Competition for a shared gene regulator may preserve skin’s memory of stress order
Skin cells may retain stress-order memory through competition for the gene regulator p300, amplifying later inflammation and delaying barrier recovery. The proposed carrier of memory is ruled out if p300 allocation fully normalizes before function recovers.
Stage of verification
- Hypothesis published2026-09-25
- Indirect evidenceAssessed at 4 of 10
- Direct testAwaited
Map of the hypothesis
Hover over an icon or tap it to see its name.
Where in the body
Ageing mechanism
Kind of knowledge gap
A double ring marks the main placement where a group contains several values.
Target map
Every target of every published hypothesis, each with the actions a hypothesis can propose on it. The targets and the actions of this hypothesis are drawn solid.
Regulatory protein
p300
A nuclear transcriptional coactivator shared by competing transcriptional programs
Where this hypothesis actsSkin cells during recovery from sequential irritation and stretching, with resting functions in young ranges
Hypotheses on this target 2
Inhibition
Activation
Lower level
Higher level
Protection from degradation
Function restoration
Function preservation
What is proposed
Selectively disrupt binding to the dominant transcriptional programme
With whatNot stated in the record
HowBriefly interfere with binding during recovery to redistribute p300 to the competing programme; a general p300 inhibitor is insufficiently specific
Possible result
Possible elimination of the order-dependent response difference after the intervention is withdrawn
From the recordКратковременное селективное нарушение связывания доминирующей программы с p300 в период восстановления должно перераспределить его к конкурентной программе и устранить разницу ответа после отмены вмешательства.
All targets of the lab
Every target read from the published hypotheses, each kind around its pictogram. A larger mark means more hypotheses act on that target. Point at a mark and the actions proposed on it branch out of it.
Solid and named: the targets of this hypothesis
Explore in depth
The logic
The train of thought that ends in this hypothesis. Each stage is the reason the next exists. The master question narrows to a goal, the goal to an unknown nobody has closed, the unknown to the hypothesis proposed here. Every step below says what it rests on and what carries it.
Skin that appears recovered could still respond differently depending on which stresses came first. The unexpected move is to locate that memory in competition between two gene-control programs for p300, a shared protein that helps activate genes inside the cell nucleus. This is a proposal generated by the pipeline, not a measured explanation of skin aging or recovery.
- The first stress is proposed to build groups of molecules that recruit p300 to one gene-control program.
- Those groups are proposed to decay slowly, leaving altered access to p300 when the second stress activates the competing program.
- Different decay rates would make irritation followed by stretching leave a different allocation from stretching followed by irritation.
- Resting skin functions would return to normal while the altered allocation persists, separating apparent recovery from recovery of the proposed memory carrier.
- The retained allocation would amplify inflammation after the next identical stress and delay repair of the skin's protective barrier.
- Selectively interrupting the stronger program's recruitment of p300 during recovery is predicted to redistribute the protein and remove the later response difference even after the interruption ends.
Two repair crews share a tool cupboard, and the first crew leaves reservations attached to tools after its visible work is finished. The next job therefore starts with a different division of tools depending on which crew worked first.
Where the picture breaks: Cells make no deliberate reservations. The proposal requires persistent molecular binding and a particular sharing rule; neither follows from the tool-cupboard picture.
- Master questionstep 01 of 04
The intended therapy would bring the functional condition of middle-aged human skin toward that of young people.
Rests on: The supplied goal explicitly names this therapeutic outcome.
Stated in the chain - Goal pillarstep 02 of 04
Youthful skin function is framed here as resistance to everyday stresses amplifying one another.
Rests on: The goal concerns functional improvement, but does not define resistance to interacting stresses as a measure of youthful function.
AssumptionThe chain assumes that resistance to mutually amplifying everyday stresses is a relevant component of the desired youthful condition; no comparison between young and middle-aged skin is supplied.
- Gap questionstep 03 of 04
Irritation followed by stretching might leave a different lasting effect from stretching followed by irritation, even after every measured function returns to a young reference range. The question is whether changing the order removes an exaggerated response to the next identical stress.
Rests on: The preceding stage identifies amplification between everyday stresses as the problem; this question makes stress order and apparent recovery the conditions under examination.
