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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 Immunobiology
2014 ; 219
(11
): 836-44
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gab.com Text
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English Wikipedia
Late stages of hematopoiesis and B cell lymphopoiesis are regulated by
?-synuclein, a key player in Parkinson s disease
#MMPMID25092570
Xiao W
; Shameli A
; Harding CV
; Meyerson HJ
; Maitta RW
Immunobiology
2014[Nov]; 219
(11
): 836-44
PMID25092570
show ga
?-Synuclein plays a crucial role in Parkinson's disease and dementias defined as
synucleinopathies. ?-Synuclein is expressed in hematopoietic and immune cells,
but its functions in hematopoiesis and immune responses are unknown. We utilized
?-synuclein(-/-) (KO) mice to investigate its role in hematopoiesis and B cell
lymphopoiesis. We demonstrated hematologic abnormalities including mild anemia,
smaller platelets, lymphopenia but relatively normal early hematopoiesis in KO
mice compared to wild-type (WT) as measured in hematopoietic stem cells and
progenitors of the different cell lineages. However, the absolute number of
B220(+)IgM(+) B cells in bone marrow was reduced by 4-fold in KO mice (WT:
104±23×10(5) vs. KO: 27±5×10(5)). B cells were also reduced in KO spleens
associated with effacement of splenic and lymph node architecture. KO mice showed
reduced total serum IgG but no abnormality in serum IgM was noted. When KO mice
were challenged with a T cell-dependent antigen, production of antigen specific
IgG1 and IgG2b was abolished, but antigen specific IgM was not different from WT
mice. Our study shows hematologic abnormalities including anemia and smaller
platelets, reduced B cell lymphopoiesis and defects in IgG production in the
absence of ?-synuclein. This is the first report to show an important role of
?-synuclein late in hematopoiesis, B cell lymphopoiesis and adaptive immune
response.