126
|
Chen H, Wei F, Wang L, Wang Z, Meng J, Jia L, Sun G, Zhang R, Li B, Yu H, Pang H, Bi X, Dong H, Jiang A, Wang L. MTHFR gene C677T polymorphism and type 2 diabetic nephropathy in Asian populations: a meta-analysis. Int J Clin Exp Med 2015; 8:3662-3670. [PMID: 26064261 PMCID: PMC4443095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2014] [Accepted: 03/05/2015] [Indexed: 06/04/2023]
Abstract
BACKGROUND Many studies have suggested a correlation between the C677T mutation in the methylenetetrahydrofolate reductase (MTHFR) gene and diabetic nephropathy (DN), but their results are inconclusive. METHODS To confirm this correlation, we performed a meta-analysis of 15 studies. The dichotomous data are presented as odds ratios (OR) with 95% confidence intervals (CI). RESULTS The results of this study suggested that the MTHFR 677 T allele was more likely to increase the risk of DN in Asian (OR = 1.466, 95% CI = 1.143-1.880, P = 0.003), West Asian (OR = 1.750, 95% CI = 1.150-2.664, P = 0.009), and Chinese populations (OR = 2.162, 95% CI = 1.719-2.719, P = 0.001), but not in East Asian or Japanese populations. The carriers of the MTHFR 677 T allele were associated with progression of DN in the "5-10 year duration" group, but not in the "> 10 year duration" group (OR = 2.187, 95% CI = 1.787-2.677, P = 0.001). CONCLUSION Development of DN is associated with MTHFR C677T polymorphisms in Asian populations, especially in early type 2 diabetes.
Collapse
|
127
|
Liu L, Xu X, Jia L, Wei M, Qian B, Wu Y, Shen Y, Wang X, Pei H, Chen X. Primary fallopian tube carcinoma--a retrospective analysis of 66 cases. EUR J GYNAECOL ONCOL 2015; 36:161-167. [PMID: 26050354] [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
BACKGROUND Primary fallopian tube carcinoma (PFTC) is a rare malignant gynecologic oncology. There was no consensus on the outcome related clinicopathological characteristics. Present study aims to determine the prognosis associate factors in PFTC. MATERIALS AND METHODS In this retrospective study, the authors identified 50 PFTC patients in Jiangsu Institute of Cancer Research and 16 cases in the Affiliated People's Hospital of Inner Mongolia Medical College between 1988 and 2013. Disease surveillance was conducted based on the follow-up protocol of MD Anderson Cancer Center. Cox proportional hazards model and log-rank test were used to assess the associations between potential clinicpathologic characteristics and the survival durations. RESULTS The median progression free survival (PFS) and overall survival (OS) of PFTC were 36.9 and 62.7 months, respectively. FIGO Stage (p < 0.01, 0.01), grade (p = 0.02, 0.03), tumor residual after initial debulking surgery (p = 0.05, 0.01), nadir CA-125 (p = 0.01, 0.01) were independently related with PFS and OS. The PFS and OS of patients with Stage II PFTC were similar as those with Stage III-IV (30.7 vs 28.3 and 61.9 vs 49.2 months, respectively) but poorer than those of Stage I cases (N/A). The PFS of patients with paclitaxel-based chemotherapy was longer than those with other regime (51.3 vs 33.1 months), but not OS (62.7 vs 42.6 months). The outcome of patients underwent optimal initial cytoreduction surgery was better than those of suboptimal ones (PFS 56.4 vs 21.2 months and OS 65.3 vs 47.9 months, respectively). CONCLUSIOn: PFTC patients with FIGO Stage II disease should be regarded as advanced disease. Paclitaxel based chemotherapy was associated with longer PFS but not OS in PFTC.
Collapse
|
128
|
Chen S, Zhang Q, Jia L, Du X, Hanagata N. A facilely controlled length, cytotoxicity, length-dependent and cell type-dependent cellular uptake of silica nanotubes and their applications in the delivery of immunostimulatory CpG oligodeoxynucleotides. J Mater Chem B 2015; 3:7246-7254. [DOI: 10.1039/c5tb01270h] [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]
Abstract
Silica nanotubes were synthesized via an acid-degradation collagen template route and then functionalized with chitosan to deliver immunostimulatory CpG-ODN.
