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Sen K, Sheppe AEF, Singh I, Hui WW, Edelmann MJ, Rinaldi C. Exosomes released by breast cancer cells under mild hyperthermic stress possess immunogenic potential and modulate polarization in vitro in macrophages. Int J Hyperthermia 2020; 37:696-710. [PMID: 32568583 PMCID: PMC8694666 DOI: 10.1080/02656736.2020.1778800] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Revised: 05/29/2020] [Accepted: 06/02/2020] [Indexed: 12/21/2022] Open
Abstract
Macrophages play a dual role in tumor initiation and progression, with both tumor-promoting and tumor-suppressive effects; hence, it is essential to understand the distinct responses of macrophages to tumor progression and therapy. Mild hyperthermia has gained importance as a therapeutic regimen against cancer due to its immunogenic nature, efficacy, and potential synergy with other therapies, yet the response of macrophages to molecular signals from hyperthermic cancer cells has not yet been clearly defined. Due to limited response rate of breast cancer to conventional therapeutics the development, and understanding of alternative therapies like hyperthermia is pertinent. In order to determine conditions corresponding to mild thermal dose, cytotoxicity of different hyperthermic temperatures and treatment durations were tested in normal murine macrophages and breast cancer cell lines. Examination of exosome release in hyperthermia-treated cancer cells revealed enhanced efflux and a larger size of exosomes released under hyperthermic stress. Exposure of naïve murine macrophages to exosomes released from 4T1 and EMT-6 cells posthyperthermia treatment, led to an increased expression of specific macrophage activation markers. Further, exosomes released by hyperthermia-treated cancer cells had increased content of heat shock protein 70 (Hsp70). Together, these results suggest a potential immunogenic role for exosomes released from cancer cells treated with mild hyperthermia.
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Affiliation(s)
- Kacoli Sen
- Department of Chemical Engineering, University of Florida, Gainesville, USA
| | - Austin E. F. Sheppe
- Department of Microbiology and Cell Science, University of Florida, Gainesville, USA
| | - Ishita Singh
- Department of Chemical Engineering, University of Florida, Gainesville, USA
| | - Winnie W. Hui
- Department of Microbiology and Cell Science, University of Florida, Gainesville, USA
| | - Mariola J. Edelmann
- Department of Microbiology and Cell Science, University of Florida, Gainesville, USA
| | - Carlos Rinaldi
- Department of Chemical Engineering, University of Florida, Gainesville, USA
- J. Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Gainesville, USA
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Moradi-Marjaneh R, Paseban M, Moradi Marjaneh M. Hsp70 inhibitors: Implications for the treatment of colorectal cancer. IUBMB Life 2019; 71:1834-1845. [PMID: 31441584 DOI: 10.1002/iub.2157] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2019] [Accepted: 07/12/2019] [Indexed: 12/22/2022]
Abstract
Colorectal cancer (CRC) is one of the most common malignancies in the world. Despite intensive advances in diagnosis and treatment of CRC, it is yet one of the leading cause of cancer related morbidity and mortality. Therefore, there is an urgent medical need for alternative therapeutic approaches to treat CRC. The 70 kDa heat shock proteins (Hsp70s) are a family of evolutionary conserved heat shock proteins, which play an important role in cell homeostasis and survival. They overexpress in various types of malignancy including CRC and are typically accompanied with poor prognosis. Hence, inhibition of Hsp70 may be considered as a striking chemotherapeutic avenue. This review summarizes the current knowledge on the progress made so far to discover compounds, which target the Hsp70 family, with particular emphasis on their efficacy in treatment of CRC. We also briefly explain the induction of Hsp70 as a strategy to prevent CRC.
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Affiliation(s)
| | - Maryam Paseban
- Department of Physiology, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Mahdi Moradi Marjaneh
- Cancer Division, QIMR Berghofer Medical Research Institute, Brisbane, Queensland, Australia
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Cesna V, Sukovas A, Jasukaitiene A, Naginiene R, Barauskas G, Dambrauskas Z, Paskauskas S, Gulbinas A. Narrow line between benefit and harm: Additivity of hyperthermia to cisplatin cytotoxicity in different gastrointestinal cancer cells. World J Gastroenterol 2018; 24:1072-1083. [PMID: 29563752 PMCID: PMC5850127 DOI: 10.3748/wjg.v24.i10.1072] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/02/2017] [Revised: 01/02/2018] [Accepted: 01/15/2018] [Indexed: 02/06/2023] Open
Abstract
AIM To investigate the response to hyperthermia and chemotherapy, analyzing apoptosis, cytotoxicity, and cisplatin concentration in different digestive system cancer cells.
