Objective: To evaluate the effectiveness of minocycline at subantimicrobial dosage in the treatment of experimentally induced periodontitis in rats.Methods: Periodontitis was induced by silk ligature technique on 4 second molars in each of 16 adult male Sprague-Dawley rats and the animals were fed with 100 g/L sucrose drink. The rats were divided into 2 groups: (1)periodontitis group without treatment;(2)treatment group, the rats with periodontitis were treated by systemic administration of minocycline at 5 mg/(kg?d).Another 8 normal rats were used as the controls. Assessment was carried out at day 28 and 56 using a number of different visual, histological and ultrastructure approaches.Visual assessment included tooth mobility(TM), gingival index(GI), and alveolar bone loss. Histological examination included monocyte effusion,resorption lacunae with osteoclasts and percentage of the periodontal collagen.The collected data were statistically analyzed using variance test.Results: Systemic administration of minocycline at subantimicrobial dosage can significantly reduce GI, TM, resorption lacunae with osteoclasts and alveolar bone loss either at day 28 or at day 56; significantly inhibited monocyte effusion and the collagen degradation in the periodontium at day 56 in rats with periodontitis. Conclusion: Minocycline at subantimicrobial dosage may decrease alveolar bone loss and osteoclasts formation in periodontium with periodontitis.

Drug treatment is one of the most important parts in t he therapeutics of periodontal disease. This review discusses the purpose, signifi cance、pharmacological mechanisms, administration methods and announcements of c linic medication in periodontal disease and summarized clinical commonused drug as well as the reseach progress in drug therapeutics of periodontal disease.

To a certain extent, itemized government subsidies to public hospitals, primarily used for hospital infra-structure and large equipment investments, can alleviate the financial pressure of development expenditures and thus re-duce the medical expenditure burden on patients. To test the hypothesis, the panel data method has been adopted based on the data of 23 tertiary hospitals. Empirical results find that:(1) increases in itemized subsidies will reduce the burden of medical expenses on patients;(2) conversely, the impact of itemized subsidies on outpatient medical expenses is more sig-nificant. By sharing a portion of public hospital expenses and impacting hospital service providing behavior, itemized sub-sidies help to reduce the burden of medical expenses on patients.

Objective To explore the relation among physical exercise,depression among female college students and social support,and the multiple mediation effect of three dimensions of social support between physical exercise and depression.Methods A total of 300 female college students were selected and investigated using the physical activity rating scale-3 (PARS-3),self-rating depression scale (SDS) and social support rating scale(SSRS).The multiple mediation effects of the subjective support,objective support and support utilization were tested using the hierarchical regression and the bias-corrected non parametric percent Bootstrap method.Results The overall effect of multiple mediation was significant,accounting for 56％ of the total effect,while the direct effect of physical exercise on depression was not significant.As for the multiple mediation effects,the mediation effect of subjective support and support utilization was significant,while that of the objective support was not.Their mediation effect accounted for 47.3％,36.6％ and 16.1％ of the indirect effect respectively.Conclusion Social support has a mediation effect between physical exercise and depression among female college students,and the subjective support and support utilization are the main mediation factors.

High grade B-cell lymphoma (HGBL) has been defined as a separate entity in World Health Organization classification in 2016 and is considered to be clinically aggressive. People make continuous analysis of the subgroups and accurate treatments, such as the comparison between the prognosis of HGBL-not otherwise specified and double-hit lymphoma (DHL), transformed and primary DHL, myc partner/bcl-2/bcl-6 translocation, TP53 expression, serum albumin, chemoimmunotherapy, hematopoietic stem cell transplantation, T cells with chimeric antigen receptors therapy, etc. This report will address the progress of HGBL prognosis and therapy in the 58th American Society of Hematology Annual Meeting.

AIM:To investigate the effect of different cutting centers on the visual acuity, refractive diopter and visual quality of patients undergoing laser assisted in situ keratomileusis (LASIK).METHODS: A total of 80 patients (160 eyes) with myopia treated by elective LASIK were divided into two groups.Thirty-six cases (72 eyes) with visual axis corneal reflection point (VACRP) as the cutting center were included into the VACRP group while 44 cases (88 eyes) with pupil center (PC) as the cutting center were included into the PC group.The uncorrected visual acuity (UCVA), the best corrected visual acuity (BCVA), refractive diopter, corneal aberration [total corneal and anterior corneal surface higher-order aberrations (HOA), spherical aberration (Z40), vertical coma (Z3-1), horizontal coma (totZ31) and offset of cutting centers were determined before surgery and 1mo after surgery.RESULTS: There was no difference in the probability of UCVA ≥ 0.1, BCVA and refractive diopter between the two groups at 1mo after surgery (P>0.05).The astigmatism and cutting center deviation of VACRP group were lower than those of PC group (P<0.05).The totHOA, totZ40, totZ3-1, totZ31, froHOA, froZ3-1、froZ31 and froZ40 were lower in VACRP group than PC group at 1mo after surgery (P<0.05).CONCLUSION: The UCVA of patients treated with both cutting centers for LASIK is good but VACRP has more advantages in reducing the offset of cutting center and improving postoperative visual quality.

