51
|
Long T, Guo YP, Tang S, Guo YJ, Zhu ZA. Emulsion fabrication of magnetic mesoporous carbonated hydroxyapatite microspheres for treatment of bone infection. RSC Adv 2014. [DOI: 10.1039/c3ra45896b] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
|
52
|
Lang WZ, Hu CL, Chu LF, Guo YJ. Hydrothermally prepared chromia-alumina (xCr/Al2O3) catalysts with hierarchical structure for propane dehydrogenation. RSC Adv 2014. [DOI: 10.1039/c4ra06277a] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Propane dehydrogenation was investigated over a series of chromia-alumina (xCr/Al2O3) catalysts containing 2.5–10 wt% chromium (Cr), synthesizedviaa hydrothermal synthesis method.
Collapse
|
53
|
Chen W, Long T, Guo YJ, Zhu ZA, Guo YP. Hydrothermal synthesis of hydroxyapatite coatings with oriented nanorod arrays. RSC Adv 2014. [DOI: 10.1039/c3ra43664k] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
|
54
|
Chen W, Long T, Guo YJ, Zhu ZA, Guo YP. Magnetic hydroxyapatite coatings with oriented nanorod arrays: hydrothermal synthesis, structure and biocompatibility. J Mater Chem B 2014; 2:1653-1660. [DOI: 10.1039/c3tb21769h] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
|
55
|
Guo YP, Long T, Tang S, Guo YJ, Zhu ZA. Hydrothermal fabrication of magnetic mesoporous carbonated hydroxyapatite microspheres: biocompatibility, osteoinductivity, drug delivery property and bactericidal property. J Mater Chem B 2014; 2:2899-2909. [DOI: 10.1039/c3tb21829e] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
56
|
Guo YJ, Liu GZ, Wang CM, Wang YY, Li HJ, Zhong K, Lu WF, Wang YL, Yang GY. Molecular cloning and expression of the porcine S14R gene in Escherichia coli. GENETICS AND MOLECULAR RESEARCH 2013; 12:4405-12. [PMID: 24222220 DOI: 10.4238/2013.october.10.6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
We amplified S14R protein gene cDNA of porcine, cloned it into a prokaryotic expression plasmid, and expressed it in Escherichia coli. A pair of primers was designed based on the cDNA sequence of the porcine S14R gene in GenBank. The target gene fragment from porcine liver tissue was amplified by RT-PCR. Confirmed by auto-sequencing, the target gene fragment was subcloned into an expression vector of pET28a. The pET28a-S14R construct was subsequently transformed into E. coli BL21 (DE3). This construct was verified by restriction endonuclease digestion and sequencing. Using isopropyl β-D-1-thiogalactopyranoside induction, a new recombinant protein with the expected relative molecular mass of 24 kDa appeared. The result was identified by SDS-PAGE electrophoresis. Porcine S14R includes 549bp (GenBank No. JN793537), with an open reading frame of 549 bp coding 182 amino acids.
Collapse
|
57
|
Huang A, Zhang B, Wang B, Zhang F, Fan KX, Guo YJ. Increased CD14(+)HLA-DR (-/low) myeloid-derived suppressor cells correlate with extrathoracic metastasis and poor response to chemotherapy in non-small cell lung cancer patients. Cancer Immunol Immunother 2013; 62:1439-51. [PMID: 23760662 PMCID: PMC11028777 DOI: 10.1007/s00262-013-1450-6] [Citation(s) in RCA: 166] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2013] [Accepted: 06/04/2013] [Indexed: 01/21/2023]
Abstract
Accumulating evidence has demonstrated that myeloid-derived suppressor cells (MDSCs), a heterogeneous population of cells, play an important role in the subversion, inhibition, and downregulation of the immune response to cancer. However, the characteristics of these cells, particularly clinical relevance, in malignant tumors remain unclear due to a lack of specific markers. In this study, we characterized peripheral CD14(+)HLA-DR(-/low) cells, a new human MDSC subpopulation, in 89 patients with non-small cell lung cancer (NSCLC). As expected, both frequency and absolute number of CD14(+)HLA-DR(-/low) cells were significantly increased in the peripheral blood of NSCLC patients compared with that of the healthy controls and indicated an association with metastasis, response to chemotherapy, and progression-free survival. These cells showed decreased expression of CD16 and CD86 compared with HLA-DR(+) monocytes. Unlike classical monocytes, these populations showed significantly decreased allostimulatory activity and showed the ability to inhibit autologous T cell proliferation and IFN-γ production in a cell-contact-dependent manner. Furthermore, we demonstrated that CD14(+)HLA-DR(-/low) cells expressed the NADPH oxidase component gp91(phox) and generated high level of reactive oxygen species (ROS). Moreover, inactivation of ROS reversed their immunosuppressive capacity on T cell response. These results prove, for the first time, the existence of ROS-producing CD14(+)HLA-DR(-/low) myeloid-derived suppressor cells in NSCLC patients, which mediate tumor immunosuppression and might thus represent a potential target for therapeutic intervention.
