Objective:To observe the effects of nicotine on the proliferation and fibronectin(Fn) synthesis of human periodontal ligament cells(PDLCs) cultured in vitro,and to investigate the mechanism of the effects of smoking on the periodontitis.Methods:PDLCs were cultured in the presence of nicotine at various concentrations,the proliferation of cells was measured by MTT chromatometry,and the synthesis of Fn was measured by ELISA and reverse transcription-polymerase chain reaction(RT-PCR).Results:①MTT chromatometry:Nicotine inhibited the proliferation of PDLCs obviously(P

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Objective To evaluate the efficacy of the nasopharyngeal airway for airway management during anesthesia recovery in obese patients. Methods Eighty ASA Ⅰ-Ⅲ patients, aged 48-72 yr, body mass index > 30 kg/m~2 , were randomly divided into 2 groups (n=40 each) : nasopharyngeal airway group (group Ⅰ) and oropharyngeal airway group (group Ⅱ). The extubation was performed after recovery of breathing (RR ≥ 10 bpm, V_T≥5 ml/kg). The nasopharyngeal airway was inserted though the nasal cavity immediately after extnhation in group Ⅰ, and the oropharyngeal airway was inserted though the oral cavity after extubation in group Ⅱ. Oxygen (3 L/min) was then inhaled by mask until recovery of consciousness in both groups, and if SpO_2 < 90%, the rescue medication was given. The changes in RR, SpO_2 , HR, SP and DP were observed at 1 min (T_1), 5 min (T_2), 10 min (T_3) and 20 min (T_4) after insertion of the airway and complications were recorded in 20 min after insertion of the airway. Results The RR, SpO_2, HR, SP and DP were all maintained in the normal range after insertion of the airway in both groups. The RR,HR, SP and DP at T_(3,4) and incidence of resdessness, nausea and vomiting, and laryngospasm were significantly lower in group Ⅰ than in group Ⅱ (P<0.05), while there was no significant difference in SpO_2 at each time point between group Ⅰ and group Ⅱ(P>0.05). Conclusion The efficacy of the nasopharyngeal airway is similar to that of the oropharyngeal airway for the relief of the upper respiratory tract obstruction during anesthesia recovery in obese patients, but the stress response induced is lower and complications are fewer.

Objective To observe the outcomes of satellite ganglion block(SGB)via posterior edge of stcmoclcidomastoid approach.Methods SGB was performed in 2 400 patients,who wererandomly divided into two groups with l 200 cases each.The puncture of SGB in group SPA was via posterior edge of sternocleidomastoid approach and that in group TPA via traditional paratracheal approac}L The same local anesthetics was used in two groups.The success rate(Horner'S syndrome appearance)and complications were compared.Results The success rate was higher in group SPA than that in group TPA(97% VS.92%)(P<0.05).Repeated puncture was needed in 16 cases ingroup SPA,which were less than 98 cases in group TPA(P<0.05).Laryngeal nerve block wasoccurred in 24 cases in group SPA.which were less than 37 cases in group TPA(P<0.05).Conclusion Compared to the traditional paratracheal approach,SGB via posterior edge ofsternocleidomastoid approach has the advantages of clear positioning,easy puncture,higher success rate and less complications.

Objective Hepatitis-associated aplastic anemia( HAAA) is a rare and severe disease that can be fatal,if left untreated. In the childhood,it is a syndrome in which marrow failure follows the develop-ment of hepatitis. The aim of this study was to summary clinical characteristic of children with HAAA. Methods We retrospectively reviewed the hospital records of 7 children with HAAA from 2001 to 2010,and summarized and classified the clinical features of HAAA,the laboratory characteristics in 7 patients with com-bined aplastic anemia and severe hepatits,the immune status of those patients,the pathogen of those patients and the results of treatment. Results The average age of patients was 11. 1 years old(8~14 years old). The clinical features were similar in all cases. The early stage of disease,all the children had markedly elevated liver enzyme levels and peripheral blood count was normal. After symptomatic treatment,the hepatic function began to recover but appeared pancytopenia. Bone marrow biopy showed hypoplasia. The median time from onset of hepatic symptoms until diagnosis of aplasic anemia was 43. 3 days. All the children had immune dis-order. Only one boy showed parovirus B19-IgM positive and another girl was diagnosed as acute HAV hepati-tis,the pathogen results of other children were negative. All the patients were treated by immunosuppressive therapy,one patient gave up due to some reasons and others had completed remission. Conclusion HAAA is a life-threatening hematologic disorder in which an episode of hepatitis precedes AA by a period of weeks or months. Characteristically,the HAAA syndrome is more prevalent among young men. It is reported that it is in a higher frequency of patients with non-A,non-B hepatitis. Clincal features and experimental results strong-ly suggest a central role for an immune-mediated pathogenesis. The main treatment is immunosuppressive therapy,which include hormone,antithymocyte glubulin and cyclosporine.

