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Wu ZX, Wang JH, Zhou CC. [Progress and prospects of liquid-liquid phase separation in developmental diseases]. Zhonghua Kou Qiang Yi Xue Za Zhi 2024; 59:191-196. [PMID: 38280740 DOI: 10.3760/cma.j.cn112144-20230718-00021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 01/29/2024]
Abstract
Membrane-bound organelles as well as membrane-free compartments exist in eukaryotic cells, which divide the nucleus and cytoplasm into distinct subregions and allow specific biochemical reactions to occur. The physiological mechanisms of membrane-bound organelles have been extensively characterized, but the formation and function of membrane-free compartments have not been thoroughly studied. Over the past decade, significant progress had been made in the studies about the role of liquid-liquid phase separation (LLPS) in the formation of membrane-free organelles. LLPS which serves as an aggregated separation mechanism for cellular biochemical reactions, is associated with a variety of physiological processes such as signal transduction and gene transcriptional regulation; while aberrant LLPS may contribute to the occurrence of developmental diseases. The present review investigates the role of LLPS as a mechanism of aggregation and segregation of cellular biochemical responses. The mechanisms of LLPS development and recent advances in the relationships between aberrant LLPS and developmental diseases are forward discussed, as well as how these advances may aid in the development of LLPS-based therapies.
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Affiliation(s)
- Z X Wu
- Department of Pediatric Dentistry, West China Hospital of Stomatology, Sichuan University & State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases, Chengdu 610041, China
| | - J H Wang
- Department of Pediatric Dentistry, West China Hospital of Stomatology, Sichuan University & State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases, Chengdu 610041, China
| | - C C Zhou
- Department of Pediatric Dentistry, West China Hospital of Stomatology, Sichuan University & State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases, Chengdu 610041, China
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Li SY, Xie XY, Liu D, Cheng GR, Hu FF, Zeng DY, Chen XC, Jia LF, Wang YJ, Bu XL, Qiu C, Gao F, Gu JG, Liu MF, Li Y, Zhou YL, Chang HJ, Ou YM, Xu L, Wu ZX, Zhang JJ, Wang JY, Huang LY, Cui YY, Zhou J, Liu XC, Liu J, Nie QQ, Song D, Cai C, Han GB, Yang X, Tan W, Yu JT, Zeng Y. China Initiative for Multi-Domain Intervention (CHINA-IN-MUDI) to Prevent Cognitive Decline: Study Design and Progress. J Prev Alzheimers Dis 2024; 11:589-600. [PMID: 38706275 DOI: 10.14283/jpad.2024.63] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/07/2024]
Abstract
BACKGROUND Alzheimer's disease (AD), the most common type of irreversible dementia, is predicted to affect 152 million people by 2050. Evidence from large-scale preventive randomized controlled trials (RCTs) on modifiable risk variables in Europe has shown that multi-domain lifestyle treatments for older persons at high risk of dementia may be practical and effective. Given the substantial differences between the Chinese and European populations in terms of demographics and living conditions, direct adoption of the European program in China remains unfeasible. Although a RCT has been conducted in China previously, its participants were mainly from rural areas in northern China and, thus, are not representative of the entire nation.There is an urgent need to establish cohorts that represent different economic, cultural, and geographical situations in order to explore implementation strategies and evaluate the effects of early multi-domain interventions more comprehensively and accurately. MEDTODS We developed an integrated intervention procedure implemented in urban neighborhood settings, namely China Initiative for Multi-Domain Intervention (CHINA-IN-MUDI). CHINA-IN-MUDI is a 2-year multicenter open-label cluster-randomised controlled trial centered around a Chinese-style multi-domain intervention to prevent cognitive decline. Participants aged 60-80 years were recruited from a nationally representative study, i.e. China Healthy Aging and Dementia Study cohort. An external harmonization process was carried out to preserve the original FINGER design. Subsequently, we standardized a series of Chinese-style intervention programs to align with cultural and socioeconomic status. Additionally, we expanded the secondary outcome list to include genomic and proteomic analyses. To enhance adherence and facilitate implementation, we leveraged an e-health application. RESULTS Screening commenced in July 2022. Currently, 1,965 participants have been randomized into lifestyle intervention (n = 772) and control groups (n = 1,193). Both the intervention and control groups exhibited similar baseline characteristics. Several lifestyle and vascular risk factors were present, indicating a potential window of opportunity for intervention. The intervention will be completed by 2025. CONCLUSIONS This project will contribute to the evaluation of the effectiveness and safety of intervention strategies in controlling AD risk and reducing clinical events, providing a basis for public health decision-making in China.
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Affiliation(s)
- S-Y Li
- Yan Zeng, Brain Science and Advanced Technology Institute, School of Medicine, Wuhan University of Science and Technology, West Huangjiahu Road, Hongshan District, Wuhan 430065, China. ; Jin-Tai Yu, Department of Neurology and National Center for Neurological Disorders, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Huashan Hospital, Shanghai Medical College, Fudan University, 12th Wulumuqi Zhong Road, Shanghai 200040, China. ; Wei Tan, Geriatric Hospital Affiliated to Wuhan University of Science and Technology, West Huangjiahu Road, Hongshan District, Wuhan 430065, China.
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Zhang JJ, Guo HY, Shang CL, Liu L, Huang CY, Wu ZX, Li Y, Wu Y, Li HJ, Liang HM, Xu B. [Investigation of familial tendency of endometriosis]. Zhonghua Fu Chan Ke Za Zhi 2023; 58:501-507. [PMID: 37474323 DOI: 10.3760/cma.j.cn112141-20221222-00768] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 07/22/2023]
Abstract
Objective: To investigate the familial heritability of endometriosis and to compare the clinical characteristics of patients with or without a family history of endometriosis. Methods: From January 2020 to June 2022, 850 patients with endometriosis confirmed by laparotomy or laparoscopy in Peking University Third Hospital were included in this study. Clinical data were collected, family history was followed up, and the differences of clinical indicators between patients with and without family history of endometriosis were compared. Results: A total of 850 patients were enrolled, with an average age of (33.8±7.0) years old, 315 (37.1%, 315/850) patients in stage Ⅲ and 496 (58.4%, 496/850) patients in stage Ⅳ. There were 100 patients with family history of endometriosis, accounting for 11.8% (100/850). Most of the 113 relatives involved were mothers, daughters and sisters (76.1%, 86/113), 81.5% (22/27) of the second and third degree relatives were maternal relatives. The median ages of patients with and without family history of endometriosis were 30 and 33 years old respectively at the time of diagnosis. The unmarried rate of patients with family history was higher [42.0% (42/100) vs 26.3% (197/750)]. The percentage of dysmenorrhea patients with family history was higher [89.0% (89/100) vs 55.5% (416/750)]. The medians of dysmenorrhea score in patients with and without family history were 6 and 2, and the median durations of dysmenorrhea were 10 and 1 years. There were significant differences in age, marital status, percentage of dysmenorrhea, dysmenorrhea score and duration (all P<0.001). The median levels of serum cancer antigen (CA) 125 in patients with family history and patients without family history at the time of diagnosis were 57.5 and 46.9 kU/L respectively, with a statistically significant difference (P<0.05). However, there were no significant differences between the two groups in nationality, bady mass index, menarche age, menstrual cycle, menstrual period, menstrual volume, serum CA19-9 level, cyst location and size, stage, history of adverse pregnancy and childbirth, infertility, adenomyosis and deep infiltrating endometriosis (all P>0.05). By comparing the specific conditions of dysmenorrhea patients with and without family history of endometriosis, there were no significant differences between the two groups in terms of the age of onset of dysmenorrhea, duration of dysmenorrhea, primary and secondary dysmenorrhea, and progressive aggravation of dysmenorrhea (all P>0.05). The difference in the degree of dysmenorrhea in dysmenorrhea patients with family history of endometriosis was significant (P<0.001). Conclusions: The incidence of endometriosis has a familial tendency, and most of the involved relatives are the first degree relatives. Compared with patients without family history of endometriosis, endometriosis patients with family history are diagnosed at an earlier age, with higher percentage of dysmenorrhea, had more severe dysmenorrhea and higher serum CA125 level.
