Objective: To explore the longitudinal relationships between sleep problems and non suicidal self injury (NSSI) behaviors in college students, so as to provide a theoretical basis for the prevention and intervention of NSSI. Methods: In October 2023 (T1), a total of 1 009 college students from two provincial colleges in Guangdong were selected by using a combination of convenience sampling and stratified cluster random sampling for a 1 year follow up survey (October 2024, T2). The students were assessed by using the Insomnia Severity Index(ISI), Non restorative Sleep Scale(NRSS), Epworth Sleepiness Scale (ESS), and Adolescent Non suicidal Self injury Assessment Questionnaire(ANSAQ). Data analysis was performed using McNemar’s test and Logistic regression. Results: The detection rate of NSSI behaviors was 18.83% at T1 and decreased to 7.73% at T2, with a statistically significant difference ( χ 2=66.24, P <0.01). The trajectories of NSSI behaviors were divided into persistent group (4.06%), new onset group (3.67%), remission group (14.77%), and resistance group (77.50%). Logistic regression analysis showed that sleep less than 7 hours per day at night, insomnia (mild, moderate to severe), non restorative sleep (moderate, severe), daytime sleepiness, and weekly nightmare frequency (1-2, ≥3 times) were associated with NSSI behaviors at T1 ( OR =5.02, 2.39, 5.51, 3.47, 9.70, 2.36, 2.63, 4.74, all P <0.01). Insomnia (mild, moderate to severe), severe non restorative sleep, daytime sleepiness, and weekly nightmares ≥3 times at T1 all increased the risk of NSSI behaviors at T2 ( OR =1.76, 4.15, 4.05, 1.88, 5.63, all P < 0.05 ). Moderate to severe insomnia, severe non restorative sleep, daytime sleepiness, and weekly nightmares ≥3 times at T1 increased the risk of belong to the new onset NSSI group ( OR =5.05, 3.37, 2.08, 5.86, all P <0.05). Conclusions Insomnia, non restorative sleep, daytime sleepiness, and frequent nightmares are important risk factors for NSSI behaviors among college students. Early assessment and intervention of sleep problems may be an important strategy for the prevention and treatment of NSSI.

Objective:To explore the relationship between mobile phone addiction and self-injurious behavior among college students, as well as the mediating effect of rumination and the moderating effect of non-restorative sleep.Methods:In December 2024, a questionnaire survey was conducted among 4 560 students from three universities in Guangdong, using the mobile phone addiction index, ruminative responses scale, non-restorative sleep scale(NRSS) and adolescent non-suicidal self-injury assessment questionnaire. Data analysis was performed using SPSS 29.0 software and the PROCESS v4.2 macro program, with the Bootstrap method used to test mediating and moderating effects.Results:The prevalence of mobile phone addiction among college students was 34.5%(1 572/4 560), and the prevalence of self-injurious behavior was 14.8%(673/4 560). The detection rate of self-injurious behavior in college students with mobile phone addiction (21.2%, 333/1 572) was higher than that in students without mobile phone addiction (11.4%, 340/2 988) ( χ2=78.71, P<0.01). Compared with students without mobile phone addiction, the college students with mobile phone addiction had statistically significant differences in scores of rumination ((44.19±14.24), (35.93±12.37), t=19.47, P<0.01)) and NRSS ((40.63±5.64), (45.12±5.84), t=-24.97, P<0.01)). Analysis of the students with mobile phone addiction showed that the degree of mobile phone addiction was positively correlated with rumination ( r=0.33, P<0.01) and self-injurious behavior( r=0.13, P<0.01). Rumination was positively correlated with self-injurious behavior( r=0.32, P<0.01). The total score of NRSS was negatively correlated with mobile phone addiction ( r=-0.29, P<0.01), rumination ( r=-0.37, P<0.01), and self-injurious behavior ( r=-0.26, P<0.01). Mobile phone addiction had a positive predictive effect on self-injurious behavior( β=0.30, P<0.01). Rumination partially mediated the relationship between mobile phone addiction and self-injurious behavior, with a mediating effect size of 0.15, accounting for 50.00%(0.15/0.30) of the total effect. Non-restorative sleep moderated the first stage of the pathway through which mobile phone addiction affected self-injurious behavior via rumination. When non-restorative sleep was more severe, the positive predictive effect of mobile phone addiction on rumination was significantly strengthened ( βsimple=0.45, P<0.01, 95% CI=0.37-0.53). Non-restorative sleep also moderated the second stage of the pathway through which mobile phone addiction affected self-injurious behavior via rumination. When non-restorative sleep was more severe, the positive predictive impact of rumination on self-injurious behavior became significantly stronger ( βsimple=0.29, P<0.01, 95% CI=0.20-0.38). Conclusion:Mobile phone addiction exacerbates rumination, thereby increasing the risk of self-injurious behavior among college students. This effect is stronger among students with severe non-restorative sleep.

