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Tanaka T, Miyakoshi Y, Kobayashi Y, Xiaolong S, Daiyang Y, Ochi H, Sato S, Kato T, Yoshii T, Okawa A, Kaldis P, Inose H. Regulation of Osteoblast to Osteocyte Differentiation by Cyclin-Dependent Kinase-1. Adv Biol (Weinh) 2023; 7:e2300136. [PMID: 37424388 DOI: 10.1002/adbi.202300136] [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: 04/07/2023] [Revised: 06/16/2023] [Indexed: 07/11/2023]
Abstract
Osteocytes have recently been identified as a new regulator of bone remodeling, but the detailed mechanism of their differentiation from osteoblasts remains unclear. The purpose of this study is to identify cell cycle regulators involved in the differentiation of osteoblasts into osteocytes and determine their physiological significance. The study uses IDG-SW3 cells as a model for the differentiation from osteoblasts to osteocytes. Among the major cyclin-dependent kinases (Cdks), Cdk1 is most abundantly expressed in IDG-SW3 cells, and its expression is down-regulated during differentiation into osteocytes. Inhibition of CDK1 activity reduces IDG-SW3 cell proliferation and differentiation into osteocytes. Osteocyte and Osteoblast-specific Cdk1 knockout in mice (Dmp1-Cdk1KO ) results in trabecular bone loss. Pthlh expression increases during differentiation, but inhibiting CDK1 activity reduces Pthlh expression. Parathyroid hormone-related protein concentration is reduced in the bone marrow of Dmp1-Cdk1KO mice. Four weeks of Parathyroid hormone administration partially recovers the trabecular bone loss in Dmp1-Cdk1KO mice. These results demonstrate that Cdk1 plays an essential role in the differentiation from osteoblast to osteocyte and the acquisition and maintenance of bone mass. The findings contribute to a better understanding of the mechanisms of bone mass regulation and can help develop efficient therapeutic strategies for osteoporosis treatment.
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Affiliation(s)
- Tomoyuki Tanaka
- Department of Orthopaedics, Graduate School, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-Ku, Tokyo, 113-8519, Japan
- Department of Orthopaedic Surgery, Dokkyo Medical University Saitama Medical Center, 2-1-50 Minamikoshigaya, Koshigaya-shi, Saitama, 343-8555, Japan
| | - Yuri Miyakoshi
- Department of Orthopaedics, Graduate School, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-Ku, Tokyo, 113-8519, Japan
| | - Yutaka Kobayashi
- Department of Orthopaedics, Graduate School, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-Ku, Tokyo, 113-8519, Japan
| | - Sun Xiaolong
- Department of Orthopaedics, Graduate School, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-Ku, Tokyo, 113-8519, Japan
| | - Yu Daiyang
- Department of Orthopaedics, Graduate School, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-Ku, Tokyo, 113-8519, Japan
| | - Hiroki Ochi
- Department of Rehabilitation for Movement Functions, Research Institute, National Rehabilitation Center for Persons with Disabilities, 4-1 Namiki, Tokorozawa, Saitama, 359-8555, Japan
| | - Shingo Sato
- Center for Innovative Cancer Treatment, Tokyo Medical and Dental University Hospital, 1-5-45 Yushima, Bunkyo-Ku, Tokyo, 113-8519, Japan
| | - Tsuyoshi Kato
- Department of Orthopaedics, Graduate School, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-Ku, Tokyo, 113-8519, Japan
| | - Toshitaka Yoshii
- Department of Orthopaedics, Graduate School, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-Ku, Tokyo, 113-8519, Japan
| | - Atsushi Okawa
- Department of Orthopaedics, Graduate School, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-Ku, Tokyo, 113-8519, Japan
| | - Philipp Kaldis
- Department of Clinical Sciences, Lund University, Clinical Research Centre (CRC) Box 50332, Malmö, SE-202 13, Sweden
- Lund University Diabetes Centre (LUDC), Lund University, Malmö, SE-202 13, Sweden
| | - Hiroyuki Inose
- Department of Orthopaedic Surgery, Dokkyo Medical University Saitama Medical Center, 2-1-50 Minamikoshigaya, Koshigaya-shi, Saitama, 343-8555, Japan
- Department of Orthopedic and Trauma Research, Graduate School, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-Ku, Tokyo, 113-8519, Japan
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Cell-Dependent Pathogenic Roles of Filamin B in Different Skeletal Malformations. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2022; 2022:8956636. [PMID: 35832491 PMCID: PMC9273461 DOI: 10.1155/2022/8956636] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/30/2021] [Accepted: 06/10/2022] [Indexed: 11/17/2022]
Abstract
Mutations of filamin B (FLNB) gene can lead to a spectrum of autosomal skeletal malformations including spondylocarpotarsal syndrome (SCT), Larsen syndrome (LRS), type I atelosteogenesis (AO1), type III atelosteogenesis (AO3), and boomerang dysplasia (BD). Among them, LRS is milder while BD causes a more severe phenotype. However, the molecular mechanism underlying the differences in clinical phenotypes of different FLNB variants has not been fully determined. Here, we presented two patients suffering from autosomal dominant LRS and autosomal recessive vitamin D-dependent rickets type IA (VDDR-IA). Whole-exome sequencing revealed two novel missense variants in FLNB, c.4846A>G (p.T1616A) and c.7022T>G (p.I2341R), which are located in repeat 15 and 22 of filamin B, respectively. The expression of FLNBI2341R in the muscle tissue from our LRS patient was remarkably increased. And in vitro studies showed that both variants led to a lack of filopodia and accumulation of the mutants in the perinuclear region in HEK293 cells. We also found that c.4846A>G (p.T1616A) and c.7022T>G (p.I2341R) regulated endochondral osteogenesis in different ways. c.4846A>G (p.T1616A) activated AKT pathways through inhibiting SHIP2, suppressed the Smad3 pathway, and impaired the expression of Runx2 in both Saos-2 and ATDC5 cells. c.7022T>G (p.I2341R) activated both AKT and Smad3 pathways and increased the expression of Runx2 in Saos-2 cells, while in ATDC5 cells it activated AKT pathways through inhibiting SHIP2, suppressed the Smad3 pathway, and reduced the expression of Runx2. Our study demonstrated the pathogenic mechanisms of two novel FLNB variants in two different clinical settings and proved that FLNB variants could not only directly cause skeletal malformations but also worsen skeletal symptoms in the setting of other skeletal diseases. Besides, FLNB variants differentially affect skeletal development which contributes to clinical heterogeneity of FLNB-related disorders.
