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Hua W, Chen K, Zhou X, Dai Y, Chen R, Wang J, Ding L, Liu Z, Feng T, Yu J, Cheng J, Liu C, Zhang S. Cardiac resynchronization therapy reduces T-wave alternans in patients with heart failure. Europace 2014; 17:281-8. [DOI: 10.1093/europace/euu258] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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177
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Turner J, Dawson J, Grant S, Shain K, Cubitt C, Dai Y, Zhoui L, Kauffman M, Shacham S, Sullivan D. 220 Overcoming drug-resistance in multiple myeloma by XPO1 inhibitor combination therapy. Eur J Cancer 2014. [DOI: 10.1016/s0959-8049(14)70346-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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178
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Zhang R, Ran Y, Dai Y, Yang H, Zhang H, Lu Y, Wang L. Infectious granuloma caused by Burkholderia fungorum confirmed by laser-capture microdissection and polymerase chain reaction. Br J Dermatol 2014; 171:1261-3. [PMID: 24805209 DOI: 10.1111/bjd.13094] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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179
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Tong B, Wan B, Wei Z, Wang T, Zhao P, Dou Y, Lv Z, Xia Y, Dai Y. Role of cathepsin B in regulating migration and invasion of fibroblast-like synoviocytes into inflamed tissue from patients with rheumatoid arthritis. Clin Exp Immunol 2014; 177:586-97. [PMID: 24749816 PMCID: PMC4137842 DOI: 10.1111/cei.12357] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/14/2014] [Indexed: 12/27/2022] Open
Abstract
Cathepsin B (CB), an important proteinase that participates in joint destruction in rheumatoid arthritis (RA), exhibits higher expression in fibroblast-like synoviocyte (FLS) of abnormal proliferative synovial tissues. Whether and how it affects the biological behaviours of RA-FLS, such as migration and invasion, are poorly understood. In the present study, CB expression in synovial tissues of patients with RA and ostearthritis (OA) were measured by quantitative polymerase chain reaction (qPCR) and immunohistochemistry (IHC), respectively. Stable depletion of endogenous CB was achieved by small interfering RNA (siRNA) transfection, and decrease of CB activity was acquired by using its specific inhibitor (CA074Me). The effects of CA074Me and RNA interference (RNAi) treatments on proliferation, migration, invasion, matrix metalloproteinase (MMP)-2/-9 expression, focal adhesion kinase (FAK) activation, and mitogen-activated protein kinases (MAPKs) phosphorylation of FLS were analysed. In RA synovial tissues, CB was expressed at elevated levels compared with OA synovial tissues. CA074Me could inhibit invasion of FLS obtained from RA patients in an ex-vivo invasion model. CA074Me and siRNA treatments suppressed the migration and invasion of FLS, reduced the activity, expression and mRNA level of MMP-2, restrained the activation of FAK and reduced the expression of F-actin. Moreover, CA074Me decreased the phosphorylation of P38 MAPK and c-Jun N-terminal kinase (JNK) in FLS, while siCB treatment reduced the phosphorylation of P38 but not JNK. CB substantially contributes to the invasive phenotype of FLS that leads to joint destruction in RA. This proteinase may show promise as a therapeutic target in inflammatory arthritis.
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Dai Y, Metzler M, Jacob T, Kolb D, Ziener U. Fast vs. Slow: Electrolyte and Potential Dependent Adlayer Switching of an Oligopyridine on Au(111). Electrochim Acta 2014. [DOI: 10.1016/j.electacta.2014.06.046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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181
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Dai Y, Dong S, Zhu M, Wu D, Zhong Y. Visualizing cerebral veins in fetal brain using susceptibility-weighted MRI. Clin Radiol 2014; 69:e392-7. [PMID: 25060932 DOI: 10.1016/j.crad.2014.06.010] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2014] [Revised: 06/09/2014] [Accepted: 06/10/2014] [Indexed: 01/12/2023]
Abstract
AIM To explore the feasibility of two-dimensional (2D) susceptibility-weighted imaging (SWI) in the visualization of cerebral veins in the foetal brain. MATERIALS AND METHODS Forty-two pregnant healthy women (gestational age: 19-37 weeks, mean: 28.5 ± 7.1 weeks) underwent SWI examination using a 1.5 T MRI system. Two neurologists independently analysed all magnetic resonance imaging (MRI) studies. The relationship between the veins detected and the gestational age was investigated. The prominence of veins was assessed using a categorical score. RESULTS In total, 167 veins were detected by SWI in 29 subjects with a symmetric hemisphere distribution (p > 0.05). An additional vein was detected by SWI biweekly from 24 weeks of gestation. Most veins of Galen and internal cerebral veins on SWI images were prominent, whereas others were faint or moderate. CONCLUSION SWI appears to be a feasible method of detecting cerebral veins in the foetal brain.
