Laser techniques are widely applied in medical research and military affairs. The characters of laser make it the best way to evoke pain.Pain induced by laser stimuli is influenced by laser parameters such as wavelength, pulse duration and stimulus area in addition to the properties of skin such as the distance from the brain, type and color of skin. In this review,both laser evoked pain and factors influencing it are discussed.

Objective:To analyze the role of preoperative circulating tumor cell(CTC) and circulating tumor vascular endothelial cells (CTEC) in the diagnosis of gastric cancer and its correlation with the clinicopathological characteristics of gastric cancer.Methods:Sixty-two gastric cancer patients and 11 patients of benign gastric diseases were enrolled. Subtraction enrichment (SE) and immunofluorescence staining-chromosome fluorescence in situ hybridization (i·FISH) were used to integrate the unique SE-i ·FISH technology platform detecting patients′ CTC and CTEC.Results:The number of CTC in the gastric cancer group was significantly higher than that in the control group ( t=2.693, P=0.009); the number of CTEC in the gastric cancer group was higher than the control group ( t=2.015, P=0.048). With the cut-off value being set at 9 cells/6 ml in blood, the sensitivity of CTC in the diagnosis of gastric cancer is 84%, and the specificity is 82% (AUC=0.876, 95% CI, 0.792-0.963, P<0.01); When set at 6 cells/6 ml, the sensitivity of CTEC in the diagnosis of gastric cancer is 50%, and the specificity is 100%(AUC=0.727, 95% CI, 0.603-0.851, P=0.02). CTC positive is closely related to tumor location(χ 2=4.292, P=0.038 ) and TNM stage(CTC≥10, χ 2=4.848, P=0.028; CTC≥11, χ 2=6.234, P=0.013). CTEC positive is closely related to serum CA19-9(χ 2=4.858, P=0.028) and serum CA724 (χ 2=4.108, P=0.043 ) . Conclusion:SE-i·FISH technology has high sensitivity and specificity in the detection of CTC and CTEC of gastric cancer.

Objective To examine the clinical manifestations and pulmonary radiological features in patients with triphosgene poisoning.Methods Clinical manifestations,laboratory tests and CT scans were analyzed retrospectively in 17 patients with triphosgene poisoning.We focused on the severity,development and repair of pulmonary impairment.Results Plain film and CT scans in five mild cases demonstrated bilateral scattered pulmonary patchy shadows.Of 12 cases with moderate to severe diseases,three showed bilateral multiple pulmonary patchy shadows and nodules with confluence of part of the lesions on plain film and CT scans;bilateral lungs were involved in nine cases with imaging findings of bilateral disseminated pulmonary round or ovary nodules with different size,ill-defined and partly-confluent patchy shadows and thickening of both interlobular septum and the wall of bronchus.Of clinical interests,imaging findings were closely correlated with clinical course and laboratory results.Conclusion Radiological examinations with plain films and CT scans could reveal the severity,evolvement of pulmonary edema in patients with triphosgene poisoning,and these are of clinical benefit in the early management and prognostic evaluation of patients with triphosgene poisoning.

OBJECTIVETo investigate the role of cytoplasmic domain of integrin alpha IIb in platelet signal transduction.

METHODSBinding capacity of integrin alpha IIb(R995A) to antibody platelet activation complex-1 (PAC-1) and pp125 focal adhesion kinase (FAK) phosphorylation of cells were detected by flow cytometry, immune precipitation, and Western blotting.

RESULTSWithout activation, wild-type alpha IIb beta3 Chinese hamster ovary (CHO) cells failed to bind to PAC-1, but mutant chimera alpha IIb(R995A)beta3 CHO cells were able to bind with PAC-1. Furthermore, phosphorylation of pp125 (FAK) in wild-type alpha IIb beta3 CHO cells occured only when cells were adhered to fibrinogen, but could not be detected in bovine serum albumin suspension. However in the mutant chimera group, it could be detected in both conditions.

