Next-Generation Sequencing Diagnostics of Bacteremia in Sepsis (NextGeneSiS)

• ClinicalTrials.gov Identifier: NCT03356249
• Recruitment Status: Recruiting
• First Posted: November 29, 2017
• Last Update Posted: April 29, 2021
• Sponsor: University Hospital Heidelberg
• Collaborators: Fraunhofer Institute for Interfacial Engineering and Biotechnology; Dietmar Hopp Stiftung GmbH
• Information provided by (Responsible Party): Thorsten Brenner, MD, University Hospital, Essen

Study Description

Brief Summary:

Sepsis remains a major challenge, even in modern intensive care medicine. The identification of the causative pathogen is crucial for an early optimization of the antimicrobial treatment regime in patients with sepsis. In this context, culture-based diagnostic procedures (e.g. blood cultures) represent the standard of care, although they are associated with relevant limitations. Therefore, culture independent methods (e.g. Next-Generation Sequencing (NGS)) seem to be an attractive alternative. By the identification of circulating cell-free DNA in the blood and the use of the quantitative sepsis indicating quantifier (SIQ) score, causing pathogens can be identified and potential contaminations can be excluded.

The goal of the presented study is therefore, to assess the diagnostic performance of a NGS-based approach for the detection of relevant infecting organisms in a big cohort of septic patients (n=500). Moreover, the plausibility of this NGS-based approach will be estimated by a panel of independent clinical specialists, retrospectively identifying potential changes in patients´ management based on NGS results.

Condition or disease	Intervention/treatment
Sepsis; Septic Shock	Diagnostic Test: Next-Generation Sequencing

Detailed Description:

Sepsis remains a major challenge, even in modern intensive care medicine. The identification of the causative pathogen is crucial for an early optimization of the antimicrobial treatment regime in patients with sepsis. In this context, culture-based diagnostic procedures (e.g., blood cultures) represent the standard of care, although they are associated with relevant limitations. Accordingly, culture-independent molecular diagnostic procedures might be of help for the identification of the causative pathogen in infected patients. Especially the concept of an unbiased sequence analysis of circulating cell-free DNA (cfDNA) from plasma samples of septic patients by next-generation sequencing (NGS) has recently been identified to be a promising diagnostic platform for critically ill patients suffering from bloodstream infections. Although this new approach might be more sensitive and specific than culture-based state-of-the-art technologies, additional clinical trials are needed to exactly define the performance as well as clinical value of a NGS-based approach.

Next GeneSiS is a prospective, observational, non-interventional, multicenter study to assess the diagnostic performance of a NGS-based approach for the detection of relevant infecting organisms in patients with suspected or proven sepsis (according to recent sepsis definitions [sepsis-3]) by the use of the quantitative sepsis indicating quantifier (SIQ) score in comparison to standard (culture-based) microbiological testings. Moreover, the clinical value of this NGS-based approach will be estimated by a panel of independent clinical specialists, retrospectively identifying potential changes in patients´ management based on NGS results. Further subgroup analyses will focus on the clinical value especially for patients suffering from a failure of empiric treatment within the first three days after onset (as assessed by (1.) death of the patient or lack of improvement of the patient´s clinical condition (in terms of an inadequate decrease of SOFA-score) or (2.) persistent high procalcitonin levels).

This prospective, observational, non-interventional, multicenter study trial for the first time investigates the performance as well as the clinical value of a NGS based approach for the detection of bacteremia in patients with sepsis and may therefore be a pivotal step toward the clinical use of NGS in this indication.

