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Chipman LB, Luc S, Nicastro IA, Hulahan JJ, Dann DC, Bodas DM, Pasquinelli AE. Expression, not sequence, distinguishes miR-238 from its miR-239ab sister miRNAs in promoting longevity in Caenorhabditis elegans. PLoS Genet 2023; 19:e1011055. [PMID: 38011256 PMCID: PMC10703411 DOI: 10.1371/journal.pgen.1011055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Revised: 12/07/2023] [Accepted: 11/07/2023] [Indexed: 11/29/2023] Open
Abstract
MicroRNAs (miRNAs) regulate gene expression by base-pairing to target sequences in messenger RNAs (mRNAs) and recruiting factors that induce translational repression and mRNA decay. In animals, nucleotides 2-8 at the 5' end of the miRNA, called the seed region, are often necessary and sometimes sufficient for functional target interactions. MiRNAs that contain identical seed sequences are grouped into families where individual members have the potential to share targets and act redundantly. A rare exception seemed to be the miR-238/239ab family in Caenorhabditis elegans, as previous work indicated that loss of miR-238 reduced lifespan while deletion of the miR-239ab locus resulted in enhanced longevity and thermal stress resistance. Here, we re-examined these potentially opposing roles using new strains that individually disrupt each miRNA sister. We confirmed that loss of miR-238 is associated with a shortened lifespan but could detect no longevity or stress phenotypes in animals lacking miR-239a or miR-239b, individually or in combination. Additionally, dozens of genes were mis-regulated in miR-238 mutants but almost no gene expression changes were detected in either miR-239a or miR-239b mutants compared to wild type animals. We present evidence that the lack of redundancy between miR-238 and miR-239ab is independent of their sequence differences; miR-239a or miR-239b could substitute for the longevity role of miR-238 when expressed from the miR-238 locus. Altogether, these studies disqualify miR-239ab as negative regulators of aging and demonstrate that expression, not sequence, dictates the specific role of miR-238 in promoting longevity.
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Affiliation(s)
- Laura B. Chipman
- Molecular Biology Department, School of Biological Sciences, University of California, San Diego, La Jolla, California, United States of America
| | - San Luc
- Molecular Biology Department, School of Biological Sciences, University of California, San Diego, La Jolla, California, United States of America
| | - Ian A. Nicastro
- Molecular Biology Department, School of Biological Sciences, University of California, San Diego, La Jolla, California, United States of America
| | - Jesse J. Hulahan
- Molecular Biology Department, School of Biological Sciences, University of California, San Diego, La Jolla, California, United States of America
| | - Delaney C. Dann
- Molecular Biology Department, School of Biological Sciences, University of California, San Diego, La Jolla, California, United States of America
| | - Devavrat M. Bodas
- Molecular Biology Department, School of Biological Sciences, University of California, San Diego, La Jolla, California, United States of America
| | - Amy E. Pasquinelli
- Molecular Biology Department, School of Biological Sciences, University of California, San Diego, La Jolla, California, United States of America
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Xu C, Wang P, Guo H, Shao C, Liao B, Gong S, Zhou Y, Yang B, Jiang H, Zhang G, Wu N. MiR-146a-5p deficiency in extracellular vesicles of glioma-associated macrophages promotes epithelial-mesenchymal transition through the NF-κB signaling pathway. Cell Death Discov 2023; 9:206. [PMID: 37391426 DOI: 10.1038/s41420-023-01492-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2022] [Revised: 06/05/2023] [Accepted: 06/15/2023] [Indexed: 07/02/2023] Open
Abstract
Glioma-associated macrophages (GAMs) are pivotal chains in the tumor immune microenvironment (TIME). GAMs mostly display M2-like phenotypes with anti-inflammatory features related to the malignancy and progression of cancers. Extracellular vesicles derived from immunosuppressive GAMs (M2-EVs), the essential components of the TIME, greatly impact the malignant behavior of GBM cells. M1- or M2-EVs were isolated in vitro, and human GBM cell invasion and migration were reinforced under M2-EV treatment. Signatures of the epithelial-mesenchymal transition (EMT) were also enhanced by M2-EVs. Compared with M1-EVs, miR-146a-5p, considered the key factor in TIME regulation, was deficient in M2-EVs according to miRNA-sequencing. When the miR-146a-5p mimic was added, EMT signatures and the invasive and migratory abilities of GBM cells were correspondingly weakened. Public databases predicted the miRNA binding targets and interleukin 1 receptor-associated kinase 1 (IRAK1) and tumor necrosis factor receptor-associated factor 6 (TRAF6) were screened as miR-146a-5p binding genes. Bimolecular fluorescent complementation and coimmunoprecipitation confirmed interactions between TRAF6 and IRAK1. The correlation between TRAF6 and IRAK1 was evaluated with immunofluorescence (IF)-stained clinical glioma samples. The TRAF6-IRAK1 complex is the switch and the brake that modulates IKK complex phosphorylation and NF-κB pathway activation, as well as the EMT behaviors of GBM cells. Furthermore, a homograft nude mouse model was explored and mice transplanted with TRAF6/IRAK1-overexpressing glioma cells had shorter survival times while mice transplanted with glioma cells with miR-146a-5p overexpression or TRAF6/IRAK1 knockdown lived longer. This work indicated that in the TIME of GBM, the deficiency of miR-146a-5p in M2-EVs enhances tumor EMT through disinhibition of the TRAF6-IRAK1 complex and IKK-dependent NF-κB signaling pathway providing a novel therapeutic strategy targeting the TIME of GBM.