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Affiliation(s)
- J J Zhang
- Department of Obstetrics and Gynecology, Peking University Third Hospital, Beijing 100191, China
| | - H Y Guo
- Department of Obstetrics and Gynecology, Peking University Third Hospital, Beijing 100191, China
| | - C L Shang
- Department of Obstetrics and Gynecology, Peking University Third Hospital, Beijing 100191, China
| | - L Liu
- Department of Obstetrics and Gynecology, Peking University Third Hospital, Beijing 100191, China
| | - C Y Huang
- Department of Obstetrics and Gynecology, Peking University Third Hospital, Beijing 100191, China
| | - Z X Wu
- Department of Obstetrics and Gynecology, Peking University Third Hospital, Beijing 100191, China
| | - Y Li
- Department of Obstetrics and Gynecology, Peking University Third Hospital, Beijing 100191, China
| | - Y Wu
- Department of Obstetrics and Gynecology, Peking University Third Hospital, Beijing 100191, China
| | - H J Li
- Department of Obstetrics and Gynecology, Peking University Third Hospital, Beijing 100191, China
| | - H M Liang
- Department of Obstetrics and Gynecology, Peking University Third Hospital, Beijing 100191, China
| | - B Xu
- Department of Obstetrics and Gynecology, Peking University Third Hospital, Beijing 100191, China
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Zhang BF, Fang J, Zhang ZQ, Ao XL, Xia L, Wu HC, Zhang SA, Wu ZX, Li DL. [Factors influencing bilirubin elevation and its correlation with UGT1A1 gene polymorphism in the early postoperative period of transjugular intrahepatic portosystemic shunt]. Zhonghua Gan Zang Bing Za Zhi 2023; 31:524-531. [PMID: 37365030 DOI: 10.3760/cma.j.cn501113-20220527-00285] [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] [Grants] [Subscribe] [Scholar Register] [Indexed: 06/28/2023]
Abstract
Objective: To investigate the factors influencing total bilirubin elevation and its correlation with UGT1A1 gene polymorphism in the early postoperative period of transjugular intrahepatic portosystemic shunt (TIPS). Methods: 104 cases with portal hypertension and esophageal variceal hemorrhage (EVB) treated with elective TIPS treatment were selected as the study subjects and were divided into a bilirubin-elevated group and a normal bilirubin group according to the total bilirubin elevation level during the early postoperative period. Univariate analysis and logistic regression were used to analyze the factors influencing total bilirubin elevation in the early postoperative period. PCR amplification and first-generation sequencing technology were used to detect the polymorphic loci of the UGT1A1 gene promoter TATA box, enhancer c.-3279 T > G, c.211G > A, and c.686C > A. Logistic regression was used to analyze the correlation of four locus alleles and genotypes with elevated total bilirubin in the early postoperative period. Results: Among the 104 cases, 47 patients were in the bilirubin elevated group, including 35 males (74.5%) and 12 females (25.5%), aged (50.72 ± 12.56) years. There were 57 cases in the normal bilirubin group, including 42 males (73.7%) and 15 females (26.3%), aged (51.63 ± 11.10) years. There was no statistically significant difference in age (t = -0.391, P = 0.697) and gender (χ(2) = 0.008, P = 0.928) between the two groups of patients. Univariate analysis revealed that preoperative alanine transaminase (ALT) level (χ(2) = 5.954, P = 0.015), total bilirubin level (χ(2) = 16.638, P < 0.001), MELD score (χ(2) = 10.054, P = 0.018), Child-Pugh score (χ(2) = 6.844, P = 0.022), and postoperative portal vein branch development (χ(2) = 6.738, P = 0.034) were statistically significantly different between the two groups. Logistic regression analysis showed that preoperative ALT level, total bilirubin level, and portal vein branch development after TIPS were correlated with the elevated total bilirubin in the early postoperative period. The polymorphism of the c.211G > A locus of the UGT1A1 gene correlation had elevated total bilirubin in the early postoperative period of TIPS. The risk of elevated total bilirubin was increased in the population carrying allele A (P = 0.001, OR = 4.049) in the early postoperative period. Allelic polymorphisms in the TATA box promoter region and enhancer c.-3279 T > G and c.686C > A had no statistically significant difference between the bilirubin-elevated group and the normal bilirubin group. Conclusion: The preoperative ALT level, total bilirubin level, and portal vein branch development are correlated with the elevated total bilirubin in early postoperative patients. The polymorphisms of the UGT1A1 gene and enhancer c.211G > A are correlated with the occurrence of elevated total bilirubin in the early postoperative period of TIPS. Allele A carrier may have a higher risk of elevated total bilirubin in the early postoperative period.
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Affiliation(s)
- B F Zhang
- Department of Hepatobiliary Internal Medicine, Fuzong Clinical Medical College of Fujian Medical University/ the 900th Hospital of the Joint Logistics Support Force, Fuzhou 350025, China, Fuzhou 350025, China Zhao Bifeng is working on the Department of Gastroenterology, Quanzhou First Hospital Affiliated to Fujian Medical University, Quanzhou 362046, China
| | - J Fang
- Department of Hepatobiliary Internal Medicine, The Third People's Hospital of Fujian University of Traditional Chinese Medicine, Fuzhou 350108, China
| | - Z Q Zhang
- Department of Hepatobiliary Internal Medicine, Fuzong Clinical Medical College of Fujian Medical University/ the 900th Hospital of the Joint Logistics Support Force, Fuzhou 350025, China, Fuzhou 350025, China
| | - X L Ao
- Department of Hepatobiliary Internal Medicine, Fuzong Clinical Medical College of Fujian Medical University/ the 900th Hospital of the Joint Logistics Support Force, Fuzhou 350025, China, Fuzhou 350025, China
| | - L Xia
- Department of Hepatobiliary Internal Medicine, The Third People's Hospital of Fujian University of Traditional Chinese Medicine, Fuzhou 350108, China
| | - H C Wu
- Department of Hepatobiliary Internal Medicine, Fuzong Clinical Medical College of Fujian Medical University/ the 900th Hospital of the Joint Logistics Support Force, Fuzhou 350025, China, Fuzhou 350025, China
| | - S A Zhang
- Department of Hepatobiliary Internal Medicine, Fuzong Clinical Medical College of Fujian Medical University/ the 900th Hospital of the Joint Logistics Support Force, Fuzhou 350025, China, Fuzhou 350025, China
| | - Z X Wu
- Department of Hepatobiliary Internal Medicine, Fuzong Clinical Medical College of Fujian Medical University/ the 900th Hospital of the Joint Logistics Support Force, Fuzhou 350025, China, Fuzhou 350025, China
| | - D L Li
- Department of Hepatobiliary Internal Medicine, Fuzong Clinical Medical College of Fujian Medical University/ the 900th Hospital of the Joint Logistics Support Force, Fuzhou 350025, China, Fuzhou 350025, China
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Xin RQ, Li WB, Hu ZW, Wu ZX, Sun W. MiR-329-3p inhibits hepatocellular carcinoma cell proliferation and migration through USP22-Wnt/β-Catenin pathway. Eur Rev Med Pharmacol Sci 2021; 24:9932-9939. [PMID: 33090397 DOI: 10.26355/eurrev_202010_23204] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE MicroRNA-329-3p (miR-329-3p) has been shown to be involved in tumor development. But its role in hepatocellular carcinoma has not been explored. Our study aims to explore the effect and mechanism of miR-329-3p on hepatocellular carcinoma development. PATIENTS AND METHODS Hepatocellular carcinoma tissues and paired paracancerous specimens from 31 hepatocellular carcinoma patients undergoing surgery were collected. Quantitative real-time polymerase chain reaction and Western blot were employed to measure genes expression at mRNA and protein level. CCK-8 and transwell assays were performed to evaluate hepatocellular carcinoma cells proliferation and migration. Dual-Luciferase reporter gene assay was designed to validate the target gene of miR-329-3p. RESULTS Our study showed miR-329-3p expression was significantly lower in hepatocellular carcinoma tissue. MiR-329-3p mimic inhibits proliferation and migration of HepG2 cells. By using Dual-Luciferase reporter gene assay, we proved that miR-329-3p inhibited HepG2 cell proliferation and migration by targeting USP22 directly. By up- and downregulation of USP22 expression, we also proved that USP22 can activate the Wnt/β-Catenin pathway, which in turn affected the proliferation and migration of HepG2 cells. CONCLUSIONS We demonstrated that miR-329-3p can inhibit HepG2 cell proliferation and migration by inhibiting USP22-Wnt/β-Catenin pathway. Our study provides novel insights into the aetiology and potential treatment of hepatocellular carcinoma.
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Affiliation(s)
- R-Q Xin
- Department of Hepatobiliary Surgery, Inner Mongolia People's Hospital, Hohhot, Inner Mongolia, P.R. China.
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Li L, Zou C, Dong S, Wu ZX, Ashby CR, Chen ZS, Qiu C. Lurbinectedin for the treatment of small cell lung cancer. Drugs Today (Barc) 2021; 57:377-385. [PMID: 34151904 DOI: 10.1358/dot.2021.57.6.3294559] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Small cell lung cancer (SCLC) is a rapidly progressive, aggressive metastatic and lethal subtype of lung cancer. Unfortunately, there has been little progress regarding the development of novel treatments for SCLC. However, lurbinectedin, a transcriptional inhibitor, has emerged as a potential novel treatment for cancer. It produces antitumor efficacy by inhibiting oncogenic transcription activity, inducing the accumulation of DNA double-strand breaks and modulating the tumor microenvironment (TME). Data from phase I/II trials indicates that lurbinectedin has significant antitumor efficacy and tolerable adverse effects in SCLC patients. Furthermore, lurbinectedin is efficacious in platinum-sensitive and platinum-resistant SCLC patients and in those with SCLC relapse after second-line treatment. In 2020, the U.S. Food and Drug Administration (FDA) approved lurbinectedin for the treatment of adult patients with metastatic SCLC or for patients that have received platinum-based chemotherapy. In this review, we discuss the molecular profile and the preclinical and clinical studies of lurbinectedin in the treatment of SCLC patients.
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Affiliation(s)
- L Li
- Key Laboratory of Shenzhen Respiratory Diseases, Institute of Respiratory Disease, The Second Affiliated Hospital of Jinan University, The First Affiliated Hospital of Southern University of Science and Technology, Shenzhen People's Hospital, Shenzhen, China
| | - C Zou
- Clinical Research Center, The Second Affiliated Hospital of Jinan University, The First Affiliated Hospital of Southern University of Science and Technology, Shenzhen People's Hospital, Shenzhen, China
| | - S Dong
- Clinical Research Center, The Second Affiliated Hospital of Jinan University, The First Affiliated Hospital of Southern University of Science and Technology, Shenzhen People's Hospital, Shenzhen, China
| | - Z-X Wu
- Department of Pharmaceutical Sciences, College of Pharmacy and Health Sciences, St. John's University, Queens, New York, USA
| | - C R Ashby
- Department of Pharmaceutical Sciences, College of Pharmacy and Health Sciences, St. John's University, Queens, New York, USA
| | - Z-S Chen
- Department of Pharmaceutical Sciences, College of Pharmacy and Health Sciences, St. John's University, Queens, New York, USA.
| | - C Qiu
- Key Laboratory of Shenzhen Respiratory Diseases, Institute of Respiratory Disease, The Second Affiliated Hospital of Jinan University, The First Affiliated Hospital of Southern University of Science and Technology, Shenzhen People's Hospital, Shenzhen, China.
