PMID- 32661611 OWN - NLM STAT- MEDLINE DCOM- 20201201 LR - 20201201 IS - 1534-3111 (Electronic) IS - 1522-6417 (Print) IS - 1522-6417 (Linking) VI - 22 IP - 7 DP - 2020 Jul 13 TI - Molecular Mechanisms Underlying the Circadian Rhythm of Blood Pressure in Normotensive Subjects. PG - 50 LID - 10.1007/s11906-020-01063-z [doi] LID - 50 AB - PURPOSE OF REVIEW: Blood pressure (BP) follows a circadian rhythm (CR) in normotensive subjects. BP increases in the morning and decreases at night. This review aims at providing an up-to-date overview regarding the molecular mechanisms underlying the circadian regulation of BP. RECENT FINDINGS: The suprachiasmatic nucleus (SCN) is the regulatory center for CRs. In SCN astrocytes, the phosphorylated glycogen synthase kinase-3beta (pGSK-3beta) also follows a CR and its expression reaches a maximum in the morning and decreases at night. pGSK-3beta induces the beta-catenin migration to the nucleus. During the daytime, the nuclear beta-catenin increases the expression of the glutamate excitatory amino acid transporter 2 (EAAT2) and glutamine synthetase (GS). In SCN, EAAT2 removes glutamate from the synaptic cleft of glutamatergic neurons and transfers it to the astrocyte cytoplasm where GS converts glutamate into glutamine. Thus, glutamate decreases in the synaptic cleft. This decreases the stimulation of the glutamate receptors AMPA-R and NMDA-R located on glutamatergic post-synaptic neurons. Consequently, activation of NTS is decreased and BP increases. The opposite occurs at night. Despite several studies resulting from animal studies, the circadian regulation of BP appears largely controlled in normotensive subjects by the canonical WNT/beta-catenin pathway involving the SCN, astrocytes, and glutamatergic neurons. FAU - Lecarpentier, Yves AU - Lecarpentier Y AD - Centre de Recherche Clinique, Grand Hopital de l'Est Francilien, 77104, Meaux, France. yves.c.lecarpentier@gmail.com. FAU - Schussler, Olivier AU - Schussler O AD - Department of Thoracic surgery, Nouvel Hopital Civil, Hopitaux Universitaires de Strasbourg, Strasbourg, France. AD - Department of Cardiovascular Surgery, Research Laboratory, Geneva University Hospital, Geneva, Switzerland. FAU - Hebert, Jean-Louis AU - Hebert JL AD - Cardiology Institute, Pitie-Salpetriere Hospital, AP-HP, Paris, France. FAU - Vallee, Alexandre AU - Vallee A AD - Diagnosis and Therapeutic Center, Hypertension and Cardiovascular Prevention Unit, Paris-Descartes University, Hotel-Dieu Hospital, AP-HP, Paris, France. LA - eng PT - Journal Article PT - Review DEP - 20200713 PL - United States TA - Curr Hypertens Rep JT - Current hypertension reports JID - 100888982 RN - 3KX376GY7L (Glutamic Acid) SB - IM MH - Animals MH - Blood Pressure MH - *Circadian Rhythm MH - Glutamic Acid MH - Humans MH - *Hypertension MH - Suprachiasmatic Nucleus PMC - PMC7359176 OTO - NOTNLM OT - Arterial blood pressure OT - Astrocyte OT - Canonical WNT/beta-catenin pathway OT - Circadian rhythm OT - Glutamine synthetase, nucleus tractus solitarius OT - Glycogen synthase kinase OT - Suprachiasmatic nucleus COIS- The authors declare no conflicts of interest relevant to this manuscript. EDAT- 2020/07/15 06:00 MHDA- 2020/12/02 06:00 PMCR- 2020/07/13 CRDT- 2020/07/15 06:00 PHST- 2020/07/15 06:00 [entrez] PHST- 2020/07/15 06:00 [pubmed] PHST- 2020/12/02 06:00 [medline] PHST- 2020/07/13 00:00 [pmc-release] AID - 10.1007/s11906-020-01063-z [pii] AID - 1063 [pii] AID - 10.1007/s11906-020-01063-z [doi] PST - epublish SO - Curr Hypertens Rep. 2020 Jul 13;22(7):50. doi: 10.1007/s11906-020-01063-z.