OCB-negative MS

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OCB-negative MS

Postby frodo » Tue Jun 19, 2018 5:22 am

OCB (oligoclonal bands) negative MS is rare, around 10% in patients of european ancestry, but higher outside this population. Notice that "Pattern III" MS is typically OCB-negative (https://jneuroinflammation.biomedcentra ... 017-1043-y)

Multiple Sclerosis Patients with Markedly Low Intrathecal Antibody Response in Sri Lanka

https://www.hindawi.com/journals/msi/2018/5342936/

Abstract

Multiple sclerosis (MS) is a heterogeneous disease which is poorly studied in Asia, where the disease is known to be rare with significant differences in clinical and radiological presentations and intrathecal antibody response.

Therefore the objective of this study was to determine clinical presentation, radiological and neurophysiological characteristics, and oligoclonal band status in Sri Lankan MS patients, following careful exclusion of patients with neuromyelitis optica spectrum disorders and other conditions mimicking multiple sclerosis.

Sixty-nine MS patients were recruited to the study adhering to McDonald 2010 criteria. Their clinical presentation, characteristics of central nervous system lesions in magnetic resonance imaging, visual evoked potential (VEP) results, oligoclonal bands (OCB), and AQP4 antibody status were studied. Of 69 MS patients, 54%, 6%, and 1% were relapsing remitting, secondary progressive, and primary progressive, respectively, and 39% were patients with clinically isolated syndrome.

The commonest clinical presentations were cerebral motor followed by cerebral sensory and optic neuritis. Majority had typical periventricular and infratentorial lesions in MRI. Though not clinically apparent, bilateral delay of P100 wave latency was present in 52%. OCB positivity was 42% and AQP4 antibody was positive in only one patient.

In conclusion, this group of Sri Lankan MS patients shares most of the clinical and radiological features of Caucasian MS patients. However, the OCB positivity is lower in this group, when compared to the Caucasian MS populations.
Last edited by frodo on Tue Jun 19, 2018 5:51 am, edited 1 time in total.
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Re: OCB-negative MS

Postby frodo » Tue Jun 19, 2018 5:30 am

Intrathecal, Polyspecific Antiviral Immune Response in Oligoclonal Band Negative Multiple Sclerosis

http://journals.plos.org/plosone/articl ... ne.0040431

Abstract
Background

Oligoclonal bands (OCB) are detected in the cerebrospinal fluid (CSF) in more than 95% of patients with multiple sclerosis (MS) in the Western hemisphere. Here we evaluated the intrathecal, polyspecific antiviral immune response as a potential diagnostic CSF marker for OCB-negative MS patients.
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Re: OCB-negative MS

Postby frodo » Tue Jun 19, 2018 5:35 am

CSF oligoclonal band status informs prognosis in multiple sclerosis: a case control study of 100 patients

http://jnnp.bmj.com/content/80/3/292.short

Abstract

Objective: Oligoclonal band (OCB) negative multiple sclerosis (MS) is well recognised but uncommon, studied in only a few usually small case series. These reached differing conclusions on whether its clinical features or course differ from OCB positive disease. The study hypothesis was that a definitive study would not only be of clinical and prognostic value but also potentially offer information about the possible role of CSF oligoclonal immunoglobulins in MS disease processes.

Methods: A collaborative cohort of well documented patients in southwest England and south Wales was used to identify and analyse a large group of patients with OCB negative MS and make comparisons with age and sex matched OCB positive controls.

Results: An approximate minimum 3% of patients with MS were OCB negative. They were significantly more likely to exhibit neurological or systemic clinical features atypical of MS (headaches, neuropsychiatric features and skin changes). Non-specific MRI, blood and (other) CSF abnormalities were also more common, emphasising the need for continued diagnostic vigilance, although the incautious application of McDonald diagnostic criteria in OCB negative cases renders categorisation as “definite” MS more likely. Studying the uniformly assessed Cardiff group (69 patients), we found the prognosis for neurological disability was significantly better for OCB negative cases. The age adjusted hazard ratio for OCB negative and OCB positive subjects to reach Disability Scale Status (DSS) 4 and DSS 6 was, respectively, 0.60 (95% CI 0.39 to 0.93; p = 0.02) and 0.51 (95% CI 0.27 to 0.94; p = 0.03).

