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Cuevas-López B, Romero-Ramirez EI, García-Arroyo FE, Tapia E, León-Contreras JC, Silva-Palacios A, Roldán FJ, Campos ONM, Hernandez-Esquivel L, Marín-Hernández A, Gonzaga-Sánchez JG, Hernández-Pando R, Pedraza-Chaverri J, Sánchez-Lozada LG, Aparicio-Trejo OE. NAC Pre-Administration Prevents Cardiac Mitochondrial Bioenergetics, Dynamics, Biogenesis, and Redox Alteration in Folic Acid-AKI-Induced Cardio-Renal Syndrome Type 3. Antioxidants (Basel) 2023; 12:1592. [PMID: 37627587 PMCID: PMC10451243 DOI: 10.3390/antiox12081592] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Revised: 08/05/2023] [Accepted: 08/08/2023] [Indexed: 08/27/2023] Open
Abstract
The incidence of kidney disease is increasing worldwide. Acute kidney injury (AKI) can strongly favor cardio-renal syndrome (CRS) type 3 development. However, the mechanism involved in CRS development is not entirely understood. In this sense, mitochondrial impairment in both organs has become a central axis in CRS physiopathology. This study aimed to elucidate the molecular mechanisms associated with cardiac mitochondrial impairment and its role in CRS development in the folic acid-induced AKI (FA-AKI) model. Our results showed that 48 h after FA-AKI, the administration of N-acetyl-cysteine (NAC), a mitochondrial glutathione regulator, prevented the early increase in inflammatory and cell death markers and oxidative stress in the heart. This was associated with the ability of NAC to protect heart mitochondrial bioenergetics, principally oxidative phosphorylation (OXPHOS) and membrane potential, through complex I activity and the preservation of glutathione balance, thus preventing mitochondrial dynamics shifting to fission and the decreases in mitochondrial biogenesis and mass. Our data show, for the first time, that mitochondrial bioenergetics impairment plays a critical role in the mechanism that leads to heart damage. Furthermore, NAC heart mitochondrial preservation during an AKI event can be a valuable strategy to prevent CRS type 3 development.
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Affiliation(s)
- Belén Cuevas-López
- Department of Cardio-Renal Physiology, National Institute of Cardiology Ignacio Chávez, Mexico City 14080, Mexico; (B.C.-L.); (E.I.R.-R.); (F.E.G.-A.); (E.T.); (J.G.G.-S.); (L.G.S.-L.)
| | - Edgar Ignacio Romero-Ramirez
- Department of Cardio-Renal Physiology, National Institute of Cardiology Ignacio Chávez, Mexico City 14080, Mexico; (B.C.-L.); (E.I.R.-R.); (F.E.G.-A.); (E.T.); (J.G.G.-S.); (L.G.S.-L.)
| | - Fernando E. García-Arroyo
- Department of Cardio-Renal Physiology, National Institute of Cardiology Ignacio Chávez, Mexico City 14080, Mexico; (B.C.-L.); (E.I.R.-R.); (F.E.G.-A.); (E.T.); (J.G.G.-S.); (L.G.S.-L.)
| | - Edilia Tapia
- Department of Cardio-Renal Physiology, National Institute of Cardiology Ignacio Chávez, Mexico City 14080, Mexico; (B.C.-L.); (E.I.R.-R.); (F.E.G.-A.); (E.T.); (J.G.G.-S.); (L.G.S.-L.)
| | - Juan Carlos León-Contreras
- Experimental Pathology Section, National Institute of Medical Sciences and Nutrition “Salvador Zubirán”, Mexico City 14000, Mexico; (J.C.L.-C.); (R.H.-P.)
| | - Alejandro Silva-Palacios
- Department of Cardiovascular Biomedicine, National Institute of Cardiology Ignacio Chávez, Mexico City 14080, Mexico;
| | - Francisco-Javier Roldán
- Outpatient Department, National Institute of Cardiology Ignacio Chávez, Mexico City 14080, Mexico;
| | - Omar Noel Medina Campos
- Department of Biology, Faculty of Chemistry, National Autonomous University of Mexico, Mexico City 04510, Mexico; (O.N.M.C.); (J.P.-C.)
| | - Luz Hernandez-Esquivel
- Department of Biochemistry, National Institute of Cardiology Ignacio Chávez, Mexico City 14080, Mexico; (L.H.-E.); (A.M.-H.)
| | - Alvaro Marín-Hernández
- Department of Biochemistry, National Institute of Cardiology Ignacio Chávez, Mexico City 14080, Mexico; (L.H.-E.); (A.M.-H.)
| | - José Guillermo Gonzaga-Sánchez
- Department of Cardio-Renal Physiology, National Institute of Cardiology Ignacio Chávez, Mexico City 14080, Mexico; (B.C.-L.); (E.I.R.-R.); (F.E.G.-A.); (E.T.); (J.G.G.-S.); (L.G.S.-L.)
| | - Rogelio Hernández-Pando
- Experimental Pathology Section, National Institute of Medical Sciences and Nutrition “Salvador Zubirán”, Mexico City 14000, Mexico; (J.C.L.-C.); (R.H.-P.)
| | - José Pedraza-Chaverri
- Department of Biology, Faculty of Chemistry, National Autonomous University of Mexico, Mexico City 04510, Mexico; (O.N.M.C.); (J.P.-C.)
| | - Laura Gabriela Sánchez-Lozada
- Department of Cardio-Renal Physiology, National Institute of Cardiology Ignacio Chávez, Mexico City 14080, Mexico; (B.C.-L.); (E.I.R.-R.); (F.E.G.-A.); (E.T.); (J.G.G.-S.); (L.G.S.-L.)
| | - Omar Emiliano Aparicio-Trejo
- Department of Cardio-Renal Physiology, National Institute of Cardiology Ignacio Chávez, Mexico City 14080, Mexico; (B.C.-L.); (E.I.R.-R.); (F.E.G.-A.); (E.T.); (J.G.G.-S.); (L.G.S.-L.)
