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Ryosuke Kojima

@ryosukekojima.bsky.social
52 followers 49 following 24 posts

Associate Professor at the Graduate School of Medicine, the University of Tokyo. Chemical Biology & Synthetic Biology

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Ryosuke Kojima @ryosukekojima.bsky.social · 28/02/2026
Since the preprint version, we have updated the manuscript with additional data/discussion on the cancer selectivity of the signal and on the mutations that were important for enzyme evolution. Congrats to Wang-san and Kiji-kun! bsky.app/profile/ryos...
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Ryosuke Kojima @ryosukekojima.bsky.social · 28/02/2026
日本語プレスリリースはこちらです: 生体直交性プローブと改変酵素による高精度ながん蛍光可視化の実現 ~背景ノイズを低減し、高いコントラストでのがん部位特異的検出に成功~ www.u-tokyo.ac.jp/content/4002...
u-tokyo.ac.jp
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Ryosuke Kojima @ryosukekojima.bsky.social · 28/02/2026
Our new paper is out in @jacs.acspublications.org ! We developed a novel pair of bioorthogonal fluorescence probe and engineered reporter enzyme, enabling low-background, bright cancer imaging in vivo. pubs.acs.org/doi/10.1021/...
pubs.acs.org
Low-Background Cancer Imaging with a Bioorthogonal Fluorescence Probe and Engineered Reporter Enzyme Bearing a Targeting Moiety
Combinatorial use of an antibody–reporter enzyme conjugate and a fluorescence probe activated by the enzyme is a powerful strategy for fluorescence-guided cancer surgery. However, conventional probes ...
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Ryosuke Kojima @ryosukekojima.bsky.social · 22/02/2026
日本語プレスリリースはこちらです: www.u-tokyo.ac.jp/content/4002...
u-tokyo.ac.jp
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Ryosuke Kojima @ryosukekojima.bsky.social · 22/02/2026
Our collaborative study with Yasui lab @sciencetokyo.bsky.social is out in Science Advances ! With gRNA/GeNL tagging, we showed that cancer-derived small EVs can reach and be concentrated in urine via transcytosis, providing rationale for urinary liquid biopsy. www.science.org/doi/10.1126/...
science.org
Glomerular routing of tumor-derived extracellular vesicles substantiates urinary biopsy
Tumor-derived extracellular vesicles cross the kidney filter into urine via glomerular transcytosis, enabling urinary diagnostics.
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Ryosuke Kojima @ryosukekojima.bsky.social · 28/08/2025
Related post in Japanese web-cdn.bsky.app/profile/ryos...
web-cdn.bsky.app
Ryosuke Kojima (@ryosukekojima.bsky.social)
抗原に結合するだけで光る蛍光プローブの新規設計法に関する論文がJACSで公開になりました! 日本語プレスリリースはこちらです。@jacs.acspublications.org https://www.u-tokyo.ac.jp/content/400268162.pdf [contains quote post or other embedded content]
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Ryosuke Kojima @ryosukekojima.bsky.social · 28/08/2025
Related post web-cdn.bsky.app/profile/ryos...
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Ryosuke Kojima @ryosukekojima.bsky.social · 28/08/2025
Our paper on the antigen fluorogenic sensor is featured as a supplementary cover in this week’s @jacs.acspublications.org ! Beautiful artwork by our co-author, Ryo Tachibana! Read it here: pubs.acs.org/doi/full/10.... #MyACSCover
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Reposted by Ryosuke Kojima
Bryan Dickinson @chembiobryan.bsky.social · 06/08/2025
Thrilled our PANCS-binder tech is finally out in print! www.nature.com/articles/s41... This technology, 11-years in the making, has transformed how we do research in my lab, and was led by an amazing postdoc, Matt Styles, who is currently entering the academic job market - so look out for him! 1/n
nature.com
PANCS-Binders: a rapid, high-throughput binder discovery platform - Nature Methods
Phage-assisted noncontinuous selection of protein binders (PANCS-Binders) allows multiple high-diversity protein libraries to each be screened against a panel of dozens of targets for high-throughput ...
