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Sampei C, Kato K, Arasaki Y, Kimura Y, Konno T, Otsuka K, Kohara Y, Noda M, Ezura Y, Hayata T. Gprc5a is a novel parathyroid hormone-inducible gene and negatively regulates osteoblast proliferation and differentiation. J Cell Physiol 2024. [PMID: 38769895 DOI: 10.1002/jcp.31297] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Revised: 04/18/2024] [Accepted: 05/02/2024] [Indexed: 05/22/2024]
Abstract
Teriparatide is a peptide derived from a parathyroid hormone (PTH) and an osteoporosis therapeutic drug with potent bone formation-promoting activity. To identify novel druggable genes that act downstream of PTH signaling and are potentially involved in bone formation, we screened PTH target genes in mouse osteoblast-like MC3T3-E1 cells. Here we show that Gprc5a, encoding an orphan G protein-coupled receptor, is a novel PTH-inducible gene and negatively regulates osteoblast proliferation and differentiation. PTH treatment induced Gprc5a expression in MC3T3-E1 cells, rat osteosarcoma ROS17/2.8 cells, and mouse femurs. Induction of Gprc5a expression by PTH occurred in the absence of protein synthesis and was mediated primarily via the cAMP pathway, suggesting that Gprc5a is a direct target of PTH signaling. Interestingly, Gprc5a expression was induced additively by co-treatment with PTH and 1α, 25-dihydroxyvitamin D3 (calcitriol), or retinoic acid in MC3T3-E1 cells. Reporter analysis of a 1 kb fragment of human GPRC5A promoter revealed that the promoter fragment showed responsiveness to PTH via the cAMP response element, suggesting that GPRC5A is also a PTH-inducible gene in humans. Gprc5a knockdown promoted cell viability and proliferation, as demonstrated by MTT and BrdU assays. Gprc5a knockdown also promoted osteoblast differentiation, as indicated by gene expression analysis and mineralization assay. Mechanistic studies showed that Gprc5a interacted with BMPR1A and suppressed BMP signaling induced by BMP-2 and constitutively active BMP receptors, ALK2 (ACVR1) Q207D and ALK3 (BMPR1A) Q233D. Thus, our results suggest that Gprc5a is a novel gene induced by PTH that acts in an inhibitory manner on both cell proliferation and osteoblast differentiation and is a candidate for drug targets for osteoporosis.
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Affiliation(s)
- Chisato Sampei
- Department of Molecular Pharmacology, Graduate School of Pharmaceutical Sciences and Faculty of Pharmaceutical Science, Tokyo University of Science, Noda, Chiba, Japan
| | - Kosuke Kato
- Department of Molecular Pharmacology, Graduate School of Pharmaceutical Sciences and Faculty of Pharmaceutical Science, Tokyo University of Science, Noda, Chiba, Japan
| | - Yasuhiro Arasaki
- Department of Molecular Pharmacology, Graduate School of Pharmaceutical Sciences and Faculty of Pharmaceutical Science, Tokyo University of Science, Noda, Chiba, Japan
| | - Yuta Kimura
- Department of Molecular Pharmacology, Graduate School of Pharmaceutical Sciences and Faculty of Pharmaceutical Science, Tokyo University of Science, Noda, Chiba, Japan
| | - Takuto Konno
- Department of Molecular Pharmacology, Graduate School of Pharmaceutical Sciences and Faculty of Pharmaceutical Science, Tokyo University of Science, Noda, Chiba, Japan
| | - Kanon Otsuka
- Department of Molecular Pharmacology, Graduate School of Pharmaceutical Sciences and Faculty of Pharmaceutical Science, Tokyo University of Science, Noda, Chiba, Japan
| | - Yukihiro Kohara
- Department of Molecular Pharmacology, Graduate School of Pharmaceutical Sciences and Faculty of Pharmaceutical Science, Tokyo University of Science, Noda, Chiba, Japan
| | - Masaki Noda
- Department of Molecular Pharmacology, Medical Research Institute, Tokyo Medical and Dental University (TMDU), Bunkyo-ku, Tokyo, Japan
- Center for Stem Cell and Regenerative Medicine, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo, Japan
| | - Yoichi Ezura
- Department of Molecular Pharmacology, Medical Research Institute, Tokyo Medical and Dental University (TMDU), Bunkyo-ku, Tokyo, Japan
- Department of Joint Surgery and Sports Medicine, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo, Japan
- Department of Occupational Therapy, Faculty of Health and Medical Science, Teikyo Heisei University, Toshima-ku, Japan
| | - Tadayoshi Hayata
- Department of Molecular Pharmacology, Graduate School of Pharmaceutical Sciences and Faculty of Pharmaceutical Science, Tokyo University of Science, Noda, Chiba, Japan
- Department of Molecular Pharmacology, Medical Research Institute, Tokyo Medical and Dental University (TMDU), Bunkyo-ku, Tokyo, Japan
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2
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Liu H, Liu L, Rosen CJ. PTH and the Regulation of Mesenchymal Cells within the Bone Marrow Niche. Cells 2024; 13:406. [PMID: 38474370 PMCID: PMC10930661 DOI: 10.3390/cells13050406] [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: 12/05/2023] [Revised: 02/05/2024] [Accepted: 02/20/2024] [Indexed: 03/14/2024] Open
Abstract
Parathyroid hormone (PTH) plays a pivotal role in maintaining calcium homeostasis, largely by modulating bone remodeling processes. Its effects on bone are notably dependent on the duration and frequency of exposure. Specifically, PTH can initiate both bone formation and resorption, with the outcome being influenced by the manner of PTH administration: continuous or intermittent. In continuous administration, PTH tends to promote bone resorption, possibly by regulating certain genes within bone cells. Conversely, intermittent exposure generally favors bone formation, possibly through transient gene activation. PTH's role extends to various aspects of bone cell activity. It directly influences skeletal stem cells, osteoblastic lineage cells, osteocytes, and T cells, playing a critical role in bone generation. Simultaneously, it indirectly affects osteoclast precursor cells and osteoclasts, and has a direct impact on T cells, contributing to its role in bone resorption. Despite these insights, the intricate mechanisms through which PTH acts within the bone marrow niche are not entirely understood. This article reviews the dual roles of PTH-catabolic and anabolic-on bone cells, highlighting the cellular and molecular pathways involved in these processes. The complex interplay of these factors in bone remodeling underscores the need for further investigation to fully comprehend PTH's multifaceted influence on bone health.
