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Ye C, Chen QY, Ma XQ, Lv P, Yang HL, Tian D, Zhao ZL, Lin JQ, Cui N, Li HL, Qin H. [Long-term outcomes of 328 patients with of autism spectrum disorder after fecal microbiota transplantation]. Zhonghua Wei Chang Wai Ke Za Zhi 2022; 25:798-803. [PMID: 36117371 DOI: 10.3760/cma.j.cn441530-20220601-00238] [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: 06/15/2023]
Abstract
Objective: To evaluate the efficacy and safety of fecal microbiota transplantation (FMT) in the treatment of autism spectrum disorder (ASD). Methods: A longitudinal study was conducted. Clinical data from ASD patients with gastrointestinal symptoms and who underwent FMT in the Tenth People's Hospital affiliated to Tongji University or Jinling Hospital between May 2012 to May 2021 were retrospectively collected. Scores derived from the autism behavior checklist (ABC), the childhood autism rating scale (CARS), the Bristol stool form scale (BSFS), and the gastrointestinal symptom rating scale (GSRS) were analyzed at baseline and at the 1st, 3rd, 6th, 12th, 24th, 36th, 48th and 60th month after FMT. Records of any adverse reactions were collected. Generalized estimating equations were used for analysis of data on time points before and after FMT. Results: A total of 328 patients met the inclusion criteria for this study. Their mean age was 6.1±3.4 years old. The cohort included 271 boys and 57 girls. The percentage of patients remaining in the study for post-treatment follow-up at the 1st, 3rd, 12th, 24th, 36th, 48th and 60th month were as follows: 303 (92.4%), 284 (86.7%), 213 (64.9%), 190 (57.9%), 143 (43.6%), 79 (24.1%), 46 (14.0%), 31 (9.5%). After FMT, the average ABC score was significantly improved in the first 36 months and remained improved at the 48th month. However, the average score was not significantly different from baseline by the 60th month (1st-36th month, P<0.001; 48th month, P=0.008; 60th month, P=0.108). The average CARS score improved significantly during the first 48 months and remained improved at the 60th month (1st-48th month, P<0.001; 60th month, P=0.010). The average BSFS score was also significantly improved in the first 36 months (with an accompanying stool morphology that resembled type 4). This improvement was maintained at the 48th month. However, the average score was similar to baseline at the 60th month (1st-36th month, P<0.001; 48th month, P=0.008; 60th month, P=0.109). The average GSRS score was significantly improved during the first 24 months, but not afterwards (1st-24th month, P<0.001; 36th month, P=0.209; 48th month, P=0.996; 60th month, P=0.668). The adverse events recorded during treatment included abdominal distension in 21 cases (6.4%), nausea in 14 cases (4.3%), vomiting in 9 cases (2.7%), abdominal pain in 15 cases (4.6%), diarrhea in 18 cases (5.5%), fever in 13 cases (4.0%), and excitement in 24 cases (7.3%). All adverse reactions were mild to moderate and improved immediately after suspension of FMT or on treatment of symptoms. No serious adverse reactions occurred. Conclusion: FMT has satisfactory long-term efficacy and safety for the treatment of ASD with gastrointestinal symptoms.
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Affiliation(s)
- C Ye
- Department of Colorectal Disease Specialty, the Tenth People's Hospital, Clinical Research Center for Digestive Diseases Tongji University, Shanghai 200072, China
| | - Q Y Chen
- Department of Colorectal Disease Specialty, the Tenth People's Hospital, Clinical Research Center for Digestive Diseases Tongji University, Shanghai 200072, China
| | - X Q Ma
- Department of Colorectal Disease Specialty, the Tenth People's Hospital, Clinical Research Center for Digestive Diseases Tongji University, Shanghai 200072, China
| | - P Lv
- Department of Colorectal Disease Specialty, the Tenth People's Hospital, Clinical Research Center for Digestive Diseases Tongji University, Shanghai 200072, China
| | - H L Yang
- Department of Colorectal Disease Specialty, the Tenth People's Hospital, Clinical Research Center for Digestive Diseases Tongji University, Shanghai 200072, China
| | - D Tian
- Department of Colorectal Disease Specialty, the Tenth People's Hospital, Clinical Research Center for Digestive Diseases Tongji University, Shanghai 200072, China
| | - Z L Zhao
- Department of Colorectal Disease Specialty, the Tenth People's Hospital, Clinical Research Center for Digestive Diseases Tongji University, Shanghai 200072, China
| | - J Q Lin
- Department of Colorectal Disease Specialty, the Tenth People's Hospital, Clinical Research Center for Digestive Diseases Tongji University, Shanghai 200072, China
| | - N Cui
- Department of Colorectal Disease Specialty, the Tenth People's Hospital, Clinical Research Center for Digestive Diseases Tongji University, Shanghai 200072, China
| | - H L Li
- Department of General Surgery, Jinling Hospital, Nanjing 210002, China
