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Valente LC, Bacil GP, Riechelmann-Casarin L, Barbosa GC, Barbisan LF, Romualdo GR. Exploring in vitro modeling in hepatocarcinogenesis research: morphological and molecular features and similarities to the corresponding human disease. Life Sci 2024; 351:122781. [PMID: 38848937 DOI: 10.1016/j.lfs.2024.122781] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2024] [Revised: 04/04/2024] [Accepted: 06/04/2024] [Indexed: 06/09/2024]
Abstract
The hepatocellular carcinoma (HCC) features a remarkable epidemiological burden, ranking as the third most lethal cancer worldwide. As the HCC-related molecular and cellular complexity unfolds as the disease progresses, the use of a myriad of in vitro models available is mandatory in translational preclinical research setups. In this review paper, we will compile cutting-edge information on the in vitro bioassays for HCC research, (A) emphasizing their morphological and molecular parallels with human HCC; (B) delineating the advantages and limitations of their application; and (C) offering perspectives on their prospective applications. While bidimensional (2D) (co) culture setups provide a rapid low-cost strategy for metabolism and drug screening investigations, tridimensional (3D) (co) culture bioassays - including patient-derived protocols as organoids and precision cut slices - surpass some of the 2D strategies limitations, mimicking the complex microarchitecture and cellular and non-cellular microenvironment observed in human HCC. 3D models have become invaluable tools to unveil HCC pathophysiology and targeted therapy. In both setups, the recapitulation of HCC in different etiologies/backgrounds (i.e., viral, fibrosis, and fatty liver) may be considered as a fundamental guide for obtaining translational findings. Therefore, a "multimodel" approach - encompassing the advantages of different in vitro bioassays - is encouraged to circumvent "model-biased" outcomes in preclinical HCC research.
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Affiliation(s)
- Leticia Cardoso Valente
- São Paulo State University (UNESP), Medical School, Botucatu, Experimental Research Unit (UNIPEX), Brazil
| | - Gabriel Prata Bacil
- São Paulo State University (UNESP), Institute of Biosciences, Botucatu, Department of Structural and Functional Biology, Brazil
| | - Luana Riechelmann-Casarin
- São Paulo State University (UNESP), Medical School, Botucatu, Experimental Research Unit (UNIPEX), Brazil
| | | | - Luís Fernando Barbisan
- São Paulo State University (UNESP), Institute of Biosciences, Botucatu, Department of Structural and Functional Biology, Brazil
| | - Guilherme Ribeiro Romualdo
- São Paulo State University (UNESP), Medical School, Botucatu, Experimental Research Unit (UNIPEX), Brazil.
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2
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Ock SA, Kim SY, Kim YI, Ju WS, Lee P. Enhanced In Vitro Recapitulation of In Vivo Liver Regeneration by Co-Culturing Hepatocyte Organoids with Adipose-Derived Mesenchymal Stem Cells, Alleviating Steatosis and Apoptosis in Acute Alcoholic Liver Injury. Cells 2024; 13:1303. [PMID: 39120332 PMCID: PMC11311897 DOI: 10.3390/cells13151303] [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: 06/26/2024] [Revised: 08/01/2024] [Accepted: 08/02/2024] [Indexed: 08/10/2024] Open
Abstract
Hepatocyte organoids (HOs) have superior hepatic functions to cholangiocyte-derived organoids but suffer from shorter lifespans. To counteract this, we co-cultured pig HOs with adipose-derived mesenchymal stem cells (A-MSCs) and performed transcriptome analysis. The results revealed that A-MSCs enhanced the collagen synthesis pathways, which are crucial for maintaining the three-dimensional structure and extracellular matrix synthesis of the organoids. A-MSCs also increased the expression of liver progenitor cell markers (KRT7, SPP1, LGR5+, and TERT). To explore HOs as a liver disease model, we exposed them to alcohol to create an alcoholic liver injury (ALI) model. The co-culture of HOs with A-MSCs inhibited the apoptosis of hepatocytes and reduced lipid accumulation of HOs. Furthermore, varying ethanol concentrations (0-400 mM) and single-versus-daily exposure to HOs showed that daily exposure significantly increased the level of PLIN2, a lipid storage marker, while decreasing CYP2E1 and increasing CYP1A2 levels, suggesting that CYP1A2 may play a critical role in alcohol detoxification during short-term exposure. Moreover, daily alcohol exposure led to excessive lipid accumulation and nuclear fragmentation in HOs cultured alone. These findings indicate that HOs mimic in vivo liver regeneration, establishing them as a valuable model for studying liver diseases, such as ALI.
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Affiliation(s)
- Sun A Ock
- Animal Biotechnology Division, National Institute of Animal Science, Rural Development Administration, 1500 Kongjwipatjwi-ro, Iseo-myeon, Wanju-gun 55365, Republic of Korea (P.L.)
