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Chuangchaiya S, Jangpatarapongsa K, Chootong P, Sirichaisinthop J, Sattabongkot J, Pattanapanyasat K, Chotivanich K, Troye-Blomberg M, Cui L, Udomsangpetch R. Immune response to Plasmodium vivax has a potential to reduce malaria severity. Clin Exp Immunol 2009; 160:233-9. [PMID: 20030672 DOI: 10.1111/j.1365-2249.2009.04075.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Plasmodium falciparum infection causes transient immunosuppression during the parasitaemic stage. However, the immune response during simultaneous infections with both P. vivax and P. falciparum has been investigated rarely. In particular, it is not clear whether the host's immune response to malaria will be different when infected with a single or mixed malaria species. Phenotypes of T cells from mixed P. vivax-P. falciparum (PV-PF) infection were characterized by flow cytometry, and anti-malarial antibodies in the plasma were determined by an enzyme-linked immunosorbent assay. We found the percentage of CD3+delta2+-T cell receptor (TCR) T cells in the acute-mixed PV-PF infection and single P. vivax infection three times higher than in the single P. falciparum infection. This implied that P. vivax might lead to the host immune response to the production of effector T killer cells. During the parasitaemic stage, the mixed PV-PF infection had the highest number of plasma antibodies against both P. vivax and P. falciparum. Interestingly, plasma from the group of single P. vivax or P. falciparum malaria infections had both anti-P. vivax and anti-P. falciparum antibodies. In addition, antigenic cross-reactivity of P. vivax or P. falciparum resulting in antibodies against both malaria species was shown in the supernatant of lymphocyte cultures cross-stimulated with either antigen of P. vivax or P. falciparum. The role of delta2 +/- TCR T cells and the antibodies against both species during acute mixed malaria infection could have an impact on the immunity to malaria infection.
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202
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Wang H, Wang Y, Cui L. P1.115 Central conduction deflcits assessments before and after repetitive transcranial stimulation: a multiple system atrophy case of parkinsonism type. Parkinsonism Relat Disord 2009. [DOI: 10.1016/s1353-8020(09)70237-8] [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: 10/20/2022]
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203
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Fu Q, Song XF, Liao GL, Deng CL, Cui L. POD-01.07: Study with Myoblasts Differentiated from Adipose-derived Stem Cells for Urinary Stress Incontinence. Urology 2009. [DOI: 10.1016/j.urology.2009.07.1212] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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204
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Shan T, Zhang W, Guo W, Cui L, Yuan C, Dai X, Shen Q, Yang Z, Zhu J, Hua X. The first detection of human bocavirus 2 infections in China. J Clin Virol 2009; 46:196-7. [DOI: 10.1016/j.jcv.2009.07.012] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2009] [Accepted: 07/15/2009] [Indexed: 11/30/2022]
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205
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Li C, Xu Y, Song L, Fu Q, Cui L, Yin S. MP-10.06: Urethral Reconstruction Using Oral Keratinocyte-Seeded Bladder Acellular Matrix Grafts (BAMGs). Urology 2009. [DOI: 10.1016/j.urology.2009.07.924] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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206
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Shan TL, Cui L, Dai XQ, Guo W, Shang XG, Yu Y, Zhang W, Kang YJ, Shen Q, Yang ZB, Zhu JG, Hua XG. Sequence analysis of an isolate of minute virus of canines in China reveals the closed association with bocavirus. Mol Biol Rep 2009; 37:2817-20. [PMID: 19760094 DOI: 10.1007/s11033-009-9831-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2009] [Accepted: 09/04/2009] [Indexed: 10/20/2022]
Abstract
In the present study, we have cloned and sequenced the nearly-full-length genome of minute virus of canines (MVC), SH26, in China. The genome of MVC, 5,132 nucleotides (nts) in length, contains three open reading frames (ORFs), which are 2,325-bp of NS1, 561-bp of NP1 and 2,112-bp of VP1/VP2 encoding three proteins of 774, 186 and 703 residues, respectively. Predicted amino acids sequence of NS1 of MVC has 44% identity with human bocavirus (HBoV) and human boacvirus 2 (HBoV2), NP1 has 48 and 45% identity with HBoV and HBoV2, VP1/VP2 has 45 and 46% identity with HBoV and HBoV2, respectively. Phylogenetic analysis showed that the present Chinese MVC strain was also closely clustered with the previous American and Japanese MVC isolates, and MVCs formed a different branch together with bovine parvovirus and HBoVs from other parvoviruses classified into Parvovirinae.
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207
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Dai J, Delun Wang, Cui L. Orientation and Workspace Analysis of the Multifingered Metamorphic Hand—Metahand. IEEE T ROBOT 2009. [DOI: 10.1109/tro.2009.2017138] [Citation(s) in RCA: 94] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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208
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Shan T, Guo W, Cui L, Shang X, Dai X, Yuan C, Yu Y, Zhang W, Zhu J, Shen Q, Yang Z, Hua X. The first detection of human parechovirus infections in China. J Clin Virol 2009; 45:371-2. [DOI: 10.1016/j.jcv.2009.05.033] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2009] [Accepted: 05/20/2009] [Indexed: 10/20/2022]
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209
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Shan T, Dai X, Guo W, Zhang W, Cui L, Yuan C, Shang X, Shen Q, Hua X. Human astrovirus infection in children with gastroenteritis in Shanghai. J Clin Virol 2009; 44:248-9. [DOI: 10.1016/j.jcv.2008.12.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2008] [Accepted: 12/19/2008] [Indexed: 10/21/2022]
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210
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Che C, Pang X, Hua X, Zhang B, Shen J, Zhu J, Wei H, Sun L, Chen P, Cui L, Zhao L, Yang Q. Effects of Human Fecal Flora on Intestinal Morphology and Mucosal Immunity in Human Flora-associated Piglet. Scand J Immunol 2009; 69:223-33. [DOI: 10.1111/j.1365-3083.2008.02211.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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211
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Kim H, Cui L, Kim J, Kim SJ. Transient receptor potential vanilloid type 1 receptor regulates glutamatergic synaptic inputs to the spinothalamic tract neurons of the spinal cord deep dorsal horn. Neuroscience 2009; 160:508-16. [PMID: 19236908 DOI: 10.1016/j.neuroscience.2009.02.019] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2009] [Revised: 02/09/2009] [Accepted: 02/10/2009] [Indexed: 10/21/2022]
Abstract
The spinothalamic tract (STT) neurons in the spinal dorsal horn play an important role in transmission and processing of nociceptive sensory information. Although transient receptor potential vanilloid type 1 (TRPV1) receptors are present in the spinal cord dorsal horn, their physiological function is not fully elucidated. In this study, we examined the role of TRPV1 in modulating neuronal activity of the STT neurons through excitatory and inhibitory synaptic inputs. Whole-cell patch-clamp recordings were performed on STT neurons labeled by a retrograde fluorescent tracer injected into the ventral posterior lateral (VPL) nucleus of the thalamus. Capsaicin (1 microM) increased the frequency of miniature excitatory postsynaptic currents (mEPSC) without changing the amplitude or decay time constant of mEPSC. In contrast, capsaicin had no distinct effect on GABAergic miniature inhibitory postsynaptic currents (mIPSC). Capsazepine (10 microM), a TRPV1 receptor antagonist, abolished the effect of capsaicin on mEPSCs. Capsazepine itself did not affect the baseline amplitude and frequency of mEPSC. The effect of capsaicin on mEPSC was also abolished by removal of external Ca(2+), but not by treatment with Cd(2+). Furthermore, capsaicin increased the firing activity of the STT neurons and this increase in neuronal activity by capsaicin was abolished in the presence of non-N-methyl-d-aspartic acid (NMDA) and NMDA receptor antagonists, 2,3-dihydroxy-6-nitro-7-sulfamoyl-benzo[f]quinoxaline-2,3-dione (NBQX) and (R)-amino-5-phosphonovaleric acid (APV). These data suggest that activation of TRPV1 potentiates the glutamate release from excitatory terminals of primary afferent fibers and subsequently increases the neural activity of STT neurons of the rat spinal cord deep dorsal horn.
