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Li XQ, Cheng XJ, Wu J, Wu KF, Liu T. Targeted inhibition of the PI3K/AKT/mTOR pathway by (+)-anthrabenzoxocinone induces cell cycle arrest, apoptosis, and autophagy in non-small cell lung cancer. Cell Mol Biol Lett 2024; 29:58. [PMID: 38649803 PMCID: PMC11036658 DOI: 10.1186/s11658-024-00578-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Accepted: 04/10/2024] [Indexed: 04/25/2024] Open
Abstract
Non-small cell lung cancer (NSCLC), characterized by low survival rates and a high recurrence rate, is a major cause of cancer-related mortality. Aberrant activation of the PI3K/AKT/mTOR signaling pathway is a common driver of NSCLC. Within this study, the inhibitory activity of (+)-anthrabenzoxocinone ((+)-ABX), an oxygenated anthrabenzoxocinone compound derived from Streptomyces, against NSCLC is demonstrated for the first time both in vitro and in vivo. Mechanistically, it is confirmed that the PI3K/AKT/mTOR signaling pathway is targeted and suppressed by (+)-ABX, resulting in the induction of S and G2/M phase arrest, apoptosis, and autophagy in NSCLC cells. Additionally, the augmentation of intracellular ROS levels by (+)-ABX is revealed, further contributing to the inhibition of the signaling pathway and exerting inhibitory effects on tumor growth. The findings presented in this study suggest that (+)-ABX possesses the potential to serve as a lead compound for the treatment of NSCLC.
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Affiliation(s)
- Xiao-Qian Li
- The Third Affiliated Hospital of Zunyi Medical University, The First People's Hospital of Zunyi), Scientific Research Center, Guizhou, 563002, People's Republic of China
| | - Xiao-Ju Cheng
- The Third Affiliated Hospital of Zunyi Medical University, The First People's Hospital of Zunyi), Scientific Research Center, Guizhou, 563002, People's Republic of China
| | - Jie Wu
- The Third Affiliated Hospital of Zunyi Medical University, The First People's Hospital of Zunyi), Scientific Research Center, Guizhou, 563002, People's Republic of China
| | - Kai-Feng Wu
- The Third Affiliated Hospital of Zunyi Medical University, The First People's Hospital of Zunyi), Scientific Research Center, Guizhou, 563002, People's Republic of China.
| | - Tie Liu
- The Third Affiliated Hospital of Zunyi Medical University, The First People's Hospital of Zunyi), Scientific Research Center, Guizhou, 563002, People's Republic of China.
- Yunnan Characteristic Plant Extraction Laboratory, Key Laboratory of Medicinal Chemistry for Natural Resource, Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education and Yunnan Province, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, People's Republic of China.
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Huang SQ, Huang RH, Quan Y, Wang FM, Cheng XJ, Wang XQ, Zhang X. [Evaluation of differences in quality of life in patients with chronic graft-versus-host disease]. Zhonghua Xue Ye Xue Za Zhi 2024; 45:54-61. [PMID: 38527839 DOI: 10.3760/cma.j.cn121090-20231008-00162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 03/27/2024]
Abstract
Objective: To evaluate the status of, differences in, and factors influencing quality of life (QoL) in patients with chronic graft-versus-host disease (GVHD). Methods: From September 2021 to February 2023, a cross-sectional study of 140 patients with chronic GVHD was conducted at our center. Symptom burden was assessed by the Lee Symptomatology Scale (LSS), and QoL was assessed by the Medical Outcome Study 36-Item Short-Form Health Survey (SF-36) (version 1) and five-level EuroQoL five-dimensional questionnaire (EQ-5D-5L). Results: Data from 140 respondents, including 32 (22.9%) with mild chronic GVHD, 87 (62.1%) with moderate chronic GVHD, and 21 (15.0%) with severe chronic GVHD, were analyzed. Of the respondents, 61.4% were male, and the median transplantation age was 34 (15-68) years. The primary diagnoses were acute myeloid leukemia (50.0%), acute lymphoblastic leukemia (20.0%), and myelodysplastic syndrome (15.0%). The common chronic GVHD-affected organs included the skin in 74 patients (52.9%), the eyes in 57 patients (40.7%), and the liver in 50 patients (35.7%). Among the whole cohort, the eye (20.48±23.75), psychological (16.13±17.00), and oral (13.66±20.55) scores were highest in the LSS group. The physiological function (36.07±11.13), social function (36.10±10.68), and role-emotional functioning (38.36±11.88) scores were lowest in the SF-36 group. The EQ-5D index was 0.764. The total LSS scores for mild, moderate, and severe chronic GVHD were 6.51±6.15, 10.07±5.61, and 20.90±10.09, respectively. The SF-36 physical component scores (PCSs) were 43.12±6.38, 40.73±7.14, and 36.97±6.97, respectively, and the mental component scores (MCSs) were 43.00±8.47, 38.90±9.52, and 28.96±9.63, respectively. The EQ-5D values were 0.810±0.124, 0.762±0.179, and 0.702±0.198, respectively. The multivariate analysis showed that the overall symptom burden (β=-0.517), oral symptom burden (β=-0.456), National Institute of Health (NIH) criteria for the eyes (β=-0.376), and nutrition-related symptom burden (β=-0.211) were significantly negatively correlated with the PCS. The NIH score (β=-0.260) was negatively correlated with the MCS score. Oral symptom burden (β=-0.400), joint/fascia NIH criteria (β=-0.332), number of involved systems (β=-0.253), overall NIH criteria (β=-0.205), and number of immunosuppressants taken (β=-0.171) were significantly negatively correlated with the EQ-5D score (all P<0.05). Medium to strong correlations were found between the EQ-5D score and the SF-36 score (|r|=0.384-0.571, P<0.001). Conclusions: The QoL of patients with chronic GVHD is impaired, and the more severe the disease, the poorer the QoL. Overall symptom burden, severity of eyes, and oral symptom burden were the most important factors affecting QoL.
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Affiliation(s)
- S Q Huang
- Medical Center of Hematology, Xinqiao Hospital of Army Medical University, Chongqing Key Laboratory of Hematology and Microenvironment, State Key Laboratory of Trauma and Chemical Poisoning, Chongqing 400037, China
| | - R H Huang
- Medical Center of Hematology, Xinqiao Hospital of Army Medical University, Chongqing Key Laboratory of Hematology and Microenvironment, State Key Laboratory of Trauma and Chemical Poisoning, Chongqing 400037, China
| | - Y Quan
- Medical Center of Hematology, Xinqiao Hospital of Army Medical University, Chongqing Key Laboratory of Hematology and Microenvironment, State Key Laboratory of Trauma and Chemical Poisoning, Chongqing 400037, China
| | - F M Wang
- Medical Center of Hematology, Xinqiao Hospital of Army Medical University, Chongqing Key Laboratory of Hematology and Microenvironment, State Key Laboratory of Trauma and Chemical Poisoning, Chongqing 400037, China
| | - X J Cheng
- Medical Center of Hematology, Xinqiao Hospital of Army Medical University, Chongqing Key Laboratory of Hematology and Microenvironment, State Key Laboratory of Trauma and Chemical Poisoning, Chongqing 400037, China
| | - X Q Wang
- Medical Center of Hematology, Xinqiao Hospital of Army Medical University, Chongqing Key Laboratory of Hematology and Microenvironment, State Key Laboratory of Trauma and Chemical Poisoning, Chongqing 400037, China
| | - X Zhang
- Medical Center of Hematology, Xinqiao Hospital of Army Medical University, Chongqing Key Laboratory of Hematology and Microenvironment, State Key Laboratory of Trauma and Chemical Poisoning, Chongqing 400037, China Jinfeng Laboratory, Chongqing 400037, China
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Shao YJ, Hao JL, Cheng XJ, Chen L, Wang SS, Wang K. [Analysis on the concept and clinical practice of patient-controlled analgesia in the treatment of cancer pain by Chinese medical providers]. Zhonghua Yi Xue Za Zhi 2022; 102:3103-3109. [PMID: 36274593 DOI: 10.3760/cma.j.cn112137-20220304-00455] [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: 06/16/2023]
Abstract
Objective: To investigated the concept and clinical practice of patient-controlled analgesia (PCA) in the treatment of cancer pain. Methods: Doctors, nurses, pharmacists from the oncology department, pain department, or hospice department were investigated using an electronic questionnaire from December 1 to December 31, 2021. In addition to the basic information, there were 26 questions were collected, including the current situation of cancer pain treatment, the concept of medical staff on PCA treatment of cancer pain and the clinical practice of PCA. Results: Questionnaires from 2 872 medical staff were collected from 993 hospitals in 30 provincial administrative units. Only 34.8% (955/2 748) of medical staff considered that the satisfaction rate of cancer pain control was over 75%, and 27.9% (548/1 968) of medical staff convinced that the satisfaction rate of breakthrough pain control was less than 50%. 97.1% (2 439/2 513) of medical staff considered that PCA could be effectively used for cancer pain treatment. The proportion of medical staff in secondary and tertiary hospitals who thought that PCA was applicable to cancer pain that could not be effectively alleviated by standardized non-invasive drug administration was 64.6% (319/494) and 69.1% (1 262/1 826) respectively, which was higher than that in primary hospitals [57.0% (110/193)] (P=0.002). In different occupations, the proportion of nurses who convinced PCA treatment of cancer pain increased the risk of addiction and drug overdose was 62.8% (431/686) and 76.1% (522/686), respectively, which was higher than doctors [39.2% (670/1709) and 58.2% (995/1709), respectively] and pharmacists [49.2% (58/118) and 65.3% (77/118), respectively] (all P<0.001). There was no significant difference in type of pump, route of administration, mode of infusion, protocol for PCA administration and selection of common medication in PCA treatment of cancer pain among different hospitals (all P>0.05). The calculation of continuous infusion dose and rescue dose of PCA was not uniform among different hospitals. After initiation of PCA, 71.7% (1 226/1 709) of hospitals had insufficient analgesia and most of them needed to be adjusted for 1-3 times to achieve satisfactory analgesia. Conclusion: Medical staff have insufficient cognition of PCA treatment of cancer pain and there is a lack of unified guidance in clinical practice. Therefore, it is an urgent need to develop an expert consensus on PCA treatment of cancer pain.
