Neuroprotective potentials of recombinant human erythropoietin in premature rats with white matter damage
10.3760/cma.j.issn.2095-428X.2015.19.018
- VernacularTitle:重组人促红细胞生成素对早产鼠脑白质病变的神经保护作用
- Author:
Yan LIU
;
Hong JIANG
;
Dongyun LIU
;
Xianghong LI
- Publication Type:Journal Article
- Keywords:
Recombinant human erythropoietin;
White matter;
Preterm
- From:
Chinese Journal of Applied Clinical Pediatrics
2015;(19):1505-1508
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the neuroprotective potentials of recombinant human erythropoietin ( rhEPO) in premature rats with white matter damage. Methods Pregnant rats ( gestational age 15 days) were injected lipopolysaccharide (LPS) (300 μg/kg) intraperitoneally to make cerebral white matter lesions. Another 10 cases of pregnant rats were injected saline (1 mL/kg) intraperitoneally as controls. All preterm rats were born by caesarean sec-tion on embryonic day 21. According to the different processing method,the preterm rats were randomly divided into LPS+rhEPO group (18 cases),LPS+ normal saline (NS) group (18 cases),NS+rhEPO group (18 cases) and NS+NS group (18 cases) ,and they were injected rhEPO (5 000 IU/kg) or 9 g/L saline 1 mL/kg intraperitoneally imme-diately after birth,respectively. The cerebral white matter injury was evaluated with HE staining,and levels of CD68 ,gli-al fibrillary acidic protein (GFAP),myelin basic protein (MBP) were detected by immunofluorescence method 3 and 7 days after birth. Assessment of nerve behavior was done 2 weeks after birth. Results HE staining showed that the white matter lesions were less in LPS+rhEPO group than those in LPS+NS group 3 and 7 days after birth,while NS+rhEPO group and NS+NS group had no cerebral white matter lesions. The expressions of CD68 in LPS+rhEPO group,NS+rhEPO group,NS+NS group significantly decreased compared with LPS+NS group (F=7. 456,P<0. 01) 3 days after birth. The expressions of GFAP in LPS+rhEPO group,NS+rhEPO group,NS+NS group were lower than those in LPS+NS group (F=5. 121,P< 0. 01) 7 days after birth. Meanwhile,the expressions of MBP were not statistically different from the other groups 3 and 7 days after birth (F=2. 628,1. 425,all P>0. 05). No significant differences were found between LPS+rhEPO group and the other groups in evaluation of long-term neural development(all P>0. 05). The val-ues of F by the open field test,suspension test,slope hill test,and resistance to capture test were 2. 09,0. 53,0. 11,0. 37, respectively. Conclusions A single large dose (5 000 IU/kg) rhEPO has neuroprotective effect on the cerebral white matter lesions in the premature rats by inhibiting microglia and astrocyte activation in a short time. The long-term effort remains unknown.