Conclusion: There are clear clinical differences between OCB negative and OCB positive MS, in particular a better prognosis for disability. This is consistent with a secondary but nonetheless contributory role in disease process for intrathecally synthesised immunoglobulins.
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Re: OCB-negative MS

Postby frodo » Tue Jun 19, 2018 5:38 am

Cerebrospinal fluid oligoclonal bands in multiple sclerosis and clinically isolated syndromes: a meta-analysis of prevalence, prognosis and effect of latitude


http://jnnp.bmj.com/content/84/8/909

Abstract

Background Oligoclonal bands (OCBs) unique to the cerebrospinal fluid are used in the diagnosis of multiple sclerosis (MS). The precise prevalence of OCBs in MS and clinically isolated syndrome (CIS) is unknown. The influence of OCBs on clinical outcomes has not been quantified. OCB prevalence has been associated with latitude in a single study, if confirmed this would provide avenues for further study.

Methods Using a systematic review and meta-analysis approach, the proportion of OCB-positive MS and CIS and the influence of OCBs on clinical outcomes were calculated. The relationship between latitude and OCB prevalence was calculated using linear regression.

Results Seventy-one articles were included. Overall, 87.7% of 12 253 MS and 68.6% of 2685 CIS patients were OCB positive. OCB-positive MS patients had an OR of 1.96 of reaching disability outcomes, although a number of negative studies did not provide data. OCB-positive CIS patients had an OR of 9.88 of conversion to MS. Latitude predicted OCB status in MS patients (p=0.009) but not in CIS patients.

Conclusions This is the largest study of OCB prevalence in MS and CIS. OCB positivity strongly predicts conversion from CIS to MS. The relationship between latitude and OCBs is confirmed, and this finding warrants further investigation.
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Re: OCB-negative MS

Postby frodo » Tue Jun 19, 2018 5:40 am

Multiple sclerosis with and without CSF bands: Clinically indistinguishable but immunogenetically distinct

http://n.neurology.org/content/67/6/1062.short

Abstract

We sought to determine whether Swedish patients with multiple sclerosis (MS) with and without oligoclonal bands (OCBs) in the CSF constitute distinct subpopulations, clinically and immunogenetically. Our findings indicate that OCB-negative MS shares the same clinical features as OCB-positive MS regarding female predominance, age at onset, proportion of primary progressive cases, rate of MRI positivity, and disease severity. Our HLA-DRB1 genotyping results suggest, however, that OCB-positive and OCB-negative MS are immunogenetically distinct.
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Re: OCB-negative MS

Postby frodo » Tue Jun 19, 2018 5:49 am

A study of oligoclonal band negative multiple sclerosis.

Abstract

http://jnnp.bmj.com/content/60/1/27.short

OBJECTIVES--To determine whether oligoclonal band (OCB) negative multiple sclerosis is a reliable diagnosis and, if so, whether it has a distinctive prognosis.

METHODS--Retrospective and matched prospective comparison of the clinical and laboratory features of patients with clinical definite multiple sclerosis with and without intrathecal synthesis of oligoclonal IgG.

RESULTS--Thirty four patients were identified with apparent OCB negative clinically definite multiple sclerosis. The results of oligoclonal banding proved to have been equivocal in 14 of 34; the clinical diagnosis of multiple sclerosis was questionable in 8 of 34. The remaining 12 patients with "true" OCB negative multiple sclerosis were significantly less disabled than matched OCB positive controls. Re-examination of CSF-serum pairs from six OCB negative patients showed that three remained OCB negative while three showed evidence of intrathecal synthesis of OCBs.

CONCLUSIONS--OCB negative clinically definite multiple sclerosis is rare and should be diagnosed with caution; in unequivocal cases it seems to have a relatively benign prognosis.
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