Serum levels of matrix metalloproteinase-2, -9, and vitamin D in patients with multiple sclerosis with or without herpesvirus-6 seropositivity

ABSTRACT In recent years, extreme attention has been focused on the role of human herpesvirus-6 (HHV-6) in multiple sclerosis (MS) pathogenesis. However, the pathogenesis of MS associated with HHV-6 infection remains unknown. In this study, we measured the serum levels of matrix metalloproteinase-2 (MMP-2), matrix metalloproteinase-9 (MMP-9), and vitamin D levels in MS patients with HHV-6 infection and MS patients without HHV-6 infection. Five hundred sixty (including 300 females and 260 males) MS patients along with 560 healthy subjects were analyzed for HHV-6 seropositivity using enzyme-linked immunosorbent assay (ELISA). Subsequently, we measured the serum levels of MMP-2, MMP-9, and vitamin D levels in MS patients with HHV-6 infection and MS patients without HHV-6 infection by ELISA. About 90.7% of MS patients (508/560) were seropositive for HHV-6, while 82.3% (461/560) of healthy subjects were seropositive for this virus (p = 0.001). Moreover, there was a significant increase in the levels of MMP-2, MMP-9, and lower vitamin D in the serum samples of MS patients when compared with healthy subjects. Additionally, we demonstrated that the MMP-9 levels in seropositive MS patients were significantly higher than seronegative MS patients (p = 0.001). Finally, our results demonstrated that the mean of expanded disability status scale (EDSS) in seropositive MS patients was significantly higher in comparison to seronegative MS patients (p < 0.05). In conclusion, we suggest that the HHV-6 infection may play a role in MS pathogenesis.

Multiple sclerosis has a distinct lipid signature in plasma and cerebrospinal fluid / Esclerose múltipla tem uma assinatura lipídica distinta no plasma e no líquido cefalorraquiano

ABSTRACT The diagnosis of multiple sclerosis (MS) has changed over the last decade, but remains a composite of clinical assessment and magnetic resonance imaging to prove dissemination of lesions in time and space. The intrathecal synthesis of immunoglobulin may be a nonspecific marker and there are no plasma biomarkers that are useful in the diagnosis of MS, presenting additional challenges to their early detection. Methods We performed a preliminary untargeted qualitative lipidomics mass spectrometry analysis, comparing cerebrospinal fluid (CSF) and plasma samples from patients with MS, other inflammatory neurological diseases and idiopathic intracranial hypertension. Results Lipid identification revealed that fatty acids and sphingolipids were the most abundant classes of lipids in the CSF and that glycerolipids and fatty acids were the main class of lipids in the plasma of patients with MS. The area under the curve was 0.995 (0.912-1) and 0.78 (0.583-0.917), respectively. The permutation test indicated that this ion combination was useful for distinguishing MS from other inflammatory diseases (p < 0.001 and 0.055, respectively). Conclusion This study concluded that the CSF and plasma from patients with MS bear a unique lipid signature that can be useful as a diagnostic biomarker.

RESUMO Embora o diagnóstico da EM tenha se modificado na última década, ainda tem como requisito básico a demonstração da disseminação no tempo e no espaço, através do quadro clínico e do exame de ressonância magnética. A síntese intratecal de imunoglobulina pode ser um marcador inespecífico e não há biomarcadores plasmáticos que sejam úteis no diagnóstico da EM, impondo desafios à sua detecção precoce. Métodos Realizamos uma análise lipidômica preliminar por espectrometria de massas, não direcionada, qualitativa, comparando amostras de LCR e plasma de pacientes com EM, outras doenças neurológicas inflamatórias e hipertensão intracraniana idiopática (HII). Resultados A identificação lipídica revelou que os ácidos graxos e esfingolipídios foram as classes mais abundantes de lipídios no LCR e que glicerolipídios e ácidos graxos foram a principal classe de lipídios no plasma de pacientes com EM. A AUC foi de 0,995 (0,912-1) e 0,78 (0,583-0,917), respectivamente. O teste de permutação indicou que essa combinação de íons foi útil para distinguir a EM de outras doenças inflamatórias (p < 0,001 e 0,055, respectivamente). Conclusão Este estudo sugere que o líquido cefalorraquidiano (LCR) e o plasma de pacientes com EM possuem uma assinatura lipídica única, pode ser útil como um biomarcador diagnóstico.

