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Santos MA, Franco FN, Caldeira CA, de Araújo GR, Vieira A, Chaves MM. Resveratrol has its antioxidant and anti-inflammatory protective mechanisms decreased in aging. Arch Gerontol Geriatr 2023; 107:104895. [PMID: 36525827 DOI: 10.1016/j.archger.2022.104895] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Revised: 12/01/2022] [Accepted: 12/04/2022] [Indexed: 12/12/2022]
Abstract
In the elderly, there is an increase in oxidative and inflammatory activity. Resveratrol (RSV) is a polyphenol that has several proven biological activities, such as antioxidant and anti-inflammatory. Thus, the aim of our study was to verify the possible antioxidant and anti-inflammatory effects of RSV on human mononuclear cells (PBMCs) from donors aged between 40 and 59 and 60-80 years old. For this, 6-8 patients were selected by age group. Cells were isolated and divided into 4 groups: Control (C), RSV only, H2O2 (to induce an oxidizing environment - C+) and H2O2+RSV. The quantification of reactive nitrogen species (NO and ONOO-), as well as pro and anti-inflammatory cytokines (TNFα, IL-6 and IL-10) was performed. Pearson's correlation and comparison between groups were performed (p<0.05). Our results showed a greater role of RSV in the middle-aged compared to the elderly group, in relation to the balance of NO/ONOO- and the levels of cytokines IL-6 and TNFα. It was also possible to observe an improvement in the anti-inflammatory profile in both age groups, but more effective in the cells in the middle-aged group. Thus, we could observe that RSV has better activity in the reduction of important biomarkers of oxidation and inflammation.
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Affiliation(s)
- Milena Almeida Santos
- Biochemistry Laboratory of Aging and Correlated Diseases, Department of Biochemistry and Immunology, Biological Sciences Institute, Federal University of Minas Gerais, Av. Antônio Carlos 6627, CP 486, 30161-970, Belo Horizonte, MG Brazil
| | - Filipe Nogueira Franco
- Biochemistry Laboratory of Aging and Correlated Diseases, Department of Biochemistry and Immunology, Biological Sciences Institute, Federal University of Minas Gerais, Av. Antônio Carlos 6627, CP 486, 30161-970, Belo Horizonte, MG Brazil
| | - Camila Amaro Caldeira
- Biochemistry Laboratory of Aging and Correlated Diseases, Department of Biochemistry and Immunology, Biological Sciences Institute, Federal University of Minas Gerais, Av. Antônio Carlos 6627, CP 486, 30161-970, Belo Horizonte, MG Brazil
| | - Glaucy Rodrigues de Araújo
- Biochemistry Laboratory of Aging and Correlated Diseases, Department of Biochemistry and Immunology, Biological Sciences Institute, Federal University of Minas Gerais, Av. Antônio Carlos 6627, CP 486, 30161-970, Belo Horizonte, MG Brazil
| | - Alessandra Vieira
- Biochemistry Laboratory of Aging and Correlated Diseases, Department of Biochemistry and Immunology, Biological Sciences Institute, Federal University of Minas Gerais, Av. Antônio Carlos 6627, CP 486, 30161-970, Belo Horizonte, MG Brazil
| | - Miriam Martins Chaves
- Biochemistry Laboratory of Aging and Correlated Diseases, Department of Biochemistry and Immunology, Biological Sciences Institute, Federal University of Minas Gerais, Av. Antônio Carlos 6627, CP 486, 30161-970, Belo Horizonte, MG Brazil.
