Fat-packed: Cayman LNPs deliver Biomolecules to their Target – Part 2

Lipid nanoparticles (LNPs) have become an integral part of modern drug research. As versatile delivery systems, they can protect sensitive nucleic acids such as mRNA, siRNA, and plasmid DNA and facilitate their delivery into cells [1]. This is made possible by the interplay of different lipid components: ionizable lipids, sterols, glycerophospholipids, and PEGylated lipids each serve distinct functions and play a key role in determining the properties of the resulting LNPs. In the first part of our LNP series, we took a closer look at how LNPs are structured and the role played by their individual lipid components.

However, getting the lipid composition right is only part of the equation. The manufacturing and processing of LNPs also have a major impact on their properties and performance. So, how do individual lipids become functional nanoparticles? And what options are available if you would rather not formulate LNPs from scratch? In the second part of our LNP series, we take a closer look at how LNPs can be formulated and processed in the laboratory and explore the solutions offered by Cayman Chemical for different requirements in LNP research.

1) How the Packaging Is Made: LNP Formulation

2) Save Time: Accelerate Your Workflows with LipidLaunch™ Research Tools

How the Packaging Is Made: LNP Formulation

LNPs can be produced at laboratory scale using relatively simple methods (Fig. 1). Before starting the formulation process, all materials, reagents, and work surfaces should be confirmed to be RNase-free to minimize the risk of RNA degradation. For LNP formulation, an ethanolic lipid mixture is combined with an acidic aqueous solution containing the nucleic acid cargo (Fig. 1). Various methods can be used to mix the two phases. In particular, microfluidic systems and microfluidic chips enable rapid and controlled mixing of the two phases, facilitating reproducible LNP production. Alternatively, methods such as ethanol injection or manual mixing can also be used. Depending on the process conditions, however, these methods may result in a broader particle size distribution and lower reproducibility [1; 2].

Following the mixing step, the LNPs undergo processing to remove excess components and adjust the desired physicochemical properties of the particles (Fig. 1). Depending on the formulation process, different purification steps may be used. For example, extrusion can help standardize particle size and size distribution. Dialysis or other buffer exchange methods can be used to remove ethanol and adjust the formulation to the desired pH. Unencapsulated nucleic acid cargo and other free components can, for example, be removed using appropriate filtration or chromatographic methods. Finally, sterile filtration through a 0.22 µm filter can be used to remove microbial contaminants before storage [1; 2; 3].

Figure 1: Laboratory production of lipid nanoparticles (LNPs). An ethanolic lipid mixture and an aqueous solution containing nucleic acid cargo are combined using various methods, such as microfluidic systems or chips, ethanol injection, or manual mixing. This results in the formation of LNPs, which can then undergo further processing. Size-exclusion extrusion can help standardize particle size and size distribution [2].

Save Time: Accelerate Your Workflows with LipidLaunch™ Research Tools

Would you rather skip the time-consuming LNP formulation process? The LipidLaunch™ Research Tools from Cayman Chemical offer convenient solutions for different stages of LNP research. For a quick start, pre-formulated LNPs containing mRNA encoding a reporter protein, such as GFP, are available. They are suitable for pilot and proof-of-concept experiments, for example to evaluate different target cell types and identify suitable culture conditions for LNP-based applications.

If, on the other hand, you want to use your own nucleic acid as the cargo and gain initial insights into your target of interest, loadable LNPs are a suitable option. They allow you to load LNPs with your cargo of choice and subsequently use them in transfection experiments. The cellular uptake of your LNP preparation can be visualized using fluorescent tracers. The LNP Uptake Kits are designed for this purpose. And if you want to produce your own LNPs, the LNP Exploration Kits provide a straightforward starting point. They enable LNP production using flexible protocols and standard laboratory equipment [4].

Lipid nanoparticles are setting new standards in medicine: As versatile drug delivery systems, they enable the protection and efficient delivery of sensitive or poorly soluble molecules. By combining a range of functional properties, they have not only played a major role in advancing the development of COVID-19 vaccines but are also being extensively investigated for numerous other pharmaceutical applications. Our partner Cayman Chemical supports your LNP research with a comprehensive portfolio, ranging from individual lipids for customized formulation to preloaded and loadable LNPs as well as convenient LNP kits. This gives you access to suitable solutions for a wide range of research needs and applications.

Curious to learn more? Explore the complete Cayman Chemical portfolio or discover more about LNPs on our blog!

Sources

[1] Mendes, B.B., Conniot, J., Avital, A. et al. Nanodelivery of nucleic acids. Nat Rev Methods Primers 2, 24 (2022).

[2] http://cdn2.caymanchem.com/cdn/cms/caymanchem/LiteratureCMS/Lipid%20Nanoparticle%20Formulation.pdf?_gl=1*4b4g6o*_gcl_au*MTE2MzkyNTM5NS4xNzg1NzQxMDY0*_ga*MjEzNTQyOTI4Mi4xNzg1NzQxMDY0*_ga_PCKSCEBC2D*czE3ODY2OTUwMTkkbzgkZzEkdDE3ODY2OTUzMDIkajU0JGwwJGgw, 14.08.2026

[3] Hou, X., Zaks, T., Langer, R. et al. Lipid nanoparticles for mRNA delivery. Nat Rev Mater 6, 1078–1094 (2021).

[4] https://www.caymanchem.com/lipid-nanoparticles, 14.08.2026

Preview Image: https://www.caymanchem.com/lipid-nanoparticles