FHD-286 in Subjects With Advanced Hematologic Malignancies

• ClinicalTrials.gov Identifier: NCT04891757
• Recruitment Status: Suspended
• First Posted: May 18, 2021
• Last Update Posted: September 8, 2022
• Sponsor: Foghorn Therapeutics Inc.
• Information provided by (Responsible Party): Foghorn Therapeutics Inc.

Study Description

Brief Summary:

This Phase 1, multicenter, open-label, dose escalation study is designed to assess the safety, tolerability, pharmacokinetics (PK), pharmacodynamics (PD), and preliminary clinical activity of FHD-286 oral monotherapy in subjects with advanced hematologic malignancies, specifically relapsed or refractory (R/R) acute myeloid leukemia (AML) or R/R myelodysplastic syndromes (MDS).

Condition or disease	Intervention/treatment	Phase
Advanced Hematologic Malignancy; Relapsed Acute Myeloid Leukemia; Refractory Acute Myeloid Leukemia; Relapsed Myelodysplastic Syndromes; Refractory Myelodysplastic Syndromes	Drug: FHD-286	Phase 1

Detailed Description:

This study is an ascending multiple dose escalation clinical trial. It is primarily intended to evaluate the safety and tolerability of FHD-286 when administered orally to subjects with advanced hematologic malignancies, specifically R/R AML and R/R MDS. This dose escalation study will allow for the determination of the maximum tolerated dose (MTD) and/or the recommended phase 2 dose (RP2D) of FHD-286 in patients with advanced hematologic malignancies. This study will also evaluate the PK/PD profiles of multiple dose administration of FHD-286 and provide a preliminary assessment of antitumor activity in subjects with R/R AML and R/R MDS as well as other associated hematologic malignancies.

The data from this study in subjects with advanced hematologic malignancies, including safety, tolerability, PK/PD findings, and antitumor activity, will form the basis for subsequent clinical development of FHD-286.

Study Design

• Study Type: Interventional (Clinical Trial)
• Estimated Enrollment: 50 participants
• Allocation: N/A
• Intervention Model: Single Group Assignment
• Intervention Model Description: Open label single arm dose escalation in patients with advanced hematologic malignancies, specifically relapsed or refractory (R/R) acute myeloid leukemia (AML) or R/R myelodysplastic syndromes (MDS)
• Masking: None (Open Label)
• Primary Purpose: Treatment
• Official Title: A Phase 1, Multicenter, Open-Label, Dose Escalation Study to Assess the Safety, Tolerability, Pharmacokinetics, Pharmacodynamics, and Clinical Activity of Orally Administered FHD-286 in Subjects With Advanced Hematologic Malignancies
• Actual Study Start Date: June 14, 2021
• Estimated Primary Completion Date: September 2023
• Estimated Study Completion Date: June 2025

Arms and Interventions

Arm	Intervention/treatment
Experimental: FHD-286 dose escalation; Approximately 25-50 patients will be enrolled in the dose escalation arm.	Drug: FHD-286; FHD-286 as a single, orally administered agent.

Outcome Measures

Primary Outcome Measures :

1. Incidence of treatment-emergent adverse events (TEAEs) [ Time Frame: Up to 18 months ]
   Dose escalation
2. Incidence of adverse events (AEs), serious adverse events (SAEs) including changes in safety laboratory parameters and AEs leading to discontinuation [ Time Frame: Up to 18 months ]
   Dose escalation
3. Incidence of dose limiting toxicities (DLTs) during cycle 1 (28 days) [ Time Frame: Cycle 1 (cycle length = 28 days) ]
   Dose escalation

Secondary Outcome Measures :

1. AML: Complete remission (CR) rate [ Time Frame: Up to 18 months ]
   Bone marrow blasts < 5%; absence of blasts with Auer rods; absence of extramedullary disease; absolute neutrophil count > 1.0 × 109/L (1000/μL); platelet count > 100 × 109/L (100,000/μL); independence of red cell transfusions
2. AML: Duration of CR [ Time Frame: Up 18 months ]
   Time from first documented evidence of CR until the earliest date of documented progression or death due to any cause
3. AML: CR + CR with partial hematologic recovery (CRh) rate [ Time Frame: Up 18 months ]