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Cruz-Gregorio A, Aranda-Rivera AK, Aparicio-Trejo OE, Medina-Campos ON, Sciutto E, Fragoso G, Pedraza-Chaverri J. α-Mangostin induces oxidative damage, mitochondrial dysfunction, and apoptosis in a triple-negative breast cancer model. Phytother Res 2023; 37:3394-3407. [PMID: 37012651 DOI: 10.1002/ptr.7812] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2022] [Revised: 02/21/2023] [Accepted: 03/17/2023] [Indexed: 04/05/2023]
Abstract
Triple-negative breast cancer (TNBC) does not express estrogen receptor, progesterone receptor, and human epidermal growth factor receptor; therefore, TNBC lacks targeted therapy, and chemotherapy is the only available treatment for this illness but causes side effects. A putative strategy for the treatment of TNBC could be the use of the polyphenols such as α-Mangostin (α-M), which has shown anticancerogenic effects in different cancer models and can modulate the inflammatory and prooxidant state in several pathological models. The redox state, oxidative stress (OS), and oxidative damage are highly related to cancer development and its treatment. Thus, this study aimed to evaluate the effects of α-M on redox state, mitochondrial metabolism, and apoptosis in 4T1 mammary carcinoma cells. We found that α-M decreases both protein levels and enzymatic activity of catalase, and increases reactive oxygen species, oxidized proteins and glutathione disulfide, which demonstrates that α-M induces oxidative damage. We also found that α-M promotes mitochondrial dysfunction by abating basal respiration, the respiration ligated to oxidative phosphorylation (OXPHOS), and the rate control of whole 4T1 cells. Additionally, α-M also decreases the levels of OXPHOS subunits of mitochondrial complexes I, II, III, and adenosine triphosphate synthase, the activity of mitochondrial complex I as well as the levels of peroxisome proliferator-activated receptor-gamma co-activator 1α, showing a mitochondrial mass reduction. Then, oxidative damage and mitochondrial dysfunction induced by α-M induce apoptosis of 4T1 cells, which is evidenced by B cell lymphoma 2 decrease and caspase 3 cleavage. Taken together, our results suggest that α-M induces OS and mitochondrial dysfunction, resulting in 4T1 cell death through apoptotic mechanisms.
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Affiliation(s)
- Alfredo Cruz-Gregorio
- Departamento de Biomedicina Cardiovascular, Instituto Nacional de Cardiología "Ignacio Chávez", CDMX, Mexico
- Laboratorio F-315, Departamento de Biología, Facultad de Química, Universidad Nacional Autónoma de México, CDMX, Mexico
| | - Ana Karina Aranda-Rivera
- Laboratorio F-315, Departamento de Biología, Facultad de Química, Universidad Nacional Autónoma de México, CDMX, Mexico
| | | | - Omar Noel Medina-Campos
- Laboratorio F-315, Departamento de Biología, Facultad de Química, Universidad Nacional Autónoma de México, CDMX, Mexico
| | - Edda Sciutto
- Departamento de Inmunología, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, CDMX, Mexico
| | - Gladis Fragoso
- Departamento de Inmunología, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, CDMX, Mexico
| | - José Pedraza-Chaverri
- Laboratorio F-315, Departamento de Biología, Facultad de Química, Universidad Nacional Autónoma de México, CDMX, Mexico
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John OD, Mushunje AT, Surugau N, Guad RM. The metabolic and molecular mechanisms of α‑mangostin in cardiometabolic disorders (Review). Int J Mol Med 2022; 50:120. [PMID: 35904170 PMCID: PMC9354700 DOI: 10.3892/ijmm.2022.5176] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Accepted: 07/08/2022] [Indexed: 12/03/2022] Open
Abstract
α-mangostin is a xanthone predominantly encountered in Garcinia mangostana. Extensive research has been carried out concerning the effects of this compound on various diseases, including obesity, cancer and metabolic disorders. The present review suggests that α-mangostin exerts promising anti-obesity, hepatoprotective, antidiabetic, cardioprotective, antioxidant and anti-inflammatory effects on various pathways in cardiometabolic diseases. The anti-obesity effects of α-mangostin include the reduction of body weight and adipose tissue size, the increase in fatty acid oxidation, the activation of hepatic AMP-activated protein kinase and Sirtuin-1, and the reduction of peroxisome proliferator-activated receptor γ expression. Hepatoprotective effects have been revealed, due to reduced fibrosis through transforming growth factor-β 1 pathways, reduced apoptosis and steatosis through reduced sterol regulatory-element binding proteins expression. The antidiabetic effects include decreased fasting blood glucose levels, improved insulin sensitivity and the increased expression of GLUT transporters in various tissues. Cardioprotection is exhibited through the restoration of cardiac functions and structure, improved mitochondrial functions, the promotion of M2 macrophage populations, reduced endothelial and cardiomyocyte apoptosis and fibrosis, and reduced acid sphingomyelinase activity and ceramide depositions. The antioxidant effects of α-mangostin are mainly related to the modulation of antioxidant enzymes, the reduction of oxidative stress markers, the reduction of oxidative damage through a reduction in Sirtuin 3 expression mediated by phosphoinositide 3-kinase/protein kinase B/peroxisome proliferator-activated receptor-γ coactivator-1α signaling pathways, and to the increase in Nuclear factor-erythroid factor 2-related factor 2 and heme oxygenase-1 expression levels. The anti-inflammatory effects of α-mangostin include its modulation of nuclear factor-κB related pathways, the suppression of mitogen-activated protein kinase activation, increased macrophage polarization to M2, reduced inflammasome occurrence, increased Sirtuin 1 and 3 expression, the reduced expression of inducible nitric oxide synthase, the production of nitric oxide and prostaglandin E2, the reduced expression of Toll-like receptors and reduced proinflammatory cytokine levels. These effects demonstrate that α-mangostin may possess the properties required for a suitable candidate compound for the management of cardiometabolic diseases.
