BODIPY 493/503 中性脂滴荧光探针
| 英文名 | BODIPY 493/503 | CAS号 | 121207-31-6 |
| 产品编号 | FS1358 | 分子式 | C14H17BF2N2 |
| 产品分类 | 荧光探针及染色 | 分子量 | 262.11 |
| 纯度 | 99% (HPLC) | 储存条件 | -20℃ |
产品简介
BODIPY 493/503是一种亲脂性荧光探针,用于生成蛋白质、核苷酸、寡核苷酸和右旋糖酐的荧光结合物,以及制备荧光酶底物、脂肪酸、磷脂、脂多糖、受体配体和聚苯乙烯微球。也可用于固态染料激光器。定位在极性脂上,能用于标记细胞中性脂内容物,特别定位在活细胞和固定细胞的脂滴上。BODIPY 493/503与落射荧光显微镜、共聚焦荧光显微镜和双质子荧光显微镜,以及流式细胞仪兼容。最大激发和发射波长分别是493/503nm,适用于活细胞和固定细胞标记。
产品特性
CAS :121207-31-6
化学名:(T-4)-[2-[1-(3,5-dimethyl-2H-pyrrol-2-ylidene-κN)ethyl]-3,5-dimethyl-1H-pyrrolato-κN]difluoro-boron
同义名:4,4-Difluoro-1,3,5,7,8-Pentamethyl-4-Bora-3a,4a-Diaza-s-Indacene
分子式:C14H17BF2N2
分子量:262.1
纯度:99% (HPLC)
Ex/Em:493/503nm
溶解性:溶于DMSO或无水乙醇
保存与运输方法:-20ºC避光干燥保存,至少2年有效。 运输:冰袋运输。
使用方法:
储存液的制备和保存
1)将低温保存的10mg BODIPY 493/503(Mw:262.1)置于室温回温至少20min,低速离心后加入一定量的无水乙醇或无水DMSO配制成适量浓度的母液,比如5mM(往10mg 粉末加入7.63ml DMSO,充分溶解即可)。根据单次用量将储存液分装,≤-20℃避光干燥保存。需注意溶液内湿度的逐渐积累会随着时间引起探针聚集,从而务必干燥保存储存液。
2)如果想长期保存,可以用无水乙醇溶解粉末,之后分装到小量,之后使用真空泵来挥发掉乙醇。之后置于≤-20℃避光干燥保存。
探针的标记(仅作参考)
由于BODIPY 493/503属于疏水染料,难以快速的分散进入水溶性溶液中,为了能均匀稳定的标记细胞,可参考以下方法标记活细胞。
1) 细胞准备,用1/2体积缓冲液或者培养基来重悬细胞。(如;1ml的细胞,密度为1×106/ml,可调整将1×106个细胞置于0.5ml缓冲液或者培养基内,使其密度为2×106/ml。
2) 用0.5ml的相同缓冲液或者培养基(不含细胞,不含BSA或血清)制备2×BODIPY 493/503,剧烈混匀以乳化此溶液,可涡旋、超声或者手摇晃,之后将此溶液加入细胞内,清请混匀或旋转,使其混匀。
3) 对于贴壁细胞,可轻轻摇晃或用枪上下吹打。
4) 当0.5ml的2×BODIPY 493/503加入0.5ml细胞内,探针最终的染色浓度是1×,且细胞密度为理想的1×106/ml。
5) 探针的工作浓度建议是1-10uM,孵育时间从几分钟到30min.请根据具体应用来优化实验条件。
探针的标记(仅作参考)
由于BODIPY 493/503属于疏水染料,难以快速的分散进入水溶性溶液中,为了能均匀稳定的标记细胞,可参考以下方法标记活细胞。
应用示例
图1. 胞内中性LDs的定量和观察。A,A498细胞在含BSA(0.2%)或含BSA的油酸过夜培养。之后根据流式分析的操作步骤进行BODIPY染色;B,A498细胞在含BSA(0.2%)或含BSA的油酸过夜培养。之后根据荧光分析的操作步骤进行BODIPY染色;
BODIPY staining for flow cytometry
- Grow cells under culture conditions relevant for the study. A 35 mm dish/well is sufficient for the cell numbers required in this assay. For our assays, 50,000 A498 cells in 35 mm well were sufficient.
- Overnight incubation of cells with 30 μM oleic acid can serve as a positive control for increased neutral lipid content, as oleic acid is a potent inducer of triglyceride synthesis and storage. Fatty acid free BSA serves as a control.
- At the time-point of interest, prepare 2 μM BODIPY staining solution in PBS. The volume of staining solution required for each sample corresponds to the volume of media used for culturing cells.
- Wash cells with a quick rinse using 3 ml PBS to remove media/serum.
- Incubate on BODIPY staining solution in the dark for 15 min at 37 °C. Include an unstained control for flow cytometry.
Note: From this point, protect samples from light as much as possible.
- Wash cells with a quick rinse using 3 ml PBS to remove staining solution.
- Trypsinize cells to generate a single cell suspension. For the A498 cell line used in this protocol, cells were incubated with Trypsin-EDTA (0.25%) for 5 min at 37 °C.
- Add 5 ml of PBS and transfer cell suspension to a 15 ml conical tube.
- Pellet cells at 250 × g, 5 min, 4 °C.
- Aspirate supernatant, wash the cell pellet with a quick rinse using 3 ml PBS, and pellet cells at 250 × g, 5 min, 4 °C.
- Carefully aspirate the supernatant and resuspend cells in 300 μl 1× flow cytometry buffer.
- Pass cell suspension through a 35 μm filter into a FACS tube.
- Perform flow cytometry. Obtain a minimum of 10,000 events per condition.
- The investigator can analyze data as mean fluorescence (Figure A) or display the data as a histogram (Figure B).
注意事项
1)探针染料存在淬灭问题,请尽量注意避光,以减缓荧光淬灭。
2)为了您的安全和健康,请穿实验服并戴一次性手套操作。
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