   CR as described above

   For documentation of CRh, FDA has used the following definition:

   • Marrow blasts < 5% by morphological examination
   • ANC > 0.5 Gi/L (>0.5 × 109/L (500/μL); and platelet count > 50 Gi/L ( >50 × 109/L (50,000/μL), but the count recovery criteria for CR are not met
   • Absence of leukemic blasts in the peripheral blood by morphological examination
   • No evidence of extramedullary disease
4. AML: Duration of CR + CRh [ Time Frame: Up 18 months ]
   Time from first documented evidence of CR + CRh until the earliest date of documented progression or death due to any cause
5. AML: Transfusion independence rate [ Time Frame: Up 18 months ]
   The absence of red blood cell and platelet transfusions for 28 days during continued treatment. For patients with active AML, transfusion dependence at baseline is based on the receipt of any red blood cell or platelet transfusions within at least 28 days prior to the start of study treatment
6. AML: Event free survival (EFS) [ Time Frame: Up 42 months ]
   Time from first dose of study treatment until the first date of documented relapse (excluding relapse after partial response), treatment failure or death, whichever comes first
7. AML: Overall survival (OS) [ Time Frame: Up to 42 months ]
   Time from first dose of study treatment to the date of death due to any cause
8. MDS: CR rate [ Time Frame: Up to 18 months ]
   • Bone marrow: ≤ 5% myeloblasts with normal maturation of all cell lines
   • Persistent dysplasia will be noted
   • Hgb ≥ 11 g/dL
   • Platelets ≥ 100 × 109/L
   • Neutrophils ≥ 1.0 × 109/L
   • Blasts = 0%
9. MDS: Duration of CR [ Time Frame: Up to 18 months ]
   Time from first documented evidence of CR until the earliest date of documented progression or death due to any cause
10. MDS: Partial remission (PR) rate [ Time Frame: Up to 18 months ]

    All CR criteria if abnormal before treatment except:

    • Bone marrow blasts decreased by ≥50% over pretreatment but still > 5%
    • Cellularity and morphology not relevant
11. MDS: Duration of PR [ Time Frame: Up to 18 months ]
    Time from first documented evidence of PR until the earliest date of documented progression or death due to any cause
12. MDS: CR + PR [ Time Frame: Up to 18 months ]
    CR as described above; PR as described above
13. MDS: Duration of CR + PR [ Time Frame: Up to 18 months ]
    Time from first documented evidence of CR + PR until the earliest date of documented progression or death due to any cause
14. MDS: Hematologic Improvement (HI) rate [ Time Frame: Up to 18 months ]

    Erythroid response (pretreatment, < 11 g/dL):

    • Hgb increase by ≥ 1.5 g/dL
    • Relevant reduction of units of RBC transfusions by an absolute number of at least 4 RBC transfusions/8 wk compared with the pretreatment transfusion number in the previous 8 wk. Only RBC transfusions given for a Hgb of ≤ 9.0 g/dL pretreatment will count in the RBC transfusion response evaluation

    Platelet response (pretreatment, < 100 × 109/L):

    • Absolute increase of ≥ 30 × 109/L for subjects starting with > 20 × 109/L platelets
    • Increase from < 20 × 109/L to > 20 × 109/L and by at least 100%

    Neutrophil response (pretreatment, < 1.0 × 109/L):

    • At least 100% increase and an absolute increase > 0.5 × 109/L

    Response must last up to 8 weeks

15. MDS: EFS [ Time Frame: Up to 42 months ]
    Time from first dose of study treatment until the first date of documented relapse (excluding relapse after partial response), treatment failure or death, whichever comes first
16. MDS: OS [ Time Frame: Up to 42 months ]
    Time from first dose of study treatment to the date of death due to any cause
17. PK parameter: Area under the plasma concentration time curve (AUC) [ Time Frame: Day 1 and day 8 of cycle 1 (each cycle is 28 days) ]
    Characterization of the PK profile of FHD-286
18. Plasma concentration vs. time profiles [ Time Frame: Day 1 and day 8 of cycle 1 (each cycle is 28 days) ]
    Plasma concentrations of FHD-286 at the scheduled timepoints

