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Jin P, Xia M, Hasany M, Feng P, Bai J, Gao J, Zhang W, Mehrali M, Wang R. A tough injectable self‐setting cement‐based hydrogel for noninvasive bone augmentation. INTERDISCIPLINARY MATERIALS 2023; 2:771-788. [DOI: 10.1002/idm2.12119] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Accepted: 09/05/2023] [Indexed: 03/06/2025]
Abstract
AbstractComposite hydrogels with excellent properties can open new opportunities to terminate the need for auto/allografts in bone augmentations. However, their clinical application has been limited by their insufficient mechanical strength and lack of osteoinductivity. Here we report a new strategy to design an injectable bioactive double network hydrogel reinforced by inorganic calcium/magnesium phosphate cement (CMPC) hydrates to meet the mechanical performance requirements for bone regeneration. The engineered CMPC hydration endows the composite hydrogel with an appropriate gelation time and temperature for injection, which shows no harm in the defect site. CMPC hydrates could also provide a lower swelling ratio and higher biodegradation rate fitting the in vivo bone regeneration needs. In vitro and in vivo experiments prove that the ions released from inorganic particles endow biocompatibility, cell migration, adhesion, differentiation, and significantly higher bone regeneration capacity. Taken together, the simple addition of CMPC particles imparts in‐demand features that bring us closer to the clinical utilization of hydrogel‐based materials for bone regeneration.
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Affiliation(s)
- Peng Jin
- School of Materials Science and Engineering Nanjing China
- Jiangsu Key Laboratory of Construction Materials Southeast University Nanjing China
- Department of Civil and Mechanical Engineering Technical University of Denmark Kgs Lyngby Denmark
| | - Mingjie Xia
- Department of Orthopedics, Nanjing First Hospital Nanjing Medical University Nanjing China
| | - Masoud Hasany
- Department of Civil and Mechanical Engineering Technical University of Denmark Kgs Lyngby Denmark
| | - Pan Feng
- School of Materials Science and Engineering Nanjing China
- Jiangsu Key Laboratory of Construction Materials Southeast University Nanjing China
| | - Jing Bai
- School of Materials Science and Engineering Nanjing China
- Institution of Medical Devices (Suzhou) Southeast University Nanjing China
| | - Jian Gao
- School of Materials Science and Engineering Nanjing China
- Jiangsu Key Laboratory of Construction Materials Southeast University Nanjing China
| | - Wei Zhang
- School of Materials Science and Engineering Nanjing China
- Jiangsu Key Laboratory of Advanced Metallic Materials Southeast University Nanjing China
| | - Mehdi Mehrali
- Department of Civil and Mechanical Engineering Technical University of Denmark Kgs Lyngby Denmark
| | - Ruixing Wang
- School of Materials Science and Engineering Nanjing China
- Jiangsu Key Laboratory of Construction Materials Southeast University Nanjing China
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2
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Tarantino S, Caricato AP, Rinaldi R, Capomolla C, De Matteis V. Cancer Treatment Using Different Shapes of Gold-Based Nanomaterials in Combination with Conventional Physical Techniques. Pharmaceutics 2023; 15:500. [PMID: 36839822 PMCID: PMC9968101 DOI: 10.3390/pharmaceutics15020500] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Revised: 01/23/2023] [Accepted: 01/28/2023] [Indexed: 02/05/2023] Open
Abstract
The conventional methods of cancer treatment and diagnosis, such as radiotherapy, chemotherapy, and computed tomography, have developed a great deal. However, the effectiveness of such methods is limited to the possible failure or collateral effects on the patients. In recent years, nanoscale materials have been studied in the field of medical physics to develop increasingly efficient methods to treat diseases. Gold nanoparticles (AuNPs), thanks to their unique physicochemical and optical properties, were introduced to medicine to promote highly effective treatments. Several studies have confirmed the advantages of AuNPs such as their biocompatibility and the possibility to tune their shapes and sizes or modify their surfaces using different chemical compounds. In this review, the main properties of AuNPs are analyzed, with particular focus on star-shaped AuNPs. In addition, the main methods of tumor treatment and diagnosis involving AuNPs are reviewed.
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Affiliation(s)
- Simona Tarantino
- Department of Mathematics and Physics “E. De Giorgi”, University of Salento, Via Monteroni, 73100 Lecce, Italy
| | - Anna Paola Caricato
- Department of Mathematics and Physics “E. De Giorgi”, University of Salento, Via Monteroni, 73100 Lecce, Italy
- National Institute of Nuclear Physics (INFN), Section of Lecce, Via Monteroni, 73100 Lecce, Italy
| | - Rosaria Rinaldi
- Department of Mathematics and Physics “E. De Giorgi”, University of Salento, Via Monteroni, 73100 Lecce, Italy
| | - Caterina Capomolla
- “Vito Fazzi” Hospital of Lecce, Oncological Center, Piazza Filippo Muratore 1, 73100 Lecce, Italy
| | - Valeria De Matteis
- Department of Mathematics and Physics “E. De Giorgi”, University of Salento, Via Monteroni, 73100 Lecce, Italy
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3
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Analysis of Temperature Field in the Dielectrophoresis-Based Microfluidic Cell Separation Device. FLUIDS 2022. [DOI: 10.3390/fluids7080263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Cell separation techniques based on dielectrophoresis are of high interest as an effective method of performing cell separation non-invasively on cells. However, dielectrophoresis devices have the problem that cells in the device are exposed to a high-temperature environment due to the generation of Joule heat caused by high-voltage application and dielectric-loss heat when the applied voltage is AC voltage. There is concern that the heat generated in the device may affect cell viability, cell cycle and apoptosis induction. In this study, the temperature field inside the dielectrophoretic cell separation device was experimentally and numerically investigated. The temperature rise at the bottom of the flow channel in the device was measured using the LIF method, and the thermofluidal behavior of the device was numerically simulated by adopting a heat generation model that takes the Joule and dielectric-loss heating into account in the energy equation. The temperature rise in the device was evaluated and the effect of the heat generation on cells in the device is discussed.
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4
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Examination of the Effect of RF Field on Fe-MWCNTs and Their Application in Medicine. ELECTRONICS 2022. [DOI: 10.3390/electronics11132099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Carbon nanotubes are a material with excellent properties, which result in a wide range of possible applications, from electronics to medicine. This paper presents the investigation of the possibility of Fe-MWCNTs’ application as heating agents for targeted thermal ablation of cancer cells, which could lead to the development of an innovative cancer treatment method. The article describes the process of synthesis of multi-walled carbon nanotubes filled with iron (Fe-MWCNTs) and provides an examination of their magnetic properties. Fe-MWCNTs were synthesized by catalytic chemical vapor deposition (CCVD). Relevant properties of the nanoparticles in terms of functionalization for biomedical applications were exploited and their magnetic properties were investigated to determine the heat generation efficiency induced by exposure of the particles to an external electromagnetic field. The reaction of the samples was measured for 40 min of exposure. The results showed an increase in sample temperature that was proportional to the concentration.
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5
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Liu JF, Chen PC, Ling TY, Hou CH. Hyperthermia increases HSP production in human PDMCs by stimulating ROS formation, p38 MAPK and Akt signaling, and increasing HSF1 activity. Stem Cell Res Ther 2022; 13:236. [PMID: 35659731 PMCID: PMC9166587 DOI: 10.1186/s13287-022-02885-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Accepted: 02/02/2022] [Indexed: 11/29/2022] Open
Abstract
Background Human placenta-derived multipotent cells (hPDMCs) are isolated from a source uncomplicated by ethical issues and are ideal for therapeutic applications because of their capacity for multilineage differentiation and proven immunosuppressive properties. It is known that heat shock preconditioning induces the upregulation of heat shock proteins (HSPs), which enhance survival and engraftment of embryonic stem cells (ESCs) during transplantation in live animal models, although whether heat shock preconditioning has the same effects in hPDMCs is unclear. Methods The hPDMCs were isolated from placenta of healthy donors. The cells were treated with heat shock (43 °C, 15 min), followed by evaluation of cell viability. Furthermore, the HSPs expression was assessed by Western blot, qPCR. The reactive oxygen species (ROS) production and signal pathway activation were determined by flow cytometry and Western blot, respectively. The regulatory pathways involved in HSPs expression were examined by pretreatment with chemical inhibitors, and siRNAs of MAPK, Akt, and heat shock factor 1 (HSF1), followed by determination of HSPs expression. Results This study demonstrates that heat shock treatment induced ROS generation and HPSs expression in hPDMCs. Heat shock stimulation also increased p38 MAPK and Akt phosphorylation. These effects were reduced by inhibitors of ROS, p38 MAPK and Akt. Moreover, we found that heat shock treatment enhanced nuclear translocation of the HSF1 in hPDMCs, representing activation of HSF1. Pretreatment of hPDMCs with ROS scavengers, SB203580 and Akt inhibitors also reduced the translocation of HSF1 induced by heat shock. Conclusions Our data indicate that heat shock acts via ROS to activate p38 MAPK and Akt signaling, which subsequently activates HSF1, leading to HSP activation and contributing to the protective role of hPDMCs.
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Affiliation(s)
- Ju-Fang Liu
- School of Oral Hygiene, College of Oral Medicine, Taipei Medical University, Taipei, 110, Taiwan.,Department of Medical Research, China Medical University Hospital, China Medical University, Taichung, 404, Taiwan
| | - Po-Chun Chen
- Department of Life Science, National Taiwan Normal University, Taipei, 116, Taiwan.,Translational Medicine Center, Shin-Kong Wu Ho-Su Memorial Hospital, Taipei, 111, Taiwan.,Department of Medical Research, China Medical University Hospital, China Medical University, Taichung, 404, Taiwan
| | - Thai-Yen Ling
- Graduate Institute of Pharmacology, College of Medicine, National Taiwan University, Taipei, 106, Taiwan
| | - Chun-Han Hou
- Department of Orthopedic Surgery, National Taiwan University Hospital, No. 1, Jen-Ai Road, Taipei, 100, Taiwan.
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Yan J, Lai H, Zeng B, Wang L, Xing F, Xiao P. Photoinduced free radical-releasing systems and their anticancer properties. Photochem Photobiol Sci 2022; 21:1405-1417. [PMID: 35553411 DOI: 10.1007/s43630-022-00231-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Accepted: 04/11/2022] [Indexed: 11/26/2022]
Abstract
Cancer has been a serious threat and impact on the health and life of human. Phototherapy is considered as a promising therapeutic method to replace the traditional treatment in clinic owing to its noninvasive nature and high efficiency. Photoinitiators have long been used in the field of photopolymerization; however, few studies have been carried out on their potential as anticancer agents under light irradiation. In this study, the effect of a photoinitiator, diphenyl (2, 4, 6-trimethylbenzoyl) phosphine oxide (TPO), on breast cancer is investigated and the related mechanism is elucidated. It is found that TPO has low dark toxicity and significant phototoxicity. TPO can inhibit cell growth and development and promote cell apoptosis through a mitochondrial pathway under light irradiation. Further studies show that cell apoptosis is induced by free radicals produced from the photolysis of TPO to activate JNK phosphorylation. Overall, we identify the antitumor effects of TPO in vitro for the first time, and provides a proof of concept for its application as a novel photolatent therapeutic drug.
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Affiliation(s)
- Jieyu Yan
- Department of Immunobiology, College of Life Science and Technology, Jinan University, #601 Huangpu West Avenue, Guangzhou, 510632, China
| | - Haiwang Lai
- Department of Immunobiology, College of Life Science and Technology, Jinan University, #601 Huangpu West Avenue, Guangzhou, 510632, China.
| | - Boning Zeng
- Department of Immunobiology, College of Life Science and Technology, Jinan University, #601 Huangpu West Avenue, Guangzhou, 510632, China
| | - Liqing Wang
- Department of Immunobiology, College of Life Science and Technology, Jinan University, #601 Huangpu West Avenue, Guangzhou, 510632, China
| | - Feiyue Xing
- Department of Immunobiology, College of Life Science and Technology, Jinan University, #601 Huangpu West Avenue, Guangzhou, 510632, China.
- MOE Key Laboratory of Tumor Molecular Biology, Jinan University, Guangzhou, 510632, China.
| | - Pu Xiao
- Research School of Chemistry, The Australian National University, Canberra, ACT, 2601, Australia.
