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Zi-Yi Z, Qin Q, Fei Z, Cun-Yu C, Lin T. Nesprin proteins: bridging nuclear envelope dynamics to muscular dysfunction. Cell Commun Signal 2024; 22:208. [PMID: 38566066 PMCID: PMC10986154 DOI: 10.1186/s12964-024-01593-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2024] [Accepted: 03/24/2024] [Indexed: 04/04/2024] Open
Abstract
This review presents a comprehensive exploration of the pivotal role played by the Linker of Nucleoskeleton and Cytoskeleton (LINC) complex, with a particular focus on Nesprin proteins, in cellular mechanics and the pathogenesis of muscular diseases. Distinguishing itself from prior works, the analysis delves deeply into the intricate interplay of the LINC complex, emphasizing its indispensable contribution to maintaining cellular structural integrity, especially in mechanically sensitive tissues such as cardiac and striated muscles. Additionally, the significant association between mutations in Nesprin proteins and the onset of Dilated Cardiomyopathy (DCM) and Emery-Dreifuss Muscular Dystrophy (EDMD) is highlighted, underscoring their pivotal role in disease pathogenesis. Through a comprehensive examination of DCM and EDMD cases, the review elucidates the disruptions in the LINC complex, nuclear morphology alterations, and muscular developmental disorders, thus emphasizing the essential function of an intact LINC complex in preserving muscle physiological functions. Moreover, the review provides novel insights into the implications of Nesprin mutations for cellular dynamics in the pathogenesis of muscular diseases, particularly in maintaining cardiac structural and functional integrity. Furthermore, advanced therapeutic strategies, including rectifying Nesprin gene mutations, controlling Nesprin protein expression, enhancing LINC complex functionality, and augmenting cardiac muscle cell function are proposed. By shedding light on the intricate molecular mechanisms underlying nuclear-cytoskeletal interactions, the review lays the groundwork for future research and therapeutic interventions aimed at addressing genetic muscle disorders.
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Affiliation(s)
- Zhou Zi-Yi
- Department of Cardiology, Yichang Central People's Hospital, Yichang, 443003, Hubei, People's Republic of China
- School of Basic Medicine, China Three Gorges University, Yichang, 443000, Hubei, People's Republic of China
| | - Qin Qin
- Department of Cardiology, Yichang Central People's Hospital, Yichang, 443003, Hubei, People's Republic of China
- School of Basic Medicine, China Three Gorges University, Yichang, 443000, Hubei, People's Republic of China
| | - Zhou Fei
- Department of Cardiology, Yichang Central People's Hospital, Yichang, 443003, Hubei, People's Republic of China
| | - Cao Cun-Yu
- School of Basic Medicine, China Three Gorges University, Yichang, 443000, Hubei, People's Republic of China
- College of Basic Medical Sciences, Hubei Key Laboratory of Tumor Microencironment and immunotherapy, China Three Gorges University, Yichang, 443000, Hubei, People's Republic of China
| | - Teng Lin
- Department of Cardiology, Yichang Central People's Hospital, Yichang, 443003, Hubei, People's Republic of China.
- King's College London British Heart Foundation Centre of Research Excellence, School of Cardiovascular and Metabolic Medicine & Sciences, London, SE5 9NU, UK.
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Shen Y, Zheng LL, Fang CY, Xu YY, Wang C, Li JT, Lei MZ, Yin M, Lu HJ, Lei QY, Qu J. ABHD7-mediated depalmitoylation of lamin A promotes myoblast differentiation. Cell Rep 2024; 43:113720. [PMID: 38308845 DOI: 10.1016/j.celrep.2024.113720] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2023] [Revised: 07/04/2023] [Accepted: 01/12/2024] [Indexed: 02/05/2024] Open
Abstract
LMNA gene mutation can cause muscular dystrophy, and post-translational modification plays a critical role in regulating its function. Here, we identify that lamin A is palmitoylated at cysteine 522, 588, and 591 residues, which are reversely catalyzed by palmitoyltransferase zinc finger DHHC-type palmitoyltransferase 5 (ZDHHC5) and depalmitoylase α/β hydrolase domain 7 (ABHD7). Furthermore, the metabolite lactate promotes palmitoylation of lamin A by inhibiting the interaction between it and ABHD7. Interestingly, low-level palmitoylation of lamin A promotes, whereas high-level palmitoylation of lamin A inhibits, murine myoblast differentiation. Together, these observations suggest that ABHD7-mediated depalmitoylation of lamin A controls myoblast differentiation.
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Affiliation(s)
- Yuan Shen
- Fudan University Shanghai Cancer Center & Institutes of Biomedical Sciences, Cancer Institutes, Key Laboratory of Breast Cancer in Shanghai, Shanghai Key Laboratory of Radiation Oncology, The Shanghai Key Laboratory of Medical Epigenetics, Shanghai Medical College, Fudan University, Shanghai 200032, China; Department of Oncology, Shanghai Medical College, Fudan University, Shanghai 200032, China
| | - Liang-Liang Zheng
- Fudan University Shanghai Cancer Center & Institutes of Biomedical Sciences, Cancer Institutes, Key Laboratory of Breast Cancer in Shanghai, Shanghai Key Laboratory of Radiation Oncology, The Shanghai Key Laboratory of Medical Epigenetics, Shanghai Medical College, Fudan University, Shanghai 200032, China; Department of Oncology, Shanghai Medical College, Fudan University, Shanghai 200032, China
| | - Cai-Yun Fang
- Department of Chemistry, Fudan University, Shanghai 200438, China
| | - Yao-Yao Xu
- Fudan University Shanghai Cancer Center & Institutes of Biomedical Sciences, Cancer Institutes, Key Laboratory of Breast Cancer in Shanghai, Shanghai Key Laboratory of Radiation Oncology, The Shanghai Key Laboratory of Medical Epigenetics, Shanghai Medical College, Fudan University, Shanghai 200032, China
| | - Chao Wang
- Fudan University Shanghai Cancer Center & Institutes of Biomedical Sciences, Cancer Institutes, Key Laboratory of Breast Cancer in Shanghai, Shanghai Key Laboratory of Radiation Oncology, The Shanghai Key Laboratory of Medical Epigenetics, Shanghai Medical College, Fudan University, Shanghai 200032, China; Department of Oncology, Shanghai Medical College, Fudan University, Shanghai 200032, China
| | - Jin-Tao Li
- Fudan University Shanghai Cancer Center & Institutes of Biomedical Sciences, Cancer Institutes, Key Laboratory of Breast Cancer in Shanghai, Shanghai Key Laboratory of Radiation Oncology, The Shanghai Key Laboratory of Medical Epigenetics, Shanghai Medical College, Fudan University, Shanghai 200032, China; Department of Oncology, Shanghai Medical College, Fudan University, Shanghai 200032, China
| | - Ming-Zhu Lei
- Fudan University Shanghai Cancer Center & Institutes of Biomedical Sciences, Cancer Institutes, Key Laboratory of Breast Cancer in Shanghai, Shanghai Key Laboratory of Radiation Oncology, The Shanghai Key Laboratory of Medical Epigenetics, Shanghai Medical College, Fudan University, Shanghai 200032, China; Department of Oncology, Shanghai Medical College, Fudan University, Shanghai 200032, China
| | - Miao Yin
- Fudan University Shanghai Cancer Center & Institutes of Biomedical Sciences, Cancer Institutes, Key Laboratory of Breast Cancer in Shanghai, Shanghai Key Laboratory of Radiation Oncology, The Shanghai Key Laboratory of Medical Epigenetics, Shanghai Medical College, Fudan University, Shanghai 200032, China; Department of Oncology, Shanghai Medical College, Fudan University, Shanghai 200032, China
| | - Hao-Jie Lu
- Fudan University Shanghai Cancer Center & Institutes of Biomedical Sciences, Cancer Institutes, Key Laboratory of Breast Cancer in Shanghai, Shanghai Key Laboratory of Radiation Oncology, The Shanghai Key Laboratory of Medical Epigenetics, Shanghai Medical College, Fudan University, Shanghai 200032, China; NHC Key Laboratory of Glycoconjugates Research, Fudan University, Shanghai 200032, China; Department of Chemistry, Fudan University, Shanghai 200438, China.
| | - Qun-Ying Lei
- Fudan University Shanghai Cancer Center & Institutes of Biomedical Sciences, Cancer Institutes, Key Laboratory of Breast Cancer in Shanghai, Shanghai Key Laboratory of Radiation Oncology, The Shanghai Key Laboratory of Medical Epigenetics, Shanghai Medical College, Fudan University, Shanghai 200032, China; Department of Oncology, Shanghai Medical College, Fudan University, Shanghai 200032, China; State Key Laboratory of Medical Neurobiology, Fudan University, Shanghai 200032, China; New Cornerstone Science Laboratory, Fudan University, Shanghai 200032, China.
| | - Jia Qu
- Fudan University Shanghai Cancer Center & Institutes of Biomedical Sciences, Cancer Institutes, Key Laboratory of Breast Cancer in Shanghai, Shanghai Key Laboratory of Radiation Oncology, The Shanghai Key Laboratory of Medical Epigenetics, Shanghai Medical College, Fudan University, Shanghai 200032, China; Department of Oncology, Shanghai Medical College, Fudan University, Shanghai 200032, China.
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Upadhyay KK, Du X, Chen Y, Speliotes EK, Brady GF. LMNA R644C associates with hepatic steatosis in a large cohort and increases cellular lipid droplet accumulation in vitro. MEDRXIV : THE PREPRINT SERVER FOR HEALTH SCIENCES 2023:2023.12.20.23300290. [PMID: 38196593 PMCID: PMC10775342 DOI: 10.1101/2023.12.20.23300290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2024]
Abstract
The R644C variant of lamin A is controversial, as it has been linked to multiple phenotypes in familial studies, but has also been identified in apparently healthy volunteers. Here we present data from a large midwestern US cohort showing that this variant associates genetically with hepatic steatosis, and with related traits in additional publicly available datasets, while in vitro testing demonstrated that this variant increased cellular lipid droplet accumulation. Taken together, these data support this LMNA variant's potential pathogenicity in lipodystrophy and metabolic liver disease.
