Objective:The SF-36 Scale was utilized to compare the differences in the dimensions of survival quality between subway microwave contact personnel and administrative personnel to provide a scientific basis for improving the quality of life of microwave contact personnel.Methods:In October 2023, 264 occupational personnel exposed to microwaves were selected as the microwave exposure group, and 104 administrative personnel not exposed to microwaves in a railroad enterprise were selected as the administrative control group. The self-administered basic data questionnaire and SF-36 Scale were applied to investigate the basic conditions, daily behaviors and survival quality of the research objects. And the microwave exposure doses of each post were measured. The differences in basic conditions, daily behaviors and survival quality of the microwave exposure group and the administrative control group were analyzed. And logistic regression was used to analyze the influencing factors of survival quality in the microwave exposure group.Results:There were significant differences in gender, age, marital status, smoking status and sleep status between the microwave exposure group and the administrative control group ( P<0.05) . The microwave exposure group had lower scores than the administrative control group in the six dimensions of role physical, body pain, general health, vitality, social function, mental health and SF-36 average total score, and had higher score in reported health transition ( P<0.05) . The logistic regression analysis showed that the probability of low total SF-36 score in microwave exposure group with bachelor's degree or above was 0.46 times that of junior college degree (95% CI: 0.24-0.90, P=0.023) . The probability of low total SF-36 score in microwave exposure group with exercised 4 or more times per week was 4.27 times that of those who never or occasionally exercised (95% CI: 1.41-13.00, P=0.010) . The probabilities of low total SF-36 score in microwave exposure group with sleep light and dream, wake up in the middle night and hard to fall asleep were 11.04 and 7.38 times higher than those without sleep disturbance (95% CI: 3.35-36.32, P<0.001; 95% CI: 1.42-38.50, P=0.018) . The probability of low total SF-36 score in microwave exposure group with daily dose of 1.74 μW·h/cm 2 was 1.75 times that of the daily dose of 1.02 μW·h/cm 2 (95% CI: 1.08-3.82, P=0.008) . Conclusion:The education level, physical exercise, sleep status and microwave exposure dose are important factors affecting the survival quality of microwave exposed personnel. Occupational health education and behavioral life intervention should be strengthened to improve their survival quality.

Objective:To investigate the effects and mechanisms of subchronic exposure to pyrethrin on the mice nervous system.Methods:Twenty-four male mice were randomly divided into a control group,low-,medium-,and high-dose groups,and were exposed continuously for 28 days.The control group received corn oil.The general condi-tion of the mice was observed,and the body weight and brain organ coefficient were measured.Neurobehavioral tests were conducted after the exposure period.The histopathological changes of the hippocampus in mice were observed by HE and nissl staining.The activities of lactate dehydrogenase(LDH),superoxide dismutase(SOD),catalase(CAT)and the contents of malondialdehyde(MDA),glutathione(GSH),acetylcholine(ACh)and glutamate(Glu)in brain tissue of mice were detected by biochemical kit.The Western blot was employed to measure the expression levels of kelch-like ech-associated protein 1(Keap1),nuclearfactorerythroid2-relatedfactor2(Nrf2),and heme oxygenase 1(HO-1)in brain tissue of mice.Results:Compared with the control group,the body weight of the mice in the high-dose group decreased,the brain organ coefficient increased,and the neurological function test showed that the mice had reduced autonomic activity,delayed nerve reflex,and impaired sensory and motor function.Histopathology showed that the hippocampal neurons in the middle-and high-dose groups presented with pyknosis,vacuolization,and disordered arrangement of the CA3 area.Biochemical analysis indicated that in the brain tissue of mice,the activity of LDH and the content of MDA were increased in the medium-and high-dose groups,while the activity of CAT and the content of GSH were decreased.The content of Glu was increased and the content of ACh was decreased.The activity of SOD was reduced in the low-,medium-,and high-dose groups.Western blot analysis showed that the expression of HO-1 and Nrf2 protein in the brain tissue of mice in the middle-and high-dose groups was down-regulated,while the expression of Keap1 protein in the high-dose group was up-regulated.Conclusion:Pyrethrin may cause damage to the nervous system by affecting the Keap1/Nrf2/HO-1 signaling pathway and neurotransmitter levels.