Objective To investigate the incidence of the pusher syndrome in stroke patients, and the relationship between the syndrome and the neuropsychological symptoms and location of brain lesion, and to investigate the mechanism and the physiotherapy intervention of pusher syndrome. Methods Thirty nine patients(25 male, 14 female, 62.5?9.4 years old) with pusher syndrome were examined, 91 patients(57 male,34 female, 58.4?11.6 years old) without ipsilateral pushing served as control. The lesion areas, neuropsychological syndrome and the Barthel Index(BI) were recorded, and the physiotherapy were administered in the patients. Results The incidence of pusher syndrome was 30% in the patients studied, corresponding to 17% of the total number of stroke patients in the study period. The percentage of pusher syndrome occurrence was higher in the patients with right side lesion than those with left side lesion ( P

Objective To determine the localization of iRhom2 and its mutant proteins of Uncv mice in Vero cells by PKH26 combined with Hoechst 33258 staining.Methods The cell membrane was stained with PKH26, and the nuclei were stained with Hoechst 33258 dye, and observed by laser scanning confocal microscopy.Results It was found that wild iRhom2 was distributed in the cytoplasm, and its iRhom2mut was present both in cytoplasm and cell nuclei.Conclusions The results of our study suggest that a deletion in N-terminal of iRhom2 affects its subcellular localization.

Objective To evaluate the influence of different field-strength magnets(1.5 T and 3.0 T)on MRI artifacts caused by Ni-Cr alloy fixed prostheses.Methods The crown,bridge and upper denture fixed prostheses with different thickness were produced by Ni-Cr alloy as test samples,and were one by one put on the centre of water phantom for MR scanning with different field-strength magnets(1.5 T and 3.0 T).The artifact areas on these two field-strength magnets were measured and statistically compared.The plastic prostheses with the same shape and thickness as the test samples were served as controls.Results Ni-Cr alloy fixed prostheses could cause MRI artifacts,and the artifact areas increased with the mass of prostheses.However,no artifact area was found in controls.Compared with those on 1.5 T magnet,the MRI artifact areas significantly increased on 3.0 T magnet(P

Abstract: Objective To explore the relationship between peripheral blood and pleural effusion tuberculosis (TB) infection effector T cells, and to further evaluate the value of combined pleural effusion adenosine deaminase (ADA) for rapid diagnosis of tuberculous pleurisy. Methods The test data of 80 cases of tuberculous pleurisy and 70 cases of nontuberculous pleurisy treated in the Sixth People's Hospital of Nantong City from January 2017 to December 2020 were analyzed. The TBinfected effector T cells were also detected simultaneously in the peripheral blood and the pleural effusion by the T-SPOT technique, and the pleural effusion ADA was detected by the rate method. The subject operating characteristic curve (ROC) was applied to take the optimal pleural effusion ADA threshold to compare the sensitivity and specificity of different critical values. Person phase analysis was applied to analyze the correlation between peripheral blood and pleural effusion T-SPOT.TB. Data of peripheral blood, pleural effusion T-SPOT.TB and ADA were integrated. Results When pleural effusion ADA>45 U/L, the sensitivity and specificity for the diagnosis of tuberculous pleurisy were 50.0% and 94.3%, respectively; when ADA > 25.15 U/ L, the sensitivity and specificity were 80.0% and 72.9%. When ADA > 45 U / L, pleural/ blood T-SPOT.TB spot ratio (spot forming cells, SFCs) > 2 times, the specificity for the diagnosis of tuberculous pleurisy was 100% (highest); when 25.15 U/L< pleural effusion ADA ≤ 45 U/L, pleural/blood T-SPOT.TB spot ratio > 2 times, the specificity for the diagnosis of tuberculous pleurisy was 92.3% (second). When pleural effusion ADA ≤ 25.15 U/L, and the pleural effusion/blood T-SPOT.TB spot number ratio > 2 times, with 83.3% specificity (the lowest of the three groups). Conclusions The level of pleural effusion ADA is one of the most used methods for diagnosing tuberculous pleurisy. Further combination of pleural effusion and blood T-SPOT.TB, if the ratio of pleural effusion / blood T-SPOT. TB spots is greater than 2 times, it can further improve the diagnosis rate of tuberculous pleurisy.

Objective To compare the monosaccharide composition and molar ratio of GL-PPT2, GL-PPT3, and GL-PPT4, which are three polysaccharide peptides isolated from the fruit body of Ganoderma lucidum. Methods The polysaccharide peptides were hydrolyzed by triflouroacetic acid, then derivatized by trichloro-aldehyde-1-pheny-3-methyl-5-pyrazolone (PMP), and determined by HPLC method with the 245 nm detection wavelength. Gradient elution with the solution of KH2PO4 (pH 5.0)-acetonitrile (83.5∶16.5) resulted in baseline separation of nine monosaccharides, of which the chromatographic peaks were very clear. Results GL-PPT2, GL-PPT3, and GL-PPT4 comprise the nine monosaccharides of mannose, ribose, rhamnose, glucose, galactose, arabinose, xylose, galactose, and glucuronic acid. Conclusion The ribose in polysaccharide peptides of G. lucidum is first reported.