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Chen Song S, Zhong S, Xiang Y, Li JH, Guo H, Wang WY, Xiong YL, Li XC, Chen Shi S, Chen XP, Chen G. Complement inhibition enables renal allograft accommodation and long-term engraftment in presensitized nonhuman primates. Am J Transplant 2011; 11:2057-66. [PMID: 21831160 DOI: 10.1111/j.1600-6143.2011.03646.x] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Protection against humoral injury mediated by donor-specific antibodies (DSA), also known as accommodation, may allow for long-term allograft survival in presensitized recipients. In the present study, we determined the role of complement in renal allograft accommodation in donor skin-presensitized nonhuman primates under conventional immunosuppression. Donor skin allografts were transplanted to presensitized recipients 14 days prior to renal transplantation. Renal allografts not receiving any immunosuppressive treatment developed accelerated rejection with predominantly humoral injury, which was not prevented using conventional cyclosporine (CsA) triple therapy. Inhibition of complement activation with the Yunnan-cobra venom factor (Y-CVF) successfully prevented accelerated antibody-mediated rejection and resulted in successful accommodation and long-term renal allograft survival in most presensitized recipients. Accommodation in this model was associated with the prevention of the early antibody responses induced against donor antigens by complement inhibition. Some antiapoptotic proteins and complement regulatory proteins, including Bcl-2, CD59, CD46 and clusterin, were upregulated in the surviving renal allografts. These results suggest that the complement inhibition-based strategy may be valuable alternative in future clinical cross-match positive or ABO-incompatible transplantation.
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352
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Ling ZH, Guo H, Cheng HR, Yu YF. Sources of ambient volatile organic compounds and their contributions to photochemical ozone formation at a site in the Pearl River Delta, southern China. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2011; 159:2310-9. [PMID: 21616570 DOI: 10.1016/j.envpol.2011.05.001] [Citation(s) in RCA: 89] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2011] [Revised: 04/13/2011] [Accepted: 05/01/2011] [Indexed: 05/16/2023]
Abstract
The Positive Matrix Factorization (PMF) receptor model and the Observation Based Model (OBM) were combined to analyze volatile organic compound (VOC) data collected at a suburban site (WQS) in the PRD region. The purposes are to estimate the VOC source apportionment and investigate the contributions of these sources and species of these sources to the O(3) formation in PRD. Ten VOC sources were identified. We further applied the PMF-extracted concentrations of these 10 sources into the OBM and found "solvent usage 1", "diesel vehicular emissions" and "biomass/biofuel burning" contributed most to the O(3) formation at WQS. Among these three sources, higher Relative Incremental Reactivity (RIR)-weighted values of ethene, toluene and m/p-xylene indicated that they were mainly responsible for local O(3) formation in the region. Sensitivity analysis revealed that the sources of "diesel vehicular emissions", "biomass/biofuel burning" and "solvent usage 1" had low uncertainties whereas "gasoline evaporation" showed the highest uncertainty.
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353
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Chi J, Uzui H, Guo H, Ueda T, Lee JD. The role of eplerenone on activity of matrix metalloprotainase-2 stimulated by high glucose and interleukin 1 in human cardiac fibroblasts. BRITISH HEART JOURNAL 2011. [DOI: 10.1136/heartjnl-2011-300867.334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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354
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Chi J, Guo H, Peng F, Yang B, Hiroyasu U. Profibrotic influence of high glucose on human cardiac fibroblast functions. BRITISH HEART JOURNAL 2011. [DOI: 10.1136/heartjnl-2011-300867.333] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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355
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Schwalm J, Lai T, Alharbi A, Karl D, Guo H, Kingsbury K, Tu J, Natarajan M. 145 Syntax scores and real world revascularization patterns. Can J Cardiol 2011. [DOI: 10.1016/j.cjca.2011.07.103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022] Open
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356
