1
|
Poly (ADP-ribose) polymerase: An Overview of Mechanistic Approaches and Therapeutic Opportunities in the Management of Stroke. Neurochem Res 2022; 47:1830-1852. [PMID: 35437712 DOI: 10.1007/s11064-022-03595-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Revised: 03/30/2022] [Accepted: 03/31/2022] [Indexed: 10/18/2022]
Abstract
Stroke is one of the leading causes of morbidity and mortality accompanied by blood supply loss to a particular brain area. Several mechanistic approaches such as inhibition of poly (ADP-ribose) polymerase, therapies against tissue thrombosis, and neutrophils lead to stroke's therapeutic intervention. Evidence obtained with the poly (ADP-ribose) polymerase (PARP) inhibition and animals having a deficiency of PARP enzymes; represented the role of PARP in cerebral stroke, ischemia/reperfusion, and neurotrauma. PARP is a nuclear enzyme superfamily with various isoforms, each with different structural domains and functions, and out of all, PARP-1 is the best-characterized member. It has been shown to perform multiple physiological as well as pathological processes, including its role in inflammation, oxidative stress, apoptosis, and mitochondrial dysfunction. The enzyme interacts with NF-κB, p53, and other transcriptional factors to regulate survival and cell death and modulates multiple downstream signaling pathways. Clinical trials have also been conducted using PARP inhibitors for numerous disorders and have shown positive results. However, additional information is yet to be established for the therapeutic intervention of PARP inhibitors in stroke. These agents' utilization appears to be challenging due to their unknown potential long-term side effects. PARP activity increased during ischemia, but its inhibition provided significant neuroprotection. Despite the increased interest in PARP as a pharmacological modulator for novel therapeutic therapies, the current review focused on stroke and poly ADP-ribosylation.
Collapse
|
2
|
Sharma P, Liu Chung Ming C, Wang X, Bienvenu LA, Beck D, Figtree GA, Boyle A, Gentile C. Biofabrication of advanced in vitro3D models to study ischaemic and doxorubicin-induced myocardial damage. Biofabrication 2022; 14. [PMID: 34983029 DOI: 10.1088/1758-5090/ac47d8] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Accepted: 01/04/2022] [Indexed: 11/11/2022]
Abstract
Current preclinicalin vitroandin vivomodels of cardiac injury typical of myocardial infarction (MI, or heart attack) and drug induced cardiotoxicity mimic only a few aspects of these complex scenarios. This leads to a poor translation of findings from the bench to the bedside. In this study, we biofabricated for the first time advancedin vitromodels of MI and doxorubicin (DOX) induced injury by exposing cardiac spheroids (CSs) to pathophysiological changes in oxygen (O2) levels or DOX treatment. Then, contractile function and cell death was analyzed in CSs in control versus I/R and DOX CSs. For a deeper dig into cell death analysis, 3D rendering analyses and mRNA level changes of cardiac damage-related genes were compared in control versus I/R and DOX CSs. Overall,in vitroCSs recapitulated major features typical of thein vivoMI and drug induced cardiac damages, such as adapting intracellular alterations to O2concentration changes and incubation with cardiotoxic drug, mimicking the contraction frequency and fractional shortening and changes in mRNA expression levels for genes regulating sarcomere structure, calcium transport, cell cycle, cardiac remodelling and signal transduction. Taken together, our study supports the use of I/R and DOX CSs as advancedin vitromodels to study MI and DOX-induced cardiac damage by recapitulating their complex in vivoscenario.
Collapse
Affiliation(s)
- Poonam Sharma
- The University of Newcastle Faculty of Health and Medicine, Kookaburra Cct, New Lambton Heights, New South Wales, 2305, AUSTRALIA
| | - Clara Liu Chung Ming
- University of Technology Sydney Faculty of Engineering, Building 11, Level 10, Room 115, University of Technology Sydney, Ultimo, Sydney, Ultimo, Sydney, New South Wales, 2007, AUSTRALIA
| | - Xiaowei Wang
- Baker Heart and Diabetes Institute South Australia, 75 Commercial Road, Melbourne, Victoria, 3004, AUSTRALIA
| | - Laura A Bienvenu
- Baker Heart and Diabetes Institute South Australia, 75 Commercial Road, Melbourne, Victoria, 3004, AUSTRALIA
| | - Domink Beck
- University of Technology Sydney Faculty of Engineering, Building 11, Level 10, Room 115, University of Technology Sydney, Ultimo, Sydney, Ultimo, Sydney, New South Wales, 2007, AUSTRALIA
| | - Gemma A Figtree
- , The University of Sydney Faculty of Medicine and Health, Reserve Rd, Sydney, New South Wales, 2000, AUSTRALIA
| | - Andrew Boyle
- The University of Newcastle Faculty of Health and Medicine, Kookaburra Cct, New Lambton Heights, New South Wales, 2305, AUSTRALIA
| | - Carmine Gentile
- University of Technology Sydney Faculty of Engineering, Building 11, Level 10, Room 115, 81 Broadway St, Ultimo, Sydney, Ultimo, Sydney, New South Wales, 2007, AUSTRALIA
| |
Collapse
|
3
|
Altered expression of activator proteins that control follicle reserve after ovarian tissue cryopreservation/transplantation and primordial follicle loss prevention by rapamycin. J Assist Reprod Genet 2020; 37:2119-2136. [PMID: 32651677 DOI: 10.1007/s10815-020-01875-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Accepted: 06/29/2020] [Indexed: 12/16/2022] Open
Abstract
PURPOSE We investigated whether expression of activator proteins that control follicle reserve and growth change after ovarian tissue vitrification and re-transplantation. Moreover, we assessed whether inhibition of mTOR signaling pathway by rapamycin would protect primordial follicle reserve after ovarian tissue freezing/thawing and re-transplantation. METHODS Fresh control, frozen/thawed, fresh-transplanted, frozen/thawed and transplanted, rapamycin/control, rapamycin fresh-transplanted, and rapamycin frozen-thawed and transplanted groups were established in rats. After freezing and thawing process, two ovaries were transplanted into the back muscle of the same rat. After 2 weeks, grafts were harvested, fixed, and embedded into paraffin block. Normal and atretic primordial/growing follicle count was performed in all groups. Ovarian tissues were evaluated for the dynamic expressions of Gdf-9, Bmp-15, KitL, Lif, Fgf-2, and p-s6K using immunohistochemistry, and H-score analyses were done. RESULTS Primordial follicle reserve reduced almost 50% after ovarian tissue re-transplantation. Expression of Gdf-9 and Lif increased significantly in primordial and growing follicles in frozen-thawed, fresh-transplanted, and frozen/thawed and transplanted groups, whereas expression of Bmp-15, KitL, and Fgf-2 decreased in primordial follicles. Freezing and thawing of ovarian tissue solely significantly increased p-s6K expression in primordial follicles, and on the other hand, suppression of mTORC1 pathway using rapamycin preserved the primordial follicle pool. CONCLUSION Altered expressions of activator proteins that regulate primordial follicle reserve and growth may lead to primordial follicle loss and rapamycin treatment can protect ovarian reserve after ovarian tissue cryopreservation/transplantation.
