The Central Role of Proprotein Convertase Subtilisin/Kexin Type 9 in Septic Pathogen Lipid Transport and Clearance.
Level 5 - mechanism / opinion, no new human data
Narrative review and mechanistic framework paper without primary empirical human data.
PubMed 26252194 · doi:10.1164/rccm.201505-0876CI
What was done
This narrative review describes the biological pathways involved in sequestering and clearing microbial cell wall lipids (including LPS, lipoteichoic acid, and phospholipomannan) from the circulation during sepsis via transfer proteins, lipoproteins, and hepatic receptors.
What was found
The abstract reports no empirical numbers or quantitative findings. It outlines the mechanism whereby reduced PCSK9 activity increases hepatic LDL receptor recycling, accelerating the clearance and biliary excretion of pathogen lipids transported in LDL particles, which is proposed to decrease systemic inflammation in sepsis.
Why it matters
This framework highlights PCSK9 inhibition as a potential therapeutic strategy to reduce septic inflammation by enhancing the host clearance of circulating microbial lipids.
Limits
The abstract presents narrative mechanism-based reasoning with no primary clinical or experimental dataset, reported sample sizes, or quantitative outcome measures.
Cited by
- supports LPS binds to LDL and VLDL particles via lipid interactions and binds specifically to the apoB protein.
- contradicts When LPS binds to the apoB protein on small dense LDL particles, hepatic LDL receptor recognition is obscured, preventing normal liver clearance and causing arterial wall entrapment and foam cell formation by macrophages.