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Yang H, Zhou T, Wang H, Liu T, Ueda K, Zhan R, Zhao L, Tong Y, Tian X, Zhang T, Jin Y, Han X, Li Z, Zhao Y, Guo X, Xiao W, Fan D, Liu G, Chui D. Lipoprotein lipase deficiency leads to α-synuclein aggregation and ubiquitin C-terminal hydrolase L1 reduction. Neuroscience 2015; 290:1-10. [DOI: 10.1016/j.neuroscience.2014.12.068] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2014] [Revised: 12/29/2014] [Accepted: 12/30/2014] [Indexed: 10/24/2022]
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Zhu DY, Jiang LF, Deng XZ, Xiao W, Pei JP, Li BJ, Wang CJ, Zhang JH, Zhang Q, Zhou ZX, Ding WL, Xu XD, Yue M. TBX21 polymorphisms are associated with virus persistence in hepatitis C virus infection patients from a high-risk Chinese population. Eur J Clin Microbiol Infect Dis 2015; 34:1309-18. [PMID: 25759111 DOI: 10.1007/s10096-015-2337-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2014] [Accepted: 01/22/2015] [Indexed: 01/29/2023]
Abstract
Hepatitis C virus (HCV) infection is a major cause of chronic liver disease and the varied outcomes of the infection depend on both viral and host factors. We have demonstrated that the HCV alternate reading frame protein (F protein) is related to Th1/Th2 bias which is involved in virus persistence in chronic hepatitis C (CHC) patients. The purpose of this study was to test the hypothesis that genetic variants of TBX21 (T cell specific T-box transcription factor) were associated with the outcomes of HCV infection and F protein generation. Three single nucleotide polymorphisms (SNPs) (rs17250932, rs2074190, rs4794067) in the TBX21 gene were genotyped in a case-control study in a cohort of a high-risk group, including 354 healthy controls and 747 CHC patients (190 anti-F protein antibody seronegative patients and 557 anti-F protein antibody seropositive patients). Results showed that the rs4794067 C allele in the TBX21 promoter was significantly more common in CHC patients (OR = 1.335, 95% CI = 1.058-1.684, P = 0.015), exceptionally in anti-F protein seropositive patients (OR = 1.547, 95% CI = 1.140-2.101, P = 0.005), compared with healthy controls. And the risk effect was also significantly high in patients with HCV 1b genotype and mild fibrosis (P = 0.021, P = 0.010, respectively). Compared with the most frequent haplotype TAT, haplotype analysis showed that the distribution of TAC was significantly different between the chronic HCV carrier group and the healthy group, and so was the anti-F antibody seronegativity group and the anti-F antibody seronegativity group (all P < 0.001). Our results suggested that TBX21 variants may be involved in the etiology of this disease.
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Liu Y, Xiao W, Yi JJ, Hu C, Park SJ, Ward MD. Regulating the Architectures of Hydrogen-Bonded Frameworks through Topological Enforcement. J Am Chem Soc 2015; 137:3386-92. [DOI: 10.1021/jacs.5b00534] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Xiao W, Jin O, Han S, Nie R, Zhu L, Gao X, Li L. Correlations of leukemia inhibitory factor and macrophage migration inhibitory factor with endometrial carcinoma. EUR J GYNAECOL ONCOL 2015; 36:146-149. [PMID: 26050351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
OBJECTIVE To investigate the correlations of leukemia inhibitory factor (LIF) and macrophage migration inhibitory factor (MIF) with endometrial carcinoma. MATERIALS AND METHODS The study included 113 endometrial specimens from the Fourth Affiliated Hospital of Harbin Medical University, collected from May 2006 to October 2008, classified into normal endometrium, simple hyperplasia, complex hyperplasia, atypical hyperplasia, and endometrial carcinoma. The LIF and MIF expression of all 113 specimens was detected with immunohistochemistrical (IHC) method. RESULTS The MIF expression in hyperplastic endometrium and endometrial carcinoma increased significantly as compared with that in normal endometrium (p < 0.05 and p < 0.001, respectively), and its expression in endometrial carcinoma was also remarkably higher than that in hyperplastic endometrium (p < 0.001). The expressions of LIF in atypical hyperplasia and endometrial carcinoma were also significantly higher than that in the normal endometrium (p < 0.05), but it is not obviously higher in simple hyperplasia and complex hyperplasia than in the normal endometrium (p > 0.05). Furthermore, the expression of LIF showed no statistical difference between hyperplastic endometrium and endometrial carcinoma. CONCLUSION It could be speculated that MIF may be correlated with the occurrence of endometrial carcinoma. However, whether LIF also has a correlation with the occurrence of endometrial carcinoma still cannot be presumed.
