[Objective] To analyze the infection status of hepatitis E virus (HEV) among blood donors in Zhengzhou, so as to provide data support for formulating local blood screening strategies. [Methods] Random samples from blood donors from January to December 2022 were tested for HEV RNA using PCR technology. Reactive samples were sequenced for gene analysis, and the donors were followed up. [Results] Among 21 311 samples, 3(0.14‰) were reactive for HEV RNA, all of whom were male. Genetic sequencing results revealed that one strong positive sample was genotype 4, while sequencing failed for the other two due to low viral load. A follow-up of 25 strong positive donors showed that ALT significantly increased on day 7 after donation, anti-HEV IgM and anti-HEV IgG turned positive. On day 21, ALT returned to normal, and on day 35, HEV RNA turned negative. Notably, anti-HEV IgM and anti-HEV IgG persisted until day 482. [Conclusion] There is HEV infection among blood donors in Zhengzhou, and it is necessary to expand the screening scope to comprehensively explore the prevalence and genotype distribution of HEV among blood donors.

Chronic liver diseases with common causes including viral infections， alcohol abuse， and autoimmune diseases. Alkaloids， as a class of plant-derived compounds， have shown significant potential in regulating chronic liver diseases. Recent studies have shown that alkaloids are able to exert a therapeutic effect on chronic liver diseases through multiple pathways. These compounds have a regulatory effect on key pathological processes such as liver fibrosis， inflammatory response， oxidative stress， and cell apoptosis， and they also regulate the metabolic homeostasis of hepatocytes by modulating multiple signaling pathways， thereby playing a role in regulating chronic liver diseases. This article reviews the role and mechanism of alkaloids in the treatment of chronic liver diseases， in order to provide new ideas and directions for the treatment of chronic liver diseases.

Objective: To understand the epidemiological and etiological characteristics of food poisoning event occurred in a school in Hangzhou, Zhejiang, so as to provide reference for the scientific management of related emergencies. Methods: By determining the nature of the event through epidemiological investigation, a case control study was carried out to spot suspicious food in May 2024. The hygienic investigation was conducted to find out possible pollution links and factors, patients and canteen practitioners anal swab, canteen retention samples, catering link daub and other specimens were collected ,for rapid pathogen screening. And the suspected pathogen Clostridium perfringens (CP) were isolated and identified according to the screening results, and toxin gene detection and whole genome sequencing and cluster analysis of CP isolated strains were carried out. Results: The incident resulted in 45 people experiencing gastrointestinal symptoms, such as diarrhea and abdominal pain. The suspicious food was tomato scrambled eggs and corn ribs provided by the student canteen for lunch on May 29. A hygiene investigation found that there was a risk of contamination in the food processing, preparation and storage. A total of 46 anal swabs and 10 canteen retention samples were positive for CP 16 S, 59 strains of CP were isolated from 27 samples, 10 cases and 1 practitioner isolate were positive for CPE ( cpe ) (F mode), and their whole genome evolution analysis was conducted based on the same source. Conclusions The food poisoning event is caused by CP infection carrying CPE ( cpe ) (F mode), and the possible sources of outbreak are the carriers of the CP by employees. It is recommended that cafeteria staff strengthen training on common foodborne diseases and conduct regular monitoring of pathogens.

Objective To investigate the genetic characteristics of the VP1 region of Coxsackievirus A10 (CVA10) in Yunnan Province. Methods Fecal samples of suspected hand, foot and mouth disease (HFMD) were subjected to real-time fluorescent quantitative PCR for detection of enterovirus CVA10. Positive samples were subjected to VP1 gene sequence amplification and Sanger sequencing. Sequence splicing was performed with DNAstar7.1 Seqman software, and nucleotide sequence and amino acid site analysis were performed using Mega 6.0 software. Results The sequencing of VP1 gene of CVA10 obtained a sequence of 894 nucleotides, encoding 298 amino acids. Compared with the original strain, there were mainly three active amino acid mutation regions, 13-33, 141-142, and 283-285. The nucleotide difference rate between the Yunnan isolates and the reference strain ranged from 16.92% to 30.90%, and the amino acid difference rate ranged from 2.58% to 4.00%. C1 and C2 group nucleotide difference was 10.58%, and the amino acid difference rate was 1.80%. The VP1 150-176 region exhibited highly conserved characteristics. Six CVA10 strains and Sichuan strain MW178898 belonged to the C1 group of the C genotype. The other 14 CVA10 strains belonged to the C2 group. Conclusion VP1 gene mutation is active and CVA10 is an important pathogen of HFMD in Yunnan. C2 genotype of CVA10 is dominant in this study, and C1 and C2 have co-circulated in Yunnan. It is necessary to strengthen monitoring and develop multivalent vaccines containing CVA10 epidemic genotype.

