Objective To explore the effect of influenza vaccination on the prevention of respiratory tract infection in preschool children. Methods The clinical data of 400 preschool children (1-6 years old) who were diagnosed with respiratory tract infection for the first time in department of pediatrics of Xi'an Third Hospital and second department of respiratory medicine of Xi'an Children's Hospital were retrospectively analyzed from January 2023 to December 2023, including acute bronchitis, upper respiratory tract infection and pneumonia. According to the actual influenza vaccination status, the patients were divided into vaccination group (n=210) and non-vaccination group (n=190). The incidence of respiratory tract infection was compared between both groups. The fever duration, average course of disease, hospitalization rate, clinical symptoms scores (fever, cough, nasal congestion, sore throat), inflammation indicators [C-reactive protein (CRP), white blood cell count (WBC), neutrophil percentage (NE%)] and recurrence rate after 6 months of follow-up were compared. Results The incidence of respiratory tract infection in the vaccination group was significantly lower than that in the non-vaccination group (21.43% vs 43.16%, P<0.05), and the hospitalization rate was significantly lower compared with that in the non-vaccination group (P<0.05). The scores of fever, cough, nasal congestion and sore throat were lower in the vaccination group than those in the non-vaccination group (P<0.05), and the CRP, WBC and NE% were significantly lower compared to the non-vaccination group (P<0.05). After 6 months of follow-up, the recurrence rate in the vaccination group was 11.11% (5/45), which was significantly lower than 26.83% (22/82) in the non-vaccination group (χ²=0.038, P=4.288<0.05). Conclusion Influenza vaccination can effectively reduce the incidence of respiratory tract infection in preschool children, relieve the symptoms and shorten the disease course after infection. Its preventive effect on influenza is particularly significant, suggesting the importance of strengthening influenza vaccination in preschool children.

Objective To assess the clinical value of prognostic nutritional index(PNI)in predicting the prognosis of patients with advanced liver cancer treated with transarterial chemoembolization(TACE)combined with ablation therapy.Methods A total of 112 patients with advanced liver cancer,who received TACE combined with ablation at the Lishui Municipal Central Hospital of China from January 2020 to January 2024,were enrolled in this study.The general data,survival status,and survival time were collected.The Youden index of PNI was calculated using the receiver operating characteristic(ROC)curve model,and the optimal cutoff value was determined.Based on the optimal cutoff value,the patients were divided into low-PNI group and high-PNI group.The progression-free survival(PFS)and overall survival(OS)time were compared between the two groups,and the independent risk factors affecting PFS and OS were analyzed.Results The Youden index for PNI was 0.43,and the optimal cutoff value of PNI was 43.95.The low-PNI group included 65 patients,and the high-PNI group included 47 patients.There were no statistically significant differences in the baseline data between the two groups.The median PFS and the median OS in the high-PNI group were 13.21 months(95％CI=4.37-22.03)and 40.80 months(95％CI=31.55-50.05)respectively,which were longer than 9.20 months(95％CI=6.58-11.82)and 21.37 months(95％CI=16.56-26.17)respectively in the low-PNI group,the differences were statistically significant(both P＜0.05).The 6-month,one-year and 2-year PFS in the high-PNI group was 56.95％,47.25％and 33.87％respectively,which were higher than 43.95％,32.56％and 16.31％respectively in the low-PNI group.The one-year,2-year and 3-year cumulative survival rates in the high-PNI group were 80.77％,66.66％and 39.40％respectively,which were higher than 63.79％,34.31％and 27.75％respectively in the low-PNI group.Multivariate regression analysis indicated that the number of nodules,metastasis and PNI significantly affected OS,and metastasis and PNI strikingly affected PFS.High PNI was a protective factor for both PFS and OS.Conclusion For patients with advanced liver cancer treated with TACE combined with ablation therapy,PNI is an effective indicator for predicting the prognosis.

