Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UNIPROT:P43026 (lipopolysaccharide)
 62,215 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Cytokine production was studied in thyroid tissue from patients with Graves' disease, Hashimoto's thyroiditis and non-toxic goitre. The expression of interferon gamma, tumour necrosis factor alpha and beta, interleukin-1 alpha and beta, interleukin-6 and platelet-derived growth factor A chain was assessed by slot-blot analysis of the respective mRNA in freshly isolated tissue samples. All seven cytokines were detected in patients of all groups. Although the respective mRNA levels were, in general, higher in thyroid autoimmune disorders, this appeared to relate to the degree of the lymphocytic infiltration of the thyroid gland at the time of surgery. Purified thyroid follicular cells expressed high levels of interleukin-1 alpha and interleukin-6 mRNA and when established in primary culture, purified thyroid follicular cells from Graves' disease as well as non-toxic goitre produced interleukin-1 alpha and interleukin-6 bioactivity spontaneously. In the case of interleukin-1 this could be further augmented by addition of lipopolysaccharide to the thyroid follicular cell cultures. These results demonstrate that the lymphocytic infiltrate found in autoimmune and non-autoimmune thyroid disorders is associated with cytokine production. Additionally we have shown that intrathyroidal cytokine production is not restricted to thyroid-infiltrating mononuclear cells, but may also involve thyroid follicular cells both in vivo and in vitro. The cytokines produced by thyroid follicular cells may have an important role in stimulating autoantigen specific T cells in vivo as both interleukin-1 and interleukin-6 facilitate T cell activation.
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PMID:Analysis of intrathyroidal cytokine production in thyroid autoimmune disease: thyroid follicular cells produce interleukin-1 alpha and interleukin-6. 268 Jan 82

We have investigated the effects of lipopolysaccharide (LPS) and probucol (a lipid soluble antioxidant) on the gene expression of interleukin 1 alpha and beta (IL-1 alpha and IL-1 beta), and platelet-derived growth factor A chain and B chain (PDGF-A and PDGF-B) in the human monocytic cell line U-937. Steady-state mRNA levels were measured quantitatively by the reverse transcription-polymerase chain reaction (RT-PCR) using a non-radioactive label. Cells were incubated with LPS, in the presence or absence of probucol for 20 h. The cells were harvested and RNA was then prepared, reverse-transcribed in the presence of an internal standard and subsequently amplified and labelled with digoxigenin-11-dUTP by the PCR reaction. The PCR products were subjected to agarose gel electrophoresis, blotted onto nylon membranes and visualised by immunological detection of digoxigenin followed by a chemiluminescent reaction. We found that: (1) LPS treatment of U-937 cells caused an up-regulation of gene expression of IL-1 beta and PDGF-A chain by approximately 250% and 100% respectively, although it did not stimulate the expression of IL-1 alpha nor PDGF-B chain mRNA. (2) Probucol treatment in vitro had no effect on the basal or LPS-stimulated mRNA levels of IL-1 alpha, IL-1 beta, PDGF-A and PDGF-B despite its reported activity in vivo. (3) PDGF-A and PDGF-B were expressed at a similar level in unstimulated U-937 cells approximately 10-50 copies/ng total RNA, whereas the expression of IL-1 beta mRNA was approximately 2-4 times higher than IL-1 alpha mRNA. (4) Finally, in U-937 monocytic cells the expression of IL-1 alpha and IL-1 beta, and PDGF-A and PDGF-B appear to be independently regulated.
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PMID:The effects of LPS and probucol on interleukin 1 (IL-1) and platelet-derived growth factor (PDGF) gene expression in the human monocytic cell line U-937. 831 73