Objective:To investigate the effects and mechanisms of subchronic exposure to pyrethrin on the mice nervous system.Methods:Twenty-four male mice were randomly divided into a control group,low-,medium-,and high-dose groups,and were exposed continuously for 28 days.The control group received corn oil.The general condi-tion of the mice was observed,and the body weight and brain organ coefficient were measured.Neurobehavioral tests were conducted after the exposure period.The histopathological changes of the hippocampus in mice were observed by HE and nissl staining.The activities of lactate dehydrogenase(LDH),superoxide dismutase(SOD),catalase(CAT)and the contents of malondialdehyde(MDA),glutathione(GSH),acetylcholine(ACh)and glutamate(Glu)in brain tissue of mice were detected by biochemical kit.The Western blot was employed to measure the expression levels of kelch-like ech-associated protein 1(Keap1),nuclearfactorerythroid2-relatedfactor2(Nrf2),and heme oxygenase 1(HO-1)in brain tissue of mice.Results:Compared with the control group,the body weight of the mice in the high-dose group decreased,the brain organ coefficient increased,and the neurological function test showed that the mice had reduced autonomic activity,delayed nerve reflex,and impaired sensory and motor function.Histopathology showed that the hippocampal neurons in the middle-and high-dose groups presented with pyknosis,vacuolization,and disordered arrangement of the CA3 area.Biochemical analysis indicated that in the brain tissue of mice,the activity of LDH and the content of MDA were increased in the medium-and high-dose groups,while the activity of CAT and the content of GSH were decreased.The content of Glu was increased and the content of ACh was decreased.The activity of SOD was reduced in the low-,medium-,and high-dose groups.Western blot analysis showed that the expression of HO-1 and Nrf2 protein in the brain tissue of mice in the middle-and high-dose groups was down-regulated,while the expression of Keap1 protein in the high-dose group was up-regulated.Conclusion:Pyrethrin may cause damage to the nervous system by affecting the Keap1/Nrf2/HO-1 signaling pathway and neurotransmitter levels.

Objective To investigate the effect of Astragalus polysaccharides(APS)on ventricular remodeling in mice with dilated cardiomyopathy(DCM)based on the cyclic guanosine monophosphate-adenosine monophosphate synthase(cGAS)/stimu-lator of interferon gene(STING)pathway.Methods The cTnTR141w transgenic DCM mice were randomly assigned into DCM group,APS low-dose group,APS high-dose group,Captopril group,and APS high-dose+cG AS STING pathway activator(Roc A)group,each with 12 mice.A total of 12 C57BL/6J mice were designated as control group.Each group was administered the corresponding drugs,once a day for 8 weeks.The left ventricular end diastolic diameter(LVEDD),left ventricular ejection frac-tion(LVEF),and left ventricular end systolic diameter(LVESD)of mice were measured.ELISA was used to detect serum crea-tine kinase(CK)and troponin T(cTn-T).The mouse heart mass index and left ventricular mass index were measured.Masson staining was used to detect myocardial tissue fibrosis.ELISA was used to test interleukin(IL)-10,tumor necrosis factor-a(TNF-α),and IL-6 in myocardial tissue.Western blot was used to test cGAS and STING proteins in myocardial tissue.Results The a-mount of blue stained myocardial fibers generated in the myocardium was increased,the LVEDD,LVESD,serum CK and cTn-T levels,cardiac mass index,left ventricular mass index,myocardial tissue TNF-α and IL-6 levels,and cGAS and STING proteins were elevated,while the LVEF and myocardial tissue IL-10 were decreased in the DCM group as compared with those in the control group(all P＜0.05).Compared with the DCM group,the generation of blue stained myocardial fibers in the myocardium of mice decreased,the LVEDD,LVESD,serum CK and cTn-T levels,cardiac mass index,left ventricular mass index,myocardial tissue TNF-α and IL-6 levels,and cGAS and STING proteins were reduced,while the LVEF and myocardial tissue IL-10 were increased in the APS low-and high-dose groups,and Captopril group(all P＜0.05).Compared with the high-dose APS group,the generation of blue stained myocardial fibers in the myocardium of mice increased,the LVEDD,LVESD,serum CK and cTn-T levels,cardiac mass index,left ventricular mass index,myocardial tissue TNF-α and IL-6 levels,and cGAS and STING pro-teins were elevated,while the LVEF and myocardial tissue IL-10 were reduced in the high-dose APS+Roc A group(all P＜0.05).Conclusion The mechanism by which APS inhibits inflammation and improves ventricular remodeling in DCM mice may be related to the inhibition of cGAS/STING pathway.

