Objective To estimate time of gauze swabs left in abdomen with comparison of the number of foreign body giant cells,theirs nuclei and the proportion of type Ⅰ collagenous fibers to type Ⅲ and argentaffin fibers in different times.Methods F344 rat models dependent 2,8,30,120 days were established by gauze swab fixed in the abdomen,and were studied on gauze swab wrapped by greater omentum,the number of foreign body giant cells and theirs nuclei by HE staining,and the proportion of type Ⅰ collagenous fibers to type Ⅲ and argentaffin fibers by sirius red and silver staining respectively.The results were analyzed by image analysis system.Results The results showed that number of foreign body giant cells,theirs nuclei and the proportion of type Ⅰ collagenous fibers to type Ⅲ and argentaffin fibers increased gradually(P<0.01)followed the time delayed.The Proportion of type Ⅰ collagenous fibers to argentaffin fibersis Power Function of Days of guaze swab left in rat abdomen(r=0.972).Conclusion The number of foreign body giant cells,theirs nuclei and the proportion of type Ⅰ collagenous fibers to type Ⅲ and argentaffin fibers contribute to the estimation of foreign body(eg.gauze swab)left in abdomen.

OBJECTIVETo design and improve signal processing algorithms of ophthalmic ultrasonography based on FPGA.

METHODSAchieved three signal processing modules: full parallel distributed dynamic filter, digital quadrature demodulation, logarithmic compression, using Verilog HDL hardware language in Quartus II.

RESULTSCompared to the original system, the hardware cost is reduced, the whole image shows clearer and more information of the deep eyeball contained in the image, the depth of detection increases from 5 cm to 6 cm.

CONCLUSIONThe new algorithms meet the design requirements and achieve the system's optimization that they can effectively improve the image quality of existing equipment.

Algorithms ; Data Compression ; Diagnostic Imaging ; Ophthalmology ; Signal Processing, Computer-Assisted ; Ultrasonography

Objective To Screen for safe and effective vaccine candidates for EV71,provide a theoretical basis for development of EV71 vaccines in the future.Methods VP1 gene of enterovirus was used to design a target for development of EV71 vaccines.Different vaccine candidates,including inactivated EV71 vaccines,VP1 protein vaccine,DNA vaccines of different doses,were used to challenge female BALB/c mice by intramuscular injection at baseline (0),2 weeks,4 weeks,and caudal vein blood was collected at 0,2,4,6,8,10,and 16 weeks,and BALB/c mice were sacrificed and the spleen cells were collected for detection of both humoral immunity and cellular immunity to evaluate the efficacy and safety of the vaccine candidates.Results IgG antibody titers were increased at 2 weeks,remarkably increased at 4 weeks,reached a peak at 8 weeks,at least sustained for 16 weeks during the whole observation period,subtypes of IgG1 and IgG2a were the major component.The three vaccines could induce cellular immunity characterized by EV71 specific γ-IFN and IL-4 production.Our results indicated that inactivated EV71 vaccine was superior to the other vaccine candidates.Conclusions Inactivated EV71 vaccines,VP1 protein vaccine,DNA vaccines can induce both strong and sustainable humoral and cellular immunities in challenged mice,and the inactivated EV71 vaccine is superior to the other vaccine candidates,which needs to be proved their immunity by challenge assay in the future.

AIM:To establish and characterize the patient-derived esophageal squamous-cell carcinoma xeno-graft (PDECX) in mice.METHODS:The samples of human esophageal cancer were grafted into severe combined immu-nodeficient ( SCID) mice.The xenografts were transferred to SCID mice when the first passage of xenografts grew up .The growth of tumors in the first, second and third passages was observed .HE staining was performed.The expression of CK5/6, p63 and p40 in the patient samples , and the first and third passages of the xenografts were detected by immunohisto-chemical analysis.The expression of mTOR, p-mTOR, p70S6K, p-p70S6K, Akt1, p-Akt (Ser473), Erk1/2 and p-Erk1/2 were determined by Western blot .RESULTS:The PDECX was successfully established .The positive expression of CK5/6, p63 and p40 in the xenografts was consistent with that in the patients ’ samples.The levels of phosphorylated and total proteins of proliferation-related signaling pathways were different in the xenografts from different patients .CONCLU-SION:The PDECX model adequately reflects the tumal heterogeneity that is observed in the patients .

Objective : To investigate the factors affecting concurrent sarcopenia among patients with cardiovascular diseases, so as to provide insights into early identification and prevention of cardiovascular diseases complicated with sarcopenia. Methods: A total of 250 inpatients with cardiovascular diseases in the Sixth Division Hospital of Xinjiang Production and Construction Corps were recruited and divided into the sarcopenia and non-sarcopenia groups according to the diagnostic criteria of sarcopenia. Subjects' basic characteristics, body mass index, blood biochemical indicators and human body composition parameters were collected using questionnaire surveys, and factors affecting concurrent sarcopenia among patients with cardiovascular diseases using a multivariable logistic regression model. Results: Among the 250 patients with cardiovascular diseases, there were 149 males (59.60%) and 101 females (40.40%). The overall prevalence of sarcopenia was 8.40% among the study subjects. The mean age and body mass index were (75.19±9.74) and (20.77±2.19) kg/m2 in the sarcopenia group and (65.24±11.50) years and (25.85±2.87) kg/m2 in the non-sarcopenia group. Multivariable logistic regression analysis identified age (OR=1.115, 95%CI: 1.030-1.207) and body mass index (OR=0.582, 95%CI: 0.445-0.761) were as factors affecting concurrent sarcopenia among patients with cardiovascular diseases. Conclusion Advanced age and low body mass index may increase the risk of concurrent sarcopenia among patients with cardiovascular diseases.