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Reposted by Ryosuke Kojima
Yasu Okamoto @yasuokamoto.bsky.social · 01/08/2025
Our latest paper is finally published in @natcomms.nature.com (doi.org/10.1038/s414...) !! We successfully constructed synthetic multinuclear metal complexes using only proteins.
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Ryosuke Kojima @ryosukekojima.bsky.social · 24/07/2025
抗原に結合するだけで光る蛍光プローブの新規設計法に関する論文がJACSで公開になりました! 日本語プレスリリースはこちらです。@jacs.acspublications.org www.u-tokyo.ac.jp/content/4002...
u-tokyo.ac.jp
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Ryosuke Kojima @ryosukekojima.bsky.social · 24/07/2025
From the preprint version, we updated validation/demonstration of our probes, including the possilibty of lighting up antigen positive cells even in mixed cell population. Congrats to Nakadate-san, Seike-kun, and co-workers! bsky.app/profile/ryos... chemrxiv.org/engage/chemr...
chemrxiv.org
New class of fluorogenic probes for antigens based on DARPin-silicon pyronine conjugates
Fluorogenic probes for antigens are useful for various purposes, including medical diagnostics and imaging, but achieving a rapid, large fluorescence increase is difficult. Here, we report a new class...
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Ryosuke Kojima @ryosukekojima.bsky.social · 24/07/2025
Excited to share that our new paper is out in @jacs.acspublications.org ! We introduce a new design principle for fluorogenic antigen probes, using an intramolecular reaction between a thiol-reactive fluorophore and a cysteine engineered into a DARPin. pubs.acs.org/doi/10.1021/...
pubs.acs.org
Design of Antigen-Targeting Fluorogenic Probes Utilizing Intramolecular Addition Reaction of Protein-Dye Hybrids
Fluorogenic probes for antigens are useful for various purposes, including medical diagnostics and imaging, but achieving a rapid, large fluorescence increase is difficult. Here, we report a new class...
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Ryosuke Kojima @ryosukekojima.bsky.social · 23/04/2025
リンクがきちんと貼れていなかったので再掲 jes1950.jp/J_MEETING/75...
jes1950.jp
第73回日本電気泳動学会シンポジウム
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Ryosuke Kojima @ryosukekojima.bsky.social · 23/04/2025
5/12(月)に第75回日本電気泳動シンポジウム@ Shimadzu Tokyo Innovation Plaza (川崎殿町)を企画しております。非常に魅力的なスピーカー陣&会場ですので、ご興味のある方はぜひご参加ください (参加者把握のため、事前登録をお願いします)。参加費無料です!https://jes1950.jp/J_MEETING/75th_sympo/75th_sympo.html
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Ryosuke Kojima @ryosukekojima.bsky.social · 14/03/2025
New preprint! 当ラボ卒業生の王さんを中心として、生体直交性の高い蛍光プローブ・改変レポーター酵素ペアを開発し、低バックグラウンドのがんイメージングを実現しました。新しいレポーターシステムとして, ELISA, ADEPT他、多用途に使えると考えています!
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Ryosuke Kojima @ryosukekojima.bsky.social · 14/03/2025
New preprint! In a study led by Wang-san, we developed a novel biorthogonal fluorescence probe and an engineered reporter enzyme, enabling low-background cancer imaging. This powerful pair could also be valuable for applications such as ELISA and ADEPT. www.biorxiv.org/content/10.1...
biorxiv.org
Low-Background Cancer Imaging With a Bioorthogonal Fluorescence Probe and Engineered Reporter Enzyme Bearing a Targeting Moiety
Combinatorial use of an antibody-reporter enzyme conjugate and a fluorescence probe activated by the enzyme is a powerful strategy for fluorescence-guided cancer surgery. However, conventional probes ...
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Ryosuke Kojima @ryosukekojima.bsky.social · 21/01/2025
ハイパーリンクがうまくいっていなかったので、再掲。 www.m.u-tokyo.ac.jp/news/jobs/20...
m.u-tokyo.ac.jp
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Ryosuke Kojima @ryosukekojima.bsky.social · 21/01/2025
キャリアステージ/バックグラウンドがやや違っても検討できる可能性ももちろんあるので、ご興味があればまずはご連絡下さい!
