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Chen S, Wang Y, Kong L, Ji Y, Cui J, Shen W. Role of UDP-glucose ceramide glucosyltransferase in venous malformation. Front Cell Dev Biol 2023; 11:1178045. [PMID: 37274734 PMCID: PMC10235597 DOI: 10.3389/fcell.2023.1178045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Accepted: 05/11/2023] [Indexed: 06/06/2023] Open
Abstract
Venous malformation (VM) results from the abnormal growth of the vasculature; however, the detailed molecular mechanism remains unclear. As a glycosyltransferase, UDP-glucose ceramide glucosyltransferase (UGCG) is localized to the Golgi body and is a key enzyme in the first step of glycosphingolipid synthesis. Here, we aimed to explore the relationship between UGCG and the development of VM. First, investigations using RT-qPCR and Western blotting on the diseased vasculature of VM patients and normal vascular tissues revealed that UGCG expression was markedly elevated in the diseased vessels. Subsequently, immunofluorescence assay showed that UGCG was co-localized with CD31, an endothelial cell marker, in tissues from patients with VM and healthy subjects. Then, we established TIE2-L914F-mutant human umbilical vein endothelial cells (HUVECs) by lentivirus transfection. Next, Western blotting revealed that UGCG expression was considerably higher in HUVECsTIE2-L914F. In addition, we established a UGCG-overexpressing HUVECs line by plasmid transfection. With the CCK8 cell proliferation experiment, wound healing assay, and tube formation assay, we found that UGCG could promote the proliferation, migration, and tube formation activity of HUVECs, whereas the inhibition of UGCG could inhibit the proliferation, migration, and tube formation activity of HUVECsTIE2-L914F. Finally, Western blotting revealed that UGCG regulates the AKT/mTOR pathway in HUVECs. These data demonstrated that UGCG can affect the activity of vascular endothelial cells and regulate the AKT/mTOR signaling pathway; this is a potential mechanism underlying VM pathogenesis.
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Li JZ, Zhou XX, Wu WY, Qiang HF, Xiao GS, Wang Y, Li G. Concanavalin A promotes angiogenesis and proliferation in endothelial cells through the Akt/ERK/Cyclin D1 axis. PHARMACEUTICAL BIOLOGY 2022; 60:65-74. [PMID: 34913414 PMCID: PMC8725916 DOI: 10.1080/13880209.2021.2013259] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
CONTEXT Concanavalin A (Con A) exhibited multiple roles in cancer cells. However, the role of Con A in endothelial cells was not reported. OBJECTIVE Our present study investigated the potential angiogenic role of Con A in endothelial cells and ischaemic hind-limb mice. MATERIALS AND METHODS Human umbilical vein endothelial cells and Ea.hy926 cells were employed to determine the effect of Con A (0.3, 1, and 3 μg/mL) or vehicle on angiogenesis and cell proliferation with tube formation, ELISA, flow cytometry, EdU, and western blot. Hind-limb ischaemic mice were conducted to determine the pro-angiogenic effect of Con A (10 mg/kg) for 7 days. RESULTS Con A promoted tube formation to about three-fold higher than the control group and increased the secretion of VEGFa, PDGFaa, and bFGF in the medium. The cell viability was promoted to 1.3-fold by Con A 3 μg/mL, and cell cycle progression of G0G1 phase was decreased from 77% in the vehicle group to 70% in Con A 3 μg/mL, G2M was promoted from 15 to 19%, and S-phase was from 7 to 10%. Con A significantly stimulated phosphorylation of Akt and ERK1/2 and expression of cyclin D1 and decreased the expression of p27. These effects of Con A were antagonised by the PI3K inhibitor LY294002 (10 μM) and MEK pathway antagonist PD98059 (10 μM). Moreover, Con A (10 mg/kg) exhibited a repair effect in ischaemic hind-limb mice. DISCUSSION AND CONCLUSIONS This study will provide a new option for treating ischaemic disease by local injection with Con A.
