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Wei XZ, Gao K, Zhang J, Zhao B, Liu ZG, Wu RQ, Ou MM, Zhang Q, Li W, Cheng Q, Xie YL, Zhang TY, Li YJ, Wang H, Wang ZM, Zhang W, Zhou J. [Effect of preemptive analgesia with ibuprofen on postoperative pain after mandibular third molar extraction: a randomized controlled trial]. Zhonghua Kou Qiang Yi Xue Za Zhi 2024; 59:230-236. [PMID: 38432654 DOI: 10.3760/cma.j.cn112144-20231203-00276] [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: 03/05/2024]
Abstract
Objective: To evaluate the impact of preemptive analgesia with ibuprofen on postoperative pain following the extraction of impacted mandibular third molars in a Chinese population, aiming to provide a clinical reference for its application. Methods: This multicenter, randomized, double-blind, placebo-controlled parallel-group trial was conducted from April 2022 to October 2023 at the Capital Medical University School of Stomatology (40 cases), Beijing TianTan Hospital, Capital Medical University (22 cases), and Beijing Chao-Yang Hospital, Capital Medical University (20 cases). It included 82 patients with impacted mandibular third molars, with 41 in the ibuprofen group and 41 in the control group. Participants in the ibuprofen group received 300 mg of sustained-release ibuprofen capsules orally 15 min before surgery, while the control group received a placebo. Both groups were instructed to take sustained-release ibuprofen capsules as planned for 3 days post-surgery. Pain intensity was measured using the numerical rating scale at 30 min, 4 h, 6 h, 8 h, 24 h, 48 h, and 72 h after surgery, and the use of additional analgesic medication was recorded during days 4 to 6 postoperatively. Results: All 82 patients completed the study according to the protocol. No adverse events such as nausea, vomiting, or allergies were reported in either group during the trial. The ibuprofen group exhibited significantly lower pain scores at 4 h [2.0 (1.0, 4.0) vs. 4.0 (3.0, 5.0)] (Z=-3.73, P<0.001), 6 h [2.0 (1.0, 4.0) vs. 5.0(2.5, 6.0)] (Z=-3.38, P<0.001), and 8 h [2.0 (1.0, 4.0) vs. 5.0 (2.0, 6.0)] (Z=-2.11, P=0.035) postoperatively compared to the control group. There were no statistically significant differences in pain scores between the groups at 30 min, 24 h, 48 h, and 72 h postoperatively (P>0.05). Additionally, 11 out of 41 patients (26.8%) in the ibuprofen group and 23 out of 41 patients (56.1%) in the control group required extra analgesic medication between days 4 and 6 post-surgery, with the ibuprofen group taking significantly fewer additional pills [0.0 (0.0, 1.0) vs. 1.0 (0.0, 3.0)] (Z=-2.81, P=0.005). Conclusions: A pain management regimen involving 300 mg of oral sustained-release ibuprofen capsules administered 15 minutes before surgery and continued for 3 d postoperatively effectively reduces pain levels and the total amount of analgesic medication used after the extraction of impacted mandibular third molars. Considering its efficacy, safety, and cost-effectiveness, ibuprofen is recommended as a first-line drug for perioperative pain management, enhancing patient comfort during diagnosis and treatment in a feasible manner.
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Affiliation(s)
- X Z Wei
- Department of Emergency and General Dentistry, Capital Medical University School of Stomatology, Beijing 100050, China
| | - K Gao
- Department of VIP Dental Service, Capital Medical University School of Stomatology, Beijing 100050, China
| | - J Zhang
- Department of Oral Maxillofacial Surgery, Capital Medical University School of Stomatology, Beijing 100050, China
| | - B Zhao
- Department of Pharmacy, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Z G Liu
- Statistics Department, Pharmacology Base, Beijing Anzhen Hospital, Capital Medical University, Beijing 100011, China
| | - R Q Wu
- Department of Stomatology, Beijing TianTan Hospital, Capital Medical University, Beijing 100070, China
| | - M M Ou
- Department of Stomatology, Beijing TianTan Hospital, Capital Medical University, Beijing 100070, China
| | - Q Zhang
- Department of Stomatology, Beijing TianTan Hospital, Capital Medical University, Beijing 100070, China
| | - W Li
- Department of Stomatology, Beijing Chao-Yang Hospital, Capital Medical University, Beijing 100020, China
| | - Q Cheng
- Department of Stomatology, Beijing Chao-Yang Hospital, Capital Medical University, Beijing 100020, China
| | - Y L Xie
- Department of Stomatology, Beijing Chao-Yang Hospital, Capital Medical University, Beijing 100020, China
| | - T Y Zhang
- Department of VIP Dental Service, Capital Medical University School of Stomatology, Beijing 100050, China
| | - Y J Li
- Department of VIP Dental Service, Capital Medical University School of Stomatology, Beijing 100050, China
| | - H Wang
- Department of Stomatology, Beijing TianTan Hospital, Capital Medical University, Beijing 100070, China
| | - Z M Wang
- Department of Stomatology, Beijing Chao-Yang Hospital, Capital Medical University, Beijing 100020, China
| | - W Zhang
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology & National Center for Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China
| | - J Zhou
- Department of VIP Dental Service, Capital Medical University School of Stomatology, Beijing 100050, China
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Wang YZ, Zhang TY, Dong J, Chen P, Yu GQ, Wan CH, Han XF. Voltage-Controlled Magnon Transistor via Tuning Interfacial Exchange Coupling. Phys Rev Lett 2024; 132:076701. [PMID: 38427900 DOI: 10.1103/physrevlett.132.076701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Revised: 09/28/2023] [Accepted: 01/11/2024] [Indexed: 03/03/2024]
Abstract
Magnon transistors that can effectively regulate magnon transport by an electric field are desired for magnonics, which aims to provide a Joule-heating free alternative to the conventional electronics owing to the electric neutrality of magnons (the key carriers of spin-angular momenta in the magnonics). However, also due to their electric neutrality, magnons have no access to directly interact with an electric field and it is thus difficult to manipulate magnon transport by voltages straightforwardly. Here, we demonstrated a gate voltage (V_{g}) applied on a nonmagnetic metal and magnetic insulator (MI) interface that bent the energy band of the MI and then modulated the probability for conduction electrons in the nonmagnetic metal to tunnel into the MI, which can consequently enhance or weaken the spin-magnon conversion efficiency at the interface. A voltage-controlled magnon transistor based on the magnon-mediated electric current drag (MECD) effect in a Pt-Y_{3}Fe_{5}O_{12}-Pt sandwich was then experimentally realized with V_{g} modulating the magnitude of the MECD signal. The obtained efficiency (the change ratio between the MECD voltage at ±V_{g}) reached 10%/(MV/cm) at 300 K. This prototype of magnon transistor offers an effective scheme to control magnon transport by a gate voltage.
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Affiliation(s)
- Y Z Wang
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - T Y Zhang
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, China
| | - J Dong
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, China
| | - P Chen
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, China
| | - G Q Yu
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, China
- Songshan Lake Materials Laboratory, Dongguan, Guangdong 523808, China
| | - C H Wan
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, China
- Songshan Lake Materials Laboratory, Dongguan, Guangdong 523808, China
| | - X F Han
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
- Songshan Lake Materials Laboratory, Dongguan, Guangdong 523808, China
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Hao R, Wang YC, Zhang TY, Liu Y, Niu R, Yin Z, Zhang W. [Clinical characteristics and surgical outcomes in pediatric progressive restrictive strabismus]. Zhonghua Yan Ke Za Zhi 2024; 60:35-42. [PMID: 38199766 DOI: 10.3760/cma.j.cn112142-20231031-00199] [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: 01/12/2024]
Abstract
Objective: To investigate the clinical features, imaging manifestations, histopathological characteristics, and surgical outcomes in pediatric progressive restrictive strabismus. Methods: A retrospective case series study was conducted, including data from 9 cases (9 eyes) of pediatric progressive restrictive strabismus treated at Tianjin Eye Hospital from June 2017 to October 2022. The study compared the degree of globe protrusion in both eyes, changes in eyelid fissure height during internal and external rotation in the primary gaze, summarized clinical characteristics, and analyzed intraoperative conditions, surgical outcomes and postoperative histopathological results of strabismus correction surgery. Statistical analysis was performed using Wilcoxon signed-rank test and Friedman two-way analysis of variance. Results: All 9 cases involved unilateral onset, with 4 males and 5 females. Three cases affected the right eye, and six affected the left eye. Onset age ranged from 2 to 40 months. The degree of globe protrusion in the affected eyes was 13.00 (12.00, 13.00) mm for the right eye and 12.00 (12.00, 13.50) mm for the left eye, with no statistically significant difference (Z=-1.00, P=0.317). There were no significant changes in eyelid fissure height during internal rotation [8.00 (7.25, 8.00) mm], primary gaze [7.50 (7.00, 8.00) mm], and external rotation [8.00 (7.75, 8.00) mm] in the affected eyes (χ²=1.00, P=0.607). No apparent abnormalities were observed in head CT or MRI scans, serum, or immunological tests. However, orbital CT or MRI scans indicated thickening of different extraocular muscle bellies. Six out of nine cases underwent strabismus correction surgery, and postoperative examination revealed restriction in eye movement despite achieving orthophoria in the primary gaze. Tissue pathology of three cases showed increased collagen fiber proliferation in one, scattered bundles of smooth muscle fibers amid diffuse collagen fiber proliferation in another, and abnormal proliferation of striated muscle fibers with varying diameters, increased paired box (PAX)7-positive satellite cells expressing slow muscle myosin in the third case. Conclusions: Pediatric progressive restrictive strabismus presents with restrictive changes, without significant alterations in globe protrusion and eyelid fissure height. Imaging examinations reveal thickening of the extraocular muscle bellies in the affected eye. Although strabismus correction surgery improves eye position, postoperative eye movement remains restricted. Histopathological findings in some cases show abnormal proliferation of skeletal muscle fibers or collagen fibers.
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Affiliation(s)
- R Hao
- Tianjin Eye Hospital, Nankai University Affiliated Eye Hospital, Clinical College of Ophthalmology of Tianjin Medical University, Tianjin Eye Institute, Tianjin Key Laboratory of Ophthalmology and Visual Science, Tianjin 300020, China
| | - Y C Wang
- Tianjin Eye Hospital, Nankai University Affiliated Eye Hospital, Clinical College of Ophthalmology of Tianjin Medical University, Tianjin Eye Institute, Tianjin Key Laboratory of Ophthalmology and Visual Science, Tianjin 300020, China
| | - T Y Zhang
- Tianjin Eye Hospital, Nankai University Affiliated Eye Hospital, Clinical College of Ophthalmology of Tianjin Medical University, Tianjin Eye Institute, Tianjin Key Laboratory of Ophthalmology and Visual Science, Tianjin 300020, China
| | - Y Liu
- Tianjin Eye Hospital, Nankai University Affiliated Eye Hospital, Clinical College of Ophthalmology of Tianjin Medical University, Tianjin Eye Institute, Tianjin Key Laboratory of Ophthalmology and Visual Science, Tianjin 300020, China
| | - R Niu
- Tianjin Eye Hospital, Nankai University Affiliated Eye Hospital, Clinical College of Ophthalmology of Tianjin Medical University, Tianjin Eye Institute, Tianjin Key Laboratory of Ophthalmology and Visual Science, Tianjin 300020, China
| | - Z Yin
- Tianjin Eye Hospital, Nankai University Affiliated Eye Hospital, Clinical College of Ophthalmology of Tianjin Medical University, Tianjin Eye Institute, Tianjin Key Laboratory of Ophthalmology and Visual Science, Tianjin 300020, China
| | - W Zhang
- Tianjin Eye Hospital, Nankai University Affiliated Eye Hospital, Clinical College of Ophthalmology of Tianjin Medical University, Tianjin Eye Institute, Tianjin Key Laboratory of Ophthalmology and Visual Science, Tianjin 300020, China
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Zhang TY, Sun X, Yao YH, Jin Q, Gan DN, Ye YA, Li XK. [Update points for the 2022 edition of the European Association for the Study of Liver Diseases Clinical Practice Guidelines for the Management of Hepatic Encephalopathy and comparison with China's 2018 edition guidelines]. Zhonghua Gan Zang Bing Za Zhi 2023; 31:921-927. [PMID: 37872087 DOI: 10.3760/cma.j.cn501113-20221111-00560] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 10/25/2023]
Abstract
The European Association for the Study of Liver Diseases issued the "Clinical Practice Guidelines for the Management of Hepatic Encephalopathy" in 2022, which included recommendations for clinical diagnosis, assessment, treatment, management, and prevention. The Society's "Hepatic Encephalopathy Clinical Practice Guidelines in Chronic Liver Disease," which was last published in 2014, and the "Guidelines for the Diagnosis and Treatment of Hepatic Encephalopathy in Cirrhosis," which the Chinese Society of Hepatology, Chinese Medical Association, released in 2018, have certain differences and updates in terms of comparison to terminology, grading and classification, diagnosis, clinical evaluation and treatment, management, and prevention. Herein, the updated points of this guideline and the differences between it and our nation's guidelines are summarized in order to refine and understand the guiding role of the new version of the guideline for the clinical treatment of hepatic encephalopathy and provide aid for standardizing clinical diagnosis and treatment.
