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Xie Z, Zhang M, Xiong W, Wan HY, Zhao XC, Xie T, Lei H, Lin ZC, Luo DS, Liang XL, Chen YH. Immunotolerant indoleamine-2,3-dioxygenase is increased in condyloma acuminata. Br J Dermatol 2017; 177:809-817. [PMID: 28132413 DOI: 10.1111/bjd.15356] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/22/2017] [Indexed: 01/06/2023]
Abstract
BACKGROUND The tryptophan-depleting enzyme indoleamine-2,3-dioxygenase (IDO) is critical for the regulation of immunotolerance and plays an important role in immune-associated skin diseases. OBJECTIVES To analyse the level of IDO in condyloma acuminata (CA) and its role in this condition. METHODS IDO expression was assessed in the skin and peripheral blood of healthy controls and patients with CA. To assess the role of skin IDO in immunity, the ability of isolated epidermal cells to metabolize tryptophan and the influence on polyclonal T-cell mitogen (PHA)-stimulated T-cell proliferation were explored. RESULTS IDO median fluorescence intensities in peripheral blood mononuclear cells from patients with CA were similar to those from healthy controls. Immunohistochemistry showed that IDO+ cells were rare in normal skin and the control skin of patients with CA, but were greatly accumulated in wart tissue. Most fluorescence signals of IDO+ cells did not overlap with those of CD1a+ Langerhans cells. Human papillomavirus (HPV) DNA probe in situ hybridization showed a large number of IDO+ cells in the HPV- site. Keratinocytes in the skin of healthy controls and the circumcised skin of patients with CA could minimally transform tryptophan into kynurenine, but IDO-competent epidermal cells from warts could transform tryptophan. In addition, these IDO-competent epidermal cells could inhibit PHA-stimulated T-cell proliferation. The addition of an IDO inhibitor, 1-methyl-d-tryptophan, restored the inhibited T-cell proliferation. CONCLUSIONS Abnormally localized high IDO expression might be involved in the formation of a local immunotolerant microenvironment.
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Affiliation(s)
- Z Xie
- Department of Dermatology, Sichuan Academy of Medical Science & Sichuan Provincial People's Hospital, Chengdu, China
| | - M Zhang
- Department of Gastroenterology, the Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - W Xiong
- Division of Urology and Transplantation, Department of Surgery, Sichuan Academy of Medical Science & Sichuan Provincial People's Hospital, Chengdu, China
| | - H Y Wan
- Department of Dermatology, Sichuan Academy of Medical Science & Sichuan Provincial People's Hospital, Chengdu, China
| | - X C Zhao
- Division of Nephrology, Guangdong General Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China.,Nanfang Medical University, Guangzhou, China
| | - T Xie
- Department of Dermatology, Guangdong Provincial Hospital of Chinese Hospital, Guangzhou, China
| | - H Lei
- Department of Dermatology, Sichuan Academy of Medical Science & Sichuan Provincial People's Hospital, Chengdu, China
| | - Z C Lin
- Department of Dermatology, Sichuan Academy of Medical Science & Sichuan Provincial People's Hospital, Chengdu, China
| | - D S Luo
- Department of Dermatology, Sichuan Academy of Medical Science & Sichuan Provincial People's Hospital, Chengdu, China
| | - X L Liang
- Division of Nephrology, Guangdong General Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Y H Chen
- Division of Nephrology, Guangdong General Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
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Jin C, Cheng L, Höxtermann S, Xie T, Lu X, Wu H, Skaletz-Rorowski A, Brockmeyer NH, Wu N. MicroRNA-155 is a biomarker of T-cell activation and immune dysfunction in HIV-1-infected patients. HIV Med 2016; 18:354-362. [PMID: 27981723 DOI: 10.1111/hiv.12470] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/14/2016] [Indexed: 01/07/2023]
Abstract
OBJECTIVES MicroRNA-155 (miR-155) regulates T-cell differentiation and activation. It has also been associated with HIV infection. However, it remains unclear whether miR-155 is related to the T-cell response in HIV-infected individuals (e.g. T-cell activation and exhaustion). METHODS We performed a cross-sectional study involving 121 HIV-1-infected patients on highly active antiretroviral therapy (HAART) and 43 HAART-naïve patients. MiR-155 levels in the peripheral blood were determined by quantitative reverse transcription-polymerase chain reaction (PCR). T-cell immune activation, exhaustion, and homeostasis were measured by determining the expression of CD38, programmed death 1 (PD-1) and CD127 via flow cytometry. RESULTS The levels of miR-155 in total peripheral blood mononuclear cells, CD4 T cells and CD8 T cells from HIV-1-infected patients were increased (P < 0.01). Nonresponders and HAART-naïve patients also exhibited a higher percentage of CD8+ CD38+ T cells and a lower percentage of CD4+ CD127+ and CD8+ CD127+ T cells (P < 0.05). We also found higher levels of PD-1 expression on the CD4+ and CD8+ T cells of HIV-1-infected patients (P < 0.05). CONCLUSIONS Our findings suggest that miR-155 levels in the peripheral blood of HIV-1-infected patients are increased and associated with T-cell activation. Therefore, miR-155 is a potential biomarker of the immune response following HIV-1 infection.
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Affiliation(s)
- C Jin
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - L Cheng
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - S Höxtermann
- Department of Dermatology, Venerology and Allergology, Center for Sexual Health and Medicine, St. Josef Hospital, Ruhr University Bochum, Bochum, Germany
| | - T Xie
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - X Lu
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - H Wu
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - A Skaletz-Rorowski
- Department of Dermatology, Venerology and Allergology, Center for Sexual Health and Medicine, St. Josef Hospital, Ruhr University Bochum, Bochum, Germany.,Competence Network for HIV/AIDS, Ruhr University Bochum, Bochum, Germany
| | - N H Brockmeyer
- Department of Dermatology, Venerology and Allergology, Center for Sexual Health and Medicine, St. Josef Hospital, Ruhr University Bochum, Bochum, Germany.,Competence Network for HIV/AIDS, Ruhr University Bochum, Bochum, Germany
| | - N Wu
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
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53
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Lu Y, Wang WP, Wang XX, Feng JJ, Guo ZP, Liu LM, Xie T, Zhao RR, Cai YL. [Effects of prenatal maternal seizure on hippocampal damage and cognitive deficits in offspring rats]. Zhonghua Er Ke Za Zhi 2016; 54:746-751. [PMID: 27784476 DOI: 10.3760/cma.j.issn.0578-1310.2016.10.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To observe hippocampal damage and cognitive impairment of offspring exposed to prenatal maternal seizure induced by amygdala kindling, and to explore the underlying mechanism by the detection of pathological changes of placenta. Method: Adult female SD rats were randomly divided into three groups: control group(8 rats), kindling group(12 rats) and sham group(8 rats). All the rats were allowed to mate after one week's fully kindling. The pregnant rats in kindling group received electric stimulation every 48 h. Dams were allowed to deliver naturally. Effects of maternal seizure on the number of offspring, the survival rate and body weight of pups were observed. HE staining was used to visualize histopathological changes of placenta. Morris water maze test was used to assess the cognitive function and Nissal's staining to detect hippocampal morphology of the offspring. One-way ANOVA analysis and χ2 test were used. Result: Compared with the sham group (95%(78/82)) and the control group (95%(82/86)), the survival rate of pups in kindling group(81%(66/82))was much lower (χ2=13.817, P=0.001). There were no significant differences in the number of pups per litter and pups birth-weight between kindling group and sham group or control group(F=0.312 and 0.257, P=0.736 and 0.776). HE staining showed that placental tissues from control and sham groups were normal whereas the histologic abnormalities of placentas from kindling group were characterized by thickening of the villus vascular walls, luminal stenosis, trophoblasts hyperplasia, abnormalities of trophoblasts with nuclear pyknosis and karyorrhexis and accumulation of inflammatory lymphocytes in labyrinthine zone. Nissl staining showed that neurons in hippocampus of P0(0 d after birth) and P84(84 d after birth) offspring from control and sham groups were normal, but neuronal damages were obvious in hippocampus of P0 and P84 offspring from kindling groups, and the damages in P0 pups were severe with a marked loss of neuron, shrinkage of cells and nuclear pyknosis and karyorrhexis. In the Morris water maze, compared with the sham group ((29±8), (19±9), (10±4)s) and the control group ((25±6), (17±5), (14±4)s) rats in the kindling group ((36±8), (29±8), (30±11)s) exhibited significantly longer escape latency from the 3rd, 4th, and 5th days (F=6.276, 7.518, 18.422, P=0.030, 0.003, 0.000), significant less time in the target quadrant ((27±8) vs.(58±11)and(68±13)s, F=35.993, P=0.000) and reduced number of crossing the platform ((4.4±1.7) vs. (7.2±1.6) and (8.5±1.3)times, F=18.377, P=0.000). In addition, there was no significant difference between control and sham groups(P all >0.05). Conclusion: The prenatal maternal seizures induced significant pathological damages to hippocampus and cognitive impairment of offspring. Hypoxia-ischemia of placenta might play an important role in this process.
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Affiliation(s)
- Y Lu
- *Department of Pediatrics, the Second Hospital of Hebei Medical University, Shijiazhuang 050000, China
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54
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Li JM, Ren YL, Wang YT, Xie T, Ye Y. [Discussion on the species and naming of medical bamboo slips unearthed from Han tomb in Laoguanshan]. Zhonghua Yi Shi Za Zhi 2016; 46:303-306. [PMID: 28104006 DOI: 10.3760/cma.j.issn.0255-7053.2016.05.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
920 pieces of bamboo slip, including broken bamboo slips, found in Laoguanshan Han tomb, are placed in two locations. In one of the location, 736 pieces, except 20 pieces of " chi jian" , of medical bamboo slips are stored. The Chengdu Municipal Institute of Archaeology and Cultural Relics Protection Center of Jingzhou preliminary sorted out these pieces and tentatively give them the names: Wu se mai zang lun, Bi xi yi lun, Mai si hou, Liu shi bing fang, Bing yuan lun, Zhu bing zheng hou, Jing mai shu, Gui mai shu. Through our comprehensive reading, font comparison, comparison of the contents, and investigation on the texts, it was suggested that the batch of medical slips might be divided into nine kinds of documents, namely, Bi xi zhen fa, Zhen zhi lun, Liu shi bing fang, Zhu bing yi, Zhu bing er, Shi er mai, Bie mai, Ci shu, Ni shun wu se mai zang yan jing shen.
