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Yang S, Shen Y, Niu Y, Hildebrandt T, Jewgenow K, Goeritz F, He X, Zhou Q, Ji W. Effects of rhFSH regimen and time interval on ovarian responses to repeated stimulation cycles in rhesus monkeys during a physiologic breeding season. Theriogenology 2008; 70:108-14. [DOI: 10.1016/j.theriogenology.2008.03.012] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2007] [Revised: 02/11/2008] [Accepted: 03/12/2008] [Indexed: 10/22/2022]
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277
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Zhang G, Niu Y, Jiang Z, Yi B, Kessel D, Ampey L, Yu C. SU-GG-T-70: Three-Field IMRT for Large Breasts. Med Phys 2008. [DOI: 10.1118/1.2961821] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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278
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Evans R, Niu Y. Hypolipidaemic effects of high-dose insulin therapy. Br J Anaesth 2008; 100:429-33. [DOI: 10.1093/bja/aen027] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
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279
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Tessier DR, Niu Y, Seccombe DP, Reddish TJ, Alderman AJ, Birdsey BG, Read FH, Hammond P. Passive electrostatic recycling spectrometer of desk-top size for charged particles of low kinetic energy. PHYSICAL REVIEW LETTERS 2007; 99:253201. [PMID: 18233517 DOI: 10.1103/physrevlett.99.253201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2007] [Indexed: 05/25/2023]
Abstract
A passive electrostatic recycling spectrometer for charged particles is described and demonstrated to store electrons with typical kinetic energies of tens of eV. The design of the charged particle optics and the basic operating characteristics of the storage ring are discussed. The storage lifetime achieved is approximately 50 micros, which is target gas pressure limited and corresponds to approximately 200 orbits of the 0.65 m orbital circumference. The storage ring also has controllable energy dispersive elements enabling it to operate as a spectroscopic device.
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Niu Y, Epperly MW, Shen H, Smith T, Wang H, Greenberger JS. Intraesophageal MnSOD-plasmid liposome enhances engraftment and self-renewal of bone marrow derived progenitors of esophageal squamous epithelium. Gene Ther 2007; 15:347-56. [PMID: 18097469 DOI: 10.1038/sj.gt.3303089] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
We evaluated whether the improved esophageal radiation tolerance following Manganese Superoxide Dismutase (MnSOD)-Plasmid Liposomes was explained by improved engraftment of bone marrow-derived progenitors. C57BL/6NHsd female mice pretreated with intraesophageal MnSOD-PL were irradiated to 29 Gy to the esophagus and intravenously transplanted with marrow from male B6. 129S7-Gt (ROSA) 26S OR/J ROSA (Lac-Z+, G418-resistant) mice. After 14 days, esophagi were removed and side population and non-side population cells evaluated for donor multilineage (endothelin/vimentin/F480) positive esophageal cells. Serial intravenous transplantability was tested in second generation 29 Gy esophagus-irradiated mice. Esophagi from recipients receiving swallowed MnSOD-PL 24 h prior to irradiation demonstrated significantly increased esophageal repopulation with donor bone marrow-derived Lac-Z+, G418+, Y-probe+ multilineage cells (37.8+/-1.8>50 cell Lac-Z+ foci per esophagus) compared to irradiated controls (19.8+/-1.8) P<0.0001. Serial transfer to second-generation irradiated C57BL/6NHsd mice of intravenously injected SP or NSP first generation recipient esophagus cells was also significantly enhanced by MnSOD-PL intraesophageal pretreatment (74.4+/-3.6 SP-derived Lac-Z+ foci per esophagus, 48.6+/-5.4 NSP-derived) compared to irradiation controls (23.4+/-1.8 SP, 6.0+/-3.0 NSP), P<0.0001. Thus, intraesophageal MnSOD-PL administration enhances engraftment of marrow-derived progenitors.
