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Fortin CL, McCray TN, Saxton SH, Johansson F, Andino CB, Mene J, Wang Y, Stevens KR. Temporal Dynamics of Metabolic Acquisition in Grafted Engineered Human Liver Tissue. Adv Biol (Weinh) 2023; 7:e2200208. [PMID: 36328790 PMCID: PMC10259871 DOI: 10.1002/adbi.202200208] [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: 07/21/2022] [Revised: 09/23/2022] [Indexed: 11/06/2022]
Abstract
Liver disease affects millions globally, and end-stage liver failure is only cured by organ transplant. Unfortunately, there is a growing shortage of donor organs as well as inequitable access to transplants across populations. Engineered liver tissue grafts that supplement or replace native organ function can address this challenge. While engineered liver tissues have been successfully engrafted previously, the extent to which these tissues express human liver metabolic genes and proteins remains unknown. Here, it is built engineered human liver tissues and characterized their engraftment, expansion, and metabolic phenotype at sequential stages post-implantation by RNA sequencing, histology, and host serology. Expression of metabolic genes is observed at weeks 1-2, followed by the cellular organization into hepatic cords by weeks 4-9.5. Furthermore, grafted engineered tissues exhibited progressive spatially restricted expression of critical functional proteins known to be zonated in the native human liver. This is the first report of engineered human liver tissue zonation after implantation in vivo, which can have important translational implications for this field.
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Affiliation(s)
- Chelsea L Fortin
- Institute for Stem Cell & Regenerative Medicine, University of Washington, Seattle, Washington, 98109, USA
- Department of Bioengineering, University of Washington, Seattle, Washington, 98105, USA
- Department of Laboratory Medicine and Pathology, University of Washington, Seattle, Washington, 98195, USA
| | - Tara N McCray
- Institute for Stem Cell & Regenerative Medicine, University of Washington, Seattle, Washington, 98109, USA
- Department of Bioengineering, University of Washington, Seattle, Washington, 98105, USA
| | - Sarah H Saxton
- Institute for Stem Cell & Regenerative Medicine, University of Washington, Seattle, Washington, 98109, USA
- Department of Bioengineering, University of Washington, Seattle, Washington, 98105, USA
| | - Fredrik Johansson
- Institute for Stem Cell & Regenerative Medicine, University of Washington, Seattle, Washington, 98109, USA
- Department of Bioengineering, University of Washington, Seattle, Washington, 98105, USA
| | - Christian B Andino
- Institute for Stem Cell & Regenerative Medicine, University of Washington, Seattle, Washington, 98109, USA
- Department of Bioengineering, University of Washington, Seattle, Washington, 98105, USA
| | - Jonathan Mene
- Institute for Stem Cell & Regenerative Medicine, University of Washington, Seattle, Washington, 98109, USA
- Department of Bioengineering, University of Washington, Seattle, Washington, 98105, USA
| | - Yuliang Wang
- Institute for Stem Cell & Regenerative Medicine, University of Washington, Seattle, Washington, 98109, USA
- Department of Computer Science & Engineering, University of Washington, Seattle, Washington, 98195, USA
| | - Kelly R Stevens
- Institute for Stem Cell & Regenerative Medicine, University of Washington, Seattle, Washington, 98109, USA
- Department of Bioengineering, University of Washington, Seattle, Washington, 98105, USA
- Department of Laboratory Medicine and Pathology, University of Washington, Seattle, Washington, 98195, USA
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2
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Kheiripour N, Plarak A, Heshmati A, Asl SS, Mehri F, Ebadollahi-Natanzi A, Ranjbar A, Hosseini A. Evaluation of the hepatoprotective effects of curcumin and nanocurcumin against paraquat-induced liver injury in rats: Modulation of oxidative stress and Nrf2 pathway. J Biochem Mol Toxicol 2021; 35:e22739. [PMID: 33544450 DOI: 10.1002/jbt.22739] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2020] [Revised: 09/12/2020] [Accepted: 01/28/2021] [Indexed: 12/27/2022]
Abstract
Paraquat (PQ) is a widely used herbicide all over the world, which is highly toxic for animals and humans. Its cytotoxicity is based on reactive radical generation. The aim of this study is to evaluate and compare the hepatoprotective effects of curcumin and nanocurcumin against liver damage caused by sub-acute exposure with PQ via modulation of oxidative stress and genes expression of nuclear factor erythroid 2-related factor 2 (Nrf2) pathway. Rats were exposed to PQ (5 mg/kg/day, orally) + curcumin or nanocurcumin (100 mg/kg/day, orally) for 7 days. Then rats were anesthetized and serum and liver samples were collected. Next, serum enzymatic activities, liver histopathology, oxidative stress, and expression of genes involved in Nrf2 signaling pathway were assessed by biochemical and enzyme-linked immunosorbent assay methods, hematoxylin and eosin staining, and real-time polymerase chain reaction analysis. PQ significantly increased malondialdehyde, alanine transaminase, aspartate aminotransferase, alkaline phosphatase levels, and Kelch-like ECH-associated protein 1 gene expression and also decreased total antioxidant capacity, total thiol group levels, Glutathione S-transferases, heme oxygenase 1, Nrf2, and NAD(P)H:quinone oxidoreductase 1 genes expression, causing histological damages to liver tissue. These changes were significantly modulated by curcumin and nanocurcumin treatments. Our findings showed that nanocurcumin had better hepatoprotective effect than curcumin in liver damage after PQ exposure most likely through modulation of oxidative stress and genes expression of Nrf2 pathway.
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Affiliation(s)
- Nejat Kheiripour
- Research Center for Biochemistry and Nutrition in Metabolic Diseases, Kashan University of Medical Sciences, Kashan, Iran
| | - Alireza Plarak
- Department of Pharmacology and Toxicology, Medicinal Plants and Natural Products Research Center, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Ali Heshmati
- Nutrition Health Research Center, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Sara Soleimani Asl
- Anatomy Department, School of Medicine, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Fereshteh Mehri
- Nutrition Health Research Center, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Alireza Ebadollahi-Natanzi
- Medicinal plants Department, Imam Khomeini Higher Education Center, Agricultural Research, Education and Extension Organization (AREEO), Karaj, Iran
| | - Akram Ranjbar
- Department of Pharmacology and Toxicology, Medicinal Plants and Natural Products Research Center, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Asieh Hosseini
- Razi Drug Research Center, Iran University of Medical Sciences, Tehran, Iran
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3
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Park HB, Goddard TN, Oh J, Patel J, Wei Z, Perez CE, Mercado BQ, Wang R, Wyche TP, Piizzi G, Flavell RA, Crawford JM. Bacterial Autoimmune Drug Metabolism Transforms an Immunomodulator into Structurally and Functionally Divergent Antibiotics. Angew Chem Int Ed Engl 2020; 59:7871-7880. [PMID: 32097515 PMCID: PMC7200298 DOI: 10.1002/anie.201916204] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Indexed: 01/01/2023]
Abstract
Tapinarof is a stilbene drug that is used to treat psoriasis and atopic dermatitis, and is thought to function through regulation of the AhR and Nrf2 signaling pathways, which have also been linked to inflammatory bowel diseases. It is produced by the gammaproteobacterial Photorhabdus genus, which thus represents a model to probe tapinarof structural and functional transformations. We show that Photorhabdus transforms tapinarof into novel drug metabolism products that kill inflammatory bacteria, and that a cupin enzyme contributes to the conversion of tapinarof and related dietary stilbenes into novel dimers. One dimer has activity against methicillin-resistant Staphylococcus aureus (MRSA) and vancomycin-resistant Enterococcus faecalis (VRE), and another undergoes spontaneous cyclizations to a cyclopropane-bridge-containing hexacyclic framework that exhibits activity against Mycobacterium. These dimers lack efficacy in a colitis mouse model, whereas the monomer reduces disease symptoms.
