TY - JOUR
T1 - Secreted factors from dental pulp stem cells improve glucose intolerance in streptozotocin-induced diabetic mice by increasing pancreatic β-cell function
AU - Izumoto-Akita, Takako
AU - Tsunekawa, Shin
AU - Yamamoto, Akihito
AU - Uenishi, Eita
AU - Ishikawa, Kota
AU - Ogata, Hidetada
AU - Iida, Atsushi
AU - Ikeniwa, Makoto
AU - Hosokawa, Kaori
AU - Niwa, Yasuhiro
AU - Maekawa, Ryuya
AU - Yamauchi, Yuichiro
AU - Seino, Yusuke
AU - Hamada, Yoji
AU - Hibi, Hideharu
AU - Arima, Hiroshi
AU - Ueda, Minoru
AU - Oiso, Yutaka
N1 - Publisher Copyright:
© 2015, BMJ Publishing Group. All rights reserved.
PY - 2015/10/19
Y1 - 2015/10/19
N2 - Objective: Many studies have reported that stem cell transplantation promotes propagation and protection of pancreatic β-cells in streptozotocin (STZ)-induced diabetic mice without the differentiation of transplanted cells into pancreatic β-cells, suggesting that the improvement is due to a paracrine effect of the transplanted cells. We investigated the effects of factors secreted by dental pulp stem cells from human exfoliated deciduous teeth (SHED) on β-cell function and survival. Research design and methods: Conditioned medium from SHED (SHED-CM) was collected 48 h after culturing in serum-free Dulbecco’s modified Eagle’s medium (DMEM). The insulin levels in SHEDCM and serum-free conditioned media from human bone marrow-derived mesenchymal stem cells (BMCM) were undetectable. STZ-induced diabetic male C57B/6J mice were injected with DMEM as a control, SHED-CM, exendin-4 (Ex-4), or BM-CM for 14 days. Mouse pancreatic β-cell line MIN6 cells were incubated with different concentrations of STZ with SHED-CM, DMEM, Ex-4, or BM-CM for 6 h. Results: Administration of 1 mL of SHED-CM twice a day improved glucose intolerance in STZ-induced diabetic mice and the effect continued for 20 days after the end of treatment. SHED-CM treatment increased pancreatic insulin content and β-cell mass through proliferation and an intraperitoneal glucose tolerance test revealed enhanced insulin secretion. Incubation of MIN6 cells (a mouse pancreatic β-cell line) with SHEDCM enhanced insulin secretion in a glucose concentration-dependent manner and reduced STZinduced cell death, indicating that the amelioration of hyperglycemia was caused by the direct effects of SHED-CM on β-cell function and survival. These effects were more pronounced than with the use of Ex-4, a conventional incretin-based drug, and BM-CM, which is a medium derived from other stem cells. Conclusions: These findings suggest that SHED-CM provides direct protection and encourages the propagation of β-cells, and has potential as a novel strategy for treatment of diabetes.
AB - Objective: Many studies have reported that stem cell transplantation promotes propagation and protection of pancreatic β-cells in streptozotocin (STZ)-induced diabetic mice without the differentiation of transplanted cells into pancreatic β-cells, suggesting that the improvement is due to a paracrine effect of the transplanted cells. We investigated the effects of factors secreted by dental pulp stem cells from human exfoliated deciduous teeth (SHED) on β-cell function and survival. Research design and methods: Conditioned medium from SHED (SHED-CM) was collected 48 h after culturing in serum-free Dulbecco’s modified Eagle’s medium (DMEM). The insulin levels in SHEDCM and serum-free conditioned media from human bone marrow-derived mesenchymal stem cells (BMCM) were undetectable. STZ-induced diabetic male C57B/6J mice were injected with DMEM as a control, SHED-CM, exendin-4 (Ex-4), or BM-CM for 14 days. Mouse pancreatic β-cell line MIN6 cells were incubated with different concentrations of STZ with SHED-CM, DMEM, Ex-4, or BM-CM for 6 h. Results: Administration of 1 mL of SHED-CM twice a day improved glucose intolerance in STZ-induced diabetic mice and the effect continued for 20 days after the end of treatment. SHED-CM treatment increased pancreatic insulin content and β-cell mass through proliferation and an intraperitoneal glucose tolerance test revealed enhanced insulin secretion. Incubation of MIN6 cells (a mouse pancreatic β-cell line) with SHEDCM enhanced insulin secretion in a glucose concentration-dependent manner and reduced STZinduced cell death, indicating that the amelioration of hyperglycemia was caused by the direct effects of SHED-CM on β-cell function and survival. These effects were more pronounced than with the use of Ex-4, a conventional incretin-based drug, and BM-CM, which is a medium derived from other stem cells. Conclusions: These findings suggest that SHED-CM provides direct protection and encourages the propagation of β-cells, and has potential as a novel strategy for treatment of diabetes.
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U2 - 10.1136/bmjdrc-2015-000128
DO - 10.1136/bmjdrc-2015-000128
M3 - Article
AN - SCOPUS:85016621414
SN - 2052-4897
VL - 3
JO - BMJ Open Diabetes Research and Care
JF - BMJ Open Diabetes Research and Care
IS - 1
M1 - e000128
ER -