Base by Base

00:28:42

452: Reduzir a PrP funciona em todas as linhagens [PT]

Base by Base ·

2026/08/28

Minikel EV et al., Nucleic Acids Research - Este estudo testa a redução da proteína priônica (PrP) por oligonucleotídeos antisense (ASOs) em camundongos, variando doses, esquemas de aplicação, linhagens de príon e estágios da doença. O tratamento reduziu o RNA do Prnp, prolongou a sobrevida, atrasou os sintomas e reverteu biomarcadores de lesão neuronal e de gliose em vários cenários. O benefício apareceu mesmo com redução parcial, nas cinco linhagens

en-us

00:24:36

451: Prion protein lowering is disease-modifying...

Base by Base ·

2026/08/25

Minikel EV et al., Nucleic Acids Research - This study uses antisense oligonucleotides (ASOs) to lower prion protein (PrP) RNA in mice and shows dose-dependent extension of survival, efficacy across multiple prion strains, reversal of molecular biomarkers, and benefit even when treatment is delayed into symptomatic stages. Key terms: prion protein, antisense oligonucleotide, neurodegeneration, biomarkers, survival. Study Highlights:Using ASOs to reduce

en-us

00:24:36

451: Prion protein lowering is disease-modifying...

Base by Base ·

2026/08/25

Minikel EV et al., Nucleic Acids Research - This study uses antisense oligonucleotides (ASOs) to lower prion protein (PrP) RNA in mice and shows dose-dependent extension of survival, efficacy across multiple prion strains, reversal of molecular biomarkers, and benefit even when treatment is delayed into symptomatic stages. Key terms: prion protein, antisense oligonucleotide, neurodegeneration, biomarkers, survival. Study Highlights:Using ASOs to reduce

en-us

00:24:57

450: ASOs que reduzem PrP prolongam a sobrevida [PT]

Base by Base ·

2026/08/24

Raymond GJ et al., JCI Insight - This episode covers a 2019 study showing that sequence-specific antisense oligonucleotides (ASOs) targeting the prion protein (PrP) mRNA, delivered by bolus intracerebroventricular injection, lower PrP levels in the CNS, slow neuropathology, and markedly extend survival in prion-infected wild-type mice when given prophylactically or even near symptom onset. Key terms: antisense oligonucleotide, prion disease, prion

en-us

00:28:46

449: siRNA divalente para doença priônica [PT]

Base by Base ·

2026/08/24

Gentile JE et al., Nucleic Acids Research - Discovery and preclinical development of divalent siRNA candidates targeting PRNP, identifying 2439-s4 as a potent, durable human PRNP-lowering drug candidate with IND clearance. Key terms: prion disease, PrP lowering, divalent siRNA, 2439-s4, RNAi therapeutics. Study Highlights:Authors screened divalent siRNA libraries and identified mouse-targeting 1682-s4 that lowered brain PrP to ~49% and extended survival

en-us

00:25:16

448: PrP‑lowering ASOs prolong survival in...

Base by Base ·

2026/08/23

Raymond GJ et al., JCI Insight - This study tests antisense oligonucleotides (ASOs) targeting Prnp in wild‑type mice infected with RML prions and shows that sequence‑specific PrP lowering by bolus i.c.v. ASO dosing delays disease and extends survival, even when given near clinical onset. Key terms: prion disease, antisense oligonucleotide, PrP lowering, mouse model, intracerebroventricular delivery. Study Highlights:Two sequence‑specific ASOs targeting

en-us

00:23:33

447: Divalent siRNA for prion disease

Base by Base ·

2026/08/23

Gentile JE et al., Nucleic Acids Research - This study develops and tests divalent siRNA molecules that lower prion protein (PrP) in the brain, identifies a potent human-targeting candidate (2439-s4), demonstrates survival benefit in prion-infected mice with a mouse-targeting tool compound, and reports IND-enabling toxicology supporting clinical testing. Key terms: prion disease, PrP lowering, divalent siRNA, 2439-s4, transgenic mouse. Study

en-us

00:28:38

446: Cilia, Synuclein, and Survival: G51D Mice Reveal...

