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Farrell CE, Liu X, Yagan NO, Suda AC, Cerqueira DM, Bodnar AJ, Kashlan OB, Subramanya AR, Ho J, Butterworth MB. MicroRNA-19 is regulated by aldosterone in a sex-specific manner to alter kidney sodium transport. Am J Physiol Cell Physiol 2024; 326:C282-C293. [PMID: 38047299 PMCID: PMC11192485 DOI: 10.1152/ajpcell.00385.2023] [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: 08/15/2023] [Revised: 11/14/2023] [Accepted: 11/15/2023] [Indexed: 12/05/2023]
Abstract
A key regulator of blood pressure homeostasis is the steroid hormone aldosterone, which is released as the final signaling hormone of the renin-angiotensin-aldosterone-signaling (RAAS) system. Aldosterone increases sodium (Na+) reabsorption in the kidney distal nephron to regulate blood volume. Unregulated RAAS signaling can lead to hypertension and cardiovascular disease. The serum and glucocorticoid kinase (SGK1) coordinates much of the Na+ reabsorption in the cortical collecting duct (CCD) tubular epithelial cells. We previously demonstrated that aldosterone alters the expression of microRNAs (miRs) in CCD principal cells. The aldosterone-regulated miRs can modulate Na+ transport and the cellular response to aldosterone signaling. However, the sex-specific regulation of miRs by aldosterone in the kidney distal nephron has not been explored. In this study, we report that miR-19, part of the miR-17-92 cluster, is upregulated in female mouse CCD cells in response to aldosterone activation. Mir-19 binding to the 3'-untranslated region of SGK1 was confirmed using a dual-luciferase reporter assay. Increasing miR-19 expression in CCD cells decreased SGK1 message and protein expression. Removal of this cluster using a nephron-specific, inducible knockout mouse model increased SGK1 expression in female mouse CCD cells. The miR-19-induced decrease in SGK1 protein expression reduced the response to aldosterone stimulation and may account for sex-specific differences in aldosterone signaling. By examining evolution of the miR-17-92 cluster, phylogenetic sequence analysis indicated that this cluster arose at the same time that other Na+-sparing and salt regulatory proteins, specifically SGK1, first emerged, indicating a conserved role for these miRs in kidney function of salt and water homeostasis.NEW & NOTEWORTHY Expression of the microRNA-17-92 cluster is upregulated by aldosterone in mouse cortical collecting duct principal cells, exclusively in female mice. MiR-19 in this cluster targets the serum and glucocorticoid kinase (SGK1) to downregulate both mRNA and protein expression, resulting in a decrease in sodium transport across epithelial cells of the collecting duct. The miR-17-92 cluster is evolutionarily conserved and may act as a novel feedback regulator for aldosterone signaling in females.
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Affiliation(s)
- Corinne E Farrell
- Department of Cell Biology, University of Pittsburgh, Pittsburgh, Pennsylvania, United States
| | - Xiaoning Liu
- Department of Cell Biology, University of Pittsburgh, Pittsburgh, Pennsylvania, United States
| | - Nejla Ozbaki Yagan
- Department of Cell Biology, University of Pittsburgh, Pittsburgh, Pennsylvania, United States
| | - Amanda C Suda
- Department of Cell Biology, University of Pittsburgh, Pittsburgh, Pennsylvania, United States
| | - Debora M Cerqueira
- Division of Nephrology, Department of Pediatrics, University of Pittsburgh, Pittsburgh, Pennsylvania, United States
| | - Andrew J Bodnar
- Division of Nephrology, Department of Pediatrics, University of Pittsburgh, Pittsburgh, Pennsylvania, United States
| | - Ossama B Kashlan
- Renal-Electrolyte Division, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, United States
| | - Arohan R Subramanya
- Renal-Electrolyte Division, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, United States
| | - Jacqueline Ho
- Division of Nephrology, Department of Pediatrics, University of Pittsburgh, Pittsburgh, Pennsylvania, United States
| | - Michael B Butterworth
- Department of Cell Biology, University of Pittsburgh, Pittsburgh, Pennsylvania, United States
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Park S, Kim M, Park M, Jin Y, Lee SJ, Lee H. Specific upregulation of extracellular miR-6238 in particulate matter-induced acute lung injury and its immunomodulation. JOURNAL OF HAZARDOUS MATERIALS 2023; 445:130466. [PMID: 36455323 DOI: 10.1016/j.jhazmat.2022.130466] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Revised: 11/03/2022] [Accepted: 11/22/2022] [Indexed: 06/17/2023]
Abstract
Acute lung injury (ALI) and acute respiratory distress syndrome (ARDS) are life-threatening diseases characterized by a severe inflammatory response and the destruction of alveolar epithelium and endothelium. ALI/ARDS is caused by pathogens and toxic environmental stimuli, such as particulate matter (PM). However, the general symptoms of ALI/ARDS are similar, and determining the cause of lung injury is often challenging. In this study, we investigated whether there is a critical miRNA that characterizes PM-induced ALI. We found that the expression of miR-6238 is specifically upregulated in lung tissue and lung-derived extracellular vesicles (EVs) in response to PM exposure. Notably, bacterial endotoxin (Lipopolysaccharide; LPS or peptidoglycan; PTG) does not induce the expression of miR-6238 in the lung. Instead, the expression of miR-155 is dramatically increased in LPS-induced ALI. We further demonstrated that human lung epithelial cells and macrophages predominantly produce miR-6238 and miR-155, respectively. Mechanistically, EV-miR-6238 is effectively internalized into alveolar macrophages (AMs) and regulates inflammatory responses in vivo. CXCL3 is a main target of miR-6238 in AMs and modulates neutrophil infiltration into the lung alveoli. Collectively, our findings suggest that miR-6238 is a novel regulator of pulmonary inflammation and a putative biomarker that distinguishes PM-induced ALI from endotoxin (LPS/PTG)-mediated ALI.
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Affiliation(s)
- Sujeong Park
- Department of Biology and Chemistry, Changwon National University, Changwon 51140, South Korea
| | - Miji Kim
- Department of Biology and Chemistry, Changwon National University, Changwon 51140, South Korea
| | - Minkyung Park
- Department of Functional Genomics, University of Science and Technology (UST), Daejeon 34113, South Korea; Environmental Disease Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon 34141, South Korea
| | - Yang Jin
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Boston University School of Medicine, Boston, MA 02118, USA
| | - Seon-Jin Lee
- Department of Functional Genomics, University of Science and Technology (UST), Daejeon 34113, South Korea; Environmental Disease Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon 34141, South Korea.
| | - Heedoo Lee
- Department of Biology and Chemistry, Changwon National University, Changwon 51140, South Korea.