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Affiliation(s)
- Kapil K. Upadhyay
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan, USA
| | - Xiaomeng Du
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan, USA
| | - Yanhua Chen
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan, USA
| | - Elizabeth K. Speliotes
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan, USA
- Department of Computational Medicine and Bioinformatics, University of Michigan, Ann Arbor, Michigan, USA
| | - Graham F. Brady
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan, USA
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Upadhyay KK, Du X, Chen Y, Buscher B, Chen VL, Oliveri A, Zhao R, Speliotes EK, Brady GF. A common variant that alters SUN1 degradation associates with hepatic steatosis and metabolic traits in multiple cohorts. J Hepatol 2023; 79:1226-1235. [PMID: 37567366 PMCID: PMC10618955 DOI: 10.1016/j.jhep.2023.07.036] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Revised: 07/03/2023] [Accepted: 07/13/2023] [Indexed: 08/13/2023]
Abstract
BACKGROUND & AIMS Non-alcoholic fatty liver disease (NAFLD), and its progressive form steatohepatitis (NASH), represent a genetically and phenotypically diverse entity for which there is no approved therapy, making it imperative to define the spectrum of pathways contributing to its pathogenesis. Rare variants in genes encoding nuclear envelope proteins cause lipodystrophy with early-onset NAFLD/NASH; we hypothesized that common variants in nuclear envelope-related genes might also contribute to hepatic steatosis and NAFLD. METHODS Using hepatic steatosis as the outcome of interest, we performed an association meta-analysis of nuclear envelope-related coding variants in three large discovery cohorts (N >120,000 participants), followed by phenotype association studies in large validation cohorts (N >600,000) and functional testing of the top steatosis-associated variant in cell culture. RESULTS A common protein-coding variant, rs6461378 (SUN1 H118Y), was the top steatosis-associated variant in our association meta-analysis (p <0.001). In ancestrally distinct validation cohorts, rs6461378 associated with histologic NAFLD and with NAFLD-related metabolic traits including increased serum fatty acids, type 2 diabetes, hypertension, cardiovascular disease, and decreased HDL. SUN1 H118Y was subject to increased proteasomal degradation relative to wild-type SUN1 in cells, and SUN1 H118Y-expressing cells exhibited insulin resistance and increased lipid accumulation. CONCLUSIONS Collectively, these data support a potential causal role for the common SUN1 variant rs6461378 in NAFLD and metabolic disease. IMPACT AND IMPLICATIONS Non-alcoholic fatty liver disease (NAFLD), with an estimated global prevalence of nearly 30%, is a growing cause of morbidity and mortality for which there is no approved pharmacologic therapy. Our data provide a rationale for broadening current concepts of NAFLD genetics and pathophysiology to include the nuclear envelope, and particularly Sad1 and UNC84 domain containing 1 (SUN1), as novel contributors to this common liver disease. Furthermore, if future studies confirm causality of the common SUN1 H118Y variant, it has the potential to become a broadly relevant therapeutic target in NAFLD and metabolic disease.
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Affiliation(s)
- Kapil K Upadhyay
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, Ann Arbor, Michigan, USA
| | - Xiaomeng Du
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, Ann Arbor, Michigan, USA
| | - Yanhua Chen
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, Ann Arbor, Michigan, USA
| | - Brandon Buscher
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, Ann Arbor, Michigan, USA
| | - Vincent L Chen
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, Ann Arbor, Michigan, USA
| | - Antonino Oliveri
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, Ann Arbor, Michigan, USA
| | - Raymond Zhao
- University of Michigan Medical School, Ann Arbor, Michigan, USA
| | - Elizabeth K Speliotes
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, Ann Arbor, Michigan, USA; Department of Computational Medicine and Bioinformatics, University of Michigan, Ann Arbor, Michigan, USA
| | - Graham F Brady
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, Ann Arbor, Michigan, USA.
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Upadhyay KK, Choi EYK, Foisner R, Omary MB, Brady GF. Hepatocyte-specific loss of LAP2α protects against diet-induced hepatic steatosis, steatohepatitis, and fibrosis in male mice. Am J Physiol Gastrointest Liver Physiol 2023; 325:G184-G195. [PMID: 37366543 PMCID: PMC10396226 DOI: 10.1152/ajpgi.00214.2022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Revised: 05/24/2023] [Accepted: 06/18/2023] [Indexed: 06/28/2023]
Abstract
There is increasing evidence for the importance of the nuclear envelope in lipid metabolism, nonalcoholic fatty liver disease (NAFLD), and nonalcoholic steatohepatitis (NASH). Human mutations in LMNA, encoding A-type nuclear lamins, cause early-onset insulin resistance and NASH, while hepatocyte-specific deletion of Lmna predisposes to NASH with fibrosis in male mice. Given that variants in the gene encoding LAP2α, a nuclear protein that regulates lamin A/C, were previously identified in patients with NAFLD, we sought to determine the role of LAP2α in NAFLD using a mouse genetic model. Hepatocyte-specific Lap2α-knockout (Lap2α(ΔHep)) mice and littermate controls were fed normal chow or high-fat diet (HFD) for 8 wk or 6 mo. Unexpectedly, male Lap2α(ΔHep) mice showed no increase in hepatic steatosis or NASH compared with controls. Rather, Lap2α(ΔHep) mice demonstrated reduced hepatic steatosis, with decreased NASH and fibrosis after long-term HFD. Accordingly, pro-steatotic genes including Cidea, Mogat1, and Cd36 were downregulated in Lap2α(ΔHep) mice, along with concomitant decreases in expression of pro-inflammatory and pro-fibrotic genes. These data indicate that hepatocyte-specific Lap2α deletion protects against hepatic steatosis and NASH in mice and raise the possibility that LAP2α could become a potential therapeutic target in human NASH.NEW & NOTEWORTHY The nuclear envelope and lamina regulate lipid metabolism and susceptibility to nonalcoholic steatohepatitis (NASH), but the role of the nuclear lamin-binding protein LAP2α in NASH has not been explored. Our data demonstrate that hepatocyte-specific loss of LAP2α protects against diet-induced hepatic steatosis, NASH, and fibrosis in male mice, with downregulation of pro-steatotic, pro-inflammatory, and pro-fibrotic lamin-regulated genes. These findings suggest that targeting LAP2α could have future potential as a novel therapeutic avenue in NASH.
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Affiliation(s)
- Kapil K Upadhyay
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan, United States
| | - Eun-Young K Choi
- Department of Pathology, University of Michigan, Ann Arbor, Michigan, United States
| | - Roland Foisner
- Max Perutz Labs, Medical University of Vienna, Vienna Biocenter Campus, Vienna, Austria
| | - M Bishr Omary
- Robert Wood Johnson Medical School and the Center for Advanced Biotechnology and Medicine, Rutgers University, Piscataway, New Jersey, United States
| | - Graham F Brady
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan, United States
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Nucleophagic Degradation of Progerin Ameliorates Defenestration in Liver Sinusoidal Endothelium Due to SIRT1-Mediated Deacetylation of Nuclear LC3. Cells 2022; 11:cells11233918. [PMID: 36497176 PMCID: PMC9738635 DOI: 10.3390/cells11233918] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Revised: 11/24/2022] [Accepted: 11/30/2022] [Indexed: 12/12/2022] Open
Abstract
Progerin, a permanently farnesylated prelamin A protein in cell nuclei, is potentially implicated in the defenestration of liver sinusoidal endothelial cells (LSECs) and liver fibrogenesis. Autophagy regulates the degradation of nuclear components, called nucleophagy, in response to damage. However, little is known about the role of nucleophagy in LSEC defenestration. Herein, we aim to dissect the underlying mechanism of progerin and nucleophagy in LSEC phenotype. We found an abnormal accumulation of progerin and a loss of SIRT1 in the nucleus of intrahepatic cells in human fibrotic liver tissue. In vivo, nuclear progerin abnormally accumulated in defenestrated LSECs, along with a depletion of SIRT1 and Cav-1 during liver fibrogenesis, whereas these effects were reversed by the overexpression of SIRT1 with the adenovirus vector. In vitro, H2O2 induced the excessive accumulation of progeirn, with the depletion of Lamin B1 and Cav-1 to aggravate LSEC defenestration. NAC and mito-TEMPO, classical antioxidants, inhibited NOX2- and NOX4-dependent oxidative stress to improve the depletion of Lamin B1 and Cav-1 and promoted progerin-related nucleophagy, leading to a reverse in H2O2-induced LSEC defenestration. However, rapamycin aggravated the H2O2-induced depletion of Lamin B1 and Cav-1 due to excessive autophagy, despite promoting progerin nucleophagic degradation. In addition, overexpressing SIRT1 with the adenovirus vector inhibited oxidative stress to rescue the production of Lamin B1 and Cav-1. Moreover, the SIRT1-mediated deacetylation of nuclear LC3 promoted progerin nucleophagic degradation and subsequently inhibited the degradation of Lamin B1 and Cav-1, as well as improved F-actin remodeling, contributing to maintaining LSEC fenestrae. Hence, our findings indicate a new strategy for reversing LSEC defenestration by promoting progerin clearance via the SIRT1-mediated deacetylation of nuclear LC3.