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Affiliation(s)
- Hyun Bong Park
- Department of Chemistry, Yale University, New Haven, CT 06520, USA
- Chemical Biology Institute, Yale University, West Haven, CT 06516, USA
- These authors contributed equally: Hyun Bong Park, Tyler N. Goddard
| | - Tyler N. Goddard
- Department of Chemistry, Yale University, New Haven, CT 06520, USA
- Chemical Biology Institute, Yale University, West Haven, CT 06516, USA
- These authors contributed equally: Hyun Bong Park, Tyler N. Goddard
| | - Joonseok Oh
- Department of Chemistry, Yale University, New Haven, CT 06520, USA
- Chemical Biology Institute, Yale University, West Haven, CT 06516, USA
| | - Jaymin Patel
- Chemical Biology Institute, Yale University, West Haven, CT 06516, USA
- Department of Molecular, Cellular, and Developmental Biology, Yale University, New Haven, CT 06520, USA
| | - Zheng Wei
- Chemical Biology Institute, Yale University, West Haven, CT 06516, USA
- Department of Immunobiology, Yale University School of Medicine, New Haven, CT 06520, USA
| | - Corey E. Perez
- Department of Chemistry, Yale University, New Haven, CT 06520, USA
- Chemical Biology Institute, Yale University, West Haven, CT 06516, USA
| | - Brandon Q. Mercado
- Department of Chemistry, Yale University, New Haven, CT 06520, USA
- Chemical and Biophysical Instrumentation Center, Yale University, New Haven, CT 06520, USA
| | - Rurun Wang
- Exploratory Science Center, Merck & Co., Inc., Cambridge, MA, USA
| | - Thomas P. Wyche
- Exploratory Science Center, Merck & Co., Inc., Cambridge, MA, USA
| | - Grazia Piizzi
- Exploratory Science Center, Merck & Co., Inc., Cambridge, MA, USA
| | - Richard A. Flavell
- Department of Immunobiology, Yale University School of Medicine, New Haven, CT 06520, USA
- Howard Hughes Medical Institute, Yale University School of Medicine, New Haven, CT 06520, USA
| | - Jason M. Crawford
- Department of Chemistry, Yale University, New Haven, CT 06520, USA
- Chemical Biology Institute, Yale University, West Haven, CT 06516, USA
- Department of Microbial Pathogenesis, Yale School of Medicine, New Haven, CT 06536, USA
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4
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Park HB, Goddard TN, Oh J, Patel J, Wei Z, Perez CE, Mercado BQ, Wang R, Wyche TP, Piizzi G, Flavell RA, Crawford JM. Bacterial Autoimmune Drug Metabolism Transforms an Immunomodulator into Structurally and Functionally Divergent Antibiotics. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201916204] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Hyun Bong Park
- Department of Chemistry Yale University New Haven CT 06520 USA
- Chemical Biology Institute Yale University West Haven CT 06516 USA
| | - Tyler N. Goddard
- Department of Chemistry Yale University New Haven CT 06520 USA
- Chemical Biology Institute Yale University West Haven CT 06516 USA
| | - Joonseok Oh
- Department of Chemistry Yale University New Haven CT 06520 USA
- Chemical Biology Institute Yale University West Haven CT 06516 USA
| | - Jaymin Patel
- Chemical Biology Institute Yale University West Haven CT 06516 USA
- Department of Molecular, Cellular, and Developmental Biology Yale University New Haven CT 06520 USA
| | - Zheng Wei
- Chemical Biology Institute Yale University West Haven CT 06516 USA
- Department of Immunobiology Yale University School of Medicine New Haven CT 06520 USA
| | - Corey E. Perez
- Department of Chemistry Yale University New Haven CT 06520 USA
- Chemical Biology Institute Yale University West Haven CT 06516 USA
| | - Brandon Q. Mercado
- Department of Chemistry Yale University New Haven CT 06520 USA
- Chemical and Biophysical Instrumentation Center Yale University New Haven CT 06520 USA
| | - Rurun Wang
- Exploratory Science Center Merck & Co., Inc. Cambridge MA USA
| | - Thomas P. Wyche
- Exploratory Science Center Merck & Co., Inc. Cambridge MA USA
| | - Grazia Piizzi
- Exploratory Science Center Merck & Co., Inc. Cambridge MA USA
| | - Richard A. Flavell
- Department of Immunobiology Yale University School of Medicine New Haven CT 06520 USA
- Howard Hughes Medical Institute Yale University School of Medicine New Haven CT 06520 USA
| | - Jason M. Crawford
- Department of Chemistry Yale University New Haven CT 06520 USA
- Chemical Biology Institute Yale University West Haven CT 06516 USA
- Department of Microbial Pathogenesis Yale School of Medicine New Haven CT 06536 USA
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Qian JY, Deng P, Liang YD, Pang L, Wu LC, Yang LL, Zhou Z, Yu ZP. 8-Formylophiopogonanone B Antagonizes Paraquat-Induced Hepatotoxicity by Suppressing Oxidative Stress. Front Pharmacol 2019; 10:1283. [PMID: 31708790 PMCID: PMC6821879 DOI: 10.3389/fphar.2019.01283] [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: 08/13/2019] [Accepted: 10/07/2019] [Indexed: 01/15/2023] Open
Abstract
Flavonoids are some of the most important natural products with a variety of physiological activities. 8-Formylophiopogonanone B (8-FOB) is a naturally existing homoisoflavonoid in Ophiopogon japonicus. Paraquat (PQ) has been widely used as a potent herbicide and has high toxicity in humans. The goal of the present study was to investigate whether 8-FOB could protect against PQ-induced hepatotoxicity in vitro and in vivo. We first tested the protective effects of 8-FOB on PQ-induced cytotoxicity in L02 cells by determining cell viability, intracellular oxidative stress levels, mitochondrial function, and apoptosis in vitro. To verify the protective effects of 8-FOB, we pretreated mice with 8-FOB and assessed liver function, hepatic oxidative stress, and histopathological changes after PQ administration. Our results revealed that 8-FOB could antagonize PQ-induced hepatotoxicity in vitro and in vivo. The antagonistic effects could be attributed to suppressing oxidative stress, preserving mitochondrial function, and inhibiting apoptosis. The present study is the first to document that 8-FOB, a homoisoflavonoid compound, is an effective antioxidant for antagonizing PQ-induced hepatotoxicity.
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Affiliation(s)
- Jing-Yu Qian
- Department of Cell Biology, School of Life Sciences and School of Medicine, Guangxi University, Nanning, China
| | - Ping Deng
- Department of Occupational Health, Third Military Medical University, Chongqing, China
| | - Yi-Dan Liang
- Department of Cell Biology, School of Life Sciences and School of Medicine, Guangxi University, Nanning, China
| | - Li Pang
- Department of Cell Biology, School of Life Sciences and School of Medicine, Guangxi University, Nanning, China
| | - Li-Chuan Wu
- Department of Cell Biology, School of Life Sciences and School of Medicine, Guangxi University, Nanning, China
| | - Ling-Ling Yang
- Department of Occupational Health, Third Military Medical University, Chongqing, China
| | - Zhouv Zhou
- Department of Cell Biology, School of Life Sciences and School of Medicine, Guangxi University, Nanning, China
| | - Zheng-Ping Yu
- Department of Cell Biology, School of Life Sciences and School of Medicine, Guangxi University, Nanning, China
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Caldez MJ, Van Hul N, Koh HWL, Teo XQ, Fan JJ, Tan PY, Dewhurst MR, Too PG, Talib SZA, Chiang BE, Stünkel W, Yu H, Lee P, Fuhrer T, Choi H, Björklund M, Kaldis P. Metabolic Remodeling during Liver Regeneration. Dev Cell 2018; 47:425-438.e5. [PMID: 30344111 DOI: 10.1016/j.devcel.2018.09.020] [Citation(s) in RCA: 73] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2017] [Revised: 05/13/2018] [Accepted: 09/21/2018] [Indexed: 12/29/2022]
Abstract
Liver disease is linked to a decreased capacity of hepatocytes to divide. In addition, cellular metabolism is important for tissue homeostasis and regeneration. Since metabolic changes are a hallmark of liver disease, we investigated the connections between metabolism and cell division. We determined global metabolic changes at different stages of liver regeneration using a combination of integrated transcriptomic and metabolomic analyses with advanced functional redox in vivo imaging. Our data indicate that blocking hepatocyte division during regeneration leads to mitochondrial dysfunction and downregulation of oxidative pathways. This resulted in an increased redox ratio and hyperactivity of alanine transaminase allowing the production of alanine and α-ketoglutarate from pyruvate when mitochondrial functions are impaired. Our data suggests that during liver regeneration, cell division leads to hepatic metabolic remodeling. Moreover, we demonstrate that hepatocytes are equipped with a flexible metabolic machinery able to adapt dynamically to changes during tissue regeneration.
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Affiliation(s)
- Matias J Caldez
- Institute of Molecular and Cell Biology (IMCB), A(∗)STAR (Agency for Science, Technology and Research), 61 Biopolis Drive, Proteos #3-09, Singapore 138673, Republic of Singapore; National University of Singapore (NUS), Department of Biochemistry, Singapore 117597, Republic of Singapore
| | - Noémi Van Hul
- Institute of Molecular and Cell Biology (IMCB), A(∗)STAR (Agency for Science, Technology and Research), 61 Biopolis Drive, Proteos #3-09, Singapore 138673, Republic of Singapore
| | - Hiromi W L Koh
- Saw Swee Hock School of Public Health, National University of Singapore, 12 Science Drive 2, Singapore 117549, Republic of Singapore
| | - Xing Qi Teo
- Singapore Bio-Imaging Consortium, A(∗)STAR, Singapore, Republic of Singapore
| | - Jun Jun Fan
- Institute of Bioengineering and Nanotechnology, A(∗)STAR, The Nanos, #04-01, 31 Biopolis Way, Singapore 138669, Republic of Singapore; Singapore-MIT Alliance for Research and Technology, 1 CREATE Way, #10-01 CREATE Tower, Singapore 138602, Republic of Singapore; Department of Orthopaedic Surgery, Xi Jing Hospital, Fourth Military Medical University, #88 Jiefang Road, Xi'an 710032, China
| | - Peck Yean Tan
- Singapore Institute of Clinical Sciences, A(∗)STAR, Singapore, Republic of Singapore
| | - Matthew R Dewhurst
- Institute of Molecular and Cell Biology (IMCB), A(∗)STAR (Agency for Science, Technology and Research), 61 Biopolis Drive, Proteos #3-09, Singapore 138673, Republic of Singapore; Faculty of Biology, Medicine and Health, University of Manchester, AV Hill Building, Oxford Road, Manchester M13 9PT, UK
| | - Peh Gek Too
- Singapore Institute of Clinical Sciences, A(∗)STAR, Singapore, Republic of Singapore
| | - S Zakiah A Talib
- Institute of Molecular and Cell Biology (IMCB), A(∗)STAR (Agency for Science, Technology and Research), 61 Biopolis Drive, Proteos #3-09, Singapore 138673, Republic of Singapore
| | - Beatrice E Chiang
- Institute of Molecular and Cell Biology (IMCB), A(∗)STAR (Agency for Science, Technology and Research), 61 Biopolis Drive, Proteos #3-09, Singapore 138673, Republic of Singapore
| | - Walter Stünkel
- Singapore Institute of Clinical Sciences, A(∗)STAR, Singapore, Republic of Singapore
| | - Hanry Yu
- Institute of Bioengineering and Nanotechnology, A(∗)STAR, The Nanos, #04-01, 31 Biopolis Way, Singapore 138669, Republic of Singapore; Department of Physiology, Yong Loo Lin School of Medicine, MD9-04-11, 2 Medical Drive, Singapore 117597, Republic of Singapore; Mechanobiology Institute, National University of Singapore, 5A Engineering Drive 1, Singapore 117411, Republic of Singapore; Gastroenterology Department, Southern Medical University, Guangzhou 510515, China
| | - Philip Lee
- Singapore Bio-Imaging Consortium, A(∗)STAR, Singapore, Republic of Singapore
| | - Tobias Fuhrer
- Institute of Molecular Systems Biology, ETH Zürich, Zürich, Switzerland
| | - Hyungwon Choi
- Institute of Molecular and Cell Biology (IMCB), A(∗)STAR (Agency for Science, Technology and Research), 61 Biopolis Drive, Proteos #3-09, Singapore 138673, Republic of Singapore; Saw Swee Hock School of Public Health, National University of Singapore, 12 Science Drive 2, Singapore 117549, Republic of Singapore
| | - Mikael Björklund
- Zhejiang University-University of Edinburgh (ZJU-UoE) Institute, Zhejiang University School of Medicine, International Campus, Zhejiang University, 718 East Haizhou Rd, Haining, Zhejiang 314400, China
| | - Philipp Kaldis
- Institute of Molecular and Cell Biology (IMCB), A(∗)STAR (Agency for Science, Technology and Research), 61 Biopolis Drive, Proteos #3-09, Singapore 138673, Republic of Singapore; National University of Singapore (NUS), Department of Biochemistry, Singapore 117597, Republic of Singapore.