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3
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Tan X, Zhu T, Zhang L, Fu L, Hu Y, Li H, Li C, Zhang J, Liang B, Liu J. miR-669a-5p promotes adipogenic differentiation and induces browning in preadipocytes. Adipocyte 2022; 11:120-132. [PMID: 35094659 PMCID: PMC8803067 DOI: 10.1080/21623945.2022.2030570] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Revised: 12/12/2021] [Accepted: 01/13/2022] [Indexed: 02/07/2023] Open
Abstract
Obesity is a major global health issue that contributes to the occurrence of metabolic disorders. Based on this fact, understanding the underlying mechanisms and to uncover promising therapeutic approaches for obesity have attracted intense investigation. Brown adipose tissue (BAT) can help burns excess calories. Therefore, promoting White adipose tissue (WAT) browning and BAT activation is an attractive strategy for obesity treatment. MicroRNAs (miRNAs) are small, non-coding RNAs, which are involved in regulation of adipogenic processes and metabolic functions. Evidence is accumulating that miRNAs are important regulators for both brown adipocyte differentiation and white adipocyte browning. Here we report that the expression of miR-669a-5p increases during the adipogenic differentiation of 3T3-L1 and C3H10T1/2 adipocytes. miR-669a-5p supplementation promotes adipogenic differentiation and causes browning of 3T3-L1 and C3H10T1/2 cells. Moreover, the expression of miR-669a-5p is upregulated in iWAT of mice exposed to cold. These data demonstrate that miR-669a-5p plays a role in regulating adipocyte differentiation and fat browning.Abbreviations: Acadl: long-chain acyl-Coenzyme A dehydrogenase; Acadm: medium-chain acyl-Coenzyme A dehydrogenase; Acadvl: very long-chain acyl-Coenzyme A dehydrogenase, very long chain; Aco2: mitochondrial aconitase 2; BAT: brown adipose tissue; Bmper: BMP-binding endothelial regulator; Cpt1-b:carnitine palmitoyltransferase 1b; Cpt2: carnitine palmitoyltransferase 2; Crat: carnitine acetyltransferase; Cs: citrate synthase; C2MC: Chromosome 2 miRNA cluster; DMEM: Dulbecco's modified Eagle medium; eWAT: epididymal white adipose tissue; ETC: electron transport chain; FAO: fatty acid oxidation; Fabp4:fatty acid binding protein 4; FBS: fetal bovine serum; Hadha: hydroxyacyl-CoA dehydrogenase trifunctional multienzyme complex subunit alpha; Hadhb: hydroxyacyl-CoA dehydrogenase trifunctional multienzyme complex subunit beta; HFD: high fat diet; Idh3a: isocitrate dehydrogenase 3 alpha; iWAT: inguinal subcutaneous white adipose tissue; Lpl: lipoprotein lipase; Mdh2: malate dehydrogenase 2; NBCS: NewBorn Calf Serum; mt-Nd1: mitochondrial NADH dehydrogenase 1; Ndufb8:ubiquinone oxidoreductase subunit B8; Nrf1: nuclear respiratory factor 1; Pgc1α: peroxisome proliferative activated receptor gamma coactivator 1 alpha; Pgc1b: peroxisome proliferative activated receptor, gamma, coactivator 1 beta; Pparγ: peroxisome proliferator activated receptor gamma; Prdm16: PR domain containing 16; Rgs4: regulator of G-protein signaling 4; Sdhb: succinate dehydrogenase complex, subunit B; Sdhc: succinate dehydrogenase complex, subunit C; Sdhd: succinate dehydrogenase complex, subunit D; Sh3d21: SH3 domain containing 21; Sfmbt2: Scm-like with four mbt domains 2; TG: triglyceride; TCA: tricarboxylic acid cycle; Tfam: transcription factor A, mitochondrial; TMRE: tetramethylrhodamine, methyl ester; Ucp1: uncoupling protein 1; Uqcrc2: ubiquinol cytochrome c reductase core protein 2; WAT: White adipose tissue.
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Affiliation(s)
- Xiaoqiong Tan
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences & Yunnan Province, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, China
- Kunming College of Life Science, University of Chinese Academy of Sciences, Kunming, China
- Department of Respiratory and Critical Care Medicine, The First People’s Hospital of Yunnan Province, Kunming, China
- Department of Respiratory and Critical Care Medicine, The Affiliated Hospital of Kunming University of Science and Technology, Kunming, China
| | - Tingting Zhu
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences & Yunnan Province, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, China
- Kunming College of Life Science, University of Chinese Academy of Sciences, Kunming, China
| | - Linqiang Zhang
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences & Yunnan Province, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, China
- Kunming College of Life Science, University of Chinese Academy of Sciences, Kunming, China
| | - Lin Fu
- Center for Life Sciences, School of Life Sciences, Yunnan University, Kunming, China
| | - Ying Hu
- School of Traditional Chinese Medicine, Yunnan University of Chinese Medicine, Kunming, China
| | - Huiqin Li
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences & Yunnan Province, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, China
- Kunming College of Life Science, University of Chinese Academy of Sciences, Kunming, China
| | - Chengbin Li
- Center for Life Sciences, School of Life Sciences, Yunnan University, Kunming, China
| | - Jingjing Zhang
- Center for Life Sciences, School of Life Sciences, Yunnan University, Kunming, China
| | - Bin Liang
- Center for Life Sciences, School of Life Sciences, Yunnan University, Kunming, China
| | - Jing Liu
- Center for Life Sciences, School of Life Sciences, Yunnan University, Kunming, China
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Kujawa M, O’Meara M, Li H, Xu L, Meda Venkata SP, Nguyen H, Minjares M, Zhang K, Wang JM. MicroRNA-466 and microRNA-200 increase endothelial permeability in hyperglycemia by targeting Claudin-5. MOLECULAR THERAPY. NUCLEIC ACIDS 2022; 29:259-271. [PMID: 35892090 PMCID: PMC9307898 DOI: 10.1016/j.omtn.2022.07.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Accepted: 07/04/2022] [Indexed: 01/05/2023]
Abstract
Endothelial cell (EC) permeability is essential to vascular homeostasis in diabetes. MicroRNAs are critical gene regulators whose roles in the EC permeability have yet to be characterized. This study aims to examine the change in cell permeability induced by miR-200 and miR-466 in ECs. Human aortic ECs and dermal microvascular ECs from healthy subjects and type 2 diabetic patients were used. Our in vitro experiments unveiled higher expressions of miR-200 family members and miR-466 in diabetic ECs and in healthy ECs when exposed to high glucose. Overexpression of both miR-200 and miR-466 significantly increased EC permeability through transcriptional suppression of Claudin-5, the cell tight junction protein, by directly binding to its 3' untranslated region. In a mouse model of chronic hyperglycemia mimicking type 2 diabetes in humans (db/db mice), the delayed closure rate of a full-thickness excisional wound was partly rescued by topical application of the miR-200 inhibitor. The topical application of both miR-200 and miR-466 inhibitors exhibited improved efficacy in accelerating wound closure compared with the topical application of miR-200 inhibitor alone. Our study demonstrated the potentially effective approach of miR-200/miR-466 cocktail inhibition to restore vascular integrity and tissue repair in hyperglycemia.
