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Liu K, Li Z, Li L, Heyward S, Wang SR, He L, Wang H. Mechanistic Understanding of Dexamethasone-Mediated Protection against Remdesivir-Induced Hepatotoxicity. Mol Pharmacol 2024; 106:71-82. [PMID: 38769019 DOI: 10.1124/molpharm.124.000894] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2024] [Revised: 04/24/2024] [Accepted: 05/01/2024] [Indexed: 05/22/2024] Open
Abstract
Remdesivir (RDV), a broad-spectrum antiviral agent, is often used together with dexamethasone (DEX) for hospitalized COVID-19 patients requiring respiratory support. Potential hepatic adverse drug reaction is a safety concern associated with the use of RDV. We previously reported that DEX cotreatment effectively mitigates RDV-induced hepatotoxicity and reduces elevated serum alanine aminotransferase and aspartate aminotransferase levels in cultured human primary hepatocytes (HPH) and hospitalized COVID-19 patients, respectively. Yet, the precise mechanism behind this protective drug-drug interaction remains largely unknown. Here, we show that through the activation of p38, c-Jun N-terminal kinase (JNK), and extracellular signal-regulated kinases 1 and 2 (ERK1/2) signaling, RDV induces apoptosis (cleavage of caspases 8, 9, and 3), autophagy (increased autophagosome and LC3-II), and mitochondrial damages (decreased membrane potential, respiration, ATP levels, and increased expression of Bax and the released cytosolic cytochrome C) in HPH. Importantly, cotreatment with DEX partially reversed RDV-induced apoptosis, autophagy, and cell death. Mechanistically, DEX deactivates/dephosphorylates p38, JNK, and ERK1/2 signaling by enhancing the expression of dual specificity protein phosphatase 1 (DUSP1), a mitogen-activated protein kinase (MAPK) phosphatase, in a glucocorticoid receptor (GR)-dependent manner. Knockdown of GR in HPH attenuates DEX-mediated DUSP1 induction, MAPK dephosphorylation, as well as protection against RDV-induced hepatotoxicity. Collectively, our findings suggest a molecular mechanism by which DEX modulates the GR-DUSP1-MAPK regulatory axis to alleviate the adverse actions of RDV in the liver. SIGNIFICANCE STATEMENT: The research uncovers the molecular mechanisms by which dexamethasone safeguards against remdesivir-associated liver damage in the context of COVID-19 treatment.
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Affiliation(s)
- Kaiyan Liu
- Department of Pharmaceutical Sciences, University of Maryland School of Pharmacy, Baltimore, Maryland (K.L., Z.L., L.L., S.R.W., H.W.); BioIVT, Halethorpe, Maryland (S.H.); and Department of Pediatrics, Johns Hopkins University School of Medicine, Baltimore, Maryland (L.H.)
| | - Zhihui Li
- Department of Pharmaceutical Sciences, University of Maryland School of Pharmacy, Baltimore, Maryland (K.L., Z.L., L.L., S.R.W., H.W.); BioIVT, Halethorpe, Maryland (S.H.); and Department of Pediatrics, Johns Hopkins University School of Medicine, Baltimore, Maryland (L.H.)
| | - Linhao Li
- Department of Pharmaceutical Sciences, University of Maryland School of Pharmacy, Baltimore, Maryland (K.L., Z.L., L.L., S.R.W., H.W.); BioIVT, Halethorpe, Maryland (S.H.); and Department of Pediatrics, Johns Hopkins University School of Medicine, Baltimore, Maryland (L.H.)
| | - Scott Heyward
- Department of Pharmaceutical Sciences, University of Maryland School of Pharmacy, Baltimore, Maryland (K.L., Z.L., L.L., S.R.W., H.W.); BioIVT, Halethorpe, Maryland (S.H.); and Department of Pediatrics, Johns Hopkins University School of Medicine, Baltimore, Maryland (L.H.)
| | - Shelley R Wang
- Department of Pharmaceutical Sciences, University of Maryland School of Pharmacy, Baltimore, Maryland (K.L., Z.L., L.L., S.R.W., H.W.); BioIVT, Halethorpe, Maryland (S.H.); and Department of Pediatrics, Johns Hopkins University School of Medicine, Baltimore, Maryland (L.H.)
| | - Ling He
- Department of Pharmaceutical Sciences, University of Maryland School of Pharmacy, Baltimore, Maryland (K.L., Z.L., L.L., S.R.W., H.W.); BioIVT, Halethorpe, Maryland (S.H.); and Department of Pediatrics, Johns Hopkins University School of Medicine, Baltimore, Maryland (L.H.)
| | - Hongbing Wang
- Department of Pharmaceutical Sciences, University of Maryland School of Pharmacy, Baltimore, Maryland (K.L., Z.L., L.L., S.R.W., H.W.); BioIVT, Halethorpe, Maryland (S.H.); and Department of Pediatrics, Johns Hopkins University School of Medicine, Baltimore, Maryland (L.H.)
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Han X, Leng C, Zhao S, Wang S, Chen S, Wang S, Zhang M, Li X, Lu Y, Wang B, Qi W. Development and verification of a manganese metabolism- and immune-related genes signature for prediction of prognosis and immune landscape in gastric cancer. Front Immunol 2024; 15:1377472. [PMID: 38807601 PMCID: PMC11131102 DOI: 10.3389/fimmu.2024.1377472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2024] [Accepted: 04/29/2024] [Indexed: 05/30/2024] Open
Abstract
Background Gastric cancer (GC) poses a global health challenge due to its widespread prevalence and unfavorable prognosis. Although immunotherapy has shown promise in clinical settings, its efficacy remains limited to a minority of GC patients. Manganese, recognized for its role in the body's anti-tumor immune response, has the potential to enhance the effectiveness of tumor treatment when combined with immune checkpoint inhibitors. Methods Gene Expression Omnibus (GEO) and The Cancer Genome Atlas (TCGA) databases was utilized to obtain transcriptome information and clinical data for GC. Unsupervised clustering was employed to stratify samples into distinct subtypes. Manganese metabolism- and immune-related genes (MIRGs) were identified in GC by univariate Cox regression and least absolute shrinkage and selection operator (LASSO) regression analysis. We conducted gene set variation analysis, and assessed the immune landscape, drug sensitivity, immunotherapy efficacy, and somatic mutations. The underlying role of NPR3 in GC was further analyzed in the single-cell RNA sequencing data and cellular experiments. Results GC patients were classified into four subtypes characterized by significantly different prognoses and tumor microenvironments. Thirteen genes were identified and established as MIRGs, demonstrating exceptional predictive effectiveness in GC patients. Distinct enrichment patterns of molecular functions and pathways were observed among various risk subgroups. Immune infiltration analysis revealed a significantly greater abundance of macrophages and monocytes in the high-risk group. Drug sensitivity analysis identified effective drugs for patients, while patients in the low-risk group could potentially benefit from immunotherapy. NPR3 expression was significantly downregulated in GC tissues. Single-cell RNA sequencing analysis indicated that the expression of NPR3 was distributed in endothelial cells. Cellular experiments demonstrated that NPR3 facilitated the proliferation of GC cells. Conclusion This is the first study to utilize manganese metabolism- and immune-related genes to identify the prognostic MIRGs for GC. The MIRGs not only reliably predicted the clinical outcome of GC patients but also hold the potential to guide future immunotherapy interventions for these patients.
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Affiliation(s)
- Xiaoxi Han
- Department of Oncology, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Chuanyu Leng
- Department of Oncology, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Shufen Zhao
- Department of Oncology, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Shasha Wang
- Department of Oncology, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Shuming Chen
- Department of Oncology, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Shibo Wang
- Department of Oncology, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Mengqi Zhang
- Department of Oncology, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Xiangxue Li
- Department of Oncology, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Yangyang Lu
- Department of Oncology, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Bing Wang
- Biomedical Centre, Qingdao University, Qingdao, China
| | - Weiwei Qi
- Department of Oncology, The Affiliated Hospital of Qingdao University, Qingdao, China
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Chen Y, Ma T. LAMP5 may promote MM progression by activating p38. Pathol Oncol Res 2023; 29:1611083. [PMID: 37033323 PMCID: PMC10073510 DOI: 10.3389/pore.2023.1611083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/28/2023] [Accepted: 03/13/2023] [Indexed: 04/11/2023]
Abstract
Multiple myeloma (MM) is the second most common tumor of the hematologic system. MM remains incurable at this time. In this study, we used bioinformatics analysis to find key genes in the pathogenesis of MM. We first found that Lysosome associated membrane protein 5 (LAMP5) expression was sequentially increased in healthy donors (HD), monoclonal gammopathy of undetermined significance (MGUS), smoldering multiple myeloma (SMM) and newly diagnosed MM (NDMM), relapsed MM (RMM). We collected bone marrow from patients with NDMM, HD and post-treatment MM (PTMM) and performed qPCR analysis of LAMP5, and found that the expression of LAMP5 is stronger in NDMM than in HD, and decreases after treatment. Western blotting assay also found more expression of LAMP5 in NDMM than in HD. Patients with high LAMP5 expression have a higher DS (Durie-Salmon) stage and worse prognosis. We next verified the expression of LAMP5 in four MM cell lines and silenced LAMP5 expression in RPMI-8226 and AMO-1, and explored the effects of LAMP5 silencing on MM cell apoptosis and cell cycle by flow cytometry and western blotting. Knockdown of LAMP5 promoted apoptosis in MM cells, but had no effect on the cell cycle. Mechanistically, LAMP5 may exert its pro-tumor effects in MM in part through activation of p38 protein. We screened LAMP5 for the first time as a key gene for MM progression and recurrence, and found that LAMP5 may exert its pro-tumor effects in MM through activation of p38 protein.
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Rozenberg JM, Kamynina M, Sorokin M, Zolotovskaia M, Koroleva E, Kremenchutckaya K, Gudkov A, Buzdin A, Borisov N. The Role of the Metabolism of Zinc and Manganese Ions in Human Cancerogenesis. Biomedicines 2022; 10:biomedicines10051072. [PMID: 35625809 PMCID: PMC9139143 DOI: 10.3390/biomedicines10051072] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2022] [Revised: 04/30/2022] [Accepted: 05/03/2022] [Indexed: 12/14/2022] Open
Abstract
Metal ion homeostasis is fundamental for life. Specifically, transition metals iron, manganese and zinc play a pivotal role in mitochondrial metabolism and energy generation, anti-oxidation defense, transcriptional regulation and the immune response. The misregulation of expression or mutations in ion carriers and the corresponding changes in Mn2+ and Zn2+ levels suggest that these ions play a pivotal role in cancer progression. Moreover, coordinated changes in Mn2+ and Zn2+ ion carriers have been detected, suggesting that particular mechanisms influenced by both ions might be required for the growth of cancer cells, metastasis and immune evasion. Here, we present a review of zinc and manganese pathophysiology suggesting that these ions might cooperatively regulate cancerogenesis. Zn and Mn effects converge on mitochondria-induced apoptosis, transcriptional regulation and the cGAS-STING signaling pathway, mediating the immune response. Both Zn and Mn influence cancer progression and impact treatment efficacy in animal models and clinical trials. We predict that novel strategies targeting the regulation of both Zn and Mn in cancer will complement current therapeutic strategies.
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Affiliation(s)
- Julian Markovich Rozenberg
- Moscow Institute of Physics and Technology, National Research University, 141700 Moscow, Russia; (M.S.); (M.Z.); (E.K.); (K.K.); (A.B.); (N.B.)
- Correspondence:
| | - Margarita Kamynina
- Group of Experimental Biotherapy and Diagnostic, Institute for Regenerative Medicine, I.M. Sechenov First Moscow State Medical University, 119991 Moscow, Russia; (M.K.); (A.G.)
| | - Maksim Sorokin
- Moscow Institute of Physics and Technology, National Research University, 141700 Moscow, Russia; (M.S.); (M.Z.); (E.K.); (K.K.); (A.B.); (N.B.)
- Group of Experimental Biotherapy and Diagnostic, Institute for Regenerative Medicine, I.M. Sechenov First Moscow State Medical University, 119991 Moscow, Russia; (M.K.); (A.G.)
| | - Marianna Zolotovskaia
- Moscow Institute of Physics and Technology, National Research University, 141700 Moscow, Russia; (M.S.); (M.Z.); (E.K.); (K.K.); (A.B.); (N.B.)
- OmicsWay Corporation, Walnut, CA 91789, USA
| | - Elena Koroleva
- Moscow Institute of Physics and Technology, National Research University, 141700 Moscow, Russia; (M.S.); (M.Z.); (E.K.); (K.K.); (A.B.); (N.B.)
| | - Kristina Kremenchutckaya
- Moscow Institute of Physics and Technology, National Research University, 141700 Moscow, Russia; (M.S.); (M.Z.); (E.K.); (K.K.); (A.B.); (N.B.)
| | - Alexander Gudkov
- Group of Experimental Biotherapy and Diagnostic, Institute for Regenerative Medicine, I.M. Sechenov First Moscow State Medical University, 119991 Moscow, Russia; (M.K.); (A.G.)
| | - Anton Buzdin
- Moscow Institute of Physics and Technology, National Research University, 141700 Moscow, Russia; (M.S.); (M.Z.); (E.K.); (K.K.); (A.B.); (N.B.)
- Group of Experimental Biotherapy and Diagnostic, Institute for Regenerative Medicine, I.M. Sechenov First Moscow State Medical University, 119991 Moscow, Russia; (M.K.); (A.G.)
- OmicsWay Corporation, Walnut, CA 91789, USA
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 117997 Moscow, Russia
- Oncobox Ltd., 121205 Moscow, Russia
| | - Nicolas Borisov
- Moscow Institute of Physics and Technology, National Research University, 141700 Moscow, Russia; (M.S.); (M.Z.); (E.K.); (K.K.); (A.B.); (N.B.)
- OmicsWay Corporation, Walnut, CA 91789, USA
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Jana A, Aher A, Brandao P, Sharda S, Bera P, Phadikar U, Manna SK, Mahapatra AK, Bera P. Dissociation of a tripodal pyridyl-pyrazole ligand and assortment of metal complex: Synthesis, structure, DFT, thermal stability, cytotoxicity, DNA cleavage, and molecular docking studies. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.132479] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Pereira SC, Moreira MV, Silva BM, Oliveira PF, Alves MG. Roles of Oxidative Stress in the Male Reproductive System: Potential of Antioxidant Supplementation for Infertility Treatment. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2022; 1391:259-274. [PMID: 36472827 DOI: 10.1007/978-3-031-12966-7_15] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The decline of fertility in modern society is a serious worldwide concern, and the reasons behind it are complex and difficult to unveil. The fact that a big percentage of infertility cases remain diagnosed as idiopathic, turn the strategies to treat such conditions very limited. Nevertheless, one must agree that keeping the oxidative balance of the reproductive tissues should be one of the first lines of treatment for infertile patients. As reported, 30-80% of male infertile individuals present high levels of prooxidant species in the seminal fluid. Thus, antioxidant therapies, which consist of dietary supplementation therapy with one or more antioxidant compound, remain the first step in the treatment of male infertility. Nevertheless, the efficacy of such therapies is variable between individuals. The most common prescribed antioxidants are carnitines and vitamins C and E, but recently phytochemical quercetin has emerged as a potential compound for the treatment of oxidative stress in the male reproductive system. Although there are several animals' evidence about the great potential of quercetin for the treatment of infertility, clinical trials on this subject remain scarce.