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Gomes RS, Silva MVT, Oliveira MAP, Joosten LAB, Ribeiro-Dias F. Protective immune response mediated by neutrophils in experimental visceral leishmaniasis is enhanced by IL-32γ. Cell Immunol 2021; 371:104449. [PMID: 34784560 DOI: 10.1016/j.cellimm.2021.104449] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Revised: 09/28/2021] [Accepted: 09/29/2021] [Indexed: 11/03/2022]
Abstract
Neutrophils are important cells in protection against microbial infections including visceral leishmaniasis (VL). It is well known that IL-32γ increases the protective T helper 17 cell mediated immune response against Leishmania infantum. Thus, in this study we evaluated whether IL-32 γ can increase the protective role of neutrophils against VL. In comparison with wild type (WT) mice, transgenic mice for human IL-32 γ (IL-32 γ Tg) presented a higher frequency and absolute number of neutrophils in both spleen and liver after the establishment of L. infantum infection. The IL-32 concentrations correlated with neutrophil numbers in the infected tissues. The IL-32 γ -induced recruitment of neutrophils was dependent on IL-17, since inhibition of Th17 T cells generation and IL-17 production with digoxin treatment reversed the effects of IL-32 γ. In murine neutrophils, the presence of IL-32 γ enhanced the phagocytosis of L. infantum via CR3. In addition, murine IL-32 γ Tg neutrophils were able to kill L. infantum due to the increased production of ROS when compared with WT neutrophils. In fact, IL-32 γ Tg mice lost their ability to control infection by L. infantum when neutrophils were depleted. In parallel, treatment of human neutrophils with recombinant IL-32 γ increased phagocytosis and ROS-dependent killing of L. infantum, similarly to murine IL-32 γ Tg neutrophils. The data show that IL-32 γ induces neutrophil recruitment to organs affected by VL and increases phagocytosis and killing of L. infantum by neutrophils. Together, data indicate the pivotal axis IL-32 γ -Th17-neutrophils to control VL.
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Affiliation(s)
- Rodrigo Saar Gomes
- Instituto de Patologia Tropical e Saúde Pública, Universidade Federal de Goiás, Goiânia, Brazil.
| | | | | | - Leo A B Joosten
- Department of Internal Medicine and Radboud Center of Infectious Diseases (RCI), Radboud University Medical Center, Nijmegen, the Netherlands
| | - Fátima Ribeiro-Dias
- Instituto de Patologia Tropical e Saúde Pública, Universidade Federal de Goiás, Goiânia, Brazil.
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3
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Li Z, Wang X, Hong TP, Wang HJ, Gao ZY, Wan M. Advanced glycosylation end products inhibit the proliferation of bone-marrow stromal cells through activating MAPK pathway. Eur J Med Res 2021; 26:94. [PMID: 34407888 PMCID: PMC8371865 DOI: 10.1186/s40001-021-00559-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Accepted: 07/22/2021] [Indexed: 12/30/2022] Open
Abstract
BACKGROUND The purpose of present study was to explore the mechanism of nuclear factor-kappa B (NF-κB), phosphatidylinositol 3-kinase (PI3K)/protein kinase B(PKB/Akt) and mitogen-activated protein kinase (MAPK) signaling pathways after intervention of advanced glycosylation end products (AGEs) on rat bone-marrow stromal cells (BMSCs). METHODS Prepare and identify AGEs. BMSCs were isolated from 16 SD rats and cultured with different concentration of AGEs. Cell viability was detected by cell counting kit-8 (CCK-8). BMSCs were cultured with AGEs (0.25 mg/ml) for 30 min, 12 h, 24 h, 72 h and 120 h. In addition, BMSCs were cultured with AGEs, AGEs + JNK inhibitor and AGEs + P38 inhibitor for 24 h and 48 h, respectively. Western blotting and RT-PCR were used to determine the protein and mRNA expression levels, respectively. RESULTS Cell viability of BMSCs was significantly correlated with concentration and effect time of AGEs (P < 0.05), and the most appropriate concentration was 0.25 mg/ml. AGEs stimulation significantly increased the protein expression levels of NF-κB p65, JNK, p38 (P < 0.05), decreased IκB (P < 0.05), but had no effect on the protein expression of Akt in BMSCs (P > 0.05). At the mRNA level, JNK and p38 inhibitors significantly reduced the levels of NF-κB p65, p38 and JNK, increased IκB (P > 0.05), but had no effect on Akt in BMSCs (P > 0.05). At the protein level, JNK and p38 inhibitors notably decreased the expression of NF-κB p65, p38, p-JNK, P-IκB and JNK (P < 0.001), and increased IκB (P < 0.05). CONCLUSION Advanced glycosylation end products can inhibit the proliferation of bone-marrow stromal cells through activating MAPK pathway.