OBJECTIVETo evaluate the method of array-based comparative genomic hybridization (array-CGH) in identifying unbalanced chromosome aberrations.

METHODSFour cases that could not be diagnosed by conventional cytogenetic technique were selected to undergo array-CGH analysis. DNA samples were extracted and hybridized with the Affymetrix SNP 6.0 arrays using Human Mapping SNP6.0 assay kit following the manufacturer's standard protocol. The data were analyzed by two professional software packages, GCOS and Genotyping Console.

RESULTSBy using array-CGH technique, all the four cases were diagnosed precisely through identifying two duplications and two complex derivative chromosomes.

CONCLUSIONArray-CGH is an effective method for whole-genome identification of unbalanced chromosomal aberrations with high sensitivity and specificity. It has a great value to investigate the correlations between genotype and phenotype in clinical service, especially in prenatal diagnosis.

Adolescent ; Adult ; Cells ; cytology ; Child, Preschool ; Chromosome Aberrations ; Comparative Genomic Hybridization ; methods ; Genetic Diseases, Inborn ; diagnosis ; genetics ; Humans ; Infant ; Male ; Young Adult

Objective:To compare the prenatal diagnosis and pregnancy outcome of increased nuchal translucency (NT) with or without nuchal cystic hygroma (CH) in fetuses with first-trimester NT ≥5 mm.Methods:Data from 131 fetuses with NT ≥5 mm who received invasive prenatal diagnosis at Guangzhou Women and Children's Medical Center from July 2017 to December 2020 were retrospectively collected and analyzed. Those with a septum in the cyst were grouped as NT with CH group ( n=57), and those without as increased NT without CH group ( n=74). Genetic test results, incidence of structural malformations, survival rate after birth were compared using Chi-square test or Fisher's exact test and non-parametric test. Results:There was no significant difference in the incidence of fetal genetic abnormalities[67.6%(50/74) vs 61.4%(35/57), χ 2=0.54, P=0.464], ultrasonic structural malformations [21.6%(16/74) vs 33.3%(19/57), χ 2=2.26, P=0.133], or in the survival rate (12/14 vs 3/8, P=0.053) between increased NT without CH group and NT with CH group. Conclusions:For increased NT with or without CH, although the two groups had different spectrum of disease, they had a high incidence of chromosomal abnormalities and structural malformations, and both groups had a certain healthy survival rate after birth.

Objective To design and improve signal processing algorithms of ophthalmic ultrasonography based on FPGA. Methods Achieved three signal processing modules: full parallel distributed dynamic filter, digital quadrature demodulation, logarithmic compression, using Verilog HDL hardware language in Quartus II. Results Compared to the original system, the hardware cost is reduced, the whole image shows clearer and more information of the deep eyebal contained in the image, the depth of detection increases from 5 cm to 6 cm. Conclusion The new algorithms meet the design requirements and achieve the system’s optimization that they can effectively improve the image quality of existing equipment.

17q12 deletion syndrome is a rare autosomal dominant disorder affecting multiple organ systems caused by the deletion of DNA fragments approximately 1.4～1.8 Mb in band 2 of region 1,the long arm of chromosome 17,including hepatocyte nuclear factor 1B.The clinical manifestation of the disease ismaturity-onset diabetes of youth type 5,abnormalities in renalstructure or function,as well as in neurodevelopment or psychiatric systems.

Tumor-associated tertiary lymphoid structures(TLSs)are ectopic lymphoid formations within tumor tissue,with mainly B and T cell populations forming the organic aggregates.The presence of TLSs in tumors has been strongly associated with patient responsiveness to immunotherapy regimens and improving tumor prognosis.Researchers have been motivated to actively explore TLSs due to their bright clinical application prospects.Various studies have attempted to decipher TLSs regarding their formation mechanism,structural composition,induction generation,predictive markers,and clinical utilization.Meanwhile,the scientific approaches to qualitative and quantitative descriptions are crucial for TLS studies.In terms of detection,hematoxylin and eosin(H&E),multiplex immunohistochemistry(mIHC),multiplex immunofluorescence(mIF),and 12-chemokine gene signature have been the top approved methods.However,no standard methods exist for the quantitative analysis of TLSs,such as absolute TLS count,analysis of TLS constituent cells,structural features,TLS spatial location,density,and maturity.This study reviews the latest research progress on TLS detection and quantification,proposes new directions for TLS assessment,and addresses issues for the quantitative application of TLSs in the clinic.