Rhodamine 123 (chloride) (Synonyms: R-22420,R-302,RH123)

This plan only provides a guide, please modify it to meet your specific needs.

1. Prepare Rhodamine 123 staining solution

(1) Dye stock solution: Use DMSO or ethanol to dissolve Rhodamine 123 into a 5mM stock solution. The prepared stock solution was stored at -4°C in the dark.

(2) Dye working solution: Dilute the stock solution with a suitable buffer (such as serum-free medium, HBSS or PBS) to prepare a dye working solution with a concentration of 1-20μM.

Note: Please adjust the concentration of the working fluid according to the actual situation and prepare it for use.

2. Cell suspension staining(Take a 6-well plate as an example)

(1) Centrifuge suspended cells at 1000g for 3-5 minutes. Discard the supernatant and wash twice with PBS for 5 minutes each time.

(2) Wash the adherent cells twice with PBS, add trypsin to digest the cells, and centrifuge at 1000g for 3-5 minutes after digestion is completed.

(3) Add 1 mL of dye working solution to resuspend the cells, and incubate at room temperature in the dark for 5-30 minutes. The optimal culture time for different cells is different.

(4) After the incubation, centrifuge at 1000g for 5 minutes, remove the supernatant, and add PBS to wash 2-3 times, 5 minutes each time.

(5) Use serum-free cell culture medium or PBS to resuspend the cells and observe them through fluorescence microscopy or flow cytometry.

3. Cell adhesion staining

(1) Culture adherent cells on sterile coverslips.

(2) Remove the coverslip from the culture medium, aspirate the excess culture medium, and place the coverslip in a humid environment.

(3) Add 100uL dye working solution from one corner of the coverslip, shake gently to evenly cover all cells with the dye, and incubate at room temperature in the dark for 30-60 minutes.

(4) Aspirate away the dye working solution and use culture solution to wash the coverslip 2 to 3 times for 5 minutes each time.

4. Microscope detection: The maximum excitation light/emission light of Rhodamine 123 is 507/529nm.

Precautions:

1) Fluorescent dyes all have quenching problems. Please avoid light as much as possible to slow down fluorescence quenching.

2) For your safety and health, please wear a lab coat and disposable gloves.

References:

[1]. M. Huang, et al. Mitochondrial Inner Membrane Electrophysiology Assessed by Rhodamine-123 Transport and Fluorescence. Ann Biomed Eng. 2007 Jul; 35(7): 1276–1285.

[2]. Cristiano Ferlini, Giovanni Scambia. Assay for apoptosis using the mitochondrial probes, Rhodamine123 and 10-N-nonyl acridine orange. 2007;2(12):3111-4. doi: 10.1038/nprot.2007.397.