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Liu J, Wang YL, Chen SP, Cui ZJ. [Dopaminergic drugs for the treatment of unconsciousness caused by artery of Percheron infarction: a case report]. Zhonghua Nei Ke Za Zhi 2022; 61:688-690. [PMID: 35673752 DOI: 10.3760/cma.j.cn112138-20210629-00451] [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)
- J Liu
- Department of Neurology, First Hospital of Qinhuangdao, Qinhuangdao 066000, China
| | - Y L Wang
- Department of Neurology, First Hospital of Qinhuangdao, Qinhuangdao 066000, China
| | - S P Chen
- Department of Neurology, First Hospital of Qinhuangdao, Qinhuangdao 066000, China
| | - Z J Cui
- Department of Neurology, First Hospital of Qinhuangdao, Qinhuangdao 066000, China
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Peng HH, Wang JN, Xiao LF, Yan M, Chen SP, Wang L, Yang K. Elevated Serum FGG Levels Prognosticate and Promote the Disease Progression in Prostate Cancer. Front Genet 2021; 12:651647. [PMID: 33995485 PMCID: PMC8117098 DOI: 10.3389/fgene.2021.651647] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [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] [Received: 01/10/2021] [Accepted: 04/08/2021] [Indexed: 11/23/2022] Open
Abstract
Castration-resistant prostate cancer (CRPC) threatens the health of men in general and no effective therapeutics currently exists for the treatment of CRPC. It is therefore of great importance to find a novel molecule that can be a biomarker and a therapeutic target for CRPC. First, we found that the serum fibrinogen gamma (FGG) levels in patients with CRPC were significantly higher than those with localized prostate cancer (PCa) through iTRAQ proteomics and ELISA experiments. Immunohistochemistry, quantitative real-time polymerase chain reaction and western blot also showed an increase of FGG expression in CRPC tissues and cells. Then we proved the proliferation, invasion and migration ability of CRPC cells were significantly reduced after FGG knockdown. The number of apoptotic cells increased at least sixfold after FGG silencing, and was observed in conjunction with an upregulation of p53, caspase 3, clea-caspase 3, and Bax, and a downregulation of Bcl2 and survivin. FGG knockdown in DU145 cells resulted in smaller xenografts than control cells in a mouse model. and we established that FGG is modulated by IL-6 which was increased in CRPC patients via phosphorylation of STAT3. The data suggests that FGG may be a potential therapeutic target and prognostic marker for CRPC.
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Affiliation(s)
- H H Peng
- Department of Urology, Chengdu Fifth People's Hospital, Chengdu, China
| | - J N Wang
- Department of Urology, Tianjin Institute of Urology, The Second Hospital of Tianjin Medical University, Tianjin, China
| | - L F Xiao
- Department of Reproductive Medicine, Xiangyang No. 1 People's Hospital, Hubei University of Medicine, Xiangyang, China
| | - M Yan
- Department of Urology, Tianjin Institute of Urology, The Second Hospital of Tianjin Medical University, Tianjin, China
| | - S P Chen
- Department of Urology, Tianjin Institute of Urology, The Second Hospital of Tianjin Medical University, Tianjin, China
| | - L Wang
- Department of Urology, Tianjin Institute of Urology, The Second Hospital of Tianjin Medical University, Tianjin, China
| | - K Yang
- Department of Urology, Tianjin Institute of Urology, The Second Hospital of Tianjin Medical University, Tianjin, China
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Hu Z, Yuan X, Chen SP, Song YH, Wang W, Wang SY, Wang LQ, Feng W, Liu S, Sun HS. [Comparison on short-term safety outcomes between off-pump and on-pump coronary artery bypass grafting by experienced surgeons: a single center study with 31 075 cases]. Zhonghua Xin Xue Guan Bing Za Zhi 2021; 49:158-164. [PMID: 33611902 DOI: 10.3760/cma.j.cn112148-20200721-00576] [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 compare the short-term outcomes between off-pump and on-pump coronary artery bypass graft (CABG) by experienced surgeons with similar surgical team in a single large-volume cardiac surgery center. Methods: A total of 31 075 patients with multivessel coronary disease who underwent isolated off-pump or on-pump CABG between January 1, 2009 and December 31, 2019 by experienced surgeons in Fuwai hospital were enrolled in this retrospective study. Patients was divided into on-pump CABG group and on-pump CABG group on an intention-to treat basis. Short term safety endpoints, including 30 days mortality, composite endpoint of major morbidity or mortality, prolonged postoperative length of stay (PLOS), and prolonged ICU length of stay (PICULOS), and distal anastomosis were compared between the two groups. Mortality was evaluated on 30 days post operation, other endpoints were collected before discharge. After 1∶1 propensity-score matching of baseline characteristics for on-pump and off-pump CABG, postoperative endpoints were compared with use of McNemar's test and further adjusted with the use of a logistic regression model. Results: After propensity-score matching, 10 243 matched pairs of patients were included in the final analysis, there were 4 605(22.5%) females and mean age was (60.7±8.6) years. The standardized differences were less than 5% for all baseline variables in matched cohort. Univariate analysis indicated lower risk of 30 days mortality (0.2% vs. 0.7%, P<0.001), major morbidity or mortality (5.7% vs. 8.8%, P<0.001), PLOS (3.2% vs. 4.9%, P<0.001), PICULOS (9.4% vs. 12.2, P<0.001), and lower number of distal anastomosis ((3.3±0.8) vs. (3.6±0.8), P<0.001) in off-pump CABG group than in on-pump CABG group. After adjustment of cofounders, multivariate analysis showed that off-pump CABG was still associated with a lower risk of 30 days mortality (OR=0.29, 95%CI: 0.09-0.87, P=0.027), composite endpoint of major morbidity or mortality (OR=0.60, 95%CI: 0.53-0.68, P<0.001), PLOS (OR=0.64, 95%CI 0.54-0.75, P<0.001), PICULOS (OR=0.76, 95%CI: 0.69-0.84, P<0.001). Conclusions: Off-pump CABG is related with superior short-term safety outcomes than on-pump CABG by experienced surgeons in our center.
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Affiliation(s)
- Z Hu
- Department of Cardiovascular Surgery, National Clinical Research Center of Cardiovascular Diseases, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, China
| | - X Yuan
- Department of Cardiovascular Surgery, National Clinical Research Center of Cardiovascular Diseases, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, China
| | - S P Chen
- Information Center, National Clinical Research Center of Cardiovascular Diseases, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, China
| | - Y H Song
- Department of Cardiovascular Surgery, National Clinical Research Center of Cardiovascular Diseases, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, China
| | | | - S Y Wang
- Department of Cardiovascular Surgery, National Clinical Research Center of Cardiovascular Diseases, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, China
| | - L Q Wang
- Department of Cardiovascular Surgery, National Clinical Research Center of Cardiovascular Diseases, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, China
| | - W Feng
- Department of Cardiovascular Surgery, National Clinical Research Center of Cardiovascular Diseases, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, China
| | - S Liu
- Department of Cardiovascular Surgery, National Clinical Research Center of Cardiovascular Diseases, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, China
| | - H S Sun
- Department of Cardiovascular Surgery, National Clinical Research Center of Cardiovascular Diseases, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, China
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Huang M, Chen SP, Dai YY, Yang Y, Jiang W, Wang F, Zhang JX, Zhu QX. [Cathepsin L mediates glomerular endothelial cell injury by cleavaging complement C3 in trichloroethylene-sensitized mice]. Zhonghua Lao Dong Wei Sheng Zhi Ye Bing Za Zhi 2021; 39:5-11. [PMID: 33535331 DOI: 10.3760/cma.j.cn121094-20200701-00380] [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 observe the expressions of complement 3 (C3) and endothelial cell injury-associated proteins before and after cathepsin L (CTSL) blockade in renal injury of trichloroethylene (TCE) -sensitized mice. Methods: In June 2018, 41 SPF female BALB/c mice were divided respectively into blank control group (n=5) , vehicle control group (n=5) , TCE group (n=15) and TCE+CTSLi group (n=16) to establish trichloroethylene-sensitized mice model by pretreating the mice with intraperitoneal injection of CTSL inhibitor (CTSLi) and using TCE for the first and last challenge. According to the skin sensitization score, the mice were divided into positive group and negative group. 72 hours after the last challenge, the renal function indexes of the mice were detected, the pathological changes of mice kidneys were observed, and the glomerular C3 and endothelial cell damage-related proteins [vascular cell adhesion molecule 1 (VCAM-1) , tight junction protein 5 (Claudin-5) and Syndecan-1] expression levels were detected. Results: The sensitization rates of mice in TCE group and TCE+CTSLi group were 53.3% (8/15) and 50.0% (8/16) , respectively, and there was no significant difference between the two groups (P>0.05) . Compared with vehicle control group and the corresponding TCE negative group, the serum creatinine (CRE) and blood urea nitrogen (BUN) levels of mice in the TCE positive group was increased, while the TCE positive group were higher than the TCE+CTSLi positive group (P<0.05) . Pathological examination showed obvious vacuolar degeneration and cellular edema in the mice kidney of the TCE positive group. In the TCE+CTSLi positive group, the above pathological damage was significantly improved. Immunohistochemical results showed that the expression of glomerular C3 fragment and VCAM-1 in TCE positive group were significantly higher than that of the vehicle control and TCE negative group (P<0.05) , while TCE+CTSLi positive group was significantly lower than that of TCE positive group (P<0.05) . Western blot test results showed that the relative expression levels of Claudin-5 and Syndecan-1 protein in the mice glomeruli of TCE positive group were significantly lower than those in the vehicle control group and TCE negative group (P<0.05) . Compared with the TCE positive group, the Claudin-5 protein was increased in the kidney of the TCE+CTSLi positive group, but the difference was not statistically significant (P>0.05) , while the Syndecan-1 protein was significantly increased in the TCE+CTSLi positive group (P<0.05) . Conclusion: CTSL may mediate the glomerular structural damage by cutting complement C3, activating the complement system, damaging endothelial cell structural protein Syndecan-1 and overexpressing adhesion molecule VCAM-1 in TCE-sensitized mice. Inhibiting the expression of CTSL may be an effective way to protect the glomerular integrity of structure and function in pharmacology.
