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Zeng YL, Wang SD, Li YR, Xue WS, Wang T, Tang YT, Zheng H, Chen ZX, Lan JQ, Yan J. [Analysis of factors influencing the success rate of organoid culture in 1231 cases of colorectal cancer]. Zhonghua Wei Chang Wai Ke Za Zhi 2023; 26:780-786. [PMID: 37574295 DOI: 10.3760/cma.j.cn441530-20221128-00499] [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: 08/15/2023]
Abstract
Objective: To investigate the risk factors for organoid culture failure in colorectal cancer. Methods: This was a retrospective observational study. Tumor specimens were obtained from 1130 patients with colorectal cancer who had undergone surgery or biopsy and had no other concurrent malignancies at Nanfang Hospital of Southern Medical University from December 2021 to November 2022. Organoid culture was performed on 1231 tumor tissue samples. Univariate analysis and multivariate logistic regression were used to analyze the factors that might have influenced the rate of successful organoid culture of colorectal cancer tissue samples. Results: The median (range) duration of organoid culture was 7 (3-12) days. The overall rate of successful culture was 76.3% (939/1231). The rate of successful organoid cultures varied according to the sampling site, malignant ascites having the highest success rate (96.4%, 27/28), followed by liver metastases (83.1%, 54/65), lung metastases (8/10), primary tumors (76.0%, 816/1074), omental metastases (10/14), peritoneal metastases (61.5%, 16/26), ovarian metastases (3/5), and lymph node metastases (5/9). The difference in rates of successful organoid culture between primary tumors and malignant ascites was statistically significant (P=0.012), whereas none of the other rates of successful organoid culture success differed significantly (all P>0.05). The rate of successful organoid culture was 96.4% (27/28) for malignant ascites obtained by abdominal puncture, 76.5% (864/1130) for surgical specimens, and 65.8% (48/73) for endoscopic biopsies; these differences are statistically significant (χ2=10.773, P=0.005). The rate of successful organoid culture was 62.5% (40/64) in the neoadjuvant chemoradiotherapy group, which is significantly lower than in the non-adjuvant (76.9%, 787/1023) and chemotherapy groups (77.8%, 112/144) (χ2=7.134, P=0.028). Multivariate logistic regression analysis revealed that endoscopic biopsy (OR=0.557, 95%CI: 0.335-0.924, P=0.024) and neoadjuvant chemoradiotherapy (OR=0.483, 95%CI: 0.285-0.820, P=0.007) were independent risk factors for failure of organoid culture of colorectal cancer samples. Malignant ascites (OR=8.537, 95%CI:1.154-63.131,P=0.036) and abdominal puncture (OR=8.294, 95% CI: 1.112-61.882, P=0.039) were identified as independent protective factors. Conclusions: The rate of successful organoid culture was influenced by the sampling site, sampling method, and chemoradiotherapy. The rate of successful organoid culture was lower for endoscopic biopsies and in patients receiving preoperative neoadjuvant chemoradiotherapy, and higher for malignant ascites. We consider that culture of malignant ascites is preferable when peritoneal metastases are suspected.
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Affiliation(s)
- Y L Zeng
- Department of General Surgery, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China Department of Oncology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - S D Wang
- Department of General Surgery, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - Y R Li
- Department of General Surgery, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - W S Xue
- Department of General Surgery, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - T Wang
- Department of General Surgery, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - Y T Tang
- Department of General Surgery, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - H Zheng
- Department of Oncology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - Z X Chen
- Guangdong Research Center of Organoid Engineering and Technology, Guangzhou 510535, China
| | - J Q Lan
- Guangdong Research Center of Organoid Engineering and Technology, Guangzhou 510535, China
| | - J Yan
- Department of General Surgery, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China Department of Gastrointestinal Surgery, Shenzhen People' s Hospital, Second Clinical Medical College of Jinan University, First Affiliated Hospital of Southern University of Science and Technology, Shenzhen 518020, China
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Li XC, Chen ZX, Li D, Liu WZ, Meng M. Chemical and mechanical stability of an ion-exchanged lithium disilicate glass in artificial saliva. J Mech Behav Biomed Mater 2023; 137:105563. [PMID: 36375276 DOI: 10.1016/j.jmbbm.2022.105563] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Revised: 11/03/2022] [Accepted: 11/06/2022] [Indexed: 11/11/2022]
Abstract
Multi-component lithium disilicate (LD) glasses were ion-exchanged in a pure or mixed nitrate salt bath. The surface morphologies, mechanical properties, chemical stability and ion leaching of ion-exchanged LD glasses before and after storage in artificial saliva for 21 days were investigated. It can be found that chemical stability of ion-exchanged LD glass was temperature-dependent. The residual compressive stress induced by ion-exchange increased the chemical potential of alkali ions in glass, and the ion-exchanged LD glass, especially 235 °C/64 h group, chemical stability in artificial saliva for 21 days were deteriorated. Back-exchange treatment could relax the stress on the outermost layer of the ion-exchanged LD glass without deteriorating its strengthening effect, and back-exchanged LD glass presented good chemical and mechanical stability in artificial saliva. The results might help to enhance the service stability of ion-exchanged LD glass-ceramics in the oral condition.
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Affiliation(s)
- X C Li
- Shaanxi Key Laboratory of Biomedical Metallic Materials, Northwest Institute for Non-ferrous Metal Research, Xi'an, 710016, China
| | - Z X Chen
- State Key Laboratory for Manufacturing Systems Engineering, School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an, 710049, China
| | - D Li
- School of Science, Xi'an University of Posts and Telecommunications, Xi'an, 710121, China
| | - W Z Liu
- Shaanxi Key Laboratory of Biomedical Metallic Materials, Northwest Institute for Non-ferrous Metal Research, Xi'an, 710016, China
| | - M Meng
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, Department of Prosthodontics, School of Stomatology, Fourth Military Medical University, Xi'an, 710032, China.
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Li FP, Zhang MX, Wang LJ, Zhu XL, Sun LX, Chen ZX, Chen WY, Liu DY, Li HP, Jiang YY, Tung TH. Design and Implementation of Taizhou Integrated Prostate Screening. Am J Mens Health 2022; 16:15579883221138192. [PMID: 36412060 PMCID: PMC9703546 DOI: 10.1177/15579883221138192] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
A community-based prostate cancer screening program was conducted to assess the morbidity and associated factors for prostate cancer among the subpopulation of men aged ≥50 years in Taizhou, China. Taizhou Integrated Prostate Screening (TIPS) is a large, observational, population-based study of prostate cancer screening data based on serum prostate-specific antigen (PSA) concentrations. A pilot census of all male residents aged 50 years or older was conducted in Luqiao District, one of the field sites of the TIPS cohort in the city of Taizhou, Zhejiang. The interviewer-administered questionnaire evaluated demographic characteristics and environmental exposure factors. A total of 1,806 out of 3,516 participants completed the questionnaire. The overall prevalence of PSA ≥4 ng/mL was 11.5%, and included participants at low risk (9.2%), moderate risk (1.7%), and high risk (0.6%). Participants aged 60-69, 70-79, and ≥80 years had a 2.7-fold, 4.2-fold, and 6.5-fold higher risk of elevated PSA, respectively, in comparison with those aged 50 to 59 years (p < .001). Eighteen patients were diagnosed with prostate cancer, of whom 11 (61.1%) underwent radical surgery. This community-based PSA screening program indicated the results for early detection of prostate cancer among men aged ≥50 years. Early screening and appropriate clinical therapy for the management of prostate cancer are essential in this subpopulation.
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Affiliation(s)
- Fei-Ping Li
- Department of Urology, Taizhou Hospital of Zhejiang Province Affiliated to Wenzhou Medical University, Enze Hospital, Taizhou Enze Medical Center (Group), Taizhou, China
| | - Mei-Xian Zhang
- Evidence-Based Medicine Center, Taizhou Hospital of Zhejiang Province Affiliated to Wenzhou Medical University, Linhai, China
| | - Li-Jun Wang
- Department of Urology, Taizhou Hospital of Zhejiang Province Affiliated to Wenzhou Medical University, Enze Hospital, Taizhou Enze Medical Center (Group), Taizhou, China
| | - Xiao-Liang Zhu
- Department of Urology, Taizhou Hospital of Zhejiang Province Affiliated to Wenzhou Medical University, Enze Hospital, Taizhou Enze Medical Center (Group), Taizhou, China
| | - Liang-Xue Sun
- Department of Urology, Taizhou Hospital of Zhejiang Province Affiliated to Wenzhou Medical University, Enze Hospital, Taizhou Enze Medical Center (Group), Taizhou, China
| | - Zhi-Xia Chen
- Department of Urology, Taizhou Hospital of Zhejiang Province Affiliated to Wenzhou Medical University, Enze Hospital, Taizhou Enze Medical Center (Group), Taizhou, China
| | - Wei-Ying Chen
- Department of Urology, Taizhou Hospital of Zhejiang Province Affiliated to Wenzhou Medical University, Enze Hospital, Taizhou Enze Medical Center (Group), Taizhou, China
| | - Ding-Yi Liu
- Department of Urology, Taizhou Hospital of Zhejiang Province Affiliated to Wenzhou Medical University, Enze Hospital, Taizhou Enze Medical Center (Group), Taizhou, China
| | - Hai-Ping Li
- Department of Urology, Taizhou Hospital of Zhejiang Province Affiliated to Wenzhou Medical University, Enze Hospital, Taizhou Enze Medical Center (Group), Taizhou, China
| | - Yu-Ying Jiang
- Department of Urology, Taizhou Hospital of Zhejiang Province Affiliated to Wenzhou Medical University, Enze Hospital, Taizhou Enze Medical Center (Group), Taizhou, China
| | - Tao-Hsin Tung
- Evidence-Based Medicine Center, Taizhou Hospital of Zhejiang Province Affiliated to Wenzhou Medical University, Linhai, China,Tao-Hsin Tung, Evidence-Based Medicine Center, Taizhou Hospital of Zhejiang Province Affiliated to Wenzhou Medical University, Linhai, Zhejiang 317000, China.
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Wang HY, Chen ZX. A moderated-mediation analysis of performance appraisal politics perception and counterproductive work behavior. Front Psychol 2022; 13:928923. [DOI: 10.3389/fpsyg.2022.928923] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Accepted: 10/03/2022] [Indexed: 11/13/2022] Open
Abstract
Politics has become a common element in the performance appraisal process, and as decision recipients in this process, those appraised tend to be more sensitive to performance appraisal politics. This paper examines the mechanisms by which performance appraisal politics perception (PAPP) affects counterproductive work behavior (CWB) from the perspective of those appraised. The mediating effect of perceived organizational justice (POJ) and the moderating effect of political skill (PS) are incorporated into a parsimonious moderated-mediation model. A quantitative research approach is employed with survey data from 460 employees of large and medium-sized enterprises in Hubei Province (China), and structural equation modeling (SEM) and bootstrap analysis are used to test the proposed hypothesized relationships. The findings demonstrate that PAPP has a positive impact on CWB, and POJ partly mediates the relationship between PAPP and CWB. The results also reveal that individual PS moderates the positive correlation between PAPP and CWB. The academic and practical implications of these findings, as well as limitations and suggestions for future research, are also discussed.
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Jia HQ, Chen ZX, Wang CQ. [Pathological diagnosis of rare and salivary gland-type tumors of breast]. Zhonghua Bing Li Xue Za Zhi 2022; 51:908-913. [PMID: 36097915 DOI: 10.3760/cma.j.cn112151-20220508-00384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Affiliation(s)
- H Q Jia
- Department of Pathology, the Affiliated Hospital of Qingdao University, Department of Pathology, School of Basic Medicine, Qingdao University, Qingdao 266000, China
| | - Z X Chen
- Department of Pathology, the Affiliated Hospital of Qingdao University, Department of Pathology, School of Basic Medicine, Qingdao University, Qingdao 266000, China
| | - C Q Wang
- Department of Pathology, the Affiliated Hospital of Qingdao University, Department of Pathology, School of Basic Medicine, Qingdao University, Qingdao 266000, China
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Wang HY, Chen ZX. Corporate social responsibility and job applicant attraction: A moderated-mediation model. PLoS One 2022; 17:e0260125. [PMID: 35239669 PMCID: PMC8893664 DOI: 10.1371/journal.pone.0260125] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Accepted: 11/03/2021] [Indexed: 12/01/2022] Open
Abstract
Based on the social identity theory, this study investigates the mediation and moderation mechanism of CSR on job applicant attraction. A total of 395 job seekers are recruited to join in the experiment survey. The results indicate that job seekers’ perceptions of CSR positively relate to job applicant attraction, employer reputation and expected pride mediate this relationship, respectively, and the serial mediating role of employer reputation and then expected pride in the relationship between CSR and job applicant attraction. Additionally, the findings show that job applicants’ materialism orientation plays a moderating role in the indirect effect of CSR on job applicant attraction via expected pride, but the moderating effect of job seekers’ materialism orientation in the indirect effect of CSR on job applicant attraction via employer reputation is not statistically significant. These findings enrich the new culture-driven evidence on the impacting mechanism of CSR on job applicant’s attitude and provide valuable insight into how CSR motivates job applicant attraction.
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Affiliation(s)
- Hong-yan Wang
- College of Economics and Management, Hubei Polytechnic University, Huangshi, Hubei, People’s Republic of China
| | - Zhi-Xia Chen
- College of Public Administration, Huazhong University of Science and Technology, Wuhan, Hubei, People’s Republic of China
- * E-mail:
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Zhu QF, Chen WK, Chen ZX, Wu ZG. [Influence of testicular microlithiasis on male fertility: An update]. Zhonghua Nan Ke Xue 2021; 27:1119-1123. [PMID: 37454323] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 07/18/2023]
Abstract
With the increasing awareness of men's health, more and more clinical studies are reported on the relationship of testicular microlithiasis (TM) with male infertility. TM is a relatively rare disease characterized by multiple microcalcifications (<3 mm) in the seminiferous tubules of the testis. This review summarizes the findings in the studies of the diagnosis, epidemiology, correlation with male fertility, treatment, and follow-up of TM in recent years. Many researches show that TM has a certain correlation with the decline of male fertility, which, however, is not identically agreed on at home and abroad. As for the treatment of TM complicated with male infertility, there is still a lack of effective and reliable drugs and strategies and a need for many basic and clinical studies.