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281
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Zhang J, Wang H, He X, Niu Y, Li X. Radiographic examination of 41 cases of odontogenic myxomas on the basis of conventional radiographs. Dentomaxillofac Radiol 2007; 36:160-7. [PMID: 17463101 DOI: 10.1259/dmfr/38484807] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVE There are some different radiographic appearances of odontogenic myxoma that have not been reported in the published literature. The purpose of this article is to offer rare views of odontogenic myxomas and analyse the characteristics of the radiographic appearances. MATERIALS AND METHODS We reviewed the radiographic appearances of 41 cases of odontogenic myxomas on conventional radiographs, recruited from patients who visited the Department of Oral Radiology, West China College of Stomatology, Sichuan University between 1964 and 2005. The diagnoses of the cases were verified by histopathology. RESULTS On conventional radiographs, odontogenic myxomas presented varying radiographic appearances, which could be divided into six types as follows: Type I-unilocular; Type II-multilocular (including honeycomb, soap bubble and tennis racquet patterns); Type III-involvement of local alveolar bone; Type IV-involvement of the maxillary sinus; Type V-osteolytic destruction and Type VI-a mix of osteolytic destruction and osteogenesis. CONCLUSION Odontogenic myxoma has variable radiographic appearances on conventional radiographs. This classification system helps us better understand the radiographic appearances of odontogenic myxoma on conventional radiographs.
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282
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Ma H, Niu Y, Wang Z, Li Z, Hua M, Xie Z. Association of the spectral features of heart period signal with SNP of NOS in the Chinese Han nationality population. CONFERENCE PROCEEDINGS : ... ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL CONFERENCE 2007; 2005:2463-6. [PMID: 17282736 DOI: 10.1109/iembs.2005.1616967] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
To explore association of the spectral features of heart period signal with SNPs at 5 sites of NOS gene in the subjects (male89, female77, aged 62.40+/-2.5 yrs) by allele specific primer PCR technique. It was found that the TT allelic genotype of NOS2 C-1173T associated with the highest RPH and TT allelic genotype of NOS3 G894T associated with the highest APH in HPS spectral parameters. This suggests the SNPs of NOS2 C-1173T and NOS3 G894T may be the deep layer factors to result in the variability of HPS spectral parameters.
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283
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Wang S, Tang X, Niu Y, Chen H, Li T, Tan T, Ji W. 230 GENERATION OF PUTATIVE RABBIT EMBRYONIC STEM CELLS. Reprod Fertil Dev 2007. [DOI: 10.1071/rdv19n1ab230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
The rabbit, as a laboratory animal model, has several advantages in the study of human physiological disorders. In this study, stable putative pluripotent rabbit embryonic stem cells (rESCs) were derived from in vivo-fertilized and in vitro-cultured blastocysts. The rabbit ICMs were obtained by 0.05% trypsin–0.008% EDTA treatment and mechanical separation; the ES-like cell colonies seen several days later. ICM-derived outgrowths which were treated with 5 mg/mL-1 dispase, followed by 0.05% trypsin–0.008% EDTA, were mechanically disaggregated into small clumps and reseeded on MEFs. The putative ES cell lines maintained expression of pluripotent cells markers and normal XY karyotype for long periods of culture (>1 month). The putative rESCs expressed alkaline phosphatase, transcription factor Oct-4, stage-specific embryonic antigens (SSEA-1, SSEA-3, and SSEA-4), and tumor-related antigens (TRA-1-60 and TRA-1-81). The morphological characteristics of the putative ESCs are closer to those of human ESCs; their high speed of proliferation, however, is closer to that of mouse ESCs. Putative rabbit ESCs were induced to differentiate into many cell types including trophoblast cells, similar to primate ESCs, in vitro, and formed teratomas with derivatives of the 3 major germ layers in vivo when injected into SCID mice. Using RT-PCR measurement, but with some differences in ligands and inhibitors, and comparing with human and mouse ESCs, the putative rabbit ESCs expressed similar genes related to pluripotency (Oct-4, Nanog, SOX2, and UTF-1) and similar genes of FGF, WNT, and TGF signaling pathways related to the proliferation and self-renewal. Our further research work showed that TGF beta and FGF pathways cooperate to maintain pluripotency of rabbit ESCs similar to those of human ES cells.
