting from pressure. CS has a high mortality, even when patients receive fluid therapy. We examined whether administration of NaNO2-containing fluid can improve survival in a rat model of CS. DESIGN: The CS model was generated by subjecting anesthetized rats to bilateral hind limb compression with a rubber tourniquet for 5 h. Rats were then randomly divided into six groups: (i) sham; (ii) CS with no treatment; (iii) CS with normal saline treatment; (iv) CS with normal saline + 25 mEq/L bicarbonate treatment; and (v and vi) CS with normal saline + 200 or 500 μmol/kg NaNO2...
December 9, 2016: Shock
https://www.readbyqxmd.com/read/27930695/coordinated-activation-of-vegf-vegfr-2-and-ppar%C3%AE-pathways-by-a-multi-component-chinese-medicine-dhi-accelerated-recovery-from-peripheral-arterial-disease-in-type-2-diabetic-mice
#12
Shuang He, Tiechan Zhao, Hao Guo, Yanzhi Meng, Gangjian Qin, David A Goukassian, Jihong Han, Xuimei Gao, Yan Zhu
Diabetic mellitus (DM) patients are at an increased risk of developing peripheral arterial disease (PAD). Danhong injection (DHI) is a Chinese patent medicine widely used for several cardiovascular indications but the mechanism of action is not well-understood. We investigated the therapeutic potential of DHI on experimental PAD in mice with chemically induced as well as genetic (KKAy) type 2 DM and the overlapping signaling pathways regulating both therapeutic angiogenesis and glucose homeostasis. Compared with normal genetic background wild type (WT) mice, both DM mice showed impaired perfusion recovery in hind-limb ischemia (HLI) model...
2016: PloS One
https://www.readbyqxmd.com/read/27927598/hypoxia-inducible-factor-stabilization-improves-defective-ischemia-induced-angiogenesis-in-a-rodent-model-of-chronic-kidney-disease
#13
Isabel N Schellinger, Nada Cordasic, Julian Panesar, Björn Buchholz, Johannes Jacobi, Andrea Hartner, Bernd Klanke, Joanna Jakubiczka-Smorag, Nicolai Burzlaff, Eva Heinze, Christina Warnecke, Uwe Raaz, Carsten Willam, Philip S Tsao, Kai-Uwe Eckardt, Kerstin Amann, Karl F Hilgers
Chronic kidney disease (CKD) is associated with increased risk and worse prognosis of cardiovascular disease, including peripheral artery disease. An impaired angiogenic response to ischemia may contribute to poor outcomes of peripheral artery disease in patients with CKD. Hypoxia inducible factors (HIF) are master regulators of angiogenesis and therefore represent a promising target for therapeutic intervention. To test this we induced hind-limb ischemia in rats with CKD caused by 5/6 nephrectomy and administered two different treatments known to stabilize HIF protein in vivo: carbon monoxide and a pharmacological inhibitor of prolyl hydroxylation 2-(1-chloro-4- hydroxyisoquinoline-3-carboxamido) acetate (ICA)...
December 4, 2016: Kidney International
https://www.readbyqxmd.com/read/27888751/remote-ischemic-preconditioning-attenuates-egr-1-expression-following-myocardial-ischemia-reperfusion-injury-through-activation-of-the-jak-stat-pathway
#14
H Mudaliar, B Rayner, M Billah, N Kapoor, W Lay, A Dona, R Bhindi
BACKGROUND/OBJECTIVES: Remote ischemic preconditioning (RIPC) protects the myocardium from ischemia/reperfusion (I/R) injury however the molecular pathways involved in cardioprotection are yet to be fully delineated. Transcription factor Early growth response-1 (Egr-1) is a key upstream activator in a variety of cardiovascular diseases. In this study, we elucidated the role of RIPC in modulating the regulation of Egr-1. METHODS: This study subjected rats to transient blockade of the left anterior descending (LAD) coronary artery with or without prior RIPC of the hind-limb muscle and thereafter excised the heart 24h following surgical intervention...
February 1, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/27884329/saphenous-artery-based-flap-models-in-rats-new-flap-designs-for-experimental-studies
#15
Ersin Aksam, Berrak Aksam, Mustafa Erol Demirseren, Huban Sibel Orhun Yavuz
BACKGROUND: Experimental research using laboratory animals provides substantial data about reconstructive surgery. However, the literature does not include any experimental studies that have used flap models on the hind limbs of rats. To gain an understanding of the physiology of lower-extremity flaps and of flap failures, this study assessed the cutaneous perforators of the saphenous artery, and new flap models were designed for the hind limbs of rats. MATERIALS AND METHODS: The experiment was designed to include three stages and used 35 rats...
