Recombinant human BMP-2 was compounded with chitosan/gelatin/hydroxyapatite(HCG) scaffold and the complex was sterilized by 60Co radiating. Osteoblast isolated from cranial bones of newborn rat was primary cultured and seeded onto the complexes. 3 days after culturing, scanning electron microscope(SEM) was applied to detect the compatibility of the cell with the complex. SEM showed osteoblast attached closely with the complex and grew well in its pores. Then the complexes with osteoblast modification were implanted into athymic nude mice subcutaneously. 8 weeks after implantation, X-ray photograph and histological observation were applied to detect the bone formation of the complexes. Under X-ray a high-density areas consistent with the shape of the implanted complex could be seen. Histological observation also proved there was bone formation in the interspace of the complex. A conclusion was drawn that rhBMP-2 compounded HCG scaffold had good osteogenesis ability in vivo.

OBJECTIVETo develop a virulent heat-evil-induced thrombosis animal model, and provide a rational animal model for pathogeny and pathogenesis research of thrombosis-related diseases, anti-thrombosis activity screening and pre-clinical studies of CAHT formula.

METHODSD rats were pretreated with carrageenin (Ca) intraperitoneal injection, followed by intravenous injection of endotoxin (LPS from E. coli O111:B4) 50 microg x kg(-1) 16 h later. Thrombosis in rat tails were observed during 12-24 h after injection of LPS. The inflammatory mechanism of this model were investigated by analyzing serum level of TNF-alpha, IL-6, TXB2 and 6-keto-PGF 1alpha, CD11b/CD18 expression of white blood cells (WBC) and P-selectin expression of vessel walls.

RESULTIn LPS/Ca model group, thrombosis can be clearly observed in the distal part of rat tails after 12-24 h of LPS/Ca treatment. High level of TNF-alpha and IL-6 can be measured in serum. The expression of CD11b/CD18 in WBC and P-selectin in vessel endothelium significantly increased and the number of WBC in peripheral blood markedly decreased shortly after LPS/Ca treatment. The adherence of white blood cells to vessel endothelium which can be seen by microscope mainly contributed to the decrease of WBC. The results indicated that there was obvious inflammation after treatment with LPS/Ca, suggesting that inflammation was the key mechanism for this model.

CONCLUSIONThis model was developed through treatment of LPS in combination with Ca, of which LPS is considered to be an exotic virulent heat-evil in TCM, while the inflammatory molecules produced in this model, such as TNF-alpha, IL-6, CD11b/CD18 and P-selectin belong to internal virulent heat-evils, so this animal model consists of pathogeny and pathogenesis of virulent heat-evils. virulent heat-evil.

6-Ketoprostaglandin F1 alpha ; blood ; Animals ; CD11b Antigen ; metabolism ; CD18 Antigens ; metabolism ; Carrageenan ; pharmacology ; Disease Models, Animal ; Endotoxins ; pharmacology ; Immunohistochemistry ; Interleukin-6 ; blood ; Leukocytes ; drug effects ; metabolism ; Male ; Rats ; Rats, Sprague-Dawley ; Thrombosis ; blood ; chemically induced ; metabolism ; pathology ; Tumor Necrosis Factor-alpha ; blood

Tibetan Herbal medicine has its own complete theory based on five sources doctrine. And the theories of "Liuwei", "Baxing" and "Shiqi Gongxiao" formed the basic core components of the property theory of Tibetan medicine. However, books and literature of Tibetan medicine have never been systematically expounded and discussed about it specially which thus will limit the further development of Tibetan medicine theory. In this thesis, we firstly introduced three basic core components of the property theory-the "Liu Wei", "Baxing", and "Shiqi Gongxiao" and their interactions as well. At the same time, the links and similarities between the theory of Tibetan medicine and Chinese medicine theory were compared. The job of the thesis done above is to lay the foundation for further systematic reveal and development of Tibetan medicine theory.
Drugs, Chinese Herbal ; chemistry ; pharmacology ; Humans ; Medicine, East Asian Traditional ; Phytotherapy ; Plants, Medicinal ; chemistry

OBJECTIVETo study use of nasal lining flap in correction of the wide complete unilateral cleft lip.

METHODS78 patients with wide complete cleft lip were. operated, firstly to be sure. That the lip length on both sides was equal. Then the nasal lining flap was used to enhance the height of the lip on cleft side for keeping symmetry with the non-cleft side. The rest of procedures was the same as "Millard" method.