Stated in the chain - Hypothesisstep 04 of 04
Competition for p300 is proposed to preserve the order of irritation and stretching. Slowly disappearing groups of molecules that recruit this protein would leave the inflammation-related and stretch-responsive gene programs with different access to it, increasing later inflammation and delaying repair of the skin's protective barrier despite normal resting measurements.
Rests on: The preceding question supplies the proposed persistence after apparent recovery. The endpoint supplies its explanatory basis: proportional sharing of a common protein pool, extended with different formation and decay rates for the molecules that recruit it.
Stated in the chain
What is carried, and what is not. Neither screened source directly establishes any of the six proposed mechanism links. S2, an abstract from Molecular Endocrinology (2005), reports delayed wound healing and increased inflammation in genetically altered mice whose modified gene-control protein could not recruit p300, but does not isolate competition for p300 or establish stress-order memory; S3, in Journal of Virology (2020), links changes in cells with failed division to a viral protein destabilizing p300, but does not establish the proposed competition, skin-barrier effects, or the sequence end to end.S2S3
Where the reasoning is carried by something unstated · 1
- Goal pillar. The chain assumes that resistance to mutually amplifying everyday stresses is a relevant component of the desired youthful condition; no comparison between young and middle-aged skin is supplied.
How a result here could mislead · 3
- A smaller later inflammatory response after disrupting p300 binding could reflect lingering suppression of gene activity rather than erasure of stress-order memory. A drug that broadly inhibits p300 would make this distinction especially difficult. What closes it: The test must verify selective disruption of the intended interaction, redistribution toward the competing program, and removal of the intervention before the next stress. The proposed restoration of binding must also restore the order-dependent effect; general loss of responsiveness must be distinguished from loss of the difference between orders.
- Persistence after moving cells onto a common fresh extracellular matrix, the supporting material outside cells, could be credited to p300 even though the rival explanation involving cellular clocks could also remain inside the transferred cells. What closes it: Transfer must be accompanied by measurements of p300 allocation and the relative timing of the cells' daily molecular cycles. The supplied prediction also requires testing whether synchronizing those cycles alone removes the difference, and whether cell-free supporting material can transfer it.
- An order-dependent difference measured during incomplete recovery could be mistaken for memory that survives recovery. An unspecified definition of recovery would allow the testing time to determine the apparent result. What closes it: The measured functions, young reference ranges, and recovery criterion must be fixed before the comparison. Recruitment-complex persistence and p300 allocation must be tracked through that point; the supplied material provides no numerical recovery thresholds or operational definition of its named target, SPV_1.
What would make this wrong. The proposed memory carrier would be excluded if the recruitment complexes and p300 allocation fully return to their prior state before functional recovery, while an order-dependent response still persists afterward. Transfer of the effect through cell-free supporting material, or its removal solely by synchronizing cellular clocks, would contradict the endpoint's stated distinguishing predictions. These observations would challenge this mechanism, not the broader goal of improving middle-aged skin.
What it would change. If this held, restoring youthful-looking resting measurements would leave an additional therapeutic task: restoring how skin responds to sequences of everyday stresses. Work toward the master goal would have to assess later responses after apparent recovery and consider persistent competition for gene-control resources. Even a successful cell test would not establish that this mechanism explains differences between middle-aged and young human skin, or that altering it produces durable improvement in people.
Sources read · 2
Selective expression of a dominant-negative form of peroxisome proliferator-activated receptor in keratinocytes leads to impaired epidermal healing. · Molecular endocrinology (Baltimore, Md.) · 2005
“This dn PPARalpha lacks the last 13 C terminus amino acids, binds to a PPARalpha agonist, but is unable to release the nuclear receptor corepressor and to recruit the coactivator p300. When selectively expressed in keratinocytes of transgenic mice, dn PPARalphaDelta13 causes a delay in the healing of skin wounds, accompanied by an exacerbated inflammation.”
Does not settle: Источник не устанавливает конкуренцию NF-κB и YAP/TEAD за p300, влияние порядка нагрузок, сохранение памяти стресса, изменения барьерного восстановления или стабилизацию SPV_1. Данные относятся к трансгенным мышам с нарушенной функцией PPARalpha в кератиноцитах.
Beta Human Papillomavirus 8E6 Attenuates LATS Phosphorylation after Failed Cytokinesis. · Journal of virology · 2020
“These phenotypes were dependent on β-HPV 8E6 destabilizing p300 and did not completely attenuate the HP.”