Collapse
|
129
|
Jia L, Meng Q, Yuan B, Fang L. Effects of Drug Cost Sharing Policy on the Drug Use, Financial Risks and Moral Hazard for the Health Insurance Beneficiaries. VALUE IN HEALTH : THE JOURNAL OF THE INTERNATIONAL SOCIETY FOR PHARMACOECONOMICS AND OUTCOMES RESEARCH 2014; 17:A795. [PMID: 27202980 DOI: 10.1016/j.jval.2014.08.459] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
|
130
|
Jia L, Guo L, Zhu J, Ma Y. Stability and cytocompatibility of silk fibroin-capped gold nanoparticles. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2014; 43:231-6. [DOI: 10.1016/j.msec.2014.07.024] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2014] [Revised: 05/23/2014] [Accepted: 07/03/2014] [Indexed: 01/02/2023]
|
131
|
Zhao H, Zhu W, Jia L, Chen G, Li H, Xie P, Xing L, Yu J. A Phase I Study of Adjuvant Radiotherapy with Sprayed Epigallocatechin-3-gallate Protection in Patients with Breast Cancer Treated with Modified Radical Mastectomy. Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2014.05.177] [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]
|
132
|
Jia L, Yue CM, Fang C. Blastocyst morphology grade does not influence the abortion rate of frozen-thawed single blastocyst transfer. Fertil Steril 2014. [DOI: 10.1016/j.fertnstert.2014.07.773] [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]
|
133
|
Liu Y, Jia L, Huang MJ, Gu ZM. Thelohanellus testudineus n. sp. (Myxosporea: Bivalvulida) infecting the skin of allogynogenetic gibel carp Carassius auratus gibelio (Bloch) in China. JOURNAL OF FISH DISEASES 2014; 37:535-542. [PMID: 23952737 DOI: 10.1111/jfd.12141] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2013] [Revised: 05/12/2013] [Accepted: 05/15/2013] [Indexed: 06/02/2023]
Abstract
A Thelohanellus species was encountered during a survey on Thelohanellus diversity of Carassius auratus gibelio (Bloch) in China. The infection is characterized by the presence of large cysts of 1.4-3.2 cm in diameter in the skin of host. Mature spores were ampullaceous in frontal view and testudinate in lateral view, measuring 19.7 ± 0.7 (18.6-20.8) μm long, 7.6 ± 0.4 (6.6-8.4) μm wide and 7.3 ± 0.5 (6.6-8.8) μm thick. The single polar capsule was elongated pyriform, with 11.1 ± 0.5 (10.0-11.9) μm long and 5.3 ± 0.3 (4.3-5.8) μm wide. Polar filaments coiled with 7-8 turns. Scanning electron microscopy revealed a smooth spore surface with flat side and convex side. The sutural line was straight or 'S' like, running near the middle of the valves. Histologically, the large cysts consisting of numerous small plasmodia developed in the dermis of the skin. The BLAST search indicated that the newly obtained ssrRNA gene sequences did not match any available sequences in GenBank and phylogenetic analysis placed it in the Thelohanellus clade. Based on morphology and molecular differences with reported Thelohanellus spp., this parasite was described as a new species of genus Thelohanellus.
