Recruiting
Phase 2

PT-112

Sponsor:

National Cancer Institute (NCI)

Code:

NCT05104736

Conditions

Thymic Epithelial Tumor

Recurrent Thymoma

Thymic Cancer

Eligibility Criteria

Sex: All

Age: 18 - 70+

Healthy Volunteers: Not accepted

Interventions

PT-112

Study Details

Brief summary:

Background:

There are no approved drugs to treat recurrent thymoma and thymic carcinoma. New therapies are needed for people with these cancers. Researchers want to see if the drug PT-112 can help. PT-112 kills cancer cells. It also helps the body s immune system fight cancer.

Objective:

To see if the study drug PT-112 can cause tumors to shrink.

Eligibility:

People ages 18 and older who have thymoma or thymic cancer and whose disease returned or progressed after treatment with at least one platinum-containing chemotherapy, or who have refused standard treatment.

Design:

Participants will be screened with:

Review of medical history and medications

Physical exam

Blood and urine tests

CT or MRI scans of parts of the body, including the brain

Participants will get PT-112 in 28-day cycles, on days 1 and 15 of of the first cycle and on day 1 of each cycle after that. They will get the drug by infusion through a catheter. The catheter is a small plastic tube put into a vein. On days they receive the drug, participants will have physical exams and blood and urine tests. They will have an ECG to test heart function on day 1 of each cycle.

Participants will have scans every 8 weeks.

Participants may choose to have tumor biopsies on day 1 of cycles 1 and 3. Biopsies may be guided by an ultrasound or CT scan.

Participants will continue treatment as long as they can handle the side effects and their disease does not get worse, for up to 8 years.

Participants will have follow-up visits 2 weeks and 4 weeks after they stop therapy. Then the study team will check on participants every 3 months until 8 years after the participant joined the study.

Conditions

Thymic Epithelial Tumor

Recurrent Thymoma

Thymic Cancer

Study ID

NCT05104736

Start date

Apr 6, 2022

Status verified date

Aug 26, 2026

Completion date

Jun 30, 2028

Anticipated

Primary completion date

Dec 31, 2027

Anticipated

Eligibility Criteria

Eligibility Criteria

Sex: All

Age: 18 - 70+

Healthy Volunteers: Not accepted

  • INCLUSION CRITERIA:
  • Participants must have histologically confirmed thymoma or thymic carcinoma.
  • Participants should have received at least one prior line of platinum-based chemotherapy. For participants who have refused cytotoxic chemotherapy, a rationale for refusal to receive standard first-line therapy will be captured in the case report form and the medical record. Progressive disease must be documented prior to study entry and participants must have advanced, unresectable disease that is not amenable to surgical resection.
  • Disease must be measurable with at least 1 unidimensional measurable lesion by RECIST 1.1.
  • Participants must be aged >=18 years.
  • ECOG performance status <=1.
  • Participants must have adequate organ and marrow function as defined below:

  • absolute neutrophil count >= 1,500/mm3 OR >= 1.5 x 10(9)/L
  • platelets >=100,000/mm3 OR (Bullet) 100 x 10(9)/L
  • hemoglobin >= 9g/dL (may have been transfused, at least 7 days prior)
  • total bilirubin <= 1.5 x the upper limit of normal range (ULN)
  • AST(SGOT)/ALT(SGPT) <= 2.5 x ULN OR <= 5 x ULN for participants with documented metastatic disease to the liver
  • creatinine <= 1.5x ULN OR:
  • creatinine clearance >= 60 mL/min/1.73 m2 calculated by calculated using eGRF in the clinical lab
  • Negative serum or urine pregnancy test at screening for individuals of childbearing potential (IOCBP). NOTE: IOCBP is defined as any individual who has experienced menarche and who has not undergone successful surgical sterilization or who is not postmenopausal. Absence of pregnancy must be demonstrated unless there is proven menopause (age >= 50 years and last menarche >= 3 years, or documented menopausal sex hormone profile, or surgical castration) at screening.
  • Participants must not become pregnant or start breast feeding during the study. Breastfeeding should be discontinued if the mother is treated with PT-112.
  • Individuals of child-bearing potential and those that can father children with a sexual partner of childbearing potential must use medically effective contraception during the study and for 6 months after the last dose of study medication.
  • Participants with previously treated brain or CNS metastases are eligible provided that the participant has recovered from any acute side effects of radiotherapy and does not require treatment with steroids, and any whole brain radiation therapy was completed at least 2 weeks prior to initiation of study therapy.
  • Ability of participant to understand and the willingness to sign a written informed consent document.

