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Study · Ex vivo tissue · guinea pig · 1991

7 results

Effects of vasoactive intestinal peptide, helodermin and galanin on responses of guinea-pig lung parenchyma to histamine, acetylcholine and leukotriene D4.

Conroy DM, Samhoun MN, Piper PJ

British journal of pharmacology1 Dec 1991Cited by 3 (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

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

  1. 01LabEx vivo tissueActivity measurement

    In guinea-pig lung parenchymal strips, VIP (10 nM) potently and reversibly inhibited contractions induced by leukotriene D4.

    In plain wordsIn lab tests on guinea-pig lung tissue, VIP strongly and reversibly reduced contractions caused by leukotriene D4.

    Outcome
    DecreaseLTD4-induced contraction of lung parenchymal strips
    Study

    guinea pign: not reported in source

    Lung parenchymal strips and trachea
    Outcome group
    Inflammation markers · Respiratory
    Studied dose
    10 nMAs given in this study (guinea pig).

    Source sentences

    Summary
    VIP (10 nM) induced a potent and reversible inhibition of the contractions of GPP induced by LTD4 (1-30 pmol)
    1 context sentence
    Summary · context
    The effect of vasoactive intestinal peptide (VIP) was studied on the contractile response of guinea-pig lung parenchymal strips (GPP) induced by bronchoconstrictor agonists, such as leukotriene D4 (LTD4), histamine and acetylcholine (ACh).
  2. 02LabEx vivo tissueActivity measurement

    In guinea-pig lung parenchymal strips, VIP (10 nM) did not affect contractions induced by acetylcholine.

    In plain wordsIn lab tests on guinea-pig lung tissue, VIP did not change contractions caused by acetylcholine.

    Outcome
    No significant changeAcetylcholine-induced contraction of lung parenchymal strips
    Study

    guinea pign: not reported in source

    Lung parenchymal strips and trachea
    Outcome group
    Inflammation markers · Respiratory
    Studied dose
    10 nMAs given in this study (guinea pig).

    Source sentences

    Summary
    VIP (10 nM) induced a potent and reversible inhibition of the contractions of GPP induced by LTD4 (1-30 pmol) but did not affect those due to ACh (1-100 nmol) or histamine (1-30 nmol).
    1 context sentence
    Summary · context
    The effect of vasoactive intestinal peptide (VIP) was studied on the contractile response of guinea-pig lung parenchymal strips (GPP) induced by bronchoconstrictor agonists, such as leukotriene D4 (LTD4), histamine and acetylcholine (ACh).
  3. 03LabEx vivo tissueActivity measurement

    In guinea-pig lung parenchymal strips, VIP (10 nM) did not affect contractions induced by histamine.

    In plain wordsIn lab tests on guinea-pig lung tissue, VIP did not change contractions caused by histamine.

    Outcome
    No significant changeHistamine-induced contraction of lung parenchymal strips
    Study

    guinea pign: not reported in source

    Lung parenchymal strips and trachea
    Outcome group
    Inflammation markers · Respiratory
    Studied dose
    10 nMAs given in this study (guinea pig).

    Source sentences

    Summary
    VIP (10 nM) induced a potent and reversible inhibition of the contractions of GPP induced by LTD4 (1-30 pmol) but did not affect those due to ACh (1-100 nmol) or histamine (1-30 nmol).
    1 context sentence
    Summary · context
    The effect of vasoactive intestinal peptide (VIP) was studied on the contractile response of guinea-pig lung parenchymal strips (GPP) induced by bronchoconstrictor agonists, such as leukotriene D4 (LTD4), histamine and acetylcholine (ACh).
  4. 04LabEx vivo tissueActivity measurement

    In guinea-pig lung parenchymal strips, VIP at 100 nM did not further inhibit leukotriene D4 responses and did not reduce responses to histamine or acetylcholine.

    In plain wordsIn lab tests on guinea-pig lung tissue, ten times more VIP did not add more inhibition and did not affect histamine or acetylcholine responses.

