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Zhi W, Li Y, Wang Y, Zou Y, Wang H, Xu X, Ma L, Ren Y, Qiu Y, Hu X, Wang L. Effects of 90 dB pure tone exposure on auditory and cardio-cerebral system functions in macaque monkeys. ENVIRONMENTAL RESEARCH 2024; 249:118236. [PMID: 38266893 DOI: 10.1016/j.envres.2024.118236] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Revised: 01/13/2024] [Accepted: 01/16/2024] [Indexed: 01/26/2024]
Abstract
Excessive noise exposure presents significant health risks to humans, affecting not just the auditory system but also the cardiovascular and central nervous systems. This study focused on three male macaque monkeys as subjects. 90 dB sound pressure level (SPL) pure tone exposure (frequency: 500Hz, repetition rate: 40Hz, 1 min per day, continuously exposed for 5 days) was administered. Assessments were performed before exposure, during exposure, immediately after exposure, and at 7-, 14-, and 28-days post-exposure, employing auditory brainstem response (ABR) tests, electrocardiograms (ECG), and electroencephalograms (EEG). The study found that the average threshold for the Ⅴ wave in the right ear increased by around 30 dB SPL right after exposure (P < 0.01) compared to pre-exposure. This elevation returned to normal within 7 days. The ECG results indicated that one of the macaque monkeys exhibited an RS-type QRS wave, and inverted T waves from immediately after exposure to 14 days, which normalized at 28 days. The other two monkeys showed no significant changes in their ECG parameters. Changes in EEG parameters demonstrated that main brain regions exhibited significant activation at 40Hz during noise exposure. After noise exposure, the power spectral density (PSD) in main brain regions, particularly those represented by the temporal lobe, exhibited a decreasing trend across all frequency bands, with no clear recovery over time. In summary, exposure to 90 dB SPL noise results in impaired auditory systems, aberrant brain functionality, and abnormal electrocardiographic indicators, albeit with individual variations. It has implications for establishing noise protection standards, although the precise mechanisms require further exploration by integrating pathological and behavioral indicators.
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Affiliation(s)
- Weijia Zhi
- Beijing Institute of Radiation Medicine, Beijing, China.
| | - Ying Li
- Beijing Institute of Radiation Medicine, Beijing, China.
| | - Yuchen Wang
- Beijing Institute of Radiation Medicine, Beijing, China.
| | - Yong Zou
- Beijing Institute of Radiation Medicine, Beijing, China.
| | - Haoyu Wang
- Beijing Institute of Radiation Medicine, Beijing, China.
| | - Xinping Xu
- Beijing Institute of Radiation Medicine, Beijing, China.
| | - Lizhen Ma
- Beijing Institute of Radiation Medicine, Beijing, China.
| | - Yanling Ren
- Animal Center of the Academy of Military Medical Sciences, Beijing, China.
| | - Yefeng Qiu
- Animal Center of the Academy of Military Medical Sciences, Beijing, China.
| | - Xiangjun Hu
- Beijing Institute of Radiation Medicine, Beijing, China.
| | - Lifeng Wang
- Beijing Institute of Radiation Medicine, Beijing, China.
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Morales-Rubio R, Bernal-Ramírez J, Rubio-Infante N, Luévano-Martínez LA, Ríos A, Escalante BA, García-Rivas G, Rodríguez González J. Cellular shortening and calcium dynamics are improved by noisy stimulus in a model of cardiomyopathy. Sci Rep 2023; 13:14898. [PMID: 37689752 PMCID: PMC10492796 DOI: 10.1038/s41598-023-41611-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Accepted: 08/29/2023] [Indexed: 09/11/2023] Open
Abstract
Noise is present in cell biology. The capability of cells to respond to noisy environment have become essential. This study aimed to investigate whether noise can enhance the contractile response and Ca2+ handling in cardiomyocytes from a cardiomyopathy model. Experiments were conducted in an experimental setup with Gaussian white noise, frequency, and amplitude control to stimulate myocytes. Cell shortening, maximal shortening velocity, time to peak shortening, and time to half relaxation variables were recorded to cell shortening. Ca2+ transient amplitude and raise rate variables were registered to measure Ca2+ transients. Our results for cell shortening, Ca2+ transient amplitude, and raise rate suggest that cell response improve when myocytes are noise stimulated. Also, cell shortening, maximal shortening velocity, Ca2+ transient amplitude, and raise improves in control cells. Altogether, these findings suggest novel characteristics in how cells improve their response in a noisy environment.