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7
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Effect of Nitric Oxide on Human Corneal Epithelial Cell Viability and Corneal Wound Healing. Sci Rep 2017; 7:8093. [PMID: 28808342 PMCID: PMC5556055 DOI: 10.1038/s41598-017-08576-9] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2017] [Accepted: 07/14/2017] [Indexed: 01/05/2023] Open
Abstract
Although the wound healing effects of nitric oxide (NO) are known, the mechanism by which NO modulates corneal wound healing remains unclear. In this study, we investigated the effect of exogenous NO donor (NaNO2) on corneal wound healing. We found that NaNO2 (0.1 μM to 100 μM) increased human corneal epithelial cell (HCEC) viability and migration. It also modulated the phosphorylation of mitogen-activated protein kinases (MAPKs) in a time- dependent manner in those HCECs. Further, p38 MAPK phosphorylation increased at 6 h and normalized at 24 h, while the phosphorylation of extracellular signal regulated kinase (ERK) was increased both at 6 h and 24 h. Topical treatment with NaNO2 (10 μM) enhanced corneal epithelial healing and decreased corneal opacity in murine corneal alkali burn model by modulating inflammatory cytokines. Our findings suggest that NO increased HCEC proliferation and migration via time-dependent MAPK activation and eventually enhanced corneal recovery from the alkali burn.
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Firat O, Makay O, Yeniay L, Gokce G, Yenisey C, Coker A. Omega-3 fatty acids inhibit oxidative stress in a rat model of liver regeneration. Ann Surg Treat Res 2017; 93:1-10. [PMID: 28706885 PMCID: PMC5507785 DOI: 10.4174/astr.2017.93.1.1] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2016] [Revised: 12/02/2016] [Accepted: 12/12/2016] [Indexed: 12/20/2022] Open
Abstract
Purpose Lipid peroxidation and consequent reactive oxygen species in the setting of oxidative stress have crucial roles in liver regeneration, which may adversely affect the regeneration itself and lead to liver failure. The aim of the current study is to investigate whether omega-3 fatty acid supplementation inhibits oxidative stress in an experimental model of liver regeneration. Methods Forty rats were allocated to four groups. Rats in group A received a sham operation. Rats in group B were subjected to right portal vein ligation (RPVL) and saline infusion. Rats in groups C and D were subjected to RPVL and total parenteral nutrition (TPN) with an all-in-one admixture containing a soybean oil based lipid emulsion. Rats in group D were additionally supplemented with omega-3 fatty acid infusion. Oxidative stresses in the blood and liver were measured by glutathione, superoxide dismutase, catalase, glutathione peroxidase, malondialdehyde, and nitric oxide. Results Omega-3 supplementation to the TPN solution significantly corrected alterations in the blood and tissue concentrations of oxidants and anti-oxidants during regeneration (P < 0.05). Conclusion Omega-3 fatty acid supplementation to the TPN solution revealed promising results in removal of oxidative stress that emerges during liver regeneration.
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Affiliation(s)
- Ozgur Firat
- Department of General Surgery, Ege University Hospital, Izmir, Turkey
| | - Ozer Makay
- Department of General Surgery, Ege University Hospital, Izmir, Turkey
| | - Levent Yeniay
- Department of General Surgery, Ege University Hospital, Izmir, Turkey
| | - Goksel Gokce
- Department of Pharmacology, Faculty of Pharmacy, Ege University, Izmir, Turkey
| | - Cigdem Yenisey
- Department of Medical Biochemistry, Adnan Menderes University Hospital, Aydın, Turkey
| | - Ahmet Coker
- Department of General Surgery, Ege University Hospital, Izmir, Turkey
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9
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Li L, Bao X, Zhang QY, Negishi M, Ding X. Role of CYP2B in Phenobarbital-Induced Hepatocyte Proliferation in Mice. Drug Metab Dispos 2017; 45:977-981. [PMID: 28546505 DOI: 10.1124/dmd.117.076406] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2017] [Accepted: 05/23/2017] [Indexed: 11/22/2022] Open
Abstract
Phenobarbital (PB) promotes liver tumorigenesis in rodents, in part through activation of the constitutive androstane receptor (CAR) and the consequent changes in hepatic gene expression and increases in hepatocyte proliferation. A typical effect of CAR activation by PB is a marked induction of Cyp2b10 expression in the liver; the latter has been suspected to be vital for PB-induced hepatocellular proliferation. This hypothesis was tested here by using a Cyp2a(4/5)bgs-null (null) mouse model in which all Cyp2b genes are deleted. Adult male and female wild-type (WT) and null mice were treated intraperitoneally with PB at 50 mg/kg once daily for 5 successive days and tested on day 6. The liver-to-body weight ratio, an indicator of liver hypertrophy, was increased by 47% in male WT mice, but by only 22% in male Cyp2a(4/5)bgs-null mice, by the PB treatment. The fractions of bromodeoxyuridine-positive hepatocyte nuclei, assessed as a measure of the rate of hepatocyte proliferation, were also significantly lower in PB-treated male null mice compared with PB-treated male WT mice. However, whereas few proliferating hepatocytes were detected in saline-treated mice, many proliferating hepatocytes were still detected in PB-treated male null mice. In contrast, female WT mice were much less sensitive than male WT mice to PB-induced hepatocyte proliferation, and PB-treated female WT and PB-treated female null mice did not show significant difference in rates of hepatocyte proliferation. These results indicate that CYP2B induction plays a significant, but partial, role in PB-induced hepatocyte proliferation in male mice.
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Affiliation(s)
- Lei Li
- College of Nanoscale Science, SUNY Polytechnic Institute, Albany, New York (L.L., X.D.); Wadsworth Center, New York State Department of Health, and School of Public Health, University at Albany, Albany, New York (L.L., X.B., Q.Z., X.D.); and National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, North Carolina (M.N.)
| | - Xiaochen Bao
- College of Nanoscale Science, SUNY Polytechnic Institute, Albany, New York (L.L., X.D.); Wadsworth Center, New York State Department of Health, and School of Public Health, University at Albany, Albany, New York (L.L., X.B., Q.Z., X.D.); and National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, North Carolina (M.N.)
| | - Qing-Yu Zhang
- College of Nanoscale Science, SUNY Polytechnic Institute, Albany, New York (L.L., X.D.); Wadsworth Center, New York State Department of Health, and School of Public Health, University at Albany, Albany, New York (L.L., X.B., Q.Z., X.D.); and National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, North Carolina (M.N.)
| | - Masahiko Negishi
- College of Nanoscale Science, SUNY Polytechnic Institute, Albany, New York (L.L., X.D.); Wadsworth Center, New York State Department of Health, and School of Public Health, University at Albany, Albany, New York (L.L., X.B., Q.Z., X.D.); and National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, North Carolina (M.N.)
| | - Xinxin Ding
- College of Nanoscale Science, SUNY Polytechnic Institute, Albany, New York (L.L., X.D.); Wadsworth Center, New York State Department of Health, and School of Public Health, University at Albany, Albany, New York (L.L., X.B., Q.Z., X.D.); and National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, North Carolina (M.N.)
