Intravenously Administered M6229 in Critically Ill Sepsis Patients (HistoSeps)

A Phase I Trial Evaluating the Safety, Tolerability and Pharmacokinetics of Intravenously Administered M6229 in Critically Ill Sepsis Patients - "HistoSeps"

Sepsis is a life-threatening organ dysfunction caused by a dysregulated host response to infection. Mortality is high and survivors frequently suffer from long-term sequelae. Extracellular histones have been identified as essential mediators in the pathogenesis of sepsis and septic shock. These toxic molecules are released by damaged cells in response to infection and high extracellular levels can induce tissue injury and multiple organ dysfunction syndrome. Extracellular histones can be neutralized by complexation with the new candidate drug called M6229, a non-anticoagulant heparin, allowing the use of elevated dose levels relative to regular unfractionated heparin. This project aims at the roll-out of a first-in-man clinical study in sepsis patients evaluating the safety, tolerability, pharmacokinetics and pharmacodynamic effects of intravenously administered M6229 in subjects suffering from sepsis.

Study Overview

• Status: Completed
• Conditions: Sepsis; Critical Illness; Septic Shock
• Intervention / Treatment: Drug: M6229

• Study Type: Interventional
• Enrollment (Actual): 10
• Phase: Phase 1

Contacts and Locations

Study Locations

• Netherlands
  • Limburg
    • Maastricht, Limburg, Netherlands, 6229HX
      • Maastricht UMC+
  • Noord-Holland
    • Amsterdam, Noord-Holland, Netherlands, 1105AZ
      • Amsterdam UMC, location AMC

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years and older (Adult, Older Adult)
• Accepts Healthy Volunteers: No

Description

Inclusion Criteria:

1. Male or female patients aged ≥ 18 years old.
2. Signed informed consent by patient or legal representative.

3. Diagnosed with sepsis, defined by the Sepsis-3 criteria as a life-threatening organ dysfunction caused by a dysregulated host response to an infection.

   Organ dysfunction is defined by 1 of the following:

   a. Increase in SOFA score of ≥2. i. The baseline SOFA score can be assumed to be zero in patients not known to have pre-existing organ dysfunction.

   b. Acute kidney injury i. Defined as eGFR < 15 mL/min. c. Acute respiratory distress syndrome i. Defined by the Berlin criteria. d. The need of mechanical ventilation. e. Alteration in mental status.

4. The patients have to be included in the study within 72 hours of ICU admission due to sepsis or within 72 hours after sepsis diagnosis on the ICU. M6229 has to be administered within 84 hours after ICU admission due to sepsis or within 84 hours after sepsis diagnosis on the ICU.

Exclusion Criteria:

1. Subject has an advance directive to withhold life-sustaining treatments.
2. Subject is breastfeeding or intents to get pregnant within 30 days of enrolling into the study.

3. Subject is of childbearing potential and has a positive pregnancy test.

   a. A woman is considered to be of childbearing potential under the age of 60 years, unless surgically sterile.

4. Clinical suspicion or confirmation of a viral hemorrhagic shock syndrome including, but not limited to, dengue fever.

5. Bleeding risk:

   a. Clinical: i. Active bleeding; ii. Head trauma; iii. Intracranial surgery or stroke in the past 3 months; iv. History of intracerebral arteriovenous malformation, cerebral aneurysm or mass lesions of the central nervous system; v. Cerebral haemorrhage; vi. History of a bleeding diatheses; vii. Gastrointestinal bleeding in the past 6 weeks; viii. Presence of an epidural or spinal catheter; ix. Contraindication for IV therapeutic UFH. b. Laboratory: i. Platelet count <50 x109/L; ii. INR >2.0; iii. Baseline aPTT ≥45 seconds prior to enrolment, 1.5x upper limit of normal (ULN).

6. Use of any of the following treatments:

   1. UFH to treat a thrombotic event within 12 hours before infusion;
   2. LMWH within 24 hours before infusion;
   3. Warfarin (if used within 7 days before study entry AND if the INR exceeds 2.0 at enrolment);
   4. Direct oral anticoagulant (DOAC) use 3 days prior to enrollment.
   5. Thrombolytic therapy within 3 previous days;
   6. Use of IIb/IIIa inhibitors within the previous 7 days.
7. Confirmed antiphospholipid syndrome.
8. Known allergy to fish.
9. Cardiopulmonary resuscitation in the previous 7 days.
10. Liver failure defined as Child-Pugh Score Class C.
11. Abnormal liver function (ASAT and/or ALAT > 5 times upper limit of normal (ULN)).
12. Extracorporeal membrane oxygenation (ECMO) support dependent.
13. Pulmonary embolism or clinical suspicion of deep venous thrombosis (DVT).
14. Life expectancy of less than 24 hours.
15. Treating physician refusal.
16. Known adverse reaction to UFH, including heparin induced thrombocytopenia (HIT).
17. Participation in any other investigational drug study or other interventional study with interfering endpoints.
18. Any other clinical condition which, in the opinion of the investigator, would not allow safe completion of the protocol.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: N/A
• Interventional Model: Single Group Assignment
• Masking: None (Open Label)

