- Open Access
Transplantation of insulin-producing cells from umbilical cord mesenchymal stem cells for the treatment of streptozotocin-induced diabetic rats
© Tsai et al.; licensee BioMed Central Ltd. 2012
- Received: 11 February 2012
- Accepted: 30 April 2012
- Published: 30 April 2012
Although diabetes mellitus (DM) can be treated with islet transplantation, a scarcity of donors limits the utility of this technique. This study investigated whether human mesenchymal stem cells (MSCs) from umbilical cord could be induced efficiently to differentiate into insulin-producing cells. Secondly, we evaluated the effect of portal vein transplantation of these differentiated cells in the treatment of streptozotocin-induced diabetes in rats.
MSCs from human umbilical cord were induced in three stages to differentiate into insulin-producing cells and evaluated by immunocytochemistry, reverse transcriptase, and real-time PCR, and ELISA. Differentiated cells were transplanted into the liver of diabetic rats using a Port-A catheter via the portal vein. Blood glucose levels were monitored weekly.
Human nuclei and C-peptide were detected in the rat liver by immunohistochemistry. Pancreatic β-cell development-related genes were expressed in the differentiated cells. C-peptide release was increased after glucose challenge in vitro. Furthermore, after transplantation of differentiated cells into the diabetic rats, blood sugar level decreased. Insulin-producing cells containing human C-peptide and human nuclei were located in the liver.
Thus, a Port-A catheter can be used to transplant differentiated insulin-producing cells from human MSCs into the portal vein to alleviate hyperglycemia among diabetic rats.
- Mesenchymal stem cell
- Portal vein
- Insulin-producing cells
Type 1 DM is an autoimmune disease that is characterized by inhibited insulin production as a result of T cell-mediated destruction of the pancreatic β cells in the islets of Langerhans [1, 2]. Transplantation therapies for type 1 DM include whole organ transplantation , transplantation of isolated islets [4, 5] and regeneration therapy . Although the transplantation of both a whole organ and isolated islets has been successfully used in the clinical treatment of type 1 DM, a shortage of donors limits the widespread use of this treatment modality. Additionally, the quality of a donor’s pancreas is an important criterion for islet isolation . On the other hand, regeneration therapy, in which stem cells are stimulated to differentiate into insulin-producing cells that can be used to replace lost β cells, is free of such supply limitations .
Mesenchymal stem cells (MSCs) were first isolated from bone marrow  and have the potential to differentiate in culture into muscle cells, adipocytes, osteocytes, chondrocytes [10–12], cardiomyocytes [13–16] and pancreatic β cells . Moreover, following systemic injection, MSCs have been shown to be incorporated into a variety of tissues, including bone [18, 19], muscle , lung  and epithelium . Although insulin-producing cells can be developed from bone marrow MSCs , adipose tissue-derived stem cells , and human umbilical cord blood-derived mononuclear cells , the number of MSCs that can be cost-effectively isolated and differentiated remains a major limitation. We found that fibroblast-like cells from Wharton’s jelly of the human umbilical cord were similar to MSCs in the bone marrow and could be induced to differentiate into adipogenic cells, osteogenic cells, cardiomyogenic cells, and insulin-producing cells [26, 27]. Because MSCs from the umbilical cord can be easily isolated and expanded in culture, they may provide a novel source of cells for cellular type 1 DM therapies.
In this study, we first characterized the insulin-producing cells derived from MSCs of Wharton’s jelly with modified three stages β cell differentiation method . Subsequently, we treated diabetic rats by transplanting the differentiated insulin-producing cells into their livers through the portal vein. Instead of using renal subcapsular space  or tail vein  transplantation, we used a specially designed Port-A catheter portal delivery system that has been used in human islets transplantation [4, 5]. In this study, streptozotocin (STZ) was used to induce type 1 DM because there is extensive evidence that hyperglycemia induced by STZ can be lowered by stem cell therapy [30–33]. STZ is a naturally occurring chemical that is toxic to pancreatic β-cells in mammals and can produce an animal model of type 1 DM. The aim of this study was to test the curative effect of transplanting insulin-producing cells differentiated from human Wharton’s jelly MSCs into rat livers.
