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Nwosu A, Qian M, Phillips J, Hellegers CA, Rushia S, Sneed J, Petrella JR, Goldberg TE, Devanand DP, Doraiswamy PM. Computerized Cognitive Training in Mild Cognitive Impairment: Findings in African Americans and Caucasians. J Prev Alzheimers Dis 2024; 11:149-154. [PMID: 38230727 DOI: 10.14283/jpad.2023.80] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2024]
Abstract
BACKGROUND African Americans with MCI may be at increased risk for dementia compared to Caucasians. The effect of race on the efficacy of cognitive training in MCI is unclear. METHODS We used data from a two-site, 78-week randomized trial of MCI comparing intensive, home-based, computerized training with Web-based cognitive games or Web-based crossword puzzles to examine the effect of race on outcomes. The study outcomes were changes from baseline in cognitive and functional scales as well as MRI-measured changes in hippocampal volume and cortical thickness. Analyses used linear models adjusted for baseline scores. This was an exploratory study. RESULTS A total of 105 subjects were included comprising 81 whites (77.1%) and 24 African Americans (22.8%). The effect of race on the change from baseline in ADAS-Cog-11 was not significant. The effect of race on change from baseline to week 78 in the Functional Activities Questionnaire (FAQ) was significant with African American participants' FAQ scores showing greater improvements at weeks 52 and 78 (P = 0.009, P = 0.0002, respectively) than white subjects. Within the CCT cohort, FAQ scores for African American participants showed greater improvement between baseline and week 78, compared to white participants randomized to CCT (P = 0.006). There was no effect of race on the UPSA. There was no effect of race on hippocampal or cortical thickness outcomes. CONCLUSIONS Our preliminary findings suggest that web-based cognitive training programs may benefit African Americans with MCI at least as much as Caucasians, and highlight the need to further study underrepresented minorities in AD prevention trials. (Supported by the National Institutes of Health, National Institute on Aging; ClinicalTrials.gov number, NCT03205709.).
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Affiliation(s)
- A Nwosu
- Adaora Nwosu, Neurocognitive Disorders Program, Department of Psychiatry and Behavioral Sciences, Duke University School of Medicine, Durham, NC, USA,
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Motter JN, Rushia SN, Qian M, Ndouli C, Nwosu A, Petrella JR, Doraiswamy PM, Goldberg TE, Devanand DP. Expectancy Does Not Predict 18-month Treatment Outcomes with Cognitive Training in Mild Cognitive Impairment. J Prev Alzheimers Dis 2024; 11:71-78. [PMID: 38230719 DOI: 10.14283/jpad.2023.62] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2024]
Abstract
BACKGROUND Computerized cognitive training (CCT) has emerged as a potential treatment option for mild cognitive impairment (MCI). It remains unclear whether CCT's effect is driven in part by expectancy of improvement. OBJECTIVES This study aimed to determine factors associated with therapeutic expectancy and the influence of therapeutic expectancy on treatment effects in a randomized clinical trial of CCT versus crossword puzzle training (CPT) for older adults with MCI. DESIGN Randomized clinical trial of CCT vs CPT with 78-week follow-up. SETTING Two-site study - New York State Psychiatric Institute and Duke University Medical Center. PARTICIPANTS 107 patients with MCI. INTERVENTION 12 weeks of intensive training with CCT or CPT with follow-up booster training over 78 weeks. MEASUREMENTS Patients rated their expectancies for CCT and CPT prior to randomization. RESULTS Patients reported greater expectancy for CCT than CPT. Lower patient expectancy was associated with lower global cognition at baseline and older age. Expectancy did not differ by sex or race. There was no association between expectancy and measures of everyday functioning, hippocampus volume, or apolipoprotein E genotype. Expectancy was not associated with change in measures of global cognition, everyday functioning, and hippocampus volume from baseline to week 78, nor did expectancy interact with treatment condition. CONCLUSIONS While greater cognitive impairment and increased age was associated with low expectancy of improvement, expectancy was not associated with the likelihood of response to treatment with CPT or CCT.
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Affiliation(s)
- J N Motter
- Jeffrey N. Motter, Department of Psychiatry, Division of Geriatric Psychiatry, 1051 Riverside Drive, New York, NY 10032, United States.
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Zhong HZ, Li CW, Das R, Gu JF, Qian M. Post-yield softening of bending-dominated metal metamaterials. PNAS Nexus 2023; 2:pgad082. [PMID: 37091545 PMCID: PMC10113875 DOI: 10.1093/pnasnexus/pgad082] [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] [Received: 01/21/2023] [Revised: 02/24/2023] [Accepted: 02/28/2023] [Indexed: 03/17/2023]
Abstract
Abstract
Post-yield softening (PYS) plays an important role in guiding the design of high-performance energy-absorbing lattice materials. PYS is usually restricted to lattice materials that are stretching-dominated according to the Gibson-Ashby model. Contrary to this long-held assumption, this work shows that PYS can also occur in various bending-dominated Ti-6Al-4 V lattices with increasing relative density. The underlying mechanism for this unusual property is elucidated using the Timoshenko-beam theory. It is attributed to the increase in stretching and shear deformation with increasing relative density, thereby increasing the tendency towards PYS. The finding of this work extends perspectives on PYS for the design of high-performance energy-absorbing lattice materials.
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Affiliation(s)
- H Z Zhong
- Institute of Materials Modification and Modelling, Shanghai Jiao Tong University , Shanghai 200240 , China
- Centre for Additive Manufacturing, School of Engineering, RMIT University , Melbourne, VIC 3000 , Australia
| | - C W Li
- Institute of Materials Modification and Modelling, Shanghai Jiao Tong University , Shanghai 200240 , China
| | - R Das
- Centre for Additive Manufacturing, School of Engineering, RMIT University , Melbourne, VIC 3000 , Australia
- Sir Lawrence Wackett Aerospace Research Centre, School of Engineering, RMIT University , GPO Box 2476, Melbourne, VIC 3001 , Australia
| | - J F Gu
- Institute of Materials Modification and Modelling, Shanghai Jiao Tong University , Shanghai 200240 , China
| | - M Qian
- Centre for Additive Manufacturing, School of Engineering, RMIT University , Melbourne, VIC 3000 , Australia
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Zhong HZ, Li CW, Das R, Gu JF, Qian M. Post-yield softening of bending-dominated metal metamaterials. PNAS Nexus 2023; 2:pgad075. [PMID: 37007715 PMCID: PMC10053022 DOI: 10.1093/pnasnexus/pgad075] [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] [Received: 01/21/2023] [Revised: 02/24/2023] [Accepted: 02/28/2023] [Indexed: 03/12/2023]
Abstract
Abstract
Post-yield softening (PYS) plays an important role in guiding the design of high-performance energy-absorbing lattice materials. PYS is usually restricted to lattice materials that are stretching-dominated according to the Gibson-Ashby model. Contrary to this long-held assumption, this work shows that PYS can also occur in various bending-dominated Ti-6Al-4V lattices with increasing relative density. The underlying mechanism for this unusual property is elucidated using the Timoshenko-beam theory. It is attributed to the increase in stretching and shear deformation with increasing relative density, thereby increasing the tendency towards PYS. The finding of this work extends perspectives on PYS for the design of high-performance energy-absorbing lattice materials.
