中国生化药物杂志
中國生化藥物雜誌
중국생화약물잡지
CHINESE JOURNAL OF BIOCHEMICAL PHARMACEUTICS
2015年
4期
154-157
,共4页
蒋昆谕%周一平%马颖林%周昱%张懋%孟胜男
蔣昆諭%週一平%馬穎林%週昱%張懋%孟勝男
장곤유%주일평%마영림%주욱%장무%맹성남
白杨素%SULT1A3%人小肠S9%磺酸化结合反应
白楊素%SULT1A3%人小腸S9%磺痠化結閤反應
백양소%SULT1A3%인소장S9%광산화결합반응
chrysin%SULT1A3%human small intestine S9%sulfation
目的:研究白杨素分别与人重组酶SULT1A3和人小肠S9(human small intestine S9,HSI S9)孵育体系磺酸化结合反应的代谢特性。方法采用高效液相色谱法,测定白杨素及其代谢产物,并应用LC-MS/MS液质联用技术鉴定其结构。分别建立白杨素与重组酶SULT1A3及与人小肠S9的反应体系,测定不同浓度的白杨素在不同酶反应中的代谢速率。结果白杨素与SULT1A3及人小肠S9孵育体系反应的代谢产物均为单磺酸化结合产物。白杨素与重组酶SULT1A3及人小肠S9的酶反应均呈双相动力学特征。白杨素与SULT1A3酶反应的动力学参数Km为(3.06±1.04)、(0.41±0.06)μM,Vmax为(12.13±1.30)、(6.72±1.61) nmol/(min· mg),Vmax/Km为3.96、16.39 mL/(min· mg)。白杨素与人小肠S9的酶反应的动力学参数Km为(1.92±0.35)、(0.01±0.00)μM,Vmax为(0.52±0.02)、(0.08±0.02)nmol/(min· mg),Vmax/Km为0.27、8.00 mL/(min· mg)。重组酶SULT1A3和人小肠S9分别介导的白杨素磺酸化结合反应的代谢呈现显著的相关性( R2=0.985)。结论 SULT1A3在白杨素的肠道代谢中发挥主导作用,小肠可能是白杨素的主要代谢器官。
目的:研究白楊素分彆與人重組酶SULT1A3和人小腸S9(human small intestine S9,HSI S9)孵育體繫磺痠化結閤反應的代謝特性。方法採用高效液相色譜法,測定白楊素及其代謝產物,併應用LC-MS/MS液質聯用技術鑒定其結構。分彆建立白楊素與重組酶SULT1A3及與人小腸S9的反應體繫,測定不同濃度的白楊素在不同酶反應中的代謝速率。結果白楊素與SULT1A3及人小腸S9孵育體繫反應的代謝產物均為單磺痠化結閤產物。白楊素與重組酶SULT1A3及人小腸S9的酶反應均呈雙相動力學特徵。白楊素與SULT1A3酶反應的動力學參數Km為(3.06±1.04)、(0.41±0.06)μM,Vmax為(12.13±1.30)、(6.72±1.61) nmol/(min· mg),Vmax/Km為3.96、16.39 mL/(min· mg)。白楊素與人小腸S9的酶反應的動力學參數Km為(1.92±0.35)、(0.01±0.00)μM,Vmax為(0.52±0.02)、(0.08±0.02)nmol/(min· mg),Vmax/Km為0.27、8.00 mL/(min· mg)。重組酶SULT1A3和人小腸S9分彆介導的白楊素磺痠化結閤反應的代謝呈現顯著的相關性( R2=0.985)。結論 SULT1A3在白楊素的腸道代謝中髮揮主導作用,小腸可能是白楊素的主要代謝器官。
목적:연구백양소분별여인중조매SULT1A3화인소장S9(human small intestine S9,HSI S9)부육체계광산화결합반응적대사특성。방법채용고효액상색보법,측정백양소급기대사산물,병응용LC-MS/MS액질련용기술감정기결구。분별건립백양소여중조매SULT1A3급여인소장S9적반응체계,측정불동농도적백양소재불동매반응중적대사속솔。결과백양소여SULT1A3급인소장S9부육체계반응적대사산물균위단광산화결합산물。백양소여중조매SULT1A3급인소장S9적매반응균정쌍상동역학특정。백양소여SULT1A3매반응적동역학삼수Km위(3.06±1.04)、(0.41±0.06)μM,Vmax위(12.13±1.30)、(6.72±1.61) nmol/(min· mg),Vmax/Km위3.96、16.39 mL/(min· mg)。백양소여인소장S9적매반응적동역학삼수Km위(1.92±0.35)、(0.01±0.00)μM,Vmax위(0.52±0.02)、(0.08±0.02)nmol/(min· mg),Vmax/Km위0.27、8.00 mL/(min· mg)。중조매SULT1A3화인소장S9분별개도적백양소광산화결합반응적대사정현현저적상관성( R2=0.985)。결론 SULT1A3재백양소적장도대사중발휘주도작용,소장가능시백양소적주요대사기관。
Objective To investigate the metabolic profile of chrysin in SULT1A3 and human small intestine S9.Methods After incubation of chrysin using in vitro SULT1A3 and human small intestine S9 system, high-performance liquid chromatography was utilized to determine the sulfates of chrysin.Mass spectrum(MS) were employed to elucidate the structures of metabolite.Results In the SULT1A3 with PAPS, Km were (3.06 ±1.04) and (0.41±0.06) μM, Vmax were (12.13 ±1.30) and (6.72 ±1.61) nmol/(min· mg), Vmax/Km were 3.96 and 16.39 mL/(min· mg), respectively.In the human small intestine S9 with PAPS, Km were (1.92 ±0.35) and (0.01 ±0.00) μM, Vmax were (0.52 ±0.02) and (0.08 ± 0.02) nmol/(min· mg), Vmax/Km were 0.27 and 8.00 mL/(min· mg).The metabolic behavior of chrysin in SULT1A3 and human small intestine S9 both were followed biphasic kinetics.The sulfation of chrysin in SULT1A3 showed a significant correlation with that in human small intestine S9(R2 =0.985).Conclusion The result indicates that SULT1A3 is the major enzyme to the metabolism of chrysin, human small intestine may be the main metabolic organs of chrysin.