Objective To investigate the physical and mechanical properties of home-made bone cement mixed with different antibiotics.Methods The specimens of bone cement each of 40g were divid-ed in to6groups depending on mixed antibiotics,groupⅠmixed with1g gentamicin,groupⅡwith2g gen tam icin,groupⅢwith1g cephradine,groupⅣwith1.5g cefuroxine,groupⅤwith1g ceftriaxone and groupⅥwith out any antibiotics served as control.The dough time,compressing depth,compressive strength,bending strength and bending elastic modulus were measured respectively,elution examination of antibiotics from bone ce ment was performed by chromatography.Results The dough time and compress-ing depth of the groups were better than that of ISO5833standard,and there was no significant difference a-mong the groups.The com pressive strength and bending strength of the groupⅡwere lower than that ISO5833standard,but there was no significant difference among the groups by analysis of variance.The bending elastic modulus of the groupⅡwas lower than the control group and other groups(P

Objective To explore the related risk factors for neuropathic pain in diabetic rats.Methods Female Wistar rats of clean grade were divided into three groups :Non diabetic standard diet (NdStd) group (n=10) ,diabetic high fat diet and pain (DbHFP) group (n=10) ,and diabetic high fat diet and no pain (DbHFNP) group (n=10).Body weight ,blood glucose ,TG ,TC ,HDL‐C ,LDL‐C and 50%pain threshold were measured regularly to assess the relationship between blood lipids and pain. Results Non‐conditional logistic regression analysis showed that pain threshold was negatively correlated with TG , LDL‐C and blood glucose(P<0.05) ,and positively correlated with HDL‐C (P<0.05). And there was no association between TC and body weight (P> 0.05). Conclusion Pain threshold of diabetic rats was negatively correlated with TG ,LDL‐C and blood glucose ,and positively correlated with HDL‐C.

Objective To investigate the effects of treadmill exercise on spatial learning,memory and the expression of hippocampal brain-derived neurotrophic factor(BDNF) in rats after mild traumatic brain injury (TBI).Methods Thirty Sprague-Dawley rats were randomly divided into group T (n =10,undergoing TBI modelling operation and 4 weeks' treadmill exercise training beginning at 48 h after the operation),group C (n =10,undergoing TBI modelling operation and no exercise training) and group N (n =10,undergoing sham operation and no exercise training).Morris water maze(MWM)was used to test rats' abilities of spatial learning and memory.The number of BDNF-positive cells in the hippocampus was measured with immunohistochemistry.Results In the orientational navigation test,the escape latency period was gradually shortened for rats in all groups.At the second training week,the average time of group T(88.54 ±5.73 s) became shorter than that in group C (91.45 ± 8.91 s).At the fourth week,however,the difference [(55.33 ± 6.77 s) vs (74.53 ± 6.85 s)] was significant(P ＜ 0.01).Group N (88.44 ±7.79 s,79.52 ± 8.02 s,69.54 ± 10.14 s and 62.49 ± 7.22 s respectively) also improved significantly more than group C (98.99 ± 6.84 s,91.45 ± 8.91 s,79.65 ± 12.47 s and 74.53 ± 6.85 s respectively) from week 1 to 4 (P ＜ 0.01).The average number of times of passing through the platform area of group N in four weeks (3.00 ± 0.54,3.38 ± 0.74,4.38 ± 1.06 and 6.00 ± 0.76 respectively) and group T from the second week on(3.25 ± 1.28,5.00 ± 0.93 and 5.88 ± 0.99 respectively) were significantly higher than that of group C (1.25 ± 0.71,1.50 ± 0.54,2.13 ± 1.25 and 3.00 ± 0.54 respectively) accordingly (P ＜ 0.01).At the week four,the average number of BDNF-positive cells in group T(128.56 ± 7.93) were significantly larger than that in group C and group N (P ＜ 0.05),with no significant difference was noted between group N and group C (P ＞0.05).Conclusions Treadmill exercise could improve the spatial learning and memory of rats after mild traumatic brain injury.This may be related with the up-regulation of expression of BDNF in the hippocampus.

OBJECTIVE To study risk factors in senile diabetics complicated with urinary tract infections and find out measures to cut down the incidence rate with urinary tract infection.METHODS The age,sex,hospital day,course of diabetes,blood sugar level and catheterization in 181 hospital patients of senile diabetics complicated with urinary tract infections from 2004 to 2007 were analyzed retrospectively.RESULTS The incidence of senile diabetics complicated with urinary tract infections was closely related with age,sex,hospitalization days,course of diabetes,blood sugar level and catheterization.CONCLUSIONS Control measure for risk factors in senile diabetics can actively cut down the incidence rate of urinary tract infection.