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7
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Wada H, Coutts V. Detrimental or beneficial? Untangling the literature on developmental stress studies in birds. J Exp Biol 2021; 224:272388. [PMID: 34608943 DOI: 10.1242/jeb.227363] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Developing animals display a tremendous ability to change the course of their developmental path in response to the environment they experience, a concept referred to as developmental plasticity. This change in behavior, physiology or cellular processes is primarily thought to allow animals to better accommodate themselves to the surrounding environment. However, existing data on developmental stress and whether it brings about beneficial or detrimental outcomes show conflicting results. There are several well-referred hypotheses related to developmental stress in the current literature, such as the environmental matching, silver spoon and thrifty phenotype hypotheses. These hypotheses speculate that the early-life environment defines the capacity of the physiological functions and behavioral tendencies and that this change is permanent and impacts the fitness of the individual. These hypotheses also postulate there is a trade-off among organ systems and physiological functions when resources are insufficient. Published data on avian taxa show that some effects of developmental nutritional and thermal stressors are long lasting, such as the effects on body mass and birdsong. Although hypotheses on developmental stress are based on fitness components, data on reproduction and survival are scarce, making it difficult to determine which hypothesis these data support. Furthermore, most physiological and performance measures are collected only once; thus, the physiological mechanisms remain undertested. Here, we offer potential avenues of research to identify reasons behind the contrasting results in developmental stress research and possible ways to determine whether developmental programming due to stressors is beneficial or detrimental, including quantifying reproduction and survival in multiple environments, measuring temporal changes in physiological variables and testing for stress resistance later in life.
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Affiliation(s)
- Haruka Wada
- Department of Biological Sciences, Auburn University, Auburn, AL 36849, USA
| | - Victoria Coutts
- Department of Biological Sciences, Auburn University, Auburn, AL 36849, USA
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8
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Zhang X, Liu X, Zhang Y, Yang A, Zhang Y, Tong Z, Wang Y, Qiu Y. Wan-Nian-Qing, a Herbal Composite Prescription, Suppresses the Progression of Liver Cancer in Mice by Regulating Immune Response. Front Oncol 2021; 11:696282. [PMID: 34307161 PMCID: PMC8297951 DOI: 10.3389/fonc.2021.696282] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2021] [Accepted: 06/08/2021] [Indexed: 01/10/2023] Open
Abstract
The Wan-Nian-Qing prescription (WNQP), an herbal composite containing Ornithogalum caudatum, has been used in China for several years for cancer treatment. However, the mechanism of its pharmacological action against liver cancer is not clear. This study aimed to investigate the role of WNQP in inhibiting tumor growth in hepatocellular carcinoma model mice and determine its mechanism of action. We established HepG2- and SMMC-7721-xenografted tumor models in nude mice and BALB/c mice. The mice were administered WNQP for 2 weeks. The bodyweight of each mouse was monitored every day, and the tumor size was measured using vernier caliper before each round of WNQP administration. After the last dose, mice were sacrificed. The tumors were removed, lysed, and subjected to proteome profiling, enzyme-linked immunosorbent assay, and western blotting. The liver, spleen, and kidney were collected for histopathological examination. The effects of WNQP against liver cancer were first systematically confirmed in HepG2- and SMMC-7721-xenografted nude mice and BALB/c mice models. WNQP inhibited tumor growth, but failed to affect bodyweight and organ structures (liver and spleen), confirming that it was safe to use in mice. In BALB/c mice, WNQP regulated immune function, inferred from the modulation of immune-related cytokines such as interleukins, interferon, tumor necrosis factors, and chemokines. Further results confirmed that this regulation occurred via the regulatory effects of WNQP on Nrf2 signaling. WNQP can inhibit the growth of HepG2- and SMMC-7721-xenografted tumors in nude mice and BALB/c mice. This effect manifests at least partially through immunomodulation mediated apoptosis.
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Affiliation(s)
- Xinrui Zhang
- Department of Pharmacy, Changchun University of Chinese Medicine, Changchun, China.,School of Life Sciences, Jilin University, Changchun, China
| | - Xin Liu
- School of Life Sciences, Jilin University, Changchun, China
| | - Yue Zhang
- Department of Pharmacy, Changchun University of Chinese Medicine, Changchun, China.,School of Life Sciences, Jilin University, Changchun, China
| | - Anhui Yang
- School of Life Sciences, Jilin University, Changchun, China
| | - Yongfeng Zhang
- School of Life Sciences, Jilin University, Changchun, China
| | - Zhijun Tong
- R&D Department, Jilin Tianlitai Pharmaceutical Co. Ltd, Baishan, China
| | - Yingwu Wang
- School of Life Sciences, Jilin University, Changchun, China
| | - Ye Qiu
- Department of Pharmacy, Changchun University of Chinese Medicine, Changchun, China
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9
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Inhibition of HSF1 and SAFB Granule Formation Enhances Apoptosis Induced by Heat Stress. Int J Mol Sci 2021; 22:ijms22094982. [PMID: 34067147 PMCID: PMC8124827 DOI: 10.3390/ijms22094982] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Revised: 04/13/2021] [Accepted: 05/05/2021] [Indexed: 12/12/2022] Open
Abstract
Stress resistance mechanisms include upregulation of heat shock proteins (HSPs) and formation of granules. Stress-induced granules are classified into stress granules and nuclear stress bodies (nSBs). The present study examined the involvement of nSB formation in thermal resistance. We used chemical compounds that inhibit heat shock transcription factor 1 (HSF1) and scaffold attachment factor B (SAFB) granule formation and determined their effect on granule formation and HSP expression in HeLa cells. We found that formation of HSF1 and SAFB granules was inhibited by 2,5-hexanediol. We also found that suppression of HSF1 and SAFB granule formation enhanced heat stress-induced apoptosis. In addition, the upregulation of HSP27 and HSP70 during heat stress recovery was suppressed by 2,5-hexanediol. Our results suggested that the formation of HSF1 and SAFB granules was likely to be involved in the upregulation of HSP27 and HSP70 during heat stress recovery. Thus, the formation of HSF1 and SAFB granules was involved in thermal resistance.
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10
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Dyne E, Prakash PS, Li J, Yu B, Schmidt TL, Huang S, Kim MH. Mild magnetic nanoparticle hyperthermia promotes the disaggregation and microglia-mediated clearance of beta-amyloid plaques. NANOMEDICINE-NANOTECHNOLOGY BIOLOGY AND MEDICINE 2021; 34:102397. [PMID: 33857686 DOI: 10.1016/j.nano.2021.102397] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Accepted: 03/18/2021] [Indexed: 12/19/2022]
Abstract
The formation of beta-amyloid (Aβ) plaques is a classical hallmark of Alzheimer's disease (AD) that is associated with the promotion of neuroinflammation and subsequent neurotoxicity. Given the limited therapeutic options for targeting and clearing Aβ plaques in AD, there is an urgent need to develop effective approaches to reduce plaque accumulation. The objective of this study was to validate mild magnetic nanoparticle (MNP) hyperthermia technology as a strategy to clear Aβ deposits and determine the impact on microglia functionality. Our results demonstrated that the heating of MNPs localized to Aβ aggregates upon exposure to high frequency alternating magnetic field (AMF) was sufficient to disrupt Aβ plaques, resulting in its fragmentation. Importantly, this could facilitate the phagocytic clearance of Aβ as well as attenuate pro-inflammatory responses by human microglial cells. Our results support the feasibility of mild MNP/AMF hyperthermia as a new strategy for reducing beta-amyloid burdens in Alzheimer's disease.
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Affiliation(s)
- Eric Dyne
- School of Biomedical Sciences, Kent State University, Kent, OH, USA
| | - Praneetha Sundar Prakash
- School of Biomedical Sciences, Kent State University, Kent, OH, USA; Department of Physics, Kent State University, Kent, OH, USA
| | - Junfeng Li
- Department of Chemistry and Biochemistry, Kent State University, Kent, OH, USA
| | - Bing Yu
- Department of Biological Sciences, Kent State University, Kent, OH, USA
| | - Thorsten-Lars Schmidt
- School of Biomedical Sciences, Kent State University, Kent, OH, USA; Department of Physics, Kent State University, Kent, OH, USA
| | - Songping Huang
- Department of Chemistry and Biochemistry, Kent State University, Kent, OH, USA
| | - Min-Ho Kim
- School of Biomedical Sciences, Kent State University, Kent, OH, USA; Department of Biological Sciences, Kent State University, Kent, OH, USA.
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11
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Shehata AM, Saadeldin IM, Tukur HA, Habashy WS. Modulation of Heat-Shock Proteins Mediates Chicken Cell Survival against Thermal Stress. Animals (Basel) 2020; 10:E2407. [PMID: 33339245 PMCID: PMC7766623 DOI: 10.3390/ani10122407] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2020] [Revised: 12/11/2020] [Accepted: 12/15/2020] [Indexed: 12/14/2022] Open
Abstract
Heat stress is one of the most challenging environmental stresses affecting domestic animal production, particularly commercial poultry, subsequently causing severe yearly economic losses. Heat stress, a major source of oxidative stress, stimulates mitochondrial oxidative stress and cell dysfunction, leading to cell damage and apoptosis. Cell survival under stress conditions needs urgent response mechanisms and the consequent effective reinitiation of cell functions following stress mitigation. Exposure of cells to heat-stress conditions induces molecules that are ready for mediating cell death and survival signals, and for supporting the cell's tolerance and/or recovery from damage. Heat-shock proteins (HSPs) confer cell protection against heat stress via different mechanisms, including developing thermotolerance, modulating apoptotic and antiapoptotic signaling pathways, and regulating cellular redox conditions. These functions mainly depend on the capacity of HSPs to work as molecular chaperones and to inhibit the aggregation of non-native and misfolded proteins. This review sheds light on the key factors in heat-shock responses for protection against cell damage induced by heat stress in chicken.
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Affiliation(s)
- Abdelrazeq M. Shehata
- Department of Animal Production, Faculty of Agriculture, Al-Azhar University, Cairo 11651, Egypt;
- Department of Dairy Science and Food Technology, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi 221005, India
| | - Islam M. Saadeldin
- Department of Animal Production, College of Food and Agricultural Sciences, King Saud University, Riyadh 11451, Saudi Arabia;
| | - Hammed A. Tukur
- Department of Animal Production, College of Food and Agricultural Sciences, King Saud University, Riyadh 11451, Saudi Arabia;
| | - Walid S. Habashy
- Department of Animal and Poultry Production, Damanhour University, Damanhour 22511, Egypt;
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12
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An injectable bioactive magnesium phosphate cement incorporating carboxymethyl chitosan for bone regeneration. Int J Biol Macromol 2020; 160:101-111. [DOI: 10.1016/j.ijbiomac.2020.05.161] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2020] [Revised: 05/17/2020] [Accepted: 05/19/2020] [Indexed: 02/07/2023]
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13
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Chong JR, Le DL, Sato H, Sou K. Nanocapsule pH Regulator: Sustained Continuous Alkali Release from Thermosensitive Liposomes Reduces Acid Erosion. ACS APPLIED MATERIALS & INTERFACES 2020; 12:21463-21469. [PMID: 32295336 DOI: 10.1021/acsami.0c03814] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Thermosensitive liposomes are major drug delivery carriers, which enable targeting of drugs and burst release of the drugs from the liposomes at the site of action by applying a local heat stimulation above body temperature. Although the burst release is significant for a one-shot high-rate release of drugs at the target site, this type of release has a limited sustained action of the drugs. In this study, we report the alkali-encapsulating thermosensitive liposomes enabling environment pH regulation by sustained continuous cargo release at human body temperature. The liposomes encapsulating alkalis successfully neutralized the environmental acids for hours by releasing the alkalis and prevented acid erosion of hydroxyapatite matrix. Taken together, the present liposomes are effective for the sustained release of cargo at body temperature, specifically the alkali-encapsulating liposomes can be a preventing agent for dental caries in the oral cavity. The sustained release under endogenous body heat characteristics of thermosensitive liposomes showcased in this study can also be extended for prolonged intravenous drug exposure from targeted liposomal drug nanotherapeutics in the near future.
