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Chiu H, Dai J, Xiang Y, Chan S, Leung T, Yu X, Hou Z, Ungvari G, Caine E. Suicidal thoughts and behaviors in older adults in rural China: a preliminary study. Int J Geriatr Psychiatry 2012; 27:1124-30. [PMID: 22252964 PMCID: PMC4733507 DOI: 10.1002/gps.2831] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/18/2011] [Accepted: 11/10/2011] [Indexed: 11/07/2022]
Abstract
BACKGROUND One purpose of this study was to examine the feasibility of conducting epidemiological survey on suicidal thoughts and behaviors (hereafter "suicidal thoughts/behaviors"; i.e., any suicidal ideation, serious ideation, planning, and attempts) among older adults in rural China. Another purpose was to investigate among older people in rural China the prevalence of suicidal thoughts/behaviors, as well as their sociodemographic and clinical correlates. METHODS A randomly selected sample of 263 subjects, 50 years or older, was recruited in a remote rural area of Southwestern China (Mianyang Region, Sichuan Province) and interviewed using structured instruments. Basic sociodemographic and clinical data were collected. RESULTS There was no refusal among approached subjects, and subjects were willing to answer questions on suicidal thoughts/behaviors. The lifetime prevalence of suicidal ideation, serious ideation, planning, and attempt was 28.9% (23.4%-34.4%), 19.7% (14.9%-24.6%), 11.4% (7.5%-15.3%), and 5.3% (2.6%-8.1%), respectively. The corresponding 12-month prevalence was 8.8% (5.3%-12.2%), 5.3% (2.6%-8.1%), 2.7% (0.7%-4.6%), and 0%, respectively. The 2-week prevalence was 3.4% (1.2%-5.6%), 2.3% (0.5%-4.1%), 2.3% (0.5%-4.1%), and 0%, respectively. Correlates of suicidal thoughts/behaviors of this group are similar to findings from other community studies, such as female gender, unmarried status, major medical conditions, insomnia, financial difficulties and lower education, depressive symptoms, recent stressful life events, greater life dissatisfaction. CONCLUSIONS Our findings suggest that larger scale epidemiological survey of suicidal thoughts/behaviors on older adults in rural China would be feasible. Suicidal thoughts/behaviors are common among older people in rural China, as seen in this preliminary study, which points to the need for further larger scale investigations.
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Affiliation(s)
- H.F.K. Chiu
- Department of Psychiatry, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - J. Dai
- Department of Psychiatry, The Chinese University of Hong Kong, Hong Kong SAR, China,Shenzhen Institute of Mental Health, Shenzhen, China,Center for the Study and Prevention of Suicide, Department of Psychiatry, University of Rochester Medical Center, Rochester, NY, and VA Center of Excellence for Suicide Prevention, Canandaigua, NY, USA
| | - Y.T. Xiang
- Department of Psychiatry, The Chinese University of Hong Kong, Hong Kong SAR, China,Beijing Anding Hospital, Capital Medical University, Beijing, China
| | - S.S.M. Chan
- Department of Psychiatry, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - T. Leung
- Department of Psychiatry, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - X. Yu
- Institute of Mental Health, Peking University, Beijing, China
| | - Z.J. Hou
- Sichuan College of Traditional Chinese Medicine, Mianyang, Sichuan, China
| | - G.S. Ungvari
- Graylands Hospital & School of Psychiatry and Clinical Neurosciences, University of Western Australia, Perth, Australia
| | - E.D. Caine
- Center for the Study and Prevention of Suicide, Department of Psychiatry, University of Rochester Medical Center, Rochester, NY, and VA Center of Excellence for Suicide Prevention, Canandaigua, NY, USA
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Cui X, Chopp M, Zacharek A, Dai J, Zhang C, Yan T, Ning R, Roberts C, Shehadah A, Kuzmin-Nichols N, Sanberg CD, Chen J. Combination treatment of stroke with sub-therapeutic doses of Simvastatin and human umbilical cord blood cells enhances vascular remodeling and improves functional outcome. Neuroscience 2012; 227:223-31. [PMID: 23041512 DOI: 10.1016/j.neuroscience.2012.09.066] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2012] [Revised: 09/25/2012] [Accepted: 09/26/2012] [Indexed: 12/18/2022]
Abstract
Human umbilical cord blood cells (HUCBCs) have been employed as a restorative treatment for experimental stroke. In this study, we investigated whether transplantation of sub-therapeutic doses of HUCBCs and Simvastatin enhances cerebral vascular remodeling after stroke. Adult male Wistar rats (n=34) were subjected to transient middle cerebral artery occlusion (MCAo) and treated with: phosphate-buffered solution (PBS, gavaged daily for 7 days); Simvastatin (0.5mg/kg, gavaged daily for 7 days); HUCBCs (1×10(6), injected once via tail vein); and combination Simvasatin with HUCBCs, starting at 24h after MCAo. There was no significant difference between Simvastatin- or HUCBC-monotherapy and MCAo-alone group. Combination treatment 24h post-stroke significantly increased the perimeter of von Willebrand factor (vWF)-positive vessels, the diameter and density of alpha smooth muscle actin (αSMA)-positive arteries, and the percentage of 5-bromodeoxyuridine (BrdU)-positive endothelial cells (ECs) in the ischemic boundary zone (IBZ) compared with MCAo-alone or HUCBC-monotherapy 14 days after MCAo (p<0.05, n=8/group); Combination treatment significantly increased the densities of vWF-vessels and αSMA-arteries as well as the densities of BrdU-ECs and BrdU-positive smooth muscle cells (SMCs) in vascular walls in the IBZ compared with Simvastatin-monotherapy. Moreover, the increased BrdU-ECs and BrdU-SMCs were significantly correlated with neurological functional outcome 14 days after MCAo. Combination treatment also significantly increased the expression of Angiopoietin-1 (Ang1), Tie2 and Occludin in the IBZ (p<0.05, n=8/group). The in vitro experiments showed that combination treatment and Ang1 significantly increased capillary-like tube formation and arterial cell migration; anti-Ang1 significantly reduced combination treatment-induced tube-formation and artery cell migration (p<0.05, n=6/group). These findings indicated that a combination of sub-therapeutic doses of Simvastatin and HUCBCs treatment of stroke increases Ang1/Tie2 and Occludin expression in the ischemic brain, amplifies endogenous angiogenesis and arteriogenesis, and enhances vascular remodeling which in concert may contribute to functional outcome after stroke.
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Affiliation(s)
- X Cui
- Department of Neurology, Henry Ford Health System, Detroit, MI 48202, USA
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153
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Zhu GY, Chen GF, Li JT, Shi ZL, Lin Y, Ding T, Xu XY, Dai J, Xu CX. Fabrication and characterization of n-ZnO nanonails array/p(+)-GaN heterojunction diode. J Nanosci Nanotechnol 2012; 12:7950-7953. [PMID: 23421162 DOI: 10.1166/jnn.2012.6658] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
A novel heterojunctional structure of n-ZnO nanonails array/p(+)-GaN light-emitting diode was fabricated by Chemical Vapor Deposition method. A broad electroluminescence spectrum shows two peaks centered at 435 nm and 478 nm at room temperature, respectively. By comparing the photoluminescence and electroluminescence spectra, together with analyzing the energy band structure of heterojunction light emitting diode, it suggested that the electroluminescence peak located at 435 nm originates from Mg acceptor level of p(+)-GaN layer, whereas the electroluminescence peak located at 478 nm originates from the defects of n-ZnO nanonails array.
