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Mahto FK, Bhattacharya A, Bhattacharya S. Molecular dynamics simulations shows real-time lid opening in Hsp70 chaperone. J Mol Graph Model 2024; 129:108726. [PMID: 38377794 DOI: 10.1016/j.jmgm.2024.108726] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2023] [Revised: 12/12/2023] [Accepted: 02/08/2024] [Indexed: 02/22/2024]
Abstract
The stress-inducible mammalian heat shock protein Hsp70 and its bacterial orthologue DnaK are highly conserved molecular chaperones and a crucial part of the machinery responsible for protein folding and homeostasis. Hsp70 is a three-domain, 70 kDa protein that cycles between an ATP-bound state in which all three domains are securely coupled into one unit and an ADP-bound state in which they are loosely attached via a flexible interdomain linker. The Hsp70 presents an alluring novel therapeutic target since it is crucial for maintaining cellular proteostasis and is particularly crucial to cancer cells. We have performed molecular dynamics simulations of the SBD (substrate binding domain) along with the Lid domain in response to experimental efforts to identify small molecule inhibitors that impair the functioning of Hsp70. Our intent has been to characterize the motion of the SBD/Lid allosteric machinery and in, addition, to identify the effect of the PET16 molecule on this motion. Interestingly, we noticed the opening of the entire Lid domain in the apo-form of the dimer. The configuration of the open structure was very different from previously published structures (PDB 4JN4) of the open and docked conformation of the ATP bound form. MD simulations revealed the Lid to be capable of far greater dynamical excursions than has been anticipated by experimental structural biology. This is of value in future drug discovery efforts targeted to modulating Hsp70 activity. The PET16 molecule appears to be weakly bound and its effect on the dynamics of the complex is yet to be elucidated.
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Affiliation(s)
- Farindra Kumar Mahto
- Department of Chemical Engineering, Indian Institute of Technology Bombay, Mumbai, 400076, India.
| | | | - Swati Bhattacharya
- Department of Chemical Engineering, Indian Institute of Technology Bombay, Mumbai, 400076, India.
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2
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Avola R, Graziano ACE, Madrid A, Clericuzio M, Cardile V, Russo A. Pholiotic acid promotes apoptosis in human metastatic melanoma cells. Chem Biol Interact 2024; 390:110894. [PMID: 38301881 DOI: 10.1016/j.cbi.2024.110894] [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: 11/23/2023] [Revised: 12/30/2023] [Accepted: 01/29/2024] [Indexed: 02/03/2024]
Abstract
Mushrooms produce a great variety of secondary metabolites that can be successful in both prevention and treatment of various cancers. In particular, higher Basidiomycete mushrooms contain various types of biologically active low-molecular compounds in fruiting bodies with suggested anticarcinogenic effects. The polyamine analogue {(2R)-2-[(S)-3-hydroxy-3-methylglutaryloxy] putrescine dicinnamamide} indicated with the name pholiotic acid, isolated for the first time by us from the fruiting bodies of the Basidiomycete Pholiota spumosa (Fr.) Sing. (Strophariaceae), inhibited the viability of human prostate cancer cells, such as other polyamine synthetic analogues that have shown antitumor activity in several types of cancer, including melanoma. Melanoma is an aggressive skin cancer that can metastasize to other organs and presents a high resistance to conventional therapies. In light of these considerations, the present study was therefore designed to assess whether this putrescine derivative could inhibit the growth of human metastatic melanoma cell lines, M14 and A2058. The results obtained demonstrate that this natural compound, at 12.5-50 μM concentration, was able to reduce cell viability of both cancer cells inducing cell death by intrinsic apoptotic pathway that probably involves PTEN activity, inhibition of Hsp70 expression and reactive oxygen species production. On the other hand, the increased expression of enzymes involved in polyamine catabolism trigger apoptotic cell death leading to polyamine depletion and generation of reactive oxygen species as by-products. In conclusion, these findings, starting point for further investigation, implement available our data to support pholiotic acid as an attractive potential chemopreventive agent, and provide a basis for further research into the use of this polyamine derivative as potential anticancer agent for melanoma in combination with existing therapies to improve treatment efficacy and overcome the obstacle of drug resistance.
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Affiliation(s)
- R Avola
- Faculty of Medicine and Surgery, University of Enna "Kore", 94100, Enna, Italy
| | - A C E Graziano
- Faculty of Medicine and Surgery, University of Enna "Kore", 94100, Enna, Italy
| | - A Madrid
- Dept. de Química, Facultad de Ciencias Naturales y Exactas, Universidad de Playa Ancha, Avda. Leopoldo Carvallo 270, Playa Ancha, Valparaíso, 2340000, Chile
| | - M Clericuzio
- Dept. of Science and Technological Innovation, University of Piemonte Orientale, V.le T. Michel 11, 15121, Alessandria, Italy
| | - V Cardile
- Dept. of Biomedical and Biotechnological Sciences, University of Catania, Via S. Sofia, 89, 95123, Catania, Italy
| | - A Russo
- Dept. of Drug and Health Sciences, University of Catania, V.le A. Doria 6, 95125, Catania, Italy.
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Zhao K, Zhou G, Liu Y, Zhang J, Chen Y, Liu L, Zhang G. HSP70 Family in Cancer: Signaling Mechanisms and Therapeutic Advances. Biomolecules 2023; 13:601. [PMID: 37189349 PMCID: PMC10136146 DOI: 10.3390/biom13040601] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 03/10/2023] [Accepted: 03/17/2023] [Indexed: 03/29/2023] Open
Abstract
The 70 kDa heat shock proteins (HSP70s) are a group of highly conserved and inducible heat shock proteins. One of the main functions of HSP70s is to act as molecular chaperones that are involved in a large variety of cellular protein folding and remodeling processes. HSP70s are found to be over-expressed and may serve as prognostic markers in many types of cancers. HSP70s are also involved in most of the molecular processes of cancer hallmarks as well as the growth and survival of cancer cells. In fact, many effects of HSP70s on cancer cells are not only related to their chaperone activities but rather to their roles in regulating cancer cell signaling. Therefore, a number of drugs directly or indirectly targeting HSP70s, and their co-chaperones have been developed aiming to treat cancer. In this review, we summarized HSP70-related cancer signaling pathways and corresponding key proteins regulated by the family of HSP70s. In addition, we also summarized various treatment approaches and progress of anti-tumor therapy based on targeting HSP70 family proteins.
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Affiliation(s)
- Kejia Zhao
- Department of Thoracic Surgery and Institute of Thoracic Oncology, West China Hospital, Sichuan University, Chengdu 610041, China
- Western China Collaborative Innovation Center for Early Diagnosis and Multidisciplinary Therapy of Lung Cancer, Chengdu 610041, China
| | - Guanyu Zhou
- Department of Thoracic Surgery and Institute of Thoracic Oncology, West China Hospital, Sichuan University, Chengdu 610041, China
- Western China Collaborative Innovation Center for Early Diagnosis and Multidisciplinary Therapy of Lung Cancer, Chengdu 610041, China
- Frontiers Science Center for Disease-related Molecular Network, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Yu Liu
- Faculty of Dentistry, The University of Hong Kong, Prince Philip Dental Hospital, Hong Kong 999077, China
| | - Jian Zhang
- Department of Thoracic Surgery and Institute of Thoracic Oncology, West China Hospital, Sichuan University, Chengdu 610041, China
- Western China Collaborative Innovation Center for Early Diagnosis and Multidisciplinary Therapy of Lung Cancer, Chengdu 610041, China
| | - Yaohui Chen
- Department of Thoracic Surgery and Institute of Thoracic Oncology, West China Hospital, Sichuan University, Chengdu 610041, China
- Western China Collaborative Innovation Center for Early Diagnosis and Multidisciplinary Therapy of Lung Cancer, Chengdu 610041, China
| | - Lunxu Liu
- Department of Thoracic Surgery and Institute of Thoracic Oncology, West China Hospital, Sichuan University, Chengdu 610041, China
- Western China Collaborative Innovation Center for Early Diagnosis and Multidisciplinary Therapy of Lung Cancer, Chengdu 610041, China
| | - Gao Zhang
- Faculty of Dentistry, The University of Hong Kong, Prince Philip Dental Hospital, Hong Kong 999077, China
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Alhasan B, Mikeladze M, Guzhova I, Margulis B. Autophagy, molecular chaperones, and unfolded protein response as promoters of tumor recurrence. Cancer Metastasis Rev 2023; 42:217-254. [PMID: 36723697 DOI: 10.1007/s10555-023-10085-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Accepted: 01/16/2023] [Indexed: 02/02/2023]
Abstract
Tumor recurrence is a paradoxical function of a machinery, whereby a small proportion of the cancer cell population enters a resistant, dormant state, persists long-term in this condition, and then transitions to proliferation. The dormant phenotype is typical of cancer stem cells, tumor-initiating cells, disseminated tumor cells, and drug-tolerant persisters, which all demonstrate similar or even equivalent properties. Cancer cell dormancy and its conversion to repopulation are regulated by several protein signaling systems that inhibit or induce cell proliferation and provide optimal interrelations between cancer cells and their special niche; these systems act in close connection with tumor microenvironment and immune response mechanisms. During dormancy and reawakening periods, cell proteostasis machineries, autophagy, molecular chaperones, and the unfolded protein response are recruited to protect refractory tumor cells from a wide variety of stressors and therapeutic insults. Proteostasis mechanisms functionally or even physically interfere with the main regulators of tumor relapse, and the significance of these interactions and implications in the tumor recurrence phases are discussed in this review.
