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Wang XQ, Brown JM, Lorimer S, Jones KB, Groundland JS. Thermal necrosis in orthopedic bone tumors: experimental research. Ann Med Surg (Lond) 2023; 85:4372-4377. [PMID: 37663713 PMCID: PMC10473360 DOI: 10.1097/ms9.0000000000001052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Accepted: 07/02/2023] [Indexed: 09/05/2023] Open
Abstract
Introduction The extent of surgical resection in orthopedic oncology differs according to tumor biology. While malignant bone tumors are operatively managed with wide resection, benign bone tumors and metastatic carcinomas are often treated through intralesional excision and adjuvant modalities, including the elimination of residual neoplastic cells through thermal necrosis. This study investigates in vitro temperature thresholds for thermal necrosis in common orthopedic bone tumors. Methodology Eleven cell lines, including metastatic carcinomas to bone (A549, A498, FU-UR-1, PC3, MDA-MB-231, TT, MCF7, and K1), giant cell tumor of bone, osteosarcoma (HG-63), and control non-neoplastic cells (HEK293) were cultured. Cells were exposed to thermal stress at varying times and temperatures and evaluated for survival and viability with crystal violet and MTT assays. Results Both the MTT and crystal violet assay demonstrated statistically superior rates of viability and survival for A549 (lung carcinoma), FU-UR-1 (renal carcinoma), K1 (thyroid carcinoma), and MG-63 (osteosarcoma) cell lines compared to control (HEK293 cells) at 60°C. Additionally, the MTT assay demonstrated superior viability for PC3 (prostate carcinoma), MCF7 (breast carcinoma), and A498 (renal carcinoma) compared to control. All cell lines demonstrated significantly decreased survival and viability in temperatures more than 90°C. Conclusion This study demonstrated in vitro thresholds for thermal necrosis for cell lines of common orthopedic tumors of bone. The A549 (lung carcinoma), K1 (thyroid carcinoma), and FU-UR-1 (renal carcinoma) cell lines demonstrated greater resistance to heat stress compared to non-neoplastic control cells. Temperatures in excess of 90°C are necessary to reliably reduce cell survival and viability to less than 10%.
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Affiliation(s)
- Xue Qi Wang
- Department of Interdisciplinary Oncology, Faculty of Medicine, University of British Columbia, Vancouver, British Columbia, Canada
| | - Jeffrey M. Brown
- Department of Orthopedics, Huntsman Cancer Institute at the University of Utah, Salt Lake City, Utah
- University of Miami Miller School of Medicine, Miami, Florida, USA
| | - Shannon Lorimer
- Department of Orthopedics, Huntsman Cancer Institute at the University of Utah, Salt Lake City, Utah
| | - Kevin B. Jones
- Department of Orthopedics, Huntsman Cancer Institute at the University of Utah, Salt Lake City, Utah
| | - John S. Groundland
- Department of Orthopedics, Huntsman Cancer Institute at the University of Utah, Salt Lake City, Utah
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2
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Guo X, Zhang M, Qin J, Li Z, Rankl C, Jiang X, Zhang B, Wang D, Tang J. Revealing the Effect of Photothermal Therapy on Human Breast Cancer Cells: A Combined Study from Mechanical Properties to Membrane HSP70. ACS APPLIED MATERIALS & INTERFACES 2023; 15:21965-21973. [PMID: 37127843 DOI: 10.1021/acsami.3c02964] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Hyperthermia-induced overexpression of heat shock protein 70 (HSP70) leads to the thermoresistance of cancer cells and reduces the efficiency of photothermal therapy (PTT). In contrast, cancer cell-specific membrane-associated HSP70 has been proven to activate antitumor immune responses. The dual effect of HSP70 on cancer cells inspires us that in-depth research of membrane HSP70 (mHSP70) during PTT treatment is essential. In this work, a PTT treatment platform for human breast cancer cells (MCF-7 cells) based on a mPEG-NH2-modified polydopamine (PDA)-coated gold nanorod core-shell structure (GNR@PDA-PEG) is developed. Using the force-distance curve-based atomic force microscopy (FD-based AFM), we gain insight into the PTT-induced changes in the morphology, mechanical properties, and mHSP70 expression and distribution of individual MCF-7 cells with high-resolution at the single-cell level. PTT treatment causes pseudopod contraction of MCF-7 cells and generates a high level of intracellular reactive oxygen species, which severely disrupt the cytoskeleton, leading to a decrease in cellular mechanical properties. The adhesion maps, which are recorded by aptamer A8 functional probes using FD-based AFM, reveal that PTT treatment causes a significant upregulation of mHSP70 expression and it starts to exhibit a partial aggregation distribution on the MCF-7 cell surface. This work not only exemplifies that AFM can be a powerful tool for detecting changes in cancer cells during PTT treatment but also provides a better view for targeting mHSP70 for cancer therapy.
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Affiliation(s)
- Xinyue Guo
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P.R. China
- University of Science and Technology of China, Hefei 230026, P.R. China
| | - Miaomiao Zhang
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P.R. China
| | - Juan Qin
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P.R. China
- University of Science and Technology of China, Hefei 230026, P.R. China
| | - Zongjia Li
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P.R. China
- University of Science and Technology of China, Hefei 230026, P.R. China
| | - Christian Rankl
- Research Center for Non-Destructive Testing GmbH, Science Park 2/2, OG, Altenberger Straße 69, A-4040 Linz, Austria
| | - Xiue Jiang
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P.R. China
- University of Science and Technology of China, Hefei 230026, P.R. China
| | - Bailin Zhang
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P.R. China
| | - Dapeng Wang
- University of Science and Technology of China, Hefei 230026, P.R. China
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
| | - Jilin Tang
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P.R. China
- University of Science and Technology of China, Hefei 230026, P.R. China
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3
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Javid H, Hashemian P, Yazdani S, Sharbaf Mashhad A, Karimi-Shahri M. The role of heat shock proteins in metastatic colorectal cancer: A review. J Cell Biochem 2022; 123:1704-1735. [PMID: 36063530 DOI: 10.1002/jcb.30326] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2022] [Revised: 08/20/2022] [Accepted: 08/24/2022] [Indexed: 01/18/2023]
Abstract
Heat shock proteins (HSPs) are a large molecular chaperone family classified by their molecular weights, including HSP27, HSP40, HSP60, HSP70, HSP90, and HSP110. HSPs are likely to have antiapoptotic properties and participate actively in various processes such as tumor cell proliferation, invasion, metastases, and death. In this review, we discuss comprehensively the functions of HSPs associated with the progression of colorectal cancer (CRC) and metastasis and resistance to cancer therapy. Taken together, HSPs have numerous clinical applications as biomarkers for cancer diagnosis and prognosis and potential therapeutic targets for CRC and its related metastases.
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Affiliation(s)
- Hossein Javid
- Department of Clinical Biochemistry, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.,Department of Medical Laboratory Sciences, Varastegan Institute for Medical Sciences, Mashhad, Iran
| | - Pedram Hashemian
- Jahad Daneshgahi Research Committee, Jahad Daneshgahi Institute, Mashhad, Iran
| | - Shaghayegh Yazdani
- Department of Medical Laboratory Sciences, Mashhad University of Medical Sciences, Mashhad, Iran.,Department of Medical Laboratory Sciences, Ilam University of Medical Sciences, Ilam, Iran
| | - Alireza Sharbaf Mashhad
- Department of Medical Laboratory Sciences, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Mehdi Karimi-Shahri
- Department of Pathology, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.,Department of Pathology, School of Medicine, Gonabad University of Medical Sciences, Gonabad, Iran
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4
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Stoll E, Hader M, Rückert M, Weissmann T, Lettmaier S, Putz F, Hecht M, Fietkau R, Rosin A, Frey B, Gaipl US. Detailed in vitro analyses of the impact of multimodal cancer therapy with hyperthermia and radiotherapy on the immune phenotype of human glioblastoma cells. Int J Hyperthermia 2022; 39:796-805. [PMID: 35676615 DOI: 10.1080/02656736.2022.2080873] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
Abstract
PURPOSE Improvements of heat-delivery systems have led to hyperthermia (HT) being increasingly recognized as an adjunct treatment modality also for brain tumors. But how HT affects the immune phenotype of glioblastoma cells is only scarcely known. MATERIALS AND METHODS We therefore investigated the effect of in vitro HT, radiotherapy (RT), and the combination of both (RHT) on cell death modalities, immune checkpoint molecule (ICM) expression and release of the danger signal HSP70 of two human glioblastoma cell lines (U87 and U251) by using multicolor flow cytometry and ELISA. Hyperthermia was performed once or twice for 60-minute sessions reaching temperatures of 39 °C, 41 °C, and 44 °C, respectively. RT was administered with 5 x 2 Gy. RESULTS A hyperthermia chamber for cell culture t-flasks regulating the temperature via a contact sensor was developed. While the glioblastoma cells were rather radioresistant, particularly in U251 cells, the combination of RT with HT significantly increased the percentage of apoptotic and necrotic cells for all temperatures examined and for both, single and double HT application. In line with that, an increased release of HSP 70 was seen only in U251 cells, mainly following treatment with HT at temperatures of 44 °C alone or in combination with RT. In contrast, immune suppressive (PD-L1, PD-L2, HVEM) and immune stimulatory (ICOS-L, CD137-L and Ox40-L) ICMs were significantly increased mostly on U87 cells, and particularly after RHT with 41 °C. CONCLUSIONS Individual assessment of the glioblastoma immune cell phenotype with regard to the planned treatment is mandatory to optimize multimodal radio-immunotherapy protocols including HT.
