Objective To investigate the influence of HLA immunogenic mismatching (IM) on acute rejection of renal transplants.Methods The function recovery time of renal allograft and the rate of acute rejection of 196 cases after cadaveric renal transplantation wereanalyzed. Results IM of HLA locus did not influence the function recovery time of the renal allograft. The IM of HLA-A locus did not increase the rate of allograft acute rejection whereas the HLA-B locus did and the HLA-DR increased the acute rejection rate significantly. Conclusion IM should not be ignored in HLA typing. HLA-B locus is related to the allograft acute rejection, while the IM of DR locus increasesthe allograft acute rejection rate significantly.

AIM: To investigate the effect of Dendranthema morifolium (Ramat) Tzvel (DM) on isolated rat heart and ventricular myocytes during ischemia/anoxia and reperfusion/reoxygenation.METHODS: The Langendorff perfused rat hearts were used to measure intraventricular pressure and coronary flow. The cell contraction and intracellular calcium transient in enzymatically isolated ventricular myocytes were determined. RESULTS: (1) DM (0.5 g/L) significantly attenuated the inhibitory effects induced by ischemia/reperfusion on left ventricular developed pressure (LVDP), ?dp/dt max, coronary flow and LVDP?HR, meanwhile increased the content of SOD and decreased the content of MDA in the myocardium; (2) DM (0.5 g/L) attenuated the inhibitory effects of anoxia and reoxygenation on [Ca 2+]i transient and cell contraction in isolated ventricular myocytes. CONCLUSION: DM attenuated the effects on contractility and intracellular calcium induced by ischemia/anoxia and reperfusion/reoxygenation in the isolated rat heart and the ventricular myocytes. The mechanism might be related to increase in SOD activity and maintaining [Ca 2+]i homeostasis.

BACKGROUND: Posterior spinal fusion is a process of bone fusion under special anatomical and biological effects, which affects by many factors. With the development of bone tissue engineering, in vitro constructed tissue engineered bioactive periosteum provides a new approach for solving this problem. OBJECTIVE: To evaluate the effect of in vitro constructed tissue engineered bioactive periosteum in treating lumbar intertransverse process fusion in rabbits. METHODS: In vitro constructed tissue engineered bioactive periosteum was implanted into lumbar intertransverse process of 24 healthy adult New Zealand rabbits. Three different materials were implanted into 3 transverse process gaps (Left L_(4,5,6), Right L_(4,5,6) of each animal. Namely, bone marrow mesenchymal stem cells (BMSCs) combined pig small intestine submucosa (SIS) were implanted into the right L_(4,5) of rabbits in the composite scaffold group; pure SIS was implanted into the right L_(5,6) of rabbits in the pure scaffold group; and autogeneic ilium was implanted into the left L_(5,6) of rabbits in the autogeneic ilium group. All rabbits were sacrificed at 12 weeks after operation to perform gross, imaging and histological observation. RESULTS AND CONCLUSION: The gross observation showed that there had no significant difference between the composite scaffold and autogeneic ilium groups, but the difference was significant compared with the pure scaffold group. lmaging observation showed that the trabeculae was formed in lumbar intertransverse of rabbits in the composite scaffold and autogeneic ilium groups, however, no bone density could be seen in the pure scaffold group. Type I collagen and osteocalcin were strong positive expressed in the composite scaffold group, which had obvious difference to the autogeneic ilium group. No positive expression could be found in the pure scaffold group. It suggested that tissue engineered bioactive periosteum constructed by BMSCs combined with SIS is a well alternative to autogenous graft materials for spinal fusion.

AIM: To investigate the effect of interleukin-2 (IL-2) on the intracellular calcium in electrically stimulated adult rat ventricular myocytes during anoxia and reoxygenation. METHODS: The isolated cardiac ventricular myocytes were exposed to 5 min anoxia followed by 10 min reoxygenation. Chemical anoxia was introduced by Krebs-Henseleit (K-H) solution containing 10 -3 mol/L sodium dithionite. The spectrofluorometric method was used to verify intracellular calcium transient with fura-2/AM as calcium fluorescence probe. RESULTS: It was shown that during anoxia, the amplitude of Ca 2+ transient was decreased, diastolic [Ca 2+ ] i, time to peak and time to relaxation of Ca 2+ transient were increased. All the parameters were got back but did not returned to the pre-anoxia level during reoxygenation. IL-2 at 2?10 5 U/L administrated during anoxia aggravated the effect of rexoxygenation on [Ca 2+ ] i transient. Pretreatment with a specific ? opioid antagonist, nor-BNI (10 -8 mol/L), abolished the effect induced by IL-2 during anoxia on the [Ca 2+ ] i transients, whereas specific ? opioid antagonist, naltrindole (10 -6 mol/L), did not cancel the effect. CONCLUSION: It is concluded that administration of IL-2 during anoxia aggravated the effect of reoxygenation on the [Ca 2+ ] i transients of isolated ventricular myocytes, which was mediated by cardiac ? opioid receptor pathway.

Objectives:To observe the effects of Dantrium and nimodipine on myocardial function in severely burned rabbits. Methods: Full thickness scald burn covering 30% TBSA was produced on rabbits. LVSP, ?dp/dt max ,BPs, BPd, BPm were recorded through a MPA Ⅳ Biological Signal Analysis System before and after burn constantly. All burn animals were resuscitated with lactate Ringer's solution according to the Parkland formula. Dantrium and nimodipine were administered respectively. Results: The myocardial contractility and relaxation were depressed after burn trauma, with a short phase of enhancement immediately after scalding. LVSP,?dp/dt max , BPs and BPm were increased after intravenous injection of Dantrium. The effect of nimodipine was not same as Dantrium. LVSP,?dp/dt max ,were enhanced after infusing nimodipine slowly. Conclusions: The rabbits myocardial function was depressed after severely burn. Dantrium and nimodipine could both improve the myocardial function. Dantrium ○R was suitable for treating the animal with burn shock and myocardial malfunction.