CONCLUSIONThe mutation in integrin alpha IIb(R995A) alters its affinity state as a receptor, thus also mediating cytoplasmic signal transduction leading to the phosphorylation of pp125 (FAK) without ligand binding.

Animals ; Blood Platelets ; metabolism ; CHO Cells ; Cell Adhesion ; Cricetinae ; Cricetulus ; Cytoplasm ; metabolism ; Dual Specificity Phosphatase 2 ; Focal Adhesion Kinase 1 ; Focal Adhesion Protein-Tyrosine Kinases ; Humans ; Phosphorylation ; Platelet Glycoprotein GPIIb-IIIa Complex ; genetics ; metabolism ; physiology ; Point Mutation ; Protein Phosphatase 2 ; Protein Tyrosine Phosphatases ; metabolism ; Protein-Tyrosine Kinases ; metabolism ; Signal Transduction ; Transfection

OBJECTIVETo investigate the oxidative damage to lung tissue and peripherial blood in PM2.5-treated rats.

METHODSPM2.5 samples were collected using an auto-sampling instrument in summer and winter. Treated samples were endotracheally instilled into rats. Activity of reduced glutathione peroxidase (GSH-Px) and concentration of malondialdehyde (MDA) were used as oxidative damage biomarkers of lung tissue and peripheral blood detected with the biochemical method. DNA migration length (microm) and rate of tail were used as DNA damage biomarkers of lung tissue and peripheral blood detected with the biochemical method.

RESULTSThe activity of GSH-Px and the concentration of MDA in lung tissue significantly decreased after exposure to PM2.5 for 7-14 days. In peripheral blood, the concentration of MDA decreased, but the activity of GSH-Px increased 7 and 14 days after experiments. The two indicators had a dose-effect relation and similar changing tendency in lung tissue and peripheral blood. The DNA migration length (microm) and rate of tail in lung tissue and peripheral blood significantly increased 7 and 14 days after exposure to PM2.5. The two indicators had a dose-effect relation and similar changing tendency in lung tissue and peripheral blood.

CONCLUSIONPM2.5 has a definite oxidative effect on lung tissue and peripheral blood. The activity of GSH-Px and the concentration of MDA are valuable biomarkers of oxidative lung tissue damage induced by PM2.5. The DNA migration length (microm) and rate of tail are simple and valuable biomarkers of PM2.5-induced DNA damage in lung tissues and peripheral blood. The degree of DNA damage in peripheral blood can predict the degree of DNA damage in lung tissue.

Animals ; DNA Damage ; drug effects ; Drug Administration Routes ; Drug Administration Schedule ; Lung ; drug effects ; pathology ; Lung Diseases ; blood ; chemically induced ; pathology ; Male ; Oxidative Stress ; Particle Size ; Particulate Matter ; administration & dosage ; toxicity ; Rats ; Rats, Wistar ; Seasons

OBJECTIVETo study the effect of dendritic cells (DC) co-cultured with cytokine induced killer (CIK) cells on cytotoxicity against K562 and K562 drug-resistant (K562/ADM) cells.

METHODSPeripheral blood mononuclear cells (MNC) isolated from healthy adult donors were induced to obtain CIK cells and DC respectively and then these two kinds of cells were co-cultured. The cytotoxicity of the co-cultured cells against K562 and K562/ADM cells was measured with MTT assay.

RESULTSThe cytotoxicity CIK cells alone to K562 and K562/ADM cells was (20.0 +/- 1.2)% - (61.1 +/- 2.2)% and (17.5 +/- 2.1)% - (45.2 +/- 3.3)% respectively at low effector to target ratios (2.5 - 20.0). This effect was significantly enhanced by co-culturing with DCs being (25.2 +/- 2.3)% - (70.9 +/- 4.1)% and (22.4 +/- 2.7)% - (62.3 +/- 5.0)%.

CONCLUSIONCIK cells showed high cytotoxicity against K562 and K562/ADM cells and the activity could be enhanced by co-culturing with DC.