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Affiliation(s)
- Hanghang Liu
- State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China;
- Maine Medical Center, MaineHealth Institute for Research, 81 Research Drive, Scarborough, ME 04074, USA;
| | - Linyi Liu
- Maine Medical Center, MaineHealth Institute for Research, 81 Research Drive, Scarborough, ME 04074, USA;
| | - Clifford J. Rosen
- Maine Medical Center, MaineHealth Institute for Research, 81 Research Drive, Scarborough, ME 04074, USA;
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3
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Weerasinghe DK, Hodge JM, Pasco JA, Samarasinghe RM, Azimi Manavi B, Williams LJ. Antipsychotic-induced bone loss: the role of dopamine, serotonin and adrenergic receptor signalling. Front Cell Dev Biol 2023; 11:1184550. [PMID: 37305679 PMCID: PMC10248006 DOI: 10.3389/fcell.2023.1184550] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2023] [Accepted: 05/09/2023] [Indexed: 06/13/2023] Open
Abstract
Antipsychotics are commonly used in treating psychiatric disorders. These medications primarily target dopamine the serotonin receptors, they have some affinity to adrenergic, histamine, glutamate and muscarinic receptors. There is clinical evidence that antipsychotic use decreases BMD and increases fracture risk, with dopamine, serotonin and adrenergic receptor-signalling becoming an increasing area of focus where the presence of these receptors in osteoclasts and osteoblasts have been demonstrated. Osteoclasts and osteoblasts are the most important cells in the bone remodelling and the bone regeneration process where the activity of these cells determine the bone resorption and formation process in order to maintain healthy bone. However, an imbalance in osteoclast and osteoblast activity can lead to decreased BMD and increased fracture risk, which is also believed to be exacerbated by antipsychotics use. Therefore, the aim of this review is to provide an overview of the mechanisms of action of first, second and third generation antipsychotics and the expression profiles of dopamine, serotonin and adrenergic receptors during osteoclastogenesis and osteoblastogenesis.
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Affiliation(s)
- D. Kavindi Weerasinghe
- IMPACT—The Institute for Mental and Physical Health and Clinical Translation, Deakin University, Geelong, VIC, Australia
| | - Jason M. Hodge
- IMPACT—The Institute for Mental and Physical Health and Clinical Translation, Deakin University, Geelong, VIC, Australia
- Barwon Health, Geelong, VIC, Australia
| | - Julie A. Pasco
- IMPACT—The Institute for Mental and Physical Health and Clinical Translation, Deakin University, Geelong, VIC, Australia
- Barwon Health, Geelong, VIC, Australia
- Department of Medicine—Western Health, The University of Melbourne, Melbourne, VIC, Australia
| | - Rasika M. Samarasinghe
- IMPACT—The Institute for Mental and Physical Health and Clinical Translation, Deakin University, Geelong, VIC, Australia
| | - Behnaz Azimi Manavi
- IMPACT—The Institute for Mental and Physical Health and Clinical Translation, Deakin University, Geelong, VIC, Australia
| | - Lana J. Williams
- IMPACT—The Institute for Mental and Physical Health and Clinical Translation, Deakin University, Geelong, VIC, Australia
- Barwon Health, Geelong, VIC, Australia
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Wang X, Liang X, Wang T, Zhan Y, Liu H, Li C, Li X, Ma H, Hu Z, Wang X, Xiao S, Ban L, He J, Li Y, Fang Y. Biosimilarity Assessment of the Biosimilar Teriparatide Candidate and the Reference Drug in Healthy Subjects. Clin Pharmacol Drug Dev 2023; 12:518-524. [PMID: 36710466 DOI: 10.1002/cpdd.1221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Accepted: 12/23/2022] [Indexed: 01/31/2023]
Abstract
SAL001, a recombinant form of parathyroid hormone, is a biosimilar drug to teriparatide and is planned to be used in osteoporosis treatment. A single-dose, randomized, open-label, 2-way crossover trial was conducted in healthy subjects to compare the pharmacokinetics (PK) and safety between SAL001 and the reference drug. Sixty-four subjects were enrolled in the study, and 61 subjects completed the study. In each period, 20 μg of the test or reference formulation was administered subcutaneously. SAL001 was administered by autoinjector pen, whereas the reference drug was administered by a self-matched injection pen. Serial blood samples were obtained for the analyses of PK and serum calcium concentration. Geometric mean ratios with 90%CIs for the maximum plasma concentration (Cmax ) and area under the plasma concentration-time curve (AUC) were estimated. The safety of these 2 formulations was also evaluated. Overall, the 90%CIs for the geometric mean ratios of Cmax , AUC from time 0 to the last quantifiable time point, and AUC from time 0 extrapolated to infinity of the test or reference product were within 80.0%-125.0% of biosimilarity criteria. Other PK parameters, serum calcium concentration, and safety profiles had no significant differences between the 2 formulations. SAL001 demonstrated PK similarity to the reference drug, and the serum calcium concentration and safety profiles of SAL001 were also considered comparable to the reference drug.
