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Chen J, Kuang S, Cen J, Zhang Y, Shen Z, Qin W, Huang Q, Wang Z, Gao X, Huang F, Lin Z. Multiomics profiling reveals VDR as a central regulator of mesenchymal stem cell senescence with a known association with osteoporosis after high-fat diet exposure. Int J Oral Sci 2024; 16:41. [PMID: 38777841 PMCID: PMC11111693 DOI: 10.1038/s41368-024-00309-9] [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: 10/20/2023] [Revised: 04/24/2024] [Accepted: 04/28/2024] [Indexed: 05/25/2024] Open
Abstract
The consumption of a high-fat diet (HFD) has been linked to osteoporosis and an increased risk of fragility fractures. However, the specific mechanisms of HFD-induced osteoporosis are not fully understood. Our study shows that exposure to an HFD induces premature senescence in bone marrow mesenchymal stem cells (BMSCs), diminishing their proliferation and osteogenic capability, and thereby contributes to osteoporosis. Transcriptomic and chromatin accessibility analyses revealed the decreased chromatin accessibility of vitamin D receptor (VDR)-binding sequences and decreased VDR signaling in BMSCs from HFD-fed mice, suggesting that VDR is a key regulator of BMSC senescence. Notably, the administration of a VDR activator to HFD-fed mice rescued BMSC senescence and significantly improved osteogenesis, bone mass, and other bone parameters. Mechanistically, VDR activation reduced BMSC senescence by decreasing intracellular reactive oxygen species (ROS) levels and preserving mitochondrial function. Our findings not only elucidate the mechanisms by which an HFD induces BMSC senescence and associated osteoporosis but also offer new insights into treating HFD-induced osteoporosis by targeting the VDR-superoxide dismutase 2 (SOD2)-ROS axis.
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Affiliation(s)
- Jiayao Chen
- Hospital of Stomatology, Sun Yat-sen University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, China
- Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou, China
| | - Shuhong Kuang
- Hospital of Stomatology, Sun Yat-sen University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, China
- Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou, China
| | - Jietao Cen
- Hospital of Stomatology, Sun Yat-sen University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, China
- Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou, China
| | - Yong Zhang
- Hospital of Stomatology, Sun Yat-sen University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, China
- Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou, China
| | - Zongshan Shen
- Hospital of Stomatology, Sun Yat-sen University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, China
- Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou, China
| | - Wei Qin
- Hospital of Stomatology, Sun Yat-sen University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, China
- Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou, China
| | - Qiting Huang
- Hospital of Stomatology, Sun Yat-sen University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, China
- Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou, China
| | - Zifeng Wang
- Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, China
| | - Xianling Gao
- Hospital of Stomatology, Sun Yat-sen University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, China
- Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou, China
| | - Fang Huang
- Hospital of Stomatology, Sun Yat-sen University, Guangzhou, China.
- Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, China.
- Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou, China.
| | - Zhengmei Lin
- Hospital of Stomatology, Sun Yat-sen University, Guangzhou, China.
- Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, China.
- Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou, China.
