Background: In acute and chronic renal inflammatory diseases, the activation of inflammatory cells is involved in the defect of erythropoietin (EPO) production. Ras guanine nucleotide-releasing protein-4 (RasGRP4) promotes renal inflammatory injury in type 2 diabetes mellitus (T2DM). Our study aimed to investigate the role and mechanism of RasGRP4 in the production of renal EPO in diabetes. Methods: The degree of tissue injury was observed by pathological staining. Inflammatory cell infiltration was analyzed by immunohistochemical staining. Serum EPO levels were detected by enzyme-linked immunosorbent assay, and EPO production and renal interstitial fibrosis were analyzed by immunofluorescence. Quantitative real-time polymerase chain reaction and Western blotting were used to detect the expression of key inflammatory factors and the activation of signaling pathways. In vitro, the interaction between peripheral blood mononuclear cells (PBMCs) and C3H10T1/2 cells was investigated via cell coculture experiments. Results: RasGRP4 decreased the expression of hypoxia-inducible factor 2-alpha (HIF2A) via the ubiquitination–proteasome degradation pathway and promoted myofibroblastic transformation by activating critical inflammatory pathways, consequently reducing the production of EPO in T2DM mice. Conclusion RasGRP4 participates in the production of renal EPO in diabetic mice by affecting the secretion of proinflammatory cytokines in PBMCs, degrading HIF2A, and promoting the myofibroblastic transformation of C3H10T1/2 cells.

Background: In acute and chronic renal inflammatory diseases, the activation of inflammatory cells is involved in the defect of erythropoietin (EPO) production. Ras guanine nucleotide-releasing protein-4 (RasGRP4) promotes renal inflammatory injury in type 2 diabetes mellitus (T2DM). Our study aimed to investigate the role and mechanism of RasGRP4 in the production of renal EPO in diabetes. Methods: The degree of tissue injury was observed by pathological staining. Inflammatory cell infiltration was analyzed by immunohistochemical staining. Serum EPO levels were detected by enzyme-linked immunosorbent assay, and EPO production and renal interstitial fibrosis were analyzed by immunofluorescence. Quantitative real-time polymerase chain reaction and Western blotting were used to detect the expression of key inflammatory factors and the activation of signaling pathways. In vitro, the interaction between peripheral blood mononuclear cells (PBMCs) and C3H10T1/2 cells was investigated via cell coculture experiments. Results: RasGRP4 decreased the expression of hypoxia-inducible factor 2-alpha (HIF2A) via the ubiquitination–proteasome degradation pathway and promoted myofibroblastic transformation by activating critical inflammatory pathways, consequently reducing the production of EPO in T2DM mice. Conclusion RasGRP4 participates in the production of renal EPO in diabetic mice by affecting the secretion of proinflammatory cytokines in PBMCs, degrading HIF2A, and promoting the myofibroblastic transformation of C3H10T1/2 cells.

Background: In acute and chronic renal inflammatory diseases, the activation of inflammatory cells is involved in the defect of erythropoietin (EPO) production. Ras guanine nucleotide-releasing protein-4 (RasGRP4) promotes renal inflammatory injury in type 2 diabetes mellitus (T2DM). Our study aimed to investigate the role and mechanism of RasGRP4 in the production of renal EPO in diabetes. Methods: The degree of tissue injury was observed by pathological staining. Inflammatory cell infiltration was analyzed by immunohistochemical staining. Serum EPO levels were detected by enzyme-linked immunosorbent assay, and EPO production and renal interstitial fibrosis were analyzed by immunofluorescence. Quantitative real-time polymerase chain reaction and Western blotting were used to detect the expression of key inflammatory factors and the activation of signaling pathways. In vitro, the interaction between peripheral blood mononuclear cells (PBMCs) and C3H10T1/2 cells was investigated via cell coculture experiments. Results: RasGRP4 decreased the expression of hypoxia-inducible factor 2-alpha (HIF2A) via the ubiquitination–proteasome degradation pathway and promoted myofibroblastic transformation by activating critical inflammatory pathways, consequently reducing the production of EPO in T2DM mice. Conclusion RasGRP4 participates in the production of renal EPO in diabetic mice by affecting the secretion of proinflammatory cytokines in PBMCs, degrading HIF2A, and promoting the myofibroblastic transformation of C3H10T1/2 cells.

