Strong increase of 9-hydroxy-10,12-octadecadienoic acid in low density lipoprotein after a hemorrhagic shock.

9-hydroxy-10,12-octadecadienoic acid (9-HODE) is generated by lipid peroxidation (LPO) processes in comparison to other marker compounds in at least 10 fold amount. A 10-25 fold increase of this new marker compound in relation to age matched healthy individuals was observed in the low density lipoprotein (LDL) fraction of ten patients suffering from a hemorrhagic shock. The 9-HODE values dropped to normal levels after recovery. Similarly the 9-HODE content in LDL of patients which had to undergo orthopedic surgery--replacement of their arthritic hip joints by endoprosthesis--were investigated. The rather high HODE values dropped also after recovery reflecting obviously the disappearance of inflammatory processes associated with arthritis.