| | - Huanlong Qin
- Department of Colorectal Disease Specialty, the Tenth People's Hospital, Clinical Research Center for Digestive Diseases Tongji University, Shanghai 200072, China
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Ma XQ, Li N, Zhang RF. [Phenotype and genetic mutation analysis of an inherited protein C deficiency pedigree]. Zhonghua Jie He He Hu Xi Za Zhi 2021; 44:1078-1084. [PMID: 34915621 DOI: 10.3760/cma.j.cn112147-20210331-00219] [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: 06/14/2023]
Abstract
Objective: A phenotypic and gene mutation study was carried out to investigate the molecular mechanism of inherited protein C deficiency in a family with the disorder. Methods: The proband was a 21-year-old male who was admitted to hospital due to swelling of the left lower limb for 3 months and hemoptysis with chest tightness for more than 1 week. The clinical diagnosis was pulmonary embolism and deep vein thrombosis of the left lower limb. Plasma protein C activity, protein S activity and antithrombin Ⅲ activity were detected in the patient and their family members. Whole exon sequencing was used to analyze a total of 199 genes associated with thrombus susceptibility of the patient. After the mutation was found and Sanger sequencing was used to verify whether the family members carried the same gene mutations as the patient. The conservation of amino acid mutation sites was analyzed by using the software ClustalX-2.1-win. The damage of mutations to protein function was analyzed by PROVEAN and PolyPhen-2 online bioinformatics software. Finally, PyMOL 2.3 software was used to analyze the protein model. Results: The patient and four family members all had the identical heterozygous missense mutation c.1019 C>T (p. Thr340Met) in exon 9 of the protein C gene, resulting in various degrees of protein C deficiency. The Thr340 amino acid was discovered to be poorly conserved in seven homologous species after investigation with the clustalx-2.1-win software. P. Thr340Met was found to be a detrimental mutation by both PROVEAN and PolyPhen-2 online bioinformatics program. The mutation of Thr340 to Met340 caused the hydrogen bond between Thr340 and Gln226 to dissolve, changing the spatial arrangement of protein C, which might be the main explanation for the lower protein C activity, according to the protein model. Conclusions: Protein C deficiency in this family was caused by a hybrid missense mutation C. 1019 C>T (p. Thr340Met). Protein C deficiency may present in varying severity among mutation carriers at the same locus of the protein C gene. Whole-exome sequencing may be considered in young patients with spontaneous venous thromboembolism, even if there is no relevant family history.
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Affiliation(s)
- X Q Ma
- Department of Respiratory and Critical Care Medicine, Shaoxing People's Hospital (Shaoxing Hospital, Zhejiang University School of Medicine), Shaoxing 312000, China
| | - N Li
- Department of Respiratory and Critical Care Medicine, Sir Run Run Shaw Hospital, Medical School of Zhejiang University, Hangzhou 310016, China
| | - R F Zhang
- Department of Respiratory and Critical Care Medicine, Zhongda Hospital Southeast University, Nanjing 210009, China
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Liu ZH, Zhang QQ, Zhang YJ, Zhang HG, Ma XQ, Liu EK. Evolution of diverse Hall effects during the successive magnetic phase transitions in Mn 2.5Fe 0.6Sn 0.9 Kagome-lattice alloy. J Phys Condens Matter 2021; 33:115803. [PMID: 33316787 DOI: 10.1088/1361-648x/abd337] [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
Evolution of diverse Hall effects due to successive magnetic transitions has been observed in Mn2.5Fe0.6Sn0.9 by suitable chemical substitution of Fe in Mn3.1Sn0.9. This noncollinear antiferromagnetic alloy exhibits a Neel temperature of 325 K. Upon cooling from 325 K, a magnetic phase transition from noncollinear antiferromagnetism to ferromagnetism occurs at 168 K due to the tilting of magnetization towards c axis. Above this temperature, anomalous Hall resistivity ranged from 0.6 to 1.3 μΩ cm has been observed in noncollinear antiferromagnetic state. Below this temperature, a topological Hall effect (THE) starts to appear due to the non-vanishing scalar spin chirality arising from the noncoplanar spin structure. Further decreasing temperature to 132 K, another magnetic transition happens, resulting in the coexistence of ferromagnetism and antiferromagnetism, so that a Hall plateau with large hysteresis below 70 K is yielded. A hysteresis as high as ∼80 kOe is obtained in ρ xy -H at 15 K. However, the Hall plateau disappears and only anomalous Hall effect (AHE) persists when further decreasing the temperature to 5 K. The present study provides a picture of diverse magneto-transport properties correlated to the variable spin structures driven by magnetic phase transitions.