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Affiliation(s)
- Eileen Stoll
- Translational Radiobiology, Department of Radiation Oncology, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany.,Department of Radiation Oncology, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany.,Comprehensive Cancer Center Erlangen-EMN (CCC ER-EMN), Erlangen, Germany
| | - Michael Hader
- Translational Radiobiology, Department of Radiation Oncology, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany.,Department of Radiation Oncology, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany.,Comprehensive Cancer Center Erlangen-EMN (CCC ER-EMN), Erlangen, Germany
| | - Michael Rückert
- Translational Radiobiology, Department of Radiation Oncology, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany.,Department of Radiation Oncology, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany.,Comprehensive Cancer Center Erlangen-EMN (CCC ER-EMN), Erlangen, Germany
| | - Thomas Weissmann
- Department of Radiation Oncology, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany.,Comprehensive Cancer Center Erlangen-EMN (CCC ER-EMN), Erlangen, Germany
| | - Sebastian Lettmaier
- Department of Radiation Oncology, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany.,Comprehensive Cancer Center Erlangen-EMN (CCC ER-EMN), Erlangen, Germany
| | - Florian Putz
- Department of Radiation Oncology, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany.,Comprehensive Cancer Center Erlangen-EMN (CCC ER-EMN), Erlangen, Germany
| | - Markus Hecht
- Department of Radiation Oncology, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany.,Comprehensive Cancer Center Erlangen-EMN (CCC ER-EMN), Erlangen, Germany
| | - Rainer Fietkau
- Department of Radiation Oncology, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany.,Comprehensive Cancer Center Erlangen-EMN (CCC ER-EMN), Erlangen, Germany
| | - Andreas Rosin
- Chair for Ceramic Materials Engineering, Keylab Glastechnology, University of Bayreuth, Bayreuth, Germany
| | - Benjamin Frey
- Translational Radiobiology, Department of Radiation Oncology, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany.,Department of Radiation Oncology, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany.,Comprehensive Cancer Center Erlangen-EMN (CCC ER-EMN), Erlangen, Germany
| | - Udo S Gaipl
- Translational Radiobiology, Department of Radiation Oncology, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany.,Department of Radiation Oncology, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany.,Comprehensive Cancer Center Erlangen-EMN (CCC ER-EMN), Erlangen, Germany
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5
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Altundag EM, Yilmaz AM, Sahin A, Yilmaz BK. Combination of second-generation proteasome inhibitor Carfilzomib with Bortezomib in four different breast cancer cell lines. Anticancer Agents Med Chem 2022; 22:2909-2918. [PMID: 35352669 DOI: 10.2174/1871520622666220329175501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Revised: 01/17/2022] [Accepted: 02/16/2022] [Indexed: 11/22/2022]
Abstract
BACKGROUND Proteasome inhibitors target different pathways in cells and therefore are promising drugs in cancer therapy. The use of these inhibitors is approved mainly in hematological cancers, and recently many clinical trials and preclinical studies are running for efficacy in solid tumors. Carfilzomib is a second generation inhibitor and developed to decrease the side effects of bortezomib. Although there are many valid therapies in breast cancer, resistance and recurrence are inevitable in many cases and the proteasomal system plays an important roles in related pathways. OBJECTIVE This study is a preliminary work to evaluate the combination effects of bortezomib and carfilzomib in four different breast cancer cells. METHODS MDA-MB-231, MCF-7, UACC-2087, and SKBR-3 cell lines were used. Cell viability was determined by using bortezomib and carfilzomib alone and in combination. Combination effect values were determined using the Chou-Talalay method. Apoptosis, proteasome activity, cleaved PARP, and HSP70 expressions were analyzed in the determined doses. RESULTS The response to the combination of the two inhibitors was different in four cell lines. Apoptosis was significantly higher in combination groups compared to carfilzomib in three cell lines except SKBR-3, and higher in combination group compared to bortezomib only in UACC-2087. Combination decreased cleaved PARP levels in MDA-MB-231 and MCF-7 and increased in SKBR-3 compared to bortezomib. HSP70 levels decreased in combination with UACC-2087 and SKBR-3 compared to carfilzomib. CONCLUSION Taken together, the combination of the two inhibitors was more apoptotic compared to carfilzomib and apoptosis was higher only in UACC-2087 compared to bortezomib. This apoptosis data can not be directly correlated to degree of proteaasome inhibiton, PARP cleavage and HSP70 response.
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Affiliation(s)
- Ergul Mutlu Altundag
- Department of Biochemistry, Faculty of Medicine, Eastern Mediterranean University, via Mersin 10, 99628, Turkey
| | - Ayse Mine Yilmaz
- Genetic and Metabolic Diseases Research and Investigation Center, Marmara University, Istanbul, Turkey
| | - Ali Sahin
- Department of Biochemistry, School of Medicine, Marmara University, Istanbul, Turkey
| | - Betul Karademir Yilmaz
- Department of Biochemistry, School of Medicine, Marmara University, 34854, Istanbul, Turkey
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6
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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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7
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Alsherbiny MA, Bhuyan DJ, Radwan I, Chang D, Li CG. Metabolomic Identification of Anticancer Metabolites of Australian Propolis and Proteomic Elucidation of Its Synergistic Mechanisms with Doxorubicin in the MCF7 Cells. Int J Mol Sci 2021; 22:ijms22157840. [PMID: 34360606 PMCID: PMC8346082 DOI: 10.3390/ijms22157840] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Revised: 07/18/2021] [Accepted: 07/19/2021] [Indexed: 12/11/2022] Open
Abstract
The combination of natural products with standard chemotherapeutic agents offers a promising strategy to enhance the efficacy or reduce the side effects of standard chemotherapy. Doxorubicin (DOX), a standard drug for breast cancer, has several disadvantages, including severe side effects and the development of drug resistance. Recently, we reported the potential bioactive markers of Australian propolis extract (AP-1) and their broad spectrum of pharmacological activities. In the present study, we explored the synergistic interactions between AP-1 and DOX in the MCF7 breast adenocarcinoma cells using different synergy quantitation models. Biochemometric and metabolomics-driven analysis was performed to identify the potential anticancer metabolites in AP-1. The molecular mechanisms of synergy were studied by analysing the apoptotic profile via flow cytometry, apoptotic proteome array and measuring the oxidative status of the MCF7 cells treated with the most synergistic combination. Furthermore, label-free quantification proteomics analysis was performed to decipher the underlying synergistic mechanisms. Five prenylated stilbenes were identified as the key metabolites in the most active AP-1 fraction. Strong synergy was observed when AP-1 was combined with DOX in the ratio of 100:0.29 (w/w) as validated by different synergy quantitation models implemented. AP-1 significantly enhanced the inhibitory effect of DOX against MCF7 cell proliferation in a dose-dependent manner with significant inhibition of the reactive oxygen species (p < 0.0001) compared to DOX alone. AP-1 enabled the reversal of DOX-mediated necrosis to programmed cell death, which may be advantageous to decline DOX-related side effects. AP-1 also significantly enhanced the apoptotic effect of DOX after 24 h of treatment with significant upregulation of catalase, HTRA2/Omi, FADD together with DR5 and DR4 TRAIL-mediated apoptosis (p < 0.05), contributing to the antiproliferative activity of AP-1. Significant upregulation of pro-apoptotic p27, PON2 and catalase with downregulated anti-apoptotic XIAP, HSP60 and HIF-1α, and increased antioxidant proteins (catalase and PON2) may be associated with the improved apoptosis and oxidative status of the synergistic combination-treated MCF7 cells compared to the mono treatments. Shotgun proteomics identified 21 significantly dysregulated proteins in the synergistic combination-treated cells versus the mono treatments. These proteins were involved in the TP53/ATM-regulated non-homologous end-joining pathway and double-strand breaks repairs, recruiting the overexpressed BRCA1 and suppressed RIF1 encoded proteins. The overexpression of UPF2 was noticed in the synergistic combination treatment, which could assist in overcoming doxorubicin resistance-associated long non-coding RNA and metastasis of the MCF7 cells. In conclusion, we identified the significant synergy and highlighted the key molecular pathways in the interaction between AP-1 and DOX in the MCF7 cells together with the AP-1 anticancer metabolites. Further in vivo and clinical studies are warranted on this synergistic combination.
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Affiliation(s)
- Muhammad A. Alsherbiny
- NICM Health Research Institute, Western Sydney University, Penrith, NSW 2751, Australia;
- Department of Pharmacognosy, Faculty of Pharmacy, Cairo University, Cairo 11562, Egypt
- Correspondence: (M.A.A.); (D.J.B.); (C.-G.L.)
| | - Deep J. Bhuyan
- NICM Health Research Institute, Western Sydney University, Penrith, NSW 2751, Australia;
- Correspondence: (M.A.A.); (D.J.B.); (C.-G.L.)
| | - Ibrahim Radwan
- Faculty of Science and Technology, University of Canberra, Canberra, ACT 2617, Australia;
| | - Dennis Chang
- NICM Health Research Institute, Western Sydney University, Penrith, NSW 2751, Australia;
| | - Chun-Guang Li
- NICM Health Research Institute, Western Sydney University, Penrith, NSW 2751, Australia;
- Correspondence: (M.A.A.); (D.J.B.); (C.-G.L.)
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8
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In Vitro Examinations of Cell Death Induction and the Immune Phenotype of Cancer Cells Following Radiative-Based Hyperthermia with 915 MHz in Combination with Radiotherapy. Cells 2021; 10:cells10061436. [PMID: 34201238 PMCID: PMC8230049 DOI: 10.3390/cells10061436] [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: 04/13/2021] [Revised: 05/28/2021] [Accepted: 05/30/2021] [Indexed: 11/17/2022] Open
Abstract
Multimodal tumor treatment settings consisting of radiotherapy and immunomodulating agents such as immune checkpoint inhibitors are more and more commonly applied in clinics. In this context, the immune phenotype of tumor cells has a major influence on the anti-tumor immune response as well as the composition of the tumor microenvironment. A promising approach to further boost anti-tumor immune responses is to add hyperthermia (HT), i.e., heating the tumor tissue between 39 °C to 45 °C for 60 min. One key technique is the use of radiative hyperthermia systems. However, knowledge is limited as to how the frequency of the used radiative systems affects the immune phenotype of the treated tumor cells. By using our self-designed in vitro hyperthermia system, we compared cell death induction and expression of immune checkpoint molecules (ICM) on the tumor cell surface of murine B16 melanoma and human MDA-MB-231 and MCF-7 breast cancer cells following HT treatment with clinically relevant microwaves at 915 MHz or 2.45 GHz alone, radiotherapy (RT; 2 × 5 Gy or 5 × 2 Gy) alone or in combination (RHT). At 44 °C, HT alone was the dominant cell death inductor with inactivation rates of around 70% for B16, 45% for MDA-MB-231 and 35% for MCF-7 at 915 MHz and 80%, 60% and 50% at 2.45 GHz, respectively. Additional RT resulted in 5–15% higher levels of dead cells. The expression of ICM on tumor cells showed time-, treatment-, cell line- and frequency-dependent effects and was highest for RHT. Computer simulations of an exemplary spherical cell revealed frequency-dependent local energy absorption. The frequency of hyperthermia systems is a newly identified parameter that could also affect the immune phenotype of tumor cells and consequently the immunogenicity of tumors.
