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Hu Z, Linn N, Li Q, Zhang K, Liao J, Han Q, Zhang H, Guo J, Hu L, Pan J, Li Y, Tang Z. MitomiR-504 alleviates the copper-induced mitochondria-mediated apoptosis by suppressing Bak1 expression in porcine jejunal epithelial cells. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 858:160157. [PMID: 36379340 DOI: 10.1016/j.scitotenv.2022.160157] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Revised: 10/31/2022] [Accepted: 11/09/2022] [Indexed: 06/16/2023]
Abstract
Copper (Cu), an environmental heavy metal pollutant, has been widely researched in its toxicology. Recently, an increasing number of mitochondrial microRNAs (mitomiRs) have been shown to involve in the metabolic regulation. However, the underlying mechanisms of mitomiRs on regulating apoptosis under Cu exposure are still unclear. Here, we proved that Cu induced mitochondria-mediated apoptosis in porcine jejunal epithelial cells, concomitant with distinct reduction of mitomiR-504 in vivo and in vitro. The miR-504 mimic notably enhanced the mRNA and protein expressions of Bak1, Bax, Cleaved-caspase3 and Caspase-9, and significantly decreased the apoptosis rate and Bcl-2 mRNA and protein levels, indicating that overexpression of mitomiR-504 attenuated the Cu-induced mitochondria-mediated apoptosis. Besides, Bak1 was confirmed as a direct target of mitomiR-504 by the bioinformatics analysis and dual-luciferase reporter assay. Subsequently, transfection of siRNA targeting Bak1 significantly enhanced the alleviating effect of miR-504 mimic on the Cu-induced mitochondria-mediated apoptosis. Overall, these suggested that overexpression of mitomiR-504 alleviated the Cu-induced mitochondria-mediated apoptosis in jejunal epithelial cells by suppressing Bak1 expression. These findings are conducive to elucidating the mechanism of Cu-induced jejunal epithelial pathologies, providing a new research idea for the Cu toxicology.
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Affiliation(s)
- Zhuoying Hu
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, Guangdong, PR China
| | - Nandar Linn
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, Guangdong, PR China
| | - Quanwei Li
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, Guangdong, PR China
| | - Kai Zhang
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, Guangdong, PR China
| | - Jianzhao Liao
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, Guangdong, PR China
| | - Qingyue Han
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, Guangdong, PR China
| | - Hui Zhang
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, Guangdong, PR China
| | - Jianying Guo
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, Guangdong, PR China
| | - Lianmei Hu
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, Guangdong, PR China
| | - Jiaqiang Pan
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, Guangdong, PR China
| | - Ying Li
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, Guangdong, PR China
| | - Zhaoxin Tang
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, Guangdong, PR China.
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Ortega MA, Fraile-Martínez O, Guijarro LG, Casanova C, Coca S, Álvarez-Mon M, Buján J, García-Honduvilla N, Asúnsolo Á. The Regulatory Role of Mitochondrial MicroRNAs (MitomiRs) in Breast Cancer: Translational Implications Present and Future. Cancers (Basel) 2020; 12:cancers12092443. [PMID: 32872155 PMCID: PMC7564393 DOI: 10.3390/cancers12092443] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Revised: 08/25/2020] [Accepted: 08/26/2020] [Indexed: 02/07/2023] Open
Abstract
Simple Summary Mitochondrial microRNAs (mitomiRs) are an emerging field of study in a wide range of tumours including breast cancer. By targeting mitochondrial, or non-mitochondrial products, mitomiRs are able to regulate the functions of this organelle, thus controlling multiple carcinogenic processes. The knowledge of this system may provide a novel approach for targeted therapies, as potential biomarkers or helping in the diagnosis of such a complex malignancy. Abstract Breast cancer is the most prevalent and incident female neoplasm worldwide. Although survival rates have considerably improved, it is still the leading cause of cancer-related mortality in women. MicroRNAs are small non-coding RNA molecules that regulate the posttranscriptional expression of a wide variety of genes. Although it is usually located in the cytoplasm, several studies have detected a regulatory role of microRNAs in other cell compartments such as the nucleus or mitochondrion, known as “mitomiRs”. MitomiRs are essential modulators of mitochondrion tasks and their abnormal expression has been linked to the aetiology of several human diseases related to mitochondrial dysfunction, including breast cancer. This review aims to examine basic knowledge of the role of mitomiRs in breast cancer and discusses their prospects as biomarkers or therapeutic targets.
