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Liu ZY, Liu F, Cao Y, Peng SL, Pan HW, Hong XQ, Zheng PF. ACSL1, CH25H, GPCPD1, and PLA2G12A as the potential lipid-related diagnostic biomarkers of acute myocardial infarction. Aging (Albany NY) 2023; 15:1394-1411. [PMID: 36863716 PMCID: PMC10042701 DOI: 10.18632/aging.204542] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Accepted: 02/13/2023] [Indexed: 03/04/2023]
Abstract
Lipid metabolism plays an essential role in the genesis and progress of acute myocardial infarction (AMI). Herein, we identified and verified latent lipid-related genes involved in AMI by bioinformatic analysis. Lipid-related differentially expressed genes (DEGs) involved in AMI were identified using the GSE66360 dataset from the Gene Expression Omnibus (GEO) database and R software packages. Gene ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway enrichment analyses were conducted to analyze lipid-related DEGs. Lipid-related genes were identified by two machine learning techniques: least absolute shrinkage and selection operator (LASSO) regression and support vector machine recursive feature elimination (SVM-RFE). The receiver operating characteristic (ROC) curves were used to descript diagnostic accuracy. Furthermore, blood samples were collected from AMI patients and healthy individuals, and real-time quantitative polymerase chain reaction (RT-qPCR) was used to determine the RNA levels of four lipid-related DEGs. Fifty lipid-related DEGs were identified, 28 upregulated and 22 downregulated. Several enrichment terms related to lipid metabolism were found by GO and KEGG enrichment analyses. After LASSO and SVM-RFE screening, four genes (ACSL1, CH25H, GPCPD1, and PLA2G12A) were identified as potential diagnostic biomarkers for AMI. Moreover, the RT-qPCR analysis indicated that the expression levels of four DEGs in AMI patients and healthy individuals were consistent with bioinformatics analysis results. The validation of clinical samples suggested that 4 lipid-related DEGs are expected to be diagnostic markers for AMI and provide new targets for lipid therapy of AMI.
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Affiliation(s)
- Zheng-Yu Liu
- Department of Cardiology, Hunan Provincial People's Hospital, Changsha 410000, China
- Department of Epidemiology, Hunan Provincial People's Hospital (The First Affiliated Hospital of Hunan Normal University), Changsha 410000, China
- Clinical Medicine Research Center of Heart Failure of Hunan Province, Changsha 410000, China
| | - Fen Liu
- Department of Epidemiology, Hunan Provincial People's Hospital (The First Affiliated Hospital of Hunan Normal University), Changsha 410000, China
- Clinical Medicine Research Center of Heart Failure of Hunan Province, Changsha 410000, China
- The First Affiliated Hospital of Hunan Normal University (Hunan Provincial People's Hospital), Changsha 410000, China
| | - Yan Cao
- Department of Epidemiology, Hunan Provincial People's Hospital (The First Affiliated Hospital of Hunan Normal University), Changsha 410000, China
- Clinical Medicine Research Center of Heart Failure of Hunan Province, Changsha 410000, China
- Department of Emergency, Hunan Provincial People's Hospital, Changsha 410000, China
| | - Shao-Liang Peng
- Department of Epidemiology, Hunan Provincial People's Hospital (The First Affiliated Hospital of Hunan Normal University), Changsha 410000, China
- Clinical Data Center, Hunan Provincial People's Hospital, Changsha 410000, China
| | - Hong-Wei Pan
- Department of Cardiology, Hunan Provincial People's Hospital, Changsha 410000, China
- Department of Epidemiology, Hunan Provincial People's Hospital (The First Affiliated Hospital of Hunan Normal University), Changsha 410000, China
- Clinical Medicine Research Center of Heart Failure of Hunan Province, Changsha 410000, China
| | - Xiu-Qin Hong
- Department of Epidemiology, Hunan Provincial People's Hospital (The First Affiliated Hospital of Hunan Normal University), Changsha 410000, China
- Clinical Medicine Research Center of Heart Failure of Hunan Province, Changsha 410000, China
- The First Affiliated Hospital of Hunan Normal University (Hunan Provincial People's Hospital), Changsha 410000, China
| | - Peng-Fei Zheng
- Department of Cardiology, Hunan Provincial People's Hospital, Changsha 410000, China
- Department of Epidemiology, Hunan Provincial People's Hospital (The First Affiliated Hospital of Hunan Normal University), Changsha 410000, China
- Clinical Medicine Research Center of Heart Failure of Hunan Province, Changsha 410000, China
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Ji BY, Pan LR, Zhou JR, You ZH, Peng SL. SMMDA: Predicting miRNA-Disease Associations by Incorporating Multiple Similarity Profiles and a Novel Disease Representation. Biology 2022; 11:biology11050777. [PMID: 35625505 PMCID: PMC9138858 DOI: 10.3390/biology11050777] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Revised: 05/17/2022] [Accepted: 05/17/2022] [Indexed: 12/24/2022]
Abstract
Simple Summary Predicting possible associations between miRNAs and diseases would provide new perspectives on disease diagnosis, pathogenesis, and gene therapy. In this work, considering the limited accessibility, high time consumption and high cost in traditional biological researches, we presented a novel computational method called SMMDA by incorporating multiple similarity profiles and a novel disease rep-resentation to accelerate the identification of potential miRNA-disease associations. SMMDA was intended to be useful for the prediction of associations between miRNAs and diseases, and to be effective for prevention, diagnosis, treatment and prognosis of Human diseases. Abstract Increasing evidence has suggested that microRNAs (miRNAs) are significant in research on human diseases. Predicting possible associations between miRNAs and diseases would provide new perspectives on disease diagnosis, pathogenesis, and gene therapy. However, considering the intrinsic time-consuming and expensive cost of traditional Vitro studies, there is an urgent need for a computational approach that would allow researchers to identify potential associations between miRNAs and diseases for further research. In this paper, we presented a novel computational method called SMMDA to predict potential miRNA-disease associations. In particular, SMMDA first utilized a new disease representation method (MeSHHeading2vec) based on the network embedding algorithm and then fused it with Gaussian interaction profile kernel similarity information of miRNAs and diseases, disease semantic similarity, and miRNA functional similarity. Secondly, SMMDA utilized a deep auto-coder network to transform the original features further to achieve a better feature representation. Finally, the ensemble learning model, XGBoost, was used as the underlying training and prediction method for SMMDA. In the results, SMMDA acquired a mean accuracy of 86.68% with a standard deviation of 0.42% and a mean AUC of 94.07% with a standard deviation of 0.23%, outperforming many previous works. Moreover, we also compared the predictive ability of SMMDA with different classifiers and different feature descriptors. In the case studies of three common Human diseases, the top 50 candidate miRNAs have 47 (esophageal neoplasms), 48 (breast neoplasms), and 48 (colon neoplasms) are successfully verified by two other databases. The experimental results proved that SMMDA has a reliable prediction ability in predicting potential miRNA-disease associations. Therefore, it is anticipated that SMMDA could be an effective tool for biomedical researchers.
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Affiliation(s)
- Bo-Ya Ji
- College of Computer Science and Electronic Engineering, Hunan University, Changsha 410200, China; (B.-Y.J.); (L.-R.P.)
| | - Liang-Rui Pan
- College of Computer Science and Electronic Engineering, Hunan University, Changsha 410200, China; (B.-Y.J.); (L.-R.P.)
| | - Ji-Ren Zhou
- College of Computer Science, Northwestern Polytechnic University, Xi’an 710072, China;
| | - Zhu-Hong You
- College of Computer Science, Northwestern Polytechnic University, Xi’an 710072, China;
- Correspondence: (Z.-H.Y.); (S.-L.P.)
| | - Shao-Liang Peng
- College of Computer Science and Electronic Engineering, Hunan University, Changsha 410200, China; (B.-Y.J.); (L.-R.P.)
- Correspondence: (Z.-H.Y.); (S.-L.P.)
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Dillon SR, Evans LS, Rickel E, Lewis KE, Swanson R, Levin SD, Wolfson M, Peng SL, Swiderek KM. Abstract P1-20-03: Withdrawn. Cancer Res 2019. [DOI: 10.1158/1538-7445.sabcs18-p1-20-03] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
This abstract was withdrawn by the authors.