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Affiliation(s)
- Sara C Pereira
- Department of Anatomy, UMIB - Unit for Multidisciplinary Research in Biomedicine, Institute of Biomedical Sciences Abel Salazar, University of Porto, Porto, Portugal
- ITR - Laboratory for Integrative and Translational Research in Population Health, University of Porto, Porto, Portugal
- QOPNA & LAQV, Department of Chemistry, University of Aveiro, Aveiro, Portugal
- Department of Pathology, Faculty of Medicine, University of Porto, Porto, Portugal
| | - Mafalda V Moreira
- Department of Anatomy, UMIB - Unit for Multidisciplinary Research in Biomedicine, Institute of Biomedical Sciences Abel Salazar, University of Porto, Porto, Portugal
| | - Branca M Silva
- Department of Medical Sciences, University of Beira Interior, Covilhã, Portugal
| | - Pedro F Oliveira
- QOPNA & LAQV, Department of Chemistry, University of Aveiro, Aveiro, Portugal
| | - Marco G Alves
- Department of Anatomy, UMIB - Unit for Multidisciplinary Research in Biomedicine, Institute of Biomedical Sciences Abel Salazar, University of Porto, Porto, Portugal.
- ITR - Laboratory for Integrative and Translational Research in Population Health, University of Porto, Porto, Portugal.
- Biotechnology of Animal and Human Reproduction (TechnoSperm), Institute of Food and Agricultural Technology, University of Girona, Girona, Spain.
- Unit of Cell Biology, Department of Biology, Faculty of Sciences, University of Girona, Girona, Spain.
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Ahmed M, Lai TH, Kim W, Kim DR. A Functional Network Model of the Metastasis Suppressor PEBP1/RKIP and Its Regulators in Breast Cancer Cells. Cancers (Basel) 2021; 13:6098. [PMID: 34885208 PMCID: PMC8657175 DOI: 10.3390/cancers13236098] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Revised: 11/26/2021] [Accepted: 11/30/2021] [Indexed: 12/12/2022] Open
Abstract
Drug screening strategies focus on quantifying the phenotypic effects of different compounds on biological systems. High-throughput technologies have the potential to understand further the mechanisms by which these drugs produce the desired outcome. Reverse causal reasoning integrates existing biological knowledge and measurements of gene and protein abundances to infer their function. This approach can be employed to appraise the existing biological knowledge and data to prioritize targets for cancer therapies. We applied text mining and a manual literature search to extract known interactions between several metastasis suppressors and their regulators. We then identified the relevant interactions in the breast cancer cell line MCF7 using a knockdown dataset. We finally adopted a reverse causal reasoning approach to evaluate and prioritize pathways that are most consistent and responsive to drugs that inhibit cell growth. We evaluated this model in terms of agreement with the observations under treatment of several drugs that produced growth inhibition of cancer cell lines. In particular, we suggested that the metastasis suppressor PEBP1/RKIP is on the receiving end of two significant regulatory mechanisms. One involves RELA (transcription factor p65) and SNAI1, which were previously reported to inhibit PEBP1. The other involves the estrogen receptor (ESR1), which induces PEBP1 through the kinase NME1. Our model was derived in the specific context of breast cancer, but the observed responses to drug treatments were consistent in other cell lines. We further validated some of the predicted regulatory links in the breast cancer cell line MCF7 experimentally and highlighted the points of uncertainty in our model. To summarize, our model was consistent with the observed changes in activity with drug perturbations. In particular, two pathways, including PEBP1, were highly responsive and would be likely targets for intervention.
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Affiliation(s)
| | | | | | - Deok Ryong Kim
- Department of Biochemistry and Convergence Medical Science, Institute of Health Sciences, Gyeongsang National University College of Medicine, Jinju 527-27, Korea; (M.A.); (T.H.L.); (W.K.)
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Abdel-Aziz N, El-Sonbaty SM, Hegazy MGA. Ameliorative potential of manganese nanoparticles with low-level ionizing radiation against experimentally induced hepatocarcinogenesis. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:65474-65486. [PMID: 34322790 DOI: 10.1007/s11356-021-15571-1] [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: 04/01/2021] [Accepted: 07/16/2021] [Indexed: 06/13/2023]
Abstract
Nanotechnology is a rich field with infinite possibilities of drug designs for cancer treatment. We aimed to biosynthesize manganese nanoparticles (Mn NPs) using Lactobacillus helveticus to investigate its anticancer synergistic effect with low-dose gamma radiation on HCC-induced rats. Diethylnitrosamine (DEN) (20 mg/kg BW, 5 times a week for 6 weeks) induced HCC in rats. Rats received Mn NPs (5 mg/kg BW/day) by gastric gavage over 4 weeks concomitant with single dose of gamma radiation (γ-R) (0.25 Gy). Characterization, cytotoxicity, and anticancer activity of Mn NPs were evaluated. DEN-induced significant liver dysfunction (alanine transaminase activity ALT, total proteins, and albumin levels) associated with significant increase in lipid peroxidation levels with reduction in super oxide dismutase activity. Furthermore, DEN intoxication is sponsored for remarkable increase in levels of Alfa-fetoprotein, tumor necrosis factor α, vascular endothelial growth factor, and transforming growth factor beta with remarkable decrease in caspase 3 and cytochrome c. Treatment with Mn NPs (4.98-11.58 nm) and single dose gamma radiation evoked significant repair in ALT, total protein, and albumin accompanied with balanced oxidative status, diminished inflammatory biomarkers, angiogenic factor, and growth factor with restoration in apoptotic factors. Mn NPs revealed obvious in vitro cytotoxic activity against HepG2 cell line in a dose-dependent manner. Our findings were well appreciated with the histopathological study. In conclusion, a new approach of the single or combined use of Mn NPs with low-dose γ-radiation regimens as promising paradigm for HCC treatment is recommended.
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Affiliation(s)
- Nahed Abdel-Aziz
- Radiation Biology Department, National Center for Radiation Research and Technology, Egyptian Atomic Energy Authority, Cairo, Egypt
| | - Sawsan M El-Sonbaty
- Radiation Microbiology Department, National Center for Radiation Research and Technology, Egyptian Atomic Energy Authority, Cairo, Egypt
| | - Marwa G A Hegazy
- Biochemistry Department, Faculty of Science, Ain Shams University, Cairo, Egypt.
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9
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Manuel AM, Dai Y, Freeman LA, Jia P, Zhao Z. An integrative study of genetic variants with brain tissue expression identifies viral etiology and potential drug targets of multiple sclerosis. Mol Cell Neurosci 2021; 115:103656. [PMID: 34284104 PMCID: PMC8802913 DOI: 10.1016/j.mcn.2021.103656] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2021] [Revised: 07/05/2021] [Accepted: 07/13/2021] [Indexed: 11/18/2022] Open
Abstract
Multiple sclerosis (MS) is a neuroinflammatory disorder leading to chronic disability. Brain lesions in MS commonly arise in normal-appearing white matter (NAWM). Genome-wide association studies (GWAS) have identified genetic variants associated with MS. Transcriptome alterations have been observed in case-control studies of NAWM. We developed a Cross-Dataset Evaluation (CDE) function for our network-based tool, Edge-Weighted Dense Module Search of GWAS (EW_dmGWAS). We applied CDE to integrate publicly available MS GWAS summary statistics of 41,505 cases and controls with collectively 38 NAWM expression samples, using the human protein interactome as the reference network, to investigate biological underpinnings of MS etiology. We validated the resulting modules with colocalization of GWAS and expression quantitative trait loci (eQTL) signals, using GTEx Consortium expression data for MS-relevant tissues: 14 brain tissues and 4 immune-related tissues. Other network assessments included a drug target query and functional gene set enrichment analysis. CDE prioritized a MS NAWM network containing 55 unique genes. The gene list was enriched (p-value = 2.34 × 10-7) with GWAS-eQTL colocalized genes: CDK4, IFITM3, MAPK1, MAPK3, METTL12B and PIK3R2. The resultant network also included drug signatures of FDA-approved medications. Gene set enrichment analysis revealed the top functional term "intracellular transport of virus", among other viral pathways. We prioritize critical genes from the resultant network: CDK4, IFITM3, MAPK1, MAPK3, METTL12B and PIK3R2. Enriched drug signatures suggest potential drug targets and drug repositioning strategies for MS. Finally, we propose mechanisms of potential MS viral onset, based on prioritized gene set and functional enrichment analysis.
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Affiliation(s)
- Astrid M Manuel
- Center for Precision Health, School of Biomedical Informatics, The University of Texas Health Science Center at Houston, Houston, TX 77030, USA.
| | - Yulin Dai
- Center for Precision Health, School of Biomedical Informatics, The University of Texas Health Science Center at Houston, Houston, TX 77030, USA.
| | - Leorah A Freeman
- Department of Neurology, Dell Medical School, The University of Texas at Austin, Austin, TX 78712, USA.
| | - Peilin Jia
- Center for Precision Health, School of Biomedical Informatics, The University of Texas Health Science Center at Houston, Houston, TX 77030, USA.
| | - Zhongming Zhao
- Center for Precision Health, School of Biomedical Informatics, The University of Texas Health Science Center at Houston, Houston, TX 77030, USA; Human Genetics Center, School of Public Health, The University of Texas Health Science Center at Houston, Houston, TX 77030, USA; Department of Biomedical Informatics, Vanderbilt University Medical Center, Nashville, TN 37203, USA.
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PdpaMn inhibits fatty acid synthase-mediated glycolysis by down-regulating PI3K/Akt signaling pathway in breast cancer. Anticancer Drugs 2021; 31:1046-1056. [PMID: 32649369 DOI: 10.1097/cad.0000000000000968] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Novel manganese complex, PdpaMn ([(Pdpa)MnCl2]), was developed to induce apoptosis in breast cancer cells. The impact of phosphoinositide-(3)-kinase pathway onto fatty acid synthase (FASN) has an effect on cellular metabolism in breast cancer. However, reverse actions from FASN towards PI3K/Akt are still indefinable. Perhaps, loss of FASN could regulate glycolysis. Previously we established that PdpaMn inhibits FASN and involve in mitochondrial function. This study investigated the activity of PdpaMn on glycolysis and its mechanism. PdpaMn was used to suppress FASN expression in tumor. Expression of ATP and lactic acid level was measured to investigate the glycolysis variance in cells and animals. MCF-7 and 4T1 cells were treated with G28UCM, an inhibitor of FASN and PdpaMn, western blotting to detect PI3K/Akt signaling pathway. The capacity of proliferation was investigated by western blotting and immunohistochemistry. PdpaMn selectively inhibits cancer cells and tumor growth but also block FASN expression and suppresses the content of free fatty acid. Lactate dehydrogenase (LDHA) protein level was down-regulated as G28UCM and PdpaMn inhibited FASN, glucose transporter (Glut1), and pyruvate kinase (PKM2) proteins level were not affected. PI3K, p-Akt in the experimental group evidently declined compared to the control group. Proliferation was suppressed in FASN-arbitrated glycolysis. Our study supports the hypothesis that loss of FASN by PdpaMn suppressed glycolysis via down-regulating PI3K/Akt signaling pathway revealing the direct link between FASN and glycolysis. The results have paved the way to unravel the mechanisms of FASN and mitochondrial will be useful for designing novel co-targeting strategies for breast cancer.
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Evaluation of the antitumor activity of a series of the pincer-type metallocomplexes produced from isonicotinohydrazide derivative. J Inorg Biochem 2021; 223:111525. [PMID: 34237626 DOI: 10.1016/j.jinorgbio.2021.111525] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2021] [Revised: 06/18/2021] [Accepted: 06/25/2021] [Indexed: 01/30/2023]
Abstract
In this work we report on the antitumor properties of a series of pincer-type metallocomplexes [Hg2(HL-keto)Cl4]n (1), [Hg(HL-keto)I2] (2) and [Mn(HL-zwitterion)Cl2]∙MeOH (3∙MeOH), derived from N'-(1-(pyridin-2-yl)ethylidene)isonicotinohydrazide (HL) and corresponding metal salts. The Hg(II) and Mn(II) salts are chelated by the keto (HL-keto) or zwitterionic (HL-zwitterion) form of HL, respectively. The cytotoxic effects of these compounds have been accessed against lung adenocarcinoma (A549) and hepatocellular carcinoma (HepG2 and Huh7) cell lines. Complexes 1 and 2 were found to be most efficient against the cell line Huh7 with IC50 value of 2.56 and 9.90 μM, respectively, while they exhibit moderate activity towards cell lines A549 and HepG2, as evidenced from IC50 values in the range 27.98-56.99 μM. Complex 3∙MeOH is less efficient towards all the three cell lines with relatively high IC50 values. The mechanisms of the metallocomplexes killing the aforementioned cells were elucidated by flow cytometry, colony formation and polymerase chain reaction (PCR) analysis of apoptosis related expression of the genes. The results of the cytotoxic effects and antitumor activity on different cell lines are affected by the metal nature and the presence of the coordinated halide.
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Du Y, Taylor CG, Aukema HM, Zahradka P. Regulation of docosahexaenoic acid-induced apoptosis of confluent endothelial cells: Contributions of MAPKs and caspases. Biochim Biophys Acta Mol Cell Biol Lipids 2021; 1866:158902. [PMID: 33578050 DOI: 10.1016/j.bbalip.2021.158902] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2020] [Revised: 12/20/2020] [Accepted: 02/06/2021] [Indexed: 12/11/2022]
Abstract
Endothelial cells, which help to maintain vascular homeostasis, can be functionally modulated by polyunsaturated fatty acids. Previously, we reported that docosahexaenoic acid (DHA) reduced the viability of confluent EA.hy926 endothelial cells with caspase-3 activation. This study therefore examined the molecular mechanism by which DHA affects the viability of confluent cells, with a focus on the interaction between caspase-9, caspase-8, caspase-3, p38 mitogen-activated protein kinase (MAPK) and c-Jun N-terminal kinase (JNK) by Western blotting. Our results revealed that DHA induces apoptosis of confluent cells through both intrinsic and extrinsic pathways, which requires activation of p38 MAPK, and involves activation of JNK, caspase-9, caspase-8 and caspase-3 with the exception that cleavage of caspase-8 was incomplete and truncated BID was not detected at the maximum time (8 h) examined. Apoptosis induced by high levels of DHA in healthy endothelial cells is achieved through positive feedback loops linking these MAPKs to multiple caspases, as well as negative feedback from p38 MAPK to JNK. However, only p38 MAPK is crucial in apoptosis induction in comparison with JNK or any other caspase examined. This study has expanded the knowledge on the molecular mechanism of DHA-induced apoptosis in human endothelial cells and has also implied the differential roles of MAP kinases and caspases in apoptosis.
