Hongchen Liu

Chinese PLA General Hospital (301 Hospital), Peping, Beijing, China

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Publications (34)61.4 Total impact

  • [Show abstract] [Hide abstract]
    ABSTRACT: Zinc finger protein, X-linked (ZFX) has been identified as a transcriptional factor and is implicated in the development of variant types of cancer. Furthermore, it has been reported that ZFX is essential for the survival and self-renewal of embryonic stem cells. To investigate the involvement of ZFX in squamous cell carcinoma of the tongue, in the present study, we explored the expression of ZFX in clinical specimens from patients with squamous cell carcinoma of the tongue and the correlation between ZFX expression and multiple clinical pathological parameters. We further evaluated the impact of ZFX knockdown on the proliferation, colony formation ability, cell cycle distribution and survival of two human tongue squamous cell carcinoma cell lines to explore its critical role in the development of squamous cell carcinoma of the tongue. Our results showed that ZFX expression was aberrantly higher in samples from patients with squamous cell carcinoma of the tongue and revealed that ZFX expression is positively correlated with tumor grade and stage. Consistent with these findings, we further found that ZFX knockdown impaired cell proliferation and colony formation ability and induced cell apoptosis and cell cycle arrest in two human tongue squamous cell carcinoma cell lines. Our results indicate that ZFX is essential for the development and progression of squamous cell carcinoma of the tongue and represents a potential target for the development of effective therapy.
    Oncology reports. 10/2014;
  • Lin Feng, E Lingling, Hongchen Liu
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    ABSTRACT: To evaluate the effects of autologous blood vessels and nerves on vascularization.
    Biomedical papers of the Medical Faculty of the University Palacky, Olomouc, Czechoslovakia 10/2014; · 0.99 Impact Factor
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    ABSTRACT: The pain caused by orthodontic treatment has been considered as tough problems in orthodontic practice. Danggui-shaoyao-san (DSS) is a traditional Chinese medicine (TCM) prescription which has long been used for pain treatment and possesses antioxidative, cognitive enhancing and antidepressant effects. We raise the hypothesis that DSS exerts analgesic effect for orthodontic pain via inhibiting the activations of neuron and microglia.
    Chinese medical journal. 10/2014; 127(20):3630-7.
  • Pan Ma, Baosheng Tan, Hongchen Liu, Junli Ma, Bin Gu
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    ABSTRACT: To explore the effect of glimepiride on the glucose uptake as well as glucose transporter (GLUT)-1 and GLUT-3 expression levels of rat mandibular osteoblasts in hyperglycemia.
    04/2014; 32(2):125-9.
  • Hong Guo, Yu Gao, Bin Gu, Jing Wang, Hongchen Liu
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    ABSTRACT: Objective To investigate the antiosteoporotic effects of L-Arginine on ovariectomied rats. Methods Forty twelve-week-old female Sprague-Dawley rats were randomly divided into four groups of bilaterally ovariectomy and one group of Sham animals, with 8 animals in each group. Twelve additional weeks elapsed before initiation of the treatment with L-Arginine in order to induce significant bone loss in the ovariectomied animals. A 4-week daily treatment (5 days a week, Monday–Friday) at doses of 5 mg/kg/d, 10 mg/kg/d, 20 mg/kg/d of L-Arginine or vehicle only was administered by s.c. injection to the ovariectomied groups respectively. At the end of the treatment period, blood samples from all animals were collected for biochemical analysis. Micro-computerized tomography analysis, histopathological study and biomechanical test were performed on the femur of each animal. Results Serum alkaline phosphatase and osteocalcin were reduced in ovariectomied rats after the administration of different dosage of L-Arginine. L-Arginine of 10 mg/kg showed the most significant effect. Micro-computerized tomography 3-D images revealed that the increase of bone mass in 5 mg/kg and 10 mg/kg groups were significant greater than that in Sham group. The biomechanical parameters of femur were improved significantly in L-Arginine 10 mg/kg group when compared to untreated ovariectomied rats. Conclusions L-Arginine (10 mg/kg) contributes significantly to the treatment of the bone loss induced by ovariectomy on rats, demonstrated by increased bone mass, improved bone structure and recovery of bone biomechanical activity.
