Objective To investigate the effects of autoantibodies (β1-AA) against second extra-cellular loop of the β1-adrenergic receptor (β1-AR-ECⅡ) in sera of patients with dilated cardiomyopathy (DCM) on proliferation of rat CD4+T lymphocytes.Methods β1-AA in the sera of patients with DCM was purified by affinity chromatography .CD4+T lymphocytes were isolated by immunomagnetic microbeads from peripheral blood mononuclear cells of rats and its positive rate was detected by flow cytometry .CCK-8 meth-od was used to detect the proliferation of CD 4+T lymphocytes and flow cytometry was performed to measure the ratio of CD4+/CD8+T lymphocyte .Results The purity of isolated rat CD 4+T lymphocytes by immu-nomagnetic microbeads reached 97.7%.The proliferation of CD4+T lymphocytes stimulated by CD3/CD28 was inhibited by β1-AA in a concentration-dependent manner .However , IgG antibodies extracted from sera of healthy controls did not suppress lymphocyte proliferation (P>0.05).The suppression effect of β1-AA was inhibited after binding to antigenic peptides corresponding to β1-AR-ECⅡ and was completely blocked by metoprolol, a specific antagonist of β1-adrenergic receptor (β1-AR).In addition,β1-AA had no effects on the ratio of CD4+/CD8+T lymphocyte .Conclusion β1-AA isolated from DCM patients suppresses the pro-liferation of CD4+T lymphocytes through β1-AR pathway , which indicates that β1-AA can directly reduce the number of T lymphocytes and impair the function of T lymphocytes , resulting in immune system disorders and the development of DCM .

Objective To investigate the myocardium protective effect of immunoinflammatory response induced by preinfarction angina. Methods Eighty-eight patients of acute myocardial infarction were divided into preinfarction angina group (48 subjects) and sudden onset group (40 subjects). The incidence of severe arrhythmia,heart failure,cardiac shock and in-hospital mortality were assessed in the two groups. The myocardial infarction size,ventricular function,coronary angiography were compared between the two groups. Some immunoinflammatory markers levels were detected. Results In preinfarction angina group,the incidences of severe arrhythmia,heart failure,and in-hospital mortality were lower (P

OBJECTIVE:To study the apoptosis of human leukemic cells induced by Dihydroartemisinin and its molecular mechanism.METHODS:Human leukemia K562 cells were treated by Dihydroartemisinin.The inhibitory effect on cell proliferation was assayed by MTT.Fluorescence microscopy was applied to observe the presence of apoptosis.The expression of caspase-3 was assayed with reverse transcription-polymerase chain reaction(RT-PCR).Levels of mitochondrial and cytoplasmic cytochrome C were determined using Western blot.RESULTS:After treatment with Dihydroartemisinin for 48 hours,the IC50 values of human leukemia K562 cells were 8? 10-5mol? L-1 detected at a wavelength of 570nm by MTT.Distinct morphology changes of cell apoptosis such as karyopyknosis and conglomeration were observed by Hoechst33342/PI staining.RT-PCR assay showed the expression of Caspase-3.Western-blot detection showed the decrease of mitochondrial cytochrome C concentration but the positive expression of cytoplasmic cytochrome C concentration.CONCLUSION:Dihydroartemisinin could inhibit proliferation and induce apoptosis of human leakemic K562 cells,this may partially attributed to the promotion of the delivery of cyt-c and the activation of caspase-3.

The B.subtilis ywtD gene,encoding a ?-polyglutamic acid(?-PGA)depolymerase,was amplified from the genome of B.subtilis NX-2 by PCR.The comparability between the cloned ywtD gene sequence to the reported sequence is high to 99.0%.Only one of the substituted nucleotide base caused the change to the amino acid sequence.The recombinant plasmid pET-15b-ywtD was then transformed into E.coli Rosetta(DE3)and the ywtD gene product could be expressed with the induction of 0.5mmol/L IPTG.The YwtD protein exhibited a remarkable activity in ?-polyglutamic acid degradation.The molecular weight of ?-PGA could be reduced from 700kDa to 20kDa after 72h through the enzymatic hydrolysis and consequently trended to be constant.