Citation Format: Dillon SR, Evans LS, Rickel E, Lewis KE, Swanson R, Levin SD, Wolfson M, Peng SL, Swiderek KM. Withdrawn [abstract]. In: Proceedings of the 2018 San Antonio Breast Cancer Symposium; 2018 Dec 4-8; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2019;79(4 Suppl):Abstract nr P1-20-03.
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Affiliation(s)
| | - LS Evans
- Alpine Immune Sciences, Seattle, WA
| | - E Rickel
- Alpine Immune Sciences, Seattle, WA
| | - KE Lewis
- Alpine Immune Sciences, Seattle, WA
| | | | - SD Levin
- Alpine Immune Sciences, Seattle, WA
| | | | - SL Peng
- Alpine Immune Sciences, Seattle, WA
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Rickel E, Evans L, Swanson R, Levin SS, Rixon M, Wolfson M, Bhandari J, MacNeil S, Hoover J, Kornacker M, Capuano I, Peng SL. Abstract P1-09-10: ICOSL anti-HER2 V-mAbs: Localizing engineered ICOSL costimulatory agonists to HER2+ tumors through trastuzumab. Cancer Res 2018. [DOI: 10.1158/1538-7445.sabcs17-p1-09-10] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: The presence of tumor infiltrating lymphocytes (TILs) has been associated with improved prognosis in HER2+ breast cancer patients. Antigen specific TCR and costimulatory receptor signaling drive increases in TIL number, effector function, and tumor cytotoxicity. Improving the number and effector phenotype of tumor localized TILs has curative potential by enhancing the adaptive and memory immune response. Targeting HER2 with the monoclonal anti-HER2 antibody trastuzumabhas improved survival in HER2+ breast cancer patients and is known to increase peripheral type I immunity, which may be reflected by increased TILs.
The Immunoglobulin Superfamily (IgSF) includes a large, diverse family of immunotherapy targets expressed on immune cells and tumors. Transmembrane IgSF receptors,CD28 and inducible T cell co-stimulator (ICOS), related costimulatory molecules expressed on T cells, interact with CD80/CD86 and ICOS ligand (ICOSL), respectively, and play critical roles in T cell activation and adaptive immunity.The Alpine Immune Science's VIgDTM platform uses directed evolution to derive novel, therapeutically-applicable IgSF extracellular domains with tailored specificity and affinity. The vIgD platform has generated human ICOSL vIgDs capable of binding both ICOS and CD28, activating both pathways. To promote anti-tumor activity of TILs in HER2+ tumors, we developed trastuzumab-ICOSL “V-mAbs” consisting of trastuzumab fused to activating ICOSL vIgDs. These V-mAbs are designed to localize to HER2+ tumors and activate antigen-specific, resident T-cells through costimulatory receptor agonism.
Methods: V-mAbs were generated by fusing ICOSL vIgDs to either the N- or C- termini of the heavy and/or light chains of trastuzumab. V-mAb binding to CD28, ICOS or HER2 was measured by flow cytometric analysis of transfected cells or ForteBio analysis. V-mAb costimulatory activity was confirmed by immobilization in the presence of anti-CD3 in a primary human T cell assay. Finally, V-mAbs were co-cultured with HER2+ target cells and human T cells; T-cell activity was measured by proliferation, cytokine production, and target lysis.
Results: V-mAbs were successfully produced and bound to CD28, ICOS and HER2. In a plate bound costimulation assay, the V-mAbs increased the amount of IFN-gamma produced by T-cells stimulated with anti-CD3. When incubated with HER2+ target cells, V-mAbs promoted T-cell proliferation, cytokine secretion, and target cell lysis. Data from in vivo studies, to determine the impact of trastuzumab V-mAbs on HER2+ cancers, will be presented when available.
Conclusions: Trastuzumab-ICOSL V-mAbs are novel ICOS- and CD28-activating immunotherapies for HER2-positive tumors, promoting T-cell proliferation, cytokine secretion, and target cell lysis in a HER2 dependent fashion. The V-mAb platform has broad potential to enable tumor-localized immune modulation via the diverse array of IgSF members. Preclinical development of trastuzumab-ICOSL clinical therapeutics is in progress.
Citation Format: Rickel E, Evans L, Swanson R, Levin SS, Rixon M, Wolfson M, Bhandari J, MacNeil S, Hoover J, Kornacker M, Capuano I, Peng SL. ICOSL anti-HER2 V-mAbs: Localizing engineered ICOSL costimulatory agonists to HER2+ tumors through trastuzumab [abstract]. In: Proceedings of the 2017 San Antonio Breast Cancer Symposium; 2017 Dec 5-9; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2018;78(4 Suppl):Abstract nr P1-09-10.
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Affiliation(s)
- E Rickel
- Alpine Immune Sciences, Seattle, WA
| | - L Evans
- Alpine Immune Sciences, Seattle, WA
| | | | - SS Levin
- Alpine Immune Sciences, Seattle, WA
| | - M Rixon
- Alpine Immune Sciences, Seattle, WA
| | | | | | | | - J Hoover
- Alpine Immune Sciences, Seattle, WA
| | | | | | - SL Peng
- Alpine Immune Sciences, Seattle, WA
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Li B, Wang JY, Liu JQ, Shi ZX, Peng SL, Huang HJ, Qin TJ, Xu ZF, Zhang Y, Fang LW, Zhang HL, Hu NB, Pan LJ, Qu SQ, Xiao ZJ. [Gene mutations from 511 myelodysplastic syndromes patients performed by targeted gene sequencing]. Zhonghua Xue Ye Xue Za Zhi 2017; 38:1012-1016. [PMID: 29365392 PMCID: PMC7342197 DOI: 10.3760/cma.j.issn.0253-2727.2017.12.002] [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] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/15/2017] [Indexed: 12/20/2022]
Abstract
Objective: To study the characteristics of gene mutations in Chinese myelodysplastic syndromes (MDS) patients. Methods: A total of 511 Chinese patients with MDS performed 112-gene targeted sequencing were retrospectively analyzed. Results: Eighty-three distinct mutant genes were found in 511 patients with MDS. Amongst these, the most frequent mutations was associated with epigenetics (50%) , followed by spliceosome (37%) , signal transduction (34%) , transcription factors (24%) and cell cycle/apoptosis (17%) . 439 subjects (86%) had at least one gene mutation. The mean number of mutations in refractory anemia with unilineage dysplasia (RCUD) was 1.25, refractory anemia with multilineage dysplasia (RCMD) was 1.73, refractory anemia with ring sideroblasts (RARS) was 2.79, refractory anemia with excess blasts-1 (RAEB-1) was 2.22, RAEB-2 was 2.34, MDS with isolated 5q- was 2.67, MDS, unclassified (MDS-U) was 2.00. U2AF1 mutant subjects were more likely to have isolated+8[Q<0.001, OR=4.42 (95% CI 2.23-8.68) ]and less likely to have complex karyotypes[Q=0.005, OR=0.22 (95% CI 0.04-0.72) ]. According to the number of gene mutations, all subjects were categorized into three groups, namely group with 0-1 mutation, with 2 mutations and with three or more mutations. There was a significant difference in overall survival (OS) among three groups (P=0.041) . Conclusion: About 90% patients with MDS have at least one gene mutation. Genes associated with epigenetics and spliceosome are most common mutated genes in MDS. The increased numbers of gene mutations accompany with disease evolution and associate with poor prognosis.