Abstract: Objective　To explore the carrying status of four common deafness genes and mutations on 10 loci in newborns in Hainan, and to analyze the molecular epidemiological characteristics of deafness genes and their loci, so as to provide scientific basis for formulating neonatal deafness gene screening strategy and promoting children's hearing health in Hainan. Methods　Newborns born in Hainan from January 2020 to December 2021 were selected as the research objects. The demographic characteristics of the research objects were collected. At the same time, the plantar blood of newborns was collected, and multiplex PCR amplification and directed hybridization combined with high-throughput sequencing technology were applied to detect 10 mutation loci on 4 common deafness genes. T-test or chi square test was used to process the data. Results　A total of 7 124 newborns were included in the study through informed consent, 219 cases of deafness gene mutation were detected with the detection rate of deafness gene of 3.07%. The detection rates of GJB2, SLC26A4, MT-RNR1 and GJB3 were 1.56% (111/7 124), 1.18% (84/7 124), 0.21% (15/7 124) and 0.11% (8/7 124) respectively. Among the 10 loci of the four genes, the positive detection rate of c.235delC locus of GJB2 was the highest, which was 1.38% (98/7 124), followed by c.919-2A>G of SLC26A4 (0.87%, 62/7 124); 2.63% (113/4 289) of the newborns who passed the preliminary hearing screening still carried the deafness gene; in terms of gene type, the detection rate of GJB2 gene in newborns who failed the hearing screening was higher than that in newborns who passed the hearing screening [2.23% (63/7 124) vs 1.12% (48/7 124)，P<0.01]; in terms of gene loci, the detection rate of c.235delC locus in newborns who failed hearing screening was higher than that in newborns who passed hearing screening [2.09% (59/7 124) vs 0.91% (39/7 124)，P<0.01]. Conclusion　The most common deafness genes types in Hainan were GJB2 and SLC26A4; The most common gene mutation sites were c.235delC and c.919-2A>G; 2.63% of the newborns who passed the preliminary hearing screening still carried the deafness gene, among which the high-risk newborns with MT-RNR1 and GJB3 genes were found. Therefore, hearing screening should be combined with deafness gene screening to improve the detection rate of children at high risk of hearing loss.

Objective Laboratory tests of yeast, with their disadvantages of long identification, complicated operation, and low positive rate, cannot meet the needsof rapid diagnosis and timely treatment.This studyinvestigated the feasibility ofapplying matrix-assisted laser desorption ionization-time of flight mass spectrometry ( MALDI-TOF-MS) in rapid identification and clinical isolationof yeast strains. Methods A total of 120 clinical non-repetitive isolates were collected from clinical culture samples and identified by MALDI-TOF-MS and VITEK 2-Compact/API, respectively.The discordant results were resolved by ITS gene sequencing. Results Of the 120 yeast isolates analyzed, 117 (97.5%) were correctly identified at the species level by MALDI-TOF-MS, 1(0.8%) misidenti-fied, and 2 ( 1.7%) unidentified.ITS gene sequencing of the 3 isolates showed the coincidence rate to be 0( 0/3) for MALDI-TOF-MS and Vitek 2-Compact/API. Conclusion MALDI-TOF-MScan be used as a rapid, accurate, and inexpensive tool for the identification of clinical yeast strains.

ObjectiveTo investigate the changes of serum concentration of parathyroid hormone (PTH) and calcium after thyroid surgery and compare the changes among different modes of operation. MethodsFrom Aug. 2006 to Dec. 2009, 470 patients accepted thyroid surgery. The serum concentration of PTH and calcium in different groups was measured and compared before and 1 day after surgery. According to the extent and similarity of the surgery, patients were classified into 7 groups and they were compared in terms of postoperative changes of PTH and serum calcium. Statistical analysis was performed. ResultsThe serum concentration of PTH and calciurn decreased significantly after surgery in all patients except for those receiving unilateral and bilateral partial thyroidectomy. Compared with unilateral lobectomy, surgeries such as bilateral subtotal thyroidectomy, unilateral thyroidectomy with contralateral subtotal thyroidectomy, bilateral near-total thyroidectomy and total thyroidectomy resulted in more dramatic decreases of serum concentration of PTH and calcium and higher incidence of hypocalcemia ( P ＜ 0.05 ). The comparison between patients receiving CLND or not had the same result. Conclusions Almost all kinds of thyroid surgery affect the parathyroid function. The wider the surgery, the higher the possibility of postoperative hypoparathyroidism. The indications and criteria of different types of thyroid surgery are essential for hypoparathyroidism prevention. In some cases, vitamin D and calcium are recommended for preventive purpose.