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Affiliation(s)
- T Y Zhang
- Department of Gastroenterology, Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing 100700, China
| | - X Sun
- Department of Gastroenterology, Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing 100700, China
| | - Y H Yao
- Department of Gastroenterology, Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing 100700, China
| | - Q Jin
- Department of Gastroenterology, Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing 100700, China
| | - D N Gan
- Department of Gastroenterology, Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing 100700, China Liver Diseases Academy of TCM, Beijing University of Chinese Medicine, Beijing 100700, China
| | - Y A Ye
- Department of Gastroenterology, Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing 100700, China Liver Diseases Academy of TCM, Beijing University of Chinese Medicine, Beijing 100700, China
| | - X K Li
- Department of Gastroenterology, Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing 100700, China Liver Diseases Academy of TCM, Beijing University of Chinese Medicine, Beijing 100700, China
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Zhang TY. [A biography of infectious diseases: Hans Zinsser and his Rats, Lice and History]. Zhonghua Yi Shi Za Zhi 2022; 52:185-192. [PMID: 35775274 DOI: 10.3760/cma.j.cn112155-20211227-00154] [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
Hans Zinsser, a well-known bacteriologist and immunologist in the United States in the early 20th century, made great advancement in the research of pathogen of typhus and its vaccine, with the epidemic typhus renamed after him. His masterpiece, Rats, Lice and History, teased out the co-evolutionary process of infectious diseases and their related organisms, focusing on specific cases and the development history of typhus. In this sense, he revealed the tremendous impact of infectious diseases on human history. He examined microorganisms and humans equally rather than simply from a human point of view. He analysed the pathological features of infectious diseases and provided professional insights into historical events of infectious diseases, such as the origin of syphilis and the plague of Athens, based on sufficient citations and references. He also advocated interpreting the history of infectious diseases with a holistic insight of history. His book, Rats, Lice and History, has been reprinted many times after its first publication, driving the following scholars to put the history of infectious diseases into a grand background of human development, enhancing the comprehension of ecology and politics and promoting the development of research in the history of diseases including life sciences, history and other disciplines.
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Affiliation(s)
- T Y Zhang
- University of Chinese Academy of Sciences, Beijing 100049, China Institute for the History of Natural Sciences, CAS, Beijing 100190, China
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Li CL, Xie YZ, Zhu YY, Fu YY, Zhang TY. [Using the external auditory canal skin graft of the healthy side to treat unilateral congenital aural atresia: preliminary results of clinical research]. Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2022; 57:338-344. [PMID: 35325947 DOI: 10.3760/cma.j.cn115330-20211117-00744] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Objective: To investigate whether the contralateral normal external auditory canal (EAC) skin graft can maintain the ear canal health after EAC reconstruction in unilateral congenital aural atresia (CAA) cases. Methods: A Zelen design randomized controlled study was used to collect unilateral CAA patients for EAC reconstruction prospectively (clinical trial registration number: ChiCTR2000032103). The patients were randomly divided into the control group and the trial group. The trial group used the contralateral normal EAC skin graft group (transplant part of the contralateral normal EAC skin to repair the atresia side for unilateral CAA patients), the control group all used scalp blade thick skin. We observed the EAC health and hearing results of the two groups after EAC reconstruction. Results: A total of 13 cases were enrolled from July 2020 to August 2021. There were eight patients in the trial group, including six males and two females, with an average age of 22.3 years (14-36 years). There were two patients with CAA on the left and six patients on the right. The average follow-up time was 8.8 months (4-14 months). There were five patients in the control group, all cases were male with an average age of 16.2 years (12-20 years). There were four patients with CAA on the left and one patient on the right. The average follow-up time was 7.0 months (2-14 months). In the trial group, eight cases of reconstructed EAC epithelium were healthy, one patient had cicatricial stenosis of EAC opening and lateralization of the tympanic membrane. The other patient had cicatricial stenosis of reconstructed EAC, this case also had scar hyperplasia of the contralateral EAC opening but recovered after soft packing and triamcinolone acetonide injection treatment. The healthy side EAC of the rest trial group had no scarring stenosis or local bone hyperplasia during long-term follow-up. In the control group, one patient was lost to follow-up and the other four patients had dry ears of reconstructed EAC, but easily to form crusts and needed to be cleaned repeatedly, one patient had lateralization of the tympanic membrane, the EAC epithelium was not healthy for long-term follow-up. The incidence of complications related to EAC reconstruction was lower than previous studies (χ²=5.55, P=0.018), and the average postoperative Air-Bone Gap increased (18.8±10.0)dB. Conclusion: By optimizing the EAC reconstruction technology, the health of the reconstructed EAC is improved compared with the previous study. After active intervention and treatment, there should be no scarring stenosis or local bone hyperplasia on the contralateral side EAC.
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Affiliation(s)
- C L Li
- Department of Facial Plastic and Reconstructive Surgery, ENT institute, Eye & ENT Hospital, NHC Key Laboratory of Hearing Medicine (Fudan University), Shanghai 200031, China
| | - Y Z Xie
- Department of Facial Plastic and Reconstructive Surgery, ENT institute, Eye & ENT Hospital, NHC Key Laboratory of Hearing Medicine (Fudan University), Shanghai 200031, China
| | - Y Y Zhu
- Department of Facial Plastic and Reconstructive Surgery, ENT institute, Eye & ENT Hospital, NHC Key Laboratory of Hearing Medicine (Fudan University), Shanghai 200031, China
| | - Y Y Fu
- Department of Facial Plastic and Reconstructive Surgery, ENT institute, Eye & ENT Hospital, NHC Key Laboratory of Hearing Medicine (Fudan University), Shanghai 200031, China
| | - T Y Zhang
- Department of Facial Plastic and Reconstructive Surgery, ENT institute, Eye & ENT Hospital, NHC Key Laboratory of Hearing Medicine (Fudan University), Shanghai 200031, China
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Zhang LX, Zhang B, Liu XY, Wang ZM, Qi P, Zhang TY, Zhang Q. Advances in the treatment of secondary and tertiary hyperparathyroidism. Front Endocrinol (Lausanne) 2022; 13:1059828. [PMID: 36561571 PMCID: PMC9763452 DOI: 10.3389/fendo.2022.1059828] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [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: 10/02/2022] [Accepted: 11/23/2022] [Indexed: 12/12/2022] Open
Abstract
Secondary hyperparathyroidism (SHPT) and tertiary hyperparathyroidism (THPT) are common and complicated clinical endocrine diseases. The parathyroid glands maintain endocrine homeostasis by secreting parathyroid hormone to regulate blood calcium levels. However, structural alterations to multiple organs and systems occur throughout the body due to hyperactivity disorder in SHPT and THPT. This not only decreases the patients' quality of life, but also affects mortality. Since current treatments for these diseases remains unclear, we aimed to develop a comprehensive review of advances in the treatment of SHPT and THPT according to the latest relevant researches.
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Affiliation(s)
- Li-Xi Zhang
- Thyroid Surgery Department, General Surgery Center, First Hospital of Jilin University, Changchun, China
| | - Ben Zhang
- Thyroid Surgery Department, General Surgery Center, First Hospital of Jilin University, Changchun, China
| | - Xu-Yao Liu
- Thyroid Surgery Department, General Surgery Center, First Hospital of Jilin University, Changchun, China
| | - Zi-Ming Wang
- Thyroid Surgery Department, General Surgery Center, First Hospital of Jilin University, Changchun, China
| | - Peng Qi
- Thyroid Surgery Department, General Surgery Center, First Hospital of Jilin University, Changchun, China
| | - Tong-Yue Zhang
- Thyroid Surgery Department, General Surgery Center, First Hospital of Jilin University, Changchun, China
| | - Qiang Zhang
- Thyroid Surgery Department, General Surgery Center, First Hospital of Jilin University, Changchun, China
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Shi CX, Lv XL, Wu LH, Liu MY, He L, Zhang TY, Qiao YY, Hao JF, Wang G, Cui YY, Qu HX, Zhang CM, Yang GL, Zhang JL, Kang XT, Han JC. High Doses of Phytase Alleviate the Negative Effects of Calcium and Phosphorus Imbalance on Growth Performance and Bone Mineralization in Broiler Chickens. Braz J Poult Sci 2022. [DOI: 10.1590/1806-9061-2021-1568] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- CX Shi
- Henan Agricultural University, China; Shangqiu Normal University, China
| | - XL Lv
- Henan Agricultural University, China; Shangqiu Normal University, China
| | - LH Wu
- Henan Agricultural University, China; Shangqiu Normal University, China
| | - MY Liu
- Henan Agricultural University, China; Shangqiu Normal University, China
| | - L He
- Shangqiu Normal University, China; Henan Normal University, China
| | | | - YY Qiao
- Sumy National Agrarian University, Ukraine
| | - JF Hao
- Shangqiu Normal University, China
| | - G Wang
- Shangqiu Normal University, China
| | - YY Cui
- Shangqiu Normal University, China
| | - HX Qu
- Shangqiu Normal University, China
| | - CM Zhang
- Shangqiu Normal University, China
| | - GL Yang
- Shangqiu Normal University, China
| | - JL Zhang
- Shangqiu Normal University, China
| | - XT Kang
- Henan Agricultural University, China
| | - JC Han
- Shangqiu Normal University, China
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Bao HD, Shu SB, Zhang TY, Zhang X, Gu Q, Jing WT, Liu Z, Wang B, Qiu Y, Zhu ZZ. [Clinical study of selection of the upper instrumented vertebra at one level caudal to upper end vertebra in patients with Lenke 5C adolescent idiopathic scoliosis]. Zhonghua Yi Xue Za Zhi 2021; 101:2772-2777. [PMID: 34551493 DOI: 10.3760/cma.j.cn112137-20201231-03526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate whether the upper instrumented vertebra (UIV) can be selected at one level caudal to upper end vertebra (UEV) in Lenke type 5C adolescent idiopathic scoliosis (AIS) patients. Methods: Total of 28 Lenke 5C AIS patients who underwent selective posterior fusion in Drum Tower Hospital of Nanjing University Medical School from September 2013 to September 2015 were included. There were 4 males and 24 females, with an age of (15.0±2.0) years, the Risser sign was graded 2-5. The following imaging parameters were measured on standing full spine X-ray before, immediately after the surgery and at the last follow-up: thoracolumbar/lumbar (TL/L) Cobb angle, coronal balance, UIV translation, lower instrumented vertebra (LIV) translation, UIV tilt, LIV tilt, and thoracic apical vertebral translation (T-AVT), lumbar apical vertebral translation (L-AVT). The patients were divided into two groups: decompensation group (n=6) and non-decompensation group (n=22). Radiographic parameters and Scoliosis Research Society (SRS)-22 scores were compared between the two groups. Results: Six cases (21.4%) had proximal decompensation at the last follow-up. There were no significant differences in Risser grade(3.8±1.0 vs 3.6±1.6), baseline thoracic Cobb angle(25.8°±2.2° vs 26.3°±6.4°) and TL/L Cobb angle(43.7°±3.4° vs 45.2°±6.5°) between the two groups (all P>0.05). However, the baseline lumbar/thoracic apical vertebra translation (L-T AVT ratio) was significantly higher in patients with proximal decompensation (6.3±1.3 vs 4.0±2.0, P=0.048). Conclusion: Selecting UIV at one level caudal to UEV, would not increase the incidence of proximal decompensation in Lenke 5C AIS patients with Risser higher than grade 2, the smaller baseline L-T AVT ratio, and with thoracic compensatory curve over 15°, and can obtain satisfactory clinical results.
