Cetuximab Therapeutic Drug Monitoring in Squamous Cell Carcinoma Head and Neck Cancer Patients: Determination of the Predictive Value Exposure Levels Through a Single Arm Multicentric Study

  • STATUS
    Recruiting
  • participants needed
    122
  • sponsor
    Assistance Publique Hopitaux De Marseille
Updated on 19 February 2024
cancer
carboplatin
squamous cell carcinoma of head and neck
squamous cell carcinoma
carcinoma
fluorouracil
cetuximab
head and neck cancer
neck cancer

Summary

Only about 30 percent of cancer patients have a clinical benefit upon cetuximab administration. Pilot studies in colorectal and head and neck cancer patients have suggested that cetuximab pharmacokinetics (PK), i.e. clearance values, could impact on clinical outcomes such as survival.

Determining cetuximab plasma clearance requires sophisticated PK modeling using population approaches, thus making it difficult to implement in routine clinical practice. In addition, all the preliminary studies with cetuximab were based upon Elisa determination of cetuximab plasma levels, an analytical method that fails to meet the requirements of daily practice in laboratories performing therapeutic drug monitoring. This pilot study aimed at evaluating the mass spec method analytical performance as part of a " real life " study, evaluating the inter-patient variability of exposure levels in head and neck cancer patients, and establishing a putative link between those exposure levels and clinical outcome. Results from 25 patients fully confirmed the analytical performance of the mass spec method (e.g., lack of matrix effect, acceptable sensitivity to monitor trough levels, lack of impact of sampling processing or freezing/thawing cycles). In addition, a large inter-individual variability (Superior at 50 percent) was observed, both in the peak concentrations (Cmax) and in trough levels (Cmin). Most interestingly, despite the limited number of patients enrolled, a statistically significant association was shown between exposure levels (i.e. calculated AUC) and clinical outcome (DCR). This difference was even more significant on Cmin, thus suggesting that simple trough levels monitoring could help to predict efficacy. Further analysis on survival showed that although not statistically significant, a trend towards longer both progression-free survival and overall survival was observed in the subgroup of patients with higher trough levels. In particular, 3-year survival was 29 percent and 0 percent in the subgroups with high and low trough concentrations, respectively (unpublished data).

Beyond tumoral factors, these preliminary data suggest that cetuximab Cmin levels could be a predictive marker of therapeutic efficacy and that simple therapeutic drug monitoring could help to forecast clinical outcome or enable dosage adaptation.

Details
Condition head and neck cancer, head and neck cancer
Age 18years - 75years
Treatment Blood samples
Clinical Study IdentifierNCT04218136
SponsorAssistance Publique Hopitaux De Marseille
Last Modified on19 February 2024

Eligibility

Yes No Not Sure

Inclusion Criteria

Patients aged 18 to 75 years
Adult patient with recurrent or metastatic histologically proven head and neck Squamous Cell Carcinoma
Patients to be treated by standard treatment: chemotherapy with cisplatin or carboplatin and fluorouracil in combination with a cetuximab-based protocol
Patients having signed the non-opposition form

Exclusion Criteria

Patient currently participating in or having participated to a study with another investigational agent
Patients minor
Pregnant or breast-feeding women
Any contra-indication in the Second Primary Cancers
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