201
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Ma W. Investigation of formation mechanisms of chips in orthogonal cutting process. EPJ WEB OF CONFERENCES 2012. [DOI: 10.1051/epjconf/20122604008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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202
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Tang YS, Wang D, Zhou C, Ma W, Zhang YQ, Liu B, Zhang S. Bacterial magnetic particles as a novel and efficient gene vaccine delivery system. Gene Ther 2011; 19:1187-95. [PMID: 22170341 PMCID: PMC3520014 DOI: 10.1038/gt.2011.197] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
DNA vaccination is an attractive approach for eliciting antigen-specific immunity. In this study, we used magnetosomes (bacterial magnetic particles, BMPs) as carriers of a recombinant DNA composed of a secondary lymphoid tissue chemokine, human papillomavirus type E7 (HPV-E7) and Ig-Fc fragment (pSLC-E7-Fc) to generate a gene vaccine (BMP-V) for tumour immunotherapy. The results indicate that BMPs linked to DNA more efficiently in phosphate-buffered saline (pH=4–5) than in physiological saline. Efficient transfection of BMP-V in vitro and in vivo was achieved when a 600-mT static magnetic field was applied for 10 min. In a mouse tumour model, subcutaneous injection of BMP-V (5 μg, × 3 at 4-day intervals) plus magnetic exposure elicited systemic HPV-E7-specific immunity leading to significant tumour inhibition. The treated mice tolerated BMP-V immunisation well with no toxic side effects, as shown by histopathological examinations of major internal organs. Taken together, these results suggest that BMP can be used as a gene carrier to elicit a systemic immune response.
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Xu N, Xu R, Ma W, Liang B. [Effectiveness analysis of Vertex rod-screw system in cervical expansive open-door laminoplasty]. ZHONGGUO XIU FU CHONG JIAN WAI KE ZA ZHI = ZHONGGUO XIUFU CHONGJIAN WAIKE ZAZHI = CHINESE JOURNAL OF REPARATIVE AND RECONSTRUCTIVE SURGERY 2011; 25:1440-1444. [PMID: 22242341] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
OBJECTIVE To evaluate the clinical application value and short-term results of Vertex rod-screw system in cervical expansive open-door laminoplasty. METHODS Between February 2008 and January 2010, 28 patients underwent Vertex rod-screw system fixation in cervical expansive open-door laminoplasty, including 15 cases of cervical spondylotic myelopathy, 5 cases of ossification of posterior longitudinal ligament, and 8 cases of cervical spondylosis with spinal stenosis. There were 16 males and 12 females, aged 42-77 years (mean, 61.3 years). The disease duration was 2 months to 11 years. The decompression range of cervical spine was from C3 to C7. The operation time, blood loss, Japanese Orthopedic Association (JOA) scores, and incidence of axial symptom were recorded. Pre- and postoperative curvature angles were demonstrated by the cross angle between posterior vertebral body margins of C2 and C7 on cervical X-ray films. The angle of the opened laminae was measured on CT scan at last follow-up. RESULTS The operation time was (142.5 +/- 22.8) minutes, and the blood loss was (288.2 +/- 55.1) mL. All incisions healed by first intention. All patients were followed up 14-25 months (mean, 22 months). CT showed that no reclosed open-laminae or loosening and breakage of rod-screw system occurred at 1 week and 1 year after operation. The axial bony fusion rate was 89.3% (25/28). The improvement rate of JOA scores at 1 week after operation (29.5% +/- 15.0%) was significantly smaller than that at 1 year after operation (64.9% +/- 28.1%) (t = 0.810, P = 0.000). No case presented with C5 nerve root palsy. The cervical curvature angle was (24.29 +/- 5.04) degrees before operation, was (23.89 +/- 3.57) degrees at 1 week, and was (23.41 +/- 3.35) degrees at 1 year after operation, showing no significant difference between pre- and postoperative angles (P > 0.05). The angle of the opened laminae was (27.90 +/- 4.74) degrees at 1 week after operation, and was (28.07 +/- 4.21) degrees at 1 year after operation, showing no significant difference (P > 0.05). CONCLUSION Vertex rod-screw system in cervical expansive open-door laminoplasty is effective in preventing reclosed open-laminae, which can reduce the loss of cervical curvature angle.
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Ge P, Ma C, Wang S, Gao L, Li X, Guo G, Ma W, Yan Y. Comparative proteomic analysis of grain development in two spring wheat varieties under drought stress. Anal Bioanal Chem 2011; 402:1297-313. [PMID: 22080421 DOI: 10.1007/s00216-011-5532-z] [Citation(s) in RCA: 114] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2011] [Revised: 10/03/2011] [Accepted: 10/23/2011] [Indexed: 12/24/2022]
Abstract
Two spring wheat varieties Ningchun 4 and Chinese Spring with good and poor resistance to abiotic stress, respectively, were used to investigate proteomic changes in the developing grains under drought stress by a comparative proteomics approach. A total of 152 protein spots showed at least twofold differences in abundance on two-dimensional electrophoresis (2-DE) maps, of which 28 and 68 protein spots were identified by MALDI-TOF and MALDI-TOF/TOF mass spectrometry, respectively. Of the 96 identified protein spots, six different expression patterns were found and they were involved in stress/defense/detoxification, carbohydrate metabolism, photosynthesis, nitrogen metabolism, storage proteins and some other important functions. Comparative proteomic analysis revealed that under the drought conditions the decreased degree of ascorbate peroxidases was more significant in Chinese Spring than in Ningchun 4 during grain development whereas translationally controlled tumor protein, which was significantly upregulated at 14 DAF, was present in Ningchun 4 and absent in Chinese Spring. The Rubisco large subunit displayed an upregulated expression pattern in Ningchun 4. In addition, two drought-tolerant proteins, triosephosphate isomerase and oxygen-evolving complex showed B and F type expression patterns in Chinese Spring, but D and B types in Ningchun 4, respectively. These differentially expressed proteins might be responsible for the stronger drought resistance of Ningchun 4 compared to Chinese Spring.