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Affiliation(s)
- Qing-Feng Zhu
- Department of Urology, Lishui Central Hospital, Lishui, Zhejiang 323020, China
| | - Wei-Kang Chen
- Department of Urology, The First Hospital Affiliated to Wenzhou Medical University, Wenzhou, Zhejiang 325015, China
| | - Zhi-Xia Chen
- Department of Urology, Taizhou Enze Medical Center, Taizhou Zhejiang 318053, China
| | - Zhi-Gang Wu
- Reproductive Health Research Center, Health Assessment Center of Wenzhou Medical University, Wenzhou, Zhejiang 325035, China
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Song JH, Chen ZX, Guo JY, Xie ZB, Du J, Wang HL, Cui AL, Zhu Z, Mao NY, Xu WW, Zhang Y. [Genotype and genetic characteristics of human respiratory syncytial virus circulating in Quanzhou, 2018-2019]. Zhonghua Yi Xue Za Zhi 2021; 101:1695-1699. [PMID: 34126719 DOI: 10.3760/cma.j.cn112137-20210202-00326] [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 study the prevalence and genetic characteristics of human respiratory syncytial virus (HRSV) in Quanzhou city, from 2018 to 2019. Methods: A total of 141 throat swabs were collected from children patients of lower respiratory tract infection in Quanzhou children Hospital, Fujian Province from November 2018 to May 2019. RT-PCR was used to amplify the 3 'end of G gene HRSV. Sequencer 5.0 and MEGA5.05 softwares were used for sequence editing, phylogenetic tree construction and genotyping analysis. Results: Twenty-five samples were positive for HRSV. Seventeen samples succeeded to obtain the target gene, including 13 of HRSVA and 4 of HRSVB. Two genotypes were identified: ON1 genotype (13 samples, HRSVA) and BA9 genotype (4 samples, HRSVB). Five strains of ON1 genotype sequences were clustered with the ON1 sequences prevalent in Beijing, Changchun and Zhejiang from 2012 to 2015 (cluster1); one strain (FJ19-02) was clustered with the sequences of ON1 genotype circulating in many regions of China from 2012 to 2015 (cluster2); Seven strains were clustered independently (cluster FJ). FJ18-02, FJ19-14 and FJ19-15 of HRSVB were clustered with the BA9 genotype sequences prevalent in Changchun, Jilin Province in 2015, while FJ19-13 was closely related to the BA9 genotype sequences prevalent in Guangzhou and Zhejiang Province in 2013. Both the ON1 and BA9 genotypes showed variations of nucleotide and amino acid in 72 and 60 insertion segments. Amino acid mutation (H266L) only occurred among the sequence of cluster-FJ, and the mutations of H261Q and Q265L only appeared in strain FJ19-13. Conclusion: BA9 and ON1 genotypes were prevalent in Quanzhou city, from 2018 to 2019. Cluster-FJ was a newly discovered independent transmission chain, which may continue to circulate in local Quanzhou area.
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Affiliation(s)
- J H Song
- WHO WPRO Regional Reference Measles/Rubella Laboratory National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, 102206, China
| | - Z X Chen
- Department of Critical Care Medicine, Quanzhou Children's Hospital, Quanzhou 362000, China
| | - J Y Guo
- WHO WPRO Regional Reference Measles/Rubella Laboratory National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, 102206, China
| | - Z B Xie
- WHO WPRO Regional Reference Measles/Rubella Laboratory National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, 102206, China
| | - J Du
- WHO WPRO Regional Reference Measles/Rubella Laboratory National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, 102206, China
| | - H L Wang
- WHO WPRO Regional Reference Measles/Rubella Laboratory National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, 102206, China
| | - A L Cui
- WHO WPRO Regional Reference Measles/Rubella Laboratory National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, 102206, China
| | - Z Zhu
- WHO WPRO Regional Reference Measles/Rubella Laboratory National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, 102206, China
| | - N Y Mao
- WHO WPRO Regional Reference Measles/Rubella Laboratory National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, 102206, China
| | - W W Xu
- WHO WPRO Regional Reference Measles/Rubella Laboratory National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, 102206, China
| | - Y Zhang
- WHO WPRO Regional Reference Measles/Rubella Laboratory National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, 102206, China
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Cui D, Chen ZX, Liu LT, Liu DG, Chen L. [Application of cell transfer technique in the diagnosis of fine needle aspiration cytology]. Zhonghua Bing Li Xue Za Zhi 2021; 50:615-619. [PMID: 34078049 DOI: 10.3760/cma.j.cn112151-20210105-00019] [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 study the application of cell transfer technology to solve the problem of the limited number of fine needle aspiration cytology (FNAC) smears for various immunocytochemistry (ICC) staining and other auxiliary tests, and to enhance accurate cytological diagnosis. Methods: Thirty-four cases of FNAC smears from January 2020 to April 2020 in the Department of Pathology of Beijing Hospital were collected for investigation of the cell transfer technique. The materials in the most cell smear were divided and transferred to several glass slides. After de-staining, the recipient slides were stained with EnVision ICC. The technique was validated by comparing the consistency of the ICC of transferred cell smears and the corresponding immunohistochemical (IHC) staining on biopsies. Results: There were a total of 180 cell transfer slides from 34 cases, of which 174 had the same cell morphology, size and structure as the original smears, with the success rate of cell transfer of 96.7% (174/180). Totally 174 ICC stains were performed on the successfully transferred cell smears, of which 153 smears had available corresponding IHC staining of histologic specimens. Of these, 148 showed concordance between ICC staining and the IHC staining. Cells were successfully transferred in 96.7 % (148/153) of the cell sheets, keeping the same morphology and structure as compared to their original smears. The diagnosis of all 34 FNAC cases was the same to that of their corresponding pathology on biopsies with 100 % concordance. Conclusions: The cell transfer technique is a simple and effective way to make full use of diagnostic cells on a cell smear, and is valuable for accurate cytological diagnosis.
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Affiliation(s)
- D Cui
- Department of Pathology,Beijing Hospital,National Center of Gerontology;Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Z X Chen
- Department of Pathology,Beijing Hospital,National Center of Gerontology;Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - L T Liu
- Department of Pathology,Beijing Hospital,National Center of Gerontology;Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - D G Liu
- Department of Pathology,Beijing Hospital,National Center of Gerontology;Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - L Chen
- Department of Pathology,Beijing Hospital,National Center of Gerontology;Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing 100730, China
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Chen WK, Yu DD, Chen ZX, Li PF, Cai J, Liu YP, Wu ZG. Transurethral seminal vesiculoscopy for intractable hematospermia: experience from 144 patients. BMC Urol 2021; 21:48. [PMID: 33773582 PMCID: PMC8005245 DOI: 10.1186/s12894-021-00817-4] [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] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2021] [Accepted: 03/17/2021] [Indexed: 11/13/2022] Open
Abstract
Purpose to describe the methodology of transurethral seminal vesiculoscopy and the anatomy of the area of the verumontanum, and to determine the safety of this procedure, especially in terms of postoperative complications. Methods This retrospective observational study enrolled 144 patients with intractable hematospermia from May 2011 and August 2019. A 4.5/6.5-Fr vesiculoscope was inserted into the seminal vesicle to deal with the positive findings. The solution of quinolones was used to rinse each seminal vesicle. Results In this study, Transurethral seminal vesiculoscopy was successfully performed in 139 patients (96.53%). Hematospermia was alleviated or disappeared in 116 (80.56%) patients by less than half a year after surgery. Common intraoperative manifestations were hemorrhage, stones, utricle polyps and cysts. The surgical approach in our study were categorized into four types, including 24 (16.7%), 73 (50.7%), 42 (29.2%), and 5 (3.5%) cases in Type A (natural opening of the ejaculatory duct), B (trans-duct fenestration), C (trans-utricle fenestration), and D (not founded), respectively. Sexual function change was recorded in 12 patients of 111 patients, all by the method of trans-utricle fenestration, including 8 (7.21%), 3 (2.70%), and 1 (0.90%) patients in shorter intravaginal ejaculatory latency time, worse erection hardness and loss of orgasm, respectively. Conclusion Transurethral seminal vesiculoscopy is an effective and safe procedure for the management of hematospermia. The anatomy of the distal seminal tract should be understood more deeply and Wu’method (uncover-curtain method) needs to be promoted to verify its universality and safety. Besides, the complications of the function dysfunction should be discussed in the future in multi-center clinical trials. Supplementary Information The online version contains supplementary material available at 10.1186/s12894-021-00817-4.
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Affiliation(s)
- Wei-Kang Chen
- Department of Andrology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325000, Zhejiang, China
| | - Dong-Dong Yu
- Department of Andrology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325000, Zhejiang, China
| | - Zhi-Xia Chen
- Department of Andrology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325000, Zhejiang, China
| | - Peng-Fei Li
- Department of Andrology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325000, Zhejiang, China
| | - Jian Cai
- Department of Andrology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325000, Zhejiang, China
| | - Yu-Peng Liu
- School of Public Administration and Health, Wenzhou Medical University, Wenzhou, 325000, Zhejiang, China
| | - Zhi-Gang Wu
- Department of Andrology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325000, Zhejiang, China. .,Reproductive Health Research Center, Health Assessment Center of Wenzhou Medical University, Wenzhou, 325000, Zhejiang, China.
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Kong L, Chen ZX, Qin YQ, Xia HW, Long JQ, Qin QH, Song YM, Wei HW. [Occurrence and related factors of preterm birth in Guangxi Zhuang Autonomous Region during 2017-2019]. Zhonghua Yi Xue Za Zhi 2020; 100:3338-3341. [PMID: 33202498 DOI: 10.3760/cma.j.cn112137-20200804-02276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the incidence of preterm birth in Guangxi Zhuang Autonomous Region and explore the related factors and their combined effects. Methods: The study subjects were women giving birth to live babies at the monitoring points of critical maternal hospital monitoring system in Guangxi Zhuang Autonomous Region from January 1, 2017 to December 31, 2019. The data of general characteristics (age and marital status), pregnancies (parity, number of previous cesarean delivery, the number of prenatal check and number of fetuses in this pregnancy) and disease conditions (placenta previa, placental abruption, hypertension, diabetes, anemia, and heart disease) were collected, and the incidence of preterm birth were calculated according to the definition of preterm birth set by WHO and China, respectively. Logistic regression model was used to explore the factors associated with premature birth and their combined effects. Results: According to definitions of WHO and China, the cumulative incidence of preterm birth in Guangxi from 2017 to 2019 was 7.45% (16 819/225 727) and 7.34% (16 559/225 727), respectively. Advanced age [≤34 years old as reference, OR (95%CI) of 35-39 and ≥40 years old were 1.36 (1.30-1.42) and 1.61 (1.50-1.74), respectively], unmarried (including divorced or widowed) [OR (95%CI): 1.28 (1.17-1.40)], primiparae [OR (95%CI): 1.34 (1.29-1.40)], previous cesarean section [no previous cesarean section as reference, OR (95%CI) of 1 and ≥2 times of previous cesarean section were 1.30 (1.24-1.36) and 1.85 (1.65-2.08), respectively], antenatal examination<8 [OR (95%CI): 2.72 (2.62-2.81)], multiple pregnancies [OR (95%CI): 15.00 (14.01-16.06)], placenta previa [OR (95%CI): 6.90 (6.35-7.50)], placental abruption [OR (95%CI): 8.18 (7.36-9.10)], gestational hypertension [OR (95%CI): 2.29 (2.17-2.42)], gestational diabetes mellitus [OR (95%CI): 1.43 (1.37-1.49)], anemia [OR (95%CI): 1.10 (1.07-1.14)], and heart diseases [OR (95%CI): 2.98(2.43-3.65)] were all positively correlated with preterm birth. The risk of preterm birth in pregnant women exposed to 1, 2, 3, 4, 5, 6 and ≥7 preterm birth related factors was 1.51, 2.29, 4.49, 9.69, 20.87, 46.88 and 192.11 times that of non-exposed women, respectively (all P values<0.001). Conclusion: Preterm birth is associated with maternal general characteristics, pregnancy and disease status, and the combined effect of preterm birth related factors significantly increases the risk of preterm birth.