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Buford M, Lacher S, Slattery M, Levings DC, Postma B, Holian A, Migliaccio C. A mouse model of wildfire smoke-induced health effects: sex differences in acute and sustained effects of inhalation exposures. Inhal Toxicol 2024:1-11. [PMID: 38769076 DOI: 10.1080/08958378.2024.2354398] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Accepted: 05/07/2024] [Indexed: 05/22/2024]
Abstract
Due to climate change, wildfires have increased in intensity and duration. While wildfires threaten lives directly, the smoke has more far-reaching adverse health impacts. During an extreme 2017 wildfire event, residents of Seeley Lake, Montana were exposed to unusually high levels of wood smoke (WS) causing sustained effects on lung function (decreased FEV1/FVC). Objective: The present study utilized an animal model of WS exposure to research cellular and molecular mechanisms of the resulting health effects. Methods: Mice were exposed to inhaled WS utilizing locally harvested wood to recapitulate community exposures. WS was generated at a rate resulting in a 5 mg/m3 PM2.5 exposure for five days. Results: This exposure resulted in a similar 0.28 mg/m2 particle deposition (lung surface area) in mice that was calculated for human exposure. As with the community observations, there was a significant effect on lung function, increased resistance, and decreased compliance, that was more pronounced in males at an extended (2 months) timepoint and males were more affected than females: ex vivo assays illustrated changes to alveolar macrophage functions (increased TNFα secretion and decreased efferocytosis). Female mice had significantly elevated IL-33 levels in lungs, however, pretreatment of male mice with IL-33 resulted in an abrogation of the observed WS effects, suggesting a dose-dependent role of IL-33. Additionally, there were greater immunotoxic effects in male mice. Discussion: These findings replicated the outcomes in humans and suggest that IL-33 is involved in a mechanism of the adverse effects of WS exposures that inform on potential sex differences.
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Affiliation(s)
- Mary Buford
- University of MT, Center for Environmental Health Sciences, Missoula, MT, USA
| | - Sarah Lacher
- Department of Biomedical Sciences, University of MN Medical School, Duluth, MN, USA
| | - Matthew Slattery
- Department of Biomedical Sciences, University of MN Medical School, Duluth, MN, USA
| | - Daniel C Levings
- Department of Biomedical Sciences, University of MN Medical School, Duluth, MN, USA
| | - Britten Postma
- University of MT, Center for Environmental Health Sciences, Missoula, MT, USA
| | - Andrij Holian
- University of MT, Center for Environmental Health Sciences, Missoula, MT, USA
| | - Chris Migliaccio
- University of MT, Center for Environmental Health Sciences, Missoula, MT, USA
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Meydan S, Barros GC, Simões V, Harley L, Cizubu BK, Guydosh NR, Silva GM. The ubiquitin conjugase Rad6 mediates ribosome pausing during oxidative stress. Cell Rep 2023; 42:113359. [PMID: 37917585 PMCID: PMC10755677 DOI: 10.1016/j.celrep.2023.113359] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Revised: 07/26/2023] [Accepted: 10/13/2023] [Indexed: 11/04/2023] Open
Abstract
Oxidative stress causes K63-linked ubiquitination of ribosomes by the E2 ubiquitin conjugase Rad6. How Rad6-mediated ubiquitination of ribosomes affects translation, however, is unclear. We therefore perform Ribo-seq and Disome-seq in Saccharomyces cerevisiae and show that oxidative stress causes ribosome pausing at specific amino acid motifs, which also leads to ribosome collisions. However, these redox-pausing signatures are lost in the absence of Rad6 and do not depend on the ribosome-associated quality control (RQC) pathway. We also show that Rad6 is needed to inhibit overall translation in response to oxidative stress and that its deletion leads to increased expression of antioxidant genes. Finally, we observe that the lack of Rad6 leads to changes during translation that affect activation of the integrated stress response (ISR) pathway. Our results provide a high-resolution picture of the gene expression changes during oxidative stress and unravel an additional stress response pathway affecting translation elongation.
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Affiliation(s)
- Sezen Meydan
- National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD 20892, USA; Postdoctoral Research Associate Training Fellowship, National Institute of General Medical Sciences, National Institutes of Health, Bethesda, MD 20982, USA
| | | | - Vanessa Simões
- Department of Biology, Duke University, Durham, NC 27708, USA
| | - Lana Harley
- Department of Biology, Duke University, Durham, NC 27708, USA
| | | | - Nicholas R Guydosh
- National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD 20892, USA.
| | - Gustavo M Silva
- Department of Biology, Duke University, Durham, NC 27708, USA.
