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Ambattu LA, Yeo LY. Sonomechanobiology: Vibrational stimulation of cells and its therapeutic implications. BIOPHYSICS REVIEWS 2023; 4:021301. [PMID: 38504927 PMCID: PMC10903386 DOI: 10.1063/5.0127122] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Accepted: 02/27/2023] [Indexed: 03/21/2024]
Abstract
All cells possess an innate ability to respond to a range of mechanical stimuli through their complex internal machinery. This comprises various mechanosensory elements that detect these mechanical cues and diverse cytoskeletal structures that transmit the force to different parts of the cell, where they are transcribed into complex transcriptomic and signaling events that determine their response and fate. In contrast to static (or steady) mechanostimuli primarily involving constant-force loading such as compression, tension, and shear (or forces applied at very low oscillatory frequencies (≤ 1 Hz) that essentially render their effects quasi-static), dynamic mechanostimuli comprising more complex vibrational forms (e.g., time-dependent, i.e., periodic, forcing) at higher frequencies are less well understood in comparison. We review the mechanotransductive processes associated with such acoustic forcing, typically at ultrasonic frequencies (> 20 kHz), and discuss the various applications that arise from the cellular responses that are generated, particularly for regenerative therapeutics, such as exosome biogenesis, stem cell differentiation, and endothelial barrier modulation. Finally, we offer perspectives on the possible existence of a universal mechanism that is common across all forms of acoustically driven mechanostimuli that underscores the central role of the cell membrane as the key effector, and calcium as the dominant second messenger, in the mechanotransduction process.
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Affiliation(s)
- Lizebona August Ambattu
- Micro/Nanophysics Research Laboratory, School of Engineering, RMIT University, Melbourne VIC 3000, Australia
| | - Leslie Y. Yeo
- Micro/Nanophysics Research Laboratory, School of Engineering, RMIT University, Melbourne VIC 3000, Australia
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2
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Vahl JM, Keppeler JVA, Krahe D, Bahrke-Rein K, Reiter R, Hoffmann TK, Goldberg-Bockhorn E. [Infrasound - implications for human medicine]. HNO 2022; 70:921-930. [PMID: 36239759 DOI: 10.1007/s00106-022-01237-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/12/2022] [Indexed: 11/30/2022]
Abstract
Infrasound describes ubiquitous, low-frequency sound (< 20 Hz) in the environment with a long wavelength below the median hearing threshold, which can nevertheless be heard and tactilely perceived, depending on the sound pressure level and frequency spectrum. In nature, infrasound emissions usually occur only in the low-threshold range. Nevertheless, after strong and chronic exposure to usually artificially generated infrasound emissions, various effects on the ear and the body, sometimes questionably critical to health, can be observed. Correct measurement and assessment of infrasound sources is complex and controversial. Established guidelines are scarce. Innovative research areas include infrasound monitoring for evaluation of natural events and infrasound applications in medicine. In the future, it is hoped that new insights will be gained from infrasound research and that a more extensive classification in occupational medicine will be possible.
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Affiliation(s)
- J M Vahl
- Klinik für Hals‑, Nasen‑, Ohrenheilkunde und Kopf-Hals-Chirurgie, Universitätsklinikum Ulm, Frauensteige 12, 89075, Ulm, Deutschland.
