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Zhang C, Ni C, Lu H. Polo-Like Kinase 2: From Principle to Practice. Front Oncol 2022; 12:956225. [PMID: 35898867 PMCID: PMC9309260 DOI: 10.3389/fonc.2022.956225] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Accepted: 06/14/2022] [Indexed: 11/21/2022] Open
Abstract
Polo-like kinase (PLK) 2 is an evolutionarily conserved serine/threonine kinase that shares the n-terminal kinase catalytic domain and the C-terminal Polo Box Domain (PBD) with other members of the PLKs family. In the last two decades, mounting studies have focused on this and tried to clarify its role in many aspects. PLK2 is essential for mitotic centriole replication and meiotic chromatin pairing, synapsis, and crossing-over in the cell cycle; Loss of PLK2 function results in cell cycle disorders and developmental retardation. PLK2 is also involved in regulating cell differentiation and maintaining neural homeostasis. In the process of various stimuli-induced stress, including oxidative and endoplasmic reticulum, PLK2 may promote survival or apoptosis depending on the intensity of stimulation and the degree of cell damage. However, the role of PLK2 in immunity to viral infection has been studied far less than that of other family members. Because PLK2 is extensively and deeply involved in normal physiological functions and pathophysiological mechanisms of cells, its role in diseases is increasingly being paid attention to. The effect of PLK2 in inhibiting hematological tumors and fibrotic diseases, as well as participating in neurodegenerative diseases, has been gradually recognized. However, the research results in solid organ tumors show contradictory results. In addition, preliminary studies using PLK2 as a disease predictor and therapeutic target have yielded some exciting and promising results. More research will help people better understand PLK2 from principle to practice.
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Affiliation(s)
- Chuanyong Zhang
- Hepatobiliary Center, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
- Key Laboratory of Liver Transplantation, Chinese Academy of Medical Sciences, Nanjing, China
| | - Chuangye Ni
- Hepatobiliary Center, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
- Key Laboratory of Liver Transplantation, Chinese Academy of Medical Sciences, Nanjing, China
| | - Hao Lu
- Hepatobiliary Center, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
- Key Laboratory of Liver Transplantation, Chinese Academy of Medical Sciences, Nanjing, China
- *Correspondence: Hao Lu,
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Rodríguez-Nogales C, Garbayo E, Martínez-Valbuena I, Sebastián V, Luquin MR, Blanco-Prieto MJ. Development and characterization of polo-like kinase 2 loaded nanoparticles-A novel strategy for (serine-129) phosphorylation of alpha-synuclein. Int J Pharm 2017; 514:142-149. [PMID: 27863657 DOI: 10.1016/j.ijpharm.2016.06.044] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2016] [Revised: 06/16/2016] [Accepted: 06/17/2016] [Indexed: 10/20/2022]
Abstract
Polo like kinase 2 (PLK2), a serine/threonine serum inducible kinase, has been proposed to be the major factor responsible for phosphorylating alpha-synuclein (α-syn) at Serine-129 (Ser-129) in Parkinson's disease (PD). A suitable strategy to gain insights into PLK2's biological effects might be to increase PLK2 intracellular levels with the aim of reproducing the slow progressive neuronal changes that occur in PD. The goal of this study was to develop and characterize a novel drug delivery system (DDS) for PLK2 cytosolic delivery using Total recirculating one machine system (TROMS), a technique capable of encapsulating fragile molecules while maintaining their native properties. A protocol for nanoparticle (NP) preparation using TROMS was set up. NPs showed a mean diameter of 257±15.61nm and zeta potential of -16±2mV, suitable for cell internalization. TEM and SEM images showed individual, spherical, dispersed NPs. The drug entrapment efficacy was 61.86±3.9%. PLK2-NPs were able to enter SH-SY5Y cells and phosphorylate α-syn at Ser-129, demonstrating that the enzyme retained its activity after the NP manufacturing process. This is the first study to develop a DDS for continuous intracellular delivery of PLK2. These promising results indicate that this novel nanotechnology approach could be used to elucidate the biological effects of PLK2 on dopaminergic neurons.
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Affiliation(s)
- C Rodríguez-Nogales
- Pharmacy and Pharmaceutical Technology Department, University of Navarra, Pamplona, Spain
| | - E Garbayo
- Pharmacy and Pharmaceutical Technology Department, University of Navarra, Pamplona, Spain; Instituto de Investigación Sanitaria de Navarra (IDISNA), Pamplona, Spain
| | | | - V Sebastián
- Chemical & Environmental Engineering Department & Nanoscience Institute of Aragon, University of Zaragoza, Zaragoza, Spain; Networking Research Center on Bioengineering, Biomaterials and Nanomedicine, CIBER-BBN, Madrid, Spain
| | - M R Luquin
- Instituto de Investigación Sanitaria de Navarra (IDISNA), Pamplona, Spain; Department of Neurology, Clínica Universidad de Navarra, Pamplona, Spain
| | - M J Blanco-Prieto
- Pharmacy and Pharmaceutical Technology Department, University of Navarra, Pamplona, Spain; Instituto de Investigación Sanitaria de Navarra (IDISNA), Pamplona, Spain.
