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Price K, Yang WH, Cardoso L, Wang CM, Yang RH, Yang WH. Jun Dimerization Protein 2 (JDP2) Increases p53 Transactivation by Decreasing MDM2. Cancers (Basel) 2024; 16:1000. [PMID: 38473360 DOI: 10.3390/cancers16051000] [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: 02/05/2024] [Revised: 02/23/2024] [Accepted: 02/27/2024] [Indexed: 03/14/2024] Open
Abstract
The AP-1 protein complex primarily consists of several proteins from the c-Fos, c-Jun, activating transcription factor (ATF), and Jun dimerization protein (JDP) families. JDP2 has been shown to interact with the cAMP response element (CRE) site present in many cis-elements of downstream target genes. JDP2 has also demonstrates important roles in cell-cycle regulation, cancer development and progression, inhibition of adipocyte differentiation, and the regulation of antibacterial immunity and bone homeostasis. JDP2 and ATF3 exhibit significant similarity in their C-terminal domains, sharing 60-65% identities. Previous studies have demonstrated that ATF3 is able to influence both the transcriptional activity and p53 stability via a p53-ATF3 interaction. While some studies have shown that JDP2 suppresses p53 transcriptional activity and in turn, p53 represses JDP2 promoter activity, the direct interaction between JDP2 and p53 and the regulatory role of JDP2 in p53 transactivation have not been explored. In the current study, we provide evidence, for the first time, that JDP2 interacts with p53 and regulates p53 transactivation. First, we demonstrated that JDP2 binds to p53 and the C-terminal domain of JDP2 is crucial for the interaction. Second, in p53-null H1299 cells, JDP2 shows a robust increase of p53 transactivation in the presence of p53 using p53 (14X)RE-Luc. Furthermore, JDP2 and ATF3 together additively enhance p53 transactivation in the presence of p53. While JDP2 can increase p53 transactivation in the presence of WT p53, JDP2 fails to enhance transactivation of hotspot mutant p53. Moreover, in CHX chase experiments, we showed that JDP2 slightly enhances p53 stability. Finally, our findings indicate that JDP2 has the ability to reverse MDM2-induced p53 repression, likely due to decreased levels of MDM2 by JDP2. In summary, our results provide evidence that JDP2 directly interacts with p53 and decreases MDM2 levels to enhance p53 transactivation, suggesting that JDP2 is a novel regulator of p53 and MDM2.
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Affiliation(s)
- Kasey Price
- Department of Biomedical Sciences, School of Medicine, Mercer University, Savannah, GA 31404, USA
| | - William H Yang
- Department of Biomedical Sciences, School of Medicine, Mercer University, Savannah, GA 31404, USA
| | - Leticia Cardoso
- Department of Biomedical Sciences, School of Medicine, Mercer University, Savannah, GA 31404, USA
| | - Chiung-Min Wang
- Department of Biomedical Sciences, School of Medicine, Mercer University, Savannah, GA 31404, USA
| | - Richard H Yang
- Department of Biomedical Sciences, School of Medicine, Mercer University, Savannah, GA 31404, USA
| | - Wei-Hsiung Yang
- Department of Biomedical Sciences, School of Medicine, Mercer University, Savannah, GA 31404, USA
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Agawa R, Kato I, Kawabata Y, Takeyama M, Fujii S. Histological and immunohistochemical analyses of osteoclast maturation in giant cell tumor of bone. Pathol Res Pract 2024; 254:155128. [PMID: 38244437 DOI: 10.1016/j.prp.2024.155128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/28/2023] [Revised: 01/09/2024] [Accepted: 01/10/2024] [Indexed: 01/22/2024]
Abstract
INTRODUCTION Giant cell tumor of bone (GCTB) is a benign but locally aggressive tumor characterized by the occurrence of multinucleated osteoclast-like giant cells that play a key role in GCTB pathogenesis. However, little is known about the molecular mechanisms underlying osteoclast differentiation in GCTB. Denosumab, a human monoclonal antibody against RANKL, is used for GCTB treatment. Here, we performed morphological and immunohistochemical examinations of pre- and post-denosumab treatment changes by analyzing each stage of osteoclast differentiation. METHODS We retrieved 15 archival cases of GCTB with tumor samples from both pre- and post-denosumab treatment. We selected three immunohistochemical markers from the expression data from a previous single-cell RNA study: FOS, a progenitor osteoclast marker, and JDP2 and NFATc1, mature osteoclast markers. RESULTS The mean positivity of the markers decreased after denosumab treatment from 11.1% to 8.9% for FOS, from 10.6% to 7.2% for JDP2, and from 10.0% to 0.2% for NFATc1. Only NFATc1 positivity decreased significantly (P < 0.001) after denosumab treatment. CONCLUSIONS We identified a new differentiation stage of osteoclast maturation, intermediate cell, by comparing histological findings before and after denosumab treatment. We demonstrated that discrepancies exist between histological and molecular data and highlight the need for establishing an integrated definition of osteoclasts considering morphology and marker expression.
