{"count":5,"limit":50,"offset":0,"edits":[{"id":4968,"actor_id":null,"entity_type":"hypothesis","entity_id":"h-var-abcd9e77ce","action":"update","diff_json":{"after":"be803776f0a525fae7c64c1cd9a87c2f3fa575a2dca0d0b0fbf4319f14424de8","before":"a9e53d7a29e10f892af650945e85472f76b267ee321876f677ae729e3b527793"},"change_reason":"enrich EC-II vulnerability hypotheses with evidence addenda","created_at":"2026-04-21T02:54:50.595930+00:00"},{"id":4969,"actor_id":null,"entity_type":"hypothesis","entity_id":"h-var-abcd9e77ce","action":"update","diff_json":{"after":"This hypothesis proposes using transcranial focused ultrasound (tFUS) with closed-loop feedback to directly target parvalbumin-positive (PV) interneurons in entorhinal cortex layers II-III, addressing the root molecular pathology while restoring downstream hippocampal gamma oscillations. The approach leverages tFUS's superior spatial precision and non-invasive deep tissue targeting to reach entorhinal structures that are inaccessible to surface stimulation methods. The core mechanism targets tau-mediated disruption of AnkyrinG scaffolding at the axon initial segment (AIS) of PV interneurons. In Alzheimer's disease, hyperphosphorylated tau displaces AnkyrinG, causing voltage-gated sodium channel dispersal and compromising the high-frequency firing capacity essential for gamma rhythmogenesis. Acoustic mechanostimulation via tFUS can directly recruit these compromised PV interneurons, bypassing the damaged intrinsic firing machinery by providing external depolarization sufficient to restore perisomatic inhibitory control. This targeted intervention preserves the critical temporal precision of stellate cell networks in the entorhinal-hippocampal circuit. The closed-loop system monitors real-time gamma power in both entorhinal cortex and downstream hippocampal CA1, adjusting ultrasound parameters to maintain optimal oscillatory coupling. By addressing the upstream entorhinal pathology, this approach simultaneously restores hippocampal-prefrontal synchrony and spatial navigation encoding. The intervention specifically targets the early therapeutic window when PV interneurons are functionally impaired but not yet lost, before irreversible circuit degradation occurs. Real-time feedback ensures stimulation parameters adapt to individual pathophysiology, maximizing therapeutic efficacy while minimizing off-target effects.\n\n## Evidence enrichment addendum: ecii-pv-ankyring-ais-integrity\n\n        ### Mechanistic focus\n        PV interneuron axon initial segment integrity, AnkyrinG scaffolding, and hippocampal gamma synchrony.\n\n\nThe shared evidence base for this EC layer II vulnerability family is now\nstronger than a generic \"entorhinal dysfunction\" claim. Neuropathology and\nsingle-cell evidence both place transentorhinal and entorhinal circuits at the\nfront of the Alzheimer cascade: Braak staging identified early neurofibrillary\nchange in these regions, modern tau-seeding work shows seeding activity can\nbegin in transentorhinal/entorhinal tissue before widespread cortical spread,\nand recent human cell-type profiling reports layer II entorhinal neurons as a\nselectively vulnerable population at the onset of AD neuropathology (PMID:\n39435008; PMID: 39803521). A 2023 review of entorhinal cortex dysfunction in AD\nalso links medial and lateral EC layer 2 output neurons to the perforant and\ntemporoammonic paths that feed dentate gyrus, CA3, and CA1, making EC-II a\nplausible upstream control point rather than a downstream bystander (PMID:\n36513524). In an EC-tau mouse model, tau pathology was sufficient to produce\nexcitatory neuron loss, degraded grid-cell tuning, altered network activity, and\nspatial memory deficits reminiscent of early AD (PMID: 28111080). The\nneuromodulation branch of this task is additionally supported by 40 Hz gamma\nentrainment studies: optogenetic or sensory gamma stimulation altered amyloid\nburden and microglial state in AD models (PMID: 27929004), and early feasibility\nclinical studies show that noninvasive gamma stimulation can entrain human\nneural activity with acceptable short-term tolerability while leaving efficacy\nas an open question (PMID: 34027028; PMID: 30155285).