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Xiao W, Liu X, Hong X, Yang Y, Lv Y, Fang J, Ding J. Magnetic-field-assisted synthesis of magnetite nanoparticles via thermal decomposition and their hyperthermia properties. CrystEngComm 2015. [DOI: 10.1039/c5ce00442j] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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81
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Lv Y, Yang Y, Fang J, Zhang H, Peng E, Liu X, Xiao W, Ding J. Size dependent magnetic hyperthermia of octahedral Fe3O4 nanoparticles. RSC Adv 2015. [DOI: 10.1039/c5ra12558h] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Octahedral Fe3O4 nanoparticles show a wide size range for high SAR values to be used as an excellent thermal seed for magnetic hyperthermia cancer treatment.
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82
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Xiao W, Zeng R, Cheng L, Wang JW, Jiang LJ, Wang LG. Tunable catalytic reactivity of small palladium clusters supported on graphene: a first-principles study. RSC Adv 2015. [DOI: 10.1039/c5ra11352k] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
The catalytic reactivity is controlled by the binding strength between the catalyst surface and reaction intermediates.
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Chen X, Xiao W, Liu X, Zeng M, Luo L, Wu M, Ye S, Liu Y. Blockade of Jagged/Notch pathway abrogates transforming growth factor β2-induced epithelial-mesenchymal transition in human retinal pigment epithelium cells. Curr Mol Med 2014; 14:523-34. [PMID: 24694299 DOI: 10.2174/1566524014666140331230411] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2013] [Revised: 06/21/2013] [Accepted: 07/23/2013] [Indexed: 11/22/2022]
Abstract
The epithelial-mesenchymal transition (EMT) of retinal pigment epithelium (RPE) cells plays a key role in proliferative vitreoretinopathy (PVR) and proliferative diabetic retinopathy (PDR), which lead to the loss of vision. The Jagged/Notch pathway has been reported to be essential in EMT during embryonic development, fibrotic diseases and cancer metastasis. However, the function of Jagged/Notch signaling in EMT of RPE cells is unknown. Thus, we hypothesized that a crosstalk between Notch and transforming growth factor β2 (TGF-β2) signaling could induce EMT in RPE cells, which subsequently contributes to PVR and PDR. Here, we demonstrate that Jagged-1/Notch pathway is involved in the TGF-β2-mediated EMT of human RPE cells. Blockade of Notch pathway with DAPT (a specific inhibitor of Notch receptor cleavage) and knockdown of Jagged-1 expression inhibited TGF-β2-induced EMT through regulating the expression of Snail, Slug and ZEB1. Besides the canonical Smad signaling pathway, the noncanonical PI3K/Akt and MAPK pathway also contributed to TGF-β2-induced up-regulation of Jagged-1 in RPE cells. Overexpression of Jagged-1 could mimic TGF-β2 induce EMT. Our data suggest that the Jagged-1/Notch signaling pathway plays a critical role in TGF-β2-induced EMT in human RPE cells, and may contribute to the development of PVR and PDR. Inhibition of the Jagged/Notch signaling pathway, therefore, may have therapeutic value in the prevention and treatment of PVR and PDR.
