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Interferon beta 1b following natalizumab discontinuation: one year, randomized, prospective, pilot trial.

Gobbi C, Meier DS, Cotton F, Sintzel M, Leppert D, Guttmann CR, Zecca C - BMC Neurol (2013)

Bottom Line: Additional clinical, MRI and safety parameters were assessed.De-escalation therapy from NTZ to IFNB over 1 year was associated with some clinical and radiological disease recurrence.Overall no major safety concerns were observed.

View Article: PubMed Central - HTML - PubMed

Affiliation: Neurocenter of Southern Switzerland, Ospedale Regionale di Lugano, Lugano, Switzerland.

ABSTRACT

Background: Natalizumab (NTZ) discontinuation leads to multiple sclerosis reactivation.The objective of this study is to compare disease activity in MS patients who continued on NTZ treatment to those who were switched to subcutaneous interferon 1b (IFNB) treatment.

Methods: 1-year randomized, rater-blinded, parallel-group, pilot study (ClinicalTrial.gov ID: NCT01144052). Relapsing remitting MS patients on NTZ for ≥12 months who had been free of disease activity on this therapy (no relapses and disability progression for ≥6 months, no gadolinium-enhancing lesions on baseline MRI) were randomized to NTZ or IFNB. Primary endpoint was time to first on-study relapse. Additional clinical, MRI and safety parameters were assessed. Analysis was based on intention to treat.

Results: 19 patients (NTZ n=10; IFNB n=9) with similar baseline characteristics were included. 78% of IFNB treated patients remained relapse free (NTZ group: 100%), and 25% remained free of new T2 lesions (NTZ group: 62.5%). While time to first on-study relapse was not significantly different between groups (p=0.125), many secondary clinical and radiological endpoints (number of relapses, proportion of relapse free patients, number of new T2 lesions) showed a trend, or were significant (new T2 lesions at month 6) in favoring NTZ.

Conclusions: De-escalation therapy from NTZ to IFNB over 1 year was associated with some clinical and radiological disease recurrence. Overall no major safety concerns were observed.

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Related in: MedlinePlus

Mean number of new T2 lesions (nT2L) and gadolinium enhancing lesions (Gd+L) per patient at baseline and at month 3, 6, 9 and 12 of study (statistical analysis was performed with non parametric tests and reported in Results and Table 2).
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Figure 1: Mean number of new T2 lesions (nT2L) and gadolinium enhancing lesions (Gd+L) per patient at baseline and at month 3, 6, 9 and 12 of study (statistical analysis was performed with non parametric tests and reported in Results and Table 2).

Mentions: A higher number of nT2L was detected in the IFNB vs. the NTZ group at each time point (Figure 1), this difference being significant only for time point month 6 (Table 2). However, the overall likelihood to remain free of nT2L was significantly higher with NTZ (62.5%) than with IFNB therapy (25%) (Figure 2). The number of Gd+L per patient did not significantly differ between groups at any time point (Table 2).


Interferon beta 1b following natalizumab discontinuation: one year, randomized, prospective, pilot trial.

Gobbi C, Meier DS, Cotton F, Sintzel M, Leppert D, Guttmann CR, Zecca C - BMC Neurol (2013)

Mean number of new T2 lesions (nT2L) and gadolinium enhancing lesions (Gd+L) per patient at baseline and at month 3, 6, 9 and 12 of study (statistical analysis was performed with non parametric tests and reported in Results and Table 2).
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3750382&req=5

Figure 1: Mean number of new T2 lesions (nT2L) and gadolinium enhancing lesions (Gd+L) per patient at baseline and at month 3, 6, 9 and 12 of study (statistical analysis was performed with non parametric tests and reported in Results and Table 2).
Mentions: A higher number of nT2L was detected in the IFNB vs. the NTZ group at each time point (Figure 1), this difference being significant only for time point month 6 (Table 2). However, the overall likelihood to remain free of nT2L was significantly higher with NTZ (62.5%) than with IFNB therapy (25%) (Figure 2). The number of Gd+L per patient did not significantly differ between groups at any time point (Table 2).

Bottom Line: Additional clinical, MRI and safety parameters were assessed.De-escalation therapy from NTZ to IFNB over 1 year was associated with some clinical and radiological disease recurrence.Overall no major safety concerns were observed.

View Article: PubMed Central - HTML - PubMed

Affiliation: Neurocenter of Southern Switzerland, Ospedale Regionale di Lugano, Lugano, Switzerland.

ABSTRACT

Background: Natalizumab (NTZ) discontinuation leads to multiple sclerosis reactivation.The objective of this study is to compare disease activity in MS patients who continued on NTZ treatment to those who were switched to subcutaneous interferon 1b (IFNB) treatment.

Methods: 1-year randomized, rater-blinded, parallel-group, pilot study (ClinicalTrial.gov ID: NCT01144052). Relapsing remitting MS patients on NTZ for ≥12 months who had been free of disease activity on this therapy (no relapses and disability progression for ≥6 months, no gadolinium-enhancing lesions on baseline MRI) were randomized to NTZ or IFNB. Primary endpoint was time to first on-study relapse. Additional clinical, MRI and safety parameters were assessed. Analysis was based on intention to treat.

Results: 19 patients (NTZ n=10; IFNB n=9) with similar baseline characteristics were included. 78% of IFNB treated patients remained relapse free (NTZ group: 100%), and 25% remained free of new T2 lesions (NTZ group: 62.5%). While time to first on-study relapse was not significantly different between groups (p=0.125), many secondary clinical and radiological endpoints (number of relapses, proportion of relapse free patients, number of new T2 lesions) showed a trend, or were significant (new T2 lesions at month 6) in favoring NTZ.

Conclusions: De-escalation therapy from NTZ to IFNB over 1 year was associated with some clinical and radiological disease recurrence. Overall no major safety concerns were observed.

Show MeSH
Related in: MedlinePlus