Question explored with the scientific record
Do the LNPs get taken up by bacteria in the gut
The short version: the evidence retrieved does not contain a single study that tests whether lipid nanoparticles (LNPs) are taken up by gut bacteria.
The retrieved studies are about using LNPs to deliver drugs through the gut to the human bloodstream, not about what happens to the LNPs themselves once they encounter the microbiome. One study shows that solid lipid nanoparticles can survive the stomach and release drug in the intestine [16], and another shows that lipid nanoemulsions are absorbed into the lymphatic system after oral dosing [10]. But neither looked at whether the nanoparticle shell binds to or enters bacterial cells. A separate study on gold nanoparticles found that particles around 100 nm can physically stretch and rupture bacterial membranes [24], but that was gold, not lipid, and the mechanism depends on the particle being rigid and non-deformable. LNPs are soft, deformable, and designed to fuse with human cell membranes, not bacterial ones.
The evidence does not answer the question. No study in the set tracked LNP association with gut bacteria, measured bacterial uptake, or tested whether the mRNA or lipid components could be transferred to the microbiome. The gap itself matters: if LNPs can survive the gut long enough to deliver drug to human tissues, they could also interact with the trillion bacteria living there, and nobody has checked.
My call: the evidence retrieved does not address whether LNPs are taken up by gut bacteria. Confidence: not clear. The question remains unstudied.
Sources examined 26
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A Review article on Lipid nanoparticles for targeting Anti - Tumor Drugs
This is a comprehensive review of lipid-based nanoparticle platforms (including solid lipid nanoparticles, nanostructured lipid carriers, liposomes, nanodiscs, and hybrids) for targeted anti-tumor drug delivery, detailing their fabrication, properties, targeting strategies, ther…
DOI: 10.71097/ijsat.v16.i2.4978 -
Development and evaluation of lipid nanoparticles for camptothecin delivery: a comparison of solid lipid nanoparticles, nanostructured lipid carriers, and lipid emulsion
This study develops and evaluates lipid nanoparticles for the delivery of camptothecin, demonstrating that solid lipid nanoparticles (SLN-P) exhibit superior cytotoxicity against melanoma cells compared to other formulations, while also ensuring sustained drug release and low he…
DOI: 10.1111/j.1745-7254.2008.00829.x -
Solid lipid nanoparticle and nanoparticle lipid carrier for controlled drug delivery – a review of state of art and recent advances
This review discusses the advancements and current state of solid lipid nanoparticles (SLNs) and nanoparticle lipid carriers for controlled drug delivery, highlighting their production techniques, drug incorporation, release mechanisms, and potential applications in pharmaceutic…
DOI: 10.1504/ijnp.2010.033220 -
Development of Emerin mRNA Lipid Nanoparticles to Rescue Myogenic Differentiation
This study demonstrates that lipid nanoparticles encapsulating human emerin mRNA (EMD-LNPs) can efficiently deliver emerin to emerin-null H2K myogenic progenitors, produce robust emerin expression with minimal toxicity, and rescue myogenic differentiation, suggesting a potential…
DOI: 10.3390/ijms26167774 -
Lipid nanoparticles as vehicles for topical psoralen delivery: Solid lipid nanoparticles (SLN) versus nanostructured lipid carriers (NLC)
This study compares solid lipid nanoparticles (SLN) and nanostructured lipid carriers (NLC) for the topical delivery of psoralen derivatives, demonstrating that NLC enhances skin permeation and controlled release compared to SLN.
DOI: 10.1016/j.ejpb.2008.05.008 -
Biodistribution and Metabolism Studies of Lipid Nanoparticle–Formulated Internally [3H]-Labeled siRNA in Mice
This study investigates the absorption, distribution, metabolism, and excretion (ADME) properties of lipid nanoparticle-formulated [3H]-labeled siRNA in male CD-1 mice, demonstrating that the lipid nanoparticle vehicle significantly enhances the pharmacokinetics and biodistribut…
DOI: 10.1124/dmd.113.055434 -
Analytical characterization of liposomes and other lipid nanoparticles for drug delivery
An analytical-focused review that surveys strategies for characterizing liposomes and lipid nanoparticles (LNPs) for drug delivery, detailing identification/quantification of lipid species and APIs, encapsulation efficiency, nanoparticle size and lamellarity, stability, and in v…
DOI: 10.1016/j.jpba.2020.113642 -
The development of an improved carrier system for sunscreen formulations based on crystalline lipid nanoparticles
This study evaluates the efficacy of crystalline lipid nanoparticles as a carrier system for the molecular sunscreen benzophenone-3, demonstrating that they enhance photoprotection and allow for a reduction in the amount of sunscreen needed.
