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Zhang S, Zhong M, Zhu H, You Q, Yuan H, Li Y. Hypomethylation of DRD2 promotes breast cancer through the FLNA-ERK pathway. Cancer Genet 2023; 278-279:71-78. [PMID: 37729778 DOI: 10.1016/j.cancergen.2023.09.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Revised: 07/15/2023] [Accepted: 09/05/2023] [Indexed: 09/22/2023]
Abstract
We investigated the effect of stem cell marker dopamine receptor D2 (DRD2) on the proliferation of hormone-receptor-negative breast cancer cells. High-throughput DNA methylation sequencing on an 850 K chip was used to pre-screen breast cancer tissues with significant methylation differences. The expression of DRD2 in breast cancer and normal breast tissues, and clinical risk factors, were detected by pyrophosphoric acid validation and immunohistochemistry. In vitro and in vivo experiments verified the possible molecular signaling pathways. DRD2 promoter region was hypomethylated in hormone-receptor-negative breast cancer or with high-risk factors compared to the normal tissues. The proliferation of breast cancer cells was enhanced after DRD2 was upregulated and decreased after DRD2 was downregulated. In vivo experiments found that tumor growth and the expression of antigen KI-67 (Ki67) and the cluster of differentiation 31 (CD31) were improved by the overexpression of DRD2 and inhibited by the down expression of DRD2. In vivo and in vitro experiments demonstrated the phosphorylation of filamin A and extracellular signal-regulated kinase (FLNA-ERK) was influenced by the expression of DRD2, suggesting DRD2 plays a role in the FLNA-ERK signaling pathway. Methylation inhibitors (5-aza-2-deoxycytidine, 5-azadc) partially reversed the inhibitory effect of DRD2 down expression on cell proliferation, migration, and tumor growth in animal models, indicating that inhibition of DRD2 methylation promotes cancer development. This study demonstrated the DRD2 promoter region is hypomethylated in hormone-receptor-negative breast cancer or with high-risk factors. The methylation status of the DRD2 promoter and FLNA-ERK signaling pathway and the DRD2 expression in breast cancer treatment need to be considered.
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Affiliation(s)
- Shuoyi Zhang
- Department of Breast Surgery, Shanghai Pudong Hospital, Fudan University Pudong Medical Center, China
| | - Ming Zhong
- Department of Breast Surgery, Shanghai Pudong Hospital, Fudan University Pudong Medical Center, China
| | - Hongbo Zhu
- Department of Pathology, Shanghai Pudong Hospital, Fudan University Pudong Medical Center, China
| | - Qinghua You
- Department of Pathology, Shanghai Pudong Hospital, Fudan University Pudong Medical Center, China
| | - Hao Yuan
- Department of Breast Surgery, Shanghai Pudong Hospital, Fudan University Pudong Medical Center, China
| | - Yongping Li
- Department of Breast Surgery, Shanghai Pudong Hospital, Fudan University Pudong Medical Center, China.
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Long-Term Hypoxia Maintains a State of Dedifferentiation and Enhanced Stemness in Fetal Cardiovascular Progenitor Cells. Int J Mol Sci 2021; 22:ijms22179382. [PMID: 34502291 PMCID: PMC8431563 DOI: 10.3390/ijms22179382] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Revised: 08/20/2021] [Accepted: 08/25/2021] [Indexed: 12/03/2022] Open
Abstract
Early-stage mammalian embryos survive within a low oxygen tension environment and develop into fully functional, healthy organisms despite this hypoxic stress. This suggests that hypoxia plays a regulative role in fetal development that influences cell mobilization, differentiation, proliferation, and survival. The long-term hypoxic environment is sustained throughout gestation. Elucidation of the mechanisms by which cardiovascular stem cells survive and thrive under hypoxic conditions would benefit cell-based therapies where stem cell survival is limited in the hypoxic environment of the infarcted heart. The current study addressed the impact of long-term hypoxia on fetal Islet-1+ cardiovascular progenitor cell clones, which were isolated from sheep housed at high altitude. The cells were then cultured in vitro in 1% oxygen and compared with control Islet-1+ cardiovascular progenitor cells maintained at 21% oxygen. RT-PCR, western blotting, flow cytometry, and migration assays evaluated adaptation to long term hypoxia in terms of survival, proliferation, and signaling. Non-canonical Wnt, Notch, AKT, HIF-2α and Yap1 transcripts were induced by hypoxia. The hypoxic niche environment regulates these signaling pathways to sustain the dedifferentiation and survival of fetal cardiovascular progenitor cells.
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Li H, Tong F, Meng R, Peng L, Wang J, Zhang R, Dong X. E2F1-mediated repression of WNT5A expression promotes brain metastasis dependent on the ERK1/2 pathway in EGFR-mutant non-small cell lung cancer. Cell Mol Life Sci 2021; 78:2877-2891. [PMID: 33078208 PMCID: PMC11072416 DOI: 10.1007/s00018-020-03678-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Revised: 09/30/2020] [Accepted: 10/06/2020] [Indexed: 12/11/2022]
Abstract
Brain metastasis (BM) is associated with poor prognosis in patients with advanced non-small cell lung cancer (NSCLC). Epidermal growth factor receptor (EGFR) mutation reportedly enhances the development of BM. However, the exact mechanism of how EGFR-mutant NSCLC contributes to BM remains unknown. Herein, we found the protein WNT5A, was significantly downregulated in BM tissues and EGFR-mutant samples. In addition, the overexpression of WNT5A inhibited the growth, migration, and invasion of EGFR-mutant cells in vitro and retarded tumor growth and metastasis in vivo compared with the EGFR wide-type cells. We demonstrated a molecular mechanism whereby WNT5A be negatively regulated by transcription factor E2F1, and ERK1/2 inhibitor (U0126) suppressed E2F1's regulation of WNT5A expression in EGFR-mutant cells. Furthermore, WNT5A inhibited β-catenin activity and the transcriptional levels of its downstream genes in cancer progression. Our research revealed the role of WNT5A in NSCLC BM with EGFR mutation, and proved that E2F1-mediated repression of WNT5A was dependent on the ERK1/2 pathway, supporting the notion that targeting the ERK1/2-E2F1-WNT5A pathway could be an effective strategy for treating BM in EGFR-mutant NSCLC.
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Affiliation(s)
- Huanhuan Li
- Cancer Center, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Avenue, Wuhan, 430022, People's Republic of China
| | - Fan Tong
- Cancer Center, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Avenue, Wuhan, 430022, People's Republic of China
| | - Rui Meng
- Cancer Center, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Avenue, Wuhan, 430022, People's Republic of China
| | - Ling Peng
- Cancer Center, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Avenue, Wuhan, 430022, People's Republic of China
| | - Jiaojiao Wang
- Cancer Center, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Avenue, Wuhan, 430022, People's Republic of China
| | - Ruiguang Zhang
- Cancer Center, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Avenue, Wuhan, 430022, People's Republic of China
| | - Xiaorong Dong
- Cancer Center, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Avenue, Wuhan, 430022, People's Republic of China.