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Zhang Y, Zhao H, Fu X, Wang K, Yang J, Zhang X, Wang H. The role of hydrogen sulfide regulation of pyroptosis in different pathological processes. Eur J Med Chem 2024; 268:116254. [PMID: 38377826 DOI: 10.1016/j.ejmech.2024.116254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Revised: 01/31/2024] [Accepted: 02/15/2024] [Indexed: 02/22/2024]
Abstract
Pyroptosis is one kind of programmed cell death in which the cell membrane ruptures and subsequently releases cell contents and pro-inflammatory cytokines including IL-1β and IL-18. Pyroptosis is caused by many types of pathological stimuli, such as hyperglycemia (HG), oxidative stress, and inflammation, and is mediated by gasdermin (GSDM) protein family. Increasing evidence indicates that pyroptosis plays an important role in multiple diseases, such as cancer, kidney diseases, inflammatory diseases, and cardiovascular diseases. Therefore, the regulation of pyroptosis is crucial for the occurrence, development, and treatment of many diseases. Hydrogen sulfide (H2S) is a biologically active gasotransmitter following carbon monoxide (CO) and nitrogen oxide (NO) in mammalian tissues. So far, three enzymes, including 3-mercaptopyruvate sulphurtransferase (3-MST), cystathionine γ- Lyase (CSE), and Cystine β-synthesis enzyme (CBS), have been found to catalyze the production of endogenous H2S in mammals. H2S has been reported to have multiple biological functions including anti-inflammation, anti-oxidative stress, anti-apoptosis and so on. Hence, H2S is involved in various physiological and pathological processes. In recent years, many studies have demonstrated that H2S plays a critical role by regulating pyroptosis in various pathological processes, such as ischemia-reperfusion injury, alcoholic liver disease, and diabetes cardiomyopathy. However, the relevant mechanism has not been completely understood. Therefore, elucidating the mechanism by which H2S regulates pyroptosis in diseases will help understand the pathogenesis of multiple diseases and provide important new avenues for the treatment of many diseases. Here, we reviewed the progress of H2S regulation of pyroptosis in different pathological processes, and analyzed the molecular mechanism in detail to provide a theoretical reference for future related research.
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Affiliation(s)
- Yanting Zhang
- School of Basic Medical Sciences, Henan University, Kaifeng, Henan, 475004, China; School of Clinical Medicine, Henan University, Kaifeng, Henan, 475004, China
| | - Huijie Zhao
- Institute of Chronic Disease Risks Assessment, Henan University, Jinming Avenue, Kaifeng, 475004, China
| | - Xiaodi Fu
- School of Basic Medical Sciences, Henan University, Kaifeng, Henan, 475004, China
| | - Kexiao Wang
- School of Clinical Medicine, Henan University, Kaifeng, Henan, 475004, China
| | - Jiahao Yang
- School of Clinical Medicine, Henan University, Kaifeng, Henan, 475004, China
| | | | - Honggang Wang
- School of Basic Medical Sciences, Henan University, Kaifeng, Henan, 475004, China.
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Elbadawy M, Tanabe K, Yamamoto H, Ishihara Y, Mochizuki M, Abugomaa A, Yamawaki H, Kaneda M, Usui T, Sasaki K. Evaluation of the efficacy of mitochondrial fission inhibitor (Mdivi-1) using non-alcoholic steatohepatitis (NASH) liver organoids. Front Pharmacol 2023; 14:1243258. [PMID: 37900170 PMCID: PMC10600465 DOI: 10.3389/fphar.2023.1243258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Accepted: 09/28/2023] [Indexed: 10/31/2023] Open
Abstract
Non-alcoholic steatohepatitis (NASH) is known to progress to cirrhosis and hepatocellular carcinoma in some patients. Although NASH is associated with abnormal mitochondrial function related to lipid metabolism, mechanisms for the development and effective treatments are still unclear. Therefore, new approaches to elucidate the pathophysiology are needed. In the previous study, we generated liver organoids from different stages of NASH model mice that could recapitulate the part of NASH pathology. In the present study, we investigated the relationship between mitochondrial function and NASH disease by comparing NASH liver organoids (NLO) and control liver organoids (CLO). Compared with CLO, mitochondrial and organoid morphology was abnormal in NLO, with increased expression of mitochondrial mitogen protein, DRP1, and mitochondria-derived reactive oxygen species (ROS) production. Treatment of NLO with a DPR1 inhibitor, Mdivi-1 resulted in the improvement of morphology and the decreased expression of fibrosis-related markers, Col1a1 and Acta2. In addition, treatment of NASH model mice with Mdivi-1 showed a decrease in fatty liver. Mdivi-1 treatment also prevented fibrosis and ROS production in the liver. These results indicate that NLO undergoes enhanced metabolism and abnormal mitochondrial morphology compared with CLO. It was also suggested that Mdivi-1 may be useful as a therapeutic agent to ameliorate NASH pathology.
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Affiliation(s)
- Mohamed Elbadawy
- Laboratory of Veterinary Pharmacology, Department of Veterinary Medicine, Faculty of Agriculture, Tokyo University of Agriculture and Technology, Tokyo, Japan
- Department of Pharmacology, Faculty of Veterinary Medicine, Benha University, Benha, Egypt
- Department of Pathology, College of Veterinary Medicine, University of Georgia, Athens, GA, United States
| | - Kiwamu Tanabe
- Laboratory of Veterinary Pharmacology, Department of Veterinary Medicine, Faculty of Agriculture, Tokyo University of Agriculture and Technology, Tokyo, Japan
| | - Haru Yamamoto
- Laboratory of Veterinary Pharmacology, Department of Veterinary Medicine, Faculty of Agriculture, Tokyo University of Agriculture and Technology, Tokyo, Japan
| | - Yusuke Ishihara
- Laboratory of Veterinary Pharmacology, Department of Veterinary Medicine, Faculty of Agriculture, Tokyo University of Agriculture and Technology, Tokyo, Japan
| | - Maria Mochizuki
- Laboratory of Veterinary Pharmacology, Department of Veterinary Medicine, Faculty of Agriculture, Tokyo University of Agriculture and Technology, Tokyo, Japan
| | - Amira Abugomaa
- Laboratory of Veterinary Pharmacology, Department of Veterinary Medicine, Faculty of Agriculture, Tokyo University of Agriculture and Technology, Tokyo, Japan
- Faculty of Veterinary Medicine, Mansoura University, Mansoura, Egypt
| | - Hideyuki Yamawaki
- Laboratory of Veterinary Pharmacology, School of Veterinary Medicine, Kitasato University, Aomori, Japan
| | - Masahiro Kaneda
- Laboratory of Veterinary Anatomy, Department of Veterinary Medicine, Faculty of Agriculture, Tokyo University of Agriculture and Technology, Fuchu, Japan
| | - Tatsuya Usui
