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Yao XY, Li ZH, Zhang Y, Zheng ZY, Zhou Y. [Analysis of differences in health awareness among urban and rural elderly population under the background of aging]. Zhonghua Yu Fang Yi Xue Za Zhi 2023; 57:1418-1425. [PMID: 37743303 DOI: 10.3760/cma.j.cn112150-20220923-00916] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 09/26/2023]
Abstract
Objective: To explore the status quo, differences and influencing factors of health concern among the elderly in urban and rural areas. Methods: The data of China Health and Retirement Tracking Survey (CHARLS) in 2018 were used to describe the health concerns of the elderly in urban and rural areas by selecting relevant indicators. The differences of health concerns of the elderly in urban and rural areas were compared from two aspects of social demographic characteristics and health status. Multivariate logistic regression model was used to analyze the factors affecting the health concern of the elderly in urban and rural areas. Results: A total of 7 758 urban and rural elderly were included, including 1 913 urban elderly and 5 845 rural elderly. Half (3 899, 50.3%) of the elderly are at the average level of health concern, and there is a difference between urban and rural elderly (χ2=186.61,P<0.05). The rural and urban elderly with different characteristics had different health concerns. The rural elderly with more than two diseases had higher health concerns (χ2=13.71, P=0.001), and different living types of urban elderly people have different health concerns (χ2=28.96, P<0.001). Regression analysis showed that the health concern of the elderly in urban and rural areas was affected by many factors, gender (OR=1.51, P<0.001), health status (OR=2.18, P<0.001), cognitive function impairment (OR=2.93, P<0.001), depression (OR=0.49, P<0.001) is the main factor affecting the difference of health attention of the elderly in urban and rural areas. Whether to receive pension was the influential factor of health concern of the rural elderly (OR=0.63, P<0.05); Disability was an influential factor in the health concern of the urban elderly (OR=2.11, P<0.05). Conclusion: There is much room to improve the health attention of the elderly in urban and rural areas. It is suggested to increase the economic security of the elderly in rural areas and pay special attention to the disabled elderly in urban areas, so as to further improve the health status of the elderly groups.
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Affiliation(s)
- X Y Yao
- School of Nursing, Peking Union Medical College, Beijing 100144, China
| | - Z H Li
- School of Nursing, Peking Union Medical College, Beijing 100144, China
| | - Y Zhang
- School of Nursing, Peking Union Medical College, Beijing 100144, China
| | - Z Y Zheng
- School of Nursing, Peking Union Medical College, Beijing 100144, China
| | - Y Zhou
- School of Nursing, Peking Union Medical College, Beijing 100144, China
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2
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Zhao C, Yao XY, Zhang L, Lyu J, Xu SQ, Fei J, Shi XM. [Research on the formulation and revision of standard limits for antimony,boron and vanadium in the "Standards for Drinking Water Quality (GB5749-2022)" in China]. Zhonghua Yu Fang Yi Xue Za Zhi 2023; 57:831-834. [PMID: 37357199 DOI: 10.3760/cma.j.cn112150-20221024-01028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Subscribe] [Scholar Register] [Indexed: 06/27/2023]
Abstract
China is rich in antimony, boron, and vanadium mineral resources, which have been detected in environmental water bodies and drinking water. During the revision process of the "Standards for Drinking Water Quality (GB5749-2006)", research and evaluation are focused on three indicators: antimony, boron and vanadium. Vanadium is added and the limit value of boron is adjusted. This study reviews and discusses the technical contents related to the revision of the antimony, boron and vanadium, including the environmental presence levels, exposure status, health effects, and the revision of the standard limits of these three indicators. Suggestions are also made for the implementation of this standard.
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Affiliation(s)
- C Zhao
- China CDC Key Laboratory of Environment and Population Health/National Institute of Environmental Health/Chinese Center for Disease Control and Prevention, Beijing 100021, China
| | - X Y Yao
- China CDC Key Laboratory of Environment and Population Health/National Institute of Environmental Health/Chinese Center for Disease Control and Prevention, Beijing 100021, China
| | - L Zhang
- China CDC Key Laboratory of Environment and Population Health/National Institute of Environmental Health/Chinese Center for Disease Control and Prevention, Beijing 100021, China
| | - J Lyu
- China CDC Key Laboratory of Environment and Population Health/National Institute of Environmental Health/Chinese Center for Disease Control and Prevention, Beijing 100021, China
| | - S Q Xu
- Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430074, China
| | - J Fei
- Department of Environmental Health & Endemic Disease Control & Prevention, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing 210000, China
| | - X M Shi
- China CDC Key Laboratory of Environment and Population Health/National Institute of Environmental Health/Chinese Center for Disease Control and Prevention, Beijing 100021, China
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3
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Zhang L, Yao XY, Ye BX, Han JY, Gao SH. [Methodological study on the establishment of limit values in the Standards of Drinking Water Quality]. Zhonghua Yu Fang Yi Xue Za Zhi 2023; 57:839-843. [PMID: 37357201 DOI: 10.3760/cma.j.cn112150-20221109-01084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Subscribe] [Scholar Register] [Indexed: 06/27/2023]
Abstract
The establishment of limit values for standards of drinking water quality is an important and complex process. This study systematically introduced the methodology of the establishment of standard limit values for drinking water quality and elaborated on the workflow of setting limit values of water quality indicators, principles and methods of selecting water quality indicators, derivation of safety reference values, and establishment of limit values. It also aimed to provide reference and support for the future revision of relevant standards.
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Affiliation(s)
- L Zhang
- China CDC Key Laboratory of Environment and Population Health/National Institute of Environmental Health, Chinese Center for Disease Control and Prevention,Beijing 100021, China
| | - X Y Yao
- China CDC Key Laboratory of Environment and Population Health/National Institute of Environmental Health, Chinese Center for Disease Control and Prevention,Beijing 100021, China
| | - B X Ye
- China CDC Key Laboratory of Environment and Population Health/National Institute of Environmental Health, Chinese Center for Disease Control and Prevention,Beijing 100021, China
| | - J Y Han
- China CDC Key Laboratory of Environment and Population Health/National Institute of Environmental Health, Chinese Center for Disease Control and Prevention,Beijing 100021, China
| | - S H Gao
- China CDC Key Laboratory of Environment and Population Health/National Institute of Environmental Health, Chinese Center for Disease Control and Prevention,Beijing 100021, China
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4
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Yao XY, Gao MC, Bai SW, Xie L, Song YY, Ding J, Wu YF, Xue CR, Hao Y, Zhang Y, Guan YT. Enlarged perivascular spaces, neuroinflammation and neurological dysfunction in NMOSD patients. Front Immunol 2022; 13:966781. [PMID: 36248814 PMCID: PMC9557144 DOI: 10.3389/fimmu.2022.966781] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2022] [Accepted: 08/31/2022] [Indexed: 11/22/2022] Open
Abstract
Background and objectives Cerebrospinal fluid (CSF) and interstitial fluid exchange along a brain-wide network of perivascular spaces (PVS) termed the ‘glymphatic system’. The aquaporin-4 (AQP4) water channels abundantly expressed on astrocytic endfeet play a key role in the CSF circulation in the glymphatic system. Neuromyelitis optica spectrum disorder (NMOSD) is an inflammatory demyelinating autoimmune disease of the central nervous system (CNS) featured with a specific autoantibody directed against AQP4 in most of patients. Anti-AQP4 antibodies are likely resulting in the impairment of the brain glymphatic system and the enlargement of PVS in NMOSD patients. In the current study, we aimed to demonstrate the features of EPVS detected by MRI and its association with the CSF anti-AQP4 antibody titer, CNS inflammatory markers, and disease severity in NMOSD patients. Methods We conducted a retrospective review of a consecutive cohort of 110 patients with NMOSD who had brain MRI. We assessed the correlation of EPVS with markers of neuroinflammation, blood-brain barrier (BBB) function and severity of neurological dysfunction in patients. We used multivariate logistic regression analysis to determine the independent variables associated with disease severity. Results The median number of total-EPVS was 15.5 (IQR, 11-24.2) in NMOSD patients. The number of total-EPVS was significantly related to EDSS score after correcting for the effects of age and hypertension (r=0.353, p<0.001). The number of total-EPVS was also significantly associated with the titer of CSF anti-AQP4 antibody, the albumin rate (CSF/serum ratios of albumin), the CSF albumin, IgG and IgA levels. Logistic regression analysis showed that total-EPVS and serum albumin level were two independent factors to predict disease severity in NMOSD patients (OR=1.053, p=0.028; OR=0.858, p=0.009 respectively). Furthermore, ROC analysis achieved AUC of 0.736 (0.640-0.831, p<0.001) for total-EPVS to determine severe NMOSD (EDSS 4.5-9.5). Discussion In our cohort, we found a relationship between EPVS and neuroinflammation and BBB function in NMOSD. Moreover, EPVS might independently predict neurological dysfunction in patients with NMOSD.
