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RESCUESIL-8301 for Hemolytic Sickle Cell Disease Patients

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Study Aim

This study evaluates the effectiveness of SIL-8301 in increasing hemoglobin levels in adults with hemolytic sickle cell disease.

What is being tested

Senicapoc

+ Placebo

Drug
Who is being recruted

Anemia+6

+ Anemia, Hemolytic

+ Anemia, Hemolytic, Congenital

From 16 to 35 Years
See all eligibility criteria
How is the trial designed

Treatment Study

Placebo-ControlledPhase 2
Interventional
Study Start: January 2026
See protocol details

Summary

Principal SponsorBiossil Inc.
Study ContactHead of Regulatory and Operations
Last updated: January 28, 2026
Sourced from a government-validated database.Claim as a partner

Study start date: January 1, 2026

Actual date on which the first participant was enrolled.

This study is focused on determining the effectiveness and safety of a treatment called SIL-8301 (senicapoc) for people with sickle cell disease, a condition that affects the blood. Specifically, it targets those who experience a type of sickle cell disease characterized by frequent destruction of red blood cells (hemolytic phenotype) and have had fewer than two painful crises related to sickle cell per year. The study is significant because it aims to find better ways to manage this condition in patients who are already receiving the standard treatment, hydroxyurea, but continue to have low hemoglobin levels, which can lead to various complications. Participants in the study will either receive senicapoc or a placebo, which is a substance with no therapeutic effect, every day for a period of up to 24 weeks. They will continue their usual treatment with hydroxyurea. The main focus is to see if senicapoc can increase the hemoglobin levels in their blood by more than 1 gram per deciliter from the starting point. This increase is an important sign of improved red blood cell health. The study is carefully designed to measure these changes while ensuring the safety of participants.

Official TitleA Multicenter, Randomized, Double-blind, Placebo-controlled Study to Determine Efficacy and Safety of SIL-8301 in Sickle Cell Disease (SCD) Patients With a Predominantly Hemolytic Phenotype
Principal SponsorBiossil Inc.
Study ContactHead of Regulatory and Operations
Last updated: January 28, 2026
Sourced from a government-validated database.Claim as a partner

Protocol

This section provides details of the study plan, including how the study is designed and what the study is measuring.
Design Details

105 patients to be enrolled

Total number of participants that the clinical trial aims to recruit.

Treatment Study

These studies test new ways to treat a disease, condition, or health issue. The goal is to see if a new drug, therapy, or approach works better or has fewer side effects than existing options.



Eligibility

Researchers look for people who fit a certain description, called eligibility criteria: person's general health condition or prior treatments.
Conditions
Criteria

Any sex

Biological sex of participants that are eligible to enroll.

From 16 to 35 Years

Range of ages for which participants are eligible to join.

Healthy volunteers not allowed

If individuals who are healthy and do not have the condition being studied can participate.

Conditions

Pathology

AnemiaAnemia, HemolyticAnemia, Hemolytic, CongenitalAnemia, Sickle CellHematologic DiseasesHemic and Lymphatic DiseasesHemoglobinopathiesCongenital, Hereditary, and Neonatal Diseases and AbnormalitiesGenetic Diseases, Inborn

Criteria

Inclusion Criteria: * Documented diagnosis of sickle cell disease * 16-35 years of age * Hb ≤ 9.0 g/dL * History of no more than 1 acute SCD-related painful crises requiring a visit to a medical facility per year within the preceding 2 years * History of at least one hemolytic complication * Current treatment with hydroxyurea Exclusion Criteria: * Receipt of senicapoc in a previous investigational study * Current Red Blood Cell (RBC) transfusion or exchange transfusion program * History of pulmonary hypertension * Active cardiovascular, neurologic, endocrine, hepatic, or renal disorders * Diagnosis of cancer (except non-melanoma skin cancer in situ, cervical cancer in situ, or breast cancer in situ) within the last 5 years * History of liver disease

Study Plan

Find out more about all the medication administered in this study, their detailed description and what they involve.
Treatment Groups

2 intervention groups are designated in this study

50% chance of being blinded to the placebo group

Treatment Groups

Group I

Experimental
20 mg twice daily for 4 days, followed by 10 mg once daily for up to 24 weeks

Group II

Placebo
Matching placebo tablets twice daily for 4 days, followed by once daily for up to 24 weeks

Study Centers

These are the hospitals, clinics, or research facilities where the trial is being conducted. You can find the location closest to you and its status.
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