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Affiliation(s)
- Miguel A. Ortega
- Department of Medicine and Medical Specialities, Unit of Histology and Pathology, Faculty of Medicine and Health Sciences, University of Alcalá, 28801 Alcalá de Henares, Spain; (O.F.-M.); (C.C.); (S.C.); (M.Á.-M.); (J.B.); (N.G.-H.)
- Ramón y Cajal Institute of Sanitary Research (IRYCIS), 28034 Madrid, Spain;
- Cancer Registry and Pathology Department, Hospital Universitario Principe de Asturias, 28806 Alcalá de Henares, Madrid, Spain
- Correspondence: ; Tel.: +34-91-885-4540; Fax: +34-91-885-4885
| | - Oscar Fraile-Martínez
- Department of Medicine and Medical Specialities, Unit of Histology and Pathology, Faculty of Medicine and Health Sciences, University of Alcalá, 28801 Alcalá de Henares, Spain; (O.F.-M.); (C.C.); (S.C.); (M.Á.-M.); (J.B.); (N.G.-H.)
| | - Luis G. Guijarro
- Department of System Biology, Unit of Biochemistry and Molecular Biology (CIBEREHD), University of Alcalá, 28801 Alcalá de Henares, Spain;
| | - Carlos Casanova
- Department of Medicine and Medical Specialities, Unit of Histology and Pathology, Faculty of Medicine and Health Sciences, University of Alcalá, 28801 Alcalá de Henares, Spain; (O.F.-M.); (C.C.); (S.C.); (M.Á.-M.); (J.B.); (N.G.-H.)
| | - Santiago Coca
- Department of Medicine and Medical Specialities, Unit of Histology and Pathology, Faculty of Medicine and Health Sciences, University of Alcalá, 28801 Alcalá de Henares, Spain; (O.F.-M.); (C.C.); (S.C.); (M.Á.-M.); (J.B.); (N.G.-H.)
- Ramón y Cajal Institute of Sanitary Research (IRYCIS), 28034 Madrid, Spain;
| | - Melchor Álvarez-Mon
- Department of Medicine and Medical Specialities, Unit of Histology and Pathology, Faculty of Medicine and Health Sciences, University of Alcalá, 28801 Alcalá de Henares, Spain; (O.F.-M.); (C.C.); (S.C.); (M.Á.-M.); (J.B.); (N.G.-H.)
- Ramón y Cajal Institute of Sanitary Research (IRYCIS), 28034 Madrid, Spain;
- Immune System Diseases-Rheumatology, Oncology Service an Internal Medicine, University Hospital Príncipe de Asturias, (CIBEREHD), 28806 Alcalá de Henares, Madrid, Spain
| | - Julia Buján
- Department of Medicine and Medical Specialities, Unit of Histology and Pathology, Faculty of Medicine and Health Sciences, University of Alcalá, 28801 Alcalá de Henares, Spain; (O.F.-M.); (C.C.); (S.C.); (M.Á.-M.); (J.B.); (N.G.-H.)
- Ramón y Cajal Institute of Sanitary Research (IRYCIS), 28034 Madrid, Spain;
| | - Natalio García-Honduvilla
- Department of Medicine and Medical Specialities, Unit of Histology and Pathology, Faculty of Medicine and Health Sciences, University of Alcalá, 28801 Alcalá de Henares, Spain; (O.F.-M.); (C.C.); (S.C.); (M.Á.-M.); (J.B.); (N.G.-H.)