Two sets of blood cultures (2x aerobic / 2x anaerobic) will be collected at study inclusion (=Onset) as well as 72 hours afterwards (=72h). In parallel, plasma samples for NGS-based measurements need to be obtained as described previously. Further blood samples for NGS-based measurements can be collected whenever physicians order blood cultures (2x aerobic / 2x anaerobic) because of the clinical suspicion of a bloodstream infection (BSI) within the first 3 days after study inclusion. Results of microbiological routine diagnostics in specimens different from blood (e.g. body fluid, tissue, bronchoalveolar lavage, endotracheal aspirate) will be used for further analyses when they are obtained within a timeframe of ≤72 hours prior or after the timepoints for NGS-based measurements. Clinical data collection and (if possible) PCT measurements will be performed at Onset as well as at 72h after study inclusion. The final outcome evaluation of patients will be performed at 28 days.

Study Design

• Study Type: Observational
• Estimated Enrollment: 500 participants
• Observational Model: Cohort
• Time Perspective: Prospective
• Official Title: Next-Generation Sequencing Diagnostics of Bacteremia in Sepsis (Next GeneSiS-Trial) - Study Protocol for a Prospective, Observational, Non-interventional, Multicenter, Clinical Trial
• Actual Study Start Date: March 1, 2019
• Estimated Primary Completion Date: August 31, 2021
• Estimated Study Completion Date: December 31, 2021

Groups and Cohorts

Group/Cohort

Intervention/treatment

Sepsis Group; Patients (n=500) with suspected or proven sepsis or septic shock (according to the Sepsis-3 definitions).

Diagnostic Test: Next-Generation Sequencing; In 500 patients with suspected or proven sepsis or septic shock (according to the Sepsis-3 definitions), patients´ characteristics and routine blood parameters will be determined at sepsis onset as well as 72 hours afterwards. At the same time points, 2 sets of blood cultures and one blood tube for Next-Generation Sequencing (NGS)-diagnostics will be collected. An evaluation of outcome will be performed at 28 days after sepsis onset.

Outcome Measures

Primary Outcome Measures :

1. Sensitivity [%] (of the NGS-based SIQ-score in comparison to blood culture diagnostics, as the goldstandard for the identification of the causative pathogen in sepsis) [ Time Frame: 2 years ]
   Proportion of positives that are correctly identified as such.
2. Specificity [%] (of the NGS-based SIQ-score in comparison to blood culture diagnostics, as the goldstandard for the identification of the causative pathogen in sepsis) [ Time Frame: 2 years ]
   Proportion of negatives that are correctly identified as such.
3. Positive predictive value [%] (of the NGS-based SIQ-score in comparison to blood culture diagnostics, as the goldstandard for the identification of the causative pathogen in sepsis) [ Time Frame: 2 years ]
   Proportion of positives that are true positive.
4. Negative predictive value [%] (of the NGS-based SIQ-score in comparison to blood culture diagnostics, as the goldstandard for the identification of the causative pathogen in sepsis) [ Time Frame: 2 years ]
   Proportion of negatives that are true negative.
5. Cohen's kappa coefficient [no measuring unit; 0</=k</=1] (of the NGS-based SIQ-score in comparison to blood culture diagnostics, as the goldstandard for the identification of the causative pathogen in sepsis) [ Time Frame: 2 years ]
   Measurement of the interobserver agreement between both items.

Secondary Outcome Measures :

1. Plausibility [%] (of the NGS-based SIQ-score) [ Time Frame: 2,5 years ]
   Using a majority rule, SIQ-score results will be evaluated for plausibility by a panel of three independent clinical specialists not associated with the study site. Therefore, the panel will be provided with clinical case summaries, NGS results and standard-of-care results from all samples tested. Results of microbiological routine diagnostics in specimens different from blood (e.g. body fluid, tissue, bronchoalveolar lavage, endotracheal aspirate) will be included when they have been obtained within a timeframe of ≤72 hours prior or after the timepoints for NGS-based measurements.
2. Changes in therapy [%] (that may have occurred if the NGS-based SIQ-score had been available for clinical use) [ Time Frame: 2,5 years ]
   Using a majority rule, the clinical value of the NGS-based approach will be estimated by a panel of three independent clinical specialists not associated with the study site, retrospectively identifying potential changes in patients´ management based on NGS results. Therefore, the panel will be provided with clinical case summaries, NGS results and standard-of-care results from all samples tested. Results of microbiological routine diagnostics in specimens different from blood (e.g. body fluid, tissue, bronchoalveolar lavage, endotracheal aspirate) will be included when they have been obtained within a timeframe of ≤72 hours prior or after the timepoints for NGS-based measurements. To identify potential changes in antimicrobial management that may have occurred if the results from the NGS technology had been available for clinical use, the panel will be provided with a special questionnaire.