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Guo H, Zhang L. PL-005 Bioprospecting for potent anti-tuberculosis compounds from microbial natural product library. Int J Infect Dis 2011. [DOI: 10.1016/s1201-9712(11)60092-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022] Open
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357
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Li LS, Zheng LF, Xu JD, Ji T, Guo H, Li XF, Li Y, Zhang Y, Zhu JX. Entacapone promotes cAMP-dependent colonic Cl(-) secretion in rats. Neurogastroenterol Motil 2011; 23:657-e277. [PMID: 21501335 DOI: 10.1111/j.1365-2982.2011.01715.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
BACKGROUND Entacapone is a promising drug used widely for the treatment of Parkinson's disease (PD) as a catechol-O-methyl transferase (COMT) inhibitor. However, entacapone has gastrointestinal side effects. The aim of this study was to investigate the effects of entacapone on the epithelial ion transport in rat distal colon, and explore the underlying mechanism. METHODS The study was performed on freshly isolated colonic mucosa-only, submucosa-only and mucosa-submucosa preparations in rat. The short circuit current (I(SC) ) was measured to determine electrogenic ion transport, and a scanning ion-selective electrode technique (SIET) was used to directly measure Cl(-) flux across the epithelium. The content of intracellular cAMP was measured with radioimmunoassay (RIA). KEY RESULTS Entacapone increased mucosal I(SC) in the rat distal colon. I(SC) was inhibited significantly by apical addition of diphenylamine-2,2'-dicarboxylic acid (DPC), a blocker of the Cl(-) channel, basolateral application of bumetanide, an inhibitor of Na(+) -K(+) -2Cl(-) co-transporter (NKCC), removal of Cl(-) from the bathing solution, and pretreatment with MDL 12330A, an inhibitor of adenylate cyclase. Inhibiting endogenous prostaglandin (PG) synthesis with indomethacin, and eliminating submucosal enteric neural activity with tetrodotoxin (TTX)-inhibited entacapone-evoked I(SC) increases. Similar results were also obtained when Cl(-) flux was measured with SIET. Entacapone significantly increased intracellular cAMP content, which was greatly inhibited by either indomethacin or TTX in the tissues containing submucosal plexus, and by only indomethacin in the mucosa-only preparations. CONCLUSIONS & INFERENCES Entacapone stimulates cAMP-dependent Cl(-) secretion in the rat colon, and this process is regulated by endogenous PG and the submucosal enteric nervous system.
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358
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Shi Y, Zhou L, Huang LH, Lian YT, Zhang XM, Guo H, Wu TC, Cheng LX, He MA. Plasma ferritin levels, genetic variations in HFE gene, and coronary heart disease in Chinese: a case-control study. Atherosclerosis 2011; 218:386-90. [PMID: 21696736 DOI: 10.1016/j.atherosclerosis.2011.05.040] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/12/2011] [Revised: 05/03/2011] [Accepted: 05/24/2011] [Indexed: 10/18/2022]
Abstract
BACKGROUND The association between body iron stores and coronary heart disease (CHD) was inconsistent. We sought to explore this association in Chinese Han population and further examine the association of the variations in hemochromatosis (HFE) gene and CHD risk. METHODS We conducted a case-control study including 1334 CHD patients and 1334 age- and sex-frequency matched controls. The plasma ferritin levels were measured by enzyme linked immunosorbent assay. Genotypes of the tagging single nucleotide polymorphisms (tagSNPs) were determined by TaqMan SNP allelic discrimination. RESULTS The plasma ferritin levels in CHD cases (197.9μg/L [2.7-932.9μg/L]) were higher than those in controls (179.9μg/L [21.1-878.2μg/L]; P=0.028). The odds ratios (ORs) across the tertiles of plasma ferritin levels were 1.0 (reference), 0.93 (0.76-1.13), and 1.23 (1.02-1.48; P for trend=0.028). Adjustment for the traditional risk factors attenuated the associations to null (P for trend=0.22). Compared with the TT genotype of tagSNP rs9366637, subjects with C allele had higher risk of CHD (OR=1.35 for TC and 1.76 for CC; P=0.001 and <0.001 respectively). After adjustment for the conventional risk factors the results remained unchanged. We did not find significantly different plasma ferritin levels among different genotypes of rs9366637 (P=0.52). CONCLUSIONS The plasma ferritin levels were not significantly associated with CHD risk. However, the SNP rs9366637 in HFE gene was associated with higher CHD risk in Chinese Han population. The underlie mechanism remained to be elucidated in further studies.