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Han X, Pang Y, Liu S, Tan Z, Tang S, Zhou C, Wang M, Xiao W. Antidiarrhea and antioxidant activities of Honokiol extract from Magnoliae officinalis cortex in mice. TROP J PHARM RES 2014. [DOI: 10.4314/tjpr.v13i10.11] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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85
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Chui DH, Marcellino M, Marotta F, Sweed H, Solimene U, Vignali AI, Xiao W, Ayala A, Cagnuolo U, Zerbinati N. A double-blind, rct testing beneficial modulation of BDNF in middle-aged, life style-stressed subjects: a clue to brain protection? J Clin Diagn Res 2014; 8:MC01-6. [PMID: 25584253 PMCID: PMC4290272 DOI: 10.7860/jcdr/2014/10301.5141] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2014] [Accepted: 09/04/2014] [Indexed: 02/07/2023]
Abstract
INTRODUCTION The aim of this prospective study was to see whether LD-1227, a quality-controlled marine nutraceuticals shown to protect experimental stress-induced hyppocampal degeneration, could beneficially modulate BDNF, as measured in the serum, in otherwise healthy but work-stressed individuals. MATERIALS AND METHODS Forty-eight men and women between the ages of 38 and 62 reporting high-demanding work activity but with an overall positive attitude towards their personal life were recruited. Subjects were divided in two group (24 patients each) and blindly supplemented for 2 month with: a) LD-1227 400mg or b) placebo. A third group of healthy non-stressed subjects was used as well. Blood samples were taken before and after the supplementation period. Unstimulated saliva was collected and tested for amylase while serum levels were used to measure BDNF. State Trait Anxiety Inventory (STAI), Pittsburgh Sleep Quality Index (PSQI) and psychological well-being assessment (PSWB) were measured too. Patients with Val66Met functional polymorphism of BDNF excluded those given their reported association with an impaired release of BDNF. RESULTS RESULTS showed that, as compared to healthy, non-stressed individuals, stressed ones has a trend decrease of BDNF and this was significantly increased by LD 12-1227 supplementation and the same inverse phenomenon occurred to salivary amylase (p<0.05). No change was noted in the PSQI score but, either STAI or PSWB tests scored better in LD-1227 supplemented subjects. CONCLUSION The present data suggest that LD-1227 is beneficially affecting neuromodulation and related symptoms during common stressful life conditions and may have the potential as tools in a neuroprotective clinical strategy.
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Xue WH, Xiao W, Shang J, Chen XX, Zhu XJ, Pan L, Tan HW, Zhang WB, Ji ZH, Liu G, Xu XH, Ding J, Li RW. Intrinsic and interfacial effect of electrode metals on the resistive switching behaviors of zinc oxide films. NANOTECHNOLOGY 2014; 25:425204. [PMID: 25274278 DOI: 10.1088/0957-4484/25/42/425204] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Exploring the role of electrode metals on the resistive switching properties of metal electrode/oxide/metal electrode sandwiched structures provides not only essential information to understand the underlying switching mechanism of the devices, but also useful guidelines for the optimization of the switching performance. A systematic study has been performed to investigate the influence of electrodes on the resistive switching characteristics of zinc oxide (ZnO) films in this contribution, in terms of both the intrinsic and interfacial effects. It has been found that the low-resistance state resistances (Ω(LRS)) of all the investigated devices are below 50 Ω, which can be attributed to the formation of highly conductive channels throughout the ZnO films. On the other hand, the high-resistance state resistances (Ω(HRS)) depend on the electronegativity and ionic size of the employed electrode metals. Devices with electrode metals of high electronegativity and large ionic size possess high Ω(HRS) values, while those with electrode metals of low electronegativity and small ionic size carry low Ω(HRS) values. A similar trend of the set voltages has also been observed, while the reset voltages are all distributed in a narrow range close to ±0.5 V. Moreover, the forming voltages of the switching devices strongly depend on the roughness of the metal/ZnO and/or ZnO/metal interface. The present work provides essential information for better understanding the switching mechanism of zinc oxide based devices, and benefits the rational selection of proper electrode metals for the device performance optimization.
