1
|
Mahboubi H, Yu H, Malca M, McCusty D, Stochaj U. Pifithrin-µ Induces Stress Granule Formation, Regulates Cell Survival, and Rewires Cellular Signaling. Cells 2024; 13:885. [PMID: 38891018 PMCID: PMC11172192 DOI: 10.3390/cells13110885] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Revised: 04/30/2024] [Accepted: 05/15/2024] [Indexed: 06/20/2024] Open
Abstract
(1) Background: Stress granules (SGs) are cytoplasmic protein-RNA condensates that assemble in response to various insults. SG production is driven by signaling pathways that are relevant to human disease. Compounds that modulate SG characteristics are therefore of clinical interest. Pifithrin-µ is a candidate anti-tumor agent that inhibits members of the hsp70 chaperone family. While hsp70s are required for granulostasis, the impact of pifithrin-µ on SG formation is unknown. (2) Methods: Using HeLa cells as model system, cell-based assays evaluated the effects of pifithrin-µ on cell viability. Quantitative Western blotting assessed cell signaling events and SG proteins. Confocal microscopy combined with quantitative image analyses examined multiple SG parameters. (3) Results: Pifithrin-µ induced bona fide SGs in the absence of exogenous stress. These SGs were dynamic; their properties were determined by the duration of pifithrin-µ treatment. The phosphorylation of eIF2α was mandatory to generate SGs upon pifithrin-µ exposure. Moreover, the formation of pifithrin-µ SGs was accompanied by profound changes in cell signaling. Pifithrin-µ reduced the activation of 5'-AMP-activated protein kinase, whereas the pro-survival protein kinase Akt was activated. Long-term pifithrin-µ treatment caused a marked loss of cell viability. (4) Conclusions: Our study identified stress-related changes in cellular homeostasis that are elicited by pifithrin-µ. These insights are important knowledge for the appropriate therapeutic use of pifithrin-µ and related compounds.
Collapse
Affiliation(s)
- Hicham Mahboubi
- Department of Physiology, McGill University, Montreal, QC H3G 1Y6, Canada (H.Y.); (M.M.)
| | - Henry Yu
- Department of Physiology, McGill University, Montreal, QC H3G 1Y6, Canada (H.Y.); (M.M.)
| | - Michael Malca
- Department of Physiology, McGill University, Montreal, QC H3G 1Y6, Canada (H.Y.); (M.M.)
| | - David McCusty
- Department of Physiology, McGill University, Montreal, QC H3G 1Y6, Canada (H.Y.); (M.M.)
| | - Ursula Stochaj
- Department of Physiology, McGill University, Montreal, QC H3G 1Y6, Canada (H.Y.); (M.M.)
- Quantitative Life Sciences Program, McGill University, Montreal, QC H3G 1Y6, Canada
| |
Collapse
|
2
|
Shen M, Cao S, Long X, Xiao L, Yang L, Zhang P, Li L, Chen F, Lei T, Gao H, Ye F, Bu H. DNAJC12 causes breast cancer chemotherapy resistance by repressing doxorubicin-induced ferroptosis and apoptosis via activation of AKT. Redox Biol 2024; 70:103035. [PMID: 38306757 PMCID: PMC10847378 DOI: 10.1016/j.redox.2024.103035] [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: 12/10/2023] [Revised: 01/03/2024] [Accepted: 01/07/2024] [Indexed: 02/04/2024] Open
Abstract
BACKGROUND Chemotherapy is a primary treatment for breast cancer (BC), yet many patients develop resistance over time. This study aims to identify critical factors contributing to chemoresistance and their underlying molecular mechanisms, with a focus on reversing this resistance. METHODS We utilized samples from the Gene Expression Omnibus (GEO) and West China Hospital to identify and validate genes associated with chemoresistance. Functional studies were conducted using MDA-MB-231 and MCF-7 cell lines, involving gain-of-function and loss-of-function approaches. RNA sequencing (RNA-seq) identified potential mechanisms. We examined interactions between DNAJC12, HSP70, and AKT using co-immunoprecipitation (Co-IP) assays and established cell line-derived xenograft (CDX) models for in vivo validations. RESULTS Boruta analysis of four GEO datasets identified DNAJC12 as highly significant. Patients with high DNAJC12 expression showed an 8 % pathological complete response (pCR) rate, compared to 38 % in the low expression group. DNAJC12 inhibited doxorubicin (DOX)-induced cell death through both ferroptosis and apoptosis. Combining apoptosis and ferroptosis inhibitors completely reversed DOX resistance caused by DNAJC12 overexpression. RNA-seq suggested that DNAJC12 overexpression activated the PI3K-AKT pathway. Inhibition of AKT reversed the DOX resistance induced by DNAJC12, including reduced apoptosis and ferroptosis, restoration of cleaved caspase 3, and decreased GPX4 and SLC7A11 levels. Additionally, DNAJC12 was found to increase AKT phosphorylation in an HSP70-dependent manner, and inhibiting HSP70 also reversed the DOX resistance. In vivo studies confirmed that AKT inhibition reversed DNAJC12-induced DOX resistance in the CDX model. CONCLUSION DNAJC12 expression is closely linked to chemoresistance in BC. The DNAJC12-HSP70-AKT signaling axis is crucial in mediating resistance to chemotherapy by suppressing DOX-induced ferroptosis and apoptosis. Our findings suggest that targeting AKT and HSP70 activities may offer new therapeutic strategies to overcome chemoresistance in BC.
Collapse
Affiliation(s)
- Mengjia Shen
- Department of Pathology, West China Hospital, Sichuan University, No. 37, Guo Xue Xiang, Chengdu, 610041, Sichuan, China; Institute of Clinical Pathology, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, China
| | - Shiyu Cao
- Institute of Clinical Pathology, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, China
| | - Xinyi Long
- Institute of Clinical Pathology, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, China
| | - Lin Xiao
- Institute of Clinical Pathology, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, China
| | - Libo Yang
- Department of Pathology, West China Hospital, Sichuan University, No. 37, Guo Xue Xiang, Chengdu, 610041, Sichuan, China; Institute of Clinical Pathology, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, China
| | - Peichuan Zhang
- Institute of Thoracic Oncology and Department of Thoracic Surgery, West China Hospital, Sichuan University, Chengdu, China
| | - Li Li
- Institute of Clinical Pathology, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, China
| | - Fei Chen
- Institute of Clinical Pathology, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, China
| | - Ting Lei
- Department of Pathology, The Third Affiliated Hospital of Soochow University, Changzhou, Jiangsu 213003, China
| | - Hongwei Gao
- Laboratory Medicine Center, Lanzhou University Second Hospital, The Second Clinical Medical College of Lanzhou University, Lanzhou 730000, China
| | - Feng Ye
- Institute of Clinical Pathology, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, China; Key Lab of Transplant Engineering and Immunology, Ministry of Health, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, China.
| | - Hong Bu
- Department of Pathology, West China Hospital, Sichuan University, No. 37, Guo Xue Xiang, Chengdu, 610041, Sichuan, China; Institute of Clinical Pathology, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, China; Key Lab of Transplant Engineering and Immunology, Ministry of Health, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, China.
| |
Collapse
|
3
|
Bracho-Valdés I, Cervantes-Villagrana RD, Beltrán-Navarro YM, Olguín-Olguín A, Escobar-Islas E, Carretero-Ortega J, Olivares-Reyes JA, Reyes-Cruz G, Gutkind JS, Vázquez-Prado J. Akt Is Controlled by Bag5 through a Monoubiquitination to Polyubiquitination Switch. Int J Mol Sci 2023; 24:17531. [PMID: 38139359 PMCID: PMC10743781 DOI: 10.3390/ijms242417531] [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: 11/22/2023] [Revised: 12/13/2023] [Accepted: 12/14/2023] [Indexed: 12/24/2023] Open
Abstract
The serine-threonine kinase Akt plays a fundamental role in cell survival, metabolism, proliferation, and migration. To keep these essential processes under control, Akt activity and stability must be tightly regulated; otherwise, life-threatening conditions might prevail. Although it is well understood that phosphorylation regulates Akt activity, much remains to be known about how its stability is maintained. Here, we characterize BAG5, a chaperone regulator, as a novel Akt-interactor and substrate that attenuates Akt stability together with Hsp70. BAG5 switches monoubiquitination to polyubiquitination of Akt and increases its degradation caused by Hsp90 inhibition and Hsp70 overexpression. Akt interacts with BAG5 at the linker region that joins the first and second BAG domains and phosphorylates the first BAG domain. The Akt-BAG5 complex is formed in serum-starved conditions and dissociates in response to HGF, coincident with BAG5 phosphorylation. BAG5 knockdown attenuated Akt degradation and facilitated its activation, whereas the opposite effect was caused by BAG5 overexpression. Altogether, our results indicate that Akt stability and signaling are dynamically regulated by BAG5, depending on growth factor availability.
Collapse
Affiliation(s)
- Ismael Bracho-Valdés
- Department of Pharmacology, Cinvestav-IPN. Av. Instituto Politécnico Nacional 2508, Col. San Pedro Zacatenco, Mexico City 07360, Mexico; (I.B.-V.)
- Academic Department of Apparatus and Systems I, Deanship of Health Sciences, Universidad Autónoma de Guadalajara, Av. Patria 1201, Zapopan 45129, Mexico
| | - Rodolfo Daniel Cervantes-Villagrana
- Department of Pharmacology, Cinvestav-IPN. Av. Instituto Politécnico Nacional 2508, Col. San Pedro Zacatenco, Mexico City 07360, Mexico; (I.B.-V.)
- Department of Pharmacology, Moores Cancer Center, School of Medicine, University of California San Diego, La Jolla, San Diego, CA 92093, USA
| | - Yarely Mabell Beltrán-Navarro
- Department of Pharmacology, Cinvestav-IPN. Av. Instituto Politécnico Nacional 2508, Col. San Pedro Zacatenco, Mexico City 07360, Mexico; (I.B.-V.)
| | - Adán Olguín-Olguín
- Department of Pharmacology, Cinvestav-IPN. Av. Instituto Politécnico Nacional 2508, Col. San Pedro Zacatenco, Mexico City 07360, Mexico; (I.B.-V.)
| | - Estanislao Escobar-Islas
- Department of Pharmacology, Cinvestav-IPN. Av. Instituto Politécnico Nacional 2508, Col. San Pedro Zacatenco, Mexico City 07360, Mexico; (I.B.-V.)
| | - Jorge Carretero-Ortega
- Department of Pharmacology, Cinvestav-IPN. Av. Instituto Politécnico Nacional 2508, Col. San Pedro Zacatenco, Mexico City 07360, Mexico; (I.B.-V.)
| | - J. Alberto Olivares-Reyes
- Department of Biochemistry, Cinvestav-IPN. Av. Instituto Politécnico Nacional 2508, Col. San Pedro Zacatenco, Mexico City 07360, Mexico
| | - Guadalupe Reyes-Cruz
- Department of Cell Biology, Cinvestav-IPN. Av. Instituto Politécnico Nacional 2508, Col. San Pedro Zacatenco, Mexico City 07360, Mexico
| | - J. Silvio Gutkind
- Department of Pharmacology, Moores Cancer Center, School of Medicine, University of California San Diego, La Jolla, San Diego, CA 92093, USA
| | - José Vázquez-Prado
- Department of Pharmacology, Cinvestav-IPN. Av. Instituto Politécnico Nacional 2508, Col. San Pedro Zacatenco, Mexico City 07360, Mexico; (I.B.-V.)
| |
Collapse
|
4
|
Sha G, Jiang Z, Zhang W, Jiang C, Wang D, Tang D. The multifunction of HSP70 in cancer: Guardian or traitor to the survival of tumor cells and the next potential therapeutic target. Int Immunopharmacol 2023; 122:110492. [PMID: 37390645 DOI: 10.1016/j.intimp.2023.110492] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Revised: 05/22/2023] [Accepted: 06/09/2023] [Indexed: 07/02/2023]
Abstract
Heat shock protein 70 (HSP70) is a highly conserved protein composed of nucleotide-binding domains (NBD) and C-terminal substrate binding domain (SBD) that can function as a "molecular chaperone". HSP70 was discovered to directly or indirectly play a regulatory role in both internal and external apoptosis pathways. Studies have shown that HSP70 can not only promote tumor progression, enhance tumor cell resistance and inhibit anticancer effects but also induce an anticancer response by activating immune cells. In addition, chemotherapy, radiotherapy and immunotherapy for cancer may be affected by HSP70, which has shown promising potential as an anticancer drug. In this review, we summarized the molecular structure and mechanism of HSP70 and discussed the dual effects of HSP70 on tumor cells and the possibility and potential methods of using HSP70 as a target to treat cancer.
