1
|
Chieffo C, Altamura E, Trad LB, Pilet G, Maniti O, Granjon T, Mebarek S, Strazewski P, Fiore M. Comprehensive Characterization of an "Off/On" Rhodol-Based Lysosomal Tracker for Orthogonal Cellular Analysis by Confocal Imaging. Chembiochem 2023; 24:e202200513. [PMID: 36420688 DOI: 10.1002/cbic.202200513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Revised: 11/23/2022] [Accepted: 11/24/2022] [Indexed: 11/25/2022]
Abstract
Two florescent xanthene-cyanamide lysosomal trackers emitting strongly at ∼525 nm were prepared from fluorescein and rhodol methyl esters in microwave-assisted reactions. Both forms named "off" (nonfluorescent lactam) and "on" (strongly fluorescent ring-opened amide) have been comprehensively characterized out by using a combination of NMR spectroscopy, X-ray analysis, fluorimetry and confocal microscopy. Known rhodamines bearing electron-withdrawing groups (EWGs) exhibit an equilibrium between non-fluorescent (off) and fluorescent (on) depending on the dielectric constant of the medium. Here, cyanamide was introduced as EWG amine into the fluorescein and rhodol framework. Unlike rhodamine-type dyes, the ring-opened forms of fluorescein- and rhodol-cyanamides are stable in protic solvents under circumneutral and basic pH conditions. The osteoblastic cell line MC3T3-E1 from C57BL/6 mouse calvaria was used for confocal imaging where the different organelles and nuclei were distinguished by using an orthogonal combination of fluorescent dyes.
Collapse
Affiliation(s)
- Carolina Chieffo
- Institut de Chimie et Biochimie Moléculaires et Supramoléculaires, ICBMS, UMR 5246), Université de Lyon, Université Claude Bernard Lyon 1, Bâtiment Edgar Lederer, 1 Rue Victor Grignard, 69622, Lyon, France
| | - Emiliano Altamura
- Chemistry Department, Università degli studi di Bari "Aldo Moro", Via Orabona 4, 70125, Bari, Italy
| | - Layth Ben Trad
- Institut de Chimie et Biochimie Moléculaires et Supramoléculaires, ICBMS, UMR 5246), Université de Lyon, Université Claude Bernard Lyon 1, Bâtiment Edgar Lederer, 1 Rue Victor Grignard, 69622, Lyon, France
| | - Guillaume Pilet
- Laboratoire des Multimatériaux et Interfaces (LMI, UMR 5615), Université de Lyon, Université Claude Bernard Lyon 1, Bâtiment Eugène Chevreul, 6 Rue Victor Grignard, 69622, Lyon, France
| | - Ofelia Maniti
- Institut de Chimie et Biochimie Moléculaires et Supramoléculaires, ICBMS, UMR 5246), Université de Lyon, Université Claude Bernard Lyon 1, Bâtiment Edgar Lederer, 1 Rue Victor Grignard, 69622, Lyon, France
| | - Thierry Granjon
- Institut de Chimie et Biochimie Moléculaires et Supramoléculaires, ICBMS, UMR 5246), Université de Lyon, Université Claude Bernard Lyon 1, Bâtiment Edgar Lederer, 1 Rue Victor Grignard, 69622, Lyon, France
| | - Saida Mebarek
- Institut de Chimie et Biochimie Moléculaires et Supramoléculaires, ICBMS, UMR 5246), Université de Lyon, Université Claude Bernard Lyon 1, Bâtiment Edgar Lederer, 1 Rue Victor Grignard, 69622, Lyon, France
| | - Peter Strazewski
- Institut de Chimie et Biochimie Moléculaires et Supramoléculaires, ICBMS, UMR 5246), Université de Lyon, Université Claude Bernard Lyon 1, Bâtiment Edgar Lederer, 1 Rue Victor Grignard, 69622, Lyon, France
| | - Michele Fiore
- Institut de Chimie et Biochimie Moléculaires et Supramoléculaires, ICBMS, UMR 5246), Université de Lyon, Université Claude Bernard Lyon 1, Bâtiment Edgar Lederer, 1 Rue Victor Grignard, 69622, Lyon, France
| |
Collapse
|