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Affiliation(s)
- Z H Liu
- Department of Physics, Beijing Engineering Research Center of Detection and Application for Weak Magnetic Field, University of Science and Technology Beijing, Beijing 100083, People's Republic of China
| | - Q Q Zhang
- Department of Physics, Beijing Engineering Research Center of Detection and Application for Weak Magnetic Field, University of Science and Technology Beijing, Beijing 100083, People's Republic of China
| | - Y J Zhang
- Department of Physics, Beijing Engineering Research Center of Detection and Application for Weak Magnetic Field, University of Science and Technology Beijing, Beijing 100083, People's Republic of China
| | - H G Zhang
- College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, People's Republic of China
| | - X Q Ma
- Department of Physics, Beijing Engineering Research Center of Detection and Application for Weak Magnetic Field, University of Science and Technology Beijing, Beijing 100083, People's Republic of China
| | - E K Liu
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
- Songshan Lake Materials Laboratory, Dongguan, Guangdong 523808, People's Republic of China
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Zeng XT, Ma XQ, Gu XN, Deng SM, Zhu TF. [Correlative factors analysis and predictive model construction of intestinal flora imbalance during acute exacerbation of chronic obstructive pulmonary disease]. Zhonghua Yi Xue Za Zhi 2020; 100:3174-3178. [PMID: 33142402 DOI: 10.3760/cma.j.cn112137-20200612-01836] [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 explore correlative factors and construct predictive model of intestinal flora imbalance in patients with acute exacerbation of Chronic Obstructive Pulmonary Disease (COPD). Methods: The patients in acute exacerbation stage of COPD (AECOPD) hospitalized in Yixing People's Hospital from January 1 to December 31, 2019 were included. According to the clinical symptoms and results of fecal examination, the subjects were divided into case group (n=45) and control group (n=83). Multivariate logistic regression was used to analyze the correlative factors of intestinal flora imbalance in AECOPD patients. The prediction model of intestinal flora imbalance in patients with AECOPD was constructed according to the results of factor logistic regression analysis, and the effectiveness of the prediction model was evaluated by receiver operating characteristic (ROC) curve analysis. Results: The ages of subjects in case group and control group were (76±9) and (74±8) years old, respectively, among which males accounted for 80.0% (36/45) and 69.9% (58/83), respectively. The multivariate logistic regression model analysis showed that serum albumin concentration, frequency of acute exacerbation ≥2 times/year, complicated with chronic cor pulmonale and diabetes mellitus were correlative factors of intestinal flora imbalance in patients with AECOPD. The OR (95%CI) were 0.98 (0.80-0.97), 3.70 (1.79-11.72), 2.62 (1.46-10.80) and 3.85 (1.17-8.58), respectively. The prediction model of intestinal flora imbalance was logit P=3.858-0.13×serum albumin consentration+1.52×acute exacerbation ≥2 times/year+1.379×chronic cor pulmonale+1.155×diabetes mellitus. The area under the ROC curve of this model was 0.847 and the sensitivity and specificity of the prediction model were 88.9% and 71.1%, respectively. Conclusions: Serum albumin, frequency of acute exacerbation ≥2 times/year, complicated with chronic cor pulmonale and diabetes mellitus are correlative factors of intestinal flora imbalance in patients with AECOPD. The predictive model shows high clinical value in predicting intestinal flora imbalance in patients with AECOPD.
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Affiliation(s)
- X T Zeng
- Department of Respiratory and Critical Medicine, Yixing Hospital affiliated to Jiangsu University, Yixing 214200, China
| | - X Q Ma
- Department of Respiratory and Critical Medicine, Yixing Hospital affiliated to Jiangsu University, Yixing 214200, China
| | - X N Gu
- Department of Respiratory and Critical Medicine, Yixing Hospital affiliated to Jiangsu University, Yixing 214200, China
| | - S M Deng
- Department of Respiratory and Critical Medicine, Yixing Hospital affiliated to Jiangsu University, Yixing 214200, China
| | - T F Zhu
- Department of Respiratory and Critical Medicine, Yixing Hospital affiliated to Jiangsu University, Yixing 214200, China
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Ma XQ, Jiang CQ, Xu L, Zhang WS, Zhu F, Jin YL, Thomas GN, Lam TH. Sleep quality and cognitive impairment in older Chinese: Guangzhou Biobank Cohort Study. Age Ageing 2019; 49:119-124. [PMID: 31665199 DOI: 10.1093/ageing/afz120] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [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: 10/24/2018] [Revised: 07/15/2019] [Accepted: 08/28/2019] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND evidence concerning the relationship between sleep quality and cognitive impairment is limited and inconsistent. OBJECTIVE to examine the association of sleep quality with memory impairment and poor cognitive function in a large sample of older Chinese. METHODS 15,246 participants aged 50+ years of the Guangzhou Biobank Cohort Study who attended the second physical examination from 2008 to 2012 were included. Sleep quality was assessed using Pittsburgh Sleep Quality Index (PSQI), and cognitive performance was assessed using both Delayed Word Recall Test (DWRT) and Mini-Mental State Examination (MMSE). Memory impairment was defined by DWRT score < 4 and poor cognitive function by MMSE score < 25. RESULTS after adjusting for potential confounders, lower habitual sleep efficiency was associated with a higher risk of memory impairment and poor cognitive function with a dose-response pattern (both P for trend <0.001). The adjusted odds ratio (OR, 95% confidence interval (CI)) for poor cognitive function in those with the sleep efficiency of 75-85%, 65-75% and <65%, versus ≥85%, was 1.31 (1.12-1.53), 1.41 (1.16-1.73) and 1.33 (1.09-1.63), respectively. No association of the global PSQI score with memory impairment or poor cognitive function was found. CONCLUSIONS in older Chinese people, lower habitual sleep efficiency was associated with a higher risk of memory impairment and poorer cognitive function.