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Affiliation(s)
- Oliver Dean John
- Faculty of Science and Natural Resources, Universiti Malaysia Sabah, 88400 Kota Kinabalu, Sabah, Malaysia
| | - Annals Tatenda Mushunje
- Faculty of Science, Asia‑Pacific International University, Muak Lek, Saraburi 18180, Thailand
| | - Noumie Surugau
- Faculty of Science and Natural Resources, Universiti Malaysia Sabah, 88400 Kota Kinabalu, Sabah, Malaysia
| | - Rhanye Mac Guad
- Faculty of Medicine and Health Sciences, Universiti Malaysia Sabah, 88400 Kota Kinabalu, Sabah, Malaysia
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Ortega-Lozano AJ, Gómez-Caudillo L, Briones-Herrera A, Aparicio-Trejo OE, Pedraza-Chaverri J. Characterization of Mitochondrial Proteome and Function in Luminal A and Basal-like Breast Cancer Subtypes Reveals Alteration in Mitochondrial Dynamics and Bioenergetics Relevant to Their Diagnosis. Biomolecules 2022; 12:379. [PMID: 35327574 PMCID: PMC8945677 DOI: 10.3390/biom12030379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2022] [Revised: 02/19/2022] [Accepted: 02/24/2022] [Indexed: 12/24/2022] Open
Abstract
Breast cancer (BC) is the most prevalent cancer and the one with the highest mortality among women worldwide. Although the molecular classification of BC has been a helpful tool for diagnosing and predicting the treatment of BC, developments are still being made to improve the diagnosis and find new therapeutic targets. Mitochondrial dysfunction is a crucial feature of cancer, which can be associated with cancer aggressiveness. Although the importance of mitochondrial dynamics in cancer is well recognized, its involvement in the mitochondrial function and bioenergetics context in BC molecular subtypes has been scantly explored. In this study, we combined mitochondrial function and bioenergetics experiments in MCF7 and MDA-MB-231 cell lines with statistical and bioinformatics analyses of the mitochondrial proteome of luminal A and basal-like tumors. We demonstrate that basal-like tumors exhibit a vicious cycle between mitochondrial fusion and fission; impaired but not completely inactive mitochondrial function; and the Warburg effect, associated with decreased oxidative phosphorylation (OXPHOS) complexes I and III. Together with the results obtained in the cell lines and the mitochondrial proteome analysis, two mitochondrial signatures were proposed: one signature reflecting alterations in mitochondrial functions and a second signature exclusively of OXPHOS, which allow us to distinguish between luminal A and basal-like tumors.
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Affiliation(s)
- Ariadna Jazmín Ortega-Lozano
- Department of Biology, Faculty of Chemistry, National Autonomous University of Mexico (UNAM), Mexico City 04510, Mexico; (A.J.O.-L.); (L.G.-C.); (A.B.-H.)
| | - Leopoldo Gómez-Caudillo
- Department of Biology, Faculty of Chemistry, National Autonomous University of Mexico (UNAM), Mexico City 04510, Mexico; (A.J.O.-L.); (L.G.-C.); (A.B.-H.)
| | - Alfredo Briones-Herrera
- Department of Biology, Faculty of Chemistry, National Autonomous University of Mexico (UNAM), Mexico City 04510, Mexico; (A.J.O.-L.); (L.G.-C.); (A.B.-H.)
| | - Omar Emiliano Aparicio-Trejo
- Department of Cardio-Renal Physiopathology, National Institute of Cardiology “Ignacio Chávez”, Mexico City 14080, Mexico;
| | - José Pedraza-Chaverri
- Department of Biology, Faculty of Chemistry, National Autonomous University of Mexico (UNAM), Mexico City 04510, Mexico; (A.J.O.-L.); (L.G.-C.); (A.B.-H.)
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Aranda-Rivera AK, Srivastava A, Cruz-Gregorio A, Pedraza-Chaverri J, Mulay SR, Scholze A. Involvement of Inflammasome Components in Kidney Disease. Antioxidants (Basel) 2022; 11:antiox11020246. [PMID: 35204131 PMCID: PMC8868482 DOI: 10.3390/antiox11020246] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Revised: 01/21/2022] [Accepted: 01/22/2022] [Indexed: 02/01/2023] Open
Abstract
Inflammasomes are multiprotein complexes with an important role in the innate immune response. Canonical activation of inflammasomes results in caspase-1 activation and maturation of cytokines interleukin-1β and -18. These cytokines can elicit their effects through receptor activation, both locally within a certain tissue and systemically. Animal models of kidney diseases have shown inflammasome involvement in inflammation, pyroptosis and fibrosis. In particular, the inflammasome component nucleotide-binding domain-like receptor family pyrin domain containing 3 (NLRP3) and related canonical mechanisms have been investigated. However, it has become increasingly clear that other inflammasome components are also of importance in kidney disease. Moreover, it is becoming obvious that the range of molecular interaction partners of inflammasome components in kidney diseases is wide. This review provides insights into these current areas of research, with special emphasis on the interaction of inflammasome components and redox signalling, endoplasmic reticulum stress, and mitochondrial function. We present our findings separately for acute kidney injury and chronic kidney disease. As we strictly divided the results into preclinical and clinical data, this review enables comparison of results from those complementary research specialities. However, it also reveals that knowledge gaps exist, especially in clinical acute kidney injury inflammasome research. Furthermore, patient comorbidities and treatments seem important drivers of inflammasome component alterations in human kidney disease.
