OBJECTIVE:To study the effect of flavonoids of Astragalus complanatus(FAC) on D-galactose-induced sub-acute aging in mice. METHODS:The subacute aging mice model were established with the use of D-galactose,and the effect of FAC on the associated indexes in model mice such as enzymes,immune organ indexes,hypoxia tolerance time,swimming time under hypoxic condition etc were recorded. RESULTS:FAC treatment significantly up-regulated the activity of SOD,down-regulated MDA content,markedly increased the spleen index and thymus index,prolonged the surviving and swimming time markedly under anoxia condition. CONCLUSION:FAC has anti-aging effect and it can enhance mice's abil-ity against hypoxia and fatigue,which is probably associated to the enhancement of the nonspecific immunity in mice.

ObjectiveTo evaluate the therapeutic effect of endoscopic full-thickness resection (EFTR) for gastric stromal tumors.MethodsA total of 33 patients with gastric stromal tumor orgination from deep muscularis propria layer received EFTR from January 2010 to July 2011.The effectiveness and safety of EFTR were compared with those of other 34 patients with gastric stromal tumor origination from muscularis propria layer who underwent endoscopic submucosal dissection (ESD).ResultsExcept in 2 patients with lesions larger than 3.0 × 3.0 cm,EFTR was successful in others 31 patients,who recovered well and had no recurrence during the follow-up within 12 months.There were no significant differences in resection rate,incidence of complications,body temperature,white blood cell counts or recovery time between 2 procedures (P ＞ 0.05 ).However,the number of clips used in EFTR ( 7.0 ± 3.5 vs.4.9 ± 3.1,P =0.013 ) and postoperative fasting days (3.4 ± 1.5 vs.2.0 ± 1.0,P =0.001 ) were significantly higher than those of ESD procedures.ConclusionEFTR is effective and safe for gastric stromal tumors with no higher risk than ESD,but it is more complex technically.EFTR can be used as an expanding method of ESD in endoscopic treatment of gastric stromal tumors.

Objective To investigate the applicative value of enhanced 3D multi-echo GRE T2*-weighted angiography(ESWAN) sequence phase values in evaluating brain gray nuclei iron content in idiopathic restless legs syndrome(RLS) patients, providing imaging basis in diagnosis and treatment of idiopathic RLS. Methods In our institute from June 2012 to September 2016,forty-five RLS patients were selected as the RLS group, and 45 healthy volunteers as the control group. ESWAN sequence was performed and serum ferritin values were obtained in all patients and volunteers. The raw data of ESWAN was postprocessed , where the phase maps were obtained. Phase analysis was performed on localized brain gray nuclei regions of interest (substantia nigra, red nucleus, dentate nucleus, thalamus, pallidum, putamen and caudate nucleus ) selected on phase maps. Differences between the 2 subject groups were evaluated using ANCOVA including age as a covariate. Results The phase values of the substantia nigra, thalamus, pallidum and putamen in the RLS group were (-0.087 ± 0.021), (-0.053 ± 0.012), (-0.161 ± 0.008), (-0.125 ± 0.019) radians , respectively. The phase values of the substantia nigra, thalamus, pallidum and putamen in the control group were (-0.127 ± 0.007), (-0.066 ± 0.007), (-0.166 ± 0.007), (-0.150 ± 0.010) radians, respectively. There were significant differences between the two groups (F=142.492, 37.988, 10.558, 60.725;P<0.05). Indicating reduced iron content in several regions of brain gray nuclei of the patients with RLS. Serum ferritin concentration between the RLS patients (157.02±95.78)μg/L and healthy controls (175.49 ± 38.65)μg/L was not significant (F=1.353,P>0.05). Conclusions Phase values can make a quantitative assessment of brain gray nuclei iron content in RLS patients, our results supported the hypothesis of reduced brain iron content in RLS patents , which may have an important role in the pathogenesis of the disorder. However, iron content change in some brain regions was not correlated with serum ferritin concentration changes.

