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Yang JA, Choi HS, Bae EH, Ma SK, Kim SW, Kim CS. Torsade de pointes in initiating hemodialysis: a case report. Ann Palliat Med 2020; 9:1264-1268. [DOI: 10.21037/apm.2020.04.29] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Accepted: 03/04/2020] [Indexed: 11/06/2022]
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Yang JA, Lee JS, Park JK, Lee EB, Song YW, Lee EY. Clinical characteristics associated with occurrence and poor prognosis of interstitial lung disease in rheumatoid arthritis. Korean J Intern Med 2019; 34:434-441. [PMID: 28352064 PMCID: PMC6406107 DOI: 10.3904/kjim.2016.349] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/15/2016] [Accepted: 05/03/2016] [Indexed: 01/01/2023] Open
Abstract
BACKGROUND/AIMS To analyze clinical characteristics of interstitial lung disease (ILD) associated with rheumatoid arthritis (RA), especially in patients with poor prognosis. METHODS Seventy-seven RA patients with ILD and 231 age, sex, and disease duration-matched RA patients without ILD were enrolled in this retrospective study. Epidemiologic, clinical, and laboratory information were obtained through a medical chart review. Logistic regression analysis was used to estimate the risk of mortality in RA patients with ILD. RESULTS Compared to the RA without ILD group, the RA with ILD group had significantly higher titers of rheumatoid factor and the anti-cyclic citrullinated peptide (p = 0.001 for both), higher levels of C-reactive protein (CRP) at the time of RA diagnosis (p = 0.014), and a higher erythrocyte sedimentation rate (p = 0.022) and CRP levels (p < 0.001) throughout the 10-year follow-up period. These patients also received a higher mean daily dose of corticosteroids (p < 0.001). In the subgroup analysis of RA patients with ILD, 28 patients (36.4%) died during follow-up. Multivariate analysis revealed that older age at the time of ILD diagnosis was significantly associated with mortality. Usual interstitial pneumonia (UIP) subtype on high-resolution computed tomography (HRCT) was also suggested as a poor prognostic factor. CONCLUSION The survival of RA patients with ILD is adversely affected by age at the time of ILD diagnosis. RA-ILD patients diagnosed after age 65 or with a UIP subtype on HRCT may have a poor prognosis.
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Affiliation(s)
- Ji Ae Yang
- Division of Rheumatology, Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - Jeong Seok Lee
- Division of Rheumatology, Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
| | | | | | | | - Eun Young Lee
- Correspondence to Eun Young Lee, M.D. Division of Rheumatology, Department of Internal Medicine, Seoul National University College of Medicine, 101 Daehak-ro, Jongno-gu, Seoul 03080, Korea Tel: +82-2-2072-0852 Fax: +82-2-762-9662 E-mail:
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Lee JH, Yang JA, Shin K, Lee GH, Lee WW, Lee EY, Song YW, Lee EB, Park JK. Elderly Patients Exhibit Stronger Inflammatory Responses during Gout Attacks. J Korean Med Sci 2017; 32:1967-1973. [PMID: 29115078 PMCID: PMC5680495 DOI: 10.3346/jkms.2017.32.12.1967] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/23/2017] [Accepted: 09/16/2017] [Indexed: 11/20/2022] Open
Abstract
Gout attacks are often accompanied by systemic inflammatory response. The aim of the retrospective study was to compare gout patients in different age groups in terms of their clinical features at gout attacks. Patients, who were treated for gout attack in two tertiary medical centers between January 2000 and April 2014, were divided into young (≤ 50 years), middle-aged, and elderly (> 65 years) groups. Patients in three age groups were compared in terms of presence of fever (> 37.8°C), C-reactive protein (CRP) levels, and erythrocyte sedimentation ratio (ESR) at the gout attacks. Monocytes, which were isolated from 10 consecutive patients who previously experienced gout attacks, were stimulated with monosodium urate (MSU) crystals and cytokine production was measured by flow cytometry. Among 254 patients analyzed in this study, 48 were young, 65 were middle-aged, and 141 were elderly. The elderly patients were more likely to have fever (51.1%) during the attack than the young (20.8%) and middle-aged (30.8%) patients (P < 0.001 by χ² test). They were also more likely to have higher ESR and CRP levels than the young patients (P = 0.002 for ESR, P < 0.001 for CRP). Patients' age correlated significantly with CRP and ESR levels (both P < 0.001). After stimulation with MSU, the production of interleukin-1β by monocytes increased with patients' age (r = 0.670, P = 0.03). In conclusion, gout attacks in elderly patients are associated with fever and higher ESR and CRP levels, often resembling a septic arthritis.
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Affiliation(s)
- Jae Hyun Lee
- Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea
| | - Ji Ae Yang
- Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea
| | - Kichul Shin
- Department of Internal Medicine, Seoul Metropolitan Government-Seoul National University Boramae Medical Center, Seoul, Korea
| | - Ga Hye Lee
- Department of Microbiology and Immunology, Seoul National University College of Medicine, Seoul, Korea
- Department of Biomedical Sciences, Seoul National University College of Medicine, Seoul, Korea
| | - Won Woo Lee
- Department of Microbiology and Immunology, Seoul National University College of Medicine, Seoul, Korea
- Department of Biomedical Sciences, Seoul National University College of Medicine, Seoul, Korea
| | - Eun Young Lee
- Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea
| | - Yeong Wook Song
- Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea
- WCU Department of Molecular Medicine and Biopharmaceutical Sciences, Medical Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - Eun Bong Lee
- Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea
| | - Jin Kyun Park
- Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea
- WCU Department of Molecular Medicine and Biopharmaceutical Sciences, Medical Research Institute, Seoul National University College of Medicine, Seoul, Korea.