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Affiliation(s)
- Y J Shao
- Department of Pain Management,Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Tianjin Key Laboratory of Cancer Prevention and Therapy, Tianjin Clinical Research Center for Cancer, Tianjin 300060, China
| | - J L Hao
- Department of Pain Management,Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Tianjin Key Laboratory of Cancer Prevention and Therapy, Tianjin Clinical Research Center for Cancer, Tianjin 300060, China
| | - X J Cheng
- Department of Pain Management,Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Tianjin Key Laboratory of Cancer Prevention and Therapy, Tianjin Clinical Research Center for Cancer, Tianjin 300060, China
| | - L Chen
- Department of Pain Management,Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Tianjin Key Laboratory of Cancer Prevention and Therapy, Tianjin Clinical Research Center for Cancer, Tianjin 300060, China
| | - S S Wang
- Department of Pain Management,Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Tianjin Key Laboratory of Cancer Prevention and Therapy, Tianjin Clinical Research Center for Cancer, Tianjin 300060, China
| | - K Wang
- Department of Pain Management,Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Tianjin Key Laboratory of Cancer Prevention and Therapy, Tianjin Clinical Research Center for Cancer, Tianjin 300060, China
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Cheng XJ, Hu GQ. [Progress in research of burden of disease attributed to population ageing]. Zhonghua Liu Xing Bing Xue Za Zhi 2020; 41:1915-1920. [PMID: 33297661 DOI: 10.3760/cma.j.cn112338-20191220-00905] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To summarize recent progress in research of burden of disease attributed to population ageing and provide reference for relevant research in the future. Methods: We conducted a systematic literature review of quantitative studies about the impact of population ageing on burden of disease published from 2009 to 2019 according to the inclusion and exclusion criteria through PubMed, Web of Science, Embase, Cochrane Library, Wangfang database and China National Knowledge Infrastructure (CNKI) databases and extracted basic information and key results of the searched literature. Results: A total of 65 studies were included in the analysis, in which 29 (44.6%) studies used death number or mortality rate as outcome measures, 43 (66.2%) studies focused on a single country, such as China, United Kingdom and United States, 39 (60.0%) studies quantified the impact of population ageing on single disease, such as diabetes, lung cancer and coronary heart disease, 44 (67.7%) studies used decomposition methods to quantify the impact of population ageing, and 10 (15.4%) studies evaluated the effect of interventions on alleviating the impact of population ageing. Most studies found that population ageing increased the burden of some diseases, such as cancer, cardiovascular disease and dementia, while a few studies reported that population ageing decreased the burden of some diseases, such as neonatal disease and malaria. Various decomposition methods were adopted in 65 included studies, but several common methods were sensitive to the preconditions that were assumed, the decomposition order of three factors (population size, age structure, and age-specific rate) and the choice of control group, resulting incomparable and unstable results. Conclusions: The published decomposition studies adopted various methods and only evaluated the impact of population ageing in very limited countries and for several diseases. Therefore, a systematic evaluation using robust decomposition method is very necessary to evaluate the impact of population aging on disease burden across countries and diseases.
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Affiliation(s)
- X J Cheng
- Department of Epidemiology and Health Statistics, Xiangya School of Public Health, Central South University, Changsha, 410078, China
| | - G Q Hu
- Department of Epidemiology and Health Statistics, Xiangya School of Public Health, Central South University, Changsha, 410078, China; National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, 410078, China
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Wang Y, Cheng XJ, Yin AH, Cao Y, Zhao ZG, Zhang HJ, Liu DX, Zhang Y, Liu ZX, Lu Y, Jia JC, Liu JT, Pan F. Relationship between sleep disorders and lymphocyte subsets and cytokines in patients with lung cancer. J BIOL REG HOMEOS AG 2018; 32:1231-1237. [PMID: 30334418] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
This study aimed to investigate the relationship between sleep disorders and lymphocyte subsets and cytokines in patients with lung cancer undergoing radiotherapy, and to establish a theoretical foundation for predicting sleep disorders and preventing interventions in radiotherapy in lung cancer patients. Ninety-two patients with lung cancer requiring radiotherapy were selected as the study subjects. The patients' demographic data and disease-related conditions were investigated. Their quality of sleep was measured before radiotherapy, after two and four weeks of radiotherapy, and at the end of radiotherapy. According to the Pittsburgh Sleep Quality Index Number Table (PSQI), patients with PSQI score> 7 points were put into a sleep disorder group, and patients with PSQI score 0-7 were put into a normal sleep group. Lymphocyte subsets were enumerated and cytokine levels (IL-6, IL-1b) were measured during these four periods. The difference in sleep disorders at four weeks between patients with or without synchronous chemotherapy was statistically significant (P less than 0.05). The levels of lymphocyte subsets in the sleep disorder group and the control sleep group showed no difference in the index of lymphocyte subsets before radiotherapy. In the sleep disorder group, CD4+ cells were lower after two weeks of radiotherapy (P less than 0.05). After four weeks of radiotherapy, CD3+, CD4+, and CD16+56+ subsets were lower (P less than 0.05). At the end of radiotherapy, there was no difference in each index. There was no significant difference in IL-6 levels between the two groups before radiotherapy, after two weeks, or after four weeks (P greater than 0.05). At the end of radiotherapy, IL-6 levels in the sleep disorder group were higher than those in the control sleep group (P less than 0.05). There was no significant difference in IL-1b between the two groups (P greater than 0.05). In conclusion, monitoring of T-lymphocyte subsets and IL-6 levels in patients is enhanced during radiotherapy. Clinically effective programs of radiotherapy for lung cancer improve the body's immune status.
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Affiliation(s)
- Y Wang
- Department of Psychiatry, Shandong University School of Medicine, Jinan City, Shandong, People's Republic of China
| | - X J Cheng
- Department of Psychiatry, Shandong Mental Health Center, Jinan City, Shandong, People's Republic of China
| | - A H Yin
- Department of Psychiatry, Shandong Mental Health Center, Jinan City, Shandong, People's Republic of China
| | - Y Cao
- Department of Psychiatry, Shandong Mental Health Center, Jinan City, Shandong, People's Republic of China
| | - Z G Zhao
- School of Foreign Languages and Literature, Shandong University, Jinan City, Shandong, People's Republic of China
| | - H J Zhang
- Department of Medical Psychology and Ethics, Shandong University School of Basic Medical Sciences, Jinan City, Shandong, People's Republic of China
| | - D X Liu
- Department of Medical Psychology and Ethics, Shandong University School of Basic Medical Sciences, Jinan City, Shandong, People's Republic of China
| | - Y Zhang
- Department of Psychiatry, Shandong Mental Health Center, Jinan City, Shandong, People's Republic of China
| | - Z X Liu
- Department of Psychiatry, Shandong Mental Health Center, Jinan City, Shandong, People's Republic of China
| | - Y Lu
- Department of Psychiatry, Shandong Mental Health Center, Jinan City, Shandong, People's Republic of China
| | - J C Jia
- Department of Psychiatry, Shandong Mental Health Center, Jinan City, Shandong, People's Republic of China
| | - J T Liu
- Department of Psychiatry, Shandong University School of Medicine, Jinan City, Shandong, People's Republic of China
| | - F Pan
- Department of Medical Psychology and Ethics, Shandong University School of Basic Medical Sciences, Jinan City, Shandong, People's Republic of China
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Wang XC, Zhao HY, Liu G, Cheng XJ, Feng H. Improving production of extracellular proteases by random mutagenesis and biochemical characterization of a serine protease in Bacillus subtilis S1-4. Genet Mol Res 2016; 15:gmr7831. [PMID: 27323184 DOI: 10.4238/gmr.15027831] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
The feather is a valuable by-product with a huge annual yield produced by the poultry industry. Degradation of feathers by microorganisms is a prerequisite to utilize this insoluble protein resource. To improve the degrading efficiency of feathers, mutagenesis of the bacterium Bacillus subtilis S1-4 was performed. By combining ultraviolet irradiation and N-methyl-N'-nitro-N-nitrosoguanidine treatment for mutagenesis, a high protease-producing mutant (UMU4) of B. subtilis S1-4 was selected, which exhibited 2.5-fold higher extracellular caseinolytic activity than did the wild-type strain. UMU4 degraded chicken feathers more efficiently, particularly for the release of soluble proteins from the feathers, compared to the wild-type strain. Furthermore, an extracellular protease with a molecular weight of 45 kDa, as determined by SDS-PAGE, was purified from UMU4. Biochemical characterization indicated that the caseinolytic activity of the protease was largely inhibited by phenylmethanesulfonyl fluoride, suggesting that the purified enzyme is a serine protease. This protease was highly active over a wide range of pHs (6.0 to 12.0) and temperatures (50° to 75°C) with an optimal pH and temperature of 8.0 and 65°C, respectively. The purified enzyme exhibited good thermostability with a 72.2 min half-life of thermal denaturation at 60°C. In addition, this protease was not sensitive to heavy metal ions, surfactants, or oxidative reagents. In conclusion, strain improvement for protease production can serve as an alternative strategy to promote feather degradation. The UMU4 mutant of B. subtilis and its serine protease could be potentially used in various industries.