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Affiliation(s)
- Ana Karina Aranda-Rivera
- Laboratory F-315, Department of Biology, Faculty of Chemistry, National Autonomous University of Mexico, Mexico City 04510, Mexico; (A.K.A.-R.); (A.C.-G.); (J.P.-C.)
| | - Anjali Srivastava
- Division of Pharmacology, CSIR-Central Drug Research Institute, Lucknow 226031, India; (A.S.); (S.R.M.)
| | - Alfredo Cruz-Gregorio
- Laboratory F-315, Department of Biology, Faculty of Chemistry, National Autonomous University of Mexico, Mexico City 04510, Mexico; (A.K.A.-R.); (A.C.-G.); (J.P.-C.)
| | - José Pedraza-Chaverri
- Laboratory F-315, Department of Biology, Faculty of Chemistry, National Autonomous University of Mexico, Mexico City 04510, Mexico; (A.K.A.-R.); (A.C.-G.); (J.P.-C.)
| | - Shrikant R. Mulay
- Division of Pharmacology, CSIR-Central Drug Research Institute, Lucknow 226031, India; (A.S.); (S.R.M.)
| | - Alexandra Scholze
- Department of Nephrology, Odense University Hospital, Odense, Denmark, and Institute of Clinical Research, University of Southern Denmark, 5000 Odense C, Denmark
- Correspondence:
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Hu X, Ma Z, Wen L, Li S, Dong Z. Autophagy in Cisplatin Nephrotoxicity during Cancer Therapy. Cancers (Basel) 2021; 13:cancers13225618. [PMID: 34830772 PMCID: PMC8616020 DOI: 10.3390/cancers13225618] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Revised: 10/23/2021] [Accepted: 11/04/2021] [Indexed: 12/12/2022] Open
Abstract
Simple Summary Cisplatin is a broadly used chemotherapy drug, but its use and efficacy are limited by its nephrotoxicity. Autophagy protects against kidney injury during cisplatin exposure but may reduce the efficacy of chemotherapy by protecting cancer cells. In this review, we describe the role and regulation of autophagy in cisplatin-induced nephrotoxicity and discuss the therapeutic advances and challenges of targeting autophagy in chemotherapy. Abstract Cisplatin is a widely used chemotherapeutic agent but its clinical use is often limited by nephrotoxicity. Autophagy is a lysosomal degradation pathway that removes protein aggregates and damaged or dysfunctional cellular organelles for maintaining cell homeostasis. Upon cisplatin exposure, autophagy is rapidly activated in renal tubule cells to protect against acute cisplatin nephrotoxicity. Mechanistically, the protective effect is mainly related to the clearance of damaged mitochondria via mitophagy. The role and regulation of autophagy in chronic kidney problems after cisplatin treatment are currently unclear, despite the significance of research in this area. In cancers, autophagy may prevent tumorigenesis, but autophagy may reduce the efficacy of chemotherapy by protecting cancer cells. Future research should focus on developing drugs that enhance the anti-tumor effects of cisplatin while protecting kidneys during cisplatin chemotherapy.
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Affiliation(s)
- Xiaoru Hu
- Hunan Key Laboratory of Kidney Disease and Blood Purification, Department of Nephrology, The Second Xiangya Hospital of Central South University, Changsha 410011, China; (X.H.); (L.W.); (S.L.)
- Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA;
- Charlie Norwood VA Medical Center, Augusta, GA 30912, USA
| | - Zhengwei Ma
- Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA;
- Charlie Norwood VA Medical Center, Augusta, GA 30912, USA
| | - Lu Wen
- Hunan Key Laboratory of Kidney Disease and Blood Purification, Department of Nephrology, The Second Xiangya Hospital of Central South University, Changsha 410011, China; (X.H.); (L.W.); (S.L.)
- Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA;
- Charlie Norwood VA Medical Center, Augusta, GA 30912, USA
| | - Siyao Li
- Hunan Key Laboratory of Kidney Disease and Blood Purification, Department of Nephrology, The Second Xiangya Hospital of Central South University, Changsha 410011, China; (X.H.); (L.W.); (S.L.)
- Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA;
- Charlie Norwood VA Medical Center, Augusta, GA 30912, USA
| | - Zheng Dong
- Hunan Key Laboratory of Kidney Disease and Blood Purification, Department of Nephrology, The Second Xiangya Hospital of Central South University, Changsha 410011, China; (X.H.); (L.W.); (S.L.)
- Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA;
- Charlie Norwood VA Medical Center, Augusta, GA 30912, USA
- Correspondence: ; Tel.: +1-706-721-2825; Fax: +1-706-721-6120
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Aranda-Rivera AK, Cruz-Gregorio A, Aparicio-Trejo OE, Ortega-Lozano AJ, Pedraza-Chaverri J. Redox signaling pathways in unilateral ureteral obstruction (UUO)-induced renal fibrosis. Free Radic Biol Med 2021; 172:65-81. [PMID: 34077780 DOI: 10.1016/j.freeradbiomed.2021.05.034] [Citation(s) in RCA: 44] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Revised: 05/14/2021] [Accepted: 05/25/2021] [Indexed: 02/07/2023]
Abstract
Unilateral ureteral obstruction (UUO) is an experimental rodent model that mimics renal fibrosis associated with obstructive nephropathy in an accelerated manner. After UUO, the activation of the renin-angiotensin system (RAS), nicotinamide adenine dinucleotide phosphate (NADPH) oxidases (NOXs) and mitochondrial dysfunction lead to reactive oxygen species (ROS) overproduction in the kidney. ROS are secondary messengers able to induce post-translational modifications (PTMs) in redox-sensitive proteins, which activate or deactivate signaling pathways. Therefore, in UUO, it has been proposed that ROS overproduction causes changes in said pathways promoting inflammation, oxidative stress, and apoptosis that contribute to fibrosis development. Furthermore, mitochondrial metabolism impairment has been associated with UUO, contributing to renal damage in this model. Although ROS production and oxidative stress have been studied in UUO, the development of renal fibrosis associated with redox signaling pathways has not been addressed. This review focuses on the current information about the activation and deactivation of signaling pathways sensitive to a redox state and their effect on mitochondrial metabolism in the fibrosis development in the UUO model.
