Muñoz-Sánchez MÁ, Rodríguez-Rodríguez A, Egea-Guerrero JJ, Gordillo-Escobar E, Vilches-Arenas Á, Carrillo-Vico A, Guerrero JM, Murillo-Cabezas F. Urotensinergic system genes in experimental subarachnoid hemorrhage.
Med Intensiva 2017;
41:468-474. [PMID:
28081921 DOI:
10.1016/j.medin.2016.10.013]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2016] [Revised: 10/14/2016] [Accepted: 10/23/2016] [Indexed: 11/19/2022]
Abstract
OBJECTIVE
Cerebral vasospasm, one of the main complications of subarachnoid hemorrhage (SAH), is characterized by arterial constriction and mainly occurs from day 4 until the second week after the event. Urotensin-II (U-II) has been described as the most potent vasoconstrictor peptide in mammals. An analysis is made of the serum U-II concentrations and mRNA expression levels of U-II, urotensin related peptide (URP) and urotensin receptor (UT) genes in an experimental murine model of SAH.
DESIGN
An experimental study was carried out.
SETTING
Experimental operating room of the Biomedicine Institute of Seville (IBiS), Virgen del Rocío University Hospital (Seville, Spain).
PARTICIPANTS
96 Wistar rats: 74 SAH and 22 sham intervention animals.
INTERVENTIONS
Day 1: blood sampling, followed by the percutaneous injection of 100μl saline (sham) or blood (SAH) into the subarachnoid space. Day 5: blood sampling, followed by sacrifice of the animals.
MAIN VARIABLES OF INTEREST
Weight, early mortality, serum U-II levels, mRNA values for U-II, URP and UT.
RESULTS
Serum U-II levels increased in the SAH group from day 1 (0.62pg/mL [IQR 0.36-1.08]) to day 5 (0.74pg/mL [IQR 0.39-1.43]) (p<0.05), though not in the sham group (0.56pg/mL [IQR 0.06-0.83] day 1; 0.37pg/mL [IQR 0.23-0.62] day 5; p=0.959). Between-group differences were found on day 5 (p<0.05). The ROC analysis showed that the day 5 serum U-II levels (AUC=0.691), URP mRNA (AUC=0.706) and UT mRNA (AUC=0.713) could discriminate between sham and SAH rats. The normal serum U-II concentration range in rats was 0.56pg/mL (IQR 0.06-0.83).
CONCLUSION
The urotensinergic system is upregulated on day 5 in an experimental model of SAH.
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