title: Pharmacokinetics of erlotinib for the treatment of high-grade glioma in a pediatric patient with cystic fibrosis: case report and review of the literature.
abstract: A 12-year-old girl with cystic fibrosis was diagnosed with a high-grade glioma after radiographic and biopsy results confirmed the primary intracranial lesion. She was treated with single-agent erlotinib during and after daily localized radiation therapy. Pharmacokinetic studies were conducted to assess the effect of pancreatic enzyme deficiency and intestinal malabsorption secondary to cystic fibrosis on the bioavailability of orally administered erlotinib, a lipophilic drug. Pharmacokinetic analysis of plasma samples from days 1 and 8 demonstrated that absorption of oral erlotinib was not affected by the patient's cystic fibrosis when the drug was given concomitantly with pancreatic enzyme replacement. When pediatric patients with cystic fibrosis are receiving erlotinib or other lipophilic oral drugs, continued supplementation of pancreatic enzymes is recommended, with therapeutic drug monitoring of plasma drug concentrations when feasible, and close observation for therapeutic responses and adverse effects.
authors: Department of Pharmaceutical Services, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, USA.
authors: Shannon R
authors: SR
authors: Christiansen
authors: Alberto
authors: A
authors: Broniscer
authors: J Carl
authors: JC
authors: Panetta
authors: Clinton F
authors: CF
authors: Stewart
mesh_terms: D001682:Biological Availability; D001932:Brain Neoplasms / Q000150:complications / Q000188:drug therapy / Q000532:radiotherapy; D002648:Child; D003131:Combined Modality Therapy; D003550:Cystic Fibrosis / Q000150:complications* / Q000188:drug therapy; D000069347:Erlotinib Hydrochloride; D010188:Exocrine Pancreatic Insufficiency / Q000150:complications / Q000188:drug therapy; D005260:Female; D005910:Glioma / Q000150:complications / Q000188:drug therapy* / Q000532:radiotherapy; D006801:Humans; D008286:Malabsorption Syndromes / Q000209:etiology / Q000503:physiopathology; D020799:Pancrelipase / Q000494:pharmacology / Q000627:therapeutic use; D047428:Protein Kinase Inhibitors / Q000493:pharmacokinetics* / Q000627:therapeutic use; D011799:Quinazolines / Q000493:pharmacokinetics* / Q000627:therapeutic use
chemical_list: D047428:Protein Kinase Inhibitors; D011799:Quinazolines; D020799:Pancrelipase; D000069347:Erlotinib Hydrochloride