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Yu F, Li JL, Feng WR, Tang YK, Su SY, Xu P, Zhong H. Heat Shock Procedure Affects Cell Division-Associated Genes in Gynogenetic Manipulation. MARINE BIOTECHNOLOGY (NEW YORK, N.Y.) 2022; 24:354-365. [PMID: 35305189 DOI: 10.1007/s10126-022-10112-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2021] [Accepted: 03/02/2022] [Indexed: 06/14/2023]
Abstract
Heat shock procedure is crucial for gynogenetic manipulation leading to diploidization of the maternal genomes; however, the underlying molecular mechanism especially the transcriptomic changes during this procedure has still not been unveiled yet. Here, the artificial gynogenesis of zebrafish (Danio rerio) using inactivated sperm from rare minnow (Gobiocypris rarus) was conducted. We found that artificial gynogenetic manipulation, including pseudo-fertilization and heat shock, decreased hatching rates, whereas heat shock treatment alone had medium hatching rates. The first cleavage changed the expression of genes associated with RNA transcription and protein synthesis. A co-expression network regulated by hub genes GIT1, Sepsecs, and FLNB was significantly correlated with heat shock procedure. The cyclin family and cyclin-dependent kinase-related genes were lowly expressed in embryos from gynogenetic zebrafish, and genes involved in controlling the cell cycle and genomic stability were significantly altered by the gynogenetic treatment. Our results show the effects of artificial gynogenesis on embryos and describe changes in gene expression that suggest drastic changes take place in cell division by heat shock procedure. These findings will contribute to an understanding of the molecular basis for germplasm improving, including the purifying effect and allogynogenetic biological effect by gynogenesis.
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Affiliation(s)
- Fan Yu
- Key Laboratory of Freshwater Fisheries and Germplasm Resources Utilization, Ministry of Agriculture, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi, 214081, China
| | - Jian-Lin Li
- Key Laboratory of Freshwater Fisheries and Germplasm Resources Utilization, Ministry of Agriculture, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi, 214081, China
| | - Wen-Rong Feng
- Key Laboratory of Freshwater Fisheries and Germplasm Resources Utilization, Ministry of Agriculture, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi, 214081, China
| | - Yong-Kai Tang
- Key Laboratory of Freshwater Fisheries and Germplasm Resources Utilization, Ministry of Agriculture, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi, 214081, China
| | - Sheng-Yan Su
- Key Laboratory of Freshwater Fisheries and Germplasm Resources Utilization, Ministry of Agriculture, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi, 214081, China
| | - Pao Xu
- Key Laboratory of Freshwater Fisheries and Germplasm Resources Utilization, Ministry of Agriculture, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi, 214081, China.
| | - Huan Zhong
- Hunan Research Center of Engineering Technology for Utilization of Distinctive Aquatic Resource, Hunan Agricultural University, Changsha, 410128, China.
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S. UK, Sankar S, Younes S, D. TK, Ahmad MN, Okashah SS, Kamaraj B, Al-Subaie AM, C. GPD, Zayed H. Deciphering the Role of Filamin B Calponin-Homology Domain in Causing the Larsen Syndrome, Boomerang Dysplasia, and Atelosteogenesis Type I Spectrum Disorders via a Computational Approach. Molecules 2020; 25:E5543. [PMID: 33255942 PMCID: PMC7730838 DOI: 10.3390/molecules25235543] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Revised: 11/22/2020] [Accepted: 11/23/2020] [Indexed: 12/12/2022] Open
Abstract
Filamins (FLN) are a family of actin-binding proteins involved in regulating the cytoskeleton and signaling phenomenon by developing a network with F-actin and FLN-binding partners. The FLN family comprises three conserved isoforms in mammals: FLNA, FLNB, and FLNC. FLNB is a multidomain monomer protein with domains containing an actin-binding N-terminal domain (ABD 1-242), encompassing two calponin-homology domains (assigned CH1 and CH2). Primary variants in FLNB mostly occur in the domain (CH2) and surrounding the hinge-1 region. The four autosomal dominant disorders that are associated with FLNB variants are Larsen syndrome, atelosteogenesis type I (AOI), atelosteogenesis type III (AOIII), and boomerang dysplasia (BD). Despite the intense clustering of FLNB variants contributing to the LS-AO-BD disorders, the genotype-phenotype correlation is still enigmatic. In silico prediction tools and molecular dynamics simulation (MDS) approaches have offered the potential for variant classification and pathogenicity predictions. We retrieved 285 FLNB missense variants from the UniProt, ClinVar, and HGMD databases in the current study. Of these, five and 39 variants were located in the CH1 and CH2 domains, respectively. These variants were subjected to various pathogenicity and stability prediction tools, evolutionary and conservation analyses, and biophysical and physicochemical properties analyses. Molecular dynamics simulation (MDS) was performed on the three candidate variants in the CH2 domain (W148R, F161C, and L171R) that were predicted to be the most pathogenic. The MDS analysis results showed that these three variants are highly compact compared to the native protein, suggesting that they could affect the protein on the structural and functional levels. The computational approach demonstrates the differences between the FLNB mutants and the wild type in a structural and functional context. Our findings expand our knowledge on the genotype-phenotype correlation in FLNB-related LS-AO-BD disorders on the molecular level, which may pave the way for optimizing drug therapy by integrating precision medicine.
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Affiliation(s)
- Udhaya Kumar S.
- School of Biosciences and Technology, Vellore Institute of Technology, Vellore, Tamil Nadu 632014, India; (U.K.S.); (S.S.); (T.K.D.)
| | - Srivarshini Sankar
- School of Biosciences and Technology, Vellore Institute of Technology, Vellore, Tamil Nadu 632014, India; (U.K.S.); (S.S.); (T.K.D.)
| | - Salma Younes
- Department of Biomedical Sciences, College of Health and Sciences, Qatar University, QU Health, Doha 2713, Qatar; (S.Y.); (M.N.A.); (S.S.O.)
| | - Thirumal Kumar D.
- School of Biosciences and Technology, Vellore Institute of Technology, Vellore, Tamil Nadu 632014, India; (U.K.S.); (S.S.); (T.K.D.)
| | - Muneera Naseer Ahmad
- Department of Biomedical Sciences, College of Health and Sciences, Qatar University, QU Health, Doha 2713, Qatar; (S.Y.); (M.N.A.); (S.S.O.)
| | - Sarah Samer Okashah
- Department of Biomedical Sciences, College of Health and Sciences, Qatar University, QU Health, Doha 2713, Qatar; (S.Y.); (M.N.A.); (S.S.O.)
| | - Balu Kamaraj
- Department of Neuroscience Technology, College of Applied Medical Sciences in Jubail, Imam Abdulrahman Bin Faisal University, Jubail 35816, Saudi Arabia;
| | - Abeer Mohammed Al-Subaie
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, Imam Abdulrahman Bin Faisal University, Dammam 31441, Saudi Arabia;
| | - George Priya Doss C.
- School of Biosciences and Technology, Vellore Institute of Technology, Vellore, Tamil Nadu 632014, India; (U.K.S.); (S.S.); (T.K.D.)
| | - Hatem Zayed
- Department of Biomedical Sciences, College of Health and Sciences, Qatar University, QU Health, Doha 2713, Qatar; (S.Y.); (M.N.A.); (S.S.O.)
