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Cui R, Gao B, Ge R, Li M, Li M, Lu X, Jiang S. The effects of COVID-19 infection on working memory: a systematic review. Curr Med Res Opin 2024; 40:217-227. [PMID: 38008952 DOI: 10.1080/03007995.2023.2286312] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Accepted: 11/17/2023] [Indexed: 11/28/2023]
Abstract
BACKGROUND Studies demonstrate that people who have been infected by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), the causative agent of COVID-19, have experienced cognitive dysfunction, including working memory impairment, executive dysfunction, and decreased concentration. This review aimed to explore the incidence of working memory impairment and possible concomitant symptoms in the acute phase (< 3 months) and chronic phase (> 6 months) of COVID-19. METHODS We conducted a systematic review of the following databases for inception: MEDLINE via Pub Med, Cochrane EMBASE, and Web of Science electronic databases. The search strategy was comprised of all the observational studies with COVID-19 patients confirmed by PCR or serology who were infected by SARS-CoV-2 with no previous cognitive impairment. This review protocol was recorded on PROSPERO with registration number CRD 42023413454. RESULTS A total of 16 studies from 502 retrieved articles were included. COVID-19 could cause a decline in working memory ability, the results showed that 22.5-55% of the people suffered from working memory impairment in the acute phase (< 3 months) of COVID-19, at 6 months after SARS-CoV2 infection, the impairment of working memory caused by COVID-19 still existed, the prevalence was about 6.2-10%, and 41.1% of the patients had a slight decrease in working memory or a negative change in the boundary value. Moreover, concomitant symptoms could persist for a long time. To some extent, the performance of working memory was affected by age, the time after infection, and the severity of infection (β = -.132, p <.001; β = .098, p <.001; β = .075, p = .003). The mechanism of working memory impairment after infection was mainly focused on the aspects of neuroinflammation and the nerve invasiveness of the virus; at the same time, we also noticed some changes of the brain parenchymal structure. CONCLUSION COVID-19 can cause a decline in working memory ability, accompanied by neurological symptoms. However, there is a lack of studies to identify the structural and functional changes in specific brain regions that relate to the impaired working memory.
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Affiliation(s)
- Rui Cui
- College of Sports Medicine and Rehabilitation, Beijing Sport University, Beijing, China
| | - BeiYao Gao
- Department of Rehabilitation Medicine, The China-Japan Friendship Hospital, Beijing, China
| | - RuiDong Ge
- Department of Rehabilitation Medicine, The China-Japan Friendship Hospital, Beijing, China
| | - MingZhen Li
- Department of Rehabilitation Medicine, The China-Japan Friendship Hospital, Beijing, China
| | - Min Li
- Department of Rehabilitation Medicine, The China-Japan Friendship Hospital, Beijing, China
| | - Xi Lu
- Department of Rehabilitation Medicine, The China-Japan Friendship Hospital, Beijing, China
| | - Shan Jiang
- Department of Rehabilitation Medicine, The China-Japan Friendship Hospital, Beijing, China
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Zhang W, Yin J, Gao BY, Lu X, Duan YJ, Liu XY, Li MZ, Jiang S. Inhibition of astroglial hemichannels ameliorates infrasonic noise induced short-term learning and memory impairment. Behav Brain Funct 2023; 19:23. [PMID: 38110991 PMCID: PMC10726613 DOI: 10.1186/s12993-023-00226-7] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Accepted: 12/13/2023] [Indexed: 12/20/2023]
Abstract
As a kind of environmental noise, infrasonic noise has negative effects on various human organs. To date, research has shown that infrasound impairs cognitive function, especially the ability for learning and memory. Previously, we demonstrated that impaired learning and memory induced by infrasound was closely related with glia activation; however, the underlying mechanisms remain unclear. Connexin 43 hemichannels (Cx43 HCs), which are mainly expressed in hippocampal astrocytes, are activated under pathological conditions, lending support to the hypothesis that Cx43 HCs might function in the impaired learning and memory induced by infrasound. This study revealed that that blocking hippocampal Cx43 HCs or downregulating hippocampal Cx43 expression significantly alleviated impaired learning and memory induced by infrasound. We also observed that infrasound exposure led to the abundant release of glutamate and ATP through Cx43 HCs. In addition, the abundant release of glutamate and ATP depended on proinflammatory cytokines. Our finds suggested that the enhanced release of ATP and glutamate by astroglial Cx43 HCs may be involved in the learning and memory deficits caused by infrasound exposure.
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Affiliation(s)
- Wei Zhang
- Teaching and Evaluation Center of Air Force Medical University, Xi'an, 710032, China
| | - Jue Yin
- Department of Rehabilitation Medicine, The China-Japan Friendship Hospital, No.2 Ying Hua Yuan East Street, Beijing, 100029, People's Republic of China
| | - Bei-Yao Gao
- Department of Rehabilitation Medicine, The China-Japan Friendship Hospital, No.2 Ying Hua Yuan East Street, Beijing, 100029, People's Republic of China
| | - Xi Lu
- Department of Rehabilitation Medicine, The China-Japan Friendship Hospital, No.2 Ying Hua Yuan East Street, Beijing, 100029, People's Republic of China
| | - Ya-Jing Duan
- Department of Rehabilitation Medicine, The China-Japan Friendship Hospital, No.2 Ying Hua Yuan East Street, Beijing, 100029, People's Republic of China
| | - Xu-Yan Liu
- Department of Rehabilitation Medicine, The China-Japan Friendship Hospital, No.2 Ying Hua Yuan East Street, Beijing, 100029, People's Republic of China
| | - Ming-Zhen Li
- Department of Rehabilitation Medicine, The China-Japan Friendship Hospital, No.2 Ying Hua Yuan East Street, Beijing, 100029, People's Republic of China
| | - Shan Jiang
- Department of Rehabilitation Medicine, The China-Japan Friendship Hospital, No.2 Ying Hua Yuan East Street, Beijing, 100029, People's Republic of China.
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Huang JJ, Yuan L, Zhuo ZQ, Li MZ, Wu XD. The risk factors involved in airway mucus plug in children with ADV Pneumonia. BMC Pulm Med 2023; 23:446. [PMID: 37978491 PMCID: PMC10655482 DOI: 10.1186/s12890-023-02756-2] [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] [Received: 06/03/2023] [Accepted: 11/08/2023] [Indexed: 11/19/2023] Open
Abstract
BACKGROUND The risk factors for mucus plug in children with adenovirus (ADV) pneumonia. METHODS AND MATERIALS A retrospective analysis was conducted of children diagnosed ADV pneumonia and underwent fiberoptic bronchoscopy admitted to the Xiamen Children's Hospital from September 2018 to September 2021.The patients were divided into a mucus plug group (39 cases) and a non-mucus plug group (53 cases). The children's data including sex, age, clinical presentation, laboratory test parameters, imaging and bronchoscopic data were collected. The risk factors for the development of airway mucus plug were analysed by multifactorial logistic regression. RESULTS There were no statistically significant differences in sex, age, fever, hospitalization days, mixed infection, white blood cells (WBC) count, percentage of neutrophils (NE%), C-reactive protein(CRP), and D-dimer (all P > 0.05); Thermal range, procalcitonin (PCT), lactate dehydrogenase (LDH), Pleural effusion and associated decreased breath sounds was significantly higher in mucus plug group than in non-mucus plug group, and the differences were statistically significant (all P < 0.05); multifactorial logistic regression analysis showed that the duration of fever, PCT, and LDH were independent risk factors for the formation of mucus plugs. The critical values of ROC curves were pyroprocedure ≥ 6.5 d, PCT ≥ 0.705 ng/ml and LDH ≥ 478.5 U/L. CONCLUSION Duration of fever, PCT and LDH levels were the independent risk factors for the formation of an airway mucus plug in children with ADV pneumonia.
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Affiliation(s)
- Jing-Jing Huang
- Department of Infection, Xiamen Children's Hospital (Children's Hospital of Fudan University at Xiamen), NO.92 Yibin Road, Huli District, Xiamen, 361006, Fujian, China
| | - Lin Yuan
- Department of Infection, Xiamen Children's Hospital (Children's Hospital of Fudan University at Xiamen), NO.92 Yibin Road, Huli District, Xiamen, 361006, Fujian, China
| | - Zhi-Qiang Zhuo
- Department of Infection, Xiamen Children's Hospital (Children's Hospital of Fudan University at Xiamen), NO.92 Yibin Road, Huli District, Xiamen, 361006, Fujian, China
| | - Ming-Zhen Li
- Department of Infection, Xiamen Children's Hospital (Children's Hospital of Fudan University at Xiamen), NO.92 Yibin Road, Huli District, Xiamen, 361006, Fujian, China
| | - Xing-Dong Wu
- Department of Infection, Xiamen Children's Hospital (Children's Hospital of Fudan University at Xiamen), NO.92 Yibin Road, Huli District, Xiamen, 361006, Fujian, China.
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Bai S, Li MZ, Wan YY, Hu XC, Liu YX, Tong XH, Guo TH, Zong L, Liu R, Zhao YQ, Xiang P, Xu B, Jiang XH. Association between MTHFR c.677C>T variant and erectile dysfunction among males attending fertility clinic. Asian J Androl 2023; 26:00129336-990000000-00124. [PMID: 37738148 PMCID: PMC10846823 DOI: 10.4103/aja202335] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Accepted: 06/20/2023] [Indexed: 09/24/2023] Open
Abstract
ABSTRACT Genetic risk factors have been shown to contribute to the development of sexual dysfunction. However, the role of methylenetetrahydrofolate reductase (MTHFR) gene variants in the risk of erectile dysfunction (ED) remains unclear. In this study, we recruited 1254 participants who underwent ED assessed by the International Index of Erectile Function-5. The MTHFR c.677C>T variant was also measured by fluorescence polymerase chain reaction (PCR). No significant difference in the genotypic frequency of the MTHFR C677T polymorphism (CC, CT, and TT) was observed between men from the ED and non-ED groups. In addition, on binary logistic regression analysis, both crude and adjusted models showed that the risk of ED was not significantly associated with the C677T polymorphism. Interestingly, a significantly higher frequency of the 677TT polymorphism was found in severe and moderate ED (P = 0.02). The positive correlation between the MTHFR 677TT polymorphism and severe ED was confirmed by logistic regression analysis, even after adjusting for potential confounders (odds ratio [OR] = 2.46, 95% confidence interval [CI]: 1.15-5.50, P = 0.02). These findings suggest a positive correlation between the MTHFR 677TT polymorphism and the risk of severe ED. Identification of MTHFR gene polymorphisms may provide complementary information for ED patients during routine clinical diagnosis.
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Affiliation(s)
- Shun Bai
- Department of Gynecology and Obstetrics, Reproductive and Genetic Hospital, The First Affiliated Hospital of University of Science and Technology of China, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei 230001, China
| | - Ming-Zhen Li
- NHC Key Laboratory of Male Reproduction and Genetics, Guangdong Provincial Reproductive Science Institute (Guangdong Provincial Fertility Hospital), Guangzhou 510600, China
| | - Yang-Yang Wan
- Department of Gynecology and Obstetrics, Reproductive and Genetic Hospital, The First Affiliated Hospital of University of Science and Technology of China, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei 230001, China
| | - Xue-Chun Hu
- Department of Urology, The First Affiliated Hospital of University of Science and Technology of China, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei 230001, China
| | - Yi-Xun Liu
- Department of Urology, The First Affiliated Hospital of University of Science and Technology of China, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei 230001, China
| | - Xian-Hong Tong
- Department of Gynecology and Obstetrics, Reproductive and Genetic Hospital, The First Affiliated Hospital of University of Science and Technology of China, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei 230001, China
| | - Tong-Hang Guo
- Department of Gynecology and Obstetrics, Reproductive and Genetic Hospital, The First Affiliated Hospital of University of Science and Technology of China, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei 230001, China
| | - Lu Zong
- Department of Gynecology and Obstetrics, Reproductive and Genetic Hospital, The First Affiliated Hospital of University of Science and Technology of China, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei 230001, China
| | - Ran Liu
- Department of Gynecology and Obstetrics, Reproductive and Genetic Hospital, The First Affiliated Hospital of University of Science and Technology of China, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei 230001, China
| | - Yuan-Qi Zhao
- Department of Gynecology and Obstetrics, Reproductive and Genetic Hospital, The First Affiliated Hospital of University of Science and Technology of China, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei 230001, China
- Wannan Medical College, Wuhu 241002, China
| | - Ping Xiang
- Department of Urology, The First Affiliated Hospital of University of Science and Technology of China, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei 230001, China
| | - Bo Xu
- Department of Gynecology and Obstetrics, Reproductive and Genetic Hospital, The First Affiliated Hospital of University of Science and Technology of China, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei 230001, China
| | - Xiao-Hua Jiang
- Department of Gynecology and Obstetrics, Reproductive and Genetic Hospital, The First Affiliated Hospital of University of Science and Technology of China, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei 230001, China
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Hong CY, Wang FL, Zhang YT, Tao FX, Ji LC, Lai PX, Li MZ, Yang CG, Tan WG, Jiang Q. Time-trend analysis of tuberculosis diagnosis in Shenzhen, China between 2011 and 2020. Front Public Health 2023; 11:1059433. [PMID: 36891348 PMCID: PMC9986421 DOI: 10.3389/fpubh.2023.1059433] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2022] [Accepted: 01/31/2023] [Indexed: 02/22/2023] Open
Abstract
Objective To describe the trend of tuberculosis (TB) diagnosis in the migrant city Shenzhen, China, and analyze the risk factors of diagnosis delays. Methods Demographic and clinical information of TB patients from 2011 to 2020 in Shenzhen were extracted. A bundle of measures to enhance TB diagnosis had been implemented since late 2017. We calculated the proportions of patients who underwent a patient delay (>30 days from syndrome onset to first care-seeking) or a hospital delay (>4 days from first care-seeking to TB diagnosis). Multivariable logistic regression was used to analyze the risk factors of diagnosis delays. Results During the study period, 43,846 patients with active pulmonary TB were diagnosed and registered in Shenzhen. On average, the bacteriological positivity rate of the patients was 54.9%, and this increased from 38.6% in 2017 to 74.2% in 2020. Overall, 30.3 and 31.1% of patients had a patient delay or a hospital delay, respectively. Molecular testing significantly increased bacteriological positivity and decreased the risk of hospital delay. People >35 years old, the unemployed, and residents had a higher risk of delays in both patient care-seeking and hospital diagnosis than younger people, workers, or migrants. Compared with passive case-finding, active case-finding significantly decreased the risk of patient delay by 5.47 (4.85-6.19) times. Conclusion The bacteriological positivity rate of TB patients in Shenzhen increased significantly but the diagnosis delays were still serious, which may need more attention when active case-finding in risk populations and optimization of molecular testing.
