MOM

Guide (The following is our recommended protocol. This protocol is for guidance only and should be modified according to your specific needs).

1. Stock Solution Preparation
1.1 Solvent: Water, DMSO; alternatively, MOM can be fabricated as a solid structure via vacuum deposition without a solvent.
1.2 Concentration recommendation: 10 mM, 30 μM, 100 μM; no concentration specified for vacuum-deposited solid MOM structures.

2. Working Solution Preparation
2.1 Diluent: Cell culture medium, PBS buffer, deionized water.
2.2 Working concentration: 0.05 μM, 0.5 μM, 1 μM, 5 μM, 10 μM, 30 μM for cell or environmental sample assays; 1 mM for in vivo tumor imaging.
2.3 Note: Adjust working solution concentration as needed; prepare fresh before use.

3. Staining Procedure
3.1 For adherent cells[1]:
3.1.1 Sample type: HeLa, HepG2, A549, U87-MG, HEK293T, LO2 cells.
3.1.2 Incubation conditions: Incubate with MOM working solution at 37°C for 20 min; wash-free process.
3.1.3 Washing steps: No washing required.
3.2 For suspension cells[1]:
3.1.1 Sample type: RAW264.7 cells.
3.1.2 Incubation conditions: Incubate with MOM working solution at 37°C for 20 min; wash-free process.
3.1.3 Washing steps: No washing required.
3.3 For in vivo tumor and normal tissue samples[1]:
3.1.1 Sample type: A549-tumor-bearing BALB/c-Nude mice tumor and normal tissue.
3.1.2 Incubation conditions: Inject 100 μL of 1 mM MOM in PBS buffer (pH=7.4) intramuscularly at tumor area and normal right thigh.
3.1.3 Washing steps: No washing step specified.
3.4 For environmental aqueous samples[3]:
3.1.1 Sample type: Deionized water, lake water, river water, sea water, tap water, bottled drinking water.
3.1.2 Incubation conditions: Incubate with 10 μM MOM solution at 25°C for 60 min.
3.1.3 Washing steps: No washing steps specified.
3.5 For environmental paper strip samples[3]:
3.1.1 Sample type: Paper strips.
3.1.2 Incubation conditions:
3.1.2.1 For liquid assay: Soak MOM-pretreated paper in 100 mM hydrazine solution for 1 s, then air-dry at 25°C for 1 min.
3.1.2.2 For vapor assay: Expose MOM-pretreated paper to hydrazine vapor at ~100°C for 30 s.
3.1.3 Washing steps: No washing steps specified.
3.6 For environmental soil samples[3]:
3.1.1 Sample type: Soil samples.
3.1.2 Incubation conditions: Incubate soils with 100 mM hydrazine solution at 25°C for 1 min, then apply MOM solution.
3.1.3 Washing steps: No washing steps specified.

4. Controls
4.1 For cell membrane polarity change assays[1]: Set up HeLa cells without methyl-β-cyclodextrin (MβCD) treatment as a control.
4.2 For normal vs cancer cell discrimination[1]: Include normal cell lines (HEK293T, RAW264.7, LO2) as negative controls and cancer cell lines (A549, HeLa, HepG2, U87-MG) as positive samples.
4.3 For in vivo tumor imaging[1]: Use normal BALB/c-Nude mice as a negative control.

5. Detection & Analysis
5.1 Instrument type:
5.1.1 For cell imaging[1]: Confocal laser scanning microscope.
5.1.2 For in vivo imaging[1]: Small animal fluorescence imager.
5.1.3 For flow cytometry analysis[1]: Flow cytometer.
5.2 Ex/Em wavelengths:
5.2.1 For cell imaging (MOM fluorescence)[1]: Ex=488 nm, Em=570−630 nm; for DiO colocalization imaging[1]: Em=500−540 nm.
5.2.2 For in vivo imaging[1]: Ex=460 nm, Em=600 nm.
5.2.3 For flow cytometry analysis[1]: Ex=488 nm, Em=585±40 nm.
5.2.4 For environmental sensing[3]: Ex=338 nm, Em=495 nm; visual detection under 365 nm UV light.
5.3 Result analysis:
5.3.1 For cell assays[1]: MOM specifically localizes to cell membranes, with no fluorescence in nucleus or cytoplasm; cancer cell membranes show strong red fluorescence, while normal cell membranes show very weak red fluorescence; MβCD-treated HeLa cells show decreased membrane fluorescence compared to untreated cells.
5.3.2 For in vivo assays[1]: Tumor tissue shows intense fluorescence, while normal tissue shows weak fluorescence; red fluorescence is emitted from targeted tumor tissue.

MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.