Base by Base ·

2026/08/23

Lin Y‑E et al., PNAS - Knock‑in SncaG51D/G51D mice show selective loss of primary cilia in specific striatal interneurons, astrocytes, piriform cortex PV cells and olfactory basal stem cells, with concomitant reduction in Hedgehog‑dependent neurotrophic signaling linked to Parkinson’s disease vulnerabilities. Key terms: alpha-synuclein, primary cilia, neurotrophic signaling, Parkinson’s disease, G51D mouse. Study Highlights:Using SncaG51D/G51D knock‑in

en-us

00:26:55

445: Why Thymine Survived the UV: Photodamage...

Base by Base ·

2026/08/22

Khosh Abady K et al., PNAS - Spectroscopic comparison of thymine and uracil under 265 nm UVC shows thymine is more photoreactive and absorbs more primordial UVC, yet channels damage into reversible CPDs rather than irreversible (6-4) lesions, supporting an evolutionary 'molecular sunscreen' role. Key terms: UV photodamage, thymine, uracil, cyclobutane pyrimidine dimer, origin of life. Study Highlights:The authors used absorption, fluorescence, and Raman

en-us

00:26:55

445: Why Thymine Survived the UV: Photodamage...

Base by Base ·

2026/08/22

Khosh Abady K et al., PNAS - Spectroscopic comparison of thymine and uracil under 265 nm UVC shows thymine is more photoreactive and absorbs more primordial UVC, yet channels damage into reversible CPDs rather than irreversible (6-4) lesions, supporting an evolutionary 'molecular sunscreen' role. Key terms: UV photodamage, thymine, uracil, cyclobutane pyrimidine dimer, origin of life. Study Highlights:The authors used absorption, fluorescence, and Raman

en-us

00:24:40

444: Many-eyes or Sentinels? How Cost Curvature...

Base by Base ·

2026/08/19

Pilgrim C et al., PNAS - A minimal analytical model shows that whether animal groups adopt distributed low-level vigilance (many-eyes) or concentrated high-vigilance roles (sentinels) depends on how individual vigilance costs scale with effort. The same dichotomy appears in selfish and cooperative groups and explains switching, edge effects, and turn-taking. Key terms: collective vigilance, many-eyes, sentinel behavior, vigilance costs, behavioral

en-us

00:24:40

444: Many-eyes or Sentinels? How Cost Curvature...

Base by Base ·

2026/08/19

Pilgrim C et al., PNAS - A minimal analytical model shows that whether animal groups adopt distributed low-level vigilance (many-eyes) or concentrated high-vigilance roles (sentinels) depends on how individual vigilance costs scale with effort. The same dichotomy appears in selfish and cooperative groups and explains switching, edge effects, and turn-taking. Key terms: collective vigilance, many-eyes, sentinel behavior, vigilance costs, behavioral

en-us

00:19:35

443: 5D‑ASO boosts exon 51 skipping and restores...

Base by Base ·

2026/08/18

Feng P et al., PNAS - This paper describes a bipartite antisense oligonucleotide (5D‑ASO) design that appends a short 5′ splice site decoy tail to improve exon skipping, demonstrating robust efficacy for DMD exon 51 in cells, mice, and cynomolgus monkeys with a favorable safety profile. Key terms: antisense oligonucleotide, exon skipping, Duchenne muscular dystrophy, U1 snRNA decoy, dystrophin restoration. Study Highlights:The authors developed a

en-us

00:19:35

443: 5D‑ASO boosts exon 51 skipping and restores...

