Fatigue Clinical Trial
Official title:
Phase 1 Study of B-cell Depletion With Rituximab on Oral, Ocular and General Disease Manifestations in Patients With Primary Sjögren's Syndrome
The primary purpose of the study is to determine whether B-cell depletion with Rituximab has an effect on the oral, ocular and general disease manifestations in patients with primary Sjögren´s syndrome, that is, an effect on the symptoms of oral and ocular dryness, improvement of the glandular function and a beneficial effect on the general symptoms such as fatigue. The secondary purpose of the study is the investigate the underlying autoimmune and pathophysiological mechanisms in Sjögren´s syndrome.
The trial is designed as a double-blind parallel comparison between 2 infusions of 1 g
Rituximab and solvent (saline) given two weeks apart, in 22 patients with the diagnosis of
primary Sjögren's syndrome as based on the current American-European consensus
classification criteria. The patients will be followed at the Department of Oral Medicine,
Clinical Oral Physiology, Oral Pathology & Anatomy, University of Copenhagen, the Department
of Rheumatology, Rigshospitalet and at the Department of Ophthalmology, Rigshospitalet.
The primary endpoints are clinical and a response has been delineated as at least 50%
improvement in score. With the provision that this occurs for any item in at least 60% of
the treated patients as compared to 1% in the control patients, a power of over 80% at
doubled sided significance level of 5% is found with 20 patients.The patients will be
followed within this study for 6 months after Rituximab.
The study will allow the first real dynamic appraisal of the immunologic pathophysiology in
Sjögren's syndrome. Hence attempts will be made to determine at the best possible level if
and how Rituximab influences and possibly resets the autoimmunity both at the whole body and
particularly at the local level in the salivary glands. Also the basal transport mechanism
in salivary secretion which must necessarily be perturbed in Sjögren's syndrome will be
scrutinized employing the best available of techniques. Every possible effort to envisage a
priory, and then monitor, the decisive mechanisms has been made.
In particular this includes repetitive biopsies from the parotid glands, which will allow
combining functional and structural data to reduce as much as possible random variability of
crucial quantities. Also this will allow for the first time to assess the relative and
combined utility of obtaining biopsies from both the parotid and labial salivary glands.
Roche A/S provide investigational medicine, but the study was initiated and is entirely
controlled by the investigators.
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