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Abstract
Non-small cell lung cancer (NSCLC) is one of the most devastating cancers with high mortality worldwide. By inhibiting the activity of specific molecular targets in the cancer cells, tyrosine kinase inhibitors (TKIs) have become a standard treatment in combating NSCLC. Tepotinib hydrochloride is an orally bioavailable, mesenchymal-epithelial transition (MET) TKI developed mainly for selected NSCLC patients with METex14 skipping mutations. Tepotinib demonstrated durable clinical response in phase II clinical trials, which led to its approval for use in Japan and breakthrough therapy designation and accelerated approval in the U.S. These progresses highlighted tepotinib as a promising candidate for NSCLC patients. This review summarizes the pharmacological profile of tepotinib, preclinical studies and landmark clinical trials of tepotinib. In addition, we share our perspectives on the future direction of tepotinib as a novel anticancer drug.
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Affiliation(s)
- Z-X Wu
- Department of Pharmaceutical Sciences, College of Pharmacy and Health Sciences, St. John's University, Queens, New York, USA
| | - J Li
- Department of Pharmaceutical Sciences, College of Pharmacy and Health Sciences, St. John's University, Queens, New York, USA and Department of Otolaryngology-Head and Neck Surgery, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - S Dong
- Key Laboratory of Medical Electrophysiology of Education Ministry, School of Pharmacy, Southwest Medical University, China and Shenzhen Public Service Platform on Tumor Precision Medicine and Molecular Diagnosis, Southern University of Science and Technology, Shenzhen, Guangdong, China
| | - L Lin
- Cell Research Center, Shenzhen Bolun Institute of Biotechnology, Shenzhen, China
| | - C Zou
- Key Laboratory of Medical Electrophysiology of Education Ministry, School of Pharmacy, Southwest Medical University, China and Shenzhen Public Service Platform on Tumor Precision Medicine and Molecular Diagnosis, Southern University of Science and Technology, Shenzhen, Guangdong, China. zouchang.cuhk@gmail
| | - Z-S Chen
- Department of Pharmaceutical Sciences, College of Pharmacy and Health Sciences, St. John's University, Queens, New York, USA.
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Xiao XB, Gu Y, Sun DL, Ding LY, Yuan XG, Jiang HW, Wu ZX. Effect of rituximab combined with chemotherapy on the expression of serum exosome miR-451a in patients with diffuse large b-cell lymphoma. Eur Rev Med Pharmacol Sci 2020; 23:1620-1625. [PMID: 30840285 DOI: 10.26355/eurrev_201902_17121] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE The aim of this study was to investigate the influence of rituximab combined with chemotherapy on the expression of serum exosome micro ribonucleic acid 451a (miR-451a) in patients with diffuse large B-cell lymphoma (DLBCL), and to explore the possible underlying mechanism. PATIENTS AND METHODS 89 DLBCL patients (DLBCL group) receiving rituximab combined with chemotherapy were enrolled in this study. Meanwhile, 48 healthy controls (control group) were enrolled as well. Serum samples were collected from all patients before and after treatment, respectively. At the same time, blood samples of healthy people were collected, and serum exosome was extracted. Real-Time fluorescence-quantitative Polymerase Chain Reaction (qRT-PCR) was applied to measure the expression level of serum exosome miR-451a. Receiver operating characteristics (ROC) curve was used to evaluate the diagnostic efficiency of miR-451a. Statistical Product and Service Solutions (SPSS) 22.0 was employed for statistical analysis. Two-sided 95% confidence interval (CI) was used for all tests, and p<0.05 was considered statistically significant. RESULTS The expression level of miR-451a in the DLBCL group was significantly lower than that of the control group. The area under the ROC curve (AUC) for the diagnostic efficacy of serum exosome miR-451a for DCBCL was 0.7147. After treatment, the level of serum exosome miR-451a in patients was significantly increased, whereas was still lower than the normal level. The AUC of ROC for evaluating the effect of serum exosome miR-451a in DCBCL was 0.8038. CONCLUSIONS Serum exosome miR-451a has moderate diagnostic efficiency for DLBCL. Moreover, miR-451a can act as an indicator for evaluating the efficacy of rituximab combined with chemotherapy in the DLBCL treatment.
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Affiliation(s)
- X-B Xiao
- Department of Hematology, The Second Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China.
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Sun Y, Cheng J, Luo Y, Yan XL, Wu ZX, He LL, Tan YR, Zhou ZH, Li QN, Zhou L, Wu RT, Lan T, Ma JY. Attenuation of a virulent swine acute diarrhea syndrome coronavirus strain via cell culture passage. Virology 2019; 538:61-70. [PMID: 31580972 PMCID: PMC7112038 DOI: 10.1016/j.virol.2019.09.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2019] [Revised: 09/16/2019] [Accepted: 09/18/2019] [Indexed: 12/21/2022]
Abstract
Swine acute diarrhea syndrome coronavirus (SADS-CoV) is a newly identified enteric alphacoronavirus that causes fatal diarrhea in newborn piglets in China. Here, we propagated a virulent strain SADS-CoV/CN/GDWT/2017 in Vero cells for up to 83 passages. Four strains of SADS-CoV/GDWT-P7, -P18, -P48 and -P83 were isolated and characterized. Sequence alignments showed that these four novel strains exhibited 16 nucleotide mutations and resultant 10 amino acid substitutions in open reading frame 1a/1b, spike, NS3a, envelope, membrane and nucleocapsid proteins. Furthermore, a 58-bp deletion in NS7a/7b was found in P48 and P83 strains, which led to the loss of NS7b and 38 amino acid changes of NS7a. Pig infection studies showed that the P7 strain caused typical watery diarrhea, while the P83 strain induced none-to-mild, delayed and transient diarrhea. This is the first report on cell adaption of a virulent SADS-CoV strain, which gives information on the potential virulence determinants of SADS-CoV.
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Affiliation(s)
- Y Sun
- College of Animal Science, South China Agricultural University, Guangzhou, China
| | - J Cheng
- College of Animal Science, South China Agricultural University, Guangzhou, China
| | - Y Luo
- College of Animal Science, South China Agricultural University, Guangzhou, China
| | - X L Yan
- College of Animal Science, South China Agricultural University, Guangzhou, China
| | - Z X Wu
- College of Animal Science, South China Agricultural University, Guangzhou, China
| | - L L He
- College of Animal Science, South China Agricultural University, Guangzhou, China
| | - Y R Tan
- College of Animal Science, South China Agricultural University, Guangzhou, China
| | - Z H Zhou
- College of Animal Science, South China Agricultural University, Guangzhou, China
| | - Q N Li
- College of Animal Science, South China Agricultural University, Guangzhou, China
| | - L Zhou
- College of Animal Science, South China Agricultural University, Guangzhou, China
| | - R T Wu
- College of Animal Science, South China Agricultural University, Guangzhou, China
| | - T Lan
- College of Animal Science, South China Agricultural University, Guangzhou, China.
| | - J Y Ma
- College of Animal Science, South China Agricultural University, Guangzhou, China.
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Liu CX, Meng B, Li YB, Bai H, Wu ZX. A rare case of thoracic spinal intradural extramedullary enterogenous cyst with acute onset: case report and literature review. Ann R Coll Surg Engl 2019; 101:e142-e146. [PMID: 31155903 DOI: 10.1308/rcsann.2019.0066] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
The intraspinal enterogenous cyst, also called an neurenteric cyst, is a rare congenital disease. It was reported to be local to the C1 to L2 spinal segments, with the majority located in the cervicothoracic region. Most patients present with symptoms of progressive focal pain, myelopathic signs or radicular symptoms. We report a rare case of thoracic spinal intradural extramedullary enterogenous cyst with rapidly progressive weakness of both lower extremities. Additionally, we analysed the literature concerning the clinical features, diagnosis and prognosis of this disease.
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Affiliation(s)
- C X Liu
- Institute of Orthopaedics, Xijing Hospital, Fourth Military Medical University , Xi'an, Shaanxi Province , China
| | - B Meng
- Institute of Orthopaedics, Xijing Hospital, Fourth Military Medical University , Xi'an, Shaanxi Province , China
| | - Y B Li
- Institute of Orthopaedics, Xijing Hospital, Fourth Military Medical University , Xi'an, Shaanxi Province , China
| | - H Bai
- Institute of Orthopaedics, Xijing Hospital, Fourth Military Medical University , Xi'an, Shaanxi Province , China
| | - Z X Wu
- Institute of Orthopaedics, Xijing Hospital, Fourth Military Medical University , Xi'an, Shaanxi Province , China
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Mu XL, Wu ZX, Liang HJ, Wang Z, Fang X, Yang DH, Cao ZL, Gao ZC. [Soft-tissue angiosarcoma with pulmonary metastases: case report and literature review]. Zhonghua Jie He He Hu Xi Za Zhi 2017; 39:948-952. [PMID: 27938546 DOI: 10.3760/cma.j.issn.1001-0939.2016.12.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the differential diagnosis between pulmonary metastases from soft-tissue angiosarcoma and primary pulmonary angiosarcoma. Methods: A case of soft-tissue angiosarcoma with pulmonary metastases was reported and related literatures were reviewed. Results: A 39 year-old man complaining of hemoptysis, cough, and sputum for 10 months was admitted to our hospital in September 2013. He was initially diagnosed as having primary pulmonary angiosarcoma after wedge-resection biopsy of the lung. After 22 months since onset, he felt discomfort in his leg, which led to the confirmative diagnosis of soft-tissue angiosarcoma of the leg with multiple pulmonary metastases by a full-body PET/CT scan and core needle biopsy of the leg. Twenty-three articles concerning primary pulmonary angiosarcoma with complete records of history, treatment and follow-up of patients were included in the literature review. A total of 26 patients were reported in these articles, including 18 males, 8 females, age 19-85 years, average (52±18) years. Primary pulmonary angiosarcoma was mainly manifested as single or multiple pulmonary nodules or masses, with or without ground glass opacity. In our case, chest CT showed multiple thin-wall cysts and ground glass opacities, and recurrent spontaneous pneumothorax, which had never been reported in literatures on primary pulmonary angiosarcoma. Conclusions: Pulmonary metastases from soft-tissue angiosarcoma differed from primary pulmonary lesions in terms of chest imaging, with the former usually showing thin-wall cysts and pneumothorax. A full-body PET-CT was essential for differential diagnosis between primary and metastatic pulmonary angiosarcoma.
