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Li R, Lou Q, Ji T, Li Y, Yang H, Ma Z, Zhu Y, Qian C, Yang W, Wang Y, Luo S. Mechanism of Astragalus mongholicus Bunge ameliorating cerebral ischemia-reperfusion injury: Based on network pharmacology analysis and experimental verification. JOURNAL OF ETHNOPHARMACOLOGY 2024; 329:118157. [PMID: 38588987 DOI: 10.1016/j.jep.2024.118157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Revised: 03/25/2024] [Accepted: 04/04/2024] [Indexed: 04/10/2024]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Astragalus mongholicus Bunge (AMB) is a herb with wide application in traditional Chinese medicine, exerting a wealth of pharmacological effects. AMB has been proven to have an evident therapeutic effect on ischemic cerebrovascular diseases, including cerebral ischemia-reperfusion injury (CIRI). However, the specific mechanism underlying AMB in CIRI remains unclear. AIM OF THE STUDY This study aimed to investigate the potential role of AMB in CIRI through a comprehensive approach of network pharmacology and in vivo experimental research. METHODS The intersection genes of drugs and diseases were obtained through analysis of the Traditional Chinese Medicine Systems Pharmacology (TCMSP) database and Gene Expression Omnibus (GEO) database. The protein-protein interaction (PPI) network was created through the string website. Meanwhile, the gene ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) enrichment analysis was carried out using R studio, and thereafter the key genes were screened. Then, the molecular docking prediction was made between the main active ingredients and target genes, and hub genes with high binding energy were obtained. In addition, molecular dynamic (MD) simulation was used to validate the result of molecular docking. Based on the results of network pharmacology, we used animal experiments to verify the predicted hub genes. First, the rat middle cerebral artery occlusion and reperfusion (MACO/R) model was established and the effective dose of AMB in CIRI was determined by behavioral detection and 2,3,5-Triphenyltetrazolium chloride (TTC) staining. Then the target proteins corresponding to the hub genes were measured by Western blot. Moreover, the level of neuronal death was measured using hematoxylin and eosin (HE) and Nissl staining. RESULTS Based on the analysis of the TCMSP database and GEO database, a total of 62 intersection target genes of diseases and drugs were obtained. The KEGG enrichment analysis showed that the therapeutic effect of AMB on CIRI might be realized through the advanced glycation endproduct-the receptor of advanced glycation endproduct (AGE-RAGE) signaling pathway in diabetic complications, nuclear factor kappa-B (NF-κB) signaling pathway and other pathways. Molecular docking results showed that the active ingredients of AMB had good binding potential with hub genes that included Prkcb, Ikbkb, Gsk3b, Fos and Rela. Animal experiments showed that AWE (60 g/kg) could alleviate CIRI by regulating the phosphorylation of PKCβ, IKKβ, GSK3β, c-Fos and NF-κB p65 proteins. CONCLUSION AMB exerts multi-target and multi-pathway effects against CIRI, and the underlying mechanism may be related to anti-apoptosis, anti-inflammation, anti-oxidative stress and inhibiting calcium overload.
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Affiliation(s)
- Rui Li
- Anhui Medical College (Anhui Academy of Medical Sciences), Hefei, 230061, PR China
| | - Qi Lou
- Department of Pharmacology, School of Basic Medicine, Anhui Medical University, Hefei, 230031, PR China
| | - Tingting Ji
- Department of Pharmacy, Anhui Medical College, Hefei, 230601, PR China
| | - Yincan Li
- Department of Pharmacology, Basic Medical College, Anhui Medical University, Hefei, 230032, PR China
| | - Haoran Yang
- Department of Pharmacy, Anhui Medical College, Hefei, 230601, PR China
| | - Zheng Ma
- Anhui Medical College (Anhui Academy of Medical Sciences), Hefei, 230061, PR China
| | - Yu Zhu
- Anhui Medical College (Anhui Academy of Medical Sciences), Hefei, 230061, PR China
| | - Can Qian
- Anhui Medical College (Anhui Academy of Medical Sciences), Hefei, 230061, PR China
| | - Wulin Yang
- Anhui Province Key Laboratory of Medical Physics and Technology, Institute of Health and Medical Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, 230031, PR China.
| | - Yijun Wang
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, 130 Changjiang West Road, Hefei, 230036, PR China.
| | - Shengyong Luo
- Anhui Medical College (Anhui Academy of Medical Sciences), Hefei, 230061, PR China; Department of Pharmacology, School of Basic Medicine, Anhui Medical University, Hefei, 230031, PR China.