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Affiliation(s)
- H D Bao
- Spine Surgery, Drum Tower Hospital of Nanjing University Medical School, Nanjing 210008, China
| | - S B Shu
- Spine Surgery, Drum Tower Hospital of Nanjing University Medical School, Nanjing 210008, China
| | - T Y Zhang
- Spine Surgery, Drum Tower Hospital of Nanjing University Medical School, Nanjing 210008, China
| | - X Zhang
- Spine Surgery, Drum Tower Hospital of Nanjing University Medical School, Nanjing 210008, China
| | - Q Gu
- Spine Surgery, Drum Tower Hospital of Nanjing University Medical School, Nanjing 210008, China
| | - W T Jing
- Spine Surgery, Drum Tower Hospital of Nanjing University Medical School, Nanjing 210008, China
| | - Z Liu
- Spine Surgery, Drum Tower Hospital of Nanjing University Medical School, Nanjing 210008, China
| | - B Wang
- Spine Surgery, Drum Tower Hospital of Nanjing University Medical School, Nanjing 210008, China
| | - Y Qiu
- Spine Surgery, Drum Tower Hospital of Nanjing University Medical School, Nanjing 210008, China
| | - Z Z Zhu
- Spine Surgery, Drum Tower Hospital of Nanjing University Medical School, Nanjing 210008, China
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Zhang TY, Fu YY, Guo Y, Li CL. [The upadate classification system of congenital auricular malformation]. Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2021; 56:871-875. [PMID: 34521176 DOI: 10.3760/cma.j.cn115330-20210320-00139] [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)
- T Y Zhang
- Department of Facial Plastic and Reconstructive Surgery, ENT Institute, Eye & ENT Hospital, NHC Key Laboratory of Hearing Medicine (Fudan University), Shanghai 200031, China
| | - Y Y Fu
- Department of Facial Plastic and Reconstructive Surgery, ENT Institute, Eye & ENT Hospital, NHC Key Laboratory of Hearing Medicine (Fudan University), Shanghai 200031, China
| | - Y Guo
- Department of Facial Plastic and Reconstructive Surgery, ENT Institute, Eye & ENT Hospital, NHC Key Laboratory of Hearing Medicine (Fudan University), Shanghai 200031, China
| | - C L Li
- Department of Facial Plastic and Reconstructive Surgery, ENT Institute, Eye & ENT Hospital, NHC Key Laboratory of Hearing Medicine (Fudan University), Shanghai 200031, China
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Bao HD, Zhang TY, Shu SB, Liu Z, Sun X, Wang B, Qian BP, Yu Y, Qiu Y, Zhu ZZ. [Occurrence of rod fracture and salvage methods after primary surgery of the congenital lumbosacral deformity associated with sacral agenesis]. Zhonghua Yi Xue Za Zhi 2021; 101:1560-1565. [PMID: 34098682 DOI: 10.3760/cma.j.cn112137-20201019-02868] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To analyze the occurrence of rod fracture after surgery for lumbosacral deformity associated sacral agenesis and discuss the relevant salvage methods. Methods: The clinical records of 19 patients who underwent surgical treatment for lumbosacral deformity associated sacral agenesis from January 2001 to January 2018 were retrospectively reviewed, including 11 boys and 8 girls. The average age was (9.6±5.2) years. The outcomes of surgical correction and internal fixation were evaluated by postoperative regular follow-up. We also recorded the time and position of rod fracture occurrence. The Cobb angle, coronal balance and sagittal balance were measured and compared to analyze the corresponding salvage methods and revision outcomes. Results: Three patients encountered rod fracture during follow-up, so the incidence of rod fracture after surgery for lumbosacral deformity associated sacral agenesis was 15.8%(3/19). Based on their own conditions, we formulated the individualized strategy and performed the revision surgery through the posterior-only approach. The most critical step was abundant bone-grafting and fusion in the defected sacroiliac joint. After revision, the scoliotic Cobb angle improved in two patients (91.5° vs 47.5°, 49.0° vs 28.0°) and coronal balance improved in one patient (40.3 mm vs 24.3 mm). No complication reoccurred during follow-up. Conclusion: The rod fracture after surgery for lumbosacral deformity associated sacral agenesis is quite common, which is probably correlated with its unique deformed structure and biomechanical characteristics. The individualized salvage methods and adequate bone-grafting and fusion for the defected sacroiliac joint will guarantee the reconstruction and maintenance of spine balance after revision.
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Affiliation(s)
- H D Bao
- Department of Spine Surgery, the Affiliated Nanjing Drum Tower Hospital of Nanjing University, Nanjing 210008, China
| | - T Y Zhang
- Department of Spine Surgery, the Affiliated Nanjing Drum Tower Hospital of Nanjing University, Nanjing 210008, China
| | - S B Shu
- Department of Spine Surgery, the Affiliated Nanjing Drum Tower Hospital of Nanjing University, Nanjing 210008, China
| | - Z Liu
- Department of Spine Surgery, the Affiliated Nanjing Drum Tower Hospital of Nanjing University, Nanjing 210008, China
| | - X Sun
- Department of Spine Surgery, the Affiliated Nanjing Drum Tower Hospital of Nanjing University, Nanjing 210008, China
| | - B Wang
- Department of Spine Surgery, the Affiliated Nanjing Drum Tower Hospital of Nanjing University, Nanjing 210008, China
| | - B P Qian
- Department of Spine Surgery, the Affiliated Nanjing Drum Tower Hospital of Nanjing University, Nanjing 210008, China
| | - Y Yu
- Department of Spine Surgery, the Affiliated Nanjing Drum Tower Hospital of Nanjing University, Nanjing 210008, China
| | - Y Qiu
- Department of Spine Surgery, the Affiliated Nanjing Drum Tower Hospital of Nanjing University, Nanjing 210008, China
| | - Z Z Zhu
- Department of Spine Surgery, the Affiliated Nanjing Drum Tower Hospital of Nanjing University, Nanjing 210008, China
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Zhang TY, Li CL. [Progress in diagnosis and treatment of congenital ear malformation]. Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2021; 56:394-398. [PMID: 33832201 DOI: 10.3760/cma.j.cn115330-20200428-00347] [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)
- T Y Zhang
- Department of Facial Plastic and Reconstructive Surgery, ENT institute, Eye & ENT Hospital, NHC Key Laboratory of Hearing Medicine (Fudan University), Shanghai 200031, China
| | - C L Li
- Department of Facial Plastic and Reconstructive Surgery, ENT institute, Eye & ENT Hospital, NHC Key Laboratory of Hearing Medicine (Fudan University), Shanghai 200031, China
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13
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Guo Y, Li CL, Fu YY, Zhang TY. [Correction of severe cup ears using postauricular tongue-shaped flap combined with deep fascial suspension]. Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2021; 56:323-328. [PMID: 33832188 DOI: 10.3760/cma.j.cn115330-20200428-00345] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the effect and satisfaction of using the postauricular tongue-shaped flap combined with deep fascia suspension in correcting severe cup ear malformation. Methods: Between August 2018 and November 2019, nine cases (10 ears) of Tanzer type Ⅲ severe cup ear malformation were treated with postauricular tongue-shaped flap combined with deep fascia suspension in this study. Results: Nine cases primary healed without hematoma, infection or skin necrosis, except one case with postoperative incision dehiscence. The cup ear deformity was significantly improved after the operation, the helix was intact, and the anti-helix was visible. The length, width, and circumference of the auricle were significantly enlarged three months following surgeries. There were no other complications except 1 patient recurrence 12 months after surgery. The patients were highly satisfied with the results of the surgery. Conclusions: Although the aesthctic of the reconstructed auricle is insufficient, this new technology makes full use of the autologous auricle tissue to correct severe cup ear malformation with good results.
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Affiliation(s)
- Y Guo
- Department of Facial Plastic and Reconstructive Surgery, ENT institute, Eye & ENT Hospital, NHC Key Laboratory of Hearing Medicine (Fudan University), Shanghai 200031, China
| | - C L Li
- Department of Facial Plastic and Reconstructive Surgery, ENT institute, Eye & ENT Hospital, NHC Key Laboratory of Hearing Medicine (Fudan University), Shanghai 200031, China
| | - Y Y Fu
- Department of Facial Plastic and Reconstructive Surgery, ENT institute, Eye & ENT Hospital, NHC Key Laboratory of Hearing Medicine (Fudan University), Shanghai 200031, China
| | - T Y Zhang
- Department of Facial Plastic and Reconstructive Surgery, ENT institute, Eye & ENT Hospital, NHC Key Laboratory of Hearing Medicine (Fudan University), Shanghai 200031, China
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Kong XR, Li XB, Sun YJ, Zhang TY, Xiao L, Shi BY. [Analysis of BK virus infection in kidney transplant recipients]. Zhonghua Yi Xue Za Zhi 2020; 100:3859-3862. [PMID: 33371631 DOI: 10.3760/cma.j.cn112137-20200817-02404] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To compare the infection of BK virus in the recipients of living donor(LD) kidney transplant and deceased donor(DD) kidney transplant. Methods: A total of 911 recipients who underwent kidney transplantation in the Organ Transplantation Research Institute of the 8th Medical Center of the People's Liberation Army General Hospital from January 2015 to August 2019 were enrolled in this study. The DNA copies of BK virus in urine and peripheral blood of kidney transplant recipients were detected by real-time quantitative PCR. The patients were divided into LD group (n=255) and DD group (n=656). BK virus infection in recipients with DD kidney transplant were compared with that in recipients of LD kidney transplant. Results: The BK virus positive rate in the urine of all subjects was 13.06%(119/911), and that in blood was 2.96% (27/911). The positive rate of BK virus in urine after kidney transplantation was significantly higher than that in blood(P<0.000 1). The positive rate in urine was 9.02% (23/255) in LD group, which was significantly lower than that of 14.63% (96/656) in DD group in the same period (χ(2)=5.097, P=0.012); The positive rate of BK virus infection in relatives group was 0.78% (2/255), which was significantly lower than that of 3.81% (25/656) in DD group (χ(2)=5.849, P=0.007). Conclusions: There was a significant difference in the infection rate of BK virus between the LD and DD group. The incidence of BK virus infection in kidney transplant recipients from DD was higher than that of from LD kidney transplant recipients.