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182
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Xiong Z, Lin H, Jing J, Cai J, Dai Y. SU-E-T-283: Research of the Irradiation Damage to the Skin Cell by the Contaminative Electron in External Radiotherapy. Med Phys 2014. [DOI: 10.1118/1.4888614] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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183
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Dai Y, Wilson G, Huang B, Peng M, Teng G, Zhang D, Zhang R, Ebert MPA, Chen J, Wong BCY, Chan KW, George J, Qiao L. Silencing of Jagged1 inhibits cell growth and invasion in colorectal cancer. Cell Death Dis 2014; 5:e1170. [PMID: 24722295 PMCID: PMC5424114 DOI: 10.1038/cddis.2014.137] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2014] [Revised: 02/18/2014] [Accepted: 02/26/2014] [Indexed: 01/09/2023]
Abstract
Dysregulated Notch signaling has a critical role in the tumorigenesis. Jagged1, a Notch ligand, is overexpressed in various human cancers. Recent studies revealed the involvement of Jagged1 in colorectal cancer (CRC) development. These basic studies provide a promising potential for inhibition of the Notch pathway for the treatment of CRC. Herein, we aimed to investigate the consequences of targeting Jagged1 using shRNA on CRC both in vitro and in vivo to test their potential to inhibit this key element for CRC treatment. We found that downregulation of Jagged1 with lentiviral Jagged1-shRNA resulted in decreased colon cancer cell viability in vitro, most likely mediated through reduced cell proliferation. Importantly, Jagged1 knockdown induced G0/G1 phase cell cycle arrest, with reduced Cyclin D1, Cyclin E and c-Myc expression. Silencing of Jagged1 reduced the migration and invasive capacity of the colon cancer cells in vitro. Furthermore, colon cancer cells with knockdown of Jagged1 had much slower growth rate than control cells in a xenograft mouse model in vivo, with a marked downregulation of cell proliferation markers (PCNA, Ki-67, and c-Myc) and metastasis markers (MMP-2 and MMP-9). These findings rationalize a mechanistic approach to CRC treatment based on Jagged1-targeted therapeutic development.
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184
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Sui W, Cao C, Che W, Chen J, Xue W, Liu P, Guo L, Dai Y. Comparative analyses of histone H3K9 trimethylations in the heart and spleen of normal humans. GENETICS AND MOLECULAR RESEARCH 2014; 13:1697-706. [PMID: 24446338 DOI: 10.4238/2014.january.14.5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
The global features of trimethylations of histone 3 at lysine 9 (H3K9me3) have been well studied in recent years; however, most of these studies were performed in mammalian cell lines. In this study, we generated genome-wide maps of H3K9me3 of the human heart and spleen using chromatin immunoprecipitation followed by high-throughput sequencing (ChIP-seq) technology. We examined the global patterns of H3K9me3 in both tissues and found that modifications were closely associated with tissue-specific expression, function, and development. In addition, we found that 169 genes displayed significant H3K9me3 differences between the heart and spleen. Among these genes, 64 were heart-H3K9me3-specific, 87 genes were spleen-H3K9me3-specific, and 18 were shared in both heart- and spleen-H3K9me3. In conclusion, we observed significant differences in H3K9me3 in the heart and spleen, which may help to explain epigenetic differences between these tissues. Such novel findings highlight the significance of H3K9me3 as a potential biomarker or promising target for epigenetic-based disease treatment.