Collapse
|
4
|
Zhai C, Lv J, Wang K, Li Q, Qu Y. HSP70 silencing aggravates apoptosis induced by hypoxia/reoxygenation in vitro. Exp Ther Med 2019; 18:1013-1020. [PMID: 31363363 PMCID: PMC6614734 DOI: 10.3892/etm.2019.7697] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2018] [Accepted: 02/28/2019] [Indexed: 01/09/2023] Open
Abstract
Lung ischemia-reperfusion can cause acute lung injury, which is closely associated with apoptosis. Heat shock protein 70 (HSP70) is an anti-apoptotic protein that promotes cell survival under a variety of different stress conditions. However, the role and mechanism of HSP70 in lung ischemia-reperfusion injury is yet to be fully elucidated. In the present study, an in vitro hypoxia/reoxygenation model of A549 cells was established to simulate lung ischemia-reperfusion and HSP70 was silenced by transfecting A549 cells with an shRNA sequence targeting HSP70. Western blotting, reverse transcription-quantitative polymerase chain reaction, Cell Counting kit-8 and flow cytometry were used to detect protein levels, RNA expression, cell activity and apoptosis. The results revealed that silencing HSP70 reduced cell viability, aggravated apoptosis, increased lactate dehydrogenase levels and induced a G2/M blockade in a hypoxia-reoxygenation A549 cell model. Furthermore, silencing HSP70 decreased the phosphorylation levels of protein kinase B (AKT) and extracellular signal-regulated kinase (ERK); however, the total AKT and ERK levels did not change significantly. Pretreating A549 cells with the AKT pathway inhibitor, LY294002 and the ERK pathway inhibitor, U0216 led to a decrease in HSP70 expression. These results indicate that silencing HSP70 may aggravate apoptosis in hypoxia-reoxygenation cell models, potentially via the mitogen-activated protein kinase/ERK and phosphoinositide 3-kinase/AKT signaling pathways.
Collapse
Affiliation(s)
- Congying Zhai
- Intensive Care Unit, Affiliated Qingdao Municipal Hospital of Qingdao University, Qingdao, Shandong 266071, P.R. China.,Department of Respiratory Medicine, Zibo First Hospital, Zibo, Shandong 255200, P.R. China
| | - Jiling Lv
- Department of Respiratory Medicine, Zibo First Hospital, Zibo, Shandong 255200, P.R. China
| | - Keke Wang
- Department of Emergency, Affiliated Qingdao Municipal Hospital of Qingdao University, Qingdao, Shandong 266071, P.R. China
| | - Qingshu Li
- Intensive Care Unit, Affiliated Qingdao Municipal Hospital of Qingdao University, Qingdao, Shandong 266071, P.R. China
| | - Yan Qu
- Intensive Care Unit, Affiliated Qingdao Municipal Hospital of Qingdao University, Qingdao, Shandong 266071, P.R. China
| |
Collapse
|
5
|
Ischia J, Bolton DM, Patel O. Why is it worth testing the ability of zinc to protect against ischaemia reperfusion injury for human application. Metallomics 2019; 11:1330-1343. [PMID: 31204765 DOI: 10.1039/c9mt00079h] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Ischaemia (interruption in the blood/oxygen supply) and subsequent damage induced by reperfusion (restoration of blood/oxygen supply) ultimately leads to cell death, tissue injury and permanent organ dysfunction. The impact of ischaemia reperfusion injury (IRI) is not limited to heart attack and stroke but can be extended to patients undergoing surgeries such as partial nephrectomy for renal cancer, liver resection for colorectal cancer liver metastasis, cardiopulmonary bypass, and organ transplantation. Unfortunately, there are no drugs that can protect organs against the inevitable peril of IRI. Recent data show that a protocol incorporating specific Zn formulation, dosage, number of dosages, time of injection, and mode of Zn delivery (intravenous) and testing of efficacy in a large preclinical sheep model of IRI strongly supports human trials of Zn preconditioning. No doubt, scepticism still exists among funding bodies and research fraternity on whether Zn, a naturally occurring metal, will work where everything else has failed. Therefore, in this article, we review the conflicting evidence on the promoter and protector role of Zn in the case of IRI and highlight factors that may help explain the contradictory evidence. Finally, we review the literature related to the knowledge of Zn's mechanism of action on ROS generation, apoptosis, HIF activation, inflammation, and signal transduction pathways, which highlight Zn's likelihood of success compared to various other interventions targeting IRI.
Collapse
Affiliation(s)
- Joseph Ischia
- Department of Surgery, The University of Melbourne, Austin Health, Studley Rd., Heidelberg, Victoria 3084, Australia. and Department of Urology, Austin Health, Heidelberg, Victoria, Australia
| | - Damien M Bolton
- Department of Surgery, The University of Melbourne, Austin Health, Studley Rd., Heidelberg, Victoria 3084, Australia. and Department of Urology, Austin Health, Heidelberg, Victoria, Australia
| | - Oneel Patel
- Department of Surgery, The University of Melbourne, Austin Health, Studley Rd., Heidelberg, Victoria 3084, Australia.
| |
Collapse
|
6
|
Miranda CTCBCD, Fagundes DJ, Miranda ED, Simões RS, Taha MO. The role of ischemic preconditioning in gene expression related to inflammation in a rat model of intestinal ischemia-reperfusion injury. Acta Cir Bras 2019; 33:1095-1102. [PMID: 30624515 DOI: 10.1590/s0102-865020180120000007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2018] [Accepted: 11/08/2018] [Indexed: 12/11/2022] Open
Abstract
PURPOSE To investigate the gene expression related to inflammation on mice subjected to intestinal ischemia and reperfusion (I/R) and treated with ischemic preconditioning (IPC). METHODS Thirty rats (EPM-Wistar), distributed in five groups of six animals each, were underwent anesthesia and laparotomy. The ischemia time was standardized in 60 minutes and the reperfusion time 120 minutes. IPC was standardized in 5 minutes of ischemia followed by 10 minutes of reperfusion accomplished before I/R. The control group was submitted only to anesthesia and laparotomy. The other groups were submitted to ischemia, I/R, ischemia + IPC and I/R + IPC. It was collected a small intestine sample to analyses by Quantitative Polymerase Chain Reaction in real Time (RT-qPCR) and histological analyses. It was studied 27 genes. RESULTS The groups that received IPC presented downregulation of genes, observed in of genes in IPC+ischemia group and IPC+I/R group. Data analysis by clusters showed upregulation in I/R group, however in IPC groups occurred downregulation of genes related to inflammation. CONCLUSION The ischemia/reperfusion promoted upregulation of genes related to inflammation, while ischemic preconditioning promoted downregulation of these genes.
