Rituximab (RTX) Therapy in Patients With Active TAO

Ophthalmopathy, Thyroid-Associated Clinical Trial

Official title:

Rituximab (RTX) Therapy in Steroid Resistant Patients or Patients Relapsing After Intravenous Steroids With Active TAO

Clinical Trial Details — Status: Active, not recruiting

Administrative data

• NCT number: NCT02378298
• Other study ID #: RTX -TAO
• Status: Active, not recruiting
• Phase: Phase 4
• Start date: December 2011
• Est. completion date: December 2024

Study information

• Verified date: February 2024
• Source: Göteborg University
• Contact: n/a
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

Thyroid Associated Ophthalmopathy is condition affecting the eyes of about 10% of patients with Graves disease. Its combination of protrusion affecting the looks of the patient and pain is often severely affecting the quality of life among these patients.

The standard treatment for this illness today is intravenous glucocorticoids together with methotrexate. The purpose of this study is to evaluate the effect of rituximab on patients that do not respond to or relapse after conventional therapy.

Description:

Diffuse autoimmune hyperthyroidism or Graves' disease (GD) is a common condition mainly affecting women with 2-3% prevalence The increased production of thyroid hormones in GD is driven by autoantibodies directed against the thyroid stimulating hormone (TSH) receptor (TRab). In most cases, this autoimmunity will also affect other tissues, above all the orbital tissue by mechanisms not fully understood -Thyroid Associate Ophthalmopathy (TAO). Symptoms and signs can be mild (grittiness, dry eyes, periorbital swollen, chemosis, redness)-moderate (double eye vision, exophthalmia or severe (optic nerve compression, corneal ulcers). Serious-moderate ocular engagement in TAO is seen in approximately 10% of patients with GD.

Not only has the hyperthyroidism a marked impact on mental health, but the presence of TAO has an additional negative impact on the well-being of these patients, even many years after successful treatment of the hyperthyroidism. It has been suggested that smoking and stress are negative prognostic factors for the course of TAO indicating that a vicious circle. MRI may detect earlier changes than CT that can be used to predict the course of TAO.

The aims of treatment are to retain euthyroidism which can be achieved by anti thyrostatic drugs (ATD), radioiodine treatment or surgery (where patients are pre-treated with ATD) and to avoid TAO as long as possible. If moderate-severe TAO occurs, high dose if intravenous glucocorticoids (GC) are the gold standard considering the side effects. However, many patients are non-steroid responders and for them no treatment except for acute orbital decompression, retro bulbar irradiation and later reconstructive surgery can be offered. When patients relapse immediately after steroids often per oral steroids are given although not recommended from the literature.

Rituximab (RTX) is a mouse-human chimeric antibody designed towards pre B and mature B lymphocytes and that blocks B-cells activation without affecting the regenerating of B cells from stem cells or the plasma cells immunoglobulin production. TAO is a B- lymphocyte mediated disease and in two studies RTX inhibits the active phase of TAO. In a study by Khanna et al a positive effect from RTX is observed in six steroid resistant patients with TAO with a decrease of the inflammation in the orbit, even though no effect on strabismus or proptosis was observed. In another study by Salvi et al , RTX treatment is compared with steroids as a first line treatment for TAO and after 30 weeks of follow up in an unrandomised study design. RTX decreased the activity and severity significantly compared to the steroid group. No relapse was observed in the RTX group but in the steroid group (10%). In the RTX all patients improved, but in the steroid group only 65%. There were more side-effects in the steroid group.

Selection criteria All patients with indication for i.v GC will be evaluate for the study. The patients are recruited consecutively from the region as we are a tertial referral center and iv steroids for TAO is not given on local hospitals..

Patients and study design All patients aged 18-70 years in the western region in Sweden with TAO and indication for iv GC (CAS ≥4) will be evaluated for this prospective open study with RTX+MTX to GC non-responders. If GC respondent but relapsing after 12 weeks of iv GC treatment, patients will be randomized to RTX+MTX or per oral GC+MTX. If non respondent after 4 weeks of intravenous steroid infusion the patient will be eligible for RTX treatment Patients are seen for ophthalmological and endocrine investigations at baseline, 4, 12, 18, 32, 44, 56 and 68 weeks. At similar occasions anthropometric measurements, immunological markers and measures of GC effects (ACTH test, body composition (not all occasions)) will be performed. At baseline and after 30 weeks high quality MRI and Gallium (GA)-PET is performed. Patients undergoing Ga-PET in another study focusing on pituitary imaging (principle investigator HFN) will serve as controls for orbital muscles. The aim of the RTX study is to recruit at least 10 patients in the RTX arm and probably 40-50 patients will be included.

No study with this design has previously been published. The present situation does not offer the patients not responding to GC or with relapses after iv GC infusions any effective treatment. If the RTX proves safe and effective future non-respondent patients will be able to get this treatment. In small studies RTX have had a good effect in TAO, sometimes even better than GC and with less side-effects. It will also lay the ground for future studies that compare RTX and GC in a randomised study design as first line treatment. If GA-PET shows useful in the management of patients with TAO it may become a routine investigation.

Recruitment information / eligibility

• Status: Active, not recruiting
• Enrollment: 26
• Est. completion date: December 2024
• Est. primary completion date: February 1, 2020
• Accepts healthy volunteers: No
• Gender: All
• Age group: 18 Years to 70 Years

Eligibility

Inclusion Criteria:

• ?Man or woman between 18-70 years TAO with CAS of = 4 (less than 3 months).

• Euthyroid for at least 6 weeks

Exclusion Criteria:

• Dysthyroid optic neuropathy (DON)

• Ulcerative Keratitis

• Previous treatment with steroids for TAO (do not include prophylaxis for TAO in connection with radio iodine treatment)

• Previous Treatment with Rituximab (MabThera®)

• Positive Hepatitis B or C serology.