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Xue D, Wei C, Zhou Y, Wang K, Zhou Y, Chen C, Li Y, Sheng L, Lu B, Zhu Z, Cai W, Ning X, Li S, Qi T, Pi J, Lin S, Yan G, Huang Y, Yin W. TRIOL Inhibits Rapid Intracellular Acidification and Cerebral Ischemic Injury: The Role of Glutamate in Neuronal Metabolic Reprogramming. ACS Chem Neurosci 2022; 13:2110-2121. [PMID: 35770894 DOI: 10.1021/acschemneuro.2c00119] [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] [Indexed: 11/29/2022] Open
Abstract
As one of the key injury incidents, tissue acidosis in the brain occurs very quickly within several minutes upon the onset of ischemic stroke. Glutamate, an excitatory amino acid inducing neuronal excitotoxicity, has been reported to trigger the decrease in neuronal intracellular pH (pHi) via modulating proton-related membrane transporters. However, there remains a lack of clarity on the possible role of glutamate in neuronal acidosis via regulating metabolism. Here, we show that 200 μM glutamate treatment quickly promotes glycolysis and inhibits mitochondrial oxidative phosphorylation of primary cultured neurons within 15 min, leading to significant cytosolic lactate accumulation, which contributes to the rapid intracellular acidification and neuronal injury. The reprogramming of neuronal metabolism by glutamate is dependent on adenosine monophosphate-activated protein kinase (AMPK) signaling since the inhibition of AMPK activation by its selective inhibitor compound C significantly reverses these deleterious events in vitro. Moreover, 5α-androst-3β,5α,6β-TRIOL (TRIOL), a neuroprotectant we previously reported, can also remarkably reverse intracellular acidification and alleviate neuronal injury through the inhibition of AMPK signaling. Furthermore, TRIOL remarkably reduced the infarct volume and attenuated neurologic impairment in acute ischemic stroke models of middle cerebral artery occlusion in vivo. In summary, we reveal a novel role of glutamate in rapid intracellular acidification injury resulting from glutamate-induced lactate accumulation through AMPK-mediated neuronal reprogramming. Moreover, inhibition of the quick drop in neuronal pHi by TRIOL significantly reduces the cerebral damages, suggesting that it is a promising drug candidate for ischemic stroke.
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Affiliation(s)
- DongDong Xue
- Department of Pharmacology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou 510080, China
| | - CaiLv Wei
- Department of Molecular Biology and Biochemistry, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou 510080, China
| | - YueHan Zhou
- Department of Pharmacology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou 510080, China
| | - Kai Wang
- University College London, London WC1E 6BT, U.K
| | - YuWei Zhou
- Department of Pharmacology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou 510080, China
| | - Chen Chen
- Department of Pharmacology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou 510080, China
| | - Yuan Li
- Department of Pharmacology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou 510080, China
| | - LongXiang Sheng
- Department of Pharmacology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou 510080, China
| | - BingZheng Lu
- Department of Pharmacology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou 510080, China
| | - Zhu Zhu
- Department of Pharmacology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou 510080, China
| | - Wei Cai
- Department of Molecular Biology and Biochemistry, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou 510080, China
| | - XinPeng Ning
- Department of Molecular Biology and Biochemistry, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou 510080, China
| | - ShengLong Li