- Ramón y Cajal Institute of Sanitary Research (IRYCIS), 28034 Madrid, Spain;
| | - Ángel Asúnsolo
- Ramón y Cajal Institute of Sanitary Research (IRYCIS), 28034 Madrid, Spain;
- Department of Surgery, Medical and Social Sciences, Faculty of Medicine and Health Sciences, University of Alcalá, 28801 Alcala de Henares, Madrid, Spain
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Léger JL, Jougleux JL, Savadogo F, Pichaud N, Boudreau LH. Rapid isolation and purification of functional platelet mitochondria using a discontinuous Percoll gradient. Platelets 2019; 31:258-264. [PMID: 31057000 DOI: 10.1080/09537104.2019.1609666] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The isolation of mitochondria is gaining importance in experimental and clinical laboratory settings. The mitochondrion is known as the powerhouse of the cell as it produces the energy to power most cellular functions but is also involved in many cellular processes. Of interest, mitochondria and mitochondrial components (i.e. circular DNA, N-formylated peptides, cardiolipin) have been involved in several human inflammatory pathologies, such as cancer, Alzheimer's disease, Parkinson's disease, and rheumatoid arthritis. Therefore, stringent methods of isolation and purification of mitochondria are of the utmost importance in assessing mitochondrial-related diseases. While several mitochondrial isolation methods have been previously published, these techniques are aimed at yielding mitochondria from cells types other than platelets. In addition, little information is known on the number of platelet-derived microparticles that can contaminate the mitochondrial preparation or even the overall quality and integrity of the mitochondria. In this project, we provide an alternate purification method yielding mitochondria of high purity and integrity from human platelets. Using human platelets, flow cytometry and transmission electron microscopy experiments were performed to demonstrate that the Percoll gradient method yielded significantly purified mitochondria by removing platelet membrane debris. Mitochondrial respiration following the substrate-uncoupler-inhibitor-titration (SUIT) protocol was similar in both the purified and crude mitochondrial extraction methods. Finally, the cytochrome c effect and JC-1 staining did not exhibit a significant difference between the two methods, suggesting that the mitochondrial integrity was not affected. Our study suggests that the Percoll discontinuous gradient purifies viable platelet-derived mitochondria by removing platelet-derived debris, including microparticles, therefore confirming that this isolation method is ideal for studying the downstream effects of intact mitochondria in mitochondrial-related diseases.
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Affiliation(s)
- Jacob L Léger
- Department of Chemistry and Biochemistry, Université de Moncton, Moncton, Canada
| | - Jean-Luc Jougleux
- Department of Chemistry and Biochemistry, Université de Moncton, Moncton, Canada
| | - Fanta Savadogo
- Department of Chemistry and Biochemistry, Université de Moncton, Moncton, Canada
| | - Nicolas Pichaud
- Department of Chemistry and Biochemistry, Université de Moncton, Moncton, Canada
| | - Luc H Boudreau
- Department of Chemistry and Biochemistry, Université de Moncton, Moncton, Canada
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Dai X, Xing C, Cao H, Luo J, Wang T, Liu P, Guo X, Hu G, Zhang C. Alterations of mitochondrial antioxidant indexes and apoptosis in duck livers caused by Molybdenum or/and cadmium. CHEMOSPHERE 2018; 193:574-580. [PMID: 29169133 DOI: 10.1016/j.chemosphere.2017.11.063] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2017] [Revised: 11/10/2017] [Accepted: 11/14/2017] [Indexed: 06/07/2023]
Abstract
