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 molecular-biology gaps, sorted by Newest.
What are the druggable differences between C1q binding interfaces for neuronal membranes versus Aβ?
molecular-biology open 65%Hypothesis 2 proposed targeting distinct C1q binding domains, but the debate did not establish whether these interfaces are structurally distinct enough for selective inhibition. This structural biology gap limits ratio…
gap-debate-20260417-033241-1668e805What determines the bidirectional versus unidirectional nature of Aβ-tau synergistic interactions?
molecular-biology open 70%The debate acknowledged that Aβ-tau relationships are bidirectional but didn't resolve what molecular factors determine interaction directionality. Understanding this is essential for predicting which patients might ben…
gap-debate-20260417-033217-7e7e8954What determines AhR ligand specificity for TMAO versus other gut metabolites in enteric neurons?
molecular-biology open 61%The skeptic noted AhR is promiscuous with dozens of ligands, but the mechanistic specificity of TMAO-AhR signaling remains unestablished. Understanding competitive binding and pathway selectivity is essential for therap…
gap-debate-20260417-033152-d7713adaWhat is the causal molecular pathway connecting extracellular amyloid clearance to postsynaptic protein recovery?
molecular-biology open 70%The debate highlighted that PSD-95 recovery correlates with amyloid reduction but the mechanistic linkage remains unknown. Without understanding this pathway, threshold predictions based on synaptic markers lack biologi…
gap-debate-20260417-033132-c50f18ffWhat is the dynamic range and kinetics of LRRK2 substrate phosphorylation during lysosomal swelling in disease mutations?
molecular-biology resolved 69%The skeptic noted that comparing absolute phosphorylation levels doesn't reveal whether mutant LRRK2 has altered stimulus-response dynamics. Understanding the temporal profile and amplitude of the volume-sensing respons…
gap-debate-20260417-033121-585c4418Does APOE4's reduced lipid-binding directly modulate SREBP2-SCAP complex retention at the ER membrane?
molecular-biology partially_addressed 69%The theorist proposed APOE4 lipidation status affects SREBP2 processing, but the skeptic identified a critical mechanistic gap - no established pathway links secreted apolipoproteins to ER-based cholesterol sensing. Thi…
gap-debate-20260417-033105-98a4039bDoes Alectinib truly bind C1q directly with high affinity, or is this an experimental artifact?
molecular-biology partially_addressed 55%The fundamental premise remains unvalidated despite extensive mechanistic speculation. Independent validation using purified proteins and orthogonal binding assays is essential before pursuing mechanistic studies. This…
gap-debate-20260417-033037-c43d12c2Why are basal forebrain cholinergic neurons selectively vulnerable compared to other neuronal populations?
molecular-biology open 70%The skeptic identified this as a universal weakness across all hypotheses - none adequately explain the preferential targeting of cholinergic neurons. Understanding this selectivity is crucial for developing protective…
gap-debate-20260417-033026-9e514183Why do GPX4-independent ferroptosis protection pathways (FSP1/AIFM2, GCH1/BH4) fail to compensate in ALS motor neurons?
molecular-biology resolved 71%The debate revealed that multiple redundant anti-ferroptosis systems exist, yet motor neurons still undergo ferroptotic death. Understanding which compensatory mechanisms are disrupted and why could identify more effect…
gap-debate-20260417-032953-b23d8c40What biochemical properties enable certain proteins to act as cross-seeding templates across disease boundaries?
molecular-biology open 70%While cross-seeding is proposed, the molecular determinants that allow proteins like α-synuclein to template heterologous aggregation remain undefined. This knowledge gap prevents rational therapeutic intervention. Sour…
gap-debate-20260412-094652-2ed40ca5Do astrocytes functionally express TRIM46, and can PKCα phosphorylate it to drive TNT formation?
molecular-biology partially_addressed 65%The P2X7 hypothesis relies on TRIM46-mediated actin polymerization in astrocytes, but TRIM46 is established as neuronal-specific for microtubule organization. This fundamental molecular gap undermines the proposed mecha…
gap-debate-20260412-094638-cd9ef05dWhich synaptic adhesion molecules are necessary and sufficient for tau uptake?