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Affiliation(s)
- Jing-Zhou Li
- Xiamen Cardiovascular Hospital, Xiamen University, Xiamen, Fujian, China
| | - Xiao-Xia Zhou
- Xiamen Cardiovascular Hospital, Xiamen University, Xiamen, Fujian, China
| | - Wei-Yin Wu
- Xiamen Cardiovascular Hospital, Xiamen University, Xiamen, Fujian, China
| | - Hai-Feng Qiang
- Xiamen Cardiovascular Hospital, Xiamen University, Xiamen, Fujian, China
| | - Guo-Sheng Xiao
- Xiamen Cardiovascular Hospital, Xiamen University, Xiamen, Fujian, China
| | - Yan Wang
- Xiamen Cardiovascular Hospital, Xiamen University, Xiamen, Fujian, China
| | - Gang Li
- Xiamen Cardiovascular Hospital, Xiamen University, Xiamen, Fujian, China
- CONTACT Gang Li ; Xiamen Cardiovascular Hospital, Xiamen University, Xiamen, Fujian, China
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Mukherjee S, Jana S, Khawas S, Kicuntod J, Marschall M, Ray B, Ray S. Synthesis, molecular features and biological activities of modified plant polysaccharides. Carbohydr Polym 2022; 289:119299. [DOI: 10.1016/j.carbpol.2022.119299] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2022] [Revised: 02/23/2022] [Accepted: 02/24/2022] [Indexed: 12/17/2022]
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Matsuo M, Nadanaka S, Soga M, Sugiyama T, Serigano S, Shimano K, Ichinose F, Nakamura T, Maeda T, Houkin K, Era T, Kitagawa H. Vulnerability to shear stress caused by altered peri-endothelial matrix is a key feature of Moyamoya disease. Sci Rep 2021; 11:1552. [PMID: 33452387 PMCID: PMC7810726 DOI: 10.1038/s41598-021-81282-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2020] [Accepted: 12/28/2020] [Indexed: 02/06/2023] Open
Abstract
Moyamoya disease (MMD) is characterized by progressive bilateral stenotic changes in the terminal portion of the internal carotid arteries. Although RNF213 was identified as a susceptibility gene for MMD, the exact pathogenesis remains unknown. Immunohistochemical analysis of autopsy specimens from a patient with MMD revealed marked accumulation of hyaluronan and chondroitin sulfate (CS) in the thickened intima of occlusive lesions of MMD. Hyaluronan synthase 2 was strongly expressed in endothelial progenitor cells in the thickened intima. Furthermore, MMD lesions showed minimal staining for CS and hyaluronan in the endothelium, in contrast to control endothelium showing positive staining for both. Glycosaminoglycans of endothelial cells derived from MMD and control induced pluripotent stem cells demonstrated a decreased amount of CS, especially sulfated CS, in MMD. A computational fluid dynamics model showed highest wall shear stress values in the terminal portion of the internal carotid artery, which is the predisposing region in MMD. Because the peri-endothelial extracellular matrix plays an important role in protection, cell adhesion and migration, an altered peri-endothelial matrix in MMD may contribute to endothelial vulnerability to wall shear stress. Invading endothelial progenitor cells repairing endothelial injury would produce excessive hyaluronan and CS in the intima, and cause vascular stenosis.
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Affiliation(s)
- Muneaki Matsuo
- Department of Pediatrics, Faculty of Medicine, Saga University, 5-1-1 Nabeshima, Saga, 849-8501, Japan.