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Affiliation(s)
- H Z Zhong
- Institute of Materials Modification and Modelling, Shanghai Jiao Tong University , Shanghai 200240 , China
- Centre for Additive Manufacturing, School of Engineering, RMIT University , Melbourne, VIC 3000 , Australia
| | - C W Li
- Institute of Materials Modification and Modelling, Shanghai Jiao Tong University , Shanghai 200240 , China
| | - R Das
- Centre for Additive Manufacturing, School of Engineering, RMIT University , Melbourne, VIC 3000 , Australia
- Sir Lawrence Wackett Aerospace Research Centre, School of Engineering, RMIT University , GPO Box 2476, Melbourne, VIC 3001 , Australia
| | - J F Gu
- Institute of Materials Modification and Modelling, Shanghai Jiao Tong University , Shanghai 200240 , China
| | - M Qian
- Centre for Additive Manufacturing, School of Engineering, RMIT University , Melbourne, VIC 3000 , Australia
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Man J, Cao P, Wang H, Qian X, Miao H, Zhu X, Jiang J, Jiang W, Qian M, Zhai X. REPORT OF SYSTEMIC EBV-POSITIVE T-CELL LYMPHOMA OF CHILDHOOD ASSOCIATED WITH XMEN DISEASE CAUSED BY A NOVEL MUTATION. Leuk Res 2022. [DOI: 10.1016/s0145-2126(22)00283-1] [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]
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Paz-Ares L, Johnson M, Girard N, Hann C, Ahn MJ, Nishio M, Godard J, Laadem A, Yoshizuka N, Qian M, Cheng B, Rudin C. 1550TiP Phase II, multicenter, randomized, open-label study of DS-7300 in patients (pts) with pre-treated extensive-stage small cell lung cancer (ES-SCLC). Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.07.1644] [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: 11/16/2022] Open
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Doi T, Patel M, Falchook G, Koyama T, Friedman C, Piha-Paul S, Gutierrez M, Abdul-Karim R, Awad M, Adkins D, Takahashi S, Kadowaki S, Cheng B, Ikeda N, Laadem A, Yoshizuka N, Qian M, Dosunmu O, Arkenau HT, Johnson M. 453O DS-7300 (B7-H3 DXd antibody-drug conjugate [ADC]) shows durable antitumor activity in advanced solid tumors: Extended follow-up of a phase I/II study. Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.07.582] [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: 11/01/2022] Open
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Lin Y, Xie M, Qian M, Gao L, Ji MM, Li Y. Cardiac fibroma: characteristics on echocardiography and cardiac magnetic resonance imaging. QJM 2022; 115:412-414. [PMID: 35260886 DOI: 10.1093/qjmed/hcac062] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Revised: 02/22/2022] [Indexed: 11/12/2022] Open
Affiliation(s)
- Y Lin
- Department of Ultrasound Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277# Jiefang Ave, Wuhan, 430022, China
- Clinical Research Center for Medical Imaging in Hubei Province, 1277# Jiefang Ave, Wuhan, 430022, China
- Hubei Province Key Laboratory of Molecular Imaging, 1277# Jiefang Ave, Wuhan, 430022, China
| | - M Xie
- Department of Ultrasound Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277# Jiefang Ave, Wuhan, 430022, China
- Clinical Research Center for Medical Imaging in Hubei Province, 1277# Jiefang Ave, Wuhan, 430022, China
- Hubei Province Key Laboratory of Molecular Imaging, 1277# Jiefang Ave, Wuhan, 430022, China
| | - M Qian
- Department of Ultrasound Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277# Jiefang Ave, Wuhan, 430022, China
- Clinical Research Center for Medical Imaging in Hubei Province, 1277# Jiefang Ave, Wuhan, 430022, China
- Hubei Province Key Laboratory of Molecular Imaging, 1277# Jiefang Ave, Wuhan, 430022, China
| | - L Gao
- Department of Ultrasound Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277# Jiefang Ave, Wuhan, 430022, China
- Clinical Research Center for Medical Imaging in Hubei Province, 1277# Jiefang Ave, Wuhan, 430022, China
- Hubei Province Key Laboratory of Molecular Imaging, 1277# Jiefang Ave, Wuhan, 430022, China
| | - M M Ji
- Department of Ultrasound Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277# Jiefang Ave, Wuhan, 430022, China
- Clinical Research Center for Medical Imaging in Hubei Province, 1277# Jiefang Ave, Wuhan, 430022, China
- Hubei Province Key Laboratory of Molecular Imaging, 1277# Jiefang Ave, Wuhan, 430022, China
| | - Y Li
- Department of Ultrasound Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277# Jiefang Ave , Wuhan, 430022, China
- Clinical Research Center for Medical Imaging in Hubei Province, 1277# Jiefang Ave, Wuhan , 430022, China
- Hubei Province Key Laboratory of Molecular Imaging, 1277# Jiefang Ave, Wuhan, 430022, China
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Wu SJ, Liu XH, Wu W, Qian M, Li L, Zhang L, Yang HH, Guan M, Cao J, Wang YN, Ruan GR, Niu N, Liu YX. [Tocilizumab therapy for immune checkpoint inhibitor associated myocarditis: a case report]. Zhonghua Xin Xue Guan Bing Za Zhi 2022; 50:397-400. [PMID: 35399037 DOI: 10.3760/cma.j.cn112148-20210511-00412] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Affiliation(s)
- S J Wu
- Department of Medicine, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - X H Liu
- Department of Medicine, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - W Wu
- Department of Cardiology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - M Qian
- Department of Neurology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - L Li
- Department of Cardiology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - L Zhang
- Department of Respiratory and Critical Care Medicine, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - H H Yang
- Department of Rheumatology and Immunology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - M Guan
- Department of Oncology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - J Cao
- Department of Radiology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Y N Wang
- Department of Radiology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - G R Ruan
- Department of Infectious Disease, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - N Niu
- Department of Nuclear Medicine, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Y X Liu
- Department of Cardiology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
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Smith JL, Tran N, Song T, Liang D, Qian M. Robust bulk micro-nano hierarchical copper structures possessing exceptional bactericidal efficacy. Biomaterials 2021; 280:121271. [PMID: 34864450 DOI: 10.1016/j.biomaterials.2021.121271] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Revised: 11/01/2021] [Accepted: 11/22/2021] [Indexed: 12/29/2022]
Abstract
Conventional copper (Cu) metal surfaces are well recognized for their bactericidal properties. However, their slow bacteria-killing potency has historically excluded them as a rapid bactericidal material. We report the development of a robust bulk superhydrophilic micro-nano hierarchical Cu structure that possesses exceptional bactericidal efficacy. It resulted in a 4.41 log10 reduction (>99.99%) of the deadly Staphylococcus aureus (S. aureus) bacteria within 2 min vs. a 1.49 log10 reduction (96.75%) after 240 min on common Cu surfaces. The adhered cells exhibited extensive blebbing, loss of structural integrity and leakage of vital intracellular material, demonstrating the rapid efficacy of the micro-nano Cu structure in destructing bacteria membrane integrity. The mechanism was attributed to the synergistic degradation of the cell envelope through enhanced release and therefore uptake of the cytotoxic Cu ions and the adhesion-driven mechanical strain due to its rapid ultimate superhydrophilicity (contact angle drops to 0° in 0.18 s). The scalable fabrication of this micro-nano Cu structure was enabled by integrating bespoke precursor alloy design with microstructure preconditioning for dealloying and demonstrated on 2000 mm2 Cu surfaces. This development paves the way to the practical exploitation of Cu as a low-cost antibiotic-free fast bactericidal material.
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Affiliation(s)
- J L Smith
- RMIT University, School of Engineering, Melbourne, Victoria, 3000, Australia; CSIRO, Manufacturing, Clayton, Victoria, 3168, Australia
| | - N Tran
- RMIT University, School of Science, Melbourne, Victoria, 3000, Australia
| | - T Song
- RMIT University, School of Engineering, Melbourne, Victoria, 3000, Australia
| | - D Liang
- CSIRO, Manufacturing, Clayton, Victoria, 3168, Australia
| | - M Qian
- RMIT University, School of Engineering, Melbourne, Victoria, 3000, Australia.
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11
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Wang Q, Long ZB, Qian M, Feng J, Guo XX, Yang AM, You Y, Fei GJ. [The 486th case: chronic diarrhea and orthostatic hypotension]. Zhonghua Nei Ke Za Zhi 2021; 60:284-288. [PMID: 33663184 DOI: 10.3760/cma.j.cn112138-20200318-00260] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
A 57-year-old man was admitted to hospital with diarrhea for 10 months and dizziness for 4 months. The patient had 1-2 liters watery stool per day, without pyogenic blood or abnormality in gastroenteroscopy examination. The level of hemoglobin and albumin was generally normal, and fasting test was positive. At the same time, he was accompanied with hyperalgesia of lower limbs and orthostatic hypotension. After the discussion of multiple disciplinary teams, the patient was diagnosed with amyloidosis by sural nerve biopsy, myocardial MRI, and the assays of urine immunoelectrophoresis and serum free light chain. Light chain amyloidosis was confirmed after excluded the diagnosis of familial amyloidosis. The patient was improved after courses of chemotherapy with melphalan and dexamethasone.
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Affiliation(s)
- Q Wang
- Department of Gastroenterology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Z B Long
- Department of Hematology, the First Affiliated Hospital of Anhui Medical University, Hefei 230022, China
| | - M Qian
- Department of Neurology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - J Feng
- Department of Hematology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - X X Guo
- Department of Cardiology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - A M Yang
- Department of Gastroenterology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Y You
- Department of Pathology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - G J Fei
- Department of Gastroenterology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
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12
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Qian M, Zheng JL, Kang N, Su YL. Down-regulation of long noncoding RNA PGM5-AS1 correlates with tumor progression and predicts poor prognosis in clear cell renal cell carcinoma. Eur Rev Med Pharmacol Sci 2021; 23:10685-10690. [PMID: 31858536 DOI: 10.26355/eurrev_201912_19767] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE Growing studies have shown that long non-coding RNAs (lncRNAs) have critical regulatory roles in tumorigenesis. Recently, a newly identified lncRNA, Homo sapiens PGM5 antisense RNA 1 (PGM5-AS1), was found to be dysregulated in several tumors. However, its roles in clear cell renal cell carcinoma (ccRCC) have not been investigated. The aim of the present study was to clarify the clinical significance of PGM5-AS1 in ccRCC patients. PATIENTS AND METHODS The PGM5-AS1 expression levels were evaluated in 182 primary ccRCC patients using quantitative real-time PCR assays. The associations between expression of PGM5-AS1, clinicopathological parameters, and prognosis of ccRCC were examined using Chi-square test, Kaplan-Meier assays, and multivariate assays. RESULTS The expressions of PGM5-AS1 in cancer specimens were lower than those in matched non-tumor specimens from the ccRCC patient (p<0.05). Downregulation of PGM5-AS1 was closely associated with more advanced clinical features, including lymph nodes metastasis (p=0.007) and distant metastasis (p=0.037). A clinical study revealed that ccRCC patients with lower PGM5-AS1 expressions had substantially shorter overall survival (OS) and disease-free survival (DFS) than patients with higher PGM5-AS1 expressions. Further multivariate assays demonstrated that PGM5-AS1 was identified as an independent prognostic factor for patients with ccRCC. CONCLUSIONS Down-regulation of PGM5-AS1 in ccRCC tissues had a strong association with unfavorable outcomes and PGM5-AS1 might be a potential tumor suppressor.
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Affiliation(s)
- M Qian
- Department of Laboratory, Jinan First People's Hospital, Jinan, Shandong, China.