EXCLUSION CRITERIA:

  • History of allergic reactions attributed to compounds of similar chemical or biologic composition to PT-112. Since there is no definitive list of compounds of similar chemical or biologic composition to PT-112, the principal investigator if in doubt, will report known allergies to the pharmacist to make a determination as to whether it is safe to enroll a participant.
  • Concurrent treatment with a non-permitted drug.
  • Concurrent anticancer treatment within 14 days before initiation of study therapy (includes radiotherapy; however, palliative bone-directed radiotherapy is permitted).
  • Major surgery within 14 days before enrollment (excluding prior diagnostic biopsy).
  • Concurrent systemic therapy with immunosuppressive agents within 14 days (or 5 half-lives of a drug, whichever is shorter) before initiation of study therapy.
  • Use of hormonal agents for anti-cancer therapy within 14 days before initiation of study therapy; or use of any investigational drug within 14 days before initiation of study therapy.
  • History of previous malignant disease within the last 2 years with the following exceptions: basal or squamous cell carcinoma of the skin, cervical carcinoma in situ, ductal carcinoma in situ of the breast, papillary or follicular thyroid carcinoma, and non-muscle invasive bladder cancer.
  • Active infection requiring systemic therapy or significant acute or chronic infections including, among others:

  • Hepatitis B virus (HBV) or hepatitis C virus (HCV) infection at screening (positive HBV surface antigen or HCV RNA if anti-HCV antibody screening test positive).
  • Known history of testing positive for HIV or known acquired immunodeficiency syndrome with a detectable viral load. However, participants with HIV who have an undetectable viral load and are on stable doses of Highly Active Antiretroviral Therapy (HAART) can be screened for the study.
  • Persisting toxicity related to prior therapy (NCI CTCAE v. 5 Grade > 1) with the exception of, alopecia, sensory neuropathy Grade <= 2 and hearing loss Grade <=2.
  • Known alcohol or drug abuse.
  • Uncontrolled intercurrent illness including, but not limited to the following:

  • Cardiovascular: SYMPTOMATIC congestive heart failure, unstable angina pectoris or cardiac arrhythmia, either active or within the past 6 months
  • Respiratory: Pneumonitis or Idiopathic pulmonary fibrosis (not radiation-associated fibrosis), either active or within the past 6 months
  • Gastrointestinal: Immune colitis or inflammatory bowel disease, either active or within the past 6 months
  • Hematological: Bleeding diathesis or major bleeding events, either active or within the past 6 months
  • Other: psychiatric illness/social situations that would limit compliance with study requirements, including active suicidal ideation or behavior, either active or within the past 12 months
  • Administration of live vaccines within 4 weeks prior to treatment. COVID-19 vaccines are permitted at screening.

Study Design

Enrollment

53 participants

Anticipated

Intervention Model

Single group

Primary purpose

Treatment

Interventions and Outcome Measures

Arms

experimental: PT-112

PT-112 will be administered intravenously in 28-day cycles, on Days 1 and 15 at a dose of 360 mg/m2 for cycle 1, and on day 1 at 250mg/m2 for each subsequent cycle, until disease progression, development of intolerable adverse events, or until 8 years after an individual participant has been on study

Interventions

PT-112

PT-112 will be administered intravenously in 28-day cycles, on Days 1 and 15 at a dose of 360 mg/m2 for cycle 1, and on day 1 at 250mg/m2 for each subsequent cycle,

Primary outcome measure

  • overall response rate (ORR) [ Time Frame: assessed every 8 weeks while on treatment and then every 3 months after that for a maximum of 8 years from the start of study ]

Central Contacts and Locations

Central contacts

Arun Rajan, M.D.

(240) 760-6236rajana@mail.nih.gov

Locations

National Institutes of Health Clinical Center

Recruiting

Bethesda, Maryland, United States, 20892

Contacts

For more information at the NIH Clinical Center contact National Cancer Institute Referral Office

888-624-1937

More Information

Sponsor

National Cancer Institute (NCI)

Last update posted

Aug 28, 2026

Last verified

Aug 26, 2026

Keywords

  • metallo-pyrophosphate
  • immunogenic cell death
  • osteotropism
  • damage-associated molecular patterns
  • Peripheral Neuropathy

Trial information was received from ClinicalTrials.gov and was last updated on 2026-09-10. This information was provided to ClinicalTrials.gov by National Cancer Institute (NCI) on 2026-08-28.