Design and Synthesis of Peptidomimetic Protein Farnesyltransferase Inhibitors as Anti-Trypanosoma brucei Agents
摘要:
On the basis of the structure of the CVIM tetrapeptide substrate of mammalian protein farnesyltransferase, a series of imidazole-containing peptidomimetics was designed and synthesized, and their inhibition activity against Trypanosoma brucel protein farnesyltransferase (TbPFT) was evaluated. Peptidomimetics where the 5-position of the imidazole ring was linked to the hydrophobic scaffold showed over 70% inhibition activity at 50 nM in the enzyme assay, whereas the corresponding C-4 regioisomers were less potent. The ester prodrug 23 was found to be a potent inhibitor against cultured Trypanosoma brucei brucei and Trypanosoma brucei rhodesiense cells with ED50 values of 0.025 and 0.0026 muM, respectively. Furthermore introducing a second imidazole group into 23 led to 31, which showed the highest inhibition activity against the parasite with an ED50 of 0.0015 muM. The potency of the TbPFT inhibitors and the cytotoxicity of the corresponding esters to T. brucei cells were shown to be highly correlated. These studies validate TbPFT as a target for the development of novel therapeutics against African sleeping sickness.
Design and Synthesis of Peptidomimetic Protein Farnesyltransferase Inhibitors as Anti-Trypanosoma brucei Agents
摘要:
On the basis of the structure of the CVIM tetrapeptide substrate of mammalian protein farnesyltransferase, a series of imidazole-containing peptidomimetics was designed and synthesized, and their inhibition activity against Trypanosoma brucel protein farnesyltransferase (TbPFT) was evaluated. Peptidomimetics where the 5-position of the imidazole ring was linked to the hydrophobic scaffold showed over 70% inhibition activity at 50 nM in the enzyme assay, whereas the corresponding C-4 regioisomers were less potent. The ester prodrug 23 was found to be a potent inhibitor against cultured Trypanosoma brucei brucei and Trypanosoma brucei rhodesiense cells with ED50 values of 0.025 and 0.0026 muM, respectively. Furthermore introducing a second imidazole group into 23 led to 31, which showed the highest inhibition activity against the parasite with an ED50 of 0.0015 muM. The potency of the TbPFT inhibitors and the cytotoxicity of the corresponding esters to T. brucei cells were shown to be highly correlated. These studies validate TbPFT as a target for the development of novel therapeutics against African sleeping sickness.
Identification of novel imidazole flavonoids as potent and selective inhibitors of protein tyrosine phosphatase
作者:Ling Zhang、Yu Ge、Qing Ming Wang、Cheng-He Zhou
DOI:10.1016/j.bioorg.2019.03.074
日期:2019.7
imidazole flavonoids as new type of proteintyrosinephosphataseinhibitors were synthesized and characterized. Most of them gave potent proteinphosphatase 1B (PTP1B) inhibitory activities. Especially, compound 11a could effectively inhibit PTP1B with an IC50 value of 0.63 μM accompanied with high selectivity ratio (9.5-fold) over T-cell proteintyrosinephosphatase (TCPTP). This compound is cell permeable
Design and Synthesis of Peptidomimetic Protein Farnesyltransferase Inhibitors as Anti-<i>Trypanosoma brucei </i>Agents
作者:Junko Ohkanda、Frederick S. Buckner、Jeffrey W. Lockman、Kohei Yokoyama、Dora Carrico、Richard Eastman、Kate de Luca-Fradley、Wendy Davies、Simon L. Croft、Wesley C. Van Voorhis、Michael H. Gelb、Saïd M. Sebti、Andrew D. Hamilton
DOI:10.1021/jm030236o
日期:2004.1.1
On the basis of the structure of the CVIM tetrapeptide substrate of mammalian protein farnesyltransferase, a series of imidazole-containing peptidomimetics was designed and synthesized, and their inhibition activity against Trypanosoma brucel protein farnesyltransferase (TbPFT) was evaluated. Peptidomimetics where the 5-position of the imidazole ring was linked to the hydrophobic scaffold showed over 70% inhibition activity at 50 nM in the enzyme assay, whereas the corresponding C-4 regioisomers were less potent. The ester prodrug 23 was found to be a potent inhibitor against cultured Trypanosoma brucei brucei and Trypanosoma brucei rhodesiense cells with ED50 values of 0.025 and 0.0026 muM, respectively. Furthermore introducing a second imidazole group into 23 led to 31, which showed the highest inhibition activity against the parasite with an ED50 of 0.0015 muM. The potency of the TbPFT inhibitors and the cytotoxicity of the corresponding esters to T. brucei cells were shown to be highly correlated. These studies validate TbPFT as a target for the development of novel therapeutics against African sleeping sickness.