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9
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Vostakolaei MA, Hatami-Baroogh L, Babaei G, Molavi O, Kordi S, Abdolalizadeh J. Hsp70 in cancer: A double agent in the battle between survival and death. J Cell Physiol 2020; 236:3420-3444. [PMID: 33169384 DOI: 10.1002/jcp.30132] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Revised: 09/23/2020] [Accepted: 10/16/2020] [Indexed: 12/11/2022]
Abstract
The heat shock protein (Hsps) superfamily, also known as molecular chaperones, are highly conserved and present in all living organisms and play vital roles in protein fate. The HspA1A (Hsp70-1), called Hsp70 in this review, is expressed at low or undetectable levels in most unstressed normal cells, but numerous studies have shown that diverse types of tumor cells express Hsp70 at the plasma membrane that leads to resistance to programmed cell death and tumor progression. Hsp70 is released into the extracellular milieu in three forms including free soluble, complexed with cancer antigenic peptides, and exosome forms. Therefore, it seems to be a promising therapeutic target in human malignancies. However, a great number of studies have indicated that both intracellular and extracellular Hsp70 have a dual function. A line of evidence presented that intracellular Hsp70 has a cytoprotective function via suppression of apoptosis and lysosomal cell death (LCD) as well as that extracellular Hsp70 can promote tumorigenesis and angiogenesis. Other evidence showed intracellular Hsp70 can promote apoptosis and membrane-associated/extracellular Hsp70 can elicit antitumor innate and adaptive immune responses. Given the contradictory functions, as a "double agent," could Hsp70 be a promising tool in the future of targeted cancer therapies? To answer this question, in this review, we will discuss the functions of Hsp70 in cancers besides inhibition and stimulation strategies for targeting Hsp70 along with their challenges.
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Affiliation(s)
- Mehdi A Vostakolaei
- Digestive Diseases Research Center, Ardabil University of Medical Sciences, Ardabil, Iran.,Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Leila Hatami-Baroogh
- Department of Reproduction and Development, Royan Institute for Animal Biotechnology, ACER, Isfahan, Iran
| | - Ghader Babaei
- Department of Biochemistry, Urmia University Medical Sciences, Urmia, Iran
| | - Ommoleila Molavi
- Biotechnology Research Center, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Shirafkan Kordi
- Antimicrobial Resistance Research Center, Faculty of Medicine, Mazandaran University of Medical Sciences, Sari, Iran.,Student Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Jalal Abdolalizadeh
- Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.,Paramedical Faculty, Tabriz University of Medical Sciences, Tabriz, Iran
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10
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Vostakolaei MA, Molavi O, Hejazi MS, Kordi S, Rahmati S, Barzegari A, Abdolalizadeh J. Isolation and characterization of a novel scFv antibody fragments specific for Hsp70 as a tumor biomarker. J Cell Biochem 2019; 120:14711-14724. [DOI: 10.1002/jcb.28732] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Revised: 03/12/2019] [Accepted: 03/22/2019] [Indexed: 12/15/2022]
Affiliation(s)
- Mehdi Asghari Vostakolaei
- Immunology Research Center Tabriz University of Medical Sciences Tabriz Iran
- Department of Pharmaceutical Biotechnology, Faculty of Pharmacy Tabriz University of Medical Sciences Tabriz Iran
| | - Ommoleila Molavi
- Department of Pharmaceutical Biotechnology, Faculty of Pharmacy Tabriz University of Medical Sciences Tabriz Iran
- Biotechnology Research Center Tabriz University of Medical Sciences Tabriz Iran
| | - Mohammad Saeid Hejazi
- Department of Pharmaceutical Biotechnology, Faculty of Pharmacy Tabriz University of Medical Sciences Tabriz Iran
| | - Shirafkan Kordi
- Department of Medical Biotechnology, Faculty of Advanced Medical Sciences Tabriz University of Medical Sciences Tabriz Iran
| | - Saman Rahmati
- Medical Biotechnology Department Biotechnology Research Center, Pasteur Institute of Iran Tehran Iran
| | - Abolfazl Barzegari
- Research Centre for Pharmaceutical Nanotechnology Tabriz University of Medical Sciences Tabriz Iran
| | - Jalal Abdolalizadeh
- Drug Applied Research Center Tabriz University of Medical Sciences Tabriz Iran
- Paramedical Faculty Tabriz University of Medical Sciences Tabriz Iran
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11
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Yoo E, Choi JH, Hoang NH, Lee JS, Vuong S, Hur B, Han P, Oh KT, Fahmy T, Kim D. Particle-in-Particle Platform for Nanoconfinement-Induced Oncothermia. ACS APPLIED BIO MATERIALS 2018; 1:1927-1941. [DOI: 10.1021/acsabm.8b00490] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Eunsoo Yoo
- Department of Pharmaceutical Sciences, Irma Lerma Rangel College of Pharmacy, Texas A&M University System Health Science Center, College Station, Texas 77843, United States
| | - Jong Hoon Choi
- Department of Pharmaceutical Sciences, Irma Lerma Rangel College of Pharmacy, Texas A&M University System Health Science Center, College Station, Texas 77843, United States
| | - Ngoc Ha Hoang
- Department of Pharmaceutical Sciences, Irma Lerma Rangel College of Pharmacy, Texas A&M University System Health Science Center, College Station, Texas 77843, United States
- College of Pharmacy, Chung-Ang University, Seoul, South Korea
| | | | - Steve Vuong
- Department of Pharmaceutical Sciences, Irma Lerma Rangel College of Pharmacy, Texas A&M University System Health Science Center, College Station, Texas 77843, United States
| | - Byul Hur
- Department of Engineering Technology and Industrial Distribution (ETID), Texas A&M University, College Station, Texas 77843, United States
| | | | - Kyung Taek Oh
- College of Pharmacy, Chung-Ang University, Seoul, South Korea
| | | | - Dongin Kim
- Department of Pharmaceutical Sciences, Irma Lerma Rangel College of Pharmacy, Texas A&M University System Health Science Center, College Station, Texas 77843, United States
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12
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Xu NW, Chen Y, Liu W, Chen YJ, Fan ZM, Liu M, Li LJ. Inhibition of JAK2/STAT3 Signaling Pathway Suppresses Proliferation of Burkitt's Lymphoma Raji Cells via Cell Cycle Progression, Apoptosis, and Oxidative Stress by Modulating HSP70. Med Sci Monit 2018; 24:6255-6263. [PMID: 30194286 PMCID: PMC6140376 DOI: 10.12659/msm.910170] [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] [Indexed: 02/06/2023] Open
Abstract
Background The aim of this study was to investigate the effect of the JAK2/STAT3 pathway on the proliferation, cell cycle distribution, apoptosis, and oxidative stress of Raji cells via regulating HSP70 expression. Material/Methods Raji cells were divided into Blank, HSP70 siRNA, NC siRNA, AG490 (a JAK2/STAT3 signaling pathway inhibitor), and HSP70 siRNA + rh JAK2 (recombinant human JAK2) groups. HSP70 expression was detected by quantitative real-time reverse transcription-PCR (qRT-PCR); the expression levels of HSP70 and JAK2/STAT3 pathway-related proteins were evaluated by Western blotting; cell proliferation was assessed by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assays; cell cycle distribution was observed by flow cytometry; cell apoptosis was tested by Annexin V-FITC/PI and Hoechst 33342/PI staining; reactive oxygen species (ROS) production was measured by dichloro-dihydro-fluorescein diacetate (DCFH-DA) assays; and MDA content and SOD and GSH-Px activities were determined using detection kits. Results AG490 obviously down-regulated HSP70 expression, inhibited proliferation, induced cell cycle arrest at the G0/G1 phase, and promoted apoptosis in Raji cells; these effects were similar to the effects of HSP70 siRNA. Furthermore, ROS production and MDA content were increased in Raji cells treated with HSP70 siRNA or AG490, while SOD and GSH-Px activities were reduced. Raji cells in the HSP70 siRNA + rh JAK2 group did not significantly differ from those in the Blank group in regards to proliferation, cell cycle, apoptosis, and oxidative stress. Conclusions Blocking the JAK2/STAT3 signaling pathway may inhibit proliferation, induce cell cycle arrest, and promote oxidative stress and apoptosis in Raji cells via the down-regulation of HSP70.
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Affiliation(s)
- Neng-Wen Xu
- Department of Hematology, Central Hospital of Lishui City, Lishui, Zhejiang, China (mainland)
| | - Yu Chen
- Department of Hematology, Central Hospital of Lishui City, Lishui, Zhejiang, China (mainland)
| | - Wei'e Liu
- Department of Hematology, Central Hospital of Lishui City, Lishui, Zhejiang, China (mainland)
| | - Yan-Jie Chen
- Department of Hematology, Central Hospital of Lishui City, Lishui, Zhejiang, China (mainland)
| | - Zhi-Min Fan
- Department of Hematology, Central Hospital of Lishui City, Lishui, Zhejiang, China (mainland)
| | - Min Liu
- Department of Hematology, Central Hospital of Lishui City, Lishui, Zhejiang, China (mainland)
| | - Lin-Jie Li
- Department of Hematology, Central Hospital of Lishui City, Lishui, Zhejiang, China (mainland)
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13
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Wang HX, Yang Y, Guo H, Hou DD, Zheng S, Hong YX, Cai YF, Huo W, Qi RQ, Zhang L, Chen HD, Gao XH. HSPB1 deficiency sensitizes melanoma cells to hyperthermia induced cell death. Oncotarget 2018; 7:67449-67462. [PMID: 27626679 PMCID: PMC5341888 DOI: 10.18632/oncotarget.11894] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2015] [Accepted: 08/22/2016] [Indexed: 12/04/2022] Open
Abstract
Hyperthermia has shown clinical potency as a single agent or as adjuvant to other therapies in cancer treatment. However, thermotolerance induced by thermosensitive genes such as the heat shock proteins can limit the efficacy of hyperthermic treatment. In the present study, we identified HSPB1 (HSP27) is hyperthermically inducible or endogenously highly expressed in both murine and human melanoma cell lines. We used a siRNA strategy to reduce HSPB1 levels and showed increased intolerance to hyperthermia via reduced cell viability and/or proliferation of cells. In the investigation of underlying mechanisms, we found knock down of HSPB1 further increased the proportion of apoptotic cells in hyperthermic treated melanoma cells when compared with either single agent alone, and both agents leaded to cell cycle arrest at G0/G1 or G2/M phases. We concluded that hyperthermia combined with silencing of HSPB1 enhanced cell death and resulted in failure to thrive in melanoma cell lines, implying the potential clinical utility of hyperthermia in combination with HSPB1 inhibition in cancer treatment.
