676
|
Liu T, Shang SJ, Liu B, Wang CH, Wang YS, Xiong W, Zheng LH, Zhang CX, Zhou Z. Two distinct vesicle pools for depolarization-induced exocytosis in somata of dorsal root ganglion neurons. J Physiol 2011; 589:3507-15. [PMID: 21646411 DOI: 10.1113/jphysiol.2011.208777] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
The somata of dorsal root ganglion (DRG) neurons release neurotransmitters and neuropeptides. In addition to the conventional Ca2+-dependent secretion (CDS), Ca2+-independent but voltage-dependent secretion (CIVDS) also occurs in the somata of DRG neurons. Electrical stimulation induces both CDS and CIVDS, which differ in size and are coupled with different types of endocytosis contributed by CIVDS and CDS, respectively. However, it is unclear whether they use a common vesicle pool, so we investigated the relationship between the vesicle pools of CDS and CIVDS. Membrane capacitance recording and photolysis of a caged-Ca2+ compound showed that, in low external Ca2+ solutions, the depolarization-induced exocytosis contained two (fast and slow) phases, which were contributed by CIVDS and CDS, respectively. Depletion of the CDS readily releasable pool using photolysis did not affect the CIVDS. When the CIVDS and CDS vesicle pools were depleted by electrical stimulation, the pools had different sizes. Their kinetics of exocytosis-coupled endocytosis were also different. Thus, CIVDS and CDS used different vesicle pools in DRG neurons.
Collapse
|
677
|
Sun L, Hu H, Peng L, Zhou Z, Zhao X, Pan J, Sun L, Yang Z, Ran Y. P-cadherin promotes liver metastasis and is associated with poor prognosis in colon cancer. THE AMERICAN JOURNAL OF PATHOLOGY 2011; 179:380-90. [PMID: 21703417 DOI: 10.1016/j.ajpath.2011.03.046] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2010] [Revised: 02/28/2011] [Accepted: 03/02/2011] [Indexed: 02/08/2023]
Abstract
P-cadherin belongs to the family of classic cadherins, which is important for maintaining cellular localization and tissue integrity. Recently, it has become evident that P-cadherin contributes to the oncogenesis of many tumor types, including melanoma, prostate, breast, and colon carcinomas. Although cadherin switching is a crucial step in metastasis, the role of P-cadherin in colon cancer metastasis to the liver is unknown. In this study, we performed gene expression analysis and found that the level of P-cadherin was higher in tissue from liver metastases of colon cancer than in the corresponding primary colon cancer tissues. IHC analysis also showed that P-cadherin expression was significantly higher in liver metastases than in paired primary colorectal cancer tumors. Knockdown of P-cadherin in colon cancer cells inhibited wound healing, proliferation, and colony formation and resulted in developing fewer liver metastatic foci and reducing the tumor burden in vivo. Inhibition of P-cadherin expression also induced the up-regulation of E-cadherin and the down-regulation of β-catenin and its downstream target molecules, including survivin and c-Myc. In summary, these results uncover a novel function of P-cadherin in the regulation of colon cancer metastasis to the liver, suggesting that blocking the activity of P-cadherin or its associated signaling may be a valuable target for the treatment of hepatic metastases of colon carcinomas.
Collapse
|
678
|
Smith JK, Dimick J, Witkowski ER, Ragulin-Coyne E, McDade TP, Ng SC, Zhou Z, Tseng JF. Does insurance coverage affect pancreatic cancer survival? The Medicare age threshold. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.6124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
|
679
|
Ge M, Li JW, Liu L, Zhou Z. Template-Free Synthesis and Photocatalytic Application of Rutile TiO2 Hierarchical Nanostructures. Ind Eng Chem Res 2011. [DOI: 10.1021/ie1023113] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
680
|
Wu W, Shen O, Qin Y, Lu J, Niu X, Zhou Z, Lu C, Xia Y, Wang S, Wang X. Methylenetetrahydrofolate reductase C677T polymorphism and the risk of male infertility: a meta-analysis. ACTA ACUST UNITED AC 2011; 35:18-24. [PMID: 21535009 DOI: 10.1111/j.1365-2605.2011.01147.x] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Several molecular epidemiological studies have been conducted to examine the association between MTHFR C677T polymorphism and male infertility susceptibility, but the results remain inconsistent. To derive a more precise estimation of the relationship, a meta-analysis was performed. A total of 10 case-control studies, including 2275 cases and 1958 controls, were selected. Crude odds ratios (ORs) with 95% confidence intervals were used to assess the strength of association in the additive model, dominant model and recessive model. In the overall analysis, no significant association between the polymorphism and risk of male infertility was observed. Stratified analysis showed that significantly strong association between MTHFR C677T polymorphism and male infertility were present only in Asians (OR = 1.79 for TT vs. CC genotype; OR = 1.42 for CT/TT vs. CC genotype; OR = 1.50 for TT vs. CC/CT genotype; OR = 1.36 for T vs. C allele), but not in Caucasians. Additionally, MTHFR 677T was associated with a significant increase in the risk of azoospermia in all genetic models. No significantly increased risks of oligoasthenoteratozoospermia were found in any of the genetic models. In conclusion, this meta-analysis supports that MTHFR C677T polymorphism is capable of causing male infertility susceptibility in Asians, but not in Caucasians.
