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Tsou CH, Pon LS, Liang JZ, Chan YH, Chen KJ, Cheng FS, Kao T, Yang SW. Response of heart rate variability and cardiorespiratory phase synchronization to routine bronchodilator test in patients with asthma. CHINESE J PHYSIOL 2021; 64:177-185. [PMID: 34472448 DOI: 10.4103/cjp.cjp_19_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
Heart rate variability (HRV) and cardiorespiratory phase synchronization (CRPS) were employed to study the cardio- and respiratory interactions in patients with asthma receiving inhalation of beta2-agonist (Berotec 200 mcg) for routine bronchodilator test. Both time- and frequency-domain parameters were used to analyze the HRV. A weighted G-index was introduced to study the quality of the CRPS. The HRV parameters, in both the time and frequency domains, exhibited significant changes pointing to a sympathetic activation of the autonomic balance immediately after the inhalation. On the other hand, the CRPS index barely changed throughout the entire process. This indicates that inhalation of beta2-agonist does not alter the CRPS appreciably, and that the CRPS, in contrast to HRV, is relatively stable in response to the inhalation of beta2-agonist in patients with asthma.
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Affiliation(s)
- Chih-Hsiang Tsou
- Division of Chest Medicine, Ren-Ai Branch, Taipei City Hospital, Taipei; Department of Medicine, School of Medicine, National Yang Ming Chiao Tung University, Taiwan
| | - Lin-Sen Pon
- Department of Electric Engineering, Chinese Culture University, Taipei, Taiwan
| | - Jun-Zhi Liang
- Department of Physics, Fu-Jen Catholic University, New Taipei City, Taiwan
| | - Yun-Hsiang Chan
- Division of Chest Medicine, Ren-Ai Branch, Taipei City Hospital, Taipei, Taiwan
| | - Kuan-Jung Chen
- Division of Chest Medicine, Ren-Ai Branch, Taipei City Hospital, Taipei, Taiwan
| | - Feng-Shiang Cheng
- Department of Education and Research, Taipei City Hospital, Taipei, Taiwan
| | - Tsair Kao
- Medical Division, ACME Portable Machines, Inc., New Taipei City, Taiwan
| | - Sai-Wei Yang
- Department of Biomedical Engineering, National Yang Ming Chiao Tung University, Taipei, Taiwan
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Franco OS, Júnior AOS, Signori LU, Prietsch SOM, Zhang L. Cardiac autonomic modulation assessed by heart rate variability in children with asthma. Pediatr Pulmonol 2020; 55:1334-1339. [PMID: 32119199 DOI: 10.1002/ppul.24714] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/25/2019] [Accepted: 02/22/2020] [Indexed: 01/24/2023]
Abstract
OBJECTIVE To assess cardiac autonomic modulation, measured by short-term frequency domain analysis of heart rate variability (HRV), in children with asthma. METHODS We conducted an observational study at a tertiary care teaching hospital. The sample consisted of 119 children aged 7 to 15 years with asthma and 56 age-matched healthy controls. Frequency domain HRV measures included low-frequency (LF; 0.04-0.15 Hz), high-frequency (HF; 0.15-0.4 Hz), and LF/HF ratio. The LF and HF components were expressed in both absolute values of power (ms2 ) and in normalized units (nu). RESULTS Compared with healthy controls, asthmatic children had significantly higher value of HF (nu) (mean ± standard deviation: 45.9 ± 14.6 vs 40.7 ± 13.6; P = .02), and lower values of LF (nu) (54.1 ± 14.6 vs 59.3 ± 13.6; P = .02) and LF/HF ratio (median, interquartile range: 1.12, 0.82-1.88 vs 1.59, 1.02-2.08; P = .03). We did not find significant differences between children with persistent and intermittent asthma, and between children with well-controlled and partially-controlled or uncontrolled asthma, in terms of HRV measures. CONCLUSIONS Children with stable chronic asthma may have a cardiac autonomic imbalance with a possible enhanced parasympathetic modulation, as assessed by short-term frequency domain analysis of HRV. Neither asthma severity nor asthma control was significantly associated with HRV measures, but the study did not have enough power to draw a firm conclusion on this point.