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Affiliation(s)
- Zheng Li
- Department of Stomatology, Peking University Third Hospital, No. 49 Huayuan North Road, Haidian District, Beijing, 100191, China
| | - Xiao Wang
- Department of Stomatology, Peking University Third Hospital, No. 49 Huayuan North Road, Haidian District, Beijing, 100191, China.
| | - Tian-Pei Hong
- Department of Endocrinology, Peking University Third Hospital, Beijing, 100191, China
| | - Hao-Jie Wang
- Department of Stomatology, Peking University Third Hospital, No. 49 Huayuan North Road, Haidian District, Beijing, 100191, China
| | - Zhan-Yi Gao
- Department of Stomatology, Peking University Third Hospital, No. 49 Huayuan North Road, Haidian District, Beijing, 100191, China
| | - Meng Wan
- Department of Stomatology, Peking University Third Hospital, No. 49 Huayuan North Road, Haidian District, Beijing, 100191, China
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4
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Sauce D, Dong Y, Campillo-Gimenez L, Casulli S, Bayard C, Autran B, Boddaert J, Appay V, Elbim C. Reduced Oxidative Burst by Primed Neutrophils in the Elderly Individuals Is Associated With Increased Levels of the CD16bright/CD62LdimImmunosuppressive Subset. J Gerontol A Biol Sci Med Sci 2016; 72:163-172. [DOI: 10.1093/gerona/glw062] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2015] [Accepted: 03/16/2016] [Indexed: 12/28/2022] Open
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Ferreira AF, França FD, Rossoni JV, Viana PHL, Moraes KCM, Gomes DA, Costa DC, Tagliati CA, Chaves MM. Cyclic adenosine monophosphate protects renal cell lines against amphotericin B toxicity in a PKA-independent manner. Drug Chem Toxicol 2015; 39:28-34. [PMID: 25690107 DOI: 10.3109/01480545.2015.1012210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Amphotericin B is the "gold standard" agent in the management of serious systemic fungal infections. However, this drug can cause nephrotoxicity, which contributes up to 25% of all acute kidney injuries in critically ill patients. Cyclic adenosine monophosphate can protect kidney cells from death due to injury or drug exposure in some cases. Hence, the objective of this work was to evaluate if cAMP could prevent cell death that occurs in renal cell lines subjected to AmB treatment and, if so, to assess the involvement of PKA in the transduction of this signal. Two different renal cell lines (LLC-PK1 and MDCK) were used in this study. MTT and flow cytometry assays showed increased cell survival when cells were exposed to cAMP in a PKA-independent manner, which was confirmed by western blot. This finding suggests that cAMP (db-cAMP) may prevent cell death caused by exposure to AmB. This is the first time this effect has been identified when renal cells are exposed to AmB's nephrotoxic potential.
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Affiliation(s)
- A F Ferreira
- a Departamento de Bioquímica e Imunologia , Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais , Belo Horizonte , MG , Brazil
| | - F D França
- a Departamento de Bioquímica e Imunologia , Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais , Belo Horizonte , MG , Brazil
| | - J V Rossoni
- b Departamento de Ciências Biológicas , Instituto de Ciências Exatas e Biológicas, Universidade Federal de Ouro Preto , Mouro Preto , MG , Brazil
| | - P H L Viana
- a Departamento de Bioquímica e Imunologia , Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais , Belo Horizonte , MG , Brazil
| | - K C M Moraes
- c Departamento de Biologia , Universidade Estadual Paulista "Júlio de Mesquita Filho", Instituto de Biociências , Rio Claro , SP , Brazil , and
| | - D A Gomes
- a Departamento de Bioquímica e Imunologia , Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais , Belo Horizonte , MG , Brazil
| | - D C Costa
- b Departamento de Ciências Biológicas , Instituto de Ciências Exatas e Biológicas, Universidade Federal de Ouro Preto , Mouro Preto , MG , Brazil