| | - J V A Keppeler
- Klinik für Hals‑, Nasen‑, Ohrenheilkunde und Kopf-Hals-Chirurgie, Universitätsklinikum Ulm, Frauensteige 12, 89075, Ulm, Deutschland
| | - D Krahe
- Fakultät für Elektrotechnik, Informations- und Medientechnik, Bergische Universität Wuppertal, Wuppertal, Deutschland
| | - K Bahrke-Rein
- Fachgebiet Systemzuverlässigkeit, Adaptronik und Maschinenakustik, Technische Universität Darmstadt, Darmstadt, Deutschland
| | - R Reiter
- Sektion Phoniatrie und Pädaudiologie, Universitätsklinikum Ulm, Ulm, Deutschland
| | - T K Hoffmann
- Klinik für Hals‑, Nasen‑, Ohrenheilkunde und Kopf-Hals-Chirurgie, Universitätsklinikum Ulm, Frauensteige 12, 89075, Ulm, Deutschland
| | - E Goldberg-Bockhorn
- Klinik für Hals‑, Nasen‑, Ohrenheilkunde und Kopf-Hals-Chirurgie, Universitätsklinikum Ulm, Frauensteige 12, 89075, Ulm, Deutschland
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Baeza Moyano D, González Lezcano RA. Effects of infrasound on health: looking for improvements in housing conditions. INTERNATIONAL JOURNAL OF OCCUPATIONAL SAFETY AND ERGONOMICS 2020; 28:809-823. [PMID: 33019907 DOI: 10.1080/10803548.2020.1831787] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
The latest technological innovations have considerably increased the field of application for infrasound, and the possible risks that infrasound may present to those exposed to it must be taken into account. The main task of this article is to organize and summarize recent studies on the most common artificial emitting sources and the effects that these non-audible frequencies have on health when absorbed by the body, as well as presenting the existing regulations, a discussion and a series of conclusions that clarify aspects of infrasound. The intention of the authors of this article is that what is exposed in this review can be used to address and determine future lines of research and promote architects to take the spaces of installations within a building very seriously as well as carry out competent administration considering a minimum distance from the road to where habitable buildings are planned.
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Affiliation(s)
- David Baeza Moyano
- Department of Chemistry and Biochemistry, University San Pablo CEU, Spain
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Lu M, Qin X, Yao J, Yang Y, Zhao M, Sun L. MiR
‐134‐5p targeting
XIAP
modulates oxidative stress and apoptosis in cardiomyocytes under hypoxia/reperfusion‐induced injury. IUBMB Life 2020; 72:2154-2166. [PMID: 32797709 DOI: 10.1002/iub.2351] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Revised: 06/17/2020] [Accepted: 07/03/2020] [Indexed: 12/16/2022]
Affiliation(s)
- Min Lu
- Department of Cardiologry Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, School of Clinical Medicine Zhengzhou Henan China
| | - Xinglei Qin
- Department of Hepatobiliary Surgery Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, School of Clinical Medicine Zhengzhou Henan China
| | - Jungong Yao
- Department of Cardiologry Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, School of Clinical Medicine Zhengzhou Henan China
| | - Yuanyuan Yang
- Department of Cardiologry Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, School of Clinical Medicine Zhengzhou Henan China
| | - Minghu Zhao
- Department of Cardiologry Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, School of Clinical Medicine Zhengzhou Henan China
| | - Lin Sun
- Department of Cardiologry Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, School of Clinical Medicine Zhengzhou Henan China
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Atrial fibrosis and decreased connexin 43 in rat hearts after exposure to high-intensity infrasound. Exp Mol Pathol 2020; 114:104409. [PMID: 32088192 DOI: 10.1016/j.yexmp.2020.104409] [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] [Received: 11/23/2019] [Revised: 01/02/2020] [Accepted: 02/19/2020] [Indexed: 11/22/2022]
Abstract
BACKGROUND Noise is an important environmental risk factor. Industrial environments are rich in high-intensity infrasound (hi-IFS), which we have found to induce myocardial and coronary perivascular fibrosis in rats. The effects of exposure to IFS on the ventricles have been studied, but not on the atria. We hypothesized that rats exposed to hi-IFS develop atrial remodeling involving fibrosis and connexin 43, which we sought to evaluate. MATERIAL AND METHODS Seventy-two Wistar rats, half exposed to hi-IFS (120 dB, <20 Hz) during a maximum period of 12 weeks and half age-matched controls, were studied. Atrial fibrosis was analyzed by Chromotrope-aniline blue staining. The immunohistochemical evaluation of Cx43 was performed using the polyclonal antibody connexin-43 m diluted 1:1000 at 4 °C overnight. Digitized images were obtained with an optical microscope using 400× magnifications. The measurements were performed using image J software. A two-way ANOVA model was used to compare the groups. RESULTS The mean values of the ratio "atrial fibrosis / cardiomyocytes" increased to a maximum of 0.1095 ± 0,04 and 0.5408 ± 0,01, and of the ratio "CX43 / cardiomyocytes" decreased to 0.0834 ± 0,03 and 0.0966 ± 0,03, respectively in IFS-exposed rats and controls. IFS-exposed rats exhibited a significantly higher ratio of fibrosis (p < .001) and lower ratio of Cx43 (p = .009). CONCLUSION High-intensity infrasound exposure leads to an increase in atrial interstitial fibrosis and a decrease in connexin 43 in rat hearts. This finding reinforces the need for further experimental and clinical studies concerning the effects of exposure to infrasound.