Collapse
Affiliation(s)
| | - Djalma José Fagundes
- PhD, Full Professor, Division of Surgical Techniques and Experimental Surgery, Department of Surgery, Universidade Federal de São Paulo (UNIFESP), Brazil. Manuscript preparation and writing
| | - Edinaldo de Miranda
- PhD, Assistant Professor, Medical School, UESPI, Teresina-PI, Brazil. Acquisition of data, manuscript preparation and writing
| | - Ricardo Santos Simões
- PhD, Department of Morphology and Genetic, UNIFESP, Sao Paulo-SP, Brazil. Manuscript preparation and writing
| | - Murched Omar Taha
- PhD, Associated Professor, Surgical Technique and Experimental Surgery, UNIFESP, Sao Paulo-SP, Brazil. Manuscript preparation, final approval
| |
Collapse
|
7
|
Celik S, Celikkan FT, Ozkavukcu S, Can A, Celik-Ozenci C. Expression of inhibitor proteins that control primordial follicle reserve decreases in cryopreserved ovaries after autotransplantation. J Assist Reprod Genet 2018; 35:615-626. [PMID: 29497951 DOI: 10.1007/s10815-018-1140-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2017] [Accepted: 02/14/2018] [Indexed: 01/12/2023] Open
Abstract
PURPOSE Even with 86 live births reported globally so far, the mechanism of primordial follicle loss following autotransplantation of the frozen-thawed ovarian tissue needs further evaluation. Pten, Tsc1, p27, and Amh are the inhibitor proteins that play crucial roles in suppressing the transition from the primordial follicle to primary state, maintaining the primordial follicle reserve. In this study, we aimed to evaluate whether the expression patterns of these proteins change and it may be related to the global primordial follicle loss after autotransplantation of the frozen-thawed ovarian tissue. METHODS Four groups were established in rats: fresh-control, frozen/thawed, fresh-transplanted, and frozen/thawed and transplanted. After slow freezing and thawing process, two ovarian pieces were transplanted into the back muscle of the same rat. After 2 weeks, grafts were harvested, fixed, and embedded into the paraffin block. Normal and atretic primordial/growing follicle count was performed in all groups. Ovarian tissues were evaluated for the dynamic expressions of the Pten, Tsc1, p27, and Amh proteins using immunohistochemistry, and H-score analyses were done. RESULTS Ovarian tissue cryopreservation does not change the expression patterns of inhibitory proteins that control ovarian reserve. Both in fresh and frozen/thawed autotransplanted groups, the expression of inhibitory proteins and Amh decreased significantly in primordial follicles and in growing follicles, respectively. In control group and in frozen/thawed group, primordial follicle counts were similar but decreased by almost half in both fresh-transplanted and frozen/thawed and transplanted groups. CONCLUSIONS One of the causes of primordial follicle loss after transplantation of ovarian graft may be decreased expression of the inhibitory proteins that guard the ovarian reserve and transplantation itself seems to be the major cause for disruption of inhibitory molecular signaling. Our findings highlight important molecular aspects for future clinical applications for fertility preservation in humans.
Collapse
Affiliation(s)
- Soner Celik
- Department of Histology and Embryology, School of Medicine, Akdeniz University, Campus, 07070, Antalya, Turkey
| | - Ferda Topal Celikkan
- Department of Histology and Embryology, Ankara University School of Medicine, 06100, Ankara, Turkey
| | - Sinan Ozkavukcu
- Department of Obstetrics and Gynecology, Centre for Assisted Reproduction, School of Medicine, Ankara University, 06100, Ankara, Turkey
| | - Alp Can
- Department of Histology and Embryology, Ankara University School of Medicine, 06100, Ankara, Turkey
| | - Ciler Celik-Ozenci
- Department of Histology and Embryology, School of Medicine, Akdeniz University, Campus, 07070, Antalya, Turkey.
| |
Collapse
|
8
|
Wang K, Wen S, Jiao J, Tang T, Zhao X, Zhang M, Lv B, Lu Y, Zhou X, Li J, Nie S, Liao Y, Wang Q, Tu X, Mallat Z, Xia N, Cheng X. IL-21 promotes myocardial ischaemia/reperfusion injury through the modulation of neutrophil infiltration. Br J Pharmacol 2017; 175:1329-1343. [PMID: 28294304 DOI: 10.1111/bph.13781] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2016] [Revised: 02/07/2017] [Accepted: 03/03/2017] [Indexed: 02/04/2023] Open
Abstract
BACKGROUND AND PURPOSE The immune system plays an important role in driving the acute inflammatory response following myocardial ischaemia/reperfusion injury (MIRI). IL-21 is a pleiotropic cytokine with multiple immunomodulatory effects, but its role in MIRI is not known. EXPERIMENTAL APPROACH Myocardial injury, neutrophil infiltration and the expression of neutrophil chemokines KC (CXCL1) and MIP-2 (CXCL2) were studied in a mouse model of MIRI. Effects of IL-21 on the expression of KC and MIP-2 in neonatal mouse cardiomyocytes (CMs) and cardiac fibroblasts (CFs) were determined by real-time PCR and ELISA. The signalling mechanisms underlying these effects were explored by western blot analysis. KEY RESULTS IL-21 was elevated within the acute phase of murine MIRI. Neutralization of IL-21 attenuated myocardial injury, as illustrated by reduced infarct size, decreased cardiac troponin T levels and improved cardiac function, whereas exogenous IL-21 administration exerted opposite effects. IL-21 increased the infiltration of neutrophils and increased the expression of KC and MIP-2 in myocardial tissue following MIRI. Moreover, neutrophil depletion attenuated the IL-21-induced myocardial injury. Mechanistically, IL-21 increased the production of KC and MIP-2 in neonatal CMs and CFs, and enhanced neutrophil migration, as revealed by the migration assay. Furthermore, we demonstrated that this IL-21-mediated increase in chemokine expression involved the activation of Akt/NF-κB signalling in CMs and p38 MAPK/NF-κB signalling in CFs. CONCLUSIONS AND IMPLICATIONS Our data provide novel evidence that IL-21 plays a pathogenic role in MIRI, most likely by promoting cardiac neutrophil infiltration. Therefore, targeting IL-21 may have therapeutic potential as a treatment for MIRI. LINKED ARTICLES This article is part of a themed section on Spotlight on Small Molecules in Cardiovascular Diseases. To view the other articles in this section visit http://onlinelibrary.wiley.com/doi/10.1111/bph.v175.8/issuetoc.
