Relations between serum essential fatty acids, cytokines [Il-6 and IL-8], apoptotic marker [SFAS], and free radicals in egyptian patients with autoimmune diseases

Eicosanoids, lymphokines, free radicals and apoptotic marker are known to participate in the pathogenesis of inflammation. The aim of this study was to investigate the relations between free radical generation, interleukins [IL-6 and IL-8], apoptotic marker soluble Fas [sFas], and the level of essential fatty acids and their metabolites in patients with autoimmune diseases. The study was conducted on 37 patients admitted to Rheumatology Unit Hospital of Ain Shams University, in addition there was 10 control subjects. The patients suffered from different types of autoimmune diseases according to their criteria, Rheumatoid arthritis [RA], systemic lupus erythematosus [SLE], systemic sclerosis [SSC] and overlap syndrome. Serum levels of total glutathione [reduced; GSH and oxidized; GSSG] were estimated by HPLC; serum MDA, IL-6, IL-8 and sFas were also assayed. In addition serum fatty acids were determined by using GLC. The inflammations resulting from the studied autoimmune diseases induced significant decrease in serum level of GSH, and marked increase in the levels of GSSG, MDA, IL-6, IL-8 and sFas whereas serum fatty acid revealed that Linoleicacid [LA] and alpha linolenic acid [ALA] were significantly decreased in the studied cases. LA metabolite [arochidonic acid; AA] is markedly increase while ALA metabolite [eicosapentaenoic; EPA] and docosahexaenoic [DHA] were significantly increased. These results suggest that essential fatty acid metabolism is altered in autoimmune diseases. The interactions between essential fatty acids, eicosanoids, lymphokines and free radicals suggest that new therapeutic strategies can be devised to modify the course of these diseases

Leukotrienes and essential fatty acids patterns in children with severe protein energy malnutrition

The objective of this study is to investigate the roles of leukotrienes [LTs] and essential fatty acids [EFA] in the pathophysiology of severe protein energy malnutrition [PEM]. Plasma cysteinyl LTs [LTC[4], LTD[4], LTE[4]] and plasma EFA levels were measured by ELISA and gas liquid chromatography after plasma extraction respectively, in 40 severely malnourished children with kwashiorkor [n=20] and marasmus [n=20]. Ten well nourished children of matching age served as control. The cysteinyl LTs level was significantly higher in kwashiorkor group than in marasmic or control groups [p<0.05]. The plasma fatty acid patterns in malnourished children indicated changes characteristic of EFA deficiency, with lower linoleic acid [LA], alpha-linolenic acid [alpha LNA], arachidonic acid [AA] and docosahexaenoic acid [DHA] levels, accompanied by significantly higher oleic acid levels in both malnourished groups. The lowest values of LA and alpha-LNA were detected in marasmic group and the lowest levels of AA and DHA were in kwashiorkor group [p<0.05]. There was an inverse correlation between AA and LTs levels in children with kwashiorkor. Clinical problems associated with kwashiorkor such as hair and skin changes, edema, psychomotor alteration and hepatomegaly were significantly correlated directly with LTs and in versely with AA levels. The findings of this study suggest that cysteinyl LTs and EFA deficiency are involved in the pathophysiology of PEM particularly kwashiorkor and that severe PEM is associated with impaired FA desaturation and elongation pathways