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185
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Gao X, Lu Q, Chou G, Wang Z, Pan R, Xia Y, Hu H, Dai Y. Norisoboldine attenuates inflammatory pain via the adenosine A1 receptor. Eur J Pain 2014; 18:939-48. [DOI: 10.1002/j.1532-2149.2013.00439.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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186
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Zhang J, Yang H, Li H, Liu F, Jia Q, Duan H, Niu Y, Bin P, Zheng Y, Dai Y. Peptide-binding motifs and characteristics for HLA -B*13:01 molecule. ACTA ACUST UNITED AC 2014; 81:442-8. [PMID: 23646949 DOI: 10.1111/tan.12114] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2012] [Revised: 01/28/2013] [Accepted: 03/18/2013] [Indexed: 11/28/2022]
Abstract
Trichloroethylene (TCE)-induced hypersensitivity dermatitis is one of the critical occupational diseases among workers in China. Our previous studies have identified a strong linkage between the disease and the HLA-B*13:01 allele. In this study, we searched for peptides bound to the HLA-B*13:01 molecule; 57 HLA-B*13:01-bound peptides in total were identified and 54 peptides were used to calculate frequency of amino acid residues to obtain binding motifs of HLA-B*13:01 molecule. The results showed P2, P3, and P9 were the primary binding anchor positions with the dominant anchor motifs of L, Q at P2, L at P9, D at P3. HLA-B*13:01-bound peptides were identified for the first time in our research, the results of which could contribute to the human leukocyte antigen (HLA)-binding peptides database.
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187
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Dai Y, Xiao Y, Wang Q, Wei S, Zhang X, Ma Z, Zheng H, Hou M, Zhang T. Syntheses and QSAR Studies of Benzylimidazole Derivatives and Benzylcarbazole as Potential Aromatase Inhibitors. ACTA ACUST UNITED AC 2014. [DOI: 10.14233/ajchem.2014.16016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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188
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Sui WG, He HY, Yan Q, Chen JJ, Zhang RH, Dai Y. ChIP-seq analysis of histone H3K9 trimethylation in peripheral blood mononuclear cells of membranous nephropathy patients. ACTA ACUST UNITED AC 2013; 47:42-9. [PMID: 24345872 PMCID: PMC3932972 DOI: 10.1590/1414-431x20132809] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2012] [Accepted: 08/27/2013] [Indexed: 12/19/2022]
Abstract
Membranous nephropathy (MN), characterized by the presence of diffuse thickening of
the glomerular basement membrane and subepithelial in situ immune
complex disposition, is the most common cause of idiopathic nephrotic syndrome in
adults, with an incidence of 5-10 per million per year. A number of studies have
confirmed the relevance of several experimental insights to the pathogenesis of human
MN, but the specific biomarkers of MN have not been fully elucidated. As a result,
our knowledge of the alterations in histone methylation in MN is unclear. We used
chromatin immunoprecipitation followed by high-throughput sequencing (ChIP-seq) to
analyze the variations in a methylated histone (H3K9me3) in peripheral blood
mononuclear cells from 10 MN patients and 10 healthy subjects. There were 108 genes
with significantly different expression in the MN patients compared with the normal
controls. In MN patients, significantly increased activity was seen in 75 H3K9me3
genes, and decreased activity was seen in 33, compared with healthy subjects. Five
positive genes, DiGeorge syndrome critical region gene 6 (DGCR6), sorting nexin 16
(SNX16), contactin 4 (CNTN4), baculoviral IAP repeat containing 3 (BIRC3), and
baculoviral IAP repeat containing 2 (BIRC2), were selected and quantified. There were
alterations of H3K9me3 in MN patients. These may be candidates to help explain
pathogenesis in MN patients. Such novel findings show that H3K9me3 may be a potential
biomarker or promising target for epigenetic-based MN therapies.
