Shuping Peng

Cancer Research Institute, New York, New York, United States

Are you Shuping Peng?

Claim your profile

Publications (79)203.95 Total impact

  • Cijun Shuai · Tingting Liu · Chengde Gao · Pei Feng · Tao Xiao · Kun Yu · Shuping Peng
    [Show abstract] [Hide abstract]
    ABSTRACT: Diopside (Di) is ideally suited for tissue engineering applications because of its good bioactivity and biocompatibility, while the low mechanical properties, such as strength and toughness, have hindered its application under load-bearing conditions. In this study, Di scaffolds fabricated by selective laser sintering (SLS) were reinforced with graphene nanoplatelets (GNPs). The mechanism of GNPs on mechanical properties of Di scaffolds was researched. The results showed that the compressive strength and fracture toughness of 1 wt % GNPs/Di scaffold were improved by 102% and 34%, respectively, compared with those of Di scaffold without GNPs. It may be ascribed to the uniform distribution of GNPs in the Di matrix and the grain refinement. Moreover, there exist crack bridging, crack deflection, crack branching and GNPs pullout mechanisms. Furthermore, continuous apatite layers were formed on the scaffolds in SBF solution and MG-63 cells presented good attachment and spreading on the scaffolds in vitro.
    No preview · Article · Jan 2016 · Journal of Alloys and Compounds
  • Anjie Min · Chao Zhu · Shuping Peng · Cijun Shuai · Lu Sun · Ying Han · Yunmei Qian · Shan Gao · Tong Su
    [Show abstract] [Hide abstract]
    ABSTRACT: It is well established that crosstalk between cancer-associated fibroblasts (CAFs) and cancer cells plays a critical role in the occurrence and development of oral squamous cell carcinoma (OSCC). The molecular mechanisms underlying such interaction, however, remain far from clear. Accumulating data have indicated that microRNAs involved in tumor microenvironment, particularly in CAFs, contribute to the activation of fibroblasts and metastasis of cancer cells. Here, we showed that miR-148a was downregulated in CAFs compared with normal fibroblasts isolated from clinical OSCC tissue. Investigation of miR-148a function in fibroblasts demonstrated that overexpression of miR-148a in CAFs significantly impaired the migration and invasion of oral carcinoma cells (SCC-25) by directly targeting WNT10B. Taken together, these data suggested that miR-148a might be a novel candidate target for the treatment of OSCC.
    No preview · Article · Dec 2015 · Journal of Biochemical and Molecular Toxicology
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Bone marrow-derived mesenchymal stem cells (BMSCs, also known as bone marrow-derived mesenchymal stromal cells) are known to be a component of the tumor microenvironment. BMSCs are multipotent stromal cells that can differentiate into a variety of cell types, including osteocytes, chondrocytes, adipocytes, epithelial cells and endothelial cells. Stem cells found in niches or transplanted into injured tissues constantly encounter hypoxic stress. Areas with very low to no oxygen pressure exist in solid tumors. The differentiation capacity of BMSCs under hypoxic conditions remains controversial. In this study, a hypoxic workstation, set at an oxygen concentration of 0.2% was used to mimic the hypoxic microenvironment of cancer in vivo. Oil red O staining and alkaline phosphatase staining were used to examine the adipogenic or osteogenic differentiation, respectively, of BMSCs. Real-time PCR was performed to explore the expression of adipocyte- or osteocyte-specific genes. An RT2 Profiler(TM) PCR Array was used to screen a panel of 84 genes associated with human adipogenesis in BMSCs under normal and hypoxic conditions. A dual-luciferase reporter assay and chromatin immunoprecipitation (ChIP) were applied to analyze promoter activity to evaluate the possible regulatory mechanism of adipocyte-specific gene expression. We found that this extreme hypoxia impaired osteogenic differentiation as indicated by the attenuation of alkaline phosphatase (ALP) activity and the reduced expression of osteogenic markers osteocalcin and osteopontin. Moreover, extreme hypoxia enhanced adipogenic differentiation, as indicated by the accumulation of lipid droplets and the expression of the adipocyte-specific genes leptin, LPL, CFD, PGAR and HIG2. In the extreme hypoxic conditions (0.2% oxygen), the overexpression of CCAAT enhancer-binding proteins (C/EBPs), especially C/EBPδ, and HIF-1A upregulated the promoter activities of adipocyte-specific genes such as leptin, CFD, HIG2, LPL, PGAR. In the present study, peroxisome proliferator-activated receptor-gamma (PPARγ) exerted a negative effect on the differentiation of BMSCs into adipocytes. In view of these findings, extreme hypoxia induced the adipogenic differentiation of BMSCs through HIF-1A and C/EBPs. These findings might provide clues regarding the roles of BMSCs in the cancer microenvironment.
