Clinical observation of tachycardia-induced cardiomyopathy after radiofrequency cather ablation / 实用医学杂志

Objective To determine the baseline echocardiographic characteristics and the time course and degree of recovery of left ventricular (LV) systolic dysfunction in patients with tachycardia-induced cardiomyopathy ( TCM ) . Methods Seven hundred and fifteen patients received radiofrequency cather ablation ( RFCA ) for tachycardiarrhymias from July 2010 to July 2013 were screened in this study. Only 33 patients with reduced left ventricular ejection fraction (LVEF) (LVEF<50% and improved≥15%) were diagnosed with tachycardia-induced cardiomyopathy and were included in the study. Patients with early improvement (over 25%increase in LVEF at 1-week follow-up compared to the baseline ) were enrolled in the improved group , and the rest patients were enrolled in the improved group. All Patients received transthoracic echocardiography for LV size and function detection at 1 week and at 3,6,12 months follow-up. Results The average baseline of the LV end-diastolic diameter, and the LVEF were (55 ± 10.7)mm and (38 ± 4.6)%, repectively. Early improvement ( over 25%increase in LVEF at 1-week follow-up compared to the baseline ) in the improved group was observed in 16 patients. Patients with early improvement had higher LVEF at 12-month follow-up compared to the patients without early improvement [(69.2± 4.2)% vs (58.1 ± 6.9)%, P < 0.001]. Conclusions RFCA is proved to be a relatively safe and effecient treatment method. Atrial fibrillation related to TCM , rhythm control is superior to the rate control. The early improvement in LVEF may potentially predict the complete reversibility of LV systolic dysfunction.

Structures and bioactivity of polysaccharides from isatidis radix / 中国中药杂志

<p><b>OBJECTIVE</b>To investigated the chemical structures and bioactivity of polysaccharides from Isatidis Radix.</p><p><b>METHOD</b>Polysaccharides were extracted and purified by column chromatograph and their chemical structures were identified by UV, IR, NMR, periodic acid oxadation and Smith degradation method and their stimulation effects to macrophage were evaluated by using MTT method.</p><p><b>RESULT</b>Five polysaccharides, polysaccharide A , B, C, D and E were gotten and their molecular weights were 2 000, 1 757.1, 1 34 2.7, 955.6, 11.7 kDa, respectively. Polysaccharide A was composed of arabinose, polysaccharide E was composed of arabinose and galactose, polysaccharides B, C, D were composed of glucose and 1 --> 2, 1 --> 3, 1 --> 4, 1 --> 6 linkages existed in polysaccharides A-E, of A, B, C, D, E were alpha-configurations. Polysaccharides B, C and D showed better bioactivity than polysaccharides A and E with stimulation index (SI) of 5.31, 4.76, 5.17.</p><p><b>CONCLUSION</b>Five polysaccharides are seperated firstly from Isatidis Radix.</p>

Calcium channel mechanism by which betaine promotes proliferation of lymphocytes in mice / 中国中药杂志

<p><b>OBJECTIVE</b>To study how the way in which betaine promotes the proliferation of mouse spleen lymphocytes is related to calcium channels.</p><p><b>METHOD</b>BALB/c mice were used for this experiment. Mouse spleen lymphocytes were obtained through in vitro cultivation after they had been separated, and were divided into a negative control group, a Con A group, and 0.04, 0.4, 4, and 20 mmol x L(-1) betaine groups. MTT was used to observe the effect of betaine on the proliferation of mouse spleen lymphocytes; flow cytometry was used to measure the changes in the cell cycle of mouse spleen lymphocytes; and laser confocal scanning microscopy was used to observe the changes in the intracellular [Ca2+]i of mouse spleen lymphocytes after betaine or different calcium channel blockers were applied.</p><p><b>RESULT</b>Betaine was found to promote the proliferation of mouse spleen lymphocytes 12 h after it had been applied in vitro in concentrations of 4 and 20 mmol x L(-1). It was also found to promote the proliferation of mouse spleen lymphocytes 24 h and 48 h after it had been applied in vitro in concentrations of 0.04, 0.4, 4, and 20 mmol x L(-1), with the effect being most marked for the 4 mmol x L(-1) group 24 h after its application. It was found to facilitate the entry of mouse spleen lymphocytes from the G0/G1 to the S phase 4, 6, 18, and 24 h after it had been applied to mouse spleen lymphocytes in a concentration of 4 mmol x L(-1), with the effect being most marked at 18 h after its application. Intracellular [Ca2+]i in mouse spleen lymphocytes increased significantly (P < 0.01) 6, 12, 18 h after 4 mmol x L(-1) betaine had acted on the lymphocytes, with the effect being most marked at 6 h. The calcium channel blockers nifidipine, diltiazem, mibefradil, and genistein had no effect on the increase of the intracellular [Ca2+]i in mouse spleen lymphocytes due to the application of betaine, while verapamil, mycifradin, heparin, and procaine could block such increase.</p><p><b>CONCLUSION</b>Betaine facilitates the entry of mouse spleen lymphocytes from the G0/G1 into the S phase by raising the intracellular [Ca2+]i in these cells, thus promoting their proliferation. Intracellular [Ca2+]i increases mainly in two ways: (1) By affecting the alpha1 subunit of the L-type voltage-gated calcium channel with mediation by G proteins and thus leading to an efflux of intracellular calcium: (2) By affecting the IP3R and RyR calcium channels of the intracellular calcium stores and thus leading to the release of intracellular calcium.</p>