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Affiliation(s)
- Xiao-Ying Yao
- Department of Neurology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Mei-Chun Gao
- Department of Neurology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Shu-Wei Bai
- Department of Neurology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Li Xie
- Clinical Research Center, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Ya-Ying Song
- Department of Neurology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Jie Ding
- Department of Neurology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Yi-Fan Wu
- Department of Neurology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Chun-Ran Xue
- Department of Neurology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Yong Hao
- Department of Neurology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Ying Zhang
- Department of Neurology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Yang-Tai Guan
- Department of Neurology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
- *Correspondence: Yang-Tai Guan,
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5
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Yao XY, Xie L, Cai Y, Zhang Y, Deng Y, Gao MC, Wang YS, Xu HM, Ding J, Wu YF, Zhao N, Wang Z, Song YY, Wang LP, Xie C, Li ZZ, Wan WB, Lin Y, Jin HF, Wang K, Qiu HY, Zhuang L, Zhou Y, Jin YY, Ni LP, Yan JL, Guo Q, Xue JH, Qian BY, Guan YT. Human Umbilical Cord Mesenchymal Stem Cells to Treat Neuromyelitis Optica Spectrum Disorder (hUC-MSC-NMOSD): A Study Protocol for a Prospective, Multicenter, Randomized, Placebo-Controlled Clinical Trial. Front Neurol 2022; 13:860083. [PMID: 35547390 PMCID: PMC9082633 DOI: 10.3389/fneur.2022.860083] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2022] [Accepted: 03/21/2022] [Indexed: 11/13/2022] Open
Abstract
Background Neuromyelitis Optica spectrum disorder (NMOSD) is severe relapsing and disabling autoimmune disease of the central nervous system. Its optimal first-line treatment to reduce relapse rate and ameliorate neurological disability remains unclear. We will conduct a prospective, multicenter, randomized, placebo-controlled clinical trial to study the safety and effectiveness of human umbilical cord mesenchymal stem cells (hUC-MSCs) in treating NMOSD. Methods The trial is planned to recruit 430 AQP4-IgG seropositive NMOSD patients. It consists of three consecutive stages. The first stage will be carried out in the leading center only and aims to evaluate the safety of hUC-MSCs. Patients will be treated with three different doses of hUC-MSCs: 1, 2, or 5 × 106 MSC/kg·weight for the low-, medium-, and high-dose group, respectively. The second and third stages will be carried out in six centers. The second stage aims to find the optimal dosage. Patients will be 1:1:1:1 randomized into the low-, medium-, high-dose group and the controlled group. The third stage aims to evaluate the effectiveness. Patients will be 1:1 randomized into the optimal dose and the controlled group. The primary endpoint is the first recurrent time and secondary endpoints are the recurrent times, EDSS scores, MRI lesion numbers, OSIS scores, Hauser walking index, and SF-36 scores. Endpoint events and side effects will be evaluated every 3 months for 2 years. Discussion Although hUC-MSC has shown promising treatment effects of NMOSD in preclinical studies, there is still a lack of well-designed clinical trials to evaluate the safety and effectiveness of hUC-MSC among NMOSD patients. As far as we know, this trial will be the first one to systematically demonstrate the clinical safety and efficacy of hUC-MSC in treating NMOSD and might be able to determine the optimal dose of hUC-MSC for NMOSD patients. Trial registration The study was registered with the Chinese Clinical Trial Registry (CHICTR.org.cn) on 2 March 2016 (registration No. ChiCTR-INR-16008037), and the revised trial protocol (Protocol version 1.2.1) was released on 16 March 2020.
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Affiliation(s)
- Xiao-Ying Yao
- Department of Neurology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Li Xie
- Clinical Research Center, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Yu Cai
- Department of Neurology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Ying Zhang
- Department of Neurology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Ye Deng
- Department of Neurology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Mei-Chun Gao
- Department of Neurology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Yi-Shu Wang
- Department of Neurology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Hui-Ming Xu
- State Key Laboratory of Oncogenes and Related Genes, Renji-Med-X Clinical Stem Cell Research Center, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Jie Ding
- Department of Neurology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Yi-Fan Wu
- Department of Neurology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Nan Zhao
- Department of Neurology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Ze Wang
- Department of Neurology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Ya-Ying Song
- Department of Neurology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Li-Ping Wang
- Department of Neurology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Chong Xie
- Department of Neurology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Ze-Zhi Li
- Department of Neurology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Wen-Bin Wan
- Department of Neurology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Yan Lin
- Department of Neurology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Hai-Feng Jin
- Department of Neurology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Kan Wang
- Department of Neurology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Hui-Ying Qiu
- Department of Neurology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Lei Zhuang
- Department of Neurology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Yan Zhou
- Department of Neurology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Yu-Yan Jin
- Department of Neurology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Li-Ping Ni
- Department of Neurology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Jia-Li Yan
- Department of Neurology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Quan Guo
- Department of Neurology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Jia-Hui Xue
- Department of Neurology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Bi-Yun Qian
- Clinical Research Center, School of Medicine, Shanghai Jiao Tong University, Shanghai, China.,Shanghai Clinical Research Promotion and Development Center, Shanghai Hospital Development Center, Shanghai, China
| | - Yang-Tai Guan
- Department of Neurology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
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Yang Y, Zeng XY, Liu ZK, Li ZX, Zhao HY, Liu ZX, Li P, Yao XY, He BJ, Li KL, Li Y, Sun F, Zhan S. [Artificial intelligence-based literature data warehouse for vaccine safety]. Zhonghua Liu Xing Bing Xue Za Zhi 2022; 43:431-435. [PMID: 35345302 DOI: 10.3760/cma.j.cn112338-20210407-00288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Objective: To establish a sustainable updated literature data warehouse for global vaccine safety assessment, and provide data support for evidence-based vaccine safety assessment. Methods: Semi-automated construction and updating of a literature data warehouse were achieved through the continuous integration of standard operating steps of evidence-based reviews with artificial intelligence technologies. Following the standard procedure of a systematic literature review, the literatures about vaccine safety assessment published before November 29, 2020 were retrieved from 9 databases including OVID, Scopus, Web of Science, Cochrane Library, and ClinicalTrails.org in English and Wanfang, CNKI, VIP, and SinoMed in Chinese. Literatures were screened for two rounds in a semi-automatic manner (by artificial intelligence literature processing system and manual work) according to the inclusion/exclusion criteria. Furthermore, the literatures were classified according to the types of vaccines and adverse events. The updating strategy was established, and the literature data warehouse was updated regularly. Experts were organized to select specific vaccine safety topics and carry out special demonstration studies. Results: More than 0.41 million articles were retrieved. According to the inclusion/exclusion criteria, 23 304 articles were included after two rounds of screening. At present, we have selected and completed three prior topics as demonstration studies, including the systematic review of "DPT (diphtheria, pertussis and tetanus) vaccine and encephalopathy/encephalitis", and the classified management of literatures about allergic purpura and brachial plexus neuritis. Conclusions: The sustainable updated literature data warehouse of vaccine safety can provide high-quality research data for vaccine safety research, including evidence support for immunization related policy-making and adjustment and vaccine safety-related methodological research or clinical tool development; and further demonstration studies can provide references for building a new methodological framework system for timely and efficient completion of the evidence-based assessment of vaccine safety.
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Affiliation(s)
- Y Yang
- National Institute of Health Data Science, Peking University, Beijing 100191, China
| | - X Y Zeng
- School of Public Health, Peking University, Beijing 100191, China
| | - Z K Liu
- School of Public Health, Peking University, Beijing 100191, China
| | - Z X Li
- Department of Education, Peking University Health Science Center, Beijing 100191, China
| | - H Y Zhao
- School of Public Health, Peking University, Beijing 100191, China
| | - Z X Liu
- School of Public Health, Peking University, Beijing 100191, China
| | - P Li
- School of Public Health, Peking University, Beijing 100191, China
| | - X Y Yao
- School of Public Health, Peking University, Beijing 100191, China
| | - B J He
- School of Public Health, Peking University, Beijing 100191, China
| | - K L Li
- National Immunization Program, Chinese Center for Disease Control and Prevention, Beijing 100050, China
| | - Y Li
- National Immunization Program, Chinese Center for Disease Control and Prevention, Beijing 100050, China
| | - F Sun
- School of Public Health, Peking University, Beijing 100191, China
| | - Siyan Zhan
- School of Public Health, Peking University, Beijing 100191, China Research Center of Clinical Epidemiololgy, Peking University Third Hospital, Beijing 100191, China
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Cun DJ, Wang Q, Yao XY, Ma B, Zhang Y, Li LH. [Potential suitable habitats of Haemaphysalis longicornis in China under different climatic patterns]. Zhongguo Xue Xi Chong Bing Fang Zhi Za Zhi 2021; 33:359-364. [PMID: 34505442 DOI: 10.16250/j.32.1374.2021023] [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
OBJECTIVE To evaluate the impact of environmental and climatic factors on the distribution of suitable habitats of Haemaphysalis longicornis, and to predict the potential distribution of H. longicornis under different climate patterns in China. METHODS Data pertaining to the distribution of H. longicornis were retrieved from public literatures. The effects of 19 climatic factors (annual mean temperature, annual mean temperature difference between day and night, isothermality, standard deviation of seasonal variation of temperature, maximum temperature of the warmest month, minimum temperature of the coldest month, temperature annual range, mean temperature of the wettest season, mean temperature of the driest season, mean temperature of the warmest season, mean temperature of the coldest season, annual mean precipitation, precipitation of the wettest month, precipitation of the driest month, coefficient of variance of precipitation, precipitation of the wettest season, precipitation of the driest season, precipitation of the warmest season and precipitation of the coldest season) and 4 environmental factors (elevation, slope, slope aspect and vegetation coverage) on the potential distribution of H. longicornis were assessed using the maximum entropy (MaxEnt) model based on the H. longicornis distribution data and climatic and environmental data, and the potential distribution of H. longicornis was predicted under the RCP 2.6 and 8.5 emissions scenarios. RESULTS Among the environmental and climatic factors affecting the geographical distribution of H. longicornis in China, the factors contributing more than 10% to the distribution of H. longicornis mainly included the precipitation of the driest month (26.0%), annual mean temperature (11.2%), annual mean precipitation (10.0%) and elevation (24.2%). Under the current climate pattern, the high-, medium- and low-suitable habitats of H. longicornis are 1 231 900, 1 696 200 km2 and 1 854 400 km2 in China, respectively. The distribution of H. longicornis increased by 336 100 km2 and 367 300 km2 in 2050 and 2070 under the RCP 2.6 emissions scenario, and increased by 381 000 km2 and 358 000 km2 in 2050 and 2070 under the RCP 8.5 emissions scenario in China, respectively. CONCLUSIONS Climatic and environmental factors, such as precipitation, temperature and elevation, greatly affect the distribution of H. longicornis in China, and the suitable habitats of H. longicornis may expand in China under different climate patterns in future.
