Aug 19, 2026 · 3 min listen · Last updated August 19, 2026
From storyflo. This is your daily audio brief. Chloe, August 19th. Quick run through ten health stories — let's start with the longevity piece. Let's get into it. First, from PNAS. Overcoming the blood–brain barrier using central nervous system–accessing lipid nanoparticles for enhanced mRNA therapeutics.
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Daily Science Brief · August 19th
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Overcoming the blood–brain barrier using central nervous system–accessing lipid nanoparticles for enhanced mRNA therapeutics
Proceedings of the National Academy of Sciences, Volume 123, Issue 33, August 2026. SignificanceSystemic delivery of mRNA to the brain remains a major barrier to treat central nervous system (CNS) diseases because the blood–brain barrier (BBB) severely restricts therapeutic entry. To overcome this challenge, we developed a CNS-accessing ...
Stochastic tensor contraction for quantum chemistry
Proceedings of the National Academy of Sciences, Volume 123, Issue 33, August 2026. SignificanceThe computational cost of ab initio quantum chemistry simulations is usually dominated by tensor contractions. We introduce a stochastic method to evaluate such tensor contractions with greatly reduced cost. Applying stochastic tensor ...
A regulatory adaptor for RAD51’s AAA+ unfoldase promotes homologous recombination–mediated DNA repair and genome stability
Proceedings of the National Academy of Sciences, Volume 123, Issue 33, August 2026. SignificanceDNA double-strand breaks are dangerous forms of DNA damage that must be accurately repaired to maintain genome stability. A key step in this repair process is the removal of RAD51 filaments. Here, we identify MACIR/C5orf30 as a regulatory ...
Canon enables causal inference of downstream genes in single-cell CRISPR studies via instrumental variable analysis
Proceedings of the National Academy of Sciences, Volume 123, Issue 33, August 2026. SignificanceUnderstanding how genes regulate one another is fundamental to biology, yet existing methods for single-cell CRISPR (sc-CRISPR) screens rely on association-based analyses that cannot establish causality and are prone to high false positive ...
Cryptic small-molecule binding sites in the ARID1B DNA-binding domain
Proceedings of the National Academy of Sciences, Volume 123, Issue 33, August 2026. SignificanceSelective inhibition of the protein ARID1B shows promise as a therapy for the ~9% of human cancers that have mutations in the related protein ARID1A. However, the lack of druggable small-molecule binding sites on the three-dimensional ...
Integrating experimental evolution and transcriptomics reveals the phenotypic and molecular architecture of the pace-of-life syndrome
Proceedings of the National Academy of Sciences, Volume 123, Issue 33, August 2026. SignificanceWhy do behavior, lifespan, and reproduction evolve together? The pace-of-life syndrome (POLS) predicts such integration, yet direct causal evidence remains scarce. Using experimental evolution in the red flour beetle, we show that selection on ...
DNA-bound avian R2 non-LTR retrotransposon protein recruits a second R2 protein for genome-protective second-strand nicking
Proceedings of the National Academy of Sciences, Volume 123, Issue 33, August 2026. SignificanceRetrotransposons encode a protein with nicking endonuclease and reverse transcriptase activities. This protein binds specific RNA transcripts and positions bound RNA for complementary DNA synthesis at the nicked genomic target-site. How the “...
Morphological maturation and circuit integration of adult-born neurons are key to functional recovery after traumatic brain injury
Proceedings of the National Academy of Sciences, Volume 123, Issue 33, August 2026. SignificanceThe adult mammalian brain cannot efficiently replace neurons lost after injury or due to neurodegenerative disease, resulting in lasting cognitive and behavioral deficits. Regeneration-competent vertebrates provide a unique opportunity to ...