Alzheimer's disease (AD) is a common neurodegenerative disorder among the elderly, and BuChE has emerged as a potential therapeutic target. In this study, we reported the development of compound 8e, a selective reversible BuChE inhibitor (eqBuChE IC₅₀ = 0.049 μmol/L, huBuChE IC₅₀ = 0.066 μmol/L), identified through extensive virtual screening and lead optimization. Compound 8e demonstrated favorable blood-brain barrier permeability, good drug-likeness property and pronounced neuroprotective efficacy. Additionally, 8e exhibited significant therapeutic effects in zebrafish AD models and scopolamine-induced cognitive impairments in mice. Further, 8e significantly improved cognitive function in APP/PS1 transgenic mice. Proteomics analysis demonstrated that 8e markedly elevated the expression levels of very low-density lipoprotein receptor (VLDLR), offering valuable insights into its potential modulation of the Reelin-mediated signaling pathway. Thus, compound 8e emerges as a novel and potent BuChE inhibitor for the treatment of AD, with significant implications for further exploration into its mechanisms of action and therapeutic applications.

Background::Pathological scars are a disorder that can lead to various cosmetic, psychological, and functional problems, and no effective assessment methods are currently available. Assessment and treatment of pathological scars are based on cutaneous manifestations. A two-photon microscope (TPM) with the potential for real-time non-invasive assessment may help determine the under-surface pathophysiological conditions in vivo. This study used a portable handheld TPM to image epidermal cells and dermal collagen structures in pathological scars and normal skin in vivo to evaluate the effectiveness of treatment in scar patients. Methods::Fifteen patients with pathological scars and three healthy controls were recruited. Imaging was performed using a portable handheld TPM. Five indexes were extracted from two dimensional (2D) and three dimensional (3D) perspectives, including collagen depth, dermo-epidermal junction (DEJ) contour ratio, thickness, orientation, and occupation (proportion of collagen fibers in the field of view) of collagen. Two depth-dependent indexes were computed through the 3D second harmonic generation image and three morphology-related indexes from the 2D images. We assessed index differences between scar and normal skin and changes before and after treatment.Results::Pathological scars and normal skin differed markedly regarding the epidermal morphological structure and the spectral characteristics of collagen fibers. Five indexes were employed to distinguish between normal skin and scar tissue. Statistically significant differences were found in average depth ( t = 9.917, P <0.001), thickness ( t = 4.037, P <0.001), occupation ( t= 2.169, P <0.050), orientation of collagen ( t = 3.669, P <0.001), and the DEJ contour ratio ( t = 5.105, P <0.001). Conclusions::Use of portable handheld TPM can distinguish collagen from skin tissues; thus, it is more suitable for scar imaging than reflectance confocal microscopy. Thus, a TPM may be an auxiliary tool for scar treatment selection and assessing treatment efficacy.

Objective:Central nervous system leukemia(CNSL)is one of the main causes of recurrence and death in patients with acute leukemia.This study aims to dynamically monitor minimal residual disease(MRD)in cerebrospinal fluid and bone marrow of patients with different types of acute leukemia by flow cytometry(FCM),and to compare the timeliness and consistency of MRD detection between the 2 methods to further explore the application value of monitoring MRD in cerebrospinal fluid. Methods:A total of 199 patients with acute leukemia admitted to the Guangdong Provincial people's Hospital between October 2018 and January 2022 were retrospectively analyzed,and multiparametric FCM method was adopted to summarize and analyze MRD in cerebrospinal fluid of patients with different types of leukemia and MRD in cerebrospinal fluid and bone marrow specimens of the same patients,and its role in assessing the prognostic value of patients was discussed. Results:Among the 199 acute leukemia cases,a total of 31 cases(15.58%)were positive MRD in the cerebrospinal fluid,of which 18 cases(58%)were detected earlier than the corresponding bone marrow specimens.Among the 19 patients with acute T lymphoblastic leukemia,134 patients with acute B lymphoblastic leukemia,and 46 patients with acute myeloid leukemia counted,there were 4,18,and 9 patients with positive MRD in the cerebrospinal fluid.The Kappa value of the concordance test between the results of cerebrospinal fluid MRD and bone marrow MRD in different types of acute leukemia was only 0.156,demonstrating a low concordance between them. Conclusion:Dynamic monitoring of cerebrospinal fluid MRD by FCM can be used as a monitoring index for central nervous system leukemia,and monitoring cerebrospinal fluid can detect MRD earlier compared with bone marrow,which complements each other as a sensitive index for evaluating prognosis with significant guidance in clinic.

