1
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Ortega Quesada BA, Cuccia J, Coates R, Nassar B, Littlefield E, Martin EC, Melvin AT. A modular microfluidic platform to study how fluid shear stress alters estrogen receptor phenotype in ER + breast cancer cells. MICROSYSTEMS & NANOENGINEERING 2024; 10:25. [PMID: 38370397 PMCID: PMC10873338 DOI: 10.1038/s41378-024-00653-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Revised: 11/17/2023] [Accepted: 12/18/2023] [Indexed: 02/20/2024]
Abstract
Metastatic breast cancer leads to poor prognoses and worse outcomes in patients due to its invasive behavior and poor response to therapy. It is still unclear what biophysical and biochemical factors drive this more aggressive phenotype in metastatic cancer; however recent studies have suggested that exposure to fluid shear stress in the vasculature could cause this. In this study a modular microfluidic platform capable of mimicking the magnitude of fluid shear stress (FSS) found in human vasculature was designed and fabricated. This device provides a platform to evaluate the effects of FSS on MCF-7 cell line, an estrogen receptor positive (ER+) breast cancer cell line, during circulation in the vessels. Elucidation of the effects of FSS on MCF-7 cells was carried out utilizing two approaches: single cell analysis and bulk analysis. For single cell analysis, cells were trapped in a microarray after exiting the serpentine channel and followed by immunostaining on the device (on-chip). Bulk analysis was performed after cells were collected in a microtube at the outlet of the microfluidic serpentine channel for western blotting (off-chip). It was found that cells exposed to an FSS magnitude of 10 dyn/cm2 with a residence time of 60 s enhanced expression of the proliferation marker Ki67 in the MCF-7 cell line at a single cell level. To understand possible mechanisms for enhanced Ki67 expression, on-chip and off-chip analyses were performed for pro-growth and survival pathways ERK, AKT, and JAK/STAT. Results demonstrated that after shearing the cells phosphorylation of p-AKT, p-mTOR, and p-STAT3 were observed. However, there was no change in p-ERK1/2. AKT is a mediator of ER rapid signaling, analysis of phosphorylated ERα was carried out and no significant differences between sheared and non-sheared populations were observed. Taken together these results demonstrate that FSS can increase phosphorylation of proteins associated with a more aggressive phenotype in circulating cancer cells. These findings provide additional information that may help inform why cancer cells located at metastatic sites are usually more aggressive than primary breast cancer cells.
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Affiliation(s)
- Braulio Andrés Ortega Quesada
- Cain Department of Chemical Engineering, Louisiana State University, Baton Rouge, LA 70803 USA
- Department of Chemical and Biological Engineering, Clemson University, Clemson, SC 29634 USA
| | - Jonathan Cuccia
- Biological and Agricultural Engineering, Louisiana State University, Baton Rouge, LA 70803 USA
| | - Rachael Coates
- Biological and Agricultural Engineering, Louisiana State University, Baton Rouge, LA 70803 USA
| | - Blake Nassar
- Cain Department of Chemical Engineering, Louisiana State University, Baton Rouge, LA 70803 USA
| | - Ethan Littlefield
- Biological and Agricultural Engineering, Louisiana State University, Baton Rouge, LA 70803 USA
| | - Elizabeth C. Martin
- Department Medicine, Section Hematology and Medical Oncology, Tulane University, New Orleans, LA 70118 USA
| | - Adam T. Melvin
- Cain Department of Chemical Engineering, Louisiana State University, Baton Rouge, LA 70803 USA
- Department of Chemical and Biological Engineering, Clemson University, Clemson, SC 29634 USA
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2
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Fang H, Shi X, Wan J, Zhong X. Role of sestrins in metabolic and aging-related diseases. Biogerontology 2024; 25:9-22. [PMID: 37516672 DOI: 10.1007/s10522-023-10053-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2023] [Accepted: 07/14/2023] [Indexed: 07/31/2023]
Abstract
Sestrins are a type of highly conserved stress-inducing protein that has antioxidant and mTORC1 inhibitory functions. Metabolic dysfunction and aging are the main risk factors for development of human diseases, such as diabetes, neurodegenerative diseases, and cancer. Sestrins have important roles in regulating glucose and lipid metabolism, anti-tumor functions, and aging by inhibiting the reactive oxygen species and mechanistic target of rapamycin complex 1 pathways. In this review, the structure and biological functions of sestrins are summarized, and how sestrins are activated and contribute to regulation of the downstream signal pathways of metabolic and aging-related diseases are discussed in detail with the goal of providing new ideas and therapeutic targets for the treatment of related diseases.
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Affiliation(s)
- Huan Fang
- Department of Gastroenterology, The Affiliated Hospital of Southwest Medical University, 25 Taiping Road, Luzhou, 646000, China
| | - Xiaomin Shi
- Department of Gastroenterology, The Affiliated Hospital of Southwest Medical University, 25 Taiping Road, Luzhou, 646000, China
| | - Juyi Wan
- Department of Cardiovascular Surgery, The Affiliated Hospital of Southwest Medical University, 25 Taiping Road, Luzhou, 646000, China.
| | - Xiaolin Zhong
- Department of Gastroenterology, The Affiliated Hospital of Southwest Medical University, 25 Taiping Road, Luzhou, 646000, China.
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3
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Zeng C, Han S, Pan Y, Huang Z, Zhang B, Zhang B. Revisiting the chaperonin T-complex protein-1 ring complex in human health and disease: A proteostasis modulator and beyond. Clin Transl Med 2024; 14:e1592. [PMID: 38363102 PMCID: PMC10870801 DOI: 10.1002/ctm2.1592] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2023] [Revised: 01/28/2024] [Accepted: 02/05/2024] [Indexed: 02/17/2024] Open
Abstract
BACKGROUND Disrupted protein homeostasis (proteostasis) has been demonstrated to facilitate the progression of various diseases. The cytosolic T-complex protein-1 ring complex (TRiC/CCT) was discovered to be a critical player in orchestrating proteostasis by folding eukaryotic proteins, guiding intracellular localisation and suppressing protein aggregation. Intensive investigations of TRiC/CCT in different fields have improved the understanding of its role and molecular mechanism in multiple physiological and pathological processes. MAIN BODY In this review, we embark on a journey through the dynamic protein folding cycle of TRiC/CCT, unraveling the intricate mechanisms of its substrate selection, recognition, and intriguing folding and assembly processes. In addition to discussing the critical role of TRiC/CCT in maintaining proteostasis, we detail its involvement in cell cycle regulation, apoptosis, autophagy, metabolic control, adaptive immunity and signal transduction processes. Furthermore, we meticulously catalogue a compendium of TRiC-associated diseases, such as neuropathies, cardiovascular diseases and various malignancies. Specifically, we report the roles and molecular mechanisms of TRiC/CCT in regulating cancer formation and progression. Finally, we discuss unresolved issues in TRiC/CCT research, highlighting the efforts required for translation to clinical applications, such as diagnosis and treatment. CONCLUSION This review aims to provide a comprehensive view of TRiC/CCT for researchers to inspire further investigations and explorations of potential translational possibilities.
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Affiliation(s)
- Chenglong Zeng
- Hepatic Surgery Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and TechnologyWuhanChina
- Clinical Medical Research Center of Hepatic Surgery at Hubei ProvinceWuhanChina
- Hubei Key Laboratory of Hepato‐Pancreatic‐Biliary Diseases, Tongji Hospital, Tongji Medical College, Huazhong University of Science and TechnologyWuhanChina
| | - Shenqi Han
- Hepatic Surgery Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and TechnologyWuhanChina
- Clinical Medical Research Center of Hepatic Surgery at Hubei ProvinceWuhanChina
- Hubei Key Laboratory of Hepato‐Pancreatic‐Biliary Diseases, Tongji Hospital, Tongji Medical College, Huazhong University of Science and TechnologyWuhanChina
| | - Yonglong Pan
- Hepatic Surgery Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and TechnologyWuhanChina
- Clinical Medical Research Center of Hepatic Surgery at Hubei ProvinceWuhanChina
- Hubei Key Laboratory of Hepato‐Pancreatic‐Biliary Diseases, Tongji Hospital, Tongji Medical College, Huazhong University of Science and TechnologyWuhanChina
| | - Zhao Huang
- Hepatic Surgery Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and TechnologyWuhanChina
- Clinical Medical Research Center of Hepatic Surgery at Hubei ProvinceWuhanChina
- Hubei Key Laboratory of Hepato‐Pancreatic‐Biliary Diseases, Tongji Hospital, Tongji Medical College, Huazhong University of Science and TechnologyWuhanChina
| | - Binhao Zhang
- Hepatic Surgery Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and TechnologyWuhanChina
- Clinical Medical Research Center of Hepatic Surgery at Hubei ProvinceWuhanChina
- Hubei Key Laboratory of Hepato‐Pancreatic‐Biliary Diseases, Tongji Hospital, Tongji Medical College, Huazhong University of Science and TechnologyWuhanChina
| | - Bixiang Zhang
- Hepatic Surgery Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and TechnologyWuhanChina
- Clinical Medical Research Center of Hepatic Surgery at Hubei ProvinceWuhanChina
- Hubei Key Laboratory of Hepato‐Pancreatic‐Biliary Diseases, Tongji Hospital, Tongji Medical College, Huazhong University of Science and TechnologyWuhanChina
- Key Laboratory of Organ Transplantation, Ministry of EducationWuhanChina
- Key Laboratory of Organ Transplantation, National Health CommissionWuhanChina
- Key Laboratory of Organ Transplantation, Chinese Academy of Medical SciencesWuhanChina
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4
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Quesada BAO, Cuccia J, Coates R, Nassar B, Littlefield E, Martin EC, Melvin AT. A modular microfluidic platform to study how fluid shear stress alters estrogen receptor phenotype in ER + breast cancer cells. RESEARCH SQUARE 2023:rs.3.rs-3399118. [PMID: 37886527 PMCID: PMC10602101 DOI: 10.21203/rs.3.rs-3399118/v1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2023]
Abstract
Metastatic breast cancer leads to poor prognoses and worse outcomes in patients due to its invasive behavior and poor response to therapy. It is still unclear what biophysical and biochemical factors drive this more aggressive phenotype in metastatic cancer; however recent studies have suggested that exposure to fluid shear stress in the vasculature could cause this. In this study a modular microfluidic platform capable of mimicking the magnitude of fluid shear stress (FSS) found in human vasculature was designed and fabricated. This device provides a platform to evaluate the effects of FSS on MCF-7 cell line, a receptor positive (ER+) breast cancer cell line, during circulation in the vessels. Elucidation of the effects of FSS on MCF-7 cells was carried out utilizing two approaches: single cell analysis and bulk analysis. For single cell analysis, cells were trapped in a microarray after exiting the serpentine channel and followed by immunostaining on the device (on-chip). Bulk analysis was performed after cells were collected in a microtube at the outlet of the microfluidic serpentine channel for western blotting (off-chip). It was found that cells exposed to an FSS magnitude of 10 dyn/cm2 with a residence time of 60 seconds enhanced expression of the proliferation marker Ki67 in the MCF-7 cell line at a single cell level. To understand possible mechanisms for enhanced Ki67 expression, on-chip and off-chip analyses were performed for pro-growth and survival pathways ERK, AKT, and JAK/STAT. Results demonstrated that after shearing the cells phosphorylation of p-AKT, p-mTOR, and p-STAT3 were observed. However, there was no change in p-ERK1/2. AKT is a mediator of ER rapid signaling, analysis of phosphorylated ERα was carried out and no significant differences between sheared and non-sheared populations were observed. Taken together these results demonstrate that FSS can increase phosphorylation of proteins associated with a more aggressive phenotype in circulating cancer cells. These findings provide additional information that may help inform why cancer cells located at metastatic sites are usually more aggressive than primary breast cancer cells.
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Affiliation(s)
- Braulio Andrés Ortega Quesada
- Cain Department of Chemical Engineering, Louisiana State University, Baton Rouge, LA, 70803
- Department of Chemical and Biological Engineering, Clemson University, Clemson, SC, 29634
| | - Jonathan Cuccia
- Biological and Agricultural Engineering, Louisiana State University, Baton Rouge, LA, 70803
| | - Rachael Coates
- Biological and Agricultural Engineering, Louisiana State University, Baton Rouge, LA, 70803
| | - Blake Nassar
- Cain Department of Chemical Engineering, Louisiana State University, Baton Rouge, LA, 70803
| | - Ethan Littlefield
- Biological and Agricultural Engineering, Louisiana State University, Baton Rouge, LA, 70803
| | - Elizabeth C. Martin
- Department Medicine, Section Hematology and Medical Oncology, Tulane University, New Orleans, LA, 70118
| | - Adam T. Melvin
- Cain Department of Chemical Engineering, Louisiana State University, Baton Rouge, LA, 70803
- Department of Chemical and Biological Engineering, Clemson University, Clemson, SC, 29634
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5
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Taya T, Teruyama F, Gojo S. Host-directed therapy for bacterial infections -Modulation of the phagolysosome pathway. Front Immunol 2023; 14:1227467. [PMID: 37841276 PMCID: PMC10570837 DOI: 10.3389/fimmu.2023.1227467] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Accepted: 09/11/2023] [Indexed: 10/17/2023] Open
Abstract
Bacterial infections still impose a significant burden on humanity, even though antimicrobial agents have long since been developed. In addition to individual severe infections, the f fatality rate of sepsis remains high, and the threat of antimicrobial-resistant bacteria grows with time, putting us at inferiority. Although tremendous resources have been devoted to the development of antimicrobial agents, we have yet to recover from the lost ground we have been driven into. Looking back at the evolution of treatment for cancer, which, like infectious diseases, has the similarity that host immunity eliminates the lesion, the development of drugs to eliminate the tumor itself has shifted from a single-minded focus on drug development to the establishment of a treatment strategy in which the de-suppression of host immunity is another pillar of treatment. In infectious diseases, on the other hand, the development of therapies that strengthen and support the immune system has only just begun. Among innate immunity, the first line of defense that bacteria encounter after invading the host, the molecular mechanisms of the phagolysosome pathway, which begins with phagocytosis to fusion with lysosome, have been elucidated in detail. Bacteria have a large number of strategies to escape and survive the pathway. Although the full picture is still unfathomable, the molecular mechanisms have been elucidated for some of them, providing sufficient clues for intervention. In this article, we review the host defense mechanisms and bacterial evasion mechanisms and discuss the possibility of host-directed therapy for bacterial infection by intervening in the phagolysosome pathway.
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Affiliation(s)
- Toshihiko Taya
- Department of Cardiovascular Medicine, Graduate School of Medicine, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Fumiya Teruyama
- Pharmacology Research Department, Tokyo New Drug Research Laboratories, Kowa Company, Ltd., Tokyo, Japan
- Department of Regenerative Medicine, Graduate School of Medicine, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Satoshi Gojo
- Department of Regenerative Medicine, Graduate School of Medicine, Kyoto Prefectural University of Medicine, Kyoto, Japan
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6
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Rojas‐Gómez A, Dosil SG, Chichón FJ, Fernández‐Gallego N, Ferrarini A, Calvo E, Calzada‐Fraile D, Requena S, Otón J, Serrano A, Tarifa R, Arroyo M, Sorrentino A, Pereiro E, Vázquez J, Valpuesta JM, Sánchez‐Madrid F, Martín‐Cófreces NB. Chaperonin CCT controls extracellular vesicle production and cell metabolism through kinesin dynamics. J Extracell Vesicles 2023; 12:e12333. [PMID: 37328936 PMCID: PMC10276179 DOI: 10.1002/jev2.12333] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Accepted: 05/02/2023] [Indexed: 06/18/2023] Open
Abstract
Cell proteostasis includes gene transcription, protein translation, folding of de novo proteins, post-translational modifications, secretion, degradation and recycling. By profiling the proteome of extracellular vesicles (EVs) from T cells, we have found the chaperonin complex CCT, involved in the correct folding of particular proteins. By limiting CCT cell-content by siRNA, cells undergo altered lipid composition and metabolic rewiring towards a lipid-dependent metabolism, with increased activity of peroxisomes and mitochondria. This is due to dysregulation of the dynamics of interorganelle contacts between lipid droplets, mitochondria, peroxisomes and the endolysosomal system. This process accelerates the biogenesis of multivesicular bodies leading to higher EV production through the dynamic regulation of microtubule-based kinesin motors. These findings connect proteostasis with lipid metabolism through an unexpected role of CCT.
