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Randomized Controlled Trial
. 2022 Jul;48(7):899-909.
doi: 10.1007/s00134-022-06745-7. Epub 2022 Jun 17.

Immune enhancement in patients with predicted severe acute necrotising pancreatitis: a multicentre double-blind randomised controlled trial

Collaborators, Affiliations
Randomized Controlled Trial

Immune enhancement in patients with predicted severe acute necrotising pancreatitis: a multicentre double-blind randomised controlled trial

Lu Ke et al. Intensive Care Med. 2022 Jul.

Abstract

Purpose: Infected pancreatic necrosis (IPN) is a highly morbid complication of acute necrotising pancreatitis (ANP). Since there is evidence of early-onset immunosuppression in acute pancreatitis, immune enhancement may be a therapeutic option. This trial aimed to evaluate whether early immune-enhancing Thymosin alpha 1 (Tα1) treatment reduces the incidence of IPN in patients with predicted severe ANP.

Methods: We conducted a multicentre, double-blind, randomised, placebo-controlled trial involving ANP patients with an Acute Physiology and Chronic Health Evaluation II (APACHE II) score ≥ 8 and a computed tomography (CT) severity score ≥ 5 admitted within 7 days of the advent of symptoms. Enrolled patients were assigned to receive a subcutaneous injection of Tα1 1.6 mg every 12 h for the first 7 days and 1.6 mg once a day for the subsequent 7 days or matching placebos (normal saline). The primary outcome was the development of IPN during the index admission.

Results: A total of 508 patients were randomised, of whom 254 were assigned to receive Tα1 and 254 placebo. The vast majority of the participants required admission to the intensive care unit (ICU) (479/508, 94.3%). During the index admission, 40/254(15.7%) patients in the Tα1 group developed IPN compared with 46/254 patients (18.1%) in the placebo group (difference -2.4% [95% CI - 7.4 to 5.1%]; p = 0.48). The results were similar across four predefined subgroups. There was no difference in other major complications, including new-onset organ failure (10.6% vs. 15%), bleeding (6.3% vs. 3.5%), and gastrointestinal fistula (2% vs. 2.4%).

Conclusion: The immune-enhancing Tα1 treatment of patients with predicted severe ANP did not reduce the incidence of IPN during the index admission.

Keywords: Acute pancreatitis; Immunosuppression; Infection; Pancreatic necrosis; Thymosin.

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Conflict of interest statement

WL reports consultancy fees and grants from SciClone Pharmaceuticals. ZT reports speaker fees from SciClone Pharmaceuticals. LK reports speaker fees from SciClone Pharmaceuticals. VS reports consultant fees and grants Abbvie, medical advisory board participant for Envara, and grants from Theraly and Orgenesis. The other authors have no relevant conflict of interest to declare.

Figures

Fig. 1
Fig. 1
Enrolment, randomisation, and follow-up of patients in the TRACE trial. TRACE denotes thymosin α1 in prevention of infected pancreatic necrosis following acute necrotising pancreatitis. APACHE II denotes acute physiology and chronic health evaluation II. CTSI denotes computed tomography severity index. ITT denotes intention to treat. Tα1 denotes Thymosin α1
Fig. 2
Fig. 2
Time- to-infection by day 90. The Kaplan–Meier curves for the cumulative incidence of infected pancreatic necrosis from randomisation to day 90 in the intention-to-treat population
Fig. 3
Fig. 3
Subgroup analysis of the risk of infected pancreatic necrosis by the index hospital discharge and day 90. Panel A shows the risk difference of infected pancreatic necrosis during the index admission between the two treatment groups. Panel B shows the risk difference of infected pancreatic necrosis up to 90 days after randomisation. A risk difference of less than 0 indicates better results for the Tα1 group

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