1
|
Yu YY, Song CJ, Sun WL, Wu JC, Lei LH. [Management of soft and hard tissue defects in aesthetic zone in severe periodontitis with periodontal-orthodontic treatment: a case report]. Zhonghua Kou Qiang Yi Xue Za Zhi 2023; 58:1067-1072. [PMID: 37818542 DOI: 10.3760/cma.j.cn112144-20230815-00078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 10/12/2023]
Affiliation(s)
- Y Y Yu
- Department of Periodontics, The Second Affiliated Hospital of Zhejiang University School of Medicine, School of Stomatology, and Key Laboratory of Oral Biomedical Research of Zhejiang Province, Hangzhou 310009, China
| | - C J Song
- Department of Periodontics, The Second Affiliated Hospital of Zhejiang University School of Medicine, School of Stomatology, and Key Laboratory of Oral Biomedical Research of Zhejiang Province, Hangzhou 310009, China
| | - W L Sun
- Department of Periodontics, The Second Affiliated Hospital of Zhejiang University School of Medicine, School of Stomatology, and Key Laboratory of Oral Biomedical Research of Zhejiang Province, Hangzhou 310009, China
| | - J C Wu
- Department of Orthopedics, Hangzhou Mingzhou Hospital, Hangzhou 310009, China
| | - L H Lei
- Department of Periodontics, The Second Affiliated Hospital of Zhejiang University School of Medicine, School of Stomatology, and Key Laboratory of Oral Biomedical Research of Zhejiang Province, Hangzhou 310009, China
| |
Collapse
|
2
|
Wei R, Yu YY, Tang XD. [The surgical classification and surgical strategy for en bloc resection of spine tumor]. Zhonghua Wai Ke Za Zhi 2023; 61:937-943. [PMID: 37767658 DOI: 10.3760/cma.j.cn112139-20230716-00011] [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: 09/29/2023]
Abstract
En bloc resection of spine tumor is the essential treatment method for primary malignant spine tumor,primary aggressive spine tumor and solitary spine metastasis.It can achieve good local control and improve the prognosis.However,given the complex anatomic structure and major adjacent tissue and organ of the spine,en bloc resection of spine tumor remains the research hotspot in surgical treatment of spine tumor.On the basis of adequate surgical classification and surgical strategy,experienced surgical team for spine tumor can achieve good surgical margin while decreasing the morbidity of the en bloc resection of spine tumor.However,the details of surgical classification and surgical strategy require further study.
Collapse
Affiliation(s)
- R Wei
- Musculoskeletal Tumor Center,Peking University People's Hospital,Beijing 100044,China
| | - Y Y Yu
- Musculoskeletal Tumor Center,Peking University People's Hospital,Beijing 100044,China
| | - X D Tang
- Musculoskeletal Tumor Center,Peking University People's Hospital,Beijing 100044,China
| |
Collapse
|
3
|
Chen DR, Zhang B, Yu YY, Liu TY, Li S, Liu XY. [Ulcer intraluminal isolation in refractory duodenal ulcer with bleeding]. Zhonghua Wei Chang Wai Ke Za Zhi 2023; 26:878-880. [PMID: 37709698 DOI: 10.3760/cma.j.cn441530-20221115-00468] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 09/16/2023]
|
4
|
Wang YM, Gao SJ, Yu YY, Liu L, Meng J. [Three cases of occupational acute trimethyltin chloride poisoning]. Zhonghua Lao Dong Wei Sheng Zhi Ye Bing Za Zhi 2023; 41:546-549. [PMID: 37524681 DOI: 10.3760/cma.j.cn121094-20220414-00195] [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: 08/02/2023]
Abstract
Trimethyltin chloride is a highly toxic substance, which is absorbed through respiratory tract, skin and digestive tract, with central nervous system injury as the main clinical manifestations, and can be accompanied by damage to various organs. In this paper, the treatment process of 3 patients with acute trimethyltin chloride poisoning was reviewed, and their clinical manifestations, auxiliary examination, diagnosis and treatment were analyzed. Three patients were misdiagnosed as mental abnormality, encephalitis, and hepatic encephalopathy in different hospitals in the early stage of medical treatment, suggesting that clinicians should pay attention to the occupational contact history of poisoned patients and conduct toxicant detection in time to avoid misdiagnosis and mistreatment.
Collapse
Affiliation(s)
- Y M Wang
- Department of Occupational Diseases, Weifang People's Hospital, Weifang 261041, China
| | - S J Gao
- Department of Occupational Diseases, Weifang People's Hospital, Weifang 261041, China
| | - Y Y Yu
- Department of Occupational Diseases, Weifang People's Hospital, Weifang 261041, China
| | - L Liu
- Department of Occupational Diseases, Weifang People's Hospital, Weifang 261041, China
| | - J Meng
- Department of Occupational Diseases, Weifang People's Hospital, Weifang 261041, China
| |
Collapse
|
5
|
Xu JH, Yu YY, Xu XY. [Research progress on cirrhosis reversal and recompensation]. Zhonghua Gan Zang Bing Za Zhi 2023; 31:673-676. [PMID: 37580245 DOI: 10.3760/cma.j.cn501113-20230513-00220] [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: 08/16/2023]
Abstract
Previously, liver lesions in cirrhosis were considered irreversible, especially because the condition aggravated gradually after entering the decompensated phase, thus making it difficult to return to the compensated phase. At present, more and more evidence shows that some patients with decompensated liver cirrhosis can be recompensated after the cause is controlled and complications are managed. This article explores the research progress related to LC reversal and recompensation from three aspects: liver histopathology, liver function, and clinical complications.
Collapse
Affiliation(s)
- J H Xu
- Department of Infectious Diseases, Peking University First Hospital, Beijing 100034, China
| | - Y Y Yu
- Department of Infectious Diseases, Peking University First Hospital, Beijing 100034, China
| | - X Y Xu
- Department of Infectious Diseases, Peking University First Hospital, Beijing 100034, China
| |
Collapse
|
6
|
Ding LN, Yu YY, Ma CJ, Lei CJ, Zhang HB. SOX2-associated signaling pathways regulate biological phenotypes of cancers. Biomed Pharmacother 2023; 160:114336. [PMID: 36738502 DOI: 10.1016/j.biopha.2023.114336] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Revised: 01/20/2023] [Accepted: 01/27/2023] [Indexed: 02/05/2023] Open
Abstract
SOX2 is a transcription factor involved in multiple stages of embryonic development. In related reports, SOX2 was found to be abnormally expressed in tumor tissues and correlated with clinical features such as TNM staging, tumor grade, and prognosis in patients with various cancer types. In most cancer types, SOX2 is a tumor-promoting factor that regulates tumor progression and metastasis primarily by maintaining the stemness of cancer cells. In addition, SOX2 also regulates the proliferation, apoptosis, invasion, migration, ferroptosis and drug resistance of cancer cells. However, SOX2 acts as a tumor suppressor in some cases in certain cancer types, such as gastric and lung cancer. These key regulatory functions of SOX2 involve complex regulatory networks, including protein-protein and protein-nucleic acid interactions through signaling pathways and noncoding RNA interactions, modulating SOX2 expression may be a potential therapeutic strategy for clinical cancer patients. Therefore, we sorted out the phenotypes related to SOX2 in cancer, hoping to provide a basis for further clinical translation.
Collapse
Affiliation(s)
- L N Ding
- Department of Oncology, the Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Y Y Yu
- Department of Oncology, the Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China; Department of Oncology, Guangdong Provincial Hospital of Chinese Medicine, Guangzhou, China
| | - C J Ma
- Department of Oncology, the Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China; Department of Oncology, Guangdong Provincial Hospital of Chinese Medicine, Guangzhou, China
| | - C J Lei
- Department of Oncology, the Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - H B Zhang
- Department of Oncology, the Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China; Department of Oncology, Guangdong Provincial Hospital of Chinese Medicine, Guangzhou, China; Guangdong-Hong Kong-Macau Joint Lab on Chinese Medicine and Immune Disease Research, Guangzhou, China; Guangdong Provincial Key Laboratory of Clinical Research on Traditional Chinese Medicine Syndrome, Guangzhou, China; State Key Laboratory of Dampness Syndrome of Chinese Medicine, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
| |
Collapse
|
7
|
Wang MM, Yu YY, Jin W, Ma P, Gou YP. [Applications of collagen extrafibrillar demineralization in dentin bonding]. Zhonghua Kou Qiang Yi Xue Za Zhi 2023; 58:81-85. [PMID: 36642457 DOI: 10.3760/cma.j.cn112144-20220919-00494] [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: 01/17/2023]
Abstract
The existing dentin bonding systems based on acid-etching technique lead to the loss of both extrafibrillar and intrafibrillar minerals from dentin collagen, causing excessive demineralization. Because resin monomers can not infiltrate the intrafibrillar spaces of demineralized collagen matrix, degradation of exposed collagen and resin hydrolysis subsequently occur within the hybrid layer, which seriously jeopardizing the longevity of resin-dentin bonding. Collagen extrafibrillar demineralization can effectively avoid the structural defects within the resin-dentin interface caused by acid-etching technique and improve the durability of resin-dentin bonding, by preserving intrafibrillar minerals and selectively demineralizing extrafibrillar dentin. The mechanism and research progress of collagen extrafibrillar demineralization in dentin bonding are reviewed in the paper.
Collapse
Affiliation(s)
- M M Wang
- Department of Endodontics, School and Hospital of Stomatology, Lanzhou University & Key Laboratory of Dental Maxillofacial Reconstruction and Biological Intelligence Manufacturing, Lanzhou 730000, China
| | - Y Y Yu
- Department of Endodontics, School and Hospital of Stomatology, Lanzhou University & Key Laboratory of Dental Maxillofacial Reconstruction and Biological Intelligence Manufacturing, Lanzhou 730000, China
| | - W Jin
- Department of Endodontics, School and Hospital of Stomatology, Lanzhou University & Key Laboratory of Dental Maxillofacial Reconstruction and Biological Intelligence Manufacturing, Lanzhou 730000, China
| | - P Ma
- Department of Endodontics, School and Hospital of Stomatology, Lanzhou University & Key Laboratory of Dental Maxillofacial Reconstruction and Biological Intelligence Manufacturing, Lanzhou 730000, China
| | - Y P Gou
- Department of Endodontics, School and Hospital of Stomatology, Lanzhou University & Key Laboratory of Dental Maxillofacial Reconstruction and Biological Intelligence Manufacturing, Lanzhou 730000, China
| |
Collapse
|
8
|
Xu JH, Fan YN, Ji TT, Liang RY, Yu YY. [Clinical characteristics of 500 hospitalized patients with liver cirrhosis: a retrospective analysis from a tertiary hospital in Beijing]. Zhonghua Gan Zang Bing Za Zhi 2022; 30:541-545. [PMID: 35764547 DOI: 10.3760/cma.j.cn501113-20201126-00631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Objective: To understand the clinical characteristics of hospitalized patients with liver cirrhosis, so as to provide theoretical basis for disease diagnosis and treatment, formulation of intervention measures, and improve the level of disease diagnosis and treatment. Methods: Hospitalized patients who were initially diagnosed with liver cirrhosis at Peking University First Hospital from August 2017 to December 2018 were selected retrospectively as the research objects. Liver cirrhosis demographic data, etiology, severity classification, incidence of complications, diagnosis and prognosis were recorded. Statistical analysis was performed using SPSS software. Results: Among all liver cirrhosis cases, there were 291 males and 209 females, with a male-to-female ratio of 1.4:1 and an age of 59.5±12.9 years as at August 2017 to December 2018. HBV infection, alcoholic liver disease, and autoimmune liver diseases were the most common etiology of liver cirrhosis. HBV infection alone, HBV infection combined with other factors, alcoholic liver disease alone, alcoholic liver disease combined with other factors, autoimmune liver disease alone, and autoimmune liver disease combined with other factors were presented in 163 (32.6%), 57 (11.4%), 47 (9.4%), 63 (12.6%), 85 (17.0%), and 22 (4.4.0%) cases, respectively. Ascites (221 cases, 44.2%), followed by esophagogastric varices (214 cases, 42.8%), and other including hypersplenism (137 cases), liver cancer (126 cases), upper digestive system tract hemorrhage (66 cases), hepatic encephalopathy (40 cases), infection (37 cases), portal vein thrombosis (23 cases), hepatorenal syndrome (20 cases) were the most common complications. The most common site of infection was the abdominal cavity (20 cases), accounting for 54.1%; followed by respiratory tract infection (8 cases), accounting for 21.6% in patients with liver cirrhosis with concurrent infection. Among them, there were 32 cases of bacterial infection alone, one case of bacterial infection combined with fungal infection, one case of bacterial infection combined with viral infection, and three cases of unknown pathogens. There were 69 cases in Child Pugh grade C, and the average hospitalization times were 12.6 days in terms of prognosis. There were total seven cases of death, of which five cases were due to upper gastrointestinal hemorrhage and two due to hepatic encephalopathy. Conclusion: HBV infection, ascites, and upper gastrointestinal bleeding were the most common etiologies, complications, and causes of death in patients with liver cirrhosis at our hospital.
