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Neuroprotective Effect of Piclamilast-Induced Post-Ischemia Pharmacological Treatment in Mice. Neurochem Res 2022; 47:2230-2243. [PMID: 35482135 DOI: 10.1007/s11064-022-03609-w] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Revised: 04/13/2022] [Accepted: 04/13/2022] [Indexed: 01/10/2023]
Abstract
Various studies have evidenced the neuroprotective role of PDE4 inhibitors. However, whether PDE4 inhibitor, Piclamilast pharmacological post-treatment is protective during cerebral ischemia reperfusion-induced injury remains unknown. Therefore, this study design included testing the hypothesis that Piclamilast administered at the beginning of a reperfusion phase (Piclamilast pPost-trt) shows protective effects and explores & probes underlying downstream mechanisms. Swiss albino male mice were subjected to global ischemic and reperfusion injury for 17 min. The animals examined cerebral infarct size, biochemical parameters, inflammatory mediators, and motor coordination. For memory, assessment mice were subjected to morris water maze (MWM) and elevated plus maze (EPM) test. Histological changes were assessed using HE staining. Piclamilast pPost-trt significantly reduced I/R injury-induced deleterious effects on biochemical parameters of oxidative stress, inflammatory parameters, infarct size, and histopathological changes, according to the findings. These neuroprotective effects of pPost-trt are significantly abolished by pre-treatment with selective CREB inhibitor, 666-15. Current study concluded that induced neuroprotective benefits of Piclamilast Post-trt, in all probability, maybe mediated through CREB activation. Hence, its neuroprotective effects can be further explored in clinical settings.
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Khan H, Kashyap A, Kaur A, Singh TG. Pharmacological postconditioning: a molecular aspect in ischemic injury. J Pharm Pharmacol 2020; 72:1513-1527. [PMID: 33460133 DOI: 10.1111/jphp.13336] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Accepted: 06/21/2020] [Indexed: 12/12/2022]
Abstract
OBJECTIVE Ischaemia/reperfusion (I/R) injury is defined as the damage to the tissue which is caused when blood supply returns to tissue after ischaemia. To protect the ischaemic tissue from irreversible injury, various protective agents have been studied but the benefits have not been clinically applicable due to monotargeting, low potency, late delivery or poor tolerability. KEY FINDINGS Strategies involving preconditioning or postconditioning can address the issues related to the failure of protective therapies. In principle, postconditioning (PoCo) is clinically more applicable in the conditions in which there is unannounced ischaemic event. Moreover, PoCo is an attractive beneficial strategy as it can be induced rapidly at the onset of reperfusion via series of brief I/R cycles following a major ischaemic event or it can be induced in a delayed manner. Various pharmacological postconditioning (pPoCo) mechanisms have been investigated systematically. Using different animal models, most of the studies on pPoCo have been carried out preclinically. SUMMARY However, there is a need for the optimization of the clinical protocols to quicken pPoCo clinical translation for future studies. This review summarizes the involvement of various receptors and signalling pathways in the protective mechanisms of pPoCo.
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Affiliation(s)
- Heena Khan
- Chitkara College of Pharmacy, Chitkara University, Punjab, India
| | - Ankita Kashyap
- Chitkara College of Pharmacy, Chitkara University, Punjab, India
| | - Amarjot Kaur
- Chitkara College of Pharmacy, Chitkara University, Punjab, India
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Jin Y, Liu Q, Zhou C, Hu X, Wang L, Han S, Zhou Y, Liu Y. Intestinal oligopeptide transporter PepT1-targeted polymeric micelles for further enhancing the oral absorption of water-insoluble agents. NANOSCALE 2019; 11:21433-21448. [PMID: 31681915 DOI: 10.1039/c9nr07029j] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The intestinal epithelium is the main barrier for nanocarriers to orally deliver poorly water-soluble and absorbed agents. To further improve the transmembrane transport efficiency of polymeric micelles, intestinal oligopeptide transporter PepT1-targeted polymeric micelles were fabricated by Gly-Sar-conjugated poly(ethylene glycol)-poly(d,l-lactic acid). The functionalized polymeric micelles with about 40 nm diameter, uniform spherical morphology and favorable cytocompatibility with Caco-2 cells were demonstrated to distinctly enhance the cellular uptake and transmembrane transport of the loaded agents. The results of intestinal absorption strongly evidenced the higher accumulation of the micelles inside the epithelial cells, at the apical and basolateral sides of the epithelium within the villi in mice. Furthermore, the interaction of Gly-Sar decorated polymeric micelles with PepT1 was explored to promote the internalization of the micelles through fluorescence immunoassay, and the PepT1 level on the membrane of Caco-2 cells treated with the micelles appeared to change in a distinctly time-dependent manner. Both clathrin- and caveolae-mediated pathways were involved in the transcellular transport for undecorated polymeric micelles, while the transcellular transport pathway for Gly-Sar decorated ones was changed to be mainly mediated by clathrin and lipid rafts. The colocalization of Gly-Sar decorated micelles with the organelles observed by confocal laser scanning microscopy indicated that late endosomes, lysosomes, endoplasmic reticulum and Golgi apparatus appeared to participate in the intracellular trafficking progression of the micelles. These results suggested that PepT1-targeted polymeric micelles might have a strong potential to greatly promote the oral absorption of poorly water-soluble and absorbed agents.