Background: In acute and chronic renal inflammatory diseases, the activation of inflammatory cells is involved in the defect of erythropoietin (EPO) production. Ras guanine nucleotide-releasing protein-4 (RasGRP4) promotes renal inflammatory injury in type 2 diabetes mellitus (T2DM). Our study aimed to investigate the role and mechanism of RasGRP4 in the production of renal EPO in diabetes. Methods: The degree of tissue injury was observed by pathological staining. Inflammatory cell infiltration was analyzed by immunohistochemical staining. Serum EPO levels were detected by enzyme-linked immunosorbent assay, and EPO production and renal interstitial fibrosis were analyzed by immunofluorescence. Quantitative real-time polymerase chain reaction and Western blotting were used to detect the expression of key inflammatory factors and the activation of signaling pathways. In vitro, the interaction between peripheral blood mononuclear cells (PBMCs) and C3H10T1/2 cells was investigated via cell coculture experiments. Results: RasGRP4 decreased the expression of hypoxia-inducible factor 2-alpha (HIF2A) via the ubiquitination–proteasome degradation pathway and promoted myofibroblastic transformation by activating critical inflammatory pathways, consequently reducing the production of EPO in T2DM mice. Conclusion RasGRP4 participates in the production of renal EPO in diabetic mice by affecting the secretion of proinflammatory cytokines in PBMCs, degrading HIF2A, and promoting the myofibroblastic transformation of C3H10T1/2 cells.

Doxorubicin is a commonly used antitumor drug for the treatment of various cancers.How-ever,its clinical application is greatly restricted by its severe cardiotoxicity.At present,doxorubicin-induced cardiotoxicity is categorized into acute and chronic forms,depending on the dosage and dura-tion of exposure,which may eventually lead to the occurrence of heart failure.The pathogenesis of doxorubicin cardiotoxicity is associated with oxidative stress,mitochondrial damage,calcium overload,dysregulation of autophagy,and apoptosis.In forensic medical practice,cases of poisoning or even car-diac death caused by doxorubicin showed no obvious changes in cardiac morphology through routine forensic pathological examinations.The paper aims to summarize the research on the mechanisms of action of doxorubicin-induced cardiotoxicity in recent years,analyze and discuss the possible pathways of cardiomyocyte injury caused by doxorubicin,and provide references for research on the mechanisms of doxorubicin-induced cardiotoxicity and forensic application.

Objective We made a bidirectional two-sample Mendelian randomization(MR)analysis to investigate the causal connection between metabolites and atopic dermatitis(AD).Methods Single nucleotide polymorphic(SNP)sites associated with metabolites were extracted from the aggregated data of a genome-wide association study(GWAS)as instrumental variables.Causal association between six metabolites and AD was analyzed using the TwoSampleMR package in R software.The primary methods employed included inverse variance weighted(IVW),MR Egger,and weighted median.Heterogeneity testing was conducted using Cochran's Q statistics.MR Egger intercept was employed to test for level pleiotropy.Additionally,sensitivity analysis was carried out using the"leave-one-out"approach.Results The IVW analysis results indicated that ascorbic acid(OR=0.861,95％CI:0.751-0.987),arachidonic acid(OR=0.363,95％CI:0.193-0.683),and cortisone(OR=0.447,95％CI:0.221-0.906)were negatively correlated with the occurrence of AD,while uridine(OR=3.473,95％CI:1.043-11.562),serotonin(OR=1.896,95％CI:1.007-3.571),and 2-hydroxyglutaric acid(OR=2.158,95％CI:1.186-3.924)were positively correlated with the occurrence of AD,and the differences were statistically significant.Conclusion There is no significant evidence supporting a causal association between AD and metabolic disorder,but this study identified potential evidence for a causal effect of six metabolic factors on an increased risk of AD.