Objective:To explore the relationship between mobile phone addiction and self-injurious behavior among college students, as well as the mediating effect of rumination and the moderating effect of non-restorative sleep.Methods:In December 2024, a questionnaire survey was conducted among 4 560 students from three universities in Guangdong, using the mobile phone addiction index, ruminative responses scale, non-restorative sleep scale(NRSS) and adolescent non-suicidal self-injury assessment questionnaire. Data analysis was performed using SPSS 29.0 software and the PROCESS v4.2 macro program, with the Bootstrap method used to test mediating and moderating effects.Results:The prevalence of mobile phone addiction among college students was 34.5%(1 572/4 560), and the prevalence of self-injurious behavior was 14.8%(673/4 560). The detection rate of self-injurious behavior in college students with mobile phone addiction (21.2%, 333/1 572) was higher than that in students without mobile phone addiction (11.4%, 340/2 988) ( χ2=78.71, P<0.01). Compared with students without mobile phone addiction, the college students with mobile phone addiction had statistically significant differences in scores of rumination ((44.19±14.24), (35.93±12.37), t=19.47, P<0.01)) and NRSS ((40.63±5.64), (45.12±5.84), t=-24.97, P<0.01)). Analysis of the students with mobile phone addiction showed that the degree of mobile phone addiction was positively correlated with rumination ( r=0.33, P<0.01) and self-injurious behavior( r=0.13, P<0.01). Rumination was positively correlated with self-injurious behavior( r=0.32, P<0.01). The total score of NRSS was negatively correlated with mobile phone addiction ( r=-0.29, P<0.01), rumination ( r=-0.37, P<0.01), and self-injurious behavior ( r=-0.26, P<0.01). Mobile phone addiction had a positive predictive effect on self-injurious behavior( β=0.30, P<0.01). Rumination partially mediated the relationship between mobile phone addiction and self-injurious behavior, with a mediating effect size of 0.15, accounting for 50.00%(0.15/0.30) of the total effect. Non-restorative sleep moderated the first stage of the pathway through which mobile phone addiction affected self-injurious behavior via rumination. When non-restorative sleep was more severe, the positive predictive effect of mobile phone addiction on rumination was significantly strengthened ( βsimple=0.45, P<0.01, 95% CI=0.37-0.53). Non-restorative sleep also moderated the second stage of the pathway through which mobile phone addiction affected self-injurious behavior via rumination. When non-restorative sleep was more severe, the positive predictive impact of rumination on self-injurious behavior became significantly stronger ( βsimple=0.29, P<0.01, 95% CI=0.20-0.38). Conclusion:Mobile phone addiction exacerbates rumination, thereby increasing the risk of self-injurious behavior among college students. This effect is stronger among students with severe non-restorative sleep.

Porcine reproductive and respiratory syndrome virus(PRRSV)mainly causes sow abor-tion,stillbirth,mummified fetus and respiratory symptoms in piglets.Since first reported in China in 1996,the virus complexity has increased significantly in more than 20 years of genetic evolution,bringing huge economic losses to the pig industry.In recent years,with the emergence of various PRRSV recombinant virus strains,preventing and controlling this epidemic became increasingly difficult.The purpose of this article is to comprehensively review the genome structure and func-tion of PRRSV,RNA virus recombination mechanism,main types of recombination,and the epi-demic status and recombination for the dominant epidemic PRRSV strains,in order to provide clues for in-depth research on gene recombination of PRRSV,thus providing the theoretical sup-port for formulating scientific prevention and control strategies.