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Affiliation(s)
- G Y Zhu
- State Key Laboratory of Bioelectronics, School of Electronic Science and Engineering, Southeast University, Nanjing 210096, China
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Mutter M, Smith M, Lee J, Dai J, Sochor M, Trowbridge M. 365 The Relationship Between Rising Gas Prices and Bicycle-Related Traumatic Brain Injuries in the United States, 1997-2009. Ann Emerg Med 2012. [DOI: 10.1016/j.annemergmed.2012.06.397] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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155
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Wen F, Zhou Y, Wang W, Hu QC, Liu YT, Zhang PF, Du ZD, Dai J, Li Q. Ca/Mg infusions for the prevention of oxaliplatin-related neurotoxicity in patients with colorectal cancer: a meta-analysis. Ann Oncol 2012; 24:171-8. [PMID: 22898039 DOI: 10.1093/annonc/mds211] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND Oxaliplatin-related neurotoxicity is the main limitation for its continuation in adjuvant and palliative chemotherapy for patients with colorectal cancer. The purpose of this meta-analysis was to determine the efficacy of calcium and magnesium (Ca/Mg) infusions in oxaliplatin-induced neurotoxicity. METHODS Two independent authors conducted database searches of the literature to find clinical-controlled trials analyzing Ca/Mg infusions in oxaliplatin-induced neurotoxicity. The keywords used to search were oxaliplatin, neurotoxicity, calcium, magnesium, neuropathy, and peripheral. Clinical studies that included at least one primary or secondary event were eligible for the analysis, where primary events were incidences of acute and cumulative neurotoxicity, and secondary events were the total doses and cycles of oxaliplatin, response rate (RR), overall survival (OS), and progression-free survival (PFS). Odds ratios (ORs) and weighted mean differences (MD) were analyzed using models of fixed and random effects. RESULTS This meta-analysis comprised four prospective randomized clinical trials and three retrospective clinical trials involving 1170 colorectal cancer patients, of which 802 received Ca/Mg infusions (Ca/Mg group) and 368 did not (control group). According to the National Cancer Institute-Common Terminology Criteria for Adverse Events, the incidence of grade 3 acute neurotoxicity in those who received Ca/Mg was significantly lower than that of the control group (OR=0.26; 95% confidence interval (CI), 0.11 to 0.62; P=0.0002). The total rate of cumulative neurotoxicity, and that of grade 3 in particular, was significantly lower in the Ca/Mg group than in the control group (OR=0.42; 95% CI 0.26-0.65; P=0.0001; OR=0.60; 95% CI 0.39-0.92; P=0.02, respectively). The differences in total doses and cycles of oxaliplatin were also significant between the Ca/Mg and control group (MD=246.73 mg/m2; 95% CI 3.01-490.45; P=0.05; MD=1.55; 95% CI 0.46-2.63; P=0.005, respectively). No significant differences were found in median PFS (MD=0.71 month; 95% CI -0.59-2.01; P=0.29), median OS (MD=0.10 month; 95% CI -0.41-0.61; P=0.70) or RRs (OR=0.82; 95% CI 0.61-1.10; P=0.18). CONCLUSION Ca/Mg infusions tend to decrease the incidence of oxaliplatin-induced acute and cumulative neurotoxicity and thus enhance patients' tolerance to oxaliplatin, without significantly altering the efficacy of chemotherapy.
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Affiliation(s)
- F Wen
- Department of Medical Oncology, Cancer Center, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, People's Republic of China
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Dai J, Fan XM, Liu H, Wang J, Liu HR, Zhang FZ. Fabrication and high visible light photocatalytic properties of Cu/Cu2O nanocomposites by the one-pot solution-phase hydrothermal method. J Nanosci Nanotechnol 2012; 12:6412-6419. [PMID: 22962757 DOI: 10.1166/jnn.2012.6434] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Cu/Cu2O nanocomposites were synthesized by the one-pot solution-phase hydrothermal method. The resulting products were characterized by X-ray diffraction, field emission scanning electron microscope and X-ray photoelectron spectroscopy. Experimental results indicate that the content of Cu in the Cu/Cu2O CNs increasing with prolonged reaction time. The content of Cu in the Cu/Cu2O CNs plays an important role in the photocatalytic activity. The coexistence of Cu2O and Cu nanoparticles was propitious to the high photocatalytic activity owing to their hetero-junction effect. Compared with the Cu/Cu2O CNs with high Cu content (68-96 wt%) and pure Cu2O, the Cu/Cu2O CNs with low Cu content (2.1-9.2 wt%) exhibited improved photocatalytic activity on the degradation of MO solution under visible light irradiation, at the first 20 min of irradiation, the photodegradation efficiency of MO solution reach up to 99%, it is still as high as 95% even at the end of the fourth cycle. Little change is found in their phase compositions during the photocatalytic reaction process, except partial oxidation of particles surface. The HmechanismH for visible light driven photocatalytic activity enhancement over Cu/Cu2O CNs is discussed.
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Affiliation(s)
- J Dai
- Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China
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157
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González OA, Escamilla C, Danaher RJ, Dai J, Ebersole JL, Mumper RJ, Miller CS. Antibacterial effects of blackberry extract target periodontopathogens. J Periodontal Res 2012; 48:80-6. [PMID: 22812456 DOI: 10.1111/j.1600-0765.2012.01506.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
BACKGROUND AND OBJECTIVE Antimicrobial agents provide valuable adjunctive therapy for the prevention and the control of oral diseases. Limitations in their prolonged use have stimulated the search for new, naturally occurring agents with more specific activity and fewer adverse effects. Here we sought to determine the antibacterial properties of blackberry extract (BBE) in vitro against oral bacterial commensals and periodontopathogens. MATERIAL AND METHODS The effects of whole and fractionated BBE on the metabolism of 10 different oral bacteria were evaluated using the colorimetric water-soluble tetrazolium-1 assay. The bactericidal effects of whole BBE against Fusobacterium nucleatum were determined by quantitating the numbers of colony-forming units (CFUs). Cytotoxicity was determined in oral epithelial (OKF6) cells. RESULTS BBE at 350-1400 μg/mL reduced the metabolic activity of Porphyromonas gingivalis, F. nucleatum and Streptococcus mutans. The reduced metabolic activity observed for F. nucleatum corresponded to a reduction in the numbers of CFUs following exposure to BBE for as little as 1 h, indicative of its bactericidal properties. An anthocyanin-enriched fraction of BBE reduced the metabolic activity of F. nucleatum, but not of P. gingivalis or S. mutans, suggesting the contribution of species-specific agents in the whole BBE. Oral epithelial cell viability was not reduced following exposure to whole BBE (2.24-1400 μg/mL) for ≤ 6 h. CONCLUSION BBE alters the metabolic activity of oral periodontopathogens while demonstrating a minimal effect on commensals. The specific antibacterial properties of BBE shown in this study, along with its previously demonstrated anti-inflammatory and antiviral properties, make this natural extract a promising target as an adjunct for prevention and/or complementary therapy of periodontal infections.