Collapse
Affiliation(s)
- Gengyu Sha
- Clinical Medical College, Yangzhou University, Yangzhou, Jiangsu Province 225000, China.
| | - Zhengting Jiang
- Clinical Medical College, Yangzhou University, Yangzhou, Jiangsu Province 225000, China.
| | - Wenjie Zhang
- Clinical Medical College, Yangzhou University, Yangzhou, Jiangsu Province 225000, China.
| | - Chuwen Jiang
- Clinical Medical College, Yangzhou University, Yangzhou, Jiangsu Province 225000, China.
| | - Daorong Wang
- Department of General Surgery, Institute of General Surgery, Clinical Medical College, Yangzhou University, Northern Jiangsu People's Hospital, Yangzhou 225000, China.
| | - Dong Tang
- Department of General Surgery, Institute of General Surgery, Clinical Medical College, Yangzhou University, Northern Jiangsu People's Hospital, Yangzhou 225000, China.
| |
Collapse
|
5
|
Mitra S, Dash R, Munni YA, Selsi NJ, Akter N, Uddin MN, Mazumder K, Moon IS. Natural Products Targeting Hsp90 for a Concurrent Strategy in Glioblastoma and Neurodegeneration. Metabolites 2022; 12:1153. [PMID: 36422293 PMCID: PMC9697676 DOI: 10.3390/metabo12111153] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Revised: 11/16/2022] [Accepted: 11/16/2022] [Indexed: 09/16/2023] Open
Abstract
Glioblastoma multiforme (GBM) is one of the most common aggressive, resistant, and invasive primary brain tumors that share neurodegenerative actions, resembling many neurodegenerative diseases. Although multiple conventional approaches, including chemoradiation, are more frequent in GBM therapy, these approaches are ineffective in extending the mean survival rate and are associated with various side effects, including neurodegeneration. This review proposes an alternative strategy for managing GBM and neurodegeneration by targeting heat shock protein 90 (Hsp90). Hsp90 is a well-known molecular chaperone that plays essential roles in maintaining and stabilizing protein folding to degradation in protein homeostasis and modulates signaling in cancer and neurodegeneration by regulating many client protein substrates. The therapeutic benefits of Hsp90 inhibition are well-known for several malignancies, and recent evidence highlights that Hsp90 inhibitors potentially inhibit the aggressiveness of GBM, increasing the sensitivity of conventional treatment and providing neuroprotection in various neurodegenerative diseases. Herein, the overview of Hsp90 modulation in GBM and neurodegeneration progress has been discussed with a summary of recent outcomes on Hsp90 inhibition in various GBM models and neurodegeneration. Particular emphasis is also given to natural Hsp90 inhibitors that have been evidenced to show dual protection in both GBM and neurodegeneration.
Collapse
Affiliation(s)
- Sarmistha Mitra
- Department of Anatomy, Dongguk University College of Medicine, Gyeongju 38066, Republic of Korea
| | - Raju Dash
- Department of Anatomy, Dongguk University College of Medicine, Gyeongju 38066, Republic of Korea
| | - Yeasmin Akter Munni
- Department of Anatomy, Dongguk University College of Medicine, Gyeongju 38066, Republic of Korea
| | - Nusrat Jahan Selsi
- Product Development Department, Popular Pharmaceuticals Ltd., Dhaka 1207, Bangladesh
| | - Nasrin Akter
- Department of Clinical Pharmacy and Molecular Pharmacology, East West University Bangladesh, Dhaka 1212, Bangladesh
| | - Md Nazim Uddin
- Department of Pharmacy, Southern University Bangladesh, Chittagong 4000, Bangladesh
| | - Kishor Mazumder
- Department of Pharmacy, Jashore University of Science and Technology, Jashore 7408, Bangladesh
- School of Optometry and Vision Science, UNSW Medicine, University of New South Wales (UNSW), Sydney, NSW 2052, Australia
| | - Il Soo Moon
- Department of Anatomy, Dongguk University College of Medicine, Gyeongju 38066, Republic of Korea
| |
Collapse
|
6
|
Cytoplasmic proteotoxicity regulates HRI-dependent phosphorylation of eIF2α via the Hsp70-Bag3 module. iScience 2022; 25:104282. [PMID: 35573186 PMCID: PMC9097715 DOI: 10.1016/j.isci.2022.104282] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Revised: 02/27/2022] [Accepted: 04/19/2022] [Indexed: 11/30/2022] Open
Abstract
The major heat shock protein Hsp70 forms a complex with a scaffold protein Bag3 that links it to components of signaling pathways. Via these interactions, the Hsp70-Bag3 module functions as a proteotoxicity sensor that controls cell signaling. Here, to search for pathways regulated by the complex, we utilized JG-98, an allosteric inhibitor of Hsp70 that blocks its interaction with Bag3. RNAseq followed by the pathway analysis indicated that several signaling pathways including UPR were activated by JG-98. Surprisingly, only the eIF2α-associated branch of the UPR was activated, while other UPR branches were not induced, suggesting that the response was unrelated to the ER proteotoxicity and ER-associated kinase PERK1. Indeed, induction of the UPR genes under these conditions was driven by a distinct eIF2α kinase HRI. Hsp70-Bag3 directly interacted with HRI and regulated eIF2α phosphorylation upon cytoplasmic proteotoxicity. Therefore, cytosolic proteotoxicity can activate certain UPR genes via Hsp70-Bag3-HRI-eIF2α axis. Disruption of Hsp70-Bag3 module activates the unfolded protein response (UPR) This induction of UPR genes is mediated by HRI-dependent phosphorylation of eIF2α Hsp70-Bag3 “monitors” cytoplasmic proteotoxicity to activate the HRI-eIF2α axis eIF2α integrates proteotoxicity signals from ER and cytoplasm
Collapse
|
7
|
Han Z, McAlpine SR, Chapman R. Delivering hydrophilic peptide inhibitors of heat shock protein 70 into cancer cells. Bioorg Chem 2022; 122:105713. [DOI: 10.1016/j.bioorg.2022.105713] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2021] [Revised: 02/24/2022] [Accepted: 02/27/2022] [Indexed: 11/02/2022]
|
8
|
Ambrose AJ, Chapman E. Function, Therapeutic Potential, and Inhibition of Hsp70 Chaperones. J Med Chem 2021; 64:7060-7082. [PMID: 34009983 DOI: 10.1021/acs.jmedchem.0c02091] [Citation(s) in RCA: 42] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Hsp70s are among the most highly conserved proteins in all of biology. Through an iterative binding and release of exposed hydrophobic residues on client proteins, Hsp70s can prevent aggregation and promote folding to the native state of their client proteins. The human proteome contains eight canonical Hsp70s. Because Hsp70s are relatively promiscuous they play a role in folding a large proportion of the proteome. Hsp70s are implicated in disease through their ability to regulate protein homeostasis. In recent years, researchers have attempted to develop selective inhibitors of Hsp70 isoforms to better understand the role of individual isoforms in biology and as potential therapeutics. Selective inhibitors have come from rational design, forced localization, and serendipity, but the development of completely selective inhibitors remains elusive. In the present review, we discuss the Hsp70 structure and function, the known Hsp70 client proteins, the role of Hsp70s in disease, and current efforts to discover Hsp70 modulators.
Collapse
Affiliation(s)
- Andrew J Ambrose
- Department of Pharmacology and Toxicology, College of Pharmacy, University of Arizona, 1703 East Mabel Street, Tucson, Arizona 85721, United States
| | - Eli Chapman
- Department of Pharmacology and Toxicology, College of Pharmacy, University of Arizona, 1703 East Mabel Street, Tucson, Arizona 85721, United States
| |
Collapse
|
9
|
Eyermann CE, Haley JD, Alexandrova EM. The HSP-RTK-Akt axis mediates acquired resistance to Ganetespib in HER2-positive breast cancer. Cell Death Dis 2021; 12:126. [PMID: 33500390 PMCID: PMC7838268 DOI: 10.1038/s41419-021-03414-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Revised: 12/22/2020] [Accepted: 01/05/2021] [Indexed: 02/06/2023]
Abstract
Breast cancer is the leading cause of cancer-related death in women worldwide. Human epidermal growth factor receptor 2 (HER2)-positive subtype comprises 20% of sporadic breast cancers and is an aggressive disease. While targeted therapies have greatly improved its management, primary and acquired resistance remain a major roadblock to making it a curable malignancy. Ganetespib, an Hsp90 (Heat shock protein 90) small molecule inhibitor, shows preferential efficacy in HER2-positive breast cancer, including therapy-refractory cases, and has an excellent safety profile in ongoing clinical trials (38 in total, six on breast cancer). However, Ganetespib itself evokes acquired resistance, which is a significant obstacle to its clinical advancement. Here, we show that Ganetespib potently, albeit temporarily, suppresses HER2-positive breast cancer in genetic mouse models, but the animals eventually succumb via acquired resistance. We found that Ganetespib-resistant tumors upregulate several compensatory HSPs, as well as a wide network of phospho-activated receptor tyrosine kinases (RTKs), many of which are HSP clients. Downstream of p-RTKs, the MAPK pathway remains suppressed in the resistant tumors, as is HER2 itself. In contrast, the p-RTK effector Akt is stabilized and phospho-activated. Notably, pharmacological inhibition of Akt significantly delays acquired Ganetespib resistance, by 50%. These data establish Akt as a unifying actionable node downstream of the broadly upregulated HSP/p-RTK resistance program and suggests that Akt co-targeting with Ganetespib may be a superior therapeutic strategy in the clinic.
Collapse
Affiliation(s)
| | - John D Haley
- Department of Pathology, Stony Brook University, Stony Brook, NY, 11794-8691, USA
| | | |
Collapse
|
10
|
Chaudhury S, Keegan BM, Blagg BSJ. The role and therapeutic potential of Hsp90, Hsp70, and smaller heat shock proteins in peripheral and central neuropathies. Med Res Rev 2021; 41:202-222. [PMID: 32844464 PMCID: PMC8485878 DOI: 10.1002/med.21729] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2020] [Revised: 08/11/2020] [Accepted: 08/12/2020] [Indexed: 12/16/2022]
Abstract
Heat shock proteins (Hsps) are molecular chaperones that also play important roles in the activation of the heat shock response (HSR). The HSR is an evolutionary conserved and protective mechanism that is used to counter abnormal physiological conditions, stressors, and disease states, such as those exemplified in cancer and/or neurodegeneration. In normal cells, heat shock factor-1 (HSF-1), the transcription factor that regulates the HSR, remains in a dormant multiprotein complex that is formed upon association with chaperones (Hsp90, Hsp70, etc.), co-chaperones, and client proteins. However, under cellular stress, HSF-1 dissociates from Hsp90 and induces the transcriptional upregulation of Hsp70 to afford protection against the encountered cellular stress. As a consequence of both peripheral and central neuropathies, cellular stress occurs and results in the accumulation of unfolded and/or misfolded proteins, which can be counterbalanced by activation of the HSR. Since Hsp90 is the primary regulator of the HSR, modulation of Hsp90 by small molecules represents an attractive therapeutic approach against both peripheral and central neuropathies.
Collapse
Affiliation(s)
- Subhabrata Chaudhury
- Department of Chemistry and Biochemistry, Warren Family Research Center for Drug Discovery and Development, University of Notre Dame, Notre Dame, Indiana, USA
| | - Bradley M Keegan
- Department of Chemistry and Biochemistry, Warren Family Research Center for Drug Discovery and Development, University of Notre Dame, Notre Dame, Indiana, USA
| | - Brian S J Blagg
- Department of Chemistry and Biochemistry, Warren Family Research Center for Drug Discovery and Development, University of Notre Dame, Notre Dame, Indiana, USA
| |
Collapse
|
11
|
He X, Lin Z, Ning J, Li N, Cui X, Zhao B, Hong F, Miao J. Promoting TTC4 and HSP70 interaction and translocation of annexin A7 to lysosome inhibits apoptosis in vascular endothelial cells. FASEB J 2020; 34:12932-12945. [PMID: 33000523 DOI: 10.1096/fj.202000067r] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2020] [Revised: 07/12/2020] [Accepted: 07/21/2020] [Indexed: 01/16/2023]
Abstract
We previously demonstrated that Tetraticopeptide 4 (TTC4) inhibited apoptosis in vascular endothelial cells (VEC) deprived of serum and fibroblast growth factor 2 (FGF-2). In this study, we aimed to resolve the mechanism of TTC4 inhibiting VEC apoptosis. TTC4, predicted as a HSP70 co-chaperone protein, may regulate the fate of cells by affecting the activity of HSP70, however, there is no experimental evidence showing the interaction of TTC4 and HSP70. Using Co-immunoprecipitation (Co-IP), we demonstrated that TTC4 interacted with HSP70. If HSP70 was knockdown, TTC4 no longer suppressed apoptosis. Furthermore, we found ABO, an inhibitor of annexin A7 (ANXA7) GTPase, could promote the interaction of TTC4 and HSP70 and the translocation of ANXA7 to lysosome. At the same time, ABO inhibited the interaction of HSP70 and ANXA7. Moreover, Akt, as a downstream effector of HSP70 was upregulated, and ANXA7 translocating to lysosome protected the stability of lysosomal membrane. Here, we discovered a special mechanism by which TTC4 inhibited apoptosis via HSP70 in VECs. On the one hand, increasing TTC4 and HSP70 interaction upregulated Akt that inhibited apoptosis. On the other hand, decreasing HSP70 and ANXA7 interaction promoted the translocation of ANXA7 to lysosome, which inhibited apoptosis through protecting the lysosomal membrane stability.