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Affiliation(s)
- Bashar Alhasan
- Institute of Cytology, Russian Academy of Sciences, Tikhoretsky Ave. 4, 194064, St. Petersburg, Russia.
| | - Marina Mikeladze
- Institute of Cytology, Russian Academy of Sciences, Tikhoretsky Ave. 4, 194064, St. Petersburg, Russia
| | - Irina Guzhova
- Institute of Cytology, Russian Academy of Sciences, Tikhoretsky Ave. 4, 194064, St. Petersburg, Russia
| | - Boris Margulis
- Institute of Cytology, Russian Academy of Sciences, Tikhoretsky Ave. 4, 194064, St. Petersburg, Russia
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Carpenter EL, Becker AL, Indra AK. NRF2 and Key Transcriptional Targets in Melanoma Redox Manipulation. Cancers (Basel) 2022; 14:cancers14061531. [PMID: 35326683 PMCID: PMC8946769 DOI: 10.3390/cancers14061531] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Revised: 03/13/2022] [Accepted: 03/14/2022] [Indexed: 02/04/2023] Open
Abstract
Melanocytes are dendritic, pigment-producing cells located in the skin and are responsible for its protection against the deleterious effects of solar ultraviolet radiation (UVR), which include DNA damage and elevated reactive oxygen species (ROS). They do so by synthesizing photoprotective melanin pigments and distributing them to adjacent skin cells (e.g., keratinocytes). However, melanocytes encounter a large burden of oxidative stress during this process, due to both exogenous and endogenous sources. Therefore, melanocytes employ numerous antioxidant defenses to protect themselves; these are largely regulated by the master stress response transcription factor, nuclear factor erythroid 2-related factor 2 (NRF2). Key effector transcriptional targets of NRF2 include the components of the glutathione and thioredoxin antioxidant systems. Despite these defenses, melanocyte DNA often is subject to mutations that result in the dysregulation of the proliferative mitogen-activated protein kinase (MAPK) pathway and the cell cycle. Following tumor initiation, endogenous antioxidant systems are co-opted, a consequence of elevated oxidative stress caused by metabolic reprogramming, to establish an altered redox homeostasis. This altered redox homeostasis contributes to tumor progression and metastasis, while also complicating the application of exogenous antioxidant treatments. Further understanding of melanocyte redox homeostasis, in the presence or absence of disease, would contribute to the development of novel therapies to aid in the prevention and treatment of melanomas and other skin diseases.
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Affiliation(s)
- Evan L. Carpenter
- Department of Pharmaceutical Sciences, College of Pharmacy, Oregon State University, Corvallis, OR 97331, USA; (E.L.C.); (A.L.B.)
| | - Alyssa L. Becker
- Department of Pharmaceutical Sciences, College of Pharmacy, Oregon State University, Corvallis, OR 97331, USA; (E.L.C.); (A.L.B.)
- John A. Burns School of Medicine, University of Hawaii, Honolulu, HI 96813, USA
| | - Arup K. Indra
- Department of Pharmaceutical Sciences, College of Pharmacy, Oregon State University, Corvallis, OR 97331, USA; (E.L.C.); (A.L.B.)
- Knight Cancer Institute, Oregon Health & Science University, Portland, OR 97239, USA
- Department of Biochemistry and Biophysics, Oregon State University, Corvallis, OR 97331, USA
- Linus Pauling Science Center, Oregon State University, Corvallis, OR 97331, USA
- Department of Dermatology, Oregon Health & Science University, Portland, OR 97239, USA
- Correspondence:
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Kurop MK, Huyen CM, Kelly JH, Blagg BSJ. The heat shock response and small molecule regulators. Eur J Med Chem 2021; 226:113846. [PMID: 34563965 PMCID: PMC8608735 DOI: 10.1016/j.ejmech.2021.113846] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Revised: 09/07/2021] [Accepted: 09/07/2021] [Indexed: 01/09/2023]
Abstract
The heat shock response (HSR) is a highly conserved cellular pathway that is responsible for stress relief and the refolding of denatured proteins [1]. When a host cell is exposed to conditions such as heat shock, ischemia, or toxic substances, heat shock factor-1 (HSF-1), a transcription factor, activates the genes that encode for the heat shock proteins (Hsps), which are a family of proteins that work alongside other chaperones to relieve stress and refold proteins that have been denatured (Burdon, 1986) [2]. Along with the refolding of denatured proteins, Hsps facilitate the removal of misfolded proteins by escorting them to degradation pathways, thereby preventing the accumulation of misfolded proteins [3]. Research has indicated that many pathological conditions, such as diabetes, cancer, neuropathy, cardiovascular disease, and aging have a negative impact on HSR function and are commonly associated with misfolded protein aggregation [4,5]. Studies indicate an interplay between mitochondrial homeostasis and HSF-1 levels can impact stress resistance, proteostasis, and malignant cell growth, which further support the role of Hsps in pathological and metabolic functions [6]. On the other hand, Hsp activation by specific small molecules can induce the heat shock response, which can afford neuroprotection and other benefits [7]. This review will focus on the modulation of Hsps and the HSR as therapeutic options to treat these conditions.
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Affiliation(s)
- Margaret K Kurop
- Warren Center for Drug Discovery, Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN, 46556, USA
| | - Cormac M Huyen
- Warren Center for Drug Discovery, Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN, 46556, USA
| | - John H Kelly
- Warren Center for Drug Discovery, Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN, 46556, USA
| | - Brian S J Blagg
- Warren Center for Drug Discovery, Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN, 46556, USA.
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7
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Kabakov AE, Gabai VL. HSP70s in Breast Cancer: Promoters of Tumorigenesis and Potential Targets/Tools for Therapy. Cells 2021; 10:cells10123446. [PMID: 34943954 PMCID: PMC8700403 DOI: 10.3390/cells10123446] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Revised: 11/25/2021] [Accepted: 12/03/2021] [Indexed: 12/20/2022] Open
Abstract
The high frequency of breast cancer worldwide and the high mortality among women with this malignancy are a serious challenge for modern medicine. A deeper understanding of the mechanisms of carcinogenesis and emergence of metastatic, therapy-resistant breast cancers would help development of novel approaches to better treatment of this disease. The review is dedicated to the role of members of the heat shock protein 70 subfamily (HSP70s or HSPA), mainly inducible HSP70, glucose-regulated protein 78 (GRP78 or HSPA5) and GRP75 (HSPA9 or mortalin), in the development and pathogenesis of breast cancer. Various HSP70-mediated cellular mechanisms and pathways which contribute to the oncogenic transformation of mammary gland epithelium are reviewed, as well as their role in the development of human breast carcinomas with invasive, metastatic traits along with the resistance to host immunity and conventional therapeutics. Additionally, intracellular and cell surface HSP70s are considered as potential targets for therapy or sensitization of breast cancer. We also discuss a clinical implication of Hsp70s and approaches to targeting breast cancer with gene vectors or nanoparticles downregulating HSP70s, natural or synthetic (small molecule) inhibitors of HSP70s, HSP70-binding antibodies, HSP70-derived peptides, and HSP70-based vaccines.