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Wang W, Zhong B, Sun J, Cao J, Tian J, Zhong N, Zhao W, Tian L, Xu P, Guo D, Ju X, Ma W, Li M, Hou W, Lu S. Down-regulated HS6ST2 in osteoarthritis and Kashin-Beck disease inhibits cell viability and influences expression of the genes relevant to aggrecan metabolism of human chondrocytes. Rheumatology (Oxford) 2011; 50:2176-86. [DOI: 10.1093/rheumatology/ker230] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Landgren O, Ma W, Kyle RA, Rajkumar SV, Korde N, Albitar M. Polymorphism of the erythropoietin gene promotor and the development of myelodysplastic syndromes subsequent to multiple myeloma. Leukemia 2011; 26:844-5. [PMID: 21926963 DOI: 10.1038/leu.2011.262] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Jin Y, Lin W, Huang S, Zhang C, Pu T, Ma W, Lin D. Dental abnormalities in eight captive giant pandas (Ailuropoda melanoleuca) in China. J Comp Pathol 2011; 146:357-64. [PMID: 21906751 DOI: 10.1016/j.jcpa.2011.08.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2010] [Revised: 07/09/2011] [Accepted: 08/07/2011] [Indexed: 10/17/2022]
Abstract
Dental data from eight adult giant pandas (Ailuropoda melanoleuca) (four females and four males) were collected at the Beijing Zoo from February 2009 to July 2010. Examination findings were recorded in dental charts. All the pandas had different degrees of tooth wear. Incisors, canines and second premolars had the most abnormalities. Five animals had caries; molars were the most affected. Chip fractures were found in seven teeth (incisor, canine and premolar) of five pandas; two had complicated fractures of their canines. Premolars and other teeth were missing in three pandas. Different degrees of dental plaque and calculus were found in all animals. Two pandas had mild gingivitis; the depth of periodontal pockets in all pandas was normal (0-2 mm). Five pandas had abnormal tooth mobility. Samples of dental plaque were collected for microbial culture. Two hundred and fifty-three bacterial strains belonging to 48 species of 23 genera were isolated. Streptococcus, Moraxella, Peptostreptococcus and Porphyromonas were the dominant genera. Further research with larger sample sizes of free-ranging and captive giant pandas will be required in order to demonstrate the absence of the premolar tooth, tooth fractures and the relatively low prevalence of periodontal disease in captive giant pandas.
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Ma W, Lin Y, Xuan W, Iversen PL, Smith LJ, Benchimol S. Inhibition of p53 expression by peptide-conjugated phosphorodiamidate morpholino oligomers sensitizes human cancer cells to chemotherapeutic drugs. Oncogene 2011; 31:1024-33. [PMID: 21765469 DOI: 10.1038/onc.2011.300] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The p53 tumor suppressor gene encodes a transcription factor that is commonly mutated in cancer. Tumors arise when premalignant cells are unable to undergo p53-dependent apoptosis, cell cycle arrest or DNA repair. The p53-signaling pathway affects not only tumor development, but also the response of tumors to chemotherapeutic drugs. In this study, we use cell penetrating peptide conjugates of phosphorodiamidate morpholino oligomers (PPMOs) to inhibit p53 expression. We examine the functional properties of endogenous p53 isoforms that are produced upon PPMO-mediated inhibition of p53 translation and splicing, and report that loss of N-terminal or C-terminal sequences interferes with the transcriptional activity of p53. Importantly, we report that PPMO-mediated inhibition of p53 expression sensitizes human cancer cells with wild-type p53 to chemotherapeutic drugs.
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Gao L, Yan X, Li X, Guo G, Hu Y, Ma W, Yan Y. Proteome analysis of wheat leaf under salt stress by two-dimensional difference gel electrophoresis (2D-DIGE). PHYTOCHEMISTRY 2011; 72:1180-1191. [PMID: 21257186 DOI: 10.1016/j.phytochem.2010.12.008] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2010] [Revised: 11/15/2010] [Accepted: 12/06/2010] [Indexed: 05/30/2023]
Abstract
Salt stress is a major abiotic stress that limits agricultural productivity in many regions of the world. To understand the molecular basis of the salt stress response in wheat (Triticum aestivum L.), a proteomic approach was used to identify the salt stress-responsive proteins in an elite Chinese wheat cultivar, Zhengmai 9023, which exhibits a high yield, superior gluten quality and better biotic resistance. Three-week-old seedlings were treated with NaCl of four different concentrations (1.0%, 1.5%, 2.0%, and 2.5%). The total proteins from the leaves of untreated and NaCl-treated plants were extracted and separated by two-dimensional difference gel electrophoresis (2D-DIGE). A total of 2358 protein spots were detected on the gels, among which 125 spots showed a significant change in protein abundance, and 83 differentially expressed spots were localised on preparative gels. Using Q-TOF mass spectrometry, 52 salt-responsive spots were identified, which were classified into six functional categories that included transport-associated proteins, detoxifying enzymes, ATP synthase, carbon metabolism, protein folding, and proteins with unknown biological functions. Of the 52 differentially expressed proteins, 26 were up-regulated, 21 were down-regulated, and five spots showed multi-expression patterns. In particular, some important proteins for salt tolerance were found to be up-regulated in Zhengmai 9023 under salt stress, such as H(+)-ATPases, glutathione S-transferase, ferritin and triosephosphate isomerase.
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Wang F, Sims JT, Ma L, Ma W, Dou Z, Zhang F. The phosphorus footprint of China's food chain: implications for food security, natural resource management, and environmental quality. JOURNAL OF ENVIRONMENTAL QUALITY 2011; 40:1081-9. [PMID: 21712576 DOI: 10.2134/jeq2010.0444] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Efficient use of phosphorus (P) for producing food, preventing water pollution, and managing a dwindling rock P reserve are major challenges for China. We analyzed P stocks and flows in the Chinese food chain to identify where P use efficiency can be improved, where P leaks to the environment, and the research, technologies, and policies needed to improve P use. We found a high degree of inefficiency; of 6652 Gg P entering the food chain, only 1102 Gg P (18%) exit as food for humans. The greatest inefficiencies were a large build-up of soil P (3670 Gg P yr; 52% of P inputs) and high P losses to the environment from animal production (1582 Gg P yr; 60% of excreted P). Improving P use in China must focus on national-scale nutrient management strategies, better animal nutrition, and adoption of technologies and policies to reduce P discharges from the animal sector and recycle P as manures in agriculture.
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Ma W, Xie D, Chen D, Yang Q, Jiang Z, Zhang Y, Zhou S. Preliminary in vitro study of MUC1-ETR/pDC316 vector-mediated specific MR imaging of pancreatic cancer. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.e14517] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Grisham RN, Adaniel CH, Hyman DM, Ma W, Iasonos A, Aghajanian C, Konner JA. Gemcitabine for advanced endometrial carcinoma (EMC): A review of the MSKCC experience. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.5098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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213
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Ma W, Lager KM, Vincent AL, Janke BH, Gramer MR, Richt JA. The role of swine in the generation of novel influenza viruses. Zoonoses Public Health 2011; 56:326-37. [PMID: 19486316 DOI: 10.1111/j.1863-2378.2008.01217.x] [Citation(s) in RCA: 136] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The ecology of influenza A viruses is very complicated involving multiple host species and viral genes. Avian species have variable susceptibility to influenza A viruses with wild aquatic birds being the reservoir for this group of pathogens. Occasionally, influenza A viruses are transmitted to mammals from avian species, which can lead to the development of human pandemic strains by direct or indirect transmission to man. Because swine are also susceptible to infection with avian and human influenza viruses, genetic reassortment between these viruses and/or swine influenza viruses can occur. The potential to generate novel influenza viruses has resulted in swine being labelled 'mixing vessels'. The mixing vessel theory is one mechanism by which unique viruses can be transmitted from an avian reservoir to man. Although swine can generate novel influenza viruses capable of infecting man, at present, it is difficult to predict which viruses, if any, will cause a human pandemic. Clearly, the ecology of influenza A viruses is dynamic and can impact human health, companion animals, as well as the health of livestock and poultry for production of valuable protein commodities. For these reasons, influenza is, and will continue to be, a serious threat to the wellbeing of mankind.