Does not settle: Источник не изучает конкуренцию p300 между NF-κB и YAP/TEAD, порядок нагрузок, устойчивые комплексы привлечения p300, воспалительный ответ, восстановление кожного барьера или SPV_1. Опыты описаны для клеточных моделей с β-HPV 8E6 и нарушением цитокинеза.
The gap this hypothesis explains
Something is claimed here, but it rests on evidence too thin to carry weight.
Does recovered skin remember irritation and stretching order, and does reversing them prevent stronger responses to identical stress?
Original wording · exactly as the pipeline generated it
Сохраняет ли кожа память последовательности раздражения и растяжения после возвращения всех измеряемых функций в молодые диапазоны, и устраняет ли перестановка воздействий усиленный ответ на следующую одинаковую нагрузку?
What this question is asking
The question asks whether skin’s previous experiences can affect its next response even after its measured functions appear fully restored. It compares irritation followed by stretching with stretching followed by irritation, asking whether the order changes the response to an identical later load. Before that later load, all measured functions would need to return to ranges seen in young skin, within recovery times seen in young skin. The pipeline assumes that existing work on inflammatory and mechanical memory provides a basis for this possibility, but whether either memory preserves the order of these particular exposures remains part of the question.
- Irritation, stretching, friction, and load
- Irritation is an exposure that provokes a skin reaction; stretching pulls skin so that it extends; friction is rubbing against its surface. A load is the later challenge used to measure a response. These exposures are not interchangeable, and the input does not specify their intensity or duration.
- Inflammation
- A tissue response involving protective cells and signals after disturbance or injury. Its disappearance is one possible sign of recovery, but the supplied findings distinguish it from disappearance of every lasting cellular change.
- Inflammatory memory, mechanical memory, and exposure-order memory
- These terms refer to lasting effects of earlier inflammation, physical forces, or the sequence of exposures on later behavior. They describe forms of biological persistence rather than conscious recollection; evidence for one does not establish the others.
- Young-skin ranges and recovery times
- The measurement ranges and time needed to recover that would serve as references from young skin. The input does not specify the reference population, measurements, or acceptable limits.
- Enhanced wound response
- A greater response to injury in previously exposed skin. The supplied S2 excerpt does not identify the measurement or establish that greater response means greater damage.
- Psoriasis and resolved disease
- Psoriasis is an inflammatory skin disease. Resolved disease here means that its visible manifestations have subsided; S1 concerns how disease can subsequently recur.
- Keratinocytes
- Cells that form much of the skin’s outer covering. S3 attributes the capacity for inflammatory memory to these cells.
- Chromatin accessibility and genomic sites
- Chromatin is the packaged material containing genetic information inside cells; accessibility describes how available parts of that material are to cellular machinery. Genomic sites are particular locations in that genetic material. S4 reports that some locations affected by inflammation remain accessible afterward.
- Transcription and baseline
- Transcription is the copying of genetic instructions into working messages used by cells. Baseline is a reference level before or outside the disturbance; returning to it does not necessarily mean reaching a level measured in young skin.
- Mast cells and skin-connected neurons
- Mast cells are immune cells involved in tissue reactions, and neurons are nerve cells that carry signals. S6 reports altered functioning of both in mouse offspring after maternal stress.
- Prenatal stress and eczema
- Prenatal means before birth; in S6, the stress affected pregnant mice. Eczema is an inflammatory skin condition that their offspring developed after friction in the reported finding.
- Homeostatic values and skin expansion
- Homeostatic values are measurements associated with a tissue’s usual maintained state, which need not be a youthful state. Skin expansion here means enlargement under stretching; S10 reports selected measurements returning to their usual values during that process.
Mechanical and inflammatory memory are already represented in existing work, while intervals between exposures are based on observed recovery.
The pipeline assumes that skin can retain effects of earlier physical or inflammatory exposures and that current recovery measurements guide when another exposure occurs. That would provide a starting point for asking whether apparently recovered skin still carries information about exposure order. It would not itself establish that recovery measurements match young skin or that the order is remembered.
S3 reports inflammatory memory in skin cells, and S4 describes a lasting molecular change after inflammation subsides and gene activity largely returns to its previous level. S10 reports selected measurements returning to their usual values after stretching, but its supplied excerpt does not establish mechanical memory. None of the supplied excerpts establishes the claimed framework for adjusting exposure intervals, recovery of every measured function to young-skin ranges, or memory of irritation and stretching order.S3S4S10
The same question asked without the part nothing read establishes:
- After measured skin functions return to young-skin ranges within young-skin recovery times, does reversing irritation and stretching change the response to an identical later load?