December 2016: Journal of Surgical Research
https://www.readbyqxmd.com/read/27883074/adipose-stem-cells-display-higher-regenerative-capacities-and-more-adaptable-electro-kinetic-properties-compared-to-bone-marrow-derived-mesenchymal-stromal-cells
#16
Ahmed El-Badawy, Marwa Amer, Reda Abdelbaset, Sameh N Sherif, Marwan Abo-Elela, Yehya H Ghallab, Hamdy Abdelhamid, Yehea Ismail, Nagwa El-Badri
Adipose stem cells (ASCs) have recently emerged as a more viable source for clinical applications, compared to bone-marrow mesenchymal stromal cells (BM-MSCs) because of their abundance and easy access. In this study we evaluated the regenerative potency of ASCs compared to BM-MSCs. Furthermore, we compared the dielectric and electro-kinetic properties of both types of cells using a novel Dielectrophoresis (DEP) microfluidic platform based on a printed circuit board (PCB) technology. Our data show that ASCs were more effective than BM-MSCs in promoting neovascularization in an animal model of hind-limb ischemia...
November 24, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27853962/enhanced-peripheral-dopamine-impairs-post-ischemic-healing-by-suppressing-angiotensin-receptor-type-1-expression-in-endothelial-cells-and-inhibiting-angiogenesis
#17
Chandrani Sarkar, Ramesh K Ganju, Vincent J Pompili, Debanjan Chakroborty
Increased circulating catecholamines have been linked with cardiovascular anomalies as well as with peripheral vascular diseases. Although the roles of epinephrine and norepinephrine have received considerable attention, the role of the other catecholamine, dopamine, has been less studied. Since dopamine is a potent endogenous inhibitor of angiogenesis and as angiogenesis is essential for ischemic healing, we therefore studied the role played by dopamine during ischemic healing using dopamine D2 receptor knockout (KOD2) mice...
November 16, 2016: Angiogenesis
https://www.readbyqxmd.com/read/27847966/therapeutic-potential-of-pro-angiogenic-bpc157-is-associated-with-vegfr2-activation-and-up-regulation
#18
Ming-Jer Hsieh, Hsien-Ta Liu, Chao-Nin Wang, Hsiu-Yun Huang, Yuling Lin, Yu-Shien Ko, Jong-Shyan Wang, Vincent Hung-Shu Chang, Jong-Hwei S Pang
: BPC 157, a pentadecapeptide with extensive healing effects, has recently been suggested to contribute to angiogenesis. However, the underlying mechanism is not yet clear. The present study aimed to explore the potential therapeutic effect and pro-angiogenic mechanism of BPC 157. As demonstrated by the chick chorioallantoic membrane (CAM) assay and endothelial tube formation assay, BPC 157 could increase the vessel density both in vivo and in vitro, respectively. BPC 157 could also accelerate the recovery of blood flow in the ischemic muscle of the rat hind limb as detected by laser Doppler scanning, indicating the promotion of angiogenesis...
November 15, 2016: Journal of Molecular Medicine: Official Organ of the "Gesellschaft Deutscher Naturforscher und Ärzte"
https://www.readbyqxmd.com/read/27834687/endothelial-scube2-interacts-with-vegfr2-and-regulates-vegf-induced-angiogenesis
#19
Yuh-Charn Lin, Tsu-Yi Chao, Chi-Tai Yeh, Steve R Roffler, Reiji Kannagi, Ruey-Bing Yang
OBJECTIVE: Vascular endothelial growth factor (VEGF), a major mediator of angiogenesis, exerts its proangiogenic action by binding to VEGFR2 (VEGF receptor 2), the activity of which is further modulated by VEGFR2 coreceptors such as neuropilins. However, whether VEGFR2 is regulated by additional coreceptors is not clear. To investigate whether SCUBE2 (signal peptide-CUB-EGF domain-containing protein 2), a peripheral membrane protein expressed in vascular endothelial cells (ECs) known to bind other signaling receptors, functions as a VEGFR2 coreceptor and to verify the role of SCUBE2 in the VEGF-induced angiogenesis...
January 2017: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/27793521/cardioprotection-by-remote-ischemic-preconditioning-is-blocked-in-the-aged-rat-heart-in-vivo
#20
Friederike Behmenburg, André Heinen, Lilli Vom Bruch, Markus W Hollmann, Ragnar Huhn
OBJECTIVES: In animal studies, remote ischemic preconditioning (RIPC) is a powerful tool to protect the heart from ischemia and reperfusion injury. Unfortunately, this effect was not seen consistently in recent large clinical trials. Aging was shown to be a confounding factor for the effect of direct preconditioning in experimental studies, but whether aging also can influence the effect of RIPC and thus be responsible for the contradictory clinical effect is unknown. The aim of this study was to investigate whether the cardioprotective effect of RIPC was abolished by aging...
July 7, 2016: Journal of Cardiothoracic and Vascular Anesthesia
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