PTX3-targeted Antifungal Prophylaxis

Acute Myeloid Leukemia Clinical Trial

— PTX3AML  

Official title:

PTX3 Genetically Stratified Randomized Double-blinded Allocation Event-driven Clinical Trial for Antifungal Prophylaxis in Patients With Acute Myeloid Leukemia

Clinical Trial Details — Status: Recruiting

Administrative data

• NCT number: NCT03828773
• Other study ID #: 2018-01671
• Status: Recruiting
• Phase: N/A
• Start date: February 11, 2019
• Est. completion date: November 30, 2025

Study information

• Verified date: February 2024
• Source: Centre Hospitalier Universitaire Vaudois
• Contact: Pierre-Yves Bochud, MD
• Phone: 0041 213144379
• Email: Pierre-Yves.Bochud[@]chuv.ch
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

This is a prospective genetically-stratified randomized double-blind event-driven multicentre clinical trial to assess the efficacy of posaconazole-based antifungal prophylaxis allocation strategies for patients with acute myeloid leukemia who receive induction chemotherapy. Allocation strategy based on an invasive mold infection genetic risk will be double-blinded.

Description:

Background: Invasive mold infections (IMI, grouping infections due to Aspergillus spp [IA] and non-Aspergillus mold) are a major concern in hematological patients, such as those with acute myeloid leukemia (AML) or myelodysplastic syndrome in transformation (MDSit), collectively named AML/MDSit in this protocol, or those undergoing hematopoietic cell transplantation (HCT), with incidence and mortality rates ranging between 3-15% and 25-45%, respectively. Primary antifungal prophylaxis has become the standard of care in such patients. Historically, fluconazole (inactive against IA) was used as prophylaxis and allowed for significant decrease in invasive candidiasis (IC). More recently, posaconazole (a broad-spectrum azole active against IA and other non-Aspergillus filamentous molds) was approved for primary antifungal prophylaxis in high-risk patient categories. However, universal prophylaxis with posaconazole has been challenged, based on the relatively low incidence of IMI and the large number of patients needed to treat. Moreover, administration of broad-spectrum azoles is costly and associated with a large number of complications. Hence, there is an urgent need to optimize antifungal prophylaxis by identifying those patients with the highest risk for IMI to receive a broad-spectrum azole. Pentraxin-3 (PTX3), a pattern recognition receptor, recognizes and binds to Aspergillus conidia, facilitates opsonization and subsequently leads to complement and phagocyte activation. Two single nucleotide polymorphisms (SNPs) in the gene encoding PTX3 have been identified as strong predictors for IA and/or IMI in human studies. What makes PTX3 SNPs different and important in clinical practice is: (i) the extent and reproducibility of basic science data with regards to PTX3 and IA, (ii) the validation of PTX3 SNPs associations with IA in many different patient populations, and (iii) the high frequency of minor allele in the general population. The investigators hypothesize that PTX3 SNPs could be used to identify patients at high risk for IMI, who will benefit the most from antifungal prophylaxis with broad-spectrum azoles. Overall objective: The overall aim of this project is to assess the effectiveness of the use of posaconazole-based antifungal prophylaxis in AML/MDSit patients in high risk group (single or double single homozygotes PTX-3 SNPs). Exploratory objectives are to assess the effectiveness of PTX3 SNPs testing to stratify the use of posaconazole-based antifungal prophylaxis in AML/MDSit patients according to low or high risk genotypes. Methods: Eligible patients will be tested by competitive allele-specific Polymerase Chain Reaction (PCR) from blood-extracted DNA samples for the presence of PTX3 SNPs rs230561 and rs3816527. Randomisation based on genetic testing will be performed at the latest 24h after the first neutropenia day (D0). Patients will be stratified based on genotyping results in two unbalanced strata: stratum A (high-risk PTX3 SNPs) to be randomized 1:1 posaconazole prophylaxis vs fluconazole and stratum-B (low-risk PTX3 SNPs) to be randomized 1:3 in favour of Fluconazole. Patients will be assessed for a diagnosis of possible, probable or proven Invasive Fungal Infections (IFI) based on consensus definition guidelines by the European Organization for Research and Treatment of Cancer/Mycoses Study Group (EORTC/MSG) groups during 180 days after prophylaxis initiation. Impact: The results of this study may contribute to the optimization of primary antifungal prophylaxis, by preventing IMI while limiting the use of broad-spectrum azoles, thus decreasing complications and costs. This study is one of the first interventional clinical trials to use genetic factors for risk stratification in the field of hematology and infectious diseases, a concept frequently emphasized, however barely transcribed in practice, as precision medicine. Furthermore, the scope of the proposed study expands beyond the specific patient population. The results of this study could be used in the design and initiation of similar efforts in other high-risk patient categories, including allogeneic HCT and solid organ transplant (SOT) recipients.

