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Objective To investigate the effect of silencing MFG-E8 gene on the sensitivity of SKOV3 cells to anticancer drugs and related mechanisms. Methods SKOV3 cells were transfected with MFG-E8 siRNA (Msi) and NC siRNA (Csi), respectively and the efficiency of transfection was confirmed by Western blot. The sensitivity of SKOV3 cells to cisplatin was observed by CCK-8 assay after transfection. The mRNA expression of ABCB1 and ABCC1 were detected by qRT-PCR. Effect of silencing MFG-E8 on the expression of ETM-related protein was detected by qRT-PCR and Western blot. Results MFG-E8 siRNA could effectively silence the expression of MFG-E8 protein. With the increasing drug concentration, the proliferation inhibition rate of each group also increased, and the cell proliferation inhibition rate of MFG-E8 siRNA group increased significantly (P < 0.01). Compared with NC siRNA group, downregulation of MFG-E8 expression led to decreased SKOV3 cell proliferation at 48h or 72h after 3 μg/ml cisplatin treat ment (P < 0.05). qRT-PCR results showed that the mRNA expression of ABCB1 and ABCC1 in Msi group were significantly lower than those in Csi group. qRT-PCR and Western blot results showed that silencing MFG-E8 gene down-regulated the mRNA and protein expression of N-Cadherin, Vimentin and Snail and up-regulated the expression of E-Cadherin. Conclusion Silencing the MFG-E8 gene can increase the sensitivity of SKOV3 cells against anti-tumor drugs and down-regulate the mRNA expression of ABCB1 and ABCC1, which may be related to the inhibition of EMT progression.
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Objective:To study the correlations of neonatal hemodynamic parameters with gestational age (GA) and birth weight (BW) using non-invasive ultrasound cardiac output monitor (USCOM).Method:From March to September 2019, neonates with stable hemodynamics admitted to the Department of Neonatology of our hospital were enrolled in this prospective study. According to their GA, they were assigned into <29 w group, 29~33 w group, 34~36 w group and ≥37 w group. According to their BW, they were assigned into <1 000 g group, 1 000~1 499 g group, 1 500~2 499 g group and ≥2 500 g group. Cardiac output (CO), cardiac index (CI), stroke volume (SV), myocardial contractility (inotropy, INO), flow time corrected (FTC), systemic vascular resistance index (SVRI) and heart rate (HR) were measured using USCOM. The univariate linear regression method was used to analyze the correlation of hemodynamic parameters with different GA and BW.Result:A total of 120 neonates with stable hemodynamics were enrolled, including 69 males and 51 females. The average GA was (34.2±3.8)w and the average BW was (2 221±860) g. SV ( r=0.489, P<0.001), CO ( r=0.681, P<0.001), CI ( r=0.348, P<0.001), FTC ( r=0.266, P=0.003), INO ( r=0.446, P<0.001)and HR ( r=-0.322, P<0.001) showed significant linear correlations with GA. No linear correlation existed between SVRI ( r=-0.052, P=0.574) and GA. SV ( r=0.603, P<0.001), CO ( r=0.852, P<0.001), CI ( r=-0.390, P<0.001), INO ( r=0.576, P<0.001) and HR ( r=-0.440, P<0.001) showed significant linear correlations with BW. No significant linear correlations existed between SVRI ( r=-0.076, P=0.409) or FTC ( r=0.090, P=0.329) and BW. Conclusion:USCOM can monitor neonatal hemodynamic parameters in real-time.Hemodynamic parameters including SV, CO, CI and INO are significantly different among newborns with different GA and BW and these parameters are linearly correlated with GA and BW.
