Posts tagged: antibody

OBJECTIVE: To investigate an association between serum B cell activating factor of TNF family (BAFF) levels and anti-aquaporin-4 (AQP4) antibody titers in patients with neuromyelitis optica (NMO) after rituximab treatment. BACKGROUND: Anti-AQP4 antibodies are present in approximately 70% of NMO patients. Such antibodies are probably pathogenic and the titers are elevated during relapse as compared with those in remission.

Neuromyelitis optica (NMO) is an inflammatory demyelinating disease of the central nervous system in which binding of pathogenic autoantibodies (NMO-IgG) to astrocyte aquaporin-4 (AQP4) cause complement-dependent cytotoxicity (CDC) and inflammation.

Since the description of the association between neuromyelitis optica (Devic’s disease) and aquaporin 4 IgG antibody (NMO-IgG), the search for this antibody has been considered a highly recommended laboratory test when centromedullary multisegmental lesions are observed by magnetic resonance imaging (MRI). Such MRI lesions have not been confined to acute NMO because other infectious and post-infectious disorders may display a similar lesional pattern. However, NMO-IgG has not been currently searched and associated with these myelitides

Background: Neuromyelitis Optica (NMO) is a demyelinating disease of the central nervous system which preferentially involves the optic nerve and the spinal cord. This is the first inflammatory disease of the CNS in which a specific antibody (NMO-IgG) has been detected.

Objective: To determine anti-AQP4 antibody status in Thai patients with demyelinating diseases. Methods: Blood samples of patients visiting MS clinic at Siriraj Hospital, Thailand were collected and sent to Tohoku University for testing anti-AQP4 antibodies using AQP4-transfected cell-based assay. Diagnosis was as follows

Multiple sclerosis (MS) is a demyelinating disease of the central nervous system (CNS) while neuromyelitis optica (NMO) is an inflammatory disease of the CNS that selectively affects the optic nerves and spinal cord. In Asians, MS is rare; however, when it appears, the selective and severe involvement of the optic nerves and spinal cord is characteristic. This form, termed opticospinal MS (OSMS), has similar features to the relapsing form of NMO in Western populations

BACKGROUND: Neuromyelitis optica (NMO) is a disease of the CNS characterized by severe optic neuritis and longitudinally extended transverse myelitis. Recent studies suggest that anti-aquaporin-4 (AQP4) antibodies, NMO-specific biomarkers, are pathogenic and target AQP4-expressing astrocytes in NMO, although an additional event (T-cell response or infection) should occur for anti-AQP4 antibodies and complements to pass through the blood-brain barrier and cause the CNS lesions

BACKGROUND: Antibodies to aquaporin-4 (AQP4) are found in a fraction of Japanese opticospinal multiple sclerosis (OSMS) patients. However, it remains unknown whether anti-AQP4 antibody-positive and negative OSMS patients possess an identical disease

It is known that pregnancy influences the relapsing rate of multiple sclerosis (MS); however, interaction between pregnancy and relapse of neuromyelitis optica (NMO), a distinct disease from MS, remains unclear. A 34-year-old woman who 1 year previously had clinical history of Sj?gren syndrome complicated by myelitis with the presence of anti-AQP4 antibody in her serum, although there was no optic neuritis involvement, was neurologically normal at time of becoming pregnant.

Brain lesions are not uncommon in neuromyelitis optica (NMO) patients with anti-aquaporin-4 (AQP4) antibody; however, the appearance of these lesions is said to be different from that of those in Western patients with multiple sclerosis (MS). To clarify the similarities and dissimilarities of brain lesions in anti-AQP4 antibody-positive and -negative MS and NMO patients, we examined the presence of anti-AQP4 antibody in the sera of 148 consecutive patients fulfilling Poser’s criteria for clinically definite MS, of whom 38 also met the revised NMO criteria, using an immunofluorescence method, and analyzed brain lesions by magnetic resonance imaging (MRI)

We report the case of a 31-year-old woman who presented with neuromyelitis optica (NMO) associated with Sjogren syndrome and distal renal tubular acidosis. She was hospitalized because of cervical transverse myelopathy and right optic neuritis. She had been clinically diagnosed with Sjogren syndrome, with a high titer of anti-SS-A antibody (1:500) and anti-SS-B antibody (1:498)

OBJECTIVE: To construct the human aquaporin-4 (AQP4) expressing vector and detect anti-AQP4 antibody in serum of patients with neuromyelitis optica (NMO). METHODS: RNA was extracted from human glioblastoma and AQP4 cDNA obtained through RT-PCR.The fragment was cloned into the lentiviral expressing vector (iDUET101) and transformed into competent strain Hb101 for later amplification; plasmids were extracted from the amplified positive-bacteria-colony, sequenced and transfected into HEK-293T cells