OBJECTIVES: To synthesize a temperature-responsive multimodal motion microrobot (MMMR) using temperature and magnetic field-assisted microfluidic droplet technology to achieve targeted drug delivery and controlled drug release. METHODS: Microfluidic droplet technology was utilized to synthesize the MMMR by mixing gelatin with magnetic microparticles. The microrobot possessed a magnetic anisotropy structure to allow its navigation and targeted drug release by controlling the temperature field and magnetic field. In the experiment, the MMMR was controlled to move in a wide range along a preset path by rotating a uniform magnetic field, and the local circular motion was driven by a planar rotating gradient magnetic field of different frequencies. The MMMR was loaded with simulated drugs, which were released in response to laser heating. RESULTS: Driven by a rotating magnetic field, the MMMR achieved linear motion following a predefined path. The planar gradient rotating magnetic field controlled circular motion of the MMMR with an adjustable radius, utilizing the centrifugal force generated by rotation. The drug-loaded MMMR successfully reached the target location under magnetic guidance, where the gelatin matrix was melted using laser heating for accurate drug release, after which the remaining magnetic particles were removed using magnetic field. CONCLUSIONS The MMMR possesses multimodal motion capabilities to enable precise navigation along a predefined path and dynamic regulation of drug release within the target area, thus having great potential for a wide range of biomedical applications.
Drug Delivery Systems/methods* ; Temperature ; Drug Liberation ; Magnetic Fields ; Robotics ; Gelatin/chemistry* ; Delayed-Action Preparations ; Microfluidics ; Motion

With the growing complexity and higher risk of modern warfare,artificial intelligence(AI)technologies have been increasingly used in the field of military medicine.This study investigates the innovative applications of AI in military medicine,focusing on practices in such countries as the United States,Israel and the United Kingdom.The research reveals that AI technologies have been extensively applied in battlefield medical training,casualty status monitoring,medical decision support and unmanned rescue operations.Through virtual reality simulation,intelligent decision support and vital sign monitoring technologies,AI has significantly improved the efficiency and precision of battlefield medical care.Despite challenges related to technological implementation,environmental adaptability and ethical controversies,future battlefield medical care will increasingly rely on unmanned systems and intelligent equipment to deliver efficient medical treatment through human-machine collaboration.

AIM:To investigate the role of ClC-3 chloride channel in the promotion of radio sensitization of na-sopharyngeal carcinoma CNE-2Z cells by dihydroartemisinin(DHA).METHODS:MTT was used to detect the inhibito-ry effect of DHA on the viability of CNE-2Z cells and normal nasopharyngeal epithelial NP69-SV40T cells,the radio sensi-tization effect of DHA on CNE-2Z cells was detected by cloning assay,the expression of ClC-3 protein was detected by Western blot,the expression of ClC-3 protein was down-regulated by siRNA technology,and the chlorine current of cells was recorded by whole cell patch-clamp technology.RESULTS:(1)Compared with NP69-SV40T cells,DHA selective-ly inhibited the proliferation of CNE-2Z cells,with IC10 values of(13.020±4.831)μmol/L and(5.244±1.050)μmol/L,respectively(P＜0.01).(2)The results of clonal formation experiments showed that DHA had a radio sensitizing effect on CNE-2Z cells,with a radio sensitization ratio of 1.9.(3)DHA could activate the chlorine channel of CNE-2Z cells and produce an outward chlorine current,but had no effect on the chlorine channel of NP69-SV40T cells.(4)DHA promoted the expression of ClC-3 chloric channel protein in CNE-2Z cells(P＜0.01).(5)Chlorine channel blocker NPPB could in-hibit the radio sensitizing effect of DHA on CNE-2Z cells by 1.84 times,and also inhibited the chlorine current activated by DHA.(6)the down-regulation of CNE-2Z ClC-3 protein could inhibit the radio sensitization effect of DHA on CNE-2Z cells by 4.19 times,and the activation of chlorine current by DHA on CNE-2Z cells was no longer produced.CONCLU-SION:DHA has a radio sensitizing effect on nasopharyngeal carcinoma CNE-2Z cells,which is likely to be related to the activation of ClC-3 chloride channel.