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Affiliation(s)
- Yao Jin
- Beijing Key Laboratory of Molecular Pharmaceutics and New Drug Delivery Systems, School of Pharmaceutical Sciences, Peking University, Beijing 100191, China.
| | - Qi Liu
- Beijing Key Laboratory of Molecular Pharmaceutics and New Drug Delivery Systems, School of Pharmaceutical Sciences, Peking University, Beijing 100191, China.
| | - Chuhang Zhou
- Beijing Key Laboratory of Molecular Pharmaceutics and New Drug Delivery Systems, School of Pharmaceutical Sciences, Peking University, Beijing 100191, China.
| | - Xinping Hu
- Beijing Key Laboratory of Molecular Pharmaceutics and New Drug Delivery Systems, School of Pharmaceutical Sciences, Peking University, Beijing 100191, China.
| | - Leqi Wang
- Beijing Key Laboratory of Molecular Pharmaceutics and New Drug Delivery Systems, School of Pharmaceutical Sciences, Peking University, Beijing 100191, China.
| | - Shidi Han
- Beijing Key Laboratory of Molecular Pharmaceutics and New Drug Delivery Systems, School of Pharmaceutical Sciences, Peking University, Beijing 100191, China.
| | - Yuanhang Zhou
- Beijing Key Laboratory of Molecular Pharmaceutics and New Drug Delivery Systems, School of Pharmaceutical Sciences, Peking University, Beijing 100191, China.
| | - Yan Liu
- Beijing Key Laboratory of Molecular Pharmaceutics and New Drug Delivery Systems, School of Pharmaceutical Sciences, Peking University, Beijing 100191, China.
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Karwad MA, Couch DG, Wright KL, Tufarelli C, Larvin M, Lund J, O'Sullivan SE. Endocannabinoids and endocannabinoid-like compounds modulate hypoxia-induced permeability in CaCo-2 cells via CB 1, TRPV1, and PPARα. Biochem Pharmacol 2019; 168:465-472. [PMID: 31325449 DOI: 10.1016/j.bcp.2019.07.017] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Accepted: 07/15/2019] [Indexed: 01/10/2023]
Abstract
BACKGROUND AND PURPOSE We have previously reported that endocannabinoids modulate permeability in Caco-2 cells under inflammatory conditions and hypothesised in the present study that endocannabinoids could also modulate permeability in ischemia/reperfusion. EXPERIMENTAL APPROACH Caco-2 cells were grown on cell culture inserts to confluence. Trans-epithelial electrical resistance (TEER) was used to measure permeability. To generate hypoxia (0% O2), a GasPak™ EZ anaerobe pouch system was used. Endocannabinoids were applied to the apical or basolateral membrane in the presence or absence of receptor antagonists. KEY RESULTS Complete hypoxia decreased TEER (increased permeability) by ~35% after 4 h (recoverable) and ~50% after 6 h (non-recoverable). When applied either pre- or post-hypoxia, apical application of N-arachidonoyl-dopamine (NADA, via TRPV1), oleamide (OA, via TRPV1) and oleoylethanolamine (OEA, via TRPV1) inhibited the increase in permeability. Apical administration of anandamide (AEA) and 2-arachidonoylglycerol (2-AG) worsened the permeability effect of hypoxia (both via CB1). Basolateral application of NADA (via TRPV1), OA (via CB1 and TRPV1), noladin ether (NE, via PPARα), and palmitoylethanolamine (PEA, via PPARα) restored permeability after 4 h hypoxia, whereas OEA increased permeability (via PPARα). After 6 h hypoxia, where permeability does not recover, only basolateral application PEA sustainably decreased permeability, and NE decreased permeability. CONCLUSIONS AND IMPLICATIONS A variety of endocannabinoids and endocannabinoid-like compounds modulate Caco-2 permeability in hypoxia/reoxygenation, which involves multiple targets, depending on whether the compounds are applied to the basolateral or apical membrane. CB1 antagonism and TRPV1 or PPARα agonism may represent novel therapeutic targets against several intestinal disorders associated with increased permeability.
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Affiliation(s)
- M A Karwad
- Division of Medical Sciences & Graduate Entry Medicine, School of Medicine, Royal Derby Hospital, University of Nottingham, Nottingham, UK
| | - D G Couch
- Division of Medical Sciences & Graduate Entry Medicine, School of Medicine, Royal Derby Hospital, University of Nottingham, Nottingham, UK
| | - K L Wright
- Division of Biomedical & Life Sciences, Faculty of Health & Medicine, Lancaster University, Lancaster, UK
| | - C Tufarelli
- Leicester Cancer Research Centre, Department of Genetics and Genome Biology, University of Leicester, Leicester, UK
| | - M Larvin
- Graduate Entry Medical School and Health Research Institute, University of Limerick, Limerick, Ireland
| | - J Lund
- Division of Medical Sciences & Graduate Entry Medicine, School of Medicine, Royal Derby Hospital, University of Nottingham, Nottingham, UK
| | - S E O'Sullivan
- Division of Medical Sciences & Graduate Entry Medicine, School of Medicine, Royal Derby Hospital, University of Nottingham, Nottingham, UK.
