Objective To investigate the expression of proliferating cell nuclear antigen(PCNA),vascular endothelial growth factor(VEGF) and microvessel density(MVD) in squamous cell carcinoma;and to explore the relationship between their expression and tumor biological behavior.Methods The expressions of PCNA,VEGF and MVD were analyzed by immunohistochemical method in 71 cases of esophageal squamous cell carcinoma.Results The intensity positive rate of PCNA indicated close relationship between cell differentiation and lymph node metastasis(P

BACKGROUND: Breast augmentation with polyacrylamide hydrogel injection has been used nearly for a decade in some Chinese medical therapy units. More patients need to be removing injections or a second augmentation due to complications. More attention should be paid for possibility of complications concomitant with breast malignant tumor. OBJECTIVE: Two cases of breast invasive duct carcinoma diagnosed after removing injection were analyzed retrospectively in order to increase the importance of detection rate of breast malignant tumor. METHODS: Two cases in all 41 assembled patients which were removed polyacrylamide hydrogel injections from 82 breasts were diagnosed with invasive carcinoma. The characteristics of medical history, physical diagnosis, image diagnosis and pathological examination were analyzed retrospectively. RESULTS AND CONCLUSION: The detection rate of breast malignant tumor should arise more attention in patients requiring removal of polyacrylamide hydrogel injection. The following aspects should be emphasized such as the comprehensive analysis for the results of physical diagnosis and image diagnosis, tumor-free operation with more samples from suspicious nodules and frozen pathological examination. The principles of cancer surgery should be followed in pathological diagnosed cases in case of iatrogenic metastasis and spread of breast malignant tumor.

Aim To determine the neuroprotective effect of sulfated pachymaran (SP)on MPTP-induced
mouse model.Method ICR mice were randomly di-vided into control group,MPTP group and SP treatment group (50,1 00,1 50 mg·kg -1 ,ip).After 1 7 days, the activities of endogenous antioxidants (SOD,GSH-Px,CAT),antisuperoxide anion,hydrogen peroxide and MDA content in the midbrain and cortex were as-sayed.Results The results proved that SP significant-ly reduced the content of MDA and H2 O2 ,regulated
the activities of antioxidant enzyme and increased the activity of antisuperoxide anion.Conclusion All these effects indicate that SP is a potential neuroprotective a-gent and its neuroprotective effects are achieved in the MPTP mouse model.

Objective: To investigate the characteristics of acoustic impedance test and its diagnostic role for occupational noise induced deafness, in order to provide an objective basis for the differential diagnosis of occupational noise induced deafness. Methods: A retrospective study was conducted to investigate the cases on the diagnosis of occupational noise-induced deafness in Guangdong province hospital for occupational disease prevention and treatment from January 2016 to January 2017. A total of 198 cases (396 ears) were divided into occupation disease group and non occupation disease group based on the diagnostic criteria of occupational noise deafness in 2014 edition, acoustic conductivity test results of two groups were compared including tympanograms types, external auditory canal volume, tympanic pressure, static compliance and slope. Results: In the occupational disease group, 204 ears were found to have 187 ears (91.67%) of type A, which were significantly higher than those in the non occupational disease group 143/192 (74.48%) , the difference was statistically significant (χ²=21.038, P<0.01). Detection of Ad or As type, occupation disease group in other type were 16/204 (7.84%) , 3/204 (1.47%) , were lower than Ad or As type of occupation disease group (15.63%) , other type (9.38%) , the differences were statistically significant[ (χ²=5.834, P<0.05) , (χ²=12.306, P<0.01) ]. Occupation disease group canal volume average (1.68±0.39) ml higher than that of non occupation disease group (1.57±0.47) ml, the difference was statistically significant (t=2.756, P<0.01) ; occupation disease group mean static compliance (1.06±0.82) ml higher than that of non occupation disease group (0.89±0.64) ml. The difference was statistically singificant (t=2.59, P<0.01) . Conclusion We observed that acoustic impedance test had obvious auxiliary function in the differential diagnosis of occupational noise induced deafness, More than 90% of the confirmed cases showed an A-form tympanograms, it is one of the objective examination methods which can be used in the differential diagnosis of pseudo deafness.

