Axonal Regeneration and Neuroinflammation: Roles for the Translocator Protein 18 kDa
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Bibliographic record
Abstract
After a traumatic injury of the nervous system or in the course of a neurodegenerative disease, the speed of axonal regeneration and the control of the inflammatory response are fundamental parameters of functional recovery. Spontaneous regeneration takes place in the peripheral nervous system, although the process is slow and often incomplete. There is currently no efficient treatment for enhancing axonal regeneration, including elongation speed and functional reinnervation. Ligands of the translocator protein 18 kDa (TSPO) are currently under investigation as therapeutic means for promoting neuroprotection, accelerating axonal regeneration and modulating inflammation. The mechanisms of action of TSPO ligands involve the regulation of mitochondrial activity and the stimulation of steroid biosynthesis. In the peripheral nervous system, TSPO expression is strongly up-regulated after injury, primarily in Schwann cells and macrophages, but also in neurones. Its levels return to low control values when nerve regeneration is completed, strongly supporting an important role in regenerative processes. We have demonstrated a role for the benzoxazine etifoxine in promoting axonal regeneration in the lesioned rat sciatic nerve, either after freeze-injury or complete transection. Etifoxine is already clinically approved for the treatment of anxiety disorders (Stresam(®) , Biocodex, Gentilly, France). Daily treatment with etifoxine resulted in a two-fold acceleration in axonal regeneration, as well as in a marked improvement of both the speed and quality of functional recovery. The neuroregenerative effects of etifoxine are likely to be mediated by TSPO, and they may involve an increased synthesis of pregnenolone and its metabolites, such as progesterone. After freeze-injury of the sciatic nerve, administration of etifoxine also strongly reduced the number of activated macrophages and decreased the production of the inflammatory cytokines tumour necrosis factor-α and interleukin-1β. Thus, this drug offers promise for the treatment of peripheral nerve injuries and axonal neuropathies. It may also be used as a lead compound in the development of new TSPO-based neuroprotective approaches.
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it