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Affiliation(s)
- Rina Agawa
- Yokohama City University School of Medicine, Japan
| | - Ikuma Kato
- Department of Molecular Pathology, Yokohama City University, Graduate School of Medicine, Japan.
| | - Yusuke Kawabata
- Department of Orthopaedic Surgery, Yokohama City University Hospital, Japan
| | - Masanobu Takeyama
- Department of Orthopaedic Surgery, Yokohama City University Hospital, Japan
| | - Satoshi Fujii
- Department of Molecular Pathology, Yokohama City University, Graduate School of Medicine, Japan; Department of Diagnostic Pathology, Yokohama City University Hospital, Japan
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Nakane T, Matsumoto S, Iida S, Ido A, Fukunaga K, Murao K, Sugiyama Y. Candidate plasticity gene 16 and jun dimerization protein 2 are involved in the suppression of insulin gene expression in rat pancreatic INS-1 β-cells. Mol Cell Endocrinol 2021; 527:111240. [PMID: 33676985 DOI: 10.1016/j.mce.2021.111240] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 02/24/2021] [Accepted: 03/01/2021] [Indexed: 11/22/2022]
Abstract
Chronic hyperglycemia causes pancreatic β-cell dysfunction, impaired insulin secretion and the suppression of insulin gene expression. This phenomenon is referred to as glucotoxicity, and is a critical component of the pathogenesis of type 2 diabetes. We previously reported that the expression of candidate plasticity gene 16 (CPG16) was higher in rat pancreatic INS-1 β-cells under glucotoxic conditions and CPG16 suppressed insulin promoter activity. However, the molecular mechanisms of the CPG16-mediated suppression of insulin gene expression are unclear. In this study, we found that CPG16 directly bound and phosphorylated jun dimerization protein 2 (JDP2), an AP-1 family transcription factor. CPG16 co-localized with JDP2 in the nucleus of INS-1 cells. JDP2 bound to the G1 element of the insulin promoter and up-regulated promoter activity. Finally, CPG16 suppressed the up-regulation of insulin promoter activity by JDP2 in a kinase activity-dependent manner. These results suggest that CPG16 suppresses insulin promoter activity by phosphorylating JDP2.
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Affiliation(s)
- Tatsuto Nakane
- Department of Life Sciences, Faculty of Agriculture, Kagawa University, Kagawa, Japan
| | - Suzuka Matsumoto
- Department of Life Sciences, Faculty of Agriculture, Kagawa University, Kagawa, Japan
| | - Satoshi Iida
- Department of Life Sciences, Faculty of Agriculture, Kagawa University, Kagawa, Japan
| | - Ayae Ido
- Department of Life Sciences, Faculty of Agriculture, Kagawa University, Kagawa, Japan
| | - Kensaku Fukunaga
- Department of Endocrinology and Metabolism, Faculty of Medicine, Kagawa University, Kagawa, Japan
| | - Koji Murao
- Department of Endocrinology and Metabolism, Faculty of Medicine, Kagawa University, Kagawa, Japan
| | - Yasunori Sugiyama
- Department of Life Sciences, Faculty of Agriculture, Kagawa University, Kagawa, Japan.