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Affiliation(s)
- Xuan Wang
- Department of Phase I Clinical Trial Unit, The Fifth Affiliated Hospital of Guangzhou Medical University, Guangdong, China
| | - Xintong Liang
- Department of Pharmacy, The Fifth Affiliated Hospital of Guangzhou Medical University, Guangdong, China
| | - Tenghua Wang
- Department of Pharmacy, The Fifth Affiliated Hospital of Guangzhou Medical University, Guangdong, China
| | - Yaoxuan Zhan
- Department of Phase I Clinical Trial Unit, The Fifth Affiliated Hospital of Guangzhou Medical University, Guangdong, China
| | - Haiyan Liu
- Department of Phase I Clinical Trial Unit, The Fifth Affiliated Hospital of Guangzhou Medical University, Guangdong, China
| | - Chen Li
- Department of Pharmacy, The Fifth Affiliated Hospital of Guangzhou Medical University, Guangdong, China
| | - Xianbo Li
- Department of Phase I Clinical Trial Unit, The Fifth Affiliated Hospital of Guangzhou Medical University, Guangdong, China
| | - Hui Ma
- Shenzhen Salubris Pharmaceuticals Co. Ltd., Shenzhen, China
| | - Zhiqin Hu
- Department of Pharmacy, The Fifth Affiliated Hospital of Guangzhou Medical University, Guangdong, China
| | - Xiaole Wang
- Department of Pharmacy, The Fifth Affiliated Hospital of Guangzhou Medical University, Guangdong, China
| | - Shuangshuang Xiao
- Department of Phase I Clinical Trial Unit, The Fifth Affiliated Hospital of Guangzhou Medical University, Guangdong, China
| | - Li Ban
- Department of Pharmacy, The Fifth Affiliated Hospital of Guangzhou Medical University, Guangdong, China
| | - Jin He
- Department of Pharmacy, The Fifth Affiliated Hospital of Guangzhou Medical University, Guangdong, China
| | - Yongmei Li
- Department of Pharmacy, The Fifth Affiliated Hospital of Guangzhou Medical University, Guangdong, China
| | - Yi Fang
- Department of Pharmacy, The Fifth Affiliated Hospital of Guangzhou Medical University, Guangdong, China.,Department of Pharmacy, Peking University People's Hospital, Beijing, China.,Key Laboratory of Molecular Target and Clinical Pharmacology, The Fifth Affiliated Hospital & School Pharmaceutical Sciences, Guangzhou Medical University, Guangdong, China
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5
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Treyball A, Bergeron AC, Brooks DJ, Langlais AL, Hashmi H, Nagano K, Barlow D, Neilson RJ, Roy TA, Nevola KT, Houseknecht KL, Baron R, Bouxsein ML, Guntur AR, Motyl KJ. Propranolol Promotes Bone Formation and Limits Resorption Through Novel Mechanisms During Anabolic Parathyroid Hormone Treatment in Female C57BL/6J Mice. J Bone Miner Res 2022; 37:954-971. [PMID: 35122666 PMCID: PMC9098680 DOI: 10.1002/jbmr.4523] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Revised: 01/15/2022] [Accepted: 01/30/2022] [Indexed: 11/09/2022]
Abstract
Although the nonselective β-blocker, propranolol, improves bone density with parathyroid hormone (PTH) treatment in mice, the mechanism of this effect is unclear. To address this, we used a combination of in vitro and in vivo approaches to address how propranolol influences bone remodeling in the context of PTH treatment. In female C57BL/6J mice, intermittent PTH and propranolol administration had complementary effects in the trabecular bone of the distal femur and fifth lumbar vertebra (L5 ), with combination treatment achieving microarchitectural parameters beyond that of PTH alone. Combined treatment improved the serum bone formation marker, procollagen type 1 N propeptide (P1NP), but did not impact other histomorphometric parameters relating to osteoblast function at the L5 . In vitro, propranolol amplified the acute, PTH-induced, intracellular calcium signal in osteoblast-like cells. The most striking finding, however, was suppression of PTH-induced bone resorption. Despite this, PTH-induced receptor activator of nuclear factor κ-B ligand (RANKL) mRNA and protein levels were unaltered by propranolol, which led us to hypothesize that propranolol could act directly on osteoclasts. Using in situ methods, we found Adrb2 expression in osteoclasts in vivo, suggesting β-blockers may directly impact osteoclasts. Consistent with this, we found propranolol directly suppresses osteoclast differentiation in vitro. Taken together, this work suggests a strong anti-osteoclastic effect of nonselective β-blockers in vivo, indicating that combining propranolol with PTH could be beneficial to patients with extremely low bone density. © 2022 American Society for Bone and Mineral Research (ASBMR).
