Objective To investigate the effect of escharectomy on rats' pulmonary NF-?B activation and the expression of pulmonary proinflammatory cytokines in early stage of burn injury.Method Wistar rats were randomly divided into three groups:group A(control group),group B(postburn without escharectomy),group C(escharectomy at early stage of burn injury).Thermal-injuried rats underwent 35% TBSA full-thickness burns. Activation of pulmonary NF-?B at 12 hours and 24 hours postburn was tested by electrophoretic mobility shift assay (EMSA),and at the same time expressions of pulmonary TNF-?mRNA were measured by reverse transcription polymerase chain reaction(RT-PCR)and release of pulmonary TNF-?were assayed by enzyme-linked immunosorbent assay(ELISA).Results Compared with control group,activity of pulmonary NF-?B in group B was markedly increased,reached(19.56?1.36)?10~4 A at 12 hours and(15.23?1.94)?10~4 A at 24 hours,which was higher than that in group A[(4.36?0.38)?10~4 A,P

ObjectiveTo observe the effect of comprehensive rehabilitation on shoulder subluxation of patients with stroke hemiplegia.MethodsComprehensive rehabilitation was practiced on 20 hemiplegic post-stroke patients with shoulder subluxation, including putting injured limb at correct position, keeping the range of passive motion, resistance exercise of scapula muscle group, and shoulder sting. The therapeutic effect was evaluated after 6 weeks treatment.ResultsThere was a significant difference in the shoulder subluxation and movement function of the upper extremities between pre-therapy and after therapy ( P<0.05～0.01).ConclusionComprehensive rehabilitation has obvious therapeutic effect on shoulder subluxation and motor dysfunction of patients with stroke hemiplegia.

OBJECTIVETo investigate the elastic limit and relevant enclasp force of the non-precious metal casting clasp.

METHODSCasting clasp samples of five cobalt-chromium alloys and one 18 - 8 nickel-chromium alloy were made from prefabricated clasp wax by invesing, casting, sandblasting, and ultrasonic cleaning. The process of casting clasp samples deflected by loading and returned by unloading was tested and electric signals were collected by an omnipotent material machine. The analog electric signal was converted to digital signal by an analog to digital converter and stored in a computer. The elastic limit and the relevant enclasp force were analyzed using a relative software.

RESULTSThe elastic limit and the relevant enclasp force of the casting clasp made from the 18 - 8 nickel-chromium alloy were smallest and those of the clasps made from the cobalt-chromium alloys in various brands were different. The range of the elastic limit of the cobalt-chromium alloy casting clasp with the length of 5.0 mm in undercut was 0.28 mm-0.33 mm and the relevant enclasp force was 14.42 g-19.28 g.

CONCLUSIONSIn clinic, we should select the suitable undercut deepness wherein the cobalt-chromium alloy casting clasps, according to different brands of the casting alloy, undercut length, undercut slope, and the clasp thickness.

Chromium Alloys ; Cobalt ; Dental Alloys ; Dental Clasps ; Dental Stress Analysis ; Denture, Partial, Removable ; Elasticity ; Humans ; Nickel ; chemistry ; Stress, Mechanical

OBJECTIVETo investigate the effect of nuclear factor-kappaB (NF-kappaB) activation on the expression of proinflammatory cytokines in the lung tissues of rats with early-stage burn injury.

METHODSWistar rats were randomly divided into 3 groups, namely the normal control, burn, burn and PDTC treatment groups, and in the latter two groups, the rats were subjected to 35% TBSA full-thickness burns. Activation of pulmonary NF-kappaB at 1, 3, 6, 12, and 24 postburn hour (PBH) was tested by electrophoretic mobility shift assay , and the expressions of pulmonary tumor necrosis factor alpha (TNF alpha) and interleukin-8 (IL-8) mRNAs at 3, 6, 12, and 24 h were detected by RT-PCR.

RESULTSCompared to that of the control group, activity of pulmonary NF-kappaB in burned rats was markedly increased within 1 PBH and kept increasing till 24 h. Expressions of pulmonary TNF alpha and IL-8 mRNAs increased gradually, reaching the peak level at 6 PBH, and PDTC could effectively inhibit pulmonary NF-kappaB activation and expression of the pulmonary cytokines induced by the burn injury.

CONCLUSIONSevere burn injury may activate pulmonary NF-kappaB, which ultimately leads to secretion of cytokines in the lung tissues.

Animals ; Burns ; immunology ; pathology ; Disease Models, Animal ; Gene Expression ; Humans ; Inflammation Mediators ; immunology ; Interleukin-8 ; genetics ; immunology ; Lung ; immunology ; pathology ; NF-kappa B ; genetics ; immunology ; Random Allocation ; Rats ; Rats, Wistar ; Tumor Necrosis Factor-alpha ; genetics ; immunology

OBJECTIVESTo study the possible relationship between CYP1A1, NAT2 genetic polymorphisms and the susceptibility of prostate cancer.