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Affiliation(s)
- Youjia Du
- Department of Physiology & Pathophysiology, University of Manitoba, Winnipeg, Manitoba, Canada; Canadian Centre for Agri-Food Research in Health and Medicine, St. Boniface Hospital Albrechtsen Research Centre, Winnipeg, Manitoba, Canada
| | - Carla G Taylor
- Department of Physiology & Pathophysiology, University of Manitoba, Winnipeg, Manitoba, Canada; Department of Food and Human Nutritional Sciences, University of Manitoba, Winnipeg, Manitoba, Canada; Canadian Centre for Agri-Food Research in Health and Medicine, St. Boniface Hospital Albrechtsen Research Centre, Winnipeg, Manitoba, Canada
| | - Harold M Aukema
- Department of Food and Human Nutritional Sciences, University of Manitoba, Winnipeg, Manitoba, Canada; Canadian Centre for Agri-Food Research in Health and Medicine, St. Boniface Hospital Albrechtsen Research Centre, Winnipeg, Manitoba, Canada
| | - Peter Zahradka
- Department of Physiology & Pathophysiology, University of Manitoba, Winnipeg, Manitoba, Canada; Department of Food and Human Nutritional Sciences, University of Manitoba, Winnipeg, Manitoba, Canada; Canadian Centre for Agri-Food Research in Health and Medicine, St. Boniface Hospital Albrechtsen Research Centre, Winnipeg, Manitoba, Canada.
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13
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He Q, Liu H, Deng S, Chen X, Li D, Jiang X, Zeng W, Lu W. The Golgi Apparatus May Be a Potential Therapeutic Target for Apoptosis-Related Neurological Diseases. Front Cell Dev Biol 2020; 8:830. [PMID: 33015040 PMCID: PMC7493689 DOI: 10.3389/fcell.2020.00830] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2020] [Accepted: 08/04/2020] [Indexed: 01/04/2023] Open
Abstract
Increasing evidence shows that, in addition to the classical function of protein processing and transport, the Golgi apparatus (GA) is also involved in apoptosis, one of the most common forms of cell death. The structure and the function of the GA is damaged during apoptosis. However, the specific effect of the GA on the apoptosis process is unclear; it may be involved in initiating or promoting apoptosis, or it may inhibit apoptosis. Golgi-related apoptosis is associated with a variety of neurological diseases including glioma, Alzheimer’s disease (AD), Parkinson’s disease (PD), and ischemic stroke. This review summarizes the changes and the possible mechanisms of Golgi structure and function during apoptosis. In addition, we also explore the possible mechanisms by which the GA regulates apoptosis and summarize the potential relationship between the Golgi and certain neurological diseases from the perspective of apoptosis. Elucidation of the interaction between the GA and apoptosis broadens our understanding of the pathological mechanisms of neurological diseases and provides new research directions for the treatment of these diseases. Therefore, we propose that the GA may be a potential therapeutic target for apoptosis-related neurological diseases.
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Affiliation(s)
- Qiang He
- Department of Neurology, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Hui Liu
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, China
| | - Shuwen Deng
- Department of Neurology, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Xiqian Chen
- Department of Neurology, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Dong Li
- State Key Laboratory of Virology, CAS Center for Excellence in Brain Science and Intelligence Technology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, China
| | - Xuan Jiang
- State Key Laboratory of Virology, CAS Center for Excellence in Brain Science and Intelligence Technology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, China
| | - Wenbo Zeng
- State Key Laboratory of Virology, CAS Center for Excellence in Brain Science and Intelligence Technology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, China
| | - Wei Lu
- Department of Neurology, The Second Xiangya Hospital, Central South University, Changsha, China
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Wu CW, Tessier SN, Storey KB. Dehydration stress alters the mitogen-activated-protein kinase signaling and chaperone stress response in Xenopus laevis. Comp Biochem Physiol B Biochem Mol Biol 2020; 246-247:110461. [PMID: 32497588 DOI: 10.1016/j.cbpb.2020.110461] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Revised: 05/20/2020] [Accepted: 05/29/2020] [Indexed: 10/24/2022]
Abstract
In arid conditions, the African Clawed frog Xenopus laevis enters a state of estivation dormancy as an adaptive survival strategy. Under estivation, X. laevis experience severe dehydration stress as 25-35% of total body water is lost. Dehydration in X. laevis can lead to periods of hypoxia due to elevated blood viscosity that impedes tissue perfusion. To understand how X. laevis survives under such stress, we studied the regulation pattern of key mitogen-activated protein kinases (MAPK) and their downstream transcription factors, along with several heat shock proteins in the oxygen sensitive brain and heart tissue of X. laevis under dehydration stress. Our study revealed that the activation phosphorylation residues of MAPK including JNK and MSK and their downstream transcription factors c-Jun and ATF2 are significantly decreased in the heart under dehydration. Given that JNK, c-Jun, and ATF2 are known positive regulators of apoptosis, this regulatory pattern suggest that a state of pro-survival signals may be established in the dehydrated heart. In support of this, protein levels of HSP60, a pro-apoptotic mitochondrial chaperone, was also downregulated in the heart in response to dehydration stress. In the brain tissue, most proteins remain unchanged with the exception of the apoptosis regulating p53 transcription factor, which showed a significant decrease in its activating phosphorylation residue under dehydration. Overall, our study revealed that in the Xenopus brain and heart, a specific suppression pattern of MAPK, transcription factors, and HSP takes place to potentially establish a state of pro-survival under dehydration stress.
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Affiliation(s)
- Cheng-Wei Wu
- Department of Veterinary Biomedical Sciences, Western College of Veterinary Medicine, 52 Campus Drive, University of Saskatchewan, SK S7N 5B4, Canada; Toxicology Centre, University of Saskatchewan, Saskatoon, SK S7N 5B3, Canada
| | - Shannon N Tessier
- BioMEMS Resource Center & Center for Engineering in Medicine, Massachusetts General Hospital & Harvard Medical School, 114 16th Street, Charlestown, MA 02129, USA
| | - Kenneth B Storey
- Institute of Biochemistry and Department of Biology, Carleton University, 1125 Colonel By Drive, Ottawa K1S 5B6, Canada.
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15
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Hernroth B, Tassidis H, Baden SP. Immunosuppression of aquatic organisms exposed to elevated levels of manganese: From global to molecular perspective. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2020; 104:103536. [PMID: 31705914 DOI: 10.1016/j.dci.2019.103536] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Accepted: 11/03/2019] [Indexed: 06/10/2023]
Abstract
Manganese (Mn) is an essential trace metal for all organisms. However, in excess it causes toxic effects but the impact on aquatic environments has so far been highly overlooked. Manganese is abundant both in costal and deep sea sediments and becomes bioavailable (Mn2+) during redox conditions. This is an increasing phenomenon due to eutrophication-induced hypoxia and aggravated through the ongoing climate change. Intracellular accumulation of Mn2+ causes oxidative stress and activates evolutionary conserved pathways inducing apoptosis and cell cycle arrest. Here, studies are compiled on how excess of dissolved Mn suppresses the immune system of various aquatic organisms by adversely affecting both renewal of immunocytes and their functionality, such as phagocytosis and activation of pro-phenoloxidase. These impairments decrease the animal's bacteriostatic capacity, indicating higher susceptibility to infections. Increased distribution of pathogens, which is believed to accompany climate change, requires preserved immune sentinel functions and Mn can be crucial for the outcome of host-pathogen interactions.
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Affiliation(s)
- Bodil Hernroth
- Department of Natural Science, Kristianstad University, SE-291 88, Kristianstad, Sweden; The Royal Swedish Academy of Sciences, Kristineberg Marine Research Station, SE-450 34, Fiskebäckskil, Sweden.
| | - Helena Tassidis
- Department of Natural Science, Kristianstad University, SE-291 88, Kristianstad, Sweden
| | - Susanne P Baden
- Department of Biological and Environmental Sciences, University of Gothenburg, Kristineberg Marine Research Station, SE-45034, Fiskebäckskil, Sweden
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Dutta D, Sharma P, Frontera A, Gogoi A, Verma AK, Dutta D, Sarma B, Bhattacharyya MK. Oxalato bridged coordination polymer of manganese( iii) involving unconventional O⋯π-hole(nitrile) and antiparallel nitrile⋯nitrile contacts: antiproliferative evaluation and theoretical studies. NEW J CHEM 2020. [DOI: 10.1039/d0nj03712e] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Unconventional O⋯π-hole(nitrile) and antiparallel nitrile⋯nitrile contacts have been theoretically investigated for a Mn(iii) coordination polymer considering cytotoxicity, apoptosis, ROS generation, molecular docking and pharmacophore features.
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Affiliation(s)
- Debajit Dutta
- Department of Chemistry
- Cotton University
- Guwahati-781001
- India
| | - Pranay Sharma
- Department of Chemistry
- Cotton University
- Guwahati-781001
- India
| | - Antonio Frontera
- Departament de Química
- Universitat de les Illes Balears
- 07122 Palma de Mallorca (Baleares)
- Spain
| | - Anshuman Gogoi
- Department of Chemistry
- Cotton University
- Guwahati-781001
- India
| | - Akalesh K. Verma
- Department of Zoology
- Cell & Biochemical Technology Laboratory
- Cotton University
- Guwahati 781001
- India
| | - Diksha Dutta
- Department of Zoology
- Cell & Biochemical Technology Laboratory
- Cotton University
- Guwahati 781001
- India
| | - Bipul Sarma
- Department of Chemical Sciences
- Tezpur University
- Tezpur 784028
- India
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El-Shwiniy WH, Shehab WS, Zordok WA. Spectral, thermal, DFT calculations, anticancer and antimicrobial studies for bivalent manganese complexes of pyrano [2,3-d]pyrimidine derivatives. J Mol Struct 2020. [DOI: 10.1016/j.molstruc.2019.126993] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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18
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Mirnamniha M, Faroughi F, Tahmasbpour E, Ebrahimi P, Beigi Harchegani A. An overview on role of some trace elements in human reproductive health, sperm function and fertilization process. REVIEWS ON ENVIRONMENTAL HEALTH 2019; 34:339-348. [PMID: 31203261 DOI: 10.1515/reveh-2019-0008] [Citation(s) in RCA: 74] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Accepted: 04/28/2019] [Indexed: 05/28/2023]
Abstract
Human semen contains several trace elements such as calcium (Ca), copper (Cu), manganese (Mn), magnesium (Mg), zinc (Zn) and selenium (Se) which are necessary for reproductive health, normal spermatogenesis, sperm maturation, motility and capacitation, as well as normal sperm function. In this review, the potential role of these trace elements in male reproductive health, normal function of spermatozoa and fertility potency were considered. We selected and reviewed articles that considered crucial roles of trace elements in human sperm function and fertility. Ca is essential for sperm motility and its hyperactivation, sperm capacitation and acrosome reaction, as well as sperm chemotaxis. Sodium (Na) and potassium (K) are involved in sperm motility and capacitation. Mg is necessary for normal ejaculation, spermatogenesis and sperm motility. Zn is one of the most significant nutrients in human semen. Seminal deficiency of Zn can be associated with delayed testicular development, impaired spermatogenesis, deficiency of sex hormones, oxidative stress and inflammation, and apoptosis. Se is another significant element which has antioxidative properties and is essential for spermatogenesis and the maintenance of male fertility. Mn is a potent stimulator for sperm motility; however, increased level of seminal plasma Se can be toxic for sperm. Like Se, Cu has antioxidative properties and has a positive effect on sperm parameters. Decreased level of these trace elements can negatively affect human reproductive health, semen quality, sperm normal function and as the result, fertility potency in men. Measurement of these trace elements in men with idiopathic infertility is necessary.
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Affiliation(s)
- Mahdiyeh Mirnamniha
- Department of Medical Radiation Engineering, Central Tehran Branch, Islamic Azad University, Tehran, Iran
| | - Fereshteh Faroughi
- Department of Medical Radiation Engineering, Central Tehran Branch, Islamic Azad University, Tehran, Iran
| | - Eisa Tahmasbpour
- Laboratory of Regenerative Medicine and Biomedical Innovations, Pasteur Institute of Iran, Tehran, Iran
| | - Pirooz Ebrahimi
- University Scientific Education and Research Network, Tehran, Iran
| | - Asghar Beigi Harchegani
- Department of Medical Genetics, Faculty of Medicine, Shahid Beheshti University of Medical Sciences, P.O. Box: 19945-581, Tehran, Iran
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Abstract
Metals are essential components in all forms of life required for the function of nearly half of all enzymes and are critically involved in virtually all fundamental biological processes. Especially, the transition metals iron (Fe), zinc (Zn), manganese (Mn), nickel (Ni), copper (Cu) and cobalt (Co) are crucial micronutrients known to play vital roles in metabolism as well due to their unique redox properties. Metals carry out three major functions within metalloproteins: to provide structural support, to serve as enzymatic cofactors, and to mediate electron transportation. Metal ions are also involved in the immune system from metal allergies to nutritional immunity. Within the past decade, much attention has been drawn to the roles of metal ions in the immune system, since increasing evidence has mounted to suggest that metals are critically implicated in regulating both the innate immune sensing of and the host defense against invading pathogens. The importance of ions in immunity is also evidenced by the identification of various immunodeficiencies in patients with mutations in ion channels and transporters. In addition, cancer immunotherapy has recently been conclusively demonstrated to be effective and important for future tumor treatment, although only a small percentage of cancer patients respond to immunotherapy because of inadequate immune activation. Importantly, metal ion-activated immunotherapy is becoming an effective and potential way in tumor therapy for better clinical application. Nevertheless, we are still in a primary stage of discovering the diverse immunological functions of ions and mechanistically understanding the roles of these ions in immune regulation. This review summarizes recent advances in the understanding of metal-controlled immunity. Particular emphasis is put on the mechanisms of innate immune stimulation and T cell activation by the essential metal ions like calcium (Ca2+), zinc (Zn2+), manganese (Mn2+), iron (Fe2+/Fe3+), and potassium (K+), followed by a few unessential metals, in order to draw a general diagram of metalloimmunology.