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A Lamin Family-Based Signature Predicts Prognosis and Immunotherapy Response in Hepatocellular Carcinoma. J Immunol Res 2022; 2022:4983532. [DOI: 10.1155/2022/4983532] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Revised: 10/04/2022] [Accepted: 10/19/2022] [Indexed: 11/12/2022] Open
Abstract
Background. Lamin family members play crucial roles in promoting oncogenesis and cancer development. The values of lamin family in predicting prognosis and immunotherapy response remain largely unclarified. Our research is aimed at comprehensively estimating the clinical significance of lamin family in hepatocellular carcinoma and constructing a novel lamin family-based signature to predict prognosis and guide the precise immunotherapy. Methods. The expression features and prognostic value of LMNA, LMNB1, and LMNB2 were explored in the TCGA and GEO databases. The biological functions of LMNB1 and LMNB2 were validated by in vitro assays. A lamin family-based signature was built using the TCGA training set. The TCGA test set, entire TCGA set, and GSE14520 set were used to validate its predictive power. Univariate and multivariate analyses were performed to evaluate the independence of the lamin family-based signature from other clinicopathological characteristics. A nomogram was constructed using the lamin family-based signature and TNM stage. The associations of this signature with molecular pathways, clinical characteristics, immune cell infiltration, and immunotherapy response were analyzed. Results. Lamin family members were upregulated in HCC. Upregulation of LMNB1 and LMNB2 promoted HCC proliferation, migration, and invasion. The predictive signature was initially established based on LMNB1 and LMNB2 which could effectively identify differences in overall survival, immune cell infiltration, and clinicopathological characteristics of high- and low-risk patients. The nomogram showed high prognostic predictive accuracy. Importantly, the lamin family-based signature was correlated with immune suppression and expression of immune checkpoint molecules. Conclusions. The lamin family-based signature is a robust biomarker to predict overall survival and immunotherapy response in HCC. High-risk score patients have a poorer overall survival and might be more sensitive to immunotherapy. This signature may contribute to improving individualized prognosis prediction and precision immunotherapy for HCC patients.
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Stenvall CGA, Nyström JH, Butler-Hallissey C, Jansson T, Heikkilä TRH, Adam SA, Foisner R, Goldman RD, Ridge KM, Toivola DM. Cytoplasmic keratins couple with and maintain nuclear envelope integrity in colonic epithelial cells. Mol Biol Cell 2022; 33:ar121. [PMID: 36001365 PMCID: PMC9634972 DOI: 10.1091/mbc.e20-06-0387] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
Keratin intermediate filaments convey mechanical stability and protection against stress to epithelial cells. Keratins are essential for colon health, as seen in keratin 8 knockout (K8-/-) mice exhibiting a colitis phenotype. We hypothesized that keratins support the nuclear envelope and lamina in colonocytes. K8-/- colonocytes in vivo exhibit significantly decreased levels of lamins A/C, B1, and B2 in a colon-specific and cell-intrinsic manner. CRISPR/Cas9- or siRNA-mediated K8 knockdown in Caco-2 cells similarly decreased lamin levels, which recovered after reexpression of K8 following siRNA treatment. Nuclear area was not decreased, and roundness was only marginally increased in cells without K8. Down-regulation of K8 in adult K8flox/flox;Villin-CreERt2 mice following tamoxifen administration significantly decreased lamin levels at day 4 when K8 levels had reduced to 40%. K8 loss also led to reduced levels of plectin, LINC complex, and lamin-associated proteins. While keratins were not seen in the nucleoplasm without or with leptomycin B treatment, keratins were found intimately located at the nuclear envelope and complexed with SUN2 and lamin A. Furthermore, K8 loss in Caco-2 cells compromised nuclear membrane integrity basally and after shear stress. In conclusion, colonocyte K8 helps maintain nuclear envelope and lamina composition and contributes to nuclear integrity.
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Affiliation(s)
| | - Joel H. Nyström
- Cell Biology, Biosciences, Faculty of Science and Engineering, Åbo Akademi University
| | - Ciarán Butler-Hallissey
- Cell Biology, Biosciences, Faculty of Science and Engineering, Åbo Akademi University,Turku Bioscience Centre, University of Turku, and Åbo Akademi University, and,Aix Marseille Université, CNRS, INP UMR7051, NeuroCyto, 13005 Marseille, France
| | - Theresia Jansson
- Cell Biology, Biosciences, Faculty of Science and Engineering, Åbo Akademi University
| | - Taina R. H. Heikkilä
- Cell Biology, Biosciences, Faculty of Science and Engineering, Åbo Akademi University
| | | | - Roland Foisner
- Max Perutz Labs, Medical University of Vienna, Vienna Biocenter Campus, 1030 Vienna, Austria
| | | | - Karen M. Ridge
- Department of Cell and Developmental Biology and,Pulmonary and Critical Care Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611
| | - Diana M. Toivola
- Cell Biology, Biosciences, Faculty of Science and Engineering, Åbo Akademi University,InFLAMES Research Flagship Center, Åbo Akademi University, 20500 Turku, Finland,Turku Center for Disease Modeling, University of Turku, 20520 Turku, Finland,*Address correspondence to: Diana M. Toivola ()
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Aljabban J, Rohr M, Syed S, Khorfan K, Borkowski V, Aljabban H, Segal M, Mukhtar M, Mohammed M, Panahiazar M, Hadley D, Spengler R, Spengler E. Transcriptome changes in stages of non-alcoholic fatty liver disease. World J Hepatol 2022; 14:1382-1397. [PMID: 36158924 PMCID: PMC9376779 DOI: 10.4254/wjh.v14.i7.1382] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Revised: 04/29/2022] [Accepted: 06/17/2022] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Non-alcoholic fatty liver disease (NAFLD) is the most common chronic liver disease in the United States and globally. The currently understood model of pathogenesis consists of a ‘multiple hit’ hypothesis in which environmental and genetic factors contribute to hepatic inflammation and injury.
AIM To examine the genetic expression of NAFLD and non-alcoholic steatohepatitis (NASH) tissue samples to identify common pathways that contribute to NAFLD and NASH pathogenesis.
METHODS We employed the Search Tag Analyze Resource for Gene Expression Omnibus platform to search the The National Center for Biotechnology Information Gene Expression Omnibus to elucidate NAFLD and NASH pathology. For NAFLD, we conducted meta-analysis of data from 58 NAFLD liver biopsies and 60 healthy liver biopsies; for NASH, we analyzed 187 NASH liver biopsies and 154 healthy liver biopsies.
RESULTS Our results from the NAFLD analysis reinforce the role of altered metabolism, inflammation, and cell survival in pathogenesis and support recently described contributors to disease activity, such as altered androgen and long non-coding RNA activity. The top upstream regulator was found to be sterol regulatory element binding transcription factor 1 (SREBF1), a transcription factor involved in lipid homeostasis. Downstream of SREBF1, we observed upregulation in CXCL10, HMGCR, HMGCS1, fatty acid binding protein 5, paternally expressed imprinted gene 10, and downregulation of sex hormone-binding globulin and insulin-like growth factor 1. These molecular changes reflect low-grade inflammation secondary to accumulation of fatty acids in the liver. Our results from the NASH analysis emphasized the role of cholesterol in pathogenesis. Top canonical pathways, disease networks, and disease functions were related to cholesterol synthesis, lipid metabolism, adipogenesis, and metabolic disease. Top upstream regulators included pro-inflammatory cytokines tumor necrosis factor and IL1B, PDGF BB, and beta-estradiol. Inhibition of beta-estradiol was shown to be related to derangement of several cellular downstream processes including metabolism, extracellular matrix deposition, and tumor suppression. Lastly, we found riciribine (an AKT inhibitor) and ZSTK-474 (a PI3K inhibitor) as potential drugs that targeted the differential gene expression in our dataset.
CONCLUSION In this study we describe several molecular processes that may correlate with NAFLD disease and progression. We also identified ricirbine and ZSTK-474 as potential therapy.
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Affiliation(s)
- Jihad Aljabban
- Department of Medicine, University of Wisconsin Hospital and Clinics, Madison, WI 53792, United States
| | - Michael Rohr
- Department of Medicine, University of Central Florida College of Medicine, Orlando, FL 32827, United States
| | - Saad Syed
- Department of Medicine, Northwestern Memorial Hospital, Chicago, IL 60611, United States
| | - Kamal Khorfan
- Department of Gastroenterology and Hepatology, University of California San Francisco-Fresno , Fresno, CA 93701, United States
| | - Vincent Borkowski
- Department of Medicine, University of Wisconsin Hospital and Clinics, Madison, WI 53792, United States
| | - Hisham Aljabban
- Department of Medicine, Barry University, Miami, FL 33161, United States
| | - Michael Segal
- Department of Medicine, University of Wisconsin Hospital and Clinics, Madison, WI 53792, United States
| | - Mohamed Mukhtar
- Department of Medicine, Michigan State University College of Human Medicine, East Lansing, MI 49503, United States
| | - Mohammed Mohammed
- Department of Medicine, Windsor University School of Medicine, Saint Kitts 1621, Cayon, Saint Kitts and Nevis
| | - Maryam Panahiazar
- Department of Surgery, University of California San Francisco, San Francisco, CA 94305, United States
| | - Dexter Hadley
- Department of Artificial Intelligence, Pathology, University of Central Florida College of Medicine , Orlando, FL 32827, United States
| | - Ryan Spengler
- Department of Medicine, University of Wisconsin Hospital and Clinics, Madison, WI 53792, United States
| | - Erin Spengler
- Department of Gastroenterology and Hepatology, University of Wisconsin Hospital and Clinics, Madison, WI 53792, United States
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Mosbah H, Donadille B, Vatier C, Janmaat S, Atlan M, Badens C, Barat P, Béliard S, Beltrand J, Ben Yaou R, Bismuth E, Boccara F, Cariou B, Chaouat M, Charriot G, Christin-Maitre S, De Kerdanet M, Delemer B, Disse E, Dubois N, Eymard B, Fève B, Lascols O, Mathurin P, Nobécourt E, Poujol-Robert A, Prevost G, Richard P, Sellam J, Tauveron I, Treboz D, Vergès B, Vermot-Desroches V, Wahbi K, Jéru I, Vantyghem MC, Vigouroux C. Dunnigan lipodystrophy syndrome: French National Diagnosis and Care Protocol (PNDS; Protocole National de Diagnostic et de Soins). Orphanet J Rare Dis 2022; 17:170. [PMID: 35440056 PMCID: PMC9019936 DOI: 10.1186/s13023-022-02308-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Accepted: 03/24/2022] [Indexed: 11/29/2022] Open
Abstract
Dunnigan syndrome, or Familial Partial Lipodystrophy type 2 (FPLD2; ORPHA 2348), is a rare autosomal dominant disorder due to pathogenic variants of the LMNA gene. The objective of the French National Diagnosis and Care Protocol (PNDS; Protocole National de Diagnostic et de Soins), is to provide health professionals with a guide to optimal management and care of patients with FPLD2, based on a critical literature review and multidisciplinary expert consensus. The PNDS, written by members of the French National Reference Center for Rare Diseases of Insulin Secretion and Insulin Sensitivity (PRISIS), is available on the French Health Authority website (in French). Dunnigan syndrome is characterized by a partial atrophy of the subcutaneous adipose tissue and by an insulin resistance syndrome, associated with a risk of metabolic, cardiovascular and muscular complications. Its prevalence, assessed at 1/100.000 in Europe, is probably considerably underestimated. Thorough clinical examination is key to diagnosis. Biochemical testing frequently shows hyperinsulinemia, abnormal glucose tolerance and hypertriglyceridemia. Elevated hepatic transaminases (hepatic steatosis) and creatine phosphokinase, and hyperandrogenism in women, are common. Molecular analysis of the LMNA gene confirms diagnosis and allows for family investigations. Regular screening and multidisciplinary monitoring of the associated complications are necessary. Diabetes frequently develops from puberty onwards. Hypertriglyceridemia may lead to acute pancreatitis. Early atherosclerosis and cardiomyopathy should be monitored. In women, polycystic ovary syndrome is common. Overall, the management of patients with Dunnigan syndrome requires the collaboration of several health care providers. The attending physician, in conjunction with the national care network, will ensure that the patient receives optimal care through regular follow-up and screening. The various elements of this PNDS are described to provide such a support.
