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Middle-aged women experienced foreign body sensation in both eyes without obvious causes for many days. The clinician tried to diagnose the patient according to her physical and laboratory examinations. After detecting worm bodies in the patient′s eye, and examining the worms with a microscope, the diagnosis of conjunctival sucking nematodes was confirmed. After targeted treatment, the patient′s symptoms improved significantly.
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Objective@#Investigate osteogenic differentiation of canine periodontal ligament stem cells ( cPDLSCs) via over-expression ephrinB2 in cPDLSCs．@*Methods @# cPDLSCs were isolated from the premolars and molars of Beagle．After transfected with EfnB2-GFP-Bsd and GFP-Bsd empty Vector，cPDLSCs were induced to osteogenic differentiation．Western blot was used to invest the expression of ephrinB2 protein．The effect of osteogenic differentiation of EfnB2-cPDLSCs and Vector-cPDLSCs were analyzed by RT-PCR , CCK-8，Alizarin-red S staining and ALP. @*Results@#There was no significant difference in cell proliferation between EfnB2-cPDLSCs and Vector-cPDLSCs．While EfnB2-cPDLSCs displayed an enhanced ALP activity and more prominent mineralized nodules compared with Vector-cPDLSCs．The odonto-/ osteogenic genes in EfnB2-cPDLSCs were also highly enhanced．@*Conclusion@#The results of our study indicated that ephrinB2 gene-transfected cPDLSCs showed enhanced osteogenic differentiation.
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Objective:To observe the expression characteristics of small ubiquitin-like modified protein (SUMO) pathway members in osteosarcomaby using molecular biology methods, and provide theoretical basis for targeted therapy based on protein SUMO modification.Methods:Eighteen fresh osteosarcoma tissue samples surgically resected at Tianjin Cancer Hospital from January 2017 to June 2019 were collected. Western blot and immunohistochemical methods were used to detect the protein expressions of SUMO1, SAE1, Ubc9, and SENP1, which are core members of SUMO pathway, in the cancerous and adjacent tissue. Taking osteosarcoma cell line 143B as the research object, three targeted treatment regimens were designed and grouped as follows: control group, nonsense group, siR-SUMO1 group, siR-Ubc9 group, and SENP1 group. Western blot was used to verify the efficiency of gene transfection, the positive expression rate of EdU was detected by cell proliferation detection kit, the ability of cell migration and invasion was measured by scratch test and Transwell invasion test, and the apoptosis rate was detected by flow cytometry. Bone marrow mesenchymal stem cells (BMSCs) were used to evaluate the side effects of three treatment regimens.Results:Results from Western blot and immunohistochemistry showed that the protein expression levels of SUMO1, SAE1, andUbc9 in osteosarcoma tissues were significantly higher than those in adjacent tissues ( P<0.05), but SENP1 was significantly lower than in adjacent tissues. The experimental results based on 143B osteosarcoma cells showed that the siR-SUMO1 group, siR-Ubc9 group, and SENP1 group can significantly inhibit the activation of SUMO pathway in osteosarcoma cells, showing lower tumor cell proliferation ( P<0.05), slower cell migration and invasion capacity ( P<0.05), and higher apoptotic rate ( P<0.05), than the control group and nonsense group; however, experimental results based on BMSCs showed that the siR-SUMO1 group and siR-Ubc9 group can significantly inhibit the proliferation of BMSCs, induce apoptosis, and show great therapeutic side effects, but the SENP1 group has almost no effect on the proliferation and apoptosis of BMSCs ( P>0.05). Conclusion:The SUMO pathway is abnormally activated in osteosarcoma. Exogenous supplementation or endogenous activation of SENP1 is one of the alternatives for targeted osteosarcoma treatment.
