Objective:To examine whether immunohistochemistry of methylthioadenosine phosphorylase (MTAP) and p16 could be used to predict the CDKN2A status in various brain tumors.Methods:A total of 118 cases of IDH-mutant astrocytomas, 16 IDH-wildtype glioblastoma, 17 polymorphic xanthoastrocytoma (PXA) and 20 meningiomas diagnosed at Xuanwu Hospital, Capital Medical University, Beijing, China from November 2017 to October 2023 were collected and analyzed. The CDKN2A status was detected by using fluorescence in situ hybridization or next-generation sequencing. Expression of MTAP and p16 proteins was detected with immunohistochemistry. The association of loss of MTAP/p16 expression with CDKN2A homozygous/heterozygous deletion was examined.Results:Among the 118 cases of IDH-mutant astrocytoma, 13 cases showed homozygous deletion of CDKN2A. All of them had no expression of MTAP while 9 cases had no expression of p16. Among the 16 cases of IDH wild-type glioblastoma, 6 cases showed homozygous deletion of CDKN2A. All 6 cases had no expression of MTAP, while 3 of these cases had no expression of p16 expression. Among the 17 PXA cases, 4 cases showed homozygous deletion of CDKN2A, and the expression of MTAP and p16 was also absent in these 4 cases. Among the 20 cases of meningiomas, 4 cases showed homozygous deletion of CDKN2A. Their expression of MTAP and p16 was also absent. Among the four types of brain tumors, MTAP was significantly correlated with CDKN2A homozygous deletion ( P<0.05), with a sensitivity of 100%. However, it was only significantly correlated with the loss of heterozygosity (LOH) of CDKN2A in astrocytomas ( P<0.001). P16 was associated with CDKN2A homozygous deletion in IDH-mutant astrocytoma and PXA ( P<0.001), but not with the LOH of CDKN2A. Its sensitivity and specificity were lower than that of MTAP. Conclusions:MTAP could serve as a predictive surrogate for CDKN2A homozygous deletion in adult IDH-mutant astrocytoma, PXA, adult IDH-wildtype glioblastoma and meningioma. However, p16 could only be used in the first two tumor types, and its specificity and sensitivity are lower than that of MTAP.

Background Polycyclic aromatic hydrocarbons (PAHs), one of the main components of fine particulate matter (PM_2.5), have a certain impact on ambient air quality, and long-term exposure to PAHs may pose potential health risks to human beings. Objective To identify the distribution characteristics and sources of PAHs in atmospheric PM_2.5 in a district of Taizhou City from 2019 to 2021, and to evaluate the health risks of PAHs to the population in the area through the inhalation pathway. Methods From 2019 to 2021, air PM_2.5 sampling was carried out at a state-controlled surveillance point in a district of Taizhou City for 7 consecutive days on the 10th-16th of each month, the sampling time was 24 h·d⁻¹, and the sampling flow rate was 100 L·min⁻¹. PM_2.5 mass concentration was calculated by gravimetric method. A total of 16 PAHs were determined by ultrasonic extraction-liquid chromatography. Kruskal-Wallis H test was used to compare the distribution charac teristics of PAHs concentrations by years and seasons, characteristic ratio and principal component analysis (PCA) was used to analyze their sources, and a lifetime carcinogenic risk (ILCR) model was used to assess the health risk of PAHs. Results From 2019 to 2021, the annual average concentrations [M (P₂₅, P₇₅)] of ∑PAHs in atmospheric PM_2.5 in the selected district of Taizhou City were 6.52 (2.46, 10.59), 8.52 (4.56, 12.29), and 3.72 (1.51, 7.11) ng·m⁻³, respectively, and the annual benzo[a]pyrene (BaP) excess rates (national limit: 1 ng·m⁻³) were 27.38% (23/84), 47.62% (40/84), and 19.04% (16/84), respectively, both presenting 2020> 2019 > 2021 (P<0.001, P<0.05). The ∑PAHs concentration distribution showed a seasonal variation, with the highest value in winter and the lowest value in summer (P<0.05). Among the atmospheric PM_2.5 samples, the proportion of 5-ring PAHs was the highest, the proportion of 2-3-ring PAHs was the lowest; the proportion of 2-4-ring PAHs showed a yearly upward trend, and the proportion of 5-6-ring PAHs showed yearly downward trend (P<0.05). The characteristic ratio and PCA results suggested that the sources of sampled PAHs were mainly mixed sources such as dust, fossil fuel (natural gas), coal combustion, industrial emissions, and motor vehicle exhaust emissions. The ILCR (R_ILCR) of PAHs by inhalation for men, women, and children were 1.83×10⁻⁶, 2.35×10⁻⁶, and 2.04×10⁻⁶, respectively, and the annual average R_ILCR was 2.07×10⁻⁶, all greater than 1×10⁻⁶. Conclusion For the sampled time period, the main sources of PAHs pollution in atmospheric PM_2.5 in the target district of Taizhou City are dust, fossil fuel (natural gas), coal combustion, industrial emissions, motor vehicle emissions, etc., and PAHs may have a potential carcinogenic risk to local residents.