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Affiliation(s)
- Ana Karina Aranda-Rivera
- Laboratorio F-315, Departamento de Biología, Facultad de Química, Universidad Nacional Autónoma de México, 04510, Ciudad de México, Mexico; Posgrado en Ciencias Biológicas, Universidad Nacional Autónoma de México, Ciudad Universitaria, Laboratorio F-225, Ciudad de México, 04510, Mexico.
| | - Alfredo Cruz-Gregorio
- Laboratorio F-225, Departamento de Biología, Facultad de Química, Universidad Nacional Autónoma de México, 04510, Ciudad de México, Mexico.
| | - Omar Emiliano Aparicio-Trejo
- Laboratorio F-315, Departamento de Biología, Facultad de Química, Universidad Nacional Autónoma de México, 04510, Ciudad de México, Mexico.
| | - Ariadna Jazmín Ortega-Lozano
- Laboratorio F-315, Departamento de Biología, Facultad de Química, Universidad Nacional Autónoma de México, 04510, Ciudad de México, Mexico.
| | - José Pedraza-Chaverri
- Laboratorio F-315, Departamento de Biología, Facultad de Química, Universidad Nacional Autónoma de México, 04510, Ciudad de México, Mexico.
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8
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Mitochondrial Redox Signaling and Oxidative Stress in Kidney Diseases. Biomolecules 2021; 11:biom11081144. [PMID: 34439810 PMCID: PMC8391472 DOI: 10.3390/biom11081144] [Citation(s) in RCA: 74] [Impact Index Per Article: 24.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Revised: 07/31/2021] [Accepted: 08/01/2021] [Indexed: 12/12/2022] Open
Abstract
Mitochondria are essential organelles in physiology and kidney diseases, because they produce cellular energy required to perform their function. During mitochondrial metabolism, reactive oxygen species (ROS) are produced. ROS function as secondary messengers, inducing redox-sensitive post-translational modifications (PTM) in proteins and activating or deactivating different cell signaling pathways. However, in kidney diseases, ROS overproduction causes oxidative stress (OS), inducing mitochondrial dysfunction and altering its metabolism and dynamics. The latter processes are closely related to changes in the cell redox-sensitive signaling pathways, causing inflammation and apoptosis cell death. Although mitochondrial metabolism, ROS production, and OS have been studied in kidney diseases, the role of redox signaling pathways in mitochondria has not been addressed. This review focuses on altering the metabolism and dynamics of mitochondria through the dysregulation of redox-sensitive signaling pathways in kidney diseases.
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Prieto-Carrasco R, García-Arroyo FE, Aparicio-Trejo OE, Rojas-Morales P, León-Contreras JC, Hernández-Pando R, Sánchez-Lozada LG, Tapia E, Pedraza-Chaverri J. Progressive Reduction in Mitochondrial Mass Is Triggered by Alterations in Mitochondrial Biogenesis and Dynamics in Chronic Kidney Disease Induced by 5/6 Nephrectomy. BIOLOGY 2021; 10:349. [PMID: 33919054 PMCID: PMC8143166 DOI: 10.3390/biology10050349] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Revised: 04/17/2021] [Accepted: 04/19/2021] [Indexed: 12/17/2022]
Abstract
The five-sixth nephrectomy (5/6Nx) model is widely used to study the mechanisms involved in chronic kidney disease (CKD) progression. Mitochondrial impairment is a critical mechanism that favors CKD progression. However, until now, there are no temporal studies of the change in mitochondrial biogenesis and dynamics that allow determining the role of these processes in mitochondrial impairment and renal damage progression in the 5/6Nx model. In this work, we determined the changes in mitochondrial biogenesis and dynamics markers in remnant renal mass from days 2 to 28 after 5/6Nx. Our results show a progressive reduction in mitochondrial biogenesis triggered by reducing two principal regulators of mitochondrial protein expression, the peroxisome proliferator-activated receptor-gamma coactivator 1-alpha and the peroxisome proliferator-activated receptor alpha. Furthermore, the reduction in mitochondrial biogenesis proteins strongly correlates with the increase in renal damage markers. Additionally, we found a slow and gradual change in mitochondrial dynamics from fusion to fission, favoring mitochondrial fragmentation at later stages after 5/6Nx. Together, our results suggest that 5/6Nx induces the progressive reduction in mitochondrial mass over time via the decrease in mitochondrial biogenesis factors and a slow shift from mitochondrial fission to fusion; both mechanisms favor CKD progression in the remnant renal mass.
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Affiliation(s)
- Rodrigo Prieto-Carrasco
- Department of Biology, Faculty of Chemistry, National Autonomous University of Mexico (UNAM), Mexico City 04510, Mexico; (R.P.-C.); (O.E.A.-T.); (P.R.-M.)