Collapse
Affiliation(s)
- Xiaoying He
- Shandong Provincial Key Laboratory of Animal Cells and Developmental Biology, School of Life Science, Shandong University, Qingdao, P.R. China
| | - Zhaomin Lin
- Institute of Medical Science, The Second Hospital of Shandong University, Jinan, P.R. China
| | - Junya Ning
- Shandong Provincial Key Laboratory of Animal Cells and Developmental Biology, School of Life Science, Shandong University, Qingdao, P.R. China
| | - Na Li
- Shandong Provincial Key Laboratory of Animal Cells and Developmental Biology, School of Life Science, Shandong University, Qingdao, P.R. China
| | - Xiaoling Cui
- Shandong Provincial Key Laboratory of Animal Cells and Developmental Biology, School of Life Science, Shandong University, Qingdao, P.R. China
| | - Baoxiang Zhao
- Institute of Organic Chemistry, School of Chemistry and Chemical Engineering, Shandong University, Jinan, P.R. China
| | - Fanzhen Hong
- Department of Obstetrics, The Second Hospital of Shandong University, Jinan, P.R. China
| | - Junying Miao
- Shandong Provincial Key Laboratory of Animal Cells and Developmental Biology, School of Life Science, Shandong University, Qingdao, P.R. China.,The Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education and Chinese Ministry of Health, Shandong University Qilu Hospital, Jinan, P.R. China
| |
Collapse
|
12
|
Xu XY, Du Y, Liu X, Ren Y, Dong Y, Xu HY, Shi JS, Jiang D, Xu X, Li L, Xu ZH, Geng Y. Targeting Follistatin like 1 ameliorates liver fibrosis induced by carbon tetrachloride through TGF-β1-miR29a in mice. Cell Commun Signal 2020; 18:151. [PMID: 32933544 PMCID: PMC7493388 DOI: 10.1186/s12964-020-00610-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Accepted: 06/08/2020] [Indexed: 12/11/2022] Open
Abstract
Background Hepatic fibrosis is a pathological response of the liver to a variety of chronic stimuli. Hepatic stellate cells (HSCs) are the major source of myofibroblasts in the liver. Follistatin like 1 (Fstl1) is a secreted glycoprotein induced by transforming growth factor-β1 (TGF-β1). However, the precise functions and regulation mechanisms of Fstl1 in liver fibrogenesis remains unclear. Methods Hepatic stellate cell (HSC) line LX-2 stimulated by TGF-β1, primary culture of mouse HSCs and a model of liver fibrosis induced by CCl4 in mice was used to assess the effect of Fstl1 in vitro and in vivo. Results Here, we found that Fstl1 was significantly up regulated in human and mouse fibrotic livers, as well as activated HSCs. Haplodeficiency of Fstl1 or blockage of Fstl1 with a neutralizing antibody 22B6 attenuated CCl4-induced liver fibrosis in vivo. Fstl1 modulates TGF-β1 classic Samd2 and non-classic JNK signaling pathways. Knockdown of Fstl1 in HSCs significantly ameliorated cell activation, cell migration, chemokines C-C Motif Chemokine Ligand 2 (CCL2) and C-X-C Motif Chemokine Ligand 8 (CXCL8) secretion and extracellular matrix (ECM) production, and also modulated microRNA-29a (miR29a) expression. Furthermore, we identified that Fstl1 was a target gene of miR29a. And TGF-β1 induction of Fstl1 expression was partially through down regulation of miR29a in HSCs. Conclusions Our data suggests TGF-β1-miR29a-Fstl1 regulatory circuit plays a key role in regulation the HSC activation and ECM production, and targeting Fstl1 may be a strategy for the treatment of liver fibrosis. Video Abstract
Graphical abstract ![]()
Collapse
Affiliation(s)
- Xin-Yi Xu
- School of Pharmaceutical Sciences, Jiangnan University, Wuxi, 214122, China.,National Engineering Laboratory for Cereal Fermentation Technology, Jiangnan University, Wuxi, Jiangsu, China.,Jiangsu Engineering Research Center for Bioactive Products Processing Technology, Jiangnan University, Wuxi, 214122, P.R. China
| | - Yan Du
- School of Pharmaceutical Sciences, Jiangnan University, Wuxi, 214122, China
| | - Xue Liu
- State Key Laboratory of Medicinal Chemical Biology, College of Life Sciences, Nankai University, Tianjin, 300071, China.,Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, CA, 90048, USA
| | - Yilin Ren
- School of Pharmaceutical Sciences, Jiangnan University, Wuxi, 214122, China
| | - Yingying Dong
- Cambridge-Suda Genomic Resource Center, Soochow University, Suzhou, 215123, China
| | - Hong-Yu Xu
- National Engineering Laboratory for Cereal Fermentation Technology, Jiangnan University, Wuxi, Jiangsu, China.,Jiangsu Engineering Research Center for Bioactive Products Processing Technology, Jiangnan University, Wuxi, 214122, P.R. China
| | - Jin-Song Shi
- School of Pharmaceutical Sciences, Jiangnan University, Wuxi, 214122, China
| | - Dianhua Jiang
- Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, CA, 90048, USA
| | - Xin Xu
- Wuxi No. 2 People's Hospital, Wuxi, 214002, China
| | - Lian Li
- State Key Laboratory of Medicinal Chemical Biology, College of Life Sciences, Nankai University, Tianjin, 300071, China
| | - Zheng-Hong Xu
- National Engineering Laboratory for Cereal Fermentation Technology, Jiangnan University, Wuxi, Jiangsu, China.,Jiangsu Engineering Research Center for Bioactive Products Processing Technology, Jiangnan University, Wuxi, 214122, P.R. China
| | - Yan Geng
- School of Pharmaceutical Sciences, Jiangnan University, Wuxi, 214122, China.
| |
Collapse
|
13
|
Jafari A, Rezaei-Tavirani M, Farhadihosseinabadi B, Taranejoo S, Zali H. HSP90 and Co-chaperones: Impact on Tumor Progression and Prospects for Molecular-Targeted Cancer Therapy. Cancer Invest 2020; 38:310-328. [PMID: 32274949 DOI: 10.1080/07357907.2020.1752227] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Heat shock protein 90 (HSP90), a highly and unique chaperone, presents as a double-edged sword. It plays an essential role in many physiological and pathological processes, including tumor development. The current review highlights a recent understanding of the roles of HSP90 in molecular mechanisms underlying cancer survival and progression. HSP90 and its client proteins through the regulation of oncoproteins including signaling proteins, receptors, and transcriptional factors involved in tumorigenesis. It also has potential clinical application as diagnostic and prognostic biomarkers for assessing cancer progression. In this way, using HSP90 to develop new anticancer therapeutic agents including HSP90 inhibitors, anti-HSP90 antibody, and HSP90-based vaccines has been promising.
Collapse
Affiliation(s)
- Ameneh Jafari
- Student Research Committee, Shahid Beheshti University of Medical Sciences, Tehran, Iran.,Proteomics Research Center, School of Allied Medical Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mostafa Rezaei-Tavirani
- Proteomics Research Center, School of Allied Medical Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | | | - Shahrouz Taranejoo
- Wellman Centre for Photomedicine, Harvard-MIT Division of Health Sciences and Technology (HST), Boston, MA, USA
| | - Hakimeh Zali
- Department of Tissue engineering and applied cell, School of Advanced Technologies in Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| |
Collapse
|
14
|
Albakova Z, Armeev GA, Kanevskiy LM, Kovalenko EI, Sapozhnikov AM. HSP70 Multi-Functionality in Cancer. Cells 2020; 9:cells9030587. [PMID: 32121660 PMCID: PMC7140411 DOI: 10.3390/cells9030587] [Citation(s) in RCA: 117] [Impact Index Per Article: 29.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Revised: 02/20/2020] [Accepted: 02/28/2020] [Indexed: 12/20/2022] Open
Abstract
The 70-kDa heat shock proteins (HSP70s) are abundantly present in cancer, providing malignant cells selective advantage by suppressing multiple apoptotic pathways, regulating necrosis, bypassing cellular senescence program, interfering with tumor immunity, promoting angiogenesis and supporting metastasis. This direct involvement of HSP70 in most of the cancer hallmarks explains the phenomenon of cancer "addiction" to HSP70, tightly linking tumor survival and growth to the HSP70 expression. HSP70 operates in different states through its catalytic cycle, suggesting that it can multi-function in malignant cells in any of these states. Clinically, tumor cells intensively release HSP70 in extracellular microenvironment, resulting in diverse outcomes for patient survival. Given its clinical significance, small molecule inhibitors were developed to target different sites of the HSP70 machinery. Furthermore, several HSP70-based immunotherapy approaches were assessed in clinical trials. This review will explore different roles of HSP70 on cancer progression and emphasize the importance of understanding the flexibility of HSP70 nature for future development of anti-cancer therapies.
Collapse
Affiliation(s)
- Zarema Albakova
- Department of Biology, Lomonosov Moscow State University, 119192 Moscow, Russia; (G.A.A.); (A.M.S.)
- Department of Immunology, Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry of the Russian Academy of Sciences, 117997 Moscow, Russia; (L.M.K.); (E.I.K.)
- Correspondence:
| | - Grigoriy A. Armeev
- Department of Biology, Lomonosov Moscow State University, 119192 Moscow, Russia; (G.A.A.); (A.M.S.)
| | - Leonid M. Kanevskiy
- Department of Immunology, Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry of the Russian Academy of Sciences, 117997 Moscow, Russia; (L.M.K.); (E.I.K.)
| | - Elena I. Kovalenko
- Department of Immunology, Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry of the Russian Academy of Sciences, 117997 Moscow, Russia; (L.M.K.); (E.I.K.)
| | - Alexander M. Sapozhnikov
- Department of Biology, Lomonosov Moscow State University, 119192 Moscow, Russia; (G.A.A.); (A.M.S.)
- Department of Immunology, Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry of the Russian Academy of Sciences, 117997 Moscow, Russia; (L.M.K.); (E.I.K.)
| |
Collapse
|
15
|
Yen CC, Chen LT, Li CF, Chen SC, Chua WY, Lin YC, Yen CH, Chen YC, Yang MH, Chao Y, Fletcher JA. Identification of phenothiazine as an ETV1‑targeting agent in gastrointestinal stromal tumors using the Connectivity Map. Int J Oncol 2019; 55:536-546. [PMID: 31268158 DOI: 10.3892/ijo.2019.4829] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Accepted: 06/12/2019] [Indexed: 11/06/2022] Open
Abstract
Gastrointestinal stromal tumors (GISTs) are gastrointestinal tract sarcomas that commonly contain a mutation in the tyrosine kinases, KIT and platelet‑derived growth factor receptor A (PDGFRA). Imatinib, sunitinib and regorafenib are all effective tyrosine kinase inhibitors; however, acquired resistance is inevitable. The E26 variant 1 (ETV1) pathway has been found to be a key downstream effector of KIT and is therefore a reasonable therapeutic target for this disease. In this study, we explored the potential agents targeting ETV1 in GISTs by uploading an ETV1 knockout gene signature of GIST cell lines to the pattern‑matching software 'Connectivity Map'. The activity and mechanisms of identified agents were examined using an in vitro model. Four drugs were identified: Suberanilohydroxamic acid and trichostatin [two histone deacetylase inhibitors (HDACIs)] and trifluoperazine and thioridazine (two phenothiazine‑class drugs). Western blot analysis demonstrated that all four drugs had ETV1‑downregulating effects. As HDACIs have been previously studied in GISTs, we focused on phenothiazine. Phenothiazine was found to exert cytotoxicity and to induce apoptosis and autophagy in GISTs. Treatment with phenothiazine had little effect on the KIT/AKT/mammalian target of rapamycin (mTOR) pathway, but instead upregulated extracellular‑signal‑regulated kinase (ERK) activity. A combination of phenothiazine and a MEK inhibitor had a synergistic cytotoxic effect on GISTs. Western blot analysis indicated that ELK1 and early growth response 1 (EGR1) were activated/upregulated following phenothiazine treatment, and the MEK inhibitor/phenothiazine combination downregulated the ERK/ELK1/EGR1 pathway, resulting in diminished autophagy, as well as enhanced apoptosis. On the whole, the findings of this study established phenothiazine as a novel class of therapeutic agents in GIST treatment and demonstrate that a combination of phenothiazine and MEK inhibitor has great potential for use in the treatment of GISTs.
Collapse
Affiliation(s)
- Chueh-Chuan Yen
- Division of Medical Oncology, Center for Immuno‑oncology, Department of Oncology, Taipei Veterans General Hospital, Taipei 11217, Taiwan, R.O.C
| | - Li-Tzong Chen
- National Institute of Cancer Research, National Health Research Institutes, Tainan 70456, Taiwan, R.O.C
| | - Chien-Feng Li
- Department of Pathology, Chi‑Mei Medical Center, Tainan 71004, Taiwan, R.O.C
| | - San-Chi Chen
- Division of Medical Oncology, Center for Immuno‑oncology, Department of Oncology, Taipei Veterans General Hospital, Taipei 11217, Taiwan, R.O.C
| | - Wei-Yang Chua
- Division of Medical Oncology, Center for Immuno‑oncology, Department of Oncology, Taipei Veterans General Hospital, Taipei 11217, Taiwan, R.O.C
| | - Yung-Chan Lin
- Division of Medical Oncology, Center for Immuno‑oncology, Department of Oncology, Taipei Veterans General Hospital, Taipei 11217, Taiwan, R.O.C
| | - Chiao-Han Yen
- Division of Medical Oncology, Center for Immuno‑oncology, Department of Oncology, Taipei Veterans General Hospital, Taipei 11217, Taiwan, R.O.C
| | - Yen-Chun Chen
- Division of Medical Oncology, Center for Immuno‑oncology, Department of Oncology, Taipei Veterans General Hospital, Taipei 11217, Taiwan, R.O.C
| | - Muh-Hwa Yang
- Division of Medical Oncology, Center for Immuno‑oncology, Department of Oncology, Taipei Veterans General Hospital, Taipei 11217, Taiwan, R.O.C
| | - Yee Chao
- Division of Medical Oncology, Center for Immuno‑oncology, Department of Oncology, Taipei Veterans General Hospital, Taipei 11217, Taiwan, R.O.C
| | - Jonathan A Fletcher
- Department of Pathology, Brigham and Women's Hospital, Boston, MA 02115, USA
| |
Collapse
|
16
|
Gestwicki JE, Shao H. Inhibitors and chemical probes for molecular chaperone networks. J Biol Chem 2018; 294:2151-2161. [PMID: 30213856 DOI: 10.1074/jbc.tm118.002813] [Citation(s) in RCA: 69] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
The molecular chaperones are central mediators of protein homeostasis. In that role, they engage in widespread protein-protein interactions (PPIs) with each other and with their "client" proteins. Together, these PPIs form the backbone of a network that ensures proper vigilance over the processes of protein folding, trafficking, quality control, and degradation. The core chaperones, such as the heat shock proteins Hsp60, Hsp70, and Hsp90, are widely expressed in most tissues, yet there is growing evidence that the PPIs among them may be re-wired in disease conditions. This possibility suggests that these PPIs, and perhaps not the individual chaperones themselves, could be compelling drug targets. Indeed, recent efforts have yielded small molecules that inhibit (or promote) a subset of inter-chaperone PPIs. These chemical probes are being used to study chaperone networks in a range of models, and the successes with these approaches have inspired a community-wide objective to produce inhibitors for a broader set of targets. In this Review, we discuss progress toward that goal and point out some of the challenges ahead.
