A Study of DT2216 in Relapsed/Refractory Malignancies

NCT ID: NCT04886622

Last Updated: 2025-04-16

Basic Information

• Recruitment Status: COMPLETED
• Clinical Phase: PHASE1
• Total Enrollment: 20 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2021-08-25
• Study Completion Date: 2024-06-30

Brief Summary

A Phase 1, Open-Label, Dose Escalation, and Cohort Expansion Study to Evaluate the Safety, Tolerability, Pharmacokinetics (PK) and Clinical Activity of DT2216, an Antiapoptotic Protein Targeted Degradation Compound, in Subjects with Relapsed or Refractory Malignancies

Detailed Description

This study is an open-label, first-in-human, dose escalation study in subjects with histologically or cytologically confirmed advanced or metastatic malignancies who are no longer responsive to approved or accepted standard-of-care interventions. The study will consist of a dose escalation phase followed by confirmation of the recommended phase 2 dose (RP2D).

Potentially eligible subjects will undergo screening evaluations (up to 28 days prior to study therapy) and those who meet all protocol-defined eligibility criteria will be enrolled into the study. Subjects who fail screening may be re-screened one time following correction or mitigation of the condition that caused the screen failure; there is no time limit on when a subject may be re-screened. Enrolled subjects will receive a single intravenous (IV) infusion of study drug on Days 1 and 4 weekly for at least 4 weeks, with each cycle consisting of 28 days. Treatment duration for an individual subject may continue for a maximum of 1 year, until disease progression, unacceptable toxicity, subject withdrawal, Investigator's decision for a change in treatment strategy for the individual subject, or death. Longer therapy may be considered for individual subjects upon consultation with the Sponsor's Medical Monitor and overall assessment of benefit:risk. Subjects will be followed for safety for 28 days following the administration of the last study treatment.

Conditions

Solid Tumor; Hematologic Malignancy

Study Design

• Allocation Method: NA
• Intervention Model: SEQUENTIAL
• Primary Study Purpose: TREATMENT
• Blinding Strategy: NONE

Study Groups

DT2216

DT2216 will be administered by intravenous infusion over 30 minutes twice weekly on a continuous basis. Each treatment cycle will be 28 days in duration. The starting dose of DT2216 will be 0.04 mg/kg and will escalate by 100% increments for the first 5 treatment groups. Thereafter, if additional dose escalations are required, escalation will follow a modified Fibonacci scheme. Treatment may continue for up to 1 year.

Group Type: EXPERIMENTAL

DT2216

Intervention Type: DRUG

DT2216 will be administered by intravenous infusion

Interventions

DT2216

DT2216 will be administered by intravenous infusion

Intervention Type: DRUG

Eligibility Criteria

Inclusion Criteria

1. Adults aged 18 years or older on the day of signing informed consent.

2. Provide written informed consent for the trial, including willingness to comply with all study related requirements.

3. Histologically or cytologically confirmed solid tumor. Subjects with more than 1 primary malignancy may be considered upon review with the Sponsor's Medical Monitor

4. Evidence of disease progression or inadequate response on the last regimen as assessed by the Investigator.

5. Has exhausted all curative options or has a contraindication to approved therapies or generally recognized standard-of-care measures for the subject's cancer.

6. Presence of measurable disease as assessed by the Investigator per Response Evaluation Criteria in Solid Tumors (RECIST) 1.1

7. Have Eastern Cooperative Oncology Group (ECOG) performance status of 0 or 1

8. Has adequate organ functions as defined by the following laboratory parameters at baseline (laboratory parameters outside of these ranges that are deemed clinically insignificant should be discussed with the Medical Monitor): (a) Absolute neutrophil count ≥1.5 x 109/L; (b) hemoglobin ≥9 g/dL; (c) platelet count ≥100,000/mm3; (d) aspartate aminotransferase (AST) and alanine aminotransferase (ALT) ≤2.5 x upper limit of normal (ULN); (e) total bilirubin ≤ 1.5 x institutional ULN (exception: subjects with known Gilbert's syndrome and total bilirubin ≤3.0 x ULN at screening or anytime during the prior 6 months are eligible); (f) c) adequate renal function defined as calculated creatinine clearance >60 mL/min using the Cockcroft-Gault Method (Appendix 3); (g) acceptable coagulation parameters including international normalized ratio (INR) <1.5 and partial thromboplastin time (PTT) ≤ institutional ULN; (h) serum albumin ≥3.0 g/dL.

9. Left ventricular ejection fraction of ≥50% as assessed by echocardiogram or multi-gated acquisition (MUGA) scan.

10. Adequate washout from the following prior to first dose of study therapy: Palliative radiation ≥ 2 weeks; chemotherapy or targeted therapy ≥ 3 weeks or 5 half-lives; biologic therapy ≥ 4 weeks.

