Objective: To analyze the association between each regional fat mass and total body bone mineral density (BMD) in children and adolescents aged 7-17 years in Beijing, so as to provide theoretical basis and practical guidance for implementing interventions. Methods: From September to December 2020, a stratified cluster random sampling method was used to select 1 423 children and adolescents aged 7-17 years in Tongzhou District, Beijing. Dual energy X-ray absorptiometry (DXA) was employed to measure regional body composition and total body BMD. Multiple linear regression was used to analyze the association between regional fat mass and total body BMD. Results: The median (interquartile range) fat mass values for total body, upper limbs, abdomen, hips, and thighs were 13.51(8.84, 19.21), 1.59(1.08, 2.23), 0.73(0.39, 1.29), 2.32(1.46, 3.26), 5.29(3.59, 7.21)kg, respectively. After adjusting for covariates, the results of multiple linear regression analysis showed that total body fat mass (β=0.010), abdominal fat mass (β=-0.100), and hip fat mass (β=0.104) were significant associations with total body BMD (all P<0.01). Sexstratified analysis revealed that in boys, total body fat mass (β=0.008) and hip fat mass (β=0.058) were positively associated with BMD, while thigh fat mass (β=-0.038) showed a negative association with total body BMD (all P<0.05). In girls, total body fat mass (β=0.013), hip fat mass (β=0.163), and thigh fat mass (β=0.023) were positively associated with total body BMD, whereas abdominal fat mass (β=-0.196) showed a negative association with total body BMD (all P<0.05). Among children and adolescents with body fat percentage below the standard range, within the standard range and above the standard range, total body fat masses were positively associated with total body BMD (β=0.021, 0.016, 0.015); among children and adolescents with body fat percentage within the standard range while upper limb (β=-0.042), abdominal (β=-0.067), and thigh fat mass (β=-0.018) showed negative associations with total body BMD, and hip fat mass demonstrated a positive association with total body BMD (β=0.082) (all P<0.05). Conclusion Regional fat distribution is associated with total body BMD in children and adolescents, with the nature of these associations varying by sex and body fat percentage.

Recent studies have indicated that the expression of ubiquitin-specific protease 51 (USP51), a novel deubiquitinating enzyme (DUB) that mediates protein degradation as part of the ubiquitin‒proteasome system (UPS), is associated with tumor progression and therapeutic resistance in multiple malignancies. However, the underlying mechanisms and signaling networks involved in USP51-mediated regulation of malignant phenotypes remain largely unknown. The present study provides evidence of USP51's functions as the prominent DUB in chemoresistant triple-negative breast cancer (TNBC) cells. At the molecular level, ectopic expression of USP51 stabilized the 78 kDa Glucose-Regulated Protein (GRP78) protein through deubiquitination, thereby increasing its expression and localization on the cell surface. Furthermore, the upregulation of cell surface GRP78 increased the activity of ATP binding cassette subfamily B member 1 (ABCB1), the main efflux pump of doxorubicin (DOX), ultimately decreasing its accumulation in TNBC cells and promoting the development of drug resistance both in vitro and in vivo. Clinically, we found significant correlations among USP51, GRP78, and ABCB1 expression in TNBC patients with chemoresistance. Elevated USP51, GRP78, and ABCB1 levels were also strongly associated with a poor patient prognosis. Importantly, we revealed an alternative intervention for specific pharmacological targeting of USP51 for TNBC cell chemosensitization. In conclusion, these findings collectively indicate that the USP51/GRP78/ABCB1 network is a key contributor to the malignant progression and chemotherapeutic resistance of TNBC cells, underscoring the pivotal role of USP51 as a novel therapeutic target for cancer management.

Objective: To explore the influencing factors and pathways of suicidal ideation among children and adolescents with severe autism spectrum disorder (ASD), so as to provide references for clarifying the impact intensity and pathways of various factors on suicidal ideation in the population. Methods: A cross sectional study was conducted from June 17, 2024, to January 12, 2025, involving 96 severely affected ASD children and adolescents aged 8-18 years from Tianjin. Participants were assessed using the Puberty Development Scale (PDS), Children s Alexithymia Measure (CAM), Strengths and Difficulties Questionnaire (SDQ), and Positive and Negative Suicide Ideation (PANSI). The random forest Boruta algorithm was employed to screen core variables, and a Bayesian network model was constructed to analyze the influencing factors of suicidal ideation in children and adolescents with severe ASD. Results: Through the screening using the Boruta algorithm, the SDQ scale score, conduct problems, hyperactivity, peer relationship problems and prosocial behavior were identified as the key predictors of suicidal ideation. A Bayesian network model was established with hyperactivity as the central mediating node. The impact of hyperactivity on suicidal ideation exhibited a non linear relationship: compared to the normal state (31.6%, 68.4%), the borderline state of hyperactivity was associated with a higher probability of low risk suicidal ideation (47.1%) and a lower probability of high risk suicidal ideation (52.9%). Suicidal ideation among children and adolescents with severe ASD was closely related to hyperactivity. In the state of hyperactivity, the abnormal peer relationship (95.2%) and the abnormal prosocial behavior (77.0%) were aggravated. Conclusions Suicide ideation among children and adolescents with severe ASD is strongly associated with hyperactivity traits. It is necessary to establish a prevention and control system centered on hyperactivity intervention to reduce this risk.

