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Lim NSJ, Sham A, Chee SML, Chan C, Raghunath M. Combination of ciclopirox olamine and sphingosine-1-phosphate as granulation enhancer in diabetic wounds. Wound Repair Regen 2016; 24:795-809. [DOI: 10.1111/wrr.12463] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2016] [Accepted: 07/05/2016] [Indexed: 12/25/2022]
Affiliation(s)
- Natalie Sheng Jie Lim
- Institute of Medical Biology, Biomedical Research Council, Agency for Science, Technology and Research, (A*STAR)
- Department of Biomedical Engineering; National University of Singapore
- NUS Tissue Engineering Programme; Life Sciences Institute, National University of Singapore
| | - Adeline Sham
- Institute of Medical Biology, Biomedical Research Council, Agency for Science, Technology and Research, (A*STAR)
- Department of Biomedical Engineering; National University of Singapore
- NUS Tissue Engineering Programme; Life Sciences Institute, National University of Singapore
| | - Stella Min Ling Chee
- Institute of Medical Biology, Biomedical Research Council, Agency for Science, Technology and Research, (A*STAR)
- Department of Biomedical Engineering; National University of Singapore
- NUS Tissue Engineering Programme; Life Sciences Institute, National University of Singapore
| | - Casey Chan
- Department of Biomedical Engineering; National University of Singapore
- Department of Orthopedic Surgery; Yong Loo Ling School of Medicine, National University of Singapore; Singapore
| | - Michael Raghunath
- Institute of Medical Biology, Biomedical Research Council, Agency for Science, Technology and Research, (A*STAR)
- Department of Biomedical Engineering; National University of Singapore
- NUS Tissue Engineering Programme; Life Sciences Institute, National University of Singapore
- Department of Biochemistry; Yong Loo Ling School of Medicine, National University of Singapore
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Paeoniflorin Promotes Angiogenesis in A Vascular Insufficiency Model of Zebrafish in vivo and in Human Umbilical Vein Endothelial Cells in vitro. Chin J Integr Med 2016; 24:494-501. [DOI: 10.1007/s11655-016-2262-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/18/2016] [Indexed: 10/21/2022]
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Novakova V, Sandhu GS, Dragomir-Daescu D, Klabusay M. Apelinergic system in endothelial cells and its role in angiogenesis in myocardial ischemia. Vascul Pharmacol 2016; 76:1-10. [DOI: 10.1016/j.vph.2015.08.005] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2015] [Revised: 08/01/2015] [Accepted: 08/03/2015] [Indexed: 12/21/2022]
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Scofield SLC, Amin P, Singh M, Singh K. Extracellular Ubiquitin: Role in Myocyte Apoptosis and Myocardial Remodeling. Compr Physiol 2015; 6:527-60. [PMID: 26756642 DOI: 10.1002/cphy.c150025] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Ubiquitin (UB) is a highly conserved low molecular weight (8.5 kDa) protein. It consists of 76 amino acid residues and is found in all eukaryotic cells. The covalent linkage of UB to a variety of cellular proteins (ubiquitination) is one of the most common posttranslational modifications in eukaryotic cells. This modification generally regulates protein turnover and protects the cells from damaged or misfolded proteins. The polyubiquitination of proteins serves as a signal for degradation via the 26S proteasome pathway. UB is present in trace amounts in body fluids. Elevated levels of UB are described in the serum or plasma of patients under a variety of conditions. Extracellular UB is proposed to have pleiotropic roles including regulation of immune response, anti-inflammatory, and neuroprotective activities. CXCR4 is identified as receptor for extracellular UB in hematopoietic cells. Heart failure represents a major cause of morbidity and mortality in western society. Cardiac remodeling is a determinant of the clinical course of heart failure. The components involved in myocardial remodeling include-myocytes, fibroblasts, interstitium, and coronary vasculature. Increased sympathetic nerve activity in the form of norepinephrine is a common feature during heart failure. Acting via β-adrenergic receptor (β-AR), norepinephrine is shown to induce myocyte apoptosis and myocardial fibrosis. β-AR stimulation increases extracellular levels of UB in myocytes, and UB inhibits β-AR-stimulated increases in myocyte apoptosis and myocardial fibrosis. This review summarizes intracellular and extracellular functions of UB with particular emphasis on the role of extracellular UB in cardiac myocyte apoptosis and myocardial remodeling.