Objective To investigate the correlation between total oxidation state(TOS),superoxide dis-mutase(SOD),glutathione reductase(GR)and androgen receptor(AR)expression,as well as their predictive value for castration-resistant prostate cancer(CRPC).Methods A retrospective analysis was conducted on the clinical data of 382 patients with prostate cancer who received endocrine therapy in our hospital from Janu-ary 2021 to March 2023.These patients were divided into a CRPC group(91 cases)and a non-CRPC group(291 cases)based on whether they progressed to CRPC within one year.The clinical data of the two groups were compared,and the levels of TOS,SOD,GR,and AR expression before and after treatment were com-pared between the two groups.The correlation between TOS,SOD,GR,and AR expression was analyzed using the Spearman method.The relationship between TOS,SOD,GR,and AR expression in the CRPC group was analyzed using partial correlation analysis.Logistic regression analysis was used to investigate the impact of TOS,SOD,and GR on the occurrence of CRPC after 1 month of treatment,and receiver operating charac-teristic(ROC)curve analysis was used to evaluate the predictive efficacy of TOS,SOD,and GR on CRPC af-ter 1 month of treatment.Results Gleason score ≥8 and T4 in clinical stage in CRPC group were higher than those in non-CRPC group,and the difference was statistically significant(P＜0.05).After 1 month and 1 year of treatment,the positive expression rates of TOS and AR in both groups were higher than before treatment,while the levels of SOD and GR were lower than before treatment,with a statistically significant difference(P＜0.05).After 1 month and 1 year of treatment,the TOS level and AR positive expression rate in the CRPC group were higher than those in the non-CRPC group,while the SOD and GR levels were lower than those in the non-CRPC group,with statistical significance(P＜0.05).Spearman correlation analysis showed that TOS was positively correlated with AR expression in the CRPC group after 1 month and 1 year of treat-ment(P＜0.05),while SOD and GR were negatively correlated with AR expression(P＜0.05).Logistic re-gression analysis showed that,Gleason score ≥8,T4 in clinical stage,and TOS,SOD,and GR after 1 month of treatment were all associated with the occurrence of CRPC(P＜0.05).It was found that after adjusting for Gleason score and clinical stage,TOS,SOD,and GR were still independent factors for CRPC after 1 month of treatment(P＜0.05).The ROC curve analysis results showed that the area under the curve of TOS,SOD,and GR combined to predict CRPC after 1 month of treatment was 0.938(95％CI:0.908-0.960),which was higher than that of each indicator alone.Conclusion The expression of TOS,SOD,GR,and AR is correlated to some extent,and combined detection has certain predictive value for CRPC.It can be used as an auxiliary indicator for clinical prediction of CRPC and has certain guiding value for subsequent clinical decisions for patients.

Objective This study aims to develop an early in-hospital temperature management protocol for heat stroke patients and assess its effectiveness,providing guidance for rapid cooling and precise target temperature control.Methods The protocol was developed through a Delphi expert consultation combined with expert panel meetings.A multi-center,non-randomized,historical control study was conducted,utilizing convenience sampling to select heat stroke patients from the emergency departments of 7 tertiary hospitals in Zhejiang Province,China,between June and August 2024 as an experimental group.The protocol was implemented in this group,while the control group consisted of heat stroke patients treated between June and August 2022,prior to protocol implementation.Cooling rates,target temperature attainment rates,and clinical outcomes were compared between the 2 groups.Results The final protocol included 6 primary indicators,23 secondary indicators,and 56 tertiary indicators.After protocol implementation,the experimental group achieved a cooling rate of 0.08(0.05～0.09)℃/min within 0.5 hours,significantly higher than the control group,which had a rate of 0.04(0.02～0.06)℃/min(P＜0.001).The target temperature attainment rates at 0.5 hours and 2.0 hours were 55.93％and 98.31％,respectively,significantly higher than the rates of 15.87％and 61.11％in the control group(P＜0.001).The mechanical ventilation rate,hospitalization rate,ICU admission rate,and mortality rate in the experimental group were 25.42％,61.02％,44.07％,and 8.47％,respectively.Logistic regression analysis revealed that the early in-hospital temperature management protocol significantly reduced the risk of mechanical ventilation and hospitalization in heat stroke patients,with odds ratios(ORs)of 0.294 and 0.300,respectively(both P＜0.05).Conclusion The developed protocol for early in-hospital temperature management in heat stroke patients is scientific,systematic,and practical.It improves cooling rates and target temperature attainment,thereby enhancing the prognosis of heat stroke patients.