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Affiliation(s)
- Marisa Kujawa
- Department of Pharmaceutical Sciences, Eugene Applebaum College of Pharmacy and Health Sciences, Wayne State University, Detroit, MI, USA
| | - Megan O’Meara
- Department of Pharmaceutical Sciences, Eugene Applebaum College of Pharmacy and Health Sciences, Wayne State University, Detroit, MI, USA
| | - Hainan Li
- Department of Pharmaceutical Sciences, Eugene Applebaum College of Pharmacy and Health Sciences, Wayne State University, Detroit, MI, USA
| | - Liping Xu
- Department of Pharmaceutical Sciences, Eugene Applebaum College of Pharmacy and Health Sciences, Wayne State University, Detroit, MI, USA
| | - Sai Pranathi Meda Venkata
- Department of Pharmaceutical Sciences, Eugene Applebaum College of Pharmacy and Health Sciences, Wayne State University, Detroit, MI, USA
| | - Huong Nguyen
- Department of Pharmaceutical Sciences, Eugene Applebaum College of Pharmacy and Health Sciences, Wayne State University, Detroit, MI, USA
| | - Morgan Minjares
- Department of Pharmaceutical Sciences, Eugene Applebaum College of Pharmacy and Health Sciences, Wayne State University, Detroit, MI, USA
| | - Kezhong Zhang
- Centers for Molecular Medicine and Genetics, School of Medicine, Wayne State University, Detroit, MI, USA
| | - Jie-Mei Wang
- Department of Pharmaceutical Sciences, Eugene Applebaum College of Pharmacy and Health Sciences, Wayne State University, Detroit, MI, USA
- Centers for Molecular Medicine and Genetics, School of Medicine, Wayne State University, Detroit, MI, USA
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5
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Bone marrow mesenchymal stem cell-derived exosomal microRNA-381-3p alleviates vascular calcification in chronic kidney disease by targeting NFAT5. Cell Death Dis 2022; 13:278. [PMID: 35351860 PMCID: PMC8964813 DOI: 10.1038/s41419-022-04703-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2021] [Revised: 02/13/2022] [Accepted: 03/03/2022] [Indexed: 01/08/2023]
Abstract
Vascular calcification (VC) is a significant complication of chronic kidney disease (CKD) and cellular apoptosis is one of the intricate mechanisms of VC. Bone marrow mesenchymal stem cell-derived exosome (BMSC-Exo) alleviates VC, but the mechanism remains unclear. We investigated the mechanism of BMSC-Exo using high phosphate stimulated Human aortic smooth muscle cells (HA-VSMCs) and 5/6 subtotal nephrectomy (SNx) rat models. We demonstrated that the effect of BMSC-Exo on the inhibition of cellular apoptosis and calcification partially depended on exosomal microRNA-381-3p (miR-381-3p) both in vivo and in vitro, and confirmed that miR-381-3p could inhibit Nuclear Factor of Activated T cells 5 (NFAT5) expression by directly binding to its 3′ untranslated region. Additionally, we found that severe calcification of arteries in dialysis patients was associated with decreased miR-381-3p and increased NFAT5 expression levels. Collectively, our findings proved that BMSC-Exo plays anti-calcification and anti-apoptosis roles in CKD by delivering enclosed miR-381-3p, which directly targets NFAT5 mRNA, and leads to a better understanding of the mechanism of CKD-VC. ![]()
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6
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NFAT5-Mediated Signalling Pathways in Viral Infection and Cardiovascular Dysfunction. Int J Mol Sci 2021; 22:ijms22094872. [PMID: 34064510 PMCID: PMC8124654 DOI: 10.3390/ijms22094872] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2021] [Revised: 04/30/2021] [Accepted: 05/02/2021] [Indexed: 02/06/2023] Open
Abstract
The nuclear factor of activated T cells 5 (NFAT5) is well known for its sensitivity to cellular osmolarity changes, such as in the kidney medulla. Accumulated evidence indicates that NFAT5 is also a sensitive factor to stress signals caused by non-hypertonic stimuli such as heat shock, biomechanical stretch stress, ischaemia, infection, etc. These osmolality-related and -unrelated stimuli can induce NFAT5 upregulation, activation and nuclear accumulation, leading to its protective role against various detrimental effects. However, dysregulation of NFAT5 expression may cause pathological conditions in different tissues, leading to a variety of diseases. These protective or pathogenic effects of NFAT5 are dictated by the regulation of its target gene expression and activation of its signalling pathways. Recent studies have found a number of kinases that participate in the phosphorylation/activation of NFAT5 and related signal proteins. Thus, this review will focus on the NFAT5-mediated signal transduction pathways. As for the stimuli that upregulate NFAT5, in addition to the stresses caused by hyperosmotic and non-hyperosmotic environments, other factors such as miRNA, long non-coding RNA, epigenetic modification and viral infection also play an important role in regulating NFAT5 expression; thus, the discussion in this regard is another focus of this review. As the heart, unlike the kidneys, is not normally exposed to hypertonic environments, studies on NFAT5-mediated cardiovascular diseases are just emerging and rapidly progressing. Therefore, we have also added a review on the progress made in this field of research.
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Identification of Potential Gene and MicroRNA Biomarkers of Acute Kidney Injury. BIOMED RESEARCH INTERNATIONAL 2021; 2021:8834578. [PMID: 33506037 PMCID: PMC7810567 DOI: 10.1155/2021/8834578] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Revised: 11/30/2020] [Accepted: 12/16/2020] [Indexed: 12/27/2022]
Abstract
Acute kidney injury (AKI) is a disease that seriously endangers human health. At present, AKI lacks effective treatment methods, so it is particularly important to find effective treatment measures and targets. Bioinformatics analysis has become an important method to identify significant processes of disease occurrence and development. In this study, we analyzed the public expression profile with bioinformatics analysis to identify differentially expressed genes (DEGs) in two types of common AKI models (ischemia-reperfusion injury and cisplatin). DEGs were predicted in four commonly used microRNA databases, and it was found that miR-466 and miR-709 may play important roles in AKI. Then, we found key nodes through protein-protein interaction (PPI) network analysis and subnetwork analysis. Finally, by detecting the expression levels in the renal tissues of the two established AKI models, we found that Myc, Mcm5, E2f1, Oip5, Mdm2, E2f8, miR-466, and miR-709 may be important genes and miRNAs in the process of AKI damage repair. The findings of our study reveal some candidate genes, miRNAs, and pathways potentially involved in the molecular mechanisms of AKI. These data improve the current understanding of AKI and provide new insight for AKI research and treatment.
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Kang K, Liao X, Li Q, Chen J, Niu Y, Zeng Y, Xia S, Zeng L, Liu S, Gou D. A novel tonicity-responsive microRNA miR-23a-5p modulates renal cell survival under osmotic stress through targeting heat shock protein 70 HSPA1B. Am J Physiol Cell Physiol 2020; 320:C225-C239. [PMID: 33206547 DOI: 10.1152/ajpcell.00441.2020] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
There is growing evidence that microRNAs (miRNAs) are implicated in cellular adaptation to osmotic stress, but the underlying osmosignaling pathways are still not completely understood. In this study, we found that a passenger strand miRNA, miR-23a-5p, was significantly downregulated in response to high NaCl treatment in mouse inner medullary collecting duct cells (mIMCD3) through an miRNA profiling assay. The decrease of miR-23a-5p is hypertonicity-dependent and osmotolerant cell type-specific. Knockdown of miR-23a-5p increased cellular survival and proliferation in mIMCD3. In contrast, miR-23a-5p overexpression repressed cell viability and proliferation under hypertonic stress. RNA deep-sequencing revealed that a heat shock protein 70 (HSP70) isoform, HSP70 member 1B (HSPA1B), was significantly increased under hypertonic treatment. Based on the prediction analysis by Gene Ontology (GO), Kyoto Encyclopedia of Genes and Genomes (KEGG), and TargetScan, and a further validation via a dual-luciferase assay, HSPA1B was identified as a potential target of miR-23a-5p. Overexpressed miR-23a-5p suppressed HSPA1B, whereas downregulated miR-23a-5p promoted HSPA1B expression in mIMCD3. In addition, an in vivo study demonstrated that there is a reverse correlation between the levels of miR-23a-5p and HSPA1B in mouse renal inner medulla (papilla) that is exposed to extremely high osmolality. In summary, this study elucidates that passenger strand miR-23a-5p is a novel tonicity-responsive miRNA. The downregulation of miR-23a-5p facilitates cellular adaptation to hypertonic stress in mammalian renal cells through modulating HSPA1B.