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Affiliation(s)
- Amelia Rojas‐Gómez
- Immunology ServiceHospital Universitario de la Princesa, UAM, IIS‐IPMadridSpain
- Area of Vascular Pathophysiology, Laboratory of Intercellular CommunicationFundación Centro Nacional de Investigaciones Cardiovasculares‐Carlos IIIMadridSpain
| | - Sara G. Dosil
- Immunology ServiceHospital Universitario de la Princesa, UAM, IIS‐IPMadridSpain
- Area of Vascular Pathophysiology, Laboratory of Intercellular CommunicationFundación Centro Nacional de Investigaciones Cardiovasculares‐Carlos IIIMadridSpain
| | - Francisco J. Chichón
- Cryoelectron Microscopy UnitCentro Nacional de Biotecnología (CNB‐CSIC)MadridSpain
- Department of Macromolecular StructureCentro Nacional de Biotecnología (CNB‐CSIC)MadridSpain
| | - Nieves Fernández‐Gallego
- Immunology ServiceHospital Universitario de la Princesa, UAM, IIS‐IPMadridSpain
- Area of Vascular Pathophysiology, Laboratory of Intercellular CommunicationFundación Centro Nacional de Investigaciones Cardiovasculares‐Carlos IIIMadridSpain
| | - Alessia Ferrarini
- Laboratory of Cardiovascular ProteomicsFundación Centro Nacional de Investigaciones Cardiovasculares‐Carlos IIIMadridSpain
| | - Enrique Calvo
- Laboratory of Cardiovascular ProteomicsFundación Centro Nacional de Investigaciones Cardiovasculares‐Carlos IIIMadridSpain
| | - Diego Calzada‐Fraile
- Area of Vascular Pathophysiology, Laboratory of Intercellular CommunicationFundación Centro Nacional de Investigaciones Cardiovasculares‐Carlos IIIMadridSpain
| | - Silvia Requena
- Immunology ServiceHospital Universitario de la Princesa, UAM, IIS‐IPMadridSpain
- CIBER de Enfermedades Cardiovasculares (CIBERCV)MadridSpain
| | - Joaquin Otón
- Structural Studies DivisionMRC Laboratory of Molecular BiologyCambridgeUK
- ALBA Synchrotron Light SourceBarcelonaSpain
| | - Alvaro Serrano
- Area of Vascular Pathophysiology, Laboratory of Intercellular CommunicationFundación Centro Nacional de Investigaciones Cardiovasculares‐Carlos IIIMadridSpain
| | - Rocio Tarifa
- Laboratory of Cardiovascular ProteomicsFundación Centro Nacional de Investigaciones Cardiovasculares‐Carlos IIIMadridSpain
| | - Montserrat Arroyo
- Immunology ServiceHospital Universitario de la Princesa, UAM, IIS‐IPMadridSpain
| | | | | | - Jesus Vázquez
- Laboratory of Cardiovascular ProteomicsFundación Centro Nacional de Investigaciones Cardiovasculares‐Carlos IIIMadridSpain
- CIBER de Enfermedades Cardiovasculares (CIBERCV)MadridSpain
| | - José M. Valpuesta
- Department of Macromolecular StructureCentro Nacional de Biotecnología (CNB‐CSIC)MadridSpain
| | - Francisco Sánchez‐Madrid
- Immunology ServiceHospital Universitario de la Princesa, UAM, IIS‐IPMadridSpain
- Area of Vascular Pathophysiology, Laboratory of Intercellular CommunicationFundación Centro Nacional de Investigaciones Cardiovasculares‐Carlos IIIMadridSpain
- CIBER de Enfermedades Cardiovasculares (CIBERCV)MadridSpain
| | - Noa B. Martín‐Cófreces
- Immunology ServiceHospital Universitario de la Princesa, UAM, IIS‐IPMadridSpain
- Area of Vascular Pathophysiology, Laboratory of Intercellular CommunicationFundación Centro Nacional de Investigaciones Cardiovasculares‐Carlos IIIMadridSpain
- CIBER de Enfermedades Cardiovasculares (CIBERCV)MadridSpain
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7
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Pinho-Correia LM, Prokop A. Maintaining essential microtubule bundles in meter-long axons: a role for local tubulin biogenesis? Brain Res Bull 2023; 193:131-145. [PMID: 36535305 DOI: 10.1016/j.brainresbull.2022.12.005] [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: 10/16/2022] [Revised: 12/12/2022] [Accepted: 12/14/2022] [Indexed: 12/23/2022]
Abstract
Axons are the narrow, up-to-meter long cellular processes of neurons that form the biological cables wiring our nervous system. Most axons must survive for an organism's lifetime, i.e. up to a century in humans. Axonal maintenance depends on loose bundles of microtubules that run without interruption all along axons. The continued turn-over and the extension of microtubule bundles during developmental, regenerative or plastic growth requires the availability of α/β-tubulin heterodimers up to a meter away from the cell body. The underlying regulation in axons is poorly understood and hardly features in past and contemporary research. Here we discuss potential mechanisms, particularly focussing on the possibility of local tubulin biogenesis in axons. Current knowledge might suggest that local translation of tubulin takes place in axons, but far less is known about the post-translational machinery of tubulin biogenesis involving three chaperone complexes: prefoldin, CCT and TBC. We discuss functional understanding of these chaperones from a range of model organisms including yeast, plants, flies and mice, and explain what is known from human diseases. Microtubules across species depend on these chaperones, and they are clearly required in the nervous system. However, most chaperones display a high degree of functional pleiotropy, partly through independent functions of individual subunits outside their complexes, thus posing a challenge to experimental studies. Notably, we found hardly any studies that investigate their presence and function particularly in axons, thus highlighting an important gap in our understanding of axon biology and pathology.
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Affiliation(s)
- Liliana Maria Pinho-Correia
- The University of Manchester, Manchester Academic Health Science Centre, Faculty of Biology, Medicine and Health, School of Biology, Manchester, UK
| | - Andreas Prokop
- The University of Manchester, Manchester Academic Health Science Centre, Faculty of Biology, Medicine and Health, School of Biology, Manchester, UK.
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8
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Wilkinson MD, Ferreira JL, Beeby M, Baum J, Willison KR. The malaria parasite chaperonin containing TCP-1 (CCT) complex: Data integration with other CCT proteomes. Front Mol Biosci 2022; 9:1057232. [PMID: 36567946 PMCID: PMC9772883 DOI: 10.3389/fmolb.2022.1057232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Accepted: 11/18/2022] [Indexed: 12/13/2022] Open
Abstract
The multi-subunit chaperonin containing TCP-1 (CCT) is an essential molecular chaperone that functions in the folding of key cellular proteins. This paper reviews the interactome of the eukaryotic chaperonin CCT and its primary clients, the ubiquitous cytoskeletal proteins, actin and tubulin. CCT interacts with other nascent proteins, especially the WD40 propeller proteins, and also assists in the assembly of several protein complexes. A new proteomic dataset is presented for CCT purified from the human malarial parasite, P. falciparum (PfCCT). The CCT8 subunit gene was C-terminally FLAG-tagged using Selection Linked Integration (SLI) and CCT complexes were extracted from infected human erythrocyte cultures synchronized for maximum expression levels of CCT at the trophozoite stage of the parasite's asexual life cycle. We analyze the new PfCCT proteome and incorporate it into our existing model of the CCT system, supported by accumulated data from biochemical and cell biological experiments in many eukaryotic species. Together with measurements of CCT mRNA, CCT protein subunit copy number and the post-translational and chemical modifications of the CCT subunits themselves, a cumulative picture is emerging of an essential molecular chaperone system sitting at the heart of eukaryotic cell growth control and cell cycle regulation.
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Affiliation(s)
- Mark D. Wilkinson
- Department of Life Sciences, Imperial College London, London, United Kingdom
| | - Josie L. Ferreira
- Department of Life Sciences, Imperial College London, London, United Kingdom
| | - Morgan Beeby
- Department of Life Sciences, Imperial College London, London, United Kingdom
| | - Jake Baum
- Department of Life Sciences, Imperial College London, London, United Kingdom,School of Biomedical Sciences, University of New South Wales, Kensington, NSW, Australia
| | - Keith R. Willison
- Department of Chemistry, Molecular Sciences Research Hub, Imperial College London, London, United Kingdom,*Correspondence: Keith R. Willison,
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9
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Direct control of lysosomal catabolic activity by mTORC1 through regulation of V-ATPase assembly. Nat Commun 2022; 13:4848. [PMID: 35977928 PMCID: PMC9385660 DOI: 10.1038/s41467-022-32515-6] [Citation(s) in RCA: 35] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2021] [Accepted: 08/03/2022] [Indexed: 12/15/2022] Open
Abstract
Mammalian cells can acquire exogenous amino acids through endocytosis and lysosomal catabolism of extracellular proteins. In amino acid-replete environments, nutritional utilization of extracellular proteins is suppressed by the amino acid sensor mechanistic target of rapamycin complex 1 (mTORC1) through an unknown process. Here, we show that mTORC1 blocks lysosomal degradation of extracellular proteins by suppressing V-ATPase-mediated acidification of lysosomes. When mTORC1 is active, peripheral V-ATPase V1 domains reside in the cytosol where they are stabilized by association with the chaperonin TRiC. Consequently, most lysosomes display low catabolic activity. When mTORC1 activity declines, V-ATPase V1 domains move to membrane-integral V-ATPase Vo domains at lysosomes to assemble active proton pumps. The resulting drop in luminal pH increases protease activity and degradation of protein contents throughout the lysosomal population. These results uncover a principle by which cells rapidly respond to changes in their nutrient environment by mobilizing the latent catabolic capacity of lysosomes. mTORC1 blocks lysosomal nutrient generation. Here, the authors show that mTORC1 inactivation triggers V-ATPase assembly, which rapidly initiates lysosomal acidification and degradation of protein contents throughout the lysosomal population.
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10
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Fumagalli S, Pende M. S6 kinase 1 at the central node of cell size and ageing. Front Cell Dev Biol 2022; 10:949196. [PMID: 36036012 PMCID: PMC9417411 DOI: 10.3389/fcell.2022.949196] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Accepted: 07/07/2022] [Indexed: 11/17/2022] Open
Abstract
Genetic evidence in living organisms from yeast to plants and animals, including humans, unquestionably identifies the Target Of Rapamycin kinase (TOR or mTOR for mammalian/mechanistic) signal transduction pathway as a master regulator of growth through the control of cell size and cell number. Among the mTOR targets, the activation of p70 S6 kinase 1 (S6K1) is exquisitely sensitive to nutrient availability and rapamycin inhibition. Of note, in vivo analysis of mutant flies and mice reveals that S6K1 predominantly regulates cell size versus cell proliferation. Here we review the putative mechanisms of S6K1 action on cell size by considering the main functional categories of S6K1 targets: substrates involved in nucleic acid and protein synthesis, fat mass accumulation, retrograde control of insulin action, senescence program and cytoskeleton organization. We discuss how S6K1 may be involved in the observed interconnection between cell size, regenerative and ageing responses.
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Affiliation(s)
| | - Mario Pende
- *Correspondence: Stefano Fumagalli, ; Mario Pende,
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11
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Beyond controlling cell size: functional analyses of S6K in tumorigenesis. Cell Death Dis 2022; 13:646. [PMID: 35879299 PMCID: PMC9314331 DOI: 10.1038/s41419-022-05081-4] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Revised: 07/05/2022] [Accepted: 07/07/2022] [Indexed: 01/21/2023]
Abstract
As a substrate and major effector of the mammalian target of rapamycin complex 1 (mTORC1), the biological functions of ribosomal protein S6 kinase (S6K) have been canonically assigned for cell size control by facilitating mRNA transcription, splicing, and protein synthesis. However, accumulating evidence implies that diverse stimuli and upstream regulators modulate S6K kinase activity, leading to the activation of a plethora of downstream substrates for distinct pathobiological functions. Beyond controlling cell size, S6K simultaneously plays crucial roles in directing cell apoptosis, metabolism, and feedback regulation of its upstream signals. Thus, we comprehensively summarize the emerging upstream regulators, downstream substrates, mouse models, clinical relevance, and candidate inhibitors for S6K and shed light on S6K as a potential therapeutic target for cancers.
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12
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Jacko D, Schaaf K, Masur L, Windoffer H, Aussieker T, Schiffer T, Zacher J, Bloch W, Gehlert S. Repeated and Interrupted Resistance Exercise Induces the Desensitization and Re-Sensitization of mTOR-Related Signaling in Human Skeletal Muscle Fibers. Int J Mol Sci 2022; 23:ijms23105431. [PMID: 35628242 PMCID: PMC9141560 DOI: 10.3390/ijms23105431] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Revised: 05/07/2022] [Accepted: 05/09/2022] [Indexed: 02/06/2023] Open
Abstract
The acute resistance exercise (RE)-induced phosphorylation of mTOR-related signaling proteins in skeletal muscle can be blunted after repeated RE. The time frame in which the phosphorylation (p) of mTORS2448, p70S6kT421/S424, and rpS6S235/236 will be reduced during an RE training period in humans and whether progressive (PR) loading can counteract such a decline has not been described. (1) To enclose the time frame in which pmTORS2448, prpS6S235/236, and pp70S6kT421/S424 are acutely reduced after RE occurs during repeated RE. (2) To test whether PR will prevent that reduction compared to constant loading (CO) and (3) whether 10 days without RE may re-increase blunted signaling. Fourteen healthy males (24 ± 2.8 yrs.; 1.83 ± 0.1 cm; 79.3 ± 8.5 kg) were subjected to RE with either PR (n = 8) or CO (n = 6) loading. Subjects performed RE thrice per week, conducting three sets with 10−12 repetitions on a leg press and leg extension machine. Muscle biopsies were collected at rest (T0), 45 min after the first (T1), seventh (T7), 13th (T13), and 14th (X-T14) RE session. No differences were found between PR and CO for any parameter. Thus, the groups were combined, and the results show the merged values. prpS6S235/236 and pp70s6kT421/S424 were increased at T1, but were already reduced at T7 and up to T13 compared to T1. Ten days without RE re-increased prpS6S235/236 and pp70S6kT421/S424 at X-T14 to a level comparable to that of T1. pmTORS2448 was increased from T1 to X-T14 and did not decline over the training period. Single-fiber immunohistochemistry revealed a reduction in prpS6S235/236 in type I fibers from T1 to T13 and a re-increase at X-T14, which was more augmented in type II fibers at T13 (p < 0.05). The entity of myofibers revealed a high heterogeneity in the level of prpS6S235/236, possibly reflecting individual contraction-induced stress during RE. The type I and II myofiber diameter increased from T0 and T1 to T13 and X-T14 (p < 0.05) prpS6S235/236 and pp70s6kT421/S424 reflect RE-induced states of desensitization and re-sensitization in dependency on frequent loading by RE, but also by its cessation.
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Affiliation(s)
- Daniel Jacko
- Department of Molecular and Cellular Sports Medicine, Institute of Cardiovascular Research and Sports Medicine, German Sport University Cologne, 50933 Cologne, Germany; (D.J.); (K.S.); (L.M.); (H.W.); (T.A.); (W.B.)
