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Sequestration of Lipophilic Toxins (Lipid Sink)

Molecular classification: Physicochemical Process, Drug Disposition, Pharmacokinetic Process

Overview

The "lipid sink" refers to a pharmacological and toxicological mechanism in which lipophilic (fat-soluble) toxins are sequestered or partitioned into an administered lipid phase, typically via intravenous lipid emulsion (ILE) therapy. This process reduces the bioavailability of these toxins at their sites of action, thereby mitigating their toxic effects. The sequestration ("lipid sink") mechanism exploits physicochemical properties of both administered therapeutic emulsions and endogenous body compartments to trap harmful fat-soluble substances. This approach underpins modern antidotal strategies against several classes of drug intoxication where conventional therapies may fail.

Other names: Lipid SinkIntravenous Lipid Emulsion TherapyLipid Emulsion RescueLipid Sequestration

Mechanism of action

Partitioning of lipophilic toxins into an administered lipid phase, reducing their concentration at target tissues.

Biological functions

Toxin sequestrationDrug detoxificationReduction of drug bioavailabilityRedistribution of lipophilic substances

Disease associations

Drug overdoseToxicologyLocal anesthetic systemic toxicity (LAST)

Safety considerations

Potential for fat overload syndromeAcute lung injuryPancreatitisInterference with laboratory assays

Interacting drugs

Intravenous Lipid Emulsion (ILE)

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