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Affiliation(s)
- Chuang-Yue Hong
- Department of Tuberculosis Prevention and Control, Shenzhen Center for Chronic Disease Control, Shenzhen, Guangdong, China
| | - Fu-Lin Wang
- Department of Epidemiology and Biostatistics, School of Public Health, Wuhan University, Wuhan, Hubei, China
| | - You-Tong Zhang
- Department of Epidemiology and Biostatistics, School of Public Health, Wuhan University, Wuhan, Hubei, China
| | - Feng-Xi Tao
- Department of Epidemiology and Biostatistics, School of Public Health, Wuhan University, Wuhan, Hubei, China
| | - Le-Cai Ji
- Department of Tuberculosis Prevention and Control, Shenzhen Center for Chronic Disease Control, Shenzhen, Guangdong, China
| | - Pei-Xuan Lai
- Department of Tuberculosis Prevention and Control, Shenzhen Center for Chronic Disease Control, Shenzhen, Guangdong, China
| | - Ming-Zhen Li
- Department of Tuberculosis Prevention and Control, Shenzhen Center for Chronic Disease Control, Shenzhen, Guangdong, China
| | - Chong-Guang Yang
- School of Public Health (Shenzhen), Sun Yat-sen University, Shenzhen, Guangdong, China
| | - Wei-Guo Tan
- Department of Tuberculosis Prevention and Control, Shenzhen Center for Chronic Disease Control, Shenzhen, Guangdong, China
| | - Qi Jiang
- Department of Epidemiology and Biostatistics, School of Public Health, Wuhan University, Wuhan, Hubei, China
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Chang C, Zhang HP, Zhao R, Li FC, Luo P, Li MZ, Bai HY. Liquid-like atoms in dense-packed solid glasses. Nat Mater 2022; 21:1240-1245. [PMID: 35970963 DOI: 10.1038/s41563-022-01327-w] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Accepted: 06/30/2022] [Indexed: 06/15/2023]
Abstract
Revealing the microscopic structural and dynamic pictures of glasses is a long-standing challenge for scientists1,2. Extensive studies on the structure and relaxation dynamics of glasses have constructed the current classical picture3-5: glasses consist of some 'soft zones' of loosely bound atoms embedded in a tightly bound atomic matrix. Recent experiments have found an additional fast process in the relaxation spectra6-9, but the underlying physics of this process remains unclear. Here, combining extensive dynamic experiments and computer simulations, we reveal that this fast relaxation is associated with string-like diffusion of liquid-like atoms, which are inherited from the high-temperature liquids. Even at room temperature, some atoms in dense-packed metallic glasses can diffuse just as easily as they would in liquid states, with an experimentally determined viscosity as low as 107 Pa·s. This finding extends our current microscopic picture of glass solids and might help establish the dynamics-property relationship of glasses4.
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Affiliation(s)
- C Chang
- Institute of Physics, Chinese Academy of Sciences, Beijing, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, China
| | - H P Zhang
- Institute of Physics, Chinese Academy of Sciences, Beijing, China
| | - R Zhao
- Institute of Physics, Chinese Academy of Sciences, Beijing, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, China
| | - F C Li
- Institute of Physics, Chinese Academy of Sciences, Beijing, China
| | - P Luo
- Institute of Physics, Chinese Academy of Sciences, Beijing, China
| | - M Z Li
- Department of Physics, Renmin University of China, Beijing, China
| | - H Y Bai
- Institute of Physics, Chinese Academy of Sciences, Beijing, China.
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, China.
- Songshan Lake Materials Laboratory, Dongguan, Guangdong, China.
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Su DQ, Li MZ, Zhuo ZQ. [A case of confirmed with Arcobacter skirrowii infection]. Zhonghua Er Ke Za Zhi 2022; 60:602-603. [PMID: 35658372 DOI: 10.3760/cma.j.cn112140-20220117-00053] [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: 06/15/2023]
Affiliation(s)
- D Q Su
- Department of Nephrology, Children Hospital of Fudan University Xiamen Branch (Xiamen Children's Hospital), Xiamen 361006, China
| | - M Z Li
- Department of Infectious, Children Hospital of Fudan University Xiamen Branch (Xiamen Children's Hospital), Xiamen 361006, China
| | - Z Q Zhuo
- Department of Infectious, Children Hospital of Fudan University Xiamen Branch (Xiamen Children's Hospital), Xiamen 361006, China
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Li MZ, Wei LH. [Biology of HPV mediated carcinogenesis and advances of prophylactic means in targeting HPV infection]. Zhonghua Fu Chan Ke Za Zhi 2022; 57:152-155. [PMID: 35184475 DOI: 10.3760/cma.j.cn112141-20211209-00726] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
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Suo LD, Zhao D, Chen M, Li J, Dong M, Wang YT, Yu XL, Li MZ, Huang F, Pang XH, Lu L. [An investigation on serum antibody level of varicella-zoster virus in healthy population in Beijing]. Zhonghua Yu Fang Yi Xue Za Zhi 2022; 56:108-113. [PMID: 35184436 DOI: 10.3760/cma.j.cn112150-20211221-01174] [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] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Objective: To assess the level and trend of varicella-zoster virus (VZV) antibody among healthy population in Beijing in 2017, after the five-year implementation of the two doses varicella vaccination strategy in 2012, and to provide evidence for scientific evaluation of immunization strategy. Methods: A total of 2 144 subjects in ten age groups from 8 districts of Beijing city were recruited in this study using cross-sectional survey based on multi-stage cluster random sampling method. Serum samples were collected and VZV antibody was detected by ELISA. The influencing factors of antibody concentration and positive rate were analyzed and compared with the study in 2012. The antibody concentration and antibody positive rate were analyzed by nonparametric test and χ² test respectively. Results: The ratio of subjects with registered residence in Beijing city to other provinces was 1∶1. The ratio of male to female was 1∶1.08. The median concentration of VZV antibody was 341.4 (78.6, 1 497.8) mIU/ml, and the total antibody positive rate was 71.1% (1 524/2 144). There were significant differences in antibody positive rate (χ²=736.39, P<0.01) and antibody concentration (χ²=740.34, P<0.01) among different age groups. The antibody positive rate generally increased with age (χ²trend=7.32, Ptrend<0.01). Among 862 children under 14 years old, the antibody positive rate of two doses vaccination 72.8% (182/250) was significantly higher than that of one dose vaccination 51.9% (154/297) (χ²=25.14, P<0.01). There was significant difference between 1-4 years old group (χ²=11.71, P<0.01) and 10-14 years old group (χ²=5.95, P=0.02), but not in 5-9 years old group (χ²=3.00, P=0.07). Compared with the study in 2012, the antibody positive rate increased in 5-9 years old group (χ²=14.35, P<0.01) and decreased in 1-4 years old group (χ²=11.51, P=0.01) in 2017. Conclusion: The recommended varicella booster vaccination has significantly improved the VZV antibody level of children in Beijing city. In the future, it is necessary to explore a more optimized two doses varicella vaccination schedule for children in combination with epidemiological evidence.
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Affiliation(s)
- L D Suo
- Institute of Immunization and Prevention, Beijing Municipal Center for Disease Prevention and Control, Beijing Research Center for Preventive Medicine, Institute of Immunization and Prevention, Beijing 100013, China
| | - D Zhao
- Institute of Immunization and Prevention, Beijing Municipal Center for Disease Prevention and Control, Beijing Research Center for Preventive Medicine, Institute of Immunization and Prevention, Beijing 100013, China
| | - M Chen
- Institute of Immunization and Prevention, Beijing Municipal Center for Disease Prevention and Control, Beijing Research Center for Preventive Medicine, Institute of Immunization and Prevention, Beijing 100013, China
| | - J Li
- Institute of Immunization and Prevention, Beijing Municipal Center for Disease Prevention and Control, Beijing Research Center for Preventive Medicine, Institute of Immunization and Prevention, Beijing 100013, China
| | - M Dong
- Institute of Immunization and Prevention, Beijing Municipal Center for Disease Prevention and Control, Beijing Research Center for Preventive Medicine, Institute of Immunization and Prevention, Beijing 100013, China
| | - Y T Wang
- Institute of Immunization and Prevention, Beijing Municipal Center for Disease Prevention and Control, Beijing Research Center for Preventive Medicine, Institute of Immunization and Prevention, Beijing 100013, China
| | - X L Yu
- Institute of Immunization and Prevention, Beijing Municipal Center for Disease Prevention and Control, Beijing Research Center for Preventive Medicine, Institute of Immunization and Prevention, Beijing 100013, China
| | - M Z Li
- Institute of Immunization and Prevention, Beijing Municipal Center for Disease Prevention and Control, Beijing Research Center for Preventive Medicine, Institute of Immunization and Prevention, Beijing 100013, China
| | - F Huang
- Institute of Immunization and Prevention, Beijing Municipal Center for Disease Prevention and Control, Beijing Research Center for Preventive Medicine, Institute of Immunization and Prevention, Beijing 100013, China
| | - X H Pang
- Institute of Immunization and Prevention, Beijing Municipal Center for Disease Prevention and Control, Beijing Research Center for Preventive Medicine, Institute of Immunization and Prevention, Beijing 100013, China
| | - L Lu
- Institute of Immunization and Prevention, Beijing Municipal Center for Disease Prevention and Control, Beijing Research Center for Preventive Medicine, Institute of Immunization and Prevention, Beijing 100013, China
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Luo M, Gong C, Luo Q, Li AH, Wang X, Li MZ, Xie H, Wang YT, Zhang HR, Huang F. [Epidemiological characteristics of Chlamydia pneumoniae in cases with acute respiratory infection in Beijing, 2015-2019]. Zhonghua Liu Xing Bing Xue Za Zhi 2021; 42:1466-1474. [PMID: 34814569 DOI: 10.3760/cma.j.cn112338-20210522-00421] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Objective: To analyze the epidemiological characteristics of Chlamydia pneumoniae infection among patients with acute respiratory infection in Beijing from 2015 to 2019. Methods: The epidemiological data of acute respiratory infection patients from 35 sentinel hospitals in Beijing were collected by the respiratory pathogen surveillance system in Beijing. The clinical samples were collected to detect Chlamydia pneumoniae, and the sequence of the VD4 region of the ompA gene in positive samples was analyzed. Results: From January 2015 to December 2019, the overall positive rate of Chlamydia pneumoniae among patients with acute respiratory infection in Beijing was 0.34% (129/37 460). The positive rate of Chlamydia pneumoniae generally increased in March, reaching the peak in May, and started to drop in July, with a duration of about 5-8 months. The epidemic season in different years fluctuated by 1-2 months. The positive monthly rate of Chlamydia pneumoniae was no less than 0.30% in every epidemic season. The positive rate of Chlamydia pneumoniae was the highest in the 5-44 years old group and the highest in 10-14 year-olds. The risk of Chlamydia pneumoniae infection increased with age in patients younger than 25 years old and decreased in those older one aged than 25 years of age. The positive rates in male and female patients were 0.33% (68/20 830) and 0.37% (61/16 528), respectively, and there was no significant difference between the two groups (χ2=0.486, P=0.486). The positive rate of Chlamydia pneumoniae in patients with common pneumonia was higher than that in patients with upper pneumonia and severe pneumonia (χ2=36.797, P<0.01). Other respiratory pathogens were also detected in the Chlamydia pneumoniae samples, and the top four pathogens appeared as Haemophilus influenzae (15 cases), Streptococcus pneumoniae (13 cases), Rhinovirus (8 cases), and Stenotrophomonas maltophilia (7 cases). 101 strains of 129 Chlamydia pneumoniae positive samples were identified as type A by sequencing. Conclusions: The annual epidemic pattern of Chlamydia pneumoniae in Beijing, is unimodal, and the epidemic season generally appears from March to July. The seasonal characteristics of Chlamydia pneumoniae in Beijing can be used for the differential diagnosis of Chlamydia pneumoniae from other respiratory pathogens. Chlamydia pneumoniae is most common in people aged 5-44 years, and the primary genotype is type A. People aged 10-44 years old suffer the highest incidence. If the nucleic acid positive rate of Chlamydia pneumoniae exceeds 0.30% for two consecutive months, the high prevalence period of Chlamydia pneumoniae can be preliminarily expected. Chlamydia pneumoniae infection has a higher probability of progressing to severe pneumonia from general pneumonia.