Collapse
|
134
|
Jia L, Xu L, Wang Z, Xu J, Ji J. Cover Picture: Label-free Fluorescent Sensor for Probing Heparin-Protein Interaction Based on Supramolecular Assemblies (Chin. J. Chem. 1/2014). CHINESE J CHEM 2014. [DOI: 10.1002/cjoc.201490000] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
135
|
Wang L, Chopp M, Szalad A, Zhang Y, Wang X, Zhang RL, Liu XS, Jia L, Zhang ZG. The role of miR-146a in dorsal root ganglia neurons of experimental diabetic peripheral neuropathy. Neuroscience 2013; 259:155-63. [PMID: 24316060 DOI: 10.1016/j.neuroscience.2013.11.057] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2013] [Revised: 10/22/2013] [Accepted: 11/26/2013] [Indexed: 01/05/2023]
Abstract
Sensory neurons mediate diabetic peripheral neuropathy. Using a mouse model of diabetic peripheral neuropathy (BKS.Cg-m+/+Lepr(db)/J (db/db) mice) and cultured dorsal root ganglion (DRG) neurons, the present study showed that hyperglycemia downregulated miR-146a expression and elevated interleukin-1 receptor-activated kinase (IRAK1) and tumor necrosis factor receptor-associated factor 6 (TRAF6) levels in DRG neurons. In vitro, elevation of miR-146a by miR-146a mimics in DRG neurons increased neuronal survival under high-glucose conditions. Downregulation and elevation of miR-146a in DRG neurons, respectively, were inversely related to IRAK1 and TRAF6 levels. Treatment of diabetic peripheral neuropathy with sildenafil, a phosphodiesterase type 5 inhibitor, augmented miR-146a expression and decreased levels of IRAK1 and TRAF6 in the DRG neurons. In vitro, blockage of miR-146a in DRG neurons abolished the effect of sildenafil on DRG neuron protection and downregulation of IRAK1 and TRAF6 proteins under hyperglycemia. Our data provide the first evidence showing that miR-146a plays an important role in mediating DRG neuron apoptosis under hyperglycemic conditions.
Collapse
|
136
|
Yan Z, Zeng L, Li Z, Zhang H, Chen W, Jia L, Chen C, Cheng H, Cao J, Xu K. Bone marrow-derived endothelial progenitor cells promote hematopoietic reconstitution after hematopoietic stem cell transplantation. Transplant Proc 2013; 45:427-33. [PMID: 23375333 DOI: 10.1016/j.transproceed.2012.03.064] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2011] [Revised: 02/18/2012] [Accepted: 03/06/2012] [Indexed: 12/13/2022]
Abstract
OBJECTIVE A hematopoietic deficit is a serious complication after hematopoietic stem cell transplantation. It has been shown that fetal blood-derived endothelial progenitor cells (EPCs) can promote hematopoietic reconstitution after transplantation. This study investigated whether EPCs from bone marrow (BM) of adult mice could promote hematopoietic reconstitution. METHODS Lethally irradiated BALB/c mice were administered BM cells or BM cells plus EPCs. RESULTS The results showed that EPC-treated mice displayed accelerated recovery of peripheral blood white blood cells and reticulocytes. But the platelets were not significantly different with versus without EPCs. Accelerated recovery of BM sinusoidal vessels, promotion of stem cell implantation, and decreased adipocyte formation were associated with the mechanism. Systemic administration of anti-vascular endothelial cadherin antibody neutralized these effects significantly. CONCLUSION These data showed that BM-derived EPC infusions augmented hematopoiesis suggesting a new approach to promote hematopoiesis.
Collapse
|
137
|
Zhou H, Ma H, Wei W, Ji D, Song X, Sun J, Zhang J, Jia L. B4GALT family mediates the multidrug resistance of human leukemia cells by regulating the hedgehog pathway and the expression of p-glycoprotein and multidrug resistance-associated protein 1. Cell Death Dis 2013; 4:e654. [PMID: 23744354 PMCID: PMC3698553 DOI: 10.1038/cddis.2013.186] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
β-1, 4-Galactosyltransferase gene (B4GALT) family consists of seven members, which encode corresponding enzymes known as type II membrane-bound glycoproteins. These enzymes catalyze the biosynthesis of different glycoconjugates and saccharide structures, and have been recognized to be involved in various diseases. In this study, we sought to determine the expressional profiles of B4GALT family in four pairs of parental and chemoresistant human leukemia cell lines and in bone marrow mononuclear cells (BMMC) of leukemia patients with multidrug resistance (MDR). The results revealed that B4GALT1 and B4GALT5 were highly expressed in four MDR cells and patients, altered levels of B4GALT1 and B4GALT5 were responsible for changed drug-resistant phenotype of HL60 and HL60/adriamycin-resistant cells. Further data showed that manipulation of these two gene expression led to increased or decreased activity of hedgehog (Hh) signaling and proportionally mutative expression of p-glycoprotein (P-gp) and MDR-associated protein 1 (MRP1) that are both known to be related to MDR. Thus, we propose that B4GALT1 and B4GALT5, two members of B4GALT gene family, are involved in the development of MDR of human leukemia cells, probably by regulating the activity of Hh signaling and the expression of P-gp and MRP1.