Olfactory disorders are a common symptom in patients with chronic rhinosinusitis, and their diagnosis and treatment have garnered extensive attention from both patients and doctors. Currently, there are various evaluation and treatment methods for olfactory dysfunction; however, choosing a simpler and more accurate assessment, as well as an effective treatment, remains a clinical challenge. In this article, we review the assessment and treatment methods commonly used in clinical practice in recent years to provide better support for the diagnosis and treatment of olfactory disorders.
Humans ; Olfaction Disorders/etiology* ; Sinusitis/complications* ; Chronic Disease ; Rhinitis/complications* ; Rhinosinusitis

Objective To investigate the improvement effect of Necrostatin-1 (Nec-1) on mouse models with immune checkpoint inhibitor (ICI) -associated myocarditis (ICIAM) and potential mechanism. Methods Ten male BALB/c mice aged 6-8 weeks were selected to construct the ICIAM models. The echocardiography and serum myocardial injury markers were used to assess cardiac function of mice. The levels of inflammatory markers including tumor necrosis factor-α (TNF-α) and interleukin-1β (IL-1β) were detected by enzyme-linked immunosorbent assay (ELISA) and quantitative real-time polymerase chain reaction (qRT-PCR), respectively. Hematoxylin-eosin (HE) staining was used to evaluate myocardial inflammation, and Masson staining was used to evaluate myocardial fibrosis. The expressions of myocardial necroptosis proteins including receptor-interacting protein kinase 1 (RIP1), RIP3, mixed lineage kinase domain-like protein (MLKL) and their phosphorylated forms were detected by Western blotting. The spleen lymphocytes were extracted and co-cultured with HL-1 cell line. Cell viability was measured by cell counting kit-8 (CCK-8). The release of reactive oxygen species (ROS) and changes of mitochondrial membrane potential were observed. RIP1, RIP3, MLKL and their phosphorylated forms were determined. The levels of markers of oxidative stress, including malondialdehyde (MDA), superoxide dismutase (SOD) and glutathione peroxidase (GSH-Px), were measured. Results Nec-1 significantly improved the cardiac function injury of mice induced by ICI, and inhibited the release of TNF-α and IL-1β in plasma of ICIAM mice (P＜0.001); inhibited expressions of phosphorylated RIP1, RIP3 and MLKL (P＜0.05); decreased MDA activity, and increased SOD and GSH-Px activity (P＜0.001). In HL-1 cells, Nec-1 intervention inhibited the RIP1-RIP3-MLKL pathway (P＜0.05), improved decrease of the cell viability induced by lymphocytes (P＜0.001), decreased ROS release, increased mitochondrial membrane potential, inhibited MDA activity, and increased SOD and GSH-Px activities (P＜0.001). Conclusions Necroptosis plays an important role in the occurrence and development of ICIAM，but Nec-1 could alleviate the progression of ICIAM by inhibiting necroptosis induced by oxidative stress in cardiomyocytes; RIP1 maybe a new target in treatment of ICIAM.