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Ryosuke Kojima @ryosukekojima.bsky.social · 21/01/2025
当グループ(@東大医)で博士研究員を募集しています。細胞外小胞/細胞間コミュニケーションの理解や操作を可能とする合成生物学研究に興味のある方はぜひご検討ください。もちろん学振PDの応募などの相談にものれます。ご興味があればお気軽にDMください!https://www.m.u-tokyo.ac.jp/news/jobs/20250121.pdf
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Reposted by Ryosuke Kojima
Dr. Christian Scharun @christianscharun.de · 30/12/2024
2025 = 45² = (20 + 25)² = (1 + 2 + 3 +4 + 5 + 6 + 7 + 8 + 9)² = 1³ + 2³ + 3³ +4³ + 5³ + 6³ + 7³ + 8³ + 9³
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Reposted by Ryosuke Kojima
Takashi Fukaya @fukayalab.bsky.social · 19/12/2024
Are you interested in studying enhancer biology/3D genome organization in my lab at the University of Tokyo? This Biohub Network program would be a great opportunity for you! Feel free to reach out if you're interested!! www.czbiohub.org/program-ssfc...
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Reposted by Ryosuke Kojima
Yasu Okamoto @yasuokamoto.bsky.social · 13/12/2024
📣 Our website got a fresh makeover! 🔍 Check out our updated lab website! sites.google.com/view/y-okamo...
sites.google.com
Designer Biomolecular Chemistry - English
Member Staff Assoc. Prof. (PI) : Yasunori Okamoto Assist. Prof. : – Administrative assistant : Ayaka Noda Research assistant : Tomoko Etoh Student It's you. Apply now!
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Ryosuke Kojima @ryosukekojima.bsky.social · 12/12/2024
新作preprint @chemrxiv.bsky.social を公開しました。チオール反応性蛍光団と抗原認識タンパク質をうまく組み合わせて、抗原に結合して初めて光る蛍光センサーを開発しました。洗浄なしでのがんイメージングなどに応用可能です。卒業生の中館さんが中心となって研究を進めてくれました! bsky.app/profile/ryos...
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Ryosuke Kojima @ryosukekojima.bsky.social · 12/12/2024
New preprint @chemrxiv.bsky.social ! In this work led by Nakadate-san, we have developed a new type of fluorogenic sensor for an antigen that enables wash-free cancer imaging. Check out our unique probe design using a thiol-reactive fluorophore and DARPin! chemrxiv.org/engage/chemr...
chemrxiv.org
New class of fluorogenic probes for antigens based on DARPin-silicon pyronine conjugates
Fluorogenic probes for antigens are useful for various purposes, including medical diagnostics and imaging, but achieving a rapid, large fluorescence increase is difficult. Here, we report a new class...
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Ryosuke Kojima @ryosukekojima.bsky.social · 12/12/2024
日本語プレスリリース: www.u-tokyo.ac.jp/content/4002...
u-tokyo.ac.jp
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Ryosuke Kojima @ryosukekojima.bsky.social · 12/12/2024
English press release: www.eurekalert.org/news-release...
eurekalert.org
Labeling cell particles with barcodes
Cell-to-cell communication through nanosized particles, working as messengers and carriers, can now be analyzed in a whole new way, thanks to a new method involving CRISPR gene-editing technology. The...
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Ryosuke Kojima @ryosukekojima.bsky.social · 12/12/2024
Behind the paper story:https://communities.springernature.com/posts/unveiling-the-release-mechanism-of-small-extracellular-vesicles-with-an-unprecedented-throughput
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Ryosuke Kojima @ryosukekojima.bsky.social · 12/12/2024
Introducing our recent “CIBER screening” paper describing the use of CRISPR-gRNA-barcoded extracellular vesicles (EVs) for high-throughput identification of EV release regulators @naturecomms.bsky.social www.nature.com/articles/s41...
nature.com
Barcoding of small extracellular vesicles with CRISPR-gRNA enables comprehensive, subpopulation-specific analysis of their biogenesis and release regulators - Nature Communications
The release processes of small extracellular vesicles (sEVs) remain poorly understood despite their importance. Here, Kunitake et al. present a screening platform called CIBER screening that enables e...
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