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Affiliation(s)
- X R Kong
- Beijing Key Laboratory of Immunology Regulatory and Organ Transplantation, Department of Organ Transplantation Institute, the 8th Medical Center, Chinese PLA General Hospital, Beijing 100091, China
| | - X B Li
- Beijing Key Laboratory of Immunology Regulatory and Organ Transplantation, Department of Organ Transplantation Institute, the 8th Medical Center, Chinese PLA General Hospital, Beijing 100091, China
| | - Y J Sun
- Beijing Key Laboratory of Immunology Regulatory and Organ Transplantation, Department of Organ Transplantation Institute, the 8th Medical Center, Chinese PLA General Hospital, Beijing 100091, China
| | - T Y Zhang
- The 8th Medical Center, Chinese PLA General Hospital, Kidney Transplant Quality Control Center of National Health Commission, Beijing 100091, China
| | - L Xiao
- Beijing Key Laboratory of Immunology Regulatory and Organ Transplantation, Department of Organ Transplantation Institute, the 8th Medical Center, Chinese PLA General Hospital, Beijing 100091, China
| | - B Y Shi
- Beijing Key Laboratory of Immunology Regulatory and Organ Transplantation, Department of Organ Transplantation Institute, the 8th Medical Center, Chinese PLA General Hospital, Beijing 100091, China
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Zhang TY, Chen XF, Zhan SZ, Wang YH, Xue F, Zhang DY. Validate the score presented by Yu et al.: "Risk factors and score for recollapse of the augmented vertebrae after percutaneous vertebroplasty in osteoporotic vertebral compression fractures". Osteoporos Int 2020; 31:2059-2060. [PMID: 32803315 DOI: 10.1007/s00198-020-05598-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Accepted: 08/11/2020] [Indexed: 12/21/2022]
Affiliation(s)
- T Y Zhang
- Department of Traumatic Orthopaedics, Peking University People's Hospital, Beijing, 100044, China
| | - X F Chen
- Department of Traumatic Orthopaedics, Peking University People's Hospital, Beijing, 100044, China
| | - S Z Zhan
- Department of Traumatic Orthopaedics, Peking University People's Hospital, Beijing, 100044, China
| | - Y H Wang
- Department of Traumatic Orthopaedics, Peking University People's Hospital, Beijing, 100044, China
| | - F Xue
- Department of Traumatic Orthopaedics, Peking University People's Hospital, Beijing, 100044, China.
| | - D Y Zhang
- Department of Traumatic Orthopaedics, Peking University People's Hospital, Beijing, 100044, China
- Institute of Trauma and Nerve Regeneration, Peking University People's Hospital, Beijing, 100044, China
- Department of Orthopaedics, Peking University Binhai Hospital, Tianjin, 300450, China
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Zhang TY, Gao WM, Cao ZP, Li FQ, Pan Y, Wang JB, Tao Z, Xue JJ, Jia YQ, Wang TQ, Zhu BL. Research Progress and Forensic Identification of Alcoholic Cardiomyopathy. Fa Yi Xue Za Zhi 2019; 35:721-725. [PMID: 31970961 DOI: 10.12116/j.issn.1004-5619.2019.06.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Indexed: 11/30/2022]
Abstract
Abstract With the rapid development of the social economy in China, the incidence of diseases caused by excessive drinking is gradually increasing as well. Alcoholic cardiomyopathy refers to long-term high intake of ethanol, and has typical dilated cardiomyopathy characteristics, such as, hemodynamic changes, symptoms, signs, and morphological features. It is a kind of cardiomyopathy that excludes other causes of dilated cardiomyopathy. Due to the lack of specific pathological changes, the forensic pathological identification of alcoholic cardiomyopathy can only be based on the patient's medical history and by ruling out other causes of cardiomyopathy. This paper reviews the pathogenesis and forensic identification of alcoholic cardiomyopathy in order to provide reference for forensic pathologists and clinicians.
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Affiliation(s)
- T Y Zhang
- School of Forensic Medicine, China Medical University, Shenyang 110122, China
| | - W M Gao
- Taicang Public Security Bureau, Taicang 215400, Jiangsu Province, China
| | - Z P Cao
- School of Forensic Medicine, China Medical University, Shenyang 110122, China
| | - F Q Li
- School of Forensic Medicine, China Medical University, Shenyang 110122, China
| | - Y Pan
- School of Forensic Medicine, China Medical University, Shenyang 110122, China
| | - J B Wang
- The Third Clinical Department, China Medical University, Shenyang 110122, China
| | - Z Tao
- The Third Clinical Department, China Medical University, Shenyang 110122, China
| | - J J Xue
- School of Forensic Medicine, China Medical University, Shenyang 110122, China
| | - Y Q Jia
- School of Forensic Medicine, China Medical University, Shenyang 110122, China
| | - T Q Wang
- School of Forensic Medicine, China Medical University, Shenyang 110122, China
| | - B L Zhu
- School of Forensic Medicine, China Medical University, Shenyang 110122, China
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Fu YY, Zhao H, Gao N, Zhang TY. [Correlation study of peripheral blood inflammatory factors in patients with sudden deafness]. Lin Chung Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2019; 33:688-691. [PMID: 31446718 DOI: 10.13201/j.issn.1001-1781.2019.08.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 06/10/2019] [Indexed: 11/12/2022]
Abstract
Objective:The aim of this study is to compare the difference of inflammatory factors in peripheral blood between sudden deafness patients and normal people, and to evaluate the predictive value of inflammatory factors in hearing recovery of sudden deafness patients. Method:Seventy-two inpatients with sudden deafness and 19 healthy persons were included. At the beginning of treatment in our hospital, audiometry was performed and peripheral blood was collected. The levels of IL-1β, IL-6, IL-17α, TGF-β1 and TNF-α in peripheral blood were detected by ELISA. The treatment was intravenous steroid(not applied if patients with contraindication of systemic steroid application)+ intratympanic steroid injection+ microcirculation improvement or neurotrophic therapy+ hyperbaric oxygen. At the end of the treatment, audiometry was performed again. A total of 26 patients were collected to test the levels of inflammatory factors in peripheral blood again at the end of the treatment. Result:The mean levels of inflammatory factors IL-1β, IL-6, IL-17α, TGF-β1 and TNF-α in peripheral blood of patients were (2.66±9.57) pg/ml, (4.71±6.91) pg/ml, (19.33±32.27) pg/ml, (50 018.37±14 660.72) pg/ml, (1.52±2.40) pg/ml, respectively. And the level of these five inflammatory factors in normal persons were (3.61±9.82) pg/ml, (3.58±4.49) pg/ml, (11.64±13.29) pg/ml, (45 199.98±11 956.09) pg/ml,(1.09±1.08) pg/ml respectively. Statistical analysis showed no significant difference between these two groups. A total of 45 cases were effective(hearing threshold increased ≥15 dB) and 27 cases were ineffective(hearing threshold increased<15 dB). There was no significant difference in the levels of inflammatory factors between the two groups. Among 26 patients with blood samples before and after treatment, the level of TGF-β1 after treatment was significantly lower than that before treatment. Conclusion:The levels of these five inflammatory factors including IL-1β, IL-6, IL-17α, TGF-β1 and TNF-αin peripheral blood could not predict the recovery of sudden hearing loss. The role of inflammation in the development of sudden deafness needs further confirmation. TGF-β1 may be involved in the development of sudden deafness.
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Affiliation(s)
- Y Y Fu
- Department of Facial Plastic and Reconstructive Surgery,Eye,Ear,Nose and Throat Hospital,Shanghai Fudan University,Shanghai,200031,China.,Institute of Otolaryngology,Eye,Ear,Nose and Throat Hospital,Shanghai Fudan University
| | - H Zhao
- Institute of Otolaryngology,Eye,Ear,Nose and Throat Hospital,Shanghai Fudan University
| | - N Gao
- Institute of Otolaryngology,Eye,Ear,Nose and Throat Hospital,Shanghai Fudan University
| | - T Y Zhang
- Department of Facial Plastic and Reconstructive Surgery,Eye,Ear,Nose and Throat Hospital,Shanghai Fudan University,Shanghai,200031,China.,Institute of Otolaryngology,Eye,Ear,Nose and Throat Hospital,Shanghai Fudan University
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Wang JT, Liu ZQ, Zhang TY, Chen Y, Zhou X, Li GX, Liu WY, Wang ZM. [Screening of periodontal and salivary parameters in patients with frequent acute exacerbation of chronic obstructive pulmonary disease]. Zhonghua Kou Qiang Yi Xue Za Zhi 2019; 54:410-415. [PMID: 31177682 DOI: 10.3760/cma.j.issn.1002-0098.2019.06.013] [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: 06/09/2023]
Abstract
Objective: To screen the risk factors of patients with frequent acute exacerbation of chronic obstructive pulmonary disease (COPD) by detecting the clinical indicators of periodontitis and the level of bacterial and inflammatory markers in saliva. Methods: Thirty-eight COPD patients in their stable period were recruited and detected from Beijing Chao-Yang Hospital,Capital Medical University during December 2016 to May 2017. The periodontal index were recorded. The levels of inflammatory factors in saliva samples were examined by using enzyme linked immunosorbent assay (ELISA). The bacteria composition in the saliva samples were identified by using 16SrRNA gene pyrosequencing. All patients were followed up and monitored for acute exacerbation of COPD for 12 months. The patients were divided into frequent acute exacerbation group (≥2 times/year, n=10) and non frequent acute exacerbation group (<2 times/year, n=28). Results: In univariate analysis, the patients' average age of frequent acute exacerbation group (69.0±7.3) was significantly older than that of non-frequent acute exacerbation group (61.8±8.3) (P=0.02). The numbers of remaining teeth ≤26 [100% (10/10)] was significantly higher and plaque index ≤2.5 (2/10) in frequent acute exacerbation group was significantly lower compared with the remaining teeth ≤26 [43% (12/28)] and the plaque index ≤2.5 [71% (21/28)] in non-frequent acute exacerbation group (P=0.02, P=0.01). The proportions of salivary inflammatory factors interleukin-6 (IL-6) level ≤60 ng/L (10%),C-reactive protein (CRP) level ≤1 550 μg/L (30%), matrix metalloproteinase-8 (MMP-8) level ≤140 μg/L (30%) and fibrinogen level ≤90 mg/L (30%) in frequent acute exacerbation group were significantly lower compared with salivary inflammatory factors IL-6 level ≤60 ng/L (71%),CRP level ≤1 550 μg/L (71%), MMP-8 level ≤140 μg/L (86%) and fibrinogen level ≤90 mg/L (71%) in non-frequent acute exacerbation group (P<0.05). The differences of relative abundances of salivary bacteria,such as species of Chloroflexi, Anaerolineae, Anaeroales, Corynebacteriales, Anaerolineaceae, Tissierellaceae, Leptotrichiaceae, Corynebacteriaceae, Leptotrichia, Moryella, Lachnoanaerobaculum and Corynebacterium between frequent acute exacerbation group and non-frequent acute exacerbation group were significantly different (P<0.05). In multivariate logistics regression analysis,the level of IL-6 >60 ng/L and the relative abundance of Corynebacteriales >0.2 had significant difference (P<0.05). Conclusions: The level of IL-6 and the relative abundance of Corynebacteriales might be the markers of frequent acute exacerbation in COPD patients.
