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Duan YR, Zhao YC, Song WY, Wang JX, Pei J, Wang XB. [Research advances on improving the therapeutic efficacy of mesenchymal stem cell-derived exosomes in wound repair]. Zhonghua Shao Shang Yu Chuang Mian Xiu Fu Za Zhi 2023; 39:695-700. [PMID: 37805701 DOI: 10.3760/cma.j.cn501225-20220912-00402] [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] [Grants] [Subscribe] [Scholar Register] [Indexed: 10/09/2023]
Abstract
How to promote high-quality wound healing is a common problem for plastic surgery and burn physicians. In recent years, numerous animal studies have demonstrated that mesenchymal stem cell-derived exosomes promote wound repair through multiple mechanisms and are promising cell-free therapeutic agents with broad prospect of application. How to enhance the therapeutic efficacy of exosomes, optimize their drug delivery strategy, and improve their biological properties are the challenges to be overcome in order to move from basic research to clinical application of exosome therapy for wound repair. This article focuses on methods to improve the wound repair potential of mesenchymal stem cell-derived exosomes, and reviews the recent research advances on improving the therapeutic efficacy of mesenchymal stem cell-derived exosomes in wound repair from three aspects, including pretreatment of parental mesenchymal stem cells, hydrogel bio-scaffold loaded with exosomes, and engineered exosomes, to provide a reference for further clinical studies.
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Affiliation(s)
- Y R Duan
- Department of Burns and Plastic Surgery, the First Hospital of Shanxi Medical University, Taiyuan 030001, China
| | - Y C Zhao
- Department of Burns and Plastic Surgery, Xianyang Central Hospital, Xianyang 712099, China
| | - W Y Song
- Department of Burns and Plastic Surgery, the First Hospital of Shanxi Medical University, Taiyuan 030001, China
| | - J X Wang
- Department of Burns and Plastic Surgery, the First Hospital of Shanxi Medical University, Taiyuan 030001, China
| | - J Pei
- Department of Plastic Surgery, Shanxi Bethune Hospital (Shanxi Academy of Medical Sciences, Tongji Shanxi Hospital), the Third Hospital of Shanxi Medical University, Taiyuan 030032, China
| | - X B Wang
- Department of Burns and Plastic Surgery, the First Hospital of Shanxi Medical University, Taiyuan 030001, China
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2
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Huang FL, Zhao YC, Chen FF, Liu JQ. [Research progress on the role of genotype in the risk stratification of arrhythmogenic right ventricular cardiomyopathy]. Zhonghua Xin Xue Guan Bing Za Zhi 2022; 50:336-341. [PMID: 35399029 DOI: 10.3760/cma.j.cn112148-20220219-00121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Affiliation(s)
- F L Huang
- Department of Cardiology, First Affiliated Hospital of Dalian Medical University, Dalian 116021, China
| | - Y C Zhao
- Department of Cardiology, First Affiliated Hospital of Dalian Medical University, Dalian 116021, China
| | - F F Chen
- Department of Cardiology, First Affiliated Hospital of Dalian Medical University, Dalian 116021, China
| | - J Q Liu
- Department of Cardiology, First Affiliated Hospital of Dalian Medical University, Dalian 116021, China
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3
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Zhang Q, Huang WB, Zhao YC, Wang JS, Qi Q, Zhao JH. [Acute monocytic leukemia associated with extramedullary gastric invasion and ascites: report of a case]. Zhonghua Bing Li Xue Za Zhi 2021; 50:948-950. [PMID: 34344085 DOI: 10.3760/cma.j.cn112151-20201201-00884] [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)
- Q Zhang
- Department of Pathology, Nanjing First Hospital, Nanjing Meidcal University, Nanjing 210006, China
| | - W B Huang
- Department of Pathology, Nanjing First Hospital, Nanjing Meidcal University, Nanjing 210006, China
| | - Y C Zhao
- Department of Pathology, Nanjing First Hospital, Nanjing Meidcal University, Nanjing 210006, China
| | - J S Wang
- Department of Pathology, Nanjing First Hospital, Nanjing Meidcal University, Nanjing 210006, China
| | - Q Qi
- Department of Pathology, Nanjing First Hospital, Nanjing Meidcal University, Nanjing 210006, China
| | - J H Zhao
- Department of Pathology, Nanjing First Hospital, Nanjing Meidcal University, Nanjing 210006, China
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Wang YT, Zhang TQ, Zhao YC, Ciborowski JJH, Zhao YM, O'Halloran IP, Qi ZM, Tan CS. Characterization of sedimentary phosphorus in Lake Erie and on-site quantification of internal phosphorus loading. Water Res 2021; 188:116525. [PMID: 33091803 DOI: 10.1016/j.watres.2020.116525] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Revised: 10/08/2020] [Accepted: 10/14/2020] [Indexed: 06/11/2023]
Abstract
Lake Erie harmful algal blooms and hypoxia are two major environmental problems, and have severe impacts on human health, aquatic ecosystems, and the economy. However, little is known about internal loading of phosphorus (P) from sediments, which pose a challenge for assessing the efficacy of current conservation measures on the improvement of lake water quality. A modified Hedley's extraction procedure was employed to analyze representative sediment samples collected from the Lake Erie basin for assessing sedimentary P stock, potential availability for release into lake water, and internal P loading. Inorganic and organic P in the sediments were characterized by sequential extractions in H2O, 0.5 M NaHCO3, 0.1 M NaOH, and 1.0 M HCl, respectively. In the 0 - 10 cm sediment, total P stock was 172, 191, and 170 metric tons km-2 in the western, central, and eastern basins, respectively. Sedimentary P seems unlikely to contribute to internal P loading in the western basin, while in the eastern basin it can potentially contribute to an internal loading of 359 metric tons P yr-1. In the central basin, 41% of organic P, 15% of non-HCl extractable inorganic P, and 9.7% of residual P in the 0 - 10 cm sediment is potentially available for release into lake water; in the 10 - 20 cm sediment, organic P extracted by NaHCO3 and NaOH is also partially available. The central basin potentially contributes to internal P loading at a total amount of 10,599 metric tons yr-1. Internal P loading may not contribute to HABs in the western basin, but it can cause and maintain hypoxia in the central basin and delay the recovery of lake water quality for a lengthy time period in response to external P reduction measures.
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Affiliation(s)
- Y T Wang
- Harrow Research and Development Center, Agriculture and Agri-Food Canada, Harrow, ON N0R 1G0, Canada
| | - T Q Zhang
- Harrow Research and Development Center, Agriculture and Agri-Food Canada, Harrow, ON N0R 1G0, Canada.
| | - Y C Zhao
- Nanotechnology Engineering Program, University of Waterloo, 200 University Ave W, Waterloo, ON N2L 3G1, Canada
| | - J J H Ciborowski
- Department of Biology, University of Windsor, Windsor, ON N9B 3P4, Canada
| | - Y M Zhao
- Aquatic Research and Monitoring Section, Ontario Ministry of Natural Resources and Forestry, 320 Milo Rd, Wheatley, ON N0P 2P0, Canada
| | - I P O'Halloran
- School of Environmental Sciences, Ridgetown Campus, University of Guelph, ON, Canada
| | - Z M Qi
- McGill University, Department of Bioresource Engineering, Sainte-Anne-de-Bellevue, QC H9 × 3V9, Canada
| | - C S Tan
- Harrow Research and Development Center, Agriculture and Agri-Food Canada, Harrow, ON N0R 1G0, Canada
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Zhao YC, Zhang CK, Shen SN. [The influence of Indian medicine on traditional Chinese medicine from Dunhuang medical literature]. Zhonghua Yi Shi Za Zhi 2020; 50:195-199. [PMID: 32911916 DOI: 10.3760/cma.j.cn112155-20190430-00042] [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: 06/11/2023]
Abstract
Through the Silk Road, Chinese medicine has different degrees of absorption on different levels of indic medicine. On the whole, Chinese medicine's absorption of indic medicine is "based on me" , "the way of my own, using the instrument." Taking the four levels of "rational, legal, prescription, and medicine" as the entrance, and analyzing the acceptance attitude of traditional Chinese medicine to Indian medicine with the Dunhuang medical literature as the center.Overall the analysis result on Chinese medicine's absorption of Indic medicine is "Based on our principles, utilising their means" , or can be understood as "fitting the foreign ideas into an already mature infrastructure" .