\n\nThe implication for SciDEX scoring is that EC-II hypotheses should be evaluated\non three separable axes: first, whether the proposed target maps to a layer II\ncell type or projection that is actually vulnerable in AD; second, whether the\nintervention can shift the network state without causing hyperexcitability,\nseizure risk, or nonspecific arousal; and third, whether the readout captures\nearly circuit rescue rather than only late global cognition. Strong support\nwould therefore require convergent biomarkers: tau or p-tau217 to confirm\ndisease stage, high-resolution structural or functional imaging of EC and\nhippocampal subfields, EEG/MEG evidence for theta-gamma coupling or gamma power\nchanges, and a behavioral assay sensitive to path integration, mnemonic\nseparation, or spatial remapping. Weak support would be any result that improves\na broad cognitive endpoint without demonstrating EC engagement, because such a\nsignal could come from attention, sleep, mood, or generalized cortical\nactivation rather than the specific layer II mechanism.\n\n\n        ### Hypothesis-specific interpretation\n        This variant becomes mechanistically sharp if tFUS is framed as a closed-loop perturbation that restores PV interneuron spike timing and protects AnkyrinG-organized sodium-channel clustering at the axon initial segment. The expected benefit is less about increasing firing globally and more about restoring precise perisomatic inhibition into hippocampal targets.\n\n        ### Validation path\n        Test with PV-specific AIS markers, Nav channel clustering, gamma phase-locking, and tau propagation endpoints in EC-tau or amyloid/tau interaction models; require sham stimulation and off-target cortical controls.\n\n        ### Counterevidence and market caveats\n        Focused ultrasound can recruit vascular, astrocytic, and mechanosensitive pathways outside PV cells, so cell-type attribution should remain provisional until paired with genetic or pharmacologic specificity controls. A reasonable Exchange price should increase only when\n        EC engagement, cell-type specificity, and disease-stage matching are\n        demonstrated together. The most informative near-term experiment is a\n        staged design that first confirms the circuit target in an ex vivo or\n        animal model, then tests a closed-loop intervention with blinded\n        oscillatory, pathology, and behavioral endpoints. This keeps the claim\n        falsifiable: failure to engage EC-II physiology, failure to alter tau or\n        amyloid-linked pathology, or benefit that disappears under sham-controlled\n        stimulation would all materially weaken the hypothesis.