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Affiliation(s)
- Kang Kang
- Department of Biochemistry and Molecular Biology, Guangdong Provincial Key Laboratory of Regional Immunity and Diseases, Carson International Cancer Center, Shenzhen University Health Sciences Center, Shenzhen, People's Republic of China
| | - Xiaoyun Liao
- Shenzhen Key Laboratory of Microbial Genetic Engineering, Vascular Disease Research Center, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen, People's Republic of China
| | - Qing Li
- Shenzhen Key Laboratory of Microbial Genetic Engineering, Vascular Disease Research Center, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen, People's Republic of China
| | - Jidong Chen
- Shenzhen Key Laboratory of Microbial Genetic Engineering, Vascular Disease Research Center, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen, People's Republic of China
| | - Yanqin Niu
- Shenzhen Key Laboratory of Microbial Genetic Engineering, Vascular Disease Research Center, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen, People's Republic of China
| | - Yan Zeng
- Shenzhen Key Laboratory of Microbial Genetic Engineering, Vascular Disease Research Center, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen, People's Republic of China
| | - Sijian Xia
- Shenzhen Key Laboratory of Microbial Genetic Engineering, Vascular Disease Research Center, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen, People's Republic of China
| | - Le Zeng
- Shenzhen Key Laboratory of Microbial Genetic Engineering, Vascular Disease Research Center, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen, People's Republic of China
| | - Shide Liu
- Shenzhen Key Laboratory of Microbial Genetic Engineering, Vascular Disease Research Center, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen, People's Republic of China
| | - Deming Gou
- Department of Biochemistry and Molecular Biology, Guangdong Provincial Key Laboratory of Regional Immunity and Diseases, Carson International Cancer Center, Shenzhen University Health Sciences Center, Shenzhen, People's Republic of China.,Shenzhen Key Laboratory of Microbial Genetic Engineering, Vascular Disease Research Center, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen, People's Republic of China
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Ozbaki-Yagan N, Liu X, Bodnar AJ, Ho J, Butterworth MB. Aldosterone-induced microRNAs act as feedback regulators of mineralocorticoid receptor signaling in kidney epithelia. FASEB J 2020; 34:11714-11728. [PMID: 32652691 DOI: 10.1096/fj.201902254rr] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2019] [Revised: 06/17/2020] [Accepted: 06/17/2020] [Indexed: 12/12/2022]
Abstract
The final steps in the Renin-Angiotensin-Aldosterone signaling System (RAAS) involve binding of the corticosteroid hormone, aldosterone to its mineralocorticoid receptor (MR). The bound MR interacts with response elements to induce or repress the transcription of aldosterone-regulated genes. A well characterized aldosterone-induced gene is the serum and glucocorticoid-induced kinase (SGK1), which acts downstream to increase sodium transport in distal kidney nephron epithelial cells. The role of microRNAs (miRs) induced by extended aldosterone stimulation in regulating MR and SGK1 has not been reported. In these studies, miRs predicted to bind to the 3'-UTR of mouse MR were profiled by qRT-PCR after aldosterone stimulation. The miR-466a/b/c/e family was upregulated in mouse kidney cortical collecting duct epithelial cells. A luciferase reporter assay confirmed miR-466 binding to both MR and SGK1 3'-UTRs. Inhibition of miR-466 increased MR and SGK1 mRNA and protein levels. Inhibiting miR-466b and preventing its upregulation after aldosterone stimulation increased amiloride-sensitive sodium transport and sensitivity to aldosterone stimulation. In vivo upregulation of miR-466 was confirmed in distal nephrons of mice on low Na+ diets. Repression of MR and SGK1 by aldosterone-induced miRs may represent a negative feedback loop that contributes to a form of aldosterone escape in vivo.
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Affiliation(s)
- Nejla Ozbaki-Yagan
- Department of Cell Biology, University of Pittsburgh, Pittsburgh, PA, USA
| | - Xiaoning Liu
- Department of Cell Biology, University of Pittsburgh, Pittsburgh, PA, USA
| | - Andrew J Bodnar
- Division of Nephrology, Department of Pediatrics, University of Pittsburgh, Pittsburgh, PA, USA
| | - Jacqueline Ho
- Division of Nephrology, Department of Pediatrics, University of Pittsburgh, Pittsburgh, PA, USA
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Kültz D. Evolution of cellular stress response mechanisms. JOURNAL OF EXPERIMENTAL ZOOLOGY PART 2020; 333:359-378. [PMID: 31970941 DOI: 10.1002/jez.2347] [Citation(s) in RCA: 52] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Revised: 12/19/2019] [Accepted: 01/08/2020] [Indexed: 12/16/2022]
Abstract
The cellular stress response (CSR) is pervasive to all domains of life. It has shaped the interaction between organisms and their environment since the origin of the first cell. Although the CSR has been subject to a myriad of nuanced modifications in the various branches of life present today, its core features remain preserved. The scientific literature covering the CSR is enormous and the broad scope of this brief overview was challenging. However, it is critical to conceptually understand how cells respond to stress in a holistic sense and to point out how fundamental aspects of the CSR framework are integrated. It was necessary to be extremely selective and not feasible to even mention many interesting and important developments in this expansive field. The purpose of this overview is to sketch out general and emerging CSR concepts with an emphasis on the initial cellular strain resulting from stress (macromolecular damage) and the evolutionarily most highly conserved elements of the CSR. Examples emphasize fish and aquatic invertebrates to highlight what is known in organisms beyond mammals, yeast, and other common models. Nonetheless, select pioneering studies using canonical models are also considered and the concepts discussed are applicable to all cells. More detail on important aspects of the CSR in aquatic animals is provided in the accompanying articles of this special issue.
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Affiliation(s)
- Dietmar Kültz
- Department of Animal Sciences, University of California Davis, Davis, California
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11
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Bogusławska J, Popławski P, Alseekh S, Koblowska M, Iwanicka-Nowicka R, Rybicka B, Kędzierska H, Głuchowska K, Hanusek K, Tański Z, Fernie AR, Piekiełko-Witkowska A. MicroRNA-Mediated Metabolic Reprograming in Renal Cancer. Cancers (Basel) 2019; 11:cancers11121825. [PMID: 31756931 PMCID: PMC6966432 DOI: 10.3390/cancers11121825] [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: 10/25/2019] [Accepted: 11/15/2019] [Indexed: 02/07/2023] Open
Abstract
Metabolic reprogramming is one of the hallmarks of renal cell cancer (RCC). We hypothesized that altered metabolism of RCC cells results from dysregulation of microRNAs targeting metabolically relevant genes. Combined large-scale transcriptomic and metabolic analysis of RCC patients tissue samples revealed a group of microRNAs that contribute to metabolic reprogramming in RCC. miRNAs expressions correlated with their predicted target genes and with gas chromatography-mass spectrometry (GC-MS) metabolome profiles of RCC tumors. Assays performed in RCC-derived cell lines showed that miR-146a-5p and miR-155-5p targeted genes of PPP (the pentose phosphate pathway) (G6PD and TKT), the TCA (tricarboxylic acid cycle) cycle (SUCLG2), and arginine metabolism (GATM), respectively. miR-106b-5p and miR-122-5p regulated the NFAT5 osmoregulatory transcription factor. Altered expressions of G6PD, TKT, SUCLG2, GATM, miR-106b-5p, miR-155-5p, and miR-342-3p correlated with poor survival of RCC patients. miR-106b-5p, miR-146a-5p, and miR-342-3p stimulated proliferation of RCC cells. The analysis involving >6000 patients revealed that miR-34a-5p, miR-106b-5p, miR-146a-5p, and miR-155-5p are PanCancer metabomiRs possibly involved in global regulation of cancer metabolism. In conclusion, we found that microRNAs upregulated in renal cancer contribute to disturbed expression of key genes involved in the regulation of RCC metabolome. miR-146a-5p and miR-155-5p emerge as a key “metabomiRs” that target genes of crucial metabolic pathways (PPP (the pentose phosphate pathway), TCA cycle, and arginine metabolism).
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Affiliation(s)
- Joanna Bogusławska
- Department of Biochemistry and Molecular Biology, Centre of Postgraduate Medical Education, ul. Marymoncka 99/103, 01-813 Warsaw, Poland; (J.B.); (P.P.); (B.R.); (H.K.); (K.G.); (K.H.)
| | - Piotr Popławski
- Department of Biochemistry and Molecular Biology, Centre of Postgraduate Medical Education, ul. Marymoncka 99/103, 01-813 Warsaw, Poland; (J.B.); (P.P.); (B.R.); (H.K.); (K.G.); (K.H.)
| | - Saleh Alseekh
- Max-Planck Institute of Molecular Plant Physiology, 14476 Potsdam-Golm, Germany; (S.A.); (A.R.F.)
- Center for Plant Systems Biology and Biotechnology, 4000 Plovdiv, Bulgaria
| | - Marta Koblowska
- Laboratory of Systems Biology, Faculty of Biology, University of Warsaw, 02-106 Warsaw, Poland; (M.K.); (R.I.-N.)
