- |||||||||| islatravir (MK-8591) / Merck (MSD)
PK/PD data, Journal: Pharmacokinetics of islatravir in participants with moderate hepatic impairment. (Pubmed Central) - Mar 5, 2025 P1 The clinical relevance of the overall modest changes in M4, ISL, and ISL-TP levels with moderate hepatic impairment will be contextualized once exposure response data from ongoing clinical studies are available to elucidate the thresholds for clinical efficiency. A single oral dose of ISL 60 mg was generally well tolerated in both groups.CLINICAL TRIALSThis study is registered with Clinicaltrials.gov as NCT04515641.
- |||||||||| islatravir (MK-8591) / Merck (MSD)
Journal: Nonclinical and clinical characterization of the absorption, metabolism, and excretion of islatravir. (Pubmed Central) - Feb 13, 2025 The pharmacologically active islatravir triphosphate is the most abundant intracellular phosphorylated species, as shown by the results of ex vivo studies. This characterization of the absorption, metabolism, and elimination of islatravir in humans and nonclinical species supports its further development for the treatment of HIV-1.
- |||||||||| Review, Journal: Current status of the small molecule anti-HIV drugs in the pipeline or recently approved. (Pubmed Central) - Aug 22, 2024
There is a considerable progress in the development of new anti-HIV drugs and the effort will continue since HIV infections has no cure or vaccine till now. Efforts are needed to reduce the toxicity of available drugs or discover new drugs with new classes which can delay the development of resistance.
- |||||||||| islatravir (MK-8591) / Merck (MSD)
Trial termination: Impower-022: Oral ISL QM as PrEP in Cisgender Women at High Risk for HIV-1 Infection (MK-8591-022) (clinicaltrials.gov) - Aug 9, 2024 P3, N=730, Terminated, In cisgender women at elevated risk of acquiring HIV-1, decreases in total lymphocyte counts observed with ISL 60mg QM were not associated with increased infection AEs and were followed by a trend of recovery after drug discontinuation. Active, not recruiting --> Terminated; Voluntarily terminated due to benefit/risk assessment
- |||||||||| Journal: Challenges for novel antiretroviral development in an era of widespread TLD availability. (Pubmed Central) - Jul 11, 2024
We illustrate when generic TLD will become available worldwide and compare this with trial programmes and approval timelines for two case-study novel ART combinations: islatravir/doravirine and cabotegravir/rilpivirine. We demonstrate that currently these regimens and trial programmes will not meet key benchmarks required to compete with TLD.
- |||||||||| P3 data, Journal, Head-to-Head: Switch to fixed-dose doravirine (100 mg) with islatravir (0 (Pubmed Central) - May 30, 2024
P3 The lack of antagonism and cross-resistance between ISL and LEN support the ongoing evaluation of the combination for treatment of HIV-1. Switching to daily doravirine (100 mg) and islatravir (0
- |||||||||| Pifeltro (doravirine) / Merck (MSD), doravirine/islatravir (MK-8591A) / Merck (MSD), islatravir (MK-8591) / Merck (MSD)
P3 data, Journal, Head-to-Head: Switch to fixed-dose doravirine (100 mg) with islatravir (0 (Pubmed Central) - May 30, 2024 P3 Switching to daily doravirine (100 mg) and islatravir (0 Switching to single-tablet doravirine (100 mg) and islatravir (0
- |||||||||| Monitoring the landscape of newer HIV medicines: multiple patenting and access challenges (Poster board: 647) - May 2, 2024 - Abstract #AIDS2024AIDS_3236;
The embargo on all abstracts, including oral abstract, poster exhibition, e-poster and late breakers, will lift on Tuesday, 23 July 2024, at 10:00 am Central European Summer Time (CEST). If an abstract is part of an official AIDS 2024 press conference that occurs before that time, the embargo on that abstract lifts at the start of the official press conference.