Objective: Study of the results and the degree on occupational noise-induced deafness in-to the different high frequency hearing threshold weighted value, in order to provide theoretical basis for the re-vision of diagnostic criteria on occupational noise-induced deafness. Methods: A retrospective study was con-ducted to investigate the cases on the diagnosis of occupational noise-induced deafness in Guangdong province hospital for occupational disease prevention and treatment from January 2016 to January 2017. Based on the re-sults of the 3 hearing test for each test interval greater than 3 days in the hospital, the best threshold of each frequency was obtained, and based on the diagnostic criteria of occupational noise deafness in 2007 edition, Chi square test, t test and variance analysis were used to measure SPSS21.0 data, their differences are tested among the means of speech frequency and the high frequency weighted value into different age group, noise ex-posure group, and diagnostic classification between different dimensions. Results: 1. There were totally 168 cases in accordance with the study plan, male 154 cases, female 14 cases, the average age was 41.18 ±6.07 years old. 2. The diagnosis rate was increased into the weighted value of different high frequency than the mean value of pure speech frequency, the weighted 4 kHz frequency increased by 13.69% (χ²=9.880, P=0.002) , 6 kHz increased by 15.47% (χ²=9.985, P=0.002) and 4 kHz+6 kHz increased by15.47% (χ²=9.985, P=0.002) , the difference was statistically significant. The diagnostic rate of different high threshold had no obvious differ-ence between the genders. 3. The age groups were divided into less than or equal to 40years old group (A group) and 40-50 years old group (group B) , there were higher the diagnostic rate between high frequency weighted 4 kHz (A group χ²=3.380, P=0.050; B group χ²=4.054, P=0.032) , weighted 6 kHz (A group χ²=6.362, P=0.012; B group χ²=4.054, P=0.032) , high frequency weighted 4 kHz+6 kHz (A group χ²=6.362, P=0.012; B group χ²=4.054, P=0.032) than those of speech frequency average value in the same group on oc-cupational noise-induced deafness diagnosis rate, the difference was statistically significant. There was no sig-nificant difference between age groups (χ²=2.265, P=0.944) . 4. The better ear's mean value of pure speech fre-quency and the weighted values into different high frequency of working years on each group were compared, working years more than 10 years group was significantly higher than that of average thresholds of each frequen-cy band in 3-5 group (F=2.271, P=0.001) , 6-10 group (F=1.563, P=0.046) , the difference was statistically significant. The different high frequency weighted values were higher than those of the mean value of pure speech frequency, and the high frequency weighted 4 kHz+6 kHz had the highest frequency difference, with an average increase of 2.83 dB. 5. The diagnostic rate into weighted different high frequency was higher in the mild, moderate and severe grades than in the pure speech frequency. In the comparison of diagnosis for mild occupational noise-induced deafness, in addition to the weighted 3 kHz high frequency (χ²=3.117, P=0.077) had no significant difference, the weighted 4 kHz (χ²=10.835, P=0.001) , 6 kHz (χ²=9.985, P=0.002) , 3 kHz+4 kHz (χ²=6.315, P=0.012) , 3 kHz+6 kHz (χ²=6.315, P=0.012) , 4 kHz+6 kHz (χ²=9.985, P=0.002) , 3 kHz+4 kHz+6 kHz (χ²=7.667, P=0.002) were significantly higher than the diagnosis rate of the mean value of pure speech frequency. There was no significant difference between the two groups in the moderate and se-vere grades (P>0.05) . Conclusion Bring into different high frequency hearing threshold weighted value in-creases the diagnostic rate of occupational noise-induced deafness, the weighted 4 kHz, 6 kHz and 4 kHz+ 6 kHz high frequency value affects the result greatly, and the weighted 4 kHz+6 kHz high frequency hearing threshold value is maximum the effect on occupational noise-induced deafness diagnosis.