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10
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Shi L, Song R, Yao X, Ren Y. Effects of selenium on the proliferation, apoptosis and testosterone production of sheep Leydig cells in vitro. Theriogenology 2017; 93:24-32. [DOI: 10.1016/j.theriogenology.2017.01.022] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2016] [Revised: 01/07/2017] [Accepted: 01/11/2017] [Indexed: 12/11/2022]
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11
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Fuchs K, Kuehn A, Mahling M, Guenthoer P, Hector A, Schwenck J, Hartl D, Laufer S, Kohlhofer U, Quintanilla-Martinez L, Reischl G, Röcken M, Pichler BJ, Kneilling M. In Vivo Hypoxia PET Imaging Quantifies the Severity of Arthritic Joint Inflammation in Line with Overexpression of Hypoxia-Inducible Factor and Enhanced Reactive Oxygen Species Generation. J Nucl Med 2017; 58:853-860. [PMID: 28183987 DOI: 10.2967/jnumed.116.185934] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2016] [Accepted: 01/11/2017] [Indexed: 12/30/2022] Open
Abstract
Hypoxia is essential for the development of autoimmune diseases such as rheumatoid arthritis (RA) and is associated with the expression of reactive oxygen species (ROS), because of the enhanced infiltration of immune cells. The aim of this study was to demonstrate the feasibility of measuring hypoxia noninvasively in vivo in arthritic ankles with PET/MRI using the hypoxia tracers 18F-fluoromisonidazole (18F-FMISO) and 18F-fluoroazomycinarabinoside (18F-FAZA). Additionally, we quantified the temporal dynamics of hypoxia and ROS stress using L-012, an ROS-sensitive chemiluminescence optical imaging probe, and analyzed the expression of hypoxia-inducible factors (HIFs). Methods: Mice underwent noninvasive in vivo PET/MRI to measure hypoxia or optical imaging to analyze ROS expression. Additionally, we performed ex vivo pimonidazole-/HIF-1α immunohistochemistry and HIF-1α/2α Western blot/messenger RNA analysis of inflamed and healthy ankles to confirm our in vivo results. Results: Mice diseased from experimental RA exhibited a 3-fold enhancement in hypoxia tracer uptake, even in the early disease stages, and a 45-fold elevation in ROS expression in inflamed ankles compared with the ankles of healthy controls. We further found strong correlations of our noninvasive in vivo hypoxia PET data with pimonidazole and expression of HIF-1α in arthritic ankles. The strongest hypoxia tracer uptake was observed as soon as day 3, whereas the most pronounced ROS stress was evident on day 6 after the onset of experimental RA, indicating that tissue hypoxia can precede ROS stress in RA. Conclusion: Collectively, for the first time to our knowledge, we have demonstrated that the noninvasive measurement of hypoxia in inflammation using 18F-FAZA and 18F-FMISO PET imaging represents a promising new tool for uncovering and monitoring rheumatic inflammation in vivo. Further, because hypoxic inflamed tissues are associated with the overexpression of HIFs, specific inhibition of HIFs might represent a new powerful treatment strategy.
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Affiliation(s)
- Kerstin Fuchs
- Department of Preclinical Imaging and Radiopharmacy, Werner Siemens Imaging Center, Eberhard Karls University Tuebingen, Tuebingen, Germany
| | - Anna Kuehn
- Department of Preclinical Imaging and Radiopharmacy, Werner Siemens Imaging Center, Eberhard Karls University Tuebingen, Tuebingen, Germany
| | - Moritz Mahling
- Department of Preclinical Imaging and Radiopharmacy, Werner Siemens Imaging Center, Eberhard Karls University Tuebingen, Tuebingen, Germany
| | - Philipp Guenthoer
- Department of Preclinical Imaging and Radiopharmacy, Werner Siemens Imaging Center, Eberhard Karls University Tuebingen, Tuebingen, Germany
| | - Andreas Hector
- Children's Hospital of the Eberhard Karls University Tuebingen, Tuebingen, Germany
| | - Johannes Schwenck
- Department of Preclinical Imaging and Radiopharmacy, Werner Siemens Imaging Center, Eberhard Karls University Tuebingen, Tuebingen, Germany.,Department of Nuclear Medicine and Clinical Molecular Imaging, Eberhard Karls University, Tuebingen, Tuebingen, Germany
| | - Dominik Hartl
- Children's Hospital of the Eberhard Karls University Tuebingen, Tuebingen, Germany.,Immunology, Inflammation and Infectious Diseases Discovery and Translational Area, Roche Pharma Research & Early Development (pRED), Roche Innovation Center Basel, Basel, Switzerland
| | - Stefan Laufer
- Department of Pharmacy & Biochemistry, Eberhard Karls University Tuebingen, Tuebingen, Germany
| | - Ursula Kohlhofer
- Institute of Pathology and Neuropathology, Eberhard Karls University Tuebingen and Comprehensive Cancer Center, University Hospital Tuebingen, Tuebingen, Germany; and
| | - Leticia Quintanilla-Martinez
- Institute of Pathology and Neuropathology, Eberhard Karls University Tuebingen and Comprehensive Cancer Center, University Hospital Tuebingen, Tuebingen, Germany; and
| | - Gerald Reischl
- Department of Preclinical Imaging and Radiopharmacy, Werner Siemens Imaging Center, Eberhard Karls University Tuebingen, Tuebingen, Germany
| | - Martin Röcken
- Department of Dermatology, Eberhard Karls University Tuebingen, Tuebingen, Germany
| | - Bernd J Pichler
- Department of Preclinical Imaging and Radiopharmacy, Werner Siemens Imaging Center, Eberhard Karls University Tuebingen, Tuebingen, Germany
| | - Manfred Kneilling
- Department of Preclinical Imaging and Radiopharmacy, Werner Siemens Imaging Center, Eberhard Karls University Tuebingen, Tuebingen, Germany .,Department of Dermatology, Eberhard Karls University Tuebingen, Tuebingen, Germany
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12
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Atashpour S, Kargar Jahromi H, Kargar Jahromi Z, Zarei S. Antioxidant effects of aqueous extract of Salep on Paraquat-induced rat liver injury. World J Hepatol 2017; 9:209-216. [PMID: 28217258 PMCID: PMC5295160 DOI: 10.4254/wjh.v9.i4.209] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/21/2016] [Revised: 09/13/2016] [Accepted: 12/14/2016] [Indexed: 02/06/2023] Open
Abstract
AIM To evaluate the effects of aqueous extract of Salep on Paraquat-mediated liver injury.
METHODS In this experimental study, 56 adult male Wistar rats were divided randomly to 7 groups as control, sham, and 5 experimental groups. In control group, rats did not receive any substance during experiment. In Sham group, rats were given distilled water according to their body weight and in experimental groups, Paraquat alone and with different doses of Salep aqueous extract (40, 80, 160 and 320 mg/kg) was given intraperitoneal daily for 14 d. After that, liver biochemical parameter and histologic changes were analyzed and compared in different groups.
RESULTS Paraquat compared to control and sham groups, significantly (P < 0.05) increased serum level of alanine aminotransferase (ALT), aspartate aminotransferase (AST), alkaline phosphatase (ALP), bilirubin, malondialdehyde (MDA) and total oxidant capacity (TOC); while level of total protein, albumin and total antioxidant capacity (TAC) were remarkably decreased by Paraquat. Salep at doses of 80, 160 and 320 mg/kg significantly decreased serum level of ALT, AST, ALP, bilirubin, MDA and TOC and significantly increased total protein, albumin and TAC level as compared to Paraquat exposed group in dose dependent manner. Aqueous extract of Salep at doses of 40 mg/kg made no significant changes in serum level of mentioned biochemical parameters. Liver microscopic observation revealed that Paraquat could cause hepatocyte necrosis, degenerative changes, proliferation and activation of Kupffer cells (sporadically) which were reduced by Salep treatment.
CONCLUSION Salep possesses remarkable hepatoprotection activity against Paraquat-induced hepatic injury by having antioxidant activity and reducing lipid peroxidation and oxidative stress.
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13
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Peuchant E, Bats ML, Moranvillier I, Lepoivre M, Guitton J, Wendum D, Lacombe ML, Moreau-Gaudry F, Boissan M, Dabernat S. Metastasis suppressor NM23 limits oxidative stress in mammals by preventing activation of stress-activated protein kinases/JNKs through its nucleoside diphosphate kinase activity. FASEB J 2017; 31:1531-1546. [PMID: 28077425 DOI: 10.1096/fj.201600705r] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2016] [Accepted: 12/19/2016] [Indexed: 11/11/2022]
Abstract
NME1 (nonmetastatic expressed 1) gene, which encodes nucleoside diphosphate kinase (NDPK) A [also known as nonmetastatic clone 23 (NM23)-H1 in humans and NM23-M1 in mice], is a suppressor of metastasis, but several lines of evidence-mostly from plants-also implicate it in the regulation of the oxidative stress response. Here, our aim was to investigate the physiologic relevance of NDPK A with respect to the oxidative stress response in mammals and to study its molecular basis. NME1-knockout mice died sooner, suffered greater hepatocyte injury, and had lower superoxide dismutase activity than did wild-type (WT) mice in response to paraquat-induced acute oxidative stress. Deletion of NME1 reduced total NDPK activity and exacerbated activation of the stress-related MAPK, JNK, in the liver in response to paraquat. In a mouse transformed hepatocyte cell line and in primary cultures of normal human keratinocytes, MAPK activation in response to H2O2 and UVB, respectively, was dampened by expression of NM23-M1/NM23-H1, dependent on its NDPK catalytic activity. Furthermore, excess or depletion of NM23-M1/NM23-H1 NDPK activity did not affect the intracellular bulk concentration of nucleoside di- and triphosphates. NME1-deficient mouse embryo fibroblasts grew poorly in culture, were more sensitive to stress than WT fibroblasts, and did not immortalize, which suggested that they senesce earlier than do WT fibroblasts. Collectively, these results indicate that the NDPK activity of NM23-M1/NM23-H1 protects cells from acute oxidative stress by inhibiting activation of JNK in mammal models.-Peuchant, E., Bats, M.-L., Moranvillier, I., Lepoivre, M., Guitton, J., Wendum, D., Lacombe, M.-L., Moreau-Gaudry, F., Boissan, M., Dabernat, S. Metastasis suppressor NM23 limits oxidative stress in mammals by preventing activation of stress-activated protein kinases/JNKs through its nucleoside diphosphate kinase activity.