Collapse
Affiliation(s)
- Jason E Gestwicki
- From the Department of Pharmaceutical Chemistry and the Institute for Neurodegenerative Disease, University of California San Francisco, San Francisco, California 94158
| | - Hao Shao
- From the Department of Pharmaceutical Chemistry and the Institute for Neurodegenerative Disease, University of California San Francisco, San Francisco, California 94158
| |
Collapse
|
17
|
Quan Wang J, Di Yang M, Chen X, Wang Y, Zeng Chen L, Cheng X, Hua Liu X. Discovery of new chromen-4-one derivatives as telomerase inhibitors through regulating expression of dyskerin. J Enzyme Inhib Med Chem 2018; 33:1199-1211. [PMID: 30132373 PMCID: PMC6104605 DOI: 10.1080/14756366.2018.1466881] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
A series of new trimethoxyphenyl-4H-chromen derivatives as telomerase inhibitors through regulation dyskerin were designed and synthesised. The anticancer activity assay in vitro showed that compound 5i 3-(4-(4-isonicotinoylpiperazin-1-yl)butoxy)-5,7-dimethoxy-2-(3,4,5-trimethoxyphenyl)-4H-chromen-4-one exhibited high activity against Hela, SMMC-7721, SGC-7901, U87 and HepG2 cell lines. Compound 5i also showed potent inhibitory activity against telomerase. The further results confirmed this title compound could significantly improve pathological changes induced rat hepatic tumor in vivo. Preliminary mechanisms showed that compound 5i inhibited telomerase activity through decrease expression of dyskerin.
Collapse
Affiliation(s)
- Jie Quan Wang
- a School of Pharmacy, Anhui Province Key Laboratory of Major Autoimmune Diseases , Anhui Institute of Innovative Drugs, Anhui Medical University , Hefei , P. R. China
| | - Meng Di Yang
- a School of Pharmacy, Anhui Province Key Laboratory of Major Autoimmune Diseases , Anhui Institute of Innovative Drugs, Anhui Medical University , Hefei , P. R. China
| | - Xing Chen
- a School of Pharmacy, Anhui Province Key Laboratory of Major Autoimmune Diseases , Anhui Institute of Innovative Drugs, Anhui Medical University , Hefei , P. R. China
| | - Yang Wang
- a School of Pharmacy, Anhui Province Key Laboratory of Major Autoimmune Diseases , Anhui Institute of Innovative Drugs, Anhui Medical University , Hefei , P. R. China
| | - Liu Zeng Chen
- a School of Pharmacy, Anhui Province Key Laboratory of Major Autoimmune Diseases , Anhui Institute of Innovative Drugs, Anhui Medical University , Hefei , P. R. China
| | - Xiu Cheng
- a School of Pharmacy, Anhui Province Key Laboratory of Major Autoimmune Diseases , Anhui Institute of Innovative Drugs, Anhui Medical University , Hefei , P. R. China
| | - Xin Hua Liu
- a School of Pharmacy, Anhui Province Key Laboratory of Major Autoimmune Diseases , Anhui Institute of Innovative Drugs, Anhui Medical University , Hefei , P. R. China.,b School of Material Science Chemical Engineering , ChuZhou University , ChuZhou , P. R. China
| |
Collapse
|
18
|
Peksel B, Gombos I, Péter M, Vigh L, Tiszlavicz Á, Brameshuber M, Balogh G, Schütz GJ, Horváth I, Vigh L, Török Z. Mild heat induces a distinct "eustress" response in Chinese Hamster Ovary cells but does not induce heat shock protein synthesis. Sci Rep 2017; 7:15643. [PMID: 29142280 PMCID: PMC5688065 DOI: 10.1038/s41598-017-15821-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2017] [Accepted: 11/02/2017] [Indexed: 11/16/2022] Open
Abstract
The current research on cellular heat stress management focuses on the roles of heat shock proteins (HSPs) and the proteostasis network under severe stress conditions. The mild, fever-type stress and the maintenance of membrane homeostasis are less well understood. Herein, we characterized the acute effect of mild, fever-range heat shock on membrane organization, and HSP synthesis and localization in two mammalian cell lines, to delineate the role of membranes in the sensing and adaptation to heat. A multidisciplinary approach combining ultrasensitive fluorescence microscopy and lipidomics revealed the molecular details of novel cellular “eustress”, when cells adapt to mild heat by maintaining membrane homeostasis, activating lipid remodeling, and redistributing chaperone proteins. Notably, this leads to acquired thermotolerance in the complete absence of the induction of HSPs. At higher temperatures, additional defense mechanisms are activated, including elevated expression of molecular chaperones, contributing to an extended stress memory and acquired thermotolerance.
Collapse
Affiliation(s)
- Begüm Peksel
- Institute of Biochemistry, Biological Research Centre of the Hungarian Academy of Sciences, Szeged, H-6726, Hungary
| | - Imre Gombos
- Institute of Biochemistry, Biological Research Centre of the Hungarian Academy of Sciences, Szeged, H-6726, Hungary
| | - Mária Péter
- Institute of Biochemistry, Biological Research Centre of the Hungarian Academy of Sciences, Szeged, H-6726, Hungary
| | - László Vigh
- Institute of Biochemistry, Biological Research Centre of the Hungarian Academy of Sciences, Szeged, H-6726, Hungary
| | - Ádám Tiszlavicz
- Institute of Biochemistry, Biological Research Centre of the Hungarian Academy of Sciences, Szeged, H-6726, Hungary
| | - Mario Brameshuber
- Institute of Applied Physics - Biophysics, TU Wien, 1040, Vienna, Austria
| | - Gábor Balogh
- Institute of Biochemistry, Biological Research Centre of the Hungarian Academy of Sciences, Szeged, H-6726, Hungary
| | - Gerhard J Schütz
- Institute of Applied Physics - Biophysics, TU Wien, 1040, Vienna, Austria
| | - Ibolya Horváth
- Institute of Biochemistry, Biological Research Centre of the Hungarian Academy of Sciences, Szeged, H-6726, Hungary
| | - László Vigh
- Institute of Biochemistry, Biological Research Centre of the Hungarian Academy of Sciences, Szeged, H-6726, Hungary
| | - Zsolt Török
- Institute of Biochemistry, Biological Research Centre of the Hungarian Academy of Sciences, Szeged, H-6726, Hungary.
| |
Collapse
|
19
|
Kawaguchi Y, Taoka M, Takekiyo T, Uekita T, Shoji I, Hachiya N, Ichimura T. TRIM32-Cytoplasmic-Body Formation Is an ATP-Consuming Process Stimulated by HSP70 in Cells. PLoS One 2017; 12:e0169436. [PMID: 28052117 PMCID: PMC5215751 DOI: 10.1371/journal.pone.0169436] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2016] [Accepted: 12/05/2016] [Indexed: 12/19/2022] Open
Abstract
The spontaneous and energy-releasing reaction of protein aggregation is typically prevented by cellular quality control machinery (QC). TRIM32 is a member of the TRIM (tripartite motif-containing) ubiquitin E3 ligases, and when overexpressed in cultured cells, readily forms spherical inclusions designated as cytoplasmic bodies (CBs) even without proteasome inhibition. Here, we show that HSP70, a central QC component, is a primary binding factor of overexpressed TRIM32. Contrary to expectation, however, we find that this molecular chaperone facilitates and stabilizes CB assembly depending on intrinsic ATPase activity, rather than preventing CB formation. We also show that the HSP70-TRIM32 complex is biochemically distinct from the previously characterized 14-3-3-TRIM32 phospho-complex. Moreover, the two complexes have opposing roles, with HSP70 stimulating CB formation and 14-3-3 retaining TRIM32 in a diffuse form throughout the cytosol. Our results suggest that CB inclusion formation is actively controlled by cellular QC and requires ATP, similar to protein folding and degradation reactions.
Collapse
Affiliation(s)
- Yuki Kawaguchi
- Department of Applied Chemistry, National Defense Academy, Yokosuka, Kanagawa, Japan
| | - Masato Taoka
- Department of Chemistry, Tokyo Metropolitan University, Hachioji, Tokyo, Japan
| | - Takahiro Takekiyo
- Department of Applied Chemistry, National Defense Academy, Yokosuka, Kanagawa, Japan
| | - Takamasa Uekita
- Department of Applied Chemistry, National Defense Academy, Yokosuka, Kanagawa, Japan
| | - Ikuo Shoji
- Division of Infectious Disease Control, Center for Infectious Diseases, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Naomi Hachiya
- Biotechnology Group, R&D Division, Tokyo Metropolitan Industrial Technology Research Institute, Koto-ku, Tokyo, Japan
| | - Tohru Ichimura
- Department of Applied Chemistry, National Defense Academy, Yokosuka, Kanagawa, Japan
- * E-mail:
| |
Collapse
|
20
|
Garcia DM, Dietrich D, Clardy J, Jarosz DF. A common bacterial metabolite elicits prion-based bypass of glucose repression. eLife 2016; 5. [PMID: 27906649 PMCID: PMC5132342 DOI: 10.7554/elife.17978] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2016] [Accepted: 10/08/2016] [Indexed: 12/25/2022] Open
Abstract
Robust preference for fermentative glucose metabolism has motivated domestication of the budding yeast Saccharomyces cerevisiae. This program can be circumvented by a protein-based genetic element, the [GAR+] prion, permitting simultaneous metabolism of glucose and other carbon sources. Diverse bacteria can elicit yeast cells to acquire [GAR+], although the molecular details of this interaction remain unknown. Here we identify the common bacterial metabolite lactic acid as a strong [GAR+] inducer. Transient exposure to lactic acid caused yeast cells to heritably circumvent glucose repression. This trait had the defining genetic properties of [GAR+], and did not require utilization of lactic acid as a carbon source. Lactic acid also induced [GAR+]-like epigenetic states in fungi that diverged from S. cerevisiae ~200 million years ago, and in which glucose repression evolved independently. To our knowledge, this is the first study to uncover a bacterial metabolite with the capacity to potently induce a prion. DOI:http://dx.doi.org/10.7554/eLife.17978.001 We communicate with each other using speech, writing and physical gestures. But how do bacteria, yeast and other single-celled microbes communicate? In 2014, researchers reported a new example of communication between bacteria and yeast in which the bacteria send a chemical message that has a very long-lasting effect on how the yeast grow in certain environments. This in turn also affected the ability of the bacteria to survive in these environments. The identity of the chemical message produced by the bacteria, however, was not known. Garcia, Dietrich et al. – including one of the researchers from the previous study – used biochemical and genetic approaches to identify the chemical message. The experiments show that the message is a molecule called lactic acid, which is very common in nature and is produced by many bacteria. Garcia, Dietrich et al. found out how much lactic acid is needed to alter the growth of brewer’s yeast, and which genes in yeast are involved in responding to the message from the bacteria. Further experiments suggest that the ability of yeast and bacteria to communicate using lactic acid is likely to have existed for hundreds of millions of years. The next step following this work will be to identify other chemical messages used by microbes. The human body is packed with billions of bacterial cells, and in some cases yeast can also take up residence. A future challenge will be to find out if bacteria and yeast inside the human body are able to communicate with each other in ways that could affect our health. DOI:http://dx.doi.org/10.7554/eLife.17978.002
Collapse
Affiliation(s)
- David M Garcia
- Department of Chemical and Systems Biology, Stanford University School of Medicine, Stanford, United States
| | - David Dietrich
- Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, United States
| | - Jon Clardy
- Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, United States
| | - Daniel F Jarosz
- Department of Chemical and Systems Biology, Stanford University School of Medicine, Stanford, United States.,Department of Developmental Biology, Stanford University School of Medicine, Stanford, United States
| |
Collapse
|
21
|
Abstract
The chaperome constitutes a broad family of molecular chaperones and co-chaperones that facilitate the folding, refolding, and degradation of the proteome. Heat shock protein 90 (Hsp90) promotes the folding of numerous oncoproteins to aid survival of malignant phenotypes, and small molecule inhibitors of the Hsp90 chaperone complex offer a viable approach to treat certain cancers. One therapeutic attribute of this approach is the selectivity of these molecules to target high affinity oncogenic Hsp90 complexes present in tumor cells, which are absent in nontransformed cells. This selectivity has given rise to the idea that disease may contribute to forming a stress chaperome that is functionally distinct in its ability to interact with small molecule Hsp90 modulators. Consistent with this premise, modulating Hsp90 improves clinically relevant endpoints of diabetic peripheral neuropathy but has little impact in nondiabetic nerve. The concept of targeting the "diabetic chaperome" to treat diabetes and its complications is discussed.