Objective To explore the prognostic value of serum glutathione reductase(GR),superoxide dismutase(SOD),cystatin C(Cys-C),homocysteine(Hcy)and lipoprotein a[Lp(a)]levels in patients with cerebral ischemic stroke(CIS),and to provide a reference for improving the prognosis of CIS patients.Methods 126 patients with CIS admitted to the 980th Hospital of Joint Logistics Support Force from June 2022 to April 2023 were selected as the observation group,another 126 healthy individuals were selected as the control group at a ratio of 1:1.The expression levels of GR,SOD,Cys-C,Hcy and Lp(a)in the two groups were detected and compared after admission and during physical examination.The degree of neurological deficit in patients with CIS was classified into mild(NIHSS:2～4 points,n=35),moderate(NIHSS:5～15 points,n=47),moderate-severe(NIHSS:16～20 points,n=26)and severe(NIHSS:21～42 points,n=18)according to the National Institutes of Health Stroke Scale(NIHSS).The expression of serum GR,SOD,Cys-C,Hcy and Lp(a)in patients with different degrees of neurological deficit was compared,and the correlation between each indicator and the degree of neurological deficit was analyzed.The observation group received intravenous thrombolytic therapy after admission and was re-examined one day after thrombolysis.After treatment,follow-up visits were conducted for 28 days.According to the patient's condition(modified Rankin scale),patients were divided into good prognosis(n=94)and poor prognosis groups(n=32).The levels of each indicator in patients with different prognoses were compared,and the predictive value of GR,SOD,Cys-C,Hcy and Lp(a)expression for poor prognosis and early warning were analyzed.Results The expression levels of serum GR(48.54±3.07U/L)and SOD(157.17±25.47U/ml)in the observation group were lower than those in the control group(61.68±3.15U/L,203.63±18.31U/ml),while the expression levels of Cys-C(1.24±0.28mg/L),Hcy(15.21±1.62μmol/L)and Lp(a)(386.53±52.16mg/L)were higher than those in the control group(0.82±0.23mg/L,9.58±0.60μmol/L,257.83±45.34mg/L),with statistically significant differences(t=13.011～36.582,all P<0.05).As the disease progressed,the expression levels of GR and SOD gradually decreased,while the expression levels of Cys-C,Hcy and Lp(a)gradually increased,with statistically significant differences(F=14.685～197.041,all P<0.05).Spearman analysis,GR and SOD were negatively correlated with the degree of neurological deficit in patients with CIS(r=-0.814,-0.753,all P<0.05),while Cys-C,Hcy and Lp(a)were positively correlated with the degree of neurological deficit in patients with CIS(r=0.647,0.782,0.724,all P<0.05).The expression of GR and SOD in patients with good prognosis at admission and 1 day after thrombolysis was higher than that in patients with poor prognosis(t=9.109,6.338;2.934,4.358,all P<0.05),while the expression of Cys-C,Hcy and Lp(a)was lower than that in patients with poor prognosis(t=5.246,5.118,8.561;4.636,5.298,7.461,all P<0.05).The AUC(95%CI)of combined prediction of GR,SOD,Cys-C,Hcy and Lp(a)at admission was 0.898(0.832～0.945),and the AUC(95%CI)of combined prediction of GR,SOD,Cys-C,Hcy and Lp(a)at 1 day after thrombolysis was 0.931(0.871～0.968).The RR(95%CI)values caused by the expression of GR,SOD,Cys-C,Hcy and Lp(a)at 1 day after thrombolysis were 2.868(1.594～5.161),3.194(1.807～5.645),0.155(0.082～0.291),0.150(0.071～0.319)and 0.227(0.119～0.435).Conclusion Abnormal changes in the levels of GR,SOD,Cys-C,Hcy and Lp(a)are closely related to the degree of neurological deficit and prognosis in patients with CIS.Early combined detection of GR,SOD,Cys-C,Hcy and Lp(a)levels has high predictive value and early warning for evaluating the poor prognosis of patients with CIS.

Objective:To evaluate the efficacy of cyclophosphamide in patients with T-cell large granular lymphocytic leukemia (T-LGLL) and the maintenance of treatment-free remission (TFR) following drug discontinuation.Methods:Clinical data were collected from 37 patients with T-LGLL who received oral cyclophosphamide at the Regenerative Medicine Clinic of the Institute of Hematology and Blood Diseases Hospital between June 2019 and March 2024. Patient clinical characteristics, treatment efficacy, and long-term TFR were analyzed.Results:The median age of the 37 patients was 60 years (range: 37-86), and 22 (59.5%) were male. Anemia was observed in 30 patients (81.1%), and 28 (75.7%) met the diagnostic criteria for secondary pure red cell aplasia. Neutropenia occurred in 15 patients (40.5%), lymphocytosis in 11 (29.7%), and thrombocytopenia in three (8.1%). Sixteen patients (43.2%) had not received prior immunosuppressive therapy (treatment-naive group), while 21 patients (56.8%) were refractory to or had relapsed after immunosuppressive treatment (refractory/relapsed group). All patients met the treatment criteria and received oral cyclophosphamide at doses of 50-100 mg/day. Among the 36 evaluable patients, hematologic remission was achieved in 25 (69.4%), with a median time of 2.0 months (range: 0.7-7.0). There was no statistically significant difference in remission rates between the treatment-naive and refractory/relapsed groups (68.5% vs. 66.7%, P=0.589). Among the 25 patients who achieved hematologic remission, 24 discontinued cyclophosphamide. With a median follow-up of 39.0 months (range: 8.0-56.0), the median TFR duration was not reached. The estimated TFR rates were (90.87± 6.16) % at 12 months and (75.72±11.04) % at 36 months. No significant difference in TFR was observed between the treatment-naive and refractory/relapsed groups ( P=0.451) . Conclusion:Oral cyclophosphamide is effective in the treatment of T-LGLL, and patients may maintain long-term TFR following drug discontinuation.

