Animals ; Hypothyroidism ; physiopathology ; Learning ; Memory ; Mice ; Motor Activity

Objective To analyze the type of acid-base disturbance caused by severe pneumonia in newborn infants .Methods Venous blood of neonate with severe pneumonia(SP group) were collected to detect serum electrolyte and blood gas analysis 12 hours before and after oxygen therapy .The results of serum electrolyte and blood gas were compared 12 hours before and after oxygen therapy ,and the results of acid-base disturbance between SP group and control groups were compared.Results There were mostly metabolic acidosis incorporated respiratory acidosis in all neonate in SP group,which were with increased anion gap (AG) and obviously higher than that of control group(t=1.27 P

Objective To investigate the molecular mechanism of Klebsiella pneumoniae resistant to carbapenem. Methods The minimal inhibitory concentrations ( MICs) of the antimicrobial agents were determined by E-test. The 23 β-lactamase genes and 2 porin genes were amplified by polymerase chain reaction (PCR) , then the products were purified and their sequences were analyzed. Results The MICs of piperacillin, piperacillin/sulbactam, amoxicillin/clavulanic acid, cefoperazone/sulbactam, cefotaxime, cefepime and aztreonam to 5 strains of Klebsiella pneumoniae were all higher than 128 μg/mL, and those of imipenem or meropenem were higher than 32 μg/mL. All isolates carried blaTEM-1 and blaDHA-1 genes. Deletion of ompK35 and ompK36 were observed in Kp01 and Kp03, and the deletion of ompK35 was also observed in Kp02 and Kp05. Base insertion of ompK36 occurred in Kp02, Kp04 and Kp05. Compared with GenBank (GU945384) , ompK35 gene mutations of G→C at base 465 and T → C at base 466 in Kp04 lead to Gln to His substitution at position 155 and Tyr to its substitution at position 156, and it might be a new subtype. Conclusion The production of DHA-1 β-lactamase combined with the loss of OmpK36 or OmpK35 in porin genes may contribute to high-level carbapenem resistance in Klebsiella pneumoniae.

ObjectiveTo study the hemoprotective effects of rotating and stationary magnetic field(RSMF) in mice treated with 5-Fluorouracil(5-FU).MethodsThe BalB/C mice were randomly divided into control group and RSMF-treated group.The mice were injected with 5-FU,the dose were 150,180,210,250 mg/kg respectively. RSMF-treated group was exposed to RSMF for 1 h a time,twice a day during 30 consecutive days,and the magnetic intensity was 0.6 T.The survival rate and survival days during the 30 days were observed.7,10,14,21,28 days after injection,the peripheral blood cells were counted.On day 8,10 and 14,the number of bone marrow mononuclear cells(BMNC) and the forming ability of colony-forming unit-granulocyte/macrophage(CFU-GM) were measured.The pathological section of femur and the expression level of bone morphogenic proteins(BMPs) in bone marrow were evaluated.ResultsRSMF could increase the survival rate and survival days of mice treated with 5-FU,and induce an increase in hemoglobin concentration,white blood cell count(WBC),red blood cell count(RBC) and platelet number.Also,RSMF could increase the number of BMNC and improve the forming ability of CFU-GM on days 8～14.Furthermore,RSMF could improve the bone marrow angiogenesis and the expression level of BMPs.ConclusionRSMF have an obvious protective effect against chemotherapeutic injury,and it can accelerate the recovery of hematopoiesis and hematopoietic microenvironment in mouse bone marrow.

Objective To observe the effect of propofol target controlled infusion with different blood plasma target concentration on stress reaction during the nasal endoscope operation. Methods Sixty patients with ASA Ⅰ - Ⅱ scheduled for the nasal endoscope operation were divided into three groups by random digits table: each group was 20 patients, group A, B, C was given propofol target controlled infusion with blood plasma target concentration 3,4,5 μ g/mi respectively. Heart rate (HR), mean arterial pressure (MAP), pulse oxygen saturation (SpO2), blood glucose, serum cortisol, bispectral index ( BIS ), extubation time were recorded before anesthesia,at 30 min after the operation starting and 60 min after the extubation.Results The descent degree of HR and MAP at 30 min after the operation starting were group C ＞ group B ＞ group A (P = 0.024,0.010 );the descent degree of MAP at 60 min after the extubation were group C ＞group B ＞ group A (P = 0.011 ). BIS and extubation time were 65 ± 8 and (25 ± 7) min in group A, 53 ± 11 and( 36 ± 13 ) min in group B, 45 ± 12 and(45 ± 9 ) min in group C, there were significant differences among three groups(t = 2.476,P= 0.023;t = 2.657,P= 0.012). The blood glucose was increased at 30 min after the operation starting and 60 min after the extubation, the ascensus degree were group A ＞ group B ＞ group C (P= 0.000、0.000);the serum cortisol was decreased at 30 min after the operation starting, the descent degree was group C ＞ group B ＞ group A (P= 0.000), increased at 60 min after the extubation, the ascensus degree was group A ＞ group B ＞ group C (P= 0.001 ). Conclusions Propofol target controlled infusion with blood plasma target concentration 4-5 μ g/ml can ensure eligible depth of anesthesia, decrease pain stimulus, remain stable vital sign,depress the stress reaction caused by nasal endoscope operation efficiently,with short extubation time. It is an eligible blood plasma target concentration.

