Humoral Immunity In Multiple Sclerosis

  1. B-Cell Immunity in MS
    Int MS J 2003 Dec;10(4):110-20

  2. AntiBodies against Myelin Oligodendrocyte Glycoprotein in the CerebroSpinal Fluid of Multiple Sclerosis patients
    J Neurol Sci 2003 Jul 15;211(1-2):67-73

  3. Intrathecal B-Cell clonal expansion, an early sign of Humoral Immunity, in the CerebroSpinal Fluid of patients with Clinically Isolated Syndrome suggestive of Multiple Sclerosis
    Lab Invest 2003 Jul;83(7):1081-8

  4. Skewed AutoAntiBody reactivity to the extracellular domain of Myelin Oligodendrocyte Glycoprotein in Multiple Sclerosis
    Immunology 2002 Dec;107(4):403-10

  5. Expansion of CD5 - B-Cells in Multiple Sclerosis correlates with CD80 (B7-1) expression
    Scand J Immunol 2002 Jul;56(1):101-7

  6. OligoClonal Bands and AntiBody responses in Multiple Sclerosis
    J Neurol 2002 Apr;249(4):375-89

  7. Molecular Immunologic strategies to identify Antigens and B-Cell Responses unique to Multiple Sclerosis
    Arch Neurol 2001 Jan;58(1):43-8

  8. Multiple Sclerosis: use of light-chain typing to assist diagnosis
    Ann Clin BioChem 2001 May;38(Pt 3):235-41

  9. Intrathecal OligoClonal and PolySpecific Immune Response in Multiple Sclerosis
    Rev Neurol 2001 Nov 1-15;33(9):809-11

  10. Intrathecal IgG synthesis and AutoAntiBody-secreting cells in Multiple Sclerosis
    J NeuroImmunol 2000 Aug 1;108(1-2):207-15

  11. Cross-reactive idiotypy in CerebroSpinal Fluid ImmunoGlobulins in Multiple Sclerosis
    Ann Neurol 2000 Jan;47(1):87-92


B-Cell Immunity In MS

Qin Y, Duquette P
Int MS J 2003 Dec;10(4):110-20
University of California, Department of Neurology, Irvine, CA, USA
PMID# 14977487

T-Cell-Mediated Immunity has dominated studies of Multiple Sclerosis (MS) pathogenesis, mainly due to detection of activated T-Cells in MS lesions, and analogies with the animal model Experimental Allergic Encephalomyelitis.

The prevailing Etiological hypothesis is that MS is a multifactorial disorder, affecting individuals predisposed by a combination of susceptibility Genes and environmental factors.

Plaque formation is attributed to Immune mechanisms, triggered by an AutoImmune attack directed against Antigens in the Myelin membrane.

This article reviews the roles of components of the Immune Response in MS including B-Cells, the Complement Cascade, AntiBodies and Genes.

Evidence suggests that B-Cell clonal expansion in CerebroSpinal Fluid and plaques of MS patients indicate an ongoing, Antigen-driven response in the Central Nervous System.

That MS is an AutoImmune Disease remains inconclusive, but the assumption is that Humoral Immunity plays a role in Lesion formation and perpetuation, or is involved in tissue-repair mechanisms.

The paradigm of MS as a T-Cell Disease must be revisited, as B-Cells are involved during the initial and later disease stages, and evidence is mounting for a 'degenerative process', in addition to (and possibly even preceding) Inflammation.


AntiBodies Against Myelin Oligodendrocyte Glycoprotein In The CerebroSpinal Fluid Of Multiple Sclerosis Patients

Markovic M, Trajkovic V, Drulovic J, Mesaros S, Stojsavljevic N, Dujmovic I, Mostarica Stojkovic M
J Neurol Sci 2003 Jul 15;211(1-2):67-73
University of Belgrade, Institute of MicroBiology and Immunology, School of Medicine, Dr. Subotica 1, Belgrade 11000, Yugoslavia
PMID# 12767500

AntiBodies against Myelin Oligodendrocyte Glycoprotein (MOG) mediate DeMyelination in Experimental Autoimmune Encephalomyelitis (EAE) in different animal species and are implicated in the ImmunoPathogenesis of Multiple Sclerosis (MS).

