51
|
Chen D, Yang XL, Chen NZ, Wu D, Zhou BT, Shen M, Zhu LM, Li J, Qian JM. [The 468th case: periodic fever, abdominal pain, small intestinal ulcers, NOD2 gene mutation]. ZHONGHUA NEI KE ZA ZHI 2019; 58:237-240. [PMID: 30803188 DOI: 10.3760/cma.j.issn.0578-1426.2019.03.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Fever and abdominal pain are common symptoms and could be main manifestations in patients with autoinflammatory diseases. A 48-year-old female patient was admitted with recurrent fever and abdominal pain for 9 years. Serum level of inflammatory markers synchronously fluctuated with fever, and returned to normal when fever subsided. The periodic episodes of fever occurred every 1 to 4 months and failed to respond to empirical antibiotics. Whole exome sequencing showed heterozygous mutation of NOD2 gene q902k, leading to the final diagnosis of autoinflammatory disease. Corticosteroid and tripterygiumglycosides were effective for the disease remission.
Collapse
|
52
|
Ma SW, Shen M, Xia GB. [Analysis of eight-year follow-up data of plateau workers by color doppler echocardiography]. ZHONGHUA LAO DONG WEI SHENG ZHI YE BING ZA ZHI = ZHONGHUA LAODONG WEISHENG ZHIYEBING ZAZHI = CHINESE JOURNAL OF INDUSTRIAL HYGIENE AND OCCUPATIONAL DISEASES 2019; 36:607-609. [PMID: 30317812 DOI: 10.3760/cma.j.issn.1001-9391.2018.08.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To analyze the heart rate changes and risk factors, as a result of high altitude. Methods: Retrospective analysis of echocardiographic data of plateau workers at a railway maintenance company from 2006 to 2013. The survival curve method was used to analyze the abnormal rate of the heart. Kaplan-Meier method and Cox proportional hazards regression model were used to analyze the influencing factors. Results: In the first occurrence of cardiac abnormalities, the main types of abnormalities were right atrium enlargement (53.47%) , right ventricle enlargement (17.36%) , and tricuspid regurgitation (16.67%) . Cox regression analysis showed that workplace altitude and first physical examination age are two influencing factors of cardiac abnormalities, and their relative risk was 1.661 and 1.039. At high altitudes (3 600~4 000 m) , nearly 40% of workers heart has not changed. But this adaptation does not observed in the ultra-high altitudes (≥4 000 m) . Conclusion: There are individual differences in human adaptability to high altitude. We should take more stringent measures of health care for older people and those who work at more than 4000m. And we should abide by the rotation system for railways that are suitable for the plateau.
Collapse
|
53
|
Diao TX, Han QH, Shan HJ, Wu XQ, Lin YJ, Li Q, Wang GH, Jing YY, Ma X, Shen M, Yu LS, Han L, Wang YX. [Study on the relationship between age-related hearing loss and cognitive impairment]. ZHONGHUA ER BI YAN HOU TOU JING WAI KE ZA ZHI = CHINESE JOURNAL OF OTORHINOLARYNGOLOGY HEAD AND NECK SURGERY 2019; 54:110-115. [PMID: 30776862 DOI: 10.3760/cma.j.issn.1673-0860.2019.02.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the correlation between age-related hearing loss and cognitive impairment. Methods: 201 elderly patients, who were admitted to the Department of Otorhinolaryngology of Peking University People's Hospital from March 1, 2017 to March 31, 2017, were evaluated with hearing screening and the Montreal Cognitive Assessment Scale. Among them, 101 were female and 100 were male, aged 60-90 years old. Taking the cognitive level as the dependent variable, and taking the age, sex, education, occupation, marital status, residence, and average hearing loss (average hearing threshold of 500, 1 000, 2 000, and 4 000 Hz), as well as the length of conscious hearing loss as the independent variables, the single factor analysis and multivariate linear regression analysis were used to screen the main factors affecting the cognitive level of the elderly. Results: Of the 201 elderly patients, 39 had normal hearing, 65 had mild hearing loss, 80 had moderate hearing loss, 16 had severe hearing loss, and 1 had profound hearing loss. The average degree of hearing loss was the influencing factor of cognitive impairment, and it mainly affected the directional force and abstract ability in the cognitive domains (P<0.05); The age, self-reported hearing loss, years of education, marital status, past ear diseases, and hypertension were relatively independent factors that affected the cognitive level(P<0.05). Conclusions: Age-related hearing loss is the risk factor for the cognitive impairment, especially for abstraction and orientation, in the elderly. The self-reported hearing loss is an independent risk factor for cognitive impairment.