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Affiliation(s)
- O A González
- Department of Oral Health Practice, Center for Oral Health Research, College of Dentistry, University of Kentucky, Lexington, KY 40536-0297, USA
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158
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Wang H, Fang H, Dai J, Liu G, Xu ZJ. Induced pluripotent stem cells for spinal cord injury therapy: current status and perspective. Neurol Sci 2012; 34:11-7. [PMID: 22797773 DOI: 10.1007/s10072-012-1145-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2012] [Accepted: 06/13/2012] [Indexed: 12/29/2022]
Abstract
Spinal cord injury (SCI) is induced by a variety of damages such as trauma, ischemia, and iatrogenic injury, resulting in sense and motion dysfunction. Despite the improvements in medical and surgical care, current treatment methods for SCI demonstrate poor and delayed efficiency, leading to different degree of permanent loss of neural function and disability in the patients. Rapid advances in stem-cells research suggest that stem cells may be applied in SCI therapy. Indeed, SCI is a major field in which stem-cell therapy has been proposed and practised, and most recently the clinical trials of stem-cell therapy were initiated, which aroused a number of clinical concerns. In this review, we summarize current status of SCI repair, then introduce the sources and biological characteristics of induced pluripotent stem cells (iPSCs), and discuss the differentiation potential of iPSCs and the perspective of the application of iPSCs in SCI therapy.
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Affiliation(s)
- H Wang
- Department of Orthopedic Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095 Jiefang Avenue, Wuhan 430030, China
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159
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Dai J, Liu X, Wang Y. Genetic diversity and phylogeny of rhizobia isolated from Caragana microphylla growing in desert soil in Ningxia, China. Genet Mol Res 2012; 11:2683-93. [DOI: 10.4238/2012.june.25.5] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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160
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Zhang X, Li M, Cao J, Luo JW, Xu GZ, Gao L, Yi J, Huang X, Xiao J, Li S, Dai J. Dosimetric variations of target volumes and organs at risk in nasopharyngeal carcinoma intensity-modulated radiotherapy. Br J Radiol 2011; 85:e506-13. [PMID: 22096217 DOI: 10.1259/bjr/20695672] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVE The aim of this study was to evaluate the actual dose variability to the targets and organs at risk (OARs) during nasopharyngeal carcinoma (NPC) intensity-modulated radiotherapy (IMRT) and to investigate the significance of replanning. METHODS 11 NPC patients were included in this study. Each patient had both a planning CT and weekly repeated CT. Simulated plans that were generated by using the same beam configurations mapped to the repeated CT represented the actual delivered doses to the target volumes and OARs. An IMRT replanning was performed with the fifth week CT scan. Doses among the initial plan, the simulated plans and replanning were compared. RESULTS There were no significant dosimetric differences in the gross tumour volume, clinical target volume (CTV) 1 or CTV2 for either the simulated plans or the replanning compared with the initial plan. Dosimetric variability of both parotid glands and the brain stem were unique to each individual, and doses to the spinal cord were always maintained within the limit. Replanning in the fifth week had significantly decreased the doses delivered to both parotids (p-values of the mean dose were 0.015 and 0.026 for the left and right parotid, respectively), whereas it did not reduce the doses to the brain stem and spinal cord. There was no relationship between dose variability and weight loss. CONCLUSIONS There are no significant dose changes for target volumes and spinal cord, and doses to the brain stem and both parotid glands changed individually during NPC IMRT. Replanning helps to spare bilateral parotids.
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Affiliation(s)
- X Zhang
- Department of Radiation Oncology, Cancer Hospital of the Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
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161
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Chebrolu V, Dai J, Tewatia D, Yan Y, Saenz D, Sethares W, Kissick M, Cannon G, Fain S, Paliwal B. Real-Time Automated Target Volume and Motion Quantification for Adaptive Four-Dimensional MRI/CT Guided Radiation Therapy. Int J Radiat Oncol Biol Phys 2011. [DOI: 10.1016/j.ijrobp.2011.06.1432] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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Abstract
Haemophilia A (HA) and haemophilia B (HB) are the most common X-linked inherited bleeding disorders. It is important to detect the carrier women in families with HA/HB and subsequent antenatal diagnosis of confirmed carriers. This study consists of 102 HA families which include 68 mothers for prenatal diagnosis and 107 female relatives for carrier diagnosis, and 29 HB families which include 16 mothers and 31 female relatives respectively. The rapid fluorescent PCR with two groups of different combined polymorphism markers was applied for linkage analysis in HA and HB families respectively. The Amelogenin gene was added to help the detection of gender diagnosis. Gene sequencing was also used to detect the mutations directly. There were 37 causative F8C mutations (23 novel) and 24 causative F9C mutations (eight novel) found in this cohort of patients. Few of the women could not be diagnosed due to homologous recombination and/or inability to locate the mutation. Complicated cases have been found in some families. With regard to carrier and prenatal diagnosis, it was considered that genetic diagnosis by linkage analysis and direct sequencing was successful. Some special families might require combination of the linkage analysis and gene sequence for a successful diagnosis. New intragenic SNP and STR sites special to Chinese population need to be discovered.
