- 作者：Gianluca Carnevale ; Massimo Riccio ; Aless ; ra Pisciotta ; Francesca Beretti ; Tullia Maraldi ; Manuela Zavatti ; Gian Maria Cavallini ; Giovanni Battista La Sala ; Adriano Ferrari ; Anto De Pol
- 关键词：¦Â-Cells ; Diabetes ; hAFSCs ; hDPSCs ; Insulin
- 刊名：Digestive and Liver Disease
- 出版年：2013
- 出版时间：August, 2013
- 年：2013
- 卷：45
- 期：8
- 页码：669-676
- 全文大小：3632 K
Aim
To investigate the ability of human amniotic fluid stem cells and human dental pulp stem cells to differentiate into insulin-producing cells.Methods
Human amniotic fluid stem cells and human dental pulp stem cells were induced to differentiate into pancreatic ¦Â-cells by a multistep protocol. Islet-like structures were assessed in differentiated human amniotic fluid stem cells and human dental pulp stem cells after 21 days of culture by dithizone staining. Pancreatic and duodenal homebox-1, insulin and Glut-2 expression were detected by immunofluorescence and confocal microscopy. Insulin secreted from differentiated cells was tested with SELDI-TOF MS and by enzyme-linked immunosorbent assay.
Results
Human amniotic fluid stem cells and human dental pulp stem cells, after 7 days of differentiation started to form islet-like structures that became evident after 14 days of induction. SELDI-TOF MS analysis, revealed the presence of insulin in the media of differentiated cells at day 14, further confirmed by enzyme-linked immunosorbent assay after 7, 14 and 21 days. Both stem cell types expressed, after differentiation, pancreatic and duodenal homebox-1, insulin and Glut-2 and were positively stained by dithizone. Either the cytosol to nucleus translocation of pancreatic and duodenal homebox-1, either the expression of insulin, are regulated by glucose concentration changes. Day 21 islet-like structures derived from both human amniotic fluid stem cells and human dental pulp stem cell release insulin in a glucose-dependent manner.
Conclusion
The present study demonstrates the ability of human amniotic fluid stem cells and human dental pulp stem cell to differentiate into insulin-producing cells, offering a non-pancreatic, low-invasive source of cells for islet regeneration.