Objective To investigate the clinical effects on the hypernatremia in elderly patients with ARDS treated by continu-ous veno-venous hemofiltration(CVVH) .Methods Eighteen cases of elderly patients with ARDS and hypernatremia were treated by CVVH ,the serum sodium concentration was observed and the displacement fluid composition was adjusted dynamically by serum sodium concentration ,the changes of kidney function ,gas index ,plasma osmotic pressure and APACHE Ⅱ score were recorded and analyzed .Results After treatment ,the plasma osmotic pressure of patients declined [(318 .5 ± 20 .2)mmol/L vs .(294 .4 ± 15 .1) mmol/L ,P<0 .01] .After treatment ,the oxygenation index rised [(157 .4 ± 34 .2) vs .(178 .4 ± 40 .4) ,P< 0 .05] ,APACHE Ⅱscore declined[(20 .8 ± 9 .4) vs .(14 .5 ± 8 .8) ,P<0 .05] ,and the comparison of after and before treatment was statistically signifi-cant .Conclusion Therapy method of elderly patients with ARDS and hypernatremia treated by CVVH can correct hypernatremia , improve oxygenation index and APACHE Ⅱ score effectively .

Objective To investigate the CT and MRI findings of primary hepatic neuroendocrine carcinomas.Methods Imaging findings of 6 patients with pathologically confirmed hepatic neuroendocrine carcinomas were retrospectively analyzed.Four patients underwent plain CT and contrast enhanced CT examinations.The other 2 patients underwent plain MRI and contrast enhanced MRI.Results One out of the 6 cases manifested multicentric tumor which appeared as one large tumor surrounded with multiple small nodules peripherally,and the tumors of the other 5 cases were solitary.On plain CT images,all lesions were well-defined and hypoattenuating with central areas of even lower density except punctuate calcifications at tumor periphery in 1 case.On pre-contrast MRI,the cases manifested heterogeneous low signal intensity on T1 wI and slightly high intensity on T2 WI.On dynamic contrast enhanced CT and MRI,Tumors manifested slight to mild enhancement in arterial phase,slight enhancement in portal venous phase or delayed phase with no enhancement in the center,accompanied by dislocation of surrounding vessels.There Was no lymphadenopathy in peritoneal cavity and retroperitoniurm. Conclusion CT and MRI scanning can demonstrate specific features of primary hepatic neuroendocrine carcinoma,which may help the diagnosis and differential diagnosis of the tumor.

Objective To observe the therapeutic effect and mechanism of the aqueous extract of ephedra sinica on brain damage after subarachnoid hemorrhage(SAH)in rats.Methods Totally 50 rats of Sprague-Dawley were randomly divided into control group,model group and three groups treated with different concentrations(4,12,36 mg/kg).The changes of the cerebral water content,malondialdehyde(MDA),glutathione peroxidase(GSH-Px)and hydroxy radical of brain tissue were recorded,and he-matoxylin-eosin(HE)staining was used to test the subarachnoid haemorrhagia and oedema,and immunohistochemistry and western blot were carried out to assay the expression of complement C3 in brains of different animal in different group 3d after operation. Results On the postoperative 3 days,compared with the model group,the content of MDA、GSH-Px activity and hydroxyl radical of 12、36 mg/kg treatment groups significantly reduced(P <0.01 ),the content of MDA of 4 mg/kg treatment group not change (P >0.05),but GSH-Px activity and inhibition of hydroxyl radical significantly reduced(P <0.01),and the cerebral water content of 12,36 mg/kg groups were obviously lower compared with model group.The expression of complement C3 was significantly lower on 36 mg/kg treatment group and edema reduced.Conclusion The aqueous extract of ephedra could significantly inhibit the activity of complement C3,prevent the production of MDA、GSH-Px and hydroxyl radical,reduce the severity of cerebral edema and the in-flammatory response,which has a better therapeutic effect SAH animals.

Objective To discuss the technique and value of preoperative reformatting with three-dimensional computed tomography technique for C_2 pedicle screw track.Methods GE Light Speed 16 Pro spinal CT scans of 15 adult dry vertebrae were loaded into an imaging station (software ADW4.2).Two methods of C_2 pedicle screw techniques were analyzed through virtual screw trajectory by VR (volume rendering) and MPR (multiple planar reformatting) techniques,in method A,screw entry point was the intersection between the media-vertical and the cranial line of C_2 inferior facet joint,in method B,the screw track was from the cranial and medial quadrant of the dorsal part of C_2 inferior facet joint.Results The screw track could be observed dynamically from any plane.Two vertebrae were ob- served with smaller height in isthmus and the medial edge of the transverse foramen since no space was a- vailable for the screw.The screw trajectories data were compared between method A and method B,which showed that the angles towards the cephalad (in sagittal plane) and midline (in transverse plane) were bigger in method A than in method B (P＜0.05,0.01),but the safe screw diameter was smaller in method A than in method B (P＜0.05),and there was no difference of the screw length between the two methods(P＜0.05 ).Conclusion In this research,the individual C_2 pedicle screw entry points, screw diameter and security screw angle can be simulated,and the screw track can be observed dynami- cally to make sure if it transits the bone structure completely.Preoperative three-dimensional computed tomography reformatting for pedicle screw track is of great value in clinical and basic researches.