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Affiliation(s)
- Stephanie L C Scofield
- Department of Biomedical Sciences, East Tennessee State University, Johnson City, Tennessee, USA
| | - Parthiv Amin
- Department of Biomedical Sciences, East Tennessee State University, Johnson City, Tennessee, USA
| | - Mahipal Singh
- Department of Biomedical Sciences, East Tennessee State University, Johnson City, Tennessee, USA
| | - Krishna Singh
- Department of Biomedical Sciences, East Tennessee State University, Johnson City, Tennessee, USA; Center for Inflammation, Infectious Disease and Immunity, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, Tennessee, USA; James H. Quillen VA Medical Center, East Tennessee State University, Johnson City, Tennessee, USA.,Department of Medicine, Albany Medical College, Albany, New York, USA.,Pharmaceutical Research Institute, Albany College of Pharmacy and Health Sciences, Rensselaer, New York, USA
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Brain protection against ischemic stroke using choline as a new molecular bypass treatment. Acta Pharmacol Sin 2015; 36:1416-25. [PMID: 26567726 DOI: 10.1038/aps.2015.104] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2015] [Accepted: 09/29/2015] [Indexed: 12/24/2022] Open
Abstract
AIM To determine whether administration of choline could attenuate brain injury in a rat model of ischemic stroke and the underlying mechanisms. METHODS A rat model of ischemic stroke was established through permanent middle cerebral artery occlusion (pMCAO). After the surgery, the rats were treated with choline or choline plus the specific α7 nAChR antagonist methyllycaconitine (MLA), or with the control drug nimodipine for 10 days. The neurological deficits, brain-infarct volume, pial vessel density and the number of microvessels in the cortex were assessed. Rat brain microvascular endothelial cells (rBMECs) cultured under hypoxic conditions were used in in vitro experiments. RESULTS Oral administration of choline (100 or 200 mg·kg(-1)·d(-1)) or nimodipine (20 mg·kg(-1)·d(-1)) significantly improved neurological deficits, and reduced infarct volume and nerve cell loss in the ischemic cerebral cortices in pMCAO rats. Furthermore, oral administration of choline, but not nimodipine, promoted the pial arteriogenesis and cerebral-cortical capillary angiogenesis in the ischemic regions. Moreover, oral administration of choline significantly augmented pMCAO-induced increases in the expression levels of α7 nAChR, HIF-1α and VEGF in the ischemic cerebral cortices as well as in the serum levels of VEGF. Choline-induced protective effects were prevented by co-treatment with MLA (1 mg·kg(-1)·d(-1), ip). Treatment of rBMECs cultured under hypoxic conditions in vitro with choline (1, 10 and 100 μmol/L) dose-dependently promoted the endothelial-cell proliferation, migration and tube formation, as well as VEGF secretion, which were prevented by co-treatment with MLA (1 μmol/L) or by transfection with HIF-1α siRNA. CONCLUSION Choline effectively attenuates brain ischemic injury in pMCAO rats, possibly by facilitating pial arteriogenesis and cerebral-cortical capillary angiogenesis via upregulating α7 nAChR levels and inducing the expression of HIF-1α and VEGF.
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Wu BJ, Shrestha S, Ong KL, Johns D, Dunn LL, Hou L, Barter PJ, Rye KA. Increasing HDL levels by inhibiting cholesteryl ester transfer protein activity in rabbits with hindlimb ischemia is associated with increased angiogenesis. Int J Cardiol 2015. [PMID: 26204569 DOI: 10.1016/j.ijcard.2015.07.014] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
BACKGROUND High density lipoprotein (HDL) infusions increase new blood vessel formation (angiogenesis) in rodents with ischemic injury. This study asks if increasing HDL levels by inhibiting cholesteryl ester transfer protein (CETP) activity increases angiogenesis in New Zealand White (NZW) rabbits with hindlimb ischemia. METHODS AND RESULTS NZW rabbits were maintained for 6weeks on chow or chow supplemented with 0.07% or 0.14% (wt/wt) of the CETP inhibitor, des-fluoro-anacetrapib. The left femoral artery was ligated after 2weeks of des-fluoro-anacetrapib treatment. The animals were sacrificed 4weeks after femoral artery ligation. Treatment with 0.07% and 0.14% (wt/wt) des-fluoro-anacetrapib reduced CETP activity by 63±12% and 81±8.6%, increased plasma apoA-I levels by 1.3±0.1- and 1.4±0.1-fold, and increased plasma HDL-cholesterol levels by 1.4±0.1- and 1.7±0.2-fold, respectively. Treatment with 0.07% and 0.14% (wt/wt) des-fluoro-anacetrapib increased the number of collateral arteries by 60±16% and 84±27%, and arteriole wall area in the ischemic hindlimbs by 84±16% and 94±13%, respectively. Capillary density in the ischemic hindlimb adductor muscle increased from 1.1±0.2 (control) to 2.1±0.3 and 2.2±0.4 in the 0.07% and 0.14% (wt/wt) des-fluoro-anacetrapib-treated animals, respectively. Incubation of HDLs from des-fluoro-anacetrapib-treated animals with human coronary artery endothelial cells at apoA-I concentrations comparable with their plasma levels increased tubule network formation. These effects were abolished by knockdown of scavenger receptor-B1 (SR-B1) and PDZK1, and pharmacological inhibition of PI3K/Akt. CONCLUSION Increasing HDL levels by inhibiting CETP activity is associated with increased collateral blood vessel formation in NZW rabbits with hindlimb ischemia in an SR-B1- and PI3K/Akt-dependent manner.