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Affiliation(s)
- Jian Rong Chong
- School of Mechanical & Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798 Singapore
| | - Duc Long Le
- School of Mechanical & Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798 Singapore
| | - Hirotaka Sato
- School of Mechanical & Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798 Singapore
| | - Keitaro Sou
- School of Mechanical & Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798 Singapore
- Research Institute for Science and Engineering, Waseda University, 3-4-1 Ohkubo, Shinjuku, Tokyo 169-8555, Japan
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14
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Principles and applications of nanomaterial-based hyperthermia in cancer therapy. Arch Pharm Res 2020; 43:46-57. [PMID: 31993968 DOI: 10.1007/s12272-020-01206-5] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Accepted: 01/09/2020] [Indexed: 12/19/2022]
Abstract
Over the past few decades, hyperthermia therapy (HTT) has become one of the most promising strategies to treat cancer. HTT has been applied with nanotechnology to overcome drawbacks such as non-selectivity and invasiveness and to maximize therapeutic efficacy. The high temperature of HTT induces protein denaturation that leads to apoptosis or necrosis. It can also enhance the effects of other cancer therapies because heat-damaged tissues reduce radioresistance and help accumulate anticancer drugs. Gold nanoparticles and superparamagnetic iron oxide with different energy sources are commonly used as hyperthermia agents. New types of nanoparticles such as those whose surface is coated with several polymers and those modified with targeting moieties have been studied as novel HTT agents. In this review, we introduce principles and applications of nanotechnology-based HTT using gold nanoparticles and superparamagnetic iron oxide.
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15
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Saadeldin IM, Swelum AAA, Elsafadi M, Mahmood A, Osama A, Shikshaky H, Alfayez M, Alowaimer AN, Magdeldin S. Thermotolerance and plasticity of camel somatic cells exposed to acute and chronic heat stress. J Adv Res 2019; 22:105-118. [PMID: 31969994 PMCID: PMC6965514 DOI: 10.1016/j.jare.2019.11.009] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2019] [Revised: 11/05/2019] [Accepted: 11/19/2019] [Indexed: 12/12/2022] Open
Abstract
The Arabian camel is the largest known mammal that can survive in severe hot climatic conditions. We provide the molecular explanation for the thermotolerance of camel granulosa somatic cells after exposure to 45 °C for 2 (acute heat shock) or 20 h (chronic heat shock). The common features of the cellular responses to acute heat stress were the increase of heat shock proteins and DNA repair enzymes expression. Actin polymerization and Rho signaling were critically activated as a cellular defense against heat shock. Cells exposed to chronic heat shock showed altered cell architecture with a decrease in total detected proteins, metabolic enzymes, and cytoskeletal protein expression. Treatment with transforming growth factor beta (TGFβ) pathway inhibitor SB-431542 suppressed the morphological alterations of cells exposed to chronic heat shock. Moreover, during the recovery stage at 38 °C for 24 h, proteomic changes were partially restored with an exponential increase in HSP70 expression, and the cells restored their normal cellular morphology on the 9th day of recovery. Full proteomics data are available via ProteomeXchange with identifier PXD012159. The strategies of cellular defense and tolerance to both thermal conditions reflect the flexible adaptability of camel somatic cells to conserve life under extremely hot conditions.
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Key Words
- Actin
- Anastasis
- CB, Cytochalasin B
- Camel
- GSH, reduced glutathione
- HSPs
- HSPs, heat shock proteins
- IDA, information dependent acquisition
- MDA, malondialdehyde
- Proteomics
- RI, ROCK-inhibitor
- ROCK
- ROCKs, Rho-associated protein kinases
- TGFβ
- TGFβ, transforming growth factor beta
- TIC, total ion chromatography
- Y-27632, ROCK-inhibitor Y-27632
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Affiliation(s)
- Islam M Saadeldin
- Department of Animal Production, College of Food and Agricultural Sciences, King Saud University, 11451 Riyadh, Saudi Arabia.,Department of Physiology, Faculty of Veterinary Medicine, Zagazig University, 44519 Zagazig, Egypt
| | - Ayman Abdel-Aziz Swelum
- Department of Animal Production, College of Food and Agricultural Sciences, King Saud University, 11451 Riyadh, Saudi Arabia.,Department of Theriogenology, Faculty of Veterinary Medicine, Zagazig University, 44519 Zagazig, Egypt
| | - Mona Elsafadi
- Stem Cell Unit, Department of Anatomy, College of Medicine, King Saud University, Riyadh, Saudi Arabia
| | - Amer Mahmood
- Stem Cell Unit, Department of Anatomy, College of Medicine, King Saud University, Riyadh, Saudi Arabia
| | - Aya Osama
- Proteomics and Metabolomics Unit, 57357 Children's Cancer Hospital, Cairo, Egypt
| | - Hassan Shikshaky
- Proteomics and Metabolomics Unit, 57357 Children's Cancer Hospital, Cairo, Egypt
| | - Musaad Alfayez
- Stem Cell Unit, Department of Anatomy, College of Medicine, King Saud University, Riyadh, Saudi Arabia.,Saudi Society for Camel Research, King Saud University, Saudi Arabia
| | - Abdullah N Alowaimer
- Department of Animal Production, College of Food and Agricultural Sciences, King Saud University, 11451 Riyadh, Saudi Arabia
| | - Sameh Magdeldin
- Proteomics and Metabolomics Unit, 57357 Children's Cancer Hospital, Cairo, Egypt.,Physiology Department, Faculty of Veterinary Medicine, Suez Canal University, Ismailia, Egypt
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16
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Kwon YM, Je JY, Cha SH, Oh Y, Cho WH. Synergistic combination of chemo‑phototherapy based on temozolomide/ICG‑loaded iron oxide nanoparticles for brain cancer treatment. Oncol Rep 2019; 42:1709-1724. [PMID: 31436296 PMCID: PMC6775808 DOI: 10.3892/or.2019.7289] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2018] [Accepted: 06/24/2019] [Indexed: 12/12/2022] Open
Abstract
Chemo‑photothermal therapy for cancer treatment has received increasing attention due to its selective therapeutic effects. In the present study, the anticancer effects of drug‑loaded Fe3O4 magnetic nanoparticles (MNPs) by chemo‑photothermal therapy on U‑87 MG human glioblastoma cells was investigated. Anticancer drug‑loaded Fe3O4 MNPs were prepared by loading temozolomide (TMZ) and indocyanine green (ICG), and were characterized by X‑ray diffraction, UV‑vis spectroscopy, thermal gravimetric analysis, transmission electron microscope, as well as drug‑loading capacity. Following treatment with near‑infrared (NIR) light irradiation, the administration of Fe3O4‑TMZ‑ICG MNPs resulted in the apoptosis of U‑87 MG glioblastoma cells through the generation of reactive oxygen species. Western blot analysis and reverse transcription‑quantitative polymerase chain reaction revealed that Fe3O4‑TMZ‑ICG MNPs with NIR laser irradiation lead to significantly enhanced anticancer effects on U‑87 MG glioblastoma cells through the modulation of intrinsic and extrinsic apoptosis genes, including Bcl‑2‑associated X protein, Bcl‑2, cytochrome c, caspase‑3, Fas associated via death domain and caspase‑8. These results suggest that Fe3O4‑TMZ‑ICG MNPs may be potential candidates when administered as chemo‑phototherapy for the treatment of brain cancer.
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Affiliation(s)
- Young Min Kwon
- Department of Neurosurgery, Dong-A University College of Medicine and Dong-A Medical Center, Busan 49201, Republic of Korea
| | - Jae-Young Je
- Department of Marine-Bio Convergence Science, Pukyong National University, Busan 48547, Republic of Korea
| | - Seung Heon Cha
- Department of Neurosurgery and Medical Research Institute, Pusan National University Hospital and Pusan National University School of Medicine, Busan 49241, Republic of Korea
| | - Yunok Oh
- Department of Marine-Bio Convergence Science, Pukyong National University, Busan 48547, Republic of Korea
| | - Won Ho Cho
- Department of Neurosurgery and Medical Research Institute, Pusan National University Hospital and Pusan National University School of Medicine, Busan 49241, Republic of Korea
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17
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Saadeldin IM, Swelum AAA, Tukur HA, Alowaimer AN. Thermotolerance of camel (Camelus dromedarius) somatic cells affected by the cell type and the dissociation method. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:29490-29496. [PMID: 31435907 DOI: 10.1007/s11356-019-06208-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Accepted: 08/13/2019] [Indexed: 06/10/2023]
Abstract
Researchers dealing with heat stress experiments use different cell kinds and use trypsin that has been reported to affect the cellular proteins of cultured cells. Therefore, we compared the effects of acute and chronic exposures to high temperature (45 °C) on camel skin fibroblast and granulosa cells. Primary culture of fibroblasts and granulosa cells tolerated the acute heat shock for 2 h; however, granulosa cells cultured for long duration (20 h) showed thermotolerance when compared with the fibroblasts. Moreover, the effect of cell dispersion method (trypsin and mechanical dissociation) on the thermotolerance of sub-cultured cells was examined. Trypsin altered the morphology of fibroblasts and granulosa cells exposed to 45 °C for 4 h. Moreover, trypsin significantly reduced the fibroblast and granulosa cell migration in the wound healing assay. The current results demonstrate that cell passaging and cell type can affect the thermotolerance of the cells; it also revealed that trypsin could alter the cellular response to the heat shock. We raise the demand for another alternative method for cell dispersion in experiments dealing with cellular responses to the heat shock.
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Affiliation(s)
- Islam M Saadeldin
- Department of Animal Production, College of Food and Agricultural Sciences, King Saud University, Riyadh, 11451, Kingdom of Saudi Arabia.
- Department of Physiology, Faculty of Veterinary Medicine, Zagazig University, Zagazig, 44519, Egypt.
| | - Ayman Abdel-Aziz Swelum
- Department of Animal Production, College of Food and Agricultural Sciences, King Saud University, Riyadh, 11451, Kingdom of Saudi Arabia
- Department of Theriogenology, Faculty of Veterinary Medicine, Zagazig University, Zagazig, 44519, Egypt
| | - Hammed A Tukur
- Department of Animal Production, College of Food and Agricultural Sciences, King Saud University, Riyadh, 11451, Kingdom of Saudi Arabia
| | - Abdullah N Alowaimer
- Department of Animal Production, College of Food and Agricultural Sciences, King Saud University, Riyadh, 11451, Kingdom of Saudi Arabia
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18
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Toma-Jonik A, Vydra N, Janus P, Widłak W. Interplay between HSF1 and p53 signaling pathways in cancer initiation and progression: non-oncogene and oncogene addiction. Cell Oncol (Dordr) 2019; 42:579-589. [DOI: 10.1007/s13402-019-00452-0] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/13/2019] [Indexed: 02/07/2023] Open
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19
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Mathematical Models of Cell Response Following Heating. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2018. [PMID: 30315551 DOI: 10.1007/978-3-319-96445-4_15] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register]
Abstract
The cells of the cardiovascular system can experience temperature excesses of a few degrees during a diseased state or of tens of degrees during a thermal therapy treatment. These raised temperatures may be acute or of long duration. The multiple cell lines that compose each tissue then react, in approximate order of increasing thermal insult, by expressing heat shock proteins, undergoing apoptosis, or suffering necrosis. Mathematical models of the response of cells could aid in planning and designing thermal therapies. The multi-factor nature of the cell response makes it challenging to develop such models. The models most used clinically are mathematically simple and based on the response of representative tissues. The model that might provide the most fundamental understanding of the biochemical response of cells requires many parameters, some of which are difficult to measure. None of the semi-empirical models that provide improved prediction of cell fate have been widely accepted to plan therapies. There remain great opportunities for developing mathematical models cell response.