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Sun DM, Hu WN, Ma W. Simultaneous electrochemical detection of uric acid and ascorbic acid at a silver doped poly(glutamic acid) modified glassy carbon electrode. JOURNAL OF ANALYTICAL CHEMISTRY 2011. [DOI: 10.1134/s1061934811030063] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Ma W, Liu J, Zeng Y, Chen S, Zheng Y, Ye S, Lan L, Liu Q, Weig HJ, Liu Q. Causes of moderate to large pericardial effusion requiring pericardiocentesis in 140 Han Chinese patients. Herz 2011; 37:183-7. [PMID: 21301790 DOI: 10.1007/s00059-011-3428-5] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2010] [Revised: 11/15/2010] [Accepted: 01/11/2011] [Indexed: 11/27/2022]
Abstract
BACKGROUND Causes of pericardial effusion requiring pericardiocentesis are very complex; a summary of 140 patients, especially those having iatrogenic pericardial effusion, is rare. METHODS We prospectively analyzed the clinical data and etiology of moderate to large pericardial effusion requiring pericardiocentesis and drainage in 140 consecutive Han Chinese patients from January 2007 to December 2009. RESULTS Pericardiocentesis was successfully performed and effective in all patients. There were 9 cases with transudates, while the remaining 131 cases were diagnosed with exudates (neoplastic in 54 patients, tuberculous in 40 patients, 9 cases of connective tissue diseases, 12 cases undergoing cardiac catheterization, and 8 cases of acute myocardial infarction). Among the 54 malignancies, 30 patients had lung cancer, 7 had breast cancer, and 4 had liver cancer. No differences in the clinical characteristics and the results of routine and biochemistry studies in the pericardial fluid between tuberculous and malignant groups were found. Of the 12 patients undergoing cardiac catheterization, 6 cases had undergone catheter ablation for tachycardia and 4 cases had undergone percutaneous coronary intervention. The 6 patients undergoing catheter ablation were women and the ratio of pericardial effusion was higher in women (6/436) than in men (0/462; p<0.05). Pericardiocentesis and drainage was effective in the 6 patients who underwent catheter ablation, and the remaining 6 patients underwent surgical intervention after pericardiocentesis and drainage. All 8 patients with acute myocardial infarction died during hospitalization. CONCLUSION In China, most moderate to large pericardial effusions requiring pericardiocentesis and drainage were exudates and bloody, which were mainly caused by malignancy and tuberculosis. However, the incidence of iatrogenic pericardial effusion has been increasing and should not be ignored. Pericardiocentesis and drainage were effective.
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He S, Li T, Chen H, Ma W, Yao Q, Yang H, Wang H, Wang F, Zhao C, Yang P. CD14+ cell-derived IL-29 modulates proinflammatory cytokine production in patients with allergic airway inflammation. Allergy 2011; 66:238-46. [PMID: 20726961 DOI: 10.1111/j.1398-9995.2010.02455.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
BACKGROUND Interleukin (IL)-29 is a newly described cytokine that has anti-viral activity, induces tumor cell death and regulates immune function. Whether it plays a role in immune disorders is unclear. This study aims to examine the role of IL-29 in the modulation of immune response under allergic environment. METHODS A group of patients with allergic asthma or/and allergic rhinitis was recruited to this study. Serum samples were collected from the patients in both in-season and out-season; the serum levels of IL-29 were determined by enzyme-linked immunoassay. Cell types of IL-29-producing cells in upper airway mucosa were identified with immune staining and examined by immunohistochemistry and flow cytometry. RESULTS High serum levels of IL-29 were detected in patients with allergic asthma in in-season, but not in out-season. The majority of IL-29(+) cells in upper airway tissue were CD14(+) cells. Exposure to specific antigens triggered the release of IL-4 from antigen-specific CD4(+) T cells; the released IL-4 activated CD14(+) cells to release IL-29; the released IL-29 further triggered the release of IL-6 and tumor necrosis factor from CD4(+) T cells. CONCLUSIONS Interleukin-29 is involved in the pathogenesis of allergic inflammation via modulating immune cells' function to release proinflammatory cytokines.
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Ma W, Giles F, Zhang X, Wang X, Zhang Z, Lee TS, Yeh CH, Albitar M. Three novel alternative splicing mutations in BCR-ABL1 detected in CML patients with resistance to kinase inhibitors. Int J Lab Hematol 2011; 33:326-31. [PMID: 21266020 DOI: 10.1111/j.1751-553x.2010.01291.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
INTRODUCTION Multiple types of mutations in the BCR-ABL1 kinase domain have been reported. We previously reported a common alternatively spliced BCR-ABL mRNA with a 35-nucleotide insertion (35INS). We report three novel alternative splicing mutants expressed as the dominant transcripts in patient with chronic myelogenous leukemia and resistance to kinase inhibitors. METHODS We screened RNA from more than 200 patients with resistance to more than one of the three kinase inhibitors for ABL1 kinase domain mutations by direct sequencing. RESULTS We found three not previously described splice mutants. All three showed >90% mutant transcript. The first resulted from the insertion of 79 nucleotides into the ABL1 exon 8-9 junction. The inserted sequence contained a sequence from regions of intron 8, located 120 bp apart: the 35-nucleotide sequence previously described, and an additional 44-nucleotide segment downstream from 35INS. The combined 79-nucleotide insertion splice mutant showed the same protein change as 35INS (p C475YfsX11). The second splice mutation comprised an 84-nucleotide sequence from intron 7 inserted into the ABL1 exon7-8 junction, also causing a frameshift and protein truncation (p A424EfsX18). The third splice derived from a 231-nucleotide sequence from intron 4 retained in the ABL1 exon 4-5 junction adding 40 intron-encoded amino acids and leading to a frameshift and early termination (p E275LfsX41). CONCLUSION These findings, when combined with the data on 35INS, support the concept that loss of the C-terminus of BCR-ABL1 is associated with significant resistance to kinase inhibitors; this mechanism appears to be a major source of resistance to kinase inhibitors.