- Olympic Base Center NRW/Rhineland, 50933 Cologne, Germany
| | - Kirill Schaaf
- Department of Molecular and Cellular Sports Medicine, Institute of Cardiovascular Research and Sports Medicine, German Sport University Cologne, 50933 Cologne, Germany; (D.J.); (K.S.); (L.M.); (H.W.); (T.A.); (W.B.)
| | - Lukas Masur
- Department of Molecular and Cellular Sports Medicine, Institute of Cardiovascular Research and Sports Medicine, German Sport University Cologne, 50933 Cologne, Germany; (D.J.); (K.S.); (L.M.); (H.W.); (T.A.); (W.B.)
| | - Hannes Windoffer
- Department of Molecular and Cellular Sports Medicine, Institute of Cardiovascular Research and Sports Medicine, German Sport University Cologne, 50933 Cologne, Germany; (D.J.); (K.S.); (L.M.); (H.W.); (T.A.); (W.B.)
| | - Thorben Aussieker
- Department of Molecular and Cellular Sports Medicine, Institute of Cardiovascular Research and Sports Medicine, German Sport University Cologne, 50933 Cologne, Germany; (D.J.); (K.S.); (L.M.); (H.W.); (T.A.); (W.B.)
| | - Thorsten Schiffer
- Outpatient Clinic for Sports Traumatology and Public Health Consultation, German Sport University Cologne, 50933 Cologne, Germany;
| | - Jonas Zacher
- Department ofPreventative and Rehabilitative Sports and Performance Medicine, Institute of Cardiology and Sports Medicine, German Sports University Cologne, 50933 Cologne, Germany;
| | - Wilhelm Bloch
- Department of Molecular and Cellular Sports Medicine, Institute of Cardiovascular Research and Sports Medicine, German Sport University Cologne, 50933 Cologne, Germany; (D.J.); (K.S.); (L.M.); (H.W.); (T.A.); (W.B.)
- German Research Centre of Elite Sport (Momentum), German Sport University Cologne, 50933 Cologne, Germany
| | - Sebastian Gehlert
- Department of Molecular and Cellular Sports Medicine, Institute of Cardiovascular Research and Sports Medicine, German Sport University Cologne, 50933 Cologne, Germany; (D.J.); (K.S.); (L.M.); (H.W.); (T.A.); (W.B.)
- Institute of Sport Science, Biosciences of Sports, University of Hildesheim, 31141 Hildesheim, Germany
- Correspondence: ; Tel.: +49-(0)-5121-883-580; Fax: +49-(0)-5121-883-591
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Ghozlan H, Cox A, Nierenberg D, King S, Khaled AR. The TRiCky Business of Protein Folding in Health and Disease. Front Cell Dev Biol 2022; 10:906530. [PMID: 35602608 PMCID: PMC9117761 DOI: 10.3389/fcell.2022.906530] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Accepted: 04/20/2022] [Indexed: 01/03/2023] Open
Abstract
Maintenance of the cellular proteome or proteostasis is an essential process that when deregulated leads to diseases like neurological disorders and cancer. Central to proteostasis are the molecular chaperones that fold proteins into functional 3-dimensional (3D) shapes and prevent protein aggregation. Chaperonins, a family of chaperones found in all lineages of organisms, are efficient machines that fold proteins within central cavities. The eukaryotic Chaperonin Containing TCP1 (CCT), also known as Tailless complex polypeptide 1 (TCP-1) Ring Complex (TRiC), is a multi-subunit molecular complex that folds the obligate substrates, actin, and tubulin. But more than folding cytoskeletal proteins, CCT differs from most chaperones in its ability to fold proteins larger than its central folding chamber and in a sequential manner that enables it to tackle proteins with complex topologies or very large proteins and complexes. Unique features of CCT include an asymmetry of charges and ATP affinities across the eight subunits that form the hetero-oligomeric complex. Variable substrate binding capacities endow CCT with a plasticity that developed as the chaperonin evolved with eukaryotes and acquired functional capacity in the densely packed intracellular environment. Given the decades of discovery on the structure and function of CCT, much remains unknown such as the scope of its interactome. New findings on the role of CCT in disease, and potential for diagnostic and therapeutic uses, heighten the need to better understand the function of this essential molecular chaperone. Clues as to how CCT causes cancer or neurological disorders lie in the early studies of the chaperonin that form a foundational knowledgebase. In this review, we span the decades of CCT discoveries to provide critical context to the continued research on the diverse capacities in health and disease of this essential protein-folding complex.
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Affiliation(s)
- Heba Ghozlan
- Division of Cancer Research, Burnett School of Biomedical Sciences, College of Medicine, University of Central Florida, Orlando, FL, United States
- Department of Physiology and Biochemistry, Jordan University of Science and Technology, Irbid, Jordan
| | - Amanda Cox
- Division of Cancer Research, Burnett School of Biomedical Sciences, College of Medicine, University of Central Florida, Orlando, FL, United States
| | - Daniel Nierenberg
- Division of Cancer Research, Burnett School of Biomedical Sciences, College of Medicine, University of Central Florida, Orlando, FL, United States
| | - Stephen King
- Division of Neuroscience, Burnett School of Biomedical Sciences, College of Medicine, University of Central Florida, Orlando, FL, United States
| | - Annette R. Khaled
- Division of Cancer Research, Burnett School of Biomedical Sciences, College of Medicine, University of Central Florida, Orlando, FL, United States
- *Correspondence: Annette R. Khaled,
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14
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Känel P, Noll GA, Schroedter K, Naffin E, Kronenberg J, Busswinkel F, Twyman RM, Klämbt C, Prüfer D. The tobacco phosphatidylethanolamine-binding protein NtFT4 increases the lifespan of Drosophila melanogaster by interacting with the proteostasis network. Aging (Albany NY) 2022; 14:2989-3029. [PMID: 35396341 PMCID: PMC9037272 DOI: 10.18632/aging.204005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Accepted: 03/24/2022] [Indexed: 11/25/2022]
Abstract
Proteostasis reflects the well-balanced synthesis, trafficking and degradation of cellular proteins. This is a fundamental aspect of the dynamic cellular proteome, which integrates multiple signaling pathways, but it becomes increasingly error-prone during aging. Phosphatidylethanolamine-binding proteins (PEBPs) are highly conserved regulators of signaling networks and could therefore affect aging-related processes. To test this hypothesis, we expressed PEPBs in a heterologous context to determine their ectopic activity. We found that heterologous expression of the tobacco (Nicotiana tabacum) PEBP NtFT4 in Drosophila melanogaster significantly increased the lifespan of adult flies and reduced age-related locomotor decline. Similarly, overexpression of the Drosophila ortholog CG7054 increased longevity, whereas its suppression by RNA interference had the opposite effect. In tobacco, NtFT4 acts as a floral regulator by integrating environmental and intrinsic stimuli to promote the transition to reproductive growth. In Drosophila, NtFT4 engaged distinct targets related to proteostasis, such as HSP26. In older flies, it also prolonged Hsp26 gene expression, which promotes longevity by maintaining protein integrity. In NtFT4-transgenic flies, we identified deregulated genes encoding proteases that may contribute to proteome stability at equilibrium. Our results demonstrate that the expression of NtFT4 influences multiple aspects of the proteome maintenance system via both physical interactions and transcriptional regulation, potentially explaining the aging-related phenotypes we observed.
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Affiliation(s)
- Philip Känel
- Fraunhofer Institute for Molecular Biology and Applied Ecology IME, Münster, Germany
| | - Gundula A. Noll
- Institute of Plant Biology and Biotechnology, University of Münster, Münster, Germany
| | - Katrin Schroedter
- Fraunhofer Institute for Molecular Biology and Applied Ecology IME, Münster, Germany
| | - Elke Naffin
- Institute of Neuro- and Behavioral Biology, University of Münster, Münster, Germany
| | - Julia Kronenberg
- Fraunhofer Institute for Molecular Biology and Applied Ecology IME, Münster, Germany
| | - Franziska Busswinkel
- Fraunhofer Institute for Molecular Biology and Applied Ecology IME, Münster, Germany
| | | | - Christian Klämbt
- Institute of Neuro- and Behavioral Biology, University of Münster, Münster, Germany
| | - Dirk Prüfer
- Fraunhofer Institute for Molecular Biology and Applied Ecology IME, Münster, Germany
- Institute of Plant Biology and Biotechnology, University of Münster, Münster, Germany
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15
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Abnormal mTOR Activity in Pediatric Autoimmune Neuropsychiatric and MIA-Associated Autism Spectrum Disorders. Int J Mol Sci 2022; 23:ijms23020967. [PMID: 35055151 PMCID: PMC8781199 DOI: 10.3390/ijms23020967] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2021] [Revised: 01/14/2022] [Accepted: 01/14/2022] [Indexed: 12/12/2022] Open
Abstract
Autism spectrum disorder (ASD) is a neurodevelopmental condition characterized by the early onset of communication and behavioral problems. ASD is highly heritable; however, environmental factors also play a considerable role in this disorder. A significant part of both syndromic and idiopathic autism cases could be attributed to disorders caused by mammalian target of rapamycin (mTOR)-dependent translation deregulation. This narrative review analyzes both bioinformatic and experimental evidence that connects mTOR signaling to the maternal autoantibody-related (MAR) autism spectrum and autoimmune neuropsychiatric disorders simultaneously. In addition, we reconstruct a network presenting the interactions between the mTOR signaling and eight MAR ASD genes coding for ASD-specific maternal autoantibody target proteins. The research discussed in this review demonstrates novel perspectives and validates the need for a subtyping of ASD on the grounds of pathogenic mechanisms. The utter necessity of designing ELISA-based test panels to identify all antibodies related to autism-like behavior is also considered.
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16
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Khegay II. Vasopressin Receptors in Blood Vessels and Proliferation of Endotheliocytes. RUSSIAN JOURNAL OF BIOORGANIC CHEMISTRY 2021. [DOI: 10.1134/s1068162021040129] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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17
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Sancho-Martínez SM, Sánchez-Juanes F, Blanco-Gozalo V, Fontecha-Barriuso M, Prieto-García L, Fuentes-Calvo I, González-Buitrago JM, Morales AI, Martínez-Salgado C, Ramos-Barron MA, Gómez-Alamillo C, Arias M, López-Novoa JM, López-Hernández FJ. Urinary TCP1-eta: A Cortical Damage Marker for the Pathophysiological Diagnosis and Prognosis of Acute Kidney Injury. Toxicol Sci 2021; 174:3-15. [PMID: 31825490 DOI: 10.1093/toxsci/kfz242] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Acute kidney injury (AKI) is a serious syndrome with increasing incidence and health consequences, and high mortality rate among critically ill patients. Acute kidney injury lacks a unified definition, has ambiguous semantic boundaries, and relies on defective diagnosis. This, in part, is due to the absence of biomarkers substratifying AKI patients into pathophysiological categories based on which prognosis can be assigned and clinical treatment differentiated. For instance, AKI involving acute tubular necrosis (ATN) is expected to have a worse prognosis than prerenal, purely hemodynamic AKI. However, no biomarker has been unambiguously associated with tubular cell death or is able to provide etiological distinction. We used a cell-based system to identify TCP1-eta in the culture medium as a noninvasive marker of damaged renal tubular cells. In rat models of AKI, TCP1-eta was increased in the urine co-relating with renal cortical tubule damage. When kidneys from ATN rats were perfused in situ with Krebs-dextran solution, a portion of the urinary TCP1-eta protein content excreted into urine disappeared, and another portion remained within the urine. These results indicated that TCP1-eta was secreted by tubule cells and was not fully reabsorbed by the damaged tubules, both effects contributing to the increased urinary excretion. Urinary TCP1-eta is found in many etiologically heterogeneous AKI patients, and is statistically higher in patients partially recovered from severe AKI. In conclusion, urinary TCP1-eta poses a potential, substratifying biomarker of renal cortical damage associated with bad prognosis.
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Affiliation(s)
- Sandra M Sancho-Martínez
- Institute of Biomedical Research of Salamanca (IBSAL), Salamanca, Spain.,Department of Physiology and Pharmacology, University of Salamanca, Salamanca, Spain.,Group of Translational Research on Renal and Cardiovascular Diseases (TRECARD), Salamanca, Spain.,Group of Biomedical Research on Critical Care (BioCritic), Valladolid, Spain.,Spanish Renal Research Network (REDinREN), Instituto de Salud Carlos III, Madrid, Spain
| | - Fernando Sánchez-Juanes
- Institute of Biomedical Research of Salamanca (IBSAL), Salamanca, Spain.,Instituto de Estudios de Ciencias de la Salud de Castilla y León (IECSCYL), Soria, Spain
| | - Víctor Blanco-Gozalo
- Institute of Biomedical Research of Salamanca (IBSAL), Salamanca, Spain.,Department of Physiology and Pharmacology, University of Salamanca, Salamanca, Spain.,Group of Translational Research on Renal and Cardiovascular Diseases (TRECARD), Salamanca, Spain
| | - Miguel Fontecha-Barriuso
- Institute of Biomedical Research of Salamanca (IBSAL), Salamanca, Spain.,Department of Physiology and Pharmacology, University of Salamanca, Salamanca, Spain.,Spanish Renal Research Network (REDinREN), Instituto de Salud Carlos III, Madrid, Spain
| | - Laura Prieto-García
- Institute of Biomedical Research of Salamanca (IBSAL), Salamanca, Spain.,Group of Translational Research on Renal and Cardiovascular Diseases (TRECARD), Salamanca, Spain.,Instituto de Estudios de Ciencias de la Salud de Castilla y León (IECSCYL), Soria, Spain
| | - Isabel Fuentes-Calvo
- Institute of Biomedical Research of Salamanca (IBSAL), Salamanca, Spain.,Department of Physiology and Pharmacology, University of Salamanca, Salamanca, Spain.,Group of Translational Research on Renal and Cardiovascular Diseases (TRECARD), Salamanca, Spain.,Group of Biomedical Research on Critical Care (BioCritic), Valladolid, Spain.,Spanish Renal Research Network (REDinREN), Instituto de Salud Carlos III, Madrid, Spain
| | - José M González-Buitrago
- Institute of Biomedical Research of Salamanca (IBSAL), Salamanca, Spain.,Group of Translational Research on Renal and Cardiovascular Diseases (TRECARD), Salamanca, Spain.,Instituto de Estudios de Ciencias de la Salud de Castilla y León (IECSCYL), Soria, Spain
| | - Ana I Morales
- Institute of Biomedical Research of Salamanca (IBSAL), Salamanca, Spain.,Department of Physiology and Pharmacology, University of Salamanca, Salamanca, Spain.,Group of Translational Research on Renal and Cardiovascular Diseases (TRECARD), Salamanca, Spain.,Group of Biomedical Research on Critical Care (BioCritic), Valladolid, Spain.,Spanish Renal Research Network (REDinREN), Instituto de Salud Carlos III, Madrid, Spain
| | - Carlos Martínez-Salgado
- Institute of Biomedical Research of Salamanca (IBSAL), Salamanca, Spain.,Department of Physiology and Pharmacology, University of Salamanca, Salamanca, Spain.,Group of Translational Research on Renal and Cardiovascular Diseases (TRECARD), Salamanca, Spain.,Group of Biomedical Research on Critical Care (BioCritic), Valladolid, Spain.,Spanish Renal Research Network (REDinREN), Instituto de Salud Carlos III, Madrid, Spain.,Instituto de Estudios de Ciencias de la Salud de Castilla y León (IECSCYL), Soria, Spain
| | - María A Ramos-Barron
- Department of Nephrology, Instituto de Investigación Sanitaria Valdecilla (IDIVAL), Hospital Universitario Marqués de Valdecilla, Santander, Spain
| | - Carlos Gómez-Alamillo
- Department of Nephrology, Instituto de Investigación Sanitaria Valdecilla (IDIVAL), Hospital Universitario Marqués de Valdecilla, Santander, Spain
| | - Manuel Arias
- Department of Nephrology, Instituto de Investigación Sanitaria Valdecilla (IDIVAL), Hospital Universitario Marqués de Valdecilla, Santander, Spain
| | - José M López-Novoa
- Institute of Biomedical Research of Salamanca (IBSAL), Salamanca, Spain.,Department of Physiology and Pharmacology, University of Salamanca, Salamanca, Spain.,Group of Translational Research on Renal and Cardiovascular Diseases (TRECARD), Salamanca, Spain
| | - Francisco J López-Hernández
- Institute of Biomedical Research of Salamanca (IBSAL), Salamanca, Spain.,Department of Physiology and Pharmacology, University of Salamanca, Salamanca, Spain.,Group of Translational Research on Renal and Cardiovascular Diseases (TRECARD), Salamanca, Spain.,Group of Biomedical Research on Critical Care (BioCritic), Valladolid, Spain.,Spanish Renal Research Network (REDinREN), Instituto de Salud Carlos III, Madrid, Spain.,Instituto de Estudios de Ciencias de la Salud de Castilla y León (IECSCYL), Soria, Spain
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18
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CSNK1G2 differently sensitizes tamoxifen-induced decrease in PI3K/AKT/mTOR/S6K and ERK signaling according to the estrogen receptor existence in breast cancer cells. PLoS One 2021; 16:e0246264. [PMID: 33861751 PMCID: PMC8051802 DOI: 10.1371/journal.pone.0246264] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Accepted: 01/17/2021] [Indexed: 11/19/2022] Open
Abstract
Tamoxifen (TAM) is a selective estrogen receptor modulator used for breast cancer patients. Prolonged use of tamoxifen is not recommended for some patients. In this study, we aimed to identify molecular targets sensitive to TAM using a genome-wide gene deletion library screening of fission yeast heterozygous mutants. From the screening, casein kinase 1 gamma 2 (CSNK1G2), a serine-/threonine protein kinase, was the most sensitive target to TAM with a significant cytotoxicity in estrogen receptor-positive (ER+) breast cancer cells but with only a slight toxicity in the case of ER- cells. In addition, tumor sphere formation and expression of breast stem cell marker genes such as CD44/CD2 were greatly inhibited by CSNK1G2 knockdown in ER+ breast cancer cells. Consistently, CSNK1G2 altered ERα activity via phosphorylation, specifically at serine (Ser)167, as well as the regulation of estrogen-responsive element (ERE) of estrogen-responsive genes such as CTSD and GREB1. However, ERα silencing almost completely blocked CSNK1G2-induced TAM sensitivity. In ER+ breast cancer cells, combined treatment with TAM and CSNK1G2 knockdown further enhanced the TAM-mediated decrease in phosphatidylinositol 3-kinase (PI3K)/AKT/mammalian target of rapamycin (mTOR)/ribosomal protein S6 kinase (S6K) signaling but not extracellular signal-regulated kinase (ERK) signaling. Inversely, in ER- cells treated with TAM, only ERK and PI3K signaling was altered by CSNK1G2 knockdown. The CK1 inhibitor, D4476, partly mimicked the CSNK1G2 knockdown effect in ER+ breast cancer cells, but with a broader repression ranging from PI3K/AKT/mTOR/S6K to ERK signaling. Collectively, these results suggest that CSNK1G2 plays a key role in sensitizing TAM toxicity in ER+ and ER- breast cancer cells via differently regulating PI3K/AKT/mTOR/S6K and ERK signaling.
