576
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Zhu X, Thongphiew D, McMahon R, Li T, Chankong V, Yin F, Wu Q. SU-EE-A1-03: Arc Modulated Radiation Therapy Based on Linear Models. Med Phys 2010. [DOI: 10.1118/1.3468008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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577
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Zhuang T, Wu Q. TU-B-BRA-01: Total Body Irradiation (TBI): Looking from Differrent Angles. Med Phys 2010. [DOI: 10.1118/1.3469185] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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578
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Yoo S, O'Daniel J, Horton J, Wu Q, Yin F. SU-GG-T-583: Dosimetric Comparison of Anisotropic Analytical and Pencil Beam Convolution Algorithms in Breast Cancer Radiation Treatment Planning. Med Phys 2010. [DOI: 10.1118/1.3468984] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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579
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Yoo S, Das S, Wu Q, Brizel D, Yin F. SU-GG-T-136: Treatment Plans Comparison with Static-Gantry IMRT and RapidArcTM for Head-And-Neck Cancers Involving Cervical Lymph Nodes. Med Phys 2010. [DOI: 10.1118/1.3468526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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580
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Li T, Thongphiew D, Zhu X, Yin F, Wu Q. WE-B-BRA-03: Adaptive Image-Guided Radiation Therapy (AIGRT) for Hypo-Fractionated Prostate Cancer Treatment. Med Phys 2010. [DOI: 10.1118/1.3469343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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581
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Wu Q, Baek SY, Fang M, Chang YS. Distribution and fate of polybrominated diphenyl ethers in indoor environments of elementary schools. INDOOR AIR 2010; 20:263-70. [PMID: 20573126 DOI: 10.1111/j.1600-0668.2010.00652.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
UNLABELLED Polybrominated diphenyl ethers (PBDEs) are considered harmful to human health because of their toxicities and persistence in environments. In the current study, the distribution and fate of PBDEs in classrooms and computer rooms in 17 elementary schools in South Korea have been described. Eight congeners (brominated diphenyl ether-28, -47, -99, -100, -153, -154, -183, and -209) in air, floor dust, and product surface dust were measured. While Sigma(8)PBDEs in the air in classrooms showed considerable variations (0.659-1600 pg/m(3), arithmetic mean +/- s.d.: 377 +/- 441 pg/m(3)), those in computer rooms were somewhat similar (134-220 pg/m(3), arithmetic mean +/- s.d.: 169 +/- 40 pg/m(3)). Sigma(8)PBDEs in floor dust varied over a wide range, from 453 to 45,700 ng/g, for all rooms. Based on congener patterns, two groups were created--CL-1 that is dominated by high-brominated congeners and CL-2 primarily comprising low-brominated congeners--for both air and floor dust of classrooms. Surface dust had low concentrations, ranged from ND to 181, from ND to 128, and from ND to 256 pg/cm(2) for desk/chair sets, lockers, and playing tools, respectively. Pearson correlation coefficients were calculated individually for air, floor dust, and surface dust. The results indicate that both surface dust and floor dust may act as a secondary source of PBDEs in indoor environments after emission from facilities. PRACTICAL IMPLICATIONS Children have been estimated to have a higher potential exposure to PBDEs than adults. Since children spend most of their day time at school, PBDE distributions in school environments should be a matter of great concern.
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582
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Wu Q, Yin F, McMahon R, Zhu X, Das S. SU-GG-T-137: Similarities between Static and Rotational Intensity Modulated Plans. Med Phys 2010. [DOI: 10.1118/1.3468527] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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583
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Zhao Y, Wang J, Chen X, Wu Q. Significance of mutation in the D-loop region in cervical cancer. W INDIAN MED J 2010; 59:291-294. [PMID: 21291109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
AIM To investigate the mutation in the D-loop region of mitochondrial DNA in cervical cancer and its influence on the changes of reactive oxygen species (ROS) and cell cycle. METHODS The D-loop region was amplified by PCR and sequenced. Reactive oxygen species and cell cycle were detected by flow cytometry in 40 specimens from cervical cancer and adjacent normal tissues. According to the sequence results, gastric cancer tissue was divided into mutation group and control group. Reactive oxygen species, apoptosis and proliferation in the two groups were compared. RESULTS Among the 40 cervical cancer specimens, 21 mutations were identified in 12 patients, the mutation rate being 30%. There were four microsatellite instabilities in the mutations. No mutation was found in the adjacent tissues. Reactive oxygen species, apoptosis and proliferation in the mutation group were all significantly higher than those in the control group. CONCLUSION Mutation in the D-loop region plays a role in the genesis and development of cervical cancer.