| | - C A Tagliati
- d Departamento de Análises Clinicas e Toxicológicas , Faculdade de Farmácia, Universidade Federal de Minas Gerais , Bioquímica, Belo Horizonte , Brazil
| | - M M Chaves
- a Departamento de Bioquímica e Imunologia , Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais , Belo Horizonte , MG , Brazil
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6
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Verschoor CP, Loukov D, Naidoo A, Puchta A, Johnstone J, Millar J, Lelic A, Novakowski KE, Dorrington MG, Loeb M, Bramson JL, Bowdish DME. Circulating TNF and mitochondrial DNA are major determinants of neutrophil phenotype in the advanced-age, frail elderly. Mol Immunol 2015; 65:148-56. [PMID: 25660689 DOI: 10.1016/j.molimm.2015.01.015] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2014] [Revised: 01/12/2015] [Accepted: 01/15/2015] [Indexed: 01/20/2023]
Abstract
Tumor necrosis factor (TNF), a potent inflammatory cytokine, and mitochondrial DNA (mtDNA), a product of inflammation-induced tissue damage, increase with age ("inflammaging") and many chronic diseases. Peripheral blood neutrophils, a critical component of innate immunity, have also been shown to be altered with age, and are exceptionally sensitive to external stimuli. Herein, we describe that the phenotype of neutrophils from the advanced-age, frail elderly (ELD) is determined by levels of circulating TNF and mtDNA. Neutrophils from ELD donors are morphologically immature, and have higher levels of intracellular reactive oxygen species (ROS) and expression of the activation markers CD11b and HLA-DR. The frequency of CD11b(++) neutrophils correlated with plasma TNF, and recombinant TNF elevated neutrophil CD11b ex vivo and in vivo. Furthermore, neutrophils from aged TNF-deficient mice expressed CD11b similar to young counterparts. The frequency of HLA-DR(+) neutrophils, on the other hand, positively correlated with circulating mtDNA, which increased neutrophil HLA-DR expression in a dose-dependent manner ex vivo. Cell-surface TLR-9 expression, however, was unaltered on neutrophils from ELD donors. In summary, we provide novel evidence that products of age-related inflammation modulate neutrophil phenotype in vivo. Given this, anti-inflammatory therapies may prove beneficial in improving neutrophil functionality in the elderly.
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Affiliation(s)
- Chris P Verschoor
- Department of Pathology and Molecular Medicine, McMaster University, Hamilton, Ontario, Canada; Institute for Infectious Diseases Research, McMaster University, Hamilton, Ontario, Canada.
| | - Dessi Loukov
- Department of Pathology and Molecular Medicine, McMaster University, Hamilton, Ontario, Canada; Institute for Infectious Diseases Research, McMaster University, Hamilton, Ontario, Canada.
| | - Avee Naidoo
- Department of Pathology and Molecular Medicine, McMaster University, Hamilton, Ontario, Canada; Institute for Infectious Diseases Research, McMaster University, Hamilton, Ontario, Canada.
| | - Alicja Puchta
- Department of Pathology and Molecular Medicine, McMaster University, Hamilton, Ontario, Canada; Institute for Infectious Diseases Research, McMaster University, Hamilton, Ontario, Canada.
| | - Jennie Johnstone
- Department of Clinical Epidemiology and Biostatistics, McMaster University, Hamilton, Ontario, Canada.
| | - Jamie Millar
- Department of Pathology and Molecular Medicine, McMaster University, Hamilton, Ontario, Canada.
| | - Alina Lelic
- Department of Pathology and Molecular Medicine, McMaster University, Hamilton, Ontario, Canada.
| | - Kyle E Novakowski
- Department of Pathology and Molecular Medicine, McMaster University, Hamilton, Ontario, Canada; Institute for Infectious Diseases Research, McMaster University, Hamilton, Ontario, Canada.
| | - Michael G Dorrington
- Department of Pathology and Molecular Medicine, McMaster University, Hamilton, Ontario, Canada; Institute for Infectious Diseases Research, McMaster University, Hamilton, Ontario, Canada.
