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Longevity supplements › Rapamycin and Aging › Studies

Animal study

In mice with an aged immune system, rapamycin eased aging markers and improved immunity

Yousefzadeh and colleagues · Nature · 2021

Original title: An aged immune system drives senescence and ageing of solid organs.

Under review. A person has not yet checked this summary against the paper. It is written from the PubMed abstract. Until a person checks it, search engines are asked not to list this page.

What the study found

Points to benefit

Rapamycin reduced markers of senescence in immune cells and improved immune function in these mice. The main finding is that an aged immune system can drive aging in other organs.

The study at a glance

Type of study
Animal study
Who or what was studied
Mice built to have an aged immune system early
What was tested
Rapamycin in mice with DNA-repair loss in blood cells (one part of a larger study)
What it measured
Lab tests or markers
Who has a stake
Company stake
Two authors co-founded NRTK Biosciences, a company developing senolytic drugs.
Journal
Nature, 2021
Source
PubMed record 33981041. This page is based on the abstract only.

How much this study counts

  • –Done in animals. Results in animals often do not carry over to people.
  • –Company stake: Two authors co-founded NRTK Biosciences, a company developing senolytic drugs.
  • •Summarized from the PubMed abstract only. The full paper may hold details the abstract leaves out.

✓ Strength– Limit• Note

These points come from fixed rules about the type of study, its size and length, what it measured, and who has a stake. Every study on Digestery gets the same rules.

Where this study sits

Each dot is one on-topic paper on this question. Steps near the top answer the question more directly.

↑ Stronger evidence

  1. Trials in people: aging and age-related decline

    3

    1 benefit, 1 mixed, 1 no difference

  2. Trials in people: other measures

    2

    2 no difference

  3. Trials in people: lab tests or safety

    2

    2 benefit

  4. Population studies

    1

    1 no direction

  5. Blood levels and genes

    0

    None among the papers we read.

  6. Animals

    2

    2 benefit

    ↑ This study is the ringed dot

↓ Weaker evidence

  • Points to benefit
  • Mixed
  • No difference
  • No direction
  • Points to harm

How it fits with the other research

The short answer to “Does rapamycin slow aging in people?”

Not shown in people.

Confidence: very low. Based on 16 on-topic papers.

Read the full answer

Few other papers sit on the same step, so there is little to compare it with.

  • Counted on the ladder, but not quoted in the page’s main findings.

Other papers on the same step

See all 16 studies on this question

How this page was made

Label

First read of the abstract
Claude Sonnet
Independent second read
Claude Haiku
Differences settled
The two reads agreed on every checked field. Claude Opus 5.5.
Headline
Claude Sonnet, from the checked study record. A script checked its numbers and wording.
Numbers
Checked against the abstract by a script
“How much this study counts”
Fixed rules, the same for every study
Source check by a person
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