Objective To explore the prognostic value of serum glutathione reductase(GR),superoxide dismutase(SOD),cystatin C(Cys-C),homocysteine(Hcy)and lipoprotein a[Lp(a)]levels in patients with cerebral ischemic stroke(CIS),and to provide a reference for improving the prognosis of CIS patients.Methods 126 patients with CIS admitted to the 980th Hospital of Joint Logistics Support Force from June 2022 to April 2023 were selected as the observation group,another 126 healthy individuals were selected as the control group at a ratio of 1:1.The expression levels of GR,SOD,Cys-C,Hcy and Lp(a)in the two groups were detected and compared after admission and during physical examination.The degree of neurological deficit in patients with CIS was classified into mild(NIHSS:2～4 points,n=35),moderate(NIHSS:5～15 points,n=47),moderate-severe(NIHSS:16～20 points,n=26)and severe(NIHSS:21～42 points,n=18)according to the National Institutes of Health Stroke Scale(NIHSS).The expression of serum GR,SOD,Cys-C,Hcy and Lp(a)in patients with different degrees of neurological deficit was compared,and the correlation between each indicator and the degree of neurological deficit was analyzed.The observation group received intravenous thrombolytic therapy after admission and was re-examined one day after thrombolysis.After treatment,follow-up visits were conducted for 28 days.According to the patient's condition(modified Rankin scale),patients were divided into good prognosis(n=94)and poor prognosis groups(n=32).The levels of each indicator in patients with different prognoses were compared,and the predictive value of GR,SOD,Cys-C,Hcy and Lp(a)expression for poor prognosis and early warning were analyzed.Results The expression levels of serum GR(48.54±3.07U/L)and SOD(157.17±25.47U/ml)in the observation group were lower than those in the control group(61.68±3.15U/L,203.63±18.31U/ml),while the expression levels of Cys-C(1.24±0.28mg/L),Hcy(15.21±1.62μmol/L)and Lp(a)(386.53±52.16mg/L)were higher than those in the control group(0.82±0.23mg/L,9.58±0.60μmol/L,257.83±45.34mg/L),with statistically significant differences(t=13.011～36.582,all P<0.05).As the disease progressed,the expression levels of GR and SOD gradually decreased,while the expression levels of Cys-C,Hcy and Lp(a)gradually increased,with statistically significant differences(F=14.685～197.041,all P<0.05).Spearman analysis,GR and SOD were negatively correlated with the degree of neurological deficit in patients with CIS(r=-0.814,-0.753,all P<0.05),while Cys-C,Hcy and Lp(a)were positively correlated with the degree of neurological deficit in patients with CIS(r=0.647,0.782,0.724,all P<0.05).The expression of GR and SOD in patients with good prognosis at admission and 1 day after thrombolysis was higher than that in patients with poor prognosis(t=9.109,6.338;2.934,4.358,all P<0.05),while the expression of Cys-C,Hcy and Lp(a)was lower than that in patients with poor prognosis(t=5.246,5.118,8.561;4.636,5.298,7.461,all P<0.05).The AUC(95%CI)of combined prediction of GR,SOD,Cys-C,Hcy and Lp(a)at admission was 0.898(0.832～0.945),and the AUC(95%CI)of combined prediction of GR,SOD,Cys-C,Hcy and Lp(a)at 1 day after thrombolysis was 0.931(0.871～0.968).The RR(95%CI)values caused by the expression of GR,SOD,Cys-C,Hcy and Lp(a)at 1 day after thrombolysis were 2.868(1.594～5.161),3.194(1.807～5.645),0.155(0.082～0.291),0.150(0.071～0.319)and 0.227(0.119～0.435).Conclusion Abnormal changes in the levels of GR,SOD,Cys-C,Hcy and Lp(a)are closely related to the degree of neurological deficit and prognosis in patients with CIS.Early combined detection of GR,SOD,Cys-C,Hcy and Lp(a)levels has high predictive value and early warning for evaluating the poor prognosis of patients with CIS.