Humans ; Lung ; Lung Diseases ; rehabilitation ; Pneumoconiosis ; rehabilitation ; Respiratory Therapy

Cardiovascular Diseases ; Humans ; Risk Factors

In order to improve the sharing of DICOM, a proposal is offered to introduce XML into DICOM on the SPIE 2005 and in this way, better readability and expansibility of DICOM files have been achieved. On this basis, the DICOM data structure is improved further by replacing the one-dimension linear data structure with multilayer tree-shaped data structure. And thus the nesting and dependence relationships between information object and data elements are much clearer and it is more convenient and easy to browse DICOM image files.
Database Management Systems ; Information Storage and Retrieval ; methods ; standards ; Medical Informatics ; methods ; Medical Records Systems, Computerized ; Programming Languages ; Radiology Information Systems ; Software ; User-Computer Interface

OBJECTIVETo observe the effects of Xiaobai Decoction (XBD) in reducing albuminuria and shortening the duration of albuminuria in patients with pregnancy-induced hypertension syndrome (PIH) in puerperium.

METHODSEighty-five patients were given the conventional treatment with magnesium sulfate for relieving convulsion and lowering hypertension, at the same time, the treated group was given XBD additionally with the modification according to the symptoms. The treatment course for both groups was 14 days. Routine test of midstream urine was performed every three days, and 24 h-urinary protein was measured every week.

RESULTSThe therapeutic effect on the 43 patients of the treated group was markedly effective in 11 (25.6 % ), effective in 26 (60.4%) and ineffective in 6 cases (14.0%), the total effective rate being 86.0%; while in the 42 patients of the control group, the corresponding numbers were 5 (11.9%), 21 (50.0%), 16 (38.1%) and 61.9%, respectively, the efficacy of the former was significantly better (P < 0.05).

CONCLUSIONXBD is a simple, safe and effective drug for reducing albuminuria and shortening the duration of albuminuria in puerperium of PIH patients.

Adult ; Albuminuria ; drug therapy ; Drugs, Chinese Herbal ; therapeutic use ; Female ; Humans ; Hypertension, Pregnancy-Induced ; drug therapy ; Phytotherapy ; Postpartum Period ; Pregnancy ; Treatment Outcome ; Young Adult

Objective To construct multiple myeloma mucin MUC1-2VNTR gene eukaryotic expressing vector,which provided the basic material for further study of multiple myeloma DNA vaccine.Methods MUC1-2VNTR coding gene as target gene,and a KOZAK sequence was inserted before it.Hind Ⅲ and Xba Ⅰ restriction enzyme site were inserted on both ends.Then the whole sequence was synthesized and cloned into pcDNA3.1/myc-his B vector,and the recombinant vector was identified by restriction enzyme digestion and DNA sequencing.Results Synthesized MUC1-2VNTR gene was 140 bp.Restriction enzyme digestion and DNA sequencing confirmed pcDNA3.1/MUC1-2VNTR/myc-his B including the whole exact translation frame region and MUC1-2VNTR gene.Condnsion The pcDNA3.1/MUC1-2VNTR/myc-his B has been successfully constructed,which provides the basic material for further studies of MUC1 mucin function and multiple myloma DNA vaccine.

AIM: To design a simple and effective auxiliary device for detection of the compound action poten-tial (CAP) and the force on the isolated sciatic nerve and gastrocnemius in toads, and to investigate its practicability. METHODS: A simple “L” shape device (L tube), which was composed of a nerve chamber and an organ bath, was made for fixing the isolated sciatic nerve and gastrocnemius.After fixing, the sciatic CAP and the gastrocnemius force were detected by BL-420S data acquisition and analysis system.The specimens were radomly divided into control group, and the lidocaine nerve and muscle groups.The sciatic nerve or gastrocnemius of each lidocaine group was firstly treated with the corresponding concentration of lidocaine, and then washed out with Ringer’s solution, and its reversible anesthetic action on nerve conduction and muscle force was analyzed to verify the practicability of the L tube device.RESULTS: The CAP and the force of the sciatic-gastrocnemius specimens were detected concurrently by fixing the specimens in the L tube, and the liquid in the nerve chamber and organ bath was changed easily.Compared with the control, lidocaine at 0.05 and 0.2 g/L significantly increased the sciatic threshold stimulus voltage and maximal stimulus voltage (P <0.05), prolonged the absolute refractory period (P <0.01), and slowed down the conduction velocity (P <0.01).Lidocaine at 1 g/L complete-
ly blocked the sciatic conduction.The rest tension of the gastrocnemius was increased, and the maximal twitch force was decreased significantly by 1 g/L lidocaine (P <0.01), but the threshold and maximal stimulus voltage did not show statis-tic difference.The parameters of the sicatic nerve and gastrocnemius completely or partially recovered to the control level after washing out.CONCLUSION: As an auxiliary device, L tube makes the detection of CAP and force on the isolated sciatic nerve and gastrocnemius in toads more conveniently.