    Preview · Article · Dec 2015 · Stem Cell Research & Therapy
  • [Show abstract] [Hide abstract]
    ABSTRACT: Diopside exhibits favorable potential for bone repair on account of the good mechanical performance, bioactivity and biocompatibility. In this paper, diopside scaffolds with high pore interconnectivity were successfully fabricated by laser three-dimensional (3D) printing. The microstructure and mechanical performance of the diopside scaffolds were studied. The experimental analysis indicated that diopside particles gradually fused together until a dense structure was built with an energy density increasing in the range between 2.4 and 4.8 J·mm-2. Meanwhile, compressive strength and fracture toughness increased gradually from 5.96 ± 0.88 MPa to 10.87 ± 0.55 MPa. However, mechanical properties decreased due to the appearance of voids when energy density were 5.4 and 6 J·mm-2. Simulated body fluid (SBF) tests showed that apatite crystals formed on the diopside scaffolds surface, and the apatite crystals increased with soaking time. Cell culture tests indicated the scaffolds supported the adhesion and growth of MG-63 cells. The study suggested that diopside scaffolds fabricated by laser 3D printing are promising candidates for bone tissue engineering. © 2015, Kauno Technologijos Universitetas. All rights reserved.
    No preview · Article · Nov 2015 · Materials Science
  • [Show abstract] [Hide abstract]
    ABSTRACT: The biological properties of porous poly (vinylidene fluoride) (PVDF) scaffolds fabricated by selective laser sintering were tailored through nano-sized 58s bioactive glass. The results showed that 58s bioactive glass distributed evenly in the PVDF matrix. There were some exposed particles on the surface which provided attachment sites for biological response. It was confirmed that the scaffolds had highly bioactivity by the formation of bone-like apatite in simulated body fluid. And the bone-like apatite became dense with the increase in 58s bioactive glass and culture time. Moreover, the scaffolds were suitable for cell adhesion and proliferation compared with the PVDF scaffolds without 58s bioactive glass. The research showed that the PVDF/58s bioactive glass scaffolds had latent application in bone tissue engineering.
    No preview · Article · Nov 2015 · Journal of Biomaterials Science Polymer Edition
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Calcium sulfate (CaSO4), as a promising tissue repair material, has been applied widely due to its outstanding bioabsorbability and osteoconduction. However, fast disintegration, insufficient mechanical strength and poor bioactivity have limited its further application. In the study, CaSO4 scaffolds fabricated by using selective laser sintering were improved by adding 45S5 bioglass. The 45S5 bioglass enhanced stability significantly due to the bond effect of glassy phase between the CaSO4 grains. After immersing for four days in simulated body fluid (SBF), the specimens with 45S5 bioglass could still retain its original shape compared as opposed to specimens without 45S5 bioglass who experienced disintegration. Meanwhile, its compressive strength and fracture toughness increased by 80% and 37%, respectively. Furthermore, the apatite layer was formed on the CaSO4 scaffolds with 45S5 bioglass in SBF, indicating good bioactivity of the scaffolds. In addition, the scaffolds showed good ability to support the osteoblast-like cell adhesion and proliferation.
