Deoxycorticosterone acetate-salt hypertension activates placental growth factor in the spleen to couple sympathetic drive and immune system activation

Marialuisa Perrotta, Andrea Lori, Lorenzo Carnevale, Stefania Fardella, Giuseppe Cifelli, Roberta Iacobucci, Francesco Mastroiacovo, Daniele Iodice, Fabio Pallante, Marianna Storto, Giuseppe Lembo, Daniela Carnevale

Research output: Contribution to journalArticlepeer-review

Abstract

Aims Chronic increase of mineralocorticoids obtained by administration of deoxycorticosterone acetate (DOCA) results in salt-dependent hypertension in animals. Despite the lack of a generalized sympathoexcitation, DOCA-salt hypertension has been also associated to overdrive of peripheral nervous system in organs typically targeted by blood pressure (BP), as kidneys and vasculature. Aim of this study was to explore whether DOCA-salt recruits immune system by overactivating sympathetic nervous system in lymphoid organs and whether this is relevant for hypertension. Methods and results To evaluate the role of the neurosplenic sympathetic drive in DOCA-salt hypertension, we challenged splenectomized mice or mice with left coeliac ganglionectomy with DOCA-salt, observing that they were both unable to increase BP. Then, we evaluated by immunofluorescence and ELISA levels of the placental growth factor (PlGF) upon DOCA-salt challenge, which significantly increased the growth factor expression, but only in the presence of an intact neurosplenic sympathetic drive. When PlGF KO mice were subjected to DOCA-salt, they were significantly protected from the increased BP observed in WT mice under same experimental conditions. In addition, absence of PlGF hampered DOCA-salt mediated T cells co-stimulation and their consequent deployment towards kidneys where they infiltrated tissue and provoked end-organ damage. Conclusion Overall, our study demonstrates that DOCA-salt requires an intact sympathetic drive to the spleen for priming of immunity and consequent BP increase. The coupling of nervous system and immune cells activation in the splenic marginal zone is established through a sympathetic-mediated PlGF release, suggesting that this pathway could be a valid therapeutic target for hypertension.

Original languageEnglish
Pages (from-to)456-467
Number of pages12
JournalCardiovascular Research
Volume114
Issue number3
DOIs
Publication statusPublished - Mar 1 2018

Keywords

  • Deoxycorticosterone acetate
  • Hypertension
  • Lymphocyte
  • Placental growth factor
  • Sympathetic nervous system

ASJC Scopus subject areas

  • Physiology
  • Cardiology and Cardiovascular Medicine
  • Physiology (medical)

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