Dynamics of Progesterone, TNF-α, and a Metabolite of PGF2α in Blood Plasma of Beef Cows following Embryo Transfer
Joint Authors
Cuadra, Evelin J.
Mason, Melissa
Copeland, J.
Elsasser, T. H.
Jung, Y.
Larson, J.
Source
Veterinary Medicine International
Issue
Vol. 2014, Issue 2014 (31 Dec. 2014), pp.1-8, 8 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2014-10-02
Country of Publication
Egypt
No. of Pages
8
Main Subjects
Abstract EN
Lactating beef cows previously synchronized for estrus (d 0) were assigned to four treatments to assess their effectiveness in increasing blood progesterone (P4) and its effects on tumor necrosis factor-α (TNF-α) and prostaglandin F2α (PGF2α) after the transfer of embryos.
At the time of transfer (d 7), cows received no treatment (control; n = 16 ), a controlled internal drug releasing device (CIDR; n = 16 ), human chorionic gonadotropin (hCG; n = 15 ), or gonadotropin releasing hormone (GnRH; n = 15 ).
Blood samples were taken on d 7, 14, and 21 for analysis of P4 and tumor necrosis factor-α (TNF-α).
Blood was collected (every 15 min for 2 h) in half the animals in each treatment group on d 14 and the remaining half on d 21 for analysis of prostaglandin F2α metabolite (PGFM).
Retention rates were 56.2, 62.5, 46.7, and 13.3% for cows in the control, CIDR, hCG, and GnRH groups, respectively.
Progesterone was greater ( P ≤ 0.05 ) in cows receiving hCG compared to others on d 14.
Progesterone in all treatment groups increased from d 7 to d 14 and declined ( P ≤ 0.05 ) from d 14 to d 21.
Contrary to pregnant cows, P4 and TNF-α declined from d 7 to d 21 in nonpregnant cows ( P ≤ 0.05 ).
Although PGFM increased by d 21, there was no difference between pregnant and nonpregnant cows.
American Psychological Association (APA)
Mason, Melissa& Copeland, J.& Cuadra, Evelin J.& Elsasser, T. H.& Jung, Y.& Larson, J.. 2014. Dynamics of Progesterone, TNF-α, and a Metabolite of PGF2α in Blood Plasma of Beef Cows following Embryo Transfer. Veterinary Medicine International،Vol. 2014, no. 2014, pp.1-8.
https://search.emarefa.net/detail/BIM-1051936
Modern Language Association (MLA)
Mason, Melissa…[et al.]. Dynamics of Progesterone, TNF-α, and a Metabolite of PGF2α in Blood Plasma of Beef Cows following Embryo Transfer. Veterinary Medicine International No. 2014 (2014), pp.1-8.
https://search.emarefa.net/detail/BIM-1051936
American Medical Association (AMA)
Mason, Melissa& Copeland, J.& Cuadra, Evelin J.& Elsasser, T. H.& Jung, Y.& Larson, J.. Dynamics of Progesterone, TNF-α, and a Metabolite of PGF2α in Blood Plasma of Beef Cows following Embryo Transfer. Veterinary Medicine International. 2014. Vol. 2014, no. 2014, pp.1-8.
https://search.emarefa.net/detail/BIM-1051936
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1051936