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Affiliation(s)
- J T Wang
- Department of Stomatology, Beijing Chao-Yang Hospital, Capital Medical University, Beijing 100020, China
| | - Z Q Liu
- Department of Stomatology, Beijing Chao-Yang Hospital, Capital Medical University, Beijing 100020, China
| | - T Y Zhang
- Department of Stomatology, Shanxi Medical University, Taiyuan 030001, China
| | - Y Chen
- Department of Stomatology, Beijing Chao-Yang Hospital, Capital Medical University, Beijing 100020, China
| | - X Zhou
- Department of Stomatology, Beijing Chao-Yang Hospital, Capital Medical University, Beijing 100020, China
| | - G X Li
- Department of Respiratory, Guang'anmen Hospital, China Academy of Chinese Medical Sciences, Beijing 100053, China
| | - W Y Liu
- Department of Stomatology, Beijing Chao-Yang Hospital, Capital Medical University, Beijing 100020, China
| | - Z M Wang
- Department of Stomatology, Beijing Chao-Yang Hospital, Capital Medical University, Beijing 100020, China
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Sun Y, Su Y, Zhang TY, Xing WZ. [Optical properties of computer aided design and computer aided manufactured materials for veneer restorations]. Zhonghua Kou Qiang Yi Xue Za Zhi 2019; 54:246-249. [PMID: 30955296 DOI: 10.3760/cma.j.issn.1002-0098.2019.04.007] [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 investigate the translucency parameters (TP) and the color parameters of computer-aided design and computer-aided manufacturing (CAD/CAM) materials for veneer restorations in order to guide clinical practice. Methods: Eleven groups of CAD/CAM materials (A2 shade) were included in this study: IPS e.max CAD HT/LT, IPS Empress CAD HT/LT, Lava(TM) Ultimate HT/LT, VITA SUPRINITY HT/T, VITA ENAMIC HT/T, VITABLOCS Mark Ⅱ, and were named as Group A, B, C, D, E, F, G, H, I, J, K. Each material was designed and milled to disk-shaped specimens (10.0 mm×8.0 mm×0.7 mm) (n=6). The specimens were polished with silicon carbide paper and the thickness of specimens were adjusted into (0.60±0.03) mm. The color parameters of specimens were individually measured with the colorimeter against black and white ceramic tiles background to obtain the TP values. The color parameters of the specimens against the composite resin background were also measured and the color differences (ΔE values) between specimens and the A2 shade tab were calculated. Results: One-way ANOVA showed that the translucency parameters of the 11 groups of materials were statistically significant (F=253.69, P<0.05). The ΔE values of CAD/CAM material groups ranged from 1.78 to 4.12 (ΔE values<5.5). Conclusions: The microstructure of CAD/CAM materials and the types of material translucency influence the optical properties. The CAD/CAM materials in this experiment have achieved color matching with the A2 shade tab.
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Affiliation(s)
- Y Sun
- Department of Prosthodontics, Dalian Stomatological Hospital, Dalian 116021, China
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Zhang TY, Shang XL, Xie YX, Lin YT, Zhang QJ, Li D, Xin YC. [The effects of postauricular injection of methylprednisolone on medium-high frequency sudden hearing loss]. Lin Chung Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2018; 32:537-540. [PMID: 29798087 DOI: 10.13201/j.issn.1001-1781.2018.07.015] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 01/11/2018] [Indexed: 11/12/2022]
Abstract
Objective:To study the effects of postauricular injection of methylprednisolone on medium-high frequency sudden hearing loss.Method:The data of 45 patients with invalid treatment who were diagnosed as medium-high frequency sudden hearing loss were retrospectively studied. They were divided into postauricular injection group and non-postauricular injection group. The treatment efficiency and hearing improvement at each frequency were compared between the two groups.Result:The improvements of hearing threshold in the non-postauricular injection group were(6.30±5.00)dB HL,(3.80±5.52)dB HL,(5.35±5.50)dB HL,(15.60±11.84)dB HL,(19.60±13.46)dB HL,(15.40±12.90)dB HL at 250, 500, 1000, 2000, 4000 and 8000Hz, respectively. The hearing improvements of the postauricular injection group were (5.35±6.22)dB HL,(2.50±3.00)dB HL,(4.65±6.60)dB HL,(23.75±10.75)dB HL,(25.75±11.73)dB HL,(30.50±14.50)dB HL at 250, 500,1000,2000,4000 and 8000Hz, respectively. There were significant differences between the two groups in hearing improvements at 2000-8000Hz. The treatment effective rates were 44% and 80% for the non-postauricular injection group and postauricular injection group respectively, which showed a significant difference(χ²=8.385P<0.05).Conclusion:Postauricular injection of methylprednisolone as a remedy treatment is safe and effective for sudden hearing loss in middle and high frequency.
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Affiliation(s)
- T Y Zhang
- Hebei North University,Zhangjiakou,075000,China
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Yang MZ, Zhang TY, Li HJ, Yang TT, Ding ZJ, Liu Q. [Research Progress on Postmortem Interval Estimation by Vitreous Humor]. Fa Yi Xue Za Zhi 2018; 34:165-170. [PMID: 29923384 DOI: 10.3969/j.issn.1004-5619.2018.02.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 03/14/2017] [Indexed: 11/18/2022]
Abstract
Postmortem interval (PMI) estimation is one of the most challenging problems in the field of forensic science. Vitreous humor is a hotspot which has been used for PMI estimation and postmortem chemical analysis in forensic pathology. In order to provide novel perspectives for the future research of PMI estimation using vitreous humor, the comparison between vitreous humor with other common body fluids, the effect of temperature on vitreous humor, vitreous humor detection method and data fitting method have been reviewed in this paper.
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Affiliation(s)
- M Z Yang
- Department of Forensic Medicine, Tongji Medical College of Huazhong University of Science and Technology, Wuhan 430030, China.,Shanghai Key Laboratory of Forensic Medicine, Shanghai Forensic Service Platform, Academy of Forensic Science, Shanghai 200063, China
| | - T Y Zhang
- Shanghai Key Laboratory of Crime Scene Evidence, Key Laboratory of Forensic Evidence and Science Technology, Ministry of Public Security, Institute of Forensic Science, Shanghai Public Security Bureau, Shanghai 200083, China
| | - H J Li
- Clinical Lab, Tongji Hospital, Tongji Medical College of Huazhong University of Science and Technology, Wuhan 430030, China
| | - T T Yang
- Key Laboratory of Evidence Science, Ministry of Education, China University of Political Science and Law, Beijing 100088, China
| | - Z J Ding
- Department of Forensic Medicine, Tongji Medical College of Huazhong University of Science and Technology, Wuhan 430030, China
| | - Q Liu
- Department of Forensic Medicine, Tongji Medical College of Huazhong University of Science and Technology, Wuhan 430030, China
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Zhang TY, Chen Y. [Principles for diagnosis and clinical management of syndromic microtia]. Lin Chung Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2018; 32:883-885. [PMID: 29921066 DOI: 10.13201/j.issn.1001-1781.2018.12.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [Subscribe] [Scholar Register] [Received: 04/25/2018] [Indexed: 11/12/2022]
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Zhang TY, Liu JL, Zhang JL, Zhang N, Yang X, Qu HX, Xi L, Han JC. Effects of Dietary Zinc Levels on the Growth Performance, Organ Zinc Content, and Zinc Retention in Broiler Chickens. ACTA ACUST UNITED AC 2018. [DOI: 10.1590/1806-9061-2017-0604] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- TY Zhang
- Chinese Academy of Agricultural Sciences, China
| | - JL Liu
- Chinese Academy of Agricultural Sciences, China
| | - JL Zhang
- Shangqiu Normal University, China; Henan Agricultural University, China
| | - N Zhang
- Shangqiu Normal University, China; Henan Agricultural University, China
| | - X Yang
- Shangqiu Normal University, China; Henan Agricultural University, China
| | - HX Qu
- Shangqiu Normal University, China
| | - L Xi
- Shangqiu Normal University, China
| | - JC Han
- Shangqiu Normal University, China
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Yang MZ, Li HJ, Zhang TY, Ding ZJ, Wu SF, Qiu XG, Liu Q. [Application of Mixed-effect Model in PMI Estimation by Vitreous Humor]. Fa Yi Xue Za Zhi 2018; 34:13-17. [PMID: 29577698 DOI: 10.3969/j.issn.1004-5619.2018.01.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 03/22/2017] [Indexed: 11/18/2022]
Abstract
OBJECTIVES To test the changes of the potassium (K⁺) and magnesium (Mg²⁺) concentrations in vitreous humor of rabbits along with postmortem interval (PMI) under different temperatures, and explore the feasibility of PMI estimation using mixed-effect model. METHODS After sacrifice, rabbit carcasses were preserved at 5 ℃, 15 ℃, 25 ℃ and 35 ℃, and 80-100 μL of vitreous humor was collected by the double-eye alternating micro-sampling method at every 12 h. The concentrations of K⁺ and Mg²⁺ in vitreous humor were measured by a biochemical-immune analyser. The mixed-effect model was used to perform analysis and fitting, and established the equations for PMI estimation. The data detected from the samples that were stoned at 10 ℃, 20 ℃ and 30 ℃ with 20, 40 and 65 h were used to validate the equations of PMI estimation. RESULTS The concentrations of K⁺ and Mg²⁺ [f(x,y)] in vitreous humor of rabbits under different temperature increased along with PMI (x). The relative equations of K⁺ and Mg²⁺ concentration with PMI and temperature under 5 ℃~35 ℃ were fK⁺(x,y)=3.413 0+0.309 2 x+0.337 6 y+0.010 83 xy-0.002 47 x² (P<0.000 1), and fMg²⁺(x,y)=0.745 6+0.006 432 x+0.033 8 y (P<0.000 1), respectively. It was proved that the time of deviation for PMI estimation by K⁺ and Mg²⁺ was in 10 h when PMI was between 0 to 40 h, and the time of deviation was in 21 h when PMI was between 40 to 65 h. CONCLUSIONS the ambient temperature range of 5 ℃-35 ℃, the mixed-effect model based on temperature and vitreous humor substance concentrations can provide a new method for the practical application of vitreous humor chemicals for PMI estimation.
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Affiliation(s)
- M Z Yang
- Department of Forensic Medicine, Tongji Medical College of Huazhong University of Science and Technology, Wuhan 430030, China
| | - H J Li
- Clinical Lab, Tongji Hospital, Tongji Medical College of Huazhong University of Science and Technology, Wuhan 430030, China
| | - T Y Zhang
- Shanghai Key Laboratory of Crime Scene Evidence, Institute of Forensic Science, Shanghai Public Security Bureau, Shanghai 200083, China
| | - Z J Ding
- Department of Forensic Medicine, Tongji Medical College of Huazhong University of Science and Technology, Wuhan 430030, China
| | - S F Wu
- Department of Forensic Medicine, Tongji Medical College of Huazhong University of Science and Technology, Wuhan 430030, China
| | - X G Qiu
- Department of Forensic Medicine, Tongji Medical College of Huazhong University of Science and Technology, Wuhan 430030, China
| | - Q Liu
- Department of Forensic Medicine, Tongji Medical College of Huazhong University of Science and Technology, Wuhan 430030, China
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Chen T, Yang L, Zhang TY. [The basic study and clinical progress of auditory implants treatment of conductive hearing loss]. Lin Chung Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2017; 31:583-587. [PMID: 29871319 DOI: 10.13201/j.issn.1001-1781.2017.08.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 01/23/2017] [Indexed: 11/12/2022]
Abstract
In recent years, with the emergence and clinical application of a series of artificial auditory implantation technologies, surgically hard-treated conductive hearing loss treatment has made great progress and development. In this paper, research progress of bone conduction implant aids and middle ear implant devices treatment of conductive hearing loss are reviewed.
