Intravenous immune globulin (10% caprylate-chromatography purified) for the treatment of chronic inflammatory demyelinating polyradiculoneuropathy (ICE study): a randomised placebo-controlled trial

Background: Short-term studies suggest that intravenous immunoglobulin might reduce disability caused by chronic inflammatory demyelinating polyradiculoneuropathy (CIDP) but long-term effects have not been shown. We aimed to establish whether 10% caprylate-chromatography purified immune globulin intravenous (IGIV-C) has short-term and long-term benefit in patients with CIDP. Methods: 117 patients with CIDP who met specific neurophysiological inflammatory neuropathy cause and treatment (INCAT) criteria participated in a randomised, double-blind, placebo-controlled, response-conditional crossover trial. IGIV-C (Gamunex) or placebo was given every 3 weeks for up to 24 weeks in an initial treatment period, and patients who did not show an improvement in INCAT disability score of 1 point or more received the alternate treatment in a crossover period. The primary outcome was the percentage of patients who had maintained an improvement from baseline in adjusted INCAT disability score of 1 point or more through to week 24. Patients who showed an improvement and completed 24 weeks of treatment were eligible to be randomly re-assigned in a blinded 24-week extension phase. Analysis was by intention to treat. This trial is registered with ClinicalTrials.gov, number NCT00220740. Findings: During the first period, 32 of 59 (54%) patients treated with IGIV-C and 12 of 58 (21%) patients who received placebo had an improvement in adjusted INCAT disability score that was maintained through to week 24 (treatment difference 33·5%, 95% CI 15·4-51·7; p=0·0002). Improvements from baseline to endpoint were also recorded for grip strength in the dominant hand (treatment difference 10·9 kPa, 4·6-17·2; p=0·0008) and the non-dominant hand (8·6 kPa, 2·6-14·6; p=0·005). Results were similar during the crossover period. During the extension phase, participants who continued to receive IGIV-C had a longer time to relapse than did patients treated with placebo (p=0·011). The incidence of serious adverse events per infusion was 0·8% (9/1096) with IGIV-C versus 1·9% (11/575) with placebo. The most common adverse events with IGIV-C were headache, pyrexia, and hypertension. Interpretation: This study, the largest reported trial of any CIDP treatment, shows the short-term and long-term efficacy and safety of IGIV-C and supports use of IGIV-C as a therapy for CIDP

Safety and tolerability of immune globulin intravenous in chronic inflammatory demyelinating polyradiculoneuropathy.

Abstract BACKGROUND: Chronic inflammatory demyelinating polyradiculoneuropathy (CIDP) is a common inflammatory neuropathy that can be progressive, stepwise progressive, or relapsing and remitting. OBJECTIVES: To further evaluate the long-term safety and tolerability of immune globulin intravenous, 10% caprylate-chromatography purified immune globulin intravenous in CIDP. DESIGN: Randomized multicenter trial. SETTING: Hospitals and outpatient clinics. Patients: Adults with CIDP (n = 117) [corrected]. INTERVENTIONS: Immune globulin intravenous, 10% caprylate-chromatography purified (2 g/kg of body weight) or placebo was infused as a baseline loading dose, followed by a maintenance dose (1 g/kg) every 3 weeks for up to 24 weeks. Patients who responded were rerandomized into a double-blind extension phase of immune globulin intravenous, 10% caprylate-chromatography purified (1 g/kg) or placebo every 3 weeks for up to 24 weeks. Patients who relapsed during the extension phase were withdrawn from the study. MAIN OUTCOME MEASURES: Additional analyses of safety and tolerability. RESULTS: Overall, 113 patients and 95 patients were exposed to immune globulin intravenous, 10% caprylate-chromatography purified and placebo, respectively. Exposure to immune globulin intravenous, 10% caprylate-chromatography purified was approximately twice that of placebo (1096 vs 575 infusions). Most maintenance dose courses were administered over 1 day in the immune globulin intravenous, 10% caprylate-chromatography purified (89.1% of 783 dose courses) and placebo (91.1% of 359 dose courses) groups. The most common drug-related adverse events (AEs) with immune globulin intravenous, 10% caprylate-chromatography purified were headache (4.0 per 100 infusions) and pyrexia (2.4 per 100 infusions). Five drug-related serious AEs (pulmonary embolism, pyrexia, vomiting, and 2 headache events) were reported in 3 patients (2.7%) exposed to immune globulin intravenous, 10% caprylate-chromatography purified. The incidence of drug-related serious AEs was higher after loading dose infusions than after maintenance dose infusions (4 AEs vs 1 AE). Age, weight, CIDP severity, and previous immune globulin intravenous exposure had no substantial effect on the percentage of patients with AEs, including serious AEs. CONCLUSION: Data support a favorable safety and tolerability profile for administration of immune globulin intravenous, 10% caprylate-chromatography purified as CIDP maintenance therapy. TRIAL REGISTRATION: clinicaltrials.gov Identifier: NCT00220740