Collapse
|
681
|
Zhou Z, Lu Y, Deng W, Huang P, Li LY. Abstract 1112: Human rhomboid family-1 gene RHBDF1 assists trafficking of TGFa for GPCR-mediated transactivation of EGFR. Cancer Res 2011. [DOI: 10.1158/1538-7445.am2011-1112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Epidermal growth factor receptor (EGFR) can be transactivated by ligands of G protein-coupled receptors (GPCR). GPCR signaling pathways often involve the formation of clathrin-coated endosomes, which interact with endoplasmic reticulum/Golgi complex to form recycling endosome and secretion vesicles containing EGFR pro-ligands such as pro-TGFα, which is proteolytically processed and released on the cell surface to activate EGFR in an autocrine manner. We showed previously that human rhomboid family-1 gene RHBDF1 is essential for GPCR-EGFR transactivation by assisting the secretion of TGFα, a ligand of EGFR. We show here silencing the RHBDF1 with shRNA leads to inhibition of EGFR ligand-dependent transactivation induced by GPCR ligands such as gastrin release peptide (GRP) and sphingosine-1-phosphate. However, RHBDF1 is not involved in EGFR ligand-independent GPCR-EGFR transactivation induced by isoproterenol. Inhibitors of endosome formation and membrane trafficking such as chlorpromazine, nocodazole, and cytochalasin-D also inhibit GRP-induced EGFR phosphorylation. Inhibitors of endosome acidification such as chloroquine and BFA lessen the inhibitory effect of RHBDF1 shRNA on GRP-induced EGFR phosphorylation. The RHBDF1 protein localizes mainly to the endoplasmic reticulum with pro-TGFα and GRASP55 in starved, quiescent cancer cells, but is phosphorylated and translocated to the cell surface upon GPCR ligands stimulation. GPCR ligands also activate the intracellular signaling molecule Src which then co-translocates with RHBDF1 and clathrin to the plasma membrane. Src-clathrin interaction and co-localization to the cell surface are RHBDF1-dependent. These findings are consistent with the view that, in response to GPCR activation, RHBDF1 assists pro-TGFα trafficking to the cell surface through clathrin coated trafficking.
Citation Format: {Authors}. {Abstract title} [abstract]. In: Proceedings of the 102nd Annual Meeting of the American Association for Cancer Research; 2011 Apr 2-6; Orlando, FL. Philadelphia (PA): AACR; Cancer Res 2011;71(8 Suppl):Abstract nr 1112. doi:10.1158/1538-7445.AM2011-1112
Collapse
|
682
|
Wielpütz MO, Eichinger M, Zhou Z, Leotta K, Hirtz S, Bartling SH, Semmler W, Kauczor HU, Puderbach M, Mall MA. In vivo monitoring of cystic fibrosis-like lung disease in mice by volumetric computed tomography. Eur Respir J 2011; 38:1060-70. [PMID: 21478215 DOI: 10.1183/09031936.00149810] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
The onset and spontaneous development of cystic fibrosis (CF) lung disease remain poorly understood. In the present study, we used volumetric computed tomography (VCT) as a new method for longitudinal in vivo monitoring of early lesions and disease progression in CF-like lung disease in β-epithelial Na(+) channel (ENaC)-transgenic (TG) mice. Using a VCT scanner prototype (80 kV, 50 mA·s, scan time 19 s and spatial resolution 200 μm), βENaC-TG mice and wild-type (WT) littermates were examined longitudinally at 10 time-points from neonatal to adult ages, and VCT images were assessed by qualitative and quantitative morphological parameters. We demonstrate that VCT detected early-onset airway mucus obstruction, diffuse infiltrates, atelectasis and air trapping as characteristic abnormalities in βENaC-TG mice. Furthermore, we show that early tracheal mucus obstruction predicted mortality in βENaC-TG mice and that the density of lung parenchyma was significantly reduced at all time-points in βENaC-TG compared with WT mice (median ± sem -558 ± 8 HU in WT versus -686 ± 16 HU in βENaC-TG at 6 weeks of age; p < 0.005). Our study demonstrates that VCT is a sensitive, noninvasive technique for early detection and longitudinal monitoring of morphological abnormalities of CF-like lung disease in mice, and may thus provide a useful tool for pre-clinical in vivo evaluation of novel treatment strategies for CF.