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Grewal AK, Singh N, Singh TG. Effects of resveratrol postconditioning on cerebral ischemia in mice: role of the sirtuin-1 pathway. Can J Physiol Pharmacol 2019; 97:1094-1101. [PMID: 31340128 DOI: 10.1139/cjpp-2019-0188] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Evidence has demonstrated that resveratrol preconditioning exhibits neuroprotection against cerebral ischemia-reperfusion (IR) injury. The current investigation aimed to explore whether pharmacological postconditioning, by administering resveratrol, after a sustained ischemia and prior to prolonged reperfusion abrogates cerebral IR injury. Cerebral IR-induced injury mice model was employed in this study to evaluate the neuroprotective effects of pharmacological postconditioning with resveratrol (30 mg/kg; i.p.) administered 5 min before reperfusion. We administered sirtinol, a SIRT1/2 selective inhibitor (10 mg/kg; i.p.) 10 min before ischemia (17 min) and reperfusion (24 h), to elucidate whether the neuroprotection with resveratrol postconditioning depends on SIRT1 activation. Various biochemical and behavioural parameters and histopathological changes were assessed to examine the effect of pharmacological postconditioning. Infarct size is estimated using TTC staining. It was established that resveratrol postconditioning abrogated the deleterious effects of IR injury expressed with regard to biochemical parameters of oxidative stress (TBARS, SOD, GSH), acetylcholinesterase activity, behavioural parameters (memory, motor coordination), infarct size, and histopathological changes. Sirtinol significantly reversed the effect of resveratrol postconditioning. We conclude that induced neuroprotective benefits of resveratrol postconditioning may be the consequence of SIRT1 activation and resveratrol can be considered, for further studies, as potential agent inducing pharmacological postconditioning in clinical situations.
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Affiliation(s)
| | - Nirmal Singh
- Department of Pharmaceutical Sciences and Drug Research, Punjabi University, Patiala 147002, Punjab, India
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Weng L, Zhang F, Wang R, Ma W, Song Y. A review on protective role of genistein against oxidative stress in diabetes and related complications. Chem Biol Interact 2019; 310:108665. [PMID: 31125535 DOI: 10.1016/j.cbi.2019.05.031] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2019] [Revised: 05/14/2019] [Accepted: 05/20/2019] [Indexed: 12/17/2022]
Abstract
Diabetes mellitus (DM) is metabolism related problems that share the phenotype of hyperglycemia, which is triggered by a complicated interaction of hereditary and environmental elements. It is the main reason for end-stage renal disease (ESRD), amputations of the traumatic lower extremity, and grown-up visual impairment. It additionally inclines to neurodegenerative and cardiovascular sicknesses. With an expanding rate around the world, DM may be the main motive of morbidity and mortality within the foreseeable future. The objective of treatment for DM is to inhibit mortality and difficulties through normalizing blood glucose stage. Genistein, a naturally available soy isoflavone, is accounted for to have various medical advantages credited to numerous natural capacities. In the course of recent years, various examinations have shown that genistein has hostile to diabetic impacts, specifically, direct consequences for β-cell expansion, glucose-triggered insulin discharge, and safety towards apoptosis, unbiased of its functions as an estrogen receptor agonist, cancer prevention agent, or tyrosine kinase inhibitor. The present evaluation emphases on the promising molecular and biochemical paths associated with DM complications and, specifically, the multi-target method of genistein in diminishing diabetic neuropathy, nephropathy, and retinopathy.
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Affiliation(s)
- Lihong Weng
- Department of Pharmacy, The First Hospital of Jilin University, Changchun, Jilin, 130021, PR China
| | - Fengying Zhang
- Department of Pharmacy, The First Hospital of Jilin University, Changchun, Jilin, 130021, PR China
| | - Rui Wang
- Department of Pharmacy, The First Hospital of Jilin University, Changchun, Jilin, 130021, PR China
| | - Wei Ma
- Department of Pharmacy, The First Hospital of Jilin University, Changchun, Jilin, 130021, PR China
| | - Yingshi Song
- Department of Pharmacy, The First Hospital of Jilin University, Changchun, Jilin, 130021, PR China.
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Javdan N, Ayatollahi SA, Choudhary MI, Al-Hasani S, Kobarfard F, Mokhtarian K, Khoshmirsafa M, Ata A. Tsc1/Tsc2 complex: A molecular target of capsaicin for protection against testicular torsion induced injury in rats. CHINESE HERBAL MEDICINES 2019. [DOI: 10.1016/j.chmed.2019.03.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
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Grewal AK, Singh N, Singh TG. Neuroprotective effect of pharmacological postconditioning on cerebral ischaemia-reperfusion-induced injury in mice. ACTA ACUST UNITED AC 2019; 71:956-970. [PMID: 30809806 DOI: 10.1111/jphp.13073] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Accepted: 01/01/2019] [Indexed: 12/31/2022]
Abstract
OBJECTIVES To investigate the mechanism of neuroprotection rendered via pharmacological postconditioning in cerebral ischaemia-reperfusion-induced injury in mice. METHODS Pharmacological postconditioning is strategy which either involves hindering deleterious pathway or inducing modest stress level which triggers intracellular defence pathway to sustain more vigorous insult leading to conditioning. Hence, in current research we explored the potentiality of CGS21680 (0.5 mg/kg; i.p), an adenosine A2 A receptor agonist and PTEN inhibitor, SF1670 (3 mg/kg; i.p.) to trigger postconditioning after inducing cerebral global ischaemia (17 min) and reperfusion (24 h)-induced injury via occlusion of both carotid arteries. Mice were also given treatment with LY294002 (1.5 mg/kg; i.p.), a PI3K inhibitor and adenosine A2 A receptor antagonist, Istradefylline (2 mg/kg; i.p.), to establish the precise mechanism of postconditioning. Various biochemical and behavioural parameters were assessed to examine the effect of pharmacological postconditioning. KEY FINDINGS Pharmacological postconditioning induced with CGS21680 and SF1670 attenuated the infarction along with improved behavioural and biochemical parameters in comparison with ischaemia-reperfusion control group. The outcome of postconditioning with CGS21680 and SF1670 was significantly reversed by LY294002 and Istradefylline, respectively. CONCLUSIONS The neuroprotective effects of CGS21680 and SF1670 postconditioning on cerebral ischaemia-reperfusion injury may be due to PI3K/Akt pathway activation.