Objective:To discuss the effect of KIAA1522 on the proliferation,migration,and invasion of lung cancer cells,and to clarify its signaling mechanism.Methods:Bioinformatics analysis was used to detect the expression levels of KIAA1522 mRNA and protein in 75 cases of human non-small cell lung cancer(NSCLC)tissues and adjacent normal lung tissues;immunohistochemical staining was used to detect the expression of KIAA1522 protein in NSCLC tissue and adjacent normal lung tissues;Western blotting method was used to detect the expression level of KIAA1522 protein in various lung cancer cell lines.KIAA1522-small interfering(siRNA)and over-expression plasmids were transfected into the lung cancer H1299 and A549 cells,respectively.The KIAA1522-siRNA experiment was divided into blank group,negative control group(si-NC group),KIAA1522-siRNA#1 group,and KIAA1522-siRNA#2 group.The KIAA1522 over-expression experiment was divided into control group,empty vector control group(OE-NC group,transfected with KIAA1522 over-expression empty vector plasmid),KIAA1522 overexpression group(OE-KIAA1522 group,transfected with KIAA1522 over-expression plasmid),KIAA1522 over-expression+MK2206 group[OE-KIAA1522+MK2206 group,co-transfected with KIAA1522 over-expression plasmid and protein kinase B(AKT)signaling pathway inhibitor MK2206],and MK2206 group(transfected with MK2206).Western blotting method was used to verify the transfection efficiencies of the cells in various groups;MTT assay was used to detect the proliferation activities of the lung cancer cells in various groups;cell scratch assay was used to detect the migration rates of lung cancer cells in various groups;Transwell chamber assay was used to detect the numbers of invasion lung cancer cells in various groups;Western blotting method was used to detect the expression levels of phosphorylated AKT(p-AKT),total AKT(t-AKT),cyclin D1(Cyclin D1),vascular endothelial growth factor(VEGF),and epithelial-mesenchymal transition(EMT)-related proteins[vimentin(Vimentin),N-cadherin(N-cadherin),and E-cadherin(E-cadherin)]proteins in the cells in various groups.Results:The bioinformatics analysis results showed that compared with adjacent normal lung tissue,the expression levels of KIAA1522 mRNA and protein in NSCLC tissue were significantly increased(P<0.05 or P<0.01).The immunohistochemistry staining results showed that compared with adjacent normal lung tissue,the positive expression rate of KIAA1522 protein in NSCLC tissue was significantly increased(P<0.05)and was associated with TNM stage(P<0.01).The Western blotting results showed that compared with normal lung epithelial cells BEAS-2B,the expression levels of KIAA1522 protein in lung cancer cell lines PC9,H1299,H460,A549,H1975,and H226 were significantly increased(P<0.05 or P<0.01).Compared with si-NC group,the expression levels of KIAA1522 protein in the H1299 cells in KIAA1522-siRNA#1 group and KIAA1522-siRNA#2 group were significantly decreased(P<0.01);compared with OE-NC group,the expression level of KIAA1522 protein in the A549 cells in OE-KIAA1522 group was significantly increased(P<0.01).The MTT results showed that at 24,48,and 72 h of cell culture,compared with si-NC group,the proliferation activities of the H1299 cells in KIAA1522-siRNA#1 group and KIAA1522-siRNA#2 group were significantly decreased(P<0.01);compared with OE-NC group,the proliferation activity of the A549 cells in OE-KIAA1522 group was significantly increased(P<0.05);compared with OE-KIAA1522 group,the proliferation activity of the A549 cells in OE-KIAA1522+MK2206 group was significantly decreased(P<0.01);compared with OE-KIAA1522+MK2206 group,the proliferation activity of the A549 cells in MK2206 group was significantly decreased(P<0.05).The cell scratch assay results showed that compared with si-NC group,the migration rates of the H1299 cells in KIAA1522-siRNA#1 group and KIAA1522-siRNA#2 group were significantly decreased(P<0.01);compared with OE-NC group,the migration rate of the A549 cells in OE-KIAA1522 group was significantly increased(P<0.01);compared with OE-KIAA1522 group,the migration rate of the A549 cells in OE-KIAA1522+MK2206 group was significantly decreased(P<0.05);compared with OE-KIAA1522+MK2206 group,the migration rate of the A549 cells in MK2206 group was significantly decreased(P<0.05).The Transwell chamber assay results showed that compared with si-NC group,the numbers of invasion H1299 cells in KIAA1522-siRNA#1 group and KIAA1522-siRNA#2 group were significantly decreased(P<0.01);compared with OE-NC group,the number of invasion A549 cells in OE-KIAA1522 group was significantly increased(P<0.01);compared with OE-KIAA1522 group,the number of invasion A549 cells in OE-KIAA1522+MK2206 group was significantly decreased(P<0.01);compared with OE-KIAA1522+MK2206 group,the number of invasion A549 cells in MK2206 group was significantly decreased(P<0.01).The Western blotting results showed that compared with si-NC group,the expression levels of p-AKT,Cyclin D1,Vimentin,N-cadherin,and VEGF proteins in the H1299 cells in KIAA1522-siRNA#1 group and KIAA1522-siRNA#2 group were significantly decreased(P<0.05 or P<0.01),while the expression level of E-cadherin protein was significantly increased(P<0.01);compared with OE-NC group,the expression levels of p-AKT,Cyclin D1,Vimentin,N-cadherin,and VEGF proteins in the A549 cells in OE-KIAA1522 group were significantly increased(P<0.05 or P<0.01),while the expression level of E-cadherin protein was significantly decreased(P<0.05);compared with OE-KIAA1522 group,the expression levels of p-AKT,Cyclin D1,Vimentin,N-cadherin,and VEGF proteins in the A549 cells in OE-KIAA1522+MK2206 group were significantly decreased(P<0.05 or P<0.01),while the expression level of E-cadherin protein was significantly increased(P<0.05);compared with OE-KIAA1522+MK2206 group,the expression levels of Cyclin D1,Vimentin,N-cadherin,and VEGF proteins in the A549 cells in MK2206 group were significantly decreased(P<0.05 or P<0.01),while the expression level of E-cadherin protein was significantly increased(P<0.05).Conclusion:The KIAA1522 protein upregulates the expression of Cyclin D1,EMT-related proteins,and VEGF protein in lung cancer cells,promoting the proliferation,migration,and invasion of lung cancer cells,and its mechanism is related to the activation of the AKT signaling pathway.