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Affiliation(s)
- Alexander E. Kabakov
- Department of Radiation Biochemistry, A. Tsyb Medical Radiological Research Center—Branch of the National Medical Research Radiological Center of the Ministry of Health of the Russian Federation, Koroleva 4, 249036 Obninsk, Russia;
| | - Vladimir L. Gabai
- CureLab Oncology Inc., Dedham, MA 02026, USA
- Correspondence: ; Tel.: +1-617-319-7314
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Mathien S, Tesnière C, Meloche S. Regulation of Mitogen-Activated Protein Kinase Signaling Pathways by the Ubiquitin-Proteasome System and Its Pharmacological Potential. Pharmacol Rev 2021; 73:263-296. [PMID: 34732541 DOI: 10.1124/pharmrev.120.000170] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Mitogen-activated protein kinase (MAPK) cascades are evolutionarily conserved signaling pathways that play essential roles in transducing extracellular environmental signals into diverse cellular responses to maintain homeostasis. These pathways are classically organized into an architecture of three sequentially acting protein kinases: a MAPK kinase kinase that phosphorylates and activates a MAPK kinase, which in turn phosphorylates and activates the effector MAPK. The activity of MAPKs is tightly regulated by phosphorylation of their activation loop, which can be modulated by positive and negative feedback mechanisms to control the amplitude and duration of the signal. The signaling outcomes of MAPK pathways are further regulated by interactions of MAPKs with scaffolding and regulatory proteins. Accumulating evidence indicates that, in addition to these mechanisms, MAPK signaling is commonly regulated by ubiquitin-proteasome system (UPS)-mediated control of the stability and abundance of MAPK pathway components. Notably, the biologic activity of some MAPKs appears to be regulated mainly at the level of protein turnover. Recent studies have started to explore the potential of targeted protein degradation as a powerful strategy to investigate the biologic functions of individual MAPK pathway components and as a new therapeutic approach to overcome resistance to current small-molecule kinase inhibitors. Here, we comprehensively review the mechanisms, physiologic importance, and pharmacological potential of UPS-mediated protein degradation in the control of MAPK signaling. SIGNIFICANCE STATEMENT: Accumulating evidence highlights the importance of targeted protein degradation by the ubiquitin-proteasome system in regulating and fine-tuning the signaling output of mitogen-activated protein kinase (MAPK) pathways. Manipulating protein levels of MAPK cascade components may provide a novel approach for the development of selective pharmacological tools and therapeutics.
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Affiliation(s)
- Simon Mathien
- Institute for Research in Immunology and Cancer, Montreal, Quebec, Canada (S.Ma., C.T., S.Me.); and Molecular Biology Program, Faculty of Medicine (C.T., S.Me.) and Department of Pharmacology and Physiology (S.Me.), Université de Montréal, Montreal, Quebec, Canada
| | - Chloé Tesnière
- Institute for Research in Immunology and Cancer, Montreal, Quebec, Canada (S.Ma., C.T., S.Me.); and Molecular Biology Program, Faculty of Medicine (C.T., S.Me.) and Department of Pharmacology and Physiology (S.Me.), Université de Montréal, Montreal, Quebec, Canada
| | - Sylvain Meloche
- Institute for Research in Immunology and Cancer, Montreal, Quebec, Canada (S.Ma., C.T., S.Me.); and Molecular Biology Program, Faculty of Medicine (C.T., S.Me.) and Department of Pharmacology and Physiology (S.Me.), Université de Montréal, Montreal, Quebec, Canada
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Jaishankar D, Cosgrove C, Ramesh P, Mahon J, Shivde R, Dellacecca ER, Yang SF, Mosenson J, Guevara-Patiño JA, Le Poole IC. HSP70i Q435A to subdue autoimmunity and support anti-tumor responses. Cell Stress Chaperones 2021; 26:845-857. [PMID: 34542825 PMCID: PMC8492854 DOI: 10.1007/s12192-021-01229-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Revised: 07/12/2021] [Accepted: 08/02/2021] [Indexed: 11/27/2022] Open
Abstract
Developing immunosuppressive therapies for autoimmune diseases comes with a caveat that immunosuppression may promote the risk of developing other conditions or diseases. We have previously shown that biolistic delivery of an expression construct encoding inducible HSP70 (HSP70i) with one amino acid modification in the dendritic cell (DC) activating moiety 435-445 (HSP70iQ435A) to mouse skin resulted in significant immunosuppressive activity of autoimmune vitiligo, associated with fewer tissue infiltrating T cells. To prepare HSP70iQ435A as a potential therapeutic for autoimmune vitiligo, in this study we evaluated whether and how biolistic delivery of HSP70iQ435A in mice affects anti-tumor responses. We found that HSP70iQ435A in fact supports anti-tumor responses in melanoma-challenged C57BL/6 mice. Biolistic delivery of the HSP70iQ435A-encoding construct to mice elicited significant anti-HSP70 titers, and anti-HSP70 IgG and IgM antibodies recognize surface-expressed and cytoplasmic HSP70i in human and mouse melanoma cells. A peptide scan revealed that the anti-HSP70 antibodies recognize a specific C-terminal motif within the HSP70i protein. The antibodies elicited surface CD107A expression among mouse NK cells, representative of antibody-mediated cellular cytotoxicity (ADCC), supporting the concept, that HSP70iQ435A-encoding DNA elicits a humoral response to the stress protein expressed selectively on the surface of melanoma cells. Thus, besides limiting autoimmunity and inflammation, HSP70iQ435A elicits humoral responses that limit tumor growth and may be used in conjunction with immune checkpoint inhibitors to not only control tumor but to also limit adverse events following tumor immunotherapy.
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Affiliation(s)
- Dinesh Jaishankar
- Department of Dermatology & Robert H. Lurie Comprehensive Cancer Center, Northwestern University, Chicago, IL, USA.
- Department of Surgery, Medical University of South Carolina, Charleston, SC, USA.
| | - Cormac Cosgrove
- Department of Dermatology & Robert H. Lurie Comprehensive Cancer Center, Northwestern University, Chicago, IL, USA
| | - Prathyaya Ramesh
- Department of Dermatology & Robert H. Lurie Comprehensive Cancer Center, Northwestern University, Chicago, IL, USA
| | - James Mahon
- Cardinal Bernardin Cancer Center, Loyola University Chicago, Chicago, IL, USA
| | - Rohan Shivde
- Department of Dermatology & Robert H. Lurie Comprehensive Cancer Center, Northwestern University, Chicago, IL, USA
| | - Emilia R Dellacecca
- Department of Dermatology & Robert H. Lurie Comprehensive Cancer Center, Northwestern University, Chicago, IL, USA
| | - Shiayin F Yang
- Department of Otolaryngology - Head and Neck Surgery, Loyola University Medical Center, Maywood, IL, USA
| | - Jeffrey Mosenson
- Cardinal Bernardin Cancer Center, Loyola University Chicago, Chicago, IL, USA
| | - José A Guevara-Patiño
- Department of Surgery, Loyola University Medical Center, Maywood, IL, USA
- Department of Immunology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, USA
| | - I Caroline Le Poole
- Department of Dermatology & Robert H. Lurie Comprehensive Cancer Center, Northwestern University, Chicago, IL, USA.
- Cardinal Bernardin Cancer Center, Loyola University Chicago, Chicago, IL, USA.
- Department of Microbiology & Immunology, Northwestern University, Chicago, IL, USA.
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10
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Inhibition of the Human Hsc70 System by Small Ligands as a Potential Anticancer Approach. Cancers (Basel) 2021; 13:cancers13122936. [PMID: 34208232 PMCID: PMC8230956 DOI: 10.3390/cancers13122936] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Accepted: 06/08/2021] [Indexed: 12/12/2022] Open
Abstract
Simple Summary High levels of Heat shock proteins (Hsps) in specific cancers are usually linked to a poor prognosis, tumor progression, invasiveness, and resistance to treatment. Chaperone inhibition could therefore be toxic for cancer cells due to their high dependence on chaperone activity to survive. This study shows the potential to repurpose the small chemical compound pinaverium bromide, currently used to treat functional gastrointestinal disorders, as a possible antitumor drug since it displays a marked toxicity against two melanoma cell lines without affecting the viability of fibroblast and primary melanocytes. This compound interacts with structural regions shared by representatives of the Hsp70 and Hsp110 families, inhibiting the substrate remodeling ability of the Hsp70 system in vitro and in a cellular context. Abstract Heat shock protein (Hsp) synthesis is upregulated in a wide range of cancers to provide the appropriate environment for tumor progression. The Hsp110 and Hsp70 families have been associated to cancer cell survival and resistance to chemotherapy. In this study, we explore the strategy of drug repurposing to find new Hsp70 and Hsp110 inhibitors that display toxicity against melanoma cancer cells. We found that the hits discovered using Apg2, a human representative of the Hsp110 family, as the initial target bind also to structural regions present in members of the Hsp70 family, and therefore inhibit the remodeling activity of the Hsp70 system. One of these compounds, the spasmolytic agent pinaverium bromide used for functional gastrointestinal disorders, inhibits the intracellular chaperone activity of the Hsp70 system and elicits its cytotoxic activity specifically in two melanoma cell lines by activating apoptosis. Docking and molecular dynamics simulations indicate that this compound interacts with regions located in the nucleotide-binding domain and the linker of the chaperones, modulating their ATPase activity. Thus, repurposing of pinaverium bromide for cancer treatment appears as a promising novel therapeutic approach.