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Affiliation(s)
- Y C Zhao
- Institute of Traditional Chinese Medicine Literature, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - C K Zhang
- Institute of Traditional Chinese Medicine Literature, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - S N Shen
- Institute of Traditional Chinese Medicine Literature, Nanjing University of Chinese Medicine, Nanjing 210023, China
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Chen FF, Zhao YC, Yin XM, Liu JQ, Xia YL. [Current status of catheter ablation for arrhythmia after cardiac resynchronization therapy in patients with chronic heart failure]. Zhonghua Xin Xue Guan Bing Za Zhi 2019; 47:927-930. [PMID: 31744287 DOI: 10.3760/cma.j.issn.0253-3758.2019.11.016] [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)
- F F Chen
- Department of Cardiology, First Affiliated Hospital of Dalian Medical Universtiy, Dalian 116000, China
| | - Y C Zhao
- Department of Cardiology, First Affiliated Hospital of Dalian Medical Universtiy, Dalian 116000, China
| | - X M Yin
- Department of Cardiology, First Affiliated Hospital of Dalian Medical Universtiy, Dalian 116000, China
| | - J Q Liu
- Department of Cardiology, First Affiliated Hospital of Dalian Medical Universtiy, Dalian 116000, China
| | - Y L Xia
- Department of Cardiology, First Affiliated Hospital of Dalian Medical Universtiy, Dalian 116000, China
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Zhao YC, Lyu HC, Yang G, Dong BW, Qi J, Zhang JY, Zhu ZZ, Sun Y, Yu GH, Jiang Y, Wei HX, Wang J, Lu J, Wang ZH, Cai JW, Shen BG, Zhan WS, Yang F, Zhang SJ, Wang SG. Direct observation of magnetic contrast obtained by photoemission electron microscopy with deep ultra-violet laser excitation. Ultramicroscopy 2019; 202:156-162. [PMID: 31063898 DOI: 10.1016/j.ultramic.2019.04.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [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: 12/11/2018] [Revised: 03/31/2019] [Accepted: 04/17/2019] [Indexed: 11/28/2022]
Abstract
Magnetic circular dichroism (MCD) and magnetic linear dichroism (MLD) have been investigated in a photoemission electron microscopy (PEEM) system excited by a deep ultra-violet (DUV) laser (with λ = 177.3 nm and hυ = 7.0 eV) for the first time. High resolution PEEM magnetic images (down to 43.2 nm) were directly obtained on a (001)-oriented magnetic FePt film surface with a circularly-polarized light under normal incidence. Furthermore, a stepped Cr seeding layer was applied to induce the formation of large-area epitaxial FePt films with (001) and (111) two orientations, where MLD with large asymmetry was observed in the transition area of two phases. It demonstrates that DUV laser can be a powerful source for high resolution magnetic imaging in the laboratory in absence of synchrotron facilities.
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Affiliation(s)
- Y C Zhao
- State Key Laboratory of Magnetism, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China; School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - H C Lyu
- State Key Laboratory of Magnetism, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China; Beijing Advanced Innovation Center for Materials Genome Engineering, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - G Yang
- State Key Laboratory of Magnetism, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China; Beijing Advanced Innovation Center for Materials Genome Engineering, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - B W Dong
- State Key Laboratory of Magnetism, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China; Beijing Advanced Innovation Center for Materials Genome Engineering, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - J Qi
- Beijing Advanced Innovation Center for Materials Genome Engineering, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - J Y Zhang
- Beijing Advanced Innovation Center for Materials Genome Engineering, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Z Z Zhu
- State Key Laboratory of Magnetism, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Y Sun
- State Key Laboratory of Magnetism, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - G H Yu
- Beijing Advanced Innovation Center for Materials Genome Engineering, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Y Jiang
- Beijing Advanced Innovation Center for Materials Genome Engineering, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - H X Wei
- State Key Laboratory of Magnetism, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - J Wang
- State Key Laboratory of Magnetism, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - J Lu
- State Key Laboratory of Magnetism, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Z H Wang
- State Key Laboratory of Magnetism, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - J W Cai
- State Key Laboratory of Magnetism, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - B G Shen
- State Key Laboratory of Magnetism, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - W S Zhan
- State Key Laboratory of Magnetism, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - F Yang
- Key Lab of Functional Crystals and Laser Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - S J Zhang
- Key Lab of Functional Crystals and Laser Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - S G Wang
- State Key Laboratory of Magnetism, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China; Beijing Advanced Innovation Center for Materials Genome Engineering, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China.
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Zhao YC, Chen FF, Gong FY. [Epicardial electrical ablation of ventricular fibrillation storm after implantable cardioverter defibrillor implantation in Brugada syndrome: a case report]. Zhonghua Xin Xue Guan Bing Za Zhi 2018; 46:901-903. [PMID: 30462980 DOI: 10.3760/cma.j.issn.0253-3758.2018.11.015] [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: 06/09/2023]
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Qi Y, Zhang X, Zhao Y, Xie H, Shen X, Niu W, Wang Y. The effect of wheelchair Tai Chi on balance control and quality of life among survivors of spinal cord injuries: A randomized controlled trial. Complement Ther Clin Pract 2018; 33:7-11. [DOI: 10.1016/j.ctcp.2018.07.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2018] [Revised: 07/14/2018] [Accepted: 07/16/2018] [Indexed: 11/29/2022]
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Zhao YC, Qu WQ, Zhang SD. [Effect of robot navigation assisted core decompression combined with bone graft treatment of early stage osteonecrosis of the femoral head]. Zhonghua Wai Ke Za Zhi 2018; 56:849-853. [PMID: 30392306 DOI: 10.3760/cma.j.issn.0529-5815.2018.11.011] [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] [Indexed: 11/05/2022]
Abstract
Objective: To evaluate the effects of orthopedic robot navigation system used in core decompression combined with bone graft surgery for osteonecrosis of the femoral head (ONFH). Methods: A retrospective analysis was performed on 9 patients (16 hips) underwent core decompression surgery combined with bone graft treatment for early ONFH in ARCO Ⅱat Department of Osteoarthropathy, Yantaishan Hospital from June 2016 to February 2018.There were 7 males and 2 females, aged 44.6 years (range: 28-60 years). All surgery procedures were completed by the same doctor under the navigation of orthopedic surgery robot using the specific designed tools. The preoperative and postoperative Harris Hip Score and visual analogue score were compared and the time of intraoperative X-ray fluoroscopy was recorded. Results: The mean follow-up period was (12.7±3.5)months (range: 6-18 months). Four cases of treatment failure were observed in 16 hips at the last follow-up and the hip survival rate was 12/16.In stage ARCO Ⅱa, Ⅱb and Ⅱc, the survival rate was 1/1, 2/2, and 9/13.The Harris Hip Score (88.3±1.9 vs.70.0±3.8, t=16.81, P=0.000) and visual analogue score (3.7±0.7 vs. 0.9±0.6, t=13.49, P=0.000) were improved significantly at the last follow-up compared with preoperative value. The total times of intraoperative X-ray fluoroscopy were 15.9±2.5, including 5.8±1.2 before the insertion of the guiding wire and 10.1±1.7 after the insertion of the guiding wire. Conclusions: The domestic orthopedic surgery robot can be applied successfully in the core decompression combined with bone graft surgery for ONFH . It is less invasive with less fluoroscopy time and better bone graft effects.
