Association of serum microcystin levels with neurobehavior of school-age children in rural area of Southwest China: A cross-sectional study.
Ecotoxicol Environ Saf
; 212: 111990, 2021 Apr 01.
Article
em En
| MEDLINE
| ID: mdl-33524912
ABSTRACT
To investigate whether microcystin-LR (MC-LR) influences children's cognitive function and memory ability, we measured serum MC-LR and whole blood lead levels in 697 primary students, and collected their academic and neurobehavioral test scores. The median of serum MC-LR levels was 0.80 µg/L (the value below the limit of detection to 1.67 µg/L). The shapes of the associations of serum MC-LR levels (cut-point 0.95 µg/L) with scores on academic achievements, digit symbol substitution test and long-term memory test were parabolic curves. Logistic regression analysis showed that MC-LR at concentrations of 0.80-0.95 µg/L was associated with the increased probability of higher achievements on academic achievements [odds ratio (OR) = 2.20, 95% confidence interval (CI) 1.28-3.79], and also with scores on digit symbol substitution test (OR = 1.73, 95% CI 1.05-2.86), overall memory quotient (OR = 2.27, 95% CI 1.21-4.26), long-term memory (OR = 1.85, 95% CI 1.01-3.38) and short-term memory (OR = 2.13, 95% CI 1.14-3.98) after adjustment for confounding factors. Antagonism of MC-LR and lead on long-term memory was observed (synergism index = 0.15, 95% CI 0.03-0.74). In conclusion, serum MC-LR at concentrations of 0.80-0.95 µg/L was positively associated with higher scores on cognitive and neurobehavioral tests, and antagonism between MC-LR at concentrations of 0.80-1.67 µg/L and lead exposure was obviously observed on long-term memory in children. Concerning that MC-LR is a neurotoxin at high doses, our observation is interesting and need further investigation.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Poluentes Químicos da Água
/
Exposição Ambiental
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Microcistinas
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Toxinas Marinhas
Tipo de estudo:
Observational_studies
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Prevalence_studies
/
Risk_factors_studies
Limite:
Child
/
Humans
País/Região como assunto:
Asia
Idioma:
En
Revista:
Ecotoxicol Environ Saf
Ano de publicação:
2021
Tipo de documento:
Article
País de afiliação:
China