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5
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Novoseletskaya E, Grigorieva O, Nimiritsky P, Basalova N, Eremichev R, Milovskaya I, Kulebyakin K, Kulebyakina M, Rodionov S, Omelyanenko N, Efimenko A. Mesenchymal Stromal Cell-Produced Components of Extracellular Matrix Potentiate Multipotent Stem Cell Response to Differentiation Stimuli. Front Cell Dev Biol 2020; 8:555378. [PMID: 33072743 PMCID: PMC7536557 DOI: 10.3389/fcell.2020.555378] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Accepted: 08/31/2020] [Indexed: 12/13/2022] Open
Abstract
Extracellular matrix (ECM) provides both structural support and dynamic microenvironment for cells regulating their behavior and fate. As a critical component of stem cell niche ECM maintains stem cells and activates their proliferation and differentiation under specific stimuli. Mesenchymal stem/stromal cells (MSCs) regulate tissue-specific stem cell functions locating in their immediate microenvironment and producing various bioactive factors, including ECM components. We evaluated the ability of MSC-produced ECM to restore stem and progenitor cell microenvironment in vitro and analyzed the possible mechanisms of its effects. Human MSC cell sheets were decellularized by different agents (detergents, enzymes, and apoptosis inductors) to select the optimized combination (CHAPS and DNAse I) based on the conservation of decellularized ECM (dECM) structure and effectiveness of DNA removal. Prepared dECM was non-immunogenic, supported MSC proliferation and formation of larger colonies in colony-forming unit-assay. Decellularized ECM effectively promoted MSC trilineage differentiation (adipogenic, osteogenic, and chondrogenic) compared to plastic or plastic covered by selected ECM components (collagen, fibronectin, laminin). Interestingly, dECM produced by human fibroblasts could not enhance MSC differentiation like MSC-produced dECM, indicating cell-specific functionality of dECM. We demonstrated the significant integrin contribution in dECM-cell interaction by blocking the stimulatory effects of dECM with RGD peptide and suggested the involvement of key intracellular signaling pathways activation (pERK/ERK and pFAK/FAK axes, pYAP/YAP and beta-catenin) in the observed processes based on the results of inhibitory analysis. Taken together, we suppose that MSC-produced dECM may mimic stem cell niche components in vitro and maintain multipotent progenitor cells to insure their effective response to external differentiating stimuli upon activation. The obtained data provide more insights into the possible role of MSC-produced ECM in stem and progenitor cell regulation within their niches. Our results are also useful for the developing of dECM-based cell-free products for regenerative medicine.
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Affiliation(s)
- Ekaterina Novoseletskaya
- Institute for Regenerative Medicine, Medical Research and Education Center, Lomonosov Moscow State University, Moscow, Russia.,Faculty of Medicine, Lomonosov Moscow State University, Moscow, Russia
| | - Olga Grigorieva
- Institute for Regenerative Medicine, Medical Research and Education Center, Lomonosov Moscow State University, Moscow, Russia
| | - Peter Nimiritsky
- Institute for Regenerative Medicine, Medical Research and Education Center, Lomonosov Moscow State University, Moscow, Russia.,Faculty of Medicine, Lomonosov Moscow State University, Moscow, Russia
| | - Nataliya Basalova
- Institute for Regenerative Medicine, Medical Research and Education Center, Lomonosov Moscow State University, Moscow, Russia.,Faculty of Medicine, Lomonosov Moscow State University, Moscow, Russia
| | - Roman Eremichev
- Institute for Regenerative Medicine, Medical Research and Education Center, Lomonosov Moscow State University, Moscow, Russia
| | - Irina Milovskaya
- Faculty of Biology, Lomonosov Moscow State University, Moscow, Russia
| | - Konstantin Kulebyakin
- Institute for Regenerative Medicine, Medical Research and Education Center, Lomonosov Moscow State University, Moscow, Russia.,Faculty of Medicine, Lomonosov Moscow State University, Moscow, Russia
| | - Maria Kulebyakina
- Faculty of Medicine, Lomonosov Moscow State University, Moscow, Russia
| | - Sergei Rodionov
- N.N. Priorov National Medical Research Center of Traumatology and Orthopedics, Moscow, Russia
| | - Nikolai Omelyanenko
- N.N. Priorov National Medical Research Center of Traumatology and Orthopedics, Moscow, Russia
| | - Anastasia Efimenko
- Institute for Regenerative Medicine, Medical Research and Education Center, Lomonosov Moscow State University, Moscow, Russia.,Faculty of Medicine, Lomonosov Moscow State University, Moscow, Russia
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Wen X, Zhang X, Hu Y, Xu J, Wang T, Yin S. iTRAQ-based quantitative proteomic analysis of Takifugu fasciatus liver in response to low-temperature stress. J Proteomics 2019; 201:27-36. [PMID: 30954612 DOI: 10.1016/j.jprot.2019.04.004] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2018] [Revised: 03/25/2019] [Accepted: 04/03/2019] [Indexed: 10/27/2022]
Abstract
Low temperatures profoundly influence the physiological and behavioural processes of ectotherms, especially teleosts, which have made them the subjects of strong interest over time. However, the characteristics of fish cold-tolerance at the protein level remain unclear. Therefore, to shed further light on the molecular mechanisms of low temperature adaptation in fish, we conducted quantitative proteomics on the T. fasciatus liver using iTRAQ. Comparing the proteomic profiles of the T. fasciatus liver at 12 °C and 26 °C, a total of 3741 proteins were identified, and 160 were differentially abundant proteins (DAPs). Among the DAPs, the most significant changes were noted in proteins involved in oxidative stress (nine proteins), mitochondrial enzymes (eleven proteins) and signal transduction (thirteen proteins). The KEGG enrichment analysis indicated significant enhancement of D-arginine and D-ornithine metabolism, MAPK signalling, Wnt signalling and Gap junction pathway. Subsequently, three significantly up-regulated proteins (CIRB, HSP90 and GST) and two significantly down-regulated proteins (FLNB and A2ML1) were validated with parallel reaction monitoring (PRM) assays. Furthermore, the changes in abundance of proteins that are involved in oxidative stress, mitochondrial enzymes and signal transduction were validated at the transcriptional level with qPCR. These verification results show that the experimental data of iTRAQ are reliable. Our results not only deepen the understanding of the mechanisms underlying low-temperature tolerance in fish, but they also may contribute to the enhancement of cold tolerance during its breeding process. SIGNIFICANCE OF THE STUDY: The study focused on a comparative quantitative proteomics analysis of the T. fasciatus liver in response to low temperatures using iTRAQ, which has not yet been reported in the literatures. The results showed that the effect of low temperature on T. fasciatus is significant, including a detoxification of metabolic by-products and oxidative stress, an activation of the mitochondrial enzyme to strengthen energy metabolism, and a negative effect on signal transduction, which result in dysfunction or suboptimal performance. These low-temperature-related changes in the liver proteome of T. fasciatus can facilitate the understanding of the low temperature-related response that takes place in similar conditions in the liver and may contribute to the breeding of cold-resistant strains.