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Zhang Z, Fisher AS, Hoffmann MC, Jacobson B, Kirchmann PS, Lee WS, Lindenberg A, Marinelli A, Nanni E, Schoenlein R, Qian M, Sasaki S, Xu J, Huang Z. A high-power, high-repetition-rate THz source for pump-probe experiments at Linac Coherent Light Source II. J Synchrotron Radiat 2020; 27:890-901. [PMID: 33565997 PMCID: PMC7336180 DOI: 10.1107/s1600577520005147] [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] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Accepted: 04/13/2020] [Indexed: 06/12/2023]
Abstract
Experiments using a THz pump and an X-ray probe at an X-ray free-electron laser (XFEL) facility like the Linac Coherent Light Source II (LCLS II) require frequency-tunable (3 to 20 THz), narrow bandwidth (∼10%), carrier-envelope-phase-stable THz pulses that produce high fields (>1 MV cm-1) at the repetition rate of the X-rays and are well synchronized with them. In this paper, a two-bunch scheme to generate THz radiation at LCLS II is studied: the first bunch produces THz radiation in an electromagnet wiggler immediately following the LCLS II undulator that produces X-rays from the second bunch. The initial time delay between the two bunches is optimized to compensate for the path difference in THz transport. The two-bunch beam dynamics, the THz wiggler and radiation are described, as well as the transport system bringing the THz pulses from the wiggler to the experimental hall.
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Affiliation(s)
- Z. Zhang
- SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
| | - A. S. Fisher
- SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
| | - M. C. Hoffmann
- SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
| | - B. Jacobson
- SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
| | - P. S. Kirchmann
- SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
| | - W.-S. Lee
- SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
| | - A. Lindenberg
- SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
| | - A. Marinelli
- SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
| | - E. Nanni
- SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
| | - R. Schoenlein
- SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
| | - M. Qian
- Argonne National Laboratory, Lemont, IL 60439, USA
| | - S. Sasaki
- Argonne National Laboratory, Lemont, IL 60439, USA
| | - J. Xu
- Argonne National Laboratory, Lemont, IL 60439, USA
| | - Z. Huang
- SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
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14
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Gao XM, Jia MN, Qian M, Ren HT, Zhang L, Shen KN, Cao XX, Li J. [Anti-myelin-associated glycoprotein antibody positive IgM monoclonal gammopathy related peripheral neuropathy: 11 cases and literature review]. Zhonghua Xue Ye Xue Za Zhi 2019; 40:901-905. [PMID: 31856437 PMCID: PMC7342372 DOI: 10.3760/cma.j.issn.0253-2727.2019.11.003] [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] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
目的 提高对罕见的抗髓鞘相关糖蛋白(MAG)抗体阳性的IgM相关性周围神经病(IgM-PN)的认识。 方法 总结2014年1月至2019年4月北京协和医院诊断的11例抗MAG抗体阳性的IgM-PN患者的临床特点、实验室检查、治疗方案和预后。 结果 11例患者中,男8例,女3例,中位发病年龄63(52~77)岁。其中9例患者以远端肢体麻木起病,6例伴肌力减退。神经传导速度检查示,均为周围神经脱髓鞘损害,以下肢感觉神经损害为主,6例伴慢性轴索损害。11例患者均存在血清IgM型单克隆免疫球蛋白,6例为IgM κ型,3例为IgM λ型,2例为IgM κ/IgG κ双克隆型。3例患者继发于巨球蛋白血症。11例患者的血清抗MAG抗体均为阳性。9例患者接受利妥昔单抗单药或联合化疗,治疗后7例患者的神经症状稳定或改善。 结论 抗MAG抗体阳性的IgM-PN是一种罕见的M蛋白相关性疾病。对于伴IgM型M蛋白的周围神经病患者,应常规筛查抗MAG抗体。基于利妥昔单抗的治疗可作为其一线治疗方案。
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Affiliation(s)
- X M Gao
- Department of Hematology, Peking Union Medical College Hospital, Chinese Academy of Medicine Sciences, Beijing 100730, China
| | - M N Jia
- Department of Hematology, Peking Union Medical College Hospital, Chinese Academy of Medicine Sciences, Beijing 100730, China
| | - M Qian
- Department of Neurology, Peking Union Medical College Hospital, Chinese Academy of Medicine Sciences, Beijing 100730, China
| | - H T Ren
- Department of Neurology, Peking Union Medical College Hospital, Chinese Academy of Medicine Sciences, Beijing 100730, China
| | - L Zhang
- Department of Hematology, Peking Union Medical College Hospital, Chinese Academy of Medicine Sciences, Beijing 100730, China
| | - K N Shen
- Department of Hematology, Peking Union Medical College Hospital, Chinese Academy of Medicine Sciences, Beijing 100730, China
| | - X X Cao
- Department of Hematology, Peking Union Medical College Hospital, Chinese Academy of Medicine Sciences, Beijing 100730, China
| | - J Li
- Department of Hematology, Peking Union Medical College Hospital, Chinese Academy of Medicine Sciences, Beijing 100730, China
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15
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Qian M, Song NJ. Serum calprotectin correlates with risk and disease severity in psoriasis patients and the decrease of calprotectin predicts better response to tumor necrosis factor inhibitors. Eur Rev Med Pharmacol Sci 2019; 22:4299-4309. [PMID: 30024620 DOI: 10.26355/eurrev_201807_15426] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE This study aimed to investigate the correlation of serum calprotectin expression with risk and severity of psoriasis, as well as its predictive value for clinical response to tumor necrosis factor inhibitors (TNFi) treatment in psoriasis patients. PATIENTS AND METHODS 72 psoriasis patients and 70 health controls (HCs) were enrolled. Blood samples were collected, and serum calprotectin was determined by commercial enzyme-linked immuno sorbent assay (ELISA). All patients were treated by TNFi treatment, and followed up at 6 months, and the last follow-up date was 2016/11. RESULTS Calprotectin level was elevated in psoriasis patients compared to HCs (p < 0.001), and it disclosed a good diagnostic value of psoriasis with area under curve (AUC) 0.872, 95% CI: 0.810-0.935. Calprotectin expression was positively associated with Psoriasis Area and Severity Index (PASI) score (R = 0.452, p < 0.001), while it was not associated with BSA (R = 0.125, p = 0.297). 58.3% patients achieved PASI75 and 43.1% patients achieved PASI90 at M6. Calprotectin was decreased during the 6-month treatment (p < 0.001). Changes of calprotectin during the first month (∆calprotectin (M0-M1)) in PASI75 group were more than that of non-PASI75 group (p < 0.001). Also, multivariate logistic analysis revealed that ∆calprotectin (M0-M1) (p = 0.001) was an independent factor for PASI75 achievement at M6 after TNFi treatment, while pre-systemic biologic treatment (p = 0.001) was an independent factor for non-PASI75 achievement. CONCLUSIONS Serum calprotectin expression is correlated with risk and severity of psoriasis, and the decrease of calprotectin during the first month could predict better clinical response to TNFi treatment in psoriasis patients.
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Affiliation(s)
- M Qian
- Department of Dermatology, Tongren Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.
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16
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Shu B, Zhuo M, Liu Z, Lu Z, Qian M. Cholesterol induces dedifferentiation of vascular smooth muscle cells by regulating monocyte chemotactic protein-1-induced protein 1. Int J Clin Exp Pathol 2019; 12:3258-3267. [PMID: 31934169 PMCID: PMC6949835] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Accepted: 07/25/2019] [Indexed: 06/10/2023]
Abstract
OBJECTIVE To discover the effect of cholesterol on dedifferentiation of VSMCs in vitro and the underlying mechanisms. METHODS Vascular smooth muscle cells (VSMC) were employed to evaluate the role of cholesterol in regulating the dedifferentiation of VSMCs in vitro. Immunofluorescent staining, western blot, and RT-PCR were applied to uncover the inducing effect of cholesterol at a molecular level. RESULTS We demonstrated that the cholesterol was capable of inducing the dedifferentiation of VSMCs. Mechanistic studies revealed that monocyte chemotactic protein-1-induced protein 1 (MCPIP1) composed the most influential factor in the regulation of VSMCs during the process of cholesterol induction. When MCPIP1 was overexpressed in VSMCs, the dedifferentiation, proliferation and migration of the cells was enhanced, and the expression of miR-145 was suppressed. In contrast, knocking down MCPIP1 by siRNA promoted the differentiation and prohibited the migration of VSMCs after cholesterol treatment. These results demonstrate that MCPIP1 plays an important role in regulating cholesterol-induced dedifferentiation of VSMCs in vitro.
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Affiliation(s)
- Bo Shu
- Department of Biochemistry, Zunyi Medical UniversityZunyi, Guizhou, P. R. China
| | - Ming Zhuo
- Department of Biochemistry, Zunyi Medical UniversityZunyi, Guizhou, P. R. China
| | - Zhijiang Liu
- Department of Cardiology, The First Affiliated Hospital, Zunyi Medical UniversityZunyi, Guizhou, P. R. China
| | - Zhe Lu
- Department of Biochemistry, Zunyi Medical UniversityZunyi, Guizhou, P. R. China
| | - Minzhang Qian
- Department of Biochemistry, Zunyi Medical UniversityZunyi, Guizhou, P. R. China
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17
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Zhao FY, Li Q, Zhang DM, Guo ZH, Wu YX, Wang F, Zhang JM, Qian M, Zhu ZY. A novel silent
RHCE
allele in Chinese population. Transfus Med 2019; 29:430-433. [DOI: 10.1111/tme.12624] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2019] [Revised: 06/20/2019] [Accepted: 07/18/2019] [Indexed: 12/26/2022]
Affiliation(s)
- F. Y. Zhao
- School of Life ScienceEast China Normal University Minhang Shanghai PR China
- Shanghai Blood Center Changning Shanghai PR China
| | - Q. Li
- Shanghai Blood Center Changning Shanghai PR China
| | - D. M. Zhang
- Blood Group Reference Laboratory, Taiyuan Red Cross Blood Center Taiyuan PR China
| | - Z. H. Guo
- Shanghai Blood Center Changning Shanghai PR China
| | - Y. X. Wu
- Blood Group Reference Laboratory, Taiyuan Red Cross Blood Center Taiyuan PR China
| | - F. Wang
- Blood Group Reference Laboratory, Taiyuan Red Cross Blood Center Taiyuan PR China
| | - J. M. Zhang
- Shanghai Blood Center Changning Shanghai PR China
| | - M. Qian
- School of Life ScienceEast China Normal University Minhang Shanghai PR China
| | - Z. Y. Zhu
- Shanghai Blood Center Changning Shanghai PR China
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18
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Abstract
Statistical data have consistently shown that implant loosening is a significant causative factor for revision surgeries. Both in vivo and in vitro studies have confirmed the positive influences of microgrooved titanium implant surfaces on improving orthopedic titanium implants compared with a smooth titanium surface. Complete cell-groove adhesion is a prerequisite for rapid and robust osseointegration. For the first time, this work has quantified the influence of the titanium groove width at the subcellular scale (5-20 μm) on osteoblast responses, using titanium-coated microgrooved silicon wafer specimens (surface roughness, Ra = ∼1.5 nm), which can avoid the latent influence of variations in surface roughness from the use of normal titanium substrates. The cell-groove adhesion increased from 53.07% to 98.55% with an increasing groove width from 5 to 20 μm. In addition, both the cell spreading area and cell width were proportional to groove width. However, no statistically significant influence (p > 0.05) of groove width was identified on cell proliferation and differentiation. An exponential model was proposed to predict the groove geometries that can facilitate complete cell-groove adhesion. The underlying mechanisms were discussed. The experimental findings of this study provide a unique basis for the design of titanium implant surfaces.