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Affiliation(s)
- D J Cun
- School of Public Health and Management, Weifang Medical University, Weifang 261053, China
- Co-first authors
| | - Q Wang
- School of Public Health and Management, Weifang Medical University, Weifang 261053, China
- Co-first authors
| | - X Y Yao
- School of Public Health and Management, Weifang Medical University, Weifang 261053, China
| | - B Ma
- School of Public Health and Management, Weifang Medical University, Weifang 261053, China
| | - Y Zhang
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, China
| | - L H Li
- School of Public Health and Management, Weifang Medical University, Weifang 261053, China
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8
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Yao XY, Tian N, Ma B, Zhang Y, Cun DJ, Li LH. [Effects of climate changes on the distribution of Rhipicephalus microplus in China]. Zhongguo Xue Xi Chong Bing Fang Zhi Za Zhi 2021; 33:267-273. [PMID: 34286528 DOI: 10.16250/j.32.1374.2020298] [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: 11/27/2022]
Abstract
OBJECTIVE To identify the environmental factors affecting the geographical distribution of Rhipicephalus microplus in China, and to examine the impact of climate changes on the distribution of R. microplus in China. METHODS The national and international publications pertaining to the geographical distribution of R. microplus in China were retrieved, and the geographical location was extracted. The suitable habitats of R. microplus and the dominant environmental factors affecting the distribution of suitable habitats of R. microplus were predicted in China based on the geographical data and environmental variables using the ArcGIS 10.7 software and the maximum entropy model. RESULTS Among the main climatic factors affecting the geographical distribution of R. microplus in China, the factors contributing more than 10% to the suitable habitats of R. microplus mainly include the annual mean precipitation (38.2%), the average temperature of the coldest quarter (28.4%) and the precipitation of the driest month (14.2%). The current suitable habitats of R. microplus were mainly found in southern China, and the high-, medium- and low-suitable areas accounted for 8.6%, 13.1% and 10.5% of the total land area of China, respectively. The suitable habitats of R. microplus were predicted to increase by 399 800 km2 in China using the maximum entropy model under the RCP 4.5 emissions scenario in 2070, and the emerging suitable habitats were mainly distributed in Gansu Province, Ningxia Hui Autonomous Region, Qinghai Province, Hebei Province, Shaanxi Province, Liaoning Province, Inner Mongolia Autonomous Region, Shandong Province, Sichuan Province and Tibeten Autonomous Region. In addition, the suitable habitats of R. microplus were predicted to show an overall expansion towards northward from present to 2070. CONCLUSIONS Climate changes affect the distribution of suitable habitats of R. microplus in China, and annual mean precipitation may be a key factor affecting the distribution of suitable habitats of R. microplus.
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Affiliation(s)
- X Y Yao
- School of Public Health, Weifang Medical University, Weifang 261053, China.,Co-first authors
| | - N Tian
- School of Public Health, Weifang Medical University, Weifang 261053, China.,Co-first authors
| | - B Ma
- School of Public Health, Weifang Medical University, Weifang 261053, China
| | - Y Zhang
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, China
| | - D J Cun
- School of Public Health, Weifang Medical University, Weifang 261053, China
| | - L H Li
- School of Public Health, Weifang Medical University, Weifang 261053, China
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9
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Sun B, Cheng YB, Yao XY, Zhao KF, Zhou ZR, Shi XM. [Current situation, problems and suggestions of environmental health standardization]. Zhonghua Yu Fang Yi Xue Za Zhi 2021; 55:424-427. [PMID: 33730839 DOI: 10.3760/cma.j.cn112150-20200507-00693] [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: 06/12/2023]
Abstract
In this paper, the history and current situation of environmental health standardization in China are reviewed, and the experience and shortcomings in the process of environmental health standardization in China are analyzed, suggestions for the next step of environmental health standards are also put forward.
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Affiliation(s)
- B Sun
- National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, Beijing 100021, China
| | - Y B Cheng
- National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, Beijing 100021, China
| | - X Y Yao
- National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, Beijing 100021, China
| | - K F Zhao
- National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, Beijing 100021, China
| | - Z R Zhou
- National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, Beijing 100021, China
| | - X M Shi
- National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, Beijing 100021, China
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10
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Yao XY, Che JH. Effects of copper-containing intrauterine devices on the endometrium. Reprod Dev Med 2021. [DOI: 10.4103/2096-2924.309791] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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11
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Dong R, Yang R, Zhan Y, Lai HD, Ye CJ, Yao XY, Luo WQ, Cheng XM, Miao JJ, Wang JF, Liu BH, Liu XQ, Xie LL, Li Y, Zhang M, Chen L, Song WC, Qian W, Gao WQ, Tang YH, Shen CY, Jiang W, Chen G, Yao W, Dong KR, Xiao XM, Zheng S, Li K, Wang J. Single-Cell Characterization of Malignant Phenotypes and Developmental Trajectories of Adrenal Neuroblastoma. Cancer Cell 2020; 38:716-733.e6. [PMID: 32946775 DOI: 10.1016/j.ccell.2020.08.014] [Citation(s) in RCA: 111] [Impact Index Per Article: 27.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Revised: 07/08/2020] [Accepted: 08/20/2020] [Indexed: 02/06/2023]
Abstract
Neuroblastoma (NB), which is a subtype of neural-crest-derived malignancy, is the most common extracranial solid tumor occurring in childhood. Despite extensive research, the underlying developmental origin of NB remains unclear. Using single-cell RNA sequencing, we generate transcriptomes of adrenal NB from 160,910 cells of 16 patients and transcriptomes of putative developmental cells of origin of NB from 12,103 cells of early human embryos and fetal adrenal glands at relatively late development stages. We find that most adrenal NB tumor cells transcriptionally mirror noradrenergic chromaffin cells. Malignant states also recapitulate the proliferation/differentiation status of chromaffin cells in the process of normal development. Our findings provide insight into developmental trajectories and cellular states underlying human initiation and progression of NB.
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Affiliation(s)
- Rui Dong
- Department of Pediatric Surgery, Children's Hospital of Fudan University, and Shanghai Key Laboratory of Birth Defects, Shanghai 201102, China.
| | - Ran Yang
- Department of Pediatric Surgery, Children's Hospital of Fudan University, and Shanghai Key Laboratory of Birth Defects, Shanghai 201102, China
| | - Yong Zhan
- Department of Pediatric Surgery, Children's Hospital of Fudan University, and Shanghai Key Laboratory of Birth Defects, Shanghai 201102, China
| | - Hua-Dong Lai
- School of Biomedical Engineering & Med-X Research Institute, Shanghai Jiao Tong University, Shanghai 200030, China
| | - Chun-Jing Ye
- Department of Pediatric Surgery, Children's Hospital of Fudan University, and Shanghai Key Laboratory of Birth Defects, Shanghai 201102, China
| | - Xiao-Ying Yao
- Family Planning Department, Obstetrics and Gynecology Hospital of Fudan University, Shanghai 200011, China
| | - Wen-Qin Luo
- State Key Laboratory of Oncogenes and Related Genes, Renji-Med X Clinical Stem Cell Research Center, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, China
| | - Xiao-Mu Cheng
- School of Biomedical Engineering & Med-X Research Institute, Shanghai Jiao Tong University, Shanghai 200030, China
| | - Ju-Ju Miao
- School of Biomedical Engineering & Med-X Research Institute, Shanghai Jiao Tong University, Shanghai 200030, China
| | - Jun-Feng Wang
- Department of Pediatric Surgery, Children's Hospital of Fudan University, and Shanghai Key Laboratory of Birth Defects, Shanghai 201102, China
| | - Bai-Hui Liu
- Department of Pediatric Surgery, Children's Hospital of Fudan University, and Shanghai Key Laboratory of Birth Defects, Shanghai 201102, China
| | - Xiang-Qi Liu
- Department of Pediatric Surgery, Children's Hospital of Fudan University, and Shanghai Key Laboratory of Birth Defects, Shanghai 201102, China
| | - Lu-Lu Xie
- Department of Pediatric Surgery, Children's Hospital of Fudan University, and Shanghai Key Laboratory of Birth Defects, Shanghai 201102, China
| | - Yi Li
- Department of Pediatric Surgery, Children's Hospital of Fudan University, and Shanghai Key Laboratory of Birth Defects, Shanghai 201102, China
| | - Man Zhang
- School of Biomedical Engineering & Med-X Research Institute, Shanghai Jiao Tong University, Shanghai 200030, China
| | - Lian Chen
- Department of Pathology, Children's Hospital of Fudan University, Shanghai 201102, China
| | - Wei-Chen Song
- Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai 200030, China
| | - Wei Qian
- School of Biomedical Engineering & Med-X Research Institute, Shanghai Jiao Tong University, Shanghai 200030, China
| | - Wei-Qiang Gao
- School of Biomedical Engineering & Med-X Research Institute, Shanghai Jiao Tong University, Shanghai 200030, China; State Key Laboratory of Oncogenes and Related Genes, Renji-Med X Clinical Stem Cell Research Center, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, China
| | - Yun-Hui Tang
- Family Planning Department, Obstetrics and Gynecology Hospital of Fudan University, Shanghai 200011, China
| | - Chun-Yan Shen
- Family Planning Department, Obstetrics and Gynecology Hospital of Fudan University, Shanghai 200011, China
| | - Wei Jiang
- Genergy Bio-technology (Shanghai) Co., Ltd, Shanghai 200235, China
| | - Gong Chen
- Department of Pediatric Surgery, Children's Hospital of Fudan University, and Shanghai Key Laboratory of Birth Defects, Shanghai 201102, China
| | - Wei Yao
- Department of Pediatric Surgery, Children's Hospital of Fudan University, and Shanghai Key Laboratory of Birth Defects, Shanghai 201102, China
| | - Kui-Ran Dong
- Department of Pediatric Surgery, Children's Hospital of Fudan University, and Shanghai Key Laboratory of Birth Defects, Shanghai 201102, China
| | - Xian-Min Xiao
- Department of Pediatric Surgery, Children's Hospital of Fudan University, and Shanghai Key Laboratory of Birth Defects, Shanghai 201102, China
| | - Shan Zheng
- Department of Pediatric Surgery, Children's Hospital of Fudan University, and Shanghai Key Laboratory of Birth Defects, Shanghai 201102, China
| | - Kai Li
- Department of Pediatric Surgery, Children's Hospital of Fudan University, and Shanghai Key Laboratory of Birth Defects, Shanghai 201102, China.
| | - Jia Wang
- State Key Laboratory of Oncogenes and Related Genes, Renji-Med X Clinical Stem Cell Research Center, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, China.
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Yao XY, Wu YF, Gao MC, Hong RH, Ding J, Hao Y, Zhang Y, Guan YT. Serum albumin level is associated with the severity of neurological dysfunction of NMOSD patients. Mult Scler Relat Disord 2020; 43:102130. [PMID: 32417662 DOI: 10.1016/j.msard.2020.102130] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2020] [Revised: 04/06/2020] [Accepted: 04/12/2020] [Indexed: 11/30/2022]
Abstract
BACKGROUND Neuromyelitis optica spectrum disorder (NMOSD) is an inflammatory autoimmune disease of the central nervous system. Serum albumin (SA) has antioxidant, immunomodulatory and anti-inflammatory effects. However, the roles of SA in NMOSD have not been studied. The current study aimed to clarify the association of SA with disease severity and prognosis in NMOSD patients. METHODS Serum levels of albumin were measured by Bromcresol Green method. Serum level measurements of interleukins were performed using enzyme-linked immunoassay (ELISA) method. RESULTS Of all the 130 NMOSD patients, 96 patients were in the acute phase while 34 patients were in the remission phase of disease at the time of sampling. SA concentration was significantly correlated with EDSS score in patients in the acute phase but not in remission phase (r = - 0.388, p < 0.001 and r = - 0.467, p = 0.809, respectively). Logistic analysis revealed that SA was the only significant factor to predict severe NMOSD (EDSS 8.0-9.5) OR = 0.698, 95%CI 0.563-0.865, p = 0.001) after adjustment of other confounding factors. Furthermore, SA was negatively correlated with the serum level of IL-33 (r = -0.438, p = 0.016) in the acute phase of NMOSD patients. CONCLUSION The current study found that low level of SA was an independent indicator of more severe neurological deficit in patients in acute phase of NMOSD. SA concentration was negatively correlated with the serum level of IL-33 in the acute phase of the disease, which implies that SA might participate in the immunopathology of NMOSD partly through its interaction with IL-33.