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11
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Han L, Xu D, Xi Z, Wu M, Nik Nabil WN, Zhang J, Sui H, Fu W, Zhou H, Lao Y, Xu G, Guo C, Xu H. The Natural Compound Oblongifolin C Exhibits Anticancer Activity by Inhibiting HSPA8 and Cathepsin B In Vitro. Front Pharmacol 2021; 11:564833. [PMID: 33390942 PMCID: PMC7773843 DOI: 10.3389/fphar.2020.564833] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Accepted: 10/19/2020] [Indexed: 11/13/2022] Open
Abstract
PPAPs (Polycyclic polyprenylated acylphloroglucinols) are a class of compounds with diverse bioactivities, including anticancer effects. Oblongifolin C (OC) is a PPAP isolated from the plant of Garcinia yunnanensis Hu. We previously discovered that OC induces apoptosis, inhibits autophagic flux, and attenuates metastasis in cancer cells. However, the protein targets and the detailed mechanism of action of OC remain unclear. To identify protein targets of OC, a non-labeled protein fishing assay was performed, and it was found that OC may interact with several proteins, including the heat shock 70 kDa protein 8 (HSPA8). Expanding on our previous studies on protein cathepsin B, this current study applied Surface Plasmon Resonance (SPR) and Isothermal Titration Calorimetry (ITC) to confirm the potential binding affinity between OC and two protein targets. This study highlights the inhibitory effect of OC on HSPA8 in cancer cells under heat shock stress, by specifically inhibiting the translocation of HSPA8. OC also enhanced the interaction between HSPA8, HSP90, and p53, upregulated the expression of p53 and significantly promoted apoptosis in cisplatin-treated cells. Additionally, a flow cytometry assay detected that OC sped up the apoptosis rate in HSPA8 knockdown A549 cells, while overexpression of HSPA8 delayed the OC-induced apoptosis rate. In summary, our results reveal that OC potentially interacts with HSPA8 and cathepsin B and inhibits HSPA8 nuclear translocation and cathepsin B activities, altogether suggesting the potential of OC to be developed as an anticancer drug.
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Affiliation(s)
- Li Han
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, China.,Department of Pharmacy, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
| | - Danqing Xu
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Zhichao Xi
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Man Wu
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Wan Najbah Nik Nabil
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Juan Zhang
- School of Chinese Medicine, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, China
| | - Hua Sui
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Wenwei Fu
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Hua Zhou
- Institute of Cardiovascular Disease of Integrated Traditional Chinese and Western Medicine, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Yuanzhi Lao
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Gang Xu
- State Key Laboratory of Phytochemistry and Plant Resources in West China and Yunnan Key Laboratory of National Medicinal Chemistry, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, China
| | - Cheng Guo
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, China.,Department of Pharmacy, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
| | - Hongxi Xu
- Institute of Cardiovascular Disease of Integrated Traditional Chinese and Western Medicine, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
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12
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Barnoud T, Leung JC, Leu JIJ, Basu S, Poli ANR, Parris JLD, Indeglia A, Martynyuk T, Good M, Gnanapradeepan K, Sanseviero E, Moeller R, Tang HY, Cassel J, Kossenkov AV, Liu Q, Speicher DW, Gabrilovich DI, Salvino JM, George DL, Murphy ME. A Novel Inhibitor of HSP70 Induces Mitochondrial Toxicity and Immune Cell Recruitment in Tumors. Cancer Res 2020; 80:5270-5281. [PMID: 33023943 DOI: 10.1158/0008-5472.can-20-0397] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2020] [Revised: 08/24/2020] [Accepted: 10/02/2020] [Indexed: 12/13/2022]
Abstract
The protein chaperone HSP70 is overexpressed in many cancers including colorectal cancer, where overexpression is associated with poor survival. We report here the creation of a uniquely acting HSP70 inhibitor (HSP70i) that targets multiple compartments in the cancer cell, including mitochondria. This inhibitor was mitochondria toxic and cytotoxic to colorectal cancer cells, but not to normal colon epithelial cells. Inhibition of HSP70 was efficacious as a single agent in primary and metastatic models of colorectal cancer and enabled identification of novel mitochondrial client proteins for HSP70. In a syngeneic colorectal cancer model, the inhibitor increased immune cell recruitment into tumors. Cells treated with the inhibitor secreted danger-associated molecular patterns (DAMP), including ATP and HMGB1, and functioned effectively as a tumor vaccine. Interestingly, the unique properties of this HSP70i in the disruption of mitochondrial function and the inhibition of proteostasis both contributed to DAMP release. This HSP70i constitutes a promising therapeutic opportunity in colorectal cancer and may exhibit antitumor activity against other tumor types. SIGNIFICANCE: These findings describe a novel HSP70i that disrupts mitochondrial proteostasis, demonstrating single-agent efficacy that induces immunogenic cell death in treated tumors.
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Affiliation(s)
- Thibaut Barnoud
- Program in Molecular and Cellular Oncogenesis, The Wistar Institute, Philadelphia, Pennsylvania
| | - Jessica C Leung
- Program in Molecular and Cellular Oncogenesis, The Wistar Institute, Philadelphia, Pennsylvania
| | - Julia I-Ju Leu
- Department of Genetics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Subhasree Basu
- Program in Molecular and Cellular Oncogenesis, The Wistar Institute, Philadelphia, Pennsylvania
| | - Adi Narayana Reddy Poli
- Program in Molecular and Cellular Oncogenesis, The Wistar Institute, Philadelphia, Pennsylvania
| | - Joshua L D Parris
- Program in Molecular and Cellular Oncogenesis, The Wistar Institute, Philadelphia, Pennsylvania.,Department of Graduate Group in Cell and Molecular Biology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Alexandra Indeglia
- Program in Molecular and Cellular Oncogenesis, The Wistar Institute, Philadelphia, Pennsylvania.,Department of Biochemistry and Molecular Biophysics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Tetyana Martynyuk
- Program in Molecular and Cellular Oncogenesis, The Wistar Institute, Philadelphia, Pennsylvania
| | - Madeline Good
- Program in Molecular and Cellular Oncogenesis, The Wistar Institute, Philadelphia, Pennsylvania
| | - Keerthana Gnanapradeepan
- Program in Molecular and Cellular Oncogenesis, The Wistar Institute, Philadelphia, Pennsylvania.,Department of Biochemistry and Molecular Biophysics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Emilio Sanseviero
- Program in Immunology, Metastasis and Microenvironment, The Wistar Institute, Philadelphia, Pennsylvania
| | - Rebecca Moeller
- Drexel University College of Medicine, Philadelphia, Pennsylvania
| | - Hsin-Yao Tang
- Program in Molecular and Cellular Oncogenesis, The Wistar Institute, Philadelphia, Pennsylvania
| | - Joel Cassel
- Program in Molecular and Cellular Oncogenesis, The Wistar Institute, Philadelphia, Pennsylvania
| | - Andrew V Kossenkov
- Program in Gene Expression and Regulation, The Wistar Institute, Philadelphia, Pennsylvania
| | - Qin Liu
- Program in Molecular and Cellular Oncogenesis, The Wistar Institute, Philadelphia, Pennsylvania
| | - David W Speicher
- Program in Molecular and Cellular Oncogenesis, The Wistar Institute, Philadelphia, Pennsylvania
| | - Dmitry I Gabrilovich
- Department of Graduate Group in Cell and Molecular Biology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Joseph M Salvino
- Program in Molecular and Cellular Oncogenesis, The Wistar Institute, Philadelphia, Pennsylvania.
| | - Donna L George
- Department of Genetics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Maureen E Murphy
- Program in Molecular and Cellular Oncogenesis, The Wistar Institute, Philadelphia, Pennsylvania.
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13
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Proietti I, Skroza N, Bernardini N, Tolino E, Balduzzi V, Marchesiello A, Michelini S, Volpe S, Mambrin A, Mangino G, Romeo G, Maddalena P, Rees C, Potenza C. Mechanisms of Acquired BRAF Inhibitor Resistance in Melanoma: A Systematic Review. Cancers (Basel) 2020; 12:E2801. [PMID: 33003483 PMCID: PMC7600801 DOI: 10.3390/cancers12102801] [Citation(s) in RCA: 65] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Revised: 09/21/2020] [Accepted: 09/25/2020] [Indexed: 12/18/2022] Open
Abstract
This systematic review investigated the literature on acquired v-raf murine sarcoma viral oncogene homolog B1 (BRAF) inhibitor resistance in patients with melanoma. We searched MEDLINE for articles on BRAF inhibitor resistance in patients with melanoma published since January 2010 in the following areas: (1) genetic basis of resistance; (2) epigenetic and transcriptomic mechanisms; (3) influence of the immune system on resistance development; and (4) combination therapy to overcome resistance. Common resistance mutations in melanoma are BRAF splice variants, BRAF amplification, neuroblastoma RAS viral oncogene homolog (NRAS) mutations and mitogen-activated protein kinase kinase 1/2 (MEK1/2) mutations. Genetic and epigenetic changes reactivate previously blocked mitogen-activated protein kinase (MAPK) pathways, activate alternative signaling pathways, and cause epithelial-to-mesenchymal transition. Once BRAF inhibitor resistance develops, the tumor microenvironment reverts to a low immunogenic state secondary to the induction of programmed cell death ligand-1. Combining a BRAF inhibitor with a MEK inhibitor delays resistance development and increases duration of response. Multiple other combinations based on known mechanisms of resistance are being investigated. BRAF inhibitor-resistant cells develop a range of 'escape routes', so multiple different treatment targets will probably be required to overcome resistance. In the future, it may be possible to personalize combination therapy towards the specific resistance pathway in individual patients.