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Kwon HM, Lee SJ, Yang JA, Choi Y, Park JK, Lee EY, Song YW, Lee EB. Risk of Herpes Zoster in Patients with Rheumatoid Arthritis Undergoing Biologic Disease-Modifying Therapy. J Rheum Dis 2017. [DOI: 10.4078/jrd.2017.24.4.220] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Hyun Mi Kwon
- Division of Rheumatology, Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - Sang Jin Lee
- Division of Rheumatology, Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - Ji Ae Yang
- Division of Rheumatology, Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - Yunhee Choi
- Division of Medical Statistics, Medical Research Collaborating Center, Seoul National University College of Medicine, Seoul, Korea
| | - Jin Kyun Park
- Division of Rheumatology, Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - Eun Young Lee
- Division of Rheumatology, Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - Yeong Wook Song
- Division of Rheumatology, Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - Eun Bong Lee
- Division of Rheumatology, Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
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Yang JA, Choi JY, Kang EH, Ha YJ, Lee YJ, Song YW. Clinical and Genetic Features of Korean Patients with Recurrent Fever and Multi-System Inflammation without Infectious or Autoimmune Evidence. J Korean Med Sci 2016; 31:196-201. [PMID: 26839472 PMCID: PMC4729498 DOI: 10.3346/jkms.2016.31.2.196] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/28/2015] [Accepted: 10/07/2015] [Indexed: 12/27/2022] Open
Abstract
Autoinflammatory disease (AID) is a newly proposed category of disorders characterized by unprovoked episodes of inflammation without any infectious or autoimmune evidence. We aimed to characterize the clinical and genetic features of patients who had recurrent fever and multi-system inflammation but remain unclassified for any established AIDs. Medical records of 1,777 patients who visited our Rheumatology Clinic between March 2009 and December 2010 were reviewed to identify those who met the following criteria; 1) presence of fever, 2) inflammation in two or more organ systems, 3) recurrent nature of fever or inflammation, 4) no evidence of infection or malignancy, 5) absence of high titer autoantibodies, and 6) failure to satisfy any classification criteria for known AIDs. Genotyping was performed for common missense variants in MEFV, NOD2/CARD15, and TNFRSF1A. A small number of patients (17/1,777, 0.95%) were identified to meet the above criteria. Muco-cutaneous and musculoskeletal features were most common, but there was a considerable heterogeneity in symptom combination. Although they did not satisfy any established classification criteria for AIDs, substantial overlap was observed between the clinical spectrum of these patients and known AIDs. According to the newly proposed Eurofever criteria for periodic fevers, eleven of them were classified as TNF receptor-associated periodic syndrome and two as mevalonate kinase deficiency. However, no examined genetic variants including those in TNFRSF1A were found in these patients. A new set of classification criteria needs to be developed and validated for Asian patients with unclassified AIDs.
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Affiliation(s)
- Ji Ae Yang
- Division of Rheumatology, Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Ji Yong Choi
- Division of Rheumatology, Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea
| | - Eun Ha Kang
- Division of Rheumatology, Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Korea
| | - You-Jung Ha
- Division of Rheumatology, Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Yun Jong Lee
- Division of Rheumatology, Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Yeong Wook Song
- Division of Rheumatology, Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea
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Kan XH, Zhang LX, Yang JA, Zhang J, Chiang CY. Mobilising elementary and secondary school students for tuberculosis case finding in Anhui, China. Public Health Action 2015; 2:152-6. [PMID: 26392976 DOI: 10.5588/pha.12.0043] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2012] [Accepted: 08/31/2012] [Indexed: 11/10/2022] Open
Abstract
OBJECTIVES To evaluate the implementation of a FIDELIS (Fund for Innovative DOTS Expansion through Local Initiatives to Stop TB) project in Anhui Province, China. DESIGN A survey card was designed for students to identify individuals who might have tuberculosis (TB) in their family. Teachers provided health education on TB before distributing the survey cards. Survey cards identifying individuals with respiratory symptoms for ≥3 weeks were sent by the teachers to village doctors who were trained to visit symptomatic individuals and advise them to undergo sputum examination. Data were routinely collected in the implementation of the FIDELIS project, and quarterly reports from the National Tuberculosis Programme were analysed. The detection of new smear-positive TB cases before and after FIDELIS, as well as with and without FIDELIS, were compared. RESULTS In the first year, a total of 2 387 405 students were involved and 23 079 symptomatic individuals were examined, among whom 2307 (10.3%) were diagnosed with smear-positive TB. Case detection in FIDELIS counties increased by a factor of 3.5 during the FIDELIS period compared with before FIDELIS, and that in non-FIDELIS counties by a factor of 3.1 (P = 0.001). CONCLUSION It was feasible to massively mobilise students for TB case finding through collaboration between the health care and education systems.