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Affiliation(s)
- Ozeia S Franco
- Pediatric Pulmonology Division, Postgraduate Program in Health Sciences and Postgraduate Program in Public Health, Faculty of Medicine, Federal University of Rio Grande, Rio Grande, Rio Grande do Sul, Brazil
| | - Abelardo O S Júnior
- Physical Therapy Division, Anhanguera College of Pelotas, Pelotas, Rio Grande do Sul, Brazil
| | - Luis U Signori
- Department of Physical Therapy and Rehabilitation, Federal University of Santa Maria, Santa Maria, Rio Grande do Sul, Brazil
| | - Silvio O M Prietsch
- Pediatric Pulmonology Division, Postgraduate Program in Health Sciences and Postgraduate Program in Public Health, Faculty of Medicine, Federal University of Rio Grande, Rio Grande, Rio Grande do Sul, Brazil
| | - Linjie Zhang
- Pediatric Pulmonology Division, Postgraduate Program in Health Sciences and Postgraduate Program in Public Health, Faculty of Medicine, Federal University of Rio Grande, Rio Grande, Rio Grande do Sul, Brazil
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Dang V, Medina B, Das D, Moghadam S, Martin KJ, Lin B, Naik P, Patel D, Nosheny R, Wesson Ashford J, Salehi A. Formoterol, a long-acting β2 adrenergic agonist, improves cognitive function and promotes dendritic complexity in a mouse model of Down syndrome. Biol Psychiatry 2014; 75:179-88. [PMID: 23827853 DOI: 10.1016/j.biopsych.2013.05.024] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/26/2013] [Revised: 05/17/2013] [Accepted: 05/17/2013] [Indexed: 12/21/2022]
Abstract
BACKGROUND Down syndrome is associated with significant failure in cognitive function. Our previous investigation revealed age-dependent degeneration of locus coeruleus, a major player in contextual learning, in the Ts65Dn mouse model of Down syndrome. We studied whether drugs already available for use in humans can be used to improve cognitive function in these mice. METHODS We studied the status of β adrenergic signaling in the dentate gyrus of the Ts65Dn mouse model of Down syndrome. Furthermore, we used fear conditioning to study learning and memory in these mice. Postmortem analyses included the analysis of synaptic density, dendritic arborization, and neurogenesis. RESULTS We found significant atrophy of dentate gyrus and failure of β adrenergic signaling in the hippocampus of Ts65Dn mice. Our behavioral analyses revealed that formoterol, a long-acting β2 adrenergic receptor agonist, caused significant improvement in the cognitive function in Ts65Dn mice. Postmortem analyses revealed that the use of formoterol was associated with a significant improvement in the synaptic density and increased complexity of newly born dentate granule neurons in the hippocampus of Ts65Dn mice. CONCLUSIONS Our data suggest that targeting β2 adrenergic receptors is an effective strategy for restoring synaptic plasticity and cognitive function in these mice. Considering its widespread use in humans and positive effects on cognition in Ts65Dn mice, formoterol or similar β2 adrenergic receptor agonists with ability to cross the blood brain barrier might be attractive candidates for clinical trials to improve cognitive function in individuals with Down syndrome.
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Affiliation(s)
- Van Dang
- Department of Psychiatry and Behavioral Sciences (VD, JWA, AS); Veterans Administration Palo Alto Health Care System (VD, BM, DD, SM, KJM, BL, PN, DP, JWA, AS), Palo Alto, California
| | - Brian Medina
- Veterans Administration Palo Alto Health Care System (VD, BM, DD, SM, KJM, BL, PN, DP, JWA, AS), Palo Alto, California
| | - Devsmita Das
- Veterans Administration Palo Alto Health Care System (VD, BM, DD, SM, KJM, BL, PN, DP, JWA, AS), Palo Alto, California
| | - Sarah Moghadam
- Veterans Administration Palo Alto Health Care System (VD, BM, DD, SM, KJM, BL, PN, DP, JWA, AS), Palo Alto, California
| | - Kara J Martin
- Veterans Administration Palo Alto Health Care System (VD, BM, DD, SM, KJM, BL, PN, DP, JWA, AS), Palo Alto, California
| | - Bill Lin
- Veterans Administration Palo Alto Health Care System (VD, BM, DD, SM, KJM, BL, PN, DP, JWA, AS), Palo Alto, California
| | - Priyanka Naik
- Veterans Administration Palo Alto Health Care System (VD, BM, DD, SM, KJM, BL, PN, DP, JWA, AS), Palo Alto, California
| | - Devan Patel
- Veterans Administration Palo Alto Health Care System (VD, BM, DD, SM, KJM, BL, PN, DP, JWA, AS), Palo Alto, California
| | - Rachel Nosheny
- Department of Molecular and Cellular Physiology (RN), Stanford University School of Medicine, Stanford
| | - John Wesson Ashford
- Department of Psychiatry and Behavioral Sciences (VD, JWA, AS); Veterans Administration Palo Alto Health Care System (VD, BM, DD, SM, KJM, BL, PN, DP, JWA, AS), Palo Alto, California
| | - Ahmad Salehi
- Department of Psychiatry and Behavioral Sciences (VD, JWA, AS); Veterans Administration Palo Alto Health Care System (VD, BM, DD, SM, KJM, BL, PN, DP, JWA, AS), Palo Alto, California.
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