ObjectiveTo measure the displacement parameters of the femoral head in space through CT three-dimensional reconstruction so as to re-understand impacted femoral neck fractures.MethodsFifty patients with impacted femoral neck fractures were included in the study.There were 17 males and 33 females.Bilateral proximal femurs of each patient were scanned by spiral CT preoperatively.Then these primitive CT data were reconstructed by Mimics 10.01 software.Registered the normal femur and fracture mirror model,the registered mirror model was generated a new mask in the CT cross-sectional images,marked key points in the masks and measured the displacement parameters of femoral head with three-dimensional measurement technology.ResultsIn the impacted femoral neck fractures,the femoral head displacement angle was 17.17°±10.40°,70％(35/50) of the patients had femoral head rotation angle was at 10° to 35°,and 30％(15/50) of the patients had femoral head space displacement more than 20°.The average displacement distance of femoral head center and the deepest point of fovea capitis were(6.49±3.60) mm and(10.42±5.92) mm,respectively.A high proportion of the impacted femoral neck fractures had a large of displacement in the three-dimensional space.It is not scientific to equal impacted femoral neck fractures to undisplaced fractures.ConclusionThree-dimensional reconstruction and digital measurement is a precise,efficient and convenient method for the measurement of femoral head displacement parameters in femoral neck fracture patients.The classic Garden classification for impacted femoral neck fractures has certain defects and limitations.Clinicians should re-understand impacted femoral neck fractures and choose more reasonable treatment.

Objective To investigate genes and involved biological processes closely associated with stem cell markers of colorectal cancer-epithelial cell adhesion molecule (EpCAM) + and CD44+.Methods By the bioinformatics method,with microarray data of colorectal cancer from gene expression omnibus (GEO) database and R2 platform,the genes significantly related with CD44 and EpCAM expression were screened out.The differences in expression of related genes were analyzed on the basis of gender,family history of cancer,alcohol and Dukes stage.The expression of related genes in colorectal cancer was compared with that of other tumors and healthy subjects.At same time,the pathways of the genes and Kyoto encyclopedia of genes and genomes (KEGG) of CD44 and EpCAM significantly related genes were analyzed with gene ontology (GO) and KEGG method.Single factor analysis of variance and Chi-square test of four-fold table with correction for continuity were used for statistical analysis by R2 platform embedded statistical tools.Results The expressions of CD44 and EpCAM were detected in all 315 colorectal cancer samples.A total of 888 and 6 316 genes were screened out which were significantly associated with CD44 and EpCAM expression.CD44 was positively correlated with EpCAM.There was no obvious correlation between the expression of five genes which expressed in all 315 tissues and gender family history of cancer,alcohol and Dukes stage (all P＞0.05).By further compared with the expression in other tumors and tissues,the expressions of two genes solute carrier family 12,member 2 (SLC12A2) and proteome of centriole 1 centriolar protein B (POC1B) in colorectal tumor were significantly higher than that in other tumors (F=289.422、128.456,all P＜0.01),and its expression in colorectal cancer was obviously higher than that in tissues of health subjects (F=349.519、128.456,all P＜0.01).GO analysis indicated there were 15 GO semantics related with both CD44 and EpCAM.The genes related with CD44 and EpCAM were analyzed by KEGG access pathway method,while seven and 10 pathways were found to be statistically significant (all P＜0.01).Conclusions CD44 and FpCAM commonly expressed in colorectal cancer.The genes related with CD44 and EpCAM expression are involved in multiple tumor biological processes.

Abstract: Objective　To find out the existing problems and provide reference for further improving the quality of report information by analyzing the report cards of COVID-19 and the positive report cards of primary screening reported in Ningxia. Methods　All COVID-19 case cards from 2020 to 2021 and initial screening positive cards were derived from the Chinese Information System for Disease Control and Prevention according to final review date. The timeliness of case reporting, timeliness of case review, completeness and accuracy of the case cards were analyzed. Results　In Ningxia, the first case of COVID-19 was reported on January 20, 2020, and as of December 31, 2021, 122 confirmed cases and 4 symptomatic infected cases were reported. In 2021, the timely reporting rate of COVID-19 was 98.00%, which increased by 8.24% compared with 2020 (90.54%). Compared with 2020, the average time limit for diagnosis to reporting of COVID-19 in 2021 was shortened by 83.12%; in 2021, the timely review rate of COVID-19 was 100.00%, which increased by 13.84% compared with 2020 (87.84%). Compared with 2020, the time from reporting to final review was shortened by 98.91%. In 2021, the timely rate of positive reports in COVID-19 in Ningxia was 90.00%, among which the timely rate of reports by county (district) nucleic acid detection institutions was the highest (92.31%), followed by municipal (91.67%) and autonomous region (81.82%). Conclusions　At the beginning of the epidemic in 2020, the timeliness of COVID-19 in Ningxia was poor, and through the implementation of measures such as technical training, supervision and inspection to continuously optimize the staffing of medical institutions and disease control institutions, the timeliness of reporting COVID-19 in Ningxia in 2021 was substantially improved, but there were still some weak links. In the future work, technical guidance and training should be carried out for weak links, and efforts should be made to improve the quality of reports.