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Affiliation(s)
- Xiao Qing Ma
- School of Public Health, Sun Yat-sen University, Guangzhou, China
| | | | - Lin Xu
- School of Public Health, Sun Yat-sen University, Guangzhou, China
- School of Public Health, The University of Hong Kong, Hong Kong
| | | | - Feng Zhu
- Guangzhou No.12 Hospital, Guangzhou 510620, China
| | - Ya Li Jin
- Guangzhou No.12 Hospital, Guangzhou 510620, China
| | - G Neil Thomas
- Institute of Applied Health Research, University of Birmingham, Birmingham, UK
| | - Tai Hing Lam
- Guangzhou No.12 Hospital, Guangzhou 510620, China
- School of Public Health, The University of Hong Kong, Hong Kong
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Zou Z, Ma XQ, Zou L, Shi ZZ, Sun QQ, Liu Q, Liang TT, Li CM. Tailoring pore structures with optimal mesopores to remarkably promote DNA adsorption guiding the growth of active Mn 3(PO 4) 2 toward sensitive superoxide biomimetic enzyme sensors. Nanoscale 2019; 11:2624-2630. [PMID: 30693354 DOI: 10.1039/c8nr08829b] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The great challenge in preparing a biomimetic enzyme sensor is to have sensitivity and selectivity equal to or better than its corresponding biological sensor. Porous electrodes possess a large surface area and are often used to greatly improve the sensor sensitivity. However, how to tailor the pore structure, especially the pore size distribution to further improve the sensitivity and selectivity of a biomimetic sensor, has not been investigated yet. The superoxide anion (O2˙-) plays essential roles in various biological processes and is of importance in clinical diagnosis and life science research. It is generally detected by the superoxide dismutase enzyme. Herein, we delicately tailor the pore structure of carbon nanofibers (CNFs) by pyrolysis to obtain an optimal mesopore structure for strong adsorption of DNA, followed by guiding the growth of Mn3(PO4)2 as a biomimetic enzyme toward highly sensitive detection of O2˙-. The Mn3(PO4)2-DNA/CNF sensor achieves the best sensitivity among the reported O2˙- sensors while possessing good selectivity. The enhancement mechanism is also investigated, indicating that the mesopore ratio of CNFs plays an essential role in the high sensitivity and selectivity due to their strong adsorption of DNA for guiding the growth of a large amount of uniform sensing components, Mn3(PO4)2, toward high sensitivity and selectivity. The biomimetic sensor was further used to in situ monitor O2˙- released from human keratinocyte cells and human malignant melanoma cells under drug stimulation, showing high sensitivity to real-time quantitative detection of O2˙-. This work provides a highly sensitive in situ real-time biomimetic O2˙- sensor for applications in biological research and diagnosis, while shedding light on the enhancement mechanism of the pore structure, especially the pore size distribution of a porous electrode for high performance sensing processes.
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Affiliation(s)
- Zhuo Zou
- Institute for Clean Energy & Advanced Materials, Southwest University, Chongqing 400715, P.R. China.
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Liu Y, Ma XQ, Sun XH, Dai S, Zhang JF, Li HB, Ma X, Wang JY, Dou Q, Tian JY, Jia JP. [The application of 3D reconstruction in investigating the frontal sinus drainage pathway based on computer tomography data]. Lin Chung Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2018; 32:171-176. [PMID: 29775014 DOI: 10.13201/j.issn.1001-1781.2018.03.003] [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] [Subscribe] [Scholar Register] [Received: 10/26/2017] [Indexed: 11/12/2022]
Abstract
Objective:The aim of this study is to explore the value of 3D reconstruction technology based on computer tomography data in understanding the frontal sinus drainage pathway. Method:Three-dimensional reconstruction of DICOM data from 100 cases of sinus CT was performed by using Mimics 19.0 software. The 3D models were used to study types, the relative locations of frontal sinus and recess cells as well as the influence of the frontal sinus drainage pathway. Result:The 3D model of frontal sinus, frontal recess cells and frontal sinus drainage pathway were reconstructed successfully. Among them, the incidence of nasal cavity was 95.5% (191/200), nasal cavity was 31.5% (63/200), nasal cavity on the frontal air room was 24.5% (49/200) supra bulla cells were 54% (108/200), supra bulla frontal cells were 14.5% (29/200), supraorbital ethmoid cells were 20.5% (41/200), and the rate of frontal septal cells were 4% (8/200). It visually demonstrated the relationship between the frontal recess and the frontal sinus drainage channel. Conclusion:The 3D reconstruction technology based on computer tomography data not only helps us to understand the anatomy of the frontal sinus, the relative position of the frontal crypt and the effect on the frontal sinus drainage channel, but also provides a new method for preoperative planning and intraoperative guidance to endoscopic frontal sinus surgery.
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Affiliation(s)
- Y Liu
- The Educational Base of the 463 Hospital of PLA, Jinzhou Medical University, Shenyang, 110042, China
| | - X Q Ma
- Department of Radiology, the 463 Hospital of PLA
| | - X H Sun
- Department of Otorhinolaryngology, the 463 Hospital of PLA
| | - S Dai
- Department of Otorhinolaryngology, the 463 Hospital of PLA
| | - J F Zhang
- Department of Radiology, the 463 Hospital of PLA
| | - H B Li
- Department of Otorhinolaryngology, the 463 Hospital of PLA
| | - X Ma
- Shenyang Orthopedic Hospital(Liaoning Osteoarthropathy Key Laboratory)
| | - J Y Wang
- Shenyang Orthopedic Hospital(Liaoning Osteoarthropathy Key Laboratory)
| | - Q Dou
- Department of Otorhinolaryngology, the 463 Hospital of PLA
| | - J Y Tian
- The Educational Base of the 463 Hospital of PLA, Jinzhou Medical University, Shenyang, 110042, China
| | - J P Jia
- Department of Otorhinolaryngology, the 463 Hospital of PLA
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Ma XQ, Dai HP, Wang C. [The timing and prognosis of lung transplantation for chronic sarcoidosis]. Zhonghua Jie He He Hu Xi Za Zhi 2017; 40:769-772. [PMID: 29050132 DOI: 10.3760/cma.j.issn.1001-0939.2017.10.013] [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: 06/07/2023]
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Liu ZH, Zhang YJ, Liu GD, Ding B, Liu EK, Jafri HM, Hou ZP, Wang WH, Ma XQ, Wu GH. Transition from Anomalous Hall Effect to Topological Hall Effect in Hexagonal Non-Collinear Magnet Mn 3Ga. Sci Rep 2017; 7:515. [PMID: 28364119 PMCID: PMC5428815 DOI: 10.1038/s41598-017-00621-x] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [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: 11/30/2016] [Accepted: 03/06/2017] [Indexed: 11/09/2022] Open
Abstract
We report experimental observation of large anomalous Hall effect exhibited in non-collinear triangular antiferromagnet D019-type Mn3Ga with coplanar spin structure at temperatures higher than 100 K. The value of anomalous Hall resistivity increases with increasing temperature, which reaches 1.25 μΩ · cm at a low field of ~300 Oe at room temperature. The corresponding room-temperature anomalous Hall conductivity is about 17 (Ω · cm)−1. Most interestingly, as temperature falls below 100 K, a temperature-independent topological-like Hall effect was observed. The maximum peak value of topological Hall resistivity is about 0.255 μΩ · cm. The appearance of the topological Hall effect is attributed to the change of spin texture as a result of weak structural distortion from hexagonal to orthorhombic symmetry in Mn3Ga. Present study suggests that Mn3Ga shows promising possibility to be antiferromagnetic spintronics or topological Hall effect-based data storage devices.