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Affiliation(s)
- Chenguang Wang
- Key Laboratory of Cell Proliferation and Differentiation of the Ministry of Education, School of Life Sciences, Peking University, Beijing, China; Peking-Tsinghua Center for Life Sciences, Peking University, Beijing, China
| | - Rui Zhang
- Key Laboratory of Cell Proliferation and Differentiation of the Ministry of Education, School of Life Sciences, Peking University, Beijing, China; Peking-Tsinghua Center for Life Sciences, Peking University, Beijing, China
| | - Xiaoming Wei
- Key Laboratory of Cell Proliferation and Differentiation of the Ministry of Education, School of Life Sciences, Peking University, Beijing, China; Peking-Tsinghua Center for Life Sciences, Peking University, Beijing, China
| | - Mengze Lv
- Key Laboratory of Cell Proliferation and Differentiation of the Ministry of Education, School of Life Sciences, Peking University, Beijing, China; Peking-Tsinghua Center for Life Sciences, Peking University, Beijing, China
| | - Zhengfan Jiang
- Key Laboratory of Cell Proliferation and Differentiation of the Ministry of Education, School of Life Sciences, Peking University, Beijing, China; Peking-Tsinghua Center for Life Sciences, Peking University, Beijing, China.
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20
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Roy G, Guan S, Liu H, Zhang L. Rotundic Acid Induces DNA Damage and Cell Death in Hepatocellular Carcinoma Through AKT/mTOR and MAPK Pathways. Front Oncol 2019; 9:545. [PMID: 31293977 PMCID: PMC6606729 DOI: 10.3389/fonc.2019.00545] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Accepted: 06/04/2019] [Indexed: 12/24/2022] Open
Abstract
Hepatocellular carcinoma (HCC) is the fourth largest cause of cancer-related deaths worldwide with limited therapeutic interventions. Renewed interest in natural products as drug leads has resulted in a paradigm shift toward the rapid screening of medicinal plants for the discovery of new chemical entities. Rotundic acid (RA), a plant-derived triterpenoid, has been anecdotally reported to possess anti-inflammatory and cardio-protective abilities. The present study highlights the anti-cancer efficacy of RA on HCC in vitro and in vivo. The inhibitory effects of RA on HCC cell viability was determined by MTT. Soft agar colony formation and clonogenic assays also showed that RA inhibited HCC cell proliferation. Flow cytometry, confocal, and western blot results further indicated that RA induced cell cycle arrest, DNA damage, and apoptosis by modulating the AKT/mTOR and MAPK pathways. Besides the suppression of migration and invasion, tube formation and VEGF-ELISA revealed the anti-angiogenic abilities of RA on HCC. Moreover, RA also inhibited tumor growth in a HepG2 xenograft mouse model. To our best knowledge, this is the first extensive study of the anticancer activity of RA on HCC. The results demonstrate that RA could be a potential drug candidate for HCC treatment.
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Affiliation(s)
- Gaurab Roy
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou, China
| | - Su Guan
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou, China
| | - Hexiang Liu
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou, China
| | - Lei Zhang
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou, China.,Guangdong Provincial Engineering and Technological Centre for Biopharmaceuticals, South China University of Technology, Guangzhou, China
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Inhibition of MSK1 Promotes Inflammation and Apoptosis and Inhibits Functional Recovery After Spinal Cord Injury. J Mol Neurosci 2019; 68:191-203. [PMID: 30919247 PMCID: PMC6511344 DOI: 10.1007/s12031-019-01298-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2019] [Accepted: 03/12/2019] [Indexed: 12/21/2022]
Abstract
Mitogen- and stress-activated kinase (MSK) 1 is a nuclear serine/threonine kinase. In the central nervous system, it plays an important role in regulating cell proliferation and neuronal survival; it is also involved in astrocyte inflammation and the inhibition of inflammatory cytokine production. However, its specific role in spinal cord injury is not clear. Here, we aimed to elucidate this role using an in vivo animal model. In this study, we found that MSK1 is gradually decreased, starting 1 day after spinal cord injury and to its lowest level 3 days post-injury, after which it gradually increased. To further investigate the possible function of MSK1 in spinal cord injury, we interfered with its expression by utilizing a small interfering RNA (siRNA)-encoding lentivirus, which was injected into the injured spinal cord to inhibit local expression. After MSK1 inhibition, we found that the expression of tumor necrosis factor (TNF)-α, interleukin (IL)-6, and IL-1β were increased. Moreover, the expression of IL-10 was decreased. In addition, neuronal apoptotic cells were increased significantly and expression of the apoptosis-related protein caspase-3 was also increased. Ultrastructural analysis of nerve cells also revealed typical neuronal apoptosis and severe neuronal damage. Finally, we found that hindlimb motor function decreased significantly with MSK1 knockdown. Therefore, our findings suggest that the inhibition of this protein promotes inflammatory responses and apoptosis and suppresses functional recovery after spinal cord injury. MSK1 might thus play an important role in repair after spinal cord injury by regulating inflammation and apoptosis.
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Activator protein-1 and caspase 8 mediate p38α MAPK-dependent cardiomyocyte apoptosis induced by palmitic acid. Apoptosis 2019; 24:395-403. [DOI: 10.1007/s10495-018-01510-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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23
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Jankowski J, Ognik K, Stępniowska A, Zduńczyk Z, Kozłowski K. The effect of the source and dose of manganese on the performance, digestibility and distribution of selected minerals, redox, and immune status of turkeys. Poult Sci 2019; 98:1379-1389. [PMID: 30265350 DOI: 10.3382/ps/pey467] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2018] [Accepted: 09/07/2018] [Indexed: 12/29/2022] Open
Abstract
The aim of this study was to determine the effect of various levels of manganese added to the diet of growing turkeys in the conventional form of MnO or in the form of NP-Mn2O3 nanoparticles on growth performance, absorption, and accumulation of Mn, Zn, and Cu, and antioxidant and immune status. The experiment was conducted on 1080 one-day-old Hybrid Converter turkeys randomly assigned to 6 groups with 10 replications, in a two-factor design with three dosages of manganese - 100, 50, and 10 mg/kg, and two sources-manganese oxide (MnO) and manganese nanoparticles (NP-Mn2O3). Neither reducing the addition of Mn from 100 to 50 or even 10 mg/kg of the diet nor replacing MnO with NP-Mn2O3 had a negative effect on the growth performance of the turkeys. Replacing MnO with NP-Mn2O3 in the turkey diet improved ileal digestibility of Mn and decreased accumulation of Cu in the liver and breast muscle. The study showed that irrespective of the form used, reducing the level of Mn supplementation of the diet from the 100 mg/kg recommended by British United Turkey to 50 or 10 mg/kg decreased its ileal digestibility and increased its accumulation in the liver, breast muscle, and skin. Reducing the addition of Mn to the turkey diet increased intestinal absorption of Zn and reduced accumulation of Zn and Cu in the liver, breast muscle, and skin. It did not increase oxidation processes in the liver or breast muscle of the turkeys. Reducing the addition of Mn to the turkey diet stimulated the immune system, which was manifested by stimulation of B cells to produce immunoglobulin M and by the release of the cytokine IL-6, but did not intensify apoptosis. The results of the study indicate that the recommended manganese supplement in turkey diets can be reduced. The use of manganese nanoparticles in turkey feeding requires further study.
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Affiliation(s)
- Jan Jankowski
- Department of Poultry Science, Faculty of Animal Bioengineering, University of Warmia and Mazury Oczapowskiego 5, 10-719 Olsztyn, Poland
| | - Katarzyna Ognik
- Department of Biochemistry and Toxicology, Faculty of Biology, Animal Sciences and Bioeconomy, University of Life Sciences in Lublin, Akademicka 13, 20-950 Lublin, Poland
| | - Anna Stępniowska
- Department of Biochemistry and Toxicology, Faculty of Biology, Animal Sciences and Bioeconomy, University of Life Sciences in Lublin, Akademicka 13, 20-950 Lublin, Poland
| | - Zenon Zduńczyk
- Institute of Animal Reproduction and Food Research of the Polish Academy of Sciences. Tuwima 10, 10-748 Olsztyn, Poland
| | - Krzysztof Kozłowski
- Department of Poultry Science, Faculty of Animal Bioengineering, University of Warmia and Mazury Oczapowskiego 5, 10-719 Olsztyn, Poland
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Glucuronorhamnoxylan from Capsosiphon fulvescens inhibits the growth of HT-29 human colon cancer cells in vitro and in vivo via induction of apoptotic cell death. Int J Biol Macromol 2019; 124:1060-1068. [DOI: 10.1016/j.ijbiomac.2018.12.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Revised: 11/27/2018] [Accepted: 12/01/2018] [Indexed: 12/16/2022]
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25
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Gong P, Jiang R, Yao J, Yao Q, Xu X, Chen J, Shen J, Shi W. Novel Insights into MSK1 Phosphorylation by MRKβ in Intracerebral Hemorrhage-Induced Neuronal Apoptosis. Cell Transplant 2019; 28:783-795. [PMID: 30744416 PMCID: PMC6686428 DOI: 10.1177/0963689719829073] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
Neuronal apoptosis is regarded as one of the most important pathophysiological changes of intracerebral hemorrhagic (ICH) stroke—a major public health problem that leads to high mortality rates and functional dependency. Mitogen-and stress-activated kinase (MSK) 1 is implicated in various biological functions in different cell types, including proliferation, tumorigenesis and responses to stress. Our previous study showed that MSK1 phosphorylation (p-MSK1) is related to the regulation of LPS-induced astrocytic inflammation, and possibly acts as a negative regulator of inflammation. In this study, we identified a specific interaction between MSK1 and MRKβ (MLK-related kinase)—a member of the MAPK pathway—during neuronal apoptosis. In an ICH rat model, western blotting and immunohistochemical analysis revealed that both MRKβ and phosphorylation of MSK1 (p-MSK1 Ser376) were significantly upregulated in cells surrounding the hematoma. Triple-immunofluorescent labeling demonstrated the co-localization of MRKβ and p-MSK1 in neurons, but not astrocytes. Furthermore, MRKβ was partially transported into the nucleus, and interacted with p-MSK1 in hemin-treated neurons. Immunoprecipitation showed that MRKβ and p-MSK1 exhibited an enhanced interaction during the pathophysiology process. Utilizing small interfering RNAs to knockdown MRKβ or MSK1, we verified that MSK1 Ser376 is a phosphorylation site targeted by MRKβ. We also observed that the phosphorylation of NF-κB p65 at Ser276 was mediated by the MRKβ-p-MSK1 complex. Furthermore, it was found that the neuronal apoptosis marker, active caspase-3, was co-localized with MRKβ and p-MSK1. In addition, flow cytometry analysis revealed that knockdown of MRKβ or MSK1 specifically resulted in increased neuronal apoptosis, which suggested that the MRKβ-p-MSK1 complex might exert a neuroprotective function against ICH-induced neuronal apoptosis. Taken together, our data suggest that MRKβ translocated into the nucleus and phosphorylated MSK1 to protect neurons via phosphorylation of p65—a subunit of nuclear factor κB.
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Affiliation(s)
- Peipei Gong
- * These authors contributed equally to this work
| | - Rui Jiang
- * These authors contributed equally to this work
| | - Junzhong Yao
- 1 Department of Neurosurgery, Comprehensive Surgical Laboratory, Affiliated Hospital of Nantong University, P.R. China
| | - Qi Yao
- 1 Department of Neurosurgery, Comprehensive Surgical Laboratory, Affiliated Hospital of Nantong University, P.R. China
| | - Xide Xu
- 1 Department of Neurosurgery, Comprehensive Surgical Laboratory, Affiliated Hospital of Nantong University, P.R. China
| | - Jian Chen
- 1 Department of Neurosurgery, Comprehensive Surgical Laboratory, Affiliated Hospital of Nantong University, P.R. China
| | - Jianhong Shen
- 1 Department of Neurosurgery, Comprehensive Surgical Laboratory, Affiliated Hospital of Nantong University, P.R. China
| | - Wei Shi
- 1 Department of Neurosurgery, Comprehensive Surgical Laboratory, Affiliated Hospital of Nantong University, P.R. China
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Kim J, Pajarillo E, Rizor A, Son DS, Lee J, Aschner M, Lee E. LRRK2 kinase plays a critical role in manganese-induced inflammation and apoptosis in microglia. PLoS One 2019; 14:e0210248. [PMID: 30645642 PMCID: PMC6333340 DOI: 10.1371/journal.pone.0210248] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2018] [Accepted: 12/19/2018] [Indexed: 12/11/2022] Open
Abstract
Long-term exposure to elevated levels of manganese (Mn) causes manganism, a neurodegenerative disorder with Parkinson's disease (PD)-like symptoms. Increasing evidence suggests that leucine-rich repeat kinase 2 (LRRK2), which is highly expressed in microglia and macrophages, contributes to the inflammation and neurotoxicity seen in autosomal dominant and sporadic PD. As gene-environment interactions have emerged as important modulators of PD-associated toxicity, LRRK2 may also mediate Mn-induced inflammation and pathogenesis. In this study, we investigated the role of LRRK2 in Mn-induced toxicity using human microglial cells (HMC3), LRRK2-wild-type (WT) and LRRK2-knockout (KO) RAW264.7 macrophage cells. Results showed that Mn activated LRRK2 kinase by phosphorylation of its serine residue at the 1292 position (S1292) as a marker of its kinase activity in macrophage and microglia, while inhibition with GSK2578215A (GSK) and MLi-2 abolished Mn-induced LRRK2 activation. LRRK2 deletion and its pharmacological inhibition attenuated Mn-induced apoptosis in macrophages and microglia, along with concomitant decreases in the pro-apoptotic Bcl-2-associated X (Bax) protein. LRRK2 deletion also attenuated Mn-induced production of reactive oxygen species (ROS) and the pro-inflammatory cytokine TNF-α. Mn-induced phosphorylation of mitogen-activated protein kinase (MAPK) p38 and ERK signaling proteins was significantly attenuated in LRRK2 KO cells and GSK-treated cells. Moreover, inhibition of MAPK p38 and ERK as well as LRRK2 attenuated Mn-induced oxidative stress and cytotoxicity. These findings suggest that LRRK2 kinase activity plays a critical role in Mn-induced toxicity via downstream activation of MAPK signaling in macrophage and microglia. Collectively, these results suggest that LRRK2 could be a potential molecular target for developing therapeutics to treat Mn-related neurodegenerative disorders.
