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Ischemia angiogenesis

Dongkyu Kim, Sook Hee Ku, Hyosuk Kim, Ji Hoon Jeong, Minhyung Lee, Ick Chan Kwon, Donghoon Choi, Sun Hwa Kim
Gene therapy is aimed at selectively knocking up or knocking down the target genes involved in the development of diseases. In many human diseases, dysregulation of disease-associated genes is occurred concurrently: some genes are abnormally turned up and some are turned down. In the field of non-viral gene therapy, plasmid DNA (pDNA) and small interfering RNA (siRNA) are suggested as representative regulation tools for activating and silencing the expression of genes of interest, representatively. Herein, we simultaneously loaded both siRNA (Src homology region 2 domain-containing tyrosine phosphatase-1 siRNA, siSHP-1) for anti-apoptosis and pDNA (hypoxia-inducible vascular endothelial growth factor expression vector, pHI-VEGF) for angiogenesis in a single polymeric nanocarrier and used to synergistically attenuate ischemia-reperfusion (IR)-induced myocardial infarction, which is mainly caused by dysregulating of cardiac apoptosis and angiogenesis...
October 17, 2016: Journal of Controlled Release: Official Journal of the Controlled Release Society
Nicolas Marinval, Pierre Saboural, Oualid Haddad, Murielle Maire, Kevin Bassand, Frederic Geinguenaud, Nadia Djaker, Khadija Ben Akrout, Marc Lamy de la Chapelle, Romain Robert, Olivier Oudar, Erwan Guyot, Christelle Laguillier-Morizot, Angela Sutton, Cedric Chauvierre, Frederic Chaubet, Nathalie Charnaux, Hanna Hlawaty
Herein we investigate the structure/function relationships of fucoidans from Ascophyllum nodosum to analyze their pro-angiogenic effect and cellular uptake in native and glycosaminoglycan-free (GAG-free) human endothelial cells (HUVECs). Fucoidans are marine sulfated polysaccharides, which act as glycosaminoglycans mimetics. We hypothesized that the size and sulfation rate of fucoidans influence their ability to induce pro-angiogenic processes independently of GAGs. We collected two fractions of fucoidans, Low and Medium Molecular Weight Fucoidan (LMWF and MMWF, respectively) by size exclusion chromatography and characterized their composition (sulfate, fucose and uronic acid) by colorimetric measurement and Raman and FT-IR spectroscopy...
October 17, 2016: Marine Drugs
Sebastian Kwiatkowski, Barbara Dołęgowska, Ewa Kwiatkowska, Rafał Rzepka, Andrzej Torbè, Magdalena Bednarek-Jędrzejek
Preeclampsia and intrauterine growth restriction are two separate disease entities that, according to numerous reports, share the same pathogenesis. In both, angiogenesis disorders and generalized inflammation are the dominant symptoms. In this study, we hypothesized that both diseases demonstrate the same profile in early preeclampsia, late preeclampsia, and intrauterine growth restriction patients, with the only difference being the degree of exacerbation of lesions. One hundred sixty-seven patients were enrolled in the study and divided into four groups: early preeclampsia, late preeclampsia, and intrauterine growth restriction groups, and one control group...
2016: PloS One
Nicola Maurea, Paolo Spallarossa, Christian Cadeddu, Rosalinda Madonna, Donato Mele, Ines Monte, Giuseppina Novo, Pasquale Pagliaro, Alessia Pepe, Carlo G Tocchetti, Concetta Zito, Giuseppe Mercuro
The US National Cancer Institute estimates that cardiotoxicity (CTX) from target therapy refers mostly to four groups of drugs: epidermal growth factor receptor 2 inhibitors, angiogenic inhibitors, directed Abelson murine leukemia viral oncogene homolog inhibitors, and proteasome inhibitors. The main cardiotoxic side-effects related to antiepidermal growth factor receptor 2 therapy are left ventricular systolic dysfunction and heart failure. Angiogenesis inhibitors are associated with hypertension, left ventricular dysfunction/heart failure, myocardial ischemia, QT prolongation, and thrombosis...
