Early exposure to agricultural pesticides and the occurrence of autism spectrum disorder: a systematic review / Exposição precoce a agrotóxicos de uso agrícola e ocorrência do transtorno do espectro autista: uma revisão sistemática

Abstract Objective: The aim of this study was to evaluate the influence of early exposure to agricultural pesticides and their relationship with autism spectrum disorder. Data source: This systematic review was registered at PROSPERO as CRD42020204842. The subject was systematically analyzed on PubMed, Scopus, and Web of Science databases until April 2021. Only studies with humans with early exposure to agricultural pesticides and diagnosis of autism were included. Exclusion criteria were studies on pesticides for domestic or veterinary use and late exposure. There were no language and time restriction. The quality analysis of the studies used the Newcastle-Ottawa Scale. Data synthesis: Six case-control studies were included; three of them measured the route of exposure by maternal biomarkers and the others by the residence address. The studies had scores between moderate and high in the quality assessment tool. It was found high rates of association between early exposure to agricultural pesticides and autism and detection limit above the quantification for a sample of polychlorinated biphenyls, hexachlorobenzene, and dichlorodiphenyldichloroethylene. Conclusions: There is evidence concerning the exposure to agricultural pesticides in early life and the development of the autism spectrum disorder; however, more studies are required to better understand their possible association.

RESUMO Objetivo: Compreender a influência da exposição precoce a agrotóxicos de uso agrícola e sua relação com o transtorno do espectro autista. Fontes de dados: Esta revisão sistemática foi registrada no banco de dados PROSPERO sob número CRD42020204842. Por meio das bases de dados PubMed, Scopus e Web of Science, o assunto foi analisado sistematicamente até abril de 2021. Foram incluídos somente estudos com humanos, sendo critérios de inclusão a exposição precoce a agrotóxicos de uso agrícola e o diagnóstico de autismo e critérios de exclusão agrotóxicos de uso doméstico ou veterinário e exposição tardia. Todos os estudos foram analisados sem restrição de linguagem e tempo. A qualidade dos estudos foi avaliada pela NewCastle Ottawa Scale. Síntese dos dados: No total, seis estudos caso-controle foram incluídos. Três deles mensuraram a exposição pelos biomarcadores maternos e os demais (50%) pelo endereço de moradia. Os trabalhos apresentaram qualidade entre moderada e alta. Encontrou-se alta taxa de associação entre a exposição precoce à agrotóxicos e o autismo e detecção acima do limite de quantificação para amostras de bifenilas policloradas, hexaclorobenzeno e diclorodifenildicloroetileno. Conclusões: Existem evidências sobre a exposição a agrotóxicos de uso agrícola precocemente e o desenvolvimento do transtorno do espectro autista, porém mais pesquisas são necessárias para melhor compreensão da associação.

Early exposure to agricultural pesticides and the occurrence of autism spectrum disorder: a systematic review.

OBJECTIVE: The aim of this study was to evaluate the influence of early exposure to agricultural pesticides and their relationship with autism spectrum disorder. DATA SOURCE: This systematic review was registered at PROSPERO as CRD42020204842. The subject was systematically analyzed on PubMed, Scopus, and Web of Science databases until April 2021. Only studies with humans with early exposure to agricultural pesticides and diagnosis of autism were included. Exclusion criteria were studies on pesticides for domestic or veterinary use and late exposure. There were no language and time restriction. The quality analysis of the studies used the Newcastle-Ottawa Scale. DATA SYNTHESIS: Six case-control studies were included; three of them measured the route of exposure by maternal biomarkers and the others by the residence address. The studies had scores between moderate and high in the quality assessment tool. It was found high rates of association between early exposure to agricultural pesticides and autism and detection limit above the quantification for a sample of polychlorinated biphenyls, hexachlorobenzene, and dichlorodiphenyldichloroethylene. CONCLUSIONS: There is evidence concerning the exposure to agricultural pesticides in early life and the development of the autism spectrum disorder; however, more studies are required to better understand their possible association.

Benefits of turmeric supplementation for skin health in chronic diseases: a systematic review.

The skin is a physical barrier that protects the body from the external environment. Through its immune system, it limits the attack of environmental threats. Unregulated immune reactions, however, can cause chronic inflammatory skin diseases, requiring that effective treatment routes be sought. Turmeric, a root originated from Southeast Asia, has a number of therapeutic benefits, including anti-inflammatory activity. The aim of this review was to evaluate the effects of turmeric oral supplementation in the treatment of chronic inflammatory skin diseases. Through PubMed, Scopus, and Web of Science databases, clinical studies examining the relationship between turmeric, curcumin, and skin health in humans until September 2019 were systematically searched. Evidence analysis were performed using robust tools to evaluate the risk of bias (RoB 2.0), (ROBINS-I) and methodological quality (GRADE) of the included studies. A total of eleven studies were included. The skin conditions examined include psoriasis, pruritus, oral lichen planus, facial redness, as well as types of skin cancers. Overall, therapeutic benefits for skin health have been observed through oral turmeric supplementation. The current published studies, nevertheless, are limited, requiring continuity and improvement in the intervention methodology employed.