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Affiliation(s)
- Ilaria Proietti
- Dermatology Unit “Daniele Innocenzi”, Department of Medical-Surgical Sciences and Bio-Technologies, Sapienza University of Rome, Fiorini Hospital, Polo Pontino, 04019 Terracina, Italy; (N.S.); (N.B.); (E.T.); (V.B.); (A.M.); (S.M.); (S.V.); (A.M.); (P.M.); (C.P.)
| | - Nevena Skroza
- Dermatology Unit “Daniele Innocenzi”, Department of Medical-Surgical Sciences and Bio-Technologies, Sapienza University of Rome, Fiorini Hospital, Polo Pontino, 04019 Terracina, Italy; (N.S.); (N.B.); (E.T.); (V.B.); (A.M.); (S.M.); (S.V.); (A.M.); (P.M.); (C.P.)
| | - Nicoletta Bernardini
- Dermatology Unit “Daniele Innocenzi”, Department of Medical-Surgical Sciences and Bio-Technologies, Sapienza University of Rome, Fiorini Hospital, Polo Pontino, 04019 Terracina, Italy; (N.S.); (N.B.); (E.T.); (V.B.); (A.M.); (S.M.); (S.V.); (A.M.); (P.M.); (C.P.)
| | - Ersilia Tolino
- Dermatology Unit “Daniele Innocenzi”, Department of Medical-Surgical Sciences and Bio-Technologies, Sapienza University of Rome, Fiorini Hospital, Polo Pontino, 04019 Terracina, Italy; (N.S.); (N.B.); (E.T.); (V.B.); (A.M.); (S.M.); (S.V.); (A.M.); (P.M.); (C.P.)
| | - Veronica Balduzzi
- Dermatology Unit “Daniele Innocenzi”, Department of Medical-Surgical Sciences and Bio-Technologies, Sapienza University of Rome, Fiorini Hospital, Polo Pontino, 04019 Terracina, Italy; (N.S.); (N.B.); (E.T.); (V.B.); (A.M.); (S.M.); (S.V.); (A.M.); (P.M.); (C.P.)
| | - Anna Marchesiello
- Dermatology Unit “Daniele Innocenzi”, Department of Medical-Surgical Sciences and Bio-Technologies, Sapienza University of Rome, Fiorini Hospital, Polo Pontino, 04019 Terracina, Italy; (N.S.); (N.B.); (E.T.); (V.B.); (A.M.); (S.M.); (S.V.); (A.M.); (P.M.); (C.P.)
| | - Simone Michelini
- Dermatology Unit “Daniele Innocenzi”, Department of Medical-Surgical Sciences and Bio-Technologies, Sapienza University of Rome, Fiorini Hospital, Polo Pontino, 04019 Terracina, Italy; (N.S.); (N.B.); (E.T.); (V.B.); (A.M.); (S.M.); (S.V.); (A.M.); (P.M.); (C.P.)
| | - Salvatore Volpe
- Dermatology Unit “Daniele Innocenzi”, Department of Medical-Surgical Sciences and Bio-Technologies, Sapienza University of Rome, Fiorini Hospital, Polo Pontino, 04019 Terracina, Italy; (N.S.); (N.B.); (E.T.); (V.B.); (A.M.); (S.M.); (S.V.); (A.M.); (P.M.); (C.P.)
| | - Alessandra Mambrin
- Dermatology Unit “Daniele Innocenzi”, Department of Medical-Surgical Sciences and Bio-Technologies, Sapienza University of Rome, Fiorini Hospital, Polo Pontino, 04019 Terracina, Italy; (N.S.); (N.B.); (E.T.); (V.B.); (A.M.); (S.M.); (S.V.); (A.M.); (P.M.); (C.P.)
| | - Giorgio Mangino
- Department of Medico-Surgical Sciences and Biotechnologies, Sapienza University of Rome, 00185 Rome, Italy; (G.M.); (G.R.)
| | - Giovanna Romeo
- Department of Medico-Surgical Sciences and Biotechnologies, Sapienza University of Rome, 00185 Rome, Italy; (G.M.); (G.R.)
- Department of Infectious, Parasitic and Immune-Mediated Diseases, Istituto Superiore di Sanità, 00185 Rome, Italy
- Institute of Molecular Biology and Pathology, Consiglio Nazionale delle Ricerche, 00185 Rome, Italy
| | - Patrizia Maddalena
- Dermatology Unit “Daniele Innocenzi”, Department of Medical-Surgical Sciences and Bio-Technologies, Sapienza University of Rome, Fiorini Hospital, Polo Pontino, 04019 Terracina, Italy; (N.S.); (N.B.); (E.T.); (V.B.); (A.M.); (S.M.); (S.V.); (A.M.); (P.M.); (C.P.)
| | | | - Concetta Potenza
- Dermatology Unit “Daniele Innocenzi”, Department of Medical-Surgical Sciences and Bio-Technologies, Sapienza University of Rome, Fiorini Hospital, Polo Pontino, 04019 Terracina, Italy; (N.S.); (N.B.); (E.T.); (V.B.); (A.M.); (S.M.); (S.V.); (A.M.); (P.M.); (C.P.)
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14
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Chamazulene-Rich Artemisia arborescens Essential Oils Affect the Cell Growth of Human Melanoma Cells. PLANTS 2020; 9:plants9081000. [PMID: 32781664 PMCID: PMC7464588 DOI: 10.3390/plants9081000] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Revised: 07/30/2020] [Accepted: 08/01/2020] [Indexed: 02/06/2023]
Abstract
Artemisia arborescens is an aromatic shrub whose essential oils are considered a potential source of molecules with industrial and pharmaceutical interest. The chemical profile of A. arborescens essential oils (EOs) was shown to be quite variable and various chemotypes have been identified. In this study, we compared the EOs composition of A. arborescens leaves and flowers collected from four different locations in Sicily. The EOs were assayed for their antiproliferative activity against A375 human malignant melanoma cells, also testing cell viability and cell membrane integrity. The evaluation of DNA fragmentation and caspase-3 activity assay was employed for the detection of apoptosis. The expression of Bcl-2, Bax, cleaved caspase-9, PTEN (Phosphatase and tensin homolog), Hsp70 (Heat Shock Protein 70 kilodaltons) and SOD (superoxide dismutase) proteins was evaluated by Western blot analysis. The levels of ROS and GSH were also analyzed. Results show that EOs presented significant differences in their composition, yield, and cytotoxic activity depending on the collection site. The chamazulene/camphor-rich EOs from plants collected in Acqua Calda (Lipari) resulted particularly active on melanoma cancer cells (IC50 values of 6.7 and 4.5 µg/mL), being able to trigger apoptotic death probably interfering with endogenous defense mechanisms. These oils may be considered as a natural resource of chamazulene, containing this compound up to 63%.
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15
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Cardile V, Avola R, Graziano ACE, Russo A. Moscatilin, a bibenzyl derivative from the orchid Dendrobium loddigesii, induces apoptosis in melanoma cells. Chem Biol Interact 2020; 323:109075. [PMID: 32229109 DOI: 10.1016/j.cbi.2020.109075] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2020] [Revised: 03/18/2020] [Accepted: 03/25/2020] [Indexed: 02/06/2023]
Abstract
The use of orchids in herbal medicine has a very long history. Dendrobium species are known to produce a variety of secondary metabolites such as phenanthrens, bibenzyls, fluorenones and sesquiterpenes, and alkaloids and are responsible for their wide variety of medicinal properties. For decades, bibenzyls, which are the main bioactive components derived from Dendrobium species, have been subjected to extensive investigation as likely candidates for cancer treatment. The present study was undertaken to investigate the effect of moscatilin, a bibenzyl derivative from the orchid Dendrobium loddigesii on human melanoma cells. In A375 cells compound moscatilin showed a clear dose-response relationship in the range of 6.25-50 μM concentrations. In addition, we demonstrated an apoptotic response after treatment of cancer cells with this bibenzyl compound at 6.25 and 12.5 μM concentrations that probably involves PTEN activity, inhibition of Hsp70 expression and reactive oxygen species production. Alternatively, the inhibition of the caspase cascade at higher concentrations, 25 and 50 μM, correlated with additional reactive oxygen species increase, probably switched the mode of moscatilin-induced cell death from apoptosis to necrosis.