Bronchitis ; diagnosis ; Diagnostic Errors ; Humans ; Infant ; Male

Adolescent ; Child ; Child, Preschool ; Female ; Humans ; Immunoglobulins, Intravenous ; therapeutic use ; Infant ; Infant, Newborn ; Male ; Prednisone ; therapeutic use ; Purpura, Thrombocytopenic, Idiopathic ; drug therapy

Objective To evaluate the efficacy of intravenous methylprednisolone for prevention of tracheal intubation-related laryngopharyngeal complications.Methods Three hundred ASA Ⅰ or Ⅱ patients,aged 20-50 yr,weighing 50-80 kg,undergoing elective surgeries,requiring tracheal intubation under general anesthesia,were included and randomized into 5 groups (n =60 each).Methylprednisolone 40 and 80 mg were injected intravenously at 30 min before induction of anesthesia in groups Ⅰ and Ⅱ,respectively,while the equal volume of normal saline was given instead in group Ⅲ.Methylprednisolone 40 and 80 mg were injected intravenously at 30 min before extubation in groups Ⅳ and Ⅴ,respectively.The sore throat,hoarseness and cough were recorded within 24 h after extubation and the severity was evaluated at 1 and 24 h after extubation.Results There was no significant difference in the incidence and severity of sore throat,hoarseness and cough between the five groups (P ＞ 0.05).Conclusion Intravenous methylprednisolone can not effectively prevent tracheal intubation-related laryngopharyngeal complications in patients.

Objective To study the hemoprotective effects of a rotary magnetic field(RMF)with radiation- injured mice.Methods C57 BL6/J mice were randomly divided into a control group and a magnetic treatment group.The mice received total body irradiation with 7.0 Gy and 6.5 Gy ~(137)Cs?rays.The treatment group was trea- ted with a RMF for one hour at a time,twice a day.The intensity of the RMF was 0.6T.The survival rate was ob- served for 30 days.On day 7,10,14,21,28 after irradiation,the subjects' peripheral blood cells were counted.On day 12 and 16,the number of bone marrow mononuelear cells(BMNCs)was measured and their ability to form granu- locyte-macruphage colony-forming unit(CFU-GM)was assessed.The pathological sectioning of the femur was per- formed and the expression level of bone morphogenetic proteins(BMPs)in the bone marrow were evaluated.Re- sults The RMF treatment increased the survival rate and duration among the irradiated mice and the number of blood cells in their peripheral blood.Also,RMF treatment could increase the number of BMNCs and improve their ability to form CFU-GM on days 12-16.Furthermore,RMF could improve angiogenesis and the expression level of BMPs. Conclusion The RMF treatment had an obvious protective effect against the effects of irradiation,and it accelerated the recovery of hematopoiesis and the hematopoietic microenviroment in mouse bone marrow.

AIM: To investigate the behaviour of 3T3 fibroblast and macrophage co-culture on blood fibrin clot or adipose tissue with recombinant basic fibroblast growth factor (rhbFGF). METHODS: MTT method, inverted contrast microscopy, Giemsa staining as well as scanning electron microscope were used in the present study. RESULTS: The effect of rhbFGF on co-culture of 3T3 fibroblast and mouse macrophage on blood fibrin clot in low-serum DMEM with rhbFGF were monitored, and 3T3 fibroblast and macrophage growed well on the blood fibrin blot in low-serum DMEM with rhbFGF. CONCLUSION: The blood fibrin clot, with its low immunogenicity, could be used as a bionic support for three-dimensional tissue culture, and also a physiological carrier to distribute the growth factor rhbFGF for the cells.