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Korczyn AD, Hassin-Baer S. Can the disease course in Parkinson's disease be slowed? BMC Med 2015; 13:295. [PMID: 26653056 PMCID: PMC4675014 DOI: 10.1186/s12916-015-0534-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/10/2015] [Accepted: 11/13/2015] [Indexed: 11/17/2022] Open
Abstract
BACKGROUND The diagnosis of Parkinson's disease (PD), which is needed for useful symptomatic therapy, is based on clinical criteria. However, it became quite clear in recent years that the same features can occur through different etiopathogenic mechanisms. Even a pathological diagnosis of PD, based on the demonstration of α-synuclein deposits in a typical distribution, can result from different causes and, vice versa, nigral cell loss can occur without α-synuclein deposition. DISCUSSION Thus far, attempts to influence the progression of PD have failed. However, since the clinical manifestations of PD can be the result of diverse mechanisms, a single intervention may not be able to slow the course of the disease in all patients. Indeed, targeting the underlying pathogenic processes, which differ among cases, may be more effective. PD may develop as a consequence of mitochondrial damage, which itself may result from a variety of genetic or environmental factors. Correction of the ensuing oxidative stress may theoretically be useful in these PD patients, but will not affect the progression of the disease among other PD patients in whom an identical clinical syndrome derives from defects in other pathways such as the ubiquitin-proteasome system and lysosomal dysfunction, among others. Precision medicine can now be used to identify the underlying pathogenic mechanisms in individual patients, paving the way to the development of real disease modification through a pathway-oriented approach, aimed at the underlying biologic processes of disease occurrence and evolution.
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Affiliation(s)
- Amos D Korczyn
- Department of Neurology, Tel Aviv University Medical School, Ramat Aviv, Tel Aviv, Israel.
| | - Sharon Hassin-Baer
- The Movement Disorders Institute, Sagol Neuroscience Center and Department of Neurology, Chaim Sheba Medical Center, Tel-Hashomer, 52621, Ramat-Gan, Israel.
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Rodríguez-Nogales C, Garbayo E, Carmona-Abellán MM, Luquin MR, Blanco-Prieto MJ. Brain aging and Parkinson's disease: New therapeutic approaches using drug delivery systems. Maturitas 2015; 84:25-31. [PMID: 26653838 DOI: 10.1016/j.maturitas.2015.11.009] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2015] [Revised: 11/16/2015] [Accepted: 11/17/2015] [Indexed: 12/14/2022]
Abstract
The etiology and pathogenesis of Parkinson's disease (PD) is unknown, aging being the strongest risk factor for brain degeneration. Understanding PD pathogenesis and how aging increases the risk of disease would aid the development of therapies able to slow or prevent the progression of this neurodegenerative disorder. In this review we provide an overview of the most promising therapeutic targets and strategies to delay the loss of dopaminergic neurons observed both in PD and aging. Among them, handling alpha-synuclein toxicity, enhancing proteasome and lysosome clearance, ameliorating mitochondrial disruptions and modifying the glial environment are so far the most promising candidates. These new and conventional drugs may present problems related to their labile nature and to the difficulties in reaching the brain. Thus, we highlight the latest types of drug delivery system (DDS)-based strategies for PD treatment, including DDS for local and systemic drug delivery. Finally, the ongoing challenges for the discovery of new targets and the opportunities for DDS-based therapies to improve and efficacious PD therapy will be discussed.
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Affiliation(s)
- C Rodríguez-Nogales
- Pharmacy and Pharmaceutical Technology Department, University of Navarra, Spain
| | - E Garbayo
- Pharmacy and Pharmaceutical Technology Department, University of Navarra, Spain; Instituto de Investigación Sanitaria de Navarra (IDISNA), Pamplona, Spain
| | - M M Carmona-Abellán
- Laboratory of Regenerative Therapy, Department of Neurology and Neuroscience Division, Centre for Applied Medical Research (CIMA), University of Navarra, Spain
| | - M R Luquin
- Instituto de Investigación Sanitaria de Navarra (IDISNA), Pamplona, Spain; Laboratory of Regenerative Therapy, Department of Neurology and Neuroscience Division, Centre for Applied Medical Research (CIMA), University of Navarra, Spain
| | - M J Blanco-Prieto
- Pharmacy and Pharmaceutical Technology Department, University of Navarra, Spain; Instituto de Investigación Sanitaria de Navarra (IDISNA), Pamplona, Spain.