METHODS AGS (gastric cancer cell line), Caco-2 (colon cancer cell line) and T3M4 (pancreatic cancer cell line) were treated by cisplatin and different temperature setting (37 °C to 45 °C) either in isolation, or in combination. Treatment lasted for one hour. 48 h after the treatment viability was evaluated by MTT, cell apoptosis by Annexin V-PE and 7ADD flow cytometry. Intracellular cisplatin concentration was measured immediately after the treatment, using mass spectrometry. Isobologram analysis was performed to evaluate the mathematical combined effect of temperature and cisplatin.
RESULTS AGS cells were the most sensitive to isolated application of hyperthermia. Hyperthermia, in addition to cisplatin treatment, did not provoke a synergistic effect at intervals from 37 °C to 41 °C in neither cancer cell line. However, a temperature of 43 °C enhanced cisplatin cytotoxicity for Caco-2 cells. Moreover, isobologram analysis revealed mathematical antagonistic effects of cisplatin and temperature combined treatment in AGS cells; variations between synergistic, additive, and antagonistic effects in Caco-2 cells; and additive and antagonistic effects in T3M4 cells. Combined treatment enhanced initiation of cell apoptosis in AGS, Caco-2, and T3M4 cells by 61%, 20%, and 19% respectively. The increase of intracellular cisplatin concentration was observed at 43 °C by 30%, 20%, and 18% in AGS, Caco-2, and T3M4 cells, respectively.
CONCLUSION In addition to cisplatin, hyperthermia up to 43 °C does not affect the viability of cancer cells in a synergistic manner.
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Affiliation(s)
- Vaidotas Cesna
- Department of Surgery, Lithuanian University of Health Sciences, Kaunas LT-50161, Lithuania
| | - Arturas Sukovas
- Department of Obstetrics and Gynecology, Lithuanian University of Health Sciences, Kaunas LT-50161, Lithuania
| | - Aldona Jasukaitiene
- Institute for Digestive Research, Lithuanian University of Health Sciences, Kaunas LT-50161, Lithuania
| | - Rima Naginiene
- Neuroscience Institute, Lithuanian University of Health Sciences, Kaunas LT-50161, Lithuania
| | - Giedrius Barauskas
- Department of Surgery, Lithuanian University of Health Sciences, Kaunas LT-50161, Lithuania
| | - Zilvinas Dambrauskas
- Institute for Digestive Research, Lithuanian University of Health Sciences, Kaunas LT-50161, Lithuania
| | - Saulius Paskauskas
- Department of Obstetrics and Gynecology, Lithuanian University of Health Sciences, Kaunas LT-50161, Lithuania
| | - Antanas Gulbinas
- Institute for Digestive Research, Lithuanian University of Health Sciences, Kaunas LT-50161, Lithuania
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McGinnis GJ, Friedman D, Young KH, Torres ERS, Thomas CR, Gough MJ, Raber J. Neuroinflammatory and cognitive consequences of combined radiation and immunotherapy in a novel preclinical model. Oncotarget 2018; 8:9155-9173. [PMID: 27893434 PMCID: PMC5354722 DOI: 10.18632/oncotarget.13551] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2016] [Accepted: 11/14/2016] [Indexed: 11/25/2022] Open
Abstract
Background Cancer patients often report behavioral and cognitive changes following cancer treatment. These effects can be seen in patients who have not yet received treatment or have received only peripheral (non-brain) irradiation. Novel treatments combining radiotherapy (RT) and immunotherapy (IT) demonstrate remarkable efficacy with respect to tumor outcomes by enhancing the proinflammatory environment in the tumor. However, a proinflammatory environment in the brain mediates cognitive impairments in other neurological disorders and may affect brain function in cancer patients receiving these novel treatments. Currently, gaps exist as to whether these treatments impact the brain in individuals with or without tumors and with regard to the underlying mechanisms. Results Combined treatment with precision RT and checkpoint inhibitor IT achieved control of tumor growth. However, BALB/c mice receiving combined treatment demonstrated changes in measures of anxiety levels, regardless of tumor status. C57BL/6J mice with tumors demonstrated increased anxiety, except following combined treatment. Object recognition memory was impaired in C57BL/6J mice without tumors following combined treatment. All mice with tumors showed impaired object recognition, except those treated with RT alone. Mice with tumors demonstrated impaired amygdala-dependent cued fear memory, while maintaining hippocampus-dependent context fear memory. These behavioral alterations and cognitive impairments were