1
|
Tintori C, Iovenitti G, Ceresola ER, Ferrarese R, Zamperini C, Brai A, Poli G, Dreassi E, Cagno V, Lembo D, Canducci F, Botta M. Rhodanine derivatives as potent anti-HIV and anti-HSV microbicides. PLoS One 2018; 13:e0198478. [PMID: 29870553 PMCID: PMC5988308 DOI: 10.1371/journal.pone.0198478] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2018] [Accepted: 05/18/2018] [Indexed: 12/12/2022] Open
Abstract
Although highly active antiretroviral therapies (HAART) remarkably increased life expectancy of HIV positive people, the rate of novel HIV-1 infections worldwide still represent a major concern. In this context, pre-exposure prophylaxis (PrEP) approaches such as vaginal microbicide gels topically releasing antiretroviral drugs, showed to have a striking impact in limiting HIV-1 spread. Nevertheless, the co-presence of other genital infections, particularly those due to HSV-1 or 2, constitute a serious drawback that strongly limits the efficacy of PrEP approaches. For this reason, combinations of different compounds with mixed antiviral and antiretroviral activity are thoroughly investigated Here we report the synthesis and the biological evaluation of a novel series of rhodanine derivatives, which showed to inhibit both HIV-1 and HSV-1/2 replication at nanomolar concentration, and were found to be active also on acyclovir resistant HSV-2 strains. The compounds showed a considerable reduction of activity in presence of serum due to a high binding to serum albumin, as determined through in vitro ADME evaluations. However, the most promising compound of the series maintained a considerable activity in gel formulation, with an EC50 comparable to that obtained for the reference drug tenofovir. Moreover, the series of compounds showed pharmacokinetic properties suitable for topical formulation, thus suggesting that the novel rhodanine derivatives could represent effective agents to be used as dual anti HIV/HSV microbicides in PrEP approaches.
Collapse
Affiliation(s)
- Cristina Tintori
- Department of Biotechnology, Chemistry and Pharmacy, University of Siena, Siena, Italy
| | - Giulia Iovenitti
- Department of Biotechnology, Chemistry and Pharmacy, University of Siena, Siena, Italy
| | - Elisa Rita Ceresola
- Laboratory of Microbiology and Virology, Ospedale San Raffaele, Milan, Italy
| | - Roberto Ferrarese
- Laboratory of Microbiology and Virology, Ospedale San Raffaele, Milan, Italy
| | - Claudio Zamperini
- Department of Biotechnology, Chemistry and Pharmacy, University of Siena, Siena, Italy
- Lead Discovery Siena S.r.l., Castelnuovo Berardenga, Siena, Italy
| | - Annalaura Brai
- Department of Biotechnology, Chemistry and Pharmacy, University of Siena, Siena, Italy
- Lead Discovery Siena S.r.l., Castelnuovo Berardenga, Siena, Italy
| | - Giulio Poli
- Department of Biotechnology, Chemistry and Pharmacy, University of Siena, Siena, Italy
| | - Elena Dreassi
- Department of Biotechnology, Chemistry and Pharmacy, University of Siena, Siena, Italy
| | - Valeria Cagno
- Laboratory of Molecular Virology and Antiviral Research. Department of Clinical and Biological Sciences, University of Torino, Orbassano, Torino, Italy
- Department of Molecular Microbiology, University of Geneva, Geneva, Switzerland
| | - David Lembo
- Laboratory of Molecular Virology and Antiviral Research. Department of Clinical and Biological Sciences, University of Torino, Orbassano, Torino, Italy
| | - Filippo Canducci
- Laboratory of Microbiology and Virology, Ospedale San Raffaele, Milan, Italy
| | - Maurizio Botta
- Department of Biotechnology, Chemistry and Pharmacy, University of Siena, Siena, Italy
- Lead Discovery Siena S.r.l., Castelnuovo Berardenga, Siena, Italy
- Sbarro Institute for Cancer Research and Molecular Medicine, Center for Biotechnology, College of Science and Technology, Temple University, Philadelphia, PA, United States of America
