Recent Publications - No name

Drug delivery strategies and systems for HIV/AIDS pre-exposure prophylaxis and treatment

Date: 
12/10/15
Citation: 

Nelson AG, Zhang X, Ganapathi U, et al. Drug delivery strategies and systems for HIV/AIDS pre-exposure prophylaxis and treatment. J Control Release. 2015;219:669-680. doi:10.1016/j.jconrel.2015.08.042. PMID: 26315816; PMCID: PMC4879940.

The year 2016 will mark an important milestone - the 35th anniversary of the first reported cases of HIV/AIDS. Antiretroviral Therapy (ART) including Highly Active Antiretroviral Therapy (HAART) drug regimens is widely considered to be one of the greatest achievements in therapeutic drug research having transformed HIV infection into a chronically managed disease. Unfortunately, the lack of widespread preventive measures and the inability to eradicate HIV from infected cells highlight the significant challenges remaining today.

Health Topics: 
HIV

    Systems Approach to Targeted and Long-acting HIV/AIDS Therapy

    Date: 
    12/5/15
    Citation: 

    Ho RJ, Yu J, Li B, et al. Systems Approach to targeted and long-acting HIV/AIDS therapy. Drug Deliv Transl Res. 2015;5(6):531-539. doi:10.1007/s13346-015-0254-y. PMID: 26315144; PMCID: PMC4826474.

    ABSTRACT
    Medication adherence and insufficient drug levels are central to HIV/AIDS disease progression. Recently, Fletcher et al. confirmed that HIV patients on oral antiretroviral therapy had lower intracellular drug concentrations in lymph nodes than in blood. For instance, in the same patient, multiple lymph node drug concentrations were as much as 99 % lower than in blood. This study built upon our previous finding that HIV patients taking oral indinavir had 3-fold lower mononuclear cell drug concentrations in lymph nodes than in blood. As a result, an association between insufficient lymph node drug concentrations in cells and persistent viral replication has now been validated. Lymph node cells, particularly CD4 T lymphocytes, host HIV infection and persistence; CD4 T cell depletion in blood correlates with AIDS progression. With established drug targets to overcome drug insufficiency in lymphoid cells and tissues, we have developed and employed a "Systems Approach" to engineer multi-drug-incorporated particles for HIV treatment.
     
    Health Topics: 
    HIV

      Regulatory challenges in developing long-acting antiretrovirals for treatment and prevention of HIV infection

      Date: 
      7/1/15
      Citation: 

      Arya V, Au S, Belew Y, Miele P, Struble K. Regulatory challenges in developing long-acting antiretrovirals for treatment and prevention of HIV infection. Curr Opin HIV AIDS. 2015 Jul;10(4):278-81. doi: 10.1097/COH.0000000000000163. PMID: 26049954.

      Despite advances in drug development that have reduced ARV dosing to once daily, suboptimal drug adherence remains an obstacle to successful HIV treatment. Further, large randomized trials of once daily oral ARVs for preexposure prophylaxis (PrEP) have shown that drug adherence correlates strongly with prophylactic effect and study outcomes. Thus, the prospect of developing long-acting ARVs, which may mitigate drug adherence issues, has attracted considerable attention lately.

      Health Topics: 
      HIV

        Long-acting HIV Drugs Advanced to Overcome Adherence Challenge

        Date: 
        4/7/14
        Citation: 

        Dolgin E. Long-acting HIV Drugs Advanced to Overcome Adherence Challenge Nat Med. 2014 Apr 7;20(4):323-4. PMID: 24710366.

        The results from a particular drug trial presented here last month at the annual Conference on Retroviruses and Opportunistic Infections (CROI) may not have seemed particularly noteworthy. It simply showed that two pills performed as well as another combination of medicines. But the antiretroviral agents tested in the trial were not your ordinary drugs.

        Health Topics: 
        HIV

          Long-acting injectable antiretrovirals for HIV treatment and prevention

          Date: 
          11/15/13
          Citation: 

          Spreen WR, Margolis DA, & Pottage JC Jr. Long-acting injectable antiretrovirals for HIV treatment and prevention. Curr Opin HIV AIDS. 2013 Nov;8(6):565-71. PMID: 24100877; PMCID: PMC3815009.

          Investigational long-acting injectable nanoformulations of rilpivirine and GSK1265744 are clinical-stage development candidates. 

          Health Topics: 
          HIV

            Long-acting injectable atovaquone nanomedicines for malaria prophylaxis

            Citation: 

            Bakshi RP, Tatham LM, Savage AC, et al. Long-acting injectable atovaquone nanomedicines for malaria prophylaxis. Nat Commun. 2018;9(1):315. Published 2018 Jan 22. doi:10.1038/s41467-017-02603-z. PMID: 29358624, PMCID: PMC5778127.

            Chemoprophylaxis is currently the best available prevention from malaria, but its efficacy is compromised by non-adherence to medication. Here we develop a long-acting injectable formulation of atovaquone solid drug nanoparticles that confers long-lived prophylaxis against Plasmodium berghei ANKA malaria in C57BL/6 mice. Protection is obtained at plasma concentrations above 200 ng ml-1 and is causal, attributable to drug activity against liver stage parasites

              Physiologically Based Pharmacokinetic Modelling to Inform Development of Intramuscular Long-Acting Nanoformulations for HIV

              Citation: 

              Rajoli RK, Back DJ, Rannard S, et al. Physiologically Based Pharmacokinetic Modelling to Inform Development of Intramuscular Long-Acting Nanoformulations for HIV. Clin Pharmacokinet. 2015;54(6):639-650. doi:10.1007/s40262-014-0227-1. PMID: 25523214; PMCID: PMC4450126.

              These data may help inform the target product profiles for LA antiretroviral reformulation strategies.

              Health Topics: 
              HIV
              LA/ER Injectable Therapy

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