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Affiliation(s)
- Amarjot Kaur Grewal
- Department of Pharmacology, Chitkara college of Pharmacy, Chitkara University, Patiala, India
| | - Nirmal Singh
- Department of Pharmaceutical Sciences and Drug Research, Punjabi University, Patiala, India
| | - Thakur Gurjeet Singh
- Department of Pharmacology, Chitkara college of Pharmacy, Chitkara University, Patiala, India
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Javdan N, Ayatollahi SA, Choudhary MI, Al-Hasani S, Kobarfard F, Athar A, Pazoki-Toroudi H. Capsaicin protects against testicular torsion injury through mTOR-dependent mechanism. Theriogenology 2018; 113:247-252. [PMID: 29573663 DOI: 10.1016/j.theriogenology.2018.03.012] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2017] [Revised: 03/10/2018] [Accepted: 03/11/2018] [Indexed: 01/07/2023]
Abstract
SCOPE Testicular torsion and subsequent release of reactive oxygen species (ROS) can cause infertility in adults. Oxidative stress following testicular torsion plays an important role in the ýonset and development of apoptotic cell death through dysregulation of the cellular signaling pathways. Anti-inflammatory and antioxidant properties of capsaicin, a bioactive composition present in red peppers, has already been exploited for treatment of the cancer and pain relief. In present work, we evaluated the role of the mammalian target of rapamycin (mTOR) in antioxidant effect of capsaicin against reperfusion injury following testicular torsion. METHODS Male Wistar rats weighing 200-220 g were randomly assigned into four major groups: (i) a sham operated group, (ii) a testicular torsion (TT) group, (iii) three groups treated with different doses of capsaicin (TT + 100, 500 and 1000 μg/ml Cap), and (iv) three groups of healthy rats treated with different doses of capsaicin (100, 500 and 1000 μg/ml). Western blotting assay was used to examine the anti-apoptotic effects of capsaicin in testicular cells following torsion. H&E and TUNEL methods were used to evaluate testicular morphology and apoptosis activity. RESULTS Compared to control group, phosphorylation of mTOR was significantly increased in the TT groups. Capsaicin administration remarkably decreased the phosphorylation of mTOR at the highest dose (P < 0.05). Capsaicin decreased apoptosis and preserved tubular morphology in testes. CONCLUSION Our results showed that antioxidant properties of capsaicin minimizes cell death and reperfusion injury following testicular torsion.
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Affiliation(s)
- Nasim Javdan
- ShahidBeheshti University of Medical Sciences, Phytochemistry Research Center, Tehran, Iran
| | - Seyed Abdulmajid Ayatollahi
- ShahidBeheshti University of Medical Sciences, Phytochemistry Research Center, Tehran, Iran; Department of Chemistry, Richardson College for the Environmental Science Complex, The University of Winnipeg, 599 Portage Avenue, Winnipeg, MB, R3B 2G3, Canada; School of Pharmacy, ShahidBeheshti University of Medical Sciences, Tehran, Iran.
| | - Muhammad Iqbal Choudhary
- International Center for Chemical and Biological Sciences, H.E.J. Research Institute of Chemistry, University of Karachi, Karachi, Pakistan
| | - Safaa Al-Hasani
- Reproductive Medicine Unit, University of Schleswig-Holstein, Luebeck, Germany
| | - Farzad Kobarfard
- Department of Medicinal Chemistry, Shaheed Beheshti School of Pharmacy, Tehran, Iran
| | - Ata Athar
- Department of Chemistry, Richardson College for the Environmental Science Complex, The University of Winnipeg, 599 Portage Avenue, Winnipeg, MB, R3B 2G3, Canada
| | - Hamidreza Pazoki-Toroudi
- Physiology Research Center and Department of Physiology, Faculty of Medicine, Iran University of Medical Sciences, Tehran, Iran.