Understanding the consequences of chronic inflammatory demyelinating polyradiculoneuropathy from impairments to activity and participation restrictions and reduced quality of life: the ICE study.

A randomized trial (ICE trial) in chronic inflammatory demyelinating polyradiculoneuropathy (CIDP) demonstrated significantly more improvement with intravenous immunoglobulin (Gamunex(\uae), Talecris Biotherapeutics, Inc., Research Triangle Park, NC) than placebo. To understand the relationship between CIDP impairments, activity and participation restrictions, and quality of life (QoL) in this trial, we investigated the association between scales representing these outcome levels. Gamunex or placebo was given every 3 weeks for up to 24 weeks to 117 patients in an initial treatment period after which treatment failures were crossed over (alternative treatment). We assessed impairments, activity and participation, and SF-36 component mental (MCS) and physical summaries (PCS). Regression analyses of baseline data were performed (all subjects) and change from baseline to endpoint (Gamunex-treated group only) to determine correlations between outcomes. Grip strength, medical research council (MRC) sum score, and inflammatory neuropathy cause and treatment (INCAT) sensory sum score were the strongest explanatory variables of disability (at baseline: r(2) = 0.46; change from baseline: r(2) = 0.66). Only up to half of the variance in QoL scores (PCS at baseline: r(2) = 0.30; change from baseline: r(2) = 0.41; MCS: at baseline: r(2) = 0.10; change from baseline: r(2) = 0.24) was explained by impairment and activity and participation measures. Future studies are required to elucidate the impact of CIDP on disability and QoL changes, because the obtained correlations provide only partial explanation

Electrophysiology in chronic inflammatory demyelinating polyneuropathy with IGIV.

Patients with chronic inflammatory demyelinating polyneuropathy (CIDP) received immune globulin intravenous, 10% caprylate/chromatography purified (IGIV-C, Gamunex; n=59) or placebo (n=58) every 3 weeks for up to 24 weeks (first period) in a randomized, double-blind, parallel-group, response-conditional, crossover study. Motor and sensory nerves were assessed at baseline and endpoint/week 24. A nonsignificant trend toward improvement in the proximal amplitude of the most severely affected motor nerve was observed with IGIV-C (0.69+/-1.86 mV) versus placebo (0.47+/-2.29 mV), and a greater improvement of 1.08+/-2.15 mV with IGIV-C versus 0.46+/-2.03 mV with placebo (P=0.089) was observed with exclusion of data from Erb's point stimulation. Greater improvements from baseline favoring IGIV-C were observed for 127/142 electrophysiologic parameters. The averaged motor amplitudes from all motor nerves significantly improved with IGIV-C versus placebo [treatment difference, 0.62 mV; 95% confidence interval (CI), 0.05, 1.20; P=0.035], and conduction block decreased significantly (treatment difference, -5.54%; 95% CI, -10.43, -0.64; P=0.027), particularly in the lower limbs. Overall, the data suggest that IGIV-C improves electrophysiologic parameters in CIDP

Long-term safety and efficacy of subcutaneous immunoglobulin IgPro20 in CIDP PATH extension study

