Abstract:
BACKGROUND:The autonomic nervous system plays a key role in maintaining homeostasis and responding to external stimuli. In adults, exposure to fine particulate matter ( PM 2.5 ) has been associated with reduced heart rate variability (HRV), an indicator of cardiac autonomic control. OBJECTIVES:Our goal was to investigate the associations of exposure to fine particulate matter ( PM 2.5 ) with HRV as an indicator of cardiac autonomic control during early development. METHODS:We studied 237 maternal-infant pairs in a Boston-based birth cohort. We estimated daily residential PM 2.5 using satellite data in combination with land-use regression predictors. In infants at 6 months of age, we measured parasympathetic nervous system (PNS) activity using continuous electrocardiogram monitoring during the Repeated Still-Face Paradigm, an experimental protocol designed to elicit autonomic reactivity in response to maternal interaction and disengagement. We used multivariable linear regression to examine average PM 2.5 exposure across pregnancy in relation to PNS withdrawal and activation, indexed by changes in respiration-corrected respiratory sinus arrhythmia ( RSA c )-an established metric of HRV that reflects cardiac vagal tone. We examined interactions with infant sex using cross-product terms. RESULTS:In adjusted models we found that a 1-unit increase in PM 2.5 (in micrograms per cubic meter) was associated with a 3.53% decrease in baseline RSA c (95% CI: - 6.96 , 0.02). In models examining RSA c change between episodes, higher PM 2.5 was generally associated with reduced PNS withdrawal during stress and reduced PNS activation during recovery; however, these associations were not statistically significant. We did not observe a significant interaction between PM 2.5 and sex. DISCUSSION:Prenatal exposure to PM 2.5 may disrupt cardiac vagal tone during infancy. Future research is needed to replicate these preliminary findings. https://doi.org/10.1289/EHP4434.
journal_name
Environ Health Perspectjournal_title
Environmental health perspectivesauthors
Cowell WJ,Brunst KJ,Malin AJ,Coull BA,Gennings C,Kloog I,Lipton L,Wright RO,Enlow MB,Wright RJdoi
10.1289/EHP4434subject
Has Abstractpub_date
2019-10-01 00:00:00pages
107007issue
10eissn
0091-6765issn
1552-9924journal_volume
127pub_type
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journal_title:Environmental health perspectives
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更新日期:1993-07-01 00:00:00
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pub_type: 评论,信件
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更新日期:1999-10-01 00:00:00