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Tetrahydroxystilbene Glucoside Ameliorates Infrasound-Induced Central Nervous System (CNS) Injury by Improving Antioxidant and Anti-Inflammatory Capacity. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2020; 2020:6576718. [PMID: 31998440 PMCID: PMC6977337 DOI: 10.1155/2020/6576718] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/03/2019] [Revised: 11/27/2019] [Accepted: 12/06/2019] [Indexed: 11/17/2022]
Abstract
Background Infrasound is a major threat to global health by causing injuries of the central nervous system (CNS). However, there remains no effective therapeutic agent for preventing infrasound-caused CNS injury. 2,3,5,4'-Tetrahydroxystilbene-2-O-β-D-glycoside (THSG) exerts protective function against CNS injuries and may have beneficial effects on infrasound-induced CNS impairment. Methods A mouse model with CNS (oxidative stress-induced inflammation and neuronal apoptosis) injuries was established when the mouse was exposed to the infrasound of 16 Hz at 130 dB for 2 h each day and the duration of treatment was 8 d. The mice were divided into the control (CG, healthy mice), the model (MG, model mice), and the THSG (EG, experimental group, model mice treated with THSG) groups. The learning and memory impairments caused by infrasound were examined using a Morris water maze test. Lipid profiles, antioxidant biomarkers, and inflammatory cytokines in hippocampus tissue were measured by using corresponding ELISA kits. Meanwhile, BCL-2/BAX/caspase-3 signaling pathway was measured in the hippocampi and prefrontal cortex of the mouse brain using real-time qPCR and Western blot. Nissl's stain was used to measure neuronal necrosis in the hippocampi and prefrontal cortex of the mouse brain. Results THSG significantly ameliorated the learning and memory impairments caused by infrasound. On the other hand, THSG improved lipid profiles, increased antioxidant properties by affecting the levels of superoxide dismutase (SOD), glutathione peroxidase (GSH-Px), catalase (CAT), and malondialdehyde (MDA), and displayed anti-inflammatory action via the downregulation of IL- (interleukin-) 6, IL-8, IL-10, TNF- (tumor necrosis factor-) α, and hs-CRP (high-sensitivity C-reactive protein) in the hippocampal tissues of the mouse model (P < 0.05). Additionally, Nissl's stain showed that THSG inhibited infrasound-induced neuronal necrosis in the hippocampi and prefrontal cortex. Besides, THSG exerted antiapoptosis function by upregulating the level of Bcl-2 and downregulating the levels of BAX and caspase-3 in the hippocampi. Conclusion THSG may be an effective anti-infrasound drug against CNS injury by improving antioxidant, anti-inflammatory, antiapoptosis, and antinecrosis capacities. Further research is still needed to confirm the exact molecular mechanism.