May 2016: Journal of Cardiovascular Medicine
Nicola Maurea, Carmela Coppola, Giovanna Piscopo, Francesca Galletta, Gennaro Riccio, Emanuela Esposito, Claudia De Lorenzo, Michelino De Laurentiis, Paolo Spallarossa, Giuseppe Mercuro
The progress in cancer therapy and the increase in number of long-term survivors reveal the issue of cardiovascular side-effects of anticancer drugs. Cardiotoxicity has become a significant problem, and the risks of adverse cardiac events induced by systemic drugs need to be seriously considered. Potential cardiovascular toxicities linked to anticancer agents include arrhythmias, myocardial ischemia and infarction, hypertension, thromboembolism, left ventricular dysfunction, and heart failure. It has been shown that several anticancer drugs seriously affect the cardiovascular system, such as ErbB2 inhibitors, vascular endothelial growth factor (VEGF) inhibitors, multitargeted kinase inhibitors, Abelson murine leukemia viral oncogene homolog inhibitors, and others...
May 2016: Journal of Cardiovascular Medicine
Yuen Ting Lam, Laura Lecce, Joanne T M Tan, Christina A Bursill, David J Handelsman, Martin K C Ng
Increasing evidence indicates that androgens regulate ischemia-induced neovascularization. However, the role of genomic androgen action mediated by androgen receptor (AR), a ligand-activated nuclear transcription factor, remains poorly understood. Using an AR knockout mouse strain that contains a transcriptionally inactive AR (AR(Δex3)KO), we examined the role of AR genomic function in modulating androgen-mediated augmentation of ischemia-induced neovascularization. Castrated wildtype (AR(WT)) and AR(Δex3)KO mice were implanted with dihydrotestosterone (DHT) or placebo pellets following hindlimb ischemia (HLI)...
October 18, 2016: Endocrinology
Sophie Richard, Véronique Eder, Gianvito Caputo, Clément Journé, Phalla Ou, Julie Bolley, Liliane Louedec, Erwann Guenin, Laurence Motte, Nicola Pinna, Yoann Lalatonne
AIM: Tunable size ultrasmall superparamagnetic iron oxide (USPIO) nanoparticles from 3 to 9 nm coated with polyethylene glycol phosphonate moieties have been designed for neovascularization MRI. MATERIALS & METHODS: USPIO were synthesized using a nonaqueous sol-gel method. An ischemia-reperfusion rat model has been chosen for neo-angiogenesis and scanned on MRI after injection of different sized USPIO. Histological studies have been performed for USPIO localization within the tissue...
October 14, 2016: Nanomedicine
Konstantin Schwarz, Satnam Singh, Satish Kumar Parasuraman, Maggie Bruce, Lee Shepstone, Martin Feelisch, Magdalena Minnion, Shakil Ahmad, John Horowitz, Dana K Dawson, Michael P Frenneaux
In an aging western population, a significant number of patients continue to suffer from angina once all revascularization and optimal medical treatment options are exhausted. Under experimental conditions, oral supplementation with inorganic nitrate was shown to exhibit a blood pressure-lowering effect, and has also been shown to promote angiogenesis, improve endothelial dysfunction and mitochondrial efficiency in skeletal muscle. It is unknown whether similar changes occur in cardiac muscle. In the current study, we investigate whether oral sodium nitrate treatment will improve myocardial ischemia in patients with stable angina...
October 12, 2016: Future Cardiology
Zhao-Yang Lu, Rui-Lin Li, Hong-Sheng Zhou, Jing-Juan Huang, Zhi-Xiao Su, Jia Qi, Lan Zhang, Yue Li, Yi-Qin Shi, Chang-Ning Hao, Jun-Li Duan
Therapeutic ultrasound (TUS) has been demonstrated to improve endothelial nitric oxide synthase (eNOS) activity, which played a crucial role in the regulation of angiogenesis. Diabetes Mellitus (DM) impairs eNOS activity. We tested the hypothesis that DM may retard unilateral hindlimb ischemia-induced angiogenesis by inhibiting eNOS in high-fat diet (HFD)/streptozocin (STZ) induced diabetic mice, and that TUS may reverse DM-related impairment of angiogenesis. C57BL/6 mice were allocated to four groups: (A) mice were fed standard diet (control); (B) mice were fed standard diet and treated with TUS (control+TUS); (C) type-2 DM mice were induced by HFD/STZ (diabetic); and (D) type-2 DM mice and treated with TUS (dabetic+TUS)...