- Department of Cardio-Renal Pathophysiology, National Institute of Cardiology “Ignacio Chávez”, Mexico City 14080, Mexico; (F.E.G.-A.); (L.G.S.-L.); (E.T.)
| | - Fernando E. García-Arroyo
- Department of Cardio-Renal Pathophysiology, National Institute of Cardiology “Ignacio Chávez”, Mexico City 14080, Mexico; (F.E.G.-A.); (L.G.S.-L.); (E.T.)
| | - Omar Emiliano Aparicio-Trejo
- Department of Biology, Faculty of Chemistry, National Autonomous University of Mexico (UNAM), Mexico City 04510, Mexico; (R.P.-C.); (O.E.A.-T.); (P.R.-M.)
- Department of Cardio-Renal Pathophysiology, National Institute of Cardiology “Ignacio Chávez”, Mexico City 14080, Mexico; (F.E.G.-A.); (L.G.S.-L.); (E.T.)
| | - Pedro Rojas-Morales
- Department of Biology, Faculty of Chemistry, National Autonomous University of Mexico (UNAM), Mexico City 04510, Mexico; (R.P.-C.); (O.E.A.-T.); (P.R.-M.)
- Department of Cardio-Renal Pathophysiology, National Institute of Cardiology “Ignacio Chávez”, Mexico City 14080, Mexico; (F.E.G.-A.); (L.G.S.-L.); (E.T.)
| | - Juan Carlos León-Contreras
- Experimental Pathology Section, National Institute of Medical Sciences and Nutrition “Salvador Zubirán”, Mexico City 14000, Mexico; (J.C.L.-C.); (R.H.-P.)
| | - Rogelio Hernández-Pando
- Experimental Pathology Section, National Institute of Medical Sciences and Nutrition “Salvador Zubirán”, Mexico City 14000, Mexico; (J.C.L.-C.); (R.H.-P.)
| | - Laura Gabriela Sánchez-Lozada
- Department of Cardio-Renal Pathophysiology, National Institute of Cardiology “Ignacio Chávez”, Mexico City 14080, Mexico; (F.E.G.-A.); (L.G.S.-L.); (E.T.)
| | - Edilia Tapia
- Department of Cardio-Renal Pathophysiology, National Institute of Cardiology “Ignacio Chávez”, Mexico City 14080, Mexico; (F.E.G.-A.); (L.G.S.-L.); (E.T.)
| | - José Pedraza-Chaverri
- Department of Biology, Faculty of Chemistry, National Autonomous University of Mexico (UNAM), Mexico City 04510, Mexico; (R.P.-C.); (O.E.A.-T.); (P.R.-M.)
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10
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Inhibition of p300 by Garcinol Protects against Cisplatin-Induced Acute Kidney Injury through Suppression of Oxidative Stress, Inflammation, and Tubular Cell Death in Mice. Antioxidants (Basel) 2020; 9:antiox9121271. [PMID: 33327548 PMCID: PMC7765028 DOI: 10.3390/antiox9121271] [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: 11/20/2020] [Revised: 12/03/2020] [Accepted: 12/12/2020] [Indexed: 02/06/2023] Open
Abstract
Emerging evidence suggests that epigenetic mechanisms such as histone modification are crucially involved in the pathophysiology of acute kidney injury (AKI). The histone acetyltransferase p300 regulates several biological processes through the acetylation of histones or transcription factors. However, the role of p300 in cisplatin-induced AKI remains poorly understood. Therefore, we investigated the effects of garcinol, a potent p300 inhibitor, on cisplatin-induced AKI and explored the mechanisms. Administration of garcinol significantly reversed the upregulation of p300 and increased acetylation of histone H3, along with amelioration of renal dysfunction and histopathological injury in the kidneys of cisplatin-injected mice. Garcinol also attenuated oxidative stress and reduced expression of pro-oxidant enzymes. In addition, garcinol reduced the elevated production of cytokines and chemokines and suppressed immune cell accumulation together with downregulation of vascular adhesion molecules. These beneficial effects of garcinol were associated with a reduction in acetylation of the p65 subunit of nuclear factor kappa-B. Further, garcinol significantly inhibited apoptosis and caspase-3 activation, with a decrease in p53 acetylation in cisplatin-injected mice. Taken together, we demonstrated that the inhibition of p300 by garcinol ameliorated cisplatin-induced renal injury, presumably through epigenetic mechanisms. These results suggest that garcinol might be a potential preventive agent for cisplatin-induced AKI.
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11
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Sun S, Jiang T, Duan N, Wu M, Yan C, Li Y, Cai M, Wang Q. Activation of CB1R-Dependent PGC-1α Is Involved in the Improved Mitochondrial Biogenesis Induced by Electroacupuncture Pretreatment. Rejuvenation Res 2020; 24:104-119. [PMID: 32746712 DOI: 10.1089/rej.2020.2315] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Electroacupuncture (EA) pretreatment induces cerebral ischemic tolerance; however, the mechanism remains poorly understood. This study aimed to determine the participation of peroxisome proliferator-activated receptor γ coactivator-1α (PGC-1α)-mediated mitochondrial biogenesis in the neuroprotection of EA and whether cannabinoid receptor 1 (CB1R) is involved in this mechanism. At 2 hours after EA pretreatment, adult male C57BL/6j mice were subjected to 60-minute right middle cerebral artery occlusion (MCAO). Mitochondrial function, the level of mitochondrial biogenesis-related proteins (nuclear transcription factor 1, NRF1; mitochondrial transcription factor A, TFAM), and mitochondrial DNA (mtDNA) were measured. A small interfering RNA (siRNA) targeting PGC-1α and the CB1R antagonists AM251 and SR141716A were given to the animals before EA pretreatment, and mitochondrial function and biogenesis were examined after MCAO. EA ameliorated the mitochondrial function, upregulated the NRF1 and TFAM expression, and increased the mtDNA levels and the volume and number of mitochondria. EA pretreatment increased the expression of PGC-1α, whereas the PGC-1α siRNA and CB1R antagonists reversed the improved neuroprotection and increased mitochondrial biogenesis induced by EA. Our results indicated that EA pretreatment protects the mitochondria and promotes mitochondrial biogenesis by activating CB1R-dependent PGC-1α, which provides a novel mechanism for EA pretreatment-induced ischemic tolerance.