accompanied by increased microglial activation in mice receiving immunotherapy alone or combined with RT. Finally, based on tumor status, there were significant changes in proinflammatory cytokines (IFN-γ, IL-6, IL-5, IL-2, IL-10) and a growth factor (FGF-basic). Materials and Methods Here we test the hypothesis that IT combined with peripheral RT have detrimental behavioral and cognitive effects as a result of an enhanced proinflammatory environment in the brain. BALB/c mice with or without injected hind flank CT26 colorectal carcinoma or C57BL/6J mice with or without Lewis Lung carcinoma were used for all experiments. Checkpoint inhibitor IT, using an anti-CTLA-4 antibody, and precision CT-guided peripheral RT alone and combined were used to closely model clinical treatment. We assessed behavioral and cognitive performance and investigated the immune environment using immunohistochemistry and multiplex assays to analyze proinflammatory mediators. Conclusions Although combined treatment achieved tumor growth control, it affected the brain and induced changes in measures of anxiety, cognitive impairments, and neuroinflammation.
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Affiliation(s)
- Gwendolyn J McGinnis
- Howard Hughes Medical Institute, Oregon Health and Science University, Portland, OR.,Department of Behavioral Neuroscience, Oregon Health and Science University, Portland, OR.,Department of Radiation Medicine, Oregon Health and Science University, Portland, OR
| | - David Friedman
- Earle A. Chiles Research Institute, Providence Cancer Center, Portland, OR
| | - Kristina H Young
- Earle A. Chiles Research Institute, Providence Cancer Center, Portland, OR
| | - Eileen Ruth S Torres
- Department of Behavioral Neuroscience, Oregon Health and Science University, Portland, OR
| | - Charles R Thomas
- Department of Radiation Medicine, Oregon Health and Science University, Portland, OR
| | - Michael J Gough
- Department of Radiation Medicine, Oregon Health and Science University, Portland, OR.,Earle A. Chiles Research Institute, Providence Cancer Center, Portland, OR
| | - Jacob Raber
- Department of Behavioral Neuroscience, Oregon Health and Science University, Portland, OR.,Department of Radiation Medicine, Oregon Health and Science University, Portland, OR.,Department of Neurology, Oregon Health and Science University, Portland, OR.,Division of Neuroscience, Oregon National Primate Research Center, Portland, OR
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Ibuprofen ameliorates fatigue- and depressive-like behavior in tumor-bearing mice. Life Sci 2015; 143:65-70. [PMID: 26498217 DOI: 10.1016/j.lfs.2015.10.020] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2015] [Revised: 10/06/2015] [Accepted: 10/19/2015] [Indexed: 12/29/2022]
Abstract
AIMS Cancer-related fatigue (CRF) is often accompanied by depressed mood, both of which reduce functional status and quality of life. Research suggests that increased expression of pro-inflammatory cytokines is associated with skeletal muscle wasting and depressive- and fatigue-like behaviors in rodents and cancer patients. We have previously shown that treatment with ibuprofen, a nonsteroidal anti-inflammatory drug, preserved muscle mass in tumor-bearing mice. Therefore, the purpose of the present study was to determine the behavioral effects of ibuprofen in a mouse model of CRF. MAIN METHODS Mice were injected with colon-26 adenocarcinoma cells and treated with ibuprofen (10mg/kg) in the drinking water. Depressive-like behavior was determined using the forced swim test (FST). Fatigue-like behaviors were determined using voluntary wheel running activity (VWRA) and grip strength. The hippocampus, gastrocnemius muscle, and serum were collected for cytokine analysis. KEY FINDINGS Tumor-bearing mice showed depressive-like behavior in the FST, which was not observed in mice treated with ibuprofen. VWRA and grip strength declined in tumor-bearing mice, and ibuprofen attenuated this decline. Tumor-bearing mice had decreased gastrocnemius muscle mass and increased expression of IL-6, MAFBx and MuRF mRNA, biomarkers of protein degradation, in the muscle. Expression of IL-1β and IL-6 was also increased in the hippocampus. Treatment with ibuprofen improved muscle mass and reduced cytokine expression in both the muscle and hippocampus of tumor-bearing mice. SIGNIFICANCE Ibuprofen treatment reduced skeletal muscle wasting, inflammation in the brain, and fatigue- and depressive-like behavior in tumor-bearing mice. Therefore, ibuprofen warrants evaluation as an adjuvant treatment for CRF.
