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Zhang F, Chen M, Yang B, Chen H, Ju W, Hou X, Cao K, Tao H, Zhang J, Li L, Jia YH, Chu JM, Ding LG, Zhao YJ, Wei W, Wang J, Zhang S, Suenaga H, Saito S, Zheng L, Yao Y, Zhang S, Zhang K, Chen W, Li J, Wang F, Chen X. VT Ablation II. Europace 2011. [DOI: 10.1093/europace/euq468] [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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327
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Qiu H, Hsu CC, Fishman EK, Tuli R, Wolfgang CL, Edil BH, Hruban RH, Zheng L, Laheru D, Herman JM. Correlation between pancreatic tumor size as measured on 3D CT scan versus pathologic specimen: Impact on radiation treatment volume. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.4_suppl.276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
276 Background: Definition of the target volume for irradiation of pancreatic cancer (PCA) must balance coverage of micrometastatic disease with toxicity. To determine differences between radiographically defined tumors and true pathologic tumor specimens, we correlated the maximum tumor diameter (TD) of preoperatively imaged tumors with resected tumor specimens. Methods: With IRB approval, a retrospective chart review of patients who underwent resection of PCA between 2006 and 2010 was conducted. 73 patients were identified with preoperative CT imaging and pathologic analysis of tumors. 70 of 73 patients had a preoperative 3D CT performed. The TD as measured by a radiologist (EF) on contrast CT and 3D CT reconstruction was compared with that measured by pathological analysis of the resected specimen. Results: 70 patients underwent resection with preoperative CT imaging; 14.1% of these patients had CT performed >6 weeks prior to surgery. The mean (SD) pathologic maximum TD was 31.3 mm (11.3) with range 3 mm to 60 mm. Whereas TD was underestimated by 1.9 mm (1.7 SE) with CT relative to pathologic analysis, this difference was not statistically significant (paired t-test, p=0.27) with a correlation coefficient of 0.265. 3D CT imaging had a smaller mean difference with a mean 3D CT diameter 0.4 mm (1.76 SE) larger than the pathologic specimen (p=0.82) with correlation coefficient 0.222. However, the max TD on 3D CT imaging was on average 2.3 mm larger than on CT (p=0.016) with correlation coefficient 0.798. Of patients with R0 resections (N=48), CT underestimated path size by 3.1 mm (p=0.020), whereas 3D CT was slightly larger (0.1 mm, p=0.949). For R1 resections (n=22), both CT and 3D CT overestimated size (0.8 mm and 1.1 mm, respectively, p>0.5). Conclusions: PCA TD is generally underestimated on CT imaging, yet better approximated with 3D CT. Improved correlation was seen between CT and pathologic specimens following R0 resection. Alternatively, R1 resection specimens were slightly overestimated by CT/3D CT imaging. As a result, clinical target volumes should be expanded accordingly during radiotherapy planning to properly account for these discrepancies in the gross tumor. No significant financial relationships to disclose.
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Diaz LA, Azad NS, Laheru D, Le DT, Devoe CE, Cosgrove D, Zheng L, Arlen PM, Bristol JA. NPC-1C: A novel, therapeutic antibody to treat pancreas and colorectal cancers. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.4_suppl.235] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
235 Background: NPC-1C (ensituximab) is a chimeric monoclonal antibody being developed as a novel biologic treatment for pancreatic and colorectal cancers. This antibody was selected from a panel of hybridomas generated from mice immunized with semi-purified membrane-associated proteins derived from biologically screened, pooled human allogeneic colon cancer tissues. The NPC-1C epitope appears to be expressed specifically by human colon and pancreatic tumor tissues and cell lines. Methods: Antitumor activity was established in vitro by measuring ADCC with a standard 4-hour 111-Indium release assay on pancreatic and colorectal cancer cell lines. In vivo antitumor efficacy of NPC-1C was tested using pre-established subcutaneous human pancreatic tumor xenograft models. Results: In vitro, the NPC-1C antibody exhibits ADCC activity specifically against human colon and pancreatic tumor cells, but not against control tumor cell lines. The in vivo data showed significant, and reproducible, antitumor action, including some complete tumor regressions. The clinical application for this antibody was bolstered by several examples of human tumor tissues stained with biotin-conjugated NPC-1C that showed a strong correlation of NPC-1C staining against pancreatic and colon tumors. Approximately 45% of tumors stained strongly positive. The staining pattern was typical of elaborated mucin expression, but also showed cytoplasmic and cell membrane staining. Conclusions: A phase I open label, multicenter dose escalation clinical trial with NPC-1C is currently accruing patients with advanced pancreatic and colorectal cancer who are refractory to standard therapy. The primary objectives of the phase I clinical trial are to determine the safety and tolerability of escalating doses of NPC-1C monoclonal antibody therapy and to assess pharmacokinetics and select immune responses to the antibody at each dose level. Secondary objectives are to evaluate evidence of clinical benefit and to explore the immunologic correlates associated with administration of NPC-1C. Results from this trial will determine the minimum standard dosage levels to be used in further trials. [Table: see text]