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Affiliation(s)
- He-Xiao Wang
- Department of Dermatology, The First Hospital of China Medical University, Shenyang 110001, P.R. China
| | - Yang Yang
- Department of Dermatology, The First Hospital of China Medical University, Shenyang 110001, P.R. China
| | - Hao Guo
- Department of Dermatology, The First Hospital of China Medical University, Shenyang 110001, P.R. China
| | - Dian-Dong Hou
- Department of Dermatology, The First Hospital of China Medical University, Shenyang 110001, P.R. China
| | - Song Zheng
- Department of Dermatology, The First Hospital of China Medical University, Shenyang 110001, P.R. China
| | - Yu-Xiao Hong
- Department of Dermatology, The First Hospital of China Medical University, Shenyang 110001, P.R. China
| | - Yun-Fei Cai
- Department of Dermatology, The First Hospital of China Medical University, Shenyang 110001, P.R. China
| | - Wei Huo
- Department of Dermatology, The First Hospital of China Medical University, Shenyang 110001, P.R. China
| | - Rui-Qun Qi
- Department of Dermatology, The First Hospital of China Medical University, Shenyang 110001, P.R. China
| | - Li Zhang
- Department of Dermatology, The First Hospital of China Medical University, Shenyang 110001, P.R. China
| | - Hong-Duo Chen
- Department of Dermatology, The First Hospital of China Medical University, Shenyang 110001, P.R. China
| | - Xing-Hua Gao
- Department of Dermatology, The First Hospital of China Medical University, Shenyang 110001, P.R. China
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14
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Mahanty A, Mohanty S, Mohanty BP. Dietary supplementation of curcumin augments heat stress tolerance through upregulation of nrf-2-mediated antioxidative enzymes and hsps in Puntius sophore. FISH PHYSIOLOGY AND BIOCHEMISTRY 2017; 43:1131-1141. [PMID: 28315162 DOI: 10.1007/s10695-017-0358-z] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2016] [Accepted: 02/23/2017] [Indexed: 06/06/2023]
Abstract
Heat stress is one of the major environmental concerns in global warming regime and rising temperature has resulted in mass mortalities of animals including fishes. Therefore, strategies for high temperature stress tolerance and ameliorating the effects of heat stress are being looked for. In an earlier study, we reported that Nrf-2 (nuclear factor E2-related factor 2) mediated upregulation of antioxidative enzymes and heat shock proteins (Hsps) provide survivability to fish under heat stress. In this study, we have evaluated the ameliorative potential of dietary curcumin, a potential Nrf-2 inducer in heat stressed cyprinid Puntius sophore. Fishes were fed with diet supplemented with 0.5, 1.0, and 1.5% curcumin at the rate 2% of body weight daily in three separate groups (n = 40 in each group) for 60 days. Fishes fed with basal diet (without curcumin) served as the control (n = 40). Critical thermal maxima (CTmax) was determined for all the groups (n = 10, in duplicates) after the feeding trial. Significant increase in the CTmax was observed in the group fed with 1.5% curcumin- supplemented fishes whereas it remained similar in groups fed with 0.5%, and 1% curcumin-supplemented diet, as compared to control. To understand the molecular mechanism of elevated thermotolerance in the 1.5% curcumin supplemented group, fishes were given a sub-lethal heat shock treatment (36 °C) for 6 h and expression analysis of nrf-2, keap-1, sod, catalase, gpx, and hsp27, hsp60, hsp70, hsp90, and hsp110 was carried out using RT-PCR. In the gill, expression of nrf-2, sod, catalase, gpx, and hsp60, hsp70, hsp90, and hsp110 was found to be elevated in the 1.5% curcumin-fed heat-shocked group compared to control and the basal diet-fed, heat-shocked fishes. Similarly, in the liver, upregulation in expression of nrf-2, sod, catalase, and hsp70 and hsp110 was observed in 1.5% curcumin supplemented and heat shocked group. Thus, this study showed that supplementation of curcumin augments tolerance to high temperature stress in P. sophore that could be attributed to nrf-2-induced upregulation of antioxidative enzymes sod, catalase, gpx, and the hsps.
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Affiliation(s)
- Arabinda Mahanty
- Fishery Resource and Environmental Management Division, Biochemistry Laboratory, ICAR - Central Inland Fisheries Research Institute, Barrackpore, Kolkata, 700120, India
- School of Biotechnology, KIIT University, Bhubaneswar, 751024, India
| | - Sasmita Mohanty
- School of Biotechnology, KIIT University, Bhubaneswar, 751024, India
| | - Bimal P Mohanty
- Fishery Resource and Environmental Management Division, Biochemistry Laboratory, ICAR - Central Inland Fisheries Research Institute, Barrackpore, Kolkata, 700120, India.
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15
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Mahanty A, Purohit GK, Yadav RP, Mohanty S, Mohanty BP. hsp90 and hsp47 appear to play an important role in minnow Puntius sophore for surviving in the hot spring run-off aquatic ecosystem. FISH PHYSIOLOGY AND BIOCHEMISTRY 2017; 43:89-102. [PMID: 27522494 DOI: 10.1007/s10695-016-0270-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2016] [Accepted: 08/01/2016] [Indexed: 06/06/2023]
Abstract
Changes in the expression of a number of hsp genes in minnow Puntius sophore collected from a hot spring run-off (Atri hot spring in Odisha, India; 20o09'N 85°18'E, 36-38 °C) were investigated to study the upper thermal acclimation response under heat stress, using same species from aquaculture ponds (water temperature 27 °C) as control. Expression of hsp genes was analyzed in both groups using RT-qPCR, which showed up-regulation of hsp90 (2.1-fold) and hsp47 (2.5-fold) in hot spring run-off fishes, whereas there was no alteration in expression of other hsps. As the fish inhabit the hot spring run-off area for very long duration, they could have adapted to the environment. To test this hypothesis, fishes collected from hot spring run-off were divided into two groups; one was heat-shocked at 41 °C/24 h, and the other was acclimatized at 27 °C/24 h. Up-regulation of all the hsps (except hsp78) was observed in the heat-shocked fishes, whereas expression of all hsps was found to be down-regulated to the basal level in fishes maintained at 27 °C/24 h. Pathway analysis showed that the expressions of all the hsps except hsp90 are regulated by the transcription factor heat shock factor 1 (Hsf1). This study showed that hsp90 and hsp47 play an important role in Puntius sophore for surviving in the high-temperature environment of the hot spring run-off. Additionally, we show that plasticity in hsp gene expression is not lost in the hot spring run-off population.
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Affiliation(s)
- Arabinda Mahanty
- Biochemistry Laboratory, Proteomics Unit, Fishery Resource and Environmental Management Division, ICAR- Central Inland Fisheries Research Institute, Barrackpore, Kolkata, 700120, India
- KIIT School of Biotechnology, KIIT University, Bhubaneswar, Odisha, 751024, India
| | | | - Ravi Prakash Yadav
- KIIT School of Biotechnology, KIIT University, Bhubaneswar, Odisha, 751024, India
| | - Sasmita Mohanty
- KIIT School of Biotechnology, KIIT University, Bhubaneswar, Odisha, 751024, India
| | - Bimal Prasanna Mohanty
- Biochemistry Laboratory, Proteomics Unit, Fishery Resource and Environmental Management Division, ICAR- Central Inland Fisheries Research Institute, Barrackpore, Kolkata, 700120, India.
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16
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Zhou L, Zhang M, Fu Q, Li J, Sun H. Targeted near infrared hyperthermia combined with immune stimulation for optimized therapeutic efficacy in thyroid cancer treatment. Oncotarget 2017; 7:6878-90. [PMID: 26769848 PMCID: PMC4872755 DOI: 10.18632/oncotarget.6901] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2015] [Accepted: 12/29/2015] [Indexed: 01/08/2023] Open
Abstract
Treatment of thyroid cancer has incurred much focus because of its high prevalency. As a new strategy treating thyroid cancer, hyperthermia takes several advantages compared with surgery or chemotherapy, including minimal invasion, low systematic toxicity and the ability to enhance the immunogenicity of cancer cells with the expression Hsp70 which serves as Toll-like receptors-4 (TLR-4 agonist). However, Hsp70 as a molecular chaperone can protect cells from heat induced apoptosis and therefore compromise the tumor killing effect of hyperthermia. In this study, to solve this problem, a combined hyperthermia therapy was employed to treat thyroid cancer. We prepared a probe with the tumor targeting agent AG to monitor thyroid tumor issue and generate heat to kill tumor cells in vivo. At the same time Quercetin (inhibitor of HSP70) and lipopolysaccharide (LPS) (agonist of TLR-4) were used for the combined hyperthermia therapy. The results showed that compared with free IR820, AG modification facilitated much enhanced cellular uptake and greatly pronounced tumor targeting ability. The combined therapy exhibited the most remarkable tumor inhibition compared with the single treatments both in vitro and in vivo. These findings verified that the new therapeutic combination could significantly improve the effect of hyperthermia and shed light on a novel clinical strategy in thyroid cancer treatment.
