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Modelling paraneoplastic CNS disease: T-cells specific for the onconeuronal antigen PNMA1 mediate autoimmune encephalomyelitis in the rat.

Antibodies directed against onconeuronal antigens provide a specific diagnostic marker for paraneoplastic neurological syndromes (PNS) and suggest that these autoantigens are targeted during disease pathogenesis. However, so far attempts to generate autoimmune models of PNS have been unsuccessful. Here we show that the adoptive transfer of T-cells specific for the autologous onconeuronal antigen Pnma1 cause encephalomyelitis in the Dark Agouti (DA) rat. The sequence of rat Ma1 (rPnma1) was determined by RT-PCR using primers for human PNMA1, followed by 5' and 3' genome walking. Rat Pnma1 is 93…

Acute disseminated encephalomyelitis (ADEM) or ADEM-like inflammatory changes in a heart-lung transplant recipient: a case report.

Acute disseminated encephalomyelitis (ADEM) is a white matter inflammatory disease which usually follows a viral infection or pharmaceutical intervention. We describe a case of presumed ADEM in a heart/lung transplant patient, the etiology of which cannot be elucidated. The fascinating aspect is the mode of clinical presentation and the rapid resolution of radiologic abnormalities. Histologic examination of the brain is provided in an attempt to elucidate the radiographic abnormalities.

[Acute disseminated encephalomyelitis (ADEM)-like exacerbation in the patients with cryptococcus meningitis treated successfully by steroid pulse therapy].

A 58-year-old man was admitted to our hospital with suspicion of aseptic meningitis. He had been well until the day before admission, when he became suffering from headache and nausea. Cerebral spinal fluid (CSF) analysis on admission revealed Cryptococcus neoformans. Neurological examination and brain CT scan showed no abnormality. On the 5th hospital day, he noticed ataxia and weakness in his right extremities and soon fell into drowsy to comatose state. CSF study revealed marked elevation of pleocytosis and oligoclonal IgG bands. The T2 weighted image of brain MRI showed multiple high inten

Accelerated induction of experimental allergic encephalomyelitis in PL/J mice by a non-V beta 8-specific superantigen.

Superantigens such as the staphylococcal enterotoxins can play an important role in exacerbation of autoimmune disorders such as experimental allergic encephalomyelitis (EAE) in mice. In fact, superantigens can reactivate EAE in PL/J mice that have been sensitized to rat myelin basic protein (MBP). The T-cell subset predominantly responsible for disease in PL/J mice bears the V beta 8+ T-cell antigen receptor (TCR). The question arises as to whether T cells bearing other V beta specificities are involved in induction or reactivation of EAE with superantigen. Thus, we have investigated the abil…

Synthetic peptides of Venezuelan equine encephalomyelitis virus E2 glycoprotein. I. Immunogenic analysis and identification of a protective peptide.

Fourteen peptides representing 67% of the extramembranal domain of the Venezuelan equine encephalomyelititis (VEE) virus E2 glycoprotein were synthesized and analyzed to determine their antigenic, immunogenic, and protective capacities. Thirteen of 14 peptides elicited antibody for the homologous peptide. Thirteen peptides elicited antiviral antibody that recognized either the Trinidad (TRD) strain of VEE virus or the TC-83 vaccine derivative, or both. Two peptides, VE2pep01(TC-83) and VE2pep01(TRD), protected significant numbers of mice from TRD virus challenge. The majority of the peptides w

Electron microscopic analysis of infection patterns for Venezuelan equine encephalomyelitis virus in the vector mosquito, Culex (Melanoconion) taeniopus.

The infectious process for Venezuelan equine encephalomyelitis virus in an enzootic vector mosquito, Culex (Melanoconion) taeniopus, was examined by transmission electron microscopy. Following large dose oral infection, virus was seen in the abdominal fat body and epidermis within 1 hr of engorgement. Replicated virus appeared to leave the mesenteron 3-4 hr post-infection. Dissemination to other organs occurred between days 1 and 2 of extrinsic incubation, when the hindgut and abdominal nerve ganglia were found to be infected. Virus reached the thoracic nerve ganglia, brain and salivary glands…

A new pattern of spinal-cord demyelination in guinea pigs with acute experimental allergic encephalomyelitis mimicking multiple sclerosis.

A technique is described for producing large demyelinating lesions of the spinal cord in the guinea pig. Guinea pigs were pretreated by immu … able amount of free lipids. There were also infiltrative lesions of classical experimental allergic encephalomyelitis (EAE) of normal severity in the same animals. The demyelinating lesions resembled those seen in multiple sclerosis in their location and extent in the spinal cord and in the presence of free lipids. Control experiments indicated that pretreatment wi …

Cerebral prostaglandin synthesis during the dietary and pathological stresses of essential fatty acid deficiency and experimental allergic encephalomyelitis.

