Abstract:
:Aberrant expression of the p21Ras proto-oncogene has been reported in lymphoid cells of SLE patients. We previously showed that the expression of the p21Ras stimulatory element, hSOS1, is reduced in PBMC from SLE patients with non-active disease. However, the significance of this finding regarding the regulation and function of the p21Ras pathway and its correlation to disease activity remained unclear. The expression, regulation and function of the p21Ras pathway were determined in 23 ambulatory SLE patients with active and non-active disease and eleven controls. Levels of p21Ras stimulatory element hSOS1 but not p21Ras and its inhibitory element p120GAP were significantly decreased in SLE patients. Early p21Ras signalling was down-regulated in SLE patients with active disease as indicated by the decreased membrane/cytoplasmic (M/C) ratios of the p21Ras regulatory elements hSOS1 and p120GAP and by the non-responsiveness of these ratios to cellular stimulation. Anchorage of p21Ras to the cellular membrane was also significantly decreased in these patients. In contrast, the late p21Ras signalling was up-regulated in SLE patients as indicated by the significantly higher constitutive activity of the p21Ras down stream key regulator enzyme MAP Kinase. Taken together, our data demonstrate for the first time a disease associated functional defect in p21Ras signalling in lymphocytes of SLE patients.
journal_name
J Autoimmunjournal_title
Journal of autoimmunityauthors
Rapoport MJ,Amit M,Aharoni D,Weiss M,Weissgarten J,Bruck N,Buchs A,Bistritzer T,Molad Ydoi
10.1006/jaut.2002.0596subject
Has Abstractpub_date
2002-08-01 00:00:00pages
63-70issue
1-2eissn
0896-8411issn
1095-9157pii
S0896841102905962journal_volume
19pub_type
杂志文章abstract::We have previously described an SLE-derived human hybridoma autoantibody, 9604, which binds to activated but not to resting platelets, inhibits platelet aggregation, and immunoprecipitates a surface-labelled poly-peptide of 32,000 molecular weight (MW) (p32). In the present study, using a murine monoclonal anti-p32 an...
journal_title:Journal of autoimmunity
pub_type: 杂志文章
doi:10.1006/jaut.1995.0008
更新日期:1995-02-01 00:00:00
abstract::Epidemiology is expected to provide important clues to our understanding of the enigmatic etiopathogenesis of primary biliary cirrhosis (PBC). First, a systematic review of population based studies indicated a wide range in the yearly incidence (0.33-5.8/100.000) and point prevalence (1.91-40.2/100.000) rates. Though ...
journal_title:Journal of autoimmunity
pub_type: 杂志文章,评审
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journal_title:Journal of autoimmunity
pub_type: 杂志文章
doi:10.1016/j.jaut.2009.02.004
更新日期:2009-08-01 00:00:00
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journal_title:Journal of autoimmunity
pub_type: 杂志文章
doi:10.1016/s0896-8411(05)80017-4
更新日期:1990-10-01 00:00:00
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journal_title:Journal of autoimmunity
pub_type: 杂志文章
doi:10.1016/j.jaut.2012.02.001
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journal_title:Journal of autoimmunity
pub_type: 杂志文章,评审
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更新日期:2014-02-01 00:00:00
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journal_title:Journal of autoimmunity
pub_type: 杂志文章
doi:10.1016/0896-8411(89)90129-7
更新日期:1989-06-01 00:00:00
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journal_title:Journal of autoimmunity
pub_type: 杂志文章
doi:10.1016/j.jaut.2020.102401
更新日期:2020-03-01 00:00:00
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journal_title:Journal of autoimmunity
pub_type: 杂志文章
doi:10.1016/s0896-8411(89)80002-2
更新日期:1989-10-01 00:00:00
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journal_title:Journal of autoimmunity
pub_type: 杂志文章
doi:10.1016/j.jaut.2012.05.008
更新日期:2012-09-01 00:00:00
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journal_title:Journal of autoimmunity
pub_type: 杂志文章
doi:10.1016/j.jaut.2016.05.013
更新日期:2016-11-01 00:00:00
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journal_title:Journal of autoimmunity
pub_type: 杂志文章,评审
doi:10.1016/j.jaut.2019.01.011
更新日期:2019-05-01 00:00:00
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journal_title:Journal of autoimmunity
pub_type: 杂志文章
doi:10.1006/jaut.1996.0084
更新日期:1996-10-01 00:00:00
abstract::The BB rat spontaneously develops an insulin-dependent diabetes mellitus (IDDM) that closely resembles this disease in man. The pathogenesis involves autoimmune destruction of pancreatic islet beta-cells. In the present study, a single intraperitoneal injection of complete Freund's adjuvant (CFA) in diabetes-prone (DP...