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Lousinha A, R Oliveira MJ, Borrecho G, Brito J, Oliveira P, Oliveira de Carvalho A, Freitas D, P Águas A, Antunes E. Infrasound induces coronary perivascular fibrosis in rats. Cardiovasc Pathol 2018; 37:39-44. [PMID: 30342320 DOI: 10.1016/j.carpath.2018.10.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/20/2018] [Revised: 09/27/2018] [Accepted: 10/03/2018] [Indexed: 01/02/2023] Open
Abstract
BACKGROUND Chronic exposure to industrial noise is known to affect biological systems, namely, by inducing fibrosis in the absence of inflammatory cells. In rat hearts exposed to this environmental hazard, we have previously found myocardial and perivascular fibrosis. The acoustic spectrum of industrial environments is particularly rich in high-intensity infrasound (<20 Hz), whose effects on the heart are unknown. We evaluated the morphological changes induced by IFS in rat coronaries in the presence and absence of dexamethasone. METHODS Adult Wistar rats were divided into three groups: group A (GA)-IFS (<20 Hz, 120 dB)-exposed rats for 28 days treated with dexamethasone; group B (GB)-IFS-exposed rats; group C (GC)-age-matched controls. The midventricle was prepared for observation with an optical microscope using 100× magnification. Thirty-one arterial vessels were selected (GA 8, GB 10, GC 13). The vessel caliber, thickness of the wall, and perivascular dimensions were quantified using image J software. Mann-Whitney and Kruskal-Wallis tests were used to compare the groups for lumen-to-vessel wall (L/W) and vessel wall-to-perivascular tissue (W/P) ratios. RESULTS IFS-exposed rats exhibited a prominent perivascular tissue. The median L/W and median W/P ratios were 0.54 and 0.48, 0.66 and 0.49, and 0.71 and 0.68, respectively, in GA, GB, and GC. The W/P ratio was significantly higher in GC compared with IFS-exposed animals (P=.001). The difference was significant between GC and GB (P=.008) but not between GC and GA. CONCLUSION IFS induces coronary perivascular fibrosis that differs under treatment with corticosteroid.
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Affiliation(s)
- Ana Lousinha
- Center for Interdisciplinary Research Egas Moniz (CIIEM), Health Sciences Institute, Monte de Caparica, Portugal.
| | - Maria João R Oliveira
- Department of Anatomy and UMIB, Abel Salazar Institute of Biomedical Sciences (ICBAS), University of Porto, Porto, Portugal.
| | - Gonçalo Borrecho
- Center for Interdisciplinary Research Egas Moniz (CIIEM), Health Sciences Institute, Monte de Caparica, Portugal.
| | - José Brito
- Center for Interdisciplinary Research Egas Moniz (CIIEM), Health Sciences Institute, Monte de Caparica, Portugal.
| | - Pedro Oliveira
- Center for Interdisciplinary Research Egas Moniz (CIIEM), Health Sciences Institute, Monte de Caparica, Portugal.
| | | | | | - Artur P Águas
- Department of Anatomy and UMIB, Abel Salazar Institute of Biomedical Sciences (ICBAS), University of Porto, Porto, Portugal.
| | - Eduardo Antunes
- Center for Interdisciplinary Research Egas Moniz (CIIEM), Health Sciences Institute, Monte de Caparica, Portugal.
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9
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Serum Exosomes Attenuate H 2O 2-Induced Apoptosis in Rat H9C2 Cardiomyocytes via ERK1/2. J Cardiovasc Transl Res 2018; 12:37-44. [PMID: 29404859 DOI: 10.1007/s12265-018-9791-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/08/2017] [Accepted: 01/09/2018] [Indexed: 12/30/2022]
Abstract
Exosomes are small-sized vesicles that can be released from cells into the serum. Exosomes play important roles in regulating many biological processes including cell proliferation, apoptosis, cell cycle, and metabolism. However, the roles and mechanisms of plasma exosomes in the apoptosis of rat H9C2 cardiomyocytes are largely unknown. In this study, we isolated plasma exosomes as confirmed by the marker protein CD63. Using flow cytometry and western blot analysis, we found that exosomes attenuated hydrogen peroxide (H2O2)-induced apoptosis and improved survival of rat H9C2 cardiomyocytes. Furthermore, the anti-apoptosis effects of serum exosomes in rat H9C2 cardiomyocytes were mediated by the activation of ERK1/2 signaling pathway. These data indicated that plasma exosomes had the protective effects against cardiomyocyte apoptosis and might be a novel therapy strategy for myocardial injury.