The seat of human intelligence is the human cerebral cortex, which is responsible for our exceptional cognitive abilities. Identifying principles that lead to the development of the large-sized human cerebral cortex will shed light on what makes the human brain and species so special. The remarkable increase in the number of human cortical pyramidal neurons and the size of the human cerebral cortex is mainly because human cortical radial glial cells, primary neural stem cells in the cortex, generate cortical pyramidal neurons for more than 130 days, whereas the same process takes only about 7 days in mice. The molecular mechanisms underlying this difference are largely unknown. Here, we found that bone morphogenic protein 7 (BMP7) is expressed by increasing the number of cortical radial glial cells during mammalian evolution (mouse, ferret, monkey, and human). BMP7 expression in cortical radial glial cells promotes neurogenesis, inhibits gliogenesis, and thereby increases the length of the neurogenic period, whereas Sonic Hedgehog (SHH) signaling promotes cortical gliogenesis. We demonstrate that BMP7 signaling and SHH signaling mutually inhibit each other through regulation of GLI3 repressor formation. We propose that BMP7 drives the evolutionary expansion of the mammalian cortex by increasing the length of the neurogenic period.
Animals ; Mice ; Humans ; Ependymoglial Cells/metabolism* ; Hedgehog Proteins/metabolism* ; Ferrets/metabolism* ; Cerebral Cortex ; Neurogenesis ; Mammals/metabolism* ; Neuroglia/metabolism* ; Bone Morphogenetic Protein 7/metabolism*

Objective:To explore the influence of Internet diversified rehabilitation medicine education on self-efficacy and quality of life in newly diagnosed breast cancer patients.Methods:A prospective study was performed in 130 newly diagnosed breast cancer patients admitted to Beijing Friendship Hospital, Capital Medical University from February 2020 to February 2021. According to the method of randomly number table, these patients were divided into control group and intervention group, 65 cases in each group.The control group was treated with routine treatment scheme, and the intervention group added the intervention of Internet diversified education of rehabilitation medicine on the basis of routine treatment scheme. Compared the general data of the two groups, the General Self-Efficacy Scale (GSES) and the cancer patients′ Quality of Life Questionnaire-Core 30 (QLQ-C30) were used to compare the self-efficacy levels of the two groups before operation, 4 months and 8 months after operation, evaluate the quality of life. Measurement data were expressed as mean ± standard deviation ( ± s), and t-test was used for comparison between groups; Chi-square test was used for comparison of enumeration data between groups. Results:Before operation, there was no significant difference in general data, GSES score and QLQ-C30 score between the two groups ( P> 0.05). Four months after operation, GSES scores [(27.39±4.68) score vs (25.91±3.18)score], somatic function [(65.50±4.34) score vs (63.07±5.42) score], cognitive function [(67.63±10.32) score vs (63.29 ± 11.36) score], role function [(50.82±10.80) score vs (45.59±13.94) score], and total quality of life [(63.47 ± 6.98) score vs (59.26±7.98)score] were compared between the intervention group and the control group, the difference was statistically significant ( P< 0.05). There was no significant difference in the scores of emotional function [(57.60±11.72) score vs (55.53±10.61) score] and social function [(49.86±12.11) score vs (46.13±10.25) score] ( P> 0.05). Eight months after operation, the GSES score [(28.82±3.31) score vs (26.73 ± 3.06) score] of patients in the intervention group and the control group, and the scores of functional areas and overall quality of life in QLQ-C30 score were significantly different ( P< 0.01). Conclusion:the Internet diversified rehabilitation medicine education has a significant effect on improving the self-efficacy of new breast cancer patients, and can improve the quality of life of patients.

Liquid biopsy of circulating free DNA has become an auxiliary method to evaluate cancer.Because of the advantages of minimally invasive and simple, it plays an increasingly important role in the screening, diagnosis, monitoring treatment, prognosis and drug resistance detection of breast cancer.This article reviews the clinical application and related research progress of circulating free DNA (cfdna) in breast cancer.