- Laboratory for Microarray Analysis, Institute of Biochemistry and Biophysics, Polish Academy of Sciences, 02-106 Warsaw, Poland
| | - Roksana Iwanicka-Nowicka
- Laboratory of Systems Biology, Faculty of Biology, University of Warsaw, 02-106 Warsaw, Poland; (M.K.); (R.I.-N.)
- Laboratory for Microarray Analysis, Institute of Biochemistry and Biophysics, Polish Academy of Sciences, 02-106 Warsaw, Poland
| | - Beata Rybicka
- Department of Biochemistry and Molecular Biology, Centre of Postgraduate Medical Education, ul. Marymoncka 99/103, 01-813 Warsaw, Poland; (J.B.); (P.P.); (B.R.); (H.K.); (K.G.); (K.H.)
| | - Hanna Kędzierska
- Department of Biochemistry and Molecular Biology, Centre of Postgraduate Medical Education, ul. Marymoncka 99/103, 01-813 Warsaw, Poland; (J.B.); (P.P.); (B.R.); (H.K.); (K.G.); (K.H.)
| | - Katarzyna Głuchowska
- Department of Biochemistry and Molecular Biology, Centre of Postgraduate Medical Education, ul. Marymoncka 99/103, 01-813 Warsaw, Poland; (J.B.); (P.P.); (B.R.); (H.K.); (K.G.); (K.H.)
| | - Karolina Hanusek
- Department of Biochemistry and Molecular Biology, Centre of Postgraduate Medical Education, ul. Marymoncka 99/103, 01-813 Warsaw, Poland; (J.B.); (P.P.); (B.R.); (H.K.); (K.G.); (K.H.)
| | - Zbigniew Tański
- Masovian Specialist Hospital in Ostroleka, 07-410 Ostroleka, Poland;
| | - Alisdair R. Fernie
- Max-Planck Institute of Molecular Plant Physiology, 14476 Potsdam-Golm, Germany; (S.A.); (A.R.F.)
- Center for Plant Systems Biology and Biotechnology, 4000 Plovdiv, Bulgaria
| | - Agnieszka Piekiełko-Witkowska
- Department of Biochemistry and Molecular Biology, Centre of Postgraduate Medical Education, ul. Marymoncka 99/103, 01-813 Warsaw, Poland; (J.B.); (P.P.); (B.R.); (H.K.); (K.G.); (K.H.)
- Correspondence: ; Tel.: +48-22-5693810
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12
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Lee S, Temple FT, Dawson PA. Kidney microRNA profile in pregnant mice reveals molecular insights into kidney adaptation to pregnancy: A pilot study. Mol Genet Metab Rep 2019; 20:100486. [PMID: 31249785 PMCID: PMC6587019 DOI: 10.1016/j.ymgmr.2019.100486] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Revised: 06/12/2019] [Indexed: 02/06/2023] Open
Abstract
The maternal kidneys undergo numerous physiological changes during pregnancy to maintain a healthy pregnancy for mother and child. Over the past decade, interest in microRNAs (miRNAs) for regulating gene expression during pregnancy has expanded. However, the role of miRNAs in modulating kidney physiology during pregnancy has not been extensively investigated. In this study, miRNome profiling suggested differential expression of 163 miRNAs (of 887 miRNAs detected) in the kidneys from pregnant mice at 6.5 days gestation when compared to non-pregnant female mice, of which 35 and 128 miRNAs were potentially down- and up-regulated, respectively. We performed network and pathway analyses of the >1700 potential mRNA targets of the differentially expressed miRNAs using MiRNet, Gene Ontology, Reactome and KEGG analyses. The mRNA targets were over-represented in numerous cellular signalling pathways, including cellular protective responses. In addition, we explored 13 and 29 potential differentially expressed miRNAs to have putative binding sites in the Slc13a1 and Slc26a1 sulfate transporter mRNAs, respectively, and that decreased levels of mir-466k may potentially explain the increased expression of these sulfate transporters in early mouse gestation. Collectively, this study suggests altered expression levels of miRNAs during mouse gestation, which provides pilot data for future investigations into the molecular events that modulate kidney adaptsation to pregnancy.
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Affiliation(s)
- Soohyun Lee
- Mater Research Institute, University of Queensland, Brisbane, Queensland, Australia
| | - Fergal Thomas Temple
- Mater Research Institute, University of Queensland, Brisbane, Queensland, Australia
| | - Paul Anthony Dawson
- Mater Research Institute, University of Queensland, Brisbane, Queensland, Australia
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13
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Abstract
The mineralocorticoid hormone aldosterone is released by the adrenal glands in a homeostatic mechanism to regulate blood volume. Several cues elicit aldosterone release, and the long-term action of the hormone is to restore blood pressure and/or increase the retrieval of sodium from filtered plasma in the kidney. While the signaling cascade that results in aldosterone release is well studied, the impact of this hormone on tissues and cells in various organ systems is pleotropic. Emerging evidence indicates aldosterone may alter non-coding RNAs (ncRNAs) to integrate the hormonal response, and these ncRNAs may contribute to the heterogeneity of signaling outcomes in aldosterone target tissues. The best studied of the ncRNAs in aldosterone action are the small ncRNAs, microRNAs. MicroRNA expression is regulated by aldosterone stimulation, and microRNAs are able to modulate protein expression at all steps in the renin-angiotensin-aldosterone-signaling system. The discovery and synthesis of microRNAs will be briefly covered followed by a discussion of the reciprocal role of aldosterone/microRNA regulation, including misregulation of microRNA signaling in aldosterone-linked disease states.
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14
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Nawata CM, Pannabecker TL. Mammalian urine concentration: a review of renal medullary architecture and membrane transporters. J Comp Physiol B 2018; 188:899-918. [PMID: 29797052 PMCID: PMC6186196 DOI: 10.1007/s00360-018-1164-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2018] [Revised: 04/23/2018] [Accepted: 05/14/2018] [Indexed: 01/10/2023]
Abstract
Mammalian kidneys play an essential role in balancing internal water and salt concentrations. When water needs to be conserved, the renal medulla produces concentrated urine. Central to this process of urine concentration is an osmotic gradient that increases from the corticomedullary boundary to the inner medullary tip. How this gradient is generated and maintained has been the subject of study since the 1940s. While it is generally accepted that the outer medulla contributes to the gradient by means of an active process involving countercurrent multiplication, the source of the gradient in the inner medulla is unclear. The last two decades have witnessed advances in our understanding of the urine-concentrating mechanism. Details of medullary architecture and permeability properties of the tubules and vessels suggest that the functional and anatomic relationships of these structures may contribute to the osmotic gradient necessary to concentrate urine. Additionally, we are learning more about the membrane transporters involved and their regulatory mechanisms. The role of medullary architecture and membrane transporters in the mammalian urine-concentrating mechanism are the focus of this review.