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Affiliation(s)
- J M Li
- Institute of Sinology, Chengdu University of Traditional Chinese Medicine, Chengdu, 610075
| | - Y L Ren
- Institute of Sinology, Chengdu University of Traditional Chinese Medicine, Chengdu, 610075
| | - Y T Wang
- School of Basic Medical Science, Chengdu University of Traditional Chinese Medicine, Chengdu, 610075
| | - T Xie
- Chengdu Municipal Institute of Cultural Relics and Archaeology, Chengdu, 610072, China
| | - Y Ye
- School of Basic Medical Science, Chengdu University of Traditional Chinese Medicine, Chengdu, 610075
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55
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Xie T, Luo G, Zhang Y, Wang X, Wang X, Wu M, Li G. Rho-kinase inhibitor fasudil reduces allergic airway inflammation and mucus hypersecretion by regulating STAT6 and NFκB. Clin Exp Allergy 2016; 45:1812-22. [PMID: 26245530 DOI: 10.1111/cea.12606] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2015] [Revised: 07/07/2015] [Accepted: 07/24/2015] [Indexed: 02/03/2023]
Abstract
BACKGROUND Airway mucus hypersecretion is a key pathophysiological feature in asthma. Fasudil, a selective Rho-A/Rho kinase inhibitor, has been used in clinical trials to treat pulmonary hypertension. However, its function in modulating airway mucus hypersecretion in asthma remains undefined. OBJECTIVE We examined whether fasudil, a selective Rho-A/Rho kinase inhibitor, affects the mucus hypersecretion by suppressing MUC5AC via signal transducer and activator of transcription factor 6 (STAT6) and nuclear factor-kappa B (NFκB) in mice and cells. METHODS We measured mucus secretion and the expression of Rho-kinase in the airway tissue of patients with asthma. BALB/c mice were sensitized and challenged with ovalbumin (OVA) followed with fasudil treatment. The lung tissues were assessed for airway inflammation and mucus secretion. Cytokine levels and airway responsiveness were determined. STAT6 and NFκB were quantified by Western blot. 16HBE cells were stimulated with house dust mite (HDM) extracts. MUC5AC and muc5ac promoter activities were measured. Using siRNA to knockdown STAT6 in epithelial cells, we determined the impact of STAT6 on muc5ac promoter activity. NFκB nuclear translocation was observed with immunostaining. RESULTS Fasudil administration significantly decreased the number of inflammatory cells, inflammation index in the lung and airway responsiveness. Fasudil also reduced mucous secretion and MUC5AC expression in OVA-challenged mice. Fasudil down-regulated the levels of IL-17, IL-4 and IL-13 in the lung tissue of OVA-challenged mice. Fasudil also decreased the expression and phosphorylation of NFκB and STAT6 as well as the nuclear translocation of NFκB. In addition, human airway epithelial cells (16HBE) were challenged with HDM extracts and then treated with fasudil. Fasudil inhibited HDM extract-induced MUC5AC expression, which is associated with a reduction in STAT6 and NFκB in epithelial cells. CONCLUSIONS AND CLINICAL RELEVANCE These findings indicate that the Rho-A/Rho kinase inhibitor, fasudil, plays a negative regulatory role in allergen-induced mucus secretion and MUC5AC expression by regulating STAT6 and NFκB.
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Affiliation(s)
- T Xie
- Inflammations & Allergic Diseases Research Unit, First Affiliated Hospital of Sichuan Medical University, Luzhou, Sichuan, China
| | - Gy Luo
- Staff Health Clinic, Sichuan Medical University, Luzhou, Sichuan, China
| | - Y Zhang
- Inflammations & Allergic Diseases Research Unit, First Affiliated Hospital of Sichuan Medical University, Luzhou, Sichuan, China
| | - X Wang
- Inflammations & Allergic Diseases Research Unit, First Affiliated Hospital of Sichuan Medical University, Luzhou, Sichuan, China
| | - Xy Wang
- Inflammations & Allergic Diseases Research Unit, First Affiliated Hospital of Sichuan Medical University, Luzhou, Sichuan, China
| | - M Wu
- Department of Basic Biomedical Sciences, School of Medicine and Health Sciences, University of North Dakota, Grand Forks, ND, USA
| | - Gp Li
- Inflammations & Allergic Diseases Research Unit, First Affiliated Hospital of Sichuan Medical University, Luzhou, Sichuan, China.,State Key Laboratory of Respiratory Disease for Allergy, School of Medicine, Shenzhen University, Shenzhen, Guangdong, China
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56
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Huang YL, Zheng JP, Xie T. [Type Ⅰ hyperlipoproteinemia caused by lipoprotein lipase gene mutation in three Chinese children]. Zhonghua Er Ke Za Zhi 2016; 54:383-385. [PMID: 27143083 DOI: 10.3760/cma.j.issn.0578-1310.2016.05.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
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57
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Delling M, Indzhykulian AA, Liu X, Li Y, Xie T, Corey DP, Clapham DE. Primary cilia are not calcium-responsive mechanosensors. Nature 2016; 531:656-60. [PMID: 27007841 PMCID: PMC4851444 DOI: 10.1038/nature17426] [Citation(s) in RCA: 248] [Impact Index Per Article: 31.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2015] [Accepted: 02/16/2016] [Indexed: 01/09/2023]
Abstract
Primary cilia are solitary, generally non-motile, hair-like protrusions that extend from the surface of cells between cell divisions. Their antenna-like structure leads naturally to the assumption that they sense the surrounding environment, the most common hypothesis being sensation of mechanical force through calcium-permeable ion channels within the cilium1. This Ca2+- Responsive MechanoSensor (CaRMS) hypothesis for primary cilia has been invoked to explain a large range of biological responses, from control of left-right axis determination in embryonic development to adult progression of polycystic kidney disease and some cancers2,3. Here, we report the complete lack of mechanically induced calcium increases in primary cilia, in tissues upon which this hypothesis has been based. First, we developed a transgenic mouse, Arl13b-mCherry-GECO1.2, expressing a ratiometric genetically encoded calcium indicator (GECI) in all primary cilia. We then measured responses to flow in primary cilia of cultured kidney epithelial cells, kidney thick ascending tubules, crown cells of the embryonic node, kinocilia of inner ear hair cells, and several cell lines. Cilia-specific Ca2+ influxes were not observed in physiological or even highly supraphysiological levels of fluid flow. We conclude that mechanosensation, if it originates in primary cilia, is not via calcium signaling.
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Affiliation(s)
- M Delling
- Department of Cardiology, Howard Hughes Medical Institute, Boston Children's Hospital, Boston, Massachusetts 02115, USA
| | - A A Indzhykulian
- Department of Neurobiology, Howard Hughes Medical Institute, Harvard Medical School, Boston, Massachusetts 02115, USA
| | - X Liu
- Department of Cardiology, Howard Hughes Medical Institute, Boston Children's Hospital, Boston, Massachusetts 02115, USA
| | - Y Li
- Department of Neurobiology, Howard Hughes Medical Institute, Harvard Medical School, Boston, Massachusetts 02115, USA
| | - T Xie
- Image and Data Analysis Core (IDAC), Harvard Medical School, Boston, Massachusetts 02115, USA
| | - D P Corey
- Department of Neurobiology, Howard Hughes Medical Institute, Harvard Medical School, Boston, Massachusetts 02115, USA
| | - D E Clapham
- Department of Cardiology, Howard Hughes Medical Institute, Boston Children's Hospital, Boston, Massachusetts 02115, USA.,Department of Neurobiology, Howard Hughes Medical Institute, Harvard Medical School, Boston, Massachusetts 02115, USA
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Jiang J, Wang Y, Xie T, Shi X, Wang YP, Sokolov V. DNA methylation analysis during the optimization of Agrobacterium-mediated transformation of soybean. RUSS J GENET+ 2016. [DOI: 10.1134/s1022795416010087] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Kang HY, Xiao HL, Chen JH, Tan Y, Chen X, Xie T, Fang JQ, Wang S, Yang Y, Zhang WG. Comparison of the Effect of Vessel Size Imaging and Cerebral Blood Volume Derived from Perfusion MR Imaging on Glioma Grading. AJNR Am J Neuroradiol 2015; 37:51-7. [PMID: 26381565 DOI: 10.3174/ajnr.a4477] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2015] [Accepted: 05/14/2015] [Indexed: 12/30/2022]
Abstract
BACKGROUND AND PURPOSE Vascular proliferation is a major criterion for grading gliomas on the basis of histology. Relative cerebral blood volume can provide pathophysiologic information about glioma grading. Vessel size imaging, in some animals, can be used to estimate the microvascular caliber of a glioma, but its clinical use remains unclear. Herein, we aimed to compare the predictive power of relative cerebral blood volume and vessel size imaging in glioma grading, with grading based on histology. MATERIALS AND METHODS Seventy patients with glioma participated in the study; 30 patients underwent MR perfusion imaging with a spin-echo sequence and vessel size imaging with a gradient-echo and spin-echo sequence successively at 24-hour intervals before surgery. We analyzed the vessel size imaging values and relative cerebral blood volume of differently graded gliomas. The microvessel parameters were histologically evaluated and compared with those on MR imaging. The cutoff values of vessel size imaging and relative cerebral blood volume obtained from receiver operating characteristic curve analyses were used to predict glioma grading in another 40 patients. RESULTS Vessel size imaging values and relative cerebral blood volume were both increased in high-grade gliomas compared with low-grade gliomas (P < .01). Moreover, vessel size imaging values had higher specificity and sensitivity in differentiating high-grade from low-grade gliomas compared with relative cerebral blood volume. In addition, a significant correlation was observed between vessel size imaging values and microvessel diameters (r > 0.8, P < .05) and between relative cerebral blood volume and microvessel area (r = 0.6579, P < .05). Most important, the use of vessel size imaging cutoff values to predict glioma grading was more accurate (100%) than use of relative cerebral blood volume (85%) values. CONCLUSIONS Vessel size imaging can provide more accurate information on glioma grading and may serve as an effective biomarker for the prognosis of patients with gliomas.