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Liu M, Cui L. 7. The utility of the inching technique in diagnosis of motor nerve conduction block. Clin Neurophysiol 2009. [DOI: 10.1016/j.clinph.2008.10.025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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213
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Guan Y, Cui L. 98. Clinical and electrophysiological characters of Lambert–Eaton syndrome. Clin Neurophysiol 2009. [DOI: 10.1016/j.clinph.2008.10.116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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214
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Liu M, Cui L. 6. The value of single fiber electromyography in diagnosis of amyotrophic lateral sclerosis. Clin Neurophysiol 2009. [DOI: 10.1016/j.clinph.2008.10.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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215
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Bao L, Cai T, Koenig K, Fang K, Han J, Wang J, Liu Q, Ding L, Cui L, Luo Y, Wang Y, Li L, Wu N. PHYSICS: Learning and Scientific Reasoning. Science 2009; 323:586-7. [DOI: 10.1126/science.1167740] [Citation(s) in RCA: 119] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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216
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Cui L, Mahajan S, Cole RM, Soares B, Bartlett PN, Baumberg JJ, Hayward IP, Ren B, Russell AE, Tian ZQ. UV SERS at well ordered Pd sphere segment void (SSV) nanostructures. Phys Chem Chem Phys 2009; 11:1023-6. [DOI: 10.1039/b817803h] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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217
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Zhang W, Shen Q, Mou J, Gong G, Yang Z, Cui L, Zhu J, Ju G, Hua X. Hepatitis E virus infection among domestic animals in eastern China. Zoonoses Public Health 2008; 55:291-8. [PMID: 18638181 DOI: 10.1111/j.1863-2378.2008.01136.x] [Citation(s) in RCA: 93] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Hepatitis E virus (HEV) is a zoonotic pathogen of which several species of animal were reported as reservoirs. Antibodies to HEV and HEV RNA have been detected in some Chinese population and swine groups but few other domestic animals. In this study, to investigate the HEV prevalence, we tested sera from 788 pigs, 100 cows, 50 goats, 49 horses, 101 pet dogs, 105 chickens, 47 duck and 45 pigeons in eastern China for anti-HEV immunoglobulin G (IgG). We also tested 50% of the swine sera, all of sera from the other domestic animals and 13 Shanghai human sera which were positive for anti-HEV immunoglobulin M (IgM) for HEV RNA using reverse transcriptase-polymerase chain reaction. Our results indicated that 82.5% (222/269) of the sows, 53.9% (104/193) of the 4- to 6-month-old swine, 63.4% (168/265) of the 1- to 3-month-old swine, 55.7% (34/61) of the slaughterhouse swine, 24% (12/50) of the goats, 16.3% (8/49) of the horses, 17.8% (21/101) of the pet dogs, 6% (6/100) of the cows, 12.8% (6/47) of the ducks, 4.4% (2/45) of the pigeons and 1.9% (2/105) of the chickens exhibited positive for anti-HEV IgG. Inhibition assay confirmed the infection with HEV or HEV-like viruses in these domestic animals except pigeons and chickens. From the sera, we isolated 18 swine HEV strains, one horse HEV strain and two human HEV strains. Sequence analysis showed that the horse HEV isolate and one swine isolate belonged to genotype 3. The other isolates belonged to genotype 4. The two human isolates were phylogenetically closely related to eight of the swine isolates. In short, the presence of anti-HEV antibody had been confirmed in several species of domestic animals in eastern China and HEV RNA has been identified in swine, human and horse. This suggested that the authorities should pay more attention to the prevalence of HEV in eastern China.
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218
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Cui L, Liu C, Wu G. Performance and mechanism of methylene blue biosorption on orange peel. ENVIRONMENTAL TECHNOLOGY 2008; 29:1021-1030. [PMID: 18844129 DOI: 10.1080/00207210802166872] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Biosorption of Methylene Blue (MB) from aqueous solution using orange peel biosorbent was experimentally investigated. The effects of dye concentration, solution pH, salt concentration and contact time were investigated in a batch model. The results showed that adsorption equilibrium was reached within one hour at two initial MB concentrations (200 and 1000 mg 1(-1)). The uptake of MB was significantly affected by the pH of dye solution. As the pH decreased, the uptake of MB decreased and was zero at pH 2. The Langmuir isotherm model fitted the experimental data well, and the maximum adsorption capacities of the orange peel were 246.8 +/- 10.6 and 370.3 +/- 31.0 mg g(-1) at pH 7 and pH 10, respectively. The uptake of MB was significantly affected by the high concentration of salts. Adsorption of MB onto orange peel was reversible, and the sorption/desorption efficiencies remained almost 100% even up to seven reuse cycles when the biosorbent loss was taken into consideration. The binding sites were identified to be primary carboxyl groups present in orange peel. The main mechanism of MB adsorption is considered to be electrostatic interaction.