Collapse
|
54
|
Wu L, Chen W, Shen M. Incoherently coupled two-color vector dark solitons in self-defocusing media. OPTICS EXPRESS 2018; 26:32194-32204. [PMID: 30650684 DOI: 10.1364/oe.26.032194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Accepted: 11/12/2018] [Indexed: 06/09/2023]
Abstract
We investigate the stability of incoherently coupled two-color vector dark and grey solitons in a nonlinear self-defocusing media. We employ the variational technique to derive approximate solutions of the two-color vector dark solitons. The relations between the soliton parameters and the representation of the transverse velocities of the vector solitons are analytically obtained. We also demonstrate numerically the propagation dynamics of the two-color vector solitons, which shows that the two-color vector dark and grey solitons with different wavelengths are always unstable.
Collapse
|
55
|
Shen M, Tastet L, Capoulade R, Arsenault M, Bédard É, Pibarot P, Clavel M. IMPACT OF THE RENIN-ANGIOTENSIN SYSTEM ACTIVATION ON THE PROGRESSION RATE OF AORTIC STENOSIS. Can J Cardiol 2018. [DOI: 10.1016/j.cjca.2018.07.164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
|
56
|
Bernard J, Tastet L, Capoulade R, Shen M, Bédard R, Guzzetti E, Clisson M, Côté N, Arsenault M, Bédard É, Pibarot P, Clavel M. DETERMINANTS AND IMPACT OF LEFT VENTRICULAR ASYMMETRIC REMODELING ON LEFT VENTRICULAR FUNCTION IN PATIENTS WITH AORTIC STENOSIS - RESULTS FROM THE PROGRESSA STUDY. Can J Cardiol 2018. [DOI: 10.1016/j.cjca.2018.07.191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
|
57
|
Tastet L, Kwiecinski J, Pibarot P, Capoulade R, Everett R, Newby D, Shen M, Guzzetti E, Arsenault M, Bédard É, Larose É, Beaudoin J, Dweck M, Clavel M. SEX-RELATED DIFFERENCES IN THE EXTENT OF MYOCARDIAL FIBROSIS IN PATIENTS WITH AORTIC VALVE STENOSIS. Can J Cardiol 2018. [DOI: 10.1016/j.cjca.2018.07.315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
|
58
|
Shen M, Furniss D, Tang Z, Barny E, Sojka L, Sujecki S, Benson TM, Seddon AB. Modeling of resonantly pumped mid-infrared Pr 3+-doped chalcogenide fiber amplifier with different pumping schemes. OPTICS EXPRESS 2018; 26:23641-23660. [PMID: 30184863 DOI: 10.1364/oe.26.023641] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2018] [Accepted: 05/29/2018] [Indexed: 06/08/2023]
Abstract
We propose a model for resonantly pumped Pr3+-doped chalcogenide fiber amplifiers, which includes excited state absorption and the full spectral amplified spontaneous emission spanning from 2 μm to 6 μm. Based on this model, the observed near- and mid-infrared photoluminescence generated from Pr3+-doped chalcogenide fiber is explained. Then the output properties of a 4.1 μm resonantly pumped Pr3+-doped chalcogenide fiber amplifier are simulated in both co- and counter-pumping schemes. Results show that the 4.1 μm counter-pumped fiber amplifier can achieve a power conversion efficiency (PCE) of over 62.8% for signal wavelengths ranging from 4.5 μm to 5.3 μm. This is, to our best knowledge, the highest simulated PCE for a Pr3+-doped chalcogenide fiber amplifier.