- |||||||||| islatravir (MK-8591) / Merck (MSD)
Journal: Insights into Factors Affecting Ethylene-Vinyl Acetate Copolymer Crystallinity in Islatravir Implant. (Pubmed Central) - Apr 3, 2024 Furthermore, DSC analysis of thin implant slices prepared with an ultramicrotome indicated that the surface layer of the implant was more crystalline than the core. These findings provide critical insights into factors affecting the crystallinity, mechanical properties, and physicochemical properties of the EVA polymer matrix of extruded islatravir implants.
- |||||||||| Sunlenca (lenacapavir) / Gilead, islatravir (MK-8591) / Merck (MSD)
Efficacy and Safety of Weekly Islatravir Plus Lenacapavir in PWH at 24 Weeks: A Phase II Study () - Mar 16, 2024 - Abstract #CROI2024CROI_1164; P2 In this Phase 2 study, the first QW oral ARV regimen of ISL+LEN maintained viral suppression at W24 and was well tolerated. The ISL 2 mg dose showed no clinically significant decreases in CD4+ T-cell counts or ALCs as were seen previously with higher daily, weekly, and monthly doses of ISL.
- |||||||||| MK-8527 / Merck (MSD)
Discovery of MK-8527: A Long-Acting HIV-1 Nucleoside Reverse Transcriptase Translocation Inhibitor (Poster hall) - Mar 16, 2024 - Abstract #CROI2024CROI_943; Background: Nucleoside reverse transcriptase translocation inhibitors (NRTTIs) such as islatravir (ISL) are potent inhibitors of HIV-1 replication. The subnanomolar potency, absence of off-target activity, and suitable PK for at least once-weekly dosing make MK-8527 an attractive clinical candidate for prophylaxis of HIV-1 infection
- |||||||||| islatravir (MK-8591) / Merck (MSD)
Journal: Islatravir: evaluation of clinical development for HIV and HBV. (Pubmed Central) - Jan 18, 2024 Additionally, MK-8527, which inhibits HIV via same mechanism as that of ISL may supersede ISL. Data on ISL inhibition of HBV are scarce, and preclinical data show dramatically lower ISL efficacy against HBV than currently preferred nucleos(t)ide drugs, indicating that ISL may not be a potent anti-HBV drug.
- |||||||||| islatravir (MK-8591) / Merck (MSD)
Journal: Variable antiviral activity of islatravir against M184I/V mutant HIV-1 selected during antiretroviral therapy. (Pubmed Central) - Dec 28, 2023 We present the structural elucidation of this dimer impurity and rationalize its form-dependent generation based on the analysis of the underlying crystal structure. Mutations and polymorphisms selected in vivo together with M184V/I depend on the viral genetic context and on ART history, and could affect the efficacy of islatravir once available for use in the clinic.
- |||||||||| MK-8507 / Merck (MSD), islatravir (MK-8591) / Merck (MSD)
Phase classification, Trial completion date, Trial primary completion date: Dose Ranging, Switch Study of Islatravir (ISL) and Ulonivirine (MK-8507) Once-Weekly in Virologically-Suppressed Adults With Human Immunodeficiency Virus Type 1 (HIV-1) [MK-8591-013] (clinicaltrials.gov) - Dec 17, 2023 P2, N=161, Active, not recruiting, Mutations and polymorphisms selected in vivo together with M184V/I depend on the viral genetic context and on ART history, and could affect the efficacy of islatravir once available for use in the clinic. Phase classification: P2b --> P2 | Trial completion date: Dec 2023 --> Sep 2024 | Trial primary completion date: Dec 2023 --> Sep 2024
- |||||||||| islatravir (MK-8591) / Merck (MSD)
Journal, Combination therapy: HIV-1 Resistance to Islatravir/Tenofovir Combination Therapy in Wild-Type or NRTI-Resistant Strains of Diverse HIV-1 Subtypes. (Pubmed Central) - Oct 28, 2023 We demonstrated that the S68G polymorphism can enhance fitness of drug-resistant mutants in some genetic backgrounds. Collectively, the data suggest that the opposing resistance profiles of ISL and TDF suggest that a combination of the two drugs could be a promising drug regimen for the treatment of patients infected with any HIV-1 subtype, including those who have failed 3TC/FTC-based therapies.
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