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Affiliation(s)
- Annika Treyball
- Center for Molecular Medicine, Maine Medical Center Research Institute, Scarborough, ME, USA
| | - Audrey C Bergeron
- Center for Molecular Medicine, Maine Medical Center Research Institute, Scarborough, ME, USA
| | - Daniel J Brooks
- Center for Advanced Orthopaedic Studies, Beth Israel Deaconess Medical Center, Boston, MA, USA
| | - Audrie L Langlais
- Center for Molecular Medicine, Maine Medical Center Research Institute, Scarborough, ME, USA.,Graduate School of Biomedical Sciences and Engineering, University of Maine, Orono, ME, USA
| | - Hina Hashmi
- Center for Molecular Medicine, Maine Medical Center Research Institute, Scarborough, ME, USA
| | - Kenichi Nagano
- Department of Oral Medicine, Infection and Immunity, Harvard School of Dental Medicine, Boston, MA, USA
| | - Deborah Barlow
- Department of Biomedical Sciences, University of New England, Biddeford, ME, USA
| | - Ryan J Neilson
- Center for Molecular Medicine, Maine Medical Center Research Institute, Scarborough, ME, USA
| | - Tyler A Roy
- Center for Molecular Medicine, Maine Medical Center Research Institute, Scarborough, ME, USA
| | - Kathleen T Nevola
- Center for Molecular Medicine, Maine Medical Center Research Institute, Scarborough, ME, USA.,Tufts Graduate School of Biomedical Sciences, Tufts University, Boston, MA, USA
| | - Karen L Houseknecht
- Department of Biomedical Sciences, University of New England, Biddeford, ME, USA
| | - Roland Baron
- Department of Oral Medicine, Infection and Immunity, Harvard School of Dental Medicine, Boston, MA, USA
| | - Mary L Bouxsein
- Center for Advanced Orthopaedic Studies, Beth Israel Deaconess Medical Center, Boston, MA, USA.,Department of Orthopedic Surgery, Harvard Medical School, Boston, MA, USA
| | - Anyonya R Guntur
- Center for Molecular Medicine, Maine Medical Center Research Institute, Scarborough, ME, USA.,Graduate School of Biomedical Sciences and Engineering, University of Maine, Orono, ME, USA.,Tufts University School of Medicine, Tufts University, Boston, MA, USA
| | - Katherine J Motyl
- Center for Molecular Medicine, Maine Medical Center Research Institute, Scarborough, ME, USA.,Graduate School of Biomedical Sciences and Engineering, University of Maine, Orono, ME, USA.,Tufts University School of Medicine, Tufts University, Boston, MA, USA
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6
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Exogenous Parathyroid Hormone Alleviates Intervertebral Disc Degeneration through the Sonic Hedgehog Signalling Pathway Mediated by CREB. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2022; 2022:9955677. [PMID: 35265269 PMCID: PMC8898813 DOI: 10.1155/2022/9955677] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Revised: 01/31/2022] [Accepted: 02/01/2022] [Indexed: 12/19/2022]
Abstract
As an important hormone that regulates the balance of calcium and phosphorus, parathyroid hormone (PTH) has also been found to have an important function in intervertebral disc degeneration (IVDD). Our aim was to investigate the mechanism by which PTH alleviates IVDD. In this study, the PTH 1 receptor was found to be highly expressed in severely degenerated human nucleus pulposus (NP) cells. We found in the mouse model of IVDD that supplementation with exogenous PTH alleviated the narrowing of the intervertebral space and the degradation of the extracellular matrix (ECM) caused by tail suspension (TS). In addition, inflammation, oxidative stress, and apoptosis levels were significantly increased in the intervertebral disc tissues of TS-induced mice, and the activity of NP cells was decreased. TS also led to the downregulation of Sonic hedgehog (SHH) signalling pathway-related signal molecules in NP cells such as SHH, Smoothened, and GLI1. However, supplementation with exogenous PTH can reverse these changes. In vitro, PTH also promotes the activity of NP cells and the secretion of ECM. However, the antagonist of the SHH signalling pathway can inhibit the therapeutic effect of PTH on NP cells. In addition, a cAMP-response element-binding protein, as an important transcription factor, was found to mediate the promotion of PTH on the SHH signalling pathway. Our results revealed that PTH can alleviate IVDD by inhibiting inflammation, oxidative stress, and apoptosis and improving the activity of NP cells via activating the SHH signalling pathway.