Collapse
|
59
|
Mo MZ, Chen Z, Li RK, Dunning M, Witte BBL, Baldwin JK, Fletcher LB, Kim JB, Ng A, Redmer R, Reid AH, Shekhar P, Shen XZ, Shen M, Sokolowski-Tinten K, Tsui YY, Wang YQ, Zheng Q, Wang XJ, Glenzer SH. Heterogeneous to homogeneous melting transition visualized with ultrafast electron diffraction. Science 2018; 360:1451-1455. [PMID: 29954977 DOI: 10.1126/science.aar2058] [Citation(s) in RCA: 63] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2017] [Accepted: 05/01/2018] [Indexed: 11/02/2022]
Abstract
The ultrafast laser excitation of matters leads to nonequilibrium states with complex solid-liquid phase-transition dynamics. We used electron diffraction at mega-electron volt energies to visualize the ultrafast melting of gold on the atomic scale length. For energy densities approaching the irreversible melting regime, we first observed heterogeneous melting on time scales of 100 to 1000 picoseconds, transitioning to homogeneous melting that occurs catastrophically within 10 to 20 picoseconds at higher energy densities. We showed evidence for the heterogeneous coexistence of solid and liquid. We determined the ion and electron temperature evolution and found superheated conditions. Our results constrain the electron-ion coupling rate, determine the Debye temperature, and reveal the melting sensitivity to nucleation seeds.
Collapse
|
60
|
Osman K, Dumitru I, Douglas F, Demuth K, Shen M, Perryman R. 1107Improved healthcare cost by reducing all unnecessary hospital admissions beyond 30-day readmissions: a new clinical model using interreality care for value-based paradigm. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy565.1107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
61
|
Dumitru I, Osman K, Justillien E, Owusu B, Shen M, Perryman R. P4494Improved both healthcare and hospital costs by interreality care: a new service and financial model of interreality care in high risk patients with frequent readmissions. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy563.p4494] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
|
62
|
Zhai JX, Yan H, Shen M, Shen BH, Liu W. Determination of Oleandrin in Blood and Liver Samples by LC-MS/MS. FA YI XUE ZA ZHI 2018; 34:585-589. [PMID: 30896093 DOI: 10.12116/j.issn.1004-5619.2018.06.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 09/30/2018] [Indexed: 06/09/2023]
Abstract
OBJECTIVES To develop a liquid chromatography-tandem mass spectrometry (LC-MS/MS) analytical method for the determination of oleandrin in blood and liver tissues, which could be applied to the cases of death caused by oleander poisoning. METHODS Blood or liver tissues underwent a liquid-liquid extraction (LLE) using ethyl acetate, and the extract was separated on an Agilent ZORBAX SB-C18 column and eluted with a gradient of acetonitrile and 20 mmol/L ammonium acetate (containing 0.1% formic acid). Oleandrin was detected using electrospray positive ionization (ESI+) with multiple-reaction monitoring (MRM) mode. RESULTS Oleandrin showed excellent linearity in both blood and liver samples in the corresponding linear range (r>0.995 0), with detection limits 1 ng/mL and 2 ng/g, respectively, extraction recovery rates greater than 70.50%, both intra- and inter-day precisions less than 10.71%, accuracies 98.42%-111.63%, and matrix effects 91.52%-106.39%. The method was successfully applied to a case of suspected oleander poisoning. Oleandrin was detected in the blood, urine, liver tissues, bile, stomach wall tissues and stomach contents of the cadaver, with the content ranging from 65.5 to 29 600.0 ng/mL (ng/g). CONCLUSIONS The method developed in this study is simple and convenient to operate with good selectivity, and is suitable for the analysis of oleandrin in biological samples such as blood and liver tissues, which can provide technical support for forensic identification and clinical diagnosis and treatment of oleander poisoning.