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Affiliation(s)
- H Mosbah
- Endocrinology, Diabetology and Reproductive Endocrinology Department, Assistance Publique-Hôpitaux de Paris, Saint-Antoine University Hospital, National Reference Center for Rare Diseases of Insulin Secretion and Insulin Sensitivity (PRISIS), Paris, France.,Sorbonne University, Inserm UMR_S938, Saint-Antoine Research Centre, Institute of Cardiometabolism and Nutrition, Paris, France
| | - B Donadille
- Endocrinology, Diabetology and Reproductive Endocrinology Department, Assistance Publique-Hôpitaux de Paris, Saint-Antoine University Hospital, National Reference Center for Rare Diseases of Insulin Secretion and Insulin Sensitivity (PRISIS), Paris, France
| | - C Vatier
- Endocrinology, Diabetology and Reproductive Endocrinology Department, Assistance Publique-Hôpitaux de Paris, Saint-Antoine University Hospital, National Reference Center for Rare Diseases of Insulin Secretion and Insulin Sensitivity (PRISIS), Paris, France.,Sorbonne University, Inserm UMR_S938, Saint-Antoine Research Centre, Institute of Cardiometabolism and Nutrition, Paris, France
| | - S Janmaat
- Endocrinology, Diabetology and Reproductive Endocrinology Department, Assistance Publique-Hôpitaux de Paris, Saint-Antoine University Hospital, National Reference Center for Rare Diseases of Insulin Secretion and Insulin Sensitivity (PRISIS), Paris, France.,Sorbonne University, Inserm UMR_S938, Saint-Antoine Research Centre, Institute of Cardiometabolism and Nutrition, Paris, France
| | - M Atlan
- Sorbonne University, Inserm UMR_S938, Saint-Antoine Research Centre, Institute of Cardiometabolism and Nutrition, Paris, France.,Plastic Surgery Department, Assistance Publique-Hôpitaux de Paris, Tenon Hospital, Paris, France
| | - C Badens
- Department of Genetics, Assistance Publique-Hôpitaux de Marseille, Marseille, France
| | - P Barat
- Pediatric Endocrinology Unit, Bordeaux University Hospitals, Bordeaux, France
| | - S Béliard
- Nutrition Department, Assistance Publique-Hôpitaux de Marseille, La Conception Hospital, Marseille, France
| | - J Beltrand
- Paediatric Endocrinology Department, Assistance Publique-Hôpitaux de Paris, Necker Hospital, Paris University, Paris, France
| | - R Ben Yaou
- Assistance Publique-Hôpitaux de Paris, Pitié-Salpêtrière Hospital, Myology Institute, Sorbonne University, Paris, France
| | - E Bismuth
- Paediatric Endocrinology Department, Assistance Publique-Hôpitaux de Paris, Robert Debré Hospital, Paris University, Paris, France
| | - F Boccara
- Cardiology Department, Assistance Publique-Hôpitaux de Paris, St Antoine Hospital, Sorbonne University, Paris, France
| | - B Cariou
- Endocrinology Department, Nantes University Hospitals, Guillaume et René Laennec Hospital, Nantes University, Nantes, France
| | - M Chaouat
- Plastic Surgery Department, Assistance Publique-Hôpitaux de Paris, St Louis Hospital, Paris University, Paris, France
| | - G Charriot
- French Lipodystrophy Association (AFLIP; Association Française des Lipodystrophies), Pierrevert, France
| | - S Christin-Maitre
- Endocrinology, Diabetology and Reproductive Endocrinology Department, Assistance Publique-Hôpitaux de Paris, Saint-Antoine University Hospital, National Reference Center for Rare Diseases of Insulin Secretion and Insulin Sensitivity (PRISIS), Paris, France.,Sorbonne University, Inserm UMR_S938, Saint-Antoine Research Centre, Institute of Cardiometabolism and Nutrition, Paris, France.,Sorbonne University, Inserm UMR_S933, Paris, France
| | - M De Kerdanet
- Paediatric Endocrinology Department, Rennes University Hospitals, South Hospital, Rennes, France
| | - B Delemer
- Endocrinology Department, Reims University Hospitals, Robert Debré Hospital, Reims, France
| | - E Disse
- Endocrinology Department, Lyon University Hospitals, South Lyon Civil Hospital, Lyon University, Pierre Benite, France
| | - N Dubois
- Nutrition Department, Assistance Publique-Hôpitaux de Marseille, La Conception Hospital, Marseille, France
| | - B Eymard
- Assistance Publique-Hôpitaux de Paris, Pitié-Salpêtrière Hospital, Myology Institute, Sorbonne University, Paris, France
| | - B Fève
- Endocrinology, Diabetology and Reproductive Endocrinology Department, Assistance Publique-Hôpitaux de Paris, Saint-Antoine University Hospital, National Reference Center for Rare Diseases of Insulin Secretion and Insulin Sensitivity (PRISIS), Paris, France.,Sorbonne University, Inserm UMR_S938, Saint-Antoine Research Centre, Institute of Cardiometabolism and Nutrition, Paris, France
| | - O Lascols
- Sorbonne University, Inserm UMR_S938, Saint-Antoine Research Centre, Institute of Cardiometabolism and Nutrition, Paris, France.,Molecular Biology and Genetics Department, Assistance Publique-Hôpitaux de Paris, Saint-Antoine University Hospital, Paris, France
| | - P Mathurin
- Hepatology Department, Lille 2 University Hospitals, Lille University, Lille, France
| | - E Nobécourt
- Endocrinology Department, La Reunion University Hospitals, Reunion South Hospital, St Pierre de la Reunion, France
| | - A Poujol-Robert
- Hepatology Department, Assistance Publique-Hôpitaux de Paris, Saint-Antoine Hospital, Sorbonne University, Paris, France
| | - G Prevost
- Endocrinology Department, Rouen University Hospitals, Bois-Guillaume Hospital, Rouen, France
| | - P Richard
- Cardiogenetics and Myogenetics Department, Assistance Publique-Hôpitaux de Paris, Pitie Salpêtrière Hospital, Sorbonne University, Paris, France
| | - J Sellam
- Sorbonne University, Inserm UMR_S938, Saint-Antoine Research Centre, Institute of Cardiometabolism and Nutrition, Paris, France.,Rhumatology Department, Assistance Publique-Hôpitaux de Paris, Saint-Antoine Hospital, Sorbonne University, Paris, France
| | - I Tauveron
- Endocrinology Department, Clermont-Ferrand University Hospital, Clermont Auvergne University, Clermont-Ferrand, France
| | - D Treboz
- French Lipodystrophy Association (AFLIP; Association Française des Lipodystrophies), Pierrevert, France
| | - B Vergès
- Endocrinology-Diabetology Department, Dijon University Hospital, François Mitterand Hospital, Bourgogne University, Dijon, France
| | - V Vermot-Desroches
- Endocrinology, Diabetology and Reproductive Endocrinology Department, Assistance Publique-Hôpitaux de Paris, Saint-Antoine University Hospital, National Reference Center for Rare Diseases of Insulin Secretion and Insulin Sensitivity (PRISIS), Paris, France
| | - K Wahbi
- Cardiology Department, Assistance Publique-Hôpitaux de Paris, Cochin Hospital, Paris University, Paris, France
| | - I Jéru
- Sorbonne University, Inserm UMR_S938, Saint-Antoine Research Centre, Institute of Cardiometabolism and Nutrition, Paris, France.,Molecular Biology and Genetics Department, Assistance Publique-Hôpitaux de Paris, Saint-Antoine University Hospital, Paris, France
| | - M C Vantyghem
- Endocrinology Department, Lille 2 University Hospitals, Lille University, Lille, France
| | - C Vigouroux
- Endocrinology, Diabetology and Reproductive Endocrinology Department, Assistance Publique-Hôpitaux de Paris, Saint-Antoine University Hospital, National Reference Center for Rare Diseases of Insulin Secretion and Insulin Sensitivity (PRISIS), Paris, France. .,Sorbonne University, Inserm UMR_S938, Saint-Antoine Research Centre, Institute of Cardiometabolism and Nutrition, Paris, France. .,Molecular Biology and Genetics Department, Assistance Publique-Hôpitaux de Paris, Saint-Antoine University Hospital, Paris, France.