Objective: To investigate the long-term safety and efficacy of weekly subcutaneous IgPro20 (Hizentra, CSL Behring) in chronic inflammatory demyelinating polyneuropathy (CIDP). Methods: In a 48-week open-label prospective extension study to the PATH study, patients were initially started on 0.2 g/kg or on 0.4 g/kg weekly and-if clinically stable-switched to 0.2 g/kg weekly after 24 weeks. Upon CIDP relapse on the 0.2 g/kg dose, 0.4 g/kg was (re)initiated. CIDP relapse was defined as a deterioration by at least 1 point in the total adjusted Inflammatory Neuropathy Cause and Treatment score. Results: Eighty-two patients were enrolled. Sixty-two patients initially received 0.4 g/kg, 20 patients 0.2 g/kg weekly. Seventy-two received both doses during the study. Sixty-six patients (81%) completed the 48-week study duration. Overall relapse rates were 10% in 0.4 g/kg-treated patients and 48% in 0.2 g/kg-treated patients. After dose reduction from 0.4 to 0.2 g/kg, 51% (27/53) of patients relapsed, of whom 92% (24 of 26) improved after reinitiation of the 0.4 g/kg dose. Two-thirds of patients (19/28) who completed the PATH study without relapse remained relapse-free on the 0.2 g/kg dose after dose reduction in the extension study. Sixty-two patients had adverse events (AEs) (76%), of which most were mild or moderate with no related serious AEs. Conclusions: Subcutaneous treatment with IgPro20 provided long-term benefit at both 0.4 and 0.2 g/kg weekly doses with lower relapse rates on the higher dose. Long-term dosing should be individualized to find the most appropriate dose in a given patient. Classification of evidence: This study provides Class IV evidence that for patients with CIDP, long-term treatment with SCIG beyond 24 weeks is safe and efficacious.status: publishe

Subcutaneous immunoglobulin for maintenance treatment in chronic inflammatory demyelinating polyneuropathy (PATH): a randomised, double-blind, placebo-controlled, phase 3 trial

Background Approximately two-thirds of patients with chronic inflammatory demyelinating polyneuropathy (CIDP) need long-term intravenous immunoglobulin. Subcutaneous immunoglobulin (SCIg) is an alternative option for immunoglobulin delivery, but has not previously been investigated in a large trial of CIDP. The PATH study compared relapse rates in patients given SCIg versus placebo. Methods Between March 12, 2012, and Sept 20, 2016, we studied patients from 69 neuromuscular centres in North America, Europe, Israel, Australia, and Japan. Adults with definite or probable CIDP who responded to intravenous immunoglobulin treatment were eligible. We randomly allocated participants to 0\uc2\ub72 g/kg or 0\uc2\ub74 g/kg of a 20% SCIg solution (IgPro20) weekly versus placebo (2% human albumin solution) for maintenance treatment for 24 weeks. We did randomisation in a 1:1:1 ratio with an interactive voice and web response system with a block size of six, stratified by region (Japan or non-Japan). The primary outcome was the proportion of patients with a CIDP relapse or who were withdrawn for any other reason during 24 weeks of treatment. Patients, caregivers, and study personnel, including those assessing outcomes, were masked to treatment assignment. Analyses were done in the intention-to-treat and per-protocol sets. This trial is registered with ClinicalTrials.gov, number NCT01545076. Findings In this randomised, double-blind, placebo-controlled trial, we randomly allocated 172 patients: 57 (33%) to the placebo group, 57 (33%) to the low-dose group, and 58 (34%) to the high-dose group. In the intention-to-treat set, 36 (63% [95% CI 50\ue2\u80\u9374]) patients on placebo, 22 (39% [27\ue2\u80\u9352]) on low-dose SCIg, and 19 (33% [22\ue2\u80\u9346]) on high-dose SCIg had a relapse or were withdrawn from the study for other reasons (p=0\uc2\ub70007). Absolute risk reductions were 25% (95% CI 6\ue2\u80\u9341) for low-dose versus placebo (p=0\uc2\ub7007), 30% (12\ue2\u80\u9346) for high-dose versus placebo (p=0\uc2\ub7001), and 6% (\ue2\u88\u9211 to 23) for high-dose versus low-dose (p=0\uc2\ub732). Causally related adverse events occurred in 47 (27%) patients (ten [18%] in the placebo group, 17 [30%] in the low-dose group, and 20 [34%] in the high-dose group). Six (3%) patients had 11 serious adverse events: one (2%) patient in the placebo group, three (5%) in the low-dose group, and two (3%) in the high-dose group; only one (an acute allergic skin reaction in the low-dose group) was assessed to be causally related. Interpretation This study, which is to our knowledge, the largest trial of CIDP to date and the first to study two administrations of immunoglobulins and two doses, showed that both doses of SCIg IgPro20 were efficacious and well tolerated, suggesting that SCIg can be used as a maintenance treatment for CIDP. Funding CSL Behring

