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OpenTrials
Completed

NCT Number: NCT03617003

Treatment of Tumors in the Urinary Collecting System of the Kidney or Ureter Using a Light Activated Drug (WST11)

The purpose of this study is to test the safety of a combination of the study drug called WST11 and PDT. Photodynamic therapy (PDT) is a type of ablation therapy (treatment which destroys tumor cells) which has been previously approved for the treatment of patients with other cancers. It works by using a drug that is given through the vein and then is activated in the tumor by light administered during endoscopy, which results in destruction of the cancer cells.

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Key information

Age range

18 year and older

Sex eligibility

All sexes

Study type

Interventional

Phase

Phase 1

Primary location

Memorial Sloan Kettering Cancer Center

New York, 10065, United States

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Age 18 or older
  • Confirmed tissue diagnosis of urothelial carcinoma involving the ureter and/or renal pelvis with pathology reviewed at MSKCC
  • Residual or recurrent cancer following prior endoscopic treatment
  • Ineligible, unwilling or refusing to undergo surgical management by resection of involved kidney or ureter.
  • Karnofsky performance status ≥ 50%
  • Patients with existing ureteral obstruction and/or existing ureteral stent will be permitted. Demonstration of the site and degree of obstruction must be documented by retrograde pyelography at the time of initial and follow up endoscopic procedures within 60 days.
  • Patients should not have received any systemic therapy (including chemotherapy, biologic therapy or immunotherapy) ≤4 weeks prior to treatment
  • Patients on prophylactic or full-dose anticoagulation are eligible, provided the treating physician believes it is safe to temporarily withhold anticoagulation (see Section 9.2)
  • Adequate organ function defined at baseline as:
  • ANC ≥1,000/ µL
  • Platelets ≥75,000/ µL
  • Hb ≥9 g/dl
  • INR ≤1.5 (except for patients who are on full-dose warfarin)
  • Calculated creatinine clearance ≥40 ml/min (using Cockcroft-Gault method)
  • Total serum bilirubin ≤1.5 mg/dL
  • AST/ALT ≤5× upper limit of normal
  • Able to provide written informed consent

Exclusion criteria

  • Pregnant or breast-feeding women. Women of childbearing potential (WOCBP) must undergo a negative pregnancy test (either serum or urine) prior to study entry. Both sexes must use contraception while on study. WOCBP include:
  • Any woman who has experienced menarche and who has not undergone surgical sterilization (hysterectomy, bilateral tubal ligation or oophorectomy) or who is not post-menopausal (defined as amenorrheic ≥12 consecutive months)
  • Women on hormone replacement therapy with documented serum follicle stimulating hormone level > 35 mIU/ml
  • Women who are using oral, implanted or injectable contraceptive hormones or mechanical products such as intrauterine device or barrier methods to prevent pregnancy or are practicing abstinence or where the partner is sterile
  • T4 tumors with involvement of the bowel or major blood vessels • Any other medical or psychiatric comorbidities, including decompensated heart failure, unstable angina or coronary artery disease or severe pulmonary disease that, in the opinion of the study investigator, would make the patient a poor candidate for the study

Treatment and study plan

WST11 mediated vascular targeted phototherapy (VTP)

Drug

All patients will receive intravenous administration of WST11 at a dose of 4 mg/kg, infused over 10 minutes while patients are under anesthesia during their endoscopy procedure, followed by immediate laser light application.

endoscopy

Procedure

Endoscopy of the bladder

Primary outcomes

  1. Maximum tolerated laser fluence rate

    Time frame: 2 years

    The MTD will be defined as the dose whose toxicity rate does not exceed an acceptable threshold of toxicity 20%.in this study, we shall start at 100mW/cm and will carefully escalate the dose to a maximum of 200 mW/cm.

Sponsors and collaborators

Lead sponsor

Memorial Sloan Kettering Cancer Center

Other

Registry information

Official study title

Phase I Study of WST11 Phototherapy for Upper Tract Urothelial Carcinoma

Important dates

Study start
2018
Primary completion
2025
Study completion
2025
First posted
Aug 6, 2018
Registry last updated
Jul 18, 2025

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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