The well-known insulin-like growth factor 1 (IGF1)/IGF-1 receptor (IGF-1R) signaling pathway is overexpressed in many tumors, and is thus an attractive target for cancer treatment. However, results have often been disappointing due to crosstalk with other signals. Here, we report that IGF-1R signaling stimulates the growth of hepatocellular carcinoma (HCC) cells through the translocation of IGF-1R into the ER to enhance sarco-endoplasmic reticulum calcium ATPase 2 (SERCA2) activity. In response to ligand binding, IGF-1Rβ is translocated into the ER by β-arrestin2 (β-arr2). Mass spectrometry analysis identified SERCA2 as a target of ER IGF-1Rβ. SERCA2 activity is heavily dependent on the increase in ER IGF-1Rβ levels. ER IGF-1Rβ phosphorylates SERCA2 on Tyr⁹⁹⁰ to enhance its activity. Mutation of SERCA2-Tyr⁹⁹⁰ disrupted the interaction of ER IGF-1Rβ with SERCA2, and therefore ER IGF-1Rβ failed to promote SERCA2 activity. The enhancement of SERCA2 activity triggered Ca²⁺_ER perturbation, leading to an increase in autophagy. Thapsigargin blocked the interaction between SERCA2 and ER IGF-1Rβ and therefore SERCA2 activity, resulting in inhibition of HCC growth. In conclusion, the translocation of IGF-1R into the ER triggers Ca²⁺_ER perturbation by enhancing SERCA2 activity through phosphorylating Tyr⁹⁹⁰ in HCC.

Insulin-like growth factor-1 receptor (IGF-1R) has been made an attractive anticancer target due to its overexpression in cancers. However, targeting it has often produced the disappointing results as the role played by cross talk with numerous downstream signalings. Here, we report a disobliging IGF-1R signaling which promotes growth of cancer through triggering the E3 ubiquitin ligase MEX3A-mediated degradation of RIG-I. The active β-arrestin-2 scaffolds this disobliging signaling to talk with MEX3A. In response to ligands, IGF-1Rβ activated the basal βarr2 into its active state by phosphorylating the interdomain domain on Tyr64 and Tyr250, opening the middle loop (Leu130‒Cys141) to the RING domain of MEX3A through the conformational changes of βarr2. The models of βarr2/IGF-1Rβ and βarr2/MEX3A could interpret the mechanism of the activated-IGF-1R in triggering degradation of RIG-I. The assay of the mutants βarr2^Y64A and βarr2^Y250A further confirmed the role of these two Tyr residues of the interlobe in mediating the talk between IGF-1Rβ and the RING domain of MEX3A. The truncated-βarr2 and the peptide ATQAIRIF, which mimicked the RING domain of MEX3A could prevent the formation of βarr2/IGF-1Rβ and βarr2/MEX3A complexes, thus blocking the IGF-1R-triggered RIG-I degradation. Degradation of RIG-I resulted in the suppression of the IFN-I-associated immune cells in the TME due to the blockade of the RIG-I-MAVS-IFN-I pathway. Poly(I:C) could reverse anti-PD-L1 insensitivity by recovery of RIG-I. In summary, we revealed a disobliging IGF-1R signaling by which IGF-1Rβ promoted cancer growth through triggering the MEX3A-mediated degradation of RIG-I.

