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Low blood ISG15 mRNA and progesterone levels are predictive of non-pregnant dairy cows.

Low blood ISG15 mRNA and progesterone levels are predictive of non-pregnant dairy cows. Research Abstract Details 

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  • Low blood ISG15 mRNA and progesterone levels are predictive of non-pregnant dairy cows. Abstract Text:

    hyungchul hanHyungchul Han,kathleen j austinKathleen J Austin,lea a rempelLea A Rempel,thomas r hansenThomas R Hansen,

    ISG15 is induced by conceptus-derived interferon-tau in the endometrium on days 15-45 of pregnancy. It was hypothesized that pregnancy induces blood cell ISG15 gene expression and that low blood ISG15 mRNA levels provide an indication of non-pregnant cows on day 18. Blood was collected either on day 18 (n = 78) or on days 15-21, 25, and 32 (n = 21; serial collection) from dairy cows following artificial insemination (AI). Plasma progesterone concentration was determined using RIA. ISG15 mRNA levels were determined using real-time PCR. Pregnancy was diagnosed on day 32 using transrectal ultrasound. ISG15 mRNA levels increased after day 16, peaked at day 20 and then declined to day 16 levels by 32 days following AI. The average pregnancy rate was 43% based on blood cell ISG15 mRNA. The average pregnancy rate was 33% based on the transrectal ultrasound. Lower levels of ISG15 mRNA or progesterone during serial collections were 100% accurate in predicting non-pregnant cows based on day 32 transrectal ultrasound. However, detection of ISG15 mRNA yielded 78% accuracy in predicting pregnant cows, while progesterone yielded 58% accuracy. Average plasma progesterone based on pregnancy status according to ultrasound was consistently higher in pregnant (> 4 ng/ml) when compared with non-pregnant cows from days 15 to 32, except on day 16. It is concluded that detection of low blood ISG15 mRNA levels during serial collection from days 17 to 25 serves as an accurate indicator of cows that are not pregnant, thus allowing re-synchronization and insemination.

    Low blood ISG15 mRNA and progesterone levels are predictive of non-pregnant dairy cows. Publishing Authors By Initials

    h hanH Han,kj austinKJ Austin,la rempelLA Rempel,tr hansenTR Hansen,

    For similar proteins: ubiquitins research abstracts see: proteins: ubiquitins research

    PUBMED ID PMID:

    MEDLINE DATE:

    Low blood ISG15 mRNA and progesterone levels are predictive of non-pregnant dairy cows. Journal Published:

    PUBLICATION TYPE: Research Support, U.S. Gov't,

    Journal: The Journal of endocrinology

    VOLUME: 191

    Page Numbers: 505-12

    Journal Abbreviation: J. Endocrinol.

    ISSN: 0022-0795

    DAY: 3

    MONTH: Nov

    YEAR: 2006

    Low blood ISG15 mRNA and progesterone levels are predictive of non-pregnant dairy cows. Information

    Number of References:

    LANGUAGE: eng

    NlmUniqueID: 375363

    Low blood ISG15 mRNA and progesterone levels are predictive of non-pregnant dairy cows. Keywords Mesh Terms:

    KEYWORDS: Ubiquitins

    MESH TERMS: blood

    Chemical & Substance for Abstract: Low blood ISG15 mRNA and progesterone levels are predictive of non-pregnant dairy cows. Information

    Substance Name: Progesterone

    Registry Number: 57-83-0

    Grant and Affiliation Information for Low blood ISG15 mRNA and progesterone levels are predictive of non-pregnant dairy cows.

    AFFILIATION: Department of Animal Science, University of Wyoming, Laramie, Wyoming 82071, USA.

    Country: England

    England Research Publication

    AGENCY: United States NICHD

    GRANT: HD 32475

    ACRONYM: HD

    MEDLINETA: J Endocrinol

    REFSOURCE:

    DATABASENAME:

    ACCESSION NUMBER:

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