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Affiliation(s)
- Ben J Wu
- Centre for Vascular Research, Level 3, Lowy Centre, The University of New South Wales, Sydney 2052, New South Wales, Australia; The Heart Research Institute, 7 Eliza St, Newtown, Sydney, New South Wales 2042, Australia; Sydney Medical School, University of Sydney, Sydney, New South Wales, Australia.
| | - Sudichhya Shrestha
- Centre for Vascular Research, Level 3, Lowy Centre, The University of New South Wales, Sydney 2052, New South Wales, Australia; The Heart Research Institute, 7 Eliza St, Newtown, Sydney, New South Wales 2042, Australia
| | - Kwok L Ong
- Centre for Vascular Research, Level 3, Lowy Centre, The University of New South Wales, Sydney 2052, New South Wales, Australia; The Heart Research Institute, 7 Eliza St, Newtown, Sydney, New South Wales 2042, Australia; Sydney Medical School, University of Sydney, Sydney, New South Wales, Australia
| | | | - Louise L Dunn
- The Heart Research Institute, 7 Eliza St, Newtown, Sydney, New South Wales 2042, Australia; Vascular Biology Division, Victor Chang Cardiac Research Institute, Sydney, New South Wales 2010, Australia
| | - Liming Hou
- Centre for Vascular Research, Level 3, Lowy Centre, The University of New South Wales, Sydney 2052, New South Wales, Australia; The Heart Research Institute, 7 Eliza St, Newtown, Sydney, New South Wales 2042, Australia
| | - Philip J Barter
- Centre for Vascular Research, Level 3, Lowy Centre, The University of New South Wales, Sydney 2052, New South Wales, Australia; The Heart Research Institute, 7 Eliza St, Newtown, Sydney, New South Wales 2042, Australia; Sydney Medical School, University of Sydney, Sydney, New South Wales, Australia
| | - Kerry-Anne Rye
- Centre for Vascular Research, Level 3, Lowy Centre, The University of New South Wales, Sydney 2052, New South Wales, Australia; The Heart Research Institute, 7 Eliza St, Newtown, Sydney, New South Wales 2042, Australia; Sydney Medical School, University of Sydney, Sydney, New South Wales, Australia.
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Sasaki JI, Hashimoto M, Yamaguchi S, Itoh Y, Yoshimoto I, Matsumoto T, Imazato S. Fabrication of Biomimetic Bone Tissue Using Mesenchymal Stem Cell-Derived Three-Dimensional Constructs Incorporating Endothelial Cells. PLoS One 2015; 10:e0129266. [PMID: 26047122 PMCID: PMC4457484 DOI: 10.1371/journal.pone.0129266] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2015] [Accepted: 05/06/2015] [Indexed: 01/17/2023] Open
Abstract
The development of technologies to promote vascularization of engineered tissue would drive major developments in tissue engineering and regenerative medicine. Recently, we succeeded in fabricating three-dimensional (3D) cell constructs composed of mesenchymal stem cells (MSCs). However, the majority of cells within the constructs underwent necrosis due to a lack of nutrients and oxygen. We hypothesized that incorporation of vascular endothelial cells would improve the cell survival rate and aid in the fabrication of biomimetic bone tissues in vitro. The purpose of this study was to assess the impact of endothelial cells combined with the MSC constructs (MSC/HUVEC constructs) during short- and long-term culture. When human umbilical vein endothelial cells (HUVECs) were incorporated into the cell constructs, cell viability and growth factor production were increased after 7 days. Furthermore, HUVECs were observed to proliferate and self-organize into reticulate porous structures by interacting with the MSCs. After long-term culture, MSC/HUVEC constructs formed abundant mineralized matrices compared with those composed of MSCs alone. Transmission electron microscopy and qualitative analysis revealed that the mineralized matrices comprised porous cancellous bone-like tissues. These results demonstrate that highly biomimetic bone tissue can be fabricated in vitro by 3D MSC constructs incorporated with HUVECs.