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Objective:To compare the effect of SMOF lipids composed of soybean oil, medium chain triglycerides, olive oil, and fish oil with medium-long chain mixed fat emulsions(Lipofundin) on parenteral nutrition-associated cholestasis(PNAC) in premature infants.Methods:Clinical data were collected from premature infants hospitalized in the neonatal intensive care unit of Shanghai Children′s Hospital from January 2018 to December 2019 with gestational age ≤34 weeks, birth weight ≤2 000 g, and duration of parenteral nutrition ≥14 days.They were devided into SMOF lipid group and Lipofundin group, and the incidence of PNAC, neonatal necrotizing enterocolitis(NEC), bronchopulmonary dysplasia(BPD), retinopathy of prematurity(ROP), periventricular-intraventricular hemorrhage(PVH-IVH), late-onset sepsis and liver function were compared between two groups.Results:The incidence of PNAC in the SMOF lipid group was significantly lower than that in Lipofundin group( P=0.042). The average level of ALT and AST in SMOF lipid group were markedly lower than those in Lipofundin group( P<0.05). The time to reach full enteral feeding of SMOF lipid group was shorter than that of Lipofundin group( P=0.005). There was no significant difference in the incidence of NEC, BPD, ROP, PVH-IVH, and late-onset sepsis between two groups( P>0.05). Conclusion:Compared with lipofundin, SMOF lipid can reduce the incidence of PNAC in premature infants, and has no significant effect on the incidence of NEC, BPD, ROP, PVH-IVH and late-onset sepsis.
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Objective To explore the dosimetric differences of radiotherapy plan for cervical cancer with 4 different fluence smoothing (FS) parameters using Monaco treatment planning system (Monaco TPS). Methods Fifteen patients with ⅠB2 stage cervical cancer in our hospital were enrolled in this study. And a 2 Volumetric Modulated Arc Therapy (VMAT) plan for each patient were completed by Monaco 5.11 TPS according to the X-Ray Voxel Monte Carlo (XVMC) method. For each plan was optimized by FS function, with the level of Off, Low, Medium and High. To compare the difference of plan optimization time, conformity index (CI), Homogeneity index (HI), Dmean, Dmin, D2% of PTV，dose to the organ at risk (OAR)，the number of Segments# and MU#，estimated total delivery time (ETDT), quantum Efficiency (QE) of the plans, the formation of Segments# with the same angle and verification of inserting 729 two-dimensional matrix into PTW octavius 4D module of different FS function levels, with the precondition of the Prescription isodose curve covering 95% of the target area. The data was analysed by multivariate factor analysis with the application of SPSS, and P < 0.05 was considered as statistically significant. And the Planned revenue score of different FS levels was also calculated. Results Except for the Dmin of PTV (the lowest value is (32.09 ± 0.26) Gy for the Off group, and the highest value is (35.98 ± 0.42) Gy for the High group), V40 of the rectum (the lowest value in the Medium group is 55.88% ± 2.02%, and the highest value in the High group was 61.90% ± 2.98%) and bladder (the lowest value was 45.01% ± 2.08% in the Medium group, and the highest value is 50.45% ± 1.98% in the High group), the V20 (the lowest value High group was 49.05% ± 1.98%, the highest value Off group was 56.52% ± 1.75%) of femoral head (P < 0.05), there was no significant difference of the dose assessment results for PTV and OARs in 4 different FS function levels. In the High level, the ETDT, QE and MU# were showed better than other groups evidently, however, the number of Segments# showed no significant difference. The plan validation results was increased with the improvement of FS function level, and the level of High was considered to be the optimal. To compare the score of overall benefits of the plan, the level of Medium (−17.18 ± 0.05) got the highest score, and the Low group (−17.58 ± 0.05) and the High group (−17.42 ± 0.06) have similar scores, and Off group (−18.81 ± 0.08) has the lowest score. Conclusion Different FS levels of the Monaco 5.11 TPS can optimize the radiotherapy plan for cervical cancer, but the level of Medium is considered to be the most applicable.
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Aconitum is one of the most widely used Chinese herbal medicines, and aconitine is the major toxic component in it. Aconitine can induce a variety of arrhythmias, resulting in death. Acute ethanol consumption causes arrhythmia as well. Poisoning cases caused by aconitum medicinal liquor are frequently encountered in the practice of forensic medicine. The molecular mechanisms of myocardial toxicity of these two drugs have much in common, and both of them affect the sodium channel, calcium channel and potassium channel of myocardial cell membrane and so on. This paper analyzes and discusses the possible co-effects of ethanol-aconitine on cardiomyocyte channel proteins, by reviewing researches on the mechanism of cardiotoxicity of ethanol and aconitine in recent years, in order to provide ideas and references for the research on the molecular mechanism of arrhythmia caused by combined poisoning.
