BACKGROUND: The effect of the interval between previous Helicobacter pylori (H. pylori) eradication and rescue treatment on therapeutic outcomes remains unknown. The aim of this study was to investigate the association between eradication rates and treatment interval durations in H. pylori infections. METHODS: This prospective observational study was conducted from December 2021 to February 2023 at six tertiary hospitals in Shandong, China. We recruited patients who were positive for H. pylori infection and required rescue treatment. Demographic information, previous times of eradication therapy, last eradication therapy date, and history of antibiotic use data were collected. The patients were divided into four groups based on the rescue treatment interval length: Group A, ≥4 weeks and ≤3 months; Group B, >3 and ≤6 months; Group C, >6 and ≤12 months; and Group D, >12 months. The primary outcome was the eradication rate of H. pylori . Drug compliance and adverse events (AEs) were also assessed. Pearson's χ2 test or Fisher's exact test was used to compare eradication rates between groups. RESULTS: A total of 670 patients were enrolled in this study. The intention-to-treat (ITT) eradication rates were 88.3% (158/179) in Group A, 89.6% (120/134) in Group B, 89.1% (123/138) in Group C, and 87.7% (192/219) in Group D. The per-protocol (PP) eradication rates were 92.9% (156/168) in Group A, 94.5% (120/127) in Group B, 94.5% (121/128) in Group C, and 93.6% (190/203) in Group D. There was no statistically significant difference in the eradication rates between groups in either the ITT ( P = 0.949) or PP analysis ( P = 0.921). No significant differences were observed in the incidence of AEs ( P = 0.934) or drug compliance ( P = 0.849) between groups. CONCLUSION: The interval duration of rescue treatment had no significant effect on H. pylori eradication rates or the incidence of AEs. REGISTRATION ClinicalTrials.gov , NCT05173493.
Humans ; Helicobacter Infections/drug therapy* ; Helicobacter pylori/pathogenicity* ; Male ; Female ; Prospective Studies ; Middle Aged ; Anti-Bacterial Agents/adverse effects* ; Adult ; Aged ; Treatment Outcome ; Proton Pump Inhibitors/therapeutic use*

Objective To explore the underlying mechanism of β2 adrenergic receptor(ADRB2)in fibrogenesis during wound healing.Methods Non-specific ADRB2 gene knockdown adeno-associated virus(AAV-ADRB2 group,6 mice)and control virus(AAV-NC group,6 mice)was injected randomly into the back skin of 12 mice for 21 days,a full-thickness skin defected wound healing murine model was established.Wound healing rates were recorded at the 1st,3rd,5th,and 7th day after operation.Histological examinations by H-E staining,Masson staining,and immunohistochemistry were conducted to observe wounded skin tissue structure,fibrosis,and α-SMA protein expression;quantitative PCR was employed to analyze ADRB2 and matrix metalloproteinase(MMP)mRNA levels;Western blotting was utilized to assess the protein expression levels of COL1A1,COL3A1,TGF-β1,and Smad3.Results On postoperative day 5 and 7,the wound healing rate of the AAV-ADRB2 group significantly decreased(P＜0.05),accompanied by a series pathological changes,including thickened epidermis,exaggerated inflammation,reduced fibroblast count,and inhibited collagen deposition;the α-SMA expression showed a significant decrease(P＜0.05),and the ratio of COL1A1 to COL3A1 decreased(P＜0.05);ADRB2 mRNA levels significantly decreased(P＜0.01),while MMP-1 and MMP-8 mRNA levels increased(P＜0.01);the protein levels of TGF-β1 and Smad3 exhibited a significant decrease(P＜0.05).Conclusions ADRB2 knockdown reduced fibrosis during wound healing and degenerated connective tissue content around the wound bed by inhibiting the TGF-β1/Smad3 signaling pathway,which leads to an increase in MMP mRNA levels and a decrease in the ratio of type Ⅰ to type Ⅲ collagen.