Neurofilament light chain in the assessment of patients with multiple sclerosis / Neurofilamento de cadeia leve na avaliação de pacientes com esclerose múltipla

ABSTRACT Multiple sclerosis (MS) is an autoimmune, inflammatory, and degenerative disease of the central nervous system. Axonal degeneration is triggered by inflammation and is the pathological substrate of progressive disability in patients with MS. Therapeutic interventions can reduce inflammatory activity, thus delaying neurodegeneration and the progression of disability. Disease activity and neurodegeneration are assessed mainly through clinical evaluation and magnetic resonance imaging. These measures lack sensitivity and accuracy, so new biomarkers are necessary. Several markers have been studied and to date the most promising is neurofilament light (NfL), a component of the axonal cytoskeleton, which is released into cerebrospinal fluid (CSF) following axonal damage. In the present study, we review the current knowledge about CSF NfL determination in MS, clinically isolated syndrome, and radiologically isolated syndrome, and critically discuss how CSF NfL measurement may contribute to therapeutic decision-making in these patients.

RESUMO A esclerose múltipla (EM) é uma doença autoimune, inflamatória e degenerativa do sistema nervoso central. A degeneração axonal é deflagrada pelo processo inflamatório e é o substrato patológico da incapacidade na EM. As intervenções terapêuticas reduzem a inflamação retardando a neurodegeneração e a progressão da incapacidade. A neurodegeneração é avaliada pelo quadro clínico e pela ressonância magnética. Estas mensurações não suficientemente acuradas, havendo necessidade de novos biomarcadores. Diversos biomarcadores têm sido estudados e, até o presente, o mais promissor é o neurofilamento de cadeia leve (NfL). O mesmo é um componente do citoesqueleto que é liberado no líquido cefalorraquidiano após injúria axonal. No presente estudo nós revisamos o conhecimento atual acerca do NfL na EM, síndrome clinica isolada e síndrome radiológica isolada, discutindo criticamente como a determinação deste biomarcador pode contribuir na tomada de decisões clínicas.

Serological profile of John Cunningham virus (JCV) in patients with multiple sclerosis / Perfil sorológico do vírus John Cunningham (JCV) em pacientes com esclerose múltipla

ABSTRACT Treatment options for multiple sclerosis (MS) have changed over the last few years, bringing about a new category of drugs with more efficient profiles. However, these drugs have come with a whole new profile of potential adverse events that neurologists have to learn well and quickly. One of the most feared complications of these MS treatments is progressive multifocal leukoencephalopathy caused by the reactivation of the John Cunningham virus (JCV). Objective: To identify the serologic profile of JCV in patients with MS. Methods: Data on serum antibodies for JCV were obtained using the enzyme-linked immunosorbent assay provided by the STRATIFY-JCV program. Results: A total of 1,501 blood tests were obtained from 1,102 patients with MS. There were 633 patients (57.1%) who were positive for antibodies for JCV and 469 patients who were negative (42.9%). Twenty-three patients became positive after initially having negative JCV antibody status. The rate of seroconversion was 18.5% over 22 months. Conclusion: The JCV serologic profile and seroconversion in Brazilian patients were similar to those described in other countries.

