Child ; Epstein-Barr Virus Infections ; Hematopoietic Stem Cell Transplantation ; adverse effects ; Herpesvirus 4, Human ; Humans ; Lymphoproliferative Disorders ; etiology ; virology ; Male

Objective To know the air benzo[a]pyrene (B[a]P) pollution level in a coke plant of Chongqing Iron & Steel Group. Methods The concentrations of B[a]P in coke oven operating environment were determined by high performance liquid chromatography (HPLC) in different places of work in Sep. 2008.B[a]P concentration at different distances on the surrounding regions of coke plant and real-time monitoring in every quarter around the different functional areas was conducted. Results The air B[a]P concentration in the coke plant was descending following the order: the top of coke oven, the side of coke oven, the bottom of coke oven. B [a]P concentrations of oven bottom, oven side, oven top showed a gradual increase tendency with the extension of the sampling time (P

BACKGROUND: Schwann cells play an important role in regeneration of peripheral nerves and the extracellular matrix(ECM) is also important to growth of Schwann cells.OBJECTIVE: To explore the effects of laminin and type Ⅳ collagen on the adhesion and proliferation of Schwann cells.DESIGN: A controlled trial in groups with Schwann cell as subject.SETTING: Plastic Surgery Laboratory of the Fourth Military Medical University of Chinese PLA.MATERIALS: The trial was conducted in the Plastic Surgery Laboratory of Xijing Hospital Affiliated to the Fourth Military Medical University of Chinese PLA from January through April in 1995. The Schwann cells were extracted from newborn rabbits.METHODS: The culture plates were coated with laminin and type Ⅳ collagen. While in the control group, the antibody of laminin and collagen Ⅳ,collagen Ⅰ and polylysine were added respectively. The Schwann cells of the same concentration were cultured in plates of each group. The cells attachment rate in each group ,was determined after 2, 6, 24 hours respectively. After 72 hours 3H-TdR were incorporated into culture matrix fluid and double channel liquid scintillation counter was used for measurement of radiactivity count per minute.MAIN OUTCOME MEASURES: ① Attachment rate of Schwann cell. ②3H-TdR counting.RESULTS: The attachment rates in laminin and collagen Ⅳ groups (66%and 59% ) were higher than those of the type Ⅰ collagen and polylysine groups(45% and 43% ) after 2-hour culturing. Those in laminin antibody and collagen Ⅳ antibody groups were lower. The incorporation value were (10.0±2.7)×103, (1.3±0.3)×103, (10.4±2.4)×103, (1.4±0.5) ×103, (5.8±2.7)×103, (3.3±1.0)×103 per minute respectively in laminin, laminin antibody, collagen Ⅳ, collagen Ⅳ antibody, collagen Ⅰ and polylysine groups. The incorporation values in laminin and collagen Ⅳgroups were higher than controls.CONCLUSION: Laminin and type Ⅳ collagen promote the attachment and proliferation of Schwann cells in vitro. This study provides experimental basis for applying the action of Schwann cell to the nerve tissue engineering.

Objective To investigate the effect of continuous renal replacement therapy ( CRRT) on the reg-ulation of Treg/Th17 in patients with severe sepsis,and related inflammatory factors IL-6,IL-17,IL-10,and TNF-α.Methods 60 patients with severe sepsis were randomly divided into two groups,30 cases in each group.The control group received conventional treatment,and the observation group was treated with CRRT on the basis of the control group.Flow cytometry was used to detect the levels of Tregs and Th17 cells,and IL-6,IL-10,IL-17 and TNF-αwere detected by ELISA method.At the same time,the APACHEII score,ICU length of hospital stay were observed and recorded.Results After treatment,APACHE Ⅱscore,ICU length of hospital of the observation group were lower than the control group,there were statistically significant differences(t=4.258,t=4.518,all P<0.05). The expression levels of Th17,Treg and Tregs/Th17 in the observation group were significantly lower than the control group,the differences were statistically significant (t=5.872,4.267,4.285,all P<0.05).The expression levels of IL-6,IL-17,TNF-αin the observation group decreased more significantly than the control group,the differences were statistically significant (t=5.829,5.257,5.983,all P<0.05).But the expression level of IL-10 in the two groups had no obvious change[(35.26 ±18.63) pg/mL vs (35.52 ±20.09) pg/mL,t=2.164,P>0.05].Conclusion CRRT can not only remove the inflammatory mediators of abnormal expression,improve the function of T cells,but also can maintain the balance between Th17 and Treg,improve the immune disorders,and improve the prognosis of sepsis.