Collapse
|
683
|
Yuan SM, Li JX, Yang LT, Su LW, Liu L, Zhou Z. Preparation and lithium storage performances of mesoporous Fe₃O₄@C microcapsules. ACS APPLIED MATERIALS & INTERFACES 2011; 3:705-709. [PMID: 21361300 DOI: 10.1021/am1010095] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Fe(3)O(4)@C microcapsules were prepared using carbon-coated α-FeOOH nanorods as precursors, which were synthesized via two-step hydrothermal reactions. During the subsequent sintering procedure, α-FeOOH was reduced to Fe(3)O(4) by carbon, accompanied by the formation of mesopores. In Fe(3)O(4)@C microcapsules, mesoporous Fe(3)O(4) nanorods are coated with amorphorous carbon layers. The Fe(3)O(4)/C composites with such special structures demonstrate high specific capacity and good cyclic stability as anode materials in Li test cells.
Collapse
|
684
|
Zhang B, Sun L, Yang YM, Huang HP, Zhu FP, Wang L, Zhang XY, Guo S, Zuo PL, Zhang CX, Ding JP, Wang LY, Zhou Z. Action potential bursts enhance transmitter release at a giant central synapse. J Physiol 2011; 589:2213-27. [PMID: 21486773 DOI: 10.1113/jphysiol.2010.200154] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
Patterns of action potentials (APs), often in the form of bursts, are critical for coding and processing information in the brain. However, how AP bursts modulate secretion at synapses remains elusive. Here, using the calyx of Held synapse as a model we compared synaptic release evoked by AP patterns with a different number of bursts while the total number of APs and frequency were fixed. The ratio of total release produced by multiple bursts to that by a single burst was defined as 'burst-effect'.We found that four bursts of 25 stimuli at 100 Hz increased the totalcharge of EPSCs to 1.47 ± 0.04 times that by a single burst of 100 stimuli at the same frequency.Blocking AMPA receptor desensitization and saturation did not alter the burst-effect, indicating that it was mainly determined by presynaptic mechanisms. Simultaneous dual recordings of presynaptic membrane capacitance (Cm) and EPSCs revealed a similar burst-effect, being 1.58±0.13by Cm and 1.49±0.05 by EPSCs. Reducing presynapticCa2+ influx by lowering extracellular Ca2+concentration or buffering residual intracellular Ca2+ with EGTA inhibited the burst-effect. We further developed a computational model largely recapitulating the burst-effect and demonstrated that this effect is highly sensitive to dynamic change in availability of the releasable pool of synaptic vesicles during various patterns of activities. Taken together, we conclude that AP bursts modulate synaptic output mainly through intricate interaction between depletion and replenishment of the large releasable pool. This burst-effect differs from the somatic burst-effect previously described from adrenal chromaffin cells, which substantially depends on activity-induced accumulation of Ca2+ to facilitate release of a limited number of vesicles in the releasable pool. Hence, AP bursts may play an important role in dynamically regulating synaptic strength and fidelity during intense neuronal activity at central synapses.