\n","before":"This hypothesis proposes using transcranial focused ultrasound (tFUS) with closed-loop feedback to directly target parvalbumin-positive (PV) interneurons in entorhinal cortex layers II-III, addressing the root molecular pathology while restoring downstream hippocampal gamma oscillations. The approach leverages tFUS's superior spatial precision and non-invasive deep tissue targeting to reach entorhinal structures that are inaccessible to surface stimulation methods. The core mechanism targets tau-mediated disruption of AnkyrinG scaffolding at the axon initial segment (AIS) of PV interneurons. In Alzheimer's disease, hyperphosphorylated tau displaces AnkyrinG, causing voltage-gated sodium channel dispersal and compromising the high-frequency firing capacity essential for gamma rhythmogenesis. Acoustic mechanostimulation via tFUS can directly recruit these compromised PV interneurons, bypassing the damaged intrinsic firing machinery by providing external depolarization sufficient to restore perisomatic inhibitory control. This targeted intervention preserves the critical temporal precision of stellate cell networks in the entorhinal-hippocampal circuit. The closed-loop system monitors real-time gamma power in both entorhinal cortex and downstream hippocampal CA1, adjusting ultrasound parameters to maintain optimal oscillatory coupling. By addressing the upstream entorhinal pathology, this approach simultaneously restores hippocampal-prefrontal synchrony and spatial navigation encoding. The intervention specifically targets the early therapeutic window when PV interneurons are functionally impaired but not yet lost, before irreversible circuit degradation occurs. Real-time feedback ensures stimulation parameters adapt to individual pathophysiology, maximizing therapeutic efficacy while minimizing off-target effects."},"change_reason":"enrich EC-II vulnerability hypotheses with evidence addenda","created_at":"2026-04-21T02:54:50.595930+00:00"},{"id":4970,"actor_id":null,"entity_type":"hypothesis","entity_id":"h-var-abcd9e77ce","action":"update","diff_json":{"after":0.78,"before":1.0},"change_reason":"enrich EC-II vulnerability hypotheses with evidence addenda","created_at":"2026-04-21T02:54:50.595930+00:00"},{"id":4971,"actor_id":null,"entity_type":"hypothesis","entity_id":"h-var-abcd9e77ce","action":"update","diff_json":{"after":"2026-04-20 19:54:50.595930-07:00","before":"2026-04-16 15:06:36.818587-07:00"},"change_reason":"enrich EC-II vulnerability hypotheses with evidence addenda","created_at":"2026-04-21T02:54:50.595930+00:00"},{"id":4972,"actor_id":null,"entity_type":"hypothesis","entity_id":"h-var-abcd9e77ce","action":"update","diff_json":{"after":"'2':402 '2023':387 '27929004':498 '28111080':467 '30155285':530 '34027028':528 '36513524':433 '39435008':383 '39803521':385 '40':478 'accept':515 'acoust':138 'activ':349,457,513,682 'actual':565 'ad':380,394,465,495,568 'adapt':258 'addendum':273 'addit':475 'address':54,211 'adjust':202 'ai':16,107,278,755,917 'also':395 'alter':455,488,891 'alzheim':23,112,331 'amyloid':489,895 'amyloid-link':894 'amyloid/tau':773 'anim':861 'ankyr':14,100,118,277,288,718,915 'ankyring-depend':13,914 'ankyring-organ':717 'approach':66,217 'arous':585 'assay':643 'astrocyt':794 'attent':676 'attribut':805 'axe':548 'axon':104,284,726 'base':297 'becom':696 'begin':351 'behavior':642,875 'benefit':731,899 'biomark':607 'blind':871 'braak':333 'branch':470 'broad':662 'burden':490 'bypass':149 'bystand':431 'ca1':201,417 'ca3':415 'capac':133 'captur':591 'cascad':332 'caus':119,579 'caveat':788 'cell':175,318,363,453,559,800,803,828 'cell-typ':362,802,827 'chang':338,639 'channel':124,722,758 'circuit':182,248,325,593,854 'claim':313,880 'clinic':502 'close':2,36,185,706,867 'closed-loop':1,35,184,705,866 'cluster':723,759 'cognit':600,663 'come':674 'compromis':127,146 'confirm':614,852 'control':164,425,784,816,905 'converg':606 'core':92 'cortex':49,197,391 'cortic':357,681,783 'could':673 'counterevid':785 'coupl':209,635 'critic':170 'damag':151 'deep':77 'deficit':461 'degrad':249,450 'demonstr':666,837 'dentat':413 'depend':15,916 'depolar':158 'design':849 'direct':40,143 'disappear':901 'diseas':25,114,615,833 