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Bono F, Mutti V, Fiorentini C, Missale C. Dopamine D3 Receptor Heteromerization: Implications for Neuroplasticity and Neuroprotection. Biomolecules 2020; 10:biom10071016. [PMID: 32659920 PMCID: PMC7407647 DOI: 10.3390/biom10071016] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Revised: 07/06/2020] [Accepted: 07/08/2020] [Indexed: 12/14/2022] Open
Abstract
The dopamine (DA) D3 receptor (D3R) plays a pivotal role in the control of several functions, including motor activity, rewarding and motivating behavior and several aspects of cognitive functions. Recently, it has been reported that the D3R is also involved in the regulation of neuronal development, in promoting structural plasticity and in triggering key intracellular events with neuroprotective potential. A new role for D3R-dependent neurotransmission has thus been proposed both in preserving DA neuron homeostasis in physiological conditions and in preventing pathological alterations that may lead to neurodegeneration. Interestingly, there is evidence that nicotinic acetylcholine receptors (nAChR) located on DA neurons also provide neurotrophic support to DA neurons, an effect requiring functional D3R and suggesting the existence of a positive cross-talk between these receptor systems. Increasing evidence suggests that, as with the majority of G protein-coupled receptors (GPCR), the D3R directly interacts with other receptors to form new receptor heteromers with unique functional and pharmacological properties. Among them, we recently identified a receptor heteromer containing the nAChR and the D3R as the molecular effector of nicotine-mediated neurotrophic effects. This review summarizes the functional and pharmacological characteristics of D3R, including the capability to form active heteromers as pharmacological targets for specific neurodegenerative disorders. In particular, the molecular and functional features of the D3R-nAChR heteromer will be especially discussed since it may represent a possible key etiologic effector for DA-related pathologies, such as Parkinson’s disease (PD), and a target for drug design.
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Affiliation(s)
- Federica Bono
- Division of Pharmacology, Department of Molecular and Translational Medicine, University of Brescia, 25123 Brescia, Italy; (V.M.); (C.F.); (C.M.)
- Correspondence: ; Tel.: +39-0303717506
| | - Veronica Mutti
- Division of Pharmacology, Department of Molecular and Translational Medicine, University of Brescia, 25123 Brescia, Italy; (V.M.); (C.F.); (C.M.)
| | - Chiara Fiorentini
- Division of Pharmacology, Department of Molecular and Translational Medicine, University of Brescia, 25123 Brescia, Italy; (V.M.); (C.F.); (C.M.)
| | - Cristina Missale
- Division of Pharmacology, Department of Molecular and Translational Medicine, University of Brescia, 25123 Brescia, Italy; (V.M.); (C.F.); (C.M.)
- “C. Golgi” Women Health Center, University of Brescia, 25123 Brescia, Italy
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Tegowski M, Fan C, Baldwin AS. Selective Effects of Thioridazine on Self-Renewal of Basal-Like Breast Cancer Cells. Sci Rep 2019; 9:18695. [PMID: 31822725 PMCID: PMC6904738 DOI: 10.1038/s41598-019-55145-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2019] [Accepted: 11/19/2019] [Indexed: 01/11/2023] Open
Abstract
Several recent publications demonstrated that DRD2-targeting antipsychotics such as thioridazine induce proliferation arrest and apoptosis in diverse cancer cell types including those derived from brain, lung, colon, and breast. While most studies show that 10–20 µM thioridazine leads to reduced proliferation or increased apoptosis, here we show that lower doses of thioridazine (1–2 µM) target the self-renewal of basal-like breast cancer cells, but not breast cancer cells of other subtypes. We also show that all breast cancer cell lines tested express DRD2 mRNA and protein, regardless of thioridazine sensitivity. Further, DRD2 stimulation with quinpirole, a DRD2 agonist, promotes self-renewal, even in cell lines in which thioridazine does not inhibit self-renewal. This suggests that DRD2 is capable of promoting self-renewal in these cell lines, but that it is not active. Further, we show that dopamine can be detected in human and mouse breast tumor samples. This observation suggests that dopamine receptors may be activated in breast cancers, and is the first time to our knowledge that dopamine has been directly detected in human breast tumors, which could inform future investigation into DRD2 as a therapeutic target for breast cancer.
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Affiliation(s)
- Matthew Tegowski
- Curriculum in Genetics and Molecular Biology, The University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA.,Lineberger Comprehensive Cancer Center, The University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Cheng Fan
- Lineberger Comprehensive Cancer Center, The University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Albert S Baldwin
- Curriculum in Genetics and Molecular Biology, The University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA. .,Lineberger Comprehensive Cancer Center, The University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.
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6
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Weissenrieder JS, Neighbors JD, Mailman RB, Hohl RJ. Cancer and the Dopamine D 2 Receptor: A Pharmacological Perspective. J Pharmacol Exp Ther 2019; 370:111-126. [PMID: 31000578 DOI: 10.1124/jpet.119.256818] [Citation(s) in RCA: 56] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2019] [Accepted: 04/16/2019] [Indexed: 01/12/2023] Open
Abstract
The dopamine D2 receptor (D2R) family is upregulated in many cancers and tied to stemness. Reduced cancer risk has been correlated with disorders such as schizophrenia and Parkinson's disease, in which dopaminergic drugs are used. D2R antagonists are reported to have anticancer efficacy in cell culture and animal models where they have reduced tumor growth, induced autophagy, affected lipid metabolism, and caused apoptosis, among other effects. This has led to several hypotheses, the most prevalent being that D2R ligands may be a novel approach to cancer chemotherapy. This hypothesis is appealing because of the large number of approved and experimental drugs of this class that could be repurposed. We review the current state of the literature and the evidence for and against this hypothesis. When the existing literature is evaluated from a pharmacological context, one of the striking findings is that the concentrations needed for cytotoxic effects of D2R antagonists are orders of magnitude higher than their affinity for this receptor. Although additional definitive studies will provide further clarity, our hypothesis is that targeting D2-like dopamine receptors may only yield useful ligands for cancer chemotherapy in rare cases.
