Characterizing the function and origin of kidney capsule macrophages
Bibliographic record
Abstract
Macrophages are a type of innate immune cell that have roles in pathogen detection, homeostasis, tissue development, and inflammation. These cells can be localized to tissues and self-renewing, or recruited from the bone marrow via a monocyte intermediate. Three main subsets of tissue resident macrophages were previously described with conserved ontogeny and self-renewal capacity across tissues. These subsets include TLF+ (TIMD4+ LYVE1+FOLR2+), MHCIIhi, and CCR2+. The kidney parenchyma is notably lacking the TLF+ macrophages that are present in all other tissues and constitute a yolk-sac derived subset, capable of self-renewal and contributing to wound repair. The kidney capsule is a fibrous tissue that encapsulates the kidney parenchyma, that remains vastly understudied. It was recently shown that the kidney capsule contains TLF+ macrophages, however the function and origin of this population within the capsule remains unknown. Here, with flow cytometry and immunofluorescence staining, we further cement this population as a discrete population independent of kidney parenchymal macrophages. We characterize the self-renewal capacity of kidney capsule macrophages, describe a specific role for fibroblast-derived macrophage colony stimulating factor (mCSF) in the survival of capsule (and not parenchyma) macrophages; and show that they are heavily localized in clusters throughout the capsule based on their origin. Future work will explore the functional role of these cells in the context of acute kidney injury.
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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 | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.001 |
| 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 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".