- Department of Molecular Biology and Biochemistry, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou 510080, China
| | - TianYu Qi
- Department of Molecular Biology and Biochemistry, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou 510080, China
| | - JiaKai Pi
- Guangzhou Foreign Language School, Guangzhou 511400, China
| | - SuiZhen Lin
- Guangzhou Cellprotek Pharmaceutical Co., Ltd., Guangzhou 510663, China
| | - GuangMei Yan
- Department of Pharmacology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou 510080, China
| | - YiJun Huang
- Department of Pharmacology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou 510080, China
| | - Wei Yin
- Department of Molecular Biology and Biochemistry, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou 510080, China
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Aldbass A, Amina M, Al Musayeib NM, Bhat RS, Al-Rashed S, Marraiki N, Fahmy R, El-Ansary A. Cytotoxic and anti-excitotoxic effects of selected plant and algal extracts using COMET and cell viability assays. Sci Rep 2021; 11:8512. [PMID: 33875747 PMCID: PMC8055880 DOI: 10.1038/s41598-021-88089-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Accepted: 04/05/2021] [Indexed: 12/28/2022] Open
Abstract
Excess glutamate in the central nervous system may be a major cause of neurodegenerative diseases with gradual loss and dysfunction of neurons. Primary or secondary metabolites from medicinal plants and algae show potential for treatment of glutamate-induced excitotoxicity. Three plant extracts were evaluated for impact on glutamate excitotoxicity-induced in primary cultures of retinal ganglion cells (RGC). These cells were treated separately in seven groups: control; Plicosepalus. curviflorus treated; Saussurea lappa treated; Cladophora glomerate treated. Cells were treated independently with 5, 10, 50, or 100 µg/ml of extracts of plant or alga material, respectively, for 2 h. Glutamate-treated cells (48 h with 5, 10, 50, or 100 µM glutamate); and P. curviflorus/glutamate; S. lappa/glutamate; C. glomerata/glutamate [pretreatment with extract for 2 h (50 and 100 µg/ml) before glutamate treatment with 100 µM for 48 h]. Comet and MTT assays were used to assess cell damage and cell viability. The number of viable cells fell significantly after glutamate exposure. Exposure to plant extracts caused no notable effect of viability. All tested plants extracts showed a protective effect against glutamate excitotoxicity-induced RGC death. Use of these extracts for neurological conditions related to excitotoxicity and oxidative stress might prove beneficial.
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Affiliation(s)
- Abeer Aldbass
- Biochemistry Department, College of Sciences, King Saud University, Riyadh, Saudi Arabia
| | - Musarat Amina
- Department of Pharmacognosy, Pharmacy College, King Saud University, Riyadh, 11451, Saudi Arabia
| | - Nawal M Al Musayeib
- Department of Pharmacognosy, Pharmacy College, King Saud University, Riyadh, 11451, Saudi Arabia
| | - Ramesa Shafi Bhat
- Biochemistry Department, College of Sciences, King Saud University, Riyadh, Saudi Arabia
| | - Sara Al-Rashed
- Botany and Microbiology Department, College of Sciences, King Saud University, Riyadh, Saudi Arabia
| | - Najat Marraiki
- Botany and Microbiology Department, College of Sciences, King Saud University, Riyadh, Saudi Arabia
| | - Rania Fahmy
- Department of Ophthalmology, Faculty of Medicine, Cairo University, Giza, Egypt
- Department of Optometry, College of Applied Medical Sciences, King Saud University, Riyadh, Saudi Arabia
| | - Afaf El-Ansary
- Central Laboratory, Female Center for Scientific and Medical Studies, King Saud University, Riyadh, Saudi Arabia.
- CONEM Saudi Autism Research Group, King Saud University, Riyadh, Saudi Arabia.