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Affiliation(s)
- X H Kan
- Anhui Provincial Tuberculosis Institute, Anhui, China
| | - L X Zhang
- The Union China Office, Beijing, China ; Beijing Research Institute for Tuberculosis Control, Beijing, China
| | - J A Yang
- Anhui Provincial Tuberculosis Institute, Anhui, China
| | - J Zhang
- Anhui Provincial Tuberculosis Institute, Anhui, China
| | - C-Y Chiang
- International Union Against Tuberculosis and Lung Disease, Paris, France ; Division of Pulmonary Medicine, Department of Internal Medicine, Wan Fang Hospital, Taipei Medical University, Taipei, Taiwan ; Department of Internal Medicine, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
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Chang SH, Park JK, Lee YJ, Yang JA, Lee EY, Song YW, Lee EB. Comparison of cancer incidence among patients with rheumatic disease: a retrospective cohort study. Arthritis Res Ther 2014; 16:428. [PMID: 25163486 PMCID: PMC4295295 DOI: 10.1186/s13075-014-0428-x] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2013] [Accepted: 08/14/2014] [Indexed: 12/13/2022] Open
Abstract
Introduction Rheumatic diseases (RDs) are associated with different cancers; however, it is unclear whether particular cancers are more prevalent in certain RDs. In the present study, we examined the relative incidence of several cancers in a single homogeneous cohort of patients with different RDs. Methods Patients (N = 3,586) diagnosed with rheumatoid arthritis (RA), systemic lupus erythematosus (SLE), systemic sclerosis (SSc), dermatomyositis (DM) or polymyositis were included. Cancer diagnosis was based on histopathology. The 2008 Korean National Cancer Registry served as the reference for calculating standardized incidence ratios (SIRs). Results During the follow-up period of 31,064 person-years, 187 patients developed cancer. RA and SLE patients showed an increased risk of non-Hodgkin’s lymphoma (SIR for RA patients = 3.387, 95% confidence interval (CI) = 1.462 to 6.673; SIR for SLE patients = 7.408, 95% CI = 2.405 to 17.287). SLE patients also had a higher risk of cervical cancer (SIR = 4.282, 95% CI = 1.722 to 8.824). SSc patients showed a higher risk of lung cancer (SIR = 4.917, 95% CI = 1.977 to 10.131). Endometrial cancer was increased only in patients with DM (SIR = 30.529, 95% CI = 3.697 to 110.283). RA patients had a lower risk for gastric cancer (SIR = 0.663, 95% CI = 0.327 to 0.998). The mean time between the RD and cancer diagnoses ranged from 0.1 to 16.6 years, with the shortest time observed in patients with DM (2.0 ± 2.1 years). Conclusions Different RDs are associated with particular cancers. Thus, cancer surveillance tailored to specific RDs might be beneficial. Electronic supplementary material The online version of this article (doi:10.1186/s13075-014-0428-x) contains supplementary material, which is available to authorized users.
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Liu YH, Zhou YW, Yang JA, Tu ZG, Ji SY, Huang ZY, Zhou ZJ. Gene polymorphisms associated with susceptibility to coronary artery disease in Han Chinese people. Genet Mol Res 2014; 13:2619-27. [PMID: 24782050 DOI: 10.4238/2014.april.8.4] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
This study investigated 5 single nucleotide polymorphism (SNP) haplotypes in susceptibility genes for coronary artery disease (CAD) and the putative involvement of these SNPs in CAD in the Chi-nese Han population. From March 2008 to June 2009, we selected 119 CAD patients and 115 subjects not related to the CAD of Chinese Han or-igin as controls. The SNP genotypes were performed by multiplex SNaP-shot technology. The HNRPUL1 gene rs11881940T and GATA2 gene rs3803T loci were highly correlated with CAD (P < 0.05). rs10757278G increased the risk of CAD in patients indicated by an odds ratio (OR) = 1.242 [95% confidence interval (CI) = 1.04-1.49]; rs11881940T and rs3803T were protective factors for CAD with ORs = 0.767 (95%CI = 0.61-0.97) and 0.53 (95%CI = 0.40-0.72), respectively. Analysis of the rs10757278, rs11881940 and rs3803 loci showed that haplotypes ATC (OR = 4.26; 95%CI = 2.85-6.40, P < 0.01), GAC (OR = 1.50; 95%CI = 1.25-1.81, P < 0.01) and GAT (OR = 1.53; 95%CI = 1.12-2.09, P < 0.01) were CAD risk factors, whereas GTC was protective (OR = 0.48; 95%CI = 0.32-0.72, P < 0.01). ATC and glucose were positively correlated (OR = 1.91; 95%CI = 1.01-3.61, P < 0.05). GAT was a risk factor for hyper-tension (OR = 2.86; 95%CI = 1.40-5.83, P < 0.01). In conclusion, poly-morphisms and haplotype analysis of susceptibility genes for CAD can improve predicting this disease and will enable early diagnosis of CAD.
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Affiliation(s)
- Y H Liu
- Department of Laboratory Medicine, Sun Yat-sen Cardiovascular Hospital, Shenzhen, Guangdong, China
| | - Y W Zhou
- Department of Laboratory Medicine, Sun Yat-sen Cardiovascular Hospital, Shenzhen, Guangdong, China
| | - J A Yang
- Department of Cardiac Surgery, Sun Yat-sen Cardiovascular Hospital, Shenzhen, Guangdong, China
| | - Z G Tu
- Department of Laboratory Medicine, Chongqing Medical University, Chongqing, China
| | - S Y Ji
- Department of Cardiac Surgery, Sun Yat-sen Cardiovascular Hospital, Shenzhen, Guangdong, China
| | - Z Y Huang
- Department of Cardiac Surgery, Sun Yat-sen Cardiovascular Hospital, Shenzhen, Guangdong, China
| | - Z J Zhou
- Department of Laboratory Medicine, Sun Yat-sen Cardiovascular Hospital, Shenzhen, Guangdong, China
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Lee SJ, Yang JA, Park JW, Ko DJ, Kwon HM, Moon JY, Kim YK, Choi YH, Lee EY. A Case of Relapsing Polychondritis Improved by Infliximab Treatment. J Rheum Dis 2014. [DOI: 10.4078/jrd.2014.21.3.166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Sang Jin Lee
- Department Internal Medicine, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea
| | - Ji Ae Yang
- Department Internal Medicine, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea
| | - Jun Won Park
- Department Internal Medicine, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea
| | - Dong Jin Ko
- Department Internal Medicine, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea
| | - Hyun Mi Kwon
- Department Internal Medicine, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea
| | - Jin Young Moon
- Department Internal Medicine, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea
| | - Young Ki Kim
