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ABSTRACT: Levels of the melanocortin receptor (MCR) 1, 2, 3 and 5 subtypes and pro-opio-melanocortin (POMC) protein mRNA were measured by the real-time quantitative reverse transcriptase polymerase chain reaction method in CD4+ T helper (Th) cells, CD8+ T cytotoxic cells, CD19+ B cells, CD56+ natural killer (NK) cells, CD14+ monocytes and CD15+ granulocytes from healthy donors. We found high levels of all of the MC1, 2, 3 and 5R subtype mRNA in Th cells and moderate levels in NK cells, monocytes and granulocytes. POMC peptide mRNA was found in all examined leucocyte subsets, but only low levels were present in granulocytes. Our findings suggest a co-ordinating role for MCR subtypes and their naturally occurring ligands in the co-operation between innate and adaptive immunity. Moreover, our findings are compatible with earlier finding of MCR-mediated tolerance induction in Th cells.
Scandinavian Journal of Immunology 04/2005; 61(3):279-84. · 2.23 Impact Factor
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ABSTRACT: We here report on scleroderma renal crisis (SRC) appearing concurrently with isolated pulmonary hypertension (IPHT), that is, pulmonary hypertension without interstitial lung disease with fibrosis, in a patient with mixed connective tissue disease (MCTD) and in one with overlap syndrome or undifferentiated connective tissue disease (UCTD). To the best of our knowledge there are only five previous reports on SRC in MCTD and UCTD. The unexpected appearance of SRC in the setting of concomitant IPHT and limited or absent scleroderma skin changes is discussed.
Clinical Rheumatology 06/2002; 21(2):164-9. · 2.00 Impact Factor
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ABSTRACT: To determine the relationship between vascular function and the inflammatory response in systemic sclerosis (SSc), and to investigate whether production of endothelial-derived nitric oxide (NO) is disturbed in this disease.
We measured plasma nitrate, urinary excretion of both nitrate and cGMP, and soluble adhesion molecules of endothelial origin in patients with SSc and in age- and sex-matched controls and compared these levels between groups. Additionally, we performed correlation analysis to determine how these variables were related to one another. Plasma nitrate and 24-hour-urinary excretion of nitrate in patients and controls were measured after a 72-hour nitrate-free-diet, using a gas chromatography/mass spectrometric method. Soluble adhesion molecules intercellular adhesion molecule 1 (sICAM-1), vascular cell adhesion molecule 1 (sVCAM-1), and E-selectin and cytokines were measured by enzyme-linked immunosorbent assay. The expression of E-selectin was further investigated in skin biopsy specimens by immunoperoxidase staining, and the presence of inducible NO synthase by immunoblotting.
Plasma nitrate and 24-hour-urinary-excretion of cGMP were significantly elevated in patients compared with controls, while 24-hour-urinary-excretion of nitrate tended to be elevated in SSc patients. Levels of sICAM-1, sVCAM-1, and sE-selectin were significantly elevated in the patients. Levels of plasma nitrate in the patients correlated significantly with levels of sVCAM-1 (P = 0.020) and sE-selectin (P = 0.018) and approached a significant correlation with sICAM-1 (P = 0.055), suggesting that activated endothelial cells may produce plasma nitrate.
NO synthesis is elevated in SSc patients, and the activated endothelial cell is a likely site of its production.
Arthritis & Rheumatism 06/2000; 43(5):1085-93. · 7.87 Impact Factor
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G N Andersen
Scandinavian Journal of Rheumatology 02/1992; 21(1):46-7. · 2.47 Impact Factor