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Affiliation(s)
- M Huang
- Department of Occupational and Environmental Health, School of Public Health, Anhui Medical University, Hefei 230032, China
| | - S P Chen
- Department of Occupational and Environmental Health, School of Public Health, Anhui Medical University, Hefei 230032, China
| | - Y Y Dai
- Department of Occupational and Environmental Health, School of Public Health, Anhui Medical University, Hefei 230032, China
| | - Y Yang
- Department of Occupational and Environmental Health, School of Public Health, Anhui Medical University, Hefei 230032, China
| | - W Jiang
- Department of Occupational and Environmental Health, School of Public Health, Anhui Medical University, Hefei 230032, China
| | - F Wang
- Department of Dermatology, the Second Affiliated Hospital of Anhui Medical University, Hefei 230601, China
| | - J X Zhang
- Department of Occupational and Environmental Health, School of Public Health, Anhui Medical University, Hefei 230032, China
| | - Q X Zhu
- Department of Occupational and Environmental Health, School of Public Health, Anhui Medical University, Hefei 230032, China; Institute of Dermatology, the First Affiliated Hospital of Anhui Medical University, Hefei 230032, China
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Hsiao YH, Hsieh MJ, Yang SF, Chen SP, Tsai WC, Chen PN. Phloretin suppresses metastasis by targeting protease and inhibits cancer stemness and angiogenesis in human cervical cancer cells. Phytomedicine 2019; 62:152964. [PMID: 31153059 DOI: 10.1016/j.phymed.2019.152964] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Revised: 05/13/2019] [Accepted: 05/16/2019] [Indexed: 06/09/2023]
Abstract
BACKGROUND Phloretin, a dihydrochalcone flavonoid, possesses anti-inflammatory activity and inhibits the growth of various cancers. However, the flavonoid's effect on cervical cancer metastasis and angiogenesis remains unknown. PURPOSE In this study, we provide molecular evidence associated with the antimetastatic and antiangiogenic effects of phloretin. METHODS In this study, the anti-invasive effect of phloretin (0-60 μM) in cervical cancer cells was evaluated using the Matrigel invasion assay, gelatin zymography, cell-matrix adhesion assay, wound healing assay, and Western blotting. Antiangiogenic potential of phloretin (0-100 μM) was assessed by the Matrigel tube formation assay. The in vivo antitumor effect of phloretin (10 or 20 mg/kg) was fed by oral gavage and determined using subcutaneous inoculation and tail vein injection in immunodeficient nude mice. RESULTS Phloretin (60 μM) showed marked suppression of invasion and migration through downregulation of matrix metalloproteinase (MMP)-2, MMP-3, and cathepsin S in human SiHa cervical cancer cells. Phloretin (60 μM) reversed the epithelial-mesenchymal transition induced by transforming growth factor-β1 and downregulated mesenchymal markers, such as fibronectin, vimentin, and RhoA. Phloretin (100 μM) treatment significantly inhibited the aldehyde dehydrogenase 1 activity of SiHa cells, reduced the self-renewal properties and stemness signatures of CD44 and Sox-2 in sphere-forming cervical cancer-derived tumor-initiating cells, and inhibited the invasion, MMP-2 activity, and tube formation capacity of human umbilical vein endothelial cells. The ability of phloretin (20 mg/kg) to suppress lung metastasis and tumor growth in SiHa cells was evidenced by tail vein injection and subcutaneous inoculation in a tumor xenograft model. CONCLUSION In summary, the findings indicate that phloretin inhibits the metastatic and angiogenic abilities and cancer stemness of SiHa cells, thereby suggesting that this flavonoid is a promising therapeutic agent for the treatment of human cervical cancer cells.
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Affiliation(s)
- Yi-Hsuan Hsiao
- School of Medicine, Chung Shan Medical University, Taichung, Taiwan; Department of Obstetrics and Gynecology, Changhua Christian Hospital, Changhua, Taiwan; Women's Health Research Laboratory, Changhua Christian Hospital, Changhua, Taiwan
| | - Ming-Ju Hsieh
- Cancer Research Center, Changhua Christian Hospital, Changhua, Taiwan; Institute of Medicine, Chung Shan Medical University, Taichung, Taiwan; Graduate Institute of Biomedical Sciences, China Medical University, Taichung, Taiwan
| | - Shun-Fa Yang
- Institute of Medicine, Chung Shan Medical University, Taichung, Taiwan; Department of Medical Research, Chung Shan Medical University Hospital, Taichung, Taiwan
| | - Shao-Pin Chen
- Institute of Biochemistry, Microbiology and Immunology, Chung Shang Medical University, Taichung, Taiwan
| | - Wen-Chi Tsai
- Institute of Biochemistry, Microbiology and Immunology, Chung Shang Medical University, Taichung, Taiwan
| | - Pei-Ni Chen
- Institute of Biochemistry, Microbiology and Immunology, Chung Shang Medical University, Taichung, Taiwan; Clinical Laboratory, Chung Shan Medical University Hospital, Taichung, Taiwan.
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Li CJ, Wang TY, Cao JY, Huang AL, Wang JF, Ren CG, Chen SP, Wu LJ. [Mode of median nerve irritation under different wrist forcing postures observed by ultrasonography and foot pressure measurement system]. Zhonghua Yi Xue Za Zhi 2018; 98:3490-3495. [PMID: 30481897 DOI: 10.3760/cma.j.issn.0376-2491.2018.43.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Objective: To analyze the influence of simulation mouse use motion under different wrist forcing postures on median nerve, tendons and ligaments in the carpal tunnel. Methods: From June to November in 2017, a total of 49 healthy volunteers [aged from 18 to 27 years, 24 males (48 cases of hands) and 25 females (50 cases of hands)] were selected in the Institute of Digitized Medicine and First Affiliated Hospital of Wenzhou Medical University.Three hand postures of the volunteers were simultaneously and continuously measured by using LOGIQ E9 ultrasonic diagnostic apparatus and Zebris foot pressure distribution measurement system.Seventeen parameters of nerves, tendons and ligaments in carpal tunnel were observed under natural (0 N), and two forced (25 and 50 N) states.Double factor variance analysis was performed with generalized estimating equation (GEE). Results: With increasing pressure (0, 25 and 50 N) of hand postures, the distance between median nerve and transverse carpal ligament were all less than 0.2 cm.The differences in both the distance between median nerve and flexor pollicis longus under the hand pressure changes or under the hand posture changes and the top angle of a triangle composed of median nerve, flexor pollicis longus and flexor digitorum superficialis group under the hand pressure changes or under the hand posture changes were all significant under the GEE analysis (all P<0.01). There were no significant changes in all other structural parameters in the carpal tunnel with the increasing of hand pressure (all P>0.05). Conclusions: The influence of the transverse carpal ligament to the median nerve belongs to the mechanism of pressure-induced irritation damage.The influence of flexor pollicis longus to median nerve belongs to the mechanism of tension-induced irritation damage.The influence of flexor digitorum superficialis to median nerve belongs to the mechanism of mixed shear irritation damage.
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Affiliation(s)
- C J Li
- Institute of Digitized Medicine, Wenzhou Medical University, Zhejiang 325035, China
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Yang KL, Marsh SGE, Soormally AR, Chen SP, Lin PY. Identification of a novel HLA-A*02:01:01 variant, HLA-A*02:01:01:09, in a Taiwanese bone marrow donor. HLA 2017; 89:301-302. [PMID: 28266185 DOI: 10.1111/tan.13003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [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: 12/08/2016] [Revised: 02/13/2017] [Accepted: 02/15/2017] [Indexed: 11/26/2022]
Abstract
An intronic mutation in intron 3 of A*02:01:01:01 leads to the formation of A*02:01:01:09.