    Biomedicine & Aging Pathology. 04/2014;
  • Bin Gu, Na Liu, Hongchen Liu
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    ABSTRACT: To observe the activity change of astrocyte in related nucleus caused by acute pulpitis in rats.
    Zhonghua yi xue za zhi. 04/2014; 94(16):1270-3.
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    ABSTRACT: Our previous studies demonstrated that glimepiride enhanced the proliferation and differentiation of osteoblasts and led to activation of the PI3K/Akt pathway. Recent genetic evidence shows that endothelial nitric oxide synthase (eNOS) plays an important role in bone homeostasis. In this study, we further elucidated the roles of eNOS, PI3K and Akt in bone formation by osteoblasts induced by glimepiride in a high glucose microenvironment. We demonstrated that high glucose (16.5 mM) inhibits the osteogenic differentiation potential and proliferation of rat osteoblasts. Glimepiride activated eNOS expression in rat osteoblasts cultured with two different concentrations of glucose. High glucose-induced osteogenic differentiation was significantly enhanced by glimepiride. Down-regulation of PI3K P85 levels by treatment with LY294002 (a PI3K inhibitor) led to suppression of P-eNOS and P-AKT expression levels, which in turn resulted in inhibition of RUNX2, OCN and ALP mRNA expression in osteoblasts induced by glimepiride at both glucose concentrations. ALP activity was partially inhibited by 10 µM LY294002. Taken together, our results demonstrate that glimepiride-induced osteogenic differentiation of osteoblasts occurs via eNOS activation and is dependent on the PI3K/Akt signaling pathway in a high glucose microenvironment.
    PLoS ONE 01/2014; 9(11):e112243. · 3.53 Impact Factor
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    ABSTRACT: Osteocyte generation can be used in bone defect repair; the generation efficiency needs to be further improved. This study aims to evaluate the role of ubiquitin A20 (A20) in facilitating the expression of osteocalcin in adipose-derived stem cells (ADSCs). In this study, adipose tissue was obtained from 10 healthy human subjects; ADSCs were isolated from the adipose samples. The ADSCs were transfected with core binding factor alpha 1 (Cbfa1) and/or insulin-like growth factor-1 receptor (IGF-1R). Expression of osteocalcin, A20 in ADSCs was assessed by quantitative RT-PCR (qRT-PCR) and Western blotting. Apoptosis of ADSCs was analyzed by flow cytometry. The results showed that after the gene transfection and stimulation of insulin, the ADSCs expressed high levels of osteocalcin. However, apoptotic ADSCs were induced by the activation of IGF-1R. Exposure to insulin down-regulated the expression of Bcl-xL and A20, and increased Bax, in ADSCs. The addition of exogenous A20 prevented the ADSC apoptosis. We conclude that activation of IGF-1R can induce apoptosis in ADSCs, which can be prevented by addition of exogenous A20.
    Biochemistry and Cell Biology 12/2013; 91(6):513-8. · 2.92 Impact Factor
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    ABSTRACT: Tissue engineering of bone has been increasingly used in the bone defect repair. To generate osteoblasts is a major approach, and here we have examined ways of improving the efficiency of producing osteoblasts. Adipose stem cells (ADSC) were prepared from rat mesentery tissue, and transfected with Cbfa1 gene vector or/and IGF-1R gene vector. The cells were stimulated with insulin. Osteocalcin expression by the ADSCs was assessed by quantitative RT-PCR (qRT-PCR), Western blotting and enzyme-linked immunobosorbent assay. Both genes Cbfa1 and IGF-1R were transfected in ADSCs, as shown by qRT-PCR and Western blotting. Stimulation by insulin in the culture increased osteocalcin expression in ADSCs transfected by both Cbfa1 and IGF-1R, but not in those transfected with only one of these two genes. Osteocalcin in the culture supernatant was also increased by stimulation with insulin. Thus IGF-1R gene transfer together with insulin stimulation can markedly increase the efficiency of generation of osteoblasts.