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Affiliation(s)
- Xin Wen
- College of Life Sciences, College of Marine Science and Engineering, Nanjing Normal University, Nanjing 210023, China; Co-Innovation Center for Marine Bio-Industry Technology of Jiangsu Province, Lianyungang, Jiangsu 222005, China
| | - Xinyu Zhang
- College of Life Sciences, College of Marine Science and Engineering, Nanjing Normal University, Nanjing 210023, China; Co-Innovation Center for Marine Bio-Industry Technology of Jiangsu Province, Lianyungang, Jiangsu 222005, China
| | - Yadong Hu
- College of Life Sciences, College of Marine Science and Engineering, Nanjing Normal University, Nanjing 210023, China; Co-Innovation Center for Marine Bio-Industry Technology of Jiangsu Province, Lianyungang, Jiangsu 222005, China
| | - Jiejie Xu
- College of Life Sciences, College of Marine Science and Engineering, Nanjing Normal University, Nanjing 210023, China; Co-Innovation Center for Marine Bio-Industry Technology of Jiangsu Province, Lianyungang, Jiangsu 222005, China
| | - Tao Wang
- College of Life Sciences, College of Marine Science and Engineering, Nanjing Normal University, Nanjing 210023, China; Co-Innovation Center for Marine Bio-Industry Technology of Jiangsu Province, Lianyungang, Jiangsu 222005, China.
| | - Shaowu Yin
- College of Life Sciences, College of Marine Science and Engineering, Nanjing Normal University, Nanjing 210023, China; Co-Innovation Center for Marine Bio-Industry Technology of Jiangsu Province, Lianyungang, Jiangsu 222005, China.
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Xu Q, Wu N, Cui L, Lin M, Thirumal Kumar D, George Priya Doss C, Wu Z, Shen J, Song X, Qiu G. Comparative analysis of the two extremes of FLNB-mutated autosomal dominant disease spectrum: from clinical phenotypes to cellular and molecular findings. Am J Transl Res 2018; 10:1400-1412. [PMID: 29887954 PMCID: PMC5992551] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2018] [Accepted: 04/18/2018] [Indexed: 06/08/2023]
Abstract
Non-randomly distributed missense mutations of Filamin B (FLNB) can lead to a spectrum of autosomal dominant-inherited skeletal malformations caused by bone hypoplasia, including Larsen syndrome (LS), atelosteogenesi-I (AO-I), atelosteogenesi-I (AO-III) and boomerang dysplasia (BD). Among this spectrum of diseases, LS causes a milder hypoplasia of the skeletal system, compared to BD's much more severe symptoms. Previous studies revealed limited molecular mechanisms of FLNB-related diseases but most of them were carried out with HEK293 cells from the kidney which could not reproduce FLNB's specificity to skeletal tissues. Instead, we elected to use ATDC5, a chondrogenic stem cell line widely used to study endochondral osteogenesis. In this study, we established FLNB-transfected ATDC5 cell model. We reported a pedigree of LS with mutation of FLNBG1586R and reviewed a case of BD with mutation of FLNBL171R . Using the ATDC5 cell model above, we compared cellular and molecular phenotypes of BD-associated FLNBL171R and LS-associated FLNBG1586R . We found that while both phenotypes had an increased expression of Runx2, FLNBL171R-expressing ATDC5 cells presented globular aggregation of FLNB protein and increased cellular apoptosis rate while FLNBG1586R-expressing ATDC5 cells presented evenly distributed FLNB protein and decreased cellular migration. These findings support our explanation for the cause of differences in clinical phenotypes between LS and BD. Our study makes a comparative analysis of two extremes of the FLNB-mutated autosomal dominant spectrum, relating known clinical phenotypes to our new cellular and molecular findings. These results indicated next steps for future research on the role of FLNB in the physiological process of endochondral osteogenesis.
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Affiliation(s)
- Qiming Xu
- Department of Orthopedic Surgery, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical SciencesBeijing, China
| | - Nan Wu
- Department of Orthopedic Surgery, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical SciencesBeijing, China
- Beijing Key Laboratory for Genetic Research of Skeletal DeformityBeijing, China
- Medical Research Center of Orthopedics, Chinese Academy of Medical SciencesBeijing, China
| | - Lijia Cui
- Department of Endocrinology, Peking Union Medical College HospitalBeijing, China
| | - Mao Lin
- Department of Orthopedic Surgery, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical SciencesBeijing, China
| | - D Thirumal Kumar
- Department of Integrative Biology, Vellore Institute of TechnologyVellore, India
| | - C George Priya Doss
- Department of Integrative Biology, Vellore Institute of TechnologyVellore, India
| | - Zhihong Wu
- Department of Central Laboratory, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical SciencesBeijing, China
- Beijing Key Laboratory for Genetic Research of Skeletal DeformityBeijing, China
- Medical Research Center of Orthopedics, Chinese Academy of Medical SciencesBeijing, China
| | - Jianxiong Shen
- Department of Orthopedic Surgery, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical SciencesBeijing, China
- Beijing Key Laboratory for Genetic Research of Skeletal DeformityBeijing, China
- Medical Research Center of Orthopedics, Chinese Academy of Medical SciencesBeijing, China
| | - Xiangjian Song
- Department of Pediatric Orthopedics, Zhengzhou Orthopedic HospitalZhengzhou, Henan, China
| | - Guixing Qiu
- Department of Orthopedic Surgery, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical SciencesBeijing, China
- Beijing Key Laboratory for Genetic Research of Skeletal DeformityBeijing, China
- Medical Research Center of Orthopedics, Chinese Academy of Medical SciencesBeijing, China
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8
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Li Y, Sun Y, Sun F, Hua R, Li C, Chen L, Guo D, Mu J. Mechanisms and Effects on HBV Replication of the Interaction between HBV Core Protein and Cellular Filamin B. Virol Sin 2018; 33:162-172. [PMID: 29594956 DOI: 10.1007/s12250-018-0023-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2017] [Accepted: 01/12/2018] [Indexed: 02/06/2023] Open
Abstract
Hepatitis B virus (HBV) infection is one of the major problems that threatens global health. There have been many studies on HBV, but the relationship between HBV and host factors is largely unexplored and more studies are needed to clarify these interactions. Filamin B is an actin-binding protein that acts as a cytoskeleton protein, and it is involved in cell development and several signaling pathways. In this study, we showed that filamin B interacted with HBV core protein, and the interaction promoted HBV replication. The interaction between filamin B and core protein was observed in HEK 293T, Huh7 and HepG2 cell lines by co-immunoprecipitation and co-localization immnofluoresence. Overexpression of filamin B increased the levels of HBV total RNAs and pre-genome RNA (pgRNA), and improved the secretion level of hepatitis B surface antigen (HBsAg) and hepatitis B e antigen (HBeAg). In contrast, filamin B knockdown inhibited HBV replication, decreased the level of HBV total RNAs and pgRNA, and reduced the secretion level of HBsAg and HBeAg. In addition, we found that filamin B and core protein may interact with each other via four blocks of argentine residues at the C-terminus of core protein. In conclusion, we identify filamin B as a novel host factor that can interact with core protein to promote HBV replication in hepatocytes. Our study provides new insights into the relationship between HBV and host factors and may provide new strategies for the treatment of HBV infection.