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20
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A paper-based photothermal array using Parafilm to analyze hyperthermia response of tumour cells under local gradient temperature. Biomed Microdevices 2018; 20:68. [PMID: 30094581 DOI: 10.1007/s10544-018-0311-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Temperature is a critical extrinsic physical parameter that determines cell fate. Hyperthermia therapy has become an efficient treatment for tumor ablation. To understand the response of tumor cells under thermal shocks, we present a paper-based photothermal array that can be conveniently coupled with commercial 96-well cell culture plates. This paper chip device was fabricated in one step using Parafilm® and Kimwipers® based on a heat lamination strategy. Liquid was completely adsorbed and confined within the cellulose fibres of hydrophilic regions. Then, Prussian blue nanoparticles (PB NPs) as the photothermal initiator were introduced into the loading wells, and thermal energy was generated via near infrared (NIR) laser irradiation. After assembling the paper device with a 96-well plate, the temperature of each well could be individually controlled by varying the loading amount of PB NPs and laser irradiation time. As a proof-of-concept study, the effects of local thermal shocks on HeLa cells were investigated using MTT cell viability assay and Live/Dead cell staining. The variation of cell viability could be monitored in situ with controllable temperature elevation. The proposed paper photothermal array loaded with thermal initiators represents an enabling tool for investigating the hyperthermia responses of biological cells. Moreover, the facile fabrication technique for paper patterning is advantageous for customizing high-throughput microfluidic paper-based analytical devices (μPADs) with extremely low cost.
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21
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Lin FC, Hsu CH, Lin YY. Nano-therapeutic cancer immunotherapy using hyperthermia-induced heat shock proteins: insights from mathematical modeling. Int J Nanomedicine 2018; 13:3529-3539. [PMID: 29950833 PMCID: PMC6016258 DOI: 10.2147/ijn.s166000] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Nano-therapeutic utilizing hyperthermia therapy in combination with chemotherapy, surgery, and radiation is known to treat various types of cancer. These cancer treatments normally focus on reducing tumor burden. Nevertheless, it is still challenging to confine adequate thermal energy in a tumor and obtain a complete tumor ablation to avoid recurrence and metastasis while leaving normal tissues unaffected. Consequently, it is critical to attain an alternative tumor-killing mechanism to circumvent these challenges. Studies have demonstrated that extracellular heat shock proteins (HSPs) activate antitumor immunity during tumor cell necrosis. Such induced immunity was further shown to assist in regressing tumor and reducing recurrence and metastasis. However, only a narrow range of thermal dose is reported to be able to acquire the optimal antitumor immune outcome. Consequently, it is crucial to understand how extracellular HSPs are generated. MATERIALS AND METHODS In this work, a predictive model integrating HSP synthesis mechanism and cell death model is proposed to elucidate the HSP involvement in hyperthermia cancer immune therapy and its relation with dead tumor cells. This new model aims to provide insights into the thermally released extracellular HSPs by dead tumor cells for a more extensive set of conditions, including various temperatures and heating duration time. RESULTS Our model is capable of predicting the optimal thermal parameters to generate maximum HSPs for stimulating antitumor immunity, promoting tumor regression, and reducing metastasis. The obtained nonlinear relation between extracellular HSP concentration and increased dead cell number, along with rising temperature, shows that only a narrow range of thermal dose is able to generate the optimal antitumor immune result. CONCLUSION Our predictive model is capable of predicting the optimal temperature and exposure time to generate HSPs involved in the antitumor immune activation, with a goal to promote tumor regression and reduce metastasis.
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Affiliation(s)
- Fang-Chu Lin
- Department of Chemistry and Biochemistry, University of California, Los Angeles, CA, USA
| | - Chao-Hsiung Hsu
- Department of Chemistry and Biochemistry, University of California, Los Angeles, CA, USA
| | - Yung-Ya Lin
- Department of Chemistry and Biochemistry, University of California, Los Angeles, CA, USA
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22
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Saadeldin IM, Swelum AAA, Elsafadi M, Mahmood A, Alfayez M, Alowaimer AN. Differences between the tolerance of camel oocytes and cumulus cells to acute and chronic hyperthermia. J Therm Biol 2018; 74:47-54. [DOI: 10.1016/j.jtherbio.2018.03.014] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2018] [Revised: 03/13/2018] [Accepted: 03/14/2018] [Indexed: 01/10/2023]
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23
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Vannozzi L, Iacovacci V, Menciassi A, Ricotti L. Nanocomposite thin films for triggerable drug delivery. Expert Opin Drug Deliv 2018. [PMID: 29521583 DOI: 10.1080/17425247.2018.1451512] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
INTRODUCTION Traditional drug release systems normally rely on a passive delivery of therapeutic compounds, which can be partially programmed, prior to injection or implantation, through variations in the material composition. With this strategy, the drug release kinetics cannot be remotely modified and thus adapted to changing therapeutic needs. To overcome this issue, drug delivery systems able to respond to external stimuli are highly desirable, as they allow a high level of temporal and spatial control over drug release kinetics, in an operator-dependent fashion. AREAS COVERED On-demand drug delivery systems actually represent a frontier in this field and are attracting an increasing interest at both research and industrial level. Stimuli-responsive thin films, enabled by nanofillers, hold a tremendous potential in the field of triggerable drug delivery systems. The inclusion of responsive elements in homogeneous or heterogeneous thin film-shaped polymeric matrices strengthens and/or adds intriguing properties to conventional (bare) materials in film shape. EXPERT OPINION This Expert Opinion review aims to discuss the approaches currently pursued to achieve an effective on-demand drug delivery, through nanocomposite thin films. Different triggering mechanisms allowing a fine control on drug delivery are described, together with current challenges and possible future applications in therapy and surgery.
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Affiliation(s)
- Lorenzo Vannozzi
- a The BioRobotics Institute , Scuola Superiore Sant'Anna , Pontedera , Italy
| | - Veronica Iacovacci
- a The BioRobotics Institute , Scuola Superiore Sant'Anna , Pontedera , Italy
| | - Arianna Menciassi
- a The BioRobotics Institute , Scuola Superiore Sant'Anna , Pontedera , Italy
| | - Leonardo Ricotti
- a The BioRobotics Institute , Scuola Superiore Sant'Anna , Pontedera , Italy
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24
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Cell damage produced by magnetic fluid hyperthermia on microglial BV2 cells. Sci Rep 2017; 7:8627. [PMID: 28819156 PMCID: PMC5561037 DOI: 10.1038/s41598-017-09059-7] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2017] [Accepted: 07/19/2017] [Indexed: 02/07/2023] Open
Abstract
We present evidence on the effects of exogenous heating by water bath (WB) and magnetic hyperthermia (MHT) on a glial micro-tumor phantom. To this, magnetic nanoparticles (MNPs) of 30-40 nm were designed to obtain particle sizes for maximum heating efficiency. The specific power absorption (SPA) values (f = 560 kHz, H = 23.9 kA/m) for as prepared colloids (533-605 W/g) dropped to 98-279 W/g in culture medium. The analysis of the intracellular MNPs distribution showed vesicle-trapped MNPs agglomerates spread along the cytoplasm, as well as large (~0.5-0.9 μm) clusters attached to the cell membrane. Immediately after WB and MHT (T = 46 °C for 30 min) the cell viability was ≈70% and, after 4.5 h, decreased to 20-25%, demonstrating that metabolic processes are involved in cell killing. The analysis of the cell structures after MHT revealed a significant damage of the cell membrane that is correlated to the location of MNPs clusters, while local cell damage were less noticeable after WB without MNPs. In spite of the similar thermal effects of WB and MHT on the cell viability, our results suggest that there is an additional mechanism of cell damage related to the presence of MNPs at the intracellular space.
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25
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Taye M, Lee W, Caetano-Anolles K, Dessie T, Hanotte O, Mwai OA, Kemp S, Cho S, Oh SJ, Lee HK, Kim H. Whole genome detection of signature of positive selection in African cattle reveals selection for thermotolerance. Anim Sci J 2017; 88:1889-1901. [PMID: 28748670 DOI: 10.1111/asj.12851] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2016] [Accepted: 04/20/2017] [Indexed: 12/11/2022]
Abstract
As African indigenous cattle evolved in a hot tropical climate, they have developed an inherent thermotolerance; survival mechanisms include a light-colored and shiny coat, increased sweating, and cellular and molecular mechanisms to cope with high environmental temperature. Here, we report the positive selection signature of genes in African cattle breeds which contribute for their heat tolerance mechanisms. We compared the genomes of five indigenous African cattle breeds with the genomes of four commercial cattle breeds using cross-population composite likelihood ratio (XP-CLR) and cross-population extended haplotype homozygosity (XP-EHH) statistical methods. We identified 296 (XP-EHH) and 327 (XP-CLR) positively selected genes. Gene ontology analysis resulted in 41 biological process terms and six Kyoto Encyclopedia of Genes and Genomes pathways. Several genes and pathways were found to be involved in oxidative stress response, osmotic stress response, heat shock response, hair and skin properties, sweat gland development and sweating, feed intake and metabolism, and reproduction functions. The genes and pathways identified directly or indirectly contribute to the superior heat tolerance mechanisms in African cattle populations. The result will improve our understanding of the biological mechanisms of heat tolerance in African cattle breeds and opens an avenue for further study.
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Affiliation(s)
- Mengistie Taye
- Department of Agricultural Biotechnology and Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, Korea.,College of Agriculture and Environmental Sciences, Bahir Dar University, Bahir Dar, Ethiopia
| | - Wonseok Lee
- Department of Agricultural Biotechnology and Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, Korea
| | - Kelsey Caetano-Anolles
- Department of Agricultural Biotechnology and Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, Korea
| | - Tadelle Dessie
- International Livestock Research Institute (ILRI), Addis Ababa, Ethiopia
| | - Olivier Hanotte
- International Livestock Research Institute (ILRI), Addis Ababa, Ethiopia.,The University of Nottingham, School of Life Sciences, Nottingham, UK
| | - Okeyo Ally Mwai
- International Livestock Research Institute (ILRI), Nairobi, Kenya
| | - Stephen Kemp
- The Centre for Tropical Livestock Genetics and Health, The Roslin Institute, The University of Edinburgh, Midlothian, UK.,International Livestock Research Institute (ILRI), Nairobi, Kenya
| | - Seoae Cho
- C&K genomics, Seoul National University, Seoul, Korea
| | - Sung Jong Oh
- National Institute of Animal Science, RDA, Wanju, Korea
| | - Hak-Kyo Lee
- Department of Animal Biotechnology, The Animal Molecular Genetics & Breeding Center, Chonbuk National University, Jeonju, Korea
| | - Heebal Kim
- Department of Agricultural Biotechnology and Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, Korea.,C&K genomics, Seoul National University, Seoul, Korea.,Interdisciplinary Program in Bioinformatics, Seoul National University, Seoul, Korea.,Institute for Biomedical Sciences, Shinshu University, Nagano, Japan
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26
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Ota T, Nishida Y, Ikuta K, Kato R, Kozawa E, Hamada S, Sakai T, Ishiguro N. Heat-stimuli-enhanced osteogenesis using clinically available biomaterials. PLoS One 2017; 12:e0181404. [PMID: 28719650 PMCID: PMC5515435 DOI: 10.1371/journal.pone.0181404] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2017] [Accepted: 07/02/2017] [Indexed: 11/18/2022] Open
Abstract
A recent study reported that heat stress stimulates osteogenesis in an in vivo rat model using alginate gel and magnetite cationic liposomes. However, for clinical use, the efficacy for promoting osteogenesis needs to be investigated using clinically approved materials, and preferably with animals larger than rats. The aim of this study was to evaluate multiple heat stimuli-triggered osteogenesis in rat tibial defect models using already clinically applicable materials (Resovist® and REGENOS®) and determine the efficacy also in the rabbit. Fifty-eight rats and 10 rabbits were divided into two groups, respectively, with or without hyperthermia treatment at 45°C for 15 min. (hyperthermia; 20 rats once a week, 8 rats three times a week, 5 rabbits once a week, control; 30 rats and 5 rabbits). Micro-CT assessment at 4 weeks revealed that a significantly stimulated osteogenesis was observed in the once a week group of both rats and rabbits as compared to the control group (p = 0.018 and 0.036, respectively). In contrast, the three times a week group did not show enhanced osteogenesis. Histological examination and image analysis showed consistent results in which the area of mineralized bone formation in the once a week hyperthermia group was significantly increased compared with that in the control group at four weeks (rat; p = 0.026, rabbit; p = 0.031). Newly formed bone was observed in the grafted materials from the periphery toward the center, and more osteoclasts were found in the once a week group. Heat stress also induced enhanced alkaline phosphatase expression in cultured osteoblastic cells, MC3T3, in vitro (p = 0.03). On the other hand, heat stress had no obvious effects on chondrogenic differentiation using ATDC5 cells. Our study demonstrates that heat-stimuli with clinically applicable novel heating materials can promote significant osteogenesis, and may thus be a promising treatment option for diseases associated with bone defects.
