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| Name | Class |
|---|---|
| ANSES | OTHER |
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PESTIFOL will include children over 8 and under 12 years old of different socioeconomic positions (SEP), mostly living in the region of Pays de la Loire. This approach should enable us to assess the impact of the SEP, and therefore social inequalities, on chemical expositions and DNA damage, and to characterize which (classes/mixture of) pollutants are major source of DNA damage. The study will also address potential effects associated with geographical location on the exposome and its biological consequences.
Growing evidence points to a complex influence of the exposome on health outcomes. Epidemiological studies show associations between pesticides and cognitive delay and cancers. Only few were conducted in children. Chemical exposures differ between socioeconomic groups. The more disadvantaged the group, the higher are some exposures. However, the effect of the exposome on health is complicated to assess due to the long latencies of most diseases. It is therefore important to link social and chemical exposures to 'immediate' outcomes or molecular risk factors for human diseases. There is a strong connection between DNA damage and chronic diseases such as cancers. However, it is difficult to attribute these risks to specific impregnations.
The present study will address the impact of socioeconomic position, hence social inequalities, on environmental exposures and their biological consequences in children. Our approach is to detect DNA damage in hair follicles and associate these measurements with pesticide detections in the hair matrix and socioeconomic position (SEP).
PESTIFOL will include children over 8 and under 12 years old of different socioeconomic positions (SEP), mostly living in the region of Pays de la Loire. This approach should enable us to assess the impact of the SEP, and therefore social inequalities, on chemical expositions and DNA damage, and to characterize which (classes/mixture of) pollutants are major source of DNA damage. The study will also address potential effects associated with geographical location on the exposome and its biological consequences.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| study procedures | Other | Hair cut for DNA damage and chemical exposome variation analysis and Socio-economic characteristics |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Hair cut | Other | Hair locks and follicles will be cut twice in winter and spring |
| |
| Measure | Description | Time Frame |
|---|---|---|
| Describe DNA damage | Hair locks and hair follicles will be collected and will be analysed to evaluate the DNA damage : average amount of DNA break foci per nucleus cross-section | 4-6 months |
| Describe DNA damage | Hair locks and hair follicles will be collected and will be analysed to evaluate the DNA damage: proportion of cells with an abnormal break rate. | 4-6 months |
| Describe socio-economic characteristics. | The socio-economic characteristics will evaluated via parent's questionnaires : parents occupation and education level | 4-6 months |
| Describe socio-economic characteristics. | The socio-economic characteristics will evaluated via parents questionnaires : parents education level | 4-6 months |
| Measure | Description | Time Frame |
|---|---|---|
| Characterize chemical exposome variations | Chemical exposome: presence and amount of pollutant impregnations : total number of polluants detected in hair sample | 4-6 months |
| Characterize chemical exposome variations |
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Inclusion Criteria:
Exclusion Criteria:
- Disorder precluding understanding of trial information or informed assent.
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| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Institut de Cancérologie de l'ouest | Saint-Herblain | 44800 | France |
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Hair collection and parents questionnaires
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| Socio-economic questionnaires |
| Other |
Information about parents education levels and professional occupation, geographic area, children gender, indoor and outdoor children's environmental exposures |
|
Chemical exposome: presence of pollutants/pesticides classified as genotoxic/carcinogenic by the WHO IARC (International Agency for Research on Cancer), and/or the US EPA (National Environmental Protection Agency).
| 4-6 months |
| Characterize socio-economic indicators | The socio-economic characteristics will be evaluated via parents' questionnaires: parents' occupation and education level | 4-6 months |
| Characterize socio-economic indicators, geographical area, seasons | The socio-economic characteristics will be evaluated via parents' questionnaires: geographic area | 4-6 months |
| Characterize socio-economic indicators, geographical area, seasons | The socio-economic characteristics will be evaluated via parents' questionnaires: gender | 4-6 months |
| Characterize socio-economic indicators, geographical area, seasons | The socio-economic characteristics will be evaluated via parents' questionnaires: seasons (winter and spring) | 4-6 months |
| Describe DNA damage | Evaluate the DNA damage: average amount of DNA break foci per nucleus cross-section | 4-6 months |
| Describe DNA damage | Evaluate the DNA damage: proportion of cells with an abnormal break rate. | 4-6 months |