Collapse
|
685
|
Chen L, Zhou Z, Shen M, Ma A. Simultaneous Determination and Pharmacokinetic Study of Metformin and Rosiglitazone in Human Plasma by HPLC-ESI-MS. J Chromatogr Sci 2011; 49:94-100. [DOI: 10.1093/chrsci/49.2.94] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
686
|
Zhang X, Zhang Y, Zhou Z, Wei J, Essehli R, Bali BE. Core–shell Ni0.5TiOPO4/C composites as anode materials in Li ion batteries. Electrochim Acta 2011. [DOI: 10.1016/j.electacta.2010.12.033] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
687
|
Xiong W, Liu T, Wang Y, Chen X, Sun L, Guo N, Zheng H, Zheng L, Ruat M, Han W, Zhang C, Zhou Z. Extracellular Ca2+ Directly Inhibits Exocytosis in Neurons. Biophys J 2011. [DOI: 10.1016/j.bpj.2010.12.1232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
|
688
|
Huang H, Wei Z, Huang Y, Zhao D, Zheng L, Cai T, Wu M, Wang W, Ding X, Zhou Z, Du Q, Li Z, Liang Z. An efficient and high-throughput electroporation microchip applicable for siRNA delivery. LAB ON A CHIP 2011; 11:163-172. [PMID: 20957267 DOI: 10.1039/c0lc00195c] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Here we report a novel electroporation microchip with great performance and compatibility with the standard multi-well plate used in biological research. The novel annular interdigitated electrode design makes it possible to achieve efficient cell transfection as high as 90% under low-strength electrical pulses, thereby circumventing the many adverse effects of conventional cuvette-type and previously reported microchip-based electroporation devices. Using this system, we demonstrated substantially improved cell transfection efficacy and viability in cultured and primary cells, for both plasmid and synthetic siRNA. Improvements of this system open new opportunities for high-throughput applications of siRNA technology in basic and biomedical research.
Collapse
|
689
|
He S, Zhou Z, Meng K, Zhao H, Yao B, Ringø E, Yoon I. Effects of dietary antibiotic growth promoter and Saccharomyces cerevisiae fermentation product on production, intestinal bacterial community, and nonspecific immunity of hybrid tilapia (Oreochromis niloticus female × Oreochromis aureus male)1. J Anim Sci 2011; 89:84-92. [DOI: 10.2527/jas.2010-3032] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
|
690
|
Zhou Z, He S. Do stocking densities affect the gut microbiota of gibel carp Carassius auratus gibelio cultured in ponds? ACTA ACUST UNITED AC 2011. [DOI: 10.4172/2155-9546.s1-003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
691
|
Thornhill A, Wheat S, Al-Shenar S, Atalla N, Menabawey M, Summers M, Giles J, Vidal C, Alama P, Bosch E, Zuzuarregui JL, Pellicer A, Nelen WLDM, den Breejen EME, Schol SFE, Kremer JAM, Hermens RPMG, Nagai R, Fukunaga N, Kitasaka H, Yoshimura T, Itoi F, Tamura F, Kitamura K, Hasegawa N, Kato M, Nakayama K, Honma H, Oguri H, Sano M, Hashiba Y, Asada Y, den Breejen EME, Hermens RPMG, Galama WH, Willemsen WN, Nelen WLDM, Kremer JAM, Lashwood A, Solomonides A, Olive M, Harton G, Patch C, Flinter F, Mendoza R, Perez S, de los Santos MJ, Larreategui Z, Exposito A, Aparicio MV, Martinez Indart L, Matorras R, Sato Y, Nakamura Y, Sakamoto E, Tasaka A, Usui K, Hattori H, Ito Y, Nakajo Y, Doshida M, Kyono K, Koike A, Haruki A, Horiuchi R, Sugihara K, Fukuda A, Morimoto Y, Cambiaghi A, Leao R, Castellotti D, Nascimento P, Molina Gonzalez I, Clavero Gilabert A, Gonzalvo Lopez MC, Rosales Martinez A, Martinez Navarro L, Mozas Moreno J, Castilla Alcala JA, Fleischer K, Muller AF, Hohmann FP, de Jong FH, Eijkemans MJC, Fauser BC, Laven JSE, Bonduelle M, Van Landuyt L, Stoop D, Van de Velde H, Verheyen G, Haentjens P, Desmyttere S, Carlos RV, Setti AS, Braga DPAF, Figueira RCS, Iaconelli Jr. A, Borges Jr. E, Bariani F, Vespasiano F, Puoti F, Fehily D, Porta E, Nanni Costa A, Zhang Y, Cui Y, Wang L, Zhao H, Zhao W, Wang J, Gao L, Sha J, Zhou Z, Liu J, Liu W, Li XF, Xi WY, Tan L, Fan LQ, Lu GX, Bungum M, Bungum L, Lynch KF, Wedlund L, Humaidan P, Giwercman A, Godunova V, Kaulins T, Godunovs K, Jonina I, Pozilenkova N, Subnikovs N, Trejs G, Lejins V, Mohova M, Rumjanceva I, Arajs M. POSTER VIEWING SESSION - QUALITY AND SAFETY OF ART THERAPIES. Hum Reprod 2011. [DOI: 10.1093/humrep/26.s1.88] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
692
|
Jones DL, Zhou Z. Canadian Journal of Physiology and Pharmacology. Introduction. Can J Physiol Pharmacol 2010; 88:v-viii. [PMID: 20397312 DOI: 10.1139/y10-910] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