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189
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Jiang L, Dai Y, Cui F, Pan Y, Zhang H, Xiao J, Xiaobing FU. Expression of cytokines, growth factors and apoptosis-related signal molecules in chronic pressure ulcer wounds healing. Spinal Cord 2013; 52:145-51. [DOI: 10.1038/sc.2013.132] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2013] [Revised: 09/10/2013] [Accepted: 10/02/2013] [Indexed: 11/09/2022]
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190
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Chen Z, Zhang Y, Jia C, Wang Y, Lai P, Zhou X, Wang Y, Song Q, Lin J, Ren Z, Gao Q, Zhao Z, Zheng H, Wan Z, Gao T, Zhao A, Dai Y, Bai X. mTORC1/2 targeted by n-3 polyunsaturated fatty acids in the prevention of mammary tumorigenesis and tumor progression. Oncogene 2013; 33:4548-57. [PMID: 24096482 DOI: 10.1038/onc.2013.402] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2013] [Revised: 07/21/2013] [Accepted: 08/23/2013] [Indexed: 12/17/2022]
Abstract
Although epidemiological and preclinical studies have shown the preventative effects of n-3 polyunsaturated fatty acids (PUFAs) on breast cancer, inconsistencies still remain in the data and the underlying mechanisms remain unclear. In this study, we identified mammalian target of rapamycin (mTOR) signaling, which plays an essential role in cell proliferation and breast tumorigenesis, as a target of n-3 PUFAs. In breast cancer cell lines, n-3 PUFAs rapidly and efficiently suppress both mTOR complex 1 (mTORC1) and mTORC2 and their downstream signaling, and subsequently inhibit cell proliferation and angiogenesis while promoting apoptosis. Further study indicates that stabilization of the mTOR-raptor complex by n-3 PUFAs may contribute to their inhibitory effect on mTORC1. Importantly, four complementary and well-controlled animal models were utilized to identify the role and molecular target of n-3 PUFAs in the prevention of breast carcinogenesis and progression, namely: (1) chemically induced mammary tumor rats with a high dietary intake of n-3 PUFAs; (2) nude mice implanted with mammary tumor cell lines stably expressing fat-1, a desaturase that catalyzes the conversion of n-6 to n-3 PUFAs and produces n-3 PUFAs endogenously; (3) fat-1 transgenic severe combined immune deficiency mice implanted with breast tumor cells; and (4) the fat-1 transgenic mouse mammary tumor virus-polyoma virus middle T oncogene double-hybrid mice, a model of aggressive breast cancer. In summary, dietary and endogenous n-3 PUFAs abrogate the activity of mTORC1/2 pathways in vitro and in vivo and prevent breast carcinogenesis, tumor growth and metastasis. Taken together, our findings convincingly clarify the causal relationship between n-3 PUFAs and breast cancer prevention and establish mTORC1/2 as a target of n-3 PUFAs.
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191
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Yu WP, Chen Y, Duan GM, Hu H, Ma HS, Dai Y. Patients' perceptions of day surgery: a survey study in China surgery. Hong Kong Med J 2013; 20:134-8. [PMID: 24096361 DOI: 10.12809/hkmj133966] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
OBJECTIVE To investigate patients' perceptions of day surgery, specifically their convenience; social, functional and economic values; risk perceptions; and patient satisfaction. DESIGN Cross-sectional questionnaire survey. SETTING West China Hospital in Chengdu City, China. PARTICIPANTS All the day-surgery patients admitted to the Centre for Day Surgery in December 2011. MAIN OUTCOME MEASURES Demographic profiles, each patient's value and risk perceptions about day surgery, as well as overall satisfaction with day surgery. RESULTS Convenience value and social value were emphasised by 87% and 60% of the 153 valid respondents, respectively. Comparatively speaking, functional and economic value were respectively chosen by 50% and 43% of the respondents, while 75% worried about postoperative complications and adverse events, only 53% and 27% worried about rehabilitation knowledge and psychological risks, respectively. More than 95% of the respondents were satisfied with the clinic service and staff attitudes, hospital surgery environment, operating skills and results, but fewer (84%) were satisfied with the communication processes surrounding day surgery. CONCLUSION Patients exhibited high acceptance and satisfaction regarding day surgery. The convenience experienced by patients and their families is the main perceived value of day surgery. Nevertheless, during the recovery process patients are concerned about possible adverse events, treatment of postoperative complications, and lack of information. These aspects of care delivery warrant improvement through redesign of the day surgery service.