- Laboratory of Veterinary Pharmacology, Department of Veterinary Medicine, Faculty of Agriculture, Tokyo University of Agriculture and Technology, Tokyo, Japan
| | - Kazuaki Sasaki
- Laboratory of Veterinary Pharmacology, Department of Veterinary Medicine, Faculty of Agriculture, Tokyo University of Agriculture and Technology, Tokyo, Japan
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Baez-Gonzalez AS, Carrazco-Carrillo JA, Figueroa-Gonzalez G, Quintas-Granados LI, Padilla-Benavides T, Reyes-Hernandez OD. Functional effect of indole-3 carbinol in the viability and invasive properties of cultured cancer cells. Biochem Biophys Rep 2023; 35:101492. [PMID: 37304131 PMCID: PMC10250583 DOI: 10.1016/j.bbrep.2023.101492] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Revised: 04/16/2023] [Accepted: 05/18/2023] [Indexed: 06/13/2023] Open
Abstract
Cancer treatment typically involves multiple strategies, such as surgery, radiotherapy, and chemotherapy, to remove tumors. However, chemotherapy often causes side effects, and there is a constant search for new drugs to alleviate them. Natural compounds are a promising alternative to this problem. Indole-3-carbinol (I3C) is a natural antioxidant agent that has been studied as a potential cancer treatment. I3C is an agonist of the aryl hydrocarbon receptor (AhR), a transcription factor that plays a role in the expression of genes related to development, immunity, circadian rhythm, and cancer. In this study, we investigated the effect of I3C on cell viability, migration, invasion properties, as well as mitochondrial integrity in hepatoma, breast, and cervical cancer cell lines. We found that all tested cell lines showed impaired carcinogenic properties and alterations in mitochondrial membrane potential after treatment with I3C. These results support the potential use of I3C as a supplementary treatment for various types of cancer.
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Affiliation(s)
- Andrea S. Baez-Gonzalez
- Wesleyan University, 52 Lawn Ave, Middletown, CT, 06459, USA
- Universidad Nacional Autónoma de Mexico, Facultad de Estudios Superiores Zaragoza, Mexico City, Mexico
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Li Y, Li P, Yu X, Zheng X, Gu Q. Exploitation of In Vivo-Emulated In Vitro System in Advanced Food Science. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023. [PMID: 37023249 DOI: 10.1021/acs.jafc.2c07289] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/19/2023]
Abstract
Reasonable model construction contributes to the accuracy of experimental results. Multiple in vivo models offer reliable choices for effective evaluation, whereas their applications are hampered due to adverse features including high time-consumption, high cost and ethical contradictions. In vivo-emulated in vitro systems (IVE systems) have experienced rapid development and have been brought into food science for about two decades. IVE systems' flexibly gathers the strengths of in vitro and in vivo models into one, reflecting the results in an efficient, systematic and interacted manner. In this review, we comprehensively reviewed the current research progress of IVE systems based on the literature published in the recent two decades. By categorizing the IVE systems into 2D coculture models, spheroids and organoids, their applications were systematically summarized and typically exemplified. The pros and cons of IVE systems were also thoroughly discussed, drawing attention to present challenges and inspiring potential orientation and future perspectives. The wide applicability and multiple possibilities suggest IVE systems as an effective and persuasive platform in the future of advanced food science.
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Affiliation(s)
- Yonglu Li
- School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou 310018, Zhejiang, People's Republic of China
- Key Laboratory for Food Microbial Technology of Zhejiang Province, Hangzhou, 310018, Zhejiang, People's Republic of China
| | - Ping Li
- School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou 310018, Zhejiang, People's Republic of China
- Key Laboratory for Food Microbial Technology of Zhejiang Province, Hangzhou, 310018, Zhejiang, People's Republic of China
| | - Xin Yu
- Department of Food Science and Nutrition, Zhejiang University, Hangzhou 310058, People's Republic of China
- Zhejiang Key Laboratory for Agro-food Processing, Fuli Institute of Food Science, and National Engineering Laboratory of Intelligent Food Technology and Equipment, Zhejiang University, Hangzhou 310058, People's Republic of China
| | - Xiaodong Zheng
- Department of Food Science and Nutrition, Zhejiang University, Hangzhou 310058, People's Republic of China
- Zhejiang Key Laboratory for Agro-food Processing, Fuli Institute of Food Science, and National Engineering Laboratory of Intelligent Food Technology and Equipment, Zhejiang University, Hangzhou 310058, People's Republic of China
| | - Qing Gu
- School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou 310018, Zhejiang, People's Republic of China
- Key Laboratory for Food Microbial Technology of Zhejiang Province, Hangzhou, 310018, Zhejiang, People's Republic of China
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Nikonorova VG, Chrishtop VV, Mironov VA, Prilepskii AY. Advantages and Potential Benefits of Using Organoids in Nanotoxicology. Cells 2023; 12:cells12040610. [PMID: 36831277 PMCID: PMC9954166 DOI: 10.3390/cells12040610] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2022] [Revised: 02/10/2023] [Accepted: 02/11/2023] [Indexed: 02/16/2023] Open
Abstract
Organoids are microtissues that recapitulate the complex structural organization and functions of tissues and organs. Nanoparticles have several specific properties that must be considered when replacing animal models with in vitro studies, such as the formation of a protein corona, accumulation, ability to overcome tissue barriers, and different severities of toxic effects in different cell types. An increase in the number of articles on toxicology research using organoid models is related to an increase in publications on organoids in general but is not related to toxicology-based publications. We demonstrate how the quantitative assessment of toxic changes in the structure of organoids and the state of their cell collections provide more valuable results for toxicological research and provide examples of research methods. The impact of the tested materials on organoids and their differences are also discussed. In conclusion, we highlight the main challenges, the solution of which will allow researchers to approach the replacement of in vivo research with in vitro research: biobanking and standardization of the structural characterization of organoids, and the development of effective screening imaging techniques for 3D organoid cell organization.
