Læknaneminn


Læknaneminn - 01.04.1996, Side 59

Læknaneminn - 01.04.1996, Side 59
Pættir úr meingerð iktsýki ar með hækkun á IgA RF fá iktsýki en aðrir kenni sér aldrei neins meins. LOKAORÐ Eins og fram hefur komið getur iktsýki verið mjög misjafnlega alvarlegur sjúkdómur. Sjúklingar með hækkun á IgA RF snemma á sjúkdómsferlin- um fá að jafnaði slæman sjúkdóm og meiri lið- skemmdir en þeir sem ekki hafa hækkun á þessum gigtarþætti. Enn á þó eftir að gera framsýnar sam- anburðarrannsóknir til að kanna hvort hægt er að bæta horfur IgA RF jákvæðra sjúklinga með sterk- ari lyfjameðferð í upphafi sjúkdóms. Rannsóknir hafa einnig sýnt að eitilfrumusam- setning sjúklinga með slæma iktsýki og hækkun á IgA RF er önnur en þeirra sem eru IgA RF nei- kvæðir. Þetta getur bent til þess að meingerð IgA RF-jákvæðrar iktsýki sé önnur en IgA RF neikvæða sjúkdómsins. Þannig má leiða líkur að því að ikt- sýki sé ekki einn sjúkdómur, heldur að minnsta kosti tveir eða þrír sjúkdómar. Frekari rannsókna er þörf til að kanna þá tilgátu. HEIMILDIR 1. Spector TD. Rheumatoid arthritis. Rheum Dis Clin NorthAm 1990;16:513-537. 2. Gordon DA, Stein JL, Broder I. The extra-articular feat- ures of rheumatoid arthritis. A systemic analysis of 127 cases. Am J Med 1973; 54: 445-452. 3. Jónsson T, Arinbjarnarson S, Thorsteinsson J, Steinsson K, Geirsson ÁJ, Jónsson H, Valdimarsson H. Raised IgA rheumatoid factor (RF) but not IgM RF or IgG RF is associated with extra-articular manifestations in rheuma- toid arthritis. Scand J Rheumatol 1995; 24: 372-375. 4. Rheumatology and immunology, 2nd edition, 1986. pp. 196-214. Editors: Cohen AS, Bennett JC. Grune & Stratton, London, UK. 5. Pincus T. Rheumatoid arthritis : A medical emergency. Scand J Rheumatol 1994; 14 (suppl. 100): 21-30. 6. Egeland T, Munthe M. Rheumatoid factor. Clin Rheum Dis 1983; 9: 135-160. 7. Ropes MW, Bennett GA, Cobb S, Jacox R, Jessar RA. 1958 Revision of diagnostic criteria for rheumatoid art- hritis. Arthritis Rheum 1959; 2: 16-20. 8. Arnett FC, Edworthy SM, Bloch DA, McShane DJ, Fries JF, Cooper NS, et al. The American Rheumatism Associ- ation 1987 revised criteria for the classification of rheuma- toid arthritis. Arthritis Rheum 1988; 31: 315-324. 9. Jónsson T, Thorsteinsson J, Kolbeinsson A, Jónasdóttir E, Sigfússon N, Valdimarsson H. Population study on the importance of rheumatoid factor isotypes in adults. Ann Rheum Dis 1992; 51: 863-868. 10. Mikkelsen WM, Dodge HJ, Duff IF, Kato H. Estimates on the prevalence of rheumatic diseases in the population ofTecuseh, Michigan 1959-60. J Chron Dis 1967; 20: 351-369. 11. Thorsteinsson J, Björnsson OJ, Kolbeinsson A, Allander E, Ólafsson Ó. A population study of rheumatoid factor in Iceland. A five year follow-up of 50 women with rheumatoid factor. Ann Clin Res 1975; 7: 183-194. 12. Barnett EV, Winkelstein A, Weinberger HJ. Agammaglobulinemia with polyarthritis and subcuta- neous noduli. Am J Med 1970; 48: 40-47. 13. Grayzel AL, Marcus R, Stern R, Winchester RJ. Cronic polyarthritis associated with hypogammaglobulinemia. A study of rwo patients. Arthritis Rheum 1977; 20: 887- 894. 14. Feigenbaum SL, Masi AT, Kaplan SB. Prognosis in rheumatoid arthritis. A longitudinal study of newly di- agnosed younger adult patients. Am J Med 1979; 66: 377-384. 15. Jacoby RKJayson MIV, Cosh JA. Onset, early stages, and prognosis of rheumatoid arthritis: A clinical study of 100 patients with 11-year follow-up. BMJ 1973;2:96-100. 16. Waaler E. On the occurrence of a factor in human serum activating the specific agglutination of sheep blood cor- puscles. Acta Pathol Microbiol Scand 1940;17:172-188. 17. Singer JM, Plotz CM. The latex fixation test. I. App- lication to the serologic diagnosis of rheumatoid arthritis. AmJMed 1956;21:888-892. 18. Teitsson I, Withrington RH, Seifert MH, Valdimarsson H. Prospective study of early rheumatoid arthritis. I. Prognostic value of IgA rheumatoid factor. Ann Rheum Dis 1984; 43: 673-678. 19. Jónsson T, Valdimarsson H. Clinical significance of rheumatoid factor isotypes in seropositive arthritis. Rheumatollnt 1992;12:111-113. 20. Jónsson T, Valdimarsson H. Combined elevation of IgM and IgA rheumatoid factor discriminates rheumatoid art- hritis from other rheumatic diseases. Hluti doktorsrit- gerðarinnar ‘Studies on the clinical significance of rheumatoid factor isotypes’ , Reykjavík, 1993. 21. Houssien DA, Jónsson T, Scott DL. Association between rheumatoid factor isotypes and radiological progression. Handrit í vinnslu. 22. Le Gros G, Erard F. Non-cytotoxic IL-4, IL-5, IL-10 producing CD8+ T-cells: their activation and effector functions. Curr Opin Immunol 1994; 6: 453-457. 23. Sohen S, Romain PL, Rothstein DM, Yamane T, Tanaka LÆKNANEMINN 51 1. tbl. 1996, 49. árg.
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