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Affiliation(s)
- Sisi Sun
- Department of Anesthesiology and Center for Brain Science, the First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China.,The Medical Department of the Emergency Centre of Xi'an, Xi'an, China
| | - Tao Jiang
- Department of Anesthesiology and Center for Brain Science, the First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Na Duan
- Department of Anesthesiology and Center for Brain Science, the First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Meiyan Wu
- Department of Anesthesiology and Center for Brain Science, the First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Chaoying Yan
- Department of Anesthesiology and Center for Brain Science, the First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Yan Li
- Department of Anesthesiology and Center for Brain Science, the First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Min Cai
- Department of Psychiatry, Xijing Hospital, the Fourth Military Medical University, Xi'an, China
| | - Qiang Wang
- Department of Anesthesiology and Center for Brain Science, the First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
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12
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Martínez-Klimova E, Aparicio-Trejo OE, Gómez-Sierra T, Jiménez-Uribe AP, Bellido B, Pedraza-Chaverri J. Mitochondrial dysfunction and endoplasmic reticulum stress in the promotion of fibrosis in obstructive nephropathy induced by unilateral ureteral obstruction. Biofactors 2020; 46:716-733. [PMID: 32905648 DOI: 10.1002/biof.1673] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Accepted: 08/06/2020] [Indexed: 12/18/2022]
Abstract
Obstructive nephropathy favors the progression to chronic kidney disease (CKD), a severe health problem worldwide. The unilateral ureteral obstruction (UUO) model is used to study the development of fibrosis. Impairment of renal mitochondria plays a crucial role in several types of CKD and has been strongly related to fibrosis onset. Nevertheless, in the UUO model, the impairment of mitochondria, their relationship with endoplasmic reticulum (ER) stress induction and the participation of both to induce the fibrotic process remain unclear. In this review, we summarize the current information about mitochondrial bioenergetics, redox dynamics, mitochondrial mass, and biogenesis alterations, as well as the relationship of these mitochondrial alterations with ER stress and their participation in fibrotic processes in UUO models. Early after obstruction, there is metabolic reprogramming related to mitochondrial fatty acid β-oxidation impairment, triggering lipid deposition, oxidative stress, (calcium) Ca2+ dysregulation, and a reduction in mitochondrial mass and biogenesis. Mitochondria and the ER establish a pathological feedback loop that promotes the impairment of both organelles by ER stress pathways and Ca2+ levels dysregulation. Preserving mitochondrial and ER function can prevent or at least delay the fibrotic process and loss of renal function. However, deeper understanding is still necessary for future clinically-useful therapies.
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Affiliation(s)
- Elena Martínez-Klimova
- Facultad de Química, Departamento de Biología, Universidad Nacional Autónoma de México, Mexico, Mexico
| | | | - Tania Gómez-Sierra
- Facultad de Química, Departamento de Biología, Universidad Nacional Autónoma de México, Mexico, Mexico
| | | | - Belen Bellido
- Facultad de Química, Departamento de Biología, Universidad Nacional Autónoma de México, Mexico, Mexico
| | - José Pedraza-Chaverri
- Facultad de Química, Departamento de Biología, Universidad Nacional Autónoma de México, Mexico, Mexico
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13
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Aparicio-Trejo OE, Avila-Rojas SH, Tapia E, Rojas-Morales P, León-Contreras JC, Martínez-Klimova E, Hernández-Pando R, Sánchez-Lozada LG, Pedraza-Chaverri J. Chronic impairment of mitochondrial bioenergetics and β-oxidation promotes experimental AKI-to-CKD transition induced by folic acid. Free Radic Biol Med 2020; 154:18-32. [PMID: 32360615 DOI: 10.1016/j.freeradbiomed.2020.04.016] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Revised: 03/27/2020] [Accepted: 04/17/2020] [Indexed: 12/13/2022]
Abstract
Recent studies suggest that mitochondrial bioenergetics and oxidative stress alterations may be common mechanisms involved in the progression of renal damage. However, the evolution of the mitochondrial alterations over time and the possible effects that their prevention could have in the progression of renal damage are not clear. Folic acid (FA)-induced kidney damage is a widely used experimental model to induce acute kidney injury (AKI), which can evolve to chronic kidney disease (CKD). Therefore, it has been extensively applied to study the mechanisms involved in AKI-to-CKD transition. We previously demonstrated that one day after FA administration, N-acetyl-cysteine (NAC) pre-administration prevented the development of AKI induced by FA. Such therapeutic effect was related to mitochondrial preservation. In the present study, we characterized the temporal course of mitochondrial bioenergetics and redox state alterations along the progression of renal damage induced by FA. Mitochondrial function was studied at different time points and showed a sustained impairment in oxidative phosphorylation capacity and a decrease in β-oxidation, decoupling, mitochondrial membrane potential depolarization and a pro-oxidative state, attributed to the reduction in activity of complexes I and III and mitochondrial cristae effacement, thus favoring the transition from AKI to CKD. Furthermore, the mitochondrial protection by NAC administration before AKI prevented not only the long-term deterioration of mitochondrial function at the chronic stage, but also CKD development. Taken together, our results support the idea that the prevention of mitochondrial dysfunction during an AKI event can be a useful strategy to prevent the transition to CKD.
