Highly Water-Soluble Cucurbit[8]uril Derivative as a Broad-Spectrum Neuromuscular Block Reversal Agent

Area of Science:

• Supramolecular Chemistry
• Anesthesiology
• Pharmacology

Background:

• Residual neuromuscular blockade is a significant clinical concern.
• Effective reversal agents are crucial for patient safety during anesthesia.
• Existing agents have limitations in spectrum or side effects.

Purpose of the Study:

• To develop a broad-spectrum neuromuscular block reversal agent.
• To investigate a cucurbit[8]uril (CB[8]) derivative for reversing neuromuscular blockade.
• To evaluate the efficacy and safety of the novel CB[8] derivative.

Main Methods:

• Synthesis of a highly water-soluble cucurbit[8]uril (CB[8]) derivative.
• UV/Vis competition titration assays to determine binding affinity.
• In vivo studies in animal models to assess reversal efficacy and recovery time.
• Acute toxicity evaluations to determine biocompatibility and maximum tolerance dose.

Main Results:

• The CB[8] derivative demonstrated high binding affinity (10^7 M^-1) for both benzylisquinolinium and aminosteroid neuromuscular blocking agents.
• In vivo studies showed significantly accelerated recovery times compared to placebo and neostigmine.
• Reversal activity was comparable to or exceeded that of sugammadex.
• The CB[8] derivative exhibited excellent biocompatibility with a high maximum tolerance dose (960 mg kg^-1).

Conclusions:

• The developed CB[8] derivative is a potent, broad-spectrum neuromuscular block reversal agent.
• Its supramolecular sequestration strategy offers effective reversal for diverse neuromuscular blocking agents.
• The agent demonstrates favorable efficacy and safety profiles, comparable to current clinical standards.