TY - JOUR
T1 - Involvement of Pro-Inflammatory Cytokines, Mediators of Inflammation, and Basic Fibroblast Growth Factor in Prostaglandin F2α-Induced Luteolysis in Bovine Corpus Luteum
AU - Neuvians, T. P.
AU - Schams, D.
AU - Berisha, B.
AU - Pfaffl, M. W.
PY - 2004/2
Y1 - 2004/2
N2 - The process of luteolysis requires very subtly modulated coordination of different factors and regulation systems. Immune cells and cytokines were shown to be relevant for bovine luteolysis. The aim of this study was to investigate the detailed pattern of mRNA expression of the pro-inflammatory cytokines tumor necrosis factor α (TNRα), TNF receptor type 1 (TNF-R1), interleukin 1β (IL-1β), and interferon γ (IFNγ), and of the inducible nitric oxide synthase (iNOS) and the basic fibroblast growth factor (FGF-2) during prostaglandin (PG) F2α-induced luteolysis in the bovine corpus luteum (CL). In addition, the mRNA expression for the LH-receptor (LH-R) and the steroidogenic enzyme P450scc was determined. Cows in the midluteal phase (Days 8-12) were injected with the PGF2α analogue cloprostenol, and CL were collected by transvaginal ovariectomy before and 2, 4, 12, 48, and 64 h after PGF2α injection. Conventional and real-time reverse transcription polymerase chain reaction RT-PCR (LightCycler) using SYBR Green I detection were employed to determine the mRNA expression for the investigated factors. All cytokines were significantly up-regulated during induced luteolysis. LH-R and P450scc mRNA were down-regulated (P < 0.05) during structural luteolysis (after 12 h), and P450scc in addition at 2 h after PGF2α (P < 0.05). FGF-2 expression increased (P < 0.001) during functional luteolysis (until 12 h after PGF2α) and diminished thereafter. The mRNA expression for iNOS decreased (P < 0.05) after induction of luteolysis. In conclusion, cytokines may be involved not only in structural but also in functional luteolysis and the deprivation of luteal survival factors, leading to a situation where apoptosis can occur. FGF-2 may participate in the suppression of cytokine-induced iNOS mRNA expression and in the prevention of an inflammatory reaction in the surrounding tissues.
AB - The process of luteolysis requires very subtly modulated coordination of different factors and regulation systems. Immune cells and cytokines were shown to be relevant for bovine luteolysis. The aim of this study was to investigate the detailed pattern of mRNA expression of the pro-inflammatory cytokines tumor necrosis factor α (TNRα), TNF receptor type 1 (TNF-R1), interleukin 1β (IL-1β), and interferon γ (IFNγ), and of the inducible nitric oxide synthase (iNOS) and the basic fibroblast growth factor (FGF-2) during prostaglandin (PG) F2α-induced luteolysis in the bovine corpus luteum (CL). In addition, the mRNA expression for the LH-receptor (LH-R) and the steroidogenic enzyme P450scc was determined. Cows in the midluteal phase (Days 8-12) were injected with the PGF2α analogue cloprostenol, and CL were collected by transvaginal ovariectomy before and 2, 4, 12, 48, and 64 h after PGF2α injection. Conventional and real-time reverse transcription polymerase chain reaction RT-PCR (LightCycler) using SYBR Green I detection were employed to determine the mRNA expression for the investigated factors. All cytokines were significantly up-regulated during induced luteolysis. LH-R and P450scc mRNA were down-regulated (P < 0.05) during structural luteolysis (after 12 h), and P450scc in addition at 2 h after PGF2α (P < 0.05). FGF-2 expression increased (P < 0.001) during functional luteolysis (until 12 h after PGF2α) and diminished thereafter. The mRNA expression for iNOS decreased (P < 0.05) after induction of luteolysis. In conclusion, cytokines may be involved not only in structural but also in functional luteolysis and the deprivation of luteal survival factors, leading to a situation where apoptosis can occur. FGF-2 may participate in the suppression of cytokine-induced iNOS mRNA expression and in the prevention of an inflammatory reaction in the surrounding tissues.
KW - Corpus luteum
KW - Corpus luteum function
KW - Cytokines
KW - Nitric oxide
UR - http://www.scopus.com/inward/record.url?scp=0742271475&partnerID=8YFLogxK
U2 - 10.1095/biolreprod.103.016154
DO - 10.1095/biolreprod.103.016154
M3 - Article
C2 - 14561657
AN - SCOPUS:0742271475
SN - 0006-3363
VL - 70
SP - 473
EP - 480
JO - Biology of Reproduction
JF - Biology of Reproduction
IS - 2
ER -