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Affiliation(s)
- M Luo
- Department of Immunization, Beijing Center for Disease Prevention and Control/Beijing Research Center for Preventive Medicine,Beijing 100013, China
| | - C Gong
- Department of Immunization, Beijing Center for Disease Prevention and Control/Beijing Research Center for Preventive Medicine,Beijing 100013, China
| | - Q Luo
- School of Public Health,Capital Medical University, Beijing 100069, China
| | - A H Li
- Department of Immunization, Beijing Center for Disease Prevention and Control/Beijing Research Center for Preventive Medicine,Beijing 100013, China
| | - X Wang
- Department of Immunization, Beijing Center for Disease Prevention and Control/Beijing Research Center for Preventive Medicine,Beijing 100013, China
| | - M Z Li
- Department of Immunization, Beijing Center for Disease Prevention and Control/Beijing Research Center for Preventive Medicine,Beijing 100013, China
| | - H Xie
- Department of Immunization, Beijing Center for Disease Prevention and Control/Beijing Research Center for Preventive Medicine,Beijing 100013, China
| | - Y T Wang
- Department of Immunization, Beijing Center for Disease Prevention and Control/Beijing Research Center for Preventive Medicine,Beijing 100013, China
| | - H R Zhang
- Department of Immunization, Beijing Center for Disease Prevention and Control/Beijing Research Center for Preventive Medicine,Beijing 100013, China
| | - F Huang
- Department of Immunization, Beijing Center for Disease Prevention and Control/Beijing Research Center for Preventive Medicine,Beijing 100013, China
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Luo M, Wang X, Li AH, Luo Q, Xie H, Li MZ, Wang YT, Dong M, Zhang HR, Gong C. [Clinical characteristics of patients infected with Chlamydia pneumoniae in Beijing from 2015 to 2019]. Zhonghua Yu Fang Yi Xue Za Zhi 2021; 55:938-944. [PMID: 34404200 DOI: 10.3760/cma.j.cn112150-20210524-00500] [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
Objective: To aralyze the clinical characteristics of Chlamydia pneumoniae infection in Beijing. Methods: Based on Beijing Respiratory Pathogen Surveillance System, acute respiratory infection patients were recruited from 35 different types of sentinel hospitals in Beijing. Their epidemiological and clinical data were systematically collected and clinical specimens were also obtained. Nuclear acid testing was performed for 30 types of respiratory pathogens (including Chlamydia pneumoniae). The identified patients of Chlamydia pneumoniae infection were divided into two groups, the acute upper respiratory tract infection (AURI) group and pneumoniae group. The differences in clinical characteristics, laboratory examination and prognosis were compared by using independent sample t test, Mann-Whitney U test, χ2 test or Fisher's exact probability test. Results: A total of 119 patients of Chlamydia pneumoniae infection were included, including 12 patients in the AURI group and 107 patients in pneumoniae group. Chlamydia pneumoniae infection mainly occurred in people aged from 5 to 44 years, accounting for 81.5% (97/119). The three most common clinical symptoms were cough (92.4%, 110/119), fever (88.8%, 95/107), and sputum production (76.5%, 91/119). White blood cell counts increased in 39.3% (46/117) of patients. Neutrophile granulocyte proportion increased in 39.7% (46/116) of patients. Platelet count increased in 36.9% (41/111) of patients. An increase of the creatine kinase MB isoenzyme (CKMB) was observed in 12 pneumonia patients (24.5%, 12/49). Radiological examination showed that 90.6% (87/105) of patients in the pneumoniae group had pulmonary parenchymal changes; the lesion occurred most commonly in the lower right lung lobe (34.3%, 36/105) and the lower left lung lobe (27.6%, 29/105). Although 73.8% (79/107) of patients in the pneumoniae group were hospitalized, no case received intensive care unit or mechanical ventilation. As to outcomes, one patient developed respiratory failure and 6 patients suffered myocardial injury. No death was observed in this study. The median days of hospitalization and course of illness for pneumonia patients M(P25,P75) were 10.0 (7.0, 13.0) days and 18.0 (13.5, 22.0) days, respectively. Conclusion: Generally, Chlamydia pneumoniae infections in Beijing from 2015 to 2019 were mild, and the main clinical manifestations were cough, fever and sputum. However, most patients in the pneumoniae group caused by Chlamydia pneumoniae still required hospitalization but with a better outcome.
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Affiliation(s)
- M Luo
- Department of Immunization, Beijing Center for Disease Prevention and Control/Beijing Research Center for Preventive Medicine,Beijing 100013, China
| | - X Wang
- Department of Immunization, Beijing Center for Disease Prevention and Control/Beijing Research Center for Preventive Medicine,Beijing 100013, China
| | - A H Li
- Department of Immunization, Beijing Center for Disease Prevention and Control/Beijing Research Center for Preventive Medicine,Beijing 100013, China
| | - Q Luo
- School of Public Health of Capital Medical University,Beijing 100069,China
| | - H Xie
- Department of Immunization, Beijing Center for Disease Prevention and Control/Beijing Research Center for Preventive Medicine,Beijing 100013, China
| | - M Z Li
- Department of Immunization, Beijing Center for Disease Prevention and Control/Beijing Research Center for Preventive Medicine,Beijing 100013, China
| | - Y T Wang
- Department of Immunization, Beijing Center for Disease Prevention and Control/Beijing Research Center for Preventive Medicine,Beijing 100013, China
| | - M Dong
- Department of Immunization, Beijing Center for Disease Prevention and Control/Beijing Research Center for Preventive Medicine,Beijing 100013, China
| | - H R Zhang
- Department of Immunization, Beijing Center for Disease Prevention and Control/Beijing Research Center for Preventive Medicine,Beijing 100013, China
| | - C Gong
- Department of Immunization, Beijing Center for Disease Prevention and Control/Beijing Research Center for Preventive Medicine,Beijing 100013, China
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Wang YY, Huang Q, Shen Q, Zi H, Li BH, Li MZ, He SH, Zeng XT, Yao X, Jin YH. Quality of and Recommendations for Relevant Clinical Practice Guidelines for COVID-19 Management: A Systematic Review and Critical Appraisal. Front Med (Lausanne) 2021; 8:630765. [PMID: 34222270 PMCID: PMC8248791 DOI: 10.3389/fmed.2021.630765] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2020] [Accepted: 04/26/2021] [Indexed: 01/15/2023] Open
Abstract
Background: The morbidity and mortality of coronavirus disease 2019 (COVID-19) are still increasing. This study aimed to assess the quality of relevant COVID-19 clinical practice guidelines (CPGs) and to compare the similarities and differences between recommendations. Methods: A comprehensive search was conducted using electronic databases (PubMed, Embase, and Web of Science) and representative guidelines repositories from December 1, 2019, to August 11, 2020 (updated to April 5, 2021), to obtain eligible CPGs. The Appraisal of Guidelines for Research and Evaluation (AGREE II) tool was used to evaluate the quality of CPGs. Four authors extracted relevant information and completed data extraction forms. All data were analyzed using R version 3.6.0 software. Results: In total, 39 CPGs were identified and the quality was not encouragingly high. The median score (interquartile range, IQR) of every domain from AGREE II for evidence-based CPGs (EB-CPGs) versus (vs.) consensus-based CPG (CB-CPGs) was 81.94% (75.00-84.72) vs. 58.33% (52.78-68.06) in scope and purpose, 59.72% (38.89-75.00) vs. 36.11% (33.33-36.11) in stakeholder involvement, 64.58% (32.29-71.88) vs. 22.92% (16.67-26.56) in rigor of development, 75.00% (52.78-86.81) vs. 52.78% (50.00-63.89) in clarity of presentation, 40.63% (22.40-62.50) vs. 20.83% (13.54-25.00) in applicability, and 58.33% (50.00-100.00) vs. 50.00% (50.00-77.08) in editorial independence, respectively. The methodological quality of EB-CPGs were significantly superior to the CB-CPGs in the majority of domains (P < 0.05). There was no agreement on diagnosis criteria of COVID-19. But a few guidelines show Remdesivir may be beneficial for the patients, hydroxychloroquine +/- azithromycin may not, and there were more consistent suggestions regarding discharge management. For instance, after discharge, isolation management and health status monitoring may be continued. Conclusions: In general, the methodological quality of EB-CPGs is greater than CB-CPGs. However, it is still required to be further improved. Besides, the consistency of COVID-19 recommendations on topics such as diagnosis criteria is different. Of them, hydroxychloroquine +/- azithromycin may be not beneficial to treat patients with COVID-19, but remdesivir may be a favorable risk-benefit in severe COVID-19 infection; isolation management and health status monitoring after discharge may be still necessary. Chemoprophylaxis, including SARS-CoV 2 vaccines and antiviral drugs of COVID-19, still require more trials to confirm this.
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Affiliation(s)
- Yun-Yun Wang
- Center for Evidence-Based and Translational Medicine, Zhongnan Hospital of Wuhan University, Wuhan, China
- Department of Evidence-Based Medicine and Clinical Epidemiology, Second Clinical College, Wuhan University, Wuhan, China
| | - Qiao Huang
- Center for Evidence-Based and Translational Medicine, Zhongnan Hospital of Wuhan University, Wuhan, China
- Department of Evidence-Based Medicine and Clinical Epidemiology, Second Clinical College, Wuhan University, Wuhan, China
| | - Quan Shen
- Department of Evidence-Based Medicine and Clinical Epidemiology, Second Clinical College, Wuhan University, Wuhan, China
- School of Health Sciences, Wuhan University, Wuhan, China
| | - Hao Zi
- Center for Evidence-Based and Translational Medicine, Zhongnan Hospital of Wuhan University, Wuhan, China
- Department of Evidence-Based Medicine and Clinical Epidemiology, Second Clinical College, Wuhan University, Wuhan, China
| | - Bing-Hui Li
- Center for Evidence-Based and Translational Medicine, Zhongnan Hospital of Wuhan University, Wuhan, China
- Department of Evidence-Based Medicine and Clinical Epidemiology, Second Clinical College, Wuhan University, Wuhan, China
| | - Ming-Zhen Li
- Precision Medicine Center, Second People's Hospital of Huaihua, Huaihua, China
| | - Shao-Hua He
- Precision Medicine Center, Second People's Hospital of Huaihua, Huaihua, China
| | - Xian-Tao Zeng
- Center for Evidence-Based and Translational Medicine, Zhongnan Hospital of Wuhan University, Wuhan, China
- Department of Evidence-Based Medicine and Clinical Epidemiology, Second Clinical College, Wuhan University, Wuhan, China
| | - Xiaomei Yao
- Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, ON, Canada
| | - Ying-Hui Jin
- Center for Evidence-Based and Translational Medicine, Zhongnan Hospital of Wuhan University, Wuhan, China
- Department of Evidence-Based Medicine and Clinical Epidemiology, Second Clinical College, Wuhan University, Wuhan, China
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Jiang SQ, Li MZ. Local crystalline order features in disordered packings of monodisperse spheres. J Phys Condens Matter 2021; 33:205401. [PMID: 33770772 DOI: 10.1088/1361-648x/abf271] [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] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Accepted: 03/26/2021] [Indexed: 06/12/2023]
Abstract
A new tetrahedral structure model was developed for disordered sphere packings, including not only regular tetrahedron (T), but also quartoctahedron (Q) and bcc simplex (B), the tetrahedral building blocks in fcc, hcp and bcc crystal structures, respectively. Both geometric frustrated configurations and local configurations associated with crystalline order in disordered packings can be comprehensively characterized. It is found that with increasing packing fraction, the population of T, Q, and B increases. Moreover, the crystal-type local configurations formed by face-adjacent T, Q and B increases as packing fraction increases, which is more prevalent than the geometric frustrated ones formed by face-adjacent T. In addition, as packing fraction increases, the local density of irregular simplexes is found to increase more quickly than regular ones, playing more important roles in the density increase in disordered packings. These structure features are found to be intrinsic in the jammed random sphere packings with different friction coefficients, which is independent of interparticle friction and only determined by the packing fraction. Our findings provide new understanding for the structural nature of disordered packings and the underlying structural basis of the random close packing.
