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exosome and angiogenesis

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https://www.readbyqxmd.com/read/28298297/angiogenic-mechanisms-of-human-cd34-stem-cell-exosomes-in-the-repair-of-ischemic-hindlimb
#1
Prabhu Mathiyalagan, Yaxuan Liang, David Kim, Sol Misener, Tina Thorne, Christine Kamide, Ekaterina Klyachko, Douglas W Losordo, Roger J Hajjar, Susmita Sahoo
Rationale: Paracrine secretions appear to mediate therapeutic effects of human CD34(+) stem cells locally transplanted in patients with myocardial and critical limb ischemia as well as in animal models. Earlier, we had discovered that paracrine secretion from human CD34(+) cells contains pro-angiogenic, membrane-bound nano-vesicles called exosomes (CD34Exo). Objective: Here, we investigated the mechanisms of CD34Exo-mediated ischemic tissue repair and therapeutic angiogenesis by studying their miRNA content and uptake...
March 15, 2017: Circulation Research
https://www.readbyqxmd.com/read/28297576/chitosan-wound-dressings-incorporating-exosomes-derived-from-microrna-126-overexpressing-synovium-mesenchymal-stem-cells-provide-sustained-release-of-exosomes-and-heal-full-thickness-skin-defects-in-a-diabetic-rat-model
#2
Shi-Cong Tao, Shang-Chun Guo, Min Li, Qin-Fei Ke, Ya-Ping Guo, Chang-Qing Zhang
There is a need to find better strategies to promote wound healing, especially of chronic wounds, which remain a challenge. We found that synovium mesenchymal stem cells (SMSCs) have the ability to strongly promote cell proliferation of fibroblasts; however, they are ineffective at promoting angiogenesis. Using gene overexpression technology, we overexpressed microRNA-126-3p (miR-126-3p) and transferred the angiogenic ability of endothelial progenitor cells to SMSCs, promoting angiogenesis. We tested a therapeutic strategy involving controlled-release exosomes derived from miR-126-3p-overexpressing SMSCs combined with chitosan...
March 2017: Stem Cells Translational Medicine
https://www.readbyqxmd.com/read/28286751/new-delivery-systems-of-stem-cells-for-vascular-regeneration-in-ischemia
#3
REVIEW
Adegbenro Omotuyi John Fakoya
The finances of patients and countries are increasingly overwhelmed with the plague of cardiovascular diseases as a result of having to chronically manage the associated complications of ischemia such as heart failures, neurological deficits, chronic limb ulcers, gangrenes, and amputations. Hence, scientific research has sought for alternate therapies since pharmacological and surgical treatments have fallen below expectations in providing the desired quality of life. The advent of stem cells research has raised expectations with respect to vascular regeneration and tissue remodeling, hence assuring the patients of the possibility of an improved quality of life...
2017: Frontiers in Cardiovascular Medicine
https://www.readbyqxmd.com/read/28271621/first-characterization-of-human-amniotic-fluid-stem-cell-extracellular-vesicles-as-a-powerful-paracrine-tool-endowed-with-regenerative-potential
#4
Carolina Balbi, Martina Piccoli, Lucio Barile, Andrea Papait, Andrea Armirotti, Elisa Principi, Daniele Reverberi, Luisa Pascucci, Pamela Becherini, Luigi Varesio, Massimo Mogni, Domenico Coviello, Tiziano Bandiera, Michela Pozzobon, Ranieri Cancedda, Sveva Bollini
Human amniotic fluid stem cells (hAFS) have shown a distinct secretory profile and significant regenerative potential in several preclinical models of disease. Nevertheless, little is known about the detailed characterization of their secretome. Herein we show for the first time that hAFS actively release extracellular vesicles (EV) endowed with significant paracrine potential and regenerative effect. c-KIT(+) hAFS were isolated from leftover samples of amniotic fluid from prenatal screening and stimulated to enhance EV release (24 hours 20% O2 versus 1% O2 preconditioning)...
