Nutrients Modulate T1r2 Transcript Levels in MIN 6 and Primary Cultured Taste Buds Cells under High Glucose Condition

The sweet taste receptors comprised of T1r2 and T1r3, sense glucose concentrations in the gastrointestine. While hyperglycemia was reported to decrease the T1R2 and T1R3 tanscript levels in healthy subjects, no change was observed in type 2 diabetes patients. We investigated which glucose level and nutrients affect those transcript levels in MIN 6 and primary cultured taste buds cells using quantitative Reverse Trancription Polymerase Chain Reaction. High glucose diminished T1r2 transcript levels in MIN 6 and primary cultured taste buds cells. Resveratrol and its analogue augmented transcript levels of T1r1 and T1r2 above normal levels in MIN 6 cells in the medium with 25 mM glucose. Adenine, but not guanine, augmented T1r2 transcript levels of MIN 6 cells in the medium with 25 mM glucose. These results imply that nutrients in meals could affect sweet taste sensitivity by modulating T1r2 transcript levels in response to blood glucose levels.

高效液相色谱法测定阴泰洗液中替硝唑的含量

目的 :建立测定阴泰洗液中替硝唑含量的高效液相色谱方法。方法 :以Nova-PakC18 为色谱柱 ,甲醇 -水 -冰醋酸 (22∶78∶0.1)为流动相 ,甲硝唑为内标 ,检测波长为310nm。结果 :替硝唑在20～100μg/ml浓度范围内线性关系良好 (r=0 9999) ;平均回收率为101.2 % (n=5) ,RSD=1 22 %。结论 :本方法简便、快速 ,测定结果准确 ,重现性好。