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Dielschneider RF, Xiao W, Yoon JY, Noh E, Banerji V, Li H, Marshall AJ, Johnston JB, Gibson SB. Gefitinib targets ZAP-70-expressing chronic lymphocytic leukemia cells and inhibits B-cell receptor signaling. Cell Death Dis 2014; 5:e1439. [PMID: 25275600 PMCID: PMC4649506 DOI: 10.1038/cddis.2014.391] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2014] [Revised: 07/04/2014] [Accepted: 08/06/2014] [Indexed: 01/03/2023]
Abstract
Chronic lymphocytic leukemia (CLL) can be divided into groups based on biomarkers of poor prognosis. The expression of the tyrosine kinase ZAP-70 (member of the Syk tyrosine kinase family) in CLL cells is associated with shorter overall survival in CLL patients. Currently, there is a lack of targeted therapies for patients with ZAP-70 expression in CLL cells. The tyrosine kinase inhibitor gefitinib has been shown to be effective at induce apoptosis in acute myeloid leukemia through inhibition of Syk. In this study, we sought to test the efficacy of gefitinib in primary human ZAP-70+ CLL cells. We demonstrate that gefitinib preferentially induces cell death in ZAP-70-expressing CLL cells with a median IC50 of 4.5 μM. In addition, gefitinib decreases the viability of ZAP-70+ Jurkat T leukemia cells but fails to affect T cells from CLL patients. Western blot analysis shows gefitinib reduces both basal and B-cell receptor (BCR)-stimulated phosphorylation of Syk/ZAP-70, ERK, and Akt in ZAP-70+ CLL cells. Moreover, gefitinib inhibits the pro-survival response from BCR stimulation and decreases pro-survival proteins such as Mcl-1. Finally, ZAP-70 expression sensitizes Raji cells to gefitinib treatment. These results demonstrate that gefitinib specifically targets ZAP-70+ CLL cells and inhibits the BCR cell survival pathway leading to apoptosis. This represents the likelihood of tyrosine kinase inhibitors being effective targeted treatments for ZAP-70+ CLL cells.
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88
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Xiao W, Hu C, Ward MD. Guest Exchange through Single Crystal–Single Crystal Transformations in a Flexible Hydrogen-Bonded Framework. J Am Chem Soc 2014; 136:14200-6. [DOI: 10.1021/ja507689m] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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Xiao W, YanQing C, Fei H, LiXia L, Chong Z. Delineation of the Clinical Target Volume in Early-Stage Nasopharyngeal Carcinoma Treated With Intensity Modulated Radiation Therapy: Long-Term Follow-Up of a Phase 2 Study. Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2014.05.1616] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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90
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Lee K, Xiao W, Fu G, Quinn P, Sun YH, Xiao N, Wang Q, Chan G, Pascalis O, Damon F. The eye-size illusion: Psychophysical characteristics, generality, relation to holistic processing, and a role for visual experience. J Vis 2014. [DOI: 10.1167/14.10.569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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91
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Ryu SY, Payne SH, Schaab C, Xiao W. Beyond the proteome: Mass Spectrometry Special Interest Group (MS-SIG) at ISMB/ECCB 2013. Bioinformatics 2014; 30:2089-90. [DOI: 10.1093/bioinformatics/btu116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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92
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Xiao W, Zhang X, Geng WT, Lu G. Helium bubble nucleation and growth in α-Fe: insights from first-principles simulations. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2014; 26:255401. [PMID: 24871542 DOI: 10.1088/0953-8984/26/25/255401] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We have carried out a first-principles study on the nucleation and early-stage growth of He bubbles in Fe. The energetics, atomic and electronic structure of He-vacancy complexes, involving both a monovacancy and a nine-vacancy cluster, are examined. Based on the energetics, we then perform thermodynamics analysis to gain deeper insights into He bubble nucleation and growth. We have determined the energy cost for the nucleation of He bubbles and found that up to eight He atoms can be trapped at a single vacancy. In order to capture more He atoms, the vacancy has to emit Frenkel pairs to release the substantial stress building on the surrounding Fe lattice. Compared to the monovacancy, the nine-vacancy cluster has a lower energy cost for He bubble nucleation and growth. He atoms at the vacancy repel the surrounding electronic charge and redistribute it on the neighboring Fe atoms. The thermodynamic analysis reveals that He chemical potential provides a driving force for He bubble nucleation and growth. There are two critical He chemical potentials that are of particular importance: one of them marks the transition from single He occupation to multiple He occupation at a monovacancy while the other sets off He-induced superabundant vacancy formation.