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Riehl TE, He L, Zheng L, Greco S, Tollefsen DM, Stenson WF. COX-1(+/-)COX-2(-/-) genotype in mice is associated with shortened time to carotid artery occlusion through increased PAI-1. J Thromb Haemost 2011; 9:350-60. [PMID: 21138526 PMCID: PMC3687774 DOI: 10.1111/j.1538-7836.2010.04156.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
BACKGROUND We found a high incidence of thrombotic deaths in COX-1(+/-)COX-2(-/-) mice and sought to define the mechanism of these events. The cyclooxygenase products thromboxane A(2) and prostacyclin are important in the regulation of coagulation but their role in fibrinolysis is largely unexplored. PAI-1 blocks fibrinolysis by inhibiting plasminogen activator. AIM Our objective was to explain the mechanism of increased thrombosis associated with the COX-1(+/-)COX-2(-/-) genotype. METHODS Carotid artery occlusion times were measured after photochemical injury. PAI-1 levels were measured in the plasma by ELISA. PAI-1 levels in the aorta were measured by RT-PCR and Western blotting. Urinary metabolites of Thromboxane A(2) and prostacyclin were measured by ELISA. RESULTS The COX-1(+/-)COX-2(-/-) genotype is associated with a decreased time to occlusion in the carotid artery thrombosis model (30 ± 5 minutes vs 60 ± minutes in wild type, p<.001). The COX-1(-/-)COX-2(+/+), COX-1(+/-)COX-2(+/-) and COX-1(+/-)COX-2(+/+) all had occlusion times similar to wild type. COX-1(+/+)COX-2(-/-) had a prolonged occlusion time. COX-1(+/-)COX-2(-/-) had increased PAI-1 levels in the plasma and aorta and with a prolonged euglobulin lysis time (37.4 ± 10.2 hours vs 15.6 ± 9.8 hours in wild type, p<.004). The decreased time to occlusion in the COX-1(+/-)COX2(-/-) mice was normalized by an inhibitory antibody to PAI-1 whereas the antibody had no effect on the time to occlusion in wild type mice. CONCLUSION The COX-1(+/-)COX-2(-/-) genotype is associated with a shortened time to occlusion in the carotid thrombosis model and the shortened time to occlusion is mediated through increased PAI-1 levels resulting in decreased fibrinolysis.
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Lin M, Wang Q, Zheng L, Huang Y, Lin F, Lin CP, Yang LY. Prevalence and molecular characterization of abnormal hemoglobin in eastern Guangdong of southern China. Clin Genet 2011; 81:165-71. [PMID: 21231928 DOI: 10.1111/j.1399-0004.2011.01627.x] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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331
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Wei W, Luo X, Zheng L, Yu M, Jiang N, Xu XY, Yang ZR. Isolation of a Wild Morchella spp. Strain and the Effects of its Extract on Ethanol-Induced Gastric Mucosal Lesions in Rats. Z NATURFORSCH C 2011. [DOI: 10.5560/znc.2011.66c0055] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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332
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Li Y, Luo JY, Cui HF, Zheng L, Du SS. Study on anti-metastasis of heparin derivatives as ligand antagonist of p-selectin. Biomed Pharmacother 2010; 64:654-8. [DOI: 10.1016/j.biopha.2010.06.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2010] [Accepted: 06/19/2010] [Indexed: 01/03/2023] Open
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333
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Leung G, Sun W, Zheng L, Brookes S, Tully M, Shi R. Anti-acrolein treatment improves behavioral outcome and alleviates myelin damage in experimental autoimmune encephalomyelitis mouse. Neuroscience 2010; 173:150-5. [PMID: 21081153 DOI: 10.1016/j.neuroscience.2010.11.018] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2010] [Revised: 10/20/2010] [Accepted: 11/10/2010] [Indexed: 10/18/2022]
Abstract
Oxidative stress is considered a major contributor in the pathology of multiple sclerosis (MS). Acrolein, a highly reactive aldehyde byproduct of lipid peroxidation, is thought to perpetuate oxidative stress. In this study, we aimed to determine the role of acrolein in an animal model of MS, experimental autoimmune encephalomyelitis (EAE) mice. We have demonstrated a significant elevation of acrolein protein adduct levels in EAE mouse spinal cord. Hydralazine, a known acrolein scavenger, significantly improved behavioral outcomes and lessened myelin damage in spinal cord. We postulate that acrolein is an important pathological factor and likely a novel therapeutic target in MS.
