Objective To investigate the genetic characteristics and recombination of human-infected sapoviruses(SaVs)worldwide using bioinformatics.Methods The complete genome sequences of SaVs were downloaded from the National Center for Biotechnology Information(NCBI)while high-quality complete genomes were retained for analysis.Molecular phylogenetic trees of SaVs were constructed to analyze their genetic characteristics,followed by recombination analysis of human-infected SaV strains genetype Ⅰ,Ⅱ,Ⅳ,and V(G Ⅰ,G Ⅱ,GⅣ,and GⅤ)with recombination analysis software.Results SaVs exhibited substantial genetic diversity worldwide and infected a wide range of hosts.Human-associated SaVs included G Ⅰ,G Ⅱ,GⅣ,and GⅤ,with GⅤ shared between human and swine hosts.Genetype recombination analysis of SaVs revealed a high frequency of recombination in SaV G Ⅱ strains that involved diverse hosts in the field of SaV G V strains.Recombination breakpoints of the virus were concentrated in the major viral proteins 1(VP1)and minor viral proteins 2(VP2).Conclusion Based on systematic analysis of the genetic characteristics of human-infected SaVs,the genotype distribution and prevalence of SaVs are investigated,the recombination patterns of SaV revealed,and its genetic dynamics highlighted.These findings can offer insights into epidemiological trends of viruses and help devise effective prevention and control strategies.

Objective To comprehensively analyze the epidemiological characteristics and resistance mechanisms of New Delhi metallo-β-lactamase(NDM)-positive multidrug-resistant bacteria in China.Methods Relevant literatures on NDM-positive multidrug-resistant bacteria discovered in China were searched in the CNKI and PubMed databases(publications from January 1,2017 to December 31,2023).The epidemiological analysis was conducted on the types of NDM-positive bacterial strains,their regional distribution,infection sources,resistance profiles,and transfer mechanisms.Results A total of 118 eligible articles were collected,reporting 1627 NDM-positive bacterial strains.The number of reports increased annually from 2011 to 2019,but began to decline annually from 2020 onwards.NDM-1 and NDM-5 were the most commonly reported variants.The highest number of reports came from Eastern China,followed by Central China and North China.The primary pathogens were Klebsiella pneumoniae,Escherichia coli,and Enterobacter cloacae.The age distribution of patients with NDM-positive infections showed distinct patterns,with neonates and children accounting for 27.25％and patients over 50 years old accounting for 49.57％.The majority of positive bacterial infections came from sputum(38.28％),urine(28.94％),and blood(23.28％).The main departments reporting NDM-positive bacteria were the ICU(39.93％)and pediatrics(20.14％).These resistant bacteria exhibited resistance to more than 50.00％of antibiotics,with lower resistance to colistin and tigecycline(below 30.00％).The predominant plasmid type carrying the blaNDMwas IncX3,and the insertion sequences upstream and downstream of the blaNDM showed diversity.Conclusion NDM-positive multidrug-resistant bacteria are widely prevalent across regions in China,exhibiting multidrug-resistance.This poses significant challenges to clinical antibiotic selection and necessitates the development of effective countermeasures.

Objective To evaluate the role of spinal nuclear factor erythroid 2-related factor 2 (Nrf2)/heme oxygenase-1 (HO-1) signaling pathway in hydrogen-induced reduction of inflammatory pain in rats.Methods Sixty-four SPF healthy adult male Sprague-Dawley rats,weighing 200-250 g,were divided into 4 groups (n =16 each) using a random number table:control group (group C),inflammatory pain group (group IP),inflammatory pain plus hydrogen-rich saline group (group IP+H2) and inflammatory pain plus hydrogen-rich saline plus Nrf2 inhibitor all-trans retinoic acid (ATRA) group (group IP+H2+ATRA).Chronic inflammatory pain was induced by injecting complete Freund's adjuvant (CFA) 100 μl into the plantar surface of the left hind paw in IP group and IP+H2 group.The equal volume of normal saline was given instead in group C.Hydrogen-rich saline 5 ml/kg was injected intraperitoneally once a day for 7consecutive days starting from 1 day after injecting CFA in group IP+H2 and group IP+H2+ATRA,and the equal volume of normal saline was given instead in the other groups.ATRA 7 mg/kg was injected intraperitoneally once a day for 2 consecutive days starting from 2 days before injecting CFA.The mechanical paw withdrawal threshold (MWT) and thermal paw withdrawal latency (TWL) were measured at 1 day before establishing the model (T0) and 1,3 and 7 days after establishing the model (T1-3).Six rats were sacrificed after the last measurement of pain threshold on day 7 after establishing the model,and the L4-6 lumbar segments of the spinal cord were removed for determination of the expression of Nrf2,HO-1 and glial fibrillary acidic protein (GFAP) by Western blot.Results Compared with group C,the MWT was significantly decreased and the TWL was shortened at T1-3,and the expression of Nrf2,HO-1 and GFAP was up-regulated in IP and IP+H2 groups (P＜0.05).Compared with group IP,the MWT was significantly increased and the TWL was prolonged at T1-3,the expression of Nrf2 and HO-1 was up-regulated,and the expression of GFAP was down-regulated in group IP+H2 (P＜0.05),and no significant change was found in the parameters mentioned above in group IP+H2+ATRA (P＞0.05).Compared with group IP+H2,the MWT was significantly decreased and the TWL was shortened at T1-3,the expression of Nrf2 and HO-1 was down-regulated,and the expression of GFAP was up-regulated in group IP+H2+ATRA (P＜0.05).Conclusion Activation of spinal Nrf2/HO-1 signaling pathway is involved in hydrogen-induced reduction of infflammatory pain in rats.