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Affiliation(s)
- Evelyne Peuchant
- Collège Santé Université de Bordeaux, Bordeaux, France.,INSERM 1035, Bordeaux, France.,Centre Hospitalier Universitaire de Bordeaux, Bordeaux, France
| | - Marie-Lise Bats
- Collège Santé Université de Bordeaux, Bordeaux, France.,Centre Hospitalier Universitaire de Bordeaux, Bordeaux, France
| | - Isabelle Moranvillier
- Collège Santé Université de Bordeaux, Bordeaux, France.,INSERM 1035, Bordeaux, France
| | - Michel Lepoivre
- Université Paris Sud, Commissariat à l'Énergie Atomique et aux Énergies, Unité Mixte de Recherche, Centre National de la Recherche Scientifique 9198, Orsay, France
| | - Jérôme Guitton
- Hospices Civils de Lyon, Pierre Bénite, France.,Université de Lyon, Lyon, France
| | - Dominique Wendum
- Sorbonne Universités, Université Pierre et Marie Curie, Université Paris 06, INSERM, Unité Mixte de Recherche S938, Saint-Antoine Research Center, Paris, France.,Laboratoire d'Anatomie Pathologique, Hôpital Saint-Antoine, Paris, France
| | - Marie-Lise Lacombe
- Sorbonne Universités, Université Pierre et Marie Curie, Université Paris 06, INSERM, Unité Mixte de Recherche S938, Saint-Antoine Research Center, Paris, France
| | - François Moreau-Gaudry
- Collège Santé Université de Bordeaux, Bordeaux, France.,INSERM 1035, Bordeaux, France.,Centre Hospitalier Universitaire de Bordeaux, Bordeaux, France
| | - Mathieu Boissan
- Sorbonne Universités, Université Pierre et Marie Curie, Université Paris 06, INSERM, Unité Mixte de Recherche S938, Saint-Antoine Research Center, Paris, France; .,Service de Biochimie et Hormonologie, Hôpital Tenon, Assistance Publique-Hôpitaux de Paris, Paris, France
| | - Sandrine Dabernat
- Collège Santé Université de Bordeaux, Bordeaux, France; .,INSERM 1035, Bordeaux, France.,Centre Hospitalier Universitaire de Bordeaux, Bordeaux, France
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14
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Zhang Y, Unnikrishnan A, Deepa SS, Liu Y, Li Y, Ikeno Y, Sosnowska D, Van Remmen H, Richardson A. A new role for oxidative stress in aging: The accelerated aging phenotype in Sod1 -/- mice is correlated to increased cellular senescence. Redox Biol 2016; 11:30-37. [PMID: 27846439 PMCID: PMC5109248 DOI: 10.1016/j.redox.2016.10.014] [Citation(s) in RCA: 114] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2016] [Revised: 10/19/2016] [Accepted: 10/22/2016] [Indexed: 12/11/2022] Open
Abstract
In contrast to other mouse models that are deficient in antioxidant enzymes, mice null for Cu/Zn-superoxide dismutase (Sod1−/− mice) show a major decrease in lifespan and several accelerated aging phenotypes. The goal of this study was to determine if cell senescence might be a contributing factor in the accelerated aging phenotype observed in the Sod1−/− mice. We focused on kidney because it is a tissue that has been shown to a significant increase in senescent cells with age. The Sod1−/− mice are characterized by high levels of DNA oxidation in the kidney, which is attenuated by DR. The kidney of the Sod1−/− mice also have higher levels of double strand DNA breaks than wild type (WT) mice. Expression (mRNA and protein) of p16 and p21, two of the markers of cellular senescence, which increased with age, are increased significantly in the kidney of Sod1−/− mice as is β-gal staining cells. In addition, the senescence associated secretory phenotype was also increased significantly in the kidney of Sod1−/− mice compared to WT mice as measured by the expression of transcripts for IL-6 and IL-1β. Dietary restriction of the Sod1−/− mice attenuated the increase in DNA damage, cellular senescence, and expression of IL-6 and IL-1β. Interestingly, the Sod1−/− mice showed higher levels of circulating cytokines than WT mice, suggesting that the accelerated aging phenotype shown by the Sod1−/− mice could result from increased inflammation arising from an accelerated accumulation of senescent cells. Based on our data with Sod1−/− mice, we propose that various bouts of increased oxidative stress over the lifespan of an animal leads to the accumulation of senescent cells. The accumulation of senescent cells in turn leads to increased inflammation, which plays a major role in the loss of function and increased pathology that are hallmark features of aging. Sod1−/− mice have high levels of oxidative damage and DNA double strand breaks. Sod1−/− mice show increased cellular senescence, e.g., p16, p21 and β-gal+ cells. Sod1−/− mice showed an increase in the senescence associated secretory phenotype. Dietary restriction attenuated cellular senescence and inflammation in Sod1−/− mice.
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Affiliation(s)
- Yiqiang Zhang
- Greehy Children's Cancer Institute, The University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
| | - Archana Unnikrishnan
- Department of Geriatric Medicine and the Reynolds Oklahoma Center on Aging, Oklahoma University Health Science Center, Oklahoma City, OK, USA
| | - Sathyaseelan S Deepa
- Department of Geriatric Medicine and the Reynolds Oklahoma Center on Aging, Oklahoma University Health Science Center, Oklahoma City, OK, USA
| | - Yuhong Liu
- Departments of Cellular and Structural Biology, The University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
| | - Yan Li
- Departments of Cellular and Structural Biology, The University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
| | - Yuji Ikeno
- Departments of Pathology, The University of Texas Health Science Center at San Antonio, San Antonio, TX, USA; Geriatric Research, Education and Clinical Center (GRECC), South Texas Veterans Health Care System, San Antonio, TX, USA
| | - Danuta Sosnowska
- Department of Geriatric Medicine and the Reynolds Oklahoma Center on Aging, Oklahoma University Health Science Center, Oklahoma City, OK, USA
| | - Holly Van Remmen
- Oklahoma Medical Research Foundation, Oklahoma City, OK, USA; Oklahoma City VA Medical Center, Oklahoma City, OK, USA
| | - Arlan Richardson
- Department of Geriatric Medicine and the Reynolds Oklahoma Center on Aging, Oklahoma University Health Science Center, Oklahoma City, OK, USA; Oklahoma City VA Medical Center, Oklahoma City, OK, USA.
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15
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A novel cysteine cathepsin inhibitor yields macrophage cell death and mammary tumor regression. Oncogene 2015; 34:6066-78. [PMID: 25798843 DOI: 10.1038/onc.2015.51] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2014] [Revised: 12/17/2014] [Accepted: 12/19/2014] [Indexed: 02/07/2023]
Abstract
Although cysteine cathepsins have been identified as key regulators of cancer growth, their specific role in tumor development remains unclear. Recent studies have shown that high activity levels of tumor cathepsins are primarily a result of increased cathepsin activity in cancer-promoting tumor-associated macrophages (TAMs). To further investigate the role of cysteine cathepsin activity in normal and polarized macrophages, we established in vitro and in vivo models of macrophage differentiation and polarization and used a novel cysteine cathepsin inhibitor, GB111-NH2, to block the activity of cathepsins B, L and S. Here we show that in vitro, cysteine cathepsin inhibition yields both apoptosis and proliferation of macrophages, owing to increased oxidative stress. Proteomic analysis of cathepsin- inhibited macrophages demonstrates inhibition of autophagy, suggesting a likely cause of elevated reactive oxygen species (ROS) levels. In vivo models of mammary cancer further show that cathepsin inhibition yields TAM death owing to increased ROS levels. Strikingly, apoptosis in TAMs yields a seemingly cell non-autonomous death of neighboring cancer cells, and regression of the primary growth. These results show that cysteine cathepsin inhibitors can specifically trigger macrophage cell death and may function as an effective anticancer therapy in tumors with high levels of TAMs.
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16
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Shi L, Zhao H, Ren Y, Yao X, Song R, Yue W. Effects of different levels of dietary selenium on the proliferation of spermatogonial stem cells and antioxidant status in testis of roosters. Anim Reprod Sci 2014; 149:266-72. [PMID: 25115807 DOI: 10.1016/j.anireprosci.2014.07.011] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2013] [Revised: 06/23/2014] [Accepted: 07/11/2014] [Indexed: 01/04/2023]
Abstract
The objective of this study was to investigate the different levels of dietary Se (from sodium selenite) on the proliferation of SSCs (spermatogonial stem cells) in testis of roosters. Also, the antioxidant status and Se content in blood plasma and testis were evaluated. A total of eighty 12-week-old Hy-Line Variety white roosters at an averaged body weight of 1.38 ± 0.2 kg were selected and randomly divided into four experimental groups. They were fed with the basal diet (0.044 mgSe/kg DM) supplemented with 0 (control), 0.5, 1.0 or 2.0 mgSe/kg DM (from sodium selenite). After the feeding experiment, blood and testis samples were collected for analysis of the antioxidant status and Se concentration. The testis samples were also used to examine the Thy-1 and β1-integrin mRNA expression by RT-PCR and detect the population of SSCs by immunofluorescence analysis. The results show that Se concentration in blood and testis of the animals was progressively increased with the increasing Se level in diet. The highest GSH-Px (glutathione peroxidase) activity and lowest MDA content in blood and testis was obtained in the treatment of 0.5mg/kg. RT-PCR analysis showed that mRNA expression of SSCs markers were significantly lower in the control and 1.0mg/kg groups when compared with that in the treatment of 0.5mg/kg. A similar trend was observed in the population of SSCs analyzed by immunofluorescence assay. These data suggest that dietary Se can influence the population of SSCs of roosters during spermatogenesis and that oxidative stress can modulate SSCs behavior through regulating some key factors during spermatogenesis.
