🏛️ Verified NIH Record • Updated 2026-04-29

Study in Advanced Solid Tumor Patients (NCT07300943)

A Phase 1/2 Study of CLIO-8221 in Patients With Advanced Solid Tumors

🟢 Recruiting Phase1 / Phase2 💊 Investigational Drug / Biologic Sponsor: Callio Therapeutics

🩺 Plain-English Summary (8th-Grade Level)

The study will be conducted in 2 phases: Phase 1: Dose-escalation and Dose Level Expansion, Phase 1 will determine the maximum tolerated dose (MTD) and/or recommended dose for expansion (RDE). Phase 2: Tumor-Specific Expansions with Dose Optimization, Phase 2 will further evaluate CLIO-8221 in tumor-specific expansion cohorts to optimize dosing and assess preliminary efficacy.

Who can join: To join this study, participants generally need to meet the listed inclusion criteria (5 items) and avoid the listed exclusions (9 items).

Location: DFCI — Boston, Massachusetts

Age range: 18 Years

🧪 Interventions in This Study

📋 "Do I Qualify?" — 1-Minute Self Screener

Instant Checklist

Check every box below. If you can check all of them, you may meet the study's basic screening requirements (final eligibility is confirmed by the site team).

Usually NOT eligible if any of the following apply:

  • Exclusion Criteria:
  • Prior anti-tumor treatment with an ATRi.
  • Prior or concurrent malignancy whose natural history or treatment has the potential to interfere with the safety or efficacy assessment of the investigational regimen. Exceptions are malignancies with a negligible risk of metastasis or death (e.g., 5-year OS ≥90%), including, but not limited to, adequately treated carcinoma in situ of the cervix, non-melanoma skin carcinoma, localized prostate cancer, ductal carcinoma in situ, and Stage I uterine cancer.
  • History of uncontrolled seizure disorders or clinically significant neurodegenerative disorders, including progressive peripheral neuropathy. Stable Grade ≤ 2 peripheral neuropathy is allowed.
  • Clinically significant autoimmune disease, either currently present or present within the previous 2 years, including a current requirement for systemic immunosuppressive therapy equivalent to \>10 mg/prednisone daily (local immunosuppressive therapy such as inhaled or topical corticosteroids is allowed).
  • Any uncontrolled Grade ≥ 3 (per NCI CTCAE version 6.0) viral, bacterial, or fungal infection within 2 weeks prior to Cycle 1 Day 1. Routine antimicrobial prophylaxis is permitted.
  • History of hepatic cirrhosis, autoimmune hepatitis, or drug-associated hepatitis within the past 12 months.
  • Uncontrolled diabetes mellitus, defined as Hgb A1c ≥8% or Hgb A1c between 7% and \<8% with associated diabetes symptoms (polyuria or polydipsia) that are not otherwise explained.
  • Any other medical, social, or psychosocial factors that, in the opinion of the investigator, could impact safety or compliance with study procedures. Additional protocol defined inclusion/exclusion criteria may apply

🔍 Extracted verbatim from the official NIH eligibility criteria. Always confirm with the study coordinator.

📍 All Participating Trial Locations (11 Sites)

  • DFCI — Boston, Massachusetts
  • Sarah Cannon Research Institute 335 24th Avenue North, Suite 400 — Nashville, Tennessee
  • MD Anderson Cancer Center — Houston, Texas
  • START San Antonio — San Antonio, Texas
  • START Mountain — West Valley City, Utah
  • Scientia Clinical Research — Randwick, New South Wales
  • Integrated Clinical Oncology Network Pty Ltd — South Brisbane, Queensland
  • Peter Maccallum Cancer Centre — Box Hill, Victoria
  • AlfredHealth — Heidelberg, Victoria
  • Royal Melbourne Hospital — Melbourne, Victoria
  • Linear Clinical Research Ltd — Nedlands, Western Australia

📞 Contact the Study Coordinator

Phone: (206) 602-3134

Email: clinical@calliotx.com

Coordinator details come directly from the registered NIH protocol. Confirm the study is still recruiting before traveling.

💰 Cost, Insurance & Patient Rights

  • 100% Free Items: The investigational treatment and protocol-required procedures are supplied at zero cost by the sponsor.
  • Routine Patient Care: Under federal law (ACA § 2709) and many state statutes, routine care costs are covered during participation.
  • Voluntary Participation: You may withdraw at any time without affecting your standard medical care.

💡 How to Participate

  1. Check the checklist above to see if you may qualify.
  2. Contact the study coordinator using the phone/email above.
  3. Ask about the visit schedule, what is covered at no cost, and any travel support.
  4. Confirm with your own doctor before making a decision.
🏛️ View Official NIH Record ↗