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2016 ; 11
(ä): 26
Nephropedia Template TP
gab.com Text
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English Wikipedia
Inhibition of the classical pathway of the complement cascade prevents early
dendritic and synaptic degeneration in glaucoma
#MMPMID27048300
Williams PA
; Tribble JR
; Pepper KW
; Cross SD
; Morgan BP
; Morgan JE
; John SW
; Howell GR
Mol Neurodegener
2016[Apr]; 11
(ä): 26
PMID27048300
show ga
BACKGROUND: Glaucoma is a complex, multifactorial disease characterised by the
loss of retinal ganglion cells and their axons leading to a decrease in visual
function. The earliest events that damage retinal ganglion cells in glaucoma are
currently unknown. Retinal ganglion cell death appears to be compartmentalised,
with soma, dendrite and axon changes potentially occurring through different
mechanisms. There is mounting evidence from other neurodegenerative diseases
suggesting that neuronal dendrites undergo a prolonged period of atrophy,
including the pruning of synapses, prior to cell loss. In addition, recent
evidence has shown the role of the complement cascade in synaptic pruning in
glaucoma and other diseases. RESULTS: Using a genetic (DBA/2J mouse) and an
inducible (rat microbead) model of glaucoma we first demonstrate that there is
loss of retinal ganglion cell synapses and dendrites at time points that precede
axon or soma loss. We next determine the role of complement component 1 (C1) in
early synaptic loss and dendritic atrophy during glaucoma. Using a genetic
knockout of C1qa (D2.C1qa (-/-) mouse) or pharmacological inhibition of C1 (in
the rat bead model) we show that inhibition of C1 is sufficient to preserve
dendritic and synaptic architecture. CONCLUSIONS: This study further supports
assessing the potential for complement-modulating therapeutics for the prevention
of retinal ganglion cell degeneration in glaucoma.