Objective To explore the possible mechanism of emodin in inhibiting proliferation,migration,and invasion of AGS cells and in suppressing the expressions of YAP1 and FOXD1.Methods Normal gastric cell GES-1 and gastric cancer cell AGS were cultured with different concentrations of emodin.CCK8 test,scratch test and Transwell assay were used to verify changes in the biological phenotype of AGS cells.TCGA database was applied to analyze expressions of HK2,YAP1 and FOXD1 in gastric cancer tissues and normal gastric tissues.Western blotting method was used to detect the impacts of emodin on HK2,YAP1 and FOXD1 proteins in AGS cells.Exogenous pyruvic acid was added to verify the changes in YAP1 and FOXD1.Results The IC50 of emodin was significantly higher in GES-1 cells than in AGS cells(P<0.05).CCK8 proliferation test,scratch test,and Transwell assay showed that emodin significantly inhibited the biological abilities of AGS(P<0.05 for comparisons).Analysis on the TCGA bioinformatics database found that the expression of key enzymes HK2 in the glycolysis pathway and oncogenes YAP1 and FOXD1 was significantly higher in gastric cancer tissues than in normal gastric tissues(P<0.05 for comparisons).Emodin significantly inhibited the protein expressions of key glycolytic enzymes HK2 and oncogenes YAP1 and FOXD1(P<0.05 for comparisons).With supplement of exogenous glycolytic metabolite pyruvate,the protein expressions of oncogenes YAP1 and FOXD1 significantly increased(P<0.05 for comparisons).Conclusions Emodin has a significant pharmacological inhibitory effect on gastric cancer AGS cells,markedly suppressing their biological phenotype.Emodin not only significantly inhibits the key enzyme HK2 in glycolysis metabolism,but also the protein expressions of oncogenes YAP1 and FOXD1.With the addition of exogenous pyruvate to enhance the glycolytic metabolic pathway,the protein expressions of oncogenes YAP1 and FOXD1 significantly increased.The above results suggest a close association of YAP1 and FOXD1 with glycolytic metabolism.Emodin may inhibit oncogenes YAP1 and FOXD1 through the glycolytic metabolism of gastric cancer AGS cells.

Diabetic peripheral neuropathy is a common diabetic complication.Presently,our understanding of its pathogenesis is incomplete,and there are no effective treatment options.In-depth research requires the use of animal experiments.The criteria for modeling success and the evaluation method for peripheral nerve function recovery are critical for carrying out animal experiments into type 2 diabetic peripheral neuropathy.However,but there has been a lack of systematic interrogation and analysis of the evaluation method used with type 2 diabetic peripheral neuropathy models.Therefore,the author reviewed the recent data,summarized and analyzed the evaluation method used for animal models of type 2 diabetic peripheral neuropathy of small and large nerve fibers,and proposed future directions for development,providing a reference for related research.

Objective:To explore whether the food additive sodium benzoate(NAB) induces pancreatic inflammation and β cell apoptosis through the benzoylation(Kbz) modification pathway.Methods:In vivo experiments: C57BL/6J male mice(8 weeks old, 18-20 g) were randomly divided into normal control group(double distilled water feeding) and NAB feeding group(1 g/kg NAB feeding). Blood glucose were measured. After 20 weeks, fasting serum insulin, interleukin(IL)-18, IL-1β, and benzoyl-CoA levels were detected by ELISA method. Bax, IL-18, Pan-Kbz and Pan-Kac were detected by immunohistochemistry staining. In vitro experiments: β-TC-6 cells were cultured with NAB(6 mmol/L) or benzoyl-CoA(100 μmol/L) as stimulator and acyltransferase P300 inhibitor A485(10 μmol/L) as intervention factor. 24 hours later, inflammation, apoptosis, insulin secretion and Pan-Kbz level were detected by qRT-PCR, ELISA and Western blotting.Results:In the in vivo experiments, compared to the NC group, mice in the NAB group exhibited impaired glucose tolerance, decreased fasting insulin levels, significantly increased serum benzoyl coenzyme A concentrations, relatively elevated pancreatic IL-1β, IL-18, and Bax protein expressions, increased levels of Pan-Kbz, while Pan-Kac levels were downregulated(all P<0.05); In vitro experiments, NAB dose-dependently inhibited insulin secretion, promoted the release of Pan-Kbz and inflammatory factors IL-18 and TNF- α, inhibited Bcl-2 expression and up-regulated Bax expression, A485 reversed NAB-induced Pan-Kbz modification, improved NAB-induced inflammation and apoptosis, and promoted insulin secretion(all P<0.05). Conclusion:NAB may induce pancreatic inflammation, β-cell apoptosis, and impair insulin secretion through Kbz modification pathway.

