Genotype ; Humans ; Streptococcal Infections ; diagnosis ; microbiology ; Streptococcus agalactiae ; genetics

ObjectiveTo compare therapeutic effects of the bone-guided tissue regeneration in combination with a composite bovine-derived xenograft versus flap surgery only on intra-bony defects in elderly patients with periodontal disease. MethodsThirty elderly patients with periodontal disease were randomly divided into two groups. One group was treated by the bone-guided tissue regeneration in combination with a composite bovine-derived xenograft (experimental group). The other group was treated by flap surgery only (control group). Probing depth (PD)and clinical attachment level (AL) were determined before surgery and six months after treatment in two groups. The change of bone amount was also determined before surgery and six months after treatment through computer-assisted densitometric image analysis(CADIA). ResultsThe changes of PD and CADIA were (3.8+1.7)mm, (20. 3+11.1)g/mm2 in experimental group and were (2.5+1.1)mm, (9.4+8. 6)g/mm2 in control group. The differences between two groups were significant (P.＜0. 05). The change of AL was (3.5+ 1.6)mm in experimental group, compared with control group(2. 3 1.7)mm, which showed more obvious regeneration of alveolar bone (P＜ 0. 01). ConclusionsGuided tissue regeneration in combination with a composite bovine-derived xenograft appears to be more effective than flap surgery only for intra-bony defects in elderly patients with periodontal disease.

Objective To ascertain serum inflammatory markers could be modified following treatment of periodontal disease in elderly patients. Methods The probing depth (PD), clinical attachment level (AL), C-reactive protein (CRP), interleukin-6 (IL-6) were determined. And then fifty-two elderly periodontitis patients underwent a standard phase of non-surgical periodontitis treatment (consisting of oral hygiene instructions and subgingival scaling and root planning). After three and six months, PD, AL, CRP and IL-6 were determined again and compared to the baseline. Results Six months after treatment, significant reductions in PD [(5.9±1.1) mm vs. (6.8±1.0) mm, P＜0.05], AL [(1.3±0.9) mm vs.(8.4±1.1) mm, P＜0.05], CRP [(1.5±0.2) mg/L vs. (2.0±0.3) mg/L, P＜0.01] and IL-6 [(1.6±0.5) ng/L vs. (1.9±0.4) ng/L, P＜0.05] were observed. Conclusions Treatment of chronic periodontitis can decrease the levels of serum inflammatory markers in elderly patients.

In this study,we isolated and characterized chlorobenzene degrading bacteria from the effluent and sludge samples of one chemical plant.Minimal medium supplemented with chlorobenzene as sole car-bon source was used during the enrichment and domestication process.Seven major bacterial isolates were obtained and purified.Their 16S rRNA genes were amplified by PCR for sequencing and their identities were determined with homology comparisons.Five of the seven isolates belong to Actinomycetales in-cluding Kocuria KD139,Rhodococcus KD140,Rhodococcus KD142,Arthrobacter KD230,and Ar-throbacter KD232;one is classified as Bacillus d KD178;and another one as Stenotrophomonas KD237.The phylogenetic tree was also constructed based on the analysis of 16S rRNA gene sequences.Chloro-benzene concentrations were quantified with gas chromatography to investigate the bio-degradation rates of the isolated strains.Stenotrophomonas KD237 degraded 60.78% chlorobenzene in the minimal medium within 24 h.

Objective To evaluate the effect of continuous renal replacement therapy (CRRT) on extracorporeal membrane oxygenation (ECMO)-induced expression of inflammatory factors in pig kidney.Methods Twenty-four adult pigs of either sex,weighing 25-32 kg,were randomly divided into 4 groups (n =6 each) using a? random number table:control group (group C),sham operation group (group S),ECMO group and CRRT group.Anesthesia was induced with ketamine,diazepam and atropine and maintained with ketamine and diazepam.The pigs were tracheotomized,intubated and mechanically ventilated.The left femoral arteries were cannulated for MAP monitoring.Heparin 150 U/kg was injected intravenously.Right femoral artery and left internal jugular vein were cannulated for blood-letting and fluid infusion.In ECMO and CRRT groups,ECMO was performed for 24 h starting from 1 h after cannulation,in addition CRRT was performed for 24 h simultaneously in ECMO group.The pigs were then sacrificed and kidney specimens were obtained for determination of the content of interleukin-1β (IL-1 β),IL-6 and tumor necrosis factor-α (TNF-α) by ELISA.Results There was no significant differ-ence in the content of IL-1β,IL-6 and TNF-α between C and S groups (P ＞ 0.05).Compared with C and S groups,the content of IL-1β,IL-6 and TNF-α was significantly increased in E and CRRT groups (P ＜ 0.01).Compared with group E,the content of IL-1β,IL-6 and TNF-α was significantly decreased in group CRRT (P ＜0.01).Conclusion CRRT can decrease ECMO-induced expression of inflammatory factors in pig kidney to some extent,indicating that it can alleviate the inflammatory responses in kidney.