Adolescent ; Adult ; Aged ; Female ; Humans ; Male ; Middle Aged ; Myelodysplastic Syndromes ; diagnosis ; epidemiology ; Prognosis ; Young Adult

Objective:To investigate hard-tissue changes in borderline cases with extraction and non-extraction during treatment and follow-up stages.Methods:Five associate professors,who were from Peking University School and Hospital of Stomatology,were asked to make judgment on the cases with full pre-treatment records for discriminating the borderline cases from extraction and non-extraction cases.Fifty-four borderline cases with full treatment records which had been out of treatment for at least 2 years were followed.Twenty-one cases with follow-up records were collected including 8 extraction cases and 13 non-extraction cases.Cephalometric measurements were preceeded in IDAS(Image and Database Analysis System) software program.Results:In extraction group,significant changes of SNB,SNPg in A-P direction and that of ArGo/ANSMe,MP/SN in vertical direction were present during the follow-up stage,while the overjet was stable.In non-extraction group,only decrease of proclination of lower incisor and increase of overjet were present without any skeletal changes during the follow-up stage.In comparison of the two groups,no skeletal and dental changes showed statistically significant difference except for MP/SN and ArGoGn in pre-treatment stage,while dental characteristics in relation to upper and lower incisor(L1/NB,L1-NB,L1-AP,U1-AP,U1/L1) showed statistically significant difference between the two groups after treatment.But in follow-up stage,the skeletal and dental pattern tended to be similar for both groups only except for the proclination of lower incisor.Conclusion:The similarities of skeletal and dental pattern are demonstrated in extraction and non-extraction group before treatment.Dental changes are the major post-treatment changes in the two groups.In follow-up stage,counter-clockwise rotation of mandible is unique in extraction group,which is likely a hepful factor for stability of overjet,while lingual tipping of lower incisor in non-extraction group without skeletal changes may contribute to overjet relapse.

Objective To evaluate the clinical efficacy and safety of topical glucocorticoids combined with a moisturizer containing antimicrobial peptides in the treatment of persistent localized eczema. Methods A total of 60 patients with localized eczema were divided into 2 groups. Group 1 topically applied Fuqing gel (an antimicrobial dressing) and hydrocortisone butyrate cream twice a day for 2 weeks, and group 2 topically applied the vehicle of Fuqing gel and hydrocortisone butyrate cream twice a day for 2 weeks. Recovered patients were followed up once every 4 weeks for 12 weeks. Bacterial culture was performed for 5 patients with suspected local Staphylococcus. aureus infection, including 3 patients in group 1 and 2 in group 2, before and after the 2?week treatment. Therapeutic effects were evaluated and compared between the two groups. Results Compared with group 2, group 1 showed a signifi?cantly higher response rate after 1?week treatment(χ2 = 5.455, P < 0.05), but significantly lower eczema area and severity index(EASI)scores after 1? and 2?week treatment(both P < 0.05). Before the treatment, S. aureus was detected in all the 5 patients. After 2?week treatment, S. aureus was undetected in all the 3 patients in group 1, but was still detected in the other 2 patients in group 2. The treatment was rated as ineffective in none of 7 recovered patients in group 1 during the 12?week follow up, but in 2 of 5 recovered patients in group 2 at week 10. Conclusion Fuqing gel combined with glucocorticoid ointment is safe and effective for the treatment of localized eczema, and can be applied in clinic.

Objective To explore the mechanism of lymphotactin(LTN) to exert mucosal adjuvant activity. Methods Complexes of chitosan-pVP1 and chitosan-pLTN were seperately prepared by co-cojugation method, then 50μg(DNA) of each complex was administered intranasally to male BALB/c mice 4times biweekly. Two weeks after the final immunization, mice were challenged with 3LD50 CVB3 to cause viral myocarditis, heart histopathological changes were examined 7 days later. Meanwhile, T cell immune responses, DC percentage and its membrane CD86 expression were monitored in spleen, mesenteric lymph node(MLN) and cervical lymph node(CLN). Results Co-immunizaiton with LTN remarkbly alleviated CVB3-induced cardial injury. This improvement was accompanied with enhanced T cell proliferation and IFN-γ-secreting ability, increased DC frequency and membrane CD86 expression both in spleen and mucosal draining lymph nodes( MLN, CLN). Conclusion LTN exerts its mucosal adjuvant function in augmenting specific T cell immune responses systemically and mucosally via DC enrichment in spleen, MLN and CLN and up-regulation of DC maturation.