2016: American Journal of Translational Research
Somayeh Tavana, Mahnaz Azarnia, Mojtaba Rezazadeh Valojerdi, Abdolhossein Shahverdi
One of the problems encountered during ovarian transplantation is that the number of primordial follicles in the grafts is considerably reduced 2 d after transplantation due to post-transplantation ischemia. This study investigates if the use of hyaluronic acid-based hydrogel (HABH) with and without vascular endothelial growth factor (VEGF) and basic fibroblast growth factor (bFGF) could prevent or minimize ischemia-induced follicle loss during ovarian autotransplantation and thereby restore ovarian tissue function in the rat model...
October 6, 2016: Biomedical Materials
Can Tepeköylü, Daniela Lobenwein, Anja Urbschat, Michael Graber, Elisabeth Judith Pechriggl, Helga Fritsch, Patrick Paulus, Michael Grimm, Johannes Holfeld
BACKGROUND: Shock wave therapy (SWT) has been shown to induce angiogenesis in ischemic muscle. However, the mechanism of action remains unknown. Macrophages are crucial for angiogenic responses after ischemic injury. The M2 macrophage subset enables tissue repair and induces angiogenesis. We hypothesized that the angiogenic effects of SWT are at least partly caused by enhanced macrophage recruitment. METHODS: C57BL/6 mice were subjected to hind limb ischemia with subsequent SWT or sham treatment...
September 30, 2016: Journal of Tissue Engineering and Regenerative Medicine
Li Lv, Qian Lu, Fangyu Shao, Weiping Li, Qin Zhou, Jihong Wang, Qingwei Li
rLj-RGD3 is a 14.5 kDa recombinant protein with 3 RGD (Arg-Gly-Asp) motifs from the salivary gland secretions of Lampetra japonica, which is a histidine-rich and arginine-rich protein. Previous reports indicated that rLj-RGD3 has typical functions of RGD-toxin protein, such as platelet aggregation suppression tumour metastasis and angiogenesis inhibition. Because histidine and arginine have cerebral ischemia-reperfusion and neuroprotective functions, we investigated whether rLj-RGD3 has such activities and studied the mechanism...
2016: BioMed Research International
Carlo M Oranges, Mathias Tremp, Barbara Ling, Reto Wettstein, René D Largo, Dirk J Schaefer
External volume expansion of the recipient site by suction has been proposed as a way of improving fat graft survival. The objective of this study was to present an innovative and simple intraoperative external expansion system to enhance small-volume autologous fat grafting (40-80 mL) and to discuss its background and its mechanism of action. In this system, expansion is performed using a complete vacuum delivery system known as the Kiwi VAC-6000M with a PalmPump (Clinical Innovations). The recipient site is rapidly expanded intraoperatively 10 times for 30 seconds each with a negative pressure of up to 550 mm Hg before autologous fat injection...
September 2016: Archives of Plastic Surgery
Wenduo Gu, Xuechong Hong, Claire Potter, Aijuan Qu, Qingbo Xu
In recent years mesenchymal stem cells (MSCs) have emerged as a promising therapeutic cell type in regenerative medicine. They hold great promise for treating cardiovascular diseases, such as myocardial infarction and limb ischemia. MSCs may be utilized in both cell-based therapy and vascular graft engineering to restore vascular function, thereby providing therapeutic benefits to patients. The efficacy of MSCs lies in their multipotent differentiation ability towards vascular smooth muscle cells, endothelial cells and other cell types, as well as their capacity to secrete various trophic factors, which are potent in promoting angiogenesis, inhibiting apoptosis and modulating immunoreaction...
September 28, 2016: Microcirculation: the Official Journal of the Microcirculatory Society, Inc
Xialian Xu, Nana Song, Xue Zhang, Xiaoyan Jiao, Jiachang Hu, Mingyu Liang, Jie Teng, Xiaoqiang Ding
BACKGROUND: Angiogenesis contributes to the repair process after renal ischemia/reperfusion (I/R) injury. In the present study, we tested the role of miR-21 in the angiogenesis induced by hypoxia inducible factor (HIF) -1α through inhibiting a predicted target gene thrombospondin 1(TSP-1). METHODS: To stabilize HIF-1α, hypoxia (1% O2 for 24h) was performed in human umbilical vein endothelial cells (HUVECs) and cobalt chloride (CoCl2) was pretreated intraperitoneally 24h prior to renal I/R in mice...