OBJECTIVE To investigate the effect of recombinant human granulocyte colony-stimulating factor(rhG-CSF) combined with antifungal drugs in the treatment of malignant hematologial diseases with fungus infection.METHODS Malignant hematologial patients with fungus infection were randomized to receive fluconazole with or without rhG-CSF.(RESULTS) The response rate in patients who received fluconazole combined with rhG-CSF was 89.1% and in(control) patients was 62.8%(P

Objective To study the effects of the adult T cell leukemia virus type 1(HTLV-1) Tax protein on T lymphocytes self-reactive growth hormone(GH). Methods The expression of the growth hormone protein was measured by Western blot in TaxP and TaxN cells, which expresses HTLV-1 Tax or no. The location of growth hormone in the TaxP and TaxN cells were detected by LSCM(laser scanning confocal microscope). The level of growth hormone mRNA in TaxP and TaxN cells was measured by RT-PCR. The pGL2-GH-luc was transfected in TaxN and TaxP cells by Tfx-50-mediated transfection to assay transcriptional activity. The pNF-κB-luc, pAP-1-luc and pNFAT-luc was transfected into TaxP cells with pcDNA3.0-GH by Tfx50 to test bioactivity of the nuclear transcription factors. Results The mRNA and protein expression of GH could be promoted significantly by Tax. Relative to the TaxN cells, the transcriptional activity of GH was significantly increased about 6.37 times in TaxP cells(P＜0.05). Overexpression of GH can increase the activity of NF-κB about 1.7 times in TaxP cells (P＜0.05). Conclusion GH maybe involve in adult T-cell leukemia(ATL) through activating NF-κB.

Objective To investigate clinical significance of transforming growth factor-beta 1 ( TGF-β1 ) in patients with chronic idiopathic thrombocytopenic purpura(CITP). Methods The serum level of TGF-β1 in 38 pa-tients with initial CITP were detected using enzyme-linked immunosorbent assay(ELISA). Results The serum level of TGF-β1 in initial patients with CITP was significantly higher than that of the controls [( 132.57±5.17) μg/L vs ( 76.81±4.42) μ/L] ( P <0.01 ). The serum level of TGF-β1 in those having good response after therapy was sig-nificantly lower than before treatment[(81.26±3.78)μg/L] (P <0.01 ). There was no difference in TGF-β1 be-tween nonremission [(123.49 ± 4.31 ) μg/L] and initial patients (P > 0.05 ). There was negative correlation between TGF-β1 and platelet count(r = -0. 342 ,P < 0.05 ) ,there was positive correlation between TGF-β1 and megakaryo-cyte count (r = 0.409, P < 0.01 ). Conclusions TGF-β1 partakes in the pathogenesis of CITP, the determination of which in patients with CITP is useful to judge the state of illness, which can be regarded as an assistant index of cur-ative effect.

AIM: To investigate the effects of auricularia auricular polysaccharide (AAP) on chronic cerebral ischemia injury in rats. METHODS: The chronic cerebral ischemia mode1 was made by permanent middle cerebral artery occlusion (MCAO) on the right side. AAP at different doses (50 mg/kg and 100 mg/kg) was intragastrically administered at the onset of ischemia and in the following days after operation, once a day for 4 weeks. After 4 weeks of MCAO, Morris water maze test was introduced to examine the learning and memory functions. Nissl staining was performed to detect the survival neurons in hippocampal slices. Level of malondialdehyde (MDA) and the activity of superoxide dismutase (SOD) in brain tissue were measured. RESULTS: Rats treated with AAP showed a shorter escaping latency in spacial navigation test because the AAP treated rats spent less time to find the platform in spatial probe test. More survival neurons in hippocampal slices were observed from AAP treated rats. Also, the MDA level in brain tissue was reduced and SOD activity in brain tissue was increased in the AAP treated rats with MCAO. CONCLUSION: AAP protects rats from chronic brain ischemic injury, in which its anti-oxidative effect might be involved.

AIM: To investigate the protective effect of auricularia auricular polysaccharide (AAP) on the myocardial injury induced by ischemia and its underlying mechanism. METHODS:AAP was orally administrated to rats at the does of 50, 100 or 200 mg·kg~(-1)·d~(-1) for 20 d. Myocardial injury was induced in anesthetized Sprague - Dawley rats by left anterior descending coronary artery ligation. Myocardial infarct size, the level of lactate dehydrogenase (LDH), the activity of superoxide dismutase (SOD) , the production of lipid peroxidation malondialdehyde (MDA) and protein level of myocardial collagen of the heart were measured. RESULTS: The average myocardial infarct size in AAP groups was significantly smaller than that in ischemia group. The level of serum LDH induced by regional myocardial ischemia was significantly decreased in AAP group compared to ischemia group ( P < 0.01). AAP inhibited the production of MDA and increased the activity of SOD. Furthermore, AAP reduced the protein level of myocardial collagen after ischemia (P < 0.01).CONCLUSION: AAP prevents myocardium from ischemia injury as an antioxidant.