Objective:To analyze the concentration of formic acid,propionic acid and butyric acid in gingival crevicular fluid(GCF)of patients with stages Ⅲ and Ⅳ periodontitis,and their relationship with periodontitis.Methods:The study enrolled 37 systemically healthy patients with periodontitis and 19 healthy controls who visited Department of Periodontology,Peking University School and Hospital of Sto-matology from February 2008 to May 2011.Their GCFs were collected from the mesial-buccal site of one molar or incisor in each quadrant.Periodontal clinical parameters,including plaque index(PLI),probing depth(PD),bleeding index(BI),and attachment loss(AL).Concentrations of formic acid,propionic acid and butyric acid in the supernatant of the GCFs were analyzed by high-performance capil-lary electrophoresis(HPCE).The prediction ability of formic acid,propionic acid and butyric acid with the risk of periodontitis and the differences between grade B and grade C periodontitis were analyzed.Results:In this study,32 patients with stage Ⅲ and 5 patients with stage Ⅳ were enrolled,including 9 patients with grade B and 28 patients with grade C.Clinical periodontal variables in the patients with pe-riodontitis were significantly higher than those in the control group(P＜0.001).Formic acid was signifi-cantly lower in periodontitis than that in the control group[5.37(3.39,8.49)mmol/L vs.12.29(8.35,16.57)mmol/L,P＜0.001].Propionic acid and butyric acid in periodontitis were significantly higher than those in the control group:Propionic acid,10.23(4.28,14.90)mmol/L vs.2.71(0.00,4.25)mmol/L,P＜0.001;butyric acid,2.63(0.47,3.81)mmol/L vs.0.00(0.00,0.24)mmol/L,P＜0.001.There was no significant difference in formic acid,propionic acid and butyric acid concentrations between grade B and grade C periodontitis(P＞0.05).Propionic acid and butyric acid in the deep pocket were significantly higher than in the shallow pocket,while the concentration of formic acid decreased with the increase of PD.Propionic acid(OR=1.51,95％CI:1.29-1.75)and butyric acid(OR=3.72,95％CI:1.93-7.17)were risk factors for periodontitis,while formic acid(OR=0.87,95％CI:0.81-0.93)might be a protective factor for periodontitis.Propionic acid(AUC=0.852,95％CI:0.805-0.900),butyric acid(AUC=0.889,95％CI:0.841-0.937),f(formic acid,AUC=0.844,95％CI:0.793-0.895)demonstrated a good predictive capacity for the risk of periodontitis.Conclusion:The concentration of formic acid decrease in the GCF of periodontitis patients,which is a protective factor for periodontitis,its reciprocal have good predictive capacity.However,propionic acid and butyric acid increase,which are risk factors for periodontitis and have good predictive capacity.The concentration of formic acid,propionic acid,and butyric acid vary with probing depth,but there is no significant difference between grade B and grade C periodontitis.

