Intrapulse changes in progesterone and LH concentrations and luteal blood flow during an estradiol-induced pulse of a metabolite of prostaglandin F2α in heifers
Physiologic doses (0.1 mg followed by 0.05 mg 1 h later) of estradiol-17β in sesame-oil vehicle or vehicle alone ( n = 6/group) were given to heifers on day 14 after ovulation (preluteolysis) to study the effect of estradiol (E2) on circulating 13,14-dihydro-15-keto-PGF2α (PGFM) and on PGFM pulses....
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| Published in: | Animal reproduction science Vol. 121; no. 1; pp. 34 - 38 |
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| Main Authors: | , , , |
| Format: | Journal Article |
| Language: | English |
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01-08-2010
[Amsterdam]: Elsevier Science |
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| Abstract | Physiologic doses (0.1
mg followed by 0.05
mg 1
h later) of estradiol-17β in sesame-oil vehicle or vehicle alone (
n
=
6/group) were given to heifers on day 14 after ovulation (preluteolysis) to study the effect of estradiol (E2) on circulating 13,14-dihydro-15-keto-PGF2α (PGFM) and on PGFM pulses. Blood samples were collected hourly for 10
h after the 0.1-mg treatment. The E2 group had an increase (
P
<
0.03) in PGFM concentration by 4
h and greater (
P
<
0.0001) prominence of the PGFM pulses. Changes in progesterone and LH concentrations and luteal blood flow within a PGFM pulse were characterized. Within a PGFM pulse in the E2 group, progesterone decreased (
P
<
0.04) between Hours −2 and 0 (ascending portion; Hour 0
=
peak of pulse) and increased (
P
<
0.04) between Hours 0 and 2 (descending portion). Intrapulse changes in progesterone were not detected in the vehicle group. Concentration of LH in the E2 group increased (
P
<
0.05) between Hours −1 and 1 and in the vehicle group decreased (
P
<
0.03) between Hours −1 and 0 and increased (
P
<
0.06) between Hours 0 and 1. The percentage of luteal area with blood-flow signals increased (
P
<
0.02) between Hours 0 and 1 in the E2 group, and there were no other differences between hours in either group. Results were consistent with reports of changes in progesterone concentration within a PGFM pulse in cattle and demonstrated intrapulse changes in LH concentration and luteal blood flow during an E2-induced PGFM pulse. |
|---|---|
| AbstractList | Physiologic doses (0.1
mg followed by 0.05
mg 1
h later) of estradiol-17β in sesame-oil vehicle or vehicle alone (
n
=
6/group) were given to heifers on day 14 after ovulation (preluteolysis) to study the effect of estradiol (E2) on circulating 13,14-dihydro-15-keto-PGF2α (PGFM) and on PGFM pulses. Blood samples were collected hourly for 10
h after the 0.1-mg treatment. The E2 group had an increase (
P
<
0.03) in PGFM concentration by 4
h and greater (
P
<
0.0001) prominence of the PGFM pulses. Changes in progesterone and LH concentrations and luteal blood flow within a PGFM pulse were characterized. Within a PGFM pulse in the E2 group, progesterone decreased (
P
<
0.04) between Hours −2 and 0 (ascending portion; Hour 0
=
peak of pulse) and increased (
P
<
0.04) between Hours 0 and 2 (descending portion). Intrapulse changes in progesterone were not detected in the vehicle group. Concentration of LH in the E2 group increased (
P
<
0.05) between Hours −1 and 1 and in the vehicle group decreased (
P
<
0.03) between Hours −1 and 0 and increased (
P
<
0.06) between Hours 0 and 1. The percentage of luteal area with blood-flow signals increased (
P
<
