Interleukin-4 supplementation improves the pathophysiology of hypertension in response to placental ischemia in RUPP rats
| Autor: | Denise C. Cornelius, Ashlyn C Harmon, Venkata Ramana Vaka, Mark W. Cunningham, Florian Herse, Lorena M. Amaral, Gerd Wallukat, Jesse N. Cottrell, Babbette LaMarca, Ralf Dechend, Tarek Ibrahim |
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| Rok vydání: | 2019 |
| Předmět: |
0301 basic medicine
medicine.medical_specialty Physiology Placenta Ischemia Blood Pressure Inflammation 030204 cardiovascular system & hematology Receptor Angiotensin Type 1 Preeclampsia Rats Sprague-Dawley 03 medical and health sciences 0302 clinical medicine Pregnancy Physiology (medical) medicine.artery Internal medicine Renin–angiotensin system medicine Animals Uterine artery Interleukin 4 business.industry Uterus Autoantibody medicine.disease Disease Models Animal Uterine Artery 030104 developmental biology Endocrinology Pathophysiology of hypertension Hypertension Female Interleukin-4 medicine.symptom business Research Article |
| Zdroj: | American Journal of Physiology-Regulatory, Integrative and Comparative Physiology. 316:R165-R171 |
| ISSN: | 1522-1490 0363-6119 |
| DOI: | 10.1152/ajpregu.00167.2018 |
| Popis: | Preeclampsia (PE) is characterized by chronic inflammation and elevated agonistic autoantibodies to the angiotensin type 1 receptor (AT1-AA), endothelin-1, and uterine artery resistance index (UARI) during pregnancy. Previous studies report an imbalance among immune cells, with T-helper type 2 (Th2) cells being decreased during PE. We hypothesized that interleukin-4 (IL-4) would increase Th2 cells and improve the pathophysiology in response to placental ischemia during pregnancy. IL-4 (600 ng/day) was administered via osmotic minipump on gestational day 14 to normal pregnant (NP) and reduced uterine perfusion pressure (RUPP) rats. Carotid catheters were inserted, and Doppler ultrasound was performed on gestational day 18. Blood pressure (mean arterial pressure), TNF-α, IL-6, AT1-AA, natural killer cells, Th2 cells, and B cells were measured on gestational day 19. Mean arterial pressure was 97 ± 2 mmHg in NP ( n = 9), 101 ± 3 mmHg in IL-4-treated NP ( n = 14), and 137 ± 4 mmHg in RUPP ( n = 8) rats and improved to 108 ± 3 mmHg in IL-4-treated RUPP rats ( n = 17) ( P < 0.05). UARI was 0.5 ± 0.03 in NP and 0.8 in RUPP rats and normalized to 0.5 in IL-4-treated RUPP rats ( P < 0.05). Plasma nitrate-nitrite levels increased in IL-4-treated RUPP rats, while placental preproendothelin-1 expression, plasma TNF-α and IL-6, and AT1-AA decreased in IL-4-treated RUPP rats compared with untreated RUPP rats ( P < 0.05). Circulating B cells and placental cytolytic natural killer cells decreased after IL-4 administration, while Th2 cells increased in IL-4-treated RUPP compared with untreated RUPP rats. This study illustrates that IL-4 decreased inflammation and improved Th2 numbers in RUPP rats and, ultimately, improved hypertension in response to placental ischemia during pregnancy. |
| Databáze: | OpenAIRE |
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