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Affiliation(s)
- H-Y Kang
- From Departments of Radiology (H.-Y.K., J.-H.C., H.-L.X., Y.T., X.C., T.X., J.-q.F., W.-G.Z.)
| | - H-L Xiao
- From Departments of Radiology (H.-Y.K., J.-H.C., H.-L.X., Y.T., X.C., T.X., J.-q.F., W.-G.Z.) Pathology (H.-L.X.)
| | - J-H Chen
- From Departments of Radiology (H.-Y.K., J.-H.C., H.-L.X., Y.T., X.C., T.X., J.-q.F., W.-G.Z.)
| | - Y Tan
- From Departments of Radiology (H.-Y.K., J.-H.C., H.-L.X., Y.T., X.C., T.X., J.-q.F., W.-G.Z.)
| | - X Chen
- From Departments of Radiology (H.-Y.K., J.-H.C., H.-L.X., Y.T., X.C., T.X., J.-q.F., W.-G.Z.)
| | - T Xie
- From Departments of Radiology (H.-Y.K., J.-H.C., H.-L.X., Y.T., X.C., T.X., J.-q.F., W.-G.Z.)
| | - J-Q Fang
- From Departments of Radiology (H.-Y.K., J.-H.C., H.-L.X., Y.T., X.C., T.X., J.-q.F., W.-G.Z.)
| | - S Wang
- Departments of Radiology (S.W.)
| | - Y Yang
- Medicine (Y.Y.), Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
| | - W-G Zhang
- From Departments of Radiology (H.-Y.K., J.-H.C., H.-L.X., Y.T., X.C., T.X., J.-q.F., W.-G.Z.) State Key Laboratory of Trauma, Burns and Combined Injury (W.-G.Z.), Institute of Surgery Research, Daping Hospital, Third Military Medical University, Chongqing, China
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Jin C, Peng X, Xie T, Lu X, Liu F, Wu H, Yang Z, Wang J, Cheng L, Wu N. Detection of the long noncoding RNAs nuclear-enriched autosomal transcript 1 (NEAT1) and metastasis associated lung adenocarcinoma transcript 1 in the peripheral blood of HIV-1-infected patients. HIV Med 2015; 17:68-72. [PMID: 26139386 DOI: 10.1111/hiv.12276] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/10/2015] [Indexed: 11/29/2022]
Abstract
OBJECTIVES Long noncoding RNAs (lncRNAs) in HIV-1 infection have not been extensively studied. Here we detected two lncRNAs, nuclear-enriched autosomal transcript 1 (NEAT1) and metastasis associated lung adenocarcinoma transcript 1 (MALAT1), in peripheral blood mononuclear cells (PBMCs) and plasma of HIV-1-infected patients. METHODS Fifty-nine HIV-1-infected patients and 21 healthy controls were recruited for the study, of whom 31 patients were highly active antiretroviral therapy (HAART)-naïve and 28 patients had been receiving HAART for more than 1 year with undetectable viral loads. Total RNA was extracted from PBMCs and plasma, and levels of NEAT1 and MALAT1 were determined by quantitative real-time polymerase chain reaction. RESULTS We found that the levels of NEAT1 and MALAT1 in PBMCs were up-regulated in HAART-naïve patients and were reduced in patients receiving HAART. NEAT1 was down-regulated in the plasma of infected patients and expression was correlated with CD4 T-cell count. CONCLUSIONS Our findings suggest that NEAT1 and MALAT1 may interact with HIV-1 in vivo and that the presence of NEAT1 in plasma is a potential biomarker of HIV-1 infection.
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Affiliation(s)
- C Jin
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China.,Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, China
| | - X Peng
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China.,Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, China
| | - T Xie
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China.,Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, China
| | - X Lu
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China.,Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, China
| | - F Liu
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China.,Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, China
| | - H Wu
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China.,Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, China
| | - Z Yang
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China.,Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, China
| | - J Wang
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China.,Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, China
| | - L Cheng
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China.,Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, China
| | - N Wu
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China.,Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, China
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Abstract
Eukaryotic elongation factor-2 kinase (eEF2K), encoded by the EEF2K gene, is well-known to be a Ca(2+)/calmodulin (CaM)-dependent kinase which can negatively modulate protein synthesis. It is highly conserved among eukaryotes from mammals to invertebrates, of which human and mouse may have 99 % overall amino acid identity. This kinase can phosphorylate eukaryotic elongation factor-2 (eEF2) or undergo the process of autophosphorylation at multiple sites to inhibit its function in translation elongation. Due to the fact that regulation of eEF2 by eEF2K is an evolutionarily conserved mechanism, eEF2K activity may confer tumor cell adaption to metabolic stress under acute nutrient depletion, and the high expressed level of eEF2K has been found in several types of malignancies. eEF2K may modulate the expression of some apoptotic proteins such as XIAP, c-FLIPL, Bcl-XL, PI3KCI and p70(S6K) to inhibit apoptotic process in cancer. On the other hand, it plays a regulatory role in autophagy involved in mTORC1, AMPK and Atg8, thereby promoting cancer cell survival. Additionally, eEF2K may play a crucial role in the crosstalk between apoptosis and autophagy in cancer. Collectively, these findings have led to the conclusions that eEF2K may contribute to carcinogenesis, and thus being utilized as a potential target for future cancer therapy.
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Affiliation(s)
- L L Fu
- State Key Laboratory of Biotherapy & Collaborative Innovation Center of Biotherapy, West China Hospital, Sichuan University, Chengdu, 610041, China
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62
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Abstract
We examined the relationship between type 2 diabetes and skin wound healing. GSE38396 was downloaded from the Gene Expression Omnibus database and preprocessed using the RMA function of the Affy package. Differentially expressed genes (DEGs) were identified using the limma package, then DAVID was applied to per-form Gene Ontology functional annotation and Kyoto Encyclopedia of Genes and Genomes pathway enrichment analysis. MicroRNAs and their target genes were screened from the miRecords database and subjected to functional analysis. Finally, the STRING online database was applied to identify the protein-protein interaction relationships, and a combined score > 0.5 was considered to indicate an interaction. A total of 421 DEGs (208 upregulated and 213 downregulated genes) were identified in the skin lymphatic endothelial cells of patients with type II diabetes. Twenty-four microRNAs and 34 target genes were screened, including those involved in cell migration, regulation of cell proliferation, cell death, and cell adhesion regulation, among others. Protein-protein interaction network clustering analysis identified a module composed of 25 genes, and INTERPRO protein domain enrichment analysis showed that the protein domain of the clustering module main-ly contained the insulin-like growth factor binding proteins IGFBP3 and CYR61. IGFBP3 and CYR61 may play important roles in skin wound healing in diabetes patients. This information may be useful for developing methods to treat skin refractory wounds in type II diabetes.
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Affiliation(s)
- K Ge
- Department of Emergency, Shanghai 9th People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - J J Wu
- Department of Emergency, Shanghai 9th People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - L Qian
- Department of Emergency, Shanghai 9th People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - M J Wu
- Department of Wound Healing, Shanghai 9th People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - F L Wang
- Department of Emergency, Shanghai 9th People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - B Xu
- Department of Emergency, Shanghai 9th People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - T Xie
- Department of Wound Healing, Shanghai 9th People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
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Li HY, Zhang J, Sun LL, Li BH, Gao HL, Xie T, Zhang N, Ye ZM. Celastrol induces apoptosis and autophagy via the ROS/JNK signaling pathway in human osteosarcoma cells: an in vitro and in vivo study. Cell Death Dis 2015; 6:e1604. [PMID: 25611379 PMCID: PMC4669742 DOI: 10.1038/cddis.2014.543] [Citation(s) in RCA: 207] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2014] [Revised: 10/11/2014] [Accepted: 11/13/2014] [Indexed: 12/17/2022]
Abstract
Osteosarcoma is the most common primary malignant tumor of bone, the long-term survival of which has stagnated in the past several decades. Celastrol, a triterpene from traditional Chinese medicine, has been proved to possess potent anti-tumor effect on various cancers. However, the effect of celastrol on human osteosarcoma and the underlying mechanisms remains to be elucidated. We reported here that celastrol could inhibit cell proliferation by causing G2/M phase arrest. Exposure to celastrol resulted in the activation of caspase-3, -8, and -9, indicating that celastrol induced apoptosis through both extrinsic and intrinsic pathways. Autophagy occurred in celastrol-treated cells as evidenced by formation of autophagosome and accumulation of LC3B-II. The celastrol-induced cell death was remarkably restored by the combination of autophagy and apoptosis inhibitors. Furthermore, inhibition of apoptosis enhanced autophagy while suppression of autophagy diminished apoptosis. Celastrol also induced JNK activation and ROS generation. The JNK inhibitor significantly attenuated celastrol-triggered apoptosis and autophagy while ROS scavenger could completely reverse them. The ROS scavenger also prevented G2/M phase arrest and phosphorylation of JNK. Importantly, we found that celastrol had the similar effects on primary osteosarcoma cells. Finally, in vivo, celastrol suppressed tumor growth in the mouse xenograft model. Taken together, our results revealed that celastrol caused G2/M phase arrest, induced apoptosis and autophagy via the ROS/JNK signaling pathway in human osteosarcoma cells. Celastrol is therefore a promising candidate for development of antitumor drugs targeting osteosarcoma.