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219
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Cui L, Ju Y, Ding L, Trejo-Morales M, Olfert IM. Arteriolar and Venular Capillary Distribution in Skeletal Muscles of Old Rats. J Gerontol A Biol Sci Med Sci 2008; 63:928-35. [DOI: 10.1093/gerona/63.9.928] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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220
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Hu XY, Hu CH, Fang XM, Cui L, Zhang QH. Intraparenchymal epidermoid cysts in the brain: diagnostic value of MR diffusion-weighted imaging. Clin Radiol 2008; 63:813-8. [DOI: 10.1016/j.crad.2008.01.008] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2007] [Revised: 01/20/2008] [Accepted: 01/28/2008] [Indexed: 11/24/2022]
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221
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Wang Q, Fan X, Yuan J, Wang P, Cui L, Chen J. Optimization of Two‐Step Cotton Scouring with β‐Cyclodextrin and Alkaline Pectinase. Eng Life Sci 2008. [DOI: 10.1002/elsc.200700043] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
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222
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Ohuchida K, Mizumoto K, Miyasaka Y, Yu J, Cui L, Yamaguchi H, Toma H, Takahata S, Sato N, Nagai E, Yamaguchi K, Tsuneyoshi M, Tanaka M. Over-expression of S100A2 in pancreatic cancer correlates with progression and poor prognosis. J Pathol 2007; 213:275-82. [PMID: 17940995 DOI: 10.1002/path.2250] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Controversy exists regarding the clinical significance of S100A2 in the progression of tumours. In pancreatic cancer, little is known about the role of S100A2. The aim of this study was to clarify the clinical significance of S100A2 expression in pancreatic carcinogenesis. We microdissected invasive ductal carcinoma (IDC) cells from 22 lesions, pancreatic intraepithelial neoplasia (PanIN) cells from five lesions, intraductal papillary mucinous neoplasm (IPMN) cells from 38 lesions, pancreatitis-affected epithelial (PAE) cells from 16 lesions, and normal ductal cells from 18 normal pancreatic tissues. S100A2 expression in 14 pancreatic cancer cell lines, microdissected cells and formalin-fixed paraffin-embedded (FFPE) samples was examined by quantitative reverse transcription-polymerase chain reaction (qRT-PCR). Microdissection analyses revealed that IDC cells expressed higher levels of S100A2 than did IPMN, PAE or normal cells (all comparisons, p < 0.007). Cell lines from metastatic sites expressed higher levels of S100A2 than those from primary sites. PanIN cells expressed higher levels of S100A2 than normal cells (p = 0.018). IDC cells associated with poorly differentiated adenocarcinoma expressed higher levels of S100A2 than did IDC cells without poorly differentiated adenocarcinoma (p = 0.006). Analyses of FFPE samples revealed that levels of S100A2 were higher in samples from patients who survived < 1000 days after surgery than in those from patients who survived > 1000 days (p = 0.043). Immunohistochemical analysis was consistent with qRT-PCR. S100A2 may be a marker of tumour progression or prognosis in pancreatic carcinogenesis and pancreatic cancer.
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223
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Qu H, Cui L, Rickers-Haunerland J, Haunerland NH. Fatty acid-dependent expression of the muscle FABP gene - comparative analysis of gene control in functionally related, but evolutionary distant animal systems. Mol Cell Biochem 2007; 299:45-53. [PMID: 17001452 DOI: 10.1007/s11010-005-9036-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The heart is the most fatty acid-dependent muscle in mammals, but flight muscles of birds and insects encounter even higher rates of fatty acid oxidation. The amount of the muscle fatty acid binding protein (H-FABP) found in these muscle reflects their metabolic activities, and increased fatty acid metabolism in endurance exercise increases FABP expression further. We have studied the mechanism of fatty acid-dependent expression of the H-FABP gene, taking advantage of the comparative analysis of gene control in functionally related, but evolutionary distant animal systems, i.e., rat heart and locust flight muscle. Luciferase reporter genes with a full-length promoter ( approximately 1 kb) from either the locust or the rat were strongly expressed in L6 myoblasts, and the expression of both constructs was markedly increased by fatty acid treatment. Because of its stronger induction by fatty acids and the absence of other vertebrate transcription factor binding sites, the locust promoter was advantageous for the identification of a fatty acid response element (FARE), an inverted repeat of a hexanucleotide half site reminiscent of steroid hormone receptor binding sites (IR-3). All mammalian H-FABP promoters contain similar sequences, however in reverse orientation (everted repeats, ER-3). Deletion of the FARE eliminated the fatty acid inducibility completely for the locust promoter, but only partly for its mammalian analogue, perhaps because of additional factors or more complex interactions. In gel shift studies, the element binds nuclear proteins from both rat cells and locust flight muscle, further attesting to the far-reaching conservation of this mechanism. Two individual proteins bind to the element, with full binding requiring the presence of free fatty acid. Antibodies to PPARs failed to induce a supershift of the protein-DNA complex, indicating that other transcription factors are responsible for the fatty acid-mediated induction of gene expression of H-FABP.
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224
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Cao Y, Liu W, Zhou G, Cui L. Tissue Engineering and Tissue Repair in Immunocompetent Animals: Tissue Construction and Repair. HANDCHIR MIKROCHIR P 2007; 39:156-60. [PMID: 17602376 DOI: 10.1055/s-2007-965329] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
Abstract
Tissue engineering can regenerate autologous tissue using a biodegradable scaffold and in vitro expanded cells derived from small biopsy samples, and thus may have great potential for tissue repair and reconstruction in plastic and reconstructive surgery. As an important step towards a clinical application, research work in large animals is essential. This article presents our experience of tissue engineering and repair in large animals in the areas of bone, cartilage and tendon.
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225
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Cui L, Liu QH, Wang HX, Ng TB. An alkaline protease from fresh fruiting bodies of the edible mushroom Pleurotus citrinopileatus. Appl Microbiol Biotechnol 2007; 75:81-5. [PMID: 17216442 DOI: 10.1007/s00253-006-0801-z] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2006] [Revised: 12/06/2006] [Accepted: 12/06/2006] [Indexed: 11/25/2022]
Abstract
A protease was purified from fresh fruiting bodies of the edible mushroom Pleurotus citrinopileatus. The isolation procedure included ion exchange chromatography on DEAE-cellulose, CM-cellulose, and Q-Sepharose and fast protein liquid chromatography-gel filtration on Superdex 75. The protease was unadsorbed on DEAE-cellulose and Q-Sepharose, but adsorbed on CM-cellulose. In sodium dodecyl sulfate-polyacrylamide gel electrophoresis, the protease demonstrated a single band with a molecular mass of 28 kDa. The protease showed an optimal pH at 10 and an optimal temperature at 50 degrees C. The activity of the protease was not affected by EDTA, indicating that it is not a metalloprotease. The protease exhibited a higher activity in the presence of K(+) and Li(+), but its activity was potently inhibited by Al(3+), Cu(2+), and Hg(2+) ions. It manifested a K (m) of 3.44 mg/ml and a V (max) of 0.139 mg ml(-1) min(-1). It was devoid of ribonuclease and antifungal activities.
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226
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Yuan C, Yang Z, Zhu J, Cui L, Hua X. Effect of an Immunosuppressor (Dexamethasone) on Eperythrozoon Infection. Vet Res Commun 2007; 31:661-4. [PMID: 17287887 DOI: 10.1007/s11259-007-0029-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/26/2006] [Indexed: 10/23/2022]
Abstract
The aim was to study the relationship between the infection rate of Eperythrozoon suis and the status of the immune system. Four pigs with chronic eperythrozoonosis were divided into experimental and control groups. Immunosuppression of the experimental group was accomplished by injecting with high-dose glucocorticoid (dexamethasone) on 3 consecutive days. Microscopic examination of blood smears was performed to observe the change of infection rate after administration. The blood samples of each group were collected on day 7 after administration for half-nested PCR assay. The microscopic results showed that the infection rate of the experimental group rose distinctly by 40 h late and remained at 90% in the days following administration. No changes were observed in the control group. PCR results showed a single expected 250 bp fragment in each group, which validated the positive microscopic results. This study demonstrated the significant effect of dexamethasone (DEX) on Eperythrozoon infection.