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Affiliation(s)
- X C Wang
- Sichuan Key Laboratory of Molecular Biology and Biotechnology, The Key Laboratory for Bio-Resources and the Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, China
| | - H Y Zhao
- Sichuan Key Laboratory of Molecular Biology and Biotechnology, The Key Laboratory for Bio-Resources and the Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, China
| | - G Liu
- Sichuan Key Laboratory of Molecular Biology and Biotechnology, The Key Laboratory for Bio-Resources and the Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, China
| | - X J Cheng
- Sichuan Key Laboratory of Molecular Biology and Biotechnology, The Key Laboratory for Bio-Resources and the Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, China
| | - H Feng
- Sichuan Key Laboratory of Molecular Biology and Biotechnology, The Key Laboratory for Bio-Resources and the Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, China
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Zhang NN, Lu W, Cheng XJ, Liu JY, Zhou YH, Li F. High-powered microwave ablation of larger hepatocellular carcinoma: evaluation of recurrence rate and factors related to recurrence. Clin Radiol 2015. [PMID: 26220125 DOI: 10.1016/j.crad.2015.06.092] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
AIM To evaluate the safety and efficacy of high-powered (80-100 W) percutaneous microwave ablation (MWA) at a frequency of 2450±10 MHz for treating larger hepatocellular carcinoma (HCC) and to predict the risk factors of local recurrence after high-powered MWA. MATERIALS AND METHODS The study was approved by the Institutional Review Board, and informed consent was waived because of the retrospective study design. Forty-five patients with a total of 60 lesions received high-power (80-100 W) MWA at a frequency of 2450±10 MHz through a percutaneous approach that was guided by ultrasound. Of the 60 lesions with a maximum tumour measuring 3-8 cm, 46 lesions were 3-5 cm and 14 were 5-8 cm. The complete ablation rates, local recurrence rates, complications, and short-term survival were analysed. Ten possible risk factors for local recurrence were analysed. RESULTS The complete ablation rates were 82.61% for the first ablation and 100% for the second ablation for 3-5 cm lesions. The complete ablation rates were 64.29% (82.61% versus 64.29%, p=0.037) for the first ablation and 85.71% (100% versus 85.71%, p=0.055) for the second ablation for 5-8 cm lesions. Local recurrence was observed in 11 out of the 45 (24.44%) successfully treated patients. The 1-year and 2-year survival rates were 95.56% (43/45) and 86.67% (39/45), respectively. No procedure-related mortality was observed and no major bleeding, liver rupture, or liver abscesses occurred. Univariate analysis showed that a positive correlation existed between the number of lesions (p=0.022), proximity to the risk area (p=0.001), pre-ablation alpha-fetoprotein (AFP) levels (p=0.025), hepatitis B virus (HBV)-DNA replication (p=0.027) and local recurrence. Multivariate analysis identified HBV-DNA (p=0.031) and proximity to the risk area (p=0.039) as the independent prognosis factors causing postoperative HCC local recurrence. CONCLUSION High-powered MWA of larger hepatocellular carcinomas appears to be a safe and effective treatment. HBV-DNA and proximity to the risk area appear to be independent predictors of local tumour recurrence.
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Affiliation(s)
- N N Zhang
- Tianjin Second People's Hospital, 7 Sudi Road, Tianjin 300192, China; Tianjin Institute of Hepatology, 7 Sudi Road, Tianjin 300192, China
| | - W Lu
- Tianjin Second People's Hospital, 7 Sudi Road, Tianjin 300192, China; Tianjin Institute of Hepatology, 7 Sudi Road, Tianjin 300192, China.
| | - X J Cheng
- Tianjin Second People's Hospital, 7 Sudi Road, Tianjin 300192, China; Tianjin Institute of Hepatology, 7 Sudi Road, Tianjin 300192, China
| | - J Y Liu
- Tianjin Second People's Hospital, 7 Sudi Road, Tianjin 300192, China; Tianjin Institute of Hepatology, 7 Sudi Road, Tianjin 300192, China
| | - Y H Zhou
- Tianjin Second People's Hospital, 7 Sudi Road, Tianjin 300192, China; Tianjin Institute of Hepatology, 7 Sudi Road, Tianjin 300192, China
| | - F Li
- Tianjin Second People's Hospital, 7 Sudi Road, Tianjin 300192, China; Tianjin Institute of Hepatology, 7 Sudi Road, Tianjin 300192, China
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Fu JJ, Han Y, Wang Z, Cheng XJ, Zhou L, Zeng C. ASSA14-03-09 Impaired Dopamine D 1Receptor-mediated Vasorelaxantion of Mesenteric Arteries in Obese Zucker Rats. Heart 2015. [DOI: 10.1136/heartjnl-2014-307109.28] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Feng M, Yang B, Zhuang YJ, Yanagi U, Cheng XJ. A study on indoor environment contaminants related to dust mite in dwellings of allergic asthma patients and of healthy subjects. Biosci Trends 2012; 6:7-9. [PMID: 22426097 DOI: 10.5582/bst.2012.v6.1.7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
This study investigated the pollution of dust mite allergens in the houses of 30 families and their infection to young allergic asthma patients in Shanghai. Medical records, family information, and dust samples were collected from the dwellings of 15 young allergic asthma patients and 15 healthy subjects. Der 1 allergen, which is a common allergen causing allergic asthma, was measured in collected dust samples using the Pharmacia Uni-CAP System. A significant correlation was found between the number of Der 1 allergens collected from floor surfaces and the number of Der 1 allergens collected from bed surfaces. Some factors influencing Der 1 allergen levels were found in this study. Relative humidity in dwellings was found to be most influential to the allergen levels. The findings suggested that traditional reduction methods for coarse particles, such as opening windows and periodic cleaning of beddings, may be effective in removing dust mite allergens.
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Affiliation(s)
- M Feng
- Department of Microbiology and Parasitology, Shanghai Medical College of Fudan University, Shanghai, China
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Ou Q, Li SJ, Cheng XJ. Cerebral sparganosis: A case report. Biosci Trends 2010; 4:145-147. [PMID: 20592465] [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: 05/29/2023]
Abstract
Sparganosis is a rare parasitic infection in humans caused by a larval cestode of the genus Spirometra. Spargana invade muscle, subcutaneous tissue, the eye, urogenital, and abdominal viscera, but the central nervous system (CNS) is not a frequent site of invasion. Here, we describe an 18-year-old patient with cerebral sparganosis and review data from other cases reported in the medical literature.
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Affiliation(s)
- Q Ou
- Department of Microbiology and Parasitology, Shanghai Medical College of Fudan University, China
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Cheng Q, Miao L, Zhang J, Guan YT, Liu ZG, Wang X, Sun XJ, Zhao ZX, Song YJ, Ding XY, Guo ZL, Cheng XJ, Chen SD, Jiang GX, Fredrikson S. Clinical features of patients with multiple sclerosis from a survey in Shanghai, China. Mult Scler 2008; 14:671-8. [PMID: 18424476 DOI: 10.1177/1352458507087844] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Objective To describe clinical features of patients with multiple sclerosis (MS) in Shanghai, China. Methods Prevalent patients with MS were identified and investigated by a network of physicians in 11 districts of Shanghai during the period from 1 September 2004 to 31 August 2005. Admission registries of each hospital in the study area were checked systematically for patients with a diagnosis of MS, neuromyelitis optica or other demyelinating disorders. All patients with collected information were evaluated by four senior neurologists according to the McDonald criteria. Results There were 249 (146 female and 103 male) patients with a confirmed MS diagnosis, at a female-to-male ratio of 1.4. The mean age at onset of MS was 37.4 years for the 249 patients with MS and, on the prevalence day, 42.7 years. The most frequent location of clinical MS lesions in the central nervous system was the spinal cord (61%), followed by the cerebrum (55%) and optic nerves (41%). Nearly all (96%) of the patients with MS had been examined by magnetic resonance imaging, and 226 (94%) patients of those examined were suggestive of MS. No family history of MS was found in any of the patients. Most (86%) of the patients had no or mild disability on the prevalence day (31 December 2004). Almost all (96%) patients with MS had been treated with corticosteroids. Conclusion Clinical features of patients with MS are described based on the information from the largest case series reported among Chinese. Comparisons and discussions are made with findings from the other populations.