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Affiliation(s)
- B Li
- Institute of Hematology and Blood Diseases Hospital, CAMS & PUMC, The State Key Laboratory of Experimental Hematology, Tianjin 300020, China
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Wu C, Schwartz JM, Brabant G, Peng SL, Nenadic G. Constructing a molecular interaction network for thyroid cancer via large-scale text mining of gene and pathway events. BMC Syst Biol 2015; 9 Suppl 6:S5. [PMID: 26679379 PMCID: PMC4674859 DOI: 10.1186/1752-0509-9-s6-s5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Background Biomedical studies need assistance from automated tools and easily accessible data to address the problem of the rapidly accumulating literature. Text-mining tools and curated databases have been developed to address such needs and they can be applied to improve the understanding of molecular pathogenesis of complex diseases like thyroid cancer. Results We have developed a system, PWTEES, which extracts pathway interactions from the literature utilizing an existing event extraction tool (TEES) and pathway named entity recognition (PathNER). We then applied the system on a thyroid cancer corpus and systematically extracted molecular interactions involving either genes or pathways. With the extracted information, we constructed a molecular interaction network taking genes and pathways as nodes. Using curated pathway information and network topological analyses, we highlight key genes and pathways involved in thyroid carcinogenesis. Conclusions Mining events involving genes and pathways from the literature and integrating curated pathway knowledge can help improve the understanding of molecular interactions of complex diseases. The system developed for this study can be applied in studies other than thyroid cancer. The source code is freely available online at https://github.com/chengkun-wu/PWTEES.
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Murabito E, Colombo R, Wu C, Verma M, Rehman S, Snoep J, Peng SL, Guan N, Liao X, Westerhoff HV. SupraBiology 2014: Promoting UK-China collaboration on Systems Biology and High Performance Computing. Quant Biol 2015. [DOI: 10.1007/s40484-015-0039-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Abbah SA, Lu WW, Peng SL, Aladin DMK, Li ZY, Tam WK, Cheung KMC, Luk KDK, Zhou GQ. Extracellular matrix stability of primary mammalian chondrocytes and intervertebral disc cells cultured in alginate-based microbead hydrogels. Cell Transplant 2009; 17:1181-92. [PMID: 19181212 DOI: 10.3727/096368908787236648] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Three-dimensional alginate constructs are widely used as carrier systems for transplantable cells. In the present study, we evaluated the chondrogenic matrix stability of primary rat chondrocytes and intervertebral disc (IVD) cells cultured in three different alginate-based microbead matrices to determine the influence of microenvironment on the cellular and metabolic behaviors of chondrogenic cells confined in alginate microbeads. Cells entrapped in calcium, strontium, or barium ion gelled microbeads were monitored with the live/dead dual fluorescent cell viability assay kit and the 1,9-dimethylmethylene blue (DMB) assay designed to evaluate sulfated glycosaminoglycan (s-GAG) production. Expression of chondrogenic extracellular matrix (ECM) synthesis was further evaluated by semiquantitative RT-PCR of sox9, type II collagen, and aggrecan mRNAs. Results indicate that Ca and Sr alginate maintained significantly higher population of living cells compared to Ba alginate (p < 0.05). Production of s-GAG was similarly higher in Ca and Sr alginate microbead cultures compared to Ba alginate microbeads. Although there was no significant difference between strontium and calcium up to day 14 of culture, Sr alginate showed remarkably improved cellular and metabolic activities on long-term cultures, with chondrocytes expressing as much as 31% and 44% greater s-GAG compared to calcium and barium constructs, respectively, while IVD cells expressed 63% and 74% greater s-GAG compared to calcium and barium constructs, respectively, on day 28. These findings indicate that Sr alginate represent a significant improvement over Ca- and Ba alginate microbeads for the maintenance of chondrogenic phenotype of primary chondrocytes and IVD cells.
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Affiliation(s)
- S A Abbah
- Department of Orthopaedics and Traumatology, The University of Hong Kong, Hong Kong SAR, China
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Gubbels Bupp MR, Li M, Pashine A, Aud D, Peng SL. The candidate lupus susceptibility gene Ifi202a is largely dispensable for B-cell function. Rheumatology (Oxford) 2007; 47:103-4. [PMID: 18037609 DOI: 10.1093/rheumatology/kem259] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Abstract
Abnormal proliferation and/or persistence of synoviocytes and inflammatory cells has long been described in inflammatory arthritis conditions, but only relatively recently has substantial attention been drawn to the relevance of abnormal apoptotic processes in disease pathogenesis and treatment. This review summarizes a current understanding of the Fas (CD95)-Fas ligand (CD178) apoptotic system, which has most predominantly been examined in rheumatoid arthritis. There, synovial inflammation is often characterized by a unique resistance to Fas-related apoptosis, and agonistic therapeutic interventions upon Fas have consistently been found beneficial in both animal and human disease models. Therefore, modulation of the Fas pathway will hopefully be of both pathogenic and therapeutic interest in the study of inflammatory arthritis conditions in general.
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Affiliation(s)
- S L Peng
- Inflammation, Autoimmunity and Transplantation Research, Roche Palo Alto, CA 94025, USA.
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Abstract
The forkhead (Fox) gene family comprises a diverse group of "winged-helix" transcription factors that play important roles in development, metabolism, cancer and aging. Recently, several forkhead genes have been demonstrated to play critical roles in lymphocyte development and effector function, including Foxp3 in the development of regulatory T cells, Foxj1 and Foxo3a in the regulation of CD4+ T cell tolerance, and Foxn1 in thymic development. Roles for other forkhead genes have also been proposed, including Foxp1 in macrophage differentiation, Foxq1 in natural killer cell effector function and Foxd2 in T cell activation. Thus, forkhead genes promise insight into the mechanisms of immunoregulation in several immune cell lineages, and their dysregulation likely contributes to the pathogenesis of several immunological disorders, suggesting that their study will lead to the development of novel therapeutic agents.
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Affiliation(s)
- H Jonsson
- Division of Rheumatology, Department of Internal Medicine, Washington University School of Medicine, 660 S. Euclid Ave., St. Louis, MO 63110, USA
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Yang WL, Tian J, Peng SL, Guan JF, Ding LS. [Chemical constituents of Diuranthera inarticulata]. Yao Xue Xue Bao 2001; 36:590-4. [PMID: 12579935] [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
AIM To investigate the chemical constituents from the roots of Diuranthera inarticulata Wang et K. Y. Lang. METHODS The compounds were isolated with silica gel column chromatography and their structures were identified on the basis of spectral data and TLC with authentic samples. RESULTS From the methanolic extracts of the roots of Diuranthera inarticulata, ten compounds were obtained and nine of them were identified as chloromaloside A (III), diuranthoside A (IV), diuranthoside B (V), diuranthoside F (VI), diuranthoside G (VII), 2 alpha, 3 alpha, 19 alpha-trihydroxy-urs-12-en-28-oic acid (VIII), 3,6,7,3',4'-pentamethoxy flavone (IX), gitogenin (X) and daucosterol (XI). III-VI showed inhibition of growth with the yeast, Candida albicans. III, IV and VI also showed inhibition of growth with fungus, Aspergillus niger, in the test of antibacterial activity. CONCLUSION All of these compounds were isolated from this plant for the first time. Among them, VI and VII are new steroidal saponins.
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Affiliation(s)
- W L Yang
- Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China
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Chen FZ, Peng SL, Ding LS, He YH, Wang MK. [Chemical constituents from the fruit of Rosa bella Rehd. et Wils]. Zhongguo Zhong Yao Za Zhi 2001; 26:549-51. [PMID: 12776369] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 03/02/2023]
Abstract
OBJECTIVE To investigate the chemical constituents from the fruit of Rosa bella and its bioactivity. METHOD The compounds were isolated from the methanol extract by column chromatography, then identified by 1H, 13C NMR and by comparison with authentic samples. The unorganized hoptoad heart was used for testing the contracting force of cardiac muscle and enzymology for measuring the bloody lipid of serum in rats. RESULT Seven compounds were isolated and identified as pomolic acid, tiliroside, euscaphic acid, daucosterol, quercetin, oleanolic acid and beta-sitosterol, respectively. In the concentration of 0.4-1.0 mg.ml-1, the methanol extract had obvious cardiotonic effect. While at 400 mg.kg-1, there are no obvious effect to the TC, HDL-ac and TG of serum in rats. CONCLUSION The isolated compounds may be the active components of this plant.