Objective To investigate the effects of evodiamine on autophagy of human colon a cleno carcinoma lovo cells, and to explore the role and mechanism of autophagy which was induced by evodiamine (EVO). Methods MTT assay combined with the morphologic changes were used to observe the cell viability. Monodansylcadaverine was used to detect autophagy by fluorospectrophotometer and the confocal laser fluorescence microscopy respectively. Immunoblotting assay was used to observe the microtubule-associated protein 1 light chain 3. Finally, evodiamine combined with 3-methyladenine to detect the cell viability with MTT assay and the apoptosis with the flow cytometry, respectively.Results Evodiamine inhibited the viability of Lovo cells in dose-dependent manner ( P ＜ 0. 05 ), especially in 60 μmol/L that was obviously(60% ). Further more, the cell lysis and cell gap widened was observed by the light microscope. Evo triggered the autophagy, and after inhibition the autophagy by 3-MA, the killing capacities of the Evo was enhanced ( P ＜ 0. 01 ). However, autophagy prohibited the apoptosis pathways.Conclusions Evodiamine can trigger the autophagy, which might play a self-defense role in evodiamineinduced cell death. The cytototoxicity of evodiamine can be augmented by the autophagy inhibitors. The joint application of autophagy regulators with the chemotherapeutic agents might enhance the cell killing effects of chemotherapeutic drugs and show a potent role in cancer drug resistance.

Objective:To study the clinicopathological features and differential diagnosis of metaneph-ric adenoma (MA).Methods:The clinicopathological data of 16 cases with MA diagnosed and treated in Peking University First Hospital from 2004 to 2016 were retrospectively analyzed,and the clinical characteristics,pathologic parameters,differential diagnosis,treatment options and prognosis of MA were analyzed with literature review.Results:The patients included 10 females and 6 males.The age of pa-tients ranged from 14 to 83 years (mean =33.7 years).The partial nephrectomy was carried out for most patients.All cases were located in renal codex with 3 growing into the renal sinus.Histologically,the tumor was composed of tubules,papillary or glomeruloid structures and psammoma bodies were focally seen.Immunohistochemical study showed that all the cases expressed vimentin,and 94% cases ex-pressed CD57,63% WT1,75% AE1 /AE3,19% cytokeratin 7 (CK7 )and 13%α-methylacyl-CoA racemase (AMACR),and negative expressions for MA included CD10,neuron-specific enolase (NSE) and CD56.Follow-up information from 1 to 125 months was available in all the patients;and none of the patients showed any evidence of recurrence and metastasis.Conclusion:The benign tumor characteris-tics of MA are not obvious for preoperative imaging diagnosis,and the diagnosis of MA should be based on the unique pathological features.Positive immunostain of CD57 is a useful indicator for MA diagnosis and differential diagnosis.The partial nephrectomy surgical treatment can achieve good clinical cure with good prognosis.

Objective To analyze the risk factors and correlation between clinical indicators and the four main pathological lesions of IgA ne?phropathy in the Oxford classification:mesangial hypercellularity(M0/1),endocapillary proliferation(E0/1),segmental sclerosis or adhesion(S0/1), and tubular atrophy/interstitial fibrosis(T0/1/2). Methods Clinical and pathological data were collected from 514 patients with biopsy?proven IgA nephropathy admitted in our hospital from February 17,2006 to October 11,2011. These patients were all above 18 years old. Cases with sec?ondary causes of mesangial IgA deposition were excluded,such as Henoch?chonlein purpura,ankylosing spondylitis and psoriasis et al. The inde?pendent risk factors affecting the pathological classification were analyzed by Spearman rank correlation analysis and two?category and multi?classi?fication logistic regression using SPSS 17.0 statistical software. Results In 514 IgAN patients,the ratio of males to females was 1.06:1. The aver?age age was 35.70±11.99 years,and the average disease duration was 18.31±30.42 months. M0E0S0T0 was the major pathologic classification of isolated hematuria. Chronic kidney disease(CKD)stage,24 hours proteinuria,albuminuria,urine transferrin and IgG levels were positively corre? lated with M lesion;serum albumin,C3 and PLT showed a negative correlation with M lesion. Twenty four hours proteinuria and blood platelet count were the independent risk factors for M lesion. As shown by stratified analysis ,the proportion of M1 in cases with 24 hours proteinuria≥3.5 g/d is much higher than that in cases with non?nephrotic range proteinuria. Age,systolic blood pressure,uRBC,24 hours proteinuria,albuminuria urine transferrin and IgG levels were positively correlated with E lesion,Duration,serum albumin showed a negative correlation with E lesion. Age and duration of nephritis were independent risk factors for E lesion. 73.3%of patients that above 60 years old showed endothelial proliferation. CKD stage,24 hours proteinuria were positively correlated with S lesion. Age,CKD stage,systolic blood pressure,diastolic blood pressure,C4,TC, LDL?C,CRP,Fib,UA,Cys?C and 24 hours proteinuria,urineβ2?microglobulin,albumin,transferrin and IgG levels were positively associated with T lesion;hemoglobin,serum albumin,serum IgG showed a negative correlation with T lesion. Infection history,high CRP levels,DBP more than 90 mmHg,hypoalbuminemia,high low density lipoproteinemia,and anemia were independent risk factors for T lesion. Conclusion Twenty four hours proteinuria,blood platelet count,age,duration of nephritis,hypoalbuminemia,anemia,hyperlipidemia,DBP≥90 mmHg and high CRP lev?els were risk factors for the Oxford classification of IgA nephropathy. Renal biopsy should be carried out in time to make clear the pathological clas?sification and individual treatment,so as to improve the prognosis.