5-hydroxtryptamine (5-HT, serotonin) has been recognized not only as a neurotransmitter and vasoactive agent, but also as a growth factor. 5-HT mainly binds to 5-HT(2) receptors or 5-HT(1) receptors on cell surface to stimulate cell proliferation through Ras or MAPK pathway in many cell types. It has been reported that 5-HT stimulates megakaryocytopoiesis via 5-HT receptors. The possible mechanism of 5-HT on the proliferation and differentiation of megakaryocytes (MK) has been discussed in this review article. In early stage of megakaryocytopoiesis, 5-HT may bind to 5-HT(2B) receptor on megakaryocytes, and promotes their proliferation and differentiation. In the late stage, 5-HT may involve in the platelet release procedure by inducing nitric oxide (NO) synthesis via 5-HT(2A) receptors. 5-HT can also antagonize the apoptotic effect induced by thrombospondin-1 (TSP-1) which is a platelet alpha granule protein and has synergic effect with platelet-derived growth factor (PDGF) to enhance megakaryocytes proliferation. Therefore, 5-HT is likely to be an important substance in the feedback regulation of thrombopoiesis. In this review the 5-HT and its receptors, 5-HT as cell growth factor, pathway of 5-HT stimulating cell proliferation and influance of 5-HT on MK-progenitor cells were summarized.
Humans ; Megakaryocytes ; physiology ; Receptors, Serotonin ; metabolism ; Receptors, Serotonin, 5-HT2 ; metabolism ; Serotonin ; metabolism ; pharmacology ; Thrombopoiesis ; physiology ; Thrombopoietin ; physiology

OBJECTIVETo evaluate the clinical efficacy and mechanism of Feiyangqin Rectum Condensed Liquid (FRCL) in treating children syncytial viral pneumonia. Methods Seventy-two patients were randomly divided into two groups, the 36 patients in the treated group were treated with FRCL, and the other 36 patients in the control group simply treated with Western medicine. Efficacy of treatment on clinical condition and some immune function (IgA, IgG, CD3, CD4) were observed.

RESULTSIn the treated group, 28 patients were cured (77.8%), treatment was markedly effective in 4 patients (11.1%), effective in 2 (5.5%) and ineffective in 2 (5.6%), with the total effective rate of 94.4%. The corresponding number in the control group was 20 (55.6%), 7 (19.4%), 6 (16.7%), 3 (8.3%) and 91.7%, respectively. The cure rate in the treated group was obviously superior to that in the control group (P < 0.05). FRCL could improve serum IgA, IgG, CD3, CD4, and CD4/CD8, lower serum IgE, these indexes in the treated group were significantly different to those in the control group (P < 0.05).

CONCLUSIONFRCL had the action in treating children syncytial viral pneumonia without any adverse reaction, one of its mechanisms might be related to its regulation on immune function.

Administration, Rectal ; Anti-Infective Agents ; therapeutic use ; Child, Preschool ; Drug Therapy, Combination ; Drugs, Chinese Herbal ; administration & dosage ; Female ; Humans ; Infant ; Male ; Phytotherapy ; Pneumonia, Viral ; drug therapy ; immunology ; Respiratory Syncytial Virus Infections ; drug therapy ; immunology

BACKGROUNDCellular cardiomyoplasty by transplantation of various cell types has been investigated as potential treatments for the improvement of cardiac function after myocardial injury. A major barrier for the clinical application of cell transplantation is obtaining sufficiently large quantities of suitable cells. Allogeneic cellular cardiomyoplasty may provide an alternative source of abundant, transplantable, myogenic cells by in vitro manipulation of cardiac fibroblasts using chemicals including 5-azacytidine. This study evaluated cardiomyogenic differentiation of cardiac fibroblasts, their survival in myocardial scar tissue, and the effect of the implanted cells on heart function.