Objective:To explore the application and potential optimization of the collaborative and competitive learning model in the Health Education course. Methods:Undergraduate medical students participating in Health Education course practice tasks were selected to conduct discussions and reach consensus according to research objectives based on the e fast anonymous consensus-forming tool (eFAST). The meeting records were analyzed for theme identification using the keyword classification method. Results:Nine medical students participated in eFAST discussions. The students considered the following five aspects as the most important for undertaking Health Education course practice tasks using the collaborative and competitive learning model: timely communication, problem evaluation, report content enrichment, reasonable task allocation within groups, and task topic selection by group members together. They also proposed suggestions on improvement of the assessment method, including teacher involvement in scoring, intra-group scoring based on inter-group scoring, all students participating in inter-group scoring, and using mobile applications for scoring and summarization. Conclusions:The collaborative and competitive learning model can be used in the teaching of Health Education, but further optimization is needed in course task design, implementation, reporting, and assessment.

Cancer is a major global health issue. Effective therapeutic strategies can prolong patients’ survival and reduce the costs of treatment. Drug repurposing, which identifies new therapeutic uses for approved drugs, is a promising approach with the advantages of reducing research costs, shortening development time, and increasing efficiency and safety. Disulfiram (DSF), a Food and Drug Administration (FDA)-approved drug used to treat chronic alcoholism, has a great potential as an anticancer drug by targeting diverse human malignancies. Several studies show the antitumor effects of DSF, particularly the combination of DSF and copper (DSF/Cu), on a wide range of cancers such as glioblastoma (GBM), breast cancer, liver cancer, pancreatic cancer, and melanoma. In this review, we summarize the antitumor mechanisms of DSF/Cu, including induction of intracellular reactive oxygen species (ROS) and various cell death signaling pathways, and inhibition of proteasome activity, as well as inhibition of nuclear factor-kappa B (NF-κB) signaling. Furthermore, we highlight the ability of DSF/Cu to target cancer stem cells (CSCs), which provides a new approach to prevent tumor recurrence and metastasis. Strikingly, DSF/Cu inhibits several molecular targets associated with drug resistance, and therefore it is becoming a novel option to increase the sensitivity of chemo-resistant and radio-resistant patients. Studies of DSF/Cu may shed light on its improved application to clinical tumor treatment.

Objective:Glaucoma is a multifactorial optic neuropathy with a high rate of irreversible visual loss,and its pathogenesis is complex and still unclear.Elevated intraocular pressure(IOP)is well recognized as the sole modifiable risk factor for the development of glaucoma in the majority of cases.This study aims to compare 2 different methods of inducing chronic ocular hypertension by circumlimbal suture or by laser burns in degree and lasting time of the IOP,different status of the retina and retinal ganglion cells(RGCs),and changes of the microstructure of neurons. Methods:The chronic ocular hypertension models were induced by 2 different ways.One kind of the models was built by unilateral circumlimbal suture(10/0)implantation(suture group),another kind of model was built by laser burns at trabecular meshwork and episcleral veins(laser group).The untreated contralateral eye served as the control group.Changes in IOP were observed and regularly monitored in the 2 groups of rats.HE staining was applied to observe the retinal and optic nerve pathology.Transmission electron microscope(TEM)was used to observe the mitochondrial morphology.RGCs were specifically labeled with Brn3b antibody and counted.The expression of caspase-3 was detected by Western blotting to clarify the apoptosis of RGCs. Results:Compared with the control group,IOP were significantly increased in the suture group and the laser group(both P<0.05).The suture group induced a 1.5-fold elevation of IOP,and sustained for 8 weeks.The laser group induced a 2-fold elevation of IOP for 12 weeks.Both methods could cause RGCs loss(both P<0.05),which were verified by pathology and immune staining of Brn3b.The expressions of caspase-3 were also increased(both P<0.05).The mitochondrial morphology became more fragment,which changed from long shape to round and small one under TEM in 2 models.For comparison,the pathology changes of retinal structure in suture group were not obviously than those in the laser group. Conclusion:Circumlimbal suture can build an effective model of chronic elevated IOP and induce glaucomatous pathologic changes similar to those in the laser photocoagulation,but the pathologic changes are milder than those in laser photocoagulation.Compare with translimbal laser photocoagulation,equipment and skill demand for circumlimbal suture is less.

