Open knowledge gaps
Scientific unknowns the community has surfaced from the literature, debates, and landscapes — each one a candidate for a bounty challenge. Pick a gap, fund it, and the substrate runs the resolution.
Showing cell-biology gaps, sorted by Newest.
Can lysosomal dysfunction convert tau into proteolysis-resistant conformations that propagate independently?
cell-biology open 70%The hypothesis that Aβ-mediated lysosomal damage creates self-propagating tau seeds was proposed but remains mechanistically unvalidated. This gap prevents development of autophagy-enhancing therapeutics and understandi…
gap-debate-20260417-033220-7c754f9fHow do endolysosomal membrane damage patterns influence protein aggregation specificity and cross-seeding efficiency?
cell-biology open 68%The debate identified membrane damage as a potential cross-seeding prerequisite but didn't resolve how damage topology affects which proteins aggregate together. This mechanistic gap limits therapeutic targeting of orga…
gap-debate-20260412-094653-2596bebcCan mitochondria within extracellular vesicles retain respiratory competence after EV biogenesis and transfer?
cell-biology open 65%The EV hypothesis assumes functional mitochondrial delivery, but the vesicle packaging process may damage mitochondrial membranes or disrupt electron transport complexes. Functional validation using oxygen consumption a…
gap-debate-20260412-094639-f8d0d1edHow do extracellular vesicle and trans-synaptic pathways interact in vivo?
cell-biology open 66%Both mechanisms were supported but their relative contributions and potential synergistic effects remain unclear. Understanding pathway crosstalk is essential for determining whether therapeutic strategies should target…
gap-debate-20260412-094626-3a8a21f8What is the mechanistic link between SYNGAP1-mediated cytoskeletal dysregulation and disrupted division plane orientation?
cell-biology openThe study shows SYNGAP1 haploinsufficiency causes cytoskeletal dynamics defects that impair radial glia scaffolding and division plane, but the specific molecular pathway connecting these events is not elucidated. Under…
gap-pubmed-20260411-084511-b4f09ce1Which specific phosphoinositide signaling nodes are most critical for neuronal survival in Alzheimer's pathogenesis?
cell-biology open 65%The transcript mentions phosphoinositide pathway restoration but doesn't identify which specific enzymes or signaling branches are most therapeutically relevant. This mechanistic gap limits rational target selection for…
gap-debate-20260411-064937-f0f36214How does SMS1-mediated sphingomyelin synthesis specifically regulate membrane trafficking pathways?
cell-biology openWhile SMS1 catalyzes sphingomyelin synthesis from ceramide, the study doesn't explain how this lipid synthesis activity mechanistically controls protein trafficking between cellular compartments. This represents a funda…
gap-pubmed-20260410-193248-542f59dbWhat mechanisms drive nucleolin's translocation from nucleus to cell surface in cancer cells?
cell-biology openThe abstract notes nucleolin appears on cancer cell surfaces but doesn't explain how this nuclear protein translocates or what triggers this pathological redistribution. Understanding this mechanism could reveal therape…
gap-pubmed-20260410-174106-c7ebc0f1How do E2F7/E2F8 atypical repressors mechanistically coordinate the unique G2/M transcriptional program?
cell-biology openThe abstract identifies that atypical E2F repressors coordinate a unique G2/M program critical for mitosis and cytokinesis, but the specific transcriptional targets and regulatory mechanisms are not described. Understan…
gap-pubmed-20260410-155331-488cbfadHow do canonical E2Fs promote mitosis while simultaneously augmenting endocycle ploidy when ablated?
cell-biology openThe abstract shows that removing canonical E2F activators increases genome ploidy in endocycling cells, yet these same factors coordinate G2/M programs critical for mitosis. This paradoxical relationship between mitotic…
gap-pubmed-20260410-155331-3a6fc77aWhat determines the directionality and selectivity of mitochondrial transfer between specific cell types?
cell-biology openThe debate focused on astrocyte-to-neuron transfer but did not address what molecular signals control transfer direction or why certain cell pairs preferentially exchange mitochondria. This knowledge gap limits precisio…
gap-debate-20260410-113038-4f6dee7dWhat is the relative contribution of connexin-43 gap junctions vs tunneling nanotubes to mitochondrial transfer?