Collapse
|
63
|
Xiang P, Shen BH, Yan H, Liu W, Shen M, Wu HJ, Zhuo XY. [Identification of New Designer Benzodiazepine Diclazepam in Drug Facilitated Sexual Assault]. FA YI XUE ZA ZHI 2018; 34:248-252. [PMID: 30051661 DOI: 10.12116/j.issn.1004-5619.2018.03.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 02/23/2018] [Indexed: 06/08/2023]
Abstract
OBJECTIVES To identify the new designer drugs which are totally unknown and not in the routine testing list by the technologies such as high-resolution mass spectrometry in drug facilitated sexual assault, in order to solve the problem in actual cases. METHODS The milky fluid from an actual case was extracted and analyzed using LC-QE, ¹H-NMR and GC-MS, respectively. The accurate masses and cluster ions isotope patterns of unknown compound were obtained by LC-QE. The molecular formula was confirmed as C₁₆H₁₂C₂N₂O based on the protons number of ¹H-NMR. The isomers diclazepam and 4-chlorodiazepam were separated and detected with GC-MS. RESULTS The new designer benzodiazepine as diclazepam in the milky fluid was identified. The results provided direct evidence for the investigation and qualitative analysis of such cases. CONCLUSIONS The combined application of various methods, including LC-QE, ¹H-NMR and GC-MS, can be used to detect unknown new psychoactive substances.
Collapse
|
64
|
Gao L, Xu SS, Yang JQ, Shen M, Li MH. Genome-wide association study reveals novel genes for the ear size in sheep (Ovis aries). Anim Genet 2018; 49:345-348. [PMID: 29774586 DOI: 10.1111/age.12670] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/14/2018] [Indexed: 01/24/2023]
Abstract
Variations in ear size can be observed in livestock such as sheep; however, the genetic basis of variable ear size in sheep is still poorly understood. To investigate causative genes associated with ear size in sheep, a genome-wide association study was performed in 115 adult Duolang sheep with different-sized floppy ears using the Ovine Infinium HD BeadChip. We found 38 significant SNPs at the genome-wide or chromosome-wise 5% significance level after Bonferroni correction. The most significant association (P = 1.61 × 10-6 ) was found at SNP rs402740419, located in the DCC gene, which plays a critical role in ear development. Also, we observed two additional significant SNPs, rs407891215 in PTPRD and rs407769095 in SOX5, both of which are functionally associated with ear developmental processes. Our results are useful for future sheep breeding and provide insights into the genetic basis of ear size development in sheep and other livestock.
Collapse
|
65
|
Hervault M, Shen M, Clisson M, Boulanger M, Mathieu P, Clavel M. Sex-Related Differences in Aortic Stenosis Lesions are Present in Bicuspid and Tricuspid Aortic Valves. Can J Cardiol 2018. [DOI: 10.1016/j.cjca.2018.01.059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
|
66
|
Lin L, Zhang SJ, Xu WC, Luo RX, Ma D, Shen M. [Analysis of Arsenic Compounds in Blood and Urine by HPLC-ICP-MS]. FA YI XUE ZA ZHI 2018; 34:37-43. [PMID: 29577703 DOI: 10.3969/j.issn.1004-5619.2018.01.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 04/25/2017] [Indexed: 11/18/2022]
Abstract
OBJECTIVES To establish an analysis method for the detection of 6 arsenic compounds [AsC, AsB, As(Ⅲ), DMA, MMA and As(V)] in blood and urine by high-performance liquid chromatography-inductively coupled plasma-mass spectrometry (HPLC-ICP-MS), and apply it to real cases. METHODS Triton was used to damage cells, and then EDTA·2Na·2H2O was used to complex arsenic compounds in cells, and sonication and protein deposition by acetonitrile were performed for sample pretreatment. With the mobile phase consisted of ammonium carbonate and ultrapure water, gradient elution was performed for obtaining the arsenic compounds in samples, which were analysed by ICP-MS with Hamilton PRP-X100 column. RESULTS The limits of detection in blood were 1.66-10 ng/mL, while the lower limits of quantitation in blood ranged from 5 to 30 ng/mL. The limits of detection in urine were 0.5-10 ng/mL, while the lower limits of quantitation in urine were 5-30 ng/mL. The relative standard deviation of inter-day and intra-day precisions was less than 10%. This method had been successfully applied to 3 cases. CONCLUSIONS This study has established an analysis method for detecting 6 common arsenic compounds in blood and urine, which can be used to detect the arsenic compounds in the blood and urine from arsenic poisoning cases as well as the patients under arsenic treatment.
