Cardiac fibrosis is characterized by an elevated amount of extracellular matrix (ECM) within the heart. However, the persistence of cardiac fibrosis ultimately diminishes contractility and precipitates cardiac dysfunction. Circular RNAs (circRNAs) are emerging as important regulators of cardiac fibrosis. Here, we elucidate the functional role of a specific circular RNA CELF1 in cardiac fibrosis and delineate a novel feedback loop mechanism. Functionally, circ-CELF1 was involved in enhancing fibrosis-related markers' expression and promoting the proliferation of cardiac fibroblasts (CFs), thereby exacerbating cardiac fibrosis. Mechanistically, circ-CELF1 reduced the ubiquitination-degradation rate of BRPF3, leading to an elevation of BRPF3 protein levels. Additionally, BRPF3 acted as a modular scaffold for the recruitment of histone acetyltransferase KAT7 to facilitate the induction of H3K14 acetylation within the promoters of the Celf1 gene. Thus, the transcription of Celf1 was dramatically activated, thereby inhibiting the subsequent response of their downstream target gene Smad7 expression to promote cardiac fibrosis. Moreover, Celf1 further promoted Celf1 pre-mRNA transcription and back-splicing, thereby establishing a feedback loop for circ-CELF1 production. Consequently, a novel feedback loop involving CELF1/circ-CELF1/BRPF3/KAT7 was established, suggesting that circ-CELF1 may serve as a potential novel therapeutic target for cardiac fibrosis.

To establish a highly specific,sensitive,and efficient method for detecting antibodies a-gainst the Erns protein of classical swine fever virus(CSFV),and to distinguish CSFV vaccine strains from wild strains infections in combination with the E2 subunit vaccine.The purified Erns protein of the CSFV expressed by baculovirus was conjugated to carboxylated magnetic beads as a solid-phase carrier and horseradish peroxidase(HRP),separately.A double-antigen sandwich chemiluminescent enzyme immunoassay(CLEIA)was developed by optimizing various reaction parameters using a fully automated chemiluminescence analyzer.This method was then applied to quantitatively detect Erns protein antibodies in sera from pigs infected with prevalent strains and those immunized with the CSFV E2 subunit vaccine and challenged with field strains.The results showed that the optimal conditions for coupling protein-to-magnetic bead were as follows:coupling buffer pH of 8.0,a protein coupling amount of 2.5 mg/g,blocking solution of 10％BSA,serum sample volume of 20 μL.The optimal dilution of enzyme-labeled antigen was at 1:500 with a one-step reaction time of 15 minutes.The cutoff value of the established CLEIA method for detecting CSFV Erns protein antibodies was 5.83 U/mL and a diagnostic sensitivity of 1:128.No cross-reac-tivity was observed with positive sera against African swine fever virus,pseudorabies virus,porcine circovirus type 2,porcine epidemic diarrhea virus,porcine reproductive and respiratory syndrome virus,or porcine gastroenteritis virus.Additionally,the method yielded negative results with sera from pigs immunized with the E2 subunit vaccine.In repeatability tests,the intra-assay coefficient of variation(CV)ranged from 0.77％to 11.56％,and the inter-assay CV ranged from 10.30％to 14.55％,both below 15％.The positive and negative concordance rates with a commercial CSFV Erns protein antibody detection kit were 95.24％and 92.71％,separately,with an overall concord-ance rate of 93.23％.The double-antigen sandwich chemiluminescence method established in this study exhibits high sensitivity,excellent repeatability,and suitability for automated detection,making it applicable for serological differentiation between CSFV E2 subunit vaccination and infec-tion with prevalent strains.