Objective This study aims to develop an early in-hospital temperature management protocol for heat stroke patients and assess its effectiveness,providing guidance for rapid cooling and precise target temperature control.Methods The protocol was developed through a Delphi expert consultation combined with expert panel meetings.A multi-center,non-randomized,historical control study was conducted,utilizing convenience sampling to select heat stroke patients from the emergency departments of 7 tertiary hospitals in Zhejiang Province,China,between June and August 2024 as an experimental group.The protocol was implemented in this group,while the control group consisted of heat stroke patients treated between June and August 2022,prior to protocol implementation.Cooling rates,target temperature attainment rates,and clinical outcomes were compared between the 2 groups.Results The final protocol included 6 primary indicators,23 secondary indicators,and 56 tertiary indicators.After protocol implementation,the experimental group achieved a cooling rate of 0.08(0.05～0.09)℃/min within 0.5 hours,significantly higher than the control group,which had a rate of 0.04(0.02～0.06)℃/min(P＜0.001).The target temperature attainment rates at 0.5 hours and 2.0 hours were 55.93％and 98.31％,respectively,significantly higher than the rates of 15.87％and 61.11％in the control group(P＜0.001).The mechanical ventilation rate,hospitalization rate,ICU admission rate,and mortality rate in the experimental group were 25.42％,61.02％,44.07％,and 8.47％,respectively.Logistic regression analysis revealed that the early in-hospital temperature management protocol significantly reduced the risk of mechanical ventilation and hospitalization in heat stroke patients,with odds ratios(ORs)of 0.294 and 0.300,respectively(both P＜0.05).Conclusion The developed protocol for early in-hospital temperature management in heat stroke patients is scientific,systematic,and practical.It improves cooling rates and target temperature attainment,thereby enhancing the prognosis of heat stroke patients.

Objective:To evaluate the efficacy of cyclophosphamide in patients with T-cell large granular lymphocytic leukemia (T-LGLL) and the maintenance of treatment-free remission (TFR) following drug discontinuation.Methods:Clinical data were collected from 37 patients with T-LGLL who received oral cyclophosphamide at the Regenerative Medicine Clinic of the Institute of Hematology and Blood Diseases Hospital between June 2019 and March 2024. Patient clinical characteristics, treatment efficacy, and long-term TFR were analyzed.Results:The median age of the 37 patients was 60 years (range: 37-86), and 22 (59.5%) were male. Anemia was observed in 30 patients (81.1%), and 28 (75.7%) met the diagnostic criteria for secondary pure red cell aplasia. Neutropenia occurred in 15 patients (40.5%), lymphocytosis in 11 (29.7%), and thrombocytopenia in three (8.1%). Sixteen patients (43.2%) had not received prior immunosuppressive therapy (treatment-naive group), while 21 patients (56.8%) were refractory to or had relapsed after immunosuppressive treatment (refractory/relapsed group). All patients met the treatment criteria and received oral cyclophosphamide at doses of 50-100 mg/day. Among the 36 evaluable patients, hematologic remission was achieved in 25 (69.4%), with a median time of 2.0 months (range: 0.7-7.0). There was no statistically significant difference in remission rates between the treatment-naive and refractory/relapsed groups (68.5% vs. 66.7%, P=0.589). Among the 25 patients who achieved hematologic remission, 24 discontinued cyclophosphamide. With a median follow-up of 39.0 months (range: 8.0-56.0), the median TFR duration was not reached. The estimated TFR rates were (90.87± 6.16) % at 12 months and (75.72±11.04) % at 36 months. No significant difference in TFR was observed between the treatment-naive and refractory/relapsed groups ( P=0.451) . Conclusion:Oral cyclophosphamide is effective in the treatment of T-LGLL, and patients may maintain long-term TFR following drug discontinuation.