| | - Mark Loeb
- Department of Pathology and Molecular Medicine, McMaster University, Hamilton, Ontario, Canada; Department of Clinical Epidemiology and Biostatistics, McMaster University, Hamilton, Ontario, Canada; Department of Medicine, McMaster University, Hamilton, Ontario, Canada; Institute for Infectious Diseases Research, McMaster University, Hamilton, Ontario, Canada.
| | - Jonathan L Bramson
- Department of Pathology and Molecular Medicine, McMaster University, Hamilton, Ontario, Canada; Institute for Infectious Diseases Research, McMaster University, Hamilton, Ontario, Canada.
| | - Dawn M E Bowdish
- Department of Pathology and Molecular Medicine, McMaster University, Hamilton, Ontario, Canada; Institute for Infectious Diseases Research, McMaster University, Hamilton, Ontario, Canada.
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7
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Bloes DA, Kretschmer D, Peschel A. Enemy attraction: bacterial agonists for leukocyte chemotaxis receptors. Nat Rev Microbiol 2014; 13:95-104. [PMID: 25534805 DOI: 10.1038/nrmicro3390] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The innate immune system recognizes conserved microorganism-associated molecular patterns (MAMPs), some of which are sensed by G protein-coupled receptors (GPCRs), and this leads to chemotactic leukocyte influx. Recent studies have indicated that these processes are crucial for host defence and rely on a larger set of chemotactic MAMPs and corresponding GPCRs than was previously thought. Agonists, such as bacterial formyl peptides, enterococcal pheromone peptides, staphylococcal peptide toxins, bacterial fermentation products and the Helicobacter pylori peptide HP(2-20), stimulate specific GPCRs. The importance of leukocyte chemotaxis in host defence is highlighted by the fact that some bacterial pathogens produce chemotaxis inhibitors. How the various chemoattractants, receptors and antagonists shape antibacterial host defence represents an important topic for future research.
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Affiliation(s)
- Dominik Alexander Bloes
- Cellular and Molecular Microbiology Division, Interfaculty Institute of Microbiology and Infection Medicine, University of Tübingen, Tübingen 72076, Germany
| | - Dorothee Kretschmer
- Cellular and Molecular Microbiology Division, Interfaculty Institute of Microbiology and Infection Medicine, University of Tübingen, Tübingen 72076, Germany
| | - Andreas Peschel
- Cellular and Molecular Microbiology Division, Interfaculty Institute of Microbiology and Infection Medicine, University of Tübingen, Tübingen 72076, Germany
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8
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França FD, Ferreira AF, Lara RC, Rossoni JV, Costa DC, Moraes KCM, Gomes DA, Tagliati CA, Chaves MM. Role of protein kinase A signaling pathway in cyclosporine nephrotoxicity. Toxicol Mech Methods 2014; 24:369-76. [DOI: 10.3109/15376516.2014.920447] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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9
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Ren X, Du H, Li Y, Yao X, Huang J, Li Z, Wang W, Li J, Han S, Wang C, Huang K. Age-related activation of MKK/p38/NF-κB signaling pathway in lung: from mouse to human. Exp Gerontol 2014; 57:29-40. [PMID: 24802989 DOI: 10.1016/j.exger.2014.04.017] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2013] [Revised: 04/27/2014] [Accepted: 04/29/2014] [Indexed: 12/20/2022]
Abstract
We and others previously reported that the pro-inflammatory cytokine tumor necrosis factor-α (TNF-α), interleukin-1β (IL-1β) and IL-6 significantly accumulate with age in mouse lung. This is accompanied by elevated phosphorylation of p38. Here, we further investigate whether aging affects activation of p38 signaling and the inflammatory reaction after exposure to lipopolysaccharide (LPS) in the lungs of mice in vivo and humans ex vivo. The data showed that activation of p38 peaked at 0.5h and then rapidly declined in young (2-month-old) mouse lung, after intranasal inhalation challenge with LPS. In contract, activation of p38 peaked at 24h and was sustained longer in aged (20-month-old) mice. As well as altered p38, activations of its upstream activator MKK and downstream substrate NF-κB were also changed in the lungs of aged mice, which corresponded with the absence in the early phase but delayed increases in concentrations of TNF-α, IL-1β and IL-6. Consistent with the above observations in mice, similar patterns of p38 signaling also occurred in human lungs. Compared with younger lungs from adult-middle aged subjects, the activation of p38, MKK and NF-κB, as well as the production of pro-inflammatory cytokines were significantly increased in the lungs of older subjects ex vivo. Exposure of human lung cells to LPS induced rapid activation of p38, MKK and NF-κB in these cells from adult-middle aged subjects, but not older subjects, with increases in the production of the pro-inflammatory cytokines. The LPS-induced rapid activation in the lung cells from adult-middle aged subjects occurred as early as 0.25h after exposure, and then declined. Compared with adult-middle aged subjects, the LPS exposure did not induce marked changes in the early phase, either in the activation of p38, MKK and NF-κB, or in the production of TNF-α, IL-1β or IL-6 in the lung cells from older subjects. In contrast, these changes occurred relatively late, peaked at 16h and were sustained longer in the lungs of older subjects. These data support the hypothesis that the sustained activation of the p38 signaling pathway at baseline and the absence in the early phase but delayed of p38 signaling pathway response to LPS in the elderly may play important roles in increased susceptibility of aged lungs to inflammatory injury.
