A Phase 1B Dose-escalation Study of TRC105 in Combination With Pazopanib in Patients With Advanced Soft Tissue Sarcoma


About this study

The purpose of the phase 1b portion is to evaluate safety and tolerability and determine a recommended phase 2 dose for TRC105 when added to standard dose pazopanib in patients with advanced soft tissue sarcoma.

The purpose of the phase 2 portion is to estimate the PFS of patients with advanced soft tissue sarcoma by RECIST 1.1.

Participation eligibility

Participant eligibility includes age, gender, type and stage of disease, and previous treatments or health concerns. Guidelines differ from study to study, and identify who can or cannot participate. There is no guarantee that every individual who qualifies and wants to participate in a trial will be enrolled. Contact the study team to discuss study eligibility and potential participation.

Inclusion Criteria:

  1. Histologically confirmed unresectable soft tissue sarcoma (i.e., non-GIST, non-adipocytic) that has progressed following treatment with chemotherapy. Prior pazopanib is allowed if the drug was not discontinued for toxicity in the phase 2 angiosarcoma cohort only
  2. Histologically confirmed metastatic soft tissue sarcoma (i.e., non-GIST, non-adipocytic) that has progressed by RECIST following treatment with anthracycline chemotherapy. Patients may have received up to four lines of systemic therapy for metastatic disease and no more than two lines of combination treatment ( Phase 2 only)
  3. Measurable disease by RECIST
  4. Age of 18 years or older
  5. ECOG performance status ≤ 1
  6. Resolution of all acute adverse events resulting from prior cancer therapies to NCI CTCAE grade ≤ 1 or baseline (except alopecia or neuropathy)
  7. Adequate organ function
  8. Willingness and ability to consent for self and to comply with scheduled visits, treatment plan, laboratory tests, and other study procedures
  9. Available archival tumor specimen of the soft tissue sarcoma that meets inclusion criterion #1 or #2.

Exclusion Criteria:

  1. Prior treatment with TRC105
  2. Prior treatment with a VEGFR TKI (including pazopanib) (Part 2 only)
  3. Current treatment on another therapeutic clinical trial
  4. Receipt of systemic anticancer therapy, including investigational agents, within 28 days of starting study treatment. If anticancer therapy was given within 28 days of starting study treatment, patients may be included if 5 times the elimination half life of the drug has passed.
  5. No major surgical procedure or significant traumatic injury within 6 weeks prior to study registration, and must have fully recovered from any such procedure; date of surgery (if applicable). Note: the following are not considered to be major procedures and are permitted up to 7 days before therapy initiation: Thoracentesis, paracentesis, port placement, laparoscopy, thorascopy, tube thoracostomy, bronchoscopy, endoscopic ultrasonographic procedures, mediastinoscopy, skin biopsies, incisional biopsies, imaging-guided biopsy for diagnostic purposes, and routine dental procedures
  6. Patients who have received wide field radiotherapy ≤ 28 days (defined as > 50% of volume of pelvic bones or equivalent) or limited field radiation for palliation < 14 days prior to cycle 1 day 1 or those patients who have not recovered adequately from side effects of such therapy
  7. Uncontrolled chronic hypertension defined as systolic > 150 or diastolic > 90 despite optimal therapy (initiation or adjustment of BP medication prior to study entry is allowed provided that the average of 3 BP readings at a visit prior to enrollment is < 150/90 mm Hg)
  8. Significant ascites, or pericardial or pleural effusion
  9. History of brain involvement with cancer, spinal cord compression, or carcinomatous meningitis, or new evidence of brain or leptomeningeal disease. Patients with radiated or resected lesions are permitted, provided the lesions are fully treated and inactive, patients are asymptomatic, and no steroids have been administered for at least 28 days.
  10. Angina, MI, symptomatic congestive heart failure, cerebrovascular accident, transient ischemic attack, arterial embolism, pulmonary embolism, PTCA or CABG within the past 6 months. Deep venous thrombosis within 6 months, unless the patient is anti-coagulated without the use of warfarin for at least 2 weeks. In this situation, low molecular weight heparin is preferred.
  11. Active bleeding or pathologic condition that carries a high risk of bleeding (e.g. hereditary hemorrhagic telangiectasia). Patients who have been uneventfully anti-coagulated with low molecular weight heparin are eligible.
  12. Thrombolytic use (except to maintain i.v. catheters) within 10 days prior to first day of study therapy
  13. Known active viral or nonviral hepatitis or cirrhosis
  14. History of hemorrhage or hemoptysis (> ½ teaspoon bright red blood) within 3 months of starting study treatment
  15. History of peptic ulcer within the past 3 months of treatment, unless treated for the condition and complete resolution has been documented by esophagogastroduodenoscopy (EGD) within 28 days of starting study treatment
  16. History of gastrointestinal perforation or fistula in the past 6 months, or while previously on antiangiogenic therapy, unless underlying risk has been resolved (e.g., through surgical resection or repair)
  17. Known human immunodeficiency virus (HIV) or acquired immunodeficiency syndrome (AIDS) related illness
  18. Receipt of a strong CYP3A4 inducer within 12 days prior to cycle 1 day 1 or a strong CYP3A4 inhibitor within 7 days prior to cycle 1 day 1 (Table 8)
  19. Pregnancy or breastfeeding.

Participating Mayo Clinic locations

Study statuses change often. Please contact the study team for the most up-to-date information regarding possible participation.

Mayo Clinic Location Status Contact

Jacksonville, Fla.

Mayo Clinic principal investigator

Steven Attia, D.O.

Closed for enrollment

Contact information:

Cancer Center Clinical Trials Referral Office

(855) 776-0015

Rochester, Minn.

Mayo Clinic principal investigator

Steven Robinson, M.B.B.S.

Closed for enrollment

Contact information:

Cancer Center Clinical Trials Referral Office

(855) 776-0015

More information


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Additional contact information

Cancer-related trials contact form

Phone: 855-776-0015 (toll-free)

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