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• W2022792673 abstract "Arginine vasopressin (AVP) levels are increased in hemorrhagic and septic shock. Measurement of AVP levels has limitations due to its short half-life and cumbersome detection method. Copeptin is a more stable peptide derived from the same precursor molecule. We evaluated the plasma copeptin concentration in two independent studies: first, in an experimental baboon model of hemorrhagic shock, and second, in a prospective observational study of 101 consecutive critically ill patients at a university hospital. Copeptin was measured with a newly developed sandwich immunoassay using two polyclonal antibodies to the C-terminal region (amino acid sequence 132-164) of pre-pro-AVP. Copeptin concentrations in hemorrhagic shock increased markedly from median (range) of 7.5 [2.7-13) to 269 pM (241-456 pM). After reperfusion, copeptin levels dropped within hours to a plateau of 27 pM (15-78 pM). In the critically ill patient cohort, copeptin values increased significantly with the severity of the disease and were in patients without sepsis [27.6 pM [2.3-297 pM]), in sepsis [50.0 pM [8.5-268 pM]), in severe sepsis [73.6 pM [15.3-317 pM]), and in septic shock [171.5 pM (35.1-504 pM] compared with 4.1 pM (1.0-13.8 pM) in healthy controls (P for all vs. controls <0.001). On admission, circulating copeptin levels were higher in nonsurvivors (171.5 pM, 46.5-504.0 pM) as compared with survivors (86.8 pM, 8.5-386.0 pM; P = 0.01). Copeptin levels correlated with basal cortisol levels (r = 0.42; P < 0.001) and osmolality (r = 0.42; P < 0.001). In a logistic regression model including other covariates besides copeptin (e.g., determinants of fluid status) on survival, serum copeptin levels were the only independent significant predictor of outcome (P = 0.03). Copeptin concentrations are elevated in hemorrhagic and septic shock. Copeptin was higher on admission in nonsurvivors as compared with survivors, suggesting copeptin as a prognostic marker in sepsis. The availability of a reliable assay for the measurement of AVP release can also prove useful for the assessment of fluid and osmosis status in various diseases." @default.
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• W2022792673 date "2007-08-01" @default.
• W2022792673 modified "2023-10-13" @default.
• W2022792673 title "COPEPTIN, A STABLE PEPTIDE OF THE ARGININE VASOPRESSIN PRECURSOR, IS ELEVATED IN HEMORRHAGIC AND SEPTIC SHOCK" @default.
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• W2022792673 doi "https://doi.org/10.1097/shk.0b013e318033e5da" @default.
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