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Zheng XC, Wu QJ, Song ZH, Zhang H, Zhang JF, Zhang LL, Zhang TY, Wang C, Wang T. Effects of Oridonin on growth performance and oxidative stress in broilers challenged with lipopolysaccharide. Poult Sci 2016; 95:2281-9. [PMID: 27143760 DOI: 10.3382/ps/pew161] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [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: 02/03/2016] [Accepted: 03/27/2016] [Indexed: 12/15/2022] Open
Abstract
This study was conducted to investigate the effects of oridonin (ORI) on growth performance and antioxidant capacity in broiler chickens that were repeatedly challenged with lipopolysaccharide (LPS). A total of 384 one-day-old male Arbor Acre broiler chickens were randomly assigned to 8 treatments with 6 replicate cages per treatment and 8 birds per replicate. There were 4 dietary treatments: the control group (birds fed the basal diet), the ORI 50 group, the ORI 80 group, and the ORI 100 group (the basal diet supplemented with 50, 80, and 100 mg/kg oridonin, respectively). Broilers were intraperitoneally injected with either 250 μg/kg BW LPS or an equivalent amount of sterile saline at 16, 18, and 20 d of age. LPS decreased the average daily weight gain (ADG), the average daily feed intake (ADFI), and the feed conversion ratio (FCR) of broiler chickens (P < 0.05); oridonin supplementation had no effects on performance whether before or after LPS injection (P > 0.05). LPS stimulation increased the relative weight of the spleen and bursa (P < 0.05); oridonin inclusion markedly attenuated the increased spleen index (P < 0.05). Additionally, the LPS-induced increases in the concentrations of malondialdehyde (MDA) and decreases in activities of total superoxide dismutase (T-SOD), total antioxidant capacity (T-AOC) and catalase (CAT) were dramatically attenuated by oridonin in both the serum and liver (P < 0.05). Furthermore, LPS down-regulated the mRNA expressions of nuclear factor erythroid 2-related factor 2 (Nrf2), copper and zinc superoxide dismutase (Cu/Zn-SOD), manganese superoxide dismutase (Mn-SOD), glutathione peroxidase (GPx1), and CAT in the liver (P < 0.05), However, oridonin inclusion increased the liver mRNA expression levels of Nrf2, Cu/Zn-SOD, Mn-SOD, CAT, and GPx1 (P < 0.05). It was concluded that the dietary oridonin supplementation at an optimum dose of 100 mg/kg improves the antioxidant capacity in broilers, as evidenced by the decrease in MDA and the increase in total SOD activities and mRNA expression levels of the liver antioxidant genes, although the effects on growth performance was negligible.
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Affiliation(s)
- X C Zheng
- College of Animal Science & Technology, Nanjing Agricultural University, Nanjing Jiangsu, China, 210095
| | - Q J Wu
- College of Animal Science & Technology, Nanjing Agricultural University, Nanjing Jiangsu, China, 210095 State Key Laboratory of Animal Nutrition, Yuan Ming Yuan West Road, HaiDian District, Beijing, P.R. China 100193
| | - Z H Song
- College of Animal Science & Technology, Nanjing Agricultural University, Nanjing Jiangsu, China, 210095
| | - H Zhang
- College of Animal Science & Technology, Nanjing Agricultural University, Nanjing Jiangsu, China, 210095
| | - J F Zhang
- College of Animal Science & Technology, Nanjing Agricultural University, Nanjing Jiangsu, China, 210095
| | - L L Zhang
- College of Animal Science & Technology, Nanjing Agricultural University, Nanjing Jiangsu, China, 210095
| | - T Y Zhang
- Chinese Academy of Agriculture Sciences, Institute of Animal Science, Beijing, P.R. China, 100193
| | - C Wang
- College of Animal Science & Technology, Nanjing Agricultural University, Nanjing Jiangsu, China, 210095
| | - T Wang
- College of Animal Science & Technology, Nanjing Agricultural University, Nanjing Jiangsu, China, 210095
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Zheng T, Su CH, Zhao J, Zhang XJ, Zhang TY, Zhang LR, Kan QC, Zhang SJ. Effects of CYP3A5 and CYP2D6 genetic polymorphism on the pharmacokinetics of diltiazem and its metabolites in Chinese subjects. Pharmazie 2013; 68:257-260. [PMID: 23700791] [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: 06/02/2023]
Abstract
PURPOSE To assess the possibility of using CYP2D6 10 +/- CYP3A5*3 as biomarkers to predict the pharmacokinetics of diltiazem and its two metabolites among healthy Chinese subjects. METHODS 41 healthy Chinese were genotyped for CYP3A5 3 and CYP2D6 10, and then received a single oral dose of diltiazem hydrochloride capsules (300 mg). Multiple blood samples were collected over 48 h, and the plasma concentrations of diltiazem, N-desmethyl diltiazem and desacetyl diltiazem were determined by HPLC-MS/MS. The relationships between the genotypes and pharmacokinetics were investigated. RESULTS The pharmacokinetics of diltiazem, N-desmethyl diltiazem were not significantly affected by both CYP3A5 3 and CYP2D6*10 alleles. However, the systemic exposure of the pharmacologyically active metabolites, desacetyl diltiazem, was 2-fold higher in CYP2D6 10/10 genotype carriers than in 1/10 or 1/1 ones (AUC(o-inf) of CYP2D6 1/1, 1/10 and 10/10 are 398.2 +/- 162.9, 371,0 69.2 and 726.2 +/- 468.1 respectively, p <0.05). CONCLUSIONS Two of the most frequent alleles, CYP3A5 3 and CYP2D6 10, among Chinese do not have major impacts on the disposition of diltiazem and N-desmethyl diltiazem. However, the desacetyl diltiazem showed 2-fold accumulation in individuals with CYP2D6 10/10 genotype. Despite this, the effect of genotype of CYP2D6 on clinical outcome of diltiazem treatment is expected to be limited.
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Affiliation(s)
- T Zheng
- Frontage Laboratories, Inc., Zhengzhou, Henan Province, China
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28
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Peng YM, Zhang TY, Wang Q, Zetterström R, Strandvik B. Fatty acid composition in breast milk and serum phospholipids of healthy term Chinese infants during first 6 weeks of life. Acta Paediatr 2007; 96:1640-5. [PMID: 17937688 DOI: 10.1111/j.1651-2227.2007.00482.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
AIM To compare the fatty acid (FA) pattern in early and mature breast milk with that in plasma phospholipids of cord blood and breast-fed infants. METHODS Forty-five mother-infant pairs from western Shanghai were studied. All infants, born at term with normal weight and length, were examined at birth and days 5 and 42. FA was analyzed by capillary gas-liquid chromatography. RESULTS Cord blood showed higher concentration of long-chain polyunsaturated FA (LCPUFA) but lower saturated (SFA) and monounsaturated (MUFA) FA than postnatal infants' plasma. SFA decreased with age in the infants, but MUFA and linoleic acid (LA, 18:2omega6) increased. LCPUFA were lower in the plasma of 5-day-old infants than in cord blood, but LA was 80%, alpha-linolenic acid (ALA, 18:3omega3) 33% and the ratio omega-6/omega-3 42% higher. At day 42, LA increased further, LCPUFA remained similar, and was in breast milk lower than at day 5, while ALA and gamma-linolenic acid (18:3omega6) were higher. The activity index of desaturases indicated high Delta9 activity in breast milk and high activity of Delta5 desaturase in the infants. CONCLUSION Breast milk FA composition changed markedly from day 5 to 42 with increasing correlation to infants' plasma. Calculation of desaturase activities suggested high capacity of LCPUFA synthesis.
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Affiliation(s)
- Y M Peng
- Department of Child Health Care, Children's Hospital, Fudan University, Shanghai, China.
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Lau RKL, Kwok ACM, Chan WK, Zhang TY, Wong JTY. Mechanical characterization of cellulosic thecal plates in dinoflagellates by nanoindentation. J Nanosci Nanotechnol 2007; 7:452-7. [PMID: 17450778] [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: 05/15/2023]
Abstract
Dinoflagellates constitute an important group of microorganisms. Symbiotic dinoflagellates are responsible for the primary production of coral reef ecosystems and the phenomenon of their demise is known as "coral bleaching." Blooming of the planktonic dinoflagellates is the major cause of "red tides." Many dinoflagellates have prominent membrane-bound thecal plates at their cell cortices. These thecal plates have high cellulose content and are biologically fabricated into various shapes. However, the mechanical properties of theca have not previously been characterized; understanding these properties, including hardness and elastic modulus, will give insights into the ecological significance and biotechnological potential of bio-fabricated structures. A series of nanoindentation tests were performed on various locations of cellulosic thecal plates isolated from the dinoflagellates Alexandrium catenella and Lingulodinium polyedrum. Despite having transparent properties, thecal plates possess mechanical properties comparable to softwood cell walls, implicating their role as a protective cell covering. Consistent measurements were obtained when indentation was performed at various locations, which contrasts with the high variability of cellulose microfibers from plant sources. The present study demonstrated the novel properties of this potential new source of cellulose.
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Affiliation(s)
- Ringo K L Lau
- Department of Biology, Hong Kong University of Science and Technology, Clearwater Bay, Kowloon, Hong Kong SAR, People's Republic of China
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Zhang AL, Zhang TY, Luo JX, Chen SC, Guan WJ, Fu CY, Peng SQ, Li HL. Constitutive expression of human angiostatin in Pichia pastoris by high-density cell culture. J Ind Microbiol Biotechnol 2006; 34:117-22. [PMID: 16988811 DOI: 10.1007/s10295-006-0175-3] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2006] [Accepted: 08/20/2006] [Indexed: 10/24/2022]
Abstract
A high-density cell culture method to produce human angiostatin has been successfully established by constitutive expression of the protein in Pichia pastoris. The fermentation was carried out in a 20 l bioreactor with a 10 l working volume, using a high-density cell culture method by continuously feeding with 50% glycerol-0.8% PTM4 to the growing culture for 60 h at 30 degrees C. Dissolved oxygen level was maintained at 25-30% and pH was controlled at 5 by the addition of 7 M NH4OH. Angiostatin was constitutively expressed during the fermentation by linking its expression to the P. pastoris constitutive GAP promoter (pGAP). But after 36 h of fermentation, the peak biomass growth was 305 as measured by absorption of 600 nm, while the peak angiostatin expression was 176 mg/l. Similar to the product expressed from inducible system [24], angiostatin produced from constitutive system also inhibited the angiogenesis on the CAM and suppressed the growth of B16 melanoma in C57BL/6J mouse. The above results suggest that GAP promoter is more efficient than AOX1 promoter for the expression of angiostatin in P. pastoris by shake flask culture or high-density cell fermentation and is likely to be an alternative to AOX1 promoter in large-scale expression of angiostatin and other heterologous proteins.
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Affiliation(s)
- A L Zhang
- Institute of Tropical Bioscience and Biotechnology/National Key Biotechnology Laboratory for Tropical Crops, CATAS, Haikou Hainan, 571101, China.
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Zhang TY, Chrétien P, Meaney MJ, Gratton A. Influence of naturally occurring variations in maternal care on prepulse inhibition of acoustic startle and the medial prefrontal cortical dopamine response to stress in adult rats. J Neurosci 2005; 25:1493-502. [PMID: 15703403 PMCID: PMC6725982 DOI: 10.1523/jneurosci.3293-04.2005] [Citation(s) in RCA: 114] [Impact Index Per Article: 6.0] [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: 11/21/2022] Open
Abstract
In rats, naturally occurring variations in maternal care contribute to the development of individual differences in the behavioral and neuroendocrine responses to stress during adulthood. The dopamine (DA) projection to the medial prefrontal cortex (mPFC) plays an important role in mediating stress responsivity and is thought to be involved also in regulating sensorimotor gating. In the present study, we compared prepulse inhibition (PPI) of acoustic startle as well as the left and right mPFC DA stress responses in the adult offspring of high- and low-licking/grooming (LG) dams. Our data indicate that the offspring of low-LG animals are impaired on measures of PPI compared with high-LG animals. We also observed in low-LG animals a significant blunting of the mPFC DA stress responses that was lateralized to the right hemisphere, whereas in high-LG animals, the left and right mPFC DA stress responses were equally attenuated. Although mPFC levels of DA transporter did not differ between the two groups of animals, mPFC levels of catechol-O-methyl transferase immunoreactivity of low-LG animals were significantly lower than those of high-LG animals. These data provide evidence that variations in maternal care can lead to lasting changes in mPFC DA responsivity to stress and suggest the possibility that such changes in mesocorticolimbic DA function can also lead to deficits in sensorimotor gating.