- Does irritation followed by stretching produce a different response to an identical later load than stretching followed by irritation?
- Order matters, and reversal removes the stronger response Under this conditional outcome, the exposure sequence would leave a lasting difference despite recovery of the measured functions. Reversing the sequence would remove the stronger later response, so those recovery measurements alone would not fully describe skin’s readiness for another load.
- Order matters, but reversal only changes the response Both sequences could leave a stronger later response, with its size depending on their order. Reversal would then alter the effect without eliminating it, and apparent recovery would still leave part of the subsequent response unexplained.
- A stronger response persists regardless of order Previous exposure would affect the later response, but the comparison would not establish memory of exposure order. Reversing irritation and stretching would not remove the stronger response.
- No stronger response remains after recovery Under the tested recovery conditions, the later identical load would not reveal the proposed heightened response. This would leave no such response for reversal to eliminate, without establishing the same result for other loads or recovery periods.
The concern is that recovery of current measurements could leave a lasting change in how skin responds to the next exposure. If that change depends on exposure order, two histories ending with the same measurements could still produce different responses to an identical later load. Treating those histories as equivalent could therefore misrepresent how completely skin has recovered. However, a stronger response alone would not establish impending damage: the supplied material does not establish that connection or an early warning sign that precedes damage.
Механическая и воспалительная память представлены на RL-1; адаптивные интервалы RL-3 ориентируются на наблюдаемое восстановление.
Между эпизодами восстановление должно завершаться в молодые сроки; ранний признак скрытого срыва должен появляться до повреждения при повторных нагрузках.
Не установлено, исключает ли нормализация текущих функций скрытую зависимость следующего ответа от предыдущей последовательности нагрузок.
The mechanism it proposes
The engine's own statement of the hypothesis, in full.
CROSS-DOMAIN TRANSFER. Порядок нагрузок изменяет распределение общего ядерного коактиватора p300 между воспалительной программой NF-κB и механочувствительной программой YAP/TEAD. Предполагается, что первая нагрузка оставляет медленно исчезающие комплексы привлечения p300; следующая программа получает доступ с учётом уже изменившихся относительных приоритетов. При нормальных показателях покоя это распределение усиливает воспалительный ответ на следующую пробу и задерживает восстановление барьера. Изменение конкуренции за p300 должно стабилизировать SPV_1.
Where the idea comes from
The hypothesis borrows a result from another field. This is what it borrows, and from where.
Экономика распределения и теория аукционов: правило пропорционального распределения Келли, x_i(t)=C·b_i(t)/Σ_j b_j(t). C означает измеренный доступный пул p300 в ядре; i и j обозначают конкурирующие транскрипционные программы; x_i означает количество p300, связанное с регуляторными участками программы i; b_i означает экспериментально измеренную относительную способность её комплексов привлекать p300; t означает время. Для памяти предлагается отдельное биологическое расширение db_i/dt=α_i·u_i(t)−β_i·b_i: u_i означает активность входного сигнала, α_i скорость образования комплексов привлечения, β_i скорость их распада. При разных β_i порядок импульсов оставляет разные b_i. Переносится правило распределения; рациональность участников и денежные платежи биологии не приписываются. Само аукционное правило памятью не обладает. Источник модели: [Welfare guarantees for proportional allocations](https://arxiv.org/abs/1402.3447).
Testing and possible results
The prediction that would tell it apart
A hypothesis that predicts what its rivals predict is not worth running an experiment over. This is the observation on which this one differs.
При переносе клеток на общий свежий матрикс различие между AB и BA сохраняется и сопровождается разным распределением p300 между регуляторными участками двух программ при сопоставимом общем количестве белка. Кратковременное селективное нарушение связывания доминирующей программы с p300 в период восстановления должно перераспределить его к конкурентной программе и устранить разницу ответа после отмены вмешательства. Восстановление связывания должно вернуть эффект. Удвоение измеренной силы привлечения одной программы должно изменить отношение выделенных долей согласно модели. Передача эффекта бесклеточным матриксом или его устранение исключительно выравниванием циркадных фаз противоречит этой гипотезе.
