237-OR: Gastrin Improves Single Islet Transplant Outcomes
Bibliographic record
Abstract
Background: Multiple allogenic islet transplants (ITs) are usually required to supply adequate islet mass (~10,000 IEQ/kg) to induce insulin independence. Improving outcomes of a SINGLE islet transplant are needed. Gastrin is a gut hormone that is involved in normal fetal pancreas development. Evidence by our group and others have shown gastrin can support islet cell expansion/function and have anti-inflammatory and pro-angiogenesis effects. We compared outcomes of IT alone across 3 clinical trials using: Edmonton-based (ITA), T-cell depleting (TCD), and TCD immunosuppression with an investigational gastrin analogue (GAS). Methods: Between 2004-2022, a total of 31 evaluable T1D patients without a prior history of transplant received IT-alone under the ITA (n=17), TCD (n=7), and GAS (n=7) clinical trials. Participants in ITA and TCD were eligible to receive up to 3 ITs each. GAS participants received only a single IT and two 30-day courses of gastrin (SQ, BID) at the time of IT and again 6 months later. Immunosuppression included basiliximab or daclizumab + etanercept (ITA) and T-cell depletion (anti-thymoglobulin) + etanercept + anakinra (TCD and GAS). Results: Progressive improvements in engraftment were observed in the ITA, TCD, and GAS trials. Average insulin requirements were reduced by 18, 26, and 33 u/day. GAS subjects showed the most rapid reduction of 30.9 u/day (94%) in the first 2 weeks post-IT, compared to 17.5 u/day (67%) in TCD. Rates of subjects achieving insulin independence with a SINGLE islet transplant were 0, 15, and 57%. Subjects required an average of 3 ITs in ITA, 2 in TCD, and only one IT in GAS to achieve insulin independence. Average numbers of islets required to achieve insulin independence were 13,280, 8,433 and 4,837 IEQ/kg. Conclusion: Gastrin use in the peri-transplant period leads to rapid engraftment, larger magnitude of insulin reduction, and permitted achievement of insulin independence in more than half of subjects after a single islet transplant of less than half the normally targeted islet dose. Disclosure J.Hacker-stratton: None. C.Orr: None. K.Omori: None. M.Qi: None. E.Forouhar: None. M.El-shahawy: None. F.R.Kandeel: None. Funding National Institutes of Health (U24DK098085)
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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 | 0.001 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.007 | 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".