ObjectiveTo observe testis tissue changes of experimental cryptorchidism after orchiopexy in various-day-rats.MethodsSeventy-two Sprague-Dawley(SD) male rats were divided into 3 groups randomly and made artificial cryptorchidism:unilateral cryptorchidism group(n=24),bilateral cryptorchidism group(n=24)and sham operation group(n=24)at age 21-day-old.Intra-abdominal testicle was resetting in 2 weeks,at age 40 days and 60 days,the rats were sacrificed for detection tubular fertility index(TFI) and mean tubular diametar(MTD) with hematoxylin-eosine staining and germ cell apoptosis by terminal deoxynucleotidyl transferase mediated d-UTP nick end labeling(TUNEL) assay.ResultsThere were significant differences of MTD,TFI and apoptosis index(AI) between cryptorchidism and scrotal testes(P0.05).The AI of cryptorchidism testes of unilateral cryptorchidism group were significantly lower than that of bilateral cryptorchidism group in 40 days(P0.05).ConclusionsAI of artificial resetting testis is increased and contralateral descended testes in unila-teral cryptorchidism have various damage.It is to lighten that pathological damage of testes of cryptorchidism with prolongation of reset time.

Objective To determine the conditioning regimen suitable for mice allogeneic hematopoietic stem cell transplantation (allo-HSCT).Methods Twelve BALB/c mice were randomly divided into 2 equal groups to undergo X-ray irradiation by linear accelerator at the dose of 7.0 Gy (pure X-ray group) or 60Co source irradiation at the dose of 7.0 Gy (pure γ-ray group).Thirty mice were randomly divided into 2 equal groups to undergo X-ray irradiation and then infusion of bone marrow from donor mice via caudal vein (X-ray + transplantation group) or γ-ray and then infusion of bone marrow via caudal vein (γ-ray + transplahtation group).3,5,7,10,15,20,and 30 d later peripheral blood samples were collected to calculate the number of white blood cells (WBCs) and detect the chimeric rates of lymphocytes by flow cytometry.5,10,and 20 d after irradiation 15 mice were killed with their lung,liver,small intestine,spleen,and femurs taken out to undergo pathological examination.Results The survival rates during the period 5-15 days of the γ-ray + transplantation group were all significantly higher than those of the X-ray + transplantation group.The pathological changes of organs of the X-ray +transplantation group were all more severe than those of the γ-ray + transplantation group.Since the fifth day after transplantation cells originating from the donor began to appear in the peripheral blood.The chimeric rate of the γ-ray + transplantation group 10 days after transplantation was (95.53± 2.57) %.The chimeric rates 5,10,and 20 days after transplantation of the γ-ray + transplantation group were all significantly higher than those of the X-ray + transplantation group (t = 15.263,3.256,P < 0.05).The WBC count of both irradiation groups decreased to the lowest level 5 d later and began to increase 10 days after transplantation and the WBC counts of the γ-ray + transplantation group 10 and 20 days aftertransplantation were both significantly higher than those of the X-ray + transplantation group (t = 3.624,6.695 ,P < 0.05).The chimeric rats of the peripheral lymphocytes 10 and 20 days after transplantation of the γ-ray + transplantation group were both significantly higher than those of the X-ray + transplantation group (t = 12.317,8.295,P < 0.05).The homogeneity rate of transplantation of the γ-ray +transplantation group was better than that of the X-ray + transplantation group.Conclusions As a conditioning regimen in allogeneic hematopoietic stem cell transplantation γ-ray irradiation causes milder injury and accelerated reconstitution of hematopoiesis and immunity,in comparison with X-ray irradiation.