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Thirolf P, Habs D, Gross M, Allinger K, Bin J, Henig A, Kiefer D, Ma W, Schreiber J. Laser Ion Acceleration: Status and Perspectives for Fusion. EPJ WEB OF CONFERENCES 2011. [DOI: 10.1051/epjconf/20111711001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Liu G, Xu R, Ma W, Sun S, Feng J. Anatomical considerations for the placement of cervical transarticular screws. J Neurosurg Spine 2011; 14:114-21. [DOI: 10.3171/2010.9.spine1066] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Object
The object of this study was to determine the safe screw placement technique for cervical transarticular screw fixation.
Methods
Twenty cadaveric adult cervical spines were studied. All soft tissues surrounding the cervical spinal nerves from C-2 to T-1 were dissected carefully to expose the lateral mass, facet joint, transverse process, vertebral artery (VA), and spinal nerves (ventral and dorsal rami). After the proper entrance and exit points for the transarticular screws were determined, posterior transarticular screw implantation was performed under direct visualization from C2–3 to C5–6. A CT scan was performed to check the screw placement. The angle and length of the transarticular screw trajectory, the distance between the tip of the screw and the VA, and the sagittal safety angle were measured on the CT scan. Statistical analysis was performed using ANOVA (p < 0.05). Sagittal and axial orientations of transarticular screws were carefully analyzed.
Results
There was no nerve or artery impingement or penetration. The average caudal angle of the screws in the sagittal plane was 37.3° ± 5.0° and the lateral angle in the axial plane was 16.6° ± 4.6°. The average distance between the tip of the screw and the VA (the posterior border of the VA foramen) was 5.8 ± 1.5 mm. The average sagittal safety angle was 41.9° ± 5.6°. No difference was observed according to the vertebral level. The average bone purchase was 18.7 ± 1.4 mm. Bone purchase was significantly greater at C2–3 (23.2 ± 1.6 mm) than at C3–4 through C5–6 (17.2 ± 1.3 mm, p < 0.05).
Conclusions
This study establishes anatomical guidelines to allow for safe cervical transarticular screw insertion. The starting point of transarticular screws should be 1 mm medial to the midpoint of the lateral mass. The “ideal” drilling angle is approximately 37° in the inferior direction and 16° in the lateral direction for the C2–3 through the C5–6 levels. The screw should be directed as laterally as possible in the axial plane without causing the lateral mass to fracture and as caudally as the occipital bone permits in the sagittal plane. The ideal screw size would be 3.5 mm in diameter and 18 mm in length.
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MacDonald R, Debiais‐Thibaud M, Ma W, Yu M, Talbot J, Ekker M. [P1.37]: Function and regulation of
Dlx
homeobox genes during zebrafish GABAergic interneuron development. Int J Dev Neurosci 2010. [DOI: 10.1016/j.ijdevneu.2010.07.078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Malik N, Chandrasekhar R, Salerno May K, Ma W, Flaherty L, Iyer R, Kuvshinoff B, Gibbs J, Wilding G, Yang G. Chemoradiotherapy vs. Chemotherapy Alone in Patients with Locally Advanced Unresectable Pancreatic Carcinoma: A 10-year Experience. Int J Radiat Oncol Biol Phys 2010. [DOI: 10.1016/j.ijrobp.2010.07.739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Yang G, Malik N, Chandrasekhar R, Salerno May K, Watroba N, Flaherty L, Ma W, Kuvshinoff B, Wilding G, Gibbs J. Change in CA 19-9 Levels after Chemoradiotherapy Predicts Survival in Patients with Locally Advanced Unresectable Pancreatic Cancer. Int J Radiat Oncol Biol Phys 2010. [DOI: 10.1016/j.ijrobp.2010.07.709] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Wang MJ, Zhang Y, Lin ZS, Ye XG, Yuan YP, Ma W, Xin ZY. Development of EST-PCR markers for Thinopyrum intermedium chromosome 2Ai#2 and their application in characterization of novel wheat-grass recombinants. TAG. THEORETICAL AND APPLIED GENETICS. THEORETISCHE UND ANGEWANDTE GENETIK 2010; 121:1369-1380. [PMID: 20585749 DOI: 10.1007/s00122-010-1394-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2010] [Accepted: 06/14/2010] [Indexed: 05/29/2023]
Abstract
A series of expressed sequence tags-derived polymerase chain reaction (EST-PCR) markers specific to chromosome 2Ai#2 from Thinopyrum intermedium were developed in this study using a new integrative approach. The target alien chromosome confers high resistance to barley yellow dwarf virus (BYDV), which is a severe virus disease in wheat. To generate markers evenly distributed on 2Ai#2, a total of 105 primer pairs were designed based on mapped ESTs from 8 bins of wheat chromosome 2B with intron-prediction by aligning ESTs with genomic sequences of the new model plant Brachypodium distachyon. Eight and seven polymorphic markers on the short arm and the long arm of chromosome 2Ai#2, respectively, were obtained with a polymorphism rate of 14.3%. These chromosome 2Ai#2-specific EST-PCR markers were then used in tracing and exploring the structural variation of the alien chromosome in the population derived from the immature embryo culture of the cross between N452, a 2Ai#2(2D) substitution line, and common wheat CB037. Two centric fusion of translocations involving 2Ai#2 short or long arm with wheat chromosome 2D and some new genetic stocks including telosomes with the alien chromosome short or long arm were identified in the SC(3) generations, which provided basic materials to further study the mechanism of the BYDV resistance. BYDV tests in two field seasons suggest that the BYDV resistance was mainly conferred by the short arm, gene interaction on both arms of the alien chromosome was discussed.