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Affiliation(s)
- L Kong
- Department of Obstetrics, Maternal and Child Health Hospital of Guangxi Zhuang Autonomous Region, Nanning 530003, China
| | - Z X Chen
- Guangxi Center of Healthcare Quality Management in Obstetrics, Maternal and Child Health Hospital of Guangxi Zhuang Autonomous Region, Nanning 530003, China
| | - Y Q Qin
- Department of Obstetrics, Maternal and Child Health Hospital of Guangxi Zhuang Autonomous Region, Nanning 530003, China
| | - H W Xia
- Department of Obstetrics, Maternal and Child Health Hospital of Guangxi Zhuang Autonomous Region, Nanning 530003, China
| | - J Q Long
- Department of Obstetrics, Maternal and Child Health Hospital of Guangxi Zhuang Autonomous Region, Nanning 530003, China
| | - Q H Qin
- Maternal Health Care Department, Maternal and Child Health Hospital of Guangxi Zhuang Autonomous Region, Nanning 530003, China
| | - Y M Song
- Maternal Health Care Department, Maternal and Child Health Hospital of Guangxi Zhuang Autonomous Region, Nanning 530003, China
| | - H W Wei
- Department of Obstetrics, Maternal and Child Health Hospital of Guangxi Zhuang Autonomous Region, Nanning 530003, China
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Li D, Chen ZX, Zhang YM, Li XC, Meng M, He L, Zhang ZZ. Improved reliability of mechanical behavior for a thermal tempered lithium disilicate glass-ceramic by regulating the cooling rate. J Mech Behav Biomed Mater 2020; 114:104191. [PMID: 33254008 DOI: 10.1016/j.jmbbm.2020.104191] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Revised: 10/26/2020] [Accepted: 10/27/2020] [Indexed: 10/23/2022]
Abstract
Traditional thermal tempering was applied to lithium disilicate (LD) glass-ceramic specimens with bar-like and disc-like shapes. The tempering process was conducted by heating the specimens to a temperature below the dynamic softening point, and then rapid cooling in silicone oil with different temperatures ranging from room-temperature to 300 °C to regulate the cooling rate. Effect of the oil-temperature on mechanical behavior of the tempered glass-ceramic was investigated. For the tempering at the lower oil-temperature (e.g., at room-temperature), it was found that the LD glass-ceramic specimens with both the bar-like and disc-like shapes could be remarkably strengthen and toughen, however, obvious anisotropy in fracture toughness was displayed by the specimens with the bar-like shape. With increasing the oil-temperature up to 250 °C, the mechanical anisotropy of the bar-like specimens could be significantly alleviated without much loss of the strengthening effect. The results can provide references for improving reliability of mechanical behavior for the tempered LD glass-ceramic by regulating the cooling condition according to specimen geometry.
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Affiliation(s)
- D Li
- School of Science, Xi'an University of Posts and Telecommunications, Xi'an, 710121, China
| | - Z X Chen
- State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an, 710049, China
| | - Y M Zhang
- School of Science, Xi'an University of Posts and Telecommunications, Xi'an, 710121, China
| | - X C Li
- State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, 710049, China
| | - M Meng
- State Key Laboratory of Military Stomatology, Department of Prosthodontics, School of Stomatology, Fourth Military Medical University, Xi'an, 710032, China
| | - L He
- State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, 710049, China.
| | - Z Z Zhang
- State Key Laboratory of Military Stomatology, Department of Prosthodontics, School of Stomatology, Fourth Military Medical University, Xi'an, 710032, China.
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Wang S, Ruan WQ, Yu Z, Zhao X, Chen ZX, Li Q. Validity of presepsin for the diagnosis and prognosis of sepsis in elderly patients admitted to the Intensive Care Unit. Minerva Anestesiol 2020; 86:1170-1179. [DOI: 10.23736/s0375-9393.20.13661-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Hong PC, Ou Q, Pan MX, Chen BX, Chen ZX, Hong ZG, Cheng YL. [Investigation on the awareness of snoring hazard and prevalence of obstructive sleep apnea among civil servants]. Zhonghua Jie He He Hu Xi Za Zhi 2020; 43:553-556. [PMID: 32629553 DOI: 10.3760/cma.j.cn112147-20191013-00682] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Objective: To investigate the awareness of snoring hazard and prevalence of obstructive sleep apnea (OSA) among civil servants. Methods: A cross-sectional survey was conducted to investigate the awareness of snoring hazards among in-service civil servants who had annual medical examination in a Guangdong provincial institution from September to November 2017. The high-risk group for OSA was screened and diagnosed by sleep monitoring. Results: 1 036 of 1 241 civil servants were enrolled in the study for integral data. 60.1% (623/1 036) of the subjects realized that snoring was harmful to health. The most common source to develop OSA awareness was network (59.6%, 371/623), followed by television (48.0%), relatives and friends (46.6%), newspaper (44.5%) and radio (18.9%). The awareness rate of snoring consequences was as follows: decreased sleep quality (71.9%, 448/623), sudden death (52.2%), daytime sleepiness (44.3%), cardiovascular and cerebrovascular diseases (42.9%), hypertension (24.4%) and sexual dysfunction (16.7%). 22.0% (228 / 1 036) of the cases were classified into high-risk OSA. The prevalence of OSA among high-risk group was 46.05%(105/228)and only 0.9% (2/228) of them had been diagnosed with OSA. Conclusion: Civil servants had awareness of snoring hazard to a certain extent. Among civil servants classified into high-risk OSA, the OSA perveance was high but the rate of diagnosis and treatment was very low.
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Affiliation(s)
- P C Hong
- Sleep Center, Department of Pulmonary and Critical Care Medicine, Guangdong Provincial People's Hospital/Guangdong Academy of Medical Sciences/Guangdong Provincial Geriatrics Institute, Guangzhou 510080, China
| | - Q Ou
- Sleep Center, Department of Pulmonary and Critical Care Medicine, Guangdong Provincial People's Hospital/Guangdong Academy of Medical Sciences/Guangdong Provincial Geriatrics Institute, Guangzhou 510080, China
| | - M X Pan
- Sleep Center, Department of Pulmonary and Critical Care Medicine, Guangdong Provincial People's Hospital/Guangdong Academy of Medical Sciences/Guangdong Provincial Geriatrics Institute, Guangzhou 510080, China
| | - B X Chen
- Sleep Medicine Center, Shantou University Medical College, Shantou 515000, China
| | - Z X Chen
- Sleep Center, Department of Pulmonary and Critical Care Medicine, Guangdong Provincial People's Hospital/Guangdong Academy of Medical Sciences/Guangdong Provincial Geriatrics Institute, Guangzhou 510080, China
| | - Z G Hong
- Sleep Center, Department of Pulmonary and Critical Care Medicine, Guangdong Provincial People's Hospital/Guangdong Academy of Medical Sciences/Guangdong Provincial Geriatrics Institute, Guangzhou 510080, China
| | - Y L Cheng
- Sleep Center, Department of Pulmonary and Critical Care Medicine, Guangdong Provincial People's Hospital/Guangdong Academy of Medical Sciences/Guangdong Provincial Geriatrics Institute, Guangzhou 510080, China
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Chen R, Li MC, Zhao LL, Zhao XQ, Liu HC, Liu ZG, Lu Y, Deng YL, Chen ZX, Wan KL, Yuan XQ. [Analysis on drug sensitivity spectrum of 167 multidrug-resistant Mycobacterium tuberculosis in China]. Zhonghua Liu Xing Bing Xue Za Zhi 2020; 41:764-769. [PMID: 32447922 DOI: 10.3760/cma.j.cn112338-20191121-00823] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the drugs-sensitivity spectrum of multidrug-resistant tuberculosis (MDR-TB) in China and provide a scientific evidence for the drug selection in clinical therapy and the control of MDR-TB. Methods: A total of 167 strains of MDR-TB were included in this study. Every strain was genotyped by lysX gene sequencing and their sensitivity to 13 different anti-TB drugs was tested by using MicroDST(TM) and BACTEC(TM) MGIT 960(TM) liquid-culturing method. The association between drug resistance and genotypes as well as cross drug resistance was also analyzed. The results were analyzed by means of the comparison of enumeration data between two groups with χ(2) test. Results: The overall resistance rate of 167 MDR-TB strains to 11 anti-TB drugs, except isoniazide and rifampicin, was 95.81%, the rates of pre-extensive drug-resistance (pre-XDR) and extensive drug-resistance were 31.14%(52/167) and 6.59% (11/167), respectively. The streptomycin resistance rate of Beijing genotypes was significantly higher than that of the non-Beijing genotypes ( χ(2)=30.682, P<0.05), while the pre-XDR proportion in Beijing genotypes was lower than that in non-Beijing genotypes (χ(2)=5.332, P<0.05). The resistance rates of Ofloxacin and Pyrazinamide in the modern Beijing genotype were significantly higher than those in classical ones (χ(2)=4.105 and χ(2)=3.912, P<0.05). In addition, the cross-resistance rate to rifampicin and rifabutin was 86.23%. A significant difference in drug-resistance rate to rifabutin was seen among groups with different levels of rifampicin resistance (χ(2)=45.912, P<0.05). There was positive correlation not only between ofloxac resistance and moxifloxac resistance, but also between amikacin resistance and kanamycin resistance, with the coefficient of 0.87 and 0.91, respectively. Conclusions: In this study, we observed that there were high incidences of the resistance to 11 anti-TB drugs in 167 clinical MDR-TB strains and the cross resistance phenomena between drugs of the same type were quite serious. The majority of MDR-TB strains belonged to Beijing genotype, which was highly associated with streptomycin resistance.
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Affiliation(s)
- R Chen
- School of Public Health, University of South China, Hengyang 421001, China; State Key Laboratory for Infectious Diseases Prevention and Control, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 102206, China
| | - M C Li
- State Key Laboratory for Infectious Diseases Prevention and Control, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 102206, China
| | - L L Zhao
- State Key Laboratory for Infectious Diseases Prevention and Control, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 102206, China
| | - X Q Zhao
- State Key Laboratory for Infectious Diseases Prevention and Control, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 102206, China
| | - H C Liu
- State Key Laboratory for Infectious Diseases Prevention and Control, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 102206, China
| | - Z G Liu
- State Key Laboratory for Infectious Diseases Prevention and Control, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 102206, China
| | - Y Lu
- School of Laboratory Medicine and Life Science, Wenzhou Medical University, Wenzhou 325035, China
| | - Y L Deng
- School of Public Health, University of South China, Hengyang 421001, China; State Key Laboratory for Infectious Diseases Prevention and Control, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 102206, China
| | - Z X Chen
- School of Public Health, University of South China, Hengyang 421001, China; State Key Laboratory for Infectious Diseases Prevention and Control, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 102206, China
| | - K L Wan
- State Key Laboratory for Infectious Diseases Prevention and Control, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 102206, China
| | - X Q Yuan
- School of Public Health, University of South China, Hengyang 421001, China
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Zhang WH, Yang K, Chen XZ, Liu K, Chen XL, Zhao LY, Zhang B, Chen ZX, Chen JP, Zhou ZG, Hu JK. [Effect of standardized surgical treatment and multidisciplinary treatment strategy on the prognosis of gastric cancer patients: report of a single-center cohort study]. Zhonghua Wei Chang Wai Ke Za Zhi 2020; 23:396-404. [PMID: 32306609 DOI: 10.3760/cma.j.cn.441530-20200224-00086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Objective: To explore the effect of standardized surgical treatment and multidisciplinary treatment strategy on the treatment outcomes of gastric cancer patients. Methods: A single-center cohort study was carried out. Clinicopathological and long-term follow up data of primary gastric cancer patients were retrieved from the database of Surgical Gastric Cancer Patient Registry (SGCPR) in West China Hospital of Sichuan University. Finally, 4516 gastric cancer patients were included and were divided into three groups according to time periods (period 1 group: exploration stage of standardized surgical treatment, 2000 to 2006, 967 cases; period 2 group: application stage of standardized surgical treatment, 2007 to 2012, 1962 cases; period 3 group: optimization stage of standardized surgical treatment and application stage of multidisciplinary treatment strategy, 2013 to 2016, 1587 cases). Differences in clinical data, pathologic features, and prognosis were compared among 3 period groups. Follow-up information was updated to January 1, 2020. The overall follow-up rate was 88.9% (4016/4516) and median follow-up duration was 51.58 months. Survival curve was drawn by Kaplan-Meire method and compared with log-rank test. Univariate and multivariate analyses were performed by Cox proportional hazards model. Results: There were significant differences among period 1, period 2 and period 3 groups in the rates of D2/D2+ lymphadenectomy [14.4%(139/967) vs. 47.2%(927/1962) vs. 75.4%(1197/1587), χ(2)=907.210, P<0.001], in the ratio of proximal gastrectomy [19.8%(191/967) vs. 16.6%(325/1962) vs. 8.2%(130/1587), χ(2)=100.020, P<0.001], and in the median intraoperative blood loss (300 ml vs. 100 ml vs. 100 ml, H=1126.500, P<0.001). Besides, the increasing trend and significant difference were also observed in the median number of examined lymph nodes among period 1, period 2 and period 3 groups (14 vs. 26 vs. 30, H=987.100, P<0.001). Survival analysis showed that the 5-year overall survival rate was 55.3% in period 1, 55.2% in period 2 and 62.8% in period 3, and significant difference existed between period 3 and period 1 (P=0.004). The Cox proportional hazards model analysis showed that treatment period (period 3, HR=0.820, 95%CI: 0.708 to 0.950, P=0.008), postoperative chemotherapy (HR=0.696, 95%CI: 0.631 to 0.768, P<0.001) and mid-low gastric cancer (HR=0.884, 95%CI: 0.804 to 0.973, P=0.011) were good prognostic factors. Whereas old age (≥65 years, HR=1.189, 95%CI: 1.084 to 1.303, P<0.001), palliative resection (R1/R2, HR=1.538,95%CI: 1.333 to 1.776, P<0.001), large tumor size (≥5 cm, HR=1.377, 95%CI: 1.239 to 1.529, P<0.001), macroscopic type III to IV (HR=1.165, 95%CI: 1.063 to 1.277, P<0.001) and TNM stage II to IV(II/I:HR=1.801,95%CI:1.500~2.162,P<0.001;III/I:HR=3.588, 95%CI: 3.028~4.251, P<0.001; IV/I: HR=6.114, 95%CI: 4.973~7.516, P<0.001) were independent prognostic risk factors. Conclusion: Through the implementation of standardized surgical treatment technology and multidisciplinary treatment model, the quality of surgery treatment and overall survival increase, and prognosis of gastric cancer patients has been improved.
