Objective To explore the clinical features and prognosis of arrhythmia in newborn infants.Methods Eighty children with arrhythmia were diagnosed by physical examination and electrocardiogram monitoring in author's hospital from Jan.2004 to Dec.2006.Their clinical features and 24-hour dynamic electrocardiogram were analyzed at the acute stage and followed up.Results Out of 80 cases of arrhythimics,52 cases were boys and 28 cases were girls,with an average age of 4 days on diagnosis of arrhythmias.Forty-five neonates presented with supraventricular arrhythmia,accounting for 56.3%.Their clinical presentations were atypical,and the hypoxia,infection,electrolyte disturbances and metabolic disorders were the main causes of the arrhythmias.After supportive and anti-arrhythmia treatment,18 cases of arrhythmias disappeared of 25 children with premature atrial beats;10 cases of 21 children with premature ventricular beats were cured,2 cases of 4 children with ventricular tachycardia,1 case died;2 cases of 3 children with supraventricular tachycardia didn't occure;3 cases of 5 with atrio-ventricular block were cured.The prognosis was better in supraventricular arrhythmias than that in ventricular and other arrhythmias at discharge.At the follow-up of(1.2?0.7)years,there were no differences in rates of recovery between supraventricular arrhythmias and ventricular arrhythmias.Conclusions Supraventricular arrhythmia was the most common type of arrhythmias in neonates.Most of the arrhythmia in neonates might be functional and could recover without treatment.Supraventricular arrhythmia usually had better prognosis in acute period.Only a few neonates with severe arrhythmia need anti-arrhythmias treatment.

OBJECTIVETo evaluate the effect of electro-acupuncture (EA) on gastric mucosal oxygenation and systemic inflammatory response in patients undergoing endoscopic sinus surgery with controlled hypotension (CH), and to explore its protective effect on gastric mucosa.

METHODSFifty-four patients, 18-65 years old, grade I-II of American Society of Anesthesiology (ASA), who were scheduled for endoscopic sinus surgery were randomly assigned to two groups, group A (general anesthesia group) and group B (general anesthesia combined EA anesthesia group), 27 in each group. Conrolled hypotension was executed during operation, and mean arterial pressure (MAP) was maintained at 55-65 mmHg. After tracheal intubation gastric tesiometer catheter was indwelled through nasal cavity or oral cavity. After successful indwelling, it was connected with gastric mucosa monitoring mode of multifunctional parameters monitor. Patients' MAP and heart rate (HR), pHi, partial pressure of carbon dioxide (PgCO2), arterial partial pressure of carbon dioxide (Pg-aCO2) and endtidal pressure of carbon dioxide (Pg-etCO2) were measured and recorded at T, (immediately before induced hypotension), T, (20 min following induced hypotension to target MAP), T2 (40 min following induced hypotension to target MAP), T3 (20 min after ending induced hypotension), and T4(40 min after ending induced hypotension). Blood samples were intravenously collected, TNF-alpha, IL-1, and IL-6 were detected by ELISA 24 h before operation, during operation (T3), and 24 h after operation.

RESULTSAfter hypotension was induced, Pg-CO2, Pg-aCO2 and Pg-etCO2 increased significantly (P < 0.01, P < 0.05), while pHi decreased significantly (P < 0.01) in both groups at T1-T4 than those at T0. During T1-T4, PgCO2, Pg-aCO2, and Pg-etCO2 were higher (P < 0.01, P < 0.05), while pHi was lower in group A than in group B (P < 0.01). Furthermore, TNF-alpha, IL-1, and IL-6 increased significantly in both groups during operation and 24 h after operation, when compared with those 24 h before operation (P < 0.01, P < 0.05). TNF-alpha and IL-1 in group A were higher than those in group B (P < 0.05) during operation and 24 h after operation, but with no significant difference in the plasma concentration of IL-6 (P > 0.05).

CONCLUSIONEA exerted obvious protective effect of gastric mucosal injury in endoscopic sinus surgery with controlled hypotension, which might be achieved by increasing gastric mucosal blood flow, maintaining oxygen supply and demand, inhibiting inflammatory response, and alleviating injury of gastric mucosal barrier.

Acupuncture Analgesia ; methods ; Adolescent ; Adult ; Aged ; Anesthesia, General ; Arteries ; Blood Pressure ; Electroacupuncture ; methods ; Endoscopy ; Female ; Gastric Mucosa ; surgery ; Heart Rate ; Humans ; Hypotension, Controlled ; Interleukin-1 ; Interleukin-6 ; Male ; Middle Aged ; Tumor Necrosis Factor-alpha ; Young Adult

Placentation,which is critical for maternal-fetal exchange of nutrients and gases,is a complicated process comprising stepwise vasculogenesis and angiogenesis.Hypoxia caused by impairedtrophoblast invasion may cause various angiogenic abnormalities in human placenta.The Notchl signaling pathway plays an important role in the regulation of angiogenesis.The angiogenesis of human umbilical vein endothelial cells (HUVECs) under normal/hypoxic conditions and the mRNA/protein level of Notchl/Dell4/Jaggedl were investigated in this study.The effects of DAPT/JAG-1 on the migration of HUVECs were also assessed by cell wound healing assay,so as to discover the possible role of notchl signaling pathway in the angiogenesis of human placenta.The results showed that angiogenic ability of HUVECs was seriously reduced under hypoxic conditions.The mRNA and protein levels of Notchl/Dell4/Jaggedl were decreased in the hypoxic group compared to the control one.In addition,the migration capability of HUVECs was significantly obstructed when treated with DAPT and under hopoxic condition,but promoted when treated with JAG-1.The above results demonstrate that hypoxia downregulates the angiogenesis in human placenta via Notch 1 signaling pathway.