Objective To investigate the effect of Astragalus polysaccharides(APS)on ventricular remodeling in mice with dilated cardiomyopathy(DCM)based on the cyclic guanosine monophosphate-adenosine monophosphate synthase(cGAS)/stimu-lator of interferon gene(STING)pathway.Methods The cTnTR141w transgenic DCM mice were randomly assigned into DCM group,APS low-dose group,APS high-dose group,Captopril group,and APS high-dose+cG AS STING pathway activator(Roc A)group,each with 12 mice.A total of 12 C57BL/6J mice were designated as control group.Each group was administered the corresponding drugs,once a day for 8 weeks.The left ventricular end diastolic diameter(LVEDD),left ventricular ejection frac-tion(LVEF),and left ventricular end systolic diameter(LVESD)of mice were measured.ELISA was used to detect serum crea-tine kinase(CK)and troponin T(cTn-T).The mouse heart mass index and left ventricular mass index were measured.Masson staining was used to detect myocardial tissue fibrosis.ELISA was used to test interleukin(IL)-10,tumor necrosis factor-a(TNF-α),and IL-6 in myocardial tissue.Western blot was used to test cGAS and STING proteins in myocardial tissue.Results The a-mount of blue stained myocardial fibers generated in the myocardium was increased,the LVEDD,LVESD,serum CK and cTn-T levels,cardiac mass index,left ventricular mass index,myocardial tissue TNF-α and IL-6 levels,and cGAS and STING proteins were elevated,while the LVEF and myocardial tissue IL-10 were decreased in the DCM group as compared with those in the control group(all P＜0.05).Compared with the DCM group,the generation of blue stained myocardial fibers in the myocardium of mice decreased,the LVEDD,LVESD,serum CK and cTn-T levels,cardiac mass index,left ventricular mass index,myocardial tissue TNF-α and IL-6 levels,and cGAS and STING proteins were reduced,while the LVEF and myocardial tissue IL-10 were increased in the APS low-and high-dose groups,and Captopril group(all P＜0.05).Compared with the high-dose APS group,the generation of blue stained myocardial fibers in the myocardium of mice increased,the LVEDD,LVESD,serum CK and cTn-T levels,cardiac mass index,left ventricular mass index,myocardial tissue TNF-α and IL-6 levels,and cGAS and STING pro-teins were elevated,while the LVEF and myocardial tissue IL-10 were reduced in the high-dose APS+Roc A group(all P＜0.05).Conclusion The mechanism by which APS inhibits inflammation and improves ventricular remodeling in DCM mice may be related to the inhibition of cGAS/STING pathway.