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Objective:To observe the changes in bone mineral density and microstructure parameters in sclerostin (SOST) gene knockout (SOST -/-) mice after ovariectomy. Methods:Twelve 4-week-old SOST knockout mice were randomly divided into two groups ( n=6): ovariectomized group (SOV), sham operated group (SSO). Twelve wild-type mice were randomly divided into two groups ( n=6): wild-type ovariectomized group (WTO), wild-type sham operated group (WTS). Twelve weeks later, mice were sacrificed and one lumbar vertebra of each mouse was selected for micro-CT analysis. The bone mineral density, trabecular volume fraction, trabecular number and trabecular thickness were observed and compared in the 4 groups. Results:There was no difference in bone mineral density, trabecular volume fraction, trabecular number and trabecular thickness between SOV and SSO groups. Bone mineral density, trabecular volume fraction, trabecular number and trabecular thickness in SOV and SSO groups were significantly higher than those in WTO and WTS groups ( P<0.001). Bone mineral density, trabecular volume fraction and trabecular number in WTO group were significantly lower than those in WTS group ( P=0.017, 0.039, 0.021, respectively). There was no difference in trabecular thickness between WTO and WTS groups. Conclusions:Sclerostin knockout mice showed high bone mass, and ovariectomy did not lead to bone loss and bone microstructure degeneration, which indicates that slerostin is a potential therapeutic target for postmenopausal osteoporosis.
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Objective@#To investigate the effect of sevoflurane anesthesia on hepatic ischemia-reperfusion injury in patients undergoing partial hepatectomy.@*Methods@#A total of 86 patients undergoing partial hepatectomy were divided into sevoflurane group and isoflurane group according to random number table with 43 patients in each group. Both groups received continuous epidural block combined with general anesthesia, sevoflurane group took sevoflurane combined with remifentanil to maintain anesthesia, while isoflurane group took isoflurane remifentanil to maintain anesthesia. The mean arterial pressure (MAP) and heart rate(HR) of different moments, awakening (open-eye time, extubation time, listening to instruction time, orientation recovery time, time of Aldrete score up to 9 minutes), the serum levels of tumor necrosis factor alpha (TNF-α), interleukin 1 (IL-1), aspartate aminotransferase (AST), alanine aminotransferase (ALT), glutamate dehydrogenase (GLDH), alpha glutathione S transferase (α-GST) levels at different moments were compared between the two groups.@*Results@#The MAP and HR at T1, T2, T3 and T4 in both groups were significantly lower than those at T0 (P<0.05). The HR at T1 and T4 in sevoflurane group were significantly higher than those in isoflurane group (P<0.05). The open-eye time, extubation time, listening to instruction time, orientation recovery time in sevoflurane group were significantly shorter than the isoflurane group (P<0.05). The levels of serum TNF-α, IL-1, AST, ALT, GLDH and α-GST in the two groups at T2 and T3 were significantly higher than those at T0 (P<0.05), and began to fall back to T4. The levels of serum TNF-α, IL-1, AST, ALT, GLDH and α-GST in the sevoflurane group at T2 and T3 were significantly lower than those in the isoflurane group (P<0.05).@*Conclusions@#The hepatic hemodynamics in patients undergoing partial hepatectomy with sevoflurane is more stable better than isoflurane during operation, which has faster postoperative recovery and relieved hepatic ischemia-reperfusion injury.
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Objective To observe the changes in bone mineral density and microstructure parameters in sclerostin (SOST) gene knockout mice treated with glucocorticoid.Methods 12 4-week-old SOST knockout mice were randomly divided into two groups (n =6):methylprednisolone intervention group [SOM group,methylprednisolone 3 mg/(kg· d),subcutaneous injection],placebo group (SOS group,isovolumetric saline subcutaneous injection).12 wild-type mice were randomly divided into two groups (n =6):wild-type placebo group (WTS group,isovolumetric saline subcutaneous injection),wild methylprednisolone intervention group [WTM group,methylprednisolone 3 mg/(kg · d),subcutaneous injection].12 weeks later,mice were sacrificed and one lumbar vertebra of each mouse was selected for microCT analysis.Results There was no difference in bone mineral density (BMD),trabecular volume fraction,trabecular number and trabecular thickness between SOM and SOS groups (P ＞ 0.05).BMD,trabecular volume fraction,trabecular number and trabecular thickness in SOM and SOS groups were significantly higher than those in WTS and WTM groups (P ＜0.05).BMD,trabecular volume fraction,trabecular number and trabecular thickness in WTM group were significantly lower than those in WTS group (P ＜ 0.05).Conclusions Sclerotin gene knockout mice can resist glucocorticoid-induced bone loss and bone microarchitectural deterioeration.The treatment of osteoporosis with SOST/sclerotin as a target will be an effective method in the future.
