| # |
PMID |
Sentence |
| 1 |
20562522
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Cell death of LSCs and LECs is essential for structural luteolysis.
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| 2 |
20562522
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We previously reported that a treatment combining tumor necrosis factor α (TNF) and interferon γ (IFNG) induced cell death in LSCs and that LECs express TNF receptor type I (TNFRI).
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| 3 |
20562522
|
To induce cell death in LECs, LECs were treated with TNF or IFNG (0, 0.05, 0.5, 1.0, 2.5 nM) and a combination of TNF (0.5 nM) and IFNG (0.5 nM) for 24 h.
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| 4 |
20562522
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The viability of LECs was reduced by a single treatment with TNF or IFNG dose-dependently (P<0.05).
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| 5 |
20562522
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Cell viability was further decreased by treatment with a combination of TNF and IFNG (P<0.05).
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| 6 |
20562522
|
Cells with DNA fragmentation (TUNEL-positive cells) were observed after the treatment with TNF and IFNG.
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| 7 |
20562522
|
Semi-quantitative RT-PCR analysis revealed that treatment with IFNG alone or in combination with TNF increased the expression of TNFRI mRNA compared with the control (P<0.05).
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| 8 |
20562522
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In summary, TNF and IFNG increased cell death in cultured bovine LECs.
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| 9 |
20562522
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The upregulation of TNFRI mRNA expression by IFNG suggests that TNF and IFNG synergistically affect the death of LECs resulting in acute luteolysis.
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| 10 |
22847916
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The purpose of the present study was to elucidate if tumor necrosis factor-α (TNF), interferon γ (IFNG), and/or progesterone (P4) play roles in regulating NO generating system in LECs.
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| 11 |
22847916
|
Cultured bovine LECs obtained from the CL at the mid-luteal stage (Days 8-12 of the cycle) were treated for 24 hr with TNF (2.9 nM), IFNG (2.5 nM), or P4 (0.032-32 µM).
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| 12 |
22847916
|
NO production was increased by TNF and IFNG, but decreased by P4 (P < 0.05).
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| 13 |
22847916
|
TNF and IFNG stimulated the relative steady-state amounts of inducible nitric oxide synthase (iNOS) mRNA and iNOS protein expression (P < 0.05), whereas P4 inhibited relative steady-state amounts of iNOS mRNA and iNOS protein expression (P < 0.05).
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| 14 |
22847916
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TNF and IFNG stimulated NOS activity (P < 0.05) and 1400W, a specific inhibitor of iNOS, reduced NO production stimulated by TNF and IFNG in LECs (P < 0.05).
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| 15 |
22847916
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The overall findings suggest that TNF and IFNG accelerate luteolysis by increasing NO production via stimulation of iNOS expression and NOS activity in bovine LECs.
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| 16 |
22847916
|
P4, on the other hand, may act in maintaining CL function by suppressing iNOS expression in bovine LECs.
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