Board of Trustees Professor of Materials Science & Engineering, Chemistry, Medicine, and Biomedical Engineering @NorthwesternU. Director, @NU_CRN.

Chicago, IL and Evanston, IL
Joined October 2018
Samuel Stupp retweeted
We reported in @ScienceMagazine last week on a "self-capping" living supramolecular polymerization that yields chemically segmented, oppositely charged assemblies with precise lengths and collective molar mass reaching into the billion-dalton range. science.org/doi/10.1126/scie…
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Our recent Science paper reported on precise supramolecular polymers in which positively charged segments anchored to neurons while negatively charged ones recruited proteins to generate superbioactive structures for neural growth and synaptic activity. science.org/doi/10.1126/scie…
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The superbioactivity is based on precise segmentation of assemblies containing amino acids with positive and negative charge but lacking specific signals. We observed by live microscopy a "tapping" motion of protein-laden negative segments on neurons at millisecond time scales.
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We reported in @ScienceMagazine last week on a "self-capping" living supramolecular polymerization that yields chemically segmented, oppositely charged assemblies with precise lengths and collective molar mass reaching into the billion-dalton range. science.org/doi/10.1126/scie…
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We report a high-resolution magic-angle spinning NMR study demonstrating intense supramolecular motion in large filamentous assemblies of neuro-active peptide amphiphiles. The motion of these systems is critical in reversing paralysis (Science 2021). pubs.acs.org/doi/full/10.102…
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Using dipolar coupling, we observed the formation of salt bridges between lysine and glutamic acid residues, suggesting the folding of neuro-active epitopes. Coassembly of two biological signals was demonstrated, along with small clusters and filaments in the dynamic systems.
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Reporting here on the crossing of supramolecular peptide amphiphile nanostructures through a blood–brain barrier in vitro model composed of brain endothelial cells. A key factor is tuning cohesion, and interestingly reassembly occurs after the crossing. pubs.acs.org/doi/10.1021/acs…
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12 carbons in the hydrophobic segment generated the right cohesion and pKa of acidic amino acids to cross the barrier and reassemble. 2 or 4 additional carbons trap the assemblies in endothelial cells. Our findings should help in the design of supramolecular drugs for the brain.
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We report on biomaterials that integrate neuronal bioactivity with conducting polymers and a printable polysaccharide. Interestingly, the conducting polymer reduced the concentration of reactive oxygen species, which benefits regeneration. pubs.acs.org/doi/full/10.102…
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The materials enhance maturation and electrophysiology in mouse and human neurons. The bioactivity is provided by supramolecular assemblies of peptide amphiphiles. The conducting polymer was PEDOT with dual functionalization by design for bonding to the printable polysaccharide.
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We report on a fully reversible self-assembling supramolecular system activated by light, chemical fuels, electricity, and X-rays. In the assembled state involving pimerization and π-π stacking, the system stores electrons useful for dark photosynthesis. cell.com/chem/abstract/S2451…
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Using human spinal cord organoids grown in our laboratory, we developed two injury models for spinal cord injury and demonstrated therapeutic efficacy in human tissue of the supramolecular materials first reported in our 2021 Science paper in mice. nature.com/articles/s41551-0…
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These water-based materials will require new approaches to the characterization of ferroelectricity given their expected ionic conductivity. This generates more complex data with linear and nonlinear effects.
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In collaboration with Ayush Batra, we reported on systemically administered supramolecular therapeutic peptides (STPs) that crossed the blood-brain barrier, limited inflammation, and reduced infarct size in a preclinical model of acute ischemic stroke. sciencedirect.com/science/ar…
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Supramolecular nanostructures that mimic glial cell-derived neurotrophic factor (GDNF) promote axonal extension in midbrain human organoids. Results suggest these systems could improve outcomes in cell-based therapies for Parkinson’s disease. nature.com/articles/s41536-0…
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Interestingly, the effective supramolecular copolymerization which traps the toxic peptides requires metastable nanofibers. This significantly improved survival of motor and cortical neurons exposed to Aβ42.
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A hybrid material integrates fluorescent light-harvesting supramolecular polymers and thermo-responsive covalent polymers to emulate mechanical actuation of green plant stomata during photosynthesis. Repeated actuation cycles enhance superoxide production. advanced.onlinelibrary.wiley…
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The highly emissive supramolecular polymers form upon addition of sea water to amino-naphthalene imide aggregates, and the superoxide produced upon visible light irradiation generates hydrogen peroxide—a potential liquid fuel.
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