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Affiliation(s)
- Xiao-Ying Yao
- Department of Neurology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, China
| | - Yi-Fan Wu
- Department of Neurology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, China
| | - Mei-Chun Gao
- Department of Neurology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, China
| | - Rong-Hua Hong
- Department of Neurology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, China
| | - Jie Ding
- Department of Neurology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, China
| | - Yong Hao
- Department of Neurology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, China
| | - Ying Zhang
- Department of Neurology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, China.
| | - Yang-Tai Guan
- Department of Neurology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, China.
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Sun B, Cheng YB, Wang XL, Zhang W, Yao XY, Shi XM. [Suggestions on environmental and health work from Health Environment Promotion Campaigns]. Zhonghua Yu Fang Yi Xue Za Zhi 2019; 53:1193-1197. [PMID: 31795573 DOI: 10.3760/cma.j.issn.0253-9624.2019.12.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The Health Environment Promotion Campaigns (HEPCs) focus on the major environmental health issues and relevant factors of concern among the general public, and promote the achievement of the national health goal. Based on the summary and analysis of the background, key indicators, specific actions in different domains of the HEPCs, this paper proposes suggestions for scientifically implementing HEPCs from five aspects, namely, formulating implementation plans, establishing pilot areas, building comprehensive service platforms, improving the health literacy of residents and strengthening the development of protection technologies and standards.
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Affiliation(s)
- B Sun
- National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, Beijing 100021, China
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Zhu J, Yao XY, Tang YH, Sun YH. Analysis of clinicopathologic classification features of hydatidiform mole misdiagnosed as missed abortion preoperatively. Reprod Dev Med 2019. [DOI: 10.4103/2096-2924.262393] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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15
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Tang YH, Yao XY. Safety of Mifepristone in Medical Abortion in Hyperthyroidism Pregnant Mice. Reproductive and Developmental Medicine 2019. [DOI: 10.4103/2096-2924.255990] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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16
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Zhang Y, Yao XY, Gao MC, Ding J, Hong RH, Huang H, Zhuang L, Wang YG, Hao Y, Guan YT. Th2 axis-related cytokines in patients with neuromyelitis optica spectrum disorders. CNS Neurosci Ther 2017; 24:64-69. [PMID: 29110391 DOI: 10.1111/cns.12774] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [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: 06/04/2017] [Revised: 10/15/2017] [Accepted: 10/16/2017] [Indexed: 02/06/2023] Open
Abstract
AIMS Neuromyelitis optica spectrum disorder (NMOSD) is an inflammatory autoimmune disease of the central nervous system. Increasing evidence indicates that NMOSD is a Th2- and Th17-dominant disease. IL-25, IL-31, and IL-33 are three newly found Th2-related cytokines, and their roles in the pathogenesis of NMOSD have not been studied. This study aimed to measure the serum levels of IL-25, IL-31, and IL-33 in patients with NMOSD and evaluate their clinical implications. METHODS Serum was collected from patients with NMOSD (n = 48) and healthy controls (HC, n = 28). Serum level measurements of IL-25, IL-31, IL-33, IL-17A, and IL-6 were performed using enzyme-linked immunoassay (ELISA) method. RESULTS The serum levels of IL-25, IL-31, and IL-33 were significantly higher in patients with NMOSD as compared to HC. The serum level of IL-31 was significantly correlated with IL-17A (r = 0.382,P = 0.009) in patients with NMOSD; the latter is a critical cytokine in the pathogenesis of NMOSD. The serum level of IL-33 was higher in patients with characteristic brain lesions than patients without (307 pg/mL vs 166 pg/mL, P = 0.028). Furthermore, the serum level of IL-33 in the acute phase of the disease was positively correlated with annualized relapse rate (r = 0.364, P = 0.04). CONCLUSION We found higher serum levels of IL-25, IL-31, and IL-33 in patient with NMOSD as compared to healthy controls. The serum level of IL-33 during acute phase was associated with more past attacks in patients with NMOSD.
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Affiliation(s)
- Ying Zhang
- Department of Neurology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Xiao-Ying Yao
- Department of Neurology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Mei-Chun Gao
- Department of Neurology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Jie Ding
- Department of Neurology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Rong-Hua Hong
- Department of Neurology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Hua Huang
- Department of Neurology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Lei Zhuang
- Department of Neurology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Yong-Gang Wang
- Department of Neurology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Yong Hao
- Department of Neurology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Yang-Tai Guan
- Department of Neurology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
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18
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Yao XY, Tang YH. A Case of Pregnancy Combined with Congenital Osteogenesis Imperfecta. Reprod Dev Med 2017. [DOI: 10.4103/2096-2924.224211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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19
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Zhang L, Chang KK, Li MQ, Li DJ, Yao XY. Mouse endometrial stromal cells and progesterone inhibit the activation and regulate the differentiation and antibody secretion of mouse B cells. Int J Clin Exp Pathol 2013; 7:123-133. [PMID: 24427332 PMCID: PMC3885466] [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] [Received: 10/20/2013] [Accepted: 11/18/2013] [Indexed: 06/03/2023]
Abstract
The regulation mechanism for the B cells in the female reproductive tract (FRT) is unclear now. The aim of this study was to analysis the effect of progesterone and mouse endometrium stromal cells (ESCs) on B cells and explore it roles in modulating B cells-mediated immune responses. We primary isolated mouse ESCs from endometrium of BALB/c mice and B cells from spleen cells of BALB/c mice, and then constructed these two kind of cells co-culture system, and treated with or without progesterone. We found that both treatment with progesterone and co-culture with ESCs reduced the expression of co-stimulatory molecules CD80 and CD86 on mouse B cells from spleen cells. In addition, the expression of CD138 (syndecan-1) on B cells was increased after co-culture with ESCs, however, progesterone could partly reduce this effect. Unlike progesterone, ESCs alone promoted the proliferation and stimulated the secretion level of antibodies IgG and IgA of B cells. Our current results progesterone and ESCs could inhibit the activation of B cells through deceasing CD80 and CD86 expression, regulated the differentiation status of B cells by up-regulating the expression of CD138 together, and might further inhibit the antigen presentation function of B cells, which is beneficial to the establishment of fertilization and pregnancy. In addition, ESCs also promoted the proliferation and antibody secretion, which might participate in the resisting infections during non pregnancy and pregnancy.
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Affiliation(s)
- Li Zhang
- Laboratory for Reproductive Immunology, Hospital and Institute of Obstetrics and Gynecology, Fudan University Shanghai Medical College, Shanghai Key Laboratory of Female Reproductive Endocrine Related Diseases Shanghai 200011, China
| | - Kai-Kai Chang
- Laboratory for Reproductive Immunology, Hospital and Institute of Obstetrics and Gynecology, Fudan University Shanghai Medical College, Shanghai Key Laboratory of Female Reproductive Endocrine Related Diseases Shanghai 200011, China
| | - Ming-Qing Li
- Laboratory for Reproductive Immunology, Hospital and Institute of Obstetrics and Gynecology, Fudan University Shanghai Medical College, Shanghai Key Laboratory of Female Reproductive Endocrine Related Diseases Shanghai 200011, China
| | - Da-Jin Li
- Laboratory for Reproductive Immunology, Hospital and Institute of Obstetrics and Gynecology, Fudan University Shanghai Medical College, Shanghai Key Laboratory of Female Reproductive Endocrine Related Diseases Shanghai 200011, China
| | - Xiao-Ying Yao
- Laboratory for Reproductive Immunology, Hospital and Institute of Obstetrics and Gynecology, Fudan University Shanghai Medical College, Shanghai Key Laboratory of Female Reproductive Endocrine Related Diseases Shanghai 200011, China
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Li HP, He XJ, Tang CL, Yao XY, Li DJ. Fusion of hC3d3 to hCGβ enhances responsiveness in vitro of human peripheral immunocompetent cells upon the antigen primary challenge. J Reprod Immunol 2008; 78:115-24. [DOI: 10.1016/j.jri.2008.03.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2007] [Revised: 01/17/2008] [Accepted: 03/07/2008] [Indexed: 10/22/2022]
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Yao XY, Yuan MM, Li DJ. Molecular adjuvant C3d3 improved the anti-hCGbeta humoral immune response in vaginal inoculation with live recombinant Lactobacillus expressing hCGbeta-C3d3 fusion protein. Vaccine 2007; 25:6129-39. [PMID: 17629363 DOI: 10.1016/j.vaccine.2007.04.090] [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: 11/27/2006] [Revised: 04/02/2007] [Accepted: 04/28/2007] [Indexed: 11/25/2022]
Abstract
To enhance the contraceptive efficiency of human chorionic gonadotrophin (hCG)-beta contraceptive vaccine, we coupled hCG-beta gene with molecular adjuvant C3d3, and cloned into live Lactobacilli (Lb.) to express fusion protein hCGbeta-C3d3. The recombinant Lb. could survive in BALB/c murine vagina for at least 3 weeks. After inoculating BALB/c and C57BL/6 mice via vagina, we found that the antibody titer peaks induced by the Lb.hCGbeta-C3d3 inoculation were higher significantly than the Lb.hCGbeta. T and B cells in spleen and vagina were significantly increased, and anti-hCGbeta IgG and IgA antibody-secreting cells in uterus and vagina were significantly increased compared to the control in different strain mice. Our study shows that the C3d3 can display apparent adjuvant efficiency to induce more powerful humoral response to the hCGbeta antigen in vaginal mucosal immunization.
