Time filter

Source Type

Jin Z.,The First Peoples Hospital of Kunming | Pan X.,Stem Cell Engineering Laboratory of Yunnan Province | Zhou K.,The First Peoples Hospital of Kunming | Bi H.,The First Peoples Hospital of Kunming | And 3 more authors.
Journal of International Medical Research | Year: 2015

Chronic obstructive pulmonary disease (COPD) is the most frequent chronic respiratory disease and a leading cause of morbidity and mortality, worldwide. Given that the foremost risk factor leading to the development of COPD is cigarette smoke, the initial treatment for COPD is smoking cessation. Even after smoking cessation, inflammation, apoptosis and oxidative stress can persist and continue to contribute to COPD. Although current therapies for COPD (which are primarily based on anti-inflammatory drugs such as corticosteroids, theophylline and bronchodilators) reduce airway obstruction, limit COPD exacerbation and improve the patient’s health-related quality-of-life, none can prevent disease progression or reduce mortality. Recent advances in stem cell research have provided novel insight into the potential of bone marrow mesenchymal stem cells (MSCs) in the treatment of several pulmonary diseases. This review article discusses the biological effects and mechanisms of action of MSC transplantation in COPD, and highlights the foundation that MSCs provide for novel therapeutic approaches in COPD. © The Author(s) 2015 Reprints and permissions: sagepub.co.uk/journalsPermissions.nav

Yin C.,Kunming General Hospital | Yin C.,Stem Cell Engineering Laboratory of Yunnan Province | Liang Y.,Kunming General Hospital | Guo S.,Kunming General Hospital | And 2 more authors.
Molecular Biology Reports | Year: 2014

Implantation of autologous bone marrow mononuclear cells (BM-MNCs) has been performed in ischemic tissues, for stimulation of angiogenesis, but the limited number of BM-MNCs in patients with hindlimb ischemia disease may offset their overall therapeutic efficacy. CCN1 is a novel and essential regulator during angiogenesis. We evaluated whether CCN1 and BM-MNC are capable of promoting angiogenesis in hindlimb ischemia. In this study, we created the rat model of hindlimb ischemia, and then the rats were randomly divided into four groups: CCN1 infusion plus BM-MNC transplantation (CCN1 + BM-MNCs group), CCN1 infusion plus PBS injection (CCN1 group), vehicle infusion plus BM-MNC transplantation (BM-MNCs group) and vehicle infusion plus PBS injection (control group). The combination of CCN1 and BM-MNC therapy could increase blood perfusion, capillary/muscle fiber ratio and tissue oxygenation in ischemic hindlimb. Moreover, CCN1 could not only inhibit the apoptosis of BM-MNCs, but also enhance the adhesiveness of BM-MNCs to HUVEC. Taken together, CCN1 enhanced angiogenesis of BM-MNC transplantation, and combining CCN1 with BM-MNC transplantation is a useful alternative for ischemic limbs. © 2014 Springer Science+Business Media.

Pang R.-Q.,Stem Cell Engineering Laboratory of Yunnan Province | He J.,Stem Cell Engineering Laboratory of Yunnan Province | Zhang Y.-Y.,Yunnan Agricultural University | Xiong F.,Sun Yat Sen University | And 9 more authors.
Cytotherapy | Year: 2014

Background aims: Embryonic-like stem cells (ELSCs) express embryonic stem cell-specific marker genes, such as SSEA-4, Oct-4 and Nanog, and can be induced to differentiate into cells of all 3 germ layers. Our preliminary data showed that ELSCs isolated from human bone marrow express multipotent antigen markers and differentiate into multinucleated myotube-like cells more efficiently than do mesenchymal stromal cells (MSCs) isolated from the same source. We investigated the therapeutic effect of ELSCs in dystrophin/utrophin double knock-out (dko) mice, one of the Duchenne muscular dystrophy animal models, by systemically transplanting them through tail-vein injection. Methods: ELSCs and MSCs were both isolated from human bone marrow. Two months after equal amounts of ELSCs or MSCs were injected through tail-vein injection, we evaluated skeletal muscle motor function and serum creatine kinase activity and measured dystrophin expression by means of immunostaining, Western blotting and semi-quantitative reverse transcriptase-polymerase chain reaction. Results: ELSCs positive for Oct-4 and Nanog-3 expressed higher levels of SSEA-4, FZD-9 and CD105 and were induced to differentiate into myotube-like cells more efficiently than did MSCs in vitro. Transplantation of ELSCs through the tail vein improved motor function and decreased serum creatine kinase activity at 2 months after cell transplantation. In addition, dystrophin protein and messenger RNA were upregulated and the skeletal muscle histology was improved in these dko mice transplanted with ELSCs. Conclusions: ELSCs could be more efficiently induced to differentiate into myotubes than were MSCs in vitro, and systematically transplanting ELSCs improved muscle motor function and muscle histology in dko mice. © 2014.

