AIMTo observe the effect of LPC on the pacemaker current I(f) in ischemic myocardium and if the effect could be reversed by ISO.

METHODSBy using two microelectrode voltage clamp technique to measure and compare the amplitude of I(f) of ischemic myocardium in the presence of LPC and LPC add ISO.

RESULTSIschemia decreased the amplitude of I(f) at all membrane potential levels. Adding LPC 2 x 10(-5) mol/L to the ischemia-like solution, the amplitude of I(f) decreased further (n = 5, P < 0.05), it means that LPC aggravated the inhibitory effect of "ischemia" on the pacemaker activity. Adding LPC 2 x 10(-5) mol/L and ISO 1 x 10(-6) mol/L together to the ischemia-like solution, the amplitude of I(f) increased significantly at membrane potential -90 mV to - 120 mV (n = 8, P < 0.05) compared with ischemia condition, but still did not reach the levels before ischemia.

CONCLUSIONIn acute myocardial ischemia condition, toxic metabolite LPC accentuated its inhibitory effect on pacemaker current I(f), a local release and accumulation of catecholamine could not completely reverse their inhibitory effect.

Animals ; Isoproterenol ; metabolism ; Lysophosphatidylcholines ; pharmacology ; Membrane Potentials ; drug effects ; Microelectrodes ; Myocardial Ischemia ; metabolism ; physiopathology ; Myocardium ; Patch-Clamp Techniques ; Sheep

Adenocarcinoma ; metabolism ; pathology ; Adenocarcinoma, Mucinous ; metabolism ; pathology ; Adenocarcinoma, Papillary ; metabolism ; pathology ; Carcinoma, Signet Ring Cell ; metabolism ; pathology ; Follow-Up Studies ; Gene Expression Regulation, Neoplastic ; Humans ; Lymphatic Metastasis ; Neoplasm Invasiveness ; Organic Cation Transport Proteins ; biosynthesis ; genetics ; Organic Cation Transporter 2 ; Osteopontin ; Prognosis ; RNA, Messenger ; biosynthesis ; genetics ; Sialoglycoproteins ; biosynthesis ; genetics ; Stomach Neoplasms ; metabolism ; pathology ; Survival Rate

Objective To investigate the effects of 3 different ventilation methods,including conventional mechanical ventilation (CMV),high frequency oscillatory ventilation(HFOV) and partial liquid ventilation (PLV),on the changes of inflammatory factors and pulmonary surfactant associated protein A (SP-A) in bronchoalveolar lavage fluid (BALF) in newborn piglets with acute lung injury(ALI).Methods Twenty-four newborn piglets,no more than 3 days old,were enrolled.After ALI made with saline lavage(38 ℃,35 mL/kg),newborn piglets were randomly assigned to 4 groups:control group (n =6,no ventilation),CMV group(n =6),HFOV group(n =6),and PLV group(n =6).Piglets were sacrificed after being ventilated for 24 h.Tumor necrosis factor-α (TNF-α),interleukin-8 (IL-8),interleukin-1 (IL-1) and SP-A in BALF were measured quantitatively by using enzyme-linked immunosorbent assay.Results In 3 groups using different ventilation methods,the population mean of TNF-o,IL-8,IL-1 and SP-A were statistically different (all P =0.000).SP-A in PLV group and HFOV group were higher than that in CMV group (all P ＜ 0.05),while IL-8,IL-1 and TNF-α in PLV group were lower than those in CMV group (all P ＜ 0.05),IL-8 and TNF-α in PLV group were lower than those in HFOV group (all P ＜ 0.05),IL-8 and TNF-α in HFOV group were lower than those in CMV group (all P ＜ 0.05).Conclusions Pulmonary inflammatory reaction was different in 3 ventilation groups.Compared with CMV and HFOV,PLV attenuated inflammatory reaction,so it could increase the expression of SP-A and decrease the degradation of SP-A.