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Affiliation(s)
- F Z Chen
- Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, Sichuan, China
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Abstract
NFAT transcription factors play critical roles in gene transcription during immune responses. To investigate further the two most prominent NFAT family members, NFATc1 and NFATc2, we generated mice bearing lymphoid systems devoid of both. Doubly deficient T cells displayed cell surface markers of activation yet were significantly deficient in the development of multiple effector functions, including Th cytokine production, surface effector molecule expression, and cytolytic activity. Nevertheless, doubly deficient B cells were hyperactivated, as evidenced by extremely elevated serum IgG1 and IgE, as well as plasma cell expansion and infiltration of end organs. Thus, in T cells, NFATc1 and NFATc2 are dispensable for inflammatory reactivity but are required for effector differentiation, while in B cells, NFATs regulate both normal homeostasis and differentiation.
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Affiliation(s)
- S L Peng
- Department of Immunology and Infectious Diseases, Harvard School of Public Health, Boston, MA 02115, USA
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Huang KX, Tao ZM, Zhang AJ, Peng SL, Ding LS. [Studies on chemical constituents of Curcuma aromatica salisb]. Zhongguo Zhong Yao Za Zhi 2000; 25:163-5. [PMID: 12212100] [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: 02/26/2023]
Abstract
OBJECTIVE To study the effective ingredients of Curcuma aromatica. METHOD Solvent extraction was used. The constituents were isolated with resin D-101 silica gel column and thin-layer chromatography, and the structures were elucidated by physico-chemical properties and spectral analysis. RESULT Curdione, neocurdione, curcumol, tetramethylpyrazine and (R)-(+)-1,2-hexadecanediol were isolated from C. aromatica. CONCLUSION Neocurdione and (R)-(+)-1,2-hexadecanediol were isolated from C. aromatica for the first time, and was isolated from Curcuma and reported for the first time.
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Affiliation(s)
- K X Huang
- Department of Chemistry, Wenzhou Medical College, Wenzhou 325027, Zhejiang, China
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Cao KF, Peng SL. Complexity of routes to chaos and global regularity of fractal dimensions in bimodal maps. Phys Rev E Stat Phys Plasmas Fluids Relat Interdiscip Topics 1999; 60:2745-60. [PMID: 11970079 DOI: 10.1103/physreve.60.2745] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/1999] [Indexed: 11/07/2022]
Abstract
The dual-star composition rule of doubly superstable (DSS) sequences presents a complete renormalizable algebraic structure for studying Feigenbaum's metric universality and self-similar classification of DSS sequences in symbolic dynamics of bimodal maps of the interval. Here an important feature is that the complete combinations of up- and down-star products create all the generalized Feigenbaum's routes of transitions to chaos. These routes can be classified into two types: one consists of countably infinitely many regular routes which preserve Feigenbaum's metric universality; another consists of uncountably infinitely many universal nonscaling routes described by the irregularly mixed dual-star products, which break Feigenbaum's asymptotically convergent metric universality although they are structurally universal. The combinatorial complexity of dual-star products may increase the grammatical complexity of languages of symbolic dynamics. Moreover, it is found that there exists a global regularity between the fractal dimensions d and the scaling factors [alpha(C),alpha(D)] for Feigenbaum-type attractors: d(Z)log(/Z/)/alpha(C)(Z)alpha(D)(Z)/=beta((2)), where beta((2)) is independent of the concrete DSS sequences Z.
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Affiliation(s)
- K F Cao
- Center for Nonlinear Complex Systems, Department of Physics, College of Science, Yunnan University, Kunming, Yunnan 650091, China and CCAST (World Laboratory), P.O. Box 8730, Beijing 100080, China.
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Fatenejad S, Peng SL, Disorbo O, Craft J. Central T cell tolerance in lupus-prone mice: influence of autoimmune background and the lpr mutation. J Immunol 1998; 161:6427-32. [PMID: 9834135] [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: 02/09/2023]
Abstract
Lupus-prone mice develop a systemic autoimmune disease that is dependent upon the B cell help provided by autoreactive alphabeta CD4+ T cells. Since autoreactive T cells with high affinity for self peptides are normally deleted in the thymus, their presence in these mice suggests the possibility that intrathymic negative selection may be defective. Here, we directly compared central T cell tolerance in response to a conventional peptide Ag in lupus-prone MRL/MpJ mice with a nonautoimmune strain using an MHC class II-restricted TCR transgene. Our results did not demonstrate any defects after Ag exposure in the induction of intrathymic deletion of immature CD4+ CD8+ thymocytes, in TCR down-regulation, or in the number of apoptotic thymocytes in MRL/MpJ compared with nonautoimmune mice. Furthermore, we found that the lpr mutation had no influence upon the Ag-induced thymic deletion of immature thymocytes. These data support the notion that T cell autoreactivity in MRL/MpJ mice is caused by defects in peripheral control mechanisms.
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MESH Headings
- Amino Acid Sequence
- Animals
- Apoptosis/genetics
- Apoptosis/immunology
- Autoimmune Diseases/genetics
- Cell Line
- Clonal Deletion/genetics
- Columbidae
- Cytochrome c Group/immunology
- Down-Regulation/genetics
- Down-Regulation/immunology
- Gene Rearrangement, alpha-Chain T-Cell Antigen Receptor/immunology
- Immune Tolerance/genetics
- Lupus Nephritis/genetics
- Lupus Nephritis/immunology
- Lymphocyte Activation/genetics
- Mice
- Mice, Inbred C57BL
- Mice, Inbred MRL lpr
- Mice, Transgenic
- Molecular Sequence Data
- Mutation/immunology
- Peptides/immunology
- Receptors, Antigen, T-Cell, alpha-beta/biosynthesis
- Receptors, Antigen, T-Cell, alpha-beta/genetics
- Receptors, Antigen, T-Cell, alpha-beta/physiology
- T-Lymphocyte Subsets/immunology
- Thymus Gland/cytology
- Thymus Gland/immunology
- Thymus Gland/metabolism
- fas Receptor/genetics
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Affiliation(s)
- S Fatenejad
- Section of Rheumatology, Yale University School of Medicine, New Haven, CT 06520-8031, USA
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19
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Abstract
Four triterpenoid saponins were isolated from Berneuxia thibetica. On the basis of chemical and spectroscopic evidence, three new saponins, berneuxia saponins A, B and C, were elucidated as 21-tigloylbarringtogenol C-3 beta-O-alpha-L-rhamnopyranosyl(1-->2)-beta-D-galactopyranosyl(1-->3)[bet a- D-glucopyranosyl(1-->2)-beta-D-glucuronopyranoside], 28-tigloylbarringtogenol C-3 beta-O-alpha-L-rhamnopyranosyl(1-->2)-beta-D-galactopyranosyl(1-->3)[bet a- D-glucopyranosyl(1-->2)-beta-D-glucuronopyranoside] and 16 alpha-28-dihydroxyolean-12-en-21-one-3-O-alpha-L-rhamnopyranosyl(1 -->2) -beta-D-galactopyranosyl(1-->3)[beta-D-glucopyranosyl(1-->2)-beta-D- glucuronopyranoside]. The known saponin was desacyl jegosaponin.
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Affiliation(s)
- M K Wang
- Laboratory of Natural Materia Medica, Chengdu Institute of Biology, Chinese Academy of Sciences, P.R. China
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20
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Abstract
Gastric cancer is two to four-fold more common in Maori and Pacific Island ethnic groups compared with Europeans. This study aimed to determine if intestinal metaplasia was more common in these ethnic groups. Patients attending for endoscopy for dyspepsia had six biopsies to determine the presence of Helicobacter pylori by at least two of the following tests: rapid urease test, 13C urea breath test, culture of histology and the presence, extent and subtypes of intestinal metaplasia. Biopsies were taken from 158 patients: Europeans (42%), Maori (23%), Pacific Islanders (35%). Helicobacter pylori and intestinal metaplasia were detected in 88 and 60% of Maori/Pacific Island patients, respectively, and 47 and 29% of Europeans, respectively. Type I intestinal metaplasia was detected in 43% of all patients, type II (26%) and type III (7.0%). The mean age of Maori/Pacific Island patients with intestinal metaplasia and type III intestinal metaplasia was 53 and 51 years respectively, compared with Europeans aged 65 and 72 years. Univariate analysis showed that intestinal metaplasia was associated with ethnicity and H. pylori (P < 0.001) but not age, smoking, endoscopic diagnosis or gender. Intestinal metaplasia is more common and occurs at an earlier age in Maori and Pacific Island patients.