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Affiliation(s)
- Q Cheng
- Department of Neurology, Ruijin Hospital, Medical School of Shanghai Jiao Tong University, Shanghai, China; School of Public Health, Shanghai Jiao Tong University, Shanghai, China
| | - L Miao
- Department of Neurology, Renji Hospital, Medical School of Shanghai Jiao Tong University, Shanghai, China
| | - J Zhang
- Department of Neurology, Ruijin Hospital, Medical School of Shanghai Jiao Tong University, Shanghai, China
| | - YT Guan
- Department of Neurology, Changhai Hospital, Second Military Medical University, Shanghai, China
| | - ZG Liu
- Department of Neurology, Xinhua Hospital, Medical School of Shanghai Jiao Tong University, Shanghai, China
| | - X Wang
- Department of Neurology, Zhongshan Hospital, Fudan University, Shanghai, China
| | - XJ Sun
- Department of Neurology, Shanghai No. 6 People’s Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - ZX Zhao
- Department of Neurology, Changzheng Hospital, Second Military Medical University, Shanghai, China
| | - YJ Song
- Department of Neurology, Ruijin Hospital, Medical School of Shanghai Jiao Tong University, Shanghai, China
| | - XY Ding
- Department of Radiology, Ruijin Hospital, Medical School of Shanghai Jiao Tong University, Shanghai, China
| | - ZL Guo
- Department of Neurology, Ruijin Hospital, Medical School of Shanghai Jiao Tong University, Shanghai, China
| | - XJ Cheng
- Department of Neurology, Ruijin Hospital, Medical School of Shanghai Jiao Tong University, Shanghai, China
| | - SD Chen
- Department of Neurology, Ruijin Hospital, Medical School of Shanghai Jiao Tong University, Shanghai, China; Institute of Health Science, Shanghai Institutes of Biological Sciences (SIBS), Chinese Academy of Science (CAS) and Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - GX Jiang
- School of Public Health, Shanghai Jiao Tong University, Shanghai, China; Department of Public Heath Sciences, Karolinska Institute, Stockholm, Sweden
| | - S Fredrikson
- Division of Neurology, Karolinska Institute, Karolinska University Hospital, Stockholm, Sweden
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12
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Li CM, Chen JH, Zhang P, He Q, Yuan J, Chen RJ, Cheng XJ, Tan HZ, Yang Y. Continuous veno-venous haemofiltration attenuates myocardial mitochondrial respiratory chain complexes activity in porcine septic shock. Anaesth Intensive Care 2008; 35:911-9. [PMID: 18084982 DOI: 10.1177/0310057x0703500609] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Increasing evidence indicates that mitochondrial dysfunction plays an important role in modulating the development of septic shock. In the present study, we investigated whether continuous veno-venous haemofiltration (CVVH) with high-volume might improve myocardial mitochondrial dysfunction in a porcine model of peritonitis-induced septic shock. Sixteen male Landrace pigs weighing 31 +/- 5 kg were randomly assigned to normal control group (n = 4), peritonitis group (n = 6) and peritonitis plus CVVH group (n = 6). All animals were anaesthetised and mechanically ventilated. After baseline examinations, the peritonitis group and the peritonitis plus CVVH group underwent induction of peritonitis. One hour later, the animals in the peritonitis plus CVVH group received treatment with high-volume CVVH. Twelve hours after treatment, the animals were sacrificed. Animals in the peritonitis group were killed 13 hours after induction of peritonitis. Peritonitis challenge induced septic shock associated with increased blood lactate and high-volume CVVH improved lactate acidosis. Compared with the peritonitis group, cardiac output, stroke volume and mean arterial pressure were better maintained in peritonitis plus CVVH group. More importantly, high-volume CVVH improved myocardial mitochondrial complex I activity (0.22 +/- 0.03 vs. 0.15 +/- 0.04, P = 0.04). These results suggest that high-volume CVVH improves haemodynamics and heart dysfunction in septic shock and the improvement may be attributed to amelioration of myocardial mitochondrial dysfunction.
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Affiliation(s)
- C M Li
- Animal Laboratory, First Affiliated Hospital, Medical College of Zhejiang University, Hangzhou, China
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13
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14
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Lu GH, Zhao YH, Yang SG, Cheng XJ. Quantitative structure-biodegradability relationships of substituted benzenes and their biodegradability in river water. Bull Environ Contam Toxicol 2002; 69:111-6. [PMID: 12053264 DOI: 10.1007/s00128-002-0016-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Affiliation(s)
- G H Lu
- College of Water Resources and Environment, Hohai University, Nanjing, 210098 People's Republic of China
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15
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Abstract
To determine if genetic diversity of Blastocystis hominis exists in Japan, we monitored 64 B. hominis-infected people: 39 asymptomatic people whose infections were detected during routine medical check-ups (32 Japanese and 7 non-Japanese) and 25 patients with gastrointestinal symptoms who visited the outpatient clinics of St. Luke's International Hospital (19 Japanese and 6 non-Japanese). We detected 6 known and 2 new riboprint patterns in isolates from the infected people. There were no differences in the distribution of ribodemes between isolates from Japanese and non-Japanese people, similar to that in other countries. However, we noted a possible relationship between ribodeme type and pathogenicity. The results suggest that ribodemes I, III, and VI may be responsible for gastrointestinal symptoms.
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Affiliation(s)
- Y Kaneda
- Department of Infectious Diseases, Tokai University School of Medicine, Isehara, Japan
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16
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Cheng XJ, Hughes MA, Huston CD, Loftus B, Gilchrist CA, Lockhart LA, Ghosh S, Miller-Sims V, Mann BJ, Petri WA, Tachibana H. Intermediate subunit of the Gal/GalNAc lectin of Entamoeba histolytica is a member of a gene family containing multiple CXXC sequence motifs. Infect Immun 2001; 69:5892-8. [PMID: 11500468 PMCID: PMC98708 DOI: 10.1128/iai.69.9.5892-5898.2001] [Citation(s) in RCA: 67] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Killing by Entamoeba histolytica requires parasite adherence to host galactose- and N-acetyl-D-galactosamine (Gal/GalNAc)-containing cell surface receptors. A 260-kDa heterodimeric E. histolytica Gal/GalNAc lectin composed of heavy (Hgl) and light (Lgl) subunits has been previously described. Here we present the cloning and characterization of Igl, a 150-kDa intermediate subunit of the Gal/GalNAc lectin. Igl, Hgl, and Lgl colocalized on the surface membrane of trophozoites. Two unlinked copies of genes encoding Igl shared 81% amino acid sequence identity (GenBank accession no. AF337950 and AF337951). They encoded cysteine-rich proteins with amino- and carboxy-terminal hydrophobic signal sequences characteristic of glycosylphosphatidylinositol (GPI)-anchored membrane proteins. The igl genes lacked carbohydrate recognition domains but were members of a large family of amebic genes containing CXXC and CXC motifs. These data indicate that Igl is part of the parasite's multimolecular Gal/GalNAc adhesin required for host interaction.
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Affiliation(s)
- X J Cheng
- Department of Infectious Diseases, Tokai University School of Medicine, Bohseidai, Isehara, Kanagawa 259-1193, Japan
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17
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Cheng XJ, Tachibana H. Protection of hamsters from amebic liver abscess formation by immunization with the 150- and 170-kDa surface antigens of Entamoeba histolytica. Parasitol Res 2001; 87:126-30. [PMID: 11206109 DOI: 10.1007/s004360000323] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
A monoclonal antibody, EH3015, prevents in vitro adherence of Entamoeba histolytica trophozoites to mammalian cells and inhibits amebic liver abscess formation in hamsters. By immunoaffinity chromatography with the monoclonal antibody, purified E. histolytica antigens with molecular masses of 150 and 170 kDa under non-reduced conditions were obtained. Hamsters were immunized with these antigens (group I) or with fractions further purified by polyacrylamide gel electrophoresis (group II). Pooled immune sera from the two groups inhibited in vitro amebic adherence to Chinese hamster ovary cells by 98% at 1:10 dilutions. The immunized hamsters were challenged by the intrahepatic injection of E. histolytica trophozoites. Complete protection from abscess formation was observed in 38% of hamsters in group I and 67% in group II, whereas all control hamsters inoculated only with adjuvant developed amebic liver abscesses. In the immunized hamsters, the abscesses in the two groups were significantly smaller than in the controls. These results demonstrate that the E. histolytica antigens are possible vaccine candidates for amebiasis.
