Overview
This is a Phase Ib/II, open-label, multi-center study evaluating the safety, tolerability, efficacy and PK of APG-2575 in combination with Azacitidine in the patients with AML/MPAL or MDS/CMML. The study consists of dose escalation (Part I) and dose expansion phase (Part II)
Description
The patients with histologically confirmed relapsed or refractory (R/R) AML/MPAL/CMML or relapsed/refractory Higher-Risk MDS by WHO classification for which no available standard therapies are indicated or anticipated to result in a durable response will be enrolled.
This will be a 3+3 dose escalation to determine the DLTs and MTD/RP2D of APG-2575 (see dose escalation table) given in combination with Azacitidine
Eligibility
Inclusion Criteria:
Patients with a diagnosis of histologically confirmed relapsed or refractory (R/R) acute
myeloid leukemia (AML) or mixed phenotype acute leukemia (MPAL) or Chronic Myelomonocytic
Leukemia (CMML) or relapsed/refractory Higher-Risk MDS by 2016 WHO classification for which
no available standard therapies are indicated or anticipated to result in a durable
response.
- MPAL will include biphenotypic leukemia, bilineal leukemia, undifferentiated leukemia,
mixed lineage leukemia, leukemia of ambiguous lineage, T/myeloid leukemia, B/myeloid
leukemia, or other diagnosis indicating the presence of multiple lineages within the
cell population.
- Relapsed/refractory MDS will be defined as prior receipt of 4 cycles of HMA therapy
with failure to attain a response, or progression of disease or relapse at any time
after prior response to HMA therapy with Overall Revised International Prognostic
Scoring System (IPSS-R) score > 3 (intermediate, high or very high).
Exclusion Criteria:
1. Pregnant women.
2. Uncontrolled intercurrent illness including, but not limited to active uncontrolled
infection, symptomatic congestive heart failure (NYHA Class III or IV), unstable
angina pectoris, clinically significant cardiac arrhythmia, or psychiatric
illness/social situations that would limit compliance with study requirements.
3. Have had leukemia therapy within 14 days prior to starting investigational drug.
However, patients with rapidly proliferative disease may receive hydroxyurea as needed
until 24 hours prior to starting therapy on this protocol and during the first cycle
of study.
4. Have taken strong inhibitors or inducers of CYP3A4 within 7 days prior to the first
dose of APG-2575.
5. Have acute promyelocytic leukemia (French-American-British Class M3 AML or WHO
classification APL with PML-RARA) or AML/MPAL with BCR-ABL1 positive.
6. Active infection requiring systemic antibiotic/antifungal medication, known clinically
active hepatitis B or C, or HIV infection or active COVID-19. (Patients who have
received COVID-19 vaccination will be considered as eligible for the study.)
7. Have active/ongoing graft-versus host disease (GVHD) or require continued treatment
with systemic immunosuppressive agents (calcineurin inhibitors within 4 weeks prior to
the first dose).
8. Myeloablative therapy with autologous or allogeneic hematopoietic stem cell rescue
within 6 months of study treatment initiation.
9. Documented hypersensitivity to any of the components of the therapy program.
10. Active, uncontrolled CNS leukemia.
11. Men and women of childbearing potential who do not practice contraception. Women of
childbearing potential and men must agree to use at least 1 form of barrier birth
control (such as condom) prior to study entry and for the duration of study
participation.
12. History of other malignancies within 2 years prior to study entry, with the exception
of:
- Adequately treated in situ carcinoma of the cervix uteri or carcinoma in situ of
breast.
- Basal cell carcinoma of the skin or localized squamous cell carcinoma of the
skin.
- Previous malignancy confined and surgically resected (or treated with other
modalities) with curative intention requires discussion with sponsor.
13. Failure to have recovered (Grade > 1) from prior treatment (including chemotherapy,
targeted therapy, immunotherapy, experimental agents, radiation, or surgery), except
for alopecia.
14. Unable to swallow tablets or malabsorption syndrome, disease significantly affecting
gastrointestinal function, or resection of the stomach or small bowel, symptomatic
inflammatory bowel disease or ulcerative colitis, or partial or complete bowel
obstruction.
15. Significant screening electrocardiogram (ECG) abnormalities including left bundle
branch block, 2nd degree atrioventricular (AV) block type II, 3rd degree block, or
corrected QT interval (QTc) ≥470 msec.
16. Any other condition or circumstance that would, in the opinion of the investigator,
make the patient unsuitable for participation in the study.