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Affiliation(s)
- W H Zhang
- Department of Gastrointestinal Surgery, Laboratory of Gastric Cancer, West China Hospital, Chengdu 610041, China
| | - K Yang
- Department of Gastrointestinal Surgery, Laboratory of Gastric Cancer, West China Hospital, Chengdu 610041, China
| | - X Z Chen
- Department of Gastrointestinal Surgery, Laboratory of Gastric Cancer, West China Hospital, Chengdu 610041, China
| | - K Liu
- Department of Gastrointestinal Surgery, Laboratory of Gastric Cancer, West China Hospital, Chengdu 610041, China
| | - X L Chen
- Department of Gastrointestinal Surgery, Laboratory of Gastric Cancer, West China Hospital, Chengdu 610041, China
| | - L Y Zhao
- Department of Gastrointestinal Surgery, Laboratory of Gastric Cancer, West China Hospital, Chengdu 610041, China
| | - B Zhang
- Department of Gastrointestinal Surgery, Laboratory of Gastric Cancer, West China Hospital, Chengdu 610041, China
| | - Z X Chen
- Department of Gastrointestinal Surgery, Laboratory of Gastric Cancer, West China Hospital, Chengdu 610041, China
| | - J P Chen
- Department of Gastrointestinal Surgery, Laboratory of Gastric Cancer, West China Hospital, Chengdu 610041, China
| | - Z G Zhou
- Department of Gastrointestinal Surgery, Laboratory of Digestive Surgery, West China Hospital, Chengdu 610041, China
| | - J K Hu
- Department of Gastrointestinal Surgery, Laboratory of Gastric Cancer, West China Hospital, Chengdu 610041, China
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Yu DD, Hui D, Chen WK, Xiao YB, Wu ZG, Wang QQ, Zhou CF, Chen ZX, Li CD, Cai J. Development and validation of a nomogram to predict survival in patients with metastatic testicular germ cell tumors. Transl Cancer Res 2020; 9:2402-2415. [PMID: 35117600 PMCID: PMC8799105 DOI: 10.21037/tcr.2020.03.59] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2019] [Accepted: 02/28/2020] [Indexed: 11/25/2022]
Abstract
Background To develop a nomogram to predict cancer-specific survival (CSS) in patients with metastatic testicular germ cell tumors (mTGCTs). Methods Data were obtained from the Surveillance, Epidemiology, and End Results database. Univariate and multivariate Cox regression models were used to identify factors associated with CSS. Survival times between different groups were compared using Kaplan-Meier survival curves and the log-rank test. A nomogram visualization model was established using the R language to predict survival rates. Harrell’s concordance index (C-index), the area under the receiver operating characteristic curve (AUC) and calibration plots were used to assess the performance of the model. Results We analyzed the data of 949 patients. The median follow-up time was 32 months (range 0 to 83 months), and 224 (23.60%) patients died before the last follow-up, of whom 193 (20.33%) died of mTGCTs. The site of distant metastases was an independent prognostic factor for CSS. Compared to patients without involvement of the corresponding organ, patients with bone, brain, liver, and lung involvement had worse CSS. We also found that age, histological type, surgery, radiation therapy, chemotherapy, metastatic site and insurance status affected the CSS of patients with mTGCTs. We used these prognostic factors to construct our nomogram. Harrell’s C-index for CSS was 0.739. The AUC and calibration plots indicated good performance of the nomogram. Conclusions A nomogram for predicting CSS in patients with mTGCTs has been developed, which can help patients and clinicians accurately predict mortality risk and recommend personalized treatment modalities.
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Affiliation(s)
- Dong-Dong Yu
- Department of Urology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, China
| | - Dong Hui
- Department of Respiratory Medicine, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, China
| | - Wei-Kang Chen
- Department of Urology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, China
| | - Yun-Bei Xiao
- Department of Urology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, China
| | - Zhi-Gang Wu
- Department of Urology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, China
| | - Qin-Quan Wang
- Department of Urology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, China
| | - Chao-Feng Zhou
- Department of Urology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, China
| | - Zhi-Xia Chen
- Department of Urology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, China
| | - Cheng-Di Li
- Department of Urology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, China
| | - Jian Cai
- Department of Urology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, China
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Chen ZX, Li QC, Liu ZZ, Liang RD, Huang B. [Long non-coding RNA RAB11B-AS1 prevents osteosarcoma proliferation via its sense gene RAB11B]. Zhonghua Yi Xue Za Zhi 2018; 98:2509-2514. [PMID: 30139005 DOI: 10.3760/cma.j.issn.0376-2491.2018.31.012] [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] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To detect the expression of lncRNA RAB11B-AS1 in osteosarcoma and investigate its role in osteosarcoma cells proliferation and the responsible mechanisms. Methods: Osteosarcoma and corresponding adjacent normal tissues were collected from 24 patients subjected to operations from October 2015 to October 2017 in the Third Affiliated Hospital of Southern Medical University.RAB11B-AS1 expression was detected in osteosarcoma specimens by quantitative real-time polymerase chain reaction (qRT-PCR). Lentiviral vectors that stably over-expressing RAB11B-AS1 were constructed and transfected into U2OS osteosarcoma cell line.The effect of RAB11B-AS1 on osteosarcoma cell proliferation and apoptosis was investigated by cell counting kit (CCK-8) assay and flow cytometry.U2OS osteosarcoma xenograft model of nude mice was established to observe the effect of RAB11B-AS1 on xenograft growth in mice, and the role of RAB11B-AS1 in proliferation and apoptosis of osteosarcoma cells was investigated by immunohistochemistry and TUNEL staining of osteosarcoma slices.The relationship between RAB11B-AS1 and RAB11B was explored using luciferase reporter assay.The data were compared with t test between the two groups. Results: Expression of RAB11B-AS1 was significantly down-regulated in osteosarcoma (0.010±0.015) versus their paired non-neoplastic tissues (0.022±0.030) (t=2.117, P=0.045). Up-regulation of RAB11B-AS1 resulted in decreased proliferative rate of U2OS cells (F=15.659, P<0.001). The ratios of cells in G0-G1 phase, S phase, G2-M phase were 62.6%±6.3%, 21.4%±2.2%, 16.3%±1.6% respectively in RAB11B-AS1 up-regulated group versus 59.4%±5.9%, 25.9%±2.6%, 15.5%±1.1% respectively in control group, and cell ratio in G0-G1 and S phase were increased significantly by RAB11B-AS1 up-regulation (t=17.124, 17.321, both P<0.05). Apoptosis rate was significantly elevated in RAB11B-AS1 over-expressed cells (12.7%±1.3%) when compared with that in control (10.3%±1.0%)(t=17.321, P=0.003). Mice transplanted with osteosarcoma cells that overexpressed RAB11B-AS1 exhibited lower growth rate of tumor (F=8.798, P=0.009). Mechanistically, RAB11B-AS1 expression correlated negatively with RAB11B expression (r=-0.356, P=0.044). Conclusions: lncRNA RAB11B-AS1 expression is down-regulated significantly in osteosarcoma tissues.RAB11B-AS1 may suppress the progression of osteosarcoma via down-regulating RAB11B.
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Affiliation(s)
- Z X Chen
- Department of Orthopedics, the Third Affiliated Hospital, Southern Medical University, Guangzhou 510630, China
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Chen ZX, Wang G, Liang L, Lu XR, Guo QH, Zhai YN, Shi XN. [Determination of iodine content in the left ventricular myocardium of healthy subjects using dual-source dual-energy CT myocardial first perfusion imaging: a preliminary study]. Zhonghua Xin Xue Guan Bing Za Zhi 2017; 45:415-418. [PMID: 28511327 DOI: 10.3760/cma.j.issn.0253-3758.2017.05.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Objective: To analyze the normal value of the iodine content in the left ventricular myocardium of healthy subjects and to observe if there is a segmental differences on iodine distribution by using the second generation dual-source dual-energy computed tomography myocardial first perfusion imaging. Methods: In this retrospective study, 42 healthy subjects, who admitted to our department between January to June 2016, with normal second generation dual-source dual-energy computed tomography and coronary CT angioghphy (CTA), electrocardiogram (ECG) results, normal cardiac, hepatic, renal function, normal myocardial enzymes results were enrolled, data from 38 out of 42 subjects with satisfactory image quality were analyzed using Siemens Dual Energy-Heart PBV image processing software.In accordance with the standards of the American Heart Association myocardial 17 fractionation method, content of iodine was measured at different segmental left ventricular myocardium and aorta (left coronary artery from the opening level). The standardized containing iodine value (nIC) was calculated. Results: The iodine content of left ventricular myocardium in normal subjects was 3.1-7.8 mg/ml.The nIC of myocardium from 1st to 17th segments was 0.28±0.06, 0.31±0.07, 0.30±0.07, 0.30±0.04, 0.28±0.04, 0.29±0.05, 0.29±0.01, 0.30±0.07, 0.31±0.07, 0.27±0.06, 0.28±0.08, 0.28±0.07, 0.29±0.08, 0.31±0.07, 0.27±0.06, 0.29±0.06 and 0.21±0.07, respectively.The nIC of the 17th segment was the lowest and was significantly lower than in other segments (all P<0.05), the nIC was similar among the rest 16 segments (all P>0.05). Conclusion: The normal iodine content range in left ventricle myocardium is 3.1-7.8 mg/ml, and the lowest iodine content is detected in the apex and which is significantly lower than the other left ventricular segments.
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Affiliation(s)
- Z X Chen
- Department of Radiology, First Hospital of Lanzhou University, Lanzhou 730000, China
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Zhao M, Yu M, Fang L, Wang H, Wu WX, Huang GH, Duan LL, Chen ZX, Chen PF. [Road-side observational survey on 4 unlawful acts among electric bicycle riders in Zhejiang]. Zhonghua Liu Xing Bing Xue Za Zhi 2017; 37:629-33. [PMID: 27188351 DOI: 10.3760/cma.j.issn.0254-6450.2016.05.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
OBJECTIVE To investigate the prevalence of key unlawful acts among electric bicycle riders and provide evidence for the development of specific interventions. METHODS A 4-day road-side survey was conducted in Jinhua, Zhejiang province, in 2013. The speed of electric bicycle was measured by speed measuring instrument and the unlawful acts of riders, such as reverse riding, running the red-light and carrying passengers, were observed with non-participatory way. RESULTS A total of 3 448 running electric bicycles were observed and the average speed was 26 km/h, the proportion of electric bicycle at the speed of ≥15 km/h was 87.06%. The average speed was highest during 10 am-11 am(30 km/h). the number of observed electric bicycle riders with unlawful acts of ' running the red-light','reverse riding' and ' carrying passengers' were 1 315, 656 and 1 877 respectively, and the estimated rate was 10.01%, 4.99% and 15.22%, respectively. More ' running the red-light','reverse riding' and ' carrying passengers' occurred during 7 am-8 am(14.59%)and 13 pm-14 pm(15.25%), 13 pm-14 pm(7.33%)and 17 pm-18 pm(7.63%), 6 am-7 am(32.44%)and 12 pm-13 pm(27.90%), respectively. CONCLUSION Overspeeding, carrying passengers, running the red-light, reverse riding were the key unlawful acts among electric bicycle riders. Targeted intervention should be carried out to reduce the prevalence of unlawful riding acts and the incidence of electric bicycle related injuries and deaths.
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Affiliation(s)
- M Zhao
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China
| | - M Yu
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China
| | - L Fang
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China
| | - H Wang
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China
| | - W X Wu
- Jinhua Municipal Center for Disease Control and Prevention, Jinhua 321000, China
| | - G H Huang
- Jinhua Municipal Public Security Bureau Traffic Police Detachment, Jinhua 321000, China
| | - L L Duan
- National Center for Chronic and Non-communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 100050, China
| | - Z X Chen
- Jinhua Municipal Center for Disease Control and Prevention, Jinhua 321000, China
| | - P F Chen
- Jinhua Municipal Center for Disease Control and Prevention, Jinhua 321000, China
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Chen ZX, Li B, Liu T, Wang X, Zhu Y, Wang L, Wang XH, Niu X, Xiao Y, Sun Q. Evaluation of paeonol-loaded transethosomes as transdermal delivery carriers. Eur J Pharm Sci 2016; 99:240-245. [PMID: 28039091 DOI: 10.1016/j.ejps.2016.12.026] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2016] [Revised: 12/11/2016] [Accepted: 12/23/2016] [Indexed: 10/20/2022]
Abstract
Paeonol shows effective anti-allergic, anti-inflammatory and analgesic activities. However, because of its poor solubility in water and high volatility at room temperature, the application of this drug is restricted in the clinic. The objective of this research was to develop a biocompatible paeonol formulation with improved stability, skin delivery and pharmacokinetic efficiency. In this paper, paeonol-loaded vesicles were prepared using an ethanol injection method. Nano-vesicles were characterized for their physical properties and encapsulation efficiency (EE). Drug permeation behavior in vitro and deposition quantity in porcine ear skin were measured with a Valia-Chien (V-C) diffusion device. Additionally, a validated and sensitive high performance liquid chromatography (HPLC) method was developed to analyze paeonol concentrations in rat plasma after transdermal administration. The results showed that the particle-size order of the nano-vesicles was the following: transethosomes (122.5±7.5nm)<transfersomes (256.5±8.9nm). Compared to the paeonol transfersomes, the transethosomes had a higher EE (85.5±5.2%), and they showed a spherical morphology with a smooth surface when viewed under a transmission electron microscope (TEM). In an in vitro permeation study, the paeonol transethosomes showed an enhanced transdermal flux of 95.7±8.8μg/cm2/h and a higher deposition quantity in porcine ear skin compared to the transfersomes. A one-compartment first-order absorption model could be used to describe the pharmacokinetics of paeonol in rats after transdermal administration. The AUC of the paeonol transethosomes was approximately 1.57- and 3.52-fold higher than those of the transfersomes and a saturated solution of paeonol in 35% ethanol, respectively. The results demonstrated that the paeonol transethosomes had a narrow size distribution, high encapsulation efficiency, and long residence in the plasma. This formulation remarkably enhanced the bioavailability of paeonol.