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Affiliation(s)
- S Q Jiang
- Department of Physics, Beijing Key Laboratory of Opto-electronic Functional Materials and Micro-Nano Devices, Renmin University of China, Beijing 100872, People's Republic of China
| | - M Z Li
- Department of Physics, Beijing Key Laboratory of Opto-electronic Functional Materials and Micro-Nano Devices, Renmin University of China, Beijing 100872, People's Republic of China
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Hu Y, Xu YJ, Li MZ, Lan YX, Mao L, Ning QY, Xu W, Yang HL, Zhang YZ. [The prognostic impact of diabetic mellitus and hyperglycemia during DLBCL treatment on patients with diffuse large B-cell lymphoma]. Zhonghua Xue Ye Xue Za Zhi 2021; 42:151-157. [PMID: 33858047 PMCID: PMC8071671 DOI: 10.3760/cma.j.issn.0253-2727.2021.02.011] [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] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
目的 探讨弥漫大B细胞淋巴瘤(DLBCL)患者的临床特征和预后因素,评估合并糖尿病(DM)及治疗过程中发生血糖升高对DLBCL预后的影响。 方法 回顾性收集2009年1月1日至2019年12月31日天津医科大学肿瘤医院及中山大学肿瘤防治中心收治的481例初诊DLBCL患者的临床资料,重点关注其治疗前及治疗中的血糖水平,采用Cox回归风险模型进行单因素分析评估预后影响因素,采用Kaplan-Meier法绘制生存曲线分析血糖异常对DLBCL患者总生存(OS)、无进展生存(PFS)的影响。 结果 82例(17.0%)患者在诊断DLBCL前患DM,88例(18.3%)患者在DLBCL治疗过程中至少发生一次血糖升高。单因素分析显示,年龄、Ann-Arbor分期、IPI评分、是否合并DM与OS、PFS相关(P值均<0.05)。组间比较显示,合并DM组与治疗过程中血糖升高组的OS和PFS均较无血糖异常组差(OS:P值分别为0.001、0.003,PFS:P值均<0.001),合并DM组与治疗过程中血糖升高组相比OS和PFS的差异均无统计学意义(P值分别为0.557、0.463)。化疗期间血糖控制良好组的OS和PFS优于血糖控制差组(OS:P=0.037,PFS:P=0.007)。 结论 合并DM是影响DLBCL患者预后的重要因素,治疗过程中血糖升高与DLBCL患者的不良预后相关。
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Affiliation(s)
- Y Hu
- Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin's Clinical Research Center for Cancer, Tianjin 300060, China State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou 510060, China
| | - Y J Xu
- Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin's Clinical Research Center for Cancer, Tianjin 300060, China State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou 510060, China
| | - M Z Li
- Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin's Clinical Research Center for Cancer, Tianjin 300060, China State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou 510060, China
| | - Y X Lan
- Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin's Clinical Research Center for Cancer, Tianjin 300060, China
| | - L Mao
- Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin's Clinical Research Center for Cancer, Tianjin 300060, China State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou 510060, China
| | - Q Y Ning
- Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin's Clinical Research Center for Cancer, Tianjin 300060, China
| | - W Xu
- Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin's Clinical Research Center for Cancer, Tianjin 300060, China
| | - H L Yang
- Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin's Clinical Research Center for Cancer, Tianjin 300060, China
| | - Y Z Zhang
- Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin's Clinical Research Center for Cancer, Tianjin 300060, China State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou 510060, China
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15
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Cui L, Wang LL, Li XJ, Wang LG, Li MZ, Han B. [Hypertrophic cardiomyopathy complicated with apical left ventricular aneurysm and ventricular tachycardia: a case report]. Zhonghua Xin Xue Guan Bing Za Zhi 2021; 49:276-277. [PMID: 33706463 DOI: 10.3760/cma.j.cn112148-20200413-00307] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Affiliation(s)
- L Cui
- Department of Cardiology, Affiliated Xuzhou Hospital of Medical School of Southeast University,Xuzhou 221009,China
| | - L L Wang
- Department of Cardiology, Affiliated Xuzhou Hospital of Medical School of Southeast University,Xuzhou 221009,China
| | - X J Li
- Department of Cardiology, Affiliated Xuzhou Hospital of Medical School of Southeast University,Xuzhou 221009,China
| | - L G Wang
- Department of Cardiology, Affiliated Xuzhou Hospital of Medical School of Southeast University,Xuzhou 221009,China
| | - M Z Li
- Department of Cardiology, Affiliated Xuzhou Hospital of Medical School of Southeast University,Xuzhou 221009,China
| | - B Han
- Department of Cardiology, Affiliated Xuzhou Hospital of Medical School of Southeast University,Xuzhou 221009,China
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Jiao JL, Zhang HP, Huang Q, Wang W, Sinclair R, Wang G, Ren Q, Lin GT, Huq A, Zhou HD, Li MZ, Ma J. Orbital competition of Mn 3+ and V 3+ ions in Mn 1+x V 2-x O 4. J Phys Condens Matter 2021; 33:134002. [PMID: 33527912 DOI: 10.1088/1361-648x/abd9a1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The structural and magnetic properties of Mn1+x V2-x O4 (0 < x ⩽ 1) have been investigated by the heat capacity, magnetization, x-ray diffraction and neutron diffraction measurements, and a phase diagram of temperature versus composition was built up. For x ⩽ 0.3, a cubic-to-tetragonal (c > a) phase transition was observed. For x > 0.3, the system maintained the tetragonal lattice. Although the collinear and noncollinear magnetic transitions of V3+ ions were obtained in all compositions, the canting angles between the V3+ ions decreased with Mn3+-doping, and the ordering of the Mn3+ ions was only observed as x > 0.4. In order to study the dynamics of the ground state, the first principles simulation was applied to analyze not only the orbital effects of Mn2+, Mn3+, and V3+ ions, but also the related exchange energies.
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Affiliation(s)
- J L Jiao
- Key Laboratory of Artificial Structures and Quantum Control (Ministry of Education), Shenyang National Laboratory for Materials Science, School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China
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Zhan YJ, Zhang LX, Sun MT, Li XM, Wang Y, Li MZ, Tao DD, Sun ET. [DNA barcoding of 4 species of cheyletid mites based on COI and 18S rRNA gene sequences]. Zhongguo Xue Xi Chong Bing Fang Zhi Za Zhi 2020; 33:66-70. [PMID: 33660477 DOI: 10.16250/j.32.1374.2020154] [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: 06/12/2023]
Abstract
OBJECTIVE To analyze the sequences of mitochondrial cytochrome C oxidase subunit I gene (COI) and 18S ribosomal RNA gene (18S rRNA), so as to identify the feasible DNA barcodes for 4 species of cheyletid mites and improve the DNA barcoding database for cheyletid mites. METHODS Cheyletid mite samples were collected from small-scale flour mills in Fuyang, Wuhu and Tongling cities of Anhui Province from May 2018 to July 2019, extracted and morphologically identified. Then, genomic DNA was extracted from a single cheyletid mite, and the COI and 18S rRNA gene sequences were obtained by PCR amplification, cloning and sequencing. The obtained sequences were aligned using the BLAST software. Multiple sequence alignment was done using the software ClustalX version 1.83 using the known gene sequences from cheyletid mites. The genetic distance was calculated using the software MEGA X, and the phylogenetic tree was created using the maximum likelihood method. RESULTS The DNA barcoding results of Cheyletus malaccensis, C. carnifex and Cheletomorpha lepidopterorum were consistent with the morphological identification, while no sequences pertaining to Eucheyletia reticulate were retrieved in the GenBank database. The proportions of A + T were 69.6% and 55.1% in the COI and 18S rRNA sequences of 4 cheyletid mites species, respectively, and the numbers of base substitutions were 137 and 46, respectively. There were 154 to 321 and 58 to 99 inter-species variation loci in the COI and 18S rRNA gene sequences of 4 cheyletid mites species, respectively, and the intra-species genetic distance was all 0.020 or less in the COI and 18S rRNA gene sequences of 4 cheyletid mites species, with inter-species genetic distance of 0.235 to 0.583 and 0.078 to 0.114, respectively. Phylogenetic analysis based on COI and 18S rRNA genes showed that all four species of cheyletid mites were clustered into a branch with a 100% supportive rate, which was consistent with the morphological identification. CONCLUSIONS Mitochondrial COI gene is superior to 18S rRNA gene as DNA barcodes for 4 species of cheyletid mites, which is more suitable to be used to investigate the phylogenetic relationship of at genus and species levels.
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Affiliation(s)
- Y J Zhan
- Department of Hygiene Inspection and Quarantine, Wannan Medical College, Wuhu 241002, China
| | - L X Zhang
- Department of Hygiene Inspection and Quarantine, Wannan Medical College, Wuhu 241002, China
| | - M T Sun
- Department of Hygiene Inspection and Quarantine, Wannan Medical College, Wuhu 241002, China
| | - X M Li
- Department of Hygiene Inspection and Quarantine, Wannan Medical College, Wuhu 241002, China
| | - Y Wang
- Department of Hygiene Inspection and Quarantine, Wannan Medical College, Wuhu 241002, China
| | - M Z Li
- Department of Hygiene Inspection and Quarantine, Wannan Medical College, Wuhu 241002, China
| | - D D Tao
- Department of Hygiene Inspection and Quarantine, Wannan Medical College, Wuhu 241002, China
| | - E T Sun
- Department of Hygiene Inspection and Quarantine, Wannan Medical College, Wuhu 241002, China
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Ma ZY, Han JL, Li MZ. [Preeclampsia and mitral chordea tendinae rupture in case of twin pregnancy: a case report]. Zhonghua Xin Xue Guan Bing Za Zhi 2020; 48:782-784. [PMID: 32957763 DOI: 10.3760/cma.j.cn112148-20191021-00643] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Z Y Ma
- Peking University School of Nursing, Beijing 100191, China; Department of Cardiology and Institute of Vascular Medicine, Peking University Third Hospital, NHC Key Laboratory of Cardiovascular Molecular Biology and Regulatory Peptides, Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing 100191, China
| | - J L Han
- Department of Cardiology and Institute of Vascular Medicine, Peking University Third Hospital, NHC Key Laboratory of Cardiovascular Molecular Biology and Regulatory Peptides, Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing 100191, China
| | - M Z Li
- Peking University School of Nursing, Beijing 100191, China
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Li XY, Zhang HP, Lan S, Abernathy DL, Otomo T, Wang FW, Ren Y, Li MZ, Wang XL. Observation of High-Frequency Transverse Phonons in Metallic Glasses. Phys Rev Lett 2020; 124:225902. [PMID: 32567931 DOI: 10.1103/physrevlett.124.225902] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Accepted: 04/23/2020] [Indexed: 06/11/2023]
Abstract
Using inelastic neutron scattering and molecular dynamics simulations on a model Zr-Cu-Al metallic glass, we show that transverse phonons persist well into the high-frequency regime, and can be detected at large momentum transfer. Furthermore, the apparent peak width of the transverse phonons was found to follow the static structure factor. The one-to-one correspondence, which was demonstrated for both Zr-Cu-Al metallic glass and a three-dimensional Lennard-Jones model glass, suggests a universal correlation between the phonon dynamics and the underlying disordered structure. This remarkable correlation, not found for longitudinal phonons, underscores the key role that transverse phonons hold for understanding the structure-dynamics relationship in disordered materials.
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Affiliation(s)
- X Y Li
- Department of Physics, City University of Hong Kong, 83 Tat Chee Avenue, Hong Kong, China
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 101408, China
| | - H P Zhang
- Department of Physics, Beijing Key Laboratory of Opto-electronic Functional Materials and Micro-nano Devices, Renmin University of China, Beijing 100872, China
| | - S Lan
- Department of Physics, City University of Hong Kong, 83 Tat Chee Avenue, Hong Kong, China
- Herbert Gleiter Institute of Nanoscience, School of Materials Science and Engineering, Nanjing University of Science and Technology, 200 Xiaolingwei Avenue, Nanjing 210094, China
| | - D L Abernathy
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - T Otomo
- Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
| | - F W Wang
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 101408, China
- Songshan Lake Materials Laboratory, Dongguan 523808, China
| | - Y Ren
- X-ray Science Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - M Z Li
- Department of Physics, Beijing Key Laboratory of Opto-electronic Functional Materials and Micro-nano Devices, Renmin University of China, Beijing 100872, China
| | - X-L Wang
- Department of Physics, City University of Hong Kong, 83 Tat Chee Avenue, Hong Kong, China
- Center for Neutron Scattering, City University of Hong Kong Shenzhen Research Institute, 8 Yuexing 1st Road, Shenzhen Hi-Tech Industrial Park, Shenzhen 518057, China
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Abstract
Background Plastic bronchitis is an uncommon but severe respiratory disease characterized by formation of casts in tracheobronchial tree. It can lead to airway obstruction and even respiratory failure. Case presentation Plastic bronchitis is mostly seen in both post-cardiac surgery patients, especially Fontan procedure, and infections including those caused by influenza viruses, Mycoplasma pneumoniae or tuberculosis. But it has rarely been reported to be associated with adenovirus infection. We report 2 cases of plastic bronchitis arising from adenovirus serotype 7 infection, manifested in repeated high fever, cough, and progressive dyspnea, and were diagnosed and eventually cured by bronchoscopy. Conclusions Plastic bronchitis is a rare, variable and potentially fatal disease. In the cases we described, the cause was associated with adenovirus serotype 7 and its treatment required intervention with bronchoscopy and adequate control of the underlying disease.
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Affiliation(s)
- Lin Yuan
- Department of Infectious Diseases, Xiamen Children's Hospital (Children's Hospital of Fudan University Xiamen Branch), 92 Yibin Road, Huli District, Xiamen City, 361006, Fujian Province, China
| | - Jing-Jing Huang
- Department of Infectious Diseases, Xiamen Children's Hospital (Children's Hospital of Fudan University Xiamen Branch), 92 Yibin Road, Huli District, Xiamen City, 361006, Fujian Province, China
| | - Qi-Guo Zhu
- Department of Infectious Diseases, Xiamen Children's Hospital (Children's Hospital of Fudan University Xiamen Branch), 92 Yibin Road, Huli District, Xiamen City, 361006, Fujian Province, China
| | - Ming-Zhen Li
- Department of Infectious Diseases, Xiamen Children's Hospital (Children's Hospital of Fudan University Xiamen Branch), 92 Yibin Road, Huli District, Xiamen City, 361006, Fujian Province, China
| | - Zhi-Qiang Zhuo
- Department of Infectious Diseases, Xiamen Children's Hospital (Children's Hospital of Fudan University Xiamen Branch), 92 Yibin Road, Huli District, Xiamen City, 361006, Fujian Province, China.