| | - Satomi Nadanaka
- Laboratory of Biochemistry, Kobe Pharmaceutical University, Kobe, Japan
| | - Minami Soga
- Department of Cell Modulation, Institute of Molecular Embryology and Genetics, Kumamoto University, Kumamoto, Japan
| | - Taku Sugiyama
- Department of Neurosurgery, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - Shota Serigano
- Department of Mechanical Systems Engineering, Faculty of Engineering, Tokyo City University, Setagaya, Japan
| | - Kenjiro Shimano
- Department of Mechanical Systems Engineering, Faculty of Engineering, Tokyo City University, Setagaya, Japan
| | - Fumio Ichinose
- Department of Pediatrics, Faculty of Medicine, Saga University, 5-1-1 Nabeshima, Saga, 849-8501, Japan
| | - Takuji Nakamura
- Department of Pediatrics, Faculty of Medicine, Saga University, 5-1-1 Nabeshima, Saga, 849-8501, Japan
| | - Toshiyuki Maeda
- Department of Pediatrics, Faculty of Medicine, Saga University, 5-1-1 Nabeshima, Saga, 849-8501, Japan
| | - Kiyohiro Houkin
- Department of Neurosurgery, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - Takumi Era
- Department of Cell Modulation, Institute of Molecular Embryology and Genetics, Kumamoto University, Kumamoto, Japan
| | - Hiroshi Kitagawa
- Laboratory of Biochemistry, Kobe Pharmaceutical University, Kobe, Japan
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Sasaki N, Hirabayashi K, Michishita M, Takahashi K, Hasegawa F, Gomi F, Itakura Y, Nakamura N, Toyoda M, Ishiwata T. Ganglioside GM2, highly expressed in the MIA PaCa-2 pancreatic ductal adenocarcinoma cell line, is correlated with growth, invasion, and advanced stage. Sci Rep 2019; 9:19369. [PMID: 31852956 PMCID: PMC6920443 DOI: 10.1038/s41598-019-55867-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2019] [Accepted: 12/03/2019] [Indexed: 12/28/2022] Open
Abstract
Gangliosides, a group of glycosphingolipids, are known to be cell surface markers and functional factors in several cancers. However, the association between gangliosides and pancreatic ductal adenocarcinoma (PDAC) has not been well elucidated. In this study, we examined the expression and roles of ganglioside GM2 in PDAC. GM2+ cells showed a higher growth rate than GM2− cells in the adherent condition. When GM2– and GM2+ cells were cultured three-dimensionally, almost all cells in the spheres expressed GM2, including cancer stem cell (CSC)-like cells. A glycolipid synthesis inhibitor reduced GM2 expression and TGF-β1 signaling in these CSC-like cells, presumably by inhibiting the interaction between GM2 and TGFβ RII and suppressing invasion. Furthermore, suppression of GM2 expression by MAPK inhibition also reduced TGF-β1 signaling and suppressed invasion. GM2+ cells formed larger subcutaneous tumors at a high incidence in nude mice than did GM2– cells. In PDAC cases, GM2 expression was significantly associated with younger age, larger tumor size, advanced stage and higher histological grade. These findings suggest that GM2 could be used as a novel diagnostic and therapeutic target for PDAC.
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Affiliation(s)
- Norihiko Sasaki
- Research Team for Geriatric Medicine (Vascular Medicine), Tokyo Metropolitan Institute of Gerontology, Tokyo, 173-0015, Japan.
| | - Kenichi Hirabayashi
- Department of Pathology, Tokai University School of Medicine, Kanagawa, 259-1193, Japan
| | - Masaki Michishita
- Department of Veterinary Pathology, School of Veterinary Medicine, Nippon Veterinary and Life Science University, Tokyo, 180-8602, Japan
| | - Kimimasa Takahashi
- Department of Veterinary Pathology, School of Veterinary Medicine, Nippon Veterinary and Life Science University, Tokyo, 180-8602, Japan
| | - Fumio Hasegawa
- Division of Aging and Carcinogenesis, Research Team for Geriatric Pathology, Tokyo Metropolitan Institute of Gerontology, Tokyo, 173-0015, Japan
| | - Fujiya Gomi
- Division of Aging and Carcinogenesis, Research Team for Geriatric Pathology, Tokyo Metropolitan Institute of Gerontology, Tokyo, 173-0015, Japan
| | - Yoko Itakura
- Research Team for Geriatric Medicine (Vascular Medicine), Tokyo Metropolitan Institute of Gerontology, Tokyo, 173-0015, Japan
| | - Naoya Nakamura
- Department of Pathology, Tokai University School of Medicine, Kanagawa, 259-1193, Japan
| | - Masashi Toyoda
- Research Team for Geriatric Medicine (Vascular Medicine), Tokyo Metropolitan Institute of Gerontology, Tokyo, 173-0015, Japan
| | - Toshiyuki Ishiwata
- Division of Aging and Carcinogenesis, Research Team for Geriatric Pathology, Tokyo Metropolitan Institute of Gerontology, Tokyo, 173-0015, Japan.
