Objective: To describe the prevalence and association of dietary rhythm and depressive symptoms among adolescents, so as to provide a basis for improving unhealthy behavioral habits,and to promote adolescent physical and mental health. Methods: From October to December 2021, a total of 22 868 students were selected from one middle school and high school in urban and rural areas of eight cities, namely, Shenyang, Xuzhou, Shenzhen, Taiyuan, Nanchang, Zhengzhou, Chongqing, and Kunming cities, China, using a combination of purposive sampling and stratified cluster random sampling. A self administered questionnaire was used to assess adolescents dietary rhythm, and the Patient Health Questionnaire-9 (PHQ-9) was used to assess depressive symptoms. Binary Logistic regression model was employed to analyze the associations between adolescent dietary rhythm and depressive symptoms, while the associations between adolescent dietary rhythm and depressive symptoms across gender and physical activity levels were stratified by gender and physical activity levels. Results: The detection rate of depressive symptoms in adolescents was 44.4%. The respective differences in the detection rates of depressive symptoms among adolescents of different genders, physical activity levels, and dietary rhythm disorders were statistically significant ( χ 2=157.51, 105.02, 3 282.50, P <0.01). Taking the low disordered dietary rhythm group as the reference, binary Logistic regression analyses showed that after adjusting for confounding factors such as age, gender，family location, family economic situation, whether only child, parental education level, and learning burden, physical activity levels, depressive symptoms were positively correlated with adolescents in the moderate disordered dietary rhythm group ( OR=2.63, 95%CI =2.45-2.83) and the high disordered dietary rhythm group ( OR=6.38, 95%CI = 5.93- 6.86). In addition, after stratifying by gender, dietary rhythm were positively correlated with depressive symptoms. The moderate disordered group (male: OR=2.62, 95%CI =2.37-2.89, female: OR=2.67, 95%CI =2.40-2.97) and the highly disordered group (male: OR=5.74, 95%CI =5.19-6.35, female: OR=7.11, 95%CI =6.40-7.89) were positively correlated with depressive symptoms. After stratification by physical activity levels, low, moderate and above physical activity levels among adolescents in the disordered dietary rhythm group (low physical activity: OR=2.91, 95%CI =2.58-3.29, moderate and above physical activity: OR= 2.50, 95%CI =2.28-2.74), high disordered group (low physical activity: OR=6.51, 95%CI =5.94- 7.13 , moderate and higher physical activity: OR=6.18, 95%CI =5.47-6.97) were positively associated with depressive symptoms ( P <0.01). There was an interaction between dietary rhythm and physical activity levels in regard to the development of depressive symptoms in adolescents, taking the group with moderate and above physical activity levels and low disordered dietary rhythm as the reference,the detection rate of which was higher in adolescents with low levels of physical activity and those in the moderate or high disordered dietary rhythm group ( OR=1.50, 3.90, 95%CI=1.39-1.61, 3.63-4.19, P <0.01). Conclusions Dietary rhythm disorders were found to be positively associated with depressive symptoms in adolescents. Regular dietary behaviors and increased physical activity play an important positive role in promoting adolescent mental health.

Background Clozapine belongs to atypical antipsychotic drugs that has shown significant efficacy in treating schizophrenia.However,clozapine can induce arrhythmias in patients.Currently,there is a lack of systematic research on the types and incidence of clozapine-induced arrhythmias.Objective To explore the types and incidence of arrhythmias in patients with schizophrenia induced by clozapine through Meta-analysis,so as to provide references for clinical treatment.Methods On October 31,2022,a search was conducted through PubMed,Embase,Cochrane Library and China National Knowledge Infrastructure(CNKI)to collect relevant literature on clozapine-induced arrhythmia in patients with schizophrenia.Joanna Briggs Institute(JBI)was used to evaluate the quality of the included literature.Meta-analysis was conducted using Review Manager 5.4.Results A total of 12 studies were included,involving 42 490 schizophrenia patients taking clozapine.The incidence of arrhythmias caused by clozapine was 23％(95％CI:0.16～0.29).Among them,the incidence of tachycardia was 25％(95％CI:0.15～0.35),atrial arrhythmia was 6％(95％CI:-0.02～0.14),ventricular arrhythmia was 7％(95％CI:-0.02～0.16),conduction block was 2％(95％CI:0～0.04),QTc prolongation was 4％(95％CI:-0.04～0.12)and T-wave changes was 23％(95％CI:0.16～0.30).Conclusion Schizophrenia patients taking clozapine may increase their risk of developing arrhythmia,with tachycardia being the most prevalent.

