Using MUC2 mucin producing tumorigenic human goblet-like cells to uncover functional properties of the mucus barrier
Bibliographic record
Abstract
Goblet cells are the guardians that produce MUC2 mucin that forms the protective mucus barrier as the first line of innate host defense against pathogen invasion while sustaining a healthy gut microbiota. Using an unbiased screen, we cloned a high LS174T colonic adenocarcinoma MUC2 mucin-producing goblet-like cell that revealed by whole genome sequencing, mutations that upregulated the expression of tumor suppressor TP53, anterior gradient 2 (AGR2) and mitogen-activated protein kinase kinases (MEK and MAPK) genes that enhanced MUC2 biosynthesis and secretion. Hypersecretory mutant (Mut) cells exhibited a phenotype characterized by high constitutive MUC2 mRNA, upregulation of glycosyltransferases, and hypersecretion of sialylated and fucosylated MUC2 mucus enumerated by glycomics analysis. Mut secreted mucus was altered quantified by increased permeability to fluorescence microsphere (0.2 μm and 1 μm) beads and to Salmonella enterica adherence, invasion, and cell death as compared to WT controls. Shotgun proteomic analysis revealed that Mut cells were upregulated in metabolic pathways for oxidative stress, HIF pathways and growth factors that enhanced wound healing, and tumorigenesis. These results highlight the importance of regulatory genes for proper mucus production in providing barrier function and homeostasis in the gastrointestinal tract that is markedly affected by metabolic stress and glycosylation prevalent in colonic carcinomas.
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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".