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Wang X, Hua TC, Yang GH, Cui L, Liu W, Cao YL. The cryopreservation of a tissue engineered dermal replacement by programmed freezing. CONFERENCE PROCEEDINGS : ... ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL CONFERENCE 2007; 2006:494-7. [PMID: 17282224 DOI: 10.1109/iembs.2005.1616455] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Long-term storag of engineered bio-artificial tissues is required to ensure the off-the-shelf availability to clinicians due to their long production cycle. Cryopreservation is likely the choice for long-term preservation. This study investigated the effects of dimethyl sulfoxide (DMSO) concentrations, cooling rates, cryoprotectant medium treatment methods and seeding on the cell viability of a tissue-engineered dermal substitute. The dermal fibroblast was cultured on a polyglycolic acid (PGA) scaffolding at 37degree C and a 5% CO<inf>2</inf>atmosphere for 14 days, and dermal slices (10×3×1.5mm) were used in the experimental group. The freezing was carried out in a computer-controlled programmable freezer at 0.5degree C/min, 1degree C/min and 2degree C/min in1.4M, 2.1M and 2.8M DMSO from 4degree C to -60degree C and then plunged into the liquid nitrogen tank immediately. After 24th of cryopreservation, the samples wereped in removed from liquid nitrogen and placed at room temperature in air for 0.5-1min, prior to submergence in a water bath at 37 degree C. viability of fresh control and cryopreserved dermal slices were determined with our modification of the MTT (3-[4,5-Dimethythiazol-2-yl] -2,5-diphenyltetrazolium bromide) assay. The effects of two cryoprotectant medium treatment methods and seeding (at -7degree C)on cell viability were also assessed. A cryopreservation protocol of 1degree C/min in 1.4M DMSO from 4degree C to -60degree C, and seeding at -7degree C proved optimal for this tissue-engineered dermal replacement, provided the dermal slice was transferred into the cryopreservation bag containing 1mL 1.4M DMSO bag and hold for 15min at 4degree C prior to freezing.
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Yu W, Li S, Fang J, Sun X, Cui L, Fu J, Bai Y, Fang Y, Shangguan B. 368 FIELD STUDIES ON THE EFFECTIVENESS OF THE YCD EMBRYO SEXING TECHNIQUE IN BOVINE. Reprod Fertil Dev 2007. [DOI: 10.1071/rdv19n1ab368] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
The YCD sexing technique is applied in many commercial breeding programs due to its ease of operation in the field and its reliable and accurate sex determination results. Less equipment requirements and more simplified protocols provide great convenience for field applications of this method, and processing errors and chances of assay contamination are reduced. To increase the effectiveness of this technique in future field applications, field data collected from commercial embryo transfer programs in 63 farms in China during June 2002 to December 2005 were analyzed. Embryos were flushed from superovulated dairy cattle and subjected to a biopsy for sex determination using protocols and YCD sexing kits supplied by AB Technology Ltd. (Pullman, WA, USA). Embryos were implanted fresh on the same day or frozen with AG freeze medium (AB Technology Ltd.) for later transfer. The chi-square test was used for statistic analysis. This study indicates that sampling with a piece of zona pellucida (ZP) during embryo sexing increased the incidence of no response (NR) but did not alter the accuracy of determining sex of offspring. Larger biopsies significantly reduced the incidence of NR after DNA amplification and electrophoresis separation, and increased the accuracy of sex determination of calves (from 88.1%, 111/126 to 98.5%, 129/131; P < 0.01). Biopsies containing dead and/or detached cells did not increase the NR incidence, but decreased the accuracy of sex determination of calves from 93.4% (240/257) to 86.6% (58/67; P < 0.05). There were no relationships between NR incidences and embryo quality, nor between the sex determination accuracy of calves and embryo quality or stages. However, the NR incidence increased for PCR analyses of earlier development stages (5.1% at morula to early blastocyst) compared to blastocyst (3.2%) and expanded blastocyst (2.2%; P < 0.05). The sex determination accuracy decreased to 77.4% (65/84) when embryos with unclear or expanded and faint female electrophoresis bands were transferred compared to those with clear bands (97.1%, 233/240). Field data suggest that larger biopsies during embryo sexing favor the effectiveness and accuracy of the YCD technique; however, increased sample size may affect the embryo survival, resulting in a decrease in the pregnancy success of embryo transfer. Reduced accuracy in YCD analyses using dead or detached blastomeres may be caused by the loss of male genes in dead or degenerated cells. Increased NR incidence in sampling of ZP for analysis may be due to biopsy loss when transferring the biopsy at the sampling step of the YCD method. In addition, the accuracy of sexing will be lower when embryos with unclear electrophoresis results are used. It is concluded that a proper and stage-dependent size of biopsy should be collected and used to ensure the accuracy of sex determination without reducing embryo survival, and the inclusion of a few live cells in a biopsy is important to the success of the sexing determination of this technique.
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Umino Y, Everhart D, Solessio E, Cusato K, Pan JC, Nguyen TH, Brown ET, Hafler R, Frio BA, Knox BE, Engbretson GA, Haeri M, Cui L, Glenn AS, Charron MJ, Barlow RB. Hypoglycemia leads to age-related loss of vision. Proc Natl Acad Sci U S A 2006; 103:19541-5. [PMID: 17159157 PMCID: PMC1697832 DOI: 10.1073/pnas.0604478104] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The retina is among the most metabolically active tissues in the body, requiring a constant supply of blood glucose to sustain function. We assessed the impact of low blood glucose on the vision of C57BL/6J mice rendered hypoglycemic by a null mutation of the glucagon receptor gene, Gcgr. Metabolic stress from moderate hypoglycemia led to late-onset loss of retinal function in Gcgr(-/-) mice, loss of visual acuity, and eventual death of retinal cells. Retinal function measured by the electroretinogram b-wave threshold declined >100-fold from age 9 to 13 months, whereas decreases in photoreceptor function measured by the ERG a-wave were delayed by 3 months. At 10 months of age Gcgr(-/-) mice began to lose visual acuity and exhibit changes in retinal anatomy, including an increase in cell death that was initially more pronounced in the inner retina. Decreases in retinal function and visual acuity correlated directly with the degree of hypoglycemia. This work demonstrates a metabolic-stress-induced loss of vision in mammals, which has not been described previously. Linkage between low blood glucose and loss of vision in mice may highlight the importance for glycemic control in diabetics and retinal diseases related to metabolic stress as macular degeneration.
