Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0206061 (interstitial pneumonia)
 6,105 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

The autoreactivity of murine cytomegalovirus (MCMV)-neutralizing monoclonal antibody (mAb) AC1 was examined in vitro and in vivo. Both mAb AC1 and a human antiserum reactive with U1-small nuclear ribonucleoprotein (U1-snRNP) stained uninfected mouse embryo fibroblasts (MEF) in a speckled nuclear pattern and reacted with 70,000 molecular weight (MW) MEF nuclear antigens by immunoblotting, suggesting that mAb AC1 cross-reacted with the 70,000 MW component of U1-snRNP. However, only mAb AC1 cross-reacted with an additional epithelial cytoplasmic autoantigen present in cultured HEp2 cells. On tissue sections from uninfected mice, mAb AC1 predominantly reacted with a component of central and peripheral nervous systems, although cross-reactivity with the stratum spinosum of the skin and the outer sheath of hair follicles was also observed. Immunoblotting revealed that mAb AC1 reacted with phosphorylated epitopes present on a 98,000 MW MCMV structural protein and the 200,000 MW mouse neurofilament protein (NFP). Treatment of uninfected mice with mAb AC1 resulted in a severe interstitial pneumonia with greatly thickened and congested alveolar septa. Severe oedema of the hypodermis and a mild mesangial proliferative glomerulonephritis were also observed. These results demonstrate that a mAb reacting with a MCMV structural phosphoprotein which can protect mice against the dissemination of MCMV, can also promote the development of autoimmune disease. Therefore, the production of such cross-reactive antibodies may be an important mechanism in the development of autoimmunity following viral infection.
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PMID:A murine cytomegalovirus-neutralizing monoclonal antibody exhibits autoreactivity and induces tissue damage in vivo. 751 48

Mixed connective tissue disease (MCTD) is characterized by a combination of clinical features of progressive systemic sclerosis, systemic lupus erythematosus, rheumatoid arthritis, polymyositis/dermatomyositis, with a high anti-snRNP antibody titer. Respiratory manifestations, such as interstitial lung disease (ILD), are not well-described. Thirteen patients who met the diagnostic criteria for MCTD and showed ILD on high-resolution CT were analysed retrospectively. A restrictive pattern was found in 73% of cases and TLCO abnormalities in 90%. Exercise hypoxemia was observed in nine out of ten cases. The CT-scan pattern was compatible with non-specific interstitial pneumonia in seven cases and with usual interstitial pneumonia in five. Bronchoalveolar lavage showed lymphocytic alveolitis in two patients, neutrophil alveolitis in eight. Fifty percent ILD patients respond to steroids and immunosuppressive drugs. Progressive ILD (six in 13; 46%) compared with non-progressive ILD associated more systemic sclerosis manifestations (p<0.05). Progressive ILD tend to have more frequent pulmonary hypertension, neutrophilic alveolitis and honey combing pattern. MCTD-ILD characteristics are not specific. When systemic sclerosis manifestations are present, MCTD-ILD seems to associate more frequently pulmonary hypertension and progressive ILD.
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PMID:[Clinical study of interstitial lung disease in mixed connective tissue disease]. 2035 16