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Affiliation(s)
- Lei Shi
- College of Animal Science and Technology, Shanxi Agricultural University, Taigu 030801, PR China; Lab of Animal Reproductive biotechnology, Shanxi Agricultural University, Taigu 030801, PR China.
| | - Hui Zhao
- College of Animal Science and Technology, Shanxi Agricultural University, Taigu 030801, PR China
| | - Youshe Ren
- College of Animal Science and Technology, Shanxi Agricultural University, Taigu 030801, PR China; Lab of Animal Reproductive biotechnology, Shanxi Agricultural University, Taigu 030801, PR China
| | - Xiaolei Yao
- College of Animal Science and Technology, Shanxi Agricultural University, Taigu 030801, PR China
| | - Ruigao Song
- College of Animal Science and Technology, Shanxi Agricultural University, Taigu 030801, PR China
| | - Wenbin Yue
- College of Animal Science and Technology, Shanxi Agricultural University, Taigu 030801, PR China; Lab of Animal Reproductive biotechnology, Shanxi Agricultural University, Taigu 030801, PR China
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17
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Amirshahrokhi K, Bohlooli S. Effect of methylsulfonylmethane on paraquat-induced acute lung and liver injury in mice. Inflammation 2014; 36:1111-21. [PMID: 23595869 DOI: 10.1007/s10753-013-9645-8] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Methylsulfonylmethane (MSM) is a natural organosulfur compound that exhibits antioxidative and anti-inflammatory effects. This study was carried out to investigate the effect of MSM on paraquat (PQ)-induced acute lung and liver injury in mice. A single dose of PQ (50 mg/kg, i.p.) induced acute lung and liver toxicity. Mice were treated with MSM (500 mg/kg/day, i.p.) for 5 days. At the end of the experiment, animals were euthanized, and lung and liver tissues were collected for histological and biochemical analysis. Tissue samples were used to determine malondialdehyde (MDA), myeloperoxidase (MPO), catalase (CAT), superoxide dismutase (SOD), glutathione (GSH), and tumor necrosis factor-α (TNF-α) levels. Blood samples were used to measure plasma alanine transaminase (ALT), γ-glutamyl transferase (GGT), and alkaline phosphatase (ALP). Histological examination indicated that MSM decreased lung and liver damage caused by PQ. Biochemical results showed that MSM treatment significantly reduced tissue levels of MDA, MPO, and TNF-α, while increased the levels of SOD, CAT, and GSH compared with PQ group. MSM treatment also significantly reduced plasma levels of ALT, GGT, and ALP. These findings suggest that MSM as a natural product attenuates PQ-induced pulmonary and hepatic oxidative injury.
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Affiliation(s)
- Keyvan Amirshahrokhi
- Department of Pharmacology, School of Medicine, Ardabil University of Medical Sciences, P.O. Box 5618953141, Ardabil, Iran,
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18
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Magnanou E, Malenke JR, Dearing MD. Hepatic gene expression in herbivores on diets with natural and novel plant secondary compounds. Physiol Genomics 2013; 45:774-85. [DOI: 10.1152/physiolgenomics.00033.2013] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Herbivores are predicted to evolve appropriate mechanisms to process the plant secondary compounds (PSCs) in their diet, and these mechanisms are likely specific to particular suites of PSCs. Changes in diet composition over evolutionary time should select for appropriate alterations in metabolism of the more recent dietary components. We investigated differences in gene expression profiles in the liver with respect to prior ecological and evolutionary experience with PSCs in the desert woodrat, Neotoma lepida. This woodrat species has populations in the Mojave Desert that have switched from feeding on juniper to feeding on creosote at the end of the Holocene as well as populations in the Great Basin Desert that still feed on the ancestral diet of juniper and are naïve to creosote. Juniper and creosote have notable differences in secondary chemistry. Woodrats from the Mojave and Great Basin Deserts were subjected to a fully crossed feeding trial on diets of juniper and creosote after which their livers were analyzed for gene expression. Hybridization of hepatic mRNAs to laboratory rat microarrays resulted in a total of 20,031 genes that met quality control standards. We analyzed differences in large-scale patterns of liver gene expression with respect to GO term enrichment. Diet had a larger effect on gene expression than population membership. However, woodrats with no prior evolutionary experience to the diet upregulated a greater proportion of genes indicative of physiological stress compared with those on their natural diet. This pattern may be the result of a naïve animal's attempting to mitigate physiological damage caused by novel PSCs.
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Affiliation(s)
- Elodie Magnanou
- Université Pierre et Marie Curie-Paris 6, Laboratoire ARAGO, Banyuls-sur-Mer, France
- CNRS, UMR7232, Biologie Intégrative des Organismes Marins, Banyuls-sur-Mer, France; and
- Department of Biology, University of Utah, Salt Lake City, Utah
| | - Jael R. Malenke
- Department of Biology, University of Utah, Salt Lake City, Utah
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Coto-Montes A, García-Macía M, Caballero B, Sierra V, Rodríguez-Colunga MJ, Reiter RJ, Vega-Naredo I. Analysis of constant tissue remodeling in Syrian hamster Harderian gland: intra-tubular and inter-tubular syncytial masses. J Anat 2013; 222:558-69. [PMID: 23496762 PMCID: PMC3633345 DOI: 10.1111/joa.12040] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/25/2013] [Indexed: 01/26/2023] Open
Abstract
The Syrian hamster Harderian gland (HG) has a marked sexual dimorphism and exhibits an extraordinary rate of porphyrinogenesis. The physiological oxidative stress, derived from constant porphyrin production, is so high that the HG needs additional survival autophagic mechanisms to fight against this chronic exposure, provoking the triggering of a holocrine secretion in female glands that forms two types of secretory masses: intra-tubular-syncytial and inter-tubular-syncytial masses. The aim of this work was to study the development of this inter-tubular holocrine secretion. To approach this task, we have considered that the steps developed during the formation of the so-called invasive masses consist of the growth of epithelial cells, cell detachment from the basal lamina and invasion of surrounding tissues. The presence of these masses, particularly in the female HG, are closely linked to sexual dimorphism in redox balance and to alterations in the expression of certain factors such as cytokeratins, P-cadherin, matrix metalloproteinases, cathepsin H, proliferating cell nuclear antigen, p53, CD-31 and vascular endothelial growth factor, which seem to be involved in tissue remodeling. The results document unusual mechanisms of secretion in Syrian hamster HG: an extraordinary system of massive secretion through the conjunctive tissue, disrupting the branched structure of the gland.
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Affiliation(s)
- Ana Coto-Montes
- Departamento de Morfología y Biología Celular, Facultad de Medicina, Universidad de Oviedo, Oviedo, Spain
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20
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Eichholzer M, Steinbrecher A, Kaaks R, Teucher B, Linseisen J, Rohrmann S. Effects of selenium status, dietary glucosinolate intake and serum glutathione S-transferase α activity on the risk of benign prostatic hyperplasia. BJU Int 2012; 110:E879-85. [PMID: 22882569 DOI: 10.1111/j.1464-410x.2012.11383.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
UNLABELLED Study Type--Prognosis (case control) Level of Evidence 2. What's known on the subject? and What does the study add? Geographical and ethnic differences in the distribution of BPH and the results of migrant studies indicate that not only age, androgens and genetics, but also modifiable factors may play a role in the aetiology of BPH. Oxidative stress induced by chronic inflammation could be a cause and antioxidants, including selenoproteins, may reduce the risk. The published data related to this topic are scarce and are mainly based on cross-sectional and case-control studies. In a nested case-control study, we observed a significant inverse association between serum selenium concentrations and the risk of BPH. These results need to be confirmed in larger, prospective epidemiological studies. Prostate enlargement is an increasing health problem as a result of an ageing population in many countries. Modifiable factors may also play a role. In the present study, before this antioxidant can be recommended as a preventive measure. OBJECTIVE • To determine whether geographical differences in the distribution of benign prostatic hyperplasia (BPH) and migrant studies indicate that modifiable factors play a role in the aetiology of BPH. Oxidative stress produced by chronic inflammation could represent one of the causes, and antioxidants, including selenoproteins, may reduce the risk. SUBJECTS AND METHODS • Conditional logistic regression was used to examine the associations of serum selenium and selenoprotein P concentrations and glutathione peroxidase activity with respect to the risk of BPH in a case-control study nested in the European Prospective Investigation into Cancer and Nutrition-Heidelberg cohort, including 111 cases and 214 matched controls. • In addition, dietary glucosinolate intake and the serum glutathione S-transferase α concentration was investigated. RESULTS • The risk of BPH significantly decreased with an increasing serum selenium concentration; the risk estimate was 0.83 (35% CI 0.69-0.99) per 10 µg/L increase in serum selenium concentration. • However, no significant association was present for serum selenoprotein P concentration or glutathione peroxidase activity. Risk estimates for BPH decreased with a higher intake of glucosinolates, although the results were not statistically significant. CONCLUSION • A low serum selenium concentration may increase the risk of BPH, although the findings reported in the present study need to be confirmed in larger, well-designed epidemiological studies.
