The immunoregulatory effect of TLSF_(JM) on the levels of IP3,Ca~(2+) in activated T cells andthe expression of Fos protein was investigated by ABC immunohistochemistry technique and Fu-ra-2/AM labelled T cells and anion-exchange chromatography techniques in this paper.The re-sults showed that TLSF_(JM) can the same time,it can strongly inhibit the levels of IP3、Ca~(2+) in ac-tivated T cells.

The regulatory effect of CD3 McAb on the human fetal thymocyte proliferative response toTPA was investigated.It was shown that the CD3 McAb couldn't induce human fetal thymo-cyte proliferative response,but suppressed PHA-induced human fetal thymocyte proliferativeresponse and promoted TPA-induced proliferative response,in a dose dependent manner.Ex-ogenous rHuIL—2,but not rHuIL—1 ,could enhance the proliferative response to CD3 McAb.These results have significances for understanding the expression of CD3 antigen and it's func-tions.

OBJECTIVETo study the active constituents from Alternanthera philoxeroides.

METHODThe constituents were isolated with silica gel and Toyopearl HW-40C gel column chromatography and purified by HPLC. Their structures were elucidated by spectroscopy.

RESULTNine compounds were isolated and identified as phaeophytin a (1), pheophytin a' (2), oleanoic acid (3), beta-sitosterol (4), 3beta-hydroxystigmast-5-en-7-one (5), alpha-spinasterol (6), 24-methylenecycloartanol (7), cycloeucalenol (8), phytol (9).

CONCLUSIONCompounds 1,2,5,7-9 were isolated from this plant for the first time.

Amaranthaceae ; chemistry ; Chlorophyll ; chemistry ; isolation & purification ; Phytol ; chemistry ; isolation & purification ; Phytosterols ; chemistry ; isolation & purification ; Plant Leaves ; chemistry ; Plant Stems ; chemistry ; Plants, Medicinal ; chemistry

In order to study the possible mechanism of CD226 monoclonal antibody (mAb)-mediated intracellular message transduction in human umbilical vein endothelial cells (HUVECs), the influence of CD226 mAb and its cross-linking by secondary antibody (II Ab) on the concentration changes in [Ca(2+)](i) in the HUVECs under different conditions were determined by confocal laser scanning microscopy. The main results are as follows. (1) When the culture medium was balanced by Hanks Buffer, [Ca(2+)](i) in HUVECs increased slowly after stimulation by CD226 mAb, whereas [Ca(2+)](i) increase was accompanied by [Ca(2+)](o) decrease after the mAb was cross-linked by goat anti-mouse IgG. Then [Ca(2+)](i) and [Ca(2+)](o) all returned to the normal level. (2) When the culture medium was balanced by D-Hanks buffer, [Ca(2+)](i) in HUVECs showed little variation when the cells were stimulated by CD226 mAb, but [Ca(2+)](i) decreased markedly after cross-linking. (3) When HUVECs were pretreated with EGTA, there was no variation in [Ca(2+)](i) of HUVECs after CD226 mAb stimulation alone or cross-linking of the mAb. Our results suggest that stimulation by CD226 mAb and cross-linking by goat anti-mouse IgG induce the variation of [Ca(2+)](i) in HUVECs under different conditions and the variation of [Ca(2+)](i) in HUVECs may play an important role in many physiological and pathological processes.
Antibodies, Monoclonal ; pharmacology ; Antigens, Differentiation, T-Lymphocyte ; immunology ; Calcium ; metabolism ; Cells, Cultured ; Human Umbilical Vein Endothelial Cells ; metabolism ; physiology ; Humans

Now the clinical preservation methods of human red blood cells mainly include hypothermic storage (4 degrees C) and cryopreservation (-80 degrees C or -196 degrees C). The preservation time of hypothermic storage of red blood cells is relatively short and it is easy to be contaminated by microbes. Cryopreservation greatly prolongs the storage time, but it needs heavy storage equipments. Because the protective solutions in cryopreservation contain glycerol, red blood cells need complicated washing in order to remove glycerol. These shortage methods limit their application to some special conditions, such as war or natural disasters. Compared with conventional preservation methods of red blood cells, lyophilization has many advantages such as less weight, convenient transportation, room temperature preservation, prone to be rehydrated. In this review, the progress and challenge in the development of lyophilization of red blood cells, especially application of trehalose and its mechanism in the lyophilization of red blood cells were systematically discussed. This review can provide some theoretic guidance for developing a safe, simple and efficient preservation approach of red blood cells by lyophilization.
Blood Preservation ; Cryopreservation ; Erythrocytes ; Freeze Drying ; Humans ; Trehalose ; pharmacology