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Affiliation(s)
- Xiao-Ying Yao
- Laboratory for Reproductive Immunology, Hospital and Institute of Obstetrics & Gynecology, Fudan University Shanghai Medical College, Shanghai 200011, China
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Yao XY, Yuan MM, Li DJ. Mucosal inoculation of Lactobacillus expressing hCGβ induces an anti-hCGβ antibody response in mice of different strains. Methods 2006; 38:124-32. [PMID: 16414267 DOI: 10.1016/j.ymeth.2005.09.014] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2005] [Accepted: 09/29/2005] [Indexed: 11/29/2022] Open
Abstract
To show that an anti-human chorionic gonadotrophin-beta (hCGbeta) antibody response can be induced by inoculating Lb. expressing hCGbeta through different mucosal pathways in mice of two strains, female BALB/c and C57BL/6 mice were immunized via vaginal, oral or nasal routes with 10(8), 10(9), and 10(10)Lb.hCGbeta (a recombinant Lactobacillus expressing hCGbeta). The mice were immunized twice with a booster in study week 3. An indirect ELISA was used to determine anti-hCGbeta IgG and IgA antibodies in vaginal lavage and serum, obtained from the 2nd to 8th week after the primary immunization. Flow cytometry was used to analyze the lymphocyte proliferation from these tissues, 1 week after the primary immunization. The hCGbeta antigen-specific antibody-secreting cells of spleen, uterus, and vagina were evaluated by enzyme-linked immunospot assay (ELISpot), 2 weeks after the booster. The analysis showed that 10(9) and 10(10)Lb.hCGbeta inoculations induced similar anti-hCGbeta antibody responses, while the three mucosal pathways induced similar antibody responses. The antiserum obtained after boosters with 10(9) and 10(10)Lb. hCGbeta was able to neutralize more than 100 ng/ml hCG antigen, both in BALB/c and C57BL/6 mice. The highest antibody titer induced by vaginal mucosal immunization was stronger than that obtained via the other mucosal pathways. The B cells in the vagina appeared to proliferate after vaginal immunization (P<0.05). The numbers of anti-hCGbeta IgG and IgA antibody-secreting cells in the uterus and vagina were greater than in the spleen. Therefore, the vaginal mucosal route appears to be a better immunization pathway to induce higher anti-hCGbeta antibody levels in the reproductive tract.
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MESH Headings
- Administration, Intranasal
- Administration, Intravaginal
- Administration, Oral
- Animals
- Antibody Formation/immunology
- Antibody-Producing Cells/cytology
- B-Lymphocytes/cytology
- B-Lymphocytes/immunology
- Cell Count
- Chorionic Gonadotropin, beta Subunit, Human/administration & dosage
- Chorionic Gonadotropin, beta Subunit, Human/genetics
- Chorionic Gonadotropin, beta Subunit, Human/immunology
- Contraception, Immunologic/methods
- Enzyme-Linked Immunosorbent Assay
- Female
- Humans
- Immunity, Mucosal/immunology
- Immunoglobulin A/blood
- Immunoglobulin A/immunology
- Immunoglobulin G/blood
- Immunoglobulin G/immunology
- Lactobacillus/genetics
- Lymphocyte Activation/immunology
- Mice
- Mice, Inbred BALB C
- Mice, Inbred C57BL
- Neutralization Tests
- Recombinant Proteins/administration & dosage
- Recombinant Proteins/immunology
- Spleen/cytology
- Spleen/immunology
- T-Lymphocytes/cytology
- T-Lymphocytes/immunology
- Uterus/cytology
- Uterus/immunology
- Vaccination/methods
- Vaccines, Contraceptive/immunology
- Vagina/cytology
- Vagina/immunology
- Vagina/microbiology
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Affiliation(s)
- Xiao-Ying Yao
- Laboratory for Reproductive Immunology, Hospital and Institute of Obstetrics and Gynecology, Shanghai Medical College, Fudan University, Shanghai 200011, China
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Wang XL, Zhao XR, Yu M, Yuan MM, Yao XY, Li DJ. Gene conjugation of molecular adjuvant C3d3 to hCGβ increased the anti-hCGβ Th2 and humoral immune response in DNA immunization. J Gene Med 2006; 8:498-505. [PMID: 16389614 DOI: 10.1002/jgm.871] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Human chorionic gonadotropin (hCG) has been used as an anti-fertility vaccine and as a target for cancer immunotherapy. We have explored the use of three copies of C3d in DNA vaccine as molecular adjuvant to improve the immunogenicity of this hormone in previous work and found that the immune response induced by pcDNA3-hCGbeta-C3d3 has been enhanced 243-fold compared with pcDNA3-hCGbeta following DNA immunization in BALB/c mice. In the present study, a new functionally active DNA vaccine of hCGbeta-C3d3 chimera based on pCMV4 vector has been described. We compared the expression efficiency of pCMV4 and pcDNA3 eukaryotic vectors for hCGbeta and hCGbeta-C3d3 fusion protein and the immune response of mice immunized with pcDNA3-hCGbeta, pCMV4-hCGbeta, pcDNA3-hCGbeta-C3d3 and pCMV4-hCGbeta-C3d3, respectively, at 25, 50 and 100 pmol dose, and further analyzed the levels of Th1 and Th2 cytokines produced by spleen lymphocytes of the immunized mice upon hCG restimulation in vitro. It was found that pCMV4 vector achieved 1.3-1.5-fold higher protein expression and raised 1.1-1.2 (primary) and 1.2-1.3 (booster) logs higher titer of anti-hCGbeta IgG than pcDNA3. Mice vaccinated with 50 pmol of hCGbeta-C3d3-DNAs elicited the highest titer of hCGbeta-specific antibody among the serial doses and the immune response induced by pCMV4-hCGbeta-C3d3 were, respectively, 1.3, 1.3 and 1.2 logs higher than that of pcDNA3-hCGbeta-C3d3 and 2.2, 2.9 and 2.4 logs higher than that of pCMV4-hCGbeta at week 2 following the booster immunization. Moreover, we observed that the production of IL-4 and IL-10 increased in mice vaccinated with hCGbeta-C3d3-DNAs and the ratio of IL-4/IFN-(gamma) showed a Th2 bias of immune response in the mice immunized with hCGbeta-C3d3-DNAs. These findings indicated that gene fusion of C3d3 to hCGbeta, as a means of harnessing the adjuvant potential of the innate immune system, may improve the antigen-specific Th2 humoral immune response of the hCGbeta DNA vaccine and the pCMV4 vector is a more ideal eukaryotic vector for DNA vaccine than pcDNA3.
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Affiliation(s)
- Xiu-Li Wang
- Laboratory for Reproductive Immunology, Hospital and Institute of Obstetrics & Gynecology, Shanghai Medical College, Fudan University, Shanghai 200011, China
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Wang XL, Li DJ, Yuan MM, Yu M, Yao XY. Enhancement of humoral immunity to the hCG beta protein antigen by fusing a molecular adjuvant C3d3. J Reprod Immunol 2005; 63:97-110. [PMID: 15380941 DOI: 10.1016/j.jri.2004.04.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Revised: 04/13/2004] [Accepted: 04/14/2004] [Indexed: 11/30/2022]
Abstract
The vaccine directed against human chorionic gonadotropin (hCG) has previously undergone clinical test demonstrating the feasibility of the approach in preventing pregnancy in women. Some individuals, however, did not response adequately despite employing highly immunogenic bacterial toxoids as carriers. In this study, we investigated the potential of three copies of C3d as a new molecular adjuvant to enhance the immunogenicity of hCG beta protein antigen. The antibody response to the hCG beta-C3d3 fusion protein immunization was compared with those resulting from immunization with the hCG beta alone and the hCG beta plus CFA/IFA either in BALB/c mice or in C(57)BL/6J mice. Our results showed that the fusion of C3d3 to hCG beta protein antigen resulted in a significant elevation of the serum anti-hCG beta antibody level in the two mouse strains and the antibodies were capable of effectively neutralizing the bioactivity of hCG. The immunization with C3d3 as a molecular adjuvant favored Th2 bias of immune response. The immunity-enhancing effect of the C3d3 was 10-fold (initial) and 20-32-fold (booster) greater than CFA/IFA. These findings indicated that fusion of C3d3 to hCG beta, as a means of harnessing the adjuvant potential of the innate immune system, may improve immunogenicity of the hCG beta contraceptive vaccine, which is useful to produce a cost-effective vaccine and for the less-responsive population.
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Affiliation(s)
- Xiu-Li Wang
- Laboratory for Reproductive Immunology, Institute of Obstetrics and Gynecology, Fudan University, Shanghai 200011, China.
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Yao XY, Wang HM, Li DJ, Yuan MM, Wang XL, Yu M, Wang MY, Zhu Y, Meng Y. Inoculation of Lactobacillus expressing hCG beta in the vagina induces an anti-hCG beta antibody response in murine vaginal mucosa. J Reprod Immunol 2005; 63:111-22. [PMID: 15380942 DOI: 10.1016/j.jri.2004.06.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2004] [Revised: 06/18/2004] [Accepted: 06/21/2004] [Indexed: 10/26/2022]
Abstract
OBJECTIVES To test the possibility of vaccination with lactobacillus expressing hCG beta antigen administered by vaginal mucosal immunization. METHODS A plasmid pIlac-hCG beta was constructed and then transfected into Lactobacillus casei CECT5276, which stably expressed hCG beta protein. RIA was used to detect hCG beta in the culture supernatant and cell lysate. Western blotting was performed to evaluate the expressed protein of interest. Female BALB/c mice aged 6-8 weeks received inoculations in the vagina of the recombinant L. casei CECT5276. ELISA was used to determine the anti-hCG beta IgA antibody in vaginal lavage fluid from the BALB/c mice after vaginal mucosal immunization. RESULTS The pIlac alone appeared to have a higher efficiency than pIlac-hCG beta, and the highest transfection efficiency of both plasmids was at pulse voltages of 1200 V and 1500 V. About 78.5% of the hCG beta protein was excreted into the culture supernatant. Excretion of hCG beta was most efficient when the pH of the culture medium was adjusted to around 7.0 and the concentration of lactose was around 1%. The hCG beta protein in the vaginal lavage fluid of these BALB/c mice was positive on the third day after vaginal inoculation. Anti-hCG beta IgA antibody continued to be found in the vaginal lavage fluid for 2 weeks following a booster vaginal inoculation. The splenic lymphocytes of the mice immunized with hCG beta through the vagina underwent a proliferative reaction to hCG antigen restimulation in vitro. Interferon gamma (IFN-gamma) and interleukin (IL)-4 were secreted at higher levels after vaginal mucosal immunization of L. casei expressing hCG beta than after vaginal mucosal immunization of L. casei alone. CONCLUSIONS Vaginal immunization of lactobacillus expressing hCG beta induced an anti-hCG beta antibody response in the murine vaginal mucosa. Induction of the antigen-specific antibodies in the reproductive tract following vaginal inoculation of recombinant lactobacillus will lead to the development of a safe, efficient, and easy-to-use form of immunocontraception.
