TY - JOUR
T1 - Phase I trial of 40-kd branched pegylated interferon alfa-2a for patients with advanced renal cell carcinoma
AU - Motzer, R. J.
AU - Rakhit, A.
AU - Ginsberg, M.
AU - Rittweger, K.
AU - Vuky, J.
AU - Yu, R.
AU - Fettner, S.
AU - Hooftman, L.
PY - 2001/3/1
Y1 - 2001/3/1
N2 - Purpose: Pegylated (40 kd) interferon alfa-2a (IFNα2a) (PEGASYS, Hoffman-La Roche, Nutley, NJ; PEG-IFN) is a modified form of recombinant human IFNα2a with sustained absorption and prolonged half-life after subcutaneous administration. A phase I study of PEG-IFN with pharmacokinetic and pharmacodynamic evaluations was conducted in previously untreated patients with advanced renal cell carcinoma (RCC). Patients and Methods: Twenty-seven patients were enrolled onto cohorts of three or six patients. PEG-IFN was administered on a weekly basis by subcutaneous injection. The dose was escalated from 180 μg/wk to a maximum of 540 μg/wk in 90-μg increments. Serial venous blood samples were drawn to assess concentrations of PEG-IFN and two immunologic surrogates, neopterin and 2′-5′ oligoadenylate synthetase (OAS). Results: The maximum-tolerated dose was determined as 540 μg/wk, because two patients experienced dose-limiting toxicity within 28 days of starting treatment. One developed serum grade 3 ALT elevation, and a second developed grade 3 fatigue. Six patients were treated at 450 μg/wk without dose-limiting toxicity. Over the course of treatment, the side-effect profile was mostly mild to moderate in intensity. Adverse events included fatigue, fever, headache, myalgia, nausea, and decreased appetite. Five patients (19%) achieved a partial response. The mean maximum serum concentration increased from 5.0 to 27 ng/mL, and mean area under the curve increased from 247 to 2,981 ng/h/mL, with dose escalation from 180 μg/wk to 540 μg/wk. Serum concentration of PEG-IFN was sustained at close to peak during the dasing interval, and steady-state was achieved in approximately 5 weeks. The immunologic surrogates, neopterin and OAS, were induced at all doses with a sustained concentration profile similar to PEG-IFN. Conclusion: PEG-IFN is a modified form of IFNα2a with distinct pharmacokinetic advantages and immunomodulatory and antitumor activity for patients with advanced RCC. A dose of 450 μg/wk by subcutaneous administration was determined as a suitable dose for further study. PEG-IFN is more convenient to administer than IFNα and has potential for increased efficacy, less toxicity, or both. The efficacy and toxicity of PEG-IFN will be further assessed in clinical trials and compared with IFNα.
AB - Purpose: Pegylated (40 kd) interferon alfa-2a (IFNα2a) (PEGASYS, Hoffman-La Roche, Nutley, NJ; PEG-IFN) is a modified form of recombinant human IFNα2a with sustained absorption and prolonged half-life after subcutaneous administration. A phase I study of PEG-IFN with pharmacokinetic and pharmacodynamic evaluations was conducted in previously untreated patients with advanced renal cell carcinoma (RCC). Patients and Methods: Twenty-seven patients were enrolled onto cohorts of three or six patients. PEG-IFN was administered on a weekly basis by subcutaneous injection. The dose was escalated from 180 μg/wk to a maximum of 540 μg/wk in 90-μg increments. Serial venous blood samples were drawn to assess concentrations of PEG-IFN and two immunologic surrogates, neopterin and 2′-5′ oligoadenylate synthetase (OAS). Results: The maximum-tolerated dose was determined as 540 μg/wk, because two patients experienced dose-limiting toxicity within 28 days of starting treatment. One developed serum grade 3 ALT elevation, and a second developed grade 3 fatigue. Six patients were treated at 450 μg/wk without dose-limiting toxicity. Over the course of treatment, the side-effect profile was mostly mild to moderate in intensity. Adverse events included fatigue, fever, headache, myalgia, nausea, and decreased appetite. Five patients (19%) achieved a partial response. The mean maximum serum concentration increased from 5.0 to 27 ng/mL, and mean area under the curve increased from 247 to 2,981 ng/h/mL, with dose escalation from 180 μg/wk to 540 μg/wk. Serum concentration of PEG-IFN was sustained at close to peak during the dasing interval, and steady-state was achieved in approximately 5 weeks. The immunologic surrogates, neopterin and OAS, were induced at all doses with a sustained concentration profile similar to PEG-IFN. Conclusion: PEG-IFN is a modified form of IFNα2a with distinct pharmacokinetic advantages and immunomodulatory and antitumor activity for patients with advanced RCC. A dose of 450 μg/wk by subcutaneous administration was determined as a suitable dose for further study. PEG-IFN is more convenient to administer than IFNα and has potential for increased efficacy, less toxicity, or both. The efficacy and toxicity of PEG-IFN will be further assessed in clinical trials and compared with IFNα.
UR - http://www.scopus.com/inward/record.url?scp=0035281760&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0035281760&partnerID=8YFLogxK
U2 - 10.1200/JCO.2001.19.5.1312
DO - 10.1200/JCO.2001.19.5.1312
M3 - Article
C2 - 11230473
AN - SCOPUS:0035281760
SN - 0732-183X
VL - 19
SP - 1312
EP - 1319
JO - Journal of Clinical Oncology
JF - Journal of Clinical Oncology
IS - 5
ER -