四氢尿苷

中文名称:

四氢尿苷

中文同义词:

四氢尿苷;胞苷脱氨酶(CDA)抑制剂(TETRAHYDROURIDINE);3,4,5,6-TETRAHYDROURIDINE (>80%);尿苷杂质27(四氢尿苷)

英文名称:

Tetrahydrouridine

英文同义词:

3,4,5,6-tetrahydrouridine;nsc-112907;nsc-112907-d;tetrahydro-4-hydroxy-1-beta-d-ribofuranosyl-2(1h)-pyrimidinon;TETRAHYDROURIDINE;3,4,5,6-Tetrahydrouridine (>80% by HPLC);Uridine, 3,4,5,6-tetrahydro-;(4S)-3,4,5,6-Tetrahydro-4β-hydroxy-1-(β-D-ribofuranosyl)pyrimidin-2(1H)-one

CAS号:

18771-50-1

分子式:

C9H16N2O6

分子量:

248.23

EINECS号:

相关类别:

细胞生物学试剂;高纯试剂;化工原料

Mol文件:

18771-50-1.mol

沸点 

668.6±55.0 °C(Predicted)

密度 

1.622±0.06 g/cm3(Predicted)

储存条件 

Keep in dark place,Sealed in dry,2-8°C

酸度系数(pKa)

12.50±0.40(Predicted)

生物活性

Tetrahydrouridine dihydrate (THU dihydrate) 是一种有效的胞苷脱氨酶 (CDA) 抑制剂，竞争性阻断酶的活性位点。

靶点

cytidine deaminase (CDA)

体外研究

Tetrahydrouridine (THU) is a specific inhibitor of cytidine deaminase (CDA) which can suppress deamination in the catabolism of cytotoxic deoxycytidine analogues like ara-C and Gemcitabine. To test how Tetrahydrouridine affects the Gemcitabine-mediated anti-neoplastic effect on pancreatic and lung carcinoma cells, a combination therapy is performed. As expected, high CDA expression in BxPC-3 and H441 results in improved Gemcitabine sensitivity after a 100 µM Tetrahydrouridine treatment. The sensitivity of BxPC-3 and H441 cell lines increases by as much as approximately 2.1 and 4.4 fold respectively. On the other hand, MIAPaCa-2 and H1299 cells unexpectedly become more sensitive to Gemcitabine with low CDA expression. MIAPaCa-2 and H1299 cells show a change in IC 50 of 2.2 and 2.3 fold respectively. However, Panc-1 and H322 cells do not show significant changes in drug sensitivity. These data suggested that Tetrahydrouridine can sensitize some pancreatic and lung carcinoma cells to Gemcitabine-induced cell death regardless of CDA expression levels. Tetrahydrouridine inhibits S-phase without apoptosis.

体内研究

Administration of 167 mg/kg Tetrahydrouridine (THU) followed by 1.0 mg/kg DAC results in death in one male and eight females. Animals surviving to scheduled termination are generally asymptomatic with no treatment related effects observed in body weights, food consumption, clinical chemistry and urinalysis for a treatment up to 1.0 mg/kg DAC in combination with 167 mg/kg Tetrahydrouridine in animals.