11. Resolution to Grade ≤1 by the National Cancer Institute CTCAE, Version 5.0 (NCI-CTCAE v 5.0) of all clinically significant toxic effects of prior therapies.

12. Female subjects: A female subject is eligible to participate if she is not pregnant, not breastfeeding, and at least one of the following conditions applies: (a) Not a woman of childbearing potential (WOCBP); (b) WOCBP who agrees to follow the contraceptive guidance during the study treatment period and for at least 120 days after the last dose of study treatment.

13. Female subject of childbearing potential must have a negative urine or serum pregnancy test within 72 hours prior to receiving any dose of study medication. If the urine test is positive or cannot be confirmed as negative, a serum pregnancy test will be required.

14. Male subject is eligible to participate if he agrees to follow the acceptable contraceptive guidance during the study treatment period and for at least 120 days after the last dose of study treatment.

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1. Adults aged 18 years or older on the day of signing informed consent.

2. Provide written informed consent for the trial, including willingness to comply with all study related requirements.

3. Histologically or cytologically confirmed solid tumor. Subjects with more than 1 primary malignancy may be considered upon review with the Sponsor's Medical Monitor.

4. Evidence of disease progression or inadequate response on the last regimen as assessed by the Investigator.

5. Has exhausted all curative options or has a contraindication to approved therapies or generally recognized standard-of-care measures for the subject's cancer.

6. Presence of measurable disease as assessed by the Investigator per Response Evaluation Criteria in Solid Tumors (RECIST) 1.1

7. Have Eastern Cooperative Oncology Group (ECOG) performance status of 0 or 1

8. Has adequate organ functions as defined by the following laboratory parameters at baseline (laboratory parameters outside of these ranges that are deemed clinically insignificant should be discussed with the Medical Monitor): (a) Absolute neutrophil count ≥1.5 x 109/L; (b) hemoglobin ≥9 g/dL; (c) platelet count ≥100,000/mm3; (d) aspartate aminotransferase (AST) and alanine aminotransferase (ALT) ≤2.5 x upper limit of normal (ULN); (e) total bilirubin ≤ 1.5 x institutional ULN (exception: subjects with known Gilbert's syndrome and total bilirubin ≤3.0 x ULN at screening or anytime during the prior 6 months are eligible); (f) c) adequate renal function defined as calculated creatinine clearance >60 mL/min using the Cockcroft-Gault Method (Appendix 3); (g) acceptable coagulation parameters including international normalized ratio (INR) <1.5 and partial thromboplastin time (PTT) ≤ institutional ULN; (h) serum albumin ≥3.0 g/dL.

9. Left ventricular ejection fraction of ≥50% as assessed by echocardiogram or MUGA scan.

10. Adequate washout from the following prior to first dose of study therapy: Palliative radiation ≥ 2 weeks; chemotherapy or targeted therapy ≥ 3 weeks or 5 half-lives; biologic therapy ≥ 4 weeks.

11. Resolution to Grade ≤1 by the National Cancer Institute CTCAE, Version 5.0 (NCI-CTCAE v 5.0) of all clinically significant toxic effects of prior therapies.

12. Female subjects: A female subject is eligible to participate if she is not pregnant, not breastfeeding, and at least one of the following conditions applies: (a) Not a woman of childbearing potential (WOCBP); (b) WOCBP who agrees to follow the contraceptive guidance during the study treatment period and for at least 120 days after the last dose of study treatment.

13. Female subject of childbearing potential must have a negative urine or serum pregnancy test within 72 hours prior to receiving any dose of study medication. If the urine test is positive or cannot be confirmed as negative, a serum pregnancy test will be required.

14. Male subject is eligible to participate if he agrees to follow the acceptable contraceptive guidance during the study treatment period and for at least 120 days after the last dose of study treatment.

Exclusion Criteria

Diagnosis and Main Criteria for Inclusion:

Subjects are eligible to be included in the study only if all of the following criteria are met:

1. Received any BCL-XL directed therapy.

2. Administration of any blood products within the 30 days preceding the planned administration of study therapy.

3. History of clinically significant bleeding and/or bleeding predisposition.

4. Significant liver insufficiency defined as Child-Pugh Class B or C

5. Concurrent administration of medications or foods that are strong inhibitors or inducers of cytochrome P450 3A (CYP3A). Strong CYP3A inhibitors and inducers should be discontinued at least 2 weeks prior to the first dose of DT2216 (Appendix 5).

6. Known active central nervous system (CNS) metastases/and or carcinomatous meningitis. Subjects with previously treated brain metastases may participate provided they are stable without evidence of progression via imaging for at least 4 weeks prior to first dose of study therapy, are not receiving pharmacologic doses of glucocorticoids and are without evidence of neurological symptoms. Carcinomatous meningitis is excluded regardless of clinical stability.

7. Requiring anticoagulation for any reason (subjects who are on anticoagulants during the screening period and are candidates for discontinuation can be considered).