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Sun LJ, Hu J, Tan T, Guo H, Gao JW. Identification of a novel allele HLA-DRB1*08:41 in a Chinese donor. ACTA ACUST UNITED AC 2011; 78:294-5. [DOI: 10.1111/j.1399-0039.2011.01698.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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360
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Guo H, Zhao Y, Lu J, Li Z. The clinical significance of tubulin-β, c-erbB-2/HER2, ERCC-1, and TS in the treatment of NSCLC. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.e18042] [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
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361
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Li Z, Lu J, Zhao Y, Guo H. The retrospective analysis of the frequency of EGFR mutations and the efficacy of gefitinib in NSCLC patients with brain metastasis. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.e18065] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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362
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Guo H, Cheng HR, Ling ZH, Louie PKK, Ayoko GA. Which emission sources are responsible for the volatile organic compounds in the atmosphere of Pearl River Delta? JOURNAL OF HAZARDOUS MATERIALS 2011; 188:116-124. [PMID: 21316844 DOI: 10.1016/j.jhazmat.2011.01.081] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2010] [Revised: 01/17/2011] [Accepted: 01/18/2011] [Indexed: 05/30/2023]
Abstract
A field measurement study of volatile organic compounds (VOCs) was simultaneously carried out in October-December 2007 at an inland Pearl River Delta (PRD) site and a Hong Kong urban site. A receptor model i.e. positive matrix factorization (PMF) was applied to the data for the apportionment of pollution sources in the region. Five and six sources were identified in Hong Kong and the inland PRD region, respectively. The major sources identified in the region were vehicular emissions, solvent use and biomass burning, whereas extra sources found in inland PRD included liquefied petroleum gas and gasoline evaporation. In Hong Kong, the vehicular emissions made the most significant contribution to ambient VOCs (48 ± 4%), followed by solvent use (43 ± 2%) and biomass burning (9 ± 2%). In inland PRD, the largest contributor to ambient VOCs was solvent use (46 ± 1%), and vehicular emissions contributed 26 ± 1% to ambient VOCs. The percentage contribution of vehicular emission in Hong Kong in 2007 is close to that obtained in 2001-2003, whereas in inland PRD the contribution of solvent use to ambient VOCs in 2007 was at the upper range of the results obtained in previous studies and twice the 2006 PRD emission inventory. The findings advance our knowledge of ozone precursors in the PRD region.
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363
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He GX, van den Hof S, van der Werf MJ, Guo H, Hu YL, Fan JH, Zhang WM, Tostado CP, Borgdorff MW. Inappropriate Tuberculosis Treatment Regimens in Chinese Tuberculosis Hospitals. Clin Infect Dis 2011; 52:e153-6. [DOI: 10.1093/cid/cir075] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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364
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Guo H, Zhang J, Inal C, Nguyen T, Fruehauf JH, Keates AC, Li CJ. Erratum: Targeting tumor gene by shRNA-expressing Salmonella-mediated RNAi. Gene Ther 2011. [DOI: 10.1038/gt.2011.9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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365
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Singer SW, Reddy AP, Gladden JM, Guo H, Hazen TC, Simmons BA, VanderGheynst JS. Enrichment, isolation and characterization of fungi tolerant to 1-ethyl-3-methylimidazolium acetate. J Appl Microbiol 2011; 110:1023-31. [PMID: 21276149 DOI: 10.1111/j.1365-2672.2011.04959.x] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
AIMS This work aimed to characterize microbial tolerance to 1-ethyl-3-methylimidazolium acetate ([C2mim][OAc]), an ionic liquid that has emerged as a novel biomass pretreatment for lignocellulosic biomass. METHODS AND RESULTS Enrichment experiments performed using inocula treated with [C2mim][OAc] under solid and liquid cultivation yielded fungal populations dominated by Aspergilli. Ionic liquid-tolerant Aspergillus isolates from these enrichments were capable of growing in a radial plate growth assay in the presence of 10% [C2mim][OAc]. When a [C2mim][OAc]-tolerant Aspergillus fumigatus strain was grown in the presence of switchgrass, endoglucanases and xylanases were secreted that retained residual enzymatic activity in the presence of 20% [C2mim][OAc]. CONCLUSIONS The results of the study suggest that tolerance to ionic liquids is a general property of the Aspergilli. SIGNIFICANCE AND IMPACT OF THE STUDY Tolerance to an industrially important ionic liquid was discovered in a fungal genera that is widely used in biotechnology, including biomass deconstruction.
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366
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Kim V, Mi Z, Bhattacharya S, Guo H, Jones L, Kuo P. Osteopontin Promotes CCL5 Expression and In Vitro Metastatic Behavior in Mesenchymal Stem Cells via Integrin and AP-1 c-Jun Homodimer. J Surg Res 2011. [DOI: 10.1016/j.jss.2010.11.554] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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367
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Talbot L, Bhattacharya S, Kim V, Guo H, Mi Z, Kuo P. Pharmacokinetic Characterization Of An RNA Aptamer Against Osteopontin (OPN) And Demonstration Of In Vivo Efficacy In Reversing Growth of Human Breast Cancer Cells. J Surg Res 2011. [DOI: 10.1016/j.jss.2010.11.558] [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]
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368
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Guo H, Hu JY. Optimization study of a hybrid alum coagulation-membrane filtration system for virus removal. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2011; 64:1843-1850. [PMID: 22020477 DOI: 10.2166/wst.2011.147] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Due to the intrinsically small sizes of enteric viruses (20-100 nm) and their relatively high resistance to most disinfectants, detection of viruses in treated drinking water is not a rare phenomenon. This study therefore evaluates various aspects involved in a hybrid alum coagulation-ultrafiltration (UF) system for virus removal. Coagulant doses (0, 1 and 10 mg Al(3+)/L) and pH conditions relevant to drinking water (pH 6-8) were investigated. With this hybrid system, removal was not attributable merely to MS2 adsorption to flocs and subsequent retention by UF membranes. MS2 removal comprises of inactivation by the effect of pH and coagulant and subsequently, rejection of virus-associated flocs by UF membrane. Coagulation with 1 mg Al(3+)/L at pH 6 and 7 resulted in an overall reduction brought about by an average of 0.62 log inactivation via the pH effect, 1.2 log inactivation by alum coagulant, and >5.4 log rejection by the 100 kDa polyethersulfone UF membrane. In contrast, negligible upstream inactivation was noted with a coagulant dose of 1 mg Al(3+)/L at pH 8, but 5.8 log rejection was attained with downstream UF filtration. By optimizing the conditions appropriate for upstream inactivation and subsequent membrane rejection, virus removal efficiencies can be enhanced.