Objective:To investigate the efficacy and safety of Rituximab (RTX) in the treatment of children with frequently relapsing/steroid-dependent nephrotic syndrome (FRNS/SDNS) and to analyze the factors influencing the efficacy.Methods:Case series study.The clinical data of children with FRNS/SDNS who received B-cell-guided RTX (single dose: 375 mg/m 2, maximum dose: 500 mg, one additional dose when peripheral blood CD19 + B lymphocytes ≥0.01) in the First Affiliated Hospital of Zhengzhou University from September 2019 to March 2022 were retrospectively collected.The frequency of relapse and cumulative dose of glucocorticoids before and after RTX treatment were compared.The Kaplan-Meier method was used to analyze relapse-free survival rate and FRNS/SDNS-free survival rate after RTX treatment.The influencing factors of relapse were analyzed using the Cox proportional hazards regression model. Results:Totally 47 children were enrolled, including 35 males and 12 females; the age of first application of RTX was 10.2 (6.9, 13.0) years; 33 children had used one type of immunosuppressant before, and 14 children had used two or more types of immunosuppressant before; the dose of RTX treatment was 3.0 (2.0, 3.0). The frequency of relapse[0(0, 0.55) times/year vs.1.62 (1.09, 2.40) times/year] and cumulative dose of glucocorticoids[0.12 (0.05, 0.21) mg/(kg·d) vs.0.40 (0.20, 0.56) mg/(kg·d)] after RTX treatment significantly decreased compared with previous immunosuppressive treatment ( Z=-5.56, -5.54, all P<0.001). The relapse-free survival rates at 6, 12, 18 and 24 months after treatment were 80.9%, 72.3%, 68.1% and 68.1%, respectively, and the FRNS/SDNS-free survival rates were 93.6%, 89.4%, 89.4% and 89.4%, respectively.Univariate Cox regression analysis showed that the high frequency of relapse during previous immunosuppressive therapy was a risk factor for relapse after RTX treatment ( P<0.05). Of the 14 children who relapsed, 6 occurred in children whose CD19 + B lymphocytes<0.01, and the frequency of relapse after RTX treatment was significantly higher than those whose CD19 + B lymphocytes≥0.01 ( Z=-2.84, P=0.005). No severe adverse reactions occurred during RTX treatment and follow-up. Conclusions:The B-cell-guided RTX is effective and safe in the treatment of FRNS/SDNS in children.The high frequency of relapse during previous immunosuppressive therapy is a risk factor for relapse after RTX treatment, and relapse in the state of B lymphocyte depletion predicts poor outcomes of RTX treatment.

BACKGROUND:Periodontitis is an inflammatory and destructive disease with plaque biofilm as the main pathogenic material,which occurs in the gingiva,periodontal ligament,alveolar bone and cementum.The antigen of bacterial complex and its secreted toxin and enzyme directly lead to the destruction of periodontal tissue and trigger the host's immune response,causing indirect damage to the body tissue.Silence information regulatory factors(Sirtuins,SIRTs)play an important role in anti-aging,anti-oxidative stress,regulating inflammation,and mediating autophagy,and are closely related to the occurrence and development of periodontitis. OBJECTIVE:To review the research status of Sirtuins in periodontitis. METHODS:The first author used the computer to search the relevant research regarding the role of Sirtuins in periodontitis in PubMed,Web of Scene,CNKI and WanFang databases.The key words were"Sirtuins,Sirtuin1-7,periodontitis"in English and Chinese.After literature screening,57 articles were included for review and analysis. RESULTS AND CONCLUSION:SIRT1,SIRT2,SIRT3,and SIRT6 participate in regulating the occurrence and development of periodontitis.Inhibition of SIRT1 expression may be the target of periodontitis treatment,while overexpression of SIRT1 can inhibit periodontitis and protect periodontal tissue.The activator of SIRT1 can reduce the inflammation of periodontal tissue and improve the systemic pathological changes caused by periodontitis.SIRT2 is involved in nicotinamide phosphoribosyltransferase-mediated periodontal inflammation and plays a role in the treatment and prognosis of periodontal diseases.SIRT3 can improve age-related periodontal disease.Gastrodin promotes the osteogenic differentiation of periodontal ligament stem cells through the up-regulation of SIRT3.The activator of SIRT3 reduces the damage of periodontitis to periodontal and renal tissues by regulating the level of autophagy in the cells.SIRT6 can inhibit the inflammatory reaction of periodontal tissue and inhibit the differentiation and mineralization of cementoblasts.SIRT6 is beneficial to the prognosis of periapical periodontitis.The relationship between SIRT4,SIRT5,SIRT7 and periodontitis is rarely reported.