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Abstract
BACKGROUND Both detectable serum cardiac troponin I (cTnI) and ventricular dysrhythmias are common in patients with chronic heart failure (CHF) and are paralleled with the severity of the CHF. However, the relationship between serum cTnI and ventricular arrhythmia severity in patients with CHF remains unknown; the mechanism of the ventricular arrhythmia in the CHF patients also remains unclear. MATERIALS AND METHODS The study group included 218 patients with CHF who had cTnI assay drawn at the time of initial presentation. Patients with acute myocardial infarction or myocarditis were excluded from the analysis. The patients were divided into two groups: cTnI-positive with serum cTnI > 0.5 ng mL(-1) (n = 98) and cTnI-negative with serum cTnI < or = 0.5 ng mL(-1) (n = 120). The severity of ventricular dysrhythmias was assessed by 24-h Holter monitoring, using prospectively defined measures of ventricular arrhythmic burden. RESULTS Prevalence of risk factors for ventricular dysrhythmias was equal in both groups. All measures of ventricular ectopy were much higher in patients of the cTnI-positive groups. Mean hourly ventricular pairs (13.59 +/- 10.3 vs. 11.1 +/- 6.01, P = 0.027), mean hourly repetitive ventricular beats (26.01 +/- 13.67 vs. 22.01 +/- 13.56, P = 0.032), and the frequency of ventricular tachycardia episodes per 24 h (12.54 +/- 16.68 vs. 7.68 +/- 11.54, P = 0.012) were higher in patients with detectable cTnI levels. After inclusion of clinical variables and drug therapies in a multivariate analysis, the positive relationship between cTnI and the frequency of ventricular pairs (P = 0.03), repetitive ventricular beats (P = 0.037), and ventricular tachycardia (P = 0.03) remained independent. In multivariate logistic regression, the risk of developing ventricular tachycardia was higher in patients with detectable cTnI levels with an adjusted odds ratio (OR) of 2.31 (95% CI, 1.22-2.65, P = 0.003). CONCLUSIONS In patients with CHF, serum cTnI is closely related to increased occurrence of ventricular dysrhythmias and could identify a subgroup of patients with ventricular tachycardia. The minimal myocardial injury detected by serum cTnI might be the abnormal substrate for ventricular dysrhythmias.
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231
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Philipp S, Krieg T, Cui L, Cohen M, Downey J. A133. DADLE but not bradykinin activates Src and PI3-kinase through the EGF receptor. J Mol Cell Cardiol 2006. [DOI: 10.1016/j.yjmcc.2006.03.365] [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: 11/28/2022]
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232
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Guo ZP, Zhao YG, Zhang WY, Cui L, Guo SM, Luo LB. Effect of Ga and Mn doping on structural, electrical transport and magnetic properties of Na(0.75)CoO(2). JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2006; 18:4381-4388. [PMID: 21690789 DOI: 10.1088/0953-8984/18/17/023] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The effects of doping with magnetic Mn ions or nonmagnetic Ga ions on the structural, electrical transport and magnetic properties of Na(0.75)CoO(2) have been investigated. It has been found that the lattice parameter c of the samples increases with Ga or Mn ion doping. Ga doping raises the electrical resistivity of Na(0.75)CoO(2), but the metallic conducting behaviour of the compound has not been influenced. In contrast, 5% Mn doping leads to a metal-insulator transition at low temperatures in Na(0.75)Co(1-y)Mn(y)O(2). The susceptibility of the Ga doped sample shows strong magnetic field dependence, while the susceptibility of the Mn doped samples is not very sensitive to the magnetic field. This work implies that magnetic interaction plays an important role in Na(x)CoO(2).
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233
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Cottrell JJ, Stoll B, Buddington RK, Stephens JE, Cui L, Chang X, Burrin DG. Glucagon-like peptide-2 protects against TPN-induced intestinal hexose malabsorption in enterally refed piglets. Am J Physiol Gastrointest Liver Physiol 2006; 290:G293-300. [PMID: 16166344 DOI: 10.1152/ajpgi.00275.2005] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Premature infants receiving chronic total parenteral nutrition (TPN) due to feeding intolerance develop intestinal atrophy and reduced nutrient absorption. Although providing the intestinal trophic hormone glucagon-like peptide-2 (GLP-2) during chronic TPN improves intestinal growth and morphology, it is uncertain whether GLP-2 enhances absorptive function. We placed catheters in the carotid artery, jugular and portal veins, duodenum, and a portal vein flow probe in piglets before providing either enteral formula (ENT), TPN or a coinfusion of TPN plus GLP-2 for 6 days. On postoperative day 7, all piglets were fed enterally and digestive functions were evaluated in vivo using dual infusion of enteral ((13)C) and intravenous ((2)H) glucose, in vitro by measuring mucosal lactase activity and rates of apical glucose transport, and by assessing the abundances of sodium glucose transporter-1 (SGLT-1) and glucose transporter-2 (GLUT2). Both ENT and GLP-2 pigs had larger intestine weights, longer villi, and higher lactose digestive capacity and in vivo net glucose and galactose absorption compared with TPN alone. These endpoints were similar in ENT and GLP-2 pigs except for a lower intestinal weight and net glucose absorption in GLP-2 compared with ENT pigs. The enhanced hexose absorption in GLP-2 compared with TPN pigs corresponded with higher lactose digestive and apical glucose transport capacities, increased abundance of SGLT-1, but not GLUT-2, and lower intestinal metabolism of [(13)C]glucose to [(13)C]lactate. Our findings indicate that GLP-2 treatment during chronic TPN maintains intestinal structure and lactose digestive and hexose absorptive capacities, reduces intestinal hexose metabolism, and may facilitate the transition to enteral feeding in TPN-fed infants.
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234
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Mascorro CN, Zhao K, Khuntirat B, Sattabongkot J, Yan G, Escalante AA, Cui L. Molecular evolution and intragenic recombination of the merozoite surface protein MSP-3alpha from the malaria parasite Plasmodium vivax in Thailand. Parasitology 2005; 131:25-35. [PMID: 16038393 DOI: 10.1017/s0031182005007547] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
The merozoite surface antigens of malaria parasites are prime anti-morbidity/mortality vaccine candidates. However, their highly polymorphic nature requires extensive surveys of parasite populations to validate vaccine designs. Previous studies have found 3 molecular types (A, B and C) of the Plasmodium vivax merozoite surface protein 3a (PvMSP-3alpha) among parasite field populations. Here we analysed complete PvMSP-3alpha sequences from 17 clinical P. vivax isolates from Thailand and found that the nucleotide diversity was as high as that from samples widely separated by time and space. The polymorphic sites were not randomly distributed but concentrated in the N-terminal Ala-rich domain (block 2A), which is partially deleted in type B and C sequences. The size variations among type A sequences were due to small indels occurring in block 2A, whereas type B and C sequences were uniform in length with each type having a different large deletion. Analysis of synonymous and non-synonymous substitutions suggested that different selection forces were operating on different regions of the molecule. The numerous recombination sites detected within the Ala-rich domain suggested that intragenic recombination was at least partially responsible for the observed genetic diversity of the PvMSP-3alpha gene. Phylogenetic analysis failed to link any alleles to a specific geographical origin, even when different domains of PvMSP-3alpha were used for analysis. The highly polymorphic nature and lack of geographical clustering of isolates suggest that more systematic investigations of the PvMSP-3alpha gene are needed to explore its evolution and vaccine potential.