Recruitment information / eligibility

• Status: Recruiting
• Enrollment: 320
• Est. completion date: November 30, 2025
• Est. primary completion date: November 30, 2025
• Accepts healthy volunteers: No
• Gender: All
• Age group: 18 Years and older

Eligibility

Inclusion Criteria:

1. Signed Informed Consent according to national/local regulations.

2. Age =18 years.

3. Diagnosis of Acute Myeloid Leukemia (AML) or Myelodysplastic Syndrome in transformation (MDSit) treated with an intensive chemotherapy regimen, including induction / consolidation / salvage remission chemotherapy.

4. Planned hospital admission for the duration of the neutropenic phase (absolute neutrophils count <500 cells/mm3).

Exclusion Criteria:

1. Patients with neutropenia (absolute neutrophils count<500 cells/mm3) upon presentation and prior to chemotherapy initiation.

2. Patients with a diagnosis of acute promyelocytic leukemia (APL) or AML-M3.

3. Patients with known history of allergy, hypersensitivity or serious reaction to azole antifungals

4. Women who are pregnant (positive blood/urine pregnancy test within 10 days before randomization) or breast-feeding.

5. Diagnosis and treatment for an Invasive Fungal Infection (IFI) within 3 months prior to study enrolment and an Invasive Mold Infection (IMI) at any point prior to or at the time of enrolment.

6. Severe liver dysfunction, defined as at least one of the following markers: Aspartate Aminotransferase (AST), Alanine Aminotransferase (ALT) or alkaline phosphatase above >5x upper limit of normality: and/or total bilirubin above >3x upper limit of normality.

7. Patients with an ECG with a prolonged QTc interval: QTc greater than 450 msec for men and greater than 470 msec for women.

8. Patients who are receiving and cannot discontinue the following drugs at least 24 hours prior to randomization: terfenadine, astemizole, cisapride, pimozide, halofantrine or quinidine (because of the possibility of QT prolongation), sirolimus, rifampin, rifabutin, carbamazepine, long-acting barbiturates (e.g., phenobarbital, mephobarbital), ritonavir, efavirenz, or ergot alkaloids (e.g., ergotamine, dihydroergotamine).

9. Serious uncontrolled concomitant disease or comorbidity that, in the opinion of the investigator, may compromise adherence to the study protocol.

10. Receipt of a prior allogeneic Hematopoietic Cell Transplantation (HCT).

11. Previous exposure to mold-active prophylaxis (>48 hours within 7 days of inclusion).

Related Conditions & MeSH terms

• Acute Myeloid Leukemia
• Aspergillosis
• Candidiasis
• Fungal Infection
• Genetic Predisposition
• Genetic Predisposition to Disease
• Leukemia
• Leukemia, Myeloid
• Leukemia, Myeloid, Acute
• Mycoses

Intervention

Drug:
• Posaconazole
Posaconazole is a triazole with broad-spectrum activity, to include Candida species, Aspergillus species, and other fungal pathogens, including the Zygomycetes. Posaconazole is available as slow release tablets (300mg/day) and as intravenous (IV) formulation (300mg/day) and is licensed and approved in Switzerland for the prevention of IFI, including mold and yeast infections, in patients >18 years who are at high risk of developing these types of infection (patients with long-term neutropenia or HCT recipients). Furthermore, international guidelines recommend posaconazole for primary antifungal prophylaxis in high-risk patients, such as AML patients with prolonged neutropenia. Posaconazole is available in Switzerland under the name of Noxafil® in capsules of 100mg, suspension of 40mg/mL and intravenous formulation of 300mg/16.7 mL.
• Fluconazole
Fluconazole is an antifungal with activity against most Candida species. Fluconazole is licensed and approved in Switzerland for prophylaxis of IC in patients with neutropenia induced by chemotherapy or radiotherapy at a daily dose of 200 to 400 mg once daily. Fluconazole (200 mg or 400 mg once daily) is still currently used as primary antifungal prophylaxis (standard of care) in all 7 centers participating in this trial. Fluconazole is available in Switzerland under the name of Diflucan® in capsules of 50 mg, 150 mg and 200 mg and in powder for preparation of suspension (50 mg/5 ml and 200 mg/5 ml (forte)) or perfusion (2 mg/1 ml). Several generics of Diflucan® are authorized in Switzerland. Prescribing Diflucan® or any of its generics will remain at the discretion of and based on the standard operating procedures (SOP) at each institution.