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The sodium-hydrogen antiporter: a new target to boost post-ischemic angiogenesis in diabetes? Int J Cardiol 2019; 277:220-221. [PMID: 30322660 DOI: 10.1016/j.ijcard.2018.09.115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/25/2018] [Accepted: 09/28/2018] [Indexed: 11/21/2022]
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Zhu X, Liu Y, Huang H, Zhang Y, Huang S, Zhou W, Bian X, Shen S, Cao S. PKCβII-induced upregulation of PGP9.5 and VEGF in postoperative persistent pain in rats. J Pain Res 2018; 11:2095-2106. [PMID: 30310311 PMCID: PMC6166760 DOI: 10.2147/jpr.s144852] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Purpose Postoperative pain is a common clinical problem. In this study, we aimed to investigate the role of protein kinase C βII (PKCβII) in the progression of postoperative pain following skin/muscle incision and retraction (SMIR) surgery. Materials and methods SMIR postoperative pain model was established in rats, akin to a clinical procedure. The expression level and location of p-PKCβII were observed in dorsal root ganglion (DRG) or spinal cord from SMIR-operated rats by Western blotting and immunofluorescence. In addition, the effects of PKCβII on the expression of protein gene product 9.5 (PGP9.5) or vascular endothelial growth factor (VEGF) were assessed by using pharmacological activator and inhibitor of PKCβII. Moreover, mechanical withdrawal threshold (MWT) was assessed before or after SMIR-operated rats were treated with inhibitor or activator of PKCβII. Results The expression of PKCβII in DRG and spinal cord was significantly increased after SMIR surgery (P < 0.001, P < 0.01) and expression of PKCβII was located in the neurons of the spinal cord, and magnocellular neurons, non-peptide neurons, and peptide neurons in DRG. Besides, compared with skin/muscle incision group, retraction caused a marked increase in the expression of PKCβII and a significant decrease of MWT (P < 0.001, P < 0.05). The activator of PKCβII greatly increased the expression of PGP9.5 and VEGF (P < 0.05, P < 0.01) and enhanced MWT (P < 0.001), while inhibitor of PKCβII decreased the expression of PGP9.5 and VEGF and attenuated MWT (P < 0.05, P < 0.01, P < 0.001). Conclusion Activation of PKCβII signaling pathways might be an important mechanism in the progression of postoperative pain.
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Affiliation(s)
- Xiang Zhu
- Department of Anesthesiology, Affiliated Hospital of Nantong University, Nantong, Jiangsu 226001, People's Republic of China, ;
| | - Yuxi Liu
- Department of Anesthesiology, Affiliated Hospital of Nantong University, Nantong, Jiangsu 226001, People's Republic of China, ;
| | - Hongfang Huang
- Department of Anesthesiology, Affiliated Hospital of Nantong University, Nantong, Jiangsu 226001, People's Republic of China, ;
| | - Yonghua Zhang
- Department of Anesthesiology, Affiliated Hospital of Nantong University, Nantong, Jiangsu 226001, People's Republic of China, ;
| | - Saisai Huang
- Department of Anesthesiology, Affiliated Hospital of Nantong University, Nantong, Jiangsu 226001, People's Republic of China, ;
| | - Weiwei Zhou
- Department of Anesthesiology, Affiliated Hospital of Nantong University, Nantong, Jiangsu 226001, People's Republic of China, ;
| | - Xiaocui Bian
- Department of Anesthesiology, Affiliated Hospital of Nantong University, Nantong, Jiangsu 226001, People's Republic of China, ;
| | - Shiren Shen
- Department of Anesthesiology, Affiliated Hospital of Nantong University, Nantong, Jiangsu 226001, People's Republic of China, ;
| | - Su Cao
- Department of Anesthesiology, Affiliated Hospital of Nantong University, Nantong, Jiangsu 226001, People's Republic of China, ;
