Matrilysin (matrix metalloproteinase‐7) expression in ulcerative colitis–related tumorigenesis†
Why this work is in the frame
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Bibliographic record
Abstract
Matrilysin (matrix metalloproteinase-7) plays a part in the initiation and growth of colorectal tumors; expression of this protein has been implicated in tumor invasion and metastasis. To date, matrilysin expression in ulcerative colitis (UC)-associated tumorigenesis has not been studied. The aim of this study was to assess the immunohistochemical expression of matrilysin at different stages of UC-associated neoplasia. Paraffin-embedded specimens from 25 patients with UC without dysplasia, UC-related low-grade dysplasia (LGD) and high-grade dysplasia (HGD), and UC-associated carcinoma as well as four colon biopsy samples with no abnormality were examined using an anti-human matrilysin monoclonal antibody and standard immunoperoxidase techniques. Matrilysin expression was recorded as the number of positive cases and the percentage of positive crypts as follows: normal: none of four; negative results for dysplasia: seven of 12 (< 10%); LGD: nine of 15 (< 10%); HGD: nine of 13 (11-50%); and invasive carcinoma: six of seven (> 50%). The results indicated an apparent switch from focal expression of matrilysin in UC-related low-grade dysplasia to widespread expression in high-grade dysplasia and invasive cancer, mimicking the pattern of expression in sporadic colorectal cancer. Although the sample size is small and further investigation therefore is required, the results suggest the possible role of anti-matrix metalloproteinase therapy in reducing the risk of progression from LGD to cancer in patients with ulcerative colitis. Published 2002 Wiley-Liss, Inc.
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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