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Affiliation(s)
- K L Yang
- Laboratory of Immunogenetics, Tzu Chi Cord Blood Bank, and Buddhist Tzu Chi Marrow Donor Registry, Buddhist Tzu Chi Stem Cells Centre, Hualien Tzu Chi Hospital, Hualien, Taiwan, Republic of China.,Department of Medical Research, Buddhist Tzu Chi University, Hualien, Taiwan, Republic of China
| | - S G E Marsh
- Anthony Nolan Research Institute and UCL Cancer Institute, The Royal Free Campus, London, UK
| | - A R Soormally
- Anthony Nolan Research Institute and UCL Cancer Institute, The Royal Free Campus, London, UK
| | - S P Chen
- Laboratory of Immunogenetics, Tzu Chi Cord Blood Bank, and Buddhist Tzu Chi Marrow Donor Registry, Buddhist Tzu Chi Stem Cells Centre, Hualien Tzu Chi Hospital, Hualien, Taiwan, Republic of China
| | - P Y Lin
- Laboratory of Immunogenetics, Tzu Chi Cord Blood Bank, and Buddhist Tzu Chi Marrow Donor Registry, Buddhist Tzu Chi Stem Cells Centre, Hualien Tzu Chi Hospital, Hualien, Taiwan, Republic of China
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Abstract
OBJECTIVE To explore the expression of Ubiquitin-specific processing enzyme 37(USP 37)in breast cancer and its association with the prognosis of breast cancer. METHODS In this study, the method of Western blot was utilized to examine the expression of USP37 protein in breast cancer fresh tissue. Immunohistochemistry (IHC) was used to determine the expression of USP37 in 533 cases of breast cancer. Receive operating characteristic (ROC) curve analysis was employed to determine a cut-off score for USP37 expression. For validation, the ROC-derived cut-off score was subjected to analysis the association of USP37 expression with cancer patient outcome and clinical characteristics. RESULTS USP37 protein was mainly located in cytoplasm of the cell, occasionally in nucleus by immunohistochemistry. In the normal breast tissue, USP37 was not expressed or with low expression level, while in the 533 cases of breast cancer, the high USP37 expression was detected in 50.7% samples (270/533) with corresponding low or negative expression rate 49.3% (263/533). We found that USP37 was highly expressed in primary breast cancer tissues compared to paired adjacent non-cancerous tissues. High expression of USP37 was associated with breast cancer node classification, molecular classification and proliferation biomarker Ki67. Both univariate and multivariate analyses further revealed that USP37 expression was an independent poor prognostic parameter for overall survival (OS), recurrence-free survival (RFS) and metastasis-free survival (MFS) in breast cancer. Furthermore, USP37 expressions divided the luminal and triple negative breast cancer into different prognosis subgroups. CONCLUSION Our findings first provide evidences that high expression of USP37 served as an independent molecular biomarker for poor prognosis in breast cancer.
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Affiliation(s)
- Q X Zhang
- Department of Oncology, the First Affiliated Hospital of Guangdong Pharmaceutical University, Guangzhou 510080, China
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Chiu SC, Huang SY, Chen SP, Su CC, Chiu TL, Pang CY. Tanshinone IIA inhibits human prostate cancer cells growth by induction of endoplasmic reticulum stress in vitro and in vivo. Prostate Cancer Prostatic Dis 2013; 16:315-22. [PMID: 24042854 DOI: 10.1038/pcan.2013.38] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2013] [Revised: 08/08/2013] [Accepted: 08/12/2013] [Indexed: 11/09/2022]
Abstract
BACKGROUND Tanshinone IIA (Tan-IIA) is one of the major lipophilic components isolated from the root of Salviae Miltiorrhizae Radix. We explored the mechanisms of cell death induced by Tan-IIA treatment in prostate cancer cells in vitro and in vivo. METHODS Cells were treated with Tan-IIA and growth inhibition was assessed. Cell cycle profiles after Tan-IIA treatment were determined by flow cytometry. Expression levels of cell cycle regulatory proteins and apoptosis-related proteins were determined after Tan-IIA treatment. Expression levels of endoplasmic reticulum (ER) stress-regulated genes were determined to investigate their role in Tan-IIA-induced cell death. GADD153 expression was knocked down by small interfering RNA (siRNA) transfection. Rate of cell death and proliferation was obtained by 3-(4,5-dimethyl thizol-2-yl)-2,5-diphenyl tetrazolium bromide assay. Antitumor activity of Tan-IIA was performed in LNCaP xenograft model. RESULTS Our results showed that Tan-IIA caused prostate cancer cell death in a dose-dependent manner, and cell cycle arrest at G0/G1 phase was noted, in LNCaP cells. The G0/G1 phase arrest correlated with increase levels of CDK inhibitors (p16, p21 and p27) and decrease of the checkpoint proteins. Tan-IIA also induced ER stress in prostate cancer cells: activation and nuclear translocation of GADD153/CCAAT/enhancer-binding protein-homologous protein (CHOP) were identified, and increased expression of the downstream molecules GRP78/BiP, inositol-requiring protein-1α and GADD153/CHOP were evidenced. Blockage of GADD153/CHOP expression by siRNA reduced Tan-IIA-induced cell death in LNCaP cells. Tan-IIA also suppressed LNCaP xenograft tumor growth, causing 86.4% reduction in tumor volume after 13 days of treatment. CONCLUSIONS Our findings suggest that Tan-IIA causes G0/G1 cell cycle arrest in LNCaP cells and its cytotoxicity is mediated at least partly by ER stress induction. These data provide evidence supporting Tan-IIA as a potential anticancer agent by inducing ER stress in prostate cancer.
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Affiliation(s)
- S C Chiu
- Department of Research, Taichung Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Taichung, Taiwan
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Yang KL, Lee SK, Lin CC, Jiang S, Chiu HM, Lin S, Chen YC, Chen SP, Yang SY, Jian YF, Shyr MH, Lin CL, Lin PY. Detection of two HLA-A alleles, A*31:30 and A*26:20, in two Taiwanese volunteer bone marrow donors by sequence-based typing. Int J Immunogenet 2011; 38:437-40. [PMID: 21692992 DOI: 10.1111/j.1744-313x.2011.01023.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We here report detection of a novel sequence of HLA-A*31:30 and a confirmatory sequence of HLA*26:20 from two Taiwanese individuals. The sequence of A*31:30 is identical to that of A*31:01:02 in exons 2 and 3, except one nucleotide (n.t.) substitution c.539T > G resulting in p.Leu180Trp. The sequence of A*26:20 is identical to A*26:01:01 in exons 2 and 3, except a segment of the sequence from n.t. 78 to n.t.102. The mismatched sequence segment is identical to a sequence segment of A*02:03:01, suggesting that the formation of A*26:20 was resulted from a DNA recombination event between A*26:01:01 and A*02:03:01 sequences. A*26:20 differs from A*26:01:01 with c.98A > T resulting in p.Tyr33Phe.
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Affiliation(s)
- K L Yang
- Laboratory of Immunogenetics, Tzu Chi Cord Blood Bank and Buddhist Tzu Chi Marrow Donor Registry, Buddhist Tzu Chi Stem Cells Centre, Buddhist Tzu Chi General Hospital, Buddhist Compassion Relief Tzu Chi Foundation, Hualien, Taiwan.
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Burakovsky L, Chen SP, Preston DL, Belonoshko AB, Rosengren A, Mikhaylushkin AS, Simak SI, Moriarty JA. High-pressure--high-temperature polymorphism in ta: resolving an ongoing experimental controversy. Phys Rev Lett 2010; 104:255702. [PMID: 20867396 DOI: 10.1103/physrevlett.104.255702] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2010] [Indexed: 05/29/2023]
Abstract
Phase diagrams of refractory metals remain essentially unknown. Moreover, there is an ongoing controversy over the high-pressure melting temperatures of these metals: results of diamond anvil cell (DAC) and shock wave experiments differ by at least a factor of 2. From an extensive ab initio study on tantalum we discovered that the body-centered cubic phase, its physical phase at ambient conditions, transforms to another solid phase, possibly hexagonal omega phase, at high temperature. Hence the sample motion observed in DAC experiments is very likely not due to melting but internal stresses accompanying a solid-solid transformation, and thermal stresses associated with laser heating.
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Affiliation(s)
- L Burakovsky
- Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
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Mak CM, Lam CW, Siu TS, Chan KY, Siu WK, Yeung WL, Hui J, Wong VCN, Low LCK, Ko CH, Fung CW, Chen SP, Yuen YP, Lee HC, Yau E, Chan B, Tong SF, Tam S, Chan YW. Biochemical and molecular characterization of tyrosine hydroxylase deficiency in Hong Kong Chinese. Mol Genet Metab 2010; 99:431-3. [PMID: 20056467 DOI: 10.1016/j.ymgme.2009.12.011] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [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: 11/11/2009] [Revised: 12/15/2009] [Accepted: 12/15/2009] [Indexed: 11/15/2022]
Abstract
Tyrosine hydroxylase deficiency is a rare neurotransmitter disorder affecting the rate-limiting step in catecholamine biosynthesis. There are about 40 cases reported worldwide. Here, we report the biochemical and molecular findings of eight unrelated Chinese patients with tyrosine hydroxylase deficiency. We have identified eight novel mutations with 5 missense, 2 nonsense and 1 splicing mutations in the TH gene, namely p.R153X, p.R169X, p.G294R, p.G315S, p.A385V, p.I394T, p.G408R, and c.1163+5G>C. The mutations of the TH gene in Chinese are heterogeneous.