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Affiliation(s)
- Z X Chen
- School of Pharmacy, China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning 110122, PR China.
| | - B Li
- School of Pharmacy, China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning 110122, PR China
| | - T Liu
- School of Pharmacy, China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning 110122, PR China
| | - X Wang
- School of Pharmacy, China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning 110122, PR China
| | - Y Zhu
- School of Pharmacy, China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning 110122, PR China
| | - L Wang
- School of Pharmacy, China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning 110122, PR China
| | - X H Wang
- School of Pharmacy, China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning 110122, PR China
| | - X Niu
- School of Pharmacy, China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning 110122, PR China
| | - Y Xiao
- School of Pharmacy, China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning 110122, PR China
| | - Q Sun
- School of Pharmacy, China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning 110122, PR China
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Zhao J, Zhao JY, Chen ZX, Zhong W, Li LY, Liu LC, Hu XX, Chen WJ, Wang MZ. Detection of Echinoderm Microtubule Associated Protein Like 4-Anaplastic Lymphoma Kinase Fusion Genes in Non-small Cell Lung Cancer Clinical Samples by a Real-time Quantitative Reverse Transcription Polymerase Chain Reaction Method. Zhongguo Yi Xue Ke Xue Yuan Xue Bao 2016; 38:643-649. [PMID: 28065229 DOI: 10.3881/j.issn.1000-503x.2016.06.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Objective To establish a real-time quantitative reverse transcription polymerase chain reaction assay (qRT-PCR) for the rapid, sensitive, and specific detection of echinoderm microtubule associated protein like 4-anaplastic lymphoma kinase (EML4-ALK) fusion genes in non-small cell lung cancer. Methods The specific primers for the four variants of EML4-ALK fusion genes (V1, V2, V3a, and V3b) and Taqman fluorescence probes for the detection of the target sequences were carefully designed by the Primer Premier 5.0 software. Then, using pseudovirus containing EML4-ALK fusion genes variants (V1, V2, V3a, and V3b) as the study objects, we further analyzed the lower limit, sensitivity, and specificity of this method. Finally, 50 clinical samples, including 3 ALK-fluorescence in situ hybridization (FISH) positive specimens, were collected and used to detect EML4-ALK fusion genes using this method. Results The lower limit of this method for the detection of EML4-ALK fusion genes was 10 copies/μl if no interference of background RNA existed. Regarding the method's sensitivity, the detection resolution was as high as 1% and 0.5% in the background of 500 and 5000 copies/μl wild-type ALK gene, respectively. Regarding the method's specificity, no non-specific amplification was found when it was used to detect EML4-ALK fusion genes in leukocyte and plasma RNA samples from healthy volunteers. Among the 50 clinical samples, 47 ALK-FISH negative samples were also negative. Among 3 ALK-FISH positive samples, 2 cases were detected positive using this method, but another was not detected because of the failure of RNA extraction. Conclusion The proposed qRT-PCR assay for the detection of EML4-ALK fusion genes is rapid, simple, sensitive, and specific, which is deserved to be validated and widely used in clinical settings.
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Affiliation(s)
- Jing Zhao
- Department of Respiratory Medicine, PUMC Hospital, CAMS and PUMC, Beijing 100730, China
| | - Jin-Yin Zhao
- Key Laboratory of Genome Sciences and Information, Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing 100029, China
| | - Zhi-Xia Chen
- Department of Respiratory Medicine, PUMC Hospital, CAMS and PUMC, Beijing 100730, China
| | - Wei Zhong
- Department of Respiratory Medicine, PUMC Hospital, CAMS and PUMC, Beijing 100730, China2Key Laboratory of Genome Sciences and Information, Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing 100029, China
| | - Long-Yun Li
- Department of Respiratory Medicine, PUMC Hospital, CAMS and PUMC, Beijing 100730, China
| | - Li-Cheng Liu
- Key Laboratory of Genome Sciences and Information, Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing 100029, China
| | - Xiao-Xu Hu
- Key Laboratory of Genome Sciences and Information, Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing 100029, China
| | - Wei-Jun Chen
- Key Laboratory of Genome Sciences and Information, Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing 100029, China
| | - Meng-Zhao Wang
- Department of Respiratory Medicine, PUMC Hospital, CAMS and PUMC, Beijing 100730, China
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Feng SR, Chen ZX, Cen JN, Shen HJ, Wang YY, Yao L. [Critical roles of matrix metalloproteinases secreted by leukemic cells in the pathogenesis of central nervous system leukemia]. Zhonghua Xue Ye Xue Za Zhi 2016; 37:1070-1076. [PMID: 28088972 PMCID: PMC7348488 DOI: 10.3760/cma.j.issn.0253-2727.2016.12.012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
目的 观察白血病细胞分泌的基质金属蛋白酶(MMP)-2和MMP-9对脑微血管内皮细胞(BMVEC)紧密连接蛋白ZO-1、claudin-5、occludin表达及对血脑屏障(BBB)通透性的影响,探讨MMP-2和MMP-9在中枢神经系统白血病(CNSL)发病机制中的作用。 方法 ①实时定量PCR检测SHI-1、HL-60、U937细胞MMP-2、MMP-9基因的转录水平;明胶酶谱法检测细胞培养上清中MMP-2和MMP-9蛋白表达;体外穿膜实验观察各白血病细胞株的侵袭能力。②将原代人BMVEC接种于铺有Matrigel胶和纤维黏连蛋白包被的Transwell小室系统中,建立体外BBB模型。将蛋白酶抑制剂GM6001处理或未处理的SHI-1、HL-60、U937细胞或MMP-2/MMP-9基因沉默的SHI-1细胞接种于BBB模型的Transwell小室上层与BMVEC共培养,倒置相差显微镜观察BMVEC的形态变化,激光共聚焦显微镜观察紧密连接蛋白ZO-1、claudin-5和occludin的表达,计算白血病细胞的穿膜率。 结果 ①SHI-1细胞表达较高转录水平的MMP-2和MMP-9及酶活性,且侵袭能力强于HL-60、U937细胞(P< 0.01)。②与HL-60、SHI-1和U937细胞共培养后,融合致密的BMVEC之间出现间隙、细胞呈单个生长,紧密连接蛋白ZO-1、claudin-5和occludin的表达明显下调,各白血病细胞均不同程度地穿过体外BBB进入Transwell小室下层。其中SHI-1细胞对BMVEC的形态改变及3种紧密连接蛋白的下调最为明显,穿膜率最高。GM6001明显抑制白血病细胞分泌MMP-2和MMP-9,使BMVEC的形态有所恢复,同时上调ZO-1、claudin-5和occludin的表达,降低了BBB的通透性。③用siRNA分别沉默MMP-2和MMP-9基因后,SHI-1细胞分泌MMP-2和MMP-9被抑制,SHI-1细胞穿膜率较沉默前分别下降43.64%和57.30%(P<0.01),ZO-1、claudin-5和occludin表达上调。 结论 白血病细胞株分泌的MMP-2和MMP-9能通过降解BMVEC紧密连接蛋白ZO-1、claudin-5和occludin而破坏BBB。
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Affiliation(s)
| | - Z X Chen
- Jiangsu Institute of Hematology, First Affiliated Hospital of Soochow University, Suzhou 215006, China
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Chen JJ, Wu XJ, Zhang ZY, Chen ZX, Cen Y. [Study of the correlation between the expression of angiotensin Ⅱ and its receptors and collagen deposition in human keloid]. Zhonghua Shao Shang Za Zhi 2016; 32:653-657. [PMID: 27894386 DOI: 10.3760/cma.j.issn.1009-2587.2016.11.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Objective: To study the correlation between the expression of angiotensin Ⅱ, angiotensin Ⅱ type 1 receptor (AT1R), angiotensin Ⅱ type 2 receptor (AT2R) and collagen deposition in human keloid. Methods: The keloid from 19 keloid patients and normal skin from 13 patients performed with free skin transplantation hospitalized in our unit from May 2014 to January 2015 were obtained. The expressions of angiotensin Ⅱ, AT1R, and AT2R were detected by immunohistochemical staining, and the results were semi-quantitatively analyzed by immunohistochemical scoring. The expression of collagen in keloid was detected by picrosirius-red staining, and the percentage of total collagen was calculated. Data were processed with t test. The expressions of angiotensin Ⅱ, AT1R, AT2R and the total content of collagen of 13 keloid patients were analyzed by Pearson correlation analysis. Results: (1) There was negative or probably positive expression of angiotensin Ⅱ in normal skin tissue, mainly distributed in the epidermal basal layer. The expression of angiotensin Ⅱ was strong in keloid, most distributed in spinous layer and basal layer of epidermis and most region of dermis, and was strongly positive in most cells, and most cells were fibroblasts. The expressions of AT1R and AT2R were similar to angiotensin Ⅱ in two types of tissue. The expressions of angiotensin Ⅱ, AT1R, and AT2R in keloid scored (305±34), (281±32), and (285±25) points, respectively, which were significantly higher than those in normal tissue [respectively (54±17), (89±47), and (97±32) points, with t values from 12.03 to 23.21, P values below 0.01]. (2) The total content of collagen in keloid was (88±4)%. There was a lot of thick and dense type Ⅰcollagen in keloid, with massive structure and distributed like bamboo segment and arranged in disorder. The expression of type Ⅲ collagen was increased, which was distributed scatteredly around type Ⅰcollagen. (3) There were positive correlations between the expressions of angiotensin Ⅱ, AT1R, AT2R and the total content of collagen in keloid (with r values from 0.452 to 0.720, P values below 0.05). Conclusions: The expressions of angiotensin Ⅱ, AT1R, and AT2R were abnormally increased in human keloid, which may play an important role in the collagen deposition of keloid.
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Affiliation(s)
- J J Chen
- Department of Burns and Plastic Surgery, West China Hospital, Sichuan University, Chengdu 610041, China
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Xue X, Cao ZX, Zhang XT, Wang Y, Zhang YF, Chen ZX, Pan XB, Zuo SM. Overexpression of OsOSM1 Enhances Resistance to Rice Sheath Blight. Plant Dis 2016; 100:1634-1642. [PMID: 30686242 DOI: 10.1094/pdis-11-15-1372-re] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Sheath blight (SB), caused by Rhizoctonia solani, is one of the most destructive rice diseases worldwide. It has been difficult to generate SB-resistant varieties through conventional breeding because of the quantitative nature of rice resistance to SB. In this study, we found that overexpression of the OsOSM1 gene, encoding an osmotin protein belonging to the pathogenesis-related protein 5 family, is able to improve rice resistance to SB in field tests. Although there are two osmotin genes in rice, OsOSM1 is the one mainly expressed in leaf sheath at the booting stage, coinciding with the critical stage of SB development in the field. In addition, OsOSM1 expression is strongly induced by R. solani in SB-resistant rice variety YSBR1 but not in susceptible varieties, suggesting its involvement in SB resistance. Overexpression of OsOSM1 (OsOSM1ox) in susceptible variety Xudao 3 significantly increases resistance to SB in transgenic rice. The OsOSM1 mRNA levels in different transgenic lines are found to be positively correlated with their SB resistance levels. Intriguingly, although extremely high levels of OsOSM1 were detrimental to rice development, appropriately elevated levels of OsSOM1 were obtained that enhanced rice SB resistance without affecting rice development or grain yield. The OsSOM1 protein is localized on plasma membrane. OsOSM1 is upregulated by jasmonic acid (JA); furthermore, JA-responsive marker genes are induced in OsOSM1ox lines. These results suggest that the activation of JA signaling pathway may account for the increased resistance in transgenic OsOSM1ox lines. Taken together, our results demonstrate that OsOSM1 plays an important role in defense against rice SB disease and provides a new target for engineering resistance to SB.
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Affiliation(s)
- X Xue
- Jiangsu Key Laboratory of Crop Genetics and Physiology/Co-Innovation Center for Modern Production Technology of Grain Crops, Key Laboratory of Plant Functional Genomics of the Ministry of Education, Yangzhou University, Yangzhou 225009, China
| | - Z X Cao
- Jiangsu Key Laboratory of Crop Genetics and Physiology/Co-Innovation Center for Modern Production Technology of Grain Crops, Key Laboratory of Plant Functional Genomics of the Ministry of Education, Yangzhou University, Yangzhou 225009, China
| | - X T Zhang
- Jiangsu Key Laboratory of Crop Genetics and Physiology/Co-Innovation Center for Modern Production Technology of Grain Crops, Key Laboratory of Plant Functional Genomics of the Ministry of Education, Yangzhou University, Yangzhou 225009, China
| | - Y Wang
- Jiangsu Key Laboratory of Crop Genetics and Physiology/Co-Innovation Center for Modern Production Technology of Grain Crops, Key Laboratory of Plant Functional Genomics of the Ministry of Education, Yangzhou University, Yangzhou 225009, China
| | - Y F Zhang
- Jiangsu Key Laboratory of Crop Genetics and Physiology/Co-Innovation Center for Modern Production Technology of Grain Crops, Key Laboratory of Plant Functional Genomics of the Ministry of Education, Yangzhou University, Yangzhou 225009, China
| | - Z X Chen
- Jiangsu Key Laboratory of Crop Genetics and Physiology/Co-Innovation Center for Modern Production Technology of Grain Crops, Key Laboratory of Plant Functional Genomics of the Ministry of Education, Yangzhou University, Yangzhou 225009, China
| | - X B Pan
- Jiangsu Key Laboratory of Crop Genetics and Physiology/Co-Innovation Center for Modern Production Technology of Grain Crops, Key Laboratory of Plant Functional Genomics of the Ministry of Education, Yangzhou University, Yangzhou 225009, China
| | - S M Zuo
- Jiangsu Key Laboratory of Crop Genetics and Physiology/Co-Innovation Center for Modern Production Technology of Grain Crops, Key Laboratory of Plant Functional Genomics of the Ministry of Education, Yangzhou University, Yangzhou 225009, China
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Wang QZ, Huang M, Downie SR, Chen ZX. Development of expressed sequence tag-simple sequence repeat markers for genetic characterization and population structure analysis of Praxelis clematidea (Asteraceae). Genet Mol Res 2016; 15:gmr8038. [PMID: 27323082 DOI: 10.4238/gmr.15028038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Invasive plants tend to spread aggressively in new habitats and an understanding of their genetic diversity and population structure is useful for their management. In this study, expressed sequence tag-simple sequence repeat (EST-SSR) markers were developed for the invasive plant species Praxelis clematidea (Asteraceae) from 5548 Stevia rebaudiana (Asteraceae) expressed sequence tags (ESTs). A total of 133 microsatellite-containing ESTs (2.4%) were identified, of which 56 (42.1%) were hexanucleotide repeat motifs and 50 (37.6%) were trinucleotide repeat motifs. Of the 24 primer pairs designed from these 133 ESTs, 7 (29.2%) resulted in significant polymorphisms. The number of alleles per locus ranged from 5 to 9. The relatively high genetic diversity (H = 0.2667, I = 0.4212, and P = 100%) of P. clematidea was related to high gene flow (Nm = 1.4996) among populations. The coefficient of population differentiation (GST = 0.2500) indicated that most genetic variation occurred within populations. A Mantel test suggested that there was significant correlation between genetic distance and geographical distribution (r = 0.3192, P = 0.012). These results further support the transferability of EST-SSR markers between closely related genera of the same family.
