Oral Gavage of Ginger Nanoparticle-Derived Lipid Vectors Carrying Dmt1 siRNA Blunts Iron Loading in Murine Hereditary Hemochromatosis
Open accessAbstract
Nanoparticles (NPs) have been utilized to deliver drugs to the intestinal epithelium in vivo . Moreover, NPs derived from edible plants are less toxic than synthetic NPs. Here, we utilized ginger NP-derived lipid vectors (GDLVs) in a proof-of-concept investigation to test the hypothesis that inhibiting expression of divalent metal-ion transporter 1 (Dmt1) would attenuate iron loading in a mouse model of hereditary hemochromatosis (HH). Initial experiments using duodenal epithelial organ cultures from intestine-specific Dmt1 knockout (KO) (Dmt1 int/int ) mice in the Ussing chamber established that Dmt1 is the only active iron importer during iron-deficiency anemia. Further, when Dmt1 int/int mice were crossed with mice lacking the iron-regulatory hormone, hepcidin (Hepc −/− ), iron loading was abolished. Hence, intestinal Dmt1 is required for the excessive iron absorption that typifies HH. Additional experiments established a protocol to produce GDLVs carrying functional Dmt1 small interfering RNAs (siRNAs) and to target these gene delivery vehicles to the duodenal epithelium in vivo (by incorporating folic acid [FA]). When FA-GDLVs carrying Dmt1 siRNA were administered to weanling Hepc −/− mice for 16 days, intestinal Dmt1 mRNA expression was attenuated and tissue iron accumulation was blunted. Oral delivery of functional siRNAs by FA-GDLVs is a suitable therapeutic approach to mitigate iron loading in murine HH.
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Short interfering RNA against DMT1, administered in nanoparticles to target intestinal absorption, established a proof of principle of reducing dietary iron uptake.
“Short interfering RNA against DMT1, administered in nanoparticles to target intestinal absorption,127 established a proof of principle of reducing dietary iron uptake.”
From Iron metabolism and iron disorders revisited in the hepcidin era (2020) · cites this paper as [127]
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- Authors
- Wang, X., Zhang, M., Flores, S. R. L., Woloshun, R. R., Yang, C., Yin, L., Xiang, P., Xu, X., Garrick, M. D., Vidyasagar, S., Merlin, D., & Collins, J. F.
- Affiliations
- University of Florida (US)
- Georgia State University (US)
- University of Florida Health (US)
- University at Buffalo, State University of New York (US)
- Corresponding author
- Collins, James F.
- ORCID
- Venue
- Molecular Therapy
- Publisher
- Elsevier BV
- Published
- 2019-03
- Volume
- 27
- Issue
- 3
- Pages
- 493-506
- ISSN
- 1525-0016 (ISSN-L)
- PMC
- PMC6401192
- OpenAlex
- W2908589438
- Cited by
- 99
- References
- 62
- Citations by year
- 2026: 13 · 2025: 15 · 2024: 21 · 2023: 19 · 2022: 8 · 2021: 13 · 2020: 6 · 2019: 4
- FWCI
- 2.65
- Type
- journal article
- Language
- en
- Open access
- hybrid
- doi.org
- Licence
- Locations
- Molecular Therapy (publishedVersion, cc-by-nc-nd)
- Europe PMC (PubMed Central) (publishedVersion, cc-by-nc-nd)
- PubMed Central (publishedVersion, cc-by-nc-nd)
- PubMed (publishedVersion)
- Funders
- National Institute of Diabetes and Digestive and Kidney Diseases (R01 DK109717)
- NIDDK
- Office of Dietary Supplements
- China Scholarship Council
- Crohn's & Colitis Foundation of America
- Department of Veteran Affairs
- Topics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA Interference and Gene Delivery
- Health Sciences › Medicine › Hematology › Iron Metabolism and Disorders
- Physical Sciences › Materials Science › Biomaterials › Nanoparticle-Based Drug Delivery
- Keywords
- hereditary hemochromatosis, DMT1, siRNA delivery, oral gene delivery, iron overload, hepcidin, intestinal iron absorption, duodenal epithelium, folic acid targeting, iron deficiency anemia
- MeSH terms
- Animals, Female, Hemochromatosis, Humans, Iron, Male, Mice, Inbred C57BL, Transcription Factors, Mice, Knockout, Iron, Dietary, Zingiber officinale, RNA, Small Interfering, Mice, Nanoparticles, HEK293 Cells, Real-Time Polymerase Chain Reaction, Hepcidins
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