Objective To observe the safety and effectiveness of single dose intravenous infusion of tranexamic acid(TX-A)in dual level posterior lumbar interbody fusion(PLIF),and to explore the changes and trends in perioperative white blood cell(WBC),erythrocyte sedimentation rate(ESR),and C-reactive protein(CRP).Methods Between October 2020 and September 2022,46 patients with lumbar degenerative disease were treated with dual level PLIF,including 18 males and 28 females,with an average age of(60.24±10.68)years old,from 34 to 80 years old.They were divided into observation group and control group according to different treatment methods.There were 28 patients in the observation group,including 12 males and 16 females,with an average age of(61.04±9.03)years old.There were 3 cases with lumbar disc herniation(LDH),lumbar spinal stenosis(LSS)18 cases,lumbar spondylolisthesis(LS)7 cases.TXA(1 g/100 ml)was administered intravenously 15 min before skin incision after general anesthesia.The control group consisted of 18 patients,including 6 males and 12 females,with an average age of(59.00±13.04)years old.There were 5 cases with LDH,LSS 9 cases,LS 4 cases,and TXA was not used.The operation time,intraoperative bleeding volume,postoperative drainage volume,postoperative deep vein thrombosis(DVT),postoperative hospital stay,postoperative activated partial thromboplastin time(APTT),prothrombin time(PT),thrombin time(TT),fibrinogen(FIB),platelet(PLT),red blood cell(RBC),hemoglobin(HB),hematocrit(HCT),the first day,the fourth day,the seventh day and the last tested after operation WBC,ESR and CRP were recorded.Results The postop-erative wounds of the patients healed well and there was no DVT.46 patients were followed up from 3 to 6 months.The intraop-erative blood loss was 400.0(300.0,500.0)ml and the postoperative drainage was 260.0(220.0,450.0)ml in the observation group,which were lower than the control group[600.0(400.0,1000.0)ml,395.0(300.0,450.0)ml],P＜0.05.There was no significant difference between the two groups in operation time,postoperative hospital stay,postoperative APTT,PT,TT,FIB,PLT,RBC,HB,HCT,and postoperative WBC,ESR and CRP at different times(P＞0.05).Conclusion Single dose intravenous infusion of TXA can reduce the blood loss of bi-segmental PLIF,and has no significant effect on WBC,ESR and CRP after op-eration.

Humans ; Iron/therapeutic use* ; Heart Failure/drug therapy* ; Dietary Supplements

Objective:To investigate the effect of single nucleotide variation of osteoprotegerin (OPG) gene on the occurrence of osteoporosis (OP) in patients with gestational diabetes mellitus (GDM) .Methods:From Apr. 2018 to Apr. 2022, 276 pregnant women with GDM who underwent prenatal examination and gave birth in Linyi People’s Hospital were collected for analysis, general data were collected and bone mineral density was tested. According to the bone mineral density test results, they were divided into normal group and OP group. The OPG genotype was tested, and the general information, OPG genotype and allele frequency of the two groups were compared. The differences in bone mineral density among different genotypes of OPG were compared, and the genotypes affecting the risk of OP in GDM patients were analyzed.Results:There was no significant difference in the general data of the two groups of patients (all P>0.05). The allelic distribution of the rs3134069 and rs2073618 loci of the OPG gene in the two groups of patients conformed to the Hardy-Weinberg equilibrium law (all P>0.05). There was a statistically significant difference in the frequency of the AC genotype at rs3134069 between the two groups ( χ2=7.75, P=0.005). Taking patients with the AA genotype as a reference, patients with the AC genotype had a lower risk of developing OP ( OR=0.15, 95% CI: 0.03-0.59). There was a statistically significant difference in the frequency of CC genotype at rs2073618 between the two groups ( χ2=11.30, P=0.001). Taking patients with GG genotype as a reference, patients with CC genotype had a higher risk of developing OP ( OR=7.42, 95% CI: 2.19-27.18). Comparing rs3134069 and rs2073618 loci, there was no significant difference in bone mineral density at each part of the three genotypes (all P>0.05). The multivariate Logistic regression model showed that the AC genotype of rs3134069 ( OR=0.18, 95% CI: 0.03-0.70, P=0.029) was a protective factor for the induction of OP, while GC genotype of rs2073618 ( OR=6.86, 95% CI: 1.57-27.15, P=0.007) were the risk factors for OP in GDM patients. Conclusion:The CC genotype of rs2073618 is significantly positively correlated with the susceptibility to OP in GDM patients.