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19
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Martín-Cófreces NB, Valpuesta JM, Sánchez-Madrid F. Folding for the Immune Synapse: CCT Chaperonin and the Cytoskeleton. Front Cell Dev Biol 2021; 9:658460. [PMID: 33912568 PMCID: PMC8075050 DOI: 10.3389/fcell.2021.658460] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Accepted: 03/23/2021] [Indexed: 12/17/2022] Open
Abstract
Lymphocytes rearrange their shape, membrane receptors and organelles during cognate contacts with antigen-presenting cells (APCs). Activation of T cells by APCs through pMHC-TCR/CD3 interaction (peptide-major histocompatibility complex-T cell receptor/CD3 complexes) involves different steps that lead to the reorganization of the cytoskeleton and organelles and, eventually, activation of nuclear factors allowing transcription and ultimately, replication and cell division. Both the positioning of the lymphocyte centrosome in close proximity to the APC and the nucleation of a dense microtubule network beneath the plasma membrane from the centrosome support the T cell's intracellular polarity. Signaling from the TCR is facilitated by this traffic, which constitutes an important pathway for regulation of T cell activation. The coordinated enrichment upon T cell stimulation of the chaperonin CCT (chaperonin-containing tailless complex polypeptide 1; also termed TRiC) and tubulins at the centrosome area support polarized tubulin polymerization and T cell activation. The proteasome is also enriched in the centrosome of activated T cells, providing a mechanism to balance local protein synthesis and degradation. CCT assists the folding of proteins coming from de novo synthesis, therefore favoring mRNA translation. The functional role of this chaperonin in regulating cytoskeletal composition and dynamics at the immune synapse is discussed.
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Affiliation(s)
- Noa Beatriz Martín-Cófreces
- Immunology Service, Hospital Universitario de la Princesa, Universidad Autonoma Madrid (UAM), Instituto Investigacion Sanitaria-Instituto Princesa (IIS-IP), Madrid, Spain.,Area of Vascular Pathophysiology, Laboratory of Intercellular Communication, Fundación Centro Nacional de Investigaciones Cardiovasculares-Carlos III, Madrid, Spain.,Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares (CIBERCV), Madrid, Spain
| | | | - Francisco Sánchez-Madrid
- Immunology Service, Hospital Universitario de la Princesa, Universidad Autonoma Madrid (UAM), Instituto Investigacion Sanitaria-Instituto Princesa (IIS-IP), Madrid, Spain.,Area of Vascular Pathophysiology, Laboratory of Intercellular Communication, Fundación Centro Nacional de Investigaciones Cardiovasculares-Carlos III, Madrid, Spain.,Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares (CIBERCV), Madrid, Spain
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20
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Tang HW, Weng JH, Lee WX, Hu Y, Gu L, Cho S, Lee G, Binari R, Li C, Cheng ME, Kim AR, Xu J, Shen Z, Xu C, Asara JM, Blenis J, Perrimon N. mTORC1-chaperonin CCT signaling regulates m 6A RNA methylation to suppress autophagy. Proc Natl Acad Sci U S A 2021; 118:e2021945118. [PMID: 33649236 PMCID: PMC7958400 DOI: 10.1073/pnas.2021945118] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Mechanistic Target of Rapamycin Complex 1 (mTORC1) is a central regulator of cell growth and metabolism that senses and integrates nutritional and environmental cues with cellular responses. Recent studies have revealed critical roles of mTORC1 in RNA biogenesis and processing. Here, we find that the m6A methyltransferase complex (MTC) is a downstream effector of mTORC1 during autophagy in Drosophila and human cells. Furthermore, we show that the Chaperonin Containing Tailless complex polypeptide 1 (CCT) complex, which facilitates protein folding, acts as a link between mTORC1 and MTC. The mTORC1 activates the chaperonin CCT complex to stabilize MTC, thereby increasing m6A levels on the messenger RNAs encoding autophagy-related genes, leading to their degradation and suppression of autophagy. Altogether, our study reveals an evolutionarily conserved mechanism linking mTORC1 signaling with m6A RNA methylation and demonstrates their roles in suppressing autophagy.
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Affiliation(s)
- Hong-Wen Tang
- Program in Cancer and Stem Cell Biology, Duke-NUS Medical School, Singapore 169857, Singapore;
- Department of Genetics, Blavatnik Institute, Harvard Medical School, Boston, MA 02115
| | - Jui-Hsia Weng
- Department of Systems Biology, Harvard Medical School, Boston, MA 02115
| | - Wen Xing Lee
- Program in Cancer and Stem Cell Biology, Duke-NUS Medical School, Singapore 169857, Singapore
| | - Yanhui Hu
- Department of Genetics, Blavatnik Institute, Harvard Medical School, Boston, MA 02115
| | - Lei Gu
- Division of Newborn Medicine and Epigenetics Program, Department of Medicine, Boston Children's Hospital, Boston, MA 02115
- Department of Cell Biology, Harvard Medical School, Boston, MA 02115
- Max Planck Institute for Heart and Lung Research, 61231 Bad Nauheim, Germany
| | - Sungyun Cho
- Department of Pharmacology, Meyer Cancer Center, Weill Cornell Medicine, New York, NY 10065
| | - Gina Lee
- Department of Pharmacology, Meyer Cancer Center, Weill Cornell Medicine, New York, NY 10065
- Department of Microbiology and Molecular Genetics, Chao Family Comprehensive Cancer Center, University of California Irvine School of Medicine, Irvine, CA 92697
| | - Richard Binari
- Department of Genetics, Blavatnik Institute, Harvard Medical School, Boston, MA 02115
| | - Cathleen Li
- Department of Genetics, Blavatnik Institute, Harvard Medical School, Boston, MA 02115
| | - Min En Cheng
- Program in Cancer and Stem Cell Biology, Duke-NUS Medical School, Singapore 169857, Singapore
| | - Ah-Ram Kim
- Department of Genetics, Blavatnik Institute, Harvard Medical School, Boston, MA 02115
| | - Jun Xu
- Department of Genetics, Blavatnik Institute, Harvard Medical School, Boston, MA 02115
| | - Zhangfei Shen
- Division of Newborn Medicine and Epigenetics Program, Department of Medicine, Boston Children's Hospital, Boston, MA 02115
- Department of Cell Biology, Harvard Medical School, Boston, MA 02115
| | - Chiwei Xu
- Department of Genetics, Blavatnik Institute, Harvard Medical School, Boston, MA 02115
| | - John M Asara
- Division of Signal Transduction, Beth Israel Deaconess Medical Center, Boston, MA 02115
- Department of Medicine, Harvard Medical School, Boston, MA 02115
| | - John Blenis
- Department of Pharmacology, Meyer Cancer Center, Weill Cornell Medicine, New York, NY 10065
| | - Norbert Perrimon
- Department of Genetics, Blavatnik Institute, Harvard Medical School, Boston, MA 02115;
- Howard Hughes Medical Institute, Harvard Medical School, Boston, MA 02115
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Chang YX, Lin YF, Chen CL, Huang MS, Hsiao M, Liang PH. Chaperonin-Containing TCP-1 Promotes Cancer Chemoresistance and Metastasis through the AKT-GSK3β-β-Catenin and XIAP-Survivin Pathways. Cancers (Basel) 2020; 12:cancers12123865. [PMID: 33371405 PMCID: PMC7767469 DOI: 10.3390/cancers12123865] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Revised: 12/15/2020] [Accepted: 12/16/2020] [Indexed: 12/27/2022] Open
Abstract
Simple Summary CCT is a chaperonin that participates in folding intracellular proteins. We found that endogenously high expression of the subunit CCT-β is associated with a poorer chemotherapy response in clinical cancer patients. Using two cancer cell lines with higher CCT-β levels, a triple-negative breast cancer cell line MDA-MB-231 and a highly metastatic non-small-cell lung cancer cell line CL1-5, we demonstrated that upregulation of CCT-β expression correlated with chemoresistance and metastasis of these cancer cells in vitro and in vivo. Mechanistic studies allowed us to identify the AKT-GSK3β-β-catenin and XIAP-Survivin pathways promoted by CCT-β to account for the observations. The results provided by our studies are important for developing diagnostic and therapeutic strategies for combating CCT-β-overexpressed cancers. Abstract Chaperonin-containing TCP-1 (CCT) is a chaperonin composed of eight subunits that participates in intracellular protein folding. Here, we showed that increased levels of subunits of CCT, particularly CCT-β, were significantly correlated with lower survival rates for cancer patients. Endogenously high expression of CCT-β was found in cancer cell lines, such as the triple-negative breast cancer cell line MDA-MB-231 and the highly metastatic non-small-cell lung cancer cell line CL1-5. Knocking down CCT-β in these cancer cells led to decreased levels of anti-apoptotic proteins, such as XIAP, as well as inhibited phosphorylation of Ser473-AKT and GSK3, resulting in decrease of the nucleus-entering form of β-catenin; these changes reduced the chemoresistance and migration/invasion of the cells. Conversely, overexpression of CCT-β recovered the chemoresistance and cell migration/invasion by promoting the AKT-GSK3β-β-catenin and XIAP-Survivin pathways. Coimmunoprecipitation data revealed that the CCT complex might directly bind and stabilize XIAP and β-catenin. This study not only elucidates the roles of CCT in chemoresistance and metastasis, which are two major obstacles for current cancer therapy, but also provides a possible therapeutic strategy against cancers with overexpressed CCT-β.
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Affiliation(s)
- Yun-Xun Chang
- Institute of Biochemical Sciences, National Taiwan University, Taipei 10617, Taiwan;
| | - Yuan-Feng Lin
- Graduate Institute of Clinical Medicine, College of Medicine, Taipei Medical University, Taipei 11031, Taiwan;
| | - Chi-Long Chen
- Department of Pathology, College of Medicine, Taipei Medical University, Taipei 11031, Taiwan;
- Department of Pathology, Taipei Medical University Hospital, Taipei 11031, Taiwan
| | - Ming-Shyan Huang
- Department of Internal Medicine, E-Da Cancer Hospital, School of Medicine, I-Shou University, Kaohsiung 82445, Taiwan;
| | - Michael Hsiao
- Genomics Research Center, Academia Sinica, Taipei 11529, Taiwan;
| | - Po-Huang Liang
- Institute of Biochemical Sciences, National Taiwan University, Taipei 10617, Taiwan;
- Institute of Biological Chemistry, Academia Sinica, 128 Academia Road, Taipei 11529, Taiwan
- Correspondence: ; Tel.: +886-2-3366-4069; Fax: +886-2-2363-5038
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22
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Scarpin MR, Leiboff S, Brunkard JO. Parallel global profiling of plant TOR dynamics reveals a conserved role for LARP1 in translation. eLife 2020; 9:e58795. [PMID: 33054972 PMCID: PMC7584452 DOI: 10.7554/elife.58795] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Accepted: 10/14/2020] [Indexed: 12/15/2022] Open
Abstract
Target of rapamycin (TOR) is a protein kinase that coordinates eukaryotic metabolism. In mammals, TOR specifically promotes translation of ribosomal protein (RP) mRNAs when amino acids are available to support protein synthesis. The mechanisms controlling translation downstream from TOR remain contested, however, and are largely unexplored in plants. To define these mechanisms in plants, we globally profiled the plant TOR-regulated transcriptome, translatome, proteome, and phosphoproteome. We found that TOR regulates ribosome biogenesis in plants at multiple levels, but through mechanisms that do not directly depend on 5' oligopyrimidine tract motifs (5'TOPs) found in mammalian RP mRNAs. We then show that the TOR-LARP1-5'TOP signaling axis is conserved in plants and regulates expression of a core set of eukaryotic 5'TOP mRNAs, as well as new, plant-specific 5'TOP mRNAs. Our study illuminates ancestral roles of the TOR-LARP1-5'TOP metabolic regulatory network and provides evolutionary context for ongoing debates about the molecular function of LARP1.
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Affiliation(s)
- M Regina Scarpin
- Department of Plant and Microbial Biology, University of California at BerkeleyBerkeleyUnited States
- Plant Gene Expression Center, U.S. Department of Agriculture Agricultural Research ServiceAlbanyUnited States
| | - Samuel Leiboff
- Department of Plant and Microbial Biology, University of California at BerkeleyBerkeleyUnited States
- Plant Gene Expression Center, U.S. Department of Agriculture Agricultural Research ServiceAlbanyUnited States
- Department of Botany and Plant Pathology, Oregon State UniversityCorvallisUnited States
| | - Jacob O Brunkard
- Department of Plant and Microbial Biology, University of California at BerkeleyBerkeleyUnited States
- Plant Gene Expression Center, U.S. Department of Agriculture Agricultural Research ServiceAlbanyUnited States
- Laboratory of Genetics, University of Wisconsin—MadisonMadisonUnited States
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23
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Blanco-Gozalo V, Casanova AG, Sancho-Martínez SM, Prieto M, Quiros Y, Morales AI, Martínez-Salgado C, Agüeros-Blanco C, Benito-Hernández A, Ramos-Barron MA, Gómez-Alamillo C, Arias M, López-Hernández FJ. Combined use of GM2AP and TCP1-eta urinary levels predicts recovery from intrinsic acute kidney injury. Sci Rep 2020; 10:11599. [PMID: 32665654 PMCID: PMC7360779 DOI: 10.1038/s41598-020-68398-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Accepted: 06/15/2020] [Indexed: 12/21/2022] Open
Abstract
Deficient recovery from acute kidney injury (AKI) has immediate and long-term health, clinical and economic consequences. Pre-emptive recovery estimation may improve nephrology referral, optimize decision making, enrollment in trials, and provide key information for subsequent clinical handling and follow-up. For this purpose, new biomarkers are needed that predict outcome during the AKI episode. We hypothesized that damage pattern-specific biomarkers are expected to more closely associate to outcome within distinct subpopulations (i.e. those affected by specific pathological processes determining a specific outcome), as biomarker pleiotropy (i.e. associated to phenomena unrelated to AKI) introduced by unselected, heterogeneous populations may blur statistics. A panel of urinary biomarkers was measured in patients with AKI and their capacity to associate to normal or abnormal recovery was studied in the whole cohort or after sub-classification by AKI etiology, namely pre-renal and intrinsic AKI. A combination of urinary GM2AP and TCP1-eta best associates with recovery from AKI, specifically within the sub-population of renal AKI patients. This two-step strategy generates a multidimensional space in which patients with specific characteristics (i.e. renal AKI patients with good or bad prognosis) can be identified based on a collection of biomarkers working serially, applying pathophysiology-driven criteria to estimate AKI recovery, to facilitate pre-emptive and personalized handling.