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Affiliation(s)
- Y C Zhao
- Department of Osteoarthropathy, Yantaishan Hospital, Yantai 264001, China
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Zhao YC, Xu LW, Ding S, Ji QQ, Lin N, He Q, Gao LC, Su YY, Pu J, He B. Nuclear receptor retinoid-related orphan receptor α deficiency exacerbates high-fat diet-induced cardiac dysfunction despite improving metabolic abnormality. Biochim Biophys Acta Mol Basis Dis 2016; 1863:1991-2000. [PMID: 27825849 DOI: 10.1016/j.bbadis.2016.10.029] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [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: 07/16/2016] [Revised: 10/08/2016] [Accepted: 10/31/2016] [Indexed: 01/16/2023]
Abstract
Retinoid-related orphan receptor α (RORα), a member of the metabolic nuclear receptor superfamily, plays a vital regulatory role in circadian rhythm and metabolism. Here, we investigated the role of RORα in high-fat diet (HFD)-induced cardiac impairments and the underlying mechanisms involved. RORα-deficient stagger mice (sg/sg) and wild type (WT) littermates were fed with either standard diet or HFD. At 20weeks after HFD treatment, RORα deficiency resulted in significantly decreased body weight gain, improved dyslipidemia and ameliorated insulin resistance (evaluated by blood biochemical and glucose/insulin tolerance tests) compared with WT control. However, compared with HFD-treated WT mice, HFD-treated sg/sg mice exhibited significantly augmented myocardial hypertrophy, cardiac fibrosis (wheat germ agglutinin, masson trichrome and sirius red staining) and cardiac dysfunction (echocardiography and hemodynamics). Mechanistically, RORα deficiency impaired mitochondrial biogenesis and function. Additionally, RORα deficiency resulted in inhibition of the AMPK-PGC1α signaling pathway. In contrast, cardiomyocyte-specific RORα overexpression ameliorated myocardial hypertrophy, fibrosis and dysfunction by restoring AMPK-PGC1α signaling, and subsequently normalizing mitochondrial biogenesis. These findings demonstrated for the first time that nuclear receptor RORα deficiency aggravated HFD-induced myocardial dysfunction at least in part by impairing mitochondrial biogenesis in association with disrupting AMPK-PGC1α signaling. This article is part of a Special Issue entitled: Genetic and epigenetic control of heart failure - edited by Jun Ren and Megan Yingmei Zhang.
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Affiliation(s)
- Yi-Chao Zhao
- Department of Cardiology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, 160 PuJian Road, Shanghai 200127, China
| | - Long-Wei Xu
- Department of Cardiology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, 160 PuJian Road, Shanghai 200127, China
| | - Song Ding
- Department of Cardiology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, 160 PuJian Road, Shanghai 200127, China
| | - Qing-Qi Ji
- Department of Cardiology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, 160 PuJian Road, Shanghai 200127, China
| | - Nan Lin
- Department of Cardiology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, 160 PuJian Road, Shanghai 200127, China
| | - Qing He
- Department of Cardiology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, 160 PuJian Road, Shanghai 200127, China
| | - Ling-Chen Gao
- Department of Cardiology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, 160 PuJian Road, Shanghai 200127, China
| | - Yuan-Yuan Su
- Department of Cardiology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, 160 PuJian Road, Shanghai 200127, China
| | - Jun Pu
- Department of Cardiology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, 160 PuJian Road, Shanghai 200127, China.
| | - Ben He
- Department of Cardiology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, 160 PuJian Road, Shanghai 200127, China.
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Gao L, Zhao YC, Liang Y, Lin XH, Tan YJ, Wu DD, Li XZ, Ye BZ, Kong FQ, Sheng JZ, Huang HF. The impaired myocardial ischemic tolerance in adult offspring of diabetic pregnancy is restored by maternal melatonin treatment. J Pineal Res 2016; 61:340-52. [PMID: 27299979 DOI: 10.1111/jpi.12351] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [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: 04/12/2016] [Accepted: 06/13/2016] [Indexed: 01/01/2023]
Abstract
Diabetic pregnancy, with ever increasing prevalence, adversely affects embryogenesis and increases vasculometabolic disorder risks in adult offspring. However, it remains poorly understood whether maternal diabetes increases the offspring's susceptibility to heart injuries in adulthood. In this study, we observed that cardiac function and structure were comparable between adult offspring born to diabetic mice and their counterparts born to nondiabetic mice at baseline. However, in response to myocardial ischemia/reperfusion (MIR), diabetic mother offspring exhibited augmented infarct size, cardiac dysfunction, and myocardial apoptosis compared with control, in association with exaggerated activation of mitochondria- and endoplasmic reticulum (ER) stress-mediated apoptosis pathways and oxidative stress. Molecular analysis showed that the impaired myocardial ischemic tolerance in diabetic mother offspring was mainly attributable to blunted cardiac insulin receptor substrate (IRS)-1/Akt signaling. Furthermore, the effect of maternal melatonin administration on offspring's response to MIR was determined, and the results indicated that melatonin treatment in diabetic dams during pregnancy significantly improved the tolerance to MIR injury in their offspring, via restoring cardiac IRS-1/Akt signaling. Taken together, these data suggest that maternal diabetes predisposes offspring to augmented MIR injury in adulthood, and maternal melatonin supplementation during diabetic pregnancy may hold promise for improving myocardial ischemic tolerance in the offspring.
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Affiliation(s)
- Ling Gao
- The International Peace Maternity and Child Health Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Yi-Chao Zhao
- Department of Cardiology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Yan Liang
- The International Peace Maternity and Child Health Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Xian-Hua Lin
- The International Peace Maternity and Child Health Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Ya-Jing Tan
- The International Peace Maternity and Child Health Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Dan-Dan Wu
- The International Peace Maternity and Child Health Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Xin-Zhu Li
- The International Peace Maternity and Child Health Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Bo-Zhi Ye
- Department of Cardiology, The First Affiliated Hospital, School of Medicine, Wenzhou Medical University, Wenzhou, China
| | - Fan-Qi Kong
- Department of Cardiology, The First Affiliated Hospital, School of Medicine, Wenzhou Medical University, Wenzhou, China
| | - Jian-Zhong Sheng
- The Key Laboratory of Reproductive Genetics, Ministry of Education (Zhejiang University), Hangzhou, China
- Department of Pathology and Pathophysiology, School of Medicine, Zhejiang University, Hangzhou, China
| | - He-Feng Huang
- The International Peace Maternity and Child Health Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China.
- The Key Laboratory of Reproductive Genetics, Ministry of Education (Zhejiang University), Hangzhou, China.
- Institute of Embryo-Fetal Original Adult Diseases, School of Medicine, Shanghai Jiao Tong University, Shanghai, China.
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He B, Zhao YC, Gao LC, Ying XY, Xu LW, Su YY, Ji QQ, Lin N, Pu J. Ubiquitin-Specific Protease 4 Is an Endogenous Negative Regulator of Pathological Cardiac Hypertrophy. Hypertension 2016; 67:1237-48. [PMID: 27045030 DOI: 10.1161/hypertensionaha.116.07392] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2016] [Accepted: 03/08/2016] [Indexed: 11/16/2022]
Abstract
Dysregulation of the ubiquitin proteasome system components ubiquitin ligases and proteasome plays an important role in the pathogenesis of cardiac hypertrophy. However, little is known about the role of another ubiquitin proteasome system component, the deubiquitinating enzymes, in cardiac hypertrophy. Here, we revealed a crucial role of ubiquitin specific protease 4 (USP4), a deubiquitinating enzyme prominently expressed in the heart, in attenuating pathological cardiac hypertrophy and dysfunction. USP4 levels were consistently decreased in human failing hearts and in murine hypertrophied hearts. Adenovirus-mediated gain- and loss-of-function approaches indicated that deficiency of endogenous USP4 promoted myocyte hypertrophy induced by angiotensin II in vitro, whereas restoration of USP4 significantly attenuated the prohypertrophic effect of angiotensin II. To corroborate the role of USP4 in vivo, we generated USP4 global knockout mice and mice with cardiac-specific overexpression of USP4. Consistent with the in vitro study, USP4 depletion exacerbated the hypertrophic phenotype and cardiac dysfunction in mice subjected to pressure overload, whereas USP4 transgenic mice presented ameliorated pathological cardiac hypertrophy compared with their control littermates. Molecular analysis revealed that USP4 deficiency augmented the activation of the transforming growth factor β–activated kinase 1 (TAK1)-(JNK1/2)/P38 signaling in response to hypertrophic stress, and blockage of TAK1 activation abolished the pathological effects of USP4 deficiency in vivo. These findings provide the first evidence for the involvement of USP4 in cardiac hypertrophy, and shed light on the therapeutic potential of targeting USP4 in the treatment of cardiac hypertrophy.