- Department Internal Medicine, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea
| | - Young Hoon Choi
- Department Internal Medicine, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea
| | - Eun Young Lee
- Department Internal Medicine, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea
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Chang SH, Yang JA, Lee SJ, Park JW, Shin K, Lee EB, Song YW, Lee EY. Treatment with Rituximab in a Patient with Refractory Felty Syndrome and Low Rheumatoid Arthritis Disease Activity: A Case Report. J Rheum Dis 2014. [DOI: 10.4078/jrd.2014.21.1.35] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Sung Hae Chang
- Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea
| | - Ji Ae Yang
- Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea
| | - Sang Jin Lee
- Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea
| | - Jun Won Park
- Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea
| | - Kichul Shin
- Department of Internal Medicine, Seoul National University Borame Hospital, Seoul, Korea
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - Eun Bong Lee
- Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - Yeong Wook Song
- Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - Eun Young Lee
- Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
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Shin K, Kim JW, Moon KW, Yang JA, Lee EY, Song YW, Lee EB. The Efficacy of Diacerein in Hand Osteoarthritis: A Double-Blind, Randomized, Placebo-Controlled Study. Clin Ther 2013; 35:431-9. [DOI: 10.1016/j.clinthera.2013.02.009] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2012] [Revised: 02/06/2013] [Accepted: 02/09/2013] [Indexed: 01/01/2023]
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Yang JA, Lee SJ, Park JW, Kwon HM, Moon JY, Ko DJ, Chang SH, Park JK, Lee EB, Song YW, Lee EY. Rituximab Treatment for the Patients with Refractory Inflammatory Myopathy. J Rheum Dis 2013. [DOI: 10.4078/jrd.2013.20.5.303] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Ji Ae Yang
- Division of Rheumatology, Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - Sang Jin Lee
- Division of Rheumatology, Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - Jun Won Park
- Division of Rheumatology, Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - Hyun Mi Kwon
- Division of Rheumatology, Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - Jin Young Moon
- Division of Rheumatology, Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - Dong Jin Ko
- Division of Rheumatology, Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - Sung Hae Chang
- Division of Rheumatology, Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - Jin Kyun Park
- Division of Rheumatology, Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - Eun Bong Lee
- Division of Rheumatology, Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - Yeong Wook Song
- Division of Rheumatology, Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - Eun Young Lee
- Division of Rheumatology, Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
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Yang JA, Chen X, Yu YF. [HOE642 (Cariporide) reduces the intracellular calcium overload of isolated immature rabbit ventricular myocytes induced by anoxia/reoxygenation]. Zhongguo Ying Yong Sheng Li Xue Za Zhi 2001; 17:240-243. [PMID: 21189620] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
AIM To observe the effects of HOE642 (Cariporide) on intracellular free calcium in isolated immature rabbit ventricular myocytes induced by anoxia/reoxygenation, and to search the protective mechanism of the Na+/H+ exchange inhibitor on immature rabbit hearts. METHODS The ventricular cardiomyocytes isolated from six New Zealand immature rabbit hearts were divided into three groups of each heart, which were attained by mean of collagenase (type II, 0.28 mg/ml) perfusion. All cells were incubated with calcium fluorescence indicator Fluo-3/AM, and then the intracellular free calcium was measured under the laser scanning confocal microscopy. As well as the creatine phosphokinase (CK) and lactic dehydrogenase (LDH) were measured. The baseline was measured after isolation without anoxia/reoxygenation. The control group received anoxic conditions for 60 minutes and reoxygenation for 30 minutes, then measured. The experiment group received the same conditions as control group with addition of HOE642 (1 micromol/L). RESULTS After anoxia/reoxygenation, the intracellular free calcium of isolated immature rabbit ventricular myocytes and CK, LDH in control group increased significantly than baseline (P < 0.01), there were no significant difference of immature myocardial [Ca+]i and CK, LDH between experiment group and baseline (P > 0.05), and the experiment group myocardial [Ca2+]i and CK, LDH reduced significantly than control (P < 0.01). CONCLUSION HOE642 (Cariporide) may reduce intracellular calcium overload and the enzymes level (CK, LDH) in isolated immature rabbit ventricular myocytes induced by anoxia/reoxygenation, so the protective mechanism of HOE642 on immature rabbit heart may be by inhibition of the intracellular free calcium overload.
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Affiliation(s)
- J A Yang
- Department of Cardiovascular Surgery, PLA General Hospital, Beijing 100853, China
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Yang JA. Fathering and children's sex role orientation in Korea. Adolescence 2001; 35:731-45. [PMID: 11214211] [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
The purpose of this exploratory study was to examine variation in aspects of contemporary Korean fathering, such as warmth and involvement (frequency and task share), and its relationship to children's sex role development. One hundred and twenty-nine Korean families (fathers, mothers, and their 11- to 13-year-old children) completed standardized questionnaires addressing child-rearing practices, parental involvement, spousal support, and sex role orientations. Statistical analyses of the data revealed that warmth of fathering and father involvement (frequency and task share) were not significantly associated with children's sex role orientations. However, girls' femininity was significantly related to fathers' masculinity.
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Affiliation(s)
- J A Yang
- Department of Psychology, Northwest Missouri State University, Maryville 64468, USA.