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192
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Anand-Ivell R, Tremellen K, Dai Y, Heng K, Yoshida M, Knight PG, Hale GE, Ivell R. Circulating insulin-like factor 3 (INSL3) in healthy and infertile women. Hum Reprod 2013; 28:3093-102. [DOI: 10.1093/humrep/det349] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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193
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Hu X, Zhang F, Leak R, Zhang W, Iwai M, Stetler R, Dai Y, Zhao A, Gao Y, Chen J. Transgenic Overproduction of Omega-3 Polyunsaturated Fatty Acids Provides Neuroprotection and Enhances Endogenous Neurogenesis After Stroke. Curr Mol Med 2013; 13:1465-73. [DOI: 10.2174/15665240113139990075] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2011] [Revised: 02/17/2012] [Accepted: 06/10/2013] [Indexed: 11/22/2022]
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194
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Dai Y, Feng Y, Xu R, Xu W, Lu W, Wang J. Erratum to: Evaluation of interferon-gamma release assays for the diagnosis of tuberculosis: an updated meta-analysis. Eur J Clin Microbiol Infect Dis 2013. [DOI: 10.1007/s10096-013-1834-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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195
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Qiu J, Dai Y, Zhang XS, Chen GS. QSAR modeling of toxicity of acyclic quaternary ammonium compounds on Scenedesmus Quadricauda using 2D and 3D descriptors. BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2013; 91:83-88. [PMID: 23624598 DOI: 10.1007/s00128-013-1006-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2012] [Accepted: 04/18/2013] [Indexed: 06/02/2023]
Abstract
Optimized calculation of typical acyclic quaternary ammonium compounds (QACs) was performed at B3LYP/6-311G** level using density functional theory (DFT) method. A two- dimensional quantitative structure-activity relationship (2D-QSAR) model was established with the obtained structure parameters as theoretical descriptors. And then three-dimensional quantitative structure-activity relationship (3D-QSAR) models were built using comparative molecular field analysis (CoMFA) and comparative molecular similarity indices analysis (CoMSIA) methods respectively. The 2D and 3D QSAR models exhibit optimum stability and predictive ability, revealing that steric and electronic effects influence the toxicity of acyclic QACs to Scenedesmus Quadricauda mostly.
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196
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Lin H, Cai J, Dai Y, Jing J, Pei X, Cao R, Chen C. SU-E-T-21: A Grid Intensity-Based Dose Algorithm to Realize MLC Irregular and Inhomogeneous Field Modeling for Monte Carlo Clinical Application. Med Phys 2013. [DOI: 10.1118/1.4814455] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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197
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Dai Y, Lin H, Wu B, Cai J, Pei X, Cao R, Chen C. SU-E-T-19: Monte Carlo Simulation of XHA600D 6MV Linear Accelerator. Med Phys 2013. [DOI: 10.1118/1.4814453] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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198
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Shi FH, Cheng YS, Dai DZ, Peng HJ, Cong XD, Dai Y. Depressed calcium-handling proteins due to endoplasmic reticulum stress and apoptosis in the diabetic heart are attenuated by argirein. Naunyn Schmiedebergs Arch Pharmacol 2013; 386:521-31. [PMID: 23525487 DOI: 10.1007/s00210-013-0852-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2012] [Accepted: 03/11/2013] [Indexed: 12/27/2022]
Abstract
Diabetic cardiomyopathy (DC) is a unique disease frequently complicated to diabetes mellitus, manifesting endoplasmic reticulum (ER) stress and depressed calcium-handling proteins. We hypothesized that the abnormal FKBP12.6, SERCA2a, and CASQ2 are consequent to ER stress and apoptosis that are likely due to an entity of inflammation. These abnormalities may be attributed to reactive oxygen species genesis from activated NADPH oxidase which could respond to argirein (AR) through its anti-inflammatory activity. Sprague Dawley rats were randomly divided into six groups. Except the normal group, rats were injected with streptozotocin (STZ; 60 mg/kg, i.p.) once. During weeks 5 to 8 following STZ injection, rats were treated (in milligrams per kilogram per day, i.g.) with aminoguanidine (AMG, 100; an inducible nitric oxide synthase and AGEs inhibitor) or three doses of AR (50, 100, and 200). FKBP12.6, SERCA2a, and CASQ2 and ER stress chaperones Bip and PERK and apoptotic molecules were monitored in vivo and in vitro. Impaired cardiac performance and downregulated FKBP12.6, SERCA2a, and CASQ2 were significant in DC in vivo, and abnormal calcium-handling proteins were also found in high-glucose-incubated myocytes in vitro. ER stress manifested by upregulated Bip and PERK was predominant in association with DNA ladder and upregulated Bax and downregulated BCL-2 in vivo and in vitro. AR is effective to attenuate these abnormalities compared to AMG. Diabetic myocardium has inflammatory entity expressed as ER stress contributing to downregulated calcium-handling proteins. AR has potential in managing DC through attenuating depressed calcium-handling proteins, activated ER stress, and apoptosis in the myocardium.