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Javdan N, Ayatollahi SA, Iqbal Choudhary M, Al-Hasani S, Pazoki-Toroudi H. FOXO1 targeting by capsaicin reduces tissue damage after testicular torsion. Andrologia 2018; 50:e12987. [PMID: 29411905 DOI: 10.1111/and.12987] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/10/2018] [Indexed: 12/28/2022] Open
Abstract
Testicular torsion-related oxidative stress causes a sequential chain of DNA damage, lipid peroxidation and cell death that leads to the derangement in the sperm functions and infertility. Capsaicin that has been applied for pain relief and cancer prevention possesses antioxidant properties which can be exploited to confer cell survival under ischaemic testis damage. Wistar male rats weighing 150-200 g were randomly divided into four groups: (i) sham group (all procedures except torsion of testis), (ii) ischaemia group (TT group), (iii) three TT groups treated with different dose of capsaicin (TT + different doses of Cap) and (iv) three control groups treated with different doses of capsaicin (100, 500 and 1000 ug/ml). Capsaicin administration significantly decreased the expression of pro-apoptotic factors and increased the expression of anti-apoptotic factors. Likewise, the expression of FOXO1 is significantly increased by higher doses of the capsaicin. Histological assessment by H&E and TUNEL method also exhibited an improved testicular morphology and decreased apoptosis in testes. These results suggested clinical potential for capsaicin in treatment of testicular torsion by targeting FOXO1 and apoptotic pathways.
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Affiliation(s)
- N Javdan
- Phytochemistry Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - S A Ayatollahi
- Phytochemistry Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
- School of Pharmacy, Department of Pharmacognosy, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - M Iqbal Choudhary
- International Center for Chemical and Biological Sciences, H.E.J. Research Institute of Chemistry, University of Karachi, Karachi, Pakistan
| | - S Al-Hasani
- Reproductive Medicine Unit, University of Schleswig-Holstein, Luebeck, Germany
| | - H Pazoki-Toroudi
- Physiology Research Center and Department of Physiology, Faculty of Medicine, Iran University of Medical Sciences, Tehran, Iran
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Gao L, Zhao H, Zhu T, Liu Y, Hu L, Liu Z, Huang H, Chen F, Deng Z, Chu D, Du D. The Regulatory Effects of Lateral Hypothalamus Area GABA B Receptor on Gastric Ischemia-Reperfusion Injury in Rats. Front Physiol 2017; 8:722. [PMID: 28983255 PMCID: PMC5613147 DOI: 10.3389/fphys.2017.00722] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2017] [Accepted: 09/06/2017] [Indexed: 12/16/2022] Open
Abstract
HIGHLIGHTSThe aim of the research was to determine the functional effects and molecular mechanisms of GABAB receptor on ischemia reperfusion-induced gastric injury in rats. The lateral hypothalamus area GABAB receptor attenuated the ischemia reperfusion-induced gastric injury by up-regulating the production of GABA, GABABR, and down-regulating P-GABABR in the brain. This work would provide a new therapeutic strategy for acute gastric injury.
Gastric ischemia-reperfusion (GI-R) injury progression is largely associated with excessive activation of the greater splanchnic nerve (GSN). This study aims to investigate the protective effects of GABAB receptor (GABABR) in the lateral hypothalamic area (LHA) on GI-R injury. A model of GI-R injury was established by clamping the celiac artery for 30 min and then reperfusion for 1 h. The coordinate of FN and LHA was identified in Stereotaxic Coordinates and then the L-Glu was microinjected into FN, GABAB receptor agonist baclofen, or GABAB receptor antagonist CGP35348 was microinjected into the LHA, finally the GI-R model was prepared. The expression of GABABR, P-GABABR, NOX2, NOX4, and SOD in the LHA was detected by western blot, PCR, and RT-PCR. The expression of IL-1β, NOX2, and NXO4 in gastric mucosa was detected by western blot. We found that microinjection of L-Glu into the FN or GABAB receptor agonist (baclofen) into the LHA attenuated GI-R injury. Pretreatment with GABAB receptor antagonist CGP35348 reversed the protective effects of FN stimulation or baclofen into the LHA. Microinjection of baclofen into the LHA obviously reduced the expression of inflammatory factor IL-1β, NOX2, and NOX4 in the gastric mucosa. Conclusion: The protective effects of microinjection of GABABR agonist into LHA on GI-R injury in rats could be mediated by up-regulating the production of GABA, GABABR, and down-regulating P-GABABR in the LHA.
