Arutha K

@aruthak

Brazil Family Chair in Spatial Medicine, UQ & WRI (Views my own)

4.7K Following2.4K Followers4.7K Posts
  1. Arutha K@aruthak
    Arutha K
    RT @mo_lotfollahi: Excited to share CellBridge, our new preprint led by @sevdoche in collaboration with @pafrossard and @DorinaThanou at @EPFL_en! 🔬 Looking at an H&E slide, we can learn a remarkable amount about a tissue: its architecture, the cells within it, and how they interact. But identifying exactly which cells are present can be harder. A lymphocyte may be recognisable, while telling whether it is a T cell or a B cell often requires additional markers. Spatial transcriptomics provides that molecular detail by measuring gene expression in individual cells. But it is much harder to obtain routinely than an H&E slide. Could we use these molecular measurements to teach an image model more about cell identity and help it recognise when appearance alone is not enough? This is the idea behind CellBridge. We trained CellBridge on millions of cells with paired H&E images and Xenium spatial transcriptomic profiles. During training, the model learns to connect each cell’s appearance with its molecular identity. Once trained, it predicts cell types from H&E images alone. Across our benchmarks, CellBridge improved fine-grained cell classification over leading pathology models, with gains of up to 16 percentage points in macro F1. But better classification is only part of the story. Some biologically important distinctions remain difficult to resolve from an image. Our Cell-Ontology-Fallback (COF) module lets the model adjust how specific its answer should be. For example, when the evidence does not support distinguishing a T cell from a B cell, it can report “lymphocyte” rather than commit to an uncertain subtype. COF combines the biological relationships in the Cell Ontology with branch-calibrated conformal prediction to make these decisions. What excites me is the possibility of extracting more cellular detail from routinely available slides while making clearer where additional molecular measurements are still needed. 🎥 Our 1-minute video walks through the idea. Jointly supervised by @pafrossard, @DorinaThanou, and me. A huge thank you to our co-authors: @arpitdm, @AmirhVahidi, Dabin Jeong, @SebastianBirk_, Adam Boxall, @Adib_m_, Marta Rosa Sallese, and Yinshui Chang. 📄 Preprint: 💻 Code: 📓 Tutorial: #ComputationalPathology #SpatialOmics #CellTypeAnnotation #MultimodalLearnin
    03103
  2. Arutha K@aruthak
    Arutha K
    RT @Aiims1742: “It’s been a journey” Shroff told @NBCNews. “I’ve spent my entire life trying to eradicate cancer, primarily pancreatic cancer, but also liver cancers.” An homage to Rachna Shroff, including thoughts from her family. Please read, share & honor her memory.
    012804
  3. Arutha K@aruthak
    Arutha K
    RT @alantomusiak: Many longevity founders ask me what I would be working on if not for DNA damage. Lipid elongation, the topic of a newly published paper, would be towards the top of that list. I first became interested in this when I was working on something very different: epigenetic clocks
    01405
  4. Arutha K@aruthak
    Arutha K
    RT @DrWilliamHwang: Beautiful family and science moment. Congrats @KarlDeisseroth @michelle_monje and everyone who supported them!
    Stanford University @Stanford
    The most important briefings of the day. Karl Deisseroth, professor of bioengineering and of psychiatry and behavioral sciences, shares the news of his Nobel Prize with his kids.
    0204
  5. Stanford University✓@Stanford
    The most important briefings of the day. Karl Deisseroth, professor of bioengineering and of psychiatry and behavioral sciences, shares the news of his Nobel Prize with his kids.
    Download
    5304.7K36.6K4.6M
  6. Arutha K@aruthak
    Arutha K
    RT @exosome: Wow! multiple sclerosis is caused by viral reactivation in monocytes and B cells months before clinical onset.
    027603
  7. Arutha K@aruthak
    Arutha K
    RT @EricTopol: An AI biologist augmented discovery of disease mechanisms and targets for drug treatment. Working autonomously, trained with >24 million publications and >600TB of biomedical data @natBME
    010904
  8. Arutha K@aruthak
    Arutha K
    RT @WesleyResearch: Members of WRI and UQ gathered for a lunch celebrating the establishment of The Brazil Family Chair in Spatial Medicine, a philanthropically funded research leadership position appointed to A/Prof Arutha Kulasinghe @aruthak. @uqnews 👉Read more at
    0104
  9. Arutha K@aruthak
    Arutha K
    RT @EricTopol: The intriguing role of antibodies to protect us from getting cancer, the foundation for a cancer antibody atlas