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284
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Epperly M, Niu Y, Greenberger J. 2650. Int J Radiat Oncol Biol Phys 2006. [DOI: 10.1016/j.ijrobp.2006.07.1065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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285
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Niu Y, Ho D. Design of sliding mode control for nonlinear stochastic systems subject to actuator nonlinearity. ACTA ACUST UNITED AC 2006. [DOI: 10.1049/ip-cta:20050194] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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286
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Ge J, Li Y, Qian J, Shi J, Wang Q, Niu Y, Fan B, Liu X, Zhang S, Sun A, Zou Y. Efficacy of emergent transcatheter transplantation of stem cells for treatment of acute myocardial infarction (TCT-STAMI). Heart 2006; 92:1764-7. [PMID: 16775089 PMCID: PMC1861266 DOI: 10.1136/hrt.2005.085431] [Citation(s) in RCA: 135] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
OBJECTIVE To study whether emergent intracoronary autologous bone marrow cell transplantation (BMT) is applicable for the treatment of acute myocardial infarction (AMI). METHODS 20 patients admitted within 24 h after the onset of a first AMI were randomly allocated to receive intracoronary autologous BMT (n = 10) or bone marrow supernatant (controls, n = 10) immediately after primary percutaneous coronary intervention. Left ventricular ejection fraction (LVEF), left ventricular end diastolic internal diameter (LVDd) and myocardial perfusion defect scores were examined respectively by echocardiography and single-photon emission computed tomography at one week and six months after AMI. RESULTS From one week to six months after AMI, LVEF was enhanced from mean 53.8 (SD 9.2)% to 58.6 (9.9)% (p < 0.05) in the BMT group but was unchanged in the control group (58.2 (7.5)% v 56.3 (3.5)%, p > 0.05); LVDd remained unchanged (52.5 (2.8) v 52.1 (3.2) mm, p > 0.05) in the BMT group but was significantly enlarged in the control group (50.4 (6.0) v 55.2 (7.1) mm, p < 0.05). Additionally, myocardial perfusion defect scores decreased from 21 (11) to 13 (10) (p < 0.01) in the BMT group but were unchanged in the control group (20 (14) v 17 (15), p > 0.05). CONCLUSION Emergent intracoronary transplantation of bone marrow mononuclear cells after AMI is practicable, and it improved cardiac function, prevented myocardial remodelling and increased myocardial perfusion at six months' follow up.
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Zhang H, Xu L, Xiao D, Xie J, Zeng H, Cai W, Niu Y, Yang Z, Shen Z, Li E. Fascin is a potential biomarker for early-stage oesophageal squamous cell carcinoma. J Clin Pathol 2006; 59:958-64. [PMID: 16524962 PMCID: PMC1860492 DOI: 10.1136/jcp.2005.032730] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
BACKGROUND Fascin, an actin-binding protein, is usually expressed at a low level in normal epithelium, but is markedly up regulated in several types of carcinomas. Reports on fascin expression in oesophageal squamous cell carcinoma (ESCC) and precancerous lesions remain rare. AIM To show the roles of fascin in the progression from normal epithelium to invasive ESCC. METHODS Fascin expression in 102 sections embedded in paraffin wax, including samples of normal mucosa (n = 20), dysplasia (n = 10), ESCC (n = 62) and special sections (n = 10) of a full-length mucosa layer from the distant margin to the cancer focus of the excised oesophagus, and 49 fresh specimens of ESCC was analysed by immunohistochemistry, western blot and real-time reverse transcription-polymerase chain reaction. Fascin expression in ESCC cell lines was also investigated. RESULTS In the immunohistochemical study, the positive rate of fascin was significantly higher in the tumour tissue than in the normal epithelium (p = 0.020), but no significant difference was shown between ESCC and dysplasia (p = 1.000). Immunostaining for fascin was only apparent in the basal layer of the normal epithelium. However, in the dysplasia, positive staining was observed in most of the heterogeneous cells from the basal layer to the granular layer of the epithelium. Fascin expression was seen to increase progressively from the normal epithelium to invasive ESCC. Up regulation of fascin was observed in 87.76% (43/49) and 77.55% (38/49) of the specimens, respectively, using western blot and real-time reverse transcription-polymerase chain reaction assays; 80% (4/5) of ESCC cell lines also expressed fascin at a high level. Furthermore, overexpression of fascin was markedly correlated with cell proliferation and lymph node metastasis. CONCLUSIONS These findings suggested that fascin was associated with the transformation and development of ESCC and implicated the potential of fascin as a novel biomarker that would allow the tumour to be identified at an early stage in high-risk individuals.