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Li MZ, Li KY, Shen J, Xie DH. [Clavien-Dindo classification of complications after complete mesocolic excision in laparoscopic radical resection of right hemicolon cancer and analysis on its influencing factors]. Zhonghua Wei Chang Wai Ke Za Zhi 2020; 23:51-55. [PMID: 31958931 DOI: 10.3760/cma.j.issn.1671-0274.2020.01.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the Clavien-Dindo (CD) classification of complications after complete mesocolic excision (CME) in laparoscopic radical resection of right-sided hemicolon cancer and its influencing factors. Methods: A retrospective case-control study was performed. Inclusion criteria: (1) the adenocarcinoma located at colon from cecum to hepatic flexure; (2) laparoscopic right hemicolectomy with CME was completed. Exclusion criteria: (1) patients had severe organ dysfunction before operation; (2) tumor invaded adjacent organs or developed distant organ metastasis; (3) emergency surgery; (4) failure of laparoscopic surgery, and conversion to laparotomy; (5) without complete clinical data. Finally, clinical data of 141 patients in our hospital form March 2015 to February 2019 were retrospectively analyzed. CD grading standard was used to evaluate postoperative complications. Univariate and multivariate logistic regression analyse were used to analyze the factors that might affect the complications. Survival analysis was conducted by grouping the indicators with statistically significant difference in multivariate analysis. Kaplan-Meier method was used to draw the survival curve and log-rank test was used to analyze the difference. Results: Of the 141 patients, 89 were male and 52 were female with mean age of (61.8±11.0) years. All the operations completed successfully. A total of 37 postoperative complications were developed in 26 (18.4%) patients had postoperative 37 cases of complications, mainly including 7 delayed incision healing, 6 diarrhea, and 5 respiratory dysfunction. According to CD classification standard, grade I, II, and IV a complication rates were 40.5% (15/37), 56.8% (21/37), and 2.7% (1/37) respectively. Univariate analysis showed that age ≥ 65 years (χ(2)=4.338, P=0.037), BMI ≥ 28 kg/m(2) (χ(2)=5.971, P=0.015), and preoperative hemoglobin < 100 g/L (χ(2)=3.985, P=0.046) were risk factors of postoperative complications. Multivariate analysis testified that age ≥ 65 years (OR=7.991, 95%CI: 2.203 to 28.983, P=0.002) and body mass index (BMI) ≥ 28 kg/m(2) (OR=4.231, 95%CI: 1.034 to 17.322, P=0.045) were independent risk factors for complications after laparoscopic CME surgery for right-sided hemicolon cancer. All the patients were followed up for median time of 24 (1-48) months. The log-rank test showed that there were no significant differences in the cumulative survival rate between patients of age < 65 years and age ≥ 65 years (χ(2)=0.986, P=0.321), and between those with BMI < 28 kg/m(2) and BMI ≥ 28 kg/m(2) (χ(2)=0.370, P=0.543). Conclusions: The main complications after CME in laparoscopic radical resection of right hemicolon cancer are CD grade I and II. Elderly and obesity are independent risk factor for postoperative complications. Before the operation, reasonable preventive measures should be taken for the elderly and the obese in order to reduce postoperative complications.
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Affiliation(s)
- M Z Li
- Department of General Surgery, Beijing Chao-Yang Hospital, Capital Medical University, Beijing 100020, China
| | - K Y Li
- Class 2 Grade 2015, Capital Medical University, Beijing 100054, China
| | - J Shen
- Department of General Surgery, Beijing Chao-Yang Hospital, Capital Medical University, Beijing 100020, China
| | - D H Xie
- Department of General Surgery, Beijing Chao-Yang Hospital, Capital Medical University, Beijing 100020, China
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22
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Wang X, Xia B, Wang CY, Li MZ, Xu W, Yuan T, Tian C, Zhao HF, Yang HL, Zhao ZG, Wang XF, Wang YF, Yu Y, Zhang YZ. [A comparative study of induction chemotherapy with or without autologous hematopoietic stem cell transplantation in the treatment of newly diagnosed young medium/high risk diffuse large B cell lymphoma patients]. Zhonghua Xue Ye Xue Za Zhi 2019; 40:117-124. [PMID: 30831626 PMCID: PMC7342668 DOI: 10.3760/cma.j.issn.0253-2727.2019.02.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To compare the efficacy of induction chemotherapy with or without autologous hematopoietic stem cell transplantation (auto-HSCT) for newly diagnosed young diffuse large B cell lymphoma (DLBCL) patients. Methods: The retrospective study was performed in 90 cases of young patients (≤60 years) with newly diagnosed DLBCL and an age-adjusted International Prognostic Index (aa-IPI) score of 2 or 3. All of them were treated with R-CHOP (32 cases, rituximab combined with CHOP), dose-intensive regimens (DA-EPOCH, Hyper CVAD/MA or ESHAP) combined with or without rituximab (25 cases), and consolidated with up-front auto-HSCT (33 cases), respectively. The efficacy and the potential predictors were evaluated. Results: ①The median age of 90 patients was 43 (18-60) years old. The median follow-up time was 42 (3-110) months. ②The 5-year progression-free survival (PFS) for R-CHOP group, dose-intensive chemotherapy group and auto-HSCT group were (33.5±10.7) %, (55.3±10.1) % and (65.8±13.6) % (P=0.012), the 5-year overall survival (OS) were (49.7±9.0) %, (61.6±10.2) % and (78.6±7.8) % (P=0.035), respectively. There was no significant difference in 5-years PFS and OS between the R-CHOP group and dose-intensive chemotherapy group (P=0.519, P=0.437) compared with that of the dose-intensive chemotherapy group, auto-HSCT group has higher 5-year PFS (P=0.042). ③ When stratified with IPI score, the high-risk group treated with auto-HSCT (26 cases) showed similar 5-years PFS and 5-years OS to those in the low-risk group with chemotherapy alone (12 cases were in R-CHOP group and 8 cases were in dose-intensive chemotherapy group) [5-years PFS were (62.3 ±14.3)%, (58.3 ±18.6)% and (51.4±18.7)%, respectively, P=0.686; 5-years OS were (69.2±13.9)%, (62.5±15.5)% and (58.3±18.6)%, respectively, P=0.592]. ④However, the high-risk group treated with auto-HSCT (26 cases) showed superior 5-years PFS (P=0.002) and 5-years OS (P=0.019) compared to the high-risk group with chemotherapy alone (20 cases were in R-CHOP group and 17 cases were in dose-intensive chemotherapy group) [5-years PFS were (62.3±14.3)%, (41.1±13.5)% and (21.9±11.6)%, respectively; 5-years OS were (69.2±13.9)%, (51.5%±14.0)% and (35.4±13.6)%, respectively]. ⑤In the univariate analysis, as a whole, patients diagnosed with GCB subtype had higher 3-years PFS (P=0.022) and 3-years OS (P=0.037) compared to non-GCB subtype patients; in subgroup analysis, patients diagnosed with GCB subtype had higher 3-years PFS and 3-years OS compared to non-GCB subtype both in R-CHOP group (P=0.030, P=0.041) and dose-intensive chemotherapy group (P=0.044, P=0.047), but not in auto-HSCT group (P=0.199, P=0.093). ⑥In the multivariate analysis, different molecular classification (GCB/non-GCB) was an independent predictor for PFS and OS both in R-CHOP group [HR=0.274 (95% CI 0.094-0.800), P=0.018; HR=0.408 (95% CI 0.164-1.015), P=0.045] and dose-intensive chemotherapy group [HR=0.423 (95% CI 0.043-1.152), P=0.048; HR=5.758 (95% CI 0.882-6.592), P=0.035]. However, there was no significant difference in PFS and OS for auto-HSCT group between GCB/non-GCB patients. Conclusion: Induction chemotherapy followed by up-front auto-HSCT has significant effect on efficacy for young and untreated patients with high risk DLBCL. Combined with induction chemotherapy followed by up-front auto-HSCT could improve the prognosis of non-GCB patients.
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Affiliation(s)
- X Wang
- Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin, Tianjin's Clinical Research Center for Cancer, Tianjin 300060, China
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Li MZ, Wang XX, Li ZL, Yi B, Liang C, He W. [Accuracy analysis of computer assisted navigation for condylectomy via intraoral approach]. Beijing Da Xue Xue Bao Yi Xue Ban 2019; 51:182-186. [PMID: 30773565 DOI: 10.19723/j.issn.1671-167x.2019.01.031] [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: 11/20/2022]
Abstract
OBJECTIVE To explore the application accuracy of virtual preoperative plan after the condylectomy via intraoral approach under computer assisted surgical navigation, and to analyze the location and cause of the surgical deviation to provide reference for the surgical procedure improvement in the future. METHODS In the study, 23 cases with condylar hypertrophy (11 with condylar osteochondroma and 12 with condylar benign hypertrophy) in Department of Oral and Maxilloficial Surgery, Peking University School and Hospital of Atomatology from December 2012 to December 2016 were treated by condylectomy via intraoral approach under computer assisted surgical navigation. The patient's spiral CT data were imported into ProPlan software before operation, and the affected mandibular ramus was reconstructed three-dimensionally. The condylar osteotomy line was designed according to the lesion range, and the preoperative design model was generated and introduced into the BrainLab navigation system. Under the guidance of computer navigation, the intraoral approach was used to complete the condylar resection according to the preoperative design of the osteotomy line. Cranial spiral CT of the craniofacial region was taken within one week after operation. three-dimensional reconstruction of the mandibular ramus at the condylectomy side was performed, and the condylar section was divided into six segments (anterolateral, anterior, anteromedial, posteromedial, posterior, and posterolateral) and the corresponding regional measurement points P1 to P6 were defined. Then the preoperative virtual model and the postoperative actual model were matched by Geomagic studio 12.0 to compare the differences and to analyze the accuracy of the operation. RESULTS All the patients had successfully accomplished the operation and obtained satisfactory results. Postoperative CT showed that the condyle lesion was completely resected, and the condylar osteotomy line was basically consistent with the surgical design. No tumor recurrence or temporomandibular joint ankylosis during the follow-up period. The postoperative accuracy analysis of the condylar resection showed that the confidence intervals measured by the six groups of P1 to P6 were (-2.26 mm, -1.89 mm), (-2.30 mm, -1.45 mm), (-3.37 mm, -2.91 mm), (-2.83 mm, -1.75 mm), (-1.13 mm, 0.99 mm), and(-1.17 mm, 0.17 mm), where P3 group was different from the other 5 groups. There was no significant difference between the P5 and P6 groups and the difference between the other four groups was statistically significant. CONCLUSION Under the guidance of computer navigation, the intraoral approach can be performed more accurately. The surgical deviation of each part of the osteotomy surface is mainly due to excessive resection. The anterior medial area of the anterior medial condyle represents the most excessive resection. The posterior and posterior lateral measurement points represent the posterior condylar area. The average deviation is not large, but the fluctuation of the deviation value is larger than that of the other four groups. The accuracy of computer-assisted subtotal resection has yet to be improved.
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Affiliation(s)
- M Z Li
- Department of Oral and Maxilloficial Surgery, Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China.,Department of Stomatology, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing 100045, China
| | - X X Wang
- Department of Oral and Maxilloficial Surgery, Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China
| | - Z L Li
- Department of Oral and Maxilloficial Surgery, Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China
| | - B Yi
- Department of Oral and Maxilloficial Surgery, Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China
| | - C Liang
- Department of Oral and Maxilloficial Surgery, Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China
| | - W He
- Department of Oral and Maxilloficial Surgery, Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China
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Zhang HP, Wang FR, Li MZ. Contrasting Bonding-Interaction-Induced Distinct Relaxation in La 65Ni 35 and La 65Al 35 Glass-Forming Alloys. J Phys Chem B 2019; 123:1149-1155. [PMID: 30624933 DOI: 10.1021/acs.jpcb.8b09188] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The α and β relaxations are two fundamental processes in glass-forming materials, and quite important for many of the properties. Although intensive studies have found that α and β relaxations can be tuned by changing the constituent elements, the underlying structural basis is still elusive. Here, we explored the effect of two key elements of Al and Ni on distinct β and α relaxations in La65Al35 and La65Ni35 glass-forming alloys via classical and ab initio molecular dynamics simulations combined with dynamical mechanical spectroscopy. Unexpected coupling of relaxation in both β and α relaxation time scales is observed for La and Al atoms in the La65Al35 system, which drastically suppresses the relaxation dynamics. It is revealed that the dynamic coupling of La and Al results from the covalent-like bonding interaction between Al atoms, which connect Al together, forming a network-like structure. The bonding network not only drastically slows down the dynamics of Al but also couples the motion of La and Al together. This finding elucidates the underlying basis of Al and Ni elements for distinct β and α relaxation and sheds light on tuning the formation and properties of metallic glasses by minor alloying.
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Affiliation(s)
- H P Zhang
- Department of Physics, Beijing Key Laboratory of Opto-Electronic Functional Materials & Micro-Nano Devices , Renmin University of China , Beijing 100872 , China
| | - F R Wang
- Department of Physics, Beijing Key Laboratory of Opto-Electronic Functional Materials & Micro-Nano Devices , Renmin University of China , Beijing 100872 , China
| | - M Z Li
- Department of Physics, Beijing Key Laboratory of Opto-Electronic Functional Materials & Micro-Nano Devices , Renmin University of China , Beijing 100872 , China
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25
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Yang DL, Gan ML, Tan Y, Ge GH, Li Q, Jiang YZ, Tang GQ, Li MZ, Wang JY, Li XW, Zhang SH, Zhu L. [MiR-222-3р Regulates the Proliferation and Differentiation of C2C12 Myoblasts by Targeting BTG2]. Mol Biol (Mosk) 2019; 53:44-52. [PMID: 30895952 DOI: 10.1134/s002689841901018x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [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] [Received: 01/21/2018] [Accepted: 05/08/2018] [Indexed: 06/09/2023]
Abstract
MiR-222-3р has been implicated in tumor cell proliferation and has an important role in the differentiation and maturation of myogenic cells. However, its role in skeletal myoblast proliferation is still unclear. In this study, we found that miR-222-3р expression increases initially and then decreases during C2C12 myoblast proliferation. Using synthetic miRNA mimics and inhibitors in gain- or loss-of-function experiments, we snowed that miR-222-3р overexpression in C2C12 cells promotes myoblast proliferation and represses myofiber formation, while miR-222-3р downregulation has the opposite effect. Using a prediction program, BTG2 was identified as a possible target gene of miR-222-3р. During myogenesis, miR-222-3р mimics repress BTG2 expression, while miR-222-3р inhibitors promote BTG2 expression. Using dual-luciferase reporter assay, we further demonstrated that miR-222-3р specifically targets BTG2. Additionally, we show that siRNA-mediated downregulation of BTG2 expression in C2C12 myoblasts promotes the proliferation and suppresses differentiation. In conclusion, we provide a novel insight into the mechanism by which miR-222-3р regulates the proliferation and differentiation of C2C12 myoblasts by targeting BTG2. This information contributes to our understanding of the role of miRNAs in skeletal muscle development.
