Molecular Monitoring of cfDNA by ddPCR in Non-small Cell Lung Cancer Treated by Immunotherapy.

Condition(s) studied

Investigational drug(s) / intervention(s)

Molecular monitoring by quantification of cell-free DNA: Molecular monitoring by quantification of cell-free DNA (absolute value and variation from baseline) of two house-keeping genes (RPP30, TMEM11) by droplet digital PCR, during based-immunotherapy treatments of NSCLC patients. Cell-free DNA will be extracted from 4 ml of plasma before treatments by immunotherapy, obtained from blood Streck® tubes. Quantification of house-keeping genes (or mutated genes if some are previously routinely identified in tumor tissue) by ddPCR.

Study summary

Non-small cell lung cancer (NSCLC) is a major public health problem. New treatments as immunotherapy can improve prognosis of patients with NCLC tumors. Nevertheless, no robust biomarker is actually available.

The hypothesis of the trial is to realize a longitudinal molecular monitoring of NSCLC patients treated by immunotherapy using a quantitative analysis of cell-free DNA.

The primary purposes is to study the predictive value of quantification of cell-free DNA at the first reevaluation time, on the clinical benefit, in NSCLC patients treated by immunotherapy (regardless of line, or associated treatments) The secondary purposes in this population of patients is to study the earlier predictive value (before the second treatment by immunotherapy ) of quantification of cell-free DNA, and its relationship with refractory disease and pseudo-progressive disease.

Eligibility

Primary outcome measure(s)

• Predictive value of quantification of cell-free DNA from plasma at the time of the first radiological evaluation, on clinical benefit — Inclusion visit - visit 2 (day 60)
  The quantification of cell-free DNA is realized by droplet digital PCR (ddPCR) using two house-keeping genes (RPP30, TMEM11); if a somatic mutation is identified in the paired tumor DNA in routine practice, this mutation is also quantify in the cell-free DNA from plasma. The quantification of cell-free DNA corresponds to the variation from the time at inclusion and the time at the first radiological evaluation. The clinical benefit is defined by the duration of treatment by immunotherapy.

Trial sites (8)

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