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Norden DM, Devine R, McCarthy DO, Wold LE. Storage Conditions and Passages Alter IL-6 secretion in C26 adenocarcinoma cell lines. MethodsX 2015; 2:53-58. [PMID: 25709898 PMCID: PMC4335308 DOI: 10.1016/j.mex.2015.02.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
The C26 adenocarcinoma tumor line is frequently used to establish peripheral tumors in mice for the study of cancer cachexia and cancer-related fatigue. Recently, we have noticed a progressive decline in the effects of tumor growth on our biological and behavioral measures in the tumor-bearing mice. Therefore, we compared effects of three aliquots of the C26 tumor cell line that differed in storage condition and number of passages on cytokine secretion, tumor growth, weight loss and fatigue behavior. Three aliquots of the C26 tumor line were selected as alpha (α), beta (β), and gamma (γ). Aliquot α was an original C26 stock line that had been stored at −80 °C. Aliquot β was stored in liquid nitrogen. Aliquot γ was taken from aliquot β and passaged three times. The three aliquots of the C26 tumor line showed differences in IL-6 mRNA and protein secretion in vitro, with aliquot β showing the greatest IL-6 secretion. These differences were mirrored in vivo. Plasma IL-6 levels were elevated in all tumor bearing mice but was greatest in group β mice. Carcass weight was decreased in all three tumor groups. Brain expression of IL-1β mRNA was greatest in group β and group β demonstrated the greatest decline in running activity at day 19. Storage conditions and number of passages influence C26 tumor cell secretion of cytokines. Variations in C26 aliquots may explain differences observed between laboratories using the same cell line. We recommend always storing cell lines in liquid nitrogen and limiting the number of passages before use in experiments.
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Affiliation(s)
- Diana M. Norden
- Department of Neuroscience, The Ohio State University, 333 W. 10th Ave, Columbus, OH, United States
| | - Raymond Devine
- Davis Heart and Lung Research Institute, 473 W. 12th Ave, The Ohio State University, Columbus, OH, United States
| | - Donna O. McCarthy
- College of Nursing, Marquette University, Milwaukee, WI, United States
| | - Loren E. Wold
- Davis Heart and Lung Research Institute, 473 W. 12th Ave, The Ohio State University, Columbus, OH, United States
- College of Nursing, The Ohio State University, 1585 Neil Ave, Columbus, OH, United States
- Corresponding author at: 603 Davis Heart and Lung Research Institute, 473 12th Avenue, Columbus, OH 43210, United states. Tel.: +1 614 292 0627.