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Jin W, Ma R, Zhai L, Xu X, Lou T, Huang Q, Wang J, Zhao D, Li X, Sun L. Ginsenoside Rd attenuates ACTH-induced corticosterone secretion by blocking the MC2R-cAMP/PKA/CREB pathway in Y1 mouse adrenocortical cells. Life Sci 2020; 245:117337. [PMID: 31972205 DOI: 10.1016/j.lfs.2020.117337] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Revised: 01/15/2020] [Accepted: 01/19/2020] [Indexed: 12/27/2022]
Abstract
BACKGROUND Higher levels of glucocorticoids (GCs), and impaired regulation of the hypothalamic-pituitary-adrenal (HPA) axis may cause or exacerbate the occurrence of metabolic and psychiatric disorders. It has been reported that ginseng saponin extract (GSE) has an inhibitory effect on the hyperactivity of the HPA axis induced by stresses and increased corticosterone level induced by intraperitoneal injection of adrenocorticotrophic hormone (ACTH) in mice. However, the molecular mechanisms by which GSE and its active ginsenosides inhibit corticosterone secretion remain elusive. MAIN METHODS Y1 mouse adrenocortical cells were treated with ACTH for up to 60 min to establish a cell model of corticosterone secretion. After treatment with different concentrations of GSE or ginsenoside monomers for 24 h prior to the addition of ACTH, analyses of cAMP content, PKA activity, and the levels of steroidogenesis regulators, melanocortin-2 receptor (MC2R), and melanocortin-2 receptor accessory protein (MRAP) in ACTH-induced Y1 cells were performed. RESULTS We demonstrated that GSE inhibits ACTH-stimulated corticosterone production in Y1 cells by inhibiting factors critical for steroid synthesis. Ginsenoside Rd, an active ingredient of GSE, inhibits corticosterone secretion in the cells and impedes ACTH-induced corticosterone biosynthesis through down-regulation of proteins in the cAMP/PKA/CREB signaling pathway. In addition, Western blot and qPCR analyses showed that ginsenoside Rd attenuated the induction of MC2R and MRAP by ACTH. CONCLUSION Our findings indicate that ginsenoside Rd inhibits ACTH-induced corticosterone production through blockading the MC2R-cAMP/PKA/CREB pathway in adrenocortical cells. Overall, this mechanism may represent an important therapeutic option for the treatment of stress-related disorders, further supporting the pharmacological benefits of ginseng.
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Affiliation(s)
- Wenqi Jin
- Research Center of Traditional Chinese Medicine, the Affiliated Hospital to Changchun University of Chinese Medicine, Changchun, Jilin, China
| | - Rui Ma
- Research Center of Traditional Chinese Medicine, the Affiliated Hospital to Changchun University of Chinese Medicine, Changchun, Jilin, China
| | - Lu Zhai
- Research Center of Traditional Chinese Medicine, the Affiliated Hospital to Changchun University of Chinese Medicine, Changchun, Jilin, China
| | - Xiaohao Xu
- Research Center of Traditional Chinese Medicine, the Affiliated Hospital to Changchun University of Chinese Medicine, Changchun, Jilin, China
| | - Tingting Lou
- Research Center of Traditional Chinese Medicine, the Affiliated Hospital to Changchun University of Chinese Medicine, Changchun, Jilin, China
| | - Qingxia Huang
- Research Center of Traditional Chinese Medicine, the Affiliated Hospital to Changchun University of Chinese Medicine, Changchun, Jilin, China
| | - Jing Wang
- Research Center of Traditional Chinese Medicine, the Affiliated Hospital to Changchun University of Chinese Medicine, Changchun, Jilin, China
| | - Daqing Zhao
- Key Laboratory of Active Substances and Biological Mechanisms of Ginseng Efficacy, Ministry of Education, Changchun University of Chinese Medicine, Changchun, Jilin, China; Jilin Provincial Key Laboratory of Bio-Macromolecules of Chinese Medicine, Changchun University of Chinese Medicine, Changchun, Jilin, China; Jilin Ginseng Academy, Changchun University of Chinese Medicine, Jilin, China
| | - Xiangyan Li
- Key Laboratory of Active Substances and Biological Mechanisms of Ginseng Efficacy, Ministry of Education, Changchun University of Chinese Medicine, Changchun, Jilin, China; Jilin Provincial Key Laboratory of Bio-Macromolecules of Chinese Medicine, Changchun University of Chinese Medicine, Changchun, Jilin, China; Jilin Ginseng Academy, Changchun University of Chinese Medicine, Jilin, China.
| | - Liwei Sun
- Research Center of Traditional Chinese Medicine, the Affiliated Hospital to Changchun University of Chinese Medicine, Changchun, Jilin, China.