Collapse
Affiliation(s)
- J H Xu
- Department of Infectious Diseases, Peking University First Hospital, Beijing 100034, China
| | - Y N Fan
- Peking University Health Science Center, Peiking University First Hospital, Beijing 100034, China
| | - T T Ji
- Department of Infectious Diseases, Peking University First Hospital, Beijing 100034, China
| | - R Y Liang
- Department of Infectious Diseases, Peking University First Hospital, Beijing 100034, China
| | - Y Y Yu
- Department of Infectious Diseases, Peking University First Hospital, Beijing 100034, China
| |
Collapse
|
9
|
Song J, Gong SJ, Yu YY. Malpositioning of a venous cannula into the contralateral femoral vein in VA-ECMO. Med Intensiva 2022; 46:236-237. [PMID: 35461671 DOI: 10.1016/j.medine.2019.12.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Accepted: 12/10/2019] [Indexed: 06/14/2023]
Affiliation(s)
- J Song
- Department of Intensive Care Unit, Zhejiang Hospital, Hangzhou, Zhejiang, China
| | - S J Gong
- Department of Intensive Care Unit, Zhejiang Hospital, Hangzhou, Zhejiang, China.
| | - Y Y Yu
- Department of Intensive Care Unit, Zhejiang Hospital, Hangzhou, Zhejiang, China
| |
Collapse
|
10
|
Xu JH, Yu YY, Xu XY. [Clinical features of Epstein-Barr virus infection associated to liver injury in adolescents and adults]. Zhonghua Gan Zang Bing Za Zhi 2021; 29:915-918. [PMID: 34814383 DOI: 10.3760/cma.j.cn501113-20210902-00445] [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: 06/13/2023]
Abstract
Epstein-Barr virus (EBV) infection is closely associated to liver injury with diverse clinical features in adolescents and adults. It is often manifested as infectious mononucleosis syndrome, sometimes causing self-limited acute hepatitis, with mild to moderate elevation of liver transaminases, and relative increase in age-related conditions. EBV infection can also cause cholestatic hepatitis, with elevated alkaline phosphatase and γ-glutamyltransferase as the main manifestations, accompanied by varying degrees of jaundice. A small number of patients with severe EBV infection may experience liver failure, and if left untreated in time, it may lead to high mortality. In addition, EBV infection is also associated with chronic hepatitis, liver cirrhosis, autoimmune liver disease, etc.
Collapse
Affiliation(s)
- J H Xu
- Department of Infectious Diseases, Peking University First Hospital, Beijing 100034, China
| | - Y Y Yu
- Department of Infectious Diseases, Peking University First Hospital, Beijing 100034, China
| | - X Y Xu
- Department of Infectious Diseases, Peking University First Hospital, Beijing 100034, China
| |
Collapse
|
11
|
Qin LX, Xu JH, Zhao XY, Wang K, Qiu JX, Yu YY. [A case of primary biliary cholangitis stage I combined with portal hypertension]. Zhonghua Gan Zang Bing Za Zhi 2021; 29:799-802. [PMID: 34517464 DOI: 10.3760/cma.j.cn501113-20200814-00456] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- L X Qin
- Department of Infectious Diseases, Peking University First Hospital, Beijing 100034, China
| | - J H Xu
- Department of Infectious Diseases, Peking University First Hospital, Beijing 100034, China
| | - X Y Zhao
- Liver Diseases Centre, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China
| | - K Wang
- Department of Medical Imaging, Peking University First Hospital, Beijing 100034, China
| | - J X Qiu
- Department of Medical Imaging, Peking University First Hospital, Beijing 100034, China
| | - Y Y Yu
- Department of Infectious Diseases, Peking University First Hospital, Beijing 100034, China
| |
Collapse
|
12
|
Yu YY, Wang SY, Tu B, Shen YJ, Qiu Q, Luan JQ, Wang FS, Meng FP, Shi M. [Effects of programmed death receptor-1 antibody in patients with hepatitis B-associated liver cancer]. Zhonghua Gan Zang Bing Za Zhi 2021; 29:659-665. [PMID: 34371536 DOI: 10.3760/cma.j.cn501113-20210705-00317] [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 effect of programmed death receptor (PD)-1 antibody therapy in patients with hepatitis B-associated liver cancer. Methods: Data of 29 chronically infected HBV patients with liver cancer who received PD-1 antibody combined with tyrosine kinase inhibitor in the Department of Infectious Diseases of the Fifth Medical Center of PLA General Hospital from March 2020 to January 2021 were selected. At the same time, all of the above-mentioned hepatitis B virus (HBV) patients were treated with nucleos(t)ide analogues. Patients clinical diagnostic data, laboratory test results, tumor response and the incidence of adverse reactions were collected retrospectively to understand the overall safety, therapeutic anti-tumor effect, HBV changes condition and the correlation between HBV changes and anti-tumor PD-1 antibody efficacy, high viral load treatment condition, and HBV reactivation safety issues. Statistical analysis was performed by non-parametric rank sum test. Results: Therapeutic anti-tumor effect and safety profile were good in patients. The complete remission rate was reached 27.6%. Adverse reactions were mostly mild, and the incidence of serious adverse reactions was low. After 12 weeks of follow-up, HBV DNA and hepatitis B surface antigen (HBsAg) was quantitatively decreased (P < 0.05). HBV DNA and HBsAg were decreased more significantly in patients with progressive disease (PD), stable disease (SD) and partial response (PR) (P < 0.05). Five patients with HBV DNA ≥ 10(4) IU/ml had responded well to the tumor treatment without serious adverse reactions. One patient had a slight increase in HBV DNA and alanine aminotransferase, while there was no HBV reactivation and correlated liver damage. Conclusion: Patients with HBV-associated liver cancer who received combined therapy have good anti-tumor efficacy and safety profile. PD-1 treatment has a certain effect on HBV. Compared with non-responders, patients with tumor response have better antiviral treatment efficacy. The safety of treatment in patients with high viral load is manageable, and there are no safety issues related to HBV reactivation.
Collapse
Affiliation(s)
- Y Y Yu
- Peking University 302 Clinical Medical School, Beijing 100039, China Department of Infectious Diseases, The Fifth Medical Center of Chinese PLA General Hospital, National Clinical Research Center for Infectious Diseases, Beijing 100039, China
| | - S Y Wang
- Department of Infectious Diseases, The Fifth Medical Center of Chinese PLA General Hospital, Infectious Diseases Division 4 Ward, Beijing 100039, China
| | - B Tu
- Department of Infectious Diseases, The Fifth Medical Center of Chinese PLA General Hospital, Infectious Diseases Division 4 Ward, Beijing 100039, China
| | - Y J Shen
- Department of Infectious Diseases, The Fifth Medical Center of Chinese PLA General Hospital, Infectious Diseases Division 4 Ward, Beijing 100039, China
| | - Q Qiu
- Department of Infectious Diseases, The Fifth Medical Center of Chinese PLA General Hospital, Infectious Diseases Division 4 Ward, Beijing 100039, China
| | - J Q Luan
- Department of Infectious Diseases, The Fifth Medical Center of Chinese PLA General Hospital, Infectious Diseases Division 4 Ward, Beijing 100039, China
| | - F S Wang
- Department of Infectious Diseases, The Fifth Medical Center of Chinese PLA General Hospital, Infectious Diseases Division 4 Ward, Beijing 100039, China
| | - F P Meng
- Department of Infectious Diseases, The Fifth Medical Center of Chinese PLA General Hospital, National Clinical Research Center for Infectious Diseases, Beijing 100039, China Department of Infectious Diseases, The Fifth Medical Center of Chinese PLA General Hospital, Infectious Diseases Division 4 Ward, Beijing 100039, China
| | - M Shi
- Peking University 302 Clinical Medical School, Beijing 100039, China Department of Infectious Diseases, The Fifth Medical Center of Chinese PLA General Hospital, National Clinical Research Center for Infectious Diseases, Beijing 100039, China
| |
Collapse
|
13
|
Kuang D, Yu YY, Yang Y, Gao Y, Tu C, Wang L. [High frequency hearing loss detection rate in occupational noise exposed workers in China: a Meta-analysis]. Zhonghua Lao Dong Wei Sheng Zhi Ye Bing Za Zhi 2021; 39:184-189. [PMID: 33781033 DOI: 10.3760/cma.j.cn121094-20200306-00106] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: A Meta-analysis was used to evaluate the high frequency hearing loss detection rate, its area and time distributions in occupational noise exposed workers in China to provide evidence for the prevention and control of occupational noise-induced deafness. Methods: From February to April 2020, the number of hearing tests and the number of binaural high frequency average hearing threshold ≥40 dB of workers exposed to noise in key occupational disease monitoring and occupational health risk assessment project in China was collected from China National Knowledge Infrastructure (CNKI) , VIP database and PubMed database. The retrieval time was set from the establishment of the database to February 28, 2020. The R 3.6.2 software was used to calculate the pooled high frequency hearing loss detection rate. Results: A total of 28 studies, included 34 data and 1259571 occupational noise exposed workers, were enrolled. The articles covered 16 provinces in 2015-2018. The pooled high frequency hearing loss detection rate in occupational noise exposed workers was 9.45% (95%CI: 7.64%-11.64%) . The high frequency hearing loss detection rate (10.54%) was higher in 2018 than other years (2017: 10.17%, 2016: 9.21%, 2015: 7.88%) . The high frequency hearing loss detection rate (12.23%) was higher in central China than in eastern (10.21%) , western (7.91%) and north-eastern (5.21%) China. Conclusion: The overall high frequency hearing loss detection rate in occupational noise exposed workers is generally high in China. It is important to strengthen the hearing protection in occupational noise exposed workers to facilitate the occupational noise-induced deafness prevention and control in China.
