The long-term safety and tolerability of high-dose interferon beta-1a in relapsing-remitting multiple sclerosis: 4-year data from the PRISMS study

2005 ◽  
Vol 12 (8) ◽  
pp. 649-656 ◽  
Author(s):  
R. Gold ◽  
P. Rieckmann ◽  
P. Chang ◽  
J. Abdalla ◽  
Keyword(s):  
Multiple Sclerosis ◽  
Interferon Beta ◽  
High Dose ◽  
Relapsing Remitting ◽  
Remitting Multiple Sclerosis ◽  
Relapsing Remitting Multiple Sclerosis ◽  
High Dose Interferon

scholarly journals Effects of immunomodulatory treatment with subcutaneous interferon beta-1a oncognitive decline in mildly disabled patients with relapsing—remitting multiple sclerosis

2009 ◽  
Vol 16 (1) ◽  
pp. 68-77 ◽  
Author(s):  
F. Patti ◽  
MP Amato ◽  
S. Bastianello ◽  
L. Caniatti ◽  
E. Di Monte ◽  
...  
Keyword(s):  
Multiple Sclerosis ◽  
Cognitive Impairment ◽  
Treatment Group ◽  
Interferon Beta ◽  
Neuropsychological Testing ◽  
High Dose ◽  
Relapsing Remitting ◽  
Disabled Patients ◽  
Remitting Multiple Sclerosis ◽  
Relapsing Remitting Multiple Sclerosis

The objective of this study was to assess the effects of subcutaneous (sc) interferon beta-1a (IFNβ-1a) on cognition in mildly disabled patients with relapsing—remitting multiple sclerosis (RRMS). Patients aged 18—50 years with RRMS (McDonald criteria; Expanded Disability Status Scale score ≤4.0) were assigned IFNβ therapy at the physician’s discretion and underwent standardized magnetic resonance imaging, neurological examination and neuropsychological testing at the baseline and regular intervals for up to three years. This analysis included 459 patients who received sc IFNβ-1a (44 mcg: n = 236; 22 mcg: n = 223; three-year follow up was available for 318 patients). The hazard ratio for cognitive impairment over three years (44 mcg versus 22 mcg) was 0.68 (95% confidence interval [CI]: 0.480—0.972), suggesting a 32% lower risk with the higher dose treatment. At year 3, the proportion of patients who were cognitively impaired increased slightly from 23.5% at the baseline to 24.8% in the IFNβ-1a 22 mcg treatment group, but remained stable at 15.2% in the IFNβ-1a 44 mcg treatment group. The proportion of patients with cognitive impairment at year 3 was significantly higher in the 22 mcg group than in the 44 mcg group (P = 0.03), although a trend was also seen at the baseline (P = 0.058). Multivariate logistic regression (corrected for baseline cognitive deficits) indicated that treatment with the higher dose of IFNβ-1a was predictive of lower cognitive impairment at three years (odds ratio: 0.51, 95% CI: 0.26—0.99) compared with the lower dose of IFNβ-1a. These findings suggest that sc IFNβ-1a may have dose-dependent cognitive benefits in mildly disabled patients with RRMS, and may support early initiation of high-dose IFNβ-1a treatment.

Thrombotic thrombocytopenic purpura-hemolytic uremic syndrome in relapsing-remitting multiple sclerosis patients on high-dose interferon β

2014 ◽  
Vol 20 (13) ◽  
pp. 1783-1787 ◽  
Author(s):  
Catherine Larochelle ◽  
François Grand’maison ◽  
Gilles P Bernier ◽  
Mathieu Latour ◽  
Jean-François Cailhier ◽  
...  
Keyword(s):  
Multiple Sclerosis ◽  
Hemolytic Uremic Syndrome ◽  
Thrombotic Thrombocytopenic Purpura ◽  
Interferon Beta ◽  
High Dose ◽  
Thrombocytopenic Purpura ◽  
Relapsing Remitting ◽  
Uremic Syndrome ◽  
Relapsing Remitting Multiple Sclerosis ◽  
High Dose Interferon

Three women aged 34–47 years old, on high dose interferon beta-1a for relapsing–remitting multiple sclerosis, were hospitalized between 2009–2012 for thrombotic thrombocytopenic purpura-hemolytic uremic syndrome. Patients sought medical attention for neurological symptoms including cephalalgia, blurred vision, confusion, focal deficits and seizures. All patients presented thrombocytopenia, hemolytic anemia and arterial hypertension. Despite plasma exchanges, corticosteroids and anti-CD20 treatments, all patients progressed towards severe renal insufficiency and one patient died of hemorrhagic shock. In this report we identify a rare but morbid complication of interferon beta-1a treatment associated with female gender, Caucasian background and low body mass index.

Longitudinal analyses of the effects of neutralizing antibodies on interferon beta-1b in relapsing-remitting multiple sclerosis

2004 ◽  
Vol 10 (2) ◽  
pp. 126-138 ◽  
Author(s):  
A John Petkau ◽  
Richard A White ◽  
George C Ebers ◽  
Anthony T Reder ◽  
William A Sibley ◽  
...  
Keyword(s):  
Multiple Sclerosis ◽  
Neutralizing Antibodies ◽  
Interferon Beta ◽  
Neutralizing Antibody ◽  
High Dose ◽  
Exacerbation Rate ◽  
Disability Status ◽  
Relapsing Remitting ◽  
Remitting Multiple Sclerosis ◽  
Relapsing Remitting Multiple Sclerosis

We have analysed data on exacerbation rates, Expanded Disability Status Scale (EDSS) scores, and lesion burdens using the results of two neutralizing antibody (NA B) assays (C PE and MxA) from the pivotal relapsing-remitting multiple sclerosis (MS) trial of interferon beta-1b (IFNB) with a longitudinal appro ach, where the influence of NA Bs in individual patients is assessed by comparing responses during NAB- positive and NA B-negative periods. There are apparent influences on exacerbation rate related to dose of IFNB, titer level, and duration of positivity. With the MxA assay, exacerbation rates after switching to NA B-positive status are estimated to be 28% higher [95% confidence interval (CI): (-15%, 92%)] and -2% higher [95% CI: (-21%, 21%)] on the low- and high-dose IFNB arms, respectively. When compared with all NA B-negative periods, exacerbation rates during NA B-positive periods are estimated to be 29% higher [95% C I: (0%, 67%)] and 18% higher [95% CI: (0%, 40%)] on the low- and high-dose IFNB arms, respectively. When NA B-positive patients again become NA B-negative, no evidence of increased exacerbation rates could then be demonstrated. More detailed exploratory analyses indicate that the effects are most evident in the approximately 20% of patients developing high titers. In these patients, the influence of NABs may be self-limited, as titers often diminish or NA Bs become undetectable with time.

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