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Zhang Q, Li Q, Wang Y, Zhang Y, Peng R, Wang Z, Zhu B, Xu L, Gao X, Chen Y, Gao H, Hu J, Qian C, Ma M, Duan R, Li J, Zhang L. Characterization of Chromatin Accessibility in Fetal Bovine Chondrocytes. Animals (Basel) 2023; 13:1875. [PMID: 37889831 PMCID: PMC10251841 DOI: 10.3390/ani13111875] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Revised: 05/28/2023] [Accepted: 05/29/2023] [Indexed: 10/29/2023] Open
Abstract
Despite significant advances of the bovine epigenome investigation, new evidence for the epigenetic basis of fetal cartilage development remains lacking. In this study, the chondrocytes were isolated from long bone tissues of bovine fetuses at 90 days. The Assay for Transposase-Accessible Chromatin with high throughput sequencing (ATAC-seq) and transcriptome sequencing (RNA-seq) were used to characterize gene expression and chromatin accessibility profile in bovine chondrocytes. A total of 9686 open chromatin regions in bovine fetal chondrocytes were identified and 45% of the peaks were enriched in the promoter regions. Then, all peaks were annotated to the nearest gene for Gene Ontology (GO) and Kyoto Encylopaedia of Genes and Genomes (KEGG) analysis. Growth and development-related processes such as amide biosynthesis process (GO: 0043604) and translation regulation (GO: 006417) were enriched in the GO analysis. The KEGG analysis enriched endoplasmic reticulum protein processing signal pathway, TGF-β signaling pathway and cell cycle pathway, which are closely related to protein synthesis and processing during cell proliferation. Active transcription factors (TFs) were enriched by ATAC-seq, and were fully verified with gene expression levels obtained by RNA-seq. Among the top50 TFs from footprint analysis, known or potential cartilage development-related transcription factors FOS, FOSL2 and NFY were found. Overall, our data provide a theoretical basis for further determining the regulatory mechanism of cartilage development in bovine.
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Affiliation(s)
- Qi Zhang
- Key Laboratory of Animal (Poultry) Genetics Breeding and Reproduction, Ministry of Agriculture and Rural Affairs, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China; (Q.Z.); (Q.L.); (Y.W.); (Y.Z.); (R.P.); (Z.W.); (B.Z.); (L.X.); (X.G.); (Y.C.); (H.G.)
| | - Qian Li
- Key Laboratory of Animal (Poultry) Genetics Breeding and Reproduction, Ministry of Agriculture and Rural Affairs, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China; (Q.Z.); (Q.L.); (Y.W.); (Y.Z.); (R.P.); (Z.W.); (B.Z.); (L.X.); (X.G.); (Y.C.); (H.G.)
| | - Yahui Wang
- Key Laboratory of Animal (Poultry) Genetics Breeding and Reproduction, Ministry of Agriculture and Rural Affairs, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China; (Q.Z.); (Q.L.); (Y.W.); (Y.Z.); (R.P.); (Z.W.); (B.Z.); (L.X.); (X.G.); (Y.C.); (H.G.)
| | - Yapeng Zhang
- Key Laboratory of Animal (Poultry) Genetics Breeding and Reproduction, Ministry of Agriculture and Rural Affairs, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China; (Q.Z.); (Q.L.); (Y.W.); (Y.Z.); (R.P.); (Z.W.); (B.Z.); (L.X.); (X.G.); (Y.C.); (H.G.)
| | - Ruiqi Peng
- Key Laboratory of Animal (Poultry) Genetics Breeding and Reproduction, Ministry of Agriculture and Rural Affairs, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China; (Q.Z.); (Q.L.); (Y.W.); (Y.Z.); (R.P.); (Z.W.); (B.Z.); (L.X.); (X.G.); (Y.C.); (H.G.)
| | - Zezhao Wang
- Key Laboratory of Animal (Poultry) Genetics Breeding and Reproduction, Ministry of Agriculture and Rural Affairs, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China; (Q.Z.); (Q.L.); (Y.W.); (Y.Z.); (R.P.); (Z.W.); (B.Z.); (L.X.); (X.G.); (Y.C.); (H.G.)