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Humans , Aconitine , Aconitum , Arrhythmias, Cardiac , Drugs, Chinese Herbal , EthanolABSTRACT
Extracorporeal membrane oxygenation (ECMO) is by far one of the most advanced life support technology, which provides temporary cardiopulmonary support and earns precious time for patients waiting for the recovery of organ function.However, due to various factors and constraints, this technology is still at the initial stage of application in neonatal field in China.In the meantime, there are many problems to deal with.This article will mainly discuss about several aspects in ECMO management, including choice of patients, timing to start, choice of ECMO mode, management of running ECMO, complications and ethic issues.
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Objective The aim of this study was to search for a better individualized clinical radiotherapy scheme for breast cancer patients after modified radical mastectomy by comparing the dosimetric data on the radiotherapeutic techniques of three-dimensional conformal radiation therapy (3D-CRT) and volumetric modulated arc therapy (VMAT). Methods This retrospective study included 77 cases of breast cancer treated by modified radical mastectomy followed by radiotherapy in Hebei General Hospital from November 2015 to February 2019. According to the radiotherapeutic techniques used, we divided the patients into a 3D-CRT (n = 54) and a VMAT group (n = 23), Using the dose-volume histogram, we evaluated the dose parameters of the clinical target volume (CTV) and the organs at risk (OAR). Results Compared with the patients in the 3D-CRT group, those in the VMAT group showed significantly decreased V110% ([12.14 ± 14.03]% vs [7.18 ± 6.36]%, P < 0.05), increased conformity index (0.62 ± 0.11 vs 0.66 ± 0.09, P < 0.05), reduced ipsilateral lung dose ([1308.42 ± 276.49] vs [1114.34 ± 233.71] cGy, P < 0.05), V5 (P < 0.05) and V10 (P < 0.05), and elevated contralateral breast dose (P < 0.05) and V5 in those with left breast cancer ([63.49 ± 17.49]% vs [76.97 ± 11.81]%, P = 0.028). Conclusion VMAT can effectively reduce the average dose and the dose in the low-dose area of the ipsilateral lung of the breast cancer patient after modified radical mastectomy. VMAT and 3D-CRT each have its own advantages for specific patients.
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OBJECTIVE@#To investigate the mechanisms underlying ozone-induced inactivation of poliovirus type 1 (PV1).@*METHODS@#We used cell culture, long-overlapping RT-PCR, and spot hybridization assays to verify and accurately locate the sites of action of ozone that cause PV1 inactivation. We also employed recombinant viral genome RNA infection models to confirm our observations.@*RESULTS@#Our results indicated that ozone inactivated PV1 primarily by disrupting the 5'-non-coding region (5'-NCR) of the PV1 genome. Further study revealed that ozone specifically damaged the 80-124 nucleotide (nt) region in the 5'-NCR. Recombinant viral genome RNA infection models confirmed that PV1 lacking this region was non-infectious.@*CONCLUSION@#In this study, we not only elucidated the mechanisms by which ozone induces PV1 inactivation but also determined that the 80-124 nt region in the 5'-NCR is targeted by ozone to achieve this inactivation.
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Animals , 5' Untranslated Regions , Chlorocebus aethiops , Genome, Viral , Oxidants, Photochemical , Pharmacology , Ozone , Pharmacology , Poliovirus , Vero Cells , Virus InactivationABSTRACT
Objective To evaluate the safety,feasibility,complications and outcome of continuous renal replacement therapy (CRRT) in neonates weighting less than 3 000 g.Method A total of 6 neonates weighting less than 3 000 g treated with CRRT in the Department of Neonatology,Shanghai Children's hospital,from January 2015 to December 2017 were studied.The birth weight,primary disease,indications of CRRT,treatment duration,age,complications and outcome of the neonates were collected and analyzed.Serum creatinine (Scr),blood urea nitrogen (BUN) and blood ammonia were analyzed before and after CRRT.T test was used for statistical analysis of the data.Result (1) Among the 6 neonates,2 were full-term infants and 4 were premature infants.The average gestational age of the neonates was (35.0± 2.1) weeks and the average birth weight was (2 542±586) g.(2) The catheterization was successful in all of the 6 neonates.The model for CRRT was continuous veno-venous hemofiltration dialysis,and the duration was 50(48,154)h,the neonates' age of CRRT was 3.0(2.0,4.5)days.The primary disease included 3 perinatal asphyxia,1 hemolytic uremic syndrome,1 ornithine transcarboxylase deficiency,1 jejunal atresia.There were 5 patients with acute kidney injury and fluid overload,and another one with hyperammonemia.(3) Compared with before CRRT,serum creatinine,urea nitrogen and serum ammonia all decreased significantly and reached the normal range after CRRT.(4)The complications of CRRT in the 6 neonates included 2 hypotension,1 hypokalemia,1 hypocalcemia and 1 hypophosphatemia.Catheter related infection,blockage and other complications had not occurred.(5) After treatment,3 patients survived,1 witdrew and 2 died.Conclusion The application of CRRT in neonates with weight less than 3 000 g is safe and feasible,the prognosis and survival rate of which can be improved with fewer and controllable complications.