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Oh H, Lee SE, Yang JA, Chung CY, Ryu SY, Huh MD, Jo SK, Son CH, Kim SH. Establishment of a biological indicator for the radiation and safety of diagnostic ultrasound using apoptosis. In Vivo 2000; 14:345-9. [PMID: 10836208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
We have studied, by a nonisotopic in situ end-labeling (ISEL) technique, the frequency of apoptosis in the intestinal crypt cell of adult mice and in the external granular layer(EGL) of the cerebellum of fetuses by gamma-ray irradiation from 60Co or diagnostic ultrasound exposure. The extent of changes following 200 cGy(1090 cGy/min) was studied at 2, 4, 6, 8, 12, or 24 hours after exposure. The maximal frequency was found 4-8 hours after exposure. The mice that received 18, 36, 54, 108, 198, 396 cGy of gamma-rays or diagnostic ultrasound (7.5 MHz, 4.2 mW, ISPTA = 7.9 mW/cm2, IsppA = 114.3 W/cm2) for 10 or 30 minutes were examined 6 hours after irradiation. Measurements performed after gamma-ray irradiation showed a dose-related increase in apoptotic cells in each of the mice studied. The dose-response curves were analyzed with alpha linear-quadratic model: the frequency (number per crypt) of apoptotic cells in the intestinal crypt of adult mice was y = (0.0386 +/- 0.004204)D + (-0.0000535 +/- 0.00001120)D2 + 0.15475(r2 = 0.952, y = apoptotic cell per crypt cell, D = dose in cGy), and the frequency (percentage of apoptotic cell in the EGL) of apoptotic cell in the EGL of fetus was y = (0.1349 +/- 1.175)D + (-0.001522 +/- 0.334)D2 + 0.0477(r2 = 0.981, y = % of apoptotic cell in the EGL, D = dose in cGy). In the experiment of ultrasound exposure, the frequencies of apoptosis were 0.181 +/- 0.055(10 minutes exposure) and 0.325 +/- 0.294 (30 minutes exposure) in the crypt cells and 0.106 +/- 0.130% (10 minutes exposure) and 0.167 +/- 0.220%(30 minutes exposure) in the EGL. We estimated the relative dose of the yield from the experiment with ultrasound by substituting the yield from ultrasound exposure into the curue from the gamma-irradiation. The relative doses of ultrasound exposure compared with gamma-irradiation were 0.692 cGy(10 minutes exposure) and 1.334 cGy(30 minutes exposure) in the experiment for crypt cells and 0.432 cGy(10 minutes exposure) and 0.885 cGy(30 minutes exposure) in the experiment for EGL. Although there is presently no evidence to indicate that diagnostic ultrasound involves a significant risk, it is not wise to use diagnostic ultrasound indiscriminately.
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Affiliation(s)
- H Oh
- College of Veterinary Medicine, Chonnam National University, Puk-Ku, Kwangju, South Korea
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Lee SE, Oh H, Yang JA, Jo SK, Byun MW, Yee ST, Kim SH. Radioprotective effects of two traditional Chinese medicine prescriptions: si-wu-tang and si-jun-zi-tang. Am J Chin Med 1999; 27:387-96. [PMID: 10592848 DOI: 10.1142/s0192415x99000446] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
We performed this study to determine the effect of Si-Wu-Tang, a basic prescription of traditional Oriental medicine as a blood-building decoction (Chinese medical concept: Bu-Xie), Si-Jun-Zi-Tang, a basic prescription as an energy tonic (Chinese medical concept: Bu-Qi) and its major ingredients on jejunal crypt survival, endogenous spleen colony formation, and apoptosis in jejunal crypt cells of mice irradiated with high and low dose of gamma-irradiation. Si-Wu-Tang administration before irradiation protected the jejunal crypts (p < 0.0005), increased the formation of endogenous spleen colonies (p < 0.05) and reduced the frequency of radiation-induced apoptosis (p < 0.05). In an experiment on the effect of ingredients of Si-Wu-Tang, the result indicated that extract of Danggui and Baishaoyao might have a major radioprotective effect. The radioprotective effect of Si-Jun-Zi-Tang and its ingredients were not as significant as that of Si-Wu-Tang. Although the mechanisms of this inhibitory effect remain to be elucidated, these results indicate that Si-Wu-Tang might be a useful radioprotector, especially since it is a relatively nontoxic natural product. Further studies are needed to characterize better the protective nature of Si-Wu-Tang extract and its ingredients.
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Affiliation(s)
- S E Lee
- Department of Anatomy, College of Veterinary Medicine, Chonnam National University, Kwangju, South Korea
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17
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Yang JA, Choi JH, Rhee SJ. Effects of green tea catechin on phospholipase A2 activity and antithrombus in streptozotocin diabetic rats. J Nutr Sci Vitaminol (Tokyo) 1999; 45:337-46. [PMID: 10524352 DOI: 10.3177/jnsv.45.337] [Citation(s) in RCA: 45] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
The purpose of this study was to investigate the effects of dietary green tea catechin on phospholipase A2 (PLA2) activity and the antithrombotic reaction of platelets in streptozotocin (STZ)-diabetic rats. Sprague-Dawley male rats weighing 100 +/- 10 g were randomly divided into one normal and three STZ-diabetic groups, which were subdivided into catechin-free group (DM-0C), 0.5% catechin group (DM-0.5C) and 1% catechin group (DM-1C). The activity level of platelet phospholipase A2 was higher in the diabetic groups than in the normal group, while it was lower in DM-0.5C and DM-1C than in DM-0C. The activity of platelet cyclooxygenase in DM-0C was 1.1-fold as high as in the normal group, but was significantly reduced by catechin supplementation. The platelet thromboxane A2 (TXA2) formation became higher in DM-0C as compared to the normal group, but not in DM-0.5C and DM-1C. The synthesis of aortic prostacyclin (PGI2) was lower in DM-0C and DM-0.5C than in the normal group. The PGI2/TXA2 ratio was decreased to 55% in DM-0C, but was restored by catechin supplementation. These results indicate that STZ-diabetic rats are sensitive to platelet aggregation and thrombosis, and that the abnormality can be improved by dietary catechin.