8. Prior organ transplantation including allogeneic or autologous stem-cell transplantation or other cellular therapies (e.g. chimeric antigen receptor T-cells [CAR-T]).

9. Major surgery <4 weeks prior to first dose of study therapy.

10. Growth factor use <4 weeks prior to first dose of study therapy.

11. Participation in another research study involving receipt of an investigational product <4 weeks prior to first dose of study therapy. If the half-life of the investigational study is known, a shorter interval may be appropriate and should be discussed with the Sponsor's Medical Monitor. Participants who have entered the follow-up phase of an investigational study may be eligible as long as it has been 4 weeks after the last dose of the previous investigational agent.

12. Active autoimmune disease or history of chronic recurrent autoimmune disease, requiring systemic treatment for the past 2 years (i.e. disease modifying agents, corticosteroids or immunosuppressive drugs). Hormone replacement therapy (thyroxine, insulin, or physiological corticosteroid replacement for either adrenal or pituitary insufficiency) is not considered a form of systemic treatment directed at an autoimmune disorder.

13. Systemic steroid therapy (>10 mg daily prednisone or equivalent) or any other form of immunosuppressive therapy within 7 days prior to the first dose of study treatment (note: topical, inhaled, nasal and ophthalmic steroids are permitted).

14. Known active hepatitis B (e.g, HBsAg reactive), hepatitis C (HCV) (e.g., HCV RNA [qualitative] is detected). Subjects who have completed a course of anti-viral therapy for hepatitis C and are polymerase chain reaction (PCR) negative are eligible.

15. Active infection with human immunodeficiency virus (HIV) unless: (a) Subject is currently off antiretroviral therapy (ART) for at least 4 weeks; (b) HIV viral load of < 400 copies per milliliter (/mL) at Screening (or undetectable per local criteria); (c) cluster of differentiation (CD4) counts ≥200/microliter

16. Active infection requiring systemic therapy.

17. Known allergy to any component of the study treatment formulation(s).

18. Known history of marked prolongation of the QT or QT corrected (QT /QTc) interval or a mean QTc as assessed by Fridericia's method (QTcF) value >470 msec following 3 ECG determinations 5 minutes apart at Screening.

19. History of additional risk factors for Torsade de Pointes (including heart failure, hypokalemia, family history of Long QT Syndrome, and use of concomitant medications that prolong the QT/QTc interval.

20. Pregnant or breastfeeding or expecting to conceive or father children within the projected duration of the trial, starting with the pre-screening or screening visit through 120 days after the last dose of study treatment.

21. Clinically significant cardiovascular disease including: History of myocardial infarction within 6 months prior to day 1 of study therapy, symptomatic congestive heart failure (New York Heart Association Class II to IV), unstable angina, or serious cardiac arrhythmia requiring treatment, uncontrolled angina within 3 months of day 1 of study therapy, uncontrolled hypertension.

22. Corona Virus Disease (COVID-19) diagnosis within 3 months of first dose of study drug.

23. Any other history of clinically significant and ongoing chronic respiratory disease, gastrointestinal disease, liver disease, renal disease, endocrine disorder or any other medical or psychiatric condition that in the opinion of the Investigator will significantly increase the safety risk for the subject or confound the interpretation of the study data.

24. History of alcohol or drug abuse within 6 months of first dose of study therapy or a social situation that would interfere with the subject's participation in the trial.

25. In the opinion of the Investigator, participant has rapidly progressing disease, OR has life expectancy <3 months.

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• Minimum Eligible Age: 18 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: No

Sponsors

Dialectic Therapeutics, Inc

INDUSTRY

Sponsor Role: lead

Responsible Party

Responsibility Role: SPONSOR

Principal Investigators

Michael Kurman, MD

Role: STUDY_DIRECTOR

Dialectic Therapeutics

Locations

Northwestern University

Chicago, Illinois, United States

Mary Crowley Cancer Research

Dallas, Texas, United States

Mays Cancer Center

San Antonio, Texas, United States

Countries

United States

References

Khan S, Zhang X, Lv D, Zhang Q, He Y, Zhang P, Liu X, Thummuri D, Yuan Y, Wiegand JS, Pei J, Zhang W, Sharma A, McCurdy CR, Kuruvilla VM, Baran N, Ferrando AA, Kim YM, Rogojina A, Houghton PJ, Huang G, Hromas R, Konopleva M, Zheng G, Zhou D. A selective BCL-XL PROTAC degrader achieves safe and potent antitumor activity. Nat Med. 2019 Dec;25(12):1938-1947. doi: 10.1038/s41591-019-0668-z. Epub 2019 Dec 2.

Reference Type: BACKGROUND

PMID: 31792461 (View on PubMed)

Other Identifiers

DT2216-001

Identifier Type: -

Identifier Source: org_study_id