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Affiliation(s)
- Monika Eichholzer
- Division of Cancer Epidemiology and Prevention, Institute of Social and Preventive Medicine University of Zurich, Z ürich, Switzerland
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21
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Effect of paraquat exposure on nitric oxide-responsive genes in rat mesencephalic cells. Nitric Oxide 2010; 23:51-9. [DOI: 10.1016/j.niox.2010.04.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2009] [Revised: 02/24/2010] [Accepted: 04/02/2010] [Indexed: 02/04/2023]
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Shibata M, Hakuno F, Yamanaka D, Okajima H, Fukushima T, Hasegawa T, Ogata T, Toyoshima Y, Chida K, Kimura K, Sakoda H, Takenaka A, Asano T, Takahashi SI. Paraquat-induced oxidative stress represses phosphatidylinositol 3-kinase activities leading to impaired glucose uptake in 3T3-L1 adipocytes. J Biol Chem 2010; 285:20915-25. [PMID: 20430890 PMCID: PMC2898352 DOI: 10.1074/jbc.m110.126482] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2010] [Indexed: 12/26/2022] Open
Abstract
Accumulated evidence indicates that oxidative stress causes and/or promotes insulin resistance; however, the mechanism by which this occurs is not fully understood. This study was undertaken to elucidate the molecular mechanism by which oxidative stress induced by paraquat impairs insulin-dependent glucose uptake in 3T3-L1 adipocytes. We confirmed that paraquat-induced oxidative stress decreased glucose transporter 4 (GLUT4) translocation to the cell surface, resulting in repression of insulin-dependent 2-deoxyglucose uptake. Under these conditions, oxidative stress did not affect insulin-dependent tyrosine phosphorylation of insulin receptor, insulin receptor substrate (IRS)-1 and -2, or binding of the phosphatidylinositol 3'-OH kinase (PI 3-kinase) p85 regulatory subunit or p110alpha catalytic subunit to each IRS. In contrast, we found that oxidative stress induced by paraquat inhibited activities of PI 3-kinase bound to IRSs and also inhibited phosphorylation of Akt, the downstream serine/threonine kinase that has been shown to play an essential role in insulin-dependent translocation of GLUT4 to the plasma membrane. Overexpression of active form Akt (myr-Akt) restored inhibition of insulin-dependent glucose uptake by paraquat, indicating that paraquat-induced oxidative stress inhibits insulin signals upstream of Akt. Paraquat treatment with and without insulin treatment decreased the activity of class Ia PI 3-kinases p110alpha and p110beta that are mainly expressed in 3T3-L1 adipocytes. However, paraquat treatment did not repress the activity of the PI 3-kinase p110alpha mutated at Cys(90) in the p85 binding region. These results indicate that the PI 3-kinase p110 is a possible primary target of paraquat-induced oxidative stress to reduce the PI 3-kinase activity and impaired glucose uptake in 3T3-L1 adipocytes.
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Affiliation(s)
- Michihiro Shibata
- From the Departments of Animal Sciences and Applied Biological Chemistry, Graduate School of Agriculture and Life Sciences, University of Tokyo, Bunkyo-ku, Tokyo 113-8657
| | - Fumihiko Hakuno
- From the Departments of Animal Sciences and Applied Biological Chemistry, Graduate School of Agriculture and Life Sciences, University of Tokyo, Bunkyo-ku, Tokyo 113-8657
| | - Daisuke Yamanaka
- From the Departments of Animal Sciences and Applied Biological Chemistry, Graduate School of Agriculture and Life Sciences, University of Tokyo, Bunkyo-ku, Tokyo 113-8657
| | - Hiroshi Okajima
- From the Departments of Animal Sciences and Applied Biological Chemistry, Graduate School of Agriculture and Life Sciences, University of Tokyo, Bunkyo-ku, Tokyo 113-8657
| | - Toshiaki Fukushima
- From the Departments of Animal Sciences and Applied Biological Chemistry, Graduate School of Agriculture and Life Sciences, University of Tokyo, Bunkyo-ku, Tokyo 113-8657
| | - Takashi Hasegawa
- From the Departments of Animal Sciences and Applied Biological Chemistry, Graduate School of Agriculture and Life Sciences, University of Tokyo, Bunkyo-ku, Tokyo 113-8657
| | - Tomomi Ogata
- From the Departments of Animal Sciences and Applied Biological Chemistry, Graduate School of Agriculture and Life Sciences, University of Tokyo, Bunkyo-ku, Tokyo 113-8657
| | - Yuka Toyoshima
- From the Departments of Animal Sciences and Applied Biological Chemistry, Graduate School of Agriculture and Life Sciences, University of Tokyo, Bunkyo-ku, Tokyo 113-8657
| | - Kazuhiro Chida
- From the Departments of Animal Sciences and Applied Biological Chemistry, Graduate School of Agriculture and Life Sciences, University of Tokyo, Bunkyo-ku, Tokyo 113-8657
| | - Kumi Kimura
- the Department of Agricultural Chemistry, Faculty of Agriculture, Meiji University, Kawasaki, Kanagawa 214-8571
| | - Hideyuki Sakoda
- the Department of Internal Medicine, Institute for Adult Diseases, Asahi Life Foundation, Chiyoda-ku, Tokyo 100-0005, and
| | - Asako Takenaka
- the Department of Agricultural Chemistry, Faculty of Agriculture, Meiji University, Kawasaki, Kanagawa 214-8571
| | - Tomoichiro Asano
- the Division of Molecular Medical Science, Graduate School of Biomedical Sciences, Hiroshima University, Minami-ku, Hiroshima 734-8553, Japan
| | - Shin-Ichiro Takahashi
- From the Departments of Animal Sciences and Applied Biological Chemistry, Graduate School of Agriculture and Life Sciences, University of Tokyo, Bunkyo-ku, Tokyo 113-8657
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23
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Yoon S, Kim TH, Natarajan A, Wang SS, Choi J, Wu J, Zern MA, Venugopal SK. Acute liver injury upregulates microRNA-491-5p in mice, and its overexpression sensitizes Hep G2 cells for tumour necrosis factor-alpha-induced apoptosis. Liver Int 2010; 30:376-87. [PMID: 20015148 DOI: 10.1111/j.1478-3231.2009.02181.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
BACKGROUND MicroRNAs (miRNAs) have emerged as novel genetic regulators of cell functions such as proliferation, apoptosis and cancer. AIMS The aim of this study was to evaluate the role of a specific miRNA in modulating hepatic cell functions. METHODS C57Bl/6 mice were administered anti-fas receptor antibodies to induce liver cell apoptosis. miRNAs were purified from the liver tissue and evaluated using an miRNA microarray. The role of miRNA-491_5p, which was overexpressed in the model, in modulating hepatic cell functions was evaluated. miRNA-491_5p was overexpressed in Hep G2 cells, followed by the addition of tumour necrosis factor (TNF)-alpha, and induction of apoptosis as well as genes involved in apoptosis pathways were evaluated. The effect of miRNA-491_5p target genes on apoptosis was also analysed by inhibiting their expression by siRNA-induced gene silencing. RESULTS Upregulation of miRNA-491_5p was found in a high-dose anti-fas receptor antibody group. Overexpression of microRNA-491_5p sensitized Hep G2 cells for TNF-alpha-induced apoptosis, and also caused an inhibition of alpha-fetoprotein, (AFP), heat shock protein-90 (hsp-90) and nuclear factor-kappaB (NF-kappaB). Overexpression of miRNA-491_5p or inhibition of AFP and hsp-90 resulted in an increased apoptosis in TNF-alpha-treated Hep G2 cells. CONCLUSIONS One of the miRNAs that is associated with the acute liver injury mouse model, miRNA-491_5p, sensitizes Hep G2 cells for TNF-alpha-induced apoptosis, at least in part, by inhibiting AFP, hsp-90 and NF-kappaB.
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Affiliation(s)
- Sangjeong Yoon
- Department of Internal Medicine: Transplant Research Program, University of California Davis Medical Center, Sacramento, CA 95817, USA
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Osterreicher J, Pejchal J, Kassa J. Alteration of Mitogen-Activated Protein Kinase Pathway After Soman Poisoning. Drug Chem Toxicol 2008; 30:283-91. [PMID: 17613012 DOI: 10.1080/01480540701380190] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
The p38 mitogen-activated protein kinase (MAPK) and activated MAPK transcription factors c-jun, c-myc, and elk-1 were investigated in rat enterocytes after sublethal poisoning with soman to study the pathogenetic mechanism of nonspecific long-term effects of nerve agents. Wistar rats were poisoned by intramuscular administration of soman at a dose 60 microg x kg(-1) (70% LD(50)) and sacrificed by cervical dislocation 3 and 5 days after poisoning. Control groups were administered physiologic saline instead of soman. Protein expression in immunohistochemically stained samples from colon transversum of control and poisoned rats was measured using image analysis. In comparison with control groups, activated p38 MAPK from soman-poisoned rats was significantly depressed at both time intervals. c-myc and c-jun expression was significantly increased 3 days after soman poisoning. On the other hand, a decrease in c-myc and c-jun expression was observed 5 days after soman poisoning. No changes in elk-1 expression were found. Long-term depression of MAPK pathway members might allow cells to proliferate in poisoned rats. This mechanism can be linked with apoptosis and carcinogenesis.
