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Muñoz-Rocha TV, Tamayo Y Ortiz M, Romero M, Pantic I, Schnaas L, Bellinger D, Claus-Henn B, Wright R, Wright RO, Téllez-Rojo MM. Prenatal co-exposure to manganese and depression and 24-months neurodevelopment. Neurotoxicology 2017; 64:134-141. [PMID: 28728787 DOI: 10.1016/j.neuro.2017.07.007] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Revised: 07/12/2017] [Accepted: 07/12/2017] [Indexed: 10/19/2022]
Abstract
BACKGROUND Normal prenatal neurodevelopment follows stages that are potentially influenced by both chemical and psychosocial environments. Exposure to elevated manganese during this critically vulnerable period has been found to be neurotoxic. Independently, maternal prenatal depression has been associated with subsequent neurodevelopmental decrements in children. The association between child neurodevelopment and prenatal co-exposure to manganese and maternal depression has not been sufficiently studied. METHODS During pregnancy and at birth, we measured maternal blood and cord blood manganese levels respectively. Maternal depression was assessed in the 3rd trimester of pregnancy using the Edinburgh Depression Scale. Neurodevelopment was evaluated at 24 months of age with the Bayley Scales of Infant Development. A multivariate multiple regression model was used to analyze cognitive, language and motor scores simultaneously for 473 children from the PROGRESS birth cohort in Mexico City. RESULTS Over 25% of our study participants reported having depressive symptoms. 3rd trimester blood manganese as well as depressive symptoms were independently negatively associated with all neurodevelopment scores in adjusted models. In stratified analyses, the negative association between manganese (maternal as well as cord blood) and 24-month language scores was stronger among women with depressive symptoms. Receptive language was mostly affected. Inverted U-shaped curves were seen for the association between with cord blood manganese and neurodevelopment scores. CONCLUSIONS Our findings are in line with previous studies of manganese and depression neurotoxicity. The prenatal period may be particularly sensitive to manganese and depression co-exposures and should be of interest for public health interventions to promote healthy emotional and nutritional pregnancies.
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Affiliation(s)
- Teresa Verenice Muñoz-Rocha
- National Institute of Public Health, Universidad No. 655 Colonia Santa María, Ahuacatitlán, Cerrada Los Pinos y Caminera, C.P. 62100, Cuernavaca, Morelos, Mexico.
| | - Marcela Tamayo Y Ortiz
- National Institute of Public Health, Universidad No. 655 Colonia Santa María, Ahuacatitlán, Cerrada Los Pinos y Caminera, C.P. 62100, Cuernavaca, Morelos, Mexico; CONACYT- National Council of Science and Technology, Avenida Insurgentes Sur 1582, D.F., Benito Juárez, Crédito Constructor, 03940, Ciudad de, Mexico.
| | - Martín Romero
- National Institute of Public Health, Universidad No. 655 Colonia Santa María, Ahuacatitlán, Cerrada Los Pinos y Caminera, C.P. 62100, Cuernavaca, Morelos, Mexico.
| | - Ivan Pantic
- National Institute of Perinatology, Calle Montes Urales #800, D.F., Miguel Hidalgo, Lomas Virreyes, 11000 Ciudad de, Mexico.
| | - Lourdes Schnaas
- National Institute of Perinatology, Calle Montes Urales #800, D.F., Miguel Hidalgo, Lomas Virreyes, 11000 Ciudad de, Mexico.
| | - David Bellinger
- Department Environmental Health, Harvard T.H. Chan School of Public Health, 677 Huntington Ave, Boston, MA 02115, United States,.
| | - Birgit Claus-Henn
- Department of Environmental Health, Boston University School of Public Health, 715 Albany Street, Boston, MA 02118, United States,.
| | - Rosalind Wright
- Department of Pediatrics, Icahn School of Medicine at Mount Sinai, 1428 Madison Ave, New York, NY 10029, United States.
| | - Robert O Wright
- Department of Preventive Medicine, Icahn School of Medicine at Mount Sinai, 1428 Madison Ave, New York, NY 10029, United States.
| | - Martha María Téllez-Rojo
- National Institute of Public Health, Universidad No. 655 Colonia Santa María, Ahuacatitlán, Cerrada Los Pinos y Caminera, C.P. 62100, Cuernavaca, Morelos, Mexico.
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