Objective:The SF-36 Scale was utilized to compare the differences in the dimensions of survival quality between subway microwave contact personnel and administrative personnel to provide a scientific basis for improving the quality of life of microwave contact personnel.Methods:In October 2023, 264 occupational personnel exposed to microwaves were selected as the microwave exposure group, and 104 administrative personnel not exposed to microwaves in a railroad enterprise were selected as the administrative control group. The self-administered basic data questionnaire and SF-36 Scale were applied to investigate the basic conditions, daily behaviors and survival quality of the research objects. And the microwave exposure doses of each post were measured. The differences in basic conditions, daily behaviors and survival quality of the microwave exposure group and the administrative control group were analyzed. And logistic regression was used to analyze the influencing factors of survival quality in the microwave exposure group.Results:There were significant differences in gender, age, marital status, smoking status and sleep status between the microwave exposure group and the administrative control group ( P<0.05) . The microwave exposure group had lower scores than the administrative control group in the six dimensions of role physical, body pain, general health, vitality, social function, mental health and SF-36 average total score, and had higher score in reported health transition ( P<0.05) . The logistic regression analysis showed that the probability of low total SF-36 score in microwave exposure group with bachelor's degree or above was 0.46 times that of junior college degree (95% CI: 0.24-0.90, P=0.023) . The probability of low total SF-36 score in microwave exposure group with exercised 4 or more times per week was 4.27 times that of those who never or occasionally exercised (95% CI: 1.41-13.00, P=0.010) . The probabilities of low total SF-36 score in microwave exposure group with sleep light and dream, wake up in the middle night and hard to fall asleep were 11.04 and 7.38 times higher than those without sleep disturbance (95% CI: 3.35-36.32, P<0.001; 95% CI: 1.42-38.50, P=0.018) . The probability of low total SF-36 score in microwave exposure group with daily dose of 1.74 μW·h/cm 2 was 1.75 times that of the daily dose of 1.02 μW·h/cm 2 (95% CI: 1.08-3.82, P=0.008) . Conclusion:The education level, physical exercise, sleep status and microwave exposure dose are important factors affecting the survival quality of microwave exposed personnel. Occupational health education and behavioral life intervention should be strengthened to improve their survival quality.

Objective To explore the potential influencing factors and complex pathways affecting rehabilitation effect for children with autism spectrum disorder(ASD)from the perspective of parental efficacy in doctor-patient communication,and to provide evidence for improving the quality of rehabilitation service for children with ASD. Methods An anonymous face-to-face questionnaire survey was conducted to collect general demographic information of parents of children with ASD at designated rehabilitation institutions in Gansu province.The data included paren-tal efficacy in doctor-patient communication,parental compliance of treatment and children's rehabilitation out-comes were collected.A structural equation model was used to explore the impact mechanism of parental commu-nication efficacy on the rehabilitation outcomes of children with ASD. Results Data from 519 parents at 37 rehabilitation institutions across 13 cities/counties in Gansu province were collect-ed.Significant positive correlations were found between parental efficacy in doctor-patient communication,doc-tor-patient relationships,parental compliance with treatment and rehabilitation outcomes for children with ASD(P＜0.05).Through structural equation model analysis,the standardized direct effect of children with ASD from parents'doctor-patient communication efficacy was 0.151(P=0.023).The mediating effect of doctor-patient rela-tionship and parental compliance with treatment were 0.160(P=0.001)and 0.111(P=0.001),respectively,with a chained mediating effect of 0.035(P=0.001).The pathway"parental efficacy in doctor-patient communica-tion → doctor-patient relationship → ASD child's rehabilitation outcome"accounted for the highest proportion of the total mediating effect,at 52.29%. Conclusion Parental doctor-patient communication efficacy may positively impact on the rehabilitation outcomes of chil-dren with ASD directly,and indirectly through the doctor-patient relationship and parental compliance with treat-ment.Rehabilitation institutions should focus on fostering parental communication skills and enhancing high-quality and humanized rehabilitation services.

Objective:Proximal femur tumor resection often leads to hip joint instability and functional loss.Various methods have been clinically applied to repair hip joint soft tissue function,but deficiencies remain.This study aims to evaluate the advantages and disadvantages of the ligament advanced reinforcement system(LARS)tumor tube in assisting soft tissue function reconstruction in patients undergoing tumor type artificial hip replacement surgery. Methods:This study included 85 patients(41 males,44 females)with proximal femoral tumors treated at the Xiangya Bone Tumor Treatment Center from January 2012 to January 2022,aged 10 to 79(38.5±18.2)years.Among them,13 cases had benign aggressive tumors,45 had primary malignant bone tumors,and 27 had bone metastases.Clinical data,imaging data,and intraoperative photos were collected.Patients were followed up and postoperative functional evaluations were conducted using the Musculoskeletal Tumor Society(MSTS)scoring system and Harris hip joint scoring system to assess limb function and hip joint function. Results:Preoperative pathological fractures were present in 37 cases(43.5％),with a lesion length of(9.4±2.9)cm.Among non-metastatic tumor patients,7 experienced postoperative recurrence,including 6 cases of osteosarcoma and 1 case of fibrosarcoma.Pulmonary metastases occurred in 9 osteosarcoma patients.Five patients required reoperation due to postoperative complications,including 3 cases of deep vein thrombosis,1 case of giant cell granuloma,and 1 case of prosthesis infection.Postoperatively,5 patients exhibited Trendelenburg gait,and 6 had leg length discrepancies.The postoperative MSTS score was 26.7±1.4,and the Harris score was 89.6±5.3. Conclusion:The LARS tumor tube can effectively assist in reconstructing the soft tissue function of the hip joint and greatly reduce postoperative complications,making it an effective technical improvement in joint function reconstruction in tumor type artificial hip replacement surgery.

