The proton sponge hypothesis: Fable or fact?
In non-viral gene therapy, cationic polymers and lipids are frequently used to encapsulate macromolecular therapeutics into nanoparticles. During their journey to deliver the cargo to the intended intracellular target, many biological barriers need to be overcome. One of the major bottlenecks for ef...
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| Published in | European journal of pharmaceutics and biopharmaceutics Vol. 129; pp. 184 - 190 |
|---|---|
| Main Authors | , , , |
| Format | Journal Article |
| Language | English |
| Published |
Netherlands
Elsevier B.V
01.08.2018
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| Subjects | |
| Online Access | Get full text |
| ISSN | 0939-6411 1873-3441 1873-3441 |
| DOI | 10.1016/j.ejpb.2018.05.034 |
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| Abstract | In non-viral gene therapy, cationic polymers and lipids are frequently used to encapsulate macromolecular therapeutics into nanoparticles. During their journey to deliver the cargo to the intended intracellular target, many biological barriers need to be overcome. One of the major bottlenecks for efficient transfection is the endosomal barrier since nanoparticles often remain entrapped inside endosomes and are trafficked towards the lysosomes where the cargo is degraded. For cationic polymers, the proton sponge hypothesis was introduced in the late ‘90s as a way to explain their endosomal escape properties. However, to date, no consensus has been reached in the scientific community about the validity of this hypothesis due to many contradictory reports. Here we review the sometimes conflicting reports that have been published on the proton sponge hypothesis. We also discuss membrane destabilization and polymer swelling as additional factors that might influence endosomal escape of polyplexes. Based on the key publications on this subject, we aim to launch a consensus on the role of the proton sponge hypothesis in endosomal escape. |
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| AbstractList | In non-viral gene therapy, cationic polymers and lipids are frequently used to encapsulate macromolecular therapeutics into nanoparticles. During their journey to deliver the cargo to the intended intracellular target, many biological barriers need to be overcome. One of the major bottlenecks for efficient transfection is the endosomal barrier since nanoparticles often remain entrapped inside endosomes and are trafficked towards the lysosomes where the cargo is degraded. For cationic polymers, the proton sponge hypothesis was introduced in the late '90s as a way to explain their endosomal escape properties. However, to date, no consensus has been reached in the scientific community about the validity of this hypothesis due to many contradictory reports. Here we review the sometimes conflicting reports that have been published on the proton sponge hypothesis. We also discuss membrane destabilization and polymer swelling as additional factors that might influence endosomal escape of polyplexes. Based on the key publications on this subject, we aim to launch a consensus on the role of the proton sponge hypothesis in endosomal escape.In non-viral gene therapy, cationic polymers and lipids are frequently used to encapsulate macromolecular therapeutics into nanoparticles. During their journey to deliver the cargo to the intended intracellular target, many biological barriers need to be overcome. One of the major bottlenecks for efficient transfection is the endosomal barrier since nanoparticles often remain entrapped inside endosomes and are trafficked towards the lysosomes where the cargo is degraded. For cationic polymers, the proton sponge hypothesis was introduced in the late '90s as a way to explain their endosomal escape properties. However, to date, no consensus has been reached in the scientific community about the validity of this hypothesis due to many contradictory reports. Here we review the sometimes conflicting reports that have been published on the proton sponge hypothesis. We also discuss membrane destabilization and polymer swelling as additional factors that might influence endosomal escape of polyplexes. Based on the key publications on this subject, we aim to launch a consensus on the role of the proton sponge hypothesis in endosomal escape. In non-viral gene therapy, cationic polymers and lipids are frequently used to encapsulate macromolecular therapeutics into nanoparticles. During their journey to deliver the cargo to the intended intracellular target, many biological barriers need to be overcome. One of the major bottlenecks for efficient transfection is the endosomal barrier since nanoparticles often remain entrapped inside endosomes and are trafficked towards the lysosomes where the cargo is degraded. For cationic polymers, the proton sponge hypothesis was introduced in the late '90s as a way to explain their endosomal escape properties. However, to date, no consensus has been reached in the scientific community about the validity of this hypothesis due to many contradictory reports. Here we review the sometimes conflicting reports that have been published on the proton sponge hypothesis. We also discuss membrane destabilization and polymer swelling as additional factors that might influence endosomal escape of polyplexes. Based on the key publications on this subject, we aim to launch a consensus on the role of the proton sponge hypothesis in endosomal escape. |
| Author | Braeckmans, Kevin De Smedt, Stefaan C. Vermeulen, Lotte M.P. Remaut, Katrien |
| Author_xml | – sequence: 1 givenname: Lotte M.P. surname: Vermeulen fullname: Vermeulen, Lotte M.P. organization: Lab. General Biochemistry & Physical Pharmacy, Ghent University, Ottergemsesteenweg 460, 9000 Ghent, Belgium – sequence: 2 givenname: Stefaan C. surname: De Smedt fullname: De Smedt, Stefaan C. organization: Lab. General Biochemistry & Physical Pharmacy, Ghent University, Ottergemsesteenweg 460, 9000 Ghent, Belgium – sequence: 3 givenname: Katrien orcidid: 0000-0002-8653-2598 surname: Remaut fullname: Remaut, Katrien organization: Lab. General Biochemistry & Physical Pharmacy, Ghent University, Ottergemsesteenweg 460, 9000 Ghent, Belgium – sequence: 4 givenname: Kevin surname: Braeckmans fullname: Braeckmans, Kevin email: Kevin.Braeckmans@UGent.be organization: Lab. General Biochemistry & Physical Pharmacy, Ghent University, Ottergemsesteenweg 460, 9000 Ghent, Belgium |
| BackLink | https://www.ncbi.nlm.nih.gov/pubmed/29859281$$D View this record in MEDLINE/PubMed |
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| SubjectTerms | Cationic polymers Endosomal escape Nanomedicine Non-viral gene therapy Proton sponge hypothesis |
| Title | The proton sponge hypothesis: Fable or fact? |
| URI | https://dx.doi.org/10.1016/j.ejpb.2018.05.034 https://www.ncbi.nlm.nih.gov/pubmed/29859281 https://www.proquest.com/docview/2049566344 |
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