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Efficacy and safety of a new 20% immunoglobulin preparation for subcutaneous administration, IgPro20, in patients with primary immunodeficiency.

Author(s): Hagan JB, Fasano MB, Spector S, Wasserman RL, Melamed I, Rojavin MA, Zenker O, Orange JS

Affiliation(s): Division of Allergic Diseases, Mayo Clinic, 200 First St. S.W., Rochester, MN 55905, USA. hagan.john@mayo.edu

Publication date & source: 2010-09, J Clin Immunol., 30(5):734-45. Epub 2010 May 8.

Publication type: Clinical Trial, Phase I; Clinical Trial, Phase III; Comparative Study; Multicenter Study; Randomized Controlled Trial; Research Support, Non-U.S. Gov't

Subcutaneous human IgG (SCIG) therapy in primary immunodeficiency (PID) offers sustained IgG levels throughout the dosing cycle and fewer adverse events (AEs) compared to intravenous immunoglobulin (IVIG). A phase I study showed good local tolerability of IgPro20, a new 20% liquid SCIG stabilized with L-proline. A prospective, open-label, multicenter, single-arm, phase III study evaluated the efficacy and safety of IgPro20 in patients with PID over 15 months. Forty-nine patients (5-72 years) previously treated with IVIG received weekly subcutaneous infusions of IgPro20. The mean serum IgG level was 12.5 g/L. No serious bacterial infections were reported. There were 96 nonserious infections (rate 2.76/patient per year). The rate of days missed from work/school was 2.06/patient per year, and the rate of hospitalization was 0.2/patient per year. Ninety-nine percent of AEs were mild or moderate. No serious, IgPro20-related AEs were reported. IgPro20 effectively protected patients with PID against infections and maintained serum IgG levels without causing unexpected AEs.

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