• Receipt of a live vaccine within 4 weeks prior RTX+MTX to randomization

• History of recurrent significant infection or history of recurrent bacterial infections

• Patient who may not attend to the protocol according to the investigators opinion.

• Pregnancy or lactation

• Significant cardiac, including significant or uncontrolled arrhythmia, or pulmonary disease (including obstructive pulmonary disease).

• Any other disease, metabolic dysfunction, physical examination finding, or clinical laboratory finding giving reasonable suspicion of a disease or condition that contraindicates the use of an investigational drug or that may affect the interpretation of the results or render the patient at high risk from treatment complications

• Concomitant malignancies or previous malignancies.

• Previous active tuberculosis

• Alcoholism

• Alcoholic related liver disease or other chronical liver disease

• Bone marrow depression with leukopenia, thrombocytopenia or significant anemia

• Rheumatoid or other significant pulmonary disease

• Allergy to the active substance or any other substance in the medications or murine proteins

• Active, severe infections (such as tuberculosis, sepsis or opportunistic infections)

• Patients with severe immunosuppression

• Severe cardiac failure or severe uncontrolled heart disease

Related Conditions & MeSH terms

• Eye Diseases
• Graves Ophthalmopathy
• Ophthalmopathy, Thyroid-Associated

Intervention

Drug:
• Rituximab
Rituximab (RTX) is a mouse-human chimeric antibody designed towards (CD20) pre B and mature B lymphocytes and that blocks B-cells activation without affecting the regenerating of B cells from stem cells or the plasma cells immunoglobulin production. Rituximab is used in the treatment of hematologic malignancies (B cells lymphoma, chronic lymphatic leukaemia, Waldenströms macroglobulinemia) and autoimmune diseases with B-cell involvement such as rheumatoid arthritis, thrombocytopenic purpura, SLE).
• Iv Methylprednisolone
Solumedrol is an intravenous glucocorticoid that are the gold standard in TAO. All patients start with 500 mg/weeks for 4 weeks. The response is evaluated and patients are randomised to non-responders or responders. The responders continues with the gold standard treatment that is another 500 mg solumedrol/ week in 2 weeks and then 250 mg/ week in 6 weeks.
• peroral methylprednisolone and Methotrexate
Peroral GC (starting with 30 mg and tapering down) is combined with 15-20 mg MTX /week to reduce the needed dose of steroids

Locations

Country	Name	City	State
Sweden	Center for Endocrinology and Metabolism, Sahlgrenska University Hospital	Gothenburg
Sweden	MedTech West, Institute of Neuro Science and Physiology, Department for Clinical Neuro Science and Rehabilitation, Sahlgrenska Academy, University of Gothenburg	Gothenburg
Sweden	Department of Ophthalmology, Sahlgrenska University Hospital/Mölndal	Mölndal
Sweden	Department of Rheumatology, Sahlgrenska University Hospital/Mölndal	Mölndal
Sweden	Department of Radiology, Karolinska University Hospital	Stockholm

Sponsors (2)

Lead Sponsor	Collaborator
Göteborg University	Sahlgrenska University Hospital, Sweden

Country where clinical trial is conducted

Sweden, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Change in Clinical Activity Score (a composite measure of ophthalmological signs and symptoms) between arms	The primary outcome measurement is the responder analysis in Clinical activity score (CAS) according to Mouritz et al and the consensus statement from European Group of Graves orbitopathy (EUGOGO) in the responder analysis. A responder is defined as an improvement in CAS =2 compared with before treatment. This can be analyzed at four occasions; At 4 weeks iv Steroid treatment compared to baseline; In the responder group 12 weeks compared to baseline; In the non-responder group 18 weeks compared to 4 weeks; In the relapse group at 32 and 46 weeks compared to 18 weeks	At 4, 12, 18, 32 and 46 weeks
Primary	Comparison of Clinical Activity Score (a composite measure of ophthalmological signs and symptoms) between arms	The primary outcome measurement is the responder analysis in Clinical activity score (CAS) according to Mouritz et al and the consensus statement from European Group of Graves orbitopathy (EUGOGO) in the responder analysis. A responder is defined as an improvement in CAS =2 compared with before treatment. This can be analyzed at four occasions; At 4 weeks iv Steroid treatment compared to baseline; In the responder group 12 weeks compared to baseline; In the non-responder group 18 weeks compared to 4 weeks; In the relapse group at 32 and 46 weeks compared to 18 weeks	At 4, 12, 18, 32 and 46 weeks
Secondary	Mean/Median change in CAS (a composite measure of of ophthalmological signs and symptoms according to Mouritz et al and the EUGOGO	Mean/Median change in CAS is a secondary measurement outcome and can be evaluated at: 12 weeks in the responder group compared to baseline; 18 weeks in the non-responder group compared to 4 weeks; In the relapse group at 32 and 46 weeks compared to 18 weeks in relapse RTX+MTX and po GC+MTX, respectively	12, 18, 32 and 46 weeks
Secondary	Comparison of Adverse (a composite measure) events between arms	Adverse events are recorded regarding symptoms and effects on glucose metabolism and body composition	At 4, 12, 18, 32 and 46 and 68 weeks
Secondary	Comparison of MRI attenuation of inflammation and CAS	MRI is performed at baseline and after 30 weeks to detect degree of inflammation. This will be compared to the CAS score	At baseline and 30 weeks
Secondary	Comparison of the change in the dynamic measure of standardized uptake values in PET of the orbital muscles to detect inflammation to that on MRI and CAS	PET of orbital muscles is performed at baseline and after 30 weeks	At baseline and 30 weeks