    Cell Biology International 06/2013; · 1.64 Impact Factor
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    ABSTRACT: Background: Endothelin-1(ET-1) is a 21-amino-acid peptide with multifunctional regulation. Initial research indicated that ET-1 is related to the inflammatory pathogenesis of periodontitis and involved in the regulation of cytokines, but the mechanisms involved remain unclear. The primary aim of this study was to investigate how ET-1 affects proinflammatory cytokine expression in human periodontal ligament (hPDL) cells. Methods: hPDL cells were obtained from both healthy (H-hPDL cells) and periodontitis-affected periodontal tissues (P-hPDL cells). The H-hPDL cells and P-hPDL cells were treated with ET-1 (1nM, 10nM, and 100nM) for 12, 24, and 48 hours(hrs). The untreated cells served as a normal control. To confirm the specificity of the ET-1 effects, we used 100nM of the specific endothelin A receptor(ETA) antagonist BQ123, and 100nM of the specific endothelin B receptor (ETB) antagonist BQ788 , as negative control. To examine the signaling pathways and molecular mechanisms involved in ET-1-mediated cytokine expression, The H-hPDL cells and P-hPDL cells were pre-treated with specific inhibitors for signal-regulated kinase (ERK1/2)(PD98059), c-Jun N-terminal kinase(JNK)(SP600125), and p38 kinase(SB203580) for 1 hrs before 100nM ET-1 stimulation. The tumour necrosis factor-alpha (TNF-α), interleukin(IL)-1β (IL-1β) and IL-6 mRNA and protein levels were evaluated by quantitative real-time PCR and ELISA, respectively. Results: ET-1 dose- and time- dependently induced the production of proinflammatory cytokines TNF-α, IL-1β, and IL-6 by H-hPDL cells and P-hPDL cells at both mRNA and protein levels. However, The ETA and ETB receptor antagonists inhibited the stimulatory effects of ET-1 on inflammatory cytokine expression in H-hPDL cells and P-hPDL cells. Furthermore, inhibitors of the Mitogen-activated protein kinases (MAPKs) significant reduced in ET-1-stimulated TNF-α, IL-1β, and IL-6 expression in H-hPDL cells and P-hPDL cells. Conclusion: ET-1 may be involved in the inflammatory process of periodontitis, at least in part, by stimulating proinflammatory cytokine production via MAPKs pathway in hPDL cells.
    Journal of Periodontology 05/2013; · 2.40 Impact Factor
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    ABSTRACT: Periodontitis is one of the main complications of diabetes mellitus and many researches have been done on the relationship between periodontitis and diabetes mellitus, but too much are still unclear, especially the mechanisms by which high glucose induces damage of periodontal ligament fibroblasts. So in this study, we investigated the effects of different concentration of high glucose on apoptosis in human periodontal ligament fibroblasts and the possible mechanisms involved. Human periodontal ligament fibroblasts were cultured and subjected to glucose of different concentration (5.5, 15, 25, and 35 mM) for 24 h. Apoptosis was studied by flow cytometry, caspase assays, fluorescent real-time PCR and Western blot. We also determined Fas/FasL expression was by Western blot. The application of different concentration of high glucose induced a concentration-dependent increase of apoptosis and the activity of caspase-3 in cultured human periodontal ligament fibroblasts. Furthermore, inhibitor of caspase-3 could prevent the high-glucose-induced apoptosis in human periodontal ligament fibroblasts. Protein levels of Fas and FasL remained unchanged. These data indicate that high glucose induces a concentration- and caspase-3-dependent increase of apoptosis in cultured human periodontal ligament fibroblasts in vitro. Activation of caspase-3 caused by high glucose is independent of Fas/FasL signaling pathways system. These results suggest a novel mechanism for the regulation of human periodontal ligament fibroblasts apoptosis by high glucose.