Cadmium (Cd) and high Molybdenum (Mo) can lead to adverse reactions on animals, but the co-induced toxicity of Mo and Cd to liver in ducks was not well understood. To investigate the co-induced toxic effects of Mo combined with Cd on mitochondrial oxidative stress and apoptosis in duck livers. 240 healthy 11-day-old ducks were randomly divided into 6 groups (control, LMo group, HMo group, Cd group, LMoCd group and HMoCd group). After being treated for 30, 60, 90 and 120 days, liver mitochondrial antioxidant indexes, ceruloplasmin (CP), metallothionein (MT), Bak-1 and Caspase-3 genes mRNA expression levels, and ultrastructural changes were evaluated. The results showed that total antioxidative capacity (T-AOC), catalase (CAT), superoxide dismutase (SOD) and xanthine oxidase (XOD) activities in experimental groups were decreased, whereas malondialdehyde (MDA) content and nitric oxide synthase (NOS) activity were increased compared with control group, and these changes of co-treated groups were more obvious in the later period of the experiment. The mRNA expression levels of CP, Bak-1 and Caspase-3 were up-regulated in experimental groups compared with control group and showed significant difference between co-treated groups and single treated groups. The mRNA expression level of MT in Cd group was higher than that in co-treated groups. Additionally, ultrastructural changes showed karyopyknosis, mitochondrial swelling, vacuolation and disruption of mitochondrial cristae in co-treated groups. Taken together, it was suggested that dietary Mo and Cd might lead to mitochondrial oxidative stress and apoptosis in duck livers, and it showed a possible synergistic relationship between the two elements.
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Affiliation(s)
- Xueyan Dai
- Jiangxi Provincial Key Laboratory for Animal Health, Institute of Animal Population Health, College of Animal Science and Technology, Jiangxi Agricultural University, No. 1101 Zhimin Avenue, Economic and Technological Development District, Nanchang 330045, Jiangxi, PR China
| | - Chenghong Xing
- Jiangxi Provincial Key Laboratory for Animal Health, Institute of Animal Population Health, College of Animal Science and Technology, Jiangxi Agricultural University, No. 1101 Zhimin Avenue, Economic and Technological Development District, Nanchang 330045, Jiangxi, PR China
| | - Huabin Cao
- Jiangxi Provincial Key Laboratory for Animal Health, Institute of Animal Population Health, College of Animal Science and Technology, Jiangxi Agricultural University, No. 1101 Zhimin Avenue, Economic and Technological Development District, Nanchang 330045, Jiangxi, PR China
| | - Junrong Luo
- Jiangxi Provincial Key Laboratory for Animal Health, Institute of Animal Population Health, College of Animal Science and Technology, Jiangxi Agricultural University, No. 1101 Zhimin Avenue, Economic and Technological Development District, Nanchang 330045, Jiangxi, PR China
| | - Tiancheng Wang
- Jiangxi Provincial Key Laboratory for Animal Health, Institute of Animal Population Health, College of Animal Science and Technology, Jiangxi Agricultural University, No. 1101 Zhimin Avenue, Economic and Technological Development District, Nanchang 330045, Jiangxi, PR China
| | - Ping Liu
- Jiangxi Provincial Key Laboratory for Animal Health, Institute of Animal Population Health, College of Animal Science and Technology, Jiangxi Agricultural University, No. 1101 Zhimin Avenue, Economic and Technological Development District, Nanchang 330045, Jiangxi, PR China
| | - Xiaoquan Guo
- Jiangxi Provincial Key Laboratory for Animal Health, Institute of Animal Population Health, College of Animal Science and Technology, Jiangxi Agricultural University, No. 1101 Zhimin Avenue, Economic and Technological Development District, Nanchang 330045, Jiangxi, PR China
| | - Guoliang Hu
- Jiangxi Provincial Key Laboratory for Animal Health, Institute of Animal Population Health, College of Animal Science and Technology, Jiangxi Agricultural University, No. 1101 Zhimin Avenue, Economic and Technological Development District, Nanchang 330045, Jiangxi, PR China.
| | - Caiying Zhang
- Jiangxi Provincial Key Laboratory for Animal Health, Institute of Animal Population Health, College of Animal Science and Technology, Jiangxi Agricultural University, No. 1101 Zhimin Avenue, Economic and Technological Development District, Nanchang 330045, Jiangxi, PR China.