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235
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Wang HT, Tu Y, Fu CG, Meng RG, Cui L, Xu HL, Yu DH. Diffuse cavernous hemangioma of the rectosigmoid colon. Tech Coloproctol 2005; 9:145-8. [PMID: 16007358 DOI: 10.1007/s10151-005-0214-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/10/2005] [Accepted: 06/10/2005] [Indexed: 10/25/2022]
Abstract
Diffuse cavernous hemangioma of the rectosigmoid colon is an uncommon benign vascular lesion. We report 5 cases of diffuse cavernous hemangioma, focusing on the clinical features, diagnosis procedure and treatment. Five patients have undergone sphincter-saving procedures, 3 cases had coloanal sleeve anastomoses and 1 patient each had pull-through anastomosis and lower anterior resection. During the follow-up, which ranged from 3 to 10 years, 3 patients had no further anal bleeding and 2 patients had minor intermittent anal bleeding. Continence for normal stool was satisfactory in all patients. In conclusion, sphincter-saving procedure is most appropriate and curative approach for the treatment of diffuse cavernous hemangioma. Imaging study plays an important role in the diagnosis, preoperative staging and follow-up.
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Mathieu-Costello O, Ju Y, Trejo-Morales M, Cui L. Greater capillary-fiber interface per fiber mitochondrial volume in skeletal muscles of old rats. J Appl Physiol (1985) 2005; 99:281-9. [PMID: 15774695 DOI: 10.1152/japplphysiol.00750.2004] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The objective was to examine whether muscle structural capacity for O2 flux (i.e., capillary-to-fiber surface ratio) relative to fiber mitochondrial volume deteriorates with the muscle atrophy of aging in predominantly slow- (soleus, S) and fast-twitch (extensor digitorum longus, EDL) muscles of old (24 mo) and very old (35 mo) F344BN rats compared with adult (12 mo old). Wet muscle mass decreased 29% (196 +/- 4 to 139 +/- 5 mg) in S and 22% (192 +/- 3 to 150 +/- 3 mg) in EDL between 12 and 35 mo of age, without decline in body mass. Capillary density increased 65% (1,387 +/- 54 to 2,291 +/- 238 mm(-2)) in S and 130% (964 +/- 95 to 2,216 +/- 311 mm(-2)) in EDL, because of the muscle fiber atrophy, whereas capillary per fiber number remained unchanged. Altered capillary geometry, i.e., lesser contribution of tortuosity and branching to capillary length, was found in S at 35 compared with 12 and 24 mo, and not in EDL. Accounting for capillary geometry revealed 55% (1,776 +/- 78 to 2,750 +/- 271 mm(-2)) and 113% (1,194 +/- 112 to 2,540 +/- 343 mm(-2)) increases in capillary length-to-fiber volume ratio between 12 and 35 mo of age in S and EDL, respectively. Fiber mitochondrial volume density was unchanged over the same period, causing mitochondrial volume per micrometer fiber length to decrease in proportion to the fiber atrophy in both muscles. As a result of the smaller fiber mitochondrial volume in the face of the unchanged capillary-to-fiber number ratio, capillary-to-fiber surface ratio relative to fiber mitochondrial volume not only did not deteriorate, but in fact increased twofold in both muscles between 12 and 35 mo of age, independent of their different fiber type.
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237
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Wang X, Hua T, Yang G, Cui L, Liu W, Cao Y. Metabolic Activity and Functional Evaluation of Cryopreserved Dermal Equivalent. ACTA ACUST UNITED AC 2004. [DOI: 10.1089/153834404774101963] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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238
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Teng R, Johkura K, Ogiwara N, Zhao X, Cui L, Iida I, Okouchi Y, Asanuma K, Sasaki K. Morphological analysis of leucocyte transmigration in the pleural cavity. J Anat 2003; 203:391-404. [PMID: 14620379 PMCID: PMC1571173 DOI: 10.1046/j.1469-7580.2003.00231.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
The role that pleural mesothelial cells play in leucocyte transmigration into the pleural cavity was investigated in lipopolysaccharide-stimulated mice. Changes in mesothelial cell morphology and changes in expression of adhesion molecules on mesothelial cells and leucocytes were analysed by light microscopy, immunohistochemistry, transmission electron microscopy (TEM) and immuno-scanning electron microscopy (immuno-SEM). After stimulation, the mesothelial cells separated completely from one another before leucocyte penetration across the mesothelial layer occurred. These changes occurred primarily in the immediate vicinity of ribs, where a large number of leucocytes accumulated. Immuno-SEM showed that the expression of intercellular adhesion molecule-1 (ICAM-1) on the parietal pleural mesothelial cells was significantly up-regulated by lipopolysaccharide stimulation, and that of vascular cell adhesion molecule-1 (VCAM-1) was induced. Both were restricted to the microvilli of the mesothelial cells. By contrast, expression of intercellular adhesion molecule-2 (ICAM-2), platelet/endothelial cell adhesion molecule-1 (PECAM-1), mucosal addressin cell adhesion molecule-1 (MAdCAM-1), endothelial leucocyte adhesion molecule-1 (ELAM-1), peripheral node addressin (PNAd) and fibronectin were not detected. Lymphocyte function associated antigen-1 (LFA-1), macrophage-1 molecule (Mac-1) and very late appearing antigen-4 (VLA-4), all ligands of ICAM-1 and VCAM-1, were present on the transmigrated neutrophils and macrophages. These findings demonstrate that the immediate vicinity of ribs is a source of leucocyte migration into the pleural space.
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239
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Qi J, Zhang J, Zhang S, Cui L, He W. Immobilized MICA could expand human Vdelta1 gammadelta T cells in vitro that displayed major histocompatibility complex class I chain-related A-dependent cytotoxicity to human epithelial carcinomas. Scand J Immunol 2003; 58:211-20. [PMID: 12869143 DOI: 10.1046/j.1365-3083.2003.01288.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Human major histocompatibility complex class I chain-related A (MICA) is a human leucocyte antigen-related polymorphic molecule, which is expressed on many kinds of epithelial tumours and can be recognized by the Vdelta1 subset of gammadelta T cells. In the present study, monoclonal antibodies (MoAbs) were produced in mice immunized with recombinant MICA (rMICA)*008. It was found that MICA was expressed on ovarian and colonic tumour tissues and could be detected by these anti-MICA MoAbs. The immobilized rMICA could induce the proliferation of human ovarian epithelial carcinoma- or colonic carcinoma-derived gammadelta T cells of the Vdelta1 phenotype in vitro. These Vdelta1 T cells displayed a strong, broad-range cytolytic activity towards tumour cell lines positive for MICA. The efficiency of this cytolytic activity depended greatly on the level of MICA expressed on the cell surface and could be inhibited by anti-MICA MoAbs. Therefore, MICA may play an important role in immune responses against epithelial tumours and function as a stimulating factor for the growth of Vdelta1 gammadelta T cells, whereas MICA-reactive Vdelta1 gammadelta T cells might serve as a new candidate for adoptive cellular therapy of tumours.