Collapse
Affiliation(s)
- Kejing Wang
- Department of Cardiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Key Laboratory of Biological Targeted Therapy of Education Ministry and Hubei Province, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Shuang Wen
- Department of Cardiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Key Laboratory of Biological Targeted Therapy of Education Ministry and Hubei Province, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jiao Jiao
- Department of Cardiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Key Laboratory of Biological Targeted Therapy of Education Ministry and Hubei Province, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Tingting Tang
- Department of Cardiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Key Laboratory of Biological Targeted Therapy of Education Ministry and Hubei Province, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Xin Zhao
- Department of Cardiology, Beijing Anzhen Hospital, Capital Medical University, Beijing, China
| | - Min Zhang
- Department of Cardiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Key Laboratory of Biological Targeted Therapy of Education Ministry and Hubei Province, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Bingjie Lv
- Department of Cardiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Key Laboratory of Biological Targeted Therapy of Education Ministry and Hubei Province, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yuzhi Lu
- Department of Cardiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Key Laboratory of Biological Targeted Therapy of Education Ministry and Hubei Province, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Xingdi Zhou
- Department of Cardiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Key Laboratory of Biological Targeted Therapy of Education Ministry and Hubei Province, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jingyong Li
- Department of Cardiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Key Laboratory of Biological Targeted Therapy of Education Ministry and Hubei Province, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Shaofang Nie
- Department of Cardiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Key Laboratory of Biological Targeted Therapy of Education Ministry and Hubei Province, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yuhua Liao
- Department of Cardiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Key Laboratory of Biological Targeted Therapy of Education Ministry and Hubei Province, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Qing Wang
- Key Laboratory of Molecular Biophysics of the Ministry of Education, Cardio-X Institute, College of Life Science and Technology and Center of Human Genome Research, Huazhong University of Science and Technology, Wuhan, China
| | - Xin Tu
- Key Laboratory of Molecular Biophysics of the Ministry of Education, Cardio-X Institute, College of Life Science and Technology and Center of Human Genome Research, Huazhong University of Science and Technology, Wuhan, China
| | - Ziad Mallat
- Division of Cardiovascular Medicine, Department of Medicine, University of Cambridge, Cambridge, UK
| | - Ni Xia
- Department of Cardiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Key Laboratory of Biological Targeted Therapy of Education Ministry and Hubei Province, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Xiang Cheng
- Department of Cardiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Key Laboratory of Biological Targeted Therapy of Education Ministry and Hubei Province, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| |
Collapse
|
9
|
Qian Y, Cao L, Guan T, Chen L, Xin H, Li Y, Zheng R, Yu D. Protection by genistein on cortical neurons against oxidative stress injury via inhibition of NF-kappaB, JNK and ERK signaling pathway. PHARMACEUTICAL BIOLOGY 2015; 53:1124-1132. [PMID: 25715966 DOI: 10.3109/13880209.2014.962057] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
CONTEXT Genistein, one of the isoflavones derived from soybean seeds, has been reported to exert multiple bioactivities. However, the mechanism of its action on the central nervous system is not fully understood. OBJECTIVE To investigate the cytoprotection of genistein and its molecular mechanism against H2O2-induced cell death in primary rat cortical neurons. MATERIALS AND METHODS Genistein (0.01, 0.1, and 1 μM) were added into the primary rat neurons 24 h before and co-cultured with 500 μM H2O2 for 1 h. Neuronal injury was assessed by MTT, lactate dehydrogenase (LDH) assay, and Hoechst33258 staining. Intracellular reactive oxygen species (ROS) generation induced by H2O2 was determined. Neuronal apoptosis was evaluated by Bcl-2/Bax ratio as well as by caspase-9 and caspase-3 activities. The protein levels and phosphorylation of NF-κB/p65, IκB, JNK, and ERK were detected by western blots. RESULTS Genistein pretreatment attenuated H2O2-mediated neuronal viability loss, nuclear condensation, and ROS generation in a concentration-dependent manner. Genistein exerted anti-apoptotic effects by reversing the apoptotic factors Bcl-2 and Bax ratio, along with the suppression of caspase-9 and caspase-3 activities. In addition, genistein down-regulated the expression of NF-κB/p65, and suppressed the phosphorylation of p65 and IκB. Genistein also inhibited H2O2-induced activation of the MAPK-signaling pathway including JNK and ERK. DISCUSSION AND CONCLUSION The results indicated that genistein effectively protects cortical neurons against oxidative stress at least partly via inactivation of NF-κB as well as MAPK-signaling pathways, and suggested the possibility of this antioxidant for the prevention and treatment of stroke.
Collapse
Affiliation(s)
- Yisong Qian
- Institute of Translational Medicine, Nanchang University, Honggu District , Nanchang , PR China
| | | | | | | | | | | | | | | |
Collapse
|
10
|
Mapanga RF, Joseph D, Symington B, Garson KL, Kimar C, Kelly-Laubscher R, Essop M. Detrimental effects of acute hyperglycaemia on the rat heart. Acta Physiol (Oxf) 2014; 210:546-64. [PMID: 24286628 DOI: 10.1111/apha.12184] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2013] [Revised: 08/27/2013] [Accepted: 10/19/2013] [Indexed: 01/08/2023]
Abstract
AIM Hyperglycaemia is an important risk factor for acute myocardial infarction. It can lead to increased induction of non-oxidative glucose pathways (NOGPs) - polyol and hexosamine biosynthetic pathways, advanced glycation end products and protein kinase C - that may contribute to cardiovascular diseases onset. However, the precise underlying mechanisms remain poorly understood. Here we hypothesized that acute hyperglycaemia increases myocardial oxidative stress and NOGP activation resulting in cardiac dysfunction during ischaemia-reperfusion and that inhibition of, and/or shunting flux away from NOGPs [by benfotiamine (BFT) treatment], leads to cardioprotection. METHODS We employed several experimental systems: (i) Isolated rat hearts were perfused ex vivo with Krebs-Henseleit buffer containing 33 mm glucose vs. controls (11 mm glucose) ± global ischaemia and reperfusion ± BFT (first 20 min of reperfusion); (ii) Infarct size determination as per the ischaemic protocol, but with regional ischaemia and reperfusion ± BFT treatment; in separate experiments, NOGP inhibitors were also employed for (i) and (ii); and (iii) In vivo coronary ligations performed on streptozotocin-treated rats ± BFT treatment (early reperfusion). RESULTS Acute hyperglycaemia generated myocardial oxidative stress, NOGP activation and apoptosis, but caused no impairment of cardiac function during pre-ischaemia, thereby priming hearts for later damage. Following ischaemia-reperfusion (under hyperglycaemic conditions), such effects were exacerbated together with cardiac contractile dysfunction. Moreover, inhibition of respective NOGPs and shunting away by BFT treatment (in part) improved cardiac function during ischaemia-reperfusion. CONCLUSION Coordinate NOGP activation in response to acute hyperglycaemia results in contractile dysfunction during ischaemia-reperfusion, allowing for the development of novel cardioprotective agents.
Collapse
Affiliation(s)
- R. F. Mapanga
- Cardio-Metabolic Research Group (CMRG); Department of Physiological Sciences; Stellenbosch University; Stellenbosch South Africa
| | - D. Joseph
- Cardio-Metabolic Research Group (CMRG); Department of Physiological Sciences; Stellenbosch University; Stellenbosch South Africa
| | - B. Symington
- Cardio-Metabolic Research Group (CMRG); Department of Physiological Sciences; Stellenbosch University; Stellenbosch South Africa
| | - K.-L. Garson
- Cardio-Metabolic Research Group (CMRG); Department of Physiological Sciences; Stellenbosch University; Stellenbosch South Africa
| | - C. Kimar
- Cardio-Metabolic Research Group (CMRG); Department of Physiological Sciences; Stellenbosch University; Stellenbosch South Africa
| | - R. Kelly-Laubscher
- Department of Human Biology; Faculty of Health Sciences; University of Cape Town; Observatory South Africa
| | - M.Faadiel Essop
- Cardio-Metabolic Research Group (CMRG); Department of Physiological Sciences; Stellenbosch University; Stellenbosch South Africa
| |
Collapse
|
11
|
Curci C, Castellano G, Stasi A, Divella C, Loverre A, Gigante M, Simone S, Cariello M, Montinaro V, Lucarelli G, Ditonno P, Battaglia M, Crovace A, Staffieri F, Oortwijn B, van Amersfoort E, Gesualdo L, Grandaliano G. Endothelial-to-mesenchymal transition and renal fibrosis in ischaemia/reperfusion injury are mediated by complement anaphylatoxins and Akt pathway. Nephrol Dial Transplant 2014; 29:799-808. [PMID: 24463188 DOI: 10.1093/ndt/gft516] [Citation(s) in RCA: 143] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Increasing evidence demonstrates a phenotypic plasticity of endothelial cells (ECs). Endothelial-to-mesenchymal transition (EndMT) contributes to the development of tissue fibrosis. However, the pathogenic factors and signalling pathways regulating this process in ischaemia/reperfusion (I/R) injury are still poorly understood. METHODS We investigated the possible role of complement in the induction of this endothelial dysfunction in a swine model of renal I/R injury by using recombinant C1 inhibitor in vivo. RESULTS Here, we showed that I/R injury reduced the density of renal peritubular capillaries and induced tissue fibrosis with generation of CD31(+)/α-SMA(+) and CD31(+)/FPS-1(+) cells indicating EndMT. When we inhibited complement, the process of EndMT became rare, with preserved density of peritubular capillaries and significant reduction in renal fibrosis. When we activated ECs by anaphylatoxins in vitro, C3a and C5a led to altered endothelial phenotype with increased expression of fibroblast markers and decrease expression of specific endothelial markers. The activation of Akt pathway was pivotal for the C3a and C5a-induced EndMT in vitro. In accordance, inhibition of complement in vivo led to the abrogation of Akt signalling, with hampered EndMT and tissue fibrosis. CONCLUSIONS Our data demonstrate a critical role for complement in the acute induction of EndMT via the Akt pathway. Therapeutic inhibition of these systems may be essential to prevent vascular damage and tissue fibrosis in transplanted kidney.