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Affiliation(s)
- C M Mak
- Department of Pathology, Princess Margaret Hospital, Hong Kong SAR, China
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14
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Luo CW, Lee CC, Li CH, Shih HC, Chen YJ, Hsieh CC, Su CH, Tzeng WY, Wu KH, Juang JY, Uen TM, Chen SP, Lin JY, Kobayashi T. Ordered YBCO sub-micron array structures induced by pulsed femtosecond laser irradiation. Opt Express 2008; 16:20610-20616. [PMID: 19065200 DOI: 10.1364/oe.16.020610] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
We report on the formation of organized sub-micron YBa(2)Cu(3)O(7) (YBCO) dots induced by irradiating femtosecond laser pulses on YBCO films prepared by pulse laser deposition with fluence in the range of 0.21 approximately 0.53 J/cm(2). The morphology of the YBCO film surface depends strongly on the laser fluences irradiated. At lower laser fluence (approximately 0.21 J/cm(2)) the morphology was pattern of periodic ripples with sub-micrometer spacing. Slightly increasing the laser fluence to 0.26 J/cm(2) changes the pattern into organized sub-micron dots with diameters ranging from 100 nm to 800 nm and height of 150 nm. Further increase of the laser fluence to over 0.32 J/cm(2), however, appeared to result in massive melting and led to irregular morphology. The mechanism and the implications of the current findings will be discussed. Arrays of YBCO sub-micron dots with T(c) = 89.7 K were obtained.
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Affiliation(s)
- C W Luo
- Department of Electrophysics, National Chiao-Tung University, Hsinchu, Taiwan, ROC.
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15
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Belonoshko AB, Burakovsky L, Chen SP, Johansson B, Mikhaylushkin AS, Preston DL, Simak SI, Swift DC. Molybdenum at high pressure and temperature: melting from another solid phase. Phys Rev Lett 2008; 100:135701. [PMID: 18517968 DOI: 10.1103/physrevlett.100.135701] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2007] [Indexed: 05/26/2023]
Abstract
The Gibbs free energies of bcc and fcc Mo are calculated from first principles in the quasiharmonic approximation in the pressure range from 350 to 850 GPa at room temperatures up to 7500 K. It is found that Mo, stable in the bcc phase at low temperatures, has lower free energy in the fcc structure than in the bcc phase at elevated temperatures. Our density-functional-theory-based molecular dynamics simulations demonstrate that fcc melts at higher than bcc temperatures above 1.5 Mbar. Our calculated melting temperatures and bcc-fcc boundary are consistent with the Mo Hugoniot sound speed measurements. We find that melting occurs at temperatures significantly above the bcc-fcc boundary. This suggests an explanation of the recent diamond anvil cell experiments, which find a phase boundary in the vicinity of our extrapolated bcc-fcc boundary.
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Affiliation(s)
- A B Belonoshko
- Applied Materials Physics, Department of Material Science and Engineering, The Royal Institute of Technology, 10044 Stockholm, Sweden
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16
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Pei DS, Sun YH, Chen SP, Wang YP, Hu W, Zhu ZY. Identification of differentially expressed genes from the cross-subfamily cloned embryos derived from zebrafish nuclei and rare minnow enucleated eggs. Theriogenology 2007; 68:1282-91. [PMID: 17919716 DOI: 10.1016/j.theriogenology.2007.08.027] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2007] [Revised: 08/26/2007] [Accepted: 08/01/2007] [Indexed: 11/19/2022]
Abstract
Cross-species nuclear transfer (NT) has been used to retain the genetic viability of a species near extinction. However, unlike intra-species NT, most embryos produced by cross-species NT were unable to develop to later stages due to incompatible nucleo-cytoplasmic interactions between the donor nuclei and the recipient cytoplasm from different species. To study the early nucleo-cytoplasmic interaction in cross-species NT, two laboratory fish species (zebrafish and rare minnow) from different subfamilies were used to generate cross-subfamily NT embryos in the present study. Suppression subtractive hybridization (SSH) was performed to screen out differentially expressed genes from the forward and reverse subtractive cDNA libraries. After dot blot and real-time PCR analysis, 80 of 500 randomly selective sequences were proven to be differentially expressed in the cloned embryos. Among them, 45 sequences shared high homology with 28 zebrafish known genes, and 35 sequences were corresponding to 22 novel expressed sequence tags (ESTs). Based on functional clustering and literature mining analysis, up- and down-regulated genes in the cross-subfamily cloned embryos were mostly relevant to transcription and translation initiation, cell cycle regulation, protein binding, etc. To our knowledge, this is the first report on the determination of genes involved in the early development of cross-species NT embryos of fish.
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Affiliation(s)
- D S Pei
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
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17
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Chen SP, Sun YF, Lee MC, Cheng IC, Yang PC, Huang TS, Jong MH, Robertson ID, Edwards JR, Ellis TM. Immune responses to foot-and-mouth disease virus in pig farms after the 1997 outbreak in Taiwan. Vet Microbiol 2007; 126:82-90. [PMID: 17716836 DOI: 10.1016/j.vetmic.2007.07.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2007] [Revised: 07/04/2007] [Accepted: 07/05/2007] [Indexed: 11/28/2022]
Abstract
This paper reports on a retrospective study of the antibody responses to structural and non-structural proteins of FMD virus O Taiwan 97 in six pig herds in Taiwan in the year after the 1997 Taiwanese FMD outbreak. All herds were vaccinated against FMD after the outbreak as part of the countrywide control program. Three of the herds had confirmed FMD infections (herds N, O and P) and three herds remained non-infected (herds K, L and M). The serum neutralizing antibody titers and the non-structural protein ELISA (NSP) antibody responses in sows and 1-month-old pigs in the infected herds were higher than in the non-infected herds, but over time a number of positive NSP reactors were detected. From the serological studies and the herd monitoring and investigations it was considered that the FMD NSP positive reactors may not have constituted a true reservoir of FMD virus infection especially in herds where susceptible pigs were no longer present post-exposure or post-vaccination. Pigs vaccinated with an unpurified FMD type O vaccines being used at that time also showed false positive responses for NSP antibodies.
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Affiliation(s)
- S P Chen
- Division of Animal Medicine, Animal Technology Institute Taiwan, Chunan, Miaoli, Taiwan
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18
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Chen SP, Lee MC, Sun YF, Cheng IC, Yang PC, Lin YL, Jong MH, Robertson ID, Edwards JR, Ellis TM. Immune responses of pigs to commercialized emulsion FMD vaccines and live virus challenge. Vaccine 2007; 25:4464-9. [PMID: 17445957 DOI: 10.1016/j.vaccine.2007.03.019] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2006] [Revised: 02/03/2007] [Accepted: 03/08/2007] [Indexed: 11/26/2022]
Abstract
The immune response to structural and non-structural proteins (NSPs) was studied on sequential serum samples in swine from O/Taiwan/97 FMDV challenge studies, outbreaks and after vaccination. The results showed that pigs vaccinated with a commercial vaccine prior to or after infection maintained high neutralizing antibody titers with gradual decline from peak titers over the duration of this study. However, neutralizing antibody titers in non-vaccinated pigs only reached moderate levels 2-4 weeks post infection and remained low thereafter. For the 3B and 3ABC NSP antibody ELISA responses, there were gradually decreasing levels of NSP antibody over time. In multiple vaccinations, all pigs showed significant increases in neutralizing antibodies after booster vaccination. For the 3B NSP antibody ELISA after vaccination, the mean S/P ratios for pigs vaccinated with all three FMD vaccines were all below the 0.23 cut-off value set by the manufacture, but some sera from individual vaccinated pigs gave results above this cut-off after primary or secondary vaccination. However, with the 3ABC NSP antibody ELISA, all sera from vaccinated pigs had negative results for NSP antibody for all time points.
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Affiliation(s)
- S P Chen
- Division of Animal Medicine, Animal Technology Institute Taiwan, Chunan, Miaoli, Taiwan
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19
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Chen SP, Ellis TM, Lee MC, Cheng IC, Yang PC, Lin YL, Jong MH, Robertson ID, Edwards JR. Comparison of sensitivity and specificity in three commercial foot-and-mouth disease virus non-structural protein ELISA kits with swine sera in Taiwan. Vet Microbiol 2007; 119:164-72. [PMID: 17112687 DOI: 10.1016/j.vetmic.2006.09.013] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2006] [Revised: 09/14/2006] [Accepted: 09/18/2006] [Indexed: 11/22/2022]
Abstract
Three commercialized ELISA kits for the detection of antibodies to the non-structural proteins (NSPs) of FMD virus were compared, using sera from uninfected, vaccinated, challenged and naturally infected pigs. The kinetics of the antibody response to NSPs was compared on sequential serum samples in swine from challenge studies and outbreaks. The results showed that ELISA A (UBI) and ELISA B (CEDI) had better sensitivity than that of the 3ABC recombinant protein-based ELISA C (Chekit). The peak for detection of antibodies to NSPs in ELISA C was significantly delayed in sera from natural infection and challenged swine as compared to the ELISA A and B. The sensitivity of the three ELISAs gradually declined during the 6-month post-infection as antibodies to NSP decline. ELISA kits A and B detected NSP antibody in 50% of challenged pigs by the 9-10th-day and 7-8th-day post-challenge, respectively. ELISA B and C had better specificity than ELISA A on sequential serum samples obtained from swine immunized with a type O FMD vaccine commercially available in Taiwan. Antibody to NSPs before vaccination was not detected in swine not exposed to FMD virus, however, antibody to NSPs was found in sera of some pigs after vaccination. All assays had significantly lower specificity when testing sera from repeatedly vaccinated sows and finishers in 1997 that were tested after the 1997 FMD outbreak. However, when testing sera from repeatedly vaccinated sows or finishers in 2003-2004, the specificity for ELISAs A, B and C were significantly better than those in 1997. This effect was less marked for ELISA A. The ELISA B was the best test in terms of the highest sensitivity and specificity and the lowest reactivity with residual NSP in vaccinates.