Objective To study the interactions between the highly pathogenic avian influenza H5N1 nucleoprotein (H5N1 NP) and NF-κB-inducing kinase (NIK),and to reveal the effect of H5N1 NP on NIK-induced NF-κB transcriptional activity.Methods The gene encoding NIK protein was amplified by RT-PCR from total RNA of HeLa cell line.Eukaryotic expression plasmid pCMV-Myc-NIK and prokaryotic expression plasmid pGEX-4T-1-NP (GST-NP) were constructed by cloning from HeLa cell cDNA and pcDNA3-Flag-NP vector,respectively.Co-immunoprecipitation (co-IP) and GST pull-down were used to test the interactions between H5N1 NP and NIK.Dual-luciferase reporter gene analysis system was used to test the effect of H5N1 NP on NIK-induced NF-κB transcriptional activity.Results Co-IP and GST pull-down showed that pCMV-Myc-NIK and pGEX-4T-1-NP (GST-NP) could express Myc tagged NIK protein and GST tagged NP protein in HEK293T cells and E.coli,respectively,and that H5N1 NP was associated with NIK in vivo and in vitro.Dual-luciferase reporter gene analysis suggested that H5N1 could inhibit NIK-induced NF-κB transcriptional activity.Conclusion H5N1 NP interacts with NIK and inhibits NIK-induced NF-κB transcriptional activity.This finding can facilitate further study of H5N1.

OBJECTIVETo study the relationship between fibrotic focus (FF) and carbonic anhydrase (CA) IX in invasive ductal carcinomas (IDC) of the breast.

METHODSIn 167 cases of IDC, the FF was assessed morphologically, and expression of ER, PR and CA IX was evaluated using MaxVision immunohistochemistry.

RESULTSThe expression of CA IX in IDC with and without FF was 56.3% (45/80) and 28.7% (25/87) respectively, with significant difference (P=0.001). In IDC with FF, the CA IX expression of tumor cells in tumors with CA IX-positive fibroblasts (35/40, 87.5%) was significantly (P<0.001) higher than that in tumors with CA IX-negative fibroblasts (10/40, 25.0%). In IDC with FF, the CA IX expression of fibroblasts of FF in grade 3 IDC (23/33, 69.7%) was significantly (P=0.006) higher than that in grade 1+2 tumors (17/47, 36.2%). The ER and PR expression of tumor cells in tumors containing CA IX-negative fibroblasts was 72.5% (29/40) and 65.0% (26/40) respectively, whereas the ER and PR expression of tumor cells in tumors containing CA IX-positive fibroblasts was 50.0% (20/40) and 42.5% (17/40) respectively; the difference was statistically significant (for both ER and PR, P=0.04). The age of patients with tumors containing CA IX-negative fibroblasts was significantly (P=0.002) older than those containing CA IX-positive fibroblasts. The FF diameter/tumor diameter in tumors containing CA IX-positive fibroblasts was significantly larger than those containing CA IX-negative fibroblasts. (3) For the groups of tumor size≤2 cm and tumor size between 2 cm to 5 cm, the diameter of the fibrotic focus was significantly (P<0.01) smaller than the fibrotic focus size of tumors>5 cm in size.

CONCLUSIONSCA IX expression is correlated with FF, and that in fibroblasts of FF correlated with patients' age, tumor grade, hormone receptors and FF diameter/tumor diameter. CA IX expression in FF might be a marker for poor prognosis in patients with breast cancer.