Objective:To observe the effects of different intervention schemes on the expression of adhesion-related cytokines, menstrual recovery and clinical outcome of patients after transcervical resection of adhesion (TCRA) .Methods:180 patients received TCRA in our hospital from Feb. 2022 to Feb. 2023 were divided into group A, group B and group C according to different post-operative intervention programs, with 60 patients in each group. Patients in group A were treated with artificial cycle of estrogen and progesterone after surgery. On this basis, patients in group B were placed with a uterine birth control ring, and patients in group C were injected with sodium hyaluronate gel into the uterine cavity. The grade of uterine cavity adhesion, improvement rate of menstruation and pregnancy outcome at 2 months after operation and pregnancy outcome within 1 year after surgery were compared between the three groups at 2 months after operation. The relative mRNA expression of endometrial tissue transforming growth factor β1 (TGF-β1), platelet-derived growth factor BB (PDGF-BB), tissue inhibitor of matrix metalloproteinase-1 (TIMP-1) and basic fibroblast growth factor (bFGF) at uterine cavity adhesion in each group were detected and compared.Results:At 2 months after surgery, the uterine adhesion rates in group A, group B, and group C were 43.33%, 15.00%, and 11.67%, respectively. There was no significant difference in the uterine adhesion rates between group B and group C ( P>0.05), but they were significantly lower than those in group A ( P<0.05) ; Meanwhile, the degree of intrauterine adhesions in group B and group C was significantly milder than that in group A ( P<0.05). The menstrual improvement rates of group A, group B, and group C at 2 months after surgery were 76.67%, 93.33%, and 96.67%, respectively. There was no significant difference between group B and group C ( P>0.05), but they were all significantly higher than group A ( P<0.05). At 2 months post surgery, the relative expression levels of TGF-β1, PDGF-BB, TIMP-1, and bFGF mRNA in the endometrial tissue at the site of uterine adhesions in group A were 0.77±0.26, 0.58±0.27, 0.54±0.15, and 0.62±0.14, respectively. In group B, they were 0.37±0.16, 0.37±0.14, 0.26±0.11, and 0.29±0.10, respectively. In group C, they were 0.32±0.16, 0.21±0.09, 0.27±0.08, and 0.34±0.18, respectively. The relative expression levels of cytokines in each group were significantly lower than during surgery ( P<0.05). There was no significant difference in the relative expression levels of various cytokines mRNA between group B and group C at 2 months after surgery ( P>0.05), but both were significantly lower than group A ( P<0.05). The pregnancy success rates within 1 year after surgery in group A, group B, and group C were 40.00%, 55.00%, and 58.33%, respectively. The pregnancy success rate in group C was significantly higher than that in group A ( P<0.05) . Conclusions:The application of metauterine contraceptive ring or sodium hyaluronate gel on the basis of estrogen and progesterone treatment after TCRA can effectively prevent postoperative re-adhesion of patients with intrauterine adhesions, improve clinical symptoms, and reduce the expression level of adhesion cytokines. The effects of the two schemes are equivalent.

Objective:To compare the predictive values of response evaluation criteria in lymphoma (RECIL)2017 and Lugano classification for the prognosis of patients with diffuse large B-cell lymphoma(DLBCL) at the end of treatment.Methods:A total of 107 patients (50 males, 57 females, age (49.3±17.4) years) with DLBCL who underwent PET/CT at the end of chemotherapy in the Fourth Hospital of Hebei Medical University between February 2014 and December 2021 were analyzed retrospectively. The RECIL2017 and Lugano classification were used to evaluate the response. Kaplan-Meier survival analysis was used to evaluate progression-free survival (PFS) and overall survival (OS). The Kappa test was used to evaluate the consistency of the two criteria after chemotherapy, and ROC curve (Delong test)was used to compare the predictive values of the two criteria for PFS and OS. Results:The median follow-up time was 47.5(33.4, 57.5) months. Kaplan-Meier analysis showed that the 5-year PFS rates (74.5%(35/47), 71.4%(15/21), 57.1%(12/21), 4/18; χ2=38.85, P<0.001) and OS rates (89.4%(42/47), 81.0%(17/21), 61.9%(13/21), 7/18; χ2=29.52, P<0.001) in complete metabolic response (CMR), partial metabolic response (PMR), no metabolic response (NMR) and progressive metabolic disease (PMD) groups evaluated by Lugano classification were statistically different, as well as those in complete response (CR), partial response (PR), minor response (MR), stable disease (SD) and progressive disease (PD) groups evaluated by the RECIL2017 (5-year PFS rates: 76.9%(40/52), 8/12, 6/11, 6/12, 30.0%(6/20), χ2=29.05, P<0.001; 5-year OS rates: 90.4%(47/52), 8/12, 6/11, 9/12, 45.0%(9/20), χ2=23.63, P<0.001). The RECIL2017 and Lugano classification had good consistency in the efficacy evaluation of DLBCL patients at the end of chemotherapy (70.1%(75/107); Kappa=0.57, P<0.001). The AUCs of Lugano classification for predicting PFS and OS were 0.730 (95% CI: 0.625-0.834, P<0.001) and 0.908 (95% CI: 0.845-0.970, P<0.001) respectively, and those of RECIL2017 were 0.717 (95% CI: 0.612-0.822, P<0.001) and 0.880 (95% CI: 0.812-0.949, P<0.001). The AUCs of the Lugano classification for PFS and OS were slightly higher than those of RECIL2017, without significant differences ( z values: 0.44, 1.09, both P>0.05) . Conclusion:Both RECIL2017 and Lugano classification can evaluate the prognosis of patients with DLBCL at the end of treatment, and Lugano classification is more accurate.