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Affiliation(s)
- J A Yang
- Department of Food Science and Nutrition, Catholic University of Taegu-Hyosung, Kyungbuk, Korea
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He GW, Yang CQ, Yang JA. Depolarizing cardiac arrest and endothelium-derived hyperpolarizing factor-mediated hyperpolarization and relaxation in coronary arteries: the effect and mechanism. J Thorac Cardiovasc Surg 1997; 113:932-41. [PMID: 9159628 DOI: 10.1016/s0022-5223(97)70267-8] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.3] [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
OBJECTIVES Depolarizing (hyperkalemic) solutions are widely used to preserve organs for transplantation and for cardiac operations. We previously observed that exposure to hyperkalemia reduced endothelium-dependent, noncyclooxygenase- and non-nitric oxide-mediated relaxation. This study was designed to examine the mechanism of this effect with regard to K channels and the associated membrane potential changes. METHODS Porcine coronary artery rings were studied in organ chambers. After incubation of the tissue with 20 or 50 mmol/L doses of potassium for 1 hour, the endothelium-derived hyperpolarizing factor-mediated relaxation in the artery and the membrane hyperpolarization in a single coronary smooth muscle cell were studied. RESULTS The endothelium-derived hyperpolarizing factor-mediated relaxation induced by substance P, which could be significantly inhibited by the Ca(2+)-activated K channel blocker tetraethylammonium but only to a lesser extent by the adenosine triphosphate-sensitive K channel blocker glibenclamide, was significantly reduced. Substance P-induced hyperpolarization of the membrane potential was also significantly reduced by the hyperkalemic incubation with a significantly elevated resting membrane potential. CONCLUSIONS Depolarizing arrest reduces endothelium-derived hyperpolarizing factor-mediated membrane hyperpolarization and relaxation by affecting mainly the Ca(2+)-activated K channels and by depolarizing the membrane for a prolonged period. We suggest that this is one of the mechanisms for coronary dysfunction after exposure to depolarizing (hyperkalemic) cardioplegic and organ-preservation solutions and that, therefore, "perfect" protection of the heart or other organs should restore the endothelium-derived hyperpolarizing factor-related endothelial function.
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Affiliation(s)
- G W He
- Department of Surgery, University of Hong Kong, Grantham Hospital, Hong Kong
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19
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Abstract
BACKGROUND The impairment of the synthesis and release of endothelium-derived relaxing factors may be related to the high incidence of atherosclerosis and occlusion in saphenous vein grafts. This study focused on the effect of surgical preparation on one of the endothelium-derived relaxing factors, endothelium-derived hyperpolarizing factor, in the human saphenous vein. METHODS Human saphenous vein segments taken from patients undergoing coronary bypass were placed in an organ bath. A glass microelectrode was inserted into a smooth muscle cell. The membrane potential in response to acetylcholine (-9 to -5 log M) was measured in normal or surgically prepared saphenous vein with presence or absence of NG-nitro-L-arginine (300 mumol/L) and indomethacin (7 mumol/L). RESULTS The resting membrane potential was -71.28 +/- 1.91 mV (n = 7) with intact endothelium and -65.5 +/- 2.92 mV (n = 6, p > 0.05) without endothelium. Acetylcholine hyperpolarized membrane potential with intact endothelium (-90.57 +/- 1.48 mV, n = 7, p < 0.001), but not without endothelium (-69.67 +/- 2.93 mV, n = 6, p > 0.05). In the surgically prepared saphenous vein, acetylcholine did not hyperpolarize membrane potential (-71.83 +/- 3.84 mV versus the resting membrane potential of -69.50 +/- 3.53 mV, n = 6, p > 0.05). CONCLUSIONS The endothelium-derived hyperpolarizing factor plays a role in the human saphenous vein. The surgical preparation abolishes the endothelium-derived hyperpolarizing factor-mediated hyperpolarization in the saphenous vein. This study provides evidence of functional changes of endothelium by traditional surgical preparation from another point of view, and it may be related to the high incidence of occlusion in saphenous vein grafts.
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Affiliation(s)
- J A Yang
- Department of Surgery, University of Hong Kong, Grantham Hospital, Aberdeen, Hong Kong
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20
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Abstract
Hyperkalemic solutions are widely used to preserve organs for transplantation and for cardiac surgery. The present study was designed to test the hypothesis that hyperkalemia may alter endothelial function through a non-nitric oxide (NO) pathway, since preliminary studies have shown that the NO pathway may not be affected. Porcine coronary artery rings were studied in organ chambers. After incubation with 20 or 50 mM K+ for 1 h, the indomethacin- and NG-nitro-L-arginine+ (L-NNA)-resistant relaxation induced by A23187 or bradykinin, which could be further inhibited by tetraethylammonium but not glibenclamide, was significantly reduced. Incubation with hyperkalemia also significantly increased the concentration eliciting 50% of the maximal response to A23187 and bradykinin. A23187-induced hyperpolarization of the membrane potential was significantly reduced by hyperkalemic incubation. However, 1-h incubation with hyperkalemia does not affect the endothelial Ca2+ concentration. We conclude that exposure to hyperkalemia reduces the indomethacin- and L-NNA-resistant endothelium-dependent relaxation and endothelium-dependent hyperpolarization. This reduction in the relaxation and hyperpolarization is related to the endothelium-derived hyperpolarizing factor by affecting its effect on the smooth muscle cell, probably through partially depolarizing the membrane, and the Ca2(+)- activated K+ channels rather than by affecting its biosynthesis and/or release in the endothelial cell. Our study may suggest a new mechanism for coronary dysfunction after exposure to hyperkalemic cardioplegia and organ preservation solutions.
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Affiliation(s)
- G W He
- Grantham Hospital, Department of Surgery, University of Hong Kong, Hong Kong.
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21
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Abstract
An autobiographical memory task was used to study memory processes and depression in elderly individuals. Twenty-seven nondepressed and twenty-seven depressed elderly participants recalled thirty memories. Each memory was self-rated for happiness versus sadness and the degree of importance of the event at the time the event occurred (i.e., "then") and looking back on the event ("now"). Nondepressed participants perceived greater positive change in affective tone between "then" and "now" ratings. Depressed participants recalled more memories rated as sad "now" than nondepressed, and perceived negative and positive memories to become more neutral than nondepressed participants. These results are consistent with a mood congruence hypothesis, in that participants recalled more memories affectively consistent with current mood, and a self-enhancement view of reminiscing, such that recalling memories evaluated as happier was associated with less depression.