Collapse
|
138
|
Chen MQ, Xu XX, Jia L, Jia PC, Yang F. ANALYSIS OF MOISTURE MIGRATION OF TYPICAL MSW MATRICES AT MEDIUM TEMPERATURE. CHEM ENG COMMUN 2013. [DOI: 10.1080/00986445.2012.717312] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
139
|
Jia L, Xu L, Wang Z, Xu J, Ji J. Label-free Fluorescent Sensor for Probing Heparin-Protein Interaction Based on Supramolecular Assemblies. CHINESE J CHEM 2013. [DOI: 10.1002/cjoc.201300086] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
140
|
Liu P, Sun Y, He Y, Wang Z, Wang N, Jia L, Zheng X, Loo W, Chow L, Chen J. AOSP42 IDENTIFICATION OF RISK FACTORS FOR EMOTIONAL DISORDERS AMONG CHINESE WOMEN FOLLOWING BREAST CANCER SURGERY. Eur J Cancer 2013. [DOI: 10.1016/s0959-8049(13)70053-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
141
|
Fu Y, Hou X, Jia L, Qin Q, Meng H, Li T. 1418 – How do the genetic and environmental factor influence the mental health of chongqing twins children. Eur Psychiatry 2013. [DOI: 10.1016/s0924-9338(13)76453-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
|
142
|
Shen Y, Yang T, Jia L, Wang T, Chen L, Wan C, Wang L, Yan Y, Yi Q. A potential role for D-dimer in the diagnosis of tuberculous pleural effusion. EUROPEAN REVIEW FOR MEDICAL AND PHARMACOLOGICAL SCIENCES 2013; 17:201-205. [PMID: 23377808] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
BACKGROUND AND OBJECTIVES Tuberculous pleural effusion (TPE) is associated with enhanced local fibrinolysis; however, its role in TPE has not been studied. The present study aims to investigate whether pleural D-dimer, a fibrinolysis marker, plays a diagnostic role for TPE. PATIENTS AND METHODS Patients with pleural effusion were recruited prospectively. All subjects underwent a standard thoracocentesis and pleural effusion samples were collected. The diagnosis of pleural effusion was based on clinical, radiological, bacteriological, and histopathological examinations. Pleural D-dimer levels were measured by immunonephelometry assay. The capacity of pleural D-dimer to differentiate TPE from non-TPE was assessed with receiver operating characteristic curve analyses. RESULTS A total of 87 patients with pleural effusion were included in the study (32 TPE cases and 55 non-TPE controls). Subjects with TPE showed a marked elevation of pleural D-dimer than those with other etiologies (1082.66±453.83 vs. 319.98±266.78 mg/L FEU, p < 0.05). The area under curve when pleural D-dimer was used to differentiate TPE from non-TPE was 0.928 (95% confidence interval: 0.878-979). With a cut-off value of 622.5 mg/L FEU, the sensitivity and specificity were 84.38% and 85.45%, respectively. CONCLUSIONS Pleural D-dimer levels are higher in TPE than other causes of pleural effusions. D-dimer might be useful as a simple, surrogate marker for TPE. Further studies are needed to confirm our findings.