Collapse
Affiliation(s)
- D Kuang
- Chengdu Center for Disease Control and Prevention, Chengdu 610041, China
| | - Y Y Yu
- High-tech District Center for Disease Control and Prevention of Chengdu City, Chengdu 610093, China
| | - Y Yang
- Chengdu Center for Disease Control and Prevention, Chengdu 610041, China
| | - Y Gao
- Chengdu Center for Disease Control and Prevention, Chengdu 610041, China
| | - C Tu
- Chengdu Center for Disease Control and Prevention, Chengdu 610041, China
| | - L Wang
- Chengdu Center for Disease Control and Prevention, Chengdu 610041, China
| |
Collapse
|
14
|
Abstract
Liver cirrhosis is the final stage of many chronic liver diseases, and is still a heavy disease burden. The proportion of liver cirrhosis caused by the hepatitis B virus is declining, while that caused by the non-alcoholic fatty liver disease (metabolic-associated fatty liver disease) is rising. Several predictive models and techniques such as transient elastography have been used for the early non-invasive evaluation of liver cirrhosis. Effective etiological treatment and complication management are the possible key to reverse and recompense liver function during liver cirrhosis treatment. In recent years, the effectiveness and availability of anti-hepatitis B and C virus drugs have been significantly improved, which provides the basis for effective etiological treatment of liver cirrhosis. However, there is still a lack of etiological treatment measures for non-alcoholic fatty liver disease. Therefore, in addition to focusing on common complications, we should also manage "rare" complications. This article reviews the changes in epidemiological characteristics, the update of the natural history concepts, diagnostic evaluation methods, and the treatment measures for liver cirrhosis.
Collapse
Affiliation(s)
- J H Xu
- Department of Infectious Diseases, Peking University First Hospital, Beijing 100034, China
| | - Y Y Yu
- Department of Infectious Diseases, Peking University First Hospital, Beijing 100034, China
| | - X Y Xu
- Department of Infectious Diseases, Peking University First Hospital, Beijing 100034, China
| |
Collapse
|
15
|
Fan YN, Ji TT, Liang RY, Yu YY, Xu JH. [Retrospective analysis of risk factors of liver cirrhosis combined with overt hepatic encephalopathy: a single -center case-control study]. Zhonghua Gan Zang Bing Za Zhi 2021; 29:133-136. [PMID: 33685081 DOI: 10.3760/cma.j.cn501113-20200708-00378] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To explore the risk factors of overt hepatic encephalopathy (OHE) in patients with liver cirrhosis. Methods: A retrospective study was designed. Patients with liver cirrhosis combined with /without OHE who were hospitalized to our hospital during the same period were selected as the case/control group. Clinical and laboratory data of both groups of patients were compared to analyze the risk factors affecting the occurrence of OHE. SPSS software was used for statistical analysis. A t-test or rank-sum test was used to compare the measurement data. Chi-square test or Fisher's exact probability method was used to compare the count data. Logistic regression was used for multivariate analysis. Results: A total of 500 patients with liver cirrhosis diagnosed in our hospital from August 2017 to December 2018 were selected as the case group, and 40 cases with cirrhosis without OHE who were hospitalized during the same period were randomly selected as the control group. The gender composition and age of the case and control group were comparable. Viral hepatitis (mainly hepatitis B) was the main etiology of liver cirrhosis in both groups. There were 52.5% patients in the case group and 57.5% patients in the control group, respectively. Alcoholic liver disease, autoimmune liver disease and so on were the other included causes. With regard to blood biochemical indicators, the serum creatinine levels of both groups were comparable, but in the case group, the serum total bilirubin level was higher (34.30 μmol / L vs. 18.65 μ mol/L, Z = -3.185, P < 0.05), while the serum sodium level was lower (137.00 mmol/L vs. 140.08 mmol/L, Z = -2.348, P < 0.05), and the prothrombin time was longer (14.60 s vs. 12.20 s) s. 078, P < 0.05), and international normalized ratio (1.33 vs. 1.07, Z = - 5.632, P < 0.05), and serum albumin level (30.6 g/L vs. 35.6 g/L, t = 3.386, P < 0.05) was lower. In terms of complications, patients in the case group had a higher proportion of combined gastrointestinal bleeding (30.0% vs. 10.0%, χ(2) = 5.000, P < 0.05), ascites (87.5% vs. 30.0%, χ(2) = 27.286, P < 0.05) and secondary infection (32.5% vs. 10.0%, χ(2) = 7.813, P < 0.05). In terms of severity classification, the proportion of Child-Pugh C in the case group was higher (62.5% vs. 10.0%, χ(2) =26.593, P < 0.05). In terms of outcome, there were 3 deaths in the case group and no deaths in the control group. Multivariate analysis showed that Child-Pugh class C (OR = 12.696), and combined ascites (OR = 10.655) were an independent risk factor for OHE in patients with liver cirrhosis. Conclusion: Our single-center retrospective clinical study shows that patients with cirrhosis combined with OHE are more critical and have more complications. In order to promptly diagnose and treat OHE, more attention should be paid to patients with combined ascites and Child-Pugh class C.
Collapse
Affiliation(s)
- Y N Fan
- Department of Infectious Diseases, Peking University First Hospital, Beijing 100034
| | - T T Ji
- Department of Infectious Diseases, Peking University First Hospital, Beijing 100034
| | - R Y Liang
- Department of Infectious Diseases, Peking University First Hospital, Beijing 100034
| | - Y Y Yu
- Department of Infectious Diseases, Peking University First Hospital, Beijing 100034
| | - J H Xu
- Department of Infectious Diseases, Peking University First Hospital, Beijing 100034
| |
Collapse
|
16
|
Wang CJ, Shen Z, Yu YY, Xiao SM, Feng J, Ge XH, Zheng HQ, Yang GG. [A new method to improve the quality of bowel preparation before colonoscopy]. Zhonghua Wei Chang Wai Ke Za Zhi 2021; 23:1203-1206. [PMID: 33353278 DOI: 10.3760/cma.j.cn.441530-20191230-00531] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|
17
|
Hu YY, Ji DP, Yu YY, Li YJ, Li B, Hou GH, Zhang XD, Duan CC, Hu RB, Xu J. Evaluation of SARS-CoV-2 in the female reproductive tract of COVID-19 patients: A prospective study. J BIOL REG HOMEOS AG 2020; 34:1885-1888. [PMID: 33108863 DOI: 10.23812/20-352-l] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Affiliation(s)
- Y Y Hu
- The Department of Obstetrics and Gynecology, The Fourth Affiliated Hospital, Zhejiang University School of Medicine, Yiwu, Zhejiang, China
| | - D P Ji
- The Department of Obstetrics and Gynecology, Shangxi District Medical Community Of Yiwu Central Hospital, Yiwu,Zhejiang,China
| | - Y Y Yu
- The Department of Obstetrics and Gynecology, The Fourth Affiliated Hospital, Zhejiang University School of Medicine, Yiwu, Zhejiang, China
| | - Y J Li
- The Clinical Laboratory of the Fourth Affiliated Hospital, Zhejiang University School of Medicine, Yiwu, Zhejiang,China
| | - B Li
- The Department of Infectious Diseases, The Fourth Affiliated Hospital, Zhejiang University School of Medicine, Yiwu, Zhejiang, China
| | - G H Hou
- The Department of Infectious Diseases, The Fourth Affiliated Hospital, Zhejiang University School of Medicine, Yiwu, Zhejiang, China
| | - X D Zhang
- The Clinical Laboratory of the Fourth Affiliated Hospital, Zhejiang University School of Medicine, Yiwu, Zhejiang,China
| | - C C Duan
- Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - R B Hu
- The Department of Obstetrics and Gynecology, Yiwu Central Hospital, Yiwu, Zhejiang, China
| | - J Xu
- The Department of Obstetrics and Gynecology, The Fourth Affiliated Hospital, Zhejiang University School of Medicine, Yiwu, Zhejiang, China
| |
Collapse
|
18
|
Yu YY. [Progress of artificial intelligence on pathological research and utilization]. Zhonghua Bing Li Xue Za Zhi 2020; 49:393-396. [PMID: 32392922 DOI: 10.3760/cma.j.cn112151-20190924-00525] [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)
- Y Y Yu
- Department of Surgery, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai Key Laboratory for Gastric Neoplasms, Shanghai 200025, China
| |
Collapse
|
19
|
Yu YY, Zhao J, Li XN. [Knockdown of MTA1 inhibits the proliferation and apoptosis of esophageal cancer cells]. Zhonghua Zhong Liu Za Zhi 2020; 42:197-202. [PMID: 32252197 DOI: 10.3760/cma.j.cn112152-20190611-00370] [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: 11/05/2022]
Abstract
Objective: To investigate the effects of metastasis associated gene 1 (MTA1) expression on the proliferation and apoptosis of human esophageal cancer Eca109 cells. Methods: MTA1 siRNA was transfected into human esophageal cancer Eca109 cells, and the control group and blank group were set up. The expression of MTA1 in Eca109 cells with different treatment was detected by real-time fluorescent quantitative PCR (RT-PCR) and western blot. The proliferation of Eca109 cells was detected by 3-(4, 5-dimethyl-2-thiazolyl)-2, 5-diphenyl-2H tetrazolium bromide (MTT) assay. The cloning formation ability of Eca109 cells was detected by plate cloning assay. The apoptosis of Eca109 cells were detected by flow cytometry. The expression of proliferating cell nuclear antigen (PCNA) and apoptosis-related proteins, including cleaved caspase-3 and total caspase-3 protein in Eca109 cells were detected by western blot. Results: After 48 hours of transfection, RT-PCR result showed that the relative expression levels of MTA1 mRNA in Eca109 cells in the blank group, control group, and siRNA group were 1.00±0.10, 0.98±0.09 and 0.21±0.03, respectively. The expression of MTA1 mRNA in siRNA group was significantly inhibited (P<0.05), while no significant difference of MTA1 mRNA expression between the blank group and the control group has been found (P>0.05). Western blot results were consistent with those of RT-PCR. MTT array results showed that, compared with the blank group and transfection group, the absorbance values of Eca109 cells in siRNA group were dramatically reduced at 48, 72, and 96 h (all P<0.05). There were no significant differences of absorbance values between the blank group and the control group at 48, 72, and 96 h (all P>0.05). The results of the plate colony formation test showed that the number of colony formation in the blank group and control group were 58.64±6.86 and 60.02±7.04, respectively, significantly higher than 18.10±3.16 in siRNA group (P<0.05), while there was no significant difference between the blank group and control group (P>0.05). Flow cytometry results showed that the apoptosis rates in the blank group and control group were (2.13±0.54)% and (2.27±0.61)%, respectively, significantly lower than (32.61±5.28)% in siRNA group (P<0.05), while there was no significant difference between blank group and control group (P>0.05). Western blot results showed that the expression of PCNA protein was down-regulated while cleaved caspase-3 protein expression was upregulated in siRNA group, compared to the control group and blank group (P<0.05). Conclusions: Inhibition of MTA1 expression can inhibit the proliferation of Eca109 cells and induce apoptosis. This process may be related to the down-regulation of PCNA protein expression and activation of caspase-3 protein expression.