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Objective To study the clinical efficacy and safety of extracorporeal membrane oxygenation (ECMO) in critically ill neonates.Method From November 2016 to September 2018,the clinical data of 5 cases who received ECMO treatment in NICU of our hospital were retrospectively analyzed.The indication of ECMO was reversible respiratory failure irresponsive to conventional therapy.The treatment mode was V-A ECMO.Oxygenation index (OI),vasoactive-inotropic score,blood lactate before and 24 h after ECMO were recorded.Complications of ECMO were also studied.Paired t-test was used to compare the pre and post treatment parameters.Result Among the 5 cases,4 cases were male and 1 case was female.3 cases were diagnosed with meconium aspiration syndrome,2 cases pulmonary hypertension.OI[(9.5 ± 1.8) vs.(60.6 ± 19.4)],vasoactive-inotropic score[(19.5 ± 12.0) points vs.(204.0 ± 143.8) points]and blood lactate [(2.8 ± 1.5) mmol/L vs.(9.6 ± 3.6) mmol/L]) were all significantly decreased at 24 h after ECMO treatment (P ＜ 0.05).During follow-up,3 cases survived,2 cases died.All the 5 cases showed thrombocytopenia,3 cases developed renal failure and received continuous renal replacement therapy,1 case got intracranial hemorrhage.2 of the 3 survived cases developed neurological impairment and need long term follow-up and rehabilitation therapy.Conclusion ECMO treatment has remarkable effects on critically ill neonates and may actually save lives,but the risk of complications are quite high.
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Objective To study efficacy and safety of continuous renal replacement therapy (CRRT) in the treatment of neonatal sepsis-related acute kidney injury (AKI).Method From June 2011 to June 2018,neonates with sepsis-related AKI hospitalized in the neonatal intensive care unit of our hospital and treated with CRRT were enrolled.Before CRRT,12 h,24 h,48 h after CRRT and by the end of CRRT,their clinical data including renal function,acid-base balance,electrolytes,blood pressure (BP)and the change of hemodynamic indexes were retrospectively analysed.The efficacy and safety of CRRT was evaluated.Kruskal-wallis H test was used for statistical analysis.Result A total of 9 cases of sepsis-related AKI neonates were enrolled in the study,all treated with continuous veno-venous hemofiltration dialysis.5 cases had oliguria,2 cases fluid overload and 2 cases shock.The duration of CRRT was 49 ～ 110 h (76.2 ±23.5) h.12 h after CRRT,BP were maintained at 40 ～60 mmHg and stable during the treatment,the blood pH value increased to 7.35 ～ 7.45 and the oxygenation index reached 200 mmHg.24 h after CRRT,the oxygenation index rose to more than 300 mmHg.Serum potassium,urea nitrogen and creatinine levels decreased significantly after 12 h of CRRT,and reached the normal range after 24 h of CRRT.After 24 h of CRRT,the urine volume significantly increased.Venous catheterization was performed successfully in 9 cases.2 cases had thrombocytopenia,1 case catheterization obstruction and 1 case hypotension during CRRT.No complications such as hypothermia,hemorrhage,thrombosis or infection occurred.All 9 patients were cured and discharged.Conclusion CRRT is safe and effective for the treatment of neonatal sepsis-related AKI.
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Extracorporeal membrane oxygenation (ECMO) is by far one of the most advanced life support technology,which provides temporary cardiopulmonary support and earns precious time for patients waiting for the recovery of organ function.However,due to various factors and constraints,this technology is still at the initial stage of application in neonatal field in China.In the meantime,there are many problems to deal with.This article will mainly discuss about several aspects in ECMO management,including choice of patients,timing to start,choice of ECMO mode,management of running ECMO,complications and ethic issues.
