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Dynamics of Progesterone, TNF- α , and a Metabolite of PGF2 α in Blood Plasma of Beef Cows following Embryo Transfer.

Mason MC, Copeland J, Cuadra EJ, Elsasser TH, Jung Y, Larson J - Vet Med Int (2014)

Bottom Line: 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).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.

View Article: PubMed Central - PubMed

Affiliation: Department of Agriculture, Alcorn State University, 1000 ASU Drive No. 750, Alcorn State, Lorman, MS 39096, USA.

ABSTRACT
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.

No MeSH data available.


Related in: MedlinePlus

Concentrations (Mean ± SEM) of TNF-α among treatment groups on d 7, d 14, and d 21. Treatment x day interaction (P ≤ 0.05); CIDR = controlled internal drug release; GnRH = gonadotropin releasing hormone; hCG = human chorionic gonadotropin.
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fig3: Concentrations (Mean ± SEM) of TNF-α among treatment groups on d 7, d 14, and d 21. Treatment x day interaction (P ≤ 0.05); CIDR = controlled internal drug release; GnRH = gonadotropin releasing hormone; hCG = human chorionic gonadotropin.

Mentions: Concentrations of TNF-α declined (P ≤ 0.05) in animals in the hCG group from d 7 to d 21 (Figure 3). This same figure also shows a greater (P ≤ 0.05) concentration of TNF-α in the hCG group compared to the GnRH group on d 7. The decrease (P ≤ 0.05) in TNF-α between d 14 and d 21 also follows the decrease (P ≤ 0.05) in concentrations of P4 within the hCG group.


Dynamics of Progesterone, TNF- α , and a Metabolite of PGF2 α in Blood Plasma of Beef Cows following Embryo Transfer.

Mason MC, Copeland J, Cuadra EJ, Elsasser TH, Jung Y, Larson J - Vet Med Int (2014)

Concentrations (Mean ± SEM) of TNF-α among treatment groups on d 7, d 14, and d 21. Treatment x day interaction (P ≤ 0.05); CIDR = controlled internal drug release; GnRH = gonadotropin releasing hormone; hCG = human chorionic gonadotropin.
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC4202664&req=5

fig3: Concentrations (Mean ± SEM) of TNF-α among treatment groups on d 7, d 14, and d 21. Treatment x day interaction (P ≤ 0.05); CIDR = controlled internal drug release; GnRH = gonadotropin releasing hormone; hCG = human chorionic gonadotropin.
Mentions: Concentrations of TNF-α declined (P ≤ 0.05) in animals in the hCG group from d 7 to d 21 (Figure 3). This same figure also shows a greater (P ≤ 0.05) concentration of TNF-α in the hCG group compared to the GnRH group on d 7. The decrease (P ≤ 0.05) in TNF-α between d 14 and d 21 also follows the decrease (P ≤ 0.05) in concentrations of P4 within the hCG group.

Bottom Line: 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).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.

View Article: PubMed Central - PubMed

Affiliation: Department of Agriculture, Alcorn State University, 1000 ASU Drive No. 750, Alcorn State, Lorman, MS 39096, USA.

ABSTRACT
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.

No MeSH data available.


Related in: MedlinePlus