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Huang J, Li X, Li M, Li J, Xiao W, Ma W, Chen X, Liang X, Tang S, Luo Y. Mitochondria-targeted antioxidant peptide SS31 protects the retinas of diabetic rats. Curr Mol Med 2014; 13:935-45. [PMID: 23745582 DOI: 10.2174/15665240113139990049] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2013] [Revised: 04/28/2013] [Accepted: 05/29/2013] [Indexed: 11/22/2022]
Abstract
Oxidative stress is one of the main contributors in the pathogenesis of diabetic retinopathy. The aim of this study is to investigate the effects of SS31 which is a mitochondria-targeted antioxidant peptide on the retinas of streptozotocin (STZ)-induced diabetic rats. Two weeks after induction of diabetes, SS31 (3 mg/kg) or the same volume of normal saline (N.S) was injected subcutaneously into the back of diabetic rats every day. Four months later, the integrity of inner blood retinal barrier (iBRB) was measured by Evans blue perfusion. The expression and distribution of claudin-5, occludin, acrolein, 8-OHdG and nitrotyrosine in the rat retinas were detected by immunofluorescent staining. Retinal ultrastructures were observed by transmission electron microscopy. The protein level of VEGFR2, Trx-2, Bcl-2, Bax, caspase-3, p53, and NF-κB in the rat retinas were assayed by western blot. Four months after subcutaneous injection, the diabetic rats treated with SS31 had better structures of retinal ganglion cells, thinner capillary basement membrane, less iBRB leakage, more uniform staining of claudin-5 and occludin in the retinal vessels, lower levels of acrolein, 8-OHdG, nitrotyrosine, Bax, caspase-3, p53, and NF-κB, and higher levels of Trx-2 and Bcl-2 in the retinas than those treated with N.S. In conclusion, SS31 could protect the retinal structures and inhibit the breakdown of iBRB by reducing oxidative damage, increasing Trx-2 and Bcl-2 expression, and decreasing p53, NF-κB, Bax, caspase-3, and VEGFR2 expression in the retinas of diabetic rats. SS31 could be a potential new treatment for diabetic retinopathy and other oxidative stress-related diseases.
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Wang M, Hao FY, Wang JG, Xiao W. Group IIa secretory phospholipase A2 (sPLA2IIa) and progression in patients with lung cancer. EUROPEAN REVIEW FOR MEDICAL AND PHARMACOLOGICAL SCIENCES 2014; 18:2648-2654. [PMID: 25317799] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
OBJECTIVE Group IIa secretory phospholipase A2 (sPLA2 IIa) plays a role in the malignant potential of several epithelial cancers. It is overexpressed in many cancer specimens and its elevated levels are correlated with high tumor grade and metastasis. Here, we evaluate the clinical significance of sPLA2 IIa in lung adenocarcinoma and the role of sPLA2 IIa in the process of cancer cell invasion and metastasis. PATIENTS AND METHODS Immunohistochemistry was used to investigate sPLA2 IIa in surgically resected lung adenocarcinoma of 180 patients and its correlation with survival. We overexpressed sPLA2 IIa in a lung adenocarcinoma cell line with very low sPLA2 IIa levels and investigated the in vitro and in vivo effects of sPLA2 IIa expression. RESULTS High expression of sPLA2 IIa in lung cancer tissue was significantly associated with clinical stage, metastasis, postoperative relapse and shorter patient survival. The overexpression of sPLA2 IIa enhanced xenograft tumor growth and invasion in vitro. CONCLUSIONS sPLA2 IIa expression can predict the clinical outcome of lung adenocarcinoma patients. sPLA2 IIa is a novel invasion-promoting gene in lung adenocarcinoma.
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Xiao W, Li CQ, Xiao XP, Lin FZ. Expression and fast preparation of biologically active recombinant human coagulation factor VII in CHO-K1 cells. GENETICS AND MOLECULAR RESEARCH 2013; 12:6813-24. [PMID: 24391029 DOI: 10.4238/2013.december.16.7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Human coagulation factor VII (FVII) plays an important role in the blood coagulation process and exists in micro amounts in human plasma; therefore, any attempt at the large-scale production of FVII in significant quantities is challenging. The purpose of this study was to express and obtain biologically active recombinant FVII (rFVII) from Chinese hamster ovary K1 (CHO-K1) cells. The full-length FVII cDNA was isolated from a HepG2 cell line and then subcloned in pcDNA3.1 to construct an expression vector, pcDNA-FVII. CHO-K1 cells were transfected with 1 µg pcDNA-FVII. The cell line that stably expressed secretory FVII was screened using 900 µg/mL G418. The FVII copy number in CHO-K1 cells was detected by quantitative polymerase chain reaction (qPCR). The rFVII was purified in ligand affinity chromatography medium. The purified protein was detected by sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) and Western blot analysis. The biological activity of the purified FVII protein was determined by a prothrombin time assay. Three cell lines that permanently expressed rFVII were screened. The qPCR results demonstrated that each CHO-K1 cell harbored two FVII DNA copies. The SDS-PAGE and Western blot analysis showed that the purified protein was about 50 kDa. The purity of the target protein was 95%. The prothrombin time assay indicated that the FVII-specific activity of rFVII was 2573 ± 75 IU/mg. This method enabled the fast preparation of high-purity rFVII from CHO-K1 cells, and the purified protein had good biological activity.