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Objective To investigate the effect of sevoflurane anesthesia on hepatic ischemia-reperfusion injury in patients undergoing partial hepatectomy.Methods A total of 86 patients undergoing partial hepatectomy were divided into sevoflurane group and isoflurane group according to random number table with 43 patients in each group.Both groups received continuous epidural block combined with general anesthesia,sevoflurane group took sevoflurane combined with remifentanil to maintain anesthesia,while isoflurane group took isoflurane remifentanil to maintain anesthesia.The mean arterial pressure (MAP) and heart rate (HR) of different moments,awakening (open-eye time,extubation time,listening to instruction time,orientation recovery time,time of Aldrete score up to 9 minutes),the serum levels of tumor necrosis factor alpha (TNF-α),interleukin 1 (IL-1),aspartate aminotransferase (AST),alanine aminotransferase (ALT),glutamate dehydrogenase (GLDH),alpha glutathione S transferase (α-GST) levels at different moments were compared between the two groups.Results The MAP and HR at T1,T2,T3 and T4 in both groups were significantly lower than those at T0 (P ＜ 0.05).The HR at T1 and T4 in sevoflurane group were significantly higher than those in isoflurane group (P ＜ 0.05).The open-eye time,extubation time,listening to instruction time,orientation recovery time in sevoflurane group were significantly shorter than the isoflurane group (P ＜ 0.05).The levels of serum TNF-α,IL-1,AST,ALT,GLDH and α-GST in the two groups at T2 and T3 were significantly higher than those at T0 (P ＜ 0.05),and began to fall back to T4.The levels of serum TNF-α,IL-1,AST,ALT,GLDH and α-GST in the sevoflurane group at T2 and T3 were significantly lower than those in the isoflurane group (P ＜ 0.05).Conclusions The hepatic hemodynamics in patients undergoing partial hepatectomy with sevoflurane is more stable better than isoflurane during operation,which has faster postoperative recovery and relieved hepatic ischemia-reperfusion injury.
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Objective@#To observe the changes in bone mineral density and microstructure parameters in sclerostin (SOST) gene knockout mice treated with glucocorticoid.@*Methods@#12 4-week-old SOST knockout mice were randomly divided into two groups (n=6): methylprednisolone intervention group [SOM group, methylprednisolone 3 mg/(kg·d), subcutaneous injection], placebo group (SOS group, isovolumetric saline subcutaneous injection). 12 wild-type mice were randomly divided into two groups (n=6): wild-type placebo group (WTS group, isovolumetric saline subcutaneous injection), wild methylprednisolone intervention group [WTM group, methylprednisolone 3 mg/(kg·d), subcutaneous injection]. 12 weeks later, mice were sacrificed and one lumbar vertebra of each mouse was selected for micro-CT analysis.@*Results@#There was no difference in bone mineral density (BMD), trabecular volume fraction, trabecular number and trabecular thickness between SOM and SOS groups (P>0.05). BMD, trabecular volume fraction, trabecular number and trabecular thickness in SOM and SOS groups were significantly higher than those in WTS and WTM groups (P<0.05). BMD, trabecular volume fraction, trabecular number and trabecular thickness in WTM group were significantly lower than those in WTS group (P<0.05).@*Conclusions@#Sclerotin gene knockout mice can resist glucocorticoid-induced bone loss and bone microarchitectural deterioeration. The treatment of osteoporosis with SOST/sclerotin as a target will be an effective method in the future.