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Affiliation(s)
- Yilin Li
- School of Basic Medical Sciences, Wuhan University, Wuhan, 430071, China
| | - Yishuang Sun
- State Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, 430071, China
| | - Fuyun Sun
- School of Basic Medical Sciences, Wuhan University, Wuhan, 430071, China
| | - Rong Hua
- School of Basic Medical Sciences, Wuhan University, Wuhan, 430071, China
| | - Chenlin Li
- School of Basic Medical Sciences, Wuhan University, Wuhan, 430071, China
| | - Lang Chen
- School of Basic Medical Sciences, Wuhan University, Wuhan, 430071, China
| | - Deyin Guo
- School of Basic Medical Sciences, Wuhan University, Wuhan, 430071, China. .,School of Basic Medicine (Shenzhen), Sun Yat-sen University, Guangzhou, 510081, China.
| | - Jingfang Mu
- State Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, 430071, China.
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9
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Glucocorticoids Induces Apoptosis in Chondrocytes Through the Regulation of 11β-Hydroxysteroid Dehydrogenases (11β-HSDs). Int J Pept Res Ther 2017. [DOI: 10.1007/s10989-017-9639-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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10
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Xu Q, Wu N, Cui L, Wu Z, Qiu G. Filamin B: The next hotspot in skeletal research? J Genet Genomics 2017; 44:335-342. [PMID: 28739045 DOI: 10.1016/j.jgg.2017.04.007] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Revised: 03/15/2017] [Accepted: 04/12/2017] [Indexed: 12/19/2022]
Abstract
Filamin B (FLNB) is a large dimeric actin-binding protein which crosslinks actin cytoskeleton filaments into a dynamic structure. Up to present, pathogenic mutations in FLNB are solely found to cause skeletal deformities, indicating the important role of FLNB in skeletal development. FLNB-related disorders are classified as spondylocarpotarsal synostosis (SCT), Larsen syndrome (LS), atelosteogenesis (AO), boomerang dysplasia (BD), and isolated congenital talipes equinovarus, presenting with scoliosis, short-limbed dwarfism, clubfoot, joint dislocation and other unique skeletal abnormalities. Several mechanisms of FLNB mutations causing skeletal malformations have been proposed, including delay of ossification in long bone growth plate, reduction of bone mineral density (BMD), dysregulation of muscle differentiation, ossification of intervertebral disc (IVD), disturbance of proliferation, differentiation and apoptosis in chondrocytes, impairment of angiogenesis, and hypomotility of osteoblast, chondrocyte and fibroblast. Interventions on FLNB-related diseases require prenatal surveillance by sonography, gene testing in high-risk carriers, and proper orthosis or orthopedic surgeries to correct malformations including scoliosis, cervical spine instability, large joint dislocation, and clubfoot. Gene and cell therapies for FLNB-related diseases are also promising but require further studies.
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Affiliation(s)
- Qiming Xu
- Department of Orthopaedic Surgery, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Nan Wu
- Department of Orthopaedic Surgery, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100730, China; Beijing Key Laboratory for Genetic Research of Skeletal Deformity, Beijing 100730, China; Medical Research Center of Orthopaedics, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Lijia Cui
- Peking Union Medical College Hospital, Beijing 100730, China; School of Medicine, Tsinghua University, Beijing 100084, China
| | - Zhihong Wu
- Beijing Key Laboratory for Genetic Research of Skeletal Deformity, Beijing 100730, China; Medical Research Center of Orthopaedics, Chinese Academy of Medical Sciences, Beijing 100730, China; Department of Central Laboratory, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Guixing Qiu
- Department of Orthopaedic Surgery, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100730, China; Beijing Key Laboratory for Genetic Research of Skeletal Deformity, Beijing 100730, China; Medical Research Center of Orthopaedics, Chinese Academy of Medical Sciences, Beijing 100730, China.
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11
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Hu J, Lu J, Goyal A, Wong T, Lian G, Zhang J, Hecht JL, Feng Y, Sheen VL. Opposing FlnA and FlnB interactions regulate RhoA activation in guiding dynamic actin stress fiber formation and cell spreading. Hum Mol Genet 2017; 26:1294-1304. [PMID: 28175289 DOI: 10.1093/hmg/ddx047] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2016] [Accepted: 02/02/2017] [Indexed: 12/26/2022] Open
Abstract
Filamins are a family of actin-binding proteins responsible for diverse biological functions in the context of regulating actin dynamics and vesicle trafficking. Disruption of these proteins has been implicated in multiple human developmental disorders. To investigate the roles of different filamin isoforms, we focused on FlnA and FlnB interactions in the cartilage growth plate, since mutations in both molecules cause chondrodysplasias. Current studies show that FlnA and FlnB share a common function in stabilizing the actin cytoskeleton, they physically interact in the cytoplasm of chondrocytes, and loss of FlnA enhances FlnB expression of chondrocytes in the growth plate (and vice versa), suggesting compensation. Prolonged FlnB loss, however, promotes actin-stress fiber formation following plating onto an integrin activating substrate whereas FlnA inhibition leads to decreased actin formation. FlnA more strongly binds RhoA, although both filamins overlap with RhoA expression in the cell cytoplasm. FlnA promotes RhoA activation whereas FlnB indirectly inhibits this pathway. Moreover, FlnA loss leads to diminished expression of β1-integrin, whereas FlnB loss promotes integrin expression. Finally, fibronectin mediated integrin activation has been shown to activate RhoA and activated RhoA leads to stress fiber formation and cell spreading. Fibronectin stimulation in null FlnA cells impairs enhanced spreading whereas FlnB inhibited cells show enhanced spreading. While filamins serve a primary static function in stabilization of the actin cytoskeleton, these studies are the first to demonstrate a dynamic and antagonistic relationship between different filamin isoforms in the dynamic regulation of integrin expression, RhoGTPase activity and actin stress fiber remodeling.