Collapse
Affiliation(s)
- Rick T Dobrowsky
- Department of Pharmacology and Toxicology, The University of Kansas, 5064 Malott Hall 1251 Wescoe Hall Dr., Lawrence, KS, 66045, USA.
| |
Collapse
|
22
|
Radons J. The human HSP70 family of chaperones: where do we stand? Cell Stress Chaperones 2016; 21:379-404. [PMID: 26865365 PMCID: PMC4837186 DOI: 10.1007/s12192-016-0676-6] [Citation(s) in RCA: 365] [Impact Index Per Article: 45.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2015] [Revised: 01/29/2016] [Accepted: 01/29/2016] [Indexed: 01/23/2023] Open
Abstract
The 70-kDa heat shock protein (HSP70) family of molecular chaperones represents one of the most ubiquitous classes of chaperones and is highly conserved in all organisms. Members of the HSP70 family control all aspects of cellular proteostasis such as nascent protein chain folding, protein import into organelles, recovering of proteins from aggregation, and assembly of multi-protein complexes. These chaperones augment organismal survival and longevity in the face of proteotoxic stress by enhancing cell viability and facilitating protein damage repair. Extracellular HSP70s have a number of cytoprotective and immunomodulatory functions, the latter either in the context of facilitating the cross-presentation of immunogenic peptides via major histocompatibility complex (MHC) antigens or in the context of acting as "chaperokines" or stimulators of innate immune responses. Studies have linked the expression of HSP70s to several types of carcinoma, with Hsp70 expression being associated with therapeutic resistance, metastasis, and poor clinical outcome. In malignantly transformed cells, HSP70s protect cells from the proteotoxic stress associated with abnormally rapid proliferation, suppress cellular senescence, and confer resistance to stress-induced apoptosis including protection against cytostatic drugs and radiation therapy. All of the cellular activities of HSP70s depend on their adenosine-5'-triphosphate (ATP)-regulated ability to interact with exposed hydrophobic surfaces of proteins. ATP hydrolysis and adenosine diphosphate (ADP)/ATP exchange are key events for substrate binding and Hsp70 release during folding of nascent polypeptides. Several proteins that bind to distinct subdomains of Hsp70 and consequently modulate the activity of the chaperone have been identified as HSP70 co-chaperones. This review focuses on the regulation, function, and relevance of the molecular Hsp70 chaperone machinery to disease and its potential as a therapeutic target.
Collapse
Affiliation(s)
- Jürgen Radons
- Scientific Consulting International, Mühldorfer Str. 64, 84503, Altötting, Germany.
| |
Collapse
|
23
|
Sherman MY, Gabai VL. Hsp70 in cancer: back to the future. Oncogene 2015; 34:4153-61. [PMID: 25347739 PMCID: PMC4411196 DOI: 10.1038/onc.2014.349] [Citation(s) in RCA: 168] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2014] [Revised: 09/08/2014] [Accepted: 09/22/2014] [Indexed: 12/24/2022]
Abstract
Mechanistic studies from cell culture and animal models have revealed critical roles for the heat shock protein Hsp70 in cancer initiation and progression. Surprisingly, many effects of Hsp70 on cancer have not been related to its chaperone activity, but rather to its role(s) in regulating cell signaling. A major factor that directs Hsp70 signaling activity appears to be the co-chaperone Bag3. Here, we review these recent breakthroughs, and how these discoveries drive drug development efforts.
Collapse
Affiliation(s)
- Michael Y. Sherman
- Department of Biochemistry, Boston University School of Medicine, Boston, MA, 02118, Tel 617-638-5971, Fax 617-638-5339
| | - Vladimir L. Gabai
- Department of Biochemistry, Boston University School of Medicine, Boston, MA, 02118, Tel 617-638-5971, Fax 617-638-5339
| |
Collapse
|
24
|
Xue W, Song BA, Zhao HJ, Qi XB, Huang YJ, Liu XH. Novel myricetin derivatives: Design, synthesis and anticancer activity. Eur J Med Chem 2015; 97:155-63. [PMID: 25965778 DOI: 10.1016/j.ejmech.2015.04.063] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2015] [Revised: 04/28/2015] [Accepted: 04/29/2015] [Indexed: 10/23/2022]
Abstract
Telomere and telomerase were closely related to occurrence and development of some cancers. To enhance ability of myricetin moiety for inhibiting telomerase, we designed a series of novel myricetin derivatives based on reasonable analysis. The telomerase inhibition assay showed that compound 6d displayed the most potent inhibitory activity with IC50 value of 0.91 μM. The anticancer activity assay showed that 6d exhibited high activity against human breast cells MDA-MB-231. The docking simulation of compound 6d was performed to get the probable binding model, the results demonstrated that the furan ring inserted into the active site deeply and had hydrophobic interactions with residues of Phe 568, Pro 627, four methoxy groups had hydrophobic interactions with residues of Phe 568, Pro 627, Lys 902, Val 904 and Pro 929. Western blot results showed that expression of p65 and TERT protein was clearly down-regulated by compound 6d. These data support further studies for the rational design of more efficient p65 and TERT modulators.
Collapse
Affiliation(s)
- Wei Xue
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Guizhou University, Guiyang 55002, PR China
| | - Bao-An Song
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Guizhou University, Guiyang 55002, PR China.
| | - Hong Ju Zhao
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Guizhou University, Guiyang 55002, PR China
| | - Xing Bao Qi
- School of Pharmacy, Anhui Medical University, Hefei, 230032, PR China
| | - Yin Jiu Huang
- Department of Bioscience, Bengbu Medical College, Bengbu, 233030, PR China
| | - Xin Hua Liu
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Guizhou University, Guiyang 55002, PR China; School of Pharmacy, Anhui Medical University, Hefei, 230032, PR China.
| |
Collapse
|
25
|
Späth GF, Drini S, Rachidi N. A touch of Zen: post-translational regulation of the Leishmania stress response. Cell Microbiol 2015; 17:632-8. [PMID: 25801803 DOI: 10.1111/cmi.12440] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2015] [Revised: 03/06/2015] [Accepted: 03/17/2015] [Indexed: 12/20/2022]
Abstract
Across bacterial, archaeal and eukaryotic kingdoms, heat shock proteins (HSPs) are defined as a class of highly conserved chaperone proteins that are rapidly induced in response to temperature increase through dedicated heat shock transcription factors. While this transcriptional response governs cellular adaptation of fungal, plant and animal cells to thermic shock and other forms of stress, early-branching eukaryotes of the kinetoplastid order, including trypanosomatid parasites, lack classical mechanisms of transcriptional regulation and show largely constitutive expression of HSPs, thus raising important questions on the function of HSPs in the absence of stress and the regulation of their chaperone activity in response to environmental adversity. Understanding parasite-specific mechanisms of stress-response regulation is especially relevant for protozoan parasites of the genus Leishmania that are adapted for survival inside highly toxic phagolysosomes of host macrophages causing the various immuno-pathologies of leishmaniasis. Here we review recent advances on the function and regulation of chaperone activities in these kinetoplastid pathogens and propose a new model for stress-response regulation through a reciprocal regulatory relationship between stress kinases and chaperones that may be relevant for parasite-adaptive differentiation and infectivity.
Collapse
Affiliation(s)
- Gerald F Späth
- Institut Pasteur and Institut National de la Santé et de la Recherche Médicale U1210, Unité de Parasitologie Moléculaire et Signalisation, 25 rue du Dr Roux, Paris, 75015, France
| | | | | |
Collapse
|
26
|
Ko SK, Kim J, Na DC, Park S, Park SH, Hyun JY, Baek KH, Kim ND, Kim NK, Park YN, Song K, Shin I. A small molecule inhibitor of ATPase activity of HSP70 induces apoptosis and has antitumor activities. ACTA ACUST UNITED AC 2015; 22:391-403. [PMID: 25772468 DOI: 10.1016/j.chembiol.2015.02.004] [Citation(s) in RCA: 85] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2014] [Revised: 01/20/2015] [Accepted: 02/05/2015] [Indexed: 01/13/2023]
Abstract
The heat shock protein HSP70 plays antiapoptotic and oncogenic roles, and thus its inhibition has been recognized as a potential avenue for anticancer therapy. Here we describe the small molecule, apoptozole (Az), which inhibits the ATPase activity of HSP70 by binding to its ATPase domain and, as a result, induces an array of apoptotic phenotypes in cancer cells. Affinity chromatography provides evidence that Az binds HSP70 but not other types of heat shock proteins including HSP40, HSP60, and HSP90. We also demonstrate that Az induces cancer cell death via caspase-dependent apoptosis by disrupting the interaction of HSP70 with APAF-1. Animal studies indicate that Az treatment retards tumor growth in a xenograft mouse model without affecting mouse viability. These studies suggest that Az will aid the development of new cancer therapies and serve as a chemical probe to gain a better understanding of the diverse functions of HSP70.
Collapse
Affiliation(s)
- Sung-Kyun Ko
- Center for Biofunctional Molecules, Department of Chemistry, Yonsei University, Seoul 120-749, Korea
| | - Jiyeon Kim
- Department of Biochemistry, Yonsei University, Seoul 120-749, Korea
| | - Deuk Chae Na
- Department of Pathology, Yonsei University College of Medicine, Seoul 120-752, Korea
| | - Sookil Park
- Center for Biofunctional Molecules, Department of Chemistry, Yonsei University, Seoul 120-749, Korea
| | - Seong-Hyun Park
- Center for Biofunctional Molecules, Department of Chemistry, Yonsei University, Seoul 120-749, Korea
| | - Ji Young Hyun
- Center for Biofunctional Molecules, Department of Chemistry, Yonsei University, Seoul 120-749, Korea
| | - Kyung-Hwa Baek
- Center for Biofunctional Molecules, Department of Chemistry, Yonsei University, Seoul 120-749, Korea
| | - Nam Doo Kim
- New Drug Development Center, Daegu-Gyeongbuk Medical Innovation Foundation, Daegu 706-010, Korea
| | - Nak-Kyoon Kim
- Advanced Analysis Center, Korea Institute of Science and Technology, Seoul 136-791, Korea
| | - Young Nyun Park
- Department of Pathology, Yonsei University College of Medicine, Seoul 120-752, Korea
| | - Kiwon Song
- Department of Biochemistry, Yonsei University, Seoul 120-749, Korea
| | - Injae Shin
- Center for Biofunctional Molecules, Department of Chemistry, Yonsei University, Seoul 120-749, Korea.
| |
Collapse
|
27
|
Thirunavukarasu D, Shi H. An RNA aptamer specific to Hsp70-ATP conformation inhibits its ATPase activity independent of Hsp40. Nucleic Acid Ther 2015; 25:103-12. [PMID: 25654640 DOI: 10.1089/nat.2014.0510] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The highly conserved and ubiquitous molecular chaperone heat shock protein 70 (Hsp70) plays a critical role in protein homeostasis (proteostasis). Controlled by its ATPase activity, Hsp70 cycles between two conformations, Hsp70-ATP and Hsp70-ADP, to bind and release its substrate. Chemical tools with distinct modes of action, especially those capable of modulating the ATPase activity of Hsp70, are being actively sought after in the mechanistic dissection of this system. Here, we report a conformation-specific RNA aptamer that binds only to Hsp70-ATP but not to Hsp70-ADP. We have refined this aptamer and demonstrated its inhibitory effect on Hsp70's ATPase activity. We have also shown that this inhibitory effect on Hsp70 is independent of its interaction with the Hsp40 co-chaperone. As Hsp70 is increasingly being recognized as a drug target in a number of age related diseases such as neurodegenerative, protein misfolding diseases and cancer, this aptamer is potentially useful in therapeutic applications. Moreover, this work also demonstrates the feasibility of using aptamers to target ATPase activity as a general therapeutic strategy.