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584
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Wu Q, Sahasrabudhe RM, Luo LZ, Lewis DW, Gollin SM, Saunders WS. Deficiency in myosin light-chain phosphorylation causes cytokinesis failure and multipolarity in cancer cells. Oncogene 2010; 29:4183-93. [PMID: 20498637 PMCID: PMC2911497 DOI: 10.1038/onc.2010.165] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Cancer cells often have unstable genomes and increased centrosome and chromosome numbers, which are an important part of malignant transformation in the most recent model of tumorigenesis. However, very little is known about divisional failures in cancer cells that may lead to chromosomal and centrosomal amplifications. In this study, we show that cancer cells often failed at cytokinesis because of decreased phosphorylation of the myosin regulatory light chain (MLC), a key regulatory component of cortical contraction during division. Reduced MLC phosphorylation was associated with high expression of myosin phosphatase and/or reduced myosin light-chain kinase levels. Furthermore, expression of phosphomimetic MLC largely prevented cytokinesis failure in the tested cancer cells. When myosin light-chain phosphorylation was restored to normal levels by phosphatase knockdown, multinucleation and multipolar mitosis were markedly reduced, resulting in enhanced genome stabilization. Furthermore, both overexpression of myosin phosphatase or inhibition of the myosin light-chain kinase in nonmalignant cells could recapitulate some of the mitotic defects of cancer cells, including multinucleation and multipolar spindles, indicating that these changes are sufficient to reproduce the cytokinesis failures we see in cancer cells. These results for the first time define the molecular defects leading to divisional failure in cancer cells.
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585
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Wang SK, Chu CJ, Shan DS, Sun PS, Wu Q. Yields from blood cultures of patients with suspected paratyphoid fever A. Braz J Microbiol 2010; 41:283-5. [PMID: 24031492 PMCID: PMC3768684 DOI: 10.1590/s1517-83822010000200003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2008] [Revised: 05/06/2008] [Accepted: 11/07/2009] [Indexed: 11/22/2022] Open
Abstract
The yield and speed of detection of Salmonella enterica serotype Paratyphi A from the blood of patients with suspected paratyphoid fever A in 13 500 paired aerobic and anaerobic bottles (AEB, ANB) that were each filled with 5 ml of blood by the BacT/ALERT 3D system were compared, and the blood bacterial counts of 1 000 probable patients were estimated by pour plate method. A total of 4 060 isolates were recovered, of these, 3 149 were recovered from both AEB and ANB, 461 from the AEB only, and 450 from the ANB only. The estimating median bacterial count in blood from 400 patients was 0.5 CFU/ml. The research findings demonstrate that the blood volume drawn is an important factor determining the yields from blood cultures. Growth of significantly more isolates was detected earlier in AEB.
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586
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Yu B, Shao Y, Zhang J, Dong X, Liu W, Yang H, Liu L, Li M, Yue C, Fang Z, Zhang C, Hu X, Chen B, Wu Q, Chen Y, Zhang W, Wan J. Polymorphisms in human histamine receptor H4 gene are associated with atopic dermatitis. Br J Dermatol 2010; 162:1038-43. [DOI: 10.1111/j.1365-2133.2010.09675.x] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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587
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Yang Z, Wu Q, Wu K, Fan D. Meta-analysis: pre-operative infliximab treatment and short-term post-operative complications in patients with ulcerative colitis. Aliment Pharmacol Ther 2010; 31:486-92. [PMID: 19925496 DOI: 10.1111/j.1365-2036.2009.04204.x] [Citation(s) in RCA: 105] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
BACKGROUND Infliximab was approved for use in ulcerative colitis in recent years. It has been debated if infliximab increases the risk of post-operative complications in patients with ulcerative colitis. AIM To perform a meta-analysis that examines the relationship between preoperative infliximab treatment and short-term post-operative complications in patients with ulcerative colitis. METHODS We searched the PubMed and MEDLINE databases to identify observational studies on the impact of pre-operative infliximab use on short-term post-operative complications in ulcerative colitis. Infectious complications mainly included wound infection, sepsis and abscess, whereas non-infectious complications included intestinal obstruction, thromboembolism and gastrointestinal haemorrhage. Pooled odds ratios (ORs) were calculated for each relationship. RESULTS A total of 5 studies and 706 patients were included in our meta-analysis. Overall, we did not find a strong association between pre-operative treatment of infliximab and short-term infectious [OR 2.24, 95% confidence interval (CI) 0.63-7.95] or non-infectious (OR 0.85, 95% CI 0.50-1.45) post-operative complications in ulcerative colitis patients. On the contrary, we discovered that pre-operative infliximab use increased short-term total post-operative complications (OR 1.80, 95% CI 1.12-2.87). CONCLUSIONS Pre-operative infliximab use increased the risk of short-term post-operative complications. Subgroup analysis is underpowered to assess the nature of these complications but shows a trend towards increased post-operative infection.