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Affiliation(s)
- Judong Kim
- Department of Pharmaceutical Sciences, College of Pharmacy, Florida A&M University, Tallahassee, Florida, United States of America
| | - Edward Pajarillo
- Department of Pharmaceutical Sciences, College of Pharmacy, Florida A&M University, Tallahassee, Florida, United States of America
| | - Asha Rizor
- Department of Pharmaceutical Sciences, College of Pharmacy, Florida A&M University, Tallahassee, Florida, United States of America
| | - Deok-Soo Son
- Department of Biochemistry and Cancer Biology, Meharry Medical College, Nashville, Tennessee, United States of America
| | - Jayden Lee
- Department of Speech, Language & Hearing Sciences, Boston University, Boston, Massachusetts, United States of America
| | - Michael Aschner
- Department of Molecular Pharmacology, Albert Einstein College of Medicine, Bronx, New York, United States of America
| | - Eunsook Lee
- Department of Pharmaceutical Sciences, College of Pharmacy, Florida A&M University, Tallahassee, Florida, United States of America
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Zhu M, Liu J, Su J, Meng B, Feng Y, Jia B, Peng T, Qi Z, Gao E. Two Mn II
, Cu II
complexes derived from 3,5-bis(1-imidazoly) pyridine: Synthesis, DNA binding, Molecular docking and cytotoxicity studies. Appl Organomet Chem 2019. [DOI: 10.1002/aoc.4676] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Mingchang Zhu
- The key Laboratory of the Inorganic Molecule-Based Chemistry of Liaoning Province and Laboratory of Coordination Chemistry; Shenyang University of Chemical Technology; Shenyang 110142 China
| | - Jiaxing Liu
- The key Laboratory of the Inorganic Molecule-Based Chemistry of Liaoning Province and Laboratory of Coordination Chemistry; Shenyang University of Chemical Technology; Shenyang 110142 China
| | - Junqi Su
- The key Laboratory of the Inorganic Molecule-Based Chemistry of Liaoning Province and Laboratory of Coordination Chemistry; Shenyang University of Chemical Technology; Shenyang 110142 China
| | - Bo Meng
- The key Laboratory of the Inorganic Molecule-Based Chemistry of Liaoning Province and Laboratory of Coordination Chemistry; Shenyang University of Chemical Technology; Shenyang 110142 China
| | - Yunhui Feng
- The key Laboratory of the Inorganic Molecule-Based Chemistry of Liaoning Province and Laboratory of Coordination Chemistry; Shenyang University of Chemical Technology; Shenyang 110142 China
| | - Bing Jia
- The key Laboratory of the Inorganic Molecule-Based Chemistry of Liaoning Province and Laboratory of Coordination Chemistry; Shenyang University of Chemical Technology; Shenyang 110142 China
| | - Tingting Peng
- The key Laboratory of the Inorganic Molecule-Based Chemistry of Liaoning Province and Laboratory of Coordination Chemistry; Shenyang University of Chemical Technology; Shenyang 110142 China
| | - Zhenzhen Qi
- The key Laboratory of the Inorganic Molecule-Based Chemistry of Liaoning Province and Laboratory of Coordination Chemistry; Shenyang University of Chemical Technology; Shenyang 110142 China
| | - Enjun Gao
- The key Laboratory of the Inorganic Molecule-Based Chemistry of Liaoning Province and Laboratory of Coordination Chemistry; Shenyang University of Chemical Technology; Shenyang 110142 China
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28
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Choi YS, Horning P, Aten S, Karelina K, Alzate-Correa D, Arthur JSC, Hoyt KR, Obrietan K. Mitogen- and Stress-Activated Protein Kinase 1 Regulates Status Epilepticus-Evoked Cell Death in the Hippocampus. ASN Neuro 2018; 9:1759091417726607. [PMID: 28870089 PMCID: PMC5588809 DOI: 10.1177/1759091417726607] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Mitogen-activated protein kinase (MAPK) signaling has been implicated in a wide range of neuronal processes, including development, plasticity, and viability. One of the principal downstream targets of both the extracellular signal-regulated kinase/MAPK pathway and the p38 MAPK pathway is Mitogen- and Stress-activated protein Kinase 1 (MSK1). Here, we sought to understand the role that MSK1 plays in neuroprotection against excitotoxic stimulation in the hippocampus. To this end, we utilized immunohistochemical labeling, a MSK1 null mouse line, cell viability assays, and array-based profiling approaches. Initially, we show that MSK1 is broadly expressed within the major neuronal cell layers of the hippocampus and that status epilepticus drives acute induction of MSK1 activation. In response to the status epilepticus paradigm, MSK1 KO mice exhibited a striking increase in vulnerability to pilocarpine-evoked cell death within the CA1 and CA3 cell layers. Further, cultured MSK1 null neurons exhibited a heighted level of N-methyl-D-aspartate-evoked excitotoxicity relative to wild-type neurons, as assessed using the lactate dehydrogenase assay. Given these findings, we examined the hippocampal transcriptional profile of MSK1 null mice. Affymetrix array profiling revealed that MSK1 deletion led to the significant (>1.25-fold) downregulation of 130 genes and an upregulation of 145 genes. Notably, functional analysis indicated that a subset of these genes contribute to neuroprotective signaling networks. Together, these data provide important new insights into the mechanism by which the MAPK/MSK1 signaling cassette confers neuroprotection against excitotoxic insults. Approaches designed to upregulate or mimic the functional effects of MSK1 may prove beneficial against an array of degenerative processes resulting from excitotoxic insults.
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Affiliation(s)
- Yun-Sik Choi
- 1 Department of Pharmaceutical Science and Technology, Catholic University of Daegu, Gyeongbuk, Republic of Korea
| | - Paul Horning
- 2 Department of Neuroscience, 2647 Ohio State University , Columbus, OH, USA
| | - Sydney Aten
- 2 Department of Neuroscience, 2647 Ohio State University , Columbus, OH, USA
| | - Kate Karelina
- 2 Department of Neuroscience, 2647 Ohio State University , Columbus, OH, USA
| | | | - J Simon C Arthur
- 4 College of Life Sciences, University of Dundee, Dundee DD1 5EH, Scotland, UK
| | - Kari R Hoyt
- 3 Division of Pharmacology, 2647 Ohio State University , Columbus, OH, USA
| | - Karl Obrietan
- 2 Department of Neuroscience, 2647 Ohio State University , Columbus, OH, USA
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29
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Kamemura N. Methylcyclopentadienyl manganese tricarbonyl increases cell vulnerability to oxidative stress on rat thymocytes. Drug Chem Toxicol 2018; 42:140-146. [PMID: 29359594 DOI: 10.1080/01480545.2018.1424180] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Methylcyclopentadienyl manganese tricarbonyl (MMT) is used as a gasoline antiknock additive. However, the toxic effect of MMT is currently not well understood. In this study, we investigated the toxic effect of MMT on rat thymocytes using a flow cytometer and fluorescent probes. MMT at 100-300 µM significantly increased the population of cells exhibiting propidium fluorescence, i.e., the population of dead cells. The intensity of BES-So-AM fluorescence significantly increased when using 100 µM MMT. In addition, the intensity of oxonol fluorescence in rat thymocytes increased with the treatment with MMT in a concentration-dependent manner (10-100 µM). The toxic effect of MMT was inhibited by quercetin, antioxidant flavonoid. Moreover, co-treatment with 30-100 µM MMT and 100 µM H2O2 increased the cell lethality further. These results indicate that MMT increases cell vulnerability to oxidative stress on rat thymocytes. This study provides insight into the toxic effect of MMT on the immune system.
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Affiliation(s)
- Norio Kamemura
- a Division of Bioscience and Bioindustry , Tokushima University , Tokushima , Japan
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30
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Wang Q, Du X, Zhou B, Li J, Lu W, Chen Q, Gao J. Mitochondrial dysfunction is responsible for fatty acid synthase inhibition-induced apoptosis in breast cancer cells by PdpaMn. Biomed Pharmacother 2017; 96:396-403. [PMID: 29031197 DOI: 10.1016/j.biopha.2017.10.008] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Revised: 09/14/2017] [Accepted: 10/02/2017] [Indexed: 12/21/2022] Open
Abstract
Targeting cellular metabolism is becoming a hallmark to overcome drug resistance in breast cancer treatment. Activation of fatty acid synthase (FASN) has been shown to promote breast cancer cell growth. However, there is no concrete report underlying the mechanism associated with mitochondrial dysfunction in relation to fatty acid synthase inhibition-induced apoptosis in breast cancer cells. The current study is aimed at exploring the effect of the novel manganese (Mn) complex, labeled as PdpaMn, on lipid metabolism and mitochondrial function in breast cancer cells. Herein, we observed that PdpaMn displayed strong cytotoxicity on breast cancer cell lines and selectively targeted the tumor without affecting the normal organs or cells in vivo. We also observed that PdpaMn could bind to TE domain of FASN and decrease the activity and the level of expression of FASN, which is an indication that FASN could serve as a target of PdpaMn. In addition, we demonstrated that PdpaMn increased intrinsic apoptosis in breast cancer cells relayed by a suppressed the level of expression of FASN, followed by the release of mitochondrial cytochrome c and the activation of caspases-9. Instigated by the above observations, we hypothesized that PdpaMn-induced apoptosis events are dependent on mitochondrial dysfunction. Indeed, we found that mitochondrial membrane potential (MMP) collapse, mitochondrial oxygen consumption reduction and adenosine triphosphate (ATP) release were deeply repressed. Furthermore, our results showed that PdpaMn significantly increased the reactive oxygen species (ROS) production, and the protection conferred by the free radical scavenger N-acetyl-cysteine (NAC) indicates that PdpaMn-induced apoptosis through an oxidative stress-associated mechanism. More so, the above results have demonstrated that mitochondrial dysfunction participated in FASN inhibition-induce apoptosis in breast cancer cells by PdpaMn. Therefore, PdpaMn may be considered as a good candidate for anti-breast cancer therapeutic option.
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Affiliation(s)
- Qiang Wang
- School of Pharmacy, Jiangsu University, Zhenjiang, 212013, China
| | - Xia Du
- School of Pharmacy, Jiangsu University, Zhenjiang, 212013, China
| | - Bingjie Zhou
- School of Pharmacy, Jiangsu University, Zhenjiang, 212013, China
| | - Jing Li
- School of Pharmacy, Jiangsu University, Zhenjiang, 212013, China
| | - Wenlong Lu
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, 212013, China
| | - Qiuyun Chen
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, 212013, China.
| | - Jing Gao
- School of Pharmacy, Jiangsu University, Zhenjiang, 212013, China.
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31
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Mitsuhashi Y, Furusawa Y, Aradate T, Zhao QL, Moniruzzaman R, Kanamori M, Noguchi K, Kondo T. 3-O-trans-p-coumaroyl-alphitolic acid, a triterpenoid from Zizyphus jujuba, leads to apoptotic cell death in human leukemia cells through reactive oxygen species production and activation of the unfolded protein response. PLoS One 2017; 12:e0183712. [PMID: 28832644 PMCID: PMC5568338 DOI: 10.1371/journal.pone.0183712] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2017] [Accepted: 08/09/2017] [Indexed: 11/23/2022] Open
Abstract
3-O-trans-p-coumaroyl-alphitolic acid (3OTPCA), a triterpenoid isolated from the plant Zizyphus jujuba (ZJ), is known to be cytotoxic to cancer cells; however, the molecular mechanism underlying 3OTPCA-induced cell death remains unknown. Here, we provide novel evidence that 3OTPCA induces apoptotic cell death in human leukemia cells. We found that 3OPTCA induces DNA fragmentation within 24 h after treatment in U937 cells, which was also observed in other leukemia cell lines, including Molt-4 and Jurkat cells. We then investigated other parameters involved in apoptosis, including phosphatidylserine externalization and caspase-3 cleavage in U937 cells treated with 3OTPCA. 3OTPCA caused significant DNA fragmentation, annexin-V binding, and caspase-3 cleavage, indicating that 3OTPCA exerts cytotoxicity through apoptosis induction. RNA-seq analysis revealed that the expression of transcripts associated with the unfolded protein response (UPR), such as spliced XBP-1 and CHOP, were up-regulated by 3OTPCA treatment. 3OTPCA-induced UPR activation may be due to endoplasmic reticulum (ER) stress because both 3OTPCA and thapsigargin, an endoplasmic Ca2+ transport ATPase inhibitor, increased intracellular calcium levels. 3OTPCA down-regulated the expression of Bcl-2, a target of CHOP, and led to the loss of the mitochondrial membrane, indicating that the intrinsic (mitochondrial) apoptotic pathway was triggered by 3OTPCA, likely through UPR activation. Furthermore, we found that 3OTPCA induced superoxide anion generation and, following p38 MAPK phosphorylation, caspase-8 cleavage without affecting Fas expression. It also induced subsequent Bid cleavage, which may enhance the apoptosis triggered by the intrinsic pathway. These findings reveal for the first time that 3OTPCA induces apoptotic cell death through the generation of reactive oxygen species and activation of UPR.
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Affiliation(s)
- Yohei Mitsuhashi
- Department of Radiological Sciences, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Sugitani, Toyama, Japan
| | - Yukihiro Furusawa
- Department of Radiological Sciences, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Sugitani, Toyama, Japan
- Department of Liberal Arts and Sciences, Toyama Prefectural University, Kurokawa, Toyama, Japan
- * E-mail:
| | - Tadashi Aradate
- Department of Medical Biology, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Sugitani, Toyama, Japan
| | - Qing-Li Zhao
- Department of Radiological Sciences, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Sugitani, Toyama, Japan
| | - Rohan Moniruzzaman
- Department of Oral and Maxillofacial Surgery, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Sugitani, Toyama, Japan
| | - Masahiko Kanamori
- Department of Human Science 1, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Sugitani, Toyama, Japan
| | - Kyo Noguchi
- Department of Radiology, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Sugitani, Toyama, Japan
| | - Takashi Kondo
- Department of Radiological Sciences, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Sugitani, Toyama, Japan
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32
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Smith MR, Fernandes J, Go YM, Jones DP. Redox dynamics of manganese as a mitochondrial life-death switch. Biochem Biophys Res Commun 2017; 482:388-398. [PMID: 28212723 PMCID: PMC5382988 DOI: 10.1016/j.bbrc.2016.10.126] [Citation(s) in RCA: 100] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2016] [Revised: 10/25/2016] [Accepted: 10/27/2016] [Indexed: 12/16/2022]
Abstract
Sten Orrenius, M.D., Ph.D., pioneered many areas of cellular and molecular toxicology and made seminal contributions to our knowledge of oxidative stress and glutathione (GSH) metabolism, organellar functions and Ca+2-dependent mechanisms of cell death, and mechanisms of apoptosis. On the occasion of his 80th birthday, we summarize current knowledge on redox biology of manganese (Mn) and its role in mechanisms of cell death. Mn is found in all organisms and has critical roles in cell survival and death mechanisms by regulating Mn-containing enzymes such as manganese superoxide dismutase (SOD2) or affecting expression and activity of caspases. Occupational exposures to Mn cause "manganism", a Parkinson's disease-like condition of neurotoxicity, and experimental studies show that Mn exposure leads to accumulation of Mn in the brain, especially in mitochondria, and neuronal cell death occurs with features of an apoptotic mechanism. Interesting questions are why a ubiquitous metal that is essential for mitochondrial function would accumulate to excessive levels, cause increased H2O2 production and lead to cell death. Is this due to the interactions of Mn with other essential metals, such as iron, or with toxic metals, such as cadmium? Why is the Mn loading in the human brain so variable, and why is there such a narrow window between dietary adequacy and toxicity? Are non-neuronal tissues similarly vulnerable to insufficiency and excess, yet not characterized? We conclude that Mn is an important component of the redox interface between an organism and its environment and warrants detailed studies to understand the role of Mn as a mitochondrial life-death switch.