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Affiliation(s)
- Le Zhou
- Department of Thyroid Surgery, China-Japan Union Hospital, Jilin University, Jilin Provincial Key Laboratory of Surgical Translational Medicine, Changchun 130033, China
| | - Mengchao Zhang
- Radiology Department, China-Japan Union Hospital, Jilin University, Changchun 130033, China
| | - Qingfeng Fu
- Department of Thyroid Surgery, China-Japan Union Hospital, Jilin University, Jilin Provincial Key Laboratory of Surgical Translational Medicine, Changchun 130033, China
| | - Jingting Li
- Department of Thyroid Surgery, China-Japan Union Hospital, Jilin University, Jilin Provincial Key Laboratory of Surgical Translational Medicine, Changchun 130033, China
| | - Hui Sun
- Department of Thyroid Surgery, China-Japan Union Hospital, Jilin University, Jilin Provincial Key Laboratory of Surgical Translational Medicine, Changchun 130033, China
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17
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Oskay Halacli S. FOXP1 enhances tumor cell migration by repression of NFAT1 transcriptional activity in MDA-MB-231 cells. Cell Biol Int 2016; 41:102-110. [PMID: 27859969 DOI: 10.1002/cbin.10702] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2016] [Accepted: 11/06/2016] [Indexed: 01/01/2023]
Abstract
Until now, forkhead box P1 (FOXP1) has been identified as a tumor suppressor in several correlation studies in breast cancer. Although FOXP1 is defined as a transcriptional repressor that interacts with other transcription factors in various mechanistic studies, there is no study that explains its repressor functions in breast cancer biology. This study demonstrated the repressor function of FOXP1 on nuclear factor of activated T cells (NFAT1) and the migratory effect of this repression in MDA-MB-231 breast cancer cells. Co-immunoprecipitation experiments were performed for the investigation of protein-protein interaction between two transcription factors. Protein-protein interaction on DNA was investigated with EMSA and transcriptional effects of FOXP1 on NFAT1, luciferase reporter assay was performed. Wound healing assay was used to analyze the effects of overexpression of FOXP1 on tumor cell migration. This study showed that FOXP1 has protein-protein interaction with NFAT1 on DNA and enhances breast cancer cell migration by repressing NFAT1 transcriptional activity and FOXP1 shows oncogenic function by regulating breast cancer cell motility.
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Affiliation(s)
- Sevil Oskay Halacli
- Department of Pediatric Immunology, Institute of Child Health, Hacettepe University, Sihhiye, 06100, Ankara, Turkey
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18
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Codonho BS, Costa SDS, Peloso EDF, Joazeiro PP, Gadelha FR, Giorgio S. HSP70 of Leishmania amazonensis alters resistance to different stresses and mitochondrial bioenergetics. Mem Inst Oswaldo Cruz 2016; 0:0. [PMID: 27304024 PMCID: PMC4957499 DOI: 10.1590/0074-02760160087] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2016] [Accepted: 04/28/2016] [Indexed: 01/09/2023] Open
Abstract
The 70 kDa heat shock protein (HSP70) is a molecular chaperone that assists the parasite Leishmania in returning to homeostasis after being subjected to different types of stress during its life cycle. In the present study, we evaluated the effects of HSP70 transfection of L. amazonensis promastigotes (pTEX-HSP70) in terms of morphology, resistance, infectivity and mitochondrial bioenergetics. The pTEX-HSP70 promastigotes showed no ultrastructural morphological changes compared to control parasites. Interestingly, the pTEX-HSP70 promastigotes are resistant to heat shock, H2O2-induced oxidative stress and hyperbaric environments. Regarding the bioenergetics parameters, the pTEX-HSP70 parasites had higher respiratory rates and released less H2O2 than the control parasites. Nevertheless, the infectivity capacity of the parasites did not change, as verified by the infection of murine peritoneal macrophages and human macrophages, as well as the infection of BALB/c mice. Together, these results indicate that the overexpression of HSP70 protects L. amazonensis from stress, but does not interfere with its infective capacity.
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Affiliation(s)
- Bárbara Santoni Codonho
- Universidade Estadual de Campinas, Instituto de Biologia, Departamento de Biologia Animal, Campinas, SP, Brasil
| | - Solange dos Santos Costa
- Universidade Estadual de Campinas, Instituto de Biologia, Departamento de Biologia Animal, Campinas, SP, Brasil
| | - Eduardo de Figueiredo Peloso
- Universidade Estadual de Campinas, Instituto de Biologia, Departamento de Bioquímica e Biologia Tecidual, Campinas, SP, Brasil
| | - Paulo Pinto Joazeiro
- Universidade Estadual de Campinas, Instituto de Biologia, Departamento de Bioquímica e Biologia Tecidual, Campinas, SP, Brasil
| | - Fernanda Ramos Gadelha
- Universidade Estadual de Campinas, Instituto de Biologia, Departamento de Bioquímica e Biologia Tecidual, Campinas, SP, Brasil
| | - Selma Giorgio
- Universidade Estadual de Campinas, Instituto de Biologia, Departamento de Biologia Animal, Campinas, SP, Brasil
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19
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Kumar S, Stokes J, Singh UP, Scissum Gunn K, Acharya A, Manne U, Mishra M. Targeting Hsp70: A possible therapy for cancer. Cancer Lett 2016; 374:156-166. [PMID: 26898980 PMCID: PMC5553548 DOI: 10.1016/j.canlet.2016.01.056] [Citation(s) in RCA: 154] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2015] [Revised: 01/28/2016] [Accepted: 01/31/2016] [Indexed: 01/13/2023]
Abstract
In all organisms, heat-shock proteins (HSPs) provide an ancient defense system. These proteins act as molecular chaperones by assisting proper folding and refolding of misfolded proteins and aid in the elimination of old and damaged cells. HSPs include Hsp100, Hsp90, Hsp70, Hsp40, and small HSPs. Through its substrate-binding domains, Hsp70 interacts with wide spectrum of molecules, ranging from unfolded to natively folded and aggregated proteins, and provides cytoprotective role against various cellular stresses. Under pathophysiological conditions, the high expression of Hsp70 allows cells to survive with lethal injuries. Increased Hsp70, by interacting at several points on apoptotic signaling pathways, leads to inhibition of apoptosis. Elevated expression of Hsp70 in cancer cells may be responsible for tumorigenesis and for tumor progression by providing resistance to chemotherapy. In contrast, inhibition or knockdown of Hsp70 reduces the size of tumors and can cause their complete regression. Moreover, extracellular Hsp70 acts as an immunogen that participates in cross presentation of MHC-I molecules. The goals of this review are to examine the roles of Hsp70 in cancer and to present strategies targeting Hsp70 in the development of cancer therapeutics.
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Affiliation(s)
- Sanjay Kumar
- Cancer Biology Research and Training Program, Department of Biological Sciences, Alabama State University, AL 36101, USA
| | - James Stokes
- Cancer Biology Research and Training Program, Department of Biological Sciences, Alabama State University, AL 36101, USA
| | - Udai P Singh
- Department of Pathology, Microbiology and Immunology, University of South Carolina School of Medicine, Columbia, SC 29208, USA
| | - Karyn Scissum Gunn
- Cancer Biology Research and Training Program, Department of Biological Sciences, Alabama State University, AL 36101, USA
| | - Arbind Acharya
- Centre of Advance Study in Zoology, Faculty of Science, Banaras Hindu University, Varanasi 221 005, India
| | - Upender Manne
- Department of Pathology, University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Manoj Mishra
- Cancer Biology Research and Training Program, Department of Biological Sciences, Alabama State University, AL 36101, USA.
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20
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Ozaydin T, Sur E, Oznurlu Y, Celik I, Uluisik D. Immunohistochemical distribution of heat shock protein 70 and proliferating cell nuclear antigen in mouse placenta at different gestational stages. Microsc Res Tech 2016; 79:251-7. [DOI: 10.1002/jemt.22624] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2015] [Revised: 12/08/2015] [Accepted: 12/25/2015] [Indexed: 11/09/2022]
Affiliation(s)
- Tugba Ozaydin
- Department of Histology and Embryology; Faculty of Veterinary Medicine, University of Selcuk, TR-42075; Campus Konya Turkey
| | - Emrah Sur
- Department of Histology and Embryology; Faculty of Veterinary Medicine, University of Selcuk, TR-42075; Campus Konya Turkey
| | - Yasemin Oznurlu
- Department of Histology and Embryology; Faculty of Veterinary Medicine, University of Selcuk, TR-42075; Campus Konya Turkey
| | - Ilhami Celik
- Department of Histology and Embryology; Faculty of Veterinary Medicine, University of Selcuk, TR-42075; Campus Konya Turkey
| | - Deniz Uluisik
- Department of Physiology; Faculty of Veterinary Medicine, University of Selcuk, TR-42075; Campus Konya Turkey
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21
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Kulminski AM, Arbeev KG, Culminskaya I, Ukraintseva SV, Stallard E, Province MA, Yashin AI. Trade-offs in the effects of the apolipoprotein E polymorphism on risks of diseases of the heart, cancer, and neurodegenerative disorders: insights on mechanisms from the Long Life Family Study. Rejuvenation Res 2016; 18:128-35. [PMID: 25482294 DOI: 10.1089/rej.2014.1616] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The lack of evolutionary established mechanisms linking genes to age-related traits makes the problem of genetic susceptibility to health span inherently complex. One complicating factor is genetic trade-off. Here we focused on long-living participants of the Long Life Family Study (LLFS), their offspring, and spouses to: (1) Elucidate whether trade-offs in the effect of the apolipoprotein E e4 allele documented in the Framingham Heart Study (FHS) are a more general phenomenon, and (2) explore potential mechanisms generating age- and gender-specific trade-offs in the effect of the e4 allele on cancer, diseases of the heart, and neurodegenerative disorders assessed retrospectively in the LLFS populations. The e4 allele can diminish risks of cancer and diseases of the heart and confer risks of diseases of the heart in a sex-, age-, and LLFS-population-specific manner. A protective effect against cancer is seen in older long-living men and, potentially, their sons (>75 years, relative risk [RR]>75=0.48, p=0.086), which resembles our findings in the FHS. The protective effect against diseases of the heart is limited to long-living older men (RR>76=0.50, p=0.016), as well. A detrimental effect against diseases of the heart is characteristic for a normal LLFS population of male spouses and is specific for myocardial infarction (RR=3.07, p=2.1×10(-3)). These trade-offs are likely associated with two inherently different mechanisms, including disease-specific (detrimental; characteristic for a normal male population) and systemic, aging-related (protective; characteristic for older long-living men) mechanisms. The e4 allele confers risks of neurological disorders in men and women (RR=1.98, p=0.046). The results highlight the complex role of the e4 allele in genetic susceptibility to health span.
