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Pro-905 is a phosphonate peptide with antitumor activity. It delivers the active nucleotide antimetabolite thioinosine monophosphate (TGMP) to tumors. Pro-905 effectively inhibits the binding of purine residue substrates to nucleic acids, thereby suppressing colony formation of human malignant peripheral nerve sheath tumor (MPNST) cells. It prevents purine residues from incorporating into nucleic acids, hindering cell growth. Additionally, Pro-905 inhibits the growth of MPNST and enhances the antitumor effect of JHU395.


| Description | Pro-905 is a phosphonate peptide with antitumor activity. It delivers the active nucleotide antimetabolite thioinosine monophosphate (TGMP) to tumors. Pro-905 effectively inhibits the binding of purine residue substrates to nucleic acids, thereby suppressing colony formation of human malignant peripheral nerve sheath tumor (MPNST) cells. It prevents purine residues from incorporating into nucleic acids, hindering cell growth. Additionally, Pro-905 inhibits the growth of MPNST and enhances the antitumor effect of JHU395. |
| In vitro | Pro-905 (10 µM, 120 h) in combination with JHU395 (1 µM, 120 h) suppresses the proliferation of JH-2-002 cells and the incorporation of guanine into newly synthesized DNA and RNA. This combination also inhibits colony formation of human MPNST cells sNF96.2 and JH-2-002. Additionally, Pro-905 (10 µM, 6 h) reduces the binding of purine-dependent 3H-hypoxanthine to DNA and RNA in sNF96.2 cells. |
| In vivo | Pro-905 administered at 20 mg/kg via intraperitoneal injection, five days a week for four weeks, reduced tumor growth in NSG mice bearing human MPNST PDX JH-2-031. In a B6 flank MPNST mouse model, the combination of Pro-905 at 10 mg/kg (intraperitoneal injection, five days a week) and JHU395 at 1.2 mg/kg (oral administration) inhibited tumor nucleotide metabolism and suppressed MPNST proliferation. |
| Synonyms | MK-905 |
| Molecular Weight | 568.54 |
| Formula | C22H29N6O8PS |
| Cas No. | 2762209-68-5 |
| Storage | Powder: -20°C for 3 years | In solvent: -80°C for 1 year | Shipping with blue ice/Shipping at ambient temperature. |

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