Objective:To investigate the effects of ursolic acid (UA) on proliferation, migration and iron death of ectopic endometrial stromal cells (EESCs) and its mechanism.Methods:Mouse model of endometriosis was established and the primary EESCs were isolated. The cells were treated with UA at different concentrations (0, 2.5, 5, 10, 20, 40, 50, 80, 100, 200 μmol/L). The cells were divided into Control group (normal culture), 2.5 μmol/L UA group (2.5 μmol/L UA treatment), 5.0 μmol/L UA group (5.0 μmol/L UA treatment), 10.0 μmol/L UA group (10 μmol/L UA treatment), and UA+DUSP19 group (10 μmol/L UA+50 μmol/L JAK2/STAT3 signal pathway activator DUSP19 treatment). Cell survival rate was detected by CCK-8 method. Cell proliferation was detected by plate cloning method. Transwell chamber assay was used to detect cell migration. The levels of Fe 2+ and the contents of malondialdehyde (MDA), reactive oxygen species (ROS) and superoxide dismutase (SOD) were detected by kit. Protein expression levels of Ki67, PCNA, CyclinD1, p-JAK2, p-STAT3, JAK2 and STAT3 were detected by western blot. Results:The number of clones in Control, 2.5 μmol/L UA, 5.0 μmol/L UA and 10.0 μmol/L UA groups were as follows: 152.22±15.47, 121.22±11.54, 92.00±5.54, 66.44±6.88; Ki67 protein expression was 1.08±0.10, 0.73±0.07, 0.61±0.06, 0.45±0.02, respectively; The expression of PCNA protein was 0.85±0.07, 0.64±0.05, 0.41±0.03, 0.31±0.05, respectively; CyclinD1 protein expression levels were 0.98±0.11, 0.65±0.06, 0.51±0.05, 0.42±0.07, respectively. The migration numbers were 92.78±6.27, 62.22±2.20, 50.22±4.59 and 39.11±4.33, respectively; Fe 2+ levels were (1.06±0.07) μmol/g, (1.21±0.11) μmol/g, (1.33±0.08) μmol/g, (1.47±0.09) μmol/g, respectively; MDA content was (0.48±0.06) μmol/g, (0.65±0.07) μmol/g, (0.85±0.08) μmol/g, (1.03±0.11) μmol/g, respectively; ROS contents were (19.85±1.21) %, (24.83±2.79) %, (29.04±1.86) %, (33.87±2.45) %, respectively; SOD content were (36.41±3.56) U/mg, (31.03±2.81) U/mg, (25.63±2.84) U/mg, (19.62±1.67) U/mg, respectively; p-JAK2 protein expression was 0.85±0.10, 0.75±0.06, 0.53±0.05, 0.31±0.03, respectively; p-STAT3 protein expression was 1.08±0.11, 0.79±0.06, 0.63±0.07, 0.42±0.03, respectively. The p-JAK2 protein content in UA group and UA+DUSP19 group was 0.38±0.05 and 0.75±0.08, respectively; p-STAT3 protein expression was 0.46±0.04 and 0.80±0.03, respectively; The cell survival rates were (52.55±2.44) % and (82.18±4.72) %, respectively; Fe 2+ levels were (1.57±0.06) μmol/g and (1.21±0.13) μmol/g, respectively. The differences in the above indicators between the Control group and the 2.5 μmol/L UA group, 5.0 μmol/L UA group and 10.0 μmol/L UA group were statistically significant ( P<0.05). There were statistically significant differences among 2.5 μmol/L UA group, 5.0 μmol/L UA group and 10.0 μmol/L UA group ( P<0.05). There were statistically significant differences in p-JAK2, p-STAT3, cell survival rate and Fe 2+ levels between UA group and UA+DUSP19 group ( P<0.05) . Conclusion:Ursolic acid can inhibit the proliferation and migration of EESCs cells and induce iron death by regulating JAK2/STAT3 signaling pathway, thus playing a protective role in endometriosis.