    Preview · Article · Nov 2015 · Materials
  • Jinglin Liu · Chengde Gao · Pei Feng · Shuping Peng · Cijun Shuai
    [Show abstract] [Hide abstract]
    ABSTRACT: Nano-sized 58S bioactive glass (nano-58S) as the dispersed phase was added to β-tricalcium phosphate (β-TCP) to reinforce the mechanical properties, and then the β-TCP/nano-58S composite scaffolds were prepared via selective laser sintering (SLS). The effects of nano-58S on microstructure, mechanical properties, bioactivity, and biocompatibility of the composite scaffolds were evaluated. The results showed that nano-58S was homogeneously dispersed in the β-TCP matrix and the mechanical properties were gradually improved when the amount of nano-58S was no more than a certain value (15 wt.%). However, exceeding this value, nano-58S became the continuous phase and exhibited the brittleness of bioactive glass. Accordingly, the mechanical properties gradually decreased. The maximum fracture toughness and compressive strength were 1.347 ± 0.025 MPa · m1/2 and 18.2 ± 0.62 MPa, respectively. In vitro tests in the simulated body fluid (SBF) demonstrated that the apatite-like layer formed faster on the composite scaffolds than on the scaffold without nano-58S, indicating that the nano-58S glass could enhance the bioactivity of the composite scaffolds. The MG-63 cells culture experiment proved that nano-58S glass could further facilitate the growth of human osteoblastic cells.
    No preview · Article · Nov 2015 · Materials and Design
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Oral cancer, represented mainly by oral squamous cell carcinoma (OSCC), is the eighth most common type of human cancer worldwide. The number of new OSCC cases is increasing worldwide, especially in the low-income countries, and the prognosis remains poor in spite of recent advances in the diagnostic and therapeutic modalities. MicroRNAs (miRNAs), 18–25 nucleotides long noncoding RNA molecules, have recently gained significant attention as potential regulators and biomarkers for carcinogenesis. Recent data show that several miRNAs are deregulated in OSCC, and they have either a tumor suppressive or an oncogenic role in oral carcinogenesis. This review summarizes current knowledge on the role of miRNAs as tumor promotors or tumor suppressors in OSCC development and discusses their potential value as diagnostic and prognostic markers in OSCC.
    Preview · Article · Oct 2015
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Breast cancer has become the leading cause of cancer-related death among women. A large number of patients become resistant to drug chemotherapy. Paclitaxel (Taxol) is an effective chemotherapeutic agent used to treat cancer patients. Taxol has been widely used in human malignancies including breast cancer because it can stabilize microtubules resulting in cell death by causing an arrest during the G2/M phase of the cell cycle. Pro-apoptotic Bcl-2 antagonist killer 1 (Bak) plays an important role in Taxol-induced apoptosis in breast cancer. In our present study, we investigated the expression of the Bak protein and clinicopathological correlations in a large sample of breast cancer tissues by immunohistochemistry. We found that the percentage of high scores of Bak expression in breast cancer was significantly lower than that of the non-cancerous breast control tissue. In addition, lower Bak expression was positively associated with the clinical TNM stage of breast cancer with a significant decrease in overall survival compared with those with higher Bak expression especially in the Luminal and HER2 subtypes. Importantly, higher Bak expression predicted a favorable clinical outcome in the cases treated with Taxol indicated by a higher overall survival than that of patients with lower Bak expression especially in Luminal and HER2 subtypes. Furthermore, these results were confirmed in vitro since overexpression of Bak sensitized breast cancer cells to Taxol by inhibiting proliferation and promoting apoptosis; in contrast, downregulation of Bak through siRNA transfection inhibited Taxol induced-apoptosis. Therefore, our results demonstrate that Bak acts as a sensitive biomarker and favorable prognostic factor for Taxol treatment in breast cancer. The restoration of Bak expression would be therapeutically beneficial for Taxol resistant breast cancer patients.
