274: RPE MCT2: A metabolic gene-agnostic approach to preserve cones in RP

PNAS - RPE-specific MCT2 gene delivery preserves cones and vision in retinitis pigmentosa models Music:Enjoy the music based on this article at the end of the episode. Article title:RPE-specific MCT2 expression promotes cone survival in models of retinitis pigmentosa Journal:PNAS DOI:10.1073/pnas.2421978122 License:This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/ Support:Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00 Official website https://basebybase.com On PaperCast Base by Base you’ll discover the latest in genomics, functional genomics, structural genomics, and proteomics. QC:This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-01-29. QC Scope:- article metadata and core scientific claims from the narration- excludes analogies, intro/outro, and music- transcript coverage: Audited transcript sections covering: metabolic mechanism (RPE lactate uptake via MCT2 and glucose sparing), vector design (AAV8.Best1.MCT2), RP animal models and cone survival/function outcomes, FLIM-based lactate/glucose sensors (LiLac, GlucoSnFR-TS), MCT2 localization to apical/basal RPE membranes, observed species-- transcript topics: RPE-specific MCT2 metabolic reprogramming; Retina metabolism: lactate, glucose, and NAD+ dynamics in RP; AAV8.Best1.MCT2 vector design and RPE specificity; RP models: S334ter rat, FVB mouse, P23H mouse; Cone survival and functional outcomes (cone counts and optomotor assay); FLIM-based lactate and glucose sensors (LiLac, GlucoSnFR-TS) QC Summary:- factual score: 10/10- metadata score: 8/10- supported core claims: 6- claims flagged for review: 0- metadata checks passed: 3- metadata issues found: 1 Metadata Audited:- article_doi- article_title- article_journal- license Factual Items Audited:- RPE-specific MCT2 expression increases cone survival across RP models (rat S334ter; mouse FVB and P23H).- MCT2 expression transiently preserves cone function in P23H mice (optomotor results at P40; diminished by P53).- MCT2 localizes to apical and basal membranes of the RPE after AAV delivery.- FLIM sensors show higher intracellular lactate and greater glucose accumulation in MCT2-expressing RPE, consistent with reduced glycolysis and glucose sparing for cones.- Three RP mutations/models tested support a gene-agnostic approach.- Toxicity observed in mice but not rats; potential translational bottleneck due to species-specific responses. QC Flagged Items (audited and not fully supported):- license: metadata does not match the canonical article record. License naming differs between metadata snapshot and article description; both refer to CC BY variants.Internal QC note: manual editorial review is recommended before publication. QC result: Warning. Items above were flagged during automated QC; the editorial team reviewed them before release. Chapters (00:00:00) - Blending Genomics Into Your Life(00:00:28) - The starvation of RPE(00:02:48) - New science in retinal degeneration(00:03:56) - Gene therapy to save the retina(00:08:04) - Pigmented eyes to help sight?(00:10:25) - Genetics fixes blindness in mice(00:13:47) - A New way to save the brain(00:14:36) - Open the Gate, Let the Sugar Run