Theranostics · 2026
Submicron-sized ultrasound contrast agents as therapeutic peptide delivery vehicles in type 1 diabetes.
СтатьяНазвание и аннотация: Перевод пока не подготовлен
Обработка статьи · этапы, ошибки и управление
Загрузка состояния…
Ошибки и ограничения
История · было → стало
Состояние обновляется каждые 5 секунд, пока блок открыт. Процент показывается только там, где известен объём работы. Пауза останавливает продолжение этапа; текущий запрос к источнику может завершиться.
Ciccaglione Mark, Abenojar Eric, Kosmides Theresa, DiLisio James E, McDaniel Kristen A, Hartmoore Kathryn, Gresch Anne, Jarrell Dillon K, Ramirez David G, Sticco-Ivins Maura, Michels Aaron W, Haskins Kathryn, Exner Agata A, Benninger Richard K P
Аннотация
BACKGROUND: Type 1 diabetes (T1D) is an autoimmune disease where autoreactive T cells infiltrate pancreatic islets, resulting in beta-cell destruction. Antigen-specific immunotherapy with tolerogenic peptides to induce peripheral tolerance has shown promise in preclinical studies but has not shown clinical efficacy.
METHODS: Here, we develop peptide-nanobubbles (NBs) as an image-guided platform for induction of peripheral immune tolerance in mouse models of T1D. Sub-micron sized NB ultrasound contrast agents can passively accumulate in pancreatic islets of non-obese diabetic (NOD) mice during the development of diabetes as a result of increased microvascular permeability. We incorporated an insulin B:9-23 peptide mimotope into NBs to target peptides to pancreatic islets for expansion of islet-resident regulatory T cells.
RESULTS: NBs retained normal size distribution and acoustic properties following peptide incorporation. Peptide-NBs accumulated in islets of NOD mice and this accumulation could be visualized in real time using contrast enhanced ultrasound. This resulted in an increased proportion of islet insulin-reactive regulatory T cells. Further, peptide-NBs prepared with a hybrid insulin peptide (HIP) expanded islet HIP-reactive regulatory T cells and substantially delayed diabetes onset in an adoptive transfer mouse model of autoimmune diabetes.
CONCLUSIONS: Peptide-NBs offer a promising 'theranostic' approach for induction of peripheral tolerance in T1D while monitoring delivery and action via ultrasound contrast.
METHODS: Here, we develop peptide-nanobubbles (NBs) as an image-guided platform for induction of peripheral immune tolerance in mouse models of T1D. Sub-micron sized NB ultrasound contrast agents can passively accumulate in pancreatic islets of non-obese diabetic (NOD) mice during the development of diabetes as a result of increased microvascular permeability. We incorporated an insulin B:9-23 peptide mimotope into NBs to target peptides to pancreatic islets for expansion of islet-resident regulatory T cells.
RESULTS: NBs retained normal size distribution and acoustic properties following peptide incorporation. Peptide-NBs accumulated in islets of NOD mice and this accumulation could be visualized in real time using contrast enhanced ultrasound. This resulted in an increased proportion of islet insulin-reactive regulatory T cells. Further, peptide-NBs prepared with a hybrid insulin peptide (HIP) expanded islet HIP-reactive regulatory T cells and substantially delayed diabetes onset in an adoptive transfer mouse model of autoimmune diabetes.
CONCLUSIONS: Peptide-NBs offer a promising 'theranostic' approach for induction of peripheral tolerance in T1D while monitoring delivery and action via ultrasound contrast.