    Preview · Article · Sep 2015 · PLoS ONE
  • [Show abstract] [Hide abstract]
    ABSTRACT: Gastric cancer is an aggressive disease that continues to have a daunting impact on global health. Fra-1 (FOSL1) plays important roles in oncogenesis in various malignancies. We investigated the expression of Fra-1 in gastric cancer (GC) tissues by qPCR, immunohistochemistry (IHC) and western blot technologies. The results showed that Fra-1 was overexpressed in gastric cancer tissues compared with the adjacent non‑cancerous tissues. To explore the possible mechanism of Fra-1 in GC, we elucidated the effect of Fra-1 in the apoptosis and cell cycle of gastric cancer cells, AGS, and found that a considerable decrease in apoptotic cells and increase of S phase rate were observed for AGS cells with Fra-1 overexpession. We identified and confirmed that Fra-1 affected the expression level of CTTN and EZR in vitro through LC-MS/MS analyses and western blot technology. Furthermore, we found that Fra-1 was correlated with dysregulation PI3K/Akt and p53 signaling pathway in gastric cancer tissues in vitro. Moreover, we found that Fra-1 overexpression affected the expression of PI3K, Akt, MDM2 and p53 in vivo. In summary, our results suggest that Fra-1 is upregulated in gastric cancer tissues and plays its function by affecting the PI3K/Akt and p53 signaling pathway in gastric cancer.
    No preview · Article · Sep 2015 · International Journal of Oncology
  • [Show abstract] [Hide abstract]
    ABSTRACT: Cluster of differentiation 90 (CD90) (Thy-1) plays important roles in the oncogenesis in various types of malignancies. In the present study, we investigated the expression of CD90 in gastric cancer (GC) tissues by q-PCR, immunohistochemistry (IHC), and western blot technologies. The results showed that CD90 was overexpressed in gastric cancer tissues compared with the level in the adjacent non‑cancerous tissues. To explore the possible mechanism of CD90 in GC, we elucidated the effect of CD90 on the apoptosis of AGS gastric cancer cells, and found that a considerable decrease in apoptotic cells was observed for AGS cells with CD90 overexpression. Meanwhile, the rate of apoptotic cells was increased in the AGS cells with CD90 interference (siCD90) compared with that in the AGS cells. Cell apoptosis is closely related to a reduction in mitochondrial membrane potential (ΔΨm) and an increase in intracellular reactive oxygen species (ROS) and calcium ion (Ca2+) concentrations. Our results showed that overexpression of CD90 in the AGS gastric cancer cells led to an increase in ΔΨm and a decrease in intracellular ROS and Ca2+ concentrations. At the same time, siCD90 reduced ΔΨm and the increase in intracellular ROS and Ca2+ concentrations. Furthermore, we identified and confirmed that CD90 functions by modulating the expression level of secreted protein, acidic, cysteine‑rich (osteonectin) (SPARC) in vitro through LC‑MS/MS analyses and western blot technology. In summary, our results suggest that CD90 is upregulated in gastric cancer and inhibits gastric cancer cell apoptosis by modulating the expression level of SPARC protein.
    No preview · Article · Sep 2015 · Oncology Reports
  • [Show abstract] [Hide abstract]
    ABSTRACT: Long noncoding RNAs (lncRNAs) have emerged as a major regulator of cancer. Significant fraction of lncRNAs is represented on widely used microarray platforms; however, many of which have no known function. To discover novel lung cancer-related lncRNAs, we analyzed the lncRNA expression patterns in five sets of previously published lung cancer gene expression profile data that were represented on Affymetrix HG-U133 Plus 2.0 array, and identified dysregulated lncRNAs in lung cancer. One lncRNA, actin filament associated protein 1 antisense RNA1 (AFAP1-AS1), was the most significantly upregulated in lung cancer and associated with poor prognosis. In vitro experiments demonstrated that AFAP1-AS1 knockdown significantly inhibited the cell invasive and migration capability in lung cancer cells. AFAP1-AS1 knockdown also increased the expression of its antisense protein coding gene, actin filament associated protein 1 (AFAP1), and affected the expression levels of several small GTPase family members and molecules in the actin cytokeratin signaling pathway, which suggested that AFAP1-AS1 promoted cancer cell metastasis via regulation of actin filament integrity. Our findings extend the number of noncoding RNAs functionally implicated in lung cancer progression and highlight the role of AFAP1-AS1 as potential prognostic biomarker and therapeutic target of lung cancer.
