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Paternal exposure to excessive methionine altered behavior and neurochemical activities in zebrafish offspring

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Abstract

An increase in plasma l-methionine (Met) levels, even if transitory, can cause important toxicological alterations in the affected individuals. Met is essential in the regulation of epigenetic mechanisms and its influence on the subsequent generation has been investigated. However, few studies have explored the influence of a temporary increase in Met levels in parents on their offspring. This study evaluated the behavioral and neurochemical effects of parental exposure to high Met concentration (3 mM) in zebrafish offspring. Adult zebrafish were exposed to Met for 7 days, maintained for additional 7 days in tanks that contained only water, and then used for breeding. The offspring obtained from these fish (F1) were tested in this study. During the early stages of offspring development, morphology, heart rate, survival, locomotion, and anxiety-like behavior were assessed. When these animals reached the adult stage, locomotion, anxiety, aggression, social interaction, memory, oxidative stress, and levels of amino acids and neurotransmitters were analyzed. F1 larvae Met group presented an increase in the distance and mean speed when compared to the control group. F1 adult Met group showed decreased anxiety-like behavior and locomotion. An increase in reactive oxygen species was also observed in the F1 adult Met group whereas lipid peroxidation and antioxidant enzymes did not change when compared to the control group. Dopamine, serotonin, glutamate, and glutathione levels were increased in the F1 adult Met group. Taken together, our data show that even a transient increase in Met in parents can cause behavioral and neurochemical changes in the offspring, promoting transgenerational effects.

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Funding

This study was funded in part by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior—Brasil (CAPES)—finance code 001, Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) (Proc. 420695/2018-4), Fundação de Amparo à Pesquisa do Estado do Rio Grande do Sul (Proc. 17/2551-0000977-0), and Instituto Nacional de Ciências e Tecnologia para Doenças Cerebrais, Excitotoxicidade e Neuroproteção. R.Z (133202/2018-6) and C.D.B. (Proc. 304450/2019-7) were the recipients of a fellowship from CNPq.

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Contributions

Conceptualization: RZ, CDB; Data Curation: RZ; Methodology: RZ; Formal analysis and investigation: RZ, MTW, SA, GR, TMdS; Writing—original draft preparation: RZ; Writing—review and editing: RZ; ATSW; CDB; Funding acquisition: CDB; Resources: ATSW, CDB; Supervision: CDB.

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Correspondence to Carla Denise Bonan.

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The authors declare no conflict of interest.

Ethics approval

This study was approved by the Comissão de Ética no Uso de Animais of Pontifícia Universidade Católica do Rio Grande do Sul (3758-CEUA-PUCRS) and was registered in the Sistema Nacional de Gestão do Patrimônio Genético e Conhecimento Tradicional Associado—SISGEN (Protocol No. A3B073D).

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Handling editor: J. G. López.

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Zanandrea, R., Wiprich, M.T., Altenhofen, S. et al. Paternal exposure to excessive methionine altered behavior and neurochemical activities in zebrafish offspring. Amino Acids 53, 1153–1167 (2021). https://doi.org/10.1007/s00726-021-03019-2

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  • DOI: https://doi.org/10.1007/s00726-021-03019-2

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