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Affiliation(s)
- Chao Xu
- Chongqing Medical University, Chongqing, China
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, China
- Chongqing School, University of Chinese Academy of Sciences, Chongqing, China
- Department of Neurosurgery, Chongqing General Hospital, Chongqing, China
| | - Pan Wang
- Chongqing Medical University, Chongqing, China
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, China
- Chongqing School, University of Chinese Academy of Sciences, Chongqing, China
- Department of Neurosurgery, Chongqing General Hospital, Chongqing, China
| | - Haiyan Guo
- Department of Neurosurgery, Chongqing General Hospital, Chongqing, China
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Chuan Shao
- Chongqing Medical University, Chongqing, China
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, China
- Chongqing School, University of Chinese Academy of Sciences, Chongqing, China
- Department of Neurosurgery, Chongqing General Hospital, Chongqing, China
| | - Bin Liao
- Chongqing Medical University, Chongqing, China
- Department of Neurosurgery, Chongqing General Hospital, Chongqing, China
| | - Sheng Gong
- Department of Neurosurgery, Chongqing General Hospital, Chongqing, China
| | - Yanghao Zhou
- Department of Neurosurgery, Chongqing General Hospital, Chongqing, China
| | - Bingjie Yang
- Department of Neurosurgery, Chongqing General Hospital, Chongqing, China
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Haotian Jiang
- Chongqing Medical University, Chongqing, China
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, China
- Chongqing School, University of Chinese Academy of Sciences, Chongqing, China
- Department of Neurosurgery, Chongqing General Hospital, Chongqing, China
| | - Gang Zhang
- Chongqing Medical University, Chongqing, China
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, China
- Chongqing School, University of Chinese Academy of Sciences, Chongqing, China
- Department of Neurosurgery, Chongqing General Hospital, Chongqing, China
| | - Nan Wu
- Chongqing Medical University, Chongqing, China.
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, China.
- Chongqing School, University of Chinese Academy of Sciences, Chongqing, China.
- Department of Neurosurgery, Chongqing General Hospital, Chongqing, China.
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Jin J, Yang Z, Liu H, Guo M, Chen B, Zhu H, Wang Y, Lin J, Wang S, Chen S. Effects of acupuncture on the miR-146a-mediated IRAK1/TRAF6/NF-κB signaling pathway in rats with sarcopenia induced by D-galactose. ANNALS OF TRANSLATIONAL MEDICINE 2023; 11:47. [PMID: 36819511 PMCID: PMC9929824 DOI: 10.21037/atm-22-6082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Accepted: 01/03/2023] [Indexed: 01/15/2023]
Abstract
Background Sarcopenia during aging is closely linked to sterile, low-grade, chronic inflammation. However, considering the increasingly aging global population, the effectiveness of existing treatments for sarcopenia is not exact, and acupuncture, as an effective anti-inflammatory therapy, has the potential to treat it. Methods Fifty Sprague-Dawley rats were randomly allocated into five groups, including Control group, D-galactose (D-gal) group, D-gal + acupuncture (DA) group, D-gal + non-acupoint (DN) group and D-gal amino acid mixture (DAA) group. An aging rat was model constructed using D-gal for 12 weeks. Rats in the control group received 0.9% physiological saline daily. Treatment groups were acupunctured or given amino acid mixture interventions daily, and lasted for last 4 consecutive weeks. The effects of acupuncture were evaluated by the hematoxylin and eosin staining (H&E), transmission electron microscopic (TEM) examination and terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL) assays. The anti-inflammatory mechanism of acupuncture was studied by using the expressions of microRNA-146a (miR-146a) mediated nuclear factor-kappa B (NF-κB) signaling pathway-related proteins were detected by immunofluorescence, western blotting, quantitative real-time polymerase chain reaction (PCR) and enzyme-linked immunosorbent assay (ELISA). Results Rats injected by D-galactose (D-gal) revealed apparent skeletal muscle atrophy with significantly reduced cross-sectional area and fiber diameter. In contrast, acupuncture treatment alleviated these hallmarks of skeletal muscle atrophy and mitigated the mitochondrial aberrations and skeletal muscle apoptosis in D-gal rats. In addition, acupuncture also downgraded the overexpression of inflammatory factors in skeletal muscle, influenced miR-146a and the target genes level, and inhibited NF-κB nuclear translation in D-gal rats. Conclusions Acupuncture may ameliorate skeletal muscle atrophy, and its effects may be associated with the control of mitochondrial function regulation and the suppression of inflammation.