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MESH Headings
- Adult
- Aged
- Animals
- Antibodies, Monoclonal
- Carcinoma/immunology
- Cloning, Molecular
- Colonic Neoplasms/immunology
- Cytotoxicity, Immunologic
- Female
- Gene Expression Regulation, Neoplastic
- Histocompatibility Antigens Class I/biosynthesis
- Histocompatibility Antigens Class I/genetics
- Histocompatibility Antigens Class I/immunology
- Humans
- Immunohistochemistry
- Male
- Mice
- Mice, Inbred BALB C
- Middle Aged
- Ovarian Neoplasms/immunology
- RNA, Neoplasm/genetics
- RNA, Neoplasm/metabolism
- Receptors, Antigen, T-Cell, gamma-delta/immunology
- Reverse Transcriptase Polymerase Chain Reaction
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240
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Choudhuri R, Cui L, C et al. Y. Cortical spreading depression and gene regulation: relevance to migraine. Headache 2003. [DOI: 10.1046/j.1526-4610.2003.03085_12.x] [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]
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241
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Gelling RW, Du XQ, Dichmann DS, Romer J, Huang H, Cui L, Obici S, Tang B, Holst JJ, Fledelius C, Johansen PB, Rossetti L, Jelicks LA, Serup P, Nishimura E, Charron MJ. Lower blood glucose, hyperglucagonemia, and pancreatic alpha cell hyperplasia in glucagon receptor knockout mice. Proc Natl Acad Sci U S A 2003; 100:1438-43. [PMID: 12552113 PMCID: PMC298791 DOI: 10.1073/pnas.0237106100] [Citation(s) in RCA: 435] [Impact Index Per Article: 20.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Glucagon, the counter-regulatory hormone to insulin, is secreted from pancreatic alpha cells in response to low blood glucose. To examine the role of glucagon in glucose homeostasis, mice were generated with a null mutation of the glucagon receptor (Gcgr(-/-)). These mice display lower blood glucose levels throughout the day and improved glucose tolerance but similar insulin levels compared with control animals. Gcgr(-/-) mice displayed supraphysiological glucagon levels associated with postnatal enlargement of the pancreas and hyperplasia of islets due predominantly to alpha cell, and to a lesser extent, delta cell proliferation. In addition, increased proglucagon expression and processing resulted in increased pancreatic glucogen-like peptide 1 (GLP-1) (1-37) and GLP-1 amide (1-36 amide) content and a 3- to 10-fold increase in circulating GLP-1 amide. Gcgr(-/-) mice also displayed reduced adiposity and leptin levels but normal body weight, food intake, and energy expenditure. These data indicate that glucagon is essential for maintenance of normal glycemia and postnatal regulation of islet and alpha and delta cell numbers. Furthermore, the lean phenotype of Gcgr(-/-) mice suggests glucagon action may be involved in the regulation of whole body composition.
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Zhu CF, Shang GY, Li BS, Wang C, Cui L, Xie P, Zhang RB. Studies of photosensitive alignment layer based on ladder-like polysilsequioxane liquid-crystal devices using atomic force microscopy/force curve. SURF INTERFACE ANAL 2003. [DOI: 10.1002/sia.1555] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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243
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Ogawa K, Hirose M, Sugiura S, Cui L, Imaida K, Ogiso T, Shirai T. Dose-dependent promotion by phenylethyl isothiocyanate, a known chemopreventer, of two-stage rat urinary bladder and liver carcinogenesis. Nutr Cancer 2002; 40:134-9. [PMID: 11962248 DOI: 10.1207/s15327914nc402_9] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
The effects of phenylethyl isothiocyanate (PEITC) on urinary bladder and liver carcinogenesis were analyzed in a rat model. Diets containing 0.1%, 0.05%, or 0.01% PEITC were administered for 32 wk to male Fischer 344 rats with and without pretreatment with an injection of diethylnitrosamine (200 mg/kg body wt i.p.) and 0.05% N-butyl-N-(4-hydroxybutyl)nitrosamine in the drinking water for 4 wk for initiation. In the initiated groups, PEITC administration significantly increased the incidences of papillary or nodular hyperplasia, dysplasia, and transitional cell carcinomas at higher doses of 0.01%, 0.01%, and 0.05%, respectively, compared with the control group, given initiation alone, in a dose-dependent manner. Without initiation, administration of 0.1% and 0.05% PEITC induced simple and papillary or nodular hyperplasia and dysplasia in the urinary bladder. In the liver, induction of glutathione S-transferase placental form-positive foci was dose dependently enhanced by PEITC administration, but the incidences of liver tumors were not different among the groups. From the present experiment, we can conclude that > 0.01% PEITC enhances rat urinary bladder carcinogenesis, while weakly promoting hepatocarcinogenesis. In addition, it is suggested that > 0.05% PEITC has tumorigenic potential.
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244
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Wang H, Wang Y, Wang D, Cui L, Tian S, Zhang Y. Cognitive impairment in Parkinson's disease revealed by event-related potential N270. J Neurol Sci 2002; 194:49-53. [PMID: 11809166 DOI: 10.1016/s0022-510x(01)00674-8] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Disturbed cognitive function is a well-recognized feature of idiopathic Parkinson's disease (PD). The aim of this study was to find a susceptive index to reveal the minor cognitive impairment in PD patients. Thirty PD patients without clinical dementia and thirty-four age-matched normal controls performed a matching task while event-related potentials (ERPs) were recorded from their scalp. There were two kinds of stimulus pairs in this study: match condition, the second stimulus (S2) in a pair was identical to the first one (S1); conflict condition, S2 conflicted with S1 in the color attribute. Subjects were required to press a button in the match condition and another button in the conflict condition. A negative ERP component, N270, which was considered to reflect the conflict processing activity in human brain, was evoked by the S2 of the conflict condition. The patient group showed a delayed and smaller N270 than the control group. The prolongation of its peak latency was significant at P3 and P4 electrodes and the reduction of its mean amplitude was significant at P3 electrode. The amplitude of P300 elicited in the match condition was decreased in the patient group at P4 electrode but its latency did not differ from the control group. These results indicate that PD patients as a group showed cognitive decline even in the absence of clinical dementia. N270 is a sensitive index in revealing this minor cognitive impairment.