693
|
Wang X, Zhang Y, Zhou Z, Hu C. Neoadjuvant Chemotherapy for Nasopharyngeal Carcinoma with Cisplatin and 5-fluorouracil: Who Might Benefit? Int J Radiat Oncol Biol Phys 2010. [DOI: 10.1016/j.ijrobp.2010.07.1010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
694
|
Hua R, Ou G, Wu S, Li J, Cao J, Zhang H, Chen D, Feng Q, Zhou Z, Zhang X, Wang L. Phase II Study of Cisplatin/Etoposide vs. Weekly Paclitaxol/Carboplatin with Radiotherapy for Patients with Locally Advanced Non-small Cell Lung Cancer. Int J Radiat Oncol Biol Phys 2010. [DOI: 10.1016/j.ijrobp.2010.07.280] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
695
|
Wang Q, Zhang W, Wang L, Zhou Z, Xiao Z. Esophagogram with Barium Assessment of Multimodality Therapy Predicts Survival of Esophageal Squamous Cell Carcinoma Patients. Int J Radiat Oncol Biol Phys 2010. [DOI: 10.1016/j.ijrobp.2010.07.1657] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
696
|
Zhou Z, Daviet JC, Marin B, Macian F, Salle JY, Zhou N, Zhu Y. Vital and functional outcomes of the first-ever hemispheric stroke, epidemiological comparative study between Kunming (China) and Limoges (France). Ann Phys Rehabil Med 2010; 53:547-58. [PMID: 20951108 DOI: 10.1016/j.rehab.2010.09.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2010] [Revised: 09/03/2010] [Accepted: 09/06/2010] [Indexed: 11/29/2022]
Abstract
BACKGROUND Clinical outcomes and socioeconomic consequences after a stroke may differ between regions. METHODS One cohort was established prospectively in Kunming (China) to compare with a cohort of 156 stroke patients included in Limoges (France). During 1 year, patients hospitalized within 48 hours for a first-ever hemispheric stroke were included. Demographic data and neurocardiovascular risk factors were registered. Hemiplegia was evaluated. Functional outcome was assessed using the Barthel Index (BI) after 3 months. RESULTS One hundred and eighteen patients were included in Kunming. Patients of Kunming were younger (61.4 ± 13.4 vs 72.3 ± 14.6 years in Limoges, P<0.0001), more involved in professional activity (36.4% vs 12.8%, P<0.0001). Survival analysis indicated that mortality did not differ between cohorts, but independently predicted by coma at the 2nd day (HR=9.33, 95% CI [4.39, 19.78]) and age>70 years (HR=6.29, 95% CI [2.36, 16.59]). Despite a better baseline BI for patients of Kunming (50.0 ± 34.9 vs 37.4 ± 34.2, P=0.0031), after adjustment for confusing, patients in Limoges had a 2.11 OR 95% CI [1.03, 4.31]) to reach a BI>80 at 3 months. CONCLUSIONS Functional recovery for patients of Kunming was not as good as expected. The socioeconomic consequences of stroke in Kunming are significant as they involved younger subjects who were still in work.
Collapse
|
697
|
Pan J, Hu H, Zhou Z, Sun L, Peng L, Yu L, Sun L, Liu J, Yang Z, Ran Y. Tumor-suppressive mir-663 gene induces mitotic catastrophe growth arrest in human gastric cancer cells. Oncol Rep 2010; 24:105-12. [PMID: 20514450 DOI: 10.3892/or_00000834] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Increasing evidence suggests that microRNAs are involved in human carcinogenesis as tumor suppressors or oncogenes. A growing number of reports has shown that an interest has been sparked in aberrant microRNA expression and how they can be used to treat human diseases, including cancer. However, their precise biological role remains largely unknown. In the present study, we aimed to identify micro-RNA species involved in the regulation of tumor growth. By performing quantitative reverse transcription-polymerase chain reaction (RT-PCR) analysis, we demonstrated that mir-663 was downregulated in human gastric cancer cell lines unlike in normal cells. A transient introduction of mir-663 into the human gastric cancer cell lines BGC823 and SNU5 induced morphology changes and suppression of proliferation of these cells. In addition, mir-663 alters the DNA content and induces phenotypes of mitotic catastrophe in tumor cells. Moreover, the liposome-mediated delivery of mir-663 suppressed the in vivo growth of the BGC823 and SNU5 cells. Western blot analyses performed after the introduction of mir-663 revealed upregulation of cyclin B following transfection with mir-663. Our results provide evidence that downregulation of mir-663 in tumor cells may contribute to aberrant cell hyperplasia, leading to the development of gastric cancer. Therefore, mir-663 might function as a potent suppressor of tumor growth.