Collapse
Affiliation(s)
- Deepak Thirunavukarasu
- Department of Biological Sciences and the RNA Institute, University at Albany, State University of New York , Albany, New York
| | | |
Collapse
|
28
|
Manos-Turvey A, Brodsky JL, Wipf P. The Effect of Structure and Mechanism of the Hsp70 Chaperone on the Ability to Identify Chemical Modulators and Therapeutics. TOPICS IN MEDICINAL CHEMISTRY 2015. [DOI: 10.1007/7355_2015_90] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
|
29
|
Reikvam H, Brenner AK, Nepstad I, Sulen A, Bruserud Ø. Heat shock protein 70 – the next chaperone to target in the treatment of human acute myelogenous leukemia? Expert Opin Ther Targets 2014; 18:929-44. [DOI: 10.1517/14728222.2014.924925] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
|
30
|
Koriyama Y, Sugitani K, Ogai K, Kato S. Heat shock protein 70 induction by valproic acid delays photoreceptor cell death by N-methyl-N-nitrosourea in mice. J Neurochem 2014; 130:707-19. [PMID: 24773621 DOI: 10.1111/jnc.12750] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2014] [Revised: 04/18/2014] [Accepted: 04/28/2014] [Indexed: 12/28/2022]
Abstract
Retinal degenerative diseases (RDs) are a group of inherited diseases characterized by the loss of photoreceptor cells. Selective photoreceptor loss can be induced in mice by an intraperitoneal injection of N-methyl-N-nitrosourea (MNU) and, because of its selectivity, this model is widely used to study the mechanism of RDs. Although it is known that calcium-calpain activation and lipid peroxidation are involved in the initiation of cell death, the precise mechanisms of this process remain unknown. Heat shock protein 70 (HSP70) has been shown to function as a chaperone molecule to protect cells against environmental and physiological stresses. In this study, we investigated the role of HSP70 on photoreceptor cell death in mice. HSP70 induction by valproic acid, a histone deacetylase inhibitor, attenuated the photoreceptor cell death by MNU through inhibition of apoptotic caspase signals. Furthermore, HSP70 itself was rapidly and calpain-dependently cleaved after MNU treatment. Therefore, HSP70 induction by valproic acid was dually effective against MNU-induced photoreceptor cell loss as a result of its anti-apoptotic actions and its ability to prevent HSP70 degradation. These findings might help lead us to a better understanding of the pathogenic mechanism of RDs. Retinal degenerative diseases are characterized by the loss of photoreceptor cells. We proposed the following cascade for N-methyl-N-nitrosourea (MNU)-induced photoreceptor cell death: MNU gives rise to cleavage of heat shock protein 70 (HSP70); HSP70 induction by valproic acid (VPA) is dually effective against MNU-induced photoreceptor cell loss because of its anti-apoptotic actions and its ability to prevent HSP70 degradation. We hope that the present study heralds a new era in developing therapeutic tools against retinal degenerative diseases.
Collapse
Affiliation(s)
- Yoshiki Koriyama
- Department of Molecular Neurobiology, Graduate School of Medicine, Kanazawa University, Kanazawa, Japan; Graduate School and Faculty of Pharmaceutical Sciences, Suzuka University of Medical Science, Suzuka, Japan
| | | | | | | |
Collapse
|
31
|
Gutierrez A, Pan L, Groen RWJ, Baleydier F, Kentsis A, Marineau J, Grebliunaite R, Kozakewich E, Reed C, Pflumio F, Poglio S, Uzan B, Clemons P, VerPlank L, An F, Burbank J, Norton S, Tolliday N, Steen H, Weng AP, Yuan H, Bradner JE, Mitsiades C, Look AT, Aster JC. Phenothiazines induce PP2A-mediated apoptosis in T cell acute lymphoblastic leukemia. J Clin Invest 2014; 124:644-55. [PMID: 24401270 DOI: 10.1172/jci65093] [Citation(s) in RCA: 162] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2013] [Accepted: 10/30/2013] [Indexed: 12/15/2022] Open
Abstract
T cell acute lymphoblastic leukemia (T-ALL) is an aggressive cancer that is frequently associated with activating mutations in NOTCH1 and dysregulation of MYC. Here, we performed 2 complementary screens to identify FDA-approved drugs and drug-like small molecules with activity against T-ALL. We developed a zebrafish system to screen small molecules for toxic activity toward MYC-overexpressing thymocytes and used a human T-ALL cell line to screen for small molecules that synergize with Notch inhibitors. We identified the antipsychotic drug perphenazine in both screens due to its ability to induce apoptosis in fish, mouse, and human T-ALL cells. Using ligand-affinity chromatography coupled with mass spectrometry, we identified protein phosphatase 2A (PP2A) as a perphenazine target. T-ALL cell lines treated with perphenazine exhibited rapid dephosphorylation of multiple PP2A substrates and subsequent apoptosis. Moreover, shRNA knockdown of specific PP2A subunits attenuated perphenazine activity, indicating that PP2A mediates the drug's antileukemic activity. Finally, human T-ALLs treated with perphenazine exhibited suppressed cell growth and dephosphorylation of PP2A targets in vitro and in vivo. Our findings provide a mechanistic explanation for the recurring identification of phenothiazines as a class of drugs with anticancer effects. Furthermore, these data suggest that pharmacologic PP2A activation in T-ALL and other cancers driven by hyperphosphorylated PP2A substrates has therapeutic potential.
Collapse
|
32
|
Mutation in integrin-linked kinase (ILK(R211A)) and heat-shock protein 70 comprise a broadly cardioprotective complex. PLoS One 2013; 8:e77331. [PMID: 24260102 PMCID: PMC3832499 DOI: 10.1371/journal.pone.0077331] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2013] [Accepted: 08/31/2013] [Indexed: 12/14/2022] Open
Abstract
Rationale Integrin-linked kinase (ILK) has been proposed as a novel molecular target that has translational potential in diverse cardiac diseases, since its upregulation promotes a broadly cardioprotective phenotype. However, ILK has been implicated as both a cardioprotective and oncogenic target, which imposes therapeutic constraints that are generally relevant to the translational potential of many kinases. Objective To study the cardioprotective properties of the activation-resistant, non-oncogenic, mutation of ILK (ILKR211A) against experimental MI invivo and Doxorubicin induced apoptosis invitro and it’s relationships to stress induced heat shock proteins. Methods/Results The transgenic mouse heart over-expressing a point mutation in the ILK pleckstrin homology (PH) domain (TgR211A) exhibits a highly cardioprotective phenotype based on LAD-ligation-induced MI reduction invivo, and on protection against doxorubicin (DOX)-induced cardiomyocyte apoptosis when overexpressed in human induced pluripotent stem cell (iPS)-derived cardiomyocytes invitro. Intriguingly, the degree of cardioprotection seen with the ILKR211A mutation exceeded that with the ILKS343D mutation. Microarray and immunoprecipitation analyses revealed upregulation of expression levels and specific binding of ILKWT, ILKS343D and ILKR211A to both constitutively active heat-shock protein 70 (Hsc70) and inducible Hsp70 in response to MI, and to acute ILK overexpression in iPSC-cardiomyocytes. ILK-mediated cardioprotection was shown to depend upon Hsp70 ATPase activity. Conclusions These findings indicate that wild type ILK and the non-oncogenic ILKR211A mutation comprise a cardioprotective module with Hsp/c70. These results advance a novel target discovery theme in which kinase mutations can be safely engineered to enhance cardioprotective effects.
Collapse
|
33
|
Alix JH. Targeting HSP70 to Fight Cancer and Bad Bugs: One and the Same Battle? Antibiotics (Basel) 2013. [DOI: 10.1002/9783527659685.ch23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
|
34
|
Lum MA, Balaburski GM, Murphy ME, Black AR, Black JD. Heat shock proteins regulate activation-induced proteasomal degradation of the mature phosphorylated form of protein kinase C. J Biol Chem 2013; 288:27112-27127. [PMID: 23900841 DOI: 10.1074/jbc.m112.437095] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Although alterations in stimulus-induced degradation of PKC have been implicated in disease, mechanistic understanding of this process remains limited. Evidence supports the existence of both proteasomal and lysosomal mechanisms of PKC processing. An established pathway involves rate-limiting priming site dephosphorylation of the activated enzyme and proteasomal clearance of the dephosphorylated protein. However, here we show that agonists promote down-regulation of endogenous PKCα with minimal accumulation of a nonphosphorylated species in multiple cell types. Furthermore, proteasome and lysosome inhibitors predominantly protect fully phosphorylated PKCα, pointing to this form as a substrate for degradation. Failure to detect substantive dephosphorylation of activated PKCα was not due to rephosphorylation because inhibition of Hsp70/Hsc70, which is required for re-priming, had only a minor effect on agonist-induced accumulation of nonphosphorylated protein. Thus, PKC degradation can occur in the absence of dephosphorylation. Further analysis revealed novel functions for Hsp70/Hsc70 and Hsp90 in the control of agonist-induced PKCα processing. These chaperones help to maintain phosphorylation of activated PKCα but have opposing effects on degradation of the phosphorylated protein; Hsp90 is protective, whereas Hsp70/Hsc70 activity is required for proteasomal processing of this species. Notably, down-regulation of nonphosphorylated PKCα shows little Hsp70/Hsc70 dependence, arguing that phosphorylated and nonphosphorylated species are differentially targeted for proteasomal degradation. Finally, lysosomal processing of activated PKCα is not regulated by phosphorylation or Hsps. Collectively, these data demonstrate that phosphorylated PKCα is a direct target for agonist-induced proteasomal degradation via an Hsp-regulated mechanism, and highlight the existence of a novel pathway of PKC desensitization in cells.
Collapse
Affiliation(s)
- Michelle A Lum
- From The Eppley Institute, University of Nebraska Medical Center, Omaha, Nebraska 68198-5950; Department of Pharmacology and Therapeutics, Roswell Park Cancer Institute, Buffalo, New York 14263
| | | | | | - Adrian R Black
- From The Eppley Institute, University of Nebraska Medical Center, Omaha, Nebraska 68198-5950; Department of Pharmacology and Therapeutics, Roswell Park Cancer Institute, Buffalo, New York 14263
| | - Jennifer D Black
- From The Eppley Institute, University of Nebraska Medical Center, Omaha, Nebraska 68198-5950; Department of Pharmacology and Therapeutics, Roswell Park Cancer Institute, Buffalo, New York 14263.
| |
Collapse
|
35
|
Bottermann K, Reinartz M, Barsoum M, Kötter S, Gödecke A. Systematic Analysis Reveals Elongation Factor 2 and α-Enolase as Novel Interaction Partners of AKT2. PLoS One 2013; 8:e66045. [PMID: 23823123 PMCID: PMC3688836 DOI: 10.1371/journal.pone.0066045] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2013] [Accepted: 04/27/2013] [Indexed: 11/25/2022] Open
Abstract
AKT2 is one of the three isoforms of the protein kinase AKT being involved in the modulation of cellular metabolism. Since protein-protein interactions are one possibility to convey specificity in signal transduction, we performed AKT2-protein interaction analysis to elucidate their relevance for AKT2-dependent cellular functions. We identified heat shock protein 90 kDa (HSP90), Cdc37, heat shock protein 70 kDa (HSP70), 78 kDa glucose regulated protein (GRP78), tubulin, GAPDH, α-enolase and elongation factor 2 (EF2) as AKT2-interacting proteins by a combination of tandem affinity purification and mass spectrometry in HEK293T cells. Quantitative MS-analysis using stable isotope labeling by amino acids in cell culture (SILAC) revealed that only HSP90 and Cdc37 interact stably with AKT2, whereas the other proteins interact with low affinity with AKT2. The interactions of AKT2 with α-enolase and EF2 were further analyzed in order to uncover the functional relevance of these newly discovered binding partners. Despite the interaction of AKT2 and α-enolase, which was additionally validated by proximity ligation assay (PLA), no significant impact of AKT on α-enolase activity was detected in activity measurements. AKT stimulation via insulin and/or inhibition with the ATP-competitive inhibitor CCT128930 did not alter enzymatic activity of α-enolase. Interestingly, the direct interaction of AKT2 and EF2 was found to be dynamically regulated in embryonic rat cardiomyocytes. Treatment with the PI3-kinase inhibitor LY294002 before stimulation with several hormones stabilized the complex, whereas stimulation alone led to complex dissociation which was analyzed in situ with PLA. Taken together, these findings point to new aspects of AKT2-mediated signal transduction in protein synthesis and glucose metabolism.
Collapse
Affiliation(s)
- Katharina Bottermann
- Department of Cardiovascular Physiology, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
| | - Michael Reinartz
- Department of Cardiovascular Physiology, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
| | - Marian Barsoum
- Department of Cardiovascular Physiology, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
| | - Sebastian Kötter
- Department of Cardiovascular Physiology, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
| | - Axel Gödecke
- Department of Cardiovascular Physiology, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
- * E-mail:
| |
Collapse
|
36
|
Miyata Y, Rauch JN, Jinwal UK, Thompson AD, Srinivasan S, Dickey CA, Gestwicki JE. Cysteine reactivity distinguishes redox sensing by the heat-inducible and constitutive forms of heat shock protein 70. ACTA ACUST UNITED AC 2013. [PMID: 23177194 DOI: 10.1016/j.chembiol.2012.07.026] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
The heat shock protein 70 (Hsp70) family of molecular chaperones has important functions in maintaining proteostasis under stress conditions. Several Hsp70 isoforms, especially Hsp72 (HSPA1A), are dramatically upregulated in response to stress; however, it is unclear whether these family members have biochemical properties that are specifically adapted to these scenarios. The redox-active compound, methylene blue (MB), has been shown to inhibit the ATPase activity of Hsp72 in vitro, and it promotes degradation of the Hsp72 substrate, tau, in cellular and animal models. Here, we report that MB irreversibly inactivates Hsp72 but not the nearly identical, constitutively expressed isoform, heat shock cognate 70 (Hsc70; HSPA8). Mass spectrometry results show that MB oxidizes Cys306, which is not conserved in Hsc70. Molecular models suggested that oxidation of Cys306 exposes Cys267 to modification and that both events contribute to loss of ATP binding in response to MB. Consistent with this model, mutating Cys267 and Cys306 to serine made Hsp72 largely resistant to MB in vitro, and overexpression of the C306S mutant blocked MB-mediated loss of tau in a cellular model. Furthermore, mutating Cys267 and Cys306 to the pseudo-oxidation mimic, aspartic acid, mirrored MB treatment: the C267D and C306D mutants had reduced ATPase activity in vitro, and overexpression of the C267/306D double mutant significantly reduced tau levels in cells. Together, these results suggest that redox sensing by specific cysteine residues in Hsp72, but not Hsc70, may be an important component of the chaperone response to oxidative stress.