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Affiliation(s)
- N Gui
- Centre for Additive Manufacturing, School of Engineering, RMIT University, Melbourne, Victoria 3000, Australia
| | - W Xu
- Centre for Additive Manufacturing, School of Engineering, RMIT University, Melbourne, Victoria 3000, Australia.,School of Engineering, Deakin University, Waurn Ponds, Victoria 3216, Australia
| | - A N Abraham
- Ian Potter NanoBioSensing Facility, Nanobiotechnology Research Laboratory, School of Science, RMIT University, Melbourne, Victoria 3000, Australia
| | - R Shukla
- Ian Potter NanoBioSensing Facility, Nanobiotechnology Research Laboratory, School of Science, RMIT University, Melbourne, Victoria 3000, Australia
| | - M Qian
- Centre for Additive Manufacturing, School of Engineering, RMIT University, Melbourne, Victoria 3000, Australia
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19
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Jiang F, Zeng YQ, Qian M, Cai S, Chen Y, Chen P. [Prevalence and quality of spirometry and the impact of spirometry training in Hunan, People's Republic of China]. Zhonghua Yi Xue Za Zhi 2019; 99:1385-1389. [PMID: 31137125 DOI: 10.3760/cma.j.issn.0376-2491.2019.18.006] [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] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To explore quality of spirometry in Hunan province and the impact of education on it. Methods: Cross-sectional study and a prospective randomized cohort study. (1) A total of 460 public hospitals in Hunan province were investigated. Research assistants collected 20 consecutive reports of pulmonary ventilation test reports (PVTRs) and basal information of those hospitals which owned spirometry. (2) To measure the effect of education, 28 randomly selected 2(nd) level hospitals which owned spirometry were randomized to intervention and control group (1∶1). The intervention group received a short-time training which included face-to-face lectures and a hand-by-hand operation training course, while the control group received usual care. PVTRs were investigated 3 months after the intervention. All PVTRs were classified to grade A, B, C, D and E according to the Chinese pulmonary ventilation test (PVT) guidelines. Results: The recovery rate was 100%. The spirometry-equipped ratio was 1.6% (2/129) at 1(st) level hospitals, 39.0% (105/269) at 2(nd) level hospitals, 100% (62/62) at 3(rd) level hospitals in Hunan province. There were 100% (2/2), 91.4% (96/105) and 93.5% (58/62) utilization rate at 1(st), 2(nd) and 3(rd) level hospitals. Common reasons for not owning a spirometer were equipment cost and insufficient insurance. Lack of knowledge about spirometry and inadequate benefits were the top two reasons for low utilization rate. There were 3 120 PVTRs from 156 hospitals which used spirometry, a total of 50.4% (1 574/3 120) PVTRs got grade A, a total of 14.8% (462/3 120) PVTRs were judged as unreliable (grade D, E). There were 560 PVTRs and 28 questionnaires, respectively, before and after intervention. The technicians' knowledge improved after education compared to before (9.8±0.6 vs 8.6±1.1) (P<0.05). And 75.0% (210/280) PVTRs got A grade in the intervention group, which was significantly higher than those in the control group (75.0% vs 37.9%, P<0.05). While none of PVTRs was unreliable, which was lower than that in the control group (0 vs 14.6%, P<0.05). Conclusions: The equipment ratio and the utilization rate of spirometry are still low and imbalanced among three levels hospitals in Hunan. The short-time training is helpful to improve quality of spirometry.
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Affiliation(s)
- F Jiang
- Department of Respiratory Medicine, the Second Xiangya Hospital of Central South University, Changsha 410000, China
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20
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Xu W, Lu X, Wang L, Shi Z, Lv S, Qian M, Qu X. Mechanical properties, in vitro corrosion resistance and biocompatibility of metal injection molded Ti-12Mo alloy for dental applications. J Mech Behav Biomed Mater 2018; 88:534-547. [DOI: 10.1016/j.jmbbm.2018.08.038] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2018] [Revised: 06/11/2018] [Accepted: 08/27/2018] [Indexed: 11/16/2022]
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21
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Lotan E, Morley C, Newman J, Qian M, Abu-Amara D, Marmar C, Lui YW. Prevalence of Cerebral Microhemorrhage following Chronic Blast-Related Mild Traumatic Brain Injury in Military Service Members Using Susceptibility-Weighted MRI. AJNR Am J Neuroradiol 2018; 39:1222-1225. [PMID: 29794235 PMCID: PMC7655437 DOI: 10.3174/ajnr.a5688] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [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: 02/03/2018] [Accepted: 04/04/2018] [Indexed: 01/14/2023]
Abstract
BACKGROUND AND PURPOSE Cerebral microhemorrhages are a known marker of mild traumatic brain injury. Blast-related mild traumatic brain injury relates to a propagating pressure wave, and there is evidence that the mechanism of injury in blast-related mild traumatic brain injury may be different from that in blunt head trauma. Two recent reports in mixed cohorts of blunt and blast-related traumatic brain injury in military personnel suggest that the prevalence of cerebral microhemorrhages is lower than in civilian head injury. In this study, we aimed to characterize the prevalence of cerebral microhemorrhages in military service members specifically with chronic blast-related mild traumatic brain injury. MATERIALS AND METHODS Participants were prospectively recruited and underwent 3T MR imaging. Susceptibility-weighted images were assessed by 2 neuroradiologists independently for the presence of cerebral microhemorrhages. RESULTS Our cohort included 146 veterans (132 men) who experienced remote blast-related mild traumatic brain injury (mean, 9.4 years; median, 9 years after injury). Twenty-one (14.4%) reported loss of consciousness for <30 minutes. Seventy-seven subjects (52.7%) had 1 episode of blast-related mild traumatic brain injury; 41 (28.1%) had 2 episodes; and 28 (19.2%) had >2 episodes. No cerebral microhemorrhages were identified in any subject, as opposed to the frequency of SWI-detectable cerebral microhemorrhages following blunt-related mild traumatic brain injury in the civilian population, which has been reported to be as high as 28% in the acute and subacute stages. CONCLUSIONS Our results may reflect differences in pathophysiology and the mechanism of injury between blast- and blunt-related mild traumatic brain injury. Additionally, the chronicity of injury may play a role in the detection of cerebral microhemorrhages.
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Affiliation(s)
- E Lotan
- From the Departments of Radiology (E.L., C.M., Y.W.L.)
- Sackler Faculty of Medicine (E.L.), Tel Aviv University, Tel Aviv, Israel
| | - C Morley
- From the Departments of Radiology (E.L., C.M., Y.W.L.)
- Psychiatry (J.N., M.Q., D.A.-A., C.M.), Steven and Alexandra Cohen Veterans Center for Posttraumatic Stress and Traumatic Brain Injury, New York University Langone Medical Center, New York, New York
| | - J Newman
- Psychiatry (J.N., M.Q., D.A.-A., C.M.), Steven and Alexandra Cohen Veterans Center for Posttraumatic Stress and Traumatic Brain Injury, New York University Langone Medical Center, New York, New York
| | - M Qian
- Psychiatry (J.N., M.Q., D.A.-A., C.M.), Steven and Alexandra Cohen Veterans Center for Posttraumatic Stress and Traumatic Brain Injury, New York University Langone Medical Center, New York, New York
| | - D Abu-Amara
- Psychiatry (J.N., M.Q., D.A.-A., C.M.), Steven and Alexandra Cohen Veterans Center for Posttraumatic Stress and Traumatic Brain Injury, New York University Langone Medical Center, New York, New York
| | - C Marmar
- From the Departments of Radiology (E.L., C.M., Y.W.L.)
| | - Y W Lui
- From the Departments of Radiology (E.L., C.M., Y.W.L.)