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Objective To explore the efficacy of continuous renal replacement therapy (CRRT) in the treatment of neonatal acute kidney injury (AKI).Methods Totally 17 critically ill neonates treated with CRRT were selected who were hospitalized at Department of Neonatology,Shanghai Children's Hospital,Children's Hospital Affiliated to Shanghai Jiaotong University,from June 2012 to June 2017,and among them there were 15 cases with AKI,and the clinical data of these 15 patients were retrospectively analyzed,while 15 AKI neonates were treated with CRRT combined with conventional treatment.The model for CRRT was continuous veno-venous hemofiltration dialysis (CVVH-DF) in 13 cases,plasma exchange (PE) in 2 cases.The changes of blood pressure(BP),renal function,electrolyte,acid-base balance index and hemodynamic indicators were analyzed respectively before CRRT treatment,12 h,24 h,48 h after treatment and by the end of CRRT treatment.The efficacy of CRRT treatment was evaluated in these 15 AKI neonates.Results Gestational age of 15 AKI newborns was 33 +4-40 +1 weeks,admission day age was 2-28 days,birth weight was 2.25-4.00 kg.Primary diseases were severe asphyxia in 6 cases,neonatal septicemia in 5 cases,congenital hereditary metabolic disease in 2 cases,traumatic asphyxia in 1 case,and liver failure in 1 case.CRRT treatment persisted for 49-190 hours.BP value [(50.8 ± 6.57) mmHg(1 mmHg =0.133 kPa)] could reach normal level after 12 h CRRT treatment,and blood pH value (7.31 ± 0.25) increased significantly after 12 h CRRT treatment,while blood K+[(5.51 ±1.86) mmoL/L],urea nitrogen (BUN) [(9.5 ±3.7) mmol/L],creatinine(Cr) [(93± 14)μmol/L] significantly decreased after 12 h CRRT treatment,and reached the normal range [K + (4.78 ± 2.95)mmol/L,BUN (7.5 ±2.1) mmol/L,Cr (54 ± 13) μmol/L] after 24 h treatment,but urine volume[(0.8 ±0.2)mL/(kg· h)] significantly increased after 24 h treatment.Partial pressure of oxygen/fraction of inspired oxygen reached 200 mmHg after 12 h treatment and more than 300 mmHg after 24 h treatment.CRRT treatment of 15 AKI neonates turned out to be effective.Conclusions CRRT can effectively improve the internal environment of AKI neonates and reduce the death rate of neonatal AKI,which can provide an effective adjuvant treatment measures for the treatment of AKI neonates.
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ObjectiveTo investigate the timing and efficacy of continuous renal replacement therapy (CRRT) in neonatal acute kidney injury (AKI).MethodsNineteen AKI neonates treated with CRRT were enrolled during hospitalization in the Department of Neonatology of the Children's Hospital of Shanghai from June 2011 to June 2018. Their clinical data were retrospectively analyzed. According to their baseline renal function, these neonates were divided into two groups using an improved RIFLE (Risk, Injury, Failure, Loss and End-stage renal disease) standard: AKI stage 1-2 group and AKI stage 3 group. CRRT included continuous veno-venous hemodiafiltration (CVVHDF) and plasma exchange (PE). Several parameters included blood pressure (BP), renal function, electrolyte, blood gas and hemodynamic indicators were analyzed before, 12 h, 24 h, and 48 h after the initiation of CRRT and at the end of CRRT. Changes in neonatal renal function before, 24 h after the initiation of CRRT and at the end of CRRT were compared between the two groups. Efficacy of CRRT was evaluated, and clinical outcomes were analyzed. Kruskal-WallisH-test ort-test was applied for statistic analysis.Results(1) Among the 19 neonates with AKI, there were 12 in stage 1-2 and seven in stage 3. Seventeen cases