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Study · Ex vivo tissue · guinea pig · 2015

9 results

In vitro skin penetration of acetyl hexapeptide-8 from a cosmetic formulation.

Kraeling ME, Zhou W, Wang P, Ogunsola OA

Cutaneous and ocular toxicology22 Apr 2014Cited by 25 (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 study9

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

  1. 01LabEx vivo tissuePharmacokinetics

    In excised guinea pig and human skin, most applied acetyl hexapeptide‑8 was washed from the surface.

    In plain wordsIn lab tests on guinea pig and human skin, most applied acetyl hexapeptide‑8 remained on the surface.

    Outcome
    Not applicablePeptide remaining on skin surface
    Study

    guinea pig and humann: not reported in source

    Hairless guinea pig and human cadaver skin
    Outcome group
    Pharmacokinetics · Pharmacology
    Studied dose
    10% at 2 mg/cm(2) · topical · 24 hAs given in this study (guinea pig and human).

    Source sentences

    Summary
    The results (percent of applied dose) showed that the majority of the Ac-EEMQRR-amide was washed from the surface of both HGP and human skin.
    3 context sentences
    Summary · context
    Therefore, the skin penetration of commercially available Ac-EEMQRR-amide from a cosmetic formulation (oil-in-water (O/W) emulsion) was determined in hairless guinea pig (HGP) and human cadaver skin assembled into in vitro diffusion cells.
    Summary · context
    An O/W emulsion containing 10% Ac-EEMQRR-amide was applied to skin at a dose of 2 mg/cm(2).
    Summary · context
    After a 24-h exposure, the skin surface was washed to remove unabsorbed peptide.
  2. 02LabEx vivo tissuePharmacokinetics

    In excised guinea pig skin, the penetrated acetyl hexapeptide‑8 remained mostly in the stratum corneum, containing 0.54% of applied dose.

    In plain wordsIn lab tests on guinea pig skin, the peptide that penetrated the skin remained mostly in the outer skin layer.

    Outcome
    Not applicableStratum corneum retention
    Study

    guinea pign: not reported in source

    Hairless guinea pig skin
    Outcome group
    Pharmacokinetics · Pharmacology
    Studied dose
    10% at 2 mg/cm(2) · topical · 24 hAs given in this study (guinea pig).

    Measurements

    Stratum corneum peptide
    0.54 % of applied dose
    HGP

    Source sentences

    Summary
    Ac-EEMQRR-amide that penetrated skin remained mostly in the stratum corneum of HGP (0.54%) and human (0.22%) with the peptide levels decreasing as each layer was removed by tape stripping.
    4 context sentences
    Summary · context
    The results (percent of applied dose) showed that the majority of the Ac-EEMQRR-amide was washed from the surface of both HGP and human skin.
    Summary · context
    Therefore, the skin penetration of commercially available Ac-EEMQRR-amide from a cosmetic formulation (oil-in-water (O/W) emulsion) was determined in hairless guinea pig (HGP) and human cadaver skin assembled into in vitro diffusion cells.
    Summary · context
    An O/W emulsion containing 10% Ac-EEMQRR-amide was applied to skin at a dose of 2 mg/cm(2).
    Summary · context
    After a 24-h exposure, the skin surface was washed to remove unabsorbed peptide.
  3. 03LabEx vivo tissuePharmacokinetics

    In human cadaver skin, the penetrated acetyl hexapeptide‑8 remained mostly in the stratum corneum, containing 0.22% of applied dose.

    In plain wordsIn lab tests on human skin, the peptide that penetrated the skin remained mostly in the outer skin layer.

    Outcome
    Not applicableStratum corneum retention
    Study

    humann: not reported in source

    Human cadaver skin
    Outcome group
    Pharmacokinetics · Pharmacology
    Studied dose
    10% at 2 mg/cm(2) · topical · 24 hAs given in this study (human).

    Measurements

    Stratum corneum peptide
    0.22 % of applied dose
    human

    Source sentences

    Summary
    Ac-EEMQRR-amide that penetrated skin remained mostly in the stratum corneum of HGP (0.54%) and human (0.22%) with the peptide levels decreasing as each layer was removed by tape stripping.
    4 context sentences
    Summary · context
    The results (percent of applied dose) showed that the majority of the Ac-EEMQRR-amide was washed from the surface of both HGP and human skin.
    Summary · context
    Therefore, the skin penetration of commercially available Ac-EEMQRR-amide from a cosmetic formulation (oil-in-water (O/W) emulsion) was determined in hairless guinea pig (HGP) and human cadaver skin assembled into in vitro diffusion cells.
    Summary · context
    An O/W emulsion containing 10% Ac-EEMQRR-amide was applied to skin at a dose of 2 mg/cm(2).
    Summary · context
    After a 24-h exposure, the skin surface was washed to remove unabsorbed peptide.
  4. 04LabEx vivo tissuePharmacokinetics

    In excised guinea pig and human skin, acetyl hexapeptide‑8 levels decreased with successive stratum corneum tape stripping.