RESUMO As opções terapêuticas para esclerose múltipla (EM) modificaram-se ao longo dos últimos anos, trazendo uma nova categoria de drogas com melhor perfil de eficácia. No entanto, estas drogas vieram com um novo perfil de potenciais eventos adversos que exigem que o neurologista os reconheça bem e rapidamente. Uma das complicações mais temidas destes tratamentos para a EM é a leucoencefalopatia multifocal progressiva (LEMP), causada pela reativação do vírus John Cunningham (JCV). Objetivo: Identificar o perfil sorológico de JCV em pacientes com EM. Métodos: Dados sorológicos de JCV foram obtidos através do ensaio por enzimas imuno-adsorvidas (ELISA) fornecido pelo programa STRATIFY-JCV. Resultados: Um total de 1.501 testes sanguíneos foram obtidos de 1.102 pacientes com EM. O grupo teve 633 pacientes (57,1%) soropositivos para anticorpos anti-JCV e 469 pacientes negativos (42,9%). Vinte e três pacientes se tornaram posivitos após resultados iniciais negativos para anticorpos anti-JCV. A taxa de soroconversão foi 18,5% em 22 meses. Conclusão: O perfil sorológico do JCV e a soroconversão nos pacientes brasileiros foi semelhante àquela descrita em outros países.

comparison between vitamin D level in multiple sclerosis and non-multiple sclerosis patients

Background: Multiple sclerosis [MS] is a demyelinating disease of the nervous system. Its etiology is still not well understood. Lately, attention has been increased for the relation between MS and vitamin D deficiency

Objectives: This study aims to compare vitamin D level between MS and non-MS patients looking for any significant difference

Methods: This is a retrospective cohort study held at a tertiary hospital. It compares vitamin D level between MS and non-MS patients in the period from 2010 to 2017. Vitamin D level <50 nmoI/L was considered as low while level >50nmoI/L was labelled as normal. The means of the vitamin D level were compared using the independent t-test with a p-value of 0.05 for significance level

Results: Out of the 96 MS patients, only 72 patients had their vitamin D level measured. [51 females, mean age 34.62]. In comparison with 97 non-MS patients were included in the study [65 females, mean age 37.32]. Vitamin D level mean values in the MS and non-MS patients were calculated as 38.63 and 44.09 respectively. Comparing the means showed a p-value of 0.266

Conclusion: Despite that vitamin D deficiency is known as one of the risk factors for MS, with the high prevalence of vitamin D deficiency in this region, the development of MS can be attributed to more relevant contributing factors and further studies regarding MS risk factors for our population are needed to be sought

MOG-IgG associated optic neuritis is not multiple sclerosis / Neurite óptica associada ao MOG-IgG não é esclerose múltipla

ABSTRACT Autoantibodies against myelin oligodendrocyte glycoprotein (MOG-IgG) have been reported in patients with inflammatory central nervous system disorders including isolated optic neuritis (ON). We compared our MOG-IgG ON patients with multiple sclerosis (MS) patients presenting with ON. Methods and results: Among the total of 38 patients with optic neuropathies, six patients with isolated ON were MOG-IgG positive and eight patients with ON fulfilled the diagnostic criteria for MS. All MS patients were negative for MOG-IgG using a cell-based assay. When compared with the MS group, the MOG-IgG patients were older (mean 47 years), more frequently male (ratio 2:1) and had a higher frequency of bilateral and/or recurrent ON. The brain magnetic resonance imaging of all MOG-IgG positive patients was normal or had only unspecific white matter T2 lesions. Conclusion: These findings suggest that MOG-IgG is a biomarker of an inflammatory demyelinating CNS disease distinct from MS.

RESUMO Autoanticorpos contra a glicoproteína da mielina do oligodendrócito (MOG-IgG) têm sido descritos em pacientes com neurite óptica (NO) isolada, entre outras doenças inflamatórias do sistema nervoso central. Comparamos os nossos pacientes com NO MOG-IgG positivos com pacientes com NO associada a esclerose múltipla (EM). Materias e métodos: De um total de 38 pacientes com neuropatia óptica, seis foram MOG-IgG positivos e oito preencheram critérios diagnósticos para EM. Todos os pacientes com EM foram negativos para MOG-IgG (ensaio baseado em células). Quando comparados ao grupo com EM, os pacientes MOG-IgG positivos apresentam idade mais avançada (mediana de 47 anos) e tiveram uma frequência maior de NO bilateral e/ou recorrente. Houve predomínio masculino (relação 2:1). A ressonância magnética de encéfalo de todos os pacientes MOG-IgG positivos foi normal ou demonstrou apenas lesões inespecíficas em T2. Conclusão: Nossos achados sugerem que o MOG-IgG é um biomarcador de doença desmielinizante diferente da EM.