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Affiliation(s)
- Lin Gao
- Neurology Center, The First Affiliated Hospital of Zhengzhou UniversityZhengzhou, China
| | - Huiru Zhao
- Shanghai Key Laboratory of Bio-Crops, College of Life Science, Shanghai UniversityShanghai, China
| | - Tao Zhu
- Department of Life Science, Heze UniversityHeze, China
| | - Yeliu Liu
- Department of General Surgery, Huai'an First People's Hospital, Nanjing Medical UniversityHuai'an, China
| | - Li Hu
- Shanghai Key Laboratory of Bio-Crops, College of Life Science, Shanghai UniversityShanghai, China
| | - Zhenguo Liu
- Shanghai Key Laboratory of Bio-Crops, College of Life Science, Shanghai UniversityShanghai, China
| | - Hai Huang
- Shanghai Key Laboratory of Bio-Crops, College of Life Science, Shanghai UniversityShanghai, China
| | - Fuxue Chen
- Shanghai Key Laboratory of Bio-Crops, College of Life Science, Shanghai UniversityShanghai, China
| | - Zhenxu Deng
- Department of Life Science, Heze UniversityHeze, China
| | - Dechang Chu
- Department of Life Science, Heze UniversityHeze, China
| | - Dongshu Du
- Neurology Center, The First Affiliated Hospital of Zhengzhou UniversityZhengzhou, China.,Shanghai Key Laboratory of Bio-Crops, College of Life Science, Shanghai UniversityShanghai, China
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Hu Y, Tao X, Han X, Xu L, Yin L, Qi Y, Zhao Y, Xu Y, Wang C, Peng J. Dioscin attenuates gastric ischemia/reperfusion injury through the down-regulation of PKC/ERK1/2 signaling via PKCα and PKCβ2 inhibition. Chem Biol Interact 2016; 258:234-44. [DOI: 10.1016/j.cbi.2016.09.014] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2016] [Revised: 08/18/2016] [Accepted: 09/16/2016] [Indexed: 02/07/2023]
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Preconditioning is hormesis part I: Documentation, dose-response features and mechanistic foundations. Pharmacol Res 2016; 110:242-264. [DOI: 10.1016/j.phrs.2015.12.021] [Citation(s) in RCA: 113] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/23/2015] [Revised: 12/18/2015] [Accepted: 12/19/2015] [Indexed: 12/16/2022]
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Chen J, Hu R, Ge H, Duanmu W, Li Y, Xue X, Hu S, Feng H. G-protein-coupled receptor 30-mediated antiapoptotic effect of estrogen on spinal motor neurons following injury and its underlying mechanisms. Mol Med Rep 2015; 12:1733-40. [PMID: 25872489 PMCID: PMC4464192 DOI: 10.3892/mmr.2015.3601] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2014] [Accepted: 03/12/2015] [Indexed: 12/24/2022] Open
Abstract
Spinal cord injury (SCI) may result in severe dysfunction of motor neurons. G-protein-coupled receptor 30 (GPR30) expression in the motor neurons of the ventral horn of the spinal cord mediates neuroprotection through estrogen signaling. The present study explored the antiapoptotic effect of estrogen, mediated by GPR30 following SCI, and the mechanisms underlying this effect. Spinal motor neurons from rats were cultured in vitro in order to establish cell models of oxygen and glucose deprivation (OGD). The effects of estrogen, the estrogen agonist, G1, and the estrogen inhibitor, G15, on motor neurons were observed using MTT assays. The effects of E2, G1 and G15 on spinal motor neuron apoptosis following OGD, were detected using flow cytometry. The role of the phosphatidylinositol 3-kinase/protein kinase B (PI3K/Akt) inhibitor, LY294002, was also determined using flow cytometry. Rat SCI models were established. E2, G1 and E2+LY294002 were administered in vivo. Motor function was scored at 3, 7, 14, 21 and 28 d following injury, using Basso-Beattie-Bresnahan (BBB) standards. Cell activity in the estrogen and G1 groups was higher than that in the solvent group, whereas cell activity in the E2+G15 group was lower than that in the E2 group (P<0.05). Following OGD, the proportion of apoptotic cells significantly increased (P<0.05). The proportion in the estrogen group was significantly lower than that in the solvent group, whereas the proportion of apoptotic cells in the E2+G15 and E2+LY294002 groups was higher than that in the E2 group (P<0.05). Treatment with E2 and G1 led to upregulation of P-Akt expression in normal cells and post-OGD cells. The BBB scores of rats in the E2 and G1 groups were higher than those in the placebo group (P<0.05). The BBB scores of the E2+LY294002 group were lower than those of the E2 group (P<0.05). Estrogen thus appears to exert a protective effect on spinal motor neurons following OGD, via GPR30. The PI3K/Akt pathway may be one of those involved in the estrogen-related antiapoptotic effects mediated by GPR30.
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Affiliation(s)
- Jingyu Chen
- Department of Neurosurgery, Southwest Hospital, Third Military Medical University, Chongqing 400038, P.R. China
| | - Rong Hu
- Department of Neurosurgery, Southwest Hospital, Third Military Medical University, Chongqing 400038, P.R. China
| | - Hongfei Ge
- Department of Neurosurgery, Southwest Hospital, Third Military Medical University, Chongqing 400038, P.R. China
| | - Wangsheng Duanmu
- Department of Neurosurgery, Southwest Hospital, Third Military Medical University, Chongqing 400038, P.R. China
| | - Yuhong Li
- Department of Neurosurgery, Southwest Hospital, Third Military Medical University, Chongqing 400038, P.R. China
| | - Xingseng Xue
- Department of Neurosurgery, Southwest Hospital, Third Military Medical University, Chongqing 400038, P.R. China
| | - Shengli Hu
- Department of Neurosurgery, Southwest Hospital, Third Military Medical University, Chongqing 400038, P.R. China
| | - Hua Feng
- Department of Neurosurgery, Southwest Hospital, Third Military Medical University, Chongqing 400038, P.R. China
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Gao L, Zhu T, Xie G, Lou X, Li S, Zhou Y, Deng Z, Chu D, Lou J, Du D. GABA(A) receptor overexpression in the lateral hypothalamic area attenuates gastric ischemia‑reperfusion injury in rats. Mol Med Rep 2014; 11:1057-62. [PMID: 25354809 DOI: 10.3892/mmr.2014.2816] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2014] [Accepted: 08/22/2014] [Indexed: 11/05/2022] Open
Abstract
Excessive activation of the greater splanchnic nerve (GSN) has previously been determined to contribute to the progression of gastric ischemia‑reperfusion (GI‑R) injury. The present study was designed to estimate the protective effects of GABAA receptor (GABA(A)R) overexpression in the lateral hypothalamic area (LHA) against GI‑R injury. The GI‑R injury model was induced in rats by clamping the celiac artery for 30 min and then reperfusing for 1 h. Microinjection of recombinant adenoviral vectors overexpressing GABA(A)R (Ad‑GABA(A)R) or control adenoviral vectors (Ad‑Con) into the LHA was conducted in GI‑R and normal control rats. Significant protective effects were observed on day 2 after Ad‑GABA(A)R treatment in the GI‑R injury rats. Ad‑GABA(A)R treatment reduced plasma norepinephrine levels, plasma angiotensin II levels and peripheral GSN activity, but increased the gastric mucosal blood flow, as compared with Ad‑Con treatment. These results indicate that adenoviral vector‑induced GABA(A)R overexpression in the LHA blunts GSN activity and subsequently alleviates the effects of gastric injury in GI‑R rats.