The Genome Sequence Archive (GSA) is a data repository for archiving raw sequence data, which provides data storage and sharing services for worldwide scientific communities. Considering explosive data growth with diverse data types, here we present the GSA family by expanding into a set of resources for raw data archive with different purposes, namely, GSA (https://ngdc.cncb.ac.cn/gsa/), GSA for Human (GSA-Human, https://ngdc.cncb.ac.cn/gsa-human/), and Open Archive for Miscellaneous Data (OMIX, https://ngdc.cncb.ac.cn/omix/). Compared with the 2017 version, GSA has been significantly updated in data model, online functionalities, and web interfaces. GSA-Human, as a new partner of GSA, is a data repository specialized in human genetics-related data with controlled access and security. OMIX, as a critical complement to the two resources mentioned above, is an open archive for miscellaneous data. Together, all these resources form a family of resources dedicated to archiving explosive data with diverse types, accepting data submissions from all over the world, and providing free open access to all publicly available data in support of worldwide research activities.

Objective To assess the effect of silent mating type information regulation 2 homolog 6 (SIRT6) on migratory and proliferative activity of skin fibroblasts in the elderly,and to explore their mechanisms.Methods Circumcised foreskins were obtained from patients of different ages in Department of Urologic Surgery,Second Hospital of Shanxi Medical University,including 8 elderly patients and 8 young patients.Human skin fibroblasts were isolated from the foreskin tissues by using a collagenase digestion method.Western blot analysis was performed to determine the expression of SIRT6 and phosphorylated p65 (p-p65) in human skin fibroblasts in different age groups,scratch assay to evaluate cell migratory activity,and cell counting kit-8 (CCK8) assay to assess cellular proliferative activity.Skin fibroblasts in the elderly group were divided into 2 groups:SIRT6 group transfected with a lentiviral vector overexpressing SIRT6,and control group transfected with an empty lentiviral vector.Then,the cell migratory and proliferative activity as well as p-p65 expression were measured by the above methods,and the mRNA expression of type Ⅰ and Ⅲ collagens,and integrin subunits α3,α5 and β1 was determined by real-time PCR in the SIRT6 group and control group.Statistical analysis was carried out with GraphPad Prism 5 software by using t test for comparison between 2 groups.Results Compared with the young group,the elderly group showed significantly decreased SIRT6 expression in skin fibroblasts (0.434 ±0.179 vs.1.000 ± 0.067,t =3.040,P =0.012),migration rate (43.81％ ± 18.84％ vs.94.63％ ± 12.32％,t =5.903,P =0.003)and cellular proliferative activity at 24 and 48 hours (both P ＜ 0.05),but significantly increased p-p65 expression (1.694 ± 0.148 vs.1.000 ± 0.093,t =2.949,P =0.015).Compared with the control group,the SIRT6 group showed significantly decreased p-p65 expression (P ＜ 0.05),but significantly increased migratory and proliferative activity (both P ＜ 0.05),and elevated mRNA expression of type Ⅲ collagen and integrin subunits oα3,α5 and β1 (all P ＜ 0.05).Conclusion SIRT6 can improve the migratory and proliferative activity of human fibroblasts in the elderly,possibly by inhibiting the nuclear factor-κB pathway.

Objective: To make a quantitative evaluation on the short term effect of particulate matter with aerodynamic diameter no more than 2.5 μm (PM_2.5) on cumulative excess mortality rate (CER) and years of life lost (YLL) in residents in Changping district of Beijing. Methods: The death data in local residents, daily mortality, meteorology data and air pollution data (PM_2.5, SO₂ and NO₂ concentrations) in Changping from 2014 to 2017 were collected. Distributed lag non-linear model was used to assess the age and gender specific cumulative lag effects of PM_2.5 on cardiovascular CER and daily YLL in Changping. Results: The effects of PM_2.5 on cardiovascular CER and YLL were obvious on lag 7 days and lag 9 days, respectively, peaking on day 14, and lasting for 21 days. On lag0-21 days, for a 10 μg/m³ increase in PM_2.5, the population based CER of cardiovascular disease death was 0.021% (95%CI: 0.004%-0.038%), and the YLL was 1.47 (95%CI: 0.23-2.70) years. Greater PM_2.5 effect were observed in males and the elderly. Conclusion PM_2.5 increased the risk of cardiovascular disease death and YLL.