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da Silva Oliveira Barbosa E, Roggero EA, González FB, Fernández RDV, Carvalho VF, Bottasso OA, Pérez AR, Villar SR. Evidence in Favor of an Alternative Glucocorticoid Synthesis Pathway During Acute Experimental Chagas Disease. Front Endocrinol (Lausanne) 2019; 10:866. [PMID: 31998227 PMCID: PMC6961479 DOI: 10.3389/fendo.2019.00866] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Accepted: 11/26/2019] [Indexed: 12/15/2022] Open
Abstract
It is well-established that infectious stress activates the hypothalamus-pituitary-adrenal axis leading to the production of pituitary adrenocorticotropin (ACTH) and adrenal glucocorticoids (GCs). Usually, GC synthesis is mediated by protein kinase A (PKA) signaling pathway triggered by ACTH. We previously demonstrated that acute murine Chagas disease courses with a marked increase of GC, with some data suggesting that GC synthesis may be ACTH-dissociated in the late phase of this parasitic infection. Alternative pathways of GC synthesis have been reported in sepsis or mental diseases, in which interleukin (IL)-1β, prostaglandin E2 (PGE2), and/or cAMP-activated guanine nucleotide exchange factor 2 (EPAC2) are likely to play a role in this regard. Accordingly, we have searched for the existence of an ACTH-independent pathway in an experimental model of a major parasitic disease like Chagas disease, in addition to characterizing potential alternative pathways of GC synthesis. To this end, C57BL/6 male mice were infected with T. cruzi (Tc), and evaluated throughout the acute phase for several parameters, including the kinetic of GC and ACTH release, the adrenal level of MC2R (ACTH receptor) expression, the p-PKA/PKA ratio as ACTH-dependent mechanism of signal transduction, as well as adrenal expression of IL-1β and its receptor, EPAC2 and PGE2 synthase. Our results reveal the existence of two phases involved in GC synthesis during Tc infection in mice, an initial one dealing with the well-known ACTH-dependent pathway, followed by a further ACTH-hyporesponsive phase. Furthermore, inflamed adrenal microenvironment may tune the production of intracellular mediators that also operate upon GC synthesis, like PGE2 synthase and EPAC2, as emerging driving forces for GC production in the advanced course of Tc infection. In essence, GC production seems to be associated with a biphasic action of PGE2, suggesting that the effect of PGE2/cAMP in the ACTH-independent second phase may be mediated by EPAC2.
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Affiliation(s)
| | - Eduardo A. Roggero
- Institute of Clinical and Experimental Immunology of Rosario (IDICER-CONICET-UNR), Rosario, Argentina
| | - Florencia B. González
- Institute of Clinical and Experimental Immunology of Rosario (IDICER-CONICET-UNR), Rosario, Argentina
| | - Rocío del Valle Fernández
- Institute of Clinical and Experimental Immunology of Rosario (IDICER-CONICET-UNR), Rosario, Argentina
| | - Vinicius Frias Carvalho
- Laboratory of Inflammation, Oswaldo Cruz Institute, Oswaldo Cruz Foundation, Rio de Janeiro, Brazil
- National Institute of Science and Technology on Neuroimmunomodulation (INCT-NIM), Rio de Janeiro, Brazil
| | - Oscar A. Bottasso
- Institute of Clinical and Experimental Immunology of Rosario (IDICER-CONICET-UNR), Rosario, Argentina
| | - Ana R. Pérez
- Institute of Clinical and Experimental Immunology of Rosario (IDICER-CONICET-UNR), Rosario, Argentina
- Center for Research and Production of Biological Reagents (CIPREB), Faculty of Medical Sciences, National University of Rosario, Rosario, Argentina
| | - Silvina R. Villar
- Institute of Clinical and Experimental Immunology of Rosario (IDICER-CONICET-UNR), Rosario, Argentina
- Center for Research and Production of Biological Reagents (CIPREB), Faculty of Medical Sciences, National University of Rosario, Rosario, Argentina
- *Correspondence: Silvina R. Villar ;
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Wang XH, Liu Q, Shao ZT. Deletion of JDP2 improves neurological outcomes of traumatic brain injury (TBI) in mice: Inactivation of Caspase-3. Biochem Biophys Res Commun 2018; 504:805-811. [DOI: 10.1016/j.bbrc.2018.08.055] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2018] [Accepted: 08/06/2018] [Indexed: 02/06/2023]
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