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Wang LH, Li Y, Yang SN, Wang FY, Hou Y, Cui W, Chen K, Cao Q, Wang S, Zhang TY, Wang ZZ, Xiao W, Yang JY, Wu CF. Gambogic acid synergistically potentiates cisplatin-induced apoptosis in non-small-cell lung cancer through suppressing NF-κB and MAPK/HO-1 signalling. Br J Cancer 2013; 110:341-52. [PMID: 24300974 PMCID: PMC3899775 DOI: 10.1038/bjc.2013.752] [Citation(s) in RCA: 85] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2013] [Revised: 10/23/2013] [Accepted: 10/29/2013] [Indexed: 12/20/2022] Open
Abstract
Background: Gambogic acid (GA) has been reported to have potent anticancer activity and is authorised to be tested in phase II clinical trials for treatment of non-small-cell lung cancer (NSCLC). The present study aims to investigate whether GA would be synergistic with cisplatin (CDDP) against the NSCLC. Methods: 1-(4,5-Dimethylthiazol-2-yl)-3,5-diphenylformazan (MTT), combination index (CI) isobologram, western blot, quantitative PCR, flow cytometry, electrophoretic mobility shift assay, xenograft tumour models and terminal deoxynucleotide transferase-mediated dUTP nick-end labelling analysis were used in this study. Results: The cell viability results showed that sequential CDDP-GA treatment resulted in a strong synergistic action in A549, NCI-H460, and NCI-H1299 cell lines, whereas the reverse sequence and simultaneous treatments led to a slight synergistic or additive action. Increased sub-G1 phase cells and enhanced PARP cleavage demonstrated that the sequence of CDDP-GA treatment markedly increased apoptosis in comparison with other treatments. Furthermore, the sequential combination could enhance the activation of caspase-3, -8, and 9, increase the expression of Fas and Bax, and decrease the expression of Bcl-2, survivin and X-inhibitor of apoptosis protein (X-IAP) in A549 and NCI-H460 cell lines. In addition, increased apoptosis was correlated with enhanced reactive oxygen species generation. Importantly, it was found that, followed by CDDP treatment, GA could inhibit NF-κB and mitogen-activated protein kinase (MAPK)/heme oxygenase-1 (HO-1) signalling pathways, which have been validated to reduce ROS release and confer CDDP resistance. The roles of NF-κB and MAPK pathways were further confirmed by using specific inhibitors, which significantly increased ROS release and apoptosis induced by the sequential combination of CDDP and GA. Moreover, our results indicated that the combination of CDDP and GA exerted increased antitumour effects on A549 xenograft models through inhibiting NF-κB, HO-1, and subsequently inducing apoptosis. Conclusion: Gambogic acid sensitises lung cancer cells to CDDP in vitro and in vivo in NSCLC through inactivation of NF-κB and MAPK/HO-1 signalling pathways, providing a rationale for the combined use of CDDP and GA in lung cancer chemotherapy.
