purine nucleoside phosphorylase

Purine Nucleoside Phosphorylase, an essential enzyme in purine metabolism, plays a critical role in the purine salvage pathway. Its deficiency impairs T cell function. With inorganic orthophosphate as a co-substrate, this enzyme catalyzes the cleavage of the glycosidic bond linking ribose and deoxyribonucleoside, resulting in the production of a purine base and ribose (deoxyribose)-1-phosphate [1].

Peldesine (BCX 34) is an effective, competitive, reversible, and orally active inhibitor of purine nucleoside phosphorylase. Peldesine inhibits T-cell proliferation with an IC50 of 800 nM. Peldesine can be used in research on cutaneous T-cell lymphoma, psoriasis and HIV infection.

Allopurinol riboside is a metabolite of allopurinol with potency against parasites. Allopurinol riboside competitively inhibits the action of purine nucleoside phosphorylase on inosine with a Ki of 277 μM.

Ulodesine (BCX4208) is a purine nucleoside phosphorylase (PNP) inhibitor that inhibits PNP with an IC50 value of 2.293 nM/L. Ulodesine may be used to study hyperuricaemia.

Hypoxanthine (Purin-6-ol), also known as purine-6-ol or Hyp. Hypoxanthine is a naturally occurring purine derivative and a reaction intermediate in the metabolism of adenosine and in the formation of nucleic acids by the nucleotide salvage pathway. Under normal circumstances hypoxanthine is readily converted to uric acid.hypoxanthine is first oxidized to xanthine, which is further oxidized to uric acid by xanthine oxidase.

8-Azaguanine (SK 1150) is a purine analogue with potential antineoplastic activity.

2'-Fluoro-2'-Deoxyadenosine is efficiently cleaved to the toxic 2-fluoroadenine (FAde) by Escherichia coli purine nucleoside phosphorylase (PNP). 2'-Fluoro-2'-Deoxyadenosine showed good in vivo activity against tumors expressing E. coli PNP. 2'-Fluoro-2'-Deoxyadenosine can be used to synthesize 2'-deoxy-2'-fluoromodified oligonucleotides that can hybridize to RNA.

Forodesine (BCX-1777) is an orally active and potent purine nucleoside phosphorylase (PNP) inhibitor, a new purine nucleoside analog, inhibitor of human lymphocyte proliferation, induces apoptosis in leukemic cells by increasing dGTP levels, and may be useful in the study of cutaneous T-cell lymphomas.

5-Aza-7-deazaguanine is a non-natural substituted nucleobase with potential antiviral activity. It can be used in cancer and bacterial infection research.

2'-Deoxyinosine (Guanine deoxyriboside) inhibits the growth of human colon-carcinoma cell lines and is associated with purine nucleoside phosphorylase (PNP) deficiency.

3'-Deoxyguanosine is a ligand that can be complexed with enzymes, such as purine nucleoside phosphorylase, and receptors.

Forodesine hydrochloride (BCX-1777 hydrochloride), a potent inhibitor of human lymphocyte proliferation, effectively induces apoptosis in leukemic cells by elevating dGTP levels. This compound is an orally active, highly potent purine nucleoside phosphorylase (PNP) inhibitor, demonstrating IC50 values between 0.48 to 1.57 nM across human, mouse, rat, monkey, and dog PNP.

CI 972 anhydrous is an inhibitor of purine nucleoside phosphorylase (PNP) (Ki: 0.83 μM) used as a T cell-selective immunosuppressive agent.

8-Aminoguanine is an endogenous purine that inhibits PNPase (purine nucleoside phosphorylase). This compound can induce diuresis, natriuresis, and glucosuria.

Peldesine (BCX 34) dihydrochloride is a potent, competitive, reversible, and orally active inhibitor of purine nucleoside phosphorylase (PNP), with IC50 values of 36 nM, 5 nM, and 32 nM against human, rat, and mouse red blood cell (RBC) PNP, respectively. Additionally, it inhibits T-cell proliferation with an IC50 of 800 nM, showing promise for research into cutaneous T-cell lymphoma, psoriasis, and HIV infection [1] [2] [3] [4].

MDL-74428 is an inhibitor of purine nucleoside phosphorylase.

8-Aminoinosine is an endogenous 8-aminopurine that induces diuresis, natriuresis, and glucosuria by inhibiting purine nucleoside phosphorylase (PNPase).

9-Deazaguanine is a nucleoside analogue exhibiting inhibitory activity against bovine purine nucleoside phosphorylase (PNP).

(R)-C12-200, an ionizable cationic lipid (pKa = 7.25) and isomer of C12-200, is utilized in forming lipid nanoparticles (LNPs) for delivering mRNA in vivo. When administered intravenously, LNPs containing (R)-C12-200 with mRNA encoding Cre recombinase result in a smaller increase in the percentage of tdTomato+ hepatocytes, endothelial cells, and Kupffer cells in the liver of Ai14 mice compared to LNPs with (S)-C12-200. Additionally, LNPs with (R)-C12-200 carrying mRNA for purine nucleoside phosphorylase (PNP), an E. coli enzyme that transforms fludarabine phosphate into the cytotoxic agent 2-fluoroadenine, prompt intratumoral PNP expression and diminish tumor volume in a FaDu head and neck squamous cell carcinoma (HNSCC) mouse xenograft model when fludarabine phosphate is co-administered.

Nucleoside Derivatives –7-Deaza-purine nucleosides; Drugs and Inhibitors; Purine nucleoside phosphorylase inhibitor