John Lock

Microscopy most especially. To be the first human to ever lay eyes on something. What a feeling.

This is the result of a super fun collaboration with Andrew Gunawan from @locusj.bsky.social and Erik Meijering's groups at UNSW (there aren't many collaborators I'd brave a 9-11 hour time difference for, but these guys are great 🦘) and @micoxscopy.bsky.social a bit closer to home! (5/5)

For giggles, we also discovered that you can deliberately force images to be structurally wacky while still getting high scores on quality metrics (please don't try this at home) (4/5)

Most alarmingly, it turns out that sometimes these metrics tell you that your image has got better after image processing, even when your downstream biological analysis gets worse as a result ☹️ (3/5)

We show that PSNR and SSIM fundamentally suck (technical scientific term there) for fluorescence microscopy in general. They also love processed images - even if those processed images don't look all that great. (2/5)

Image quality metrics fail to accurately represent biological information in fluorescence microscopy Image processing methods offer the potential to improve the quality of fluorescence microscopy data, allowing for image acquisition at lower, less phototoxic illumination doses. The training and evalu...

Hello! Very excited to share our latest preprint, which is great news for us but terrible news for any diehard fans of PSNR and SSIM as image quality metrics in microscopy... (1/5)
www.biorxiv.org/content/10.1...

Yes, a wonderful collaboration! Fantastic vision from @superresolusian.bsky.social, Andrew Gunawan & @micoxscopy.bsky.social challenging IQM dogma re what a 'good' #FluorescenceMicroscopy image is. Important ideas for our field, always with good humour, regardless of the hour (or pet behaviour) :)

Our #Extensible_Immunofluorescence (ExIF) technique is a bit like #AI doing #origami. From some starting information (raw images = sheets of paper), AI can re-fold many alternatives (virtual images = alternate origami), capturing more #single-cell biology. Check out: www.nature.com/articles/s41...

Capillary constrictions prime cancer cell tumorigenicity through PIEZO1 Metastasis is a hallmark of cancer and is responsible for the majority of cancer-related deaths. Evidence suggests that even a single cancer cell can spread and seed a secondary tumour. However, not a...

Amazing new collab with & led by @kriskilian.bsky.social showing brief capillary constriction drives cancer stem cell traits & tumorgenicity in a PIEZO (i.e. mechanosensitive) manner. Blood-borne CTCs get an 'aggressiveness boost' from squeezing through small vessels. www.biorxiv.org/content/10.1...

Epithelial–mesenchymal cell state heterogeneity predetermines differential phospho-signaling responses to EGF stimulation Understanding why isogenic cancer cells respond differently to equivalent oncogenic stimuli is vital for optimizing anticancer therapies. Emerging evidence suggests that pre-existing differences in ce...

Not just noise! Single-cell quantitative imaging reveals that epithelial-mesenchymal #EMT cell state pre-determines different magnitudes, kinetics & intracellular spatial routing of EGF-induced phospho-signalling. Great work @felkohdigital.bsky.social & collab team! www.biorxiv.org/content/10.1...

Capillary constrictions prime cancer cell tumorigenicity through PIEZO1 Metastasis is a hallmark of cancer and is responsible for the majority of cancer-related deaths. Evidence suggests that even a single cancer cell can spread and seed a secondary tumour. However, not a...

Amazing new collab with & led by @kriskilian.bsky.social showing brief capillary constriction drives cancer stem cell traits & tumorgenicity in a PIEZO (i.e. mechanosensitive) manner. Blood-borne CTCs get an 'aggressiveness boost' from squeezing through small vessels. www.biorxiv.org/content/10.1...

Christine Chaffer, @skummerf.bsky.social at @garvaninstitute.bsky.social, Smita Krishnaswamy at Yale et al present AAnet a neural network for nonlinear archetype analysis that more accurately captures cell plasticity & learns the spatial organisation of the archetypes. What is the advance? 1/3

Now online in Cancer Discovery: AAnet Resolves a Continuum of Spatially-Localized Cell States to Unveil Intratumoral Heterogeneity - by Aarthi Venkat, Scott Youlten, Beatriz San Juan, Smita Krishnaswamy, Christine Chaffer, and colleagues doi.org/10.1158/2159...

Follow-up stories coming soon on our next-generation beyond #Extensible_Immunofluorescence (i.e. microscopy image data augmentation with Generative AI) & on #EMT definition + dynamics & on E/M state-dependent computation across diverse stimuli + signalling. Watch this #Systems_Microscopy space 🔬👍

Extensible Immunofluorescence (ExIF) accessibly generates high-plexity datasets by integrating standard 4-plex imaging data - Nature Communications Gunawan et al. propose an Extensible Immunofluorescence (ExIF) strategy that integrates distinct 4-plex image panels from routine fluorescence microscopy into multiplexed datasets enabling q...

For those interested in the regression / ML-based #Computational_Multiplexing strategy used by @felkohdigital.bsky.social here, it builds on DL-based #Extensible_Immunofluorescence we demo in www.nature.com/articles/s41.... You can build multiplexed IF data from standard IF with either method.

The first, first-author story www.biorxiv.org/content/10.1... from @felkohdigital.bsky.social & www.cancersystemsmicroscopylab.com exploring how the epithelial-mesenchymal (E/M) state landscape pre-determines EGF signalling responses. An analytical tour-de-force, with more to come on this theme!

Postdoctoral Research Fellow - Medical Oncology Job in Liverpool, Sydney NSW - SEEK Seeking a talented Postdoctoral Research Fellow to join the Cancer and Inflammation Research Group at the Ingham institute, Liverpool.

🔬 PostDoc Alert! Our liquid biopsy collaborators Cancer & Inflammation Lab seek talented PostDoc to develop personalized cancer diagnostics. Focus: DDR & immune biomarkers in prostate/lung/GI cancers. Be part of the #precision_medicine revolution! #PostDoc #CancerResearch
Apply@ tinyurl.com/yps8nwdf

Extensible Immunofluorescence (ExIF) accessibly generates high-plexity datasets by integrating standard 4-plex imaging data Nature Communications - Gunawan et al. propose an Extensible Immunofluorescence (ExIF) strategy that integrates distinct 4-plex image panels from routine fluorescence microscopy into multiplexed...

Our #AI #research @natcomms.nature.com uses #multiomics data integration concepts to fuse 4-channel imaging data into unlimitedly multiplexed image datasets via generative deep learning to interrogate complex cell biology, like #EMT. Multiplexing made easy! rdcu.be/emtBc @singmolsci.bsky.social

I'm developing a new onboarding, orientation & support pack for postdocs & professional staff #UNSW School of Biomedical Sciences. What's the #1 thing you wish someone had told you when you arrived at your institution, to help you connect, contribute & launch your career?