Collapse
Affiliation(s)
- Claudia Curci
- Renal, Dialysis and Transplantation Unit, Department of Emergency and Organ Transplantation, University of Bari, Bari, Italy
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
12
|
Role of endothelial nitric oxide synthase and vagal activity in the endothelial protection of atorvastatin in ischemia/reperfusion injury. J Cardiovasc Pharmacol 2013; 61:391-400. [PMID: 23364605 DOI: 10.1097/fjc.0b013e318286baf3] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Vascular endothelial dysfunction plays a pivotal role in the development and maintenance of ischemia/reperfusion (I/R) injury. Statins, developed as lipid-lowering drugs, partially restore vagal activity and exhibit pleiotropic effects. This study was aimed at determining the effect of atorvastatin (ATV) on endothelial dysfunction in peripheral resistance arteries after I/R injury. After pretreatment with ATV (10 mg·kg·d) or its vehicle for 3 days, the superior mesenteric artery was occluded for 60 minutes and reperfusion for 90 minutes or the rats were anesthetized without being subjected to ischemia. In the ATV-treated I/R group, the increased contractions to KCl and 5-hydroxytryptamine induced by I/R were ameliorated, and attenuated endothelium-dependent relaxations to acetylcholine (ACh) were normalized. The restored relaxation to ACh was abolished by N-nitro-L-arginine methyl ester. ATV prevented the structural damage of vascular endothelial cells. Furthermore, the activities of phosphatidylinositol-3-kinase, Akt, and endothelial nitric oxide synthase were elevated in mesenteric arteries after ATV treatment. In addition, I/R-induced increment of endothelial cells apoptosis was also attenuated by ATV. Intriguingly, ATV also increased baroreflex sensitivity and serum ACh content after I/R. In conclusion, the endothelial protective effect of ATV in peripheral arteries is associated with the activated phosphatidylinositol-3-kinase/Akt/endothelial nitric oxide synthase pathway and restored vagal activity.
Collapse
|
13
|
Kandilis AN, Karidis NP, Kouraklis G, Patsouris E, Vasileiou I, Theocharis S. Proteasome inhibitors: possible novel therapeutic strategy for ischemia–reperfusion injury? Expert Opin Investig Drugs 2013; 23:67-80. [DOI: 10.1517/13543784.2013.840287] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Apostolos N Kandilis
- National and Kapodistrian University of Athens, Laikon General Hospital, Medical School, Second Department of Propedeutic Surgery,
Athens, Greece
- National and Kapodistrian University of Athens, Laikon General Hospital, Medical School, First Department of Pathology,
Athens, Greece
| | - Nikolaos P Karidis
- National and Kapodistrian University of Athens, Laikon General Hospital, Medical School, First Department of Pathology,
Athens, Greece
- Freeman Hospital NHS, Department of HPB and Transplant Surgery,
Newcastle upon Tyne, UK
| | - Gregory Kouraklis
- National and Kapodistrian University of Athens, Laikon General Hospital, Medical School, Second Department of Propedeutic Surgery,
Athens, Greece
| | - Efstratios Patsouris
- National and Kapodistrian University of Athens, Laikon General Hospital, Medical School, First Department of Pathology,
Athens, Greece
| | - Ioanna Vasileiou
- Laikon General Hospital, Department of Anesthesiology,
Athens, Greece
| | - Stamatios Theocharis
- National and Kapodistrian University of Athens, Medical School, First Department of Pathology,
75, Mikras Asias street, Goudi, Athens, GR11527, Greece ;
| |
Collapse
|
14
|
Guo W, Sun J, Jiang L, Duan L, Huo M, Chen N, Zhong W, Wassy L, Yang Z, Feng H. Imperatorin Attenuates LPS-Induced Inflammation by Suppressing NF-κB and MAPKs Activation in RAW 264.7 Macrophages. Inflammation 2012; 35:1764-72. [DOI: 10.1007/s10753-012-9495-9] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
|
15
|
David A, Van Langendonckt A, Gilliaux S, Dolmans MM, Donnez J, Amorim CA. Effect of cryopreservation and transplantation on the expression of kit ligand and anti-Mullerian hormone in human ovarian tissue. Hum Reprod 2012; 27:1088-95. [PMID: 22313872 DOI: 10.1093/humrep/des013] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND Although cryopreservation and transplantation of ovarian tissue represent a promising alternative to safeguard fertility in cancer patients, low recovery rates of oocytes aspirated from antral follicles and a significant number of empty follicles have been observed in women with transplanted frozen-thawed ovarian tissue. In order to understand how freezing and/or grafting may affect follicular development, the follicular expression of kit ligand (KL) and anti-Müllerian hormone (AMH), two key factors activating and inhibiting follicle growth, were assessed after long-term grafting in severe combined immunodeficient (SCID) mice. METHODS Ovarian biopsies from eight patients were used for fresh and frozen-thawed tissue xenografting in 13 SCID mice for a period of 28 weeks, including 2 weeks of gonadotrophin stimulation. KL, AMH and proliferating cell nuclear antigen (PCNA) immunostaining were quantified before and after grafting in the two treatment groups (fresh and frozen-thawed grafted ovarian tissue). RESULTS Lower expression of KL was found in primordial and primary follicles after grafting of both fresh and frozen-thawed tissue. Consistent expression of AMH was found in most growing follicles at a similar rate in both graft types. In fresh and frozen-thawed grafts, 13-14% of primordial follicles were PCNA-positive, indicating a similar maintenance of quiescent follicles despite follicle activation. CONCLUSIONS Grafting and/or gonadotrophin stimulation appear to affect the follicular expression of KL, which may alter oocyte quality. AMH expression in growing follicles after ovarian tissue transplantation may be one of the factors contributing to the preservation of resting follicles in 28-week-old grafts.