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Affiliation(s)
- X J Cheng
- Department of Infectious Diseases, Tokai University School of Medicine, Isehara, Kanagawa, Japan
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18
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Tachibana H, Cheng XJ, Kobayashi S, Matsubayashi N, Gotoh S, Matsubayashi K. High prevalence of infection with Entamoeba dispar, but not E. histolytica, in captive macaques. Parasitol Res 2001; 87:14-7. [PMID: 11199843 DOI: 10.1007/s004360000289] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
A total of 268 nonhuman primates (20 species) kept in the Primate Research Institute, Kyoto University, Japan, were surveyed for intestinal amebas. Total positive rates as based on the presence of cysts in the stool following formalin-ether sedimentation were as follows: Entamoeba histolytica/E. dispar, 53%; E. coli, 34%; E. hartmanni, 34%; Iodamoeba buetschlii, 25%; Endolimax nana, 8%; and E. chattoni, 3%. Positive rates were higher in Old World monkeys and lower in New World monkeys. All the 141 E. histolytica/E. dispar-positive animals were Macaca monkeys. The E. histolytica/E. dispar-positive samples were analyzed by polymerase chain reaction (PCR) for identification of E. histolytica and E. dispar. E. dispar DNA was detected in 137 samples, whereas no E. histolytica DNA was seen. Zymodeme analysis and reactivity to monoclonal antibodies of cultured trophozoites also supported the presence of E. dispar and the absence of E. histolytica. When the sera of 93 macaques were examined by an indirect fluorescent antibody test, only 3 animals proved to be positive for E. histolytica, showing the lowest titer. These results demonstrate that infection with E. dispar, but not E. histolytica, is predominant in macaques.
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Affiliation(s)
- H Tachibana
- Department of Infectious Diseases, Tokai University School of Medicine, Isehara, Kanagawa, Japan.
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19
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Affiliation(s)
- L Yu
- Dept. of Kidney Transplant, Nanfang Hospital, Guangzhou, People's Republic of China
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20
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Cheng XJ, Ihara S, Takekoshi M, Tachibana H. Entamoeba histolytica: bacterial expression of a human monoclonal antibody which inhibits in vitro adherence of trophozoites. Exp Parasitol 2000; 96:52-6. [PMID: 11038321 DOI: 10.1006/expr.2000.4546] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- X J Cheng
- Department of Infectious Diseases, Tokai University School of Medicine, Isehara, Kanagawa, Japan
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21
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Affiliation(s)
- X J Cheng
- Department of Infectious Diseases, Tokai University School of Medicine, Isehara, Kanagawa, Japan
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22
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Abstract
Chimpanzees (Pan troglodytes) residing in the Kumamoto Primate Research Park, Sanwa Kagaku Kenkyusho, were surveyed for the presence of intestinal parasites. Stool samples from 107 chimpanzees were examined by microscopy after formalin-ether sedimentation. Of these animals, 100 were infected with at least 1 species of ameba. The positivity rates recorded were as follows: Entamoeba coli, 88%; E. histolytica/E. dispar, 48%; E. hartmanni, 15%; Iodamoeba buetschlii, 8%; Endolimax nana, 4%; and Entamoeba chattoni, 2%. Polymerase chain reaction (PCR) analysis to distinguish between E. histolytica and E. dispar was performed on these samples. E. dispar DNA was detected in 60 of 107 samples (56%), including 9 that had been microscopically determined to be negative for E. histolytica/ E. dispar. In contrast, no E. histolytica DNA was detected in the 107 samples. Zymodeme analysis indicated that 10 isolates were E. dispar. When 104 chimpanzees were examined serologically for E. histolytica infection, 1 sample was scored as positive by indirect hemagglutination and another was found to be positive by an indirect fluorescent antibody test. However, both specimens were borderline-positive and were clearly negative in other tests, suggesting that they might be false-positives. These results demonstrate that the pathogenic E. histolytica was absent in this colony, regardless of the high degree of prevalence of other amebas. For an accurate diagnosis, PCR analysis is recommended in addition to microscopic examination.
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Affiliation(s)
- H Tachibana
- Department of Infectious Diseases, Tokai University School of Medicine, Bohseidai, Isehara, Japan.
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23
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Affiliation(s)
- H Tachibana
- Department of Infectious Diseases, Tokai University School of Medicine, Isehara, Kanagawa, 259-1193, Japan.
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24
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Tachibana H, Cheng XJ, Watanabe K, Takekoshi M, Maeda F, Aotsuka S, Kaneda Y, Takeuchi T, Ihara S. Preparation of recombinant human monoclonal antibody Fab fragments specific for Entamoeba histolytica. Clin Diagn Lab Immunol 1999; 6:383-7. [PMID: 10225840 PMCID: PMC103727 DOI: 10.1128/cdli.6.3.383-387.1999] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Genes coding for human antibody Fab fragments specific for Entamoeba histolytica were cloned and expressed in Escherichia coli. Lymphocytes were separated from the peripheral blood of a patient with an amebic liver abscess. Poly(A)+ RNA was isolated from the lymphocytes, and then genes coding for the light chain and Fd region of the heavy chain were amplified by a reverse transcriptase PCR. The amplified DNA fragments were ligated with a plasmid vector and were introduced into Escherichia coli. Three thousand colonies were screened for the production of antibodies to E. histolytica HM-1:IMSS by an indirect fluorescence-antibody (IFA) test. Lysates from five Escherichia coli clones were positive. Analysis of the DNA sequences of the five clones showed that three of the five heavy-chain sequences and four of the five light-chain sequences differed from each other. When the reactivities of the Escherichia coli lysates to nine reference strains of E. histolytica were examined by the IFA test, three Fab fragments with different DNA sequences were found to react with all nine strains and another Fab fragment was found to react with seven strains. None of the four human monoclonal antibody Fab fragments reacted with Entamoeba dispar reference strains or with other enteric protozoan parasites. These results indicate that the bacterial expression system reported here is effective for the production of human monoclonal antibodies specific for E. histolytica. The recombinant human monoclonal antibody Fab fragments may be applicable for distinguishing E. histolytica from E. dispar and for use in the serodiagnosis of amebiasis.
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Affiliation(s)
- H Tachibana
- Departments of Infectious Diseases, Tokai University School of Medicine, Isehara, Kanagawa 259-1193, Japan.
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25
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Tachibana H, Takekoshi M, Cheng XJ, Maeda F, Aotsuka S, Ihara S. Bacterial expression of a neutralizing mouse monoclonal antibody Fab fragment to a 150-kilodalton surface antigen of Entamoeba histolytica. Am J Trop Med Hyg 1999; 60:35-40. [PMID: 9988319 DOI: 10.4269/ajtmh.1999.60.1.9988319] [Citation(s) in RCA: 13] [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: 11/07/2022] Open
Abstract
A mouse monoclonal antibody (MAb) (EH3015, IgG1 with a K light chain) prepared by hybridoma technology recognizes a 150-kD surface antigen of Entamoeba histolytica and inhibits adherence and cytotoxicity of the ameba to mammalian cells. The genes encoding the light chain and the Fd region of the heavy chain of the MAb were cloned and expressed in Escherichia coli. The plasmid used was designed for the expression of Fab with a hexa-histidine tag in the periplasmic space. Recombinant Fab fragments were purified and analyzed by an indirect immunofluorescence antibody test and Western immunoblot. The specificity of the recombinant Fab fragment was comparable with the parent whole IgG. In addition, the Fab fragments significantly inhibited the adherence of E. histolytica to erythrocytes. These results suggest that the production of a neutralizing MAb in Escherichia coli is practical and efficient with this expression system.
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MESH Headings
- Amino Acid Sequence
- Animals
- Antibodies, Monoclonal/biosynthesis
- Antibodies, Monoclonal/chemistry
- Antibodies, Monoclonal/genetics
- Antibodies, Monoclonal/immunology
- Antibodies, Protozoan/biosynthesis
- Antibodies, Protozoan/chemistry
- Antibodies, Protozoan/genetics
- Antibodies, Protozoan/immunology
- Antigens, Protozoan/immunology
- Antigens, Surface/immunology
- Base Sequence
- Blotting, Western
- Cell Adhesion/immunology
- Cloning, Molecular
- DNA, Complementary/chemistry
- Electrophoresis, Polyacrylamide Gel
- Entamoeba histolytica/immunology
- Escherichia coli/genetics
- Fluorescent Antibody Technique, Indirect
- Gene Expression Regulation, Bacterial
- Hybridomas
- Immunoglobulin Fab Fragments/biosynthesis
- Immunoglobulin Fab Fragments/chemistry
- Immunoglobulin Fab Fragments/genetics
- Immunoglobulin Fab Fragments/immunology
- Immunoglobulin Heavy Chains/biosynthesis
- Immunoglobulin Heavy Chains/chemistry
- Immunoglobulin Heavy Chains/genetics
- Immunoglobulin Heavy Chains/immunology
- Immunoglobulin kappa-Chains/biosynthesis
- Immunoglobulin kappa-Chains/chemistry
- Immunoglobulin kappa-Chains/genetics
- Immunoglobulin kappa-Chains/immunology
- Mice
- Molecular Sequence Data
- RNA, Messenger/genetics
- Sequence Homology, Nucleic Acid
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Affiliation(s)
- H Tachibana
- Department of Infectious Diseases, Tokai University School of Medicine, Isehara, Kanagawa, Japan
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26
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Cheng XJ, Tachibana H, Kaneda Y. Protection of hamsters from amebic liver abscess formation by a monoclonal antibody to a 150-kDa surface lectin of Entamoeba histolytica. Parasitol Res 1999; 85:78-80. [PMID: 9950232 DOI: 10.1007/s004360050510] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We examined the effects of passive immunization with a monoclonal antibody (EH3015) that recognizes a 150-kDa surface lectin of Entamoeba histolytica on amebic liver-abscess formation in hamsters. The hamsters were inoculated i.p with 0.1, 1.0, or 10 mg of EH3015 at 24 h prior to an intrahepatic challenge with 10(5) trophozoites of E. histolytica. In hamsters treated with 1.0 and 10 mg of EH3015 the incidence of liver abscesses was significantly reduced. These results demonstrate that monoclonal antibody EH3015 can prevent the development of amebic liver abscesses and that the 150-kDa lectin may be a protective antigen on the surface of E. histolytica.
