Investigating Internalization of Reporter-Protein-Functionalized Polyhedrin Particles by Brain Immune Cells

Krishma A. K. Parwana, Priyapreet Kaur Gill, Runyararo Njanike, Humphrey Hak Ping Yiu, Christopher F. Adams, Divya Maitreyi Chari, Stuart Iain Jenkins

Research output: Contribution to journalArticlepeer-review

7 Downloads (Pure)

Abstract

Achieving sustained drug delivery to the central nervous system (CNS) is a major challenge for neurological injury and disease, and various delivery vehicles are being developed to achieve this. Self-assembling polyhedrin crystals (POlyhedrin Delivery System; PODS) are being exploited for the delivery of therapeutic protein cargo, with demonstrated efficacy in vivo. However, to establish the utility of PODS for neural applications, their handling by neural immune cells (microglia) must be documented, as these cells process and degrade many biomaterials, often preventing therapeutic efficacy. Here, primary mouse cortical microglia were cultured with a GFP-functionalized PODS for 24 h. Cell counts, cell morphology and Iba1 expression were all unaltered in treated cultures, indicating a lack of acute toxicity or microglial activation. Microglia exhibited internalisation of the PODS, with both cytosolic and perinuclear localisation. No evidence of adverse effects on cellular morphology was observed. Overall, 20–40% of microglia exhibited uptake of the PODS, but extracellular/non-internalised PODS were routinely present after 24 h, suggesting that extracellular drug delivery may persist for at least 24 h.
Original languageEnglish
Article number2330
JournalMaterials
Volume17
Issue number10
DOIs
Publication statusPublished - 14 May 2024

Keywords

  • microglia
  • nanoparticles
  • microparticles
  • polyhedra
  • GFP
  • neural
  • crystals
  • drug delivery
  • drug depot
  • nucleus

Fingerprint

Dive into the research topics of 'Investigating Internalization of Reporter-Protein-Functionalized Polyhedrin Particles by Brain Immune Cells'. Together they form a unique fingerprint.

Cite this