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Affiliation(s)
- H-Y Li
- Department of Orthopedics, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - J Zhang
- Department of Orthopedics, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - L-L Sun
- Department of Orthopedics, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - B-H Li
- Department of Orthopedics, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - H-L Gao
- Department of Orthopedics, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - T Xie
- Department of Orthopedics, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - N Zhang
- Department of Orthopedics, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Z-M Ye
- Department of Orthopedics, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
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Jiang QL, Zhang S, Tian M, Zhang SY, Xie T, Chen DY, Chen YJ, He J, Liu J, Ouyang L, Jiang X. Plant lectins, from ancient sugar-binding proteins to emerging anti-cancer drugs in apoptosis and autophagy. Cell Prolif 2014; 48:17-28. [PMID: 25488051 DOI: 10.1111/cpr.12155] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2014] [Accepted: 08/28/2014] [Indexed: 02/06/2023] Open
Abstract
Ubiquitously distributed in different plant species, plant lectins are highly diverse carbohydrate-binding proteins of non-immune origin. They have interesting pharmacological activities and currently are of great interest to thousands of people working on biomedical research in cancer-related problems. It has been widely accepted that plant lectins affect both apoptosis and autophagy by modulating representative signalling pathways involved in Bcl-2 family, caspase family, p53, PI3K/Akt, ERK, BNIP3, Ras-Raf and ATG families, in cancer. Plant lectins may have a role as potential new anti-tumour agents in cancer drug discovery. Thus, here we summarize these findings on pathway- involved plant lectins, to provide a comprehensive perspective for further elucidating their potential role as novel anti-cancer drugs, with respect to both apoptosis and autophagy in cancer pathogenesis, and future therapy.
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Affiliation(s)
- Q-L Jiang
- State Key Laboratory of Biotherapy & Collaborative Innovation Center of Biotherapy, Department of Dermatology, Department of Emergency Medicine, West China Hospital, Sichuan University, Chengdu, 610041, China; School of Pharmacy and The First Affiliated Hospital of Chengdu Medical College, Chengdu Medical College, Chengdu, Sichuan, 610500, China; Sichuan Province College Key Laboratory of Structure-Specific Small Molecule Drugs, Chengdu Medical College, Chengdu, Sichuan, 610500, China
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Tong XP, Chen Y, Zhang SY, Xie T, Tian M, Guo MR, Kasimu R, Ouyang L, Wang JH. Key autophagic targets and relevant small-molecule compounds in cancer therapy. Cell Prolif 2014; 48:7-16. [PMID: 25474301 DOI: 10.1111/cpr.12154] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2014] [Accepted: 08/31/2014] [Indexed: 02/05/2023] Open
Abstract
Autophagy is a highly conserved lysosomal degradation process which can recycle unnecessary or dysfunctional cell organelles and proteins, thereby playing a crucial regulatory role in cell survival and maintenance. It has been widely accepted that autophagy regulates various pathological processes, among which cancer attracts much attention. Autophagy may either promote cancer cell survival by providing energy during unfavourable metabolic circumstance or can induce individual cancer cell death by preventing necrosis and increasing genetic instability. Thus, dual roles of autophagy may determine the destiny of cancer cells and make it an attractive target for small-molecule drug discovery. Collectively, key autophagy-related elements as potential targets, oncogenes mTORC1, class I PI3K and AKT, as well as tumour suppressor class III PI3K, Beclin-1 and p53, have been discussed. In addition, some small molecule drugs, such as rapamycin and its derivatives, rottlerin, PP242 and AZD8055 (targeting PI3K/AKT/mTORC1), spautin-1, and tamoxifen, as well as oridonin and metformin (targeting p53), can modulate autophagic pathways in different types of cancer. All these data will shed new light on targeting the autophagic process for cancer therapy, using small-molecule compounds, to fight cancer in the near future.
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Affiliation(s)
- X-P Tong
- State Key Laboratory of Biotherapy & Collaborative Innovation Center of Biotherapy, West China Hospital, Sichuan University, Chengdu, 610041, China; School of Pharmacy, China Pharmaceutical University, Nanjing, 211198, China
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Abstract
Abstract
In this paper, ultrasound was applied in extrusion reaction processing to graft an Elastomer (DE) with maleic anhydride (MAH), in order to improve the non-polarity of DE. Two types of DE-g-MAH were prepared by different methods and had similar grafting degree about 0.2 % and then they were added into the polyamide-6/elastomer (PA6/DE) blends, respectively. The effect of DE-g-MAH on the interfacial properties of PA6/DE blends was studied. The experimental results showed that, compared to the DE-g-MAH initiated by peroxide, DE-g-MAH initiated by ultrasound had better effect on refining the particle size of the dispersion phase and keeping the stability of the phase in the blends, which could be confirmed through SEM and Molau tests. When 5 % DE-g-MAH initiated by peroxide was added, the particle size of dispersion phase was 3.90 μm, however, when 5 % DE-g-MAH initiated by ultrasound was added, the particle size of dispersion phase was 2.82 μm. The results of TGA and mechanical tests showed the improved interfacial interaction and enhanced interfacial adhesion of the blend by adding DE-g-MAH, respectively.
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Affiliation(s)
- W. Bao
- The State Key Laboratory of Polymer Materials Engineering , Polymer Research Institute of Sichuan University, Chengdu , PRC
| | - H. Wu
- The State Key Laboratory of Polymer Materials Engineering , Polymer Research Institute of Sichuan University, Chengdu , PRC
| | - T. Xie
- The State Key Laboratory of Polymer Materials Engineering , Polymer Research Institute of Sichuan University, Chengdu , PRC
| | - S. Guo
- The State Key Laboratory of Polymer Materials Engineering , Polymer Research Institute of Sichuan University, Chengdu , PRC
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Romero N, Xie T, Malfatti E, Schaeffer U, Fardeau M, Laporte J. O.22 Autosomal dominant Core Congenital Myopathy caused by a mutation in the MYH7 gene. Neuromuscul Disord 2013. [DOI: 10.1016/j.nmd.2013.06.732] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Feng JP, Yuan XL, Li M, Fang J, Xie T, Zhou Y, Zhu YM, Luo M, Lin M, Ye DW. Secondary diabetes associated with 5-fluorouracil-based chemotherapy regimens in non-diabetic patients with colorectal cancer: results from a single-centre cohort study. Colorectal Dis 2013; 15:27-33. [PMID: 22594556 DOI: 10.1111/j.1463-1318.2012.03097.x] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
AIM The aim of the study was to analyse the prevalence and characteristics of secondary diabetes induced by 5-fluorouracil (5-FU) based chemotherapy in non-diabetic patients with colorectal cancer (CRC). METHOD A total of 422 consecutive CRC patients who received 5-FU-based chemotherapy were retrospectively analysed. Fasting plasma glucose (FPG) levels were determined before each cycle of chemotherapy during active treatment and regular follow-up. The prevalence and characteristics of secondary hyperglycaemia were investigated, with special focus on the clinical outcome. RESULTS Among the 422 CRC patients, 60 had pre-existing hyperglycaemia. In the remaining 362 with normal FPG levels before chemotherapy, 42 (11.6%) and 41 (11.3%) patients developed diabetes and impaired fasting glucose during the study period. Among the 42 secondary diabetic patients, 22 (52.4%) received anti-diabetes drug therapy, in 7 (16.7%) cases the FPG level returned to normal without any active intervention, and 13 (30.9%) cases received diet control and physiotherapy. Thirty-one (8.6%) patients developed diabetes. Based on the Common Terminology Criteria for Adverse Events, an adverse event over Grade 3 occurred in seven cases during follow-up. Diabetes-related adverse events had a serious negative impact on chemotherapy in six cases. Diabetes-related death occurred in three patients. CONCLUSIONS Secondary diabetes associated with 5-FU-based chemotherapy occurs in around 10% of CRC patients, with a significant negative impact on treatment and clinical outcome. 5-FU-related diabetes should be regarded as a common side effect of 5-FU treatment.
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Affiliation(s)
- J-P Feng
- Department of Oncology, Wuhan Pu-Ai Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China.