Collapse
|
67
|
An N, Li X, Shen M, Chen SL, Huang ZX. [Clinical analysis of multiple myeloma-associated amyloidosis]. ZHONGHUA YI XUE ZA ZHI 2018; 98:365-369. [PMID: 29429248 DOI: 10.3760/cma.j.issn.0376-2491.2018.05.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the clinical features and survival of multiple myeloma-associated amyloidosis patients. Methods: Twenty three multiple myeloma-associated amyloidosis patients were retrospectively analyzed from January 2009 to December 2016. Results: The overall response rate(ORR)was 65.2% and the remission rate (sCR+ CR) was 21.7%. The median progression-free survival(PFS) was fourteen months(1-63), and the median overall survival(OS)was fifteen months(3-63). The early death rate (death rate within one year)was 33.3%. The median OS of patients(n=9)with the performance status(PS) score >2 was seven months(1-15), and the median OS of patients(n=14)with the PS score ≤2 was thirty months(10-63). There was a statistically significant difference in OS(P<0.05); the median PFS and OS of the patients (n=15) who responded to inductive treatment were seventeen months(2-63) and twenty four months (4-63)respectively, and the median PFS and OS of the patients (n=8)who did not respond to inductive treatment were three months(1-8) and eleven months (3-15) respectively. There was a statistically significant difference in PFS and OS(P<0.05). There was a statistically significant difference in PFS and OS between patients treated with remission (n=5)and those who did not(n=18) (P<0.05). Conclusions: The multiple myeloma-associated amyloidosis patients had a high early death rate and short survival time. Early identification and effective treatment are the preconditions for improving the poor prognosis.
Collapse
|
68
|
Huang YY, Chen JY, Shen M, Yang J. [Strategy for minimally invasive cochlear implantation and residual hearing preservation]. ZHONGHUA ER BI YAN HOU TOU JING WAI KE ZA ZHI = CHINESE JOURNAL OF OTORHINOLARYNGOLOGY HEAD AND NECK SURGERY 2018; 53:66-69. [PMID: 29365387 DOI: 10.3760/cma.j.issn.1673-0860.2018.01.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
In the past few decades, considerable development was achieved in the cochlear implantation following the emergence of innovative electrode array and advances in minimally invasive surgery. Minimally invasive technique led to a better preservation of residual low-frequency hearing. The loss of residual hearing was caused by complicated factors. According to previous studies, a slower and stable speed of electrode insertion and the use of perioperative steroids were demonstrated to have a positive impact on hearing preservation. The selection of electrode array or its insertion approaches didn't show any distinctive benefits in hearing preservation.
Collapse
|
69
|
Yuan Y, Shen M, Gao XG. [Presented with subarachnoid hemorrhage and then blood culture negative infective endocarditis: a case report and literature review]. BEIJING DA XUE XUE BAO. YI XUE BAN = JOURNAL OF PEKING UNIVERSITY. HEALTH SCIENCES 2017; 49:1081-1086. [PMID: 29263486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The patient, a 43-year-old man, had paroxysmal headache three months ago, and he had complained the left occipital sharp pain, which could be alleviated by itself, with alalia and the right side of the upper limb numbness. Head computed tomography (CT) revealed a left temporal lobe intraparenchymal hemorrhage with the left side of the subarachnoid hemorrhage in small quantities. Digital subtraction angiography (DSA) revealed a suspicious aneurysm on the left internal carotid artery siphon. He had intermittent fever 1 month ago, with maximum body temperature 39 °C. He suffered headache again 20 days ago, with pain nature, duration and the way of easing up similar to the earlier onset. General examination demonstrated 2/6 grade blowing systolic murmurs at apex area. Neurological examination revealed that Babinski's sign was positive on the right side. Echocardiographic found an anterior mitral valve ve-getation on the 4th day in hospital. So his clinical diagnosis was infective endocarditis with cerebral embolism. He received vancomycin treatment immediately. His three blood cultures remained negative in hospital. His blood specimens were sent to Chinese Center for Disease Control and Prevention, indirect immunofluorescence method (IFA) IgG antibody detection revealed that the Bartonella henselae IgG antibody was positive. Therefore the clinical diagnosis was Bartonella endocarditis complicated with subarachnoid hemorrhage and cerebral embolism. Bartonella, an intracellular fastidious, gram-negative bacilli, was first documented as a cause of endocarditis in 1993 and since then has been increasingly recognized as an important etiology of infective culture-negative endocarditis. In cases of documented Bartonella endocarditis, the Infectious Diseases Society of America (IDSA) guidelines recommended 2 weeks of gentamicin plus 6 weeks of doxycycline treatment, to achieve a higher cure rate.