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588
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Wang Q, Gong Q, Wu Q, Shi J. Neuroprotective effects of Dendrobium alkaloids on rat cortical neurons injured by oxygen-glucose deprivation and reperfusion. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2010. [PMID: 19577451 DOI: 10.1016/j.phymed.2009.05.010/1618-095x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
In this study we investigated the protective effects of alkaloids from Dendrobium spez. on cortical neurons injured by oxygen-glucose deprivation/reperfusion (OGD/RP) in vitro. Rat primary cultured cerebral cortical neurons were investigated at different time points of OGD/RP. The MTT assay and the lactate dehydrogenase (LDH) release were used to determine cell viability. The concentration of intracellular free calcium [Ca(2+)](i) and mitochondrial membrane potential (MMP) were determined to evaluate the degree of neuron damage. Morphologic changes of neurons following OGD/RP were examined by electron microscope. To evaluate neuron apoptosis, flow cytometry was performed and the expressions of caspase-3 and caspase-12 mRNA were examined by real-time quantitative PCR during OGD 2h/RP 12h. Treatment with Dendrobium alkaloids (0.025 approximately 2.5mg/l) significantly attenuated neuronal damage, with evidence of increased cell viability, decreased cell apoptosis, and decreased cell morphologic impairment. Furthermore, Dendrobium alkaloids inhibited [Ca(2+)](i) elevation, increased MMP and decreased the expressions of caspase-3 and caspase-12 in a concentration-dependent manner at OGD 2h/RP 12h. Dendrobium alkaloids have significantly protective effects on OGD/RP-induced neuronal damages in rat primary neuron cultures. The protection against OGD/RP-induced apoptosis appears to be mediated through blocking the decrease in MMP and increase in [Ca(2+)](i), as well as by down-regulating mRNA expression of caspase-3 and caspase-12.
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589
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Wang Q, Gong Q, Wu Q, Shi J. Neuroprotective effects of Dendrobium alkaloids on rat cortical neurons injured by oxygen-glucose deprivation and reperfusion. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2010; 17:108-115. [PMID: 19577451 DOI: 10.1016/j.phymed.2009.05.010] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2008] [Revised: 04/08/2009] [Accepted: 05/19/2009] [Indexed: 05/26/2023]
Abstract
In this study we investigated the protective effects of alkaloids from Dendrobium spez. on cortical neurons injured by oxygen-glucose deprivation/reperfusion (OGD/RP) in vitro. Rat primary cultured cerebral cortical neurons were investigated at different time points of OGD/RP. The MTT assay and the lactate dehydrogenase (LDH) release were used to determine cell viability. The concentration of intracellular free calcium [Ca(2+)](i) and mitochondrial membrane potential (MMP) were determined to evaluate the degree of neuron damage. Morphologic changes of neurons following OGD/RP were examined by electron microscope. To evaluate neuron apoptosis, flow cytometry was performed and the expressions of caspase-3 and caspase-12 mRNA were examined by real-time quantitative PCR during OGD 2h/RP 12h. Treatment with Dendrobium alkaloids (0.025 approximately 2.5mg/l) significantly attenuated neuronal damage, with evidence of increased cell viability, decreased cell apoptosis, and decreased cell morphologic impairment. Furthermore, Dendrobium alkaloids inhibited [Ca(2+)](i) elevation, increased MMP and decreased the expressions of caspase-3 and caspase-12 in a concentration-dependent manner at OGD 2h/RP 12h. Dendrobium alkaloids have significantly protective effects on OGD/RP-induced neuronal damages in rat primary neuron cultures. The protection against OGD/RP-induced apoptosis appears to be mediated through blocking the decrease in MMP and increase in [Ca(2+)](i), as well as by down-regulating mRNA expression of caspase-3 and caspase-12.
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590
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Wu Q, Liu GT, Wang LR, Wu YF, Wang XL. A model of expanding HIV/AIDS education in Chinese rural areas. Int J STD AIDS 2010; 21:87-92. [DOI: 10.1258/ijsa.2009.008508] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The aim of the present study is to explore an effective model of HIV/AIDS health education for a rural Chinese population. Students in two middle schools were given HIV/AIDS health education. The education in Tiechang town was carried out in the form of delivering multimedia lectures, video tapes and brochures, while in Daping town brochures were distributed to students. After receiving health education, each student extended the health education to three peasants who were their relatives or neighbours. After the education was provided, the test scores of AIDS knowledge increased significantly in the students of Tiechang town (0.50 baseline, 0.69 post-test1, 0.68 post-test2). For the expansion subjects, the scores increased significantly (0.56 baseline versus 0.74 post-test) in the Tiechang group, and also increased mildly (0.52 baseline versus 0.59 post-test) in the Daping group. Empowering secondary school students to teach others about AIDS was a highly effective model for spreading AIDS prevention knowledge among the rural Chinese population.
