Ivan Talucci

@ivantalucci.bsky.social

Postdoc at the Shilatifard Lab | former grad. Student Maric Lab | (re)post whatever interests me |🧬🧉☕♟️🏃 🇮🇹🇩🇪🇺🇸 #Autoimmunity #Antibodies #Immunosky https://linktr.ee/ivantalucci

Make sure not to miss our latest paper out now in #JACS - presenting eSylites - small, peptide-based probes for precise mapping of neurons, etc.! Microscale thermophoresis (MST) played a huge part in optimizing the probes structure and sequence for binding affinity. #ChemicalBiology #Synapse

Maric Lab@hmariclab.bsky.social · 2y ago

🚀 Excited to share our latest work in #JACS on eSylites! —Synthetic, high-affinity #ChemicalBiology probes for #SuperResolution #Synapse visualization & precise mapping in neurons and brain slices—without the need for antibodies, tags, or transfection! 📢 Read more: pubs.acs.org/doi/10.1021/...

🚀 Excited to share our latest work in #JACS on eSylites! —Synthetic, high-affinity #ChemicalBiology probes for #SuperResolution #Synapse visualization & precise mapping in neurons and brain slices—without the need for antibodies, tags, or transfection! 📢 Read more: pubs.acs.org/doi/10.1021/...

eSylites: Synthetic Probes for Visualization and Topographic Mapping of Single Excitatory Synapses

The spatiotemporal organization of the postsynaptic density (PSD) is a fundamental determinant of synaptic transmission, information processing, and storage in the brain. The major bottleneck that prevents the direct and precise representation of the nanometer-scaled organization of excitatory glutamatergic synapses is the size of antibodies, nanobodies, and the genetically encoded fluorescent tags. Here, we introduce small, high affinity synthetic probes for simplified, high contrast visualization of excitatory synapses without the limitations of larger biomolecules. In vitro binding quantification together with microscopy-based evaluation identified eSylites, a series of fluorescent bivalent peptides comprising a dye, linker, and sequence composition that show remarkable cellular target selectivity. Applied on primary neurons or brain slices at nanomolar concentrations, eSylites specifically report PSD-95, the key orchestrator of glutamate receptor nanodomains juxtaposed to the presynaptic glutamate release sites that mediate fast synaptic transmission. The eSylite design minimizes a spatial dye offset and thereby enables visualization of PSD-95 with improved localization precision and further time-resolved discrimination. In particular, we find that individual dendritic spines can contain separate nanodomains enriched for either PSD-95 or its closest homologues, PSD-93 or SAP102. Collectively, these data establish eSylites as a broadly applicable tool for simplified excitatory synapse visualization, as well as a high-end microscopy compatible probe for resolving the PSD organization with unprecedented resolution.

pubs.acs.org

When it comes to discovery, we need to remember that our instincts often create an illusion that misleads us into believing that we understand something completely, even though there are many things about it that we don’t and we need to figure out how to ask the right questions!

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An #antibody is a protein generated in a patterned immune response. Exposure to #antigens from external sources (from bacteria, virus, vaccines..) or from inside (e.g. cell components not in their usual locations, self components not recognised as intrinsically you) starts the machinery going....

Climate change is driving global extinction risks, with 1.6% of species threatened at 1.3°C of warming and risks escalating to 29.7% at 5.4°C, according to a new meta-analysis in Science encompassing more than 30 years of research. Read more:

Climate change extinctions

Climate change is expected to cause irreversible changes to biodiversity, but predicting those risks remains uncertain. I synthesized 485 studies and more than 5 million projections to produce a quantitative global assessment of climate change ...

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EMBL scientists discovered that dextromethorphan (DXM) may treat lung #fibrosis. 🫁 DXM is an @fda.gov-approved active ingredient in nonprescription cough syrups. This study, published in Science Translational Medicine, shows how this drug may reduce lung scars. 🧪💊 www.embl.org/news/science...

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Earlier this year in Science, researchers generated a nanoscale-resolution reconstruction of a millimeter-scale fragment of human cerebral cortex, giving an unprecedented view into the structural organization of brain tissue at the supracellular, cellular, and subcellular levels. scim.ag/3BjR7xa

A single neuron (white) shown with 5,600 of the axons (blue) that connect to it. The synapses that make these connections are shown in green. The cell body (central core) of the neuron is about 14 micrometers across.

Having a color-blind colleague is a good reminder that we need to be more careful when designing figures for scientific publication 🧪 My lab has found this page especially useful for selecting color palettes, used in combination with different symbols: thenode.biologists.com/data-visuali...

Color blind friendly palettes for data visualizations with categories

A discussion of color blind friendly palettes for labeling unique catergories in data visualization.

thenode.biologists.com