In order to evaluate the AntiMOG response, we have analyzed the CerebroSpinal Fluids (CSFs) from 44 MS patients and 51 controls, 11 with Other Inflammatory Neurological Disorders (OIND) and 40 with Non-Inflammatory Neurological Disorders (NIND).

The frequency of Anti-MOG AntiBodies positive patients in the MS group (30%) was significantly higher compared to the NIND (8%, p=0.02), but not compared to the OIND group (55%, p=0.228).

Interestingly, all six patients with NeuroSarcoidosis had MOG-specific AntiBodies in their CSF. Frequency of Anti-MOG AntiBodies was similar in patients with clinically active and stable MS (32% and 26%, respectively; p=0.921).

However, in clinically active MS patients, AntiBody Titers were higher in comparison with patients with stable disease, although the difference did not reach the level of statistical significance (p=0.06).

These results further support the potential role of Anti-MOG AntiBodies in the ImmunoPathology of MS in the subset of patients with this disease.

Furthermore, our findings suggest for the first time that Anti-MOG AntiBodies could be an accessory diagnostic tool in NeuroSarcoidosis.


Intrathecal B-Cell Clonal Expansion, An Early Sign Of Humoral Immunity, In The CerebroSpinal Fluid Of Patients With Clinically Isolated Syndrome Suggestive Of Multiple Sclerosis

Qin Y, Duquette P, Zhang Y, Olek M, Da RR, Richardson J, Antel JP, Talbot P, Cashman NR, Tourtellotte WW, Wekerle H, Van Den Noort S
Lab Invest 2003 Jul;83(7):1081-8
University of California Irvine, Department of Neurology, Irvine, California 92697, USA
PMID# 12861047

The development of somatically mutated Memory and Plasma B-Cells is a consequence of T-Cell-dependent Antigen-challenged Humoral Immunity.

To investigate the role of B-Cell-mediated Humoral Immunity in the initiation and evolution of Multiple Sclerosis (MS), we analyzed Ig variable heavy chain genes of Intrathecal B-Cells derived from patients with a first clinical manifestation suggestive of MS.

Sequences of Ig variable regions showed that B-Cells in the CerebroSpinal Fluid from most of these patients were clonally expanded and carried somatic hypermutated variable heavy chain genes.

The mutations showed a high replacement-to-silent ratio and were distributed in a way suggesting that these clonally expanded B-Cells had been positively selected through their Antigen Receptor.

In comparison, Intrathecal B-Cell clonal expansion often precedes both OligoClonal IgG Bands and multiple Magnetic Resonance Imaging lesions.

Clinical follow-up study showed that patients with clonally expanded Intrathecal B-Cells had a high rate of conversion to Clinically Definite MS.

The findings provide direct evidence of recruitment of germinal center differentiated B-Lymphocytes into the Central Nervous System during the initiation of MS.

These results indicate B-Cell-mediated Immune Response in the CerebroSpinal Fluid is an early event of inflammatory reaction in the Central Nervous System of MS.

This procedure also provides a more sensitive method to evaluate the association of Humoral Immunity in the evolution of MS.


Skewed AutoAntiBody Reactivity To The Extracellular Domain Of Myelin Oligodendrocyte Glycoprotein In Multiple Sclerosis

Tejada-Simon MV, Hong J, Rivera VM, Zhang JZ
Immunology 2002 Dec;107(4):403-10
Baylor College of Medicine, Multiple Sclerosis Research Unit, Baylor-Methodist Multiple Sclerosis Center and Department of Neurology, Houston, Texas 77030, USA
PMID# 12460184

Myelin Oligodendrocyte Glycoprotein (MOG) is found to induce both AutoReactive T-Cell and AntiBody responses associated with DeMyelinating pathology and is implicated in the pathogenesis of Multiple Sclerosis (MS).

In this study, we addressed the potential association of Anti-MOG Immune Responses with MS by examining, comparatively, both the T-Cell and AntiBody responses to recombinant MOG fragments in MS patients and healthy subjects.

T-Cells recognizing MOG were detected in MS patients as well as in healthy subjects, and their precursor frequency in the blood was not increased in patients with MS.

MOG-reactive T-Cells isolated from both MS patients and healthy subjects exhibited a similar Cytokine profile, producing InterLeukins (IL-4, IL-10) and Tumour Necrosis Factor (TNF), but not Interferon-gamma (IFN-γ).