Collapse
Affiliation(s)
- Y Y Yu
- Department of Thoracic Surgery, Zhumadian Central Hospital, Zhumadian 463000, China
| | - J Zhao
- Department of Thoracic Surgery, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450000, China
| | - X N Li
- Department of Thoracic Surgery, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450000, China
| |
Collapse
|
20
|
Yu YY, Wei CC. [HUPAN promotes striding across of biomedical research from human genome to human pan-genome]. Zhonghua Bing Li Xue Za Zhi 2020; 49:105-107. [PMID: 32074720 DOI: 10.3760/cma.j.issn.0529-5807.2020.02.001] [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)
- Y Y Yu
- Department of Surgery, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai Key Labortary for Gastric Neoplasms, Shanghai 200025, China
| | - C C Wei
- School of Life Sciences and Biotechnology, Shanghai Jiaotong University, Shanghai 200240, China
| |
Collapse
|
21
|
Song J, Gong SJ, Yu YY. Malpositioning of a venous cannula into the contralateral femoral vein in VA-ECMO. Med Intensiva 2020; 46:S0210-5691(19)30309-2. [PMID: 32001059 DOI: 10.1016/j.medin.2019.12.010] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Revised: 12/03/2019] [Accepted: 12/10/2019] [Indexed: 10/25/2022]
Affiliation(s)
- J Song
- Department of Intensive Care Unit, Zhejiang Hospital, Hangzhou, Zhejiang, China
| | - S J Gong
- Department of Intensive Care Unit, Zhejiang Hospital, Hangzhou, Zhejiang, China.
| | - Y Y Yu
- Department of Intensive Care Unit, Zhejiang Hospital, Hangzhou, Zhejiang, China
| |
Collapse
|
22
|
Abstract
The rapid development of computer technologies brings us great changes in daily life and work. Artificial intelligence is a branch of computer science, which is to allow computers to exercise activities that are normally confined to intelligent life. The broad sense of artificial intelligence includes machine learning and robots. This article mainly focuses on machine learning and related medical fields, and deep learning is an artificial neural network in machine learning. Convolutional neural network (CNN) is a type of deep neural network, that is developed on the basis of deep neural network, further imitating the structure of the visual cortex of the brain and the principle of visual activity. The current machine learning method used in medical big data analysis is mainly CNN. In the next few years, it is the developing trend that artificial intelligence as a conventional tool will enter the relevant departments of medical image interpretation. In addition, this article also shares the progress of the integration of artificial intelligence and biomedicine combined with actual cases, and mainly introduces the current status of CNN application research in pathological diagnosis, imaging diagnosis and endoscopic diagnosis for gastrointestinal diseases.
Collapse
Affiliation(s)
- Y Y Yu
- Institute of Digestive Surgery, Key Laboratory of Gastric Cancer, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200025, China
| |
Collapse
|
23
|
Liu H, Yu H, Peng ZQ, Yu YY, Xie JF, Yang Y. Visual and rapid detection of Plesiomonas shigelloides using loop-mediated isothermal amplification method. Lett Appl Microbiol 2019; 69:411-416. [PMID: 31563155 DOI: 10.1111/lam.13225] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2019] [Revised: 09/17/2019] [Accepted: 09/18/2019] [Indexed: 12/30/2022]
Abstract
Plesiomonas shigelloides is a common pathogen of aquatic animals and can pose a certain hazard to aquaculture. Here, we aimed to develop a loop-mediated isothermal amplification (LAMP) method for the visual detection of P. shigelloides to aid the diagnosis of infections caused by this pathogen in aquatic animals. We used LAMP to amplify P. shigelloides DNA and combined it with calcein or nucleic acid dipstick assay (NADA) to visualize the amplified products. The optimal LAMP amplification temperature was 64°C, and the reaction lasted for 50 min. The limit of detection of recombinant plasmids containing the target gene using the LAMP method was 2·0 × 102 copies per μl, which is ten times higher than that using conventional polymerase chain reaction (PCR). LAMP products could be visualized without agarose gel electrophoresis. We tested 85 fish specimens using the established LAMP method and conventional PCR. The detection rate was 42·4% using the LAMP method and 34·1% using conventional PCR. Based on our results, the LAMP method combined with calcein or NADA is a rapid, specific, sensitive and accurate method for visual detection of fish-derived P. shigelloides and can be used for the laboratory diagnosis of infections caused by it. SIGNIFICANCE AND IMPACT OF THE STUDY: The combination of loop-mediated isothermal amplification (LAMP) and calcein and nucleic acid dipstick assay (NADA) provided a rapid, specific and sensitive method for detecting Plesiomonas shigelloides, which is an important pathogen that causes diseases in aquatic animals worldwide. In the present study, the LAMP method showed a higher detection rate than conventional PCR for P. shigelloides using templates from 85 fish specimens. Thus, the LAMP method could be a reliable and convenient tool for diagnosing diseases in aquatic animals in the laboratory.
Collapse
Affiliation(s)
- H Liu
- Guangdong Key Laboratory of Animal Molecular Design and Precision Breeding, School of Life Science and Engineering, Foshan University, Foshan, Guangdong, China
| | - H Yu
- Guangdong Key Laboratory of Animal Molecular Design and Precision Breeding, School of Life Science and Engineering, Foshan University, Foshan, Guangdong, China
| | - Z Q Peng
- Guangdong Key Laboratory of Animal Molecular Design and Precision Breeding, School of Life Science and Engineering, Foshan University, Foshan, Guangdong, China
| | - Y Y Yu
- Guangdong Key Laboratory of Animal Molecular Design and Precision Breeding, School of Life Science and Engineering, Foshan University, Foshan, Guangdong, China
| | - J F Xie
- Guangdong Key Laboratory of Animal Molecular Design and Precision Breeding, School of Life Science and Engineering, Foshan University, Foshan, Guangdong, China
| | - Y Yang
- Guangdong Key Laboratory of Animal Molecular Design and Precision Breeding, School of Life Science and Engineering, Foshan University, Foshan, Guangdong, China
| |
Collapse
|
24
|
Jin HM, Li D, Yu YY, Zhang M, Liu XN, Li FY, Wu LY, Wang F. [Features of a modified WHO/UCLA AVLT performance in amnestic mild cognitive impairment and mild Alzheimer's disease]. Zhonghua Yi Xue Za Zhi 2019; 99:2423-2428. [PMID: 31434421 DOI: 10.3760/cma.j.issn.0376-2491.2019.31.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To compare the features of a modified WHO/UCLA AVLT performance in the cognitive normal, amnestic mild cognitive impairment (aMCI) and mild Alzheimer's disease (mild AD) patients. Method: A total of 105 cases of cognitivenormal (CN), 48 aMCI and 50 mild AD patients were included between 2016 and 2018. All subjects undertook detailed neuropsychological tests and brain MRI/CT scan. Results: The total score of five learning trials in CN, aMCI and AD groups were 53.9±6.9, 34.6±8.3 and 23.7±6.2, respectively (P<0.001). The score of 20-min delay recallwere 12.5±1.6, 4.3±3.0 and 0.6±1.0, respectively (P<0.001) in three groups. The score of cued recall were 13.0±1.4, 7.0±2.4 and 2.6±2.0, respectively (P<0.001). The score of 20-min delay recall had the largest effect sizes between CN and aMCI groups (Cohen'd=3.8, 95%CI,3.3-4.4), and CN and mild AD groups (Cohen'd=8.1, 95%CI 7.1-9.1). Cued recall had the largest effect size between aMCI and mild AD groups (Cohen'd=2.04, 95%CI 1.5-2.5). The scores of learning total score, 20-min delay recall, cued recall and recognition had the strong relationships with the scores of mini-mental state examination (MMSE) and Montreal cognitive assessment (MoCA) , but obtaining moderate relationships with Boston naming test and trail making test (TMT) and weak relationships with digit span and figure copy. Age and education had no relationship with the main indices of this modified AVLT. Conclusions: The modified WHO/UCLA AVLT is still an age and education fair test to assess memory domain function. Qualitative analysis of AVLT profiles may be useful to differentiate the CN, aMCI and mild AD in Chinese sample.
Collapse
Affiliation(s)
- H M Jin
- Innovation Center for Neurological Disorders, Department of Neurology, Xuanwu Hospital, Capital Medical University, Beijing 100053, China
| | - D Li
- Innovation Center for Neurological Disorders, Department of Neurology, Xuanwu Hospital, Capital Medical University, Beijing 100053, China
| | - Y Y Yu
- Innovation Center for Neurological Disorders, Department of Neurology, Xuanwu Hospital, Capital Medical University, Beijing 100053, China
| | - M Zhang
- Department of Radiology, Xuanwu Hospital, Capital Medical University, Beijing 100053, China
| | - X N Liu
- Department of Radiology, Xuanwu Hospital, Capital Medical University, Beijing 100053, China
| | - F Y Li
- Innovation Center for Neurological Disorders, Department of Neurology, Xuanwu Hospital, Capital Medical University, Beijing 100053, China
| | - L Y Wu
- Innovation Center for Neurological Disorders, Department of Neurology, Xuanwu Hospital, Capital Medical University, Beijing 100053, China
| | - F Wang
- Innovation Center for Neurological Disorders, Department of Neurology, Xuanwu Hospital, Capital Medical University, Beijing 100053, China
| |
Collapse
|
25
|
Wang S, Sun J, Yu YY. [Influence of proximal two-wall bone defect on periodontal ligament stresses under normal occlusal forces]. Zhonghua Kou Qiang Yi Xue Za Zhi 2018; 53:448-452. [PMID: 29996361 DOI: 10.3760/cma.j.issn.1002-0098.2018.07.004] [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 study the influence of two-wall bone defect on periodontal ligament stresses under normal occlusal forces, and to analyze the influence of depth and width of bone defect to periodontal ligament stresses. Methods: Three-dimensional finite element models of teeth, periodontal ligament and alveolar bone were created based on cone beam CT images. Proximal two-wall bone defect with different depths (bone defect occupies one third, two thirds, and full length of root) and widths (bone defect occupies one fourth, two fourths, three fourths and full width of buccal lingual width) were simulated by modifying the elastic modulus of elements within defect areas. Occlusal forces with magnitudes of half of the maximum occlusal forces were applied to the model at an angle of 45° to the long axis of tooth, and equivalent stresses of periodontal ligament were analyzed. Results: In the model of no bone defect, the equivalent stresses of periodontal ligament of incisors, canines, premolars and molars were 2.88, 2.31, 8.67 and 7.53 MPa respectively. The equivalent stresses of periodontal ligament increased with the enlargement of depth and width of bone defect. The equivalent stresses of periodontal ligament with maximum bone defect in both depth and width for incisors, canines, premolars and molars were 4.47, 3.62, 11.66 and 8.72 MPa respectively. In the model of width of bone defect was consistent and bone defect develops vertically, the increments of equivalent stresses of periodontal ligament were significantly greater in the early stage bone defect model (from no defect to one third of root length bone defect) than that in the later stage bone defect model (from two thirds to full length of root length bone defect). In the model of bone defect depth was consistent and bone defect develops transversely, the increments of equivalent stresses of periodontal ligament in the early stage bone defect model (from no defect to one fourth of buccal lingual width bone defect) were significantly smaller than that in the later stage bone defect model (from three fourths to full width of buccal lingual width bone defect). Conclusions: Bone defect with shallow depth and that with large width would increase periodontal ligament stresses. Therefore, more attention should be paid to occlusion evaluation and adjustment for teeth with shallow and wide two-wall bone defect.