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Park CK, Kim YH, Kim JW, Kim TM, Choi SH, Kim YJ, Choi BS, Lee SH, Kim CY, Kim IH, Lee DZ, Kheder A, Forbes M, Craven I, Hadjivassiliou M, Shonka NA, Kessinger A, Aizenberg MR, Weller M, Meisner C, Platten M, Simon M, Nikkhah G, Papsdorf K, Sabel M, Braun C, Reifenberger G, Wick W, Alexandru D, Haghighi B, Muhonen MG, Chamberlain MC, Sumrall AL, Burri S, Brick W, Asher A, Murillo-Medina K, Guerrero-Maldonado A, Ramiro AJ, Cervantes-Sanchez G, Erazo-Valle-Solis AA, Garcia-Navarro V, Sperduto PW, Shanley R, Luo X, Kased N, Sneed PK, Roberge D, Chao S, Weil R, Suh J, Bhatt A, Jensen A, Brown PD, Shih H, Kirkpatrick J, Gaspar LE, Fiveash J, Chiang V, Knisely J, Sperduto CM, Lin N, Mehta MP, Anderson MD, Raghunathan A, Aldape KD, Fuller GN, Gilbert MR, Robins HI, Wang M, Gilbert MR, Chakravarti A, Grimm S, Penas-Prado M, Chaudhary R, Anderson PJ, Elinzano H, Gilbert RA, Mehta M, Aoki T, Ueba T, Arakawa Y, Miyatake SI, Tsukahara T, Miyamoto S, Nozaki K, Taki W, Matsutani M, Shakur SF, Bit-Ivan E, Watkin WG, Farhat HI, Merrell RT, Zwinkels H, Dorr J, Kloet A, Taphoorn MJ, Vecht CJ, Bogdahn U, Stockhammer G, Mahapatra A, Hau P, Schuknecht B, van den Bent M, Heinrichs H, Yust-Katz S, Liu V, Sanghee K, Groves M, Puduvalli V, Levin V, Conrad C, Colman H, Hsu S, Yung AW, Gilbert MR, Kunz M, Armbruster L, Thon N, Jansen N, Lutz J, Herms J, Egensperger R, Eigenbrod S, Kretzschmar H, La CF, Tonn JC, Kreth FW, Brandes AA, Franceschi E, Agati R, Poggi R, Dall'Occa P, Bartolotti M, Di Battista M, Marucci G, Girardi F, Ermani M, Sherman W, Raizer J, Grimm S, Ruckser R, Tatzreiter G, Pfisterer W, Oberhauser G, Honigschnabel S, Aboul-Enein F, Ausch C, Kitzweger E, Hruby W, Sebesta C, Green RM, Woyshner EA, Suchorska B, Jansen NL, Janssen H, Kretzschmar H, Simon M, Hentschel B, Poepperl G, Kreth FW, Linn J, LaFougere C, Weller M, Tonn JC, Suchorska B, Jansen NL, Graute V, Eigenbrod S, Bartenstein P, Kreth FW, LaFougere C, Tonn JC, Hassanzadeh B, Tohidi V, Levacic D, Landolfi JC, Singer S, DeBraganca K, Omuro A, Grommes C, Omar AI, Jalan P, Pandav V, Bekker S, Fuente MIDL, Kaley T, Zhao S, Chen X, Soffietti R, Magistrello M, Bertero L, Bosa C, Crasto SG, Garbossa D, Lolli I, Trevisan E, Ruda R, Ruda R, Bertero L, Bosa C, Trevisan E, Pace A, Carapella C, Dealis C, Caroli M, Faedi M, Bomprezzi C, Thomas AA, Dalmau J, Gresa-Arribas N, Fadul CE, Kumthekar PU, Raizer J, Grimm S, Herrada J, Antony N, Richards M, Gupta A, Landeros M, Arango C, Campos-Gines AF, Friedman P, Wilson H, Streeter JC, Cohen A, Gilreath J, Sageser D, Ye X, Bell SD, McGregor J, Bourekas E, Cavaliere R, Newton H, Sul J, Odia Y, Zhang W, Shih J, Butman JA, Hammoud D, Kreisl TN, Iwamoto F, Fine HA, Berriel LG, Santos FN, Levy AC, Fanelli MF, Chinen LT, da Costa AA, Bourekas E, Wayne Slone H, Bell SD, McGregor J, Bokstein F, Blumenthal DT, Shpigel S, Phishniak L, Yust-Katz S, Garciarena P, Liue D, Yuan Y, Groves MD, Wong ET, Villano JL, Engelhard HH, Ram Z, Sahebjam S, Millar BA, Sahgal A, Laperriere N, Mason W, Levin VA, Hess KR, Choucair AK, Flynn PJ, Jaeckle KA, Kyritsis AP, Yung WKA, Prados MD, Bruner JM, Ictech S, Nghiemphu PL, Lai A, Green RM, Cloughesy TF, Zaky W, Gilles F, Grimm J, Bluml S, Dhall G, Rosser T, Randolph L, Wong K, Olch A, Krieger M, Finlay J, Capellades J, Verger E, Medrano S, Gonzalez S, Gil M, Reynes G, Ribalta T, Gallego O, Segura PP, Balana C, Gwak HS, Joo J, Kim S, Yoo H, Shin SH, Han JY, Kim HT, Yun T, Lee JS, Lee SH, Kim W, Vogelbaum MA, Wang M, Peereboom DM, Macdonald DR, Giannini C, Suh JH, Jenkins RB, Laack NN, Brackman DG, Shrieve DC, Souhami L, Mehta MP, Leibetseder A, Wohrer A, Ackerl M, Flechl B, Sax C, Spiegl-Kreinecker S, Pichler J, Widhalm G, Dieckmann K, Preusser M, Marosi C, Sebastian C, Alejandro M, Bernadette C, Naomi A, Kavan P, Sahebjam S, Garoufalis E, Guiot MC, Muanza T, Del Maestro R, Petrecca K, Sharma R, Curry R, Joyce J, Rosenblum M, Jaffe E, Matasar M, Lin O, Fisher R, Omuro A, Yin C, Iwamoto FM, Fraum TJ, Nayak L, Diamond EL, DeAngelis LM, Pentsova E, Vera-Bolanos E, Gilbert MR, Aldape K, Necesito-Reyes MJ, Fouladi M, Gajjar A, Goldman S, Metellus P, Mikkelsen T, Omuro A, Packer R, Partap S, Pollack IF, Prados M, Ian Robins H, Soffietti R, Wu J, Armstrong TS, Nakada M, Hayashi Y, Miyashita K, Kinoshita M, Furuta T, Sabit H, Kita D, Hayashi Y, Uchiyam N, Kawakami K, Minamoto T, Hamada JI, Diamond EL, Rosenblum M, Heaney M, Carrasquillo J, Krauthammer A, Nolan C, Kaley TJ, Gil MJ, Fuster J, Balana C, Benavides M, Mesia C, Etxaniz O, Canellas J, Perez-Martin X, Hunter K, Johnston SK, Bridge CA, Rockne RC, Guyman L, Baldock AL, Rockhill JK, Mrugala MM, Beard BC, Adair JE, Kiem HP, Swanson KR, Ranjan T, Desjardins A, Peters KB, Alderson L, Kirkpatrick J, Herndon J, Bailey L, Sampson J, Friedman AH, Friedman H, Vredenburgh JJ, Theeler BJ, Ellezam B, Melguizo-Gavilanes I, Shonka NA, Bruner JM, Puduvalli VK, Taylor JW, Flanagan E, O'Neill B, Seigal T, Omuro A, DeAngelis L, Baerhing J, Hoang-Xuan K, Chamberlain M, Batchelor T, Nishikawa R, Pinto F, Blay JY, Korfel A, Schiff D, Fu BD, Kong XT, Bota D, Omuro A, Beal K, Ivy P, Gutin P, Wu N, Kaley T, Karimi S, DeAngelis L, Pentsova H, Nolan C, Grommes C, Chan T, Mathew R, Droms L, Shimizu F, Tabar V, Grossman S, Yovino S, Campian J, Wild A, Herman J, Brock M, Balmanoukian A, Ye X, Portnow J, Badie B, Synold T, Lacey S, D'Apuzzo M, Frankel P, Chen M, Aboody K, Letarte N, Gabay MP, Bressler LR, Stachnik JM, Villano JL, Jaeckle KA, Anderson SK, Willson A, Moreno-Aspitia A, Colon-Otero G, Patel T, Perez E, Peters KB, Reardon DA, Vredenburgh JJ, Desjardins A, Herndon JE, Coan A, McSherry F, Lipp E, Brickhouse A, Massey W, Friedman HS, Alderson LM, Desjardins A, Ranjan T, Peters KB, Friedman HS, Vredenburgh JJ, Ranjan T, Desjardins A, Peters KB, Alderson L, Kirkpatrick J, Herndon J, Bailey L, Sampson J, Friedman AH, Friedman H, Vredenburgh J, Welch MR, Omuro A, Grommes C, Westphal M, Bach F, Reuter D, Ronellenfitsch M, Steinbach J, Pietsch T, Connelly J, Hamza MA, Puduvalli V, Neal ML, Trister AD, Ahn S, Bridge C, Lange J, Baldock A, Rockne R, Mrugala M, Rockhill JK, Lai A, Cloughesy T, Swanson KR, Neuwelt AJ, Nguyen TM, Tyson RM, Nasseri M, Neuwelt EA, Bubalo JS, Barnes PD, Phuphanich S, Hu J, Rudnick J, Chu R, Yu J, Naruse R, Ljubimova J, Sanchez C, Guevarra A, Naor R, Black K, Mahta A, Bhavsar TM, Herath K, Huang C, McClain J, Rizzo K, Sheehan J, Chamberlain M, Glantz M, McClain J, Glantz MJ, Zoccoli C, Nicholas MK, Xie T, White D, Liker S, Gajewski T, Selfridge J, Piccioni DE, Zurayk M, Mody R, Quan J, Li S, Chen W, Chou A, Liau L, Green R, Cloughesy T, Lai A, Gomez-Molinar V, Ruiz-Gonzalez S, Valdez-Vazquez R, Arrieta O, Stenner JI. CLIN-NEURO/MEDICAL ONCOLOGY. Neuro Oncol 2012. [DOI: 10.1093/neuonc/nos229] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Wang FZ, Xie T, Hui M. Increase of ethanol productivity by cell-recycle fermentation of flocculating yeast. Prikl Biokhim Mikrobiol 2011; 47:579-583. [PMID: 22232900] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Using the recombinant flocculating Angel yeast F6, long-term repeated batch fermentation for ethanol production was performed and a high volumetric productivity resulted from half cells not washed and the optimum opportunity of residual glucose 20 g l(-1) of last medium. The obtained highest productivity was 2.07 g l-(1) h(-1), which was improved by 75.4% compared with that of 1.18 g l(-1) h(-1) in the first batch fermentation. The ethanol concentration reached 8.4% corresponding to the yield of 0.46 g g(-1). These results will contribute greatly to the industrial production of fuel ethanol using the commercial method with the flocculating yeast.
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Affiliation(s)
- F Z Wang
- School of Bioengineering, Henan University of Technology, Zhengzhou 450001, PR China.
