Recruiting
Phase 1

ADCT-701

Sponsor:

National Cancer Institute (NCI)

Code:

NCT06041516

Conditions

Neuroendocrine Carcinomas

Neuroendocrine Tumors

Carcinoma, Neuroendocrine

Carcinoma, Adrenocortical

Carcinoma, Adrenal Cortical

Eligibility Criteria

Sex: All

Age: 18 - 70+

Healthy Volunteers: Not accepted

Interventions

ADCT-701

Study Details

Brief summary:

Background:

Neuroendocrine neoplasms (NENs) are rare cancers in the gastrointestinal tract, pancreas, lungs, adrenal glands, and other areas of the body. Many of these cancers have a high risk of relapse and a low chance of survival. Better treatments are needed.

Objective:

To test a new drug, ADCT-701, in people with NENs.

Eligibility:

Adults aged 18 and older with NENs.

Design:

Participants will be screened. They will have a physical exam with blood and urine tests. They will have imaging scans and tests of heart functioning. Their ability to perform normal daily activities will be tested. A biopsy may be needed: A sample of tissue will be removed from the tumor.

ADCT-701 is given through a tube attached to a needle inserted into a vein in the arm. Participants will receive the drug treatment on the first day of 21-day treatment cycles. They will visit the clinic a total of 10 times during the first two cycles. After that, they will visit the clinic 2 times during each cycle. Imaging scans, blood draws, heart function tests, and other tests will be repeated during study visits. Each visit will last up to 8 hours.

Participants may continue receiving treatment with the study drug for up to 2 years.

After treatment ends, participants will have follow-up clinic visits 4 times in 4 months. They will have a physical exam, with heart and blood tests, at each visit. After that, they will have follow-up clinic visits every 9 weeks; these visits will include imaging scans.

Follow-up visits will continue for up to 5 years after treatment began....

Conditions

Neuroendocrine Carcinomas

Neuroendocrine Tumors

Carcinoma, Neuroendocrine

Carcinoma, Adrenocortical

Carcinoma, Adrenal Cortical

Study ID

NCT06041516

Start date

Jun 17, 2024

Status verified date

Jun 11, 2026

Completion date

Oct 30, 2029

Anticipated

Primary completion date

Oct 30, 2027

Anticipated

Eligibility Criteria

Eligibility Criteria

Sex: All

Age: 18 - 70+

Healthy Volunteers: Not accepted

  • INCLUSION CRITERIA:
  • Participants must have histologically or cytologically confirmed neuroendocrine neoplasms or malignant adrenocortical carcinoma (ACC) or malignant peripheral nerve sheath tumors (MPNST).
  • Locally advanced, unresectable or metastatic disease (as confirmed by a radiological evaluation)
  • Participants must have measurable disease per RECIST 1.1.
  • Participants must have received prior standard of care treatment and be refractory to or intolerant to standard of care therapy(s). Note: Patients with MPNST who have refused cytotoxic chemotherapy or for whom treatment on this protocol prior to receiving cytotoxic

chemotherapy is felt to be in the best interest for the patient by the local investigator and treating investigator will also be eligible.

  • Age >= 18 years.
  • ECOG performance status <= 2.
  • Adequate hematologic function as follows:

  • Leukocytes >= 3,000/microliter
  • Absolute neutrophil count (ANC) >= 1,200/microliter (off-growth factors for 72 hours prior to treatment initiation)
  • Hemoglobin (Hgb) >= 9 g/dL with no blood transfusion within 2 weeks prior to treatment initiation
  • Platelets >= 100,000/microliter with no platelet transfusion within 1 week.
  • Adequate renal and hepatic function as follows:

  • Creatinine clearance (CrCl) >= 50 mL/min/1.73 m\^2 (calculated CrCl (Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI) or calculated eGFR provided by a laboratory))
  • Total bilirubin <= 1.5 x ULN OR in participants with known or suspected Gilbert's syndrome, total bilirubin <= 3.0 x ULN
  • Alanine aminotransferase (ALT) and aspartate aminotransferase (AST) <= 2.5 x ULN, (unless liver metastases are present, then values must be <= 5 x ULN).
  • Participants serologically positive for hepatitis C virus (HCV) must have an undetectable HCV viral load.
  • Participants serologically positive for Hepatitis B (HBV) core antibody or surface antigen must be on adequate anti-viral therapy and Hepatitis B Viral deoxyribonucleic acid (DNA) load must be <2000 IU/mL.
  • Participants serologically positive for human immunodeficiency virus (HIV) must be on stable antiretroviral therapy for at least 4 weeks before treatment initiation, have no reported opportunistic infections or Castleman s disease within 12 months prior to treatment initiation, have a viral load that is undetectable by quantitative polymerase chain reaction (PCR) and CD4 count >= 200 cells per cubic millimeter.
  • Participants with brain metastasis are eligible if at least 4 weeks status post radiotherapy or surgery before treatment initiation with no evidence of progression or associated symptoms.
  • Individuals of child-bearing potential (IOCBP) must agree to use a highly effective method of contraception (hormonal, intrauterine device (IUD), surgical sterilization) for the duration of the study treatment and up to 9.5 months after the last dose of the ADCT-701 (restriction period).