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Affiliation(s)
- S P Chen
- Division of Animal Medicine, Animal Technology Institute Taiwan, Chunan, Miaoli, Taiwan.
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20
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Wang Q, Sun GQ, Jiang LH, Xin Q, Sun SG, Jiang YX, Chen SP, Jusys Z, Behm RJ. Adsorption and oxidation of ethanol on colloid-based Pt/C, PtRu/C and Pt3Sn/C catalysts: In situ FTIR spectroscopy and on-line DEMS studies. Phys Chem Chem Phys 2007; 9:2686-96. [PMID: 17627312 DOI: 10.1039/b700676b] [Citation(s) in RCA: 143] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The interaction of colloid-based, carbon supported Pt/C (40 wt%), PtRu/C (45 wt%) and Pt3Sn/C (24 wt%) catalysts with ethanol and their performance for ethanol electrooxidation were investigated in model studies by electrochemical, in situ infrared spectroscopy and on-line differential electrochemical mass spectrometry measurements. The combined application of in situ spectroscopic techniques on realistic catalysts and under realistic reaction (DEMS, IR) and transport conditions (DEMS) yields new insight on mechanistic details of the reaction on these catalysts under the above reaction and transport conditions. Based on these results, the addition of Sn or Ru, though beneficial for the overall activity for ethanol oxidation, does not enhance the activity for C-C bond breaking. Dissociative adsorption of ethanol to form CO2 is more facile on the Pt/C catalyst than on PtRu/C and Pt3Sn/C catalysts within the potential range of technical interests (<0.6 V), but Pt/C is rapidly blocked by an inhibiting CO adlayer. In all cases acetaldehyde and acetic acid are dominant products, CO2 formation contributes less than 2% to the total current. The higher ethanol oxidation current density on the Pt3Sn/C catalyst at these potentials results from higher yields of C2 products, not from an improved complete ethanol oxidation to CO2.
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Affiliation(s)
- Q Wang
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
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21
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Lin JH, Chen SP, Yeh KS, Weng CN. Mycoplasma hyorhinis in Taiwan: Diagnosis and isolation of swine pneumonia pathogen. Vet Microbiol 2006; 115:111-6. [PMID: 16540266 DOI: 10.1016/j.vetmic.2006.02.004] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2004] [Revised: 02/06/2006] [Accepted: 02/06/2006] [Indexed: 11/25/2022]
Abstract
This study attempted to determine whether one multiplex polymerase chain reaction (PCR) is an effective adjunct method for diagnosing Mycoplasma hyopneumoniae and Mycoplasma hyorhinis infection, and whether M. hyorhinis should be considered as an enzootic pneumonia or porcine respiratory disease complex pathogen in Taiwan. To our knowledge, this study is the first to isolate and identify M. hyorhinis as a porcine pathogen in Taiwan. A novel isolation method and a multiplex PCR test were applied to detect and isolate M. hyorhinis. The correlation of M. hyorhinis with swine pneumonia was also examined using a challenge test. Based on weight, 18 pigs were assigned to three groups and housed throughout the study in a specific-pathogen-free (SPF) facility and provided with aseptic feed and water. Groups 1 (n=6) and 2 (n=6) were challenged with 5mL M. hyorhinis culture via tracheal intubation on day 1. The M. hyorhinis strains ATIT-1, -3, and-7 were used to infect group 1 and the strain ATCC 27717 was used for group 2. Culture medium was replaced by phosphate-buffered saline in group 3 (n=6). All pigs were slaughtered on day 28, and their lungs were removed for examination of lesions. Of the six pigs in group 1 challenged with wild-type strains, two had typical mycoplasma pneumonia lesions. No gross lung lesions were observed in groups 2 and 3. Although further examination is necessary to confirm that wild-type strains can cause pneumonia, it appears that M. hyopneumoniae is no longer the only mycoplasma pathogen implicated in the diagnosis of swine enzootic pneumonia (SEP).
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Affiliation(s)
- J H Lin
- Division of Animal Medicine, Animal Technology Institute Taiwan, Chunan, Miaoli, Taiwan, ROC
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22
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Liu XG, Chen SP, Kham SKY, Quah TC, Yeoh AEJ. In vitro drug sensitivity and expression profiling for disease prognostication in childhood acute lymphoblastic leukaemia (ALL): an exploratory model using cell lines. Ann Acad Med Singap 2004; 33:S21-2. [PMID: 15651190] [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: 05/01/2023]
Affiliation(s)
- X G Liu
- Department of Paediatrics, National University of Singapore, Singapore
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23
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Peng BG, Li QX, Ren TY, Ahmad S, Chen SP, Chen P, Lin X. Group i metabotropic glutamate receptors in spiral ganglion neurons contribute to excitatory neurotransmissions in the cochlea. Neuroscience 2004; 123:221-30. [PMID: 14667457 DOI: 10.1016/j.neuroscience.2003.09.010] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Evidence has accumulated over the years supporting glutamate as the primary neurotransmitter used by hair cells in afferent cochlear neurotransmission. Besides acting on ionotropic glutamate receptors, glutamate also activates second messenger systems via G-protein-coupled metabotropic glutamate receptors (mGluRs) to modulate neuronal excitability. However, it is unclear whether mGluRs participate in cochlear neurotransmission. We present evidence directly supporting a functional role for group I metabotropic glutamate receptors (mGluRIs) in spiral ganglion (SG) neurons. The presence of mGluRI and downstream G-protein subunits was demonstrated by molecular biology and immunolabeling methods. Direct activation of mGluRIs in cultured SG neurons resulted in transient increases of intracellular Ca(++) concentration and transient inward currents that gave rise to firings of multiple action potentials. These responses showed mGluRI pharmacological specificity and quickly desensitized. We next examined changes in cochlear function after noise exposure as a result of pharmacologically manipulating cochlear glutamate neurotransmission. These in vivo tests showed that blocking non-N-methyl-D-aspartic acid glutamate receptors was sufficient to eliminate compound action potentials of the auditory nerve, and pharmacologically inhibiting mGluRIs in the cochlea did not significantly affect the hearing threshold. In contrast, blocking mGluRIs lowered the amplitude of compound action potentials at louder sound levels and reduced the noise-induced temporary threshold shift. Our results suggest that although mGluRIs did not initiate fast excitatory cochlear neurotransmission, their activation contributed to the growth of excitatory responses of the cochlea. As a result, the cochlea was more resistant to noise-induced temporary hearing losses without the activation of mGluRIs in SG neurons.
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Affiliation(s)
- B G Peng
- Section on Neurobiology, Leslie and Susan Gonda Department of Cell and Molecular Biology, 2100 West Third Street, House Ear Institute, Los Angeles, CA 90057, USA
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24
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Chen SP, Cheung W, Heng CK, Jordan SC, Yap HK. Childhood nephrotic syndrome in relapse is associated with down-regulation of monocyte CD14 expression and lipopolysaccharide-induced tumour necrosis factor-alpha production. Clin Exp Immunol 2003; 134:111-9. [PMID: 12974763 PMCID: PMC1808845 DOI: 10.1046/j.1365-2249.2003.02252.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Interleukin-13 (IL-13) is a known modulator of monocyte function, down-regulating monocyte surface markers such as CD14 and proinflammatory cytokines. We have shown previously that lymphocyte IL-13 gene expression was up-regulated during relapses in children with steroid-responsive nephrotic syndrome (SRNS). In this study, we examined the monocyte mRNA expression and lipopolysaccharide (LPS)-stimulated intracellular production of tumour necrosis factor-alpha (TNF-alpha) and IL-8 in children with SRNS during relapse and remission. Additionally, we investigated CD14 mRNA levels, CD14 surface expression and its soluble component (sCD14) in serum. Our results showed that the percentages of TNF-alpha positive monocytes following LPS stimulation were significantly lower in nephrotic children in relapse (64.4 +/- 13.7%) compared to remission (81.6 +/- 9.0%, P < 0.005). This was associated with down-regulation of CD14 mRNA, as well as both membrane and sCD14 in patients with nephrotic relapse (82.9 +/- 10.1% and 1.23 +/- 0.30 micro g/ml, respectively) compared to remission (93.9 +/- 3.2% and 1.77 +/- 0.82 micro g/ml, respectively) (P < 0.003). Although we demonstrated a decrease in LPS-stimulated intracellular production of TNF-alpha in monocytes from patients with nephrotic relapse, we were unable to show a concomitant decrease in mRNA expression during relapses. This could be explained by down-regulation of gene expression at the translational rather than transcriptional level. In conclusion, it is conceivable that up-regulation of T-cell IL-13 production in children with active nephrotic relapse was associated with suppression of monocyte CD14 expression, down-regulating pro-inflammatory cytokine production, and could account for the increased susceptibility to bacterial sepsis seen in nephrotic children in active relapse.