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Affiliation(s)
- A G Fraser
- Department of Medicine, University of Auckland, New Zealand.
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21
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Peng SL, Moslehi J, Robert ME, Craft J. Perforin protects against autoimmunity in lupus-prone mice. J Immunol 1998; 160:652-60. [PMID: 9551899] [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: 02/07/2023]
Abstract
The roles of cytolytic regulatory mechanisms in the immune system of lupus-prone mice were examined in perforin-deficient animals bearing functional or defective (lpr) Fas Ag (CD95). Perforin-deficient Fas+ animals developed accelerated autoimmunity, characterized by increased hypergammaglobulinemia, autoantibody production, and immune deposit-related end-organ disease compared with perforin-intact counterparts. In comparison, perforin-deficient lpr animals had accelerated mortality compared with perforin-intact lpr mice, associated with the abnormal accumulation of CD3+CD4-CD8- alphabeta T cells in conjunction with unaltered hypergammaglobulinemia, autoantibody production, and immune complex renal disease. These results indicate that cytolytic lymphoid regulation plays critical roles in the immune homeostasis of lupus-prone animals, and identify perforin-mediated cytotoxicity as a specific mechanism in the regulation of systemic autoimmunity.
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Affiliation(s)
- S L Peng
- Department of Biology, Yale University, New Haven, CT 06510, USA
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22
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Abstract
Murine lupus in MRL mice has been strongly attributed to alphabeta T cell-dependent mechanisms. Non-alphabeta T cell-dependent mechanisms, such as gammadelta T cells, have been shown to drive antibody and autoantibody production, but they have not been considered capable of inducing end-organ disease. Here, we have expanded upon the findings of such previous work by examining the mechanism and extent of end-organ disease attainable via gammadelta T cells and/or non-alphabeta T cell-dependent mechanisms, assessing two prototypical lupus lesions, renal and skin disease, in TCR alpha -/- MRL mice that possessed either functional or defective Fas antigen (Fas + or lpr). Observed to 1 year of age, TCR alpha -/- MRL mice developed disease characterized by increased mortality, overt renal disease and skin lesions. While delayed in onset and/or reduced in severity compared with TCR alpha +/+ MRL/lpr animals, renal and skin lesions in alphabeta T cell-deficient animals were clearly increased in severity compared with age-matched control non-autoimmune mice. In contrast to TCR alpha +/+ MRL mice, whose disease reflected pan-isotype immune complex deposition with significant complement fixation, renal disease in TCR alpha -/- MRL animals reflected predominantly IgG1 immune complex deposition, with poor complement fixation. Thus, this study demonstrates conclusively that non-alphabeta T cell-dependent mechanisms can induce renal and skin injury in murine lupus, but at least in the kidney, only via humoral autoimmunity of a relatively non-pathological isotype which results in the delayed onset of end-organ damage.
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Affiliation(s)
- S L Peng
- Section of Rheumatology, Yale University School of Medicine, New Haven, CT, USA
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23
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Abstract
The systemic autoimmune syndrome of MRL/Mp-lpr/lpr (MRL/lpr) mice consists of severe pan-isotype hypergammaglobulinemia, autoantibody production, lymphadenopathy, and immune complex-associated end-organ disease. Its pathogenesis has been largely attributed to helper alphabeta T cells that may require critical cytokines to propagate pathogenic autoantibody production. To investigate the roles of prototypical Th1 and Th2 cytokines in the pathogenesis of murine lupus, IFN-gamma -/- and IL-4 -/- lupus-prone mice were generated by backcrossing cytokine knockout animals against MRL/lpr breeders. IFN-gamma -/- animals produced significantly reduced titers of IgG2a and IgG2b serum immunoglobulins as well as autoantibodies, but maintained comparable levels of IgG1 and IgE in comparison to cytokine-intact controls; in contrast, IL-4 -/- animals produced significantly less IgG1 and IgE serum immunoglobulins, but maintained comparable levels of IgG2a and IgG2b as well as autoantibodies in comparison to controls. Both IFN-gamma -/- and IL-4 -/- mice, however, developed significantly reduced lymphadenopathy and end-organ disease. These results suggest that IFN-gamma and IL-4 play opposing but dispensable roles in the development of lupus-associated hypergammaglobulinemia and autoantibody production; however, they both play prominent roles in the pathogenesis of murine lupus-associated tissue injury, as well as in lpr-induced lymphadenopathy.
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Affiliation(s)
- S L Peng
- Section of Rheumatology, Yale University School of Medicine, New Haven, Connecticut 06510, USA
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MESH Headings
- Animals
- B-Lymphocytes/physiology
- Disease Models, Animal
- Humans
- Lupus Erythematosus, Systemic/physiopathology
- Mice
- Mice, Inbred MRL lpr
- Models, Immunological
- Receptors, Antigen, T-Cell, alpha-beta/physiology
- Receptors, Antigen, T-Cell, gamma-delta/physiology
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Affiliation(s)
- S L Peng
- Section of Rheumatology, Yale University School of Medicine, New Haven, Connecticut 06510, USA
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Peng SL, McNiff JM, Madaio MP, Ma J, Owen MJ, Flavell RA, Hayday AC, Craft J. alpha beta T cell regulation and CD40 ligand dependence in murine systemic autoimmunity. The Journal of Immunology 1997. [DOI: 10.4049/jimmunol.158.5.2464] [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: 01/01/2023]
Abstract
Abstract
To explore the mechanisms by which alpha beta T cells and gamma delta T cells regulate systemic autoimmunity, lupus-prone mice were rendered deficient in CD40 ligand and/or alpha beta T cells by intercrossing CD40L -/- and TCR-alpha -/- knockouts, generating CD40L-intact or -deficient (CD40L+ or CD40L-), alpha beta T cell-intact or -deficient (alpha beta+ or alpha beta-) MRL-lpr/lpr animals. As expected, CD40L+ alpha beta+ mice developed high titer autoantibodies along with severe renal and cutaneous disease. CD40L+ alpha beta- animals developed lower levels of autoantibodies, accompanied by less severe or delayed renal and cutaneous disease. CD40L- alpha beta+ mice developed even lower titers of autoantibodies and less severe renal disease yet developed cutaneous lesions indistinguishable from those of CD40L+ alpha beta+ disease. Most surprisingly, CD40L- alpha beta- animals developed higher levels of some autoantibodies than did CD40L- alpha beta+ mice and developed renal disease similar in severity to CD40L+ alpha beta- counterparts; however, they failed to develop skin disease. Thus, disruption of CD40L and alpha beta T cells provides a novel dissection of the physiology and pathology of murine lupus; while these data confirm previous findings demonstrating a role for CD40L-dependent, alpha beta T cell-dependent mechanisms in autoantibody production and renal disease in murine lupus, they also: 1) establish that alpha beta T cells may drive autoimmune skin disease by a CD40L-independent mechanism; 2) identify a role for CD40L in non-alpha beta T cell-dependent autoantibody production and autoimmune skin disease; and 3) suggest a role for alpha beta T cells in the down-regulation of autoimmunity driven by other T cells. Thus, both alpha beta and non-alpha beta T cells, such as gamma delta T cells, regulate systemic autoimmunity by CD40L-dependent and -independent mechanisms.