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Affiliation(s)
- X J Cheng
- Department of Infectious Diseases, Tokai University School of Medicine, Isehara, Kanagawa, Japan
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27
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Cheng XJ, Tsukamoto H, Kaneda Y, Tachibana H. Identification of the 150-kDa surface antigen of Entamoeba histolytica as a galactose- and N-acetyl-D-galactosamine-inhibitable lectin. Parasitol Res 1998; 84:632-9. [PMID: 9747935 DOI: 10.1007/s004360050462] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
A monoclonal antibody that reacts with a 150-kDa protein of Entamoeba histolytica on Western immunoblotting under nonreducing conditions inhibits the adherence and cytotoxicity of the ameba to mammalian cells in vitro. Affinity purification of solubilized trophozoites using the monoclonal antibody and electrophoresis yielded three glycoproteins with molecular masses of 150, 170, and 260 kDa, suggesting the existence of either a common epitope or the close association of these proteins. The 260-kDa fraction was identified as the well-known galactose (Gal)- and N-acetyl-D-galactosamine (GalNAc)-inhibitable lectin. The 150- and 170-kDa fractions seemed to exist as part of a 380-kDa native protein with an isoelectric point of pH 6.9. The N-terminal amino acid sequence of the 150-kDa protein was unique, indicating that the protein was not a degraded product of the 260-kDa lectin. By gel filtration, the 260-kDa lectin and the 150/170-kDa protein could be separated. When Chinese hamster ovary cells were pretreated with the fraction consisting of the 150/170-kDa protein the adherence of trophozoites to Chinese hamster ovary cells was competitively inhibited to a level equivalent to that observed for the 260-kDa lectin. The inhibitory effect was lost in the presence of Gal and GalNAc but was not influenced by the presence of glucose. These results demonstrate that the 150/170-kDa protein is a Gal/GalNAc-inhibitable lectin. The existence of a sugar-binding domain in the protein was confirmed by Gal-affinity chromatography.
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MESH Headings
- Acetylgalactosamine/pharmacology
- Amino Acid Sequence
- Animals
- Antigens, Protozoan/chemistry
- Antigens, Protozoan/immunology
- Antigens, Protozoan/isolation & purification
- Antigens, Protozoan/pharmacology
- Antigens, Surface/analysis
- Antigens, Surface/chemistry
- Antigens, Surface/isolation & purification
- Blotting, Western
- CHO Cells
- Cell Adhesion
- Chromatography, Affinity
- Chromatography, Gel
- Cricetinae
- Electrophoresis, Polyacrylamide Gel
- Entamoeba histolytica/immunology
- Entamoeba histolytica/physiology
- Galactose/pharmacology
- Lectins/chemistry
- Lectins/immunology
- Lectins/isolation & purification
- Lectins/pharmacology
- Membrane Glycoproteins/analysis
- Membrane Glycoproteins/chemistry
- Molecular Weight
- Protozoan Proteins/analysis
- Protozoan Proteins/chemistry
- Protozoan Proteins/immunology
- Protozoan Proteins/isolation & purification
- Protozoan Proteins/pharmacology
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Affiliation(s)
- X J Cheng
- Department of Infectious Diseases, Tokai University School of Medicine, Isehara, Kanagawa, Japan
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28
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Cheng XJ, Höög JO, Nairn AC, Greengard P, Aperia A. Regulation of rat Na(+)-K(+)-ATPase activity by PKC is modulated by state of phosphorylation of Ser-943 by PKA. Am J Physiol 1997; 273:C1981-6. [PMID: 9435504 DOI: 10.1152/ajpcell.1997.273.6.c1981] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
We have previously shown that the rat Na(+)-K(+)-ATPase alpha 1-isoform is phosphorylated at Ser-943 by protein kinase A (PKA) and at Ser-23 by protein kinase C (PKC), which in both cases results in inhibition of enzyme activity. We now present evidence that suggests that the phosphorylation of Ser-943 by PKA modulates the response of Na(+)-K(+)-ATPase to PKC. Rat Na(+)-K(+)-ATPase alpha 1 or a mutant in which Ser-943 was changed to Ala-943 was stably expressed in COS cells. The inhibition of enzyme activity measured in response to treatment with the phorbol ester, phorbol 12,13-dibutyrate (PDBu; 10(-6) M), was significantly reduced in the cells expressing the Ala-943 mutant compared with that observed in cells expressing wild-type enzyme. In contrast, for cells expressing Na(+)-K(+)-ATPase alpha 1 in which Ser-943 was mutated to Asp-943, the effect of PDBu was slightly enhanced. The PDBu-induced inhibition was not mediated by activation of the adenosine 3',5'-cyclic monophosphate/PKA system and was not achieved via direct phosphorylation of Ser-943. Sp-5,6-DCI-cBIMPS, a specific PKA activator, increased the phosphorylation of Ser-943, and this was associated with an enhanced response to PDBu. Thus the effect of PKC on rat Na(+)-K(+)-ATPase alpha 1 is determined not only by the activity of PKC but also by the state of phosphorylation of Ser-943.
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Affiliation(s)
- X J Cheng
- Department of Woman and Child Health, Karolinska Institute, Stockholm, Sweden
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29
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Cheng XJ, Fisone G, Aizman O, Aizman R, Levenson R, Greengard P, Aperia A. PKA-mediated phosphorylation and inhibition of Na(+)-K(+)-ATPase in response to beta-adrenergic hormone. Am J Physiol 1997; 273:C893-901. [PMID: 9316410 DOI: 10.1152/ajpcell.1997.273.3.c893] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The activity of Na(+)-K(+)-ATPase can be regulated by hormones that activate adenosine 3',5'-cyclic monophosphate-dependent protein kinase (PKA). Here, using a site-directed phosphorylation state-specific antibody, we show that hormonal regulation of Na(+)-K(+)-ATPase can occur via phosphorylation of Ser-943 on its alpha-subunit. cDNAs coding for wild-type rat Na(+)-K(+)-ATPase and Na(+)-K(+)-ATPase in which the PKA phosphorylation site Ser-943 was mutated to Ala were stably and transiently transfected into COS cells. In COS cells expressing wild-type Na(+)-K(+)-ATPase the beta-adrenergic agonist isoproterenol (1 microM) significantly increased the level of phosphorylation of the alpha-subunit. Phosphorylation was accompanied by a significant inhibition of the enzyme activity, as reflected by a decrease in ATP hydrolysis and 86Rb+ transport. The effect of isoproterenol was reproduced by the PKA activator forskolin used in combination with the phosphodiesterase inhibitor 3-isobutyl-1-methylxanthine and was abolished by the specific PKA inhibitor H-89. Okadaic acid, an inhibitor of protein phosphatases 1 and 2A, enhanced phosphorylation and inhibition of Na(+)-K(+)-ATPase induced by isoproterenol. The changes in activity of Na(+)-K(+)-ATPase linearly correlated with the extent of the alpha-subunit of Na(+)-K(+)-ATPase being phosphorylated. When Ser-943 was replaced by alanine, stimulation of the phosphorylation and inhibition of the activity of Na(+)-K(+)-ATPase induced by isoproterenol, alone or in combination with okadaic acid, were not observed. These results indicate that, in intact cells, modulation of the activity of Na(+)-K(+)-ATPase can be achieved by regulation of the state of phosphorylation of Ser-943. Moreover, they provide a biochemical mechanism by which beta-adrenergic agonists can regulate Na(+)-K(+)-ATPase activity.