And, recognized predominantly the ExtraCellular (residues 1-60) and the Transmembrane/Cytoplasmic (residues 154-218) domains of MOG.

In contrast, Anti-MOG AntiBodies derived from MS patients displayed a skewed reactivity pattern, even though the occurrence and Titers of Serum Anti-MOG AntiBodies were only slightly elevated in MS patients.

MS-derived AutoAntiBodies were predominantly directed at the 1-60 region of MOG, while naturally occurring AntiMOG AntiBodies derived from healthy individuals reacted selectively to the 154-218 domain.

These differences were statistically significant.

The findings of this study are consistent with the presence of Anti-MOG AntiBodies within DeMyelinating Lesions of MS and their role in the induction of DeMyelinating pathology in animal models.

The study has important implications in the understanding of the AutoImmune processes in MS.


Expansion Of CD5 - B-Cells In Multiple Sclerosis Correlates With CD80 (B7-1) Expression

Sellebjerg F, Jensen J, Jensen CV, Wiik A
Scand J Immunol 2002 Jul;56(1):101-7
University of Copenhagen, Department of Neurology, Glostrup Hospital, Denmark
PMID# 12100477

The pathogenetic role of AutoAntiBodies in Multiple Sclerosis (MS) is uncertain. CD5+ B-Cells commonly produce AutoAntiBodies, but CD5 expression has also been implicated in B-Cell Tolerance.

We studied B-Cell subsets, AntiMyelin protein AntiBody-secreting cells in CerebroSpinal Fluid (CSF) and a panel of serum AutoAntiBodies in patients with Clinically Isolated Syndromes (CIS), suggestive of MS and patients with Clinically Definite MS (CDMS).

Patients with CDMS had a higher percentage of CD5- B-Cells in CSF than did control subjects (P = 0.02).

CIS patients with ImmunoGlobulin G (IgG) OligoClonal Bands in CSF or multiple lesions on Magnetic Resonance Imaging (MRI) had a higher percentage of CD5- B-Cells in CSF than did the remaining CIS patients (P = 0.03).

The percentage of CD5- and CD80+ B-Cells correlated positively and the percentage of CD5+ B-Cells correlated negatively with the number of CSF cells secreting AntiMyelin Basic Protein (Anti-MBP) AntiBodies.

The prevalence of Serum autoAntiBodies was comparable in the three patient groups.

We conclude that Intrathecal expansion of CD5- B-Cells appears to be more characteristic in MS patients, and CD5+ B-Cells may be associated with a lower prevalence of AntiMyelin AntiBody production.


OligoClonal Bands And AntiBody Responses In Multiple Sclerosis

Correale J, de los Milagros Bassani Molinas M
J Neurol 2002 Apr;249(4):375-89
Instituto de Investigaciones Neurologicas, Departmento de Neurologia, Dr Raul Carrea, Buenos Aires, Argentina
PMID# 11967640

Multiple Sclerosis (MS) is an Inflammatory Disease of the Central Nervous System with multifocal areas of DeMyelination.

Although its Etiology and Pathogenesis remain controversial, several lines of evidence indicate that MS is mediated by a misdirected Immune Response against one or several Myelin proteins.

The involvement of diverse Leukocyte subsets and their products in MS is still the subject of considerable debate.

The emphasis on T-Cells has derived mainly from the detection of activated T-Cells in MS Plaques and analogies with animal models of MS. Because of these observations Cell-Mediated Immunity has dominated the research field of MS to this day.

However, in recent years the role of B-Cells, Plasma Cells and ImmunoGlobulins in MS have been re-examined, and current findings indicate that Humoral Immunity also plays a major role in disease pathogenesis.

B-Cells and their products could exert several potential effects during the course of MS.

Firstly, AutoAntiBodies against specific Myelin Antigens could mediate damage to Myelin membranes.

Secondly, some studies suggest that natural AutoAntiBodies could enhance ReMyelination.

Thirdly, AntiBodies directed against Myelin components can participate in AntiIdiotypic Networks, which may regulate the course of MS.

Increased Intrathecal ImmunoGlobulin synthesis reflected by raised IgG indices and an OligoClonal pattern is the most common abnormality detected in MS patients.

The introduction of more sensitive procedures for protein detection has allowed demonstrating OligoClonal Bands (OCBs) in up to 95 % of patients with Clinically Definite MS.