    No preview · Article · Aug 2015 · Tumor Biology
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Polyglycolide (PGA) is considered an attractive candidate for bone regeneration because of its good biodegradability as well as biocompatibility. However, its insufficient mechanical strength and inadequate bioactivity limit the applications. In this research, diopside (DIOP) was incorporated into PGA scaffolds for enhancing mechanical and biological properties. The porous scaffolds were fabricated via selective laser sintering (SLS). The effect of DIOP content on the microstructure, mechanical properties, bioactivity as well as cytocompatibility of the porous scaffolds was studied. The results showed that DIOP particles were homogenously distributed within the PGA matrix, which contained up to 10 wt%. This led to an improvement of 171.2% in compressive strength and 46.2% in compressive modulus. In vitro studies demonstrated that the highest apatite forming ability was obtained on the scaffolds surface with the highest amount of DIOP after soaking in simulated body fluid (SBF), suggesting the bioactivity of the scaffolds increased with increasing DIOP. In addition, a cytocompatibility study showed that the scaffolds exhibited a higher degree of cells attachment, growth as well as differentiation than the pure PGA scaffolds. These indicated that the PGA scaffolds modified with DIOP possessed the suitable properties, which could be used for bone tissue regeneration
    Full-text · Article · Jun 2015 · RSC Advances
  • Jianhua Zhou · Chengde Gao · Pei Feng · Tao Xiao · Cijun Shuai · Shuping Peng
    [Show abstract] [Hide abstract]
    ABSTRACT: The calcium sulfate (CaSO4) bone scaffolds with high porosity and interconnectivity and controllable pore size were prepared by using selective laser sintering. The phase composition, micro morphology and biocompatibility were investigated by using X-ray diffraction, scanning electron microscopy and microculture tetrazolium test. The results showed that the CaSO4 powders fused better and a more compact structure was built due to the decrease of holes in the scaffold at laser power of 7 W compared with 6 W or lower. At this time, both compressive strength and fracture toughness were optimal. While CaSO4 decomposed and resulted in the mechanical properties decreasing when laser power further increased. Consequently, the mechanical properties of the scaffolds decreased. Moreover, the osteoblast-like cells attached on the scaffolds were obtained by cell culture in vitro. The results revealed that the cells could adhere and grow well on the scaffolds.
    No preview · Article · Jun 2015 · Journal of Porous Materials
  • Source
    Jinglin Liu · Chengde Gao · Pei Feng · Tao Xiao · Cijun Shuai · Shuping Peng
    [Show abstract] [Hide abstract]
    ABSTRACT: Bioactive glasses have wide application prospects in bone replacement and regeneration owing to the unique osteoconductivity and osteostimulativity. However, the high brittleness and poor compressive strength limit their applications in load-bearing positions. In this study, multi-wall carbon nanotubes (CNTs) were used to toughen bioactive glass (13-93 glass), and their nanocomposite scaffolds were fabricated by selective laser sintering. The effect of CNTs amount (1-5 wt.%) on mechanical properties of the scaffolds was investigated. The results showed that CNTs were effective to improve the mechanical properties of the nanocomposite scaffolds by virtue of the toughening mechanisms of bridging, pull-out and crack deflection. The optimum compressive strength and fracture toughness reached to 37.32 MPa and 1.58 MPa·m1/2, respectively, by adding the appropriate amount of CNTs (3 wt.%). In addition, the bone-like hydroxycarbonate apatite (HCA) layer was formed on the surface of the nanocomposite scaffolds after immersion in simulated body fluid (SBF) for 10 days. And the cell culture test showed that the scaffolds should have good cytocompatibility. The research indicated that the 13-93 glass-CNTs nanocomposites scaffolds are promising candidates for bone tissue engineering applications.
