Abstract
Our previous studies suggested that the expression of TrkB and BDNF decreased concomitantly in brain during Streptococcus pneumoniae meningitis after antibiotic treatment, and that adjuvant administration of exogenous BDNF could rescue neurons from S. pneumoniae meningitis. In this study, we investigated the responsiveness of TrkB to exogenous BDNF treatment in frontal cortex during antibiotic treatment of S. pneumoniae meningitis. We found that adjuvant administration of exogenous BDNF led to increased number of survived neurons, improved the conduction of central auditory pathway and neurological disfunction, and up-regulated TrkB expression at the mRNA level in the frontal cortex of rats under S. pneumonia meningitis (P < 0.01). When treated with placebo, on the contrary, neurons in the frontal cortex of control rats were seriously damaged and the TrkB expression was remarkably decreased. These findings indicated that exogenous BDNF could up-regulate TrkB expression and thus played a neuroprotective role in frontal cortex injury from S. pneumoniae meningitis. They further confirmed our previous report that the decrease of intrinsic BDNF and TrkB expression is involved in the pathogenesis of neurological brain damage during S. pneumoniae meningitis after antibiotic treatment.
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We would like to thank the support from National Natural Science Foundation of China (Nos. 81171630; 81271337).
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X. Song and D. Lian contributed equally as the co-first authors.
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Song, X., lian, D., He, D. et al. The responsiveness of TrkB to exogenous BDNF in frontal cortex during antibiotic treatment of Streptococcus pneumoniae meningitis. Neurol Sci 35, 1915–1923 (2014). https://doi.org/10.1007/s10072-014-1862-x
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DOI: https://doi.org/10.1007/s10072-014-1862-x