cell-biology partially_addressedThe debate revealed conflicting evidence about whether connexin-43 mediates mitochondrial transfer through gap junctions or tunneling nanotubes. This mechanistic uncertainty undermines therapeutic targeting strategies a…
gap-debate-20260410-113038-57244485Do tunneling nanotubes represent the primary pathway for mitochondrial transfer or are alternative mechanisms dominant?
cell-biology openThe debate focused heavily on TNT-mediated transfer but acknowledged other potential pathways without resolving their relative contributions. This fundamental question affects which therapeutic targets are most relevant…
gap-debate-20260410-112842-bb2910fcHow does cholesterol gradient disruption differentially affect amyloidogenic vs synaptic raft domains in human neurons?
cell-biology openThe concept of selective cholesterol modulation was discussed but mechanistic details of domain-specific targeting remain unclear. Understanding how to therapeutically manipulate cholesterol gradients without compromisi…
gap-debate-20260410-112819-ea2b7c60Which extracellular vesicle subtypes are the primary carriers of pathological tau between neurons?
cell-biology openWhile extracellular vesicles were identified as tau carriers, the specific vesicle populations (exosomes vs microvesicles vs other) and their relative contributions remain undefined. This knowledge gap limits targeted t…
gap-debate-20260410-112730-0b2fc4e8Can lysosomal membrane stabilizers selectively prevent tau seeding without disrupting normal autophagy?
cell-biology openWhile tau-induced lysosomal damage promotes seeding, the therapeutic hypothesis assumes membrane stabilization won't impair essential lysosomal dynamics. This selectivity has not been demonstrated experimentally. Source…
gap-debate-20260410-112451-cfdde459Can TFEB-independent autophagy pathways bypass lysosomal dysfunction in neurodegeneration?
cell-biology resolvedThe synthesizer proposed bypassing TFEB entirely through ULK1/trehalose pathways, but it's unclear whether these alternative routes can overcome the same downstream bottlenecks that may limit TFEB-mediated autophagy. So…
gap-debate-20260410-112348-62a97649What is the mechanistic coupling between autophagy flux and chromatin remodeling in aging neurons?
cell-biology openThe NAD+/SIRT1 hypothesis assumes coordinated autophagy-epigenetic effects but the specific molecular pathways linking protein clearance to chromatin modifications remain undefined. This coupling mechanism is essential…
gap-debate-20260410-111542-72d896bfCan TFEB chronic activation cause lysosomal storage dysfunction that counteracts therapeutic benefits?
cell-biology openWhile TFEB activation was proposed to enhance lysosomal clearance, the skeptic raised concerns about chronic overactivation leading to cellular stress. The long-term consequences of sustained TFEB enhancement remain une…
gap-debate-20260410-111106-b931f830Do mitochondrial-lysosome contact site defects precede or follow autophagy dysfunction in different NDDs?
cell-biology openThe debate mentioned contact site engineering but did not establish the temporal relationship between contact site dysfunction and broader autophagy failure. This sequence determines whether contact sites represent prim…
gap-debate-20260410-110247-a715bfe0What is the mechanistic relationship between APOE4-induced lipid droplet accumulation and mitochondrial dysfunction?
cell-biology resolvedThe Theorist proposed lipid droplet targeting via DGAT1/DGAT2 but the Skeptic noted lack of direct evidence for causality. Understanding whether lipid accumulation drives mitochondrial impairment or vice versa is critic…
gap-debate-20260410-105826-49b48c3eWhat are the downstream signaling pathways linking ARF6/exocyst to VE-cadherin trafficking?
cell-biology openWhile ARF6 and exocyst complex are identified as VE-cadherin interactors involved in trafficking and recycling, the specific signaling cascades and regulatory mechanisms remain undefined. This limits understanding of ho…
gap-pubmed-20260410-105527-aefe8a05Can cellular stress response pathways distinguish between protective and pathological protein transfer?
cell-biology openThe debate raised the possibility that stress responses facilitate both beneficial and harmful protein transmission, but the molecular basis for this selectivity is unresolved. Understanding these discrimination mechani…
gap-debate-20260410-105449-76bedc7bDo bioenergetic checkpoints (ATP/ADP ratios) causally control astrocyte subtype differentiation or merely correlate with it?
cell-biology openThe synthesizer proposed that metabolic sensors guide astrocyte fate decisions, but the debate lacks direct evidence for causality versus correlation. Establishing causality is essential for developing metabolic interve…
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