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B cells are considered major contributors to multiple sclerosis (MS) pathogenesis, a role that has taken on renewed importance with the advent of B-cell-depleting therapies. Rituximab is being increasingly utilized as an off-label treatment option across MS patients .
In addition, there have been increasing reports of rituximab causing hypogammaglobulinaemia and antibody deficiency across a variety of conditions including MS and related neuroinflammatory disorders.
Therefore, the purpose of this study is to evaluate the rate of hypogammaglobulinemia in rituximab-treated MS adult patients and to assess the correlation with vaccination response during the treatment.
This is a prospective study which will be conducted in an educational medical hospitals in Sari, Iran.Adult patients with diagnosis of multiple sclerosis compatible with 2017 McDonald criteria and history of treatment with rituximab at least 3 times( 18 month) , enrolled to this study.Demographic patients' characteristics, including age, sex, vital sign, past medical history, drug history, will be recorded. Disease duration prior to rituximab, total rituximab dose, prior immunomodulatory drugs, Adverse drug reactions, the time interval between the last rituximab infusion and need for intravenous immunoglobulin replacement therapy and infections are recorded. Moreover, we will assess IgG and IgM levels, VZV titer at before rituximab administration and 6, 12, 18, months following the initiation of next dose of rituximab.
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| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Serum immunoglobulin titer | Diagnostic Test | Serum IgG and IgM levels, VZV titer every 6 month at before rituximab administration 3 times |
| Measure | Description | Time Frame |
|---|---|---|
| Rate of hypogammaglobinemia | serum IgG concentration lower than g/L, | every 6 month until 18 month |
| Measure | Description | Time Frame |
|---|---|---|
| severity of hypogammaglobinemia | serum IgG concentration: mild (at risk) 5- 6.9 g/L, moderate 3- 4.9 g/L and severe < 3 g/L | every 6 month until 18 month |
| immunization response to VZV vaccination |
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Inclusion Criteria:
Exclusion Criteria:
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Any adult patients with diagnosis of multiple sclerosis compatible with 2017 McDonald criteria and meet the inclusion and exclusion criteria from January 2020 until sample size will be reach, that refer to MS clinic of Bu Ali Sina Hospital, Sari,Iran.
| Name | Role | Phone | Extension | |
|---|---|---|---|---|
| Athena Sharifi Razavi | Contact | 00989113510136 | athena.sharifi@yahoo.com |
| Name | Affiliation | Role |
|---|---|---|
| monireh ghazaeian | mazandaran university of medical science | Study Director |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Bu Ali Sina hospital | Recruiting | Sari | Iran |
IPD will be shared with other researchers if asked
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| ID | Term |
|---|---|
| D009103 | Multiple Sclerosis |
| D000361 | Agammaglobulinemia |
| ID | Term |
|---|---|
| D020278 | Demyelinating Autoimmune Diseases, CNS |
| D020274 | Autoimmune Diseases of the Nervous System |
| D009422 | Nervous System Diseases |
| D003711 | Demyelinating Diseases |
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change of VZV antibody titre
| every 6 month until 18 month |
| Rate of infection | number of all infection events | during 18 month of fallow up |
| type of infection | infections in different organs | During 18 month of study |
| severity of infection events | need for hospitalization, oral or intravenous antibiotic therapy | During 18 month of study |
| D001327 | Autoimmune Diseases |
| D007154 | Immune System Diseases |
| D001796 | Blood Protein Disorders |
| D006402 | Hematologic Diseases |
| D006425 | Hemic and Lymphatic Diseases |
| D008232 | Lymphoproliferative Disorders |
| D008206 | Lymphatic Diseases |
| D007153 | Immunologic Deficiency Syndromes |