Objective:To compare the extent and time course of alveolar bone loss and osteoclast activation in two murine models of periodontal disease:molar ligation and Porphyromonas gingivalis (P.gingivalis) oral inoculation.Methods:A split-mouth design was applied to two groups of mice (C57BL6,6-8 weeks old,n =24 in both groups),resulting in four treatment groups:(1) Control group:unligated upper right 2nd molars receiving CMC only,(2)Ligature group:ligation of a 9-0 suture around the upper left 2nd molar,(3) P.gingivalis group:unligated upper right 2nd molar receiving P.gingivalis challenge only,(4)Ligature ± P.gingivalis group:ligation of the upper left 2nd molar in combination with oral inoculation with 109 colony-forming units(CFU) P.gingivalis.Alveolar bone loss was measured as the cementoenamel junction and alveolar bone crest (CEJ-ABC) distance.In the study,48 C57BL6 mice were designed and treated as described above,and osteoclasts were counted on histological sections following tartrate-resistant acid phosphatase (TRAP) staining and counts were normalized to alveolar bone surface distance.Then 36 C57BL6 mice were investigated,of which 30 were ligated a 940 silk ligature around the 2nd molar in the left maxillary quadrant and 6 were not ligated.After ligation for 1 week,the ligatures in 12 mice were taken off for either 1 week or 2 weeks.The CEJ-ABC distance of the 6 mice without ligation was baseline.The CEJ-ABC distances were measured and analyzed.The data were analyzed with one-way ANOVA.Results:Molar ligation induced marked alveolar bone loss after 3,6,9 and 12 weeks [(0.16 ±0.04) mm,(0.16 ±0.02) mm,(0.18 ±0.03) mm,(0.17 ±0.02) mm],vs.corresponding controls [(0.09 ± 0.03) mm,(0.10 ± 0.01) mm,(0.12 ± 0.04) mm,(0.12 ± 0.01) mm] andP.gingivalisgroup [(0.09±0.03)mm、(0.12±0.01)mm,(0.12±0.02)mm,(0.10± 0.01) mm],P ＜ 0.05.Combined treatment with molar ligation and P.gingivalis did not further increase the CEJ-ABC distance.Evidence for osteoclast activation was found one day after molar ligation,and TRAP-positive cell numbers peaked on day 3 (12 ±4 vs.control 2 ±2,P ＜0.01).After taking off ligature following ligation for 2 weeks,it showed significantly regrowth of alveolar bone compared with that before removal of the ligature on day 7 [(0.07 ±0.02) mm vs.(0.13 ± 0.01) mm,P ＜ 0.01].Conclusion:Molar ligation is a rapid and effective way to induce periodontal bone loss in mice.Osteoclast activation occurs within 24 hours of ligature placement,and the extent of bone loss well exceeds that of the P.gingivalis-induced bone loss.Removing ligature after periodontal disease might help bone regeneration by regrowth of the alveolar bone.

Objective:To detect the distribution of the receptor for advanced glycation end products(RAGE) in gingival tissues of patients with non-insulin dependent diabetes mellitus(NIDDM) accompanying periodontitis.Methods:5 patients with chronic periodontitits(CP) and 4 patients with NIDDM accompanying periodontitis were included. Immunohistochemical staining was performed to detect RAGE and tumor necrosis factor ?(TNF-?) expression in gingival tissues.Interleukin 6(IL-6) and TNF-? levels in gingival crevicular fluid and serum of these patients were examined by ELISA.Results:More RAGE cells were observed in the gingival tissus in the patients of NIDDM with CP than in those of CP(P0.05).Conclusion:RAGE may play a role in the destruction of periodontal tissues in NIDDM patients with CP.