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Affiliation(s)
- S L Peng
- Section of Rheumatology, Yale University School of Medicine, New Haven, CT 06510, USA
| | - J M McNiff
- Section of Rheumatology, Yale University School of Medicine, New Haven, CT 06510, USA
| | - M P Madaio
- Section of Rheumatology, Yale University School of Medicine, New Haven, CT 06510, USA
| | - J Ma
- Section of Rheumatology, Yale University School of Medicine, New Haven, CT 06510, USA
| | - M J Owen
- Section of Rheumatology, Yale University School of Medicine, New Haven, CT 06510, USA
| | - R A Flavell
- Section of Rheumatology, Yale University School of Medicine, New Haven, CT 06510, USA
| | - A C Hayday
- Section of Rheumatology, Yale University School of Medicine, New Haven, CT 06510, USA
| | - J Craft
- Section of Rheumatology, Yale University School of Medicine, New Haven, CT 06510, USA
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26
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Peng SL, McNiff JM, Madaio MP, Ma J, Owen MJ, Flavell RA, Hayday AC, Craft J. alpha beta T cell regulation and CD40 ligand dependence in murine systemic autoimmunity. J Immunol 1997; 158:2464-70. [PMID: 9036998] [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: 02/03/2023]
Abstract
To explore the mechanisms by which alpha beta T cells and gamma delta T cells regulate systemic autoimmunity, lupus-prone mice were rendered deficient in CD40 ligand and/or alpha beta T cells by intercrossing CD40L -/- and TCR-alpha -/- knockouts, generating CD40L-intact or -deficient (CD40L+ or CD40L-), alpha beta T cell-intact or -deficient (alpha beta+ or alpha beta-) MRL-lpr/lpr animals. As expected, CD40L+ alpha beta+ mice developed high titer autoantibodies along with severe renal and cutaneous disease. CD40L+ alpha beta- animals developed lower levels of autoantibodies, accompanied by less severe or delayed renal and cutaneous disease. CD40L- alpha beta+ mice developed even lower titers of autoantibodies and less severe renal disease yet developed cutaneous lesions indistinguishable from those of CD40L+ alpha beta+ disease. Most surprisingly, CD40L- alpha beta- animals developed higher levels of some autoantibodies than did CD40L- alpha beta+ mice and developed renal disease similar in severity to CD40L+ alpha beta- counterparts; however, they failed to develop skin disease. Thus, disruption of CD40L and alpha beta T cells provides a novel dissection of the physiology and pathology of murine lupus; while these data confirm previous findings demonstrating a role for CD40L-dependent, alpha beta T cell-dependent mechanisms in autoantibody production and renal disease in murine lupus, they also: 1) establish that alpha beta T cells may drive autoimmune skin disease by a CD40L-independent mechanism; 2) identify a role for CD40L in non-alpha beta T cell-dependent autoantibody production and autoimmune skin disease; and 3) suggest a role for alpha beta T cells in the down-regulation of autoimmunity driven by other T cells. Thus, both alpha beta and non-alpha beta T cells, such as gamma delta T cells, regulate systemic autoimmunity by CD40L-dependent and -independent mechanisms.
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Affiliation(s)
- S L Peng
- Section of Rheumatology, Yale University School of Medicine, New Haven, CT 06510, USA
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Olhoffer IH, Peng SL, Craft J. Revisiting autoantibody profiles in systemic lupus erythematosus. J Rheumatol Suppl 1997; 24:297-302. [PMID: 9034986] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
OBJECTIVE To obtain more definitive assays of the spectrum of soluble autoantigens targeted by individual patients with systemic lupus erythematosus (SLE) and to determine whether the autoimmune response is restricted in specificity. Although there are many reports of a broad spectrum of autoantibody specificities in SLE, none has considered the diversity of autoantibody sets, which may more accurately describe the autoimmune response. METHODS Sera of 68 patients with SLE were assayed for autoantibodies by ELISA and/or immunoprecipitation. Specificities were grouped into sets, including double stranded (ds) DNA and/or histone, U1 RNP and/or Sm, Ro and/or La, ribosomes, Ku, Ki, and others. An analysis was also performed of reported SLE autoantibody profiles. RESULTS The prevalences of autoantibody sets included: dsDNA and/or histone, 59%; U1 RNP and/or Sm, 40%; Ro and/or La, 41%; ribosomes, 4.4%; Ku, 4.4%; Ki, 2.9%. On average, autoantibody positive patients had 2-3 autoantibodies (median = 2) and about 2-3 autoantibody sets (median = 2), consistent with a retrospective analysis of past studies. CONCLUSION Immune dysregulation in SLE generally involves a multiplicity of autoantibody specificities. These data further support a model in which global immune dysregulation in SLE leads to organ-nonspecific autoimmunity against particular ubiquitous autoantigens.
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Affiliation(s)
- I H Olhoffer
- Section of Rheumatology, Yale University School of Medicine, New Haven, CT, USA
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Lin SK, Ho ES, Lo FC, Peng SL, Lee YH. Assessment of trophoblastic flow in abnormal first trimester intrauterine pregnancy. Zhonghua Yi Xue Za Zhi (Taipei) 1997; 59:1-6. [PMID: 9134816] [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: 02/04/2023]
Abstract
BACKGROUND The use of color Doppler sonography in assessing feto-maternal circulation during pregnancy has recently been advocated. However, studies of evaluation of trophoblastic flow in the first trimester of pregnancy, with color Doppler sonography, are rare. The objects of this study were to assess the trophoblastic flow in first trimester pregnancy failure by using transvaginal color Doppler sonography, and attempted to elucidate the pathophysiology of early feto-maternal circulation. METHODS One hundred and five cases of first trimester intrauterine pregnancy were enrolled in this study, including 34 cases of blighted ova, 50 missed abortions and 21 normal pregnancies. All patients received transvaginal sonography (Acuson 128, 5MHz). First, color Doppler was mapped and then trophoblastic flow (TBF) was detected and the resistance index (RI) was calculated. Main uterine artery (UA) flow was measured in the later part of this study. Serial sonographic examinations with serum beta-human chorionic gonadotropin (beta-hCG) levels were obtained to confirm a diagnosis of pregnancy failure. Discrepancy in gestational age calculated by the last menstrual period and by sonar measurement was recorded for analysis. The aborted tissues were submitted for karyotyping from six cases of normal pregnancy, 11 cases of blighted ovum and 22 cases of missed abortion. RESULTS Preliminary result showed TBF can be detected at as early as the fifth week of gestation. The RIs of TBF and UA seemed to decrease; however, serum beta-hCG levels increased as gestational age advanced in normal pregnancies. This change was not shown in the abnormal groups. No significant difference in the RI of TBF or UA flow was noted between normal and abnormal pregnancies. Also the result of karyotyping did not correlate well with the RIs of TBF and UA, and serum beta-hCG levels. CONCLUSIONS The assessment of feto-maternal circulation in early pregnancy does provide information on the physiology of early normal placentation, but not of the early pregnancy failure. Limited case numbers and different time intervals between fetal demise and sonographic diagnosis may play roles in the above findings.
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Affiliation(s)
- S K Lin
- Department of Obstetrics and Gynecology, Taichung Veterans General Hospital, Taiwan, R.O.C
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30
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Peng SL, Madaio MP, Hayday AC, Craft J. Propagation and regulation of systemic autoimmunity by gammadelta T cells. The Journal of Immunology 1996. [DOI: 10.4049/jimmunol.157.12.5689] [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: 01/01/2023]
Abstract
Abstract
Although many studies have demonstrated a pathogenic role for alphabeta T cells in murine lupus, little work has addressed gammadelta T cells. Here, the roles of alphabeta and gammadelta T cells in the pathogenesis of systemic autoimmunity were investigated by generating lupus-prone mice deficient in alphabeta T cells and/or gammadelta T cells. Mice deficient in gammadelta T cells developed an exacerbated disease phenotype compared with that of T cell-intact mice, consisting of augmented hypergammaglobulinemia and autoantibody production, more severe renal disease, and increased mortality, associated with a polyclonal expansion of conventional CD4+ alphabeta T cells. Conversely, alphabeta T cell-deficient animals developed a partial lupus syndrome, characterized by isotype-specific hypergammaglobulinemia, incompletely penetrant autoantibodies, and mild immune complex renal disease, all of which were driven by gammadelta T cell-dependent help. These data indicate that gammadelta T cells participate in both the regulation and the propagation of murine lupus.