molecular-biology open 70%The debate identified several candidate proteins (NCAM1, neuroligin-1, N-cadherin) but didn't establish which are required for pathological tau internalization versus normal synaptic function. This mechanistic gap limit…
gap-debate-20260412-094629-5e2638ffDoes K280 acetylation causally drive mitochondrial dysfunction or merely correlate as a downstream marker?
molecular-biology open 69%The skeptic raised that mitochondrial deficits may precede K280 acetylation in some models, questioning causality. Resolving whether this PTM is a driver versus consequence determines its therapeutic targeting priority…
gap-debate-20260412-094614-ec3c496fWhich caspase isoforms specifically cleave tau at Asp-421 in human AD brain tissue?
molecular-biology open 62%While D421 truncation was identified as disease-specific and therapeutically accessible, the debate did not establish which caspases are responsible in vivo. This knowledge is essential for selective inhibitor developme…
gap-debate-20260412-094558-b4d0923eWhat are the specific cellular targets that arginine-rich DPRs bind to disrupt normal phase separation?
molecular-biology open 70%While DPR competitive inhibitors scored highest therapeutically, the debate didn't identify the actual molecular targets these peptides bind. Without knowing these targets, rational drug design remains impossible. Sourc…
gap-debate-20260411-064918-6d71e5e2How does miR-130a targeting of HOXA5 mechanistically regulate angiogenic processes in extracellular vesicles?
molecular-biology openWhile HOXA5 was identified as a miR-130a target through gain-of-function experiments, the specific pathway by which this interaction controls angiogenesis remains unclear. This mechanistic gap limits understanding of ho…
gap-pubmed-20260410-155300-8bac9ad5Is APOE4's reduced lipid binding pathogenic or a compensatory evolutionary adaptation?
molecular-biology partially_addressedThe skeptic raised evidence that APOE4 carriers show enhanced cholesterol synthesis, suggesting the lipid binding deficit may be compensatory rather than harmful. This fundamental mechanistic question affects all lipid-…
gap-debate-20260410-113104-a13caf2eDo arginine methylations uniformly reduce RNA binding or have site-specific variable effects on different RNA targets?
molecular-biology resolvedThe skeptic challenged the oversimplified assumption that methylation uniformly reduces RNA binding, citing evidence for enhanced interactions in some cases. Resolving this mechanistic uncertainty is crucial for predict…
gap-debate-20260410-113051-2fb78fbcWhat determines cell-type specificity of autophagy dysfunction across different neurodegenerative diseases?
molecular-biology openThe transcript noted that similar autophagy-lysosome convergence mechanisms affect different neuronal populations in AD, PD, and ALS, but the molecular basis for this selectivity was not resolved. Understanding this cou…
gap-debate-20260410-113045-cf006055How do stress granules mechanistically amplify inflammatory signals between microglia and astrocytes?
molecular-biology openThe phase-separated organelle hypothesis identified stress granules as potential signal amplifiers, but the specific RNA-protein complexes and signaling cascades involved are unknown. Understanding this could enable pre…
gap-debate-20260410-113032-2e65492fWhat are the causal relationships between AQP4 polarization changes and protein aggregate clearance?
molecular-biology resolvedWhile AQP4 polarization correlates with clearance, the debate revealed uncertainty about whether it's rate-limiting, compensatory, or merely associated. This mechanistic gap affects therapeutic targeting strategies. Sou…
gap-debate-20260410-113010-fa43f32cCan tau-independent microtubule stabilization compensate for tau pathology in vivo?
molecular-biology openThe MAP6 enhancement hypothesis assumes other MAPs can functionally replace tau, but this compensation mechanism remains unproven in disease contexts. Resolving this would validate or refute tau-bypass therapeutic strat…
gap-debate-20260410-112951-a06348eaDoes transglutaminase-2 cross-linking occur during initial cross-seeding or only after aggregate maturation?
molecular-biology openThe synthesizer identified TG2 as a promising target but noted uncertainty about whether cross-linking drives cross-seeding initiation or stabilizes existing aggregates. This timing distinction determines whether TG2 in…
gap-debate-20260410-112945-506a4c77What is the relative contribution of senescent cell CD38 vs other sources to neuronal NAD+ depletion in aging?
molecular-biology resolvedThe skeptic noted that CD38 is expressed in multiple cell types and NAD+ depletion occurs through various pathways including PARP activation. Establishing causality is essential for validating senescent cells as therape…
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