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Affiliation(s)
- Z H Liu
- Department of Physics, University of Science and Technology Beijing, Beijing, 100083, People's Republic of China.
| | - Y J Zhang
- Department of Physics, University of Science and Technology Beijing, Beijing, 100083, People's Republic of China
| | - G D Liu
- School of Material Science and Engineering, Hebei University of Technology, Tianjin, 300130, People's Republic of China
| | - B Ding
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, People's Republic of China
| | - E K Liu
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, People's Republic of China.
| | - Hasnain Mehdi Jafri
- Department of Physics, University of Science and Technology Beijing, Beijing, 100083, People's Republic of China
| | - Z P Hou
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, People's Republic of China
| | - W H Wang
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, People's Republic of China
| | - X Q Ma
- Department of Physics, University of Science and Technology Beijing, Beijing, 100083, People's Republic of China
| | - G H Wu
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, People's Republic of China
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Luo SM, Ma XQ, Zhou ZG. [Genetic characteristics of fulminant type 1 diabetes]. Zhonghua Yi Xue Za Zhi 2017; 97:561-563. [PMID: 28260298 DOI: 10.3760/cma.j.issn.0376-2491.2017.08.001] [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: 06/06/2023]
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Zheng XT, Ma XQ, Li CM. Highly efficient nuclear delivery of anti-cancer drugs using a bio-functionalized reduced graphene oxide. J Colloid Interface Sci 2016; 467:35-42. [DOI: 10.1016/j.jcis.2015.12.052] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2015] [Revised: 12/28/2015] [Accepted: 12/29/2015] [Indexed: 12/31/2022]
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Yao J, Wang RH, Li B, Wang Y, Zhu P, Li XJ, Ma XQ, Ma MJ, Yin LF. Significance of detecting IgH and TCRγ gene rearrangements in patients with hemopoietic maligancies by real-time quantitative PCR. Genet Mol Res 2015; 14:12168-77. [PMID: 26505365 DOI: 10.4238/2015.october.9.5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
The aim of our study was to investigate the association of IgH and TCRγ gene rearrangements in hematological malignancies with the disease and clinical application. IgH and TCRγ gene rearrangements were determined in 69 paraffin and bone marrow specimens with SYBR Green I fluorescent dye and RQ-PCR method, including 21 paraffin-embedded tissues of the onset cases and 48 bone marrow samples, representing 15 ALL and 25 AML cases. After chemotherapy, 8 cases were NHL; the 10 cases of the negative control group were healthy people. Among the ALL cases, the IgH rearrangement occurred in 80.0%, the TCRγ rearrangement in 46.7%, and both gene rearrangements in 46.7%. Among the AML cases, the IgH rearrangement occurred in 72.0%, the TCRγ rearrangement in 68.0%, and both gene rearrangements in 60.0%. In the lymphoma cases, the IgH rearrangement occurred in 93.1%, the TCRγ rearrangement in 51.7%, and both gene rearrangements in 44.8%. In the negative control group, the 10 cases were all negative. There was the phenomenon of "sequence-non-fidelity" in the hematologic malignancies; the detection rate of both genes was much higher than that of the single gene. The application of the RQ-PCR method in the detection of IgH and TCRγ gene rearrangements in hematologic malignancies has important clinical significance in MRD monitoring.
