Combination of an optical parametric oscillator and quantum-dots 655 to improve imaging depth of vasculature by intravital multicolor two- photon microscopy References and links

Clément Ricard (1, 2) , Lisa Lamasse (1, 2) , Alexandre Jaouen (1, 2) , Geneviève Rougon (1, 2) , Franck Debarbieux (1, 2)

1 INT - Institut de Neurosciences de la Timone
2 CERIMED - Centre Européen de Recherche en Imagerie médicale

Simultaneous imaging of different cell types and structures in the mouse central nervous system (CNS) by intravital two-photon microscopy requires the characterization of fluorophores and advances in approaches to visualize them. We describe the use of a two-photon infrared illumination generated by an optical parametric oscillator (OPO) on quantum-dots 655 (QD655) nanocrystals to improve resolution of the vasculature deeper in the mouse brain both in healthy and pathological conditions. Moreover, QD655 signal can be unmixed from the DsRed2, CFP, EGFP and EYFP fluorescent proteins, which enhances the panel of multi-parametric correlative investigations both in the cortex and the spinal cord.

Domains: Life Sciences [q-bio]; Physics [physics]

Clément Ricard, Lisa Lamasse, Alexandre Jaouen, Geneviève Rougon, Franck Debarbieux. Combination of an optical parametric oscillator and quantum-dots 655 to improve imaging depth of vasculature by intravital multicolor two- photon microscopy References and links. Biomedical optics express, 2016, ⟨10.1364/BOE.7.002362⟩. ⟨hal-01468767⟩