No correlation was observed between vitamin D levels and disability of patients with multiple sclerosis between latitudes 18° and 30° South / Não foi observada correlação entre os níveis séricos de vitamina D e a incapacidade em pacientes com esclerose múltipla entre as latitudes Sul 18° e 30°

ABSTRACT Objective: Vitamin D has taken center stage in research and treatment of multiple sclerosis (MS). The objective of the present study was to assess the serum vitamin D levels of a large population of patients with MS and controls living in a restricted tropical area. Methods: Data from 535 patients with MS and 350 control subjects were obtained from 14 cities around the Tropic of Capricorn. Results: The mean serum 25-OH vitamin D level was 26.07 ± 10.27 ng/mL for the control subjects, and 28.03 ± 12.19 ng/mL for patients with MS. No correlation was observed between vitamin D levels and the disability of patients over the disease duration. Conclusion: At least for the region around the Tropic of Capricorn, serum levels of vitamin D typically are within the range of 20 to 30 ng/mL for controls and patients with MS.

RESUMO Objetivo: Vitamina D assumiu um papel central na pesquisa e tratamento da esclerose múltipla (EM). O objetivo deste estudo foi avaliar os níveis séricos de vitamina D de pacientes com EM e controles que residem em uma área tropical. Métodos: Foram analisados dados de 535 pacientes com EM e 350 indivíduos controle em 14 cidades próximas ao Trópico de Capricórnio. Resultados: O valor médio da determinação de 25-OH vitamina D foi 26,07 ± 10,27 ng/mL para controles e 28,03 ± 12,19 ng/mL para pacientes com EM. Não houve correlação entre os níveis de vitamina D e o grau de incapacidade ao longo da duração da doença. Conclusão: Pelo menos na região que cerca o Trópico de Capricórnio, os níveis séricos de vitamina D estão entre valores de 20 a 30 ng/mL tanto para controles quanto para pacientes com EM.

Novel mutations identified in EIF2B5 gene in Kashmiri patients as susceptibility factor for multiple sclerosis.

White matter disease refers to a set of diseases that affect the white matter of the brain and all of which have different consequences on brain function. Most of the studies have shown that it results from the defects during protein synthesis, with the gene defects in EIF2B1–5, encoding the five subunits of eukaryotic translation initiation factor 2B (eIF2B) α, β, γ, δ and ε, respectively. eIF2B plays a crucial role in protein translation and its regulation under different conditions. The previous studies have shown that mutations in five subunits of eIF2B cause white matter disease of the brain and thus EIF2B is the main culprit in development of white matter disease. In this study, the mutational screening of EIF2B5 gene encoding eIF2Bε was performed for the first time in 12 Kashmiri patients, each having a unique white matter disease condition. We found two novel missense mutations in EIF2B5: c.580A>G, p.Thr194Ala and c.611C>T, p.Ala204Val among the patients with demyelinating disease (multiple sclerosis), but no mutation was found in other patients. In conclusion our study suggests involvement of the EIF2B5 gene in MS development, thus suggesting p.Thr194Ala to be a susceptibility factor for the development of multiple sclerosis.

