Abstract: The instant invention relates to a method for labeling endonuclease-treated cells, comprising the steps of a) providing cells or a composition comprising cells; b) bringing into contact said cells or said composition with: —at least one endonuclease suitable for targeting a genomic region of interest in said cells, or a vector suitable for expressing said endonuclease in said cells; —at least one first nucleic acid suitable for introducing one or more silent mutation(s) in said genomic region by homology-directed repair (HDR), and optionally one or more non-silent mutation(s); and —at least one second nucleic acid suitable for introducing one or more silent mutation(s) in said genomic region by homology-directed repair (HDR), but distinct from the silent mutations of the first nucleic acid; thereby labeling endonuclease-treated cells.

Abstract: Provided herein are methods and kits for labeling endonuclease-treated cells. The methods comprise: contacting the cells to be labelled with at least one endonuclease suitable for targeting a genomic region of interest, and first and second nucleic acids suitable for introducing one or more silent (or optionally non-silent) mutation(s) in the genomic region by homology-directed repair (HDR). The mutation(s) introduced by the first nucleic acid differ from the mutation(s) introduced by the second nucleic acid.

Abstract: The invention relates to methods for preventing or treating resistance to EGFR inhibitors in cancer patients. More particularly, after performing a screen for small molecules potentially capable of countering cancer resistance to EGFR TKI, inventors identified the multikinase inhibitor sorafenib, which has the property, in combination with EGFR TKI, to prevent the enrichment of tumor cells containing mutations responsible for NSCLC resistance to first and third generation EGFR TKI. These data indicate that this multikinase inhibitor can prevent resistance to several generations of EGFR TKI. These in vitro data were confirmed in an in vivo xenograft mouse model of NSCLC. Finally these data were reproduced in cancer cells using SC-1, a sorafenib analogue.

Abstract: The instant invention relates to a method for labeling endonuclease-treated cells, comprising the steps of: a) providing cells or a composition comprising cells; b) bringing into contact said cells or said composition with: —at least one endonuclease suitable for targeting a genomic region of interest in said cells, or a vector suitable for expressing said endonuclease in said cells; —at least one first nucleic acid suitable for introducing one or more silent mutation(s) in said genomic region by homology-directed repair (HDR), and optionally one or more non-silent mutation(s); and —at least one second nucleic acid suitable for introducing one or more silent mutation(s) in said genomic region by homology-directed repair (HDR), but distinct from the silent mutations of the first nucleic acid; thereby labeling endonuclease-treated cells.