Rats of the Lewis strain were fed diets adequate or deficient in essential fatty acids (EFA). At 70-80 days of age experimental allergic encephalomyelitis (EAE) was induced using adjuvants containing either Mycobacterium butyricum or Mycobacterium tuberculois H37Ra. When the former Mycobacterium was used, the incidence of EAE was greater in the EFA-deficient than in EFA-adequate controls; but when the rats challenged with M. tuberculosis, the incidence of the disease was the same in both dietary groups. Brain slices from EFA-deficient rats had a marginally depressed synthesis of prostaglandin …

Cerebrospinal fluid opening pressure in relation to symptomatology and craniocervical anatomy in patients with myalgic encephalomyelitis/chronic fatigue syndrome.

BACKGROUND: Myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) is a debilitating disease that affects millions worldwide. Its cause remains unknown, although many physiological mechanisms are impaired. Structural abnormalities in the craniocervical region seem to be more prevalent in patients with ME/CFS, with a possible impact on intracranial pressure (ICP) and lumbar puncture (LP) measurements. This study aimed to quantify the occurrence of elevated cerebrospinal fluid (CSF) opening pressure and a possible association with clinical symptoms and radiological variables in craniocervic…

Tryptophan Metabolism and Aryl-Hydrocarbon Receptor Agonists in the Gut Microbiome of People With Myalgic Encephalomyelitis/Chronic Fatigue Syndrome.

Myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) is a debilitating chronic disease with unknown biological basis and no cure. Microbiome dysbiosis has been reported in people with ME/CFS but its relevance to pathophysiology is unknown. Gut microbes are an important source of tryptophan metabolites that activate the aryl hydrocarbon receptor (AHR), a regulator of homeostatic and inflammatory genes. Dysregulated activation of AHR contributes to pathophysiology of several neuroimmune and chronic diseases but its role in ME/CFS has not been investigated. The purpose of this study was to…

Changing mortality trends in encephalitis, myelitis, and encephalomyelitis in the United States: A Population-based analysis from 1999 to 2020.

OBJECTIVE: Encephalitis, myelitis, and encephalomyelitis are serious neuroinflammatory disorders with considerable mortality. This study aims to analyze U.S. mortality trends for these conditions from 1999 to 2020, examining variations across demographic groups, geography, and urbanization levels to identify evolving patterns and risk factors. METHODS: A retrospective, population-based study used CDC WONDER mortality data. Deaths attributed to encephalitis, myelitis, and encephalomyelitis were identified using ICD-10 code G04. Age-adjusted mortality rates (AAMRs) were calculated per 100,000 i…

Ассоциация гигантской венозной аномалии развития и остро распространяемого энцефаломиэлита: доклад о деле и исследование магнитного резонанса.

Мы описываем первую связь между острым распространением энцефаломиэлита (АДЕМ) и гигантской венозной аномалией развития (ДВА) в контексте миэлина олигодендроцита, связанного с гликпротеином (МОГ) и связанным с ним расстройством (МОГАД). Пациентка была молодой женщиной с головной болью, брадипсихией и тетрапирамицидным синдромом. Воображение показало, что в мозгу и спинном мозге распространяются тепфективные провокационные повреждения, при этом массивная правая лобная доля повреждена вокруг гигантского DVA. Известно, что демиелионирующие поражающие повреждения происходят в перивенном стиле, и у

Совпадение в аннотации оригинала
We describe the first reported association between acute disseminated encephalomyelitis (ADEM) and giant developmental venous anomaly (DVA) in the context of myelin oligodendrocyte associated glycoprotein (MOG) associated disorder (MOGAD). Patient was a young woman presenting with headache, bradypsychia and tetrapyramidal syndrome. Imaging showed disseminate…

The potential role of S-nitrosoglutathione reductase in astrocyte BAFF expression and B cell activation in experimental autoimmune encephalomyelitis.

B cell-activating factor (BAFF) is a key mediator of B cell-driven autoimmune pathology. In mice with experimental autoimmune encephalomyelitis (EAE), a widely used model of multiple sclerosis (MS), we observed a pronounced accumulation of B cells within the spinal cord, alongside elevated BAFF expression, particularly in GFAP+ activated astrocytes located in the subpial-region. This upregulation of BAFF coincided with the infiltration of CD4+ T cells, notably Th1 cells producing IFNγ, a cytokine critical for inducing BAFF gene expression in astrocytes. Concurrently, elevated BAFF levels in th…

Case report: orthostatic hypotension as the first presentation of progressive encephalomyelitis with rigidity and myoclonus (PERM) with multiple autoimmune antibodies.