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Affiliation(s)
- Jillian S Weissenrieder
- Biomedical Sciences Program (J.S.W.) and Departments of Medicine (J.D.N., R.J.H.) and Pharmacology (J.D.N., R.B.M., R.J.H.), Penn State College of Medicine and Penn State Cancer Institute, Hershey, Pennsylvania
| | - Jeffrey D Neighbors
- Biomedical Sciences Program (J.S.W.) and Departments of Medicine (J.D.N., R.J.H.) and Pharmacology (J.D.N., R.B.M., R.J.H.), Penn State College of Medicine and Penn State Cancer Institute, Hershey, Pennsylvania
| | - Richard B Mailman
- Biomedical Sciences Program (J.S.W.) and Departments of Medicine (J.D.N., R.J.H.) and Pharmacology (J.D.N., R.B.M., R.J.H.), Penn State College of Medicine and Penn State Cancer Institute, Hershey, Pennsylvania
| | - Raymond J Hohl
- Biomedical Sciences Program (J.S.W.) and Departments of Medicine (J.D.N., R.J.H.) and Pharmacology (J.D.N., R.B.M., R.J.H.), Penn State College of Medicine and Penn State Cancer Institute, Hershey, Pennsylvania
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Mishra A, Singh S, Tiwari V, Parul, Shukla S. Dopamine D1 receptor activation improves adult hippocampal neurogenesis and exerts anxiolytic and antidepressant-like effect via activation of Wnt/β-catenin pathways in rat model of Parkinson's disease. Neurochem Int 2018; 122:170-186. [PMID: 30500462 DOI: 10.1016/j.neuint.2018.11.020] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2018] [Revised: 11/26/2018] [Accepted: 11/27/2018] [Indexed: 12/19/2022]
Abstract
Parkinson's disease (PD) is primarily characterized by midbrain dopamine depletion. Dopamine acts through dopamine receptors (D1 to D5) to regulate locomotion, motivation, pleasure, attention, cognitive functions and formation of newborn neurons, all of which are likely to be impaired in PD. Reduced hippocampal neurogenesis associated with dopamine depletion has been demonstrated in patients with PD. However, the precise mechanism to regulate multiple steps of adult hippocampal neurogenesis by dopamine receptor(s) is still unknown. In this study, we tested whether pharmacological agonism and antagonism of dopamine D1 and D2 receptor regulate nonmotor symptoms, neural stem cell (NSC) proliferation and fate specification and explored the cellular mechanism(s) underlying dopamine receptor (D1 and D2) mediated adult hippocampal neurogenesis in rat model of PD-like phenotypes. We found that single unilateral intra-medial forebrain bundle administration of 6-hydroxydopamine (6-OHDA) reduced D1 receptor level in the hippocampus. Pharmacological agonism of D1 receptor exerts anxiolytic and antidepressant-like effects as well as enhanced NSC proliferation, long-term survival and neuronal differentiation by positively regulating Wnt/β-catenin signaling pathway in hippocampus in PD rats. shRNA lentivirus mediated knockdown of Axin-2, a negative regulator of Wnt/β-catenin signaling potentially attenuated D1 receptor antagonist induced anxiety and depression-like phenotypes and impairment in adult hippocampal neurogenesis in PD rats. Our results suggest that improved nonmotor symptoms and hippocampal neurogenesis in PD rats controlled by D1-like receptors that involve the activation of Wnt/β-catenin signaling.
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Affiliation(s)
- Akanksha Mishra
- Division of Pharmacology, CSIR-Central Drug Research Institute, Lucknow, U.P, India; Academy of Scientific and Innovative Research, New Delhi, India
| | - Sonu Singh
- Division of Pharmacology, CSIR-Central Drug Research Institute, Lucknow, U.P, India
| | - Virendra Tiwari
- Division of Pharmacology, CSIR-Central Drug Research Institute, Lucknow, U.P, India; Academy of Scientific and Innovative Research, New Delhi, India
| | - Parul
- Division of Pharmacology, CSIR-Central Drug Research Institute, Lucknow, U.P, India
| | - Shubha Shukla
- Division of Pharmacology, CSIR-Central Drug Research Institute, Lucknow, U.P, India; Academy of Scientific and Innovative Research, New Delhi, India.
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8
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Tegowski M, Fan C, Baldwin AS. Thioridazine inhibits self-renewal in breast cancer cells via DRD2-dependent STAT3 inhibition, but induces a G 1 arrest independent of DRD2. J Biol Chem 2018; 293:15977-15990. [PMID: 30131338 PMCID: PMC6187640 DOI: 10.1074/jbc.ra118.003719] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2018] [Revised: 07/26/2018] [Indexed: 01/11/2023] Open
Abstract
Thioridazine is an antipsychotic that has been shown to induce cell death and inhibit self-renewal in a broad spectrum of cancer cells. The mechanisms by which these effects are mediated are currently unknown but are presumed to result from the inhibition of dopamine receptor 2 (DRD2). Here we show that the self-renewal of several, but not all, triple-negative breast cancer cell lines is inhibited by thioridazine. The inhibition of self-renewal by thioridazine in these cells is mediated by DRD2 inhibition. Further, we demonstrate that DRD2 promotes self-renewal in these cells via a STAT3- and IL-6-dependent mechanism. We also show that thioridazine induces a G1 arrest and a loss in cell viability in all tested cell lines. However, the reduction in proliferation and cell viability is independent of DRD2 and STAT3. Our results indicate that although there are cell types in which DRD2 inhibition results in inhibition of STAT3 and self-renewal, the dramatic block in cancer cell proliferation across many cell lines caused by thioridazine treatment is independent of DRD2 inhibition.
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Affiliation(s)
- Matthew Tegowski
- From the Curriculum of Genetics and Molecular Biology, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599 and
- Lineberger Comprehensive Cancer Center, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599
| | - Cheng Fan
- Lineberger Comprehensive Cancer Center, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599
| | - Albert S Baldwin
- From the Curriculum of Genetics and Molecular Biology, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599 and
- Lineberger Comprehensive Cancer Center, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599
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Zunke F, Rose-John S. The shedding protease ADAM17: Physiology and pathophysiology. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2017; 1864:2059-2070. [DOI: 10.1016/j.bbamcr.2017.07.001] [Citation(s) in RCA: 215] [Impact Index Per Article: 30.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2017] [Revised: 07/08/2017] [Accepted: 07/09/2017] [Indexed: 02/07/2023]
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Choi MH, Na JE, Yoon YR, Lee HJ, Yoon S, Rhyu IJ, Baik JH. Role of Dopamine D2 Receptor in Stress-Induced Myelin Loss. Sci Rep 2017; 7:11654. [PMID: 28912499 PMCID: PMC5599541 DOI: 10.1038/s41598-017-10173-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Accepted: 08/04/2017] [Indexed: 12/24/2022] Open
Abstract
Dopaminergic systems play a major role in reward-related behavior and dysregulation of dopamine (DA) systems can cause several mental disorders, including depression. We previously reported that dopamine D2 receptor knockout (D2R-/-) mice display increased anxiety and depression-like behaviors upon chronic stress. Here, we observed that chronic stress caused myelin loss in wild-type (WT) mice, while the myelin level in D2R-/- mice, which was already lower than that in WT mice, was not affected upon stress. Fewer mature oligodendrocytes (OLs) were observed in the corpus callosum of stressed WT mice, while in D2R-/- mice, both the control and stressed group displayed a decrease in the number of mature OLs. We observed a decrease in the number of active β-catenin (ABC)-expressing and TCF4-expressing cells among OL lineage cells in the corpus callosum of stressed WT mice, while such regulation was not found in D2R-/- mice. Administration of lithium normalized the behavioral impairments and myelin damage induced by chronic stress in WT mice, and restored the number of ABC-positive and TCF4-positive OLs, while such effect was not found in D2R-/- mice. Together, our findings indicate that chronic stress induces myelin loss through the Wnt/β-catenin signaling pathway in association with DA signaling through D2R.