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11
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Yang Y, Gao L, Chen J, Xiao W, Liu R, Kan H. Lamin B1 is a potential therapeutic target and prognostic biomarker for hepatocellular carcinoma. Bioengineered 2022; 13:9211-9231. [PMID: 35436411 PMCID: PMC9161935 DOI: 10.1080/21655979.2022.2057896] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2022] [Revised: 03/17/2022] [Accepted: 03/21/2022] [Indexed: 12/01/2022] Open
Abstract
Hepatocellular carcinoma (HCC) is an aggressive malignancy. Previous studies have found that lamin B1 (LMNB1) contributes to the development of human cancers. However, the biological functions and prognostic values of LMNB1 in HCC have not been adequately elucidated. In our present research, the expression pattern of LMNB1 was analyzed. The prognostic values of LMNB1 were evaluated by Kaplan-Meier survival analysis and Cox proportional hazards regression analysis. The effects of LMNB1 on HCC progression were assessed by Cell Counting Kit-8 (CCK-8), colony formation, wound healing, Transwell and in vivo xenograft assays. The mechanisms of LMNB1 in HCC progression were elucidated by gene set enrichment analysis (GSEA) and loss-of-function assays. Besides, a nomogram for predicting overall survival (OS) was constructed. The results demonstrated that LMNB1 was overexpressed in HCC and that increased LMNB1 expression predicted a dismal prognosis. Further experiments showed that LMNB1 facilitated cell proliferation and metastasis in HCC. Functional enrichment analysis revealed that LMNB1 modulated metastasis-associated biological functions such as focal adhesion, extracellular matrix, cell junctions and cell adhesion. Mechanistically, we revealed that LMNB1 promoted HCC progression by regulating the phosphatidylinositol 3-kinase (PI3K) and mitogen-activated protein kinase (MAPK) pathways. Moreover, incorporating LMNB1, Ki67 and Barcelona Clinic Liver Cancer (BCLC) stage into a nomogram showed better predictive accuracy than the Tumor-Node-Metastasis (TNM) stage and BCLC stage. In conclusion, LMNB1 may serve as an effective therapeutic target as well as a reliable prognostic biomarker for HCC.
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Affiliation(s)
- Yongyu Yang
- Department of Hepatobiliary Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China
| | - Lei Gao
- Department of Neurosurgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China
| | - Junzhang Chen
- Department of Hepatobiliary Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China
| | - Wang Xiao
- Department of Hepatobiliary Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China
| | - Ruoqi Liu
- Department of Hepatobiliary Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China
| | - Heping Kan
- Department of Hepatobiliary Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China
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12
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Nuclear Envelope Alterations in Myotonic Dystrophy Type 1 Patient-Derived Fibroblasts. Int J Mol Sci 2022; 23:ijms23010522. [PMID: 35008948 PMCID: PMC8745202 DOI: 10.3390/ijms23010522] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2021] [Revised: 12/29/2021] [Accepted: 12/30/2021] [Indexed: 02/01/2023] Open
Abstract
Myotonic dystrophy type 1 (DM1) is a hereditary and multisystemic disease characterized by myotonia, progressive distal muscle weakness and atrophy. The molecular mechanisms underlying this disease are still poorly characterized, although there are some hypotheses that envisage to explain the multisystemic features observed in DM1. An emergent hypothesis is that nuclear envelope (NE) dysfunction may contribute to muscular dystrophies, particularly to DM1. Therefore, the main objective of the present study was to evaluate the nuclear profile of DM1 patient-derived and control fibroblasts and to determine the protein levels and subcellular distribution of relevant NE proteins in these cell lines. Our results demonstrated that DM1 patient-derived fibroblasts exhibited altered intracellular protein levels of lamin A/C, LAP1, SUN1, nesprin-1 and nesprin-2 when compared with the control fibroblasts. In addition, the results showed an altered location of these NE proteins accompanied by the presence of nuclear deformations (blebs, lobes and/or invaginations) and an increased number of nuclear inclusions. Regarding the nuclear profile, DM1 patient-derived fibroblasts had a larger nuclear area and a higher number of deformed nuclei and micronuclei than control-derived fibroblasts. These results reinforce the evidence that NE dysfunction is a highly relevant pathological characteristic observed in DM1.
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13
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Rosas-Madrigal S, Villarreal-Molina MT, Flores-Rivera J, Rivas-Alonso V, Macias-Kauffer LR, Ordoñez G, Chima-Galán MDC, Acuña-Alonzo V, Macín-Pérez G, Barquera R, Granados J, Valle-Rios R, Corona T, Carnevale A, Romero-Hidalgo S. Interaction of HLA Class II rs9272219 and TMPO rs17028450 (Arg690Cys) Variants Affects Neuromyelitis Optica Spectrum Disorder Susceptibility in an Admixed Mexican Population. Front Genet 2021; 12:647343. [PMID: 34335680 PMCID: PMC8320513 DOI: 10.3389/fgene.2021.647343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Accepted: 06/23/2021] [Indexed: 12/02/2022] Open
Abstract
Neuromyelitis Optica Spectrum Disorder (NMOSD) is a demyelinating autoimmune disease of the central nervous system, more prevalent in individuals of non-European ancestry. Few studies have analyzed genetic risk factors in NMOSD, and HLA class II gene variation has been associated NMOSD risk in various populations including Mexicans. Thymopoietin (TMPO) has not been tested as a candidate gene for NMOSD or other autoimmune disease, however, experimental evidence suggests this gene may be involved in negative selection of autoreactive T cells and autoimmunity. We thus investigated whether the missense TMPO variant rs17028450 (Arg630Cys, frequent in Latin America) is associated with NMOSD, and whether this variant shows an interaction with HLA-class II rs9272219, previously associated with NMOSD risk. A total of 119 Mexican NMOSD patients, 1208 controls and 357 Native Mexican individuals were included. The HLA rs9272219 “T” risk allele frequency ranged from 21 to 68%, while the rs17028450 “T” minor allele frequency was as high as 18% in Native Mexican groups. Both rs9272219 and rs17028450 were significantly associated with NMOSD risk under additive models (OR = 2.48; p = 8 × 10–10 and OR = 1.59; p = 0.0075, respectively), and a significant interaction between both variants was identified with logistic regression models (p = 0.048). Individuals bearing both risk alleles had an estimated 3.9-fold increased risk of NMOSD. To our knowledge, this is the first study reporting an association of TMPO gene variation with an autoimmune disorder and the interaction of specific susceptibility gene variants, that may contribute to the genetic architecture of NMOSD in admixed Latin American populations.
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Affiliation(s)
- Sandra Rosas-Madrigal
- Laboratorio de Enfermedades Mendelianas, Instituto Nacional de Medicina Genómica, Mexico City, Mexico
| | | | - José Flores-Rivera
- Laboratorio Clínico de Enfermedades Neurodegenerativas, Instituto Nacional de Neurología y Neurocirugía "Manuel Velasco Suarez" (INNN), Mexico City, Mexico
| | - Verónica Rivas-Alonso
- Laboratorio Clínico de Enfermedades Neurodegenerativas, Instituto Nacional de Neurología y Neurocirugía "Manuel Velasco Suarez" (INNN), Mexico City, Mexico
| | - Luis Rodrigo Macias-Kauffer
- Unidad de Genómica de Poblaciones Aplicada a La Salud, Facultad de Química, UNAM/INMEGEN, Mexico City, Mexico
| | | | | | | | | | - Rodrigo Barquera
- Department of Archaeogenetics, Max Planck Institute for the Science of Human History, Jena, Germany
| | - Julio Granados
- Departamento de Trasplantes, Instituto Nacional de Ciencias Medicas y Nutrición "Salvador Zubirán", Mexico City, Mexico
| | - Ricardo Valle-Rios
- División de Investigación, Facultad de Medicina, Unidad de Investigación en Inmunología y Proteómica, Hospital Infantil de México Federico Gómez, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Teresa Corona
- Laboratorio Clínico de Enfermedades Neurodegenerativas, Instituto Nacional de Neurología y Neurocirugía "Manuel Velasco Suarez" (INNN), Mexico City, Mexico
| | - Alessandra Carnevale
- Laboratorio de Enfermedades Mendelianas, Instituto Nacional de Medicina Genómica, Mexico City, Mexico
| | - Sandra Romero-Hidalgo
- Departamento de Genómica Computacional, Instituto Nacional de Medicina Genómica (INMEGEN), Mexico City, Mexico
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14
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Reduced Lamin A/C Does Not Facilitate Cancer Cell Transendothelial Migration but Compromises Lung Metastasis. Cancers (Basel) 2021; 13:cancers13102383. [PMID: 34069191 PMCID: PMC8157058 DOI: 10.3390/cancers13102383] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Accepted: 05/12/2021] [Indexed: 02/06/2023] Open
Abstract
The mechanisms by which the nuclear lamina of tumor cells influences tumor growth and migration are highly disputed. Lamin A and its variant lamin C are key lamina proteins that control nucleus stiffness and chromatin conformation. Downregulation of lamin A/C in two prototypic metastatic lines, B16F10 melanoma and E0771 breast carcinoma, facilitated cell squeezing through rigid pores, and reduced heterochromatin content. Surprisingly, both lamin A/C knockdown cells grew poorly in 3D spheroids within soft agar, and lamin A/C deficient cells derived from spheroids transcribed lower levels of the growth regulator Yap1. Unexpectedly, the transendothelial migration of both cancer cells in vitro and in vivo, through lung capillaries, was not elevated by lamin A/C knockdown and their metastasis in lungs was even dramatically reduced. Our results are the first indication that reduced lamin A/C content in distinct types of highly metastatic cancer cells does not elevate their transendothelial migration (TEM) capacity and diapedesis through lung vessels but can compromise lung metastasis at a post extravasation level.
