OTL38 for Intraoperative Imaging of Folate Receptor Positive Lung Nodules


About this study

The purpose of this study is to assess the effectiveness of OTL38 and Near Infrared Imaging (NIR) at identifying pulmonary nodules within the operating theater, and to assess the safety and tolerability of single intravenous doses of OTL38.

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:

  • Male and female subjects 18 years of age and older.
  • Have a primary diagnosis, or a high clinical suspicion, of cancer in the lung warranting surgery based on CT/PET or other imaging.
  • Are scheduled to undergo surgical thoracoscopy for diagnostic wedge resection followed by anatomic lung resection.
  • Female subjects of childbearing potential or less than 2 years postmenopausal agree to use an acceptable form of contraception from the time of signing informed consent until 30 days after study completion.
  • Ability to understand the requirements of the study, provide written informed consent and authorization of use and disclosure of protected health information, and agree to abide by the study restrictions and to return for the required assessments .

Exclusion Criteria:

  • Previous exposure to OTL38.
  • Any medical condition that in the opinion of the investigators could potentially jeopardize the safety of the subject.
  • History of anaphylactic reactions to folate, including synthetic folic acid (pteroylmonoglutamic acid) and contrast agents containing indocyanine green for near infrared imaging. Subjects with a medical history of 'idiopathic anaphylaxis' will require evaluation.
  • History of allergy to any of the components of OTL38, including folic acid.
  • A positive serum pregnancy test at Screening or a positive urine pregnancy test on the day of surgery or day of admission for female subjects of childbearing potential.
  • Clinically significant abnormalities on electrocardiogram (ECG) at screening.
  • Presence of any psychological, familial, sociological condition or geographical challenges potentially hampering compliance with the study protocol and follow-up schedule.
  • Impaired renal function defined as eGFR < 50 mL/min/1.73m^2. Impaired liver function defined as values > 3 x the upper limit of normal (ULN) for alanine aminotransferase (ALT) or aspartate aminotransferase (AST), alkaline phosphatase (ALP), or > 2 x ULN for total bilirubin except in subjects with Gilbert's syndrome.
  • Received an investigational agent in another investigational drug or vaccine trial within 30 days prior to the administration of study drug.
  • Known sensitivity to fluorescent light.

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

Rochester, Minn.

Mayo Clinic principal investigator

Shanda Blackmon, M.D., M.P.H.

Contact us for the latest status

Contact information:

Thoracic Surgery Research Unit

(877) 526-9172

More information


Publications are currently not available

Study Results Summary

Not yet available

Supplemental Study Information

Not yet available


Mayo Clinic Footer