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Affiliation(s)
- Jianjun Hu
- Department of Neurology, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA 02115, USA
| | - Jie Lu
- Department of Neurology, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA 02115, USA
| | - Akshay Goyal
- Department of Neurology, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA 02115, USA
| | - Timothy Wong
- Department of Neurology, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA 02115, USA
| | - Gewei Lian
- Department of Neurology, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA 02115, USA
| | - Jingping Zhang
- Department of Neurology, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA 02115, USA
| | - Jonathan L Hecht
- Department of Pathology, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA 02115, USA
| | - Yuanyi Feng
- Department of Neurology, Northwestern University Feinberg School of Medicine, Chicago, IL 60611, USA
| | - Volney L Sheen
- Department of Neurology, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA 02115, USA
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12
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Zhang T, Zhang X, Han K, Zhang G, Wang J, Xie K, Xue Q, Fan X. Analysis of long noncoding RNA and mRNA using RNA sequencing during the differentiation of intramuscular preadipocytes in chicken. PLoS One 2017; 12:e0172389. [PMID: 28199418 PMCID: PMC5310915 DOI: 10.1371/journal.pone.0172389] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2016] [Accepted: 02/03/2017] [Indexed: 02/04/2023] Open
Abstract
Long noncoding RNAs (lncRNAs) regulate metabolic tissue development and function, including adipogenesis. However, little is known about the function and profile of lncRNAs in intramuscular preadipocyte differentiation in chicken. Here, we identified lncRNAs in chicken intramuscular preadipocytes at different differentiation stages using RNA sequencing. A total of 1,311,382,604 clean reads and 25,435 lncRNAs were obtained from 12 samples. In total, 7,433 differentially expressed genes (4,698 lncRNAs and 2,735 mRNAs) were identified by pairwise comparison. These 7,433 differentially expressed genes were grouped into 11 clusters based on their expression patterns by K-means clustering. Using Weighted Gene Coexpression Network Analysis, we identified four stage-specific modules positively related to I0, I2, I4, and I6 stages and two stage-specific modules negatively related to I0 and I2 stages, respectively. Many well-known and novel pathways associated with intramuscular preadipocyte differentiation were identified. We also identified hub genes in each stage-specific module and visualized them in Cytoscape. Our analysis revealed many highly-connected genes, including XLOC_058593, BMP3, MYOD1, and LAMP3. This study provides a valuable resource for chicken lncRNA study and improves our understanding of the biology of preadipocyte differentiation in chicken.
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Affiliation(s)
- Tao Zhang
- College of Animal Science and Technology, Yangzhou University, Yangzhou, Jiangsu, China
- Key Laboratory for Animal Genetics, Breeding, Reproduction and Molecular Design of Jiangsu Province, Yangzhou, Jiangsu, China
| | - Xiangqian Zhang
- College of Animal Science and Technology, Yangzhou University, Yangzhou, Jiangsu, China
- Key Laboratory for Animal Genetics, Breeding, Reproduction and Molecular Design of Jiangsu Province, Yangzhou, Jiangsu, China
| | - Kunpeng Han
- College of Animal Science and Technology, Yangzhou University, Yangzhou, Jiangsu, China
- Key Laboratory for Animal Genetics, Breeding, Reproduction and Molecular Design of Jiangsu Province, Yangzhou, Jiangsu, China
| | - Genxi Zhang
- College of Animal Science and Technology, Yangzhou University, Yangzhou, Jiangsu, China
- Key Laboratory for Animal Genetics, Breeding, Reproduction and Molecular Design of Jiangsu Province, Yangzhou, Jiangsu, China
| | - Jinyu Wang
- College of Animal Science and Technology, Yangzhou University, Yangzhou, Jiangsu, China
- Key Laboratory for Animal Genetics, Breeding, Reproduction and Molecular Design of Jiangsu Province, Yangzhou, Jiangsu, China
- * E-mail:
| | - Kaizhou Xie
- College of Animal Science and Technology, Yangzhou University, Yangzhou, Jiangsu, China
- Key Laboratory for Animal Genetics, Breeding, Reproduction and Molecular Design of Jiangsu Province, Yangzhou, Jiangsu, China
| | - Qian Xue
- College of Animal Science and Technology, Yangzhou University, Yangzhou, Jiangsu, China
- Key Laboratory for Animal Genetics, Breeding, Reproduction and Molecular Design of Jiangsu Province, Yangzhou, Jiangsu, China
| | - Xiaomei Fan
- Vazyme Biotech Co.,Ltd., Economic and Technological Development Zone, Nanjing, Jiangsu, China
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13
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Three novel missense mutations in the filamin B gene are associated with isolated congenital talipes equinovarus. Hum Genet 2016; 135:1181-9. [DOI: 10.1007/s00439-016-1701-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2016] [Accepted: 06/21/2016] [Indexed: 12/30/2022]
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14
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Zieba J, Forlenza KN, Khatra JS, Sarukhanov A, Duran I, Rigueur D, Lyons KM, Cohn DH, Merrill AE, Krakow D. TGFβ and BMP Dependent Cell Fate Changes Due to Loss of Filamin B Produces Disc Degeneration and Progressive Vertebral Fusions. PLoS Genet 2016; 12:e1005936. [PMID: 27019229 PMCID: PMC4809497 DOI: 10.1371/journal.pgen.1005936] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2015] [Accepted: 02/24/2016] [Indexed: 12/02/2022] Open
Abstract
Spondylocarpotarsal synostosis (SCT) is an autosomal recessive disorder characterized by progressive vertebral fusions and caused by loss of function mutations in Filamin B (FLNB). FLNB acts as a signaling scaffold by linking the actin cytoskleteon to signal transduction systems, yet the disease mechanisms for SCT remain unclear. Employing a Flnb knockout mouse, we found morphologic and molecular evidence that the intervertebral discs (IVDs) of Flnb–/–mice undergo rapid and progressive degeneration during postnatal development as a result of abnormal cell fate changes in the IVD, particularly the annulus fibrosus (AF). In Flnb–/–mice, the AF cells lose their typical fibroblast-like characteristics and acquire the molecular and phenotypic signature of hypertrophic chondrocytes. This change is characterized by hallmarks of endochondral-like ossification including alterations in collagen matrix, expression of Collagen X, increased apoptosis, and inappropriate ossification of the disc tissue. We show that conversion of the AF cells into chondrocytes is coincident with upregulated TGFβ signaling via Smad2/3 and BMP induced p38 signaling as well as sustained activation of canonical and noncanonical target genes p21 and Ctgf. These findings indicate that FLNB is involved in attenuation of TGFβ/BMP signaling and influences AF cell fate. Furthermore, we demonstrate that the IVD disruptions in Flnb–/–mice resemble aging degenerative discs and reveal new insights into the molecular causes of vertebral fusions and disc degeneration. Whereas there is a large foundation of knowledge concerning skeletal formation and development, identifying the molecular changes behind Intervertebral Disc (IVD) aging and degeneration has been a challenge. The loss of Filamin B, a protein component of the cell’s cytoskeletal structure, gives rise to Spondylocarpotarsal Synostosis, a rare genetic disorder characterized by fusions of the vertebral bodies. Similarly, mice lacking the Filamin B protein show fusions of the vertebral bodies. We found that these fusions are caused by the early degeneration and eventual ossification of the IVDs. Our study demonstrates that this degeneration is caused by the increase in TGFβ and BMP activity, developmental pathways essential in bone and cartilage formation. These findings represent a significant step forward in our understanding of the molecular basis of IVD degeneration. as well as revealing filamin B’s role in TGFβ/BMP signaling regulation. Moreover, we demonstrate that the study of the rare disease spondylocarpotarsal synostosis in a model organism can uncover mechanisms underlying more common diseases. Finally, our findings provide a model system that will facilitate further discoveries regarding disc degeneration, which affects a significant proportion of the population.