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Affiliation(s)
- Russell Morales-Rubio
- Centro de Investigación y de Estudios Avanzados del I.P.N-Unidad Monterrey, Vía del Conocimiento 201, Parque de Investigación e Innovación Tecnológica, 66600, Apodaca, NL, México
| | - Judith Bernal-Ramírez
- Tecnologico de Monterrey, Escuela de Medicina y Ciencias de la Salud, Cátedra de Cardiología, Hospital Zambrano Hellion, TecSalud, San Pedro Garza García, México
- The Institute for Obesity Research, Tecnologico de Monterrey, Monterrey, Mexico
| | - Nestor Rubio-Infante
- Tecnologico de Monterrey, Escuela de Medicina y Ciencias de la Salud, Cátedra de Cardiología, Hospital Zambrano Hellion, TecSalud, San Pedro Garza García, México
- The Institute for Obesity Research, Tecnologico de Monterrey, Monterrey, Mexico
| | - Luis A Luévano-Martínez
- Tecnologico de Monterrey, Escuela de Medicina y Ciencias de la Salud, Cátedra de Cardiología, Hospital Zambrano Hellion, TecSalud, San Pedro Garza García, México
- The Institute for Obesity Research, Tecnologico de Monterrey, Monterrey, Mexico
| | - Amelia Ríos
- Centro de Investigación y de Estudios Avanzados del I.P.N-Unidad Monterrey, Vía del Conocimiento 201, Parque de Investigación e Innovación Tecnológica, 66600, Apodaca, NL, México
| | - Bruno A Escalante
- Centro de Investigación y de Estudios Avanzados del I.P.N-Unidad Monterrey, Vía del Conocimiento 201, Parque de Investigación e Innovación Tecnológica, 66600, Apodaca, NL, México
| | - Gerardo García-Rivas
- Tecnologico de Monterrey, Escuela de Medicina y Ciencias de la Salud, Cátedra de Cardiología, Hospital Zambrano Hellion, TecSalud, San Pedro Garza García, México
- The Institute for Obesity Research, Tecnologico de Monterrey, Monterrey, Mexico
| | - Jesús Rodríguez González
- Centro de Investigación y de Estudios Avanzados del I.P.N-Unidad Monterrey, Vía del Conocimiento 201, Parque de Investigación e Innovación Tecnológica, 66600, Apodaca, NL, México.
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Ramírez Hurtado AL, Martínez FV, Diaz Galindo CA, Cuellar KG, Villareal Reyna SZ, Sánchez Herrera DP, Rodríguez González J. Noisy stimulation effect in calcium dynamics on cardiac cells. Exp Cell Res 2020; 396:112319. [PMID: 33039368 DOI: 10.1016/j.yexcr.2020.112319] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2020] [Revised: 10/05/2020] [Accepted: 10/07/2020] [Indexed: 11/24/2022]
Abstract
Noise is present in nature, and it affects the nervous and cardiovascular system. Noise added to stimuli may change the performance of excitable cells. In this paper, we study the effect of noise on the two main heart cell types: pacemaker and myocardial cells. This study investigates whether noise can induce changes in calcium dynamics on the two main heart cell types: pacemaker and myocardial cells, when stimuli with periodic electrical signals are disturbed by Gaussian white noise. Calcium dynamic parameters were obtained using imaging signals. Our results show that low intensities of noise favor amplitude and raise rate calcium dynamics, although our results show that the pacemaker cells are not affected by a noisy stimulus. Altogether, these findings suggest that noise plays a key role in calcium dynamics.
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Affiliation(s)
- Alberto Luis Ramírez Hurtado
- Centro de Investigación y de Estudios Avanzados del I.P.N - Unidad Monterrey, Vía del Conocimiento 201, Parque de Investigación e Innovación Tecnológica, C.P.: 66600, Apodaca, Nuevo León, Mexico
| | - Fernando Villafranca Martínez
- Centro de Investigación y de Estudios Avanzados del I.P.N - Unidad Monterrey, Vía del Conocimiento 201, Parque de Investigación e Innovación Tecnológica, C.P.: 66600, Apodaca, Nuevo León, Mexico
| | - Carlos Alberto Diaz Galindo
- Centro de Investigación y de Estudios Avanzados del I.P.N - Unidad Monterrey, Vía del Conocimiento 201, Parque de Investigación e Innovación Tecnológica, C.P.: 66600, Apodaca, Nuevo León, Mexico
| | - Karen Garza Cuellar
- Centro de Investigación y de Estudios Avanzados del I.P.N - Unidad Monterrey, Vía del Conocimiento 201, Parque de Investigación e Innovación Tecnológica, C.P.: 66600, Apodaca, Nuevo León, Mexico
| | - Sandra Zue Villareal Reyna
- Centro de Investigación y de Estudios Avanzados del I.P.N - Unidad Monterrey, Vía del Conocimiento 201, Parque de Investigación e Innovación Tecnológica, C.P.: 66600, Apodaca, Nuevo León, Mexico
| | - Daniel Paulo Sánchez Herrera
- Centro de Investigación y de Estudios Avanzados del I.P.N - Unidad Monterrey, Vía del Conocimiento 201, Parque de Investigación e Innovación Tecnológica, C.P.: 66600, Apodaca, Nuevo León, Mexico.
| | - Jesús Rodríguez González
- Centro de Investigación y de Estudios Avanzados del I.P.N - Unidad Monterrey, Vía del Conocimiento 201, Parque de Investigación e Innovación Tecnológica, C.P.: 66600, Apodaca, Nuevo León, Mexico.
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Clancy CE, Santana LF. Evolving Discovery of the Origin of the Heartbeat: A New Perspective on Sinus Rhythm. JACC Clin Electrophysiol 2020; 6:932-934. [PMID: 32819527 DOI: 10.1016/j.jacep.2020.07.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Accepted: 07/01/2020] [Indexed: 12/01/2022]
Affiliation(s)
- Colleen E Clancy
- Department of Physiology and Membrane Biology, University of California-Davis, Davis, California, USA.
| | - L Fernando Santana
- Department of Physiology and Membrane Biology, University of California-Davis, Davis, California, USA.
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