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Study · In vitro (cells) · 2003

7 results

Humanin peptide suppresses apoptosis by interfering with Bax activation.

Guo B, Zhai D, Cabezas E, Welsh K, Nouraini S, Satterthwait AC, Reed JC

Nature4 May 2003Cited by 503 (Europe PMC)

Summary

The text of this summary is not shown here, because the article license does not allow reuse. Read it at the source (opens in a new tab)

Text rights: Publisher copyright. Results still quote short attributed sentences.

Results from this study7

5 results from studies that gave the peptide. No result from this study comes from people.

  1. 01LabIn vitro (cells)Mechanism

    Bax interacts with humanin, an anti-apoptotic peptide of 24 amino acids.

    In plain wordsIn lab tests, humanin was found to bind the cell-death protein Bax.

    Peptide
    Humanin
    Outcome
    Not applicableBax interaction with humanin
    Study

    n: not reported in source

    cells
    Outcome group
    Receptor activity and mechanism · Whole body
    Studied dose
    Dose not stated

    Source sentences

    Summary
    Here we show that Bax interacts with humanin (HN), an anti-apoptotic peptide of 24 amino acids encoded in mammalian genomes.
  2. 02LabIn vitro (cells)Mechanism

    In cells, humanin prevented the translocation of Bax from cytosol to mitochondria.

    In plain wordsIn cells, humanin stopped the cell-death protein Bax from moving to the mitochondria.

    Peptide
    Humanin
    Outcome
    DecreaseBax translocation from cytosol to mitochondria
    Study

    n: not reported in source

    cells
    Outcome group
    Receptor activity and mechanism · Whole body
    Studied dose
    Dose not stated

    Source sentences

    Summary
    HN prevents the translocation of Bax from cytosol to mitochondria.
  3. 03LabIn vitro (cells)Mechanism

    The mitochondrial version of humanin, encoded by an identical open reading frame, also bound and suppressed Bax.

    In plain wordsIn cells, the mitochondria-made version of humanin also bound and held back the cell-death protein Bax.

    Peptide
    Humanin
    Outcome
    DecreaseBax binding and suppression by mitochondrial version of humanin
    Study

    n: not reported in source

    cells
    Outcome group
    Receptor activity and mechanism · Whole body
    Studied dose
    Dose not stated

    Source sentences

    Summary
    Notably, the mitochondrial genome contains an identical open reading frame, and the mitochondrial version of HN can also bind and suppress Bax.
  4. 04LabIn vitro (cell-free)Mechanism

    Humanin peptides blocked Bax association with isolated mitochondria.

    In plain wordsIn lab tests, humanin peptides stopped the cell-death protein Bax from attaching to isolated mitochondria.

    Peptide
    Humanin
    Outcome
    DecreaseBax association with isolated mitochondria
    Study

    n: not reported in source

    isolated mitochondria
    Outcome group
    Receptor activity and mechanism · Whole body
    Studied dose
    Dose not stated

    Source sentences

    Summary
    HN peptides also block Bax association with isolated mitochondria, and suppress cytochrome c release in vitro.
  5. 05LabIn vitro (cell-free)Mechanism

    Humanin peptides suppressed cytochrome c release in vitro.

    In plain wordsIn lab tests, humanin peptides reduced the release of cytochrome c, a cell-death signal.

    Peptide
    Humanin
    Outcome
    DecreaseCytochrome c release in vitro
    Study

    n: not reported in source

    isolated mitochondria
    Outcome group
    Receptor activity and mechanism · Whole body
    Studied dose
    Dose not stated

    Source sentences

    Summary
    suppress cytochrome c release in vitro.
    1 context sentence
    Summary · context
    HN peptides also block Bax association with isolated mitochondria

Studies that did not test the peptide alone2

In this study, Humanin was a lab tool or a carrier, part of a mix, or the subject of a lab method. These results are not evidence about taking Humanin.

  1. 06LabNot a test of Humanin aloneIn vitro (cells)Mechanism

    Reducing humanin expression with small interfering RNAs sensitized cells to Bax.

    In plain wordsIn cells, lowering humanin production made cells more sensitive to the cell-death protein Bax.

    Peptide
    Humanin
    Outcome
    IncreaseSensitivity of cells to Bax after humanin knockdown
    Study

    n: not reported in source

    cells
    Outcome group
    Receptor activity and mechanism · Whole body

    Source sentences

    Summary
    reducing HN expression by small interfering RNAs sensitizes cells to Bax

    In this study, Humanin was a lab tool or a carrier, part of a mix, or the subject of a lab method. This result is not evidence about taking Humanin.

  2. 07LabNot a test of Humanin aloneIn vitro (cells)Mechanism

    Reducing humanin expression with small interfering RNAs increased Bax translocation to membranes.

    In plain wordsIn cells, lowering humanin production let more of the cell-death protein Bax move to membranes.

    Peptide
    Humanin
    Outcome
    IncreaseBax translocation to membranes after humanin knockdown
    Study

    n: not reported in source

    cells
    Outcome group
    Receptor activity and mechanism · Whole body

    Source sentences

    Summary
    Conversely, reducing HN expression by small interfering RNAs sensitizes cells to Bax and increases Bax translocation to membranes

    In this study, Humanin was a lab tool or a carrier, part of a mix, or the subject of a lab method. This result is not evidence about taking Humanin.

AI wrote and checked these results. AI can make mistakes, so check important results against the source.

Version history

PepBank keeps every version of the data on this study. Status changes from Retraction Watch, Europe PMC and Crossref are listed with their source.

  1. Version 2Current

    13 Oct 2026, 21:44 UTC

    Study results updated

  2. Version 1

    13 Oct 2026, 16:31 UTC

    First added · source update from Europe PMC

Subjects

Terms as the source lists them.

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