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15
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Shah PP, Lv W, Rhoades JH, Poleshko A, Abbey D, Caporizzo MA, Linares-Saldana R, Heffler JG, Sayed N, Thomas D, Wang Q, Stanton LJ, Bedi K, Morley MP, Cappola TP, Owens AT, Margulies KB, Frank DB, Wu JC, Rader DJ, Yang W, Prosser BL, Musunuru K, Jain R. Pathogenic LMNA variants disrupt cardiac lamina-chromatin interactions and de-repress alternative fate genes. Cell Stem Cell 2021; 28:938-954.e9. [PMID: 33529599 PMCID: PMC8106635 DOI: 10.1016/j.stem.2020.12.016] [Citation(s) in RCA: 52] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Revised: 10/13/2020] [Accepted: 12/18/2020] [Indexed: 01/08/2023]
Abstract
Pathogenic mutations in LAMIN A/C (LMNA) cause abnormal nuclear structure and laminopathies. These diseases have myriad tissue-specific phenotypes, including dilated cardiomyopathy (DCM), but how LMNA mutations result in tissue-restricted disease phenotypes remains unclear. We introduced LMNA mutations from individuals with DCM into human induced pluripotent stem cells (hiPSCs) and found that hiPSC-derived cardiomyocytes, in contrast to hepatocytes or adipocytes, exhibit aberrant nuclear morphology and specific disruptions in peripheral chromatin. Disrupted regions were enriched for transcriptionally active genes and regions with lower LAMIN B1 contact frequency. The lamina-chromatin interactions disrupted in mutant cardiomyocytes were enriched for genes associated with non-myocyte lineages and correlated with higher expression of those genes. Myocardium from individuals with LMNA variants similarly showed aberrant expression of non-myocyte pathways. We propose that the lamina network safeguards cellular identity and that pathogenic LMNA variants disrupt peripheral chromatin with specific epigenetic and molecular characteristics, causing misexpression of genes normally expressed in other cell types.
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Affiliation(s)
- Parisha P Shah
- Department of Medicine, University of Pennsylvania, Perelman School of Medicine, Philadelphia, PA 19014, USA; Department of Cell and Developmental Biology, University of Pennsylvania, Perelman School of Medicine, Philadelphia, PA 19014, USA; Penn Cardiovascular Institute, University of Pennsylvania, Perelman School of Medicine, Philadelphia, PA 19014, USA
| | - Wenjian Lv
- Department of Medicine, University of Pennsylvania, Perelman School of Medicine, Philadelphia, PA 19014, USA; Penn Cardiovascular Institute, University of Pennsylvania, Perelman School of Medicine, Philadelphia, PA 19014, USA; Department of Genetics, University of Pennsylvania, Perelman School of Medicine, Philadelphia, PA 19014, USA
| | - Joshua H Rhoades
- Department of Medicine, University of Pennsylvania, Perelman School of Medicine, Philadelphia, PA 19014, USA; Department of Cell and Developmental Biology, University of Pennsylvania, Perelman School of Medicine, Philadelphia, PA 19014, USA; Penn Cardiovascular Institute, University of Pennsylvania, Perelman School of Medicine, Philadelphia, PA 19014, USA; Institute for Biomedical Informatics, University of Pennsylvania, Perelman School of Medicine, Philadelphia, PA 19014, USA
| | - Andrey Poleshko
- Department of Cell and Developmental Biology, University of Pennsylvania, Perelman School of Medicine, Philadelphia, PA 19014, USA
| | - Deepti Abbey
- Penn Cardiovascular Institute, University of Pennsylvania, Perelman School of Medicine, Philadelphia, PA 19014, USA; Department of Genetics, University of Pennsylvania, Perelman School of Medicine, Philadelphia, PA 19014, USA
| | - Matthew A Caporizzo
- Penn Cardiovascular Institute, University of Pennsylvania, Perelman School of Medicine, Philadelphia, PA 19014, USA; Department of Physiology, University of Pennsylvania, Perelman School of Medicine, Philadelphia, PA 19014, USA; Pennsylvania Muscle Institute, University of Pennsylvania, Perelman School of Medicine, Philadelphia, PA 19014, USA
| | - Ricardo Linares-Saldana
- Department of Medicine, University of Pennsylvania, Perelman School of Medicine, Philadelphia, PA 19014, USA; Department of Cell and Developmental Biology, University of Pennsylvania, Perelman School of Medicine, Philadelphia, PA 19014, USA; Penn Cardiovascular Institute, University of Pennsylvania, Perelman School of Medicine, Philadelphia, PA 19014, USA
| | - Julie G Heffler
- Penn Cardiovascular Institute, University of Pennsylvania, Perelman School of Medicine, Philadelphia, PA 19014, USA; Department of Physiology, University of Pennsylvania, Perelman School of Medicine, Philadelphia, PA 19014, USA; Pennsylvania Muscle Institute, University of Pennsylvania, Perelman School of Medicine, Philadelphia, PA 19014, USA
| | - Nazish Sayed
- Stanford Cardiovascular Institute, Department of Surgery, Division of Vascular Surgery, Stanford University, Stanford, CA 94305, USA
| | - Dilip Thomas
- Stanford Cardiovascular Institute, Department of Medicine, Stanford University, Stanford, CA 94305, USA
| | - Qiaohong Wang
- Department of Medicine, University of Pennsylvania, Perelman School of Medicine, Philadelphia, PA 19014, USA; Department of Cell and Developmental Biology, University of Pennsylvania, Perelman School of Medicine, Philadelphia, PA 19014, USA; Penn Cardiovascular Institute, University of Pennsylvania, Perelman School of Medicine, Philadelphia, PA 19014, USA
| | - Liam J Stanton
- Department of Medicine, University of Pennsylvania, Perelman School of Medicine, Philadelphia, PA 19014, USA; Department of Cell and Developmental Biology, University of Pennsylvania, Perelman School of Medicine, Philadelphia, PA 19014, USA; Penn Cardiovascular Institute, University of Pennsylvania, Perelman School of Medicine, Philadelphia, PA 19014, USA
| | - Kenneth Bedi
- Department of Medicine, University of Pennsylvania, Perelman School of Medicine, Philadelphia, PA 19014, USA; Penn Cardiovascular Institute, University of Pennsylvania, Perelman School of Medicine, Philadelphia, PA 19014, USA
| | - Michael P Morley
- Department of Medicine, University of Pennsylvania, Perelman School of Medicine, Philadelphia, PA 19014, USA; Penn Cardiovascular Institute, University of Pennsylvania, Perelman School of Medicine, Philadelphia, PA 19014, USA; Penn Lung Institute, University of Pennsylvania, Perelman School of Medicine, Philadelphia, PA 19014, USA
| | - Thomas P Cappola
- Department of Medicine, University of Pennsylvania, Perelman School of Medicine, Philadelphia, PA 19014, USA; Penn Cardiovascular Institute, University of Pennsylvania, Perelman School of Medicine, Philadelphia, PA 19014, USA
| | - Anjali T Owens
- Department of Medicine, University of Pennsylvania, Perelman School of Medicine, Philadelphia, PA 19014, USA; Penn Cardiovascular Institute, University of Pennsylvania, Perelman School of Medicine, Philadelphia, PA 19014, USA
| | - Kenneth B Margulies
- Department of Medicine, University of Pennsylvania, Perelman School of Medicine, Philadelphia, PA 19014, USA; Penn Cardiovascular Institute, University of Pennsylvania, Perelman School of Medicine, Philadelphia, PA 19014, USA
| | - David B Frank
- Penn Cardiovascular Institute, University of Pennsylvania, Perelman School of Medicine, Philadelphia, PA 19014, USA; Department of Pediatrics, University of Pennsylvania, Perelman School of Medicine, Philadelphia, PA 19014, USA
| | - Joseph C Wu
- Stanford Cardiovascular Institute, Department of Medicine, Institute for Stem Cell Biology and Regenerative Medicine, Stanford University, Stanford, CA 94305, USA
| | - Daniel J Rader
- Penn Cardiovascular Institute, University of Pennsylvania, Perelman School of Medicine, Philadelphia, PA 19014, USA; Department of Genetics, University of Pennsylvania, Perelman School of Medicine, Philadelphia, PA 19014, USA
| | - Wenli Yang
- Department of Medicine, University of Pennsylvania, Perelman School of Medicine, Philadelphia, PA 19014, USA; Penn Cardiovascular Institute, University of Pennsylvania, Perelman School of Medicine, Philadelphia, PA 19014, USA; Institute for Regenerative Medicine, University of Pennsylvania, Perelman School of Medicine, Philadelphia, PA 19014, USA
| | - Benjamin L Prosser
- Penn Cardiovascular Institute, University of Pennsylvania, Perelman School of Medicine, Philadelphia, PA 19014, USA; Department of Physiology, University of Pennsylvania, Perelman School of Medicine, Philadelphia, PA 19014, USA; Pennsylvania Muscle Institute, University of Pennsylvania, Perelman School of Medicine, Philadelphia, PA 19014, USA
| | - Kiran Musunuru
- Department of Medicine, University of Pennsylvania, Perelman School of Medicine, Philadelphia, PA 19014, USA; Penn Cardiovascular Institute, University of Pennsylvania, Perelman School of Medicine, Philadelphia, PA 19014, USA; Department of Genetics, University of Pennsylvania, Perelman School of Medicine, Philadelphia, PA 19014, USA.
| | - Rajan Jain
- Department of Medicine, University of Pennsylvania, Perelman School of Medicine, Philadelphia, PA 19014, USA; Department of Cell and Developmental Biology, University of Pennsylvania, Perelman School of Medicine, Philadelphia, PA 19014, USA; Penn Cardiovascular Institute, University of Pennsylvania, Perelman School of Medicine, Philadelphia, PA 19014, USA; Institute for Regenerative Medicine, University of Pennsylvania, Perelman School of Medicine, Philadelphia, PA 19014, USA.