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Affiliation(s)
- J Dai
- Clinical Transfusion Department, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, China
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164
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Sun F, Zhong S, Zhou W, Xin H, Dai J, Wang X, Shen Z. UP-01.006 Clinical and Pathological Analyses of Adrenal Lipomatous Tumors: Experience With 51 Cases in China. Urology 2011. [DOI: 10.1016/j.urology.2011.07.558] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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165
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Chebrolu V, Tewatia D, Dai J, Saenz D, Sethares W, Fain S, Paliwal B. TH-A-220-06: Four-Dimensional MRI/CT Based Auto-Adaptive Segmentation for Real-Time Radiotherapy in Lung Cancer Treatment. Med Phys 2011. [DOI: 10.1118/1.3613484] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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166
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Zhao B, Dai J. SU-E-T-846: Considering Marker Visibility during Planning Optimization for Dynamic Intensity-Modulated Radiation Therapy. Med Phys 2011. [DOI: 10.1118/1.3612810] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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167
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Chen X, Jin D, Dai J. SU-E-T-787: Noncoplanar Intensity-Modulated Radiation Therapy for Young Female Patients with Mediastinal Lymphoma. Med Phys 2011. [DOI: 10.1118/1.3612751] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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168
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Zhang Y, Xiao J, Dai J, Zhang Y. SU-E-T-820: Comparison of VMAT and IMRT for Stereotactic Body Radiation Therapy (SBRT) of the Adrenal Metastases. Med Phys 2011. [DOI: 10.1118/1.3612784] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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169
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Li M, Dai J. SU-E-T-623: Analysis of the Margin from Clinical Target Volume (CTV) to Planning Target Volume (PTV) for Radiotherapy in Lung Cancer. Med Phys 2011. [DOI: 10.1118/1.3612586] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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170
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Hu Z, Dai J. SU-E-T-792: Dosimetric Influence of Carbon Fiber Couchtop on Volumetric-Modulated Arc Therapy. Med Phys 2011. [DOI: 10.1118/1.3612756] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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171
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Dai J, Chiu H, Conner KR, Chan S, Hou Z, Yu X, Caine E. Suicidal ideation and attempts among rural Chinese aged 16-34 years--socio-demographic correlates in the context of a transforming China. J Affect Disord 2011; 130:438-46. [PMID: 21106251 PMCID: PMC3085596 DOI: 10.1016/j.jad.2010.10.042] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/27/2010] [Revised: 10/26/2010] [Accepted: 10/26/2010] [Indexed: 11/15/2022]
Abstract
BACKGROUND The distinctive epidemiologic profile of suicide in China, with notably high rates among rural young adult females, invites examination of possible underlying risk factors. Although there are accumulating data regarding the epidemiology of suicide among youth and young adults in China, there are meager data on suicidal ideation and attempts despite its importance. METHODS Our study in 2005-06 sought to identify all potentially suitable rural participants, aged 16-34 years, from 10 representative villages in rural Sichuan Province. We conducted structured interviews regarding a range of socio-demographic characteristics and suicidal morbidity. RESULTS 1654 of a potential 3008 participants participated; lifetime and one-year prevalence were: suicidal ideation (18.8% and 5.2%), serious ideation (8.6% and 2.3%), planning (5.8% and 1.5%), and attempt (2.7% and 0.5%). Comparisons among strata of socio-demographic characteristics showed more prevalent suicidal ideation associated with: female gender, lower education, poorer financial perception, greater rurality of residence, and marital status of "never married" or "others". Suicidal attempt was associated with: female gender and a marital status of "others". LIMITATIONS The study was carried out in one province and caution is required when considering other rural regions of China. There were a substantial number of unapproachable subjects because of their migrant work at distant sites. CONCLUSIONS Our results revealed an apparently higher prevalence for suicide ideation and planning compared with residents of other countries, but a lower prevalence for attempts. These data suggests that the relatively high rate of suicide in rural China reflects an elevated case fatality ratio due to chosen methods. The results also revealed unique patterns for correlates with the occurrence of ideation and attempts.
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Affiliation(s)
- J. Dai
- Department of Psychiatry, The Chinese University of Hong Kong, Hong Kong SAR, China,Center for the Study and Prevention of Suicide, Department of Psychiatry, University of Rochester Medical Center, Rochester, NY USA
| | - H.F.K. Chiu
- Department of Psychiatry, The Chinese University of Hong Kong, Hong Kong SAR, China,Corresponding Author. Department of Psychiatry, Tai Po Hospital, Ground Floor, Multi-centre, No. 9 Chuen On Road, Tai Po, NT, Hong Kong. . Telephone (852) 2607-6027, Fax (852) 2667-8308
| | - K. R. Conner
- Center for the Study and Prevention of Suicide, Department of Psychiatry, University of Rochester Medical Center, Rochester, NY USA
| | - S.S.M. Chan
- Department of Psychiatry, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Z.J. Hou
- Sichuan College of Traditional Chinese Medicine, Mianyang, Sichuan, China
| | - X. Yu
- Institute of Mental Health, Peking University School of Medicine, Beijing, China
| | - E.D. Caine
- Center for the Study and Prevention of Suicide, Department of Psychiatry, University of Rochester Medical Center, Rochester, NY USA
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172
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Han J, Dai J, Guo R. Highly efficient adsorbents of poly(o-phenylenediamine) solid and hollow sub-microspheres towards lead ions: A comparative study. J Colloid Interface Sci 2011; 356:749-56. [DOI: 10.1016/j.jcis.2011.01.038] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2010] [Revised: 01/08/2011] [Accepted: 01/11/2011] [Indexed: 10/18/2022]
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173
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Alsac JM, Journe C, Louedec L, Dai J, Julia P, Fabiani JN, Michel JB. Downregulation of Remodelling Enzymatic Activity Induced by an Angiotensin-converting Enzyme Inhibitor (Perindopril) Reduces the Degeneration of Experimental Abdominal Aortic Aneurysms in a Rat Model. Eur J Vasc Endovasc Surg 2011; 41:474-80. [DOI: 10.1016/j.ejvs.2010.12.007] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2010] [Accepted: 12/15/2010] [Indexed: 11/25/2022]
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174
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Liu Y, Wang C, Zhong Y, Li X, Dai J, Ren X, Xu Z, Li L, Yao Z, Ji D, Wang L, Zhang L, Wong VW‐S, Zoulim F, Xu D. Genotypic resistance profile of hepatitis B virus (HBV) in a large cohort of nucleos(t)ide analogue-experienced Chinese patients with chronic HBV infection. J Viral Hepat 2011; 18:e29-39. [PMID: 21392168 PMCID: PMC7167191 DOI: 10.1111/j.1365-2893.2010.01360.x] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The study investigated the hepatitis B virus (HBV) genotypic resistance profile in 1803 nucleos(t)ide analogue (NA)-experienced Chinese patients with chronic HBV infection. Serum HBV DNA was extracted, and the reverse transcriptase region was analysed by a high-sensitive direct PCR sequencing and verified by clonal sequencing if necessary. Drug-resistant mutations were detected in 560 of the 1803 patients, including 214 of 490 patients who received lamivudine (LAM), 35 of 428 patients who received adefovir (ADV), five of 18 patients who received telbivudine and 306 of 794 patients who received various sequential/combined NA therapies. ADV-resistant mutations were detected in 36 of 381 patients who received LAM and then switched-to ADV in contrast to one of 82 patients who received ADV add-on LAM. Entecavir (ETV)-resistant mutations were detected not only in LAM- and ETV-treated patients but also in LAM-treated ETV-naïve patients. Double mutations rtM204I and rtL180M were detected more frequently in genotype C than in genotype B virus, and patients infected with this mutant had higher alanine transaminase levels than those infected with mutant containing the rtM204I substitution alone. Multidrug-resistant HBV strains were identified in eight patients, including two novel strains with mutational patterns rtL180M + A181V + S202G + M204V + N236T and rtL180M + S202G + M204V + N236T. The results provide new information on HBV genotypic resistance profiles in a large cohort of Chinese patients with chronic HBV infection and may have important clinical implication for HBV drug resistance management in China.
