Ready-to-Use-Type Lyophilized Lipid Nanoparticle Formulation for the Postencapsulation of Messenger RNA

Hiroki Tanaka, Shinya Hagiwara, Daiki Shirane, Takuma Yamakawa, Yuka Sato, Chika Matsumoto, Kota Ishizaki, Miho Hishinuma, Katsuyuki Chida, Kasumi Sasaki, Etsuo Yonemochi, Keisuke Ueda, Kenjirou Higashi, Kunikazu Moribe, Takashi Tadokoro, Katsumi Maenaka, Sakura Taneichi, Yuta Nakai, Kota Tange, Yu SakuraiHidetaka Akita

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)


Based on the clinical success of an in vitro transcribed mRNA (IVT-mRNA) that is encapsulated in lipid nanoparticles (mRNA-LNPs), there is a growing demand by researchers to test whether their own biological findings might be applicable for use in mRNA-based therapeutics. However, the equipment and/or know-how required for manufacturing such nanoparticles is often inaccessible. To encourage more innovation in mRNA therapeutics, a simple method for preparing mRNA-LNPs is prerequisite. In this study, we report on a method for encapsulating IVT-mRNA into LNPs by rehydrating a Ready-to-Use empty freeze-dried LNP (LNPs(RtoU)) formulation with IVT-mRNA solution followed by heating. The resulting mRNA-LNPs(RtoU) had a similar intraparticle structure compared to the mRNA-LNPs prepared by conventional microfluidic mixing. In vivo genome editing, a promising application of these types of mRNA-LNPs, was accomplished using the LNPs(RtoU) containing co-encapsulated Cas9-mRNA and a small guide RNA.

Original languageEnglish
Pages (from-to)2588-2601
Number of pages14
JournalACS Nano
Issue number3
Publication statusPublished - 2023 Feb 14


  • freeze-drying
  • gene delivery
  • gene editing
  • lipid nanoparticles
  • mRNA delivery


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