Nucleocytoplasmic transport and neurodegenerative diseases / 药学学报

Nucleocytoplasmic transport is the basic cellular activity of eukaryotic cells, which plays a role in cell physiological and pathological processes. A large amount of evidences indicate that impaired nucleocytoplasmic trafficking has emerged as a mechanism contributing to the pathology of neurodegenerative diseases. The regulation of nucleocytoplasmic transport is crucial to elucidate the pathogenesis and intervention in the neurodegenerative diseases. This article summarizes the evidences in disturbed nucleocytoplasmic transport of neurodegenerative diseases in the past two decades, further explores the directions and provides a theoretical basis for the pathogenesis and drug targets in neurodegenerative diseases.

Changes in expression of estrogen receptor α and β associated with anxiety-like behavior of dams in dams-offspring separation of C57BL/6 J mice / 解剖学报

Objective To investigate the effects of dams-offspring separation on anxiety-like behaviors of dams, and if these anxiety-like behaviors of dams are associated with estrogen receptorα(ERα) and β( ERβ)in some brain regions. Methods Thirty C57BL/6 J female mice were divided into three groups, control group (CG, n= 10,non-isolated group), short-term separation group( SG,/i= 10, dams were separated from their offspring for 15 minuts per day from the second day to the tenth day after childbirth ) and long-term separation group ( LG, n = 10, dams were separated from their offspring for 3 hours per day from the second day to the tenth day after childbirth ). Anxiety-like behaviors of dams were evaluated in an open-field (OF) and elevated plus-maze test ( EPM ). The level of ERα- immunoreactive neurons (ERα-IRs) and ERβ-immunoreactive neurons (ERβ-IRs) in three brain regions including medial preoptic area (mPOA), hypothalamic ventromedial nucleus (VMH) and medial amygdaloid nucleus ( MeA) were analyzed. Results In OF, compared to CG group and SG group, LG group had significantly less time in center area, crossing number and total distance(P0.05 ). In EPM, compared to CG group and SG group, LG group had significantly less percentage of time, distance in open arms and total distance(P<0.001 ). Compared to CG group and SG group, LG group had significantly less ERa-IRs and ERβ-IRs in mPOA, VMH, and MeA(P<0.01). Conclusion Dams that are long-termly separated from their offspring may have anxiety-like behavior, and this behavior may be related to the significant reduction of ERa and ERβ in these brain regions.