Age Factors ; Antigens, Neoplasm ; Breast Neoplasms ; metabolism ; pathology ; Carbonic Anhydrase IX ; Carbonic Anhydrases ; Carcinoma, Ductal, Breast ; enzymology ; pathology ; Female ; Fibroblasts ; metabolism ; Humans ; Immunohistochemistry ; Neoplasm Grading ; Neoplasm Proteins ; Receptors, Estrogen ; metabolism ; Receptors, Progesterone ; metabolism

Objective To study the relationship between fibrotic focus ( FF ) and carbonic anhydrase ( CA) Ⅸin invasive ductal carcinomas ( IDC) of the breast.Methods In 167 cases of IDC, the FF was assessed morphologically, and expression of ER, PR and CA Ⅸ was evaluated using MaxVision immunohistochemistry.Results The expression of CAⅨin IDC with and without FF was 56.3%(45/80) and 28.7%(25/87) respectively, with significant difference (P=0.001).In IDC with FF, the CA Ⅸexpression of tumor cells in tumors with CAⅨ-positive fibroblasts (35/40, 87.5%) was significantly (P<0.001) higher than that in tumors with CAⅨ-negative fibroblasts (10/40, 25.0%).In IDC with FF, the CAⅨexpression of fibroblasts of FF in grade 3 IDC ( 23/33, 69.7%) was significantly ( P =0.006 ) higher than that in grade 1 +2 tumors (17/47, 36.2%).The ER and PR expression of tumor cells in tumors containing CA Ⅸ-negative fibroblasts was 72.5% ( 29/40 ) and 65.0% ( 26/40 ) respectively, whereas the ER and PR expression of tumor cells in tumors containing CAⅨ-positive fibroblasts was 50.0%(20/40) and 42.5% (17/40) respectively; the difference was statistically significant (for both ER and PR, P=0.04 ) .The age of patients with tumors containing CA Ⅸ-negative fibroblasts was significantly ( P=0.002) older than those containing CA Ⅸ-positive fibroblasts.The FF diameter/tumor diameter in tumors containing CA Ⅸ-positive fibroblasts was significantly larger than those containing CA Ⅸ-negative fibroblasts.(3) For the groups of tumor size≤2 cm and tumor size between 2 cm to 5 cm, the diameter of the fibrotic focus was significantly (P<0.01) smaller than the fibrotic focus size of tumors >5 cm in size. Conclusions CA IX expression is correlated with FF, and that in fibroblasts of FF correlated with patients′age, tumor grade, hormone receptors and FF diameter/tumor diameter.CAⅨexpression in FF might be a marker for poor prognosis in patients with breast cancer.

Adenocarcinoma, Clear Cell ; metabolism ; pathology ; surgery ; Alkaline Phosphatase ; metabolism ; Carcinoma, Endometrioid ; metabolism ; pathology ; Diagnosis, Differential ; Endodermal Sinus Tumor ; metabolism ; pathology ; surgery ; Female ; GPI-Linked Proteins ; metabolism ; Glypicans ; metabolism ; Humans ; Isoenzymes ; metabolism ; Keratin-7 ; metabolism ; Liver Neoplasms ; metabolism ; pathology ; secondary ; Middle Aged ; Mucin-1 ; metabolism ; Ovarian Neoplasms ; metabolism ; pathology ; surgery ; alpha-Fetoproteins ; metabolism

Objective To survey the prevalence of greenhouse farmer's lung and related risk factors in part of rural areas of Liaoning Province.Methods Using uniform scheme,procedures and questionnaire,a survey for 5420 farmers(2660 men and 2760 women)with complete data who work inside greenhouses was performed in Shenyang,Xinmin,Chaoyang,and Jinzhou between August 2006 and June 2009.Pulmonary function tests was performed for every active farmer.Results Greenhouse farmer's lung was diagnosed in 308 cases,205 men(66.55%,205/308)and 103 women(33.44%,103/308),a prevalence of 5.7%(308/5420).The prevalence rate of greenhouse farmer's lung in males was significantly higher than that in females(?2=39.93,P0.05).In the 308 cases,the number of patiernts presented with fever chill,cough/sputum,chest tightness/shortness of breath were 180(58.44%),192(62.34%),160(51.95%)respectively,and the number of crepitations,radiological changes,spirometry abnormalities and serum IgE antibodies(+)was 164(53.25%),153(49.68%),147(47.73%)and 136(44.16%)at the time of the study.62.34%(192/308)of patients with greenhouse farmer's lung were mild and 38.66%(116/308)were severe.Conclusion The total prevalence rate of greenhouse farmer's lung in part of rural areas of Liaoning Province was 5.7% and multiple risk factors were associated with the disease.