Placebo effect in chronic inflammatory demyelinating polyneuropathy: The PATH study and a systematic review

none148siThe Polyneuropathy And Treatment with Hizentra (PATH) study required subjects with chronic inflammatory demyelinating polyneuropathy (CIDP) to show dependency on immunoglobulin G (IgG) and then be restabilized on IgG before being randomized to placebo or one of two doses of subcutaneous immunoglobulin (SCIG). Nineteen of the 51 subjects (37%) randomized to placebo did not relapse over the next 24 weeks. This article explores the reasons for this effect. A post-hoc analysis of the PATH placebo group was undertaken. A literature search identified other placebo-controlled CIDP trials for review and comparison. In PATH, subjects randomized to placebo who did not relapse were significantly older, had more severe disease, and took longer to deteriorate in the IgG dependency period compared with those who relapsed. Published trials in CIDP, whose primary endpoint was stability or deterioration, had a mean non-deterioration (placebo effect) of 43%, while trials with a primary endpoint of improvement had a placebo response of only 11%. Placebo is an important variable in the design of CIDP trials. Trials designed to show clinical improvement will have a significantly lower effect of this phenomenon than those designed to show stability or deterioration.nonenoneLewis R.A.; Cornblath D.R.; Hartung H.-P.; Sobue G.; Lawo J.-P.; Mielke O.; Durn B.L.; Bril V.; Merkies I.S.J.; Bassett P.; Cleasby A.; van Schaik I.N.; Sabet A.; George K.; Roberts L.; Carne R.; Blum S.; Henderson R.; Van Damme P.; Demeestere J.; Larue S.; D'Amour C.; Kunc P.; Valis M.; Sussova J.; Kalous T.; Talab R.; Bednar M.; Toomsoo T.; Rubanovits I.; Gross-Paju K.; Sorro U.; Saarela M.; Auranen M.; Pouget J.; Attarian S.; Le Masson G.; Wielanek A.; Desnuelle C.; Delmon E.; Clavelou P.; Aufauvre D.; Schmidt J.; Zschuentzsch J.; Sommer C.; Kramer D.; Hoffmann O.; Goerlitz C.; Haas J.; Chatzopoulos M.; Yoon R.; Gold R.; Berlit P.; Jaspert-Grehl A.; Liebetanz D.; Kutschenko A.; Stangel M.; Trebst C.; Baum P.; Bergh F.; Klehmet J.; Meisel A.; Klostermann F.; Oechtering J.; Lehmann H.; Schroeter M.; Hagenacker T.; Mueller D.; Sperfeld A.; Bethke F.; Drory I.V.; Algom A.; Yarnitsky D.; Murinson B.; Di Muzio A.; Ciccocioppo F.; Sorbi S.; Mata S.; Schenone A.; Grandis M.; Lauria G.; Cazzato D.; Antonini G.; Morino S.; Cocito D.; Zibetti M.; Yokota T.; Ohkubo T.; Kanda T.; Kawai M.; Kaida K.; Onoue H.; Kuwabara S.; Mori M.; Iijima M.; Ohyama K.; Baba M.; Tomiyama M.; Nishiyama K.; Akutsu T.; Yokoyama K.; Kanai K.; van Schaik I.N.; Eftimov F.; Notermans N.C.; Visser N.; Faber C.; Hoeijmakers J.; Rejdak K.; Chyrchel-Paszkiewicz U.; Casanovas Pons C.; Antonia M.; Gamez J.; Salvado M.; Infante C.M.; Benitez S.; Lunn M.; Morrow J.; Gosal D.; Lavin T.; Melamed I.; Testori A.; Ajroud-Driss S.; Menichella D.; Simpson E.; Lai E.C.