Mesenchymal Stromal Cells Accelerate Hematopoietic Reconstitution and Mediate An IL6-Dependent Regeneration of the Intestinal Epithelium of Lethally Irradiated Mice.
Bibliographic record
Abstract
Abstract Abstract 3846 Apoptosis of radiation-sensitive stem cells in the bone marrow and the gut are the main complications arising from radiation exposure, whether therapeutic or accidental. Bone marrow-derived mesenchymal stromal cells (MSC) were shown to exert regenerative properties through the secretion of factors which act in a paracrine manner. In this study, we demonstrated that a single intra-peritoneal injection of C57Bl/6 MSC rescued lethally irradiated Balb/c mice. Histological analysis and Ki67 immunostaining of jejunum sections collected 48 hours and 5 days post MSC injection indicated that MSC protected the gastro-intestinal epithelium from severe radiation-induced damages and prompted the regeneration of the gut by stimulating proliferation of the crypt stem cell pool. Using interleukin-6 null MSC, we demonstrated that IL-6 derived from the MSC played a role accelerating gastro-intestinal epithelium regeneration. We also observed that MSC injection prevented severe anemia and restored granulocyte and platelet counts to normal values faster than the control group. Accelerated regeneration of the bone marrow and extra-medullar hematopoiesis in the spleen of MSC transplanted mice corroborated this observation. Our results suggest that IL-6 derived from MSC or used on its own may be exploited to alleviate radiation induced injuries to patients undergoing radiotherapy or subject to accidental radiation exposure Disclosures: No relevant conflicts of interest to declare.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 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) | 0.002 | 0.001 |
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 source (direct Gemma or distilled Codex), 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".