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Affiliation(s)
- Takehiro Ota
- Department of Orthopaedic Surgery, Nagoya University Graduate School and School of Medicine, Nagoya, Japan
| | - Yoshihiro Nishida
- Department of Orthopaedic Surgery, Nagoya University Graduate School and School of Medicine, Nagoya, Japan
- * E-mail:
| | - Kunihiro Ikuta
- Department of Orthopaedic Surgery, Nagoya University Graduate School and School of Medicine, Nagoya, Japan
| | - Ryuji Kato
- Department of Basic Medical Sciences, Graduate School of Pharmaceutical Sciences, Nagoya University, Nagoya, Japan
| | - Eiji Kozawa
- Department of Orthopaedic Surgery, Nagoya University Graduate School and School of Medicine, Nagoya, Japan
| | - Shunsuke Hamada
- Department of Orthopaedic Surgery, Nagoya University Graduate School and School of Medicine, Nagoya, Japan
| | - Tomohisa Sakai
- Department of Orthopaedic Surgery, Nagoya University Graduate School and School of Medicine, Nagoya, Japan
| | - Naoki Ishiguro
- Department of Orthopaedic Surgery, Nagoya University Graduate School and School of Medicine, Nagoya, Japan
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27
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Suljević D, Martinović-Jukić A, Fočak M, Alijagić A, Rukavina D, Zahirović A. Hematological Importance of Pseudoeosinophilic Granulocytes in Acclimation of Common Carp (Cyprinus Carpio Linnaeus, 1758). MACEDONIAN VETERINARY REVIEW 2017. [DOI: 10.1515/macvetrev-2016-0091] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Abstract
Adaptation mechanisms as response to water content, oxygen level and pollutants are very important and they can be interpreted by hematological analysis. The aim of this study was the analysis of hematological and immune adaptations of common carp (Cyprinus carpio Linnaeus, 1758) to thermal stress. All specimens were divided into a control and experimental group. The control group of fish was exposed to a constant water temperature of 10°C. We induced thermal stress in experimental fish by gradually heating water to 28°C, held for 30 minutes and then comparing the obtained results with the control fish. Short-term hyperthermia lead to an increase of the number of leukocytes, especially pseudoeosinophilic granulocytes and monocytes, while the number of neutrophils and lymphocytes was reduced. The analysis of the leukocyte number and differential blood count in the control group showed high individual variation of segmented granulocytes, monocytes and pseudoeosinophilic granulocytes. Statistically significant differences (p=0.00) were found for the white blood cells, nonsegmented neutrophils and pseudoeosinophils between the control and experimental group. The experimental group of males had an increased number of white blood cells, monocytes and pseudoeosinophils, where significant differences were found for nonsegmented and total neutrophils and also for pseudoeosinophils (p=0.00), lymphocytes (p=0.01) and monocytes (p=0.03). Females had an increased total number of white blood cells, lymphocytes, monocytes and pseudoeosinophils, while significant differences (p=0.00) were obtained in the number of white blood cells, nonsegmented and total neutrophils and pseudoeosinophils between the control and experimental group. Adaptation mechanisms in carp after water temperature heating are mostly reflected in the increase of pseudoeosinophils and the decrease of neutrophils.
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Affiliation(s)
- Damir Suljević
- Department of Biology, Faculty of Science , University of Sarajevo , Zmaja od Bosne 33-35, 71 000 Sarajevo , Bosnia and Herzegovina
| | - Adelaida Martinović-Jukić
- Department of Biology, Faculty of Science , University of Sarajevo , Zmaja od Bosne 33-35, 71 000 Sarajevo , Bosnia and Herzegovina
| | - Muhamed Fočak
- Department of Biology, Faculty of Science , University of Sarajevo , Zmaja od Bosne 33-35, 71 000 Sarajevo , Bosnia and Herzegovina
| | - Andi Alijagić
- Department of Biology, Faculty of Science , University of Sarajevo , Zmaja od Bosne 33-35, 71 000 Sarajevo , Bosnia and Herzegovina
| | - Dunja Rukavina
- Department of Morphology, Faculty of Veterinary Medicine , University of Sarajevo , Zmaja od Bosne 90, 71 000 Sarajevo , Bosnia and Herzegovina
| | - Amir Zahirović
- Department of Internal Diseases, Faculty of Veterinary Medicine , University of Sarajevo Zmaja od Bosne 90, 71 000 Sarajevo , Bosnia and Herzegovina
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28
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Lu Z, Huang FY, Cao R, Zhang L, Tan GH, He N, Huang J, Wang G, Zhang Z. Long Blood Residence and Large Tumor Uptake of Ruthenium Sulfide Nanoclusters for Highly Efficient Cancer Photothermal Therapy. Sci Rep 2017; 7:41571. [PMID: 28139763 PMCID: PMC5282482 DOI: 10.1038/srep41571] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2016] [Accepted: 12/21/2016] [Indexed: 12/15/2022] Open
Abstract
Transition metal sulfide (TMS) holds great potential in cancer photothermal therapy (PTT) because of the high absorbance in the near-infrared (NIR) region. The short blood circulation time and limited tumor accumulation of TMS-based photothermal agents, however, limit their applications. Herein, we design a novel TMS-based PTT agent, ruthenium sulfide-based nanoclusters (NCs), to overcome the current limitations. We firstly develop a simple method to prepare oleic acid coated ruthenium sulfide nanodots (OA-RuS1.7 NDs) and assemble them into water-soluble NCs via sequentially coating with denatured bovine serum albumin (dBSA) and poly(ethylene glycol) (PEG). The obtained PEG-dBSA-RuS1.7 NCs possess excellent photothermal conversion ability. More significantly, they exhibit enhanced blood circulation time and tumor-targeting efficiency in vivo compared with other TMS-based PTT nanoagents, which may be attributed to their appropriate hydrodynamic diameter (~70 nm) and an ideal charge (~0 mV). These characteristics help the PEG-dBSA-RuS1.7 NCs to escape the removal by the reticuloendothelial system (RES) and kidney. All these advantages enable the PEG-dBSA-RuS1.7 NCs to selectively concentrate in tumor sites and effectively ablate the cancer cells upon NIR irradiation.
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Affiliation(s)
- Zhuoxuan Lu
- Key Laboratory of Tropical Diseases and Translational Medicine of the Ministry of Education, Hainan Medical College, Haikou 571101, China
| | - Feng-ying Huang
- Key Laboratory of Tropical Diseases and Translational Medicine of the Ministry of Education, Hainan Medical College, Haikou 571101, China
| | - Rong Cao
- Department of Chemical Engineering, Monash University, Wellington Rd., Clayton, Vic 3800, Australia
| | - Liming Zhang
- Key Laboratory of Tropical Diseases and Translational Medicine of the Ministry of Education, Hainan Medical College, Haikou 571101, China
| | - Guang-hong Tan
- Key Laboratory of Tropical Diseases and Translational Medicine of the Ministry of Education, Hainan Medical College, Haikou 571101, China
| | - Nongyue He
- Hunan Key Laboratory of Green Chemistry and Application of Biological Nanotechnology, Hunan University of Technology, Zhuzhou 412008, China
| | - Jie Huang
- Key Laboratory of Nano-Bio Interface, Division of Nanobiomedicine, Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences, Suzhou 215123, China
| | - Guizhen Wang
- College of Materials and Chemical Engineering, Hainan University, Haikou 570228, China
| | - Zhijun Zhang
- Key Laboratory of Nano-Bio Interface, Division of Nanobiomedicine, Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences, Suzhou 215123, China
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Ostrowski N, Roy A, Kumta PN. Magnesium Phosphate Cement Systems for Hard Tissue Applications: A Review. ACS Biomater Sci Eng 2016; 2:1067-1083. [PMID: 33445235 DOI: 10.1021/acsbiomaterials.6b00056] [Citation(s) in RCA: 104] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
In the search for more ideal bone graft materials for clinical application, the investigation into ceramic bone cements or bone void filler is ongoing. Calcium phosphate-based materials have been widely explored and implemented for medical use in bone defect repair. Such materials are an excellent choice because the implant mimics the natural chemistry of mineralized bone matrix and in injectable cement form, can be implemented with relative ease. However, of the available calcium phosphate cements, none fully meet the ideal standard, displaying low strengths and acidic setting reactions or slow setting times, and are often very slow to resorb in vivo. The study of magnesium phosphates for bone cements is a relatively new field compared to traditional calcium phosphate bone cements. Although reports are more limited, preliminary studies have shown that magnesium phosphate cements (MPC) may be a strong alternative to calcium phosphates for certain applications. The goal of the present publication is to review the history and achievements of magnesium phosphate-based cements or bone void fillers to date, assess how these cements compare with calcium phosphate competitors and to analyze the future directions and outlook for the research, development, and clinical implementation of these cements.
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Affiliation(s)
- Nicole Ostrowski
- Swanson School of Engineering, University of Pittsburgh, 815C Benedum Hall, 3700 O'Hara Street, Pittsburgh, Pennsylvania 15261, United States
| | - Abhijit Roy
- Swanson School of Engineering, University of Pittsburgh, 815C Benedum Hall, 3700 O'Hara Street, Pittsburgh, Pennsylvania 15261, United States
| | - Prashant N Kumta
- Swanson School of Engineering, University of Pittsburgh, 815C Benedum Hall, 3700 O'Hara Street, Pittsburgh, Pennsylvania 15261, United States
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Zeng X, Han I, Abd-El-Barr M, Aljuboori Z, Anderson JE, Chi JH, Zafonte RD, Teng YD. The Effects of Thermal Preconditioning on Oncogenic and Intraspinal Cord Growth Features of Human Glioma Cells. Cell Transplant 2016; 25:2099-2109. [PMID: 27151267 DOI: 10.3727/096368916x691493] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
The adult rodent spinal cord presents an inhibitory environment for donor cell survival, impeding efficiency for xenograft-based modeling of gliomas. We postulated that mild thermal preconditioning may influence the fate of the implanted tumor cells. To test this hypothesis, high-grade human astrocytoma G55 and U87 cells were cultured under 37C and 38.5C to mimic regular experimental or core body temperatures of rodents, respectively. In vitro, the 38.5C-conditioned cells, relative to 37C, grew slightly faster. Compared to U87 cells, G55 cells demonstrated a greater response to the temperature difference. Hyperthermal culture markedly increased production of Hsp27 in most G55 cells, but only promoted transient expression of cancer stem cell marker CD133 in a small cell subpopulation. We subsequently transplanted G55 cells following 37C or 38.5C culture into the C2 or T10 spinal cord of adult female immunodeficient rats (3 rats/each locus/per temperature; total: 12 rats). Systematic analyses revealed that 38.5C-preconditioned G55 cells grew more malignantly at either C2 or T10 as determined by tumor size, outgrowth profile, resistance to bolus intratumor administration of 5-fluorouracil (0.1 mol), and posttumor survival (p0.05; n=6/group). Therefore, thermal preconditioning of glioma cells may be an effective way to influence the in vitro and in vivo oncological contour of glioma cells. Future studies are needed for assessing the potential oncogenic modifying effect of hyperthermia regimens on glioma cells.