Collapse
Affiliation(s)
- Anu David
- Department of Gynecology, Institut de Recherche Expérimentale et Clinique, Université Catholique de Louvain, Avenue Emmanuel Mounier 52, 1200 Brussels, Belgium
| | | | | | | | | | | |
Collapse
|
16
|
Guo W, Shi X, Liu A, Yang G, Yu F, Zheng Q, Wang Z, Allen DG, Lu Z. RNA binding protein QKI inhibits the ischemia/reperfusion-induced apoptosis in neonatal cardiomyocytes. Cell Physiol Biochem 2011; 28:593-602. [PMID: 22178871 DOI: 10.1159/000335755] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/09/2011] [Indexed: 11/19/2022] Open
Abstract
BACKGROUNDS RNA-binding protein QKI is abundantly expressed in the brain and heart. The role of QKI in the nervous system has been well characterized, but its function in cardiac muscle is still poorly understood. The present study was to investigate the role of QKI in ischemia/reperfusion-induced apoptosis in cardiomyocytes. METHODS A simulated ischemia/reperfusion model was established in neonatal cardiomyocytes and adult rat heart. After QKI5 or QKI6 was expressed by adenovirus and QKI was knocked down QKI by RNAi in the cardiomyocytes, RT-PCR, western blot and immunofluorescence staining were applied to detect gene expression alterations. Apoptosis was evaluated by PARP degradation, DNA fragmentation (DNA laddering) and flow cytometry. RESULTS Our study demonstrated that both QKI5 and QKI6 were present in cardiomyocytes, while QKI5 expression was greatly inhibited by simulated ischemia/reperfusion. Knocking down endogenous QKI by RNAi enhanced cell susceptibility to apoptosis, whereas overexpression of either QKI5 or QKI6 suppressed IR-induced apoptosis substantially. The pro-apoptotic transcription factor FoxO1, a potential QKI target, was induced by ischemia/reperfusion at both total amount and nuclear distribution. Accordingly, FOXO1 downstream target genes were negatively affected by the presence of QKI with IR treatment. CONCLUSION In summary, our study supports that both QKI-5 and 6 are anti-apoptotic proteins in cardiomyocytes, favoring cardiac survival via antagonizing the elevation of some pro-apoptotic factors in cardiac injury.
Collapse
Affiliation(s)
- Wangang Guo
- Department of Biochemistry and Molecular Biology, the Fourth Military Medical University, 17 Changlexi Road, Xi'an, R. P. China
| | | | | | | | | | | | | | | | | |
Collapse
|
17
|
Chon H, Choi B, Jeong G, Lee E, Lee S. Suppression of proinflammatory cytokine production by specific metabolites of Lactobacillus plantarum 10hk2 via inhibiting NF-κB and p38 MAPK expressions. Comp Immunol Microbiol Infect Dis 2010; 33:e41-9. [DOI: 10.1016/j.cimid.2009.11.002] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2009] [Accepted: 11/01/2009] [Indexed: 12/29/2022]
|
18
|
Miura T, Ono K, Izumi T, Akuzawa R. Presence of lactoferrin in a bovine skim milk fraction with acid phosphatase activity. Int Dairy J 2010. [DOI: 10.1016/j.idairyj.2009.09.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
19
|
Abstract
Ischemia-reperfusion (I/R) injuries are implicated in a large array of pathological conditions such as myocardial infarction, cerebral stroke, and hepatic, renal, and intestinal ischemia, as well as following cardiovascular and transplant surgeries. The hallmark of these pathologies is excessive inflammation. Toll-like receptors (TLRs) are recognized as one of the main contributors to pathogen-induced inflammation and, more recently, injury-induced inflammation. Endogenous ligands such as low-molecular hyaluronic acid, fibronectin, heat shock protein 70, and heparin sulfate were all found to be cleaved in the inflamed tissue and to activate TLR2 and TLR4, initiating an inflammatory response even in the absence of pathogens and infiltrating immune cells. In this review, we discuss the contribution of TLR activation in hepatic, renal, cerebral, intestinal, and myocardial I/R injuries. A greater understanding of the role of TLRs in I/R injuries may aid in the development of specific TLR-targeted therapeutics to treat these conditions.
Collapse
|
20
|
King LA, Toledo AH, Rivera-Chavez FA, Toledo-Pereyra LH. Role of p38 and JNK in liver ischemia and reperfusion. ACTA ACUST UNITED AC 2009; 16:763-70. [PMID: 19680593 DOI: 10.1007/s00534-009-0155-x] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2009] [Accepted: 07/01/2009] [Indexed: 12/21/2022]
Abstract
BACKGROUND/PURPOSE The signal transduction of mitogen-activated protein kinases (MAPKs) has appeared to be an important mediator of ischemic-related events. Because of this, we analyzed the participation of p38 and JNK in liver ischemia and reperfusion, as two individual members of the MAPK family of proteins. METHODS All papers referred to in PubMed for the past 15 years were analyzed to determine how and when these MAPKs were considered to be an intricate part of the ischemic event. References were cross-studied to ascertain whether other papers could be found in the literature. RESULTS The role of p38 and JNK in liver ischemia was confirmed in the literature. The activation of these mediators was associated with the induction of apoptosis and necrosis. Inhibitors of p38 and JNK reduced the liver ischemia and reperfusion damage, probably through the mechanisms mentioned before. CONCLUSIONS The development of effective inhibitors of p38 and JNK protein mediators is important for minimizing the harmful effects associated with liver ischemia and reperfusion.
Collapse
Affiliation(s)
- LaShonda A King
- Department of Research, Kalamazoo Center for Medical Studies, Michigan State University, 1000 Oakland Drive, Kalamazoo, MI 49008, USA
| | | | | | | |
Collapse
|
21
|
Toledo-Pereyra LH, Lopez-Neblina F, Toledo AH. Protein Kinases in Organ Ischemia and Reperfusion. J INVEST SURG 2009; 21:215-26. [DOI: 10.1080/08941930802130149] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
22
|
Jin YC, Lee YS, Kim YM, Seo HG, Lee JH, Kim HJ, Yun-Choi HS, Chang KC. (S)-1-(α-Naphthylmethyl)-6,7-dihydroxy-1,2,3,4-tetrahydroisoquinoline (CKD712) Reduces Rat Myocardial Apoptosis against Ischemia and Reperfusion Injury by Activation of Phosphatidylinositol 3-Kinase/Akt Signaling and Anti-inflammatory Action in Vivo. J Pharmacol Exp Ther 2009; 330:440-8. [DOI: 10.1124/jpet.108.150342] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
|
23
|
The Protective Effect of Ischemic Preconditioning Associated With Altered Gene Expression Profiles in Intestinal Grafts After Reperfusion. J Surg Res 2009; 153:340-6. [DOI: 10.1016/j.jss.2008.06.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2008] [Revised: 05/22/2008] [Accepted: 06/03/2008] [Indexed: 10/21/2022]
|
24
|
Andersson R, Fan J, Xia J, Wang X. Liver ischaemia following vascular occlusion: a century's experience. Scand J Gastroenterol 2009; 43:1413-5. [PMID: 19031295 DOI: 10.1080/00365520802008157] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
|
25
|
Tyrosine phosphorylation of insulin receptor substrates during ischemia/reperfusion-induced apoptosis in rat liver. Langenbecks Arch Surg 2008; 394:123-31. [DOI: 10.1007/s00423-008-0394-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2008] [Accepted: 07/08/2008] [Indexed: 01/08/2023]
|
26
|
Mukai N, Nakanishi T, Shimizu A, Takubo T, Ikeda T. Identification of phosphotyrosyl proteins in vitreous humours of patients with vitreoretinal diseases by sodium dodecyl sulphate-polyacrylamide gel electrophoresis/Western blotting/matrix-assisted laser desorption time-of-flight mass spectrometry. Ann Clin Biochem 2008; 45:307-12. [PMID: 18482920 DOI: 10.1258/acb.2007.007151] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
BACKGROUND It is important to explain target proteins for the understanding of the pathogenesis of vitreoretinal diseases. In a previous study, we identified more than 100 proteins including seven angiogenic-modulated factors in vitreous humours (VHs). Although there have been many reports of expressed protein profiles in VHs, only a few of these are modified proteins, such as those undergoing phosphorylation and oxidation. METHODS We applied Western blotting (WB), selective staining of phosphoproteins and mass spectrometry to detect and identify phosphoproteins in VHs of patients with vitreoretinal diseases. After the removal of albumin and immunoglobulins A/G in VHs, the proteins were separated by sodium dodecyl sulphate-polyacrylamide gel electrophoresis and reacted with anti-PY-20 monoclonal antibody on transfer membranes, and treated proteins were visualized with Phos-tag and identified by matrix-assisted laser desorption time-of-flight mass spectrometry (MALDI-TOFMS). RESULTS WB analysis detected four positive bands, 20, 30, 35 and 55 kDa, in VHs of patients with vitreoretinal diseases. One of them, 55 kDa, was frequently detected in VHs of patients with macular hole (MH) and retinal detachment (RD), but the band was not found in patients with proliferative diabetic retinopathy (PDR). alpha-1 antitrypsin (alpha-1 AT) was identified in excised gel pieces of this band. CONCLUSIONS We identified five phosphorylated proteins such as alpha-1 AT in VHs of patients with vitreoretinal diseases by MALDI-TOFMS and WB analysis. Phosphotyrosyl alpha-1 AT was neither detected in PDR patients nor in any plasma. Phosphotyrosyl alpha-1 AT may be a new biomarker of MH and RD.
