Live·Open questions in longevity research

Immune cell

T cells

Immune cells that can mediate antigen-specific responses and cytotoxic attack

Hypotheses on this target 3

T cellsActivation. Hypotheses on this target 0Clearance restoration. Hypotheses on this target 0Reprogramming. Hypotheses on this target 0Adoptive transfer. Hypotheses on this target 0Elimination. Hypotheses on this target 11Immunosuppression. Hypotheses on this target 11Population balance. Hypotheses on this target 11

Elimination1

  • Dominant recalled immune cells can sustain infection by killing local support cells

    Where this hypothesis actsDominant recalled antigen specificity in affected tissues of older adults with discordant tissue infections

    What is proposedSelectively remove the dominant recalled cytotoxic population

    With whatNot stated in the record

    HowDeplete antigen-reactive cells in autologous infected tissue cultures, with matched add-back experiments

    Possible resultPossible restoration of pathogen control by existing alternative effectors without generating new clones

    2026-09-21

Immunosuppression1

  • Repeated skin repair primes immune attacks that impair later hair growth

    Where this hypothesis actsRepeatedly repaired skin after closure, when subsequent anagen exposes follicular descendants to attack

    What is proposedSuppress the antigen-specific T-cell response against follicular cells

    With whatNot stated in the record

    HowPostclosure interruption of the relevant T-cell response, with depletion tested in animals; pathogen and tumor defense must remain intact

    Possible resultPossible restoration of appendage output without replacing epithelial cells, and stabilization of SPV_5

    2026-09-21

Population balance1

  • Exposure order can cause chance loss of unfamiliar immune cells despite favorable average growth

    Where this hypothesis actsUnfamiliar clone founders in primary-cell cultures exposed to different antigen and environmental sequences

    What is proposedIncrease the initial number of otherwise identical unfamiliar founder cells

    With whatInstrument or assay

    HowTitrate founder numbers in limiting-dilution primary-cell cultures, maintaining total cell density with nonresponding cells

    Possible resultPossible reduction in complete clone loss without changing per-capita growth, recall abundance or antigen recognition

    2026-09-21