Biospecimen Retention:   Samples With DNA

Plasma samples with circulating cell-free DNA (cfDNA)

Eligibility Criteria

• Ages Eligible for Study: 18 Years to 99 Years (Adult, Older Adult)
• Sexes Eligible for Study: All
• Accepts Healthy Volunteers: No
• Sampling Method: Non-Probability Sample

Study Population

Patients with sepsis or septic shock according to the new sepsis definitions (Sepsis-3) with an onset <24h are eligible for study inclusion.

Criteria

Inclusion Criteria:

• Age ≥18yr
• Informed consent
• Sepsis (with an onset ≤24h): Patients with a life-threatening organ dysfunction caused by a dysregulated host response to a suspected or proven infection. Organ dysfunction can be identified as an acute change in total SOFA score ≥2 points consequent to the infection. Patients can also be promptly identified at the bedside with qSOFA, ie, alteration in mental status, systolic blood pressure ≤100mmHg, or respiratory rate ≥22/min.
• or Septic shock (with an onset ≤24h): Patients with septic shock can be identified with a clinical construct of sepsis with persisting hypotension requiring vasopressors to maintain mean arterial pressure (MAP) ≥65mmHg and having a serum lactate level >2mmol/L (18mg/dL) despite adequate volume resuscitation.

Exclusion Criteria:

• Age ≤18yr
• Refusal to give consent
• Patient will probably be discharged from the ICU within the first 72h following inclusion
• Palliative treatment intent
• Clinician is not committed to aggressive treatment
• Death is deemed imminent and inevitable
• Patients who had previously been included, but are readmitted to the ICU during the same hospitalization, will not be included a second time.

Contacts and Locations

Contacts

Contact: Thorsten Brenner, MD; +49 (0) 201 723 1401; thorsten.brenner@uk-essen.de