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334
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Simmer JP, Papagerakis P, Smith CE, Fisher DC, Rountrey AN, Zheng L, Hu JCC. Regulation of dental enamel shape and hardness. J Dent Res 2010; 89:1024-38. [PMID: 20675598 DOI: 10.1177/0022034510375829] [Citation(s) in RCA: 157] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Epithelial-mesenchymal interactions guide tooth development through its early stages and establish the morphology of the dentin surface upon which enamel will be deposited. Starting with the onset of amelogenesis beneath the future cusp tips, the shape of the enamel layer covering the crown is determined by five growth parameters: the (1) appositional growth rate, (2) duration of appositional growth (at the cusp tip), (3) ameloblast extension rate, (4) duration of ameloblast extension, and (5) spreading rate of appositional termination. Appositional growth occurs at a mineralization front along the ameloblast distal membrane in which amorphous calcium phosphate (ACP) ribbons form and lengthen. The ACP ribbons convert into hydroxyapatite crystallites as the ribbons elongate. Appositional growth involves a secretory cycle that is reflected in a series of incremental lines. A potentially important function of enamel proteins is to ensure alignment of successive mineral increments on the tips of enamel ribbons deposited in the previous cycle, causing the crystallites to lengthen with each cycle. Enamel hardens in a maturation process that involves mineral deposition onto the sides of existing crystallites until they interlock with adjacent crystallites. Neutralization of acidity generated by hydroxyapatite formation is a key part of the mechanism. Here we review the growth parameters that determine the shape of the enamel crown as well as the mechanisms of enamel appositional growth and maturation.
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335
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Zheng L, Fan HS, Sun J, Chen XN, Wang G, Zhang L, Fan YJ, Zhang XD. Chondrogenic differentiation of mesenchymal stem cells induced by collagen-based hydrogel: an in vivo study. J Biomed Mater Res A 2010; 93:783-92. [PMID: 19653302 DOI: 10.1002/jbm.a.32588] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Chondrogenic differentiation of mesenchymal stem cells (MSCs) relies on inductive media of chondrogenic environment. With proper design, a cellular microenvironment mimicking chondrogenic environment might be created to induce chondrogenesis of MSCs. In this study, bone marrow mesenchymal cells (BMSCs) were encapsulated in collagen-based hydrogel, and then enclosed in diffusion-chambers which allow the body fluid to permeate and preclude the host cells to invade. Then, the chamber with the hydrogel-BMSCs composite was implanted in the back of rabbits subcutaneously. The specimens in the chamber were harvested for histological, immunohistochemical, and RT-PCR analyses after 8 weeks. The results showed that cells with the characteristic of chondrocytes were homogenously distributed and the extracellular matrix (ECM) of cartilage has been secreted, indicating the chondrogenic differentiation of BMSCs. As control, nothing was obtained with only BMSCs. Moreover, the expression of collagen type II, indicator of cartilage ECM, was less in tissues with collagen-alginate-hydrogel (CAH) than that with collagen-hydrogel (CH). The results showed that both CH and CAH may induce the chondrogenesis and the induction is materials dependent. From in vitro experiments, TGF-beta is a necessary signal molecule for chondrogenesis, and it was suggested that the material may take in vivo growth factors to trigger chondrogenesis. From the studies, the chondrogenic induction of the hydrogel may be ascribed to that the hydrogel may provide a suitable environment and aggregate the signal molecule for chondrogenesis in vivo. The results would lend valuable reference in clinical for selection of appropriate scaffold for cartilage repair.