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Affiliation(s)
- Xiao-Ying Yao
- Laboratory for Reproductive Immunology, Institute of Obstetrics & Gynecology, Fudan University, 419# Fangxie Road, Shanghai 200011, PR China
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Jiang JL, Chan HC, Zhou Q, Yu MK, Yao XY, Lam SY, Zhu H, Ho LS, Leung KM, Chen ZN. HAb18G/CD147-mediated calcium mobilization and hepatoma metastasis require both C-terminal and N-terminal domains. Cell Mol Life Sci 2004; 61:2083-91. [PMID: 15316657 DOI: 10.1007/s00018-004-4146-4] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
HAb18G/CD147 is a heavily glycosylated protein containing two immunoglobulin superfamily domains. Our previous studies have indicated that overexpression of HAb18G/CD147 enhances metastatic potentials in human hepatoma cells by disrupting the regulation of store-operated Ca2+ entry by nitric oxide (NO)/cGMP. In the present study, we investigated the structure-function of HAb18G/CD147 by transfecting truncated HAb18G/CD147 fragments into human 7721 hepatoma cells. The inhibitory effect of HAb18G/CD147 on 8-bromo-cGMP-regulated thapsigargin-induced Ca2+ entry was reversed by the expression of either C or N terminus truncated HAb18G/CD147 in T7721deltaC and T7721deltaN cells, respectively. The potential effect of HAb18G/CD147 on metastatic potentials, both adhesion and invasion capacities, of hepatoma cells was abolished in T7721deltaC cells, but not affected in T7721deltaN cells. Release and activation of matrix metalloproteinases (MMPs), MMP-2 and MMP-9, were found to be enhanced by the expression of HAb18G/CD147, and this effect was abolished by both truncations. Thapsigargin significantly enhanced release and activation of MMPs (MMP-2 and MMP-9) in non-transfected 7721 cells, and this effect was negatively regulated by SNAP. However, no effects of thapsigargin or SNAP were observed in T7721 cells, and expression of HAb18G/CD147 enhanced secretion and activation of MMPs at a stable and high level. Taken together, these results suggest that both ectodomain and intracellular domains of HAb18G/CD147 are required to mediate the effect of HAb18G/CD147 on the secretion and activation of MMPs and metastasis-related processes in human hepatoma cells by disrupting the regulation of NO/cGMP-sensitive intracellular Ca2+ mobilization although each domain may play different roles.
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Affiliation(s)
- J L Jiang
- Cell Engineering Research Center, Fourth Military Medical University, 710032, Xi'an, China
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27
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Abstract
PURPOSE The authors document an animal model of retinal pigment epithelial (RPE) detachments. METHODS N-ethylmaleimide (NEM) and sodium iodate (sulfhydryl-alkylating agents) were injected into the vitreous of Dutch pigmented rabbits. Subretinal fluid samples were withdrawn 0.5 and 3 hours after NEM injections and analyzed for albumin content by gel electrophoresis. Selected eyes were examined histologically. RESULTS Injections of 9.2 micrograms NEM caused wrinkling of the retina within 15 minutes, at which time fluorescein angiography revealed multifocal RPE detachments. At this stage, histologic sections showed moderate choroidal edema and RPE detachment. Elevated retinal detachments developed over the next 15 to 25 minutes. Histologic sections showed massive choroidal edema and RPE fragmentation. The albumin concentration of subretinal fluid rose from 60% of serum level at 30 minutes after NEM to 80% after 3 hours. Sodium iodate did not cause choroidal edema or RPE detachment. CONCLUSION In rabbits, intravitreal NEM causes the rapid appearance of choroidal edema and RPE detachment, followed by serous retinal detachment. The initial effect probably is caused by an alteration of choroidal vascular permeability. The relationship of these effects to sulfhydryl alkylation is unclear because sodium iodate failed to produce RPE detachments. N-ethylmaleimide effects may model aspects of clinical RPE and serous retinal detachments.
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Affiliation(s)
- C H Chon
- Department of Ophthalmology, Stanford University School of Medicine, California, USA
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28
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Abstract
This study asks whether retinal adhesiveness is affected by cytochalasin D, a drug that is known to alter the apical morphology of the retinal pigment epithelium (RPE). Cytochalasin D was injected intravitreally in Dutch rabbits and retinal adhesiveness measured 0.5 to 72 h later by two methods: in vitro peeling of the retina from retinal pigment epithelium to observe the amount of adherent pigment, and in vivo measurement of the pressure needed to achieve retinal separation. Electroretinograms were recorded, and RPE apical morphology was examined by scanning electron microscopy. The injection of 60 microM cytochalasin D caused in vitro retinal adhesiveness to fall within 3 h to 10% of normal although the electroretinogram (a, b, and c-waves) remained normal. Smaller doses of cytochalasin D had a lesser effect. The RPE apical surface at 3 h showed large bullet-like microvilli, swollen cone sheaths, and an absence of filamentous microvilli. The severity of these changes was dose-related. At 72 h after cytochalasin D, retinal adhesiveness had largely recovered, and RPE apical morphology appeared normal again. Thus, cytochalasin D weakens retinal adhesiveness acutely but reversibly, and both the initial effect and recovery correlate with changes in RPE microvillar morphology. This suggests that actin microfilaments may be involved in mechanisms of retinal adhesion.
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Affiliation(s)
- R K Chiang
- Department of Ophthalmology, Stanford University School of Medicine, CA, USA
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29
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Abstract
OBJECTIVE To assess the participation of cone matrix sheaths, which are domains of the cone photoreceptor-associated interphotoreceptor matrix that extend from the neural retina to the surface of the retinal pigment epithelium (RPE), in retinal adhesion. METHODS Monkey and human retinas were partially peeled from the RPE, and the tissues were examined by lectin histochemistry to determine the effects of physical separation on the cone matrix sheath. RESULTS A firm attachment of cone matrix sheaths to both the RPE and the neural retina that was strong enough to cause detachment of sheets of RPE cells from Bruch's membrane or tearing of the sheaths as a result of retinal peeling was observed. Cone matrix sheaths can stretch considerably and contract following tearing. Their integrity was compromised rapidly after the first postmortem minute. CONCLUSION Cone matrix sheath glycoconjugates are likely to play a major role in mediating retinal adhesion by forming a molecular bridge between the neural retina and the RPE.
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Affiliation(s)
- G S Hageman
- Department of Ophthalmology, the Anheuser-Busch Eye Institute, University School of Medicine, St Louis MO, USA
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30
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Abstract
OBJECTIVE To determine the oxygen and glucose dependency of retinal adhesion in primate and rabbit. METHODS Experiments were performed on Dutch rabbits and monkeys. Retinal adhesiveness was measured by peeling the retina from the retinal pigment epithelium in vitro, under different conditions of PO2 and glucose supply, and by observing the amount of adherent pigment. In vivo ischemia was produced by raising the intraocular pressure. RESULTS Retinal adhesion failed quickly at low oxygen tensions, but a well-oxygenated solution preserved strong retinal adhesion in vitro for 15 to 20 minutes in rabbit tissue and up to 50 minutes in primate tissue. Ischemic adhesive failure was reversible on raising the PO2. Glucose levels did not affect adhesiveness. Ischemia in vivo for more than 1 minute caused rabbit retina to lose its adhesiveness. CONCLUSIONS Retinal adhesion is continually and reversibly dependent on oxygenation, and probably on aerobic metabolism. Primate tissue is more resistant to metabolic adhesive failure than is rabbit tissue, but the metabolic requirements appear qualitatively similar.
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Affiliation(s)
- M F Marmor
- Department of Ophthalmology, Stanford University School of Medicine, Calif
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31
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Yao XY. [Raising the level of pathological diagnosis and prognosis of breast carcinoma]. Zhonghua Bing Li Xue Za Zhi 1994; 23:323-6. [PMID: 7720107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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Takeuchi A, Kricorian G, Yao XY, Kenny JW, Marmor MF. The rate and source of albumin entry into saline-filled experimental retinal detachments. Invest Ophthalmol Vis Sci 1994; 35:3792-8. [PMID: 7928176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
PURPOSE To investigate the rate and source of albumin entry into experimental nonrhegmatogenous detachments. METHODS Detachments were made in Dutch rabbits by injecting Hanks' balanced salt solution into the subretinal space through a micropipette. Subretinal fluid was withdrawn 0 to 4 hours later through a similar micropipette and analyzed for osmolality and albumin content (by gel electrophoresis). Sodium iodate was injected intravenously in some rabbits to damage the retinal pigment epithelium (RPE). In some rabbits fluorescein isothiocyanate albumin (FITC-albumin) was injected intravitreally or intravenously to measure its entry into the subretinal fluid by fluorophotometry. Results from 4 to 8 eyes were averaged for each data point. RESULTS The albumin concentration and total amount of albumin in the subretinal fluid increased steadily over 4 hours in retinal detachments initially filled with Hanks' solution. Pretreating rabbits with sodium iodate injection resulted in a 50-fold increase in the rate of albumin entry, although the levels were still low relative to those of serum. Intravitreal FITC-albumin entered the subretinal fluid at a rate independent of sodium iodate damage, but intravenous FITC-albumin only entered the subretinal space after RPE damage. Subretinal fluid osmolality remained within the range of 291 to 294 mOsm/kg, irrespective of sodium iodate damage or differences in the rate of fluid absorption. CONCLUSIONS These results indicate that albumin can diffuse into the rabbit subretinal space from both vitreous and bloodstream, although entry from serum requires damage to the RPE. Subretinal fluid appears to be transported actively (control eyes) or passively (iodate-damaged eyes) out of the subretinal space, despite albumin entry and without major osmolar shifts.