ObjectiveTo observe the therapeutic effects of Qishao Huoxue prescription on patients with lumbar disc herniation due to Qi stagnation and blood stasis and the effects of this prescription on hemorheological parameters and serum levels of inflammatory mediators. MethodA total of 86 patients with lumbar disc herniation due to Qi stagnation and blood stasis treated in the Wangjing Hospital of China Academy of Chinese Medical Sciences from January 2023 to February 2024 were selected and assigned according to the random number table into observation and control groups （n=43）. Patients in both groups received lumbar traction treatment. In addition， the observation group was orally treated with Qishao Huoxue prescription and the control group with celebrex for 3 weeks. The visual analogue scale （VAS） score， Oswestry disabilitiy index （ODI） score， 12-item Short-Form Survey （SF-12） score， traditional Chinese medicine （TCM） symptom score， hemorheological parameters ［whole blood high shear viscosity， middle shear viscosity， low shear viscosity， plasma viscosity （PV）， and fibrinogen （FIB）］， and the serum levels of inflammatory mediators ［tumor necrosis factor-α （TNF-α）， interleukin-6 （IL-6）， interleukin-1β （IL-1β）， and transforming growth factor-β₁ （TGF-β₁）］ were determined before and after treatment. In addition， the clinical efficacy and adverse reactions were observed and compared between the two groups. ResultAfter treatment， both groups showed declined VAS， ODI， and TCM symptom scores （P<0.05）， increased SF-12 physical component summary （PCS） and mental component summary （MCS） scores （P<0.05）. After treatment， the whole blood high shear viscosity， middle shear viscosity， low shear viscosity， PV， and FIB decreased in the observation group （P<0.05）， while they did not show significant variations in the control group. After treatment， both groups of patients showed reductions in TNF-α， IL-6， and IL-1β levels and an elevation in the TGF-β₁ level （P<0.05）. Compared with the control group after treatment， the observation group showed decreases in VAS， ODI， TCM symptom scores and main symptom scores （P<0.05）， no significant differences in the secondary symptom scores， increased PCS and MCS scores （P<0.05）. The observation group outperformed the control group in terms of recovering whole blood high shear viscosity， middle shear viscosity， low shear viscosity， PV， FIB， TNF-α， IL-6， IL-1β， and TGF-β₁ （P<0.05）. The total response rate in the observation group was 97.5% （40/41）， which was higher than that （88.1%， 37/42） in the control group （P<0.05）. No serious adverse reaction was observed in the two groups during the observation period. One case in the observation group showed subcutaneous bruising on the lower limbs， which gradually disappeared after withdrawal. ConclusionQishao Huoxue prescription demonstrated definite effect in treating lumbar disc herniation due to qi stagnation and blood stasis by recovering hemorheological parameters and inhibiting the expression of inflammatory mediators in the serum without inducing adverse reactions. It is worth applying in clinical practice.

At present, the main treatment for differentiated thyroid carcinoma (DTC) in clinical practice is surgery combined with 131I therapy and TSH suppression therapy. The view that TSH suppression therapy after DTC surgery can significantly reduce the recurrence rate of tumors by initially controlling TSH in high-risk patients below 0.1 mU/L has become a widely accepted clinical practice. However, there is no significant additional benefit from excessive TSH suppression in low-risk patients. Currently, there is still controversy in clinical practice regarding the optimal degree of TSH suppression, whether to perform TSH suppression therapy, and the appropriate timing for TSH suppression therapy in middle-low-risk patients. Moreover, long-term TSH suppression therapy after surgery also brings many side effects. Therefore, this review will summarize the rational use of drugs, adjustment of drug dosage, and individualized TSH suppression therapy plan for low-risk DTC patients after surgery.

Objective:To investigate beam distribution characteristics through a phantom with conventional or extended collimators designed based on conventional collimators in boron neutron capture therapy (BNCT).Methods:By Monte Carlo simulation, we calculated the neutron beam distributions along the beam direction with a conventional collimator, 5 cm-extended collimator, and 10 cm-extended collimator; calculated the irradiation time and average depth using 10 cm-extended collimators with no air gap comprised of lithium fluoride (LiF)+ polyethylene or boron carbide (B 4C)+ polyethylene at different mass ratios; and calculated the irradiation time, advantage depth, and off-axis dose with conventional or extended collimators at without air gap or certain air gaps. Results:For the 10 cm-extended collimator without air gap, the thermal neutron flux density, gamma ray dose rate, and fast neutron dose rate were highest, and their peaks were 1.0×10 9 n/(cm 2·s), 5.3 cGy/min, and 9.1 cGy/min, respectively. Collimators comprised of polyethylene and LiF were superior to those of polyethylene and B4C in advantage depth and irradiation time. For five types of collimators made of polyethylene and LiF, the combination of 20 wt% polyethylene and 80 wt% LiF exhibited the greatest advantage depth (8.7 cm), but with a longer irradiation time (20.5 minutes); and the combination of 80 wt% polyethylene and 20 wt% LiF achieved the shortest irradiation time (19.0 minutes), with an advantage depth of 8.5 cm. Compared with the conventional collimator, the use of 5 cm- and 10 cm-extended collimators reduced treatment time by 26.4% and 40.3%, respectively, with small changes in advantage depth; and for the same collimator, the off-axis dose increased with the increase in the air gap. Conclusions:The use of 5 cm- and 10 cm-extended collimators can increase neutron beam intensity and reduce irradiation time, with a small impact on advantage depth and off-axis dose, which can solve the problem of prolonged treatment time caused by an air gap between patient's tumor surface and the beam aperture when head and neck movement is limited. BNCT can be equipped with appropriate extended collimators according to actual clinical needs.