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Affiliation(s)
- Y. Liu
- Viral Hepatitis Research Laboratory, Institute of Infectious Diseases, Beijing 302 Hospital, Beijing, China
| | - C. Wang
- Viral Hepatitis Research Laboratory, Institute of Infectious Diseases, Beijing 302 Hospital, Beijing, China
| | - Y. Zhong
- Viral Hepatitis Research Laboratory, Institute of Infectious Diseases, Beijing 302 Hospital, Beijing, China
| | - X. Li
- Viral Hepatitis Research Laboratory, Institute of Infectious Diseases, Beijing 302 Hospital, Beijing, China
| | - J. Dai
- Viral Hepatitis Research Laboratory, Institute of Infectious Diseases, Beijing 302 Hospital, Beijing, China
| | - X. Ren
- Viral Hepatitis Research Laboratory, Institute of Infectious Diseases, Beijing 302 Hospital, Beijing, China
| | - Z. Xu
- Viral Hepatitis Research Laboratory, Institute of Infectious Diseases, Beijing 302 Hospital, Beijing, China
| | - L. Li
- Viral Hepatitis Research Laboratory, Institute of Infectious Diseases, Beijing 302 Hospital, Beijing, China
| | - Z. Yao
- Viral Hepatitis Research Laboratory, Institute of Infectious Diseases, Beijing 302 Hospital, Beijing, China
| | - D. Ji
- Viral Hepatitis Research Laboratory, Institute of Infectious Diseases, Beijing 302 Hospital, Beijing, China
| | - L. Wang
- Viral Hepatitis Research Laboratory, Institute of Infectious Diseases, Beijing 302 Hospital, Beijing, China
| | - L. Zhang
- Viral Hepatitis Research Laboratory, Institute of Infectious Diseases, Beijing 302 Hospital, Beijing, China
| | - V. W. ‐S. Wong
- Department of Medicine and Therapeutics and Institute of Digestive Disease, The Chinese University of Hong Kong, Hong Kong, China
| | - F. Zoulim
- INSERM, U871, Lyon, France,Université Lyon 1, IFR62 Lyon‐Est, Lyon, France,Hospices Civils de Lyon, Hôtel Dieu, Department of Hepatology and Gastroenterology, Lyon, France
| | - D. Xu
- Viral Hepatitis Research Laboratory, Institute of Infectious Diseases, Beijing 302 Hospital, Beijing, China
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175
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Chen X, Dai J, Ai L, Ru X, Wang J, Li S, Young GS. Clival invasion on multi-detector CT in 390 pituitary macroadenomas: correlation with sex, subtype and rates of operative complication and recurrence. AJNR Am J Neuroradiol 2011; 32:785-9. [PMID: 21436342 DOI: 10.3174/ajnr.a2364] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE Clival invasion, a rare but potentially significant complication of pituitary adenoma, is difficult to detect on MR imaging. Because CT is widely used in adjunct guidance of pituitary surgery and it has recently been suggested that preoperative CT may add useful diagnostic information in addition to pituitary MR imaging, we performed the first large cross-sectional imaging study to define the image attributes, clinical correlates, and prognostic implications of clival invasion on CT for pituitary adenoma surgical guidance. MATERIALS AND METHODS Preoperative CT images from 390 patients with histopathologically diagnosed pituitary macroadenoma were reviewed retrospectively and classified by the presence and degree of clival invasion. Tumor volume, tumor subtype, patient sex, operative complication, and recurrence rates were compared between groups. RESULTS After we corrected for multiple correlations, the most significant independent risk factor for clival invasion was female sex (OR=3.62, P=.014, multinomial logistic regression), followed by large tumor volume (OR=1.08, P<.001), and null-cell subtype (OR=5.47, P<.001). Larger tumor volume correlated with null-cell subtype (Mann-Whitney U test, P=.006), incidence of clival invasion (P<.001), and extent of clival invasion (P=.038). Clival invasion was associated with a significantly higher ratio of operative complications (15.63%, χ(2)=7.067, P=.008) and recurrence (57.14%, χ(2)=10.739, P=.001). CONCLUSIONS CT detection of clival invasion by pituitary macroadenoma is significantly more common in women, in patients with large tumors, and in patients with null-cell tumors, and it is associated with a higher rate of operative complications and recurrences. Attention to the presence of clival invasion on preoperative CT and prospective investigation of its prognostic significance are indicated. Attention to this finding on pituitary guidance CT is warranted.
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Affiliation(s)
- X Chen
- Department of Radiology, Beijing Tiantan Hospital, Capital Medical University, Beijing, PR China
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176
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Bókkon I, Vimal RLP, Wang C, Dai J, Salari V, Grass F, Antal I. Visible light induced ocular delayed bioluminescence as a possible origin of negative afterimage. J Photochem Photobiol B 2011; 103:192-9. [PMID: 21463953 DOI: 10.1016/j.jphotobiol.2011.03.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2010] [Revised: 02/24/2011] [Accepted: 03/15/2011] [Indexed: 12/11/2022]
Abstract
The delayed luminescence of biological tissues is an ultraweak reemission of absorbed photons after exposure to external monochromatic or white light illumination. Recently, Wang, Bókkon, Dai and Antal (2011) [10] presented the first experimental proof of the existence of spontaneous ultraweak biophoton emission and visible light induced delayed ultraweak photon emission from in vitro freshly isolated rat's whole eye, lens, vitreous humor and retina. Here, we suggest that the photobiophysical source of negative afterimage can also occur within the eye by delayed bioluminescent photons. In other words, when we stare at a colored (or white) image for few seconds, external photons can induce excited electronic states within different parts of the eye that is followed by a delayed reemission of absorbed photons for several seconds. Finally, these reemitted photons can be absorbed by non-bleached photoreceptors that produce a negative afterimage. Although this suggests the photobiophysical source of negative afterimages is related retinal mechanisms, cortical neurons have also essential contribution in the interpretation and modulation of negative afterimages.
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Affiliation(s)
- I Bókkon
- Doctoral School of Pharmaceutical and Pharmacological Sciences, Semmelweis University, Budapest, Hungary.
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177
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Dai J, Meng Q. Differential function of protective agents at each stage of the hypothermic preservation of hepatocytes. J Biochem 2011; 149:739-45. [DOI: 10.1093/jb/mvr030] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
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178
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Duan N, Liu X, Dai J, Lin C, Xia X, Gao R, Wang Y, Chen S, Yang J, Qi J. Evaluating the environmental impacts of an urban wetland park based on emergy accounting and life cycle assessment: A case study in Beijing. Ecol Modell 2011. [DOI: 10.1016/j.ecolmodel.2010.08.028] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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179
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Gao Y, Dai J, Peng H, Liu Y, Xu T. Isolation and characterization of a novel organic solvent-tolerant Anoxybacillus sp. PGDY12, a thermophilic Gram-positive bacterium. J Appl Microbiol 2010; 110:472-8. [DOI: 10.1111/j.1365-2672.2010.04903.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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180
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Abstract
To investigate the short-term effects of laser-assisted subepithelial keratectomy (LASEK) on the corneal endothelium, 10 patients undergoing LASEK for myopia without complications (20 eyes) were observed. Each eye was evaluated by slit-lamp biomicroscopy and non-contact specular microscopy pre-operatively, and at 15 min, 1 day and 1 week post-operatively. The decrease in endothelial cell density was statistically significant at 15 min post-operatively, and the difference between pre-operative and 15-min post-operative coefficient of variation of cell size was also statistically significant. The percentage of hexagonal cells was significantly different from baseline levels at 15 min and at 1 day post-operatively. All parameters at 1 week post-operatively were not statistically different from those observed pre-operatively. Immediate changes in endothelial cell number and morphology occurred following LASEK, but endothelial morphology returned to the pre-operative condition after 1 week. Long-term follow-up is needed to identify further consequences of this procedure.