Objective:To construct the "Internet +" peripherally inserted central catheter (PICC) home nursing service quality evaluation index system, so as to provide objective basis for standardizing the "Internet +" PICC home nursing service quality evaluation.Methods:Based on the three-dimensional quality structure model of "structure-process-outcome", combined with literature research, semi-structured interviews, group discussions and Delphi method, 20 experts who were engaged in intravenous therapy nursing and had management or practical experience in "Internet + nursing services" were selected for two rounds of consultation to determine the "Internet?+" PICC home nursing service quality evaluation index system. The positive coefficient of experts was expressed by the effective response rate of the questionnaire and the rate of expert opinion submission. The degree of expert authority was expressed by the expert authority coefficient. The coordination degree of expert opinions was represented by the Kendall harmony coefficient. The concentration degree of expert opinions was usually expressed in terms of the importance assigned to the indicator, the coefficient of variation, and the full score rate (%) .Results:The effective response rates of the two rounds of consultation questionnaires were all 100%, with expert authority coefficients of 0.793 and 0.848 respectively. The Kendall coordination coefficients of expert opinions were 0.202-0.216 and 0.222-0.270 respectively ( P<0.05). After the second round of expert consultation, the mean importance assigned to all indicators was greater than 4.0, the coefficient of variation was less than 0.2, and the full score rate was greater than 20%. The final "Internet +"PICC home nursing service quality evaluation index system included 3 first-level indicators, 12 second-level indicators and 64 third-level indicators. Conclusions:The "Internet + " PICC home nursing service quality evaluation index system constructed is scientific, reliable and practical, and reflects the specialty characteristics. It can effectively evaluate the "Internet + " PICC home nursing service quality and provide guidance for continuous improvement.

Objective To study dynamic compression performance of adipose tissues, so as to further reveal the damage mechanism, and provide references for medical treatment.Methods Based on the improved split Hopkinson pressure bar (SHPB) experimental device, the adipose tissue dynamic compression experiment was conducted. The stress-strain curves of adipose tissues at different strain rates were obtained. Then the numerical model of SHPB was established, and the experimental process was simulated and analyzed. The numerical simulation for penetration process of 32 mm diameter rubber non-lethal projectile into the simulated target in human abdomen was carried out.Results Adipose tissues had a noticeable strain rate effect. The stress-strain curves at two high strain rates were approximately straight lines. The slope was similar, and the elastic modulus was 3.25 MPa, which was about 6 times of that under a quasi-static state. The simulation curves of fat SHPB were consistent with the experimental curves, which verified correctness of the constitutive model. In the process of non-lethal projectile penetrating human abdomen, an annular convex area similar to water wave appeared on skin surface, and the fat layer absorbed about 67% of the impact kinetic energy.Conclusions The experimental data of adipose tissues are very accurate. Numerical simulation can reproduce the penetration process well, and provide references for studying the damaging effect of non-lethal weapons on human body.

Objective To investigate the epidemiological characteristics and main risk factors of chronic kidney disease in the elderly in Tianmen, Hubei Province. Methods A descriptive method was adopted in this study. Using stratified sampling, a total of 720 local residents over 65 years old in Tianmen of Hubei Province were selected from January 2017 to January 2020 as the research subjects. The general information of patients with chronic kidney disease was compared, and the difference in the characteristics of patients with different disease progression was compared. The risk factors for chronic kidney disease and disease progression were analyzed. Results Through the diagnosis of chronic kidney disease, a total of 82 patients with chronic kidney disease were found, including 33 patients in stage I, 26 patients in stage II and 23 patients in stage III. As the disease progressed, the patient's age, serum uric acid, triglyceride, total cholesterol, fasting blood glucose, serum creatinine, and the incidence of chronic diseases all increased significantly. The results of correlation analysis showed that the incidence of chronic kidney disease and the progression of the disease were positively correlated with age, body mass index, serum uric acid, triglyceride, total cholesterol, fasting blood glucose, serum creatinine level, diabetes, hypertension, and dyslipidemia, which were independent risk factors for chronic kidney disease. Conclusion The prevalence of chronic kidney disease in Tianmen was 11.39%. Higher age, serum uric acid, blood lipid, blood pressure and blood glucose levels are all important factors for the progression of chronic kidney disease.