Objective To investigate the effect and mechanism of sodium ferulate in the treatment of Ménière disease(MD)model mice.Methods BALB/c mice were selected,and an MD model was constructed using posterior fossa epidural approach combined with intraperitoneal injection of aldosterone.Sixty model mice were randomly grouped into the model group,the low dose sodium ferulate group,the medium dose sodium ferulate group,the high dose sodium ferulate group and the dexamethasone group,with 12 mice in each group.Another 12 BALB/c mice were selected as the sham operation group.After grouping and tympanic administration,auditory evoked brainstem response(ABR)was applied to detect the hearing level of mice in each group.HE staining and magnetic resonance imaging(MRI)were applied to observe the morphology of cochlea and membranous labyrinth hydrops of mice in each group.Enzyme-linked immunosorbent assay was applied to detect serum levels of lipoprotein a[Lp(a)],pro-inflammatory factor interleukin-6(IL-6)and tumor necrosis factor-α(TNF-α)in each group.Immunohistochemical staining and Western blot assay were applied to detect the expression of Lp(a)in each group.Results Compared with the sham operation group,the ABR threshold,the score of membranous labyrinth hydrops,the proportion of middle stage area,serum levels of Lp(a),IL-6 and TNF-α,the IOD value of Lp(a)positive expression and the expression of Lp(a)protein in the cochlea of mice were significantly increased in the model group(P＜0.05).Compared with the model group,the ABR threshold,the score of membranous labyrinth hydrops,the proportion of middle stage area,levels of serum Lp(a),IL-6 and TNF-α,the IOD value of Lp(a)positive expression and the expression of Lp(a)protein in the cochlea of mice were significantly decreased in the low,medium and high dose sodium ferulate groups and the dexamethasone group(P＜0.05),and the effect of high dose sodium ferulate was more obvious.Conclusion Sodium ferulate can down regulate the expression of Lp(a)protein,reduce the production of proinflammatory factors,inhibit the inflammatory reaction,thereby alleviating the symptoms of membranous labyrinth hydrops in MD mice,and improving their auditory function.

Objective:To construct and apply the quality sensitive indicator system for eye, ear, nose and throat specialized nursing in Operating Rooms, in order to provide a basis for evaluating the quality of nursing work in specialized Operating Rooms.Methods:Using the three-dimensional quality evaluation model of "structure-process-result", a preliminary framework for quality sensitive indicators of eye, ear, nose, and throat specialty nursing in the Operating Room was developed using literature search and expert interviews. The final indicator system and weight were determined through two rounds of Delphi expert inquiry. In January 2023, targeted training was conducted in the Operating Room of Eye & ENT Hospital of Fudan University based on the established quality indicator system. The difference of outcome indicators in the sensitive index system of nursing quality in Operating Room of our hospital in December 2022 (before training) and February 2023 (after training) were compared.Results:The final version of the quality sensitive indicator system for eye, ear, nose and throat specialty nursing in the Operating Room included three primary indicators, 10 secondary indicators and 36 tertiary indicators. The positive coefficients of the two rounds of consultation with experts were both 100.00%, and the authoritative coefficients were 0.917 and 0.931. After applying the quality indicator system, the failure rate of emergency drills related to difficult airways among nursing staff in the Operating Room of the Eye, Ear, Nose and Throat Department decreased from 4.86% to 0.54% ( P<0.05). The failure rate of specialized theoretical and operational skills assessment decreased from 6.49% to 1.08% ( P<0.01). The number of unqualified nursing quality cases in the two groups decreased to different degrees ( P< 0.05). Among the occurrence of adverse events in the two groups, the incidence of intraoperative counting accidents decreased from 1.85% to 0 ( P<0.05), and the incidence of iatrogenic head and face stress injuries of surgical patients decreased from 2.47% to 0.31% ( P<0.05) . Conclusions:The sensitive indicator system for the quality of eye, ear, nose and throat specialized nursing in the Operating Room constructed in this study is scientifically sound and applicable, which can effectively reduce nursing risks in specialized Operating Rooms and improve the quality of nursing work in specialized Operating Rooms.