For uncontrolled hemorrhagic shock the traditional method and target of resuscitation may be harmful. The existing data supported a strategy of less aggressive interventions to those shock with uncontrolled hemorrhage until a decisive surgery begin. The choice of liquor for resuscitation remains in controversy. A combined application of crystalloid and colloid liquor seems to be reasonable and may be accepted by most physicians. It should be noted that the new resuscitation strategy may not be suitable to some kinds of trauma, such as traumatic brain injury, and its long-term effects on to the prognosis should be further evaluated.

Excitotoxicity refers to a process of neuronal death caused by excessive or prolonged activation of receptors for the excitatory amino acids, which is related to the overload of intracellular calcium ([Ca2+]i) and mitochondrial depolarization. The well accepted hypothesis that Ca2+ plays a central role in neurotoxicity, and it mediated excitotoxicity is deeply involved in both acute and chronic neurodegeneration suggests that inhibitors of Ca2+ transduction, such as NMDA antagonists, might block the pathological process at an early stage and provide more effective protections.

Objective:To explore the differences of the early response time between transcranial magnetic stimulation (rTMS ) and modified electroconvulsive therapy (MECT )in patients with first-episode depression.Methods:Totally 65 first-episode patients aged 18 -45 year were enrolled in the study.The diagnoses were made according tothe Diagnostic and Statistical Manual of Mental Disorders,Fourth Edition (DSM-Ⅳ)criteria for depression.The patients randomly received rTMS(n =33)or MECT (n =32).All patients received co-therapy of escitalopram (10 -20 mg /day).Stimulation (20 Hz)was performed five times a week for four weeks and,a total of 20 consecutive working days over the left dorsolateral prefrontal cortex(DLPFC).MECT group received MECT treatment 3 times a week for 3 weeks,a total of eight times.The Hamilton Depression Rating Scale-24 items (HAMD)was used to assess the severity of clinical symptoms and reduction rates.Results:Compared with the pa-tients in MECT group,the patients in rTMS group showed a less reduction rates [(25.0.±3.1),(34.4 ±7.7), (52.2 ±7.8),(69.1 ±8.3),vs(28.2 ±5.4),(38.8 ±5.1 ),(57.7 ±6.8),(75.4 ±8.6),Ps <0.05]in the first four weeks and the suicidal behavior scores reduced less in rTMS group in the first two weeks (P <0.05).Conclu-sion:It suggests that both rTMS at 20 Hz and MECT combined with escitalopram could improve the first-episode depression within a week.While the efficacy of rTMS combined with escitaloprm slightly less than MECT com-bined with essitaloprm in rapid response and reducing the suicide risk of acut period.

AIM: To activate hepatic stellate cells (HSC) in vitro in precision-cut liver slices (PCLS) stimulated by acetaldehyde for studying and screening anti-fibrotic drugs. METHODS: PCLS were prepared by the vibratome, and incubated with 700 ?m?L~-1 acetaldehyde for 0, 2, 4 and 6 h. The medium and homogenate were retained to determine glutathione S-transferase (GST) activity, lactate dehydrogenase (LDH) leakage and hydroxyproline (Hyp) content. PCLS were prepared for paraffin sections. The expression of ?-smooth muscle actin (?-SMA) was evaluated by immunohistochemistry, and the result was analyzed with image analysis software. RESULTS: The leakages of GST and LDH were increased significantly compared with those in 0 h group (P

Objective We summarized the nursing care experience of spinal muscular atrophy complicated with pneumonia.Methods The measures of nursing care to the 9 children patients were comprised of preventing sputum blockage; preventing suffocating due to milk choking; paying special attention to the time being when the sputum blockage and milk choking occurred; early detection of paralysis of respiratory muscle; and training nursing skills to the families,and so on.Results All 9 children patients were cured and discharged from hospital.Conclusions The measure of targeting nursing intervention to the children with infantile spinal muscular atrophy and pneumonia could improve therapeutic effect and reduce mortality rate.

