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Methylmercury increases S100B content in rat cerebrospinal fluid.
M Farina1, V Cereser, L V Portela
1Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Ramiro Barcelos, 2600 Anexo, CEP 90035 003, Porto Alegre, RS, Brazil; Departamento de Bioquímica, Centro de Ciências Biológicas, Universidade Federal de Santa Catarina, 88040 900, Florianópolis, SC, Brazil.
Methylmercury exposure in rats increased S100B protein levels in cerebrospinal fluid (CSF), indicating potential brain damage. Behavioral tests also suggested neurological impairment in exposed animals.
Area of Science:
- Neuroscience
- Toxicology
- Biochemistry
Background:
- S100B protein, released by astrocytes, serves as a peripheral marker for brain damage.
- Methylmercury (MeHg) is an environmental neurotoxicant with known adverse effects on the nervous system.
Purpose of the Study:
- To investigate the impact of methylmercury chloride exposure on S100B protein levels in rat cerebrospinal fluid (CSF).
- To explore the correlation between altered CSF S100B levels and neurological injury indicators.
Main Methods:
- Adult rats received subcutaneous injections of methylmercury chloride (5 mg/kg).
- Serum mercury levels and CSF S100B protein content were measured.
- Open field tests were conducted to assess animal behavior (crossings and rearings).
Main Results:
- Methylmercury treatment significantly elevated serum mercury and CSF S100B protein levels.
- MeHg-exposed rats exhibited reduced locomotion and rearing behavior compared to controls.
- These findings suggest a link between MeHg exposure, increased CSF S100B, and neurological impairment.
Conclusions:
- This study demonstrates, for the first time, elevated S100B levels in CSF following exposure to a neurotoxic metal.
- The results suggest that astrocytes may be involved in methylmercury-induced neurotoxicity.
- Increased S100B in CSF could serve as a biomarker for methylmercury-induced brain injury.