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199
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Ye Y, Yan S, Jiang G, Zhou L, Xie H, Xie X, Yu X, Ding Y, Tian J, Dai Y, Zheng S. Galectin-1 prolongs survival of mouse liver allografts from Flt3L-pretreated donors. Am J Transplant 2013; 13:569-79. [PMID: 23356407 DOI: 10.1111/ajt.12088] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2012] [Revised: 11/08/2012] [Accepted: 11/08/2012] [Indexed: 01/25/2023]
Abstract
Liver allografts are spontaneously accepted across MHC barriers in mice. The mechanisms underlying this phenomenon remain poorly understood. Galectin-1, an endogenous lectin expressed in lymphoid organs, plays a vital role in maintaining central and peripheral tolerance. This study was to investigate the role of galectin-1 in spontaneous tolerance of liver allografts in mice, and to evaluate the therapeutic effects of galectin-1 on liver allograft rejection induced by donor Flt3L pretreatment. Blockade of the galectin-1 pathway via neutralizing antigalectin-1 mAb did not affect survival of the liver allografts from B6 donors into C3H recipients. Administration of rGal-1 significantly prolonged survival of liver allografts from Flt3L-pretreated donors and ameliorated Flt3L-triggered liver allograft rejection. This effect was associated with increased apoptosis of T cells in both allografts and spleens, decreased frequencies of Th1 and Th17 cells, decreased expression of Th1-associated cytokines (IL-12, IL-2 and IFN-γ), Th17-associated cytokines (IL-23 and IL-17) and granzyme B, in parallel with selectively increased IL-10 expression in liver allografts. In vitro, galectin-1 inhibited Flt3L-differentiated DC-mediated proliferation of allo-CD4(+) T cells and production of IFN-γ and IL-17. These data provide new evidence of the potential regulatory effects of galectin-1 in alloimmune responses in a murine model of liver transplantation.
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200
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Wang S, Li Q, Wang K, Dai Y, Yang J, Xue S, Han F, Zhang Q, Liu J, Wu W. Decreased expression of microRNA-31 associates with aggressive tumor progression and poor prognosis in patients with bladder cancer. Clin Transl Oncol 2013; 15:849-54. [PMID: 23408039 DOI: 10.1007/s12094-013-1014-4] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2013] [Accepted: 01/28/2013] [Indexed: 01/02/2023]
Abstract
PURPOSE MicroRNA-31 (miR-31) has different expression patterns in various human cancers. Especially in urothelial carcinoma of the bladder, it has been demonstrated to be decreased expression in the invasive tumors and homozygously deleted. However, its clinical significance in human bladder cancer has not yet been elucidated. Thus, the purpose of this study was to investigate the diagnostic and prognostic values of miR-31 in this disease. METHODS Expression levels of miR-31 in 126 pairs of bladder cancer and adjacent normal tissues were detected by real-time quantitative RT-PCR assay. To determine its prognostic value, overall survival (OS) and progression-free survival (PFS) were evaluated using the Kaplan-Meier method, and multivariate analysis was performed using the Cox proportional hazard analysis. RESULTS MiR-31 expression in bladder cancer tissues was significantly lower than those in adjacent normal tissues (mean expression level: 2.1 ± 0.9 vs. 3.8 ± 1.2, P < 0.001). When categorized into low vs. high expression, low miR-31 expression was negatively associated with the tumor stage (P = 0.02), the status of recurrence (P = 0.01), progression (P = 0.01), and death (P = 0.006) of patients with bladder cancer. Moreover, low miR-31 expression clearly predicted poorer PFS (P = 0.001) and OS (P < 0.001). In the multivariate analysis, low miR-31 expression was an independent prognostic factor for both PFS (P = 0.01) and OS (P = 0.008). CONCLUSION These findings show that miR-31 may contribute to the progression of bladder cancer and its downregulation may be independently associated with unfavorable PFS and OS, suggesting that miR-31 might be a promising marker for further risk stratification in the treatment of this cancer.
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