A Pilot Study of Ruxolitinib in Secondary Hemophagocytic Syndrome

Phase 2

Completed

Conditions: Hemophagocytic Syndrome (HPS)

Interventions: Drug: Ruxolitinib

Registration Number: NCT02400463

Lead Sponsor: University of Michigan Rogel Cancer Center

Brief Summary: This is a pilot study to determine the efficacy of Ruxolitinib in secondary hemophagocytic syndrome. The primary objective is to assess the efficacy of ruxolitinib 15 mg PO twice daily in patients with HPS. The primary endpoint is overall survival at two months.

Detailed Description: Hemophagocytic Syndrome (HPS) is a disorder characterized by pathological activation of the immune system resulting in a systemic disorder characterized by excessive cytokine production and macrophage activation, culminating in cytopenias and evidence of hemophagocytosis on tissue specimens. The disorder can be sporadic or familial due to one of several mutations and is primarily seen in the pediatric population, with a reported incidence of 1 case per 3000 admissions. The actual incidence in adults is unknown and can be rarely sporadic, or secondary to viral infections, malignancy, or autoimmune disease.

HPS is a universally fatal disease if untreated. In adults, the median survival has been reported to be less than 2 months if diagnosis and treatment is delayed. Adult patients are treated with pediatric protocols with early institution of etoposide and steroids and consolidation with allogeneic stem cell transplant in appropriately selected patients if a familial form is identified. Other treatment strategies have been attempted, including rituximab, infliximab, entaracept, tocilizumab, and alemtuzumab. These anecdotal reports highlight the therapeutic potential of cytokine-targeted therapies in this disorder.

This is a pilot study to determine the efficacy of Ruxolitinib in secondary hemophagocytic syndrome. The primary objective is to assess the efficacy of ruxolitinib 15 mg PO twice daily in patients with HPS. The primary endpoint is overall survival at two months.

Patients will receive Ruxolitinib at 15 mg twice daily orally either on an empty stomach or with food for 4 weeks (28 days) in a 4 week (28 day) cycle. Ruxolitinib will be administered in continuous 28-day cycles.

In the absence of treatment delays or cessation due to adverse events, treatment may continue indefinitely or until one of the following criteria applies:

* Disease progression.

* Intercurrent illness that prevents further administration of treatment.

* The investigator considers it, for safety reasons, to be in the best interest of the patient.

* Unacceptable adverse events such as any toxicity or other issue that causes a delay of study drug administration by more than 4 weeks.

* General or specific changes in the patient's condition render the patient unacceptable for further treatment in the judgment of the investigator.

* Patient decision to withdraw from treatment (partial consent) or from the study (full consent.

* Death.

Patients will be followed for toxicity for 30 days after treatment has been discontinued or until death, whichever occurs first.

Recruitment & Eligibility

Status: COMPLETED

Sex: All

Target Recruitment: 6

Inclusion Criteria

Patients, or their legally authorized representative, must voluntarily provide written IRB-approved informed consent.
Males and females, 18 years of age or older at the time of enrollment.
Patients must meet the diagnostic criteria for HPS (at least 5 of the following): fever, splenomegaly, cytopenia involving ≥2 cell lines (Hemoglobin <9 g/dL; platelets <100,000/μL; absolute neutrophil count <1000/μL), hypertriglyceridemia or hypofibrinogenemia, tissue demonstration of hemophagocytosis, low or absent NK (Natural Killer) cell activity, serum ferritin ≥3000 ug/L, soluble IL-2 receptor (CD25) >2400 U/mL.
In the investigator's opinion, the patient has the ability to participate fully in the study, and comply with all its requirements.

Exclusion Criteria

CNS (Central Nervous System) involvement
Malabsorption
Known secondary HPS (Hemophagocytic Syndrome) that is otherwise treatable (e.g. non-Hodgkin's lymphoma).
Pregnant or lactating female: all females of child-bearing potential must have a negative serum pregnancy test within 7 days of treatment; lactating females must discontinue breast feeding.
Estimated creatinine clearance <15mL/min
Has received any prior systemic therapy, excluding corticosteroids, within 7 days (or 5 half-lives) of treatment.
No active malignancy at the time of enrollment, except nonmelanoma skin cancers or carcinoma in situ. Patients with a prior history of malignancy are eligible if their malignancy has been definitely treated or is in remission and does not require ongoing adjuvant or cancer-directed therapies.
Active hepatitis B or hepatitis C or known HIV infection
Known (and biopsy-confirmed) liver cirrhosis; or, a reported history of liver cirrhosis with a Model for End-stage Liver Disease (MELD) score >20.

Study & Design

Study Type: INTERVENTIONAL

Study Design: SINGLE_GROUP

Arm && Interventions

Group	Intervention	Description
Ruxolitinib	Ruxolitinib	Ruxolitinib 15 mg by mouth twice daily. For patients unable to ingest tablets, ruxolitinib suspended in water may be administered through a nasogastric (NG) or percutaneous endoscopy gastrostomy (PEG) tube.

Primary Outcome Measures

Name	Time	Method
Overall Survival at 2 Months	2 Months	Number of Patients Alive at 2 Months after the first administration of ruxolitinib.

Secondary Outcome Measures

Name	Time	Method
Percentage of Patients With a Response to Treatment With Ruxolitinib	2 Months	Complete response is defined as complete normalization of all quantifiable symptoms and laboratory abnormalities. A partial response is defined as at least a 25% improvement in two or more quantifiable symptoms/laboratory markers.
Duration of Response	Up to 3 years (Due to funding and other constraints, participant follow-up was discontinued in 2020. Thus, not all participants were followed for a full three years.)	Duration will be calculated from the date of the determination of partial response or better until the date of progression, death, or additional non-protocol therapy.
Progression Free Survival Time	Up to 3 years (Due to funding and other constraints, participant follow-up was discontinued in 2020. Thus, not all participants were followed for a full three years.)	Progressive Disease is defined as at least a 50% worsening in two or more quantifiable laboratory markers. Calculated from the first administration of ruxolitinib until the date of progression or death.
Regimen Related Toxicities	Up to 30 days after last treatment administration	Incidence and grade of adverse events (AEs) unlikely, possibly or probably related to treatment (tx) with ruxolitinib. Graded per Common Terminology Criteria for Adverse Events (CTCAE) v.4. Grade refers to the severity of the AE, from mild (grade 1) to life-threatening (grade 4).