To study effect of vitrification state of protective solutions on recovery of red blood cells after lyophilization, four protective solutions composed of isotonic buffers containing 7% DMSO (v/v) and 20%, 30%, 40% or 50% polyvinylpyrrolidone (PVP) (w/v) were adopted. Vitrification state of protective solutions was examined first when white ice crystal appeared in any protective solution during freezing or thawing, if the used solution was not a vitrification solution. Red blood cells were lyophilized in MINILYO45 freeze-dryer after washing, mixing with protective solutions and prefreezing. After lyophilization, the samples were quickly rehydrated by 37 degrees C rehydration solution. The results showed that in vitrification and devitrification experiments, white ice crystal appeared in solution of 20% PVP + 7% DMSO and 30% PVP + 7% DMSO during freezing and thawing; vitrification appeared in solution of 40% PVP + 7% DMSO during freezing, but devitrification appeared during thawing; vitrification appeared in solution of 50% PVP + 7% DMSO during freezing and thawing. After rehydration, the recoveries of red blood cells and hemoglobin in 40% PVP + 7% DMSO group were (81.36 +/- 14.94)% and (77.54 +/- 12.86)%, which were significantly higher than that in 20% PVP + 7% DMSO, 30% PVP + 7% DMSO and 50% PVP + 7% DMSO groups (P < 0.01). The concentration of free hemoglobin in 40% PVP + 7% DMSO group was also significantly lower than that in other three groups (P < 0.01). With increase of PVP concentration in protective solutions, vitrification state and protective effect of these solutions also increased; when concentration of PVP in protective solution was 40% though it was not a vitrification solution, the effect of lyophilization was the best; but when concentration of PVP further increased to 50%, though it was a vitrification solution, the effect decreased. It is concluded that excessive vitrification state could not benefit lyophilization of red blood cells.
Cryoprotective Agents ; pharmacology ; Dimethyl Sulfoxide ; pharmacology ; Dose-Response Relationship, Drug ; Erythrocytes ; cytology ; drug effects ; ultrastructure ; Freeze Drying ; methods ; Humans ; Microscopy, Electron ; Povidone ; pharmacology

Objective To explore the activated brain region of acute epilepsy in cat model induced by pentylenetetrazol(FFZ)with manganese enhanced-functional MR imaging(ME-fMRI),and evaluate the application of ME-fMRI on localization of the activated brain.Methods Forty cats were divided into 4 groups by random number table method as epileptic A and B groups as well as control A and B groups. Cats of epileptic groups were injected with PTZ(55 mg/kg)intramuscularly,and those of control groups were injected with the saline at same dose.The behavior change in the epileptic and control group A was observed and electroencephalogram(EEG)was also undertaken.Cats of epileptic and control group B were performed ME-fMRI,and the percentage of the enhanced signal intensity was then calculated.Results After injection with PTZ(55 mg/kg)intramuscularly,epileptic seizure was all evoked,and then EEG recording showed spike-wave and polyspike-wave complexes.The neocortex of cats of epileptic group B was diffusely phanero-enhanced on ME-fMRI.The percent enhancement of signal intensity in cortex of frontal lobe,parietal lobe and occipital lobe was(34.6?5.7)% and that in cortex of temporal lobe with(22.9? 6.5)%,whereas those of control group B with(14.9?4.5)% and(11.6?3.2)% respectively.And there was significant difference between the above different localization of the brain in the two groups (t=-10.43,-5.46 respectively,P

