Development of an Immunoprivileged Site to Prolong Islet Allograft Survival
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Bibliographic record
Abstract
Sertoli cells (SC) play a critical role in the maintenance of the immunoprivileged environment of the testis. We hypothesized that preengrafting SC would allow one to develop a vascularized immunoprivileged ectopic site that provides protection for mouse islet allografts. SC, prepared from 9-day Balb/c mice, were transplanted under the kidney capsule in adult Balb/c mice. After SC engraftment (approximately 30 days), mice were rendered diabetic and subsequently implanted with Balb/c or CBA/J islets directly adjacent to the established SC grafts. Preengrafted SC (5.7 +/- 0.2 x 106) had no adverse effect on syngeneic islet graft function. When allogeneic islets were transplanted into the immunoprivileged ectopic site created by preengrafting 6.4 +/- 0.3 x 10(6) SC, mean graft survival was slightly prolonged (32.4 +/- 6.0 days) compared with control mice that received allogeneic islets alone (16.3 +/- 1.5 days; p = 0.329). In contrast, when 4.8 +/- 0.4 x 10(6) SC were preengrafted, islet allograft survival was significantly prolonged (66.1 +/- 9.8 days; p = 0.001). Four of eight mice, preimplanted with 4.8 +/- 0.4 x 10(6) SC, remained normoglycemic throughout the follow-up period (83.8 +/- 8.6 days) and returned to a diabetic state only when the kidneys bearing the composite grafts were removed. Transplantation of islets into an immunoprivileged ectopic site created by preengrafting SC did not affect islet function and, moreover, provided a means of developing an immunopriveliged ectopic site that permits prolonged islet allograft survival without systemic immunosuppression.
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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