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Affiliation(s)
- Matthew Ryan Smith
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, Emory University, Atlanta, GA 30322, USA
| | - Jolyn Fernandes
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, Emory University, Atlanta, GA 30322, USA
| | - Young-Mi Go
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, Emory University, Atlanta, GA 30322, USA
| | - Dean P Jones
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, Emory University, Atlanta, GA 30322, USA.
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33
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Farghadani R, Rajarajeswaran J, Mohd Hashim NB, Abdulla MA, Muniandy S. A novel β-diiminato manganeseIII complex as the promising anticancer agent induces G0/G1 cell cycle arrest and triggers apoptosis via mitochondrial-dependent pathways in MCF-7 and MDA-MB-231 human breast cancer cells. RSC Adv 2017. [DOI: 10.1039/c7ra02478a] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Novel β-diiminato manganeseIII complex has shown promising anti-breast cancer activity.
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Affiliation(s)
- Reyhaneh Farghadani
- Department of Molecular Medicine
- Faculty of Medicine
- University of Malaya
- Kuala Lumpur
- Malaysia
| | | | | | - Mahmood Ameen Abdulla
- Department of Biomedical Science
- Faculty of Medicine
- University of Malaya
- Kuala Lumpur
- Malaysia
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34
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Wang Y, Liu Y, Hu C, Ni X, Huang X. Tumor necrosis factor α-induced protein 8-like 1 promotes apoptosis by regulating B-cell leukemia/lymphoma-2 family proteins in RAW264.7 cells. Oncol Lett 2016; 12:3506-3512. [PMID: 27900028 DOI: 10.3892/ol.2016.5090] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2015] [Accepted: 08/19/2016] [Indexed: 01/18/2023] Open
Abstract
Although the newly identified protein tumor necrosis factor α-induced protein 8-like 1 (TNFAIP8L1), also known as TIPE1, has been reported to be able to induce apoptosis in human hepatocellular carcinoma cells, the involvement of TIPE1 in apoptosis remains to be elucidated. The present study investigated the pro-apoptotic effect of TIPE1 in an murine macrophage cell line, RAW264.7. The cell apoptosis rate was detected by flow cytometry. The results revealed that overexpressed TIPE1 could directly enhance the apoptosis and the cisplatin-induced cell death of RAW264.7 cells in vitro. Meanwhile, TIPE1 overexpression could suppress tumor growth in vivo. Furthermore, western blotting revealed that overexpressed TIPE1 could upregulate the expression of B-cell leukemia/lymphoma (Bcl)-2 associated X protein (Bax), Bcl-2 interacting killer (Bik) and p53 upregulated modulator of apoptosis (Puma), and activate the mitogen activated protein kinases (MAPKs) signaling pathway. However, western blotting demonstrated that inhibitors of the MAPKs pathway could not decrease the expression of Bax, Bik or Puma. These results indicated that TIPE1 could promote the apoptosis of RAW264.7 cells by upregulating the pro-apoptotic members of the Bcl-2 family of proteins, and that the MAPKs signaling pathway was not involved in the pro-apoptotic effect of TIPE1.
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Affiliation(s)
- Yinan Wang
- Department of Immunology, Basic Medicine Science, Medical College, Xiamen University, Xiamen, Fujian 361005, P.R. China
| | - Yao Liu
- Department of Immunology, Basic Medicine Science, Medical College, Xiamen University, Xiamen, Fujian 361005, P.R. China
| | - Chunfang Hu
- Department of Immunology, Basic Medicine Science, Medical College, Xiamen University, Xiamen, Fujian 361005, P.R. China
| | - Xiaoyan Ni
- Shaoxing People's Hospital, Shaoxing Hospital of Zhejiang University, Shaoxing, Zhejiang 312000, P.R. China
| | - Xiaobo Huang
- Department of Immunology, Basic Medicine Science, Medical College, Xiamen University, Xiamen, Fujian 361005, P.R. China
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Ge J, Wang C, Nie X, Yang J, Lu H, Song X, Su K, Li T, Han J, Zhang Y, Mao J, Gu Y, Zhao J, Jiang S, Wu Q. ROS-mediated apoptosis of HAPI microglia through p53 signaling following PFOS exposure. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2016; 46:9-16. [PMID: 27414741 DOI: 10.1016/j.etap.2016.06.025] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2016] [Revised: 05/26/2016] [Accepted: 06/26/2016] [Indexed: 06/06/2023]
Abstract
Perfluorooctane sulfonate (PFOS), the most extensively studied member of perfluoroalkyl and polyfluoroalkyl substances (PFASs), has been thought to be toxic to the central nervous system (CNS) of mammals. However, the neurotoxic effects of PFOS remain largely unknown. In this study, the effect of PFOS on microglial apoptosis was examined. The results showed that PFOS could significantly reduce the cell viability and mediate cell apoptosis in HAPI microglia, which was closely accompanied with ROS production and p53 overexpression. Moreover, p53 interference significantly ameliorated PFOS-triggered cytotoxic effects in HAPI microglia, including the downregulation of cleaved PARP and cleaved caspase 3. Interestingly, NAC, a ROS inhibitor, inhibited p53 expression, and decreased the apoptosis of HAPI microglia. Taken together, these findings suggest that upregulated production of ROS plays a vital role in PFOS-mediated apoptosis in HAPI microglia via the modulation of p53 signaling.
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Affiliation(s)
- Jianbin Ge
- Physiatry Department, The Second People's Hospital of Nan Tong, Nantong, Jiangsu 226001, People's Republic of China
| | - Cheng Wang
- Department of Nutrition and Food Hygiene, School of Public Health, Nantong University, Nantong, Jiangsu 226001, People's Republic of China
| | - Xiaoke Nie
- Department of Nutrition and Food Hygiene, School of Public Health, Nantong University, Nantong, Jiangsu 226001, People's Republic of China
| | - Jianbin Yang
- Department of Public Health, The Second People's Hospital of Nan Tong, Nantong, Jiangsu 226001, People's Republic of China
| | - Hongjian Lu
- Physiatry Department, The Second People's Hospital of Nan Tong, Nantong, Jiangsu 226001, People's Republic of China
| | - Xinjian Song
- Physiatry Department, The Second People's Hospital of Nan Tong, Nantong, Jiangsu 226001, People's Republic of China
| | - Kai Su
- School of Life Science, University of Science and Technology of China, Hefei, Anhui 230000, People's Republic of China
| | - Ting Li
- Department of Labor and Environmental Hygiene, School of Public Health, Nantong University, Nantong, Jiangsu 226001, People's Republic of China
| | - Jingling Han
- Department of Labor and Environmental Hygiene, School of Public Health, Nantong University, Nantong, Jiangsu 226001, People's Republic of China
| | - Yan Zhang
- Department of Nutrition and Food Hygiene, School of Public Health, Nantong University, Nantong, Jiangsu 226001, People's Republic of China
| | - Jiamin Mao
- Department of Labor and Environmental Hygiene, School of Public Health, Nantong University, Nantong, Jiangsu 226001, People's Republic of China
| | - Yiyang Gu
- Department of Labor and Environmental Hygiene, School of Public Health, Nantong University, Nantong, Jiangsu 226001, People's Republic of China
| | - Jianya Zhao
- Department of Nutrition and Food Hygiene, School of Public Health, Nantong University, Nantong, Jiangsu 226001, People's Republic of China
| | - Shengyang Jiang
- Department of Labor and Environmental Hygiene, School of Public Health, Nantong University, Nantong, Jiangsu 226001, People's Republic of China
| | - Qiyun Wu
- Department of Nutrition and Food Hygiene, School of Public Health, Nantong University, Nantong, Jiangsu 226001, People's Republic of China.
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36
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Wang YX, Sun Y, Huang Z, Wang P, Feng W, Li J, Yang P, Wang M, Sun L, Chen YJ, Liu C, Yue J, Gu LJ, Zeng Q, Lu WQ. Associations of urinary metal levels with serum hormones, spermatozoa apoptosis and sperm DNA damage in a Chinese population. ENVIRONMENT INTERNATIONAL 2016; 94:177-188. [PMID: 27258659 DOI: 10.1016/j.envint.2016.05.022] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2016] [Revised: 05/22/2016] [Accepted: 05/23/2016] [Indexed: 05/28/2023]
Abstract
BACKGROUND Exposure to metals, including essential and nonessential elements, is widespread and may be associated with male reproductive health. OBJECTIVE To examine whether environmental exposure to metals contributes to reproductive hormone changes, spermatozoa apoptosis and sperm DNA damage in a Chinese population. METHODS Eighteen metals (aluminum, arsenic, antimony, chromium, cobalt, copper, cadmium, iron, lead, manganese, molybdenum, nickel, selenium, tin, tungsten, thallium, uranium and zinc) were analyzed in two urine samples collected a few hours apart from male partners of couples attending an infertility clinic. Multivariable linear regression models were used to assess the cross-sectional associations of average urinary metal levels with serum hormones (n=511), spermatozoa apoptosis measures (n=460) and sperm DNA damage parameters (n=516). RESULTS We found significant inverse dose-dependent trends of urinary tin quartiles with total testosterone (T), and tin, nickel, zinc and molybdenum with the ratio of total T to luteinizing hormone (total T/LH ratio) (all Ptrend<0.05). Additionally, we found significantly dose-dependent trends of increasing urinary manganese quartiles with increasing percentage of Annexin V+/PI- spermatozoa and increasing iron with decreasing percentage of PI+ spermatozoa (both Ptrend<0.05). These dose-dependent trends remained suggestive or significant after controlling for multiple testing and other metals, and they persisted when the metals were modeled as continuous variables in a cubic spline analysis. There were no significant associations between urinary metals and sperm DNA damage after adjustment for multiple testing. CONCLUSION Environmental exposure to tin, nickel, zinc and molybdenum may be associated decreased total T or total T/LH ratio; manganese may induce spermatozoa apoptosis, while iron may be important for living spermatozoa. However, additional prospective research is needed to corroborate these findings in the general population.
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Affiliation(s)
- Yi-Xin Wang
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, PR China; Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, and State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, PR China
| | - Yang Sun
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, PR China; Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, and State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, PR China
| | - Zhen Huang
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, PR China; Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, and State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, PR China
| | - Peng Wang
- Department of Biostatistics, School of Public Health and Tropical Medicine, Southern Medical University, Guangzhou, Guangdong, PR China
| | - Wei Feng
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, PR China; Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, and State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, PR China
| | - Jin Li
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, PR China; Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, and State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, PR China
| | - Pan Yang
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, PR China; Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, and State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, PR China
| | - Mu Wang
- Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, and State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, PR China
| | - Li Sun
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, PR China; Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, and State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, PR China
| | - Ying-Jun Chen
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, PR China; Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, and State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, PR China
| | - Chong Liu
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, PR China; Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, and State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, PR China
| | - Jing Yue
- Reproductive Medicine Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, PR China
| | - Long-Jie Gu
- Reproductive Medicine Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, PR China
| | - Qiang Zeng
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, PR China; Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, and State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, PR China.
| | - Wen-Qing Lu
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, PR China; Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, and State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, PR China.
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Al-anbaky Q, Al-karakooly Z, Kilaparty SP, Agrawal M, Albkuri YM, RanguMagar AB, Ghosh A, Ali N. Cytotoxicity of Manganese (III) Complex in Human Breast Adenocarcinoma Cell Line Is Mediated by the Generation of Reactive Oxygen Species Followed by Mitochondrial Damage. Int J Toxicol 2016; 35:672-682. [DOI: 10.1177/1091581816659661] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Manganese (Mn) complexes are widely studied because of their important catalytic properties in synthetic and biochemical reactions. A Mn (III) complex of an amidoamine ligand was synthesized using a tetradentate amidoamine ligand. In this study, the Mn (III) complex was evaluated for its biological activity by measuring its cytotoxicity in human breast adenocarcinoma cell line (MCF-7). Cytotoxic effects of the Mn (III) complex were determined using established biomarkers in an attempt to delineate the mechanism of action and the utility of the complex as a potential anticancer drug. The Mn (III) complex induces cell death in a dose- and time-dependent manner as shown by microculture tetrazolium assay, a measure of cytotoxic cell death. Our results demonstrated that cytotoxic effects were significantly increased at higher concentrations of Mn (III) complex and with longer time of treatment. The IC50 (Inhibitor concentration that results in 50% cell death) value of Mn (III) complex in MCF-7 cells was determined to be 2.5 mmol/L for 24 hours of treatment. In additional experiments, we determined the Mn (III) complex–mediated cell death was due to both apoptotic and nonspecific necrotic cell death mechanisms. This was assessed by ethidium bromide/acridine orange staining and flow cytometry techniques. The Mn (III) complex produced reactive oxygen species (ROS) triggering the expression of manganese superoxide dismutase 1 and ultimately damaging the mitochondrial function as is evident by a decline in mitochondrial membrane potential. Treatment of the cells with free radical scavenger, N, N-dimethylthiourea decreased Mn (III) complex–mediated generation of ROS and attenuated apoptosis. Together, these results suggest that the Mn (III) complex–mediated MCF-7 cell death utilizes combined mechanism involving apoptosis and necrosis perhaps due to the generation of ROS.