    Preview · Article · Jun 2015 · Journal of the Ceramic Society of Japan
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Porous poly(vinylidene fluoride) (PVDF) scaffolds were prepared by selective laser sintering. The effects of laser energy density, ranging from 0.66 to 2.16 J/mm2, on microstructure and mechanical properties were investigated. At low energy density levels, PVDF particles could fuse well and the structure becomes dense with the increase of the energy density. Smoke and defects (such as holes) were observed when the energy density increased above 1.56 J/mm2 which indicated decomposition of the PVDF powder. The scaffolds appeared to be light yellow and there was a reduction in tensile strength. The fabricated scaffolds were immersed into simulated body fluid for different time to evaluate biostability. In addition, MG63 cells were seeded and cultured for different days on the scaffolds. The testing results showed that the cells grew and spread well, indicating that PVDF scaffolds had good biocompatibility.
    Full-text · Article · May 2015 · International Journal of Polymer Science
  • Cijun Shuai · Zikai Han · Pei Feng · Chengde Gao · Tao Xiao · Shuping Peng
    [Show abstract] [Hide abstract]
    ABSTRACT: Akermanite (AKM) is considered to be a promising bioactive material for bone tissue engineering due to the moderate biodegradability and excellent biocompatibility. However, the major disadvantage of AKM is the relatively inadequate fracture toughness, which hinders the further applications. In the study, boron nitride nanosheets (BNNSs) reinforced AKM scaffolds are fabricated by selective laser sintering. The effects of BNNSs on the mechanical properties and microstructure are investigated. The results show that the compressive strength and fracture toughness increase significantly with BNNSs increasing from 0.5 to 1.0 wt%. The remarkable improvement is ascribed to pull out and grain wrapping of BNNSs with AKM matrix. While, overlapping sheets is observed when more BNNSs are added, which results in the decline of mechanical properties. In addition, it is found that the composite scaffolds possess good apatite-formation ability when soaking in simulated body fluids, which have been confirmed by energy dispersed spectroscopy and flourier transform infrared spectroscopy. Moreover, MG63 osteoblast-like cells and human bone marrow stromal cells are seeded on the scaffolds. Scanning electron microscopy analysis confirms that both cells adhere and proliferate well, indicating favorable cytocompatibility. All the facts demonstrate the AKM scaffolds reinforced by BNNSs have potential applications for tissue engineering.
    No preview · Article · May 2015 · Journal of Materials Science Materials in Medicine
  • Source
    Chengde Gao · Pingpin Wei · Pei Feng · Tao Xiao · Cijun Shuai · Shuping Peng
    [Show abstract] [Hide abstract]
    ABSTRACT: Nano SiO2 and MgO particles were incorporated into β-tricalcium phosphate (β-TCP) scaffolds to improve the mechanical and biological properties. The porous cylindrical β-TCP scaffolds doped with 0.5 wt % SiO2, 1.0 wt % MgO, 0.5 wt % SiO2 + 1.0 wt % MgO were fabricated via selective laser sintering respectively and undoped β-TCP scaffold was also prepared as control. The phase composition and mechanical strength of the scaffolds were evaluated. X-ray diffraction analysis indicated that the phase transformation from β-TCP to α-TCP was inhibited after the addition of MgO. The compressive strength of scaffold was improved from 3.12 ± 0.36 MPa (β-TCP) to 5.74 ± 0.62 MPa (β-TCP/SiO2), 9.02 ± 0.55 MPa (β-TCP/MgO) and 10.43 ± 0.28 MPa (β-TCP/SiO2/MgO), respectively. The weight loss and apatite-forming ability of the scaffolds were evaluated by soaking them in simulated body fluid. The results demonstrated that both SiO2 and MgO dopings slowed down the degradation rate and improved the bioactivity of β-TCP scaffolds. In vitro cell culture studies indicated that SiO2 and MgO dopings facilitated cell attachment and proliferation. Combined addition of SiO2 and MgO were found optimal in enhancing both the mechanical and biological properties of β-TCP scaffold.