Cell Proliferation ; Cells, Cultured ; Coculture Techniques ; Cytokine-Induced Killer Cells ; cytology ; immunology ; Cytotoxicity, Immunologic ; Dendritic Cells ; cytology ; immunology ; Humans ; Immunophenotyping ; K562 Cells

OBJECTIVE: To investigate the relationship among 3 polymorphisms of GP IIb and the function of GP IIb T13959 G in the platelet transfusion refractoriness(PTR). METHODS: The 26th exon, the 30th exon and the 21st intron of gene GP IIb in 110 individuals were amplified by polymerase chain reaction (PCR), and the PCR products were analyzed with single-strand conformation polymorphism(SSCP) and sequenced to investigate whether there was linkage among the polymorphisms of the gene. Human platelet antigen-3 (HPA-3) gene frequency was detected by Fok I enzyme in 147 patients with hematologic diseases, and was compared with that in 110 normal individuals. Forty-four patients who received apheresis platelet transfusion repeatedly were randomly divided into the HPA-3 homotype group and the control group. The antibodies of the platelet were detected after 3 times of platelet transfusion. RESULTS: There were polymorphisms of gene GP IIb in the 26th, 30th exon and the 21st intron, and the mutations were: T changed into G in 13,959 th of the 26th exon; C changed into T in 16,997 th of the 30th exon; the 9 bps deletion occurred in 11,996-12,004 th of the 21st intron. The 3 polymorphisms had synchronization in the individuals. The results of Fok I enzyme indicated that the frequency of HPA-3a was 83.6% (92/110)and 81.9%(119/147), and that of HPA-3b was 16.4%(18/110) and 19.1%(28/147) in the normal individuals and the patients respectively. There was no significant difference between the patients and normal individuals (P>0.05). After the platelet transfusion, the antibodies of all the cases of the homotype platelet transfusion were negative, but the antibodies in 2 cases of the control group were positive, and there was antibody to HPA-3a in one of the antibodies positive cases. CONCLUSION (1)There is close linkage among the polymorphisms of gene GP IIb, which is T->G in 13 959 th of the 26th exon, C->T in 16,997 th of the 30th exon, and the 9 bps deletion in 11,996-12,004 th in the 21st intron. (2)The gene frequency of HPA-3a/3b is similar in the normal individuals and patients with hematologic diseases. (3) HPA-3 system may be one of the reasons for PTR in Chinese.
Adolescent ; Adult ; Aged ; Antigens, Human Platelet ; immunology ; physiology ; Asian Continental Ancestry Group ; genetics ; Case-Control Studies ; Child ; Exons ; Female ; Gene Frequency ; Genotype ; Humans ; Immune Tolerance ; Introns ; Male ; Middle Aged ; Platelet Membrane Glycoprotein IIb ; genetics ; immunology ; Platelet Transfusion ; Polymorphism, Single-Stranded Conformational ; Young Adult

OBJECTIVETo observe the serum B-type natriuretic peptide (BNP) changes post acute myocardial infarction (AMI).

METHODSThe serum BNP level was determined in 230 consecutive patients with AMI admitted to CCU and in 111 normal cases from October 2002 to October 2003 in Fuwai Hospital. The 230 AMI patients were further divided into various subgroups according to first or recurrent AMI, ST elevations myocardial infarction (STEMI) or non-ST elevations myocardial infarction (NSTEMI) group, infarction location, coronary arteries involved, infarction related arteries (IRA), TIMI blood flow of IRA and primary PCI or not. Serum BNP, CK-MB, TnT and heart function were analyzed.

RESULTSThe serum BNP level was significantly increased in patients with AMI (553.7 +/- 735.1) ng/L than that in normal subjects [(26.4 +/- 27.4) ng/L, P < 0.05]. LVEF was significantly lower, and LVEDd, BNP and LnBNP were all significantly higher in the first time AMI group compared to recurrent AMI group (all P < 0.001). The BNP level were significantly higher in AMI patients with single or triple coronary arteries stenosis than those without coronary stenosis (P < 0.05), in TIMI blood flow 0 - 1 and 2 groups than in TIMI 3 group (all P < 0.001). The CK-MB and TnT were significantly increased while BNP significantly decreased in the patients underwent primary PCI group compared with patients did not receive PCI therapy (all P < 0.05 - 0.001).