RESULTS84.6 percent of patients had good appearance at one and half years after surgery.

CONCLUSIONSIt is an effective way to take advantage of the nasal lining flap to correct the wide complete unilateral cleft lip.

Cleft Lip ; surgery ; Humans ; Infant ; Male ; Nose ; surgery ; Reconstructive Surgical Procedures ; Surgical Flaps

OBJECTIVETo study whether the anti-apoptotic action is reversed by tetrandrine in a combination with vincristine in human breast carcinoma MCF-7 multidrug-resistant cells.

METHODChromatin condensation was observed by co-staining of fluorescent dyes Hoechst 33342 and propidium iodide; and G1 sub-peak was detected by flow cytometry. Apoptotic cells were detected with TUNEL method. Cellular free ca2+ was determined with Fluo-3 staining method.

RESULTTwo types of chromatin condensation were observed after the sensitive and drug-resistant MCF-7 cells were treated with an antitumor drug vincristine 5 mumol.L-1 for 24 h. The number of cell with chromatin condensation was obviously reduced in the drug-resistant cells treated with the same concentration of vincristine, as compared with the sensitive MCF-7 cells. The number of the apoptotic cells was increased by a combination of non-cytotoxic tetrandrine 20 mumol.L-1 and vincristine in both the sensitive and drug-resistant cells, which was confirmed with fluorescent indication and TUNEL method. The increment of introcellular free Ca2+ level in the cells treated with tetrandrine in a combination of vincristine was detected with Fluo-3 staining method.

CONCLUSIONThe anti-apoptotic action of human breast carcinoma MCF-7 cells can be effectively reversed by tetrandrine.

Alkaloids ; pharmacology ; Antineoplastic Agents, Phytogenic ; pharmacology ; Apoptosis ; drug effects ; Benzylisoquinolines ; Breast Neoplasms ; pathology ; Calcium ; metabolism ; Drug Resistance, Multiple ; Drug Resistance, Neoplasm ; Drug Synergism ; Female ; Humans ; Tumor Cells, Cultured ; Vincristine ; pharmacology

This paper presents a novel monitor which uses ARM controller AT91SAM7S64 as its main processor, LCM (Liquid Crystal Display Module) for displaying ECG waves, SD (Secure Digital memory) card for data storage and RF module PTR8000 for radio data transmission. This portable monitor boasts alarm function for abnormality and can provide dynamic ECG monitoring for patients.
Computer Communication Networks ; Electrocardiography ; instrumentation ; Humans ; Monitoring, Physiologic ; instrumentation ; Signal Processing, Computer-Assisted ; instrumentation ; Telemetry ; instrumentation ; methods

OBJECTIVETo investigate the association between the alleles of human leukocyte antigens (HLA)-DRB1 and essential hypertension (EH) in the Hans living in Yunnan of China.

METHODSThe alleles of HLA-DRB1 were typed by polymerase chain reaction-sequence specific primers (PCR-SSP) technique in samples from 83 patients with essential hypertension and 91 healthy controls. All of the subjects, their grandparents and grand-grandparents are Hans living in Yunnan of China.

RESULTSThe frequency of DRB1*1501/2 in the EH patients (0.219) was significantly higher than that in the controls(0.060), chi quare=18.331, P<0.01. Relative risk (RR) was 4.46, and etiologic factor (EF) was 0.34. The frequency of DRB1*0901 significantly decreased in the group of patients with EH in comparison to the controls (0.081 versus 0.192) chi-square=8.704 P<0.05. RR was 0.41 and prevention factor(PF) was 0.19.

CONCLUSIONHLA-DRB1*1501/2 is associated with the susceptibility to essential hypertension in the Yunnan Hans of China. DRB1*0901 may protect one from the disease.

Adult ; Aged ; Alleles ; China ; ethnology ; Female ; HLA-DR Antigens ; genetics ; HLA-DRB1 Chains ; Humans ; Hypertension ; genetics ; Male ; Middle Aged

OBJECTIVETo study the clinical and pathological features of Alport syndrome in children.

METHODSThe clinical and histopathological data of 10 hospitalized children with Alport syndrome from February 2007 to February 2009 were retrospectively reviewed.

