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Enzyme-Responsive Liposomes for the Delivery of Anticancer Drugs

Farnaz Fouladi1, Kristine J Steffen1, Sanku Mallik1

  • 1Department of Pharmaceutical Sciences, North Dakota State University , Fargo, North Dakota 58108, United States.

Bioconjugate Chemistry
|February 17, 2017
PubMed

Insights

Enzyme-responsive liposomes are advanced nanocarriers that precisely release therapeutic payloads at disease sites. This targeted delivery enhances drug efficacy and minimizes side effects in healthy tissues.

Area of Science:

  • Nanotechnology
  • Biomedical Engineering
  • Drug Delivery Systems

Background:

  • Liposomes are versatile nanocarriers for targeted drug delivery, improving therapeutic outcomes by concentrating drugs at diseased sites and reducing toxicity in healthy tissues.
  • Conventional targeting strategies include ligand-targeted and stimuli-responsive liposomes.
  • Stimuli-responsive liposomes release their cargo only when exposed to specific endogenous or exogenous stimuli.

Purpose of the Study:

  • This review focuses on enzyme-responsive liposomes, a specific type of stimuli-responsive nanocarrier.
  • The review elucidates the mechanisms by which enzyme-responsive liposomes release their encapsulated payloads.

Main Methods:

  • The review analyzes various destabilization mechanisms employed by enzyme-responsive liposomes.
  • Mechanisms discussed include structural perturbation of the lipid bilayer, removal of surface shielding polymers, cleavage of incorporated lipopeptides or lipopolymers, and prodrug activation within the liposomes.

Main Results:

  • Enzyme-responsive liposomes offer precise control over drug release, triggered by elevated enzyme levels at pathological sites.
  • Specific mechanisms facilitate controlled cargo release, including lipid bilayer destabilization and surface modification leading to enhanced cellular uptake.
  • Cleavage of specific molecular linkers and enzyme-mediated prodrug activation represent further strategies for targeted payload release.

Conclusions:

  • Enzyme-responsive liposomes represent a sophisticated drug delivery platform for targeted therapy.
  • Their ability to respond to enzymatic triggers offers enhanced precision in drug release at disease sites.
  • These nanocarriers hold significant potential for improving treatment efficacy and reducing systemic toxicity in various therapeutic applications.

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