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Jin W, Deng QQ, Chen BY, Lu ZX, Li Q, Zhao HK, Chang P, Yu J, Pei ZH. Inhibitory effects of low decibel infrasound on the cardiac fibroblasts and the involved mechanism. Noise Health 2017; 19:149-153. [PMID: 28615545 PMCID: PMC5501025 DOI: 10.4103/nah.nah_14_16] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
INTRODUCTION Infrasound is a mechanical vibration wave with frequency between 0.0001 and 20 Hz. It has been established that infrasound of 120 dB or stronger is dangerous to humans. However, the biological effects of low decibel infrasound are largely unknown. The purpose of this study was to investigate the effects of low decibel infrasound on the cardiac fibroblasts. MATERIALS AND METHODS The cardiac fibroblasts were isolated and cultured from Sprague-Dawley rats. The cultured cells were assigned into the following four groups: control group, angiotensin II (Ang II) group, infrasound group, and Ang II+infrasound group. The cell proliferation and collagen synthesis rates were evaluated by means of [3H]-thymidine and [3H]-proline incorporation, respectively. The levels of TGF-β were determined by enzyme-linked immunosorbent assay. Moreover, RNAi approaches were used for the analysis of the biological functions of miR-29a, and the phosphorylation status of Smad3 was detected using western blotting analysis. RESULTS The results showed that low decibel infrasound significantly alleviated Ang II-induced enhancement of cell proliferation and collagen synthesis. DISCUSSION Compared with the control, Ang II markedly decreased the expression of miR-29a levels and increased the secretion of TGF-β and phosphorylation of Smad3, which was partly reversed by the treatment with low decibel infrasound. Importantly, knockdown of miR-29a diminished the effects of infrasound on the cardiac fibroblasts. In conclusion, low decibel infrasound inhibits Ang II-stimulated cardiac fibroblasts via miR-29a targeting TGF-β/Smad3 signaling.
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Affiliation(s)
- Wei Jin
- Department of Cardiology, Third Hospital of Nanchang, Nanchang, China
| | - Qin-Qin Deng
- Department of Cardiology, Third Hospital of Nanchang, Nanchang, China
| | - Bao-Ying Chen
- Department of Radiology, Second Affiliated Hospital, Fourth Military Medical University, Xi'an, China
| | - Zhen-Xing Lu
- Department of Cardiology, Third Hospital of Nanchang, Nanchang, China
| | - Qing Li
- Department of Cardiology, Third Hospital of Nanchang, Nanchang, China
| | - Hai-Kang Zhao
- Department of Neurosurgery, Second Affiliated Hospital, Xi'an Medical University, Xi'an, China
| | - Pan Chang
- Central Laboratory, Second Affiliated Hospital, Xi'an Medical University, Xi'an, China
| | - Jun Yu
- Central Laboratory, Second Affiliated Hospital, Xi'an Medical University, Xi'an, China
| | - Zhao-Hui Pei
- Department of Cardiology, Third Hospital of Nanchang, Nanchang, China
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He R, Fan J. Effects of infrasound on the growth of bone marrow mesenchymal stem cells: a pilot study. Mol Med Rep 2014; 10:2427-32. [PMID: 25175368 DOI: 10.3892/mmr.2014.2508] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2013] [Accepted: 05/09/2014] [Indexed: 11/05/2022] Open
Abstract
Poor viability of transplanted bone marrow mesenchymal stem cells (BMSCs) is well‑known, but developing methods for enhancing the viability of BMSCs requires further investigation. The aim of the present study was to elucidate the effects of infrasound on the proliferation and apoptosis of BMSCs, and to determine the association between survivin expression levels and infrasound on BMSCs. Primary BMSCs were derived from Sprague Dawley rats. The BMSCs, used at passage three, were divided into groups that received infrasound for 10, 30, 60, 90 or 120 min, and control groups, which were exposed to the air for the same durations. Infrasound was found to promote proliferation and inhibit apoptosis in BMSCs. The results indicated that 60 min was the most suitable duration for applied infrasound treatment to BMSCs. The protein and mRNA expression levels of survivin in BMSCs from the two treatment groups that received 60 min infrasound or air, were examined by immunofluorescence and quantitative polymerase chain reaction. Significant differences in survivin expression levels were identified between the two groups, as infrasound enhanced the expression levels of survivin. In conclusion, infrasound promoted proliferation and inhibited apoptosis in BMSCs, and one mechanisms responsible for the protective effects may be the increased expression levels of survivin.