Collapse
|
58
|
Guo YJ, Wang YY, Chen T, Wei YT, Chu LF, Guo YP. Hollow carbonated hydroxyapatite microspheres with mesoporous structure: Hydrothermal fabrication and drug delivery property. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2013; 33:3166-72. [DOI: 10.1016/j.msec.2013.03.040] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2012] [Revised: 03/03/2013] [Accepted: 03/23/2013] [Indexed: 10/27/2022]
|
59
|
Ma FM, Guo YJ. Determination of the Attitudinal Character by Self-Evaluation for the Maximum Entropy OWA Approach. INT J INTELL SYST 2013. [DOI: 10.1002/int.21618] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
60
|
Guo YJ, Long T, Chen W, Ning CQ, Zhu ZA, Guo YP. Bactericidal property and biocompatibility of gentamicin-loaded mesoporous carbonated hydroxyapatite microspheres. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2013; 33:3583-91. [PMID: 23910253 DOI: 10.1016/j.msec.2013.04.021] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2012] [Revised: 03/20/2013] [Accepted: 04/08/2013] [Indexed: 01/27/2023]
Abstract
Implant-associated infection is a serious problem in orthopaedic surgery. One of the most effective ways is to introduce a controlled antibiotics delivery system into the bone filling materials, achieving sustained release of antibiotics in the local sites of bone defects. In the present work, mesoporous carbonated hydroxyapatite microspheres (MCHMs) loaded with gentamicin have been fabricated according to the following stages: (i) the preparation of the MCHMs by hydrothermal method using calcium carbonate microspheres as sacrificial templates, and (ii) loading gentamicin into the MCHMs. The MCHMs exhibit the 3D hierarchical nanostructures constructed by nanoplates as building blocks with mesopores and macropores, which make them have the higher drug loading efficiency of 70-75% than the conventional hydroxyapatite particles (HAPs) of 20-25%. The gentamicin-loaded MCHMs display the sustained drug release property, and the controlled release of gentamicin can minimize significantly bacterial adhesion and prevent biofilm formation against S. epidermidis. The biocompatibility tests by using human bone marrow stromal cells (hBMSCs) as cell models indicate that the gentamicin-loaded MCHMs have as excellent biocompatibility as the HAPs, and the dose of the released gentamicin from the MCHMs has no toxic effects on the hBMSCs. Hence, the gentamicin-loaded MCHMs can be served as a simple, non-toxic and controlled drug delivery system to treat bone infections.
Collapse
|
61
|
Guo YJ, Deng GF, Xu XR, Wu S, Li S, Xia EQ, Li F, Chen F, Ling WH, Li HB. Antioxidant capacities, phenolic compounds and polysaccharide contents of 49 edible macro-fungi. Food Funct 2013; 3:1195-205. [PMID: 22868715 DOI: 10.1039/c2fo30110e] [Citation(s) in RCA: 97] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Edible macro-fungi are widely consumed as food sources for their flavors and culinary features. In order to explore the potential of macro-fungi as a natural resource of bioactive compounds, the antioxidant properties and polysaccharide contents of 49 edible macro-fungi from China were evaluated systematically. A positive correlation between antioxidant capacity and total phenolic content indicated that phenolic compounds could be main contributors of antioxidant capacities of these macro-fungi. Furthermore, many bioactive compounds such as gallic, homogentisic, protocatechuic, and p-hydroxybenzoic acid were identified and quantified. The macro-fungi species Thelephora ganbajun Zang, Boletus edulis Bull., Volvariella volvacea Sing, Boletus regius Krombh, and Suillus bovinus Kuntze displayed the highest antioxidant capacities and total phenolic contents, indicating their potential as important dietary sources of natural antioxidants.