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Page M, Desarbre E, Gebhardt K, Hofer B, Mueller C, Richalet F, Schmitt-Hoffmann A, Shi W, Xie T, Xu H, Man A. PL-002 Synthesis and antimicrobial activity of the novel siderophore sulfactam BAL30072. Int J Infect Dis 2011. [DOI: 10.1016/s1201-9712(11)60065-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022] Open
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Zhu BF, Wang HD, Shen CM, Fan AY, Yang G, Qin HX, Jin TB, Xie T, Deng L, Lucas R, Lian ZM. Diversity of Killer Cell Immunoglobulin-like Receptor Genes in the Bai Ethnic Minority of Yunnan, China. Scand J Immunol 2011; 73:284-92. [DOI: 10.1111/j.1365-3083.2011.02508.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Peng Q, Su H, Xie T, Hong DZ, Wu QH, Cheng XS. e0610 The Changes of B-type natriuretic peptide in chronic heart failure patients with diabetes mellitus. Heart 2010. [DOI: 10.1136/hrt.2010.208967.610] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Kupferman ME, Jiffar T, El-Naggar A, Yilmaz T, Zhou G, Xie T, Feng L, Wang J, Holsinger FC, Yu D, Myers JN. TrkB induces EMT and has a key role in invasion of head and neck squamous cell carcinoma. Oncogene 2010; 29:2047-59. [PMID: 20101235 DOI: 10.1038/onc.2009.486] [Citation(s) in RCA: 148] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Head and neck squamous cell carcinoma (HNSCC) remains a significant public health problem, accounting for over 5% of all cancer-related deaths, and these deaths primarily result from metastatic disease. The molecular processes involved in HNSCC pathogenesis and progression are poorly understood, and here we present experimental evidence for a direct role of the cell surface receptor tyrosine kinase, TrkB, in HNSCC tumor progression. Using immunohistochemical analysis and transcriptional profiling of archival HNSCC tumor specimens, we found that TrkB and its secreted ligand, brain-derived neurotrophic factor (BDNF), are expresses in greater than 50% of human HNSCC tumors, but not in normal upper aerodigestive tract (UADT) epithelia. Studies with HNSCC cell lines reveal that in vitro stimulation with BDNF, the ligand for TrkB, upregulates the migration and invasion of HNSCC cells, and both transient and stable suppressions of TrkB result in significant abrogation of constitutive and ligand-mediated migration and invasion. Furthermore, enforced overexpression of TrkB results in altered expression of molecular mediators of epithelial-to-mesenchymal transition (EMT), including downregulation of E-cadherin and upregulation of Twist. Using an in vivo mouse model of HNSCC, we were able to show that downregulation of TrkB suppresses tumor growth. These results directly implicate TrkB in EMT and the invasive behavior of HNSCC, and correlate with the in vivo overexpression of TrkB in human HNSCC. Taken together, these data suggest that the TrkB receptor may be a critical component in the multi-step tumor progression of HNSCC, and may be an attractive target for much needed new therapies for this disease.
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Affiliation(s)
- M E Kupferman
- Department of Head and Neck Surgery, Houston TX, USA.
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Abstract
Genomic imprinting is an epigenetic phenomenon affecting a small number of genes, which leads to differential expression from the two parental alleles. Imprinted genes are known to regulate fetal growth and a 'kinship' or 'parental conflict' model predicts that paternally and maternally expressed imprinted genes promote and inhibit fetal growth, respectively. In this review we examine the role of imprinted genes in postnatal growth and metabolism, with an emphasis on the GNAS/Gnas locus. GNAS is a complex imprinted locus with multiple oppositely imprinted gene products, including the G-protein alpha-subunit G(s)alpha that is expressed primarily from the maternal allele in some tissues and the G(s)alpha isoform XLalphas that is expressed only from the paternal allele. Maternal, but not paternal, G(s)alpha mutations lead to obesity in Albright hereditary osteodystrophy. Mouse studies show that this phenomenon is due to G(s)alpha imprinting in the central nervous system leading to a specific defect in the ability of central melanocortins to stimulate sympathetic nervous system activity and energy expenditure. In contrast mutation of paternally expressed XLalphas leads to opposite metabolic effects in mice. Although these findings conform to the 'kinship' model, the effects of other imprinted genes on body weight regulation do not conform to this model.
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Affiliation(s)
- L S Weinstein
- Signal Transduction Section, National Institute of Diabetes, Digestive, and Kidney Disease, National Institutes of Health, Building 10 Rm 8C101, Bethesda, MD 20892-1752, USA.
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Xie T, Fang HY, Zhuge B, Zhuge J. Promotional mechanism of high glycerol productivity in the aerobic batch fermentation of Candida glycerinogenes after feeding several amino acids. APPL BIOCHEM MICRO+ 2009. [DOI: 10.1134/s0003683809030119] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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80
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Xie B, Qin Z, Huang B, Xie T, Yao H, Wei Y, Yang X, Shi D, Jiang H. In vitro culture and differentiation of buffalo (Bubalus bubalis) spermatogonia. Reprod Domest Anim 2008; 45:275-82. [PMID: 19090820 DOI: 10.1111/j.1439-0531.2008.01281.x] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
The objective of this study was to develop a culture system which could support buffalo spermatogonia differentiation into spermatids in vitro. Testes from 3- to 5-month-old buffaloes were decapsulated and seminiferous tubules were enzymatically dissociated to recover spermatogonia and sertoli cells. The cells were cultured in modified Dulbecco modified Eagle medium supplemented with different concentrations of foetal bovine serum, retinol, testosterone for 2 months at 37 degrees C. Spermatogonia and sertoli cells were identified with an antibody against c-kit or GATA4, respectively. The viability of spermatogonia in the media supplemented with different concentrations of serum was all significantly higher (p < 0.05) compared with that in the medium without serum. A-paired or A-aligned spermatogonia and spermatogonial colonies (AP-positive) were observed after 7-10 days of culture and spermatid-like cells with a flagellum (6-8 microm) appeared after 30 days of culture. For cultured conditions, retinol could not significantly promote the formation of spermatid-like cells (p > 0.05), whereas supplementation of testosterone could significantly promote (p < 0.05) the formation of spermatid-like cells after 41 days of culture. The expression of the spermatid-specific marker gene (PRM2) was identified after 30 days of culture by RT-PCR. Yet, the transition protein 1 (TP1, a haploid makers) was not detected. Meanwhile, spermatids developed in vitro were also confirmed by Raman spectroscopy. These results suggest that buffalo spermatogonia could differentiate into spermatids in vitro based on the analysis of their morphology, PRM2 expression and Raman spectroscopy. Yet, the normality of the spermatid-like cells was not supported by TP1 expression.
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Affiliation(s)
- B Xie
- Animal Reproduction Institute, Guangxi University, Nanning, China
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81
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Xie T, Song X, Jin Z, Pan L, Weng C, Chen S, Zhang N. Interactions between stem cells and their niche in the Drosophila ovary. Cold Spring Harb Symp Quant Biol 2008; 73:39-47. [PMID: 19022749 DOI: 10.1101/sqb.2008.73.014] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
The Drosophila ovary contains at least three types of active stem cells, namely, germ-line stem cells (GSCs), escort stem cells (ESCs), and follicular stem cells (FSCs), which work together to efficiently assemble egg chambers. Among the three stem cell types, the GSC is among the first shown to be controlled by the niche due to its easy identification and welldefined surrounding cells. We have shown that the niche controls GSC self-renewal, anchorage, aging, and competition, and the GSC also signals back to the niche for its maintenance. The FSC is an attractive model for studying epithelial stem cell regulation and signal integration because we have shown that it resembles mammalian epithelial stem cells and requires multiple signaling pathways for its self-renewal. In this chapter, we have highlighted the findings of our studies on interactions between Drosophila ovarian stem cells and their niches during normal development and aging and on stem cell competition for niche occupancy. We further discuss their implications in general stem cell biology and future directions in this exciting area.
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Affiliation(s)
- T Xie
- Stowers Institute for Medical Research, Kansas City, Missouri 64110, USA
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82
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Xie T, Liu Q, Xie F, Liu H, Zhang Y. Secretory expression of insulin precursor in pichia pastoris and simple procedure for producing recombinant human insulin. Prep Biochem Biotechnol 2008; 38:308-17. [PMID: 18569877 DOI: 10.1080/10826060802165147] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
In this work, Pichia pastoris was applied to produce human insulin by a simple procedure. The synthesized insulin precursor (ILP) gene was inserted into pPIC9K to obtain secretary expression plasmid pPIC9K/ILP. Pichia pastoris GS115 was transformed by pPIC9K/ILP and the high expresser was screened. In a 16 L fermentor, the insulin precursor production was 3.6 g/L. Insulin precursor, purified by one-step chromatography, was converted into human insulin by transpeptidation. The yield of the processing procedure from insulin precursor to insulin reached up to 70%. In vivo assay showed that the biological activity of the produced recombinant human insulin was 28.8 U/mg.