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Affiliation(s)
- Ben He
- From the Department of Cardiology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Yi-Chao Zhao
- From the Department of Cardiology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Ling-Chen Gao
- From the Department of Cardiology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Xiao-Ying Ying
- From the Department of Cardiology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Long-Wei Xu
- From the Department of Cardiology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Yuan-Yuan Su
- From the Department of Cardiology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Qing-Qi Ji
- From the Department of Cardiology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Nan Lin
- From the Department of Cardiology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Jun Pu
- From the Department of Cardiology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
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Ji YX, Zhang P, Zhang XJ, Zhao YC, Deng KQ, Jiang X, Wang PX, Huang Z, Li H. The ubiquitin E3 ligase TRAF6 exacerbates pathological cardiac hypertrophy via TAK1-dependent signalling. Nat Commun 2016; 7:11267. [PMID: 27249171 PMCID: PMC4895385 DOI: 10.1038/ncomms11267] [Citation(s) in RCA: 128] [Impact Index Per Article: 16.0] [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: 09/09/2015] [Accepted: 03/07/2016] [Indexed: 12/17/2022] Open
Abstract
Tumour necrosis factor receptor-associated factor 6 (TRAF6) is a ubiquitin E3 ligase that regulates important biological processes. However, the role of TRAF6 in cardiac hypertrophy remains unknown. Here, we show that TRAF6 levels are increased in human and murine hypertrophied hearts, which is regulated by reactive oxygen species (ROS) production. Cardiac-specific Traf6 overexpression exacerbates cardiac hypertrophy in response to pressure overload or angiotensin II (Ang II) challenge, whereas Traf6 deficiency causes an alleviated hypertrophic phenotype in mice. Mechanistically, we show that ROS, generated during hypertrophic progression, triggers TRAF6 auto-ubiquitination that facilitates recruitment of TAB2 and its binding to transforming growth factor beta-activated kinase 1 (TAK1), which, in turn, enables the direct TRAF6-TAK1 interaction and promotes TAK1 ubiquitination. The binding of TRAF6 to TAK1 and the induction of TAK1 ubiquitination and activation are indispensable for TRAF6-regulated cardiac remodelling. Taken together, we define TRAF6 as an essential molecular switch leading to cardiac hypertrophy in a TAK1-dependent manner.
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Affiliation(s)
- Yan-Xiao Ji
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan 430060, China.,Animal Experiment Center/Animal Biosafety Level-III Laboratory, Wuhan University, Wuhan 430060, China.,Medical Research Institute, School of Medicine, Wuhan University, Wuhan 430071, China
| | - Peng Zhang
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan 430060, China.,Animal Experiment Center/Animal Biosafety Level-III Laboratory, Wuhan University, Wuhan 430060, China.,Medical Research Institute, School of Medicine, Wuhan University, Wuhan 430071, China
| | - Xiao-Jing Zhang
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan 430060, China.,Animal Experiment Center/Animal Biosafety Level-III Laboratory, Wuhan University, Wuhan 430060, China.,Medical Research Institute, School of Medicine, Wuhan University, Wuhan 430071, China
| | - Yi-Chao Zhao
- Department of Cardiology, Shanghai Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai 200127, China
| | - Ke-Qiong Deng
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan 430060, China.,Animal Experiment Center/Animal Biosafety Level-III Laboratory, Wuhan University, Wuhan 430060, China.,Medical Research Institute, School of Medicine, Wuhan University, Wuhan 430071, China
| | - Xi Jiang
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan 430060, China.,Animal Experiment Center/Animal Biosafety Level-III Laboratory, Wuhan University, Wuhan 430060, China.,Medical Research Institute, School of Medicine, Wuhan University, Wuhan 430071, China
| | - Pi-Xiao Wang
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan 430060, China.,Animal Experiment Center/Animal Biosafety Level-III Laboratory, Wuhan University, Wuhan 430060, China.,Medical Research Institute, School of Medicine, Wuhan University, Wuhan 430071, China
| | - Zan Huang
- College of Life Science, Wuhan University, Wuhan 430072, China
| | - Hongliang Li
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan 430060, China.,Animal Experiment Center/Animal Biosafety Level-III Laboratory, Wuhan University, Wuhan 430060, China.,Medical Research Institute, School of Medicine, Wuhan University, Wuhan 430071, China
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15
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Gao L, Cao JT, Liang Y, Zhao YC, Lin XH, Li XC, Tan YJ, Li JY, Zhou CL, Xu HY, Sheng JZ, Huang HF. Calcitriol attenuates cardiac remodeling and dysfunction in a murine model of polycystic ovary syndrome. Endocrine 2016; 52:363-73. [PMID: 26578366 DOI: 10.1007/s12020-015-0797-1] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [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: 08/06/2015] [Accepted: 11/01/2015] [Indexed: 12/25/2022]
Abstract
Polycystic ovary syndrome (PCOS) is a complex reproductive and metabolic disorder affecting 10 % of reproductive-aged women, and is well associated with an increased prevalence of cardiovascular risk factors. However, there are few data concerning the direct association of PCOS with cardiac pathologies. The present study aims to investigate the changes in cardiac structure, function, and cardiomyocyte survival in a PCOS model, and explore the possible effect of calcitriol administration on these changes. PCOS was induced in C57BL/6J female mice by chronic dihydrotestosterone administration, as evidenced by irregular estrous cycles, obesity and dyslipidemia. PCOS mice progressively developed cardiac abnormalities including cardiac hypertrophy, interstitial fibrosis, myocardial apoptosis, and cardiac dysfunction. Conversely, concomitant administration of calcitriol significantly attenuated cardiac remodeling and cardiomyocyte apoptosis, and improved cardiac function. Molecular analysis revealed that the beneficial effect of calcitriol was associated with normalized autophagy function by increasing phosphorylation levels of AMP-activated protein kinase and inhibiting phosphorylation levels of mammalian target of rapamycin complex. Our findings provide the first evidence for the presence of cardiac remodeling in a PCOS model, and vitamin D supplementation may be a potential therapeutic strategy for the prevention and treatment of PCOS-related cardiac remodeling.
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Affiliation(s)
- Ling Gao
- The International Peace Maternity and Child Health Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200030, China
| | - Jia-Tian Cao
- Department of Cardiology, Shanghai Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200011, China
| | - Yan Liang
- The International Peace Maternity and Child Health Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200030, China
| | - Yi-Chao Zhao
- Department of Cardiology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127, China
| | - Xian-Hua Lin
- The International Peace Maternity and Child Health Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200030, China
| | - Xiao-Cui Li
- The International Peace Maternity and Child Health Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200030, China
| | - Ya-Jing Tan
- The International Peace Maternity and Child Health Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200030, China
| | - Jing-Yi Li
- Institute of Embryo-Fetal Original Adult Disease, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200030, China
- The Key Laboratory of Reproductive Genetics, Ministry of Education (Zhejiang University), Hangzhou, 310058, China
| | - Cheng-Liang Zhou
- The Key Laboratory of Reproductive Genetics, Ministry of Education (Zhejiang University), Hangzhou, 310058, China
| | - Hai-Yan Xu
- The Key Laboratory of Reproductive Genetics, Ministry of Education (Zhejiang University), Hangzhou, 310058, China
| | - Jian-Zhong Sheng
- The Key Laboratory of Reproductive Genetics, Ministry of Education (Zhejiang University), Hangzhou, 310058, China
- Department of Pathology and Pathophysiology, School of Medicine, Zhejiang University, Hangzhou, 310058, China
| | - He-Feng Huang
- The International Peace Maternity and Child Health Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200030, China.
- Institute of Embryo-Fetal Original Adult Disease, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200030, China.