Individuals who can father children must agree to use an effective method of contraception (barrier, surgical sterilization) at study entry and up to 6.5 months after the last dose of the ADCT-701.

  • Nursing participants must be willing to discontinue nursing from study treatment initiation through 6.5 months after study treatment discontinuation.
  • Participants or legally authorized representative (LAR) must be able to understand and be willing to sign a written informed consent document.

EXCLUSION CRITERIA:

  • Major surgery, prior treatment with chemotherapy, hormonal therapy, immunotherapy, treatment with an investigational agent, and/or radiation therapy within 4 weeks or 5 half-lives, whichever is shorter, prior to treatment initiation.
  • Participants taking any herbal supplements within 14 days prior to treatment initiation.
  • Participants who have wound dehiscence from prior surgeries.
  • Clinically significant third space fluid accumulation (i.e., ascites requiring drainage or any serosal effusion that is either requires drainage or is associated with shortness of breath) at screening.
  • Active infection requiring systemic antibiotic therapy at screening.
  • Active bleeding diathesis or therapeutic anticoagulation with an oral vitamin K antagonist with target international normalized ratio (INR) > 2 at screening.
  • History of allergic reactions attributed to compounds of similar chemical or biologic composition to the study drug.
  • An active autoimmune disease. Note: Participants with type 1 diabetes, eczema, vitiligo, alopecia, psoriasis, hypo- or hyperthyroid disease, adrenal insufficiency on systemic oral corticosteroid therapy (<= the equivalent of prednisone 10 mg/day), or other mild autoimmune disorders (Type 1 diabetes, eczema, vitiligo, alopecia, rheumatoid arthritis, psoriasis, systemic lupus erythematosus, adrenal insufficiency due to Addison's disease, hypothyroidisms due to Hashimoto's thyroiditis, hyperthyroidisms due to Graves disease, Sjogren s syndrome, celiac disease, pernicious anemia) not requiring immunosuppressive treatment are eligible.
  • Congenital long QT syndrome, or a corrected QTcF interval of >=480 ms, at screening (unless secondary to the pacemaker or bundle branch block).
  • Active second primary malignancy other than non-melanoma skin cancers, nonmetastatic prostate cancer, in situ cervical cancer, ductal or lobular carcinoma in situ of the breast, or other malignancy that does not require current anticancer treatment per standard of care.
  • Live vaccine administration within 30 days prior to treatment initiation.
  • Pregnant individuals (confirmed by Beta-Human Chorionic Gonadotropin \[Beta-HCG\] serum or urine pregnancy test) performed at screening.
  • Uncontrolled intercurrent illness that would limit compliance with study requirements.

Study Design

Enrollment

70 participants

Anticipated

Allocation

Non randomized

Intervention Model

Single group

Primary purpose

Treatment

Interventions and Outcome Measures

Arms

experimental: 1/Arm1

ADCT-701 given as an IV infusion

Interventions

ADCT-701

ADCT-701 in 2microgram/kg-255microgram/kg (weight based dosing), IV over 30 minutes (+15 minutes)

Primary outcome measure

  • Determine the maximum tolerated dose (MTD) of ADCT-701 [ Time Frame: cycle 1, days 1-21 ]

Central Contacts and Locations

Central contacts

Anna Liza F Rivero

(240) 858-7946anna.rivero@nih.gov

Jaydira Del Rivero, M.D.

(240) 858-3851delriveroj@mail.nih.gov

Locations

National Institutes of Health Clinical Center

Recruiting

Bethesda, Maryland, United States, 20892

Contacts

National Cancer Institute Medical Oncology

888-624-1937NCIMO_Referrals@mail.nih.gov

Jaydira Del Rivero, M.D.

(240) 858-3851delriveroj@mail.nih.gov

More Information

Sponsor

National Cancer Institute (NCI)

Last update posted

Jun 15, 2026

Last verified

Jun 11, 2026

Keywords

  • Pheochromocytoma
  • Neuroblastoma
  • Neuroendocrine Tumor
  • Neuroendocrine carcinoma
  • Neuroendocrine neoplasms
  • Paraganglioma
  • Adrenocortical Carcinoma

Trial information was received from ClinicalTrials.gov and was last updated on 2026-09-09. This information was provided to ClinicalTrials.gov by National Cancer Institute (NCI) on 2026-06-15.