Objective To propose a lead attention network-based ST-T change recognition algorithm to detect ECG ST-T changes accurately.Methods Firstly,heartbeat signals were extracted through R-wave localization,and a 12-lead heartbeat matrix was generated by correlation-based screening and merging to realize data augmentation.Secondly,a lead attention module was constructed by combining depthwise convolution(DWConv)with the channel attention squeeze-and-excitation block(SE-block)structure to perceive the differences in ST-T status among electrocardiogram leads.Thirdly,the mapping output by two independent attention modules was fused and splicing with the original signal residual was carried out,so that attention information extraction and original information transfer were enhanced effectively.Finally,SE-ResNet was used as the backbone network to extract signal features to complete the classification and identification of ST-T changes.To validate the recognition performance of the proposed algorithm for ST-T changes in ECG,the 12-lead ECG data of 97 472 patients containing different ECG rhythms were collected for ablation and comparison experiments at the First Affiliated Hospital of Army Medical University.Results The proposed algorithm achieved an AUC of 0.965 with a sensitivity of 90.51%,specificity of 90.23%,positive predictive value of 89.24%and overall accuracy of 90.36%on an independent test set.Comparative analysis demonstrated superior performance to four benchmark architectures,including VGG16,ResNet18,MobileNetV3-Small and ShuffleNet,in terms of both classification accuracy and computational efficiency.Conclusion The algorithm designed can accurately detect ST-T changes and can be used for wearable ECG automatic analysis to assist in the early warning of cardiovascular diseases in both acute and chronic patients and highland residents.[Chinese Medical Equipment Journal,2025,46(7):1-11]

Objective To identify the most significantly compressed areas and the areas with the best recovery effects by analyzing the changes in vertebral height after percutaneous vertebroplasty(PVP)in patients with osteoporotic vertebral compression fractures(OVCF)through lateral radiographs.Methods A retrospective analysis was conducted on the lateral X-rays of 186 injured vertebrae from 142 patients hospitalized in our hospital's intervertebral disc center.The sagittal height of the vertebrae was measured at five different points before and after surgery,and the collected data were statistically analyzed using SPSS software.Results There were statistically significant differences in the heights of the five measured points before and after surgery within OVCF injured vertebrae(P＜0.05),in the ascending order:central＜mid-anterior＜mid-posterior＜anterior edge＜posterior edge.Comparison of the height parameters of the five measured points before and after surgery showed statistically significant differences(P＜0.01).In comparing the height restoration differences of the five measured points after PVP,the differences between central and mid-anterior,central and anterior edge,and mid-posterior and anterior edge were found not to be statistically significant(P＞0.05).The differences in height restoration for the remaining groups were statistically significant(P＜0.05),with the height restoration differences from highest to lowest being:mid-anterior,central,anterior edge,mid-posterior,posterior edge.Conclusion In patients with OVCF,the compression of the injured vertebra is most pronounced in the central part,followed by the mid-anterior part.PVP surgery can effectively restore the height of various parts of the injured vertebra,especially in the mid-anterior and central parts of the vertebral body,where the recovery effect is particularly significant.

Objective To investigate the relationship between polymorphisms at the rs3093030 and rs5498 loci of the intercellular adhesion molecule-1(ICAM-1)gene in combination with high sensitive C-reactive protein(hs-CRP)and susceptibility to type 2 diabetes mellitus complicated with HTN(T2MH)susceptibility.Methods 200 newly diagnosed T2DM patients,175 T2MH patients and 200 healthy controls from Affiliated Hospital of Guilin Medical University between September 2021 and January 2022.Single nucleotide polymorphisms(SNP)-scan high-throughput technology was used to detect the genotyping of serum rs3093030 and rs5498 polymorphisms in the study subjects and to detect hs-CRP levels in peripheral plasma to analysed and explore the correlation between them and the development of T2MH.Results The peripheral blood hs-CRP expression level of patients in the T2MH group[2.65(1.18,6.50)mg/L]was significantly higher than that in the T2DM group[1.82(0.80,4.48)mg/L]and healthy controls[1.02(0.54,2.29)mg/L],and the differences were statistically significant(Z=-2.729,-7.132,all P<0.001).After population classification by genotype,it was found that compared with healthy controls,rs3093030 CC(Z=-3.912,-5.800),rs5498 AA(Z=-3.293,-4.944)and AG(Z=-3.275,-4.872)genotypes had significantly higher hs-CRP levels.The peripheral blood hs-CRP levels of patients with rs3093030 CT genotype in the T2MH group were significantly higher than that of healthy controls(Z=-3.987),and the differences was statistically significant(all P<0.001),respectively.Meanwhile,regression analysis showed that HS-CRP was a risk factor for both T2MH group and healthy control group(OR=1.181,95%CI=1.095～1.274,P<0.001).Conclusion There is a correlation between ICAM-1 gene rs3093030 and rs5498 polymorphisms combined with hs-CRP levels in peripheral blood and the pathogenesis of T2MH patients.