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Affiliation(s)
- S L Peng
- Department of Biology, Yale University, New Haven, CT 06510, USA
| | - M P Madaio
- Department of Biology, Yale University, New Haven, CT 06510, USA
| | - A C Hayday
- Department of Biology, Yale University, New Haven, CT 06510, USA
| | - J Craft
- Department of Biology, Yale University, New Haven, CT 06510, USA
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Peng SL, Fatenejad S, Craft J. Induction of nonpathologic, humoral autoimmunity in lupus-prone mice by a class II-restricted, transgenic alpha beta T cell. Separation of autoantigen-specific and -nonspecific help. The Journal of Immunology 1996. [DOI: 10.4049/jimmunol.157.12.5225] [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: 01/01/2023]
Abstract
Abstract
Murine lupus predominantly requires alpha beta T cells, which provide pathogenic help for autoantibody production and immune complex-associated end-organ disease. Autoantigen-specific, pathogenic alpha beta T cells have been isolated from some lupus-prone mice, but a requirement for such T cells in disease has not been clearly demonstrated. To address alpha beta T cell specificity in murine lupus, lupus-prone mice were generated that contained only a single population of alpha beta T cells of foreign specificity by generating anti-pigeon cytochrome c (AND) TCR transgenic TCRalpha -/- TCRbeta -/- MRL/Mp-lpr/lpr (MRL/lpr) mice, which lacked the ability to express endogenous TCRalpha or -beta genes. These AND alpha beta T cells induced hypergammaglobulinemia and autoantibody production, as seen in serum Ig, anti-DNA, anti-small nuclear ribonucleoprotein (snRNP) and rheumatoid factor titers, but failed to promote the development of lymphadenopathy or pathogenic immune-complex disease, as assayed by cutaneous, renal, and salivary gland lesions. Thus, antigen-nonspecific alpha beta T cell help can promote generalized autoimmunity, but autoantigen-specific alpha beta T cells are required to cause overt disease.
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Affiliation(s)
- S L Peng
- Department of Biology, Yale University, New Haven, CT 06510, USA
| | - S Fatenejad
- Department of Biology, Yale University, New Haven, CT 06510, USA
| | - J Craft
- Department of Biology, Yale University, New Haven, CT 06510, USA
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Peng SL, Madaio MP, Hayday AC, Craft J. Propagation and regulation of systemic autoimmunity by gammadelta T cells. J Immunol 1996; 157:5689-98. [PMID: 8955223] [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: 02/03/2023]
Abstract
Although many studies have demonstrated a pathogenic role for alphabeta T cells in murine lupus, little work has addressed gammadelta T cells. Here, the roles of alphabeta and gammadelta T cells in the pathogenesis of systemic autoimmunity were investigated by generating lupus-prone mice deficient in alphabeta T cells and/or gammadelta T cells. Mice deficient in gammadelta T cells developed an exacerbated disease phenotype compared with that of T cell-intact mice, consisting of augmented hypergammaglobulinemia and autoantibody production, more severe renal disease, and increased mortality, associated with a polyclonal expansion of conventional CD4+ alphabeta T cells. Conversely, alphabeta T cell-deficient animals developed a partial lupus syndrome, characterized by isotype-specific hypergammaglobulinemia, incompletely penetrant autoantibodies, and mild immune complex renal disease, all of which were driven by gammadelta T cell-dependent help. These data indicate that gammadelta T cells participate in both the regulation and the propagation of murine lupus.
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MESH Headings
- Animals
- Antigen-Antibody Complex/metabolism
- Autoantibodies/biosynthesis
- Autoimmune Diseases/immunology
- Autoimmunity
- Cytokines/biosynthesis
- Gene Expression
- Kidney/pathology
- Lupus Erythematosus, Systemic/immunology
- Lupus Erythematosus, Systemic/pathology
- Lymphoid Tissue/cytology
- Mice
- Mice, Knockout
- RNA, Messenger/genetics
- Receptors, Antigen, T-Cell, alpha-beta/physiology
- Receptors, Antigen, T-Cell, gamma-delta
- Spleen/metabolism
- T-Lymphocyte Subsets/immunology
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Affiliation(s)
- S L Peng
- Department of Biology, Yale University, New Haven, CT 06510, USA
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33
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Peng SL, Fatenejad S, Craft J. Induction of nonpathologic, humoral autoimmunity in lupus-prone mice by a class II-restricted, transgenic alpha beta T cell. Separation of autoantigen-specific and -nonspecific help. J Immunol 1996; 157:5225-30. [PMID: 8955166] [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: 02/03/2023]
Abstract
Murine lupus predominantly requires alpha beta T cells, which provide pathogenic help for autoantibody production and immune complex-associated end-organ disease. Autoantigen-specific, pathogenic alpha beta T cells have been isolated from some lupus-prone mice, but a requirement for such T cells in disease has not been clearly demonstrated. To address alpha beta T cell specificity in murine lupus, lupus-prone mice were generated that contained only a single population of alpha beta T cells of foreign specificity by generating anti-pigeon cytochrome c (AND) TCR transgenic TCRalpha -/- TCRbeta -/- MRL/Mp-lpr/lpr (MRL/lpr) mice, which lacked the ability to express endogenous TCRalpha or -beta genes. These AND alpha beta T cells induced hypergammaglobulinemia and autoantibody production, as seen in serum Ig, anti-DNA, anti-small nuclear ribonucleoprotein (snRNP) and rheumatoid factor titers, but failed to promote the development of lymphadenopathy or pathogenic immune-complex disease, as assayed by cutaneous, renal, and salivary gland lesions. Thus, antigen-nonspecific alpha beta T cell help can promote generalized autoimmunity, but autoantigen-specific alpha beta T cells are required to cause overt disease.
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Affiliation(s)
- S L Peng
- Department of Biology, Yale University, New Haven, CT 06510, USA
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Abstract
Humoral and end-organ parameters of autoimmunity were investigated in LG/J mice, which have traditionally been considered normal, non-diseased animals. Surprisingly, LG/J mice were found to possess autoantibodies, including antinuclear antibodies and rheumatoid factor, and to develop renal disease, including glomerulonephritis, interstitial nephritis, and perivasculitis, but not hepatic or cutaneous disease. In contrast, age-matched, identically-housed control animals failed to develop autoantibodies or end-organ disease. These findings have complications for the genetic study of lupus erythematosus in the MRL murine model, which derives heavily from the LG/J background. Thus, the LG/J strain may provide a useful model in the analysis of autoimmunity.
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Affiliation(s)
- S L Peng
- Department of Biology, Yale University, New Haven, CT, USA
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35
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Peng SL, Cao KF. Global scaling behaviors and chaotic measure characterized by the convergent rates of period-p-tupling bifurcations. Phys Rev E Stat Phys Plasmas Fluids Relat Interdiscip Topics 1996; 54:3211-3220. [PMID: 9965463 DOI: 10.1103/physreve.54.3211] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Affiliation(s)
- S L Peng
- Yale University School of Medicine, New Haven, CT, USA
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Abstract
Fas (CD95) and its ligand are central regulatory molecules in hematopoietic cells. Previous studies have suggested a role for Fas in the regulation of tumor progression, but Fas has not yet been conclusively identified as a tumor suppressor. Fas-deficient individuals lack malignant tumors, perhaps because of regulation by T cells. To investigate such a possibility, mice deficient in both T cells and Fas were generated, and they were found to develop severe B cell dysregulation characterized by malignant, lethal B cell lymphoma. Lymphoma arose from a monoclonal B220+CD19-CD5-CD23- B cell secreting immunoglobulin M, kappa rheumatoid factor. In contrast, animals containing alpha beta T cells, gamma delta T cells, and/or functional Fas suppressed the development of lymphoma. These data indicate that Fas functions as a tumor suppressor, and identifies roles for both alpha beta T cells and gamma delta T cells in Fas-independent tumor regulation.
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Affiliation(s)
- S L Peng
- Section of Rheumatology, Yale University School of Medicine, New Haven, Connecticut, USA
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38
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Peng SL, Madaio MP, Hughes DP, Crispe IN, Owen MJ, Wen L, Hayday AC, Craft J. Murine lupus in the absence of alpha beta T cells. J Immunol 1996; 156:4041-9. [PMID: 8621947] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
To investigate the possibility that non-alpha beta T cell-dependent mechanisms can induce systemic autoimmune disease, and to address the roles of alpha beta T cells in murine lupus, we analyzed lupus-prone MRL mice congenitally deficient in alpha beta T cells. Surprisingly, TCR-alpha-/- MRL mice developed several characteristics of human systemic lupus erythematosus, including hypergammaglobulinemia, autoantibodies against DNA and small nuclear ribonucleoproteins, and immune deposits in kidneys. These results, which contrast with past studies concluding that MRL autoimmunity requires CD4+ alpha beta T cells, demonstrate that non-alpha beta T cell-dependent mechanisms are capable of inducing lupus phenomena, and further suggest that MRL disease may consist of both alpha beta T cell-independent and alpha beta T cell-dependent mechanisms.