This study aims to investigate the effect of transmembrane protein angiotensin converting enzyme 2 (ACE2) on the prognosis of breast cancer and its potential mechanism.Public databases were used to analyze ACE2 expression and its relationship with clinicopathological features and prognosis of breast cancer patients, combined with in vitro experiments to analyze the mechanism of action and immune relevance of ACE2 in breast cancer.Results showed that the expression of ACE2 in breast cancer tissues was significantly lower than that in normal breast tissues, and that its expression was negatively correlated with age, M stage and N1mi stage of breast cancer patients (P < 0.05).Patients with Luminal type breast cancer with high ACE2 expression had poor prognosis, while in the triple-negative breast cancer (TNBC) subtype, ACE2 showed different prognostic significance.In addition, ACE2 is closely associated with the metabolic and immune microenvironment of tumor tissue.In vitro experiments have shown that ACE2 is lowly expressed in MDA-MB-231 cells and may inhibit cell progress by downregulating matrix metalloproteinase 2（MMP2）.The results suggest that the low expression of ACE2 in breast cancer is closely associated with patient prognosis as well as metabolic and immune microenvironment, and that ACE2 may inhibit TNBC cell progress through the MMP2 pathway.

Objective To investigate the prevalence and risk factors of restless leg syndrome (RLS) in hemodialysis patients after kidney transplantation failure.Methods Patients of hemodialysis after kidney transplantation failure were investigated by face-to-face interviews,from March to July,2015,at four dialysis units in Beijing.RLS was diagnosed according to the International RLS Study Group (IRLSSG) criteria.The severity of RLS was assessed using International RLS Rating scale.Besides,three validated sleep disorder questionnaires (Hamilton anxiety and depression scale,Epworth sleepiness scale and Pittsburgh sleep quality index) were completed by the patients at the same time.Results Ninety-four hemodialysis patients after kidney transplantation failure were enrolled;46 patients (48.94％) met the diagnosis of RLS,the average age was 53.44±l 1.89 years,and the median time of RLS onset after kidney transplantation failure was 46 months.The International RLS Rating scale scores of the patients were 17.26±7.81;76.0％ patients were above moderate.As compared with the non-RLS patients,patients with RLS used more erythropoietin (44/48 vs.46/46),less ferrila (30/48 vs.19/46),and few hypnotic medicine (10/48 vs.3/46),with significant differences (P＜0.05).The serum ion,serum ferritin and serum Vitamin B12 of patients with RLS were significantly lower as compared with non-RLS patients (P＜0.05);and poorer sleep quality and higher depression scale scores in the patients with RLS were noted as compared with those in the non-RLS patients (P＜0.05).Conclusion The prevalence of RLS in hemodialysis patients after kidney transplantation failure is high,low iron protein content,low serum iron content and low vitamin B12 levels may be risk factors for RLS.

Dilated cardiomyopathy(DCM)has a concealed onset with left or even whole heart enlargement as the main imaging manifestation.It is a common primary disease of heart failure and arrhythmia.With the continuous deepening of research in recent years,the intrinsic molecular mechanism of regulatory cell death(RCD)has gradually become clear.Researchers have found that the RCD mode plays a very important role in the occurrence and development of DCM.At present,the RCD modes involved in DCM mainly include apoptosis,necrotic apoptosis,pyroptosis,iron death,autophagy,and cuproptosis,and a certain correlation exists among them,which interact and regulate each other.This article provides an overview of the current research status on the mechanisms of the six RCD modes involved in DCM to provide a reference for future basic research and clinical applications.

