Objective To investigate the mechanism of body weight support treadmill training (BWSTT) and electroacupuncture (EA)for spinal cord injury. Methods 56 adult SD rats were divided into control group (n=16), EA group (n=16), BWSTT-EA group (n=16) andblank group (n=8). They were treated 3 d after operation, and assessed with Basso-Beattie-Bresnahan (BBB) scale and the brain-derived neurotrophicfactor (BDNF) was measured in injured tissue with real time immunohistochemisty assay 1 d, 7 d, 14 d, 21 d after treatment. ResultsThe score of BBB was significantly higher in the BWSTT- EA group than in control group and EA group 1 d, 7 d, 14 d, 21 d after treatment(P<0.05), as well as the expression of BDNF (P<0.05). Conclusion BWSTT and EA can promote the recovery of spinal cord injury,which may associate with the expression of BDNF in injured tissue.

Objective To explore the optimal treatment options of Stanford type B aortic dissection. Methods A to?tal of 51 patients with Stanford type B aortic dissection who visited the General Hospital of Tianjin Medical University from May 2008 to March 2013 were analyzed retrospectively. Survival and recovery of patients were evaluated by follow ups. Pa?tients were divided to TEVAR group(40 cases)and conservative group(11 cases)according to the treatment they recieved. Results Operations were successful in all 40 patients. There were two cases of perioperative death(5%). And none of pa?tients died in TEVAR group during follow-up. One case among 11 patients who received conservative treatment dead in hos?pital(9.1%)while other 7 cases died during follow-up(63.6%). Kaplan-Meier survival curve showed that two-year survival rate of TEVAR group was significantly higher than that of conservative group. In TEVAR group, the maximum diameter of the aorta presented a decreasing trend and thrombosis was seen in artificial lumen with time going after operation. Conclu?sion For patients with Stanford type B aortic dissection, TEVAR presented a high success rate and promoted remodeling of the aortic genuine and aritificial lumen. What’s more, it can significantly improve patient’s survival rate and recovery in short or mid-term period compared with effect of traditional conservative treatment.

BACKGROUND:Bone marrow stromal stem cels transplanted into infracted cardiac tissue can inhibit and reduce myocardial apoptosis, but whether this effect is correlated with improvement in cardiac function is stil unclear. OBJECTIVE:To study the early effect of bone marrow stromal stem cels transplanted into the ischemic myocardium on the cardiac function. METHODS: Models of acute myocardial infarction were established by ligation of the left anterior descending branch, while no ligation was done in the sham group. In the transplantation group, rat bone marrow stromal stem cels (0.1 mL, 2×106 RESULTS AND CONCLUSION:At 3 days after cel transplantation, myocardial apoptosis was more evident in the infarct and ischemic zones of the model group than the sham group; the number of apoptotic myocardial cels was significantly lower in the infarct and ischemic zones of the transplantation group than the model group. Compared with the sham group, the mean arterial blood pressure and left ventricular systolic pressure were ) were injected into five sites on the edge of infarcted myocardial tissues at 30 minutes after myocardial infarction. In the sham group and model group, the same volume of normal saline was injected into the myocardial tissues. Three days after cel transplantation, hemodynamic monitoring, echocardiography, TUNEL assay were employed to detect myocardial apoptosis. significantly reduced, the left ventricular end diastolic pressure was increased, and the left ventricular ejection fraction and shortened fraction were significantly lowered in the model and transplantation groups (P < 0.05), but there was no difference between the model and transplantation groups (P > 0.05). These findings indicate that myocardial apoptosis can be reduced but the cardiac function cannot be improved in acute myocardial infarction rats at early stage after bone marrow stromal stem cels transplantation.

Objective To investigate the scientific research ability and training needs of the new posts of medical undergraduates for better training them.Methods A total of 62 new posts of medical undergraduates from a level-two general hospital in China were recruited by questionnaire survey.Resuits the scientific research ability of the new posts of medical undergraduates is poor,so it is very necessary for their in-service training,93.5~ of them have interest in scientific research and hope to get the training,especially want to take part in the practical activity.Conclusions It is not better that the scientific research ability of the new posts of medical undergraduates,so as early as possible to give the scientific research skill training to them.