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Affiliation(s)
- D L Yang
- Farm Animal Genetics Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, 611130 China
| | - M L Gan
- Farm Animal Genetics Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, 611130 China
| | - Y Tan
- Farm Animal Genetics Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, 611130 China
| | - G H Ge
- Farm Animal Genetics Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, 611130 China
| | - Q Li
- Sichuan Province General Station of Animal Husbandry, Chengdu, 611130 China
| | - Y Z Jiang
- College of Life and Science, Sichuan Agricultural University, Chengdu, 611130 China
| | - G Q Tang
- Farm Animal Genetics Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, 611130 China
| | - M Z Li
- Farm Animal Genetics Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, 611130 China
| | - J Y Wang
- Chongqing Academy of Animal Sciences, Chongqing, 402460 China
| | - X W Li
- Farm Animal Genetics Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, 611130 China
| | - S H Zhang
- Farm Animal Genetics Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, 611130 China
| | - L Zhu
- Farm Animal Genetics Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, 611130 China
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Zhao JJ, Zhang P, Li L, Chen SX, Joines A, Wu D, Wong M, Shahan J, Golden T, Wu N, Li MZ. Differential gene expression profile analysis in corticosterone-treated PC12 cells. Int J Clin Exp Pathol 2018; 11:3097-3103. [PMID: 31938437 PMCID: PMC6958082] [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: 01/18/2018] [Accepted: 02/22/2018] [Indexed: 06/10/2023]
Abstract
Major depressive disorder (MDD) is a highly prevalent psychiatric disorder that has been ranked as the 4th leading cause of disability worldwide. Past clinical and laboratory evidence has confirmed that abnormalities of the hypothalamic-pituitary-adrenal (HPA)-axis are involved in MDD development. In this study, we took advantage of corticosterone treatment of PC12 cells as a model to identify genes regulated by HPA-axis hormones. Next-generation RNA-Seq technology was utilized to explore genome-wide differentially expressed gene profiles between control and corticosterone treated PC12 cells. 1,274 genes with at least two-fold expression level change were identified. Gene ontology analysis showed that the top enriched biological processes included response to glucocorticoid signaling, apoptosis, cell division/DNA replication, and neuron projection/axon guidance, highly consistent with phenotypes of PC12 cells treated with corticosterone. Taken together, RNA-seq data is reliable and comprehensive, thus providing a valuable resource for understanding underlying mechanisms of glucocorticoid-induced neuron malfunction.
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Affiliation(s)
- Jing-Jie Zhao
- Department of Traditional Chinese Medicine, Beijing Friendship Hospital, Capital Medical UniversityBeijing, China
| | - Ping Zhang
- Department of Research and Development, Beijing Center for Physical and Chemical AnalysisBeijing, China
| | - Li Li
- Department of Traditional Chinese Medicine, Beijing Friendship Hospital, Capital Medical UniversityBeijing, China
| | - Shu-Xing Chen
- Department of Biological Sciences, Southeastern Oklahoma State UniversityDurant, OK 74701, USA
- School of Food and Bioengineering, Henan University of Science and TechnologyLuoyang 471023, Henan, China
| | - Allison Joines
- Department of Biological Sciences, Southeastern Oklahoma State UniversityDurant, OK 74701, USA
| | - Donald Wu
- Department of Biological Sciences, Southeastern Oklahoma State UniversityDurant, OK 74701, USA
| | - Megan Wong
- Department of Biological Sciences, Southeastern Oklahoma State UniversityDurant, OK 74701, USA
| | - Justin Shahan
- Department of Biological Sciences, Southeastern Oklahoma State UniversityDurant, OK 74701, USA
| | - Teresa Golden
- Department of Biological Sciences, Southeastern Oklahoma State UniversityDurant, OK 74701, USA
| | - Ning Wu
- Department of Biological Sciences, Southeastern Oklahoma State UniversityDurant, OK 74701, USA
| | - Ming-Zhen Li
- Shenzhen Ruipuxun Academy for Stem Cell & Regenerative MedicineShenzhen, China
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Abstract
The metallic glasses (MGs) are conjectured to be heterogeneous—their microscopic structures are embedded with localized, soft and loosely packed atomic regions, which are termed as flow units (FUs). Detailed knowledges on the structure and dynamical features of FUs are essential for understanding the plasticity of MGs. In our study, by performing dynamical tests on MGs in molecular dynamics simulations, we show that mechanical hysteretic loops are formed in the strain-stress curves due to the undergoing plastic events. By analyzing the activated times of each atom in different dynamical tests, we map the exact locations of FUs and the distribution of their activation probability in the initial structure of MGs. More importantly, we demonstrate that the FUs are indeed liquid-like according to the Lindemann criterion of melting.
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Affiliation(s)
- S T Liu
- Department of Mechanics and Engineering Science, LTCS, and CAPT, College of Engineering, Peking University, Beijing, 100871, China. .,Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China.
| | - F X Li
- Department of Physics, Beijing Key Laboratory of Opto-electronic Functional Materials & Micro-nano Devices, Renmin University of China, Beijing, 100872, China
| | - M Z Li
- Department of Physics, Beijing Key Laboratory of Opto-electronic Functional Materials & Micro-nano Devices, Renmin University of China, Beijing, 100872, China.
| | - W H Wang
- Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
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Abstract
The prediction of the glass-forming ability (GFA) by varying the composition of alloys is a challenging problem in glass physics, as well as a problem for industry, with enormous financial ramifications. Although different empirical guides for the prediction of GFA were established over decades, a comprehensive model or approach that is able to deal with as many variables as possible simultaneously for efficiently predicting good glass formers is still highly desirable. Here, by applying the support vector classification method, we develop models for predicting the GFA of binary metallic alloys from random compositions. The effect of different input descriptors on GFA were evaluated, and the best prediction model was selected, which shows that the information related to liquidus temperatures plays a key role in the GFA of alloys. On the basis of this model, good glass formers can be predicted with high efficiency. The prediction efficiency can be further enhanced by improving larger database and refined input descriptor selection. Our findings suggest that machine learning is very powerful and efficient and has great potential for discovering new metallic glasses with good GFA.
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Affiliation(s)
- Y T Sun
- Institute of Physics, Chinese Academy of Sciences , Beijing 100190, People's Republic of China
- University of Chinese Academy of Science , Beijing 100049, People's Republic of China
| | - H Y Bai
- Institute of Physics, Chinese Academy of Sciences , Beijing 100190, People's Republic of China
- University of Chinese Academy of Science , Beijing 100049, People's Republic of China
| | - M Z Li
- Department of Physics, Beijing Key Laboratory of Optoelectronic Functional Materials & Micro-nano Devices, Renmin University of China , Beijing 100872, People's Republic of China
| | - W H Wang
- Institute of Physics, Chinese Academy of Sciences , Beijing 100190, People's Republic of China
- University of Chinese Academy of Science , Beijing 100049, People's Republic of China
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Liu Y, Guo GL, Ouyang WB, Li MZ, Pan XB. [Feasibility and effectiveness of percutaneous ventricular septal defect closure under solely guidance of echocardiography]. Zhonghua Yi Xue Za Zhi 2017; 97:1222-1226. [PMID: 28441849 DOI: 10.3760/cma.j.issn.0376-2491.2017.16.008] [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] [Indexed: 11/05/2022]
Abstract
Objective: To compare the efficacy and safety of percutaneous ventricular septal defect (VSD) closure under solely guidance of echocardiography and fluoroscopy. Methods: The retrospective study was conducted at Fuwai Hospital, between February 2014 and February 2015. The patients were divided into two groups. VSD closure was conducted in 42 patients under solely guidance of echocardiography, and 100 patients who were treated with percutaneous catheter closure under fluoroscopy guidance were selected as a control group. The baseline characteristics, procedural time and complications were recorded and assessed. Results: There were no significant differences in terms of age, gender and pre-operative echocardiographic characteristics (all P>0.05). Percutaneous VSD closure under traditional fluoroscopy guidance was successful in 95 patients (95%). The procedural time was (54.7±12.5) minutes. The symmetrical occluders diameter was (6.9±1.8) mm. Four patients had postoperative residual shunt, one patient developed left bundle branch block, and 6 patients developed new tricuspid regurgitation. Percutaneous VSD closure under only transthoracic echocardiography (TTE) guidance was successful in 39 patients (93%). Because of delivery catheter passage failure through the defect, one case required conversion to perventricular closure via a small transthoracic incision under transesophageal echocardiography (TEE) guidance. The other two cases underwent surgical repair because of residual shunt with more than 2 mm after closure. The procedural time was (40.3±13.2) minutes. The symmetrical occluders diameter was (6.5±1.2) mm. Four patients had postoperative residual shunt that disappeared after 1 month follow-up, and one patient developed right bundle branch block which disappeared 3 days later. During (9.3±3.6) months follow-up, there were no other complications, such as pericardial effusion, occluder malposition, atrioventricular block, aortic valve regurgitation, and aggravating tricuspid regurgitation in each group. However, the total operation time, diameter of VSD occluder, total mild complications, and the equipment cost in the study group were less than that in the control group (P<0.05). Conclusion: Percutaneous VSD closure can be successfully performed under sole guidance of echocardiography with outcomes similar to those achieved with fluoroscopy guidance.
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Affiliation(s)
- Y Liu
- Department of Cardiac Surgery, Fuwai Hospital, Chinese Academy of Medical Sciences, Beijing 100037, China
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Liu Y, Hu HB, Li MZ. [Percutaneous balloon mitral valvuloplasty in a pregnant woman under echocardiographic guidance]. Zhonghua Xin Xue Guan Bing Za Zhi 2017; 45:329-330. [PMID: 28545286 DOI: 10.3760/cma.j.issn.0253-3758.2017.04.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Zhang M, Wang YM, Li FX, Jiang SQ, Li MZ, Liu L. Mechanical Relaxation-to-Rejuvenation Transition in a Zr-based Bulk Metallic Glass. Sci Rep 2017; 7:625. [PMID: 28377604 PMCID: PMC5429611 DOI: 10.1038/s41598-017-00768-7] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [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: 01/20/2017] [Accepted: 03/13/2017] [Indexed: 11/19/2022] Open
Abstract
The relaxation of amorphous materials, i.e., aging, would largely endanger their performances in service. Here we report a mechanical relaxation-to-rejuvenation transition of a Zr35Ti30Be27.5Cu7.5 bulk metallic glass (BMG) in elastostatic compression at ambient temperature, thus provide an accessible way to tailor the mechanical properties of amorphous materials. To unravel the structural evolution underlying the observed transition, atomistic simulations parallel with the experimental tests on a typical model glass system Zr60Cu40 were performed, which successfully reproduced and thus upheld the experimentally observed mechanical relaxation-to-rejuvenation transition. The variations of coordination number and atomic volume during the transition are evaluated to indicate a de-mixing tendency of the constituent atoms in the rejuvenation stage. This de-mixing tendency largely explains the difference between mechanical rejuvenation and thermal rejuvenation and reveals a competitive relationship between activation enthalpy and activation entropy in the stress-driven temperature-assisted atomic dynamics of BMG, such as diffusion and plastic deformation etc.
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Affiliation(s)
- M Zhang
- School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China
- State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences, Beijing, 100190, China
| | - Y M Wang
- School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - F X Li
- Department of Physics, Beijing Key Laboratory of Opto-electronic Functional Materials & Micro-nano Devices, Renmin University of China, Beijing, 100872, China
| | - S Q Jiang
- Department of Physics, Beijing Key Laboratory of Opto-electronic Functional Materials & Micro-nano Devices, Renmin University of China, Beijing, 100872, China
| | - M Z Li
- Department of Physics, Beijing Key Laboratory of Opto-electronic Functional Materials & Micro-nano Devices, Renmin University of China, Beijing, 100872, China
| | - L Liu
- School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China.
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Zhang YD, Qu H, Du YF, Xie DH, Li MZ, Shen J. [Clinical possibility of low ligation of inferior mesenteric artery and lymph nodes dissection in laparoscopic low anterior resection]. Zhonghua Yi Xue Za Zhi 2017; 96:1916-8. [PMID: 27373360 DOI: 10.3760/cma.j.issn.0376-2491.2016.24.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
OBJECTIVE To investigate the clinical possibility of low ligation of inferior mesenteric artery (IMA) and lymph nodes dissection in laparoscopic low anterior resection. METHODS Data was collected retrospectively from 216 patients who underwent laparoscopic low anterior resection in our hospital from June 2011 to January 2015.Patients were divided into control group (132 cases) and observation group (84 cases). The observation group was treated with low ligation of IMA and lymph nodes dissection, and the control group was cured by high ligation of IMA and lymph nodes dissection. We analyzed the operation time, the number of lymph nodes dissection, the number of lymph nodes removed around the root of IMA, the rate of lymph node metastasis around the root of IMA, the incidence of anastomotic leakage and the ventilation time after the operation. RESULTS There was no significant difference between the two group in the pre-operative data, operation time, the number of lymph nodes dissection the number of lymph nodes removed around the root of IMA, the rate of lymph node metastasis around the root of IMA and the incidence of anastomotic leakage (P>0.05). The observation group were significantly better than the control group the in the ventilation time after the operation (P<0.05). The follow up time was 12 to 67 months. The median follow up time was 37 months. One patient in observation group died of cardiovascular disease. One patient in control group died of metastatic carcinoma. CONCLUSION Detection of low ligation of inferior mesenteric artery and lymph nodes dissection in laparoscopic low anterior resection is safe and practicable, which should be widely applied.