Objective To observe the effect of ginsenoside Rb1,the most abundant ginsenoside in ginseng root,on differentiation and lipolysis of 3T3-L1 cells and to explore its anti-diabetic mechanism.Methods 3T3-L1 preadipoeytes were induced under standard differentiation process in the presence of 0.1,1,10,100?mol/L ginsenoside Rb_1 for 6 days.Oil red O staining,measurement of triglyceride contents and glucose uptake assay were performed.The expressions of mRNA and protein of PPAR?2,C/EBP?,ap2,glucose transporter (Glut) 1,and Glut4 were analysed with quantitative real time-PCR and Western blot.The binding affinity of Rb_1 to PPAR?-LBD was evaluated by Surface Plasmon Resonance (SPR).Lipolysis of adipocytes was examined by the measurement of glycerol released from adipoeytes treated with Rb_1 for 1 h.Results Ginsenoside Rb_1 facilitated differentiation of 3T3-L1 preadipoeytes in a dose-depondent manner.10?mol/L ginsenoside Rb_1 increased lipid accumulation by about 56%.Treatment of differentiating adipocytes with 10?mol/L ginsenoside Rb_1 increased the expressions of PPAR?2 and C/EBP?mRNA and protein,as well as mRNA expression of ap2,one of their target genes.After treatment of differentiating adipoeytes with Rb_1,basal and insulin-mediated glucose transport augmented significantly accompanied by up-regulations of mRNA and protein level of Glut4,but not of Glutl.SPR showed Rb_1 could bind to PPAR?which suggested Rb_1 was a ligand of PPAR?.Ginsenoside Rb_1 inhibited basal lipolysis in adipoeytos in a dose-dependent manner.However,it did not affect isoproterenol-stimulated lipolysis.Conclusion As a PPAR?ligand,ginsenoside Rb_1 promotes adipogenesis,inhibitas basal lipolysis and inereasos basal and insulin-mediated glucose transport in cultured adipoeytes.Therefore,anti-diabetic and insulin-sensitizing activity of ginsenosides is,at least in part,involved in the enhancing effect on PPAR?2 and C/EBP?expressions,hence promoting adipogenesis and glucose uptake,and inhibiting lipolysis in adipocytes.

BACKGROUND AND PURPOSE: This study evaluated the clinical value of detachable-balloon embolization for traumatic carotid-cavernous fistula (TCCF), focusing on the frequency, risk factors, and retreatment of recurrence. METHODS: Fifty-eight patients with TCCF underwent transarterial detachable-balloon embolization between October 2004 and March 2011. The clinical follow-up was performed every 3 months until up to 3 years postprocedure. Each patient was placed in either the recurrence group or the nonrecurrence group according to whether a recurrence developed after the first procedure. The relevant factors including gender, fistula location, interval between trauma and the interventional procedure, blood flow in the carotid-cavernous fistula, number of balloons, and whether the internal carotid artery (ICA) was sacrificed were evaluated. RESULTS: All 58 TCCFs were successfully treated with transarterial balloon embolization, including 7 patients with ICA sacrifice. Recurrent fistulas occurred in seven patients during the follow-up period. Univariate analysis indicated that the interval between trauma and the interventional procedure (p=0.006) might be the main factor related to the recurrence of TCCF. The second treatments involved ICA sacrifice in two patients, fistula embolization with balloons in four patients, and placement of a covered stent in one patient. CONCLUSIONS: Detachable balloons can still serve as the first-line treatment for TCCFs and recurrent TCCFs despite having a nonnegligible recurrence rate. Shortening the interval between trauma and the interventional procedure may reduce the risk of recurrence.
Balloon Occlusion ; Carotid Artery, Internal ; Fistula ; Follow-Up Studies ; Humans ; Recurrence ; Retreatment ; Risk Factors ; Stents

OBJECTIVETo use a new kind of fixing material, i.e. Sol-Gel organic-inorganic hybridized material to immobilize bacterium to detect Biochemical oxygen demand quickly.

METHODSThe biosensor was fabricated using a thin film in which Hansenula anomala was immobilized by sol-gel and an oxygen electrode. The optimum measurement for biochemical oxygen demand was at pH 7.0; 28 degrees C; response time 3 - 12 min. Pure organic compound, sewage and rate of recovery were detected with the biosensor.

RESULTSIt shows that the BOD biosensor can be used to detect many organic compounds such as amino acid, glucide. It is suitable to monitor sewage and industrial waste water which has low level alcohols and phenols. The microbial membrane can work 3 months and remain its 70% activity. It is measured that the rate of recovery of BOD is between 90% to 105% in sewage.

CONCLUSIONThe study confirmed the effectiveness and usefulness of BOD sensor, which is quick, convenient, low cost and reliable with little interference.

Bacteria ; Biosensing Techniques ; instrumentation ; Cells, Immobilized ; Gels ; Membranes, Artificial ; Nylons ; Oxygen ; analysis ; Sewage ; analysis ; microbiology