Collapse
Affiliation(s)
- S Wang
- Department of Periodontology, Dalian Stomatological Hospital, Dalian Liaoning 116021, China
| | - J Sun
- Department of Periodontology, Dalian Stomatological Hospital, Dalian Liaoning 116021, China
| | - Y Y Yu
- Faculty of Vehicle Engineering and Mechanics, Dalian University of Technology, Dalian Liaoning 116023, China
| |
Collapse
|
26
|
Lei LH, Hu HJ, Yu YY, Xie JZ, Sun WL. [Combined periodontal-orthodontic treatment and nine-year follow-up of a patient with generalized aggressive periodontitis: a case report]. Zhonghua Kou Qiang Yi Xue Za Zhi 2018; 53:116-119. [PMID: 29429231 DOI: 10.3760/cma.j.issn.1002-0098.2018.02.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Affiliation(s)
- L H Lei
- Department of Periodontology, The Second Affiliated Hospital, Zhejiang University, School of Medicine, Hangzhou 310009, China
| | - H J Hu
- Department of Periodontology, The Second Affiliated Hospital, Zhejiang University, School of Medicine, Hangzhou 310009, China
| | - Y Y Yu
- Department of Periodontology, The Second Affiliated Hospital, Zhejiang University, School of Medicine, Hangzhou 310009, China
| | - J Z Xie
- Department of Orthodontics, Hospital of Stomatology of Yinzhou, Ningbo Zhejiang 315100, China
| | - W L Sun
- Department of Periodontology, The Second Affiliated Hospital, Zhejiang University, School of Medicine, Hangzhou 310009, China
| |
Collapse
|
27
|
Yu YY. [Roles of pathologists in era of precision therapy of cancer: comments on the Food and Drug Administration of the United States approval of pembrolizumab for microsatellite instability-high cancer therapy]. Zhonghua Bing Li Xue Za Zhi 2017; 46:668-672. [PMID: 29050066 DOI: 10.3760/cma.j.issn.0529-5807.2017.10.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
|
28
|
Feng Q, Xu M, Yu YY, Hou Y, Mi X, Sun YX, Ma S, Zuo XY, Shao LL, Hou M, Zhang XH, Peng J. High-dose dexamethasone or all-trans-retinoic acid restores the balance of macrophages towards M2 in immune thrombocytopenia. J Thromb Haemost 2017; 15:1845-1858. [PMID: 28682499 DOI: 10.1111/jth.13767] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2017] [Indexed: 01/08/2023]
Abstract
Essentials M1/M2 imbalance is involved in many autoimmune diseases, and could be restored. The expressions and functions of M1 and M2 were investigated in an in vitro culture system. A preferred M1 polarization is involved in the pathogenesis of immune thrombocytopenia (ITP). High-dose dexamethasone or all-trans-retinoic acid restores M1/M2 balance in ITP patients. SUMMARY Background Immune thrombocytopenia (ITP) is an autoimmune disorder. Deficiency of immune tolerance in antigen-presenting cells and cross-communication between antigen-presenting cells and T cells are involved in the pathogenesis of ITP. Macrophages can polarize into proinflammatory M1 or anti-inflammatory M2 phenotypes in response to different environmental stimuli, and have diverse immunologic functions. Objectives To investigate the M1/M2 imbalance in ITP and whether high-dose dexamethasone (HD-DXM) or all-trans-retinoic acid (ATRA) could restore this imbalance. Methods The numbers of M1 and M2 macrophages in the spleens of ITP patients and patients with traumatic spleen rupture were analyzed by immunofluorescence. Monocyte-derived macrophages were cultured and induced with cytokines and drugs. The expression of M1 and M2 markers and functions of M1 and M2 macrophages before and after modulation by HD-DXM or ATRA were evaluated with flow cytometry and ELISA. Results There was preferred M1 polarization in ITP spleens as compared with healthy controls. Monocyte-derived macrophages from ITP patients had increased expression of M1 markers and impaired immunosuppressive functions. Either HD-DXM or ATRA corrected this imbalance by decreasing the expression of M1 markers and increasing the expression of M2 markers. Moreover, HD-DXM-modulated or ATRA-modulated macrophages suppressed both CD4+ and CD8+ T-cell proliferation and expanded CD4+ CD49+ LAG3+ type 1 T-regulatory cells. HD-DXM or ATRA modulated macrophages to shift the T-cell cytokine profile towards Th2. Treating patients with HD-DXM or ATRA revealed that macrophages induced from responders showed a predominant M2-like phenotype and immunosuppressive function. Conclusions Aberrant macrophage polarization is involved in the pathogenesis of ITP. Either HD-DXM or ATRA is able to correct this imbalance.
Collapse
MESH Headings
- Adolescent
- Adult
- Aged
- Biomarkers/metabolism
- CD8-Positive T-Lymphocytes/drug effects
- CD8-Positive T-Lymphocytes/immunology
- CD8-Positive T-Lymphocytes/metabolism
- Case-Control Studies
- Cell Proliferation/drug effects
- Cells, Cultured
- Coculture Techniques
- Cytokines/metabolism
- Dexamethasone/adverse effects
- Dexamethasone/therapeutic use
- Female
- Humans
- Immunologic Factors/adverse effects
- Immunologic Factors/therapeutic use
- Lymphocyte Activation/drug effects
- Macrophage Activation/drug effects
- Macrophages/drug effects
- Macrophages/immunology
- Macrophages/metabolism
- Male
- Middle Aged
- Phagocytosis/drug effects
- Phenotype
- Purpura, Thrombocytopenic, Idiopathic/drug therapy
- Purpura, Thrombocytopenic, Idiopathic/immunology
- Purpura, Thrombocytopenic, Idiopathic/metabolism
- Spleen/drug effects
- Spleen/immunology
- Spleen/metabolism
- T-Lymphocytes, Helper-Inducer/drug effects
- T-Lymphocytes, Helper-Inducer/immunology
- T-Lymphocytes, Helper-Inducer/metabolism
- T-Lymphocytes, Regulatory/drug effects
- T-Lymphocytes, Regulatory/immunology
- T-Lymphocytes, Regulatory/metabolism
- Treatment Outcome
- Tretinoin/adverse effects
- Tretinoin/therapeutic use
- Young Adult
Collapse
Affiliation(s)
- Q Feng
- Department of Hematology, Qilu Hospital, Shandong University, Jinan, China
| | - M Xu
- Department of Hematology, Qilu Hospital, Shandong University, Jinan, China
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Canada
| | - Y Y Yu
- Department of Hematology, Qilu Hospital, Shandong University, Jinan, China
| | - Y Hou
- Department of Hematology, Qilu Hospital, Shandong University, Jinan, China
| | - X Mi
- Department of Hematology, Qilu Hospital, Shandong University, Jinan, China
| | - Y X Sun
- Department of Hematology, Qilu Hospital, Shandong University, Jinan, China
| | - S Ma
- Department of Hematology, Qilu Hospital, Shandong University, Jinan, China
| | - X Y Zuo
- Department of Hematology, Qilu Hospital, Shandong University, Jinan, China
| | - L L Shao
- Department of Hematology, Qilu Hospital, Shandong University, Jinan, China
| | - M Hou
- Department of Hematology, Qilu Hospital, Shandong University, Jinan, China
- Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education and Chinese Ministry of Health, Jinan, China
| | - X H Zhang
- Peking University People's Hospital, Peking University Institute of Hematology, Beijing Key Laboratory of Hematopoietic Stem Cell Transplantation, Beijing, China
| | - J Peng
- Department of Hematology, Qilu Hospital, Shandong University, Jinan, China
| |
Collapse
|
29
|
Zhang MY, Yu YY, Wang SF, Zhang Q, Wu HW, Wei JY, Yang W, Li SY, Yang HJ. Cardiotoxicity evaluation of nine alkaloids from Rhizoma Coptis. Hum Exp Toxicol 2017; 37:185-195. [PMID: 29233041 DOI: 10.1177/0960327117695633] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
PURPOSE Alkaloids derived from Rhizoma Coptis (RC) has been widely applied to clinical treatments in China. However, the toxicity of RC and the alkaloids from RC remained controversial. The research is designed to clarify the cardiotoxic compounds found in RC. METHODS In this study, the real-time cellular analysis cardio system and the high-content analysis were applied to monitor the function of cardiomyocytes (CMs) in the treatment of nine alkaloids in RC. Luciferase-coupled adenosine triphosphate (ATP) assay was used to detect cell viability. RESULTS The results showed that berberine, palmatine, berbamine, and oxyberberine were cardiotoxic, which resulted in arrhythmia and cardiac arrest on CMs in a time- and dose-dependent manner. Meanwhile, berbamine and oxyberberine caused shrinkage and detachment on CMs at 10 μM. Cytotoxicity was induced by these two compounds with decline in cell index and ATP depletion. Cardiotoxicity or cytotoxicity was not observed in the other five alkaloids within 10 μM. CONCLUSION For the first time, the cardiotoxicity of the nine alkaloids was evaluated to clarify the cardiotoxic components in RC. Furthermore, the experimental evidences were provided to support the safety of drug application.
Collapse
Affiliation(s)
- M Y Zhang
- 1 Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, China.,2 Post-Doctoral Research Center, China Academy of Chinese Medical Sciences, Beijing, China
| | - Y Y Yu
- 3 School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, China
| | - S F Wang
- 3 School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, China
| | - Q Zhang
- 3 School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, China
| | - H W Wu
- 1 Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, China
| | - J Y Wei
- 1 Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, China
| | - W Yang
- 4 ACEA Biosciences incorporated, Hangzhou, Zhejiang, China
| | - S Y Li
- 5 Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing, China
| | - H J Yang
- 1 Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, China
| |
Collapse
|
30
|
Liang JH, Cheng Y, Deng X, Yu YY, Li XX. [The efficacy of large spot indirect ophthalmoscopy laser alone or combined with systemic chemotherapy in retinoblastoma therapy]. Zhonghua Yan Ke Za Zhi 2016; 52:745-748. [PMID: 27760646 DOI: 10.3760/cma.j.issn.0412-4081.2016.10.006] [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 evaluate the efficacy of large spot indirect ophthalmoscopy laser alone or combined with systemic chemotherapy in the treatment of early and middle stage retinoblastoma. Methods: Retrospective series case study. Clinical data of 21 patients (22 eyes) who were diagnosed as retinoblastoma (RB) in Peking University People's Hospital from March 2009 to August 2014 were collected. Medical and family history, ocular ultrasound, orbital and cranial MRI or CT examination of RB Children were detailed recorded. Ocular examination and laser treatment were performed under general anesthesia, once every 3-4 weeks until the tumor was under control. The observation period was at least 3 months after the last treatment. The ocular examination included intraocular pressure measurement, anterior segment and fundus examination and the fundus photography with Retcam. Laser therapeutic instrument was large spot indirect ophthalmoscopy laser of 810nm wavelength. Results: Of the 21 children, 16 were male and 5 were female. The range of age was 3 to 82 months averaged 17.3 months. Among 22 eyes, four with small tumor, eight with medium tumor, and ten with large tumor. Two eyes underwent laser treatment only and 20 eyes underwent laser treatment combined with systemic chemotherapy. During the average observation period of 33.9 months, 15 tumors were treated successfully, but 7 failed. The total success rate was 68.2%. The number and success rate of small, medium and large tumor eyes were 4 (100%), 5 (62.5%) and 5 (50%), respectively. There was one case of tumor brain metastases, and the classification of contralateral eye of the child was E phase. COMPLICATIONS Iris burns happened in one eye, obvious vitreous proliferation in one eye and mild vitreous hemorrhage occurred in two eyes, which did not affect the treatment of laser. However, obvious tumor hemorrhage happened in two eyes and affected laser therapy. There was no complicated cataract, iatrogenic retinal hole and tumor intravitreal implant caused by laser blasting effect. Conclusions: Indirect ophthalmoscope laser in 810-nm diode laser with large-spot alone or combined with systemic chemotherapy may be effective treatment for retinoblastoma in earlier than stage C of international classification. It is suitable for large and multiple retinoblastoma.(Chin J Ophthalmol, 2016, 52: 745-748).