A simple and sensitive assay for rapid detection of human coronavirus NL63 (HCoV-NL63) was developed by colorimetic reverse transcription loop-mediated isothermal amplification (RT-LAMP). The method employed six specially designed primers that recognized eight distinct regions of the HCoV-NL63 nucleocapsid protein gene for amplification of target sequences under isothermal conditions at 63 degrees C for 1 h Amplification of RT-LAMP was monitored by addition of calcein before amplification. A positive reaction was confirmed by change from light-brown to yellow-green under visual detection. Specificity of the RT-LAMP assay was validated by cross-reaction with different human coronaviruses, norovirus, influenza A virus, and influenza B virus. Sensitivity was evaluated by serial dilution of HCoV-NL63 RNA from 1.6 x 10(9) to 1.6 x 10(1) per reaction. The RT-LAMP assay could achieve 1,600 RNA copies per reaction with high specificity. Hence, our colorimetric RT-LAMP assay could be used for rapid detection of human coronavirus NL63.
Colorimetry ; methods ; Coronavirus Infections ; diagnosis ; virology ; Coronavirus NL63, Human ; genetics ; isolation & purification ; DNA Primers ; genetics ; Humans ; Nucleic Acid Amplification Techniques ; methods ; Reverse Transcription ; Sensitivity and Specificity

Objective To evaluate the postoperative related aesthetic parameters and satisfactory degree between CT 3D reconstruction augmentation rhinoplasty with silicone and augmentation rhinoplasty with silicone in adult Han women.Methods Totally 60 adult healthy Han women voluntarily subjected to augmentation rhinoplasty with silicone were randomly divided into groups A and B,30 people each group;Row CT 3D reconstruction augmentation rhinoplasty with silicone was performed in group A,and the augmentation rhinoplasty with silicone in group B;6 months after surgery related data measurement and questionnaire collected,we compared the objective and subjective indicators for the nasal root,dorsum and ministry,respectively.Results There was a difference between group A and group B in the nasorostral angle,the nasal facial angle,the asofrontal angle and the height of the nasal root (89.50±1.40)°,(28.85±2.20)°,(136.26±1.92)°,(6.45±0.27) mm in group A,and (85.40±3.70)°,(26.43±4.39)°,(138.88±4.78)°,(5.28±0.34) mm in group B (all P＜0.05).There was a difference between group A and group B in operation time (51.77 ± 5.35) min vs (29.83±5.76) min (P＜0.05).Conclusions Owing to its preoperative prosthesis design purpose and avoiding local swelling,CT 3D reconstruction augmentation rhinoplasty with silicone has better effects than that of augmentation rhinoplasty with silicone,especially on the nasal dorsum and the nasal root),which can obviously shorten the operation time,and therefore it is more suitable for the defects of the nasal root and dorsum.

Objective:To evaluate the cognitive level of nursing professionalism quantitatively and analyze its influencing factors, so as to provide research evidences for improving nursing professionalism. Method:A question-naire survey was conducted among 741 nurses from 7 public class A tertiary hospitals in Guangdong and Hubei Province. Descriptive statistics and multiple stepwise linear regressions were adopted using total score and scores of five dimensions of nursing professionalism scale as dependent variables. Results: Total score of professionalism cognitive level was (83. 41 ± 8. 75). The five dimensions of participation in professional organization, public health philosophy, peer review philosophy, professional sense of mission and autonomy were(16. 04 ± 2. 64), (17. 25 ± 2. 89), (16. 93 ± 2. 45), (17. 82 ± 3. 13), (15. 38 ± 2. 58), separately. There were mainly 5 factors influencing nursing professionalism cognitive level, namely gender, admission volunteer, first academic qualifications, employ-ment type, and whether receiving nursing award in past 3 years. Conclusion:Cognitive level of nursing profession-alism of sample nurses in 7 class A tertiary hospitals is similar to that of American nurse, but lower than that of Ko-rean - American nurses. And it is related to basic demographic characteristics, education background, practice status, enthusiasm of participating in the professional activities.