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Affiliation(s)
- C Michele Nawata
- Department of Physiology, Banner University Medical Center, University of Arizona, 1501 N. Campbell Avenue, Tucson, AZ, 85724-5051, USA.
| | - Thomas L Pannabecker
- Department of Physiology, Banner University Medical Center, University of Arizona, 1501 N. Campbell Avenue, Tucson, AZ, 85724-5051, USA
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15
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Becker W, Nagarkatti M, Nagarkatti PS. miR-466a Targeting of TGF-β2 Contributes to FoxP3 + Regulatory T Cell Differentiation in a Murine Model of Allogeneic Transplantation. Front Immunol 2018; 9:688. [PMID: 29686677 PMCID: PMC5900016 DOI: 10.3389/fimmu.2018.00688] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Accepted: 03/20/2018] [Indexed: 12/25/2022] Open
Abstract
The promise of inducing immunological tolerance through regulatory T cell (Treg) control of effector T cell function is crucial for developing future therapeutic strategies to treat allograft rejection as well as inflammatory autoimmune diseases. In the current study, we used murine allograft rejection as a model to identify microRNA (miRNA) regulation of Treg differentiation from naïve CD4 cells. We performed miRNA expression array in CD4+ T cells in the draining lymph node (dLN) of mice which received syngeneic or allogeneic grafts to determine the molecular mechanisms that hinder the expansion of Tregs. We identified an increase in miRNA cluster 297-669 (C2MC) after allogeneic transplantation, in CD4+ T cells, such that 10 of the 27 upregulated miRNAs were all from this cluster, with one of its members, mmu-miR-466a-3p (miR-466a-3p), targeting transforming growth factor beta 2 (TGF-β2), as identified through reporter luciferase assay. Transfection of miR-466a-3p in CD4+ T cells led to a decreased inducible FoxP3+ Treg generation while inhibiting miR-466a-3p expression through locked nucleic acid resulting in increased Tregs and a reduction in effector T cells. Furthermore, in vivo inhibition of miR-466a-3p in an allogeneic skin-graft model attenuated T cell response against the graft through an increase in TGF-β2. TGF-β2 was as effective as TGF-β1 at both inducing Tregs and through adoptive transfer, mitigating host effector T cell response against the allograft. Together, the current study demonstrates for the first time a new role for miRNA-466a-3p and TGF-β2 in the regulation of Treg differentiation and thus offers novel avenues to control inflammatory disorders.
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Affiliation(s)
| | | | - Prakash S. Nagarkatti
- Department of Pathology, Microbiology and Immunology, University of South Carolina School of Medicine, Columbia, SC, United States
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16
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Liu JT, Bain LJ. Arsenic Induces Members of the mmu-miR-466-669 Cluster Which Reduces NeuroD1 Expression. Toxicol Sci 2018; 162:64-78. [PMID: 29121352 PMCID: PMC6693399 DOI: 10.1093/toxsci/kfx241] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
Chronic arsenic exposure can result in adverse development effects including decreased intellectual function, reduced birth weight, and altered locomotor activity. Previous in vitro studies have shown that arsenic inhibits stem cell differentiation. MicroRNAs (miRNAs) are small noncoding RNAs that regulate multiple cellular processes including embryonic development and cell differentiation. The purpose of this study was to examine whether altered miRNA expression was a mechanism by which arsenic inhibited cellular differentiation. The pluripotent P19 mouse embryonal carcinoma cells were exposed to 0 or 0.5 μM sodium arsenite for 9 days during cell differentiation, and changes in miRNA expression was analyzed using microarrays. We found that the expression of several miRNAs important in cellular differentiation, such as miR-9 and miR-199 were decreased by 1.9- and 1.6-fold, respectively, following arsenic exposure, while miR-92a, miR-291a, and miR-709 were increased by 3-, 3.7-, and 1.6-fold, respectively. The members of the miR-466-669 cluster and its host gene, Scm-like with 4 Mbt domains 2 (Sfmbt2), were significantly induced by arsenic from 1.5- to 4-fold in a time-dependent manner. Multiple miRNA target prediction programs revealed that several neurogenic transcription factors appear to be targets of the cluster. When consensus anti-miRNAs targeting the miR-466-669 cluster were transfected into P19 cells, arsenic-exposed cells were able to more effectively differentiate. The consensus anti-miRNAs appeared to rescue the inhibitory effects of arsenic on cell differentiation due to an increased expression of NeuroD1. Taken together, we conclude that arsenic induces the miR-466-669 cluster, and that this induction acts to inhibit cellular differentiation in part due to a repression of NeuroD1.
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Affiliation(s)
| | - Lisa J Bain
- Environmental Toxicology Graduate Program
- Department of Biological Sciences, Clemson University, Clemson, South Carolina 29634
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17
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Cyclosporine A alters expression of renal microRNAs: New insights into calcineurin inhibitor nephrotoxicity. PLoS One 2017; 12:e0175242. [PMID: 28414804 PMCID: PMC5393575 DOI: 10.1371/journal.pone.0175242] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2016] [Accepted: 03/22/2017] [Indexed: 12/21/2022] Open
Abstract
Calcineurin inhibitors are powerful immunosuppressants that revolutionized organ transplantation. However, non-immune effects of the calcineurin inhibitor, such as cyclosporine A (CsA), have significantly hindered their use. Specifically, nephrotoxicity, which is associated with tubulointerstitial fibrosis, inflammation, and podocyte damage, affects up to half of all transplant patients. Calcineurin is involved in many aspects of kidney development and function; therefore, mechanisms of CsA-induced nephrotoxicity are complex and not yet fully understood. MicroRNAs are short non-coding RNAs that regulate protein-coding RNA expression through post-translational repression of target messenger RNAs. MicroRNA dysregulation is known to be involved in kidney diseases including fibrosis. In this study, we compared the renal microRNA expression profiles between mice that received CsA (20 mg/kg) or vehicle daily for six weeks. The results demonstrate that CsA induces significant changes in renal microRNA expression profile. We used combined criteria of False Discovery Rate (≤0.1), fold change (≥2) and median signal strength (≥50) and identified 76 differencially expressed microRNAs. This approach identified microRNAs previously linked to renal fibrosis that includes let-7d, miR-21, miR-29, miR-30, miR-130, miR-192, and miR-200 as well as microRNAs that have not been reported to be related to nephrotoxicity or immunosuppression. Pathway analysis of microRNA/mRNA changes highlights the Wnt, TGF-β, mTOR, and VEGF pathways. The mRNA expression profiles were compared in the same samples. The change of mRNA and microRNA profiles showed close correlations. To validate that the observed microRNA and mRNA expression level changes in mice kidney tissue were directly related to CsA treatment, the expression change induced by CsA treatment of three microRNAs (miR-21, miR-186, and miR-709) and three mRNAs (BMPR1a, SMURF1 and SMAD7) were compared in HEK293 cell line. A similar trend of expression level change was induced by CsA treatment in all selected microRNAs and mRNAs in the in vitro cell model. These data provide a roadmap for future work to study the role of the known and novel candidate microRNAs in the mechanism of nephrotoxicity and their further therapeutic potential.
