Vegfr3 activation of Pkd2l1+ CSF-cNs triggers the neural stem cell response in spinal cord injury
Why this work is in the frame
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Bibliographic record
Abstract
Activating adult neural stem cells (NSCs) located within the spinal cord niche is considered a promising therapeutic approach for treating spinal cord injury (SCI). Cerebrospinal fluid (CSF)-contacting neurons expressing Pkd2l1 exhibit phenotypic and molecular traits similar to those of adult NSCs. However, the mechanism responsible for regulating the activation of Pkd2l1 + CSF-cNs still needs to be discovered. This research demonstrated that Pkd2l1 + CSF-cNs have a high concentration of vascular endothelial growth factor receptor 3 (Vegfr3) and that SCI results in elevated Vegfr3 levels. The overexpression of Vegfr3 in Pkd2l1 + CSF-cNs induced potential NSC activation. Blocking Vegfr3 led to a significant reduction in the percentage of active Pkd2l1 + CSF-cNs, suggesting that Vegfr3 is involved in controlling the shift from dormancy to activation in these cells. In vivo, the downregulation of Vegfr3 by SAR131475 inhibited Pkd2l1 + CSF-cN proliferation and maintained self-renewal. Injection of vascular endothelial growth factor C (Vegf-C) into the lateral ventricle of adult mice confirmed the involvement of Vegfr3 in activating Pkd2l1 + CSF-cNs. Vegf-C administration significantly increased the number of activated Pkd2l1 + CSF-cNs. Mechanistically, Vegfr3 primed quiescent Pkd2l1 + CSF-cNs for cell cycle reentry by enabling the activation of PI3K/Akt signaling. The activation of Vegfr3 may enhance SCI outcomes by promoting neuronal survival and facilitating the recovery of motor function in mice. Together, our findings highlight that Vegfr3 is a crucial functional regulator of Pkd2l1 + CSF-cNs, governing the transition from NSC quiescence to activation. • Vegfr3 overexpression in Pkd2l1 + CSF-cNs activates neural stem cell potential, promoting neuro-regeneration. • Vegfr3 inhibition by SAR131475 reduces CSF-cN activation and proliferation, highlighting its physiological role. • Vegf-C enhances Vegfr3-mediated Pkd2l1 + CSF-cNs activation, aiding SCI recovery via neuronal survival. • Vegfr3 drives quiescent Pkd2l1 + CSF-cNs into cell cycle via PI3K/Akt, revealing neural stem cell activation mechanisms.
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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 | 0.002 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| 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