- The Key Laboratory of Reproductive Genetics, Ministry of Education (Zhejiang University), Hangzhou, 310058, China.
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16
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Wang LM, Zhao YC, Peng P, Zhu CQ. Risk factors for postoperative recurrence of choledocholithiasis. Shijie Huaren Xiaohua Zazhi 2016; 24:300-304. [DOI: 10.11569/wcjd.v24.i2.300] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To idenfiy the risk factors for postoperative recurrence of choledocholithiasis to guide the therapy of this disease.
METHODS: In this retrospective study, 523 patients with choledocholithiasis who were admitted to our department from January 2002 to January 2007 were reviewed retrospectively. Factors that may influence postoperative choledocholithiasis recurrence were analyzed using the Cox's proportional hazards regression model.
RESULTS: The cumulative incidence of choledocholithiasis recurrence was 6.5% at 3 years, 9.5% at 5 years and 15.1% at 10 years after surgery. The postoperative recurrence did not significantly relate to the patient's gender, age, the number of stones, and the presence of cholecystolithiasis or not. The recurrence risk in cases with juxtapapillary duodenal diverticulum was 1.37 times as much as those without diverticulum (95%CI: 1.02-4.04, P < 0.05); the recurrence risk of cases with the common bile duct ≥ 15 mm in diameter was 2.16 times of those with a common bile duct diameter < 15 mm (95%CI: 1.12-5.08, P < 0.01). The recurrence risk in patients receiving endoscopic sphincterotomy (EST) was 2.2 times than those receiving traditional operations (95%CI: 1.13-6.87, P < 0.05).
CONCLUSION: Juxtapapillary duodenal diverticulum, common bile duct > 15 mm in diameter and EST could significantly increase the risk of postoperative choledocholithiasis recurrence.
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17
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Wang LM, Wang XY, Zhao YC, Peng P, Zhu CQ. Laparoscopic unroofing of liver cysts. Shijie Huaren Xiaohua Zazhi 2016; 24:267-271. [DOI: 10.11569/wcjd.v24.i2.267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
AIM: To explore the method of decreasing liver cyst recurrence after laparoscopic decompression.
METHODS: The clinical and postoperative follow-up data for 72 patients who underwent liver cyst surgery at Tangshan Worker Hospital were analyzed retrospectively. Efficacy of open surgery and laparoscopic liver cyst drainage for treatment of liver cysts was compared.
RESULTS: Compared with open surgery, laparoscopic liver cyst drainage had the advan-
tages of less pain and shorter hospitalization time. However, the liver cyst recurrence rate was 5/24 (20.1%) after drainage, which was higher than 3/48 (6.3%) after open surgery. Sodium hyaluronate could effectively reduce cyst recurrence after laparoscopic liver cyst drainage by preventing postoperative liver wound adhesions.
CONCLUSION: Laparoscopic liver cyst drainage is safe and feasible. Unroofing of the liver cyst as much as possible, using sclerosing agents rationally to inactivate residual cyst epithelial cells, and effective drainage on the premise of proper use of sodium hyaluronate and other anti-adhesion agents could effectively reduce cyst recurrence after laparoscopic surgery.
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18
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Zhang LQ, Zhao YC, Wang XW, Yang J, Lu ZW, Cheng YS. Primary localized tracheobronchial amyloidosis presenting with massive hemoptysis: a case report and literature review. Clin Respir J 2015; 11:122-125. [PMID: 25832552 DOI: 10.1111/crj.12301] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2014] [Revised: 02/02/2015] [Accepted: 03/23/2015] [Indexed: 11/28/2022]
Abstract
Primary localized tracheobronchial amyloidosis (TBA) is a rare respiratory tract dysfunction, which is a heterogeneous group of diseases involving abnormal extracellular deposition of amyloid and autologous fibrillar protein material in β-pleated sheets. A 64-year-old man was referred to our hospital because of hemoptysis. Physical examination showed decreased breath sounds in the right lung on auscultation. Chest computed tomography scan displayed multiple nodules with varied size in main bronchia around bilateral hilus of the lung. After admission, bronchoscopy was performed for this patient, and roughness of mucosa in trachea and multiple nodules in respiratory tract were observed. Through further tissue biopsy, the diagnosis of primary TBA was confirmed.
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Affiliation(s)
- Li-Qin Zhang
- The Department of Respiratory Medicine, Yijishan Hospital, Wannan Medical College, Wuhu, China
| | - Yi-Chao Zhao
- The Department of Respiratory Medicine, Yijishan Hospital, Wannan Medical College, Wuhu, China
| | - Xiao-Wei Wang
- The Department of Respiratory Medicine, Yijishan Hospital, Wannan Medical College, Wuhu, China
| | - Jian Yang
- The Department of Respiratory Medicine, Yijishan Hospital, Wannan Medical College, Wuhu, China
| | - Zhi-Wei Lu
- The Department of Respiratory Medicine, Yijishan Hospital, Wannan Medical College, Wuhu, China
| | - Yu-Sheng Cheng
- The Department of Respiratory Medicine, Yijishan Hospital, Wannan Medical College, Wuhu, China
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19
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Zhang Z, Zhao YC, Cheng Y, Jian GD, Pan MX, Gao Y. Hybrid bioartificial liver support in cynomolgus monkeys with D-galactosamine-induced acute liver failure. World J Gastroenterol 2014; 20:17399-17406. [PMID: 25516651 PMCID: PMC4265598 DOI: 10.3748/wjg.v20.i46.17399] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/03/2013] [Revised: 03/17/2014] [Accepted: 07/16/2014] [Indexed: 02/06/2023] Open
Abstract
AIM: To evaluate a hybrid bioartificial liver support system (HBALSS) in cynomolgus monkeys with acute liver failure.
METHODS: To establish a model of acute liver failure, 0.3 g/kg of D-galactosamine was injected intravenously into cynomolgus monkeys. Chinese human liver cells were introduced into a perfusion bioreactor to carry out hybrid bioartificial liver support treatment. Forty-eight hours after the injection, one group of cynomolgus monkeys received HBALSS care, and a second experimental group received no treatment. Clinical manifestations of all animals, survival time, liver and kidney functions and serum biochemistry changes were recorded. Simultaneous detection of the number, viability and function of hepatocytes in the hybrid bioartificial liver were also performed.
RESULTS: Forty-eight hours after the injection of D-galactosamine, serum biochemistry levels were significantly increased, whereas albumin levels and the Fischer index were significantly reduced compared to baseline (all Ps < 0.05). Of the ten monkeys in the HBALSS treatment group, five survived, with an average duration of survival of 128 ± 3 h. All cynomolgus monkeys in the control group died, with a duration of survival of 112 ± 2 h. Survival time was significantly longer with HBALSS treatment (P < 0.05). Moreover, the number, viability and function of hepatocytes were maintained at a high level with HBALSS.
CONCLUSION: The novel hybrid bioartificial liver plays a significant role in liver support by significantly reducing serum biochemistry levels and extending animal survival time.
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20
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Zhao YC, Pu J, He B. [Sumoylation regulates nuclear receptor function]. Sheng Li Ke Xue Jin Zhan 2013; 44:287-290. [PMID: 24228521] [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: 06/02/2023]
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21
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Zhang HY, Zhao YC, Qi JY. Treatment of biologically treated leachate by oxidation and coagulation. Water Sci Technol 2011; 64:1413-1418. [PMID: 22179637 DOI: 10.2166/wst.2011.377] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
This work aims to investigate removal efficiency of oxidation and coagulation/flocculation processes, to provide an effective method for the treatment of biologically pre-treated leachate. Leachate containing 985 mg L(-1) COD was treated by using three treatment schemes, i.e. oxidation, coagulation/flocculation and the combined process of coagulation/flocculation followed by oxidation. The application of single oxidation resulted in the effective removal of COD and color up to 80.4 and 83.2%, respectively. However, residual COD values lower than 200 mg L(-1) could only be achieved under intensive experimental conditions (high dosage of Ca(ClO)(2) and prolonged oxidation time). Coagulation/flocculation yielded residual COD values higher than 200 mg L(-1) even at the optimum coagulation conditions. The combined treatment by coagulation/flocculation followed by oxidation yielded final COD lower than 100 mg L(-1) at the following conditions: pre-coagulation with 250 mg L(-1) PFS (poly-ferric sulfate) and over 30-min post-oxidation, or pre-coagulation with 300 mg L(-1) PFS and over 20-min post-oxidation. Hence, pre-coagulation with PFS followed by oxidation with Ca(ClO)(2) was recommended for advanced treatment of biologically treated leachate.