    Applied biochemistry and biotechnology 05/2013; · 1.94 Impact Factor
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    ABSTRACT: BACKGROUND: Craniofacial fibrous dysplasia (CFD) often requires surgery to correct facial deformity and prevent functional impairment. However, recurrence is common, and there is no reliable prognostic biomarker. The aim of this paper is to evaluate the possibility of using preoperative alkaline phosphatase (ALP) as a prognostic marker for CFD. MATERIAL AND METHODS: Forty-nine patients with CFD who underwent surgery from 2000 to 2011 were selected. The relationship between preoperative ALP and age, gender, lesion type and prognosis was investigated. RESULTS: The recurrence rate was 31.8% in patients who received conservative bone contouring. Patients with recurrence did not show significantly higher levels and abnormal rates of ALP than patients without recurrence. Young patients and those with polyostotic CFD showed higher ALP levels than adults and those with monostotic CPD (P < 0.05). Although CFD patients showed higher levels and abnormal rates of ALP than the control group, significant levels were not reached (P > 0.05). No correlation between age, gender, type, ALP and recurrence could be established using the logistic regression model. CONCLUSION: Preoperative ALP may not be a reliable prognostic marker of CFD based on the findings in this study. Close follow-up is recommended after conservative bone contouring.
    Journal of cranio-maxillo-facial surgery: official publication of the European Association for Cranio-Maxillo-Facial Surgery 02/2013; · 1.25 Impact Factor
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    ABSTRACT: To study the relationship between vascular endothelial growth factor (VEGF) and formation and repair of engineering bone, second-generation bone marrow stromal cells (BMSCs) of New Zealand white rabbits that were separated in vitro were transfected with VEGF 165 gene vectors by adenovirus to detect gene expressions. Transfected BMSCs and β-tricalcium phosphate material were complexed and implanted at the femoral injury sites of the study group (n = 12), and the control group (n = 12) were implanted with engineering bones that were not transfected with VEGF. Femoral recoveries of the two groups were observed on the 15th, 30th, 45th and 60th days, and their vascularization and ossification statuses were observed by immunohistochemical methods. The BMSCs transfected with VEGF highly expressed VEGF genes and excreted VEGF. The two groups both experienced increased vascularization and bone volume after implantation (t = 7.92, P<0.05), and the increases of the study group were significantly higher than those of the control group (t = 6.92, P<0.05). VEGF is clinically applicable because it can accelerate the formation and repair of engineering bone by promoting vascularization and ossification.
    PLoS ONE 01/2013; 8(12):e82945. · 3.53 Impact Factor
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    ABSTRACT: Dental implantation is an effective standard treatment modality to restore missing teeth and maxillofacial defects. However, in diabetics there is an increased risk for implant failure due to impaired peri-implant osseous healing. Early topical insulin treatment was recently shown to normalize diabetic bone healing by rectifying impairments in osteoblastic activities. In this study, insulin/poly(lactic-co-glycolic acid) (PLGA) microspheres were prepared by a double-emulsion solvent evaporation method. Microspheres were then incorporated in fibrin gel to develop a local drug delivery system for diabetic patients requiring implant treatment. In vitro release of insulin from fibrin gel loaded with these microspheres was assessed, and sustained prolonged insulin release over 21 days ascertained. To assess the bioactivity of released insulin and determine whether slow release might improve impaired diabetic bone formation, 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT), alkaline phosphatase (ALP) activity, mineralized nodule formation, and ELISA (enzyme-linked immunosorbent assay) assays were performed. The insulin released from the drug delivery system stimulated cell growth in previously inhibited cells, and ameliorated the impaired bone-forming ability of human MG-63 cells under high glucose conditions. Fibrin gel loaded with insulin/PLGA microspheres shows potential for improving peri-implant bone formation in diabetic patients.