Objective:To explore the pathogenesis of flunarizine-induced parkinsonism from gut-brain axis perspective.Methods:Thirty male C57BL/6 mice were randomly divided into control group and flunarizine group ( n=15). Mice in the control group were given 0.1 mL 50% polyethylene glycol 400+50% saline by gavage once/d for 2 weeks, while mice in the flunarizine group were given 6 mg/mL flunarizine+50% polyethylene glycol 400+50% saline by gavage at a daily dose of 30 mg/kg for 2 weeks. Body mass was recorded 1, 3, 5, 7, 10 and 14 d after drug administration, and motor function was assessed by rotarod test 14 d after drug administration; 16s RNA sequencing was performed in the feces to observe the intestinal flora; intestinal transit function was detected by Evans blue by gavage; and then, the mice were sacrificed and homogenate or frozen sections (brain and intestinal tissues) were prepared; dopamine-ergic neuron expression was detected by Western blotting; RT-qPCR was applied to detect the expressions of inflammatory factors in the substantia nigra, and immunofluorescent staining was used to detect the expressions of ZO-1 and Claudin-5 in the intestinal epithelial tissues. Results:Compared with the control group, the flunarizine group had lower body mass ratio 1, 3, 5, 7, 10 and 14 d after drug administration (ratio to body mass before drug administration). Compared with the control group, the flunarizine group had significantly shortened residence time in rod rotating and lower rotational speed when falling ( P<0.05). Compared with the control group, the flunarizine group had decreased tyrosine hydroxylase protein in the substantia nigra without significant difference ( P>0.05). Compared with the control group, the flunarizine group had significantly increased interleukin-6 and tumor necrosis factor-α in the substantia nigra (1.00±0.00 vs. 2.79±0.83; 1.00±0.00 vs. 3.39±1.37), significantly lower intestinal Evans blue propulsion rate (80.67%±4.51% vs. 50.67%±6.03%), and statistically decreased ZO-1 and Claudin-5 expressions in the colonic epithelial tissues (27.01±1.41 vs. 16.32±2.83; 37.00±2.80 vs. 24.52±2.12, P<0.05). Totally, 576 microorganisms were noted in both control group and flunarizine group, 744 in the control group alone, and 634 in the flunarizine group alone. The intestinal flora β diversity indices in the 2 groups were significantly different based on weighted Unifrac-principle coordinates analysis (PCoA, PCoA1: 39.88%; PCoA2: 30.69%). Compared with the control group, the microbial colony structure of mice in flunarizine group was dominated by phylum thick-walled bacteria and phylum warty microbacteria, and by families Muribaculaceae, Lachnospiraceae and Akkermansiaceae. Compared with the control group, the flunarizine group had significantly decreased relative abundance of Ackermannia spp. and Lactobacillus spp. in the intestinal flora ( P<0.05). Conclusion:Flunarizine may contribute to the pathogenesis of DIP by causing structural disturbances in the intestinal flora and inducing neuroinflammation based on the gut-brain axis.

Objective:To establish an epidemiological cut-off value (ECV) for antifungal drugs against Cryptococcus neoformans in East China through a multicenter in vitro drug susceptibility test. Methods:A retrospective collection of 479 clinical isolates of Cryptococcus neoformans was conducted by the East China Invasive Fungal Infection Group (ECIFIG) from January 1, 2017 to December 31, 2022. Mass spectrometry and gene sequencing were used for identification. A unified drug susceptibility testing system was established in the fungal laboratories across three sub centers in Shanghai, Jiangxi, and Jiangsu provinces. Drug susceptibility testings of Cryptococcus neoformans were independently completed in each center after passing consistency evaluation. Epidemiological breakpoints were established against fluconazole, voriconazole, amphotericin B, 5-fluorocytosine, isaconazole, posaconazole and itraconazole following the principles and procedures of the Clinical and Laboratory Standards Institute (CLSI) M57. Results:External consistency evaluation revealed that the minimum inhibitory concentration values ??for all drugs in each center did not differ by more than one dilution gradient. A new ECV type of Cryptococcus neoformans in East China was established, including fluconazole 16 mg/L, voriconazole 0.12 mg/L, amphotericin B 1 mg/L, 5-fluorocytosine 8 mg/L, isavuconazole 0.12 mg/L, posaconazole 0.5 mg/L, and itraconazole 0.5 mg/L. Conclusion:This study preliminarily revealed the drug susceptibility characteristics of clinical Cryptococcus neoformans in East China and established the ECVs for antifungal drugs against Cryptococcus neoformans in the region.