Objective:To investigate the status and influencing factors of different types of cognitive frailty in aged inpatients with hypertension.Methods:Totally 300 aged patients with hypertension admitted to the Cardiology, Geriatrics, and Endocrinology Departments of Xuanwu Hospital, Capital Medical University, from April to October 2022 were selected by convenience sampling. Data were collected using a general information questionnaire, the Fried Frailty Phenotype (FP), the Mini-Mental State Examination (MMSE), the 9-item Subjective Cognitive Decline Questionnaire-9 (SCD-Q9), the Morisky Medication Adherence Scale (MMAS), the Pittsburgh Sleep Quality Index (PSQI), the Hospital Anxiety and Depression Scale (HADS), the Social Support Rating Scale (SSRS), and the Mini Nutritional Assessment (MNA) .Results:A total of 300 questionnaires were distributed and returned, yielding a 100.00% response rate. Among the 300 aged hypertensive patients, 74 were diagnosed with reversible cognitive frailty (RCF) and 98 with potentially reversible cognitive frailty (PRCF). Logistic vegression analysis showed that, factors influencing RCF included daily exercise habits and the use of thiazide diuretics ( P<0.05) ; factors influencing PRCF included age, pre-retirement occupation, daily exercise habits, sleep quality, Barthel Index score, and serum albumin levels ( P<0.05) . Conclusions:The status of both RCF and PRCF is relatively high among aged inpatients with hypertension. The influencing factors for different types of cognitive frailty vary. Targeted interventions based on both common and specific influencing factors should be developed to reverse or slow the progression of cognitive frailty in aged hypertensive patients.

Objective:To retrospectively analyze the treatment status of tyrosine kinase inhibitors (TKI) in newly diagnosed patients with chronic myeloid leukemia (CML) in China.Methods:Data of chronic phase (CP) and accelerated phase (AP) CML patients diagnosed from January 2006 to December 2022 from 77 centers, ≥18 years old, and receiving initial imatinib, nilotinib, dasatinib or flumatinib-therapy within 6 months after diagnosis in China with complete data were retrospectively interrogated. The choice of initial TKI, current TKI medications, treatment switch and reasons, treatment responses and outcomes as well as the variables associated with them were analyzed.Results:6 893 patients in CP ( n=6 453, 93.6%) or AP ( n=440, 6.4%) receiving initial imatinib ( n=4 906, 71.2%), nilotinib ( n=1 157, 16.8%), dasatinib ( n=298, 4.3%) or flumatinib ( n=532, 7.2%) -therapy. With the median follow-up of 43 ( IQR 22-75) months, 1 581 (22.9%) patients switched TKI due to resistance ( n=1 055, 15.3%), intolerance ( n=248, 3.6%), pursuit of better efficacy ( n=168, 2.4%), economic or other reasons ( n=110, 1.6%). The frequency of switching TKI in AP patients was significantly-higher than that in CP patients (44.1% vs 21.5%, P<0.001), and more AP patients switched TKI due to resistance than CP patients (75.3% vs 66.1%, P=0.011). Multi-variable analyses showed that male, lower HGB concentration and ELTS intermediate/high-risk cohort were associated with lower cytogenetic and molecular responses rate and poor outcomes in CP patients; higher WBC count and initial the second-generation TKI treatment, the higher response rates; Ph + ACA at diagnosis, poor PFS. However, Sokal intermediate/high-risk cohort was only significantly-associated with lower CCyR and MMR rates and the poor PFS. Lower HGB concentration and larger spleen size were significantly-associated with the lower cytogenetic and molecular response rates in AP patients; initial the second-generation TKI treatment, the higher treatment response rates; lower PLT count, higher blasts and Ph + ACA, poorer TFS; Ph + ACA, poorer OS. Conclusion:At present, the vast majority of newly-diagnosed CML-CP or AP patients could benefit from TKI treatment in the long term with the good treatment responses and survival outcomes.

Objective To compare the surgical results of cholesteatoma of external auditory canal under the otoscope and the microscope.Methods Clinical data of 44 patients with cholesteatoma from January 2015 to December 2019 were analyzed retrospectively.According to the operation mode,the patients were divided into observation group and control group.The cholesteatoma in the observation group was cleaned under the otoscope,and the cholesteatoma in the control group was cleaned under the microscope.The clinical effects of the two groups were compared.Results The patients in both groups were cured and their hearing was improved in different degrees.Compared with the control group,the difference of speech frequency hearing threshold between the observation group and the control group was statistically significant(t = 19.71,t = 13.41,P＜0.05).The operation time of the observation group was short than that of the control group,and the local discomfort of the observation group was lighter than that of the control group after operation,which was statistically significant(t =-3.68,t =-2.44,P＜0.05).All the patients were followed up for 6 months with dry ears and no recurrence.Conclusion Endoscopic treatment of cholesteatoma of external auditory canal is simple and effective,which is worthy of clinical application.