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Affiliation(s)
- X J Cheng
- Department of Woman and Child Health, St. Göran's Children's Hospital, Karolinska Institute, Stockholm, Sweden
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30
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Nowicki S, Chen SL, Aizman O, Cheng XJ, Li D, Nowicki C, Nairn A, Greengard P, Aperia A. 20-Hydroxyeicosa-tetraenoic acid (20 HETE) activates protein kinase C. Role in regulation of rat renal Na+,K+-ATPase. J Clin Invest 1997; 99:1224-30. [PMID: 9077530 PMCID: PMC507936 DOI: 10.1172/jci119279] [Citation(s) in RCA: 130] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
It is well documented that the activity of Na+,K+-ATPase can be inhibited by the arachidonic acid metabolite, 20-hydroxyeicosa-tetraenoic acid (20 HETE). Evidence is presented here that this effect is mediated by protein kinase C (PKC). PKC inhibitors abolished 20 HETE inhibition of rat Na+,K+-ATPase in renal tubular cells. 20 HETE caused translocation of PKC alpha from cytoplasm to membrane in COS cells. It also inhibited Na+,K+-ATPase activity in COS cells transfected with rat wild-type renal Na+,K+-ATPase alpha1 subunit, but not in cells transfected with Na+,K+-ATPase alpha1, where the PKC phosphorylation site, serine 23, had been mutated to alanine. PKC-induced phosphorylation of rat renal Na+,K+-ATPase, as well as of histone was strongly enhanced by 20 HETE at the physiologic calcium concentration of 1.3 microM, but not at the calcium concentration of 200 microM. The results indicate that phospholipase A2-arachidonic acid-20 HETE pathway can exert important biological effects via activation of PKC and that this effect may occur in the absence of a rise in intracellular calcium.
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Affiliation(s)
- S Nowicki
- Department of Women and Child Health, Karolinska Institute, Stockholm, Sweden
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31
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Tachibana H, Kobayashi S, Cheng XJ, Hiwatashi E. Differentiation of Entamoeba histolytica from E. dispar facilitated by monoclonal antibodies against a 150-kDa surface antigen. Parasitol Res 1997; 83:435-9. [PMID: 9197389 DOI: 10.1007/s004360050276] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Murine monoclonal antibodies (mAbs) were produced against an n-octyl-beta-D-glucopyranoside-extracted fraction of trophozoites of Entamoeba histolytica HM-1:IMSS. Four of the mAbs were reactive with a 150-kDa surface antigen characterized by Western-immunoblot analysis under nonreducing conditions. When the reactivity of the four mAbs with nine reference strains of E. histolytica was examined by an indirect fluorescence antibody test, two of the mAbs (EH3015 and EH3023) were found to react with all nine strains and the other two mAbs (EH3056 and EH3126) reacted with seven strains. The four mAbs did not react with any E. dispar reference strain or with other enteric protozoan parasites. The reactivity of EH3015 and EH3023 with numerous isolates of E. histolytica and E. dispar collected in our laboratories was also examined. The 2 mAbs reacted with all of the 37 E. histolytica isolates tested but did not react with any of the 33 isolates of E. dispar. These results indicate that common antigenic epitopes of E. histolytica are on the 150-kDa surface molecule and that mAbs can distinguish between E. histolytica and E. dispar.
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Affiliation(s)
- H Tachibana
- Department of Infectious Diseases, Tokai University School of Medicine, Isehara, Japan.
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32
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Aperia A, Fryckstedt J, Holtbäck U, Belusa R, Cheng XJ, Eklöf AC, Li D, Wang ZM, Ohtomo Y. Cellular mechanisms for bi-directional regulation of tubular sodium reabsorption. Kidney Int 1996; 49:1743-7. [PMID: 8743489 DOI: 10.1038/ki.1996.259] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
The molecular mechanisms underlying the regulation of sodium excretion are incompletely known. Here we propose a general model for a bi-directional control of tubular sodium transporters by natriuretic and antinatriuretic factors. The model is based on experimental data from studies on the regulation of the activity of Na+,K+-ATPase, the enzyme that provides the electrochemical gradient necessary for tubular reabsorption of electrolytes and solutes in all tubular segments. Regulation is carried out to a large extent by autocrine and paracrine factors. Of particular interest are the two catecholamines, dopamine and norepinephrine. Dopamine is produced in proximal tubular cells and inhibits Na+,K+-ATPase activity in several tubule segments. Renal dopamine availability is regulated by the degrading enzyme, catechol-O-methyl transferase. Renal sympathetic nerve endings contain norepinephrine and neuropeptide Y (NPY). Activation of alpha-adrenergic receptors increase and activation of beta-adrenergic receptors decrease Na+,K+-ATPase activity. alpha-Adrenergic stimulation increases the Na+ affinity of the enzyme and thereby the driving force for transcellular Na+ transport. NPY acts as a master hormone by synergizing the alpha- and antagonizing the beta-adrenergic effects. Dopamine and norepinephrine control Na+,K+-ATPase activity by exerting opposing forces on a common intracellular signaling system of second messengers, protein kinases and protein phosphatases, ultimately determining the phosphorylation state of Na+,K+-ATPase and thereby its activity. Important crossroads in this network are localized and functionally defined. Phosphorylation sites for protein kinase A and C have been identified and their functional significance has been verified.
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Affiliation(s)
- A Aperia
- Department of Woman And Child Health, St. Göran's Children's Hospital, Karolinska Institute, Stockholm, Sweden
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33
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Cheng XJ, Jin W, Huang XQ. [Quantitative measurement of mental symptoms in breast patients after mastectomy]. Zhonghua Hu Li Za Zhi 1995; 30:486-7. [PMID: 8631117] [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: 02/01/2023]
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34
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Abstract
Angelman syndrome (AS) results from a lack of maternal contribution from chromosome 15q11-13, arising from de novo deletion in most cases or rarely from uniparental disomy. These families are associated with a low recurrence risk. However, in a minority of families, more than one child is affected. No deletion has been found in these families, except one. The mode of inheritance in these families is autosomal dominant modified by imprinting. Sporadic cases, with no observable deletion, therefore pose a counselling dilemma as there could be a recurrence risk as high as 50%. We present a series of 93 AS patients, showing the relative contribution of these different genetic mechanisms. Eighty-one AS patients were sporadic cases while 12 cases came from six families. Sixty cases had deletions in 15q11-13 detected by a set of highly polymorphic (CA)n repeats markers and conventional RFLPs. Ten sporadic cases plus all 12 familial cases had no detectable deletion. In addition, two cases of de novo deletions occurred in a chromosome 15 carrying a pericentric inversion. In one of these the AS child had a cousin with Prader-Willi syndrome (PWS) arising from a de novo deletion in an inv(15) inherited from his father. One case arose from a maternal balanced t(9;15)(p24;q15) translocation. There were three cases of uniparental disomy. Five patients were monoallelic for all loci across the minimal AS critical region, but the presence of a deletion cannot be confirmed. In familial cases, all affected sibs inherited the same maternal chromosome 15 markers for the region 15q11-13. Two cases were observed with a de novo deletion starting close to the locus D15S11 (IR4-2R), providing evidence for the development of classical AS with smaller deletions. Cytogenetic analysis proved limited in its ability to detect deletions, detecting only 42 out of 60 cases. However, cytogenetic analysis is still essential to detect chromosomal abnormalities other than deletions such as inversions and balanced translocations since both have an increased risk for deletions. A staged diagnostic strategy based on the use of highly informative (CA)n repeat markers is proposed.
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Affiliation(s)
- C T Chan
- Unit of Molecular Genetics, Institute of Child Health, London, UK
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35
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Luo YM, Cheng XJ, Yuan WX. Effects of ginseng root saponins and ginsenoside Rb1 on immunity in cold water swim stress mice and rats. Zhongguo Yao Li Xue Bao 1993; 14:401-4. [PMID: 8010026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
The proliferation of splenic lymphocytes, the humoral immune response to sheep red blood cells, and the phagocytotic function of intraperitoneal macrophages were all suppressed by cold water (4 degrees C) swim stress (CWSS) for 5 min in rats and for 3 min in mice. Meanwhile, the levels of serum corticosterone increased. Ginseng root saponins 100 mg.kg-1 or ginsenoside Rb1 10 mg.kg-1 ip or ig completely antagonized the immunosuppression induced by CWSS, and inhibited the increase of serum corticosterone in CWSS rats, but increased the level of serum corticosterone further in CWSS mice.
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Affiliation(s)
- Y M Luo
- Department of Pharmacology, Shenyang College of Pharmacy, China
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36
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Cheng XJ, Di L, Wu Y, Zhao QC, Du GZ, Liu YQ. [Studies on the hypoglycemic effect of Rhodiola sachalinensis A. Bor. polysaccharides]. Zhongguo Zhong Yao Za Zhi 1993; 18:557-9, 575. [PMID: 8011113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Rhodiola sachalinensis polysaccharides (RSP) isolated from the root of Rhodiola sachalinensis was demonstrated to decrease the levels of blood sugar, liver glycogen and total blood lipid when injected peritoneally to mice at 50, 100 and 200 mg/kg once or for 7 successive days. In addition, RSP was found to decrease blood sugar and total blood lipid in various experimental hyperglycemias induced by injection of adrenaline, glucose and alloxan in mice. RSP exhibit inhibiting effect on the glycogen enhancement induced by glucose as well as strenghtening effect on the glycogen decomposition induced by adrenaline and alloxan.