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Affiliation(s)
- J Yao
- Department of Hematology, The Second Affiliated Hospital of Kunming Medical University, Kunming, China
| | - R H Wang
- Department of Hematology, The Second Affiliated Hospital of Kunming Medical University, Kunming, China
| | - B Li
- Department of Orthopedic, The First Afiliated Hospital of Kunming Medical University, Kunming, China
| | - Y Wang
- Department of Hematology, The Second Affiliated Hospital of Kunming Medical University, Kunming, China
| | - P Zhu
- Department of Hematology, The Second Affiliated Hospital of Kunming Medical University, Kunming, China
| | - X J Li
- Department of Hematology Onset Molecular Biology Laboratory, The Second People's Hospital of Yunnan Province, Kunming, China
| | - X Q Ma
- Department of Kunming Medical University, Kunming, China
| | - M J Ma
- Department of Kunming Medical University, Kunming, China
| | - L F Yin
- Department of Hematology, The Second Affiliated Hospital of Kunming Medical University, Kunming, China
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Dai GJ, Cheng SH, Hua ZT, Zhang ML, Jiang HB, Feng Y, Shen XH, Su YA, He N, Ma ZB, Ma XQ, Hou SG, Wang YR. Mapping quantitative trait loci for nitrogen uptake and utilization efficiency in rice (Oryza sativa L.) at different nitrogen fertilizer levels. Genet Mol Res 2015; 14:10404-14. [PMID: 26400271 DOI: 10.4238/2015.september.8.1] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Genetic improvement is the fundamental basis for improving nitrogen-use efficiency. A better understanding of genetic factors controlling nitrogen uptake and utilization is required for crop genetic improvement. In this study, we identified the quantitative trait loci (QTLs) associated with traits of nitrogen uptake and utilization by using the single-sequence repeat marker method and a recombinant inbred line (RIL) population derived from a super hybrid Xieyou9308. All the traits investigated were inherited quantitatively by continuous variation and showed normal distribution in phenotype with transgressive segregation in the RIL population. Most of the traits were significantly correlated with each other except for nitrogen absorption ability (NAA) with nitrogen harvest index (NHI) and NHI with agricultural nitrogen-absorption efficiency (ANAE). At logarithmic odds value of 2.3, total 13 candidate QTLs, including 4 for NAA, 2 for NHI, 2 for physiological nitrogen-use efficiency, 1 for agricultural nitrogen-use efficiency (ANUE), and 4 for ANAE, were detected and mapped on chromosomes 2, 3, 4, 5, 8, 9, 10, and 12. Significant pleiotropic effect or neighboring expression of QTLs was observed among traits. At position 64.8 cM on chromosome 4 near the marker RM5757, there was a QTL cluster of NAA, ANUE, and ANAE, and at chromosome 5 near the marker RM5968, there was a QTL cluster of NAA and ANUE. The QTL clusters might provide partial explanation and genetic mechanism for the observed correlations between nitrogen uptake and utilization efficiency traits and might form a basis for future breeding programs.
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Affiliation(s)
- G J Dai
- Rice Research Institute, Liaoning Academy of Agricultural Sciences, Shenyang, China
| | - S H Cheng
- China National Rice Research Institute, Hangzhou, China
| | - Z T Hua
- Tianjin University of Science & Technology, Tianjin, China
| | - M L Zhang
- Rice Research Institute, Liaoning Academy of Agricultural Sciences, Shenyang, China
| | - H B Jiang
- Rice Research Institute, Liaoning Academy of Agricultural Sciences, Shenyang, China
| | - Y Feng
- China National Rice Research Institute, Hangzhou, China
| | - X H Shen
- China National Rice Research Institute, Hangzhou, China
| | - Y A Su
- Rice Research Institute, Liaoning Academy of Agricultural Sciences, Shenyang, China
| | - N He
- Rice Research Institute, Liaoning Academy of Agricultural Sciences, Shenyang, China
| | - Z B Ma
- Rice Research Institute, Liaoning Academy of Agricultural Sciences, Shenyang, China
| | - X Q Ma
- Rice Research Institute, Liaoning Academy of Agricultural Sciences, Shenyang, China
| | - S G Hou
- Rice Research Institute, Liaoning Academy of Agricultural Sciences, Shenyang, China
| | - Y R Wang
- Rice Research Institute, Liaoning Academy of Agricultural Sciences, Shenyang, China
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14
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Yu L, Gao LX, Ma XQ, Hu FX, Li CM, Lu Z. Involvement of superoxide and nitric oxide in BRAF(V600E) inhibitor PLX4032-induced growth inhibition of melanoma cells. Integr Biol (Camb) 2014; 6:1211-7. [PMID: 25363644 DOI: 10.1039/c4ib00170b] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
The BRAF(V600E) inhibitor PLX4032 (Vemurafenib) is an FDA-approved new drug for the treatment of metastatic melanomas, which specifically inhibits the RAS/MEK/ERK signaling pathway to control cell proliferation and adhesion. However, no study has been carried out to investigate the role of intracellular oxidative balance in PLX4032-induced tumor growth inhibition. Herein, for the first time, superoxide (O2˙(-)) and nitric oxide (NO) generated from PLX4032-challenged melanoma cells were monitored using electrochemical sensors and conventional fluorescein staining techniques. Impacts of superoxide dismutase (SOD) and NG-monomethyl-L-arginine monoacetate (L-NMMA), a nitric oxide synthase inhibitor, were also examined to demonstrate the specificity of ROS/NO generation and its biological consequences. PLX4032 specifically triggers production of O2˙(-) and NO from BRAF(V600E) mutant A375 cells. SOD and L-NMMA could abolish the PLX4032-induced increase in intracellular O2˙(-) and NO production, thereby rescuing cell growth in BRAF mutant A375 cells (A375(BRAFV600E)). In addition, PLX4032 treatment could decrease the mitochondrial membrane potential in A375(BRAFV600E) cells. The results suggest that PLX4032 can selectively cause ROS production and depolarization of mitochondrial membranes, potentially initiating apoptosis and growth inhibition of PLX4032-sensitive cells. This work not only proposes a new mechanism for PLX4032-induced melanoma cell inhibition, but also highlights potential applications of electrochemical biosensors in cell biology and drug screening.
