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Objective To detect the correlation between the periodontal bone loss and carotid calcifications by using MSCT.Methods Imaging materials of 270 patients who were suspected atherosclerosis and underwent MSCT were retrospectively studied.According to the score of carotid calcification,the patients were divided into three groups:slight calcification group (carotid calcification score <100),severe calcification group (carotid calcification score ≥100),and normal control group (carotid calcification score=0).The original images were post-processed with volume rendering(VR),multi planar reformation(MPR),curved planar reformation(CPR)and maximum intensity projection (MIP)by using EBW4.5 workstation,and then the residual teeth number and the periodontal bone loss teeth were recorded in different groups.Results On MSCT,the carotid calcification score and the number of periodontal bone loss were displayed clearly.The number of the periodontal bone loss teeth in the calcification groups were significantly higher than those in the normal control group(P<0.01).Furthermore,the number of the periodontal bone loss teeth was positively correlated with the severity of carotid calcification.Conclusion The periodontal bone loss is highly correlated with the severity of the carotid calcification.The volume reconstruction technique of MSCT is a non-invasive diagnostic testing to detect the periodontal desease and to quantify carotid calcifications.
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BACKGROUND:Hyperbaric oxygen therapy can improve the microenvironment of the injured spinal cord, and hyperbaric oxygen combined with Schwann cel transplantation is expected to improve the therapeutic efficacy on spinal cord injury. OBJECTIVE:To investigate the effect of Schwann cel transplantation plus hyperbaric oxygen on the neural functional recovery of rats with spinal cord injury. METHODS:A total of 80 female SD rats with spinal cord injury were randomized into 4 groups, with 20 in each group:blank control group, injection of L-DMEM via the tail vein at 6 hours after modeling;cel transplantation group, injection of 3×106 RESULTS AND CONCLUSION:The motor function of the lower limbs was better in the combination group than the cel transplantation and hyperbaric oxygen groups, as wel as better in the cel transplantation group and Schwann cel suspension via the tail vein at 6 hours after modeling;hyperbaric oxygen group, hyperbaric oxygen therapy at 1 hour after modeling;combination group, combined therapy of Schwann cel transplantation and hyperbaric oxygen. Inclined plane test, modified Tarlov score, Basso-Beattie-Bresnahan score for motor function evaluation of rat hind limbs were performed and measured at 1, 3 days, 1, 2, 3, 4 weeks after treatment. SRY gene expression in the spinal cord was measured at 4 weeks after transplantation using PCR method. Horseradish peroxidase tracer and electroneurophysiology detection was done at 8 weeks after transplantation.hyperbaric oxygen groups than the blank control group. SRY expression was detected in the cel transplantation group and combination group, but not in the blank control group and hyperbaric oxygen group. The number of nerve fibers positive for horseradish peroxidase was higher in the combination group than the cel transplantation and hyperbaric oxygen groups fol owed by the blank control group, and there were significant differences between different groups (P<0.01). In addition, the latencies and amplitudes of somatosensory evoked potential and motor evoked potential in the combination group were also better than those in the other groups (P<0.05 or P<0.01). These findings indicate that the combined therapy of Schwann cel transplantation and hyperbaric oxygen can promote the synaptic regeneration, improve limb motor function and electrophysiological function in rats with spinal cord injury, which is superior to hyperbaric oxygen or Schwann cel transplantation alone.
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To study the regulating effect of Astragalus Polysaccharides ( APS) to the mice infected by Brucella suis S2.Methods:120 BALB/c mice were randomly divided into 4 groups:experimental mice were injected APS 1 ml ( 0.4,1.2,3 mg/ml) via peritoneal cavity respectively once a day and the control group was injected with the same volume of saline for 3 days,then infected with Brucella suis S2 1 ml (1×107 L-1 ) by ip.Five mice of each group were killed through eye bloodletting at 1,6,12,24,48, 72 h respectively post-infection with Brucella suis S 2 and the peritoneal macrophage were obtained respectively to make smear.Phagocytic rate and phagocytic index were calculated by the Wright Giemsa staining after infected 1 h.TNF-α,IL-12 and IFN-γlevels of serum at different time points were measured by ELISA.The bacterial load of MΦand spleen were measured by coating method.Results:The phagocytic rate and phagocytic index of MΦin APS 3 dose groups were higher than those of the control group ( P<0.05 ).The microbial load of MΦin APS 3 dose groups at 1 h infected by Brucella suis S 2 were significantly higher than those of control,but significantly lower than those of control at 6,12,24,48,72 h after infected by Brucella suis S2.The microbial load of spleen in APS 3 dose groups at 6 h infected by Brucella suis S 2 were significantly higher than those of control ,but significantly lower than those of control at 12,24,48,72h after infected by Brucella suis S2.The concentrations of TNF-α,IL-12 and IFN-γin the serum of APS groups had significantly been improved ( P<0.05 ).Conclusion: APS can promote the activation of MΦin vivo and strengthen the activity of phagocytosis and killing to Brucella suis S 2.APS can promote the secretion of TNF-α,IL-12 and IFN-γof mice,strengthen the cellular immune response of mice to Brucella suis S 2.