    Full-text · Article · Apr 2015 · International Journal of Molecular Sciences
  • Source
    Cijun Shuai · Yiyuan Cao · Chengde Gao · Pei Feng · Tao Xiao · Shuping Peng
    [Show abstract] [Hide abstract]
    ABSTRACT: Bioactive glass (BG) is widely used for bone tissue engineering. However, poor mechanical properties are the major shortcomings. In the study, hydroxyapatite nanowhisker (HANw) was used as a reinforcement to improve the mechanical properties. 63s glass/HANw scaffolds were successfully fabricated by selective laser sintering (SLS). It was found that the optimal compressive strength and fracture toughness were achieved when 10 wt.% HANw was added. This led to 36% increase in compressive strength and 83% increase in fracture toughness, respectively, compared with pure 63s glass scaffolds. Different reinforcement mechanisms were analyzed based on the microstructure investigation. Whisker bridging and whisker pulling-out were efficient in absorbing crack propagating energy, resulting in the improvement of the mechanical properties. Moreover, bioactivity and biocompatibility of the scaffolds were evaluated in vitro. The results showed that composite scaffolds with 10 wt.% HANw exhibited good apatite-forming ability and cellular affinity.
    Full-text · Article · Mar 2015
  • Source
    Cijun Shuai · Pei Feng · Chengde Gao · Xiong Shuai · Tao Xiao · Shuping Peng
    [Show abstract] [Hide abstract]
    ABSTRACT: In this study, graphene oxide (GO) is incorporated into poly (vinyl alcohol) (PVA) for the purpose of improving the mechanical properties. Nanocomposite scaffolds with an interconnected porous structure are fabricated by selective laser sintering (SLS). The results indicate that the highest improvements in mechanical properties are obtained, that is, a 60%, 152% and 69% improvement of compressive strength, Young’s modulus and tensile strength is achieved at the GO loading of 2.5 wt%, respectively. The reason can be attributed to the enhanced load transfer due to the homogeneous dispersion of GO sheets and the strong hydrogen bonding interactions between GO and PVA matrix. While the agglomerates and restacking of GO sheets occur with further increasing the GO loading, which leads to the decreasing in mechanical properties. In addition, osteoblast-like cells attach and grow well on the surface of scaffolds, and proliferate with increasing time of culture. The GO/PVA nanocomposite scaffolds are potential candidates for bone tissue engineering.
    Full-text · Article · Mar 2015 · RSC Advances

Publication Stats

509 Citations
203.95 Total Impact Points


  • 2006-2015
    • Cancer Research Institute
      New York, New York, United States
  • 2005-2015
    • Central South University
      • • Cancer Research Institute
      • • State Key Laboratory of High-performance Complex Manufacturing
      • • Key Laboratory of Modern Complex Equipment Design and Extreme Manufacturing
      Ch’ang-sha-shih, Hunan, China
  • 2014
    • Yale-New Haven Hospital
      New Haven, Connecticut, United States
  • 2013-2014
    • Medical University of South Carolina
      • Department of Regenerative Medicine and Cell Biology
      Charleston, South Carolina, United States
  • 2010-2014
    • Yale University
      • Department of Obstetrics, Gynecology and Reproductive Sciences
      New Haven, Connecticut, United States