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336
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Sun Z, Zheng L, Detrano R, Zhang X, Xu C, Li J, Hu D, Sun Y. Risk of progression to hypertension in a rural Chinese women population with prehypertension and normal blood pressure. Am J Hypertens 2010; 23:627-32. [PMID: 20300074 DOI: 10.1038/ajh.2010.41] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND To determine the incidence of hypertension and its risk factors among rural Chinese women with prehypertension and normotension. METHODS A population-based sample of 12,060 rural Chinese women aged > or = 35 years and free from hypertension at baseline were followed from 2004-2006 to 2008. Incident hypertension was defined as systolic blood pressure (SBP) > or = 140 mm Hg, diastolic blood pressure (DBP) > or = 90 mm Hg, or current use of antihypertensive medication. RESULTS Over a median follow-up of 28 months (range, 14-47 months), 23.4% of women developed hypertension. The age-adjusted incidence rate was higher in prehypertension than in normotension (11.2/100 person-years vs. 7.9/100 person-years, P < 0.05). Among women with prehypertension, independent predictors of incident hypertension were baseline age, Mongolian ethnicity, low physical activity, baseline body mass index (BMI), baseline salt intake and family history of hypertension. Among women with normal blood pressure (BP), independent predictors were baseline age, low physical activity, baseline BMI and baseline salt intake. The awareness, treatment, and control rates for newly developed hypertension were 33.2, 23.0, and 2.1%, respectively. CONCLUSIONS These data indicate that the incidence of hypertension is high among rural Chinese women and it is associated with many risk factors, and the data also suggest that most newly developed hypertension cases are not treated. This high incidence of hypertension may be related to rapid social changes in our country and may apply to other areas of the developing world. These results call for urgent improvements in hypertension prevention, detection and treatment.
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337
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Yu Z, Ji P, Cao J, Zhu S, Li Y, Zheng L, Chen X, Feng L. Dazl Promotes Germ Cell Differentiation from Embryonic Stem Cells. J Mol Cell Biol 2010. [DOI: 10.1093/jmcb/mjq010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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338
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De Jesus-Acosta A, Oliver GR, Flores E, Wilfong LS, Laheru D, Le DT, Zheng L, Donehower RC, Cosgrove D, Diaz LA. A multicenter review of gemcitabine, docetaxel, and capecitabine (GTX) in patients with advanced pancreatic adenocarcinoma. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.e14580] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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339
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Xu G, Liu X, Zheng L, Fang X, Yin Q. Successful Recanalization of a Chronic In-stent Occlusion at the Vertebral Artery Ostium. A Case Report. Interv Neuroradiol 2010; 15:462-5. [PMID: 20465887 DOI: 10.1177/159101990901500416] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2009] [Accepted: 10/11/2009] [Indexed: 11/16/2022] Open
Abstract
SUMMARY In-stent restenosis or occlusion has been frequently reported as a complication after angioplasty and stenting in vertebral arteries. Reopening chronic in-stent occlusion in cervical arteries with endovascular techniques has not been reported. Here we describe a case with stent implantation in the origin of right vertebral artery. The stent was occluded one year after the procedure. The patient demonstrated concurrent ischemic symptoms which were relieved after the in-stent occlusion being recanalized successfully with re-angioplasty.
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340
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Zheng L, Qing YP, Xu N, Yu Q, Wang Y, Wang FP, Li ZY. Pharmacokinetics and safety of bromotetrandrine (BrTet, W198) after single-dose intravenous administration in healthy Chinese volunteers. J Clin Pharm Ther 2010; 35:113-9. [DOI: 10.1111/j.1365-2710.2009.01075.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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341
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Zheng L, Xu J, Qiu W, Liu X, Zhao CM, Chen D, Chen Y. Cardioprotection of exogenous erythropoietin in mice with ligature-induced aortic stenosis: effects on maladaptive cardiac hypertrophy. JOURNAL OF PHYSIOLOGY AND PHARMACOLOGY : AN OFFICIAL JOURNAL OF THE POLISH PHYSIOLOGICAL SOCIETY 2010; 61:13-20. [PMID: 20228410] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Received: 08/17/2009] [Accepted: 01/12/2010] [Indexed: 05/28/2023]
Abstract
Pre-operative treatment with recombinant human erythropoietin may improve aortic stenosis patients' condition, including anemia and/or cardiac dysfunction, for subjecting to aortic valve replacement. In this study, we tested this hypothesis in a mouse model of aortic stenosis. Adult male mice were subjected to either aortic stenosis created by aortic ligature or sham operation. Aortic stenosis for 4 weeks caused cardiac hypertrophy, pulmonary congestion and left ventricular dysfunction. It was associated with increased levels of tumor necrosis factor-alpha in serum and myocardium, and reduced levels of interleukin-10 in myocardium but not in serum. Myocyte apoptosis rate, level of cleaved caspase 3, activity of nuclear factor-kappaB and expression of p38-MAPK pathway were also elevated. Erythropoietin treatment increased hematocrit but did not prevent the development of cardiac hypertrophy. It, however, reduced the apoptosis, prevented the increases in tumor necrosis factor-alpha, nuclear factor-kappaB activation and phosphorylation of p38, and attenuated the increases in lung weight, the decreases in LVEF and LVFS, and the increases in LVDd and LVDs. In conclusion recombinant human erythropoietin has cardioprotective effects in maladaptive cardiac hypertrophy by inhibiting nuclear factor-kappaB activation, phosphorylation of p38-MAPK pathway, and production of tumor necrosis factor-alpha, together leading to a reduced apoptosis.