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Affiliation(s)
- Jennifer Zieba
- Department of Human Genetics, David Geffen School of Medicine at the University of California at Los Angeles, Los Angeles, California, United States of America
- Department of Orthopaedic Surgery, David Geffen School of Medicine at the University of California at Los Angeles, Los Angeles, California, United States of America
| | - Kimberly Nicole Forlenza
- Department of Orthopaedic Surgery, David Geffen School of Medicine at the University of California at Los Angeles, Los Angeles, California, United States of America
| | - Jagteshwar Singh Khatra
- Department of Orthopaedic Surgery, David Geffen School of Medicine at the University of California at Los Angeles, Los Angeles, California, United States of America
| | - Anna Sarukhanov
- Department of Orthopaedic Surgery, David Geffen School of Medicine at the University of California at Los Angeles, Los Angeles, California, United States of America
| | - Ivan Duran
- Department of Orthopaedic Surgery, David Geffen School of Medicine at the University of California at Los Angeles, Los Angeles, California, United States of America
| | - Diana Rigueur
- Department of Molecular, Cell, and Developmental Biology, University of California at Los Angeles, Los Angeles, California, United States of America
| | - Karen M. Lyons
- Department of Orthopaedic Surgery, David Geffen School of Medicine at the University of California at Los Angeles, Los Angeles, California, United States of America
- Department of Molecular, Cell, and Developmental Biology, University of California at Los Angeles, Los Angeles, California, United States of America
| | - Daniel H. Cohn
- Department of Orthopaedic Surgery, David Geffen School of Medicine at the University of California at Los Angeles, Los Angeles, California, United States of America
- Department of Molecular, Cell, and Developmental Biology, University of California at Los Angeles, Los Angeles, California, United States of America
| | - Amy E. Merrill
- Center for Craniofacial Molecular Biology, Ostrow School of Dentistry, University of Southern California, Los Angeles, California, United States of America
- Department of Biochemistry and Molecular Biology, Keck School of Medicine, University of Southern California, Los Angeles, California, United States of America
| | - Deborah Krakow
- Department of Human Genetics, David Geffen School of Medicine at the University of California at Los Angeles, Los Angeles, California, United States of America
- Department of Orthopaedic Surgery, David Geffen School of Medicine at the University of California at Los Angeles, Los Angeles, California, United States of America
- Department of Obstetrics and Gynecology, David Geffen School of Medicine at the University of California at Los Angeles, Los Angeles, California, United States of America
- * E-mail:
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15
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Zhao Y, Shapiro SS, Eto M. F-actin clustering and cell dysmotility induced by the pathological W148R missense mutation of filamin B at the actin-binding domain. Am J Physiol Cell Physiol 2015; 310:C89-98. [PMID: 26491051 DOI: 10.1152/ajpcell.00274.2015] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2015] [Accepted: 10/19/2015] [Indexed: 11/22/2022]
Abstract
Filamin B (FLNB) is a dimeric actin-binding protein that orchestrates the reorganization of the actin cytoskeleton. Congenital mutations of FLNB at the actin-binding domain (ABD) are known to cause abnormalities of skeletal development, such as atelosteogenesis types I and III and Larsen's syndrome, although the underlying mechanisms are poorly understood. Here, using fluorescence microscopy, we characterized the reorganization of the actin cytoskeleton in cells expressing each of six pathological FLNB mutants that have been linked to skeletal abnormalities. The subfractionation assay showed a greater accumulation of the FLNB ABD mutants W148R and E227K than the wild-type protein to the cytoskeleton. Ectopic expression of FLNB-W148R and, to a lesser extent, FLNB-E227K induced prominent F-actin accumulations and the consequent rearrangement of focal adhesions, myosin II, and septin filaments and results in a delayed directional migration of the cells. The W148R protein-induced cytoskeletal rearrangement was partially attenuated by the inhibition of myosin II, p21-activated protein kinase, or Rho-associated protein kinase. The expression of a single-head ABD fragment with the mutations partially mimicked the rearrangement induced by the dimer. The F-actin clustering through the interaction with the mutant FLNB ABD may limit the cytoskeletal reorganization, preventing normal skeletal development.
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Affiliation(s)
- Yongtong Zhao
- Department of Molecular Physiology and Biophysics, Sidney Kimmel Medical College at Thomas Jefferson University, and Sidney Kimmel Cancer Center, Philadelphia, Pennsylvania
| | - Sandor S Shapiro
- Department of Molecular Physiology and Biophysics, Sidney Kimmel Medical College at Thomas Jefferson University, and Sidney Kimmel Cancer Center, Philadelphia, Pennsylvania
| | - Masumi Eto
- Department of Molecular Physiology and Biophysics, Sidney Kimmel Medical College at Thomas Jefferson University, and Sidney Kimmel Cancer Center, Philadelphia, Pennsylvania
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16
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Nanjappa V, Renuse S, Sathe GJ, Raja R, Syed N, Radhakrishnan A, Subbannayya T, Patil A, Marimuthu A, Sahasrabuddhe NA, Guerrero-Preston R, Somani BL, Nair B, Kundu GC, Prasad TK, Califano JA, Gowda H, Sidransky D, Pandey A, Chatterjee A. Chronic exposure to chewing tobacco selects for overexpression of stearoyl-CoA desaturase in normal oral keratinocytes. Cancer Biol Ther 2015; 16:1593-603. [PMID: 26391970 PMCID: PMC4846103 DOI: 10.1080/15384047.2015.1078022] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2015] [Revised: 06/24/2015] [Accepted: 07/26/2015] [Indexed: 01/10/2023] Open
Abstract
Chewing tobacco is a common practice in certain socio-economic sections of southern Asia, particularly in the Indian subcontinent and has been well associated with head and neck squamous cell carcinoma. The molecular mechanisms of chewing tobacco which leads to malignancy remains unclear. In large majority of studies, short-term exposure to tobacco has been evaluated. From a biological perspective, however, long-term (chronic) exposure to tobacco mimics the pathogenesis of oral cancer more closely. We developed a cell line model to investigate the chronic effects of chewing tobacco. Chronic exposure to tobacco resulted in higher cellular proliferation and invasive ability of the normal oral keratinocytes (OKF6/TERT1). We carried out quantitative proteomic analysis of OKF6/TERT1 cells chronically treated with chewing tobacco compared to the untreated cells. We identified a total of 3,636 proteins among which expression of 408 proteins were found to be significantly altered. Among the overexpressed proteins, stearoyl-CoA desaturase (SCD) was found to be 2.6-fold overexpressed in the tobacco treated cells. Silencing/inhibition of SCD using its specific siRNA or inhibitor led to a decrease in cellular proliferation, invasion and colony forming ability of not only the tobacco treated cells but also in a panel of head and neck cancer cell lines. These findings suggest that chronic exposure to chewing tobacco induced carcinogenesis in non-malignant oral epithelial cells and SCD plays an essential role in this process. The current study provides evidence that SCD can act as a potential therapeutic target in head and neck squamous cell carcinoma, especially in patients who are users of tobacco.