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Affiliation(s)
- Víctor Blanco-Gozalo
- Institute of Biomedical Research of Salamanca (IBSAL), Salamanca, Spain.,Department of Physiology and Pharmacology, University of Salamanca, Edificio Departamental, S-20, Campus Miguel de Unamuno, 37007, Salamanca, Spain.,Group of Translational Research On Renal and Cardiovascular Diseases (TRECARD), Salamanca, Spain.,National Network for Kidney Research REDINREN, RD016/0009/0025, Instituto de Salud Carlos III, Madrid, Spain
| | - Alfredo G Casanova
- Institute of Biomedical Research of Salamanca (IBSAL), Salamanca, Spain.,Department of Physiology and Pharmacology, University of Salamanca, Edificio Departamental, S-20, Campus Miguel de Unamuno, 37007, Salamanca, Spain.,Instituto de Estudios de Ciencias de La Salud de Castilla y León (IECSCYL), Soria, Spain.,Group of Translational Research On Renal and Cardiovascular Diseases (TRECARD), Salamanca, Spain
| | - Sandra M Sancho-Martínez
- Institute of Biomedical Research of Salamanca (IBSAL), Salamanca, Spain.,Department of Physiology and Pharmacology, University of Salamanca, Edificio Departamental, S-20, Campus Miguel de Unamuno, 37007, Salamanca, Spain.,Group of Translational Research On Renal and Cardiovascular Diseases (TRECARD), Salamanca, Spain.,National Network for Kidney Research REDINREN, RD016/0009/0025, Instituto de Salud Carlos III, Madrid, Spain
| | - Marta Prieto
- Institute of Biomedical Research of Salamanca (IBSAL), Salamanca, Spain.,Department of Physiology and Pharmacology, University of Salamanca, Edificio Departamental, S-20, Campus Miguel de Unamuno, 37007, Salamanca, Spain.,Group of Translational Research On Renal and Cardiovascular Diseases (TRECARD), Salamanca, Spain.,National Network for Kidney Research REDINREN, RD016/0009/0025, Instituto de Salud Carlos III, Madrid, Spain
| | - Yaremi Quiros
- Institute of Biomedical Research of Salamanca (IBSAL), Salamanca, Spain.,Department of Physiology and Pharmacology, University of Salamanca, Edificio Departamental, S-20, Campus Miguel de Unamuno, 37007, Salamanca, Spain.,Instituto de Estudios de Ciencias de La Salud de Castilla y León (IECSCYL), Soria, Spain.,Group of Translational Research On Renal and Cardiovascular Diseases (TRECARD), Salamanca, Spain
| | - Ana I Morales
- Institute of Biomedical Research of Salamanca (IBSAL), Salamanca, Spain.,Department of Physiology and Pharmacology, University of Salamanca, Edificio Departamental, S-20, Campus Miguel de Unamuno, 37007, Salamanca, Spain.,Group of Translational Research On Renal and Cardiovascular Diseases (TRECARD), Salamanca, Spain.,Group of Biomedical Research on Critical Care (BioCritic), Valladolid, Spain.,National Network for Kidney Research REDINREN, RD016/0009/0025, Instituto de Salud Carlos III, Madrid, Spain
| | - Carlos Martínez-Salgado
- Institute of Biomedical Research of Salamanca (IBSAL), Salamanca, Spain.,Department of Physiology and Pharmacology, University of Salamanca, Edificio Departamental, S-20, Campus Miguel de Unamuno, 37007, Salamanca, Spain.,Instituto de Estudios de Ciencias de La Salud de Castilla y León (IECSCYL), Soria, Spain.,Group of Translational Research On Renal and Cardiovascular Diseases (TRECARD), Salamanca, Spain
| | - Consuelo Agüeros-Blanco
- Department of Nephrology, Hospital Universitario Marqués de Valdecilla, Instituto de Investigación Sanitaria Valdecilla (IDIVAL), Santander, Spain
| | - Adalberto Benito-Hernández
- Department of Nephrology, Hospital Universitario Marqués de Valdecilla, Instituto de Investigación Sanitaria Valdecilla (IDIVAL), Santander, Spain
| | - María A Ramos-Barron
- Department of Nephrology, Hospital Universitario Marqués de Valdecilla, Instituto de Investigación Sanitaria Valdecilla (IDIVAL), Santander, Spain
| | - Carlos Gómez-Alamillo
- Department of Nephrology, Hospital Universitario Marqués de Valdecilla, Instituto de Investigación Sanitaria Valdecilla (IDIVAL), Santander, Spain
| | - Manuel Arias
- Department of Nephrology, Hospital Universitario Marqués de Valdecilla, Instituto de Investigación Sanitaria Valdecilla (IDIVAL), Santander, Spain
| | - Francisco J López-Hernández
- Institute of Biomedical Research of Salamanca (IBSAL), Salamanca, Spain. .,Department of Physiology and Pharmacology, University of Salamanca, Edificio Departamental, S-20, Campus Miguel de Unamuno, 37007, Salamanca, Spain. .,Instituto de Estudios de Ciencias de La Salud de Castilla y León (IECSCYL), Soria, Spain. .,Group of Translational Research On Renal and Cardiovascular Diseases (TRECARD), Salamanca, Spain. .,Group of Biomedical Research on Critical Care (BioCritic), Valladolid, Spain. .,National Network for Kidney Research REDINREN, RD016/0009/0025, Instituto de Salud Carlos III, Madrid, Spain.
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24
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Chou PC, Rajput S, Zhao X, Patel C, Albaciete D, Oh WJ, Daguplo HQ, Patel N, Su B, Werlen G, Jacinto E. mTORC2 Is Involved in the Induction of RSK Phosphorylation by Serum or Nutrient Starvation. Cells 2020; 9:E1567. [PMID: 32605013 PMCID: PMC7408474 DOI: 10.3390/cells9071567] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2020] [Revised: 06/17/2020] [Accepted: 06/23/2020] [Indexed: 12/26/2022] Open
Abstract
Cells adjust to nutrient fluctuations to restore metabolic homeostasis. The mechanistic target of rapamycin (mTOR) complex 2 responds to nutrient levels and growth signals to phosphorylate protein kinases belonging to the AGC (Protein Kinases A,G,C) family such as Akt and PKC. Phosphorylation of these AGC kinases at their conserved hydrophobic motif (HM) site by mTORC2 enhances their activation and mediates the functions of mTORC2 in cell growth and metabolism. Another AGC kinase family member that is known to undergo increased phosphorylation at the homologous HM site (Ser380) is the p90 ribosomal S6 kinase (RSK). Phosphorylation at Ser380 is facilitated by the activation of the mitogen-activated protein kinase/extracellular signal regulated kinase (MAPK/ERK) in response to growth factor stimulation. Here, we demonstrate that optimal phosphorylation of RSK at this site requires an intact mTORC2. We also found that RSK is robustly phosphorylated at Ser380 upon nutrient withdrawal or inhibition of glycolysis, conditions that increase mTORC2 activation. However, pharmacological inhibition of mTOR did not abolish RSK phosphorylation at Ser380, indicating that mTOR catalytic activity is not required for this phosphorylation. Since RSK and SIN1β colocalize at the membrane during serum restimulation and acute glutamine withdrawal, mTORC2 could act as a scaffold to enhance RSK HM site phosphorylation. Among the known RSK substrates, the CCTβ subunit of the chaperonin containing TCP-1 (CCT) complex had defective phosphorylation in the absence of mTORC2. Our findings indicate that the mTORC2-mediated phosphorylation of the RSK HM site could confer RSK substrate specificity and reveal that RSK responds to nutrient fluctuations.
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Affiliation(s)
- Po-Chien Chou
- Department of Biochemistry and Molecular Biology, Rutgers-Robert Wood Johnson Medical School, Piscataway, NJ 08854, USA; (P.-C.C.); (S.R.); (C.P.); (D.A.); (W.J.O.); (H.Q.D.); (N.P.); (G.W.)
| | - Swati Rajput
- Department of Biochemistry and Molecular Biology, Rutgers-Robert Wood Johnson Medical School, Piscataway, NJ 08854, USA; (P.-C.C.); (S.R.); (C.P.); (D.A.); (W.J.O.); (H.Q.D.); (N.P.); (G.W.)
| | - Xiaoyun Zhao
- Department of Immunology and Microbiology, Shanghai Jiao Tong University School of Medicine, Shanghai 200240, China; (X.Z.); (B.S.)
| | - Chadni Patel
- Department of Biochemistry and Molecular Biology, Rutgers-Robert Wood Johnson Medical School, Piscataway, NJ 08854, USA; (P.-C.C.); (S.R.); (C.P.); (D.A.); (W.J.O.); (H.Q.D.); (N.P.); (G.W.)
| | - Danielle Albaciete
- Department of Biochemistry and Molecular Biology, Rutgers-Robert Wood Johnson Medical School, Piscataway, NJ 08854, USA; (P.-C.C.); (S.R.); (C.P.); (D.A.); (W.J.O.); (H.Q.D.); (N.P.); (G.W.)
| | - Won Jun Oh
- Department of Biochemistry and Molecular Biology, Rutgers-Robert Wood Johnson Medical School, Piscataway, NJ 08854, USA; (P.-C.C.); (S.R.); (C.P.); (D.A.); (W.J.O.); (H.Q.D.); (N.P.); (G.W.)
| | - Heineken Queen Daguplo
- Department of Biochemistry and Molecular Biology, Rutgers-Robert Wood Johnson Medical School, Piscataway, NJ 08854, USA; (P.-C.C.); (S.R.); (C.P.); (D.A.); (W.J.O.); (H.Q.D.); (N.P.); (G.W.)
| | - Nikhil Patel
- Department of Biochemistry and Molecular Biology, Rutgers-Robert Wood Johnson Medical School, Piscataway, NJ 08854, USA; (P.-C.C.); (S.R.); (C.P.); (D.A.); (W.J.O.); (H.Q.D.); (N.P.); (G.W.)
| | - Bing Su
- Department of Immunology and Microbiology, Shanghai Jiao Tong University School of Medicine, Shanghai 200240, China; (X.Z.); (B.S.)
| | - Guy Werlen
- Department of Biochemistry and Molecular Biology, Rutgers-Robert Wood Johnson Medical School, Piscataway, NJ 08854, USA; (P.-C.C.); (S.R.); (C.P.); (D.A.); (W.J.O.); (H.Q.D.); (N.P.); (G.W.)
| | - Estela Jacinto
- Department of Biochemistry and Molecular Biology, Rutgers-Robert Wood Johnson Medical School, Piscataway, NJ 08854, USA; (P.-C.C.); (S.R.); (C.P.); (D.A.); (W.J.O.); (H.Q.D.); (N.P.); (G.W.)
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25
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Li M, Chen H, Sun T, Ma Z, Chen X, Wu D, Huang W, Wang X. p70S6K Promotes Acquired Resistance of Erlotinib Through Induction of Epithelial-Mesenchymal Transition in Non-Small Cell Lung Carcinoma. Onco Targets Ther 2020; 13:5257-5270. [PMID: 32606745 PMCID: PMC7295111 DOI: 10.2147/ott.s249695] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Accepted: 05/11/2020] [Indexed: 11/27/2022] Open
Abstract
Background Lung cancer is the leading cause of cancer-related deaths. EGFR tyrosine kinase inhibitors, such as erlotinib, were approved for non-small cell lung carcinoma patients with EGFR mutations. However, the acquired resistance of these inhibitors has not been fully clarified. Therefore, clarifying the mechanism and developing new rationales to overcome the drug resistance are urgently needed. Methods A pair of erlotinib sensitive and resistant cells was used to identify the key molecules in mediating erlotinib resistance. Loss- or gain-of-function study was used to confirm the effects of the key molecules. Xenograft mouse model and human cancer tissue sample studies were conducted for further corroboration. Results HCC827 cells with acquired resistance to erlotinib underwent epithelial-mesenchymal transition and exhibited enhanced p70S6K signaling compared to parental sensitive cells. Moreover, in erlotinib resistant cells, downregulation of p70S6K expression using either siRNA or shRNA reversed EMT and partially overcame erlotinib resistance. Meanwhile, in erlotinib sensitive cells, overexpression of p70S6K promoted EMT and induced erlotinib resistance. Upregulation of p70S6K signaling in erlotinib resistant cells was caused by reduced GSK3β-mediated protein degradation of mTOR and raptor. Additionally, p70S6K silencing suppressed the growth of erlotinib resistant cells in a xenograft mouse model. Finally, we found a correlation between p70S6K and E-cadherin expression in human non-small-cell lung cancer (NSCLC) tissue samples. Conclusion Our findings suggest that p70S6K-induced EMT plays an important role in the acquired resistance of erlotinib and provides a novel therapeutic rationale of targeting p70S6K in NSCLC therapy.
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Affiliation(s)
- Min Li
- Department of Pharmacology, Nanjing Medical University, Nanjing, Jiangsu Province, People's Republic of China, 210029
| | - Hongling Chen
- Department of Pharmacology, Nanjing Medical University, Nanjing, Jiangsu Province, People's Republic of China, 210029
| | - Tong Sun
- Key Laboratory of Human Functional Genomics of Jiangsu Province, Nanjing Medical University, Nanjing, Jiangsu Province, People's Republic of China, 210029
| | - Zhuo Ma
- Department of Pharmacology, Nanjing Medical University, Nanjing, Jiangsu Province, People's Republic of China, 210029
| | - Xi Chen
- Department of Pharmacology, Nanjing Medical University, Nanjing, Jiangsu Province, People's Republic of China, 210029
| | - Dandan Wu
- Department of Pharmacology, Nanjing Medical University, Nanjing, Jiangsu Province, People's Republic of China, 210029
| | - Wenbin Huang
- Department of Pathology, Nanjing First Hospital, Nanjing Medical University, Nanjing, Jiangsu Province, People's Republic of China, 210006
| | - Xuerong Wang
- Department of Pharmacology, Nanjing Medical University, Nanjing, Jiangsu Province, People's Republic of China, 210029
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26
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The Mammalian Target of Rapamycin–70-kDa Ribosomal Protein S6 Kinase Axis Inhibits the Biological Function of Tongue Squamous Cell Carcinoma. J Oral Maxillofac Surg 2019; 77:1928-1940. [DOI: 10.1016/j.joms.2018.09.020] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2018] [Revised: 09/12/2018] [Accepted: 09/12/2018] [Indexed: 01/19/2023]
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27
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Kim AR, Choi KW. TRiC/CCT chaperonins are essential for organ growth by interacting with insulin/TOR signaling in Drosophila. Oncogene 2019; 38:4739-4754. [PMID: 30792539 PMCID: PMC6756063 DOI: 10.1038/s41388-019-0754-1] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2018] [Revised: 12/28/2018] [Accepted: 02/08/2019] [Indexed: 12/12/2022]
Abstract
Organ size is regulated by intercellular signaling for cell growth and proliferation. The TOR pathway mediates a key signaling mechanism for controlling cell size and number in organ growth. Chaperonin containing TCP-1 (CCT) is a complex that assists protein folding and function, but its role in animal development is largely unknown. Here we show that the CCT complex is required for organ growth by interacting with the TOR pathway in Drosophila. Reduction of CCT4 results in growth defects by affecting both cell size and proliferation. Loss of CCT4 causes preferential cell death anterior to the morphogenetic furrow in the eye disc and within wing pouch in the wing disc. Depletion of any CCT subunit in the eye disc results in headless phenotype. Overgrowth by active TOR signaling is suppressed by CCT RNAi. The CCT complex physically interacts with TOR signaling components including TOR, Rheb, and S6K. Loss of CCT leads to decreased phosphorylation of S6K and S6 while increasing phosphorylation of Akt. Insulin/TOR signaling is also necessary and sufficient for promoting CCT complex transcription. Our data provide evidence that the CCT complex regulates organ growth by directly interacting with the TOR signaling pathway.
