Biochimica et biophysica acta · 2009
Amyloid inhibitors enhance survival of cultured human islets.
СтатьяПоддержка исследования: вне правительства СШАНазвание и аннотация: Перевод в очереди
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.
Potter Kathryn J, Scrocchi Louise A, Warnock Garth L, Ao Ziliang, Younker Marika A, Rosenberg Lawrence, Lipsett Mark, Verchere C Bruce, Fraser Paul E
Аннотация
BACKGROUND: Amyloid fibrils created by misfolding and aggregation of proteins are a major pathological feature in a variety of degenerative diseases. Therapeutic approaches including amyloid vaccines and anti-aggregation compounds in models of amyloidosis point to an important role for amyloid in disease pathogenesis. Amyloid deposits derived from the beta-cell peptide islet amyloid polypeptide (IAPP or amylin) are a characteristic of type 2 diabetes and may contribute to loss of beta-cells in this disease.
METHODS: We developed a cellular model of rapid amyloid deposition using cultured human islets and observed a correlation between fibril accumulation and beta-cell death. A series of overlapping peptides derived from IAPP was generated.
RESULTS: A potent inhibitor (ANFLVH) of human IAPP aggregation was identified. This inhibitory peptide prevented IAPP fibril formation in vitro and in human islet cultures leading to a striking increase in islet cell viability.
CONCLUSIONS: These findings indicate an important contribution of IAPP aggregation to beta-cell death in situ and point to therapeutic applications for inhibitors of IAPP aggregation in enhancing beta-cell survival.
GENERAL SIGNIFICANCE: Anti-amyloid compounds could potentially reduce the loss of beta-cell mass in type 2 diabetes and maintain healthy human islet cultures for beta-cell replacement therapies.
METHODS: We developed a cellular model of rapid amyloid deposition using cultured human islets and observed a correlation between fibril accumulation and beta-cell death. A series of overlapping peptides derived from IAPP was generated.
RESULTS: A potent inhibitor (ANFLVH) of human IAPP aggregation was identified. This inhibitory peptide prevented IAPP fibril formation in vitro and in human islet cultures leading to a striking increase in islet cell viability.
CONCLUSIONS: These findings indicate an important contribution of IAPP aggregation to beta-cell death in situ and point to therapeutic applications for inhibitors of IAPP aggregation in enhancing beta-cell survival.
GENERAL SIGNIFICANCE: Anti-amyloid compounds could potentially reduce the loss of beta-cell mass in type 2 diabetes and maintain healthy human islet cultures for beta-cell replacement therapies.