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© Research
Publication : Journal of neurotrauma

Minocycline restores olfactory bulb volume and olfactory behavior after traumatic brain injury in mice

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Journal of neurotrauma - 07 Nov 2011

Siopi E, Calabria S, Plotkine M, Marchand-Leroux C, Jafarian-Tehrani M

Link to Pubmed [PMID] – 21910642

J. Neurotrauma 2012 Jan;29(2):354-61

Permanent olfactory dysfunction can often arise after traumatic brain injury (TBI) and while one of the main causes is the immediate loss of neurons in the olfactory bulb (OB), the emergent neuroinflammatory environment following TBI may further promote OB deterioration. Therefore, we examined the effects of acute anti-inflammatory treatment with minocycline on post-TBI olfactory behavior and on OB surface. The mouse model of closed-head injury by mechanical percussion was applied to anesthetized Swiss mice. The treatment protocol included three injections of minocycline (i.p.) at 5 min (90 mg/kg), 3 h, and 9 h (45 mg/kg) post-TBI. An olfactory avoidance test was run up to 12 weeks post-TBI. The mice were then sacrificed and their OB surface was measured. Our results demonstrated a post-TBI olfactory behavior deficit that was significant up to at least 12 weeks post-TBI. Additionally, substantial post-TBI OB atrophy was observed that was strongly correlated with the behavioral impairment. Minocycline was able to attenuate both the olfactory lesions and corresponding functional deficit in the short and long term. These results emphasize the potential role of minocycline as a promising neuroprotective agent for the treatment of TBI-related olfactory bulb lesions and deficits.

http://www.ncbi.nlm.nih.gov/pubmed/21910642