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Affiliation(s)
- A Takeuchi
- Department of Ophthalmology, Beckman Center, Stanford University Medical Center, California
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Abstract
OBJECTIVE To evaluate experimentally the conditions necessary for the formation of serous detachments. METHODS Selective injury to the retinal pigment epithelium (RPE) and choriocapillaris was produced in cats using weak laser burns and intense diffuse light, with or without photosensitization with rose bengal. The fundi were analyzed by observation, fluorescein angiography, and histologic examination. RESULTS Injuring the RPE alone did not cause detachments. Focal injury to the RPE and choriocapillaris caused moderate detachment only when an area surrounding the focal leakage site had been subjected to light damage. Diffuse injury to the RPE and choriocapillaris caused broader detachments. CONCLUSIONS Three conditions are necessary for serous detachments to form: (1) a source of fluid pressure, (2) a defect in the blood-retinal barrier (entry site), and (3) an area of impaired fluid transport beyond the site of leakage (if fluid is to accumulate over a broader area).
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Affiliation(s)
- M F Marmor
- Department of Ophthalmology, Stanford University School of Medicine, Calif
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34
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Yao XY, Hageman GS, Marmor MF. Retinal adhesiveness in the monkey. Invest Ophthalmol Vis Sci 1994; 35:744-8. [PMID: 8113025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
PURPOSE To determine factors that influence retinal adhesion in the primate and compare these with previous data from the rabbit. METHODS Retinal adhesiveness was studied in monkey eyes immediately after enucleation. The retina was peeled manually from the retinal pigment epithelium, and the amount of pigment that remained adherent to the retina was used as an index of adhesiveness. RESULTS The rate of post mortem failure of retinal adhesiveness in the monkey was less than in the rabbit under similar conditions. However, as in the rabbit, adhesiveness was sensitive to temperature, pH, and the concentrations of calcium and magnesium, and subretinal injections of neuraminidase weakened adhesion beyond the injection sites. CONCLUSIONS Mechanisms of retinal adhesion are similar in primates and rabbits.
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Affiliation(s)
- X Y Yao
- Department of Ophthalmology, Stanford University School of Medicine, CA 94305-5308
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35
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Abstract
PURPOSE Retinal adhesion in rabbits and monkeys has been shown to involve the interphotoreceptor matrix and depend on environmental factors, such as temperature, pH, and calcium concentration. This study was designed to see whether these same factors modulate retinal adhesiveness in humans. METHODS Four surgically enucleated human eyes were studied. Strips of eyecup were placed in experimental baths shortly after enucleation to evaluate environmental conditions. Retinal adhesive strength was quantified by the amount of retinal pigment epithelial pigment adherent to retina peeled from strips of eyecup. Cone and rod sheaths of the interphotoreceptor matrix were studied by microscopic examination of samples stained with the lectins peanut and wheat germ agglutinin. RESULTS Retinal adhesiveness fell to 0 approximately 40 minutes after enucleation. Adhesive strength was maintained by cold temperature and was weakened by low pH or low calcium in the bath. Cone and rod matrix sheaths became stretched (indicating a bond) as outer segments and retinal pigment epithelium were peeled apart. CONCLUSION Retinal adhesion in humans appears to involve similar mechanisms as in rabbits and monkeys.
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Affiliation(s)
- M F Marmor
- Department of Ophthalmology, Stanford University School of Medicine, California 94305-5308
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36
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Kim RY, Yao XY, Marmor MF. Oxygen dependency of retinal adhesion. Invest Ophthalmol Vis Sci 1993; 34:2074-8. [PMID: 8491557] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
PURPOSE Normal retina is firmly attached to the retinal pigment epithelium, but the force of this adhesion drops precipitously within the first 2-3 min after enucleation. The purpose was to study metabolic factors that might be relevant to this postmortem failure of adhesion. METHODS Dutch rabbit retina was manually peeled from the retinal pigment epithelium on strips of enucleated eyecup within a 37 degrees C bath. Retinal adhesiveness was measured by observing the amount of retinal pigment epithelium that remained adherent to the retina. RESULTS Autologous whole blood in place of salt solution retarded the decrease in adhesiveness. A solution of hemoglobin alone was similarly effective, whereas methemoglobin solution failed to help the persistence of retinal adhesion. Bubbling oxygen into the salt solution and circulating it to avoid oxygen depletion at the tissue boundary also proved effective at sustaining retinal adhesiveness. Eyes made ischemic in vivo for 5 min or longer, by elevating intraocular pressure, showed virtually no retinal adhesion when enucleated immediately thereafter. However, eyes made ischemic for 10 min, but allowed to regain circulation for 5 min before enucleation, showed a return of retinal adhesiveness to 80% of normal. CONCLUSIONS Oxidative metabolism is critical to the maintenance of retinal adhesiveness, and the effects of oxygen deprivation on adhesion are reversible within a certain time period.
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Affiliation(s)
- R Y Kim
- Department of Ophthalmology, Stanford University School of Medicine, CA 94305-5308
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37
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Amenomori M, Cao Z, Ding LK, Feng ZY, Hibino K, Hotta N, Huang Q, Huo AX, Jia HY, Jiang GZ, Jiao SQ, Kajino F, Kasahara K, Mei DM, Meng L, Meng XR, Mizutani K, Mu J, Nanjo H, Nishizawa M, Oguro A, Ohnishi M, Ohta I, Ren JR, Saito T, Sakata M, Shi ZZ, Shibata M, Shirai T, Sugimoto H, Sun XX, Tai A, Taira K, Tan YH, Tateyama N, Torii S, Wang H, Wen CZ, Yamamoto Y, Yao XY, Yu GC, Yuan P, Yuda T, Zeng JG, Zhang CS, Zhang HM, Zhang L, Zhou WD. Cosmic-ray deficit from the directions of the Moon and the Sun detected with the Tibet air-shower array. Phys Rev D Part Fields 1993; 47:2675-2681. [PMID: 10015867 DOI: 10.1103/physrevd.47.2675] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Amenomori M, Cao Z, Ding LK, Feng ZY, Hibino K, Hotta N, Huang Q, Huo AX, Jia HY, Jiang GZ, Jiao SQ, Kajino F, Kasahara K, Mei DM, Meng L, Meng XR, Mizutani K, Mu J, Nanjo H, Nishizawa M, Oguro A, Ohnishi M, Ohta I, Ren JR, Saito T, Sakata M, Shi ZZ, Shibata M, Shirai T, Sugimoto H, Sun XX, Tai A, Taira K, Tan YH, Tateyama N, Torii S, Wang H, Wen CZ, Yamamoto Y, Yao XY, Yu GC, Yuan P, Yuda T, Zeng JG, Zhang CS, Zhang HM, Zhang L, Zhou WD. Search for steady emission of 10-TeV gamma rays from the Crab Nebula, Cygnus X-3, and Hercules X-1 using the Tibet air shower array. Phys Rev Lett 1992; 69:2468-2471. [PMID: 10046502 DOI: 10.1103/physrevlett.69.2468] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Zheng H, Lin DC, Hong BT, Yao XY. Nuclear morphometry and its prognostic significance in laryngeal squamous cell carcinomas. Chin Med J (Engl) 1992; 105:410-4. [PMID: 1499373] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
The five parameters including nuclear area (NA), nuclear perimeter (NP), nuclear diameter (ND), axis ratio and nuclear roundness were evaluated with MIAS200 Image Analysis System (Sichuan University, Chengdu) in 45 patients with laryngeal primary squamous cell carcinoma, which were confirmed pathologically and operated on from January 1977 to October 1987. The results showed that NA, NP and ND are important prognostic indicators. The survival rate in patients with large nuclei (NA greater than 73 microns2, NP greater than 32.5 microns, ND greater than 12 microns) was significantly lower than that in those with small nuclei (NA less than 73 microns2, NP less than 32.5 microns, ND less than 12 microns) (P less than 0.0025). These findings strongly suggest that patients with laryngeal squamous cell carcinoma with large nuclei should be treated more aggressively.
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Affiliation(s)
- H Zheng
- Department of Otolaryngology, West China University of Medical Sciences, Chengdu
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40
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Abstract
Serous retinal detachments have been produced experimentally by occluding the choroidal circulation. We sought a more realistic model by adjusting rose bengal photosensitization to injure the retinal pigment epithelium and choriocapillaris in rabbits without causing vascular occlusion. We accomplished this by either using low doses of rose bengal or cooling the animal to reduce ocular temperature by 4 degrees C. Detachments typically appeared within 1 day after light exposure, centered over the area of light damage. Fluorescein angiography showed no capillary occlusion, but there was leakage of dye from areas of light damage. Light microscopy of light-damaged areas showed swelling or disruption of retinal pigment epithelial cells but a patent choriocapillaris. These data suggest that a combination of retinal pigment epithelial and choriocapillary damage may be necessary for serous detachment to occur.
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Affiliation(s)
- X Y Yao
- Department of Ophthalmology, Stanford University School of Medicine, CA 94305-5308
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41
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Yao XY, Hageman GS, Marmor MF. Recovery of retinal adhesion after enzymatic perturbation of the interphotoreceptor matrix. Invest Ophthalmol Vis Sci 1992; 33:498-503. [PMID: 1544777] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Previous investigations established that focal subretinal injections of neuraminidase, chondroitinase, and hyaluronidase in the rabbit lead to a diffuse loss of retinal adhesiveness beyond the site of injection. This loss of adhesiveness, measured by peeling of the retina immediately after enucleation, correlates with changes in the interphotoreceptor matrix (IPM), as monitored by lectin histochemistry. In this study, rabbits were evaluated during recovery of retinal adhesiveness after subretinal injections of neuraminidase and chondroitinase. Adhesion recovered steadily 5-20 days after chondroitinase injection. After administration of neuraminidase, adhesion remained low for approximately 14 days but recovered to normal by 20 days. The recovery of adhesiveness correlated closely with reestablishment of the normal distribution of peanut agglutinin-binding glycoconjugates in the IPM, one group of molecules thought to participate in retinal adhesion. Electroretinography and light microscopy showed no abnormalities in the retina or retinal pigment epithelium after recovery. These results suggest that IPM glycoconjugates participate in maintaining retinal adhesion.
