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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
2013 ; 125
(6
): 879-89
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Lingo-1 expression is increased in essential tremor cerebellum and is present in
the basket cell pinceau
#MMPMID23543187
Kuo SH
; Tang G
; Louis ED
; Ma K
; Babji R
; Balatbat M
; Cortes E
; Vonsattel JP
; Yamamoto A
; Sulzer D
; Faust PL
Acta Neuropathol
2013[Jun]; 125
(6
): 879-89
PMID23543187
show ga
The Lingo-1 sequence variant has been associated with essential tremor (ET) in
several genome-wide association studies. However, the role that Lingo-1 might
play in pathogenesis of ET is not understood. Since Lingo-1 protein is a negative
regulator of axonal regeneration and neurite outgrowth, it could contribute to
Purkinje cell (PC) or basket cell axonal pathology observed in postmortem studies
of ET brains. In this study, we used Western blotting and immunohistochemistry to
examine Lingo-1 protein in ET vs. control brains. In Western blots, Lingo-1
protein expression level was significantly increased in cerebellar cortex (1.56 ±
0.46 in ET cases vs. 0.99 ± 0.20 in controls, p = 0.002), but was similar in the
occipital cortex (p = 1.00) of ET cases vs. controls. Lingo-1
immunohistochemistry in cerebellum revealed that Lingo-1 was enriched in the
distal axonal processes of basket cells, which formed a "pinceau" structure
around the PC axon initial segment (AIS). We found that some Lingo-1-positive
pinceau had abnormally elongated processes, targeting PC axon segments distal to
the AIS. In ET cases, the percentage of Lingo-1-positive pinceau that were ?30 or
?40 ?m in length was increased 2.4- to 4.1-fold, respectively, vs. pinceau seen
in control brains (p < 0.0001). Elongated Lingo-1-positive pinceau strongly
correlated with number of PC axonal torpedoes and a rating of basket cell axonal
pathology. The increased cerebellar Lingo-1 expression and elongated
Lingo-1-positive pinceau processes could contribute to the abnormal PC and basket
cell axonal pathology and cerebellar dysfunction observed in ET.