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Luo Z, Wang Y, Pang S, Gao S, Liu N, Gao X, Zhang L, Qi X, Yang Y, Zhang L. Synthesis and Bioactivity Evaluation of a Novel 1,2,4-Oxadiazole Derivative in vitro and in 3×Tg Mice. Drug Des Devel Ther 2022; 16:3285-3296. [PMID: 36187086 PMCID: PMC9521684 DOI: 10.2147/dddt.s372750] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2022] [Accepted: 08/22/2022] [Indexed: 11/30/2022] Open
Abstract
Aim Alzheimer’s disease (AD) is the most common neurodegenerative disease whose patients suffered from cognitive impairments. In our study, a novel 1,2,4-Oxadiazole derivative wyc-7-20 was synthesized, which showed low cytotoxicity and potent neuroprotective effect at the cellular level. Improved cognitive impairments, β-amyloid (Aβ) clearance, and tau pathological phenotypes were detected in transgenic animal models after wyc-7-20 treatment. Reversed expressions in AD-related genes were also detected. The results demonstrated wyc-7-20 was potent in AD therapy. Purpose The pathological complexity of AD increased difficulties in medical research. To explore a new potential medical treatment for AD, a novel 1,2,4-Oxadiazole derivative (wyc-7-20) was designed, synthesized to explore the application in this study. Materials and Methods Human neuroblastoma (SH-SY5Y) cells and human hepatocellular carcinoma (HepG2) cells were used to detect median lethal dose (LD50). H2O2 and Aβ1–42 oligomers (AβOs) were respectively, added into SH-SY5Y cells to detect anti-ROS (reactive oxygen species) and anti-AβOs effects of wyc-7-20. 3×Tg mice were administered with wyc-7-20, and then Y maze test and Morris water maze (MWM) test were applied to detect cognitive improvements. Brain tissue samples were subsequently collected and analyzed using different techniques. Results wyc-7-20 showed low cytotoxicity and potent neuroprotective effect at the cellular level. Improved cognitive impairments, Aβ clearance, and tau pathological phenotypes were detected in transgenic animal models after wyc-7-20 treatment. Reversed expressions in AD-related genes were also detected. Conclusion wyc-7-20 was potent in AD therapy.
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Affiliation(s)
- Zhuohui Luo
- Key Laboratory of Human Disease Comparative Medicine, National Health Commission of China (NHC), Institute of Laboratory Animal Science, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, 100021, People’s Republic of China
| | - Yongcheng Wang
- Beijing Key Laboratory of Active Substance Discovery and Drug Ability Evaluation, Institute of Material Medical, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, 100050, People’s Republic of China
| | - Shuo Pang
- Key Laboratory of Human Disease Comparative Medicine, National Health Commission of China (NHC), Institute of Laboratory Animal Science, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, 100021, People’s Republic of China
| | - Shan Gao
- Key Laboratory of Human Disease Comparative Medicine, National Health Commission of China (NHC), Institute of Laboratory Animal Science, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, 100021, People’s Republic of China
| | - Ning Liu
- Key Laboratory of Human Disease Comparative Medicine, National Health Commission of China (NHC), Institute of Laboratory Animal Science, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, 100021, People’s Republic of China
| | - Xiang Gao
- Key Laboratory of Human Disease Comparative Medicine, National Health Commission of China (NHC), Institute of Laboratory Animal Science, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, 100021, People’s Republic of China
| | - Li Zhang
- Key Laboratory of Human Disease Comparative Medicine, National Health Commission of China (NHC), Institute of Laboratory Animal Science, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, 100021, People’s Republic of China
- Neuroscience Center, Chinese Academy of Medical Sciences, Beijing, 100730, People’s Republic of China
| | - Xiaolong Qi
- Key Laboratory of Human Disease Comparative Medicine, National Health Commission of China (NHC), Institute of Laboratory Animal Science, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, 100021, People’s Republic of China
- Neuroscience Center, Chinese Academy of Medical Sciences, Beijing, 100730, People’s Republic of China
| | - Yajun Yang
- Beijing Key Laboratory of Active Substance Discovery and Drug Ability Evaluation, Institute of Material Medical, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, 100050, People’s Republic of China
- Correspondence: Yajun Yang, Institute of Material Medical, Peking Union Medical College, Chinese Academy of Medical Sciences, Nanwei Road, Xicheng District, Beijing, 100050, People’s Republic of China, Email
| | - Lianfeng Zhang
- Key Laboratory of Human Disease Comparative Medicine, National Health Commission of China (NHC), Institute of Laboratory Animal Science, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, 100021, People’s Republic of China
- Neuroscience Center, Chinese Academy of Medical Sciences, Beijing, 100730, People’s Republic of China
- Lianfeng Zhang, Institute of Laboratory Animal Science, Peking Union Medical College, Chinese Academy of Medical Sciences, Panjiayuan Nanli, Chaoyang District, Beijing, 100021, People’s Republic of China, Tel +86 10-87778442, Fax +86 10-67776394, Email
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Olea-Flores M, Kan J, Carlson A, Syed SA, McCann C, Mondal V, Szady C, Ricker HM, McQueen A, Navea JG, Caromile LA, Padilla-Benavides T. ZIP11 Regulates Nuclear Zinc Homeostasis in HeLa Cells and Is Required for Proliferation and Establishment of the Carcinogenic Phenotype. Front Cell Dev Biol 2022; 10:895433. [PMID: 35898402 PMCID: PMC9309433 DOI: 10.3389/fcell.2022.895433] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2022] [Accepted: 06/13/2022] [Indexed: 12/12/2022] Open
Abstract