RESULTSThere were 7 males and 3 females, with the age ranging from 2 years to 6 years and 7 months (mean 3 years and 2 months). Five of 10 cases had positive family history. X-linked dominant inheritance Alport syndrome was diagnosed in 8 cases, and autosomal recessive inheritance Alport syndrome in 2 cases. Recurrent gross hematuria was found in 5 cases, hematuria and proteinuria in 3 cases, massive proteinuria in 1 case, and nephritic syndrome in 1 case. Under the light microscope, 8 cases presented with mesangial proliferation glomerulonephritis, and 2 cases with focal segmental glomerulosclerosis. Immunofluorescence assay showed that all cases had IgM deposition in glomerulus. Only 1 case showed typical glomerular basement membrane (GBM) pathological changes. All cases showed abnormal alpha-chain distribution in renal collagen IV.

CONCLUSIONSThe children with Alport syndrome have diverse clinical manifestations. Characteristic histopathological presentations could not be found under a light microscope, mesangial proliferation glomerulonephritis is the dominant pathological change, and IgM deposition in glomerulus is common. The GBM pathological change in children is not common. Immunofluorescence assay of alpha-chain in collagen IV is needed for the diagnosis of Alport syndrome.

Child ; Child, Preschool ; Collagen Type IV ; genetics ; Female ; Humans ; Kidney ; pathology ; Male ; Nephritis, Hereditary ; diagnosis ; genetics ; pathology

OBJECTIVETo investigate the effects of transforming growth factor beta (TGF ) on c-fos gene expression in hepatic stellate cells.

METHODSHepatic stellate cells (HSC-T6) were cultured in the medium containing different concentrations of TGF (0.2, 1, and 5 ng/ml), and cells were collected at different time points of incubation (8, 24, 48, and 72 h). The total RNA of the HSCs was isolated and c-fos gene expression level were measured by reverse transcription polymerase chain reaction.

RESULTSc-fos gene expression levels of HSCs cultured in the presence of low (0.2 ng/ml), moderate (1 ng/ml) and high (5 ng/ml) concentrations of TGF for 8, 24, 48 and 72 h were significantly greater than those of control group. The c-fos gene expression levels of HSCs increased gradually with the increment of TGF concentration, and significant differences in c-fos gene expression were found between the 3TGF groups.

CONCLUSIONTGF strongly up-regulates c-fos gene expression in hepatic stellate cells.

Animals ; Cells, Cultured ; Gene Expression ; drug effects ; Genes, fos ; Hepatic Stellate Cells ; drug effects ; Proto-Oncogene Proteins c-fos ; genetics ; metabolism ; Rats ; Transforming Growth Factor beta ; pharmacology

BACKGROUNDMesenchymal stem cells are a promising cell type for cell transplantation in myocardial infarction. Type I neuregulins-1, also known as heregulin, can promote the survival of cardiomyocytes and stimulate angiogenesis. The purpose of this study was to investigate the expression of heregulin and ErbB receptors in mesenchymal stem cells, then further detect the secretion of heregulin and the changes in expression of heregulin and ErbB receptors under conditions of serum deprivation and hypoxia.

METHODSMesenchymal stem cells isolated from bone marrow of 180 g male Sprague-Dawley rats were cultured. Passage 3 cells were detected experimentally by regular reverse transcriptase-polymerase chain reaction (RT-PCR), quantitative real time PCR and Western blotting.

RESULTSHeregulin and ErbB receptors were expressed in mesenchymal stem cells, and all three ErbB receptors mRNA expressions were significantly down-regulated by serum deprivation and hypoxia, but serum deprivation and hypoxia significantly increased the protein expression of heregulin. Serum deprivation and hypoxia more than 12 hours could induce the secretion of heregulin.

CONCLUSIONSMesenchymal stem cells can express all three ErbB receptors and heregulin. Serum deprivation and hypoxia decrease the mRNA expression of ErbB receptors, increase the expression of heregulin, and activate the secretion of heregulin.

Animals ; Cell Hypoxia ; Cells, Cultured ; Male ; Mesenchymal Stromal Cells ; chemistry ; metabolism ; Neuregulin-1 ; analysis ; genetics ; Oncogene Proteins v-erbB ; analysis ; genetics ; RNA, Messenger ; analysis ; Rats ; Rats, Sprague-Dawley