Objective To investigate the method of dermal-fat graft combined with secondary autologous fat transplantation in repairing severe facial depression and to evaluate the clinical effects.Methods Twelve cases of facial depression had been repaired by the transplantation of dermal-fat flap which was removed from the abdomen at the first stage.They were given fat granules injection 1 to 3 times postoperatively,and 3,6 and 3 patients were given fat granules injection three times,twice and once,respectively,with the interval period of 3 to 6 months.The result was based on comparison of the photos taken from preoperation and postoperation.Results All patients were healed primarily except one of which was formed hematoma after operation and scavenged thereafter.After 6 months to 2 years follow-up,all the patients had satisfactory facial contour.Conclusions Combined autologous fat granules with free dermal-fat graft to reconstruct severe facial depress is an easy,safe and effective technique and deserves to be recommended.

Objective To compare the diagnostic value of adenosine and exercise stress myocardial perfusion imaging (MPI) for detecting coronary heart disease (CHD) in women. Methods One hundred and thirty-eight patients with CHD were randomly divided into two groups: adenosine stress group (n = 69)and exercise stress group (n = 69). All patients underwent myocardial SPECT evaluation. Coronary angiography (CAG), referred as "gold standard" , was performed in each patient within 1 week before or after MPI. The diagnostic value of the two stress MPI was compared with χ2 test or Fisher's exact test. Results In adenosine stress group, the sensitivity, negative predictive value and accuracy were 88.2% (45/51),72.7% (16/22), 88.4% (61/69), respectively, which were not significantly different from those of the exercise stress group (91.7% (44/48), 66.7% (8/12), 81.2% (52/64); χ2 =0. 571, 0. 714, 0.249, P >0.05). However, the false positive rate of adenosine stress (11.1%, 2/18) was significantly lower than that of exercise stress (50.0%, 8/16), P = 0.023. Conclusions Adenosine and exercise stress MPI have similar value for CHD diagnosis in women, however, adenosine stress MPI may have an advantage of low false positive rate.

Objective To evaluate the expression of WWOX gene in breast cancer and its relation to hypermethylation of WWOX gene CpG island. Methods The expression of WWOX protein was evaluated by immunohistochemical staining in breast cancer cell line and breast cancer tissues.Methylation specific PCR(MSP)was used to check whether it Was methylated in the promoter and exon 1 of WWOX.Results Deletion in the WWOX expression was observed more frequently in invasive breast tumors,(32.2%)than normal breasttissues(5.4%)(P＜0.01).20.3% of premenopause eases were completely negative for WWOX expression compared to 57.2% of postmenopause breast carcinomas(P＜0.01).Furthermore,23.1% of Stage Ⅰ(6/26),28.6%of Stage Ⅱ(10/35),46.2%of Stage Ⅲ(12/26)tunlors showed negative WWOX protein expression.In breast cancer specimens.methylation rate of promoter and exon 1 CpG island of WWOX gene was 55%and 45%respectively.Whereas.WWOX CpG islands of normal mammary tissues were completely unmethylated in all cases.CpG islands of WWOX promoter and exon 1 were methylated in MDA-MB-231 cell line but not MCF-7 cell.Conclusions Some deletion in WWOX expression is common in breast cancer and methylation of WWOX DNA CpG islands plays a crucial role in the silence of WWOX.WWOX may play a role in the carcinogenesis and development of breast cancer.

Objective To Discuss the impacts of different dosage of atorvastatirs on serum hsCRP,IL-10 and MCP-1 levels on post-intervention patients with coronary stenting. Methods 93 post-intervention patients with coronary stenting were selected and randomly divided into 3 groups.Each group took different dosage of oral atorvastatins after the operation for more than one week.The dosage for each group was 10 mg,20 mg and 40 mg,respectively.Each patient was phlebotomized for three times,which are 24 hours before the operation,24 hours after the operation and one week after the operation.Serum MCP-1,IL-10 and hs-CRP levels were measured by enzyme linked immunosorbent assay(ELISA)and immunoturbidimetry(ITM). Results Serum hs-CRP and MCP-1 levels of post-intervention patients were significantly higher than those of pre-intervention.This illustrated that the serum hsCRP and MCP-1 levels were closely related to PCI.Serum hs-CRP and MCP-1 levels decreased in those patients one week after operation which proves they are negatively correlated with the dosage of atorvastatins.There was no statistic evidence to prove the correlation between different dosage of atorvastatins and the level of serum IL-10.The ratio of MCP-1/IL-10 at 24h post-intervention patient was significantly higher than pre-intervention,which proves the ratio was negatively correlated with the dosage of atorvastatins. Conclusion Atorvastatins decreases serum MCP-1 and hs-CRP levels after PCI.Serum MCP-1 and hs-CRP levels were negatively correlated with the dosage of atorvastatins.