Objective:To understand the characteristics and associated factors of newly reported HIV/AIDS cases with non-marital or non-commercial heterosexual transmission, in Guangxi Zhuang Autonomous Region (Guangxi), 2015-2018.Methods:Information of newly reported HIV/AIDS cases aged ≥18 years in Guangxi between 2015 and 2018 was collected from the National Comprehensive HIV/AIDS Information System. Unconditional logistic regression model was used to access those factors that were associated with HIV infections through non-marital or non-commercial heterosexual contact.Results:Between 2015 and 2018, a total number of 35 497 HIV/AIDS cases, aged ≥18 years were newly reported in Guangxi. Among them, 32 648 (92.0 %) were infected heterosexually while 10 500 were infected through non-marital or non-commercial heterosexual behavior. Non-marital or non-commercial heterosexual transmission accounted for 29.6 % (10 500/35 497) of the newly reported HIV/AIDS cases, and 32.2 % (10 500/32 648) of those with heterosexual transmission. Males counted for 53.5 % (5 617/10 500) of non-marital or non-commercial heterosexual transmission and males to females ratio was 1.2∶1 (5 617∶4 883). Those married or had regular sexual partners counted for 55.9 % (5 873/10 500). Commercial heterosexual transmission appeared the main mode of HIV transmission for males (64.4 %,16 516/25 633) while main mode for females was non-marital or non-commercial heterosexual transmission and counted for 49.5 % (4 883/9 864). Results from the multivariate logistic regression analysis showed that adjusted OR of female HIV/AIDS infected HIV via non-marital or non-commercial heterosexual transmission, was 3.98 times (95 %CI: 3.78-4.20) hight than that of males. Among the group aged<50 years and the aged 50-59 years, the adjusted ORs were 1.35 times (95 %CI: 1.27-1.44) and 1.13 times (95 %CI: 1.05-1.21) hight than that of aged ≥60 years. Those who were single/divorced/widowed, the adjusted OR was 1.53 times (95 %CI: 1.45-1.61) hight than that of those married/regular partners. Those with junior high school education, high school education and above the adjusted ORs were 1.22 times (95 %CI: 1.16-1.29) and 1.18 times (95 %CI: 1.10-1.27), compared to those only with education levels of primary school or below. Conclusions:The number of HIV/AIDS cases via non-marital or non-commercial heterosexual transmission accounted for nearly 30.0 % of all the routes of HIV transmission in Guangxi, 2015-2018. Female, aged<60 years old, single/divorced/widowed and having had junior and above high school education etc., appeared as risk factors on non-marital or non-commercial heterosexual transmission, among newly reported HIV/AIDS in Guangxi.

Objective To investigate the impact of sample typeon the detection of c-KIT exon 17 mutation in acute myeloid leukemia (AML) patients. Methods A retrospective study was conducted on 51 bone marrow samples collected from 37 AML patients [17 maleand 20 female, with a median age of 33 (range from 1 to 82)] at diagnosis or after treatment from June 2016 to August 2018. Of the 37 cases of AML, 24 were t(8; 21) AML, 11 were inv(16)/t(16;16) AML and 2 were non-CBF-AML. RNA and DNA were simultaneously extracted from every sample. PCR followed by Sanger sequencing were used to screen c-KIT exon 17 mutation, and the comparisons were made between paired cDNA and DNAsamples. Results (1) Of the 51 paired samples, 14 pairs were simultaneously detected positive for c-KITmutation in both of cDNA and DNA samples, but 17 pairs were detected negative in both, and the remaining 20 pairswere only detected positive for the mutation in cDNA but not in DNA, with an inconsistency rate of 39.2％. The positive rate of detecting c-KITmutation was significantly higher in cDNA than in DNA samples (66.7％vs 27.5％,P=0.000073). (2)Inconsistent mutation results between paired cDNA and DNA samples occurred in t(8;21)AML, inv(16)AML and non-CBF-AML patients with the inconsistency rate of 36.4％(12/33), 27.2％(3/11) and 71.4％ (5/7), respectively. (3)The inconsistency rate was significantly higher in samples collected after treatment compared with those collected at diagnosis (72.7％vs 13.8％, P=0.00003). (4) All 5 serially monitored patients with c-KITmutation had inconsistency in mutation detection between cDNA and DNA samples during follow up. Conclusion cDNA improves the detection of c-KIT exon 17 mutation in AML patients compared with DNA, which is especially common after treatment.