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Affiliation(s)
- T Y Zhang
- Douglas Hospital Research Centre, Department of Psychiatry, McGill University, Montréal, Québec, H4H 1R3 Canada
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Abstract
Dextromethorphan, an antitussive widely available over-the-counter, is abused, mostly by teenagers at high doses. In our previous report, a high dose of dextromethorphan activated the midbrain dopamine neurons of adolescent rats. In the present study, we performed c-Fos immunohistochemistry in the dopaminergic terminal regions of adolescent rat brain after the intraperitoneal administration of dextromethorphan at different doses (0, 10, 20, and 40 mg/kg), and also examined the effects on nocturnal behavior. The results showed that dextromethorphan increased c-Fos expression dose dependently in the anterior cingulate cortex, caudate putamen, nucleus accumbens, and central amygdala. Significant ataxia occurred and both locomotor and rearing activity decreased immediately after the dextromethorphan injection. We conclude that the neurons in the reward pathway of the adolescent rat brain appear to be activated by a single injection of dextromethorphan, and that activation of this pathway by dextromethorphan may correlate with the behavioral effects and abuse potential of the drug.
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Affiliation(s)
- J W Jahng
- Department of Pharmacology and Yonsei Brain Research Institute, Brain Korea 21 Project for Medical Science, Yonsei University College of Medicine, 120-752, Seoul, South Korea
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Yuan LM, Zi M, Ai P, Chen XX, Li ZY, Fu RN, Zhang TY. Versatile two-phase solvent system for alkaloid separation by high-speed counter-current chromatography. J Chromatogr A 2001; 927:91-6. [PMID: 11572401 DOI: 10.1016/s0021-9673(01)01057-3] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
In order to find a versatile high speed counter-current chromatography solvent system that can be used as a general prefractionation system for most alkaloids, the crude extracts of five Chinese traditional medicinal herbs, Cortex phellodendri, Semen strychni, green tea, Sophora flavescens ait, and Datura mete L. were resolved. All separations were performed only with a two-phase system composed of CHCl3-CH3OH-water (4:3:2). The water had different acidities controlled by adding NaH2PO4 or HCl to each sample. The fractionated components were identified by thin-layer chromatography, which confirmed this solvent system was versatile and very useful for the separation of alkaloids.
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Affiliation(s)
- L M Yuan
- Department of Chemistry, Yunnan Normal University, Kunming, China.
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Abstract
Dextromethorphan (DM), an antitussive widely available in over-the-counter, has been abused mostly in teenage groups at high doses. To examine effects of DM on the reward pathway, we injected a high dose of DM (40 mg/kg; intraperitoneally) into the adolescent rat and measured tyrosine hydroxylase (TH) mRNA by in situ hybridization in the ventral tegmental area (VTA) and the substantia nigra (SN). Remarkable increases in the level of TH mRNA were observed in the VTA and SN 2 h after DM injection. Stereotyped behavior and ataxia increased, and rearing decreased by DM administration. These results suggest that DM-induced increase in TH mRNA expression in mesencephalon contribute to the reinforcing property and the behavioral effects of DM.
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Affiliation(s)
- T Y Zhang
- Department of Pharmacology and Yonsei Brain Research Institute, Brain Korea 21 Project for Medical Sciences, Yonsei University College of Medicine, Seoul 120-752, South Korea
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Yang PC, Zeng HY, Zhang TY, Zheng YQ, Chen JZ. The effects of sensitization and hypersensitivity reaction on transepithelial antigen transport of rat nasal mucosa. Otolaryngol Head Neck Surg 2001; 125:54-9. [PMID: 11458215 DOI: 10.1067/mhn.2001.116185] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [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: 11/22/2022]
Abstract
METHODS The prevalence of airway allergy is very high. The ways that antigen passes across the airway tract epithelial barrier are not well understood. This study uses a model antigen, horseradish peroxidase (HRP), to sensitize and challenge the respiratory tract in the rat model. RESULTS The results showed increases in HRP endosomes in nasal epithelial cells 5 minutes after HRP challenge in the sensitized rats compared with controls, which were further increased 30 minutes after HRP challenge, as well as with the paracellular region filled with HRP products. Meanwhile, mast cells were activated as shown by degranulation. Analysis of cell type showed that there were many more HRP endosomes in the nonciliated cells and there were many more nonciliated cells in the nasal mucosa of the sensitized rats. CONCLUSION The results demonstrate that sensitization promotes airway mucosal epithelial cells' uptake and transport of specific antigen and that mast cells may play certain roles in this process.
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Affiliation(s)
- P C Yang
- Department of Otolaryngology, the First Affiliated Hospital, Shanxi Medical University, Taiyuan, Shanxi, China.
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36
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Wei Y, Zhang TY, Zhang S, Liu QH. [Separation of standard proteins and actual samples using cross-axis counter current chromatography]. Se Pu 2001; 19:188-90. [PMID: 12541673] [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
A system of m (12.5% PEG8000): m (25% K2HPO4) = 1:1 was used to separate two kinds of standard proteins, glycoprotein in Morchella esculenta (L.) and glycoprotein in Lycium barbarum (L.), the upper phase was used as stationary phase, and the lower phase was used as mobile phase. The revolution speed was 500 r/min and the flow rate was 60 mL/h. In comparing with high performance liquid chromatography, cross-axis counter current chromatography can increase load capacity without loss of resolution. The advantage of this method was verified, indicating that cross-axis counter current chromatography was a useful method for biopolymer separation.
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Affiliation(s)
- Y Wei
- Beijing Research Center for Separation & Purification Technologies of Natural Products, Beijing Institute of New Technology and Application, Beijing 100035, China.
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Li HB, Chen F, Zhang TY, Yang FQ, Xu GQ. Preparative isolation and purification of lutein from the microalga chlorella vulgaris by high-speed counter-current chromatography. J Chromatogr A 2001; 905:151-5. [PMID: 11206781 DOI: 10.1016/s0021-9673(00)00987-0] [Citation(s) in RCA: 56] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
High-speed counter-current chromatography (HSCCC) was applied to the isolation and purification of lutein from microalgae. Analytical HSCCC was used for the preliminary selection of a suitable solvent system composed of n-hexane-ethanol-water (4:3:1, v/v). Using the above solvent system, preparative HSCCC was successfully performed yielding lutein at 98% purity from 200 mg of the crude extract in a one-step separation.
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Affiliation(s)
- H B Li
- Department of Botany, The University of Hong Kong, China
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Cao XL, Tian Y, Zhang TY, Ito Y. Supercritical fluid extraction of catechins from Cratoxylum prunifolium dyer and subsequent purification by high-speed counter-current chromatography. J Chromatogr A 2000; 898:75-81. [PMID: 11185625 DOI: 10.1016/s0021-9673(00)00788-3] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.2] [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: 11/23/2022]
Abstract
Supercritical fluid extraction of tea catechins including epigallocatechin-3-O-gallate (EGCG) and epicatechin-3-O-gallate (ECG) from Cratoxylum prunifolium Dyer was performed. The optimization of parameters was carried out using an analytical-scale supercritical fluid extraction (SFE) system designed in our laboratory. Then the extraction was scaled up by 100 times using a preparative SFE system under a set of optimized conditions of 40 degrees C, 25 MPa and modified CO2 with 80% ethanol aqueous solution. The combined yield of EGCG and ECG reached about 1 mg per 1 g of tea leaves where the solubility was near 1.4 x 10(-4) mass fraction of CO2 fluid. EGCG and ECG of high purity (>98%) were obtained from the crude preparative extract by high-speed counter-current chromatography.
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Affiliation(s)
- X L Cao
- Beijing Institute of New Technology Application, China
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Zou WX, Meng JC, Lu H, Chen GX, Shi GX, Zhang TY, Tan RX. Metabolites of Colletotrichum gloeosporioides, an endophytic fungus in Artemisia mongolica. J Nat Prod 2000; 63:1529-1530. [PMID: 11087599 DOI: 10.1021/np000204t] [Citation(s) in RCA: 92] [Impact Index Per Article: 3.8] [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
A new antimicrobial metabolite, named colletotric acid (1), was isolated from a liquid culture of Colletotrichum gloeosporioides, an endophytic fungus colonized inside the stem of Artemisia mongolica. The structure was determined using spectroscopic methods (EIMS and FABMS,(1)H and (13)C NMR, (1)H-(1)H COSY, HMBC, and HMQC). Compound 1 inhibited the growth of Bacillus subtilis, Staphylococcusaureus, and Sarcina lutea with minimal inhibitory concentrations (MICs) of 25, 50, and 50 microg/mL, respectively, and the crop pathogenic fungus Helminthosporium sativum (MIC: 50 microg/mL).
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Affiliation(s)
- W X Zou
- Institute of Functional Biomolecule, State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing 210093, People's Republic of China
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40
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Zhu ML, Lee SR, Zhang TY, Tong P. Modeling of a rotary motor driven by an anisotropic piezoelectric composite laminate. IEEE Trans Ultrason Ferroelectr Freq Control 2000; 47:1561-1574. [PMID: 18238702 DOI: 10.1109/58.883545] [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: 05/25/2023]
Abstract
This paper proposes an analytical model of a rotary motor driven by an anisotropic piezoelectric composite laminate. The driving element of the motor is a three-layer laminated plate. A piezoelectric layer is sandwiched between two anti-symmetric composite laminae. Because of the material anisotropy and the anti-symmetric configuration, torsional vibration can be induced through the inplane strain actuated by the piezoelectric layer. The advantages of the motor are its magnetic field immunity, simple structure, easy maintenance, low cost, and good low-speed performance. In this paper, the motor is considered to be a coupled dynamic system. The analytical model includes the longitudinal and torsional vibrations of the laminate and the rotating motion of the rotor under action of contact forces. The analytical model can predict the overall characteristics of the motor, including the modal frequency and the response of motion of the laminate, the rotating speed of the rotor, the input power, the output power, and the efficiency of the motor. The effects of the initial compressive force, the applied voltage, the moment of rotor inertia, and the frictional coefficient of the contact interface on the characteristics of the motor are simulated and discussed. A selection of the numerical results from the analytical model is confirmed by experimental data.
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Affiliation(s)
- M L Zhu
- Dept. of Mech. Eng., Hong Kong Univ., China
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41
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Murakami T, Zhang TY, Koyanagi Y, Tanaka Y, Kim J, Suzuki Y, Minoguchi S, Tamamura H, Waki M, Matsumoto A, Fujii N, Shida H, Hoxie JA, Peiper SC, Yamamoto N. Inhibitory mechanism of the CXCR4 antagonist T22 against human immunodeficiency virus type 1 infection. J Virol 1999; 73:7489-96. [PMID: 10438838 PMCID: PMC104275 DOI: 10.1128/jvi.73.9.7489-7496.1999] [Citation(s) in RCA: 71] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
We recently reported that a cationic peptide, T22 ([Tyr(5,12), Lys(7)]-polyphemusin II), specifically inhibits human immunodeficiency virus type 1 (HIV-1) infection mediated by CXCR4 (T. Murakami et al., J. Exp. Med. 186:1389-1393, 1997). Here we demonstrate that T22 effectively inhibits replication of T-tropic HIV-1, including primary isolates, but not of non-T-tropic strains. By using a panel of chimeric viruses between T- and M-tropic HIV-1 strains, viral determinants for T22 susceptibility were mapped to the V3 loop region of gp120. T22 bound to CXCR4 and interfered with stromal-cell-derived factor-1alpha-CXCR4 interactions in a competitive manner. Blocking of anti-CXCR4 monoclonal antibodies by T22 suggested that the peptide interacts with the N terminus and two of the extracellular loops of CXCR4. Furthermore, the inhibition of cell-cell fusion in cells expressing CXCR4/CXCR2 chimeric receptors suggested that determinants for sensitivity of CXCR4 to T22 include the three extracellular loops of the coreceptor.