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Conceição F, Sousa DM, Paredes J, Lamghari M. Sympathetic activity in breast cancer and metastasis: partners in crime. Bone Res 2021; 9:9. [PMID: 33547275 PMCID: PMC7864971 DOI: 10.1038/s41413-021-00137-1] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Revised: 11/16/2020] [Accepted: 11/20/2020] [Indexed: 01/30/2023] Open
Abstract
The vast majority of patients with advanced breast cancer present skeletal complications that severely compromise their quality of life. Breast cancer cells are characterized by a strong tropism to the bone niche. After engraftment and colonization of bone, breast cancer cells interact with native bone cells to hinder the normal bone remodeling process and establish an osteolytic "metastatic vicious cycle". The sympathetic nervous system has emerged in recent years as an important modulator of breast cancer progression and metastasis, potentiating and accelerating the onset of the vicious cycle and leading to extensive bone degradation. Furthermore, sympathetic neurotransmitters and their cognate receptors have been shown to promote several hallmarks of breast cancer, such as proliferation, angiogenesis, immune escape, and invasion of the extracellular matrix. In this review, we assembled the current knowledge concerning the complex interactions that take place in the tumor microenvironment, with a special emphasis on sympathetic modulation of breast cancer cells and stromal cells. Notably, the differential action of epinephrine and norepinephrine, through either α- or β-adrenergic receptors, on breast cancer progression prompts careful consideration when designing new therapeutic options. In addition, the contribution of sympathetic innervation to the formation of bone metastatic foci is highlighted. In particular, we address the remarkable ability of adrenergic signaling to condition the native bone remodeling process and modulate the bone vasculature, driving breast cancer cell engraftment in the bone niche. Finally, clinical perspectives and developments on the use of β-adrenergic receptor inhibitors for breast cancer management and treatment are discussed.
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Affiliation(s)
- Francisco Conceição
- grid.5808.50000 0001 1503 7226I3S—Instituto de Investigação e Inovação em Saúde, Universidade do Porto, 4200-135 Porto, Portugal ,grid.5808.50000 0001 1503 7226INEB—Instituto Nacional de Engenharia Biomédica, Universidade do Porto, 4200-135 Porto, Portugal ,grid.5808.50000 0001 1503 7226ICBAS—Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, 4050-313 Porto, Portugal
| | - Daniela M. Sousa
- grid.5808.50000 0001 1503 7226I3S—Instituto de Investigação e Inovação em Saúde, Universidade do Porto, 4200-135 Porto, Portugal ,grid.5808.50000 0001 1503 7226INEB—Instituto Nacional de Engenharia Biomédica, Universidade do Porto, 4200-135 Porto, Portugal
| | - Joana Paredes
- grid.5808.50000 0001 1503 7226I3S—Instituto de Investigação e Inovação em Saúde, Universidade do Porto, 4200-135 Porto, Portugal ,grid.5808.50000 0001 1503 7226IPATIMUP—Instituto de Patologia e Imunologia Molecular da Universidade do Porto, 4200-135 Porto, Portugal ,grid.5808.50000 0001 1503 7226FMUP—Faculdade de Medicina da Universidade do Porto, 4200-319 Porto, Portugal
| | - Meriem Lamghari
- grid.5808.50000 0001 1503 7226I3S—Instituto de Investigação e Inovação em Saúde, Universidade do Porto, 4200-135 Porto, Portugal ,grid.5808.50000 0001 1503 7226INEB—Instituto Nacional de Engenharia Biomédica, Universidade do Porto, 4200-135 Porto, Portugal ,grid.5808.50000 0001 1503 7226ICBAS—Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, 4050-313 Porto, Portugal
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Badreldin AA, Bagheri L, Zhang B, Larson AN, van Wijnen AJ. Relative mRNA and protein stability of epigenetic regulators in musculoskeletal cell culture models. Gene 2021; 766:145032. [PMID: 32771387 DOI: 10.1016/j.gene.2020.145032] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Revised: 07/04/2020] [Accepted: 08/04/2020] [Indexed: 11/19/2022]
Abstract
Control of gene expression by epigenetic regulators is fundamental to tissue development and homeostasis. Loss-of-function (LOF) studies using siRNAs for epigenetic regulators require that RNA interference rapidly reduces the cellular levels of the corresponding mRNAs and/or proteins. The most abundant chromatin structural proteins (i.e., the core histones H2A, H2B, H3 and H4) have relatively long half-lives and do not turn over rapidly, although their mRNAs are labile. The question arises whether epigenetic regulatory enzymes (e.g., Ezh2) or proteins that interact with histones via selective modifications (e.g., Cbx1 to Cbx8, Brd4) are stable or unstable. Therefore, we performed classical α-amanitin and cycloheximide inhibition assays that block, respectively, mRNA transcription and protein translation in mouse MC3T3 osteoblasts, ATDC5 chondrocytes and C2C12 myoblasts. We find that mRNA levels of Cbx proteins and Ezh2 were significantly depleted after 24 hrs, while their corresponding proteins remained relatively stable. As positive control, the half-life of the labile cyclin D1 protein was found to be less than 1 hr. Our study suggests that histone code readers and writers are relatively stable chromatin-related proteins, which is consistent with their long-term activities in maintaining chromatin organization and phenotype identity. These findings have conceptual ramifications for the interpretation of RNAi experiments that reduce the mRNA but not protein levels of epiregulatory proteins. We propose that siRNAs for at least some epigenetic regulatory proteins may exert their biological effects by blocking translation and new protein synthesis rather than by decreasing pre-existing protein pools.