Objective:To investigate the features and influencing factors of language in children with various types of speech disorders.Methods:A case-control study was carried out, 262 children with speech disorder had been diagnosed at the language-speech clinic of the Center of Children′s Healthcare, Children′s Hospital, Capital Institute of Pediatrics from January 2021 to November 2023, the children with speech sound disorder as the speech sound disorder group, the children with developmental stuttering as the stuttering group. There were 100 typically-developed children who underwent physical checkups at the Center of Healthcare during the same period as the healthy group. All children experienced a standardized evaluation of language with diagnostic receptive and expressive assessment of mandarin‐comprehensive(DREAM-C) and questionnaire, One-way ANOVA and LSD test were conducted to compare the differences in overall language, receptive language, expressive language, semantics, and syntax scores among 3 groups of children. According to the results of DREAM-C, the children with speech disorder were divided into language normal group and language delay group. Chi‐square test and multivariate Logistic regression were implemented to analyze the association between the linguistic development of children with speech disorder and potential influential factors.Results:There were 145 children in the speech sound disorder group, including 110 males and 35 females respectively, with an age of (5.9±1.0) years; 117 children in the stuttering group, including 91 males and 26 females, with an age of (5.8±1.0) years; 100 children in the healthy group, including 75 males and 25 females, with an age of (5.7±1.2) years. The variations in overall language, expressive language, and syntax scores among 3 groups of children were statistically significant (92±18 vs.96±11 vs. 98±11, 81±18 vs. 84±14 vs. 88±13, 87±16 vs. 89±11 vs. 91±10, F=5.46, 4.69, 3.68, all P<0.05). Pairwise comparison revealed that the speech sound disorder group had lower scores in overall language, expressive language, and syntactic compared to the healthy group, and the differences were statistically significant (all P<0.01) and the overall language score was lower than that of children with stuttering ( P<0.05). In terms of overall language and expressive language, there was a statistically significant difference in the incidence of language delay among the three groups of children (15.9% (23/145) vs. 20.5% (24/117) vs. 7.0% (7/100), 46.2% (67/145) vs. 39.3% (46/117) vs. 26.0% (26/100); χ2=7.93, 10.28; both P<0.05). In terms of overall language, the stuttering group took up the highest proportion. In terms of expressive language, the speech sound disorder group accounted for the highest amount. The incidence of language delay in children with speech disorder was 44.3% (116/262). Non-parent-child reading, daily screen time ≥1 hour and screen exposure before 1.5 years of age are risk factors for the development of language in children with speech disorder ( OR=1.87, 2.18, 2.01; 95% CI 1.07-3.27, 1.23-3.86, 1.17-3.45; all P<0.01). Negative family history are protective factors for the progress of language ability ( OR=0.37, 95% CI 0.17-0.81, P<0.05). Conclusions:Children with speech disorder tend to have easy access to language delay, especially in expressive language and syntax. The occurrence of language delay in children with speech disorder is tightly connected with factors such as the family medical history, parent-child reading, screen time, etc. Attention should be paid to the development of language in children who suffer from speech disorder.

Objective To investigate the correlation between physical examination results and age of submariners,so as to provide scientific guidance for the health management of submariners.Methods A total of 331 submariners who underwent physical examination at a naval hospital in 2022 were selected for this research.There were 174 submariners aged≤26 years and 157 submariners aged>26 years.Physical examination results were statistically analyzed.Results Body mass index,basophil count,alanine aminotransferase,fasting blood glucose,total cholesterol,triglycerides,systolic blood pressure and diastolic blood pressure were positively correlated with age,while erythrocyte count and direct bilirubin were negatively correlated with age.The proportions of submariners aged>26 years with overweight,gallbladder polyps,elevated total cholesterol and elevated triglycerides were significantly higher than those aged≤26 years(P<0.05).The proportion of submariners aged>26 years with erythrocytosis was significantly lower than that of submariners aged≤26 years(P<0.05).Conclusion Some physical indicators of submariners are age-dependent,with older crews having higher incidences of overweight,gallbladder polyps and hyperlipidaemia.Individual health management measures should be developed for submariners with different ages.

Parvalbumin interneurons belong to the major types of GABAergic interneurons. Although the distribution and pathological alterations of parvalbumin interneuron somata have been widely studied, the distribution and vulnerability of the neurites and fibers extending from parvalbumin interneurons have not been detailly interrogated. Through the Cre recombinase-reporter system, we visualized parvalbumin-positive fibers and thoroughly investigated their spatial distribution in the mouse brain. We found that parvalbumin fibers are widely distributed in the brain with specific morphological characteristics in different regions, among which the cortex and thalamus exhibited the most intense parvalbumin signals. In regions such as the striatum and optic tract, even long-range thick parvalbumin projections were detected. Furthermore, in mouse models of temporal lobe epilepsy and Parkinson's disease, parvalbumin fibers suffered both massive and subtle morphological alterations. Our study provides an overview of parvalbumin fibers in the brain and emphasizes the potential pathological implications of parvalbumin fiber alterations.
Mice ; Animals ; Epilepsy, Temporal Lobe/pathology* ; Parvalbumins/metabolism* ; Parkinson Disease/pathology* ; Neurons/metabolism* ; Interneurons/physiology* ; Disease Models, Animal ; Brain/pathology*