DOI: 10.1016/s0378-5173(02)00219-3 -
Chewable Gelatin Emulsions for Oral Lipid Delivery: Elimination of Gastric Coalescence with κ‐Carrageenan
This study demonstrates that adding low-molecular-weight sodium κ-carrageenan (~106 kDa, with ~7% 40–50 kDa fragments) to gelatin-based chewable oil-in-water emulsions stabilizes them against gastric coalescence under simulated gastric fluid (SGF) at pH 2–4 without notably alter…
DOI: 10.1002/ejlt.202000282 -
Formulation, antimalarial activity and biodistribution of oral lipid nanoemulsion of primaquine
This study investigates the formulation, antimalarial activity, and biodistribution of an oral lipid nanoemulsion of primaquine, demonstrating its effectiveness in reducing the required dosage while improving liver uptake and oral bioavailability compared to conventional formula…
DOI: 10.1016/j.ijpharm.2007.06.035 -
Archaeal lipids in oral delivery of therapeutic peptides
This review summarizes how archaeal membrane lipids (diether and tetraether lipids) can stabilize liposomes for oral delivery of therapeutic peptides, detailing lipid structures, extraction/preparation methods, in vitro stability under acidic pH, bile salts and lipases, and in v…
DOI: 10.1016/j.ejps.2016.12.036 -
<I>In Situ</I> Lipidization as a New Approach for the Design of a Self Microemulsifying Drug Delivery System (SMEDDS) of Doxorubicin Hydrochloride for Oral Administration
The study presents an in situ lipidization strategy to design a self-microemulsifying drug delivery system (SMEDDS) for oral doxorubicin, demonstrating that lipidized Dox forms stable oil-phase partitions, enabling high drug loading, sustained release, substantially enhanced ora…
DOI: 10.1166/jbn.2015.1978 -
Biomimetic Solid Lipid Nanoparticles for Oral Bioavailability Enhancement of Low Molecular Weight Heparin and Its Lipid Conjugates: In Vitro and in Vivo Evaluation
This study investigates the synthesis of low molecular weight heparin (LMWH)-lipid conjugates and their encapsulation in biomimetic solid lipid nanoparticles (SLNs) to enhance oral bioavailability, demonstrating significantly improved absorption and safety in vivo compared to fr…
DOI: 10.1021/mp200109m -
Analysis of the enhanced oral bioavailability of fenofibrate lipid formulations in fasted humans using an in vitro–in silico–in vivo approach
This study investigates the enhanced oral bioavailability of fenofibrate lipid formulations in fasted humans through an integrated in vitro-in silico-in vivo approach, demonstrating significant improvements in solubility and dissolution rates compared to unformulated drug.
DOI: 10.1016/j.ejpb.2013.03.001 -
Effect of ethanol extract of boiled breadfruit ( Treculia Africana ) seed on the oral glucose tolerance, lipid profile, and body weight of normoglycemic albino rats
This study investigates the effects of ethanol extracts from boiled Treculia africana seeds on oral glucose tolerance, lipid profiles, and body weight in normoglycemic albino rats, revealing potential cardiovascular risks associated with its consumption.
