외국의 약물유전정보

Afatinib

미국 FDA   원본 보기 | 번역본 보기

1 INDICATIONS AND USAGE
GILOTRIF is indicated for the first-line treatment of patients with metastatic non-small cell lung cancer (NSCLC) whose tumors have epidermal growth factor receptor (EGFR) exon 19 deletions or exon 21 (L858R) substitution mutations as detected by an FDA-approved test [see Clinical Studies (14)]. Limitation of Use: Safety and efficacy of GILOTRIF have not been established in patients whose tumors have other EGFR mutations [see Clinical Studies (14)].
 
2 DOSAGE AND ADMINISTRATION
2.1 Patient Selection
Select patients for the first-line treatment of metastatic NSCLC with GILOTRIF based on the presence of EGFR exon 19 deletions or exon 21 (L858R) substitution mutations in tumor specimens [see Indications and Usage (1) and Clinical Studies (14)]. Information on FDA-approved tests for the detection of EGFR mutations in NSCLC is available at:
http://www.fda.gov/CompanionDiagnostics.
 
12 CLINICAL PHARMACOLOGY
12.1 Mechanism of Action

Afatinib demonstrated inhibition of autophosphorylation and in vitro proliferation of cell lines expressing wildtype EGFR or those expressing selected EGFR exon 19 deletion mutations or exon 21 L858R mutations, including some with a secondary T790M mutation, at afatinib concentrations achieved, at least transiently, in patients.
 
14 CLINICAL STUDIES
 Non-small Cell Lung Cancer (NSCLC)
Study 1: The efficacy and safety of GILOTRIF in the first-line treatment of 345 patients with EGFR mutation-positive, metastatic (Stage IV and Stage IIIb with pleural and/or pericardial effusion as classified by the American Joint Commission on Cancer [AJCC, 6th edition]) NSCLC were established in a randomized, multicenter, open-label trial (Study 1). Tumor samples from 264 patients (178 randomized to GILOTRIF and 86 patients randomized to chemotherapy) were tested retrospectively by the companion diagnostic therascreen® EGFR RGQ PCR Kit, which is FDA-approved for selection of patients for GILOTRIF treatment. The majority of the patients had a tumor sample with an EGFR mutation categorized by the CTA as either exon 19 deletion (49%) or exon 21 L858R substitution (40%), while the remaining 11% had other mutations.
 Figure 2 Forest Plot of PFS and OS for Common (Del19, L858R) and Uncommon (other) EGFR Mutation Categories


 

 There were 26 GILOTRIFtreated patients in the “other” (uncommon) EGFR mutations subgroup with nine unique mutation patterns. None of these 26 patients achieved a complete response, while four achieved a partial response. No responses were seen in GILOTRIFtreated patients with the following mutations: T790M alone (n=2), deletion 19 and T790M (n=3), G719X and T790M (n=1), exon 20 insertion (n=6), and L861Q alone (n=3). There were 11 chemotherapytreated patients in the “other” uncommon EGFR mutation subgroup; of these, four (36%) achieved a partial response.

Patient Information
 - What is GILOTRIF?
that has certain types of abnormal epidermal growth factor receptor (EGFR) genes


(2022.12.16 업데이트)