Zinc (Zn) is an essential trace element that plays a key role in several biological processes, including transcription, signaling, and catalysis. A subcellular network of transporters ensures adequate distribution of Zn to facilitate homeostasis. Among these are a family of importers, the Zrt/Irt-like proteins (ZIP), which consists of 14 members (ZIP1-ZIP14) that mobilize Zn from the extracellular domain and organelles into the cytosol. Expression of these transporters varies among tissues and during developmental stages, and their distribution at various cellular locations is essential for defining the net cellular Zn transport. Normally, the ion is bound to proteins or sequestered in organelles and vesicles. However, though research has focused on Zn internalization in mammalian cells, little is known about Zn mobilization within organelles, including within the nuclei under both normal and pathological conditions. Analyses from stomach and colon tissues isolated from mouse suggested that ZIP11 is the only ZIP transporter localized to the nucleus of mammalian cells, yet no clear cellular role has been attributed to this protein. We hypothesized that ZIP11 is essential to maintaining nuclear Zn homeostasis in mammalian cells. To test this, we utilized HeLa cells, as research in humans correlated elevated expression of ZIP11 with poor prognosis in cervical cancer patients. We stably knocked down ZIP11 in HeLa cancer cells and investigated the effect of Zn dysregulation in vitro. Our data show that ZIP11 knockdown (KD) reduced HeLa cells proliferation due to nuclear accumulation of Zn. RNA-seq analyses revealed that genes related to angiogenesis, apoptosis, mRNA metabolism, and signaling pathways are dysregulated. Although the KD cells undergoing nuclear Zn stress can activate the homeostasis response by MTF1 and MT1, the RNA-seq analyses showed that only ZIP14 (an importer expressed on the plasma membrane and endocytic vesicles) is mildly induced, which may explain the sensitivity to elevated levels of extracellular Zn. Consequently, ZIP11 KD HeLa cells have impaired migration, invasive properties and decreased mitochondrial potential. Furthermore, KD of ZIP11 delayed cell cycle progression and rendered an enhanced senescent state in HeLa cells, pointing to a novel mechanism whereby maintenance of nuclear Zn homeostasis is essential for cancer progression.
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Affiliation(s)
- Monserrat Olea-Flores
- Department of Molecular Biology and Biochemistry, Wesleyan University, Middletown, CT, United States
- Department of Biochemistry and Molecular Biotechnology, University of Massachusetts Chan Medical School, Worcester, MA, United States
| | - Julia Kan
- Department of Molecular Biology and Biochemistry, Wesleyan University, Middletown, CT, United States
| | - Alyssa Carlson
- Department of Molecular Biology and Biochemistry, Wesleyan University, Middletown, CT, United States
| | - Sabriya A. Syed
- Department of Biochemistry and Molecular Biotechnology, University of Massachusetts Chan Medical School, Worcester, MA, United States
| | - Cat McCann
- Department of Molecular Biology and Biochemistry, Wesleyan University, Middletown, CT, United States
| | - Varsha Mondal
- Department of Molecular Biology and Biochemistry, Wesleyan University, Middletown, CT, United States
| | - Cecily Szady
- Department of Chemistry, Skidmore College, Saratoga Springs, NY, United States
| | - Heather M. Ricker
- Department of Chemistry, Skidmore College, Saratoga Springs, NY, United States
| | - Amy McQueen
- Department of Molecular Biology and Biochemistry, Wesleyan University, Middletown, CT, United States
| | - Juan G. Navea
- Department of Chemistry, Skidmore College, Saratoga Springs, NY, United States
| | - Leslie A. Caromile
- Department of Cell Biology, Center for Vascular Biology, UCONN Health-Center, Farmington, CT, United States
| | - Teresita Padilla-Benavides
- Department of Molecular Biology and Biochemistry, Wesleyan University, Middletown, CT, United States
- *Correspondence: Teresita Padilla-Benavides,
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Sun X, Shi J, Kong L, Shen Q, Zeng X, Wu Z, Guo Y, Pan D. Recent insights into the hepatoprotective effects of lactic acid bacteria in alcoholic liver disease. Trends Food Sci Technol 2022. [DOI: 10.1016/j.tifs.2022.05.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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11
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Ethanol Metabolism in the Liver, the Induction of Oxidant Stress, and the Antioxidant Defense System. Antioxidants (Basel) 2022; 11:antiox11071258. [PMID: 35883749 PMCID: PMC9312216 DOI: 10.3390/antiox11071258] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2022] [Revised: 06/18/2022] [Accepted: 06/20/2022] [Indexed: 12/12/2022] Open
Abstract
The liver metabolizes ethanol through three enzymatic pathways: alcohol dehydrogenase (ADH), cytochrome p450 (also called MEOS), and catalase. Alcohol dehydrogenase class I (ADH1) is considered the most important enzyme for the metabolism of ethanol, MEOS and catalase (CAT) are considered minor alternative pathways. However, contradicting experiments suggest that the non-ADH1 pathway may have a greater relevance for the metabolism of ethanol than previously thought. In some conditions, ethanol is predominately metabolized to acetaldehyde via cytochrome P450 family 2 (CYP2E1), which is involved in the generation of reactive oxygen species (ROS), mainly through electron leakage to oxygen to form the superoxide (O2•−) radical or in catalyzed lipid peroxidation. The CAT activity can also participate in the ethanol metabolism that produces ROS via ethanol directly reacting with the CAT-H2O2 complex, producing acetaldehyde and water and depending on the H2O2 availability, which is the rate-limiting component in ethanol peroxidation. We have shown that CAT actively participates in lactate-stimulated liver ethanol oxidation, where the addition of lactate generates H2O2, which is used by CAT to oxidize ethanol to acetaldehyde. Therefore, besides its known role as a catalytic antioxidant component, the primary role of CAT could be to function in the metabolism of xenobiotics in the liver.