    In plain wordsIn lab tests on guinea pig and human skin, acetyl hexapeptide‑8 levels decreased with successive outer skin layers.

    Outcome
    DecreasePeptide levels across stratum corneum layers
    Study

    guinea pig and humann: not reported in source

    Hairless guinea pig and human cadaver skin
    Outcome group
    Pharmacokinetics · Pharmacology
    Studied dose
    10% at 2 mg/cm(2) · topical · 24 hAs given in this study (guinea pig and human).

    Source sentences

    Summary
    Ac-EEMQRR-amide that penetrated skin remained mostly in the stratum corneum of HGP (0.54%) and human (0.22%) with the peptide levels decreasing as each layer was removed by tape stripping.
    3 context sentences
    Summary · context
    Therefore, the skin penetration of commercially available Ac-EEMQRR-amide from a cosmetic formulation (oil-in-water (O/W) emulsion) was determined in hairless guinea pig (HGP) and human cadaver skin assembled into in vitro diffusion cells.
    Summary · context
    An O/W emulsion containing 10% Ac-EEMQRR-amide was applied to skin at a dose of 2 mg/cm(2).
    Summary · context
    After a 24-h exposure, the skin surface was washed to remove unabsorbed peptide.
  5. 05LabEx vivo tissuePharmacokinetics

    In excised guinea pig skin, epidermal acetyl hexapeptide‑8 recovery was 0.01% of applied dose, similar to human skin.

    In plain wordsIn lab tests, guinea pig epidermal acetyl hexapeptide‑8 recovery was 0.01% of applied dose, similar to human skin.

    Outcome
    Not applicableEpidermal peptide recovery
    Study

    guinea pign: not reported in source

    Hairless guinea pig skin
    Comparator
    Human cadaver skin
    Outcome group
    Pharmacokinetics · Pharmacology
    Studied dose
    10% at 2 mg/cm(2) · topical · 24 hAs given in this study (guinea pig).

    Measurements

    Epidermal peptide
    0.01 % of applied dose
    HGP

    Source sentences

    Summary
    Total Ac-EEMQRR-amide found in the epidermis of HGP and human skin was similar at 0.01%.
    4 context sentences
    Summary · context
    The results (percent of applied dose) showed that the majority of the Ac-EEMQRR-amide was washed from the surface of both HGP and human skin.
    Summary · context
    Therefore, the skin penetration of commercially available Ac-EEMQRR-amide from a cosmetic formulation (oil-in-water (O/W) emulsion) was determined in hairless guinea pig (HGP) and human cadaver skin assembled into in vitro diffusion cells.
    Summary · context
    An O/W emulsion containing 10% Ac-EEMQRR-amide was applied to skin at a dose of 2 mg/cm(2).
    Summary · context
    After a 24-h exposure, the skin surface was washed to remove unabsorbed peptide.
  6. 06LabEx vivo tissuePharmacokinetics

    In human cadaver skin, epidermal acetyl hexapeptide‑8 recovery was 0.01% of applied dose, similar to guinea pig skin.

    In plain wordsIn lab tests, human epidermal acetyl hexapeptide‑8 recovery was 0.01% of applied dose, similar to guinea pig skin.

    Outcome
    Not applicableEpidermal peptide recovery
    Study

    humann: not reported in source

    Human cadaver skin
    Comparator
    Hairless guinea pig skin
    Outcome group
    Pharmacokinetics · Pharmacology
    Studied dose
    10% at 2 mg/cm(2) · topical · 24 hAs given in this study (human).