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Koike K, Berdyshev EV, Mikosz AM, Bronova IA, Bronoff AS, Jung JP, Beatman EL, Ni K, Cao D, Scruggs AK, Serban KA, Petrache I. Role of Glucosylceramide in Lung Endothelial Cell Fate and Emphysema. Am J Respir Crit Care Med 2019; 200:1113-1125. [PMID: 31265321 PMCID: PMC6888657 DOI: 10.1164/rccm.201812-2311oc] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Accepted: 07/02/2019] [Indexed: 12/13/2022] Open
Abstract
Rationale: The loss of pulmonary endothelial cells in emphysema is associated with increased lung ceramide. Ceramide perturbations may cause adaptive alterations in other bioactive sphingolipids, with pathogenic implications. We previously reported a negative correlation between emphysema and circulating glycosphingolipids (GSLs). Glucosylceramide (GlcCer), the initial GSL synthesized from ceramide by GCS (GlcCer synthase), is required for embryonic survival, but its role in the lung is unknown.Objectives: To determine if cigarette smoke (CS) alters lung GlcCer and to elucidate the role of GCS in lung endothelial cell fate.Methods: GlcCer was measured by tandem mass spectrometry in BAL fluid of CS- or elastase-exposed mice, and GCS was detected by Western blotting in chronic obstructive pulmonary disease lungs and CS extract-exposed primary human lung microvascular endothelial cells (HLMVECs). The role of GlcCer and GCS on mTOR (mammalian target of rapamycin) signaling, autophagy, lysosomal function, and cell death were studied in HLMVECs with or without CS exposure.Measurements and Main Results: Mice exposed to chronic CS or to elastase, and patients with chronic obstructive pulmonary disease, exhibited significantly decreased lung GlcCer and GCS. In mice, lung GlcCer levels were negatively correlated with airspace size. GCS inhibition in HLMVEC increased lysosomal pH, suppressed mTOR signaling, and triggered autophagy with impaired lysosomal degradation and apoptosis, recapitulating CS effects. In turn, increasing GlcCer by GCS overexpression in HLMVEC improved autophagic flux and attenuated CS-induced apoptosis.Conclusions: Decreased GSL production in response to CS may be involved in emphysema pathogenesis, associated with autophagy with impaired lysosomal degradation and lung endothelial cell apoptosis.
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Affiliation(s)
- Kengo Koike
- Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, National Jewish Health, Denver, Colorado; and
| | - Evgeny V. Berdyshev
- Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, National Jewish Health, Denver, Colorado; and
| | - Andrew M. Mikosz
- Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, National Jewish Health, Denver, Colorado; and
| | - Irina A. Bronova
- Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, National Jewish Health, Denver, Colorado; and
| | - Anna S. Bronoff
- Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, National Jewish Health, Denver, Colorado; and
| | - John P. Jung
- Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, National Jewish Health, Denver, Colorado; and
| | - Erica L. Beatman
- Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, National Jewish Health, Denver, Colorado; and
| | - Kevin Ni
- Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, National Jewish Health, Denver, Colorado; and
| | - Danting Cao
- Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, National Jewish Health, Denver, Colorado; and
- Pharmacology Graduate Program and
| | - April K. Scruggs
- Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, National Jewish Health, Denver, Colorado; and
| | - Karina A. Serban
- Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, National Jewish Health, Denver, Colorado; and
- Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado
| | - Irina Petrache
- Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, National Jewish Health, Denver, Colorado; and
- Pharmacology Graduate Program and
- Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado
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Gangliosides Contribute to Vascular Insulin Resistance. Int J Mol Sci 2019; 20:ijms20081819. [PMID: 31013778 PMCID: PMC6515378 DOI: 10.3390/ijms20081819] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Revised: 03/23/2019] [Accepted: 04/11/2019] [Indexed: 12/19/2022] Open
Abstract
Insulin in physiological concentrations is important to maintain vascular function. Moreover, vascular insulin resistance contributes to vascular impairment. In the elderly, other factors including hypertension, dyslipidemia, and chronic inflammation amplify senescence of vascular endothelial and smooth muscle cells. In turn, senescence increases the risk for vascular-related diseases such as arteriosclerosis, diabetes, and Alzheimer's disease. Recently, it was found that GM1 ganglioside, one of the glycolipids localized on the cell membrane, mediates vascular insulin resistance by promoting senescence and/or inflammatory stimulation. First, it was shown that increased GM1 levels associated with aging/senescence contribute to insulin resistance in human aortic endothelial cells (HAECs). Second, the expression levels of gangliosides were monitored in HAECs treated with different concentrations of tumor necrosis factor-alpha (TNFα) for different time intervals to mimic in vivo acute or chronic inflammatory conditions. Third, the levels of insulin signaling-related molecules were monitored in HAECs after TNFα treatment with or without inhibitors of ganglioside synthesis. In this review, we summarize the molecular mechanisms of insulin resistance in aged/senescent and TNFα-stimulated endothelial cells mediated by gangliosides and highlight the possible roles of gangliosides in vascular insulin resistance-related diseases.