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Norden DM, Bicer S, Clark Y, Jing R, Henry CJ, Wold LE, Reiser PJ, Godbout JP, McCarthy DO. Tumor growth increases neuroinflammation, fatigue and depressive-like behavior prior to alterations in muscle function. Brain Behav Immun 2015; 43:76-85. [PMID: 25102452 PMCID: PMC4258420 DOI: 10.1016/j.bbi.2014.07.013] [Citation(s) in RCA: 75] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/17/2014] [Revised: 07/01/2014] [Accepted: 07/08/2014] [Indexed: 12/21/2022] Open
Abstract
Cancer patients frequently suffer from fatigue, a complex syndrome associated with loss of muscle mass, weakness, and depressed mood. Cancer-related fatigue (CRF) can be present at the time of diagnosis, during treatment, and persists for years after treatment. CRF negatively influences quality of life, limits functional independence, and is associated with decreased survival in patients with incurable disease. Currently there are no effective treatments to reduce CRF. The aim of this study was to use a mouse model of tumor growth and discriminate between two main components of fatigue: loss of muscle mass/function and altered mood/motivation. Here we show that tumor growth increased fatigue- and depressive-like behaviors, and reduced body and muscle mass. Decreased voluntary wheel running activity (VWRA) and increased depressive-like behavior in the forced swim and sucrose preference tests were evident in tumor-bearing mice within the first two weeks of tumor growth and preceded the loss of body and muscle mass. At three weeks, tumor-bearing mice had reduced grip strength but this was not associated with altered expression of myosin isoforms or impaired contractile properties of muscles. These increases in fatigue and depressive-like behaviors were paralleled by increased expression of IL-1β mRNA in the cortex and hippocampus. Minocycline administration reduced tumor-induced expression of IL-1β in the brain, reduced depressive-like behavior, and improved grip strength without altering muscle mass. Taken together, these results indicate that neuroinflammation and depressed mood, rather than muscle wasting, contribute to decreased voluntary activity and precede major changes in muscle contractile properties with tumor growth.
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Affiliation(s)
- Diana M Norden
- Department of Neuroscience, The Ohio State University, 333 W. 10th Ave., Columbus, OH 43210, United States
| | - Sabahattin Bicer
- Division of Biosciences, College of Dentistry, The Ohio State University, 305 W. 12th Ave., Columbus, OH, United States
| | - Yvonne Clark
- College of Nursing, The Ohio State University, 1585 Neil Ave., Columbus, OH, United States
| | - Runfeng Jing
- College of Nursing, The Ohio State University, 1585 Neil Ave., Columbus, OH, United States
| | - Christopher J Henry
- Department of Neuroscience, The Ohio State University, 333 W. 10th Ave., Columbus, OH 43210, United States
| | - Loren E Wold
- College of Nursing, The Ohio State University, 1585 Neil Ave., Columbus, OH, United States; Department of Physiology and Cell Biology, The Ohio State University, 370 W. 9th Ave., Columbus, OH, United States
| | - Peter J Reiser
- Division of Biosciences, College of Dentistry, The Ohio State University, 305 W. 12th Ave., Columbus, OH, United States
| | - Jonathan P Godbout
- Department of Neuroscience, The Ohio State University, 333 W. 10th Ave., Columbus, OH 43210, United States; Institute for Behavioral Medicine Research, The Ohio State University, 460 Medical Center Dr., Columbus, OH, United States
| | - Donna O McCarthy
- College of Nursing, The Ohio State University, 1585 Neil Ave., Columbus, OH, United States.
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Norden DM, Devine R, Bicer S, Jing R, Reiser PJ, Wold LE, Godbout JP, McCarthy DO. Fluoxetine prevents the development of depressive-like behavior in a mouse model of cancer related fatigue. Physiol Behav 2014; 140:230-5. [PMID: 25554480 DOI: 10.1016/j.physbeh.2014.12.045] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2014] [Revised: 12/16/2014] [Accepted: 12/22/2014] [Indexed: 02/06/2023]
Abstract
Cancer patients frequently suffer from fatigue, a complex syndrome associated with tiredness and depressed mood. Cancer-related fatigue (CRF) can be present at the time of diagnosis, escalates during treatment, and can persist for years after treatment. CRF negatively influences quality of life, limits functional independence, and is associated with decreased survival in patients with incurable disease. We have previously shown that increased pro-inflammatory cytokine expression in the brain contributes to depressive- and fatigue-like behaviors in a mouse model of CRF. Inflammatory cytokines increase the activity of indoleamine 2,3-dioxygenase (IDO) and kynurenine 3-monooxygenase (KMO), which competitively reduce serotonin synthesis. Reduced serotonin availability in the brain and increased production of alternative neuroactive metabolites of tryptophan are thought to contribute to the development of depression and fatigue. The purpose of this study was to determine the effects of fluoxetine, a selective serotonin reuptake inhibitor (SSRI), on brain cytokines and behavioral measures of fatigue and depression in tumor-bearing mice. Here we show that tumor growth increased brain expression of pro-inflammatory cytokines and KMO. Treatment with fluoxetine had no effect on tumor growth, muscle wasting, fatigue behavior, or cytokine expression in the brain. Fluoxetine, however, reduced depressive-like behaviors in tumor bearing mice. In conclusion, our data confirm that increased brain expression of pro-inflammatory cytokines is associated with tumor-induced fatigue- and depressive-like behaviors. However, it is possible to separate the effects of tumor growth on mood and fatigue-like behaviors using SSRIs such as fluoxetine.