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Affiliation(s)
- S P Chen
- Department of Pediatrics, National University of Singapore, Singapore
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25
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Ariffin H, Chen SP, Wong HL, Yeoh A. Validation of a multiplex RT-PCR assay for screening significant oncogene fusion transcripts in children with acute lymphoblastic leukaemia. Singapore Med J 2003; 44:517-20. [PMID: 15024455] [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: 04/29/2023]
Abstract
In childhood acute lymphoblastic leukaemia (ALL), cytogenetics play an important role in diagnosis, allocation of treatment and prognosis. Conventional cytogenetic analysis, involving mainly karyotyping in our experience, has not been successful in a large proportion of cases due to inadequate metaphase spreads and poor chromosome morphology. Our aim is to develop a highly sensitive and specific method to screen simultaneously for the four most frequent fusion transcripts resulting from specific chromosomal translocations, namely, both the CML- and ALLtype BCR-ABL transcripts of t(9;22), E2A-PBX1 transcript of t(1;19), the MLL-AF4 transcript of t(4;11) and TEL-AML1 (also termed ETV6-CBFA2) of the cryptic t(12;21). A multiplex reverse transcription polymerase chain reaction protocol (RT-PCR) was developed and tested out on archival bone marrow samples and leukaemia cell lines. In all samples with a known translocation detected by cytogenetic techniques, the same translocation was identified by the multiplex-PCR assay. Multiplex RT-PCR assay is an effective, sensitive, accurate and cost-effective diagnostic tool which can improve our ability to accurately and rapidly risk-stratify patients with childhood ALL.
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Affiliation(s)
- Hany Ariffin
- Paediatric Haematology-Oncology Unit, University of Malaya Medical Centre, 50603 Kuala Lumpur, Malaysia.
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26
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Loh LH, Chen SP, Quah TC, Yeoh AE, Ariffin H. Real-time quantitative polymerase chain reaction (RO-PCR) using the LightCycler: a rapid, high-throughput method for detecting and quantifying fusion transcripts in childhood leukaemias for disease stratification and prognostication. Ann Acad Med Singap 2003; 32:S18-21. [PMID: 14968721] [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: 04/28/2023]
Affiliation(s)
- L H Loh
- Division of Paediatric Haematology-Oncology, Children's Medical Institute, National University Hospital, National University of Singapore, 5 Lower Kent Ridge Road, Singapore 119074
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27
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Chung WB, Liao PC, Yang PC, Chen SP, Jong MH, Sheu TW. Surveillance of FMD virus non-structural protein antibodies in pig populations involved in an eradication programme. Vet Rec 2003; 152:595-7. [PMID: 12762489 DOI: 10.1136/vr.152.19.595] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Affiliation(s)
- W B Chung
- Department of Veterinary Medicine, National Pingtung University of Science and Technology, Pingtung, Taiwan
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28
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Chung WB, Liao PC, Chen SP, Yang PC, Lin YL, Jong MH, Sheu TW. Optimization of foot-and-mouth disease vaccination protocols by surveillance of neutralization antibodies. Vaccine 2002; 20:2665-70. [PMID: 12034091 DOI: 10.1016/s0264-410x(02)00201-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
An appropriate immunization program for pigs in a foot-and-mouth disease (FMD) endemic area was proposed based on data analysis obtained from serological surveillance in Taiwan, after an intensive vaccination program. To provide an adequate passive immunity for piglets, gilts that have completed two basic vaccinations must be boosted once before breeding. To achieve an efficient response to the FMD vaccine for piglets born to well vaccinated sows, vaccination need to be delayed until 10-12 weeks of ages for the first immunization, followed by a boost 4 weeks later.
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Affiliation(s)
- W B Chung
- Department of Veterinary Medicine, National Pingtung University of Science and Technology, Neipu, Pingtung, Taiwan, ROC.
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29
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Abstract
A new sesquiterpenoid, junceol A(1), as well as two known diterpenoids, sclerophytin A (2) and cladiellisin (3), have been isolated from the sea pen octocoral Virgularia juncea. The structure of metabolite 1 was determined by extensive spectral analysis. Compounds 1-3 have been shown to exhibit cytotoxicity toward P-388 cancer cells.
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Affiliation(s)
- S P Chen
- Department of Marine Resources, National Sun Yat-Sen University, Kaohsiung 804, Taiwan, Republic of China
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30
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Wang CY, Chang TY, Walfield AM, Ye J, Shen M, Zhang ML, Lubroth J, Chen SP, Li MC, Lin YL, Jong MH, Yang PC, Chyr N, Kramer E, Brown F. Synthetic peptide-based vaccine and diagnostic system for effective control of FMD. Biologicals 2001; 29:221-8. [PMID: 11851319 DOI: 10.1006/biol.2001.0302] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
We have designed synthetic peptides corresponding to two different regions of the genome of foot-and-mouth disease virus (FMDV) that are effective as (a) a vaccine or (b) a diagnostic reagent which differentiates convalescent from vaccinated animals, respectively. The peptide vaccine is based on a sequence from the prominent G-H loop of VP1, one of the four capsid proteins. The sequence was optimized by the inclusion of a cyclic constraint and adjoining sequences, and broader immunogenicity was obtained by the incorporation of consensus residues at hypervariable positions. The peptide also included a promiscuous T-helper epitope for effective immunogenicity in outbred populations of large animals.The diagnostic reagent, a peptide based on non-structural (NS) protein 3B, is used in immuno-assays for the detection of antibodies. Antibodies to this NS protein are present in the sera of infected animals but not in the sera of vaccinated animals. The VP1 peptide can be used in complementary immuno-assays for confirmation of NS test results and to monitor for vaccination. This system for differential diagnosis is important to establish the disease-free status of a country.
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Affiliation(s)
- C Y Wang
- United Biomedical Inc., 25 Davids Drive, Hauppauge, NY 11788, U.S.A.
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31
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Wu S, Shiao YM, Lai SM, Lai CY, Chen SP, Chen YF, Sidebottom DA, Hildebrand WH, Chou FC, Tsai MF. New DR5 sequences: a novel DRB1*11122 allele identified in Paiwan tribe members of Taiwan and a corrected sequence for the DRB1*1201 allele. Tissue Antigens 2001; 58:193-7. [PMID: 11703830 DOI: 10.1034/j.1399-0039.2001.580310.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
We report herein the identification of a new DRB1 allele using sequence-based typing (SBT). This novel allele, HLA-DRB1*11122, was found in an aboriginal individual (SWP71) from the Paiwan tribe in the southern part of Taiwan. This individual was typed by SBT method as having an HLA genotype of HLA-A*24021/24021, HLA-B*4001/4002, HLA-DRB1*11122/15011, HLA-DRB3*0202, and HLA-DRB5*01011. This new allele differs from DRB1*1112 in the polymorphic exon 2 only at codon 34 (CAA-->CAG; both specify glutamine) and from DRB1*1110 in the exon 2 sequence only at codon 32 (CAT-->TAT; H32T). The most likely candidate allele which is found in the aboriginal populations of Taiwan and which may mutate into this new allele is DRB1*11011. DRB1*11122 allele differs from DRB1*11011 allele in the polymorphic exon 2 at both codon 34 (CAA-->CAG) and codon 37 (TAC-->TTC; T37F). This novel HLA-DRB1*11122 allele was also found in another aboriginal individual (SWP90) from the same Paiwan tribe. This SWP90 individual was typed by SBT method as having an HLA genotype of HLA-A*24021/24021, HLA-B*4002/5502, HLA-DRB1*11122/1201, and HLA-DRB3*01011/0202. However, the original DRB1*1201 sequence from HERLUFF was found to be erroneously reported and the corrected sequence from SWP90 is now presented herein.
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Affiliation(s)
- S Wu
- Graduate Institute of Human Genetics/Department of Medical Technology, Tzu Chi University, #701, Chung Yang Rd. Section III, Hualien, Taiwan, Republic of China.
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32
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Chen SP, Zhang RY. [Studies on the triterpene sapogenins from Albizziae Cortex]. Yao Xue Xue Bao 2001; 32:144-7. [PMID: 11243201] [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
A new sapogenin named Julibrogenin A was isolated from the stem bark of Albizzia julibrissin Durazz (Albizziae Cortex). Based on chemical and spectral studies, their structure has been identified as 21-O-(2-hydroxymethyl-6-methyl-6-methoxyl-2,7-octadienoyl)-acacic acid. In addition, machaerinic acid lactone, machaerinic acid methylester, acacigenin B and julibrotriterpenoidal lactone A were also isolated from this plant and characterised.
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Affiliation(s)
- S P Chen
- Department of Phytochemistry, Beijing Medical University, Beijing, 100083
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33
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Chen SP, Zhang RY, Ma LB, Tu GZ. [Structure determination of three saponins from the stem bark of Albizzia julibrissin Durazz]. Yao Xue Xue Bao 2001; 32:110-5. [PMID: 11243193] [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
Three new saponins named Julibroside J1, J2 and J3 were isolated from the stem bark of Albizzia julibrissin Durazz (Albizziae Cortex). Based on chemical and spectral methods, e.g. 1H- and 13C-NMR, DEPT, COSY CH-COSY, TOCSY, HMQC-COSY, HMQC-TOCSY, NOESY, HMBC, their structures have been identified as; Julibroside J1 (one triterpene, nine sugars, two monoterpenes I); Julibroside J2(one triterpene, eight sugars two monoterpenes II); Julibroside J3(one triterpene, nine sugars two monoterpenes III).
