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APG-115

Phase 2

T-Prolymphocytic Leukemia | Small molecule | Oncology |Ascentage Pharma Group International - American Depository Shares|Last Updated: Aug 21, 2026

Target and mechanism

Molecular targetMDM2-p53
Target classInhibitor
ModalitySmall molecule

Success Probability

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Market & Valuation

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Trial Design

CONTROLLED
Total Trials1
Total Enrollment78

FDA Designations

No designations recorded

Clinical trial landscape

APG-115 · 5 trials · 9 indications

Phase 2 1Phase 1 4
NCT04496349A Study Evaluating APG-115 as a Single Agent or in Combination With APG-2575 in Subjects With R/R T-PLL and NHLT-Prolymphocytic Leukemia
RECRUITING78 Analytics
PHASE2RECRUITING
A Study Evaluating APG-115 as a Single Agent or in Combination With APG-2575 in Subjects With R/R T-PLL and NHL
T-Prolymphocytic LeukemiaUnlock trial analytics

Study Endpoints

Primary Endpoints

Maximum tolerated dose of APG-115
21 days

To evaluate the safety of APG-115 as a single agent

Maximum tolerated dose of APG-115+APG-2575
21 days

To evaluate the maximum tolerated dose of APG-115 and APG-2575 in combination

Dose Limiting Toxicity (Phase I)
Up to 21 days

DLT will be defined based on the rate of drug-related grade 3-5 adverse events experienced within the first 3 weeks of study treatment. These will be assessed via CTCAE version 5.0.

Treatment-Emergent Adverse Events per NCI-CTCAE version 5.0
Up to 12 months

Number of patients with adverse event; Number of patients with abnormal vital signs, abnorma physical examination, laboratory abnormalities, and abnormal 12-lead ECG in monotherapy of APG-115 and combined with APG-2575.

Recommended Phase II Dose
21 days

Phase I is aimed to generate data to select the recommended Phase II dose.

Overall Response Rate (Phase II)
up to 12 months

Phase II is to assess overall response rate of APG-115 in combination with toripalimab defined as the percentage of subjects with a best overall confirmed CR or a PR at any time as per RECIST v1.1.

Dose Limiting Toxicities (DLT)
From day 1 to the end of cycle 1 (each cycle is 28 days).

DLT will be graded according to the NCI Common Terminology Criteria for Adverse Events (CTCAE, version 5) by organ system. DLT will be defined as clinically significant drug-related adverse events during the Cycle one.

Maximum Tolerated Dose (MTD)
28 days

Patients with APG-115 treatment related adverse events (AE), serious adverse events (SAE) will be assessed according NCI CTCAE Version 4.0

Secondary Endpoints

Overall Response Rate (ORR)
Evaluated for response by the end of cycle 1 and cycle 2, and then 2 months thereafter till complete 6 cycles treatment or 1 month after last dose (each cycle is 28 days).
Overall survival (OS)
Measured up to 6 months after the last subject has received treatment.
Response will be evaluated every 2 cycles (8 weeks), according to the revised RECIST Guideline, Version 1.1
18-24 months
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Study Design & Arms

AllocationNON_RANDOMIZED
MaskingNONE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
APG-115 monotherapy partEXPERIMENTALAPG-115 will be given alone
APG-115 + APG-2575 combination dose escalation partEXPERIMENTALAPG-115 is given in combination with APG-2575
APG-115 + APG-2575 combination dose expansion partEXPERIMENTALAPG-115 is given in combination with APG-2575
APG-115 monotherapy in part1EXPERIMENTALMultiple dose cohorts, to determine the RP2D of APG-115.
APG-115 combined with APG-2575 in part2EXPERIMENTALMultiple dose cohorts of APG-2575, to determine the RP2D of APG-2575 combined with APG-115.
APG-115+ToripalimabEXPERIMENTAL -
APG-115/APG-115+Cytarabine in Relapse/Refractory AMLEXPERIMENTAL -
APG-115/APG-115+Aza in relapsed/progressed high risk MDSEXPERIMENTAL -
APG-115EXPERIMENTALAPG-115 to be explored sequentially during accelerated dose escalation. This will continue until either the occurrence in Cycle 1 of one DLT or two Grade 2 toxicities (graded as per the National Cancer Institute's Common Terminology Criteria for Adverse Events \[NCI CTCAE\] version 4.0) that are related or possibly related to APG-115. When either of these criteria is fulfilled, dose escalation will be converted to a standard 3+3 escalation scheme,