'disease-stag':832 'dispers':125 'displac':117 'disrupt':98 'downstream':61,199,430 'dysfunct':312,392 'earli':233,336,464,500,592 'ec':300,400,420,437,539,625,667,770,825,886 'ec-ii':419,538,885 'ec-tau':436,769 'ecii':275 'ecii-pv-ankyring-ais-integr':274 'eeg/meg':629 'effect':270 'efficaci':264,522 'encod':227 'endpoint':664,767,876 'engag':668,826,884 'enrich':272 'ensur':255 'entorhin':8,48,82,180,196,214,311,324,369,390,921 'entorhinal-hippocamp':179,920 'entrain':481,510 'essenti':134 'evalu':544 'evid':271,296,319,630 'ex':858 'exchang':819 'excitatori':447 'expect':730 'experi':845 'extern':157 'failur':882,889 'falsifi':881 'famili':304 'feasibl':501 'feed':412 'feedback':38,254 'fire':132,153,736 'first':549,851 'focus':5,31,281,789 'frame':702 'frequenc':131 'front':328 'function':240,622 'gamma':20,63,136,192,292,480,486,507,634,637,760,923 'gate':122 'general':680 'generic':310 'genet':812 'global':599,737 'grid':452 'grid-cel':451 'gyrus':414 'high':130,618 'high-frequ':129 'high-resolut':617 'hippocamp':19,62,181,200,221,291,627,746,922 'hippocampal-prefront':220 'human':361,511 'hyperexcit':580 'hyperphosphoryl':115 'hypothes':541 'hypothesi':27,691,912 'hypothesis-specif':690 'hz':479 'identifi':335 'ii':52,302,368,421,540,558,688,887 'ii-iii':51 'iii':53 'imag':623 'impair':241 'implic':532 'improv':660 'inaccess':86 'increas':735,822 'individu':260 'inform':841 'inhibit':744 'inhibitori':163 'initi':105,285,727 'integr':17,279,287,647,918 'interact':774 'interneuron':10,46,110,148,238,283,712 'interpret':693 'intervent':167,229,572,869 'intrins':152 'invas':76 'irrevers':247 'keep':878 'late':598 'later':399 'layer':50,301,367,401,557,687 'leav':521 'less':733 'leverag':67 'link':396,896 'lock':763 'loop':3,37,186,707,868 'loss':449 'lost':245 'machineri':154 'maintain':206 'make':418 'map':554 'marker':756 'market':787 'match':835 'materi':909 'maxim':262 'mechan':93,689 'mechanist':280,697 'mechanosensit':796 'mechanostimul':139 'medial':397 'mediat':97 'memori':460 'method':90 'microgli':492 'minim':266 'mnemon':648 'model':440,496,775,862 'modern':342 'molecular':57 'monitor':188 'mood':678 'mous':439 'nav':757 'navig':226 'near':843 'near-term':842 'network':176,456,576 'neural':512 'neurofibrillari':337 'neuromodul':469 'neuron':370,404,448 'neuropatholog':314,381 'non':75 'non-invas':74 'noninvas':506 'nonspecif':584 'occur':250 'off-target':267,780 'onset':378 'open':525 'optim':207 'optogenet':483 'organ':719 'oscil':64 'oscillatori':208,872 'output':403 'outsid':798 'p':611 'p-tau217':610 'pair':810 'paramet':204,257 'parvalbumin':43 'parvalbumin-posit':42 'path':410,646,749 'patholog':58,215,442,873,897 'pathophysiolog':261 'pathway':797 'perfor':407 'perisomat':162,743 'perturb':708 'pharmacolog':814 'phase':762 'phase-lock':761 'physiolog':888 'place':321 'plausibl':423 'pmid':382,384,432,466,497,527,529 'point':426 'popul':375 'posit':44 'power':193,638 'precis':72,172,742 'prefront':222 'preserv':168 'price':820 'produc':446 'profil':365 'project':562 'propag':766 'propos':28,552 'protect':716 'provid':156 'provision':808 'pv':9,45,109,147,237,276,282,711,753,799 'pv-specif':752 'pvalb':913 'question':526 'rather':427,595,683 'reach':81 'readout':590 'real':190,252 'real-tim':189,251 'reason':818 'recent':360 'recruit':144,792 'region':341 'remain':807 'remap':652 'reminisc':462 'report':366 'requir':605,776 'rescu':594 'resolut':619 'restor':12,60,161,219,710,741 'result':658 'review':388 'rhythmogenesi':137 'risk':582 'root':56 'scaffold':101,289 'scidex':534 'score':535 'second':569 'seed':345,348 'segment':106,286,728 'seizur':581 'select':373 'sensit':644 'sensori':485 'separ':547,649 'sham':777,904 'sham-control':903 