Collapse
Affiliation(s)
- Yoshinari Miyata
- Department of Pathology, Department of Biological Chemistry, and the Life Sciences Institute, University of Michigan, Ann Arbor, MI 48109-2216, USA
| | | | | | | | | | | | | |
Collapse
|
37
|
Dokladny K, Zuhl MN, Mandell M, Bhattacharya D, Schneider S, Deretic V, Moseley PL. Regulatory coordination between two major intracellular homeostatic systems: heat shock response and autophagy. J Biol Chem 2013; 288:14959-72. [PMID: 23576438 DOI: 10.1074/jbc.m113.462408] [Citation(s) in RCA: 118] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
The eukaryotic cell depends on multitiered homeostatic systems ensuring maintenance of proteostasis, organellar integrity, function and turnover, and overall cellular viability. At the two opposite ends of the homeostatic system spectrum are heat shock response and autophagy. Here, we tested whether there are interactions between these homeostatic systems, one universally operational in all prokaryotic and eukaryotic cells, and the other one (autophagy) is limited to eukaryotes. We found that heat shock response regulates autophagy. The interaction between the two systems was demonstrated by testing the role of HSF-1, the central regulator of heat shock gene expression. Knockdown of HSF-1 increased the LC3 lipidation associated with formation of autophagosomal organelles, whereas depletion of HSF-1 potentiated both starvation- and rapamycin-induced autophagy. HSP70 expression but not expression of its ATPase mutant inhibited starvation or rapamycin-induced autophagy. We also show that exercise induces autophagy in humans. As predicted by our in vitro studies, glutamine supplementation as a conditioning stimulus prior to exercise significantly increased HSP70 protein expression and prevented the expected exercise induction of autophagy. Our data demonstrate for the first time that heat shock response, from the top of its regulatory cascade (HSF-1) down to the execution stages delivered by HSP70, controls autophagy thus connecting and coordinating the two extreme ends of the homeostatic systems in the eukaryotic cell.
Collapse
Affiliation(s)
- Karol Dokladny
- Department of Internal Medicine, University of New Mexico Health Sciences Center, Albuquerque, New Mexico 87131, USA
| | | | | | | | | | | | | |
Collapse
|
38
|
Abstract
Imbalanced protein load within cells is a critical aspect for most diseases of aging. In particular, the accumulation of proteins into neurotoxic aggregates is a common thread for a host of neurodegenerative diseases. Recent work demonstrates that age-related changes to the cellular chaperone repertoire contributes to abnormal buildup of the microtubule-associated protein tau that accumulates in a group of diseases termed tauopathies, the most common being Alzheimer's disease (AD). The Hsp90 co-chaperone repertoire has diverse effects on tau stability; some co-chaperones stabilize tau while others facilitate its clearance. We propose that each of these proteins may be novel therapeutic targets. While targeting Hsp90 directly may be deleterious at the organismal level, perhaps targeting individual co-chaperone activities will be more tolerable.
Collapse
Affiliation(s)
- Umesh K Jinwal
- Department of Molecular Medicine, USF Health Byrd Alzheimer's Institute, Tampa, Florida 33613
| | | | | |
Collapse
|
39
|
Assimon VA, Gillies AT, Rauch JN, Gestwicki JE. Hsp70 protein complexes as drug targets. Curr Pharm Des 2013; 19:404-17. [PMID: 22920901 PMCID: PMC3593251 DOI: 10.2174/138161213804143699] [Citation(s) in RCA: 87] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2012] [Accepted: 08/15/2012] [Indexed: 12/22/2022]
Abstract
Heat shock protein 70 (Hsp70) plays critical roles in proteostasis and is an emerging target for multiple diseases. However, competitive inhibition of the enzymatic activity of Hsp70 has proven challenging and, in some cases, may not be the most productive way to redirect Hsp70 function. Another approach is to inhibit Hsp70's interactions with important co-chaperones, such as J proteins, nucleotide exchange factors (NEFs) and tetratricopeptide repeat (TPR) domain-containing proteins. These co-chaperones normally bind Hsp70 and guide its many diverse cellular activities. Complexes between Hsp70 and co-chaperones have been shown to have specific functions, including roles in pro-folding, pro-degradation and pro-trafficking pathways. Thus, a promising strategy may be to block protein- protein interactions between Hsp70 and its co-chaperones or to target allosteric sites that disrupt these contacts. Such an approach might shift the balance of Hsp70 complexes and re-shape the proteome and it has the potential to restore healthy proteostasis. In this review, we discuss specific challenges and opportunities related to these goals. By pursuing Hsp70 complexes as drug targets, we might not only develop new leads for therapeutic development, but also discover new chemical probes for use in understanding Hsp70 biology.
Collapse
Affiliation(s)
- Victoria A Assimon
- Department of Pathology, Life Sciences Institute, University of Michigan, 210 Washtenaw Ave., Ann Arbor, MI 48109-2216, USA
| | | | | | | |
Collapse
|
40
|
Carman A, Kishinevsky S, Koren J, Lou W, Chiosis G. Chaperone-dependent Neurodegeneration: A Molecular Perspective on Therapeutic Intervention. ACTA ACUST UNITED AC 2013; 2013. [PMID: 25258700 PMCID: PMC4172285 DOI: 10.4172/2161-0460.s10-007] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Maintenance of cellular homeostasis is regulated by the molecular chaperones. Under pathogenic conditions, aberrant proteins are triaged by the chaperone network. These aberrant proteins, known as "clients," have major roles in the pathogenesis of numerous neurological disorders, including tau in Alzheimer's disease, α-synuclein and LRRK2 in Parkinson's disease, SOD-1, TDP-43 and FUS in amyotrophic lateral sclerosis, and polyQ-expanded proteins such as huntingtin in Huntington's disease. Recent work has demonstrated that the use of chemical compounds which inhibit the activity of molecular chaperones subsequently alter the fate of aberrant clients. Inhibition of Hsp90 and Hsc70, two major molecular chaperones, has led to a greater understanding of how chaperone triage decisions are made and how perturbing the chaperone system can promote clearance of these pathogenic clients. Described here are major pathways and components of several prominent neurological disorders. Also discussed is how treatment with chaperone inhibitors, predominately Hsp90 inhibitors which are selective for a diseased state, can relieve the burden of aberrant client signaling in these neurological disorders.
Collapse
Affiliation(s)
- Aaron Carman
- Department of Molecular Pharmacology and Chemistry, Memorial Sloan-Kettering Cancer Centre, New York, NY, USA
| | - Sarah Kishinevsky
- Department of Molecular Pharmacology and Chemistry, Memorial Sloan-Kettering Cancer Centre, New York, NY, USA
| | - John Koren
- Department of Molecular Pharmacology and Chemistry, Memorial Sloan-Kettering Cancer Centre, New York, NY, USA
| | - Wenjie Lou
- Department of Neurology and Neuroscience, Weill Cornell Medical College, New York, NY, USA
| | - Gabriela Chiosis
- Department of Molecular Pharmacology and Chemistry, Memorial Sloan-Kettering Cancer Centre, New York, NY, USA
| |
Collapse
|
41
|
Abstract
T-cell leukemia/lymphoma 1 (TCL1) is an oncogene overexpressed in T-cell prolymphocytic leukemia and in B-cell malignancies including B-cell chronic lymphocytic leukemia and lymphomas. To date, only a limited number of Tcl1-interacting proteins that regulate its oncogenic function have been identified. Prior studies used a proteomic approach to identify a novel interaction between Tcl1 with Ataxia Telangiectasia Mutated. The association of Tcl1 and Ataxia Telangiectasia Mutated leads to activation of the NF-κB pathway. Here, we demonstrate that Tcl1 also interacts with heat shock protein (Hsp) 70. The Tcl1-Hsp70 complex was validated by coimmunoprecipitation experiments. In addition, we report that Hsp70, a protein that plays a critical role in the folding and maturation of several oncogenic proteins, associates with Tcl1 protein and stabilizes its expression. The inhibition of the ATPase activity of Hsp70 results in ubiquitination and proteasome-dependent degradation of Tcl1. The inhibition of Hsp70 significantly reduced the growth of lymphoma xenografts in vivo and down-regulated the expression of Tcl1 protein. Our findings reveal a functional interaction between Tcl1 and Hsp70 and identify Tcl1 as a novel Hsp70 client protein. These findings suggest that inhibition of Hsp70 may represent an alternative effective therapy for chronic lymphocytic leukemia and lymphomas via its ability to inhibit the oncogenic functions of Tcl1.
Collapse
|
42
|
Davis MJ, Gregorka B, Gestwicki JE, Swanson JA. Inducible renitence limits Listeria monocytogenes escape from vacuoles in macrophages. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2012; 189:4488-95. [PMID: 23002437 PMCID: PMC3478491 DOI: 10.4049/jimmunol.1103158] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Membranes of endolysosomal compartments in macrophages are often damaged by physical or chemical effects of particles ingested through phagocytosis or by toxins secreted by intracellular pathogens. This study identified a novel inducible activity in macrophages that increases resistance of phagosomes, late endosomes, and lysosomes to membrane damage. Pretreatment of murine macrophages with LPS, peptidoglycan, TNF-α, or IFN-γ conferred protection against subsequent damage to intracellular membranes caused by photooxidative chemistries or by phagocytosis of ground silica or silica microspheres. Phagolysosome damage was partially dependent on reactive oxygen species but was independent of the phagocyte oxidase. IFN-γ-stimulated macrophages from mice lacking the phagocyte oxidase inhibited escape from vacuoles by the intracellular pathogen Listeria monocytogenes, which suggested a role for this inducible renitence (resistance to pressure) in macrophage resistance to infection by pathogens that damage intracellular membranes. Renitence and inhibition of L. monocytogenes escape were partially attributable to heat shock protein-70. Thus, renitence is a novel, inducible activity of macrophages that maintains or restores the integrity of endolysosomal membranes.
Collapse
Affiliation(s)
- Michael J. Davis
- Graduate Program in Immunology, University of Michigan Medical School, Ann Arbor, MI 48109-5620
| | - Brian Gregorka
- Department of Microbiology and Immunology, University of Michigan Medical School, Ann Arbor, MI 48109-5620
| | - Jason E. Gestwicki
- Life Sciences Institute. University of Michigan, Ann Arbor, MI 48109, U.S.A
| | - Joel A. Swanson
- Graduate Program in Immunology, University of Michigan Medical School, Ann Arbor, MI 48109-5620
- Department of Microbiology and Immunology, University of Michigan Medical School, Ann Arbor, MI 48109-5620
| |
Collapse
|
43
|
Touchberry CD, Gupte AA, Bomhoff GL, Graham ZA, Geiger PC, Gallagher PM. Acute heat stress prior to downhill running may enhance skeletal muscle remodeling. Cell Stress Chaperones 2012; 17:693-705. [PMID: 22589083 PMCID: PMC3468678 DOI: 10.1007/s12192-012-0343-5] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2011] [Revised: 04/16/2012] [Accepted: 04/23/2012] [Indexed: 02/07/2023] Open
Abstract
Heat shock proteins (HSPs) are chaperones that are known to have important roles in facilitating protein synthesis, protein assembly and cellular protection. While HSPs are known to be induced by damaging exercise, little is known about how HSPs actually mediate skeletal muscle adaption to exercise. The purpose of this study was to determine the effects of a heat shock pretreatment and the ensuing increase in HSP expression on early remodeling and signaling (2 and 48 h) events of the soleus (Sol) muscle following a bout of downhill running. Male Wistar rats (10 weeks old) were randomly assigned to control, eccentric exercise (EE; downhill running) or heat shock + eccentric exercise (HS; 41°C for 20 min, 48 h prior to exercise) groups. Markers of muscle damage, muscle regeneration and intracellular signaling were assessed. The phosphorylation (p) of HSP25, Akt, p70s6k, ERK1/2 and JNK proteins was also performed. As expected, following exercise the EE group had increased creatine kinase (CK; 2 h) and mononuclear cell infiltration (48 h) compared to controls. The EE group had an increase in p-HSP25, but there was no change in HSP72 expression, total protein concentration, or neonatal MHC content. Additionally, the EE group had increased p-p70s6k, p-ERK1/2, and p-JNK (2 h) compared to controls; however no changes in p-Akt were seen. In contrast, the HS group had reduced CK (2 h) and mononuclear cell infiltration (48 h) compared to EE. Moreover, the HS group had increased HSP72 content (2 and 48 h), total protein concentration (48 h), neonatal MHC content (2 and 48 h), p-HSP25 and p-p70s6k (2 h). Lastly, the HS group had reduced p-Akt (48 h) and p-ERK1/2 (2 h). These data suggest that heat shock pretreatment and/or the ensuing HSP72 response may protect against muscle damage, and enhance increases in total protein and neonatal MHC content following exercise. These changes appear to be independent of Akt and MAPK signaling pathways.