Institutional Review Board approval was obtained for all procedures. With the written informed consent of the parents, fresh human umbilical cords were obtained after birth and stored in Hank’s balanced salt solution (Biological Industries, Israel) prior to tissue processing to obtain MSCs. The isolation of MSCs followed the methods set forth by Wang et al. . Briefly, after removal of blood vessels, the mesenchymal tissue was scraped off the Wharton’s jelly and centrifuged at 250 g for 5 min. After centrifugation, the pellets were re-suspended in 15 ml of serum-free Dulbecco’s modified Eagle’s medium (DMEM; Gibco, Grand Island, NY) containing 0.2 g/ml of collagenase and incubated for 16 h at 37°C. Next, the cells were washed, resuspended in DMEM containing 2.5% trypsin, and incubated for 30 min at 37°C with agitation. Finally, cells were again washed, and cultured in DMEM supplemented with 10% fetal bovine serum (FBS; Sigma St. Louis, MO, USA) and glucose (4.5 g/l) in 5% CO2 in a 37°C incubator.
In vitro differentiation cultures
Immunocytochemical staining for C-peptide
Control and differentiated cells on coverslips were fixed with 4% paraformaldehyde for 15 minutes, and washed with phosphate-buffered saline (PBS). A DakoCytomation EnVision+Dual system-HRP kit (DakoCytomation Inc, CA) and mouse anti-human C-peptide antibody (Chemicon, Billerica, MA) were used to stain the cells. Briefly, Dual Endogenous Enzyme Block solution was added to cover the coverslips for 10 minutes. Next, the cells were washed with PBS and incubated for 1 h at 37°C with mouse anti-human C-peptide monoclonal antibody (1:100). After washing with PBS, the coverslips were incubated for 30 min with labeled Polymer-HRP. After another round of washing with PBS, Substrate-Chromogen was added for 5 min. Finally, the coverslips were washed with distilled water. Cell nuclei were visualized by incubating the coverslips for 5 min at room temperature with hematoxylin (Sigma Aldrich, St. Louis).
Reverse transcriptase-polymerase chain reaction (PCR) analysis
Total RNA was extracted from control and differentiated cells using RNeasy Purification Reagent (Qiagen, Valencia, CA). Subsequently, a 4 μg sample was reverse transcribed with Mmlv reverse transcriptase (Amersham, Uppsala, Sweden) for 30 min at 42°C in the presence of an oligo-dT primer. The PCR reaction mixture consisted of 38.5 μl of sterile distilled water, 5 μl of 10X PCR buffer, 1 μl of dNTP, 1.5 μl of each primer, 2 μl of cDNA (4 μg), and 0.5 μl of polymerase (5 U/ μl) (Amersham). cDNA was amplified for 30 cycles (94°C for 45 s, annealing for 45 s, and 72°C for 40 s) using the following primer sequences: Pdx1 forward GGAGCCGGAGGAGAACAAG, reverse CTCGGTCAAGTTCAACATGACAG; Pax4 forward GGGTCTGGTTTTCCAACAGAAG, reverse CAGCGCTGCTGGACTT; insulin, forward GCTGGTAGAGGGAGCAGATG, reverse AGCCTTTGTGAACCAACACC; GAPDH, forward CACCATCTTCCAGGAGCGAG, reverse TCACGCCACAGTTTCCCGGA (Mission Biotech, Taiwan). PCR was performed for 30 cycles of denaturation at 95°C for 30 s, annealing at 55-63°C for 30 s, and elongation at 72°C for 1 min, with a final 10 min extension at 72°C. To exclude the possibility of contaminating genomic DNA, PCRs were also run without reverse transcriptase. The amplified cDNA was separated by electrophoresis on a 1% agarose gel, stained, and photographed under ultraviolet light.
Real-time PCR analysis
cDNA was prepared from 4 μg of total RNA as described above and 200 ng of RNA equivalents was used for PCR with specific primers in the presence of SYBR Green I (Light CyclerTM-FastStart DNA Master SYBR Green I; Roche, Basel, Switzerland). The sequences of the primers were as follows: Pdx1 forward GGAGCCGGAGGAGAACAAG, reverse CTCGGTCAAGTTCAACATGACAG; Pax4 forward GGGTCTGGTTTTCCAACAGAAG, reverse CAGCGCTGCTGGACTT; insulin forward ACCAGCATCTGCTCCCTCTA, reverse GGTTCAAGGGCTTTATTCCA; GAPDH forward CACCATCTTCCAGGAGCGAG, reverse TCACGCCACAGTTTCCCGGA (Mission Biotech). A LightCycler® 480 (Roche, Indianapolis, IN) was used for real-time PCR.
