Aging

Regeneration · Brain · Function

Clear harmful proteins. Preserve working synapses?

We assess TIMP2 as a candidate for selective protein clearance: less harmful cargo, preserved synapses, better function. A decisive experiment must determine whether it works.

Explore the findings →For leading experts

Axolotl: a model organism for regeneration research. This portrait provides context; it does not show an experimental result. · LoKiLeCh · CC BY-SA 3.0 Unported · Commons

Three findings that sharpen the next question

Mouse; genetic interventions and TIMP2 administration

TIMP2 changes how microglia handle cargo

TIMP2 affected microglial states and cargo processing in mice. The study also includes a myelin clearance assay following genetic deletion.

Selective removal of harmful synaptic cargo as a cause of functional recovery remains unresolved.
Hemmer, Philippi et al. · 12 Aug 2026

Mouse; neuron-specific protein labeling

Protein stock does not establish degradation flux

Neuronal labeling tracks slowly degraded proteins into microglia. For our model, the key issue is that increased stored cargo can have different causes.

Uptake, degradation and export require separate measurement; this is our methodological inference.
Guldner et al. · 21 Jan 2026

C57BL/6 and SAMP8 mice

Better markers do not establish memory recovery

Urolithin A improved molecular measurements in aged C57BL/6 mice without demonstrating recovery in the memory tests examined.

Early/late comparisons also differ by mouse strain. They establish neither a universal timing window nor proven absence of an effect.
Jara et al. · 5 Mar 2026

The next testable objective

AG-T01: Improve degradation and protect functional synapses

Test whether TIMP2 improves neuronal function in the aged hippocampus through microglial degradation of harmful cargo. Success requires all three: demonstrated degradation, preserved functional synapses and better plasticity. This is a testable project proposal, not a confirmed therapy.

01 · MechanismWhich cause can actually be changed?

02 · ChallengeWhat finding would refute the model?

03 · FunctionIs measurable performance preserved?

04 · TranslationIs the benefit durable and safe?

Read the balance model and decisive test →

Where does the project stand?

⚪ 1 · Literature🔵 2 · Testable synthesis🟢 3 · Partial result🟣 4 · Breakthrough🟡 5 · Discovery

Currently assigned: levels 1 and 2. Levels 3–5 have not been reached. Project significance and evidence are separate; a strong hypothesis remains untested. Understand the levels →

Two perspectives on regeneration

A neuron diagram provides orientation for research on proteins and cell function. It is neither a micrograph nor a comparison of young and old cells. · explorebiology (Explore Biology) · CC BY 4.0 International · Commons

From cells to lasting function

The axolotl shows that complex regeneration is biologically possible. In the aging brain, we ask which processes might preserve or restore function. The neuron illustration explains structure; it is not an image produced by this project.

Axolotl & regeneration →

Brain & proteins →

Researchers explain the foundations

Institutional talks for context. These older videos are background material; current claims rely on the linked primary studies.

Axolotl regeneration

Science Communication Lab · 2018-02 (recorded) · Elly Tanaka examines the experimental questions behind axolotl regeneration. Recorded in 2018; English, 27:57. Use it as methodological background and compare it with the world's current studies.
YouTube

Brain aging in its systemic context

Stanford · 2016-11-10 · Tony Wyss-Coray discusses systemic influences on the aging brain. Stanford lecture, published November 10, 2016; English. Historical research background; results in old mice do not establish efficacy in humans.
YouTube

Go deeper

Sources & methods
19 selected primary studies in the register, including explicitly marked preprints. The current deep dive considers new literature from August 2026. This is a targeted, non-exhaustive search. Observations, hypotheses and proposed models remain distinct. Study register →

Aging / Altern research world · Updated 2026-09-28 · Research, not personal treatment advice.

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