Objective:To investigate the gut microbiota composition in subclinical hypothyroidism and euthyroidism patients with Hashimoto′s thyroiditis, and its relationship with clinical indicators and inflammatory factors.Methods:A total of 48 patients diagnosed with Hashimoto′s thyroiditis and 28 healthy controls(HC group) were enrolled from Henan Provincial People′s Hospital from July 2019 to March 2022 in this cross-sectional study. According to thyroid function, 18 patients with Hashimoto′s thyroiditis were divided into subclinical hypothyroidism group(SH group) and 30 patients in euthyroidism function group(Eu group). Fecal microbial composition was detected by 16S rRNA sequencing technology, and peripheral blood was collected to test clinical indicators and inflammatory factors.Results:Compared with HC group, there were significant differences in α and β diversity of gut microbiota in SH and Eu group( P=0.045, P=0.037). At the phylum level, Firmicutes, Bacteroidota, and Proteobacteria were the dominant phylum in the three groups. At the genus level, the abundance of 4 bacterial genera increased gradually in HC group, Eu group, and SH group, including Streptococcus, Comamonas, Elizabethkingia, Achromobacter. However, the abundance of the other 9 genera decreased gradually, such as Subdoligranulum, Coprococcus, Oscillospirales_ UCG-010, Clostridia_ UCG-014, Oscillospiraceae_ UCG-002, Alistipes et al. In addition, the level of serum B-cell activating factor was positively correlated with several bacterial genera such as Achromobacter, Streptococcus, Intestinibacter et al. Conclusion:There are differences in the gut microbiota structure of patients with Hashimoto′s thyroiditis in different thyroid functional states, which is correlated with inflammatory factors.

Objective:To explore the association between serum high density lipoprotein subtype 3 cholesterol (HDL3-C) levels and the severity and in-stent restenosis of patients with coronary artery disease.Methods:124 patients with coronary artery diseases and 62 healthy controls were included in this clinical case-control retrospective study. Participants were hospitalized from November 2020 to November 2021 at Jinling Hospital, Medical School of Nanjing University were enrolled. Patients with coronary artery disease were as follows: 28 patients with acute coronary syndrome and 96 patients with stable coronary heart disease. Serum HDL3-C levels as well as total cholesterol (TC), triglyceride (TG), high-density lipoprotein cholesterol (HDL-C) and low-density lipoprotein cholesterol (LDL-C) levels were determined. According to the coronary artery angiography results of all patients at the time of admission, Gensini scores were calculated and patients were divided into in-stent restenosis group ( n=22), no in-stent stenosis group ( n=23) and non-stent implantation group ( n=79). The correlation between HDL3-C levels and other parameters was analyzed by Pearson or Spearman correlation analyses. Multivariate Logistic regression analyses were used to determine the impact of HDL3-C on the in-stent restenosis of coronary artery diseases. Results:Compared with controls, serum levels of HDL3-C and HDL-C were significantly decreased in patients with coronary artery diseases (all P<0.05). There was a significantly negative correlation between HDL3-C levels and Gensini scores ( r=-0.201, P=0.043). Among patients with coronary artery disease, serum levels of HDL3C, TC and TG in the in-stent restenosis group were significantly lower than in no in-stent stenosis group as well as than in the non-stent implantation group (all P<0.05). Multivariate Logistic regression analyses showed that after adjusting for age, sex, lipid-lowering drugs and TC, TG, LDLC parameters, HDL3-C ( OR=0.885, 95% CI 0.791-0.990, P=0.033) and HDL-C ( OR=0.018, 95% CI 0.001-0.426, P=0.013) levels were both independently associated with the occurrence of coronary artery disease; only HDL3-C levels (no in-stent stenosis group as the reference: OR=0.833, 95% CI 0.698-0.994, P=0.042; non-stent implantation group as the reference: OR=0.812, 95% CI 0.685-0.963, P=0.017) were independently associated with the presence of in-stent restenosis ( P<0.05). Conclusions:Serum HDL3-C levels are decreased in patients with coronary artery disease, especially in patients with in-stent restenosis. HDL3-C levels are associated with the severity of coronary artery lesions and the presence of in-stent restenosis of coronary arteries.