Association between high sensitivity C-reactive protein and contrast induced acute kidney injury in patients with acute coronary syndrome undergoing percutaneous coronary intervention: impact of atorvastatin / 中华心血管病杂志

<p><b>OBJECTIVE</b>To observe the association between preprocedural high sensitivity C-reactive protein (hs-CRP) level and incidence of contrast induced acute kidney injury (CI-AKI) in acute coronary syndrome (ACS) patients undergoing percutaneous coronary intervention (PCI) and the impact of atorvastatin pretreatment on CI-AKI.</p><p><b>METHODS</b>According to the level of preprocedural hs-CRP, 270 ACS patients were divided into three groups: high hs-CRP group (hs-CRP ≥ 3 mg/L, n = 176), moderate hs-CRP group (hs-CRP 1-3 mg/L, n = 60) and normal hs-CRP group (hs-CRP < 1 mg/L, n = 34). According to the dosage of preprocedural atorvastatin, the high hs-CRP group was further divided into 10 mg group (n = 49), 20 mg group (n = 66) and 40 mg group (n = 61). Serum creatinine (Scr), blood urea nitrogen (BUN), cystatin C (Cys C), hs-CRP were measured at before and 24 hours, 48 hours after PCI. CCr and GFR were calculated according to Scr and Cys C. Risk factors for CI-AKI were determined by multivariate logistic regression analysis.</p><p><b>RESULTS</b>(1) Cys C was significantly increased and GFR after PCI significantly reduced in high and moderate hs-CRP groups compared with normal hs-CRP group (P < 0.05). (2) Incidence of CI-AKI was 43.18%, 38.33%, 20.59% in high, moderate and normal hs-CRP groups, respectively (P < 0.05). (3) In high hs-CRP group, postprocedural GFR was significantly higher while postprocedural Cys C and hs-CRP were significantly lower in 40 mg statin subgroup than 10 mg and 20 mg statin subgroups (P < 0.05), similar trends were documented when comparing 20 mg statin subgroup with 10 mg statin subgroup (P < 0.05). (4) Multivariate logistic regression analysis showed that pretreatment with high dose atorvastatin was a protective factor for post CI-AKI (20 mg atorvastatin: OR = 0.15, 95%CI 0.06 - 0.33, P = 0.001; 40 mg atorvastatin: OR = 0.10, 95%CI 0.04 - 0.23, P = 0.001), while high levels of preprocedural hs-CRP (OR = 2.06, 95%CI 1.01 - 4.23, P = 0.048), diabetes mellitus (OR = 10.71, 95%CI 5.29 - 21.70, P = 0.001), advanced age (OR = 2.64, 95%CI 1.05 - 6.63, P = 0.038) and renal failure (OR = 5.14, 95%CI 1.13 - 23.39, P = 0.034) were independent risk factors of CI-AKI.</p><p><b>CONCLUSION</b>High hs-CRP level is linked with the development of CI-AKI in ACS patients undergoing PCI and pretreatment with 40 mg atorvastatin is associated with lower incidence CI-AKI, possibly by reducing the postprocedural inflammation responses.</p>

Transplantation of mesenchymal stem cells transfected with hepatocyte growth factor gene improves heart function in rats with heart failure / 中国应用生理学杂志

<p><b>AIM</b>To investigate the effects of hepatocyte growth factor gene transfected MSCs transplantation on cardiac function and fibrosis in rats heart failure model induced by adriamycin.</p><p><b>METHODS</b>MSCs were isolated from SD rats by density gradient centrifugation, purified, and transfected with Ad-hHGF. ELISA were used to detect the protein expression of hHGF in these MSCs. Forty SD rats underwent intraperitoneal injection with adriamycin to induce heart failure model. 8 healthy rats served as control, 24 survival rats were randomly divided into 3 groups (n = 8): Rats in Ad-hHGF transfected MSCs group were injected with Ad-hHGF transfected MSCs 2 weeks after the establishment of the model, rats in MSC group injected with suspension of MSCs only, and model group was injected with cold culture fluid. Heart function was evaluated by a physiological recorder 4 weeks after cell transplantation. Myocardial cell morphology and interstitial collagen were studied by electron microscope and were stained by Sirus red. TGF-beta1 was detected by immunohistochemical method.</p><p><b>RESULTS</b>(1) MSCs could be transfected efficiently by Ad-hHGF, manifested by a higher level of expression in vitro, persisting 14 days at least. (2) Four weeks after the cells transplantion, cardiac necrosis in MSC-hHGF rats was improved when compared with those in the MSCs (P < 0.05) and Model group (P < 0.01). The heart function of the MSC-hHGF rats was greatly improved with an significant increase in LVSP and + dp/dt(max), although LVEDP still highter than that of normal rats. (3) MSC-Ad-hHGF decreased Myocardial collagen content and the level of TGFbeta1 compaired with MSCs transplanted rats (P < 0.01).</p><p><b>CONCLUSION</b>Transplantation of HGF gene transfected MSCs improved heart function, decreased myocardial collagen and the level of TGFbeta1.</p>

