Mem-RhoNox

Operating Instructions
Operating Instructions (The following is a recommended experimental protocol for guidance only, and adjustments are required based on your specific needs).

1. Stock Solution Preparation
1.1 Solvent: DMSO.
1.2 Recommended Concentration: 1 mM.

2. Working Solution Preparation
2.1 Diluent: HBSS.
2.2 Working Concentration: 1 μM.
2.3 Notes: Adjust the working solution concentration as needed; prepare and use immediately.

3. Staining Procedure
3.1 Sample Types^[1]:
3.1.1 Adherent Cells: HepG2 cells.
3.1.3 Primary Cultured Cells: Mouse hippocampal neurons (DIV15).
3.2 Incubation Conditions:
3.2.1 Cell Staining: Incubate with 1 μM working solution for 10 min.
3.3 Washing Step: Wash with HBSS to remove unbound probes.

4. Control Setup
4.1 The following controls are required for HepG2 cell imaging:
4.1.1 Vehicle-only Control: Used to confirm the stability of the probe under basal cellular conditions.
4.1.2 Fe (II) + DFO (HY-B1625) Control: Used to verify that signal enhancement is dependent on Fe (II).
4.1.3 Fe (III) + Diphenyleneiodonium chloride (HY-100965) Control: Used to confirm that Fe (III) response relies on membrane-associated iron reductase.
4.1.4 HoloTf + apoTf Control: Used to inhibit the binding of HoloTf to transferrin receptor (TfR).
4.1.5 HoloTf + NaN₃ Control: Used to inhibit energy-dependent endosomal internalization.
4.1.6 HoloTf + NH₄Cl Control: Used to inhibit endosomal acidification.
4.1.7 HoloTf + DFO Control: Used to chelate labile Fe (II) in endosomes.
4.1.8 Mn₂Tf Control: Used to confirm the iron specificity of the response.
4.2 The following controls are required for primary hippocampal neuron imaging:
4.2.1 Vehicle-only Control: Used to detect basal fluorescence signal.
4.2.2 Holo Transferrin + DFO Control: Used to verify that signal enhancement is dependent on Fe (II).

5. Detection and Analysis
5.1 Instrument: Confocal fluorescence microscope or wide-field fluorescence microscope.
5.1.1 Excitation/Emission Wavelengths: Excitation wavelength 540 nm, emission wavelength 575 nm.
5.2 Result Analysis:
5.2.1 Fluorescence Intensity Change: A fluorescence turn-on response occurs upon reaction with Fe (II); significant intensity increases are observed in plasma membrane or endosomal punctate structures after treatment with Fe (II)/Fe (III)/HoloTf.
5.2.2 Fluorescence Localization:
5.2.2.1 After HoloTf treatment, the reacted Mem-RhoNox shows punctate staining corresponding to endosomes, with additional signal accumulation in the plasma membrane and perinuclear region.
5.2.2.2 In neurons, fluorescence signals localize to the cell body and neuronal processes, with punctate signals visible in regions resembling synaptic terminals.
5.2.3 Color Change: Red/orange fluorescence emission is produced.

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