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Affiliation(s)
- Jing Jin
- College of Rehabilitation Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou, China
| | - Zhengyu Yang
- College of Rehabilitation Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou, China
| | - Haichao Liu
- College of Rehabilitation Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou, China
| | - Mingling Guo
- The School of Health, Fujian Medical University, Fuzhou, China
| | - Borui Chen
- College of Rehabilitation Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou, China
| | - Haoming Zhu
- College of Rehabilitation Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou, China
| | - Yu Wang
- College of Rehabilitation Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou, China
| | - Jianping Lin
- The School of Health, Fujian Medical University, Fuzhou, China
| | - Shizhong Wang
- The School of Health, Fujian Medical University, Fuzhou, China
| | - Shaoqing Chen
- College of Rehabilitation Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou, China
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Spinler JK, Oezguen N, Runge JK, Luna RA, Karri V, Yang J, Hirschi KD. Dietary impact of a plant-derived microRNA on the gut microbiome. ACTA ACUST UNITED AC 2020; 2. [PMID: 33542959 PMCID: PMC7856875 DOI: 10.1186/s41544-020-00053-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Background: Global estimations of 4 billion people living on plant-based diets signify tremendous diversity in plant consumption and their assorted miRNAs, which presents a challenging model to experimentally address how plant-based miRNAs impact the microbiome. Here we establish baseline gut microbiome composition for a mouse model deficient in the specific mammalian miR-146a shown to alter gut microbiomes. We then asses the effect on the gut microbiome when miR-146a-deficient mice are fed a transgenic plant-based diet expressing the murine-derived miR-146a. Mice deficient in miR-146a were maintained either on a baseline diet until 7 weeks of age (day 0) and then fed either vector or miR-146a-expressing plant-based diets for 21 days. The gut microbiomes of mice were examined by comparing the V4 region of 16S rRNA gene sequences of DNA isolated from fecal samples at days 0 (baseline diet) and 21 (vector or miR-146a expressing plant-based diets). Results: Beta-diversity analysis demonstrated that the transition from baseline chow to a plant-based diet resulted in significant longitudinal shifts in microbial community structure attributable to increased fiber intake. Bipartite network analysis suggests that miR-146a-deficient mice fed a plant diet rich in miR-146a have a microbiome population modestly different than mice fed an isogenic control plant diet deficient in miR-146a. Conclusion: A mouse diet composed of a transgenic plant expressing a mouse miR-146a may fine tune microbial communities but does not appear to have global effects on microbiome structure and composition.
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Affiliation(s)
- Jennifer K Spinler
- Texas Children's Microbiome Center, Department of Pathology, Texas Children's Hospital, Houston, TX, USA.,Department of Pathology & Immunology, Baylor College of Medicine, One Baylor Plaza, 1102 Bates Ave, Houston, TX 77030, USA
| | - Numan Oezguen
- Texas Children's Microbiome Center, Department of Pathology, Texas Children's Hospital, Houston, TX, USA.,Department of Pathology & Immunology, Baylor College of Medicine, One Baylor Plaza, 1102 Bates Ave, Houston, TX 77030, USA
| | - Jessica K Runge
- Texas Children's Microbiome Center, Department of Pathology, Texas Children's Hospital, Houston, TX, USA.,Department of Pathology & Immunology, Baylor College of Medicine, One Baylor Plaza, 1102 Bates Ave, Houston, TX 77030, USA
| | - Ruth Ann Luna
- Texas Children's Microbiome Center, Department of Pathology, Texas Children's Hospital, Houston, TX, USA.,Department of Pathology & Immunology, Baylor College of Medicine, One Baylor Plaza, 1102 Bates Ave, Houston, TX 77030, USA
| | | | - Jian Yang
- Pediatrics-Nutrition, Children's Nutrition Research, Baylor College of Medicine, 1100 Bates Ave, Houston, TX 77030, USA
| | - Kendal D Hirschi
- Pediatrics-Nutrition, Children's Nutrition Research, Baylor College of Medicine, 1100 Bates Ave, Houston, TX 77030, USA
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