Vitamin D[3] concentration correlates with the severity of multiple sclerosis

To investigate the possible association between serum 25[OH] vitamin D[3] concentration and the severity of disease in Iranian patients with multiple sclerosis [MS] and to compare this concentration with a matched control group. This was an analytical cross sectional study performed at Jondishapour Neurology Clinic in Tehran, Iran. Patients with relapsing- remitting MS were categorized by disease severity: mild [0

[Effect of the sera of patients with multiple sclerosis on apoptosis and nitric oxide production of endothelial cells]

Multiple sclerosis [MS] is one of the chronic autoimmune diseases of the central nervous system with unknown etiology. The present study aimed to investigate the apoptosis and nitric oxide [NO] production of endothelial cells treated with serum of patients with MS and response to interferon beta [IFN- beta] therapy. Human umbilical vein endothelial cells were treated with sera from patients with active MS [in relapse], MS in remission, or sera from healthy volunteers [each n = 10]. Nitric oxide [NO] levels were determined in culture supernatants by Greiss method and endothelial cell apoptosis was assessed by annexin V-propidium iodide staining. Effects of IFN-beta-1b on endothelial cell apoptosis and NO production were tested at increasing doses [10, 100, and 1000 U/ml]. Compared with healthy people, only apoptosis of endothelial cells treated with serum of patients with relapsing phase increased, P<0.01; while there was no significant difference between apoptosis of endothelial cells treated with serum of patients in remission phase and healthy controls. Apoptosis of endothelial cells treated with sera of patients in relapse was decreased by IFN-beta-1b at 10 U/ml, P<0.05. The same dose also led to a significant increase in nitric oxide production. The results suggest that endothelial cells injury and apoptosis may play a role in MS etiology and represents a potential therapeutic mechanism of action for IFN-beta-1b in MS therapy

Levels of myelin basic protein and its antibodies in the serum of the patients with neurological disease [autism, multiple sclerosis]

Myelin basic protein [MBP] is an important part of myelin sheets, and it's breakdown plays an important role in many nervous diseases, and it was thought that the destruction of MBP occur by the formation of MBP antibodies. So the aim of our study is to detect the differences of MBP and MBP-Abs levels between the patients with multiple sclerosis [MS], autism and epilepsy and apparently healthy controls. the study group involved 92 samples [32 patients with autism, 19 patients with MS, 20 patients with epilepsy, 21 controls], and the determination of MBP and MBP-Abs was achieved by the enzyme-linked immune sorbent assay [ELISA]. the ratio of MBP was higher in the patients with MS [53%], and autism [31%] than the patients with epilepsy [10%], and healthy control [5%]. the ratio of MBP-Abs was higher in the patients with MS [36%], and autism [38%] than the patients with epilepsy [15%] and healthy control [5%]. The presence of MBP or MBP-Abs in the patient's serum indicate to the presence of autoimmune problem and may help to direct the treatment

C3c intrathecal synthesis evaluation in patients with multiple sclerosis

INTRODUCTION: Multiple sclerosis (MS) is a chronic, inflammatory and progressive disease of the central nervous system in which local inflammatory injuries of the brain white matter appears, being the most outstanding feature the myeline loss (demyelination). OBJECTIVE: To determine if the complement system might be involved in the MS immunopathogeny favouring the mechanism intervening in the myelin destruction. METHOD: Samples of sera and CSF from twelve patients with a diagnosis of MS obtained at the moment of the admission to the hospital at the beginning of the break out, were collected. Levels of C3c and albumin in sera and in CSF were quantified using radial immunodiffusion plates. RESULTS: High values over 80 percent of intrathecal synthesis were obtained except in one of the patients. CONCLUSION: Intrathecal synthesis of C3c and its liberation to the CSF means that the activation of the complement system in any of the two ways has taken place, and that once performed its biological functions, has suffered a degradation process.