    Science China. Life sciences 10/2012; · 2.02 Impact Factor
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    ABSTRACT: NEL-like molecule 1 (NELL1) is a potent osteogenic factor associated with craniosynostosis. Adenoviruses, the most commonly used viral vectors for gene therapy, have several disadvantages that may restrict osteogenesis. Previous studies have shown that lentiviruses can serve as ideal vectors for gene therapy for bone regeneration. In this study, two lentiviral vectors (LvNELL1 and LvBMP2) that encode human NELL1 and bone morphogenetic protein-2 (BMP2), respectively, were constructed. The effect of LvNELL1 infection on the proliferation, osteogenesis, and adipogenesis of human adipose-derived stem cells (hADSCs) in vitro was assessed and compared with that of LvBMP2. The results showed that hADSCs infected with LvNELL1 could efficiently and stably overexpress the target genes. 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay results demonstrated that LvBMP2, but not LvNELL1, enhanced the proliferation of hADSCs. Assessment of alkaline phosphatase activity and cellular mineralization indicated that LvNELL1 infection promoted the osteogenic differentiation of hADSCs, and the effect was comparable with that of LvBMP2. Real-time polymerase chain reaction (PCR) revealed that LvNELL1 infection upregulated OSX expression but not RUNX2 expression in hADSCs. In addition, adipogenic markers (lipid droplets, peroxisome proliferator-activating receptor γ, and lipoprotein lipase) analysis showed that LvNELL1 could dramatically inhibit the adipogenic differentiation of hADSCs, but LvBMP2 had no such effect. Taken together, these findings suggested that lentiviral-mediated NELL1 gene transfer in hADSCs may be a novel and promising approach to achieve effective and precise bone regeneration.
    Acta Biochimica et Biophysica Sinica 10/2012; 44(10):856-65. · 1.81 Impact Factor
  • Junli Ma, Limin Liang, Hongchen Liu
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    ABSTRACT: Ganglioneuromas (GNs) arising from neural crest sympathogonia are rare benign neurogenic tumors. The most commonly affected sites are the posterior mediastinum, the retroperitoneum and the adrenal gland. GNs often present as a solitary, painless and slow-growing mass, and multiple occurrences in the cervical region are extremely rare. Here, we report a case of massive multiple cervical GN in a 4-year-old girl, and review cases of cervical GN that have been reported in the past 10 years. The results demonstrated that cervical GN, compared to other sites, is seldom secretory. The signs and symptoms of cervical GN are unspecific; the ultimate diagnosis of GN depends on pathological examination. Fine-needle aspiration biopsy has limited value in diagnosis. Surgical excision is the treatment of choice and the prognosis is excellent even in cases where complete excision cannot be achieved. Furthermore, GNs should be considered in patients with multiple masses in the neck.
    Oncology letters 09/2012; 4(3):509-512. · 0.24 Impact Factor
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    ABSTRACT: The aim of this study was to determine whether local insulin delivery using a fibrin gel (FG) loaded with insulin/poly(lactic-co-glycolic acid) microspheres (FGIPM) improves the biomechanical retention of titanium implants in type 1 diabetic rats. Rats were divided randomly into 8 groups: a group of healthy rats (no treatment), a group of diabetic rats (no treatment), and 6 groups of diabetic rats treated locally using carriers containing or not containing insulin. Rats received implants in the tibia and were allowed to heal for 4 or 8 weeks. Removal torque tests (RTQ) were performed to evaluate the biomechanical retention of the implants. In the diabetic control group, the mean RTQ values were significantly decreased compared with those for the healthy group. The local application of FGIPM increased the RTQ values in diabetic rats to the values found in the healthy rats at 8 weeks. The FG-treated group presented statistically significant higher mean RTQ values than the diabetic rats receiving no treatment. Local insulin delivery using FGIPM ameliorated the biomechanical retention of titanium implants in type 1 diabetic rats and the FG had a beneficial effect.
    Journal of oral and maxillofacial surgery: official journal of the American Association of Oral and Maxillofacial Surgeons 08/2012; 70(10):2299-308. · 1.58 Impact Factor
  • Xuan Wu, Hongchen Liu, Lingling E, Zhenchun Li
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    ABSTRACT: To explore the expression of glucose transporter (GLUT)-1 and insulin receptor (IR) alpha1 in osteoblast obtained from diabetic rats' mandibles. The expression of GLUT-1 and IR alpha1 of diabetic and control groups were measured by reverse transcription polymerase chain reaction, Western blot and immunohistochemistry stain. The mRNA expressions of GLUT-1 and IR alpha1 of diabetic group were significantly higher than control group (P<0.05). The protein expressions of GLUT-1 and IR alpha1 were similar to the mRNA expressions. Osteoblasts obtained from diabetic rats' mandibles keep the adaptation changes to hyperglycemia and hypoinsulinemia, which may contribute to their dysfunction.