Collapse
|
143
|
Fu Y, Hou X, Qin Q, Jia L, Meng H, Li T. 1433 – Study on the influence of genetic and environmental factor on personality of chongqing twins children. Eur Psychiatry 2013. [DOI: 10.1016/s0924-9338(13)76466-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
|
144
|
Li J, Jia L, Zhao P, Jiang Y, Zhong S, Chen D. Stable knockdown of clusterin by vectorbased RNA interference in a human breast cancer cell line inhibits tumour cell invasion and metastasis. J Int Med Res 2012; 40:545-55. [PMID: 22613415 DOI: 10.1177/147323001204000216] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVE Overexpression of the clusterin (CLU) gene occurs in breast cancer and is associated with lymph node metastasis. The present study explored the effect of CLU silencing on invasion and metastasis, and the relationship between CLU expression and the extracellular signal-regulated kinase (ERK) / matrix metalloproteinase-9 (MMP) signalling pathway in human breast cancer cells. METHODS A pcDNA3.1-based RNA interference approach was used to knockdown the CLU gene in MDA-231 cells (MDA-231-CLUi); control MDA-231 cells were transfected with an empty vector (MDA-231-Vec). Reverse transcription-polymerase chain reaction was used to assess CLU and MMP-9 mRNA levels, and Western blotting was used to analyse CLU, MMP-9 and ERK protein levels. Metastatic potential was evaluated using in vitro and in vivo models of invasion and metastasis. RESULTS Compared with MDA-231-Vec cells, the MDA-231-CLUi cells demonstrated reduced migration and invasion in vitro and decreased metastatic potential in vivo. Reintroduction and reexpression of the CLU gene into the MDA-231-CLUi cells restored the invasive phenotype. MMP-9 mRNA and protein levels were reduced in MDA-231-CLUi cells, and there was a correlation between activated ERK and CLU and MMP-9 protein levels. CONCLUSION CLU may regulate the aggressive behaviour of human breast cancer cells through modulation of ERK signalling and MMP9 expression.
Collapse
|
145
|
Jia L, Shu DJ, Wang M. Tuning the area percentage of reactive surface of TiO2 by strain engineering. PHYSICAL REVIEW LETTERS 2012; 109:156104. [PMID: 23102340 DOI: 10.1103/physrevlett.109.156104] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2012] [Indexed: 06/01/2023]
Abstract
Surfaces with high reactivity usually have a low area percentage, which greatly limits the efficiency of surface reactivity. In this Letter we demonstrate a generic way of increasing the percentage of the highly reactive surface by using external strain. Bulk and surface elastic properties of TiO2 are studied via density functional theory calculations. The equilibrium shape of anatase TiO2 under applied strain is discussed based on the elastic properties. We find that when 5% compressive strain is applied biaxially along [100] and [010]; directions, the area percentage of the anatase (001) surface can be increased by ~5 times in comparison with the case when no strain is applied. Since the moderate strain does not introduce extrinsic defects into the material, we propose that it is an ideal way to increase the reactivity of titanium dioxide crystallites by applying biaxial compressive external strain along the a axis.
Collapse
|
146
|
Zhao Y, Xiong X, Jia L, Sun Y. Targeting Cullin-RING ligases by MLN4924 induces autophagy via modulating the HIF1-REDD1-TSC1-mTORC1-DEPTOR axis. Cell Death Dis 2012; 3:e386. [PMID: 22951983 PMCID: PMC3461362 DOI: 10.1038/cddis.2012.125] [Citation(s) in RCA: 111] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
MLN4924, a newly discovered small molecule inhibitor of NEDD8-activating enzyme (NAE), inactivates Cullin-RING E3 ubiquitin Ligases (CRLs) by blocking cullin neddylation. As a result, MLN4924 causes accumulation of several key substrates of CRLs and effectively suppresses tumor cell growth by inducing apoptosis and senescence. However, the role of MLN4924 in induction of autophagy and its biological significance are totally unknown. Here we showed that MLN4924 effectively induces autophagy in both time- and dose-dependent manners in multiple human cancer lines, indicating a general phenomenon. Mechanistically, by inactivating CRLs, MLN4924 causes accumulation of DEPTOR and HIF1α. The siRNA knockdown and gene KO studies showed that DEPTOR and the HIF1-REDD1-TSC1 axis are responsible for MLN4924-induced autophagy via inhibiting mTORC1. Biologically, autophagy is a survival signal to tumor cells, and blockage of autophagy via siRNA knockdown, gene KO and small molecule inhibitor remarkably enhanced MLN4924-induced apoptosis. Our study reveals an uncharacterized mechanism of MLN4924 action and provides the proof-of-concept evidence for strategic drug combination of MLN4924 with an autophagy inhibitor for maximal killing of tumor cells via enhancing apoptosis.