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Sasaki N, Itakura Y, Toyoda M. Ganglioside GM1 contributes to extracellular/intracellular regulation of insulin resistance, impairment of insulin signaling and down-stream eNOS activation, in human aortic endothelial cells after short- or long-term exposure to TNFα. Oncotarget 2018; 9:5562-5577. [PMID: 29464018 PMCID: PMC5814158 DOI: 10.18632/oncotarget.23726] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2017] [Accepted: 10/15/2017] [Indexed: 12/16/2022] Open
Abstract
Vascular insulin resistance induced by inflammatory cytokines leads to the initiation and development of vascular diseases. In humans, circulating TNFα levels are increased during aging, suggesting a correlation between vascular insulin resistance and plasma TNFα levels. Currently, the precise molecular mechanisms of vascular insulin resistance mediated by TNFα are not well characterized. We aimed at clarifying whether glycosphingolipids contribute to vascular insulin resistance after inflammatory stimulation. In this study, we examined vascular insulin resistance using human aortic endothelial cells after treatment with different concentrations of TNFα for different time intervals for mimicking in vivo acute or chronic inflammatory situations. We show that ganglioside GM1 levels on cell membranes change depending on time of exposure to TNFα and its concentration and that the GM1 expression is associated with specific extracellular/intracellular regulation of the insulin signaling cascade. Furthermore, we provide evidence that factors such as aging and senescence affect the regulation of insulin resistance. Our data suggest that GM1 is a key player in the induction of vascular insulin resistance after short- or long-term exposure to TNFα and is a good extracellular target for prevention and cure of vascular diseases.
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Affiliation(s)
- Norihiko Sasaki
- Research Team for Geriatric Medicine, Vascular Medicine, Tokyo Metropolitan Institute of Gerontology, Sakaecho 35-2, Itabashi-Ku, Tokyo 173-0015, Japan
| | - Yoko Itakura
- Research Team for Geriatric Medicine, Vascular Medicine, Tokyo Metropolitan Institute of Gerontology, Sakaecho 35-2, Itabashi-Ku, Tokyo 173-0015, Japan
| | - Masashi Toyoda
- Research Team for Geriatric Medicine, Vascular Medicine, Tokyo Metropolitan Institute of Gerontology, Sakaecho 35-2, Itabashi-Ku, Tokyo 173-0015, Japan
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Zhuge Z, Dong Y, Li L, Jin T. Effects of astragalus polysaccharide on the adhesion-related immune response of endothelial cells stimulated with CSFV in vitro. PeerJ 2017; 5:e3862. [PMID: 29018607 PMCID: PMC5633024 DOI: 10.7717/peerj.3862] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2017] [Accepted: 09/07/2017] [Indexed: 01/01/2023] Open
Abstract
Background Astragalus polysaccharide (APS) has immunomodulatory activities on porcine peripheral blood mononuclear cells. The immunomodulatory effects of APS on porcine endothelial cells (ECs) expose to classical swine fever virus (CSFV) remain unknown. Methods The virus was titrated using an indirect immune biotin enzyme standard method to confirm that porcine ECs were susceptible to CSFV infection and to determine the TCID50 of CSFV (C-strain). Porcine ECs were cultured with CSFV in the presence of APS. Relative quantitative PCR was used to assess the mRNA expression of factors that influence EC adhesion and immunity. Results The expression of adhesion factors mRNA increased following stimulation with CSFV; this effect was inhibited by pre-exposing the cells to APS. In addition, the expression of growth factors and some immune factors increased after infection with CSFV; this increase in tissue factor (TF), transforming growth factor (TGF-β), and interleukin-8 (IL-8) could be inhibited by the addition of APS. The immune response mediated by Toll-like receptor 4 (TLR4) in ECs may be unregulated by CSFV as it was also inhibited by pre-treatment with APS. Discussion The addition of APS to the culture can obviously regulate the expression of molecules related to the adhesion, growth, and immune response of ECs, as well as the production of cytokines. Therefore, it may have the potential to be an effective component in vaccines against CSFV.