Porcine reproductive and respiratory syndrome virus(PRRSV)mainly causes sow abor-tion,stillbirth,mummified fetus and respiratory symptoms in piglets.Since first reported in China in 1996,the virus complexity has increased significantly in more than 20 years of genetic evolution,bringing huge economic losses to the pig industry.In recent years,with the emergence of various PRRSV recombinant virus strains,preventing and controlling this epidemic became increasingly difficult.The purpose of this article is to comprehensively review the genome structure and func-tion of PRRSV,RNA virus recombination mechanism,main types of recombination,and the epi-demic status and recombination for the dominant epidemic PRRSV strains,in order to provide clues for in-depth research on gene recombination of PRRSV,thus providing the theoretical sup-port for formulating scientific prevention and control strategies.

In order to develop a positive quality control products for the detection of porcine repro-ductive and respiratory syndrome virus(PRRSV)nucleic acid by real-time fluorescent quantitative PCR(RT-qPCR),the positive quality control products of PRRSV-1 and PRRSV-2 M genes were prepared using armored RNA technology of MS2 phage.PRRSV-1 and PRRSV-2 M genes were amplified,purified and recovered,and ligated into pET28b vector containing MS2 mature enzyme protein gene and capsid protein.After transformed into BL21(DE3),the gene products were in-duced by IPTG and purified by PEG6000 precipitation method to prepare the armored RNA virus-like particles(AR-PRRSV)containing PRRSV M gene.Following the performance evaluation,as the positive quality control products of PRRSV-1 and PRRSV-2 M genes,AR-PRRSV1M and AR-PRRSV2M were calculated using YY/T 1652-2019 standard.Results showed that it had a good u-niformity,stable storage for the armored virus-like particles at-20,4,25 ℃ for 60 d,and 37 ℃ for 30 d.The prepared armored virus-like particles AR-PRRSV1M and AR-PRRSV2M were deter-mined by digital quantitative PCR(ddPCR)after preliminary quantification by RT-qPCR.The 104 copies/μL of AR-PRRSV1M and AR-PRRSV2M ddPCR fixation was(1.33+0.50)× 104 cop-ies/μL.The above results indicates that the AR-PRRSVM can be used as the quality control of the whole detection process(nucleic acid extraction,reverse transcription and RT-qPCR).

Objective:To explore the mediating effects of mindfulness and perceived stress between childhood trauma and psychotic-like experiences.Methods:In October 2021, 602 freshmen from a university in Guangdong Province were tested by childhood trauma questionnaire(CTQ), mindful attention awareness scale(MAAS), perceived stress scale(PSS), and community assessment of psychic experiences(CAPE). SPSS 21.0 and Mplus 8.3 were used for data analysis. Mann-Whitney U test was used to compare the differences between groups, and Spearman correlation analysis was used to investigate the correlation among childhood trauma, mindfulness, perceived stress and psychotic-like experiences. Bias-corrected nonparametric percentile Bootstrap method was used to examine the mediating roles of mindfulness and perceived stress between childhood trauma and psychotic-like experiences. Results:(1) In the past one month, 59.5% of the freshmen had psychotic-like experiences, and 8.5% of them experienced the distress. (2)Childhood trauma was positively correlated with perceived stress( r=0.29, P<0.01), frequency ( r=0.14, P<0.01)and distress( r=0.17, P<0.01) of psychotic-like experiences, and was negatively correlated with mindfulness( r=-0.28, P<0.01). (2)Mindfulness and perceived stress played individual mediating effects and chain mediating effect between childhood trauma and frequency of psychotic-like experiences, with effect size of 0.08, 0.04, 0.03, accounting for 53.33%, 26.67%, 20.00% of the total indirect effect(effect size=0.15), respectively. Mindfulness and perceived stress played individual mediating effects and chain mediating effect between childhood trauma and distress of psychotic-like experiences, with effect size of 0.07, 0.04, 0.03, accounting for 50.00%, 28.57%, 21.43% of the total indirect effect(effect size=0.14), respectively. Conclusion:Childhood trauma can affect psychotic-like experiences and distress through the indirect effects of mindfulness and perceived stress, or through the chain mediating effect of mindfulness-perceived stress.

