Abstract:
AIM:Glutamine and glutamate are major mediators of secondary brain cell death during post-cardiac arrest syndrome. As there is an equilibrium between brain tissue and plasma concentrations of glutamine and glutamate, their elimination from systemic circulation by extracorporeal blood purification may ultimately lead to reduced secondary cell death in the brain. We hypothesized that systemic glutamine and glutamate can be significantly reduced by continuous venovenous hemodiafiltration (CVVHDF). METHODS:This was a prospective, randomized clinical trial in post cardiac-arrest survivors evaluating standard of care or additional CVVHDF over 72 h immediately after admission. Glutamine and glutamate plasma concentrations were analyzed at eight time points in both groups. Primary endpoint was reduction of glutamine and glutamate plasma concentrations. The trial has been registered at clinical trial.gov (NCT02963298). RESULTS:In total, 41 patients were randomized over a period of 12 months (control n = 21, CVVHDF n = 20). The primary aim reduction of glutamine and glutamate plasma concentrations by CVVHDF, was not achieved; both groups-maintained concentrations within a normal range over the study period (glutamate: 4.7-11.1 mg/dL; glutamine: 0.2-3.7 mg/dL). However, post-filter concentrations of glutamine and glutamate in CRRT patients were significantly decreased as compared to pre-filter concentrations (glutamate: pre-filter median 8.85 mg/dL IQR 7.1-9.6; post-filter 0.95 mg/dL IQR 0.5-2; p < 0.001; glutamine: pre-filter 0.7 mg/dL IQR 0.6-1; post-filter 0.2 mg/dL IQR 0-0.2; p < 0.001). CONCLUSION:In this trial, CVVHDF was not able to statistically significantly lower systemic plasma glutamine and glutamate levels. Post-cardiac arrest patients had plasma glutamine and glutamate levels within the normal range.
journal_name
Resuscitationjournal_title
Resuscitationauthors
Nee J,Jörres A,Krannich A,Leithner C,Schroeder T,Munk AL,Enghard P,Moore C,Steppan S,Storm Cdoi
10.1016/j.resuscitation.2019.09.020subject
Has Abstractpub_date
2019-11-01 00:00:00pages
54-59eissn
0300-9572issn
1873-1570pii
S0300-9572(19)30631-8journal_volume
144pub_type
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