Locations

Country	Name	City	State
Belgium	AZ Sint-Jan Hospital	Bruges
Belgium	Ghent University Hospital	Ghent
Belgium	University Hospital Leuven (UZ Leuven)	Leuven
France	Henri Mondor Hospital	Créteil	Ile De France
Switzerland	Cantonal Hospital Aarau	Aarau
Switzerland	University Hospital Basel	Basel
Switzerland	Cantonal Hospital HFR	Fribourg
Switzerland	University Hospital of Geneva (HUG)	Geneva
Switzerland	University Hospital of Lausanne / Centre Hospitalier Universitaire Vaudois (CHUV)	Lausanne	Vaud

Sponsors (2)

Lead Sponsor	Collaborator
Bochud Pierre-Yves	Swiss National Science Foundation

Countries where clinical trial is conducted

Belgium,  France,  Switzerland, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Cumulative incidence of proven and probable invasive mold infection (IMI)	The cumulative incidence of proven and probable invasive mold infection (IMI) (based on published consensus guidelines by the EORTC/MSG groups and after validation by an independent adjudication committee of infectious disease experts blinded to treatment arms) in the intention-to-treat (ITT) population by day 180.	Day 180
Secondary	Cumulative incidence of possible invasive mold infection (IMI)	The cumulative incidence of possible invasive mold infection (IMI) (based on published consensus guidelines by the EORTC/MSG groups and after validation by an independent adjudication committee of infectious disease experts blinded to treatment arms) by day 180 in the ITT population.	Day 180
Secondary	Cumulative incidence of probable and proven Invasive Fungal Infections (IFI)	The cumulative incidence of probable and proven Invasive Fungal Infections (IFI) (based on published consensus guidelines by the EORTC/MSG groups and after validation by an independent adjudication committee of infectious disease experts blinded to treatment arms), namely: (a) all IFI, (b) Invasive Aspergillosis (IA) only and (c) Invasive Candidiasis (IC) only in the ITT patient population by day 180.	Day 180
Secondary	Time to probable and proven invasive mold infection (IMI)	The time to probable and proven invasive mold infection (IMI) (based on published consensus guidelines by the EORTC/MSG groups and after validation by an independent adjudication committee of infectious disease experts blinded to treatment arms) during 180 days in the ITT population	Day 180
Secondary	Cumulative incidence of mortality	The cumulative incidence of mortality in the ITT population by day 180.	Day 180
Secondary	Time to use of amphotericin B/echinocandin	The time to use of amphotericin B/echinocandin in the ITT population during 180 days.	Day 180
Secondary	Number of patient-days of amphotericin B/echinocandin	The number of patient-days of amphotericin B/echinocandin in the ITT population during 180 days.	Day 180
Secondary	Frequency/distribution of adverse events (AE) of interest	The frequency/distribution of AE of interest in posaconazole and fluconazole treated participants in the ITT population during 180 days, namely: Hepatotoxicity, defined by elevation of at least one of the following markers above >5x upper limit of normal: transaminases, alkaline phosphatase and/or above >3x upper limit of normal total bilirubin; New QTc prolongation, defined as QTc >450 msec for men and >470 msec for women	Day 180
Secondary	Cumulative incidence of probable and proven invasive fungal infections (IFI) in per protocol population	The cumulative incidence of probable and proven invasive fungal infections (IFI) (based on published consensus guidelines by the EORTC/MSG groups and after validation by an independent adjudication committee of infectious disease experts blinded to treatment arms) , namely: all Invasive Fungal Infections (IFI), all Invasive Mold Infections (IMI), Invasive Aspergillosis (IA) only and Invasive Candidiasis (IC) only in the per protocol (PP) population by day 180.	Day 180