A Study to Assess the Safety and Effects of Different Doses of an Investigational Drug, BAY 3389934, in Healthy Japanese Volunteers.

NCT07176728 | Completed Phase 1

• 1 other identifier: 22371
• Study Type: interventional
• Target: 16
• Locations: 1 country
• Sites: 2

Brief Summary

This study is designed to evaluate a new investigational drug, BAY 3389934, in healthy Japanese volunteers. The primary purpose is to see how safe the drug is and how well it is tolerated by the body when given at different doses. BAY 3389934 is being developed for the potential treatment of a serious blood clotting condition called sepsis-associated disseminated intravascular coagulation (DIC). The research will be conducted as a single-blind, placebo-controlled, dose-escalation study. This means that participants will be randomly assigned to receive either the active drug (BAY 3389934) or a placebo (an inactive substance), and they will not know which one they are receiving. The study will involve up to 16 healthy male and female Japanese participants, aged between 18 and 55. The study consists of two parts, called dose steps. In the first step, participants will receive a single 4-hour intravenous (IV) infusion of BAY 3389934 at a dose of 15 mg/h, or a placebo. Based on the safety and tolerability results from this first step, a second, higher dose will be selected for the next group of participants in the second step. Throughout the study, researchers will closely monitor participants for any side effects (adverse events). They will also collect blood and urine samples to study how the drug is absorbed, distributed, and eliminated by the body (pharmacokinetics or PK) and what effects it has on the body's clotting system (pharmacodynamics or PD). This involves measuring specific substances in the blood, such as activated partial thromboplastin time (aPTT) and prothrombin time (PT). Participants will stay at the study center for 4 days and will have a follow-up visit 3 to 5 days after they are discharged. The information gathered from this study is crucial for the future clinical development of BAY 3389934 in Japan and for designing future studies in patients with septic DIC.

Conditions

Sepsis Associated Disseminated Intravascular Coagulation (DIC)

Keywords

Sepsis, Disseminated Intravascular Coagulation, Coagulopathy

Outcome Measures

Primary Outcomes (1)

• Number of Participants With Treatment-Emergent Adverse Events (TEAEs)

  Investigate the safety and tolerability of BAY 3389934 15 mg/h and a second, higher dose (will be determined based on the result of 15 mg/h dose step), 4-hours infusion, respectively.

  From start of study intervention until the follow-up visit (approximately 5 weeks)

Secondary Outcomes (7)

• Pharmacokinetic (PK) Profile of BAY 3389934 - Cmax

  From pre-dose (0 hours) up to 48 hours after start of infusion

• Pharmacokinetic (PK) Profile of BAY 3389934 - AUC

  From pre-dose (0 hours) up to 48 hours after start of infusion

• Pharmacokinetic (PK) Profile of BAY 3389934 - Cmax/D

  From pre-dose (0 hours) up to 48 hours after start of infusion

• Pharmacokinetic (PK) Profile of BAY 3389934 - AUC/D

  From pre-dose (0 hours) up to 48 hours after start of infusion

• Pharmacokinetic (PK) Profile of BAY 3389934 - t 1/2

  From pre-dose (0 hours) up to 48 hours after start of infusion

Study Arms (3)

Dose Step 1 BAY 3389934

EXPERIMENTAL

15 mg/h/ intravenous Single Dose for 4 h fasting

Drug: BAY 3389934

Dose Step 2 BAY 3389934

EXPERIMENTAL

Max. dose 35 mg / h / intravenous - actual dose will be determined after Dose Step 1 Single Dose for 4 h fasting

Drug: BAY 3389934

Dose Step 1 and Dose Step 2 Placebo

PLACEBO COMPARATOR

Placebo / intravenous Single Dose for 4 h Fasting

Drug: Matching Placebo / Diluent

Interventions

BAY 3389934 DRUG

Solution for intravenous infusion

Dose Step 1 BAY 3389934; Dose Step 2 BAY 3389934

Matching Placebo / Diluent DRUG

Solution for intravenous infusion

Dose Step 1 and Dose Step 2 Placebo

Eligibility Criteria

• Age: 18 Years - 55 Years
• Sex: all
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64)

You may qualify if:

• Participant must be 18 to 55 years of age inclusive.
• Participants who are overtly healthy Japanese as determined by medical evaluation.
• Body mass index (BMI) within the range 18 - 29.9 kg/m² (inclusive).
• Male participants must agree to use specified contraception during the study and for at least 90 days plus 5 half-lives after.
• Female participants must be a Woman of Nonchildbearing Potential (WONCBP).
• Capable of giving signed informed consent.
• Willing to comply with the requirements and restrictions listed in the protocol.

You may not qualify if:

• Any medical disorder, condition, or history that would impair participation.
• Known hypersensitivity to the study drug or its excipients.
• Known disorders with increased bleeding risk or known congenital/acquired coagulation disorders.
• Use of prescription drugs, over-the-counter drugs, or herbal products within 14 days or 5 half-lives before the study.
• Clinically relevant findings in the ECG, such as a QTcF over 450 msec.
• Systolic blood pressure below 90 mmHg or above 140 mmHg at screening and admission.
• Diastolic blood pressure below 40 mmHg or above 90 mmHg at screening and admission.
• Positive results for Hepatitis B, Hepatitis C, or HIV.
• Positive drug screening, alcohol breath test, or urine cotinine test.
• Clinically relevant deviations of the screened laboratory parameters from reference ranges at the screening visit.
• Positive pregnancy test.
• Donation of blood or plasma within specified timeframes before the study.
• Lack of compliance with lifestyle restrictions (e.g., alcohol, specific foods, strenuous activity).
• Previous participation in this or another clinical study within a specified timeframe.

Sponsors & Collaborators

• Bayer: lead

Study Sites (2)

SOUSEIKAI Fukuoka Mirai Hospital

Fukuoka, Fukuoka Pref, 813-0017, Japan

Location

SOUSEIKAI Fukuoka Mirai Hospital

Fukuoka, 813-0017, Japan

Location

MeSH Terms

Conditions

Sepsis; Disseminated Intravascular Coagulation; Hemostatic Disorders

Condition Hierarchy (Ancestors)

Infections; Systemic Inflammatory Response Syndrome; Inflammation; Pathologic Processes; Pathological Conditions, Signs and Symptoms; Blood Coagulation Disorders; Hematologic Diseases; Hemic and Lymphatic Diseases; Hemorrhagic Disorders; Thrombophilia; Vascular Diseases; Cardiovascular Diseases

Study Design

• Study Type: interventional
• Phase: phase 1
• Allocation: RANDOMIZED
• Masking: SINGLE
• Who Masked: PARTICIPANT
• Purpose: TREATMENT
• Intervention Model: SINGLE GROUP
• Sponsor Type: INDUSTRY
• Responsible Party: SPONSOR

Study Record Dates

• First Submitted: August 29, 2025
• First Posted: September 16, 2025
• Study Start: September 22, 2025
• Primary Completion: May 17, 2026
• Study Completion: May 17, 2026
• Last Updated: June 5, 2026

Record last verified: 2026-06

Data Sharing

• IPD Sharing: Will not share

Locations

JP (2)