[Objective]To study the clinical result of Endo-Model rotating-hinge prosthesis in the treatment of severe knee deformity. [Method]Twenty-two patients(10 males and 12 females;12 right knees,8 left knees,and 2 bilateral knees) were selected for total knee arthorplasty using Endo-Model rotating-hinge prosthesis.The average age was 56.2 years.All the patients were evaluated by HSS score system.[Result]All incisions healed at one-stage and all malformations were corrected.The functional result was good.Mile deep vein thrombosis was found in one case after operation.All the patients were followed up for 6-55 months.No infection or prosthetic loosening was developed.[Conclusion]Endo-Model rotating-hinge prosthesis is an effective and reliable prosthesis for severe knee deformity.

ObjectiveTo evaluate the effects of all-trans retinoic acid(ATRA) on melanin content,activity and protein expression of tyrosinase,mRNA expression of Cu/Zn superoxide dismutase(SOD) in A375 cells irradiated with ultraviolet B(UVB).MethodsCultured A375 cells were classified into 6 groups:ATRA+UVB group treated with ATRA after UVB irradiation,hydroquinone+UVB group treated with hydroquinone after UVB irradiation,UVB group and ATRA group treated with UVB irradiation and ATRA respectively,negative control group receiving no treatment.Melanin content and tyrosinase activity were determined by NaOH solubilization assay and dopa-oxidation assay respectively at 24,48 and 72 hours after the addition of ATRA into medium.Western blot was performed to detect the protein expression of tyrosinase,and real-time quantitative PCR to measure the mRNA expressions of tyrosinase and Cu/Zn SOD in A375 cells after 24-hour culture with ATRA.ResultsThe melanin content and tyrosinase activity decreased in UVB-irradiated cells after being treated with ATRA for 24,48 and 72 hours.The protein (gray scale) and mRNA (2-△△Ct value) expression levels of tyrosinase were 0.72 ± 0.070 and 1.400 ± 0.135 respectively at 24 hours after UVB irradiation,decreased to 0.42 ± 0.056(P ＜0.01) and 0.810 ± 0.062(P ＜ 0.01 ) respectively after additional treatment with ATRA.The mRNA expression level of Cu/Zn SOD was 0.323 ± 0.066 in A375 cells at 24 hours after UVB irradiation,and increased to 0.625 ±0.103 (P ＜ 0.01 ) after additional treatment with ATRA.ConclusionATRA can suppress UVB-induced increase in melanin synthesis and elevate Cu/Zn SOD level in A375 cells,likely through tyrosinase pathway.

Objective To investigate the radioprotective function and its mechanism of Sulforaphane (SF) in mice acute radiation-induced lung injury.Methods Totally 40 female C57BL/6J mice were equally divided into 5 groups randomly.Group A,treated by SF 3 mg/kg plus radiation;group B,treated by SF 5 mg/kg plus radiation;group C,treated by SF 10 mg/kg plus radiation;radiation group with a single dose of 12 Gy in 6 MV X-ray by a linear accelerator,and control group with sham radiation.The mice in drug group were administered intraperitoneally with different concentration of SF every other day from 7 d before irradiation to 7 d after irradiation,while the same volume of DMSO plus physiological saline solvent was given in the control and radiation groups.After being sacrificed at 14 d of SF administration,the pathomorphological changes of mice were observed in trauma lung tissue,the positioning and expression of NLRP3 was observed by immunohistochemical staining,the levels of IL-6,TNF-α and TGF-β1 in bronchoalveolar lavage fluid (BALF) were measured by ELISA,the expressions of NLRP3 and IL-1β mRNA in lung tissue were assayed by qRT-PCR,the expressions of NF-κB p65,NLRP3 and IL-1β proteins in lung tissue were assayed by Western blot,the activity of NF-κB was detected by EMSA.Results In comparison with radiation group,there was an obvious amelioration in pathological injury of lung tissue in the treatment groups:the expression of NLRP3 in lung tissue decreased;the concentration of NLRP3 in the drug intervention group (SF 10 mg / kg) markedly decreased (F =42.750,P ＜ 0.05).the IL-6,TNF-a and TGF-β1 levels in BALF decreased (tIL-6 =-62.65-21.00;tTNF-α =-32.18-16.57;tTGF-β1 =-58.22-46.11,P ＜ 0.05);the expressions of NLRP3 and IL-1β mRNA markedly decreased (tNLRP3 =-6.56-5.68;tIL-1β =-29.75--21.20,P ＜ 0.05),and the expressions of NF-κB p65,NLRP3 and IL-1β proteins decreased (tNF-κB p65 =-34.00--1.71,tNLRP3 =-25.01--16.91,tIL-1β =-73.70--55.14,P ＜ 0.05);the relative expressions of NF-κB p65 and NLRP3 were reduced in a dose-dependent manner (r =0.945,0.926);and the activity of NF-κB were obviously reduced (tNF-κB =-38.68,-614.82,-2 831.40,P ＜ 0.05).Conclusions Sulforaphane effectively alleviates the RILI in lung of mice by downregulating the expressions of inflammatory factor NLRP3.