Objective To investigate the regulatory effects of exosome microRNA-3614-5p(miR-3614-5p)derived from mesenchymal stem cells on the progression of preeclampsia(PE)in model rats and its related mechanisms.Methods Thirty-six SD rats(24 females and 12 males)were housed in cages at a female-to-male ratio of 2∶1 for natural conception.Twenty-four pregnant rats were randomly divided into sham group(sham group),PE model group(PE group)and exosome miR-3614-5p group(PE+exo group),with 8 rats in each group.The PE model was established by subcutaneous injection of 100 mg/kg NG-nitro-L-arginine methyl ester in PE group.PE model was constructed in PE+exo group.Meanwhile,160 μ g/ml exosome suspension(0.5 ml/individual/day)was intraperitoneally injected on the 14th day for 6 consecutive days,and the experiment lasted for 21 days.Sham group was given an equal amount of normal saline.Blood pressure and urinary protein concentration were measured on days 0,7,14 and 21 of pregnancy.The levels of miR-3614-5p,B lymphoblastoma-2(Bcl-2)and Bcl-associated X protein(Bax)mRNA were detected by RT-qPCR.The activity of Caspase-3,the levels of reactive oxygen species(ROS)and the content of malondialdehyde(MDA),glutathione(GSH)and ferrous ion(Fe2+)were detected by ELISA.Western blot was used to analyze the protein levels of the iron death-related protein glutathione peroxidase 4(GPx4)and solute carrier family 7 member 11(SLC7A11).Results Compared with the sham group,the expression of miR-3614-5p in the placental tissues(0.43±0.05 vs 1.01±0.07)and peripheral blood(0.51±0.07 vs 1.01±0.12)of rats in the PE group was down-regulated,with significant differences(t=19.070,10.180,all P＜0.01).Compared with supernatant liquid phase,miR-3614-5p in exosomes derived from MSCs was enriched.Compared with sham group,the diastolic blood pressure(175.43±6.02 mmHg vs 113.26±5.11 mmHg),systolic blood pressure(123.57±5.63 mmHg vs 82.63±5.26 mmHg)and urinary protein content(175.48±13.21 mg/ml vs 67.65±5.76 mg/ml)of rats in PE group were increased on the 21st day with statistical significante between groups(t=22.606,16.440,23.168,all P＜0.01).Compared with PE group,diastolic blood pressure(124.57±5.33 mmHg vs 175.43±6.02 mmHg),systolic blood pressure(89.76±3.88 mmHg vs 123.57±5.63 mmHg)and urinary protein content(97.69±7.23 mg/ml vs 175.48±13.21 mg/ml)in PE+exo group were decreased,and the differences between groups were significant(t=18.493,13.557,16.713,all P＜0.01).Compared with sham group,Caspase-3 activity(238.56％±13.22％vs 100.12％±5.93％),Bax level(3.18±0.71 vs 1.01±0.11),ROS level(387.65％±25.98％vs 100.51％±5.89％),MDA content(33.21±3.17 nmol/mg vs 14.83±2.69 nmol/mg)and Fe2+concentration(38.77±6.53 nmol/ml vs 17.51±3.15 nmol/ml)in placenta tissue of PE group were increased,while Bcl-2 level(0.47±0.08 vs 1.01±0.12),GSH content(4.12±1.22 nmol/mg vs 9.76±0.93 nmol/mg),GPX4 protein(0.48±0.06 vs 1.01±0.24)and SLC7A11 protein(0.51±0.11 vs 1.01±0.11)levels were decreased(t=6.459～32.863,all P＜0.01);Caspase-3 activity(117.35％±8.67％vs 238.56％±13.22％),Bax level(1.13±0.45 vs 3.18±0.71),ROS level(128.73％±14.37％vs 387.65％±25.98％),MDA content(18.13±3.89 nmol/mg vs 33.21±3.17 nmol/mg)and Fe2+concentration(19.05±3.45 nmol/ml vs 38.77±6.53 nmol/ml)in placental tissues of PE+exo group were decreased,while Bcl-2 level(1.04±0.11 vs 0.47±0.08),GSH content(7.86±1.07 nmol/mg vs 4.12±1.22 nmol/mg),GPX4 protein(0.98±0.14 vs 0.48±0.06)and SLC7A11 protein(1.11±0.09 vs 0.51±0.11)levels were increased compared with PE group,with significant differences between groups(t=6.093～29.633,all P＜0.01).Conclusion In the placental tissues and peripheral blood of PE rats,miR-3614-5p was down-regulated.Exosomes overexpressing miR-3614-5p derived from MSCs suppressed PE progression in rats by inhibiting ferroptosis.These results suggested that exosomes miR-3614-5p derived from MSCs may be a novel potential biomarker for PE treatment.