Collapse
Affiliation(s)
- Noriko Mukai
- Department of Ophthalmology, Osaka Medical College, 2-7 Daigaku-cho, Takatsuki-city, Osaka, Japan
| | | | | | | | | |
Collapse
|
27
|
Braithwaite SP, Xu J, Leung J, Urfer R, Nikolich K, Oksenberg D, Lombroso PJ, Shamloo M. Expression and function of striatal enriched protein tyrosine phosphatase is profoundly altered in cerebral ischemia. Eur J Neurosci 2008; 27:2444-52. [PMID: 18445231 DOI: 10.1111/j.1460-9568.2008.06209.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Striatal enriched protein tyrosine phosphatase (STEP) acts in the central nervous system to dephosphorylate a number of important proteins involved in synaptic function including ERK and NMDA receptor subunits. These proteins are also linked to stroke, in which cerebral ischemia triggers a complex cascade of events. Here we demonstrate that STEP is regulated at both the transcriptional and the post-transcriptional levels in rat models of cerebral ischemia and that its regulation may play a role in the outcome of ischemic insults. After transient middle cerebral artery occlusion, there are profound decreases in the levels of STEP mRNA, whilst in global ischemia STEP mRNA is selectively down-regulated in areas susceptible to ischemic damage. In a neuroprotective preconditioning paradigm, and in regions of the brain that are relatively resistant to ischemic damage, STEP mRNA levels are increased. Furthermore, there is a significant processing of STEP after ischemia to generate a novel species, STEP(33), resulting in a redistribution of STEP from membrane-bound to soluble compartments. Concomitant with the cleavage of mature forms of STEP, there are changes in the phosphorylation state of ERK. We show that the cleavage of STEP leads to a catalytically active form, but this cleaved form no longer binds to and dephosphorylates its substrate pERK. Therefore, in response to ischemic insults, there are profound reductions in both the amount and the activity of STEP, its localization, as well as the activity of one of its key substrates, pERK. These changes in STEP may reflect a critical role in the outcomes of ischemic brain injury.
Collapse
|
28
|
Wan J, Winn LM. In utero exposure to benzene increases embryonic c-Myb and Pim-1 protein levels in CD-1 mice. Toxicol Appl Pharmacol 2008; 228:326-33. [DOI: 10.1016/j.taap.2007.12.014] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2007] [Revised: 12/06/2007] [Accepted: 12/06/2007] [Indexed: 10/22/2022]
|
29
|
Kim Y, So HS, Youn MJ, Kim ES, Song MS, Chai KY, Woo WH, Cho KH, Moon BS, Park R. Anti-inflammatory effect of So-Pung-Tang, a Korean traditional prescription for cerebral infarction patients. JOURNAL OF ETHNOPHARMACOLOGY 2007; 114:425-431. [PMID: 17931810 DOI: 10.1016/j.jep.2007.08.041] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2007] [Revised: 07/18/2007] [Accepted: 08/16/2007] [Indexed: 05/25/2023]
Abstract
So-Pung-Tang (Sopung), a prescription composed of 14 herbal mixtures, has been widely used in the treatment of cerebral infarction in Oriental Medicine. However, the mechanisms by which the formula affects on the production of pro-inflammatory cytokines in cerebral infarction patients remain unknown yet. The levels of secretory protein of pro-inflammatory cytokines, including tumor necrosis factor (TNF)-alpha, interlukin (IL)-1beta, and IL-6, were significantly increased in both THP-1 differentiated macrophage-like cells (THP-1/M) and peripheral blood mononuclear cells (PBMCs) from cerebral infarction patients after stimulation. However, pretreatment with Sopung markedly inhibited the secretion of TNF-alpha and IL-6, but not IL-1beta, in lipopolysaccharide (LPS)-stimulated THP-1/M cells and PBMCs treated with LPS and phytohemagglutinin (PHA). Furthermore, Sopung significantly inhibited LPS-induced phosphorylation of extracellular signal-regulated kinase (ERK1/2) and c-jun N-terminal kinase (JNK), but not p38 in THP-1/M cells. These data indicate that Sopung may be beneficial in the cessation of inflammatory processes of cerebral infarction through suppression of ERK1/2 and JNK activation.
Collapse
Affiliation(s)
- Yunha Kim
- Vestibulocochlear System Research Center and Department of Microbiology, Wonkwang University School of Medicine, Iksan, Jeonbuk 570-749, Republic of Korea
| | | | | | | | | | | | | | | | | | | |
Collapse
|
30
|
McFadden DW, Souba WW. The Journal of Surgical Research: Impact Factor 2006. J Surg Res 2007. [DOI: 10.1016/j.jss.2007.07.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
31
|
Abstract
Injury due to ischemia and reperfusion (I/R) causes an inflammatory response due to oxidative damage, which triggers stress signaling processes that eventually result in cell apoptosis and death. There are a number of chemical mediators and pathways involved in the I/R response. Thus from a therapeutic point of view, it would be most efficient to focus on the most important active mediators of inflammation and apoptosis and manipulate these to improve cell function and survival. Over the last few years, the Akt pathway has become such a target due to its role as a signaling pathway where modulation of substrates prevents apoptosis. The involvement of Akt in the cell survival pathway is a complex process that requires an extensive machinery of intracellular events. The aim of this review is to organize these findings to better understand Akt's mechanism of protection and how it modulates specific substrates in the heart, liver, and brain affected by I/R. Akt functions as a survival kinase by phosphorylating a number of apoptosis-regulatory molecules such as BAD, forkhead transcription factors, caspase 9, and IkappaB kinase to influence NF-kappaB and GSK-3beta. Akt's broad scope places it at the center of multiple critical steps, allowing it to play a protective role in various organs affected by I/R injury. From a practical and clinical application point of view, the upregulation of Akt could potentially be used alone or in combination with other therapeutic strategies to treat I/R injury and thus to improve cell and organ function. The means by which Akt manipulation should occur is not well defined, and it is possible that pharmacologically, such as in the case of selectin inhibitors in our experience or through well-orchestrated gene therapy, this important molecule can be better upregulated and therefore can offer effective protection. The short- and long-term effects with Akt upregulation have not been well studied so far. Early concerns about cancer or cardiac damage potential are inconclusive. Thus, more experiments are required in this particular area of research.