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Affiliation(s)
- Qudes Al-anbaky
- Department of Biology, University of Arkansas at Little Rock, Little Rock, AR, USA
- Department of Biology, University of Diyala, Baqubah, Iraq
| | | | - Surya P. Kilaparty
- Department of Biology, University of Arkansas at Little Rock, Little Rock, AR, USA
| | - Megha Agrawal
- Department of Biology, University of Arkansas at Little Rock, Little Rock, AR, USA
| | - Yahya M. Albkuri
- Department of Chemistry, University of Arkansas at Little Rock, Little Rock, AR, USA
| | - Ambar B. RanguMagar
- Department of Chemistry, University of Arkansas at Little Rock, Little Rock, AR, USA
| | - Anindya Ghosh
- Department of Chemistry, University of Arkansas at Little Rock, Little Rock, AR, USA
| | - Nawab Ali
- Department of Biology, University of Arkansas at Little Rock, Little Rock, AR, USA
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38
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Bourgoin SG, Hui W. Role of mitogen- and stress-activated kinases in inflammatory arthritis. World J Pharmacol 2015; 4:265-273. [DOI: 10.5497/wjp.v4.i4.265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/29/2015] [Revised: 09/10/2015] [Accepted: 10/19/2015] [Indexed: 02/06/2023] Open
Abstract
Lysophosphatidic acid (LPA) is a pleiotropic lipid mediator that promotes motility, survival, and the synthesis of chemokines/cytokines in human fibroblast-like synoviocytes (FLS) from patients with rheumatoid arthritis. LPA activates several proteins within the mitogen activated protein (MAP) kinase signaling network, including extracellular signal-regulated kinases (ERK) 1/2 and p38 MAP kinase (MAPK). Upon docking to mitogen- and stress-activated kinases (MSKs), ERK1/2 and p38 MAPK phosphorylate serine and threonine residues within its C-terminal domain and cause autophosphorylation of MSKs. Activated MSKs can then directly phosphorylate cAMP response element-binding protein (CREB) at Ser133 in FLS. Phosphorylation of CREB by MSKs is essential for the production of pro-inflammatory and anti-inflammatory cytokines. However, other downstream effectors of MSK1/2 such as nuclear factor-kappa B, histone H3, and high mobility group nucleosome binding domain 1 may also regulate gene expression in immune cells involved in disease pathogenesis. MSKs are master regulators of cell function that integrate signals induced by growth factors, pro-inflammatory cytokines, and cellular stresses, as well as those induced by LPA.
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Lang E, Bissinger R, Fajol A, Salker MS, Singh Y, Zelenak C, Ghashghaeinia M, Gu S, Jilani K, Lupescu A, Reyskens KMSE, Ackermann TF, Föller M, Schleicher E, Sheffield WP, Arthur JSC, Lang F, Qadri SM. Accelerated apoptotic death and in vivo turnover of erythrocytes in mice lacking functional mitogen- and stress-activated kinase MSK1/2. Sci Rep 2015; 5:17316. [PMID: 26611568 PMCID: PMC4661433 DOI: 10.1038/srep17316] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2015] [Accepted: 10/28/2015] [Indexed: 12/25/2022] Open
Abstract
The mitogen- and stress-activated kinase MSK1/2 plays a decisive role in apoptosis. In analogy to apoptosis of nucleated cells, suicidal erythrocyte death called eryptosis is characterized by cell shrinkage and cell membrane scrambling leading to phosphatidylserine (PS) externalization. Here, we explored whether MSK1/2 participates in the regulation of eryptosis. To this end, erythrocytes were isolated from mice lacking functional MSK1/2 (msk−/−) and corresponding wild-type mice (msk+/+). Blood count, hematocrit, hemoglobin concentration and mean erythrocyte volume were similar in both msk−/− and msk+/+ mice, but reticulocyte count was significantly increased in msk−/− mice. Cell membrane PS exposure was similar in untreated msk−/− and msk+/+ erythrocytes, but was enhanced by pathophysiological cell stressors ex vivo such as hyperosmotic shock or energy depletion to significantly higher levels in msk−/− erythrocytes than in msk+/+ erythrocytes. Cell shrinkage following hyperosmotic shock and energy depletion, as well as hemolysis following decrease of extracellular osmolarity was more pronounced in msk−/− erythrocytes. The in vivo clearance of autologously-infused CFSE-labeled erythrocytes from circulating blood was faster in msk−/− mice. The spleens from msk−/− mice contained a significantly greater number of PS-exposing erythrocytes than spleens from msk+/+ mice. The present observations point to accelerated eryptosis and subsequent clearance of erythrocytes leading to enhanced erythrocyte turnover in MSK1/2-deficient mice.
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Affiliation(s)
- Elisabeth Lang
- Department of Physiology, University of Tübingen, Gmelinstr. 5, 72076 Tübingen, Germany.,Department of Gastroenterology, Hepatology and Infectious Diseases, University of Düsseldorf, Moorenstrasse 5, 40225 Düsseldorf, Germany
| | - Rosi Bissinger
- Department of Physiology, University of Tübingen, Gmelinstr. 5, 72076 Tübingen, Germany
| | - Abul Fajol
- Department of Physiology, University of Tübingen, Gmelinstr. 5, 72076 Tübingen, Germany
| | - Madhuri S Salker
- Department of Physiology, University of Tübingen, Gmelinstr. 5, 72076 Tübingen, Germany
| | - Yogesh Singh
- Department of Physiology, University of Tübingen, Gmelinstr. 5, 72076 Tübingen, Germany
| | - Christine Zelenak
- Charité Medical University Berlin, Charitéplatz 1, 10117 Berlin, Germany
| | - Mehrdad Ghashghaeinia
- Department of Physiology, University of Tübingen, Gmelinstr. 5, 72076 Tübingen, Germany
| | - Shuchen Gu
- Department of Physiology, University of Tübingen, Gmelinstr. 5, 72076 Tübingen, Germany.,Life Sciences Institute, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Kashif Jilani
- Department of Physiology, University of Tübingen, Gmelinstr. 5, 72076 Tübingen, Germany.,Department of Biochemistry, University of Agriculture, 38040 Faisalabad, Pakistan
| | - Adrian Lupescu
- Department of Physiology, University of Tübingen, Gmelinstr. 5, 72076 Tübingen, Germany
| | - Kathleen M S E Reyskens
- MRC Phosphorylation Unit, University of Dundee, Dow Street, Dundee DD1 5EH, United Kingdom.,Division of Cell Signaling and Immunology, College of Life Sciences, University of Dundee, Dow Street, Dundee DD1 5EH, United Kingdom
| | - Teresa F Ackermann
- Department of Physiology, University of Tübingen, Gmelinstr. 5, 72076 Tübingen, Germany
| | - Michael Föller
- Department of Physiology, University of Tübingen, Gmelinstr. 5, 72076 Tübingen, Germany.,nstitute of Agricultural and Nutritional Sciences, Martin Luther University Halle-Wittenberg, Von-Danckelmann-Platz 2, 06120 Halle (Saale), Germany
| | - Erwin Schleicher
- Department of Internal Medicine, University of Tübingen, Otfried-Müller-Straβe 10, 72076 Tübingen, Germany
| | - William P Sheffield
- Department of Pathology and Molecular Medicine, McMaster University, 1280 Main Street West, Hamilton, Ontario L8S4K1, Canada.,Centre for Innovation, Canadian Blood Services, 1280 Main Street West, Hamilton, Ontario L8S4K1, Canada
| | - J Simon C Arthur
- MRC Phosphorylation Unit, University of Dundee, Dow Street, Dundee DD1 5EH, United Kingdom.,Division of Cell Signaling and Immunology, College of Life Sciences, University of Dundee, Dow Street, Dundee DD1 5EH, United Kingdom
| | - Florian Lang
- Department of Physiology, University of Tübingen, Gmelinstr. 5, 72076 Tübingen, Germany
| | - Syed M Qadri
- Department of Physiology, University of Tübingen, Gmelinstr. 5, 72076 Tübingen, Germany.,Department of Pathology and Molecular Medicine, McMaster University, 1280 Main Street West, Hamilton, Ontario L8S4K1, Canada.,Centre for Innovation, Canadian Blood Services, 1280 Main Street West, Hamilton, Ontario L8S4K1, Canada
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Ma X, Han J, Wu Q, Liu H, Shi S, Wang C, Wang Y, Xiao J, Zhao J, Jiang J, Wan C. Involvement of dysregulated Wip1 in manganese-induced p53 signaling and neuronal apoptosis. Toxicol Lett 2015; 235:17-27. [PMID: 25791630 DOI: 10.1016/j.toxlet.2014.12.019] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2014] [Revised: 12/22/2014] [Accepted: 12/29/2014] [Indexed: 02/07/2023]
Abstract
Overexposure to manganese (Mn) has been known to induce neuronal death and neurodegenerative symptoms. However, the precise mechanisms underlying Mn neurotoxicity remain incompletely understood. In the present study, we established a Mn-exposed rat model and found that downregulation of wild type p53-induced phosphatase 1 (Wip1) might contribute to p53 activation and resultant neuronal apoptosis following Mn exposure. Western blot and immunohistochemical analyses revealed that the expression of Wip1 was markedly decreased following Mn exposure. In addition, immunofluorescence assay demonstrated that Mn exposure led to significant reduction in the number of Wip1-positive neurons. Accordingly, the expression of Mdm2 was progressively decreased, which was accompanied with markedly increased expression of p53, as well as the ratio of Bax/Bcl-xl. Furthermore, we showed that Mn exposure decreased the viability and induced apparent apoptosis in NFG-differentiated neuron-like PC12 cells. Importantly, the expression of Wip1 decreased progressively, whereas the level of cellular p53 and the ratio of Bax/Bcl-xl were elevated, which resembled the expression of the proteins in animal model studies. Depletion of p53 significantly ameliorated Mn-mediated cytotoxic effect in PC12 cells. In addition, ectopic expression of Wip1 attenuated Mn-induced p53 signaling as well as apoptosis in PC12 cells. Finally, we observed that depletion of Wip1 augmented Mn-induced apoptosis in PC12 cells. Collectively, these findings suggest that downregulated Wip1 expression plays an important role in Mn-induced neuronal death in the brain striatum via the modulation of p53 signaling.
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Affiliation(s)
- Xia Ma
- Department of Occupational Medicine and Environmental Toxicology, School of Public Health, Nantong University, Nantong, People's Republic of China
| | - Jingling Han
- Department of Occupational Medicine and Environmental Toxicology, School of Public Health, Nantong University, Nantong, People's Republic of China
| | - Qiyun Wu
- The Jiangsu Province Key Laboratory of Neuroregeneration, Nantong University, Nantong, People's Republic of China
| | - Hanzhang Liu
- The Jiangsu Province Key Laboratory of Neuroregeneration, Nantong University, Nantong, People's Republic of China
| | - Shangshi Shi
- Department of Occupational Medicine and Environmental Toxicology, School of Public Health, Nantong University, Nantong, People's Republic of China
| | - Cheng Wang
- Department of Occupational Medicine and Environmental Toxicology, School of Public Health, Nantong University, Nantong, People's Republic of China
| | - Yueran Wang
- Department of Occupational Medicine and Environmental Toxicology, School of Public Health, Nantong University, Nantong, People's Republic of China
| | - Jing Xiao
- Department of Occupational Medicine and Environmental Toxicology, School of Public Health, Nantong University, Nantong, People's Republic of China
| | - Jianya Zhao
- Department of Nutrition and Food Hygiene, School of Public Health, Nantong University, Nantong, People's Republic of China
| | - Junkang Jiang
- Department of Occupational Medicine and Environmental Toxicology, School of Public Health, Nantong University, Nantong, People's Republic of China; The Jiangsu Province Key Laboratory of Neuroregeneration, Nantong University, Nantong, People's Republic of China.
| | - Chunhua Wan
- Department of Nutrition and Food Hygiene, School of Public Health, Nantong University, Nantong, People's Republic of China; The Jiangsu Province Key Laboratory of Neuroregeneration, Nantong University, Nantong, People's Republic of China.
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41
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Liu J, Guo W, Li J, Li X, Geng J, Chen Q, Gao J. Tumor-targeting novel manganese complex induces ROS-mediated apoptotic and autophagic cancer cell death. Int J Mol Med 2015; 35:607-16. [PMID: 25604962 PMCID: PMC4314420 DOI: 10.3892/ijmm.2015.2073] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2014] [Accepted: 12/24/2014] [Indexed: 12/22/2022] Open
Abstract
In this study, the antitumor activity of the novel manganese (II) compound, Adpa-Mn {[(Adpa)Mn(Cl)(H(2)O)] (Adpa=bis(2-pyridylmethyl)amino-2-propionic acid)}, and its possible mechanisms of action were investigated. In vitro, the growth inhibitory effects of Adpa-Mn (with IC(50) values lower than 15 µM) on tumor cell lines were examined by MTT assay. We found that this compound was more selective against cancer cells than the popular chemotherapeutic reagent, cisplatin. We then found that Adpa-Mn achieved its selectivity against cancer cells through the transferrin (Tf)-transferrin receptor (TfR) system, which is highly expressed in tumor cells. Furthermore, Adpa-Mn induced both apoptosis and autophagy, as indicated by chromatin condensation, the activation of poly(ADP-ribose) polymerase (PARP), Annexin V/propidium iodide staining, an enhanced fluorescence intensity of monodansylcadaverine (MDC), as well as the elevated expression of the autophagy-related protein, microtubule-associated protein 1 light chain 3 (LC3). In addition, Adpa-Mn induced the generation of intracellular reactive oxygen species (ROS) and its anticancer effects were significantly reduced following pre-treatment with the antioxidant, N-acetyl cysteine, indicating that ROS triggered cell death. In vivo, the induction of apoptosis and autophagy in tumor tissue was confirmed following treatment with Adpa-Mn, which contributed to its significant antitumor activity against hepatocellular carcinoma (Hep-A cell) xenografts at 10 mg/kg. Taken together, these data suggest the possible use of Adpa-Mn as a novel anticancer drug.
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Affiliation(s)
- Jia Liu
- School of Pharmacy, Jiangsu University, Zhenjiang, Jiangsu 212013, P.R. China
| | - Wenjie Guo
- School of Pharmacy, Jiangsu University, Zhenjiang, Jiangsu 212013, P.R. China
| | - Jing Li
- School of Pharmacy, Jiangsu University, Zhenjiang, Jiangsu 212013, P.R. China
| | - Xiang Li
- School of Pharmacy, Jiangsu University, Zhenjiang, Jiangsu 212013, P.R. China
| | - Ji Geng
- School of Pharmacy, Jiangsu University, Zhenjiang, Jiangsu 212013, P.R. China
| | - Qiuyun Chen
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, P.R. China
| | - Jing Gao
- School of Pharmacy, Jiangsu University, Zhenjiang, Jiangsu 212013, P.R. China
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42
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Kumar N, Attri P, Choi EH, Sup Uhm H. Influence of water vapour with non-thermal plasma jet on the apoptosis of SK-BR-3 breast cancer cells. RSC Adv 2015. [DOI: 10.1039/c4ra15879b] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Hydroxyl radicals (OH) generated through H2O + N2plasma induce apoptosis in SK-BR-3 breast cancer cells through a DNA damage signalling cascade.
