MON-500 Adrenal Bioprinted Tissue Therapeutics Restore Function in Murine Models of Primary Adrenal Insufficiency
Bibliographic record
Abstract
Abstract Disclosure: H. Soliman: None. Z.A. Bazzi: None. O. Nemirovsky: None. S. Keshvani: None. C. Song: None. N.A. Chan: None. S. Gicole: None. R.B. Jalili: None. S. Wadsworth: None. C.T. Dickman: None. Primary adrenal insufficiency, caused by either autoimmune Addison’s disease or congenital adrenal hyperplasia, is a life-threatening condition that requires lifelong adrenal hormone replacement. Current hormone replacement therapies have a high treatment burden and fail to mimic the natural circadian rhythms of hormone secretion. Transplanting functional adrenal cells has the potential to restore the natural hypothalamic-pituitary-adrenal (HPA) axis feedback loop, enabling dynamic hormonal regulation that mimics physiological function rather than relying on fixed-dose steroid replacement. An allogeneic cell therapy that achieves this without the need for chronic immune suppression could be a breakthrough in the treatment of primary adrenal insufficiency. Adrenal Bioprinted Tissue Therapeutics (BTTs) were developed using primary human adrenocortical cells with Aspect Biosystems’ full-stack tissue therapeutic platform, which incorporates proprietary bioprinting technology. These cells were encapsulated in a cell-supporting biomaterial with an immunoprotective outer shell. In vitro assessment of these BTTs indicated that the encapsulated adrenal cells were viable for extended durations and able to sense exogenously administered adrenocorticotrophic hormone (ACTH) and respond by releasing cortisol. Implantation of these xenogeneic adrenal BTTs in adrenalectomized mice led to a dose-dependent, rapid, marked, and sustained responsive elevation of plasma cortisol and reduction in plasma ACTH, as well as an increase in survival. There was a robust response to exogenously administered ACTH resulting in a significant increase in plasma cortisol in mice implanted with adrenal BTTs. ACTH responsive cortisol secretion was observed through study end at six months. To assess whether implanted adrenal BTTs respond to physiological circadian fluctuations in endogenous mouse ACTH levels, plasma cortisol and ACTH were measured mornings and evenings and showed that plasma cortisol levels followed the same secretion pattern as endogenous ACTH in the adrenalectomized mice, indicating responsiveness of the implanted BTTs to physiological fluctuations in ACTH. Adrenal BTTs retrieved from mice at termination after six months demonstrated high viability and remained responsive to in vitro incubation with ACTH. These results indicate that Aspect Biosystems’ adrenal BTTs can restore precise ACTH responsive adrenal function with appropriate circadian rhythm in in vivo models of primary adrenal insufficiency. Such an approach could revolutionize therapy for patients with primary adrenal insufficiency. Presentation: Monday, July 14, 2025
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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 | 0.000 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.001 |
| Bibliometrics | 0.001 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.001 | 0.002 |
| Insufficient payload (model declined to judge) | 0.003 | 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".