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Affiliation(s)
- Mi-Hyun Choi
- Molecular Neurobiology Laboratory, Department of Life Sciences, Korea University, Seoul, 02841, Korea
| | - Ji Eun Na
- Department of Anatomy, College of Medicine, Korea University, Seoul, 02841, Korea
| | - Ye Ran Yoon
- Molecular Neurobiology Laboratory, Department of Life Sciences, Korea University, Seoul, 02841, Korea
| | - Hyo Jin Lee
- Molecular Neurobiology Laboratory, Department of Life Sciences, Korea University, Seoul, 02841, Korea
| | - Sehyoun Yoon
- Molecular Neurobiology Laboratory, Department of Life Sciences, Korea University, Seoul, 02841, Korea
| | - Im Joo Rhyu
- Department of Anatomy, College of Medicine, Korea University, Seoul, 02841, Korea
| | - Ja-Hyun Baik
- Molecular Neurobiology Laboratory, Department of Life Sciences, Korea University, Seoul, 02841, Korea.
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Role of Dopamine D2/D3 Receptors in Development, Plasticity, and Neuroprotection in Human iPSC-Derived Midbrain Dopaminergic Neurons. Mol Neurobiol 2017; 55:1054-1067. [DOI: 10.1007/s12035-016-0376-3] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2016] [Accepted: 12/28/2016] [Indexed: 01/11/2023]
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12
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Meinhardt G, Saleh L, Otti GR, Haider S, Velicky P, Fiala C, Pollheimer J, Knöfler M. Wingless ligand 5a is a critical regulator of placental growth and survival. Sci Rep 2016; 6:28127. [PMID: 27311852 PMCID: PMC4911582 DOI: 10.1038/srep28127] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2015] [Accepted: 06/01/2016] [Indexed: 12/26/2022] Open
Abstract
The maternal uterine environment is likely critical for human placental morphogenesis and development of its different trophoblast subtypes. However, factors controlling growth and differentiation of these cells during early gestation remain poorly elucidated. Herein, we provide evidence that the ligand Wnt5a could be a critical regulator of trophoblast proliferation and survival. Immunofluorescence of tissues and western blot analyses of primary cultures revealed abundant Wnt5a expression and secretion from first trimester decidual and villous stromal cells. The ligand was also detectable in decidual glands, macrophages and NK cells. Wnt5a increased proliferation of villous cytotrophoblasts and cell column trophoblasts, outgrowth on collagen I as well as cyclin A and D1 expression in floating explant cultures, but suppressed camptothecin-induced apoptosis. Similarly, Wnt5a stimulated BrdU incorporation and decreased caspase-cleaved cytokeratin 18 neo-epitope expression in primary cytotrophoblasts. Moreover, Wnt5a promoted activation of the MAPK pathway in the different trophoblast models. Chemical inhibition of p42/44 MAPK abolished cyclin D1 expression and Wnt5a-stimulated proliferation. Compared to controls, MAPK phosphorylation and proliferation of cytotrophoblasts declined upon supplementation of supernatants from Wnt5a gene-silenced decidual or villous stromal cells. In summary, non-canonical Wnt5a signalling could play a role in early human trophoblast development by promoting cell proliferation and survival.
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Affiliation(s)
- Gudrun Meinhardt
- Department of Obstetrics and Gynecology, Reproductive Biology Unit; Medical University of Vienna, Vienna, Austria
| | - Leila Saleh
- Department of Obstetrics and Gynecology, Reproductive Biology Unit; Medical University of Vienna, Vienna, Austria
| | - Gerlinde R. Otti
- Department of Obstetrics and Gynecology, Reproductive Biology Unit; Medical University of Vienna, Vienna, Austria
| | - Sandra Haider
- Department of Obstetrics and Gynecology, Reproductive Biology Unit; Medical University of Vienna, Vienna, Austria
| | - Philipp Velicky
- Department of Obstetrics and Gynecology, Reproductive Biology Unit; Medical University of Vienna, Vienna, Austria
| | | | - Jürgen Pollheimer
- Department of Obstetrics and Gynecology, Reproductive Biology Unit; Medical University of Vienna, Vienna, Austria
| | - Martin Knöfler
- Department of Obstetrics and Gynecology, Reproductive Biology Unit; Medical University of Vienna, Vienna, Austria
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Fiorentini C, Savoia P, Bono F, Tallarico P, Missale C. The D3 dopamine receptor: From structural interactions to function. Eur Neuropsychopharmacol 2015; 25:1462-9. [PMID: 25532864 DOI: 10.1016/j.euroneuro.2014.11.021] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/20/2014] [Revised: 11/10/2014] [Accepted: 11/24/2014] [Indexed: 01/17/2023]
Abstract
Novel structural and functional aspects of the dopamine (DA) D3 receptors (D3R) have been recently described. D3R expressed in dopaminergic neurons have been classically considered to play the role of autoreceptors inhibiting, as the D2R, DA release. However, evidence for D3R-mediated neurotrophic and neuroprotective effects on DA neurons suggests their involvement in preventing pathological alterations leading to neurodegeneration. On the other hand, given its localization and functional role at postsynaptic striatal levels, the D3R may also be involved in the pathogenesis of movement disorders and psychiatric diseases. Functional interactions of D3R with other receptor systems are crucial for the modulation of several physiological events. On this line, the discovery that the D3R can form heteromers with other receptors has opened the possibility of uncover novel molecular mechanisms of brain functions and dysfunctions. This paper summarizes the functional and physical interactions of D3R with other receptors both at pre-synaptic sites, where it is co-expressed with the D2R and nicotinic receptors, and at post-synaptic sites where it interacts with the DA D1 receptors (D1R). The biochemical and functional properties of the D1R-D3R heteromer will be especially discussed. Both D1R and D3R have been in fact implicated in several disorders, including schizophrenia and motor dysfunctions. Therefore, the D1R-D3R heteromer may represent a potential drug target for the treatment of these diseases.