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The mechanism of decreasing platelet aggregation by fish oil rich in n-3 fatty acids was studied in rabbits and rats. These animals were randomly divided into four groups. In rats, group Ⅰ was fed a basal diet; group Ⅱ was fed a high fat diet containing 7.5% lard, 0.25% bile salts, 0.5% cholesterol, group Ⅲ and Ⅳ received the diet with 5% lard, 0.25% bile salts,0.5% cholesterol and 0.5 ml fish oil or 0.5ml olive oil respectively. In rabbits, group Ⅰ was fed a basal diet; group Ⅱ received 20g diets containing 10.4% lard, 2.5% cholesterol, then, some basal diet; group Ⅲ and Ⅳ received 20g diets with 4.2% lard, 2.5% cholesterol and 2 ml fish oil or olive oil respectively, then, some basal diet. Fish oil contained 20% EPA and 50% DHAThree months later, plasma TXB2/6KPGF1? ratios were 1.4, 2.2, 1.0, 1.7. Plasma TXB2, cholesterol, serotonin, calcium, fibrinogen and blood viscosity were significantly lowered in group Ⅲ as compared with group Ⅱ. Platelet cAMP was greatly increased in group Ⅲ than that in group Ⅱ n-3 fatty acids in platelet, plasma and tissues such as liver and heart were definitively higher in group Ⅲ.These experiments showed that fish oil inhibited platelet aggregation and thrombosis formation as a consequence of changing the fatty acids composition in tissue membrane and decreasing TXA2/PGI2 ratio which may stimulate platelat cAMP synthesis and then decrease some agglutinating factors such as serotonin and calcium etc, released from platelet. On the other hand fish oil lowered blood cholesterol, which may change blood cell membrane fluidity, lowered blood fibrinogen and viscosity, so the situation of blood platelet and its surroundings could be improved.
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In this experiment, we investigated with enzymological methods the mechanisms of increase in serum high density lipoprotein cholesterol (HDL-C) in rats fed with concentrated fish oil. The rats were fed with high fat diet (Group 1), high fat plus olive oil (Group 2) and high fat plus concentrated fish oil (Group 3) for 6 weeks respectively. The concentrated fish oil contained about 26% methyl-eicosapentaenoate (EPA-M) and 52% me-thyl-docosahexaenoate (DHA-M), and was given in 0.5ml/day for each animalThe results showed that HDL-C levels in the serum of rats fed with fish oil were markedly higher than Group 1 and 2 (p
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The therapeutic effects of Chinese mushroom on hyperlipidemia in male adults were investigated. The subjects taking mushroom tablet (10g/day) were divided into ordinary diet (n = 18) group and hypernutritive diet (n = 16) group. After 3-month treatment, the mean values of serum total cholesterol and triglyceride were significantly decreased by 59.5 (P
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For observation of the therapeutic effect of some foods on hyperlipi-demia in men, study was perfomed with subjects of hyperlipidemia by using mushroom, soya bean meat, beans, garlic, spring onions, prawn, chives, walnut seeds, peanut seeds, fishes etc. After 3 months treatment, the average values of serum total cholesterol and triglyceride were decreased significantly. The percentage of serum high-density lipoprotein cholesterol in the total cholesterol was increased from 24.7% to 31.3%; the percentage of serum low-density lipoprotein cholesterol was decreased from 61.8% to 49.2%. The curative rates of subjects with hypercholesterolemia were 93.3%, and the subjects with hypertriglyceridemia were only 50.0% and 57.1%. The effective rates were 79-87%.
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The effects of fish oil rich in eicosapentaenoic acid (C20:5?-3; EPA) and docosahexaenoic acid (C22:6?-3; DHA) on serum total cholesterol (TC) and high density lipoprotein cholesterol (HDL-C) levels were investigated in experimental hypercholesterolemic rats. The fish oil contained about 15% EPA and 43% DHA. Each animal was given 1ml fish oil/day by intragastric feeding for 30 days. The results in twice experiments showed that TC concentration in the serum of rats fed fish oil was markedly decreased as compared to rats fed olive oil, but serum HDL-C elevated. Furthermore, the ratio of HDL-C to TC in the serum was also significantly elevated in rats fed fish oil.