Evidence map›Paper›PMID 40681859›Full record

ArticleNature biomedical engineering2025

Mannich reaction-based combinatorial libraries identify antioxidant ionizable lipids for mRNA delivery with reduced immunogenicity.

Ningqiang Gong, Dongyoon Kim, Mohamad-Gabriel Alameh, Rakan El-Mayta, Emily L Han, Garima Dwivedi, Rohan Palanki, Qiangqiang Shi, Xuexiang Han, Lulu Xue and 7 more

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In one paragraph

Article in Nature biomedical engineering, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 9 papers.

0numbers the graph read from it
0cells of the map it votes in
9citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

9 citing papers in PubMed.

  1. Review
  2. Review
  3. Bioactive lipid-derived nanoparticles for RNA delivery.Materials today (Kidlington, England) · 2026
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  5. Article
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  7. Review
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

17 authors.

Ningqiang Gong *Department of Bioengineering, University of Pennsylvania, Philadelphia, PA, USA.ORCID http://orcid.org/0000-0002-9444-8505
Dongyoon Kim *Department of Bioengineering, University of Pennsylvania, Philadelphia, PA, USA.
Mohamad-Gabriel AlamehDepartment of Medicine, University of Pennsylvania, Philadelphia, PA, USA.ORCID http://orcid.org/0000-0002-5672-6930
Rakan El-MaytaDepartment of Medicine, University of Pennsylvania, Philadelphia, PA, USA.ORCID http://orcid.org/0000-0002-5855-233X
Emily L HanDepartment of Bioengineering, University of Pennsylvania, Philadelphia, PA, USA.ORCID http://orcid.org/0009-0008-6276-7502
Garima DwivediDepartment of Medicine, University of Pennsylvania, Philadelphia, PA, USA.
Rohan PalankiDepartment of Bioengineering, University of Pennsylvania, Philadelphia, PA, USA.
Qiangqiang ShiDepartment of Bioengineering, University of Pennsylvania, Philadelphia, PA, USA.
Xuexiang HanDepartment of Bioengineering, University of Pennsylvania, Philadelphia, PA, USA.ORCID http://orcid.org/0000-0003-0011-5222
Lulu XueDepartment of Bioengineering, University of Pennsylvania, Philadelphia, PA, USA.ORCID http://orcid.org/0000-0001-5719-1336
Junchao XuDepartment of Bioengineering, University of Pennsylvania, Philadelphia, PA, USA.ORCID http://orcid.org/0000-0003-0725-8111
Zilin MengDepartment of General Surgery, The First Affiliated Hospital of USTC, Division of Life Science and Medicine, University of Science and Technology of China, Hefei, China.
Tianyu LuoDepartment of General Surgery, The First Affiliated Hospital of USTC, Division of Life Science and Medicine, University of Science and Technology of China, Hefei, China.
Christian G Figueroa-EspadaDepartment of Bioengineering, University of Pennsylvania, Philadelphia, PA, USA.ORCID http://orcid.org/0000-0003-2700-7678
Drew WeissmanDepartment of Medicine, University of Pennsylvania, Philadelphia, PA, USA.ORCID http://orcid.org/0000-0002-1501-6510
Jinghong LiDepartment of Chemistry, Tsinghua University, Beijing, China.ORCID http://orcid.org/0000-0002-0750-7352
Michael J MitchellDepartment of Bioengineering, University of Pennsylvania, Philadelphia, PA, USA. mjmitch@seas.upenn.edu.ORCID http://orcid.org/0000-0002-3628-2244

Funding

Engineering Biomaterials to Modulate the Bone Marrow Microenvironment in Multiple MyelomaF99CA284294 · NCI · UNIVERSITY OF PENNSYLVANIA · PI FIGUEROA-ESPADA, CHRISTIAN GABRIEL · 2023 to 2024
$98k
NCI NIH HHS F99 CA284294
6 · The paper itself

Abstract

The immunogenicity of lipid nanoparticles (LNPs) used for the delivery of nucleoside-modified messenger RNA limits the levels and durability of expression of the encoded protein. Here, by leveraging the Mannich reaction for ionizable lipid synthesis, and via the in vitro and in vivo screening of six combinatorial libraries of synthesized lipids, we report the identification of an antioxidant ionizable lipid, C-a16, exhibiting reduced immunogenicity. When incorporated into LNPs for mRNA delivery, C-a16 mitigated the generation of intracellular reactive oxygen species, thereby extending the duration of protein expression. In mice, and compared with commercial LNPs, LNPs incorporating C-a16 and co-delivering Cas9 mRNA and guide RNA for the editing of the transthyretin gene led to 2.8-fold higher editing efficiency; LNPs with C-a16 delivering fibroblast growth factor 21 mRNA increased the expression of the protein 3.6-fold; and when delivering mRNA encoding a tumour neoantigen or the spike protein of SARS-CoV-2, LNPs with C-a16 induced stronger antigen-specific immune responses. Our findings support the further testing of C-a16 as a promising ionizable lipid for mRNA delivery in therapeutic applications.

Indexed as

AntioxidantsLipidsRNA, MessengerAnimalsCombinatorial Chemistry TechniquesCOVID-19FemaleGene EditingGene Transfer TechniquesHumansLiposomesMiceNanoparticlesReactive Oxygen SpeciesSARS-CoV-2Spike Glycoprotein, CoronavirusAntioxidantsLipid NanoparticlesLipidsLiposomesReactive Oxygen SpeciesRNA, MessengerSpike Glycoprotein, Coronavirusspike protein, SARS-CoV-2

Identifiers

What OpenQuestion holds

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Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.