Measurement of spontaneous C-peptide secretion
After 10 days of differentiation, the cells were washed with PBS and incubated for 3 h in DMEM-LG (5.5 mM glucose) (Gibco, NY). The medium was collected and stored at −20°C until being assayed. C-peptide ELISA kit (Mercodia, Uppsala, Sweden) was used according to the manufacturer’s instructions. Briefly, 25 μl of the sample was added to 50 μl of assay buffer in the wells of a 96-well plate coated with anti-human C-peptide antibody. The mixture was incubated for 1 h at 18-25°C on a shaker. After six washes with washing buffer, 100 μl of enzyme conjugate was added to the mixture and incubated on a shaker for 1 h at 18-25°C. Next, 200 μl of substrate TMB was added for 15 min. Finally, stop solution (50 μl) was added to the wells for 5 sec and the absorbance was read at 450 nm.
Glucose challenge test
After 10 days of differentiation, the cells were incubated for 1 h in DMEM-LG (5.5 mM glucose), and the medium was collected and stored at −20°C. Next, the cells were washed with PBS and incubated for 1 h in DMEM-HG (25 mM glucose; Gibco, NY) and the medium was collected and stored at −20°C. The C-peptide concentration was determined using the C-peptide ELISA kit.
A total of 18 male, 6- to 8-weeks-old Sprague Dawley rats, weighing between 350–450 g (Laboratory Animal Center, Yang-Ming University, Taiwan) were provided with food and water ad libitum and were housed on a 12-h light and 12-h dark cycle. The experiment followed institutional guidelines pertaining to animal welfare.
Induction of DM with STZ
One week after surgery, 30 mg/kg of STZ ((Sigma Aldrich) solution in acidified 0.9% saline (pH 4.5) was injected intraperitoneally into the rats on 3 consecutive days to induce type 1 DM.
Rats were divided into one control group (without STZ induction), and two transplantation groups, each of which consisted of six rats. One week after STZ induction, rats the experimental group were restrained and injected with 5 × 106 differentiated insulin-producing cells suspended in 0.1 ml of normal saline, followed by a volume of normal saline equivalent to the volume of the Port-A catheter (0.35 ml) to push the grafts into the portal vein. The control group underwent the same procedure, but was only injected with normal saline (STZ group).
Body weight and blood sugar were recorded every week after transplantation. Sugar levels in the blood collected from the tail vein were measured using a blood glucose meter (Roche, Indianapolis, IN).
Eight weeks following transplantation the rats were sacrificed and perfused with 4% formaldehyde (Ferak, Berlin, Germany). Rat livers were cut into 0.5-1.0 cm3 pieces. The samples were dehydrated and embedded in OCT (Sakura Fintek, USA) in liquid nitrogen. The cryosections (5 μm) were washed with PBS, then incubated overnight at 4°C with mouse anti-human nuclei monoclonal antibody (1:400; Chemicon, Billerica, MA), and rabbit anti-human C-peptide antibodies (1:100; Santa Cruz, Santa Cruz, CA). After washing with PBS, the slides were subsequently incubated for 1 h with Cy3-labeled goat anti-human IgG antibodies (1:200) and rhodamine conjugated goat anti-rabbit IgG antibodies (1:500) (both from Chemicon). The sections were mounted with mounting medium (Vector) and viewed on a fluorescence microscope.
Each series of experiments was performed in triplicate. The results obtained from a typical experiment were expressed as the means ± standard deviation (SD). Statistical analysis was carried out using the SPSS 14.0 software program (Statistics Package for Social Sciences, SPSS Inc. Chicago, Illinois, USA). All continuous data were presented as mean ± SD. Student’s t-test was used to compare the means of two groups. Categorical variables were compared by χ2 test or Fisher’s exact test. A P value of less than, or equal to 0.05 was considered to be statistically significant.