| |
Collapse
|
2
|
Hardnett FP, Rose CE. Measuring the potential role of frailty in apparent declining efficacy of HIV interventions. HIV CLINICAL TRIALS 2015; 16:219-27. [PMID: 26728574 PMCID: PMC4867861 DOI: 10.1080/15284336.2015.1123944] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Objective:In recent HIV intervention trials, intervention efficacies appear to decline over time. Researchers have attributed this to “waning,” or a loss of intervention efficacy. Another possible reason is heterogeneity in infection risk or “frailty.” We propose an approach to assessing the impact of frailty and waning on measures of intervention efficacy and statistical power in randomized-controlled trials. Methods:Using multiplicative risk reduction, we developed a mathematical formulation for computing disease incidence and the incidence rate ratio (IRR) as a function of frailty and waning. We designed study scenarios, which held study-related factors constant, varied waning and frailty parameters and measured the change in disease incidence, IRR, and statistical power. Results:We found that frailty alone can impact disease incidence over time. However, frailty has minimal impact on the IRR. The factor that has the greatest influence on the IRR is intervention efficacy and the degree to which it is projected to wane. We also found that even moderate waning can cause an unacceptable decrease in statistical power while the impact of frailty on statistical power is minimal. Discussion:We conclude that frailty has minimal impact on trial results relative to intervention efficacy. Study resources would, therefore, be better spent on efforts to keep the intervention efficacy constant throughout the trial (e.g., enhancing the vaccine schedule or promoting treatment adherence).
Collapse
Affiliation(s)
- Felicia P Hardnett
- Division of HIV/AIDS Prevention, National Center for HIV/AIDS, Viral Hepatitis, STD, and TB Prevention, Centers for Disease Control and Prevention , Atlanta, GA, USA
| | | |
Collapse
|
3
|
Rollenhagen C, Lathrop MJ, Macura SL, Doncel GF, Asin SN. Herpes simplex virus type-2 stimulates HIV-1 replication in cervical tissues: implications for HIV-1 transmission and efficacy of anti-HIV-1 microbicides. Mucosal Immunol 2014; 7:1165-74. [PMID: 24496317 PMCID: PMC4137741 DOI: 10.1038/mi.2014.3] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2013] [Revised: 12/18/2013] [Accepted: 01/03/2014] [Indexed: 02/04/2023]
Abstract
Herpes Simplex virus Type-2 (HSV-2) increases the risk of HIV-1 acquisition, yet the mechanism for this viral pathogen to regulate the susceptibility of the cervicovaginal mucosa to HIV-1 is virtually unknown. Using ex vivo human ectocervical tissue models, we report greater levels of HIV-1 reverse transcription, DNA integration, RNA expression, and virions release in HIV-1/HSV-2 co-infected tissues compared with HIV-1 only infected tissues (P<0.05). Enhanced HIV-1 replication was associated with increased CD4, CCR5, and CD38 transcription (P<0.05) and increased number of CD4(+)/CCR5(+)/CD38(+) T cells in HIV-1/HSV-2 co-infected tissues compared with tissues infected with HIV-1 alone. Tenofovir (TFV) 1% gel, the leading microbicide candidate, demonstrated only partial protection against HIV-1, when applied vaginally before and after sexual intercourse. It is possible that mucosal inflammation, in particular that induced by HSV-2 infection, may have decreased TFV efficacy. HSV-2 upregulated the number of HIV-1-infected cells and elevated the concentration of TFV needed to decrease HIV-1 infection. Similarly, only high concentrations of TFV inhibited HSV-2 replication in HIV-1/HSV-2-infected tissues. Thus, HSV-2 co-infection and mucosal immune cell activation should be taken into consideration when designing preventative strategies for sexual transmission of HIV-1.