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Affiliation(s)
- Chiara Fiorentini
- Section of Pharmacology, Department of Molecular and Translational Medicine, University of Brescia, Viale Europa 11, 25123 Brescia, Italy.
| | - Paola Savoia
- Section of Pharmacology, Department of Molecular and Translational Medicine, University of Brescia, Viale Europa 11, 25123 Brescia, Italy
| | - Federica Bono
- Section of Pharmacology, Department of Molecular and Translational Medicine, University of Brescia, Viale Europa 11, 25123 Brescia, Italy
| | - Paola Tallarico
- Section of Pharmacology, Department of Molecular and Translational Medicine, University of Brescia, Viale Europa 11, 25123 Brescia, Italy
| | - Cristina Missale
- Section of Pharmacology, Department of Molecular and Translational Medicine, University of Brescia, Viale Europa 11, 25123 Brescia, Italy
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ERK1, 2, and 5 expression and activation in dopaminergic brain regions during postnatal development. Int J Dev Neurosci 2015; 46:44-50. [PMID: 26363522 DOI: 10.1016/j.ijdevneu.2015.06.009] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2015] [Revised: 06/22/2015] [Accepted: 06/23/2015] [Indexed: 11/23/2022] Open
Abstract
Degeneration and dysfunctioning of dopaminergic neurons in the midbrain have been associated with serious neurodegenerative and neuropsychiatric disorders. Elucidating the underlying neurobiology of these neurons during early postnatal development may provide important information regarding the etiology of these disorders. Cellular signaling pathways have been shown to regulate postnatal neuronal development. Among several signaling pathways, extracellular-regulated mitogen kinases (ERK) 1, 2, and 5 have been shown to be crucial for the survival and function of dopaminergic neurons. In this study, the basal expression and activation of ERK1, 2, and 5 were studied during postnatal development in regions rich in DA cells and terminals. In the striatum (STR) and ventral mesencephalon regions of the substantia nigra (SN) and ventral tegmental area (VTA), ERK5 expression and activation were high during early postnatal days and declined with aging. Interestingly, sharp increases in phosphorylated or activated ERK1 and ERK2 were observed at postnatal day (PND) 7 in the SN and VTA. In contrast, in the STR, the levels of phosphorylated ERK1 and 2 were significantly higher at PND0 than at any other PND examined. Overall, the understanding of alterations in ERK signaling in regions rich in DA cells and DA terminals during postnatal neuronal development may provide information about their role in regulation of dopamine neuronal development which may ultimately provide insight into the underlying mechanisms of dopamine neurodegeneration.
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15
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Amin SN, Gamal SM, Esmail RSEN, Aziz TMA, Rashed LA. Cognitive effects of acute restraint stress in male albino rats and the impact of pretreatment with quetiapine versus ghrelin. J Integr Neurosci 2015; 13:669-92. [PMID: 25391717 DOI: 10.1142/s0219635214500253] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
Stress is any condition that seriously affects the balance of the organism physiologically and psychologically. Stress activates the hypothalamic-pituitary-adrenal (HPA) releasing glucocorticoid hormones that produce generalized effects on different body systems including the nervous system. This study aimed to investigate the effect of acute restraint stress (ARS) on cognitive performance by measuring spatial working memory in Y-maze, behavior (anxiety and exploratory behavior) in open field test, expression of synaptophysin and glial fibrillary acidic protein (GFAP) in the hippocampus by immunohistochemistry, dopaminergic receptors (D2) in the basal ganglia by gene expression and comparing the effect of ghrelin and quetiapine on the previous parameters. 36 adult male albino rats constituted the animal model of this work and have been divided into six groups: control group, control group exposed to ARS, quetiapine group, quetiapine group exposed to ARS, ghrelin group and ghrelin group exposed to ARS. We demonstrated more neuroprotective effect for quetiapine compared to ghrelin on stress response, anxiety behavior and working spatial memory impairment due to ARS.
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Affiliation(s)
- Shaimaa Nasr Amin
- Department of Medical Physiology, Kasr Al Ainy Faculty of Medicine, Cairo University, Kasr Al Ainy St. Cairo, Egypt 11562, Egypt
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16
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Brust TF, Conley JM, Watts VJ. Gα(i/o)-coupled receptor-mediated sensitization of adenylyl cyclase: 40 years later. Eur J Pharmacol 2015; 763:223-32. [PMID: 25981304 DOI: 10.1016/j.ejphar.2015.05.014] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2015] [Revised: 03/02/2015] [Accepted: 05/11/2015] [Indexed: 12/20/2022]
Abstract
Heterologous sensitization of adenylyl cyclase (also referred to as superactivation, sensitization, or supersensitization of adenylyl cyclase) is a cellular adaptive response first described 40 years ago in the laboratory of Dr. Marshall Nirenberg. This apparently paradoxical cellular response occurs following persistent activation of Gαi/o-coupled receptors and causes marked enhancement in the activity of adenylyl cyclases, thereby increasing cAMP production. Since our last review in 2005, significant progress in the field has led to a better understanding of the relevance of, and the cellular biochemical processes that occur during the development and expression of heterologous sensitization. In this review we will discuss the recent advancements in the field and the mechanistic hypotheses on heterologous sensitization.
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Affiliation(s)
- Tarsis F Brust
- Department of Medicinal Chemistry and Molecular Pharmacology, College of Pharmacy, Purdue University, 575 Stadium Mall Drive, West Lafayette, IN 47907, USA
| | - Jason M Conley
- Department of Medicinal Chemistry and Molecular Pharmacology, College of Pharmacy, Purdue University, 575 Stadium Mall Drive, West Lafayette, IN 47907, USA
| | - Val J Watts
- Department of Medicinal Chemistry and Molecular Pharmacology, College of Pharmacy, Purdue University, 575 Stadium Mall Drive, West Lafayette, IN 47907, USA.
