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Study · Measured the body's own peptide · 2018

3 results

Effect of vitamin A deficiency on thymosin-β4 and CD4 concentrations.

El-Zayat SR, Sibaii H, Mahfouz NN, Sallam SF, Fahmy RF, Abd El-Shaheed A

Journal, genetic engineering & biotechnology10 Oct 2017Cited by 6 (Europe PMC)

PMID30647705 (opens in a new tab)PMCIDPMC6296595 (opens in a new tab)DOI10.1016/j.jgeb.2017.10.007 (opens in a new tab)PepBankPUB-30647705
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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: CC BY-NC-ND. Results still quote short attributed sentences.

Results from this study3

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 studyMechanism

    In adults with vitamin A deficiency, serum levels of the body's own thymosin beta‑4 were significantly lower than in healthy subjects.

    In plain wordsAdults with vitamin A deficiency had lower levels of the body's own thymosin beta‑4 in blood than healthy adults.

    Peptide
    Thymosin beta-4 (human)
    Outcome
    DecreaseSerum thymosin beta-4 in vitamin A deficiency
    Study

    n = 40

    Comparator
    Healthy subjects with normal vitamin A
    Outcome group
    Immune response · Immune and inflammation

    Source sentences

    Summary
    Results showed a significant decrease in serum levels of Tβ4 and CD4 in group 2 than group 1 at P < .003 and P < .019 respectively.
    2 context sentences
    Summary · context
    Group 1 with vitamin A at level >200 µg/dl consists of 10 healthy subjects.
    Summary · context
    Group 2 with vitamin A deficiency at level <50 µg/dl consists of 30 subjects.

    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 studyMechanism

    In adults, serum levels of the body's own thymosin beta‑4 correlated positively with vitamin A level.

    In plain wordsIn adults, higher vitamin A levels were linked to higher levels of the body's own thymosin beta‑4 in blood.

    Peptide
    Thymosin beta-4 (human)
    Outcome
    Not applicableCorrelation of serum thymosin beta-4 with vitamin A level
    Study

    n = 40

    Outcome group
    Immune response · Immune and inflammation

    Source sentences

    Summary
    Both of Tβ4 and CD4 had positive correlation with vitamin A level at P < .000 and P < .003 respectively as well as with each other at p < .000.
    2 context sentences
    Summary · context
    Group 1 with vitamin A at level >200 µg/dl consists of 10 healthy subjects.
    Summary · context
    Group 2 with vitamin A deficiency at level <50 µg/dl consists of 30 subjects.

    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 studyMechanism

    In adults, serum levels of the body's own thymosin beta‑4 correlated positively with CD4 levels.

    In plain wordsIn adults, higher CD4 levels were linked to higher levels of the body's own thymosin beta‑4 in blood.

    Peptide
    Thymosin beta-4 (human)
    Outcome
    Not applicableCorrelation of serum thymosin beta-4 with CD4
    Study

    n = 40

    Outcome group
    Immune response · Immune and inflammation

    Source sentences

    Summary
    Both of Tβ4 and CD4 had positive correlation with vitamin A level at P < .000 and P < .003 respectively as well as with each other at p < .000.
    2 context sentences
    Summary · context
    Group 1 with vitamin A at level >200 µg/dl consists of 10 healthy subjects.
    Summary · context
    Group 2 with vitamin A deficiency at level <50 µg/dl consists of 30 subjects.

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

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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