The chemical investigation on Ganoderma philippii led to the isolation of sixteen compounds by silica gel and Sephadex LH-20 column chromatography. On the basis of spectroscopic data analyses, their structures were elucidated as 2, 5-dihydroxyacetophenone (1), methyl gentisate (2), (S) -dimethyl malate (3), muurola-4, 10 (14) -dien-11beta-ol (4), dihydroepicubenol (5), 5-hydroxymethylfuran carboxaldehyde (6), ergosta-7, 22E-dien-3beta-ol (7), ergosta-7, 22E-dien-3-one (8), ergosta-7, 22E-diene-2beta, 3alpha, 9alpha-triol (9), 6/beta-methoxyergo-sta-7, 22E-dien-3beta, 5alpha-diol (10), ergosta-4, 6, 8(14), 22E-tetraen-3-one (11), ergosta4, 6, 8-(14), 22E-etetraen-3beta-ol (12), 5alpha, 8alpha-epidioxy-ergosta-6, 22E-dien-3beta-ol (13), 7alpha-methoxy-5alpha, 6alpha-epoxyergosta-8-(14), 22E-dien-3beta-ol (14), ergosta-8, 22E-diene-3beta, 5alpha, 6beta, 7alpha-tetraol (15), and ergosta-5, 23-dien-3beta-ol, acetate (16). All the compounds were obtained from this fungus for the first time, and compounds 4 and 5 were isolated from the Ganoderma genus for the first time.
Ganoderma ; chemistry ; Medicine, Chinese Traditional ; Organic Chemicals ; analysis ; isolation & purification

Adult ; Aged ; Bone Transplantation ; adverse effects ; Female ; Follow-Up Studies ; Humans ; Ilium ; surgery ; Male ; Middle Aged ; Postoperative Complications ; pathology ; prevention & control ; therapy

OBJECTIVETo assess the diagnostic value of the simplified gonadorelin stimulation test for precocious puberty.

METHODSTwo hundred and ninety-two girls with signs of advanced breast development received the gonadorelin stimulation test. According to the result of gonadorelin stimulation test, the girls were divided into 3 groups: 151 with central precocious puberty (CPP),119 with premature thelarche (PT) and 22 with peripheral precocious puberty (PPP).

RESULTSLH or FSH levels at 15 min, 30 min, 60 min in PPP group were not significantly different (P>0.05). Those were significantly different in PT group (P<0.01). The highest levels of LH were at 30 min and the highest levels of FSH were at 60 min. LH or FSH levels at 15 min, 30 min, 60 min in CPP group were significantly different (P<0.01) with the highest levels at 30 min. The ratio of basal LH and FSH >0.2 had a diagnostic sensitivity of 48.3 % and specificity of 69.7%. Taking the LH/FSH ratio >0.9 at 15 min, 30 min, 60 min as cut-off value, the diagnostic sensitivity was 80.1%, 68.9% and 38.4%, and the specificity was 90.8%, 96.6% and 69.7%, respectively.

CONCLUSIONThe LH/FSH ratio>0.9 at 15 min after gonadorelin stimulation test can be used as a cut-off value to differentiate CPP from PT and blood sample at 60 min were not necessary.

Child ; Female ; Follicle Stimulating Hormone ; blood ; Gonadotropin-Releasing Hormone ; Gonadotropins ; blood ; Humans ; Luteinizing Hormone ; blood ; Predictive Value of Tests ; Puberty, Precocious ; diagnosis ; Sensitivity and Specificity

OBJECTIVETo study the correlation between thrombolysis in myocardial infarction (TIMI) risk stratification and blood stasis syndrome (BSS) score in patients with unstable angina pectoris (UAP), and to analyze the relation of BBS degree and UAP clinical outcomes.

METHODSCollected were general data, demographic data, risk factors, Chinese medical symptoms and syndromes, coronary artery angiography results, relevant physical and chemical examinations from 114 UAP inpatients. Gensini score, TIMI risk score, and BSS score of these patients were calculated.