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288
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Niu Y, Epperly M, Carlos T, Zhang X, Greenberger J. Role of Bone Marrow Derived Macrophages and Stromal Cells in Irradiation-Induced Pulmonary Fibrosis. Int J Radiat Oncol Biol Phys 2005. [DOI: 10.1016/j.ijrobp.2005.07.800] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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289
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Yang P, Haken AE, Niu Y, Chaney SR, Hicks KB, Eckhoff SR, Tumbleson ME, Singh V. Effect of Steeping with Sulfite Salts and Adjunct Acids on Corn Wet-Milling Yields and Starch Properties. Cereal Chem 2005. [DOI: 10.1094/cc-82-0420] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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290
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Zhang Z, Feng H, Niu Y, Eckhoff SR. Starch Recovery from Degermed Corn Flour and Hominy Feed Using Power Ultrasound. Cereal Chem 2005. [DOI: 10.1094/cc-82-0447] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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291
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Carpenter M, Epperly MW, Agarwal A, Nie S, Hricisak L, Niu Y, Greenberger JS. Inhalation delivery of manganese superoxide dismutase-plasmid/liposomes protects the murine lung from irradiation damage. Gene Ther 2005; 12:685-93. [PMID: 15750616 DOI: 10.1038/sj.gt.3302468] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Intratracheal injection of manganese superoxide dismutase-plasmid/liposome (MnSOD-PL) complexes has been demonstrated to delay the onset and reduce the extent of ionizing irradiation-induced murine pulmonary organizing alveolitis/fibrosis. To facilitate translation of this modality to clinical fractionated radiotherapy, inhalation delivery of MnSOD-PL was developed using an ultrasonic nebulizer. Transgene product was quantitated by immunohistochemical quantitation and pulmonary tissue levels of MnSOD biochemical activity. C57BL/6NHsd female mice demonstrated a plasmid dose-dependent increased expression of MnSOD transgene product over the range of 250 microg-2.5 mg of MnSOD-PL administered over a constant 5 min interval. Delivery of a constant concentration of 500 microg of MnSOD-PL with varying times of administration ranging from 0.5 to 10 min demonstrated optimal MnSOD expression at 5 min. Mice pretreated by inhalation delivery of MnSOD-PL demonstrated significantly improved survival after 20 Gy single fraction irradiation to both lungs compared to LacZ-PL inhalation-treated or irradiated control mice. Mice receiving 10 fractions of 3.5 cGy demonstrated increased pulmonary MnSOD transgene product activity by a protocol of every Monday-Wednesday or daily inhalation of MnSOD-PL. Thus, inhalation radioprotective gene therapy using MnSOD-PL provides a practical and effective method for delivery of lung-specific radioprotection during fractionated radiotherapy protocols in a mouse model.
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292
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Niu Y, Epperly M, Zhang X, Carpenter M, Greenberger J. Prevention of irradiation-induced esophagitis by injections of bone marrow or esophageal stem cells. Int J Radiat Oncol Biol Phys 2004. [DOI: 10.1016/j.ijrobp.2004.06.103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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293
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Niu Y, Wang X, Ho D, Lam J. Sliding-mode control for nonlinear state-delayed systems using neural-network approximation. ACTA ACUST UNITED AC 2003. [DOI: 10.1049/ip-cta:20030321] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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294
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Wilkins MR, Wang P, Xu L, Niu Y, Tumbleson ME, Rausch KD. Variability in Starch Acetylation Efficiency from Commercial Waxy Corn Hybrids. Cereal Chem 2003. [DOI: 10.1094/cchem.2003.80.1.68] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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295
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Wilkins MR, Wang P, Xu L, Niu Y, Tumbleson ME, Rausch KD. Variability of Reaction Efficiencies and Pasting Properties of Acetylated Dent Corn Starch from Various Commercial Hybrids. Cereal Chem 2003. [DOI: 10.1094/cchem.2003.80.1.72] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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296