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17
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Yoon DH, Yoon S, Kim D, Kim H, Baik JH. Regulation of dopamine D2 receptor-mediated extracellular signal-regulated kinase signaling and spine formation by GABAA receptors in hippocampal neurons. Neurosci Lett 2014; 586:24-30. [PMID: 25483619 DOI: 10.1016/j.neulet.2014.12.010] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2014] [Revised: 11/12/2014] [Accepted: 12/02/2014] [Indexed: 01/11/2023]
Abstract
Dopamine (DA) signaling via DA receptors is known to control hippocampal activity that contributes to learning, memory, and synaptic plasticity. In primary hippocampal neuronal culture, we observed that dopamine D2 receptors (D2R) co-localized with certain subtypes of GABAA receptors, namely α1, β3, and γ2 subunits, as revealed by double immunofluorocytochemical analysis. Treatment with the D2R agonist, quinpirole, was shown to elicit an increase in phosphorylation of extracellular signal-regulated kinase (ERK) in hippocampal neurons. This phosphorylation was inhibited by pretreatment with the GABAA receptor agonist, muscimol. Furthermore, treatment of hippocampal neurons with quinpirole increased the dendritic spine density and this regulation was totally blocked by pretreatment with a MAP kinase kinase (MEK) inhibitor (PD98059), D2R antagonist (haloperidol), or by the GABAA receptor agonist, muscimol. These results suggest that D2R-mediated ERK phosphorylation can control spine formation and that the GABAA receptor negatively regulates the D2R-induced spine formation through ERK signaling in hippocampal neurons, thus indicating a potential role of D2R in the control of hippocampal neuronal excitability.
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Affiliation(s)
- Dong-Hoon Yoon
- Molecular Neurobiology Laboratory, Department of Life Sciences, College of Life Sciences and Biotechnology, Korea University, Seoul 136-701, South Korea
| | - Sehyoun Yoon
- Molecular Neurobiology Laboratory, Department of Life Sciences, College of Life Sciences and Biotechnology, Korea University, Seoul 136-701, South Korea
| | - Donghoon Kim
- Molecular Neurobiology Laboratory, Department of Life Sciences, College of Life Sciences and Biotechnology, Korea University, Seoul 136-701, South Korea
| | - Hyun Kim
- Department of Anatomy, College of Medicine, Korea University, Brain Korea 21, Seoul 136-705, South Korea
| | - Ja-Hyun Baik
- Molecular Neurobiology Laboratory, Department of Life Sciences, College of Life Sciences and Biotechnology, Korea University, Seoul 136-701, South Korea.
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18
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Pistillo F, Clementi F, Zoli M, Gotti C. Nicotinic, glutamatergic and dopaminergic synaptic transmission and plasticity in the mesocorticolimbic system: focus on nicotine effects. Prog Neurobiol 2014; 124:1-27. [PMID: 25447802 DOI: 10.1016/j.pneurobio.2014.10.002] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2014] [Revised: 10/08/2014] [Accepted: 10/24/2014] [Indexed: 01/11/2023]
Abstract
Cigarette smoking is currently the leading cause of preventable deaths and disability throughout the world, being responsible for about five million premature deaths/year. Unfortunately, fewer than 10% of tobacco users who try to stop smoking actually manage to do so. The main addictive agent delivered by cigarette smoke is nicotine, which induces psychostimulation and reward, and reduces stress and anxiety. The use of new technologies (including optogenetics) and the development of mouse models characterised by cell-specific deletions of receptor subtype genes or the expression of gain-of-function nAChR subunits has greatly increased our understanding of the molecular mechanisms and neural substrates of nicotine addiction first revealed by classic electrophysiological, neurochemical and behavioural approaches. It is now becoming clear that various aspects of nicotine dependence are mediated by close interactions of the glutamatergic, dopaminergic and γ-aminobutyric acidergic systems in the mesocorticolimbic system. This review is divided into two parts. The first provides an updated overview of the circuitry of the ventral tegmental area, ventral striatum and prefrontal cortex, the neurotransmitter receptor subtypes expressed in these areas, and their physiological role in the mesocorticolimbic system. The second will focus on the molecular, functional and behavioural mechanisms involved in the acute and chronic effects of nicotine on the mesocorticolimbic system.
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Affiliation(s)
- Francesco Pistillo
- CNR, Neuroscience Institute-Milano, Biometra University of Milan, Milan, Italy
| | - Francesco Clementi
- CNR, Neuroscience Institute-Milano, Biometra University of Milan, Milan, Italy
| | - Michele Zoli
- Department of Biomedical, Metabolic and Neural Sciences, Section of Physiology and Neurosciences, University of Modena and Reggio Emilia, Modena, Italy.
| | - Cecilia Gotti
- CNR, Neuroscience Institute-Milano, Biometra University of Milan, Milan, Italy.
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19
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Abstract
Dopamine (DA) regulates emotional and motivational behavior through the mesolimbic dopaminergic pathway. Changes in DA signaling in mesolimbic neurotransmission are widely believed to modify reward-related behaviors and are therefore closely associated with drug addiction. Recent evidence now suggests that as with drug addiction, obesity with compulsive eating behaviors involves reward circuitry of the brain, particularly the circuitry involving dopaminergic neural substrates. Increasing amounts of data from human imaging studies, together with genetic analysis, have demonstrated that obese people and drug addicts tend to show altered expression of DA D2 receptors in specific brain areas, and that similar brain areas are activated by food-related and drug-related cues. This review focuses on the functions of the DA system, with specific focus on the physiological interpretation and the role of DA D2 receptor signaling in food addiction. [BMB Reports 2013; 46(11): 519-526]
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Affiliation(s)
- Ja-Hyun Baik
- Molecular Neurobiology Laboratory, Department of Life Sciences, Korea University, Seoul 136-701, Korea
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20
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Kwon YW, Chung YJ, Kim J, Lee HJ, Park J, Roh TY, Cho HJ, Yoon CH, Koo BK, Kim HS. Comparative study of efficacy of dopaminergic neuron differentiation between embryonic stem cell and protein-based induced pluripotent stem cell. PLoS One 2014; 9:e85736. [PMID: 24465672 PMCID: PMC3899054 DOI: 10.1371/journal.pone.0085736] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2013] [Accepted: 12/01/2013] [Indexed: 11/29/2022] Open
Abstract
In patients with Parkinson's disease (PD), stem cells can serve as therapeutic agents to restore or regenerate injured nervous system. Here, we differentiated two types of stem cells; mouse embryonic stem cells (mESCs) and protein-based iPS cells (P-iPSCs) generated by non-viral methods, into midbrain dopaminergic (mDA) neurons, and then compared the efficiency of DA neuron differentiation from these two cell types. In the undifferentiated stage, P-iPSCs expressed pluripotency markers as ES cells did, indicating that protein-based reprogramming was stable and authentic. While both stem cell types were differentiated to the terminally-matured mDA neurons, P-iPSCs showed higher DA neuron-specific markers' expression than ES cells. To investigate the mechanism of the superior induction capacity of DA neurons observed in P-iPSCs compared to ES cells, we analyzed histone modifications by genome-wide ChIP sequencing analysis and their corresponding microarray results between two cell types. We found that Wnt signaling was up-regulated, while SFRP1, a counter-acting molecule of Wnt, was more suppressed in P-iPSCs than in mESCs. In PD rat model, transplantation of neural precursor cells derived from both cell types showed improved function. The present study demonstrates that P-iPSCs could be a suitable cell source to provide patient-specific therapy for PD without ethical problems or rejection issues.