Objective To analyze the relationship between the expression of ferroptosis markers in the tumor microenvironment(TME)and the prognosis of transcatheter arterial chemoembolization(TACE)for hepatocellular carcinoma(HCC).Methods This prospective observational study included 100 HCC patients who received TACE treatment at Langfang Hospital of Traditional Chinese Medicine from March 2019 to June 2021 as the study subjects.The levels of 8-isoprostaglandin F2α(8-iso-PGF2α),4-hydroxy-2-nonenal(4-HNE),8-hydroxy-2'deoxyguanosine(8-OH-dG)and hepcidin in plasma were evaluated by ELISA kit at baseline(1 day before TACE),1 day after TACE and 4～8 weeks.The changes of ferroptosis related markers during TACE treatment were compared.The difference between the level of 8-iso-PGF2α,4-HNE and the baseline 1 day after TACE treatment was recorded as △8-iso-PGF2α,△4-HNE.Results Compared with the baseline,the levels of 8-iso-PGF2α and 4-HNE increased significantly and the level of hepcidin decreased significantly one day after TACE treatment,and the differences were statistically significant(t=8.03,16.29,2.92,all P<0.05).Compared with 1 day after treatment,the levels of 8-iso-PGF2α,4-HNE decreased and the level of 8-OH-dG increased at 4～8 weeks after TACE treatment,and the differences were statistically significant(t=9.12,17.17,2.63,all P<0.05).Multivariate COX analysis showed that △8-iso-PGF2α,△4-HNE and 8-iso-PGF2α 1 day after TACE treatment were independent factors affecting the overall survival after TACE(Wald χ2=5.205,13.801,6.054,all P<0.05).The survival time of patients with △4-HNE>2.01 μg/ml was significantly longer than that of patients with △4-HNE≤2.01 μg/ml(Log-rank=5.718,P=0.017),and that of patients with△8-iso-PGF2α>1.75ng/ml was sig-nificantly longer than that of patients with△8-iso-PGF2≤1.75ng/ml(Log-rank=4.163,P=0.041).Conclusion The prognosis of HCC patients who are in a state of high ferroptosis(4-HNE and 8-iso-PGF2 increased)at 1 day after TACE treatment is better,which indicate that ferroptosis mediated HCC death induced by TACE treatment.

A case of multiple intracranial venous sinus thrombosis caused by a calreticulin(CALR)gene mutation in essential thrombocythemia is reported including the diagnosis,treatment process and outcome.The patient was a 39-year-old female presenting with headache,slurred speech and limb weakness.Physical examination revealed unclear speech,dysarthria and decreased muscle strength in the left limb.On the basis of anticoagulation therapy,mechanical thrombectomy,intrasinus contact thrombolysis,decompressive craniectomy and cytoreductive therapy targeting the cause were performed.After treatment,the venous sinuses were completely recanalized and the prognosis was good.There are no relevant literature reports on intracranial venous sinus thrombosis caused by CALR gene mutation in essential thrombocythemia.The diagnosis and treatment strategy of this case provide a reference for the identification and treatment of similar cases in clinical practice.