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Affiliation(s)
- Lin Gao
- Department of Neurology, The Affiliated Second Hospital of Zhengzhou University, Zhengzhou, Henan 450014, P.R. China
| | - Tao Zhu
- Laboratory of Neuropharmacology and Neurotoxicology, Shanghai University, Shanghai 200444, P.R. China
| | - Guilin Xie
- Life Science College of Northeast Agricultural University, Harbin, Heilongjiang 150030, P.R. China
| | - Xiangxin Lou
- Department of Bioengineering, College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai 201620, P.R. China
| | - Shibao Li
- Department of Laboratory Medicine, Lianyungang Hospital Affiliated Bengbu Medical College, Lianyungang, Jiangsu 222006, P.R. China
| | - Yan Zhou
- Department of Laboratory Medicine, Lianyungang Hospital Affiliated Bengbu Medical College, Lianyungang, Jiangsu 222006, P.R. China
| | - Zhenxu Deng
- Department of Life Science, Heze University, Heze, Shandong 274500, P.R. China
| | - Dechang Chu
- Department of Life Science, Heze University, Heze, Shandong 274500, P.R. China
| | - Jiyu Lou
- Department of Neurology, The Affiliated Second Hospital of Zhengzhou University, Zhengzhou, Henan 450014, P.R. China
| | - Dongshu Du
- Laboratory of Neuropharmacology and Neurotoxicology, Shanghai University, Shanghai 200444, P.R. China
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16
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Yu C, He B, Xiong MH, Zhang H, Yuan L, Ma L, Dai WB, Wang J, Wang XL, Wang XQ, Zhang Q. The effect of hydrophilic and hydrophobic structure of amphiphilic polymeric micelles on their transport in epithelial MDCK cells. Biomaterials 2013; 34:6284-98. [DOI: 10.1016/j.biomaterials.2013.05.006] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2013] [Accepted: 05/07/2013] [Indexed: 12/16/2022]
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17
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Du DS, Zhu T, Ren ST, Xie GL, Li SB, Chu DC, Liu XT, Liu M, Ma XB, Zhou MH, Zhu DN, Deng ZX, Wang J. γ-Aminobutyric acid-mediated neurotransmission in cerebellar-hypothalamic circuit attenuates gastric mucosal injury induced by ischemia-reperfusion. Neurogastroenterol Motil 2013; 25:313-e249. [PMID: 23279161 DOI: 10.1111/nmo.12062] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
BACKGROUND Excessive greater splanchnic nerve (GSN) activation contributes to the progression of gastric ischemia-reperfusion (GI-R) injury. This study was designed to investigate the protective mechanism of cerebellar fastigial nucleus (FN) stimulation against GI-R injury. METHODS The GI-R injury model was induced in rats by clamping the celiac artery for 30 min, and then reperfusion for 30 min, 1, 3, 6, or 24 h, respectively. KEY RESULTS Microinjection of L-Glu (3, 6, 12 μg) into the FN dose-dependently attenuated GI-R injury and GSN activity. In addition, there was an enhancement of gastric mucosal blood flow in GI-R rats. Pretreatment with the glutamic acid decarboxylase antagonist into the FN, the GABAA receptor antagonist into the lateral hypothalamic area or lesion of superior cerebellar peduncle all reversed the protective effects of the FN stimulation. Furthermore, the FN stimulation reduced the TUNEL-positive gastric mucosal cell and Bax-positive gastric mucosal cell in GI-R rats. CONCLUSIONS & INFERENCES These results indicate that the protective effects of the FN stimulation against GI-R injury may be mediated by attenuation of the excessive GSN activation, gastric mucosal cell apoptosis, and Bax expression in GI-R rats.