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22
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Ye X, Qian M, Lu L. Clinical characteristics, psychological effects, quality of life, and coping strategies in Chinese patients with Mayer-Rokitansky-Kuster-Hauser syndrome. CLIN EXP OBSTET GYN 2018. [DOI: 10.12891/ceog3717.2018] [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: 11/01/2022]
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23
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Hu X, Hsueh PYS, Chen CH, Diaz KM, Parsons FE, Ensari I, Qian M, Cheung YKK. An interpretable health behavioral intervention policy for mobile device users. IBM J Res Dev 2018; 62:4. [PMID: 29875505 PMCID: PMC5985829 DOI: 10.1147/jrd.2017.2769320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
An increasing number of people use mobile devices to monitor their behavior, such as exercise, and record their health status, such as psychological stress. However, these devices rarely provide ongoing support to help users understand how their behavior contributes to changes in their health status. To address this challenge, we aim to develop an interpretable policy for physical activity recommendations that reduce a user's perceived psychological stress, over a given time horizon. We formulate this problem as a sequential decision-making problem and solve it using a new method that we refer to as threshold Q-learning (TQL). The advantage of the TQL method over traditional Q-learning is that it is "doubly robust" and interpretable. This interpretability is achieved by making model assumptions and incorporating threshold selection into the learning process. Our simulation results indicate that the TQL method performs better than the Q-learning method given model misspecification. Our analyses are performed on data collected from 79 healthy adults over a 7 week period, where the data comprise physical activity patterns collected from mobile devices and self-assessed stress levels of the users. This work serves as a first step toward a computational health coaching solution for mobile device users.
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24
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Gui N, Xu W, Myers DE, Shukla R, Tang HP, Qian M. The effect of ordered and partially ordered surface topography on bone cell responses: a review. Biomater Sci 2018; 6:250-264. [DOI: 10.1039/c7bm01016h] [Citation(s) in RCA: 65] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Current understanding of the role of ordered and partially ordered surface topography in bone cell responses for bone implant design.
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Affiliation(s)
- N. Gui
- Centre for Additive Manufacturing
- School of Engineering
- RMIT University
- Melbourne
- Australia
| | - W. Xu
- Department of Engineering
- Macquarie University
- Sydney
- Australia
| | - D. E. Myers
- Australian Institute for Musculoskeletal Science
- Victoria University and University of Melbourne
- Australia
- College of Health and Biomedicine
- Victoria University
| | - R. Shukla
- Nanobiotechnology Research Laboratory and Centre for Advanced Materials & Industrial Chemistry
- School of Science
- RMIT University
- Melbourne
- Australia
| | - H. P. Tang
- State Key Laboratory of Porous Metal Materials
- Northwest Institute for Nonferrous Metal Research
- and Xi'an Sailong Metal Materials Co. Ltd
- Xi'an 710016
- China
| | - M. Qian
- Centre for Additive Manufacturing
- School of Engineering
- RMIT University
- Melbourne
- Australia
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25
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Dehghan-Manshadi A, Bermingham MJ, Dargusch M, StJohn D, Qian M. Metal injection moulding of titanium and titanium alloys: Challenges and recent development. POWDER TECHNOL 2017. [DOI: 10.1016/j.powtec.2017.06.053] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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26
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Wang G, Wang Q, Easton MA, Dargusch MS, Qian M, Eskin DG, StJohn DH. Role of ultrasonic treatment, inoculation and solute in the grain refinement of commercial purity aluminium. Sci Rep 2017; 7:9729. [PMID: 28852149 PMCID: PMC5575269 DOI: 10.1038/s41598-017-10354-6] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2017] [Accepted: 08/01/2017] [Indexed: 11/17/2022] Open
Abstract
The present study investigates the influence of ultrasonic treatment on the grain refinement of commercial purity aluminium with a range of Al3Ti1B master alloy additions. When the aluminium contains the smallest amount of added master alloy, ultrasonics caused significant additional grain refinement compared to that provided by the master alloy alone. However, the influence of ultrasonics on grain size reduces with increasing addition of the master alloy which adds additional TiB2 particles and Ti solute with each incremental addition. Applying the Interdependence model to analyse the experimentally measured grain sizes revealed that the results of this study and those from similar experiments on an Al-2Cu alloy were consistent when the alloy compositions are converted to their growth restriction factors (Q) and that increasing Q had a major effect on reducing grain size and increasing grain number density. Compared with the application of ultrasonic treatment where an order of magnitude increase in the grain number density is achieved, an increase in the Ti content over the range of master alloy additions, causes the grain number density to increase by approximately three times.
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Affiliation(s)
- G Wang
- Centre of Advanced Materials Processing and Manufacturing (AMPAM), The University of Queensland, St Lucia, QLD, 4072, Australia. .,Defence Materials Technology Centre (DMTC), The University of Queensland, St Lucia, QLD 4072, Australia.
| | - Q Wang
- Centre of Advanced Materials Processing and Manufacturing (AMPAM), The University of Queensland, St Lucia, QLD, 4072, Australia
| | - M A Easton
- Centre for Additive Manufacturing, School of Engineering, RMIT University, Melbourne, VIC 3000, Australia
| | - M S Dargusch
- Centre of Advanced Materials Processing and Manufacturing (AMPAM), The University of Queensland, St Lucia, QLD, 4072, Australia.,Defence Materials Technology Centre (DMTC), The University of Queensland, St Lucia, QLD 4072, Australia
| | - M Qian
- Centre for Additive Manufacturing, School of Engineering, RMIT University, Melbourne, VIC 3000, Australia
| | - D G Eskin
- BCAST, Brunel University, London, Uxbridge, UB8 3PH, United Kingdom.,Tomsk State University, 634050, Tomsk, Russian Federation
| | - D H StJohn
- Centre of Advanced Materials Processing and Manufacturing (AMPAM), The University of Queensland, St Lucia, QLD, 4072, Australia.,Defence Materials Technology Centre (DMTC), The University of Queensland, St Lucia, QLD 4072, Australia
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Cheng L, Wang S, Che YH, Qian M. Study of three types of desensitizers in dentin bonding strength. J BIOL REG HOMEOS AG 2017; 31:557-565. [PMID: 28952286] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
One hundred and twenty human molars without decay (premolars and complete third molars) freshly extracted for orthodontic purposes were used in the study to explore the impact of application of three kinds of desensitizers on self-etching/all-etching bond strength of dentin. The roots were ground along the cementoenamel junction (CEJ), the residual crowns were divided into two parts along mesial and distal direction, and the enamel layer was removed. The dentin was ground into standard pieces of 3x3x3 mm and then polished using alumina waterproof abrasive paper. Two hundred and forty specimens were divided into two groups according to self-etching bond (OptiBond, iBond, XenoIV) and all-etching bond (OptiBond, iBond, Probond). Each of the two groups were subdivided into three groups with different brands, and then further subdivided into three experimental groups and a control group (10 samples in each final group). The surface of dentin coated with desensitizer was examined using scanning electron microscope. Results showed that only the shear strength of iBond + Ddes + Z100 resin group was lower compared to the control group (P < 0.05). The comparison of the resin shear strength in other experimental groups with the control groups demonstrated no statistically significant difference (P > 0.05). The shear strength of Optibond + Gluma, Optibond + Ddes, iBond + Ddes + Z100 resin group in all-etching bond group and the experimental groups in Probond group was lower than in the control group (P < 0.05). The resin shear strength in other groups did not differ from the controls (P > 0.05).
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Affiliation(s)
- L Cheng
- Department of Prosthodontics, School of Stomatology Hospital of Jilin University, Changchun, Jilin, China
| | - S Wang
- Department of Oral Geriatrics, School of Stomatology Hospital of Jilin University, Changchun, Jilin, China
| | - Y H Che
- Department of Science and Education, School of Stomatology Hospital of Jilin University, Changchun, Jilin, China
| | - M Qian
- Department of Prosthodontics, School of Stomatology Hospital of Jilin University, Changchun, Jilin, China
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Chen C, Chen Y, Lu Z, Qian M, Xie H, Tay FR. The effects of water on degradation of the zirconia-resin bond. J Dent 2017; 64:23-29. [PMID: 28414171 DOI: 10.1016/j.jdent.2017.04.004] [Citation(s) in RCA: 20] [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] [Subscribe] [Scholar Register] [Received: 03/28/2017] [Revised: 04/07/2017] [Accepted: 04/09/2017] [Indexed: 10/19/2022] Open
Abstract
OBJECTIVES 10-methacryloyloxydecyldihydrogenphosphate (MDP) containing primers improve bonding of yttria-stabilised tetragonal zirconia (Y-TZP) to methacrylate resins. The present study investigated the role played by water in the deterioration of MDP-mediated zirconia-resin bonds. METHODS Grit-blasted Y-TZP plates were conditioned with two MDP primers and bonded with resin for shear bond strength (SBS) testing. Additional bonded plates were aged hydrothermally and compared with unaged Y-TZP after 24h of water-storage or 6 months of water/acid/alkali-storage. The monoclinic phase (m-ZrO2) in different groups was determined by X-ray diffraction. Hydrolytic stability of the coordinate bond between MDP and zirconia in neutral/acid/alkaline environment was analysed using thermodynamic calculations. Microleakage and release of the element phosphorus from MDP-mediated Y-TZP/resin-bonded interfaces were evaluated via methylene blue dye infiltration and inductively coupled plasma-mass spectrometry (ICP-MS). RESULTS Hydrothermal ageing did not significantly alter SBS. Ageing in acidic or neutral medium led to significant decline in SBS. The m-ZrO2 phase increased after hydrothermal ageing but no m-ZrO2 was detected in the water/acid/alkali-aged specimens. A higher equilibrium constant was identified in the MDP-t-ZrO2 complex when compared with the MDP-m-ZrO2 complex. MDP-conditioning failed to prevent infiltration of the methylene blue dye. Phosphorus was detected by ICP-MS from the solutions used for soaking the resin-bonded specimens. CONCLUSIONS Hydrolysis of the coordinate bond between MDP and ZrO2, rather than t→m phase transformation, weakens the bond integrity between MDP-conditioned Y-TZP and methacrylate resin. CLINICAL SIGNIFICANCE Hydrolysis of the coordinate bond between MDP and zirconia is responsible for deterioration of the integrity of the bond between MDP-conditioned Y-TZP and methacrylate resin.