Objective To explore the effect of Kangxian Yixin decoction on PKA/CaMKⅡ Signal Pathway and Mitochondrial membrane potential of cardiomyocyte hypertrophy in dilated cardiomyopathy rats.Methods Drinking furazolidone to duplicate the DCM rats model for 10 weeks,then the rats were checked by ultrasound,the successfully established model rats were randomly divided into model group,low dose Kangxian Yixin decoction group,middle dose Kangxian Yixin decoction group,high dose Kangxian Yixin decoction group and captopril group.Normal group was separated.After 4 weeks of drug intervention,This experiment was over,ATP,Ca2+-Mg2+-ATP enzymatic activity,CaMKⅡ,PKA and UCP2 mRNA were tested.H9c2 cardiomyocyte hypertrophy model was set up by norepinephrine,after 24 h of drug intervention,mitochondrial membrane potential was tested.Results Compared with the normal group,cardiomyocyte mitochondria were damaged in each model group,ATP,Ca2+-Mg2+-ATP enzymatic activity and PKA mRNA were lower,UCP2 mRNA and CaMKⅡ mRNA were higer,mitochondrial membrane potential obviously decreased(P<0.05 or P<0.01).The mitochondria were protected in every drug group,the tested indexes get well in different degree,especially in hige dose Kangxian Yixin decoction group(P<0.05 or P<0.01).Conclusion Kangxian Yixin decoction can reduce myocardial cell mitochondrial damage in model rats with DCM,improve myocardial cell energy metabolism and cardiac systolic and diastolic functions,one of the mechanisms may be optimizing PKA/CaMKⅡ signal pathway and improving mitochondrial membrane potential.

Objective:To explore the clinical application of portable head and neck magnetic resonance imaging (MRI) device in neurosurgery.Methods:A total of 213 patients with brain diseases who were scanned by portable head and neck MRI device in Center of Neurosurgery, Zhujiang Hospital, Southern Medical University from June to September 2022 were selected. The portable head and neck MRI images and 3.0T conventional MRI images of 10 randomly selected patients were compared; the differences in signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR) of different sequences were analyzed. Thirty-one patients accepted tracheal intubation/tracheotomy, or ventilator-assisted breathing were selected as special patient group, and another 30 patients were as general patient group; the differences in comprehensive diagnostic scores of portable head and neck MRI images were compared. Noise intensity differences in different sequences between 3.0T conventional MRI and portable head and neck MRI were statistically compared. Twenty hospitalized volunteers with normal hearing in our center from July to August 2022 were selected, conventional 3.0T MRI and portable head and neck MRI were performed successively, and the noise intensity of different sequences in them was evaluated by using a 5-point system.Results:Compared with those in 3.0T conventional MRI images, the SNR and CNR of T1WI, T2WI, and Liquid attenuated reverse recovery sequence (FLAIR) sequences in portable head and neck MRI images were significantly lower ( P<0.05). No significant difference was noted in the comprehensive diagnostic scores of portable head and neck MRI images between special patients and general patients ( P>0.05). Compared with that in the 3.0T conventional MRI, the noise intensity of different sequences in portable head and neck MRI was significantly reduced ( P<0.05). These volunteers had significantly reduced noise intensity scores of different sequences in portable head and neck MRI compared with that in conventional 3.0T MRI ( P<0.05). Conclusion:Portable head and neck MRI device is easy to use, enjoying high safety, imaging quality and suitability, which meets the clinical needs for neurosurgery patients.