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Franchin C, Cesaro L, Pinna LA, Arrigoni G, Salvi M. Identification of the PLK2-dependent phosphopeptidome by quantitative proteomics [corrected]. PLoS One 2014; 9:e111018. [PMID: 25338102 PMCID: PMC4206460 DOI: 10.1371/journal.pone.0111018] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2014] [Accepted: 08/26/2014] [Indexed: 11/30/2022] Open
Abstract
Polo-like kinase 2 (PLK2) has been recently recognized as the major enzyme responsible for phosphorylation of α-synuclein at S129 in vitro and in vivo, suggesting that this kinase may play a key role in the pathogenesis of Parkinson's disease and other synucleinopathies. Moreover PLK2 seems to be implicated in cell division, oncogenesis, and synaptic regulation of the brain. However little is known about the phosphoproteome generated by PLK2 and, consequently the overall impact of PLK2 on cellular signaling. To fill this gap we exploited an approach based on in vitro kinase assay and quantitative phosphoproteomics. A proteome-derived peptide library obtained by digestion of undifferentiated human neuroblastoma cell line was exhaustively dephosphorylated by lambda phosphatase followed by incubation with or without PLK2 recombinant kinase. Stable isotope labeling based quantitative phosphoproteomics was applied to identify the phosphosites generated by PLK2. A total of 98 unique PLK2-dependent phosphosites from 89 proteins were identified by LC-MS/MS. Analysis of the primary structure of the identified phosphosites allowed the detailed definition of the kinase specificity and the compilation of a list of potential PLK2 targets among those retrieved in PhosphositePlus, a curated database of in cell/vivo phosphorylation sites.
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Affiliation(s)
- Cinzia Franchin
- Department of Biomedical Sciences, University of Padova, Padova, Italy
- Proteomics Center of Padova University, Padova, Italy
| | - Luca Cesaro
- Department of Biomedical Sciences, University of Padova, Padova, Italy
| | - Lorenzo A. Pinna
- Department of Biomedical Sciences, University of Padova, Padova, Italy
- CNR Institute of Neurosciences, Padova, Italy
| | - Giorgio Arrigoni
- Department of Biomedical Sciences, University of Padova, Padova, Italy
- Proteomics Center of Padova University, Padova, Italy
- * E-mail: (GA); (MS)
| | - Mauro Salvi
- Department of Biomedical Sciences, University of Padova, Padova, Italy
- * E-mail: (GA); (MS)
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Li J, Ma W, Wang PY, Hurley PJ, Bunz F, Hwang PM. Polo-like kinase 2 activates an antioxidant pathway to promote the survival of cells with mitochondrial dysfunction. Free Radic Biol Med 2014; 73:270-7. [PMID: 24887096 PMCID: PMC4115326 DOI: 10.1016/j.freeradbiomed.2014.05.022] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/07/2014] [Revised: 05/20/2014] [Accepted: 05/23/2014] [Indexed: 01/06/2023]
Abstract
We previously reported that Polo-like kinase 2 (PLK2) is highly expressed in cells with defective mitochondrial respiration and is essential for their survival. Although PLK2 has been widely studied as a cell cycle regulator, we have uncovered an antioxidant function for this kinase that activates the GSK3-NRF2 signaling pathway. Here, we report that the expression of PLK2 is responsive to oxidative stress and that PLK2 mediates antioxidant signaling by phosphorylating GSK3, thereby promoting the nuclear translocation of NRF2. We further show that the antioxidant activity of PLK2 is essential for preventing p53-dependent necrotic cell death. Thus, the regulation of redox homeostasis by PLK2 promotes the survival of cells with dysfunctional mitochondria, which may have therapeutic implications for cancer and neurodegenerative diseases.
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Affiliation(s)
- Jie Li
- Center for Molecular Medicine, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Wenzhe Ma
- Center for Molecular Medicine, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD 20892, USA; State Key Laboratory for Quality Research in Chinese Medicine, Macau University of Science and Technology, Macau, China
| | - Ping-yuan Wang
- Center for Molecular Medicine, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Paula J Hurley
- Department of Urology, The Johns Hopkins School of Medicine, Baltimore, MD 21287, USA
| | - Fred Bunz
- Radiation Oncology and Molecular Radiation Sciences, The Johns Hopkins School of Medicine, Baltimore, MD 21287, USA
| | - Paul M Hwang
- Center for Molecular Medicine, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD 20892, USA.
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