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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Acta+Neuropathol+Commun
2017 ; 5
(1
): 70
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Effects of sustained i c v infusion of lupus CSF and autoantibodies on
behavioral phenotype and neuronal calcium signaling
#MMPMID28882191
Kapadia M
; Bijeli? D
; Zhao H
; Ma D
; Stojanovich L
; Milo?evi? M
; Andjus P
; ?aki? B
Acta Neuropathol Commun
2017[Sep]; 5
(1
): 70
PMID28882191
show ga
Systemic lupus erythematosus (SLE) is a potentially fatal autoimmune disease that
is often accompanied by brain atrophy and diverse neuropsychiatric manifestations
of unknown origin. More recently, it was observed that cerebrospinal fluid (CSF)
from patients and lupus-prone mice can be neurotoxic and that acute
administration of specific brain-reactive autoantibodies (BRAs) can induce
deficits in isolated behavioral tasks. Given the chronic and complex nature of
CNS SLE, the current study examines broad behavioral performance and neuronal
Ca(2+) signaling in mice receiving a sustained infusion of cerebrospinal fluid
(CSF) from CNS SLE patients and putative BRAs (anti-NR2A, anti-ribosomal P, and
anti-?-tubulin). A 2-week intracerebroventricular (i.c.v.) infusion of CSF
altered home-cage behavior and induced olfactory dysfunction, excessive
immobility in the forced swim test, and perseveration in a learning task.
Conversely, sustained administration of purified BRAs produced relatively mild,
both inhibitory and stimulatory effects on olfaction, spatial learning/memory,
and home-cage behavior. In vitro studies revealed that administration of some CSF
samples induces a rapid influx of extracellular Ca(2+) into murine neurons, an
effect that could be partially mimicked with the commercial anti-NR2A antibody
and blocked with selective N-methyl-D-aspartate ?(NMDA) receptor antagonists. The
current findings confirm that the CSF from CNS SLE patients can be neuroactive
and support the hypothesis that intrathecal BRAs induce synergistically diverse
effects on all domains of behavior. In addition, anti-NMDA receptor antibodies
may alter Ca(2+) homeostasis of central neurons, thus accounting for
excitotoxicity and contributing to the heterogeneity of psychiatric
manifestations in CNS SLE and other autoantibody-related brain disorders.