Gene expression in the differentiated cells
Detection of C-peptide in the differentiated cells derived from mesenchymal stem cells from the umbilical cord
Immunofluorescent staining for C-peptide
Secretion of C-peptide by insulin-producing cells upon glucose stimulation
Effect on STZ rats blood sugar changes after cell transplantation
Immunofluorescent staining for human C-peptide and human cell nuclei of the rat livers after transplantation
By six weeks post-transplantation, insulin-producing cell function was evidenced by the appearance of both human C-peptide and human cell nuclei in the same location within the lobules of the rat liver (Figure 6B and 6C). Conversely, neither the human C-peptide or human cell nuclei were detected in the Sham group (data not shown). These findings suggest that the insulin-secreting cells differentiated from human Wharton’s jelly stem cells were able to function as islet-like structures following transplantation.
Adult bone marrow-derived cells can be induced to differentiate into insulin-producing cells under defined conditions . Stem cell regeneration is an attractive insulin replacement therapy for those with insulin dependent DM. Stem cells from the pancreas [34, 35], bone marrow , umbilical cord blood , and embryo  have previously been used in research on regeneration therapies for DM. Recently, we found that Wharton’s jelly from the human umbilical cord contains fibroblast-like cells, which are similar to MSCs . In this study, we investigated the ability of these cells to differentiate into insulin-producing cells, as well as the potential curative effects of transplanting the insulin-producing cells into the livers of diabetic rats. Simultaneously, we tested the usefulness of the modified Port-A catheter in transplantation.
Our results illustrate that human umbilical cord MSCs could be differentiated into insulin-producing cells following incubation under specific conditions . Based on current references of pancreas endocrine cell development, a combination of various factors, including activin A, sodium butyrate, growth factors in serum free media supplements were used in this study (Figure 1).
Due to the controversy surrounding insulin uptake by cells from media supplements [37, 38], we used human C-peptide to characterize insulin production by our cells. Proinsulin, the precursor of insulin, is composed of 3 segments, the A-chain, B-chain, and C-peptide. Although C-peptide is released from proinsulin, unlike the A- and B-chains, it is not taken up by the cells. Thus, levels of C-peptide can be used as a marker of insulin secretion. After exposure of MSCs to differentiation conditions, immunocytochemical staining revealed that the cells expressed both insulin and C-peptide.
In a prior study we demonstrated that pancreatic endocrine precursor (PEP) cells could be generated from human umbilical cord MSCs . In our in vitro studies, expression of β-cell development-related genes was examined by reverse transcriptase and real time PCR before and after induction of differentiation. After differentiation for 17 days, the insulin-producing cells expressed the following pancreatic β-cell development-related genes: Pax4 Nkx2.2 MafA NeuroD Isl-1 Glut2 and insulin. Additionally, our C-peptide secretion assays revealed that the differentiated cells generated in vitro displayed functional characteristics of insulin-producing cells. After the cells were transplanted into the NOD mice via a retro-orbital vein, blood sugar levels tended to decrease .
In this study, Wharton’s jelly was induced to differentiate into islet-like cell aggregates. After differentiation for 10 days, the insulin-producing cells expressed the following pancreatic β-cell development-related genes: Pax4, Pax1 and insulin. Additionally, we found greater expression of C-peptide in differentiated versus undifferentiated MSCs (Figure 1A). After the cells were transplanted into the STZ induced rats via a portal, we found that blood sugar levels tended to decrease in comparison to STZ rats receiving sham transplantation. This method of developing insulin-producing cells was more effective, inexpensive and less time consuming.
In the current study, Wharton’s jelly tissue was used as opposed to pancreatic stem cells, as the former contains much greater quantities of stem cells than the pancreatic duct. Specifically, each cubic centimeter of Wharton’s jelly sample contains 1–1.5 × 104 MSCs and the number of cells increases 300-fold after seven passages, providing a plentiful supply of cells for transplantation. In addition, the use of Wharton’s jelly stem cells is preferable to embryonic stem (ES) cells, as doing so avoids the risk of teratoma formation as well as the ethical issues inherent in using ES cells.