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Affiliation(s)
- X L Mu
- *Department of Respiratory and Critical Care Medicine, Peking University People Hospital, Beijing 100044, China
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12
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Chen ZR, Qian GB, Wu ZX. [Cryptogenetic multifocal ulcerous stenosing enteritis]. Zhonghua Nei Ke Za Zhi 2017; 56:618-620. [PMID: 28789501 DOI: 10.3760/cma.j.issn.0578-1426.2017.08.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
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13
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Wu ZX, Hunter DD, Batchelor TP, Dey RD. Side-stream tobacco smoke-induced airway hyperresponsiveness in early postnatal period is involved nerve growth factor. Respir Physiol Neurobiol 2016; 223:1-8. [PMID: 26638730 DOI: 10.1016/j.resp.2015.11.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2015] [Revised: 11/11/2015] [Accepted: 11/12/2015] [Indexed: 12/28/2022]
Abstract
Epidemiological studies have shown that children are more susceptible to adverse respiratory effects of passive smoking than adults. The goal of this study is to elucidate the possible neural mechanism induced by exposure to passive smoking during early life. Postnatal day (PD) 2 and PD 21 mice were exposed to side-stream tobacco smoke (SS), a surrogate to secondhand smoke, or filtered air (FA) for 10 consecutive days. Pulmonary function, substance P (SP) airway innervation, neurotrophin gene expression in lung and nerve growth factor (NGF) release in bronchoalveolar lavage (BAL) fluid were measured at different times after the last SS or FA exposure. Exposure to SS significantly altered pulmonary function in PD2, accompanied with an enhanced SP innervation in airway. However, exposure to SS during the later developmental period (PD21) did not appear to affect pulmonary function and SP innervation of the airways. Interestingly, SS exposure in PD2 group significantly induced an increased gene expression on NGF, and decreased NGF receptor P75 in lung; parallel with high levels of NGF protein in BAL. Furthermore, pretreatment with NGF antibody significantly diminished SS-induced airway hyperresponsivenss and the increased SP airway innervation in the PD2 group. These findings suggest that enhanced NGF released in the lung contributes to SS-enhanced SP tracheal innervation and airway responsiveness in early life.
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Affiliation(s)
- Z-X Wu
- Department of Neurobiology and Anatomy, Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV 26506, United States.
| | - D D Hunter
- Department of Neurobiology and Anatomy, Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV 26506, United States
| | - T P Batchelor
- Department of Neurobiology and Anatomy, Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV 26506, United States
| | - R D Dey
- Department of Neurobiology and Anatomy, Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV 26506, United States
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Abstract
B7-H4 is member of the B7 family that negatively regulates the immune response, which are important for fine-tuning of the tumor microenvironment. Dysregulation of B7-H4 expression has been associated with tumor progression. However, expression level of B7-H4 in hepatocellular carcinoma (HCC) tissues is still a controversial topic. In addition, whether serum B7-H4 expression of HCC patients has any clinical value is unknown. We compared serum levels of B7-H4 in patients with HCC and healthy controls by using the ELISA method. Association between serum B7-H4 expression level and clinical parameters of HCC was further investigated. Log-rank test and Kaplan-Meier method were employed to evaluate the overall survival rate of HCC patients. Univariate and multivariate analysis of prognostic factors were performed with the Cox regression model. Our results showed that HCC patients had significantly higher serum B7-H4 level as compared with healthy controls (P < 0.001). In addition, serum B7-H4 expression was correlated with HCC clinical parameters including serum AFP expression and TNM stage. HCC patients in the higher serum B7-H4 expression group had a poorer 5-year overall survival rate (P = 0.028). Moreover, serum B7-H4 expression was shown to be an independent prognostic factor for HCC (P = 0.034). The findings from this study suggest that serum B7-H4 is an independent prognostic indicator for HCC and may be a promising biomarker for early diagnosis as well as disease prognosis of HCC.
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Affiliation(s)
- S A Zhang
- Department of Hepatobiliary Medicine, Fuzhou PLA General Hospital, Fuzhou Fujian, China
| | - Z X Wu
- Department of Hepatobiliary Medicine, Fuzhou PLA General Hospital, Fuzhou Fujian, China
| | - X Zhang
- Department of Hepatobiliary Medicine, Fuzhou PLA General Hospital, Fuzhou Fujian, China
| | - Z Y Zeng
- Department of Hepatobiliary Medicine, Fuzhou PLA General Hospital, Fuzhou Fujian, China
| | - D L Li
- Department of Hepatobiliary Medicine, Fuzhou PLA General Hospital, Fuzhou Fujian, China
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Niu WY, Wan YG, Li MY, Wu ZX, Zhang LG, Wang JX. The diagnostic value of serum procalcitonin, IL-10 and C-reactive protein in community acquired pneumonia and tuberculosis. Eur Rev Med Pharmacol Sci 2013; 17:3329-3333. [PMID: 24379064] [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: 06/03/2023]
Abstract
AIM To explore the diagnostic value of serum procalcitonin (PCT), interleukin-10 (IL-10), C-reactive protein (CRP) and erythrocyte sedimentation rate (ESR) in community acquired pneumonia (CAP) and tuberculosis (PTB). PATIENTS AND METHODS 113 CAP cases patients and 78 PTB cases were enrolled from May 2011 to March 2012. Routine blood test, serum PCT, CRP, IL-10 and ESR of patients within 24 hours were analyzed retrospectively. RESULTS The serum concentrations of PCT, IL-10, CRP and ESR in CAP patients with CAP were 0.35±0.017 mg/mL, 0.095±0.004 mg/L, 59.80±5.12 mg/L and 35.00±4.81 mm/1h, respectively, significantly higher than patients with PTB (p < 0.01); According to the result of ROC curve analysis in CAP and PTB, the PTC area under ROC curve is 0.715 (95% CI 0.647-0.782), the sensitivity and specific degree of serum PTC were significant better than CRP and IL10 (p < 0.05). In tuberculosis sputum culture, the serum concentrations of IL-10 and ESR in TB positive group were 0.045±0.013 mg/L and 62.50±8.69 mm/1h, significantly higher than that of TB negative group (p < 0.05); whereas, the concentrations of serum PCT and CRP in TB positive and negative groups had no significant difference (p > 0.05). CONCLUSIONS The levels of serum PCT, IL-10, CRP and ESR in CAP patients are higher than that in PTB patients. Therefore, the serum PCT, IL10, CRP and ESR level is benefit to distinguish between CAP and PTB. This could provide a comprehensible evidence for both diagnosis and prognosis.
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Affiliation(s)
- W-Y Niu
- Department of Tuberculosis, The First Affiliated Hospital of Xinxiang Medical University, Weihui, Henan Province, P.R. China.
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Luo YZ, Lin L, Liu Y, Wu ZX, Gu ZM, Li LJ, Yuan JF. Haematopoietic necrosis of cultured Prussian carp, Carassius gibelio (Bloch), associated with Cyprinid herpesvirus 2. J Fish Dis 2013; 36:1035-1039. [PMID: 23617723 DOI: 10.1111/jfd.12110] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2013] [Revised: 03/01/2013] [Accepted: 03/02/2013] [Indexed: 06/02/2023]
Affiliation(s)
- Y Z Luo
- Department of Aquatic Animal Medicine, College of Fisheries, Huazhong Agricultural University, Wuhan, China; Key Lab of Freshwater Animal Breeding, Ministry of Agriculture, Wuhan, China
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Qi W, Yan YB, Lei W, Wu ZX, Zhang Y, Liu D, Shi L, Cao PC, Liu N. Prevention of disuse osteoporosis in rats by Cordyceps sinensis extract. Osteoporos Int 2012; 23:2347-57. [PMID: 22159671 DOI: 10.1007/s00198-011-1842-4] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/12/2011] [Accepted: 11/03/2011] [Indexed: 10/14/2022]
Abstract
UNLABELLED Cordyceps sinensis has been known as a traditional medicine in China, and C. sinensis plus strontium could prevent osteoporosis in ovariectomized rats. The present study shows that daily oral administration of C. sinensis at higher doses in adult hind limb suspension rats can prevent disuse-induced bone loss and deterioration of trabecular microarchitecture. INTRODUCTION Cordyceps sinensis induces estradiol production and prevents osteoporosis in ovariectomized rats. This study was to examine whether C. sinensis can prevent disuse-induced osteoporosis. METHODS Rats were randomly divided into six groups, and five groups were treated with hind limb suspension (HLS). One HLS group received alendronate (2.0 mg/kg/day) orally, and to the three other HLS groups to each group, a different amount of C. sinensis (100, 300, and 500 mg/kg/day) was orally administered for 8 weeks before and after HLS. The remaining HLS group was set as a control without treatment. Each group consisted of 10 males and females. The body weights, biochemical parameters in serum and urine, bone mineral density (BMD), bone mineral content (BMC), mechanical testing, and bone microarchitecture were examined. RESULTS Treatments with higher C. sinensis dosage (300 and 500 mg/kg/day) or alendronate had a positive effect on body weights, mechanical strength, BMD, and BMC compared to the other HLS groups. C. sinensis decreased markers of bone turnover dose dependently and increased the osteocalcin levels in HLS rats. The result of micro-CT analysis from the L4 vertebra showed that C. sinensis (500 mg/kg) significantly prevented the reduction of the bone volume fraction, connectivity density, trabeculae number, and thickness as well as improved the trabeculae separation and structure model index in HLS rats. CONCLUSIONS The present study demonstrates that administration of C. sinensis at higher doses over an 8-week period can prevent the disuse osteoporosis in rats. It implies that C. sinensis might be an alternative therapy for prevention of disuse-induced osteoporosis also in humans.