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Spicer J, Guo Y, Liu H, Hirsch J, Zhao H, Ma W, Holzemer W. Collaborative nursing leadership project in the People's Republic of China. Int Nurs Rev 2010; 57:180-7. [DOI: 10.1111/j.1466-7657.2009.00769.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Calvo E, Ma W, Tolcher AW, Hidalgo M, Soria J, Bahleda R, Gualberto A, Denis LJ, Millham RD, Adjei AA. Phase (P) I study of PF-00299804 (PF) combined with figitumumab (FI; CP-751,871) in patients (pts) with advanced solid tumors (ASTs). J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.3026] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Cohen SJ, Zalupski MM, Conkling P, Nugent FW, Ma W, Modiano M, Pascual RA, Lee F, Wong L, Hersh E. A phase II randomized double blind multicenter trial of gemcitabine (Gem) plus imexon (IMX) versus Gem plus placebo (P) in patients with chemotherapy-naïve pancreatic adenocarcinoma (PC). J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.4076] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Ma W, Mani S, Freas E, Dy GK, Ghalib MH, Messersmith WA, Bellemarre S, Wilhelm F, Adjei AA, Jimeno A. Rational combination of a novel cell cycle inhibitor ON01910.Na with gemcitabine in patients with advanced solid tumors. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.e13515] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Adjei AA, Sosman JA, Dy GK, Ma W, Fetterly GJ, Skupien D, Means JA, Savage R, Chai F, Puzanov I. A phase I dose-escalation trial evaluating ARQ 197 administered in combination with sorafenib in adult patients (pts) with advanced solid tumors. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.3024] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Sun Q, Wang K, She R, Ma W, Peng F, Jin H. Swine intestine antimicrobial peptides inhibit infectious bronchitis virus infectivity in chick embryos. Poult Sci 2010; 89:464-9. [PMID: 20181861 PMCID: PMC7107070 DOI: 10.3382/ps.2009-00461] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Infectious bronchitis virus (IBV), the causative agent of infectious bronchitis, results in respiratory disease, nephritis, and poor egg production and quality in chicken. Antimicrobial peptides possess potent antimicrobial activities and are regarded as promising therapeutic alternatives in the fight against microorganisms. To assess the in vitro antiviral activity of swine intestine antimicrobial peptides (SIAMP) against IBV, 45 chick embryos were randomly assigned into 3 groups, 15 for each group. Embryos in group 1 were inoculated with IBV. Group 2 was inoculated with SIAMP-IBV intermixture. Group 3 was used as a control and inoculated with sterile PBS. Allantoic fluid was collected for hemagglutination titer assay. In addition, weight gain, mortality, and pathological changes for each group were recorded. The results showed that no distinct pathological changes were found in chick embryos after they were inoculated with SIAMP-IBV intermixture and the mortality was reduced remarkably compared with the IBV-infected group. Weight gain of embryos in the SIAMP-IBV intermixture group was significantly higher than the IBV-infected embryos (P < 0.01), which was also higher than the control group (P < 0.05). Furthermore, the hemagglutination titer in the SIAMP-IBV group was significantly lower than that in the IBV-infected group (P < 0.01). These results indicated that SIAMP can inhibit virus replication and reduce tissue injury caused by IBV.
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Louis L, Gemeiner P, Ponomareva I, Bellaiche L, Geneste G, Ma W, Setter N, Dkhil B. Low-symmetry phases in ferroelectric nanowires. NANO LETTERS 2010; 10:1177-1183. [PMID: 20230042 DOI: 10.1021/nl9034708] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Ferroelectric nanostructures have recently attracted much attention due to the quest of miniaturizing devices and discovering novel phenomena. In particular, studies conducted on two-dimensional and zero-dimensional ferroelectrics have revealed original properties and their dependences on mechanical and electrical boundary conditions. Meanwhile, researches aimed at discovering and understanding properties of one-dimensional ferroelectric nanostructures are scarce. The determination of the structural phase and of the direction of the polarization in one-dimensional ferroelectrics is of technological importance, since, e.g., a low-symmetry phase in which the polarization lies away from a highly symmetric direction typically generates phenomenal dielectric and electromechanical responses. Here, we investigate the phase transition sequence of nanowires made of KNbO(3) and BaTiO(3) perovskites, by combining X-ray diffraction, Raman spectroscopy, and first-principles-based calculations. We provide evidence of a previously unreported ferroelectric ground state of monoclinic symmetry and the tuning of the polarization's direction by varying factors inherent to the nanoscale.
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Wang R, Ma W, Tian L, Sun L, Chang Q. Valve-Sparing Operation for Aortic Root Aneurysm in Patients with Marfan Syndrome. Thorac Cardiovasc Surg 2010; 58:76-80. [DOI: 10.1055/s-0029-1186277] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Ma W, Kantarjian H, Zhang X, Yeh CH, Zhang ZJ, Verstovsek S, O'Brien S, Giles F, Albitar M. Plasma levels of JAK2 mRNA in patients with chronic myeloproliferative diseases with and without V617F mutation: implications for prognosis and disease biology. Int J Lab Hematol 2010; 32:95-102. [PMID: 19254349 DOI: 10.1111/j.1751-553x.2009.01140.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
The association of V617F JAK2 expression levels with disease behavior has not been studied in patients with nonchronic myelogenous leukemia (CML) myeloproliferative disease (MPD). We found plasma levels of total JAK2 mRNA to be higher in patients with non-CML MPD (n=175) than in CML patients (n=45) and normal controls (n=58) (each P<0.001). Overall survival was studied in 68 patients and showed positive correlation with levels of total and mutant JAK2 mRNA in patients with the V617F mutation, but not those without the mutation. These findings suggest that total JAK2 expression levels play a role in the biology of the disease in V617F-positive patients, and a therapy aiming at downmodulating the expression of the total JAK2 mRNA should be considered. In conclusion, we studied JAK2 total and V6217F mutant mRNA levels in plasma. We show high levels of JAK2 expression in MPD patients and these levels correlate with survival.
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Ma W, Li X, Dennehy TJ, Lei C, Wang M, Degain BA, Nichols RL. Pyriproxyfen resistance of Bemisia tabaci (Homoptera: Aleyrodidae) biotype B: metabolic mechanism. JOURNAL OF ECONOMIC ENTOMOLOGY 2010; 103:158-165. [PMID: 20214381 DOI: 10.1603/ec09122] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Juvenile hormone (JH) analog insecticides are relatively nontoxic to vertebrates and provide efficient control of key arthropod pests. One JH analog, pyriproxyfen, has provided over a decade of exceptional management of whiteflies in cotton of the southwestern United States. Thwarting resistance to pyriproxyfen in Bemisia tabaci (Gannadius) (a.k.a. Bemisia argentifolii Bellows and Perring) has been the focus of an integrated resistance management program because this insecticide was first registered for use in Arizona cotton in 1996. Resistance levels have increased slowly in field populations in recent years but have not demonstrably affected field performance of pyriproxyfen. Resistant strains have been isolated and studied in the laboratory to determine the mechanism of resistance and identify optimal strategies for controlling resistant whiteflies. Synergism bioassays showed that resistance in a laboratory-selected strain QC02-R, was partially suppressible with piperonyl butoxid (PBO) and diethyl maleate (DEM) but not with S, S, S-tributyl phosphorotrithioate (DEF). Consistent with the synergism bioassay results, enzymatic assays revealed that the enzyme activities of cytochrome P450 monooxygenases (P450) and glutathione S-transferases (GST) but not esterases were significantly higher in the pyriproxyfen-resistant QC02-R strain than in the susceptible strain. These results indicate that both P450 and GST are involved in whitefly resistance to pyriproxyfen.
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Cohen SB, Ma W, Valova VA, Algie M, Harfoot R, Woolley AG, Robinson PJ, Braithwaite AW. Genotoxic stress-induced nuclear localization of oncoprotein YB-1 in the absence of proteolytic processing. Oncogene 2009; 29:403-10. [PMID: 19838214 DOI: 10.1038/onc.2009.321] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Y-box-binding protein 1 (YB-1) is an oncogenic transcription factor whose overexpression and nuclear localization is associated with tumor progression and drug resistance. Transcriptional activation of YB-1 in response to genotoxic stress is believed to occur in the cytoplasm through sequence-specific endoproteolytic cleavage by the 20S Proteasome, followed by nuclear translocation of cleaved YB-1. To study the proteolysis model, we developed a two-step affinity purification of endogenous YB-1 protein species and characterized the products using mass spectrometry. Whereas full-length YB-1 was readily identified, the smaller protein band thought to be activated YB-1 was identified as hnRNP A1. An antibody specific for YB-1 was generated, which revealed only one YB-1 species, even after genotoxic stress-induced nuclear YB-1 translocation. These findings warrant re-evaluation of the mechanism of YB-1 nuclear translocation and transcriptional activation. The relationship between nuclear YB-1 and tumor progression may also have to re-evaluated in some cases.