Although the presence of OCBs in CSF of MS patients is now well established as a sensitive laboratory test to support the clinical diagnosis, OCBs may be present in other disorders, including those not directly related to infection or abnormal Immune Response.

Nevertheless, the pathogenesis of OCBs in MS is still obscure, and despite extensive research their Antigenic target(s) have yet to be established.

Therefore, a critical task is to identify the specificity of such target(s), thus providing significant clues about MS Etiology.

For this purpose, novel Molecular Immunologic Strategies have been recently developed to offer alternative approaches to identify putative Antigens recognized by AntiBodies present in MS patients.

The elucidation of the mechanisms and target(s) responsible for the onset of MS has obvious implications for the further development of specific therapies.


Molecular Immunologic Strategies To Identify Antigens And B-Cell Responses Unique To Multiple Sclerosis

Gilden DH, Burgoon MP, Kleinschmidt-DeMasters BK, Williamson RA, Ghausi O, Burton DR, Owens GP
Arch Neurol 2001 Jan;58(1):43-8
University of Colorado Health Sciences Center, Department of Neurology, 4200 E Ninth Ave, Mail Stop B182, Denver, CO 80262, USA
PMID# 11176935

Identification of the causative agent of Multiple Sclerosis (MS) has long eluded investigators and has become the "Holy Grail" of researchers in the field.

The Immune Response in CerebroSpinal Fluid of patients with MS, indicated by an increased IgG level and the presence of specific OligoClonal Bands after ElectroPhoresis, strongly parallels that found in various infectious diseases of the Central Nervous System.

To understand the nature of B-Lymphocyte activation in MS, 4 laboratories studied the Antigen-Binding regions of AntiBodies found in MS Brain DeMyelinative plaques and CerebroSpinal Fluid.

    Each analysis revealed:
  1. Limited germline expression
    • Results not expected for a random Bystander Response
  2. Features consistent with a specific Antigen-targeted process
  3. The clonal expansion of populations of B-Lymphocytes in MS

The screening of libraries expressing protein products derived from chronic MS Plaque messenger RNA with AntiBodies purified from plaques, CerebroSpinal Fluid, or Serum of patients with MS has thus far not revealed the antigenic target(s) of the MS AntiBody Response.

Because putative MS Antigens could be in low abundance, the screening of large libraries of random Peptides expressed on phage surfaces might offer an alternative approach to identify Peptide sequences recognized by MS AntiBodies.

New sophisticated molecular Immunologic techniques described herein should enhance our ability to identify putative Antigen(s) targets in MS.


Multiple Sclerosis: Use Of Light-Chain Typing To Assist Diagnosis

Jenkins MA, Cheng L, Ratnaike S
Ann Clin BioChem 2001 May;38(Pt 3):235-41
Austin and Repatriation Medical Centre, Division of Laboratory Medicine, Heidelberg, Victoria, Australia
PMID# 11392498

Although the presence of OligoClonal IgG with abnormal kappa/lambda light-chain ratio in Multiple Sclerosis (MS) has been known for many years, this finding has not been put to diagnostic use in most routine clinical laboratories.

In a retrospective study we report differences in the OligoClonal Banding patterns between Multiple Sclerosis and non-MS patients.

We had sufficient CerebroSpinal Fluid (CSF) on 36 from 71 patients with OligoClonal Bands for ImmunoFixation for kappa and lambda light chains, and for free kappa and free lambda.

Thirteen out of 14 patients with clinically confirmed MS had predominantly IgG (kappa) banding. In contrast, in seven out of eight patients with diagnoses other than MS the IgG was linked to both kappa and lambda light chains in approximately equal proportions.

Nine out of 14 patients with Probable/Possible/Suspected MS showed predominantly IgG (kappa) banding; five others in this group had both IgG (kappa) and IgG (lambda) and free lambda light chains.

The finding of IgG (kappa) Bands in CSF samples with OligoClonal Bands supports a diagnosis of MS.


Intrathecal OligoClonal And PolySpecific Immune Response In Multiple Sclerosis

Robinson Agramonte MA, Reiber H, Dorta Contreras AJ, Hernandez Diaz E
Rev Neurol 2001 Nov 1-15;33(9):809-11
Centro Internacional de Restauracion Neurologica (CIREN), Departamento de NeuroInmunologia; La Habana, 11300, Cuba
PMID# 11784982

The Intrathecal response of IgG, is the most frequent NeuroPathological Sign in Multiple Sclerosis (MS) patients beside the detection of OligoClonal IgG Bands in CerebroSpinal Fluid (CSF).