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Affiliation(s)
- Omar Emiliano Aparicio-Trejo
- Department of Biology, Faculty of Chemistry, National Autonomous University of Mexico (UNAM), Mexico City, 04510, Mexico
| | - Sabino Hazael Avila-Rojas
- Department of Biology, Faculty of Chemistry, National Autonomous University of Mexico (UNAM), Mexico City, 04510, Mexico
| | - Edilia Tapia
- Department of Cardio-Renal Physiopathology, National Institute of Cardiology "Ignacio Chávez", Mexico City, 14080, Mexico
| | - Pedro Rojas-Morales
- Department of Biology, Faculty of Chemistry, National Autonomous University of Mexico (UNAM), Mexico City, 04510, Mexico
| | - Juan Carlos León-Contreras
- Experimental Pathology Section, National Institute of Medical Sciences and Nutrition ''Salvador Zubirán'', 14000, Mexico, Mexico City, Mexico
| | - Elena Martínez-Klimova
- Department of Biology, Faculty of Chemistry, National Autonomous University of Mexico (UNAM), Mexico City, 04510, Mexico
| | - Rogelio Hernández-Pando
- Experimental Pathology Section, National Institute of Medical Sciences and Nutrition ''Salvador Zubirán'', 14000, Mexico, Mexico City, Mexico
| | - Laura Gabriela Sánchez-Lozada
- Department of Cardio-Renal Physiopathology, National Institute of Cardiology "Ignacio Chávez", Mexico City, 14080, Mexico
| | - José Pedraza-Chaverri
- Department of Biology, Faculty of Chemistry, National Autonomous University of Mexico (UNAM), Mexico City, 04510, Mexico.
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14
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Ghasemzadeh Rahbardar M, Razavi BM, Hosseinzadeh H. Investigating the ameliorative effect of alpha-mangostin on development and existing pain in a rat model of neuropathic pain. Phytother Res 2020; 34:3211-3225. [PMID: 32592535 DOI: 10.1002/ptr.6768] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2020] [Revised: 05/17/2020] [Accepted: 05/24/2020] [Indexed: 01/01/2023]
Abstract
Mangosteen fruit has been used for various disorders, including pain. The effects of alpha-mangostin, the main component of mangosteen, on the neuropathic pain caused by chronic constriction injury (CCI) were evaluated in rats. In treatment groups, alpha-mangostin (10, 50, 100 mg/kg/day, i.p.) was administered from Day 0, the day of surgery, for 14 days. The degree of heat hyperalgesia, cold, and mechanical allodynia was assessed on Days 0, 3, 5, 7, 10, and 14. The lumbar spinal cord levels of MDA, GSH, inflammatory markers (TLR-4, TNF-α, MMP2, COX2, IL-1β, iNOS, and NO), apoptotic markers (Bcl-2, Bax, and caspase-3) were measured by western blot on Days 7 and 14. Rats in the CCI group showed thermal hyperalgesia, cold, and mechanical allodynia on Days 3-14. All concentrations of alpha-mangostin alleviated CCI-induced behavioral alterations. MDA level augmented and GSH level decreased in the CCI group and alpha-mangostin (50, 100 mg/kg) reversed the alterations. An enhancement in the levels of all inflammatory markers, Bax, and caspase-3 was shown on Days 7 and 14, which was controlled by alpha-mangostin (50 mg/kg). The detected antinociceptive effects of alpha-mangostin may be mediated through antioxidant, anti-inflammatory, and antiapoptotic properties.
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Affiliation(s)
| | - Bibi Marjan Razavi
- Department of Pharmacodynamics and Toxicology, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran.,Targeted Drug Delivery Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Hossein Hosseinzadeh
- Pharmaceutical Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran.,Department of Pharmacodynamics and Toxicology, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
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15
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Barros L. Antioxidants Properties of Natural Products: A Themed Issue in Honor of Professor Isabel C.F.R. Ferreira. Antioxidants (Basel) 2020; 9:antiox9040286. [PMID: 32231030 PMCID: PMC7222204 DOI: 10.3390/antiox9040286] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Accepted: 03/26/2020] [Indexed: 11/28/2022] Open
Affiliation(s)
- Lillian Barros
- Centro de Investigação de Montanha (CIMO), Instituto Politécnico de Bragança, Campus de Santa Apolónia, 5300-253 Bragança, Portugal
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16
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E6 Oncoproteins from High-Risk Human Papillomavirus Induce Mitochondrial Metabolism in a Head and Neck Squamous Cell Carcinoma Model. Biomolecules 2019; 9:biom9080351. [PMID: 31398842 PMCID: PMC6722992 DOI: 10.3390/biom9080351] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2019] [Revised: 08/05/2019] [Accepted: 08/06/2019] [Indexed: 02/07/2023] Open
Abstract
Head and neck squamous cell carcinoma (HNSCC) cells that are positive for human papillomavirus (HPV+) favor mitochondrial metabolism rather than glucose metabolism. However, the involvement of mitochondrial metabolism in HNSCC HPV+ cells is still unknown. The aim of this work was to evaluate the role of E6 oncoproteins from HPV16 and HPV18 in the mitochondrial metabolism in an HNSCC model. We found that E6 from both viral types abates the phosphorylation of protein kinase B-serine 473 (pAkt), which is associated with a shift in mitochondrial metabolism. E6 oncoproteins increased the levels of protein subunits of mitochondrial complexes (I to IV), as well as the ATP synthase and the protein levels of the voltage dependent anion channel (VDAC). Although E6 proteins increased the basal and leak respiration, the ATP-linked respiration was not affected, which resulted in mitochondrial decoupling. This increase in leak respiration was associated to the induction of oxidative stress (OS) in cells expressing E6, as it was observed by the fall in the glutathione/glutathione disulfide (GSH/GSSG) rate and the increase in reactive oxygen species (ROS), carbonylated proteins, and DNA damage. Taken together, our results suggest that E6 oncoproteins from HPV16 and HPV18 are inducers of mitochondrial metabolism.
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