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Affiliation(s)
- T Murakami
- Department of Microbiology and Molecular Virology, Faculty of Medicine, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo 113-8519, Japan
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42
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Yang PC, Liu T, Zhang TY, Fan DS. Effect of substance P on the short-circuit current of rat nasal mucosal epithelium. Ann Otol Rhinol Laryngol 1998; 107:675-9. [PMID: 9716870 DOI: 10.1177/000348949810700809] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Rats were sensitized by intranasal application of toluene diisocyanate as a nasal allergy model. By means of the Using chamber technique, rat nasal epithelial short-circuit current (Isc) was measured. Enhanced Isc of the rat nasal mucosa resulted from stimulation of substance P (SP) in a dose-dependent manner that could be inhibited by pretreatment with NK1 receptor antagonist CP-96345, the H1 receptor antagonist pyrilamine, the H2 receptor antagonist ranitidine, and the neurotoxin tetrodotoxin, respectively, to different extents. The results indicate that SP is able to cause ion secretion of the nasal mucosal epithelium, perhaps by activating mast cells to release histamine. These data suggest that mast cells and sensory nerves participate in the regulation of SP-induced ion secretion during nasal allergy.
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Affiliation(s)
- P C Yang
- Department of Otolaryngology, First Affiliated Hospital, Shanxi Medical University, Taiyuan, People's Republic of China
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43
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Abstract
High-speed counter-current chromatography (HSCCC) was used for the separation and purification of 10-deacetylbaccatin III from the needle extract of Chinese yew (Taxus chinensis). The crude needle extract (500 mg/5 ml) was first separated with a two-phase solvent system composed of n-hexane-ethyl acetate-ethanol-water (2:5:2:5, v/v) and the partially purified fraction was again purified with a different solvent system composed of n-hexane-chloroform-methanol-water (5:25:34:20, v/v). HPLC analysis of the final fraction showed that the purity of 10-deacetylbaccatin (20 mg) was over 98%. The chemical structure was confirmed by fast atom bombardment MS and 1H NMR.
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Affiliation(s)
- X Cao
- Beijing Institute for New Technology Application, China
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44
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Wang ZX, Berson JF, Zhang TY, Cen YH, Sun Y, Sharron M, Lu ZH, Peiper SC. CXCR4 sequences involved in coreceptor determination of human immunodeficiency virus type-1 tropism. Unmasking of activity with M-tropic Env glycoproteins. J Biol Chem 1998; 273:15007-15. [PMID: 9614108 DOI: 10.1074/jbc.273.24.15007] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The interaction of human immunodeficiency virus type 1 (HIV-1) with CD4 and one of a cadre of chemokine receptors triggers conformational changes in the HIV-1 envelope (Env) glycoprotein that lead to membrane fusion. The coreceptor activity of the second extracellular loop of CXCR4, which is restricted to dual tropic and T-tropic strains, was insensitive to the removal of charged residues either singly or in combinations by alanine scanning mutagenesis or to the conversion of acidic residues to lysine. Conversion of Asp-187 to a neutral residue exclusively unmasked activity with M-tropic Env in fusion and infection experiments. Insertion of the D187V mutation into chimeras containing extracellular loop 2 of CXCR4 in a CXCR2 framework also resulted in the acquisition of M-tropic coreceptor activity. The independence of CXCR4 coreceptor activity from charged residues and the extension of its repertoire by removing Asp-187 suggest that this interaction is not electrostatic and that coreceptors have the potential to be utilized by a spectrum of Env, which may be masked by charged amino acids in extracellular domains. These findings indicate that the primary structural determinants of coreceptors that program reactivity with M-, dual, and T-tropic Env are surprisingly subtle and that relatively insignificant changes in CXCR4 can dramatically alter utilization by Env of varying tropism.
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Affiliation(s)
- Z X Wang
- Henry Vogt Cancer Research Institute, James Graham Brown Cancer Center, University of Louisville, Louisville, Kentucky
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45
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Abstract
A multidimensional counter-current chromatographic system was set up for the first time with two sets of high-speed counter-current chromatography instruments. This system was successfully applied to the preparative separation of isorhamnetin, kaempferol and quercetin from crude flavone aglycones of Ginkgo biloba L. and Hippophae rhamnoides L. with a two-phase solvent system composed of chloroform-methanol-water (4:3:2, v/v/v).
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Affiliation(s)
- F Yang
- Beijing Institute of New Technology Application, China
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46
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Cao X, Tian Y, Zhang TY, Ito Y. Semi-preparative separation and purification of taxol analogs by high-speed countercurrent chromatography. Prep Biochem Biotechnol 1998; 28:79-87. [PMID: 9516644 DOI: 10.1080/10826069808010128] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [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: 02/06/2023]
Abstract
High-speed countercurrent chromatography (HSCCC) was applied to the semi-preparative separation of taxol and its analogs, such as cephalomannine and 7-epi-10-deacetyltaxol from the extract of the bark of Taxus yunnannesis. The experiments were performed with a quaternary two-phase solvent system composed of n-hexane-thyl acetate-ethanol-water through two steps. In the first step, the four components were separated into two groups at a volume ratio of 1:1:1:1 and, in the second step, two components in each group were separated at different volume ratios of 3:3:2:3 or 4:4:3:4. The present method also allows consecutive injections with reproducible results. HPLC analysis showed that the purity of the four components obtained from a partially purified sample, containing taxol at 10%, ranged from 85 to 99%. The results indicated that HSCCC can be effectively used for the semi-preparative separation and purification of taxol and its analogs.
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Affiliation(s)
- X Cao
- Beijing Institute of New Technology Application, China
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47
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MESH Headings
- Amino Acid Sequence
- Animals
- Antigens, Protozoan
- Baculoviridae/genetics
- Base Sequence
- Carrier Proteins/chemistry
- Carrier Proteins/genetics
- Carrier Proteins/metabolism
- Cell Line
- Cell Membrane/metabolism
- Chemokine CCL5/metabolism
- Chemokine CXCL1
- Chemokines, CXC
- Chemotactic Factors/metabolism
- DNA Primers
- Flow Cytometry
- Growth Substances/metabolism
- Humans
- Intercellular Signaling Peptides and Proteins
- Interleukin-8/metabolism
- Molecular Sequence Data
- Polymerase Chain Reaction
- Protein Engineering/methods
- Protozoan Proteins
- Receptors, CCR1
- Receptors, Cell Surface/chemistry
- Receptors, Cell Surface/genetics
- Receptors, Cell Surface/metabolism
- Receptors, Chemokine/chemistry
- Receptors, Chemokine/genetics
- Receptors, Chemokine/isolation & purification
- Receptors, Chemokine/metabolism
- Recombinant Fusion Proteins/chemistry
- Recombinant Fusion Proteins/isolation & purification
- Recombinant Fusion Proteins/metabolism
- Spodoptera/genetics
- Structure-Activity Relationship
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Affiliation(s)
- S C Peiper
- Department of Biochemistry and Molecular Biology, University of Louisville, Kentucky 40292, USA
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48
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Doranz BJ, Lu ZH, Rucker J, Zhang TY, Sharron M, Cen YH, Wang ZX, Guo HH, Du JG, Accavitti MA, Doms RW, Peiper SC. Two distinct CCR5 domains can mediate coreceptor usage by human immunodeficiency virus type 1. J Virol 1997; 71:6305-14. [PMID: 9261347 PMCID: PMC191903 DOI: 10.1128/jvi.71.9.6305-6314.1997] [Citation(s) in RCA: 169] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
The chemokine receptor CCR5 is the major fusion coreceptor for macrophage-tropic strains of human immunodeficiency virus type 1 (HIV-1). To define the structures of CCR5 that can support envelope (Env)-mediated membrane fusion, we analyzed the activity of homologs, chimeras, and mutants of human CCR5 in a sensitive gene reporter cell-cell fusion assay. Simian, but not murine, homologs of CCR5 were fully active as HIV-1 fusion coreceptors. Chimeras between CCR5 and divergent chemokine receptors demonstrated the existence of two distinct regions of CCR5 that could be utilized for Env-mediated fusion, the amino-terminal domain and the extracellular loops. Dual-tropic Env proteins were particularly sensitive to alterations in the CCR5 amino-terminal domain, suggesting that this domain may play a pivotal role in the evolution of coreceptor usage in vivo. We identified individual residues in both functional regions, Asp-11, Lys-197, and Asp-276, that contribute to coreceptor function. Deletion of a highly conserved cytoplasmic motif rendered CCR5 incapable of signaling but did not abrogate its ability to function as a coreceptor, implying the independence of fusion and G-protein-mediated chemokine receptor signaling. Finally, we developed a novel monoclonal antibody to CCR5 to assist in future studies of CCR5 expression.
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Affiliation(s)
- B J Doranz
- Department of Pathology, University of Pennsylvania, Philadelphia 19104, USA
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49
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Yang PC, Liu T, Zhang TY, Fan DS. The effect of the H2 antagonist cimetidine on the numbers of CD4+ and CD8+ cells in the nasal mucosa of patients with allergic rhinitis. Clin Otolaryngol 1997; 22:93-5. [PMID: 9160916 DOI: 10.1046/j.1365-2273.1997.d01-294.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [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: 02/04/2023]
Abstract
This paper reports the effects of the H2 antagonist cimetidine on the number of CD4+ and CD8+ cells in nasal mucosa and the IgE level of nasal secretions in patients with allergic rhinitis. The results showed the numbers of CD4+ cells were greater than the numbers of CD8+ cells in nasal mucosa, both in the patients with allergic rhinitis and normal subjects, but the ratio of CD4+:CD8+ cells was much higher in the patients with allergic rhinitis. After treatment with cimetidine locally for 4 weeks, the numbers of CD4+ cells fell and the numbers of CD8+ cells increased in the patients with allergic rhinitis. The high IgE level of nasal secretion of the patients with allergic rhinitis was much reduced after treatment with cimetidine. The results suggest that there are high numbers of CD4+ cells and lower numbers of CD8+ cells in the nasal mucosa and a high level of IgE in the nasal secretions of the patients with allergic rhinitis. Treatment with cimetidine locally may be of some value to relieve the clinical symptoms of allergic rhinitis.
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Affiliation(s)
- P C Yang
- Department of Otolaryngology, The First Affiliated Hospital, Shanxi Medical College, Taiyan, People's Republic of China
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50
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Liaw KL, Hsing AW, Chen CJ, Schiffman MH, Zhang TY, Hsieh CY, Greer CE, You SL, Huang TW, Wu TC. Human papillomavirus and cervical neoplasia: a case-control study in Taiwan. Int J Cancer 1995; 62:565-71. [PMID: 7665227 DOI: 10.1002/ijc.2910620513] [Citation(s) in RCA: 80] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
As part of a large-scale, community-based cervical neoplasia screening project in rural Taiwan, a case-control study was undertaken to evaluate the etiologic role of human papillomavirus (HPV) infection in this mainly monogamous (2% reported having multiple sexual partners) female population. A total of 88 biopsy-confirmed cases and 261 cytologically normal controls were selected for the study. The case group included 40 cases of cervical intraepithelial neoplasia (CIN) 1, 9 of CIN 2, 36 of CIN 3 and 3 cases of invasive cancer. Cervical swabs collected at screening from study subjects were tested for HPV DNA by an LI consensus primer polymerase chain reaction (PCR)-based technique. HPV DNA was found in 92% of high-grade cases (CIN 2-3 and invasive cancer); 54% of low-grade cases (CIN 1); and 9% of controls. HPV was significantly associated with both high-grade and low-grade cervical neoplasia. As reported in Western countries, HPV 16 was the predominant type among HPV-positive high-grade cases. However, HPVs 52 and/or 58 combined were the most common types among HPV-positive low-grade cases and controls. Among women without any high-risk HPV infection (types 16, 18, 31 or 45), those with multiple-type HPV infection had a higher risk for high-grade cervical neoplasia than those with single-type infection. Overall, 91% of high-grade cases and 50% of low-grade cases could be attributed to HPV infection. Our results show that, even in this monogamous population, HPV is the major risk factor for high-grade cervical neoplasia.
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Affiliation(s)
- K L Liaw
- Johns Hopkins University, Baltimore, MD, USA
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