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Affiliation(s)
- T Xie
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, P. R. China
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83
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Xiao Y, Ge M, Xue X, Wang C, Wang H, Wu X, Li L, Liu L, Qi X, Zhang Y, Li Y, Luo H, Xie T, Gu J, Ren J. Hepatic cytochrome P450s metabolize aristolochic acid and reduce its kidney toxicity. Kidney Int 2008; 73:1231-9. [DOI: 10.1038/ki.2008.103] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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84
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Ucar K, Tchekmedyian NS, Shrina N, Chen Y, Xie T, Hei Y. Effect of zoledronic acid (Zol) compared with placebo on overall disease and bone lesion progression in patients (pts) with bone metastases from certain solid tumors: Stratification by baseline characteristics. J Clin Oncol 2006. [DOI: 10.1200/jco.2006.24.18_suppl.18541] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
18541 Background: Zol has been shown to significantly reduce the risk of skeletal complications compared with placebo in pts with bone metastases from a wide range of solid tumors including a delay of bone lesion progression in pts with renal cancer. To assess whether Zol may reduce the risk of overall disease or bone lesion progression in pts with solid tumors other than breast, non-small cell lung, and prostate cancers, we conducted a retrospective analysis of pts enrolled in a large, randomized, controlled trial. Methods: Pts treated with Zol or placebo were retrospectively stratified by baseline characteristics, including Brief Pain Inventory (BPI) composite pain score, time from initial cancer diagnosis to development of bone metastases, and duration of cancer. The relative risk (RR) of disease progression during 25 months on study was analyzed using the Cox proportional hazards model (stratified log rank). Results: Median baseline BPI pain score was 2.75, median time with cancer was 15 months, and median time to development of bone metastases was 8.5 months. In pts with a baseline BPI score ≥ 2.75 (n = 236), Zol treatment significantly reduced the RR of disease progression by 34% (hazard ratio [HR] = 0.657; P = .014) and the RR of bone lesion progression by 32% (HR = 0.680; P = .028) compared with placebo. Additionally, in pts with cancer duration <15 months (n = 193), Zol treatment reduced the RR of disease progression by 45% (HR = 0.547; P = .002) and the RR of bone lesion progression by 40% (HR = 0.605; P = .016) compared with placebo. Similarly, among pts who developed bone metastases < 8.5 months from initial diagnosis of cancer (n = 193), Zol treatment significantly reduced the RR of disease progression by 39% and the RR of bone lesion progression by 48% compared with placebo (HR = 0.611; P = .009 and HR = 0.519; P = .004, respectively). Conclusions: This exploratory analysis suggests that Zol has potential antitumor effects that may reduce the risk of overall disease and bone lesion progression in pts who have higher pain scores and shorter time to development of bone metastases. Prospective studies are needed to confirm this result. [Table: see text]
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Affiliation(s)
- K. Ucar
- Pacific Shores Medical Group, Long Beach, CA; Novartis Oncology, East Hanover, NJ; Brightech International, Berkeley Heights, NJ
| | - N. S. Tchekmedyian
- Pacific Shores Medical Group, Long Beach, CA; Novartis Oncology, East Hanover, NJ; Brightech International, Berkeley Heights, NJ
| | - N. Shrina
- Pacific Shores Medical Group, Long Beach, CA; Novartis Oncology, East Hanover, NJ; Brightech International, Berkeley Heights, NJ
| | - Y. Chen
- Pacific Shores Medical Group, Long Beach, CA; Novartis Oncology, East Hanover, NJ; Brightech International, Berkeley Heights, NJ
| | - T. Xie
- Pacific Shores Medical Group, Long Beach, CA; Novartis Oncology, East Hanover, NJ; Brightech International, Berkeley Heights, NJ
| | - Y. Hei
- Pacific Shores Medical Group, Long Beach, CA; Novartis Oncology, East Hanover, NJ; Brightech International, Berkeley Heights, NJ
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85
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Hei Y, Lipton A, Shirina N, Chen YM, Xie T. Effect of zoledronic acid (Zol) compared with pamidronate (Pam) on disease progression in breast cancer (BC) patients with bone metastases stratified by baseline characteristics. J Clin Oncol 2006. [DOI: 10.1200/jco.2006.24.18_suppl.678] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
678 Background: Zol has been shown to significantly reduce the risk of skeletal complications compared with Pam in BC pts with bone metastases. Zol has also demonstrated antitumor effects in animal models of human BC and significantly delayed bone lesion progression in pts with renal cancer. To assess whether Zol may reduce the risk of overall disease progression compared with Pam, we conducted a retrospective analysis of BC pts enrolled in a large randomized, controlled trial. Methods: Patients treated with Zol or Pam were retrospectively stratified by baseline characteristics, including Brief Pain Inventory (BPI) composite pain score, time from initial cancer diagnosis to development of bone metastases, and duration of cancer. The relative risk of overall disease progression during 25 months on study was analyzed using the Cox proportional hazards model. Results: Median BPI pain score at baseline was 2.75, median time to development of bone metastases was 44 months, and median time with cancer was 58 months for all patients. In the subset of pts with a baseline BPI score ≥ 2.75 (n = 556), treatment with Zol significantly reduced the risk of disease progression by 21% compared with Pam (hazard ratio [HR] = 0.793; P = .018). Similarly, among pts who developed bone metastases < 44 months from initial diagnosis of cancer (n = 564) and pts with cancer for < 58 months (n = 563), treatment with Zol reduced the risk of disease progression by approximately 20% compared with Pam (HR = 0.805; P = .026 and HR = 0.800; P = .023, respectively). Conclusions: Zol significantly reduced the risk of overall disease progression compared to Pam in specific subsets of pts with higher pain scores and shorter time to development of bone metastases. This exploratory analysis suggests that Zol has potential antitumor effects that may reduce the risk of disease progression in this patient population. These results are consistent with published reports and provide the initiative for further investigations with additional clinical studies. [Table: see text]
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Affiliation(s)
- Y. Hei
- Novartis Oncology, East Hanover, NJ; M.S. Hershey Medical Center, Hershey, PA; Brightech International, Berkeley Heights, NJ
| | - A. Lipton
- Novartis Oncology, East Hanover, NJ; M.S. Hershey Medical Center, Hershey, PA; Brightech International, Berkeley Heights, NJ
| | - N. Shirina
- Novartis Oncology, East Hanover, NJ; M.S. Hershey Medical Center, Hershey, PA; Brightech International, Berkeley Heights, NJ
| | - Y. M. Chen
- Novartis Oncology, East Hanover, NJ; M.S. Hershey Medical Center, Hershey, PA; Brightech International, Berkeley Heights, NJ
| | - T. Xie
- Novartis Oncology, East Hanover, NJ; M.S. Hershey Medical Center, Hershey, PA; Brightech International, Berkeley Heights, NJ
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Nee MJ, Osterwalder A, Neumark DM, Kaposta C, Cibrián Uhalte C, Xie T, Kaledin A, Bowman JM, Carter S, Asmis KR. Experimental and theoretical study of the infrared spectra of BrHI− and BrDI−. J Chem Phys 2004; 121:7259-68. [PMID: 15473794 DOI: 10.1063/1.1794671] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Gas phase vibrational spectra of BrHI- and BrDI- have been measured from 6 to 17 microm (590-1666 cm(-1)) using tunable infrared radiation from the free electron laser for infrared experiments in order to characterize the strong hydrogen bond in these species. BrHI-.Ar and BrDI-.Ar complexes were produced and mass selected, and the depletion of their signal due to vibrational predissociation was monitored as a function of photon energy. Additionally, BrHI- and BrDI- were dissociated into HBr (DBr) and I- via resonant infrared multiphoton dissociation. The spectra show numerous transitions, which had not been observed by previous matrix studies. New ab initio calculations of the potential-energy surface and the dipole moment are presented and are used in variational ro-vibrational calculations to assign the spectral features. These calculations highlight the importance of basis set in the simulation of heavy atoms such as iodine. Further, they demonstrate extensive mode mixing between the bend and the H-atom stretch modes in BrHI- and BrDI- due to Fermi resonances. These interactions result in major deviations from simple harmonic estimates of the vibrational energies. As a result of this new analysis, previous matrix-isolation spectra assignments are reevaluated.
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Affiliation(s)
- M J Nee
- Department of Chemistry, University of California, Berkeley, California 94720, USA
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88
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Xie T, Ghiaasiaan S, Karrila S. Artificial neural network approach for flow regime classification in gas–liquid–fiber flows based on frequency domain analysis of pressure signals. Chem Eng Sci 2004. [DOI: 10.1016/j.ces.2004.02.017] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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89
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Jiang Z, Xie T, Geng B, Wang G, Wu G, Yuan X, Meng G, Zhang L. Synthesis of core-shell nanowires of FeCoNi alloy core with silicon oxide layers. INORG CHEM COMMUN 2004. [DOI: 10.1016/j.inoche.2004.04.016] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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90
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Lu S, Qing C, Xie T, Wang M, Niu Y, Ge K, Jin S, Liao Z, Shi J. 137 The cutaneous "Underlying disorder" in diabetic rats. Wound Repair Regen 2004. [DOI: 10.1111/j.1067-1927.2004.0abstractef.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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91
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Abstract
Catechol-O-methyltransferase (COMT) is a crucial enzyme in dopamine and levodopa metabolism. Previously we reported that physiological concentrations of 17beta-estradiol (E2) down-regulated steady-state 1.3-kb COMT mRNA levels in MCF-7 cells. In this study, we investigated whether similar reductions occurred in a glial cell line (U138MG) and whether COMT protein and activity levels paralleled the reduction in COMT mRNA levels in MCF-7 cells. In addition, we explored the mechanism of E2 action. E2 had no effect on COMT mRNA levels in U138MG cells, but significantly reduced COMT protein and activity in MCF-7 cells (activity by 53% at 10(-7) M of E2, by 45% at 10(-8) M, and by 28% at 10(-9) M relative to non-E2-treated cells). A specific estrogen receptor antagonist (ICI 182780) blocked these estrogenic effects. Estrogen receptor in nuclear extracts of MCF-7 cells, which were pretreated with E2 (10(-9) M) for 48 h, bound to the whole proximal and distal promoter regions, as determined by electrophoretic mobility shift analysis (EMSA). We propose that E2 decreased COMT activity through down-regulation of its gene and protein expression mediated via ER interaction with response elements in the promoter region of the gene. Our findings may explain the lower of COMT activity in women compared to that in men, and, in part, the beneficial effects of E2 therapy in post-menopausal Parkinson's disease patients.