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Choy Buentello D, Koch LS, Trujillo-de Santiago G, Alvarez MM, Broersen K. Use of standard U-bottom and V-bottom well plates to generate neuroepithelial embryoid bodies. PLoS One 2022; 17:e0262062. [PMID: 35536781 PMCID: PMC9089918 DOI: 10.1371/journal.pone.0262062] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Accepted: 04/08/2022] [Indexed: 11/19/2022] Open
Abstract
The use of organoids has become increasingly popular recently due to their self-organizing abilities, which facilitate developmental and disease modeling. Various methods have been described to create embryoid bodies (EBs) generated from embryonic or pluripotent stem cells but with varying levels of differentiation success and producing organoids of variable size. Commercial ultra-low attachment (ULA) V-bottom well plates are frequently used to generate EBs. These plates are relatively expensive and not as widely available as standard concave well plates. Here, we describe a cost-effective and low labor-intensive method that creates homogeneous EBs at high yield in standard V- and U-bottom well plates by applying an anti-adherence solution to reduce surface attachment, followed by centrifugation to enhance cellular aggregation. We also explore the effect of different seeding densities, in the range of 1 to 11 ×103 cells per well, for the fabrication of neuroepithelial EBs. Our results show that the use of V-bottom well plates briefly treated with anti-adherent solution (for 5 min at room temperature) consistently yields functional neural EBs in the range of seeding densities from 5 to 11×103 cells per well. A brief post-seeding centrifugation step further enhances EB establishment. EBs fabricated using centrifugation exhibited lower variability in their final size than their non-centrifuged counterparts, and centrifugation also improved EB yield. The span of conditions for reliable EB production is narrower in U-bottom wells than in V-bottom wells (i.e., seeding densities between 7×103 and 11×103 and using a centrifugation step). We show that EBs generated by the protocols introduced here successfully developed into neural organoids and expressed the relevant markers associated with their lineages. We anticipate that the cost-effective and easily implemented protocols presented here will greatly facilitate the generation of EBs, thereby further democratizing the worldwide ability to conduct organoid-based research.
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Affiliation(s)
- David Choy Buentello
- Centro de Biotecnología-FEMSA, Tecnologico de Monterrey, Monterrey, NL, México
- Departamento de Bioingeniería, Tecnologico de Monterrey, Monterrey, NL, México
- Department of Applied Stem Cell Technologies, TechMed Centre Enschede, University of Twente, Enschede, The Netherlands
| | - Lena Sophie Koch
- Department of Applied Stem Cell Technologies, TechMed Centre Enschede, University of Twente, Enschede, The Netherlands
| | - Grissel Trujillo-de Santiago
- Centro de Biotecnología-FEMSA, Tecnologico de Monterrey, Monterrey, NL, México
- Departamento de Ingeniería Mecatrónica y Eléctrica, Tecnologico de Monterrey, Monterrey, NL, México
| | - Mario Moisés Alvarez
- Centro de Biotecnología-FEMSA, Tecnologico de Monterrey, Monterrey, NL, México
- Departamento de Bioingeniería, Tecnologico de Monterrey, Monterrey, NL, México
- * E-mail: (MMA); (KB)
| | - Kerensa Broersen
- Department of Applied Stem Cell Technologies, TechMed Centre Enschede, University of Twente, Enschede, The Netherlands
- * E-mail: (MMA); (KB)
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Torres S, Segalés P, García-Ruiz C, Fernández-Checa JC. Mitochondria and the NLRP3 Inflammasome in Alcoholic and Nonalcoholic Steatohepatitis. Cells 2022; 11:1475. [PMID: 35563780 PMCID: PMC9105698 DOI: 10.3390/cells11091475] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2022] [Revised: 04/18/2022] [Accepted: 04/25/2022] [Indexed: 12/12/2022] Open
Abstract
Alcoholic (ASH) and nonalcoholic steatohepatitis (NASH) are advanced stages of fatty liver disease and two of the most prevalent forms of chronic liver disease. ASH and NASH are associated with significant risk of further progression to cirrhosis and hepatocellular carcinoma (HCC), the most common type of liver cancer, and a major cause of cancer-related mortality. Despite extensive research and progress in the last decades to elucidate the mechanisms of the development of ASH and NASH, the pathogenesis of both diseases is still poorly understood. Mitochondrial damage and activation of inflammasome complexes have a role in inducing and sustaining liver damage. Mitochondrial dysfunction produces inflammatory factors that activate the inflammasome complexes. NLRP3 inflammasome (nucleotide-binding oligomerization domain-like receptor protein 3) is a multiprotein complex that activates caspase 1 and the release of pro-inflammatory cytokines, including interleukin-1β (IL-1β) and interleukin-18 (IL-18), and contributes to inflammatory pyroptotic cell death. The present review, which is part of the issue "Mitochondria in Liver Pathobiology", provides an overview of the role of mitochondrial dysfunction and NLRP3 activation in ASH and NASH.
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Affiliation(s)
- Sandra Torres
- Department of Cell Death and Proliferation, Institute of Biomedical Research of Barcelona (IIBB), Spanish National Research Council (CSIC), 08036 Barcelona, Spain; (S.T.); (P.S.)