OBJECTIVE To investigate the relationship between clinical features and human papillomavirus(HPV)infection and the expression of hypoxia-inducible factor(HIF)and vascular endothelial growth factor(VEGF)in patients with pharyngeal and laryngeal papilloma.METHODS Adult patients with pharyngeal and laryngeal papilloma admitted to Beijing Tongren Hospital Affiliated to Capital Medical University from October 2022 to February 2024 were selected as the test group,and adult patients with non-inflammatory non-tumor throat lesions were selected as the control group.Clinical data and pathological tissue samples were collected.The differences of pharyngeal and laryngeal papilloma patients in symptoms,age,gender,smoking,drinking,the number of lesion involved sites and the number of operations were compared.Real-time fluorescence quantitative PCR was used to detect the expression of HPV DNA,HIF cDNA and VEGF cDNA in the pathological tissues.RESULTS The symptoms of pharyngeal papilloma are less severe than those of laryngeal papilloma.There were no statistically significant differences between the two groups in terms of gender and alcohol consumption(P>0.05),but there were statistically significant differences in terms of age,smoking,the number of lesions involved and the number of operations(P<0.05).The number of lesion involved sites was positively correlated with the expression of HIF and VEGF(r=0.3553、r=0.2693,P<0.05).The number of operations was positively correlated with the expression of VEGF(r=0.2515,P<0.05).The expression levels of HIF and VEGF in laryngeal papilloma were higher than those in pharyngeal papilloma and control group(F=9.174,H=23.737,P<0.001).The expression levels of HIF and VEGF in HPV-positive tissue were higher than those in HPV-negative tissue(t=3.899,t=6.463,P<0.001).The HPV positive rate of laryngeal papilloma(97.9%,46/47)was higher than that in pharyngeal papilloma(21.7%,10/46)and control group(13.6%,3/22)(χ2=53.114、χ2=46.647,P<0.001).CONCLUSION HPV infection is one of the important causes of pharyngeal papilloma.The low infection status of pharyngeal papilloma may lead to low expression of HIF and VEGF in the tumor,which makes its clinical features different from laryngeal papilloma.

OBJECTIVE To investigate the improved anesthesia method of arytenoid cartilage reduction under general anesthesia in the treatment of arytenoid dislocation.METHODS The clinical data of 12 patients who underwent modified arytenoid cartilage reduction under general anesthesia in Beijing Tongren Hospital from July 2020 to March 2024 were retrospectively analyzed.To evaluate and analyze the modified anesthesia method of maintaining low degree of neuromuscular block during operation,the recovery of arytenoid cartilage movement and sound after operation.RESULTS All the 12 patients successfully completed arytenoid cartilage reduction.The articulation,arytenoid movement and glottis closure were improved significantly.Compared with the total voice handicap index(VHI),physical scores,functional scores and emotional scores before reduction,the scores at 1 month after surgery were significantly lower[83.5(75-91)vs.13(7-19),30.5(26.5-33)vs.5.5(3-7),25.5(22.5-29)vs.4(2-6),26(23.5-30)vs.4(1.5-6),P<0.001].No complications such as laryngeal spasm and laryngeal edema occurred during perioperative period.CONCLUSION Arytenoid cartilage reduction under modified general anesthesia has high safety,good patient cooperation and high reduction success rate.It provides a new option for the treatment of arytenoid dislocation.