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OBJECTIVE@#To isolate the collagen phagocytic subpopulation of fibroblast (CPSF) and non-collagen phagocytic subpopulation of fibroblast (nCPSF) and to identify their differentially expressed genes. @*METHODS@#The CPSF and nCPSF was isolated by using collagen-fluorescein-isothiocynate-latex bead (COL-FITC-LB) phagocytosis technique and FCM sorting method. Microarray analysis was used to screen the differentially expressed genes, which were verified by real-time PCR. @*RESULTS@#CPSF and nCPSF was successfully isolated. Seventeen differentially expressed genes were identified. Compared with nCPSF, the expression of 12 or 5 genes was up-regulated or down-regulated in CPSF. Three of the 12 up-regulated genes were urokinase plasminogen activator receptor-associated protein (uPARAP), cytochrome b-245, beta polypeptide (CYBB) and Hook homolog 1 (HOOK1), which were confirmed by real-time PCR. uPARAP mRNA expression level in CPSF was 2788 times of that in nCPSF. CYBB mRNA expression in CPSF was only 0.85 times of that in nCPSF. HOOK1 mRNA expression in CPSF was 1.96 times of that in nCPSF (P<0.05). @*CONCLUSION@#A novel method is successfully established to isolate CPSF and nCPSF. uPARAP is the main differentially expressed gene in CPSF and nCPSF, which is obviously involved in the fibroblast collagen phagocytosis. It might be a potential biomarker for treatment of collagen diseases.
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Humains , Collagène , Génétique , Régulation négative , Fibroblastes , Biologie cellulaire , Analyse sur microréseau , Phagocytose , Régulation positiveRÉSUMÉ
Objective:To investigate the safety and efficacy of laminectomy combined with vertebroplasty in spinal metastases from rapid-growth tumors. Methods:Clinical data of 23 patients with spinal metastases of lung cancer, who were admitted to the Cancer Hospital from July 2008 to May 2012, were retrospectively analyzed. Thirteen male and ten female patients, with an age range from 40 years to 65 years and a mean age of 51.5, were examined. All patients received posterior laminectomy to relieve spinal cord compression. Afterward, vertebroplasty combined with radiofrequency ablation was conducted, followed by the internal fixation of vertebrae (instrumental fixation). Operation time, blood loss, and bone cement leakage rate were analyzed. One month before and after the operation, pain measurement was conducted using visual analog scale (VAS) and neurologic deficit (spinal cord injury) by Frankel Grade. Functional impairment was classified by Karnofsky performance status (KPS) score. Quality of life was assessed by the European Organization for Research and Treatment questionnaire (EORTC QLQ-C30). Results:The mean operation time was 163±87.36 min. Blood boss was 430±130.35 mL. Bone cement leakage rate was 21.7%. One month before and after surgery, the VAS showed statistical significance (t=25.6, P<0.01). After surgery, 78.3%of all patients exhibited functionally satisfactory Frankel Grade D or E, compared with 43.5%of patients before the operation. KPS score (80 to 100) percentage was 69.6%after surgery compared with 34.8%before surgery. One month after the operation, remission of various degrees was seen in 10 of 18 patients who had sphincteric dysfunction before surgery (55.6%). The EORTC QLQ-C30 score was 85.39±8.99 before and 52.78±15.17 after operation. The quality of life improved significantly (t=11.6, P<0.01). Conclusion:Posterior laminectomy and vertebroplasty combined with radiofrequency ablation for spinal metastases from lung cancer is safe and effective. The treatment can improve pain, function, and life quality of patients with lung cancer spinal metastases.