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Lee ECH, Muñoz CX, McDermott BP, Beasley KN, Yamamoto LM, Hom LL, Casa DJ, Armstrong LE, Kraemer WJ, Anderson JM, Maresh CM. Extracellular and cellular Hsp72 differ as biomarkers in acute exercise/environmental stress and recovery. Scand J Med Sci Sports 2015; 27:66-74. [DOI: 10.1111/sms.12621] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/18/2015] [Indexed: 11/30/2022]
Affiliation(s)
- E. C-H. Lee
- Human Performance Laboratory; Department of Kinesiology; University of Connecticut; Storrs CT USA
| | - C. X. Muñoz
- Human Performance Laboratory; Department of Kinesiology; University of Connecticut; Storrs CT USA
| | - B. P. McDermott
- Department of Health, Human Performance and Recreation; University of Arkansas; Fayettville AR USA
| | - K. N. Beasley
- Human Performance Laboratory; Department of Kinesiology; University of Connecticut; Storrs CT USA
| | - L. M. Yamamoto
- Human Performance Laboratory; Department of Kinesiology; University of Connecticut; Storrs CT USA
| | - L. L. Hom
- Human Performance Laboratory; Department of Kinesiology; University of Connecticut; Storrs CT USA
| | - D. J. Casa
- Human Performance Laboratory; Department of Kinesiology; University of Connecticut; Storrs CT USA
| | - L. E. Armstrong
- Human Performance Laboratory; Department of Kinesiology; University of Connecticut; Storrs CT USA
| | - W. J. Kraemer
- Department of Human Sciences; Ohio State University; Columbus OH USA
| | - J. M. Anderson
- Human Performance Laboratory; Department of Kinesiology; University of Connecticut; Storrs CT USA
| | - C. M. Maresh
- Department of Human Sciences; Ohio State University; Columbus OH USA
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Haghniaz R, Umrani RD, Paknikar KM. Temperature-dependent and time-dependent effects of hyperthermia mediated by dextran-coated La0.7Sr0.3MnO3: in vitro studies. Int J Nanomedicine 2015; 10:1609-23. [PMID: 25759583 PMCID: PMC4346362 DOI: 10.2147/ijn.s78167] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Background The purpose of this study was to investigate the therapeutic efficacy of dextran-coated (Dex) La0.7Sr0.3MnO3 (LSMO) nanoparticles-mediated hyperthermia at different temperatures (43°C, 45°C, and 47°C) based on cell killing potential and induction of heat shock proteins in a murine melanoma cell (B16F1) line. Methods LSMO nanoparticles were synthesized by a citrate-gel method and coated with dextran. B16F1 cells were exposed to the Dex-LSMO nanoparticles and heated using a radiofrequency generator. After heating, the morphology and topology of the cells were investigated by optical microscopy and atomic force microscopy. At 0 hours and 24 hours post heating, cells were harvested and viability was analyzed by the Trypan blue dye exclusion method. Apoptosis and DNA fragmentation were assessed by terminal deoxynucleotidyl transferase-dUTP nick end labeling (TUNEL) assay and agarose gel electrophoresis, respectively. An enzyme-linked immunosorbent assay was used to quantify heat shock protein levels. Results Our data indicate that cell death and induction of heat shock proteins in melanoma cells increased in a time-dependent and temperature-dependent manner, particularly at temperatures higher than 43°C. The mode of cell death was found to be apoptotic, as evident by DNA fragmentation and TUNEL signal. A minimum temperature of 45°C was required to irreversibly alter cell morphology, significantly reduce cell viability, and result in 98% apoptosis. Repeated cycles of hyperthermia could induce higher levels of heat shock proteins (more favorable for antitumor activity) when compared with a single cycle. Conclusion Our findings indicate a potential use for Dex-LSMO-mediated hyperthermia in the treatment of melanoma and other types of cancer.
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Affiliation(s)
- Reihaneh Haghniaz
- Centre for Nanobioscience, Agharkar Research Institute, Pune, Maharashtra, India
| | - Rinku D Umrani
- Centre for Nanobioscience, Agharkar Research Institute, Pune, Maharashtra, India
| | - Kishore M Paknikar
- Centre for Nanobioscience, Agharkar Research Institute, Pune, Maharashtra, India
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Arai S, Lee CLK, Chang YT, Sato H, Sou K. Thermosensitive nanoplatforms for photothermal release of cargo from liposomes under intracellular temperature monitoring. RSC Adv 2015. [DOI: 10.1039/c5ra19729e] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Cargo release from thermosensitive liposomes by a near infrared laser was investigated under intracellular temperature monitoring.
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Affiliation(s)
- Satoshi Arai
- Waseda Bioscience Research Institute in Singapore (WABIOS)
- Singapore 138667
- Singapore
- Organization for University Research Initiatives
- Waseda University
| | - Chi-Lik Ken Lee
- Centre for Biomedical and Life Sciences
- Department for Technology
- Innovation and Enterprise (TIE)
- Singapore Polytechnic
- Singapore 139651
| | - Young-Tae Chang
- Department of Chemistry and NUS Medchem Program of the Life Sciences Institute
- National University of Singapore
- Singapore 117543
- Singapore
| | - Hirotaka Sato
- School of Mechanical and Aerospace Engineering
- Nanyang Technological University
- Singapore 637460
- Singapore
| | - Keitaro Sou
- Waseda Bioscience Research Institute in Singapore (WABIOS)
- Singapore 138667
- Singapore
- Organization for University Research Initiatives
- Waseda University
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Song AS, Najjar AM, Diller KR. Thermally induced apoptosis, necrosis, and heat shock protein expression in 3D culture. J Biomech Eng 2014; 136:1852724. [PMID: 24658653 DOI: 10.1115/1.4027272] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2014] [Accepted: 03/24/2014] [Indexed: 12/14/2022]
Abstract
This study was conducted to compare the heat shock responses of cells grown in 2D and 3D culture environments as indicated by the level of heat shock protein 70 expression and the incidence of apoptosis and necrosis of prostate cancer cell lines in response to graded hyperthermia. PC3 cells were stably transduced with a dual reporter system composed of two tandem expression cassettes-a conditional heat shock protein promoter driving the expression of green fluorescent protein (HSPp-GFP) and a cytomegalovirus (CMV) promoter controlling the constitutive expression of a "beacon" red fluorescent protein (CMVp-RFP). Two-dimensional and three-dimensional cultures of PC3 prostate cancer cells were grown in 96-well plates for evaluation of their time-dependent response to supraphysiological temperature. To induce controlled hyperthermia, culture plates were placed on a flat copper surface of a circulating water manifold that maintained the specimens within ±0.1°C of a target temperature. Hyperthermia protocols included various combinations of temperature, ranging from 37°C to 57°C, and exposure times of up to 2 h. The majority of protocols were focused on temperature and time permutations, where the response gradient was greatest. Post-treatment analysis by flow cytometry analysis was used to measure the incidences of apoptosis (annexin V-FITC stain), necrosis (propidium iodide (PI) stain), and HSP70 transcription (GFP expression). Cells grown in 3D compared with 2D culture showed reduced incidence of apoptosis and necrosis and a higher level of HSP70 expression in response to heat shock at the temperatures tested. Cells responded differently to hyperthermia when grown in 2D and 3D cultures. Three-dimensional culture appears to enhance survival plausibly by activating protective processes related to enhanced-HSP70 expression. These differences highlight the importance of selecting physiologically relevant 3D models in assessing cellular responses to hyperthermia in experimental settings.
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Rikhvanov EG, Fedoseeva IV, Varakina NN, Rusaleva TM, Fedyaeva AV. Mechanism of Saccharomyces cerevisiae yeast cell death induced by heat shock. Effect of cycloheximide on thermotolerance. BIOCHEMISTRY (MOSCOW) 2014; 79:16-24. [PMID: 24512659 DOI: 10.1134/s0006297914010039] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The mechanism of yeast cell death induced by heat shock was found to be dependent on the intensity of heat exposure. Moderate (45°C) heat shock strongly increased the generation of reactive oxygen species (ROS) and cell death. Pretreatment with cycloheximide (at 30°C) suppressed cell death, but produced no effect on ROS production. The protective effect was absent if cycloheximide was added immediately before heat exposure and the cells were incubated with the drug during the heat treatment and recovery period. The rate of ROS production and protective effect of cycloheximide on viability were significantly decreased in the case of severe (50°C) heat shock. Treatment with cycloheximide at 39°C inhibited the induction of Hsp104 synthesis and suppressed the development of induced thermotolerance to severe shock (50°C), but it had no effect on induced thermotolerance to moderate (45°C) heat shock. At the same time, Hsp104 effectively protected cells from death independently of the intensity of heat exposure. These data indicate that moderate heat shock induced programmed cell death in the yeast cells, and cycloheximide suppressed this process by inhibiting general synthesis of proteins.
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Affiliation(s)
- E G Rikhvanov
- Siberian Institute of Plant Physiology and Biochemistry, Siberian Division of the Russian Academy of Sciences, Irkutsk, 664033, Russia.
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Kennedy D, Mnich K, Samali A. Heat shock preconditioning protects against ER stress-induced apoptosis through the regulation of the BH3-only protein BIM. FEBS Open Bio 2014; 4:813-21. [PMID: 25349785 PMCID: PMC4208087 DOI: 10.1016/j.fob.2014.09.004] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2014] [Revised: 08/11/2014] [Accepted: 09/10/2014] [Indexed: 12/19/2022] Open
Abstract
Heat shock (HS) preconditioning protects against ER stress-induced apoptosis upstream of BAX activation. HS preconditioning elevates the expression of HSPA1, a key pro-survival marker. The primary mechanism by which HS preconditioning renders cells resistant to ER stress is via downregulation of BIM. HSPA1 does not play a role in the regulation of BIM protein levels.
A mild heat shock (HS) preconditioning and acquisition of thermotolerance protects cells against a variety of cytotoxic agents that otherwise induce apoptosis. Here we tested whether there is a molecular link between HS preconditioning and endoplasmic reticulum (ER) stress-induced apoptosis. ER stress results from a loss of ER lumen homeostasis, culminating in an accumulation of unfolded/misfolded proteins in the ER and activation of unfolded protein response (UPR). Unresolved, ER stress leads to activation of BH3-only proteins, mitochondrial membrane permeabilization, caspase activation and apoptotic cell death. HS preconditioning (1 h at 42 °C) induced a rapid increase in HSPA1 (HSP70) levels which remained elevated for at least 48 h post-HS. HS preconditioning significantly reduced BAX, caspase activation and apoptosis in cell cultures treated with the ER stress-inducing agents thapsigargin (TG) and tunicamycin (TM). HS-mediated protection was found to be due to regulation of the BH3-only protein BIM. Further, overexpression of HSPA1 could not mimic the effect of HS on BIM expression, suggesting that other HS factors may play a role in inhibiting ER stress-induced apoptosis by regulating BIM.
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Wex C, Stoll A, Fröhlich M, Arndt S, Lippert H. Mechanics of fresh, frozen-thawed and heated porcine liver tissue. Int J Hyperthermia 2014; 30:271-83. [DOI: 10.3109/02656736.2014.924161] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
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38
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Alekseenko LL, Zemelko VI, Domnina AP, Lyublinskaya OG, Zenin VV, Pugovkina NA, Kozhukharova IV, Borodkina AV, Grinchuk TM, Fridlyanskaya II, Nikolsky NN. Sublethal heat shock induces premature senescence rather than apoptosis in human mesenchymal stem cells. Cell Stress Chaperones 2014; 19:355-66. [PMID: 24078383 PMCID: PMC3982025 DOI: 10.1007/s12192-013-0463-6] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2013] [Revised: 09/11/2013] [Accepted: 09/12/2013] [Indexed: 12/12/2022] Open
Abstract
Stem cells in adult organism are responsible for cell turnover and tissue regeneration. The study of stem cell stress response contributes to our knowledge on the mechanisms of damaged tissue repair. Previously, we demonstrated that sublethal heat shock (HS) induced apoptosis in human embryonic stem cells. This study aimed to investigate HS response of human adult stem cells. Human mesenchymal stem cells (MSCs) cultivated in vitro were challenged with sublethal HS. It was found that sublethal HS did not affect the cell viability assessed by annexin V/propidium staining. However, MSCs subjected to severe HS exhibited features of stress-induced premature senescence (SIPS): irreversible cell cycle arrest, altered morphology, increased expression of senescence-associated β-galactosidase (SA-β-gal) activity, and induction of cyclin-dependent kinase inhibitor p21 protein. High level of Hsp70 accumulation induced by sublethal HS did not return to the basal level, at least, after 72 h of the cell recovery when most cells exhibited SIPS hallmarks. MSCs survived sublethal HS, and resumed proliferation sustained the properties of parental MSCs: diploid karyotype, replicative senescence, expression of the cell surface markers, and capacity for multilineage differentiation. Our results showed for the first time that in human MSCs, sublethal HS induced premature senescence rather than apoptosis or necrosis. MSC progeny that survived sublethal HS manifested stem cell properties of the parental cells: limited replicative life span and multilineage capacity.