The portal vein , renal subcapsular space , and tail vein  have been previously used as stem cell transplant locations for insulin regeneration therapies in the rat. In this study, cells were transplanted into the rat liver via the portal vein. Interestingly, we have observed that blood sugar levels tend to decrease sooner when using hepatic portal vein transplantation instead of renal subcapsular transplantation . These results are likely related to the finding that transplantation into the liver is more advantageous than renal subcapsular transplantation for diabetes therapy, as the former technique provides a larger surface area for implantation and recapitulates an orthotopic site physiologically. Specifically, secreted insulin enters the portal system (via the superior mesenteric vein) rather than the systemic venous system (via the renal vein) . In our previous study , transplantation of insulin-producing cells via the retro-orbital vein was used to treat NOD mice. Though techniquely it is easier to perform and less invasive than via portal vein, higher mortality rate in mice and less number (1 × 105) of MSCs could be used were the major obstacles. Transplantation of MSCs via retro-orbital vein may only be used for the smaller animals. It has been reported that insulin-producing cells were injected directly into liver parenchymal of STZ induced diabetic rats to lower blood glucose level . However, this transplantation method applied to clinical setting is limited. In clinical application, the Edmonton Protocol involves isolating islets from a cadaveric donor pancreas. Each recipient needs to transplant islets isolated from one to as many as three donors. The islets are infused into the patient’s portal vein, then these islets are stored at the liver to produces insulin. For clinical application to use hMSCs as a cell transplantation source for diabetic regeneration therapy, proof of usefulness of hMSCs transplantation via the portal vein in a large animal diabetic model is needed.
In order to test the function of the MSC-derived insulin-producing cells in vivo, we transplanted the differentiated cells into STZ-induced DM rats via a Port-A catheter into the portal vein. The modified Port-A catheter used in this study has two main advantages over techniques described in previous studies. First, since only a very small part of the catheter is inserted into the widest part of the portal vein, no veins are clamped permanently, in contrast to previous methods [42, 43], and the disturbance to intestinal blood flow is minimized. Additionally, the use of a port enhances catheter longevity, thereby permitting longer periods of infusion. Indeed, the reported duration of use of a Port-A catheter is 9–34 months .
Following transplantation of insulin-producing cells into diabetic rats in the current study, C-peptide was found in the transplanted cells of the liver and blood glucose levels decreased. Both of these findings suggest that the transplanted cells secreted functional insulin. Indeed, on the fourth week after transplantation, blood glucose levels decreased to approximately 250 mg/dl in the compared to 530 mg/dl in the STZ controls. Nevertheless, we believe that transplantation may slow down the appearance of symptoms of DM rather than cure the disease.
Our results show that human MSCs derived from umbilical cord can differentiate into pancreatic lineage cells in vitro and function as insulin-producing cells both in vitro and in vivo. Thus, these cells are a promising stem cell source for β-cell regeneration. Additionally, the modified Port-A catheter used in this study is an important method for the transplantation of insulin-producing cells. Further work is required to examine the curative effects on larger animal models and humans.
This work was funded by Grants from Taipei Veterans General Hospital (V99E1-004 and V99C1-201) and Program for Progress Towards Top-Level University in National Yang Ming University to T-H Chen; National Science Council Grant, NSC 98-2314-B-075-015-MY3, to Y-M Shyr and NSC 97-2320-B-010-019-MY3, to H-S Wang; Medical Research Grant, TSGH-C101-121 and NDMC-D101-3-3, to J-F Shyu.