BACKGROUND: Previous research has investigated the effect of nano-zirconium dioxide-toughened hydroxyapatite (nano-ZrO2-HA) on the proliferation and differentiation of rabbit bone marrow stromal cells.OBJECTIVE: To evaluate the biocompatibility of nano-ZrO_2-HA compound.METHODS: The experiments of acute toxicity,subacute toxicity,pyrogen,hemolysis,and intramuscular implantation were performed on New Zealand rabbits,healthy adult Kunming mice,and adult rats according to "Technical Evaluation Standards of Biomedical Materials and Medical Instruments",promulgated by Chinese Board of Health.RESULTS AND CONCLUSION: Acute toxicity: All experimental animals survived.There was no significant difference in body mass before and after testing (P> 0.05).Pyrogen: Heating reaction was not tested.Hemolysis: Generally speaking,hemolytic crisis was not observed after 1 hour,and hemolytic rate was less than 5%.Intramuscular implantation: Infection did not occur in any animals,and materials were not discharged at all.Four weeks later,muscles were closely integrated with materials.A certain quantity of tissue grew into material pore,and peripheral muscle still had normal morphology and structure.Subacute toxicity:There was no significant difference in body mass and blood routine before and 2 weeks after testing.HE staining demonstrated that necrotic focus and other lesion were not observed in heart,liver,and kidney tissues under optic microscope.The results suggested that nano-ZrO_2-HA was non-toxicity,and it had no pyrogen and hemolysis effect,as well as it did not stimulate to the muscle of rabbit.Inflammatory rejection did not happen to the animal.The nano-ZrO_2-HA was closely integrated with the muscle,characterizing by great biocompatibility.Therefore,it can be used as substitution materials in clinical experiment.But it still needs to be evaluated completely.

Objective To establish a stable orthotopic model with high green fluorescent protein (GFP) expression in nude mice and observe its biological features.Methods Human HCT116 colon cancer cells transfected with GFP pLPCX retroviral plasmid were used to build a subcutaneous tumor model in nude mice.Fifteen BALB/C nude mice were selected to underwent orthotopic transplantation of colon when the GFP-labeled tumor grew to 10 mm × 10 mm as observed by in vivo fluorescent microscopy.The growth and metastasis of orthotopically implanted colon cancer cells were observed with fluorescent imaging system at different time points.The differences of the tumor size measured by peripheral vernier caliper and fluorescent imaging system were analyzed using the t test,and the differences in different groups were analyzed using the analysis of variance.Results GFP-labeled colon cancer models were successfully established in all the 15 nude mice,and there was no surgery-related complications or death.Tumors marked by GFP were observed under fluoroscope in week 3.The size of the tumors progressively increased with time.The volumes of the orthotopically transplanted tumors obtained from global measurement using fluorescent imaging system were greater than those measured by peripheral vernier calipers at postoperative week 3,4,5,6,7,while no statistically significant difference was observed (t =-1.280,-1.115,-0.718,-0.199,-0.386,P ＞0.05).There was a significant difference in the interation of measure method and different time points (F =29.546,P ＜ 0.05).Eight nude mice survived at the end of the experiment,and tumor metastasis was observed in 6 mice.Conclusions It is technically feasible to construct GFP-labeled colon cancer orthotopic transplantation model.The mice model could be used for real-time,in vivo,non-invasive and dynamic observation and analysis of the growth and metastasis of tumor cells.

Objective To report the clinical effects of microsurgery in treatment of infected extremities after blood vessel prosthesis were transplanted.Methods From Jan.1998 to Dec.2008,8 cases of major vascular injuries in extremities were blood-supplied by cross bridge vascular anastomosis from uninjured extremities,including 4 cases of femoral artery and vein,2 cases of popliteal artery and vein,and 2 cases of brachial artery and vein. Results After 3 years of follow-up,blood circulation of infected extremities were reestablished in each of 8 cases,as well as function and appearance recovered.Conclusion The procedure of cross bridge vascular anastomosis from uninjured extremities may efficiently restitute the blood supply of the infected extremities after blood vessel prosthesis were transplanted,and decrease the rate of amputation.