CONCLUSIONSerum BNP was significantly elevated in patients after AMI but decreased after successful primary PCI in patients with AMI.

Adult ; Aged ; Aged, 80 and over ; Angioplasty, Balloon, Coronary ; Female ; Humans ; Male ; Middle Aged ; Myocardial Infarction ; blood ; therapy ; Myocardium ; enzymology ; Natriuretic Peptide, Brain ; blood ; Troponin I ; blood ; Troponin T ; blood

OBJECTIVETo study the growth and differentiation of adult canine autologous skeletal myoblasts after being transplanted into acute myocardial infarction (AMI) region by intramyocardium injection (IMI) and intracoronary infusion (ICI).

METHODSAutologous skeletal myoblasts were procured by a modified method. AMI model of adult canine was obtained through left anterior descending branch ligation and was divided into 4 groups (n = 5 for each group). Autologous skeletal myoblasts (1.0 - 1.4 x 10(8) cells) were injected locally into AMI region or infused into infarction-related coronary artery. Specimens were harvested 4 weeks after cellular transplantation for histological study including HE, PTH, immunochemical stain and transmission electronmicroscope.

RESULTSIn both two transplantation groups, newborn muscle-derived cells, striated muscle tissue and mature skeletal myofibril were demonstrated existing in MI region by electronmicroscope, PTH stain or anti-skeletal myosin heavy chain (slow) immunochemical stain, respectively. Newborn striated muscle tissues arranged in order of consistency with host myocardial fibers in two treatment groups. Newborn striated muscle tissue was more inclined to gather in MI region in the local injection group but distracted from each other in the intracoronary infusion group.

CONCLUSIONAutologous skeletal myoblasts appears to live and differentiate into mature striated muscle tissue after transplanting into AMI region by IMI or ICI routes.

Animals ; Cell Transplantation ; methods ; Cells, Cultured ; Dogs ; Female ; Male ; Myoblasts, Skeletal ; cytology ; transplantation ; Myocardial Infarction ; surgery ; Transplantation, Autologous

OBJECTIVETo compare the effects of intracoronary transplantation of autologous bone marrow mononuclear cells (BM-MNC) or peripheral endothelial progenitor cells (EPC) in mini-swine model of myocardial ischemia-reperfusion.

METHODSThe Mini-swine acute myocardial infarction and reperfusion model was created with 90 min occlusion of the left anterior descending coronary artery followed by reperfusion and the animals were then divided into BM-MNC group (3.54 x 10(8) +/- 0.90 x 10(8), n = 9), EPC group (1.16 x 10(7) +/- 1.07 x 10(7), n = 7) and control group (saline, n = 7). Echocardiography, hemodynamic measurements and myocardium infarction size were evaluated before and 4 weeks after intracoronary cell transplantations.

RESULTSThe net decrease from baseline to 4 weeks after transplantation of left ventricular ejection fraction (LVEF), left ventricular end systolic pressure, cardiac output and +dp/dt(max) were significantly attenuated post BM-MNC and EPC therapy compared to control group (all P < 0.05) and were similar between BM-MNC and EPC groups. Transplantation of BM-MNC and EPC also significantly decreased myocardial infarction size compared to control group.

CONCLUSIONAutologous intracoronary transplantation of BM-MNC or EPC in this model equally improved cardiac systolic function and reduced infarction area.

Animals ; Bone Marrow Cells ; cytology ; Bone Marrow Transplantation ; Coronary Circulation ; Disease Models, Animal ; Endothelial Cells ; cytology ; Female ; Male ; Myocardial Reperfusion Injury ; therapy ; Stem Cells ; cytology ; Swine ; Swine, Miniature ; Transplantation, Autologous