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Travis OK, White D, Baik C, Giachelli C, Thompson W, Stubbs C, Greer M, Lemon JP, Williams JM, Cornelius DC. Interleukin-17 signaling mediates cytolytic natural killer cell activation in response to placental ischemia. Am J Physiol Regul Integr Comp Physiol 2020; 318:R1036-R1046. [PMID: 32320265 DOI: 10.1152/ajpregu.00285.2019] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
T-helper (TH)17s, IL-17, and cytolytic natural killer cells (cNKs) are increased in preeclampsia and contribute to the hypertension, inflammation, and fetal growth restriction that occurs in response to placental ischemia in the reduced uterine perfusion pressure (RUPP) rat model of preeclampsia. As IL-17 stimulates NK cytotoxicity in vitro, we tested the hypothesis that IL-17 inhibition in RUPP rats would decrease cNK activation as a mechanism to improve maternal and fetal outcomes. On gestation day (GD) 14, rats undergoing RUPP received a miniosmotic pump infusing IL-17RC (100 pg/day), a soluble IL-17 receptor (RUPP + IL-17RC). On GD19, mean arterial pressure (MAP) was measured in normal pregnant (NP), RUPP, and RUPP + IL-17RC rats (n = 10-12/group), animals were euthanized, and blood and tissues were collected for analysis. MAP was 30% higher in RUPP compared with NP (P < 0.0001) and was 12% lower in RUPP + IL-17RC (P = 0.0007 vs. RUPP). Placental cytolytic NK cells were 132% higher in RUPP than in NP (P = 0.04 vs. NP) and were normalized in RUPP + IL-17RC (P = 0.03 vs. RUPP). Placental levels of TNF-α, a cNK-secreted cytokine, and macrophage inflammatory protein-3α (MIP-3α), a cNK chemokine, were higher in RUPP vs. NP and lower after IL-17 blockade. Placental VEGF was lower in RUPP vs. NP and was normalized in RUPP + IL-17RC. In vitro cytolytic activity of RUPP placental NKs was higher compared with NP and was blunted in RUPP + IL-17RC NKs. Finally, both fetal weight and placental weight were lower in RUPP compared with NP, and were improved in RUPP + IL-17RC. These data identify IL-17 as a mediator of cNK activation in response to placental ischemia during pregnancy.
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Affiliation(s)
- Olivia K Travis
- Department of Pharmacology, University of Mississippi Medical Center, Jackson, Mississippi
| | - Dakota White
- Department of Emergency Medicine, University of Mississippi Medical Center, Jackson, Mississippi
| | - Cedar Baik
- Department of Emergency Medicine, University of Mississippi Medical Center, Jackson, Mississippi
| | - Chelsea Giachelli
- Department of Emergency Medicine, University of Mississippi Medical Center, Jackson, Mississippi
| | - Willie Thompson
- Department of Pharmacology, University of Mississippi Medical Center, Jackson, Mississippi
| | - Cassandra Stubbs
- Department of Pharmacology, University of Mississippi Medical Center, Jackson, Mississippi
| | - Mallory Greer
- Department of Pharmacology, University of Mississippi Medical Center, Jackson, Mississippi
| | - James P Lemon
- Department of Pharmacology, University of Mississippi Medical Center, Jackson, Mississippi
| | - Jan Michael Williams
- Department of Pharmacology, University of Mississippi Medical Center, Jackson, Mississippi
| | - Denise C Cornelius
- Department of Pharmacology, University of Mississippi Medical Center, Jackson, Mississippi.,Department of Emergency Medicine, University of Mississippi Medical Center, Jackson, Mississippi
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Rath G, Tripathi R. Angiogenic balance and diagnosis of pre-eclampsia: selecting the right VEGF receptor. J Hum Hypertens 2011. [DOI: 10.1038/jhh.2011.90] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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