| | - Bo Zhu
- Key Laboratory of Animal (Poultry) Genetics Breeding and Reproduction, Ministry of Agriculture and Rural Affairs, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China; (Q.Z.); (Q.L.); (Y.W.); (Y.Z.); (R.P.); (Z.W.); (B.Z.); (L.X.); (X.G.); (Y.C.); (H.G.)
| | - Lingyang Xu
- Key Laboratory of Animal (Poultry) Genetics Breeding and Reproduction, Ministry of Agriculture and Rural Affairs, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China; (Q.Z.); (Q.L.); (Y.W.); (Y.Z.); (R.P.); (Z.W.); (B.Z.); (L.X.); (X.G.); (Y.C.); (H.G.)
| | - Xue Gao
- Key Laboratory of Animal (Poultry) Genetics Breeding and Reproduction, Ministry of Agriculture and Rural Affairs, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China; (Q.Z.); (Q.L.); (Y.W.); (Y.Z.); (R.P.); (Z.W.); (B.Z.); (L.X.); (X.G.); (Y.C.); (H.G.)
| | - Yan Chen
- Key Laboratory of Animal (Poultry) Genetics Breeding and Reproduction, Ministry of Agriculture and Rural Affairs, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China; (Q.Z.); (Q.L.); (Y.W.); (Y.Z.); (R.P.); (Z.W.); (B.Z.); (L.X.); (X.G.); (Y.C.); (H.G.)
| | - Huijiang Gao
- Key Laboratory of Animal (Poultry) Genetics Breeding and Reproduction, Ministry of Agriculture and Rural Affairs, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China; (Q.Z.); (Q.L.); (Y.W.); (Y.Z.); (R.P.); (Z.W.); (B.Z.); (L.X.); (X.G.); (Y.C.); (H.G.)
| | - Junwei Hu
- Academy of Pingliang Red Cattle, 492 South Ring Road, Kongtong District, Pingliang 744000, China; (J.H.); (C.Q.); (M.M.); (R.D.)
| | - Cong Qian
- Academy of Pingliang Red Cattle, 492 South Ring Road, Kongtong District, Pingliang 744000, China; (J.H.); (C.Q.); (M.M.); (R.D.)
| | - Minghao Ma
- Academy of Pingliang Red Cattle, 492 South Ring Road, Kongtong District, Pingliang 744000, China; (J.H.); (C.Q.); (M.M.); (R.D.)
| | - Rui Duan
- Academy of Pingliang Red Cattle, 492 South Ring Road, Kongtong District, Pingliang 744000, China; (J.H.); (C.Q.); (M.M.); (R.D.)
| | - Junya Li
- Key Laboratory of Animal (Poultry) Genetics Breeding and Reproduction, Ministry of Agriculture and Rural Affairs, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China; (Q.Z.); (Q.L.); (Y.W.); (Y.Z.); (R.P.); (Z.W.); (B.Z.); (L.X.); (X.G.); (Y.C.); (H.G.)
| | - Lupei Zhang
- Key Laboratory of Animal (Poultry) Genetics Breeding and Reproduction, Ministry of Agriculture and Rural Affairs, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China; (Q.Z.); (Q.L.); (Y.W.); (Y.Z.); (R.P.); (Z.W.); (B.Z.); (L.X.); (X.G.); (Y.C.); (H.G.)
- Academy of Pingliang Red Cattle, 492 South Ring Road, Kongtong District, Pingliang 744000, China; (J.H.); (C.Q.); (M.M.); (R.D.)