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Affiliation(s)
- Amr A Badreldin
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN, USA.
| | - Leila Bagheri
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN, USA.
| | - Bangke Zhang
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN, USA
| | - A Noelle Larson
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN, USA.
| | - Andre J van Wijnen
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN, USA; Department of Biochemistry and Molecular Biology, Mayo Clinic, Rochester, MN, USA.
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Sun JL, Yan JF, Li J, Wang WR, Yu SB, Zhang HY, Huang F, Niu LN, Jiao K. Conditional deletion of Adrb2 in mesenchymal stem cells attenuates osteoarthritis-like defects in temporomandibular joint. Bone 2020; 133:115229. [PMID: 31926929 DOI: 10.1016/j.bone.2020.115229] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/19/2019] [Revised: 12/31/2019] [Accepted: 01/08/2020] [Indexed: 01/07/2023]
Abstract
β2-adrenergic signal transduction in mesenchymal stem cells (MSCs) induces subchondral bone loss in osteoarthritis (OA) of temporomandibular joints (TMJs). However, whether conditional deletion of β2-adrenergic receptor (Adrb2) in nestin+ MSCs can alleviate TMJ-OA development remains unknown. In this study, nestin-Cre mice were crossed with Adrb2 flox mice to generate mice lacking Adrb2 expression specifically in the nestin+ MSCs (Adrb2-/-), and TMJ-OA development in such mice was investigated. Adrb2 flox mice (Adrb2+/+) and Adrb2-/- mice were subjected to unilateral anterior crossbite (UAC), while mice in the control group were subjected to sham operation. Adrb2+/+ and Adrb2-/- mice in the control group showed no distinguishable phenotypic changes in body weight and length, mandibular condylar size, and other histomorphological parameters of the condylar subchondral bone. A significant increase in subchondral bone loss and cartilage degradation was observed in Adrb2+/+ UAC mice; the former was characterized by decreased bone mineral density, bone volume fraction, and trabecular plate thickness, and increased trabecular separation, osteoclast number and osteoclast surface, and pro-osteoclastic factor expression; the latter was characterized by decreased cartilage thickness, chondrocyte density, proteoglycan area, and collagen II and aggrecan expression, but increased matrix metalloproteinase and alkaline phosphatase expression and percentage area of calcified cartilage. Adrb2 deletion in nestin+ MSCs largely attenuated UAC-induced increase in condylar subchondral bone loss, cartilage degradation, and aberrant calcification at the osteochondral interface. Thus, Adrb2-expressing MSCs in the condylar subchondral bone play an important role in TMJ-OA progression and may serve as novel therapeutic targets for TMJ-OA.
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Affiliation(s)
- Jin-Long Sun
- State Key Laboratory of Military Stomatology, School of Stomatology, Fourth Military Medical University, Xi'an 710032, China.; Department of Stomatology, Sixth Medical Center of PLA General Hospital, Beijing 100048, China
| | - Jian-Fei Yan
- State Key Laboratory of Military Stomatology, School of Stomatology, Fourth Military Medical University, Xi'an 710032, China
| | - Jing Li
- State Key Laboratory of Military Stomatology, School of Stomatology, Fourth Military Medical University, Xi'an 710032, China
| | - Wan-Rong Wang
- State Key Laboratory of Military Stomatology, School of Stomatology, Fourth Military Medical University, Xi'an 710032, China
| | - Shi-Bin Yu
- State Key Laboratory of Military Stomatology, School of Stomatology, Fourth Military Medical University, Xi'an 710032, China
| | - Hong-Yun Zhang
- State Key Laboratory of Military Stomatology, School of Stomatology, Fourth Military Medical University, Xi'an 710032, China
| | - Fei Huang
- Department of Stomatology, Sixth Medical Center of PLA General Hospital, Beijing 100048, China
| | - Li-Na Niu
- State Key Laboratory of Military Stomatology, School of Stomatology, Fourth Military Medical University, Xi'an 710032, China..
| | - Kai Jiao
- State Key Laboratory of Military Stomatology, School of Stomatology, Fourth Military Medical University, Xi'an 710032, China..
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Variable osteogenic performance of MC3T3-E1 subclones impacts their utility as models of osteoblast biology. Sci Rep 2019; 9:8299. [PMID: 31165768 PMCID: PMC6549152 DOI: 10.1038/s41598-019-44575-8] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2018] [Accepted: 05/13/2019] [Indexed: 12/12/2022] Open
Abstract
The spontaneously immortalized murine calvarial cell line MC3T3-E1 and its derivative subclones are widely used models of osteoblast biology. Many investigators have reported conflicting data under seemingly similar experimental conditions, though the specific subclone studied is often not specified. The purpose of this study was to directly compare the commercially available MC3T3-E1 subclones 4, 14, and 24 in terms of responsiveness to osteogenic induction media and/or stimulation with rhPTH[1–34]. We assayed osteogenic gene expression, capacity to deposit and mineralize a collagenous matrix, and the expression and signaling function of PTH1R. Our data demonstrate that each subclone bears little functional resemblance to the others, or to primary calvarial osteoblasts. Specifically, whereas subclone 4 is responsive to PTH stimulation and capable of matrix mineralization, subclones 14 and 24 do not faithfully replicate these key aspects of osteoblast biology. Furthermore, little overlap was observed between the gene expression profile of subclone 4 and primary calvarial osteoblasts. Our experience working with these cell lines demonstrates that the MC3T3-E1 derived cell lines are imperfect models of osteoblast biology, and reinforce the importance of clearly articulating selection and reporting of research materials.
