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BACKGROUND:Current studies have confirmed that Ganoderma lucidum polysaccharides can promote nerve regeneration in neurodegeneration-related diseases.The occurrence of neurodegenerative diseases is closely related to mitochondrial dysfunction,but the role of Ganoderma lucidum polysaccharides on the regulation of apoptosis and mitochondrial function in neurodegenerative diseases is not yet clarified. OBJECTIVE:To explore the regulatory effects and mechanisms of Ganoderma lucidum polysaccharides on apoptosis and mitochondrial dysfunction in H2O2-induced SH-SY5Y cells. METHODS:SH-SY5Y cells were divided into three groups:control group,H2O2 group,and Ganoderma lucidum polysaccharides group.Cells in the control group were normally cultured.Cells in the H2O2 group were treated with 300 μmol/L H2O2 for 24 hours.In the Ganoderma lucidum polysaccharides group,the intervention with 300 μg/L Ganoderma lucidum polysaccharides was conducted first for 1-2 hours,followed by the addition of 300 μmol/L H2O2 for 24 hours.The mitochondrial membrane potential was detected by JC-1 kit.Apoptosis was detected by TUNEL staining kit.The activities of malondialdehyde and superoxide dismutase were detected by malondialdehyde test kit and superoxide dismutase test kit,respectively.The apoptosis and expression of mitochondrial dynamics-related proteins were detected by immunofluorescence staining and western blot assay. RESULTS AND CONCLUSION:(1)Compared with the control group,the mitochondrial membrane potential and superoxide dismutase activity were significantly reduced,as well as apoptotic rate and malondialdehyde levels were significantly increased in the H2O2 group(P<0.05).After treatment with Ganoderma lucidum polysaccharides,the membrane potential and superoxide dismutase activities were significantly increased,and apoptotic rate and malondialdehyde levels were significantly reduced compared with the H2O2 group(P<0.05).(2)The expression levels of pro-apoptotic proteins Bax and Caspase-3 were significantly increased,but the expression of anti-apoptotic protein Bcl-2 was significantly decreased in the H2O2 group compared with the control group(P<0.05).Compared with the H2O2 group,the levels of Bax and Caspase-3 were significantly decreased,but the expression of anti-apoptotic protein Bcl-2 was significantly increased in the Ganoderma lucidum polysaccharides group(P<0.05).(3)Compared with the control group,the expression of mitochondrial splitting proteins Fis1 and p-Drp1 was significantly increased,but the expression of mitochondrial fusion proteins OPA1,Mfn1,and Mfn2 was decreased in the H2O2 group(P<0.05).Compared with the H2O2 group,Fis1 and p-Drp1 expression was significantly reduced,but the expression levels of OPA1,Mfn1,and Mfn2 were significantly increased in the Ganoderma lucidum polysaccharides group(P<0.05).(4)The above results confirm that Ganoderma lucidum polysaccharides can attenuate H2O2-induced oxidative stress damage and apoptosis in SH-SY5Y cells by ameliorating mitochondrial dysfunction.
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Objective To explore the common pathogens distribution and the drug resistance pattern in vitro from cerebrospinal lfuid culture in children. Methods The results of cerebrospinal lfuid culture in hospitalized children from January 2007 to December 2014 were retrospectively analyzed. Bacteria identiifcation and antimicrobial susceptibility were assayed by Vitek system from Bio Mrieux Company. Some bacterial strains were tested by disk diffusion method. Results Cerebrospinal lfuid from 23099 patients were tested at least one time during research period. 671 strains of bacteria were isolated with positive rate of 2 . 9%, among which there were 579 strains of gram positive bacteria ( 86 . 3%) and 92 strains of gram negative bacteria ( 13 . 7%). The top ifve bacteria were coagulase negative Staphylococcus ( 399 strains, 58 . 9%), Micrococcus ( 37 strains, 5 . 5%), Streptococcus pneumoniae (34 strains, 5.1%), Escherichia coli (32 strains, 4.8%), and Enterococcus faecium (26 strains, 3.9%). The positive rates of cerebrospinal lfuid culture in 8 consecutive years showed a downward trend (χ2?=?10 . 410 , P=?0 . 001 ). The positive rates of coagulase negative Staphylococci showed annual decline trend (χ2?=?31 . 200 , P
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″Tianjin Port 8 · 12 Catastrophic Explosion Accident″ affected the national people′s heart. After the disaster,the chemical defense,medical,explosion and so on various relevant profes?sional experts and rescue teams responded to the national call. Taking the bull by the horns,pooling the wisdom and efforts,the experts and rescue teams carried out and implemented the decision spirit of ″it should not hurt one man,and should not appear serious secondary disasters in the late treat?ment″which put forward by the Party Central Committee and State Council. In order to better learn and sum up experience,the cause of the disaster,the disaster rescue and disposal process,the enlighten?ment brought by the disaster and the recommendations deal with unexpected chemical incidents in the future was discussed in this paper.