were treated with CVVHDF, and the other two underwent plasma exchange. The duration of CRRT was 49-190 h with an average of (89.2±33.9) h. (2) After 12 h of CRRT, the blood pressure of all 19 AKI neonates returned to normal (40-60 mmHg, 1 mmHg=0.133 kPa) and was maintained at that level during the treatment. The blood pH value also increased to a normal range (7.35-7.45) at the same time. The oxygenation index reached 200 mmHg after 12 h of CRRT and rose to over 300 mmHg after 24 h. The levels of serum potassium, urea nitrogen, and creatinine decreased significantly after 12 h of CRRT and reached the normal range after 24 h of CRRT. After 24 h of CRRT, the urine volume significantly increased. (3) Serum levels of urea nitrogen and creatinine in neonates with AKI stage 1-2 decreased significantly after 24 h of CRRT. At any time points before and after CRRT (24 h before, 24 h after and at the end of CRRT), serum levels of urea nitrogen and creatinine in AKI stage 3 neonates were higher than those in AKI stage 1-2 neonates [urea nitrogen: (15.8± 4.1) mmol/L vs (10.2±5.1) mmol/L, (11.5±2.4) mmol/L vs (6.3±2.3) mmol/L, (9.8±2.1) mmol/L vs (5.1± 2.2) mmol/L,t=2.468, 2.226 and 2.171, respectively; creatinine: (184±32) μmol/L vs (152±26) μmol/L, (110±35) μmol/L vs (87±25) μmol/L, (63±12) μmol/L vs (44±9) μmol/L,t= 2.404, 2.423 and 3.972, respectively; allP<0.05]. (4) Venous catheterization was successful in the 19 AKI neonates. Three cases were complicated with thrombocytopenia, two with obstruction and two with hypotension during CRRT. Complications such as hypothermia, hemorrhage, thrombosis, and infection were not reported. (5) Among the 19 AKI neonates, 12 (including five of severe asphyxia, five of septic sepsis and two of inherited metabolic disorders and in metabolic crisis) were cured and discharged. The other seven cases (two in stage 1-2 and five in stage 3) lived through the oliguria stage but died after their family members gave up the treatment.ConclusionsCRRT is a safe and effective management for neonatal AKI. The optimal opportunity for CRRT treatment in AKI neonates should be at stage 1-2.
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Objective To investigate the diagnostic value of cerebrospinal fluid protein in the assess-ment of neurological outcome in preterm infants with sepsis. Methods A total of 80 preterm infants with sepsis were enrolled in the department of neonatology of Shanghai Children's Hospital from June 2014 to June 2016. The lumbar puncture was completed within 24 hours after diagnosis of sepsis,and the results of ce-rebrospinal fluid protein were obtained. The prognosis of neurological development was assessed according to Gesell Developmental Quotient ( DQ) at 6 months of adjusted gestational age. DQ> 85 was used as an indi-cator of good prognosis group. DQ≤85 was assigned to the poor prognosis group. The differences in protein content of cerebrospinal fluid between these two groups were retrospectively analyzed. The receiver operating characteristic ( ROC) curve was used to evaluate the diagnostic value of cerebrospinal fluid in evaluating the prognosis of preterm infants with sepsis. Results Cerebrospinal fluid protein content of poor prognosis group was higher than those in good prognosis group[(2005. 56 ± 582. 85)mg/L vs. (1367. 92 ± 362. 29)mg/L, t= -6. 019,P<0. 01]. The area under the ROC curve was 0. 819(95％CI 0. 711 -0. 927,P<0. 05). The optimal threshold of cerebrospinal fluid protein was 1560 mg/L with specificity of 75. 5％ and sensitivity of 81. 5％. Conclusion Cerebrospinal fluid protein content has certain diagnostic value on the assessment of sepsis premature neurological prognosis.
