Repurposed benzydamine targeting CDK2 suppresses the growth of esophageal squamous cell carcinoma / 医学前沿

Esophageal squamous cell carcinoma (ESCC) is one of the leading causes of cancer death worldwide. It is urgent to develop new drugs to improve the prognosis of ESCC patients. Here, we found benzydamine, a locally acting non-steroidal anti-inflammatory drug, had potent cytotoxic effect on ESCC cells. Benzydamine could suppress ESCC proliferation in vivo and in vitro. In terms of mechanism, CDK2 was identified as a target of benzydamine by molecular docking, pull-down assay and in vitro kinase assay. Specifically, benzydamine inhibited the growth of ESCC cells by inhibiting CDK2 activity and affecting downstream phosphorylation of MCM2, c-Myc and Rb, resulting in cell cycle arrest. Our study illustrates that benzydamine inhibits the growth of ESCC cells by downregulating the CDK2 pathway.

Distribution of anti-neutrophil cytoplasmic antibody in patients with cardiovascular and cerebrovascular diseases / 中华微生物学和免疫学杂志

Objective:To investigate the distribution features of anti-neutrophil cytoplasmic antibody (ANCA) in patients with cardiovascular and cerebrovascular diseases and the clinical characteristics of the patients.Methods:Clinical data of 6 759 patients who were treated in Baoding No.1 Central Hospital for cardiovascular and cerebrovascular diseases during January 2015 to July 2019 were collected and analyzed. ANCA was detected by indirect immunofluorescence (IIF). Antibodies against myeloperoxidase (MPO) and protease 3 (PR3) were detected by enzyme-linked immunosorbent assay (ELISA).Results:IIF showed that 558 out of the 6 759 cases tested positive for ANCA with a positive rate of 8.26%. Among them, 382 (68.46%) were positive for perinuclear ANCA (p-ANCA) and 176 (31.54%) were positive for cytoplasmic ANCA (c-ANCA). Anti-MPO and anti-PR3 antibodies were detected in 69 ANCA-positive cases, while the antibodies against other target antigens were detected in 489 cases. The ratio between the two groups was 1∶7.09. The incidence of recurrent respiratory tract infection and pulmonary interstitial lesions in ANCA-positive cases was 69.35% (387/558) and 64.52% (360/558), respectively, which was significantly higher than that in ANCA-negative patients [40.51% (2 512/6 201) and 33.17% (2 057/6 201)].Conclusions:Anti-MPO and anti-PR3 antibody detection could not replace IIF to detect total ANCA for a high rate of missed diagnosis would be caused. Early detection of ANCA would be of great significance to patients with chronic cardiovascular and cerebrovascular diseases.

Significance of Nek8 expression in esophageal squamous cell carcinoma / 重庆医学

Objective To investigate the expression of Nek8 in esophageal squamous cell carcinoma(ESCC) tissues and cell line , and to evaluate its correlation with the clinicopathological features of ESCC and the survival rate of ESCC patients after operation . Methods The expression of Nek8 mRNA in human ESCC Eca109 cell line and two pairs of ESCC tissues and adjacent normal e‐sophageal mucosal epithelium were detected by semi‐quantitative reverse transcription polymerase chain reaction (RT‐PCR) .Immu‐nohistochemistry and tissue microarray technique were used to examine the expression of Nek 8 protein in ESCC tissues and tumor‐adjacent tissues .The correlation between Nek8 expression and clinicopathological features of ESCC and survival rate of ESCC pa‐tients was then analyzed .Results The expression of Nek8 mRNA was positive in Eca109 cells and two cases of ESCC tissue ,and it was negative in paired normal esophageal mucosal epithelium specimens .In tissue microarray ,the expression of Nek8 protein in ES‐CC tissues ,which was mainly in the cytoplasm ,was significantly higher than that in tumor‐adjacent tissues(P= 2 .16E‐13) .The high expression of Nek8 was associated with tumor size (P=0 .008) ,but not with sex ,age ,histological grade ,infiltration degree , lymph node metastasis ,and the survival rate(P>0 .05) .Conclusion The expression of Nek8 is up‐regulated in ESCC tissues and cell line ,and may be involved in tumorigenesis and development of ESCC .Nek8 could act as a potential biomarker for ESCC diag‐nose and target for therapy .

Practice of lean management in optimization of emergency operation process / 中华医院管理杂志

Lean management,when introduced to optimize emergency operations,may improve medical service.It has been proved in practice that ideas and methodology of lean management guarantee emergency services by ensuring safety and quality of emergency operation process.In addition,it minimizes costs and enhances the business and social efficiency of the hospital.