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Affiliation(s)
- Y D Zhang
- Department of General Surgery, Beijing Chaoyang Hospital, Capital Medical University, Beijing 100020, China
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Sun YT, Wang JQ, Li YZ, Bai HY, Li MZ, Wang WH. Effects of atomic interaction stiffness on low-temperature relaxation of amorphous solids. Phys Chem Chem Phys 2016; 18:26643-26650. [PMID: 27711442 DOI: 10.1039/c6cp04238d] [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: 11/21/2022]
Abstract
While low-temperature relaxations show significant differences among metallic glasses with different compositions, the underlying mechanism remains mysterious. Using molecular dynamics simulation, low-temperature relaxation of amorphous solids is investigated in model systems with different atomic interaction stiffness. It was found that as the interaction stiffness increases, the low-temperature relaxation is enhanced. The fraction of mobile atoms increases with increasing interaction stiffness, while the length scale of dynamical heterogeneity does not change. The enhanced relaxation may be due to increased dynamical heterogeneity. These findings provide a physical picture for better understanding the origin of low-temperature relaxation dynamics in amorphous solids, and the experimentally observed different β-relaxation behaviors in various metallic glasses.
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Affiliation(s)
- Y T Sun
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190, P. R. China.
| | - J Q Wang
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190, P. R. China. and Key Laboratory of Magnetic Materials and Devices and Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology, Ningbo Institute of Industrial Technology, Chinese Academy of Sciences, Zhejiang 315201, P. R. China
| | - Y Z Li
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190, P. R. China.
| | - H Y Bai
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190, P. R. China.
| | - M Z Li
- Department of Physics, Beijing Key Laboratory of Opto-electronic Functional Materials & Micro-nano Devices, Renmin University of China, Beijing 100872, P. R. China.
| | - W H Wang
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190, P. R. China.
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Abstract
DNA methylation is an important component of the epigenetic machinery and plays a critical role in transcriptional regulation. It mostly occurs in CpG abundant regions, known as CpG islands (CGIs). G protein-coupled receptor 120 (GPR120) functions as an omega-3 fatty acid receptor and is involved in multiple-biological processes, including lipogenesis. Herein, we show that GPR120 is highly expressed in porcine mature adipose tissue and is positively associated with adipose tissue development (r = 0.86, P < 0.01). We also predicted 5 CGIs across the GPR120 genomic sequence and investigated their methylation status using the MassArray approach. Our results show that these CGIs exhibit significantly different methylation states (P(CGI) < 0.01), and that the DNA methylation of GPR120 5ꞌ-untranslated and first exon regions can negatively regulate its expression levels. This study will aid further investigations on the epigenetic mechanism regulating GPR120 expression.
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Affiliation(s)
- H M Wang
- Institute of Animal Genetics and Breeding, College of Animal Science and Technology, Sichuan Agricultural University, Ya'an, Sichuan, China
| | - J D Ma
- Institute of Animal Genetics and Breeding, College of Animal Science and Technology, Sichuan Agricultural University, Ya'an, Sichuan, China
| | - L Jin
- Institute of Animal Genetics and Breeding, College of Animal Science and Technology, Sichuan Agricultural University, Ya'an, Sichuan, China
| | - Y H Liu
- Institute of Animal Genetics and Breeding, College of Animal Science and Technology, Sichuan Agricultural University, Ya'an, Sichuan, China
| | - T D Che
- Institute of Animal Genetics and Breeding, College of Animal Science and Technology, Sichuan Agricultural University, Ya'an, Sichuan, China
| | - M Z Li
- Institute of Animal Genetics and Breeding, College of Animal Science and Technology, Sichuan Agricultural University, Ya'an, Sichuan, China
| | - X W Li
- Institute of Animal Genetics and Breeding, College of Animal Science and Technology, Sichuan Agricultural University, Ya'an, Sichuan, China
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Shen LY, Luo J, Lei HG, Jiang YZ, Bai L, Li MZ, Tang GQ, Li XW, Zhang SH, Zhu L. Effects of muscle fiber type on glycolytic potential and meat quality traits in different Tibetan pig muscles and their association with glycolysis-related gene expression. Genet Mol Res 2015; 14:14366-78. [PMID: 26600496 DOI: 10.4238/2015.november.13.22] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
The myosin heavy chain (MyHC) composition, glycolytic potential, mitochondrial content, and gene expression related to energy metabolism were analyzed in eight muscles from Tibetan pigs, to study how meat quality develops in different muscle tissues. The muscles were classified into three clusters, based on MyHC composition: masseter, trapezius, and latissimus dorsi as 'slow-oxidative-type'; psoas major and semimembranosus as 'intermediate-type'; and longissimus dorsi, obliquus externus abdominis, and semitendinosus as 'fast-glycolytic-type'. The 'slow-oxidative-type' muscles had the highest MyHC I and MyHC IIA content (P < 0.01); 'intermediate-type' muscles, the highest MyHC IIx content (P < 0.01); and 'fast-glycolytic-type' muscles, the highest MyHC IIb content (P < 0.01). The pH values measured in 'slow-oxidative-type' muscles were higher than those in the other clusters were; however, the color of 'fast-glycolytic-type' muscles was palest (P < 0.01). Mitochondrial content increased in the order: fast-glycolytic-type < intermediate-type < slow-oxidative-type. In the 'slow-oxidative-type' muscles, the expression levels of genes related to ATP synthesis were higher, but were lower for those related to glycogen synthesis and glycolysis. Mitochondrial content was significantly positively correlated with MyHC I content, but negatively correlated with MyHC IIb content. MyHC I and mitochondrial content were both negatively correlated with glycolytic potential. Overall, muscles used frequently in exercise had a higher proportion of type I fibers. 'Slow-oxidative-type' muscles, rich in type I fibers with higher mitochondrial and lower glycogen and glucose contents, had a higher ATP synthesis efficiency and lower glycolytic capacity, which contributed to their superior meat quality.
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Affiliation(s)
- L Y Shen
- College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, China
| | - J Luo
- College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, China
| | - H G Lei
- College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, China
| | - Y Z Jiang
- College of Life Science, Sichuan Agricultural University, Chengdu, China
| | - L Bai
- College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, China
| | - M Z Li
- College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, China
| | - G Q Tang
- College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, China
| | - X W Li
- College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, China
| | - S H Zhang
- College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, China
| | - L Zhu
- College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, China
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Yu GC, Tang QZ, Long KR, Che TD, Li MZ, Shuai SR. Effectiveness of microsatellite and single nucleotide polymorphism markers for parentage analysis in European domestic pigs. Genet Mol Res 2015; 14:1362-70. [PMID: 25730075 DOI: 10.4238/2015.february.13.15] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Parentage analysis and individual identification are recent, promising methods that have been applied to evolutionary and ecological studies, as well as conservation management. Parental exclusion relying on polymorphic microsatellites has been used worldwide in parentage determination, while the low mutation rate and genotyping error rate of single nucleotide polymorphisms (SNPs) make them another important marker for pedigree tracing. Here, we compared the effectiveness of microsatellites and SNP markers in European pigs. We also measured and presented the minimum and optimal criteria for SNP markers to be used in paternity and identity analysis. Our findings may contribute to the development of techniques for future molecular evolution and conservation studies, as well as breeding programs.
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Affiliation(s)
- G C Yu
- Institute of Animal Genetics & Breeding, College of Animal Science & Technology, Sichuan Agricultural University, Ya'an, China
| | - Q Z Tang
- Institute of Animal Genetics & Breeding, College of Animal Science & Technology, Sichuan Agricultural University, Ya'an, China
| | - K R Long
- Institute of Animal Genetics & Breeding, College of Animal Science & Technology, Sichuan Agricultural University, Ya'an, China
| | - T D Che
- Institute of Animal Genetics & Breeding, College of Animal Science & Technology, Sichuan Agricultural University, Ya'an, China
| | - M Z Li
- Institute of Animal Genetics & Breeding, College of Animal Science & Technology, Sichuan Agricultural University, Ya'an, China
| | - S R Shuai
- Institute of Animal Genetics & Breeding, College of Animal Science & Technology, Sichuan Agricultural University, Ya'an, China
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Wang FJ, Jin L, Guo YQ, Liu R, He MN, Li MZ, Li XW. Development-related expression patterns of protein-coding and miRNA genes involved in porcine muscle growth. Genet Mol Res 2014; 13:9921-30. [PMID: 25501203 DOI: 10.4238/2014.november.27.21] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Muscle growth and development is associated with remarkable changes in protein-coding and microRNA (miRNA) gene expression. To determine the expression patterns of genes and miRNAs related to muscle growth and development, we measured the expression levels of 25 protein-coding and 16 miRNA genes in skeletal and cardiac muscles throughout 5 developmental stages by quantitative reverse transcription-polymerase chain reaction. The Short Time-Series Expression Miner (STEM) software clustering results showed that growth-related genes were downregulated at all developmental stages in both the psoas major and longissimus dorsi muscles, indicating their involvement in early developmental stages. Furthermore, genes related to muscle atrophy, such as forkhead box 1 and muscle ring finger, showed unregulated expression with increasing age, suggesting a decrease in protein synthesis during the later stages of skeletal muscle development. We found that development of the cardiac muscle was a complex process in which growth-related genes were highly expressed during embryonic development, but they did not show uniform postnatal expression patterns. Moreover, the expression level of miR-499, which enhances the expression of the β-myosin heavy chain, was significantly different in the psoas major and longissimus dorsi muscles, suggesting the involvement of miR-499 in the determination of skeletal muscle fiber types. We also performed correlation analyses of messenger RNA and miRNA expression. We found negative relationships between miR-486 and forkhead box 1, and miR-133a and serum response factor at all developmental stages, suggesting that forkhead box 1 and serum response factor are potential targets of miR-486 and miR-133a, respectively.
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Affiliation(s)
- F J Wang
- Institute of Animal Genetics and Breeding, College of Animal Science and Technology, Sichuan Agricultural University, Ya'an, Sichuan, China
| | - L Jin
- Institute of Animal Genetics and Breeding, College of Animal Science and Technology, Sichuan Agricultural University, Ya'an, Sichuan, China
| | - Y Q Guo
- Institute of Animal Genetics and Breeding, College of Animal Science and Technology, Sichuan Agricultural University, Ya'an, Sichuan, China
| | - R Liu
- Institute of Animal Genetics and Breeding, College of Animal Science and Technology, Sichuan Agricultural University, Ya'an, Sichuan, China
| | - M N He
- Institute of Animal Genetics and Breeding, College of Animal Science and Technology, Sichuan Agricultural University, Ya'an, Sichuan, China
| | - M Z Li
- Institute of Animal Genetics and Breeding, College of Animal Science and Technology, Sichuan Agricultural University, Ya'an, Sichuan, China
| | - X W Li
- Institute of Animal Genetics and Breeding, College of Animal Science and Technology, Sichuan Agricultural University, Ya'an, Sichuan, China
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Shang BS, Li MZ, Yao YG, Lu YJ, Wang WH. Evolution of atomic rearrangements in deformation in metallic glasses. Phys Rev E Stat Nonlin Soft Matter Phys 2014; 90:042303. [PMID: 25375490 DOI: 10.1103/physreve.90.042303] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2014] [Indexed: 06/04/2023]
Abstract
Atomic rearrangements induced by shear stress are fundamental for understanding deformation mechanisms in metallic glasses (MGs). Using molecular dynamic simulation, the atomic rearrangements characterized by nonaffine displacements (NADs) and their spatial distribution and evolution with tensile stress in Cu50Zr50 MG were investigated. It was found that in the elastic regime the atomic rearrangements with the largest NADs are relatively homogeneous in space, but exhibit strong spatial correlation, become localized and inhomogeneous, and form large clusters as strain increases, which may facilitate the so-called shear transformation zones. Furthermore, initially they prefer to take place around Cu atoms which have more nonicosahedral configurations. As strain increases, the preference decays and disappears in the plastic regime. The atomic rearrangements with the smallest NADs are preferentially located around Cu atoms, too, but with more icosahedral or icosahedral-like atomic configurations. The preference is maintained in the whole deformation process. In contrast, the atomic rearrangements with moderate NADs distribute homogeneously, and do not show explicit preference or spatial correlation, acting as matrix during deformation. Among the atomic rearrangements with different NADs, those with largest and smallest NADs are nearest neighbors initially, but separating with increasing strain, while those with largest and moderate NADs always avoid to each other. The correlations in the fluctuations of the NADs confirm the long-range strain correlation and the scale-free characteristic of NADs in both elastic and plastic deformation, which suggests a universality of the scaling in the plastic flow in MGs.