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18
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Böger CA, Gorski M, McMahon GM, Xu H, Chang YPC, van der Most PJ, Navis G, Nolte IM, de Borst MH, Zhang W, Lehne B, Loh M, Tan ST, Boerwinkle E, Grams ME, Sekula P, Li M, Wilmot B, Moon JG, Scheet P, Cucca F, Xiao X, Lyytikäinen LP, Delgado G, Grammer TB, Kleber ME, Sedaghat S, Rivadeneira F, Corre T, Kutalik Z, Bergmann S, Nielson CM, Srikanth P, Teumer A, Müller-Nurasyid M, Brockhaus AC, Pfeufer A, Rathmann W, Peters A, Matsumoto M, de Andrade M, Atkinson EJ, Robinson-Cohen C, de Boer IH, Hwang SJ, Heid IM, Gögele M, Concas MP, Tanaka T, Bandinelli S, Nalls MA, Singleton A, Tajuddin SM, Adeyemo A, Zhou J, Doumatey A, McWeeney S, Murabito J, Franceschini N, Flessner M, Shlipak M, Wilson JG, Chen G, Rotimi CN, Zonderman AB, Evans MK, Ferrucci L, Devuyst O, Pirastu M, Shuldiner A, Hicks AA, Pramstaller PP, Kestenbaum B, Kardia SLR, Turner ST, Study LC, Briske TE, Gieger C, Strauch K, Meisinger C, Meitinger T, Völker U, Nauck M, Völzke H, Vollenweider P, Bochud M, Waeber G, Kähönen M, Lehtimäki T, März W, Dehghan A, Franco OH, Uitterlinden AG, Hofman A, Taylor HA, Chambers JC, Kooner JS, Fox CS, Hitzemann R, Orwoll ES, Pattaro C, Schlessinger D, Köttgen A, Snieder H, Parsa A, Cohen DM. NFAT5 and SLC4A10 Loci Associate with Plasma Osmolality. J Am Soc Nephrol 2017; 28:2311-2321. [PMID: 28360221 DOI: 10.1681/asn.2016080892] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2016] [Accepted: 02/02/2017] [Indexed: 12/20/2022] Open
Abstract
Disorders of water balance, an excess or deficit of total body water relative to body electrolyte content, are common and ascertained by plasma hypo- or hypernatremia, respectively. We performed a two-stage genome-wide association study meta-analysis on plasma sodium concentration in 45,889 individuals of European descent (stage 1 discovery) and 17,637 additional individuals of European descent (stage 2 replication), and a transethnic meta-analysis of replicated single-nucleotide polymorphisms in 79,506 individuals (63,526 individuals of European descent, 8765 individuals of Asian Indian descent, and 7215 individuals of African descent). In stage 1, we identified eight loci associated with plasma sodium concentration at P<5.0 × 10-6 Of these, rs9980 at NFAT5 replicated in stage 2 meta-analysis (P=3.1 × 10-5), with combined stages 1 and 2 genome-wide significance of P=5.6 × 10-10 Transethnic meta-analysis further supported the association at rs9980 (P=5.9 × 10-12). Additionally, rs16846053 at SLC4A10 showed nominally, but not genome-wide, significant association in combined stages 1 and 2 meta-analysis (P=6.7 × 10-8). NFAT5 encodes a ubiquitously expressed transcription factor that coordinates the intracellular response to hypertonic stress but was not previously implicated in the regulation of systemic water balance. SLC4A10 encodes a sodium bicarbonate transporter with a brain-restricted expression pattern, and variant rs16846053 affects a putative intronic NFAT5 DNA binding motif. The lead variants for NFAT5 and SLC4A10 are cis expression quantitative trait loci in tissues of the central nervous system and relevant to transcriptional regulation. Thus, genetic variation in NFAT5 and SLC4A10 expression and function in the central nervous system may affect the regulation of systemic water balance.
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Affiliation(s)
- Carsten A Böger
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Mathias Gorski
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Gearoid M McMahon
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Huichun Xu
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Yen-Pei C Chang
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Peter J van der Most
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Gerjan Navis
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Ilja M Nolte
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Martin H de Borst
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Weihua Zhang
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Benjamin Lehne
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Marie Loh
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Sian-Tsung Tan
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Eric Boerwinkle
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Morgan E Grams
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Peggy Sekula
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Man Li
- Due to the number of contributing authors, the affiliations are listed in the supplemental material.
| | - Beth Wilmot
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - James G Moon
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Paul Scheet
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Francesco Cucca
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Xiangjun Xiao
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Leo-Pekka Lyytikäinen
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Graciela Delgado
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Tanja B Grammer
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Marcus E Kleber
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Sanaz Sedaghat
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Fernando Rivadeneira
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Tanguy Corre
- Due to the number of contributing authors, the affiliations are listed in the supplemental material.
| | - Zoltan Kutalik
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Sven Bergmann
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Carrie M Nielson
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Priya Srikanth
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Alexander Teumer
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Martina Müller-Nurasyid
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Anne Catharina Brockhaus
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Arne Pfeufer
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Wolfgang Rathmann
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Annette Peters
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Martha Matsumoto
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Mariza de Andrade
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Elizabeth J Atkinson
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Cassianne Robinson-Cohen
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Ian H de Boer
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Shih-Jen Hwang
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Iris M Heid
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Martin Gögele
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Maria Pina Concas
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Toshiko Tanaka
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Stefania Bandinelli
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Mike A Nalls
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Andrew Singleton
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Salman M Tajuddin
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Adebowale Adeyemo
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Jie Zhou
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Ayo Doumatey
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Shannon McWeeney
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Joanne Murabito
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Nora Franceschini
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Michael Flessner
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Michael Shlipak
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - James G Wilson
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Guanjie Chen
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Charles N Rotimi
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Alan B Zonderman
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Michele K Evans
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Luigi Ferrucci
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Olivier Devuyst
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Mario Pirastu
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Alan Shuldiner
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Andrew A Hicks
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Peter Paul Pramstaller
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Bryan Kestenbaum
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Sharon L R Kardia
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Stephen T Turner
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - LifeLines Cohort Study
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Tamara Ellefson Briske
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Christian Gieger
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Konstantin Strauch
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Christa Meisinger
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Thomas Meitinger
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Uwe Völker
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Matthias Nauck
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Henry Völzke
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Peter Vollenweider
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Murielle Bochud
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Gerard Waeber
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Mika Kähönen
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Terho Lehtimäki
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Winfried März
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Abbas Dehghan
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Oscar H Franco
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Andre G Uitterlinden
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Albert Hofman
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Herman A Taylor
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - John C Chambers
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Jaspal S Kooner
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Caroline S Fox
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Robert Hitzemann
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Eric S Orwoll
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Cristian Pattaro
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - David Schlessinger
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Anna Köttgen
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Harold Snieder
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - Afshin Parsa
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
| | - David M Cohen
- Due to the number of contributing authors, the affiliations are listed in the supplemental material
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19
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Wang JM, Qiu Y, Yang ZQ, Li L, Zhang K. Inositol-Requiring Enzyme 1 Facilitates Diabetic Wound Healing Through Modulating MicroRNAs. Diabetes 2017; 66:177-192. [PMID: 27634225 PMCID: PMC5204310 DOI: 10.2337/db16-0052] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/11/2016] [Accepted: 09/09/2016] [Indexed: 12/12/2022]
Abstract
Diabetic skin ulcers represent a challenging clinical problem with mechanisms not fully understood. In this study, we investigated the role and mechanism for the primary unfolded protein response (UPR) transducer inositol-requiring enzyme 1 (IRE1α) in diabetic wound healing. Bone marrow-derived progenitor cells (BMPCs) were isolated from adult male type 2 diabetic and their littermate control mice. In diabetic BMPCs, IRE1α protein expression and phosphorylation were repressed. The impaired diabetic BMPC angiogenic function was rescued by adenovirus-mediated expression of IRE1α but not by the RNase-inactive IRE1α or the activated X-box binding protein 1 (XBP1), the canonical IRE1α target. In fact, IRE1α RNase processes a subset of microRNAs (miRs), including miR-466 and miR-200 families, through which IRE1α plays an important role in maintaining BMPC function under the diabetic condition. IRE1α attenuated maturation of miR-466 and miR-200 family members at precursor miR levels through the regulated IRE1α-dependent decay (RIDD) independent of XBP1. IRE1α deficiency in diabetes resulted in a burst of functional miRs from miR-466 and miR-200 families, which directly target and repress the mRNA encoding the angiogenic factor angiopoietin 1 (ANGPT1), leading to decreased ANGPT1 expression and disrupted angiogenesis. Importantly, cell therapies using IRE1α-expressing BMPCs or direct IRE1α gene transfer significantly accelerated cutaneous wound healing in diabetic mice through facilitating angiogenesis. In conclusion, our studies revealed a novel mechanistic basis for rescuing angiogenesis and tissue repair in diabetic wound treatments.
