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Novel Quatsome nanovesicles, prepared using compressed CO2, for the development of advanced nanomedicines

Guillem Vargas Nadal, researcher at Nanomol Group – NANBIOSIS U6 (ICMAB-CSIC and CIBER-BBN) and Nanomol Technologies will defend his PhD thesis on Friday, 23 October 2020, at 11 am in an online session. The PhD Thesis Defense will be held by videoconference from the ICMAB Meeting Room. 

Further information and Registration to attend the PhD Thesis defense via Zoom nanoparticles at ICMAB-website.

Supervisors:

  • Nora Ventosa (Scientific Director of NANBIOSIS U6 Biomaterial Processing and Nanostructuring Unit and leader of Nanomol Group of CIBER-BBN
  • Lidia Ferrer (Nanomol Technologies S.L.)

Abstract: The nanovesicles are being developed and investigated to be used in the pharmaceutical world to deliver drug and detect diseases. However, there are some drawbacks related to the nanovesicles that must be considered, like their stability and their applicability. Concerning that, in this Thesis we have developed a new type of stable nanovesicles called MKC-Quatsomes to be used as intravenous drug delivery systems. Their production, physicochemical characteristics, and stability are strongly related to the dispersant medium. Furthermore, the MKC-Quatsomes were labeled with fluorescent organic dyes, which present FRET phenomenon in order to overcome the drawbacks of the single-dye-loaded nanoparticles.


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New nanocarrier for bio-imaging and drug-delivery applications

Researchers of CIBER-BBN and NANBIOSIS-ICTS (U6 Biomaterial Processing and Nanostructuring Unit at ICMAB-CSIC and U18 Nanotoxicology Unit at  Hospital de la Santa Creu i Sant Pau have developed a new nanocarrier for bio-imaging and drug-delivery applications

The new nanovesicle formulation is based on the quatsome architecture – which stands out due to the high colloidal stability and homogeneity in size – and has now been shown to be suitable for in vivo dosing.

Quatsomes are new non-liposomal lipid-based nanovesicles that have been developed by Nanomol group in recent years, and have been shown to be highly homogeneous and stable in different media for years. This colloidal stability involves important advantages for the development of pharmaceutical formulations and for guaranteeing the final product quality. Quatsomes are a promising nanocarrier for bio-imaging and drug-delivery applications, suitable for the encapsulation of both hydrophilic and hydrophobic molecules, easily functionalized with elements that favor the directionality towards therapeutic targets.

To facilitate their use in in vivo applications, Nanomol group has now developed a new Quatsome formulation, composed of cholesterol and myristalkonium chloride (MKC), the C14 homolog of benzalkonium chloride (BAK), the latter being extensively used as antimicrobial preservative in many ophthalmic and parenteral formulations on the EU and USA market. These novel MKC-Quatsomes have been synthesized in different media that are suitable for parenteral administration, in which they showed to be stable for at least 18 months. Moreover, vesicles remained stable in human serum for at least 24 hours.

In collaboration with the Oncogenesis and Antitumour Drug group of the Biomedical Research Institute of the Hospital de la Santa Creu i Sant Pau, these MKC-Quatsomes were tested in live mice bearing xenografted colorectal tumors. After intravenous injection of fluorescently labelled MKC-Quatsomes, biodistribution assays showed nanovesicle accumulation in tumors, liver, spleen, and kidneys, but not in any other organ. Importantly, MKC-Quatsomes were well-tolerated at the administered doses, and no histological alterations or toxicity was found in any of these organs. These new results suggest the applicability of quatsomes in therapeutic approaches that require systemic delivery.

NANOMOL group, Coordinator of NANBIOSIS U6 at ICMAB-CSIC and the Oncogenesis and Antitumor Drug group, coordinator NANBIOSIS U18 at Biomedical Research Institute (Hospital de la Santa Creu i Sant Pau) are members of Biomedical Research Networking center in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN) and have a wide expertise and recognized excellence in the synthesis, processing and study of molecular and polymeric materials and the study of their biomedical properties. NANOMOL is also a member of the technology transfer network TECNIO. ‘

Article of reference:

MKC-Quatsomes. A stable nanovesicle platform for bio-imaging and drug-delivery applications co-authored by Guillem Vargas-Nadal et al., Nanomedicine: Nanotechnology, Biology and Medicine, 24 (2020) 102136. https://doi.org/10.1016/j.nano.2019.102136

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