Objective To investigate the molecular mechanism of osteoclast differentiation induced by staphylococcal lipoteichoic acid (LTA-sa). Methods Raw264.7 cells were treated with LTA-sa in a concentration of 200 ng/mL for 0, 5, 10, 20, 40, 60 min and 0, 1, 2, 3 days respectively, and the proteins in signaling pathways associated with osteoclast differentiation were measured with western blot. In addition, Raw264.7 cells were treated with different concentrations of LTA-sa (100, 200 and 400 ng/mL) and PBS for 0, 1, 2, 3 days, the expression of TNF-α, IL-1α and IL-6 was detected with Enzyme linked immunosorbent assay (ELISA). Results (1)Western blot showed that, under stimulation of LTA-sa, IκB-α decreased at 5 min and 10 min, while the phosphorylation of nuclear factor κB increased at 10 min . In addition , NFATc1 increased in 2 and 3 days gradually. The above results were statistically analyzed, and the difference was significant in statistics (P < 0.001). (2)ELISA showed that the expression of IL-6 increased in 2 and 3 days along with the increasing concentration and prolonging stimulation time of LTA-sa. Data were statistically analyzed, the difference was significant in statistics (P < 0.001). Conclusion LTA-sa promotes osteoclast differentiation through the NF-κB signaling pathway and the secretion of IL-6.

Objective To evaluate the efficacy of naloxone used in the postoperation of cerebral tumor.Methods Eighty patients were randomly assigned to receive (treated group:40 patients) or not re- ceive (control group:40 patients) naloxone.Both the two groups accepted the conventional therapy.Re- sults After operation,the content of?-EP,ET decreased continuously but the one of the treated groups was more obviously than that of the control groups (P

Objective To evaluate the correlation between cerebral blood volume and permeability surface by using muhislice CT perfusion imaging with glioma grade.Methods Ninteen patients with gliomas underwent conventional MR and multislice CT perfusion imaging preoperatively.These patients were divided into low grade and high grade groups which were correspond to WHO Ⅱ grade gliomas and WHO Ⅲ or Ⅳ grade gliomas respectively.CT data were transferred to on-line working station and processed to obtain time-signal curves,color perfusion maps and calculated perfusion parameters,including cerebral blood volume(CBV),cerebral blood flow(CBF),mean transit time(MTT)and permeability surfaces (PS)in tumoral parenchyma.Kruskal-Wallis test and correlation of CBV and PS was assessed by using SPSS 11.0 software.Results The median of CBV and PS in low-grade and high-grade glioma were 2.7, 6.5 ml/100 g;0.389,12.810 ml?100 g~(-1)?min~(-1),respectively,corresponding t value were 12.907, 13.500 with P

Adult ; Eye Injuries ; surgery ; Female ; Humans ; Male ; Middle Aged ; Occupational Diseases ; surgery ; Vitrectomy

Objective To explore the relationship between receptor of advanced glycaton end products(RAGE)gene Gly82Ser polymorphism and patients with transient ischemia attack(TIA).Methods The Gly82Ser gene at the position of RAGE gene exon 3 was identified by a polymerase chain reaction- restriction fragment length polymorphism(PCR-RFLP)method in 70 cases of TIA & Diabetes(DM), 60 of simply TIA and 66 healthy control subjects.Results The genotypes of RAGE gene Gly82Ser identified were GG, GS and SS.The frequencies of RAGE gene Gly82Ser GS heterozygous genotype of TIA & DM and control were respectively 62.9% and 43.9%, significantly higher in TIA & DM patients than in control subjects(OR 2.036, 95% CI 1.021--4.062, P=0.042), however no significant difference was found between simply TIA and control(53.3% vs 43.9%, OR 1.299,95% CI O.644--2.618, P=0.465). Significant difference of the frequency of S allele was found neither between TIA & control and control(being 34.3% and 26.5%, respectively, OR 1.446,95% CI 0.859--2.434, P=0.164), nor between simple TIA and control(28.3% vs 26.5%, OR 1.096,95%CI 0.630--1.907, P=0.746).Conclusions RAGE gene Gly82Ser GS heterozygous genotype may be associated with TIA & DM patients.RAGE gene Gly82Ser polymorphism is a risky factor for TIA & DM patients, but not for TIA patients.

OBJECTIVETo examine the effect of particulate matter (PM) less than 10 microns in diameter (PM10) and ozone (O3) on daily mortality in Shanghai, China.

METHODSA generalized additive model with penalized spline function was used to observe the acute effect of PM10 and O3 on daily mortality.

RESULTSHigher PM10 significantly increased the effect of O3 on total mortality, and O3 also increased the effect of PM10 although the estimated increment was statistically insignificant.

CONCLUSIONOur findings provide further evidence for the effect of PM10 and O3 on daily mortality.