Collapse
|
147
|
Yang D, Li L, Liu H, Wu L, Luo Z, Li H, Zheng S, Gao H, Chu Y, Sun Y, Liu J, Jia L. Induction of autophagy and senescence by knockdown of ROC1 E3 ubiquitin ligase to suppress the growth of liver cancer cells. Cell Death Differ 2012; 20:235-47. [PMID: 22935614 DOI: 10.1038/cdd.2012.113] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
Regulator of Cullins-1 (ROC1) or RING box protein-1 (RBX1) is an essential RING component of Cullin-RING ligase (CRL). Our previous studies showed that ROC1 is required for the growth of several cancer cell lines while ROC1 siRNA silencing inactivates CRL, leading to cell cycle arrest, cell senescence and/or apoptosis. However, it is completely unknown whether ROC1 knockdown triggers autophagic response by inactivating CRL. Moreover, the role of ROC1 in liver cancer remains elusive. In this study, we reported that ROC1 knockdown significantly inhibited the growth of liver cancer cells by sequentially and independently inducing autophagy and p21-dependent cell senescence. Mechanism analysis revealed that ROC1 silencing triggered autophagy by inhibition of mammalian target of rapamycin (mTOR) activity due to accumulation of mTOR-inhibitory protein Deptor, a substrate of CRL. Consistently, Deptor knockdown significantly blocked autophagy response upon ROC1 silencing. Biologically, autophagy response upon ROC1 silencing was a survival signal, and blockage of autophagy pathway sensitized cancer cells to apoptosis. Finally, we demonstrated that ROC1 was overexpressed in hepatocellular carcinomas, which is associated with poor prognosis of liver cancer patients. These findings suggest that ROC1 is an appealing drug target for liver cancer and provide a proof-of-concept evidence for a novel drug combination of ROC1 inhibitor and an autophagy inhibitor for effective treatment of liver cancer by enhancing apoptosis.
Collapse
|
148
|
Xie K, Jia L, Xu D, Guo H, Xie X, Huang Y, Chen X, Bao W, Dai G, Wang J. Simultaneous Determination of Amoxicillin and Ampicillin in Eggs by Reversed-Phase High-Performance Liquid Chromatography with Fluorescence Detection using Pre-Column Derivatization. J Chromatogr Sci 2012; 50:620-4. [DOI: 10.1093/chromsci/bms052] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
|
149
|
Qiu S, Xu X, Wang Y, Yang G, Wang Z, Wang H, Zhang L, Liu N, Chen C, Liu W, Li J, Su W, Jia L, Wang L, Jin H, Keim P, Yuan Z, Huang L, Song H. Emergence of resistance to fluoroquinolones and third-generation cephalosporins in Shigella flexneri subserotype 1c isolates from China. Clin Microbiol Infect 2012; 18:E95-8. [PMID: 22329572 DOI: 10.1111/j.1469-0691.2012.03768.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
We report here on the first identification of Shigella flexneri subserotype 1c in China. We also report the emergence of resistance to ciprofloxacin and third-generation cephalosporins in this subserotype 1c for the first time. Isolates of seven strains circulating in China yielded three new sequence types and seven pulsed-field gel electrophoresis patterns, thus demonstrating the existence of high genetic diversity within the isolates. Overall, the seven isolates showed reduced susceptibility to ciprofloxacin; one isolate was ciprofloxacin resistant, whilst another developed resistance to ciprofloxacin, norfloxacin, cefotaxime and ceftriaxone.
Collapse
|
150
|
Zhang J, Bao X, Cao G, Jiang S, Zhu X, Lu H, Jia L, Pan H, Fehr S, Davis M, Leonard H, Ravine D, Wu X. What does the nature of the MECP2 mutation tell us about parental origin and recurrence risk in Rett syndrome? Clin Genet 2012; 82:526-33. [PMID: 22182064 DOI: 10.1111/j.1399-0004.2011.01838.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The MECP2 mutations occurring in the severe neurological disorder Rett syndrome are predominantly de novo, with rare familial cases. The aims of this study were to provide a precise estimate of the parental origin of MECP2 mutations using a large Chinese sample and to assess whether parental origin varied by mutation type. The parental origin was paternal in 84/88 [95.5%, (95% confidence interval 88.77-98.75)] of sporadic Chinese cases. However, in a pooled sample including data from the literature the spectrum of mutations occurring on maternally and paternally derived chromosomes differed significantly. The excess we found of 'single base pair gains or losses' on maternally derived MECP2 gene alleles suggests that this mutational category is associated with an elevated risk of gonadal mosaicism, which has implications for genetic counseling.
Collapse
|