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Affiliation(s)
- Renhong He
- Department of Rehabilitation Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
| | - Jianzhong Fan
- Department of Rehabilitation Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
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Pei Z, Meng R, Zhuang Z, Zhao Y, Liu F, Zhu MZ, Li R. Cardiac peroxisome proliferator-activated receptor-γ expression is modulated by oxidative stress in acutely infrasound-exposed cardiomyocytes. Cardiovasc Toxicol 2014; 13:307-15. [PMID: 23632742 PMCID: PMC3834180 DOI: 10.1007/s12012-013-9211-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The aim of the present study was to examine the effects of acute infrasound exposure on oxidative damage and investigate the underlying mechanisms in rat cardiomyocytes. Neonatal rat cardiomyocytes were cultured and exposed to infrasound for several days. In the study, the expression of CAT, GPx, SOD1, and SOD2 and their activities in rat cardiomyocytes in infrasound exposure groups were significantly decreased compared to those in the various time controls, along with significantly higher levels of O2− and H2O2. Decreased cardiac cell viability was not observed in various time controls. A significant reduction in cardiac cell viability was observed in the infrasound group compared to the control, while significantly increased cardiac cell viability was observed in the infrasound exposure and rosiglitazone pretreatment group. Compared to the control, rosiglitazone significantly upregulated CAT, GPx, SOD1, and SOD2 expression and their activities in rat cardiomyocytes exposed to infrasound, while the levels of O2− or H2O2 were significantly decreased. A potential link between a significant downregulation of PPAR-γ expression in rat cardiomyocytes in the infrasound group was compared to the control and infrasound-induced oxidative stress. These findings indicate that infrasound can induce oxidative damage in rat cardiomyocytes by inactivating PPAR-γ.
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Affiliation(s)
- Zhaohui Pei
- Department of Cardiology, The Third Hospital of Nanchang, Nanchang, 330009, Jiangxi, China,
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Epigallocatechin gallate (EGCG) attenuates infrasound-induced neuronal impairment by inhibiting microglia-mediated inflammation. J Nutr Biochem 2014; 25:716-25. [DOI: 10.1016/j.jnutbio.2014.02.012] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2013] [Revised: 01/27/2014] [Accepted: 02/27/2014] [Indexed: 01/06/2023]
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Santana ET, Serra AJ, Silva Junior JA, Bocalini DS, Barauna VG, Krieger JE, Tucci PJF. Aerobic exercise training induces an anti-apoptotic milieu in myocardial tissue. MOTRIZ: REVISTA DE EDUCACAO FISICA 2014. [DOI: 10.1590/s1980-65742014000200015] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
This study evaluated modulators of apoptosis in the myocardium of rats subjected to exercise training. Rats were assigned to non-trained and exercise-trained groups, respectively. The animals ran for 1 h per day, 6 times per week and, for a total of 13 weeks. The left ventricle was processed for analysis of gene and protein anti- (Bcl-2, c-IAP1, c-IAP2, Survivin, ILK, Akt and pAkt) and pro- (Bad) apoptotic expression by real-time PCR (except for Akt and pAkt) and Western blot, respectively. The Bad mRNA (p<0.05), but not the protein expression (p = 0.19), was significantly lower after training. The exercise training significantly increased the gene and protein expression for all anti-apoptotic factors. However, a significant change in the c-IAP2 was seen only for gene expression (p<0.05). The present findings indicate that exercise can create a favorable milieu for the survival of cardiomyocytes when apoptosis is increased.
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