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Murphy LC, Leygue E, Niu Y, Snell L, Ho SM, Watson PH. Relationship of coregulator and oestrogen receptor isoform expression to de novo tamoxifen resistance in human breast cancer. Br J Cancer 2002; 87:1411-6. [PMID: 12454770 PMCID: PMC2376286 DOI: 10.1038/sj.bjc.6600654] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2002] [Revised: 09/04/2002] [Accepted: 09/19/2002] [Indexed: 11/09/2022] Open
Abstract
This study addresses the hypothesis that altered expression of oestrogen receptor-beta and/or altered relative expression of coactivators and corepressors of oestrogen receptors are associated with and may be mechanisms of de novo tamoxifen resistance in oestrogen receptor positive breast cancer. All cases were oestrogen receptor +, node negative, primary breast tumours from patients who later had no disease progression (tamoxifen sensitive) or whose disease progressed while on tamoxifen (tamoxifen resistant). Using an antibody to oestrogen receptor-beta that detects multiple forms of this protein (total) but not an antibody that detects only full-length oestrogen receptor-beta 1, it was found that high total oestrogen receptor beta protein expressors were more frequently observed in tamoxifen sensitive tumours than resistant tumours (Fisher's exact test, P=0.046). However, no significant differences in the relative expression of oestrogen receptor beta2, oestrogen receptor beta5 and full-length oestrogen receptor beta1 RNA in the tamoxifen sensitive and resistant groups were found. Also, when the relative expression of two known coactivators, steroid receptor RNA activator and amplified in breast cancer 1 RNA to the known corepressor, repressor of oestrogen receptor activity RNA, was examined, no significant differences between the tamoxifen sensitive and resistant groups were found. Altogether, there is little evidence for altered coregulators expression in breast tumours that are de novo tamoxifen resistant. However, our data provide preliminary evidence that the expression of oestrogen receptor beta protein isoforms may differ in primary tumours of breast cancer patients who prove to have differential sensitivity to tamoxifen therapy.
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297
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Zheng YX, Chan P, Pan ZF, Shi NN, Wang ZX, Pan J, Liang HM, Niu Y, Zhou XR, He FS. Polymorphism of metabolic genes and susceptibility to occupational chronic manganism. Biomarkers 2002; 7:337-46. [PMID: 12171760 DOI: 10.1080/13547500210146740] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
In this study we investigated genetic polymorphisms of five metabolizing genes and their association with occupational chronic manganism. We recruited 49 patients with chronic manganism and 50 unrelated healthy control subjects who were welders and ferromanganese smelters and occupationally exposed to manganese dust and fume in the same workshops from three metallurgical industries. The controls were matched to the cases by sex, age, cigarette and alcohol intake, as well as the manganese exposure duration. Polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) was used to genotype the cytochrome P450 2D6L gene (CYP2D6L) and the NAD(P)H:quinone oxidoreductase gene (NQO1). Allele-specific PCR was used to detect the cytochrome P450 1A1 gene (CYP1A1), and the glutathione-S-transferase mu and theta genes (GSTM and GSTT). The frequency of polymorphic alleles, a mutation of CYP2D6L, was significantly lower in patients with chronic manganism (16.3%) than in controls (29.0%). Individuals with the homozygote polymorphism (L/L) of CYP2D6 had a 90% decreased risk of chronic manganism compared with the wild-type (Wt/Wt) (odds ratio =0.10, 95% confidence interval = 0.01-0.82). A significant association between the CYP2D6 genotype subgroup and the latency of chronic manganese poisoning was also found. Patients who had homozygous (L/L) or heterozygous (Wt/L) mutant alleles developed manganism an average of 10 years later than those who were homozygous wildtype (Wt/Wt). However, the allele and genotype frequencies of CYP1A1 and NQO1 genes were distributed similarly in cases and controls. In addition, no difference in the frequencies of GSTM1 and GSTT1 null genotypes were observed between cases and controls. The results suggest that CYP2D6L gene polymorphism might influence susceptibility to manganese-induced neurotoxicity. However, because of limited sample size, our results should be validated in large-scale studies.
