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Luchtvervuiling zwangerschap
en zwangerschap Wilfried Gyselaers
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Environ Health Perspect. 2005 Apr;113(4):375-82.
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Genk Zuid 200 jongeren versus Vlaamse controle-groep
Genk > Vl (p>0.05) Cadmium Lood Arseen Chroom Thallium Koper Hydroxypyreen Vlaams Humaan Biomonitoring-programma Vlaamse Overheid, dienst Milieu & Gezondheid
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Study: What is effect of
in utero exposure to particulate air pollution on mtDNA + genome of placental tissue or cord blood
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Studie 1
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Hoeveelheid mtDNA ~ metabole activiteit vh weefsel
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? (n Mitochondria ↑)
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Methods
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PM10 values: Krigin interpolation method
Measuring stations interpolate air pollution levels to grids Validated model* * Janssen S et al Spatial interpolation of air pollution measurements using CORINE land cover data. Atmospheric Environment 42:
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2. Exposure measurements
Distance to major roads (N-E road) Lifestyle factors: Questionnaire (e.g. smoking, diet, …)
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mtDNA-content = mtDNA/nDNA
3. Measuring mitochondrial DNA-content in different matrices DNA extraction Real-time PCR mtDNA-content = mtDNA/nDNA
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Results Linear regression analysis
No association with umbilical cord blood
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Multiple regression analysis
Distance to major road is a surrogate for traffic related air pollution* * Hoek G et al Association between mortality and indicators of traffic-related air pollution in the Netherlands: a cohort study. Lancet 360:
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BIO-ENERGETIC DECLINE
Mitochondrial DNA content Environmental components (PM, toxic metals) Mitochondrion ETC ROS ROS ENERGY COMPENSATION mtDNAcn Mitochondrial abundance ROS Mitochondrial dysregulation mtDNA mutation Feedback mechanism Lack of histones Insufficient DNA repair BIO-ENERGETIC DECLINE mtDNAcn Mitochondrial abundance
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Epigenetische gen-modulatie
Studie 2 DNA-methylatie Epigenetische gen-modulatie
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Voorbeeld: maagkanker
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Results
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Besluit (1) Effecten van fijn stof vervuiling op placenta-DNA
Mitochondriaal DNA daalt Hypo-methylatie genoom DNA-effecten treden op tijdens het ganse verloop van de zwangerschap
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Besluit (2) Klinische effecten:
Verlaagde foetale groei en toename IUGR, meest uitgesproken bij geboorte tussen 32 – 36w Lange termijn gezondheid als neonaat opgroeit tot kind of volwassene ?
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Verdere studies BIRTH 2 year 5-7 year Adolescent ??? Polymorphisms
Gene expression Arterial stiffness Asthma, wheezing … BIRTH 2 year 5-7 year Adolescent ???
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Dank U !
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