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Affiliation(s)
- Xiaoxia Ren
- Beijing Key Laboratory of Respiratory and Pulmonary Circulation Disorders, Department of Pulmonary and Critical Care Medicine, Beijing Chao-Yang Hospital, Capital Medical University, Beijing 100020, PR China; Beijing Institute of Respiratory Medicine, Beijing 100020, PR China
| | - Huadong Du
- Department of Thoracic Surgery, Beijing Chao-Yang Hospital, Capital Medical University, Beijing 100020, PR China
| | - Yan Li
- Beijing Key Laboratory of Respiratory and Pulmonary Circulation Disorders, Department of Pulmonary and Critical Care Medicine, Beijing Chao-Yang Hospital, Capital Medical University, Beijing 100020, PR China; Beijing Institute of Respiratory Medicine, Beijing 100020, PR China
| | - Xiujuan Yao
- Beijing Key Laboratory of Respiratory and Pulmonary Circulation Disorders, Department of Pulmonary and Critical Care Medicine, Beijing Chao-Yang Hospital, Capital Medical University, Beijing 100020, PR China; Beijing Institute of Respiratory Medicine, Beijing 100020, PR China
| | - Junmin Huang
- Beijing Key Laboratory of Respiratory and Pulmonary Circulation Disorders, Department of Pulmonary and Critical Care Medicine, Beijing Chao-Yang Hospital, Capital Medical University, Beijing 100020, PR China; Beijing Institute of Respiratory Medicine, Beijing 100020, PR China
| | - Zongli Li
- Beijing Key Laboratory of Respiratory and Pulmonary Circulation Disorders, Department of Pulmonary and Critical Care Medicine, Beijing Chao-Yang Hospital, Capital Medical University, Beijing 100020, PR China; Beijing Institute of Respiratory Medicine, Beijing 100020, PR China
| | - Wei Wang
- Department of Immunology, Capital Medical University, Beijing 100069, PR China
| | - Junfa Li
- Department of Neurobiology, Beijing Institute for Brain Disorders, Capital Medical University, Beijing 100069, PR China
| | - Song Han
- Department of Neurobiology, Beijing Institute for Brain Disorders, Capital Medical University, Beijing 100069, PR China
| | - Chen Wang
- Beijing Key Laboratory of Respiratory and Pulmonary Circulation Disorders, Department of Pulmonary and Critical Care Medicine, Beijing Chao-Yang Hospital, Capital Medical University, Beijing 100020, PR China; Beijing Institute of Respiratory Medicine, Beijing 100020, PR China
| | - Kewu Huang
- Beijing Key Laboratory of Respiratory and Pulmonary Circulation Disorders, Department of Pulmonary and Critical Care Medicine, Beijing Chao-Yang Hospital, Capital Medical University, Beijing 100020, PR China; Beijing Institute of Respiratory Medicine, Beijing 100020, PR China.