Collapse
Affiliation(s)
- J H Liang
- Beijing Key Laboratory of Diagnosis and Therapy of Retinal and Choroid Diseases, Key Laboratory of Vision Loss and Restoration, Ministry of Education, Department of Ophthalmology, People's Hospital, Peking University, Beijing 100044, China
| | | | | | | | | |
Collapse
|
31
|
Li D, Zhao LN, Jin HM, Zhang M, Guo DM, Yu YY, Wu LY, Tang Y, Li FY, Zhou AH, Han Y, Jia JP. [Profiles of cognitive and language impairment of logopenic and non-fluent variant of primary progressive aphasia]. Zhonghua Yi Xue Za Zhi 2016; 96:2356-9. [PMID: 27524196 DOI: 10.3760/cma.j.issn.0376-2491.2016.29.015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
OBJECTIVE To decipher the cognitive and linguistic feature of logopenic variant primary progressive aphasia (lv-PPA) and nonfluent variant primary progressive aphasia (nfv-PPA) and to explore the extent to which cognitive and language impairment contribute to the dysfunction of activity of daily living(ADL). METHODS Seven lv-PPA and five nfv-PPA were enrolled in memory clinic of Xuanwu Hospital, Capital Medical University from January 2015 to January 2016 accordig to the international consensus criteria for PPA and its three subtypes. 20 age-matched normal controls (NC) were included. Both the patients and the NC completed a battery of neuropsychological test, lingusitic test and brain magnetic resonance imaging. All the patients conducted (11)C Pittsburgh compound B (PiB) PET imaging. RESULT Lv-PPA patients were characterized by deficits in lexical retrieval and long sentenses repetition, while nfv-PPA were with motor speech apraxia and phonetic distortion. Compared with nfv-PPA, lv-PPA patient displayed more severe cognitive deficit with younger onset of age (56±5 vs 61±5, P<0.05) , rapid decline of MMSE score within 1.5 years and pariental cortex dysfunctions such as ideomotor praxis, Gerstmann syndrome and contructional apraxia. Correlation analysis indicated that there was more significant association between pariental cortex dysfunction and ADL/mini-mental state examination(MMSE) than that of language deficit(r=-0.868, r=-0.922; r=0.312, r=-0.257). All seven lv-PPA were PiB-PET positive and five nfv-PPA were negative. CONCLUSION This study enriched the chinical and linguistic characterization of lv-PPA and nfv-PPA, which has implication for diagnosis, disease management and treatment for clinicians.
Collapse
Affiliation(s)
- D Li
- Department of Neurology, Xuanwu Hospital, Capital Medical University, Beijing 100053, China
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
32
|
Yu YY, Wang JW, Sun RP. [Application of rapamycin and its derivative everolimus in treatment of tuberous sclerosis complex]. Zhonghua Er Ke Za Zhi 2016; 54:389-391. [PMID: 27143086 DOI: 10.3760/cma.j.issn.0578-1310.2016.05.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
|
33
|
Abstract
BACKGROUND Humans can be frequently exposed to Bisphenol A (BPA) via multiple sources, and babies are considered to be the most sensitive group to exposure of BPA. AIMS To investigate the inhibition potential of BPA towards human liver microsomes (HLMs)-catalyzed zidovudine (AZT) glucuronidation. MATERIALS AND METHODS In vitro HLMs incubation system was used to investigate the inhibition potential of BPA towards AZT glucuronidation. Both Dixon and Lineweaver-Burk plots were employed to determine the inhibition kinetic type, and nonlinear repression was utilized to calculate the inhibition kinetic parameters (Ki). RESULTS Concentration-dependent inhibition of BPA towards AZT glucuronidation was observed. Both Dixon and Lineweaver-Burk plots showed that BPA exerted competitive inhibition towards the glucuronidation of AZT, and nonlinear repression with competitive equation was used to calculate the Ki value to be 3.2 µM. CONCLUSION Potential BPA-AZT interaction might occur when the patients administered with AZT is also exposed to BPA.
Collapse
Affiliation(s)
- Wei-Ping Li
- Gynecologic Surgical department, The General Hospital of Chinese People's Liberation Army, China
| | - Yu-Feng Wang
- In patient department, The General Hospital of Chinese People's Liberation Army, China
| | - Jian Gao
- Gynecologic Surgical department, People's Hospital in Juye, Heze City, Shandong province, China
| | - Ming-Lian Yu
- Department of Pharmacy, The Military General Hospital of Beijing PLA, Beijing, 100700, China
| | - Yan-Yang Yu
- Tangdu Hospital, Fourth Military Medical University, Xi'an 710038, Shaanxi, China
| | - Yuan-Qing Yao
- Gynecologic Surgical department, The General Hospital of Chinese People's Liberation Army, China
| |
Collapse
|
34
|
Lee PH, Yu YY, McDowell I, Leung GM, Lam TH, Stewart SM. Performance of the international physical activity questionnaire (short form) in subgroups of the Hong Kong chinese population. Int J Behav Nutr Phys Act 2011; 8:81. [PMID: 21801461 PMCID: PMC3157408 DOI: 10.1186/1479-5868-8-81] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2011] [Accepted: 08/01/2011] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The International Physical Activity Questionnaire (IPAQ-SF) has been validated and recommended as an efficient method to assess physical activity, but its validity has not been investigated in different population subgroups. We examined variations in IPAQ validity in the Hong Kong Chinese population by six factors: sex, age, job status, educational level, body mass index (BMI), and visceral fat level (VFL). METHODS A total of 1,270 adults (aged 42.9 ± SD 14.4 years, 46.1% male) completed the Chinese version of IPAQ (IPAQ-C) and wore an accelerometer (ActiGraph) for four days afterwards. The IPAQ-C and the ActiGraph were compared in terms of estimated Metabolic Equivalent Task minutes per week (MET-min/wk), minutes spent in activity of moderate or vigorous intensity (MVPA), and agreement in the classification of physical activity. RESULTS The overall Spearman correlation (ρ) of between the IPAQ-C and ActiGraph was low (0.11 ± 0.03; range in subgroups 0.06-0.24) and was the highest among high VFL participants (0.24 ± 0.05). Difference between self-reported and ActiGraph-derived MET-min/wk (overall 2966 ± 140) was the smallest among participants with tertiary education (1804 ± 208). When physical activity was categorized into over or under 150 min/wk, overall agreement between self-report and accelerometer was 81.3% (± 1.1%; subgroup range: 77.2%-91.4%); agreement was the highest among those who were employed full-time in physically demanding jobs (91.4% ± 2.7%). CONCLUSIONS Sex, age, job status, educational level, and obesity were found to influence the criterion validity of IPAQ-C, yet none of the subgroups showed good validity (ρ = 0.06 to 0.24). IPAQ-SF validity is questionable in our Chinese population.
Collapse
Affiliation(s)
- Paul H Lee
- FAMILY: A Jockey Club Initiative for a Harmonious Society, School of Public Health, Li Ka Shing Faculty of Medicine, University of Hong Kong, 21 Sassoon Road, Pokfulam, Hong Kong
| | - YY Yu
- FAMILY: A Jockey Club Initiative for a Harmonious Society, School of Public Health, Li Ka Shing Faculty of Medicine, University of Hong Kong, 21 Sassoon Road, Pokfulam, Hong Kong
| | - Ian McDowell
- Department of Epidemiology and Community Medicine, University of Ottawa, 451 Smyth Road, Ottawa, Canada
| | - Gabriel M Leung
- FAMILY: A Jockey Club Initiative for a Harmonious Society, School of Public Health, Li Ka Shing Faculty of Medicine, University of Hong Kong, 21 Sassoon Road, Pokfulam, Hong Kong
| | - TH Lam
- FAMILY: A Jockey Club Initiative for a Harmonious Society, School of Public Health, Li Ka Shing Faculty of Medicine, University of Hong Kong, 21 Sassoon Road, Pokfulam, Hong Kong
| | - Sunita M Stewart
- Department of Psychiatry, University of Texas Southwestern Medical Center at Dallas, 5323 Harry Hines Boulevard, Dallas, Texas, 75390, USA
| |
Collapse
|
35
|
Zhang LJ, Wang GQ, Yu HL, Wang J, Wang SW, Jia Y, Yu YY, Xu JG. First report of human infection by Rhodoplanes sp., Alphaproteobacteria in China. ASIAN PAC J TROP MED 2011; 4:248-50. [PMID: 21771463 DOI: 10.1016/s1995-7645(11)60079-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2010] [Revised: 12/27/2010] [Accepted: 01/15/2011] [Indexed: 10/18/2022] Open
Abstract
We isolated a novel strain of Alphaproteobacteria from a patient, who had medical history of chronic rhinitis for more than twenty years and recently experienced local skin abscess and ulcer. He eventually died of multiple organ failure due to multi-antibiotics resistance. We identified the microorganism by 16SrRNA sequencing and found that it belonged to the genus Rhodoplanes. It was named as Rhodoplanes sp. strain ZLJ-0. It is resumed that Rhodoplanes sp. strain ZLJ-0 might be an emerging human pathogen involving in unknown febrile conditions and could cause local infection of any tissues or organs. Differential diagnosis of febrile patients should be conducted in clinical practice and research on emerging pathogens of Alphaproteobacteria should be performed to determine the epidemiology, clinical symptoms and pathogenic features of these pathogens.
Collapse
Affiliation(s)
- L J Zhang
- Department of Rickettsiology, National Institute of Communicable Disease Control and Prevention, China CDC, Changping, Beijng, People's Republic of China.
| | | | | | | | | | | | | | | |
Collapse
|
36
|
Yu YY, Niu L, Gao L, Zhang GL, Li J, Deng JP, Qu YZ, Zhao ZW, Gao GD. Ferrous chelator 2,2'-dipyridyl attenuates cerebral vasospasm after experimental subarachnoid haemorrhage in rabbits. J Int Med Res 2010; 38:583-92. [PMID: 20515571 DOI: 10.1177/147323001003800220] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The effect of 2,2'-dipyridyl (DP) on cerebral vasospasm was investigated in a double-injection rabbit model of subarachnoid haemorrhage (SAH). Thirty-six animals were divided between four groups: control (sham-operated), SAH (model alone), SAH + DP (the SAH model in which DP dissolved in dimethyl sulphoxide [DMSO] was injected once daily for 5 days into the cisterna magna), and SAH + DMSO (the SAH model in which DMSO [vehicle] was injected daily for 5 days). There were significant differences in the basilar artery luminal area, wall thickness, neurological deficit score and vasospasm index between the SAH + DP and SAH groups. There was a significant negative correlation between arterial luminal area and arterial wall thickness, and also between the neurological deficit score and vasospasm index. Cells that were positive for terminal deoxynucleotidyl transferase-mediated deoxyuridine triphosphate nick end-labelling (TUNEL) and p53 expression were significantly increased in the SAH + DMSO and SAH groups, but not in the SAH + DP group, versus controls. Thus, DP may attenuate cerebral vasospasm after SAH by suppressing p53-induced apoptosis in the cerebral vessels.