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Iyer R, Khushalani N, Tan W, Litwin A, LeVea C, Hutson A, Tucker C, Ma W, Fakih M, Adjei A. 6603 A phase II study of erlotinib in patients (pts) with advanced pancreatic cancer (APC) who are refractory to gemcitabine (G). EJC Suppl 2009. [DOI: 10.1016/s1359-6349(09)71324-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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Sun W, Zhao G, Song E, Wan F, Liu X, Ma W. The effect of feeding soyabeans with different particle size on the content of conjugated linoleic acid and other fatty acids of longissimus dorsi muscle, backfat and liver of beef cattle. JOURNAL OF ANIMAL AND FEED SCIENCES 2009. [DOI: 10.22358/jafs/66406/2009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Guo Z, Li Y, Gong X, Yao C, Ma W, Wang D, Li Y, Zhu J, Zhang M, Yang D, Wang J. Edge-based scoring and searching method for identifying condition-responsive protein-protein interaction sub-network. Bioinformatics 2009. [DOI: 10.1093/bioinformatics/btp308] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Yeh C, Ma W, Kantarjian H, Zhang ZJ, Cortes J, Albitar M. BCR-ABL truncation due to premature translation termination as a mechanism of resistance to kinase inhibitors. J Clin Oncol 2009. [DOI: 10.1200/jco.2009.27.15_suppl.7028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
7028 Background: The major mechanism underlying imatinib resistance in patients with chronic myeloid leukemia (CML) is clonal expansion of leukemic cells with point mutations in the BCR-ABL tyrosine kinase. We describe three novel ABL premature termination mutations leading to BCR-ABL truncation in leukemia patients with multidrug (imatinib/nilotinib/dasatinib) resistance. Methods: Peripheral blood or bone marrow samples from drug-resistant CML patients were collected. Total nucleic acids were purified and subjected to two rounds of PCR analysis, with the first PCR designed to eliminate amplification of the wild-type, non-translocated ABL gene. Bi-directional sequencing was then performed. HL60 cells (a Ph-negative myeloid leukemia cell line) and peripheral blood of healthy subjects were used as negative controls; a human CML cell line (K562) was used as a positive control. Results: We identified an exon 7 deletion in three CML patients, a 4-nt insertion (908insCAGG) near the exon 5/6 junction in one CML case, and an exon 6 point mutation (997C>T) in one patient with acute lymphoblastic leukemia (ALL). These mutations all create premature stop codons and cause termination at residues 381, 315, and 333, respectively, leading to truncated proteins with only the first quarter of the kinase domain (P-loop) or lacking the C-terminus of ABL including the A-loop. Conclusions: These novel mutations, and the previously documented 35-nt insertion in exon 8, may constitute a new class of mutations that 1) cause truncation of the BCR-ABL kinase; (2) abolish the regulatory element in the ABL kinase domain and the downstream C-terminal region; and (3) confer significant drug resistance. [Table: see text]
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Bruey J, Kantarjian H, Ma W, Yeh C, Peralta R, Lee T, O'Brien S, Estrov Z, Cortes J, Albitar M. Alternatively spliced truncated BCR-ABL1 protein in CML patients with resistance to kinase inhibitors. J Clin Oncol 2009. [DOI: 10.1200/jco.2009.27.15_suppl.7026] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
7026 Background: We have reported that some patients with imatinib-resistant chronic myeloid leukemia (CML) express an alternatively spliced BCR-ABL mRNA with a 35-bp insertion (BCR-ABL135INS), resulting in the addition of 10 residues and truncation of 653 residues. Molecular dynamic simulation suggested that this truncation and insertion of new 10 AA results in structural changes similar to those seen in BCR-ABL with T315I mutation. Here we evaluate the prevalence of BCR-ABL135INS in imatinib-resistant CML, examine the effect of this mutation on resistance to compared the efficiency of various kinase inhibitors in vitro, and suggest a model for persistent CML and a possible strategy to eradicate residual disease. Methods: Using a sensitive PCR method, we determined the prevalence of the alternatively spliced BCR-ABL135INS mRNA in 288 patients with chronic-phase CML resistant to imatinib. Expression of truncated protein was confirmed by Western blot. We then tested the effectiveness of various kinase inhibitors on human K562 CML cells expressing different levels of BCR-ABL135INS along with wild-type BCR-ABL1. Results: BCR-ABL135INS mRNA was detected in 210 (73%) of the 288 patients. Only 25% of BCR-ABL135INS positive cases showed coexistance of ABL1 kinase point mutation. Immunoprecipitation studies demonstrated that expression of the predicted 143-kD BCR-ABL135INS protein at levels proportional to those predicted by mRNA. Expression of BCR-ABL135INS in K562 cells was sufficient to conferred resistance to imatinib, dasatinib, and nilotinib in a dose-dependant fashion. However, no resistance was detected using aurora kinase inhibitor (MK 0457) or homoharringtonine (HHT). BCR-ABL135INS suppressed imatinib, nilotinib, and dasatinib-mediated dephosphorylation of CRKL, LYN, SRC, and STAT5, but had no effect on MK 0457-mediated dephosphorylation. The combination of imatinib with nilotinib or HHT showed strong synergy, overcoming BCR-ABL135INS-induced resistance in vitro. Conclusions: These findings emphasize the importance of the overlooked alternatively spliced BCR-ABL135INS protein and may provide a strategy to treat resistant disease and eradicate residual CML. No significant financial relationships to disclose.
