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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 PLoS+One
2015 ; 10
(7
): e0129898
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
B-Lymphocyte Depletion in Myalgic Encephalopathy/ Chronic Fatigue Syndrome An
Open-Label Phase II Study with Rituximab Maintenance Treatment
#MMPMID26132314
Fluge Ø
; Risa K
; Lunde S
; Alme K
; Rekeland IG
; Sapkota D
; Kristoffersen EK
; Sørland K
; Bruland O
; Dahl O
; Mella O
PLoS One
2015[]; 10
(7
): e0129898
PMID26132314
show ga
BACKGROUND: Myalgic Encephalopathy/Chronic Fatigue Syndrome (ME/CFS) is a disease
of unknown etiology. We previously reported a pilot case series followed by a
small, randomized, placebo-controlled phase II study, suggesting that B-cell
depletion using the monoclonal anti-CD20 antibody rituximab can yield clinical
benefit in ME/CFS. METHODS: In this single-center, open-label, one-armed phase II
study (NCT01156909), 29 patients were included for treatment with rituximab (500
mg/m2) two infusions two weeks apart, followed by maintenance rituximab infusions
after 3, 6, 10 and 15 months, and with follow-up for 36 months. FINDINGS: Major
or moderate responses, predefined as lasting improvements in self-reported
Fatigue score, were detected in 18 out of 29 patients (intention to treat).
Clinically significant responses were seen in 18 out of 28 patients (64%)
receiving rituximab maintenance treatment. For these 18 patients, the mean
response durations within the 156 weeks study period were 105 weeks in 14 major
responders, and 69 weeks in four moderate responders. At end of follow-up (36
months), 11 out of 18 responding patients were still in ongoing clinical
remission. For major responders, the mean lag time from first rituximab infusion
until start of clinical response was 23 weeks (range 8-66). Among the nine
patients from the placebo group in the previous randomized study with no
significant improvement during 12 months follow-up after saline infusions, six
achieved a clinical response before 12 months after rituximab maintenance
infusions in the present study. Two patients had an allergic reaction to
rituximab and two had an episode of uncomplicated late-onset neutropenia. Eight
patients experienced one or more transient symptom flares after rituximab
infusions. There was no unexpected toxicity. CONCLUSION: In a subgroup of ME/CFS
patients, prolonged B-cell depletion with rituximab maintenance infusions was
associated with sustained clinical responses. The observed patterns of delayed
responses and relapse after B-cell depletion and regeneration, a three times
higher disease prevalence in women than in men, and a previously demonstrated
increase in B-cell lymphoma risk for elderly ME/CFS patients, suggest that ME/CFS
may be a variant of an autoimmune disease. TRIAL REGISTRATION: ClinicalTrials.gov
NCT01156909.
|*Lymphocyte Depletion
[MESH]
|Adolescent
[MESH]
|Adult
[MESH]
|Aged
[MESH]
|B-Lymphocytes/drug effects
[MESH]
|Fatigue Syndrome, Chronic/*drug therapy
[MESH]
|Female
[MESH]
|Humans
[MESH]
|Immunologic Factors/administration & dosage/adverse
effects/pharmacology/*therapeutic use
[MESH]