Collapse
Affiliation(s)
- Carolyn J Mullonkal
- Michigan State University, College of Human Medicine, Department of Research, Kalamazoo Center for Medical Studies, Kalamazoo, Michigan, USA
| | | |
Collapse
|
32
|
Sunil VR, Laumbach RJ, Patel KJ, Turpin BJ, Lim HJ, Kipen HM, Laskin JD, Laskin DL. Pulmonary effects of inhaled limonene ozone reaction products in elderly rats. Toxicol Appl Pharmacol 2007; 222:211-20. [PMID: 17610924 PMCID: PMC2772190 DOI: 10.1016/j.taap.2007.05.003] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2007] [Revised: 05/03/2007] [Accepted: 05/04/2007] [Indexed: 10/23/2022]
Abstract
d-Limonene is an unsaturated volatile organic chemical found in cleaning products, air fresheners and soaps. It is oxidized by ozone to secondary organic aerosols consisting of aldehydes, acids, oxidants and fine and ultra fine particles. The lung irritant effects of these limonene ozone reaction products (LOP) were investigated. Female F344 rats (2- and 18-month-old) were exposed for 3 h to air or LOP formed by reacting 6 ppm d-limonene and 0.8 ppm ozone. BAL fluid, lung tissue and cells were analyzed 0 h and 20 h later. Inhalation of LOP increased TNF-alpha, cyclooxygenase-2, and superoxide dismutase in alveolar macrophages (AM) and Type II cells. Responses of older animals were attenuated when compared to younger animals. LOP also decreased p38 MAP kinase in AM from both younger and older animals. In contrast, while LOP increased p44/42 MAP kinase in AM from younger rats, expression decreased in AM and Type II cells from older animals. NF-kappaB and C/EBP activity also increased in AM from younger animals following LOP exposure but decreased or was unaffected in Type II cells. Whereas in younger animals LOP caused endothelial cell hypertrophy, perivascular and pleural edema and thickening of alveolar septal walls, in lungs from older animals, patchy accumulation of fluid within septal walls in alveolar sacs and subtle pleural edema were noted. LOP are pulmonary irritants inducing distinct inflammatory responses in younger and older animals. This may contribute to the differential sensitivity of these populations to pulmonary irritants.
Collapse
Affiliation(s)
- Vasanthi R Sunil
- Department of Pharmacology and Toxicology, Rutgers University, Piscataway, NJ 08854, USA.
| | | | | | | | | | | | | | | |
Collapse
|
33
|
Guo G, Bhat NR. p38alpha MAP kinase mediates hypoxia-induced motor neuron cell death: a potential target of minocycline's neuroprotective action. Neurochem Res 2007; 32:2160-6. [PMID: 17594516 DOI: 10.1007/s11064-007-9408-8] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2007] [Accepted: 06/06/2007] [Indexed: 01/25/2023]
Abstract
Hypoxia-ischemia (HI) may play a significant role in motor neuron death associated with the pathology of spinal cord injury and, perhaps, amyotrophic lateral sclerosis. The present study employs an in vitro model of HI to investigate the role of a stress kinase pathway, i.e., p38 MAP kinase, in cell death signaling in a motor neuron cell line, i.e., NSC34, subjected to oxygen-glucose deprivation (OGD). Although the neurons were essentially tolerant to either hypoxia (0.2% O(2)) or low glucose (1 mM) alone, more than 60% of them died in response to combined low oxygen and low-glucose exposure. Minocycline, a semi-synthetic tetracycline known for its neuroprotective effects in models of neurodegeneration, afforded substantial (approximately 50%) protection against hypoxic cell death, assessed by lactate dehydrogenase release and flow cytometry, while suppressing OGD-induced p38 MAP kinase activation. An inhibitor of p38 kinase, SB203580, as well as siRNA-mediated down-regulation of p38 kinase elicited an almost complete blockade of OGD-induced cell death. The use of p38 isoform-specific siRNAs further revealed preferential involvement of the alpha over the beta isoform of p38 MAP kinase in hypoxic neuronal cell death in our model.
Collapse
Affiliation(s)
- Guiwen Guo
- Department of Neurosciences, Medical University of South Carolina, Charleston, SC 29425, USA
| | | |
Collapse
|
34
|
Cursio R, Miele C, Filippa N, Van Obberghen E, Gugenheim J. Alterations in protein tyrosine kinase pathways in rat liver following normothermic ischemia-reperfusion. Transplant Proc 2007; 38:3362-5. [PMID: 17175272 DOI: 10.1016/j.transproceed.2006.10.165] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2006] [Indexed: 10/23/2022]
Abstract
The phosphoregulation of signal transduction pathways is a complex series of reactions that modulate the cellular response to ischemia-reperfusion (I-R). The aim of this study was to evaluate the effect of normothermic liver I-R on protein tyrosine phosphorylation, production of angiogenic growth factors, and activation of signal proteins in tyrosine kinase pathways. A segmental normothermic ischemia of the liver was induced in rats by occluding the blood vessels (including the bile duct) to the median and left lateral lobes for 120 minutes. Liver extracts from either ischemic or nonischemic lobes were prepared at 0, 1, 3, and 6 hours after reperfusion. Liver tyrosine phosphorylation of proteins was examined by Western blot analysis, whereas vascular endothelial growth factor (VEGF) mRNA was analyzed by Northern blot. In ischemic liver lobes, VEGF mRNA and total protein levels increased at 1 and 3 hours after reperfusion. Tyrosine phosphorylation of the VEGF receptor Flk-1 and the platelet-derived growth factor receptor (PDGF-R) was increased only at 1 hour after reperfusion, while c-Src tyrosine phosphorylation remained increased at 3 hours and remained up to 6 hours after reperfusion. In conclusion, 1-R led to alterations in protein tyrosine phosphorylation and increased expression of VEGF in rat liver.
Collapse
Affiliation(s)
- R Cursio
- Laboratoire de Recherches Chirurgicales, IFR 50, Faculté de Médecine, Université de Nice Sophia Antipolis, Nice, France.
| | | | | | | | | |
Collapse
|
35
|
Abstract
It is becoming more evident that not only can drugs and environmental chemicals interfere with normal fetal development by causing structural malformations, such as limb defects, but that xenobiotic exposure during development can also cause biochemical and functional abnormalities that may ultimately lead to cancer later on in life. Fetal toxicity may be partly mediated by the embryonic bioactivation of xenobiotics to free radical intermediates that can lead to oxidative stress and potentially lead, in some cases, to carcinogenesis. Using a number of examples, this review will focus on the role of reactive oxygen species (ROS) in the mechanisms pertaining to in utero initiated cancers.
Collapse
Affiliation(s)
- Joanne Wan
- Department of Pharmacology and Toxicology, School of Environmental Studies, Queen's University, Kingston, Ontario, Canada
| | | |
Collapse
|