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Targeting the heat shock response in combination with radiotherapy: Sensitizing cancer cells to irradiation-induced cell death and heating up their immunogenicity. Cancer Lett 2015; 368:209-29. [DOI: 10.1016/j.canlet.2015.02.047] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2014] [Revised: 02/22/2015] [Accepted: 02/26/2015] [Indexed: 12/16/2022]
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Alphandéry E. Perspectives of breast cancer thermotherapies. J Cancer 2014; 5:472-9. [PMID: 24959300 PMCID: PMC4066359 DOI: 10.7150/jca.8693] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2014] [Accepted: 05/08/2014] [Indexed: 01/08/2023] Open
Abstract
In this article, the use of different types of thermotherapies to treat breast cancer is reviewed. While hyperthermia is most commonly used as an adjuvant in combination with radiotherapy, chemotherapy, targeted therapy or cryotherapy to enhance the therapeutic effect of these therapies, thermoablation is usually carried out alone to eradicate small breast tumors. A recently developed thermotherapy, called magnetic hyperthermia, which involves localized heating of nanoparticles under the application of an alternating magnetic field, is also presented. The advantages and drawbacks of these different thermotherapies are highlighted.
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Affiliation(s)
- Edouard Alphandéry
- 1. Nanobacterie SARL, 36 boulevard Flandrin, 75116, Paris, France. ; 2. Institut de Minéralogie et de Physique des Milieux Condensés, Université Pierre et Marie Curie, 4 Place Jussieu, 75005, Paris, France
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Kulminski AM. Unraveling genetic origin of aging-related traits: evolving concepts. Rejuvenation Res 2014; 16:304-12. [PMID: 23768105 DOI: 10.1089/rej.2013.1441] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Discovering the genetic origin of aging-related traits could greatly advance strategies aiming to extend health span. The results of genome-wide association studies (GWAS) addressing this problem are controversial, and new genetic concepts have been fostered to advance the progress in the field. A limitation of GWAS and new genetic concepts is that they do not thoroughly address specifics of aging-related traits. Integration of theoretical concepts in genetics and aging research with empirical evidence from different disciplines highlights the conceptual problems in studies of genetic origin of aging-related traits. To address these problems, novel approaches of systemic nature are required. These approaches should adopt the non-deterministic nature of linkage of genes with aging-related traits and, consequently, reinforce research strategies for improving our understanding of mechanisms shaping genetic effects on these traits. Investigation of mechanisms will help determine conditions that activate specific genetic variants or profiles and explore to what extent these conditions that shape genetic effects are conserved across human lives and generations.
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Affiliation(s)
- Alexander M Kulminski
- Center for Population Health and Aging, Duke University, Durham, North Carolina 27708, USA.
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Rybinski M, Szymanska Z, Lasota S, Gambin A. Modelling the efficacy of hyperthermia treatment. J R Soc Interface 2013; 10:20130527. [PMID: 23985732 PMCID: PMC3785818 DOI: 10.1098/rsif.2013.0527] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022] Open
Abstract
Multimodal oncological strategies which combine chemotherapy or radiotherapy with hyperthermia, have a potential of improving the efficacy of the non-surgical methods of cancer treatment. Hyperthermia engages the heat-shock response (HSR) mechanism, the main component of which are heat-shock proteins. Cancer cells have already partially activated HSR, thereby hyperthermia may be more toxic to them relative to normal cells. On the other hand, HSR triggers thermotolerance, i.e. hyperthermia-treated cells show an impairment in their susceptibility to a subsequent heat-induced stress. This poses questions about efficacy and optimal strategy for anti-cancer therapy combined with hyperthermia treatment. To address these questions, we adapt our previous HSR model and propose its stochastic extension. We formalize the notion of a HSP-induced thermotolerance. Next, we estimate the intensity and the duration of the thermotolerance. Finally, we quantify the effect of a multimodal therapy based on hyperthermia and a cytotoxic effect of bortezomib, a clinically approved proteasome inhibitor. Consequently, we propose an optimal strategy for combining hyperthermia and proteasome inhibition modalities. In summary, by a mathematical analysis of HSR, we are able to support the common belief that the combination of cancer treatment strategies increases therapy efficacy.
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Kulminski AM, Culminskaya I, Arbeev KG, Ukraintseva SV, Arbeeva L, Yashin AI. Trade-off in the effect of the APOE gene on the ages at onset of cardiocascular disease and cancer across ages, gender, and human generations. Rejuvenation Res 2013; 16:28-34. [PMID: 23094790 DOI: 10.1089/rej.2012.1362] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
Decades of studies of candidate genes show their complex role in aging-related traits. We focus on apolipoprotein E e2/3/4 polymorphism and ages at onset of cardiovascular diseases (CVD) and cancer in the parental and offspring generations of the Framingham Heart Study participants to gain insights on the role of age and gender across generations in genetic trade-offs. The analyses show that the apolipoprotein E e4 allele carriers live longer lives without cancer than the non-e4 allele carriers in each generation. The role of the e4 allele in onset of CVD is age- and generation-specific, constituting two modes of sexually dimorphic genetic trade-offs. In offspring, the e4 allele confers risk of CVD primarily in women and can protect against cancer primarily in men of the same age. In the parental generation, genetic trade-off is seen in different age groups, with a protective role of the e4 allele against cancer in older men and its detrimental role in CVD in younger women. The puzzling complexity of genetic mechanisms working in different genders, ages, and environments calls for more detail and systemic analyses beyond those adapted in current large-scale genetic association studies.
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Affiliation(s)
- Alexander M Kulminski
- Center for Population Health and Aging, Duke University, Durham, North Carolina 27708, USA.
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Oskay Halacli S, Halacli B, Altundag K. The significance of heat shock proteins in breast cancer therapy. Med Oncol 2013; 30:575. [PMID: 23606238 DOI: 10.1007/s12032-013-0575-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2013] [Accepted: 04/04/2013] [Indexed: 12/16/2022]
Abstract
The evalutionary conserved heat shock proteins are involved basically life protecting mechanisms against harmful extracellular effects such as primarily heat shock response. Normally, the expression of these proteins is increased for cellular adaptation to high temperature. This increase is also important in the etiology of breast cancer. Overexpression of heat shock proteins is associated with reduced disease-free survival in breast cancer. However, increased expression of these proteins is related to acquired resistance of traditional chemotherapeutic drugs in use in breast cancer treatment. In this review, we discuss the multiple roles of heatshock proteins in resistance and where we are to overcome this in clinical practice.
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Affiliation(s)
- Sevil Oskay Halacli
- Department of Medical Oncology, Hacettepe University Cancer Institute, Sihhiye, Ankara 06100, Turkey
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Yamamoto D, Inui T, Tsubota Y, Sueoka N, Yamamoto C, Kuwana K, Yamamoto M. The utility of hyperthermia for local recurrence of breast cancer. World J Surg Oncol 2012; 10:201. [PMID: 23017037 PMCID: PMC3500728 DOI: 10.1186/1477-7819-10-201] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2012] [Accepted: 09/21/2012] [Indexed: 11/15/2022] Open
Abstract
Background Hyperthermia has long been used in combination with chemotherapy or radiation therapy for the treatment of superficial malignancies, in part due to its sensitizing capabilities. Patients who suffer from superficial recurrences of breast cancer have poor clinical outcomes. Skin metastases may particularly impair the quality of life due to the physical appearance, odor and bleeding. Case presentation A 66-year-old woman underwent mastectomy and axillary lymph node dissection for breast cancer. Nine years post-operatively, local metastases developed in the left axillary area (measuring 5 cm in diameter). Initially the tumor did not respond to radiation therapy and chemotherapy. Therefore, we added hyperthermia combined with them. Eight weeks later, the tumor became nearly flat and the patient noted improved activity in her daily life. Conclusion Hyperthermia may accelerate the antitumor effects of radiation therapy and chemotherapy. This treatment provides an alternative for unresectable breast cancer skin metastases.
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Affiliation(s)
- Daigo Yamamoto
- Department of Surgery, Kansai Medical University, Hirakata, Japan.
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Mathematical determination of cell population doubling times for multiple cell lines. Bull Math Biol 2012; 74:2510-34. [PMID: 22914970 DOI: 10.1007/s11538-012-9764-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2011] [Accepted: 07/30/2012] [Indexed: 10/28/2022]
Abstract
Cell cycle times are vital parameters in cancer research, and short cell cycle times are often related to poor survival of cancer patients. A method for experimental estimation of cell cycle times, or doubling times of cultured cancer cell populations, based on addition of paclitaxel (an inhibitor of cell division) has been proposed in literature. We use a mathematical model to investigate relationships between essential parameters of the cell division cycle following inhibition of cell division. The reduction in the number of cells engaged in DNA replication reaches a plateau as the concentration of paclitaxel is increased; this can be determined experimentally. From our model we have derived a plateau log reduction formula for proliferating cells and established that there are linear relationships between the plateau log reduction values and the reciprocal of doubling times (i.e. growth rates of the populations). We have therefore provided theoretical justification of an important experimental technique to determine cell doubling times. Furthermore, we have applied Monte Carlo experiments to justify the suggested linear relationships used to estimate doubling time from 5-day cell culture assays. We show that our results are applicable to cancer cell populations with cell loss present.
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Lee HH, Lim CA, Cheong YT, Singh M, Gam LH. Comparison of protein expression profiles of different stages of lymph nodes metastasis in breast cancer. Int J Biol Sci 2012; 8:353-62. [PMID: 22393307 PMCID: PMC3291852 DOI: 10.7150/ijbs.3157] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2011] [Accepted: 01/04/2012] [Indexed: 11/30/2022] Open
Abstract
Breast cancer is the most common cancer among women worldwide. Breast cancer metastasis primarily happens through lymphatic system, where the extent of lymph node metastasis is the major factor influencing staging, prognosis and therapeutic decision of the disease. We aimed to study the protein expression changes in different N (regional lymph nodes) stages of breast cancer. Protein expression profiles of breast cancerous and adjacent normal tissues were mapped by proteomics approach that comprises of two-dimensional polyacrylamide gel electrophoresis (2D-PAGE) and tandem mass spectrometry (LC-MS/MS) analysis. Calreticulin and tropomyosin alpha 3 chains were the common up-regulated proteins in N0, N1 and N2 stages of breast cancer. Potential biomarker for each N stage was HSP 70 for N0, 80 k protein H precursor and PDI for N1 stage while 78 kDa glucose-regulated protein was found useful for N2 stage. In addition, significant up-regulation of PDI A3 was detected only in the metastasized breast cancer. The up-regulation expression of these proteins in cancerous tissues can potentially use as indicators for diagnosis, treatment and prognosis of different N stages of breast cancer.