METHODSForty-eight patients with prostate cancer and 112 healthy cases were selected as the control randomly. NAT2 and CYP1A1 gene polymorphisms were analysed with the methods of PCR-RFLP, ASA and real-time fluorescence Light-Cycler. The difference of frequency between the patients and the controls was compared.

RESULTSAmong prostate cancer patients and their matched controls, the frequencies of alleles and genotypes were significantly different with Ile-Val gene Polymorphisms (P < 0.05), in which the frequency of the allele G and GG genotypes were significantly higher than those in their matched controls with an odds ratio of 1.59 and 3.06(P < 0.05), respectively; No significant differences of the frequencies of the MspI alleles and genotypes were found between the patients with prostate cancer and the matched controls(P > 0.05). No significant differences of NAT2 slow acetylator genotype frequency were found between the controls and prostate cancer patients (P > 0.05).

CONCLUSIONSThe CYP1A1 Ile-Val gene polymorphisms might be associated with the occurrence of prostate cancer, while MspI gene polymorphisms and NAT2 slow acetylator genotype might not be associated with the occurrence of prostate cancer.

Adult ; Aged ; Arylamine N-Acetyltransferase ; genetics ; Cytochrome P-450 CYP1A1 ; genetics ; Genetic Predisposition to Disease ; Humans ; Male ; Middle Aged ; Polymorphism, Genetic ; Prostatic Neoplasms ; genetics

OBJECTIVETo investigate the effects of burn serum on nuclear translocation of monocytic NF-kappaB heterodimers p50/p65 and the degradation of inhibiting kappaB (IkappaBalpha), so as to further explore the role of burn serum on the activation of monocytes.

METHODSPeripheral blood monocytes (PBMCs) isolated from healthy volunteers were employed as the target cells. The cells were stimulated by the serum from healthy volunteers and burn patients, and by burn serum together with pyrrolidine dithiocarbamate (PDTC). Sera from normal healthy volunteers were taken as control. The nuclear translocation of monocytic p50 and p65 at 30th, 60th, 120th and 480th post stimulation minutes (PSM) was observed with laser confocal microscopy. The degradation of monocytic IkappaBalpha protein at 30th, 60th, 90th and 120th PSM was determined by Western blot.

RESULTSCompared to that in control group, the nuclear translocation of monocytic p50 and p65 took place 30 min after the PBMCs were stimulated by burn serum, peaking at 30 to 60 min, but it gradually recovered to pre-stimulation state at 2 hrs with decreased intra-nuclear collection. Meanwhile, the IkappaBalpha degradation occurred within 30 min after PBMCs being stimulated by burn serum, and it peaked at 60 mins. However, IkappaBalpha gradually reappeared in the cytoplasm after 2 hrs of stimulation. PDTC (an antioxidants) could effectively inhibit monocytic IkappaBalpha degradation and nuclear translocation of NF-kappaB induced by burn serum.

CONCLUSIONBurn serum could induce nuclear translocation of p50 and p65 components of NF-kappaB in monocytes into the nucleus and degradation of IkappaBalpha, leading ultimately to the secretion of cytokines from the PBMCs.

Active Transport, Cell Nucleus ; Burns ; blood ; Cells, Cultured ; Female ; Humans ; I-kappa B Proteins ; metabolism ; Male ; Monocytes ; metabolism ; NF-KappaB Inhibitor alpha ; NF-kappa B p50 Subunit ; metabolism ; Transcription Factor RelA ; metabolism

Objective　To evaluate the prophylactic-therapeutic role of escharectomy during early postburn stage on internal organ dysfunction. Methods　A total of 72 Wistar rats were randomized into 3 groups: burn without escharectomy group (A group), burn with escharectomy during early postburn stage (B group) and normal control. Vascular permeability were measured with 99Tc-labelled albumin. Furthermore, the effect of burn sera on permeability of monolayer of vascular endothelial cell (EC) was observed. Results　Vascular permeability in group B was significantly lower than in group A. When exposed to burn sera, EC monolayer permeability in group B is decreased when compared with group A. Conclusion　Escharectomy during early postburn stage could restore endothelial permeability

Objective To establish a quantitative RT-PCR method with self-quenched fluorogenic probe for detection of bcr/abl mRNA in patients with chronic myeloid leukemia for providing a useful tool for diagnosis of CML,evaluation of therapeutic effect and monitoring of minimal residual disease(MRD). Methods bcr/abl gene from cultured K562 cells was amplified by conventional RT-PCR.The standard quantitative plasmid was constructed by A-T clone method.The self-quenched fluorogenic quantitative RT- PCR method(FQ-RT-PCR)for determination of bcr/abl mRNA was established successfully using the ABI PRISM 7000 PCR Detector.The linear range,sensitivity,stability,and repetitiveness of the method were determined.The marrow samples from 25 CML patients and 3 ALL patients were assessed.Results The sensitivity of the FQ-RT-PCR was 10 copies/?l recombined plasmid,and bcr/abl mRNA can be detected from 1 K562 cell in 10~5 normal cells.The linear range was 10~2-10~9 copies/?l recombined plasmid.The coefficient variation(CV)value was 2.1% in intra-assay and 6.1% in inter-assay.The median ber/abl mRNA expression level was 4.50?10~4 copies/?g RNA [(0.45-89.00)?10~4],5.45?10~4 copies/?g RNA [(2.95-19.30)?10~4 ],13.00?10~4 copies/?g RNA [(4.10-89.00)?10~4] and 2.35?10~4 copies/?g RNA [(0.45-5.12)?10~4] in 25 CML patients,11 patients in the incipient chronic phase,6 patients in blastic crisis,8 patients in chronic period after treatment,respectively.The bcr/abl mRNA level in blastic crisis was significantly higher than that in chronic phase(q= 3.41,P