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Affiliation(s)
- C Chen
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing, China
| | - Y Chen
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing, China
| | - Z Lu
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing, China
| | - M Qian
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing, China
| | - H Xie
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing, China.
| | - F R Tay
- Department of Endodontics, The Dental College of Georgia, Augusta University, Augusta, GA, 30912, USA.
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Cheng L, He X, Che Y, Che H, Qian M. Osteogenesis-promoting activity of composites SBA-15 mesoporous particles carrying oxytocin in vitro and in vivo. J BIOL REG HOMEOS AG 2017; 31:157-162. [PMID: 28337886] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
This study analyzes the performance of SBA-15 mesoporous particles carrying oxytocin (OT) in promoting osteogenesis in vitro and in vivo. The SBA-15 particles synthesized in the previous studies (about 30 μm in diameter and containing 10 nm deep pores) were loaded with the drug oxytocin and cultured with human osteosarcoma MG-63 cell line in vitro. The influence of particles on cell proliferation was studied. The level of the osteogenic marker (alkaline phosphatase and type I collagen) was measured. For in vivo studies, the connectivity defects of rabbit skull were prepared, and SBA-15 suspensions were regularly injected at the defect sites. The changes in the defect site calcium salt deposition were measured, and morphological changes were observed by microscopy. The material had to promote effect on osteogenesis-related indicators such as alkaline phosphatase and collagen I in bone sarcoma cell line MG-63. In vivo, the calcium salt deposition in OT/SBA-15 group was significantly higher than in the blank group. SBA-15 carriers appeared to persist in the region of the defect after the injection and release the drugs slowly, thus playing a more distinct role in promoting bone repair of local bone defects. The results showed that SBA-15 particles with OT could slow the release drugs and could help in promoting osteogenesis.
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Affiliation(s)
- L Cheng
- Department of Prosthodontics, School of Stomatology, Jilin University, Changchun, China
| | - X He
- Department of Prosthodontics, School of Stomatology, Jilin University, Changchun, China
| | - Y Che
- Department of Science and Education, School of Stomatology, Jilin University, Changchun, China
| | - H Che
- Department of Periodontics, School of Stomatology, Jilin University, Changchun, China
| | - M Qian
- Department of Prosthodontics, School of Stomatology, Jilin University, Changchun, China
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Qian M, Wei L, Hao L, Tang S. Pharmacokinetics of new high-concentration and long-acting praziquantel oily suspensions after intramuscular administration in cattle. J Vet Pharmacol Ther 2016; 40:454-458. [DOI: 10.1111/jvp.12378] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2016] [Accepted: 09/28/2016] [Indexed: 01/13/2023]
Affiliation(s)
- M. Qian
- College of Veterinary Medicine; China Agricultural University; Beijing China
| | - L. Wei
- College of Veterinary Medicine; China Agricultural University; Beijing China
- Beijing Animal Health Inspection; Beijing China
| | - L. Hao
- China Institute of Veterinary Drug Control; Beijing China
| | - S. Tang
- College of Veterinary Medicine; China Agricultural University; Beijing China
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Yifan D, Qun L, Yingshuang H, Xulin L, Jianjun W, Qian M, Yuman Y, Zhaoyang R. Bronchial lavage P 16INK4A gene promoter methylation and lung cancer diagnosis: A meta-analysis. Indian J Cancer 2016; 52 Suppl 2:e96-8. [PMID: 26728683 DOI: 10.4103/0019-509x.172522] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
OBJECTIVE To evaluate the diagnostic value of bronchial lavage P16INK4A promoter methylation and lung cancer. MATERIALS AND METHODS The databases of PubMed, Medline, China National Knowledge Infrastructure, and Wanfang were electronically searched by two reviewers to find the suitable studies related to the association between P16INK4A promoter methylation and lung cancer. The P16INK4A promoter methylation rate was extracted from each included individual study. The diagnostic sensitivity, specificity, and area under the receiver operating characteristic ROC curve of bronchial lavage P16INK4Aas a biomarker for diagnosis of lung cancer were pooled by stata 11.0 software (Stata Corporation, College Station, TX, USA). RESULTS At last, 10 publications were included in this meta-analysis. Of the included 10 studies, five are published in English with relatively high quality and other five papers published in Chinese have relatively low quality. The pooled sensitivity and specificity of bronchial lavage P16INK4A promoter methylation for lung cancer diagnosis were 0.61 (95% confidence interval [CI]: 0.57-0.65) and 0.81 (95% CI: 0.78-0.85), respectively, with random effect model. The ROC curve were calculated and drawn according to Bayes' theorem by stata 11.0 software. The systematic area under the ROC was 0.72 (95% CI: 0.68-0.76), which indicated that the diagnostic value of bronchial lavage P16INK4A promoter methylation for lung cancer was relatively high. Moreover, no significant publication bias was existed in this meta-analysis (t = 0.69, P > 0.05). CONCLUSION Bronchial lavage P16INK4A promoter methylation can be a potential biomarker for diagnosis of lung cancer.
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Affiliation(s)
| | | | | | | | | | | | | | - R Zhaoyang
- Department of Respiratory, The Affiliated Hospital of Hangzhou Normal University, 310015, China
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Usherenko I, Basu Roy U, Mazlish S, Liu S, Benkoscki L, Coutts D, Epstein S, Qian M, Rafiq S, Scott C. Pediatric tuberculosis drug market: an insider perspective on challenges and solutions. Int J Tuberc Lung Dis 2016; 19 Suppl 1:23-31. [PMID: 26564537 DOI: 10.5588/ijtld.15.0479] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Representative stakeholders were consulted on how they felt access to pediatric tuberculosis (TB) drugs could be improved. A key recommendation is the development of new child-friendly, adequately dosed formulations with a good shelf life in all climate zones. There is also an urgent need to improve the diagnosis and reporting of children with TB. Manufacturers of pediatric TB medications are to be incentivized through improved coordination among all stakeholders, with streamlined regulatory approvals and increased consumer education on drug and regimen guidelines. Finally, pooled procurement is advised to ensure sustained market supply against affordable prices.
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Affiliation(s)
- I Usherenko
- The Global Alliance for TB Drug Development, New York, New York
| | - U Basu Roy
- The Solutions Lab, New York University, New York, New York, USA
| | - S Mazlish
- The Solutions Lab, New York University, New York, New York, USA
| | - S Liu
- The Solutions Lab, New York University, New York, New York, USA
| | - L Benkoscki
- The Solutions Lab, New York University, New York, New York, USA
| | - D Coutts
- The Solutions Lab, New York University, New York, New York, USA
| | - S Epstein
- The Solutions Lab, New York University, New York, New York, USA
| | - M Qian
- The Solutions Lab, New York University, New York, New York, USA
| | - S Rafiq
- The Solutions Lab, New York University, New York, New York, USA
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Wang X, Xu S, Zhou S, Xu W, Leary M, Choong P, Qian M, Brandt M, Xie YM. Topological design and additive manufacturing of porous metals for bone scaffolds and orthopaedic implants: A review. Biomaterials 2016; 83:127-41. [PMID: 26773669 DOI: 10.1016/j.biomaterials.2016.01.012] [Citation(s) in RCA: 625] [Impact Index Per Article: 78.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2015] [Revised: 12/31/2015] [Accepted: 01/01/2016] [Indexed: 02/06/2023]
Abstract
One of the critical issues in orthopaedic regenerative medicine is the design of bone scaffolds and implants that replicate the biomechanical properties of the host bones. Porous metals have found themselves to be suitable candidates for repairing or replacing the damaged bones since their stiffness and porosity can be adjusted on demands. Another advantage of porous metals lies in their open space for the in-growth of bone tissue, hence accelerating the osseointegration process. The fabrication of porous metals has been extensively explored over decades, however only limited controls over the internal architecture can be achieved by the conventional processes. Recent advances in additive manufacturing have provided unprecedented opportunities for producing complex structures to meet the increasing demands for implants with customized mechanical performance. At the same time, topology optimization techniques have been developed to enable the internal architecture of porous metals to be designed to achieve specified mechanical properties at will. Thus implants designed via the topology optimization approach and produced by additive manufacturing are of great interest. This paper reviews the state-of-the-art of topological design and manufacturing processes of various types of porous metals, in particular for titanium alloys, biodegradable metals and shape memory alloys. This review also identifies the limitations of current techniques and addresses the directions for future investigations.
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Affiliation(s)
- Xiaojian Wang
- Centre for Innovative Structures and Materials, School of Engineering, RMIT University, GPO Box 2476, Melbourne 3001, Victoria, Australia
| | - Shanqing Xu
- Centre for Innovative Structures and Materials, School of Engineering, RMIT University, GPO Box 2476, Melbourne 3001, Victoria, Australia
| | - Shiwei Zhou
- Centre for Innovative Structures and Materials, School of Engineering, RMIT University, GPO Box 2476, Melbourne 3001, Victoria, Australia
| | - Wei Xu
- Centre for Additive Manufacturing, School of Engineering, RMIT University, GPO Box 2476, Melbourne 3001, Victoria, Australia
| | - Martin Leary
- Centre for Additive Manufacturing, School of Engineering, RMIT University, GPO Box 2476, Melbourne 3001, Victoria, Australia
| | - Peter Choong
- Department of Surgery, University of Melbourne, St. Vincent's Hospital, Melbourne 3001, Victoria, Australia
| | - M Qian
- Centre for Additive Manufacturing, School of Engineering, RMIT University, GPO Box 2476, Melbourne 3001, Victoria, Australia
| | - Milan Brandt
- Centre for Additive Manufacturing, School of Engineering, RMIT University, GPO Box 2476, Melbourne 3001, Victoria, Australia
| | - Yi Min Xie
- Centre for Innovative Structures and Materials, School of Engineering, RMIT University, GPO Box 2476, Melbourne 3001, Victoria, Australia; Centre for Additive Manufacturing, School of Engineering, RMIT University, GPO Box 2476, Melbourne 3001, Victoria, Australia.