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BACKGROUND:Previous studies have demonstrated that transplantation of control ed release glial cellline-derived neurotrophic factor and bone marrow mesenchymal stem cells-derived neuron-like cells can effectively promote the motor function and sensory function recovery of rhesus monkeys with spinal cord injury. OBJECTIVE:To validate whether co-transplantation of control ed release glial cellline-derived neurotrophic factor and bone marrow mesenchymal stem cells-derived neuron-like cells exhibits better protective effects on spinal cord glial scar of rhesus monkeys with spinal cord injury than celltransplantation alone. METHODS:Twelve rhesus monkeys were col ected to prepare animal models of acute severe spinal cord injury using modified Al en’s method, and then randomly divided into three groups:experimental group, co-transplantation of control ed release glial cellline-derived neurotrophic factor and bone marrow mesenchymal stem cells-derived neuron-like cells;control group, simple transplantation of bone marrow mesenchymal stem cells-derived neuron-like cells;blank control group, PBS. After 5 months, paraffin specimens of the spinal cord were made for detection of morphological and compositional characteristics of glial scar, regeneration of nerve fibers in the scar, glial scar area, and average absorbance of glial fibril ary acidic protein. RESULTS AND CONCLUSION:Glial scar in the injured spinal cord was composed of astrocytes and histocytes. Less spinal cord glial scar area and lower absorbance value could be observed in the experimental and control groups as compared with the blank control group (P<0.05). In addition, in the blank control group, neurofilament negative fibers could be observed in the glial scar, and astrocytes proliferated obviously. The experimental and control groups showed less fibers passed through the scar area. The glial scar area and average absorbance in the experimental group was lower than that in the control group (P<0.05). These findings suggest that compared with simple transplantation of bone marrow mesenchymal stem cells-derived neuron-like cells, co-transplantation of control ed release glial cellline-derived neurotrophic factor and bone marrow mesenchymal stem cells-derived neuron-like cells shows better protective effects spinal tissue structure after spinal cord injury, which may be one of mechanisms by which the number of glial scars is reduced to a greater extent.
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Objective To investigate the expressions and the relationship of FEZ1 and p16 in cervical intraepithelial neoplasia (CIN).Methods The expressions of FEZ1 and p16 in 93 cases of CIN and 10 cases of normal cervical specimens were detected by immunohistochemistry.Results The positive expression rates of FEZ 1 were 90.0％ (9/10) of normal cervical specimens,67.9％ (19/28) of CIN I,36.0％ (9/25) of CIN Ⅱ,22.5％(9/40) of CIN Ⅲ.The positive expression rates of p16 were 10.0％(1/10) of normal cervical specimens,32.1％(9/28) of CIN I,76.0％(19/25) of CIN Ⅱ,92.5％(37/40) of CIN Ⅲ.There were significant differences in the positive expression rates of FEZ1 and p16 between CIN Ⅰ and CIN Ⅲ (P ＜ 0.01),there was no significant difference in the positive expression rates of FEZ1 and p16 between CIN Ⅱ and CIN Ⅲ.The expression of FEZ1 and p16 was negatively correlation in CIN (r =-0.712,P＜ 0.01).Conclusion The abnormal high expression of p16 and abnormal low expression of FEZ1 in CIN may be involved in the occurrence and development of CIN,detecting the expressions of the two indexes may be helpful for clinical diagnosis.
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ObjectiveTo investigate the safety and efficacy of combined treatment with subtotal corpectomy and radiofrequency ablation(RFA) for spinal metastases. MethodsFrom April 2009 to March 2010, 29 patients with spinal metastases who received subtotal corpectomy were analyzed. Sixteen patients (7 men and 9 women) with an average of 57.8 years having received subtotal corpectomy alone were selected for comparison (the subtotal corpectomy group). Thirteen patients (7 men and 6 women) with an average of 58.3 years having received subtotal corpectomy combined with RFA were chosen as subjects of this study (the RFA combination group). There were no significant differences between the two groups with respect to the patient's age, gender, and Tomita type. Pain levels pre-and post-procedure were assessed by the visual analogue scale(VAS), and neurologic deficit were evaluated by the Frankel scale. ResultsThe VAS in RFA combination group were 8.88±0.36, 3.76±0.33, 3.35±0.38 in preoperation, 1 month, and 6 months postoperatively, respectively. The VAS in subtotal corpectomy group were 8.96±0.39, 3.81 ±0.48, 3.41 ±0.42 in preoperation, 1 month, and 6 months postoperatively, respectively. The VAS in both groups showed statistical significance at each time point, there was no statistically difference between the two groups. The operate time in RFA combination group and subtotal corpectomy group were(216.54±113.77) min and(302.50±80.44)min, respectively. The blood loss of the two groups were (1084.62±539.82)ml and (1625.00±724.34)ml, respectively. The recurrent rate of the two groups were 30.8％ and 75.0％, respectively. The RFA combination group were lower in operate time, blood loss and recurrent rates than subtotal corpectomy group. Conclusion Compared with the subtotal corpectomy, the RFA combination can reduce the blood loss, operation time, and the recurrent rates.