To establish a highly specific,sensitive,and efficient method for detecting antibodies a-gainst the Erns protein of classical swine fever virus(CSFV),and to distinguish CSFV vaccine strains from wild strains infections in combination with the E2 subunit vaccine.The purified Erns protein of the CSFV expressed by baculovirus was conjugated to carboxylated magnetic beads as a solid-phase carrier and horseradish peroxidase(HRP),separately.A double-antigen sandwich chemiluminescent enzyme immunoassay(CLEIA)was developed by optimizing various reaction parameters using a fully automated chemiluminescence analyzer.This method was then applied to quantitatively detect Erns protein antibodies in sera from pigs infected with prevalent strains and those immunized with the CSFV E2 subunit vaccine and challenged with field strains.The results showed that the optimal conditions for coupling protein-to-magnetic bead were as follows:coupling buffer pH of 8.0,a protein coupling amount of 2.5 mg/g,blocking solution of 10％BSA,serum sample volume of 20 μL.The optimal dilution of enzyme-labeled antigen was at 1:500 with a one-step reaction time of 15 minutes.The cutoff value of the established CLEIA method for detecting CSFV Erns protein antibodies was 5.83 U/mL and a diagnostic sensitivity of 1:128.No cross-reac-tivity was observed with positive sera against African swine fever virus,pseudorabies virus,porcine circovirus type 2,porcine epidemic diarrhea virus,porcine reproductive and respiratory syndrome virus,or porcine gastroenteritis virus.Additionally,the method yielded negative results with sera from pigs immunized with the E2 subunit vaccine.In repeatability tests,the intra-assay coefficient of variation(CV)ranged from 0.77％to 11.56％,and the inter-assay CV ranged from 10.30％to 14.55％,both below 15％.The positive and negative concordance rates with a commercial CSFV Erns protein antibody detection kit were 95.24％and 92.71％,separately,with an overall concord-ance rate of 93.23％.The double-antigen sandwich chemiluminescence method established in this study exhibits high sensitivity,excellent repeatability,and suitability for automated detection,making it applicable for serological differentiation between CSFV E2 subunit vaccination and infec-tion with prevalent strains.

Objective To investigate the relationship between polymorphisms at the rs3093030 and rs5498 loci of the intercellular adhesion molecule-1(ICAM-1)gene in combination with high sensitive C-reactive protein(hs-CRP)and susceptibility to type 2 diabetes mellitus complicated with HTN(T2MH)susceptibility.Methods 200 newly diagnosed T2DM patients,175 T2MH patients and 200 healthy controls from Affiliated Hospital of Guilin Medical University between September 2021 and January 2022.Single nucleotide polymorphisms(SNP)-scan high-throughput technology was used to detect the genotyping of serum rs3093030 and rs5498 polymorphisms in the study subjects and to detect hs-CRP levels in peripheral plasma to analysed and explore the correlation between them and the development of T2MH.Results The peripheral blood hs-CRP expression level of patients in the T2MH group[2.65(1.18,6.50)mg/L]was significantly higher than that in the T2DM group[1.82(0.80,4.48)mg/L]and healthy controls[1.02(0.54,2.29)mg/L],and the differences were statistically significant(Z=-2.729,-7.132,all P<0.001).After population classification by genotype,it was found that compared with healthy controls,rs3093030 CC(Z=-3.912,-5.800),rs5498 AA(Z=-3.293,-4.944)and AG(Z=-3.275,-4.872)genotypes had significantly higher hs-CRP levels.The peripheral blood hs-CRP levels of patients with rs3093030 CT genotype in the T2MH group were significantly higher than that of healthy controls(Z=-3.987),and the differences was statistically significant(all P<0.001),respectively.Meanwhile,regression analysis showed that HS-CRP was a risk factor for both T2MH group and healthy control group(OR=1.181,95%CI=1.095～1.274,P<0.001).Conclusion There is a correlation between ICAM-1 gene rs3093030 and rs5498 polymorphisms combined with hs-CRP levels in peripheral blood and the pathogenesis of T2MH patients.