PMF

 

Fluorescent Formaldehyde Detection Kit (Cell Permeable)

 

Traditionally, formaldehyde (FA) has been viewed as an environmental hazard and a toxic carcinogen for mammals. However, FA is produced in mammalian cells via enzymatic pathways and used in the “one carbon cycle” to make building blocks for life such as DNA and certain amino acids. This ‘one carbon cycle’ is fundamental to all forms of life down to the bacterial cell (1-6). FA is maintained in homeostasis in living cells, however its breakdown and over production has been implicated in the pathogenesisof various diseases such as cancer, dementia, diabetes and Alzheimer’s disease (7-11).

Cell Technology introduces two ultra-fast reversible probes, developed by Dr. Xin Li et al, PMF and PMF4 for the detection of FA in living cells or aqueous samples (12,13). These quenched fluorogenic probes when exposed to FA become fluorescent: Ex 320-420nm Em: 520-560mm. PMF4 is especially useful in in-situ visualization of FA in cellular lysosomes.

 

1.  Key Benefits

•   Probe PMF: In-situ monitoring of Formaldehyde (FA) in the cytoplam 

•   Probe PMF4: In-situ monitoring of Formaldehyde (FA) in lysosomes 

•   Study of FA levels in cellular stress, diseases such as Alzhimers and cancer 

•   Reversible probe monitoring FA homeostasis in live cells and tissue sections 

•   FA detection in Bacterial, fungal and plant cells 

•   Environmental samples. 

 

 

2. Assay Principle 

 

PMF and PMF4 are quenched fluorogenic probes and when exposed to FA become fluorescent: These probes are extremely useful for continuous in-situ monitoring of FA in live cells or live tissue sections. Ex 320-420nm Em: 520-560mm. PMF4 is especially useful in in-situ visualization of FA in cellular lysosomes.

 

Reaction: 

1.  PMF/PMF4 Non-Fluorescent Dye + Formaldehyde → Fluorescent Analog 

    Excitation: 320-420nm and Emission at 520-560nm. Flow Cytometery /Fluorescent Microscope Ex: 488  Em: 520-560nm. 

 

 

Figure. Photophysical responses of PFM to FA. (A) PFM (20 μM) was treated with various amounts of FA for 5 min, and then the UV−vis spectra were recorded. (B) Fluorescent spectra of PFM (10 μM) after the treatment of various concentrations of FA for 5 min. (C) Reaction time course of PFM (10 μM) with FA (10, 100, 200, 400 μM). (D) Fluorescent responses of PFM (10 μM) toward various analytes (300 μM) after a reaction time of 30 min without (black) or with (red) the presence of FA (300 μM). The analytes tested were PFM blank (1), acetaldehyde (2), malonaldehyde (3), ascorbic acid (4), glucose (5), glucosone (6), oxalic acid (7), pyruvate (8), methylglyoxal (9), glyoxal (10), p-methoxybenzaldehyde (11), trichloroacetaldehyde (12), p-nitrobenzaldehyde (13), acetone (14), HClO (15), H2O2 (16), GSH (17). For C and D, F represents the fluorescent intensity of PFM at 500 nm after the treatment of FA for various time or after the treatment of various analytes, and F0 represents the intensity of blank PFM solution at 500 nm. All data were collected in PBS (pH 7.4, 10 mM) at ambient temperature with λex 451 nm. 

 

 

3.  Applications

 

  

Figure. Imaging endogenous FA in live HBMECs. (A) HBMECs treated with PFM (10 μM). (B) HBMECs were pre-treated with NaHSO3 (200 μM) for 30 min, then washed with PBS (pH 7.4) and followed by PFM (10 μM) incubation for 15 min at 37 oC. (C) HBMECs treated with NaHSO3 (200 μM). Nuclei were stained with Hoechst 33342. (D) Quantification of image data. Data are expressed as mean ±S.E.M. A minimum of 3 images for each condition were quantified and averaged. **P<0.01 versus PFM alone. The PFM fluorescence was monitored at 515-545 nm (λex=488 nm). 

 

 

Figure. Sample of Standard curve of formaldehyde titrated in 100mM TRIS buffer pH 7.0. PMF4 added at a concentration of 10μM final concentration per well. The assay plate was incubated for 15 minutes in the dark at room temperature. Ex:360nm and Em: 520nm.  

 

Reagent	Part#	Temperature
PMF: 1 vial	4029	-20°C

Product Data Sheet          Protocol

 

Reference 

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