Collapse
Affiliation(s)
- Y Y Yu
- Department of Neurosurgery, Tangdu Hospital, The Fourth Military Medical University, Xi'an, China
| | | | | | | | | | | | | | | | | |
Collapse
|
37
|
Lu HY, Zhuang LW, Yu YY, Si CW. Virological response to antiviral therapy at week 12 indicates a great reduction of intrahepatic hepatitis B virus DNA and cccDNA in HBeAg-positive chronic hepatitis B patients. J Viral Hepat 2010; 17 Suppl 1:59-65. [PMID: 20586935 DOI: 10.1111/j.1365-2893.2010.01272.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Early virological response is considered to be a predictor for the outcome of anti-hepatitis B virus (HBV) therapy. To analyze its correlation to intrahepatic HBV DNA and covalently closed circular DNA (ccc)DNA, 71 hepatitis B virus e antigen (HBeAg)-positive chronic hepatitis B patients were recruited: 34 patients were treated with lamivudine; 13 with interferon-alpha2b; and 24 with sequential therapy of lamivudine-interferon-alpha2b for 48 weeks. Intrahepatic HBV DNA and cccDNA load were measured at the baseline and at Week 48. Fifty-seven patients had virological response at Week 12. Median decreases of serum HBV DNA in patients with or without virological response at Week 12 were 4.0 log(10) (max. 6.2, min. 2.2) and 1.1 log(10) (max. 2.1, min. 0) (Z = -5.766, P = 0.0000), respectively. At Week 48 they were 4.1 log(10) (max. 7.4, min. 1.0) and 2.3 log(10) (max. 7.5, min. 0.3) (Z = -2.760, P = 0.006), respectively. For intrahepatic HBV DNA load they were 1.3 log(10) (max. 4.3, min. -1.2) and 0.6 log(10) (max. 3.5, min. -0.8), respectively, and for HBV cccDNA load they were 1.1 log(10) (max. 4.8, min. -0.5) and 0.5 log(10) (max. 3.0, min. -0.8) (Z = -2.097, P = 0.036), respectively at Week 48. Step-wise logistic regression analysis indicated that the baseline intrahepatic HBV DNA load effected virological response at Week 12 [odds ratio (OR) 0.405; 95% confidence interval (CI) 0.174-0.944; P = 0.036] and HBeAg seroconversion at Week 48 (OR 0.292; 95% CI 0.131-0.649; P = 0.003). In conclusion, virological response at Week 12 indicated a great reduction of intrahepatic DNA and cccDNA load in HBeAg-positive CHB patients. The baseline intrahepatic HBV DNA load affected virological response at Week 12 and HBeAg seroconversion at Week 48.
Collapse
Affiliation(s)
- H Y Lu
- Department of Infectious Disease, Peking University First Hospital, Beijing, China
| | | | | | | |
Collapse
|
38
|
Abstract
In our study, we spun a negative photoresist layer on top of a plasmonic lens which was formed by adopting a metallic ring structure with a nano-scale width opening. We recorded the beam shape of the Bessel-like beam emitting from the plasmonic lens which formed a high aspect ratio structure. We found that the high aspect ratio structure was higher after exposure as the inner and outer diameter had increased. In addition, we used an oblique incidence on the negative resist metallic ring structure to produce an inclined micro-structure. Different exposure results were obtained with the two different metal thicknesses. Therefore, in our study, we not only proved that it is possible to record the shape of a Bessel-like beam, but we also demonstrated that it is possible to create a plasmonic lens which is capable of creating a high aspect ratio structure through exposure.
Collapse
Affiliation(s)
- C K Chang
- Institute of Applied Mechanics, National Taiwan University, Taipei Taiwan
| | | | | | | | | | | | | |
Collapse
|
39
|
Zhang W, Yu YY. Polymorphisms of short tandem repeat of genes and breast cancer susceptibility. Eur J Surg Oncol 2007; 33:529-34. [PMID: 17215102 DOI: 10.1016/j.ejso.2006.11.027] [Citation(s) in RCA: 13] [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] [Received: 07/09/2006] [Accepted: 11/27/2006] [Indexed: 11/19/2022] Open
Abstract
AIM To explore the relationship of short tandem repeat polymorphisms and breast cancer susceptibility. METHODS We searched the MEDLINE database (up to June 2006) with the keywords of tandem repeat sequences, gene polymorphisms, breast cancer, cancer susceptibility and microsatellite instability. We reviewed the literature on gene polymorphisms, especially the relationship of short tandem repeat and breast cancer risk. RESULTS We focused on the candidate genes sex hormones, steroid hormone and receptors, carcinogen metabolism, cell proliferation regulation and other genes. CONCLUSIONS The functional effects of short tandem repeat polymorphisms on cancer susceptibility, especially on breast cancer risk, are identified. The importance of short tandem repeat polymorphisms on development and progression of breast cancer are discussed.
Collapse
Affiliation(s)
- W Zhang
- Department of Surgery, The Ninth People's Hospital of Shanghai, Jiaotong University, School of Medicine, Shanghai 200011, P.R. China
| | | |
Collapse
|
40
|
Yu YY, Pan YS, Zhu ZG. Homeobox genes and their functions on development and neoplasm in gastrointestinal tract. Eur J Surg Oncol 2006; 33:129-32. [PMID: 17045774 DOI: 10.1016/j.ejso.2006.09.010] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2006] [Accepted: 09/06/2006] [Indexed: 01/22/2023] Open
Abstract
AIM To describe the role of homeobox genes on development and tumorigenesis in gastrointestinal tract. METHODS AND RESULTS We searched the MEDLINE database (until March, 2006) with the keywords of homeobox genes, gastrointestinal tract, development, tumorigenesis, carcinogenesis and therapeutic targets. We reviewed the literature on classification of homeobox genes, development of gastrointestinal tract, carcinogenesis of gastrointestinal tract as well as therapeutic targets. CONCLUSIONS The functional effects of homeobox family in development and tumorigenesis of gastrointestinal tract are identified. The importance of homeobox genes and a possibility of therapeutic intervention in clinical medicine are discussed.
Collapse
Affiliation(s)
- Y Y Yu
- Department of Surgery, Shanghai Institute of Digestive Surgery, Ruijin Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai 200025, China.
| | | | | |
Collapse
|
41
|
Chen XY, Yu YY, Ma LN, Huang YL, Shen CL, Zhang WJ, Xu DZ, Si CW. [Effects of antiviral effects of agents and prognosis of chronic hepatitis B.]. Zhonghua Shi Yan He Lin Chuang Bing Du Xue Za Zhi 2006; 20:219-22. [PMID: 17086275] [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: 05/12/2023]
Abstract
BACKGROUND To analyze the effects of difference antiviral agents and the effects of the treatments on long-term prognosis. METHODS Retrospective research method was applied. RESULTS About 40% of the patients were treated with interferon or lamivudine. After the treatment, in lamivudine group, the negative rate of HBV DNA was the highest. In the interferon group, the sero conversion rates of HBeAg/HBeAb were 22.9%. In the antiviral treatment patients, the disease progression and the occurrence of cirrhosis and liver cancer were much lower than those of the control groups. The mortality of cirrhosis and liver cancer in the HBeAg/HBeAb sero converted group was much lower than that of the group without HBeAg/HBeAb sero conversion groups (P less than 0.05). CONCLUSION The antiviral effects of interferon and lamivudine were better than those of the other drug groups. The antiviral drugs could relieve the disease progression and reduce the mortality of cirrhosis and liver cancer.
Collapse
Affiliation(s)
- X Y Chen
- Beijing Youan Hospital, Affiliated to Capital University of Medical Sciences, Beijing 100054, China. Corresponding author: SI Chong-wen, E-mail:
| | | | | | | | | | | | | | | |
Collapse
|
42
|
Yu YY, Li Q, Zhu ZG. NF-κB as a molecular target in adjuvant therapy of gastrointestinal carcinomas. Eur J Surg Oncol 2005; 31:386-92. [PMID: 15837045 DOI: 10.1016/j.ejso.2004.10.010] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2004] [Revised: 10/11/2004] [Accepted: 10/21/2004] [Indexed: 12/13/2022] Open
Abstract
AIM To describe the role of nuclear factor-kappa B (NF-kappaB) in cancer treatment. METHODS We searched the Pubmed database (until Oct, 2004) with the keywords of gastrointestinal carcinoma, NF-kappaB, inhibitor, cancer treatment molecular target and chemoresistance. We reviewed the literature in the role of NF-kappaB activation in chemoresistance, tumour growth suppression and enhancement of apoptosis in gastrointestinal carcinomas. CONCLUSIONS Several possible strategies for inhibiting NF-kappaB activation are identified. The importance of targeting NF-kappaB as a potential therapeutic approach in clinical medicine was discussed.
Collapse
Affiliation(s)
- Y Y Yu
- Shanghai Institute of Digestive Surgery, Ruijin Hospital, Shanghai Second Medical University, Shanghai 200025, China.
| | | | | |
Collapse
|
43
|
Zhu ZG, Yu YY, Zhang Y, Ji J, Zhang J, Liu BY, Chen XH, Lu Y, Jiang HS, Bu L, Hu LD, Kong XY. Germline mutational analysis of CDH1 and pathologic features in familial cancer syndrome with diffuse gastric cancer/breast cancer proband in a Chinese family. Eur J Surg Oncol 2004; 30:531-5. [PMID: 15135482 DOI: 10.1016/j.ejso.2004.03.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/04/2004] [Indexed: 01/29/2023] Open
Abstract
AIMS Hereditary non-polyposis colorectal cancer, thyroid medullary carcinoma, breast/ovarian cancer and gastric cancer/breast cancer syndrome are encountered in surgery. Some gastric cancer/breast cancer syndrome may be the result of a CDH1 germline mutation. This is the first report of CDH1 germline mutations gastric cancer/breast cancer syndrome in Chinese patients. METHODS Peripheral blood from the proband, as well as, her first and second degree relatives was collected and CDH1 gene exon 1-16 mutations were screened. E-cadherin/beta-catenin proteins expression and histopathologic features were examined on gastric cancer/breast cancer tissues from the proband. RESULTS A C-->T nucleotide substitution at exon 13 (mRNA 2200 locus, Accession number NM-004360) was found. This was a transition from GCC-->GCT in DNA sequence (Ala154Ala). Diffuse-type gastric cancer and infiltrating ductal breast carcinoma were present. Both tumours preserved E-cadherin/beta-catenin expression immunohistochemically. CONCLUSIONS Familial cancer syndrome with diffuse-type gastric cancer/breast cancer proband in Chinese has a propensity of early onset during lifespan. No truncating or splice-site CDH1 mutations had been identified in this family. A silent nucleotide variation in exon 13 of the CDH1 gene may contribute to some forms of cancer susceptibility.