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Liu X, Ma W, Surprenant A, Jiang LH. Identification of the amino acid residues in the extracellular domain of rat P2X(7) receptor involved in functional inhibition by acidic pH. Br J Pharmacol 2009; 156:135-42. [PMID: 19068080 DOI: 10.1111/j.1476-5381.2008.00002.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND AND PURPOSE P2X(7), receptors are potently inhibited by extracellular acidification. The underlying molecular basis remains unknown. This study aimed to examine the role of extracellular histidine, lysine, aspartic acid and glutamic acid residues in the functional inhibition of rat P2X(7) receptors by acidic pH. EXPERIMENTAL APPROACH We introduced point mutations into rat P2X(7) receptor by site-directed mutagenesis, expressed wild type (WT) and mutant receptors in human embryonic kidney (HEK293) cells and, using patch clamp recording, characterized the effects of acidic pH on BzATP [2'-3'O-(4-benzoylbenzoyl) adenosine 5'-triphosphate]-evoked ionic currents. KEY RESULTS Reducing extracellular pH, that is, increasing extracellular proton concentrations, inhibited BzATP-evoked currents in cells expressing WT P2X(7) receptors, with IC(50) value (half-maximal antagonist or inhibitor concentration) for protons of 0.2 mumol.L(-1). The major effect of acidification was suppression of the maximal current response without altering the agonist sensitivity. five residues in the receptor extracellular domain (His(85), Lys(110), Lys(137), Asp(197) and His(219)) were mutated to alanine and current inhibition by protons assessed. Compared with WT, the H85A, H219A, K137A mutants were two- to threefold more sensitive, whereas the K110A and D197A mutants were 2.5- and 9-fold less sensitive. Double-alanine substitution of Lys(110) and Asp(197) resulted in 23-fold decreased sensitivity to inhibition by protons. Furthermore, charge neutralization (K110M, K110F, D197N and D197F), but not charge conserving mutation (K110R and D197E), attenuated the inhibition of currents by protons. CONCLUSIONS AND IMPLICATIONS Functional inhibition of rat P2X(7) receptors by acidic pH was variably affected by the extra-cellular His(85), Lys(110), Lys(137), Asp(197) and His(219) residues, with the Asp(197) residue being most critical for this inhibition.
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Hu Y, Ma W, Xu R. Transoral osteosynthesis C1 as a function-preserving option in the treatment of bipartite atlas deformity: a case report. Spine (Phila Pa 1976) 2009; 34:E418-21. [PMID: 19444056 DOI: 10.1097/brs.0b013e3181a0ff2f] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
STUDY DESIGN A case report about transoral osteosynthesis C1 as a function-preserving option in the treatment of bipartite atlas deformity. OBJECTIVE To illustrate a new method, which preserves the function of the C1-C2 joint in young patients. SUMMARY OF BACKGROUND DATA To the authors' knowledge, bipartite atlas deformity are usually treated conservatively by immobilization or traction or surgically by posterior fusion C1-C2. METHODS A 20-year-old man, who complained about occipitocervical pain and cervical activities limitation, and presented with a 3-month history of weakness and numbness of all 4 limbs after sustaining a minor head trauma. Computed tomography scan showed anterior arch midline defect, posterior arch midline aplasia. Steel plate fixation by transoral approach was performed to repair bipartite atlas deformity. RESULTS In 1-month follow-up, occipitocervical pain disappeared. The patient had significant improvement over next 3 months. In 6-month follow-up, we observed bony union of anterior arch of atlas without abnormal manifestations. The postoperative rotation in the atlantoaxial joint was returned to normal. The patient had no symptoms of postoperative instability of C1-C2. CONCLUSION We described a rare association of an anterior arch midline defect, posterior arch midline aplasia. The natural history of patients with bipartite atlas deformity suggests that these people have a potentially precarious existence. Transoral osteosynthesis of the anterior ring and the lateral masses of C1 is a new technique that allows maintenance of rotatory mobility in the C1-C2 joint and restoration of congruency in the atlanto-occipital and atlantoaxial joints.
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Wang D, Ma W, She R, Sun Q, Liu Y, Hu Y, Liu L, Yang Y, Peng K. Effects of swine gut antimicrobial peptides on the intestinal mucosal immunity in specific-pathogen-free chickens. Poult Sci 2009; 88:967-74. [DOI: 10.3382/ps.2008-00533] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
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Cao J, Xu R, Zhou L, Zhong Z, Ma W, Li M. [Experimental study of cervical pedicle screw locator system]. ZHONGGUO XIU FU CHONG JIAN WAI KE ZA ZHI = ZHONGGUO XIUFU CHONGJIAN WAIKE ZAZHI = CHINESE JOURNAL OF REPARATIVE AND RECONSTRUCTIVE SURGERY 2009; 23:393-395. [PMID: 19431971] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
OBJECTIVE To develop a high-accuracy, better-safety and low-cost cervical pedicle locator system for guiding cervical pedicle screw placement. METHODS Cervical pedicle screw locator system was made of stainless steel. Ten cervical specimens from voluntary donation were divided into two groups according to compatibility design: control group in which 60 screws were planted into C(2-7) by free hand; and experimental group in which 60 screws were planted into C(2-7) under the guidance of three-dimensional locator system. The condition of screw insertion was observed and the accuracy was evaluated by the integrity of pedicle walls. RESULTS In the control group, 32 screws (53.33%) were placed inside the pedicles and 28 (46.67%) were outside; 9 screws (15.00%) led to nerve root injury, 5 screws (8.33%) caused vertebral artery injury and no spinal cord injury occurred; and the qualification ratio of screw insertion was 76.67% (excellent 32, fair 14, poor 14). While in the experimental group, 54 screws (90.00%) were placed inside the pedicles and 6 (10.00%) were outside; 1 screw (1.67%) caused vertebral artery injury and no nerve root injury and spinal cord injury occurred; and the qualification ratio of screw insertion was 98.33% (excellent 54, fair 5, poor 1). There was significant difference between the two groups (P < 0.05). CONCLUSION Cervical pedicle screw locator system has the advantages of easy manipulation, high accuracy of screw placement and low cost. With further study, it can be applied to the clinical.
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Wang LH, Zhao XL, He ZH, Ma W, Appels R, Peña RJ, Xia XC. Characterization of low-molecular-weight glutenin subunit Glu-B3 genes and development of STS markers in common wheat (Triticum aestivum L.). TAG. THEORETICAL AND APPLIED GENETICS. THEORETISCHE UND ANGEWANDTE GENETIK 2009; 118:525-39. [PMID: 18989655 DOI: 10.1007/s00122-008-0918-9] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2008] [Accepted: 10/14/2008] [Indexed: 05/22/2023]
Abstract
Low-molecular-weight glutenin subunit (LMW-GS) Glu-B3 has a significant influence on the processing quality of the end-use products of common wheat. To characterize the LMW-GS genes at the Glu-B3 locus, gene-specific PCR primers were designed to amplify eight near-isogenic lines and Cheyenne with different Glu-B3 alleles (a, b, c, d, e, f, g, h and i) defined by protein electrophoretic mobility. The complete coding regions of four Glu-B3 genes with complete coding sequence were obtained and designated as GluB3-1, GluB3-2, GluB3-3 and GluB3-4. Ten allele-specific PCR markers designed from the SNPs present in the sequenced variants discriminated the Glu-B3 proteins of electrophoretic mobility alleles a, b, c, d, e, f, g, h and i. These markers were validated on 161 wheat varieties and advanced lines with different Glu-B3 alleles, thus confirming that the markers can be used in marker-assisted breeding for wheat grain processing quality.