-H.; Dimachkie M.; Barohn R.J.; Beydoun S.; Johl H.; Lange D.; Shtilbans A.; Muley S.; Ladha S.; Freimer M.; Kissel J.; Latov N.; Chin R.; Ubogu E.; Mumfrey S.; Rao T.; MacDonald P.; Sharma K.; Gonzalez G.; Allen J.; Walk D.; Hobson-Webb L.; Gable K.Lewis, R. A.; Cornblath, D. R.; Hartung, H. -P.; Sobue, G.; Lawo, J. -P.; Mielke, O.; Durn, B. L.; Bril, V.; Merkies, I. S. J.; Bassett, P.; Cleasby, A.; van Schaik, I. N.; Sabet, A.; George, K.; Roberts, L.; Carne, R.; Blum, S.; Henderson, R.; Van Damme, P.; Demeestere, J.; Larue, S.; D'Amour, C.; Kunc, P.; Valis, M.; Sussova, J.; Kalous, T.; Talab, R.; Bednar, M.; Toomsoo, T.; Rubanovits, I.; Gross-Paju, K.; Sorro, U.; Saarela, M.; Auranen, M.; Pouget, J.; Attarian, S.; Le Masson, G.; Wielanek, A.; Desnuelle, C.; Delmon, E.; Clavelou, P.; Aufauvre, D.; Schmidt, J.; Zschuentzsch, J.; Sommer, C.; Kramer, D.; Hoffmann, O.; Goerlitz, C.; Haas, J.; Chatzopoulos, M.; Yoon, R.; Gold, R.; Berlit, P.; Jaspert-Grehl, A.; Liebetanz, D.; Kutschenko, A.; Stangel, M.; Trebst, C.; Baum, P.; Bergh, F.; Klehmet, J.; Meisel, A.; Klostermann, F.; Oechtering, J.; Lehmann, H.; Schroeter, M.; Hagenacker, T.; Mueller, D.; Sperfeld, A.; Bethke, F.; Drory, I. V.; Algom, A.; Yarnitsky, D.; Murinson, B.; Di Muzio, A.; Ciccocioppo, F.; Sorbi, S.; Mata, S.; Schenone, A.; Grandis, M.; Lauria, G.; Cazzato, D.; Antonini, G.; Morino, S.; Cocito, D.; Zibetti, M.; Yokota, T.; Ohkubo, T.; Kanda, T.; Kawai, M.; Kaida, K.; Onoue, H.; Kuwabara, S.; Mori, M.; Iijima, M.; Ohyama, K.; Baba, M.; Tomiyama, M.; Nishiyama, K.; Akutsu, T.; Yokoyama, K.; Kanai, K.; van Schaik, I. N.; Eftimov, F.; Notermans, N. C.; Visser, N.; Faber, C.; Hoeijmakers, J.; Rejdak, K.; Chyrchel-Paszkiewicz, U.; Casanovas Pons, C.; Antonia, M.; Gamez, J.; Salvado, M.; Infante, C. M.; Benitez, S.; Lunn, M.; Morrow, J.; Gosal, D.; Lavin, T.; Melamed, I.; Testori, A.; Ajroud-Driss, S.; Menichella, D.; Simpson, E.; Lai, E. C. -H.; Dimachkie, M.; Barohn, R. J.; Beydoun, S.; Johl, H.; Lange, D.; Shtilbans, A.; Muley, S.; Ladha, S.; Freimer, M.; Kissel, J.; Latov, N.; Chin, R.; Ubogu, E.; Mumfrey, S.; Rao, T.; Macdonald, P.; Sharma, K.; Gonzalez, G.; Allen, J.; Walk, D.; Hobson-Webb, L.; Gable, K