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Marwaha RK, Garg MK, Mahalle N, Bhadra K, Tandon N. Role of Parathyroid Hormone in Determination of Fat Mass in Patients with Vitamin D Deficiency. Indian J Endocrinol Metab 2017; 21:848-853. [PMID: 29285447 PMCID: PMC5729672 DOI: 10.4103/ijem.ijem_42_17] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND Obesity has become a global epidemic and it is rising is Asia. Vitamin D deficiency (VDD) is widely prevalent in the Indian subcontinent. Studies have linked VDD to obesity and shown correlation between parathyroid hormone (PTH), 25-hydroxy Vitamin D (25(OH)D), and fat mass (FM). However, studies on the role of PTH among subjects with VDD are lacking. OBJECTIVE The objective of this study is to study the role of PTH in the determination of FM in participants with VDD. SUBJECTS Five hundred and fifty-one adults (m:247, f:304) were included in this study. MATERIALS AND METHODS Total and regional (trunk, arm, and leg) FM was assessed by dual X-ray absorptometry. Biochemical and hormonal parameters such as calcium, phosphorus, alkaline phosphatase, ionic calcium, 25(OH)D, and PTH were also analyzed. RESULTS The mean age of the study population was 58.8 ± 15.8 years (Male: [63.3 ± 13.1], Female: [55.2 ± 16.9]). FM and body mass index were significantly lower in females with higher levels of serum 25(OH)D. Total FM was negatively correlated with serum 25(OH)D (r = -0.363, P < 0.0001) and positively correlated with serum PTH (r: 0.262, P < 0.0001) in females only. Females with VDD and secondary hyperparathyroidism had higher FM than those with normal PTH. CONCLUSIONS Females with VDD had higher total and regional FM. However, this correlation was evident only in those with high serum PTH levels, suggesting a potential role of PTH in the accumulation of FM.
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Affiliation(s)
| | - M. K. Garg
- Departmemt of Endocrinology, Command Hospital (Southern Command), Pune, Maharashtra, India
| | - Namita Mahalle
- Department of Pathology, Deenanath Mangeshkar Hospital and Research Center, Pune, Maharashtra, India
| | - Kuntal Bhadra
- Department of Endocrinology, Thyroid Research Centre, Institute of Nuclear Medicine and Allied Sciences, New Delhi, India
| | - Nikhil Tandon
- Department of Endocrinology and Metabolism, All India Institute of Medical Sciences, New Delhi, India
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12
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Chen D, Wang Z. Adrenaline inhibits osteogenesis via repressing miR-21 expression. Cell Biol Int 2016; 41:8-15. [DOI: 10.1002/cbin.10685] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2016] [Accepted: 09/17/2016] [Indexed: 12/13/2022]
Affiliation(s)
- Danying Chen
- Department of Dental Implantology, School and Hospital of Stomatology; Tongji University, Shanghai Engineering Research Center of Tooth Restoration and Regeneration; 399 Yanchang Road Shanghai 200072 PR China
| | - Zuolin Wang
- Department of Dental Implantology, School and Hospital of Stomatology; Tongji University, Shanghai Engineering Research Center of Tooth Restoration and Regeneration; 399 Yanchang Road Shanghai 200072 PR China
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13
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Xiong L, Xia WF, Tang FL, Pan JX, Mei L, Xiong WC. Retromer in Osteoblasts Interacts With Protein Phosphatase 1 Regulator Subunit 14C, Terminates Parathyroid Hormone's Signaling, and Promotes Its Catabolic Response. EBioMedicine 2016; 9:45-60. [PMID: 27333042 PMCID: PMC4972523 DOI: 10.1016/j.ebiom.2016.05.028] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2015] [Revised: 05/11/2016] [Accepted: 05/24/2016] [Indexed: 12/02/2022] Open
Abstract
Parathyroid hormone (PTH) plays critical, but distinct, roles in bone remodeling, including bone formation (anabolic response) and resorption (catabolic response). Although its signaling and function have been extensively investigated, it just began to be understood how distinct functions are induced by PTH activating a common receptor, the PTH type 1 receptor (PTH1R), and how PTH1R signaling is terminated. Here, we provide evidence for vacuolar protein sorting 35 (VPS35), a major component of retromer, in regulating PTH1R trafficking, turning off PTH signaling, and promoting its catabolic function. VPS35 is expressed in osteoblast (OB)-lineage cells. VPS35-deficiency in OBs impaired PTH(1–34)-promoted PTH1R translocation to the trans-Golgi network, enhanced PTH(1–34)-driven signaling, and reduced PTH(1–34)'s catabolic response in culture and in mice. Further mechanical studies revealed that VPS35 interacts with not only PTH1R, but also protein phosphatase 1 regulatory subunit 14C (PPP1R14C), an inhibitory subunit of PP1 phosphatase. PPP1R14C also interacts with PTH1R, which is necessary for the increased endosomal PTH1R signaling and decreased PTH(1–34)'s catabolic response in VPS35-deficient OB-lineage cells. Taken together, these results suggest that VPS35 deregulates PTH1R-signaling likely by its interaction with PTH1R and PPP1R14C. This event is critical for the control of PTH(1–34)-signaling dynamics, which may underlie PTH-induced catabolic response and adequate bone remodeling. VPS35 terminates PTH(1-34)-induced cell surface and endosomal signalings Osteoblastic VPS35 promotes PTH(1-34)-driven catabolic response VPS35 interacts with PPP1R14C PPP1R14C also interacts with PTH1R and promotes PTH(1-34)-induced endosomal signaling PPP1R14C is necessary for the increased endosomal PTH1R signaling and decreased PTH(1-34)’s catabolic response in VPS35-deficient OB-lineage cells