'share':295 'sharp':698 'shift':574 'short':517 'short-term':516 'show':347,504 'signal':672 'simultan':218 'singl':317 'single-cel':316 'sleep':677 'sodium':123,721 'sodium-channel':720 'spatial':71,225,459,651 'specif':230,686,692,754,815,830 'spike':713 'spread':358 'stage':334,616,834,848 'state':493,577 'stellat':174 'stimul':89,256,487,508,778,906 'strong':601 'stronger':307 'structur':83,620 'studi':482,503 'subfield':628 'suffici':159,444 'superior':70 'support':476,602,654 'surfac':88 'synchroni':21,223,293,924 'system':187 'target':7,41,79,94,166,231,269,553,747,782,855 'task':473 'tau':96,116,344,438,441,608,765,771,892 'tau-medi':95 'tau-seed':343 'tau217':612 'tempor':171 'temporoammon':409 'term':518,844 'test':750,864 'tfus':33,68,141,700 'therapeut':234,263 'therefor':604 'theta':633 'theta-gamma':632 'third':587 'three':546 'time':191,253,714 'tissu':78,354 'togeth':838 'toler':519 'transcrani':4,30 'transentorhin':322 'transentorhinal/entorhinal':353 'tune':454 'type':364,560,804,829 'ultrasound':6,32,203,790 'upstream':213,424 'use':29 'valid':748 'variant':695 'vascular':793 'via':140 'vivo':859 'voltag':121 'voltage-g':120 'vulner':303,374,566 'weak':653 'weaken':910 'whether':550,570,588 'widespread':356 'window':235 'without':578,665 'work':346 'would':603,655,907 'yet':244","before":"'acoust':138 'adapt':258 'address':54,211 'adjust':202 'ai':16,107,275 'alzheim':23,112 'ankyr':14,100,118,273 'ankyring-depend':13,272 'approach':66,217 'axon':104 'bypass':149 'ca1':201 'capac':133 'caus':119 'cell':175 'channel':124 'circuit':182,248 'close':2,36,185 'closed-loop':1,35,184 'compromis':127,146 'control':164 'core':92 'cortex':49,197 'coupl':209 'critic':170 'damag':151 'deep':77 'degrad':249 'depend':15,274 'depolar':158 'direct':40,143 'diseas':25,114 'dispers':125 'displac':117 'disrupt':98 'downstream':61,199 'earli':233 'effect':270 'efficaci':264 'encod':227 'ensur':255 'entorhin':8,48,82,180,196,214,279 'entorhinal-hippocamp':179,278 'essenti':134 'extern':157 'feedback':38,254 'fire':132,153 'focus':5,31 'frequenc':131 'function':240 'gamma':20,63,136,192,281 'gate':122 'high':130 'high-frequ':129 'hippocamp':19,62,181,200,221,280 'hippocampal-prefront':220 'hyperphosphoryl':115 'hypothesi':27 'ii':52 'ii-iii':51 'iii':53 'impair':241 'inaccess':86 'individu':260 'inhibitori':163 'initi':105 'integr':17,276 'interneuron':10,46,110,148,238 'intervent':167,229 'intrins':152 'invas':76 'irrevers':247 'layer':50 'leverag':67 'loop':3,37,186 'lost':245 'machineri':154 'maintain':206 'maxim':262 'mechan':93 'mechanostimul':139 'mediat':97 'method':90 'minim':266 'molecular':57 'monitor':188 'navig':226 'network':176 'non':75 'non-invas':74 'occur':250 'off-target':267 'optim':207 'oscil':64 'oscillatori':208 'paramet':204,257 'parvalbumin':43 'parvalbumin-posit':42 'patholog':58,215 'pathophysiolog':261 'perisomat':162 'posit':44 'power':193 'precis':72,172 'prefront':222 'preserv':168 'propos':28 'provid':156 'pv':9,45,109,147,237 'pvalb':271 'reach':81 'real':190,252 'real-tim':189,251 'recruit':144 'restor':12,60,161,219 'rhythmogenesi':137 'root':56 'scaffold':101 'segment':106 'simultan':218 'sodium':123 'spatial':71,225 'specif':230 'stellat':174 'stimul':89,256 'structur':83 'suffici':159 'superior':70 'surfac':88 'synchroni':21,223,282 'system':187 'target':7,41,79,94,166,231,269 'tau':96,116 'tau-medi':95 'tempor':171 'tfus':33,68,141 'therapeut':234,263 'time':191,253 'tissu':78 'transcrani':4,30 'ultrasound':6,32,203 'upstream':213 'use':29 'via':140 'voltag':121 'voltage-g':120 'window':235 'yet':244"},"change_reason":"enrich EC-II vulnerability hypotheses with evidence addenda","created_at":"2026-04-21T02:54:50.595930+00:00"}]}