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Affiliation(s)
- J Zhou
- Myopia Key Laboratory of the Health Ministry, Eye and ENT Hospital of Fudan University, Shanghai, China
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181
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Gao L, Chen J, Chen J, Yang J, Qiao S, Xu B, Li J, Qin X, Yao M, Wu Y, Yuan J, You S, Chen Y, Dai J, Qian J, Gao R. e0362 Correlation between atherosclerotic plaques morphology and serous hypersensitive C-reactive protein in patients with premature coronary heart disease. Heart 2010. [DOI: 10.1136/hrt.2010.208967.362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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182
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Dai J, Kim OH, Cho TJ, Schmidt-Rimpler M, Tonoki H, Takikawa K, Haga N, Miyoshi K, Kitoh H, Yoo WJ, Choi IH, Song HR, Jin DK, Kim HT, Kamasaki H, Bianchi P, Grigelioniene G, Nampoothiri S, Minagawa M, Miyagawa SI, Fukao T, Marcelis C, Jansweijer MCE, Hennekam RCM, Bedeschi F, Mustonen A, Jiang Q, Ohashi H, Furuichi T, Unger S, Zabel B, Lausch E, Superti-Furga A, Nishimura G, Ikegawa S. Novel and recurrent TRPV4 mutations and their association with distinct phenotypes within the TRPV4 dysplasia family. J Med Genet 2010; 47:704-9. [PMID: 20577006 DOI: 10.1136/jmg.2009.075358] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
BACKGROUND Mutations in TRPV4, a gene that encodes a Ca(2+) permeable non-selective cation channel, have recently been found in a spectrum of skeletal dysplasias that includes brachyolmia, spondylometaphyseal dysplasia, Kozlowski type (SMDK) and metatropic dysplasia (MD). Only a total of seven missense mutations were detected, however. The full spectrum of TRPV4 mutations and their phenotypes remained unclear. OBJECTIVES AND METHODS To examine TRPV4 mutation spectrum and phenotype-genotype association, we searched for TRPV4 mutations by PCR-direct sequencing from genomic DNA in 22 MD and 20 SMDK probands. RESULTS TRPV4 mutations were found in all but one MD subject. In total, 19 different heterozygous mutations were identified in 41 subjects; two were recurrent and 17 were novel. In MD, a recurrent P799L mutation was identified in nine subjects, as well as 10 novel mutations including F471del, the first deletion mutation of TRPV4. In SMDK, a recurrent R594H mutation was identified in 12 subjects and seven novel mutations. An association between the position of mutations and the disease phenotype was also observed. Thus, P799 in exon 15 is a hot codon for MD mutations, as four different amino acid substitutions have been observed at this codon; while R594 in exon 11 is a hotspot for SMDK mutations. CONCLUSION The TRPV4 mutation spectrum in MD and SMDK, which showed genotype-phenotype correlation and potential functional significance of mutations that are non-randomly distributed over the gene, was presented in this study. The results would help diagnostic laboratories establish efficient screening strategies for genetic diagnosis of the TRPV4 dysplasia family diseases.
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Affiliation(s)
- J Dai
- Laboratory for Bone and Joint Diseases, Center for Genomic Medicine, 4-6-1 Shirokane-dai, Minato-ku, Tokyo 108-8639, Japan
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183
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Michineau S, Dai J, Gervais M, Zidi M, Clowes AW, Becquemin JP, Michel JB, Allaire E. Aortic length changes during abdominal aortic aneurysm formation, expansion and stabilisation in a rat model. Eur J Vasc Endovasc Surg 2010; 40:468-74. [PMID: 20554458 DOI: 10.1016/j.ejvs.2010.05.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2010] [Accepted: 05/05/2010] [Indexed: 11/17/2022]
Abstract
BACKGROUND Determinants of extracellular matrix (ECM) destruction/reconstruction balance influencing abdominal aortic aneurysm (AAA) diameter may impact length. OBJECTIVE Document aortic lengthening, its correlation to diameter, and determine how treatments that impact diameter also affect length. METHODS Three hundred and fifty-five diameter and length measurements were performed in 308 rats during AAA formation, expansion and stabilisation in guinea pig aortas xenografted in rats. Impact of modulation of ECM destructive/reconstructive balance by endovascular Vascular Smooth Muscle Cell (VSMCs) seeding, TIMP-1, PAI-1 and TGF-beta1 overexpression on length has been assessed. RESULTS Length increased in correlation with diameter during formation (correlation coefficient (cc): 0.584, P<0.0001) and expansion (cc: 0.352, P=0.0055) of AAAs. Overexpression of TIMP-1 and PAI-1 decreased lengthening (P=0.02 and 0.014, respectively) demonstrating that elongation is driven by matrix metalloproteinases and their activation by the plasmin pathway. Overexpression of TGF-beta1 controlled length in formed AAAs (17.3 ± 9.6 vs. 5.9 ± 7.4mm, P=0.022), but not VSMC seeding, although both therapies efficiently prevented further diameter increase. Length and diameter correlation was lost after biotherapies. CONCLUSION Length increases in correlation with diameter during AAA formation and expansion, as a consequence of ECM injury driven by MMPs activated by the plasmin pathway. Correlation between length and diameter increases is not universally preserved.
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MESH Headings
- Analysis of Variance
- Animals
- Aorta, Abdominal/metabolism
- Aorta, Abdominal/pathology
- Aorta, Abdominal/surgery
- Aortic Aneurysm, Abdominal/metabolism
- Aortic Aneurysm, Abdominal/pathology
- Aortic Aneurysm, Abdominal/surgery
- Disease Models, Animal
- Extracellular Matrix/pathology
- Guinea Pigs
- Muscle, Smooth, Vascular/cytology
- Plasminogen Activator Inhibitor 1/metabolism
- Rats
- Statistics, Nonparametric
- Tissue Inhibitor of Metalloproteinase-1/metabolism
- Transforming Growth Factor beta1/metabolism
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Affiliation(s)
- S Michineau
- CNRS EAC 7054, Centre de Recherches Chirurgicales Dominique Chopin, University Paris, 12 Val de Marne, 8 Rue du Général Sarrail, 94010 Créteil Cedex, France
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184
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Deng Y, Ji G, Kang Y, Jiang T, Dai J, Qin E, Guo Y, Qin C. Characterization of a novel neutralizing monoclonal antibody that recognizes the fusion loop of Flavivirus envelope protein. Int J Infect Dis 2010. [DOI: 10.1016/j.ijid.2010.02.1591] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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185
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186
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Wu Y, Dai J, Schmuckler NG, Bakdash N, Yoder MC, Overall CM, Colman RW. Cleaved high molecular weight kininogen inhibits tube formation of endothelial progenitor cells via suppression of matrix metalloproteinase 2. J Thromb Haemost 2010; 8:185-93. [PMID: 19874467 PMCID: PMC3142619 DOI: 10.1111/j.1538-7836.2009.03662.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
BACKGROUND AND OBJECTIVE Endothelial progenitor cells (EPCs) contribute to postnatal neovascularization, thus promoting wide interest in their therapeutic potential in vascular injury and prevention of their dysfunction in cardiovascular diseases. Cleaved high molecular weight kininogen (HKa), an activation product of the plasma kallikrein-kinin system (KKS), inhibits the functions of differentiated endothelial cells including in vitro and in vivo angiogenesis. In this study, our results provided the first evidence that HKa is able to target EPCs and inhibits their tube forming capacity. METHODS AND RESULTS We determined the effect of HKa on EPCs using a three-dimensional vasculogenesis assay. Upon stimulation with vascular endothelial growth factor (VEGF) alone, EPCs formed vacuoles and tubes, and differentiated into capillary-like networks. As detected by gelatinolytic activity assay, VEGF stimulated secretion and activation of matrix metallopeptidase 2 (MMP-2), but not MMP-9, in the conditioned medium of 3D culture of EPCs. Specific inhibition or gene ablation of MMP-2, but not MMP-9, blocked the vacuole and tube formation by EPCs. Thus, MMP-2 is selectively required for EPC vasculogenesis. In a concentration-dependent manner, HKa significantly inhibited tube formation by EPCs and the conversion of pro-MMP-2 to MMP-2. Moreover, HKa completely blocked the association between pro-MMP-2 and alphavbeta3 integrin, and its inhibition of MMP-2 activation was dependent on the presence of alphavbeta3 integrin. In a purified system, HKa did not directly inhibit MMP-2 activity. CONCLUSIONS HKa inhibits tube forming capacity of EPCs by suppression of MMP-2 activation, which may constitute a novel link between activation of the KKS and EPC dysfunction.