    Measurements

    Epidermal peptide
    0.01 % of applied dose
    human

    Source sentences

    Summary
    Total Ac-EEMQRR-amide found in the epidermis of HGP and human skin was similar at 0.01%.
    4 context sentences
    Summary · context
    The results (percent of applied dose) showed that the majority of the Ac-EEMQRR-amide was washed from the surface of both HGP and human skin.
    Summary · context
    Therefore, the skin penetration of commercially available Ac-EEMQRR-amide from a cosmetic formulation (oil-in-water (O/W) emulsion) was determined in hairless guinea pig (HGP) and human cadaver skin assembled into in vitro diffusion cells.
    Summary · context
    An O/W emulsion containing 10% Ac-EEMQRR-amide was applied to skin at a dose of 2 mg/cm(2).
    Summary · context
    After a 24-h exposure, the skin surface was washed to remove unabsorbed peptide.
  7. 07LabEx vivo tissuePharmacokinetics

    No acetyl hexapeptide‑8 was detected in the dermis of excised human or guinea pig skin.

    In plain wordsIn lab tests, no acetyl hexapeptide‑8 was detected in the dermis of human or guinea pig skin.

    Outcome
    Not applicableDermal peptide detection
    Study

    guinea pig and humann: not reported in source

    Hairless guinea pig and human cadaver skin
    Outcome group
    Pharmacokinetics · Pharmacology
    Studied dose
    10% at 2 mg/cm(2) · topical · 24 hAs given in this study (guinea pig and human).

    Source sentences

    Summary
    No peptide was detected in the dermis or buffer collected underneath the skin for both human and HGP.
    3 context sentences
    Summary · context
    Therefore, the skin penetration of commercially available Ac-EEMQRR-amide from a cosmetic formulation (oil-in-water (O/W) emulsion) was determined in hairless guinea pig (HGP) and human cadaver skin assembled into in vitro diffusion cells.
    Summary · context
    An O/W emulsion containing 10% Ac-EEMQRR-amide was applied to skin at a dose of 2 mg/cm(2).
    Summary · context
    After a 24-h exposure, the skin surface was washed to remove unabsorbed peptide.
  8. 08LabEx vivo tissuePharmacokinetics

    No acetyl hexapeptide‑8 was detected in buffer beneath excised human or guinea pig skin.

    In plain wordsIn lab tests, no acetyl hexapeptide‑8 was detected in buffer beneath human or guinea pig skin.

    Outcome
    Not applicablePeptide detection in receptor buffer
    Study

    guinea pig and humann: not reported in source

    Hairless guinea pig and human cadaver skin
    Outcome group
    Pharmacokinetics · Pharmacology
    Studied dose
    10% at 2 mg/cm(2) · topical · 24 hAs given in this study (guinea pig and human).

    Source sentences

    Summary
    No peptide was detected in the dermis or buffer collected underneath the skin for both human and HGP.
    3 context sentences
    Summary · context
    Therefore, the skin penetration of commercially available Ac-EEMQRR-amide from a cosmetic formulation (oil-in-water (O/W) emulsion) was determined in hairless guinea pig (HGP) and human cadaver skin assembled into in vitro diffusion cells.
    Summary · context
    An O/W emulsion containing 10% Ac-EEMQRR-amide was applied to skin at a dose of 2 mg/cm(2).
    Summary · context
    After a 24-h exposure, the skin surface was washed to remove unabsorbed peptide.
  9. 09LabEx vivo tissuePharmacokinetics

    No hexapeptide metabolite was detected in guinea pig or human skin layers or buffer after acetyl hexapeptide‑8 exposure.

    In plain wordsIn lab tests, no hexapeptide metabolite was detected in guinea pig or human skin layers or buffer.

    Outcome
    Not applicableHexapeptide metabolite detection
    Study

    guinea pig and humann: not reported in source

    Hairless guinea pig and human cadaver skin
    Outcome group
    Pharmacokinetics · Pharmacology
    Studied dose
    10% at 2 mg/cm(2) · topical · 24 hAs given in this study (guinea pig and human).

    Source sentences

    Summary
    There was no hexapeptide metabolite (H2N-EEMQRR-amide) detected in any layers of HGP skin, human skin or buffer collected underneath the skin.
    3 context sentences
    Summary · context
    Therefore, the skin penetration of commercially available Ac-EEMQRR-amide from a cosmetic formulation (oil-in-water (O/W) emulsion) was determined in hairless guinea pig (HGP) and human cadaver skin assembled into in vitro diffusion cells.
    Summary · context
    An O/W emulsion containing 10% Ac-EEMQRR-amide was applied to skin at a dose of 2 mg/cm(2).
    Summary · context
    After a 24-h exposure, the skin surface was washed to remove unabsorbed peptide.

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

    22 Oct 2026, 02:25 UTC

    Study results updated

  2. Version 1

    21 Oct 2026, 18:59 UTC

    First added · source update from Europe PMC

Subjects

Terms as the source lists them.

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