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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Br+J+Clin+Pharmacol
2016 ; 81
(5
): 908-17
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gab.com Text
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Pharmacokinetics and safety of single doses of tabalumab in subjects with
rheumatoid arthritis or systemic lupus erythematosus
#MMPMID26648084
Witcher J
; Fleischmann R
; Chindalore VL
; Hansen RJ
; Hu L
; Radtke D
; Voelker J
; Gomez E
; McColm J
Br J Clin Pharmacol
2016[May]; 81
(5
): 908-17
PMID26648084
show ga
AIMS: Two phase 1 studies evaluated the pharmacokinetics (PK), safety and
biological activity of tabalumab, a human monoclonal antibody against B-cell
activating factor (BAFF), administered intravenously (i.v.) or subcutaneously
(s.c.) in subjects with rheumatoid arthritis (RA) or systemic lupus erythematosus
(SLE). METHODS: In study A, subjects with RA (n = 23) or SLE (n = 6) received a
single i.v. dose of tabalumab (RA 0.01, 0.04, 0.125, 0.5, 2.0, and 8.0 mg kg(-1)
and SLE 0.125 or 2.0 mg kg(-1) ) or placebo. In study B, subjects with RA
received a single tabalumab dose i.v. (10 mg) (n = 12) or s.c. (20 mg) (n = 12).
Serum tabalumab and CD20+ B cells were evaluated and safety was assessed
throughout both studies. RESULTS: Tabalumab PK were non-linear across the 0.01 to
8.0 mg kg(-1) dose range. Clearance (CL) decreased from 2.9 to 0.1 l day(-1) and
terminal half-life (t1/2 ) increased from about 1.6 to 25 days. Subjects with RA
or SLE had similar PK. After s.c. dosing, tabalumab time to maximal concentration
(tmax ) was 5.5 days. Absolute bioavailability (F) was approximately 62%.
Following tabalumab dosing, CD20+ B cells transiently increased from baseline
followed by a progressive decrease below baseline. CONCLUSION: A single tabalumab
dose administered i.v. or s.c. was well tolerated and had non-linear CL over the
dose range investigated in subjects with RA and SLE. The non-linearity likely
reflects target-mediated CL due to binding to BAFF. Tabalumab showed biological
activity based on changes in peripheral CD20+ lymphocyte numbers in both subjects
with RA and SLE.