Collapse
|
698
|
Ganor Y, Zhou Z, Tudor D, Schmitt A, Vacher-Lavenu MC, Gibault L, Thiounn N, Tomasini J, Wolf JP, Bomsel M. Within 1 h, HIV-1 uses viral synapses to enter efficiently the inner, but not outer, foreskin mucosa and engages Langerhans-T cell conjugates. Mucosal Immunol 2010; 3:506-22. [PMID: 20571487 DOI: 10.1038/mi.2010.32] [Citation(s) in RCA: 116] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Although circumcision reduces male acquisition of human immunodeficiency virus type-1 (HIV-1) by 60%, the initial mechanisms of HIV-1 transmission at the foreskin remain elusive. We have established two novel and complementary models of the human adult foreskin epithelium, namely, ex vivo foreskin explants and in vitro reconstructed immunocompetent foreskins. In these models, efficient HIV-1 transmission occurs after 1 h of polarized exposure of the inner, but not outer, foreskin to mononuclear cells highly infected with HIV-1, but not to cell-free virus. HIV-1-infected cells form viral synapses with apical foreskin keratinocytes, leading to polarized budding of HIV-1, which is rapidly internalized by Langerhans cells (LCs) in the inner foreskin. In turn, LCs migrate toward the epidermis-dermis interface to form conjugates with T cells, thereby transferring HIV-1. Seminal plasma mixed with cervicovaginal secretions inhibits HIV-1 translocation. This set of results rationalizes at the cellular level the apparent protective outcome of circumcision against HIV-1 acquisition by men.
Collapse
|
699
|
Zhou Z, Ross IM, Rainforth WM, Hovsepian PE. Tracing C changes in a C/CrC PVD coating using Raman spectroscopy and EELS. ACTA ACUST UNITED AC 2010. [DOI: 10.1088/1742-6596/241/1/012108] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
700
|
Cheng L, Zhou Z, Flesken-Nikitin A, Toshkov IA, Wang W, Camps J, Ried T, Nikitin AY. Rb inactivation accelerates neoplastic growth and substitutes for recurrent amplification of cIAP1, cIAP2 and Yap1 in sporadic mammary carcinoma associated with p53 deficiency. Oncogene 2010; 29:5700-11. [PMID: 20676140 PMCID: PMC2967730 DOI: 10.1038/onc.2010.300] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Genetically defined mouse models offer an important tool to identify critical secondary genetic alterations with relevance to human cancer pathogenesis. We used newly generated MMTV-Cre105Ayn mice to inactivate p53 and/or Rb strictly in the mammary epithelium, and to determine recurrent genomic changes associated with deficiencies of these genes. p53 inactivation led to formation of estrogen receptor-positive raloxifene-responsive mammary carcinomas with features of luminal subtype B. Rb deficiency was insufficient to initiate carcinogenesis but promoted genomic instability and growth rate of neoplasms associated with p53 inactivation. Genome-wide analysis of mammary carcinomas identified a recurrent amplification at chromosome band 9A1, a locus orthologous to human 11q22, which contains protooncogenes cIAP1 (Birc2), cIAP2 (Birc3) and Yap1. It is interesting that this amplicon was preferentially detected in carcinomas carrying wild-type Rb. However, all three genes were overexpressed in carcinomas with p53 and Rb inactivation, likely due to E2F-mediated transactivation, and cooperated in carcinogenesis according to gene knockdown experiments. These findings establish a model of luminal subtype B mammary carcinoma, identify critical role of cIAP1, cIAP2 and Yap1 co-expression in mammary carcinogenesis and provide an explanation for the lack of recurrent amplifications of cIAP1, cIAP2 and Yap1 in some tumors with frequent Rb deficiency, such as mammary carcinoma.
Collapse
|