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Affiliation(s)
- J A Yang
- Neuropsychiatric Institute, University of California, Los Angeles
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22
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Abstract
A comparison of alpha-, beta-, and gamma-cyclodextrins in the solid state is made. Monomeric features analyzed include orientations of primary hydroxyl groups and pyran ring pucker. Macromolecular features examined include planarity of the oligomer, tilting of pyran rings, and, deviation from Cn symmetry where n = number of monomers. The mean values and standard deviations of these shape descriptors are given for cyclodextrins with and without guests embedded in their interiors. Molecular mechanics calculations using the MM2, AMBER, and CHARMM force fields show that most solid state cyclodextrins are trapped in high-energy conformations relative to the most stable forms found in this study.
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Affiliation(s)
- K B Lipkowitz
- Department of Chemistry, Indiana University-Purdue University at Indianapolis 46205
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Abstract
Perceived contrast was measured under natural viewing conditions with the use of contrast-matching and magnitude-estimation paradigms and found to be independent of luminance over a range of luminances from 37.5 down to 8 cd/m2. However, this contrast constancy broke down when the dimmer target was below 8 cd/m2. The perceived contrast of the dimmer target then fell below that expected from contrast constancy. The extended range of contrast constancy previously reported [J. Physiol. 252, 627 (1975); Vision Res. 16, 1419 (1976)] has been thought to imply neural mechanisms with unlimited constancy, but these researchers permitted differential adaptation to the brighter and dimmer targets, which were seen haploscopically (by different eyes). As our natural-viewing procedure ensured that both bright and dim targets were presented to retinal areas in a roughly constant state of adaptation, our failure to find extended contrast constancy implies an important limitation on the neural processing of contrast.
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Affiliation(s)
- E Peli
- Physiological Optics Unit, Eye Research Institute, Boston, Massachusetts 02114
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24
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Rothenberg EV, Diamond RA, Pepper KA, Yang JA. IL-2 gene inducibility in T cells before T cell receptor expression. Changes in signaling pathways and gene expression requirements during intrathymic maturation. The Journal of Immunology 1990. [DOI: 10.4049/jimmunol.144.5.1614] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Abstract
The ability to express the growth hormone IL-2 upon stimulation gives T lymphocytes one of their major effector functions in the immune system. IL-2 is apparently synthesized only by T cells, and only by a subset of T cells which constitutes a "helper" class. It remains unknown how and when the IL-2-producing lineage becomes distinct from other functional effector lineages. We have therefore examined immature T cell precursors to determine when IL-2 inducibility is acquired in relation to other maturation events, such as expression of an Ag-binding TCR, which is suspected to play an influential role in the determination of subclass commitment. In mature T cells, IL-2 is inducible via agonists of the phosphoinositide pathway, a network of signaling mediators shared by a wide variety of metazoan cell types. The universality of this activation pathway makes it seem less likely, a priori, to be a target of developmental change than the intrinsic susceptibility to induction of the IL-2 locus. However, our results presented here refute this expectation. In this report, we show that both TCR+ cells and pre-T cells too immature to express TCR can be induced to express IL-2 at high levels. The induction requirements for IL-2 expression, however, are different in TCR- and TCR+ cells. Even by using Ca2+ ionophore and phorbol ester to bypass the requirement for the TCR in cell activation, the TCR- cells also require the presence of the polypeptide hormone IL-1. By contrast, TCR+ mature cells not only can express IL-2 without IL-1, but also show no response to IL-1 when Ca2+ ionophore and phorbol ester are present. IL-1-dependent IL-2 producers appear in the thymus of repopulating radiation chimeras before "mature" (TCR+) T cells, whereas IL-1-independent IL-2 production is found only afterward. Thus, IL-2 inducibility per se apparently precedes TCR expression and all TCR-associated fate determination events. However, developmental alteration of signal transduction pathways may play a vital regulatory role in the later allocation of particular functional responses to appropriate lineages of T cells.
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Affiliation(s)
- E V Rothenberg
- Division of Biology, California Institute of Technology, Pasadena 91125
| | - R A Diamond
- Division of Biology, California Institute of Technology, Pasadena 91125
| | - K A Pepper
- Division of Biology, California Institute of Technology, Pasadena 91125
| | - J A Yang
- Division of Biology, California Institute of Technology, Pasadena 91125
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25
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Rothenberg EV, Diamond RA, Pepper KA, Yang JA. IL-2 gene inducibility in T cells before T cell receptor expression. Changes in signaling pathways and gene expression requirements during intrathymic maturation. J Immunol 1990; 144:1614-24. [PMID: 2106551] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The ability to express the growth hormone IL-2 upon stimulation gives T lymphocytes one of their major effector functions in the immune system. IL-2 is apparently synthesized only by T cells, and only by a subset of T cells which constitutes a "helper" class. It remains unknown how and when the IL-2-producing lineage becomes distinct from other functional effector lineages. We have therefore examined immature T cell precursors to determine when IL-2 inducibility is acquired in relation to other maturation events, such as expression of an Ag-binding TCR, which is suspected to play an influential role in the determination of subclass commitment. In mature T cells, IL-2 is inducible via agonists of the phosphoinositide pathway, a network of signaling mediators shared by a wide variety of metazoan cell types. The universality of this activation pathway makes it seem less likely, a priori, to be a target of developmental change than the intrinsic susceptibility to induction of the IL-2 locus. However, our results presented here refute this expectation. In this report, we show that both TCR+ cells and pre-T cells too immature to express TCR can be induced to express IL-2 at high levels. The induction requirements for IL-2 expression, however, are different in TCR- and TCR+ cells. Even by using Ca2+ ionophore and phorbol ester to bypass the requirement for the TCR in cell activation, the TCR- cells also require the presence of the polypeptide hormone IL-1. By contrast, TCR+ mature cells not only can express IL-2 without IL-1, but also show no response to IL-1 when Ca2+ ionophore and phorbol ester are present. IL-1-dependent IL-2 producers appear in the thymus of repopulating radiation chimeras before "mature" (TCR+) T cells, whereas IL-1-independent IL-2 production is found only afterward. Thus, IL-2 inducibility per se apparently precedes TCR expression and all TCR-associated fate determination events. However, developmental alteration of signal transduction pathways may play a vital regulatory role in the later allocation of particular functional responses to appropriate lineages of T cells.