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Affiliation(s)
- Y Wu
- The Sol Sherry Thrombosis Research Center, Temple University School of Medicine, Philadelphia, PA 19140, USA.
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187
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Grezda A, Mema V, Jaho J, Dai J. Traumatic corneal flap displacement five years after laser in situ keratomileusis. Hippokratia 2010; 14:48-50. [PMID: 20411061 PMCID: PMC2843572] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Laser in Situ Keratomileusis (LASIK) is the most common surgical procedure for the correction of refractive deviations. LASIK has been ongoing lately in our country, exclusively in private settings. This is the reason for which our clinic has no experience with LASIK procedure and complications following it. We are presenting a case of a 23 year-old female with traumatic flap displacement on the left eye, 5 years after the original LASIK operation. She was presented to our clinic on the 6th posttraumatic day. The patient was immediately operated and the flap repositioned. The case we present, is the only one treated to our clinic with such a vision-threatening complication of LASIK procedure.
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Affiliation(s)
- A Grezda
- Service of Ophthalmology, University Hospital Centre Mother Theresa, Tirana, Albania.
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188
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Wu Y, Dai J, Schmuckler NG, Bakdash N, Yoder MC, Overall CM, Colman RW. Cleaved high molecular weight kininogen inhibits tube formation of endothelial progenitor cells via suppression of matrix metalloproteinase 2. J Thromb Haemost 2009. [PMID: 19874467 DOI: 10.1111/j.1538-7836.2009.03662] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
BACKGROUND AND OBJECTIVE Endothelial progenitor cells (EPCs) contribute to postnatal neovascularization, thus promoting wide interest in their therapeutic potential in vascular injury and prevention of their dysfunction in cardiovascular diseases. Cleaved high molecular weight kininogen (HKa), an activation product of the plasma kallikrein-kinin system (KKS), inhibits the functions of differentiated endothelial cells including in vitro and in vivo angiogenesis. In this study, our results provided the first evidence that HKa is able to target EPCs and inhibits their tube forming capacity. METHODS AND RESULTS We determined the effect of HKa on EPCs using a three-dimensional vasculogenesis assay. Upon stimulation with vascular endothelial growth factor (VEGF) alone, EPCs formed vacuoles and tubes, and differentiated into capillary-like networks. As detected by gelatinolytic activity assay, VEGF stimulated secretion and activation of matrix metallopeptidase 2 (MMP-2), but not MMP-9, in the conditioned medium of 3D culture of EPCs. Specific inhibition or gene ablation of MMP-2, but not MMP-9, blocked the vacuole and tube formation by EPCs. Thus, MMP-2 is selectively required for EPC vasculogenesis. In a concentration-dependent manner, HKa significantly inhibited tube formation by EPCs and the conversion of pro-MMP-2 to MMP-2. Moreover, HKa completely blocked the association between pro-MMP-2 and alphavbeta3 integrin, and its inhibition of MMP-2 activation was dependent on the presence of alphavbeta3 integrin. In a purified system, HKa did not directly inhibit MMP-2 activity. CONCLUSIONS HKa inhibits tube forming capacity of EPCs by suppression of MMP-2 activation, which may constitute a novel link between activation of the KKS and EPC dysfunction.
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Affiliation(s)
- Y Wu
- The Sol Sherry Thrombosis Research Center, Temple University School of Medicine, Philadelphia, PA 19140, USA.
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189
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Shen Z, Wang X, Zhu Y, Zhang R, Sun F, Shao Y, Rui W, He W, Dai J. UP-1.016: Retroperitoneoscopic Partial Adrenalectomy for Aldosteronoma: Clinical Experiences with 163 Cases. Urology 2009. [DOI: 10.1016/j.urology.2009.07.463] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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190
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He H, Shen Z, Zhou W, He W, Zhao J, Dai J. UP-3.124: Investigation on Erectile Function in Male Patients with Adrenal Tumors. Urology 2009. [DOI: 10.1016/j.urology.2009.07.128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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191
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Shen Z, He H, Dai J, Zhao J. MP-14.05: Erectile Function in Male Patients with Adrenal Tumors. Urology 2009. [DOI: 10.1016/j.urology.2009.07.856] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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192
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Shen Z, Wang X, Zhu Y, Zhang R, Sun F, Shao Y, Rui W, He W, Dai J. VID-03.02: Retroperitoneoscopic Partial Adrenalectomy for Small Adrenal Tumors (≤1cm): The Rui-jin Clinical Experience in 96 Procedures. Urology 2009. [DOI: 10.1016/j.urology.2009.07.717] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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193
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Abstract
OBJECTIVE Published dosing guidelines for treatment of Seasonal Affective Disorder (SAD) refer to photopic lux, which is not appropriate for short-wavelength light. Short wavelengths are most potent for many non-visual responses to light. If SAD therapy were similarly mediated, standards utilizing lux risk overestimating necessary dose. We investigated antidepressant responses to light using two light-emitting diode (LED) sources, each emitting substantial short-wavelength light, but <2500 lux. METHOD A randomized, double-blind trial investigated 3-week 45 min/day out-patient treatment with blue-appearing (goLITE) or blue-enriched white-appearing light in 18 moderately-depressed adults (12F, 49.1 +/- 9.5 years). Equivalent numbers of photons within the short-wavelength range were emitted, but the white source emitted twice as many photons overall and seven-fold more lux. RESULTS Depression ratings (SIGH-ADS; http://www.cet.org) decrease averaged 82% (SD = 17%) from baseline (P < 0.0001) in both white- and blue-light groups. Both sources were well tolerated. CONCLUSION Short-wavelength LED light sources may be effective in SAD treatment at fewer lux than traditional fluorescent sources.
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Affiliation(s)
- J L Anderson
- Department of Psychiatry, Brigham & Women's Hospital and Harvard Medical School, Boston, MA 02115, USA.
