Purines are heterocyclic aromatic compounds composed of linked pyrimidine and imidazole rings. In mammals, purines are most commonly expressed in DNA and RNA (including the purines adenine and guanine), as well as single-molecule nucleotides (adenosine triphosphate (ATP), adenosine diphosphate (ADP), adenosine monophosphate (AMP), cyclic AMP, and to a lesser extent guanosine triphosphate (GTP) and cyclic guanosine monophosphate (cGMP). Purines are also key elements of the following energy metabolism molecules: reduced nicotinamide adenine dinucleotide, nicotinamide adenine dinucleotide phosphate (NADPH), and coenzyme Q. Purines can also act as direct neurotransmitters; for example, adenosine may interact with receptors to modulate cardiovascular and central nervous system (CNS) function.
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Gilead and Merck announced results from the Phase 2 clinical study evaluating the investigational combination of islatravir, an investigational nucleoside reverse transcriptase translocation inhibitor, and lenacapavir, a first-in-class , long-acting HIV capsid inhibitor. At 24 weeks, the novel investigational combination maintained a high rate (94.2%) of viral suppression (HIV-1 RNA <50 copies/mL), which is a secondary endpoint of the study. Results of the primary endpoint (HIV-1 RNA ≥50 copies/mL (c/mL) showed that one participant (1.9%) treated with islatravir and lenacapavir had a viral load of >50 copies/mL at Week 24;the participant later suppressed on islatravir and lenacapavir at Week 30. Chemenu has been working to develop more compounds for drug discovery. Here are the building blocks we can provide.