ENCRT-103-hPI: Evaluation of an Immune-protected ENCRT-103-hPI Containing Primary Human Islets in Adults With Type 1 Diabetes, With and Without Standard-of-care Portal Vein Islet Infusion.

This study is a dual-arm, three-centre, non-randomized, FIH trial that will evaluate the safety of the ENCRT-103-hPI in patients with T1D. Study subjects may be receiving standard of care islet infusion (cohort A), or not (cohort B). Cohort B will receive a special access drug regimen compared to cohort A's standard of care immune management.

Both cohorts will experience equivalent processes: donor matching, comparable ENCRT-103-hPI dosages, implant into the upper arm or abdomen, explant at 4 mo and post surgical followup.

The primary objective is to evaluate the safety, tolerability, and local tissue response of fully immune-protected ENCRT devices containing primary human islets in adults with Type 1 Diabetes. Included in assessments are vascular integration and immune cell exclusion.

The secondary objectives are to evaluate of the activity, function, and survival of the donor islets from the retrieved ENCRT-103-hPI.

The exploratory objectives include measures of circulating and stimulated C-peptide, HbA1c, insulin use doses, and when available, CGM trends.

Inclusion criteria

• follows those of the institutions' standard of care (cohort A) or care team's guidelines (cohort B).

Exclusion criteria

• - follows those of the institutions' standard of care (cohort A) or care team's guidelines (cohort B).