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Jiang F, Guo H, Wang TJ, Cheng HR, Wang XM, Simpson IJ, Ding AJ, Saunders SM, Lam SHM, Blake DR. An ozone episode in the Pearl River Delta: Field observation and model simulation. ACTA ACUST UNITED AC 2010. [DOI: 10.1029/2009jd013583] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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370
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Xing Y, Guo H, Shi Y. e0176 The effects of rosuvastatin on the expression of homocysteine-induced expression of matrix metalloproteinase-2 (MMP-2) and cell migration in rat vascular smooth muscle cells. Heart 2010. [DOI: 10.1136/hrt.2010.208967.176] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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371
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Guo H, Zhang J, Inal C, Nguyen T, Fruehauf JH, Keates AC, Li CJ. Erratum: Targeting tumor gene by shRNA-expressing Salmonella-mediated RNAi. Gene Ther 2010. [DOI: 10.1038/gt.2010.154] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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372
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Zhang XH, Ji T, Guo H, Liu SM, Li Y, Zheng LF, Zhang Y, Zhang XF, Duan DP, Zhu JX. Expression and activation of β-adrenoceptors in the colorectal mucosa of rat and human. Neurogastroenterol Motil 2010; 22:e325-34. [PMID: 20879995 DOI: 10.1111/j.1365-2982.2010.01598.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
BACKGROUND The functions of the distal colon are regulated by local and extrinsic neural pathways. In previous studies, we have found that dopamine (DA) and norepinephrine (NE) could evoke colonic ion transport by activating β-adrenoceptors. The present study aims to investigate the segmental differences in expression and activation of β-adrenoceptors in the distal colon in physiological and pathophysiological conditions. METHODS Real-time PCR, immunofluorescence, and Western blotting were used to detect the expression of β-adrenoceptors in the rat and human distal colon. Short-circuit current measurements (Isc) were used to assess the role of β-adrenoceptors in ion transport. KEY RESULTS DA and NE caused greater suppression of baseline Isc in distal colon adjacent to the rectum than in segments further away from the anus. These responses were inhibited by selective antagonists of β₁- and β₂-adrenoceptors, but not β₃-adrenoceptor. The expression levels of β₁- and β₂-adrenoceptors in colonic mucosa were higher in colorectum than the regions away from the anus of rats and humans. In wrap-restraint stress (2 h), DA-, NE-induced ΔIsc and the expression of β-adrenoceptors in the colorectum were significantly reduced. However, when endogenous catecholamines were depleted by 6-hydroxydopamine (75 mg kg(-1), i.p., 3 days), DA-, NE-induced ΔIsc as well as the expression of β-adrenoceptors were significantly enhanced in the rat colorectum but not in more proximal regions of the distal colon. CONCLUSIONS & INFERENCES β₁- and β₂-adrenoceptors are predominantly expressed in the colorectal mucosa. Perturbation of endogenous catecholamine levels influences the expression and activation of β-adrenoceptors in the colorectal region.
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Xing Y, Guo H, Yang F. e0585 The relationship between responses of blood pressure to exercise stress and changes of endothelium dependent vasodilatation in rest blood pressure well-controlled patients with hypertension. BRITISH HEART JOURNAL 2010. [DOI: 10.1136/hrt.2010.208967.585] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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374
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Liu L, Guo H, Lv H, Xin Y, Qiu Y, Pen F, Yang B. e0363 Left anterior descending artery dissection and acute myocardial infarction after blunt chest trauma: Two case report. BRITISH HEART JOURNAL 2010. [DOI: 10.1136/hrt.2010.208967.363] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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375
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Xing Y, Guo H, Yang B. e0550 Radiofrequency catheter ablation of left concealed atrioventricular accessory pathway with rapid rate dependent ventriculoatrial conduction. BRITISH HEART JOURNAL 2010. [DOI: 10.1136/hrt.2010.208967.550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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