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245
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Cui L, Rajasekariah GR, Martin SK. A nonspecific nucleoside hydrolase from Leishmania donovani: implications for purine salvage by the parasite. Gene 2001; 280:153-62. [PMID: 11738828 DOI: 10.1016/s0378-1119(01)00768-5] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
In contrast to their mammalian hosts, protozoan parasites do not synthesize purines de novo, but depend on preformed nucleotides that they purportedly obtain by salvage pathways. Nucleoside hydrolases may play a crucial role in that salvage process. By screening Leishmania donovani libraries with polyclonal antibodies against promastigote soluble exo-antigens, we have identified a cDNA encoding a protein with significant homology to nonspecific and uridine-inosine-preferring nucleoside hydrolases. Sequence comparison demonstrated that all the residues involved in Ca(2+)-binding and substrate recognition in the active site are conserved among the characterized protozoan nucleoside hydrolases. Genomic analysis suggests that it is a single copy gene in L. donovani, and its homologues are present in members representing other Leishmania species complexes. Both Northern blot and immunoblot analyses indicate that it is constitutively expressed in L. donovani promastigotes. The recombinant enzyme overexpressed in and purified from bacteria showed significant activity with all naturally occurring purine and pyrimidine nucleosides, and efficient utilization of p-nitrophenyl-beta-D-ribofuranoside as a substrate. Altogether, the sequence comparison and substrate specificity data identify this L. donovani nucleoside hydrolase as a nonspecific nucleoside hydrolase. Further, the nucleoside hydrolase was localized to specific foci in L. donovani promastigotes by immunofluorescent assays. Although the conservation of the nucleoside hydrolases among protozoan parasites offers promise for the design of broad-spectrum anti-parasitic drugs, the existence of multiple and distinct nucleoside hydrolases in a single species demands special consideration.
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MESH Headings
- Amino Acid Sequence
- Animals
- Base Sequence
- Blotting, Northern
- Blotting, Southern
- Blotting, Western
- Cloning, Molecular
- DNA, Complementary/chemistry
- DNA, Complementary/genetics
- DNA, Protozoan/genetics
- Escherichia coli/genetics
- Gene Expression Regulation, Enzymologic
- Leishmania donovani/enzymology
- Leishmania donovani/genetics
- Molecular Sequence Data
- N-Glycosyl Hydrolases/genetics
- N-Glycosyl Hydrolases/metabolism
- Purines/metabolism
- RNA, Messenger/genetics
- RNA, Messenger/metabolism
- Recombinant Proteins/genetics
- Recombinant Proteins/metabolism
- Sequence Alignment
- Sequence Analysis, DNA
- Sequence Homology, Amino Acid
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Cui L, Rzomp KA, Fan Q, Martin SK, Williams J. Plasmodium falciparum: differential display analysis of gene expression during gametocytogenesis. Exp Parasitol 2001; 99:244-54. [PMID: 11888252 DOI: 10.1006/expr.2001.4669] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
With the Plasmodium falciparum genome sequencing near completion, functional analysis of individual parasite genes has become the major task of the postgenomic era. Understanding the expression patterns of individual genes is the initial step toward this goal. In this report, we have examined gene expression during gametocytogenesis of the malaria parasite, P. falciparum, using a modified differential display (DD) method. The modifications of this method include adjusting the dNTP mix, using upstream primers with higher AT contents, and reducing the extension temperature of the polymerase chain reaction (PCR). With a combination of 16 arbitrary upstream primers and 3 one-base-anchored oligo(dT) primers, we have successfully cloned 80 unique cDNA tags from stage IV-V gametocytes. Further analysis by dot blots and semiquantitative reverse transcriptase-PCR showed that at least 49 cDNAs had induced or elevated levels of expression in gametocytes. These results indicate that this modified DD procedure is suitable for large-scale identification of developmentally regulated genes in the AT-rich Plasmodium genome.
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247
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Gong Y, Zhang M, Cui L, Minuk GY. Sequence and chromosomal assignment of a human novel cDNA: similarity to gamma-aminobutyric acid transporter. Can J Physiol Pharmacol 2001; 79:977-84. [PMID: 11824941] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
Gamma-aminobutyric acid (GABA) is the predominant inhibitory neurotransmitter in the mammalian brain. Although initially thought to be confined to the central nervous system, GABAergic activity has also been described in other tissues throughout the body. In the present study, we report the cloning and localization of human GABA transporter cDNA and document its expression in various human tissues. A human liver cDNA library was initially screened by a 32P-labeled murine brain GABA transporter 3 (GAT-3) cDNA probe, and full-length cDNA was cloned by employing Marathon-Ready human kidney cDNA. The human GABA transporter cDNA encoded a 569 amino acid hydrophobic protein with 12 transmembrane domains (TMs). Search of published sequences revealed high homology with rat GAT-2, murine GAT-3 cDNA, human solute carrier family 6 member 13 (SLC6A13), and a human peripheral betaine/GABA transporter. Northern blot analyses demonstrated that the human GABA transporter is expressed strongly in the kidney and to a lesser extent in the liver and brain. The sequence was well matched with human chromosome 12p13.3, suggesting the human GABA transporter contains 14 exons. The above findings confirm the existence of and further characterize a specific GABA transporter in human tissues.
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Shang Q, Wang Z, Liu W, Shi Y, Cui L, Cao Y. Tissue-engineered bone repair of sheep cranial defects with autologous bone marrow stromal cells. J Craniofac Surg 2001; 12:586-93; discussion 594-5. [PMID: 11711828 DOI: 10.1097/00001665-200111000-00017] [Citation(s) in RCA: 192] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
Cranial bone defect remains a major challenge to craniofacial surgeons because of limited availability of autologous bone graft to repair the defects and the donor site defects secondary to tissue harvesting. In contrast, tissue-engineering technique can generate a large bone tissue using small amount of autologous cells and therefore avoid these problems. Bone Marrow Stromal Cells (MSCs) have the potential of multi-lineage (including osteogenic) differentiation. The objective of this study was to investigate the potential of using autologous MSCs to repair cranial bone defects by a tissue-engineering approach. Autologous MSCs were isolated from eight adult sheep respectively and were in vitro expanded and induced to become osteogenic cells. Bilateral full-thickness defects (20 mm in diameter) of parietal bones were created in animals and the bone defects were either repaired with the bone implants constituted with MSCs and calcium alginate at the experimental side (n = 8) or treated with calcium alginate only without MSCs (n = 4) or left unrepaired (n = 4) at the control side. New bone tissues were observed either grossly or histologically at the defects of experimental group as early as 6 weeks post-repairing, but not in control groups. The engineered bone tissue became more mature at 18 weeks post-repairing. Three-dimensional computerized tomography (CT) scan revealed an almost complete repair of the defect of experimental group at 18 weeks. This study may provide insight for future clinical repair of cranial defect.
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Cui L. [A sketch of the hygiene and antiepidemic work of Yanbian Chaoxian minority autonomous prefecture]. ZHONGHUA YI SHI ZA ZHI (BEIJING, CHINA : 1980) 2001; 16:38-43. [PMID: 11612039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
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Abstract
A linear travelling wave dielectrophoretic (twDEP) microchip was fabricated and used to investigate both the levitation and the twDEP motion of latex beads as a function of applied potential and frequency, suspending medium conductivity, bead size, and surface characteristics. The surface conductance of the latex beads was characterised by measurement of the dielectrophoretic (DEP) crossover frequency. Collection of sample prior to initiation of twDEP was achieved using positive DEP forces generated by an integrated pair of parallel electrodes positioned in front of the twDEP array within the microfluidic channel. The principle of linear twDEP separation is shown using latex beads and rabbit heart cells.
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