Collapse
|
62
|
Lang WZ, Shen JP, Zhang YX, Yu YH, Guo YJ, Liu CX. Preparation and characterizations of charged poly(vinyl butyral) hollow fiber ultrafiltration membranes with perfluorosulfonic acid as additive. J Memb Sci 2013. [DOI: 10.1016/j.memsci.2012.10.039] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
63
|
Lang WZ, Niu HY, Liu YX, Liu CX, Guo YJ. Pervaporation separation of dimethyl carbonate/methanol mixtures with regenerated perfluoro-ion-exchange membranes in chlor-alkali industry. J Appl Polym Sci 2013. [DOI: 10.1002/app.39100] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
64
|
Yang TK, Huang KH, Chen SC, Chang HC, Yang HJ, Guo YJ. Correlation between clinical manifestations of nocturnal enuresis and attentional performance in children with attention deficit hyperactivity disorder (ADHD). J Formos Med Assoc 2013; 112:41-7. [DOI: 10.1016/j.jfma.2012.01.019] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2011] [Revised: 01/14/2012] [Accepted: 01/16/2012] [Indexed: 11/29/2022] Open
|
65
|
Deng GF, Xu XR, Guo YJ, Xia EQ, Li S, Wu S, Chen F, Ling WH, Li HB. Determination of antioxidant property and their lipophilic and hydrophilic phenolic contents in cereal grains. J Funct Foods 2012. [DOI: 10.1016/j.jff.2012.06.008] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
|
66
|
|
67
|
Xia EQ, Yu YY, Xu XR, Deng GF, Guo YJ, Li HB. Ultrasound-assisted extraction of oleanolic acid and ursolic acid from Ligustrum lucidum Ait. ULTRASONICS SONOCHEMISTRY 2012; 19:772-6. [PMID: 22197019 DOI: 10.1016/j.ultsonch.2011.11.014] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2011] [Revised: 09/27/2011] [Accepted: 11/13/2011] [Indexed: 05/31/2023]
Abstract
Oleanolic acid and ursolic acid are the main bioactive compounds in fruit of Ligustrum lucidum Ait, which possess anti-inflammatory, antioxidative, antiprotozoal, antimutagenic and anticancer properties. In this study, the ultrasound-assisted extraction of oleanolic acid and ursolic acid from L. lucidum Ait was investigated with HPLC-photodiode array detection. Effects of several experimental parameters, such as type and concentration of extraction solvent, ratio of liquid to material, extraction temperature and extraction time, on extraction efficiencies of oleanolic acid and ursolic acid from L. lucidum were evaluated. The influence of experimental parameters on extraction efficiency of ursolic acid was more significant than that of oleanolic acid. The optimal extraction conditions were 95% ethanol, the ratio of material to liquid at 1:20, and extraction for 10 min at 40°C under ultrasonic irradiation. Under the optimal conditions, the yields of oleanolic acid and ursolic acid were 6.3 ± 0.25 and 9.8 ± 0.30 mg/g, respectively. The results indicated that the ultrasound-assisted extraction is a very useful method for the extraction of oleanolic acid and ursolic acid from L. lucidum.
Collapse
|
68
|
Chen YF, Huang WY, Chen SC, Guo YJ, Lan CF, Liu SH, Huang KH. Factors associated with delayed pediatric hypospadias surgery in Taiwan: a population-based, nationwide analysis. J Formos Med Assoc 2012; 112:48-53. [PMID: 23332429 DOI: 10.1016/j.jfma.2012.02.014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2011] [Revised: 02/06/2012] [Accepted: 02/06/2012] [Indexed: 11/26/2022] Open
Abstract
BACKGROUND/PURPOSE Current guidelines recommend that hypospadias repair should be performed before age 18 months. This study aims to investigate the trends of surgical timing and to determine what factors are associated with age at surgery. METHODS The present study utilized a subset of the National Health Insurance Research Database, known as Longitudinal Health Insurance Database 2005, which contains the data of all paid medical benefit claims over the period from 1997 to 2007 for a subset of one million beneficiaries randomly drawn from the population of 22.72 million individuals in NHI program during any part of calendar year 2005. We analyzed claims data for all subjects with the diagnoses of hypospadias. RESULTS Among 52,705 live male newborns, 218 were diagnosed with hypospadias and thus were included as subjects in our study. Among them, 89 received repair surgery. Approximately 60.6% of the study subjects received repair after the age of 18 months. Multivariate analysis showed that several factors were significantly associated with age at hypospadias surgery: specialty of clinics where first diagnosis was made; specialty of physician making the first diagnosis, age of physician making the first diagnosis; specialty of surgeon performing the surgery; number of years since surgeon's board certification; urbanization level of subject's residence; modality of surgery; concomitant cryptorchidism; concomitant prematurity and low birth weight; age at diagnosis; and number of well-baby clinic visits. CONCLUSION This study addresses an important issue of delayed hypospadias surgery in Taiwan, which provides a potential opportunity for improvement in quality of care.
Collapse
|
69
|
Lang WZ, Ji Q, Shen JP, Guo YJ, Chu LF. Modified poly(vinylidene fluoride) hollow fiber composite membranes reinforced by hydroxyapatite nanocrystal whiskers. J Appl Polym Sci 2012. [DOI: 10.1002/app.38066] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
70
|
Ma FM, Guo YJ, Shan X. Analysis of the impact of attitudinal character on the multicriteria decision making with OWA operators. INT J INTELL SYST 2012. [DOI: 10.1002/int.21533] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
71
|
Guo YP, Guo LH, Yao YB, Ning CQ, Guo YJ. Magnetic mesoporous carbonated hydroxyapatite microspheres with hierarchical nanostructure for drug delivery systems. Chem Commun (Camb) 2011; 47:12215-7. [PMID: 21998826 DOI: 10.1039/c1cc15190h] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Magnetic mesoporous carbonated hydroxyapatite microspheres have been fabricated hydrothermally by using CaCO(3)/Fe(3)O(4) microspheres as sacrificial templates. The high drug-loading capacity and sustained drug release property suggest that the multifunctional microspheres have great potentials for bone-implantable drug-delivery applications.