March 8, 2017: Stem Cells Translational Medicine
https://www.readbyqxmd.com/read/28255363/exosomes-derived-from-human-platelet-rich-plasma-prevent-apoptosis-induced-by-glucocorticoid-associated-endoplasmic-reticulum-stress-in-rat-osteonecrosis-of-the-femoral-head-via-the-akt-bad-bcl-2-signal-pathway
#5
Shi-Cong Tao, Ting Yuan, Bi-Yu Rui, Zhen-Zhong Zhu, Shang-Chun Guo, Chang-Qing Zhang
An excess of glucocorticoids (GCs) is reported to be one of the most common causes of osteonecrosis of the femoral head (ONFH). In addition, GCs can induce bone cell apoptosis through modulating endoplasmic reticulum (ER) stress. Among the three main signal pathways in ER stress, the PERK (protein kinase RNA-like ER kinase)/CHOP (CCAAT-enhancer-binding protein homologous protein) pathway has been considered to be closely associated with apoptosis. Platelet-rich plasma (PRP) has been referred to as a concentration of growth factors and the exosomes derived from PRP (PRP-Exos) have a similar effect to their parent material...
2017: Theranostics
https://www.readbyqxmd.com/read/28255275/exosomes-secreted-from-human-induced-pluripotent-stem-cell-derived-mesenchymal-stem-cells-prevent-osteonecrosis-of-the-femoral-head-by-promoting-angiogenesis
#6
Xiaolin Liu, Qing Li, Xin Niu, Bin Hu, Shengbao Chen, Wenqi Song, Jian Ding, Changqing Zhang, Yang Wang
Background: Local ischemia is the main pathological performance in osteonecrosis of the femoral head (ONFH). There is currently no effective therapy to promote angiogenesis in the femoral head. Recent studies revealed that exosomes secreted by induced pluripotent stem cell-derived mesenchymal stem cells (iPS-MSC-Exos) have great therapeutic potential in ischemic tissues, but whether they could promote angiogenesis in ONFH has not been reported, and little is known regarding the underlying mechanism. Methods: iPS-MSC-Exos were intravenously injected to a steroid-induced rat osteonecrosis model...
2017: International Journal of Biological Sciences
https://www.readbyqxmd.com/read/28247946/the-emerging-role-of-exosome-and-microvesicle-emv-based-cancer-therapeutics-and-immunotherapy
#7
REVIEW
Colin Moore, Uchini Kosgodage, Sigrun Lange, Jameel M Inal
There is an urgent need to develop new combination therapies beyond existing surgery, radio- and chemo-therapy, perhaps initially combining chemotherapy with the targeting specificities of immunotherapy. For this, strategies to limit inflammation and immuno-suppression and evasion in the tumour microenvironment are also needed. To devise effective new immunotherapies we must first understand tumour immunology, including the roles of T cells, macrophages, myeloid suppressor cells and of exosomes and microvesicles (EMVs) in promoting angiogenesis, tumour growth, drug resistance and metastasis...
March 1, 2017: International Journal of Cancer. Journal International du Cancer
https://www.readbyqxmd.com/read/28170176/exosomes-derived-from-akt-modified-human-umbilical-cord-mesenchymal-stem-cells-improve-cardiac-regeneration-and-promote-angiogenesis-via-activating-platelet-derived-growth-factor-d
#8
Jie Ma, Yuanyuan Zhao, Li Sun, Xiaochun Sun, Xiaosu Zhao, Xiaoxian Sun, Hui Qian, Wenrong Xu, Wei Zhu
We have previously demonstrated the cardioprotective effects of exosomes derived from mesenchymal stem cells (MSCs). It is well known that the activation of Akt is involved in stem cell-induced cardioprotection. In the present study, we investigated whether exosomes released from Akt-overexpressing MSCs showed a beneficial effect on cardioprotection and angiogenesis. MSCs were collected from human umbilical cord (hucMSCs), and Akt was transfected into hucMSCs (Akt-hucMSCs) by using an adenovirus transfection system...
January 2017: Stem Cells Translational Medicine
https://www.readbyqxmd.com/read/28165027/potential-role-of-corneal-epithelial-cell-derived-exosomes-in-corneal-wound-healing-and-neovascularization
#9
Kyu-Yeon Han, Jennifer A Tran, Jin-Hong Chang, Dimitri T Azar, James D Zieske
Specific factors from the corneal epithelium underlying the stimulation of stromal fibrosis and myofibroblast formation in corneal wound healing have not been fully elucidated. Given that exosomes are known to transfer bioactive molecules among cells and play crucial roles in wound healing, angiogenesis, and cancer, we hypothesized that corneal epithelial cell-derived exosomes may gain access to the underlying stromal fibroblasts upon disruption of the epithelial basement membrane and that they induce signaling events essential for corneal wound healing...