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Affiliation(s)
- W Qi
- Department of Orthopaedics, Xijing Hospital, The Fourth Military Medical University, No 15 Changle West Road, Xi'an, China
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Wu ZX, Benders KB, Hunter DD, Dey RD. Early postnatal exposure of mice to side-steam tobacco smoke increases neuropeptide Y in lung. Am J Physiol Lung Cell Mol Physiol 2011; 302:L152-9. [PMID: 22003086 DOI: 10.1152/ajplung.00071.2011] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Our recent study showed that prenatal and early postnatal exposure of mice to side-steam tobacco smoke (SS), a surrogate to environmental tobacco smoke (ETS), leads to increased airway responsiveness and sensory innervation later in life. However, the underlying mechanism initiated in early life that affects airway responses later in life remains undefined. The concomitant increase in nerve growth factor (NGF) after exposures suggests that NGF may be involved the regulation of airway innervation. Since NGF regulates sympathetic nerve responses, as well as sensory nerves, we extended previous studies by examining neuropeptide Y (NPY), a neuropeptide associated with sympathetic nerves. Different age groups of mice, postnatal day (PD) 2 and PD21, were exposed to either SS or filtered air (FA) for 10 consecutive days. The level of NPY protein in lung and the density of NPY nerve fibers in tracheal smooth muscle were significantly increased in the PD2-11SS exposure group compared with PD2-11FA exposure. At the same time, the level of NGF in lung tissue was significantly elevated in the PD2-11SS exposure groups. However, neither NPY (protein or nerves) nor NGF levels were significantly altered in PD21-30SS exposure group compared with the PD21-30FA exposure group. Furthermore, pretreatment with NGF antibody or K252a, which inhibits a key enzyme (tyrosine kinase) in the transduction pathway for NGF receptor binding, significantly diminished SS-enhanced NPY tracheal smooth muscle innervation and the increase in methacholine-induced airway resistance. These findings show that SS exposure in early life increases NPY tracheal innervation and alters pulmonary function and that these changes are mediated through the NGF.
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Affiliation(s)
- Z-X Wu
- Dept. of Neurobiology and Anatomy, PO Box 9128, Robert C. Byrd Health, Sciences Center, West Virginia Univ., Morgantown, WV 26506, USA.
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Pan JW, Zhou HJ, Zhan RY, Wan S, Yan M, Fan WJ, Wu ZX, Zheng SS. Supratentorial Brain AVM Embolization with Onyx-18 and Post-Embolization Management. A Single-Center Experience. Interv Neuroradiol 2009; 15:275-82. [PMID: 20465910 DOI: 10.1177/159101990901500304] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2009] [Accepted: 06/14/2009] [Indexed: 12/21/2022] Open
Abstract
SUMMARY Onyx is increasingly used in endovascular therapy of intracranial arteriovenous malformations (AVMs). However, the embolic effect and post-embolization management are still under discussion. We report our experience in the treatment of supratentorial brain arteriovenous malformations (SBAVMs) with Onyx and discuss post-embolic management. From June 2006 to July 2008, 20 patients with SBAVM were embolized with Onyx. There were 14 men and six women ranging from 14 to 64 years of age (mean 38.3 years). Initial symptoms included spontaneous hemorrhage (n=12), headaches (n=4), seizure (n=3) and incidentally disclosed after head trauma (n=1). After the endovascular procedure, all had subsequent treatment (follow-up angiogram, stereotactic radiosurgery or microsurgery) according to the obliteration degree. At angiography, seven patients (35%, 7/20) were completely obliterated (over 95% closure) after embolization while one suffered a small subarachnoid hemorrhage without permanent clinical sequelae. Four patients (20%, 4/20) were subtotally obliterated (over 80% closure), one patient who suffered severe cerebral edema after embolization underwent decompressive craniectomy, two patients had additional radiosurgery and one patient had follow-up angiogram. Nine patients (45%, 9/20) were partially obliterated (20-80% closure), five patients had additional surgery, two patients had additional radiosurgery and two patients had follow-up angiogram (one patient had intraventricular hemorrhage three months after embolization). Of all 20 AVMs, an average of 2.2 ml Onyx was used per patient and average volume reduction was 80% (range, 30%-99%). Onyx is suitable for embolization of SBAVMs because of its diffuse controllable properties. We suggest clinical follow-up after complete obliteration, additional radiosurgery or angiographic follow-up after subtotal obliteration and additional surgery after partially obliteration. More cases with long-term follow-up are needed to evaluate the long-term prognosis of our post-embolization management.
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Affiliation(s)
- J W Pan
- Department of Neurosurgery, First Affiliated Hospital, College of Medicine, Zhejiang University; Hangzhou, China - or
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Abstract
Nerve growth factor (NGF), a member of the neurotrophin family, enhances synthesis of neuropeptides in sensory and sympathetic neurons. The aim of this study was to examine the effect of NGF on airway responsiveness and determine whether these effects are mediated through synthesis and release of substance P (SP) from the intrinsic airway neurons. Ferrets were instilled intratracheally with NGF or saline. Tracheal smooth muscle contractility to methacholine and electrical field stimulation (EFS) was assessed in vitro. Contractions of isolated tracheal smooth muscle to EFS at 10 and 30 Hz were significantly increased in the NGF treatment group (10 Hz: 33.57 ± 2.44%; 30 Hz: 40.12 ± 2.78%) compared with the control group (10 Hz: 27.24 ± 2.14%; 30 Hz: 33.33 ± 2.31%). However, constrictive response to cholinergic agonist was not significantly altered between the NGF treatment group and the control group. The NGF-induced modulation of airway smooth muscle to EFS was maintained in tracheal segments cultured for 24 h, a procedure that causes a significant anatomic and functional loss of SP-containing sensory fibers while maintaining viability of intrinsic airway neurons. The number of SP-containing neurons in longitudinal trunk and superficial muscular plexus and SP nerve fiber density in tracheal smooth muscle all increased significantly in cultured trachea treated with NGF. Pretreatment with CP-99994, an antagonist of neurokinin 1 receptor, attenuated the NGF-induced increased contraction to EFS in cultured segments but had no effect in saline controls. These results show that the NGF-enhanced airway smooth muscle contractile responses to EFS are mediated by the actions of SP released from intrinsic airway neurons.
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Affiliation(s)
- Z-X Wu
- Dept. of Neurobiology and Anatomy, West Virginia Univ., Morgantown, WV 26506, USA
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Wu ZX, Yang QH, Ruan T, Lee LY. Influence of maturation on constrictive response to stimulation of C-fiber afferents in isolated guinea pig airways. Am J Physiol Lung Cell Mol Physiol 2004; 287:L168-75. [PMID: 14977626 DOI: 10.1152/ajplung.00156.2003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
We investigated whether the airway constrictive response to stimulation of bronchopulmonary C-fiber afferents is altered during the maturation process. Isometric tension was measured in airway rings isolated from three tracheobronchial locations (intrathoracic trachea and main and hilar bronchi) and compared in mature [M, 407 ± 10 (SE) g body wt, n = 36] and immature (IM, 161 ± 5 g body wt, n = 35) guinea pigs. Our results showed no difference in the ACh (10−5 M)- or KCl (40 mM)-induced contraction between M and IM groups, regardless of the airway location. In sharp contrast, the concentration-response curves of 10−8–10−6 M capsaicin were distinctly lower in IM hilar bronchi; for example, response to the same concentration of capsaicin (10−6 M) was 89.2 ± 15.3% of the response to 10−5 M ACh in IM and 284.7 ± 43.2% in M animals. Similar, but smaller, differences in the bronchoconstrictive response to capsaicin between IM and M groups were also observed in the trachea and main bronchus. Electrical field stimulation induced airway constriction in all three locations in M and IM groups. However, after administration of 10−6 M atropine and 10−6 M propranolol, electrical field stimulation-induced contraction was significantly smaller in the hilar bronchus of IM than M animals, and this difference was not prevented by pretreatment with 5 × 10−5 M indomethacin. Although radioimmunoassay showed no difference in the tissue content of substance P between M and IM airways, the constrictive responses to exogenous substance P and neurokinin A were markedly greater in M airways at all three locations. In conclusion, the constriction of isolated airways evoked by C-fiber stimulation was significantly weaker in the IM guinea pigs, probably because of a less potent effect of tachykinins on the airway smooth muscle.
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Affiliation(s)
- Z-X Wu
- Department of Physiology, University of Kentucky Medical Center, Lexington, 40536, USA
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Wu ZX, Satterfield BE, Fedan JS, Dey RD. Interleukin-1beta-induced airway hyperresponsiveness enhances substance P in intrinsic neurons of ferret airway. Am J Physiol Lung Cell Mol Physiol 2002; 283:L909-17. [PMID: 12376343 DOI: 10.1152/ajplung.00363.2001] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Interleukin (IL)-1beta causes airway inflammation, enhances airway smooth muscle responsiveness, and alters neurotransmitter expression in sensory, sympathetic, and myenteric neurons. This study examines the role of intrinsic airway neurons in airway hyperresponsiveness (AHR) induced by IL-1beta. Ferrets were instilled intratracheally with IL-1beta (0.3 microg/0.3 ml) or saline (0.3 ml) once daily for 5 days. Tracheal smooth muscle contractility in vitro and substance P (SP) expression in tracheal neurons were assessed. Tracheal smooth muscle reactivity to acetylcholine (ACh) and methacholine (MCh) and smooth muscle contractions to electric field stimulation (EFS) both increased after IL-1beta. The IL-1beta-induced AHR was maintained in tracheal segments cultured for 24 h, a procedure that depletes SP from sensory nerves while maintaining viability of intrinsic airway neurons. Pretreatment with CP-99994, an antagonist of neurokinin 1 receptor, attenuated the IL-1beta-induced hyperreactivity to ACh and MCh and to EFS in cultured tracheal segments. SP-containing neurons in longitudinal trunk, SP innervation of superficial muscular plexus neurons, and SP nerve fiber density in tracheal smooth muscle all increased after treatment with IL-1beta. These results show that IL-1beta-enhanced cholinergic airway smooth muscle contractile responses are mediated by the actions of SP released from intrinsic airway neurons.