At the same time the observation of an Intrathecal AntiBody synthesis (AntiBody Index) 1.4) against NeuroTropic Viruses like Measles, Rubella, Varicella Zoster or Herpes Simplex shows a higher frequency in MS than any other chronic disease (MRZH reaction).

We report the Intrathecal, polyspecific and OligoClonal Immune Response in patients with definitive MS.

Patients And Methods
CSF and Serum were tested for Albumin, IgG, IgM and IgA by standard ImmunoChemical Nephelometry assay while Virus specific AntiBodies in CSF and Serum samples were evaluated by ELISA and calculated as AntiBody index.

OligoClonal IgG by, isoelectric focusing was detectable in all patients. A differential pattern of combined AntiBody index against NeuroTropic Virus was observed.

The largest frequency of a single species in the OligoClonal Immune Response was for Measles AntiBodies, while the AntiBody response was found as a combination with increased Rubella AntiBody index and VZ AntiBody index, respectively.

Our results although preliminary for our country, enrich the criteria about that MRZH reaction provide a major NeuroImmunological support to MS diagnosis.


Intrathecal IgG Synthesis And AutoAntiBody-Secreting Cells In Multiple Sclerosis

Sellebjerg F, Jensen CV, Christiansen M
J NeuroImmunol 2000 Aug 1;108(1-2):207-15
University of Copenhagen, Department of Neurology, Glostrup Hospital, 57 Nordre Ringvej, DK-2600 Glostrup, Copenhagen, Denmark
PMID# 10900355

We studied Intrathecal IgG synthesis and AutoAntiBody-secreting cells in 148 patients with Possible Onset Symptoms of MS (POSMS) or Clinically Definite MS (CDMS).

In POSMS Intrathecal synthesis of IgG OligoClonal Bands and abnormalities on T2-weighted Magnetic Resonance Imaging were associated but the former were more prevalent.

The CerebroSpinal Fluid (CSF) Leukocyte count and the number of AntiProteoLipid Protein AntiBody-secreting cells in CerebroSpinal Fluid (CSF) correlated with disease activity in POSMS.

Intrathecal IgG synthesis levels and the number of Anti-Myelin Basic Protein AntiBody-secreting cells in CSF correlated with disease activity in CDMS.

Our results support recent reports of pathogenetic heterogeneity and a pathogenetic role of the AntiBody response in MS.


Cross-Reactive Idiotypy In CerebroSpinal Fluid ImmunoGlobulins In Multiple Sclerosis

LaGanke CC, Freeman DW, Whitaker JN
Ann Neurol 2000 Jan;47(1):87-92
Neurology and Research Services of the Birmingham Veterans Medical Center, AL, USA
PMID# 10632105

The presence of OligoClonal Bands in CerebroSpinal Fluid (CSF) in Multiple Sclerosis (MS) indicates a restricted heterogeneity of ImmunoGlobulin (Ig).

The portion of Myelin Basic Protein encompassing residues 80-96 contains Epitopes frequently recognized by T and B-Cells of MS patients.

To define further this restricted heterogeneity and to direct further efforts to identify an antigenic target of CSF OligoClonal Bands.

The presence of Idiotope (Id)-bearing AntiBodies sharing an Id with a murine MonoClonal AntiBody to Myelin Basic Protein Peptide 80-89 was examined in the CSF of MS patients.

CSF samples from 57 patients with Clinically Definite MS and 45 patients with Other Neurological Diseases were standardized for amount of IgG and analyzed by ImmunoBlotting for detection of Id-bearing AntiBodies.

    Id-bearing Ig was detected in the CSF of 79% of MS patients and 16% of Other Neurological Disease patients. Further statistical analysis revealed:
  1. 84% Specificity
  2. 86% Positive predictive value
  3. 76% Negative predictive value of the test
  4. The probability a positive screening result indicated MS was 81%

Thus, AntiBodies containing a cross-reactive Id are present preferentially in the CSF of patients with MS compared with those with Other Neurological Diseases.

An Immune Network that has limited V region gene usage likely exists in the CSF and Central Nervous System of patients with MS and may provide evidence about Antigens relevant to the pathogenesis of MS.

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