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Affiliation(s)
- X Y Yao
- Department of Ophthalmology, Stanford University School of Medicine, California 94305
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42
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Yao XY. [The expression of nuclear estrogen receptor and its relation to cytoplasmic estrogen receptor in breast cancer]. Zhonghua Bing Li Xue Za Zhi 1992; 21:37-9. [PMID: 1319848] [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: 12/26/2022]
Abstract
Sixty specimens of breast cancer were assayed with ER-monoclonal antibody by immunocytochemical staining. Twenty-nine (48.33%) were nuclear estrogen receptor positive (ERn+). The number of ERn+ cancer cells decreased in the following sequence: mucinous carcinoma, invasive lobular carcinoma, invasive ductal carcinoma, and papillary adenocarcinoma. Two apocrine carcinomas were ERn-. ERn+ rate was higher in patients over 60 years of age (P less than 0.05). The amount of ERn+ cells was much greater in cancer cells than in the surrounding benign epithelial cells. This phenomenon may indicate that malignant cells are more hormone-dependent than benign cells. The results of immunocytochemical staining and steroid binding assay were compared. By immunocytochemical staining, twenty-four of fifty-seven cases (42.11%) were ERn+ and ERc+. Sixteen cases (28.07%) were ERn- and ERc-. This study showed that in a number of breast cancers ERs were positive in both cytoplasms and nuclei and the concordant rate was 70.18%. In the remaining cases 13 (22.81%), ERs were positive in the cytoplasm, and in 4 cases (7.02%) positive in nuclei only. Additionally, fifty-two out of 60 cases were assayed by 3H-estradiol and 3H-R5020 by means of steroid binding assay. Twenty-seven cases of them (51.92%) showed ERc+ and PRc+, and seventeen cases (32.69%) were ERc- and PRc-. Their correspondent rate was 84.61%.
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Affiliation(s)
- X Y Yao
- Department of Pathology, West China University of Medical Sciences, Chengdu
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43
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Fernandes BJ, Yao XY, Hao Y, Sutherland DJ, Sidlofsky S, Blackstein ME. DNA content and estrogen receptors in primary carcinoma of the breast. Can J Surg 1991; 34:349-55. [PMID: 1714340] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
DNA content and estrogen-receptor status were studied in 54 consecutive patients with primary breast carcinoma. Estrogen-receptor determinations were performed by immunohistochemical assay on frozen sections with a monoclonal antibody against the estrogen-receptor molecule and by biochemical analysis with a dextran-coated charcoal method. Nuclear DNA content was measured by flow cytometry performed on formalin-fixed, paraffin-embedded sections. Seventy-two percent of tumours were positive for estrogen receptors by immunohistochemical assay and 67% by biochemical assay. Comparison of the qualitative results of immunohistochemical and biochemical estrogen-receptor determinations revealed a strong correlation between the two assays, with agreement in 90% of the cases (p less than 0.001). Regression analysis showed only a weak relationship between the quantitative results of the two assays. DNA analysis was performed in 51 cases, and 54% demonstrated aneuploid stemlines by flow cytometry. An association was demonstrated between aneuploidy and low levels of estrogen receptor. The association was highly significant with the immunohistochemical assay but not with the biochemical assay. The authors' results suggest that immunohistologic determinations of estrogen receptor status may better reflect the biologic features of the tumour cells. However, improved standardization in reporting the results is necessary if the test is to have widespread use.
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Affiliation(s)
- B J Fernandes
- Department of Pathology, Mount Sinai Hospital, Toronto, ON
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44
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Xue LF, Yao XY, Wang CT. [Influences of open thoracoscopy on human body: experience in 65 cases]. Zhonghua Nei Ke Za Zhi 1991; 30:409-11, 455. [PMID: 1752153] [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: 12/28/2022]
Abstract
The influence of open thoracoscopy with fiber-bronchoscope on human body was studied in 65 patients with pleural disease. The items observed included blood pressure, Pulse rate, respiration rate, blood gas analysis and clinical manifestations. It was found that open thoracoscopy has little influence on human body and the patients tolerated it well. No severe complication was found and operative procedures might be avoided popularization of this technique is therefore suggested.
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Affiliation(s)
- L F Xue
- Shandong Provincial Hospital
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45
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Yao XY, Fernandes BJ. [The relation of deoxyribonucleic acid contents and nuclear estrogen receptors in breast cancers]. Zhonghua Bing Li Xue Za Zhi 1991; 20:28-31. [PMID: 2065372] [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: 12/30/2022]
Abstract
Flow cytometry was applied to the analysis of DNA contents in 59 cases of breast cancer, among which 28 cases were diploidy cancers, and 31 were aneuploid. DNA index of these cases was found to be ranging from 0.45 to 3.35, including S-phase fraction (SPF) from 2.46% to 78.87%, and proliferation index (PI) from 17.06 to 87.04. In 60 cases of breast carcinoma, nuclear estrogen receptors (ERn) were assayed by immunocytochemistry with ER-monoclonal antibody. 29 of them were ERn-, and 31 were ERn+. The DNA contents and ERn levels, both detected in each of 57 cases, were found to be correlated to some extent. In aneuploidy cancer group, there were more ERn- cases than ERn+ cases (P less than 0.05). The mean value of PI was higher in the ERn- group than in the ERn+ group, and the corresponding ERn- cases were more frequent with increase of PI value. Among those cases in which SPF was over 40%, there were more ERn- cases than ERn+ cases. The relations between ERn levels and DNA contents may represent the degree of differentiation of breast cancers and may help to predict prognosis.
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Affiliation(s)
- X Y Yao
- Department of Pathology, West China University of Medical Sciences Chengdu
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Abstract
Pigmented rabbits were given mannitol intravenously, and at various times thereafter blood osmolality was measured and eyes were enucleated to measure retinal adhesiveness to the retinal pigment epithelium. Both blood osmolality and retinal adhesion increased in proportion to the dose of mannitol. We found a measurable increase in retinal adhesion as early as 10 minutes and as late as 4 hours after mannitol injection. We suspect that mannitol dehydrates the subretinal space and thereby enhances the adhesive properties of the interphotoreceptor matrix or tightens the interdigitation between photoreceptors and pigment epithelial cells. Our data suggest that mannitol could have clinical application in the management of retinal detachments.
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Affiliation(s)
- X Y Yao
- Department of Ophthalmology, Stanford University School of Medicine, CA 94305
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Yao XY, Hageman GS, Marmor MF. Retinal adhesiveness is weakened by enzymatic modification of the interphotoreceptor matrix in vivo. Invest Ophthalmol Vis Sci 1990; 31:2051-8. [PMID: 2211002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
The role of interphotoreceptor matrix (IPM) constituents in mediating adhesion between the retina and retinal pigment epithelium (RPE) was investigated by injecting specific enzymes into rabbit eyes either intravitreally or subretinally. Retinal adhesiveness was measured by peeling the retina from the pigment epithelium 1-3 days later and observing the amount of adherent pigment. Effects of enzymes on the IPM were monitored by observation of peanut agglutinin (PNA) binding to cone matrix sheaths; retinal and RPE toxicity was excluded by electroretinography and histology. Three enzymes that degrade glycosaminoglycans or saccharides known to be constituents of the IPM (chondroitinase ABC, neuraminidase, and testicular hyaluronidase) both weakened adhesion and altered PNA binding, although the effects on the cone matrix sheaths were different for each enzyme. An enzyme specific for hyaluronic acid (Streptomyces-derived hyaluronidase), which has not been identified as a major IPM constituent, had no effect on either adhesion or PNA binding. The authors conclude that IPM-associated glycoconjugates participate in retinal adhesion, although their precise composition, interaction with IPM components, and relationship to other mechanisms of adhesion remain to be determined.
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Affiliation(s)
- X Y Yao
- Department of Ophthalmology, Stanford University School of Medicine, California 94305
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48
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Yao XY. [Sequelae in 4122 cases of cesarean section]. Zhonghua Fu Chan Ke Za Zhi 1990; 25:15-7, 61. [PMID: 2323269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
From 1986-1987, there were altogether 28,048 deliveries in our hospital, and there were 4,122 cases of Cesarean section, a rate of 14.69%. Early postoperative complications occurred in 522 cases (12.66%). These were namely: postpartum hemorrhage 242 cases (5.87%), postoperative morbidity 151 cases (3.66%), bladder injury during operation 6 cases (0.15%), urinary fistula 1 case, transient hematuria after operation 39 cases (0.95%). 348 Cesarean section cases were followed-up 1-3 years after operation and 44 of them were found to suffer from late complications (12.64%). These included chronic overiosalpingitis 23 cases (6.6%), parametritis 9 cases (2.58%), paracystitis 6 cases (1.7%), abdominal incision scar endometriosis 3 cases (0.86%), ectopic pregnancy 3 cases (0.86%).
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Chen WB, Yao XY. [Clinical and pathologic comparison of adult respiratory distress syndrome and infant respiratory distress syndrome]. Zhonghua Nei Ke Za Zhi 1989; 28:597-600, 636. [PMID: 2632170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The authors compared the clinical and pathological findings between adult respiratory distress syndrome (ARDS), and infant respiratory distress syndrome (IRDS). In ARDS, the most common causes were injury, infection, shock and acidosis. The clinical course was longer. The weight of the lungs increased markedly, the hyaline membrane formation in the alveoli was late in the clinical course, and the degree of edema in the interstitium of the lungs and microthrombosis within the blood vessels was more serious. The pathogenesis of ARDS was related to the activation of the complements and neutrophils by inflammation in which proteinase, oxygen radical, thromboxane, leukotriene and prostaglandin were released. Thus the endothelial cells of the blood vessels and capillary-alveoli membrane were damaged by these mediators. On the other hand, the main contributory factors of IRDS were suffocation of premature fetus by various reasons in the uterus and aspiration of meconium during delivery by the infant. The clinical course was shorter, alveolar hemorrhage and collapse were severe and hyaline membrane in alveoli was formed in early stage of the clinical course. Insufficiency of surfactant in premature fetus, damage of the surfactant system by hypoxia, aspiration of foreign materials and defect of the epithelial cells of infant were the pathogenic factors of IRDS, they resulted in increase of permeability of fluid and, as a result, led to pulmonary edema and atelectasis.
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Marmor MF, Yao XY. The enhancement of retinal adhesiveness by ouabain appears to involve cellular edema. Invest Ophthalmol Vis Sci 1989; 30:1511-4. [PMID: 2744994] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
Our previous work showed that ouabain increases retinal adhesion to the retinal pigment epithelium, but the mechanism of this effect has been unclear. In this study, we have found that the ouabain-induced increase in retinal adhesiveness was blocked reversibly by removing sodium from the medium or by exposure to hyperosmotic solution. Hyposmotic solution slowed down the postmortem failure of adhesion. Tissue edema could not be documented histologically, but retinal tissue water content increased by 2.9% after exposure to ouabain. These data suggest that the ouabain effect involves cellular edema, which may enhance adhesion by tightening the interdigitation between photoreceptor outer segments and retinal pigment epithelial microvilli.
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Affiliation(s)
- M F Marmor
- Department of Ophthalmology, Stanford University Medical Center, California
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