0.02) between Hours 0 and 1 in the E2 group, and there were no other differences between hours in either group. Results were consistent with reports of changes in progesterone concentration within a PGFM pulse in cattle and demonstrated intrapulse changes in LH concentration and luteal blood flow during an E2-induced PGFM pulse. Physiologic doses (0.1mg followed by 0.05mg 1h later) of estradiol-17β in sesame-oil vehicle or vehicle alone (n =6/group) were given to heifers on day 14 after ovulation (preluteolysis) to study the effect of estradiol (E2) on circulating 13,14-dihydro-15-keto-PGF2α (PGFM) and on PGFM pulses. Blood samples were collected hourly for 10h after the 0.1-mg treatment. The E2 group had an increase (P <0.03) in PGFM concentration by 4h and greater (P <0.0001) prominence of the PGFM pulses. Changes in progesterone and LH concentrations and luteal blood flow within a PGFM pulse were characterized. Within a PGFM pulse in the E2 group, progesterone decreased (P <0.04) between Hours −2 and 0 (ascending portion; Hour 0=peak of pulse) and increased (P <0.04) between Hours 0 and 2 (descending portion). Intrapulse changes in progesterone were not detected in the vehicle group. Concentration of LH in the E2 group increased (P <0.05) between Hours −1 and 1 and in the vehicle group decreased (P <0.03) between Hours −1 and 0 and increased (P <0.06) between Hours 0 and 1. The percentage of luteal area with blood-flow signals increased (P <0.02) between Hours 0 and 1 in the E2 group, and there were no other differences between hours in either group. Results were consistent with reports of changes in progesterone concentration within a PGFM pulse in cattle and demonstrated intrapulse changes in LH concentration and luteal blood flow during an E2-induced PGFM pulse. |
| Author | Imam, S. Ginther, O.J. Shrestha, H.K. Beg, M.A. |
| Author_xml | – sequence: 1 givenname: S. surname: Imam fullname: Imam, S. organization: Eutheria Foundation, Cross Plains, WI 53528, USA – sequence: 2 givenname: H.K. surname: Shrestha fullname: Shrestha, H.K. organization: Eutheria Foundation, Cross Plains, WI 53528, USA – sequence: 3 givenname: M.A. surname: Beg fullname: Beg, M.A. organization: Pathobiological Sciences, University of Wisconsin, Madison, WI 53706, USA – sequence: 4 givenname: O.J. surname: Ginther fullname: Ginther, O.J. email: ginther@vetmed.wisc.edu organization: Eutheria Foundation, Cross Plains, WI 53528, USA |
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| CitedBy_id | crossref_primary_10_1016_j_theriogenology_2013_02_003 crossref_primary_10_1016_j_theriogenology_2011_11_014 crossref_primary_10_1016_j_theriogenology_2011_03_017 crossref_primary_10_1016_j_anireprosci_2012_06_014 crossref_primary_10_1016_j_domaniend_2010_09_002 crossref_primary_10_1095_biolreprod_110_089953 crossref_primary_10_1016_j_domaniend_2010_09_006 crossref_primary_10_1016_j_domaniend_2011_05_003 crossref_primary_10_1016_j_theriogenology_2012_08_003 crossref_primary_10_1016_j_theriogenology_2011_08_020 crossref_primary_10_1016_j_anireprosci_2010_08_019 crossref_primary_10_1016_j_domaniend_2011_06_003 crossref_primary_10_1095_biolreprod_112_099820 crossref_primary_10_1016_j_repbio_2021_100570 crossref_primary_10_1095_biolreprod_111_094870 |
| Cites_doi | 10.1016/j.theriogenology.2010.02.021 10.1530/REP-09-0504 10.1095/biolreprod63.2.383 10.1095/biolreprod.106.057653 10.2527/jas1986.621191x 10.1016/0090-6980(86)90178-4 10.1095/biolreprod.108.072769 10.1152/physrev.1999.79.2.263 10.1016/0093-691X(85)90041-X 10.1016/0090-6980(76)90194-5 10.2460/ajvr.70.1.141 10.1095/biolreprod.108.073825 10.1530/REP-09-0091 10.1071/R97059 10.1095/biolreprod45.5.655 10.1530/jrf.0.1150015 10.1016/j.anireprosci.2009.06.021 10.1095/biolreprod.109.081976 |
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| Snippet | Physiologic doses (0.1
mg followed by 0.05
mg 1
h later) of estradiol-17β in sesame-oil vehicle or vehicle alone (
n
=
6/group) were given to heifers on day 14... Physiologic doses (0.1mg followed by 0.05mg 1h later) of estradiol-17β in sesame-oil vehicle or vehicle alone (n =6/group) were given to heifers on day 14... |
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| SubjectTerms | blood flow Cattle corpus luteum dosage dose response Estradiol heifers hormonal regulation hormone secretion luteinizing hormone luteolysis normal values ovaries ovulation Progesterone Prostaglandin F2α prostaglandins reference standards temporal variation |
| Title | Intrapulse changes in progesterone and LH concentrations and luteal blood flow during an estradiol-induced pulse of a metabolite of prostaglandin F2α in heifers |
| URI | https://dx.doi.org/10.1016/j.anireprosci.2010.05.009 |
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