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10
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França FD, Ferreira AF, Lara RC, Rossoni JV, Costa DC, Moraes KCM, Tagliati CA, Chaves MM. Alteration in cellular viability, pro-inflammatory cytokines and nitric oxide production in nephrotoxicity generation by Amphotericin B: involvement of PKA pathway signaling. J Appl Toxicol 2013; 34:1285-92. [DOI: 10.1002/jat.2927] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2013] [Revised: 07/26/2013] [Accepted: 08/04/2013] [Indexed: 01/25/2023]
Affiliation(s)
- F. D. França
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas; Universidade Federal de Minas Gerais; Av. Antônio Carlos 6627 30161-970 Belo Horizonte MG Brasil
| | - A. F. Ferreira
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas; Universidade Federal de Minas Gerais; Av. Antônio Carlos 6627 30161-970 Belo Horizonte MG Brasil
| | - R. C. Lara
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas; Universidade Federal de Minas Gerais; Av. Antônio Carlos 6627 30161-970 Belo Horizonte MG Brasil
| | - J. V. Rossoni
- Departamento de Ciências Biológicas, Instituto de Ciências Exatas e Biológicas; Universidade Federal de Ouro Preto; Moro do Cruzeiro 35400-000 Ouro Preto MG Brasil
| | - D. C. Costa
- Departamento de Ciências Biológicas, Instituto de Ciências Exatas e Biológicas; Universidade Federal de Ouro Preto; Moro do Cruzeiro 35400-000 Ouro Preto MG Brasil
| | - K. C. M. Moraes
- Universidade Estadual Paulista ’Júlio de Mesquita Filho‘; Instituto de Biociências, Departamento de Biologia; Av 24-A 1515 13506-900 Rio Claro SP Brasil
| | - C. A. Tagliati
- Departamento de Análises Clínicas e Toxicológicas; Faculdade de Farmácia Universidade Federal de Minas Gerais; Av. Antônio Carlos 6627 31270-901 Belo Horizonte MG Brasil
| | - M. M. Chaves
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas; Universidade Federal de Minas Gerais; Av. Antônio Carlos 6627 30161-970 Belo Horizonte MG Brasil
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Appukuttan A, Kasseckert SA, Kumar S, Reusch HP, Ladilov Y. Oxysterol-induced apoptosis of smooth muscle cells is under the control of a soluble adenylyl cyclase. Cardiovasc Res 2013; 99:734-42. [PMID: 23729662 DOI: 10.1093/cvr/cvt137] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
AIMS Apoptosis of vascular smooth muscle cells (VSMC) in advanced atherosclerotic plaques is an important cause of plaque instability. Oxysterols have been suggested as important inducers of apoptosis in VSMC, but the precise mechanism is still poorly understood. Here we aimed to analyse the role of the soluble adenylyl cyclase (sAC). METHODS AND RESULTS VSMC derived from rat aorta were treated with either 25-hydroxycholesterol or 7-ketocholesterol for 24 h. Apoptosis was detected by TUNEL staining and caspases cleavage. Oxysterols treatment led to the activation of the mitochondrial pathway of apoptosis (cytochrome c release and caspase-9 cleavage) and mitochondrial ROS formation, which were suppressed by the pharmacological inhibition or knockdown of sAC. Scavenging ROS with N-acetyl-l-cysteine prevented oxysterol-induced apoptosis. Analyses of the downstream pathway suggest that protein kinase A (PKA)-dependent phosphorylation and the mitochondrial translocation of the pro-apoptotic protein Bax is a key link between sAC and oxysterol-induced ROS formation and apoptosis. To distinguish between intra-mitochondrial and extra-mitochondrial/cytosolic sAC pools, sAC was overexpressed in mitochondria or in the cytosol. sAC expression in the cytosol, but not in mitochondria, significantly promoted apoptosis and ROS formation during oxysterol treatment. CONCLUSION These results suggest that the sAC/PKA axis plays a key role in the oxysterol-induced apoptosis of VSMC by controlling mitochondrial Bax translocation and ROS formation and that cytosolic sAC, rather than the mitochondrial pool, is involved in the apoptotic mechanism.