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Lee BK, Jung YS. Sustained Intracellular Acidosis Triggers the Na⁺/H⁺ Exchager-1 Activation in Glutamate Excitotoxicity. Biomol Ther (Seoul) 2017; 25:593-598. [PMID: 28605830 PMCID: PMC5685428 DOI: 10.4062/biomolther.2017.018] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2017] [Revised: 03/08/2017] [Accepted: 03/18/2017] [Indexed: 11/18/2022] Open
Abstract
The Na+/H+ exchanger-1 (NHE-1) is a ubiquitously expressed pH-regulatory membrane protein that functions in the brain, heart, and other organs. It is increased by intracellular acidosis through the interaction of intracellular H+ with an allosteric modifier site in the transport domain. In the previous study, we reported that glutamate-induced NHE-1 phosphorylation mediated by activation of protein kinase C-β (PKC-β) in cultured neuron cells via extracellular signal-regulated kinases (ERK)/p90 ribosomal s6 kinases (p90RSK) pathway results in NHE-1 activation. However, whether glutamate stimulates NHE-1 activity solely by the allosteric mechanism remains elusive. Cultured primary cortical neuronal cells were subjected to intracellular acidosis by exposure to 100 μM glutamate or 20 mM NH4Cl. After the desired duration of intracellular acidosis, the phosphorylation and activation of PKC-β, ERK1/2 and p90RSK were determined by Western blotting. We investigated whether the duration of intracellular acidosis is controlled by glutamate exposure time. The NHE-1 activation increased while intracellular acidosis sustained for >3 min. To determine if sustained intracellular acidosis induced NHE-1 phosphorylation, we examined phosphorylation of NHE-1 induced by intracellular acidosis by transient exposure to NH4Cl. Sustained intracellular acidosis led to activation and phosphorylation of NHE-1. In addition, sustained intracellular acidosis also activated the PKC-β, ERK1/2, and p90RSK in neuronal cells. We conclude that glutamate stimulates NHE-1 activity through sustained intracellular acidosis, which mediates NHE-1 phosphorylation regulated by PKC-β/ERK1/2/p90RSK pathway in neuronal cells.
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Affiliation(s)
- Bo Kyung Lee
- College of Pharmacy, Ajou University, Suwon 16499, Republic of Korea
| | - Yi-Sook Jung
- College of Pharmacy, Ajou University, Suwon 16499, Republic of Korea.,Research Institute of Pharmaceutical Sciences and Technology, Ajou University, Suwon 16499, Republic of Korea
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Allium cepa Extract and Quercetin Protect Neuronal Cells from Oxidative Stress via PKC- ε Inactivation/ERK1/2 Activation. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2016; 2016:2495624. [PMID: 27668036 PMCID: PMC5030440 DOI: 10.1155/2016/2495624] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/28/2016] [Accepted: 08/17/2016] [Indexed: 01/28/2023]
Abstract
Oxidative stress plays an important role in the pathophysiology of various neurologic disorders. Allium cepa extract (ACE) and their main flavonoid component quercetin (QCT) possess antioxidant activities and protect neurons from oxidative stress. We investigated the underlying molecular mechanisms, particularly those linked to the antioxidant effects of the ACE. Primary cortical neuronal cells derived from mouse embryos were preincubated with ACE or QCT for 30 min and exposed to L-buthionine sulfoximine for 4~24 h. We found that ACE and QCT significantly decreased neuronal death and the ROS increase induced by L-buthionine-S, R-sulfoximine (BSO) in a concentration-dependent manner. Furthermore, ACE and QCT activated extracellular signal-regulated kinase 1/2 (ERK1/2), leading to downregulation of protein kinase C-ε (PKC-ε) in BSO-stimulated neuronal cells. In addition, ACE and QCT decreased the phosphorylated levels of p38 mitogen-activated protein kinase. Our results provide new insight into the protective mechanism of ACE and QCT against oxidative stress in neuronal cells. The results suggest that the inactivation of PKC-ε induced by phosphorylating ERK1/2 is responsible for the neuroprotective effect of ACE and QCT against BSO-induced oxidative stress.