Eligibility Criteria

• Ages Eligible for Study: 18 Years and older (Adult, Older Adult)
• Sexes Eligible for Study: All
• Accepts Healthy Volunteers: No

Criteria

Inclusion Criteria:

1. Subject must be ≥ 18 years of age.

2. Subject must have a confirmed diagnosis of an advanced hematologic malignancy, specified as follows:

   • R/R AML (subjects who relapse after transplantation; subjects in second or later relapse; subjects who are refractory to initial induction or reinduction treatment; subjects who relapse within 1 year of initial treatment). Subjects with AML must have previously failed all prior therapies known to be active for treatment of their diagnosed hematologic disease.
   • R/R MDS. Subjects with MDS must have previously failed treatment with at least 4 cycles of a hypomethylating agent, known to be active for treatment of their diagnosed hematologic disease.
3. Subject must be able to understand and be willing to sign an informed consent.
4. Subject must be willing and able to comply with scheduled study visits and treatment plans.
5. Subject must be willing to undergo all study procedures (fresh bone marrow biopsy and/or aspirate at baseline within 28 days of first dose plus bone marrow evaluations every 4 weeks for the first 24 weeks, then every 8 weeks for the next 48 weeks of treatment, as clinically indicated thereafter, and 1 EOT bone marrow evaluation (unless contraindicated due to medical risk; other exceptions to this are at the discretion of the Sponsor's Medical Monitor), peripheral blood and tissue sampling, and urine sampling during the study.
6. Subject must have an ECOG PS of ≤ 2.
7. Subject must have a life expectancy of ≥ 3 months.

8. Subject must have adequate hepatic function as evidenced by:

   • Serum total bilirubin ≤ 1.5 × upper limit of normal (ULN), unless considered due to leukemic involvement following approval by the study Sponsor Aspartate aminotransferase (AST), alanine aminotransferase (ALT), and alkaline phosphatase (ALP) ≤ 3.0 × ULN, unless considered due to leukemic involvement following approval by the study Sponsor
   • Prothrombin time (PT) ≤ 1.5 × ULN or international normalized ratio (INR) ≤ 1.4
   • Activated partial thromboplastin time (aPTT) ≤ ULN
   • No known portal vein thrombosis

9. Subject must have adequate renal function as evidenced by:

   • Creatinine clearance > 60 mL/min based on the Cockcroft-Gault glomerular filtration rate (GFR) estimation

10. Subject must have an adequate platelet level, defined as:

    • Platelets > 50 × 109/L (transfusions to achieve this level are allowed.) Subjects with a baseline platelet count of ≤ 50 × 109/L due to underlying malignancy are eligible with Medical Monitor approval.

11. Subject must have adequate cardiovascular, respiratory, and immune system function as evidenced by the below criteria and in the opinion of the Investigator:

    • LVEF of ≥ 40% by ECHO

12. Subjects must agree to discontinue intake of beverages, herbal supplements, or food known to inhibit or induce cytochrome P450 (CYP) 3A such as grapefruit juice, St John's wort, echinacea, and goldenseal from 72 hours before admission until 72 hours following final dose of study drug.