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Affiliation(s)
- Hui-Hua Lee
- School of Pharmaceutical Sciences, Universiti Sains Malaysia, USM, Penang, Malaysia
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Rempp H, Hoffmann R, Roland J, Buck A, Kickhefel A, Claussen CD, Pereira PL, Schick F, Clasen S. Threshold-based prediction of the coagulation zone in sequential temperature mapping in MR-guided radiofrequency ablation of liver tumours. Eur Radiol 2011; 22:1091-100. [PMID: 22105843 DOI: 10.1007/s00330-011-2335-8] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2011] [Revised: 09/15/2011] [Accepted: 09/27/2011] [Indexed: 12/16/2022]
Abstract
OBJECTIVE To evaluate different cut-off temperature levels for a threshold-based prediction of the coagulation zone in magnetic resonance (MR)-guided radiofrequency (RF) ablation of liver tumours. METHODS Temperature-sensitive measurements were acquired during RF ablation of 24 patients with primary (6) and secondary liver lesions (18) using a wide-bore 1.5 T MR sytem and compared with the post-interventional coagulation zone. Temperature measurements using the proton resonance frequency shift method were performed directly subsequent to energy application. The temperature maps were registered on the contrast-enhanced follow-up MR images acquired 4 weeks after treatment. Areas with temperatures above 50°, 55° and 60°C were segmented and compared with the coagulation zones. Sensitivity and positive predictive value were calculated. RESULTS No major complications occurred and all tumours were completely treated. No tumour recurrence was observed at the follow-up examination after 4 weeks. Two patients with secondary liver lesions showed local tumour recurrence after 4 and 7 months. The 60°C threshold level achieved the highest positive predictive value (87.7 ± 9.9) and the best prediction of the coagulation zone. CONCLUSIONS For a threshold-based prediction of the coagulation zone, the 60°C cut-off level achieved the best prediction of the coagulation zone among the tested levels. KEY POINTS • Temperature monitoring can be used to survey MR-guided radiofrequency ablation • The developing ablation zone can be estimated based on post-interventional temperature measurements • A 60°C threshold level can be used to predict the ablation zone • The 50°C and 55°C temperature zones tend to overestimate the ablation zone.
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Affiliation(s)
- Hansjörg Rempp
- Department on Diagnostic and Interventional Radiology, Eberhard Karls University of Tübingen, Hoppe-Seyler-Straße 3, 72076 Tübingen, Germany.
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Rylander MN, Stafford RJ, Hazle J, Whitney J, Diller KR. Heat shock protein expression and temperature distribution in prostate tumours treated with laser irradiation and nanoshells. Int J Hyperthermia 2011; 27:791-801. [DOI: 10.3109/02656736.2011.607485] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
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A mathematical model of cell cycle progression applied to the MCF-7 breast cancer cell line. Bull Math Biol 2011; 74:736-67. [PMID: 22083513 DOI: 10.1007/s11538-011-9700-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2010] [Accepted: 10/11/2011] [Indexed: 10/15/2022]
Abstract
In this paper, we present a model of cell cycle progression and apply it to cells of the MCF-7 breast cancer cell line. We consider cells existing in the three typical cell cycle phases determined using flow cytometry: the G1, S, and G2/M phases. We further break each phase up into model phases in order to capture certain features such as cells remaining in phases for a minimum amount of time. The model is also able to capture the environmentally responsive part of the G1 phase, allowing for quantification of the number of environmentally responsive cells at each point in time. The model parameters are carefully chosen using data from various sources in the biological literature. The model is then validated against a variety of experiments, and the excellent fit with experimental results allows for insight into the mechanisms that influence observed biological phenomena. In particular, the model is used to question the common assumption that a 'slow cycling population' is necessary to explain some results. Finally, an extension is proposed, where cell death is included in order to accurately model the effects of tamoxifen, a common first line anticancer drug in breast cancer patients. We conclude that the model has strong potential to be used as an aid in future experiments to gain further insight into cell cycle progression and cell death.
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34
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Studying the growth kinetics of untreated clinical tumors by using an advanced discrete simulation model. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/j.mcm.2011.05.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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Kim H, Heo K, Choi J, Kim K, An W. Histone variant H3.3 stimulates HSP70 transcription through cooperation with HP1γ. Nucleic Acids Res 2011; 39:8329-41. [PMID: 21742762 PMCID: PMC3201866 DOI: 10.1093/nar/gkr529] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
Histone variant H3.3 and heterochromatin protein 1γ (HP1γ) are two functional components of chromatin with role in gene transcription. However, the regulations of their dynamics during transcriptional activation and the molecular mechanisms underlying their actions remain poorly understood. Here, we provide evidence that heat shock-induced transcription of the human HSP70 gene is regulated via the coordinated and interdependent action of H3.3 and HP1γ. H3.3 and HP1γ are rapidly co-enriched at the human HSP70 promoters upon heat shock in a manner that closely parallels the initiation of transcription. Knockdown of H3.3 prevents the stable recruitment of HP1γ, inhibits active histone modifications, and attenuates HSP70 promoter activity. Likewise, knockdown of HP1γ leads to the decreased levels of H3.3 in the promoter regions and the repression of HSP70 genes. HP1γ selectively recognizes particular modification states of H3.3 in the nucleosome for its action. Moreover, HP1γ is overexpressed in three representative cancer cell lines, and its knockdown leads to reduction in HSP70 gene transcription and inhibition of cancer cell proliferation. We conclude that the physical and functional interactions between H3.3 and HP1γ make a unique contribution to acute HSP70 transcription and cancer development related to the misregulation of this transcription event.
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Affiliation(s)
- Hyunjung Kim
- Department of Biochemistry and Molecular Biology, University of Southern California, Norris Comprehensive Cancer Center, Los Angeles, CA 90033, USA
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Belton M, Prato FS, Carson JJ. Effect of glutathione depletion, hyperthermia, and a 100-mT static magnetic field on an hsp70/luc reporter system. Bioelectromagnetics 2011; 32:453-62. [DOI: 10.1002/bem.20659] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2010] [Accepted: 01/20/2011] [Indexed: 11/06/2022]
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The clinicopathological significance of heat shock protein 70 and glutamine synthetase expression in hepatocellular carcinoma. JOURNAL OF HEPATO-BILIARY-PANCREATIC SCIENCES 2011; 18:544-50. [DOI: 10.1007/s00534-010-0367-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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38
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Zagar TM, Oleson JR, Vujaskovic Z, Dewhirst MW, Craciunescu OI, Blackwell KL, Prosnitz LR, Jones EL. Hyperthermia combined with radiation therapy for superficial breast cancer and chest wall recurrence: a review of the randomised data. Int J Hyperthermia 2010; 26:612-7. [PMID: 20849256 DOI: 10.3109/02656736.2010.487194] [Citation(s) in RCA: 73] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
Hyperthermia has long been used in combination with radiation for the treatment of superficial malignancies, in part due to its radiosensitising capabilities. Patients who suffer superficial recurrences of breast cancer, be it in their chest wall following mastectomy, or in their breast after breast conservation, typically have poor clinical outcomes. They often develop distant metastatic disease, but one must not overlook the problems associated with an uncontrolled local failure. Morbidity is enormous, and can significantly impair quality of life. There is no accepted standard of care in treating superficial recurrences of breast cancer, particularly in patients that have previously been irradiated. There is a substantial literature regarding the combined use of hyperthermia and radiotherapy for these superficial recurrences. Most of it is retrospective in nature, but there are several larger phase III randomised trials that show an improved rate of clinical complete response in patients treated with both modalities. In this review article, we will highlight the important prospective data that has been published regarding the combined use of hyperthermia and radiation.
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Affiliation(s)
- Timothy M Zagar
- Department of Radiation Oncology, Duke University Medical Center, Durham, North Carolina 27710, USA
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Rylander MN, Feng Y, Zimmermann K, Diller KR. Measurement and mathematical modeling of thermally induced injury and heat shock protein expression kinetics in normal and cancerous prostate cells. Int J Hyperthermia 2010; 26:748-64. [DOI: 10.3109/02656736.2010.486778] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
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40
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Stamatakos G, Kolokotroni E, Dionysiou D, Georgiadi E, Desmedt C. An advanced discrete state–discrete event multiscale simulation model of the response of a solid tumor to chemotherapy: Mimicking a clinical study. J Theor Biol 2010; 266:124-39. [DOI: 10.1016/j.jtbi.2010.05.019] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2009] [Revised: 03/29/2010] [Accepted: 05/14/2010] [Indexed: 12/24/2022]
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Inoue H, Uyama T, Hayashi J, Watanabe A, Kobayashi KI, Tadokoro T, Yamamoto Y. N-Formyl-3,4-methylenedioxy-benzylidene-gamma-butyrolaetam, KNK437 induces caspase-3 activation through inhibition of mTORC1 activity in Cos-1 cells. Biochem Biophys Res Commun 2010; 395:56-60. [PMID: 20350529 DOI: 10.1016/j.bbrc.2010.03.134] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2010] [Accepted: 03/20/2010] [Indexed: 01/12/2023]
Abstract
The mammalian target of rapamycin complex 1 (mTORC1: mTOR-raptor interaction) and heat shock protein 70 (Hsp70) regulate various cellular processes and are crucial for the progression of many cancers and metabolic diseases. In the recent study, we reported that interaction of Hsp70 with tuberous sclerosis complex 1 (TSC1) regulated apoptosis. This study was designed to elucidate the underlying mechanism in Cos-1 cells. Here, we show that N-formyl-3,4-methylenedioxy-benzylidene-gamma-butyrolaetam (KNK437), which inhibits the expression level of Hsp70, abrogated phosphorylation of mTOR and S6K in response to insulin, and inhibited mTORC1 activity via disruption of an interaction between mTOR and raptor. In addition, KNK437 did not alter TSC1/2 complex formation. Furthermore, KNK437 inhibited the mTOR-raptor interaction on the outer membrane of the mitochondria and triggered caspase-3 activation. A reduction in the level of Hsp70 could result in the inhibition of the mTORC1 signaling pathway, thereby inducing apoptosis.