    010403
  10. Arutha K@aruthak
    Arutha K
    RT @drtomaszgrzywa: Tertiary lymphoid structures are reservoirs of tumour-specific T cells with stem-like progenitor features that could be leveraged by T cell immunotherapies @Nature
    02002
  11. Arutha K@aruthak
    Arutha K
    RT @WesleyResearch: Associate Professor Arutha Kulasinghe @aruthak, Chair in Spatial Medicine and Scientific Director of @Qld_SBC has been named a Research Australia’s UNSW Frontier Award Finalist in recognition of his innovative Cancer Blueprint work. 👏 Learn more -
    Research Australia @ResAustralia
    The Cancer Blueprint maps where cancer's molecules sit, not just what they are — letting clinicians predict treatment response before a single dose is given. Meet finalist Arutha Kulasinghe (UNSW Frontiers Award) 🎟️ #ResAusAwards
    0104
  12. Research Australia@ResAustralia
    The Cancer Blueprint maps where cancer's molecules sit, not just what they are — letting clinicians predict treatment response before a single dose is given. Meet finalist Arutha Kulasinghe (UNSW Frontiers Award) 🎟️ #ResAusAwards
    Download
    011318
  13. Arutha K@aruthak
    Dissecting non-small cell lung cancer (NSCLC) with blood proteomics - from surgical to immunotherapeutic responses
    001102
  14. Arutha K@aruthak
    Arutha K
    RT @SatchinPanda: Can sleep’s core benefits be delivered without actually sleeping? Scientists induced sleep-like neuronal “off periods” during wakefulness in mice, reducing local sleep pressure, weakening synaptic strength, and even restoring memory consolidation during sleep deprivation. The findings suggest key functions of sleep may depend on specific brain activity patterns rather than sleep itself. #SleepScience #Neuroscience #Memory
    034012.3K
  15. Arutha K@aruthak
    Arutha K
    RT @heynavtoor: A GUY AT GOOGLE DEEPMIND MADE AN ISOMETRIC PIXEL-ART MAP OF NEW YORK CITY AND PUT IT ON THE OPEN WEB FOR FREE it's called you open the tab and the city is just sitting there in classic SimCity 2000 isometric pixel art. you scroll. and it keeps going. and going. i zoomed in on midtown and i could read the H&M signage in times square. in red. as actual pixel-art letters on the side of a building. i could see the crystalline spire of the Bank of America Tower poking out of a clump of skyscrapers. individual rooftop HVAC units. tiny green roof gardens. the little driveway loops in front of the hotels. he estimates the map needs roughly 40,000 tiles. nothing is a placeholder. the guy who made it is Andy Coenen, a senior staff engineer at Google DeepMind. he is not a pixel artist. by his own admission he is "a former electronic musician." what he actually did is kind of insane: > pulled NYC's geometry from the Google Maps 3D tiles API > fine-tuned an open-source image model (Qwen-Image-Edit) on ~40 hand-paired examples of "satellite tile → pixel art tile" > spun up 50 parallel instances on rented GPUs and generated tens of thousands of tiles in a few hours > the fine-tune cost him 12 bucks his own stated mission for the project, verbatim, is one sentence: "what's possible now that was impossible before?" apparently the answer is "one engineer can pixel-art most of a metropolis for the price of a sandwich." and the wildest part to me is he didn't sell it. no signup. no paywall. no NFT. you open the URL and the city is yours to wander. the post landed at 1,325 points on Hacker News and topped bestofshowhn's 2026 list. we live in a timeline where a senior engineer at one of the largest AI labs on earth spent his nights pixel-arting Manhattan for fun and then gave it away. the internet is healing.
    02590442K
  16. Arutha K@aruthak
    Arutha K
    RT @RongFan8: Totally over the moon 🤩 , our paper on charting human cellular senescence in aging and disease is on the cover!! It highlights the collective efforts and the first wave of publications from NIH @sennetresearch consortium to map senescent cell states, heterogeneity and niches!!
    Cell @CellCellPress
    New issue alert 👉 This issue's cover artwork portrays the gradual emergence of cellular senescence across the human lifespan reflecting the effort of the Cellular Senescence Network (SenNet) to chart the evolving landscape of human cellular senescence
    045025.6K
  17. Cell@CellCellPress
    New issue alert 👉 This issue's cover artwork portrays the gradual emergence of cellular senescence across the human lifespan reflecting the effort of the Cellular Senescence Network (SenNet) to chart the evolving landscape of human cellular senescence
    Download
    1256433K