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Affiliation(s)
- D S Du
- Department of Physiology and Pathophysiology, Shanghai Medical College of Fudan University, Shanghai, China
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Ischemic postconditioning during reperfusion attenuates oxidative stress and intestinal mucosal apoptosis induced by intestinal ischemia/reperfusion via aldose reductase. Surgery 2013; 153:555-64. [DOI: 10.1016/j.surg.2012.09.017] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2012] [Accepted: 09/25/2012] [Indexed: 01/07/2023]
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Zhu JZ, Fei SJ, Zhang JF, Zhu SP, Liu ZB, Li TT, Qiao X. Muscimol microinjection into cerebellar fastigial nucleus exacerbates stress-induced gastric mucosal damage in rats. Acta Pharmacol Sin 2013; 34:205-13. [PMID: 23247592 DOI: 10.1038/aps.2012.152] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
AIM To investigate the effects of microinjection of the GABA(A) receptor agonist muscimol into cerebellar fastigial nucleus (FN) on stress-induced gastric mucosal damage and the underlying mechanism in rats. METHODS Stress-induced gastric mucosal damage was induced in adult male SD rats by restraining and immersing them in cold water for 3 h. GABA(A) receptor agonist or antagonist was microinjected into the lateral FN. The decussation of superior cerebellar peduncle (DSCP) was electrically destroyed and the lateral hypothalamic area (LHA) was chemically ablated by microinjection of kainic acid. The pathological changes in the gastric mucosa were evaluated using TUNEL staining, immunohistochemistry staining and Western blotting. RESULTS Microinjection of muscimol (1.25, 2.5, and 5.0 μg) into FN significantly exacerbated the stress-induced gastric mucosal damage in a dose-dependent manner, whereas microinjection of GABA(A) receptor antagonist bicuculline attenuated the damage. The intensifying effect of muscimol on gastric mucosal damage was abolished by electrical lesion of DSCP or chemical ablation of LHA performed 3 d before microinjection of muscimol. Microinjection of muscimol markedly increased the discharge frequency of the greater splanchnic nerve, significantly increased the gastric acid volume and acidity, and further reduced the gastric mucosal blood flow. In the gastric mucosa, further reduced proliferation cells, enhanced apoptosis, and decreased anti-oxidant levels were observed following microinjection of muscimol. CONCLUSION Cerebellar FN participates in the regulation of stress-induced gastric mucosal damage, and cerebello-hypothalamic circuits contribute to the process.
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Lu P, Liu R, Ma EM, Yang TJ, Liu JL. Functional analysis of B7-H3 in colonic carcinoma cells. Asian Pac J Cancer Prev 2012; 13:3899-903. [PMID: 23098490 DOI: 10.7314/apjcp.2012.13.8.3899] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
B7-H3 is a newly discovered member of the B7/CD28 superfamily which functions as an important T-cell immune molecule. It has been reported recently that B7-H3 is highly expressed in many cancer cells, the data indicating that it may be a regulation factor contributing to tumor-resistance. In our study, we used bioinformatics to identify differentially expressed genes between colonic cancer cells and normal colonic cells, aiming to analyze mechanisms and identify sub-pathways closely related to progression, with the final aim of finding small molecule drugs which might interfere this progression. We found that ajmaline is one related factor which may enhance self-immunity in colon carcinoma therapy and B7-H3 plays important roles with regard to immunoreactions of colonic cancer cells. All the results indicate that H7-B3 is a favorable prognostic biomarker for colon carcinomas, providing novel information regarding likely targets for intervention.
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Affiliation(s)
- Peng Lu
- Department of Oncological Surgery, People's Hospital of Zhengzhou, Zhengzhou, China
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21
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Qiao WL, Wang GM, Shi Y, Wu JX, Qi YJ, Zhang JF, Sun H, Yan CD. Differential expression of Bcl-2 and Bax during gastric ischemia-reperfusion of rats. World J Gastroenterol 2011; 17:1718-24. [PMID: 21483632 PMCID: PMC3072636 DOI: 10.3748/wjg.v17.i13.1718] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/31/2010] [Revised: 12/21/2010] [Accepted: 12/28/2010] [Indexed: 02/06/2023] Open
Abstract
AIM: To investigate expression of Bcl-2 and Bax in gastric ischemia-reperfusion (GI-R) and involvement of extracellular signal-regulated kinase (ERK) 1/2 activation.
METHODS: The GI-R model was established by ligature of the celiac artery for 30 min and reperfusion in Sprague-Dawley rats. Rats were assigned to groups in accordance with their evaluation period: control, 0, 0.5, 1, 3, 6, 24, 48, and 72 h. Expression and distribution of Bcl-2 and Bax proteins were analyzed by immunohistochemistry and western blotting in gastric tissue samples after sacrifice.
RESULTS: Compared with controls, the percentage of positive cells and protein levels of Bcl-2 decreased in the early phases of reperfusion, reached its minimum at 1 h (P < 0.05); it then increased, reaching its peak at 24 h of reperfusion (P < 0.05). The pattern of Bax expression was opposite to that of Bcl-2. Bax expression increased after reperfusion, with its peak at 1 h of reperfusion (P < 0.05), and then it decreased gradually to a minimum at 24 h after reperfusion (P < 0.05). On the other hand, inhibition of activation of ERK1/2 induced by PD98059, a specific upstream MEK inhibitor, had significant effects on Bcl-2 and Bax in GI-R. Compared with GI-R treatment only at 3 h of reperfusion, PD98059 reduced the number of Bcl-2 positive cells (0.58% of R3h group, P < 0.05) and Bcl-2 protein level (74% of R3h group, P < 0.05) but increased the number of Bax-positive cells (1.33-fold vs R3h group, P < 0.05) and Bax protein level (1.35-fold of R3h group, P < 0.05).
CONCLUSION: These results indicated that the Bcl-2 and Bax played a pivotal role in the gastric mucosal I-R injury and repair by activation of ERK1/2.
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