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Chen X, Xiao W, Chen W, Luo L, Ye S, Liu Y. The epigenetic modifier trichostatin A, a histone deacetylase inhibitor, suppresses proliferation and epithelial-mesenchymal transition of lens epithelial cells. Cell Death Dis 2013; 4:e884. [PMID: 24157878 PMCID: PMC3920942 DOI: 10.1038/cddis.2013.416] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2013] [Revised: 09/10/2013] [Accepted: 09/17/2013] [Indexed: 01/02/2023]
Abstract
Proliferation and epithelial-mesenchymal transition (EMT) of lens epithelium cells (LECs) may contribute to anterior subcapsular cataract (ASC) and posterior capsule opacification (PCO), which are important causes of visual impairment. Histone deacetylases (HDACs)-mediated epigenetic mechanism has a central role in controlling cell cycle regulation, cell proliferation and differentiation in a variety of cells and the pathogenesis of some diseases. However, whether HDACs are involved in the regulation of proliferation and EMT in LECs remain unknown. In this study, we evaluated the expression profile of HDAC family (18 genes) and found that class I and II HDACs were upregulated in transforming growth factor β2 (TGFβ2)-induced EMT in human LEC lines SRA01/04 and HLEB3. Tricostatin A (TSA), a class I and II HDAC inhibitor, suppressed the proliferation of LECs by G1 phase cell cycle arrest not only through inhibition of cyclin/CDK complexes and induction of p21 and p27, but also inactivation of the phosphatidylinositol-3-kinase/Akt, p38MAPK and ERK1/2 pathways. Meanwhile, TSA strongly prevented TGFβ2-induced upregulation of fibronectin, collagen type I, collagen type IV, N-cadherin, Snail and Slug. We also demonstrated that the underlying mechanism of TSA affects EMT in LECs through inhibiting the canonical TGFβ/Smad2 and the Jagged/Notch signaling pathways. Finally, we found that TSA completely prevented TGFβ2-induced ASC in the whole lens culture semi-in vivo model. Therefore, this study may provide a new insight into the pathogenesis of ASC and PCO, and suggests that epigenetic treatment with HDAC inhibitors may be a novel therapeutic approach for the prevention and treatment of ASC, PCO and other fibrotic diseases.
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Peng P, Gu H, Xiao W, Si LF, Wang JF, Wang SK, Zhai RY, Wei YX. A voxel-based morphometry study of anosmic patients. Br J Radiol 2013; 86:20130207. [PMID: 24133057 DOI: 10.1259/bjr.20130207] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVE The aim of our study was to compare volume change in grey matter (GM) and white matter (WM) in a group of subjects with anosmia and a healthy control group. We tried to find a regular pattern of atrophy within and between GM and WM and to determine whether any particular areas are more sensitive to olfactory injury. METHODS There were 19 anosmic patients and 20 age- and sex-matched control subjects. We acquired MR images on a 3-T scanner and performed voxel-based morphometry using the VBM8 toolbox and SPM8 in a MATLAB® (MathWorks®, Natick, MA) environment. RESULTS Patients with anosmia showed a significant decrease in GM volume, mainly in the anterior cingulate cortex, middle temporal gyrus, superior temporal gyrus, fusiform gyrus, supramarginal gyrus, superior frontal gyrus, middle frontal gyrus, middle occipital gyrus, anterior insular cortex and cerebellum. In addition, we observed volume decreases in smaller areas such as the piriform cortex, the inferior temporal gyrus, the precuneus and the subcallosal gyrus. All WM areas with atrophy were near those GM areas that experienced volume loss. There was more volume atrophy in GM areas corresponding to WM areas with more volume loss. Atrophy increased with disease duration. CONCLUSION There is simultaneous atrophy in GM and WM, and the degree of atrophy is greater with longer disease duration. Different GM and WM areas have different sensitivities to olfactory injury. ADVANCES IN KNOWLEDGE This study examines the atrophy pattern in and between GM and WM-a subject that has not been widely researched previously.
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Suby N, Xiao K, Yi Y, Xiao W, Tiglao L, Lam K. Tumor-specific targeting with novel LXY-30 peptide-linked nanoparticles for paclitaxel delivery in ovarian cancer mouse xenograft model. Gynecol Oncol 2013. [DOI: 10.1016/j.ygyno.2013.04.364] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Xiao W, Tormey CA, Capetillo A, Maitta RW. Allergic transfusion reactions to platelets are more commonly associated with prepooled than apheresis components. Vox Sang 2013; 105:334-40. [DOI: 10.1111/vox.12063] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2013] [Revised: 05/29/2013] [Accepted: 05/31/2013] [Indexed: 11/29/2022]
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