Repair of spinal cord injury by neural stem cells modified with BDNF gene in rats / 神经科学通报·英文版

Objective To explore repair of spinal cord injury by neural stem cells (NSCs) modified with brain derived neurotrophic factor (BDNF) gene (BDNF-NSCs) in rats. Methods Neural stem cells modified with BDNF gene were transplanted into the complete transection site of spinal cord at the lumbar 4 (L4) level in rats. Motor function of rats' hind limbs was observed and HE and X-gal immunocytochemical staining, in situ hybridization, and retrograde HRP tracing were also performed. Results BDNF-NSCs survived and integrated well with host spinal cord. In the transplant group, some X-gal positive, NF-200 positive, GFAP positive, BDNF positive, and BDNF mRNA positive cells, and many NF-200 positive nerve fibers were observed in the injury site. Retrograde HRP tracing through sciatic nerve showed some HRP positive cells and nerve fibers near the rostral side of the injury one month after transplant and with time, they increased in number. Examinations on rats' motor function and behavior demonstrated that motor function of rats' hind limbs improved better in the transplant group than the injury group. Conclusion BDNF-NSCs can survive, differentiate, and partially integrate with host spinal cord, and they significantly ameliorate rats ' motor function of hind limbs, indicating their promising role in repairing spinal cord injury.

Poly-lactic acid and agarose gelatin play an active role in the recovery of spinal cord injury / 神经科学通报·英文版

Objective To investigate the role of poly-lactic acid and agarose gelatin in promoting the functional recovery of the injured spinal cord. Methods Poly-lactic acid (PLA) or agarose was embedded in the space between two stumps of the hemisectioned spinal cord. Immunohistochemistry was used to show astroglia proliferation and the infiltration of RhoA-positive cells. Locomotor activity recovery was evaluated by testing the function of hindlimbs. Results Astroglias and RhoA labeled non-neuronal cells accumulated in the area adjacent to the implant, while the number of RhoA-positive cells was decreased dramatically in the absence of implant. Animals implanted with agarose gelatin recovered more quickly than those with PLA, concomitant with a higher survival rate of the neurons. Conclusion Both PLA and agarose gelatin benefited the recovery of spinal cord after injury by providing a scaffold for astroglia processes. Modulation of the rigidity, pore size and inner structure of PLA and agarose gelatin might make these biodegradable materials more effective in the regeneration of the central nervous system (CNS).

Experimental study of intracerebral transplantation of TH gene modified astrocytes for treating Parkinson's disease / 第三军医大学学报

Objective　To explore the role of tyrosine hydroxy lase (TH) gene in the treatment of Parkinson's disease (PD) by using ex vivo gene transfer. Methods　After the construction of TH gene in a retroviral vector, the astrocytes were cultured with the supernatant containing the recombinant DNA and then grafted into the cerebrum of PD rats. The reduction of the rat rotation beharior was evaluated. Results　The rotati on of PD rats was markedly improved in the rats with ex vivo gene transfer. Conclusion　TH has an obvious efficiency on the treatment of PD and the astrocytes can be used as effective gene transfer cells.

xperimental study on the effect of Naogongfude on the aging of the rat brain / 第三军医大学学报