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Affiliation(s)
- Ah-Ram Kim
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 305-701, Republic of Korea.,Department of Genetics, Harvard Medical School, Boston, MA, 02115, USA
| | - Kwang-Wook Choi
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 305-701, Republic of Korea.
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28
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NVP-BEZ235 Attenuated Cell Proliferation and Migration in the Squamous Cell Carcinoma of Oral Cavities and p70S6K Inhibition Mimics its Effect. Int J Mol Sci 2018; 19:ijms19113546. [PMID: 30423811 PMCID: PMC6274880 DOI: 10.3390/ijms19113546] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2018] [Revised: 11/08/2018] [Accepted: 11/08/2018] [Indexed: 11/19/2022] Open
Abstract
NVP-BEZ235 or BEZ235 is a dual inhibitor of adenosine triphosphate (ATP)-competitive phosphoinositide 3-kinase (PI3K)/mammalian-target-of-rapamycin (mTOR) and is promising for cancer treatment. Because it targets more than one downstream effector, a dual approach is promising for cancer treatment. The aim of this study was to evaluate the efficacy of NVP-BEZ235 in treating oral cavity squamous cell carcinoma (OSCC). Two human OSCC cell lines, SCC-4 and SCC-25, were used in this study. PI3K-AKT signaling, proliferation, and cell migratory and invasion capabilities of OSCC cells were examined. In NVP-BEZ235-treated SCC-4 and SCC-25 cells, the phosphorylation of 70-kDa ribosomal S6 kinase (p70S6K), but not mTOR, decreased within 24 h. NVP-BEZ235 inhibited OSCC-cell proliferation, migration, and invasion possibly by directly deregulating the phosphorylation of p70S6K. The phospho-p70S6K inhibitor mimicked the effects of NVP-BEZ235 for preventing proliferation and weakening the migratory and invasion abilities of SCC-4 and SCC-25 cells. This study further confirmed the effect of NVP-BEZ235 on OSCC cells and provided a new strategy for controlling the proliferation, migration, and invasion of OSCC cells using the phopho-p70S6K inhibitor.
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29
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Chen XQ, Fang F, Florio JB, Rockenstein E, Masliah E, Mobley WC, Rissman RA, Wu C. T-complex protein 1-ring complex enhances retrograde axonal transport by modulating tau phosphorylation. Traffic 2018; 19:840-853. [PMID: 30120810 PMCID: PMC6191364 DOI: 10.1111/tra.12610] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2018] [Revised: 08/09/2018] [Accepted: 08/12/2018] [Indexed: 12/17/2022]
Abstract
The cytosolic chaperonin T-complex protein (TCP) 1-ring complex (TRiC) has been shown to exert neuroprotective effects on axonal transport through clearance of mutant Huntingtin (mHTT) in Huntington's disease. However, it is presently unknown if TRiC also has any effect on axonal transport in wild-type neurons. Here, we examined how TRiC impacted the retrograde axonal transport of brain-derived neurotrophic factor (BDNF). We found that expression of a single TRiC subunit significantly enhanced axonal transport of BDNF, leading to an increase in instantaneous velocity with a concomitant decrease in pauses for retrograde BDNF transport. The transport enhancing effect by TRiC was dependent on endogenous tau expression because no effect was seen in neurons from tau knockout mice. We showed that TRiC regulated the level of cyclin-dependent kinase 5 (CDK5)/p35 positively, contributing to TRiC-mediated tau phosphorylation (ptau). Expression of a single TRiC subunit increased the level of ptau while downregulation of the TRiC complex decreased ptau. We further demonstrated that TRiC-mediated increase in ptau induced detachment of tau from microtubules. Our study has thus revealed that TRiC-mediated increase in tau phosphorylation impacts retrograde axonal transport.
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Affiliation(s)
- Xu-Qiao Chen
- Department of Neurosciences, University of California San Diego, La Jolla, CA 92093
| | - Fang Fang
- Department of Neurosciences, University of California San Diego, La Jolla, CA 92093
| | - Jazmin B. Florio
- Department of Neurosciences, University of California San Diego, La Jolla, CA 92093
| | - Edward Rockenstein
- Department of Neurosciences, University of California San Diego, La Jolla, CA 92093
| | - Eliezer Masliah
- Department of Neurosciences, University of California San Diego, La Jolla, CA 92093
| | - William C. Mobley
- Department of Neurosciences, University of California San Diego, La Jolla, CA 92093
| | - Robert A. Rissman
- Department of Neurosciences, University of California San Diego, La Jolla, CA 92093
- Veterans Affairs San Diego Healthcare System, San Diego, CA 92161
| | - Chengbiao Wu
- Department of Neurosciences, University of California San Diego, La Jolla, CA 92093
- Veterans Affairs San Diego Healthcare System, San Diego, CA 92161
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30
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The structure and evolution of eukaryotic chaperonin-containing TCP-1 and its mechanism that folds actin into a protein spring. Biochem J 2018; 475:3009-3034. [DOI: 10.1042/bcj20170378] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2018] [Revised: 08/16/2018] [Accepted: 08/28/2018] [Indexed: 12/15/2022]
Abstract
Actin is folded to its native state in eukaryotic cytosol by the sequential allosteric mechanism of the chaperonin-containing TCP-1 (CCT). The CCT machine is a double-ring ATPase built from eight related subunits, CCT1–CCT8. Non-native actin interacts with specific subunits and is annealed slowly through sequential binding and hydrolysis of ATP around and across the ring system. CCT releases a folded but soft ATP-G-actin monomer which is trapped 80 kJ/mol uphill on the folding energy surface by its ATP-Mg2+/Ca2+ clasp. The energy landscape can be re-explored in the actin filament, F-actin, because ATP hydrolysis produces dehydrated and more compact ADP-actin monomers which, upon application of force and strain, are opened and closed like the elements of a spring. Actin-based myosin motor systems underpin a multitude of force generation processes in cells and muscles. We propose that the water surface of F-actin acts as a low-binding energy, directional waveguide which is recognized specifically by the myosin lever-arm domain before the system engages to form the tight-binding actomyosin complex. Such a water-mediated recognition process between actin and myosin would enable symmetry breaking through fast, low energy initial binding events. The origin of chaperonins and the subsequent emergence of the CCT–actin system in LECA (last eukaryotic common ancestor) point to the critical role of CCT in facilitating phagocytosis during early eukaryotic evolution and the transition from the bacterial world. The coupling of CCT-folding fluxes to the cell cycle, cell size control networks and cancer are discussed together with directions for further research.
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Cross Talk Networks of Mammalian Target of Rapamycin Signaling With the Ubiquitin Proteasome System and Their Clinical Implications in Multiple Myeloma. INTERNATIONAL REVIEW OF CELL AND MOLECULAR BIOLOGY 2018; 343:219-297. [PMID: 30712673 DOI: 10.1016/bs.ircmb.2018.06.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Multiple myeloma (MM) is the second most common hematological malignancy and results from the clonal amplification of plasma cells. Despite recent advances in treatment, MM remains incurable with a median survival time of only 5-6years, thus necessitating further insights into MM biology and exploitation of novel therapeutic approaches. Both the ubiquitin proteasome system (UPS) and the PI3K/Akt/mTOR signaling pathways have been implicated in the pathogenesis, and treatment of MM and different lines of evidence suggest a close cross talk between these central cell-regulatory signaling networks. In this review, we outline the interplay between the UPS and mTOR pathways and discuss their implications for the pathophysiology and therapy of MM.
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Liu J, Sareddy GR, Zhou M, Viswanadhapalli S, Li X, Lai Z, Tekmal RR, Brenner A, Vadlamudi RK. Differential Effects of Estrogen Receptor β Isoforms on Glioblastoma Progression. Cancer Res 2018; 78:3176-3189. [PMID: 29661831 DOI: 10.1158/0008-5472.can-17-3470] [Citation(s) in RCA: 61] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2017] [Revised: 03/13/2018] [Accepted: 04/11/2018] [Indexed: 12/22/2022]
Abstract
The estrogen receptor β (ERβ) functions as a tumor suppressor in glioblastoma (GBM) cells. However, the in vivo significance of endogenous ERβ and the roles of its isoforms in GBM are incompletely understood. Using ERβ isoform-specific PCR screening, we found that GBM cells predominantly express ERβ1 and ERβ5, along with low levels of ERβ2 and ERβ4. We observed greater ERβ5 expression in higher grades of glioma than in lower grades. In CRISPR-based ERβ knockout (KO) cells and ERβ KO cells uniquely expressing ERβ1 or ERβ5 only, ERβ1 significantly reduced proliferation. Compared with parental GBM cells, ERβ KO cells exhibited high migratory and invasive potentials, and reexpression of ERβ1 resulted in the reduction of this phenotype. Interestingly, ERβ5 expression increased foci formation and anchorage-independent growth of NIH3T3 cells and increased motile structure formation, including filopodia and ruffles in GBM cells. Only ERβ1-expressing tumors resulted in longer mouse survival. RNA-Seq analysis revealed unique pathways modulated by ERβ1 and ERβ5. Compared with ERβ KO cells, ERβ1 cells exhibited lower activation of mTOR signaling molecules, including p-mTOR, p-S6K, and p-S6, and ERβ5-expressing cells had enhanced mTOR downstream signaling. Unique proteins including several that function as regulators of mTOR, immunomodulatory, and apoptosis pathways bound to ERβ1 and ERβ5 isoforms. Our work confirms the tumor-suppressive potential of ERβ1 and reveals the acquired oncogenic ability of ERβ5 in GBM cells. ERβ isoform status and their unique interactions with oncogenic pathways may have important implications in GBM progression.Significance: These findings suggest that only ERβ isoform 1 has tumor suppressor function in GBM and that ERβ isoform switching contributes to GBM progression. Cancer Res; 78(12); 3176-89. ©2018 AACR.
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Affiliation(s)
- Jinyou Liu
- Department of Obstetrics and Gynecology, University of Texas Health at San Antonio, San Antonio, Texas.,Department of Oncology, Xiangya Hospital, Xiangya School of Medicine, Central South University, Changsha, Hunan, P. R. China
| | - Gangadhara R Sareddy
- Department of Obstetrics and Gynecology, University of Texas Health at San Antonio, San Antonio, Texas.,Mays Cancer Center, University of Texas Health at San Antonio, San Antonio, Texas
| | - Mei Zhou
- Department of Obstetrics and Gynecology, University of Texas Health at San Antonio, San Antonio, Texas.,Department of Gastroenterology, Second Xiangya Hospital and Xiangya School of Medicine, Central South University, Hunan, P.R. China
| | | | - Xiaonan Li
- Department of Obstetrics and Gynecology, University of Texas Health at San Antonio, San Antonio, Texas
| | - Zhao Lai
- Greehey Children's Cancer Research Institute, San Antonio, Texas
| | - Rajeshwar R Tekmal
- Department of Obstetrics and Gynecology, University of Texas Health at San Antonio, San Antonio, Texas.,Mays Cancer Center, University of Texas Health at San Antonio, San Antonio, Texas
| | - Andrew Brenner
- Mays Cancer Center, University of Texas Health at San Antonio, San Antonio, Texas.,Hematology and Oncology, University of Texas Health at San Antonio, San Antonio, Texas
| | - Ratna K Vadlamudi
- Department of Obstetrics and Gynecology, University of Texas Health at San Antonio, San Antonio, Texas. .,Mays Cancer Center, University of Texas Health at San Antonio, San Antonio, Texas
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Wu D, Cheng J, Sun G, Wu S, Li M, Gao Z, Zhai S, Li P, Su D, Wang X. p70S6K promotes IL-6-induced epithelial-mesenchymal transition and metastasis of head and neck squamous cell carcinoma. Oncotarget 2017; 7:36539-36550. [PMID: 27174914 PMCID: PMC5095019 DOI: 10.18632/oncotarget.9282] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2015] [Accepted: 04/24/2016] [Indexed: 12/14/2022] Open
Abstract
Head and neck squamous cell carcinoma (HNSCC) is the fifth most common cancer worldwide and a common cause of cancer-related death, with a 5-year survival rate of less than 60%. IL-6 has been suggested to play an important role in cancer metastasis, but its mechanism in HNSCC has not been fully clarified. p70S6K has been reported to induce epithelial-mesenchymal transition (EMT) of ovarian cancer, but its role in HNSCC remains unknown. In this study, we found that p70S6K and IL-6 were upregulated in high-metastatic HNSCC cell lines that underwent EMT when compared to paired low-metastatic cell lines. Overexpression of p70S6K promoted EMT and migration of HNSCC cells, while downregulation of p70S6K attenuated IL-6-induced EMT and cell migration. Furthermore, IL-6-induced p70S6K activation was attenuated by inhibitors of the PI3K/Akt/mTOR, MAPK/ERK, and JAK/STAT3 signaling pathways, suggesting that it located downstream of these pathways. These findings suggest that p70S6K promotes IL-6-induced EMT and metastasis of HNSCC. Targeting p70S6K for HNSCC therapy may benefit patients through the inhibition of tumor growth, as well as metastasis.
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Affiliation(s)
- Dandan Wu
- Department of Pharmacology, Nanjing Medical University, Nanjing, Jiangsu Province 210029, China.,Department of Basic Medicine, Kangda College of Nanjing Medical University, Lianyungang, Jiangsu Province 222000, China
| | - Jie Cheng
- Department of Oral and Maxillofacial Surgery, Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing, Jiangsu Province 210029, China
| | - Geng Sun
- Department of Pharmacology, Nanjing Medical University, Nanjing, Jiangsu Province 210029, China
| | - Shengjie Wu
- Department of Pharmacology, Nanjing Medical University, Nanjing, Jiangsu Province 210029, China
| | - Min Li
- Department of Pharmacology, Nanjing Medical University, Nanjing, Jiangsu Province 210029, China
| | - Zhongyuan Gao
- Department of Pharmacology, Nanjing Medical University, Nanjing, Jiangsu Province 210029, China
| | - Sulan Zhai
- Department of Pharmacology, Nanjing Medical University, Nanjing, Jiangsu Province 210029, China
| | - Ping Li
- Department of Pharmacology, Nanjing Medical University, Nanjing, Jiangsu Province 210029, China
| | - Dongming Su
- Center for Clinical Pathology and Laboratory, Affiliated Hospital of Yifu, Nanjing Medical University, Nanjing, Jiangsu Province 211166, China.,Department of Pathology, Nanjing Medical University, Nanjing, Jiangsu Province 210029, China
| | - Xuerong Wang
- Department of Pharmacology, Nanjing Medical University, Nanjing, Jiangsu Province 210029, China.,Center for Clinical Pathology and Laboratory, Affiliated Hospital of Yifu, Nanjing Medical University, Nanjing, Jiangsu Province 211166, China.,Key Laboratory of Human Functional Genomics of Jiangsu Province, Nanjing Medical University, Nanjing, Jiangsu Province 210029, China
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34
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Novozhylov DO, Karpov PA, Blume YB. Bioinformatic search for Ca2+- and calmodulin-dependent protein kinases potentially associated with the regulation of plant cytoskeleton. CYTOL GENET+ 2017. [DOI: 10.3103/s0095452717040053] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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35
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Changes in liver proteins of rats fed standard and high-fat and sucrose diets induced by fish omega-3 PUFAs and their combination with grape polyphenols according to quantitative proteomics. J Nutr Biochem 2016; 41:84-97. [PMID: 28064013 DOI: 10.1016/j.jnutbio.2016.12.005] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2016] [Revised: 11/05/2016] [Accepted: 12/15/2016] [Indexed: 12/16/2022]
Abstract
This study considered the physiological modulation of liver proteins due to the supplementation with fish oils under two dietary backgrounds: standard or high in fat and sucrose (HFHS), and their combination with grape polyphenols. By using a quantitative proteomics approach, we showed that the capacity of the supplements for regulating proteins depended on the diet; namely, 10 different proteins changed into standard diets, while 45 changed into the HFHS diets and only scarcely proteins were found altered in common. However, in both contexts, fish oils were the main regulatory force, although the addition of polyphenols was able to modulate some fish oils' effects. Moreover, we demonstrated the ability of fish oils and their combination with grape polyphenols in improving biochemical parameters and reducing lipogenesis and glycolysis enzymes, enhancing fatty acid beta-oxidation and insulin signaling and ameliorating endoplasmic reticulum stress and protein oxidation when they are included in an unhealthy diet.
