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Study · Measured the body's own peptide · 1984

5 results

Immunochemical studies on thymosin: radioimmunoassay of thymosin beta 4.

Naylor PH, McClure JE, Spangelo BL, Low TL, Goldstein AL

Immunopharmacology1 Feb 1984Cited by 42 (Europe PMC)

PMID6715146 (opens in a new tab)DOI10.1016/0162-3109(84)90003-1 (opens in a new tab)PepBankPUB-06715146
Publisher pagePubMedAsk about this study
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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 study5

No result from this study comes from a test of the peptide.

Natural levels measured3

These results measure the body's own peptide. Nobody was given the peptide. They are not evidence about taking it. They are left out of key results, evidence counts and charts.

  1. 01HumanEndogenous levelObservational studyOther

    Serum levels of thymosin beta‑4 in humans ranged from 450 to 1100 ng/ml.

    In plain wordsIn people, the body's own thymosin beta‑4 in blood serum ranged from 450 to 1100 ng/ml.

    Peptide
    Thymosin beta-4 (human)
    Outcome
    Not applicableSerum thymosin beta 4 level
    Study

    n: not reported in source

    human serum
    Outcome group
    Endogenous peptide levels · Whole body

    Measurements

    Serum thymosin beta 4
    450 to 1100 ng/ml
    human serum

    Source sentences

    Summary
    Levels in serum range from 450 to 1100 ng/ml

    This result measures the body's own Thymosin beta-4 (human). Nobody was given the peptide. It is not evidence about taking it.

  2. 02HumanEndogenous levelObservational studyOther

    Serum levels of thymosin beta‑4 decline with age.

    In plain wordsIn people, the body's own thymosin beta‑4 in blood serum is linked to lower levels at older ages.

    Peptide
    Thymosin beta-4 (human)
    Outcome
    DecreaseSerum thymosin beta 4 with age
    Study

    n: not reported in source

    human serum
    Outcome group
    Aging markers · Aging and longevity

    Source sentences

    Summary
    Levels in serum range from 450 to 1100 ng/ml and decline with age.

    This result measures the body's own Thymosin beta-4 (human). Nobody was given the peptide. It is not evidence about taking it.

  3. 03HumanEndogenous levelObservational studyOther

    HPLC of human serum samples showed two thymosin beta‑4 cross-reactive species.

    In plain wordsIn people, blood serum held two substances that react in a test for the body's own thymosin beta‑4.

    Peptide
    Thymosin beta-4 (human)
    Outcome
    Not applicableThymosin beta 4 cross-reactive species in serum
    Study

    n: not reported in source

    human serum
    Outcome group
    Endogenous peptide levels · Whole body

    Source sentences

    Summary
    High performance liquid chromatography of serum samples indicates that two thymosin beta 4 cross-reactive species are present in human serum.

    This result measures the body's own Thymosin beta-4 (human). Nobody was given the peptide. It is not evidence about taking it.

Studies that did not test the peptide alone2

In this study, Thymosin beta-4 (human) 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 Thymosin beta-4 (human).

  1. 04LabNot a test of Thymosin beta-4 (human) aloneIn vitro (cell-free)Other

    The radioimmunoassay for thymosin beta‑4 is sensitive in the nanogram range.

    In plain wordsIn lab work, a new blood test for thymosin beta‑4 can detect nanogram amounts.

    Peptide
    Thymosin beta-4 (human)
    Outcome
    Not applicableRadioimmunoassay sensitivity
    Study

    n: not reported in source

    radioimmunoassay
    Outcome group
    Analytical methods and detection · Pharmacology

    Source sentences

    Summary
    The radioimmunoassay is sensitive in the nanogram range and no cross-reactivity with common serum proteins is demonstrable.

    In this study, Thymosin beta-4 (human) 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 Thymosin beta-4 (human).

  2. 05LabNot a test of Thymosin beta-4 (human) aloneIn vitro (cell-free)Other

    The radioimmunoassay for thymosin beta‑4 showed no demonstrable cross-reactivity with common serum proteins.

    In plain wordsIn lab work, a new thymosin beta‑4 blood test did not react with common serum proteins.

    Peptide
    Thymosin beta-4 (human)
    Outcome
    Not applicableRadioimmunoassay cross-reactivity
    Study

    n: not reported in source

    radioimmunoassay
    Outcome group
    Analytical methods and detection · Pharmacology

    Source sentences

    Summary
    The radioimmunoassay is sensitive in the nanogram range and no cross-reactivity with common serum proteins is demonstrable.

    In this study, Thymosin beta-4 (human) 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 Thymosin beta-4 (human).

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, 01:52 UTC

    Study results updated

  2. Version 1

    12 Oct 2026, 18:17 UTC

    First added · source update from Europe PMC

Subjects

Terms as the source lists them.

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