Branching Ionizable Lipids Can Enhance the Stability, Fusogenicity, and Functional Delivery of mRNA

Ionizable lipids with branched tails have been used in lipid nanoparticles (LNPs)‐based messenger RNA (mRNA) therapeutics like COVID‐19 vaccines. However, due to the limited commercial availability of branched ingredients, a systematic analysis of how the branched tails affect LNP quality has been l...

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Main Authors: Kazuki Hashiba, Yusuke Sato, Masamitsu Taguchi, Sachiko Sakamoto, Ayaka Otsu, Yoshiki Maeda, Takuya Shishido, Masao Murakawa, Arimichi Okazaki, Hideyoshi Harashima
Format: Article
Language:English
Published: Wiley-VCH 2023-01-01
Series:Small Science
Subjects:
Online Access:https://doi.org/10.1002/smsc.202200071
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author Kazuki Hashiba
Yusuke Sato
Masamitsu Taguchi
Sachiko Sakamoto
Ayaka Otsu
Yoshiki Maeda
Takuya Shishido
Masao Murakawa
Arimichi Okazaki
Hideyoshi Harashima
author_facet Kazuki Hashiba
Yusuke Sato
Masamitsu Taguchi
Sachiko Sakamoto
Ayaka Otsu
Yoshiki Maeda
Takuya Shishido
Masao Murakawa
Arimichi Okazaki
Hideyoshi Harashima
author_sort Kazuki Hashiba
collection DOAJ
description Ionizable lipids with branched tails have been used in lipid nanoparticles (LNPs)‐based messenger RNA (mRNA) therapeutics like COVID‐19 vaccines. However, due to the limited commercial availability of branched ingredients, a systematic analysis of how the branched tails affect LNP quality has been lacking to date. Herein, α‐branched tail lipids are focused, as they can be synthesized from simple commercially available chemicals, and the length of each chain can be independently controlled. Furthermore, symmetry and total carbon number can be used to describe α‐branched tails, facilitating the design of a systematic lipid library to elucidate “structure–property–function” relationships. Consequently, a lipid library is developed containing 32 different types of α‐branched tails. This library is used to demonstrate that branched chains increase LNP microviscosity and headgroup ionization ability in an acidic environment, which in turn enhances the stability and in vivo efficacy of mRNA‐LNPs. Of the branched lipids, CL4F 8‐6 LNPs carrying Cas9 mRNA and sgRNA could achieve 54% genome editing and 77% protein reduction with a single dose of 2.5 mg kg−1. This mechanism‐based data on branched lipids is expected to provide insights into rational lipid design and effective gene therapy in the future.
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spelling doaj.art-a594fba2898d4a84917d111dc21355f32023-01-10T14:09:41ZengWiley-VCHSmall Science2688-40462023-01-0131n/an/a10.1002/smsc.202200071Branching Ionizable Lipids Can Enhance the Stability, Fusogenicity, and Functional Delivery of mRNAKazuki Hashiba0Yusuke Sato1Masamitsu Taguchi2Sachiko Sakamoto3Ayaka Otsu4Yoshiki Maeda5Takuya Shishido6Masao Murakawa7Arimichi Okazaki8Hideyoshi Harashima9Nucleic Acid Medicine Business Division Nitto Denko Corporation 1-1-2, Shimohozumi Ibaraki Osaka 567-8680 JapanLaboratory for Molecular Design of Pharmaceutics, Faculty of Pharmaceutical Sciences Hokkaido University Kita-12, Nishi-6 Kita-Ku Sapporo 060-0812 JapanNucleic Acid Medicine Business Division Nitto Denko Corporation 1-1-2, Shimohozumi Ibaraki Osaka 567-8680 JapanNucleic Acid Medicine Business Division Nitto Denko Corporation 1-1-2, Shimohozumi Ibaraki Osaka 567-8680 JapanNucleic Acid Medicine Business Division Nitto Denko Corporation 1-1-2, Shimohozumi Ibaraki Osaka 567-8680 JapanNucleic Acid Medicine Business Division Nitto Denko Corporation 1-1-2, Shimohozumi Ibaraki Osaka 567-8680 JapanNucleic Acid Medicine Business Division Nitto Denko Corporation 1-1-2, Shimohozumi Ibaraki Osaka 567-8680 JapanNucleic Acid Medicine Business Division Nitto Denko Corporation 1-1-2, Shimohozumi Ibaraki Osaka 567-8680 JapanNucleic Acid Medicine Business Division Nitto Denko Corporation 1-1-2, Shimohozumi Ibaraki Osaka 567-8680 JapanLaboratory for Molecular Design of Pharmaceutics, Faculty of Pharmaceutical Sciences Hokkaido University Kita-12, Nishi-6 Kita-Ku Sapporo 060-0812 JapanIonizable lipids with branched tails have been used in lipid nanoparticles (LNPs)‐based messenger RNA (mRNA) therapeutics like COVID‐19 vaccines. However, due to the limited commercial availability of branched ingredients, a systematic analysis of how the branched tails affect LNP quality has been lacking to date. Herein, α‐branched tail lipids are focused, as they can be synthesized from simple commercially available chemicals, and the length of each chain can be independently controlled. Furthermore, symmetry and total carbon number can be used to describe α‐branched tails, facilitating the design of a systematic lipid library to elucidate “structure–property–function” relationships. Consequently, a lipid library is developed containing 32 different types of α‐branched tails. This library is used to demonstrate that branched chains increase LNP microviscosity and headgroup ionization ability in an acidic environment, which in turn enhances the stability and in vivo efficacy of mRNA‐LNPs. Of the branched lipids, CL4F 8‐6 LNPs carrying Cas9 mRNA and sgRNA could achieve 54% genome editing and 77% protein reduction with a single dose of 2.5 mg kg−1. This mechanism‐based data on branched lipids is expected to provide insights into rational lipid design and effective gene therapy in the future.https://doi.org/10.1002/smsc.202200071branched tailgenome editingionizable lipidslipid nanoparticlesmRNA
spellingShingle Kazuki Hashiba
Yusuke Sato
Masamitsu Taguchi
Sachiko Sakamoto
Ayaka Otsu
Yoshiki Maeda
Takuya Shishido
Masao Murakawa
Arimichi Okazaki
Hideyoshi Harashima
Branching Ionizable Lipids Can Enhance the Stability, Fusogenicity, and Functional Delivery of mRNA
Small Science
branched tail
genome editing
ionizable lipids
lipid nanoparticles
mRNA
title Branching Ionizable Lipids Can Enhance the Stability, Fusogenicity, and Functional Delivery of mRNA
title_full Branching Ionizable Lipids Can Enhance the Stability, Fusogenicity, and Functional Delivery of mRNA
title_fullStr Branching Ionizable Lipids Can Enhance the Stability, Fusogenicity, and Functional Delivery of mRNA
title_full_unstemmed Branching Ionizable Lipids Can Enhance the Stability, Fusogenicity, and Functional Delivery of mRNA
title_short Branching Ionizable Lipids Can Enhance the Stability, Fusogenicity, and Functional Delivery of mRNA
title_sort branching ionizable lipids can enhance the stability fusogenicity and functional delivery of mrna
topic branched tail
genome editing
ionizable lipids
lipid nanoparticles
mRNA
url https://doi.org/10.1002/smsc.202200071
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