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MT-1 MitoMP Detection Kit

$280.00

∼ Features ∼
・Applicable to live cells and fixation after staining
・Monitoring of mitochondrial membrane potential
・Highly sensitive detection of changes in mitochondrial membrane potential

Content:
MT-1 Dye 20 µL x 3
Imaging Buffer (10x) 11 ml x 1

The general number of usable assays per 1 set
35 mm dish x 30

Storage Condition: Store at -20 oC
Shipping Condition: Ambient Temperature

Mitochondria Product Selection Guide
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DescriptionQ & AManualS.D.S
Product Description
Mitochondria is an important organelle that uses oxygen to synthesize ATP, producing the necessary energy for living cells to thrive1). Decreased mitochondrial activity and mitochondrial dysfunction are associated with cancer, aging, and neurodegenerative diseases such as Alzheimer’s and Parkinson’s disease2,3). Therefore, mitochondrial membrane potential (MMP) has been widely studied as a promising target for mitochondria-related diseases.

Reference
1) K. F. Ferri, et al., J. Exp. Med., 2000, 192, 1081.
2) N. Matsuda, et al., J. Cell Biol., 2010, 189, 211.
3) J. L. Wang, et al., PNAS, 2000, 97, 7124.


Overcome three limitations of conventional reagents
JC-1 dye, TMRE, and TMRM are widely used to monitor MMP, however, these dyes have some limitations, such as low photostability and poor retention after aldehyde fixation. These limitations result in poor reproducibility of experiments.
Dojindo’s MT-1 MitoMP Detection Kit overcomes these limitations. In addition, the Imaging Buffer included in this kit minimizes background fluorescence and maintains cell vitality while the assay is being performed.

 

① Applicable to fixation after staining
Since mitochondrial membrane potential (MMP) fluctuates according to slight changes of cellular status, extreme care has been needed to obtain repeatable data. In JC-1 dye, which is widely used for measuring the MMP, the fluorescence is lost after a cell has been fixed; therefore, the use of living cells is necessary for the quick measurement of MMP.
In the meantime, the MT-1 dye, which remains unquenched even in the cells fixed with paraformaldehyde after staining, can be used to conduct a highly repeatable experiment.


<Detection Condition>
Ex: 530-560 nm, Em: 570-640 nm
Scale bar: 100 μm
HeLa cells

 

② Allow to monitor mitochondrial membrane potential

 

<Detection Condition>
Ex: 530-560 nm, Em: 570-640 nm
Scale bar: 100 μm
HeLa cells

 

③ High sensitivity for mitochondrial membrane potential
Sometimes it is difficult to detect slight changes of MMP in JC-1 stained mitochondria. In such a case, tetramethylrhodamine ethyl ester (TMRE) was used to monitor MMP. MT-1 can provide equivalent detection sensitivity to TMRE.


<Detection Condition>
Ex: 530-560 nm, Em: 570-640 nm
HeLa cells

 


Reagent Comparison

Citation Fixation Sensitivity Monitoring Instrument Detection
JC-1

x x green Ex :450-490 nm
Em:500-550 nm
red Ex :530-560 nm
Em:570-640 nm
MT-1

red Ex :530-560 nm
Em:570-640 nm
TMRE

x

x red Ex :530-560 nm
Em:570-640 nm

 


Procedure

 


Experimental Example: Depolarization
HeLa cells were treated with a depolarizing agent, carbonyl cyanide-p-trifluoromethoxyphenylhydrazone (FCCP), and changes in mitochondrial membrane potential were observed in a time-lapse imaging with this kit.
As a result, it was confirmed that the mitochondrial membrane potential of the cells treated with FCCP decreased.

 

Experimental Example: Changes in mitochondrial membrane potential in apoptosis-induced cells
Apoptosis was induced by Etoposide to HL60 cells stained with MT-1 in advance, then co-stained with Annexin V-FITC and analyzed by flow cytometry.
Apoptotic progress and MMP change were confirmed through the fluorescence intensity changes of Annexin V-FITC (an increase in the green fluorescence intensity) and MT-1 (a decrease in the red fluorescence intensity), respectively.

<Detection Condition>
Annexin V-FITC (green): Ex. 488 nm / Em. 500 – 560 nm
Mitochondria membrane potential (MT-1, red): Ex 488 nm / Em 564-604 nm

 

Are there any tips for successful time-lapse imaging?
Please minimize the excitation light and increase the detection sensitivity.
Intermittent exposure of cells to excitation light may cause cell damage and degradation of the fluorescent dye, please optimize the interval time.

Is it possible to fixed cells after staining with MT-1?
Cells should be fixed with 4% paraformaldehyde (PFA), and cannot be used with detergents (Triton X-100, NP-40 etc.) because this step may induce leakage of the dye from the cells.

Is it possible to stain cells after fixation?
Since MT-1 accumulates in mitochondria depending on the mitochondrial membrane potential, it is not applicable for staining after fixation.

Are there any experimental example as a positive control when comparing fluorescence intensities?
As a positive control, an example of an experiment using FCCP (carbonylcyanide-p-trifluoromethoxyphenylhydrazone) can be found in the Technical Manual.

What concentration of MT-1 Dye should be used when optimize staining conditions?
The concentration of MT-1 Dye is recommended to be diluted 1000 times. but please refer to the following when optimizing the staining conditions.
<Fluorescence intensity is weak>
Please optimize the following concentration: between 500-1,000 times dilution.
<Non-specific adsorption is observed>
Please optimize the following concentration: between 1,000 and 2,000 times dilution.

Can I use buffer for the preparation of MT-1 working solution?
Hanks’ HEPES and HBSS can be used. It can also be prepared using MEM, RPMI and MEM with 10 % FBS.

Is it possible to observe after the addition of MT-1 working solution without washing step?
After staining, the samples can be observed without washing step.
However, we don’t recommend observing them for long term visualization without washing step because of the possibility of cytotoxicity.
We recommend to remove the supernatant and replace it with the medium.

Is it possible to use PBS in place of HBSS for washing after staining with MT-1?
We recommend the use of HBSS to reduce the cell damage.
If you do not have HBSS, we recommend washing the cells with medium.

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Intracellular Fluorescent Probes Mitochondria Research

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