Objective To study the expression of VEGF,Cox2 and mPGES in colon cancer.Methods VEGF,Cox2 and mPGES mRNA expression in 32 paired samples(tumor and adjacent normal tissue)were de- termined by using real time RT-PCR.Results VEGF was overexpressed in 19 of 32(59.3 %)tumor tissues compared with that in 6 of 32(18.7 %)adjacent normal tissue;COX2 was overexpressed in 20 of 32(62.5 %) tumor tissues compared with that in 5 of 32(15.6 %)adjacent normal tissue;mPGES was overexpressed in 24 of 32(75 %)tumor tissues compared with that in 9 of 32(28.12 %)adjacent normal tissue.Conclusion Our result suggested that VEGF165,mPGES and COX2 overexpressed in colon cancer.

N-type voltage-gated calcium (Ca²⁺) channels (N-type VGCC, Ca_V2.2) mediate Ca²⁺ influx in response to action potential at the presynaptic terminal, and play an important role in synaptogenesis, neurotransmitter release and nociceptive signal transduction. It is a new target for the development of drugs for the treatment of neuralgia (chronic pain) and other major diseases. Due to the difficulty of calcium channel expression in vitro and the detection of channel current, there is a great lack of new drug screening models. In this study, we established and optimized the electrophysiological drug screening model using Xenopus laevis oocytes for the recombinant expression of Ca_V2.2 in vitro (this study were reviewed and approved by the Ethics Committee of Guangxi University, approval number: GXU-2023-0249). Firstly, the linear plasmids encoding cDNA of major subunit α1B and auxiliary subunits α2δ1 and β3 of rat Ca_V2.2 were used as templates for in vitro transcription to generate their related mRNA (cRNA), after which three kinds of cRNA were injected into Xenopus laevis oocytes at the mass ratio of 2∶1∶1 for expression. The two-electrode voltage clamp (TEVC) technique was used to detect the inward current produced by Ca_V2.2. At the same time, the expression conditions of Ca_V2.2 were optimized, and its gating function was characterized from the aspects of channel activation and inactivation. The results showed that 3-5 days after cRNA microinjection, stable Ca_V2.2-mediated barium ion (Ba²⁺) currents were successfully detected. The interference of endogenous potassium channels and Ca²⁺-activated chloride channels can be eliminated by tetraethylammonium hydroxide (TEAOH) and 1,2-bis(2-aminophenoxy)ethane-N,N,N',N'-tetraacetic acid tetrakis (BAPTA-AM) treatment. The maximum potential for Ca_V2.2 activation is 0 mV, and the current reverses to be outward when the membrane potential is greater than +50 mV. By fitting the steady-state activation and inactivation curves, the half-maximal activation potential and half-maximal inactivation potential of Ca_V2.2 are identified as -15.9 and -60.2 mV. In this study, a stable Ca_V2.2 expression system was established based on Xenopus laevis oocytes. The in vitro expression system can provide a new way for the screening of Ca_V2.2 active compounds or lead drugs.

Adolescent ; Adult ; Aged ; Aged, 80 and over ; Animals ; Bone Marrow ; metabolism ; Brain ; metabolism ; Brain Neoplasms ; metabolism ; pathology ; CDC2 Protein Kinase ; metabolism ; Cell Line, Tumor ; Child ; Child, Preschool ; Female ; Gene Expression Regulation, Neoplastic ; Glioma ; classification ; metabolism ; pathology ; Humans ; Male ; Mice ; Mice, Nude ; Middle Aged ; Neoplasm Transplantation ; Neoplastic Stem Cells ; metabolism ; Young Adult

