样品操作及分析
以下方案仅提供指导,实际情况应根据您的特定需求进行修改。
使用AMC,AFC,pNA,R110和ProRed底物检测胱天蛋白酶的常规方案
1.在DMSO中准备10 mM的储备溶液。
2.如下准备2X半胱天冬酶底物(50 µM)分析溶液:50 µL底物原液,100 µL DTT(1M),400 µL EDTA(100 mM),10 mL Tris Buffer(20 mM),pH = 7.4。
3.将等体积的半胱天冬酶标准品或样品与2X半胱天冬酶底物测定溶液混合,并在室温下孵育至少1小时。
4.使用荧光酶标仪监测荧光,或使用酶标仪监测吸光度。
使用细胞渗透性FMK Caspase探针检测细胞Caspase的方案
1.在DMSO中准备2-5 mM的储备溶液。
2.根据需要处理细胞。
3.通过用20 mM Hepes缓冲液(HHBS)在Hanks中稀释DMSO储备溶液(来自步骤2.1),制备2X渗透性半胱天冬酶底物(20 µM)分析溶液。
4.将等体积的处理过的细胞与2X半胱天冬酶底物测定溶液混合(来自步骤2.3),并在37°C,5%CO2的培养箱中孵育细胞至少1小时。
5.用HHBS清洗细胞至少一次。
6.通过流式细胞仪,荧光显微镜或荧光酶标仪监测荧光强度。
使用细胞渗透性FMK Caspase探针进行细胞半胱天冬酶测定(仅适用于#13470-13476)
1.通过向小瓶中加入50 µL DMSO制备250X储备液。
2.根据需要处理细胞。
3.以1:250的比例将250 X DMSO储备溶液添加到细胞溶液中(例如2 µL至500 µL细胞),并将细胞在37°C,5%CO2的培养箱中孵育1小时。
4.用HHBS清洗细胞至少一次。
5.通过流式细胞仪,荧光显微镜或荧光酶标仪监测荧光强度。
参考文献
Suppression of human T cell proliferation by the caspase inhibitors, z-VAD-FMK and z-IETD-FMK is independent of their caspase inhibition properties
Authors: Lawrence CP, Chow SC.
Journal: Toxicol Appl Pharmacol. (2012)
[Inhibition of elicitation of allergic contact dermatitis by topical use of Z-VAD-FMK, a broad caspase inhibitor: experiment in mice]
Authors: Li YY, Yan CL.
Journal: Zhonghua Yi Xue Za Zhi (2012): 1992
Intracochlear perfusion of leupeptin and z-VAD-FMK: influence of antiapoptotic agents on gunshot-induced hearing loss
Authors: Abaamrane L, Raffin F, Schmerber S, Sendowski I.
Journal: Eur Arch Otorhinolaryngol (2011): 987
Plasmodium falciparum metacaspase PfMCA-1 triggers a z-VAD-fmk inhibitable protease to promote cell death
Authors: Meslin B, Beavogui AH, Fasel N, Picot S.
Journal: PLoS One (2011): e23867
Structure of human caspase-6 in complex with Z-VAD-FMK: New peptide binding mode observed for the non-canonical caspase conformation
Authors: Muller I, Lamers MB, Ritchie AJ, Dominguez C, Munoz-Sanjuan I, Kiselyov A.
Journal: Bioorg Med Chem Lett (2011): 5244
Pretreatment with pancaspase inhibitor (Z-VAD-FMK) delays but does not prevent intraperitoneal heat-killed group B Streptococcus-induced preterm delivery in a pregnant mouse model
Authors: Equils O, Moffatt-Blue C, Ishikawa TO, Simmons CF, Ilievski V, Hirsch E.
Journal: Infect Dis Obstet Gynecol (2009): 749432
[Attenuation of allergic contact dermatitis by Z-VAD-FMK, a broad caspase inhibitor: experiment with mice]
Authors: Li YY, Yan CL, Xu W.
Journal: Zhonghua Yi Xue Za Zhi (2008): 3153
Bodipy-VAD-Fmk, a useful tool to study yeast peptide N-glycanase activity
Authors: Witte MD, Descals CV, de Lavoir SV, Florea BI, van der Marel GA, Overkleeft HS.
Journal: Org Biomol Chem (2007): 3690
Caspase inhibitor Z-VAD-FMK enhances the freeze-thaw survival rate of human embryonic stem cells
Authors: Heng BC, Clement MV, Cao T.
Journal: Biosci Rep (2007): 257
Effects of caspase inhibitors (z-VAD-fmk, z-VDVAD-fmk) on Nile Red fluorescence pattern in 7-ketocholesterol-treated cells: investigation by flow cytometry and spectral imaging microscopy
Authors: Vejux A, Lizard G, Tourneur Y, Riedinger JM, Frouin F, Kahn E.
Journal: Cytometry A (2007): 550
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