- Bottazzo GF, Florin-Christensen A, Doniach D: Islet-cell antibodies in diabetes mellitus with autoimmune polyendocrine deficiencies. Lancet. 1974, 2: 1279-1283.View ArticlePubMedGoogle Scholar
- Gepts W: Pathologic anatomy of the pancreas in juvenile diabetes mellitus. Diabetes. 1965, 14: 619-633.View ArticlePubMedGoogle Scholar
- Larsen JL: Pancreas transplantation: indications and consequences. Endocr Rev. 2004, 25: 919-946. 10.1210/er.2002-0036.View ArticlePubMedGoogle Scholar
- Ryan EA, Lakey JR, Rajotte RV, Korbutt GS, Kin T, Imes S, Rabinovitch A, Elliott JF, Bigam D, Kneteman NM, Warnock GL, Larsen I, Shapiro AM: Clinical outcomes and insulin secretion after islet transplantation with the Edmonton protocol. Diabetes. 2001, 50: 710-719. 10.2337/diabetes.50.4.710.View ArticlePubMedGoogle Scholar
- Shapiro AM, Lakey JR, Ryan EA, Korbutt GS, Toth E, Warnock GL, Kneteman NM, Rajotte RV: Islet transplantation in seven patients with type 1 diabetes mellitus using a glucocorticoid-free immunosuppressive regimen. N Eng J Med. 2000, 343: 230-238. 10.1056/NEJM200007273430401.View ArticleGoogle Scholar
- Yamaoka T: Regeneration therapy of pancreatic beta cells: towards a cure for diabetes?. Biochem Biophys Res Commun. 2002, 296: 1039-1043. 10.1016/S0006-291X(02)02000-4.View ArticlePubMedGoogle Scholar
- Matsumoto S, Noguchi H, Hatanaka N, Shimoda M, Kobayashi N, Jackson A, Onaca N, Naziruddin B, Levy MF: Estimation of donor usability for islet transplantation in the United States with the kyoto islet isolation method. Cell Transplant. 2009, 18: 549-556.PubMedGoogle Scholar
- Kobayashi N, Yuasa T, Okitsu T: Regenerative medicine for diabetes mellitus. Cell Transplant. 2009, 18: 491-496.PubMedGoogle Scholar
- Friedenstein AJ, Piatetzky S, Petrakova KV: Osteogenesis in transplants of bone marrow cells. J Embryol Exp Morphol. 1966, 16: 381-390.PubMedGoogle Scholar
- Lennon DP, Edmison JM, Caplan AI: Cultivation of rat marrow-derived mesenchymal stem cells in reduced oxygen tension: effects on in vitro and in vivo osteochondrogenesis. J Cell Physiol. 2001, 187: 345-355. 10.1002/jcp.1081.View ArticlePubMedGoogle Scholar
- Pittenger MF, Mackay AM, Beck SC, Jaiswal RK, Douglas R, Mosca JD, Moorman MA, Simonetti DW, Craig S, Marshak DR: Multilineage potential of adult human mesenchymal stem cells. Science. 1999, 284: 143-147. 10.1126/science.284.5411.143.View ArticlePubMedGoogle Scholar
- Sekiya I, Vuoristo JT, Larson BL, Prockop DJ: In vitro cartilage formation by human adult stem cells from bone marrow stroma defines the sequence of cellular and molecular events during chondrogenesis. Proc Natl Acad Sci U S A. 2002, 99: 4397-4402. 10.1073/pnas.052716199.PubMed CentralView ArticlePubMedGoogle Scholar
- Alvarez-Dolado M, Pardal R, Garcia-Verdugo JM, Fike JR, Lee HO, Pfeffer K, Lois C, Morrison SJ, Alvarez-Buylla A: Fusion of bone-marrow-derived cells with Purkinje neurons, cardiomyocytes and hepatocytes. Nature. 2003, 425: 968-973. 10.1038/nature02069.View ArticlePubMedGoogle Scholar
- Fukuda K: Development of regenerative cardiomyocytes from mesenchymal stem cells for cardiovascular tissue engineering. Artif Organs. 2001, 25: 187-193. 10.1046/j.1525-1594.2001.025003187.x.View ArticlePubMedGoogle Scholar
- Hakuno D, Fukuda K, Makino S, Konishi F, Tomita Y, Manabe T, Suzuki Y, Umezawa A, Ogawa S: Bone marrow-derived regenerated cardiomyocytes (CMG Cells) express functional adrenergic and muscarinic receptors. Circulation. 2002, 105: 380-386. 10.1161/hc0302.102593.View ArticlePubMedGoogle Scholar
- Orlic D: Adult bone marrow stem cells regenerate myocardium in ischemic heart disease. Ann N Y Acad Sci. 2003, 996: 152-157. 10.1111/j.1749-6632.2003.tb03243.x.View ArticlePubMedGoogle Scholar