- Liver Unit, Hospital Clinic I Provincial de Barcelona, Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), 08036 Barcelona, Spain
- Center for the Study of Liver and Gastrointestinal Diseases (CIBERehd), Carlos III National Institute of Health, 28029 Madrid, Spain
| | - Paula Segalés
- Department of Cell Death and Proliferation, Institute of Biomedical Research of Barcelona (IIBB), Spanish National Research Council (CSIC), 08036 Barcelona, Spain; (S.T.); (P.S.)
- Liver Unit, Hospital Clinic I Provincial de Barcelona, Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), 08036 Barcelona, Spain
- Center for the Study of Liver and Gastrointestinal Diseases (CIBERehd), Carlos III National Institute of Health, 28029 Madrid, Spain
| | - Carmen García-Ruiz
- Department of Cell Death and Proliferation, Institute of Biomedical Research of Barcelona (IIBB), Spanish National Research Council (CSIC), 08036 Barcelona, Spain; (S.T.); (P.S.)
- Liver Unit, Hospital Clinic I Provincial de Barcelona, Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), 08036 Barcelona, Spain
- Center for the Study of Liver and Gastrointestinal Diseases (CIBERehd), Carlos III National Institute of Health, 28029 Madrid, Spain
- Division of Gastrointestinal and Liver Diseases, Department of Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, USA
| | - José C. Fernández-Checa
- Department of Cell Death and Proliferation, Institute of Biomedical Research of Barcelona (IIBB), Spanish National Research Council (CSIC), 08036 Barcelona, Spain; (S.T.); (P.S.)
- Liver Unit, Hospital Clinic I Provincial de Barcelona, Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), 08036 Barcelona, Spain
- Center for the Study of Liver and Gastrointestinal Diseases (CIBERehd), Carlos III National Institute of Health, 28029 Madrid, Spain
- Division of Gastrointestinal and Liver Diseases, Department of Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, USA
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Lacombe ML, Lamarche F, De Wever O, Padilla-Benavides T, Carlson A, Khan I, Huna A, Vacher S, Calmel C, Desbourdes C, Cottet-Rousselle C, Hininger-Favier I, Attia S, Nawrocki-Raby B, Raingeaud J, Machon C, Guitton J, Le Gall M, Clary G, Broussard C, Chafey P, Thérond P, Bernard D, Fontaine E, Tokarska-Schlattner M, Steeg P, Bièche I, Schlattner U, Boissan M. The mitochondrially-localized nucleoside diphosphate kinase D (NME4) is a novel metastasis suppressor. BMC Biol 2021; 19:228. [PMID: 34674701 PMCID: PMC8529772 DOI: 10.1186/s12915-021-01155-5] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Accepted: 09/17/2021] [Indexed: 12/11/2022] Open
Abstract
Background Mitochondrial nucleoside diphosphate kinase (NDPK-D, NME4, NM23-H4) is a multifunctional enzyme mainly localized in the intermembrane space, bound to the inner membrane. Results We constructed loss-of-function mutants of NDPK-D, lacking either NDP kinase activity or membrane interaction and expressed mutants or wild-type protein in cancer cells. In a complementary approach, we performed depletion of NDPK-D by RNA interference. Both loss-of-function mutations and NDPK-D depletion promoted epithelial-mesenchymal transition and increased migratory and invasive potential. Immunocompromised mice developed more metastases when injected with cells expressing mutant NDPK-D as compared to wild-type. This metastatic reprogramming is a consequence of mitochondrial alterations, including fragmentation and loss of mitochondria, a metabolic switch from respiration to glycolysis, increased ROS generation, and further metabolic changes in mitochondria, all of which can trigger pro-metastatic protein expression and signaling cascades. In human cancer, NME4 expression is negatively associated with markers of epithelial-mesenchymal transition and tumor aggressiveness and a good prognosis factor for beneficial clinical outcome. Conclusions These data demonstrate NME4 as a novel metastasis suppressor gene, the first localizing to mitochondria, pointing to a role of mitochondria in metastatic dissemination. Supplementary Information The online version contains supplementary material available at 10.1186/s12915-021-01155-5.
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Affiliation(s)
- Marie-Lise Lacombe
- Sorbonne Université, Inserm, Centre de Recherche Saint-Antoine, CRSA, Paris, France
| | - Frederic Lamarche
- Université Grenoble Alpes, INSERM U1055, Laboratory of Fundamental and Applied Bioenergetics (LBFA), and SFR Environmental and Systems Biology (BEeSy), Grenoble, France
| | - Olivier De Wever
- Laboratory of Experimental Cancer Research, Department of Human Structure and Repair, Cancer Research Institute Ghent (CRIG), Ghent University, Ghent, Belgium
| | | | - Alyssa Carlson
- Molecular Biology and Biochemistry Department, Wesleyan University, Middletown, USA
| | - Imran Khan
- Women's Malignancies Branch, Center for Cancer Research, National Cancer Institute, Bethesda, USA
| | - Anda Huna
- Cancer Research Center of Lyon, INSERM U1052, CNRS UMR 5286, Léon Bérard Center, Lyon University, Lyon, France
| | - Sophie Vacher
- Unit of Pharmacogenetics, Department of Genetics, Curie Institute, Paris, France
| | - Claire Calmel
- Sorbonne Université, Inserm, Centre de Recherche Saint-Antoine, CRSA, Paris, France
| | - Céline Desbourdes
- Université Grenoble Alpes, INSERM U1055, Laboratory of Fundamental and Applied Bioenergetics (LBFA), and SFR Environmental and Systems Biology (BEeSy), Grenoble, France
| | - Cécile Cottet-Rousselle