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Affiliation(s)
- Vishalakshi Nanjappa
- Institute of Bioinformatics; International Technology Park; Bangalore, India
- Amrita School of Biotechnology; Amrita University; Kollam, India
| | - Santosh Renuse
- Institute of Bioinformatics; International Technology Park; Bangalore, India
- Amrita School of Biotechnology; Amrita University; Kollam, India
| | - Gajanan J Sathe
- Institute of Bioinformatics; International Technology Park; Bangalore, India
- Manipal University; Madhav Nagar; Manipal, India
| | - Remya Raja
- Institute of Bioinformatics; International Technology Park; Bangalore, India
| | - Nazia Syed
- Institute of Bioinformatics; International Technology Park; Bangalore, India
- Department of Biochemistry and Molecular Biology; Pondicherry University; Puducherry, India
| | - Aneesha Radhakrishnan
- Institute of Bioinformatics; International Technology Park; Bangalore, India
- Department of Biochemistry and Molecular Biology; Pondicherry University; Puducherry, India
| | - Tejaswini Subbannayya
- Institute of Bioinformatics; International Technology Park; Bangalore, India
- Amrita School of Biotechnology; Amrita University; Kollam, India
| | - Arun Patil
- Institute of Bioinformatics; International Technology Park; Bangalore, India
- School of Biotechnology; KIIT University; Bhubaneswar, India
| | | | | | - Rafael Guerrero-Preston
- Department of Otolaryngology-Head and Neck Surgery; Johns Hopkins University School of Medicine; Baltimore, MD USA
| | - Babu L Somani
- Institute of Bioinformatics; International Technology Park; Bangalore, India
| | - Bipin Nair
- Amrita School of Biotechnology; Amrita University; Kollam, India
| | - Gopal C Kundu
- National Center for Cell Science (NCCS); NCCS Complex; Pune, India
| | - T Keshava Prasad
- Institute of Bioinformatics; International Technology Park; Bangalore, India
- Amrita School of Biotechnology; Amrita University; Kollam, India
- YU-IOB Center for Systems Biology and Molecular Medicine; Yenepoya University; Mangalore, India
| | - Joseph A Califano
- Department of Otolaryngology-Head and Neck Surgery; Johns Hopkins University School of Medicine; Baltimore, MD USA
- Milton J. Dance Head and Neck Center; Greater Baltimore Medical Center; Baltimore, MD USA
| | - Harsha Gowda
- Institute of Bioinformatics; International Technology Park; Bangalore, India
- YU-IOB Center for Systems Biology and Molecular Medicine; Yenepoya University; Mangalore, India
| | - David Sidransky
- Department of Otolaryngology-Head and Neck Surgery; Johns Hopkins University School of Medicine; Baltimore, MD USA
| | - Akhilesh Pandey
- McKusick-Nathans Institute of Genetic Medicine; Johns Hopkins University School of Medicine; Baltimore, MD USA
- Department of Biological Chemistry; Johns Hopkins University School of Medicine; Baltimore, MD USA
- Department of Pathology; Johns Hopkins University School of Medicine; Baltimore, MD USA
| | - Aditi Chatterjee
- Institute of Bioinformatics; International Technology Park; Bangalore, India
- YU-IOB Center for Systems Biology and Molecular Medicine; Yenepoya University; Mangalore, India
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17
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Hu J, Lu J, Lian G, Ferland RJ, Dettenhofer M, Sheen VL. Formin 1 and filamin B physically interact to coordinate chondrocyte proliferation and differentiation in the growth plate. Hum Mol Genet 2014; 23:4663-73. [PMID: 24760772 DOI: 10.1093/hmg/ddu186] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Filamin B (FlnB) is an actin-binding protein thought to transduce signals from various membrane receptors and intracellular proteins onto the actin cytoskeleton. Formin1 (Fmn1) is an actin-nucleating protein, implicated in actin assembly and intracellular signaling. Human mutations in FLNB cause several skeletal disorders associated with dwarfism and early bone fusion. Mouse mutations in Fmn1 cause aberrant fusion of carpal digits. We report here that FlnB and Fmn1 physically interact, are co-expressed in chondrocytes in the growth plate and share overlapping expression in the cell cytoplasm and nucleus. Loss of FlnB leads to a dramatic decrease in Fmn1 expression at the hypertrophic-to-ossification border. Loss of Fmn1-FlnB in mice leads to a more severe reduction in body size, weight and growth plate length, than observed in mice following knockout of either gene alone. Shortening of the long bone is associated with a decrease in chondrocyte proliferation and an overall delay in ossification in the double-knockout mice. In contrast to FlnB null, Fmn1 loss results in a decrease in the width of the prehypertrophic zone. Loss of both proteins, however, causes an overall decrease in the width of the proliferation zone and an increase in the differentiated hypertrophic zone. The current findings suggest that Fmn1 and FlnB have shared and independent functions. FlnB loss promotes prehypertrophic differentiation whereas Fmn1 leads to a delay. Both proteins, however, regulate chondrocyte proliferation, and FlnB may regulate Fmn1 function at the hypertrophic-to-ossification border, thereby explaining the overall delay in ossification.
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Affiliation(s)
- Jianjun Hu
- Department of Neurology, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA 02115, USA
| | - Jie Lu
- Department of Neurology, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA 02115, USA
| | - Gewei Lian
- Department of Neurology, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA 02115, USA
| | - Russell J Ferland
- Center for Neuropharmacology and Neuroscience, Albany Medical College, Albany, NY 12208, USA
| | - Markus Dettenhofer
- CEITEC - Central European Institute of Technology, Masaryk University, Brno, Czech Republic
| | - Volney L Sheen
- Department of Neurology, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA 02115, USA
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