- Jiang J, Au M, Lu K, Eshpeter A, Korbutt G, Fisk G, Majumdar AS: Generation of insulin-producing islet-like clusters from human embryonic stem cells. Stem Cells. 2007, 25: 1940-1953. 10.1634/stemcells.2006-0761.View ArticlePubMedGoogle Scholar
- Pereira RF, Hume EL, Halford KW, Prockop DJ: Bone fragility in transgenic mice expressing a mutated gene for type I procollagen (COL1A1) parallels the age-dependent phenotype of human osteogenesis imperfecta. J Bone Miner Res. 1995, 10: 1837-1843.View ArticlePubMedGoogle Scholar
- Pereira RF, O’Hara MD, Laptev AV, Halford KW, Pollard MD, Class R, Simon D, Livezey K, Prockop DJ: Marrow stromal cells as a source of progenitor cells for nonhematopoietic tissues in transgenic mice with a phenotype of osteogenesis imperfecta. Proc Natl Acad Sci U S A. 1998, 95: 1142-1147. 10.1073/pnas.95.3.1142.PubMed CentralView ArticlePubMedGoogle Scholar
- Ferrari G, Cusella-De Angelis G, Coletta M, Paolucci E, Stornaiuolo A, Cossu G, Mavilio F: Muscle regeneration by bone marrow-derived myogenic progenitors. Science. 1998, 279: 1528-1530. 10.1126/science.279.5356.1528.View ArticlePubMedGoogle Scholar
- Pereira RF, Halford KW, O’Hara MD, Leeper DB, Sokolov BP, Pollard MD, Bagasra O, Prockop DJ: Cultured adherent cells from marrow can serve as long-lasting precursor cells for bone, cartilage, and lung in irradiated mice. Proc Natl Acad Sci U S A. 1995, 92: 4857-4861. 10.1073/pnas.92.11.4857.PubMed CentralView ArticlePubMedGoogle Scholar
- Spees JL, Olson SD, Ylostalo J, Lynch PJ, Smith J, Perry A, Peister A, Wang MY, Prockop DJ: Differentiation, cell fusion, and nuclear fusion during ex vivo repair of epithelium by human adult stem cells from bone marrow stroma. Proc Natl Acad Sci U S A. 2003, 100: 2397-2402. 10.1073/pnas.0437997100.PubMed CentralView ArticlePubMedGoogle Scholar
- Karnieli O, Izhar-Prato Y, Bulvik S, Efrat S: Generation of insulin-producing cells from human bone marrow mesenchymal stem cells by genetic manipulation. Stem Cells. 2007, 25: 2837-2844. 10.1634/stemcells.2007-0164.View ArticlePubMedGoogle Scholar
- Chandra V, Phadnis S, Nair PD, Bhonde RR: Generation of pancreatic hormone-expressing islet-like cell aggregates from murine adipose tissue-derived stem cells. Stem Cells. 2009, 27: 1941-1953. 10.1002/stem.117.View ArticlePubMedGoogle Scholar
- Parekh VS, Joglekar MV, Hardikar AA: Differentiation of human umbilical cord blood-derived mononuclear cells to endocrine pancreatic lineage. Differentiation. 2009, 78: 232-240. 10.1016/j.diff.2009.07.004.View ArticlePubMedGoogle Scholar
- Wang HS, Hung SC, Peng ST, Huang CC, Wei HM, Guo YJ, Fu YS, Lai MC, Chen CC: Mesenchymal stem cells in the Wharton’s jelly of the human umbilical cord. Stem Cells. 2004, 22: 1330-1337. 10.1634/stemcells.2004-0013.View ArticlePubMedGoogle Scholar
- Wang HS, Shyu JF, Shen WS, Hsu HC, Chi TC, Chen CP, Huang SW, Shyr YM, Tang KT, Chen TH: Transplantation of insulin producing cells derived from umbilical cord stromal mesenchymal stem cells to treat NOD mice. Cell Transplant. 2011, 20 (3): 455-466. 10.3727/096368910X522270.View ArticlePubMedGoogle Scholar
- Suen PM, Li K, Chan JC, Leung PS: In vivo treatment with glucagon-like peptide 1 promotes the graft function of fetal islet-like cell clusters in transplanted mice. Int J Biochem Cell Biol. 2006, 38: 951-960. 10.1016/j.biocel.2005.08.005.View ArticlePubMedGoogle Scholar
- Banerjee M, Kumar A, Bhonde RR: Reversal of experimental diabetes by multiple bone marrow transplantation. Biochem Biophys Res Commun. 2005, 328: 318-325. 10.1016/j.bbrc.2004.12.176.View ArticlePubMedGoogle Scholar