Background:Bioinformatics is an effective technology for microarray data mining and gene function prediction. Aims:To analyze the gene CRELD2 that associated with pathogenesis,disease activity and efficacy of biological agents in ulcerative colitis( UC)by bioinformatics to provide a theoretical basis for subsequent studies on its biological function and molecular mechanism in the development and progress of UC. Methods:The microarray data associated with pathogenesis, disease activity and efficacy of biological agents in UC were downloaded from the Gene Expression Omnibus( GEO database);the data mining and analyses were conducted by using bioinformatics tools such as BRB-ArrayTools, ProtParam,ELM,SignalP 4. 1,PBIL-IBCP Lyon Gerland,GO and STRING. Results:Cross-over analyses revealed that expressions of four genes(CDC25B,CRELD2,IL1RN,PITPNC1)were up-regulated in the order from colonic mucosa of healthy subjects,un-inflamed mucosa of active UC patients to inflamed mucosa of active UC patients,meanwhile these four genes were significantly down-regulated in infliximab responders after treatment when compared with that before treatment and infliximab non-responders. The function of CRELD2 gene was unknown. Bioinformatics analyses showed that CRELD2 gene was located on the long arm of chromosome 22(22q13. 33),and encoded a secreted protein composed of 402 amino acids. This protein contained several epidermal growth factor( EGF)-like domains,mainly distributed in Golgi apparatus, endoplasmic reticulum and extracellular site and had calcium- and protein-binding effect. Interactions existed between CRELD2 and CHRNA4,CHRNB2 and RHBDD3 proteins. Conclusions:Gene CRELD2 may have EGF-like biological function and via participating directly or indirectly the regulation of immunocytes to affect the pathogenesis and disease activity of UC. It might be used as a biomarker for diagnosis and assessment of disease activity and therapeutic efficacy of UC. Furthermore,it might be a potential target for treatment of UC.

Objective To explore the value of fluid-attenuated inversion recovery (FLAIR)sequence and gradient echo T2 ?weighted image (GRE-T2 ? WI)in diagnosis of acute traumatic extra-axial hemorrhage.Methods 50 patients who were diagnosed as acute traumatic extra-axial hemorrhage by plain CT underwent FLAIR and GRE-T2 ? WI in acute stage.The diagnosis consistency (Kappa ),detection rate of subarachnoid hemorrhage(SAH),epidural hemorrhage(EDH)and subdural hemorrhage(SDH)were compared.The detection rates of SAH in 8 locations among FLAIR,GRE-T2 ? WI and combination of two sequences were analyzed by Chi-square test.Results 48 patients were enrolled in the study.The diagnosis consistency of SAH between FLAIR and GRE-T2 ? WI was high (k =1.0).The detection rate of SAH was 100% for both FLAIR and GRE-T2 ? WI.Comparing with GRE-T2 ? WI and combi-nation of two sequences,FLAIR tended to misdiagnose SAH in perimesencephalic cistern (P <0.05).The diagnosis consistency of EDH between FLAIR and GRE-T2 ? WI was high (k =1.0).3 patients with EDH were all detected by FLAIR and GRE-T2 ? WI. The diagnosis consistency of SDH between FLAIR and GRE-T2 ? WI was high (k =0.943).The detection rate of 12 patients with SDH was 100% in FLAIR,and 1 patient with SDH was missed by GRE-T2 ? WI.Conclusion The detection rate of acute traumatic extra-axial hemorrhage is high for both FLAIR and GRE-T2 ? WI.Combination of two sequences can improve the accuracy of acute traumatic extra-axial hemorrhage in clinic.

BACKGROUND:Early vascularization is crucial for wound healing. A high-porosity, macrovoid alogeneic skin leads to the rapid vascularization and celular infiltration.
OBJECTIVE: To obtain a new alogeneic skin product with high porosity, good cel permeability and good histocompatibility using an improved preparation method of human acelular dermal matrix.
METHODS: Cel components of healthy human skins were removed by the improved method and the traditional method, respectively. The improved method was to remove the subcutaneous fat, eliminate the epidermis (1 mol/L NaCl solution at 37℃ for 24 hours) folowed by shaking processing (2% NaOH at 45℃ for 4 hours), and then, the solution was neutralized with PBS rinsing, dried and stored at 4℃ for standby. We detected the porosity and degradation time in vitroof the acelular dermal matrices prepared by two methods and the cytotoxicity of the material infiltration liquid on the adipose-derived stem cels. Hematoxylin-eosin staining was used for the detection of the cel residual, the integrity of colagen and cel biocompatibility. Scanning electron microscopy was used to detect the pore size.
RESULTS AND CONCLUSION: Both the two methods could completely remove the cel components, and maintain the integrity of the colagen scaffold. The porosity of acelular dermal matrix with the improved method was (93.22±0.99)%, which was significantly higher than that with the traditional method [(74.28±2.06)%;P < 0.001]. However, there was no significant difference in in vitrodegradation time between the two kinds of acelular dermal matrices(P > 0.05). No obvious cytotoxicity of the acelular dermal matrix prepared with the improved method was detected. At 3-7 days of co-culture, the adipose-derived stem cels cultured on the acelular dermal matrix prepared with the improved method could penetrate the basement membrane to the deep dermis, while there was no obvious cel invasion and growth in the deep dermis prepared by the traditional method. Compared with the traditional method, the improved method is more suitable for cel infiltration and growth with higher porosity and larger pore size.