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Affiliation(s)
- Yoo-Wook Kwon
- National Research Laboratory for Stem Cell Niche, Seoul National University Hospital, Seoul, Korea
- Innovative Research Institute for Cell Therapy, Seoul National University Hospital, Seoul, Korea
| | - Yeon-Ju Chung
- National Research Laboratory for Stem Cell Niche, Seoul National University Hospital, Seoul, Korea
- Innovative Research Institute for Cell Therapy, Seoul National University Hospital, Seoul, Korea
| | - Joonoh Kim
- National Research Laboratory for Stem Cell Niche, Seoul National University Hospital, Seoul, Korea
- Innovative Research Institute for Cell Therapy, Seoul National University Hospital, Seoul, Korea
| | - Ho-Jae Lee
- National Research Laboratory for Stem Cell Niche, Seoul National University Hospital, Seoul, Korea
- Innovative Research Institute for Cell Therapy, Seoul National University Hospital, Seoul, Korea
| | - Jihwan Park
- Division of Molecular and Life Sciences,Pohang University of Science and Technology, Pohang, Korea
| | - Tae-Young Roh
- Division of Molecular and Life Sciences,Pohang University of Science and Technology, Pohang, Korea
| | - Hyun-Jai Cho
- National Research Laboratory for Stem Cell Niche, Seoul National University Hospital, Seoul, Korea
- Innovative Research Institute for Cell Therapy, Seoul National University Hospital, Seoul, Korea
- Department of Internal Medicine, Seoul National University, Seoul, Korea
| | - Chang-Hwan Yoon
- Cardiovascular center, Seoul National University Bundang Hospital, Seoul National University, Seoul, Korea
| | - Bon-Kwon Koo
- Department of Internal Medicine, Seoul National University, Seoul, Korea
| | - Hyo-Soo Kim
- National Research Laboratory for Stem Cell Niche, Seoul National University Hospital, Seoul, Korea
- Innovative Research Institute for Cell Therapy, Seoul National University Hospital, Seoul, Korea
- Department of Internal Medicine, Seoul National University, Seoul, Korea
- Molecular Medicine and Biopharmaceutical Sciences, Seoul National University, Seoul, Korea
- * E-mail:
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21
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Hunt CP, Fabb SA, Pouton CW, Haynes JM. DNA-dependent protein kinase is a context dependent regulator of Lmx1a and midbrain specification. PLoS One 2013; 8:e78759. [PMID: 24194952 PMCID: PMC3806860 DOI: 10.1371/journal.pone.0078759] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2013] [Accepted: 09/18/2013] [Indexed: 11/30/2022] Open
Abstract
The identification of small molecules capable of directing pluripotent cell differentiation towards specific lineages is highly desirable to both reduce cost, and increase efficiency. Within neural progenitors, LIM homeobox transcription factor 1 alpha (Lmx1a) is required for proper development of roof plate and cortical hem structures of the forebrain, as well as the development of floor plate and midbrain dopaminergic neurons. In this study we generated homologous recombinant cell lines expressing either luciferase or β-lactamase under the control of the Lmx1a promoter, and used these cell lines to investigate kinase-mediated regulation of Lmx1a activity during neuronal differentiation. A screen of 143 small molecule tyrosine kinase inhibitors yielded 16 compounds that positively or negatively modulated Lmx1a activity. Inhibition of EGF, VEGF and DNA-dependent protein kinase (DNA-PK) signaling significantly upregulated Lmx1a activity whereas MEK inhibition strongly downregulated its activity. Quantitative FACS analysis revealed that the DNA-PK inhibitor significantly increased the number of Lmx1a+ progenitors while subsequent qPCR showed an upregulation of Notch effectors, the basic helix-loop-helix genes, Hes5 and Hey1. FACS further revealed that DNA-PK-mediated regulation of Lmx1a+ cells is dependent on the rapamycin-sensitive complex, mTORC1. Interestingly, this DNA-PK inhibitor effect was preserved in a co-culture differentiation protocol. Terminal differentiation assays showed that DNA-PK inhibition shifted development of neurons from forebrain toward midbrain character as assessed by Pitx3/TH immunolabeling and corresponding upregulation of midbrain (En1), but not forebrain (FoxG1) transcripts. These studies show that Lmx1a signaling in mouse embryonic stem cells contributes to a molecular cascade establishing neuronal specification. The data presented here identifies a novel regulatory pathway where signaling from DNA-PK appears to suppress midbrain-specific Lmx1a expression.
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Affiliation(s)
- Cameron P. Hunt
- Drug Discovery Biology, Monash Institute of Pharmaceutical Sciences, Monash University (Parkville), Melbourne, Australia
| | - Stewart A. Fabb
- Drug Discovery Biology, Monash Institute of Pharmaceutical Sciences, Monash University (Parkville), Melbourne, Australia
| | - Colin W. Pouton
- Drug Discovery Biology, Monash Institute of Pharmaceutical Sciences, Monash University (Parkville), Melbourne, Australia
- * E-mail: (JMH); (CWP)
| | - John M. Haynes
- Drug Discovery Biology, Monash Institute of Pharmaceutical Sciences, Monash University (Parkville), Melbourne, Australia
- * E-mail: (JMH); (CWP)
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22
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Baik JH. Dopamine signaling in reward-related behaviors. Front Neural Circuits 2013; 7:152. [PMID: 24130517 PMCID: PMC3795306 DOI: 10.3389/fncir.2013.00152] [Citation(s) in RCA: 296] [Impact Index Per Article: 26.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2013] [Accepted: 09/11/2013] [Indexed: 12/20/2022] Open
Abstract
Dopamine (DA) regulates emotional and motivational behavior through the mesolimbic dopaminergic pathway. Changes in DA mesolimbic neurotransmission have been found to modify behavioral responses to various environmental stimuli associated with reward behaviors. Psychostimulants, drugs of abuse, and natural reward such as food can cause substantial synaptic modifications to the mesolimbic DA system. Recent studies using optogenetics and DREADDs, together with neuron-specific or circuit-specific genetic manipulations have improved our understanding of DA signaling in the reward circuit, and provided a means to identify the neural substrates of complex behaviors such as drug addiction and eating disorders. This review focuses on the role of the DA system in drug addiction and food motivation, with an overview of the role of D1 and D2 receptors in the control of reward-associated behaviors.