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36
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Jiang X, Mao W, Yang Z, Zeng J, Zhang Y, Song Y, Kong Y, Ren S, Zuo Y. Silencing P2X7 receptor downregulates the expression of TCP-1 involved in lymphoma lymphatic metastasis. Oncotarget 2016; 6:42105-17. [PMID: 26556873 PMCID: PMC4747213 DOI: 10.18632/oncotarget.5870] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2015] [Accepted: 10/27/2015] [Indexed: 01/26/2023] Open
Abstract
P2X7R is an ATP-gated cation channel that participates in cell proliferation and apoptosis. TCP-1 assists with the protein folding. According to our previous research, the P2X7R has a potential role in P388D1 lymphoid neoplasm cells dissemination to peripheral lymph nodes. In order to make a further exploration about the probable mechanism, the lymph nodes which metastasized by P2X7R-silenced P388D1 cells or non-silenced cells were analyzed by 2DE and a MALDI-TOF-based proteomics approach. In the 64 proteins which were differentially expressed between two groups, TCP-1 was found to be significantly decreased in P2X7R shRNA group compared to controls. This correlation was also found in subsequent experiments in vivo and in vitro. The positive correlation between P2X7R and TCP-1 was also proved in both lymphoma and benign lymphadenopathy tissues from patients. It indicates that TCP-1 may be a crucial downstream molecular of P2X7R and plays a novel role in lymphoid neoplasm metastasis.
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Affiliation(s)
- Xudong Jiang
- Department of Clinical Biochemistry, College of Laboratory Diagnostic Medicine, Dalian Medical University, Dalian 116044, China
| | - Wenjuan Mao
- Department of Clinical Biochemistry, College of Laboratory Diagnostic Medicine, Dalian Medical University, Dalian 116044, China
| | - Ziyi Yang
- Department of Clinical Biochemistry, College of Laboratory Diagnostic Medicine, Dalian Medical University, Dalian 116044, China
| | - Jia Zeng
- Department of Clinical Biochemistry, College of Laboratory Diagnostic Medicine, Dalian Medical University, Dalian 116044, China
| | - Yi Zhang
- Department of Clinical Biochemistry, College of Laboratory Diagnostic Medicine, Dalian Medical University, Dalian 116044, China.,Department of Surgery, the Second Affiliated Hospital of Dalian Medical University, Dalian 116023, China
| | - Yang Song
- Department of Clinical Biochemistry, College of Laboratory Diagnostic Medicine, Dalian Medical University, Dalian 116044, China.,Department of Surgery, the Second Affiliated Hospital of Dalian Medical University, Dalian 116023, China
| | - Ying Kong
- Department of Biochemistry, College of Basic Medical Sciences, Dalian Medical University, Dalian 116044, China
| | - Shuangyi Ren
- Department of Surgery, the Second Affiliated Hospital of Dalian Medical University, Dalian 116023, China
| | - Yunfei Zuo
- Department of Clinical Biochemistry, College of Laboratory Diagnostic Medicine, Dalian Medical University, Dalian 116044, China
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37
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Pavan ICB, Yokoo S, Granato DC, Meneguello L, Carnielli CM, Tavares MR, do Amaral CL, de Freitas LB, Paes Leme AF, Luchessi AD, Simabuco FM. Different interactomes for p70-S6K1 and p54-S6K2 revealed by proteomic analysis. Proteomics 2016; 16:2650-2666. [PMID: 27493124 DOI: 10.1002/pmic.201500249] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2015] [Revised: 06/28/2016] [Accepted: 08/03/2016] [Indexed: 01/04/2023]
Abstract
S6Ks are major effectors of the mTOR (mammalian target of rapamycin) pathway, signaling for increased protein synthesis and cell growth in response to insulin, AMP/ATP levels, and amino acids. Deregulation of this pathway has been related to disorders and diseases associated with metabolism, such as obesity, diabetes, and cancer. S6K family is composed of two main members, S6K1 and S6K2, which comprise different isoforms resulted from alternative splicing or alternative start codon use. Although important molecular functions have been associated with p70-S6K1, the most extensively studied isoform, the S6K2 counterpart lacks information. In the present study, we performed immunoprecipitation assays followed by mass spectrometry (MS) analysis of FLAG-tagged p70-S6K1 and p54-S6K2 interactomes, after expression in HEK293 cells. Protein lists were submitted to CRAPome (Contaminant Repository for Affinity Purification) and SAINT (Significance Analysis of INTeractome) analysis, which allowed the identification of high-scoring interactions. By a comparative approach, p70-S6K1 interacting proteins were predominantly related to "cytoskeleton" and "stress response," whereas p54-S6K2 interactome was more associated to "transcription," "splicing," and "ribosome biogenesis." Moreover, we have found evidences for new targets or regulators of the S6K protein family, such as proteins NCL, NPM1, eIF2α, XRCC6, PARP1, and ILF2/ILF3 complex. This study provides new information about the interacting networks of S6Ks, which may contribute for future approaches to a better understanding of the mTOR/S6K pathway.
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Affiliation(s)
- Isadora C B Pavan
- Laboratory of Metabolic Disorders, School of Applied Sciences, University of Campinas, Limeira, São Paulo, Brazil
| | - Sami Yokoo
- Brazilian Biosciences National Laboratory, Brazilian Center for Research in Energy and Materials, Campinas, São Paulo, Brazil
| | - Daniela C Granato
- Brazilian Biosciences National Laboratory, Brazilian Center for Research in Energy and Materials, Campinas, São Paulo, Brazil
| | - Letícia Meneguello
- Laboratory of Biotechnology, School of Applied Sciences, University of Campinas, Limeira, São Paulo, Brazil
| | - Carolina M Carnielli
- Brazilian Biosciences National Laboratory, Brazilian Center for Research in Energy and Materials, Campinas, São Paulo, Brazil
| | - Mariana R Tavares
- Laboratory of Metabolic Disorders, School of Applied Sciences, University of Campinas, Limeira, São Paulo, Brazil
| | - Camila L do Amaral
- Laboratory of Metabolic Disorders, School of Applied Sciences, University of Campinas, Limeira, São Paulo, Brazil
| | - Lidia B de Freitas
- Laboratory of Metabolic Disorders, School of Applied Sciences, University of Campinas, Limeira, São Paulo, Brazil
| | - Adriana F Paes Leme
- Brazilian Biosciences National Laboratory, Brazilian Center for Research in Energy and Materials, Campinas, São Paulo, Brazil
| | - Augusto D Luchessi
- Laboratory of Biotechnology, School of Applied Sciences, University of Campinas, Limeira, São Paulo, Brazil
| | - Fernando M Simabuco
- Laboratory of Metabolic Disorders, School of Applied Sciences, University of Campinas, Limeira, São Paulo, Brazil.
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38
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Lim W, Song G. Naringenin-induced migration of embrynoic trophectoderm cells is mediated via PI3K/AKT and ERK1/2 MAPK signaling cascades. Mol Cell Endocrinol 2016; 428:28-37. [PMID: 26994515 DOI: 10.1016/j.mce.2016.03.018] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/08/2015] [Revised: 03/13/2016] [Accepted: 03/15/2016] [Indexed: 12/23/2022]
Abstract
For successful pregnancy, a well-coordinated network of growth factors, nutrients and hormones is required for fetal-maternal interactions. Naringenin, as a weak phytoestrogen, improves diabetes, inflammation, neuronal diseases, cardiovascular diseases and cancers. However, the role of naringenin in migration mechanism(s) of peri-implantation conceptuses is unknown. Therefore, in the present study, we determined the effects of naringenin on migration of porcine trophectoderm (pTr) cells, which is a known in vitro model for research on trophectoderm cell biology and placental-fetal developmental biology, in order to assess intracellular signal transduction pathways activated by naringenin. Migration of pTr cells increased in a dose-dependent manner in response to naringenin. Also, naringenin activated the phosphorylation of AKT and ERK1/2 proteins in a dose-dependent manner and those proteins were abundant mainly in the cytoplasm of naringenin-treated pTr cells. Within 30 min after treatment with 20 μM naringenin, the abundance of phosphorylated EKR1/2, P70S6K, P90RSK and S6K proteins increased, and then returned to basal levels by 120 min whereas the abundance of AKT increased gradually to 120 min post-treatment. However, the phosphorylation of AKT, P70S6K, P90RSK and S6K was reduced in naringenin-induced pTr cells pre-treated with a PI3K inhibitor (LY294002). Also, a MEK1/2 inhibitor (U0126) significantly decreased naringenin-induced phosphorylation of ERK1/2, P70S6K and S6K proteins in pTr cells. Moreover, the naringenin-stimulated migration of pTr cells was suppressed by LY294002 and U0126. Collectively, results of the present study suggest that naringenin supports migration of pTr cells through PI3K/AKT and ERK1/2 MAPK signaling pathways crucial for orchestrating conceptus-uterine interactions.
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Affiliation(s)
- Whasun Lim
- Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seoul 136-713, Republic of Korea
| | - Gwonhwa Song
- Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seoul 136-713, Republic of Korea.
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39
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Wandinger SK, Lahortiga I, Jacobs K, Klammer M, Jordan N, Elschenbroich S, Parade M, Jacoby E, Linders JTM, Brehmer D, Cools J, Daub H. Quantitative Phosphoproteomics Analysis of ERBB3/ERBB4 Signaling. PLoS One 2016; 11:e0146100. [PMID: 26745281 PMCID: PMC4706443 DOI: 10.1371/journal.pone.0146100] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2015] [Accepted: 12/14/2015] [Indexed: 01/12/2023] Open
Abstract
The four members of the epidermal growth factor receptor (EGFR/ERBB) family form homo- and heterodimers which mediate ligand-specific regulation of many key cellular processes in normal and cancer tissues. While signaling through the EGFR has been extensively studied on the molecular level, signal transduction through ERBB3/ERBB4 heterodimers is less well understood. Here, we generated isogenic mouse Ba/F3 cells that express full-length and functional membrane-integrated ERBB3 and ERBB4 or ERBB4 alone, to serve as a defined cellular model for biological and phosphoproteomics analysis of ERBB3/ERBB4 signaling. ERBB3 co-expression significantly enhanced Ba/F3 cell proliferation upon neuregulin-1 (NRG1) treatment. For comprehensive signaling studies we performed quantitative mass spectrometry (MS) experiments to compare the basal ERBB3/ERBB4 cell phosphoproteome to NRG1 treatment of ERBB3/ERBB4 and ERBB4 cells. We employed a workflow comprising differential isotope labeling with mTRAQ reagents followed by chromatographic peptide separation and final phosphopeptide enrichment prior to MS analysis. Overall, we identified 9686 phosphorylation sites which could be confidently localized to specific residues. Statistical analysis of three replicate experiments revealed 492 phosphorylation sites which were significantly changed in NRG1-treated ERBB3/ERBB4 cells. Bioinformatics data analysis recapitulated regulation of mitogen-activated protein kinase and Akt pathways, but also indicated signaling links to cytoskeletal functions and nuclear biology. Comparative assessment of NRG1-stimulated ERBB4 Ba/F3 cells revealed that ERBB3 did not trigger defined signaling pathways but more broadly enhanced phosphoproteome regulation in cells expressing both receptors. In conclusion, our data provide the first global picture of ERBB3/ERBB4 signaling and provide numerous potential starting points for further mechanistic studies.
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Affiliation(s)
| | - Idoya Lahortiga
- VIB Center for the Biology of Disease, Leuven, Belgium
- KU Leuven, Center for Human Genetics, Leuven, Belgium
| | - Kris Jacobs
- VIB Center for the Biology of Disease, Leuven, Belgium
- KU Leuven, Center for Human Genetics, Leuven, Belgium
| | | | | | | | - Marc Parade
- Oncology Drug Discovery, Janssen Research & Development, Janssen Pharmaceutica NV, Beerse, Belgium
| | - Edgar Jacoby
- Oncology Drug Discovery, Janssen Research & Development, Janssen Pharmaceutica NV, Beerse, Belgium
| | - Joannes T. M. Linders
- Oncology Drug Discovery, Janssen Research & Development, Janssen Pharmaceutica NV, Beerse, Belgium
| | - Dirk Brehmer
- Oncology Drug Discovery, Janssen Research & Development, Janssen Pharmaceutica NV, Beerse, Belgium
| | - Jan Cools
- VIB Center for the Biology of Disease, Leuven, Belgium
- KU Leuven, Center for Human Genetics, Leuven, Belgium
- * E-mail: (JC); (HD)
| | - Henrik Daub
- Evotec (München) GmbH, Martinsried, Germany
- * E-mail: (JC); (HD)
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40
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The S6K protein family in health and disease. Life Sci 2015; 131:1-10. [PMID: 25818187 DOI: 10.1016/j.lfs.2015.03.001] [Citation(s) in RCA: 168] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2014] [Revised: 03/02/2015] [Accepted: 03/05/2015] [Indexed: 02/06/2023]
Abstract
The S6K proteins are mTOR pathway effectors and accumulative evidence suggest that mTOR/S6K signaling contributes to several pathological conditions, such as diabetes, cancer and obesity. The activation of the mTOR/S6K axis stimulates protein synthesis and cell growth. S6K1 has two well-known isoforms, p70-S6K1 and p85-S6K1, generated by alternative translation initiation sites. A third isoform, named p31-S6K1, has been characterized as a truncated type of the protein due to alternative splicing, and reports have shown its important role in cancer. Studies involving S6K2 are scarce. This article aims to review what is new in the literature about these kinases and establish differences regarding their interacting proteins, activation and function, connecting their roles in the homeostasis of the cell and in pathological conditions.
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41
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Serbus LR, White PM, Silva JP, Rabe A, Teixeira L, Albertson R, Sullivan W. The impact of host diet on Wolbachia titer in Drosophila. PLoS Pathog 2015; 11:e1004777. [PMID: 25826386 PMCID: PMC4380406 DOI: 10.1371/journal.ppat.1004777] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2014] [Accepted: 03/03/2015] [Indexed: 12/31/2022] Open
Abstract
While a number of studies have identified host factors that influence endosymbiont titer, little is known concerning environmental influences on titer. Here we examined nutrient impact on maternally transmitted Wolbachia endosymbionts in Drosophila. We demonstrate that Drosophila reared on sucrose- and yeast-enriched diets exhibit increased and reduced Wolbachia titers in oogenesis, respectively. The yeast-induced Wolbachia depletion is mediated in large part by the somatic TOR and insulin signaling pathways. Disrupting TORC1 with the small molecule rapamycin dramatically increases oocyte Wolbachia titer, whereas hyper-activating somatic TORC1 suppresses oocyte titer. Furthermore, genetic ablation of insulin-producing cells located in the Drosophila brain abolished the yeast impact on oocyte titer. Exposure to yeast-enriched diets altered Wolbachia nucleoid morphology in oogenesis. Furthermore, dietary yeast increased somatic Wolbachia titer overall, though not in the central nervous system. These findings highlight the interactions between Wolbachia and germline cells as strongly nutrient-sensitive, and implicate conserved host signaling pathways by which nutrients influence Wolbachia titer.