Study on Chemical Constituents Extracted with Ethanol from Radix Isatidis / 中国药房

OBJECTIVE:To isolate the chemical constituents from Radix isatidis.METHODS:The 95% ethanol extract of Radix Isatidis underwent adsorption by silica gel,and the portion eluted by different solvents was isolated and purified on silica gel column repeatedly.The physico-chemical constants and spectral data of the obtained compounds were determined and their chemical structure was identified.RESULTS:6 compounds were separated from chloroform and n-Butanol parts of Radix Isatidis and identified as:cholesterol(Ⅰ),indigotin(Ⅱ),indirubin(Ⅲ),p-Hydroxybenzaldehyde(Ⅳ),salicylic acid(Ⅴ),lariciresinol-4,4'-2-O-?-D-glucopyranoside(Ⅵ),respectively.CONCLUSION:For the first time,compound(Ⅰ)and compound(Ⅳ)were isolated from Radix Isatidis,this finding serves as reference.

Screening of the Antiviral Active Parts from Isatis indigotica / 中国药房

OBJECTIVE:To study the activity of 10 chemical parts extracted from Isatis indigotica against herpes simplex virus(HSV)in vitro and to determine the antiviral active parts.METHODS:10 crude fractions and refined portions were extracted from Isatis indigotica using solvent isolation and absorption chromatography.Their inhibitory effects against HSV-Ⅰ and HSV-Ⅱ were determined by MTT using virus inhibition ratio and therapeutic index(TI)as appraisal targets to compare the antiviral effects among all the chemical parts.RESULTS:The parts(Ⅷ,Ⅹ)with EtOH(10% and 50% in concentration)elution via macroporous resin absorption showed the most potent activities,whose inhibitory rates against HSV-Ⅰ were 53.21% and 56.28% respectively,similar the action of its positive control acyclovir(62.55%),and their TI were 4.61 and 18.62 respectively.CONCLUSION:There were significant differences in the antiviral activity among all the chemical parts extracted from Isatis indigotica,

Antitumor effect of betaine and its influence on glycometabolism of S_(180) bearing mice / 中草药

Objective To study the antitumor activity of betaine and its effect on the glycometabolism of S_(180) bearing mice. Methods On the basis of S_(180) bearing mice, taking tumor inhibition rate, the activity of LDH and ALD in serum as indexes which were determined by test kits. Results The different dosages for tumor inhibition rate of betaine are 39.8%, 25.7%, and 17.7%, respectively, betaine of high dosage can remarkably decrease the activity of LDH, and ALD (P

Studies on Water-soluble Chemical Constitutions in Radix Isatidis / 中国药房

OBJECTIVE:To extract and separate the water-soluble chemical constitutions from Radix Isatidis.METH ODS:The Radix Isatidis water extract underwent adsorption by D 101 macroporous resin,the portion eluted by ethanol of different concentrations was isolated and purified on silica gel column repeatedly,the physicochemical constants and the spectra data of the compound obtained were determined and its chemical constitutions were identified.RESULTS:3compounds temporarily separated from Radix Isatidis water extract,were identified as:syringin(Ⅰ),indole—3—acetonitrile—6—O—?—D—glucopyranoside(Ⅱ)and(+)—isolariciresinol(Ⅲ),respectively.CONCLUSION:For the first time,compound(Ⅰ)and compound(Ⅱ)were isolated from Radix Isatidis.