    Outcome
    No significant changeContractions at tenfold higher VIP concentration
    Study

    guinea pign: not reported in source

    Lung parenchymal strips and trachea
    Outcome group
    Inflammation markers · Respiratory
    Studied dose
    100 nMAs given in this study (guinea pig).

    Source sentences

    Summary
    A ten fold higher concentration of VIP (100 nM) did not further inhibit LTD4-induced responses or reduce those induced by histamine or ACh.
    1 context sentence
    Summary · context
    The effect of vasoactive intestinal peptide (VIP) was studied on the contractile response of guinea-pig lung parenchymal strips (GPP) induced by bronchoconstrictor agonists, such as leukotriene D4 (LTD4), histamine and acetylcholine (ACh).
  5. 05LabEx vivo tissueActivity measurement

    In guinea-pig lung parenchymal strips, VIP (10 nM) significantly reduced the release of thromboxane A2 induced by leukotriene D4.

    In plain wordsIn lab tests on guinea-pig lung tissue, VIP lowered the release of thromboxane A2 caused by leukotriene D4.

    Outcome
    DecreaseLTD4-induced thromboxane A2 release
    Study

    guinea pign: not reported in source

    Lung parenchymal strips and trachea
    Outcome group
    Inflammation markers · Respiratory
    Studied dose
    10 nMAs given in this study (guinea pig).

    Source sentences

    Summary
    VIP (10 nM) and helodermin (10 nM) significantly reduced the LTD4-induced release of thromboxane A2 (TXA2), measured as TxB2 by radioimmunoassay, from GPP.
    1 context sentence
    Summary · context
    The effect of vasoactive intestinal peptide (VIP) was studied on the contractile response of guinea-pig lung parenchymal strips (GPP) induced by bronchoconstrictor agonists, such as leukotriene D4 (LTD4), histamine and acetylcholine (ACh).
  6. 06LabEx vivo tissueActivity measurement

    In guinea-pig lung parenchymal strips, the smaller thromboxane A2 release induced by histamine was not significantly reduced in the presence of VIP.

    In plain wordsIn lab tests on guinea-pig lung tissue, VIP did not significantly lower thromboxane A2 release caused by histamine.

    Outcome
    No significant changeHistamine-induced thromboxane A2 release
    Study

    guinea pign: not reported in source

    Lung parenchymal strips and trachea
    Outcome group
    Inflammation markers · Respiratory
    Studied dose
    Dose not stated

    Source sentences

    Summary
    The smaller release of TxA2 induced by histamine was not significantly reduced in the presence of VIP.
    1 context sentence
    Summary · context
    The effect of vasoactive intestinal peptide (VIP) was studied on the contractile response of guinea-pig lung parenchymal strips (GPP) induced by bronchoconstrictor agonists, such as leukotriene D4 (LTD4), histamine and acetylcholine (ACh).
  7. 07LabEx vivo tissueActivity measurement

    VIP at 0.1-3 nmol induced dose-related relaxations of guinea-pig trachea.

    In plain wordsIn lab tests on guinea-pig windpipe, VIP relaxed the tissue in a dose-related way.

    Outcome
    IncreaseRelaxation of guinea-pig trachea
    Study

    guinea pign: not reported in source

    Lung parenchymal strips and trachea
    Outcome group
    Receptor activity and mechanism · Respiratory
    Studied dose
    0.1-3 nmolAs given in this study (guinea pig).

    Source sentences

    Summary
    In contrast to VIP and helodermin, both at 0.1-3 nmol, which induced doserelated relaxations of guinea-pig trachea
    1 context sentence
    Summary · context
    The effect of vasoactive intestinal peptide (VIP) was studied on the contractile response of guinea-pig lung parenchymal strips (GPP) induced by bronchoconstrictor agonists, such as leukotriene D4 (LTD4), histamine and acetylcholine (ACh).

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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