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Affiliation(s)
- Naresh Kumar
- Plasma Bioscience Research Center/Department of Electrical and Biological Physics
- Kwangwoon University
- Seoul 139-701
- Korea
| | - Pankaj Attri
- Plasma Bioscience Research Center/Department of Electrical and Biological Physics
- Kwangwoon University
- Seoul 139-701
- Korea
| | - Eun Ha Choi
- Plasma Bioscience Research Center/Department of Electrical and Biological Physics
- Kwangwoon University
- Seoul 139-701
- Korea
| | - Han Sup Uhm
- Plasma Bioscience Research Center/Department of Electrical and Biological Physics
- Kwangwoon University
- Seoul 139-701
- Korea
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43
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A novel manganese complex LMnAc selectively kills cancer cells by induction of ROS-triggered and mitochondrial-mediated cell death. SCIENCE CHINA-LIFE SCIENCES 2014; 57:998-1010. [PMID: 24935782 DOI: 10.1007/s11427-014-4682-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Received: 04/21/2013] [Accepted: 11/08/2013] [Indexed: 01/01/2023]
Abstract
We previously identified a novel synthesized metal compound, LMnAc ([L2Mn2(Ac)(H2O)2](Ac) (L=bis(2-pyridylmethyl) amino-2-propionic acid)). This compound exhibited significant inhibition on cancer cell proliferation and was more selective against cancer cells than was the popular chemotherapeutic reagent cisplatin. In this study, we further investigated the underlying molecular mechanisms of LMnAc-induced cancer cell death. We found that LMnAc achieved its selectivity against cancer cells through the transferrin-transferrin receptor system, which is highly expressed in tumor cells. LMnAc triggered cancer cells to commit autophagy and apoptosis, which was mediated by the mitochondrial pathway. Moreover, LMnAc disrupted mitochondrial function, resulting in mitochondrial membrane potential collapse and ATP reduction. In addition, LMnAc induced intracellular Ca(2+) overload and reactive oxygen species generation. Interestingly, its anticancer effect was significantly reduced following pretreatment with the antioxidant N-acetyl cysteine, indicating that reactive oxygen species triggered cell death. Altogether, our data suggest that LMnAc appears to be a selectively promising anticancer drug candidate.
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44
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Oh CC, Nguy MQ, Schwenke DC, Migrino RQ, Thornburg K, Reaven P. p38α mitogen-activated kinase mediates cardiomyocyte apoptosis induced by palmitate. Biochem Biophys Res Commun 2014; 450:628-33. [PMID: 24931668 DOI: 10.1016/j.bbrc.2014.06.023] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2014] [Accepted: 06/05/2014] [Indexed: 11/18/2022]
Abstract
RATIONALE The mechanisms underlying lipotoxic/diabetic cardiomyopathy remain poorly understood. Saturated fatty acid (SFA) levels, elevated in obesity and type 2 diabetes, induce apoptosis in many cell types including cardiomyocytes. Signaling pathways, including the p38α mitogen-activated kinase (MAPK)-dependent pathway, have been implicated in apoptosis due to a diverse range of insults. OBJECTIVE We tested the hypothesis that SFA-induced cardiomyocyte apoptosis is dependent on p38α activation. METHODS AND RESULTS Human adult ventricular cardiomyocytes (AC16 cells) were exposed to high physiological levels of palmitate (PA), a SFA. The apoptotic response was measured using annexin-V by flow cytometry, and the p38α-dependent pathway was evaluated using a p38 inhibitor PD169316, and by p38α small interfering RNA (siRNA) knockdown. PA exposure for 16 h dose-dependently increased apoptosis in AC16 cardiomyocytes (control: 2.6±0.6%, 150 μM PA: 3.5±0.9%, 300 μM PA: 11.5±1.6%, n=4, p<0.01). PA did not change total p38α protein levels, but increased p38α phosphorylation dose-dependently (n=5, p<0.01). PD169316 tended to reduce PA-induced apoptosis (n=4, p=0.05). Specific p38α siRNA markedly reduced the expression of p38α but not p38β (n=3, p<0.0001), and dose-dependently attenuated PA-induced apoptosis (control siRNA: 7.7±1.0%, 300 μM PA: 34.4±5.0%, 300 μM PA+30 pmol siRNA: 23.7±4.4%, 300 μM PA+60 pmol siRNA: 19.7±2.6%, 300 μM PA+120 pmol siRNA: 17.3±2.8%, n=4, p<0.0001). CONCLUSIONS These results demonstrate that PA induces p38α activation, and reducing p38α expression attenuates PA-induced cardiomyocyte apoptosis. Our results support a potential mechanism by which high plasma SFA levels through p38α activation may lead to the development of lipotoxic/diabetic cardiomyopathy.
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Affiliation(s)
- Charles C Oh
- Phoenix VA HealthCare System, Phoenix, AZ, United States.
| | - Michael Q Nguy
- Phoenix VA HealthCare System, Phoenix, AZ, United States
| | | | | | - Kent Thornburg
- Oregon Health and Science University, 3181 Sam Jackson Park Rd, Portland, OR 97239, United States
| | - Peter Reaven
- Phoenix VA HealthCare System, Phoenix, AZ, United States
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45
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Whitehead A, Zhang S, Roach JL, Galvez F. Common functional targets of adaptive micro- and macro-evolutionary divergence in killifish. Mol Ecol 2014; 22:3780-96. [PMID: 23841861 DOI: 10.1111/mec.12316] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2013] [Revised: 03/07/2013] [Accepted: 03/09/2013] [Indexed: 01/08/2023]
Abstract
Environmental salinity presents a key barrier to dispersal for most aquatic organisms, and adaptation to alternate osmotic environments likely enables species diversification. Little is known of the functional basis for derived tolerance to environmental salinity. We integrate comparative physiology and functional genomics to explore the mechanistic underpinnings of evolved variation in osmotic plasticity within and among two species of killifish; Fundulus majalis harbours the ancestral mainly salt-tolerant phenotype, whereas Fundulus heteroclitus harbours a derived physiology that retains extreme salt tolerance but with expanded osmotic plasticity towards the freshwater end of the osmotic continuum. Common-garden comparative hypo-osmotic challenge experiments show that F. heteroclitus is capable of remodelling gill epithelia more quickly and at more extreme osmotic challenge than F. majalis. We detect an unusual pattern of baseline transcriptome divergence, where neutral evolutionary processes appear to govern expression divergence within species, but patterns of divergence for these genes between species do not follow neutral expectations. During acclimation, genome expression profiling identifies mechanisms of acclimation-associated response that are conserved within the genus including regulation of paracellular permeability. In contrast, several responses vary among species including those putatively associated with cell volume regulation, and these same mechanisms are targets for adaptive physiological divergence along osmotic gradients within F. heteroclitus. As such, the genomic and physiological mechanisms that are associated with adaptive fine-tuning within species also contribute to macro-evolutionary divergence as species diversify across osmotic niches.
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Affiliation(s)
- Andrew Whitehead
- Department of Environmental Toxicology, University of California Davis, 4138 Meyer Hall, One Shields Avenue, Davis, CA 95616, USA.
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Kaushal N, Robson MJ, Rosen A, McCurdy CR, Matsumoto RR. Neuroprotective targets through which 6-acetyl-3-(4-(4-(4-fluorophenyl)piperazin-1-yl)butyl)benzo[d]oxazol-2(3H)-one (SN79), a sigma receptor ligand, mitigates the effects of methamphetamine in vitro. Eur J Pharmacol 2013; 724:193-203. [PMID: 24380829 DOI: 10.1016/j.ejphar.2013.12.039] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2013] [Revised: 11/16/2013] [Accepted: 12/12/2013] [Indexed: 10/25/2022]
Abstract
Exposure to high or repeated doses of methamphetamine can cause hyperthermia and neurotoxicity, which are thought to increase the risk of developing a variety of neurological conditions. Sigma receptor antagonism can prevent methamphetamine-induced hyperthermia and neurotoxicity, but the underlying cellular targets through which the neuroprotection is conveyed remain unknown. Differentiated NG108-15 cells were thus used as a model system to begin elucidating the neuroprotective mechanisms targeted by sigma receptor antagonists to mitigate the effects of methamphetamine. In differentiated NG108-15 cells, methamphetamine caused the generation of reactive oxygen/nitrogen species, an increase in PERK-mediated endoplasmic reticulum stress and the activation of caspase-3, -8 and -9, ultimately resulting in apoptosis at micromolar concentrations, and necrotic cell death at higher concentrations. The sigma receptor antagonist, 6-acetyl-3-(4-(4-(4-fluorophenyl)piperazin-1-yl)butyl)benzo[d]oxazol-2(3H)-one (SN79), attenuated methamphetamine-induced increases in reactive oxygen/nitrogen species, activation of caspase-3, -8 and -9 and accompanying cellular toxicity. In contrast, 1,3-di(2-tolyl)-guanidine (DTG), a sigma receptor agonist, shifted the dose response curve of methamphetamine-induced cell death towards the left. To probe the effect of temperature on neurotoxicity, NG108-15 cells maintained at an elevated temperature (40 °C) exhibited a significant and synergistic increase in cell death in response to methamphetamine, compared to cells maintained at a normal cell culture temperature (37 °C). SN79 attenuated the enhanced cell death observed in the methamphetamine-treated cells at 40 °C. Together, the data demonstrate that SN79 reduces methamphetamine-induced reactive oxygen/nitrogen species generation and caspase activation, thereby conveying neuroprotective effects against methamphetamine under regular and elevated temperature conditions.
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Affiliation(s)
- Nidhi Kaushal
- Department of Basic Pharmaceutical Sciences, School of Pharmacy, West Virginia University, Morgantown, WV 26506, USA
| | - Matthew J Robson
- Department of Basic Pharmaceutical Sciences, School of Pharmacy, West Virginia University, Morgantown, WV 26506, USA
| | - Abagail Rosen
- Department of Basic Pharmaceutical Sciences, School of Pharmacy, West Virginia University, Morgantown, WV 26506, USA
| | - Christopher R McCurdy
- Department of Medicinal Chemistry, School of Pharmacy, University of Mississippi, MS 38677, USA
| | - Rae R Matsumoto
- Department of Basic Pharmaceutical Sciences, School of Pharmacy, West Virginia University, Morgantown, WV 26506, USA.
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The synthetic flavonoid WYC02-9 inhibits cervical cancer cell migration/invasion and angiogenesis via MAPK14 signaling. Gynecol Oncol 2013; 131:734-43. [DOI: 10.1016/j.ygyno.2013.10.012] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2013] [Revised: 09/29/2013] [Accepted: 10/11/2013] [Indexed: 12/14/2022]
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Liu XF, Zhang LM, Guan HN, Zhang ZW, Xu SW. Effects of oxidative stress on apoptosis in manganese-induced testicular toxicity in cocks. Food Chem Toxicol 2013; 60:168-76. [DOI: 10.1016/j.fct.2013.07.058] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2012] [Revised: 04/19/2013] [Accepted: 07/22/2013] [Indexed: 01/21/2023]
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Mitogen- and stress-activated protein kinase 1 activates osteoclastogenesis in vitro and affects bone destruction in vivo. J Mol Med (Berl) 2013; 91:977-87. [DOI: 10.1007/s00109-013-1035-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2012] [Revised: 02/07/2013] [Accepted: 03/25/2013] [Indexed: 10/26/2022]
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50
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Mercer N, Ramakrishnan B, Boeggeman E, Verdi L, Qasba PK. Use of novel mutant galactosyltransferase for the bioconjugation of terminal N-acetylglucosamine (GlcNAc) residues on live cell surface. Bioconjug Chem 2013; 24:144-52. [PMID: 23259695 PMCID: PMC3547369 DOI: 10.1021/bc300542z] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
On the basis of the crystal structure of bovine β4Gal-T1 enzyme, mutation of a single amino acid Y289 to L289 (Y289L) changed its donor specificity from Gal to N-acetyl-galactosamine (GalNAc). A chemoenzymatic method that uses GalNAc analogues like GalNAz or 2-keto-Gal as sugar donors with the enzyme Y289L-β4Gal-T1 has identified hundreds of cytosolic and nuclear proteins that have O-GlcNAc modifications. To avoid potential cytotoxicity at Mn(2+) concentrations required to selectively modify GlcNAc residues on the surface of live cells, we have engineered a Mg(2+)-dependent enzyme. Previously, we found that the mutation of the metal-binding residue Met-344 to His-344 in bovine β4Gal-T1 enzyme altered its metal-ion specificity in such a way that the M344H-β4Gal-T1 enzyme exhibits better catalytic activity with Mg(2+) than with Mn(2+). Here, we find that, when these two mutations are combined, the double mutant, Y289L-M344H-β4Gal-T1, transfers GalNAc and its analogue sugars to the acceptor GlcNAc in the presence of Mg(2+). Using this mutant enzyme, we have detected free GlcNAc residues on the surface glycans of live HeLa cells and platelets. The specific transfer of a synthetic sugar with a chemical handle to the terminal GlcNAc residues on the surface of live cells provides a novel tool for selective modification, detection, and isolation of GlcNAc-ending glycans present on the cellular surface.
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Affiliation(s)
- Natalia Mercer
- Structural Glycobiology Section, CCR-Nanobiology Program, Center for Cancer Research, Frederick National Laboratory for Cancer Research, Frederick, MD 21702
| | - Boopathy Ramakrishnan
- Structural Glycobiology Section, CCR-Nanobiology Program, Center for Cancer Research, Frederick National Laboratory for Cancer Research, Frederick, MD 21702
- Basic Science Program, SAIC-Frederick, Inc., Frederick National Laboratory for Cancer Research, Frederick, MD 21702
| | - Elizabeth Boeggeman
- Structural Glycobiology Section, CCR-Nanobiology Program, Center for Cancer Research, Frederick National Laboratory for Cancer Research, Frederick, MD 21702
- Basic Science Program, SAIC-Frederick, Inc., Frederick National Laboratory for Cancer Research, Frederick, MD 21702
| | - Luke Verdi
- Structural Glycobiology Section, CCR-Nanobiology Program, Center for Cancer Research, Frederick National Laboratory for Cancer Research, Frederick, MD 21702
| | - Pradman K. Qasba
- Structural Glycobiology Section, CCR-Nanobiology Program, Center for Cancer Research, Frederick National Laboratory for Cancer Research, Frederick, MD 21702
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