Base by Base ·

2026/08/18

Feng P et al., PNAS - This paper describes a bipartite antisense oligonucleotide (5D‑ASO) design that appends a short 5′ splice site decoy tail to improve exon skipping, demonstrating robust efficacy for DMD exon 51 in cells, mice, and cynomolgus monkeys with a favorable safety profile. Key terms: antisense oligonucleotide, exon skipping, Duchenne muscular dystrophy, U1 snRNA decoy, dystrophin restoration. Study Highlights:The authors developed a

en-us

00:22:57

442: When pumps go missing: Ca2+ control of PMCA2 in...

Base by Base ·

2026/08/17

Rolseth AB et al., Proceedings of the National Academy of Sciences (PNAS) - This study links reduced Ca2+ entry through mutant TMC1 mechanotransducer channels to decreased PMCA2 pump density in outer hair cell stereocilia. PMCA2 turnover is rapid in the early postnatal period and is regulated by stereociliary Ca2+ via insertion from an apical vesicular pool; Neuroplastin (NPTN) later stabilizes the pump complex. Persistent pump reduction at hearing onset

en-us

00:24:01

441: Evolutionary mapping of Cav1.3 functional sites

Base by Base ·

2026/08/14

Tang X et al., PNAS - The authors apply an evolutionary sequence-covariation model to the Cav1.3 (CACNA1D) α1-subunit, map predicted pathogenicity onto structural models, and validate five predicted sites by patch-clamp electrophysiology and structural analysis. Predictions recapitulate known functional regions, reveal previously unrecognized clusters, and the tested variants produce diverse functional outcomes from nonconducting channels to gain- and

en-us

00:24:01

441: Evolutionary mapping of Cav1.3 functional sites

Base by Base ·

2026/08/14

Tang X et al., PNAS - The authors apply an evolutionary sequence-covariation model to the Cav1.3 (CACNA1D) α1-subunit, map predicted pathogenicity onto structural models, and validate five predicted sites by patch-clamp electrophysiology and structural analysis. Predictions recapitulate known functional regions, reveal previously unrecognized clusters, and the tested variants produce diverse functional outcomes from nonconducting channels to gain- and

en-us

00:23:41

440: DENV-4: Suppressing DNA Repair and Causing...

Base by Base ·

2026/08/12

Lamkina EN et al., PNAS - This episode reviews a PNAS brief report showing that DENV-4 infection induces marked DNA damage in infected cells while broadly suppressing transcription of DNA repair pathways, with selective upregulation of a mutagenic translesion polymerase and suppressed ATR expression. The findings raise concerns about long-term molecular "scars" after dengue infection that could influence cancer and postdengue syndromes. Key terms: Dengue,

en-us

00:23:41

440: DENV-4: Suppressing DNA Repair and Causing...

Base by Base ·

2026/08/12

Lamkina EN et al., PNAS - This episode reviews a PNAS brief report showing that DENV-4 infection induces marked DNA damage in infected cells while broadly suppressing transcription of DNA repair pathways, with selective upregulation of a mutagenic translesion polymerase and suppressed ATR expression. The findings raise concerns about long-term molecular "scars" after dengue infection that could influence cancer and postdengue syndromes. Key terms: Dengue,

en-us

00:23:41

440: DENV-4: Suppressing DNA Repair and Causing...

Base by Base ·

2026/08/12

Lamkina EN et al., PNAS - This episode reviews a PNAS brief report showing that DENV-4 infection induces marked DNA damage in infected cells while broadly suppressing transcription of DNA repair pathways, with selective upregulation of a mutagenic translesion polymerase and suppressed ATR expression. The findings raise concerns about long-term molecular "scars" after dengue infection that could influence cancer and postdengue syndromes. Key terms: Dengue,

en-us

All Episodes

Similar Podcasts

Beyond the Divide

Koala Moon

The SCP Experience

Dr. NoSleep Studios

John Michael Godier"s Event Horizon

John Michael Godier

La Science CQFD

France Culture

A Moment of Science

Indiana Public Media