In demyelinating disorders such as Multiple Sclerosis (MS), targets of injury are myelin and oligodendrocytes, leading to severe neurological dysfunction. Regenerative therapies aimed at promoting oligodendrocyte maturation and remyelination are promising strategies for treatment in demyelinating disorders. Endogenous precursor cells or exogenous transplanted cells are potential sources for rem...

The protein tyrosine phosphatase SHP-1 is a crucial negative regulator of cytokine signaling and inflammatory gene expression, both in the immune system and in the central nervous system (CNS). Mice genetically lacking SHP-1 (me/me) display severe inflammatory demyelinating disease following inoculation with the Theiler's murine encephalomyelitis virus (TMEV) compared to infected wild-type mice...

Abstract Multiple sclerosis (MS) is an autoimmune demyelinating disease of the central nervous system. MS three times more common in women, yet severe men. The mechanisms underlying these sex differences remain largely unknown. initiated by autoreactive T cells, but CNS-infiltrating myeloid cells are key effector driving pathology. role CNS-resident microglial less clear. We have previously sho...

Many disorders of the CNS, such as multiple sclerosis (MS), are characterized by the loss of the myelin sheath surrounding nerve axons. MS is associated with infiltration of inflammatory cells into the brain and spinal cord, which may be the primary cause of demyelination or which may be induced secondary to axonal damage. Both the innate and adaptive arms of the immune system have been reporte...

Objective To describe features of central nervous system (CNS) demyelinating events following vaccination against coronavirus disease 19 (COVID-19). Background Several reports suggest a potential association between COVID-19 vaccines and acute CNS inflammation. Design/Methods A case series was performed at the BARLO MS Centre in Toronto, Ontario, Canada. Clinicians reported patients who experie...

UNLABELLED The initiating events in autoimmune disease remain to be completely understood, but it is thought that genetic predisposition synergizes with "environmental" factors, including viral infection, leading to disease. One elegant animal model used to study the pathogenesis of multiple sclerosis that perfectly blends genetics and environmental components in the context of virus-induced au...

Demyelinating disease occurs in a population of black adult Zambians whose genetic and environmental risk factors for multiple sclerosis are thought to be rare. The diagnosis of demyelinating disease was based predominantly on compatible clinical history and neurologic exam findings, and in some cases, more definitely established by cerebrospinal fluid exam and imaging findings. When available,...

UNLABELLED Growing evidence shows that mechanisms controlling CNS plasticity extend beyond the synapse and that alterations in myelin can modify conduction velocity, leading to changes in neural circuitry. Although it is widely accepted that newly generated oligodendrocytes (OLs) produce myelin in the adult CNS, the contribution of preexisting OLs to functional myelin remodeling is not known. H...

INTRODUCTION Acute Human Immunodeficiency Virus infection is associated with a range of neurological conditions. Guillain-Barré syndrome is a rare presentation; acute inflammatory demyelinating polyneuropathy is the commonest form of Guillain-Barré syndrome. Acute inflammatory demyelinating polyneuropathy has occasionally been reported in acute Immunodeficiency Virus infection but little data e...

OBJECTIVE: To correlate Guillain-Barré as a consequence of the Post-COVID-19 syndrome, evaluating pathophysiological, immunogenic and epidemiological mechanisms. METHODOLOGY: A systematic review was carried out, with secondary data, using articles published in following databases: Latin American Caribbean Literature on Science Health (LILACS), Scientific Electronic Library (ScIELO) Pubmed; desc...