Collapse
Affiliation(s)
- Z G Zhu
- Department of Surgery of Ruijin Hospital, Shanghai Institute of Digestive Surgery, Shanghai Second Medical University, Shanghai 200025, China
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
44
|
Cheek BJ, Steel AB, Torres MP, Yu YY, Yang H. Chemiluminescence detection for hybridization assays on the flow-thru chip, a three-dimensional microchannel biochip. Anal Chem 2001; 73:5777-83. [PMID: 11791544 DOI: 10.1021/ac0108616] [Citation(s) in RCA: 127] [Impact Index Per Article: 5.5] [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: 11/28/2022]
Abstract
Chemiluminescence (CL) detection is seldom used in two-dimensional solid support microarray platforms because adequate sensitivity and spatial resolution is difficult to achieve. The three-dimensional ordered microchannels of the Flow-thru Chip increase both the sensitivity and spatial resolution required for quantitative CL measurements on microarrays. Enzyme-catalyzed CL reactions for the detection of hybridizations on microchannel glass were imaged using a CCD camera. Signal uniformity, sensitivity, and dynamic range of the detection method were determined. The relative standard deviation of signal intensities across an array of 64 spots was 8.1%. A detection limit of 250 amol of target with a linear dynamic range of 3 orders of magnitude was obtained for a 3-h assay. Similar to two-color fluorescence measurements, multiple enzyme labels were employed to demonstrate two-channel chemiluminescence. A unique method for measuring the relaxation time of a chemiluminescent species is also described.
Collapse
Affiliation(s)
- B J Cheek
- MetriGenix Inc., Gaithersburg, Maryland 20878, USA
| | | | | | | | | |
Collapse
|
45
|
Harris MR, Lybarger L, Myers NB, Hilbert C, Solheim JC, Hansen TH, Yu YY. Interactions of HLA-B27 with the peptide loading complex as revealed by heavy chain mutations. Int Immunol 2001; 13:1275-82. [PMID: 11581172 DOI: 10.1093/intimm/13.10.1275] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.0] [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: 11/13/2022] Open
Abstract
MHC class I heavy chains assemble in the endoplasmic reticulum with beta(2)-microglobulin and peptide to form heterotrimers. Although full assembly is required for stable class I molecules to be expressed on the cell surface, class I alleles can differ significantly in their rates of, and dependencies on, full assembly. Furthermore, these differences can account for class I allele-specific disparities in antigen presentation to T cells. Recent studies suggest that class I assembly is assisted by an elaborate complex of proteins in the endoplasmic reticulum, collectively referred to as the peptide loading complex. In this report we take a mutagenesis approach to define how HLA-B27 molecules interact with the peptide loading complex. Our results define subtle differences between how B27 mutants interact with tapasin (TPN) and calreticulin (CRT) in comparison to similar mutations in other mouse and human class I molecules. Furthermore, these disparate interactions seen among class I molecules allow us to propose a spatial model by which all class I molecules interact with TPN and CRT, two molecular chaperones implicated in facilitating the binding of high-affinity peptide ligands.
Collapse
Affiliation(s)
- M R Harris
- Department of Genetics, Washington University School of Medicine, St Louis, MO 63110, USA
| | | | | | | | | | | | | |
Collapse
|
46
|
Lybarger L, Yu YY, Chun T, Wang CR, Grandea AG, Van Kaer L, Hansen TH. Tapasin enhances peptide-induced expression of H2-M3 molecules, but is not required for the retention of open conformers. J Immunol 2001; 167:2097-105. [PMID: 11489993 DOI: 10.4049/jimmunol.167.4.2097] [Citation(s) in RCA: 37] [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] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
H2-M3 is a class Ib MHC molecule that binds a highly restricted pool of peptides, resulting in its intracellular retention under normal conditions. However, addition of exogenous M3 ligands induces its escape from the endoplasmic reticulum (ER) and, ultimately, its expression at the cell surface. These features of M3 make it a powerful and novel model system to study the potentially interrelated functions of the ER-resident class I chaperone tapasin. The functions ascribed to tapasin include: 1) ER retention of peptide-empty class I molecules, 2) TAP stabilization resulting in increased peptide transport, 3) direct facilitation of peptide binding by class I, and 4) peptide editing. We report in this study that M3 is associated with the peptide-loading complex and that incubation of live cells with M3 ligands dramatically decreased this association. Furthermore, high levels of open conformers of M3 were efficiently retained intracellularly in tapasin-deficient cells, and addition of exogenous M3 ligands resulted in substantial surface induction that was enhanced by coexpression of either membrane-bound or soluble tapasin. Thus, in the case of M3, tapasin directly facilitates intracellular peptide binding, but is not required for intracellular retention of open conformers. As an alternative approach to define unique aspects of M3 biosynthesis, M3 was expressed in human cell lines that lack an M3 ortholog, but support expression of murine class Ia molecules. Unexpectedly, peptide-induced surface expression of M3 was observed in only one of two cell lines. These results demonstrate that M3 expression is dependent on a unique factor compared with class Ia molecules.
Collapse
MESH Headings
- ATP Binding Cassette Transporter, Subfamily B, Member 2
- ATP Binding Cassette Transporter, Subfamily B, Member 3
- ATP-Binding Cassette Transporters/metabolism
- Adjuvants, Immunologic/deficiency
- Adjuvants, Immunologic/genetics
- Adjuvants, Immunologic/metabolism
- Adjuvants, Immunologic/physiology
- Animals
- Antiporters/deficiency
- Antiporters/genetics
- Antiporters/metabolism
- Antiporters/physiology
- Cell Line, Transformed
- Epitopes/chemistry
- Epitopes/genetics
- Epitopes/metabolism
- H-2 Antigens/metabolism
- HeLa Cells
- Histocompatibility Antigen H-2D
- Histocompatibility Antigens Class I/biosynthesis
- Histocompatibility Antigens Class I/chemistry
- Histocompatibility Antigens Class I/genetics
- Histocompatibility Antigens Class I/metabolism
- Humans
- Immunoglobulins/deficiency
- Immunoglobulins/genetics
- Immunoglobulins/metabolism
- Immunoglobulins/physiology
- L Cells
- Membrane Transport Proteins
- Mice
- Mutagenesis, Site-Directed
- Peptides/metabolism
- Peptides/pharmacology
- Protein Binding/genetics
- Protein Binding/immunology
- Protein Conformation
- Transfection
Collapse
Affiliation(s)
- L Lybarger
- Department of Genetics, Washington University School of Medicine, St. Louis, MO 63110, USA
| | | | | | | | | | | | | |
Collapse
|
47
|
Benoit V, Steel A, Torres M, Yu YY, Yang H, Cooper J. Evaluation of three-dimensional microchannel glass biochips for multiplexed nucleic acid fluorescence hybridization assays. Anal Chem 2001; 73:2412-20. [PMID: 11403280 DOI: 10.1021/ac000946r] [Citation(s) in RCA: 75] [Impact Index Per Article: 3.3] [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: 11/30/2022]
Abstract
Three-dimensional, flow-through microchannel glass substrates have a potential for enhanced performance, including increased sensitivity and dynamic range, over traditional planar substrates used in medium-density microarray platforms. This paper presents a methodology for the implementation of multiplexed nucleic acid hybridization fluorescence assays on microchannel glass substrates. Fluorescence detection was achieved, in a first instance, using conventional low-magnification microscope objective lenses, as imaging optics whose depth-of-field characteristics match the thickness of the microchannel glass chip. The optical properties of microchannel glass were shown, through experimental results and simulations, to be compatible with the quantitative detection of heterogeneous hybridization events taking place along the microchannel sidewalls, with detection limits for oligonucleotide targets in the low-attomole range.
Collapse
Affiliation(s)
- V Benoit
- Department of Electronics and Electrical Engineering, University of Glasgow, Scotland, UK
| | | | | | | | | | | |
Collapse
|
48
|
Harris MR, Lybarger L, Yu YY, Myers NB, Hansen TH. Association of ERp57 with Mouse MHC Class I Molecules Is Tapasin Dependent and Mimics That of Calreticulin and not Calnexin. J Immunol 2001; 166:6686-92. [PMID: 11359824 DOI: 10.4049/jimmunol.166.11.6686] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Before peptide binding in the endoplasmic reticulum, the class I heavy (H) chain-beta(2)-microglobulin complexes are detected in association with TAP and two chaperones, TPN and CRT. Recent studies have shown that the thiol-dependent reductase, ERp57, is also present in this peptide-loading complex. However, it remains controversial whether the association of ERp57 with MHC class I molecules precedes their combined association with the peptide-loading complex or whether ERp57 only associates with class I molecules in the presence of TPN. Resolution of this controversy could help determine the role of ERp57 in class I folding and/or assembly. To define the mouse class I H chain structures involved in interaction with ERp57, we tested chaperone association of L(d) mutations at residues 134 and 227/229 (previously implicated in TAP association), residues 86/88 (which ablate an N-linked glycan), and residue 101 (which disrupts a disulfide bond). The association of ERp57 with each of these mutant H chains showed a complete concordance with CRT, TAP, and TPN but not with calnexin. Furthermore, ERp57 failed to associate with H chain in TPN-deficient.220 cells. These combined data demonstrate that, during the assembly of the peptide-loading complex, the association of ERp57 with mouse class I is TPN dependent and parallels that of CRT and not calnexin.
Collapse
Affiliation(s)
- M R Harris
- Department of Newborn Medicine, Children's Hospital, St. Louis, MO 63110, USA
| | | | | | | | | |
Collapse
|
49
|
Wang ZC, Yu YY, Shu XW. [Investigation of relationship between concentrated platelets and basic platelets in donors]. Hunan Yi Ke Da Xue Xue Bao 2001; 26:77-8. [PMID: 12536626] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
Abstract
OBJECTIVE To investigate the relationship between the concentrated platelets and basic platelets of donors. METHODS We observed the harvest rate of concentrated platelets of different basic platelets in donors from Changsha area and non-Changsha area. RESULTS The number of concentrated platelets in Group B was higher than that in Group A (P < 0.01). The harvest rates were 65.4% and 67.5% respectively in donors from Changsha area and non-Changsha area. CONCLUSION There is positiver relationship between the harvest rate of concentrated platelets and basic platelets, and the transportation of blood does not effect the harvest rate of platelets.
Collapse
Affiliation(s)
- Z C Wang
- Department of Blood Transfution, Xiangya Hospital, Central South University, Changsha 410008
| | | | | |
Collapse
|
50
|
Myers NB, Harris MR, Connolly JM, Lybarger L, Yu YY, Hansen TH. Kb, Kd, and Ld molecules share common tapasin dependencies as determined using a novel epitope tag. J Immunol 2000; 165:5656-63. [PMID: 11067922 DOI: 10.4049/jimmunol.165.10.5656] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The endoplasmic reticulum protein tapasin is considered to be a class I-dedicated chaperone because it facilitates peptide loading by proposed mechanisms such as peptide editing, endoplasmic reticulum retention of nonpeptide-bound molecules, and/or localizing class I near the peptide source. Nonetheless, the primary functions of tapasin remain controversial as do the relative dependencies of different class I molecules on tapasin for optimal peptide loading and surface expression. Tapasin dependencies have been addressed in previous studies by transfecting different class I alleles into tapasin-deficient LCL721.220 cells and then monitoring surface expression and Ag presentation to T cells. Indeed, by these criteria, class I alleles have disparate tapasin-dependencies. In this study, we report a novel and more direct method of comparing tapasin dependency by monitoring the ratio of folded vs open forms of the different mouse class I heavy chains, L(d), K(d), and K(b). Furthermore, we determine the amount of de novo heavy chain synthesis required to attain comparable expression in the presence vs absence of tapasin. Our findings show that tapasin dramatically improves peptide loading of all three of these mouse molecules.
Collapse
Affiliation(s)
- N B Myers
- Department of Genetics, Washington University School of Medicine, St. Louis, MO 63110, USA
| | | | | | | | | | | |
Collapse
|