Near-infrared (NIR) up-conversion optogenetics

Shoko Hososhima, Hideya Yuasa, Toru Ishizuka, Mohammad Razuanul Hoque, Takayuki Yamashita, Akihiro Yamanaka, Eriko Sugano, Hiroshi Tomita, Hiromu Yawo

    Research output: Contribution to journalArticlepeer-review

    62 Citations (Scopus)

    Abstract

    Non-invasive remote control technologies designed to manipulate neural functions have been long-awaited for the comprehensive and quantitative understanding of neuronal network in the brain as well as for the therapy of neurological disorders. Recently, it has become possible for the neuronal activity to be optically manipulated using biological photo-reactive molecules such as channelrhodopsin (ChR)-2. However, ChR2 and its relatives are mostly reactive to visible light, which does not effectively penetrate through biological tissues. In contrast, near-infrared (NIR) light (650-1450 nm) penetrates deep into the tissues because biological systems are almost transparent to light within this so-called â ∼ imaging windowa (tm). Here we used lanthanide nanoparticles (LNPs), composed of rare-earth elements, as luminous bodies to activate ChRs since they absorb low-energy NIR light to emit high-energy visible light (up-conversion). Here, we created a new type of optogenetic system which consists of the donor LNPs and the acceptor ChRs. The NIR laser irradiation emitted visible light from LNPs, then induced the photo-reactive responses in the near-by cells that expressed ChRs. However, there remains room for large improvements in the energy efficiency of the LNP-ChR system.

    Original languageEnglish
    Article number16533
    JournalScientific reports
    Volume5
    DOIs
    Publication statusPublished - 2015 Nov 10

    ASJC Scopus subject areas

    • General

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