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Affiliation(s)
- Venera Cardile
- Department of Biomedical and Biotechnological Sciences, Section of Physiology, University of Catania, Via S. Sofia, 89, 95123, Catania, Italy
| | - Rosanna Avola
- Department of Biomedical and Biotechnological Sciences, Section of Physiology, University of Catania, Via S. Sofia, 89, 95123, Catania, Italy
| | - Adriana C E Graziano
- Department of Biomedical and Biotechnological Sciences, Section of Physiology, University of Catania, Via S. Sofia, 89, 95123, Catania, Italy
| | - Alessandra Russo
- Department of Drug Sciences, University of Catania, Via S. Sofia 64, 95125, Catania, Italy.
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16
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Combination of Anti-Cancer Drugs with Molecular Chaperone Inhibitors. Int J Mol Sci 2019; 20:ijms20215284. [PMID: 31652993 PMCID: PMC6862641 DOI: 10.3390/ijms20215284] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2019] [Revised: 10/21/2019] [Accepted: 10/22/2019] [Indexed: 12/15/2022] Open
Abstract
Most molecular chaperones belonging to heat shock protein (HSP) families are known to protect cancer cells from pathologic, environmental and pharmacological stress factors and thereby can hamper anti-cancer therapies. In this review, we present data on inhibitors of the heat shock response (particularly mediated by the chaperones HSP90, HSP70, and HSP27) either as a single treatment or in combination with currently available anti-cancer therapeutic approaches. An overview of the current literature reveals that the co-administration of chaperone inhibitors and targeting drugs results in proteotoxic stress and violates the tumor cell physiology. An optimal drug combination should simultaneously target cytoprotective mechanisms and trigger the imbalance of the tumor cell physiology.
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17
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Heat Shock Proteins Are Essential Components in Transformation and Tumor Progression: Cancer Cell Intrinsic Pathways and Beyond. Int J Mol Sci 2019; 20:ijms20184507. [PMID: 31514477 PMCID: PMC6769451 DOI: 10.3390/ijms20184507] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2019] [Revised: 09/06/2019] [Accepted: 09/07/2019] [Indexed: 02/08/2023] Open
Abstract
Heat shock protein (HSP) synthesis is switched on in a remarkably wide range of tumor cells, in both experimental animal systems and in human cancer, in which these proteins accumulate in high levels. In each case, elevated HSP concentrations bode ill for the patient, and are associated with a poor outlook in terms of survival in most cancer types. The significance of elevated HSPs is underpinned by their essential roles in mediating tumor cell intrinsic traits such as unscheduled cell division, escape from programmed cell death and senescence, de novo angiogenesis, and increased invasion and metastasis. An increased HSP expression thus seems essential for tumorigenesis. Perhaps of equal significance is the pronounced interplay between cancer cells and the tumor milieu, with essential roles for intracellular HSPs in the properties of the stromal cells, and their roles in programming malignant cells and in the release of HSPs from cancer cells to influence the behavior of the adjacent tumor and infiltrating the normal cells. These findings of a triple role for elevated HSP expression in tumorigenesis strongly support the targeting of HSPs in cancer, especially given the role of such stress proteins in resistance to conventional therapies.
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18
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Feng J, Zhan Y, Zhang Y, Zheng H, Wang W, Fan S. Increased expression of heat shock protein (HSP) 10 and HSP70 correlates with poor prognosis of nasopharyngeal carcinoma. Cancer Manag Res 2019; 11:8219-8227. [PMID: 31564980 PMCID: PMC6735532 DOI: 10.2147/cmar.s218427] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2019] [Accepted: 08/05/2019] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Heat shock proteins (HSPs) are a large family of chaperones implicating in occurrence and progression of tumor. In our previous study, we found HSP10 correlates with poor prognosis of oral squamous cell carcinoma and astrocytoma. HSP70 is also an important part of this family and whether the alterations of HSP10 and HSP70 expression and their common expression correlates with carcinogenesis and progression of nasopharyngeal carcinoma (NPC) has not been reported. METHOD In this study, we investigate the correlation between the expression of HSP10 and HSP70 and clinicopathological characteristics in NPC by immunohistochemistry (IHC). RESULTS Results indicated that positive expression of HSP10 and HSP70 was higher in NPC tissues (both P<0.001). Positive expression of HSP10 and HSP70 proteins, and common positive expression of the two HSPs analyzed in advanced clinical stages were higher than that in early clinical stages (All P<0.05). There was significantly higher expression of HSP10, HSP70, and common expression in NPC with LNM (lymph node metastasis) compared with NPC without LNM (All P<0.05). Interestingly, positive expression of HSP10 and HSP70 proteins and common expression had an evidently inverse correlation with survival status (All P<0.05). Spearman's correlation analysis showed expression of HSP10 was positively associated with HSP70 (r=0.407, P<0 0.001). Kaplan-Meier analysis showed that the overall survival rates for NPC patients with positive expression of HSP10 and HSP70 and common expression were significantly lower than these patients with negative expression (All P<0.05). Furthermore, positive expression of HSP10 and HSP70 proteins was identified as independent poor prognostic factors for NPC patients (both P<0.05) by Cox regression analysis. CONCLUSION In conclusion, HSP10 and HSP70 can serve as the poor prognostic factors for NPC patients.
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Affiliation(s)
- Juan Feng
- Department of Pathology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, People’s Republic of China
- Clinical Laboratory of Hunan Prevention and Treatment Institute for Occupational Diseases, Changsha, Hunan, People’s Republic of China
| | - Yuting Zhan
- Department of Pathology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, People’s Republic of China
| | - Yuting Zhang
- Department of Pathology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, People’s Republic of China
| | - Hongmei Zheng
- Department of Pathology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, People’s Republic of China
| | - Weiyuan Wang
- Department of Pathology, Xiangya Hospital, Central South University, Changsha, Hunan, People’s Republic of China
| | - Songqing Fan
- Department of Pathology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, People’s Republic of China
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19
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Russo A, Cardile V, Avola R, Graziano A, Montenegro I, Said B, Madrid A. Isocordoin analogues promote apoptosis in human melanoma cells via Hsp70. Phytother Res 2019; 33:3242-3250. [PMID: 31489735 DOI: 10.1002/ptr.6498] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2019] [Revised: 08/12/2019] [Accepted: 08/20/2019] [Indexed: 12/12/2022]
Abstract
Isocordin 1 and a series of 4-oxyalkyl-isocordoin analogues 2-8 were evaluated for their cytotoxicity effect against human melanoma cells (A2058). Analogues 4, 5, and 6 showed a higher inhibitory activity with IC50 values of 12.91 ± 0.031, 24.88 ± 0.013, and 11.62 ± 0.017, respectively. These analogues, 4, 5, and 6, also induced an apoptotic response at 12.5- and 25-μM concentrations. They inhibited the expression of antiapoptotic proteins Bcl-2 and Hsp70, a critical factor that promotes tumour cell survival. In contrast, Bax and caspase-9 expression, and caspase-3 enzyme resulted activated. These results were correlated to a DNA fragmentation typical of apoptosis and an increase of intracellular reactive oxygen species (ROS) levels. Alternatively, at higher concentration (50 μM), when the capacity of the cells to sustain Hsp70 synthesis is reduced, our results seem to indicate that necrosis was induced by a further increase in ROS production. Therefore, the central finding in the present study is that these molecules downregulates Hsp70 expression. Altogether, these results suggest that 4-oxyalkyl-isocordoin analogues 4, 5, and 6 deserve to be deeply investigated for a possible application as Hsp70 inhibitor in the management of melanoma.
