Glia Regulate the Timing of Photoreceptor Differentiation in the <i>Drosophila</i> Visual System
Bibliographic record
Abstract
Recent studies suggest the involvement of insulin signaling in the timing of photoreceptor differentiation in Drosophila and mammals. The molecular and cellular mechanisms underlying temporal control of photoreceptor differentiation by insulin signaling, however, remain largely undefined. In this study, we reveal a key role for sub-retinal glia in timing the differentiation of photoreceptor neurons (R cells) in the developing Drosophila eye imaginal disc. Decreasing the signaling of epidermal growth factor receptor (EGFR) in sub-retinal glia delayed R-cell differentiation. In contrast, hyperactivating the EGFR pathway in sub-retinal glia caused the precocious R-cell differentiation. Cell-type-specific knockdown, epistasis analysis, and transgene rescue indicate that insulin-like peptides ILP3 and ILP6 are key downstream targets of the EGFR pathway in sub-retinal glia. We propose that the activation of the EGFR pathway in sub-retinal glia stimulates the release of ILP3 and ILP6, which in turn activate the insulin receptor (InR) in eye precursor cells to positively regulate the timing of photoreceptor differentiation.
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How this classification was reachedexpand
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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".