Locations

Germany

RWTH Aachen University; Recruiting

Aachen, Germany, 52074

Contact: Lukas Martin, MD

Klinikum Mittelbaden Baden-Baden Balg; Recruiting

Baden-Baden, Germany, 76532

Contact: Thomas Iber, MD

Charité - Universitätsmedizin Berlin; Recruiting

Berlin, Germany

Contact: Stefan Schaller, MD

Evangelisches Krankenhaus Bethel gGmbH; Recruiting

Bielefeld, Germany, 33617

Contact: Friedhelm Bach, MD

University Hospital Bonn; Recruiting

Bonn, Germany

Contact: Christian Putensen, MD

Klinikum Bremerhaven Reinkenheide gGmbH; Recruiting

Bremerhaven, Germany, 27574

Contact: Oliver Radke, MD

Duesseldorf University Hospital; Recruiting

Duesseldorf, Germany, 40225

Contact: Timo Brandenburger, MD

University Hospital Essen; Recruiting

Essen, Germany, 45147

Contact: Thorsten Brenner, MD

University Hospital Frankfurt; Recruiting

Frankfurt, Germany, 60590

Contact: Patrick Meybohm, MD

University Medical Center Göttingen; Recruiting

Göttingen, Germany, 37077

Contact: Onnen Mörer, MD

Medical School Hannover; Recruiting

Hannover, Germany, 30625

Contact: Klaudiusz Suchodolski, MD

University Hospital Heidelberg; Recruiting

Heidelberg, Germany, 69120

Contact: Sebastian Decker, MD

Kliniken Landkreis Heidenheim gGmbH; Recruiting

Heidenheim, Germany

Contact: Alexander Brinkmann, MD

University Hospital Köln; Recruiting

Köln, Germany

Contact: Fabian Dusse, MD

University Hospital Leipzig; Recruiting

Leipzig, Germany

Contact: Sirak Petros, MD

Evangelisches Krankenhaus Luckau gGmbH; Recruiting

Luckau, Germany, 15926

Contact: Ulrike Jäkel, MD

University Hospital rechts der Isar; Recruiting

Munich, Germany, 81675

Contact: Stefan Schaller, MD

University Hospital of Regensburg; Recruiting

Regensburg, Germany, 93053

Contact: Diane Bitzinger, MD

University of Rostock; Recruiting

Rostock, Germany, 18057

Contact: Tobias Schürholz, MD

University Hospital Tübingen; Recruiting

Tübingen, Germany, 72076

Contact: Helene Häberle, MD

Contact: Peter Rosenberger, MD

Ulm University Medical Center; Recruiting

Ulm, Germany, 89081

Contact: Hendrik Bracht, MD

Sponsors and Collaborators

University Hospital Heidelberg

Fraunhofer Institute for Interfacial Engineering and Biotechnology

Dietmar Hopp Stiftung GmbH

Investigators

• Principal Investigator: Thorsten Brenner, MD; University Hospital, Essen

More Information

Publications:

Decker SO, Sigl A, Grumaz C, Stevens P, Vainshtein Y, Zimmermann S, Weigand MA, Hofer S, Sohn K, Brenner T. Immune-Response Patterns and Next Generation Sequencing Diagnostics for the Detection of Mycoses in Patients with Septic Shock-Results of a Combined Clinical and Experimental Investigation. Int J Mol Sci. 2017 Aug 18;18(8). pii: E1796. doi: 10.3390/ijms18081796.

Grumaz S, Stevens P, Grumaz C, Decker SO, Weigand MA, Hofer S, Brenner T, von Haeseler A, Sohn K. Next-generation sequencing diagnostics of bacteremia in septic patients. Genome Med. 2016 Jul 1;8(1):73. doi: 10.1186/s13073-016-0326-8.

Publications automatically indexed to this study by ClinicalTrials.gov Identifier (NCT Number):

Brenner T, Decker SO, Grumaz S, Stevens P, Bruckner T, Schmoch T, Pletz MW, Bracht H, Hofer S, Marx G, Weigand MA, Sohn K; TIFOnet Critical Care Trials Group. Next-generation sequencing diagnostics of bacteremia in sepsis (Next GeneSiS-Trial): Study protocol of a prospective, observational, noninterventional, multicenter, clinical trial. Medicine (Baltimore). 2018 Feb;97(6):e9868. doi: 10.1097/MD.0000000000009868.

• Responsible Party: Thorsten Brenner, MD, Prof. Dr. med. Thorsten Brenner, MHBA, University Hospital, Essen
• ClinicalTrials.gov Identifier: NCT03356249
• Other Study ID Numbers: S-084/2017
• First Posted: November 29, 2017
• Last Update Posted: April 29, 2021
• Last Verified: April 2021

Individual Participant Data (IPD) Sharing Statement:

• Plan to Share IPD: No

• Studies a U.S. FDA-regulated Drug Product: No
• Studies a U.S. FDA-regulated Device Product: No

Keywords provided by Thorsten Brenner, MD, University Hospital, Essen:

Sepsis; Septic shock; Next-Generation Sequencing; Bacteremia

Additional relevant MeSH terms:

Sepsis; Toxemia; Shock, Septic; Bacteremia; Infections; Systemic Inflammatory Response Syndrome; Inflammation; Pathologic Processes; Shock; Bacterial Infections; Bacterial Infections and Mycoses