METHODSPrimary cardiac fibroblasts from neonatal rats were treated with 5-azacytidine (10 µmol/L) or control. Treatment of 5-azacytidine caused myogenic differentiation of cultured cardiac fibroblasts, as defined by elongation and fusion into multinucleated myotubes with sarcomeric structures as identified by electron microscopy, and positive immunostaining for cardiac specific proteins, troponin I and β-myosin heavy chain (β-MHC) and the gap junction protein connexin 43. The myogenic cells (1.0 × 10⁶) were transplanted into the infarcted myocardium 2 weeks after coronary artery occlusion.

RESULTSBy 1 month after transplantation, the converted fibroblasts gave rise to a cluster of cardiac-like muscle cells that in the hearts occupied a large part of the scar with positive immunostaining for the myogenic proteins troponin I and β-MHC. Engrafted cells also expressed the gap junction protein connexin 43 in a disorganized manner. There was no positive staining in the control hearts treated with injections of culture medium. Heart function was evaluated at 6 weeks after myocardial injury with echocardiographic and hemodynamic measurements. Improvement in cardiac function was seen in the hearts transplanted with the 5-azacytidine-treated cardiac fibroblasts which was absent in the hearts treated with control.

CONCLUSIONThe 5-azacytidine has a unique capacity to induce myogenesis in cardiac fibroblasts in vitro and transplantation of cardiac-like muscle cells into ventricular scar tissue improves myocardial function.

Animals ; Azacitidine ; therapeutic use ; Cells, Cultured ; Fibroblasts ; drug effects ; transplantation ; ultrastructure ; Immunohistochemistry ; Microscopy, Electron, Transmission ; Myocardial Infarction ; drug therapy ; therapy ; Rats

ObjectiveTo evaluate the effects of combined vagus nerve electric stimulation postconditioning and limb remote ischemic postconditioning on myocardial ischemia-reperfusion (I/R) injury in rats.Methods One hundred male SD rats aged 8 weeks weighing 250-350 g were randomly allocated into 5 groups ( n =20 each):sham operation group (group S); I/R group; vagus nerve electric stimulation postconditioning group (group POES) ; limb remote ischemic postconditioning group (group RP) and vagus nerve electric stimulation postconditioning + limb remote ischemic postconditioning group (group POES-RP).Myocardial I/R was induced by occlusion of left anterior descending branch (LAD) of coronary artery for 30 min followed by 120 min reperfusion in groups I/R,POES,RP and POES-RP.In groups POES and POES-RP,right cervical vagus nerve trank was stimulated for 30 min with continuous electric rectangular pulses (2 ms,10 Hz) starting from 15 min of myocardial ischemia.The voltage of the pulses was adjusted to decrease HR by 10％ of the baseline HR before stimulation.In groups RP and POES-RP the animals underwent 10 min ischemia of bilateral hind limbs starting from 20 min of myocardial ischemia.Arterial blood samples were collected from 10 rats in each group at 120 min of reperfusion for determination of serum concentrations of cTnI,CK-MB,TNF-α,high mobility group box 1 protein (HMGB1),intercellular adhesion molecule-1(ICAM-1),IL-1,IL-6 and IL-10 (by ELISA).The animals were then sacrificed and myocardial infarct size was measured by Evans blue and TTC staining.Another 10 rats were sacrificed at 120 min of reperfusion for determination of myocardial contents of TNF-α,HMGB-1,ICAM-1,IL-1,ID6 and IL-10 (by ELISA).ResultsI/R induced myocardial infarct and significantly increased serum concentrations of cTnI,CK-MB,TNF-α,HMGBi,ICAM-1,IL-1 and IL-6 and increased myocardial contents ofTNF-α,HMGB1,ICAM-1,IL-1,IL-6 and IL-10 in both ischemic and non-ischemic regions in group I/R as compared with group S.Vagus nerve electric stimulation postconditioning,limb remote ischemic postconditioning and vagus nerve electric stimulation postconditioning + limb remote ischemic postconditioning significantly decreased myocardial infarct size and serum concentrations of cTnI,CK-MB,TNF-α,HMGB1,ICAM-1,IL-1 and IL-6 and decreased myocardial contents of TNF-α,HMGB1,ICAM-1,IL-1,IL-6 in groups POES,RP and POES-RP as compared with group I/R.Compared with group I/R,myocardial IL-10 content in both ischemic and non-ischemic regions was significantly increased in groups POES and POES-RP.Compmared with group POES,myocardial infarct size,serum concentrations of cTnI,CK-MB,TNF-α,ICAM-1 and myocardial contents of ICAM-1 and IL-6 in ischemic region were significantly decreased,while myocardial content of IL-10 in non-ischemic region was increased in group POES-RP.Compared with group RP,myocardial infarct size,serum concenuations of cTnI,CK-MB,TNF-α,HMGB1,ICAM-1,IL-1,IL-6 and myocardial contents of TNF-α,ICAM-1,IL-1 and IL-6 in ischemic region were significantly decreased,myocardial content of IL-10 in ischemic region was increased and HMGB1,ICAM-1,IL-1 and IL-6 contents were decreased,IL-10 content was increased in myocardial of ischemic region in group POES-RP.ConclusionMyocardial I/R injury is attenuated and myocardial protection is enhanced by combination of vagus nerve electric stimulation postconditioning and limb remote ischemic postconditioning in rats by inhibiting inflammatory response in rats.