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Affiliation(s)
| | | | - Alisa P. Domnina
- Institute of Cytology, Russian Academy of Sciences, St. Petersburg, Russia
| | | | - Valery V. Zenin
- Institute of Cytology, Russian Academy of Sciences, St. Petersburg, Russia
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Kandasamy S, Khan W, Evans FD, Critchley AT, Zhang J, Fitton JH, Stringer DN, Gardiner VA, Prithiviraj B. A fucose containing polymer-rich fraction from the brown alga Ascophyllum nodosum mediates lifespan increase and thermal-tolerance in Caenorhabditis elegans, by differential effects on gene and protein expression. Food Funct 2014; 5:275-84. [PMID: 24323434 DOI: 10.1039/c3fo60050e] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2023]
Abstract
The extracts of the brown alga, Ascophyllum nodosum, which contains several bioactive compounds, have been shown to impart biotic and abiotic stress tolerance properties when consumed by animals. However, the physiological, biochemical and molecular mechanism underlying such effects remain elusive. We investigated the effect of A. nodosum fucose-containing polymer (FCP) on tolerance to thermally induced stress using the invertebrate animal model, Caenorhabditis elegans. FCP at a concentration of 150 μg mL(-1) significantly improved the life span and tolerance against thermally induced stress in C. elegans. The treatment increased the C. elegans survival by approximately 24%, when the animals were under severe thermally induced stress (i.e. 35 °C) and 27% under mild stress (i.e. 30 °C) conditions. The FCP induced differential expression of genes and proteins is associated with stress response pathways. Under thermal stress, FCP treatment significantly altered the expression of 65 proteins (54 up-regulated & 11 down-regulated). Putative functional analysis of FCP-induced differential proteins signified an association of altered proteins in stress-related molecular and biochemical pathways of the model worm.
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Affiliation(s)
- Saveetha Kandasamy
- Department of Environmental Sciences, Faculty of Agriculture, Dalhousie University, P.O. Box 550, Truro, NS B2B 5E3, Canada.
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Shahmirzadi D, Hou GY, Chen J, Konofagou EE. Ex Vivo characterization of canine liver tissue viscoelasticity after high-intensity focused ultrasound ablation. ULTRASOUND IN MEDICINE & BIOLOGY 2014; 40:341-50. [PMID: 24315395 PMCID: PMC4005882 DOI: 10.1016/j.ultrasmedbio.2013.09.016] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2013] [Revised: 08/24/2013] [Accepted: 09/12/2013] [Indexed: 05/12/2023]
Abstract
The potential of elasticity imaging to detect high-intensity focused ultrasound (HIFU) lesions on the basis of their distinct biomechanical properties is promising. However, information on the quantitative mechanical properties of the tissue and the optimal intensity at which to determine the best contrast parameters is scarce. In this study, fresh canine livers were ablated using combinations of ISPTA intensities of 5.55, 7.16 and 9.07 kW/cm(2) and durations of 10 and 30 s ex vivo, resulting in six groups of ablated tissues. Biopsy samples were then interrogated using dynamic shear mechanical testing within the range of 0.1-10 Hz to characterize the tissue's post-ablation viscoelastic properties. All mechanical parameters were found to be frequency dependent. Compared with unablated cases, all six groups of ablated tissues had statistically significant higher complex shear modulus and shear viscosity. However, among the ablated groups, both complex shear modulus and shear viscosity were found to monotonically increase in groups 1-4 (5.55 kW/cm(2) for 10 s, 7.16 kW/cm(2) for 10 s, 9.07 kW/cm(2) for 10 s, and 5.55 kW/cm(2) for 30 s, respectively), but to decrease in groups 5 and 6 (7.16 kW/cm(2) for 30 s, and 9.07 kW/cm(2) for 30 s, respectively). For groups 5 and 6, the temperature was expected to exceed the boiling point, and therefore, the decreased stiffening could be due to the compromised integrity of the tissue microstructure. Future studies will entail estimation tissue mechanical properties in vivo and perform real-time monitoring of tissue alterations during ablation.
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Affiliation(s)
- Danial Shahmirzadi
- Ultrasound and Elasticity Imaging Laboratory, Department of Biomedical Engineering, Columbia University, New York, New York, USA
| | - Gary Y Hou
- Ultrasound and Elasticity Imaging Laboratory, Department of Biomedical Engineering, Columbia University, New York, New York, USA
| | - Jiangang Chen
- Ultrasound and Elasticity Imaging Laboratory, Department of Biomedical Engineering, Columbia University, New York, New York, USA
| | - Elisa E Konofagou
- Ultrasound and Elasticity Imaging Laboratory, Department of Biomedical Engineering, Columbia University, New York, New York, USA; Department of Radiology, Columbia University, New York, New York, USA.
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Deane EE, van de Merwe JP, Hui JHL, Wu RSS, Woo NYS. PBDE-47 exposure causes gender specific effects on apoptosis and heat shock protein expression in marine medaka, Oryzias melastigma. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2014; 147:57-67. [PMID: 24374848 DOI: 10.1016/j.aquatox.2013.12.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2013] [Revised: 12/04/2013] [Accepted: 12/07/2013] [Indexed: 06/03/2023]
Abstract
Marine medaka (Oryzias melastigma) was fed with a low and high dose of dietary 2,2',4,4'-tetra-bromodiphenyl ether (PBDE-47), over 21 days. Gender specific changes in caspases 3 and 8 in medaka were found as activities in male medaka were significantly increased in both liver and muscle at both low and high exposure levels whereas caspase activity in female medaka tissue remained unchanged. Results of HSP90 and HSP70 immunoassays also showed gender specific related changes as both HSP families were unchanged in liver and muscle of male medaka but significantly increased in liver and muscle of female medaka, following PBDE-47 exposure. The gender specific effects of PBDE-47 on HSP expression profiles could not be explained by inherent differences in the heat shock response of male and female marine medaka, as the HSP profiles in liver and muscle, induced by acute heat shock, were similar in both sexes. The findings from this study provide evidence that PBDE-47 can cause gender specific modulatory effects on mechanisms critical to the apoptotic cascade as well as HSP regulation and expression.
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Affiliation(s)
- Eddie E Deane
- School of Life Sciences, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong.
| | - Jason P van de Merwe
- State Key Laboratory in Marine Pollution, Department of Biology and Chemistry, City University of Hong Kong, Kowloon, Hong Kong
| | - Jerome H L Hui
- School of Life Sciences, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong
| | - Rudolf S S Wu
- School of Biological Sciences, The University of Hong Kong, Pokfulam, Hong Kong
| | - Norman Y S Woo
- School of Life Sciences, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong
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Haglund C, Mohanty C, Fryknäs M, D'Arcy P, Larsson R, Linder S, Rickardson L. Identification of an inhibitor of the ubiquitin–proteasome system that induces accumulation of polyubiquitinated proteins in the absence of blocking of proteasome function. MEDCHEMCOMM 2014. [DOI: 10.1039/c3md00386h] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The ubiquitin–proteasome system (UPS) represents one of the most promising therapeutic targets in oncology to emerge in recent years.
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Affiliation(s)
- Caroline Haglund
- Department of Medical Sciences (Division of Clinical Pharmacology)
- Uppsala University
- SE-751 85 Uppsala
- Sweden
| | - Chitralekha Mohanty
- Department of Oncology-Pathology
- Karolinska Institutet
- SE-171 76 Stockholm
- Sweden
| | - Mårten Fryknäs
- Department of Medical Sciences (Division of Clinical Pharmacology)
- Uppsala University
- SE-751 85 Uppsala
- Sweden
| | - Padraig D'Arcy
- Department of Oncology-Pathology
- Karolinska Institutet
- SE-171 76 Stockholm
- Sweden
| | - Rolf Larsson
- Department of Medical Sciences (Division of Clinical Pharmacology)
- Uppsala University
- SE-751 85 Uppsala
- Sweden
| | - Stig Linder
- Department of Medical Sciences (Division of Clinical Pharmacology)
- Uppsala University
- SE-751 85 Uppsala
- Sweden
- Department of Oncology-Pathology
| | - Linda Rickardson
- Department of Medical Sciences (Division of Clinical Pharmacology)
- Uppsala University
- SE-751 85 Uppsala
- Sweden
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Tang Y, McGoron AJ. Increasing the rate of heating: A potential therapeutic approach for achieving synergistic tumour killing in combined hyperthermia and chemotherapy. Int J Hyperthermia 2013; 29:145-55. [DOI: 10.3109/02656736.2012.760757] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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44
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Fernandez Cabada T, Sanchez Lopez de Pablo C, Martinez Serrano A, del Pozo Guerrero F, Serrano Olmedo JJ, Ramos Gomez M. Induction of cell death in a glioblastoma line by hyperthermic therapy based on gold nanorods. Int J Nanomedicine 2012; 7:1511-23. [PMID: 22619509 PMCID: PMC3356189 DOI: 10.2147/ijn.s28470] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
BACKGROUND Metallic nanorods are promising agents for a wide range of biomedical applications. In this study, we developed an optical hyperthermia method capable of inducing in vitro death of glioblastoma cells. METHODS The procedure used was based on irradiation of gold nanorods with a continuous wave laser. This kind of nanoparticle converts absorbed light into localized heat within a short period of time due to the surface plasmon resonance effect. The effectiveness of the method was determined by measuring changes in cell viability after laser irradiation of glioblastoma cells in the presence of gold nanorods. RESULTS Laser irradiation in the presence of gold nanorods induced a significant decrease in cell viability, while no decrease in cell viability was observed with laser irradiation or incubation with gold nanorods alone. The mechanism of cell death mediated by gold nanorods during photothermal ablation was analyzed, indicating that treatment compromised the integrity of the cell membrane instead of initiating the process of programmed cell death. CONCLUSION The use of gold nanorods in hyperthermal therapies is very effective in eliminating glioblastoma cells, and therefore represents an important area of research for therapeutic development.
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Brinton MR, Tagge CA, Stewart RJ, Cheung AK, Shiu YTE, Christensen DA. Thermal sensitivity of endothelial cells on synthetic vascular graft material. Int J Hyperthermia 2012; 28:163-74. [DOI: 10.3109/02656736.2011.638963] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
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Hom LL, Lee ECH, Apicella JM, Wallace SD, Emmanuel H, Klau JF, Poh PYS, Marzano S, Armstrong LE, Casa DJ, Maresh CM. Eleven days of moderate exercise and heat exposure induces acclimation without significant HSP70 and apoptosis responses of lymphocytes in college-aged males. Cell Stress Chaperones 2012; 17:29-39. [PMID: 21796498 PMCID: PMC3227846 DOI: 10.1007/s12192-011-0283-5] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2011] [Revised: 07/09/2011] [Accepted: 07/13/2011] [Indexed: 01/29/2023] Open
Abstract
The purpose of this study was to assess whether a lymphocyte heat shock response and altered heat tolerance to ex vivo heat shock is evident during acclimation. We aimed to use flow cytometry to assess the CD3(+)CD4(+) T lymphocyte cell subset. We further aimed to induce acclimation using moderately stressful daily exercise-heat exposures to achieve acclimation. Eleven healthy males underwent 11 days of heat acclimation. Subjects walked for 90 min (50 ± 8% VO(2max)) on a treadmill (3.5 mph, 5% grade), in an environmental chamber (33°C, 30-50% relative humidity). Rectal temperature (°C), heart rate (in beats per minute), rating of perceived exertion , thermal ratings, hydration state, and sweat rate were measured during exercise and recovery. On days 1, 4, 7, 10, and 11, peripheral blood mononuclear cells were isolated from pre- and post-exercise blood samples. Intracellular and surface HSP70 (SPA-820PE, Stressgen, Assay Designs), and annexin V (ab14085, Abcam Inc.), as a marker of early apoptosis, were measured on CD3(+) and CD4(+) (sc-70624, sc-70670, Santa Cruz Biotechnology) gated lymphocytes. On day 10, subjects experienced 28 h of sleep loss. Heat acclimation was verified with decreased post-exercise rectal temperature, heart rate, and increased sweat rate on day 11, versus day 1. Heat acclimation was achieved in the absence of significant changes in intracellular HSP70 mean fluorescence intensity and percent of HSP70(+) lymphocytes during acclimation. Furthermore, there was no increased cellular heat tolerance during secondary ex vivo heat shock of the lymphocytes acquired from subjects during acclimation. There was no effect of a mild sleep loss on any variable. We conclude that our protocol successfully induced physiological acclimation without induction of cellular heat shock responses in lymphocytes and that added mild sleep loss is not sufficient to induce a heat shock response.