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Objective To evaluate the application value of bedside noninvasive hemodynamic monitoring in the diagnosis and treatment of neonatal septic shock.Methods The purchase time and use of Ultrasound Cardiac Output Monitor (USCOM) to monitor hemodynamic status were taken as the grouping condition,and the infants admitted to Department of Neonatology in Shanghai Children's Hospital from March 2014 to December 2016 were divided into 3 groups,16 of USCOM's pre-purchased septic shock infants were taken as non-USCOM monitoring group,20 patients with septic shock received USCOM monitoring as USCOM monitoring group,the other 20 non-septic shock neonates were assigned as a control group,whose primary diseases were premature,neonatal jaundice or neonatal pneumonia.Systolic volume (SV),cardiac output (CO),heart rate (HR),cardiac index (CI) and systemic vascular resistance index (SVRI) in USCOM monitoring group and control group were recorded.The doses of dopamine,dobutamine,epinephrine or norepinephrine and the time of vasoactive drug administration were compared between the USCOM monitoring group and non-USCOM monitoring group.The data of 3 groups were analyzed statistically.Results Compared with the control group,the hemodynamic parameters of the USCOM monitoring group before treatment such as CO [(0.68 ± 0.44)L/min vs.(0.44 ± 0.17) L/min,t =3.306,P =0.004],CI [(4.40 ± 1.88) L/(min · m2) vs.(3.00 ±0.40) L/(min · m2),t =3.328,P =0.004],SV [(3.90 ±2.39) cm3 vs.(3.08 ±0.31) cm3,t =2.227,P =0.038]and HR [(166.09 ± 26.20) times/min vs.(145.35 ± 16.16) times/min,t =2.750,P =0.013] were increased,while the SVRI showed an obvious decline [(795.88 ± 450.19) d · s/(cm5 · m2) vs.(1 160.61 ± 49.59)d · s/(cm5 · m2),t =-2.898,P =0.009],and the differences were statistically significant.While in the USCOM monitoring group after treatment,the CO [(0.56 ± 0.28) L/min vs.(0.68 ± 0.44) L/min,t =2.456,P =0.024] and CI [(3.65 ± 1.10) L/ (min · m2) vs.(4.40 ± 1.88) L/ (min · m2),t =2.614,P =0.017] were decreased significantly compared with those in USCOM monitoring group before treatment.Compared with non-USCOM monitoring group,the doses of dopamine [(45.72 ± 28.80) mg/kg vs.(85.83 ± 69.33) mg/kg,t =2.352,P =0.005],dobutamine [(12.81 ±26.18) mg/kg vs.(85.83 ±69.33) mg/kg,t =4.351,P =0.002],epinephrine [(0.11 ±0.33) mg/kg vs.(0.90± 1.75) mg/kg,t=1.986,P =0.014],and the time of vasoactive drug use [(68.10 ±34.37) h vs.(167.75 ± 117.14) h,t =3.626,P =0.001] were decreased significantly in USCOM monitoring group.The doses of norepinephrine [(1.91 ± 3.79) mg/kg vs.(0.47 ± 0.90) mg/kg,t =-1.481,P =0.046] were increased significantly in USCOM monitoring group.Conclusion The noninvasive hemodynamic monitoring plays an important role in the diagnosis and treatment of septic shock in neonates by clarifying the hemodynamic status of shock and guiding the rational use of vasoactive drugs so as to improve the successful rescue rate.
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Objective To explore the effect of cadmium chloride on mitochondrial function of hematopoietic stem cells in mouse bone marrow .Methods After being quarantined for one week , male Kunming mice weighted 20 ±2 g were randomly divided into three groups: control group , low dose cadmium-exposure group and high dose cadmium-exposure group.Mice in low dose and high dose cadmium-exposure groups were exposed to cadmium chloride solution at a dose of 7.5, 15 mg/kg body mass while those in control group were given an equal volume of distilled water through gavage administration every Monday , Wednesday and Friday for six consecutive weeks before cells in mouse bone marrow were collected at the 8th week.Mitochondrial membrane potential and ROS levels of mouse hematopoietic stem cells were detected using a flow cytometry .Results Compared with control group , the gain of body weight was significantly suppressed in cadmium-exposure group (P<0.01).Compared with control group, mitochondrial ROS levels of hematopoietic stem cells significantly increased in cadmium-exposure group and was dose-related(P<0.05,P<0.01). Besides, mitochondrial membrane potential of hematopoietic stem cells decreased in cadmium -exposure group compared with control group and was dose-related(P<0.05,P<0.01).Conclusion Cadmium exposure can lead to dose-related mitochondrial dysfunction of hematopoietic stem cells via oxidative damage in Kunming mice .
