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Study · Not a test of the peptide alone · 2001

5 results

Selective gene expression and activation-dependent regulation of vasoactive intestinal peptide receptor type 1 and type 2 in human T cells.

Lara-Marquez M, O'Dorisio M, O'Dorisio T, Shah M, Karacay B

Journal of immunology (Baltimore, Md. : 1950)1 Feb 2001Cited by 81 (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 study5

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

Studies that did not test the peptide alone5

In this study, Vasoactive intestinal peptide (VIP, aviptadil) 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 Vasoactive intestinal peptide (VIP, aviptadil).

  1. 01LabNot a test of Vasoactive intestinal peptide (VIP, aviptadil) aloneIn vitro (cells)Mechanism

    In human cells, VPAC1 was constitutively expressed in resting T cells and monocytes, with higher levels in monocytes and CD4+ T cells than in CD8+ T cells.

    In plain wordsIn lab tests on human immune cells, the VIP receptor VPAC1 was present in resting cells, most in monocytes and CD4+ T cells.

    Outcome
    Not applicableVPAC1 expression in resting T cells and monocytes
    Study

    humann: not reported in source

    Purified human CD4+ and CD8+ T cells and monocytes
    Outcome group
    Receptor activity and mechanism · Immune and inflammation

    Source sentences

    Summary
    Using the novel fluorometric-based kinetic (real-time) RT-PCR, we determined that VPAC1 is constitutively expressed in resting T cells and monocytes; the levels of expression were significantly higher in monocytes and CD4(+) T cells than in CD8(+) T cells.
    1 context sentence
    Summary · context
    Purified human peripheral blood CD4(+) T cells and CD8(+) T cells were stimulated via the TCR/CD3 receptor complex.

    In this study, Vasoactive intestinal peptide (VIP, aviptadil) 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 Vasoactive intestinal peptide (VIP, aviptadil).

  2. 02LabNot a test of Vasoactive intestinal peptide (VIP, aviptadil) aloneIn vitro (cells)Mechanism

    In resting human CD4+ and CD8+ T cells, VPAC1 mRNA expression was higher than VPAC2.

    In plain wordsIn lab tests on human T cells, resting cells made more VPAC1 receptor than VPAC2 receptor.

    Outcome
    Not applicableVPAC1 versus VPAC2 mRNA in resting T cells
    Study

    humann: not reported in source

    Purified human CD4+ and CD8+ T cells and monocytes
    Comparator
    VPAC2 mRNA
    Outcome group
    Receptor activity and mechanism · Immune and inflammation

    Source sentences

    Summary
    VPAC1 mRNA expression is significantly higher relative to VPAC2 in resting CD4(+) T cells and CD8(+) T cells.
    1 context sentence
    Summary · context
    Purified human peripheral blood CD4(+) T cells and CD8(+) T cells were stimulated via the TCR/CD3 receptor complex.

    In this study, Vasoactive intestinal peptide (VIP, aviptadil) 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 Vasoactive intestinal peptide (VIP, aviptadil).

  3. 03LabNot a test of Vasoactive intestinal peptide (VIP, aviptadil) aloneIn vitro (cells)Mechanism

    VPAC2 was expressed at very low levels in resting human T cells and was not detectable in resting monocytes.

    In plain wordsIn lab tests on human immune cells, VPAC2 receptor was very low in resting T cells and not found in monocytes.

    Outcome
    Not applicableVPAC2 expression in resting T cells and monocytes
    Study

    humann: not reported in source

    Purified human CD4+ and CD8+ T cells and monocytes
    Outcome group
    Receptor activity and mechanism · Immune and inflammation

    Source sentences

    Summary
    VPAC2 is expressed at very low levels in resting T cells but is not detectable in resting monocytes.
    1 context sentence
    Summary · context
    Purified human peripheral blood CD4(+) T cells and CD8(+) T cells were stimulated via the TCR/CD3 receptor complex.

    In this study, Vasoactive intestinal peptide (VIP, aviptadil) 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 Vasoactive intestinal peptide (VIP, aviptadil).

  4. 04LabNot a test of Vasoactive intestinal peptide (VIP, aviptadil) aloneIn vitro (cells)Mechanism

    In human Th cells, stimulation with anti-CD3 plus PMA induced activation-dependent down-regulation of VPAC1.

    In plain wordsIn lab tests on human T cells, activating the cells lowered the amount of VPAC1 receptor.

    Outcome
    DecreaseVPAC1 expression after T cell stimulation
    Study

    humann: not reported in source

    Purified human CD4+ and CD8+ T cells and monocytes
    Comparator
    Resting T cells
    Outcome group
    Receptor activity and mechanism · Immune and inflammation

    Source sentences

    Summary
    In vitro stimulation of Th cells with soluble anti-CD3 plus PMA induced a T cell activation-dependent down-regulation of VPAC1. VPAC1 is down-regulated under conditions of optimal T cell stimulation.
    1 context sentence
    Summary · context
    Purified human peripheral blood CD4(+) T cells and CD8(+) T cells were stimulated via the TCR/CD3 receptor complex.

    In this study, Vasoactive intestinal peptide (VIP, aviptadil) 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 Vasoactive intestinal peptide (VIP, aviptadil).

  5. 05LabNot a test of Vasoactive intestinal peptide (VIP, aviptadil) aloneIn vitro (cells)Mechanism

    In human CD4+ T cell subpopulations, VPAC1 down-regulation was highly correlated with T cell activation.

    In plain wordsIn lab tests on human CD4+ T cells, a fall in VPAC1 receptor was closely linked to cell activation.

    Outcome
    DecreaseVPAC1 down-regulation and T cell activation in CD4+ subpopulations
    Study

    humann: not reported in source

    Purified human CD4+ and CD8+ T cells and monocytes
    Outcome group
    Receptor activity and mechanism · Immune and inflammation

    Source sentences

    Summary
    Furthermore, down-regulation of VPAC1 in CD4(+) T cell subpopulations is highly correlated with T cell activation.
    1 context sentence
    Summary · context
    Purified human peripheral blood CD4(+) T cells and CD8(+) T cells were stimulated via the TCR/CD3 receptor complex.

    In this study, Vasoactive intestinal peptide (VIP, aviptadil) 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 Vasoactive intestinal peptide (VIP, aviptadil).

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

    12 Oct 2026, 12:58 UTC

    Study results updated

  2. Version 1

    9 Oct 2026, 12:41 UTC

    First added · source update from Europe PMC

Subjects

Terms as the source lists them.

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