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Affiliation(s)
- Hirofumi Inoue
- Department of Applied Biology and Chemistry, Tokyo University of Agriculture, 1-1-1 Sakuragaoka, Setagaya-ku, Tokyo 156-8502, Japan
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Lu S, Tan Z, Wortman M, Lu S, Dong Z. Regulation of heat shock protein 70-1 expression by androgen receptor and its signaling in human prostate cancer cells. Int J Oncol 2010; 36:459-467. [PMID: 20043082 PMCID: PMC2929386] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/28/2023] Open
Abstract
Heat shock protein (hsp) 70-1 (hsp70-1) is overexpressed in human prostate cancer cells and may play important roles in prostate cancer resistance to conventional therapies. The purpose of this study was to investigate whether androgen receptor (AR) and its signaling regulate hsp70-1 expression. Several lines of AR-positive (LNCaP, LAPC-4, and 22Rv1) and -negative (PC-3, DU145, WPE1-NB14 and WPE1-NB-26) human prostatic cells were used in the study. Dihydrotestosterone (DHT) enhanced hsp70-1 expression in LNCaP cells. Expression of hsp70-1 in LNCaP cells was downregulated by the anti-androgens bicalutamide (Bic), and flutamide (Flut), and a newly identified AR signaling antagonist DL3. The downregulation of hsp70-1 by DL3 was also observed in LAPC-4 and 22Rv1 cells, but not in the four lines of AR-negative cells examined. Expression of hsp70-1 was also reduced by DL3 in PC-3 cells engineered with AR. On the other hand, knocking down AR in LNCaP cells by siRNA moderately reduced hsp70-1 level and abolished effects of DL3 on hsp70-1 expression. DL3 reduced hsp70-1 mRNA synthesis in cells and its in vitro gene transcription but did not significantly alter the stabilities of hsp70-1 mRNA and protein. Chromatin-immunoprecipitation (ChIP) assay showed that AR bound to the promoter region of HSPA1B gene, which was reduced in cells treated with DL3 or Bic. These data suggest that AR and its signaling regulate hsp70-1 expression in prostate cancer cells and that HSPA1B could be an AR target gene.
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Affiliation(s)
- Shan Lu
- Department of Internal Medicine, The University of Cincinnati College of Medicine, Cincinnati, OH 45267, USA
| | - Zongqin Tan
- Department of Internal Medicine, The University of Cincinnati College of Medicine, Cincinnati, OH 45267, USA
| | - Matt Wortman
- Department of Cancer and Cell Biology, The University of Cincinnati College of Medicine, Cincinnati, OH 45267, USA
| | - Shan Lu
- Department of Pathology and Laboratory Medicine, The University of Cincinnati College of Medicine, Cincinnati, OH 45267, USA
| | - Zhongyun Dong
- Department of Internal Medicine, The University of Cincinnati College of Medicine, Cincinnati, OH 45267, USA
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43
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Phosphorylated hamartin–Hsp70 complex regulates apoptosis via mitochondrial localization. Biochem Biophys Res Commun 2010; 391:1148-53. [DOI: 10.1016/j.bbrc.2009.12.054] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2009] [Accepted: 12/09/2009] [Indexed: 11/20/2022]
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Lee SE, Sasaki DY, Perroud TD, Yoo D, Patel KD, Lee LP. Biologically functional cationic phospholipid-gold nanoplasmonic carriers of RNA. J Am Chem Soc 2009; 131:14066-74. [PMID: 19746908 DOI: 10.1021/ja904326j] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Biologically functional cationic phospholipid-gold nanoplasmonic carriers have been designed to simultaneously exhibit carrier capabilities, demonstrate improved colloidal stability, and show no cytotoxicity under physiological conditions. Cargo, such as RNA, DNA, proteins, or drugs, can be adsorbed onto or incorporated into the cationic phospholipid bilayer membrane. These carriers are able to retain their unique nanoscale optical properties under physiological conditions, making them particularly useful in a wide range of imaging, therapeutic, and gene delivery applications that utilize selective nanoplasmonic properties.
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Affiliation(s)
- Somin Eunice Lee
- Biomolecular Nanotechnology Center, Department of Bioengineering, University of California-Berkeley, UCSF/UCB Joint Graduate Group in Bioengineering, Berkeley, California 94720-1762, USA
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Okayama T, Kokura S, Ishikawa T, Adachi S, Hattori T, Takagi T, Handa O, Naito Y, Yoshikawa T. Antitumor effect of pretreatment for colon cancer cells with hyperthermia plus geranylgeranylacetone in experimental metastasis models and a subcutaneous tumor model of colon cancer in mice. Int J Hyperthermia 2009; 25:141-9. [PMID: 19337914 DOI: 10.1080/02656730802631783] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
PURPOSE We examined whether hyperthermia attenuated the metastatic potential of colon cancer through the induction of heat shock protein 70 (Hsp70). MATERIALS AND METHODS Colon26 cells were separated into four groups: (1) no pretreatment, (2) hyperthermia at 42 degrees C for 1 hour, (3) pretreatment with geranylgeranylacetone (GGA) 10(-6) M for 2 hours, and (4) hyperthermia after GGA treatment. We measured cell viabilities and the contents of Hsp70. We assessed nuclear factor-kappa-B (NF-kappa-B) status with and without tumor necrosis factor-alpha (TNF-alpha) stimulation. For in vivo study, colon26 cells were injected via the tail vein or into a subcutaneous area of mice and the numbers of lung metastatic nodules or the volumes of subcutaneous tumors were assessed. Untreated cells were incubated with PKH26. Experimental metastasis models were then generated and used to assess the fixed cancer cells. RESULTS Tumor development in the subcutaneous tumor models and cell viabilities were similar among the four groups. However, the GGA plus hyperthermia group had fewer lung metastatic nodules in the experimental lung metastasis model and higher Hsp70 induction than the other cell groups. The GGA plus hyperthermia pretreatment group also showed a lower number of fixed cells in lungs and lower activation of NF-kappa-B by TNF-alpha than the other cell groups. CONCLUSIONS It is suggested the metastatic potential but not the proliferation potency of cancer cells is inhibited by the transient induction of Hsp70.
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Affiliation(s)
- Tetsuya Okayama
- Department of Inflammation and Immunology, Kyoto Prefectural University of Medicine, Kyoto, Japan
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Hsp70 is required for optimal cell proliferation in mouse A6 mesoangioblast stem cells. Biochem J 2009; 421:193-200. [DOI: 10.1042/bj20082309] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Mouse Hsp70 (70 kDa heat shock protein) is preferentially induced by heat or stress stimuli. We previously found that Hsp70 is constitutively expressed in A6 mouse mesoangioblast stem cells, but its possible role in these cells and the control of its basal transcription remained unexplored. Here we report that in the absence of stress, Ku factor is able to bind the HSE (heat shock element) consensus sequence in vitro, and in vivo it is bound to the proximal hsp70 promoter. In addition, we show that constitutive hsp70 transcription depends on the co-operative interaction of different factors such as Sp1 (specificity protein 1) and GAGA-binding protein with Ku factor, which binds the HSE consensus sequence. We used mRNA interference assays to select knockdown cell clones. These cells were able to respond to heat stress by producing a large amount of Hsp70, and produced the same amount of Hsp70 as that synthesized by stressed A6 cells. However, severe Hsp70 knockdown cells had a longer duplication time, suggesting that constitutive Hsp70 expression has an effect on the rate of proliferation.
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Liao Q, Zhao L, Chen X, Deng Y, Ding Y. Serum proteome analysis for profiling protein markers associated with carcinogenesis and lymph node metastasis in nasopharyngeal carcinoma. Clin Exp Metastasis 2008; 25:465-76. [PMID: 18357507 PMCID: PMC2413104 DOI: 10.1007/s10585-008-9152-8] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2007] [Accepted: 02/16/2008] [Indexed: 01/08/2023]
Abstract
Nasopharyngeal carcinoma (NPC), one of the most common cancers in population with Chinese or Asian progeny, poses a serious health problem for southern China. It is unfortunate that most NPC victims have had lymph node metastasis (LNM) when first diagnosed. We believe that the 2D based serum proteome analysis can be useful in discovering new biomarkers that may aid in the diagnosis and therapy of NPC patients. To filter the tumor specific antigen markers of NPC, sera from 42 healthy volunteers, 27 non-LNM NPC patients and 37 LNM NPC patients were selected for screening study using 2D combined with MS. Pretreatment strategy, including sonication, albumin and immunoglobulin G (IgG) depletion, was adopted for screening differentially expressed proteins of low abundance in serum. By 2D image analysis and MALDI-TOF-MS identification, twenty-three protein spots were differentially expressed. Three of them were further validated in the sera using enzyme-linked immunosorbent assay (ELISA). Our research demonstrates that HSP70, sICAM-1 and SAA, confirmed with ELISA at sera and immunohistochemistry, are potential NPC metastasis-specific serum biomarkers which may be of great underlying significance in clinical detection and management of NPC.
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Affiliation(s)
- Qiulin Liao
- Department of Pathology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, China
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Abstract
Heat shock proteins (Hsps) are highly conserved and inhabit nearly all subcellular locations where they perform a variety of chaperoning functions including folding and unfolding of nascent polypeptides, proteins, transport of proteins, and support of antigen presentation processes. Apart from their intracellular location Hsps with a molecular weight of 70 kDa (Hsp70) also have been found on the plasma membrane of malignantly transformed cells, on virally/bacterial infected cells and in the extracellular space. Depending on their intra- and extracellular location Hsps exert either protection against environmental stress or act as potent stimulators of the immune response. In this review we address the dual function of intracellular and extracellular located small Hsps and members of the Hsp70 family and its immunological consequences for cancer immunity.
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Affiliation(s)
- Michael Sherman
- Department of Biochemistry, Boston University School of Medicine, Massachusetts, USA
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Pyrimidinone-peptoid hybrid molecules with distinct effects on molecular chaperone function and cell proliferation. Bioorg Med Chem 2007; 16:3291-301. [PMID: 18164205 DOI: 10.1016/j.bmc.2007.12.014] [Citation(s) in RCA: 70] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2007] [Revised: 12/04/2007] [Accepted: 12/06/2007] [Indexed: 02/04/2023]
Abstract
The Hsp70 molecular chaperones are ATPases that play critical roles in the pathogenesis of many human diseases, including breast cancer. Hsp70 ATP hydrolysis is relatively weak but is stimulated by J domain-containing proteins. We identified pyrimidinone-peptoid hybrid molecules that inhibit cell proliferation with greater potency than previously described Hsp70 modulators. In many cases, anti-proliferative activity correlated with inhibition of J domain stimulation of Hsp70.
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