February 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28164613/high-concentrations-of-the-angiogenic-peptide-vegf-a-in-seminal-fluid-and-its-association-to-prostasomes
#10
Lena Carlsson, Gunnar Ronquist, Rune Elisasson, Louise Dubois, Karl G Ronquist, Anders Larsson
BACKGROUND: Angiogenesis is the formation of new blood vessels by capillary sprouting from pre-existing vessels. This process is associated with increased expression of angiogenic factors like vascular endothelial growth factor (VEGF). The VEGF family consists of five members denoted VEGF-A, B, C, D and placenta growth factor (PlGF). Prostasomes are exosome-like extracellular vesicles existing in seminal plasma. The present study aimed at investigating the possible relationship between VEGF-A in seminal fluid and blood plasma and the prostasomal association of VEGF-A...
August 1, 2016: Clinical Laboratory
https://www.readbyqxmd.com/read/28163069/adipose-derived-stem-cells-protect-skin-flaps-against-ischemia-reperfusion-injury-via-interleukin-6-expression
#11
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/28159509/human-pericardial-fluid-contains-exosomes-enriched-with-cardiovascular-expressed-micrornas-and-promotes-therapeutic-angiogenesis
#12
Cristina Beltrami, Marie Besnier, Saran Shantikumar, Andrew I U Shearn, Cha Rajakaruna, Abas Laftah, Fausto Sessa, Gaia Spinetti, Enrico Petretto, Gianni D Angelini, Costanza Emanueli
The pericardial fluid (PF) is contained in the pericardial sac surrounding the heart. MicroRNA (miRNA) exchange via exosomes (endogenous nanoparticles) contributes to cell-to-cell communication. We investigated the hypotheses that the PF is enriched with miRNAs secreted by the heart and that it mediates vascular responses through exosome exchange of miRNAs. The study was developed using leftover material from aortic valve surgery. We found that in comparison with peripheral plasma, the PF contains exosomes enriched with miRNAs co-expressed in patients' myocardium and vasculature...
March 1, 2017: Molecular Therapy: the Journal of the American Society of Gene Therapy
https://www.readbyqxmd.com/read/28147325/emerging-role-of-exosome-mediated-intercellular-communication-in-vascular-remodeling
#13
Sheng-An Su, Yao Xie, Zurong Fu, Yaping Wang, Jian-An Wang, Meixiang Xiang
Vascular remodeling refers to the alternations of function and structure in vasculature. A complex autocrine/paracrine set of cellular interaction is involved in vascular remodeling. Exosome, a newly identified natural nanocarrier and intercellular messenger, plays a pivotal role in regulating cell-to-cell communication. Exosome emerges as an important mediator in the process of vascular remodeling, showing the most prognostic and therapeutic potent in vascular diseases. Benefiting from exosomal trafficking, the vasculature can not only maintain its function and structure in physiological condition, but also adapt itself in pathological status...
January 28, 2017: Oncotarget
https://www.readbyqxmd.com/read/28114883/release-of-endothelial-cell-associated-vegfr2-during-tgf-%C3%AE-modulated-angiogenesis-in-vitro
#14
M Jarad, E A Kuczynski, J Morrison, A M Viloria-Petit, B L Coomber
BACKGROUND: Sprouting angiogenesis requires vascular endothelial proliferation, migration and morphogenesis. The process is regulated by soluble factors, principally vascular endothelial growth factor (VEGF), and via bidirectional signaling through the Jagged/Notch system, leading to assignment of tip cell and stalk cell identity. The cytokine transforming growth factor beta (TGF-β) can either stimulate or inhibit angiogenesis via its differential surface receptor signaling. Here we evaluate changes in expression of angiogenic signaling receptors when bovine aortic endothelial cells were exposed to TGF-β1 under low serum conditions...
January 23, 2017: BMC Cell Biology
https://www.readbyqxmd.com/read/28104913/exosome-derived-micrornas-in-cancer-metabolism-possible-implications-in-cancer-diagnostics-and-therapy
#15
REVIEW
Marco Tomasetti, Wan Lee, Lory Santarelli, Jiri Neuzil
Malignant progression is greatly affected by dynamic cross-talk between stromal and cancer cells. Exosomes are secreted nanovesicles that have key roles in cell-cell communication by transferring nucleic acids and proteins to target cells and tissues. Recently, MicroRNAs (miRs) and their delivery in exosomes have been implicated in physiological and pathological processes. Tumor-delivered miRs, interacting with stromal cells in the tumor microenvironment, modulate tumor progression, angiogenesis, metastasis and immune escape...