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Affiliation(s)
- Ja-Hyun Baik
- Molecular Neurobiology Laboratory, Department of Life Sciences, Korea University Seoul, South Korea
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23
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Yoon S, Baik JH. Dopamine D2 receptor-mediated epidermal growth factor receptor transactivation through a disintegrin and metalloprotease regulates dopaminergic neuron development via extracellular signal-related kinase activation. J Biol Chem 2013; 288:28435-46. [PMID: 23955337 DOI: 10.1074/jbc.m113.461202] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Dopamine D2 receptor (D2R)-mediated extracellular signal-regulated kinase (ERK) activation plays an important role in the development of dopaminergic mesencephalic neurons. Here, we demonstrate that D2R induces the shedding of heparin-binding epidermal growth factor (EGF) through the activation of a disintegrin and metalloprotease (ADAM) 10 or 17, leading to EGF receptor transactivation, downstream ERK activation, and ultimately an increase in the number of dopaminergic neurons and their neurite length in primary mesencephalic cultures from wild-type mice. These outcomes, however, were not observed in cultures from D2R knock-out mice. Our findings show that D2R-mediated ERK activation regulates mesencephalic dopaminergic neuron development via EGF receptor transactivation through ADAM10/17.
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Affiliation(s)
- Sehyoun Yoon
- From the Molecular Neurobiology Laboratory, College of Life Sciences and Biotechnology, Korea University, Seoul 136-701, South Korea
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24
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Han J, Kim YL, Lee KW, Her NG, Ha TK, Yoon S, Jeong SI, Lee JH, Kang MJ, Lee MG, Ryu BK, Baik JH, Chi SG. ZNF313 is a novel cell cycle activator with an E3 ligase activity inhibiting cellular senescence by destabilizing p21(WAF1.). Cell Death Differ 2013; 20:1055-67. [PMID: 23645206 DOI: 10.1038/cdd.2013.33] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2012] [Revised: 03/21/2013] [Accepted: 03/27/2013] [Indexed: 02/02/2023] Open
Abstract
ZNF313 encoding a zinc-binding protein is located at chromosome 20q13.13, which exhibits a frequent genomic amplification in multiple human cancers. However, the biological function of ZNF313 remains largely undefined. Here we report that ZNF313 is an ubiquitin E3 ligase that has a critical role in the regulation of cell cycle progression, differentiation and senescence. In this study, ZNF313 is initially identified as a XIAP-associated factor 1 (XAF1)-interacting protein, which upregulates the stability and proapoptotic effect of XAF1. Intriguingly, we found that ZNF313 activates cell cycle progression and suppresses cellular senescence through the RING domain-mediated degradation of p21(WAF1). ZNF313 ubiquitinates p21(WAF1) and also destabilizes p27(KIP1) and p57(KIP2), three members of the CDK-interacting protein (CIP)/kinase inhibitor protein (KIP) family of cyclin-dependent kinase inhibitors, whereas it does not affect the stability of the inhibitor of CDK (INK4) family members, such as p16(INK4A) and p15(INK4B). ZNF313 expression is tightly controlled during the cell cycle and its elevation at the late G1 phase is crucial for the G1-to-S phase transition. ZNF313 is induced by mitogenic growth factors and its blockade profoundly delays cell cycle progression and accelerates p21(WAF1)-mediated senescence. Both replicative and stress-induced senescence are accompanied with ZNF313 reduction. ZNF313 is downregulated during cellular differentiation process in vitro and in vivo, while it is commonly upregulated in many types of cancer cells. ZNF313 shows both the nuclear and cytoplasmic localization in epithelial cells of normal tissues, but exhibits an intense cytoplasmic distribution in carcinoma cells of tumor tissues. Collectively, ZNF313 is a novel E3 ligase for p21(WAF1), whose alteration might be implicated in the pathogenesis of several human diseases, including cancers.
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Affiliation(s)
- J Han
- School of Life Sciences and Biotechnology, Korea University, Seoul, Republic of Korea
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25
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Sim HR, Choi TY, Lee HJ, Kang EY, Yoon S, Han PL, Choi SY, Baik JH. Role of dopamine D2 receptors in plasticity of stress-induced addictive behaviours. Nat Commun 2013; 4:1579. [DOI: 10.1038/ncomms2598] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2012] [Accepted: 02/12/2013] [Indexed: 12/14/2022] Open
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26
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Siddiqui S, Fang M, Ni B, Lu D, Martin B, Maudsley S. Central role of the EGF receptor in neurometabolic aging. Int J Endocrinol 2012; 2012:739428. [PMID: 22754566 PMCID: PMC3382947 DOI: 10.1155/2012/739428] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/30/2012] [Accepted: 05/01/2012] [Indexed: 12/20/2022] Open
Abstract
A strong connection between neuronal and metabolic health has been revealed in recent years. It appears that both normal and pathophysiological aging, as well as neurodegenerative disorders, are all profoundly influenced by this "neurometabolic" interface, that is, communication between the brain and metabolic organs. An important aspect of this "neurometabolic" axis that needs to be investigated involves an elucidation of molecular factors that knit these two functional signaling domains, neuronal and metabolic, together. This paper attempts to identify and discuss a potential keystone signaling factor in this "neurometabolic" axis, that is, the epidermal growth factor receptor (EGFR). The EGFR has been previously demonstrated to act as a signaling nexus for many ligand signaling modalities and cellular stressors, for example, radiation and oxidative radicals, linked to aging and degeneration. The EGFR is expressed in a wide variety of cells/tissues that pertain to the coordinated regulation of neurometabolic activity. EGFR signaling has been highlighted directly or indirectly in a spectrum of neurometabolic conditions, for example, metabolic syndrome, diabetes, Alzheimer's disease, cancer, and cardiorespiratory function. Understanding the positioning of the EGFR within the neurometabolic domain will enhance our appreciation of the ability of this receptor system to underpin highly complex physiological paradigms such as aging and neurodegeneration.
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Affiliation(s)
- Sana Siddiqui
- Receptor Pharmacology Unit, National Institute on Aging, Baltimore, MD 21224, USA
| | - Meng Fang
- Receptor Pharmacology Unit, National Institute on Aging, Baltimore, MD 21224, USA
| | - Bin Ni
- Receptor Pharmacology Unit, National Institute on Aging, Baltimore, MD 21224, USA
| | - Daoyuan Lu
- Receptor Pharmacology Unit, National Institute on Aging, Baltimore, MD 21224, USA
| | - Bronwen Martin
- Metabolism Unit, National Institute on Aging, Baltimore, MD 21224, USA
| | - Stuart Maudsley
- Receptor Pharmacology Unit, National Institute on Aging, Baltimore, MD 21224, USA
- *Stuart Maudsley:
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