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Affiliation(s)
- S P Chen
- Department of Phytochemistry, Beijing Medical University, Beijing 100083
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34
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Wu S, Shiao YM, Lai CY, Lai SM, Chen SP, Sidebottom DA, Hildebrand WH, Tilanus MG, Chou FC, Tsai MF. Polymorphism of human HLA-DRB1 antigens generated by genetic exchange between DR2 (DRB1*15011) and DR6 (DRB1*1405) alleles: a novel DRB1 allele (DRB1*1437) identified in a Paiwan tribe member of Taiwan. Tissue Antigens 2001; 57:384-7. [PMID: 11380954 DOI: 10.1034/j.1399-0039.2001.057004384.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
We report herein the identification of a new DRB1 allele using sequence-based typing (SBT). This novel allele, HLA-DRB1*1437, was found in an aboriginal individual from the Paiwan tribe in the southern part of Taiwan. This individual was typed by SBT method as having an HLA genotype of HLA-A*02011/0203, HLA-B*15011/3901, HLA-DRB1*11011/1437, HLA-DRB3*0202/0202, and HLA-DPB1*0501/1301. This new allele differs from DRB1*1309 in the 5'-end nucleotide sequence of polymorphic exon 2 at codon 16 (CAT-->CAA; H16Q), codon 37 (AAC-->TTC; R37F), codon 47 (TTC-->TAC; F47Y), and codon 58 (GCC-->GCT; both specify alanine). By sequence comparison, it was found that this new allele has a 5'-end sequence (from amino acid residues 7 to 66) identical to that found in the DRB1*1405 allele and a 3'-end sequence (from amino acid residues 58 to 94) identical to that found in the DRB1*15011 allele. Both DRB1*1405 and DRB1*15011 alleles have been identified among the Paiwan members (Note).
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Affiliation(s)
- S Wu
- Tzu Chi University, Hualien, Taiwan, Republic of China.
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35
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Chen SP, Tang GC. [Expression of bcl-2, c-myc genes and their relationship in patients with acute leukemia]. Hunan Yi Ke Da Xue Xue Bao 2001; 26:83-5. [PMID: 12536628] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
Abstract
OBJECTIVE This paper was to explore the expressions of bcl-2, c-myc genes and the relationship between them in bone marrow from patients with acute leukemia (AL). METHODS In situ hybridization was used to detect bcl-2 and c-myc mRNA. Immune cytochemistry was used to detect bcl-2 and c-myc protein. RESULTS The expressions of bcl-2, c-myc mRNA and proteins were significantly increased in AL; There were not significant differences in bcl-2 mRNA and protein, c-myc mRNA and protein between the patients with acute lymphocytic leukemia and acute nonlymphocytic leukemia; There were linear correlations between bcl-2 mRNA and bcl-2 protein, between c-myc mRNA and c-myc protein, between bcl-2 mRNA and c-myc mRNA, between bcl-2 protein and c-myc protein. CONCLUSION bcl-2 and c-myc genes play an important role in pathogenesis and the development of AL.
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Affiliation(s)
- S P Chen
- Department of Hematology, Xiangya Hospital, Central South University, Changsha 410078
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36
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Yu YW, Lin CH, Chen SP, Hong CJ, Tsai SJ. Intelligence and event-related potentials for young female human volunteer apolipoprotein E epsilon4 and non-epsilon4 carriers. Neurosci Lett 2000; 294:179-81. [PMID: 11072144 DOI: 10.1016/s0304-3940(00)01569-x] [Citation(s) in RCA: 70] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The apolipoprotein E (APOE) epsilon4 allele is associated with late-onset Alzheimer's disease and cognitive function in aging normal populations. To study the effect of the presence of the epsilon4 allele on cognitive function, we compared intelligence-test scores and component values for event-related potentials for epsilon4 and non-epsilon4 carriers in a group of 134 young females. The results demonstrate modest increases in performance intelligence quotient (IQ) and N100 amplitude for epsilon4 carriers (P=0.038 and 0.068, respectively). Our findings suggest that cognitive impairment, associated with the presence of the epsilon4 allele, is age-dependent and thus not probable for young women. The higher performance IQ scores demonstrated for epsilon4 carriers require further exploration.
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Affiliation(s)
- Y W Yu
- Yu's Psychiatric Clinic, Kaohsiung, Taiwan, ROC
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37
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Abstract
We use ab initio density-functional theory supplemented with the embedded-atom method to study the self-diffusion of small clusters on the (111) surface of eight fcc metals. A zigzag motion is found to be important in the dimer and tetramer diffusions. The dimer diffuses by a zigzag and concerted motion. The trimer diffuses by a concerted three-atom motion. The tetramer diffuses through a zigzag motion where only two atoms move simultaneously in each step. Thus, instead of increasing, the migration energy is lowered (or stays constant) for the tetramer as compared to that for the trimer. This novel break of the upwards trend in migration energy is predicted to be a general phenomenon.
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Affiliation(s)
- CM Chang
- National Center for High-Performance Computing, Hsinchu, Taiwan 30043, Republic of China
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Abstract
To competently deal with changes in the health care system, health professionals for the future must have expanded abilities and new attitudes. Education of health professionals for community-oriented health care (COHC) is being promoted as one approach to achieve this focus. This article reports on the development and testing of the Community-Oriented Health Care Competency Scale, which measures knowledge, attitudes, and intention to practice COHC. Results of testing demonstrate adequate reliability for a new instrument: an alpha coefficient of .95 for the Knowledge subscale, .68 for the Attitude subscale, and .93 for the Intention to Practice subscale. Content Validity of the instrument is based on the literature review, focus group sessions, and expert opinion. The instrument may be used to assess competency of health professions students in COHC, but continued testing is needed.
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Affiliation(s)
- S P Chen
- Department of Public Health, Mental Health and Administrative Nursing, College of Nursing, University of Illinois at Chicago, 60612-7350,
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39
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Chen SP, Chen EH. Application of modified CHIP-AE in a vocational high school. ABNF J 1999; 10:104-10. [PMID: 10795175] [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: 02/16/2023]
Abstract
Adolescent health behaviors tend to cluster and vary by such factors as grade, age, and racial/ethnic background. A population-based instrument was needed to assess health behaviors of the students in a vocational high school in the City of Chicago. To reduce respondent burden, Child Health and Illness Profile--Adolescent Edition (CHIP-AE) was modified by omitting seven subdomains. Ninety-three boys and 245 girls voluntarily participated in the study. Pearson correlation coefficients, MANOVA, and ANOVA were used in data analysis. Modified CHIP-AE was found to have acceptable reliability and detect the expected differences of adolescent health behaviors by gender and age. Modified CHIP-AE can be used to assess adolescent health behaviors in an urban vocational high school. It can also be used to target the subgroups of students with specific needs for health services.
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Affiliation(s)
- S P Chen
- College of Nursing, University of Illinois at Chicago, USA
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Abstract
PURPOSE The purpose of this study was to describe adolescent fatherhood from the perspectives of these young men's mothers. DESIGN A descriptive qualitative design was chosen because of the exploratory nature of this study. METHODS Data collection and analysis were guided by naturalistic inquiry that permits theory to emerge from the data. The data were collected during a 1-hour focus group interview performed at a public high school located proximal to a large public housing project in a large Midwestern city. Five mothers of adolescent fathers were recruited from a variety of sources using a modified snowball approach. RESULTS The seven major themes that emerged from the data were: barriers to fatherhood, value of fatherhood, transition to fatherhood, competencies of fatherhood, role-set relationships, social norms of fatherhood, and father-child contact. These women indicated that they felt their sons' youth influenced every aspect of the fatherhood experiences. CLINICAL IMPLICATIONS Nurses who work with adolescent parents are ideally situated to encourage the support of adolescent fathers and their families. Future research should identify methods useful for supporting or discouraging paternal involvement of adolescent fathers, and effective intervention strategies for adolescent fathers and their families.
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Affiliation(s)
- C M Dallas
- Department of Maternal/Child Nursing, University of Illinois at Chicago, College of Nursing 60613-7350, USA.
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Chiu YT, Liu SK, Liu M, Chen SP, Lin YH, Mao SJ, Chu R. Characterization and quantitation of extracellular collagen matrix in myocardium of pigs with spontaneously occurring hypertrophic cardiomyopathy. Cardiovasc Pathol 1999; 8:169-75. [PMID: 10722240 DOI: 10.1016/s1054-8807(98)00031-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The extracellular matrix between cardiocytes has been suggested to play an important role in maintaining the structure and function of the heart. The purpose of this study was to elucidate the morphological changes in the collagen of the extracellular matrix (ECM) in the hearts of pigs with hypertrophic cardiomyopathy. Sixty pigs diagnosed with hypertrophic cardiomyopathy from 605 purebred Landrace pigs ages 6 to 9 months were used in this study. Morphologically, these pigs with hypertrophic cardiomyopathy had increased heart weight and heart-to-body weight ratio, thickening of the left ventricular (LV) and right ventricular (RV) free walls and septum, disorientation of cardiocytes, myocardial fibrosis, and intramural coronary arteriosclerosis. Similar observations have been described in our preliminary report (Cardiovasc Pathol 3:261, 1994). In the present study, we have modified the silver impregnation technique to stain paraffin-embedded sections to demonstrate three types of ECM. There were endomysial struts, perimysial weaves, and epimysial coils in the myocardium. The light microscopic findings of the struts, weaves, and coils were also confirmed by scanning electromicroscopic examination. The numbers of these fine structures were increased significantly in the pigs with hypertrophic cardiomyopathy. In addition, the amounts of collagen in the LVs, RVs, and septum (Sep) in pigs with hypertrophic cardiomyopathy (LV = 19.37+/-0.79, RV = 23.72+/-0.72, Sep = 20.38+/-0.94 microg/mg, n = 60) were significantly higher (p < 0.01) than that in similar areas of normal pigs (LV = 14.56+/-1.11, RV = 18.90+/-1.02, Sep = 14.99+/-1.33 microg/mg, n = 30, respectively). Our findings of an overall increase of collagen content suggested that the accumulation of collagen matrix might be another factor responsible for the diastolic dysfunction of hypertrophic cardiomyopathy. These results might also infer that the increased collagen matrix could contribute to the stiffness of the cardiac chambers, thereby markedly affecting systolic and diastolic function of the heart. These observations provide further support that the pig may be an animal model for human cardiovascular disease.