OBJECTIVE: The purpose of this study is to determine the effects of propranolol on the left ventricular (LV) volume during CT coronary angiography. MATERIALS AND METHODS: The LV volume of 252 normal Chinese subjects (126 subjects with propranolol medication and 126 age- and gender-matched Chinese subjects without medication) was estimated using 64 slices multi-detector CT (MDCT). The heart rate difference was analyzed by the logistic linear regression model with variables that included gender, age, body height, body weight, systolic blood pressure (SBP), diastolic blood pressure (DBP) and the dosage of propranolol. The following global LV functional parameters were calculated: the real-end diastolic volume (EDV), the real-end systolic volume (ESV) and the real-ejection fraction (EF). RESULTS: The female subjects had a greater decrease of heart rate after taking propranolol. The difference of heart rate was negatively correlated with the dosage of propranolol. The real-EDV, the real-ESV and the real-EF ranged from 48.1 to 109 mL/m2, 6.1 to 57.1 mL/m2 and 41% to 88%, respectively. There was no significant difference in the SBP and DBP between the groups without and with propranolol medication (123 +/- 17 and 80 +/- 10 mmHg; 120 +/- 14 and 80 +/- 11 mmHg, respectively). The real-EDV showed no significant difference between these two groups, but the real-ESV and real-EF showed significant differences between these two groups (69.4 +/- 9.3 and 70.6 +/- 8.9 mL/m2; 23.5 +/- 5.7 and 25.6 +/- 3.7 mL/m2, 66.5 +/- 5.1% and 63.5 +/- 4.6%, respectively). CONCLUSION: The difference of heart rate is significantly influenced by gender and the dosage of propranolol. Propranolol will also increase the ESV, which contributes to a decreased EF, while the SBP, DBP and EDV are not statistically changed.
Adrenergic beta-Antagonists/*administration & dosage ; Case-Control Studies ; China ; Contrast Media/diagnostic use ; *Coronary Angiography ; Diastole ; Electrocardiography ; Female ; Heart Rate/*drug effects ; Humans ; Logistic Models ; Male ; Middle Aged ; Propranolol/*administration & dosage ; Radiographic Image Interpretation, Computer-Assisted ; Systole ; *Tomography, X-Ray Computed ; Triiodobenzoic Acids/diagnostic use ; Ventricular Function, Left/*drug effects

AIMTo study the therapeutic efficiency of amphotericin B liposome (AmB-L) targeting to the brain in mice with meningitis.

METHODSAmphotericin B liposome targeting to the brain were prepared by film-sonication method. Their concentration and encapsulation percentage were determined. The Candida albicans was injected into the brain of BALB/c mice and the meningitis model was set up. Then the therapeutic efficiency of amphotericin B liposome targeting to the brain was studied.

RESULTSThe encapsulation percentage of amphotericin B liposome was 93.3%. The meningitis model was set up after the Candida albicans was injected into the brain of BALB/c mice for 2 h. The therapeutic efficiency was increased after conjugating RMP-7 (the commercial nama is Cereport) to the surface of amphotericin B liposome.

CONCLUSIONThe therapeutic efficiency of Amphotericin B liposome targeting to the brain in the mice with meningitis was better than that of the common amphotericin B liposome and the life of the mice in AmB-L-PEG-RMP-7 group was longer than that of the mice in AmB-L-PEG group and AmB-L-PEG + RMP-7 group.

Amphotericin B ; administration & dosage ; pharmacokinetics ; therapeutic use ; Animals ; Antifungal Agents ; administration & dosage ; pharmacokinetics ; therapeutic use ; Biological Transport ; Blood-Brain Barrier ; drug effects ; Bradykinin ; analogs & derivatives ; pharmacology ; Brain ; metabolism ; Candida albicans ; Drug Delivery Systems ; Female ; Liposomes ; Male ; Meningitis, Fungal ; drug therapy ; microbiology ; Mice ; Mice, Inbred BALB C ; Rats ; Rats, Sprague-Dawley