Macrophage endocytic trafficking of antiretroviral nanoparticles

I Kadiu, A Nowacek, JE McMillan, HE Gendelman - Nanomedicine, 2011 - Future Medicine
I Kadiu, A Nowacek, JE McMillan, HE Gendelman
Nanomedicine, 2011Future Medicine
Aim: Nanoformulated antiretroviral therapy can improve drug compliance for people infected
with HIV. Additional benefits would include specific drug deliveries to viral reservoirs and
reduction in systemic toxicities. Methods: In this article, we describe mechanisms of
crystalline antiretroviral nanoparticle (NP) uptake, intracellular trafficking and release in
human monocyte-derived macrophages. Results: Following clathrin-dependent endocytosis
NPs bypassed lysosomal degradation by sorting from early endosomes to recycling …
Aim
Nanoformulated antiretroviral therapy can improve drug compliance for people infected with HIV. Additional benefits would include specific drug deliveries to viral reservoirs and reduction in systemic toxicities.
Methods
In this article, we describe mechanisms of crystalline antiretroviral nanoparticle (NP) uptake, intracellular trafficking and release in human monocyte-derived macrophages.
Results
Following clathrin-dependent endocytosis NPs bypassed lysosomal degradation by sorting from early endosomes to recycling endosome pathways. Disruption of this pathway by siRNAs or brefeldin-A impaired particle release. Proteomic and biological analysis demonstrated that particle recycling was primarily Rab11 regulated. Particles were released intact and retained complete antiretroviral efficacy.
Conclusion
These results suggest possible pathways of subcellular transport of antiretroviral nanoformulations that preserve both particle integrity and antiretroviral activities demonstrating the potential utility of this approach for targeted drug delivery.
Future Medicine