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Lacher SE, Skon-Hegg C, Ruis BL, Krznarich J, Slattery M. An antioxidant response element regulates the HIF1α axis in breast cancer cells. Free Radic Biol Med 2023; 204:243-251. [PMID: 37179033 DOI: 10.1016/j.freeradbiomed.2023.05.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/19/2023] [Revised: 04/28/2023] [Accepted: 05/02/2023] [Indexed: 05/15/2023]
Abstract
The redox sensitive transcription factor NRF2 is a central regulator of the transcriptional response to reactive oxygen species (ROS). NRF2 is widely recognized for its ROS-responsive upregulation of antioxidant genes that are essential for mitigating the damaging effects of oxidative stress. However, multiple genome-wide approaches have suggested that NRF2's regulatory reach extends well beyond the canonical antioxidant genes, with the potential to regulate many noncanonical target genes. Recent work from our lab and others suggests HIF1A, which encodes the hypoxia-responsive transcription factor HIF1α, is one such noncanonical NRF2 target. These studies found that NRF2 activity is associated with high HIF1A expression in multiple cellular contexts, HIF1A expression is partially dependent on NRF2, and there is a putative NRF2 binding site (antioxidant response element, or ARE) approximately 30 kilobases upstream of HIF1A. These findings all support a model in which HIF1A is a direct target of NRF2, but did not confirm the functional importance of the upstream ARE in HIF1A expression. Here we use CRISPR/Cas9 genome editing to mutate this ARE in its genomic context and test the impact on HIF1A expression. We find that mutation of this ARE in a breast cancer cell line (MDA-MB-231) eliminates NRF2 binding and decreases HIF1A expression at the transcript and protein levels, and disrupts HIF1α target genes as well as phenotypes driven by these HIF1α targets. Taken together, these results indicate that this NRF2 targeted upstream ARE plays an important role in the expression of HIF1A and activity of the HIF1α axis in MDA-MB-231 cells.
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Affiliation(s)
- Sarah E Lacher
- Department of Biomedical Sciences, University of Minnesota Medical School, Duluth, MN, 55812, USA.
| | - Cara Skon-Hegg
- Whiteside Institute for Clinical Research, St. Luke's Hospital, University of Minnesota Medical School, Duluth, MN, 55812, USA
| | - Brian L Ruis
- Masonic Cancer Center, University of Minnesota Medical School, Minneapolis, MN, 55455, USA
| | - Jennifer Krznarich
- Department of Biomedical Sciences, University of Minnesota Medical School, Duluth, MN, 55812, USA
| | - Matthew Slattery
- Department of Biomedical Sciences, University of Minnesota Medical School, Duluth, MN, 55812, USA.
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Endoplasmic Reticulum Stress and Reactive Oxygen Species in Plants. Antioxidants (Basel) 2022; 11:antiox11071240. [PMID: 35883731 PMCID: PMC9311536 DOI: 10.3390/antiox11071240] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Revised: 06/16/2022] [Accepted: 06/22/2022] [Indexed: 12/25/2022] Open
Abstract
The endoplasmic reticulum (ER) is a key compartment responsible for protein processing and folding, and it also participates in many signal transduction and metabolic processes. Reactive oxygen species (ROS) are important signaling messengers involved in the redox equilibrium and stress response. A number of abiotic and biotic stresses can trigger the accumulation of unfolded or misfolded proteins and lead to ER stress. In recent years, a number of studies have reported that redox metabolism and ROS are closely related to ER stress. ER stress can benefit ROS generation and even cause oxidative burden in plants, finally leading to oxidative stress depending on the degree of ER stress. Moreover, ER stress activates nicotinamide adenine dinucleotide phosphate (NADPH) oxidase-mediated ROS signaling, increases antioxidant defense mechanisms, and alters the glutathione (GSH) redox state. Meanwhile, the accumulation of ROS plays a special role in inducing the ER stress response. Given these factors, plants have evolved a series of complex regulatory mechanisms to interact with ROS in response to ER stress. In this review, we summarize the perceptions and responses of plant ER stress and oxidative protein folding in the ER. In addition, we analyze the production and signaling of ROS under ER stress in detail in order to provide a theoretical basis for reducing ER stress to improve the crop survival rate in agricultural applications.
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