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Affiliation(s)
- Z-X Wu
- Department of Neurobiology and Anatomy, Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown 26506, West Virginia 26506, USA
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Yang QH, Wu ZX, Lee LY. Involvement of nonadrenergic noncholinergic mechanisms in bronchomotor response to capsaicin and electrical field stimulation in immature guinea pigs. J Allergy Clin Immunol 2002. [DOI: 10.1016/s0091-6749(02)81192-7] [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: 11/16/2022]
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Yin K, Ding YL, Wu ZX, Yang XJ. [Aneurysmal model induced by elastase]. Zhongguo Yi Xue Ke Xue Yuan Xue Bao 2001; 23:435-8. [PMID: 12905857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 03/04/2023]
Abstract
OBJECTIVE To induce the aneurysms by corrosion of aneurysmal wall with elastase, imitating clinical intracranial aneurysms patho-morhologically. METHODS The elastase-corroded arterial segments were transplanted onto lateral walls of carotid arteries. Follow-up and pathological examination of the aneurysms were made at two weeks and one month after construction. RESULTS The aneurysms formed by the transplantation of elastase-corroded arterial segments were found persistent or enlarge a little within one month. The aneurysms were purplish red and easy to rupture when exposed. The walls were deprived of elastic layer, and constructed by thin connective tissue. CONCLUSIONS The aneurysms made by transplanting elastase-corroded arterial segments are simple to built, while morphological and pathological characteristics are demonstrated good clinical mimicry, we believe our aneurysm model may well substitute the most popularly used aneurysms made of venous pouches.
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Affiliation(s)
- K Yin
- Department of Interventional Neuroradiology, Beijing Neurosurgical Institute, CAMS, Beijing 100050, China
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Kwong K, Wu ZX, Kashon ML, Krajnak KM, Wise PM, Lee LY. Chronic smoking enhances tachykinin synthesis and airway responsiveness in guinea pigs. Am J Respir Cell Mol Biol 2001; 25:299-305. [PMID: 11588007 DOI: 10.1165/ajrcmb.25.3.4557] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.4] [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: 11/24/2022] Open
Abstract
This study tests the hypothesis that the bronchial hyperreactivity induced by chronic cigarette smoke (CS) exposure involves the increased expression and release of tachykinins and calcitonin gene-related peptide (CGRP) from afferent nerve fibers innervating the airways. In guinea pigs chronically exposed to CS (20 min twice daily for 14-17 d), peak response in total lung resistance to capsaicin (1.68 microg/kg, intravenously) was significantly greater than that evoked by the same dose of capsaicin in control (air-exposed) animals. This augmented response in CS-exposed animals was abolished after treatment with CP-99994 and SR-48968, the neurokinin (NK)-1 and NK-2 receptor antagonists, suggesting the involvement of tachykinins in chronic CS-induced airway hyperresponsiveness (AHR). Further, substance P (SP)-like immunoreactivity (LI) and CGRP-LI in the airway tissue were significantly greater in the CS animals than in the control animals. Finally, beta-preprotachykinin (PPT, a splice variant from the PPT A gene encoding tachykinins including SP and NKA) messenger RNA levels as measured by in situ hybridization histochemistry displayed a significant increase in jugular ganglion neurons but not in dorsal root or nodose ganglion neurons. These data suggest that chronic CS-induced AHR is related to an increase in SP synthesis and release in jugular ganglion neurons innervating the lungs and airways.
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Affiliation(s)
- K Kwong
- Department of Physiology, University of Kentucky, Lexington, Kentucky 40536, USA
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Wu ZX, Maize DF, Satterfield BE, Frazer DG, Fedan JS, Dey RD. Role of intrinsic airway neurons in ozone-induced airway hyperresponsiveness in ferret trachea. J Appl Physiol (1985) 2001; 91:371-8. [PMID: 11408454 DOI: 10.1152/jappl.2001.91.1.371] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [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: 11/22/2022] Open
Abstract
Exposure to ozone (O(3)) enhances airway responsiveness, which is mediated partly by the release of substance P (SP) from airway neurons. In this study, the role of intrinsic airway neurons in O(3)-induced airway responses was examined. Ferrets were exposed to 2 ppm O(3) or air for 1 h. Reactivity of isolated tracheal smooth muscle to cholinergic agonists was significantly increased after O(3) exposure, as were contractions to electrical field stimulation at 10 Hz. Pretreatment with CP-99994, a neurokinin type 1 receptor antagonist, partially abolished the O(3)-induced reactivity to cholinergic agonists and electrical field stimulation. The O(3)-enhanced airway responses were present in tracheal segments cultured for 24 h, a procedure shown to deplete sensory nerves while maintaining viability of intrinsic airway neurons, and all the enhanced smooth muscle responses were also diminished by CP-99994. Immunocytochemistry showed that the percentage of SP-containing neurons in longitudinal trunk and the percentage of neurons innervated by SP-positive nerve fibers in superficial muscular plexus were significantly increased at 1 h after exposure to O(3). These results suggest that enhanced SP levels in airway ganglia contribute to O(3)-induced airway hyperresponsiveness.
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Affiliation(s)
- Z X Wu
- Department of Anatomy, Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, West Virginia 26506, USA
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Qu XH, Huang KX, Wu ZX, Zhong S, Deng LQ, Xu HB. An external-sample liquid scintillation counting for 75Se and its application to selenoprotein detection. Biol Trace Elem Res 2000; 77:287-300. [PMID: 11204470 DOI: 10.1385/bter:77:3:287] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/10/2000] [Accepted: 02/05/2000] [Indexed: 11/11/2022]
Abstract
An external-sample liquid scintillation (LS) counting for the gamma emitter 75Se has been developed. An expressly designed well-type LS vial and a 2,5-diphenyoxazole-1,4-bis(5-phenyl-2-oxazoyl)-benzene-xylene solution containing 35% tertrabutylzinn allow 75Se to be counted in a standard LS counter with counting efficiency up to 43.2%, much higher than that of conventional LS counting method. This external sample LS has a good count rate linearity and exhibits low background count rates. After in vivo labeling with [75Se]selenite, 75Se distributions and the Se-containing proteins present in tissues of male rat were investigated by means of sodium dodecyl sulfate-polyacrylamide gel electrophoresis, external-sample LS and gamma-detector. Eight Se-containing proteins or protein subunits were detected to be Se-containing proteins or protein subunits in arterial wall, and their apparent molecular masses (Mr) were 76.4, 67.0, 57.4, 30.3, 25.4, 22.7, 21.7, and 15.1 kDa, respectively. In addition, eight 75Se-labeled proteins (Mr: 66.8, 57.0, 43.1, 30.0, 24.8, 19.8, 18.0, and 14.8 kDa) were found in brain homogenates, and nine 75Se-labeled proteins (Mr: 117.0, 78.0, 66.6, 57.2, 43.0, 38.1, 25.0, 20.1, and 18.0 kDa) were detected in testis homogenates. Some of them should be new biologically important selenoproteins that have not been identified so far.
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Affiliation(s)
- X H Qu
- Department of Chemistry, Huazhong University of Science and Technology, Wuhan, People's Republic of China
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Abstract
This study was carried out to determine if the bronchoconstrictive effect of cigarette smoke (CS) is enhanced when airway hyperresponsiveness is induced by ovalbumin (Ova) sensitization, and if so, whether an increase in endogenously released tachykinins is involved. The bronchoconstrictive effects of an acute CS inhalation challenge (15 ml; 50% concentration) were compared between guinea pigs sensitized with aerosolized Ova and matching control animals (receiving saline aerosol). In Ova-sensitized animals, there were marked increases in the numbers of eosinophils and neutrophils in the bronchoalveolar lavage fluid (BALF), which was accompanied by an elevated bronchomotor response to acetylcholine (ACh). The baseline lung resistance (RL) and dynamic pulmonary compliance (Cdyn) were not significantly different between the two groups; however, the same CS inhalation challenge evoked a significantly more intense bronchoconstriction in the Ova-sensitized group (control group: DeltaRL = 68 +/- 8%, DeltaCdyn = -26 +/- 6%; Ova group: DeltaRL = 425 +/- 76%; DeltaCdyn = -47 +/- 8%). The levels of substance P-like immunoreactivity (SP-LI) and calcitonin gene-related peptide-like immunoreactivity (CGRP-LI) measured in the bronchoalveolar lavage (BAL) collected after CS inhalation challenge were also significantly greater in Ova-sensitized animals than in control animals. Furthermore, pretreatment with SR-48968, a selective antagonist of neurokinin-2 (NK(2)) receptor, inhibited more than 85% of the enhanced bronchomotor responses to CS challenge, but did not significantly reduce the airway hyperresponsiveness to ACh in Ova-sensitized guinea pigs. These results show that Ova sensitization induces airway hyperresponsiveness to inhaled CS, and that the endogenous tachykinins evoked by CS-induced activation of lung C fibers play a primary role in this augmented response.