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Luo X, Bai Y, He S, Sun S, Jiang X, Yang Z, Lu D, Wei P, Liang Y, Peng C, Wang Y, Sheng R, Han S, Li X, Zhang B. Sirtuin 1 ameliorates defenestration in hepatic sinusoidal endothelial cells during liver fibrosis via inhibiting stress-induced premature senescence. Cell Prolif 2021; 54:e12991. [PMID: 33522656 PMCID: PMC7941223 DOI: 10.1111/cpr.12991] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2020] [Revised: 12/02/2020] [Accepted: 12/26/2020] [Indexed: 12/13/2022] Open
Abstract
OBJECTIVE Premature senescence is related to progerin and involves in endothelial dysfunction and liver diseases. Activating sirtuin 1 (SIRT1) ameliorates liver fibrosis. However, the mechanisms of premature senescence in defenestration of hepatic sinusoidal endothelial cells (HSECs) and how SIRT1 affects HSECs fenestrae remain elusive. METHODS We employed the CCl4 -induced liver fibrogenesis rat models and cultured primary HSECs in vitro, administered with the SIRT1-adenovirus vector, the activator of SIRT1 and knockdown NOX2. We measured the activity of senescence-associated β-galactosidase (SA-β-gal) in HSECs. Meanwhile, the protein expression of SIRT1, NOX2, progerin, Lamin A/C, Ac p53 K381 and total p53 was detected by Western blot, co-immunoprecipitation and immunofluorescence. RESULTS In vivo, premature senescence was triggered by oxidative stress during CCl4 -induced HSECs defenestration and liver fibrogenesis, whereas overexpressing SIRT1 with adenovirus vector lessened premature senescence to relieve CCl4 -induced HSECs defenestration and liver fibrosis. In vitro, HSECs fenestrae disappeared, with emerging progerin-associated premature senescence; these effects were aggravated by H2 O2 . Nevertheless, knockdown of NOX2, activation of SIRT1 with resveratrol and SIRT1-adenovirus vector inhibited progerin-associated premature senescence to maintain fenestrae through deacetylating p53. Furthermore, more Ac p53 K381 and progerin co-localized with the abnormal accumulation of actin filament (F-actin) in the nuclear envelope of H2 O2 -treated HSECs; in contrast, these effects were rescued by overexpressing SIRT1. CONCLUSION SIRT1-mediated deacetylation maintains HSECs fenestrae and attenuates liver fibrogenesis through inhibiting oxidative stress-induced premature senescence.
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Affiliation(s)
- Xiaoying Luo
- Department of GastroenterologyHenan Provincial People's HospitalPeople's Hospital of Zhengzhou UniversitySchool of Clinical MedicineHenan UniversityZhengzhouChina
- Microbiome LaboratoryHenan Provincial People's HospitalPeople's Hospital of Zhengzhou UniversityZhengzhouChina
| | - Yangqiu Bai
- Department of GastroenterologyHenan Provincial People's HospitalPeople's Hospital of Zhengzhou UniversitySchool of Clinical MedicineHenan UniversityZhengzhouChina
| | - Shuli He
- Department of GastroenterologyHenan Provincial People's HospitalPeople's Hospital of Zhengzhou UniversitySchool of Clinical MedicineHenan UniversityZhengzhouChina
| | - Suofeng Sun
- Department of GastroenterologyHenan Provincial People's HospitalPeople's Hospital of Zhengzhou UniversitySchool of Clinical MedicineHenan UniversityZhengzhouChina
- Microbiome LaboratoryHenan Provincial People's HospitalPeople's Hospital of Zhengzhou UniversityZhengzhouChina
| | - Xiaoke Jiang
- Department of GastroenterologyHenan Provincial People's HospitalPeople's Hospital of Zhengzhou UniversitySchool of Clinical MedicineHenan UniversityZhengzhouChina
| | - Zhiyu Yang
- Department of GastroenterologyHenan Provincial People's HospitalPeople's Hospital of Zhengzhou UniversitySchool of Clinical MedicineHenan UniversityZhengzhouChina
- Microbiome LaboratoryHenan Provincial People's HospitalPeople's Hospital of Zhengzhou UniversityZhengzhouChina
| | - Di Lu
- Department of GastroenterologyHenan Provincial People's HospitalPeople's Hospital of Zhengzhou UniversitySchool of Clinical MedicineHenan UniversityZhengzhouChina
- Microbiome LaboratoryHenan Provincial People's HospitalPeople's Hospital of Zhengzhou UniversityZhengzhouChina
| | - Peiru Wei
- Department of GastroenterologyHenan Provincial People's HospitalPeople's Hospital of Zhengzhou UniversitySchool of Clinical MedicineHenan UniversityZhengzhouChina
| | - Yuan Liang
- Department of GastroenterologyHenan Provincial People's HospitalPeople's Hospital of Zhengzhou UniversitySchool of Clinical MedicineHenan UniversityZhengzhouChina
| | - Cong Peng
- Department of GastroenterologyHenan Provincial People's HospitalPeople's Hospital of Zhengzhou UniversitySchool of Clinical MedicineHenan UniversityZhengzhouChina
| | - Yaru Wang
- Department of GastroenterologyHenan Provincial People's HospitalPeople's Hospital of Zhengzhou UniversitySchool of Clinical MedicineHenan UniversityZhengzhouChina
| | - Ruli Sheng
- Department of GastroenterologyHenan Provincial People's HospitalPeople's Hospital of Zhengzhou UniversitySchool of Clinical MedicineHenan UniversityZhengzhouChina
| | - Shuangyin Han
- Department of GastroenterologyHenan Provincial People's HospitalPeople's Hospital of Zhengzhou UniversitySchool of Clinical MedicineHenan UniversityZhengzhouChina
| | - Xiuling Li
- Department of GastroenterologyHenan Provincial People's HospitalPeople's Hospital of Zhengzhou UniversitySchool of Clinical MedicineHenan UniversityZhengzhouChina
| | - Bingyong Zhang
- Department of GastroenterologyHenan Provincial People's HospitalPeople's Hospital of Zhengzhou UniversitySchool of Clinical MedicineHenan UniversityZhengzhouChina
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Cellular stress signaling activates type-I IFN response through FOXO3-regulated lamin posttranslational modification. Nat Commun 2021; 12:640. [PMID: 33510167 PMCID: PMC7843645 DOI: 10.1038/s41467-020-20839-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Accepted: 12/19/2020] [Indexed: 01/16/2023] Open
Abstract
Neural stem/progenitor cells (NSPCs) persist over the lifespan while encountering constant challenges from age or injury related brain environmental changes like elevated oxidative stress. But how oxidative stress regulates NSPC and its neurogenic differentiation is less clear. Here we report that acutely elevated cellular oxidative stress in NSPCs modulates neurogenic differentiation through induction of Forkhead box protein O3 (FOXO3)-mediated cGAS/STING and type I interferon (IFN-I) responses. We show that oxidative stress activates FOXO3 and its transcriptional target glycine-N-methyltransferase (GNMT) whose upregulation triggers depletion of s-adenosylmethionine (SAM), a key co-substrate involved in methyl group transfer reactions. Mechanistically, we demonstrate that reduced intracellular SAM availability disrupts carboxymethylation and maturation of nuclear lamin, which induce cytosolic release of chromatin fragments and subsequent activation of the cGAS/STING-IFN-I cascade to suppress neurogenic differentiation. Together, our findings suggest the FOXO3-GNMT/SAM-lamin-cGAS/STING-IFN-I signaling cascade as a critical stress response program that regulates long-term regenerative potential. Neural stem and progenitor cells (NSPCs) encounter constant stresses during aging, such as elevated oxidative stress. Here the authors show that oxidative stress induced reduction in NSPC neural differentiation is mediated by a FOXO3-GNMT/SAM-lamin-cGAS/STING-IFN-I signalling cascade initiated by FOXO3 oxidation.
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Redmond CJ, Coulombe PA. Intermediate filaments as effectors of differentiation. Curr Opin Cell Biol 2020; 68:155-162. [PMID: 33246268 DOI: 10.1016/j.ceb.2020.10.009] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2020] [Revised: 10/09/2020] [Accepted: 10/12/2020] [Indexed: 12/16/2022]
Abstract
After the initial discovery of intermediate filament (IF)-forming proteins in 1968, a decade would elapse before they were revealed to comprise a diverse group of proteins which undergo tissue-, developmental stage-, differentiation-, and context-dependent regulation. Our appreciation for just how large (n = 70), conserved, complex, and dynamic IF genes and proteins are became even sharper upon completion of the human genome project. While there has been extraordinary progress in understanding the multimodal roles of IFs in cells and tissues, even revealing them as direct causative agents in a broad array of human genetic disorders, the link between individual IFs and cell differentiation has remained elusive. Here, we review evidence that demonstrates a role for IFs in lineage determination, cell differentiation, and tissue homeostasis. A major theme in this review is the function of IFs as sensors and transducers of mechanical forces, intersecting microenvironmental cues and fundamental processes through cellular redox balance.
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Affiliation(s)
- Catherine J Redmond
- Graduate Program in Cancer Biology, University of Michigan Medical School, Ann Arbor, MI, 48109, USA; Department of Cell and Developmental Biology, University of Michigan Medical School, Ann Arbor, MI, 48109, USA
| | - Pierre A Coulombe
- Graduate Program in Cancer Biology, University of Michigan Medical School, Ann Arbor, MI, 48109, USA; Department of Cell and Developmental Biology, University of Michigan Medical School, Ann Arbor, MI, 48109, USA; Department of Dermatology, University of Michigan Medical School, Ann Arbor, MI, 48109, USA; Rogel Cancer Center, University of Michigan Medical School, Ann Arbor, MI, 48109, USA.
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Lin EW, Brady GF, Kwan R, Nesvizhskii AI, Omary MB. Genotype-phenotype analysis of LMNA-related diseases predicts phenotype-selective alterations in lamin phosphorylation. FASEB J 2020; 34:9051-9073. [PMID: 32413188 PMCID: PMC8059629 DOI: 10.1096/fj.202000500r] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Revised: 04/12/2020] [Accepted: 04/15/2020] [Indexed: 12/17/2022]
Abstract
Laminopathies are rare diseases associated with mutations in LMNA, which encodes nuclear lamin A/C. LMNA variants lead to diverse tissue-specific phenotypes including cardiomyopathy, lipodystrophy, myopathy, neuropathy, progeria, bone/skin disorders, and overlap syndromes. The mechanisms underlying these heterogeneous phenotypes remain poorly understood, although post-translational modifications, including phosphorylation, are postulated as regulators of lamin function. We catalogued all known lamin A/C human mutations and their associated phenotypes, and systematically examined the putative role of phosphorylation in laminopathies. In silico prediction of specific LMNA mutant-driven changes to lamin A phosphorylation and protein structure was performed using machine learning methods. Some of the predictions we generated were validated via assessment of ectopically expressed wild-type and mutant LMNA. Our findings indicate phenotype- and mutant-specific alterations in lamin phosphorylation, and that some changes in phosphorylation may occur independently of predicted changes in lamin protein structure. Therefore, therapeutic targeting of phosphorylation in the context of laminopathies will likely require mutant- and kinase-specific approaches.