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Affiliation(s)
- X J Cheng
- Academy of Traditional Chinese Medicine and Materia Medica of Jilin Province, Changchun
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37
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Affiliation(s)
- X J Cheng
- Department of Infectious Diseases, Tokai University School of Medicine, Kanagawa, Japan
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Clayton-Smith J, Webb T, Cheng XJ, Pembrey ME, Malcolm S. Duplication of chromosome 15 in the region 15q11-13 in a patient with developmental delay and ataxia with similarities to Angelman syndrome. J Med Genet 1993; 30:529-31. [PMID: 8326502 PMCID: PMC1016435 DOI: 10.1136/jmg.30.6.529] [Citation(s) in RCA: 57] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Duplications of the proximal long arm of chromosome 15 have been seen in the Prader-Willi syndrome (PWS), and in subjects without the Prader-Willi phenotype but with other clinical features including short stature, diabetes, anal and jejunal atresia, and acanthosis nigricans. The non-PWS subjects all had different phenotypes despite the identical findings on cytogenetic analysis. A normal phenotype has also been observed in patients with similar duplications. We report a further patient with a duplication of 15q11-13 which was detected cytogenetically and confirmed on molecular genetic analysis. She has developmental delay, particularly concerning the acquisition of speech, and an ataxic gait. These are interesting clinical features in view of the association of Angelman syndrome with abnormalities of 15q11-13.
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Affiliation(s)
- J Clayton-Smith
- Department of Medical Genetics, St Mary's Hospital, Whitfield Park, Manchester, UK
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Webb T, Clayton-Smith J, Cheng XJ, Knoll JH, Lalande M, Pembrey ME, Malcolm S. Angelman syndrome with a chromosomal inversion 15 inv(p11q13) accompanied by a deletion in 15q11q13. J Med Genet 1993; 29:921-4. [PMID: 1362225 PMCID: PMC1016215 DOI: 10.1136/jmg.29.12.921] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
A family is described in which an inversion of chromosome 15, 15 inv(p11q13), is segregating. All family members are healthy except the proband who is a 10 year old boy with Angelman syndrome. Although the chromosomal inversion has been passed from the grandfather to both his son and his daughter with no ill effect, passage from daughter to grandson has resulted in a deletion of chromosome 15 material which is presumed to be the cause of Angelman syndrome in this boy. The probabilities of an inversion of this type being instrumental in causing the syndrome are discussed.
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Affiliation(s)
- T Webb
- Department of Clinical Genetics, University of Birmingham, Birmingham Maternity Hospital, Edgbaston
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40
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Cheng XJ, Huang MY, Mirelman D. Effect of hamster liver passage on the isoenzyme patterns of Entamoeba histolytica. Chin Med J (Engl) 1992; 105:918-22. [PMID: 1304461] [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: 12/26/2022] Open
Abstract
The effect of hamster liver passage on the isoenzyme patterns of isolates of Entamoeba histolytica was investigated. Three isolates, F, G and T were originally obtained from patients with acute amebic dysentery and another strain, C, was obtained from an asymptomatic carrier. All these strains were maintained for over two years in axenic culture. The isoenzyme pattern (zymodeme) of hexokinase (HK), phosphoglucomutase (PGM) and glucose phosphoisomerase (GPI) of these strains was found to belong to non-pathogenic group X, but the isoenzyme pattern of GPI resembled less pathogenic zymodeme XX and might be an intermediate type. Following inoculation of trophozoites into hamster livers and recovery after abscess formation, their isoenzyme pattern changed and revealed that they belonged to pathogenic type XIV. Liver passage caused an enhancement in amebic virulence as evidenced by their increased ability to destroy leukocytes. The results indicate that isoenzyme pattern is not a stable property of E. histolytica.
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Affiliation(s)
- X J Cheng
- Department of Parasitology, Shanghai Medical University
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41
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Clayton-Smith J, Webb T, Robb SA, Dijkstra I, Willems P, Lam S, Cheng XJ, Pembrey ME, Malcolm S. Further evidence for dominant inheritance at the chromosome 15q11-13 locus in familial angelman syndrome. ACTA ACUST UNITED AC 1992; 44:256-60. [PMID: 1360768 DOI: 10.1002/ajmg.1320440236] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Eleven patients with Angelman syndrome (AS) and their parents from 5 families have been studied with high resolution chromosome analysis and molecular probes from region 15q11-13 in an attempt to elucidate the mode of inheritance in familial AS. No deletions were detected. All families were informative with a combination of different short arm cytogenetic markers. All sets of sibs inherited the same maternal chromosome 15, but in 3 families sibs inherited different paternal 15s. Analysis of 6 polymorphic DNA markers supported the conclusion that AS sibs inherit the same maternal 15, but often different paternal 15s. These data make autosomal recessive inheritance at a 15q11-13 locus very unlikely and support the hypothesis that familial AS is due to maternal transmission of a mutation within 15q11-13.
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Affiliation(s)
- J Clayton-Smith
- Department of Medical Genetics, St. Mary's Hosptial, Manchester, England
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42
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Cheng XJ, Wang YQ. Study on immunopathogenesis of minimal change nephropathy. Effects of mitogens activated lymphocytes on glomerular polyanions in vitro. Chin Med J (Engl) 1989; 102:524-8. [PMID: 2517068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Rat spleen lymphocytes (RSL) stimulated by mitogens in vitro were cultured on cryostat sections of rat kidney. After 36 hours glomerular polyanions (GPA) were stained with colloidal iron (CI). The results showed that the RSL stimulated with Con A were able to reduce GPA stainability as that treated with neuraminidase solution, and the effect was dose-dependent on Con A, whereas the supernatant of lymphocytes induced with Con A and the lymphocytes induced with PHA were not able to reduce GPA stainability. The result is in favor of the recent concept that the pathogenesis of MCN is associated with the loss of GPA which results from the dysfunction of the subpopulation of T lymphocytes.
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43
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Hu LS, Sun Y, Cheng XJ, Zhao SX. Acceleration of fracture healing by a series of Hu's traditional Chinese medicine prescriptions, sanqihuoxuewan, jiegudan and zhuangjinxugudan. J TRADIT CHIN MED 1988; 8:243-6. [PMID: 3246883] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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44
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Cheng XJ, Wang YQ. [Effects of mitogen-activated lymphocytes on glomerular polyanion (GPA) in rats]. Zhonghua Yi Xue Za Zhi 1988; 68:691-2, 48. [PMID: 3248251] [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: 01/04/2023]
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45
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Lu G, Cheng XJ, Yuan WX. [Protective action of ginseng root saponins on hypobaric hypoxic animals]. Zhongguo Yao Li Xue Bao 1988; 9:391-4. [PMID: 3218530] [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: 01/04/2023]
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46
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Zuo DL, Xu JZ, Chen XJ, Fu Y, Cheng XJ. [Surgical treatment of the second primary lung cancer]. Zhonghua Zhong Liu Za Zhi 1988; 10:42-4. [PMID: 2843334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
1168 patients with primary carcinoma of lung had been treated by surgery in our hospital from 1976 to 1985. Among these patients we found 7 patients with second primary lung cancer. The incidence is 0.6% in this series. The criteria of the second primary lung cancer are: different histological type; synchronous lesion located in the contralateral lung or in different lobes or segments of the ipsilateral lung which must all be stage I; or prolonged interval between the initial and second resection (metachronous lesions), but the initial lesion must be proved as stage I. Lobectomy was the most common procedure for the initial and second resections. The result of the treatment was satisfactory with one patients surviving 6 years and 6 months. There was no operative mortality or complications. We consider that careful diagnosis is important and continued follow-up is necessary for all bronchogenic carcinomas.
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Affiliation(s)
- D L Zuo
- Beijing Pulmonary Tumor Institute
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47
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Cheng XJ, Liu YL, Deng YS, Lin GF, Luo XT. [Effects of ginseng root saponins on central transmitters and plasma corticosterone in cold stress mice and rats]. Zhongguo Yao Li Xue Bao 1987; 8:486-9. [PMID: 2897755] [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: 01/03/2023]
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48
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Cheng XJ, Zhang JT. [Effects of three cerebral vasodilators--nimodipine, nifedipine and vincamine on chemically-induced amnesia in rodents]. Yao Xue Xue Bao 1986; 21:731-5. [PMID: 3577770] [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: 01/06/2023]
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49
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Cheng XJ, Liu YL, Lin GF, Luo XT. [Effects of ginseng root saponins on central transmitters and plasma corticosterone in warm-stress rats]. Zhongguo Yao Li Xue Bao 1986; 7:6-8. [PMID: 2876580] [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: 01/03/2023]
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50
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Cheng XJ, Liu AJ, Wang BX. [Studies on the anti-ulcer action of four polysaccharides]. Yao Xue Xue Bao 1985; 20:571-6. [PMID: 3938593] [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: 01/08/2023]
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