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Affiliation(s)
- Ling Yu
- Institute for Clean Energy & Advanced Materials, Faculty of Materials and Energy, Southwest University, Chongqing 400715, China.
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15
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Liu HB, Gu XL, Ma XQ, Lv TF, Wu Y, Xiao YY, Yuan DM, Li YF, Song Y. Preoperative platelet count in predicting lymph node metastasis and prognosis in patients with non-small cell lung cancer. Neoplasma 2013; 60:203-8. [PMID: 23259790 DOI: 10.4149/neo_2013_027] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Recent studies have shown an indirect link between platelet count and blood vessel metastasis, but this association with lymphatic vessels metastasis has not been established in NSCLC. So we investigated whether an association exists between preoperative platelet count and lymph node metastasis in NSCLC patients. Between January 2001 and January 2011, platelet counts were obtained from 883 NSCLC patients who were resistant to chemotherapy, radiotherapy, and surgery. The preoperative platelet counts, tumor metastasis, and overall survival of NSCLC patients were analyzed for correlations via statistical analysis. Upon considering patients according to their TNM lymph node metastasis stage (N0-N3), multiple comparison analyses revealed that the mean preoperative platelet count of the N0 group was significantly lower than that of the N1-N3. Analysis of variance showed that the preoperative platelet count of patients in stage I was significantly lower than that of those in stages II, III, and IV, with no significant difference among the latter three stages. According to the Kaplan-Meier survival analysis, the overall survival of patients with platelet counts <214.5 × 109/L was significantly longer than that of those with platelet counts ≥214.5 × 109/L. Cox regression analysis indicated that, besides preoperative platelet count, patient age, gender, and TNM stage were independent prognostic factors. In conclusion, preoperative platelet count was significantly associated with metastasis of lymph nodes in NSCLC patients. Preoperative platelet count may be a reliable biomarker of lymph node metastasis possibility and an independent prognostic factor of overall survival in patients with NSCLC.
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Affiliation(s)
- H B Liu
- Department of Respiratory Medicine, Nanjing University School of Medicine, Nanjing, China
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16
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Ma XQ, Zhu DY, Li SP, Dong TT, Tsim KW. Authentic identification of stigma Croci (stigma of Crocus sativus) from its adulterants by molecular genetic analysis. Planta Med 2001; 67:183-186. [PMID: 11301875 DOI: 10.1055/s-2001-11533] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Stigma Croci, stigma of Crocus sativus L., is a precious traditional Chinese medicine, which is commonly used to activate blood circulation and to dissipate blood stasis. Three plant species, Carthamus tinctorius L., Hemerocallis fulva (L.) L. and Hemerocallis citrina Baroni, could carry the name Stigma Croci in the commercial markets of South East Asia. However, C. sativus is the only one that has proven its effectiveness, while the others could act as adulterants. The authentic identification of C. sativus on the market is difficult. By using molecular genetic method, the spacer domains of 5S-rRNA were cloned from the genomic DNAs that were isolated from C. sativus, C. tinctorius, H. fulva and H. citrina. The cDNAs encoding the spacer domains, about 300 to 500 bp, were sequenced. The nucleotide sequences of these four species showed great diversity, which could serve as markers for authentic identification of Stigma Croci to distinguish from its substitution and counterfeit.
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17
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Ma XQ, Duan JA, Zhu DY, Dong TT, Tsim KW. Species identification of Radix Astragali (Huangqi) by DNA sequence of its 5S-rRNA spacer domain. Phytochemistry 2000; 54:363-368. [PMID: 10897476 DOI: 10.1016/s0031-9422(00)00111-4] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
About 300 species and varieties of Astragalus are identified in China, making the identification of the origin of a particular Astragalus species on the consumer market difficult. A molecular genetic approach was developed to identify various species of Astragalus. Although the 5S-rRNA coding sequence is conserved in higher eukaryotes, the spacer domain of the 5S-rRNA gene has great diversity among different species. The 5S-rRNA spacer domain was amplified by polymerase chain reaction (PCR) from the isolated genomic DNA, and the PCR products (approximately 300 bp) covering the 5S-rRNA spacer domain were sequenced. The nucleotide sequences of Astragalus membranaceus, A. membranaceus var. mongholicus, A. lehmannianus, A. hoantchy, and of one closely related species Hedysarum polybotrys (Hongqi), were determined. Diversity in DNA sequence and restriction enzyme mapping among various species was found in their 5S-rRNA spacer domains. This is the first report on the detection of 5S-rRNA spacer region sequence of Astragalus, and the results could be used for genetic identification of Huangqi.
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Affiliation(s)
- X Q Ma
- Department of Biology, Hong Kong University of Science and Technology, Hong Kong
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18
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Ma XQ, He SR, Zheng DM, Wu WG. [Relation between endothelin and labor induction]. Zhonghua Fu Chan Ke Za Zhi 1995; 30:50-2. [PMID: 7750408] [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: 01/26/2023]
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19
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Gao B, Ma XQ, Wang YP, Chen SZ, Wu S, Dong YC. Refined structure of trichosanthin at 1.73 A resolution. Sci China B 1994; 37:59-73. [PMID: 8068187] [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: 01/28/2023]
Abstract
An X-ray reflection data set of the orthorhombic crystal of Trichosanthin (TCS) at 1.73 A resolution had been collected using the area detector. We determined TCS crystal structure by the molecular replacement method using the data of the known alpha-momocharin model and TCS intensities, and then TCS structure refinement at 1.73 A resolution was performed with the restrained least-squares refinement. A final R-factor of 0.186 was obtained with a model obeying standard geometry within 0.013 A in bond lengths and 2.48 degrees in bond angles. The final model contains 133 solvent molecules in the asymmetric unit. This paper gives a detailed description of TCS molecule structure, temperature factors, hydrogen bonds, bound water, the distribution of conserved residues and the interactions between the TCS molecules. The hydrogen bond between the hydroxyl group of conserved residue 14Tyr and O157 plays an important role in maintaining the active site conformation. Conserved residue 160Glu and its conformation at the active site play a key role in the catalytic activity.