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Affiliation(s)
- Q Z Wang
- College of Chemical and Engineering, Huaqiao University, Xiamen, Fujian, China.,Department of Plant Biology, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - M Huang
- College of Chemical and Engineering, Huaqiao University, Xiamen, Fujian, China
| | - S R Downie
- Department of Plant Biology, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - Z X Chen
- College of Chemical and Engineering, Huaqiao University, Xiamen, Fujian, China
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Chen XJ, Chen Y, Zhang LN, Xu B, Zhang JH, Chen ZX, Tong YH, Zuo SM, Xu JY. Overexpression of OsPGIP1 Enhances Rice Resistance to Sheath Blight. Plant Dis 2016; 100:388-395. [PMID: 30694142 DOI: 10.1094/pdis-03-15-0305-re] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Rice sheath blight (SB), caused by necrotrophic pathogen Rhizoctonia solani, is one of the most destructive rice diseases, and no major resistance genes are available. Polygalacturonase-inhibiting proteins (PGIP) are extracellular leucine-rich repeat proteins and play important roles in plant defense against different pathogenic fungi by counteracting secreted fungal polygalacturonases (PG). However, the role of PGIP in conferring resistance to rice SB remains to be thoroughly investigated. Here, we showed that OsPGIP1 is capable of inhibiting PG derived from R. solani. Our real-time reverse-transcription polymerase chain reaction results indicated that resistant rice 'YSBR1' and 'Jasmine 85' express significantly higher levels of OsPGIP1 than susceptible 'Lemont'. Our results also show that OsPGIP1 is most highly expressed at the late tillering stage in the sheath of YSBR1, coinciding with the critical stage of SB development in field. More importantly, the OsPGIP1 level is highly elevated by inoculation with R. solani in resistant cultivars but not in susceptible Lemont. Overexpression of OsPGIP1 significantly increased rice resistance to SB and inhibited tissue degradation caused by R. solani-secreted PG. Furthermore, OsPGIP1 overexpression did not affect rice agronomic traits or yield components. Together, our results not only demonstrate the important role of OsPGIP1 in combatting the rice SB disease but also provide a new avenue to the improvement of rice SB resistance by manipulating an endogenous gene.
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Affiliation(s)
- X J Chen
- Jiangsu Key Laboratory of Crop Genetics and Physiology/Co-Innovation Center for Modern Production Technology of Grain Crops, Key Laboratory of Plant Functional Genomics of the Ministry of Education, Yangzhou University; and Horticulture and Plant Protection College, Yangzhou University
| | - Y Chen
- Horticulture and Plant Protection College, Yangzhou University
| | - L N Zhang
- Horticulture and Plant Protection College, Yangzhou University
| | - B Xu
- Horticulture and Plant Protection College, Yangzhou University
| | - J H Zhang
- Horticulture and Plant Protection College, Yangzhou University
| | - Z X Chen
- Jiangsu Key Laboratory of Crop Genetics and Physiology/Co-Innovation Center for Modern Production Technology of Grain Crops, Key Laboratory of Plant Functional Genomics of the Ministry of Education, Yangzhou University
| | - Y H Tong
- Horticulture and Plant Protection College, Yangzhou University
| | - S M Zuo
- Jiangsu Key Laboratory of Crop Genetics and Physiology/Co-Innovation Center for Modern Production Technology of Grain Crops, Key Laboratory of Plant Functional Genomics of the Ministry of Education, Yangzhou University
| | - J Y Xu
- Horticulture and Plant Protection College, Yangzhou University, Yangzhou 225009, China
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Liu R, Zhang HH, Chen ZX, Shahid MQ, Fu XL, Liu XD. Drought-tolerant rice germplasm developed from an Oryza officinalis transformation-competent artificial chromosome clone. Genet Mol Res 2015; 14:13667-78. [PMID: 26535682 DOI: 10.4238/2015.october.28.29] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Oryza officinalis has proven to be a natural gene reservoir for the improvement of domesticated rice as it carries many desirable traits; however, the transfer of elite genes to cultivated rice by conventional hybridization has been a challenge for rice breeders. In this study, the conserved sequence of plant stress-related NAC transcription factors was selected as a probe to screen the O. officinalis genomic transformation-competent artificial chromosome library by Southern blot; 11 positive transformation-competent artificial chromosome clones were subsequently detected. By Agrobacterium-mediated transformation, an indica rice variety, Huajingxian 74 (HJX74), was transformed with a TAC clone harboring a NAC gene-positive genomic fragment from O. officinalis. Molecular analysis revealed that the O. officinalis genomic fragment was integrated into the genome of HJX74. The transgenic lines exhibited high tolerance to drought stress. Our results demonstrate that the introduction of stress-related transformation-competent artificial chromosome clones, coupled with a transgenic validation approach, is an effective method of transferring agronomically important genes from O. officinalis to cultivated rice.
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Affiliation(s)
- R Liu
- College of Agriculture, South China Agricultural University, Guangzhou, Guangdong, China
| | - H H Zhang
- College of Agriculture, South China Agricultural University, Guangzhou, Guangdong, China
| | - Z X Chen
- College of Agriculture, South China Agricultural University, Guangzhou, Guangdong, China
| | - M Q Shahid
- College of Agriculture, South China Agricultural University, Guangzhou, Guangdong, China
| | - X L Fu
- College of Agriculture, South China Agricultural University, Guangzhou, Guangdong, China
| | - X D Liu
- College of Agriculture, South China Agricultural University, Guangzhou, Guangdong, China
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Abstract
Patients frequently experience postoperative pain after a total knee arthroplasty; such pain is always challenging to treat and may delay the patient's recovery. It is unclear whether local infiltration or a femoral nerve block offers a better analgesic effect after total knee arthroplasty.We performed a systematic review and meta-analysis of randomized controlled trials to compare local infiltration with a femoral nerve block in patients who underwent a primary unilateral total knee arthroplasty. We searched Pubmed, EMBASE, and the Cochrane Library through December 2014. Two reviewers scanned abstracts and extracted data. The data collected included numeric rating scale values for pain at rest and pain upon movement and opioid consumption in the first 24 hours. Mean differences with 95% confidence intervals were calculated for each end point. A sensitivity analysis was conducted to evaluate potential sources of heterogeneity.While the numeric rating scale values for pain upon movement (MD-0.62; 95%CI: -1.13 to -0.12; p=0.02) in the first 24 hours differed significantly between the patients who received local infiltration and those who received a femoral nerve block, there were no differences in the numeric rating scale results for pain at rest (MD-0.42; 95%CI:-1.32 to 0.47; p=0.35) or opioid consumption (MD 2.92; 95%CI:-1.32 to 7.16; p=0.18) in the first 24 hours.Local infiltration and femoral nerve block showed no significant differences in pain intensity at rest or opioid consumption after total knee arthroplasty, but the femoral nerve block was associated with reduced pain upon movement.
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Affiliation(s)
| | | | | | | | | | - Quan Li
- Corresponding author: E-mail:
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Ren J, Zuo GZ, Hu JS, Sun Z, Yang QX, Li JG, Zakharov LE, Xie H, Chen ZX. A flowing liquid lithium limiter for the Experimental Advanced Superconducting Tokamak. Rev Sci Instrum 2015; 86:023504. [PMID: 25725839 DOI: 10.1063/1.4907622] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A program involving the extensive and systematic use of lithium (Li) as a "first," or plasma-facing, surface in Tokamak fusion research devices located at Institute of Plasma Physics, Chinese Academy of Sciences, was started in 2009. Many remarkable results have been obtained by the application of Li coatings in Experimental Advanced Superconducting Tokamak (EAST) and liquid Li limiters in the HT-7 Tokamak-both located at the institute. In furtherance of the lithium program, a flowing liquid lithium (FLiLi) limiter system has been designed and manufactured for EAST. The design of the FLiLi limiter is based on the concept of a thin flowing film which was previously tested in HT-7. Exploiting the capabilities of the existing material and plasma evaluation system on EAST, the limiter will be pre-wetted with Li and mechanically translated to the edge of EAST during plasma discharges. The limiter will employ a novel electro-magnetic pump which is designed to drive liquid Li flow from a collector at the bottom of limiter into a distributor at its top, and thus supply a continuously flowing liquid Li film to the wetted plasma-facing surface. This paper focuses on the major design elements of the FLiLi limiter. In addition, a simulation of incoming heat flux has shown that the distribution of heat flux on the limiter surface is acceptable for a future test of power extraction on EAST.
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Affiliation(s)
- J Ren
- Institute of Plasma Physics, Chinese Academy of Sciences, 230031 Hefei, China
| | - G Z Zuo
- Institute of Plasma Physics, Chinese Academy of Sciences, 230031 Hefei, China
| | - J S Hu
- Institute of Plasma Physics, Chinese Academy of Sciences, 230031 Hefei, China
| | - Z Sun
- Institute of Plasma Physics, Chinese Academy of Sciences, 230031 Hefei, China
| | - Q X Yang
- Institute of Plasma Physics, Chinese Academy of Sciences, 230031 Hefei, China
| | - J G Li
- Institute of Plasma Physics, Chinese Academy of Sciences, 230031 Hefei, China
| | - L E Zakharov
- USA Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543, USA
| | - H Xie
- Institute of Plasma Physics, Chinese Academy of Sciences, 230031 Hefei, China
| | - Z X Chen
- Institute of Plasma Physics, Chinese Academy of Sciences, 230031 Hefei, China
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Jin SQ, Ding XB, Tong Y, Ren H, Chen ZX, Wang X, Li Q. Effect of saphenous nerve block for postoperative pain on knee surgery: a meta-analysis. Int J Clin Exp Med 2015; 8:368-376. [PMID: 25785007 PMCID: PMC4358462] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2014] [Accepted: 01/07/2015] [Indexed: 06/04/2023]
Abstract
Early post-operative mobilization is important both to reduce immobility-related complications and to get the best functional result following surgery on knee. We hypothesized that saphenous nerve block would reduce pain in this patient category compared with placebo injection. In this study, two reviewers independently searched the databases of PubMed, EMBASE, and Cochrane Library (last performed on 12 October, 2014) to retrieve eligible randomized controlled clinical trials. The primary outcomes were visual analog scale (VAS) pain scores within 24 hours after operation when at rest and at an active flexion of knee. Mean difference (MD) or odds ratio (OR) with 95% confidence intervals (CIs) was calculated for each end point. Subgroup analysis was calculated to evaluate potential sources of heterogeneity. Nine randomized controlled trials were retrieved and analyzed. We found that VAS pain scores at rest within postoperative 24 hours were significantly decreased in saphenous nerve block group than that in placebo group (MD = -0.79; 95% CI -1.35 to -0.22; P = 0.007), as well as VAS pain scores at an active flexion of knee within postoperative 24 hours (MD = -0.92; 95% CI -1.61 to -0.22; P = 0.010). In addition, compared to placebo injection group, saphenous nerve block resulted in significantly less morphine consumption during the first postoperative 24 hours (MD = -6.56; 95% CI -11.26 to -1.86; P = 0.006). To conclude, this meta-analysis suggests that saphenous nerve block has an advantage in pain relief both at an active flexion of knee and at rest after knee surgery. Further studies are still wanted to validate these conclusions.