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Affiliation(s)
- H Y Zhang
- Shanghai Institute of Technology, Shanghai, China.
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22
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Abstract
BACKGROUND To assess the response time and the details of the operating procedure of the Beijing 120 Emergency Medical Service (EMS). METHODS Between June and December 2005, 51 918 EMS cases recorded in the Dispatch Center of the Beijing Emergency Medical Center were analysed. RESULTS The median response time of the 51 918 cases was 16.5 min; the cumulative proportions were 2.28%, 9.64% and 18.04% for less than 5 min, 8 min and 10 min of response time respectively, whereas the proportion was 19.20% for more than 30 min of response time. CONCLUSIONS On the basis of this analysis, the response time of the Beijing 120 EMS system was found to be longer than that indicated by the national standards.
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Affiliation(s)
- J J Zhang
- Beijing Emergency Medical Center, Beijing, China.
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23
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Zhao YC, Rees SE, Andreassen S, Kjaergaard S. Simulation of pulmonary pathophysiology during spontaneous breathing. Conf Proc IEEE Eng Med Biol Soc 2008; 2005:6128-31. [PMID: 17281662 DOI: 10.1109/iembs.2005.1615892] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
This paper presents a functional model of lung mechanics including a non-linear alveolar pressure volume curve and representation of the work of respiratory muscles during breathing. The model is used to simulate the response to forced inspiration and expiration, and these simulations compared to the standard results of lung function tests routinely performed in departments of lung medicine. The model can simulate the characteristics of inspiratory and expiratory flow profiles seen in normal subjects, and in patients with obstructive or restrictive diseases.
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Affiliation(s)
- Y C Zhao
- Center for Model-based Medical Decision Support, Alborg University, Denmark
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24
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Tang P, Zhao YC, Chen DZ, Xia FY. Volatility of heavy metals during incineration of tannery sludge in the presence of chlorides and phosphoric acid. Waste Manag Res 2008; 26:369-376. [PMID: 18727329 DOI: 10.1177/0734242x08092024] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Knowledge of the behaviour of heavy metals in the combustion process is a most important factor in selecting disposal alternatives for waste materials. Accordingly, in this work, the vaporization behaviour of highly concentrated heavy metals (Pb, Zn, Cu and Cr) in tannery sludge were investigated experimentally. The sludge was spiked with various chlorine compounds (i.e. PVC, FeCl3, CaCl2 and NaCl) and pre-treated with phosphoric acid in order to evaluate the capacity of enhancement and weakening of the volatility of the heavy metals contained in tannery sludge. The experimental results show that the vaporization percentages increased with increasing ratio of Cl/sludge and temperature, and the accelerating and increasing effect of the addition of chlorides on the vaporization percentage of heavy metals was dependent on the release capacity of chlorine radicals. The vaporization percentages of lead and zinc increased by 15-20%, whereas those of copper and chromium increased by only about 3 and 10% at 800 degrees C. However, heavy metals were not expected to be completely released in the combustion process in spite of the high ratio of Cl/sludge. Alternately, heavy metals contained in tannery sludge can be immobilized effectively by pre-treatment with phosphoric acid. When the 85% phosphoric acid accounted for 10% of dry basis of tannery sludge, the phosphate-treated sludge showed the lowest vaporization percentage of about 3-15% with formation of Ca18Cu3(PO4)14, Ca9Cr(PO4)7, Ca19Zn2(PO4)14 and PbMgP2O7 in the bottom ash.
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Affiliation(s)
- P Tang
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Engineering, Tongji University, Shanghai, China.
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25
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Kuo ET, Ji ZL, Zhao YC, Zhang ML. Reconstruction of Metacarpophalangeal Joint by Free Vascularized Autogenous Metatarsophalangeal Joint Transplant. J Reconstr Microsurg 2008; 1:65-74. [PMID: 6544344 DOI: 10.1055/s-2007-1007057] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Six cases of autotransplantation of free vascularized second metatarsophalangeal joint to reconstruct damaged metacarpophalangeal (MP) joints are reported. Anatomical studies in cadaver and clinical cases involving the origin, course, and importance of preserving the articular branch of the metatarsal artery are described. Follow-up of cases from six months to 21/2 years postoperative reveal recovery of thumb function, stability of the transplanted joint, and no obvious degenerative changes.
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26
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Yu DS, Shi XZ, Wang HJ, Sun WX, Chen JM, Liu QH, Zhao YC. Regional patterns of soil organic carbon stocks in China. J Environ Manage 2007; 85:680-9. [PMID: 17126986 DOI: 10.1016/j.jenvman.2006.09.020] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2005] [Revised: 09/08/2006] [Accepted: 09/19/2006] [Indexed: 05/12/2023]
Abstract
Soil organic carbon (SOC) is of great importance in the global carbon cycle. Distribution patterns of SOC in various regions of China constitute a nation-wide baseline for studies on soil carbon changes. This paper presents an integrated and multi-level study on SOC stock patterns of China, and presents baseline SOC stock estimates by great administrative regions, river watersheds, soil type regions and ecosystem. The assignment is done by means of a recently completed 1: 1,000,000 scale soil database of China, which is the most detailed and reliable one in China at the present time. SOC densities of 7292 soil profiles collected across China in the middle of the 1980s were calculated and then linked to corresponding polygons in a digital soil map, resulting in a SOC Density Map of China on a 1: 1,000,000 scale, and a 1 km x 1 km grid map. Corresponding maps of administrative regions, river watersheds, soil types (ST), and ecosystems in China were also prepared with an identical resolution and coordinate control points, allowing GIS analyses. Results show that soils in China cover an area of 9.281 x 10(6)km(2) in total, with a total SOC stock of 89.14 Pg (1 Pg=10(15)g) and a mean SOC density of 96.0 t C/ha. Confidence limits of the SOC stock and density in China are estimated as [89.23 Pg, 89.08 Pg] and [96.143 t C/ha, 95.981 t C/ha] at 95% probability, respectively. The largest total SOC stock (23.60 Pg) is found in South-west China while the highest mean SOC density (181.9 t C/ha) is found in north-east China. The total SOC stock and the mean SOC density in the Yangtze river watershed are 21.05 Pg and 120.0 t C/ha, respectively, while the corresponding figures in the Yellow river watershed are 8.46 Pg and 104.3 t C/ha, respectively. The highest total SOC stocks are found in Inceptisols (34.39 Pg) with SOC density of 102.8 t C/ha. The lowest and highest mean SOC densities are found on Entisols (28.1 t C/ha), and on Histosols (994.728.1 t C/ha), respectively. Finally, the total SOC stock in shrub and forest ecosystem classes are 25.55 and 21.50 Pg, respectively; the highest mean SOC density (209.9 t C/ha) was recorded in the wetland ecosystem class and the lowest (29.0 t C/ha) in the desert ecosystem class. Among five forest ecosystem types, Evergreen conifer forest stores the highest SOC stock (6.81 Pg), and Deciduous conifer forest shows the highest SOC density (225.9 t C/ha). Figures of SOC stocks stratified by Administrative regions, river watersheds, soil types and ecosystem types presented in the study may constitute national-wide baseline for studies of SOC stock changes in various regions in the future.
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Affiliation(s)
- D S Yu
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China.