Myocardial ischemia/reperfusion injury(MIRI)occurs after cardiopulmonary bypass open heart surgery,cardiovascular intervention and thrombolytic therapy,which is the most important cause of cardiac insufficiency,heart fail-ure,and even death in patients after treatment.In recent years,studies have found that the release of endogenous active peptides can alleviate the production of MIRI,and regulating the function and action of endogenous peptides may be one of the most effective ways to treat MIRI.Dipeptidyl peptidase 4(DPP4)is an important serine protease in mammals,with enzymatic activity to hydrolyze endogenous peptides.Its primary physiological function is to metabolize short peptides,in-cluding growth factors,hormones,etc.This review aims to better understand and search for effective therapeutic targets by elucidating the impact of DPP4 on the hydrolysis of endogenous peptides in MIRI,and ultimately provide new ideas for the therapeutic effects of MIRI.

OBJECTIVE: To review the research progress of design of bone scaffolds with different single cell structures. METHODS: The related literature on the study of bone scaffolds with different single cell structures at home and abroad in recent years was extensively reviewed, and the research progress was summarized. RESULTS: The single cell structure of bone scaffold can be divided into regular cell structure, irregular cell structure, cell structure designed based on topology optimization theory, and cell structure designed based on triply periodic minimal surface. Different single cell structures have different structural morphology and geometric characteristics, and the selection of single cell structure directly determines the mechanical properties and biological properties of bone scaffold. It is very important to choose a reasonable cell structure for bone scaffold to replace the original bone tissue. CONCLUSION Bone scaffolds have been widely studied, but there are many kinds of bone scaffolds at present, and the optimization of single cell structure should be considered comprehensively, which is helpful to develop bone scaffolds with excellent performance and provide effective support for bone tissue.
Bone and Bones ; Tissue Scaffolds

OBJECTIVE: To summarize the influence of microstructure on performance of triply-periodic minimal surface (TPMS) bone scaffolds. METHODS: The relevant literature on the microstructure of TPMS bone scaffolds both domestically and internationally in recent years was widely reviewed, and the research progress in the imfluence of microstructure on the performance of bone scaffolds was summarized. RESULTS: The microstructure characteristics of TPMS bone scaffolds, such as pore shape, porosity, pore size, curvature, specific surface area, and tortuosity, exert a profound influence on bone scaffold performance. By finely adjusting the above parameters, it becomes feasible to substantially optimize the structural mechanical characteristics of the scaffold, thereby effectively preempting the occurrence of stress shielding phenomena. Concurrently, the manipulation of these parameters can also optimize the scaffold's biological performance, facilitating cell adhesion, proliferation, and growth, while facilitating the ingrowth and permeation of bone tissue. Ultimately, the ideal bone fusion results will obtain. CONCLUSION The microstructure significantly and substantially influences the performance of TPMS bone scaffolds. By deeply exploring the characteristics of these microstructure effects on the performance of bone scaffolds, the design of bone scaffolds can be further optimized to better match specific implantation regions.
Tissue Scaffolds/chemistry* ; Tissue Engineering/methods* ; Bone and Bones ; Porosity

Orthopedic robots, as intelligent medical devices, have achieved good outcomes in clinical application in some orthopedic surgeries. Artificial intelligence (AI) has played an important role in the development of orthopedic robots due to its powerful capabilities of information processing and decision-making. The developing trends of orthopedic robotics are automation and intelligentization. Since AI has demonstrated great advantages in preoperative planning, an increasing number of researchers have been devoted to AI application in intraoperative navigation by an orthopedic robot. This paper outlines the exploratory efforts in applying AI technology to the intraoperative navigation assisted by an orthopedic robot, describes the advantages of AI in improving accuracy and reducing radiation, and forecasts research prospects in application of AI technology to orthopedic robots based on the current situation.

To summarize the progress in BNCT dose verification method in the world and discusses their development prospects. Boron neutron capture therapy (BNCT) utilizes the specific capture reaction between the neutrons and boron drugs enriched in tumor cells to selectively kill tumor cells. In order to verify the accuracy of the radiotherapy plan and ensure the therapeutic effect on patients, it is necessary to measure the dose before treatment and compare the experimental radiation dose with the planned dose. The current BNCT dose measurement method mainly include point dose measurement method based on ionization chambers, thermoluminescence dosimeters and activation foils, two-dimensional dose measurement method based on films, and three-dimensional dose measurement method based on gel dosimeters.