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Affiliation(s)
- H Jiang
- Division of Neurology, University Department of Medicine, University of Hong Kong, Queen Mary Hospital, Hong Kong, PR China
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92
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Xie T, Ghiaasiaan SM, Karrila S. Flow Regime Identification in Gas/Liquid/Pulp Fiber Slurry Flows Based on Pressure Fluctuations Using Artificial Neural Networks. Ind Eng Chem Res 2003. [DOI: 10.1021/ie0304199] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- T. Xie
- G. W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0405, and Institute of Paper Science and Technology, Atlanta, Georgia 30318-5794
| | - S. M. Ghiaasiaan
- G. W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0405, and Institute of Paper Science and Technology, Atlanta, Georgia 30318-5794
| | - S. Karrila
- G. W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0405, and Institute of Paper Science and Technology, Atlanta, Georgia 30318-5794
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94
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Xie T, Zeidel M, Pan Y. Detection of tumorigenesis in urinary bladder with optical coherence tomography: optical characterization of morphological changes. Opt Express 2002; 10:1431-43. [PMID: 19452010 DOI: 10.1364/oe.10.001431] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Most transitional cell tumorigenesis involves three stages of subcellular morphological changes: hyperplasia, dysplasia and neoplasia. Previous studies demonstrated that owing to its high spatial resolution and intermediate penetration depth, current OCT technology including endoscopic OCT could delineate the urothelium, submucosa and the upper muscular layers of the bladder wall. In this paper, we will discuss the sensitivity and limitations of OCT in diagnosing and staging bladder cancer. Based on histomorphometric evaluations of nuclear morphology, we modeled the resultant backscattering changes and the characteristic changes in OCT image contrast. In the theoretical modeling, we assumed that nuclei were the primary sources of scattering and were uniformly distributed in the uroepithelium, and compared with the results of the corresponding prior OCT measurements. According to our theoretical modeling, normal bladder shows a thin, uniform and low scattering urothelium, so does an inflammatory lesion except thickening in the submucosa. Compared with a normal bladder, a hyperplastic lesion exhibits a thickened, low scattering urothelium whereas a neoplastic lesion shows a thickened urothelium with increased backscattering. These results support our previous animal study that OCT has the potential to differentiate inflammation, hyperplasia, and neoplasia by quantifying the changes in urothelial thickening and backscattering. The results also suggest that OCT might not have the sensitivity to differentiate the subtle morphological changes between hyperplasia and dysplasia based on minor backscattering differences.
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95
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Ramsden DB, Parsons RB, Ho SL, Xie T, Waring RH, Williams AC. Further studies in xenobiotic metabolism and Parkinson's disease. Adv Neurol 2002; 86:105-13. [PMID: 11553967] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Affiliation(s)
- D B Ramsden
- Department of Medicine, University of Birmingham, Queen Elizabeth Hospital, Edgbaston, Birmingham B15 2TH, U.K
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96
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Barrett T, Xie T, Piao Y, Dillon-Carter O, Kargul GJ, Lim MK, Chrest FJ, Wersto R, Rowley DL, Juhaszova M, Zhou L, Vawter MP, Becker KG, Cheadle C, Wood WH, McCann UD, Freed WJ, Ko MS, Ricaurte GA, Donovan DM. A murine dopamine neuron-specific cDNA library and microarray: increased COX1 expression during methamphetamine neurotoxicity. Neurobiol Dis 2001; 8:822-33. [PMID: 11592851 DOI: 10.1006/nbdi.2001.0423] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Due to brain tissue heterogeneity, the molecular genetic profile of any neurotransmitter-specific neuronal subtype is unknown. The purpose of this study was to purify a population of dopamine neurons, construct a cDNA library, and generate an initial gene expression profile and a microarray representative of dopamine neuron transcripts. Ventral mesencephalic dopamine neurons were purified by fluorescent-activated cell sorting from embryonic day 13.5 transgenic mice harboring a 4.5-kb rat tyrosine hydroxylase promoter-lacZ fusion. Nine-hundred sixty dopamine neuron cDNA clones were sequenced and arrayed for use in studies of gene expression changes during methamphetamine neurotoxicity. A neurotoxic dose of methamphetamine produced a greater than twofold up-regulation of the mitochondrial cytochrome c oxidase polypeptide I transcript from adult mouse substantia nigra at 12 h posttreatment. This is the first work to describe a gene expression profile for a neuronal subtype and to identify gene expression changes during methamphetamine neurotoxicity.
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Affiliation(s)
- T Barrett
- Research Resources Branch, Laboratory of Genetics, Intramural Research Program, National Institute on Aging, 5600 Nathan Shock Drive, Baltimore, Maryland 21224-6825, USA
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Xie T, Liang YM, Liu WY, Li BJ, Ma YX. The structure dependent electrochemical-response of novel 1-(4-mercaptobutyl)-4-(2-ferrocenylvinyl)pyridinium bromide SAMs on an au electrode. Chem Commun (Camb) 2001:1578-9. [PMID: 12240390 DOI: 10.1039/b101154p] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The 1-(4-mercaptobutyl)-4-(2-ferrocenylvinyl)pyridinium bromide (1-HS(CH2)(4)-4-[(E)-FcCH=CH]C5H4N)+Br- and its hydrogenated product [1-HS(CH2)(4)-4-(-FcCH2CH2)C5H4N]+Br- were synthesized and assembled on an Au electrode to form self-assembled monolayers which showed a structure-dependent electrochemical-response in phosphate buffer aqueous solutions (pH = 7).
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Affiliation(s)
- T Xie
- National Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, People's Republic of China
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98
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Abstract
Although the increased expression of Igf-I in liver in response to GH is well characterized, the intracellular signaling pathways that mediate this effect have not been identified. Intracellular signaling molecules belonging to the Janus kinase-signal transducer and activator of transcription 5b (JAK2-STAT5b) pathway are activated by GH and have previously been shown to be required for sexually dimorphic body growth and the expression of liver cytochrome P450 proteins known to be regulated by the gender-specific temporal patterns of pituitary GH secretion. Here, we evaluate the role of STAT5b in GH activation of Igf-I by monitoring the induction of Igf-I mRNA in livers of wild-type and Stat5b(-/-)mice stimulated with exogenous pulses of GH. GH induced the expression of liver Igf-I mRNA in hypophysectomized male wild-type, but not in hypophysectomized male Stat5b(-/-) mice, although the Stat5b(-/-) mice exhibit both normal liver GH receptor expression and strong GH induction of Cytokine-inducible SH2 protein (Cis), which is believed to contribute to the down-regulation of GH-induced liver STAT5b signaling. Thus, STAT5b plays an important and specific role in liver Igf-I gene expression.
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Affiliation(s)
- H W Davey
- AgResearch, Ruakura Research Centre, Hamilton 2001, New Zealand.
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Xie T, Marshall WD. Approaches to soil remediation by complexometric extraction of metal contaminants with regeneration of reagents. J Environ Monit 2001; 3:411-6. [PMID: 11523442 DOI: 10.1039/b009876k] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Complexometric equilibrations were performed with six chelating reagents to mobilise Cu, Mn, Pb and Zn from a contaminated urban soil. The metal-laden aqueous extract was treated with sodium diethyldithiocarbamate (DEDTC) to precipitate the heavy metals from solution while liberating the chelating reagent. The aqueous supernatant fraction was then re-combined with the soil particulates to extract more pollutants. A sparing quantity of EDTA (ethylenediaminetetraacetic acid; 10 mmol) mobilised 32-54% of the 5 mmol of heavy metals from the soil with three cycles but only 0.1 and 1.0% of the iron and magnesium, respectively, was removed. Whereas DPTA (1,3-diamino-2-hydroxypropane-N,N,N',N'-tetraacetic acid) and citric acid also mobilised each of the heavy metals to some extent and continued to extract these metals during all three cycles, the DTPA (diethylenetriamine pentaacetic acid), although efficient initially, could not be recycled with these conditions. ADA [N-(2-acetamido)iminodiacetate] and SCMC [(S)-carboxymethyl-L-cysteine] were selective for copper and zinc but mobilised only Cu when recycled. An alternate means of regenerating the chelating reagent involved treatment of the aqueous extract with magnesium (Mg0) granules. Excess HEDC [bis(2-hydroxyethyl)dithiocarbamate] mobilised appreciable quantities (19-57%) of heavy metals from the soil and retained its complexing activity when recycled. An appreciable fraction of the mobilised Pb and Cu and a portion of the Zn were cemented to the surfaces of the excess magnesium whereas virtually all of the Fe and Mn was removed from solution as insoluble hydroxides.
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Affiliation(s)
- T Xie
- Dept. of Food Science and Agricultural Chemistry, Macdonald Campus of McGill, 21111 Lakeshore Road, Ste-Anne-de-Bellevue, Québec, Canada H9X 3V9
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Schenkman ML, Clark K, Xie T, Kuchibhatla M, Shinberg M, Ray L. Spinal movement and performance of a standing reach task in participants with and without Parkinson disease. Phys Ther 2001; 81:1400-11. [PMID: 11509070 DOI: 10.1093/ptj/81.8.1400] [Citation(s) in RCA: 79] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
BACKGROUND AND PURPOSE Evidence suggests that individuals with early and mid-stage Parkinson disease (PD) have diminished range of motion (ROM). Spinal ROM influences the ability to function. In this investigation, the authors examined available spinal ROM, segmental excursions (the ROM used) during reaching, and their relationships in community-dwelling adults with and without PD. SUBJECTS The subjects were 16 volunteers with PD (modified Hoehn and Yahr stages 1.5-3) and 32 participants without PD who were matched for age, body mass index, and sex. METHODS Range of motion of the extremities was measured using a goniometer, and ROM of the spine was measured using the functional axial rotation (FAR) test, a measure of unrestricted cervico-thoracic-lumbar rotation in the seated position. Motion during reaching was determined using 3-dimensional motion analysis. Group differences were determined using multivariable analysis of variance followed by analysis of variance. Contributions to total reaching distance of segmental excursions (eg, thoracic rotation, thoracic lateral flexion) were determined using forward stepwise regression. RESULTS Subjects with PD as compared with subjects without PD had less ROM (FAR of 98.2 degrees versus 110.3 degrees, shoulder flexion of 151.9 degrees versus 160.1 degrees) and less forward reaching (29.5 cm versus 34.0 cm). Lateral trunk flexion and total rotation relative to the ground contributed to reaching, with the regression model explaining 36% of the variance. DISCUSSION AND CONCLUSION These results contribute to the growing body of evidence demonstrating that spinal ROM is impaired early in PD.
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Affiliation(s)
- M L Schenkman
- Physical Therapy Program, Department of Rehabilitation Medicine, University of Colorado Health Sciences Center, 4200 E Ninth Ave, C244, Denver, CO, USA.
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