    Hua xi kou qiang yi xue za zhi = Huaxi kouqiang yixue zazhi = West China journal of stomatology 08/2011; 29(4):348-50, 354.
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    ABSTRACT: Background: Lack of osseointegration between a dental implant and the walls of the alveolar bone is a common problem in immediate implantation. Injectable tissue-engineered bone (ITB) may be an effective and minimally invasive solution to the problem. In this study, an injectable bone cement, nHAC/CSH, which consists of nano-hydroxyapatite/collagen (nHAC) and calcium sulfate hemihydrate (CaSO(4) .½H(2) O; CSH) was investigated as a tissue-engineered scaffold material with blood-acquired mesenchymal progenitor cells (BMPC) as seeding cells. Purpose: The aim of the study was to assess the new bone formation around immediate dental implants using nHAC/CSH loaded with dog blood-acquired mesenchymal progenitor cells (dBMPC) in a canine model. Materials and Methods: dBMPC were first isolated from peripheral blood of healthy adult dogs. Alizarin red and oil red O staining were then used to evaluate the potential of dBMPC to differentiate into bi-lineage mesenchymal tissues in vitro. Four healthy mongrel dogs were used in this study. The alveolar bone defects around immediate implants of dogs were created. Each defect was randomly assigned to one of the following three groups: (1) the ITB group (dBMPC + nHAC/CSH); (2) injectable bone cement nHAC/CSH; or (3) no materials (controls). Methylene blue staining was used to examine the bone formation after 3 months. Results: Studies in vitro revealed that dBMPC could be induced to osteoblasts and adipocytes. The ITB group (dBMPC + nHAC/CSH) showed significantly more bone-implant contact and bone density than either nHAC/CSH or control groups in the areas with peri-implant defects 3 months after implantation. Conclusion: The results indicate that the ITB composed of nHAC/CSH and dBMPC may represent a useful strategy for the clinical reconstruction of bone defects around immediate implantation. However, further investigation is needed involving the use of human BMPC as well as possible use of stem cells.
    Clinical Implant Dentistry and Related Research 07/2011; · 3.82 Impact Factor
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    ABSTRACT: Type I collagen was added to the composite chitosan solution in a ratio of 1:2 to build a physical cross-linked self-forming chitosan/collagen/β-GP hydrogel. Osteogenic properties of this novel injectable hydrogel were evaluated. Gelation time was about 8 min which offered enough time for handling a mixture containing cells and the subsequent injection. Scanning electronic microscopy (SEM) observations indicated good spreading of bone marrow mesenchymal stem cells (BMSCs) in this hydrogel scaffold. Mineral nodules were found in the dog-BMSCs inoculated hydrogel by SEM after 28 days. After subcutaneous injection into nude mouse dorsum for 4 weeks, partial bone formation was observed in the chitosan/collagen/β-GP hydrogel loaded with pre-osteodifferentiated dog-BMSCs, which indicated that chitosan/collagen/β-GP hydrogel composite could induce osteodifferentiation in BMSCs without exposure to a continual supply of external osteogenic factors. In conclusion, the novel chitosan/collagen/β-GP hydrogel composite should prove useful as a bone regeneration scaffold.
    Journal of Materials Science Materials in Medicine 07/2011; 22(9):2111-8. · 2.14 Impact Factor

Publication Stats

91 Citations
61.40 Total Impact Points


  • 2009–2014
    • Chinese PLA General Hospital (301 Hospital)
      Peping, Beijing, China
  • 2010–2013
    • 307 Hospital of the Chinese People's Liberation Army
      Peping, Beijing, China