样品实验方案
简要概述
1.准备测试样品和连续稀释的α-酮戊二酸标准品(50μL)
2.加入等体积的α-酮戊二酸工作液(50μL)
3.在37°C孵育60-90分钟
4.监测570nm处的吸光度强度
溶液制备
1.储备溶液
所有未使用的储备溶液应分成一次性等分试样,并在制备后储存在-20°C。避免反复冻融循环。
1.1 Amplite 红色储备液(200X):
将50μLDMSO(组分E)加入到Amplite Red(组分A)的小瓶中以制备200X储备溶液。
2.标准溶液
2.1α-酮戊二酸标准
将10μL10mMα-酮戊二酸标准品(组分D)加入990μLPBS中,得到100μMα-酮戊二酸标准溶液(AKG7)。 然后进行1:2连续稀释以获得连续稀释的α-酮戊二酸标准品(AKG6-AKG1)。
3.工作溶液
3.1将5 mL测定缓冲液(组分C)加入一个酶混合物1瓶(组分B1)中并充分混合。
3.2将100μLDdH2O加入一个酶混合物2小瓶(组分B2)中并充分混合。
3.3将整个小瓶(100μL)的酶混合物2和25μL的200X Amplite Red储备溶液转移到小瓶混合物1的小瓶中并充分混合以制备α-酮戊二酸的工作溶液。 注意:5mLα-酮戊二酸工作溶液足以容纳一个96孔板。 它不稳定,请及时使用。
样品分析
表1.实心黑色96孔微孔板中α-酮戊二酸标准品和测试样品的布局。 AKG =α-酮戊二酸标准品(AKG1-AKG7,0.1至30μM),BL =空白对照,TS =测试样品。
BL |
BL |
TS |
TS |
AKG1 |
AKG1 |
… |
… |
AKG2 |
AKG2 |
… |
… |
AKG3 |
AKG3 |
|
|
AKG4 |
AKG4 |
|
|
AKG5 |
AKG5 |
|
|
AKG6 |
AKG6 |
|
|
AKG7 |
AKG7 |
|
|
表2.每个孔的试剂组成
孔 |
容积 |
试剂 |
AKG1-AKG7 |
50ul |
连续稀释液(0.1至30μM) |
BL |
50ul |
分析缓冲液(组分C) |
TS |
50ul |
测试样品 |
1.根据表1和2中提供的布局制备α-酮戊二酸标准品(AKG),空白对照(BL)和测试样品(TS)。对于384孔板,每孔使用25μL试剂代替50μL。
2.向α-Ketoglutarate标准品,空白对照和测试样品的每个孔中加入50μLα-酮戊二酸测定工作溶液,使总测定体积为100μL/孔。 对于384孔板,在每个孔中加入25μLα-酮戊二酸工作溶液,总体积为50μL/孔。
3.将反应在37℃孵育30-60分钟。
4.用Ex / Em = 540 / 590nm(截止值= 570nm)的荧光板读数器监测荧光增加。
参考文献
Dietary alpha-ketoglutarate promotes higher protein and lower triacylglyceride levels and induces oxidative stress in larvae and young adults but not in middle-aged Drosophila melanogaster
Authors: Bayliak MM, Lylyk MP, Shmihel HV, Sorochynska OM, Semchyshyn OI, Storey JM, Storey KB, Lushchak VI.
Journal: Comp Biochem Physiol A Mol Integr Physiol (2017): 28
Loss of Nardilysin, a Mitochondrial Co-chaperone for alpha-Ketoglutarate Dehydrogenase, Promotes mTORC1 Activation and Neurodegeneration
Authors: Yoon WH, Sandoval H, Nagarkar-Jaiswal S, Jaiswal M, Yamamoto S, Haelterman NA, Putluri N, Putluri V, Sreekumar A, Tos T, Aksoy A, Donti T, Graham BH, Ohno M, Nishi E, Hunter J, Muzny DM, Carmichael J, Shen J, Arboleda VA, Nelson SF, Wangler MF, Karaca E, Lupski JR, Bellen HJ.
Journal: Neuron (2017): 115
The facial triad in the alpha-ketoglutarate dependent oxygenase FIH: A role for sterics in linking substrate binding to O2 activation
Authors: Hangasky JA, Taabazuing CY, Martin CB, Eron SJ, Knapp MJ.
Journal: J Inorg Biochem (2017): 26
alpha-Ketoglutarate Accelerates the Initial Differentiation of Primed Human Pluripotent Stem Cells
Authors: TeSlaa T, Chaikovsky AC, Lipchina I, Escobar SL, Hochedlinger K, Huang J, Graeber TG, Braas D, Teitell MA.
Journal: Cell Metab (2016): 485
Alpha-Ketoglutarate as a Molecule with Pleiotropic Activity: Well-Known and Novel Possibilities of Therapeutic Use
Authors: Zdzisinska B, Zurek A, Kandefer-Szerszen M.
Journal: Arch Immunol Ther Exp (Warsz). (2016)
alpha-Ketoglutarate dehydrogenase complex moonlighting: ROS signalling added to the list: An Editorial highlight for ‘Reductions in the mitochondrial enzyme alpha-ketoglutarate dehydrogenase complex in neurodegenerative disease – beneficial or detrimental?’
Authors: Fernandez E, Bolanos JP.
Journal: J Neurochem (2016): 689
Alpha-ketoglutarate enhances milk protein synthesis by porcine mammary epithelial cells
Authors: Jiang Q, He L, Hou Y, Chen J, Duan Y, Deng D, Wu G, Yin Y, Yao K.
Journal: Amino Acids (2016): 2179
alpha-ketoglutarate is associated with delayed wound healing in diabetes
Authors: Tan Q, Wang W, Yang C, Zhang J, Sun K, Luo HC, Mai LF, Lao Y, Yan L, Ren M.
Journal: Clin Endocrinol (Oxf) (2016): 54
Alpha-ketoglutarate promotes skeletal muscle hypertrophy and protein synthesis through Akt/mTOR signaling pathways
Authors: Cai X, Zhu C, Xu Y, Jing Y, Yuan Y, Wang L, Wang S, Zhu X, Gao P, Zhang Y, Jiang Q, Shu G.
Journal: Sci Rep (2016): 26802
Alpha-ketoglutarate reduces ethanol toxicity in Drosophila melanogaster by enhancing alcohol dehydrogenase activity and antioxidant capacity
Authors: Bayliak MM, Shmihel HV, Lylyk MP, Storey KB, Lushchak VI.
Journal: Alcohol (2016): 23
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