OBJECTIVETo investigate the effect of NF-kappaB activation on the early expression of proinflammatory cytokines in myocardium and early myocardial dysfunction in burn rats.

METHODSOne hundred and seventy Wistar rats were enrolled in the study and randomly divided into three groups, i. e. control( C, n = 20, with isotonic saline solution) , burn ( B, n = 90, with isotonic solution after burns) and pyrrolidine dithiocarbamate (PDTC, n =60, with isotonic saline and 250 mg/kg PDTC after burns) groups. The rats in B and PDTC groups were inflicted with 35% TBSA full-thickness burns on the back. The activity of myocardial NF-kappaB was determined by electrophoretic mobility shift assay at 1 , 3, 6, 12,24 postburn hours (PBH), with expression of integral absorbance ( A ) value . The expression of myocardial tumor necrosis factor alpha ( TNF-alpha) mRNA was assessed by reverse transcription polymerase chain reaction( RT-PCR) and in situ hybridization at 6, 12 PBH, with expression ofA value. The left ventricular systolic pressure( LVSP) , the left ventricular end diastolic pressure (LVEDP) ,the maximum rate of rise of left ventricular pressure ( +/- dp/dt max) were also observed at 3, 6, 12,24 PBH. RESULTS The activity of myocardial NF-KB in B group was markedly increased at 1 PBH [ (20. 3+/-3. 4) x 104A ] ,which was obviously higher than that in C group (2. 2 +/- 0. 4) x 104A , P <0.01]. It peaked at 3 PBH, and was still evidently higher than that in C group at 24 PBH ( P <0. 01). The expression of TNF-alpha mRNA was obviously higher than that in C group at 3 PBH ( P < 0. 01) , peaking at 6 PBH, and it was mainly expressed in myocardium. The expression of LVSP and +/- dp/dt max were lower, but LVEDP was higher than that in C group during 3 -24 PBH ( P <0.01).

Animals ; Burns ; metabolism ; pathology ; Disease Models, Animal ; Male ; Myocardium ; metabolism ; pathology ; NF-kappa B ; metabolism ; Rats ; Rats, Wistar ; Tumor Necrosis Factor-alpha ; metabolism

OBJECTIVETo explore the role of nuclear factor-kappaB (NF-kappaB) in the burn serum induced expression of intercellular adhesion molecules-1 (ICAM-1) in endothelial cells.

METHODSHuman umbilical vein endothelial cells (HUVECs) were cultured in vitro and divided into control (with normal serum stimulation), burn serum (B, with burn serum stimulation) and PDTC (with burn serum and PDTC stimulation) groups. The NF-kappaB activity in endothelial cells was determined with electrophoretic mobility shift assay (EMSA) at 0.5, 1.0, 2.0, 4.0 post-stimulation hour (PSH). The expression of ICAM-1 at 3.0, 6.0, 12. 0, 24.0 PSH was detected by flow cytometry.

RESULTSThe NF-kappaB activity in endothelial cells in burn serum group and PDTC group were markedly higher than that in control group (P <0.01), and it reached the peak at 1.0 PSH [(21.03 +/- 4.87), (7.44 +/- 0.60) x 10(4) A], respectively, then gradually decreased. But it was obviously lower in PDTC group than that in burn serum group ( P <0. 01 ). The expression of ICAM-1 was gradually increased in both burn serum group and PDTC group, reaching the peak level at 12.0 PSH [(327 +/- 37), (142 +/- 31) mean fluorescence intensity], respectively, which were significantly higher than that in control group (P <0.01). But it was evidently lower in PDTC group than that in burn serum group at 12.0 and 24.0 PSH (P <0.01).

CONCLUSIONBurn serum can initiate the synthesis and release of adhesion molecules in endothelial cells through activation of NF-kappaB, indicating that NF-kappaB plays an important role in the process of burn serum induced endothelial secretion of adhesion molecules.

Adolescent ; Adult ; Burns ; blood ; metabolism ; Cells, Cultured ; Endothelial Cells ; metabolism ; Endothelium, Vascular ; cytology ; Female ; Humans ; Intercellular Adhesion Molecule-1 ; metabolism ; Male ; Middle Aged ; Muscle, Smooth, Vascular ; cytology ; NF-kappa B ; metabolism ; Serum ; metabolism ; Umbilical Veins ; cytology