DOI: 10.1002/fsn3.626 -
Redox sensitive lipid-camptothecin conjugate encapsulated solid lipid nanoparticles for oral delivery
A redox-responsive lipid-CPT conjugate (CPT-SS-PA) was encapsulated into solid lipid nanoparticles to enable oral delivery of camptothecin, showing redox-triggered drug release, enhanced lipophilicity and cellular uptake, improved in vivo bioavailability, and reduced intestinal …
DOI: 10.1016/j.ijpharm.2018.08.010 -
AmbiOnp: Solid Lipid Nanoparticles of Amphotericin B for Oral Administration
This study presents the formulation of solid lipid nanoparticles (AmbiOnp) for the oral administration of Amphotericin B, demonstrating enhanced stability, reduced nephrotoxicity, and improved bioavailability compared to the plain drug.
DOI: 10.1166/jbn.2011.1332 -
Lipidic prodrug approach for improved oral drug delivery and therapy
This review surveys lipidic prodrug strategies (fatty acid-, triglyceride-, phospholipid-, and steroid-based) to improve oral drug delivery by exploiting endogenous lipid pathways, detailing design principles, mechanisms (notably lymphatic transport and PLA2 activation), deliver…
DOI: 10.1002/med.21533 -
Lipid nanoparticles for cyclosporine A administration: development, characterization, and in vitro evaluation of their immunosuppression activity
This study developed and characterized lipid nanoparticles for the oral administration of cyclosporine A, demonstrating their potential as stable and effective immunosuppressive agents with high drug entrapment efficiency and favorable physicochemical properties.
DOI: 10.2147/IJN.S90849 -
Insulin-Loaded SLN Prepared with the Emulsion Dilution Technique: In Vivo Tracking of Nanoparticles after Oral Administration to Rats
This study investigates the intestinal absorption and biological tracking of insulin-loaded solid lipid nanoparticles (SLN) after oral administration in male Wistar rats, revealing significant drug accumulation in the lymphatic system but limited effectiveness in reducing blood …
DOI: 10.1080/01932691.2010.488497 -
Preparation, Characterization and Evaluation of Quetiapine Fumarate Solid Lipid Nanoparticles to Improve the Oral Bioavailability
This study investigates the preparation, characterization, and evaluation of quetiapine fumarate solid lipid nanoparticles (SLNs) to enhance its oral bioavailability, demonstrating a 3.71-fold increase in bioavailability compared to the standard suspension formulation.
DOI: 10.1155/2013/265741 -
Solid lipid nanoparticles (SLNs) to improve oral bioavailability of poorly soluble drugs
This study demonstrates that solid lipid nanoparticles (SLNs) can significantly enhance the oral bioavailability of poorly soluble drugs, specifically using all-trans retinoic acid (ATRA) as a model, by improving drug release and absorption in vivo.
DOI: 10.1211/0022357044959 -
Improved oral bioavailability of docetaxel by nanostructured lipid carriers: in vitro characteristics, in vivo evaluation and intestinal transport studies
This study investigates the use of nanostructured lipid carriers (NLCs) to enhance the oral bioavailability of docetaxel, demonstrating significant improvements in drug absorption and pharmacokinetics in vivo compared to traditional formulations.
DOI: 10.1039/c5ra14588k -
Antibacterial Action of Nanoparticles by Lethal Stretching of Bacterial Cell Membranes
The study demonstrates a mechano-bactericidal mechanism whereby non-translocating ~100 nm gold nanoparticles attach to bacterial membranes, generating membrane tension that stretches and ruptures membranes, leading to rapid bacterial killing, supported by a biophysical model and…
DOI: 10.1002/adma.202005679 -
Antibacterial activity of ZnO nanoparticles with a modified surface under ambient illumination
This study demonstrates that silane-based surface modification of ZnO nanoparticles alters antibacterial activity under ambient illumination in a manner not simply correlated with ROS production or Zn2+ release, with certain modified ZnO samples showing enhanced antibacterial ef…
DOI: 10.1088/0957-4484/23/47/475703 -
Efficient and Stable Display of Functional Proteins on Bacterial Magnetic Particles Using Mms13 as a Novel Anchor Molecule
Mms13, an integral BMP membrane protein, serves as an efficient and stable anchor for displaying functional proteins (luciferase, protein A) on bacterial magnetic particles, enabling sensitive immunoassays at single-particle level.
DOI: 10.1128/AEM.72.1.465-471.2006