January 20, 2017: Experimental & Molecular Medicine
https://www.readbyqxmd.com/read/28104773/exosomes-generated-from-ipsc-derivatives-new-direction-for-stem-cell-therapy-in-human-heart-diseases
#16
REVIEW
Ji-Hye Jung, Xuebin Fu, Phillip C Yang
Cardiovascular disease (CVD) is the leading cause of death in modern society. The adult heart innately lacks the capacity to repair and regenerate the damaged myocardium from ischemic injury. Limited understanding of cardiac tissue repair process hampers the development of effective therapeutic solutions to treat CVD such as ischemic cardiomyopathy. In recent years, rapid emergence of induced pluripotent stem cells (iPSC) and iPSC-derived cardiomyocytes presents a valuable opportunity to replenish the functional cells to the heart...
January 20, 2017: Circulation Research
https://www.readbyqxmd.com/read/28079186/extracellular-vesicle-mediated-intercellular-communication-at-the-porcine-maternal-fetal-interface-a-new-paradigm-for-conceptus-endometrial-cross-talk
#17
Mallikarjun Bidarimath, Kasra Khalaj, Rami T Kridli, Frederick W K Kan, Madhuri Koti, Chandrakant Tayade
Exosomes and microvesicles are extracellular vesicles released from cells and can contain lipids, miRNAs and proteins that affect cells at distant sites. Recently, microvesicles containing miRNA have been implicated in uterine microenvironment of pigs, a species with unique epitheliochorial (non-invasive) placentation. Here we report a novel role of conceptus-derived exosomes/microvesicles (hereafter referred to as extracellular vesicles; EVs) in embryo-endometrial cross-talk. We also demonstrate the stimulatory effects of EVs (PTr2-Exo) derived from porcine trophectoderm-cells on various biological processes including the proliferation of maternal endothelial cells (PAOEC), potentially promoting angiogenesis...
January 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28077296/extracellular-vesicle-communication-pathways-as-regulatory-targets-of-oncogenic-transformation
#18
REVIEW
Dongsic Choi, Tae Hoon Lee, Cristiana Spinelli, Shilpa Chennakrishnaiah, Esterina D'Asti, Janusz Rak
Pathogenesis of human cancers bridges intracellular oncogenic driver events and their impact on intercellular communication. Among multiple mediators of this 'pathological connectivity' the role of extracellular vesicles (EVs) and their subsets (exosomes, ectosomes, oncosomes) is of particular interest for several reasons. The release of EVs from cancer cells represents a unique mechanism of regulated expulsion of bioactive molecules, a process that also mediates cell-to-cell transfer of lipids, proteins, and nucleic acids...
January 8, 2017: Seminars in Cell & Developmental Biology
https://www.readbyqxmd.com/read/28042318/exosomes-derived-from-platelet-rich-plasma-promote-the-re-epithelization-of-chronic-cutaneous-wounds-via-activation-of-yap-in-a-diabetic-rat-model
#19
Shang-Chun Guo, Shi-Cong Tao, Wen-Jing Yin, Xin Qi, Ting Yuan, Chang-Qing Zhang
Chronic wounds have become an economic, social, and public health burden and need advanced treatment. Platelet-rich plasma (PRP) has been used extensively in treatment of chronic wounds because it contains an abundance of growth factors secreted by platelets. The exosomes derived from PRP (PRP-Exos) have been proven to encapsulate principal growth factors from platelets. This study is the first to show that these exosomes may exert the function of PRP. PRP-Exos can effectively induce proliferation and migration of endothelial cells and fibroblasts to improve angiogenesis and re-epithelialization in chronic wounds...
2017: Theranostics
https://www.readbyqxmd.com/read/28038441/visualization-of-exosome-mediated-mir-210-transfer-from-hypoxic-tumor-cells
#20
Kyung Oh Jung, Hyewon Youn, Chul-Hee Lee, Keon Wook Kang, June-Key Chung
Cancer cells actively release exosomes carrying specific cellular components, such as proteins, mRNA, and miRNA, to communicate with various cells in the tumor microenvironment. We visualized exosome-mediated transfer of miR-210 from hypoxic breast cancer cells to neighboring cells using a miR-210 specific reporter system. By in vitro and in vivo visualization, we found that exosomes with miR-210 were transferred to cells in the tumor microenvironment and that miR-210 was involved in expression of vascular remodeling related genes, such as Ephrin A3 and PTP1B, to promote angiogenesis...
February 7, 2017: Oncotarget
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