Air Pollutants ; toxicity ; China ; epidemiology ; Humans ; Mortality ; Ozone ; toxicity ; Urban Population

OBJECTIVETo analyze the epidemiological and etiologic characteristics of ocular fungal infection in Haikou.

METHODSThe samples of corneal, conjunctivae, anterior chambers, lacrimal sacs were taken from the outpatients and inpatients in the Department of Ophthalmology for fungal culture. The positivity rates of fungal culture were statistically analyzed to describe the seasonal and genus distribution of the fungal infections.

RESULTSA total of 683 patients were involved in this study, and the total positivity rate of fungal culture was 27.96%. The positivity rate was 33.42% in male patients and 21.52% in female patients (P<0.01). The positivity rates were 31.42%, 11.32%, 10.81%, 21.28% and 29.17% in the cornea, conjunctivae, anterior chambers, lacrimal sacs and other locations (P<0.01), and were 34.88%, 22.58%, 11.76%, 4.11%, 21.43% and 13.33% in farmers, workers, teachers, government officers, students and personnel of other occupations (Chi2=39.550, P=0.001), respectively. In terms of age, the rate was 32.30% in 21-40 years group, 31.72% in 41-60 years group, 17.12% in over 60 years group and 26.61% in below 20 years group, showing significant differences (P<0.01). The rates were higher in August, September, October, December, November, all above 30%, but lower in March. Nine genera were identified, including Candida (49.21%), Aspergillus (19.37%), Fusarium (9.42%), mucor (5.76%), Actinomyces (5.24%), Penicillium (3.66%), Saccharomyces (2.62%), non-spore group (1.57%), Alternaria (1.57%), and other genera (1.57%). Among the 94 strains of Candida, 63 (67.02%) belonged to Candida albicans and 14 to Candida tropicalis (14.89%).

CONCLUSIONOcular fungal infection occurs more often in male patients and in the cornea. The common pathogen of ocular fungal infection is Candida, which is different from the etiological characteristics in other areas possibly in association with the tropical climate.

Adult ; Candida albicans ; isolation & purification ; China ; epidemiology ; Eye Infections, Fungal ; epidemiology ; microbiology ; Female ; Humans ; Male ; Middle Aged ; Young Adult

BACKGROUND:Along with the widespread application of biodegradable materials in the field of medicine and the in-depth research of biomechanics,the drawbacks of traditional medical metal materials are increasingly appearing.In recent years,researchers at home and abroad focus on biodegradable materials that are represented by high molecular polymer to seek new breakthroughs in the field of spinal instability.OBJECTIVE:To investigate biomechanical changes of polylactic acid-polyglycolic acid (PLGA) lumbar interbody fusion cage in the body and discusses its feasibility for treating segmental instability of the spine.METHODS:Forty-two healthy pigs (9 months old) were randomly divided into two groups (n=21),and L4/5 intervertebral disc nucleus pulposus was removed in all animals.In experimental group,PLGA lumbar interbody fusion cage filled with broken bone was implanted;and in control group,autologous bone was implanted.X-ray was performed to observe the fusion of operation segments at 4,12 and 72 weeks postoperatively.Feasibility of fibrous fusion was measured by biomechanical test.Histologically,bone graft fusion at the surgical site and material degradation were detected.RESULTS AND CONCLUSION:(1) Imaging examination:Bone graft fusion in two groups was not visible at 4 weeks after operation.Evidence of increasing fusion was found in the experimental group at 12 weeks after operation;a visible part of the bone bridge was found in the control group,in which there was one case of fusion.Degradation of the fusion cage with one case of fusion in experimental group was found after 72 weeks after operation,and two cases of fusion in the control group.(2) Biomechanical test:There was no difference in the spinal range of motion between the two groups in different states at 4 weeks after operation (P ＞ 0.05).The spinal range values of motion at most of the states at 72 weeks after operation were significantly lower than those at 4 weeks after operation.(3) Cell histology observation:With the passage of time,the materials in the experimental group degraded gradually;new bone grew slowly and then fast,with bone fusion step by step.Fusion results were similar in the two groups.Our experimental findings indicate that the PLGA lumbar fusion cage has good biocompatibility.In addition to the individual state (left flexion),the mechanical properties of the fusion cage are similar to that of autogenous bone,and the fusion cage enables the segmental reconstruction of the pig spine to the maximum extent.