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Affiliation(s)
- E V Rothenberg
- Division of Biology, California Institute of Technology, Pasadena 91125
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26
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McGuire KL, Yang JA, Rothenberg EV. Influence of activating stimulus on functional phenotype: interleukin 2 mRNA accumulation differentially induced by ionophore and receptor ligands in subsets of murine T cells. Proc Natl Acad Sci U S A 1988; 85:6503-7. [PMID: 3137569 PMCID: PMC282001 DOI: 10.1073/pnas.85.17.6503] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.8] [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: 01/04/2023] Open
Abstract
We have investigated the linkage between CD4/CD8 phenotype and programming for specific responses in primary T-cell populations. In situ hybridization has been used to determine the frequency of cells competent to express the interleukin 2 (IL-2) gene after short-term stimulation with various polyclonal activators. The effects of the T-cell receptor ligands Con A and anti-CD3 monoclonal antibody were compared with those of a calcium ionophore that bypasses membrane receptors altogether. Induction with a calcium ionophore and phorbol ester revealed that potential IL-2 producers not only constitute greater than 85% of the cells with a CD4+ "helper/inducer" phenotype but also constitute over half of the cells with a CD8+ "killer/suppressor" phenotype. There is no defect in the ability of these CD8+ cells to accumulate IL-2 transcripts under these conditions. By contrast, in response to phorbol ester and either Con A or anti-CD3, the CD8+ cells show an abortive IL-2 production response with rapid disappearance of IL-2 mRNA. This results in substantially lower yields of IL-2 per cell than is made by CD4+ cells in response to the same stimuli. The extent to which these populations appear to have diverged in function thus depends on the stimulus used to trigger the response. The results suggest that differences in signal transduction or posttranscriptional regulatory mechanisms, rather than effector gene inducibility per se, may initially underlie the commitment of CD4+ and CD8+ cells to distinct functional roles.
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Affiliation(s)
- K L McGuire
- Division of Biology, California Institute of Technology, Pasadena 91125
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Abstract
A major glutamine tRNA from rat liver was purified. Post-labeling techniques showed its nucleotide sequence to be: pG-G-U-U-C-C-A-U-m(1)G-G-U-G-psi-A-A-D-Gm-G-D-D-A-G-C-A-C-U-C-U-G-G-A-Cm-U-C-U-G-A-A-psi-C-C-A-G-C-G-A-U-m(5)C-m(5)C-G-A-G-psi-psi-C-A-m(1)A-A-U-C-U-C-G-G-U-G-G-A-A-C-C-U-C-C-A(OH).Images
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Abstract
A glutamate tRNA from rat liver was purified. By means of post-labeling techniques, its nucleotide sequence was shown to be: pU-C-C-C-A-C-A-U-m1G-G-U-C-psi-A-G-C- G-G-D-D-A-G-G-A-U-U-C-C-U-G-G-psi-U-mcm5s2U-U-C-A-C-C-C-A-G-G-C-G- G-C-m5C-m5C-G-G-G-Tm-psi-C-G-A-C-U-C-C-C-G-G-U-G-U-G-G-G-A-A-C-C-AOH. The sequence is remarkably similar to that of tRNA4Glu from Drosophila melanogaster. Only 10 out of 75 nucleotides in the two tRNAs are different.
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Abstract
A glutamate tRNA from rat liver was purified. By means of post-labeling techniques, its nucleotide sequence was shown to be: pU-C-C-C-A-C-A-U-m1G-G-U-C-psi-A-G-C- G-G-D-D-A-G-G-A-U-U-C-C-U-G-G-psi-U-mcm5S2U-U-C-A-C-C-C-A-G-G-C-G- G-C-m5C-m5C-G-G-G-Tm-psi-C-G-A-C-U-C-C-C-G-G-U-G-U-G-G-G-A-A-C-C-AOH. The sequence is remarkably similar to that of tRNAGlu from Drosophila melanogaster. Only 10 out of 75 nucleotides in the two tRNAs are different.
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Yang JA, Huber SA, Lucas ZJ. Inhibition of DNA synthesis in cultured lymphocytes and tumor cells by extracts of betel nut, tobacco, and miang leaf, plant substances associated with cancer of the ororespiratory epithelium. Cancer Res 1979; 39:4802-9. [PMID: 498109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The high incidence of oropharyngeal, esophageal, and laryngeal cancers in certain parts of the world has been ascribed to conjugated tannins found in certain folk medicinal herbs. We extracted miang leaf and betel nut with phosphate-buffered saline (0.14 M NaCl, 0.15 M potassium phosphate buffer, pH 7.4) and found that the extracts inhibited [3H]thymidine incorporation by phytohemagglutinin-stimulated human lymphocytes and by rat mammary tumor and mouse L-cells in logarithmic growth. Pretreating the lymphocytes for 1 or 4 hr with the extracts inhibited phytohemagglutinin-induced thymidine incorporation 72 hr later. At concentrations of 2.5 volumes % or lower, miang and betel nut extracts inhibited thymidine incorporation by 40 to 98% without any apparent signs of toxicity as demonstrated by the 66Rb equilibrium assay. In addition, neither extract inhibited cytotoxicity of rat mammary tumor cells by immune syngeneic spleen cells. The molecular weights of the inhibitory factors were between 1,000 and 10,000 daltons as determined by ultrafiltration and were unaffected by boiling for 3 min or by treatment with alcohol and, therefore, are probably not proteins. This in vitro demonstration of inhibition of DNA synthesis by these plant extracts presumably enriched for conjugated tannins may relate to inhibition of growth of rats and chicks fed conjugated tanin-contaminated sorghum feed. The carcinogenic potential of either these extracts or conjugated tannins is not yet established.
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