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Affiliation(s)
- Eric W Lin
- Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, MI, USA
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA
| | - Graham F Brady
- Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, MI, USA
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA
| | - Raymond Kwan
- Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, MI, USA
- Center for Advanced Biotechnology and Medicine, Rutgers University, Piscataway, NJ, USA
| | - Alexey I Nesvizhskii
- Department of Computational Medicine and Bioinformatics, University of Michigan, Ann Arbor, MI, USA
- Department of Pathology, University of Michigan, Ann Arbor, MI, USA
| | - M Bishr Omary
- Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, MI, USA
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA
- Center for Advanced Biotechnology and Medicine, Rutgers University, Piscataway, NJ, USA
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Role of the Nuclear Lamina in Age-Associated Nuclear Reorganization and Inflammation. Cells 2020; 9:cells9030718. [PMID: 32183360 PMCID: PMC7140666 DOI: 10.3390/cells9030718] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Revised: 03/11/2020] [Accepted: 03/12/2020] [Indexed: 02/06/2023] Open
Abstract
Aging is characterized by the gradual loss of tissue function and integrity. Activation of inflammatory responses accelerates the deterioration of cells and tissues. Many studies have shown that alteration of the components of the nuclear lamina is associated with inflammation, both in vivo and in vitro. However, the mechanism by which the nuclear lamina regulates inflammation is largely unknown. Recent studies have suggested that the nuclear lamina regulates both organization of the three-dimensional chromatin structure at the nuclear periphery and global gene expression, such as the expression of inflammatory response genes. Here, we discuss the current updates in the research on nuclear lamina alteration, activation of inflammation, and nuclear reorganization in models of cellular senescence and organismal aging.
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Liu CH, Chien MJ, Chang YC, Cheng YH, Li FA, Mou KY. Combining Proximity Labeling and Cross-Linking Mass Spectrometry for Proteomic Dissection of Nuclear Envelope Interactome. J Proteome Res 2020; 19:1109-1118. [DOI: 10.1021/acs.jproteome.9b00609] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Cheng-Hao Liu
- Institute of Biomedical Sciences, Academia Sinica, Taipei 11529, Taiwan
- Taiwan International Graduate Program in Molecular Medicine, National Yang-Ming University and Academia Sinica, Taipei 11529, Taiwan
| | - Ming-Jou Chien
- Institute of Biomedical Sciences, Academia Sinica, Taipei 11529, Taiwan
| | - You-Chiun Chang
- Institute of Biomedical Sciences, Academia Sinica, Taipei 11529, Taiwan
| | - Yu-Hsiang Cheng
- Institute of Biomedical Sciences, Academia Sinica, Taipei 11529, Taiwan
| | - Fu-An Li
- Institute of Biomedical Sciences, Academia Sinica, Taipei 11529, Taiwan
| | - Kurt Yun Mou
- Institute of Biomedical Sciences, Academia Sinica, Taipei 11529, Taiwan
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Maitra D, Bragazzi Cunha J, Elenbaas JS, Bonkovsky HL, Shavit JA, Omary MB. Porphyrin-Induced Protein Oxidation and Aggregation as a Mechanism of Porphyria-Associated Cell Injury. Cell Mol Gastroenterol Hepatol 2019; 8:535-548. [PMID: 31233899 PMCID: PMC6820234 DOI: 10.1016/j.jcmgh.2019.06.006] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/15/2019] [Revised: 06/14/2019] [Accepted: 06/14/2019] [Indexed: 12/12/2022]
Abstract
Genetic porphyrias comprise eight diseases caused by defects in the heme biosynthetic pathway that lead to accumulation of heme precursors. Consequences of porphyria include photosensitivity, liver damage and increased risk of hepatocellular carcinoma, and neurovisceral involvement, including seizures. Fluorescent porphyrins that include protoporphyrin-IX, uroporphyrin and coproporphyrin, are photo-reactive; they absorb light energy and are excited to high-energy singlet and triplet states. Decay of the porphyrin excited to ground state releases energy and generates singlet oxygen. Porphyrin-induced oxidative stress is thought to be the major mechanism of porphyrin-mediated tissue damage. Although this explains the acute photosensitivity in most porphyrias, light-induced porphyrin-mediated oxidative stress does not account for the effect of porphyrins on internal organs. Recent findings demonstrate the unique role of fluorescent porphyrins in causing subcellular compartment-selective protein aggregation. Porphyrin-mediated protein aggregation associates with nuclear deformation, cytoplasmic vacuole formation and endoplasmic reticulum dilation. Porphyrin-triggered proteotoxicity is compounded by inhibition of the proteasome due to aggregation of some of its subunits. The ensuing disruption in proteostasis also manifests in cell cycle arrest coupled with aggregation of cell proliferation-related proteins, including PCNA, cdk4 and cyclin B1. Porphyrins bind to native proteins and, in presence of light and oxygen, oxidize several amino acids, particularly methionine. Noncovalent interaction of oxidized proteins with porphyrins leads to formation of protein aggregates. In internal organs, particularly the liver, light-independent porphyrin-mediated protein aggregation occurs after secondary triggers of oxidative stress. Thus, porphyrin-induced protein aggregation provides a novel mechanism for external and internal tissue damage in porphyrias that involve fluorescent porphyrin accumulation.
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Affiliation(s)
- Dhiman Maitra
- Department of Molecular and Integrative Physiology, University of Michigan Medical School, Ann Arbor, Michigan.
| | - Juliana Bragazzi Cunha
- Department of Molecular and Integrative Physiology, University of Michigan Medical School, Ann Arbor, Michigan
| | - Jared S Elenbaas
- Medical Scientist Training Program, Washington University in St. Louis, St. Louis, Missouri
| | - Herbert L Bonkovsky
- Gastroenterology & Hepatology, and Molecular Medicine & Translational Science, Wake Forest University School of Medicine/NC Baptist Hospital, Winston-Salem, North Carolina
| | - Jordan A Shavit
- Department of Pediatrics, Division of Pediatric Hematology and Oncology, University of Michigan Medical School, Ann Arbor, Michigan
| | - M Bishr Omary
- Department of Molecular and Integrative Physiology, University of Michigan Medical School, Ann Arbor, Michigan; Department of Internal Medicine, University of Michigan Medical School, Ann Arbor, Michigan; Cell Biology, Faculty of Science and Technology, Åbo Akademi University, Turku, Finland
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Senescent Hepatocytes in Decompensated Liver Show Reduced UPR MT and Its Key Player, CLPP, Attenuates Senescence In Vitro. Cell Mol Gastroenterol Hepatol 2019; 8:73-94. [PMID: 30878663 PMCID: PMC6520637 DOI: 10.1016/j.jcmgh.2019.03.001] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Revised: 02/28/2019] [Accepted: 03/01/2019] [Indexed: 02/06/2023]
Abstract
BACKGROUND AND AIMS Non-dividing hepatocytes in end-stage liver disease indicates permanent growth arrest similar to senescence. Identifying senescence in vivo is often challenging and mechanisms inhibiting senescence are poorly understood. In lower organisms mitochondrial unfolded protein response (UPRMT) helps in increasing longevity; however, its role in senescence and liver disease is poorly understood. Aim of this study was to identify hepatocyte senescence and the role of UPRMT in cryptogenic cirrhosis. METHODS Doxorubicin was used to induce senescence in non-neoplastic hepatocytes (PH5CH8) and hepatoma cells (HepG2 and Huh7). Senescence-associated markers and unfolded protein response was evaluated by fluorescence microscopy, immunoblotting and gene expression. Explants/biopsies from normal, fibrosis, compensated and decompensated cirrhosis without any known etiology were examined for presence of senescence and UPRMT by immunohistochemistry and gene expression. RESULTS Accumulation of senescent hepatocytes in cryptogenic cirrhosis was associated with reduced proliferation, increased expression of γH2AX and p21, together with loss of LaminB1. Dysfunctional mitochondria and compromised UPRMT were key features of senescent hepatocytes both in vitro and also in decompensated cirrhosis. Intriguingly, compensated cirrhotic liver mounted strong UPRMT, with high levels of mitochondrial protease, CLPP. Overexpression of CLPP inhibited senescence in vitro, by reducing mitochondrial ROS and altering oxygen consumption. CONCLUSIONS Our results implicate a role of hepatocyte senescence in cryptogenic cirrhosis together with a crucial role of UPRMT in preventing hepatocyte senescence. A compromised UPRMT may shift the fate of cirrhotic liver toward decompensation by exaggerating hepatocyte senescence. Restoring CLPP levels at least in cell culture appears as a promising strategy in mitohormesis, thereby, preventing senescence and possibly improving hepatocyte function.
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Ho R, Hegele RA. Complex effects of laminopathy mutations on nuclear structure and function. Clin Genet 2018; 95:199-209. [DOI: 10.1111/cge.13455] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2018] [Revised: 09/26/2018] [Accepted: 09/27/2018] [Indexed: 12/12/2022]
Affiliation(s)
- Rosettia Ho
- Departments of Biochemistry and Medicine, and Robarts Research Institute; Schulich School of Medicine and Dentistry, Western University; London Ontario Canada
| | - Robert A. Hegele
- Departments of Biochemistry and Medicine, and Robarts Research Institute; Schulich School of Medicine and Dentistry, Western University; London Ontario Canada
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