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Objective To summarize the diagnosis and surgical treatment of the cavernous transformation of portal vein (CTPV). Methods Clinical data of 63 patients with adult CTPV trea-ted in our hospital from 1976 to 2006 were retrospectively analyzed. Results The diagnosis of CT-PV was comfirmed according to (1) The main symptoms were repeated haematemesis, hemafecia, hy-persplenotrophy, hypersplenia and normal hepatic function. (2) B uhrasonography or ultrasonic Doppler manifested that portal vein thinning or obstruction or embolism, honeycomb appearance con-duit can be seen around. Portal vein frequency spectrum can be seen in the honeycomb appearance con-duit. (3) CT and MR scan materials were exhibited that the main portal vein and its branches lost the normal shape and had the shaggy edge. (4) percutaneous splenoportography or selective arteriography of superior mesenteric artery showed that occlusion of the main branch of portal vein at the porta hepa-tis was revealed, and a masslike network of tortuose veins around the porta hepatis and many small ir-regular veins radiating from the network to the liver were demonst rated. Splenectomy and devaseu-larization was performed in 23, spleneetomy and splenorenal shunt in 32, portal systemic shunt plus porta-azygous devascularization in 8. Portal hypertension was treated first in CTPV with disease of biliary tract. No death happened. The rascult of haemogram recovered in a short period of time.Conclusion Once the patients are diagnosed to suffer from adult CTPV, they should receive explora-tory laparotomy. It is important to choose the most effective treating method for the disease.
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Objective To investigate osteocyte density as a potential index of bone biomechanical property. Methods Forty 7-month-old female Sprague-Dawley rats were randomly group (EST) and sham operation group (SHAM). At 15 weeks postoperation, the compression test was performed on L5 vertebral body and micro-computed tomography (μ-CT) was used to estimate the three-dimensional bone mineral density (BMD) and three-dimensional microstructure parameters of L6 vertebral body. After fatigue damage testing, the L6 vertebral body was bulk-stained in 1% basic fuchsin and embedded in methylmethacrylate. Mounted bone slices were used to measure microcrack parameters and osteocyte density. Results At 15 weeks postoperation, osteocyte density (Ot. N/T. area) was significantly decreased in OVX group compared with SHAM group and EST group [(1268. 1 ±191.2)/mm2 vs. (1760. 8 ± 376.6)/mm2 and (1550. 9± 202.2)/mm2, F = 3.513,P<0. 05]. Maximum load (ML) was significantly decreased and the length of microcrack (Cr. Le) was significantly increased in OVX group compared with SHAM group, EST group and GEN group [(84. 4±16.9)N vs. (110.3±25.6),(103. 9±15. 8)and(110.1±4. 9)N; (58. 1±6.8) μm vs. (24.2±8. 1), (36. 5±9. 7)and(28.5±7. 5)μm, F=9. 561,3. 179, all P<0. 05]. Compared with SHAM group and EST group, bone trabecula connection density (Conn. D) was significantly decreased and trabecular separation (Tb. Sp) was significantly increased in OVX group [(47.4±7.4) m-3 vs. (71.8±16.0)and (74.0±12.7)m-3;(315.0±32.7)μm vs. (222. 5±21.7)and (273.3± 50.0)μm, F=7. 635,7. 007, all P<0. 05]. Bone mineral content (BMC) was lower in OVX group than that in SHAM group[(6.5±2. 2)g vs. (7. 9±1.2)g, P<0. 05]. When data in four groups were overall analyzed, Ot. N/T. Ar was positively correlated with ML, Conn. D and BMC (R2 = 0. 7874, 0. 1153, 0. 1309, all P<0. 05), but was negatively correlated with Cr. Le and Tb. Sp (R2 =0. 5738, 0. 3964, both P < 0.05). Conclusions Osteocyte plays a crucial role in maintaining bone biomechanical property and osteocyte density may be considered as a useful indicator for assessing bone biomechanical property.