Would tell it apart from at least one rival. The prediction specifies observable differences, redistribution of p300, loss and restoration of the response difference, and explicit rejection conditions. No rival prediction is supplied. Only a bench experiment would settle it.
What testing it would take
The engine's own read on whether this is testable with methods that already exist.
В первичных клетках доступны измерение связывания p300 с хроматином, регистрация новой транскрипции и вмешательства в белковые взаимодействия. Необходимо отдельно проверить длительность существования комплексов: если распределение полностью нормализуется до функционального восстановления, предложенный носитель памяти исключается. Общий ингибитор p300 недостаточно специфичен для решающего опыта.
Other explanations
Every other hypothesis the engine wrote for the same gap, and the observation that would separate the two.
При переносе клеток на общий свежий матрикс различие между AB и BA сохраняется и сопровождается разным распределением p300 между регуляторными участками двух программ при сопоставимом общем количестве белка. Кратковременное селективное нарушение связывания доминирующей программы с p300 в период восстановления должно перераспределить его к конкурентной программе и устранить разницу ответа после отмены вмешательства. Восстановление связывания должно вернуть эффект. Удвоение измеренной силы привлечения одной программы должно изменить отношение выделенных долей согласно модели. Передача эффекта бесклеточным матриксом или его устранение исключительно выравниванием циркадных фаз противоречит этой гипотезе.
- Rival 01 of 02What would separate them
Fibronectin shapes and binding-site access may store stress order and amplify skin responses predicts: После последовательностей раздражение → растяжение и растяжение → раздражение матриксы с сопоставимыми исходной жёсткостью, гидратацией и составом очищают от клеток и заселяют одинаковыми необученными клетками. Разница ответа на общую пробу должна следовать за матриксом. В дополнительной ветви обратную последовательность воспроизводят на бесклеточном матриксе через соответствующие механические и окислительные воздействия: она должна устранить разницу после заселения новыми клетками. Перенос эффекта только с клетками при подтверждённом сохранении структуры матрикса опровергнет гипотезу в пользу another hypothesis of the same gap или another hypothesis of the same gap.
- Rival 02 of 02What would separate them
The order of irritation and stretching may shift skin cell clocks and alter barrier recovery predicts: В отдельных параллельных культурах после AB и BA регистрируют циркадные репортёры и проводят единственную пробу C в разные моменты двух последующих суток. Разница ответа должна периодически уменьшаться и менять знак в соответствии с измеренными фазами. Выравнивание фаз обеих клеточных популяций должно устранить различие AB и BA после прекращения синхронизирующего воздействия. В контрольных ветвях синхронизация должна оставлять сопоставимыми матрикс и распределение p300. Стабильный однонаправленный эффект, сохраняющийся после подтверждённого выравнивания фаз, опровергнет эту гипотезу.
What stands behind it
Which of the figures above have a study behind them, which are the engine's own, and what it would take to refute the hypothesis. This audit never judges the idea.
This hypothesis states no figure and cites no study, so there is nothing here to trace.
What it would take to refute it. Nothing already retrieved carries the prediction’s terms and it names no measurement this layer can route to a public dataset, so the bench is the residual — not a finding against it.
6 papers retrieved around this hypothesis
- Investigating the functional components of YAP condensates.PMID 42126959 · full_text · 60,152 characters stored
- Regulation of YAP activity by nuclear G-actin binding.PMID 41854080 · full_text · 86,362 characters stored
- Cyclin K condensates bridge CDK12 to phosphorylate and drive oncogenic YAP activation in hepatocellular carcinoma.PMID 42397909 · full_text · 94,544 characters stored
- The mechano-immunological landscape in the tumor microenvironment: From mechanical sensing to a new therapeutic paradigm.PMID 42293388 · full_text · 147,854 characters stored
- The Roles of Protein <i>S</i>-Palmitoylation in Cancers: From Dynamic Modulation to Therapeutic Potential.PMID 41938591 · full_text · 168,525 characters stored
- Mechanotransduction in intervertebral disc degeneration: from compartment-specific sensors to translational frontiers.PMID 42528914 · full_text · 113,641 characters stored
0 citation handles extracted; 1 Europe PMC search run; 8 records examined; 6 sources stored for enrichment, 6 with full text. A citation that did not resolve is a bibliographic failure, not proof that no such paper exists, and no hypothesis is blocked by this audit.