Collapse
|
70
|
Sun Q, Shen M, Li F, Liu J, Lu L, Zhu M, Yuan D. Immune Regulatory Effects of Enteromorphaclathrata Polysaccharides on Nd Attenuated Vaccine in a Chicken Model Infected with Reticuloendotheliosis Virus. BRAZILIAN JOURNAL OF POULTRY SCIENCE 2017. [DOI: 10.1590/1806-9061-2016-0460] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
71
|
Xiang P, Bu J, Qiao Z, Zhuo XY, Wu HJ, Shen M. [Identification of Methamphetamine Abuse and Selegiline Use: Chiral Analysis of Methamphetamine and Amphetamine in Urine]. FA YI XUE ZA ZHI 2017; 33:599-603. [PMID: 29441766 DOI: 10.3969/j.issn.1004-5619.2017.06.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 08/13/2017] [Indexed: 06/08/2023]
Abstract
OBJECTIVES To study the content variation of selegiline and its metabolites in urine, and based on actual cases, to explore the feasibility for the identification of methamphetamine abuse and selegiline use by chiral analysis. METHODS The urine samples were tested by chiral separation and LC-MS/MS method using CHIROBIOTIC™ V2 chiral liquid chromatography column. The chiral analysis of methamphetamine and amphetamine were performed on the urine samples from volunteers of selegiline use and drug addicts whom suspected taking selegiline. RESULTS After 5 mg oral administration, the positive test time of selegiline in urine was less than 7 h. The mass concentrations of R(-)-methamphetamine and R(-)-amphetamine in urine peaked at 7 h which were 0.86 μg/mL and 0.18 μg/mL and couldn't be detected after 80 h and 168 h, respectively. The sources of methamphetamine and amphetamine in the urine from the drug addicts whom suspected taking selegiline were analysed successfully by present method. CONCLUSIONS The chiral analysis of methamphetamine and amphetamine, and the determination of selegiline's metabolites can be used to distinguish methamphetamine abuse from selegiline use.
Collapse
|
72
|
Tastet L, Capoulade R, Shen M, Clisson M, Arsenault M, Bédard E, Larose E, Pibarot P, Clavel M. RELATIONSHIP BETWEEN PROGRESSION OF AORTIC VALVE CALCIFICATION AND HEMODYNAMIC SEVERITY OF AORTIC STENOSIS: RESULTS FROM THE PROGRESSA STUDY. Can J Cardiol 2017. [DOI: 10.1016/j.cjca.2017.07.354] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
|
73
|
Shen M, Wegner S, Trébosc J, Hu B, Lafon O, Amoureux JP. Minimizing the t 1-noise when using an indirect 1H high-resolution detection of unlabeled samples. SOLID STATE NUCLEAR MAGNETIC RESONANCE 2017; 87:111-116. [PMID: 28688541 DOI: 10.1016/j.ssnmr.2017.06.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Revised: 06/25/2017] [Accepted: 06/26/2017] [Indexed: 06/07/2023]
Abstract
The most utilized through-space correlation 1H-{X} methods with proton indirect detection use two consecutive transfers, 1H → X and then X → 1H, with the evolution time t1 in the middle. When the X isotope is not 100% naturally abundant (NA), only the signal of the protons close to these isotopes is modulated by the 1H-X dipolar interactions. This signal is theoretically disentangled with phase-cycling from the un-modulated one. However, this separation is never perfect and it may lead to t1-noise in case of isotopes with very small NA, such as 13C or even worse 15N. One way to reduce this t1-noise is to minimize, 'purge', during t1 the un-modulated 1H magnetization before trying to suppress it with phase-cycling. We analyze experimentally several sequences following the HORROR condition, which allow purging the 1H transverse magnetization. The comparison is made at