Objective To explore the mechanism of Didang Qigui Recipe on preventing diabetes. Methods Ten female rats were set randomly as normal group, and others 70 were injected with STZ (60 mg/kg) to establish the diabetic model. After the model was established, 50 model rats were randomly divided into five groups:the model group, Didang Qigui Recipe group, the gliclazide group, Didang Qigui Recipe high-dose group, Didang Qigui Recipe and gliclazide group, with 10 rats in each group. All groups were given a gavage with related medicine. With treatment being given respectively, eight weeks later, contents of IL-1βand IL–2 in serum were detected by ELISA and structure of pancreatic β cells was observed by immunohistochemistry and microscope. Results Compared with the model group, the contents of IL-1βand IL-2 in serum of rats decreased in treatment groups, especially in Didang Qigui Recipe group and Didang Qigui and gliclazide group (P<0.05). The degree of apoptosis in pancreaticβcells, especially in the above two groups, has been less affected than other groups (P<0.05). Conclusion Didang Qigui Recipe has preventive and therapeutic effects on diabetes by inhibition of inflammatory response and protection structure of pancreaticβcells.

AIM: To observe clinical efficacy of the intravitreal injection of conbercept treatment for exudative age -related macular degeneration.
METHODS:Prospective study. Totally 112 senile patients (112 eyes) with exudative macular degeneration were randomly divided into study group and the control group, 56 cases in each group. The study group were treated with intravitreal injection of conbercept. The control group received conservative treatment. Uncorrected visual acuity and foveal retinal thickness were observed before and after treatment in the two groups.
RESULTS: Visual acuity of study group improved significantly, and the most obvious improvement was observed at 6mo after treatment. Foveal retinal thickness of study group was reduced after treatment, and the most obvious decrease was observed at 6mo after treatment.CONCLUSION: Intravitreal injection of conbercept can improve visual acuity reduced foveal thickness in senile patients with exudative age - related macular degeneration.

Objective:To analyze the cause of poor distance visual acuity after refractive rotationally asymmetric multifocal intraocular lens (IOL) implantation in cataract patients.Methods:The data were collected from patients who underwent cataract phacoemulsification combined with intraocular lens (refractive rotationally asymmetric multifocal intraocular lens, SBL-3) implantation at Beijing Aier Intech Eye Hospital from December 2016 to December 2018, and followed up for six months after operation. Standard logarithmic visual acuity chart was used to record uncorrected distance visual acuity, best corrected distance visual acuity, intermediate visual acuity, and near visual acuity. Defocus curve was drawn. The corneal topography, postoperative visual quality and intraocular lens centered or not were checked by Itrace.Results:Total 95 eyes of 70 patients were implemented by cataract phacoemulsification combined with regional refractive intraocular lens operation. Among them, uncorrected distance visual acuity of 16 eyes of 16 patients, were less than or equal to 0.6. The distance power zone of the intraocular lens of 7 patients were placed in the area of high corneal refractive power. Because of measurement error, reserved error, etc, the power of IOL in 7 patients had deviations. Farsightedness and dizziness occurred in 2 patients. The visual discomfort symptoms disappeared and vision improved through intraocular lens positioning.Conclusions:The poor quality of distance visual acuity is mainly caused by the coincidence of the distance power zone with the corneal high-refractive region, the deviation of the power of the intraocular lens, and the intraocular lens center shift. If the cornea has a high refractive area, the distance power zone should avoid to be placed in the same area. The intraocular lens should be reserved between 0-+ 0.25 D. Two-step surgery is recommended. It′s also recommended to make sure the lens is centered during the operation by lens reflection method.