Evaluation of markers associated with primary biliary cirrhosis in a population of anti-mitochondrial antibody-M2-positive individuals / 中华肝脏病杂志

<p><b>OBJECTIVE</b>To explore the distribution of the main clinical symptoms and signs of primary biliary cirrhosis (PBC) in a population of individuals with positivity for anti-mitochondrial antibody-M2 (AMA-M2).</p><p><b>METHODS</b>A total of 20 970 persons who participated in routine health examinations at our hospital were tested for presence and level of antinuclear antibodies (ANAs) using an indirect immunofluorescence (IIF) assay and of AMA-M2 by western blotting. The chi-square test was used for statistical analysis.</p><p><b>RESULTS</b>Titers of ANAs more than 1:320 were detected in 1 243 of all the study participants, with 156 of those individuals having detectable AMA-M2.The overall rate ofAMA-M2 positivity was 0.74%, with a significantly higher rate among female subjects (males:0.3% (32/10 550) vs.females:1.2% (124/10 420); x2=55.85, P less than 0.05). Among the AMA-M2-positive population there were 66 cases of abnormal liver function, 58 cases of increased alkaline phosphatase, 72 cases of abnormal findings for routine blood testing, 47 cases of gallbladder disease history, 49 cases of diabetes history, 22 cases of allergy, 75 cases of abdominal discomfort, 38 cases of weakness, 3 cases of jaundice, and 11 cases of pruritus. There were significant differences between the AMA-M2-negative individuals and the AMA-M2-positive individuals.</p><p><b>CONCLUSION</b>Among the general population, individuals with substandard states of health, such as those with abnormal findings in routine blood tests and abnormal liver function, should be screened for AMA-M2. This screening will facilitate early diagnosis of PBC and timely initiation of disease management, improving the patient's life quality of life and prolonging their life.</p>

Analysis of the distribution of antinuclear antibodies in a healthy population / 中华微生物学和免疫学杂志

Objective To study the distribution of antinuclear antibodies ( ANAs) in a healthy population and the significance of using ANAs screening test in medical examination .Methods The ANAs were measured by indirect immunofluorescence assay ( IIF) .The Western blot assay was used to detect fif-teen specific antibodies against auto-antigens .Results 3519 out of all 25 110 subjects showed ANAs titers>1∶100 , and among them male and female subjects were respectively accounted for 1143 and 2376 .1489 out of all subjects had ANAs titers >1∶320 , and among them male and female subjects were respectively accounted for 406 and 1083 .The positive rates of ANAs at different titers showed significant differences be -tween male and female subjects .Among subjects with ANAs titers >1∶320 , the number of male subjects showed a steady increase with the age , while the percentage of female subjects reached to two peaks during the periods of puberty and menopause .The fifteen specific antibodies were detected in 659 out of 1489 sub-jects with ANAs titers>1∶320 and anti-Ro-52 (14.2%) accounted for the majority , followed by anti-M2 (12.7%) and anti-SSA (9.6%).Conclusion ANAs can be detected among healthy population of all ages, but their distribution varied with gender and age .ANAs screening test is necessary for medical exami-nation of healthy population , especially for female during period of puberty or menopause .The population with positive ANAs should be followed-up closely and educated for the prevention of autoimmune diseases .

The discussion of laboratory animal science curriculum in medicine colleges and universities construction / 中华医学教育探索杂志

The laboratory animal science, a comprehensive discipline researching on experimental animal and animal experimentation, is the life sciences research foundation and the support condition. It has very vital significance to sudy the related discipline especially the life sciences. This article discusses the construction of the status of Laboratory Animal Science course combined with the development of laboratory animal science and contacted with the characteristics of medical colleges and related disciplines.

Study on early diagnostic methods for sub-clinical hepatic encephalopathy / 临床神经病学杂志

Objective To investigate the early diagnostic methods for sub-clinical hepatic encephalopathy (SHE).Methods 46 hepatocirrhosis patients without hepatic encephalopathy (SHE group) were recruited to perform P300, brainstem auditory evoked potential (BAEP), numeral connection teat (NCT),mini-mental state examination (MMSE)and electroencephalogram (EEG), compared with 43 unhepatopathy patients (control group) and within following up.Results The P300 delitescence and the NCT value in SHE group were obviously longer than those of the control group (allP