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Affiliation(s)
- Jan Osterreicher
- Department of Radiation Biology, Faculty of Military Health Sciences, University of Defense, Hradec Kralove, Czech Republic
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25
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Pejchal J, Österreicher J, Kassa J, Tichý A, Mokrý J. Activation of mitogen activated protein kinase (MAPK) pathways after soman poisoning in rat cerebellar granule neurons. J Appl Toxicol 2008; 28:689-93. [DOI: 10.1002/jat.1323] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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26
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Haga S, Terui K, Fukai M, Oikawa Y, Irani K, Furukawa H, Todo S, Ozaki M. Preventing hypoxia/reoxygenation damage to hepatocytes by p66(shc) ablation: up-regulation of anti-oxidant and anti-apoptotic proteins. J Hepatol 2008; 48:422-32. [PMID: 18191273 DOI: 10.1016/j.jhep.2007.11.018] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/18/2007] [Revised: 11/07/2007] [Accepted: 11/07/2007] [Indexed: 12/30/2022]
Abstract
BACKGROUND/AIMS Ischemia/reperfusion damage to the liver remains a serious concern in many clinical situations. Major mechanisms for this certainly include oxidative stress. METHODS The effects of ablating the p66 isoform of ShcA (p66(shc)) on hypoxia/reoxygenation (H/R)-induced oxidative stress and cell injury in hepatocytes were investigated. RESULTS Immediately after reoxygenation, AML12 cells were clearly under oxidative stress; many cells underwent apoptosis. However, knockdown of p66(shc) by specific RNAi markedly decreased cellular oxidative stress and H/R-induced apoptosis, as well as conferring resistance to H(2)O(2) insult. These data suggest that prevention of apoptosis conferred by ablation of p66(shc) results from changed ROS-scavenging, but not inhibition of ROS generation. These data were also confirmed in fibroblasts from p66(shc) knockout mice. Anti-oxidant molecules, such as MnSOD and Ref-1 and the anti-apoptotic molecule Bcl-xL were up-regulated, and pro-apoptotic FLICE was down-regulated, by ablation of p66(shc). Interestingly, catalase expression was not affected in p66(shc)-knockdown-AML12 cells although it is a major target in other cell types. CONCLUSIONS Our findings suggest that in hepatocytes, ablation of p66(shc) is cytoprotective against H/R-induced oxidative stress, with MnSOD and Ref-1 playing critical roles, and with up-regulation of Bcl-xL and down-regulation of FLICE contributing jointly to preventing cells from undergoing oxidant-induced apoptosis.
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Affiliation(s)
- Sanae Haga
- Department of Surgery, Hokkaido University School of Medicine, Sapporo, Hokkaido, Japan
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27
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Sharma M, Rai SK, Tiwari M, Chandra R. Effect of hyperhomocysteinemia on cardiovascular risk factors and initiation of atherosclerosis in Wistar rats. Eur J Pharmacol 2007; 574:49-60. [PMID: 17706635 DOI: 10.1016/j.ejphar.2007.07.022] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2007] [Revised: 06/22/2007] [Accepted: 07/04/2007] [Indexed: 10/23/2022]
Abstract
Hyperhomocysteinemia is considered an independent risk factor for atherosclerosis. The present study was designed to assess the effect of high level of serum homocysteine on other cardiovascular risk factors and markers in rats and to study its mode of action in initiating atherosclerosis. To address this issue, four different doses of methionine (0.1 g/kg, 0.25 g/kg, 0.5 g/kg, 1 g/kg) were orally administered to four groups (Group II, III, IV, V respectively) of rats (6 rats in each group) for a period of 8 weeks to get different level of homocysteine in serum. Group I was administered with saline and served as control. Our results revealed that the level of Total cholesterol, Triglyceride, and Oxidized low-density lipoproteins increased significantly with the increase in the level of serum homocysteine. The levels of Resistin, C-reactive protein and cysteinyl-leukotrienes were found to be significantly high in Group IV (P<0.001 vs Group I) and Group V (P<0.001 vs Group I) at 8 weeks. Total antioxidant capacity and nitrite/nitrate level in serum showed negative correlation with the increased dose of methionine. The mRNA expression and the enzyme activity of 3-hydroxy-3-methylglutaryl coenzyme A (HMG-CoA) reductase significantly increased only in livers of rats of Group V. Furthermore, high mRNA expression of P2 receptors and caveolin were found in aorta of rats administered with high dose of methionine (Group IV and V at 8 weeks). Data obtained from in-vitro effect of homocysteine on isolated aortic arch also showed induction in P2 receptors and caveolin with the increase in the concentration of homocysteine. These findings collectively suggest that hyperhomocysteinemia initiates atherosclerosis by modulating the cholesterol biosynthesis and by significantly inducing the level of other cardiovascular risk factors and markers, which play important role in initiating atherosclerosis.
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Affiliation(s)
- Meenakshi Sharma
- Dr. B. R. Ambedkar Center for Biomedical Research, University of Delhi, Delhi, India
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28
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Extracellular signal-regulated kinase phosphorylation due to menadione-induced arylation mediates growth inhibition of pancreas cancer cells. Cancer Chemother Pharmacol 2007; 62:315-20. [PMID: 17922126 DOI: 10.1007/s00280-007-0610-9] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2006] [Accepted: 09/17/2007] [Indexed: 10/22/2022]
Abstract
BACKGROUND Cytotoxicity of Vitamin K3 (VK3) is indicated to have the same mechanism with oxidative stress (H(2)O(2)). In the present study, we analyzed the differences and/or similarities in the cellular responses to oxidative stress and VK3 to clarify the mechanism of growth inhibition. METHODS Cell viability was determined by a test method with 3-[4, 5-dimethyl-thiazol]-2, 5-dephenyl tetrazolium bromide (MTT). Expressions of cellular proteins were evaluated by Western blot analysis. RESULTS The IC50 was calculated to be 47.3 +/- 4.1 microM for VK3 and 2.2 +/- 1.2 microM for H(2)O(2). By Western blot analysis, VK3 or H(2)O(2) was shown to induce rapid phosphorylation of extracellular signal-regulated kinase (ERK), and c-Jun N-terminal kinases (JNKs). H(2)O(2)-induced phosphorylation of ERK and JNK was almost complete inhibited by more than 100-muM genistein. VK3-induced JNK phosphorylation was blocked by 100-microM genistein, but ERK phosphorylation was not inhibited completely even if 400-microM genistein was used. H(2)O(2)-induced inhibition of cell proliferation was completely blocked by 400-microM genistein, but the VK3 effect was reduced 72.8 +/- 5.4% by the same concentration of genistein. H(2)O(2)-induced JNK phosphorylation and ERK phosphorylation were inhibited by staurosporine, protein kinase C (PKC) inhibitor. VK3-induced JNK phosphorylation was also blocked, but ERK phosphorylation was not affected. Staurosporine had no effect on VK3- or H(2)O(2)-induced growth inhibition. Treatment with a non-thiol antioxidant agent, catalase, completely abrogated H(2)O(2)-induced JNK and ERK phosphorylation, but a thiol antioxidant, L: -cystein, had no effect on phosphorylation of them. The VK3-induced JNK phosphorylation was inhibited by catalase, but not L: -cystein. But ERK phosphorylation was not inhibited by catalase and was abrogated completely by the thiol antioxidant. Catalase, but not L: -cystein, blocked H(2)O(2)-induced growth inhibition, and L: -cystein, but not catalase, blocked VK3-induced effects on cell proliferation completely. CONCLUSION VK3-induced ERK phosphorylation occurs by a different mechanism from oxidative stress, and it might have an important role to induce growth inhibition.
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Cochón AC, Della Penna AB, Kristoff G, Piol MN, San Martín de Viale LC, Verrengia Guerrero NR. Differential effects of paraquat on oxidative stress parameters and polyamine levels in two freshwater invertebrates. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2007; 68:286-92. [PMID: 17196654 DOI: 10.1016/j.ecoenv.2006.11.010] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2006] [Revised: 09/11/2006] [Accepted: 11/15/2006] [Indexed: 05/13/2023]
Abstract
Paraquat is still a widely used herbicide in several countries. Its toxic action on plants occurs through a one-electron reduction interfering with the photosynthesis process. By a similar reaction, the herbicide may induce peroxidation processes in non-target animal species. Furthermore, paraquat may interfere with the cellular transport of polyamines. The aim of this work was to investigate some aspects related to paraquat-induction of oxidative stress (lipoperoxidation, enzymatic activities of catalase and superoxide dismutase) and also the levels of polyamines (putrescine, spermidine and spermine) in two species of freshwater invertebrates, the oligochaete Lumbriculus variegatus and the gastropod Biomphalaria glabrata. The results showed that both organisms elicited differential responses. In addition, the data suggested that polyamines may play an important role against lipoperoxidation processes.
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Affiliation(s)
- A C Cochón
- Departamento de Química Biológica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Nuñez, 1428, Buenos Aires, Argentina.
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30
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Lemaire F, Mandon CA, Reboud J, Papine A, Angulo J, Pointu H, Diaz-Latoud C, Lajaunie C, Chatelain F, Arrigo AP, Schaack B. Toxicity assays in nanodrops combining bioassay and morphometric endpoints. PLoS One 2007; 2:e163. [PMID: 17235363 PMCID: PMC1769465 DOI: 10.1371/journal.pone.0000163] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2006] [Accepted: 09/18/2006] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Improved chemical hazard management such as REACH policy objective as well as drug ADMETOX prediction, while limiting the extent of animal testing, requires the development of increasingly high throughput as well as highly pertinent in vitro toxicity assays. METHODOLOGY This report describes a new in vitro method for toxicity testing, combining cell-based assays in nanodrop Cell-on-Chip format with the use of a genetically engineered stress sensitive hepatic cell line. We tested the behavior of a stress inducible fluorescent HepG2 model in which Heat Shock Protein promoters controlled Enhanced-Green Fluorescent Protein expression upon exposure to Cadmium Chloride (CdCl2), Sodium Arsenate (NaAsO2) and Paraquat. In agreement with previous studies based on a micro-well format, we could observe a chemical-specific response, identified through differences in dynamics and amplitude. We especially determined IC50 values for CdCl2 and NaAsO2, in agreement with published data. Individual cell identification via image-based screening allowed us to perform multiparametric analyses. CONCLUSIONS Using pre/sub lethal cell stress instead of cell mortality, we highlighted the high significance and the superior sensitivity of both stress promoter activation reporting and cell morphology parameters in measuring the cell response to a toxicant. These results demonstrate the first generation of high-throughput and high-content assays, capable of assessing chemical hazards in vitro within the REACH policy framework.
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Affiliation(s)
- Frédéric Lemaire
- Commissariat à l'Energie Atomique, DSV, Cellular Responses and Dynamics Department, Laboratoire Biopuces, Commissariat à l'Energie Atomique Centre de Grenoble, Grenoble, France
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