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194
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Abstract
BACKGROUND AND STUDY AIMS Double-balloon enteroscopy (DBE) has been suggested to be more efficient if based on the results of screening video capsule endoscopy (VCE). We evaluated the utility of VCE for predicting the best insertion route of DBE for the evaluation and treatment of small-bowel lesions. PATIENTS AND METHODS Results of studies of patients with complete VCE examination of the small bowel and with findings confirmed by DBE are reported. A location index of lesions found on VCE was defined as the time from the pylorus to the lesion as a percentage of the time from the pylorus to the ileocecal valve. Based on our previous retrospective evaluation, a cut-off value of 0.6 was adopted, and the oral or anal approach was selected when the index was < or = 0.6 or > 0.6, respectively. RESULTS Data from 60 patients who underwent both VCE and DBE examinations and in whom the capsule reached the cecum were evaluated. Lesions shown on VCE were all reached by the first DBE procedures (41 orally and 19 anally). Based on the time index cut-off value of 0.6, the accuracy of selecting the insertion route of DBE was 100 %. CONCLUSION DBE is an effective approach for confirming VCE results. In patients with complete small-bowel investigation by VCE, the best insertion route for DBE can be reliably indicated using a time index based on the VCE records.
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Affiliation(s)
- X Li
- Department of Gastroenterology, Shanghai Renji Hospital, Shanghai 200001, China
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195
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Dai J, Peng L, Fan K, Wang H, Wei R, Ji G, Cai J, Lu B, Li B, Zhang D, Kang Y, Tan M, Qian W, Guo Y. Osteopontin induces angiogenesis through activation of PI3K/AKT and ERK1/2 in endothelial cells. Oncogene 2009; 28:3412-22. [PMID: 19597469 DOI: 10.1038/onc.2009.189] [Citation(s) in RCA: 237] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Angiogenesis is a key step in tumor growth and metastasis. The mechanism by which osteopontin (OPN) induces the angiogenesis of endothelial cells remains unclear. Here, we show that OPN confers cytoprotection through the activation of the PI3K/Akt pathway with subsequent upregulation of Bcl-xL and activation of nuclear factor-kappaB. OPN enhances the expression of vascular endothelial growth factor (VEGF) through the phosphorylation of AKT and extracellular signal-regulated kinase (ERK). In turn, OPN-induced VEGF activates PI3K/AKT and the ERK1/2 pathway as a positive feedback signal. Blocking the feedback signal by anti-VEGF antibody, PI3-kinase inhibitor or ERK inhibitor can partially inhibit the OPN-induced human umbilical vein endothelial cell (HUVEC) motility, proliferation and tube formation, while blocking the signal by anti-OPN or anti-alphavbeta3 antibody completely abrogates the biological effects of OPN on HUVECs. In addition, blood vessel formation is also investigated in vivo. The antiangiogenesis efficacy of anti-OPN antibody in vivo is more effective than that of anti-VEGF antibody, which only blocks the feedback signals. These data show that OPN enhances angiogenesis directly through PI3K/AKT- and ERK-mediated pathways with VEGF acting as a positive feedback signal. The results suggest that OPN might be a valuable target for developing novel antiangiogenesis therapy for treatment of cancer.
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Affiliation(s)
- J Dai
- International Joint Cancer Institute and General Hospital Cancer Center, The Second Military Medical University, Shanghai, PR China
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196
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Dai J, Han Y, Xu B, Li Y, Liu J, Zhao Y, Zhang F. Ultrastructural changes of nucleoli in common wheat induced by actinomycin DPeople's Republic of China. Biotech Histochem 2009; 80:223-5. [PMID: 16720523 DOI: 10.1080/10520290600602285] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
Abstract
Common wheat root tip meristematic cells were treated with low concentrations of actinomycin D (ActD), then stained whole by silver nitrate. We showed by transmission electron microscopy that the typical nucleolar structure did not form, but a granular and fibrillar network was exhibited in the nucleolar region. Our results support a correlation between nucleolar organization/assembly and the activation of RNA Polymerase I transcription. Furthermore, we speculate that the fibrillar network present in the nucleolar region of ActD treated cells may represent the basic skeletal structure required to support the nucleolus.
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Affiliation(s)
- J Dai
- College of Life Science, Capital Normal University, Beijing, 100037, People's Republic of China
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197
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Yu T, Wang X, Ding Q, Fu Q, Dai J, Lu Y, Xi X, Wang H. Using a minigene approach to characterize a novel splice site mutation in human F7 gene causing inherited factor VII deficiency in a Chinese pedigree. Haemophilia 2009; 15:1262-6. [PMID: 19601987 DOI: 10.1111/j.1365-2516.2009.02064.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
Factor VII deficiency which transmitted as an autosomal recessive disorder is a rare haemorrhagic condition. The aim of this study was to identify the molecular genetic defect and determine its functional consequences in a Chinese pedigree with FVII deficiency. The proband was diagnosed as inherited coagulation FVII deficiency by reduced plasma levels of FVII activity (4.4%) and antigen (38.5%). All nine exons and their flanking sequence of F7 gene were amplified by polymerase chain reaction (PCR) for the proband and the PCR products were directly sequenced. The compound heterozygous mutations of F7 (NM_000131.3) c.572-1G>A and F7 (NM_000131.3) c.1165T>G; p.Cys389Gly were identified in the proband's F7 gene. To investigate the splicing patterns associated with F7 c.572-1G>A, ectopic transcripts in leucocytes of the proband were analyzed. F7 minigenes, spanning from intron 4 to intron 7 and carrying either an A or a G at position -1 of intron 5, were constructed and transiently transfected into human embryonic kidney (HEK) 293T cells, followed by RT-PCR analysis. The aberrant transcripts from the F7 c.572-1G>A mutant allele were not detected by ectopic transcription study. Sequencing of the RT-PCR products from the mutant transfectant demonstrated the production of an erroneously spliced mRNA with exon 6 skipping, whereas a normal splicing occurred in the wide type transfectant. The aberrant mRNA produced from the F7 c.572-1G>A mutant allele is responsible for the factor VII deficiency in this pedigree.
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Affiliation(s)
- T Yu
- State Key Laboratory of Medical Genomics, Shanghai Institute of Hematology, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
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198
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Zhang L, Wang Y, Dai J, Tang Y, Yang Q, Luo X, Fang C. Bacillus korlensis sp. nov., a moderately halotolerant bacterium isolated from a sand soil sample in China. Int J Syst Evol Microbiol 2009; 59:1787-92. [DOI: 10.1099/ijs.0.004879-0] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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199
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Peng F, Liu M, Zhang L, Dai J, Luo X, An H, Fang C. Planobacterium taklimakanense gen. nov., sp. nov., a member of the family Flavobacteriaceae that exhibits swimming motility, isolated from desert soil. Int J Syst Evol Microbiol 2009; 59:1672-8. [DOI: 10.1099/ijs.0.006619-0] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
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200
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An H, Zhang L, Tang Y, Luo X, Sun T, Li Y, Wang Y, Dai J, Fang C. Skermanella xinjiangensis sp. nov., isolated from the desert of Xinjiang, China. Int J Syst Evol Microbiol 2009; 59:1531-4. [DOI: 10.1099/ijs.0.003350-0] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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