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Affiliation(s)
- Lei Xiong
- Department of Neuroscience & Regenerative Medicine, Department of Neurology, Medical College of Georgia, Augusta, GA 30912, United States; Charlie Norwood VA Medical Center, Augusta, GA 30912, United States
| | - Wen-Fang Xia
- Department of Neuroscience & Regenerative Medicine, Department of Neurology, Medical College of Georgia, Augusta, GA 30912, United States; Charlie Norwood VA Medical Center, Augusta, GA 30912, United States; Department of Endocrinology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Fu-Lei Tang
- Department of Neuroscience & Regenerative Medicine, Department of Neurology, Medical College of Georgia, Augusta, GA 30912, United States; Charlie Norwood VA Medical Center, Augusta, GA 30912, United States
| | - Jin-Xiu Pan
- Department of Neuroscience & Regenerative Medicine, Department of Neurology, Medical College of Georgia, Augusta, GA 30912, United States; Charlie Norwood VA Medical Center, Augusta, GA 30912, United States
| | - Lin Mei
- Department of Neuroscience & Regenerative Medicine, Department of Neurology, Medical College of Georgia, Augusta, GA 30912, United States; Charlie Norwood VA Medical Center, Augusta, GA 30912, United States
| | - Wen-Cheng Xiong
- Department of Neuroscience & Regenerative Medicine, Department of Neurology, Medical College of Georgia, Augusta, GA 30912, United States; Charlie Norwood VA Medical Center, Augusta, GA 30912, United States.
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Shirakawa J, Harada H, Noda M, Ezura Y. PTH-Induced Osteoblast Proliferation Requires Upregulation of the Ubiquitin-Specific Peptidase 2 (Usp2) Expression. Calcif Tissue Int 2016; 98:306-15. [PMID: 26643174 DOI: 10.1007/s00223-015-0083-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/09/2015] [Accepted: 11/06/2015] [Indexed: 12/11/2022]
Abstract
Osteoporosis is a common disease that increases individual's fragility fracture risk. PTH is the only therapeutic agent for severe osteoporosis that requires anabolic action of bone formation. Although a part of the PTH actions is explained by increased proliferation of osteoblastic precursor cells, the mechanisms involved in the proliferation of osteoblastic cells by PTH have not been clarified yet. Therefore, in this study, we investigated the effects of PTH on gene expression in the cultured osteoblastic MC3T3-E1 cells, and found that the ubiquitin-specific peptidase 2 (Usp2) may be one of the direct target genes of PTHR signaling. Usp2 is a deubiquitination enzyme targeting various factors including CyclinD1 in cancer cells and PTH receptor 1 in osteoblasts. We confirmed that consistent induction of Usp2 expression peaked at 1 h by PTH1-34 (teriparatide) in MC3T3-E1 cells and primary calvarial osteoblasts. Among the three known splicing variants of the Usp2, we found the isoforms 1 and 2 are predominantly expressed in osteoblasts. Live-imaging analysis of the Fucci-transgenic mouse-derived primary osteoblasts indeed demonstrated that Usp2 is required for the PTH1-34-induced osteoblast proliferation. Western blotting analysis of the CyclinD1 indicated that Usp2 knock-down influences the paradoxical changes of CyclinD1 protein levels in this condition. Our data indicate that Usp2 is required for the PTH1-34-induced proliferation of osteoblasts.
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Affiliation(s)
- Jumpei Shirakawa
- Department of Molecular Pharmacology, Medical Research Institute, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo, Tokyo, 113-8510, Japan
- Global COE Program, Tokyo Medical and Dental University, Tokyo, Japan
- Department of Oral and Maxillofacial Surgery, Tokyo Medical and Dental University, Tokyo, Japan
| | - Hiroyuki Harada
- Department of Oral and Maxillofacial Surgery, Tokyo Medical and Dental University, Tokyo, Japan
| | - Masaki Noda
- Department of Molecular Pharmacology, Medical Research Institute, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo, Tokyo, 113-8510, Japan.
- Global COE Program, Tokyo Medical and Dental University, Tokyo, Japan.
| | - Yoichi Ezura
- Department of Molecular Pharmacology, Medical Research Institute, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo, Tokyo, 113-8510, Japan.
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