INTRODUCTION: Stiff person syndrome (SPS) is a rare disease characterized by axial and lower-extremity muscle rigidity, muscle spasm, and pain. Progressive encephalomyelitis with rigidity and myoclonus (PERM) is a variant of SPS. This case is particularly notable for its uncommon initial symptom: orthostatic hypotension, coupled with the presence of multiple antibodies. Such a presentation is a rarity in the context of PERM, thus providing a fresh and unique angle for both diagnosis and treatment. CASE PRESENTATION: This case presents a 71-year-old man who was ultimately diagnosed with progre…

Dimethyl fumarate modulates the regulatory T cell response in the mesenteric lymph nodes of mice with experimental autoimmune encephalomyelitis.

Dimethyl fumarate (DMF, Tecfidera) is an oral drug utilized to treat relapsing-remitting multiple sclerosis (MS). DMF treatment reduces disease activity in MS. Gastrointestinal discomfort is a common adverse effect of the treatment with DMF. This study aimed to investigate the effect of DMF administration in the gut draining lymph nodes cells of C57BL6/J female mice with experimental autoimmune encephalomyelitis (EAE), an animal model of MS. We have demonstrated that the treatment with DMF (7.5 mg/kg) significantly reduces the severity of EAE. This reduction of the severity is accompanied by t…

Pediatric Acute Disseminated Encephalomyelitis Triggered by Concurrent Administration of Seasonal and H1N1 Influenza Vaccines: A Case Report and Review.

BACKGROUND: Acute disseminated encephalomyelitis (ADEM) is a rare, immune-mediated inflammatory disorder of the central nervous system (CNS), typically characterized by the acute onset of multifocal demyelination. The pathogenesis of ADEM remains unclear, but it is believed to be triggered by an autoimmune response, often following viral infections or vaccinations. CASE REPORT: This case report describes a 3-year-old child who developed ADEM after receiving two concurrent influenza vaccines: one for seasonal influenza and one for the 2009 H1N1 pandemic. The patient presented with motor regres…

Alterations in the Hypothalamic-Pituitary-Adrenal Axis as a Response to Experimental Autoimmune Encephalomyelitis in Dark Agouti Rats of Both Sexes.

Multiple sclerosis (MS) is a chronic inflammatory disease that affects the central nervous system, usually diagnosed during the reproductive period. Both MS and its commonly used animal model, experimental autoimmune encephalomyelitis (EAE), exhibit sex-specific features regarding disease progression and disturbances in the neuroendocrine and endocrine systems. This study investigates the hypothalamic-pituitary-adrenal (HPA) axis response of male and female Dark Agouti rats during EAE. At the onset of EAE, Crh expression in the hypothalamus of both sexes is decreased, while males show reduced …

Лизат парабасероид дистазонис предотвращает серьезные формы экспериментального аутоиммунного энцефаломиэлита, модифицируя примитивную реакцию клеток Т.

Микробиота кишечника влияет на реактивность иммунной системы, а парабактероид дистасонис появился как антивоспалительная комменза. Здесь мы изучили, может ли ли его лизат предотвратить сильные формы нейроинфламмации в экспериментальном аутоиммунном энцефаломиелите (EAE) у мышей и как эта превентивная стратегия влияет на кишечную микробиоту и иммунную реакцию. Лизат анаэробной культуры P. distasonis (Pd лизат) был в устной форме подан мышам C57BL/6 в четырех еженедельных дозах. Неделю спустя EAE был вызван, и через три недели после вводного курса была проведена оценка степени заболеваемости. Фе

Совпадение в аннотации оригинала
The gut microbiota influences the reactivity of the immune system, and Parabacteroides distasonis has emerged as an anti-inflammatory commensal. Here, we investigated whether its lysate could prevent severe forms of neuroinflammation in experimental autoimmune encephalomyelitis (EAE) in mice and how this preventive strategy affects the gut microbiota and imm…

Identification of a novel porcine Teschovirus 2 strain as causative agent of encephalomyelitis in suckling piglets with high mortality in China.

BACKGROUND: Porcine Teschovirus (PTV), also named Teschovirus A, is prevalent in pig populations, mainly causing neurological symptoms, diarrhea, pneumonia, and reproductive failure, however the morbidity and mortality are usually low in pig farms. CASE PRESENTATION: In this study, we reported a PTV outbreak investigation in one large-scale pig farm in China with severe symptoms including diarrhea, lethargy, locomotor ataxia, nystagmus, paralysis of the hind limbs, and coma in piglets. More importantly, the mortality reached 38% in suckling pigs, which is remarkably high in PTV history. A nov