Collapse
Affiliation(s)
- Chad D. Touchberry
- University of Missouri-Kansas City, School of Medicine - Basic Medical Science, Health Sciences Building, 2464 Charlotte Street, Room 2211, Kansas City, MO 64108 USA
| | - Anisha A. Gupte
- Muscle Physiology Laboratory, University of Kansas Medical Center, Kansas City, KS 66160 USA
| | - Gregory L. Bomhoff
- Muscle Physiology Laboratory, University of Kansas Medical Center, Kansas City, KS 66160 USA
| | - Zachary A. Graham
- Applied Physiology Laboratory, University of Kansas, 1301 Sunnyside Avenue, Lawrence, KS 66045 USA
| | - Paige C. Geiger
- Muscle Physiology Laboratory, University of Kansas Medical Center, Kansas City, KS 66160 USA
| | - Philip M. Gallagher
- Applied Physiology Laboratory, University of Kansas, 1301 Sunnyside Avenue, Lawrence, KS 66045 USA
| |
Collapse
|
44
|
Abisambra JF, Jinwal UK, Jones JR, Blair LJ, Koren J, Dickey CA. Exploiting the diversity of the heat-shock protein family for primary and secondary tauopathy therapeutics. Curr Neuropharmacol 2012; 9:623-31. [PMID: 22654720 PMCID: PMC3263456 DOI: 10.2174/157015911798376226] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2010] [Revised: 11/01/2010] [Accepted: 12/06/2010] [Indexed: 12/17/2022] Open
Abstract
The heat shock protein (Hsp) family is an evolutionarily conserved system that is charged with preventing unfolded or misfolded proteins in the cell from aggregating. In Alzheimer’s disease, extracellular accumulation of the amyloid β peptide (Aβ) and intracellular aggregation of the microtubule associated protein tau may result from mechanisms involving chaperone proteins like the Hsps. Due to the ability of Hsps to regulate aberrantly accumulating proteins like Aβ and tau, therapeutic strategies are emerging that target this family of chaperones to modulate their pathobiology. This article focuses on the use of Hsp-based therapeutics for treating primary and secondary tauopathies like Alzheimer’s disease. It will particularly focus on the pharmacological targeting of the Hsp70/90 system and the value of manipulating Hsp27 for treating Alzheimer’s disease.
Collapse
Affiliation(s)
- Jose F Abisambra
- Department of Molecular Medicine, USF Health Byrd Alzheimer's Institute, Tampa, FL 33613, USA
| | | | | | | | | | | |
Collapse
|
45
|
Ciocca DR, Arrigo AP, Calderwood SK. Heat shock proteins and heat shock factor 1 in carcinogenesis and tumor development: an update. Arch Toxicol 2012; 87:19-48. [PMID: 22885793 DOI: 10.1007/s00204-012-0918-z] [Citation(s) in RCA: 194] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2012] [Accepted: 07/25/2012] [Indexed: 12/20/2022]
Abstract
Heat shock proteins (HSP) are a subset of the molecular chaperones, best known for their rapid and abundant induction by stress. HSP genes are activated at the transcriptional level by heat shock transcription factor 1 (HSF1). During the progression of many types of cancer, this heat shock transcriptional regulon becomes co-opted by mechanisms that are currently unclear, although evidently triggered in the emerging tumor cell. Concerted activation of HSF1 and the accumulation of HSPs then participate in many of the traits that permit the malignant phenotype. Thus, cancers of many histologies exhibit activated HSF1 and increased HSP levels that may help to deter tumor suppression and evade therapy in the clinic. We review here the extensive work that has been carried out and is still in progress aimed at (1) understanding the oncogenic mechanisms by which HSP genes are switched on, (2) determining the roles of HSF1/HSP in malignant transformation and (3) discovering approaches to therapy based on disrupting the influence of the HSF1-controlled transcriptome in cancer.
Collapse
Affiliation(s)
- Daniel R Ciocca
- Oncology Laboratory, Institute of Experimental Medicine and Biology of Cuyo (IMBECU), Scientific and Technological Center (CCT), CONICET, 5500 Mendoza, Argentina.
| | - Andre Patrick Arrigo
- Apoptosis Cancer and Development, Cancer Research Center of Lyon (CRCL), UMR INSERM 1052-CNRS 5286, Claude Bernard University, Lyon-1, Cheney A Building, Centre Regional Léon Bérard, 28, rue Laennec 69008 LYON, France. ;
| | - Stuart K Calderwood
- Molecular and Cellular Radiation Oncology, Department of Radiation Oncology, Beth Israel Deaconess Medical Center, Boston, MA02215
| |
Collapse
|
46
|
Farmer KL, Li C, Dobrowsky RT. Diabetic peripheral neuropathy: should a chaperone accompany our therapeutic approach? Pharmacol Rev 2012; 64:880-900. [PMID: 22885705 DOI: 10.1124/pr.111.005314] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Diabetic peripheral neuropathy (DPN) is a common complication of diabetes that is associated with axonal atrophy, demyelination, blunted regenerative potential, and loss of peripheral nerve fibers. The development and progression of DPN is due in large part to hyperglycemia but is also affected by insulin deficiency and dyslipidemia. Although numerous biochemical mechanisms contribute to DPN, increased oxidative/nitrosative stress and mitochondrial dysfunction seem intimately associated with nerve dysfunction and diminished regenerative capacity. Despite advances in understanding the etiology of DPN, few approved therapies exist for the pharmacological management of painful or insensate DPN. Therefore, identifying novel therapeutic strategies remains paramount. Because DPN does not develop with either temporal or biochemical uniformity, its therapeutic management may benefit from a multifaceted approach that inhibits pathogenic mechanisms, manages inflammation, and increases cytoprotective responses. Finally, exercise has long been recognized as a part of the therapeutic management of diabetes, and exercise can delay and/or prevent the development of painful DPN. This review presents an overview of existing therapies that target both causal and symptomatic features of DPN and discusses the role of up-regulating cytoprotective pathways via modulating molecular chaperones. Overall, it may be unrealistic to expect that a single pharmacologic entity will suffice to ameliorate the multiple symptoms of human DPN. Thus, combinatorial therapies that target causal mechanisms and enhance endogenous reparative capacity may enhance nerve function and improve regeneration in DPN if they converge to decrease oxidative stress, improve mitochondrial bioenergetics, and increase response to trophic factors.
Collapse
Affiliation(s)
- Kevin L Farmer
- Department of Pharmacology and Toxicology, The University of Kansas, Lawrence, KS 66045, USA
| | | | | |
Collapse
|
47
|
Gong X, Luo T, Deng P, Liu Z, Xiu J, Shi H, Jiang Y. Stress-induced interaction between p38 MAPK and HSP70. Biochem Biophys Res Commun 2012; 425:357-62. [DOI: 10.1016/j.bbrc.2012.07.096] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2012] [Accepted: 07/18/2012] [Indexed: 10/28/2022]
|
48
|
Whitlock KA, Kozicky L, Jin A, Yee H, Ha C, Morris J, Field CJ, Bell RC, Ozga JA, Chan CB. Assessment of the mechanisms exerting glucose-lowering effects of dried peas in glucose-intolerant rats. Br J Nutr 2012; 108 Suppl 1:S91-102. [PMID: 22916820 DOI: 10.1017/s0007114512000736] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
The present study compared the effects of feeding uncooked pea fractions (embryo v. seed coat) on glucose homeostasis in glucose-intolerant rats and examined potential mechanisms influencing glucose homeostasis. Rats were made glucose intolerant by high-fat feeding, after which diets containing both high-fat and pea fractions were fed for 4 weeks. Rats fed diets containing uncooked pea seed coats low (non-coloured seed coat; NSC) or high (coloured seed coat; CSC) in proanthocyanidins but not embryos had improved oral glucose tolerance (P < 0·05). NSC also lowered fasting and glucose-stimulated insulin secretion (P < 0·05), decreased β-cell mass by 50 % (P < 0·05) and lowered levels of malondialdehyde, a marker of oxidative stress. Furthermore, NSC decreased the mucosal thickness of the colon by 25 % (P < 0·05), which might affect fibre fermentation and other gut functions. Small but statistically significant (P < 0·05) effects consistent with enhanced glucose transport or metabolism were observed in the skeletal muscle of rats fed NSC or CSC, for example, increased levels of AMP-dependent kinase or akt. We conclude that pea seed coats are the fraction exerting beneficial effects on glucose tolerance. Most of the changes were small in amplitude, suggesting that additive effects on multiple tissues may be important. NSC content appeared to have the most beneficial effects in improving glucose homeostasis but our ability to detect the effect of flavonoids may have been limited by their low concentration in the diet.
Collapse
Affiliation(s)
- Kevin A Whitlock
- Department of Physiology, University of Alberta, Edmonton, Alberta, Canada T6G 2R3
| | | | | | | | | | | | | | | | | | | |
Collapse
|
49
|
Huang JG, Gao XJ, Li QZ, Lu LM, Liu R, Luo CC, Wang JL, Bin Q, Jin X. Proteomic analysis of the nuclear phosphorylated proteins in dairy cow mammary epithelial cells treated with estrogen. In Vitro Cell Dev Biol Anim 2012; 48:449-57. [PMID: 22806971 DOI: 10.1007/s11626-012-9531-y] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2012] [Accepted: 06/21/2012] [Indexed: 01/27/2023]
Abstract
Estrogen regulates a variety of physiological processes, including mammary gland growth, morphogenesis of the mammary gland, proliferation and differentiation, and elevating the expression of milk proteins. Many nuclear phosphorylated proteins such as pStat5 and mTOR regulate milk protein synthesis. But the detail of milk protein synthesis controlled at the transcript level and posttranslational level is not well-known. To contribute to the understanding of the molecular mechanism underlying estrogen action on the dairy cow mammary epithelial cells (DCMECs), nuclear phosphorylated proteins regulated by estrogen in DCMECs were identified. Two-dimensional gel electrophoresis and matrix-assisted laser desorption/ionization/time of flight mass spectrometry were used to identify the changes of nuclear phosphorylated proteins in DCMECs treated with estrogen. Seven proteins were identified differentially up-expressed in DCMECs after 24-h estrogen exposure: including glycyl-tRNA synthetase, previously reported in milk protein synthesis of DCMECs, belonging to the class-II aminoacyl-tRNA synthetase family; proteins involved in other cellular functions, such as translation initiation factors, GTP-binding nuclear proteins, heat-shock proteins, and proteins belonging to ubiquitin-proteasome system. This screening reveals that estrogen influences the levels of nuclear phosphorylated proteins of DCMECs which opens new avenue for the study of the molecular mechanism linking to milk synthesis.
Collapse
Affiliation(s)
- Jian-Guo Huang
- The Key Laboratory of Dairy Science of Education Ministry, Northeast Agricultural University, Xiangfang District, Harbin, Heilongjiang Province, China
| | | | | | | | | | | | | | | | | |
Collapse
|
50
|
Koren J, Miyata Y, Kiray J, O'Leary JC, Nguyen L, Guo J, Blair LJ, Li X, Jinwal UK, Cheng JQ, Gestwicki JE, Dickey CA. Rhodacyanine derivative selectively targets cancer cells and overcomes tamoxifen resistance. PLoS One 2012; 7:e35566. [PMID: 22563386 PMCID: PMC3338522 DOI: 10.1371/journal.pone.0035566] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2012] [Accepted: 03/17/2012] [Indexed: 11/18/2022] Open
Abstract
MKT-077, a rhodacyanine dye, was shown to produce cancer specific cell death. However, complications prevented the use of this compound beyond clinical trials. Here we describe YM-1, a derivative of MKT-077. We found that YM-1 was more cytotoxic and localized differently than MKT-077. YM-1 demonstrated this cytotoxicity across multiple cancer cell lines. This toxicity was limited to cancer cell lines; immortalized cell models were unaffected. Brief applications of YM-1 were found to be non-toxic. Brief treatment with YM-1 restored tamoxifen sensitivity to a refractory tamoxifen-resistant MCF7 cell model. This effect is potentially due to altered estrogen receptor alpha phosphorylation, an outcome precipitated by selective reductions in Akt levels (Akt/PKB). Thus, modifications to the rhodocyanine scaffold could potentially be made to improve efficacy and pharmacokinetic properties. Moreover, the impact on tamoxifen sensitivity could be a new utility for this compound family.
Collapse
Affiliation(s)
- John Koren
- Department of Molecular Medicine, USF Health Byrd Alzheimer's Institute, College of Medicine, University of South Florida, Tampa, Florida, United States of America
| | - Yoshinari Miyata
- Departments of Pathology and Biological Chemistry, Life Sciences Institute, University of Michigan, Ann Arbor, Michigan, United States of America
| | - Janine Kiray
- Department of Molecular Medicine, USF Health Byrd Alzheimer's Institute, College of Medicine, University of South Florida, Tampa, Florida, United States of America
| | - John C. O'Leary
- Department of Molecular Medicine, USF Health Byrd Alzheimer's Institute, College of Medicine, University of South Florida, Tampa, Florida, United States of America
| | - Lana Nguyen
- Department of Molecular Medicine, USF Health Byrd Alzheimer's Institute, College of Medicine, University of South Florida, Tampa, Florida, United States of America
| | - Jianping Guo
- Department of Molecular Oncology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida, United States of America
| | - Laura J. Blair
- Department of Molecular Medicine, USF Health Byrd Alzheimer's Institute, College of Medicine, University of South Florida, Tampa, Florida, United States of America
| | - Xiokai Li
- Departments of Pathology and Biological Chemistry, Life Sciences Institute, University of Michigan, Ann Arbor, Michigan, United States of America
| | - Umesh K. Jinwal
- College of Pharmacy, University of South Florida, Tampa, Florida, United States of America
| | - Jin Q. Cheng
- Department of Molecular Oncology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida, United States of America
| | - Jason E. Gestwicki
- Departments of Pathology and Biological Chemistry, Life Sciences Institute, University of Michigan, Ann Arbor, Michigan, United States of America
| | - Chad A. Dickey
- Department of Molecular Medicine, USF Health Byrd Alzheimer's Institute, College of Medicine, University of South Florida, Tampa, Florida, United States of America
- * E-mail:
| |
Collapse
|