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342
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Apps JA, Zheng L, Zhang Y, Xu T, Birkholzer JT. Evaluation of Potential Changes in Groundwater Quality in Response to CO2 Leakage from Deep Geologic Storage. Transp Porous Media 2010. [DOI: 10.1007/s11242-009-9509-8] [Citation(s) in RCA: 113] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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343
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Huynh H, Ngo VC, Choo SP, Poon D, Koong HN, Thng CH, Toh HC, Zheng L, Ong LC, Jin Y, Song IC, Chang APC, Ong HS, Chung AYF, Chow PKH, Soo KC. Sunitinib (SUTENT, SU11248) suppresses tumor growth and induces apoptosis in xenograft models of human hepatocellular carcinoma. Curr Cancer Drug Targets 2009; 9:738-47. [PMID: 19754358 DOI: 10.2174/156800909789271530] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Hepatocellular carcinoma (HCC) is the fifth most common and third deadliest primary neoplasm. Since HCC is a particularly vascular solid tumor, we determined the antitumor and antiangiogenic activities of sunitinib malate, a potent inhibitor of two receptors involved in angiogenesis - vascular endothelial growth factor receptor (VEGFR) and platelet-derived growth factor receptor (PDGFR). In the present study, we reported that treatment of HepG2 and SK-Hep-1 cells with sunitinib led to growth inhibition and apoptosis in a dose-dependent fashion. Sunitinib inhibited phosphorylation of VEGFR-2 at Tyr951 and PDGFR-beta at Tyr1021 both in vitro and in vivo. Sunitinib also suppressed tumor growth of five patient-derived xenografts. Sunitinib-induced tumor growth inhibition was associated with increased apoptosis, reduced microvessel density and inhibition of cell proliferation. This study provides a strong rationale for further clinical investigation of sunitinib in patients with hepatocellular carcinoma.
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Lieleg O, Schmoller K, Purdy Drew K, Claessens M, Semmrich C, Zheng L, Bartles J, Bausch A. Structural and viscoelastic properties of actin networks formed by espin or pathologically relevant espin mutants. Chemphyschem 2009; 10:2813-7. [PMID: 19780097 PMCID: PMC2846304 DOI: 10.1002/cphc.200900604] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2009] [Indexed: 11/07/2022]
Abstract
The structural organization of the cytoskeleton determines its viscoelastic response which is crucial for the correct functionality of living cells. Both the mechanical response and microstructure of the cytoskeleton are regulated on a microscopic level by the local activation of different actin binding and/or bundling proteins (ABPs). Misregulations in the expression of these ABPs or mutations in their sequence can entail severe cellular dysfunctions and diseases. Here, we study the structural and viscoelastic properties of reconstituted actin networks cross-linked by the ABP espin and compare the obtained network properties to those of other bundled actin networks. Moreover, we quantify the impact of pathologically relevant espin mutations on the viscoelastic properties of these cytoskeletal networks.