INTRODUCCION: La esclerosis múltiple (EM) es una enfermedad crónica, inflamatoria y progresiva del sistema nervioso central que cursa con la aparición de lesiones inflamatorias focales en la sustancia blanca cerebral, en las que lo más llamativo es la pérdida de mielina (desmielinización). OBJETIVO: Conocer si el sistema de complemento puede estar involucrado en la inmunopatogenia de la EM favoreciendo los mecanismos que median la destrucción de la mielina. MÉTODO: Se colectaron muestras de suero y LCR de doce pacientes con diagnóstico de EM obtenidas en el momento del ingreso al inicio del brote. Se cuantificaron los niveles de C3c y albúmina en suero y en LCR en placas de inmunodifusión radial. RESULTADOS: Se obtuvieron altos valores que superan el 80 por ciento de síntesis intratecal, menos en uno de los pacientes. CONCLUSION: La síntesis intratecal de C3c y su liberación al LCR significa que ha sucedido la activación del sistema de complemento en alguna de las dos vías y que una vez cumplidas sus funciones biológicas, ha sufrido un proceso de degradación y liberación al LCR en forma de C3c.

Esclerose múltipla: correlaçäo clínico-laboratorial / Multiple sclerosis: clinical and laboratorial correlation

Aspectos clínicos e demográficos de 86 pacientes com o diagnóstico de esclerose múltipla (EM) forma clinicamente definida foram comparados aos achados do líquido cefalorraqueano. Do grupo total 30 por cento encontrava-se em surto, 41 por cento em remissäo e 29 por cento na forma crônica progressiva. Os pacientes com a forma crônica progressiva apresentavam índice de IgG sugestivo de imunoliberaçäo intratecal em 76 por cento dos casos, enquanto que aumento deste parâmetro foi observado em apenas 46 por cento e 49 por cento, das formas em surto e remissäo, respectivamente (p<0,005). Os dados obtidos no estudo quantitativo da síntese intratecal de IgG contribuem para a demonstraçäo de diferenças imunológicas entre ambas as formas de EM, surto-remissäo e crônica progressiva. O uso de corticóides reduz quantitativamente a síntese intratecal de IgG mas näo a síntese de bandas oligoclonais

Multiple sclerosis in Brazil: analisys of cerebrospinal fluid by standard methods

The demonstration of intrathecal IgG synthesis has been used as an important laboratory parameter to support the diagnosis of multiple sclerosis (MS). The Committee for European Concerted Action for Multiple Sclerosis has recommended a protocol for the assessment of intrathecal IgG synthesis. We applied this methodology to determine the cerebrospinal (CSF) profile of 128 Brazilian patients with MS. We detected hypercytosis lower than 35 cells/mm3 in 97 per cent, protein lower than 80mg/dl in 99 per cent, normal blood-CSF barrier function in 76 per cent, increased IgG local production around 53 per cent and oligoclonal IgG bands by isoelectric focosing in 85 per cent of the definite MS patients. The diagnostic accuracy of the quantitative analysis was lower than the qualitative. The detection of oligoclonal bands was especially important in the cases of normal quantitative assays of IgG. In addition, we found a lower frequency of inflammatory reaction in CSF in our MS cases, in comparison to some European studies.

Effect of P53 antibodies, interleukin-10, platelet derived growth factor and nitric oxide on apoptosis in discoid and systemic lupus erythematosus and systemic sclerosis

This study included seventy patients with systemic lupus erythematosus [SLE, twenty-five patients], systemic sclerosis [SSc, twenty-five patients] and discoid lupus erythematosus [DLE, twenty patients]. The study also included fifteen healthy subjects of comparable age as controls. P53 antibodies were detected in 32% of SLE, 20% SSc and 10% of DLE patients, while they were undetectable in sera of the controls. Serum IL-10, PDGF and NO were significantly higher in SLE, SSc and DLE compared with controls [except for PDGF in DLE]. NO and PDGF were significantly higher in SLE than either SSc or DLE patients. Circulating P53 antibodies were significantly correlated with IL-10, PDGF and NO in all studied groups of patients. Only in SLE patients, disease activity score significantly correlated with the studied bioindices except IL-10. From the revealed results, patients with SLE, SSc and DLE had changes in the aforementioned biochemical factors which might had a role in the defective apoptotic process which occurs in these autoimmune diseases