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Affiliation(s)
- Y T Chiu
- Cardiovascular Center, Pig Research Institute Taiwan, Chunan, Republic of China
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42
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Abstract
Social and cultural factors influence the experience of fatherhood. This descriptive focus-group study describes the lived experience of fatherhood from the perspectives of 5 unmarried, low-income, African American adolescent fathers in a Midwestern urban area. Naturalistic inquiry approach guided the study. Seven themes of fatherhood emerged: barriers to fatherhood, value of fatherhood, introduction to fatherhood, competencies of fatherhood, role-set relationships, social norms of fatherhood, and father-child contact. This study suggests that nurses should support the involvement of adolescent fathers with their children. Future study may determine the influence of adult female family members on the decisions of adolescent fathers to remain involved with their children.
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Affiliation(s)
- C M Dallas
- Department of Maternal/Child Nursing, College of Nursing, University of Illinois, Chicago 60612-7350, USA
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43
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Hong OS, Chen SP, Conrad KM. Noise induced hearing loss among male airport workers in Korea. AAOHN J 1998; 46:67-75. [PMID: 9526275] [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: 02/06/2023]
Abstract
The purposes of this study of airport workers were to a) determine the prevalence and symptoms of hearing loss, and b) identify compliance in using hearing protective devices (HPDs) and its relationship with hearing loss. This cross sectional epidemiological study was conducted with 255 noise exposed and 195 non-noise exposed, full time, male workers at a large metropolitan airport in Seoul, Korea. The three measures used were the self administered Occupational Hearing Questionnaire (OHQ), an audiological assessment, and a record review of baseline hearing and noise levels of locations in which the employee worked. The results showed a significant difference in prevalence of hearing loss (more than 25dB) between the noise and the non-noise exposed groups (p < .05). About 60.8% of noise exposed workers reported continuous use of the HPDs. The continuous HPD users had significantly lower rates of hearing loss than the occasional users or non-users. The major symptom for workers with low frequency hearing loss was trouble in communication, whereas tinnitus and fullness in the ear were the most common symptoms for the workers with high frequency hearing loss. The airport workers exposed to excessive noise had a great deal of high frequency hearing loss. The degree of hearing loss present reinforces the need for aggressive hearing conservation programs among airport workers exposed to noise.
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Affiliation(s)
- O S Hong
- School of Nursing, University of Michigan, Ann Arbor, MI, USA
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Lu JH, Chiu YT, Sung HW, Hwang B, Chong CK, Chen SP, Mao SJ, Yang PZ, Chang Y. XTT-colorimetric assay as a marker of viability in cryoprocessed cardiac valve. J Mol Cell Cardiol 1997; 29:1189-94. [PMID: 9160870 DOI: 10.1006/jmcc.1996.0354] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
This study sought to evaluate the use of tetrazolium salt XTT reduction as an indicator of valvular viability in a cryoprocessed porcine cardiac homograft model. The XTT tetrazolium assays was based on the metabolic reduction of Sodium 3'-[1-(phenylamino-carbonyl)-3,4-Tetrazolium]-bis(4-methoxy-6-nitro) benzene sulfonic acid hydrate. The relationship between XTT reduction and: (1) leaflet tissue with various weight (n = 24); (2) morphometric evaluation (n = 30); (3) cadaveric ischemic intervals (n = 30); (4) freeze-thawing (n = 30) has been studied. The measurement of XTT reduction were significantly correlated with the weight of cardiac leaflets, in the range of 30 to 180mg (y=0.015x-0.063; r=0.99). Compared to morphometry of valvular damage, the reduction of mitochondrial enzymatic activity in cardiac leaflets was correlated with matrix cells without irreversible damage (r=0.89, P<0.005). The depletion of XTT reduction occurred dependent of ischemic time intervals. In general, freeze-thawing reduced more than 20% activity of mitochondrial dehydrogenase. We concluded that XTT tetrazolium assay is highly sensitive to determine valvular injury. The study demonstrated its potential for testing of cryopreserved cardiac valve.
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Affiliation(s)
- J H Lu
- Homograft Laboratory, Veterans General Hospital-Taipei, Taiwan, R.O.C
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45
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Samo DG, Chen SP, Crampton AR, Chen EH, Conrad KM, Egan L, Mitton J. Validity of three lumbar sagittal motion measurement methods: surface inclinometers compared with radiographs. J Occup Environ Med 1997; 39:209-16. [PMID: 9093972 DOI: 10.1097/00043764-199703000-00010] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Three surface methods for measuring lumbar sagittal motion (LSM) were tested for validity using radiographs as the "gold standard" reference. The three methods used were the Pleurimeter V double inclinometer, the carpenter double inclinometer, and the computerized sensor single inclinometer. In this study, 30 volunteers were examined independently by three occupational health professionals. Each volunteer rotated twice through three stations at which LSM was measured by each of the three methods. Radiographs were made during the first rotation. Predictability of the skin marks of T12 and S1 for the corresponding bone measures was acceptable for one examiner, mixed for another, and unacceptable for a third. The intraclass correlation coefficients (ICCs) ranged from 0.81 to 0.99, with half above the acceptable level of 0.90. However, the skin marks and the bone measures showed a linear relationship for all examiners (r > or = 0.89). For flexion and extension, all ICCs between the radiograph and each surface method were far below 0.90, indicating poor validity for each surface method. We concluded that skin placement of T12 and S1 has a linear relationship to bony landmarks, and that each of the tested surface methods does not validly measure LSM.
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Affiliation(s)
- D G Samo
- Occupational Medicine Evanston/Glenbrook Associates, Glenview, Ill 60025, USA
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46
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Chen SP, Samo DG, Chen EH, Crampton AR, Conrad KM, Egan L, Mitton J. Reliability of three lumbar sagittal motion measurement methods: surface inclinometers. J Occup Environ Med 1997; 39:217-23. [PMID: 9093973 DOI: 10.1097/00043764-199703000-00011] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Three surface methods for measuring lumbar sagittal motion (LSM) were tested for reliability. The three methods used were the Pleurimeter V double inclinometer, the carpenter double inclinometer, and the computerized single sensor inclinometer. In this study, 30 volunteers were examined independently by three occupational health professionals. Each volunteer rotated twice through three stations at which LSM was measured by each of the three methods. The intra- and interexaminer reliabilities in identifying the skin levels of T12 and S1 were acceptable, having intraclass correlation coefficients (ICC) greater than or equal to 0.75. With a single exception, all ICC values for the intraexaminer reliability of LSM measurements fell below 0.90 (a clinically desirable level). The interexaminer reliability was poor, with all ICC values below 0.75. The largest source of measurement error was attributable to the examiner and its associated factors. We concluded that the intra- and interexaminer reliabilities varied greatly, limiting the clinical usefulness of the three surface methods.
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Affiliation(s)
- S P Chen
- College of Medicine, University of Illinois at Chicago, USA
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Ormeci A, Chu F, Wills JM, Mitchell TE, Albers RC, Thoma DJ, Chen SP. Total-energy study of electronic structure and mechanical behavior of C15 Laves phase compounds: NbCr2 and HfV2. Phys Rev B Condens Matter 1996; 54:12753-12762. [PMID: 9985131 DOI: 10.1103/physrevb.54.12753] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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49
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Liu ZT, Wang LS, Chen SP, Li W, Yu HX. Analysis and prediction of structure-reactive toxicity relationships of substituted aromatic compounds. Bull Environ Contam Toxicol 1996; 57:421-425. [PMID: 8672057 DOI: 10.1007/s001289900207] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Affiliation(s)
- Z T Liu
- Institute of Ecology, Chinese Research Academy of Environmental Sciences, Beiyuan, 100012, Beijing, People's Republic of China
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50
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Abstract
Naturally occurring hypertrophic cardiomyopathy (HCM) in pigs in generally characterized by unexplained cardiac hypertrophy with abnormal histological features (Liu et al., 1994; Dai et al., 1995). The histological alterations in HCM-affected hearts are characteristic, and can be used to diagnose the disease (Dai et al., 1995). Briefly, these are marked disorientation of cardiac muscle cells, thickening of the intramural coronary arterial wall with a narrowing of the lumen, endocardial and myocardial fibrosis. A high incidence of HCM in a population of pigs strongly suggests a hereditary basis and the Pig Research Institute, Taiwan has, therefore, endeavoured to produce a specific strain of HCM pigs. The purpose of the present study was to determine the ultrastructural changes occurring in pigs with naturally occurring HCM.
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Affiliation(s)
- K S Dai
- Department of Comparative Medicine, Pig Research Institute Taiwan, Miaoli, Republic of China
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