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Affiliation(s)
- Jun-Ichi Sasaki
- Department of Biomaterials Science, Osaka University Graduate School of Dentistry, Osaka, Japan
- * E-mail:
| | - Masanori Hashimoto
- Department of Biomaterials Science, Osaka University Graduate School of Dentistry, Osaka, Japan
| | - Satoshi Yamaguchi
- Department of Biomaterials Science, Osaka University Graduate School of Dentistry, Osaka, Japan
| | - Yoshihiro Itoh
- Department of Biomaterials Science, Osaka University Graduate School of Dentistry, Osaka, Japan
- Department of Restorative Dentistry and Endodontology, Osaka University Graduate School of Dentistry, Osaka, Japan
| | - Itsumi Yoshimoto
- Department of Biomaterials Science, Osaka University Graduate School of Dentistry, Osaka, Japan
| | | | - Satoshi Imazato
- Department of Biomaterials Science, Osaka University Graduate School of Dentistry, Osaka, Japan
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Jose S, Hughbanks ML, Binder BYK, Ingavle GC, Leach JK. Enhanced trophic factor secretion by mesenchymal stem/stromal cells with Glycine-Histidine-Lysine (GHK)-modified alginate hydrogels. Acta Biomater 2014; 10:1955-64. [PMID: 24468583 DOI: 10.1016/j.actbio.2014.01.020] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2013] [Revised: 12/23/2013] [Accepted: 01/16/2014] [Indexed: 01/15/2023]
Abstract
Recombinant proteins and cytokines are under broad preclinical and clinical investigation to promote angiogenesis, but their success is limited by ineffective delivery, lack of long-term stability and excessive cost. Mesenchymal stem/stromal cells (MSC) secrete bioactive trophic factors, and thus, may provide an effective alternative to address these challenges. Glycine-Histidine-Lysine (GHK) is a peptide fragment of osteonectin, a matricellular protein with reported proangiogenic potential. We examined the capacity of GHK to up-regulate secretion of proangiogenic factors from human MSC in culture and when covalently coupled to alginate hydrogels. GHK had no apparent cytotoxic effects on MSC in culture over a wide range of concentrations. We detected a dose-dependent increase in vascular endothelial growth factor (VEGF) concentration in media conditioned by GHK-treated MSC, which increased endothelial cell proliferation, migration and tubule formation. We covalently coupled GHK to alginate using carbodiimide chemistry, and human MSC were entrapped in alginate hydrogels to assess VEGF secretion. Similar to monolayer culture, MSC responded to GHK-modified gels by secreting increased concentrations of VEGF and basic fibroblast growth factor compared to unmodified gels. The pre-treatment of MSC with antibodies to α6 and β1 integrins prior to entrapment in GHK-modified gels abrogated VEGF secretion, suggesting that the proangiogenic response of MSC was integrin-mediated. These data demonstrate that the proangiogenic potential of MSC can be significantly increased by the presentation of GHK with a biodegradable carrier, therefore increasing their clinical potential when used for tissue repair.
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Affiliation(s)
- Soumia Jose
- Department of Biomedical Engineering, University of California, Davis, Davis, CA, USA
| | - Marissa L Hughbanks
- Department of Biomedical Engineering, University of California, Davis, Davis, CA, USA
| | - Bernard Y K Binder
- Department of Biomedical Engineering, University of California, Davis, Davis, CA, USA
| | - Ganesh C Ingavle
- Department of Biomedical Engineering, University of California, Davis, Davis, CA, USA
| | - J Kent Leach
- Department of Biomedical Engineering, University of California, Davis, Davis, CA, USA; Department of Orthopaedic Surgery, University of California, Davis, School of Medicine, Sacramento, CA, USA.
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