Objective:To investigate the application of artificial intelligence based on the neural network radiation field in repair of soft tissue defects at lower limbs.Methods:A retrospective analysis was performed of the 23 patients who had been admitted to Department of Orthopedic Surgery, Renmin Hospital of Wuhan University from June 2020 to May 2022 for soft tissue defects at lower limbs. There were 14 males and 9 females, aged (38.6±6.7) years. Causes for soft tissue defects: traffic injury in 9 cases, benign or malignant primary soft tissue tumor in 6 cases, mechanical injury in 4 cases, crush injury in 2 cases, and chronic ulcer in 2 cases. Defect locations: the thigh in 3 cases, the lower leg in 7 cases, and the ankle and distal foot in 13 cases. The areas of soft tissue defect ranged from 6.0 cm×3.8 cm to 14.7 cm×12.8 cm. The defects were repaired and reconstructed by transplantation of an anterolateral femoral free flap in 7 cases and a pedicled flap in 16 cases with the assistance of artificial intelligence based on the neural network radiation field, a cutting-edge artificial intelligence algorithm that can quickly construct and process three-dimensional model images through volume rendering under the radiation field. The flap survival rate, aesthetic satisfaction before and after treatment, time for skin flap harvesting and transplantation, functional recovery of lower limbs and incidence of complications were recorded.Results:All the 23 patients were followed up for 32(28, 36) weeks. All the flaps were harvested smoothly and survived. The time for flap harvesting and transplantation was 65.8(50.0, 76.0) min. The aesthetic satisfaction scored (2.3±0.7) points before treatment and (8.4±1.6) points 4 weeks after treatment, showing a statistically significant difference ( P<0.05). The skin flaps healed well with no complications such as hematoma or infection in all but one patient who suffered from superficial necrosis at the distal skin flap due to venous crisis but healed with a scar. On average, the functional recovery of lower limbs scored 23.7(22.0, 25.0) points at 12 weeks after operation according to the Enneking evaluation system, and the functional recovery of lower limbs was 79% (23.7/30.0). Conclusion:Application of artificial intelligence based on the neural network radiation field can achieve ideal results in repair of soft tissue defects at lower limbs, due to its advantages of rapid and accurate surgical procedures, limited damage to the donor site, and a short learning curve.

With the global pandemic of COVID-19, cytokine storms in critical patients with pneumonia is really a problem and need to be solved immediately.Low dose radiation therapy (LDRT) has been temporarily used to treat pneumonia.In the past decades, researchers were dedicated to clarify the biological mechanism of LDRT.LDRT plays a unique role in the suppression of inflammation, preliminary outcomes have been acquired in critical patients with COVID-19 pneumonia, and radiotherapy community is paying attention to this treatment strategy.This review summarizes the application of LDRT in pneumonia, its biological mechanism, the result of LDRT in COVID-19 pneumonia, the existing problems and prospective in clinic.

Objective:To investigate the effect of mannose on the radiosensitivity of six human non-small cell lung cancer cell lines and its possible mechanism.Methods:The expression of mannose phosphate isomerase in six lung cancer cell lines were detected by Western blot. The inhibitory effect of mannose on the proliferation of lung cancer cell lines were observed by MTT assay. When irradiated with 0, 2, 4, 6, 8 and 10 Gy, the effect of mannose on the radiosensitivity of six lung cancer cell lines was detected by plate clone formation assay, respectively; and the apoptosis rates of normal control, mannose, irradiation and combined groups were detected by flow cytometry.Results:The expression levels of mannose phosphate isomerase were different among six lung cancer cell lines. Among them, A549 cells had the highest expression level and H460 cells showed the lowest expression level. When aD ministrated with 11.1 mmol/L mannose, the same inhibitory effect was observed on both A549 and H460 cell lines. Moreover, the inhibitory effect on H460 cell line was significantly increased with the increase of mannose concentration. In addition, aD ministration of 11.1 mmol/L mannose could significantly increase the radiosensitivity and apoptosis rate of H460 cell line. However, it exerted limited effect upon the radiosensitivity and apoptosis rate of A549 cell line. Conclusion:In six lung cancer cell lines with high expression of mannose phosphate isomerase, the aD ministration of mannose can enhance the radiosensitivity of partial tumors cells.