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Affiliation(s)
- Alessandra Russo
- Department of Drug Sciences, University of Catania, Catania, Italy
| | - Venera Cardile
- Department of Biomedical and Biotechnological Sciences, University of Catania, Catania, Italy
| | - Rosanna Avola
- Department of Biomedical and Biotechnological Sciences, University of Catania, Catania, Italy
| | - Adriana Graziano
- Department of Biomedical and Biotechnological Sciences, University of Catania, Catania, Italy
| | - Iván Montenegro
- Escuela de Obstetricia y Puericultura, Facultad de Medicina, Campus de la Salud, Universidad de Valparaíso, Viña del Mar, Chile
| | - Bastian Said
- Departamento de Química, Universidad Técnica Federico Santa María, Santiago, Chile
| | - Alejandro Madrid
- Laboratorio de Productos Naturales y Síntesis Orgánica (LPNSO), Departamento de Química, Facultad de Ciencias Naturales y Exactas, Universidad de Playa Ancha, Valparaíso, Chile
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20
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Antigrowth activity and induction of apoptosis in human melanoma cells by Drymis winteri forst extract and its active components. Chem Biol Interact 2019; 305:79-85. [DOI: 10.1016/j.cbi.2019.03.029] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2019] [Revised: 03/15/2019] [Accepted: 03/26/2019] [Indexed: 12/14/2022]
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21
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Labrie M, Fang Y, Kendsersky ND, Li J, Liang H, Westin SN, Mitri Z, Mills GB. Using Reverse Phase Protein Array (RPPA) to Identify and Target Adaptive Resistance. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2019; 1188:251-266. [PMID: 31820393 PMCID: PMC7382818 DOI: 10.1007/978-981-32-9755-5_14] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Tumor cells and the tumor ecosystem rapidly evolve in response to therapy. This tumor evolution results in the rapid emergence of drug resistance that limits the magnitude and duration of response to therapy including chemotherapy, targeted therapy, and immunotherapy. Thus, there is an urgent need to understand and interdict tumor evolution to improve patient benefit to therapy. Reverse phase protein array (RPPA) provides a powerful tool to evaluate and develop approaches to target the processes underlying one form of tumor evolution: adaptive evolution. Tumor cells and the tumor microenvironment rapidly evolve through rewiring of protein networks to bypass the effects of therapy. In this review, we present the concepts underlying adaptive resistance and use of RPPA in understanding resistance mechanisms and identification of effective drug combinations. We further demonstrate that this novel information is resulting in biomarker-driven trials aimed at targeting adaptive resistance and improving patient outcomes.
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Affiliation(s)
- Marilyne Labrie
- Knight Cancer Institute, Oregon Health and Sciences University, Portland, OR, USA.
| | - Yong Fang
- Knight Cancer Institute, Oregon Health and Sciences University, Portland, OR, USA
| | | | - Jun Li
- Department of Gynecological Oncology, The University of Texas M.D. Anderson Cancer Center, Houston, TX, USA
| | - Han Liang
- Department of Gynecological Oncology, The University of Texas M.D. Anderson Cancer Center, Houston, TX, USA
| | - Shannon N Westin
- Department of Bioinformatics and Computational Biology, The University of Texas M.D. Anderson Cancer Center, Houston, TX, USA
| | - Zahi Mitri
- Knight Cancer Institute, Oregon Health and Sciences University, Portland, OR, USA
| | - Gordon B Mills
- Knight Cancer Institute, Oregon Health and Sciences University, Portland, OR, USA
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22
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Sheng L, Tang T, Liu Y, Ma Y, Wang Z, Tao H, Zhang Y, Qi Z. Inducible HSP70 antagonizes cisplatin‑induced cell apoptosis through inhibition of the MAPK signaling pathway in HGC‑27 cells. Int J Mol Med 2018; 42:2089-2097. [PMID: 30066840 PMCID: PMC6108861 DOI: 10.3892/ijmm.2018.3789] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Accepted: 07/11/2018] [Indexed: 12/22/2022] Open
Abstract
Inducible heat shock protein 70 (HSP70; also known as HSPA1 or HSP72) is implicated in cancer. As a stress-inducible heat shock protein, HSP70 is highly expressed in a variety of cancers and correlates with metastasis, chemotherapy resistance and tumor prognosis. The present study demonstrated that suppression of HSP70 through the specific inhibitor pifithrin-µ or by HSP70 knockdown enhanced cisplatin-induced apoptosis in HGC-27 gastric cancer cells. By contrast, upregulation of HSP70 through transfection of a HSP70 overexpressing plasmid decreased cisplatin-induced HGC-27 cell apoptosis. In exploring the underlying molecular mechanisms, the present results revealed that HSP70 antagonized cisplatin-induced HGC-27 cell apoptosis by regulating the mitogen-activated protein kinase (MAPK) signaling pathway. In addition, suppressing the MAPK pathway enhanced cisplatin-induced HGC-27 cell apoptosis. Collectively, the present findings suggest that inhibition of HSP70 expression enhanced the sensitivity of HGC-27 cells to cisplatin via the MAPK signaling pathway, and that HSP70 may serve as a potential therapeutic target in gastric cancer.
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Affiliation(s)
- Lili Sheng
- Department of Oncology, Yijishan Hospital, Wannan Medical College, Wuhu, Anhui 241002, P.R. China
| | - Tuo Tang
- Anhui Province Key Laboratory of Active Biological Macromolecules, Wannan Medical College, Wuhu, Anhui 241002, P.R. China
| | - Yinhua Liu
- Department of Pathology, Yijishan Hospital, Wannan Medical College, Wuhu, Anhui 241002, P.R. China
| | - Yunfei Ma
- Anhui Province Key Laboratory of Active Biological Macromolecules, Wannan Medical College, Wuhu, Anhui 241002, P.R. China
| | - Ziqian Wang
- Anhui Province Key Laboratory of Active Biological Macromolecules, Wannan Medical College, Wuhu, Anhui 241002, P.R. China
| | - Hong Tao
- Anhui Province Key Laboratory of Active Biological Macromolecules, Wannan Medical College, Wuhu, Anhui 241002, P.R. China
| | - Yao Zhang
- Anhui Province Key Laboratory of Active Biological Macromolecules, Wannan Medical College, Wuhu, Anhui 241002, P.R. China
| | - Zhilin Qi
- Anhui Province Key Laboratory of Active Biological Macromolecules, Wannan Medical College, Wuhu, Anhui 241002, P.R. China
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Qi Z, Tang T, Sheng L, Ma Y, Liu Y, Yan L, Qi S, Ling L, Zhang Y. Salidroside inhibits the proliferation and migration of gastric cancer cells via suppression of Src‑associated signaling pathway activation and heat shock protein 70 expression. Mol Med Rep 2018; 18:147-156. [PMID: 29749547 PMCID: PMC6059663 DOI: 10.3892/mmr.2018.8958] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2017] [Accepted: 04/09/2018] [Indexed: 12/02/2022] Open
Abstract
Salidroside, an active ingredient extracted from the Rhodiola rosea plant, has potential anti-tumor effects. However, the effects of salidroside on gastric cancer cell proliferation and migration remain unclear. In the present study, the inhibitory effects of salidroside on gastric cancer cell proliferation, migration and invasion and the molecular mechanisms underlying these effects were investigated. The human gastric cancer cell line, BGC-823, was treated with different concentrations of salidroside (200, 400 and 600 µg/ml). Cell proliferation was determined with Cell Counting Kit-8 and colony formation assays, and the migration and invasion of cells was detected by a wound healing and Transwell assay, respectively. Western blotting was performed to detect the levels of N-cadherin, E-cadherin and heat shock protein (HSP)70. In addition, the phosphorylation of proto-oncogene tyrosine-protein kinase Src (Src), protein kinase B (Akt), mitogen activated protein kinase 1 (ERK), signal transducer and activator of transcription (STAT)3 and focal adhesion kinase 1 (FAK) was examined by western blotting. The levels of matrix metalloproteinase (MMP)-2 and MMP-9 were determined by enzyme-linked immunosorbent assay kits. Levels of reactive oxygen species (ROS) in cells were measured by a fluorescence plate reader with dichloro-dihydro-fluorescein diacetate. The results indicated that salidroside significantly suppressed cell proliferation and colony formation, inhibited cell migration and invasion, increased E-cadherin expression and decreased N-cadherin, MMP-2 and MMP-9 expression. Furthermore, salidroside suppressed ROS production and subsequently reduced the phosphorylation of Src, Akt, ERK and FAK. Salidroside also inhibited HSP70 expression, and HSP70 overexpression reversed the inhibitory effects of salidroside on BGC-823 cell proliferation, migration and invasion. In conclusion, the present study revealed that salidroside inhibited the proliferation, migration and invasion of BGC-823 cells by downregulating ROS-mediated Src-associated signaling pathway activation and HSP70 expression.