Objective To investigate the change and clinical significance of blood D-dimer level during perioperative period in ad-vanced age hip fracture.Methods The blood D-dimer level in 60 patients aged over 80 years old with hip fracture was detected be-fore operation and after operation,which including at admission(T1 ),immediately preoperation(T2 ),immediately postoperation (T3 )and on postoperative 1 d (T4 ).Results The positive rates of D-dimer at T1 ,T2 ,T3 and T4 were 6.67%,16.45%,41.67%and 80.00% respectively;there were statistically significant differences between T3 ,T4 and T1 ,T2 ,between T3 and T4 (P <0.05);there was no statistically significant difference between T1 and T2 (P >0.05).Conclusion The level of D-dimer in advanced age hip fracture has significant change before and after operation.The change of the D-dimer positive rate is an effective index for preven-ting lower limbs deep venous thrombosis and has the important clinical significance to dynamically monitor the D-dimer level during perioperative period in advanced age hip fracture.

Objective To identify etiological factors for non-ulcer dyspepsia (NUD) in elderly patients presenting to the emergency department.Methods A total of 97 elderly patients with NUD presenting to the emergency department from January 2011 to December 2013 were enrolled in the NUD group and 116 elderly people undergoing annual physical examinations served as the control group.Clinical data,including Helicobacter pylori (HP) infection,unhealthy living habits,anxiety,depression and regular intake,were collected and compared between the two groups.Results Compared with the control group,the NUP group showed a higher HP infection rate [70.1％ (68/97)vs.54.3％ (63/116),x2 =5.565,P＜0.05],a higher incidence of unhealthy living habits (unhealthy dietary habits,smoking,drinking,and lack of regular exercise) (P＜0.05),a higher incidence of suspect anxiety/anxiety and a higher incidence of regular intake [30.9％ (30/97) vs 10.3％ (12/116),x2=14.138,P＜0.05].SerumpepsinogenⅠ(PGⅠ) [(178.7±13.6) μg/L vs.(125.2±10.5)μg/L,t=1.971,P＜0.01] and serum pepsinogen Ⅱ(PG Ⅱ) [(28.8±5.3) μg/L vs.(14.7±3.8)μg/L,t=1.960,P＜0.01] levels were also higher in the elderly NUD patients than in the control group.Conclusions HP infection,unhealthy living habits,anxiety and/or depression,and regular intake are closely associated with NUD in the elderly.Serum PGⅠ and PGⅡ could be used as markers in screening for malignant lesions in elderly patients with dyspepsia.

Objective:To evaluate the acute oral toxicity , skin irritation and skin allergy of Thuja essential oil ( TEO) , and pro-vide experimental basis for the clinical use of TEO .Methods:The acute oral toxicity was measured by Horn ’ s assay .Totally 40 KM mice were divided into four groups and intragastrically administered with TEO at different dose of 21.50, 10.00, 4.64 and 2.15 g · kg-1 .After the 14-day observation, the death number and toxic manifestations were recorded and observed , and LD50 was calculated by checking the Horn's form of LD50 .The skin irritation test was performed on healthy adult white rabbits .Totally 9 rabbits were divid-ed into 3 groups randomly , and TEO at the concentration of 100%, 50%and 25%was painted on the skin of the rabbits .Edible vege-table oil was used as the negative control .The erythema and edema of the treated skin were evaluated and scored .Delayed skin hyper-sensitivity reaction was used to investigate the allergy of TEO .Totally 30 white guinea pigs were randomly divided into 3 groups:TEO group, the negative control (edible vegetable oil) and the positive group (1%2, 4-dinitrochlorobenzene).After the intracutaneous in-duction stage and local induction stage , TEO was used to activate the hypersensitive reaction .The skin response was observed and scored after the 24-hour and 48-hour activation.Results:The mice in 21.50 g · kg-1 TEO treatment group were all dead , while only a part of the mice in 10.00 and 4.64 g · kg-1 TEO treatment groups were dead , and no mice died in 2.15 g · kg-1 TEO treatment group.According to the Horn's form of LD50 , LD50 of TEO was 9.26 g · kg -1 for male mice and 7.94 g · kg -1 for female mice.The results of skin irritation test indicated the strong irritation effects of TEO .However , the irritation of TEO was reduced after the dilution , and 25%TEO showed no irritation to the skin of rabbits .The results of delayed skin hypersensitivity reaction showed obvious erythema and edema induced by 2, 4-dinitrochlorobenzene , while no obvious erythema and edema were found in TEO treated guinea pigs , indi-cating non-allergic effect of TEO .Conclusion:TEO has strong skin irritation in rabbits , while no obvious oral toxicity in mice and skin allergy in guinea pigs .