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Objective To elucidate the clinical and pathological characteristics of patients with mercury poisoning-associated glomerulonephropathy. Methods Seven patients with mercury poisoning-associated glomerulonephropathy were enrolled in this study. The pattern of mercury exposure, feature of mercury toxicity, and clinicopathological presentation of the kidneys were investigated. Results They were all female, averaged (28.9 ±8.1) years old. Skin-whitening cream was the only cause of mercury poisoning. Proteinuria occurred 5 to 8 months after exposure. Serum mercury were 27.0 to 98.0 μg/L, and spot urinary mercury were 34.4 to 204.0 μg/L. The presentation of all the patients was mild to moderate edema with proteinuria and decreased serum albumin level. Five patients (5/7) were diagnosed as nephrotic syndrome. Six patients underwent renal biopsy: 3 cases with minimal change disease, 2 cases with membranous nephropathy and 1 case with focal segmental glomerular sclerosis. All the patients were administrated chelation therapy with sodium dimercaptopropanal sulfonate or sodium dimercaptosuccinic acid for 3 to 7 courses. They got complete remission by 3 to 5 weeks treatment. Conclusions Patients in this study with glomerulonephropathy induced by mercury poisoning are all from skin-whitening cream exposure. Mild to moderate edema and proteinuria are the common clinical pattern. Minimal change disease, membranous nephropathy and focal segmental glomerular sclerosis are found pathologically. Chelation therapy is effective.
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Objective To summarize the clinical features of mercury poisoning diagnosed by blood and urine tests for improving the diagnosis and treatment of the disease.Methods Poisoning causes,clinical manifestations,diagnosis,treatment and prognosis were retrospectively reviewed in 92 in-patients with mercury poisoning in our hospital from January 2000 to April 2010.Results Of the 92 patients,37 were male and 55 were female with an average age of 33.1(2-65)years old.The mercury poisoning was caused by occupational exposure and non-occupational exposure,such as iatrogenic exposure,life exposure and wrong intake or suicidal intake of mercury-containing substances,mainly through respiratory tract,digestive tract and skin absorption.The most common clinical symptoms were as the followings:nervous system symptom,such as memory loss in 50 eases(54.3%),fatigue in 34(37.0%),numb limb in 25 (27.2%),dizziness and headache in 22(23.9%),cacesthesia in 20(21.7%),fine tremor(finger tip,tongue tip,eyelids)in 15(16.3%),insomnia and more dreams in 12(13.0%);gastrointestinal symptoms:nausea in 16 (17.4%),abdominal pain in 14(15.2%),stomatitis in 5(5.4%);joint and muscle symptoms:muscle pain in 16(17.4%),joint pain in 5(5.4%);cardiovaseular system:chest tightness,hean palpitations in 6(6.5%);urinary system:edema in 9(9.8%);other system:hidrosis in 20(21.7%).After the treatment with sodium dimercaptopropane sulfonate (DMPS),the symptoms were gradually alleviated.Their gastrointestinal,cardiovascular symptoms were alleviated within 2 weeks;neurological symptoms were alleviated within 3 months;kidney damage showed a slower recovery and could be completely'alleviated within 6 months.Conclusions Because of its diverse clinical symptoms,the mercury poisoning was easy to misdiagnosis and missed diagnosis:therefore the awareness of the disease should be further enhanced.Leaving from the poisoning environment timely and giving appropriate treatment with DMPS will lead to a satisfactory prognosis.
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OBJECTIVE To study the situation of nosocomial infection of maintenance hemodialysis of chronic renal failure patients and discuss the risk factors and preventive measures.METHODS Retrospective analysis of our hospital clinical data in hemodialysis patients with nosocomial infection from Jan 2005 to Dec 2006 was taken.RESULTS There were 44 nosocomial infection cases from 89 cases.The infection rate was 49.43%.Hemodialysis patients were high-risk population of the nosocomial infection.The common infection site was the respiratory tract(52.27%),followed by central venous catheter-related infections(25.00%),urinary tract infections(15.91%) and intestinal infections(6.82%).The primary diseases of diabetic nephropathy,serious anemia,low albumin and elderly were the risk factors(P
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Objective To find the correlative factors which induce breath failure in acute tetramine poisoning cases, and to work out a right treatment scheme for these cases. Methods 47 cases were clinically diagnosed as slight, middling and severe poisoning, separately. The tetramine concentration in blood was compared between the three groups to reveal the relationship between blood concentration of tetramine and breath failure. Patients with breath failure were treated with muscle relaxant plus mechanical ventilation. Repeated hemoperfusions were given to the severe poisoning patients. Results No breath failure occured in both slight and middling groups, while in severe poisoning group, breath failure happened in 33.3% (4/12) patients aged below 15, and in 31.8% (7/22) adult patients aged above 15. Repeated hemoperfusion declined the tetramine concentration in blood, and gave a better effect than with CVVH or CVVHD treatment. muscle relaxant plus mechanical ventilation may control the symptom of twitching completely, and prevent from breath failure effectively. Conclusion Breath failure in acute tetramine poisoning cases was induced by systemic twitching and high blood tetramine concentration. It is very important to grade the poisoning cases according to poisoning degree. Repeated hemoperfusion is the best for blood purification. muscle relaxant plus mechanical ventilation may reduce the mortality effectively.
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AIM:To study the purified factors of Guanxinning for Injection(Radix et Rhizoma salviae miltiorrhizae,Rhizoma Chuanxiong,etc). METHODS: The total of salvianolic acid B、protocatchuci aldehyde and ferulic acid were used to evaluate for the study of type of macroporous adsorption resin,sample volume,the ratio of diameter to height,pH value and sample consistency etc. RESULTS: pH value Guanxinning extract was adjusted to 3.0,through D101 resin finally reached the ratio of diameter to height 1∶2,4 times of water was applied to elution and then 3 times of 70% ethanol for re-elution and collected. CONCLUSION: These factors are approprite for purifying Guanxinning for Injection.