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Affiliation(s)
- Jie-Mei Wang
- Center for Molecular Medicine and Genetics, Wayne State University, Detroit, MI
- Department of Pharmaceutical Sciences, Eugene Applebaum College of Pharmacy and Health Sciences, Wayne State University, Detroit, MI
| | - Yining Qiu
- Center for Molecular Medicine and Genetics, Wayne State University, Detroit, MI
| | - Zeng-Quan Yang
- Karmanos Cancer Institute, Wayne State University, Detroit, MI
| | - Li Li
- Center for Molecular Medicine and Genetics, Wayne State University, Detroit, MI
- Department of Internal Medicine, Wayne State University School of Medicine, Detroit, MI
| | - Kezhong Zhang
- Center for Molecular Medicine and Genetics, Wayne State University, Detroit, MI
- Karmanos Cancer Institute, Wayne State University, Detroit, MI
- Department of Immunology and Microbiology, Wayne State University School of Medicine, Detroit, MI
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20
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Butterworth MB. MicroRNAs and the regulation of aldosterone signaling in the kidney. Am J Physiol Cell Physiol 2015; 308:C521-7. [PMID: 25673770 DOI: 10.1152/ajpcell.00026.2015] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2015] [Accepted: 02/11/2015] [Indexed: 01/22/2023]
Abstract
The role of small noncoding RNAs, termed microRNAs (miRs), in development and disease has been recognized for many years. The number of miRs and regulated targets that reinforce a role for miRs in human disease and disease progression is ever-increasing. However, less is known about the involvement of miRs in steady-state, nondisease homeostatic pathways. In the kidney, much of the regulated ion transport is under the control of hormonal signaling. Evidence is emerging that miRs are involved in the hormonal regulation of kidney function and, particularly, in ion transport. In this short review, the production and intra- and extracellular signaling of miRs and the involvement of miRs in kidney disease are discussed. The discussion also focuses on the role of these small biological molecules in the homeostatic control of ion transport in the kidney. MiR regulation of and by corticosteroid hormones, in particular the mineralocorticoid hormone aldosterone, is considered. While information about the role of aldosterone-regulated miRs in the kidney is limited, an increase in the research in this area will undoubtedly highlight the involvement of miRs as central mediators of hormonal signaling in normal physiology.
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Affiliation(s)
- Michael B Butterworth
- Department of Cell Biology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
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21
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Seo M, Choi JS, Rho CR, Joo CK, Lee SK. MicroRNA miR-466 inhibits Lymphangiogenesis by targeting prospero-related homeobox 1 in the alkali burn corneal injury model. J Biomed Sci 2015; 22:3. [PMID: 25573115 PMCID: PMC4304626 DOI: 10.1186/s12929-014-0104-0] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2014] [Accepted: 12/03/2014] [Indexed: 12/21/2022] Open
Abstract
Background Lymphangiogenesis is one of the major causes of corneal graft rejection. Among the lymphangiogenic factors, vascular endothelial growth factor (VEGF)-C and -D are considered to be the most potent. Both bind to VEGF receptor 3 (VEGFR3) to activate Prospero homeobox 1 (Prox1), a transcription factor essential for the development and maintenance of lymphatic vasculature. MicroRNAs (miRNAs) bind to the 3' untranslated regions (3' UTRs) of target genes in a sequence-specific manner and suppress gene expression. In the current study, we searched for miRNAs that target the pro-lymphangiogenic factor Prox1. Results Among the miRNAs predicted by the bioinformatic analysis to seed match with the 3' UTR of Prox-1, we chose 3 (miR-466, miR-4305, and miR-4795-5p) for further investigation. Both the miR-466 and miR-4305 mimics, but not the miR-4795-5p mimic, significantly reduced the luciferase activity of the Prox-1 3' UTR reporter vector. In primary lymphatic endothelial cells (HDLEC), miR-466 mimic transfection suppressed Prox1 mRNA and protein expression, while miR-4305 mimic transfection did not. Experiments using mutated reporter constructs of the two possible seed match sites on the 3' UTR of Prox1 suggested that the target site 2 directly bound miR-466. HDLEC transfected with the miR-466 mimic suppressed tube formation as compared to the scrambled control. Furthermore, HDLEC transfected with a miR-466 inhibitor showed enhanced tube formation as compared to control inhibitor transfected cells, and this inhibitory effect was counteracted by Prox1 siRNA. The miR-466 mimic reduced angiogenesis and lymphangiogenesis resulting in clearer corneas in an cornea injury rat model compared to the scrambled control. Conclusions Our data suggest that miR-446 may have a protective effect on transplanted corneas by suppressing Prox1 expression at the post-transcriptional level. The results of the current study may provide insights into the mechanisms of lymphangiogenesis resulting from corneal graft rejection and alkali-burn injuries, as well as into the development of new treatments for lymphangiogenic eye diseases. Electronic supplementary material The online version of this article (doi:10.1186/s12929-014-0104-0) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Minkoo Seo
- Department of Medical Lifescience, College of Medicine, The Catholic University of Korea, Seoul, Korea.
| | - Jun-Sub Choi
- Catholic Institute for Visual Science, College of Medicine, The Catholic University of Korea, Seoul, Korea.
| | - Chang Rae Rho
- Catholic Institute for Visual Science, College of Medicine, The Catholic University of Korea, Seoul, Korea. .,Department of Ophthalmology and Visual Science, Daejeon St. Mary's Hospital, Daejeon, Korea.
| | - Choun-Ki Joo
- Catholic Institute for Visual Science, College of Medicine, The Catholic University of Korea, Seoul, Korea. .,Department of Ophthalmology and Visual Science, Seoul St. Mary's Hospital, Seoul, Korea.
| | - Suk Kyeong Lee
- Department of Medical Lifescience, College of Medicine, The Catholic University of Korea, Seoul, Korea.
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22
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miR-466 is putative negative regulator of Coxsackie virus and Adenovirus Receptor. FEBS Lett 2014; 589:246-54. [PMID: 25497012 DOI: 10.1016/j.febslet.2014.12.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2014] [Revised: 11/18/2014] [Accepted: 12/02/2014] [Indexed: 01/01/2023]
Abstract
This study aimed at elucidating how Coxsackie B virus (CVB) perturbs the host's microRNA (miRNA) regulatory pathways that lead to antiviral events. The results of miRNA profiling in rat pancreatic cells infection models revealed that rat rno-miR-466d was up-regulated in CVB infection. Furthermore, in silico studies showed that Coxsackie virus and Adenovirus Receptor (CAR), a cellular receptor, was one of the rno-miR-466d targets involved in viral entry. Subsequent experiments also proved that both the rno-miR-466d and the human hsa-miR-466, which are orthologs of the miR-467 gene family, could effectively down-regulate the levels of rat and human CAR protein expression, respectively.
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23
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Diet-induced obesity modulates epigenetic responses to ionizing radiation in mice. PLoS One 2014; 9:e106277. [PMID: 25171162 PMCID: PMC4149562 DOI: 10.1371/journal.pone.0106277] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2013] [Accepted: 08/05/2014] [Indexed: 01/16/2023] Open
Abstract
Both exposure to ionizing radiation and obesity have been associated with various pathologies including cancer. There is a crucial need in better understanding the interactions between ionizing radiation effects (especially at low doses) and other risk factors, such as obesity. In order to evaluate radiation responses in obese animals, C3H and C57BL/6J mice fed a control normal fat or a high fat (HF) diet were exposed to fractionated doses of X-rays (0.75 Gy ×4). Bone marrow micronucleus assays did not suggest a modulation of radiation-induced genotoxicity by HF diet. Using MSP, we observed that the promoters of p16 and Dapk genes were methylated in the livers of C57BL/6J mice fed a HF diet (irradiated and non-irradiated); Mgmt promoter was methylated in irradiated and/or HF diet-fed mice. In addition, methylation PCR arrays identified Ep300 and Socs1 (whose promoters exhibited higher methylation levels in non-irradiated HF diet-fed mice) as potential targets for further studies. We then compared microRNA regulations after radiation exposure in the livers of C57BL/6J mice fed a normal or an HF diet, using microRNA arrays. Interestingly, radiation-triggered microRNA regulations observed in normal mice were not observed in obese mice. miR-466e was upregulated in non-irradiated obese mice. In vitro free fatty acid (palmitic acid, oleic acid) administration sensitized AML12 mouse liver cells to ionizing radiation, but the inhibition of miR-466e counteracted this radio-sensitization, suggesting that the modulation of radiation responses by diet-induced obesity might involve miR-466e expression. All together, our results suggested the existence of dietary effects on radiation responses (especially epigenetic regulations) in mice, possibly in relationship with obesity-induced chronic oxidative stress.
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