journal_title:Journal of autoimmunity
pub_type: 杂志文章
doi:10.1016/s0896-8411(05)80034-4
更新日期:1990-12-01 00:00:00
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journal_title:Journal of autoimmunity
pub_type: 杂志文章
doi:10.1006/jaut.1995.0017
更新日期:1995-04-01 00:00:00
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journal_title:Journal of autoimmunity
pub_type: 杂志文章
doi:10.1016/s0896-8411(05)80037-x
更新日期:1990-12-01 00:00:00
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journal_title:Journal of autoimmunity
pub_type: 杂志文章
doi:10.1016/j.jaut.2007.07.003
更新日期:2007-09-01 00:00:00
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journal_title:Journal of autoimmunity
pub_type: 杂志文章
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更新日期:2019-03-01 00:00:00
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journal_title:Journal of autoimmunity
pub_type: 杂志文章
doi:10.1016/0896-8411(91)90055-h
更新日期:1991-12-01 00:00:00
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journal_title:Journal of autoimmunity
pub_type: 杂志文章
doi:10.1016/j.jaut.2014.12.005
更新日期:2015-02-01 00:00:00
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journal_title:Journal of autoimmunity
pub_type: 杂志文章
doi:10.1016/0896-8411(92)90008-e
更新日期:1992-08-01 00:00:00
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journal_title:Journal of autoimmunity
pub_type: 杂志文章,评审
doi:10.1016/j.jaut.2020.102468
更新日期:2020-07-01 00:00:00
abstract::Bullous pemphigoid (BP) and linear IgA disease (LAD) are autoimmune subepidermal blistering skin diseases associated with autoantibodies against the transmembrane hemidesmosomal protein BP180/type XVII collagen. It has been demonstrated previously that BP is characterized predominantly by IgG autoantibodies, while aut...
journal_title:Journal of autoimmunity
pub_type: 杂志文章
doi:10.1006/jaut.2000.0437
更新日期:2000-11-01 00:00:00
abstract::Autoimmune hepatitis (AIH) is a chronic autoimmune inflammatory disease that usually requires life-long immunosuppression. Frequent relapses after discontinuation of therapy indicate that intrahepatic immune regulation is not restored by current therapies. As steroid therapy preferentially depletes intrahepatic regula...
journal_title:Journal of autoimmunity
pub_type: 杂志文章
doi:10.1016/j.jaut.2020.102591
更新日期:2021-02-01 00:00:00
abstract::CD4(+) T cells specific for immunologic non-self determinants on self-IgG, idiotopes (Id), can be raised from cerebrospinal fluid (CSF) and blood of patients with multiple sclerosis (MS). To test if Id-specific CD4(+) T cells have the potential to destroy oligodendrocytes (ODCs), we analyzed their ability to induce ap...
journal_title:Journal of autoimmunity
pub_type: 杂志文章
doi:10.1016/j.jaut.2009.01.004
更新日期:2009-03-01 00:00:00
abstract::The features of autoantibodies (autoAb) to liver fumarylacetoacetate hydrolase (FAH) elicited in mice infected with mouse hepatitis virus (MHV) were studied by ELISA and western-blot competition assays. All sera tested contained Ab to cryptic FAH epitopes according with results from western-blot tests, whereas ELISA d...
journal_title:Journal of autoimmunity
pub_type: 杂志文章
doi:10.1016/j.jaut.2004.05.006
更新日期:2004-09-01 00:00:00
abstract::Juvenile idiopathic arthritis (JIA) is the most common chronic inflammatory arthropathy of childhood. Juvenile idiopathic arthritis is believed to be a complex genetic trait influenced by both genetic and environmental factors. Twin and family studies suggest a substantial role for genetic factors in the predispositio...
journal_title:Journal of autoimmunity
pub_type: 杂志文章,评审
doi:10.1016/j.jaut.2015.08.002
更新日期:2015-11-01 00:00:00
abstract::The biology of hematopoietic stem cell (HSC) is a current topic of interest which has important implications for clinical HSC transplantation as well as for the basic research of HSC. The most primitive HSCs in mammals, including mice and humans, have long been believed to be CD34 antigen (Ag)-positive (CD34(+)) cells...
journal_title:Journal of autoimmunity
pub_type: 杂志文章,评审
doi:10.1016/j.jaut.2007.12.004
更新日期:2008-05-01 00:00:00
abstract::Systemic lupus (SLE) is characterized by a break of B cell tolerance that plays a central role in disease pathophysiology. An early checkpoint defect occurs at the transitional stage leading to the survival of autoreactive B cells and consequently the production of pathogenic autoantibodies. The main purpose of our wo...
journal_title:Journal of autoimmunity
pub_type: 杂志文章
doi:10.1016/j.jaut.2019.05.002
更新日期:2019-08-01 00:00:00
abstract::The related tyrosine phosphatase-like proteins (PTP) IA-2 and IA-2beta are autoantigens of type 1 diabetes. Autoantibodies are predominantly against IA-2. We utilized the close homology between IA-2 and IA-2beta PTP domains to design chimeras and mutants in order to identify humoral IA-2-specific epitopes. Fifteen ser...
journal_title:Journal of autoimmunity
pub_type: 杂志文章
doi:10.1016/j.jaut.2003.08.002
更新日期:2003-12-01 00:00:00