13. Timing requirements with respect to prior therapy and surgery are as follows:

    • 2 weeks and/or at least 5 half-lives, whichever is shorter, must have elapsed since administration of the last dose of any prior systemic anticancer therapy. Hydroxyurea is allowed prior to enrollment and after the start of FHD-286 for the control of peripheral leukemic blasts in subjects with leukocytosis (eg, white blood cell [WBC] counts > 30 × 109/L) with approval of the Medical Monitor. (Patients must either be intolerant to and/or have experienced disease progression on their prior therapy in the opinion of the treating physician.)
    • 4 weeks must have elapsed since the last dose of post-transplant calcineurin inhibitors.
    • 4 weeks must have elapsed since the last major surgery, 2 weeks for minor surgery (eg, port placement).
    • 2 weeks must have elapsed since the last radiotherapy. Exceptions may be made in the case of palliative radiotherapy at the discretion of the Medical Monitor.
14. Toxicity related to prior therapy must have returned to ≤ Grade 2 by CTCAE at least 14 days prior to study start or be deemed irreversible by the Investigator. Exceptions include alopecia, neuropathy, appropriately controlled endocrine toxicities, and other toxicities similar to these with discussion with the Medical Monitor.

15. Female subjects must be:

    • postmenopausal, defined as at least 12 months post cessation of menses (without an alternative medical cause), or
    • permanently sterile following documented hysterectomy, bilateral salpingectomy, bilateral oophorectomy, or tubal ligation or having a male partner with vasectomy as affirmed by the subject, or
    • nonpregnant, nonlactating, and if sexually active having agreed to use a highly effective method of contraception (ie, hormonal contraceptives associated with inhibition of ovulation or intrauterine device [IUD], or intrauterine hormone-releasing system [IUS], or sexual abstinence) from Screening Visit until 90 days after the final dose of the study drug.

    Note: The potential risk to female fertility posed by FHD-286 is unknown; it is recommended that subjects discuss options for fertility preservation with their doctor prior to study start.

16. Male subjects must have documented vasectomy or if sexually active must agree to use a highly effective method of contraception with their partners of childbearing potential (ie, hormonal contraceptives associated with the inhibition of ovulation or IUD, or IUS, or sexual abstinence) from Screening until 90 days after the final dose of the study drug. Male subjects must agree to refrain from donating sperm during this time period.

Note: The potential risk to male fertility posed by FHD-286 is unknown; it is recommended that subjects discuss options for fertility preservation with their doctor prior to study start.

Exclusion Criteria:

1. Subject is unable to provide informed consent and/or to follow protocol requirements.
2. Subject has undergone HSCT within 60 days of the first dose of FHD-286, or subject is on immunosuppressive therapy post-HSCT at the time of screening, or subject has clinically significant graft-versus-host disease (GVHD). The use of a stable dose of oral steroids post-HSCT is permitted with Medical Monitor approval.
3. Subject has clinical symptoms suggesting active central nervous system (CNS) leukemia or known CNS leukemia. Evaluation of the cerebrospinal fluid is only required if there is a clinical suspicion of CNS involvement by leukemia during screening.
4. Subject has an immediately life-threatening, severe complications of leukemia, such as uncontrolled bleeding, pneumonia with hypoxia or shock, and/or disseminated intravascular coagulation.
5. Subject has other malignancy which may interfere with the diagnosis and/or treatment of advanced hematologic malignancies.
6. Subject has active hepatitis B virus (HBV) or hepatitis C virus (HCV) infections; subjects with a sustained viral response to HCV treatment or immunity to prior HBV infection will be permitted. Subject has known positive human immunodeficiency virus (HIV)antibody results, or acquired immunodeficiency syndrome (AIDS)-related illness; subjects with CD4+ T-cell counts ≥ 350 cells/μL will be permitted as will subjects who have not had an AIDS-related illness within the past 12 months.
7. Subject has an active severe infection that requires anti-infective therapy or has an unexplained temperature of > 38.5°C during screening visits or on their first day of study drug administration (at the discretion of the Investigator, subjects with tumor fever may be enrolled).
8. Subject has an uncontrolled intercurrent illness.
9. Subjects with corrected QT interval (QTc) using Fridericia's formula (QTcF) > 470 msecs or other factors that increase the risk of QTc prolongation or arrhythmic events (eg, heart failure, hypokalemia, family history of long QT interval syndrome) including heart failure that meets New York Heart Association (NYHA) class III and IV definitions are excluded.
10. Subject has any other medical or psychological condition, deemed by the Investigator to be likely to interfere with a subject's ability to sign informed consent, cooperate, or participate in the study.
11. Subject has known allergies or hypersensitivities to components of the FHD-286 formulation.
12. Subject is unable to tolerate the administration of oral medication or has GI dysfunction that could interfere with absorption of FHD-286 (eg, ulcerative disease, uncontrolled nausea, vomiting, diarrhea, malabsorption syndrome, partial bowel resections).
13. Subject is receiving any other investigational agents.
14. Subject has participated in any other clinical trials within 2 weeks or at least 5 half-lives of a prior investigational drug at the start of study treatment. Exceptions include participation in any observational or nontherapeutic clinical trials.
15. Subject is on medications that are strong CYP3A inhibitors, are strong CYP3A inducers, or are sensitive CYP3A substrates with narrow TIs. Exceptions may be made for therapy in the case of life-threatening infections, for example a triazole anti-fungal agent to reduce the risk of invasive fungal infections, at the discretion of the Medical Monitor.
16. Subject is on medications with narrow TIs that are sensitive P-gp or breast cancer BCRP substrates and are administered orally, such as digoxin or on medications that are strong inhibitors of P-gp or BCRP.
17. Subject on medications that are acid-reducing agents (ARA) such as histamine H2-receptor antagonists (H2 blockers), and proton pump inhibitors (PPIs). The last dose of PPIs must be administered 7 days prior to administration of study drug. Antacids are acceptable when administered in a staggered dosing manner with FHD-286.
18. Subject is receiving systemic steroid therapy or any other systemic immunosuppressive medication. The use of a stable dose of oral steroids post-HSCT is permitted with Medical Monitor approval. Local steroid therapies (inhaled or topical steroids) are acceptable. Appropriate steroid replacement to manage endocrine toxicities resulting from prior anticancer systemic therapy is permitted.
19. Subject has undergone any prior treatment with a BRG1/BRM inhibitor.
20. Subject is pregnant or breastfeeding or is planning to become pregnant within 1 year of study start. Subject is a woman or man of childbearing capabilities who is unwilling to use effective contraception.

Contacts and Locations

Locations

United States, Massachusetts

Massachusetts General Hospital

Boston, Massachusetts, United States, 02114

Dana Farber Cancer Institute

Boston, Massachusetts, United States, 02215

United States, New York

Memorial Sloan Kettering Cancer Center

New York, New York, United States, 10065

United States, Tennessee

Vanderbilt University Medical Center

Nashville, Tennessee, United States, 37232

United States, Texas

MD Anderson Cancer Center

Houston, Texas, United States, 77030

Sponsors and Collaborators

Foghorn Therapeutics Inc.

Investigators

• Study Director: Sarah Reilly, MD; Foghorn Therapeutics

More Information

• Responsible Party: Foghorn Therapeutics Inc.
• ClinicalTrials.gov Identifier: NCT04891757
• Other Study ID Numbers: FHD-286-C-002
• First Posted: May 18, 2021
• Last Update Posted: September 8, 2022
• Last Verified: September 2022

• Studies a U.S. FDA-regulated Drug Product: Yes
• Studies a U.S. FDA-regulated Device Product: No

Keywords provided by Foghorn Therapeutics Inc.:

AML; Relapsed Acute Myeloid Leukemia; Refractory Acute Myeloid Leukemia; MDS; Relapsed Myelodysplastic Syndromes; Refractory Myelodysplastic Syndromes; Phase 1; FHD-286; Foghorn

Additional relevant MeSH terms:

Leukemia; Leukemia, Myeloid; Leukemia, Myeloid, Acute; Neoplasms; Preleukemia; Hematologic Neoplasms; Myelodysplastic Syndromes; Syndrome; Disease; Pathologic Processes; Neoplasms by Histologic Type; Bone Marrow Diseases; Hematologic Diseases; Precancerous Conditions; Neoplasms by Site