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27
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Cao XY, Yue QY, Song LY, Li M, Zhao YC. The performance and application of fly ash modified by PDMDAAC. J Hazard Mater 2007; 147:133-8. [PMID: 17293031 DOI: 10.1016/j.jhazmat.2006.12.056] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2006] [Revised: 12/19/2006] [Accepted: 12/19/2006] [Indexed: 05/13/2023]
Abstract
Fly ash modification by polydimethydiallylammonium chloride (PDMDAAC) in laboratory scale was explored in this work and the adsorption performance of modified fly ash and its application in dyeing wastewater treatment were also studied. The key factors (concentration and temperature) for PDMDAAC to affect the adsorption properties of fly ash (FA) were revealed using the orthogonal test with four factors. The results indicated that the adsorption magnitude of fly ash to PDMDAAC increased due to its favorable specific surface causing the change of the surface charge nature. Hence, adsorption performance of modified fly ash on organic molecules and its ion exchange capacity are strengthened. The maximum color removal efficiency was obtained as 88.2% by modified fly ash with 2.0 g/100 mL dosage in dyeing wastewater, which is much higher than 12.5% color removal efficiency by raw fly ash with the same dosage. And, the used modified fly ash could be used for cement production as additive agent. The intensity of cement produced with 15% the modified fly ash in weight reached the Chinese Cement Standard (GB/T17671-1999), blazing a promising novel way in fly ash utilization.
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Affiliation(s)
- X Y Cao
- School of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
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28
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Wang JX, Zhang LA, Li BX, Zhao YC, Wang ZQ, Zhang JY, Aoyama T. Cancer incidence and risk estimation among medical x-ray workers in China, 1950-1995. Health Phys 2002; 82:455-466. [PMID: 11906134 DOI: 10.1097/00004032-200204000-00004] [Citation(s) in RCA: 95] [Impact Index Per Article: 4.3] [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
Cancer incidence (1950-1995) among 27,011 medical diagnostic x-ray workers was compared by means of O/E system with that of 25,782 other medical specialists employed between 1950 and 1980 to provide evidence of human malignant tumors produced by protracted and fractionated exposure to ionizing radiation and to assess resultant cancer risk. Significant cancer risk was seen among diagnostic x-ray workers (RR = 1.2, 95% CI: 1.1-1.3). Significantly elevated risks were found for leukemia and cancers of skin, female breast, lung, liver, bladder, and esophagus; the RRs were 2.2, 4.1, 1.3, 1.2, 1.2, 1.8, and 2.7, respectively. The patterns of risk associated with years since beginning x-ray work and with age and calendar year of initial employment suggest that the excesses of leukemia, skin cancer, and female breast cancer-and possibly thyroid cancer-were related to occupational exposure to x rays. Because of a lack of individual dosimetry for Chinese medical x-ray workers (CMXW) before 1985, the dose was reconstructed by physical and biological retrospective dosimetry methods. The cancer risk of CMXW was estimated based on the reconstructed dose. The average cumulative dose for the earlier cohort (employed before 1970) was 551 mGy, and for the later cohort (employed from 1970 to 1980) it was 82 mGy. The RRs of leukemia and solid cancer were significantly high for the earlier cohort: 2.4 for leukemia, 1.2 for solid cancer. But no significant increase of RR was evident for the later cohort. The RR of leukemia was 1.7 and 1.1 for solid cancer. This means a significant cancer risk can be induced by long term fractionated exposure to ionizing radiation when the cumulative dose reaches a certain level.
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Affiliation(s)
- J X Wang
- Institute of Radiation Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjim.
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29
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Wang JX, Zhang LA, Li BX, Zhao YC, Gao ZW, Wang ZQ, Zhang JY. [Cancer risk assessment among medical X-ray workers in China]. Zhongguo Yi Xue Ke Xue Yuan Xue Bao 2001; 23:65-8, 72. [PMID: 12905823] [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: 03/04/2023]
Abstract
Cancer incidence(1950-1995) among 27,011 medical X-ray workers in comparison with 25,782 non X-ray medical specialists between 1950 and 1980 in China was investigated. The average cumulative dose received by the X-ray workers also reconstructed by retrospective dosimetry methods. Significant cancer risk was seen among medical X-ray workers(RR = 1.2). Significantly elevated risks were found in leukemia, cancer of skin, female breast, lung, liver, bladder and esophagus, the RRs were 2.2, 4.1, 1.3, 1.2, 1.2, 1.8 and 2.7 respectively. The patterns of cancer risk were associated with years since beginning of X-ray work, age and calendar year of initial employment and cumulative dose suggest that the risks of leukemia, skin cancer and female breast cancer, possibly thyroid cancer were related to occupational exposure to X-rays. A significant cancer risk could be induced by prolonged exposure to low dose ionizing radiation when the cumulative dose reached a certain level.
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Affiliation(s)
- J X Wang
- Department of Radiation Effects, Institute of Radiation Medicine, CAMS, PUMC, Tianjin 300192, China.
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30
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Zhao YC. [Quantitative determination of chlorogenic acid in eucommia leaf by high performance liquid chromatography]. Se Pu 2000; 18:263-4. [PMID: 12541571] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/28/2023] Open
Abstract
An HPLC method for the quantitative determination of chlorogenic acid in Eucommia leaf was investigated. The sample was extracted with methanol solution containing 5% fomic acid and then analyzed by HPLC. The operating conditions were Shim-pack CLC-ODS column (6.0 mm i.d. x 150 mm, 5 microns) at 40 degrees C, mobile phase of methanol-0.01 mol/L KH2PO4(25:75, V/V; pH 3.9) at 1 mL/min and UV detection at 328 nm. Mercaptopurine was selected as the internal standard. There was a good linear relationship between the response (area ratio of chlorogenic acid to mercaptopurine) and the concentration of sample in the range of 25-300 mg/L for chlorogenic acid. The corresponding regression equation was Y = 8.0368X + 0.001275, r = 0.9999. The average recovery was 99.89% and RSD was 1.45%(n = 6). The results showed that this method is simple, specific and accurate.
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Affiliation(s)
- Y C Zhao
- Zhaotong Institute for Drug Control, Zhaotong 657000, China.
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31
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Cao L, Zhao YC, Jiang ZH, Xu DH, Liu ZG, Chen SD, Liu XY, Zheng ZC. Long-term phenotypic correction of rodent hemiparkinsonism by gene therapy using genetically modified myoblasts. Gene Ther 2000; 7:445-9. [PMID: 10694827 DOI: 10.1038/sj.gt.3301096] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Rat myoblasts were genetically modified to express tyrosine hydroxylase (TH) and produce dopamine in culture. Implanting TH gene-transfected myoblasts into the denervated striatum of 6-OHDA-lesioned rats significantly decreased rotational asymmetry by 50 to approximately 60%. Improvement persisted for up to 13 months. Genetically modified cells could survive and express transgene in the striatum as demonstrated by RT-PCR and immunohistochemical stain-ing. The dopamine content in the striatum tissue of the gene therapy group recovered to 49% of the normal level and was 25-fold higher than that of a control group receiving parental cells. Neither tumor formation nor immunorejection was observed in this study. These results show that myoblasts may be useful as gene carriers for ex vivo gene therapy in the CNS. Gene Therapy (2000) 7, 445-449.
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Affiliation(s)
- L Cao
- Shanghai Institute of Biochemistry, Chinese Academy of Sciences, Shanghai, PR China
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32
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Jiang ZH, Ni ZM, Zhou CF, Cao L, Zheng ZC, Liu XY, Zhao YC, Chen SD. [Expression of foreign tyrosine hydroxylase gene in the rat model of Parkinson's disease]. Sheng Li Xue Bao 1997; 49:141-5. [PMID: 9812848] [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: 02/09/2023]
Abstract
A total of 75 adult rats were used to produce hemiparkinson's disease (PD) model by unilateral injection of 6-hydroxydopamine (6-OHDA) into the right substantial nigra. Four weeks following the lesions, rats were tested for apomorphine (APO) -induced asymmetric rotation. Only rats that showed more than seven turns per minute were selected as PD models for transplantation. A tyrosine hydroxylase expression plasmid (pSVK3-TH) mixed with lipofectin was transplanted into the right striatum of 15 PD rats. Another 20 PD rats transplanted either with lipofectin or with pSVK3-TH served as controls. Every three days following transplantation, the performance of asymmetric rotation were tested and stained with the TH-immunohistochemistry. Only the animals grafted with pSVK3-TH mixed with lipofectin were found to show the decreased rotational behavior and a few TH-positive cells in the right striatum at the postgraft day 3-12, but not day 18. The results indicate that there exists a correlation between amelioration of asymmetric rotation and the TH gene expression in the denervated striatum. It is suggested that the lipofectin may mediate foreign TH gene expression in the PD rat brain.