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Affiliation(s)
- Zengyu Zhuge
- Animal Science and Veterinary Medicine College, Tianjin Agricultural University, Tianjin, China
| | - Yanpeng Dong
- College of Forestry, Henan Agricultural University, Zhengzhou, Henan, China
| | - Liuan Li
- Animal Science and Veterinary Medicine College, Tianjin Agricultural University, Tianjin, China
| | - Tianming Jin
- Animal Science and Veterinary Medicine College, Tianjin Agricultural University, Tianjin, China
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Čejková S, Králová Lesná I, Poledne R. Monocyte adhesion to the endothelium is an initial stage of atherosclerosis development. COR ET VASA 2016. [DOI: 10.1016/j.crvasa.2015.08.002] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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11
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de Souza Lins Borba FK, Felix GLQ, Costa EVL, Silva L, Dias PF, de Albuquerque Nogueira R. Fractal analysis of extra-embryonic vessels of chick embryos under the effect of glucosamine and chondroitin sulfates. Microvasc Res 2016; 105:114-8. [DOI: 10.1016/j.mvr.2016.02.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2015] [Revised: 02/07/2016] [Accepted: 02/08/2016] [Indexed: 11/30/2022]
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Karav S, Bell JMLNDM, Le Parc A, Liu Y, Mills DA, Block DE, Barile D. Characterizing the release of bioactive N-glycans from dairy products by a novel endo-β-N-acetylglucosaminidase. Biotechnol Prog 2015; 31:1331-9. [PMID: 26097235 DOI: 10.1002/btpr.2135] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2015] [Revised: 06/17/2015] [Indexed: 01/05/2023]
Abstract
Endo-β-N-acetylglucosaminidase isolated from B. infantis ATCC 15697 (EndoBI-1) is a novel enzyme that cleaves N-N'-diacetyl chitobiose moieties found in the N-glycan core of high mannose, hybrid, and complex N-glycans. These conjugated N-glycans are recently shown as a new prebiotic source that stimulates the growth of a key infant gut microbe, Bifidobacterium longum subsp. Infantis. The effects of pH (4.45-8.45), temperature (27.5-77.5°C), reaction time (15-475 min), and enzyme/protein ratio (1:3,000-1:333) were evaluated on the release of N-glycans from bovine colostrum whey by EndoBI-1. A central composite design was used, including a two-level factorial design (2(4)) with four center points and eight axial points. In general, low pH values, longer reaction times, higher enzyme/protein ratio, and temperatures around 52°C resulted in the highest yield. The results demonstrated that bovine colostrum whey, considered to be a by/waste product, can be used as a glycan source with a yield of 20 mg N-glycan/g total protein under optimal conditions for the ranges investigated. Importantly, these processing conditions are suitable to be incorporated into routine dairy processing activities, opening the door for an entirely new class of products (released bioactive glycans and glycan-free milk). The new enzyme's activity was also compared with a commercially available enzyme, showing that EndoBI-1 is more active on native proteins than PNGase F and can be efficiently used during pasteurization, streamlining its integration into existing processing strategies.
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Affiliation(s)
- Sercan Karav
- Dept. of Food Science and Technology, University of California, One Shields Avenue, Davis, CA, 95616
| | | | - Annabelle Le Parc
- Dept. of Food Science and Technology, University of California, One Shields Avenue, Davis, CA, 95616
| | - Yan Liu
- Dept. of Food Science and Technology, University of California, One Shields Avenue, Davis, CA, 95616
| | - David A Mills
- Dept. of Food Science and Technology, University of California, One Shields Avenue, Davis, CA, 95616.,Foods for Health Institute, University of California, One Shields Avenue, Davis, CA, 95616.,Dept. of Viticulture and Enology, University of California, Davis, CA, 95616
| | - David E Block
- Dept. of Viticulture and Enology, University of California, Davis, CA, 95616.,Dept. of Chemical Engineering and Materials Science, University of California, Davis, CA, 95616
| | - Daniela Barile
- Dept. of Food Science and Technology, University of California, One Shields Avenue, Davis, CA, 95616.,Foods for Health Inst., University of California, One Shields Avenue, Davis, CA, 95616
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