Interventions

NameTypeDescription
APG-115DRUGQOD, 2 weeks on, 1 week off, in repeated 21-day cycles
APG-2575DRUGAPG-2575 given orally each day in cycle, in repeated 21-day cycles
ToripalimabDRUGToripalimab is administrated following CDE approved label dose, i.e.: 240 mg intravenous infusion at Day 1 of every 3 weeks as a cycle.
AzacitidineDRUG75 mg/m\^2 SC QD on Days 1- 7 (28-day cycle)
CytarabineDRUG1g/m\^2 IV QD on Days 3-7 (28-day cycle)
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites1

Inclusion Criteria: 1. Age ≥ 18 years old 2. Patients with relapsed/refractory T-PLL who have active disease and have received at least one prior therapy; Patients with histologically confirmed diagnosis of NHL, NHL Patients must be either relapsed, refractory, intolerant, or are considered ineligi...

Countries:United StatesChina
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Recent Changes (Last 90 Days)

MEDIUMAug 21, 2026NCT05701306primaryCompletionDate: changed
MEDIUMAug 21, 2026NCT05701306primaryCompletionDate: changed
MEDIUMAug 1, 2026NCT04496349primaryCompletionDate: changed
MEDIUMAug 1, 2026NCT04275518primaryCompletionDate: changed
MEDIUMAug 1, 2026NCT05701306primaryCompletionDate: changed
MEDIUMAug 1, 2026NCT04785196Phase: PHASE2 → PHASE1
MEDIUMAug 1, 2026NCT04496349primaryCompletionDate: changed
MEDIUMAug 1, 2026NCT05701306primaryCompletionDate: changed
MEDIUMAug 1, 2026NCT04785196Phase: PHASE2 → PHASE1
MEDIUMAug 1, 2026NCT04275518primaryCompletionDate: changed
MEDIUMAug 1, 2026NCT04496349primaryCompletionDate: changed
MEDIUMAug 1, 2026NCT04785196Phase: PHASE2 → PHASE1
MEDIUMAug 1, 2026NCT05701306primaryCompletionDate: changed
MEDIUMAug 1, 2026NCT04275518primaryCompletionDate: changed

Frequently asked questions about APG-115

What is APG-115 used for?

APG-115 is an investigational small molecule being studied in patients with advanced solid tumors or lymphoma, acute myeloid leukemia (AML), T-prolymphocytic leukemia, liposarcoma, and neuroblastoma. It is in Phase 1 clinical development for these oncology indications.

What does APG-115 target?

APG-115 targets the MDM2-p53 interaction. It is an inhibitor of MDM2, a protein that regulates the tumor suppressor p53. By inhibiting MDM2, APG-115 aims to reactivate p53 function in cancer cells.

Who is developing APG-115?

APG-115 is being developed by Ascentage Pharma Group International, whose American Depository Shares trade under the ticker AAPG. The company is conducting Phase 1 clinical trials of APG-115 across multiple oncology indications.

What phase is APG-115 in?

APG-115 is in Phase 1 clinical development. It is an investigational drug and has not been approved by regulatory authorities. Multiple Phase 1 trials are ongoing or completed to evaluate its safety and efficacy in various cancers.

What clinical trials is APG-115 in?

APG-115 is being studied in several Phase 1 trials, including NCT02935907 in advanced solid tumors or lymphomas, NCT04275518 in AML and myelodysplastic syndromes, NCT04785196 in liposarcoma or advanced solid tumors combined with a PD-1 inhibitor, and NCT05701306 in neuroblastoma or solid tumors alone or with APG-2575.

Is APG-115 the same as alrizomadlin?

APG-115 is also known as alrizomadlin. It is an MDM2-p53 inhibitor being developed by Ascentage Pharma for the treatment of various cancers, including solid tumors, lymphomas, and leukemias.