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345
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Tu X, Zhao L, Deng L, Wang W, Zhao L, Liang H, Zheng L, Deng C. UP-2.064: The Diagnosis and Surgical Treatment for Obstructive Azoospermia: Report of 56 Cases. Urology 2009. [DOI: 10.1016/j.urology.2009.07.283] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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346
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Sahai-Srivastava S, Zheng L. PO09-MO-02 Undiagnosed depression and its correlates in a predominantly immigrant Hispanic outpatient neurology clinic in the United States. J Neurol Sci 2009. [DOI: 10.1016/s0022-510x(09)70738-5] [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]
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347
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Zheng L, Alstad J, Bjørnstad T, Polakova D, Stavsetra L, Omtvedt JP. Extraction of Nb and Ta, homolgues of Db, from sulphuric acid solutions with TOA in toluene using SISAK. RADIOCHIM ACTA 2009. [DOI: 10.1524/ract.2008.1463] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Extractions of niobium and tantalum as homologues of dubnium (element 105) into tri-octylamine (TOA) in toluene from H2SO4and H2SO4/K2SO4solutions were performed to explore the possibilities of applying the automated on-line liquid–liquid extraction system SISAK to study chemical properties of dubnium in solutions. The results show that the extraction systems TOA/H2SO4and TOA/H2SO4+K2SO4are promising with respect to performing a study of Db with the SISAK system. Suggestions for performing a SISAK Db-experiment are presented. In batch experiments, Pa has also been investigated.
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Yu Z, Zheng L, Zhang Y, Li J, Ma B. Functional and radiological evaluations of high-energy tibial plateau fractures treated with double-buttress plate fixation. Eur J Med Res 2009; 14:200-5. [PMID: 19541576 PMCID: PMC3351978 DOI: 10.1186/2047-783x-14-5-200] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
OBJECTIVE This study was designed to evaluate the functional and radiological outcomes of patients with complex tibial plateau fractures treated with double-buttress plate fixation. METHODS Sixty five cases of complex (Schatzker type V and VI) tibial plateau fractures were treated with double-buttress plate fixation in our centre from September 2001 to September 2006 through two separate plate incisions. Fifty four patients were followed up for a period ranging from 12 to 48 months and evaluated for the functional and radiological outcomes by a series of standard questionnaire and measurement. RESULTS Due to the good exposure without any extensive soft-tissue dissection of the double-buttress plate fixation, the fractures in all 54 patients were healed and the treatment achieved greater than 90% of satisfactory-to-excellent rates of reduction. The mean time of bone union was 15.4 weeks (range, 12-30 weeks), and the mean time of full weight-bearing was 18.7 weeks (range, 14-26 weeks). At the final follow-up visit, no patients showed knee instability; the mean range of motion was 107.6 degrees (range, 85 degrees -130 degrees ). For all patients, no statistically significant difference in the functional outcomes was observed between their 6-months and final follow-up visits; or in the radiological findings between their immediate postoperative and final follow-up examinations. CONCLUSION Double-buttress plate fixation is a feasible treatment option for bilcondylar and complex tibial plateau fractures. Although technically demanding, it offers reliable stability without additional postoperative adjuvant external fixation, and at the same time avoids extensive soft tissue dissection, allowing the early painless range of motion.
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Zhang Z, Wang J, Zheng L, Qiu L, Zhu X, Zhang X, Sun Z. Preliminary Analysis of the Effectiveness of Traditional Chinese Medicine on Cerebral Ischemia using Diffusion-Weighted MRI. Neuroimage 2009. [DOI: 10.1016/s1053-8119(09)71075-4] [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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350
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Wang L, Zheng L, Wang SY, Zhu TF, Zhu HG. Clonal analysis of gastric carcinoma and precancerous lesions and its relation to Ki-67 protein expression. Neoplasma 2009; 56:48-55. [PMID: 19152245 DOI: 10.4149/neo_2009_01_48] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The pathogenesis of intestinal carcinoma is characterized as progressing through multiple steps, which begin with atrophic gastritis followed by intestinal metaplasia, dysplasia and carcinoma. However, the clonal status of gastric precancerous lesions and its association with proliferative kinetics have not been fully understood. In this study, gastric lesions and normal epithelial cells were isolated from formalin-fixed paraffin embedded tissues using a laser capture microdissection (LCM) system, the clonality was analyzed with human androgen receptor gene (HUMARA) polymerase chain reaction (PCR), and the PCR products were examined using Applied Biosystems 3730 DNA Analyzer. The relationship between the clonal status and Ki-67 protein expression was also investigated. Ki-67 was detected by two-step immunohistochemical staining. 5/32 intestinal metaplasia lesions, 10/45 low grade intraepithelial neoplasia, 25/36 high grade intraepithelial neoplasia and 20/20 intestinal gastric carcinoma were of monoclonal origin. Similar to monoclonal inactivation, the expression rate of Ki-67 also increased along the multi-step gastric carcinogenesis. Clonal status was associated with the expression rate of Ki-67 to a certain extent, which may be useful in assessing susceptibility to gastric carcinoma. Key words: gastric carcinoma; precancerous lesion; clonal analysis; Ki-67.
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