three spinning speeds, including very fast ones for 1H resolution: 27.75, 55.5 and 111 kHz. We show (i) that the efficiency of this purging process increases with the spinning speed, and (ii) that the best recoupling sequences are the two simplest ones: XY and S1 = SR212. We then compare the S/N that can be achieved with the two most used 1H-{X} 2D methods, called D-HMQC and CP-CP. The only difference in between these two methods is that the transfers are done with either two π/2-pulses on X channel (D-HMQC), or two Cross-Polarization (CP) transfers (CP-CP). The first method, D-HMQC, is very robust and should be preferred when indirectly detecting nuclei with high NA. The second method, CP-CP, (i) requires experimental precautions to limit the t1-noise, and (ii) is difficult to use with quadrupolar nuclei because the two CP transfers are then not efficient nor robust. However, CP-CP is presently the best method to indirectly detect isotopes with small NA, such as 13C and 15N.
Collapse
|
74
|
Clisson M, Annabi M, Hervault M, Shen M, Perron M, Boilard A, Tastet L, Clavel M. SEX DIFFERENCES IN AORTIC STENOSIS: INSIGHT FROM DYSLIPIDEMIC AND DIABETIC MOUSE MODEL. Can J Cardiol 2017. [DOI: 10.1016/j.cjca.2017.07.355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
|
75
|
Retnakaran R, Wen SW, Tan H, Zhou S, Ye C, Shen M, Smith GN, Walker MC. Maternal pre-gravid cardiometabolic health and infant birthweight: A prospective pre-conception cohort study. Nutr Metab Cardiovasc Dis 2017; 27:723-730. [PMID: 28693965 DOI: 10.1016/j.numecd.2017.05.005] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/06/2017] [Revised: 05/11/2017] [Accepted: 05/12/2017] [Indexed: 10/19/2022]
Abstract
BACKGROUND AND AIMS Both low birthweight and high birthweight have been associated with the development of cardiometabolic disease in adulthood, possibly reflecting the effect of intrauterine fetal programming. As developmental programming can begin before conception, pre-gravid factors that predict birthweight may be relevant in this context. However, little is known about such factors. Thus, we established a pre-conception cohort to identify maternal pre-gravid cardiometabolic determinants of infant birthweight. METHODS AND RESULTS In this prospective observational cohort study, 1484 newly-married women in Liuyang, China, underwent baseline (pre-gravid) evaluation and then were followed across a subsequent pregnancy. Pre-gravid cardiometabolic characterization consisted of clinical (anthropometry, blood pressure) and biochemical evaluation (total/LDL/HDL cholesterol, triglycerides, glucose) at median 20 weeks before a singleton pregnancy. Mean birthweight was 3294 ± 444 g, with 173 neonates large-for-gestational-age (LGA) and 110 small-for-gestational-age (SGA). On multiple linear regression analysis, positive determinants of birthweight were maternal age, pre-gravid body mass index (BMI), weight gain in pregnancy, length of gestation, and male infant (all p ≤ 0.0003). On logistic regression analysis, independent predictors of an LGA delivery were maternal age (OR = 1.10 per year, 95%CI 1.03-1.18), pre-gravid BMI (OR = 1.21 per kg/m2, 1.07-1.37), and gestational weight gain (OR = 1.10 per kg, 1.06-1.14). The only independent predictor of SGA was gestational weight gain (OR = 0.93 per kg, 0.89-0.97). CONCLUSION Maternal weight before and during pregnancy is the predominant cardiometabolic determinant of infant birthweight, rather than pre-gravid blood pressure, glucose or lipid profile.
Collapse
|