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
aPTT changes before, during and after infusion of M6229 [Safety and tolerability]	Anti-coagulation effects of M6229 determined by a change in aPTT at different time points during and after infusion of M6229.	Up to 72 hours after start infusion
Peak plasma concentration (Cmax) [Pharmacokinetics]	Peak plasma concentration of M6229 in plasma	Up to 72 hours after start infusion
Steady state concentration (Css) [Pharmacokinetics]	Steady state concentration of M6229 in plasma	Up to 72 hours after start infusion
Time to peak concentration (Tmax) [Pharmacokinetics]	Time to peak concentration of M6229 in plasma	Up to 72 hours after start infusion
Area under the plasma concentration versus time curve (AUC) [Pharmacokinetics]	Area under the plasma concentration versus time curve of M6229	Up to 72 hours after start infusion
Clearance [Pharmacokinetics]	Clearance of M6229	Up to 72 hours after start infusion
Terminal half-life (t1/2) [Pharmacokinetics]	Terminal half-life is the time required for the plasma concentration of M6229 to fall by 50% during the terminal phase	Up to 72 hours after start infusion
Volume of distribution (Vd) [Pharmacokinetics]	Volume of distribution of M6229	Up to 72 hours after start infusion
Histone plasma level changes before, during and after infusion of M6229 [Efficacy]	Change in histone plasma levels before and at different time-points after M6229 administration	Up to 72 hours after start infusion

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Incidence of excessive anti-coagulation effects [Safety and tolerability]	Excessive anti-coagulation effects are: Clinical evidence or suspicion of severe non-surgical bleeding, defined as the administration of ≥ 2 units of blood products in 24 hours from start of infusion;; aPTT > 90 seconds.	Up to 72 hours after start infusion
Incidence of adverse reactions [Safety and tolerability]	Adverse reactions that are considered definitely and probably related to M6229 as specified in the protocol.	Up to 72 hours after start infusion
Changes in ECG corrected QT interval (QTc) [Safety and tolerability]	Changes in ECGs QTc that are considered definitely and probably related to M6229	Up to 24 hours after start infusion
Amount of M6229 excreted in urine [Pharmacokinetics]	Urine pharmacokinetic parameters of M6229 (amount of M6229 excreted in urine)	Up to 24 hours after start infusion
Change in plasma levels of D-Dimer before, during and after M6229 administration [Efficacy]	Change in plasma levels of biomarkers of inflammation, coagulation and fibrinolysis (e.g. D-dimer, IL-6, IL-8) before and at different time-points after M6229 administration.	Up to 72 hours after start infusion
Change in plasma levels of interleukins before, during and after M6229 administration [Efficacy]	Change in plasma levels of biomarkers of inflammation, coagulation and fibrinolysis (e.g. D-dimer, IL-6, IL-8) before and at different time-points after M6229 administration.	Up to 72 hours after start infusion
Correlation of histone plasma levels and abovementioned biomarkers with M6229 plasma levels (PK/PD) [Efficacy]	Besides histone plasma levels, the investigators will also measure other biomarkers of inflammation, coagulation and fibrinolysis (e.g. D-dimer, IL-6, IL-8).	Up to 72 hours after start infusion
Severity of organ dysfunction based on Sequential Organ Failure Assessment (SOFA) score [Efficacy]	SOFA scores will be reported. Moreover, the investigators will compare these data with historic controls. For this, data will be used from a subset of patients included in a previously conducted study conducted in two tertiary teaching hospitals in the Netherlands named "Molecular Diagnosis and Risk Stratification of Sepsis" (MARS) study. The MARS study was a prospective observational study performed between January 2011 and January 2014 in the ICUs of the Amsterdam UMC, location AMC and UMC Utrecht.	30 days
Time on mechanical ventilation [Efficacy]	Ventilator free-days and time on mechanical ventilation. Data will be compared with historic controls from the MARS cohort.	30 days
Time on renal replacement therapy [Efficacy]	Renal replacement therapy free-days and time on renal replacement therapy. Data will be compared with historic controls from the MARS cohort.	30 days
Time on vasopression therapy [Efficacy]	Vasopressor free-days and time on vasopressors. Data will be compared with historic controls from the MARS cohort.	30 days
Length of stay [Efficacy]	ICU and hospital length of stays. Data will be compared with historic controls from the MARS cohort.	30 days
Mortality rate [Efficacy]	ICU and hospital mortality. Data will be compared with historic controls from the MARS cohort.	30 days

Collaborators and Investigators

• Sponsor: A.P.J. Vlaar
• Collaborators: Maastricht University Medical Center; Maastricht University; Matisse Pharmaceuticals
• Investigators: Principal Investigator: Alexander P Vlaar, MD, PhD, MBA, Department of Intensive Care Medicine, Amsterdam UMC, location AMC

Study record dates

Study Major Dates

• Study Start (Actual): April 5, 2022
• Primary Completion (Actual): September 28, 2023
• Study Completion (Actual): September 28, 2023

Study Registration Dates

• First Submitted: September 30, 2021
• First Submitted That Met QC Criteria: January 12, 2022
• First Posted (Actual): January 26, 2022

Study Record Updates

• Last Update Posted (Actual): March 25, 2025
• Last Update Submitted That Met QC Criteria: February 10, 2025
• Last Verified: February 1, 2025

More Information

Terms related to this study

• Keywords: septic shock; inflammation; sepsis; heparin; UFH; histones; M6229
• Additional Relevant MeSH Terms: Pathologic Processes; Disease Attributes; Infections; Systemic Inflammatory Response Syndrome; Inflammation; Shock; Critical Illness; Sepsis; Toxemia; Shock, Septic
• Other Study ID Numbers: NL77116.000.21

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: NO

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No
• product manufactured in and exported from the U.S.: No