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Affiliation(s)
- Z X Wu
- Department of Physiology and Division of Allergy and Immunology, University of Kentucky, Lexington, Kentucky 40536-0084, USA
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29
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Abstract
This study was carried out to determine whether tachykinins released from lung C-fiber afferents play a part in the bronchial hyperreactivity induced in guinea pigs by chronic exposure to cigarette smoke (CS). Two matching groups of young guinea pigs were exposed to either mainstream CS (CS group) or air (control group) for 20 min twice daily for 14-17 days. There was no difference in the baseline total pulmonary resistance (RL) between the two groups, but the baseline dynamic lung compliance was reduced ( approximately 19%) in CS animals. The responses of RL to intravenous injections of ACh, neurokinin (NK) A, and capsaicin were all markedly increased in CS animals; for example, ACh at the same dose of 5.06 microg/kg increased RL by 207% in the control group and by 697% (n = 8; P < 0. 001) in the CS group. The increased responsiveness was accompanied by significant increases in the numbers of neutrophils, eosinophils, and macrophages in the bronchoalveolar lavage fluid in CS animals. Pretreatment with SR-48968 and CP-99994, antagonists of NK(1) and NK(2) receptors, respectively, did not alter the response of RL to ACh in control animals, but it abolished the elevated bronchoconstrictive response in the CS animals. Furthermore, the immunoreactivities of substance P and calcitonin gene-related peptide in the bronchoalveolar lavage fluid collected after capsaicin challenge were significantly increased in CS animals. These results show that chronic exposure to CS induced airway mucosal inflammation accompanied by bronchial hyperreactivity in guinea pigs and that the tachykininergic mechanism plays an important role in this augmented responsiveness.
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Affiliation(s)
- Z X Wu
- Department of Physiology, University of Kentucky, Lexington, Kentucky 40536, USA
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30
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Abstract
Acute exposure to ozone (O3) induces airway hyperresponsiveness to various inhaled bronchoactive substances. Inhalation of cigarette smoke, a common inhaled irritant in humans, is known to evoke a transient bronchoconstrictive effect. To examine whether O3 increases airway responsiveness to cigarette smoke, effects of smoke inhalation challenge on total pulmonary resistance (RL) and dynamic lung compliance (Cdyn) were compared before and after exposure to O3 (1.5 ppm, 1 h) in anesthetized guinea pigs. Before O3 exposure, inhalation of two breaths of cigarette smoke (7 ml) at a low concentration (33%) induced a mild and reproducible bronchoconstriction that slowly developed and reached its peak (DeltaRL = 67 +/- 19%, DeltaCdyn = -29 +/- 6%) after a delay of >1 min. After exposure to O3 the same cigarette smoke inhalation challenge evoked an intense bronchoconstriction that occurred more rapidly, reaching its peak (DeltaRL = 620 +/- 224%, DeltaCdyn = -35 +/- 7%) within 20 s, and was sustained for >2 min. By contrast, sham exposure to room air did not alter the bronchomotor response to cigarette smoke challenge. Pretreatment with CP-99994 and SR-48968, the selective antagonists of neurokinin type 1 and 2 receptors, respectively, completely blocked the enhanced responses of RL and Cdyn to cigarette smoke challenge induced by O3. These results show that O3 exposure induces airway hyperresponsiveness to inhaled cigarette smoke and that the enhanced responses result primarily from the bronchoconstrictive effect of endogenous tachykinins.
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Affiliation(s)
- Z X Wu
- Department of Physiology, University of Kentucky, Lexington, Kentucky 40536, USA
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31
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Ye XP, Fu YL, Wu ZX, Anderson RM, Agnew A. The effects of temperature, light and water upon the hatching of the ova of Schistosoma japonicum. Southeast Asian J Trop Med Public Health 1997; 28:575-80. [PMID: 9561611] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Eggs of Schistosoma japonicum were obtained from infected patients' feces from Yujiang City, China to observe the effects of temperature, light and water on the hatching of eggs. The temperature of water and light played important roles on the hatching of S. japonicum, but the type of water did not. A constant temperature of 28 degrees C and electrical light produced the highest rate of hatching, and reproducible results, whereas a temperature of 4 degrees C or 37 degrees C, and the absence of light inhabited the hatching of eggs. The percentage of eggs hatched during the first 8 hours of 24 hours incubation was 94.90%, so that using the hatching rate of the first 8 hours could approximate the total hatching rate of samples.
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Affiliation(s)
- X P Ye
- Wellcome Trust Centre for the Epidemiology of Infectious Disease, University of Oxford, UK
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32
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Liu YS, Du WP, Xue JQ, Chen M, Ma QY, Zhang SH, Wang JF, Liu J, Wu ZX. Combinations of three immunological assays for detecting anti-Toxoplasma IgG in the sera of patients infected with Toxoplasma gondii. Southeast Asian J Trop Med Public Health 1997; 28:335-8. [PMID: 9444016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Enzyme-linked immunosorbent assay (ELISA), Dot-ELISA and Dot-immunogold silver staining (Dot-IGSS) were simultaneously used to detect the specific IgG against Toxoplasma gondii in 65 patients infected with the protozoa. The positive rates were 86.51%, 92.51% and 98.64%, respectively. When ELISA and Dot-ELISA results were put together, the positive rate increased to 95.38%. When Dot-IGSS results were combined with those of ELISA or Dot-ELISA, the positive rate was raised to 100%. The difference in positive rate between ELISA and Dot-IGSS was significant (x2 = 6.93, p < 0.01), but no statistically significant differences were found between ELISA and Dot-ELISA or between Dot-ELISA and Dot-IGSS. Paired comparison of the reacting intensities of the sera in the 3 assays showed the correlations were highly significant (p < 0.001), with r = 0.608 between Dot-IGSS and Dot-ELISA, r = 0.8194 between Dot-IGSS and ELISA and r = 0.517 between Dot-ELISA and ELISA. Hence combination of different serological assays may increase their sensitivity and specificity for detecting the anti-Toxoplasma antibodies.
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Affiliation(s)
- Y S Liu
- Xuzhou Medical College, Xuzhou, Jiangsu, PR China
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33
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Ye XP, Donnelly CA, Fu YL, Wu ZX. The non-randomness of the distribution of Trichuris trichiura and Ascaris lumbricoides eggs in faeces and the effect of stirring faecal specimens. Trop Med Int Health 1997; 2:261-4. [PMID: 9491105 DOI: 10.1046/j.1365-3156.1997.d01-259.x] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Experiments were performed to describe the distribution of Trichuris trichiura and Ascaris lumbricoides eggs in faeces and to test for the effect of stirring faecal specimens prior to sampling. For each of 5 volunteers infected with A. lumbricoides and 7 volunteers infected with T. trichiura, helminth eggs were counted in 150 samples from a single stool specimen using the Kato-Katz smear technique. No significant differences between the distribution of eggs in samples from the surface and the centre of the specimens were found. Prior to stirring, eggs were found to be aggregately distributed in four of the specimens with T. trichiura and all of the specimens with A. lumbricoides. The distributions of eggs were not significantly altered by stirring the stool prior to sampling except in the case of one volunteer infected with A. lumbricoides for whom stirring reduced variability.
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Affiliation(s)
- X P Ye
- Wellcome Trust Centre for the Epidemiology of Infectious Disease, Department of Zoology, University of Oxford, UK
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34
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Wu ZX, Tang YM, Han QD, Wang X. [Effects of inflammatory mediators on the release of CGRP from isolated mesenteric arterial bed of rat]. Sheng Li Xue Bao 1996; 48:571-6. [PMID: 9389156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The purpose of the present study was to observe whether inflammatory mediators, such as: Prostaglandin E2 (PGE2), Bradykinin (BK), Histamine (HIS), Platelet active factor (PAF) and 5-hydroxytryptamine (5-HT), directly triggered the release of CGRP from perivascular nerves in isolated rat mesenteric arterial bed. The results showed that PGE2 (1-100 mumol/L) and BK (5-10 mumol/L) caused time- and concentration-dependent CGRP release, but HIS, PAF and 5-HT did not show significant effects. Our data indicate that PGE2 and BK are the major inflammatory mediators in triggering the release of CGRP from the perivascular CGRP-containing nerve.
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Affiliation(s)
- Z X Wu
- Third Hospital, Beijing Medical University
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35
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Wang X, Wu ZX, Tang YM, Han QD. [The roles of nitric oxide and prostaglandins in the endotoxin-induced release of calcitonin gene-related peptide (CGRP) in rat mesenteric artery]. Sheng Li Xue Bao 1996; 48:217-21. [PMID: 9389177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The mechanism of endotoxin (ETX) -induced release of CGRP was studied in isolated mesenteric arterial bed. ETX (50 micrograms/ml) caused a 16-fold increase of the release of CGRP. The effect of ETX was enhanced by L-arginine (L-Arg), a substratum of nitric oxide synthase (NOS), by 41%, but inhibited by NG-nitro-L-arginine (L-NNA), an selective inhibitor of NOS, L-NNA, and methylium blue (MB), an inhibitor of guanylate cyclase, respectively by 35% and 36%. These observations suggested that the effect of ETX is, at least partially, mediated by elevation of intracellular cGMP induced by NO. When endothelial cells were removed, the above responses of L-NNA and L-Arg still existed, indicating that ETX activated neuronal, rather than endothelial, NOS. Indomethacin and ibupofen, inhibitors of cyclooxygenase, also inhibited ETX-induced CGRP release by 34% and 39% respectively. When L-NNA and indomethacin were both incubated, no additive effects were discernible. The data suggest that ETX triggers CGRP release partially through activation of NOS located in perivascular sensory nerve and increase of NO, which is followed by activation of cyclooxygenase.