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Da J, Zhuo M, Qian M. MCPIP is induced by cholesterol and participated in cholesterol-caused DNA damage in HUVEC. Int J Clin Exp Pathol 2015; 8:10625-10634. [PMID: 26617772 PMCID: PMC4637587] [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] [MESH Headings] [Subscribe] [Scholar Register] [Received: 06/29/2015] [Accepted: 07/29/2015] [Indexed: 06/05/2023]
Abstract
Hypercholesterolemia is an important risk factor for atherosclerosis and cholesterol treatment would cause multiple damages, including DNA damage, on endothelial cells. In this work, we have used human umbilical vein endothelial cell line (HUVEC) to explore the mechanism of cholesterol induced damage. We have found that cholesterol treatment on HUVEC could induce the expression of MCPIP1. When given 12.5 mg/L cholesterol on HUVEC, the expression of MCPIP1 starts to increase since 4 hr after treatment and at 24 hr after treatment it could reach to 10 fold of base line level. We hypothesis this induction of MCPIP1 may contribute to the damaging process and we have used siRNA of MCPIP1 in further research. This MCPIP1 siRNA (siMCPIP) could down regulate MCPIP1 by 73.4% and when using this siRNA on HUVECs, we could see the cholesterol induced DNA damage have been reduced. We have detected DNA damage by γH2AX foci formation in nuclear, γH2AX protein level and COMET assay. Compare to cholesterol alone group, siMCPIP group shows much less γH2AX foci formation in nuclear after cholesterol treatment, less γH2AX protein level in cell and also less tail moment detected in COMET assay. We have also seen that using siMCPIP1 could result in less reactive oxygen species (ROS) in cell after cholesterol treatment. We have also seen that using siMCPIP could reduce the protein level of Nox4 and p47(phox), two major regulators in ROS production. These results suggest that MCPIP1 may play an important role in cholesterol induced damage.
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Affiliation(s)
- Jingjing Da
- Department of Biochemistry and Molecular Biology, Zunyi Medical CollegeZunyi, Guizhou, China
- Department of Medicine, Renal Division, Guizhou Provincial People’s Hospital, Guizhou Provincial Institute of Nephritic & Urinary diseaseGuiyang, Guizhou, China
| | - Ming Zhuo
- Department of Biochemistry and Molecular Biology, Zunyi Medical CollegeZunyi, Guizhou, China
| | - Minzhang Qian
- Department of Biochemistry and Molecular Biology, Zunyi Medical CollegeZunyi, Guizhou, China
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Qian M, Chen T, Zhou D, Zhang Z, Zhang Q, Tang S, Xiao X. Development of a new benazepril hydrochloride chewable tablet and evaluation of its bioequivalence for treatment of heart failure in dogs. J Vet Pharmacol Ther 2015; 39:98-101. [PMID: 26228576 DOI: 10.1111/jvp.12252] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2015] [Accepted: 06/25/2015] [Indexed: 11/27/2022]
Abstract
The aim of the study was to develop a new chewable benazepril hydrochloride(BH) tablet, investigate its physical properties, and evaluate its bioequivalence with the branded formulation (Fortekor). A corrective agent was included in the formula to improve its palatability and convenience for administration to dogs. The tablet remained stable in light, heat, and humidity tests, and its physical properties such as hardness, uniformity of content, and dissolution rate were highly consistent with the technical standards. After single and repeated administrations to eight beagles and single dose to 14 mongrel dogs (0.5 mg/kg p.o.), plasma BH and its active metabolite, benazeprilat (BZ), were detected. There was no significant difference in the major pharmacokinetic parameters (Cmax , Tmax, and AUC₀₋₂₄) between the two formulations. The 90% confidence intervals calculated for the ratios of area under the time-concentration curve (AUC₀₋₂₄) were 92.4-116.3% for BH and 89.9-102.3% for BZ, within the accepted range for bioequivalence of 80-125%. The results showed our new chewable tablet is bioequivalent to the commercial product and suitable for addition to the benazepril product family for the treatment of heart failure in dogs.
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Affiliation(s)
- M Qian
- National Center for Veterinary Drug Safety Evaluation, College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - T Chen
- National Center for Veterinary Drug Safety Evaluation, College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - D Zhou
- National Center for Veterinary Drug Safety Evaluation, College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Z Zhang
- National Center for Veterinary Drug Safety Evaluation, College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Q Zhang
- National Center for Veterinary Drug Safety Evaluation, College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - S Tang
- National Center for Veterinary Drug Safety Evaluation, College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - X Xiao
- National Center for Veterinary Drug Safety Evaluation, College of Veterinary Medicine, China Agricultural University, Beijing, China
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Xu F, Qian M, Wei Y, Wang Y, Wang J, Li M, Zhang Y, Zhao Y, Guo X. Postural change from lateral to supine is an important mechanism enhancing cephalic spread after injection of intrathecal 0.5% plain bupivacaine for cesarean section. Int J Obstet Anesth 2015; 24:308-12. [PMID: 26357934 DOI: 10.1016/j.ijoa.2015.06.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [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: 03/13/2015] [Revised: 06/14/2015] [Accepted: 06/29/2015] [Indexed: 10/23/2022]
Abstract
BACKGROUND Spinal anesthesia is widely used for cesarean section, but the factors that affect the spread of the block in pregnant patients are still not fully explained. This study was designed to investigate the effect of postural changes on sensory block level. METHODS Thirty patients scheduled for elective cesarean section under combined spinal-epidural anesthesia were randomly allocated into three groups. After intrathecal injection of 0.5% plain bupivacaine 7.5mg, patients in group S were immediately placed in the supine position with left tilt, patients in group L5 were kept lateral for 5 min and then turned to the supine position with left tilt, and patients in group L10 were kept lateral for 10 min and then turned to the supine position with left tilt. RESULTS At 5 min, median cephalad level of sensory block was lower in groups L5 and L10 compared with group S (corrected P<0.001); at 10 min, median cephalad sensory block level was lower in group L10 compared with group S (corrected P<0.001) and group L5 (corrected P<0.001), and lower in group L5 compared with group S (corrected P=0.033); at 15 min, median cephalad level of sensory block was lower in group L10 compared with group S (corrected P=0.003) and group L5 (corrected P=0.015). CONCLUSIONS In our population, using 0.5% plain bupivacaine 7.5mg, postural change from the lateral position to the supine position is an important mechanism enhancing cephalic spread of spinal anesthesia during late pregnancy.
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Affiliation(s)
- F Xu
- Department of Anesthesiology, Peking University Third Hospital, Beijing, China
| | - M Qian
- Department of Anesthesiology, Peking University Third Hospital, Beijing, China
| | - Y Wei
- Department of Obstetrics and Gynecology, Peking University Third Hospital, Beijing, China
| | - Y Wang
- Department of Obstetrics and Gynecology, Peking University Third Hospital, Beijing, China
| | - J Wang
- Department of Anesthesiology, Peking University Third Hospital, Beijing, China
| | - M Li
- Department of Anesthesiology, Peking University Third Hospital, Beijing, China
| | - Y Zhang
- Department of Obstetrics and Gynecology, Peking University Third Hospital, Beijing, China
| | - Y Zhao
- Department of Obstetrics and Gynecology, Peking University Third Hospital, Beijing, China
| | - X Guo
- Department of Anesthesiology, Peking University Third Hospital, Beijing, China.
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Song T, Yan M, Shi Z, Atrens A, Qian M. Creation of bimodal porous copper materials by an annealing-electrochemical dealloying approach. Electrochim Acta 2015. [DOI: 10.1016/j.electacta.2015.02.217] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [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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Song T, Yan M, Gao Y, Atrens A, Qian M. Concurrence of de-alloying and re-alloying in a ternary Al67Cu18Sn15 alloy and the fabrication of 3D nanoporous Cu–Sn composite structures. RSC Adv 2015. [DOI: 10.1039/c4ra15622f] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
The creation of nanoporous Cu3Sn–Cu–Cu6Sn5 composite structures in the form of self-supporting foils through the concurrence of de-alloying and re-alloying.
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Affiliation(s)
- T. Song
- RMIT University
- School of Aerospace
- Mechanical and Manufacturing Engineering
- Centre for Additive Manufacturing
- Melbourne
| | - M. Yan
- RMIT University
- School of Aerospace
- Mechanical and Manufacturing Engineering
- Centre for Additive Manufacturing
- Melbourne
| | - Y. Gao
- Shanghai Key Laboratory of Modern Metallurgy and Materials Processing
- Shanghai University
- 200072 Shanghai
- P.R. China
| | - A. Atrens
- The University of Queensland
- Division of Materials
- School of Mechanical and Mining Engineering
- Brisbane
- Australia
| | - M. Qian
- RMIT University
- School of Aerospace
- Mechanical and Manufacturing Engineering
- Centre for Additive Manufacturing
- Melbourne
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Shu B, Yang Y, Qian M. [The phenotypic switching of vascular smooth muscle cells induced by cholesterol]. Xi Bao Yu Fen Zi Mian Yi Xue Za Zhi 2014; 30:725-731. [PMID: 25001938] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
OBJECTIVE To observe the effect of cholesterol on phenotypic switching of human vascular smooth muscle cells (VSMCs) in vitro. METHODS VSMCs were treated with cholesterol at 12.5, 25.0 and 50.0 mg/L for 48 hours and at 50 mg/L for 24, 48 and 72 hours. Real-time quantitative PCR and Western blotting were respectively applied to detect the mRNA expressions of smooth muscle alpha-actin (α-SMA), smooth muscle 22 alpha (SM22α) and the protein expressions of SM22α, monocyte chemotactic protein-1 induced protein (MCPIP). CCK-8 assay was performed to analyze the viability of VSMCs. RESULTS Compared with control groups, cholesterol treatments resulted in a significant down-regulation of both mRNA and protein expressions of endogenous α-SMA and SM22α in VSMCs at 48 hours (P<0.05), and the expressions were lowest when cholesterol was 50.0 mg/L. At 48 and 72 hours, 50.0 mg/L cholesterol significantly decreased the expressions of α-SMA and SM22α (P<0.05). The proliferation of VSMCs in cholesterol groups was promoted significantly compared with control groups (P<0.05). Cholesterol at 50.0 mg/L was also able to induce MCPIP protein expression in VSMCs at 48 hours (P<0.05). CONCLUSION Cholesterol can decrease the expressions of α-SMA and SM22α and enhance the proliferation of VSMCs, which suggests that cholesterol induces phenotypic switching of VSMCs.