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Affiliation(s)
- Shu-Qing Jin
- Department of Anesthesiology, Shanghai Tenth People’s Hospital, Tongji University School of Medicine301 Yanchang Road, Zhabei Area, Shanghai, China
- Department of Anesthesiology, East Hospital, Tongji University School of Medicine150 Jimo Road, Pudong New Area, Shanghai, China
| | - Xi-Bing Ding
- Department of Anesthesiology, East Hospital, Tongji University School of Medicine150 Jimo Road, Pudong New Area, Shanghai, China
| | - Yao Tong
- Department of Anesthesiology, Shanghai Tenth People’s Hospital, Tongji University School of Medicine301 Yanchang Road, Zhabei Area, Shanghai, China
| | - Hao Ren
- Department of Anesthesiology, Shanghai Tenth People’s Hospital, Tongji University School of Medicine301 Yanchang Road, Zhabei Area, Shanghai, China
| | - Zhi-Xia Chen
- Department of Anesthesiology, East Hospital, Tongji University School of Medicine150 Jimo Road, Pudong New Area, Shanghai, China
| | - Xin Wang
- Department of Anesthesiology, Shanghai Tenth People’s Hospital, Tongji University School of Medicine301 Yanchang Road, Zhabei Area, Shanghai, China
| | - Quan Li
- Department of Anesthesiology, East Hospital, Tongji University School of Medicine150 Jimo Road, Pudong New Area, Shanghai, China
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Pang YX, Guan LL, Wu LF, Chen ZX, Wang K, Xie XL, Yu FL, Chen XL, Zhang YB, Jiang Q. Cloning and sequence analysis of the Blumea balsamifera DC farnesyl diphosphate synthase gene. Genet Mol Res 2014; 13:9874-82. [PMID: 25501197 DOI: 10.4238/2014.november.27.15] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Blumea balsamifera DC is a member of the Compositae family and is frequently used as traditional Chinese medicine. Blumea balsamifera is rich in monoterpenes, which possess a variety of pharmacological activities, such as antioxidant, anti-bacteria, and anti-viral activities. Farnesyl diphosphate synthase (FPS) is a key enzyme in the biosynthetic pathway of terpenes, playing an important regulatory role in plant growth, such as resistance and secondary metabolism. Based on the conserved oligo amino acid residues of published FPS genes from other higher plant species, a cDNA sequence, designated BbFPS, was isolated from B. balsamifera DC using polymerase chain reaction. The clones were an average of 1.6 kb and contained an open reading frame that predicted a polypeptide of 342 amino acids with 89.07% identity to FPS from other plants. The deduced amino acid sequence was dominated by hydrophobic regions and contained 2 highly conserved DDxxD motifs that are essential for proper functioning of FPS. Phylogenetic analysis indicated that FPS grouped with other composite families. Prediction of secondary structure and subcellular localization suggested that alpha helices made up 70% of the amino acids of the sequence.
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Affiliation(s)
- Y X Pang
- Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou, China
| | - L L Guan
- Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou, China
| | - L F Wu
- Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou, China
| | - Z X Chen
- Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou, China
| | - K Wang
- Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou, China
| | - X L Xie
- Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou, China
| | - F L Yu
- Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou, China
| | - X L Chen
- Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou, China
| | - Y B Zhang
- Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou, China
| | - Q Jiang
- Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou, China
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Tong Y, Ding XB, Wang X, Ren H, Chen ZX, Li Q. Ketamine peritonsillar infiltration during tonsillectomy in pediatric patients: An updated meta-analysis. Int J Pediatr Otorhinolaryngol 2014; 78:1735-41. [PMID: 25139134 DOI: 10.1016/j.ijporl.2014.07.036] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/16/2014] [Revised: 07/20/2014] [Accepted: 07/24/2014] [Indexed: 10/25/2022]
Abstract
OBJECTIVES Peri-operative ketamine peritonsillar infiltration in children can reduce the incidence of postoperative nausea and vomiting (PONV), but its postoperative analgesic time is short. A previous meta-analysis in 2011 was inconclusive due to insufficient data. Consequently, we updated the meta-analysis to verify the role of ketamine peritonsillar infiltration for tonsillectomy in pediatric patients. METHODS Ten randomized controlled trials with a total of 522 cases were included. Pain intensity was measured by standard modified CHEOPS score. RESULTS The pain scores of ketamine group at 30 min and 60 min were significantly lower than placebo group after surgery [weighted mean difference (WMD) -1.20, 95% CI -2.20 to -0.19, P=0.02; WMD -1.71, 95% CI -2.12 to -0.22, P=0.02]. Analgesic requirement in ketamine group were less than placebo group [risk ratio (RR) 0.51, 95% CI 0.26-0.97; P=0.04]. Moreover, the incidence of PONV was lower in ketamine group. (RR 0.73, 95% CI 0.54-0.97; P=0.03). However, there were no differences between these two groups in operation time, anesthesia time, first analgesic time and pain score at 120 min. CONCLUSIONS Compared to placebo, ketamine peritonsillar infiltration can relieve postoperative pain within one hour but not at 120 min and reduces analgesic requirement and incidence of PONV. Moreover, there was no difference in the first analgesic time.
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Affiliation(s)
- Yao Tong
- Department of Anesthesiology, Shanghai East Hospital, Tongji University School of Medicine, 150 Jimo Road, Shanghai 200120, China
| | - Xi-Bing Ding
- Department of Anesthesiology, Shanghai East Hospital, Tongji University School of Medicine, 150 Jimo Road, Shanghai 200120, China
| | - Xin Wang
- Department of First Clinical Medical College, Nanjing Medical University, Nanjing 210000, Jiangsu Province, China
| | - Hao Ren
- Department of Anesthesiology, Shanghai East Hospital, Tongji University School of Medicine, 150 Jimo Road, Shanghai 200120, China
| | - Zhi-Xia Chen
- Department of Anesthesiology, Shanghai East Hospital, Tongji University School of Medicine, 150 Jimo Road, Shanghai 200120, China
| | - Quan Li
- Department of Anesthesiology, Shanghai East Hospital, Tongji University School of Medicine, 150 Jimo Road, Shanghai 200120, China.
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Zuo SM, Zhu YJ, Yin YJ, Wang H, Zhang YF, Chen ZX, Gu SL, Pan XB. Comparison and Confirmation of Quantitative Trait Loci Conferring Partial Resistance to Rice Sheath Blight on Chromosome 9. Plant Dis 2014; 98:957-964. [PMID: 30708839 DOI: 10.1094/pdis-09-13-0940-re] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Sheath blight (SB), caused by Rhizoctonia solani, is one of the worst rice (Orzya sativa) diseases worldwide. Resistance to the SB disease in rice is a complex trait controlled by quantitative trait loci (QTLs). Through map integration, we found several previously identified SB resistance (SBR) QTLs reported in inconsistent regions on the long arm of chromosome 9. Five of them were detected on 'Jasmine 85' (J85), 'Minghui 63' (MH63), and 'Lemont' (LMNT) rice and were designated qSB-9J85-1, qSB-9J85-2, qSB-9MH63-1, qSB-9MH63-2, and qSB-9LMNT, respectively, in the present study. To further verify and physically map the five potential SBR QTLs, we introduced these SBR QTLs into a common susceptible variety (LMNT) and developed a few chromosomal segment substitution lines through marker-assisted selection. After artificial inoculation with the SB fungus, we were able to validate qSB-9J85-2 but not the other four SBR QTLs; whereas, on MH63, an SBR QTL designated qSB-9MH63-3 was confirmed in the region defined by markers Y83 and Y91.8 that included qSB-9J85-2, covering approximately 1,235 kb. Both qSB-9J85-2 and qSB-9MH63-3 appeared to be dominant resistance genes and contributed to similar levels to SB resistance, reducing SB disease severity by approximately 1.0 on a 0-to-9 SB disease rating system. After comparing with another confirmed SBR QTL (qSB-9TQ) from 'Teqing' rice (TQ), we conclude that qSB-9J85-2, qSB-9MH63-3, and qSB-9TQ are probably controlled by the same allelic resistance genes. These results will accelerate the utilization of this major SBR QTL and its map-based cloning.
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Affiliation(s)
- S M Zuo
- Key Lab for Crop Genetics and Physiology of Jiangsu Province and Key Lab of Plant Functional Genomics, Ministry of Education, Yangzhou University, Yangzhou 225009, P.R. China
| | - Y J Zhu
- Key Lab for Crop Genetics and Physiology of Jiangsu Province and Key Lab of Plant Functional Genomics, Ministry of Education, Yangzhou University, Yangzhou 225009, P.R. China
| | - Y J Yin
- Key Lab for Crop Genetics and Physiology of Jiangsu Province and Key Lab of Plant Functional Genomics, Ministry of Education, Yangzhou University, Yangzhou 225009, P.R. China
| | - H Wang
- Key Lab for Crop Genetics and Physiology of Jiangsu Province and Key Lab of Plant Functional Genomics, Ministry of Education, Yangzhou University, Yangzhou 225009, P.R. China
| | - Y F Zhang
- Key Lab for Crop Genetics and Physiology of Jiangsu Province and Key Lab of Plant Functional Genomics, Ministry of Education, Yangzhou University, Yangzhou 225009, P.R. China
| | - Z X Chen
- Key Lab for Crop Genetics and Physiology of Jiangsu Province and Key Lab of Plant Functional Genomics, Ministry of Education, Yangzhou University, Yangzhou 225009, P.R. China
| | - S L Gu
- Key Lab for Crop Genetics and Physiology of Jiangsu Province and Key Lab of Plant Functional Genomics, Ministry of Education, Yangzhou University, Yangzhou 225009, P.R. China
| | - X B Pan
- Key Lab for Crop Genetics and Physiology of Jiangsu Province and Key Lab of Plant Functional Genomics, Ministry of Education, Yangzhou University, Yangzhou 225009, P.R. China
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Chen ZX, Pervaiz S. Erratum: Bcl-2 induces pro-oxidant state by engaging mitochondrial respiration in tumor cells. Cell Death Differ 2012. [DOI: 10.1038/cdd.2011.187] [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: 11/09/2022] Open
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Zhang Y, Hou ZC, Chen ZX, Zheng JX, Chen SR, Qu LJ, Li JY, Xu GY, Yang N. Low-density lipoprotein receptor-related protein 2 gene is associated with egg-quality traits in dwarf layers. Poult Sci 2012; 90:2718-22. [PMID: 22080009 DOI: 10.3382/ps.2011-01751] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Some members of the low-density lipoprotein receptor (LDLR) family play important roles in the regulation of lipoprotein metabolism and egg quality traits. Low-density lipoprotein receptor-related protein 2 (LRP2) gene belongs to the LDLR super family, and widely expresses in many tissues. This work identified and genotyped 1 single-nucleotide polymorphism (SNP), T14347C, at 3'-UTR of the LRP2 using matrix-assisted laser desorption-ionization time-of-flight mass spectrometry (MALDI-TOF MS), and analyzed the effects of the SNP (T14347C) on egg-quality traits in 544 dwarf hens from 44 sire families. Frequencies of this SNP in the studied population did not agree with the Hardy-Weinberg equilibrium (P < 0.0001). Egg weight, albumen weight, albumen height, and albumen ratio of the TT genotype were significantly higher than those of the CC genotype (P < 0.05), whereas eggshell ratio of the TT genotype was significantly lower than that of the CC genotype (P < 0.05). The relative expression level of the LRP2 gene in the magnum was determined by real-time quantitative PCR. The gene expression of genotype CC individuals was significantly higher than that of TT and CT birds (P < 0.05). By combining both genetic effects and expression analyses results, we propose that the LRP2 gene is a good candidate gene, exhibiting a key role in albumen formation processes.
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Affiliation(s)
- Y Zhang
- China Agricultural University, Beijing, China
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Yao JF, Chen ZX, Xu GY, Wang XL, Ning ZH, Zheng JX, Qu LJ, Yang N. Low-density lipoprotein receptor-related protein 8 gene association with egg traits in dwarf chickens. Poult Sci 2010; 89:883-6. [PMID: 20371838 DOI: 10.3382/ps.2009-00613] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Low-density lipoprotein receptor-related protein 8 (LRP8), a member of the low-density lipoprotein receptor gene family with a role in clusterin processing, was investigated as a candidate gene for egg quality-related traits. One SNP from C to T at position 1623 of the open reading frame of LRP8 was identified and genotyped by a high-throughput genotyping method, matrix-assisted laser desorption-ionization time-of-flight mass spectrometry in 747 egg-type dwarf layers from 44 sire families. There were no significant differences among genotypes for any interior egg traits measured, except for yolk color, in which color was deeper for the TT genotype than CC or CT (P < 0.05). For shell traits, strength and thickness were greater for TT than CC (P < 0.05), with CT intermediate and not different from either. Shape index was lower for CT than either TT or CC, which did not differ, whereas for shell color, CT was intermediate to the homozygotes, which differed (CC > TT). The present results indicated that LRP8, as a new member of eggshell matrix protein, may be a candidate gene associated with eggshell traits.
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Affiliation(s)
- J F Yao
- National Engineering Laboratory for Animal Breeding and Department of Animal Genetics and Breeding, China Agricultural University, Beijing 100193, China
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Chen CC, Huang F, Zheng JW, Fu SQ, Kong FZ, Chen ZX, Yang XD, Zang CS. Sectional anatomy of the olfactory pathways. J Neurosurg Sci 2010; 54:39-44. [PMID: 20436397] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
AIM The purpose of this study was to provide practical anatomic data for imaging diagnosis of olfactory pathways and operation of nasal cavity and anterior cranial fossae. METHODS Sectional anatomy of olfactory pathways were investigated specially on 17 sets of Chinese adult cadavers and 9 sets of serial magnetic resonance (MR) imaging of normal adult on serial transverse, sagittal and coronal sections respectively. RESULTS We recognized olfactory bulb, olfactory tract, medial and lateral olfactory striae, olfactory trigone, anterior perforated substance and piriform lobe on transverse, sagittal and coronal sections respectively. On the 5-7 serial coronal sections from crista galli of ethmoid bone to the optic chiasm, the cusp ellipse olfactory bulb and the triangular tract were situated in the shallow part of the olfactory sulcus. CONCLUSION The olfactory bulb and olfactory tract lay tightly on the ethmoidal cribriform plate and jugum sphenoidale, in the olfactory cistern of the shallow part of the olfactory sulcus, the ethmoid sinus and sphenoid sinus inferiorly.
