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Parenclitic network mapping identifies response to targeted albumin therapy in patients hospitalized with decompensated cirrhosis
Oyelade T, Forrest E, Moore KP, O'Brien A, Mani AR
Clinical and translational gastroenterology. 2023
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Abstract
BACKGROUND The efficacy of targeted albumin therapy in the management of decompensatory events in cirrhosis is unclear with different reports showing conflicting results. It is possible that only certain subgroups of patients may benefit from targeted albumin administration. However, extensive conventional subgroup analyses have not yet identified these subgroups. Albumin is an important regulator of physiological networks and may interact with homeostatic mechanism differently in patients according to the integrity of their physiological network. In the present study we aimed to assess the value of network mapping in predicting response to targeted albumin therapy in patients with cirrhosis. METHOD This is a sub-study of the ATTIRE trial; a multicentre, randomized trial conducted to assess the effect of targeted albumin therapy in cirrhosis. Baseline serum bilirubin, albumin, sodium, creatinine, CRP, and white cell count (WCC), international normalised ratio, heart rate, and blood pressure of 777 patients followed up for 6 months were used for network mapping using parenclitic analysis. Parenclitic network analysis involves measuring the deviation of each individual patient from the existing network of physiological interactions in a reference population. RESULT Overall network connectivity as well as deviations along WCC-CRP axis predicted 6-month survival independent of age and model for end-stage liver disease (MELD) in the standard care arm. Patients with lower deviation along the WCC-CRP axis showed lower survival in response to targeted albumin administration over 6-month follow-up period. Likewise, patients with higher overall physiological connectivity survived significantly less than the standard care group following targeted albumin infusion. CONCLUSION The parenclitic network mapping can predict survival of patients with cirrhosis and identify patient subgroups that don't benefit from targeted albumin therapy.
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A Randomized Trial of Albumin Infusions in Hospitalized Patients with Cirrhosis
China L, Freemantle N, Forrest E, Kallis Y, Ryder SD, Wright G, Portal AJ, Becares Salles N, Gilroy DW, O'Brien A
The New England journal of medicine. 2021;384(9):808-817
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Editor's Choice
Abstract
BACKGROUND Infection and increased systemic inflammation cause organ dysfunction and death in patients with decompensated cirrhosis. Preclinical studies provide support for an antiinflammatory role of albumin, but confirmatory large-scale clinical trials are lacking. Whether targeting a serum albumin level of 30 g per liter or greater in these patients with repeated daily infusions of 20% human albumin solution, as compared with standard care, would reduce the incidences of infection, kidney dysfunction, and death is unknown. METHODS We conducted a randomized, multicenter, open-label, parallel-group trial involving hospitalized patients with decompensated cirrhosis who had a serum albumin level of less than 30 g per liter at enrollment. Patients were randomly assigned to receive either targeted 20% human albumin solution for up to 14 days or until discharge, whichever came first, or standard care. Treatment commenced within 3 days after admission. The composite primary end point was new infection, kidney dysfunction, or death between days 3 and 15 after the initiation of treatment. RESULTS A total of 777 patients underwent randomization, and alcohol was reported to be a cause of cirrhosis in most of these patients. A median total infusion of albumin of 200 g (interquartile range, 140 to 280) per patient was administered to the targeted albumin group (increasing the albumin level to ≥30 g per liter), as compared with a median of 20 g (interquartile range, 0 to 120) per patient administered to the standard-care group (adjusted mean difference, 143 g; 95% confidence interval [CI], 127 to 158.2). The percentage of patients with a primary end-point event did not differ significantly between the targeted albumin group (113 of 380 patients [29.7%]) and the standard-care group (120 of 397 patients [30.2%]) (adjusted odds ratio, 0.98; 95% CI, 0.71 to 1.33; P = 0.87). A time-to-event analysis in which data were censored at the time of discharge or at day 15 also showed no significant between-group difference (hazard ratio, 1.04; 95% CI, 0.81 to 1.35). More severe or life-threatening serious adverse events occurred in the albumin group than in the standard-care group. CONCLUSIONS In patients hospitalized with decompensated cirrhosis, albumin infusions to increase the albumin level to a target of 30 g per liter or more was not more beneficial than the current standard care in the United Kingdom. (Funded by the Health Innovation Challenge Fund; ATTIRE EudraCT number, 2014-002300-24; ISRCT number, N14174793.).
PICO Summary
Population
Hospitalized patients with cirrhosis enrolled in the ATTIRE trial (n= 777).
Intervention
Targeted 20% human albumin solution (n= 380).
Comparison
Standard care (n= 397).
Outcome
The composite primary end point was new infection, kidney dysfunction, or death between days 3 and 15 after the initiation of treatment. The percentage of patients with a primary end point event did not differ significantly between the targeted albumin group (113 of 380 patients [29.7%]) and the standard-care group (120 of 397 patients [30.2%]). A time-to-event analysis in which data were censored at the time of discharge or at day 15 also showed no significant between-group difference. More severe or life-threatening serious adverse events occurred in the albumin group than in the standard-care group.
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Targeted Albumin Therapy Does Not Improve Short-Term Outcome in Hyponatremic Patients Hospitalized With Complications of Cirrhosis: Data From the ATTIRE Trial
China L, Freemantle N, Forrest E, Kallis Y, Ryder SD, Wright G, O'Brien A
The American journal of gastroenterology. 2021
Abstract
INTRODUCTION Patients with decompensated cirrhosis and hyponatremia have a poor prognosis. We investigated Albumin to Prevent Infection in Chronic Liver Failure trial data to determine whether targeted albumin infusions improved outcome in patients with hyponatremia at baseline. METHODS We examined the interaction between targeted albumin and standard care for the composite primary end point, stratifying by baseline sodium ≥ and <130 mmol/L. RESULTS Randomization to albumin was associated with a significant increase in sodium; however, there was no interaction between sodium category and treatment for the trial primary end point. DISCUSSION Targeted intravenous albumin infusions increased serum sodium level in hospitalized hyponatremic patients with cirrhosis, but this did not improve outcome.