Objective: To research the variation of subgingival microorganisms after 65 μm glycine powder air-polishing (GPAP) in patients with periodontitis during periodontal maintenance phase and make comparison with conventional method. Methods: From Department of Periodontology, Peking University School and Hospital of Stomatology, twenty-one patients at the age of 35-72 (8 males and 13 females) who were systematically healthy were recruited in this study. According to splitting-mouth design, one side of a mouth was randomly assigned to the experiment group (21 patients, 248 teeth, 1 488 sites) with 65 μm GPAP therapy while the opposite side served as the control group (21 patients, 249 teeth, 1 494 sites) with ultrasonic scaling plus polishing paste therapy. The clinical periodontal parameters including probing depth (PD), bleeding index (BI), bleeding on probing (BOP) and plaque index (PLI) were recorded. Using sterile currette, the subgingival plaque samples were collected at the mesio-buccal site of the first or second molars at baseline, 2, 4, 8 and 12 weeks after therapy, respectively. After Congo red staining, the microorganisms were classified into cocci, bacilli and spirochetes and counted respectively. Results: All clinical periodontal parameters have no difference between two groups at baseline and after treatment 12 weeks. In the experiment group and the control group, PD ([2.33±0.90] and [2.37±1.18] mm), BI (0.96±0.70 and 0.98±0.78) and PLI (0.00[1.00] and 0.00[1.00]) of two groups after treatment 12 weeks were better than those at baseline (PD: [2.48±1.17] and [2.46±0.99] mm; BI: 1.07±0.72 and 1.08±0.75; PLI: 0.00 [1.00] and 0.00 [1.00]) (P<0.05). But BOP(+)% was observably reduced only in the control group after treatment 12 weeks ([17.25±2.21]% vs [25.23±2.83]%) (P<0.05). The percentages of cocci, bacilli and spirochetes were stable and there were not significant differences between the two groups (P>0.05). Conclusions After 65 μm GPAP therapy, the differences of proportion of subgingival microorganisms are not significant, while the control group has the same trend. The spirochetes remained at a low level, but they rebounded fasterly in the test group than that in the control group. The results indicate that 65 μm glycine powder air-polishing has the similar clinical effects compared with ultrasonic scaling plus polishing paste. However, the clinical indications should be limited to the patients with shallow pockets and without obvious dental calculus.

Objective To analyze the distribution of types and characteristics of periodontal diseases in 34 677 patients visiting the Department of Periodontology, Peking University School and Hospital of Stomatology.Methods Clinical data of 34 677 patients who had the electronic periodontal examination charts from 2007 to 2012 were collected and analyzed.Results Out of 34 677 patients, 32 517 (93.77％) were diagnosed as chronic periodontitis(CP), 1 642(4.74％) were aggressive periodontitis(AgP) and the rest 518(1.49％) patients were classified into some other types of periodontitis.There were more female patients than male ones.Most of patients were between 25 to 54 years olds.Only 7 306(21.07％) patients had more than two periodontal examination charts which represented regular re-visits to the doctors.The majority of patients had severe periodontitis.Conclusions Most of the patients visiting the Department of Periodontology were older aged and diagnosed chronic periodontitis.They had more severe periodontitis conditions but less re-visits.Therefore it is very important for dentists to enhance the oral health education and make early diagnosis and treatment of periodontal diseases for patients.Dentists also should do more follow-up and maintenance works for patients after the initial treatments.

The relationship between peripheral blood platelet-to-lymphocyte ratio (PLR) and the type 2 diabetic nephropathy was investigated.PLR was positivly related with microalbuminuria(P＜0.01).The multifactor logistic regression analysis showed that PLR was a risk factor of type 2 diabetic nephropathy (OR =2.012,95％ CI 1.000-5.023,P＜0.05).