PMID- 8415805 OWN - NLM STAT- MEDLINE DCOM- 19931123 LR - 20190914 IS - 0952-3278 (Print) IS - 0952-3278 (Linking) VI - 49 IP - 2 DP - 1993 Aug TI - Dietary fish oil supplementation alters LTB4:LTB5 ratios but does not affect the expression of acute graft versus host disease in mice. PG - 561-8 AB - One of the mechanisms by which corticosteroids may modify acute graft vs host disease (GvHD) is via inhibition of arachidonic acid (AA) metabolism. Leukotriene B4 (LTB4) is a product of that pathway which may take part in the pathogenesis of GvHD through the stimulation of T-lymphopoiesis and T-lymphocyte activation. LTB4 is a metabolite of AA (20:4n-6). Alternate dietary sources of polyunsaturated fatty acids (PUFA), specifically eicosapenteinoic acid (20:5n-3) (EPA) and docosahexaenoic acid (22:6n-3) (DHA), shift the LTs formed with a decrease in LTB4 an increase in LTB5. LTB5 is a less potent agonist than LTB4 and this results in a theoretical decrease of LTB4 mediated events. Supplementation of in vitro bone marrow cultures with EPA or DHA had no detrimental effect on myeloid colony formation. Dietary EPA/DHA supplementation in mice with induced GvHD appeared to be safe and well tolerated. The LTB4:LTB5 ratio shifted from 7.65 +/- 1.75 in control-fed animals to 1.03 +/- 0.18. Fish-oil-supplementation did not compromise engraftment or stem cell content. Alone, this therapy was unable to modify GvHD. FAU - Miller, A M AU - Miller AM AD - Division of Medical Oncology, College of Medicine, University of Florida, Gainesville 32610-0277. FAU - van Bekkum, D W AU - van Bekkum DW FAU - Kobb, S M AU - Kobb SM FAU - McCrohan, M B AU - McCrohan MB FAU - Knaan-Shanzer, S AU - Knaan-Shanzer S LA - eng PT - Journal Article PL - Scotland TA - Prostaglandins Leukot Essent Fatty Acids JT - Prostaglandins, leukotrienes, and essential fatty acids JID - 8802730 RN - 0 (Fish Oils) RN - 1HGW4DR56D (Leukotriene B4) RN - 25167-62-8 (Docosahexaenoic Acids) RN - 27YG812J1I (Arachidonic Acid) RN - 83869-56-1 (Granulocyte-Macrophage Colony-Stimulating Factor) RN - AAN7QOV9EA (Eicosapentaenoic Acid) RN - EC 1.13.11.12 (Lipoxygenase) SB - IM MH - Animals MH - Arachidonic Acid/pharmacology MH - Bone Marrow/drug effects MH - Disease Models, Animal MH - Docosahexaenoic Acids/pharmacology MH - Eicosapentaenoic Acid/pharmacology MH - Fish Oils/*pharmacology/therapeutic use MH - Graft vs Host Disease/*diet therapy/*immunology/metabolism MH - Granulocyte-Macrophage Colony-Stimulating Factor/drug effects MH - Humans MH - In Vitro Techniques MH - Leukotriene B4/*metabolism MH - Lipoxygenase/metabolism MH - Mice MH - Mice, Inbred C57BL MH - Mice, Inbred CBA MH - Spleen/drug effects MH - T-Lymphocytes/drug effects EDAT- 1993/08/01 00:00 MHDA- 1993/08/01 00:01 CRDT- 1993/08/01 00:00 PHST- 1993/08/01 00:00 [pubmed] PHST- 1993/08/01 00:01 [medline] PHST- 1993/08/01 00:00 [entrez] AID - 10.1016/0952-3278(93)90161-o [doi] PST - ppublish SO - Prostaglandins Leukot Essent Fatty Acids. 1993 Aug;49(2):561-8. doi: 10.1016/0952-3278(93)90161-o.