Collapse
Affiliation(s)
- C Rollenhagen
- V.A. Medical Center, White River Junction, Vermont, USA,Department of Microbiology and Immunology, Dartmouth Medical School, Lebanon, New Hampshire, USA
| | - M J Lathrop
- Department of Microbiology and Immunology, Dartmouth Medical School, Lebanon, New Hampshire, USA
| | - S L Macura
- V.A. Medical Center, White River Junction, Vermont, USA
| | - G F Doncel
- CONRAD, Eastern Virginia Medical School, Norfolk, Virginia, USA
| | - S N Asin
- V.A. Medical Center, White River Junction, Vermont, USA,Department of Microbiology and Immunology, Dartmouth Medical School, Lebanon, New Hampshire, USA,
| |
Collapse
|
4
|
Bon I, Lembo D, Rusnati M, Clò A, Morini S, Miserocchi A, Bugatti A, Grigolon S, Musumeci G, Landolfo S, Re MC, Gibellini D. Peptide-derivatized SB105-A10 dendrimer inhibits the infectivity of R5 and X4 HIV-1 strains in primary PBMCs and cervicovaginal histocultures. PLoS One 2013; 8:e76482. [PMID: 24116111 PMCID: PMC3792046 DOI: 10.1371/journal.pone.0076482] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2013] [Accepted: 08/30/2013] [Indexed: 11/19/2022] Open
Abstract
Peptide dendrimers are a class of molecules that exhibit a large array of biological effects including antiviral activity. In this report, we analyzed the antiviral activity of the peptide-derivatized SB105-A10 dendrimer, which is a tetra-branched dendrimer synthetized on a lysine core, in activated peripheral blood mononuclear cells (PBMCs) that were challenged with reference and wild-type human immunodeficiency virus type 1 (HIV-1) strains. SB105-A10 inhibited infections by HIV-1 X4 and R5 strains, interfering with the early phases of the viral replication cycle. SB105-A10 targets heparan sulfate proteoglycans (HSPGs) and, importantly, the surface plasmon resonance (SPR) assay revealed that SB105-A10 strongly binds gp41 and gp120, most likely preventing HIV-1 attachment/entry through multiple mechanisms. Interestingly, the antiviral activity of SB105-A10 was also detectable in an organ-like structure of human cervicovaginal tissue, in which SB105-A10 inhibited the HIV-1ada R5 strain infection without altering the tissue viability. These results demonstrated the strong antiviral activity of SB105-A10 and suggest a potential microbicide use of this dendrimer to prevent the heterosexual transmission of HIV-1.
Collapse
Affiliation(s)
- Isabella Bon
- Department of Experimental, Diagnostic and Specialty Medicine (DIMES), Microbiology Section, University of Bologna, Bologna, Italy
| | - David Lembo
- Department of Clinical and Biological Sciences, University of Torino, Orbassano, Torino, Italy
| | - Marco Rusnati
- Department of Biomedical Sciences and Biotechnology, University of Brescia, Brescia, Italy
| | - Alberto Clò
- Department of Experimental, Diagnostic and Specialty Medicine (DIMES), Microbiology Section, University of Bologna, Bologna, Italy
| | - Silvia Morini
- Department of Experimental, Diagnostic and Specialty Medicine (DIMES), Microbiology Section, University of Bologna, Bologna, Italy
| | - Anna Miserocchi
- Department of Experimental, Diagnostic and Specialty Medicine (DIMES), Microbiology Section, University of Bologna, Bologna, Italy
| | - Antonella Bugatti
- Department of Biomedical Sciences and Biotechnology, University of Brescia, Brescia, Italy
| | | | - Giuseppina Musumeci
- Department of Experimental, Diagnostic and Specialty Medicine (DIMES), Microbiology Section, University of Bologna, Bologna, Italy
| | - Santo Landolfo
- Department of Public Health and Microbiology, University of Torino, Torino, Italy
| | - Maria Carla Re
- Department of Experimental, Diagnostic and Specialty Medicine (DIMES), Microbiology Section, University of Bologna, Bologna, Italy
- Interuniversity Consortium, National Institute Biostructure and Biosystems (INBB) Roma, Italy
| | - Davide Gibellini
- Department of Experimental, Diagnostic and Specialty Medicine (DIMES), Microbiology Section, University of Bologna, Bologna, Italy
| |
Collapse
|