September 27, 2016: Transplantation
Ana Rita S Pereira, Teresa F Mendes, Augusto Ministro, Mariana Teixeira, Mariana Filipe, Jorge M Santos, Rita N Bárcia, J Goyri-O'Neill, Fausto Pinto, Pedro E Cruz, Helder J Cruz, Susana Constantino Rosa Santos
BACKGROUND: Mesenchymal stem cells derived from human umbilical cord tissue, termed UCX®, have the potential to promote a full range of events leading to tissue regeneration and homeostasis. The main goal of this work was to investigate UCX® action in experimentally induced hindlimb ischemia (HLI). METHODS: UCX®, obtained by using a proprietary technology developed by ECBio (Amadora, Portugal), were delivered via intramuscular injection to C57BL/6 females after unilateral HLI induction...
September 29, 2016: Stem Cell Research & Therapy
Sarah Vosen, Sarah Rieck, Alexandra Heidsieck, Olga Mykhaylyk, Katrin Zimmermann, Christian Plank, Bernhard Gleich, Alexander Pfeifer, Bernd K Fleischmann, Daniela Wenzel
Gene therapy is a promising approach for chronic disorders that require continuous treatment such as cardiovascular disease. Overexpression of vasoprotective genes has generated encouraging results in animal models, but not in clinical trials. One major problem in humans is the delivery of sufficient amounts of genetic vectors to the endothelium which is impeded by blood flow, whereas prolonged stop-flow conditions impose the risk of ischemia. In the current study we have therefore developed a strategy for the efficient circumferential lentiviral gene transfer in the native endothelium under constant flow conditions...
November 10, 2016: Journal of Controlled Release: Official Journal of the Controlled Release Society
Jun Xie, Ran Li, Han Wu, Jianzhou Chen, Guannan Li, Qinhua Chen, Zhonghai Wei, Guixin He, Lian Wang, Albert Ferro, Biao Xu
Endothelial progenitor cells (EPCs) are a subtype of bone marrow-derived progenitor cells. Stromal cell-derived factor 1 (SDF-1)-mediated EPC mobilization from bone marrow to areas of ischemia plays an important role in angiogenesis. Previous studies have reported that advanced glycation endproducts (AGEs), which are important mediators of diabetes-related vascular pathology, may impair EPC migration and homing, but the mechanism is unclear. Syndecan-4 (synd4) is a ubiquitous heparan sulfate proteoglycan receptor on the cell surface, involved in SDF-1-dependent cell migration...
September 24, 2016: Stem Cells
Fangfang Yan, Chao Jiang, Yan Meng, Huijuan Li, Lie Yu, Xiaojie Fu, Youcai Tang, Meimei Zhang
Erythropoietin (EPO) is important for angiogenesis after hypoxia/ischemia. In this study, we investigated whether recombinant human erythropoietin (rhEPO) can enhance angiogenesis, and promote cognitive function through vascular endothelial growth factor (VEGF)/VEGF receptor 2 (VEGFR2) signaling pathway in a rat model of hypoxic-ischemic encephalopathy (HIE). RhEPO, selective VEGFR2 inhibitor (SU5416) or vehicle was administrated by intraperitoneal injection. The assessment for cognitive function begins on day 60 after anoxia...
September 19, 2016: Brain Research
Cunping Yin, Yuan Liang, Jian Zhang, Guangping Ruan, Zian Li, Rongqing Pang, Xinghua Pan
Hindlimb ischemia is still a clinical problem with high morbidity and mortality. Patients suffer from consequent rest pain, ulcers, cool limbs, and even amputation. Angiogenesis is a promising target for the treatment of ischemic limbs, providing extra blood for the ischemic region. In the present study, we investigated the role of umbilical cord-derived mesenchymal stem cells (UC-MSCs) in regulating angiogenesis and relieving hindlimb ischemia. UC-MSCs were isolated from the umbilical cord of tree shrews. Angiography results showed that UC-MSCs injection significantly promoted angiogenesis in tree shrews...
2016: Stem Cells International
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