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Affiliation(s)
- C C Chen
- Department of Human Anatomy, Wenzhou Medical College, Wenzhou, China
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Chen ZX, Takao Y, Wang WX, Matsubara T, Ren LM. Surface characteristics and in vitro biocompatibility of titanium anodized in a phosphoric acid solution at different voltages. Biomed Mater 2010; 4:065003. [PMID: 19880985 DOI: 10.1088/1748-6041/4/6/065003] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The surface of commercially pure titanium was modified by anodization treatment in a phosphoric acid solution at different voltages: 100 V, 200 V and 300 V. The surface characteristics of anodic TiO2 layers and their influence on the cell response were investigated. Micrographs by scanning electron microscopy revealed that the dense and uniform oxide layer obtained at 100 V exhibits a nanostructured surface which is similar to the surface of natural tooth cementum. In contrast, porous oxide layers without nanometer features were produced at higher voltages. Thin film x-ray diffraction analysis confirmed the existence of anatase in the oxide layer obtained at 300 V, but not in oxide layers obtained at 100 V and 200 V. The in vitro biocompatibility study of oxide layers demonstrated greater cell adhesion and proliferation of the oxide layer obtained at 100 V compared to the other two kinds of oxide layers.
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Affiliation(s)
- Z X Chen
- Research Institute for Applied Mechanics, Kyushu University, Kasuga-koen 6-1, Kasuga, Fukuoka 816-8580, Japan.
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Chen ZX, Pervaiz S. Involvement of cytochrome c oxidase subunits Va and Vb in the regulation of cancer cell metabolism by Bcl-2. Cell Death Differ 2009; 17:408-20. [PMID: 19834492 DOI: 10.1038/cdd.2009.132] [Citation(s) in RCA: 107] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Bcl-2 has been shown to promote survival of cancer cells by maintaining a slight pro-oxidant state through elevated mitochondrial respiration during basal conditions. On oxidative stress, Bcl-2 moderates mitochondrial respiration through cytochrome c oxidase (COX) activity to prevent an excessive buildup of reactive oxygen species (ROS) by-production from electron transport activities. However, the underlying molecular mechanism(s) of Bcl-2-mediated ROS regulation and its impact on carcinogenesis remain unclear. In this study, we show that Bcl-2 expression positively influences the targeting of nuclear-encoded COX Va and Vb to the mitochondria of cancer cells. In addition, evidence is presented in support of a protein-protein interaction between COX Va and Bcl-2, involving the BH2 domain of Bcl-2. Interestingly, episodes of serum withdrawal, glucose deprivation or hypoxia aimed at inducing early oxidative stress triggered Bcl-2-overexpressing cells to preserve mitochondrial levels of COX Va while depressing COX Vb, whereas the reverse was observed in mock-transfected cells. The unique manner in which Bcl-2 adjusted COX subunits during these physiological stress triggers had a profound impact on the resultant decrease in COX activity and maintenance of mitochondrial ROS levels, thus delineating a novel mechanism for the homeostatic role of Bcl-2 in the redox biology and metabolism of cancer cells.
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Affiliation(s)
- Z X Chen
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
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Abstract
Mitochondrial respiration, the key process behind cellular energy production, is critical for cell proliferation, growth and survival. However, the regulation of mitochondrial respiratory function in tumor cells is not well understood. In this study, we propose a model whereby tumor cells possess the capacity to fine-tune the balance between energy demands and mitochondrial reactive oxygen species (ROS) status, to maintain a milieu optimal for survival. This is achieved through the moderation of mitochondrial respiration, depending on the ROS context within the organelle, with the main players being Bcl-2 and cytochrome c oxidase (COX). We report a higher level of COX activity, oxygen consumption and mitochondrial respiration in tumor cells overexpressing Bcl-2. Transient overexpression, gene silencing and pharmacological inhibition of Bcl-2 corroborate these findings. Interestingly, Bcl-2 is also able to regulate mitochondrial respiration and COX activity in the face of mounting ROS levels, triggered by mitochondrial complex inhibitors. In this respect, it is plausible to suggest that Bcl-2 may be able to create an environment, most suited for survival by adjusting mitochondrial respiration accordingly to meet energy requirements, without incurring an overwhelming, detrimental increase in intracellular ROS.
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Affiliation(s)
- Z X Chen
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
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Abstract
HLA-Cw*1210 and -Cw*080102 were identified in Taiwan populations using reverse-line SSO typing method. Sequencing showed that HLA-Cw*1210 and -Cw*120201/02 were identical at exon 2 but differed at exon 3 with three nucleotide substitutions at codons 99 and 105 and an amino acid change from tyrosine to phenylalanine at codon 99. Also, allele HLA-Cw*080102 differed from HLA-Cw*080101 in exon 3 by a single synonymous nucleotide transition at codon 99. HLA-Cw*080102 was found only in the Puyuma indigenous tribe of Taiwan and had a frequency of 5%. Interestingly, nucleotide substitutions of HLA-Cw*1210 and -Cw*080102 were located in a noticeably heterogeneous region of the 5' end of exon 3, where similar substitution motifs are frequently found in other HLA-C alleles, therefore suggesting preferential gene conversion in this region.
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Affiliation(s)
- C C Chu
- Transfusion Medicine Laboratory, Medical Research Department, Mackay Memorial Hospital, Taipei, Taiwan
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Abstract
Two new HLA-DRB1 alleles have been found by using high-resolution sequence-based typing. The two sequences have been officially named DRB1*1350 (HWS10001327-AY048687) and DRB1*140502 (HWS10001790-AY129430). DRB1*1350 differs from DRB1*110101 by two amino acids at positions 37 (Y-->N) and 58 (A-->E). This allele may arise from gene conversion between DRB1*110101 and DRB1*130201 or DRB1*030101, which are commonly found in Taiwan populations. The other allele, DRB1*140502, obtained from a patient with rheumatoid arthritis, differs from DRB1*140501 at codon 58 (GCC-->GCT). However, it causes no change in amino acid sequence and would therefore not have direct clinical implications.
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Affiliation(s)
- Z X Chen
- Department of Medical Research, Mackay Memorial Hospital, Taipei, Taiwan
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Chen W, Cai WP, Chen ZX, Zhang LD. Structural change of mesoporous silica with sonochemically prepared gold nanoparticles in its pores. Ultrason Sonochem 2001; 8:335-339. [PMID: 11510216 DOI: 10.1016/s1350-4177(00)00077-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Ultrasonic irradiation of mesoporous silica soaked in a mixture of chloroauric acid and isopropanol for 120 min in Ar atmosphere at room temperature yielded Au/SiO2 mesoporous composite, which was characterized by high resolution transmission electron microscopy and optical absorption measurement. The structure of mesoporous silica after sonochemical preparation of gold (Au) nanoparticles within its pores was studied by nitrogen adsorption technique. It has been shown that the structural parameters, such as specific surface area (SSA), porosity (P), the mean pore diameter (lp) were increased significantly after ultrasonic irradiation. It is suggested that the collision of Au nanoparticles with pore walls and localized erosion induced by the asymmetric implosive collapse of cavities on the extensive liquid-solid interface that are responsible for the structural change in the mesoporous solid.
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Affiliation(s)
- W Chen
- Institute of Solid State Physics, Chinese Academia of Sciences, Hefei, Anhui 230031, People's Republic of China.
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Qiang XJ, Xue Y, Chen ZX. [Treatment of the pyogenic infection of the thoracolumbar intervertebral space with vascular pedicled rib grafting]. Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi 2001; 15:219-20. [PMID: 11488029] [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: 02/21/2023]
Abstract
OBJECTIVE To investigate the effect of vascular pedicled rib grafting in treatment of the pyogenic infection of the thoracolumbar intervertebral space. METHODS From November 1993, 7 cases with pyogenic infection of the thoracolumbar intervertebral space were adopted in this study. Among them, there were 5 males and 2 females, aged from 29 to 58 years old. The position of pyogenic infection located at T10 to 11 in 3 cases, at T11 to 12 in 2 cases and at T12 to L1 in 2 cases. During operation, the pyogenic infection was cleared completely and the rib with vascular pedicle was grafted into the intervertebral space. RESULTS Followed up for 10 to 60 months, the bone graft unioned in 3 months for 5 patients and unioned in 4 months for 2 patients. There was no recurrence and raised kyphosis. CONCLUSION The technique of vascular pedicled rib graft is simple, it can shorten the bone union time and reconstruct the stability of spine.
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Affiliation(s)
- X J Qiang
- Department of Orthopedic Surgery, General Hospital of ZPEB, Puyang Henan, P. R. China 457001
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46
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Li X, Gu MH, Liang GH, Xu JF, Chen ZX, Yang HS. [Chromosome location of a semidwarf gene sd-t in indica rice (O. sativa L.)]. Yi Chuan Xue Bao 2001; 28:33-40. [PMID: 11209709] [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: 02/19/2023]
Abstract
For investigating the linkage group to which the semidwarf gene sd-t belongs, the crosses between Aitaiyin 2(ATY2), a variety of sd-t carrier in indica rice, and marker stocks as well as the trisomic lines of IR36 were made. The results indicated that the sd-t gene was linked to the marker genes Prp-b (Purple pericap b), lg(ligueless) and Wh(White hull). The recombination values estimated were 2.85% +/- 0.52% for sd-t to Prp-b, 27.90% +/- 3.81% for sd-t to lg and 38.62% +/- 2.99% for sd-t to Wh, respectively. It was inferred that the sd-t gene was located on chromosome 4 according to the established relationship between chromosomes and linkage groups.
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Affiliation(s)
- X Li
- Department of Agronomy Agric. Coll. Yangzhou University, Yangzhou 225009, China
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47
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Huang KX, An YX, Chen ZX, Xu HB. Isolation and partial characterization of selenium-containing tRNA from germinating barley. Biol Trace Elem Res 2001; 82:247-57. [PMID: 11697773 DOI: 10.1385/bter:82:1-3:247] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/12/2001] [Accepted: 03/01/2001] [Indexed: 11/11/2022]
Abstract
Selenium-containing tRNA was discovered in germinating barley for the first time with the 75Se isotopic tracer technique; therefore, this technique was used to study the effect of different concentrations of selenium and sulfur in the medium on the content of selenium-containing tRNA in germinating barley. Se-containing tRNAs and its hydrolysates were isolated, purified, and characterized by means of column chromatography, ion-exchange chromatography, high-performance liquid chromatography, and the ultraviolet-visible spectrum. The results show that the amount of selenium in tRNA is almost unaffected by the sulfuric content in the medium, and the pathway for selenium and sulfur to enter tRNA might not be exactly the same. Selenium exists within tRNA in the form of 5-methylamine methyl-2-selenouridine, just as it does within a microorganism tRNA.
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Affiliation(s)
- K X Huang
- Department of Chemistry, Huazhong University of Science and Technology, Wuhan, People's Republic of China
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Gu ZP, Mao BY, Wang YX, Zhang RA, Tan YZ, Chen ZX, Cao L, You GD, Segal SJ. Low dose gossypol for male contraception. Asian J Androl 2000; 2:283-7. [PMID: 11202417] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023] Open
Abstract
AIM To ascertain whether the side effects of gossypol, hypokalemia and irreversibility, could be avoided on dose reduction. METHODS Seventy-seven male volunteers were divided into 3 groups: control (22 cases), 10 mg gossypol (29 cases) and 12.5 mg (26 cases). Serum levels of testosterone, FSH and LH were measured by RIA and potassium by flame photometry. Sperm counts and motility were examined before and regularly after treatment for the evaluation of contraceptive efficacy. RESULTS The average sperm density and motility started to decrease significantly by the end of month 2 of medication and gradually reached the infertility levels (< 4 million/mL) in both treated groups. After that the 10 mg group was asked to take the same dose every other day for up to a total observation period of 16-18 months for the maintenance of infertility. Subjects in the 12.5 mg group did not take gossypol any more so as to observe the length of the loading dose required, but in a few, a maintenance dose of 12.5 mg every other day was instituted for a few more months. In both treated groups, none of the spouses was pregnant during the maintenance dose period. Serum levels of potassium, FSH, LH and testosterone were not significantly changed and not a single volunteer complained of myoasthenia. After cessation of drug administration, the semen data returned to pretreatment levels. CONCLUSION A regimen with 10 or 12.5 mg of gossypol as the daily loading dose and 35 or 43.75 mg as the weekly maintenance dose could induce infertility in male volunteers without developing hypokalemia or irreversibility.
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Affiliation(s)
- Z P Gu
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 200031, China.
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Nozawa O, Okazaki T, Morimoto S, Chen ZX, He BM, Mizoue K. Waol B, a new trihydrofuran derivative with cytocidal activity, isolated from Myceliophthora lutea. J Antibiot (Tokyo) 2000; 53:1296-300. [PMID: 11213291 DOI: 10.7164/antibiotics.53.1296] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- O Nozawa
- Research Center of Taisho Pharmaceutical Co Ltd, Saitama, Japan
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50
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Abstract
A virus was isolated from soft-shelled turtle (Trionyx sinensis) with 'red neck disease' on a farm in Shenzhen, China, the virus multiplied and caused a cytopathogenic effect (CPE) at 15-30 degrees C in CO, FHM, CK and BF-2 cells. The optimum conditions for replication was in CO cells at 25-30 degrees C. The virus was sensitive to chloroform treatment, acid (pH 3) or alkaline (pH 10) conditions and heating at 56 degrees C for 30 min. Treatment with 5-iodo-2-deoxyuridine (IUDR) inhibited viral replication, indicating the presence of a DNA genome. Electron microscopy of infected CO culture fluid revealed spherical particles measuring 120-160 nm in diameter. Observation of ultra-thin sections showed numerous hexagonal viral particles in the cytoplasm and nucleus of cells typical of an iridovirus. This virus was moderately virulent for turtles in infection tests. We suggest that this virus is named soft-shelled turtle iridovirus (STIV).
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Affiliation(s)
- Z X Chen
- Shenzhen Animal and Plant Quarantine Bureau, People's Republic of China
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