Hu M.-J.,Stem Cell Engineering Laboratory of Yunnan Province | Hu M.-J.,Kunming Medical University | Ruan G.-P.,Stem Cell Engineering Laboratory of Yunnan Province | Yao X.,Stem Cell Engineering Laboratory of Yunnan Province | And 7 more authors.
Cell Biology International | Year: 2013

We have examined the effects of induced autologous stem cells on blood sugar levels in a rabbit model of type 1 diabetes. Rabbit skin fibroblasts were induced to dedifferentiate into multipotent stem cells, and were transplanted into the treatment group via the pancreatic artery. After the fibroblasts had been induced for 72 h, some of them became multipotent stem cells. Four weeks after cell transplantation, blood glucose levels of the induced stem cell treatment group were significantly lower. The plasma insulin and plasma C-peptide levels of the treated group were significantly increased (P < 0.05). The shape and number of islets was different. In the control group, induced cell treatment group and non-induced cell treatment group. In the control group, islet β-cell nucleoli were obvious, and cell volumes were larger with more abundant cytoplasm. The rough endoplasmic reticulum was well-developed and a large number of secretory granules could be seen within the cytoplasm. In the induced cell treatment group, islet b cells were scattered, and their nuclei were oval and slightly irregular in shape. The cytoplasm of these cells contained a nearly normal number of secretory granules. In the non-induced cell treatment group, islet β-cells were atrophied and cell volumes were reduced. Cytoplasmic endocrine granules were significantly reduced or absent. In conclusion, treatment with induced multipotent stem cells can reduce blood sugar levels, improve islet cell function, and repair damaged pancreas in a rabbit model of type 1 diabetes. © 2013 International Federation for Cell Biology.

Pan X.-H.,Stem Cell Engineering Laboratory of Yunnan Province | Yang X.-Y.,Stem Cell Engineering Laboratory of Yunnan Province | Yang X.-Y.,Kunming Medical University | Yao X.,Stem Cell Engineering Laboratory of Yunnan Province | And 7 more authors.
Cell Biochemistry and Function | Year: 2014

Diabetic nephropathy (DN) is a common microvascular complication of diabetes. We used a new DN model in tree shrews to validate the use of bone-marrow mesenchymal stem cell (BM-MSC) transplantation to treat DN. The DN tree shrew model was established by a high-sugar and high-fat diet and four injections of streptozotocin. 4',6-Diamidino-2-phenylindole labelled BM-MSCs were injected into tree shrews. The DN tree shrew model was successfully established. Blood glucose was significantly increased (p<0.01) during the entire experiment. DN tree shrews showed dyslipidemia, insulin resistance and increased 24-h proteinuria. At 21days after BM-MSC transplantation, glucose and levels of triglycerides, total cholesterol and 24-h urine volume were lower than in tree shrews with DN alone (p<0.01) but were still higher than control values (p<0.01). Levels of creatinine and urea nitrogen as well as 24-h proteinuria were lower for DN tree shrews with BM-MSCs transplantation than DN alone (p<0.05). High-sugar and high-fat diet combined with STZ injection can induce a tree shrew model of DN. BM-MSCs injection can home to damaged kidneys and pancreas, for reduced 24-h proteinuria and improved insulin resistance. © 2014 John Wiley & Sons, Ltd.

Discover hidden collaborations