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298
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Niu Y, Fu GY, Gesmundo F. The corrosion of a Fe-15 wt.% Ce alloy in coal gasification type atmospheres at 600 to 800 °C. ACTA ACUST UNITED AC 2002. [DOI: 10.1361/105497102770332225] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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299
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Niu Y, Liu F, Wang H. [A study on expression of CD44V6 and PCNA in squamous cell carcinomas]. [ZHONGHUA YAN KE ZA ZHI] CHINESE JOURNAL OF OPHTHALMOLOGY 2001; 37:451-4. [PMID: 11840756] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
OBJECTIVE To investigate the expression of cluster of differentiation 44 variant 6 (CD44V6) and proliferating cell nuclear antigen (PCNA) in squamous cell carcinomas (SCC) in eyes. METHOD Streptavidinbiotin peroxidase complex (SABC) immunohistochemical method was used to study the expression of CD44V6 and PCNA in 35 cases with squamous cell carcinoma in eyes, 20 cases with papilloma, 11 cases with normal eyelid tissue. RESULTS The CD44V6 positive rate was 62.9% (22/35) in squamous cell carcinomas in eyes, 15.0% (3/20) in papillomas, none in 11 cases with normal eyelid tissue. The positive expression rate of CD44V6 in the malignant group was significantly higher than that in the benign and control group, and the positive expression rate of CD44V6 in cases with metastasis was significantly higher than that without metastasis. PCNA labeling index (PI) in the CD44V6 positive expression of tumors was significantly higher than that in the CD44V6 negative expression of tumors (t = 20.21, P < 0.01). CONCLUSIONS The over-expression of CD44V6 is correlated with the progress and metastasis of SCC. CD44V6 protein expression is correlated positively with PCNA expression, and the evaluation of both CD44V6 and PCNA is useful for predicting the prognosis.
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Lee RW, Strommer J, Hodgins D, Shewen PE, Niu Y, Lo RY. Towards development of an edible vaccine against bovine pneumonic pasteurellosis using transgenic white clover expressing a Mannheimia haemolytica A1 leukotoxin 50 fusion protein. Infect Immun 2001; 69:5786-93. [PMID: 11500456 PMCID: PMC98696 DOI: 10.1128/iai.69.9.5786-5793.2001] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2001] [Accepted: 05/25/2001] [Indexed: 11/20/2022] Open
Abstract
Development of vaccines against bovine pneumonia pasteurellosis, or shipping fever, has focused mainly on Mannheimia haemolytica A1 leukotoxin (Lkt). In this study, the feasibility of expressing Lkt in a forage plant for use as an edible vaccine was investigated. Derivatives of the M. haemolytica Lkt in which the hydrophobic transmembrane domains were removed were made. Lkt66 retained its immunogenicity and was capable of eliciting an antibody response in rabbits that recognized and neutralized authentic Lkt. Genes encoding a shorter Lkt derivative, Lkt50, fused to a modified green fluorescent protein (mGFP5), were constructed for plant transformation. Constructs were screened by Western immunoblot analysis for their ability to express the fusion protein after agroinfiltration in tobacco. The fusion construct pBlkt50-mgfp5, which employs the cauliflower mosaic virus 35S promoter for transcription, was selected and introduced into white clover by Agrobacterium tumefaciens-mediated transformation. Transgenic lines of white clover were recovered, and expression of Lkt50-GFP was monitored and confirmed by laser confocal microscopy and Western immunoblot analysis. Lkt50-GFP was found to be stable in clover tissue after drying of the plant material at room temperature for 4 days. An extract containing Lkt50-GFP from white clover was able to induce an immune response in rabbits (via injection), and rabbit antisera recognized and neutralized authentic Lkt. This is the first demonstration of the expression of an M. haemolytica antigen in plants and paves the way for the development of transgenic plants expressing M. haemolytica antigens as an edible vaccine against bovine pneumonic pasteurellosis.
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MESH Headings
- Animals
- Antibodies, Bacterial/blood
- Bacterial Proteins
- Bacterial Vaccines
- Cattle
- Exotoxins/genetics
- Exotoxins/immunology
- Exotoxins/metabolism
- Fabaceae/genetics
- Fabaceae/immunology
- Fabaceae/metabolism
- Green Fluorescent Proteins
- Hemolysin Proteins/genetics
- Hemolysin Proteins/immunology
- Hemolysin Proteins/metabolism
- Immunization
- Luminescent Proteins/genetics
- Luminescent Proteins/metabolism
- Mannheimia haemolytica/immunology
- Mannheimia haemolytica/metabolism
- Pasteurellosis, Pneumonic/microbiology
- Pasteurellosis, Pneumonic/prevention & control
- Plants, Edible/genetics
- Plants, Edible/immunology
- Plants, Edible/metabolism
- Plants, Genetically Modified/genetics
- Plants, Genetically Modified/immunology
- Plants, Genetically Modified/metabolism
- Plants, Medicinal
- Rabbits
- Recombinant Fusion Proteins/immunology
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