BACKGROUND: It is easy to established human solid tumor nude mouse model, but for leukemia which is difficult. We inhibited immune system further by radioactive ray or CTX, to decrease cost and increase the stability.OBJECTIVE: To establish a human acute myeloblastic leukemia M2 Kasumi-1 models containing AML/ETO positive genes in BALB/c nude mouse. METHODS: Nude mice were randomly divided into three groups: CTX group was injected CTX 2 mg/day in abdominal cavity for two days, and injected 8×10~5/mouse Kasumi-1 cells in caudal vein next day; irradiation group was exposed to total body irradiation, and injected 8×10~5/mouse Kasumi-1 cells in caudal vein that day; untreated group was inoculated with 8×10~5/mouse Kasumi-1 cells by caudal vein injection. Three additional mice were considered as the normal control group. The blood smearing and bone morrow slides were detected, immunity type of BMC was detected using flow cytometry, loading of leukemic cellular tumor was detected using RT-PCR, and positive ratio of AML/ETO fusion gene was detected using FISH method. RESULTS AND CONCLUSION: After inoculated into untreated nude mice by caudal vein injection for 14 days, the ratio of leukemia cell in blood smearing was 3.5%, and over 40% in bone marrow slides, which was equal to the results of FISH and FCM. The increasing of tumor loading was time-dependent. For irradiation group and CTX treated group, the tumor loading was higher that untreated group, and the cells also survived more than 60 days. AML/ETO band was observed by RT-PCR in all experimental groups, for normal mice it was negative. The results indicated that the systemic disseminated leukemia model was established successfully by caudal vein injection 8×10~5/mouse Kasumi-1 cells in the three experimental groups.

Objective To evaluate the effect of various iterative reconstruction methods on phase analysis of gated myocardial perfusion imaging (MPI). Methods Thirty consecutive patients scanned by the Philips CardioMD system were recruited into this study. The gated SPECT (GSPECT) data were reconstructed with filtered backprojection (FBP),maximum likelihood expectation maximization (MLEM),three-di-mensional (3D) resolution recovery MLEM (AST),attenuation corrected (AC) MLEM,AC and 3D Monte Carlo scatter corrected (ACSC) MLEM methods. Parameters of left ventricular ( LV ) dyssynchrony ( phase standard deviation and histogram bandwidth) were measured using the software SyncTool. Paired t-test was used to compare the differences of the LV dyssynchrony indices between FBP and MLEM,AC MLEM,ACSC MLEM,AST respectively. Results The phase standard deviations of stress GSPECT MPI for FBP,MLEM,AC MLEM,ACSC MLEM,and AST were 11.6°,10.9°,11.2°,11.6°,11.4° respectively;while the histogram bandwidths were 35.7°,34.3°,35.1°,36.9°,35. 1 ° respectively. The phase standard deviations of rest GSPECT MPI for FBP,MLEM,AC MLEM,ACSC MLEM and AST were 15.2°,14. 5°,15.4° ,15. 4°,14.8° respectively; while the histogram bandwidths were 47.3°,46.4°,46.4° ,47.9°,46.1 ° respectively. No statistical significance was observed between the FBP and various iterative reconstruction methods for both the stress and rest GSPECT MPI study (t:-1. 179 to 1.554,P＞0.05 forall). Conclusion The standard FBP reconstruction method is accurate enough for the measurement of LV dyssynchrony indices using the widely used clinical software SyncTool.

To investigate the chemical constituents in the stems of Chirita longgangensis var. hongyao, methanol extract of the stems was subjected to column chromatography with various chromatographic techniques. One new beta-naphthalenecarboxylic acid biglycoside, 1, 4-dihydroxy-2-naphthalenecarboxylic acid methyl ester-4-O-alpha-L-rhamnopyranosyl-(1-->6)-beta-D-glucopyranoside (1) was isolated, along with two known compounds: isotaxiresinol 4-O-methyl ether (2) and (R)-7-hydroxy-alpha-dunnione (3). Compound 2 was first obtained from Chirita genus and compound 3 was isolated from this plant for the first time. All structures were elucidated on the basis of spectral and chemical evidence, and the NMR spectroscopic data of compound 2 was published for the first time.
Glucosides ; chemistry ; isolation & purification ; Magnoliopsida ; chemistry ; Molecular Structure ; Naphthalenes ; chemistry ; isolation & purification ; Plant Stems ; chemistry ; Plants, Medicinal ; chemistry

BACKGROUND:Previous studies have confirmed that ethanol can promote adipogenic differentiation of bone marrow mesenchymal stem cells (BMSCs), and up-regulate the expression of PPARγ and aP2 in the tumor necrosis factor α (TNF-α) signaling pathway. As a member of the ZIP protein family, Zrt/Irt-like protein 1 (ZIP1) is closely related to bone metabolism and osteogenic differentiation.OBJECTIVE:To study the effect of BMSCs transfected by ZIP1 on TNF-α signaling pathway in the process of adipogenic differentiation.METHODS:The BMSCs from rabbits were isolated and cultured under different concentrations of alcohol (0.03, 0.09,0.15, 0.21 mol/L), followed by transfection by ZIP1 siRNA and ZIP1 expression vector.RESULTS AND CONCLUSION:After culture in alcohol, the expression levels of aP2 and PPARγ proteins were both significantly increased (P < 0.05), and the level of triglyceride was increased in all alcohol groups except for 0.03 mol/L alcohol group (P < 0.05). After siRNA transfection, the expression levels of aP2 and PPARγ as well as the level of triglyceride were increased significantly in all the alcohol groups (P < 0.05); however, ZIP1 transfection decreased the expression levels of aP2 and PPARγ proteins (P < 0.05). To conclude, ZIP1 siRNA could promote the adipogenic differentiation of BMSCs through the activation of TNF-α signaling pathway.