Objective To investigate immunological changes in the serum of elderly patients with primary nephrotic syndrome (PNS).Methods We made a retrospective analysis of clinically relevant immunological parameters and pathological data of PNS patients 60 years old and above (elderly group)in our hospital for kidney biopsy between September 2010 and November 2013.The data of similar patients but younger than 60 years old (control group)were collected for comparison.Results ① The average levels of IgG in serum of the two groups were both lower than the normal level.And the patients with a decreased level accounted for 59.3% in the elderly group and 78.2% in the control group.The results exhibited a significant difference (P <0.05).The elderly group had higher proportions of IgA level in the serum and IgA and IgG/IgM ratio than the control group.The level of IgM in the aged patients,however,was significantly lower than that in the control group (P <0.05 ).The mean concentrations of C3 and C4 in the serum were both in the normal range,and no significant difference was observed (P >0.05).③ IgG had a negative correlation with urinary protein and cholesterol in serum (the values of r were-0.107,-0.238,respectively,P <0.05).However,there was a positive correlation between IgG and albumin (r=0.252,P <0.05).The results in both groups were consistent.④ Membranous nephropathy was the most common pathological type in aged patients while in control group IgA nephropathy was the most common.Conclusion ① The level of IgG in the serum decreases in most aged patients with PNC.The serum IgA and IgG/IgM ratio are elevated while concentrations of C3 and C4 change little.②The change of IgG is correlated with urinary protein, serum albumin and cholesterol in aged patients with PNS.

0.05) between two groups. Conclusion The results show that the combination of terbinafine and dibazol can improve clinical and mycologic effects and shorten therapeutic course for the treatment of onychomycosis.

OBJECTIVE: To assess the visual prognosis of laser treatment for diabetic retinopathy at different stages. METHODS: Based on the Diabetic Retinopathy Photocoagulation Study Group (DRPS), 138 patients (210 eyes) with nonproliferative diabetic retinopathy (NPDR), preproliferative diabetic retinopathy (PPDR), or proliferative diabetic retinopathy (PDR) were treated with laser photocoagulation. After 3 to 6 months,visual changes were inspected, fundus fluorescence angiography (FFA) was performed. Further photocoagulation was complemented according to the remaining fluorescein leakage, non-perfusion areas, microangioma and new vessels existing or disappearing. The follow-up was 6 approximately 24 months. RESULTS: After the laser photocoagulation treatment, the rate of improvement and unchanging of visual acuity was 95.83% in NPDR group, 92.86% in PPDR group and 73.81% in PDR group. After 3 to 6 months, FFA showed that the effective rate was 95.83% in NPDR group, 78.33% in PPDR group and 60.31% in PDR group. CONCLUSION The visual prognosis of diabetic retinopathy at different stages is different after retinal photocoagulation. To save the visual function of patients, the appropriate time and reasonable laser parameter should be carefully chosen in the treatment of retinal photocoagulation in DR patients of different stages, especially in those with macular edema.
Adult ; Aged ; Diabetes Mellitus, Type 1 ; complications ; Diabetes Mellitus, Type 2 ; complications ; Diabetic Retinopathy ; therapy ; Female ; Humans ; Laser Coagulation ; methods ; Male ; Middle Aged ; Prognosis ; Visual Acuity ; physiology

Objective To investigate the effect of different frequencies of endoscopic ultrasonography (EUS) on diagnosis of duodenal submucesal lesions. Methods A total of 210 elevated duodenal lesions detected by routine endoscopy in 201 patients were examined by EUS at different frequencies according to lesion features and image clarity. Endoscopic resection was applied in 27 lesions with informed consents,and pathological findings were compared with the results of EUS. Results The accuracy of EUS was 81.4% (22/27). Ultrasound of low frequency was superior in displaying overview of lesion and was more suitable for lesions larger than 1.5 cm in diameter or lesions of hyperecho. On the other hand,ultrasound of high frequency was more reliable to reveal minute structures and could be employed in scanning lesions smaller than 1.5 cm in diameter. Combination of different frequencies of ultrasound could provide more details in larger lesions. Conclusion Application of appropriate frequency or combined frequencies of ultrasound in examination of elevated duodenal lesions is beneficial to achieve more accurate diagnosis.