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MESH Headings
- Animals
- Antibodies, Antinuclear/analysis
- Antibody Specificity/genetics
- Disease Models, Animal
- Humans
- Hypergammaglobulinemia/genetics
- Hypergammaglobulinemia/immunology
- Lupus Erythematosus, Systemic/genetics
- Lupus Erythematosus, Systemic/immunology
- Lupus Erythematosus, Systemic/pathology
- Lupus Nephritis/genetics
- Lupus Nephritis/immunology
- Lupus Nephritis/pathology
- Lymphoproliferative Disorders/genetics
- Lymphoproliferative Disorders/immunology
- Lymphoproliferative Disorders/pathology
- Mice
- Mice, Mutant Strains
- Receptors, Antigen, T-Cell, alpha-beta/genetics
- Receptors, Antigen, T-Cell, alpha-beta/immunology
- T-Lymphocytes/pathology
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Affiliation(s)
- S L Peng
- Department of Biology, Yale University, New Haven, CT 06510, USA
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39
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Peng SL, Madaio MP, Hughes DP, Crispe IN, Owen MJ, Wen L, Hayday AC, Craft J. Murine lupus in the absence of alpha beta T cells. The Journal of Immunology 1996. [DOI: 10.4049/jimmunol.156.10.4041] [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: 01/01/2023]
Abstract
Abstract
To investigate the possibility that non-alpha beta T cell-dependent mechanisms can induce systemic autoimmune disease, and to address the roles of alpha beta T cells in murine lupus, we analyzed lupus-prone MRL mice congenitally deficient in alpha beta T cells. Surprisingly, TCR-alpha-/- MRL mice developed several characteristics of human systemic lupus erythematosus, including hypergammaglobulinemia, autoantibodies against DNA and small nuclear ribonucleoproteins, and immune deposits in kidneys. These results, which contrast with past studies concluding that MRL autoimmunity requires CD4+ alpha beta T cells, demonstrate that non-alpha beta T cell-dependent mechanisms are capable of inducing lupus phenomena, and further suggest that MRL disease may consist of both alpha beta T cell-independent and alpha beta T cell-dependent mechanisms.
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Affiliation(s)
- S L Peng
- Department of Biology, Yale University, New Haven, CT 06510, USA
| | - M P Madaio
- Department of Biology, Yale University, New Haven, CT 06510, USA
| | - D P Hughes
- Department of Biology, Yale University, New Haven, CT 06510, USA
| | - I N Crispe
- Department of Biology, Yale University, New Haven, CT 06510, USA
| | - M J Owen
- Department of Biology, Yale University, New Haven, CT 06510, USA
| | - L Wen
- Department of Biology, Yale University, New Haven, CT 06510, USA
| | - A C Hayday
- Department of Biology, Yale University, New Haven, CT 06510, USA
| | - J Craft
- Department of Biology, Yale University, New Haven, CT 06510, USA
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40
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Abstract
MRL/Mp-lpr/lpr mice develop a spontaneous lupus syndrome, including hypergammaglobulinemia, autoantibodies, glomerulonephritis, and lymphadenopathy. To investigate the role of lymphocytes subsets in the pathogenesis of disease, lupus-prone MRL mice deficient in alpha beta T cells, gamma delta T cells, or both were generated. Mice deficient in alpha beta T cells developed a partially penetrant lupus syndrome, characterized by lymphadenopathy, elevated levels of class-switched immunoglobulins, an increased incidence of antinuclear antibodies, and immune deposits in kidneys which progressed to renal insufficiency over time. In comparison to wild type animals, gamma delta T cell-deficient animals developed an accelerated and exacerbated disease phenotype, characterized by accelerated hypergammaglobulinemia and enhanced autoantibody production and mortality. Repertoire analysis of these latter animals identified polyclonal expansion (V beta) of alpha beta CD4+ B220-cells. Mice lacking both alpha beta and gamma delta T cells failed to generate class-switched autoantibodies and immune complex renal disease. First, these findings demonstrate that murine lupus in the setting of Fas-deficiency does not absolutely require the presence of alpha beta T cells, and they also suggest that a significant basis for MRL/lpr disease, including renal disease, involves alpha beta T cell-independent, gamma delta T cell dependent, polyreactive B cell autoimmunity, upon which alpha beta T cell-dependent mechanisms aggravate specific autoimmune responses. Second, these data indicate that gamma delta T cells partake in the regulation of systemic autoimmunity, presumably via their effects on alpha beta CD4+ B220-T cells that provide B cell help. Finally, these results demonstrate that MRL/lpr B cells, despite their intrinsic abnormalities, cannot per se cause tissue injury without T cell help.
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Affiliation(s)
- S L Peng
- Section of Rheumatology, Yale University School of Medicine, New Haven, CT 06520-8031, USA
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41
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Chen ZX, Cao KF, Peng SL. Symbolic dynamics analysis of topological entropy and its multifractal structure. Phys Rev E Stat Phys Plasmas Fluids Relat Interdiscip Topics 1995; 51:1983-1988. [PMID: 9962856 DOI: 10.1103/physreve.51.1983] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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42
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Cao KF, Chen ZX, Peng SL. Global metric regularity of the devil's staircase of topological entropy. Phys Rev E Stat Phys Plasmas Fluids Relat Interdiscip Topics 1995; 51:1989-1995. [PMID: 9962857 DOI: 10.1103/physreve.51.1989] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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43
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Peng SL. Reductionism and encephalitis lethargica, 1916-1939. N J Med 1993; 90:459-62. [PMID: 8414202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
This paper is the 1992 winner of the Annual Stephen Wickes Prize in Medicine, presented by the Medical History Society of New Jersey. The history of encephalitis lethargica reflects a complex interaction between research-oriented science and clinical medicine.
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Affiliation(s)
- S L Peng
- Yale University School of Medicine, New Haven, CT 06510
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44
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Abstract
A clinical study of 25 male and 17 female schizophrenic suicides is presented. Jumping from a height was the most common method used. The 42 suicidal schizophrenics in Taiwan were compared with both 84 sex- and age-matched and 60 5-year illness course non-suicidal schizophrenic control groups. The suicidal schizophrenics were not significantly different from the non-suicidal counterparts of both control groups with regard to age, sex, ethnicity, religion, educational background, the presence of suicide cases in the family history, and the presence of insight, but were significantly different in characteristics of a history of previous suicide attempts, presence of psychotic symptoms during their final month, depression during their final month, a history of depression, a history of previous psychiatric hospitalizations, and the number of hospitalizations. We discuss the findings from this study and others in the literature in the context of the different clinical and socio-cultural backgrounds of these Taiwanese schizophrenic suicides.
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Affiliation(s)
- W H Hu
- Taipei City Psychiatric Center, Taiwan
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45
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Abstract
Leptospira biflexa is a representative of an evolutionarily distinct group of eubacteria. In order to better understand the genetic organization and gene regulatory mechanisms of this species, we have chosen to study the genes required for tryptophan biosynthesis in this bacterium. The nucleotide sequence of the region of the L. biflexa serovar patoc chromosome encoding the trpE and trpG genes has been determined. Four open reading frames (ORFs) were identified in this region, but only three ORFs were translated into proteins when the cloned genes were introduced into Escherichia coli. Analysis of the predicted amino acid sequences of the proteins encoded by the ORFs allowed us to identify the trpE and trpG genes of L. biflexa. Enzyme assays confirmed the identity of these two ORFs. Anthranilate synthase from L. biflexa was found to be subject to feedback inhibition by tryptophan. Codon usage analysis showed that there was a bias in L. biflexa towards the use of codons rich in A and T, as would be expected from its G + C content of 37%. Comparison of the amino acid sequences of the trpE gene product and the trpG gene product with corresponding gene products from other bacteria showed regions of highly conserved sequence.
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Affiliation(s)
- D B Yelton
- Department of Microbiology and Immunology, West Virginia University, Morgantown 26506
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