- Université Grenoble Alpes, INSERM U1055, Laboratory of Fundamental and Applied Bioenergetics (LBFA), and SFR Environmental and Systems Biology (BEeSy), Grenoble, France
| | - Isabelle Hininger-Favier
- Université Grenoble Alpes, INSERM U1055, Laboratory of Fundamental and Applied Bioenergetics (LBFA), and SFR Environmental and Systems Biology (BEeSy), Grenoble, France
| | - Stéphane Attia
- Université Grenoble Alpes, INSERM U1055, Laboratory of Fundamental and Applied Bioenergetics (LBFA), and SFR Environmental and Systems Biology (BEeSy), Grenoble, France
| | - Béatrice Nawrocki-Raby
- Reims Champagne Ardenne University, INSERM, P3Cell UMR-S 1250, SFR CAP-SANTE, Reims, France
| | - Joël Raingeaud
- INSERM U1279, Gustave Roussy Institute, Villejuif, France
| | - Christelle Machon
- Cancer Research Center of Lyon, INSERM U1052, CNRS UMR 5286, Léon Bérard Center, Lyon University, Lyon, France
| | - Jérôme Guitton
- Cancer Research Center of Lyon, INSERM U1052, CNRS UMR 5286, Léon Bérard Center, Lyon University, Lyon, France
| | - Morgane Le Gall
- Proteomics Platform 3P5, Paris University, Cochin Institute, INSERM, U1016, CNRS, UMR8104, Paris, France
| | - Guilhem Clary
- Proteomics Platform 3P5, Paris University, Cochin Institute, INSERM, U1016, CNRS, UMR8104, Paris, France
| | - Cedric Broussard
- Proteomics Platform 3P5, Paris University, Cochin Institute, INSERM, U1016, CNRS, UMR8104, Paris, France
| | - Philippe Chafey
- Proteomics Platform 3P5, Paris University, Cochin Institute, INSERM, U1016, CNRS, UMR8104, Paris, France
| | - Patrice Thérond
- AP-HP, CHU Bicêtre, Laboratory of Biochemistry, Le Kremlin-Bicêtre Hospital, Le Kremlin-Bicêtre, France.,EA7537, Paris Saclay University, Châtenay-Malabry, France
| | - David Bernard
- Cancer Research Center of Lyon, INSERM U1052, CNRS UMR 5286, Léon Bérard Center, Lyon University, Lyon, France
| | - Eric Fontaine
- Université Grenoble Alpes, INSERM U1055, Laboratory of Fundamental and Applied Bioenergetics (LBFA), and SFR Environmental and Systems Biology (BEeSy), Grenoble, France
| | - Malgorzata Tokarska-Schlattner
- Université Grenoble Alpes, INSERM U1055, Laboratory of Fundamental and Applied Bioenergetics (LBFA), and SFR Environmental and Systems Biology (BEeSy), Grenoble, France
| | - Patricia Steeg
- Women's Malignancies Branch, Center for Cancer Research, National Cancer Institute, Bethesda, USA
| | - Ivan Bièche
- Unit of Pharmacogenetics, Department of Genetics, Curie Institute, Paris, France
| | - Uwe Schlattner
- Université Grenoble Alpes, INSERM U1055, Laboratory of Fundamental and Applied Bioenergetics (LBFA), Institut Universitaire de France (IUF), Grenoble, France.
| | - Mathieu Boissan
- Sorbonne Université, Inserm, Centre de Recherche Saint-Antoine, CRSA, Paris, France. .,AP-HP, Laboratory of Biochemistry and Hormonology, Tenon Hospital, Paris, France.
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Shek D, Chen D, Read SA, Ahlenstiel G. Examining the gut-liver axis in liver cancer using organoid models. Cancer Lett 2021; 510:48-58. [PMID: 33891996 DOI: 10.1016/j.canlet.2021.04.008] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 03/29/2021] [Accepted: 04/13/2021] [Indexed: 12/23/2022]
Abstract
The World Health Organization predicts that by 2030 liver cancer will cause 1 million deaths annually, thus becoming the third most lethal cancer worldwide. Hepatocellular carcinoma and cholangiocarcinoma are the two major primary cancer subtypes involving the liver. Both are often diagnosed late, and hence response to treatment and survival are poor. It is therefore of utmost importance to understand the mechanisms by which liver cancers initiate and progress. The causes of primary liver cancer are diverse, resulting primarily from obesity, chronic alcohol abuse or viral hepatitis. Importantly, both alcohol and high fat diet can promote intestinal permeability, enabling microbial translocation from the gut into the liver. As a result, these microbial antigens and metabolites exacerbate hepatic inflammation and fibrosis, increasing the risk of primary liver cancer. Organoids are primary, three-dimensional, stem cell derived liver models that can recapitulate many of the disease phenotypes observed in vivo. This review aims to summarize the advantages of organoid culture to examine the gut-liver axis with respect to cancer initiation and progression. In particular, the use of gut and liver organoid mono- and co-cultures together and with immune cell populations to best recapitulate disease mechanisms and develop therapeutic interventions.
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Affiliation(s)
- Dmitrii Shek
- Blacktown Clinical School, Western Sydney University, Blacktown, NSW, Australia; Storr Liver Centre, The Westmead Institute for Medical Research, University of Sydney, Westmead, NSW, Australia; Blacktown Hospital, Blacktown, NSW, Australia
| | - Dishen Chen
- Storr Liver Centre, The Westmead Institute for Medical Research, University of Sydney, Westmead, NSW, Australia
| | - Scott A Read
- Blacktown Clinical School, Western Sydney University, Blacktown, NSW, Australia; Storr Liver Centre, The Westmead Institute for Medical Research, University of Sydney, Westmead, NSW, Australia; Blacktown Hospital, Blacktown, NSW, Australia.
| | - Golo Ahlenstiel
- Blacktown Clinical School, Western Sydney University, Blacktown, NSW, Australia; Storr Liver Centre, The Westmead Institute for Medical Research, University of Sydney, Westmead, NSW, Australia; Blacktown Hospital, Blacktown, NSW, Australia.
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