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Affiliation(s)
- Bo Shu
- Shanghai University of Traditional Chinese Medicine, Shanghai 200032; Department of Biochemistry, Zunyi Medical College, Zunyi 563003, China
| | - Yijun Yang
- Department of Biochemistry, Zunyi Medical College, Zunyi 563003, China
| | - Minzhang Qian
- Department of Biochemistry, Zunyi Medical College, Zunyi 563003, China
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Yan M, Qian M, Kong C, Dargusch M. Impacts of trace carbon on the microstructure of as-sintered biomedical Ti-15Mo alloy and reassessment of the maximum carbon limit. Acta Biomater 2014; 10:1014-23. [PMID: 24200712 DOI: 10.1016/j.actbio.2013.10.034] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2013] [Revised: 09/29/2013] [Accepted: 10/28/2013] [Indexed: 10/26/2022]
Abstract
The formation of grain boundary (GB) brittle carbides with a complex three-dimensional (3-D) morphology can be detrimental to both the fatigue properties and corrosion resistance of a biomedical titanium alloy. A detailed microscopic study has been performed on an as-sintered biomedical Ti-15Mo (in wt.%) alloy containing 0.032 wt.% C. A noticeable presence of a carbon-enriched phase has been observed along the GB, although the carbon content is well below the maximum carbon limit of 0.1 wt.% specified by ASTM Standard F2066. Transmission electron microscopy (TEM) identified that the carbon-enriched phase is face-centred cubic Ti2C. 3-D tomography reconstruction revealed that the Ti2C structure has morphology similar to primary α-Ti. Nanoindentation confirmed the high hardness and high Young's modulus of the GB Ti2C phase. To avoid GB carbide formation in Ti-15Mo, the carbon content should be limited to 0.006 wt.% by Thermo-Calc predictions. Similar analyses and characterization of the carbide formation in biomedical unalloyed Ti, Ti-6Al-4V and Ti-16Nb have also been performed.
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Luo SD, Yang YF, Schaffer GB, Qian M. Calibration of temperature measurement by infrared pyrometry in microwave heating of powder materials: an exothermic reaction based approach. J Microw Power Electromagn Energy 2013; 47:5-11. [PMID: 24779131 DOI: 10.1080/08327823.2013.11689842] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Accurate temperature measurement remains a challenge for microwave heating of powder materials. We propose a temperature calibration method based on exothermic reactions and the resultant thermal runaway that occurs during microwave heating. The approach was demonstrated on microwave heating of four titanium alloys. Differential scanning calorimetry was used to determine the threshold reaction temperature for each selected titanium alloy. This served as a standard for the microwave heating of these titanium alloys. Infrared pyrometric temperature measurements were then calibrated by comparing the starting temperature of each thermal runaway event with the threshold reaction temperature.
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Zhang X, Liu X, Shang H, Xu Y, Qian M. Monocyte chemoattractant protein-1 induces endothelial cell apoptosis in vitro through a p53-dependent mitochondrial pathway. Acta Biochim Biophys Sin (Shanghai) 2011; 43:787-95. [PMID: 21859809 DOI: 10.1093/abbs/gmr072] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [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: 11/14/2022] Open
Abstract
The cystine-cystine (CC) chemokine monocyte chemoattractant protein-1 (MCP-1) has been established playing a pathogenic role in the development of atherosclerosis due to its chemotactic ability of leading monocytes to locate to subendothelia. Recent studies have revealed more MCP-1 functions other than chemotaxis. Here we reported that various concentrations (0.1-100 ng/ml) of MCP-1 induced human umbilical vein endothelial cell (HUVEC) strain CRL-1730 apoptosis, caspase-9 activation, and a couple of mitochondrial alterations. Moreover, MCP-1 upregulated p53 expression of HUVECs and the p53-specific inhibitor pifithrin-α (PFTα) rescued the MCP-1-induced apoptosis of HUVECs. Furthermore, PKC (protein kinase C) activation or inhibition might also affect HUVECs apoptosis induced by MCP-1. These findings together demonstrate that MCP-1 exerts direct proapoptotic effects on HUVECs in vitro via a p53-dependent mitochondrial pathway.
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Affiliation(s)
- Xuan Zhang
- Department of Biochemistry, Zunyi Medical College, China
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Gao Y, Zhou YS, Qian M, Xie ZQ, Xiong W, Luo HF, Jiang L, Lu YF. Fast growth of branched nickel monosilicide nanowires by laser-assisted chemical vapor deposition. Nanotechnology 2011; 22:235602. [PMID: 21474870 DOI: 10.1088/0957-4484/22/23/235602] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Branched nickel monosilicide (NiSi) nanowires (NWs), for the first time, have been synthesized on Ni foams by laser-assisted chemical vapor deposition using disilane precursor molecules. Studies indicate that 600 °C is the threshold temperature for the growth of a large number of branched NiSi NWs with 100-500 nm long branches extending from the main stems. Below the threshold temperature, unbranched NiSi NWs were obtained. The density of the branched NiSi NWs is relatively higher in comparison to that of the unbranched ones. The growth rate of the branched NiSi NWs at 700 °C is estimated up to 10 µm min(-1). High-resolution transmission electron microscopy and energy-dispersive x-ray spectroscopy of the branched NiSi NWs suggest that the formation of these branched nanostructures is ascribed to the Ni-dominant diffusion process. These NiSi NWs with branched nanostructures could bring them new opportunities in nanodevices.
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Affiliation(s)
- Y Gao
- Department of Electrical Engineering, University of Nebraska-Lincoln, Lincoln, NE 68588-0511, USA
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Medicherla RC, Ma MW, Qian M, Vega-Saenz de Miera E, Berman RS, Shapiro RL, Pavlick AC, Bhardwaj N, Shao Y, Osman I, Darvishian F. Impact of immune modulation on sentinel lymph node positivity and outcome in melanoma patients. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.8561] [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: 11/20/2022] Open
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Ma MW, Qian M, Lackaye D, Berman RS, Shapiro RL, Pavlick AC, Golfinos J, Parker E, Hernando E, Shao Y, Osman I. Primary melanoma features associated with increased risk of brain metastasis. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.8560] [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: 11/20/2022] Open
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Abstract
AbstractGadolinium and lanthanum solubility limits in a sodium-alumino-borosilicate glass system were studied. As melting temperature increased from 1400°C to 1450°C, 1500°C and 1550°C, the solubility of gadolinium in the baseline glass 15B2O3-5A12O3-20Na2O-60SiO2 (in molar composition) increased from 10.1 to 11.3, 12.2 and 13.1 (in mole percent of Gd2O3). The enthalpy change of Gd2O3 dissolution in this baseline glass is about 43.6 kJ/mol. Boron effect on lanthanum solubility was studied using the following baseline glasses: xB2O3-20Na2O- 5Al2O3-60SiO2, where x equals to 5, 10, 15, and 20, respectively. It was found that lanthanum solubility limit increased from 8.4 to 10.3, 12.5 and 14.9 (in mole percent of La2O3) as B2O3 increased from 5.1 to 9.5, 13.1 and 16.2 mol%. Gd2O. and La2O3 have similar solubility limits. Solubility limits of mixtures containing different ratios of Gd2O3 to La2O3 in the baseline glass 15B2O3-20Na2O-5A12O3-60SiO2 were found insensitive to the ratio of La/Gd. As far as gadolinium is concerned, its solubility limit will decrease when other lanthanides are introduced.
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Cao Q, Qian M, Wang XF, Wang B, Wu HW, Zhu XJ, Wang YW, Guo J. Negative Feedback Regulation of Raf/MEK/ERK Cascade After Sublethal Cerebral Ischemia in the Rat Hippocampus. Neurochem Res 2010; 36:153-62. [DOI: 10.1007/s11064-010-0285-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/28/2010] [Indexed: 10/19/2022]
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Qian M, Yujie Z, Xiaomin N, Miao Y, Fei G, Zhijian W, Bin N, Zhenxian Y, Hailong G, Dean J, Shiwei Y, Xiaoli L, Hongya H, Bin H. e0519 Rapamycin suppress KrUppel-Like Factor 2 expression: mechanism of endothelial dysfunction associated with drug-eluting stents. Heart 2010. [DOI: 10.1136/hrt.2010.208967.519] [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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Qian M, Yujie Z, Xiaomin N, Miao Y, Fei G, Zhijian W, Bin N, Zhenxian Y, Hailong G, Dean J, Shiwei Y, Xiaoli L, Hongya H, Bin H. e0520 Statin effects in stent thrombosis induced by rapamycin releasing from drug-eluting stents through KrUppel-Like Factor 2 overexpression. Heart 2010. [DOI: 10.1136/hrt.2010.208967.520] [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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