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Demyanenko SV, Panchenko SN, Uzdensky AB. Expression of neuronal and signaling proteins in penumbra around a photothrombotic infarction core in rat cerebral cortex. BIOCHEMISTRY (MOSCOW) 2016; 80:790-9. [PMID: 26531025 DOI: 10.1134/s0006297915060152] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Photodynamic impact on animal cerebral cortex using water-soluble Bengal Rose as a photosensitizer, which does not cross the blood-brain barrier and remains in blood vessels, induces platelet aggregation, vessel occlusion, and brain tissue infarction. This reproduces ischemic stroke. Irreversible cell damage within the infarction core propagates to adjacent tissue and forms a transition zone - the penumbra. Tissue necrosis in the infarction core is too fast (minutes) to be prevented, but much slower penumbral injury (hours) can be limited. We studied the changes in morphology and protein expression profile in penumbra 1 h after local photothrombotic infarction induced by laser irradiation of the cerebral cortex after Bengal Rose administration. Morphological study using standard hematoxylin/eosin staining showed a 3-mm infarct core surrounded by 1.5-2.0 mm penumbra. Morphological changes in the penumbra were lesser and decreased towards its periphery. Antibody microarrays against 224 neuronal and signaling proteins were used for proteomic study. The observed upregulation of penumbra proteins involved in maintaining neurite integrity and guidance (NAV3, MAP1, CRMP2, PMP22); intercellular interactions (N-cadherin); synaptic transmission (glutamate decarboxylase, tryptophan hydroxylase, Munc-18-1, Munc-18-3, and synphilin-1); mitochondria quality control and mitophagy (PINK1 and Parkin); ubiquitin-mediated proteolysis and tissue clearance (UCHL1, PINK1, Parkin, synphilin-1); and signaling proteins (PKBα and ERK5) could be associated with tissue recovery. Downregulation of PKC, PKCβ1/2, and TDP-43 could also reduce tissue injury. These changes in expression of some neuronal proteins were directed mainly to protection and tissue recovery in the penumbra. Some upregulated proteins might serve as markers of protection processes in a penumbra.
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Affiliation(s)
- S V Demyanenko
- Academy of Biology and Biotechnology, Southern Federal University, Rostov-on-Don, 344090, Russia.
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Staiger EA, Albright JD, Brooks SA. Genome‐wide association mapping of heritable temperament variation in the
T
ennessee
W
alking
H
orse. GENES BRAIN AND BEHAVIOR 2016; 15:514-26. [DOI: 10.1111/gbb.12290] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2015] [Revised: 03/03/2016] [Accepted: 03/11/2016] [Indexed: 12/26/2022]
Affiliation(s)
- E. A. Staiger
- Department of Animal Science Cornell University Ithaca NY
| | - J. D. Albright
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine University of Tennessee Knoxville TN
| | - S. A. Brooks
- Department of Animal Science University of Florida Gainesville FL USA
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Ma D, Fang Q, Wang P, Gao R, Wu W, Lu T, Cao L, Hu X, Wang J. Induction of heme oxygenase-1 by Na+-H+ exchanger 1 protein plays a crucial role in imatinib-resistant chronic myeloid leukemia cells. J Biol Chem 2015; 290:12558-71. [PMID: 25802333 DOI: 10.1074/jbc.m114.626960] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2014] [Indexed: 12/18/2022] Open
Abstract
Resistance toward imatinib (IM) and other BCR/ABL tyrosine kinase inhibitors remains troublesome in the treatment of advanced stage chronic myeloid leukemia (CML). The aim of this study was to estimate the reversal effects of down-regulation of Na(+)/H(+) exchanger 1 (NHE1) on the chemoresistance of BCR-ABL-positive leukemia patients' cells and cell lines. After treatment with the specific NHE1 inhibitor cariporide to decrease intracellular pH (pHi), the heme oxygenase-1 (HO-1) levels of the K562R cell line and cells from IM-insensitive CML patients decreased. HO-1, as a Bcr/Abl-dependent survival molecule in CML cells, is important for the resistance to tyrosine kinase inhibitors in patients with newly diagnosed CML or IM-resistant CML. Silencing PKC-β and Nrf-2 or treatment with inhibitors of p38 pathways obviously blocked NHE1-induced HO-1 expression. Furthermore, treatment with HO-1 or p38 inhibitor plus IM increased the apoptosis of the K562R cell line and IM-insensitive CML patients' cells. Inhibiting HO-1 enhanced the activation of caspase-3 and poly(ADP-ribose) polymerase-1. Hence, the results support the anti-apoptotic role of HO-1 induced by NHE1 in the K562R cell line and IM-insensitive CML patients and provide a mechanism by which inducing HO-1 expression via the PKC-β/p38-MAPK pathway may promote tumor resistance to oxidative stress.