Objective:To compare the efficacy and safety of pegylated liposomal Doxorubicin(PLD)and Epirubicin(EPI)as first-line chemotherapy for diffuse large B-cell lymphoma(DLBCL).Methods:Clinical data of DLBCL patients treated at Zhejiang Cancer Hospital from March 2013 to April 2018 were retrospectively collected.A total of 411 patients who had received first-line chemotherapy were included.Based on age, sex, Ann Arbor staging and other parameters and using the PSM method for 1∶1 matching, 151 patients were assigned into each of the PLD group and the EPI group.Efficacy and adverse events were compared between the PLD group and the EPI group.All patients were followed up for 3 years after treatment to monitor survival.Results:The complete response(CR)rate in the PLD group was 81.5%, and the CR rate in the EPI group was 72.2%.The objective response rate(ORR)of the PLD group was 98%, and the ORR of the EPI group was 96.7%.There was no significant difference in CR rate( χ2=0.478, P=0.489)or ORR between the two groups( χ2=0.007, P=0.934). In the PLD group, myelosuppression occurred in 25 cases(16.6%)and cardiotoxicity-related events in 21 cases(13.9%); in the EPI group, there were 24 cases(15.9%)of myelosuppression and the same number of cases of cardiotoxicity-related events, and there were no significant differences in myelosuppression( χ2=0.018, P=0.895)or cardiotoxicity( χ2=0.174, P=0.677)between the two groups.During the 3-year follow-up, the progression free survival(PFS)rates of the PLD group and the EPI group were 79.1% and 69.6%, respectively, with a statistically significant difference between the two groups( χ2=3.930, P=0.047). Both the PLD group and the EPI group had a 3-year OS rate of 85.2%, with no statistically significant difference between the two groups( χ2=0.402, P=0.538). Conclusions:The 3-year progression-free survival of DLBCL patients with PLD as first-line chemotherapy is significantly better than with EPI, and the 3-year overall survival, short-term efficacy and myelosuppression are comparable to those with EPI.

Objective    To compare the surgical results of ultrasound-guided percutaneous antegrade or retrograde therapy in the treatment of patent ductus arteriosus. Methods    The clinical data of 166 patients (44 males and 122 females) who underwent transthoracic echocardiography guided closure of patent ductus arteriosus in Xinjiang Cardiovascular and Cerebrovascular Disease Hospital from February 2016 to August 2020 were retrospectively analyzed, and the patients were divided into two groups: an antegrade group (n=60) and a retrograde group (n=106). The operation time, success rate, bed rest time, postoperative complications and surgical safety were compared between the two groups. Results    The immediate success rate of the two groups was 100.0%. Compared with the retrograde group, the antegrade group had shorter time of bed rest and hospital stay, but longer operation time. In the retrograde group, there were 2 patients of complications, including occlusive device falling off to pulmonary artery 12 hours after the operation in 1 patient, and false arterial tumor in 1 patient. Both groups were followed up for 3-18 months, and there was no death in the whole group. Conclusion    It is safe and effective to block patent ductus arteriosus under the guidance of transthoracic echocardiography. Although the operation process of anterior occlusion of patent ductus arteriosus is slightly complex and the operation time is long, the indication is wide, and the bed rest time is short. Therefore it can be used as the first choice for patent ductus arteriosus occlusion.

Objective    To investigate the clinical efficacy and application value of percutaneous interventional treatment for structural heart diseases under guidance of ultrasound. Methods    The clinical data of 1 010 patients with structural heart diseases treated by transcutaneous ultrasound-guided occlusion in our hospital from December 2, 2015 to December 31, 2019 were retrospectively reviewed, including 360 males and 650 females, aged 1-50 years. There were 692 patients of atrial septal defect (603 with central type, 9 combined with arterial catheter, 80 with ethmoid type), 116 patent foramen ovale, 25 ventricular septal defects (3 combined with atrial septal defect), 132 patent ductus arteriosus, 32 pulmonary valve stenosis (3 combined with atrial defect), 1 main pulmonary artery window, and 3 aneurysm rupture of aortic sinus. All patients were diagnosed by transthoracic echocardiography (TTE) before operation. Treatment was accomplished intraoperatively through TTE or transesophageal echocardiography (TEE) via the femoral artery or femoral vein. After operation, echocardiography, electrocardiogram and chest radiograph were reexamined. Results    Satisfactory results were obtained in 1 005 patients, and 1 patient failed to seal the ventricular defect and was repaired under direct vision, occluder detachment occurred in 5 patients after operation (3 patients of atrial septal defects underwent thoracotomy for Amplatzer device and were repaired, 1 patient of atrial septal defects was closed after removing Amplatzer device, 1 patient of patent ductus arteriosus underwent thoracotomy for Amplatzer device and was sutured), mild pulmonary valve regurgitation occurred after balloon dilation in 2 patients with pulmonary stenosis, a small amount  of residual shunt was found in 2 patients with ventricular defect, which disappeared after 3 months of follow-up, and 1 patient of right bundle branch block occurred and disappeared after 1 week. After follow-up of 1-24 months, 3 patients of ethmoidal atrial septal defect were reexamined with mild shunt. The occluder was in good position and the pressure difference of pulmonary valve was significantly reduced. There was no complication such as hemolysis, arrhythmia, embolism or rupture of chordae tendinae. Conclusion    Percutaneous transfemoral artery and vein guided by TTE or TEE is safe and effective, with little trauma, no radiation or contrast agent damage, and has significant clinical efficacy and application values.