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Affiliation(s)
- B Gao
- Institute of Biophysics, Academia Sinica, Beijing, PRC
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20
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Abstract
Quantitative trabecular bone density (TBD) measurements in the appendicular skeleton, using computer tomography, are described. Pixel-value frequency histograms are generated, to determine the spatial coordinates of the centers of mass distribution for both bones in the image field. A line joining these centers is used as an axis for subsequent enhancement of horizontal image features, and for radial fan searches, to separate bone images in the analysis field. One bone image is then deleted and the outer contour of the remaining bone is determined using cross-correlation and mathematical morphology operators. This contour is then used as a template to calculate average linear attenuation coefficients (LACs) over 1-pixel-wide annuli for TBD calculation. Data from 33 individual subjects (1251 images) have been processed using both automatic and manual analysis methods. Both methods give the same numerical values for TBD, but the automatic method has slightly better precision. The analysis method is general and is adaptable to other imaging situations.
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Affiliation(s)
- X Q Ma
- Dept. of Appl. Sci. in Med., Alberta Univ., Edmonton, Alta
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21
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Abstract
Alpha 1-Purothionin (alpha 1-P), a wheatgerm protein and lytic toxin, has a secondary and tertiary structure similar to that of crambin as revealed by CD and NMR studies. alpha 1-P crystallizes in the tetragonal space group 1422 with unit cell dimensions: a = b = 53.59 and c = 69.79 A. X-ray diffraction data have been measured to 2.5 A Bragg spacing. The crystal structure has been determined by molecular replacement methods, using an energy-minimized alpha 1-P model structure derived from crambin (Whitlow and Teeter: Journal of Biomolecular Structure and Dynamics 2:831-848, 1985, Journal of the American Chemical Society 108:7163-7172, 1986). The energy-minimized model gives a slightly cleaner rotation solution and better refinement against the x-ray data than do the crambin or unminimized alpha 1-P structures. The final crystallographic residual with the data in the 10-2.5 A resolution range is 0.216. The refined alpha 1-P structure has a backbone rms difference of 0.74 A from crambin and 0.55 A from the energy-minimized alpha 1-P model. A low resolution NMR model of alpha 1-P calculated from metric matrix distance geometry and restrained molecular dynamics differs from crambin's backbone by 2.3 A rms deviation (Clore et al.: EMBO Journal 5:2729-2735, 1986). Backbone dihedral angles for our predicted model differ from the refined alpha 1-P structure in only one region (at a turn where there is a deletion relative to crambin). The NMR model had differences in four regions.
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Affiliation(s)
- M M Teeter
- Department of Chemistry, Boston College, Chestnut Hill, Massachusetts 02167
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Wang XH, Wang LS, Shi L, Yang J, Ma XQ, Luo HN, Zhou ZF, Xu GC, Li GX. Radioimmunodetection of cancers containing carcinoembryonic antigen and alpha-fetoprotein. Chin Med J (Engl) 1988; 101:175-80. [PMID: 2457471] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
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23
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Ma XQ, Wang YP, Wang JH. An X-ray analysis of the orthorhombic crystal form of trichosanthin at 5 angstrom. Sci Sin B 1987; 30:692-7. [PMID: 3445133] [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: 01/05/2023]
Abstract
Trichosanthin crystals grown at pH 5.4 are orthorhombic P212121 with cell dimension a = 38.23 angstrom, b = 76.18 angstrom and c = 79.12 angstrom. Each asymmetric unit contains one protein molecule of 234 amino acid residues (M. W. 26,000). The structure has been solved at 5 angstrom resolution by conventional MIR method with two heavy-atom derivatives. The preliminary result suggests that the protein molecule in acidic solution does not have dramatic conformational change, compared with that in alkali solution.
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Affiliation(s)
- X Q Ma
- Institute of Biophysics, Academia Sinica, Beijing
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24
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Pan KZ, Lin YJ, Fu ZJ, Zhou KJ, Cai ZP, Chen ZW, Zhang YM, Dong YC, Wu S, Ma XQ. The three-dimensional structure of trichosanthin molecule. Sci Sin B 1987; 30:386-94. [PMID: 3659895] [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: 01/06/2023]
Abstract
A model completed recently of two trichosanthin molecules in an asymmetric unit belonging to the monoclinic system is reported. It can be seen that the molecular structure consists of two domains, one large and one small, and that there are some features in the secondary structure. The dissimilarity between two molecules as well as their interactions in an independent unit correlated in a non-symmetric way has been described, moreover, the binding sites of the heavyatom position in the derivatives are also discussed.
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Affiliation(s)
- K Z Pan
- Fujian Institute of Research on the Structure of Matter, Academia Sinica, Fuzhou
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