Objective:To identify a suitable biomarker for early diagnosis and prognosis of Candida albicans pneumonia ( CAP) ,we investigated the expression of several biomarkers,such as soluble triggering receptor expressed on myeloid cells-1 ( sTREM-1),soluble hemoglobin-haptoglobin scavenger receptor (sCD163),C-reactive protein (CRP),and procalcitonin (PCT),in rabbits with CAP. Methods:A rabbit model was established after immunosuppression of 40 rabbits,randomly divided into 2 groups of 20 each. The experimental group received 1 ml injection of 5×107 cfu/ml C. albicans solution via percutaneous tracheal puncture,while the control group received normal saline. Rabbit blood samples were collected on days 2,3,4,5,6 and 9 post-inoculation and examined for levels of sTREM-1,sCD163,CRP,PCT,interleukin-6 (IL-6),IL-8,IL-10 and tumor necrosis factor-α (TNF-α). Other tests included routine blood examination,arterial blood gas test,chest thin-layer computed tomography on days 3 and 9 post-inoculation,lung tissue biopsy, and blood culture to confirm C. albicans infection. Results:The levels of sTREM-1,SCD163,PCT,and TNF-αwere higher in the exper-imental group as compared to control. Additionally,sTREM-1 and CRP indices showed an upward trend during 9 days of observation period in the experimental group,while others showed a short-term increase after inoculation and then declined gradually. Areas under the receiver operating characteristic curve for CAP diagnosis were calculated as 0. 882,0. 814,0. 685 and 0. 55 for sTREM-1,SCD163, PCT and CRP,respectively. Conclusion: The diagnostic value of biomarkers,sTREM-1 and SCD163,is superior to that of CRP and PCT in the diagnosis of CAP.

Objective To compare the effectiveness and safety of Onyx and n-butyl-2-cyanoacryhte (NBCA) for the embolization of cerebral arteriovenous malformations (AVMs).Methods The clinical data of 53 patients with cerebral AVMs (31 in the NBCA group and 22 in the Onyx group) were analyzed retrospectively.The safety and effectiveness of the 1-year follow-up were compared.The size of AVMs (diameters ＜3 cm,3-6 cm,and ＞6 cm) and the Spetzler-Martin grade were used to conduct subgroup analysis.Results There were no significant differences in the baseline data and AVM morphologies.The embolization rate in the Onyx group was significantly higher than that in the NBCA group (P ＜ 0.05),but there were no significant differences in the incidences of postoperative hemorrhage (1/22 vs.1/31;P=1.000)and neurological deficit (1/22 vs.3/31;P=0.633) in the 1-year follow-up after procedure.The subgroup analysis showed that the embolization rates of the small and medium-sized cerebral AVMs in the Onyx group were significantly higher than those in the NBCA group (all P ＜ 0.05),and the embolization rates of cerebral AVMs with different Spetzler-Martin grades in were significantly higher than those in the NBCA group (all P ＜0.05).Conclusion Onyx is equivalent to NBCA in safety but better in efficacy.

Objective: To evaluate the genetic toxicity of Thuja essential oil by salmonella reversion test (AMES test) and mammal micronucleus test.Methods: TA97, TA98, TA100 and TA102 were used in AMES test to evaluate the mutagenesis of Thuja essential oil.Mouse bone marrow micronucleus test was conducted to assess the chromosome toxicity of the drug.Results: Both in S9 present and absent situations, the numbers of reverse mutation of Thuja essential oil at different doses for the four strains were all less than 1-fold of that of solvent control, and the difference had no statistical significance (P>0.05), suggesting negative mutation.The micronucleus test indicated that Thuja essential oil had no influence on the rate of mouse bone marrow micronucleus (P>0.05).Conclusion: Thuja essential oil shows no obvious genetic toxicity.