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Xu R, Zhao L, Chai B, Ma W, Xia H, Wang G, Jiang W. Lateral radiological evaluation of transarticular screw placement in the lower cervical spine. EUROPEAN SPINE JOURNAL : OFFICIAL PUBLICATION OF THE EUROPEAN SPINE SOCIETY, THE EUROPEAN SPINAL DEFORMITY SOCIETY, AND THE EUROPEAN SECTION OF THE CERVICAL SPINE RESEARCH SOCIETY 2009; 18:392-7. [PMID: 19130097 DOI: 10.1007/s00586-008-0861-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2008] [Revised: 11/18/2008] [Accepted: 12/14/2008] [Indexed: 10/21/2022]
Abstract
This study assessed the ideal district of lateral radiograph in evaluation of transarticular screw placement in the lower cervical spine. To assess the ideal zone of lateral radiographs in determining the safe or hazardous locations of the screw tips during transarticular screw implantation in the lower cervical spine. Transarticular screw in the lower cervical spine had been used as an alternative technique to achieve posterior cervical spine stability. Injury to the spinal nerves caused by transarticular screws which are too long must be identified quickly to minimize the neurologic complication. No previous radiological study regarding evaluation of the transarticular screw placement using lateral radiographs has been reported. Twelve cervical spines were removed from embalmed cadavers. Four transarticular screw placements with Dalcanto's technique under direct visualization, including placement of the screw tip staying the ventral cortex, 2, 4 and 6 mm over-penetration of the ventral cortex, were performed on each specimen. Following each placement, a lateral radiograph was taken. Each vertebral body was divided vertically into four equal zones, and another equal zone posterior to the posterior border of the vertebral body was defined as Zone pre-1. The numbers of screw tips seen in each zone were quantified for each placement. Partitions of chi (2) method was used to evaluate the ideal zone on lateral radiograph for transarticular screw insertion. At C34 and C45, no significant difference was found between Zone pre-1 and Zone 1 (chi(2) = 0.18, P > 0.50), while there was significant difference between Zones 1 and 2 (chi(2) = 73.6, P < 0.005), as well as Zones 2 and 3 (chi(2) = 13.2, P < 0.005). At C56 and C67, No significant difference was found between Zones 2 and 3 (chi(2) = 0.25, P > 0.50), while there was significant difference between Zone pre-1 and Zone 1 (chi(2) = 66.2, P < 0.005), as well as Zones 1 and 2 (chi(2) = 10.5, P < 0.005). Ideal screw tip positions on lateral radiograph for transarticular screw by Dalcanto's technique should be in Zone 1 at C34 and C45, in Zone pre-1 at C56 and C67. If the screw tip was in Zones 3 and 4, the safe rate will be decreased significantly and it might be too deep and be dangerous.
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Dai L, Ma W, Li J, Xu Y, Li W, Zhao Y, Deng F. Cloning and characterization of a novel oocyte-specific gene zorg in zebrafish. Theriogenology 2008; 71:441-9. [PMID: 18817964 DOI: 10.1016/j.theriogenology.2008.07.028] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2008] [Revised: 07/10/2008] [Accepted: 07/28/2008] [Indexed: 11/18/2022]
Abstract
Genes specifically expressed in oocytes are important for the development of both germ cells and embryos. Using the digital differential display program from the NCBI, we identified a novel EST sequence (no. DT881820) from zebrafish ovary libraries in the GenBank. The full-length cDNA of this transcript was obtained by performing 3'- and 5'-RACE and was confirmed by PCR and direct sequencing methods. The cDNA clone for this novel gene consisted of 894 base pairs and encoded a protein with 215 amino acids. Since this protein shared no significant homology with any other known proteins, we have named this gene zorg (zebrafish oogenesis related gene). Based on RT-PCR analysis, this gene was specially expressed in the ovary and was abundantly present at the blastula stage. However, the level of expression decreased significantly during the early gastrula periods. Based on whole-mount in situ hybridization studies, zorg transcripts were uniformly distributed in the cleavage stage through to the blastula stage. In addition, during early gastrulation, zorg transcripts appeared in the dorsal region, but became restricted to the primordial germ cells (PGC) in early somitogenesis and remained visible in PGC as they migrated towards the region of the gonad of embryos 24h post-fertilization. In situ hybridization of sectioned ovaries demonstrated that zorg mRNAs appeared in the cytoplasm of stage I and stage II oocytes and localized in the cortex of stage III and stage IV oocytes during oogenesis. We hypothesized that the protein expressed from the zebrafish zorg gene has roles in the formation of the female germ cells and in early embryonic development in zebrafish.
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Rong Q, Zhang L, Su E, Li J, Li J, Liu Z, Huang Z, Ma W, Cao K, Huang J. Bone marrow-derived mesenchymal stem cells are capable of mediating hepatitis B virus infection in injured tissues. J Viral Hepat 2008; 15:607-14. [PMID: 18507756 DOI: 10.1111/j.1365-2893.2008.00978.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
UNLABELLED We have previously showed that endothelial progenitor cells (EPCs) through uptake of hepatitis B virus (HBV) may play a critical role in mediating extrahepatic HBV diseases. However, it remains to be elucidated whether mesenchymal stem cells (MSCs) are capable of mediating HBV trans-infection into extrahepatic tissues. METHODS AND RESULTS In this study, we showed that HBV antigens, HBV DNA and the viral particles were detected in MSCs after 3 days virus challenge. Neither HBV covalently closed circular DNA nor pregenomic RNA were detected in MSCs. Intravenously transplantation of HBV-exposed MSCs into myocardial infarction mouse model resulted in incorporation of HBV into injured heart and other damaged tissues. CONCLUSION These results indicate that MSCs could serve as an additional extrahepatic virus reservoir, which may play a role at least in part in mediating HBV trans-infection into the injured tissues through the process of MSCs recruitment.
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Zhang D, Chen B, Yang Z, Zhu T, Wang L, Ma W, Zhang F, Cao K. Results of coronary angioplasty in patients aged 80 years and older. CARDIOVASCULAR REVASCULARIZATION MEDICINE 2008. [DOI: 10.1016/j.carrev.2008.03.065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Rugo HS, Franco S, Munster P, Stopeck A, Ma W, Lyandres J, Lahiri S, Arbushites M, Koehler M, Dickler MN. A phase II evaluation of lapatinib (L) and bevacizumab (B) in HER2+ metastatic breast cancer (MBC). J Clin Oncol 2008. [DOI: 10.1200/jco.2008.26.15_suppl.1042] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Ma W, Song D, Jacene H, Vilardell F, Zhang X, Messersmith W, Endres C, Jimeno A, Pomper M, Hidalgo M. Changes in FDG-PET in response to rapamycin (R) correlated with Akt pathway inhibition and not with clinical outcome. J Clin Oncol 2008. [DOI: 10.1200/jco.2008.26.15_suppl.3511] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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