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Affiliation(s)
- Lindsay L. Hom
- Human Performance Laboratory, Department of Kinesiology, University of Connecticut, Storrs, CT 06269 USA
| | - Elaine Choung-Hee Lee
- Mount Desert Island Biological Laboratory, Salisbury Cove, ME 04634 USA
- PO Box 35, Old Bar Harbor Road, Salisbury Cove, ME 04672 USA
| | - Jenna M. Apicella
- Human Performance Laboratory, Department of Kinesiology, University of Connecticut, Storrs, CT 06269 USA
| | - Sean D. Wallace
- Human Performance Laboratory, Department of Kinesiology, University of Connecticut, Storrs, CT 06269 USA
| | - Holly Emmanuel
- Human Performance Laboratory, Department of Kinesiology, University of Connecticut, Storrs, CT 06269 USA
| | - Jennifer F. Klau
- Human Performance Laboratory, Department of Kinesiology, University of Connecticut, Storrs, CT 06269 USA
| | - Paula Y. S. Poh
- Human Performance Laboratory, Department of Kinesiology, University of Connecticut, Storrs, CT 06269 USA
| | - Stefania Marzano
- Human Performance Laboratory, Department of Kinesiology, University of Connecticut, Storrs, CT 06269 USA
| | - Lawrence E. Armstrong
- Human Performance Laboratory, Department of Kinesiology, University of Connecticut, Storrs, CT 06269 USA
| | - Douglas J. Casa
- Human Performance Laboratory, Department of Kinesiology, University of Connecticut, Storrs, CT 06269 USA
| | - Carl M. Maresh
- Human Performance Laboratory, Department of Kinesiology, University of Connecticut, Storrs, CT 06269 USA
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Kandasamy S, Fan D, Sangha JS, Khan W, Evans F, Critchley AT, Prithiviraj B. Tasco(®), a product of Ascophyllum nodosum, imparts thermal stress tolerance in Caenorhabditis elegans. Mar Drugs 2011; 9:2256-2282. [PMID: 22163185 PMCID: PMC3229234 DOI: 10.3390/md9112256] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2011] [Revised: 10/09/2011] [Accepted: 10/24/2011] [Indexed: 02/04/2023] Open
Abstract
Tasco(®), a commercial product manufactured from the brown alga Ascophyllum nodosum, has been shown to impart thermal stress tolerance in animals. We investigated the physiological, biochemical and molecular bases of this induced thermal stress tolerance using the invertebrate animal model, Caenorhabiditis elegans. Tasco(®) water extract (TWE) at 300 μg/mL significantly enhanced thermal stress tolerance as well as extended the life span of C. elegans. The mean survival rate of the model animals under thermal stress (35 °C) treated with 300 μg/mL and 600 μg/mL TWE, respectively, was 68% and 71% higher than the control animals. However, the TWE treatments did not affect the nematode body length, fertility or the cellular localization of daf-16. On the contrary, TWE under thermal stress significantly increased the pharyngeal pumping rate in treated animals compared to the control. Treatment with TWE also showed differential protein expression profiles over control following 2D gel-electrophoresis analysis. Furthermore, TWE significantly altered the expression of at least 40 proteins under thermal stress; among these proteins 34 were up-regulated while six were down-regulated. Mass spectroscopy analysis of the proteins altered by TWE treatment revealed that these proteins were related to heat stress tolerance, energy metabolism and a muscle structure related protein. Among them heat shock proteins, superoxide dismutase, glutathione peroxidase, aldehyde dehydrogenase, saposin-like proteins 20, myosin regulatory light chain 1, cytochrome c oxidase RAS-like, GTP-binding protein RHO A, OS were significantly up-regulated, while eukaryotic translation initiation factor 5A-1 OS, 60S ribosomal protein L18 OS, peroxiredoxin protein 2 were down regulated by TWE treatment. These results were further validated by gene expression and reporter gene expression analyses. Overall results indicate that the water soluble components of Tasco(®) imparted thermal stress tolerance in the C. elegans by altering stress related biochemical pathways.
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Affiliation(s)
- Saveetha Kandasamy
- Department of Environmental Sciences, Nova Scotia Agricultural College, P.O. Box 550, Truro NS B2B 5E3, Canada; E-Mails: (S.K.); (D.F.); (J.S.S.)
| | - Di Fan
- Department of Environmental Sciences, Nova Scotia Agricultural College, P.O. Box 550, Truro NS B2B 5E3, Canada; E-Mails: (S.K.); (D.F.); (J.S.S.)
| | - Jatinder Singh Sangha
- Department of Environmental Sciences, Nova Scotia Agricultural College, P.O. Box 550, Truro NS B2B 5E3, Canada; E-Mails: (S.K.); (D.F.); (J.S.S.)
- Acadian Seaplants Limited, 30 Brown Avenue, Dartmouth NS B3B 1X8, Canada; E-Mails: (F.E.); (A.T.C.)
| | - Wajahatullah Khan
- Genome Research Chair Unit, Department of Biochemistry, College of Science, King Saud University, PO Box 2455, Riyadh 11451, Saudi Arabia; E-Mail:
| | - Franklin Evans
- Acadian Seaplants Limited, 30 Brown Avenue, Dartmouth NS B3B 1X8, Canada; E-Mails: (F.E.); (A.T.C.)
| | - Alan T. Critchley
- Acadian Seaplants Limited, 30 Brown Avenue, Dartmouth NS B3B 1X8, Canada; E-Mails: (F.E.); (A.T.C.)
| | - Balakrishnan Prithiviraj
- Department of Environmental Sciences, Nova Scotia Agricultural College, P.O. Box 550, Truro NS B2B 5E3, Canada; E-Mails: (S.K.); (D.F.); (J.S.S.)
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Brinton MR, Stewart RJ, Cheung AK, Christensen DA, Shiu YTE. Modelling ultrasound-induced mild hyperthermia of hyperplasia in vascular grafts. Theor Biol Med Model 2011; 8:42. [PMID: 22054016 PMCID: PMC3217891 DOI: 10.1186/1742-4682-8-42] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2011] [Accepted: 11/03/2011] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND Expanded polytetrafluoroethylene (ePTFE) vascular grafts frequently develop occlusive neointimal hyperplasia as a result of myofibroblast over-growth, leading to graft failure. ePTFE exhibits higher ultrasound attenuation than native soft tissues. We modelled the selective absorption of ultrasound by ePTFE, and explored the feasibility of preventing hyperplasia in ePTFE grafts by ultrasound heating. Specifically, we simulated the temperature profiles of implanted grafts and nearby soft tissues and blood under ultrasound exposure. The goal was to determine whether ultrasound exposure of an ePTFE graft can generate temperatures sufficient to prevent cell growth on the graft without damaging nearby soft tissues and blood. METHODS Ultrasound beams from two transducers (1.5 and 3.2 MHz) were simulated in two graft/tissue models, with and without an intra-graft cellular layer mimicking hyperplasia, using the finite-difference time-domain (FDTD) method. The resulting power deposition patterns were used as a heat source for the Pennes bioheat equation in a COMSOL(®) Multiphysics heat transfer model. 50°C is known to cause cell death and therefore the transducer powers were adjusted to produce a 13°C temperature rise from 37°C in the ePTFE. RESULTS Simulations showed that both the frequency of the transducers and the presence of hyperplasia significantly affect the power deposition patterns and subsequent temperature profiles on the grafts and nearby tissues. While neither transducer significantly raised the temperature of the blood, the 1.5-MHz transducer was less focused and heated larger volumes of the graft and nearby soft tissues than the 3.2-MHz transducer. The presence of hyperplasia had little effect on the blood's temperature, but further increased the temperature of the graft and nearby soft tissues in response to either transducer. Skin cooling and blood flow play a significant role in preventing overheating of the native tissues. CONCLUSIONS Modelling shows that ultrasound can selectively heat ePTFE grafts and produce temperatures that cause cell death on the graft. The temperature increase in blood is negligible and that in the adjacent soft tissues may be minimized by skin cooling and using appropriate transducers. Therefore, ultrasound heating may have the potential to reduce neointimal hyperplasia and failure of ePTFE vascular grafts.
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Affiliation(s)
- Mark R Brinton
- Department of Electrical and Computer Engineering, University of Utah, Salt Lake City, UT, USA
- Department of Electrical Engineering, Stanford University, 350 Serra Mall (Mail Code: 9505), Stanford, CA 94305-9505, USA
| | - Russell J Stewart
- Department of Bioengineering, University of Utah, Salt Lake City, UT, USA
| | - Alfred K Cheung
- Department of Medicine, Division of Nephrology & Hypertension, University of Utah, Salt Lake City, UT, USA
- Medical Service, Veterans Affairs Salt Lake City Healthcare System, UT, USA
| | - Douglas A Christensen
- Department of Electrical and Computer Engineering, University of Utah, Salt Lake City, UT, USA
- Department of Bioengineering, University of Utah, Salt Lake City, UT, USA
| | - Yan-Ting E Shiu
- Department of Bioengineering, University of Utah, Salt Lake City, UT, USA
- Department of Medicine, Division of Nephrology & Hypertension, University of Utah, Salt Lake City, UT, USA
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Ortega-Ortega Y, García-Latorre EA, Lezama RA, Luna-Herrera J, Vega-López A, Domínguez-López ML. Heat shock protein 60 from Klebsiella pneumoniae protects mononuclear cells from apoptotic cell death induced by dexamethasone. Microb Pathog 2011; 51:352-9. [DOI: 10.1016/j.micpath.2011.07.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2011] [Revised: 07/04/2011] [Accepted: 07/06/2011] [Indexed: 01/09/2023]
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Regression of peripapillary choroidal neovascularization after oscillatory transpupillary thermotherapy and anti-VEGF pharmacotherapy. Eur J Ophthalmol 2011; 21:162-72. [PMID: 20623469 DOI: 10.5301/ejo.2010.3272] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/23/2010] [Indexed: 11/20/2022]
Abstract
PURPOSE We prospectively evaluated a new treatment for recalcitrant choroidal neovascularization (CNV) in 4 patients. We used an infrared laser (810 nm) in oscillatory thermotherapy (OTT) mode combined with indocyanine green (ICG) dye, utilizing the beneficial effect of both thermotherapy and photodynamic therapy. We describe preliminary experiences with ICG-assisted OTT (I-OTT) combined with intravitreal bevacizumab/dexamethasone for refractory peripapillary CNV resistant to standard therapy. METHODS Clinical examination, funduscopy, fluorescein angiography, and optical coherence tomography were performed at baseline and postoperatively. Infrared laser spot size was approximately one-half the lesion size (oscillation 2-3 Hz). Intravitreal injections of bevacizumab (1.25 mg) and dexamethasone (1000 µg) were done during the same visit. RESULTS Mean follow-up was 12.5 months (range 5-17). Mean energy level was 325 mW (range 200-500) in oscillatory mode (2-3 Hz/sec) pre- and post-ICG infusion. Indocyanine green dose was approximately 1 mg/kg (75 mg/patient). All patients had a single treatment. Mean visual acuity improved in 1 patient from 20/60 to 20/30 and remained the same in the other 3 (20/20, 20/40, and 20/400). At final examination, there was no evidence of clinical or angiographic activity of CNV. CONCLUSIONS Indocyanine green-assisted OTT has the potential to treat CNV in wet age-related macular degeneration. It may reduce thermal side effects and eliminate or reduce the need for frequent intravitreal treatment. We postulate that I-OTT has a synergistic effect of thermal energy combined with a weak photosensitizer (ICG) applied in an individualized manner, which minimizes thermal damage to retinal and choroidal tissue. Additional anti-vascular endothelial growth factor pharmacotherapy enhances the effect of I-OTT on abnormal new vessels.
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