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591
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Ke Jin I, Wu Q, Li X, Geng H, Cai L, Zhou X, Jing F. The P-V-Tequation of state of Au and Pt: An alternative pressure scale in high P-Texperiments. EPJ WEB OF CONFERENCES 2010. [DOI: 10.1051/epjconf/20101000033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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592
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Oberheide J, Forbes JM, Häusler K, Wu Q, Bruinsma SL. Tropospheric tides from 80 to 400 km: Propagation, interannual variability, and solar cycle effects. ACTA ACUST UNITED AC 2009. [DOI: 10.1029/2009jd012388] [Citation(s) in RCA: 163] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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593
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Liu H, Wu Q, Zhang Q. Preparation and properties of banana fiber-reinforced composites based on high density polyethylene (HDPE)/Nylon-6 blends. BIORESOURCE TECHNOLOGY 2009; 100:6088-97. [PMID: 19574041 DOI: 10.1016/j.biortech.2009.05.076] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2008] [Revised: 01/09/2009] [Accepted: 05/30/2009] [Indexed: 05/15/2023]
Abstract
Banana fiber (BaF)-filled composites based on high density polyethylene (HDPE)/Nylon-6 blends were prepared via a two-step extrusion method. Maleic anhydride grafted styrene/ethylene-butylene/styrene triblock polymer (SEBS-g-MA) and maleic anhydride grafted polyethylene (PE-g-MA) were used to enhance impact performance and interfacial bonding between BaF and the resins. Mechanical, crystallization/melting, thermal stability, water absorption, and morphological properties of the composites were investigated. In the presence of SEBS-g-MA, better strengths and moduli were found for HDPE/Nylon-6 based composites compared with corresponding HDPE based composites. At a fixed weight ratio of PE-g-MA to BaF, an increase of BaF loading up to 48.2 wt.% led to a continuous improvement in moduli and flexural strength of final composites, while impact toughness was lowered gradually. Predicted tensile modulus by the Hones-Paul model for three-dimensional random fiber orientation agreed well with experimental data at the BaF loading of 29.3 wt.%. However, the randomly-oriented fiber models underestimated experimental data at higher fiber levels. It was found that the presence of SEBS-g-MA had a positive influence on reinforcing effect of the Nylon-6 component in the composites. Thermal analysis results showed that fractionated crystallization of the Nylon-6 component in the composites was induced by the addition of both SEBS-g-MA and PE-g-MA. Thermal stability of both composite systems differed slightly, except an additional decomposition peak related to the minor Nylon-6 for the composites from the HDPE/Nylon-6 blends. In the presence of SEBS-g-MA, the addition of Nylon-6 and increased BaF loading level led to an increase in the water absorption value of the composites.
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594
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Sun J, Zhou M, Wu Q, Ni Y. Characterization of two novel gene cassettes, dfrA27 and aadA16, in a non-O1, non-O139 Vibrio cholerae isolate from China. Clin Microbiol Infect 2009; 16:1125-9. [PMID: 19906273 DOI: 10.1111/j.1469-0691.2009.03060.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
Two novel integron-borne cassettes, dfrA27 (encoding trimethoprim resistance) and aadA16 (encoding streptomycin and spectinomycin resistance), located on a conjugative plasmid, have been found in a non-O1, non-O139 Vibrio cholera isolate. DfrA27 shares 75% amino acid identity with DfrA5, and AadA16 shares 88% identity with AdaA6. Cloning of the cassette region and expression analysis demonstrated that the aadA16 gene can be expressed from its own promoter sequence, which is present upstream of the aadA16 cassette.
