Exploring the Theragnostic Value of Osimertinib in EGFR-mutated Lung Cancer (THEROS)

Exclusion Criteria

• •1. EGFR-mutated NSCLC and demonstration of the T790M resistance mutation by standard assay technology in tumor-derived or plasma-derived DNA
• •2. Absence of a tumor lesion with significant FDG uptake at PET/CT scanning prior to study treatment
• •3. Involvement in the planning and/or conduct of the study (applies to both sponsor staff and/or staff at the study site)
• •4. Previous treatment with osimertinib or any experimental or approved mutationspecific EGFR-TKI with clinical activity against the EGFR T790M resistance mutation
• •5. Treatment with an investigational drug within one week or five drug half-lives (whichever is longer) of the compound (3 weeks for antibodies)
• •6. Patients currently receiving (or unable to stop use prior to receiving the first dose of study treatment) medications or herbal supplements known to be potent inducers of CYP3A4 (at least 3 week prior) (Appendix A - Guidance regarding Potential Interactions With Concomitant Medications). All patients must try to avoid concomitant use of any medications, herbal supplements and/or ingestion of foods with known inducer effects on CYP3A4. A list for drug interaction potential is found in section 5.1.6.4 of the osimertinib IB.
• •7. Any unresolved toxicities from prior therapy greater than Common Terminology Criteria for Adverse Events (CTCAE) grade 1 at the time of starting study Treatment with the exception of alopecia and grade 2, prior chemotherapy related neuropathy.
• •8. Any evidence of severe or uncontrolled systemic diseases, including uncontrolled hypertension and active bleeding diatheses, which in the investigator's opinion makes it undesirable for the patient to participate in the trial or which would jeopardise compliance with the protocol, or active infection including hepatitis B, hepatitis C and human immunodeficiency virus (HIV). Screening for chronic conditions is not required.
• •9. Patients with symptomatic CNS metastases who are neurologically unstable
• •10. Past medical history of ILD, drug-induced ILD, radiation pneumonitis requiring steroid treatment, or any evidence of clinically active ILD
• •11. Fasting blood glucose levels above 150 mg/dl (precluding informative FDGPET/ CT scanning)
• •12. Inadequate bone marrow reserve or organ function as demonstrated by any of the following laboratory values:
• •Absolute neutrophil count \<1.5 x 109/L Platelet count \<100 x 109/L Haemoglobin \<90 g/L Alanine aminotransferase \>2.5 times the upper limit of normal (ULN) if no demonstrable liver metastases or \>5 times ULN in the presence of liver metastases Aspartate aminotransferase \>2.5 times ULN if no demonstrable liver metastases or \>5 times ULN in the presence of liver metastases Total bilirubin \>1.5 times ULN if no liver metastases or \>3 times ULN in the presence of documented Gilbert's Syndrome (unconjugated hyperbilirubinaemia) or liver metastases Creatinine \>1.5 times ULN concurrent with creatinine clearance \<50 ml/min (measured or calculated by Cockcroft and Gault equation); confirmation of creatinine clearance is only required when creatinine is \>1.5 times ULN.
• •13. Any of the following cardiac criteria:
• •1. Mean resting corrected QT interval (QTc using Fredericia's formula) \> 470 msec obtained from the screening clinic ECG machine-derived QTc value
• •2. Any clinically important abnormalities in rhythm, conduction or morphology of resting ECG (e.g., complete left bundle branch block, third degree heart block, second degree heart block)
• •3. Any factors that increase the risk of QTc prolongation or risk of arrhythmic events such as heart failure, electrolyte abnormalities (including serum/plasma potassium level below lower level of normal), congenital long QT syndrome, family history of long QT syndrome or unexplained sudden death under 40 years of age in first degree relatives or any concomitant medication known to prolong the QT interval
• •14. Refractory nausea and vomiting, chronic gastrointestinal diseases, inability to swallow the formulated product or previous significant bowel resection that would preclude adequate absorption of osimertinib
• •15. History of hypersensitivity to osimertinib (or drugs with a similar chemical structure or class to osimertinib) or any excipients of these agents
• •16. Males and females of reproductive potential who are not using an effective method of birth control and females who are pregnant or breastfeeding or have a positive (urine or serum) pregnancy test prior to study entry
• •17. Judgment by the Investigator that the patient should not participate in the study if the patient is unlikely to comply with study procedures, restrictions and requirements