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Affiliation(s)
- Diana M Norden
- Department of Neuroscience, The Ohio State University, 333 W. 10th Ave., Columbus, OH, United States
| | - Raymond Devine
- Department of Physiology and Cell Biology, 370 W. 9th Ave., The Ohio State University, Columbus, OH, United States
| | - Sabahattin Bicer
- Division of Biosciences, College of Dentistry, The Ohio State University, 305 W. 12th Ave., Columbus, OH, United States
| | - Runfeng Jing
- College of Nursing, The Ohio State University, 1585 Neil Ave., Columbus, OH, United States
| | - Peter J Reiser
- Division of Biosciences, College of Dentistry, The Ohio State University, 305 W. 12th Ave., Columbus, OH, United States
| | - Loren E Wold
- Department of Physiology and Cell Biology, 370 W. 9th Ave., The Ohio State University, Columbus, OH, United States; College of Nursing, The Ohio State University, 1585 Neil Ave., Columbus, OH, United States
| | - Jonathan P Godbout
- Department of Neuroscience, The Ohio State University, 333 W. 10th Ave., Columbus, OH, United States; Institute for Behavioral Medicine Research, The Ohio State University, 460 Medical Center Dr. Columbus, OH, United States
| | - Donna O McCarthy
- College of Nursing, Marquette University Milwaukee, WI, United States.
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Clark YY, Wold LE, Szalacha LA, McCarthy DO. Ubiquinol reduces muscle wasting but not fatigue in tumor-bearing mice. Biol Res Nurs 2014; 17:321-9. [PMID: 25230747 DOI: 10.1177/1099800414543822] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
PURPOSE Fatigue is the most common and distressing symptom reported by cancer patients during and after treatment. Tumor growth increases oxidative stress and cytokine production, which causes skeletal muscle wasting and cardiac dysfunction. The purpose of this study was to determine whether treatment with the antioxidant ubiquinol improves muscle mass, cardiac function, and behavioral measures of fatigue in tumor-bearing mice. METHOD Adult female mice were inoculated with colon26 tumor cells. Half the control and tumor-bearing mice were administered ubiquinol (500 mg/kg/day) in their drinking water. Voluntary wheel running (i.e., voluntary running activity [VRA]) and grip strength were measured at Days 0, 8, 14, and 17 of tumor growth. Cardiac function was measured using echocardiography on Day 18 or 19. Biomarkers of inflammation, protein degradation, and oxidative stress were measured in serum and heart and gastrocnemius tissue. RESULTS VRA and grip strength progressively declined in tumor-bearing mice. Muscle mass and myocardial diastolic function were decreased, and expression of proinflammatory cytokines was increased in serum and muscle and heart tissue on Day 19 of tumor growth. Oxidative stress was present only in the heart, while biomarkers of protein degradation were increased only in the gastrocnemius muscle. Ubiquinol increased muscle mass in the tumor-bearing and control animals but had no effect on the expression of biomarkers of inflammation, protein degradation, or oxidative stress or on behavioral measures of fatigue.
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Affiliation(s)
- Yvonne Y Clark
- Pain Evaluation and Management Center of Ohio, Dayton, OH, USA
| | - Loren E Wold
- College of Nursing, The Ohio State University, Columbus, OH, USA
| | - Laura A Szalacha
- College of Nursing, The Ohio State University, Columbus, OH, USA
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