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2-Hydroxypropyl-β-cyclodextrin-enhanced Pharmacokinetics of Cabotegravir From a Nanofluidic Implant for HIV Pre-Exposure Prophylaxis

2-Hydroxypropyl-β-cyclodextrin-enhanced Pharmacokinetics of Cabotegravir From a Nanofluidic Implant for HIV Pre-Exposure Prophylaxis

Fernanda P Pons-Faudoa, Antons Sizovs, Nicola Di Trani, Jesus Paez-Mayorga, Giacomo Bruno, Jessica Rhudy, Madhuri Manohar, Kevin Gwenden, Cecilia Martini, Corrine Ying Xuan Chua, Greta Varchi, Mark A Marzinke, etc.

J Control Release. 2019 Jul 28;306:89-96.

PMID: 31136811

Abstract:

Preexposure prophylaxis (PrEP) with antiretrovirals (ARV) can prevent human immunodeficiency virus (HIV) transmission, but its efficacy is highly dependent on strict patient adherence to daily dosing regimen. Long-acting (LA) ARV formulations or delivery systems that reduce dosing frequency may increase adherence and thus PrEP efficacy. While cabotegravir (CAB) long-acting injectable (CAB LA), an integrase strand transfer inhibitor (INSTI), reduces dosing frequency to bimonthly injections, variable pharmacokinetics (PK) between patients and various adverse reactions necessitate improvement in delivery methods. Here we developed a subcutaneously implantable nanofluidic device for the sustained delivery of CAB formulated with 2-hydroxypropyl-β-cyclodextrin (βCAB) and examined the pharmacokinetics (PK) in Sprague-Dawley rats for 3 months in comparison to CAB. Our study demonstrated βCAB treatment group maintained clinically-relevant plasma CAB concentrations 2 times above the protein-adjusted concentration that inhibits viral replication by 90% (2 × PA-IC90) and drug penetration into tissues relevant to HIV-1 transmission. Further, we successfully fitted plasma CAB concentrations into a PK model (R2 = 0.9999) and determined CAB apparent elimination half-life of 47 days. Overall, our data shows the potential of sustained release of βCAB via a nanofluidic implant for long-term PrEP delivery, warranting further investigation for efficacy against HIV infections.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP128446355	(2-Hydroxypropyl)-β-cyclodextrin		128446-35-5	Price

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