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Affiliation(s)
- Dan Ma
- From the Department of Hematology, Affiliated Hospital of Guiyang Medical University, Guiyang 550004, China, Department of Pharmacy, Affiliated BaiYun Hospital of Guiyang Medical University, Guiyang 550014, China
| | - Qin Fang
- Department of Pharmacy, Affiliated BaiYun Hospital of Guiyang Medical University, Guiyang 550014, China, Department of Pharmacy, Affiliated Hospital of Guiyang Medical University, Guiyang 550004, China, and
| | - Ping Wang
- From the Department of Hematology, Affiliated Hospital of Guiyang Medical University, Guiyang 550004, China, Guizhou Province Hematopoietic Stem Cell Transplantation Center and Key Laboratory of Hematological Disease Diagnostic and Treatment Centre, Guiyang 550004, China
| | - Rui Gao
- From the Department of Hematology, Affiliated Hospital of Guiyang Medical University, Guiyang 550004, China, Guizhou Province Hematopoietic Stem Cell Transplantation Center and Key Laboratory of Hematological Disease Diagnostic and Treatment Centre, Guiyang 550004, China
| | - Weibing Wu
- From the Department of Hematology, Affiliated Hospital of Guiyang Medical University, Guiyang 550004, China, Guizhou Province Hematopoietic Stem Cell Transplantation Center and Key Laboratory of Hematological Disease Diagnostic and Treatment Centre, Guiyang 550004, China
| | - Tangsheng Lu
- School of Pharmacy, Guiyang Medical University, Guiyang 550004, China
| | - Lu Cao
- School of Pharmacy, Guiyang Medical University, Guiyang 550004, China
| | - Xiuying Hu
- From the Department of Hematology, Affiliated Hospital of Guiyang Medical University, Guiyang 550004, China, Guizhou Province Hematopoietic Stem Cell Transplantation Center and Key Laboratory of Hematological Disease Diagnostic and Treatment Centre, Guiyang 550004, China
| | - Jishi Wang
- From the Department of Hematology, Affiliated Hospital of Guiyang Medical University, Guiyang 550004, China, Guizhou Province Hematopoietic Stem Cell Transplantation Center and Key Laboratory of Hematological Disease Diagnostic and Treatment Centre, Guiyang 550004, China,
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Shen Y, Tian Y, Shi X, Yang J, Ouyang L, Gao J, Lu J. Exposure to high glutamate concentration activates aerobic glycolysis but inhibits ATP-linked respiration in cultured cortical astrocytes. Cell Biochem Funct 2014; 32:530-7. [PMID: 25077445 DOI: 10.1002/cbf.3047] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2014] [Revised: 06/18/2014] [Accepted: 06/23/2014] [Indexed: 11/06/2022]
Abstract
Astrocytes play a key role in removing the synaptically released glutamate from the extracellular space and maintaining the glutamate below neurotoxic level in the brain. However, high concentration of glutamate leads to toxicity in astrocytes, and the underlying mechanisms are unclear. The purpose of this study was to investigate whether energy metabolism disorder, especially impairment of mitochondrial respiration, is involved in the glutamate-induced gliotoxicity. Exposure to 10-mM glutamate for 48 h stimulated glycolysis and respiration in astrocytes. However, the increased oxygen consumption was used for proton leak and non-mitochondrial respiration, but not for oxidative phosphorylation and ATP generation. When the exposure time extended to 72 h, glycolysis was still activated for ATP generation, but the mitochondrial ATP-linked respiration of astrocytes was reduced. The glutamate-induced astrocyte damage can be mimicked by the non-metabolized substrate d-aspartate but reversed by the non-selective glutamate transporter inhibitor TBOA. In addition, the glutamate toxicity can be partially reversed by vitamin E. These findings demonstrate that changes of bioenergetic profile occur in cultured cortical astrocytes exposed to high concentration of glutamate and highlight the role of mitochondria respiration in glutamate-induced gliotoxicity in cortical astrocytes.
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Affiliation(s)
- Yao Shen
- Key Laboratory of Laboratory Medicine, Ministry of Education, Zhejiang Provincial Key Laboratory of Medical Genetics, College of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, Zhejiang, China
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