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Objective To test the changes of the potassium(K+)and magnesium(Mg2+)concentrations in vitreous humor of rabbits along with postmortem interval(PMI)under different temperatures, and explore the feasibility of PMI estimation using mixed-effect model. Methods After sacrifice, rabbit carcasses were preserved at 5℃, 15℃, 25℃ and 35℃, and 80-100μL of vitreous humor was collected by the double-eye alternating micro-sampling method at every 12 h. The concentrations of K+and Mg2+in vitreous humor were measured by a biochemical-immune analyser. The mixed-effect model was used to perform analy-sis and fitting, and established the equations for PMI estimation. The data detected from the samples that were stoned at 10℃, 20℃ and 30℃ with 20, 40 and 65 h were used to validate the equations of PMI estimation. Results The concentrations of K+and Mg2+[f(x,y)] in vitreous humor of rabbits under different temperature increased along with PMI(x). The relative equations of K+and Mg2+concentration with PMI and temperature under 5℃~35℃ were fK+(x,y)=3.413 0+0.309 2 x+0.337 6 y+0.010 83 xy-0.002 47 x2 (P<0.000 1), and fMg2+(x,y)=0.745 6+0.006 432 x+0.033 8 y(P<0.000 1), respectively. It was proved that the time of deviation for PMI estimation by K+and Mg2+was in 10 h when PMI was between 0 to 40 h, and the time of deviation was in 21 h when PMI was between 40 to 65 h. Conclusion In the ambient temperature range of 5℃-35℃, the mixed-effect model based on temperature and vitreous humor sub-stance concentrations can provide a new method for the practical application of vitreous humor chemi-cals for PMI estimation.
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Tibial dyschondroplasia (TD) cases has not been reported in Tibetan chickens (TBCs), but it is commonly seen in commercial broilers characterized by lameness. The underlying mechanism remains unclear. Hypoxia-inducible factors (HIFs) are important regulators of cellular adaptation to hypoxic conditions. In this study, we investigated the role of HIF-1α,
Subject(s)
Hypoxia , Blotting, Western , Chickens , Growth Plate , Osteochondrodysplasias , Poultry , Reverse Transcriptase Polymerase Chain Reaction , RNA , ThiramABSTRACT
Objective To explore the protective effect of long non-coding RNA(lncRNA) metasta-sis associated in lung denocarcinoma transcript 1 (MALAT1) involved in hyperoxia-induced lung injury in preterm infants.Methods This study had downloaded chip data set GSE25286 (Mouse GEO Genome 430 2.0 Array) from gene expression database gene expression omnibus (GEO),according to the state of hyperoxia exposure,the MALAT1 mRNA expression in rats normal lung tissues and hyperoxic lung tissues was compared at day 14th and 29th.In chip data set GSE43830(Human Exon 1.0 ST Arrays) from GEO,the expression of multi-ple genes[cell division cycle 6(CDC6),death effector domain containing 2(DEDD2),and Cyclin B1 (CCNB1)] in WI38 cells(lung fibroblasts) was compared before and after MALAT1 was knockout.At the same time,the peripheral blood samples of premature infants were collected to verify.Totally 40 premature infants were hospitalized in the department of neonatology in our hospital from Jan 2015 to Dec 2016,the pe-ripheral blood samples of 40 premature infants were collected.RNA was extracted and Real time-PCR was performed after reverse transcription,clinical data of these 40 cases were retrospectively analyzed. Results (1) By using Affymetrix Expression console and Affymetrix Transcriptome analysis console software source files of the chip of pretreatment and difference expression gene screening,the expression of lncRNA MALAT1 gene in lung tissues of hyperoxia lung injury mice significantly upregulated[fold change(FC) =2.33,P=0.001].(2) After MALAT1 in WI38 cell was knockout,MALAT1 expression was significantly reduced(FC= -15.6,P=0.000),the expression of CDC6(FC= -2.37,P=0.001) and CCNB1(FC=-2.16,P=0.002) were down regulated,DEDD2 expression was up regulated(FC =2.46,P =0.000). (3) The results of peripheral blood samples from preterm infants showed that the expression of MALAT1 was significantly increased in preterm infants with hyperoxia-induced lung injury(0.375 5 ± 0.081 9,t =4.634, P=0.015),compared with normal preterm infants(0.273 4 ± 0.067 3).Conclusion Through inhibiting cell apoptosis,lncRNA MALAT1 can protect preterm infants with hyperoxia-induced lung injury,it may provide a new strategy for prevention and treatment of hyperoxia-induced lung injury in premature infants.