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Affiliation(s)
- Laura R. Serbus
- Department of Biological Sciences, Florida International University Modesto A. Maidique Campus, Miami, Florida, United States of America
- Biomolecular Sciences Institute, Florida International University Modesto A. Maidique Campus, Miami, Florida, United States of America
| | - Pamela M. White
- Molecular, Cell, and Developmental Biology, University of California Santa Cruz, Santa Cruz, California, United States of America
| | - Jessica Pintado Silva
- Department of Biological Sciences, Florida International University Modesto A. Maidique Campus, Miami, Florida, United States of America
- Biomolecular Sciences Institute, Florida International University Modesto A. Maidique Campus, Miami, Florida, United States of America
| | - Amanda Rabe
- Molecular, Cell, and Developmental Biology, University of California Santa Cruz, Santa Cruz, California, United States of America
| | | | - Roger Albertson
- Biology Department, Albion College, Albion, Michigan, United States of America
| | - William Sullivan
- Molecular, Cell, and Developmental Biology, University of California Santa Cruz, Santa Cruz, California, United States of America
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42
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Van Hove I, Verslegers M, Hu TT, Carden M, Arckens L, Moons L. A proteomic approach to understand MMP-3-driven developmental processes in the postnatal cerebellum: Chaperonin CCT6A and MAP kinase as contributing factors. Dev Neurobiol 2015; 75:1033-48. [DOI: 10.1002/dneu.22272] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2014] [Revised: 01/16/2015] [Accepted: 01/16/2015] [Indexed: 02/06/2023]
Affiliation(s)
- Inge Van Hove
- Laboratory of Neural Circuit Development and Regeneration, Animal Physiology and Neurobiology Section; Department of Biology; KU Leuven Leuven Belgium
| | - Mieke Verslegers
- Laboratory of Neural Circuit Development and Regeneration, Animal Physiology and Neurobiology Section; Department of Biology; KU Leuven Leuven Belgium
| | - Tjing-Tjing Hu
- Laboratory of Neuroplasticity and Neuroproteomics, Animal Physiology and Neurobiology Section; Department of Biology; KU Leuven Leuven Belgium
| | - Martin Carden
- School of Biosciences, University of Kent; Canterbury CT2 7NJ United Kingdom
| | - Lutgarde Arckens
- Laboratory of Neuroplasticity and Neuroproteomics, Animal Physiology and Neurobiology Section; Department of Biology; KU Leuven Leuven Belgium
| | - Lieve Moons
- Laboratory of Neural Circuit Development and Regeneration, Animal Physiology and Neurobiology Section; Department of Biology; KU Leuven Leuven Belgium
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Miyata Y, Shibata T, Aoshima M, Tsubata T, Nishida E. The molecular chaperone TRiC/CCT binds to the Trp-Asp 40 (WD40) repeat protein WDR68 and promotes its folding, protein kinase DYRK1A binding, and nuclear accumulation. J Biol Chem 2014; 289:33320-32. [PMID: 25342745 PMCID: PMC4246089 DOI: 10.1074/jbc.m114.586115] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2014] [Revised: 10/18/2014] [Indexed: 11/06/2022] Open
Abstract
Trp-Asp (WD) repeat protein 68 (WDR68) is an evolutionarily conserved WD40 repeat protein that binds to several proteins, including dual specificity tyrosine phosphorylation-regulated protein kinase (DYRK1A), MAPK/ERK kinase kinase 1 (MEKK1), and Cullin4-damage-specific DNA-binding protein 1 (CUL4-DDB1). WDR68 affects multiple and diverse physiological functions, such as controlling anthocyanin synthesis in plants, tissue growth in insects, and craniofacial development in vertebrates. However, the biochemical basis and the regulatory mechanism of WDR68 activity remain largely unknown. To better understand the cellular function of WDR68, here we have isolated and identified cellular WDR68 binding partners using a phosphoproteomic approach. More than 200 cellular proteins with wide varieties of biochemical functions were identified as WDR68-binding protein candidates. Eight T-complex protein 1 (TCP1) subunits comprising the molecular chaperone TCP1 ring complex/chaperonin-containing TCP1 (TRiC/CCT) were identified as major WDR68-binding proteins, and phosphorylation sites in both WDR68 and TRiC/CCT were identified. Co-immunoprecipitation experiments confirmed the binding between TRiC/CCT and WDR68. Computer-aided structural analysis suggested that WDR68 forms a seven-bladed β-propeller ring. Experiments with a series of deletion mutants in combination with the structural modeling showed that three of the seven β-propeller blades of WDR68 are essential and sufficient for TRiC/CCT binding. Knockdown of cellular TRiC/CCT by siRNA caused an abnormal WDR68 structure and led to reduction of its DYRK1A-binding activity. Concomitantly, nuclear accumulation of WDR68 was suppressed by the knockdown of TRiC/CCT, and WDR68 formed cellular aggregates when overexpressed in the TRiC/CCT-deficient cells. Altogether, our results demonstrate that the molecular chaperone TRiC/CCT is essential for correct protein folding, DYRK1A binding, and nuclear accumulation of WDR68.
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Affiliation(s)
- Yoshihiko Miyata
- From the Department of Cell and Developmental Biology, Graduate School of Biostudies, Kyoto University, Kitashirakawa Oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan and
| | | | | | | | - Eisuke Nishida
- From the Department of Cell and Developmental Biology, Graduate School of Biostudies, Kyoto University, Kitashirakawa Oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan and
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44
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Kato E, Orisaka M, Kurokawa T, Chino Y, Fujita Y, Shinagawa A, Yoshida Y. Relation between outcomes and expression of estrogen receptor-α phosphorylated at Ser(167) in endometrioid endometrial cancer. Cancer Sci 2014; 105:1307-12. [PMID: 25154549 PMCID: PMC4462347 DOI: 10.1111/cas.12491] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2014] [Revised: 07/10/2014] [Accepted: 07/23/2014] [Indexed: 11/30/2022] Open
Abstract
Both ligand-dependent and ligand-independent activation of estrogen receptor (ER)α is modulated by receptor phosphorylation and results in activation of the ERα-dependent pathways that are involved in endometrioid endometrial cancer (EEC) pathogenesis. It is also known that the mammalian target of rapamycin (mTOR)/p70 S6 kinase 1 (S6K1) and MAPK/p90 ribosomal S6 kinase (RSK) signaling pathways coordinately regulate phosphorylated-ERα at Ser167 (p-Ser167-ERα). However, the expression of p-Ser167-ERα in EEC and its prognostic role in ECC is largely unexplored. The purpose of the present study was to investigate the expression of p-Ser167-ERα in ECC and its relationship with prognosis. Immunohistochemical staining of primary EEC surgical specimens (n = 103) was carried out using antibodies specific for p-Ser167-ERα and for p-mTOR/p-S6K1 and p-MAPK/p-RSK. The correlation of p-Ser167-ERα expression with clinicopathological features and survival of ECC was studied. Patients that were positive for nuclear p-Ser167-ERα had significantly shorter relapse-free survival, and although the result was not significant, levels of nuclear p-Ser167-ERα tended to be higher in advanced-stage ECC patients. Nuclear p-Ser167-ERα was significantly positively correlated with p-MAPK and p-S6K1, and with significantly shorter relapse-free survival in EEC.
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Affiliation(s)
- Eiichi Kato
- Department of Obstetrics and Gynecology, Faculty of Medical Sciences, University of Fukui, Fukui, Japan
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45
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Sergeeva OA, Tran MT, Haase-Pettingell C, King JA. Biochemical characterization of mutants in chaperonin proteins CCT4 and CCT5 associated with hereditary sensory neuropathy. J Biol Chem 2014; 289:27470-80. [PMID: 25124038 DOI: 10.1074/jbc.m114.576033] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Hereditary sensory neuropathies are a class of disorders marked by degeneration of the nerve fibers in the sensory periphery neurons. Recently, two mutations were identified in the subunits of the eukaryotic cytosolic chaperonin TRiC, a protein machine responsible for folding actin and tubulin in the cell. C450Y CCT4 was identified in a stock of Sprague-Dawley rats, whereas H147R CCT5 was found in a human Moroccan family. As with many genetically identified mutations associated with neuropathies, the underlying molecular basis of the mutants was not defined. We investigated the biochemical properties of these mutants using an expression system in Escherichia coli that produces homo-oligomeric rings of CCT4 and CCT5. Full-length versions of both mutant protein chains were expressed in E. coli at levels approaching that of the WT chains. Sucrose gradient centrifugation revealed chaperonin-sized complexes of both WT and mutant chaperonins, but with reduced recovery of C450Y CCT4 soluble subunits. Electron microscopy of negatively stained samples of C450Y CCT4 revealed few ring-shaped species, whereas WT CCT4, H147R CCT5, and WT CCT5 revealed similar ring structures. CCT5 complexes were assayed for their ability to suppress aggregation of and refold the model substrate γd-crystallin, suppress aggregation of mutant huntingtin, and refold the physiological substrate β-actin in vitro. H147R CCT5 was not as efficient in chaperoning these substrates as WT CCT5. The subtle effects of these mutations are consistent with the homozygous disease phenotype, in which most functions are carried out during development and adulthood, but some selective function is lost or reduced.
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Affiliation(s)
- Oksana A Sergeeva
- From the Department of Biology, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
| | - Meme T Tran
- From the Department of Biology, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
| | - Cameron Haase-Pettingell
- From the Department of Biology, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
| | - Jonathan A King
- From the Department of Biology, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
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Ma D, Cui L, Gao J, Yan W, Liu Y, Xu S, Wu B. Proteomic analysis of mesenchymal stem cells from normal and deep carious dental pulp. PLoS One 2014; 9:e97026. [PMID: 24809979 PMCID: PMC4014579 DOI: 10.1371/journal.pone.0097026] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2014] [Accepted: 04/14/2014] [Indexed: 12/19/2022] Open
Abstract
Dental pulp stem cells (DPSCs), precursor cells of odontoblasts, are ideal seed cells for tooth tissue engineering and regeneration. Our previous study has demonstrated that stem cells exist in dental pulp with deep caries and are called carious dental pulp stem cells (CDPSCs). The results indicated that CDPSCs had a higher proliferative and stronger osteogenic differentiation potential than DPSCs. However, the molecular mechanisms responsible for the biological differences between DPSCs and CDPSCs are poorly understood. The aim of this study was to define the molecular features of DPSCs and CDPSCs by comparing the proteomic profiles using two-dimensional fluorescence difference gel electrophoresis (2-D DIGE) in combination with matrix-assisted laser desorption ionization time-of-flight mass spectrometry (MALDI-TOF MS). Our results revealed that there were 18 protein spots differentially expressed between DPSCs and CDPSCs in a narrow pH range of 4 to 7. These differently expressed proteins are mostly involved in the regulation of cell proliferation, differentiation, cell cytoskeleton and motility. In addition, our results suggested that CDPSCs had a higher expression of antioxidative proteins that might protect CDPSCs from oxidative stress. This study explores some potential proteins responsible for the biological differences between DPSCs and CDPSCs and expands our understanding on the molecular mechanisms of mineralization of DPSCs in the formation of the dentin-pulp complex.
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Affiliation(s)
- Dandan Ma
- Department of Stomatology, Nanfang Hospital, Guangzhou, P.R. China
- College of Stomatology, Southern Medical University, Guangzhou, P.R. China
| | - Li Cui
- Department of Stomatology, Nanfang Hospital, Guangzhou, P.R. China
- College of Stomatology, Southern Medical University, Guangzhou, P.R. China
| | - Jie Gao
- Department of Stomatology, Nanfang Hospital, Guangzhou, P.R. China
- College of Stomatology, Southern Medical University, Guangzhou, P.R. China
| | - Wenjuan Yan
- Department of Stomatology, Nanfang Hospital, Guangzhou, P.R. China
- College of Stomatology, Southern Medical University, Guangzhou, P.R. China
| | - Ying Liu
- Department of Stomatology, Nanfang Hospital, Guangzhou, P.R. China
- College of Stomatology, Southern Medical University, Guangzhou, P.R. China
| | - Shuaimei Xu
- Department of Stomatology, Nanfang Hospital, Guangzhou, P.R. China
- College of Stomatology, Southern Medical University, Guangzhou, P.R. China
| | - Buling Wu
- Department of Stomatology, Nanfang Hospital, Guangzhou, P.R. China
- College of Stomatology, Southern Medical University, Guangzhou, P.R. China
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The chaperonin CCT interacts with and mediates the correct folding and activity of three subunits of translation initiation factor eIF3: b, i and h. Biochem J 2014; 458:213-24. [PMID: 24320561 DOI: 10.1042/bj20130979] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
eIF3 (eukaryotic initiation factor 3) is the largest and most complex eukaryotic mRNA translation factor in terms of the number of protein components or subunits. In mammals, eIF3 is composed of 13 different polypeptide subunits, of which five, i.e. a, b, c, g and i, are conserved and essential in vivo from yeasts to mammals. In the present study, we show that the eukaryotic cytosolic chaperonin CCT [chaperonin containing TCP-1 (tailless complex polypeptide 1)] binds to newly synthesized eIF3b and promotes the correct folding of eIF3h and eIF3i. Interestingly, overexpression of these last two subunits is associated with enhanced translation of specific mRNAs over and above the general enhancement of global translation. In agreement with this, our data show that, as CCT is required for the correct folding of eIF3h and eIF3i subunits, it indirectly influences gene expression with eIF3i overexpression enhancing both cap- and IRES (internal ribosome entry segment)-dependent translation initiation, whereas eIF3h overexpression selectively increases IRES-dependent translation initiation. Importantly, these studies demonstrate the requirement of the chaperonin machinery for the correct folding of essential components of the translational machinery and provide further evidence of the close interplay between the cell environment, cell signalling, cell proliferation, the chaperone machinery and translational apparatus.
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Pende M, Treins C. Ribosomal Protein S6 and S6 Kinases. TRANSLATION AND ITS REGULATION IN CANCER BIOLOGY AND MEDICINE 2014:345-362. [DOI: 10.1007/978-94-017-9078-9_16] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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Garrocho-Villegas V, Aguilar C R, Sánchez de Jiménez E. Insights into the TOR-S6K signaling pathway in maize (Zea mays L.). pathway activation by effector-receptor interaction. Biochemistry 2013; 52:9129-40. [PMID: 24358933 DOI: 10.1021/bi401474x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The primordial TOR pathway, known to control growth and cell proliferation, has still not been fully described for plants. Nevertheless, in maize, an insulin-like growth factor (ZmIGF) peptide has been reported to stimulate this pathway. This research provides further insight into the TOR pathway in maize, using a biochemical approach in cultures of fast-growing (FG) and slow-growing (SG) calli, as a model system. Our results revealed that addition of either ZmIGF or insulin to SG calli stimulated DNA synthesis and increased the growth rate through cell proliferation and increased the rate of ribosomal protein (RP) synthesis by the selective mobilization of RP mRNAs into polysomes. Furthermore, analysis of the phosphorylation status of the main TOR and S6K kinases from the TOR pathway revealed stimulation by ZmIGF or insulin, whereas rapamycin inhibited its activation. Remarkably, a putative maize insulin-like receptor was recognized by a human insulin receptor antibody, as demonstrated by immunoprecipitation from membrane protein extracts of maize callus. Furthermore, competition experiments between ZmIGF and insulin for the receptor site on maize protoplasts suggested structural recognition of the putative receptor by either effector. These data were confirmed by confocal immunolocalization within the cell membrane of callus cells. Taken together, these data indicate that cell growth and cell proliferation in maize depend on the activation of the TOR-S6K pathway through the interaction of an insulin-like growth factor and its receptor. This evidence suggests that higher plants as well as metazoans have conserved this biochemical pathway to regulate their growth, supporting the conclusion that it is a highly evolved conserved pathway.
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50
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Garavello NM, Pena DA, Bonatto JMC, Duarte ML, Costa-Junior HM, Schumacher RI, Forti FL, Schechtman D. Activation of protein kinase C delta by ψδRACK peptide promotes embryonic stem cell proliferation through ERK 1/2. J Proteomics 2013; 94:497-512. [DOI: 10.1016/j.jprot.2013.10.021] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2013] [Revised: 09/30/2013] [Accepted: 10/15/2013] [Indexed: 01/07/2023]
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