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Affiliation(s)
- Zhilin Qi
- Department of Biochemistry, Wannan Medical College, Wuhu, Anhui 241002, P.R. China
| | - Tuo Tang
- Anhui Province Key Laboratory of Active Biological Macromolecules, Wannan Medical College, Wuhu, Anhui 241002, P.R. China
| | - Lili Sheng
- Department of Oncology, Yijishan Hospital, Wannan Medical College, Wuhu, Anhui 241002, P.R. China
| | - Yunfei Ma
- Anhui Province Key Laboratory of Active Biological Macromolecules, Wannan Medical College, Wuhu, Anhui 241002, P.R. China
| | - Yinhua Liu
- Department of Pathology, Yijishan Hospital, Wannan Medical College, Wuhu, Anhui 241002, P.R. China
| | - Liang Yan
- Department of Biochemistry, Wannan Medical College, Wuhu, Anhui 241002, P.R. China
| | - Shimei Qi
- Department of Biochemistry, Wannan Medical College, Wuhu, Anhui 241002, P.R. China
| | - Liefeng Ling
- Department of Biochemistry, Wannan Medical College, Wuhu, Anhui 241002, P.R. China
| | - Yao Zhang
- Department of Biochemistry, Wannan Medical College, Wuhu, Anhui 241002, P.R. China
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Inhibition of stress-inducible HSP70 impairs mitochondrial proteostasis and function. Oncotarget 2018; 8:45656-45669. [PMID: 28484090 PMCID: PMC5542216 DOI: 10.18632/oncotarget.17321] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2017] [Accepted: 04/03/2017] [Indexed: 12/20/2022] Open
Abstract
Protein quality control is an important component of survival for all cells. The use of proteasome inhibitors for cancer therapy derives from the fact that tumor cells generally exhibit greater levels of proteotoxic stress than do normal cells, and thus cancer cells tend to be more sensitive to proteasome inhibition. However, this approach has been limited in some cases by toxicity to normal cells. Recently, the concept of inhibiting proteostasis in organelles for cancer therapy has been advanced, in part because it is predicted to have reduced toxicity for normal cells. Here we demonstrate that a fraction of the major stress-induced chaperone HSP70 (also called HSPA1A or HSP72, but hereafter HSP70) is abundantly present in mitochondria of tumor cells, but is expressed at quite low or undetectable levels in mitochondria of most normal tissues and non-tumor cell lines. We show that treatment of tumor cells with HSP70 inhibitors causes a marked change in mitochondrial protein quality control, loss of mitochondrial membrane potential, reduced oxygen consumption rate, and loss of ATP production. We identify several nuclear-encoded mitochondrial proteins, including polyadenylate binding protein-1 (PABPC1), which exhibit decreased abundance in mitochondria following treatment with HSP70 inhibitors. We also show that targeting HSP70 function leads to reduced levels of several mitochondrial-encoded RNA species that encode components of the electron transport chain. Our data indicate that small molecule inhibitors of HSP70 represent a new class of organelle proteostasis inhibitors that impair mitochondrial function in cancer cells, and therefore constitute novel therapeutics.
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25
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Cardile V, Avola R, Graziano A, Piovano M, Russo A. Cytotoxicity of demalonyl thyrsiflorin A, a semisynthetic labdane-derived diterpenoid, to melanoma cells. Toxicol In Vitro 2018; 47:274-280. [DOI: 10.1016/j.tiv.2017.12.012] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2017] [Revised: 11/24/2017] [Accepted: 12/15/2017] [Indexed: 12/12/2022]
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Lipid bodies containing oxidatively truncated lipids block antigen cross-presentation by dendritic cells in cancer. Nat Commun 2017; 8:2122. [PMID: 29242535 PMCID: PMC5730553 DOI: 10.1038/s41467-017-02186-9] [Citation(s) in RCA: 172] [Impact Index Per Article: 24.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2017] [Accepted: 11/08/2017] [Indexed: 01/15/2023] Open
Abstract
Cross-presentation is a critical function of dendritic cells (DCs) required for induction of antitumor immune responses and success of cancer immunotherapy. It is established that tumor-associated DCs are defective in their ability to cross-present antigens. However, the mechanisms driving these defects are still unknown. We find that impaired cross-presentation in DCs is largely associated with defect in trafficking of peptide-MHC class I (pMHC) complexes to the cell surface. DCs in tumor-bearing hosts accumulate lipid bodies (LB) containing electrophilic oxidatively truncated (ox-tr) lipids. These ox-tr-LB, but not LB present in control DCs, covalently bind to chaperone heat shock protein 70. This interaction prevents the translocation of pMHC to cell surface by causing the accumulation of pMHC inside late endosomes/lysosomes. As a result, tumor-associated DCs are no longer able to stimulate adequate CD8 T cells responses. In conclusion, this study demonstrates a mechanism regulating cross-presentation in cancer and suggests potential therapeutic avenues.
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27
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Domingo-Musibay E, Heun JM, Nevala WK, Callstrom M, Atwell T, Galanis E, Erickson LA, Markovic SN. Endogenous Heat-Shock Protein Induction with or Without Radiofrequency Ablation or Cryoablation in Patients with Stage IV Melanoma. Oncologist 2017; 22:1026-e93. [PMID: 28679643 PMCID: PMC5599201 DOI: 10.1634/theoncologist.2017-0060] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2017] [Accepted: 05/09/2017] [Indexed: 12/15/2022] Open
Abstract
Lessons Learned. Percutaneous thermal ablation combined with in situ granulocyte‐macrophage colony‐stimulating factor cytokine therapy was technically feasible and well tolerated. No significant clinical or immunologic responses were seen.
Background. Melanoma tumor‐derived heat‐shock proteins (HSPs) and HSP‐peptide complexes can elicit protective antitumor responses. The granulocyte‐macrophage colony‐stimulating factor (GM‐CSF) chemokine can also promote uptake and processing by professional antigen presenting cells (APCs). On this basis, we designed a pilot study of percutaneous thermal ablation as a means to induce heat‐shock protein vaccination plus GM‐CSF to determine safety and preliminary antitumor activity of this combination. Materials and Methods. This study was designed to assess overall safety of percutaneous ablation combined with GM‐CSF for unresectable, metastatic melanoma including uveal and mucosal types. All patients received heat‐shock therapy (42°C for 30 minutes), then received one of three treatments: (a) intralesional GM‐CSF (500 mcg standard dose); (b) radiofrequency ablation (RFA) + GM‐CSF; or (c) cryoablation plus GM‐CSF. The primary endpoint of the study was the induction of endogenous HSP70 and melanoma‐specific cytotoxic T lymphocytes (CTL). Results. Nine patients (three per study arm) were enrolled. No dose‐limiting toxicity was observed as specified per protocol. All patients developed progressive disease and went on to receive alternative therapy. Median overall survival (OS) was 8.2 months (95% confidence interval [CI] 2–17.2). The study was not powered to detect a difference in clinical outcome among treatment groups. Conclusion. Percutaneous thermal ablation plus GM‐CSF was well tolerated, technically feasible, and demonstrated an acceptable adverse event profile comparable to conventional RFA and cryoablation. While HSP70 was induced following therapy, the degree of HSP70 elevation was not associated with clinical outcome or induced CTL responses. While percutaneous thermal ablation plus GM‐CSF combinations including checkpoint inhibitors could be considered in future studies, the use of GM‐CSF remains experimental and for use in the context of clinical trials.
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Affiliation(s)
- Evidio Domingo-Musibay
- Mayo Clinic, Rochester, Minnesota, USA
- Division of Hematology, Oncology and Transplantation, University of Minnesota, Minneapolis, Minnesota, USA
| | - James M Heun
- Mayo Clinic, Rochester, Minnesota, USA
- Dean Clinic, Madison, Wisconsin, USA
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28
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Potential therapeutic targets of epithelial-mesenchymal transition in melanoma. Cancer Lett 2017; 391:125-140. [PMID: 28131904 DOI: 10.1016/j.canlet.2017.01.029] [Citation(s) in RCA: 107] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2016] [Revised: 01/02/2017] [Accepted: 01/18/2017] [Indexed: 12/16/2022]
Abstract
Melanoma is a cutaneous neoplastic growth of melanocytes with great potential to invade and metastasize, especially when not treated early and effectively. Epithelial-mesenchymal transition (EMT) is the process by which melanocytes lose their epithelial characteristics and acquire mesenchymal phenotypes. Mesenchymal protein expression increases the motility, invasiveness, and metastatic potential of melanoma. Many pathways play a role in promotion of mesenchymal protein expression including RAS/RAF/MEK/ERK, PI3K/AKT/mTOR, Wnt/β-catenin, and several others. Downstream effectors of these pathways induce expression of EMT transcription factors including Snail, Slug, Twist, and Zeb that promote repression of epithelial and induction of mesenchymal character. Emerging research has demonstrated that a variety of small molecule inhibitors as well as phytochemicals can influence the progression of EMT and may even reverse the process, inducing re-expression of epithelial markers. Phytochemicals are of particular interest as supplementary treatment options because of their relatively low toxicities and anti-EMT properties. Modulation of EMT signaling pathways using synthetic small molecules and phytochemicals is a potential therapeutic strategy for reducing the aggressive progression of metastatic melanoma. In this review, we discuss the emerging pathways and transcription factor targets that regulate EMT and evaluate potential synthetic small molecules and naturally occurring compounds that may reduce metastatic melanoma progression.
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