Objective　To evaluate the effect of Naogongfude (NGFD, a traditional Chinese medicine orally administrated) on learning and memory and the expressions of synaptophysin (SY) and Tau-protein in cerebral cortex and hippocampus in aged rats and to explore the possible mechanism. Methods　Rats were divided into normal and neural disturbance groups according to the outcomes of active avoidance reaction (AAR) test, and then each group was randomly divided into control and NGFD-treated experimental groups. Animals were orally fed with NGFD for 2 months (5 ml/d) in experimental group or routinely fed in control and taken AAR and passive avoidance reaction (PAR) tests. After the rats were sacrificed, the synaptosome count, the expression of SY and Tau-protein, and the neuron apoptosis in cerebrum were examined. Results　The rats after 2-month NGFD administration had an increased AAR acquisition, obviously delayed AAR extinction and prolonged step through latency (STL) of PAR. The number of synaptosomes was raised and the immunoreactive intensity of synaptophysin was increased remarkedly, while Tau-protein immunoreactivity and apoptotic cells were decreased in cerebrum. Conclusion　NGFD does have the effect of improving brain function and putting off the aging of rat brain according to the results of behavior study and morphological observation.

Effects of sin-1 on growth and cytoskeleton of endothelial cells in vitro / 第三军医大学学报

Objective　To investigate the mechanism affecting on permeability of vascular endothelial cell by nitric oxide (NO). Methods　Series concentration of sin-1（a donor of NO） were added to ECV 304, a cell line of human umbilical vein endothelium. Cell growth and expression of f-actin, a cytoskeleton protein were observed. Results　Cell growth was inhibited with a dose from 6.25 to 100 μmol/L and was caused to death at the concentration of 50 to 100 μmol/L by sin-1. The expression of f-actin was suppressed obviously after cultured with 100 μmol/L sin-1 for 4 hours. Conclusion　It suggests that anomaly increased NO can increase permeability of blood vessels by suppressing the expression of f-actin, inhibiting cell growth or even resulting in cell death.

Experimental study of intracerebral transplantation of TH gene modified astrocytes for treating Parkinson's disease / 第三军医大学学报

Objective　To explore the role of tyrosine hydroxy lase (TH) gene in the treatment of Parkinson's disease (PD) by using ex vivo gene transfer. Methods　After the construction of TH gene in a retroviral vector, the astrocytes were cultured with the supernatant containing the recombinant DNA and then grafted into the cerebrum of PD rats. The reduction of the rat rotation beharior was evaluated. Results　The rotati on of PD rats was markedly improved in the rats with ex vivo gene transfer. Conclusion　TH has an obvious efficiency on the treatment of PD and the astrocytes can be used as effective gene transfer cells.

xperimental study on the effect of Naogongfude on the aging of the rat brain / 第三军医大学学报

Objective　To evaluate the effect of Naogongfude (NGFD, a traditional Chinese medicine orally administrated) on learning and memory and the expressions of synaptophysin (SY) and Tau-protein in cerebral cortex and hippocampus in aged rats and to explore the possible mechanism. Methods　Rats were divided into normal and neural disturbance groups according to the outcomes of active avoidance reaction (AAR) test, and then each group was randomly divided into control and NGFD-treated experimental groups. Animals were orally fed with NGFD for 2 months (5 ml/d) in experimental group or routinely fed in control and taken AAR and passive avoidance reaction (PAR) tests. After the rats were sacrificed, the synaptosome count, the expression of SY and Tau-protein, and the neuron apoptosis in cerebrum were examined. Results　The rats after 2-month NGFD administration had an increased AAR acquisition, obviously delayed AAR extinction and prolonged step through latency (STL) of PAR. The number of synaptosomes was raised and the immunoreactive intensity of synaptophysin was increased remarkedly, while Tau-protein immunoreactivity and apoptotic cells were decreased in cerebrum. Conclusion　NGFD does have the effect of improving brain function and putting off the aging of rat brain according to the results of behavior study and morphological observation.

Effects of sin-1 on growth and cytoskeleton of endothelial cells in vitro / 第三军医大学学报

Objective　To investigate the mechanism affecting on permeability of vascular endothelial cell by nitric oxide (NO). Methods　Series concentration of sin-1（a donor of NO） were added to ECV 304, a cell line of human umbilical vein endothelium. Cell growth and expression of f-actin, a cytoskeleton protein were observed. Results　Cell growth was inhibited with a dose from 6.25 to 100 μmol/L and was caused to death at the concentration of 50 to 100 μmol/L by sin-1. The expression of f-actin was suppressed obviously after cultured with 100 μmol/L sin-1 for 4 hours. Conclusion　It suggests that anomaly increased NO can increase permeability of blood vessels by suppressing the expression of f-actin, inhibiting cell growth or even resulting in cell death.