Targeted Alpha Therapy Using Astatine (At-211) Against Differentiated Thyroid Cancer

NCT05275946 | Completed Phase 1

• 1 other identifier: AT1-001
• Study Type: interventional
• Target: 11
• Locations: 1 country
• Sites: 1

Brief Summary

Single intravenous administration of TAH-1005 is performed in patients with differentiated thyroid cancer (papillary cancer, follicular cancer) who cannot obtain therapeutic effect with standard treatment or who have difficulty in implementing and continuing standard treatment. The safety, pharmacokinetics, absorbed dose, and efficacy will be evaluated to determine the recommended dose for Phase II clinical trial.

Conditions

Thyroid Cancer

Keywords

Targeted alpha therapy; Astatine (At-211)

Outcome Measures

Primary Outcomes (2)

• Treatment-related adverse events as assessed by CTCAE v5.0

  Type, severity, frequency of occurrence and duration of adverse events

  From the start of iodine restriction to 6 months after administration

• Dose Limiting Toxicity

  Toxicity is defined as one or more of the following items for which a causal relationship with the investigational drug cannot be ruled out. 1. Grade 3 \* hematological toxicity that lasts for 7 days or more 2. Hematological toxicity of Grade 4 \* or higher regardless of duration 3. Febrile neutropenia regardless of duration 4. Thrombocytopenia with bleeding tendency or requiring platelet transfusion 5. Anemia requiring red blood cell transfusion 6. Neutropenia with infection 7. Non-hematological toxicity of Grade 3 \* or higher that does not improve with symptomatic treatment and lasts for 7 days or longer. However, the following are excluded. * Abnormal laboratory test values that are not clinically significant * Toxicity that can be controlled to Grade 2 \* or less with maximum supportive care * Due to exacerbation of the underlying disease (\*: Grade specified in CTCAE v.5.0J COG version)

  within 4 weeks after administration

Secondary Outcomes (28)

• Blood pressure

  within 4 weeks after administration

• Heart rate

  within 4 weeks after administration

• Blood oxygen saturation

  within 4 weeks after administration

• Respiratory rate

  within 4 weeks after administration

• Body temperature

  within 4 weeks after administration

Study Arms (1)

Treatment group

OTHER

Drug: Targeted alpha therapy

Interventions

Targeted alpha therapy DRUG

Single intravenous administration

Treatment group

Eligibility Criteria

• Age: Up to 18 Years
• Sex: all
• Healthy Volunteers: No
• Age Groups: Child (0-17), Adult (18-64)

You may qualify if:

• Patients with differentiated thyroid cancer (papillary cancer, follicular cancer) after total thyroidectomy who meet the following conditions (1) resistance to standard treatment or (2) difficulty in continuing standard treatment (1) Patients who are refractory to standard treatment such as 131I-NaI treatment Insufficient therapeutic effect after 3 or more 131I-NaI treatments. 131I-NaI treatment resistance and difficulty in performing or continuing tyrosine kinase inhibitor (TKI) treatment (2) Patients who have difficulty continuing standard treatment such as 131I-NaI treatment Ablation for residual thyroid or 131I-NaI treatment for relapsed / metastatic lesions has been performed, but relapsed / metastatic lesions were observed at the time of participation in this study, and 131I-NaI is the standard treatment. If it is difficult to continue treatment or if local radiation therapy (including addition) is not indicated (if it is not 131I-NaI treatment resistant, TKI treatment is not indicated).
• Patients aged 18 years or older at the time of consent acquisition
• Patients with stable general condition with PS (Performance status) of 0 to 2 in ECOG (Eastern Cooperative Oncology Group)
• Patients who can be expected to survive for 6 months or more, judging from clinical symptoms and medical examination findings
• Patients with no or controlled brain metastases with symptoms
• Patients with no clinically significant abnormal findings in electrocardiogram, respiratory rate, and blood oxygen saturation within 30 days before registration
• Patients whose laboratory values within 30days before the enrollment are within the range specified in the protocol
• Patients who thoroughly listened to the explanation of the clinical trial, agreed to the examination, visit during the observation period and follow-up survey, contraception during the clinical trial period, etc. according to the clinical trial protocol, and signed the consent document.

You may not qualify if:

• Patients who need fertility preservation
• Pregnant or potentially pregnant women, lactating patients
• Patients with active double cancer (simultaneous double cancer and ectopic double cancer with a disease-free period of 5 years or less)
• Patients who received other investigational or unapproved drugs within 5 weeks prior to enrollment
• Patients who received chemotherapy, immunotherapy or radiation therapy within 8 weeks prior to enrollment in this study
• Patients with uncontrollable active infections
• HBsAg positive, HCV antibody positive or HIV antibody positive patients
• Patients with mental illness or psychiatric symptoms who are judged to be difficult to participate in clinical trials
• Other patients who are judged to be inappropriate by the investigator, etc.

Sponsors & Collaborators

• Osaka University: lead

Study Sites (1)

Osaka University Hospital

Suita, 565-0871, Japan

Location

MeSH Terms

Conditions

Thyroid Neoplasms

Condition Hierarchy (Ancestors)

Endocrine Gland Neoplasms; Neoplasms by Site; Neoplasms; Head and Neck Neoplasms; Endocrine System Diseases; Thyroid Diseases

Study Design

• Study Type: interventional
• Phase: phase 1
• Allocation: NA
• Masking: NONE
• Purpose: TREATMENT
• Intervention Model: SINGLE GROUP
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Assistant Professor

Study Record Dates

• First Submitted: January 22, 2022
• First Posted: March 11, 2022
• Study Start: November 20, 2021
• Primary Completion: December 31, 2024
• Study Completion: March 31, 2025
• Last Updated: April 24, 2025

Record last verified: 2025-04

Locations

JP (1)