Developmental lineage of cell types in cortical dysplasia with balloon cells
Why this work is in the frame
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Bibliographic record
Abstract
Focal cortical dysplasia type IIB with Ballon cells is a developmental malformation of the cerebral cortex highly associated with epilepsy. As a strategy to define the embryonic origin and neurochemical phenotype of cells in this disease, we probed specimens (n = 10) resected during epilepsy surgery with a panel of 13 antibodies recognizing proteins associated with (i) specific progenitor cell types including brain lipid binding protein (BLBP), collapsin response mediator protein 4 (CRMP4), Dlx1, Dlx2, GFAPdelta, MASH1, Otx1, Pax6, vimentin and phosphorylated vimentin and (ii) excitatory or inhibitory neurochemical phenotypes such as the vesicular glutamate transporters-1 and 2 (VGLUT-1, VGLUT-2), or the vesicular GABA transporter (VGAT). Balloon cells and large dysplastic neurons in all specimens expressed Otx1, phospho-vimentin, Pax6 and BLBP, proteins normally expressed by cells in the embryonic ventricular zone. A subpopulation of balloon cells expressed MASH-1 also expressed in the ventricular zone. Most balloon cells and dysplastic neurons were VGLUT2 immunoreactive, whereas none expressed Dlx1 or Dlx2, markers for inhibitory cells derived from the medial ganglionic eminence and few expressed VGAT, found in GABAergic interneurons. Otx1 mRNA expression and Dlx1 mRNA absence was confirmed by single cell RT-PCR. A subpopulation of balloon cells was labelled with CRMP4 and GFAPdelta, markers specific for newly generated cells derived from the adult subventricular zone. Detection of Otx1, phospho-vimentin, Pax6 and BLBP expression but absence of Dlx1/Dlx2 expression suggests that balloon cells and dysplastic neurons derive from radial glial cells in the telencephalic ventricular zone and not the medial ganglionic eminence. VGLUT expression argues that dysplastic neurons may be glutamatergic. CRMP-4 and GFAPdelta expression suggests that new cells may arrive in focal cortical dysplasia, perhaps deriving in part from the subventricular zone. These findings provide a developmental lineage model in which balloon cells and dysplastic neurons are derived from radial glial progenitor cells.
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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) | 0.000 | 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 | 0.000 |
| 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