- Hussain MA, Theise ND: Stem-cell therapy for diabetes mellitus. Lancet. 2004, 364: 203-205. 10.1016/S0140-6736(04)16635-X.View ArticlePubMedGoogle Scholar
- Serup P, Madsen OD, Mandrup-Poulsen T: Islet and stem cell transplantation for treating diabetes. BMJ. 2001, 322: 29-32. 10.1136/bmj.322.7277.29.PubMed CentralView ArticlePubMedGoogle Scholar
- Siminovitch L, McCulloch EA, Till JE: The distribution of colony-forming cells among Spleen colonies. J Cell Physiol. 1963, 62: 327-336. 10.1002/jcp.1030620313.View ArticlePubMedGoogle Scholar
- Yoshida S, Ishikawa F, Kawano N, Shimoda K, Nagafuchi S, Shimoda S, Yasukawa M, Kanemaru T, Ishibashi H, Shultz LD, Harada M: Human cord blood–derived cells generate insulin-producing cells in vivo. Stem Cells. 2005, 23: 1409-1416. 10.1634/stemcells.2005-0079.View ArticlePubMedGoogle Scholar
- Hansson M, Tonning A, Frandsen U, Petri A, Rajagopal J, Englund MC, Heller RS, Hakansson J, Fleckner J, Skold HN, Melton D, Semb H, Serup P: Artifactual insulin release from differentiated embryonic stem cells. Diabetes. 2004, 53: 2603-2609. 10.2337/diabetes.53.10.2603.View ArticlePubMedGoogle Scholar
- Ryu S, Kodama S, Ryu K, Schoenfeld DA, Faustman DL: Reversal of established autoimmune diabetes by restoration of endogenous beta cell function. J Clin Invest. 2001, 108: 63-72.PubMed CentralView ArticlePubMedGoogle Scholar
- Shah R, Jindal RM: Reversal of diabetes in the rat by injection of hematopoietic stem cells infected with recombinant adeno-associated virus containing the preproinsulin II gene. Pancreatology. 2003, 3: 422-428. 10.1159/000073890.View ArticlePubMedGoogle Scholar
- Golosow N, Grobstein C: Epitheliomesenchymal interaction in pancreatic morphogenesis. Dev Biol. 1962, 4: 242-255. 10.1016/0012-1606(62)90042-8.View ArticlePubMedGoogle Scholar
- Rajagopal J, Anderson WJ, Kume S, Martinez OI, Melton DA: Insulin staining of ES cell progeny from insulin uptake. Science. 2003, 299: 363-PubMedGoogle Scholar
- Lopez-Talavera JC, Garcia-Ocana A, Sipula I, Takane KK, Cozar-Castellano I, Stewart AF: Hepatocyte growth factor gene therapy for pancreatic islets in diabetes: reducing the minimal islet transplant mass required in a glucocorticoid-free rat model of allogeneic portal vein islet transplantation. Endocrinology. 2004, 145: 467-474.View ArticlePubMedGoogle Scholar
- McEvoy RC, Hegre OD: Syngeneic transplantation of fetal rat pancreas. III. Effect of insulin treatment on the growth and differentiation of the pancreatic implants after reversal of diabetes. Diabetes. 1979, 28: 141-146. 10.2337/diabetes.28.2.141.View ArticlePubMedGoogle Scholar
- Chao KC, Chao KF, Fu YS, Liu SH: Islet-like clusters derived from mesenchymal stem cells in Wharton’s Jelly of the human umbilical cord for transplantation to control type 1 diabetes. PLoS One. 2008, 1: e1451-View ArticleGoogle Scholar
- Beattie GM, Lopez AD, Otonkoski T, Hayek A: Transplantation of human fetal pancreas: fresh vs. cultured fetal islets or ICCS. J Mol Med. 1999, 77: 70-73. 10.1007/s001090050304.View ArticlePubMedGoogle Scholar
- Soria B, Roche E, Berna G, Leon-Quinto T, Reig JA, Martin F: Insulin-secreting cells derived from embryonic stem cells normalize glycemia in streptozotocin-induced diabetic mice. Diabetes. 2000, 49: 157-162. 10.2337/diabetes.49.2.157.View ArticlePubMedGoogle Scholar
- Liu JC, Tseng HS, Chen CY, Chern MS, Chang CY: Percutaneous retrieval of 20 centrally dislodged Port-A catheter fragments. Clin Imaging. 2004, 28: 223-229. 10.1016/S0899-7071(03)00119-0.View ArticlePubMedGoogle Scholar
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