Collapse
|
72
|
Guo YJ, Zhu Y, Sun SH. Identification and functional studies of HLA-A0201 restricted CTL epitopes in the X protein of hepatitis B virus. Acta Virol 2011; 55:107-15. [PMID: 21692558 DOI: 10.4149/av_2011_02_107] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Cytotoxic T lymphocyte (CTL) epitopes in the X protein (HBx) of hepatitis B virus (HBV) may play a key role in the viral control and liver damage. The aim of this study was to identify and study the function of HLA-A0201 restricted CTL epitopes in HBx of HBV genotypes B and C that are epidemic in China. Four nonapeptides signed HBx1: VLCLRPVGA, HBx2: CLFKDWEEL, HBx3: VLHKRTLGL, and HBx4: HLSLRGLPV were predicated by computational analysis and manually confirmed by defining the peptide supermotif, extended motif, and quantitative motif. Synthesized peptides were examined for their affinity and binding stability with HLA-A0201. After being analyzed by enzyme-linked immunospot (ELISPOT) and cytolytic activity assays, the HBx2 epitope was selected for a construction of HLA-A0201-peptide tetramers. The tetramer staining method was used to analyze peripheral blood mononuclear cells (PBMCs) isolated from HBV-infected patients at different disease stages (chronic hepatitis, liver cirrhosis, and hepatoma). Compared with CTL epitopes in the HBV envelope or polymerase, HBx2 is also a potential HLA-A0201 restricted CTL epitope, what may have a clinical implication.
Collapse
|
73
|
|
74
|
Lang WZ, Ouyang JX, Guo YJ, Chu LF. Synthesis of Tubular Faujasite X-Type Membranes with Mullite Supports and their Gas Permeances for N2/CO2 Mixtures. SEP SCI TECHNOL 2011. [DOI: 10.1080/01496395.2011.572940] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
75
|
Chen RZ, Cui L, Guo YJ, Rong YM, Lu XH, Sun MY, Zhang L, Tian JK. In vivo study of four preparative extracts of Clematis terniflora DC. for antinociceptive activity and anti-inflammatory activity in rat model of carrageenan-induced chronic non-bacterial prostatitis. JOURNAL OF ETHNOPHARMACOLOGY 2011; 134:1018-1023. [PMID: 21220002 DOI: 10.1016/j.jep.2011.01.004] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2010] [Revised: 10/20/2010] [Accepted: 01/05/2011] [Indexed: 05/30/2023]
Abstract
AIM OF THE STUDY The present study was conducted to evaluate the anti-inflammatory and antinociceptive activities of Clematis terniflora DC. extracts and fractions and to further support its traditional use as Chinese folk medicine in treatment of urinary infections, especially the disease of prostatitis. MATERIALS AND METHODS The antinociceptive activity of its water extract (WE), 70% ethanol extract (EE), water eluted part of EE from AB-8 macroporous resin (WEPMR) and 70% ethanol eluted part of EE from AB-8 macroporous resin (EEPMR) was conducted using mice writhing test with different doses. Then the anti-inflammatory activity of the four parts was evaluated on rat models of carrageenan-induced chronic non-bacterial prostatitis (CNP). Preliminary study was taken to determine the phytochemical compositions of the four preparative extracts. RESULTS Significant writhing inhibitory effect was found with EE at small (7.5 g/kg body wt.), moderate (15 g/kg body wt.) and large (30 g/kg body wt.) doses (doses here are presented as crude herbs) as well as EEPMR at moderate and large doses by oral administration (OA) (p≤0.01). Data from prostatic index, lecithin microsome density and white blood cell level showed that moderate dose of EE and EEPMR both had significant (p≤0.05 or p≤0.01) inhibition effect on carrageenan-induced inflammation in rat prostate. The HPLC analytical results showed that flavonoids were the main active compounds in WE, EE and EEPMR. And most flavonoids were accumulated into the part of EEPMR by AB-8 macroporous resin leaving only few compounds in WEPMR. No acute toxicity was identified in oral administration of the four parts at a dose of 100g/kg body wt. CONCLUSIONS The results described here suggest that extracts of the aerial part of Clematis terniflora DC. might be of therapeutic interest in the treatment of prostatitis.
Collapse
|