Objective To investigated the role of antithrombin Ⅲ (AT-Ⅲ) levels in the early diagnosis of disseminated intravascular coagulation (DIC) in patients with sepsis and the predictive effect of AT-Ⅲ on the development of DIC.Methods A retrospective study was conducted. Patients admitted to intensive care unit (ICU) of the First Affiliated Hospital of China Medical University from January to December in 2015 were enrolled. The patients were divided into sepsis group and non-sepsis group according to the diagnostic criteria of sepsis. In addition, sepsis patients were divided into 3 subgroups according to the international society on thrombosis and haemostasis (ISTH) scores on the first day: overt DIC (ISTH ≥ 5), non-overt DIC (ISTH 1-4) and none DIC group (ISTH = 0). Blood routine test, prothrombin time (PT), fibrinogen (Fib), D-dimer, fibrin degradation products (FDP), acute physiology and chronic health evaluation Ⅱ (APACHE Ⅱ) scores, sequential organ failure assessment (SOFA) scores and ISTH scores were recorded on the first ICU day. AT-Ⅲ was recorded during 7 days. The differences were compared among these 3 groups. Correlations of AT-Ⅲ with various parameters were calculated by using Pearson correlation analysis in sepsis group and overt DIC group. Receiver operating characteristic (ROC) curves for diagnosis of DIC with AT-Ⅲ, AT-Ⅲ+PT were drawn to evaluate the diagnostic efficiency. The AT-Ⅲ levels of DIC patients were compared between early-onset DIC and late-onset DIC during their ICU stay. The change of AT-Ⅲ levels with time and prognosis in patients with early-onset DIC was compared between groups.Results Totally 445 patients were recruited, with 138 patients in sepsis group, and 307 in non-sepsis group. There were 20 patents diagnosed with overt DIC on the first ICU day, 115 patients non-overt DIC and 3 patients of none DIC. Twenty-five sepsis patients were diagnosed overt DIC during the ICU days. AT-Ⅲ level in sepsis patients on the first ICU day were lower than that in non-sepsis patients [(55.29±13.92)% vs. (76.54±12.31)%,P < 0.01]. Patients with overt DIC had a lower AT-Ⅲ level than non-overt DIC or none DIC patients [(43.85±13.00)% vs. (56.95±13.03)%, (68.00±16.52)%, bothP < 0.05]. It was shown by Pearson correlation analysis that AT-Ⅲ level of sepsis patients on the first ICU day was negatively correlated to ISTH score and PT (r value were -0.467, -0.654, bothP < 0.01). AT-Ⅲ level of overt DIC patient on the first ICU day was negatively correlated with PT (r = -0.675,P = 0.001). It was shown by ROC curve that area under ROC curve (AUC) of AT-Ⅲ combined with PT for diagnosis overt DIC in sepsis patients was higher than that of AT-Ⅲ or PT alone (0.843 vs. 0.763, 0.834), the sensitivity 90.0%, specificity 73.7%. The cut-off value for overt DIC diagnosis in sepsis patients of AT-Ⅲ level alone was 48.5%, sensitivity was 78.0%, specificity was 70.0%. On the first ICU day, AT-Ⅲ level was risen when ISTH score improved in patients with sepsis. There was similar change of AT-Ⅲ level between patients with early-onset DIC and late-onset DIC. AT-Ⅲ level increased with DIC improvement.Conclusion AT-Ⅲ level can be used for diagnosing sepsis-associated overt DIC independently or with a combination of PT. When ISTH score improved, AT-Ⅲ level was risen in patients with sepsis associated DIC.

The single molecule imaging and technologies that developed in 1990 s have successfully probed the dynamics of single molecule enzyme catalysis in real time in vitro. Ever since then, single molecule enzymology has entered the golden age of rapid developing. Individual features of each enzyme hidden in the overall average have been discovered, and many new catalytic mechanisms have been proposed. Single molecule enzymology sheds light on the dynamic interactions between enzymes and substrates or products, deepening the understanding of biochemical reactions. This review described the recent research progresses of single molecule protease and ribozyme.

Objective To explore the differences in clinical and pathological characteristics of idiopathic membranous nephropathy between elderly and non elderly patients.Methods The clinical and pathological data,which were used for biopsy diagnosing idiopathic membranous nephropathy in elderly patients (aged ≥65 years) versus non elderly patients (aged ＜65 years) in our hospital during the recently 10 years,were retrospectively analyzed and compared.Results The elderly patients with idiopathic membranous nephropathy accounted for 26.29％ and patients aged less than 45 years with idiopathic membranous nephropathy accounted for 25.26％.The proportions of idiopathic membranous nephropathy in the two different age groups were similar.The occurrence rate of hypertension and microscopic hematuria as well as levels of blood serum creatinine and urinary N-acetyl-β-D-glucosaminidase were higher,while the urinary osmotic pressure,estimated glomerular filtration rate (eGFR) and blood albumin were lower in elderly group than in non-elderly group (all P＜0.05).The proportions of glomerulosclerosis,tubulointerstitial lesions and vascular lesions were higher in elderly group than in non-elderly patients (all P＜ 0.05).There were no significant differences in the immunofluorescence intensity of IgG,positive rates of IgA,C3,C4 and Fi between the two groups,while the positive rate of C1q was lower in elderly group than in non elderly.Among 51 patients receiving IgG4 immunohistochemical staining,the positive rate of IgG4 staining and the intensity were higher in elderly group than in non-elderly [100.00％ vs.81.25％,(2.11±0.46) vs.(1.59 ± 0.95),both P ＜ 0.05].Conclusions The proportion of idiopathic membranous nephropathy is increased in non-elderly patients.Elderly patients are more susceptible to hypertension,hematuria and renal dysfunction.The positive rate and the intensity of IgG4 are higher and the positive rate of C1q is lower in elderly group than in non-elderly group,which indicate that patients with negative IgG4 and positive C1q have secondary causes which have not yet been demonstrated,and they should be closely observed during the follow-up.