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5
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Wang M, Zhou Z, Wang J, Zhang X. An improved in vitro method for screening toxin and medicine targeting CYP2E1. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2016; 47:86-91. [PMID: 27653210 DOI: 10.1016/j.etap.2016.09.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2016] [Revised: 09/10/2016] [Accepted: 09/13/2016] [Indexed: 06/06/2023]
Abstract
The cytochrome P450 enzyme 2E1 (CYP2E1) presents in both microsome and mitochondrion, which influences the metabolism of many xenobiotics. The mice active liver homogenate was prepared for the medicinal incubation and mitochondrion was extracted for chemical screening targeting CYP2E1 enzyme. Representative CYP2E1 inducers (ethanol and pyrazole) and inhibitors (diallyldisulfide and kaempferol) were applied to evaluate the effectiveness of homogenate-mitochondrial system. In parallel, the in-vitro microsomal method targeting CYP2E1 was also operated for comparison. The results showed that in homogenate-mitochondrial method, the protein level and activity of CYP2E1 were increased by ethanol and pyrazole; reduced by diallyldisulfide and kaempferol, and this homogenate-mitochondrial method is convenient with good repeatability and reproducibility in screening chemicals targeting CYP2E1, especially for the inducers. Thus, the homogenate-mitochondrial method might be effective in screening both CYP2E1 inhibitor and inducer.
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Affiliation(s)
- Meng Wang
- Chinese-German Joint Laboratory for Natural Product Research, Qinling-Bashan Mountains Bioresources Comprehensive Development C.I.C., College of Biological Science and Engineering, Shaanxi Sci-tech University, Hanzhong, Shaanxi 723000, China; College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Zhaoxiang Zhou
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Jian Wang
- Chinese-German Joint Laboratory for Natural Product Research, Qinling-Bashan Mountains Bioresources Comprehensive Development C.I.C., College of Biological Science and Engineering, Shaanxi Sci-tech University, Hanzhong, Shaanxi 723000, China
| | - Xiaoying Zhang
- Chinese-German Joint Laboratory for Natural Product Research, Qinling-Bashan Mountains Bioresources Comprehensive Development C.I.C., College of Biological Science and Engineering, Shaanxi Sci-tech University, Hanzhong, Shaanxi 723000, China; College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi 712100, China.
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Borralho PM, Rodrigues CMP, Steer CJ. microRNAs in Mitochondria: An Unexplored Niche. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2015; 887:31-51. [PMID: 26662985 DOI: 10.1007/978-3-319-22380-3_3] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Mitochondria are pivotal organelles involved in the regulation of a myriad of crucial biological processes, including cell survival and cell death, rendering mitochondrial dysfunction a relevant step in numerous pathophysiological processes. MicroRNAs (miRNAs) are endogenous small noncoding RNAs that add a new layer of complexity to the control of gene expression. miRNAs function as master regulators and fine-tuners of gene expression, primarily via posttranscriptional mechanisms, and are increasingly demonstrated as a paramount class of endogenous molecules with relevant diagnostic, prognostic, and therapeutic applications. miRNAs and other RNA interference have recently been reported to be present in mitochondria from several species, and we are now beginning to unveil mitochondrial miRNA transport mechanisms, biological function and targets to ascertain their role in this unexplored niche. Here, we describe miRNA biogenesis and present key findings regarding miRNA localization to mitochondria, origin, putative biological function, and implications for human disease.
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Affiliation(s)
- Pedro M Borralho
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Lisbon, Portugal
| | - Cecília M P Rodrigues
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Lisbon, Portugal
| | - Clifford J Steer
- Departments of Medicine, and Genetics, Cell Biology and Development, University of Minnesota Medical School, VFW Cancer Research Center, 406 Harvard Street S.E., Minneapolis, MN, 55455, USA.
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