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Transplant Proc. 2018 Nov;50(9):2847-2853. doi: 10.1016/j.transproceed.2018.03.033. Epub 2018 Mar 16.

Tetrahydrocurcumin Enhances Islet Cell Function and Attenuates Apoptosis in Mouse Islets.

Author information

1
Department of Anesthesia and Pain Medicine, Ulsan University College of Medicine, Gangneung Asan Hospital, Gangneung, Republic of Korea.
2
Department of Surgery, Ulsan University College of Medicine, Gangneung Asan Hospital, Gangneung, Republic of Korea. Electronic address: jhj@gnah.co.kr.
3
Medical Research Institute, Gangneung Asan Hospital, Gangneung, Republic of Korea.
4
College of Korean Medicine, Gachon University, Seongnam, Republic of Korea.

Abstract

BACKGROUND:

The transplantation of isolated pancreatic islets is a promising treatment for diabetes. Curcumin has been used for its pharmacologic effects, such as antidiabetic and anti-inflammatory activities. Tetrahydrocurcumin (THC), one of the major metabolites of curcumin, has been reported to have antioxidant and anti-inflammatory activities. This study examines the hypothesis that preoperative THC treatment can attenuate ischemic damage and apoptosis before islet transplantation.

METHODS:

Islets isolated from Balb/c mice were randomly divided into 2 groups and cultured in medium supplemented with or without THC. In vitro islet viability and function were assessed. After treatment with a cytokine cocktail consisting of tumor necrosis factor-α, interferon-β, and interleukin-1β, islet cell viability, function, and apoptotic status were determined. Proteins related to apoptosis were analyzed using INS-1 cell after streptozocin treatment.

RESULTS:

There was no difference in cell viability between the 2 groups. Islets cultured in the medium supplemented with THC showed 1.3-fold higher glucose-induced insulin secretion than the islets cultured in the medium without THC. After treatment with a cytokine cocktail, glucose-induced insulin release, and NO of the islets were significantly improved in THC-treated islets compared with islets not treated with THC. Apoptosis was significantly decreased, and B-cell lymphoma-2 was elevated in the THC-treated group. The streptozocin-treated INS-1 cell produced significantly higher levels of and B-cell lymphoma-2-associated X protein, caspase-3, and caspase-9 than INS-1 treated with THC.

CONCLUSIONS:

These results suggest that preoperative THC administration enhances islet function before transplantation and attenuates the cytokine-induced damage associated with apoptosis.

[Indexed for MEDLINE]

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