RESULTSThe BBS score and Gensini score were significantly positively correlated (r = 0.78, P < 0.01). The BBS score was significantly higher in those with lesion in three branches than those with lesion in one branch or in two branches (P < 0.05). The BBS score was significantly higher in the high risk group than in the lower risk group and the medium risk group (P < 0.01). The TIMI risk score was obviously higher in the severe blood stasis group than in the moderate blood stasis group and the mild blood stasis group (P < 0. 05, P < 0.01). The BBS score and TIMI risk score was positively correlated (r = 0.23, P < 0.05).

CONCLUSIONThe BBS score was positively correlated with more coronary arteries involved. The more severe BBS degree, the TIMI risk score more higher, and the BBS degree more syndrome.

Aged ; Angina, Unstable ; diagnosis ; Female ; Humans ; Male ; Medicine, Chinese Traditional ; methods ; Middle Aged ; Risk Assessment

AIMTo observe the intracellular calcium ion spatio-temporal and dynamic changes in the hippocampal neuronal culture model of epilepsy induced by low magnesium ion medium, and to explore the relationship between calcium ion and epilepsy.

METHODSApplying both laser scanning confocal microscope and patch clamp to timely observe the changes of [Ca2+]i and electrophysiological in the hippocampal neuronal culture model of epilepsy, and the influence of NMDA receptor-gated channels retarder and non-NMDA receptor-gated channels retarder.

RESULTSAfter the hippocampal nerve cell broken into epileptiform discharges, [(Ca2+]i rapidly ascended to (620 +/- 70) nmol/L, NMIDA acceptor retarder (MK-801, 10 micromol/L) and non-NMDA acceptor retarder (NBQX, 10 micromol/L) reduced [Ca2+]i ascendance. Recovery of the elevated [Ca2+]i was obviously delay, after 90 min and 150 min epileptiform discharges, it took (114.8 +/- 5.2) min and (135.0 +/- 22.7) min (P < 0.05) respectively.

CONCLUSIONIn vitro status epilepticus causes sustained elevation of intracellular calcium levels in hippocampal neurons

Animals ; Animals, Newborn ; Calcium ; metabolism ; Cells, Cultured ; Hippocampus ; cytology ; metabolism ; Neurons ; metabolism ; Rats ; Rats, Sprague-Dawley ; Status Epilepticus ; metabolism ; physiopathology

Actins ; analysis ; Animals ; Cell Division ; drug effects ; Cells, Cultured ; Collagen Type I ; analysis ; Estradiol ; pharmacology ; Liver ; cytology ; drug effects ; Liver Cirrhosis ; etiology ; Male ; Rats ; Rats, Wistar

A new UPLC method was developed for the simultaneous determination of eleven characteristic flavonoid glycosides in Ginkgo biloba leaves. The natural occurrence of flavonoid glycosides in Ginkgo biloba leaves within one vegetative season was investigated for the first time. The analysis was performed on an Agilent ZORBAX Eclipse Plus C18 column (50 mm x 4.6 mm, 1.8 microm), the mobile phase A was acetonitrile, the mobile phase B was 0.4% phosphate aqueous solution in a gradient elution at a flow rate of 0.6 mL x min(-1), the detection was carried out at 360 nm. The result showed that eleven flavonoid glycosides had good linearity with good average recovery, separately. The method was proved to be accurate, rapid and good reproducible for the quality evaluation of Ginkgo biloba leaves, and provide an easy and rapid means for the quantitative analysis of flavonoid glycosides and their content fluctuation with seasons.
Chromatography, High Pressure Liquid ; methods ; Drugs, Chinese Herbal ; analysis ; chemistry ; Flavonoids ; analysis ; chemistry ; Ginkgo biloba ; chemistry ; Glycosides ; analysis ; chemistry ; Molecular Structure ; Plant Leaves ; chemistry ; Plants, Medicinal ; chemistry ; Quality Control ; Reproducibility of Results ; Seasons