A Study to Evaluate Isavuconazonium Sulfate for the Treatment of Invasive Aspergillosis (IA) or Invasive Mucormycosis (IM) in Pediatric Participants

Astellas Pharma Global Development, Inc.31 enrolled

Overview

The purpose of this study was to evaluate the safety, tolerability, and efficacy of isavuconazonium sulfate in pediatric participants.

Treatment began on Day 1 and then participants were followed for 60 days post-last dose for safety. Treatment was administered until the participant had a successful outcome or for a maximum duration of 84 days (IA) or 180 days (IM), whichever occured first. Participants received a loading regimen of isavuconazonium sulfate (via intravenous or oral administration at the investigator's discretion), which consisted of a dose every 8 hours (± 2 hours) on Days 1 and 2 (for a total of 6 doses), followed by once daily maintenance dosing for up to 84 days (IA) or 180 days (IM) of dosing. The first maintenance dose started 12 to 24 hours after the administration of the last loading dose. Subsequent maintenance doses were administered once daily (24 hours ± 2 hours from the previous maintenance dose). The oral formulation could only be given to participants 6 years to \< 18 years of age and with a body weight of at least 12 kg. Participants who were discharged from the hospital with oral capsules for at-home administration had to return weekly for study drug accountability and to receive new oral dosing supplies. Participants who began oral administration were to complete the oral dosing acceptability assessment after ingesting their first oral dose.

Study Type

INTERVENTIONAL

Allocation

NON_RANDOMIZED

Purpose

TREATMENT

Masking

NONE

Enrollment

Conditions

Invasive Mucormycosis Invasive Aspergillosis

Interventions

Isavuconazonium sulfateDRUG

Intravenous (IV) infusion

Isavuconazonium sulfateDRUG

Oral capsule

Eligibility

Sex: ALLMin age: 1 YearMax age: 17 Years

Medical Language ↔ Plain English

Inclusion Criteria: * Subject diagnosed with IA or IM. A positive diagnosis is defined as follows: * Proven, probable or possible IFI per the European Organisation for Research and Treatment of Cancer/Mycoses Study Group \[EORTC/MSG\], 2008 criteria Note: Subjects with "possible" IFI will be eligible for enrollment; however, diagnostic tests to confirm the invasive fungal disease as "probable" or "proven" according to the EORTC/MSG criteria should be completed within 10 calendar days after the first dose of study drug * Note: In addition to the criteria set for mycological criteria by the EORTC/MSG in 2008, and only for subjects with an underlying hematologic malignancy or recipients of hematopoietic stem cell transplant (HSCT) who also have clinical and radiologic features consistent with invasive fungal infection, the following are acceptable: * Galactomannan (GM) levels (optical density index) meeting the below criteria are acceptable mycological evidence for enrollment or upgrading the diagnosis to probable IA: * 1\. A single value for serum or bronchoalveolar lavage (BAL) fluid of ≥ 1.0 or * 2\. Two serum GM values of ≥ 0.5 from two separate samples * Subject has sufficient venous access to permit intravenous administration of study drug or the ability to swallow oral capsules * A female subject is eligible to participate if not pregnant and at least one of the following conditions applies: * Not a subject who is of childbearing potential, OR * Subject who is of childbearing potential who agrees to follow a contraceptive guidance throughout the treatment period and for at least 30 days after the final study drug administration * Subject and subject's parent(s) or legal guardian agree that the subject will not participate in another interventional study while on treatment with the exception of oncology trials Exclusion Criteria: * Subject has familial short QT syndrome, is receiving medications that are known to shorten the QT interval, or has a clinically significant abnormal ECG * Subject has evidence of hepatic dysfunction defined as any of the following: * Total bilirubin (TBL) ≥ 3 times the upper limit of normal (ULN) * Alanine transaminase (ALT) or aspartate transaminase (AST) ≥ 5 times the ULN * Known cirrhosis or chronic hepatic failure * Subject has used strong cytochrome P450 (CYP3A4) inhibitors or inducers such as ketoconazole, high dose ritonavir, rifampin/rifampicin, long acting barbiturates (e.g., phenytoin), carbamazepine and St. John's Wort in the 5 days prior to the first dose of study drug * Subject has another IFI other than possible, probably or proven IA or IM * Subject has chronic aspergillosis, aspergilloma or allergic bronchopulmonary aspergillosis * Subject has received mould active systemic antifungal therapy, effective against the primary IMI, for more than four days during the seven days preceding the first dose * Note: Prior use of prophylactic antifungal therapy is acceptable. In case of breakthrough IA while on prophylactic mould-active azole class drugs, additional documentation will be required to be submitted to the sponsor medical monitor or designee to approve subject enrollment * Subject has known history of allergy, hypersensitivity or any serious reaction to any of the azole class antifungals, or any components of the study drug formulation * Subject has any condition which makes the subject unsuitable for study participation * Subject is unlikely to survive 30 days * Subject has received investigational drug, with the exception of oncology drug trials, or trials with investigational drugs treating graft versus host disease, within 28 days or five half-lives, whichever is longer, prior to screening

Locations (10)

Children's Hospital, Los Angeles

Los Angeles, California, United States

University of California - Los Angeles

Los Angeles, California, United States

Children's Hospital of Orange County

Orange, California, United States

Outcomes

Primary Outcomes

Number of Participants With Treatment Emergent Adverse Events (TEAEs)

An AE is any untoward medical occurrence in a participant administered a study drug, which does not have to have a causal relationship with this treatment. It can be any unfavorable sign, symptom, or disease temporally associated with the use of a medicinal product. TEAE is defined as an AE observed after starting administration of the study drug through 30 days after the last dose.

Time frame: From first dose to 30 days after the last dose (maximum 210 Days)

Percentage of Participants With All - Cause Mortality Through Day 42

All - Cause Mortality Through Day 42

Time frame: Baseline up to 42 days

Secondary Outcomes

Percentage of Participants With All - Cause Mortality

EOT was defined as anytime from "day 1 to a maximum of day 180". Data reported in the table below for each category, i.e., Day 84 represented data between Day 1 and Day 84 and for EOT, data represented between Day 1 to the EOT day for each individual. Participants who died after EOT assessment but before reaching Day 84 were included in the data for Day 84 category. Only those deaths that occurred after Day 84 would be included in EOT category if the death occurred during the treatment period (i.e. prior to the EOT).

Time frame: Baseline up to day 84 and end of treatment (EOT) (up to a maximum of 180 days) (Average duration of treatment: 57.7 days)

Percentage of Participants With Overall Response: Adjudication Committee (AC) Assessment

Overall response was based on a composite of clinical, mycological, and radiological responses with success criteria assessed. Success criteria as assessed by AC in: Clinical response: * Complete: Resolution of all attributable clinical symptoms and physical findings * Partial: Resolution of at Least some of the clinical symptoms and physical findings associated with IFD Mycological response: * Eradication: No growth of the original (at baseline) causative organism on culture or identified by histology/cytology on post baseline (after day 7) cultures and/or histology/cytology * Presumed eradication: Missing post baseline documentation of eradication of the original causative organism at baseline PLUS resolution of all or some clinical symptoms/physical finding Radiological response: * Complete: ≥ 90% improvement * Partial: At least \< 25% response at day 42 and at least 50% by Day 84

Data from ClinicalTrials.gov

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