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Affiliation(s)
- X Wang
- Third Hospital, Beijing Medical University
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36
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Wang X, Wu ZX, Tang YM, Han QD. [Endotoxin causes release of calcitonin gene-related peptide (CGRP) from the isolated mesenteric arterial bed in rat]. Sheng Li Xue Bao 1996; 48:37-42. [PMID: 8758688] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Our previous work has shown that CGRP is released into the circulation during endotoxin or hemorrhagic shock in animals and septic shock in patients. We have also identified the blood vessels as a major source of production of circulating CGRP in the endotoxic rat. In the present study we determined whether ETX could directly trigger release of CGRP from CGRP-containing perivascular nerves in isolated mesenteric arterial bed (MAB) of rat. The results showed that ETX caused time- and concentration (10-100 micrograms/ml) -dependent release of CGRP. ETX (50 micrograms/ml) is increased by 20 fold CGRP in perfusate 10-15 min after ETX. Characterization of CGRP in perfusates by reverse-phase HPLC showed one predominant peak which coeluted with synthetic rat CGRP. Pretreated MAB with capsaicin or ruthenium red inhibited ETX-induced release of CGRP by 90% and 65% respectively. ETX-induced CGRP release was decreased under Ca2+-free perfusion by 80%. The data suggest that ETX directly trigger the release of CGRP from capsaicin-sensitive sensory nerve innervating blood vessels. The release of CGRP is dependent on extra-cellular Ca2+ and Ca2+-induced Ca2+ release from the intracellular Ca2+ store which is sensitive to ruthenium red.
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Affiliation(s)
- X Wang
- Institute of Vascular Medicine, Third Hospital, Beijing Medical University
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37
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Abstract
Dot-immunogold-silver staining (Dot-IGSS) and Dot-ELISA were used, with Taenia solium cyst fluid antigen, to detect specific antibodies in the sera of patients with cysticercosis. All 40 confirmed cases of cysticercosis were found to be positive when tested by 2 methods. The average titer of the sera detected by Dot-IGSS was 1:27,470, which was significantly higher than that detected by Dot-ELISA. The false positive rates were 2% and 4% in 50 healthy controls for Dot-IGSS and Dot-ELISA, respectively, with a low titer of 1:20.
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Affiliation(s)
- Y S Liu
- Department of Physiology, Xuzhou Medical College, People's Republic of China
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38
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Wu ZX, Han QD, Bai Y, Wang X. [Effects of some physical and chemical factors on CGRP release from mesenteric arterial bed]. Sheng Li Xue Bao 1995; 47:573-9. [PMID: 8762448] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
We have shown that calcitonin gene-related peptide (CGRP) is released into the circulation during endotoxin or hemorrhagic shock. In the present study, it was observed that low pH, elevated levels of lactic acid, hypertonic NaCl and hypertonic sucrose caused CGRP release from isolated mesenteric arterial bed (MAB) of rat. All the responses were blocked when MAB was pretreated with capsaicin. Ruthenium red, an inhibitor of Ca(2+)-induced Ca2+ release from intracellular Ca2+ pools, significantly inhibited the release of CGRP. In Ca2+ free medium, low pH, lactic acid and hypertonic solutions became no longer capable of inducing the release of CGRP. The above results suggest that the observed release of CGRP in MAB was mediated by capsaicin-sensitive sensory nerve endings, as a result of Ca(2+)-induced Ca2+ release from the intracellular Ca2+ store which is sensitive to ruthenium red.
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Affiliation(s)
- Z X Wu
- Institute of Vascular Medicine, Beijing Medical University
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39
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Liu YS, Du WP, Wu YM, Chen YG, Zheng KY, Shi JM, Hu XZ, Li GY, You CF, Wu ZX. Application of dot-immunogold-silver staining in the diagnosis of clonorchiasis. J Trop Med Hyg 1995; 98:151-154. [PMID: 7783270] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
All 35 confirmed clonorchiasis cases showed a positive reaction in dot-immunogold-silver staining (Dot-IGSS) with a mean serum titre of 1:1656, while none of the sera from 35 normal individuals reacted. A seroepidemiological survey of middle-school students revealed a positive rate of 17.0% (142/836), and 76.1% (105/138) of the serologically positive students were egg positive in stool examination. The egg positive rates in those with antibody at levels of 1+ to 4+ were 57.1% (28/49), 75.7% (28/37), 94.7% (36/38) and 92.9% (13/14) respectively. It is believed that Dot-IGSS can be used for the clinical diagnosis and epidemiological survey of clonorchiasis.
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Affiliation(s)
- Y S Liu
- Department of Parasitology, Xuzhou Medical College, Jiangsu, China
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40
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Abstract
The population dynamic parameters of Necator americanus infections were estimated from longitudinal intensity and prevalence data from a village in south-eastern China. The theoretical predictions of a deterministic model incorporating these parameters were then compared with observed, horizontal, age-prevalence data from an infected population (N = 565), and an estimate of the basic reproduction rate (R0 = 3.7) of N. americanus was obtained. The findings indicate that populations of N. americanus might be easier to control by mass-treatment chemotherapy (eradication requiring only 63% of the population to be treated every year for 4 years) than those of Ascaris lumbricoides and Trichuris trichiura.
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Affiliation(s)
- X P Ye
- Centre for the Epidemiology of Infectious Diseases, University of Oxford, U.K
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41
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Liu YS, Du WP, Chen M, Wu ZX. Comparative study of Dot-immunogold silver staining and Dot-ELISA for the detection of serum antibodies against Wuchereria bancrofti. Southeast Asian J Trop Med Public Health 1994; 25:724-7. [PMID: 7667722] [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: 01/26/2023]
Abstract
Dot-immunogold silver staining (Dot-IGSS) and Dot-ELISA, using the soluble antigen of Brugia malayi, were employed to detect anti-Wuchereria bancrofti antibodies in 50 cases of Wuchereria bancrofti microfilaremia. The positive rates were 100% and 90% in Dot-IGSS and Dot-ELISA respectively. The average titer in the 45 positive cases was 1:184 (1:10-1:2560) for Dot-IGSS and 1:150 (1:10-1:2560) for Dot-ELISA, with 30 cases showing the same titer in both tests, 13 cases showing higher titer in Dot-IGSS than in Dot-ELISA and 2 cases in the former showing lower titers than in the latter. There was a linear relationship between the titers of antibodies detected by Dot-IGSS and by Dot-ELISA (r = 0.8443). Dot-IGSS, similar to Dot-ELISA, is easy to carry out and the result is easy to read. It is seen that Dot-IGSS is highly sensitive and specific and is practicable for immunodiagnosis and surveillance of filariasis.
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Affiliation(s)
- Y S Liu
- Department of Parasitology, Xuzhou Medical College, Jiangsu, China
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42
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Wu ZX, Du WP, Rong YW, Ji XH, Yuan SY. The use of dot-immunogold-silver staining (dot-IGSS), dot-ELISA and dot-IGSS to detect serum antibodies from clonorchiasis patients: a comparative study. Southeast Asian J Trop Med Public Health 1993; 24:677-9. [PMID: 7939939] [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
We report the use of immunogold-silver staining (IGSS), dot-ELISA and dot-IGSS methods in the study of clonorchiasis in China. These methods were employed to detect the antibody in sera from 40 clonorchiasis patients. The positive rates were 100%, 90.0% and 95.0%, respectively. When the three methods were used to examine 40 normal sera, the negative rates were 100%, 97.5% and 97.5%, respectively. These results suggest that IGSS, dot-ELISA and dot-IGSS are highly specific and sensitive in detecting anti-Clonorchis antibody in patients.
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Affiliation(s)
- Z X Wu
- Jiangsu Institute of Parasitic Diseases, Wuxi, People's Republic of China
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43
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Wu ZX. [Intravascular embolization in treatment of craniocerebral vascular diseases]. Zhonghua Wai Ke Za Zhi 1993; 31:8-12. [PMID: 8404348] [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: 01/30/2023]
Abstract
From Aug. 1986 to June 1992, 193 cases of craniocerebral vascular diseases were treated with intravascular embolization. Among these there were 52 cases of carotid-cavernous fistula (CCF), 31 intracranial aneurysms, 83 arteriovenous malformations (AVM), and 27 dural AVMs. Intravascular embolization was first used in the treatment of CCF and dural AVM. For those of non-clippable aneurysms, detachable balloon catheter was adopted, but investigation of whole brain vessels and Matas' test should be made before embolization. As to brain AVM, embolization or combination of embolization and surgery is practical in some cases. Use of IBCA glue or silk suture in embolization is depends on the anatomical feature of AVM.
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Affiliation(s)
- Z X Wu
- Beijing Neurosurgical Instiatute
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44
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Wu ZX. [Embolization treatment of carotid-cavernous fistula with balloon catheter]. Zhonghua Wai Ke Za Zhi 1993; 31:20-2. [PMID: 8404336] [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: 01/30/2023]
Abstract
Fifty-five cases of carotid-cavernous fistula (CCF) were treated with detachable balloon catheter from Oct. 1986 to Aug. 1992. Of these cases, 52 were embolized successfully with patented carotid arteries in 36. The clinical data, neurological complications and embolization methods were evaluated. We believe that intravascular embolization is the best method for treating CCF.
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Affiliation(s)
- Z X Wu
- Beijing Neurosurgical Institute
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45
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Wu ZX, Wang ZC. Treatment of traumatic carotid-cavernous fistula with detachable balloon. Chin Med J (Engl) 1990; 103:840-5. [PMID: 2125258] [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: 12/30/2022] Open
Abstract
From November 1986 to February 1989, 18 patients with traumatic carotid-cavernous fistulas were treated by means of detachable balloon, which was made by ourselves. Successful embolization was achieved in 15 patients. Draining features of the fistulas and methods of embolization were introduced. The method was compared with other methods. Selection of treatments and problems in embolization are discussed.
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Affiliation(s)
- Z X Wu
- Beijing Neurosurgical Institute
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46
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Wu ZX. [The X-ray tomography machine and its application]. Zhonghua Fang She Xue Za Zhi 1984; 18:232-4. [PMID: 6241880] [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: 01/19/2023]
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47
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Wu ZX. [Tuberculosis of clavicle: report of 5 cases (author's transl)]. Zhonghua Wai Ke Za Zhi 1981; 19:671. [PMID: 7341142] [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: 01/24/2023]
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48
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Wu ZX. [Ventriculo-lymphatic shunt (author's transl)]. Zhonghua Wai Ke Za Zhi 1981; 19:661-3. [PMID: 7341140] [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: 01/24/2023]
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