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Affiliation(s)
- B S Shang
- State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China
| | - M Z Li
- Department of Physics, Renmin University of China, Beijing 100872, China
| | - Y G Yao
- School of Physics, Beijing Institute of Technology, Beijing 100081, China
| | - Y J Lu
- School of Physics, Beijing Institute of Technology, Beijing 100081, China
| | - W H Wang
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
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39
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Zhao ZJ, Wei WT, Li MZ, Cao J. [Body mass, energy budget and leptin of mice under stochastic food restriction and refeeding]. Dongwuxue Yanjiu 2013; 34:574-581. [PMID: 24415689] [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: 06/03/2023]
Abstract
Periods of restricted food intake that lead to lower body weight are often followed by rapid regaining of the lost weight after ad libitum refeeding, an event generally known as the "compensatory growth". To explore the physiological mechanisms underlying "compensatory growth", we evaluated a series of energetic parameters (energy intake, energy expenditure, body composition and serum leptin levels) of adult KM mice subjected to three cycles of stochastic food restriction following by ad libitum refeeding (SFR-Re). The results indicated that animals lost their body mass after stochastic food restriction and then regained to the control level after refeeding. After the final cycle, SFR-Re mice showed higher basal metabolic rate, lower nonshivering thermogenesis, and their cytochrome c oxydase activities, as well as uncoupling protein 1(UCP1) contents of brown adipose tissue all decreased compared with controls. Meanwhile, higher energy intake and digestibility, as well as heavier fat pads also were found in SFR-Re mice. But, serum leptin levels showed no difference between SFR-Re and control mice. On the whole, these findings indicated that when food is resourceful, SFR-Re mice are under rapid "compensatory growth" by increasing their food intake and energy storage efficiency, meanwhile, decreasing energy consumption in thermogenesis. Moreover, leptin may be a possible player in the regulations of energy budget and thermogenesis during "compensatory growth".
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Affiliation(s)
- Zhi-Jun Zhao
- School of Agricultural Science, Liaocheng University, Liaocheng 252059, China.
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40
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Wu ZW, Li MZ, Wang WH, Song WJ, Liu KX. Effect of local structures on structural evolution during crystallization in undercooled metallic glass-forming liquids. J Chem Phys 2013; 138:074502. [PMID: 23445019 DOI: 10.1063/1.4792067] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Z W Wu
- State Key Laboratory of Turbulence and Complex System & Center for Applied Physics and Technology, College of Engineering, Peking University, Beijing 100871, China
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41
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Jiang YZ, Zhu L, Tang GQ, Li MZ, Jiang AA, Cen WM, Xing SH, Chen JN, Wen AX, He T, Wang Q, Zhu GX, Xie M, Li XW. Carcass and meat quality traits of four commercial pig crossbreeds in China. Genet Mol Res 2012; 11:4447-55. [PMID: 23079983 DOI: 10.4238/2012.september.19.6] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
We evaluated carcass and meat quality traits of two Chinese native crossbreeds Landrace x Meishan (LM) and Duroc x (Landrace x Meishan) (DLM) and two foreign crossbreeds Duroc x (Landrace x Yorkshire) (DLY) and PIC (an imported five-way crossbreed). One hundred and twenty weaned pigs (half castrated males and half females) were reared and slaughtered at a predestinated slaughter age. The general carcass and meat quality traits were measured and analyzed. The DLY and PIC crosses had significantly heavier live weights (93.39 and 96.33 kg, P < 0.01), significantly higher dressing percentages (80.65 and 79.39%, P < 0.05), significantly bigger loin areas (42.69 and 43.91 cm(2), P < 0.001), and significantly more lean carcasses (65.78 and 66.40%, P < 0.001) than LM and DLM. On the other hand, LM had a significantly lower live weight (70.29 kg, P < 0.01), significantly thicker back fat (3.54 cm, P < 0.001), significantly less lean carcasses (46.82%, P < 0.001), and significantly less ham and breech (26.53%, P < 0.05) than the other crossbreeds. Among meat quality parameters, LM had the highest intramuscular fat content (5.02%, P < 0.001) and the smallest fiber area (3126.45 μm(2), P < 0.01). However, PIC showed the lowest pH(1) (5.82, P < 0.01) and pH(2) (5.63, P < 0.01), the highest drip loss (2.89%, P < 0.01), and the lowest intramuscular fat (1.35%, P < 0.001). We concluded that LM and DLM had good meat quality traits but poorer carcass traits than DLY and PIC; DLY had good carcass and meat quality traits; PIC had good carcass traits, but it had less intramuscular fat, lower pH and higher drip loss.
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Affiliation(s)
- Y Z Jiang
- College of Life and Science, Sichuan Agricultural University, Yaan, P.R. China.
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Abstract
DNA methylation may be involved in regulating the expression of protein-coding genes, resulting in different fat and muscle phenotypes. Using a methylation-sensitive amplified polymorphism approach, we obtained 7423 bands by selective amplification of genomic DNA from six different fat depots and two heterogeneous muscle types from Duroc/Landrace/Yorkshire cross-bred pigs. The degrees of DNA methylation, determined by the percentages of hemi- and fully methylated sites relative to the total number of CCGG sites, were similar in male and female pigs for each specific tissue [χ(2) test; P (two-tailed) > 0.05]. Gender bias was therefore ignored. There were significant differences in the degree of DNA methylation among the eight tissue types [χ(2) test; P(total) (two-tailed) = 0.009]. However, similar degrees of methylation were observed among the six fat depots [χ(2) test; P(fat) (two-tailed) = 0.24 > 0.05]and between the two muscle types [χ(2) test; P(muscle) (two-tailed) = 0.76 > 0.05]. We conclude that the degree of DNA methylation differs between porcine fat and muscle tissue, but that the methylation status of a particular tissue type is similar, despite being deposited at different body sites.
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Affiliation(s)
- J D Ma
- Institute of Animal Genetics and Breeding, College of Animal Science and Technology, Sichuan Agricultural University, Ya'an, Sichuan, P.R. China
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Abstract
Malate dehydrogenases 1 and 2 (MDH1 and MDH2), and malic enzyme 1 (ME1) play important roles in the Krebs cycle for energy metabolism. The mRNA abundance changes of MDH1, MDH2 and ME1 genes were measured across six different adipose tissues from the leaner Landrace and fatty Rongchang pig breeds using quantitative real-time PCR. The mRNA of MDH1, MDH2 and ME1 was more abundant in fatty Rongchang pigs than in leaner Landrace pigs. In both breeds, females exhibited higher adipocyte volume and mRNA abundance of MDH1, MDH2 and ME1 compared with males. These values were higher in the subcutaneous adipose tissue compared with visceral adipose tissue. Furthermore, mRNA abundance changes of MDH1, MDH2 and ME1 have the remarked significant positive correlation with adipocyte volume across the six adipose tissue types. We conclude that there are breed-, gender- and tissue-specific expression patterns of ME1, MDH1 and MDH2, which highlight their potential as candidate genes for selecting for fat volume in pigs.
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Affiliation(s)
- S L Zhou
- Institute of Animal Genetics and Breeding, College of Animal Science and Technology, Sichuan Agricultural University, Sichuan, China
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Huang L, Wang CZ, Li MZ, Ho KM. Coverage-dependent collective diffusion of a dense Pb wetting layer on Si(111). Phys Rev Lett 2012; 108:026101. [PMID: 22324698 DOI: 10.1103/physrevlett.108.026101] [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: 08/14/2011] [Indexed: 05/31/2023]
Abstract
The dynamics of a dense Pb wetting layer on the Si(111) surface is studied in the framework of a generalized Frenkel-Kontorova model. Instead of the typical diffusion by random hopping processes, a liquidlike collective motion of the Pb atoms within the dense wetting layer is revealed to give rise to ultrafast kinetics of the wetting layer even at low temperatures. A kinetic Monte Carlo simulation including this collective spreading mechanism of the dense wetting layer quantitatively reproduces the experimental observations.
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Affiliation(s)
- Li Huang
- Ames Laboratory, US-DOE, Department of Physics, Iowa State University, Ames, Iowa 50011, USA
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45
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Gu YR, Li MZ, Zhang K, Chen L, Jiang AA, Wang JY, Li XW. Evaluation of endogenous control genes for gene expression studies across multiple tissues and in the specific sets of fat- and muscle-type samples of the pig. J Anim Breed Genet 2011; 128:319-25. [PMID: 21749479 DOI: 10.1111/j.1439-0388.2011.00920.x] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
To normalize a set of quantitative real-time PCR (q-PCR) data, it is essential to determine an optimal number/set of housekeeping genes, as the abundance of housekeeping genes can vary across tissues or cells during different developmental stages, or even under certain environmental conditions. In this study, of the 20 commonly used endogenous control genes, 13, 18 and 17 genes exhibited credible stability in 56 different tissues, 10 types of adipose tissue and five types of muscle tissue, respectively. Our analysis clearly showed that three optimal housekeeping genes are adequate for an accurate normalization, which correlated well with the theoretical optimal number (r ≥ 0.94). In terms of economical and experimental feasibility, we recommend the use of the three most stable housekeeping genes for calculating the normalization factor. Based on our results, the three most stable housekeeping genes in all analysed samples (TOP2B, HSPCB and YWHAZ) are recommended for accurate normalization of q-PCR data. We also suggest that two different sets of housekeeping genes are appropriate for 10 types of adipose tissue (the HSPCB, ALDOA and GAPDH genes) and five types of muscle tissue (the TOP2B, HSPCB and YWHAZ genes), respectively. Our report will serve as a valuable reference for other studies aimed at measuring tissue-specific mRNA abundance in porcine samples.
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Affiliation(s)
- Y R Gu
- Institute of Animal Genetics and Breeding, College of Animal Science and Technology, Sichuan Agricultural University, Ya'an, Sichuan, China
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Abstract
The structure feature of a model CuZr metallic glass during deformation is investigated by molecular dynamics simulations. A spatially heterogeneous irreversible rearrangement is observed in terms of nonaffine displacement. We find that regions with smaller nonaffine displacement have more Voronoi pentagons, while in those with larger nonaffine displacement other types of faces are more populated. We use the degree of local fivefold symmetry (LFFS) as the structural indicator to predict plastic deformation of local structures and find that the plastic events prefer to be initiated in regions with a lower degree of LFFS and propagate toward regions with a higher degree of LFFS.
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Affiliation(s)
- H L Peng
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190 China
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Lu FE, Li MZ, Ye WY. [Study of the therapeutic principle of scavenging evil-heat and removing toxin]. Zhongguo Zhong Xi Yi Jie He Za Zhi 2004; 24:1124-9. [PMID: 15658662] [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: 05/01/2023]
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Bernstein E, Kim SY, Carmell MA, Murchison EP, Alcorn H, Li MZ, Mills AA, Elledge SJ, Anderson KV, Hannon GJ. Erratum: Dicer is essential for mouse development. Nat Genet 2003. [DOI: 10.1038/ng1103-287b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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49
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Li MZ, Masuko S. Target specific organization and neuron types of the dog pelvic ganglia: a retrograde-tracing and immunohistochemical study. Arch Histol Cytol 2001; 64:267-80. [PMID: 11575423 DOI: 10.1679/aohc.64.267] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The major pelvic ganglion in both the rat and guinea pig has been extensively studied because of its anatomical simplicity. To clarify the target specific neural pathway in the diffusely distributed pelvic ganglia of larger animals, the pelvic plexus of the female dog was investigated by retrograde tracing and immunohistochemistry. The whole mount staining of the pelvic plexus with acetylcholinesterase histochemistry revealed 70-100 ganglia of varying sizes. Neurons retrogradely labeled from the rectum were mainly found in ganglia located in the dorso-caudal part of the plexus. The majority of these were non-catecholaminergic, immunoreactive for either calbindin (Calb) or neuropeptide Y (NPY), and characteristically associated with baskets of enkephalin (ENK)-immunoreactive varicose fibers. Neurons projecting to the utero-vaginal walls were distributed in ganglia located in the ventro-caudal part of the plexus. These mainly consisted of two major neuron groups: catecholaminergic Calb-immunoreactive neurons, and non-catecholaminergic neurons containing nitric oxide synthase (NOS) and/or vasoactive intestinal peptide (VIP), which were preferentially associated with a network of ENK-immunoreactive varicose fibers. Neurons retrogradely labeled from the urinary bladder mainly occurred in ganglia located around the junction between the ureter and the bladder. These consisted of catecholaminergic Calb neurons and noncatecholaminergic neurons containing Calb or NOS. Only a few ENK-immunoreactive fibers were found within the clusters of catecholaminergic neurons. These results indicate that organ specific neurons are located in separate ganglia and have both a distinctive composition of neuron types as well as different innervation by preganglionic fibers.
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Affiliation(s)
- M Z Li
- Department of Anatomy, Saga Medical School, Japan.
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50
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Wang YM, Pei JM, Zhu MZ, Zang YM, Li MZ, Nui GB, Shi F. [The vasodilation and its mechanism of C-type natriuretic peptide]. Zhongguo Ying Yong Sheng Li Xue Za Zhi 2001; 17:174-177. [PMID: 21171413] [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] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
AIM AND METHODS With routine blood vessel perfusion in vitro, the vasodilation and its mechanism of C-type natriuretic peptide, a new member of natriuretic peptide family were observed in rabbits. RESULTS CNP had the dose-dependent vasodilation effects on abdominal artery and celiac vein at the range of 10(-10)-10(-6) mol/L, its action on vein was just like nitroglycerin, its action on artery was weaker than that of ANP. Atropine (10(-7) mol/L), Regitine (20 microg), and indomethacin (20 microg) had nothing effect on the vasodilation of CNP on abdominal artery. But glibenclamide (10(-6) mol/L) and propranolol (10(-6) mol/L) could decrease the vasodilation of CNP obviously, in addition, CNP couldn't inhibit the vasoconstriction of NE. CONCLUSION (1) CNP might be kind of venous systemic vasodilator, and it was also a arterial selective peptide controlling the vessel tone. (2) CNP dilated the vessel at least through two ways: (a) ATP-sensitive K+ channel, (b) beta-receptor.
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Affiliation(s)
- Y M Wang
- Department of Physioligy, Fourth Military Medical University, Xi'an 710032, China
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