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This study was to investigate the effects of the combination of deoxynivalenol (DON) and zearalenone (ZON) on pigs. Twenty-four weaning piglets were divided into a control group fed a diet free of mycotoxins and a toxin group fed a diet containing 1 mg/kg DON and 250 microgram/kg ZON. The results showed that supplementation of DON and ZON in diets had extensive effects on pigs. More specifically, DON and ZON caused levels of total protein, albumin, and globulin in sera to decrease (p < 0.05) by 14.5%, 6.5% and 11.3%, respectively, and at the same time increased (p < 0.05) the serum enzyme activities of gamma-glutamyltransferase, aspartate aminotransferase and alanine aminotransferase by 72.0%, 32.6% and 36.6%, respectively. In addition, DON and ZON decreased (p < 0.05) the level of anticlassical swine fever antibody titers by 14.8%. Real-time PCR showed that DON and ZON caused the mRNA expression levels of IFN-gamma, TNF-alpha, IL-2, to decrease (p < 0.05) by 36.0%, 29.0% and 35.4%, respectively. Histopathological studies demonstrated that DON and ZON caused abnormalities in the liver, spleen, lymph nodes, uterus, and kidney. The concentrations of DON and ZON used in this study are in line with the published critical values permitted by BML. Our study clearly put the standard and adequacy of safety measures for these toxins into question. The authors suggest that with the increasing availability of cellular and molecular technologies, it is time to revisit the safety standards for toxins in feeds so as to make feeds safer, providing consumers with safer products.
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Animaux , Femelle , Aliment pour animaux/analyse , Phénomènes physiologiques nutritionnels chez l'animal , Régime alimentaire/médecine vétérinaire , Association de médicaments , Suidae , Maladies des porcs/sang , Trichothécènes/administration et posologie , Zéaralénone/administration et posologieRÉSUMÉ
In light of the IT development in hospitals, the authors point out the necessity of setting up the post of CIO and clarify the role of the CIO in the construction and management of the hospital information system. They argue that the CIO should not only be in charge of the technology support of the information network platform, but also exercise the function of managing hospital information. While hospitals ought to attach importance to the development and application of information systems and the role of the CIO, the CIO, on his part, ought to try to enhance his competence and become a versatile talent expert at various disciplines like medicine, management and the computer.
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AIM: To investigate the effect of probucol on proliferation of rat vascular smooth muscle cells(VSMC) stimulated by basic fibroblast growth factor (bFGF) and/or hydrogen peroxide(H 2O 2). METHODS: Effects of probucol on VSMC proliferation and DNA synthesis stimulated by bFGF and/or H 2O 2 were observed by means of MTT test, cell number count and [ 3H]-TdR incorporation. RESULTS: ①Probucol significantly inhibited proliferation and DNA synthesis in VSMC stimulated by bFGF and/or H 2O 2, with dosage-dependent manner. Cell number, A value and [ 3H]-TdR incorporation in group probucol+bFGF and group probucol+H 2O 2 were reduced by 40.0%, 39.1%, 45 5% and 46 9%, 45 0%, 39 5%, respectively, compared with group bFGF and group H 2O 2 ( P 0.05). CONCLUSION: Probucol dramatically inhibited proliferation and DNA synthesis in VSMC stimulated by bFGF and/or H 2O 2, but had no inhibitory effect on the cell proliferation prestimulated by bFGF and /or H 2O 2. [