PCSK7 and Sepsis: Several studies have reported that the serum concentrations of LPC subtypes 16:0, 18:0, 18:1, and 18:2, as well as total LPC were lower in sepsis patients compared to those in healthy controls21,24 and another recent study suggested that LPC16.0 predicts 28 day and 90-day mortality better than other LPC subtypes25.