The value of csf analysis for the differential diagnosis of HTLV-I associated myelopathy and multiple sclerosis

Amostras do líquido cefalorraquidiano (LCR) e soro de 17 pacientes brasileiros com HAM/TSP, seis com esclerose múltipla e seis com epilepsia idiopática (controle nao-inflamatório) foram analisadas para a presença de anticorpos para o vírus de sarampo, rubéola, varicela zoster e herpes simples pelo método de ELISA. Todos os casos de HAM/TSP e esclerose múltipla tinham resposta imune poliespecífica intratecal para sarampo e rubéola. Anticorpos específicos para sarampo e rubéola (resposta MRZ) foram observados em todos os pacientes com esclerose múltipla, mas nao nos controles com epilepsia idiopática. A relevância das respostas poliespecífica e monoespecífica é discutida para essas doenças neurológicas crônicas.

Aumento dos receptores solúveis da interleucina-2 na esclerose múltipla / Increase of interleukin-2 soluble receptors in multiple sclerosis: preliminary study in 26 patients

Em 26 pacientes com diagnóstico definido de esclerose múltipla foram colhidas amostras de sangue e pesquisados os receptores solúveis de interleucina-2 (RsIL-2). Para tal os pacientes foram dividios em dois grupos: um constituído de 14 pacientes emsurto da doença e o outro com 12 pacientes em remissäo da moléstia. Além destes, procedeu-se a colheita de material para a mesma pesquisa em 8 pacientes com outras doenças neurológicas. Os resultados demonstraram aumento dos RsIL-2 em 50 por cento dos casos do grupo de pacientes em surto da doença, fato näo observado nos demais pacientes dos demais grupos. Estes resultados confirmam a hipótese da ativaçäo de células T em pacientes em surto de esclerose múltipla, corroborando a hipótese da existência de um desiquilíbrio imunológico na doença

Epilepsia como manifestación de esclerosis múltiple: a propósito de un caso / Epilepsy as multiple sclerosis manifestation: a proposal of a case

Esclerosis múltiple es una enfermedad infrecuente en latitudes similares al Perú, su inicio es raro en menores de 10 años y la presentación en crisis convulsivas es excepcional. Se describe un caso iniciado a los 8 años y se revisa la literatura al respecto.

Anticorpos para componentes do sistema nervoso central em pacientes com esclerose múltipla crônica / Antibodies for components of the central nervous system in pacients with chronic multiple sclerosis

Esclerose múltipla (EM), uma doença inflamatória desmielinizante do sistema nervoso central , caracteriza-se pela destruiçäo total ou parcial dos componentes do sistema nervoso central, caracteriza-se pela destruiçåo total ou parcial dos componentes do sistema nervoso associado à mielina. A técnica de enzima imunoensaio (ELISA) foi utilizada para detecçåo pareada, no soro e líquido cefalorraquidiano (LCR), de auto-anticorpos para a proteína básica da mielina (PBM) e componentes lipídicos presentes na fraçåo VII (F-VII) do extrato de cérebro. Foram estudados 25 pacientes com esclerose múltipla na forma crônica. O grupo controle foi constituído por 26 doadores do banco de sangue e 10 pacientes com miastenia grave. Independente do aspecto evolutivo da doença, todos os pacientes com esclerose múltipla apresentavam níveis elevados de anticorpos para a F-VII no LCR, porém, somente 68 por cento apresentavam níveis elevados de auto-anticorpos para PBM. Os anticorpos séricos para PBM e V-II encontram-se geralmente-se em níveis abaixo daqueles observados no LCR correspondente. Os resultados sugerem que, além da proteína básica da mielina, os componentes líquidos presentes na F-VII do extrato de cérebro parecem desempenhar um papel importante na manutençåo da resposta imune local e na progressåo do processo desmielinizante em pacientes na forma crônica da esclerose múltipla