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12
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Park AM, Kudo M, Hagiwara S, Tabuchi M, Watanabe T, Munakata H, Sakurai T. p38MAPK suppresses chronic pancreatitis by regulating HSP27 and BAD expression. Free Radic Biol Med 2012; 52:2284-91. [PMID: 22549003 DOI: 10.1016/j.freeradbiomed.2012.03.010] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/02/2011] [Revised: 02/29/2012] [Accepted: 03/06/2012] [Indexed: 12/28/2022]
Abstract
Mitogen-activated protein kinases (MAPKs) are ubiquitous proteins that function in both normal and stress-related pathophysiological states of the cell. This study aimed to analyze the importance of p38MAPK in pancreatic injury using WBN/Kob rats with spontaneous chronic pancreatitis. Male WBN/Kob rats were injected with the p38MAPK inhibitor SB203580, starting at the age of 4 weeks, and sacrificed 6 weeks later. Compared with vehicle-treated rats, p38 inhibitor-treated rats exhibited a significant increase in pancreatic cell death and inflammation as assessed by histologic examination and myeloperoxidase activity, respectively. p38 inhibition decreased the expression of heat shock protein 27 (HSP27), an antioxidant protein, and enhanced accumulation of reactive oxygen species (ROS). In addition, the proapoptotic protein BAD was increased in the pancreas of rats treated with p38 inhibitor. In a pancreatic cell line (PANC-1), HSP27 knockdown augmented reactive oxygen species accumulation and cell death induced by tumor necrosis factor-α plus actinomycin D. In conclusion, p38MAPK suppresses chronic pancreatitis by upregulating HSP27 expression and downregulating BAD expression.
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Affiliation(s)
- Ah-Mee Park
- Department of Biochemistry, Kinki University, Faculty of Medicine, Osaka 589-8511, Japan
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Ju X, Mallet RT, Downey HF, Metzger DB, Jung ME. Intermittent hypoxia conditioning protects mitochondrial cytochrome c oxidase of rat cerebellum from ethanol withdrawal stress. J Appl Physiol (1985) 2012; 112:1706-14. [PMID: 22403345 PMCID: PMC3365408 DOI: 10.1152/japplphysiol.01428.2011] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2011] [Accepted: 03/05/2012] [Indexed: 12/17/2022] Open
Abstract
Intermittent hypoxia (IH) conditioning minimizes neurocognitive impairment and stabilizes brain mitochondrial integrity during ethanol withdrawal (EW) in rats, but the mitoprotective mechanism is unclear. We investigated whether IH conditioning protects a key mitochondrial enzyme, cytochrome c oxidase (COX), from EW stress by inhibiting mitochondrially directed apoptotic pathways involving cytochrome c, Bax, or phosphor-P38 (pP38). Male rats completed two cycles of a 4-wk ethanol diet (6.5%) and 3 wk of EW. An IH program consisting of 5-10 bouts of 5-8 min of mild hypoxia (9.5-10% inspired O(2)) and 4 min of reoxygenation for 20 consecutive days began 3 days before the first EW period. For some animals, vitamin E replaced IH conditioning to test the contributions of antioxidant mechanisms to IH's mitoprotection. During the second EW, cerebellar-related motor function was evaluated by measuring latency of fall from a rotating rod (Rotarod test). After the second EW, COX activity in cerebellar mitochondria was measured by spectrophotometry, and COX, cytochrome c, Bax, and pP38 content were analyzed by immunoblot. Mitochondrial protein oxidation was detected by measuring carbonyl contents and by immunochemistry. Earlier IH conditioning prevented motor impairment, COX inactivation, depletion of COX subunit 4, protein carbonylation, and P38 phosphorylation during EW. IH did not prevent cytochrome c depletion during EW, and Bax content was unaffected by EW ± IH. Vitamin E treatment recapitulated IH protection of COX, and P38 inhibition attenuated protein oxidation during EW. Thus IH protects COX and improves cerebellar function during EW by limiting P38-dependent oxidative damage.
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Affiliation(s)
- Xiaohua Ju
- Department of Pharmacology and Neuroscience, University of North Texas Health Science Center, Fort Worth, Texas 76107-2699, USA
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