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Affiliation(s)
- Z H Jiang
- Shanghai Institute of Physiology, Chinese Academy of Sciences
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33
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Zhang L, Chen Y, Chen C, Wang H, Yan HZ, Zhao YC. [Analysis on current status of drinking water quality in rural areas of China]. Wei Sheng Yan Jiu 1997; 26:30-2. [PMID: 15747457] [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: 05/02/2023]
Abstract
An investigation on drinking water quality in rural areas of 180 counties in 26 provinces, municipalities and autonomous regions of China was carried out. The population surveyed was 89.39 million. 69.6% of which was supplied with ground water. Central water supply systems served 47.1% of population. Quality of drinking water was graded according to the "Guidelines for Implementation of the 'Sanitary Standard for Drinking Water' in Rural Areas". The rate of population supplied with unqualified drinking water was 42.7%. The bacteriological indices of drinking water exceeded the standard seriously. Organic pollution occurred extensively. Some regions supplied with water of high concentration of fluoride.
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Affiliation(s)
- L Zhang
- Institute of Environmental Health Monitoring, Chinese Academy of Preventive Medicine, Beijing 100021, China
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34
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Zhao YC, Porsch F, Holzapfel WB. Evidence for the occurrence of a prototype structure in Sc under pressure. Phys Rev B Condens Matter 1996; 54:9715-9720. [PMID: 9984703 DOI: 10.1103/physrevb.54.9715] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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35
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Cao L, Zheng ZC, Zhao YC, Jiang ZH, Liu ZG, Chen SD, Zhou CF, Liu XY. Gene therapy of Parkinson disease model rat by direct injection of plasmid DNA-lipofectin complex. Hum Gene Ther 1995; 6:1497-501. [PMID: 8573622 DOI: 10.1089/hum.1995.6.11-1497] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
Lipofectin-mediated gene transfer was used to introduce plasmid harboring the tyrosine hydroxylase (TH) gene into the striatum of rats with lesions of the nigrostriatal pathway. The rotational asymmetry of Parkinson disease model rat was reduced quickly and significantly, suggesting that plasmid-DNA-transfected brain cells can generate L-dopa locally in the striatum in quantities sufficient to compensate partially for the loss of intrinsic striatal dopaminergic input. Immunohistochemical staining and reverse transcription polymerase chain reaction (RT-PCR) also confirm that striatal cells can express exogenous TH gene. Such in vivo plasmid DNA transfer strategy may be useful in other neurologic disease therapy, especially acute brain insults.
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Affiliation(s)
- L Cao
- Shanghai Institute of Biochemistry, Academia Sinica, People's Republic of China
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36
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Zhao YC, Porsch F, Holzapfel WB. Determination of triple points in the phase diagram of praseodymium. Phys Rev B Condens Matter 1995; 52:134-137. [PMID: 9979584 DOI: 10.1103/physrevb.52.134] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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37
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Zhao YC, Porsch F, Holzapfel WB. Intermediate 4f bonding structure for samarium under pressure. Phys Rev B Condens Matter 1994; 50:6603-6608. [PMID: 9974613 DOI: 10.1103/physrevb.50.6603] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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38
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39
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Zhao YC, Shi AY. [Na+/H+ exchange and its significance in myocardial reperfusion injury]. Sheng Li Ke Xue Jin Zhan 1993; 24:234-7. [PMID: 8159993] [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: 01/29/2023]
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40
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Abstract
The preparation of this immunological latex consisted of the following steps: the synthesis of polystyrene, polynitrostyrene, polyaminostyrene and polystyrene diazonium salt latex. The quantities of emulsifier and initiator used in the synthesis of the polystyrene latex were much larger than those used in the conventional method. Reduction of the polynitrostyrene latex involved adding latex dropwise to a large excess of 6% sodium hydrosulphite-2 N potassium hydroxide solution with sodium lauryl benzene sulphonate as an emulsifier. When the mixture was heated at 70 degrees C for 4 h, the emulsion of polyaminostyrene was diazotized. The polystyrene diazonium salt latex obtained was capable of combining with 20-40% by weight of antibody protein. The immunopolystyrene diazonium latex reagents showed a positive agglutination reaction of 78-91% when mixed with serum from patients with leptospirosis and two other infectious diseases. The test, which can be completed within 3 min has been used to assay over 1200 patient samples.
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Affiliation(s)
- Y C Liu
- Fourth Military Medical University, Xian, China
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41
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Ma XH, Zhao YC, Sun SQ. [Reabsorptive action of collagen fibers of the liver]. Zhong Xi Yi Jie He Za Zhi 1988; 8:161-3, 134. [PMID: 3416399] [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: 01/05/2023]
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42
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Abstract
Electron diffraction technique for identifying structure types of martensite in beta-Hume-Rothery alloys is described. It includes determination of the stacking sequence of the martensite of the basal planes, differentiation of the long-range ordering in martensite inherited from its parent phase (A2 type disordered; B2 type ordered; and D03, or Heusler, type ordered), and distinguishing between normal-type and modified-type martensite. In addition to the 18R1-type martensite, 12R, 6R, and 2H martensites were found in quenched Cu-Zn-Al alloys using this technique.
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Affiliation(s)
- R H Wang
- Department of Physics, Wuhan University, People's Republic of China
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43
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Ma XH, Zhao YC, Yin L, Xu RL, Han DW, Wang MS. [Studies on the preventive and therapeutic effects of ursolic acid (UA) on acute hepatic injury in rats]. Yao Xue Xue Bao 1986; 21:332-5. [PMID: 3776541] [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: 01/07/2023]
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44
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Kuo ET, Ji ZL, Zhao YC, Lu V, Si XG, Lei XH, Huang Y. Microvascular free flap based on the medial femoral main cutaneous artery. J Reconstr Microsurg 1985; 1:305-8. [PMID: 4057170 DOI: 10.1055/s-2007-1007090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
This article introduces a free flap based on the medial femoral main cutaneous artery. Flap transfer was carried out in two cases with complete postoperative success. An anatomical description of the midportion of the medial femoral region, based on magnification and binocular dissection microscope studies is provided, and the operative procedure is described.
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45
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Zhao YC. [Pilonidal sinus associated with intraspinal dermoid or epidermoid cyst in children]. Zhonghua Shen Jing Jing Shen Ke Za Zhi 1984; 17:346-7. [PMID: 6543720] [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: 04/05/2023]
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46
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Su XS, Chen HM, Wang LH, Jiang CF, Liu JH, Zhao MQ, Ma XH, Zhao YC, Han DW. Clinical and laboratory observation on the effect of glycyrrhizin in acute and chronic viral hepatitis. J TRADIT CHIN MED 1984; 4:127-32. [PMID: 6567725] [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: 04/05/2023]
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47
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Zhao MQ, Han DW, Ma XH, Zhao YC, Yin L, Li CM. [Preventive and therapeutic actions of glycyrrhizin, glycyrrhetic acid and crude saikosides on experimental liver cirrhosis in rats]. Yao Xue Xue Bao 1983; 18:325-31. [PMID: 6637483] [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: 01/21/2023]
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48
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Han DW, Ma XH, Zhao YC, Yin L, Ji CX. Studies on the preventive action of oleanolic acid on experimental cirrhosis. J TRADIT CHIN MED 1982; 2:83-90. [PMID: 6765707] [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: 01/21/2023]
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49
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Ma XH, Zhao YC, Yin L, Han DW, Ji CX. [Studies on the effect of oleanolic acid on experimental liver injury (author's transl)]. Yao Xue Xue Bao 1982; 17:93-7. [PMID: 7102327] [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: 01/23/2023]
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