0.05). At 4 and 20 h,the RR in the S group was significantly lower than that in the T group (P

In order to study the in vitro culture and expansion of bone marrow mesenchymal stem cells in rats (rMSCs) and the possibility of rMSCs differentiation into retinal neural cells, the bone marrow-derived cells in SD rats were isolated and cultured in vitro. The retinal neural cells in SD rats were cultured and the supernatants were collected to prepare conditioned medium. The cultured rMSCs were induced to differentiate by two steps. Immunofluorescence method and anti-nestin, anti-NeuN, anti-GFAP and anti-Thy1.1 antibodies were used to identify the cells derived from the rMSCs. The results showed that the in vitro cultured rMSCs grew well and expanded quickly. After induction with two conditioned media, rMSCs was induced to differentiate into neural progenitor cells, then into retinal neural-like cells which were positive for nestin, NeuN, GFAP and Thy1.1 detected by fluorescence method. The findings suggested that rMSCs could be culture and expanded in vitro, and induced to differentiate into retinal neural-like cells.
Animals, Newborn ; Bone Marrow Cells/*cytology ; Cell Differentiation/*physiology ; Cells, Cultured ; Mesenchymal Stem Cells/*cytology ; Neurons/*cytology ; Rats, Sprague-Dawley ; Retina/*cytology

Objective To study the effect of continous subcutaneous insulin infusion (CSII) and mutiple subcutaneous insulin infusion (MSII) on type 2 diabetes mellitus during perioperation. Methods One hundred and eighty surgical patients complicated with Type 2 diabetes were randomly divided into two groups,98 cases in the CSII group (treated with CSII of novolin R) and 82 cases in the MSII group (treated with MSII of novolin R and no-volin N). Blood glucose level,the time to reach normal blood glucose level, the average dosage of insulin, the inci-dence of hypoglycemic,infection rate of incisions and inpatient days were measured in two groups before and after treatment. Results The level of fasting blood glucose after treatment in the CSII group (4.8 mmol/L (SD: 1.6)) was significantly lower than that of the MSII group (6.4 mmol/L(SD :2.1)) (t = 7.74,P < 0.05), and 2-h glucose in the CSII group (7.6 mmol/L(SD :2.3)) was significantly lower than that of the MSII group (9.3 mmol/L(SD: 2.4)) (t = 7.72, P < 0.05). The time to reach normal blood glucose level in the CSII group (4.1 days (SD: 2.9)) was shorter than that of MSII group (6.9 days (SD :2.0)) (t=2.81, P < 0.05). The average dosage of insulin in the CSII group (40.7 U(SD: 10.3)) was lower than that of the MSII group (63.2 U (SD: 17.0)) (t=3.57, P <0.05). The incidence of hypoglycemic in the CSII group (3.05%) was lower than that of the MSII group (9.20%) (χ~2 = 4.92,P < 0.05). The infection rate of incisions in the CSII group (0.0%) was lower than that of the MSII group (10.9%) (χ~2 =4.18, P < 0.05). The inpatient days in the CSII group (15.3 days (SD :7.2)) was shorter than that of the MSII group (22.5 days (SD :9.7)) (t = 3.12, P < 0.05). Conclusions Compared to multiple sub-cutaneous insulin infusion, continuous subcutaneous insulin infusion is more effective in controlling blood glucose, hypoglycemic and incision infection, thus is recommend to perioperative patients complicated with type 2 diabetes mellitus.

Antineoplastic Agents ; administration & dosage ; Antineoplastic Combined Chemotherapy Protocols ; therapeutic use ; Costs and Cost Analysis ; Drug Prescriptions ; statistics & numerical data ; Drugs, Chinese Herbal ; administration & dosage ; Humans ; Materia Medica ; Neoplasms ; drug therapy ; Nonprescription Drugs ; therapeutic use

BACKGROUND: As magnetic resonance (MR) contrast, a large number of clinical and experimental researches have been done on superparamagnetic iron oxide (SPIO), while the report on the labeled cell passaged cells is rare.OBJECTIVE: MR imaging was performed to the labeled bone mesenchymal stem cells (BMSCs) and its passaged cells in vitro, in order to establish the base of monitoring magnetic labeled BMSCs with magnetic resonance imaging (MRI) in vivo.DESIGN, TIME AND SETTING: The cytological in vitro experiment was performed at the Imaging Research Institute and Institute of Rheumatology and Immunology of North Sichuan Medical College Hospital from June 2006 to January 2007. MATERIALS: Two clean female albino rats (Animal Center, North Sichuan Medical College), SPIO (Schering AG,Germany) were used in this study.METHODES: Bilateral femur and tibia bone marrow was extracted from rats. BMSCs were harvested and purified using the adherent method, and then labeled with 600 μL ferric oxide-polylysine compound (42 mg/L iron concentration) in vitro. MAIN OUTCOME MEASURES: Cell maker-positive rate and the MR signal intensity were respectively measured to the labeled cells and its passaged cells under the inverted microscope and magnetic resonance imaging. RESULTS: Following Prussian blue staining, labeling rate of SPIO labeled cells at the first passage was 100%. With increased passage, the labeling rate was reduced from the first to fifth passages. Compared with non-labeled PBS control, there was no significant difference in signal intensity in the first and second passages cells, but the signal intensity percentage was gradually decreased with signal intensity of increased cell passage from the third passage. Cell labeling rate was negatively correlated with T2~*WI signal intensity (r=-0.986 6, P <0.005). CONCLUSION: The iron particles in the magnetic labeled cells can be passaged to the offspring cells, and can be monitored in a certain period of time with MRI in vitro. These results firstly introduced that SPIO-labeled cell iron particles can decrease with cell passage.