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595
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Adamson J, Wu Q, Yan D. Adaptive Management of Intrafraction Motion in Online Image Guided Prostate Cancer Radiotherapy. Int J Radiat Oncol Biol Phys 2009. [DOI: 10.1016/j.ijrobp.2009.07.1436] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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596
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Thongphiew D, Zhu X, Wu Q, Lee W, Wu Q, Chankong V, Yin F. Hybrid IGRT Technique for Prostate Hypofractionation. Int J Radiat Oncol Biol Phys 2009. [DOI: 10.1016/j.ijrobp.2009.07.1479] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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597
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Wang X, Fujita M, Prado R, Tousson A, Hsu HC, Schottelius A, Kelly DR, Yang PA, Wu Q, Chen J, Xu H, Elmets CA, Mountz JD, Edwards CK. Visualizing CD4 T-cell migration into inflamed skin and its inhibition by CCR4/CCR10 blockades using in vivo imaging model. Br J Dermatol 2009; 162:487-96. [PMID: 19832835 DOI: 10.1111/j.1365-2133.2009.09552.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
BACKGROUND Chemokines are critical mediators of T-cell homing into inflamed skin. The complex nature of this multicellular response makes it difficult to analyse mechanisms mediating the early responses in vivo. OBJECTIVES To visualize directly T-cell homing into inflamed skin and its inhibition by blockades using a unique noninvasive confocal microscopy. MATERIALS AND METHODS A mouse model of allergic contact dermatitis was used. T cells from oxazolone-sensitized and -challenged Balb/c mice were first analysed phenotypically in vitro. CD4 T cells were then labelled with a tracker dye and transferred into Balb/c-SCID mice. The recipient mice were challenged with oxazolone and CD4 T-cell homing into inflamed skin was visualized. RESULTS T cells with the skin homing receptors CCR4 and CCR10 were increased in the affected skin and draining lymph nodes, and effectively attracted by their specific chemokines CCL17, CCL22 and CCL27 in vitro. Using in vivo imaging, T-cell migration into the inflamed skin was observed at 2 h after application, peaking at 12 h and continuing for 48 h. Simultaneous systemic administration of neutralizing antibodies against CCR4 ligands (CCL17 and CCL22) and CCR10 ligand (CCL27) led to a significant suppression of T-cell migration and skin inflammation. CONCLUSIONS Our data indicate that these tissue-selective adhesion molecules and chemokine/receptor pathways act in concert to attract specialized T-cell populations to mediate cutaneous inflammation. The in vivo imaging technique can be applicable to other models of cutaneous diseases to help with better understanding of the pathogenesis and monitoring the therapeutic effects.
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598
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Wu Q, Luo L, Yue T, Zhang R, Teng Y. P644 Using extracoporeal magnetic innervation (ExMI) for early postnatal women. Int J Gynaecol Obstet 2009. [DOI: 10.1016/s0020-7292(09)62135-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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599
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Vingtdeux V, Zhao H, Chandakkar P, Wu Q, Simon J, Janle E, Lobo J, Ferruzzi M, Davies P, Marambaud P. C1 Régulation des taux cérébraux de peptide Aß par l’AMP kinase. Rev Neurol (Paris) 2009. [DOI: 10.1016/s0035-3787(09)72554-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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600
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Xu X, Hsu HC, Chen J, Grizzle WE, Chatham WW, Stockard CR, Wu Q, Yang PA, Holers VM, Mountz JD. Increased expression of activation-induced cytidine deaminase is associated with anti-CCP and rheumatoid factor in rheumatoid arthritis. Scand J Immunol 2009; 70:309-16. [PMID: 19703021 DOI: 10.1111/j.1365-3083.2009.02302.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Rheumatoid arthritis (RA) is associated with higher levels of autoantibodies and IL-17. Here, we investigated if ectopic lymphoid follicles and peripheral blood mononuclear cells (PBMCs) from RA patients exhibit increased activation-induced cytidine deaminase (AID), and if increased AID is correlated with serum levels of autoantibodies and IL-17. The results of immunohistochemical staining showed that organized AID(+) germinal centres were observed in six of the 12 RA synovial samples, and AID(+) cells were found almost exclusively in the B-cell areas of these follicles. Aggregated but not organized lymphoid follicles were found in only one OA synovial sample without AID(+) cells. Significantly higher levels of AID mRNA (Aicda) detected by RT-PCR were found in the PBMCs from RA patients than PBMCs from normal controls (P < 0.01). In the PBMCs from RA patients, AID was expressed predominately by the CD10(+)IgM(+)CD20(+) B-cell population and the percentage of these cells that expressed AID was significantly higher than in normal controls (P < 0.01). AID expression in the PBMCs correlated significantly and positively with the serum levels of rheumatoid factor (RF) (P </= 0.0001) and anti-cyclic citrullinated peptide (CCP) (P = 0.0005). Serum levels of IFN-gamma (P = 0.0005) and IL-17 (P = 0.007), but not IL-4, also exhibited positive correlation with the expression of AID. These results suggest that the higher levels of AID expression in B cells of RA patients correlate with, and may be associated with the higher levels of T helper cell cytokines IFN-gamma and IL-17, leading to the development of anti-CCP and RF.
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