Objective To investigate immunogenic and toxic effects of graphene oxide (GO) nanoparticles in mouse skeletal muscles and in human blood in vitro. Methods GO nanoparticles prepared using a probe sonicator were supended in deionized H2O or PBS, and particle size and surface charge of the nanoparticles were measured with dynamic light scattering (DLS). Different concentrations (0.5, 1.0 and 2.0 mg/mL) of GO suspension or PBS were injected at multiple sites in the gastrocnemius muscle (GN) of C57BL/6 mice, and inflammatory response and immune cell infiltrations were detected with HE and immunofluorescence staining. We also examined the effects of GO nanoparticles on human red blood cell (RBC) morphology, hemolysis and blood coagulation using scanning electron microscope (SEM), spectrophotometry, and thromboelastography (TEG). Results GO nanoparticles suspended in PBS exhibited better colloidal dispersity, stability and surface charge effects than those in deionized H2O. In mouse GNs, injection of GO suspensions dose- and time-dependently resulted in sustained muscular inflammation and myofiber degeneration at the injection sites, which lasted till 8 weeks after the injection; immunofluorescence staining revealed obvious infiltration of monocytes, macrophages, dendritic cells and CD4+T cells around the injection sites in mouse GNs. In human RBCs, incubation with GO suspensions at 0.2, 2.0 and 20 mg/mL, but not at 0.002 or 0.02 mg/mL, caused significant alterations of cell morphology and hemolysis. TEG analysis showed significant abnormalities of blood coagulation parameters following treatment with high concentrations of GO. Conclusion GO nanoparticles can induce sustained inflammatory and immunological responses in mouse GNs and cause RBC hemolysis and blood coagulation impairment, suggesting its muscular toxicity and hematotoxicity at high concentrations.

Objective To investigate immunogenic and toxic effects of graphene oxide (GO) nanoparticles in mouse skeletal muscles and in human blood in vitro. Methods GO nanoparticles prepared using a probe sonicator were supended in deionized H2O or PBS, and particle size and surface charge of the nanoparticles were measured with dynamic light scattering (DLS). Different concentrations (0.5, 1.0 and 2.0 mg/mL) of GO suspension or PBS were injected at multiple sites in the gastrocnemius muscle (GN) of C57BL/6 mice, and inflammatory response and immune cell infiltrations were detected with HE and immunofluorescence staining. We also examined the effects of GO nanoparticles on human red blood cell (RBC) morphology, hemolysis and blood coagulation using scanning electron microscope (SEM), spectrophotometry, and thromboelastography (TEG). Results GO nanoparticles suspended in PBS exhibited better colloidal dispersity, stability and surface charge effects than those in deionized H2O. In mouse GNs, injection of GO suspensions dose- and time-dependently resulted in sustained muscular inflammation and myofiber degeneration at the injection sites, which lasted till 8 weeks after the injection; immunofluorescence staining revealed obvious infiltration of monocytes, macrophages, dendritic cells and CD4+T cells around the injection sites in mouse GNs. In human RBCs, incubation with GO suspensions at 0.2, 2.0 and 20 mg/mL, but not at 0.002 or 0.02 mg/mL, caused significant alterations of cell morphology and hemolysis. TEG analysis showed significant abnormalities of blood coagulation parameters following treatment with high concentrations of GO. Conclusion GO nanoparticles can induce sustained inflammatory and immunological responses in mouse GNs and cause RBC hemolysis and blood coagulation impairment, suggesting its muscular toxicity and hematotoxicity at high concentrations.

β2-adrenergic receptor （β2-AR） agonists are widely used as first-line drugs in the treatment of bronchial asthma （hereinafter referred to as “asthma”）， but long-term use can lead to β2-AR desensitization and reduce its clinical efficacy， resulting in poor symptom control of some asthma patients. The mechanism of β2-AR desensitization induced by β2-AR agonists mainly includes slow hyposensitization （related to the decrease of β2-AR density in airway mucosa） and rapid hyposensitization （related to the mechanism of stimulatory G protein decoupling）. Cyclic adenosine monophosphate（cAMP）-protein kinase A and cAMP- exchange protein activated by cAMP signaling pathways are closely related to β2-AR desensitization. Glucocorticoids， peroxisome proliferator-activated receptor-gamma agonists， ASM-024， Chinese medicine monotherapies and formulations， when combined with β2-AR agonists， can improve the sensitivity of β2-AR， so as to better control asthma symptoms.

Bronchial asthma （referred to as “asthma”） is a heterogeneous airway disease characterized by chronic airway inflammation and airway remodeling. Its pathogenesis is complex， the incidence is high and the disease is easy to repeat. Autophagy plays an important regulatory role in improving asthma symptoms. By regulating autophagy-related proteins and signaling pathways， the active components of traditional Chinese medicine （such as flavonoids， anthraquinones， terpenoids） and traditional Chinese medicine compounds （such as Wuhu decoction， Pingchuan granule， Sanzi yangqin decoction） can inhibit airway inflammatory response，reduce airway hyperresponsiveness，and alleviate airway remodeling，thus playing a role in the treatment of asthma. However， most of the current studies are basic studies，and the quality of evidence is not high．In the future，high-quality clinical and basic studies should be further carried out to fully demonstrate the scientific nature of traditional Chinese medicine in the treatment of asthma by regulating autophagy．

Objective:To understand the use of post-exposure prophylaxis (PEP) and analyze related factors among men who have sex with men (MSM) in Qingdao, and provide a reference for the AIDS prevention and control in this population.Methods:A cross-sectional survey conducted from April 2022 to February 2023. Relying on MSM social groups in Qingdao, a snowball sampling method was applied to recruit research subjects who met the inclusion criteria of age ≥18 years old, having had homosexual anal or oral sex in the past six months, and HIV-negative or infection status unknown. The sample size was estimated at 566. Data on demographic characteristics, sexual behavior characteristics, PEP use, and others of the research subjects was collected through on-site questionnaires. The logistic regression model was used to analyze the factors associated with using PEP.Results:A total of 811 participants were recruited, mainly aged 25-34 (53.6%, 435/811), unmarried (74.7%, 606/811), with an average monthly income of ≥5 000 yuan (52.2%, 423/811), and having lived in Qingdao for ≥10 years (75.6%, 613/811). The proportion of those who knew the HIV status of their sexual partners in the last six months was 67.1% (544/811), and those with HIV-positive partners were 3.6% (29/811). In the last six months, the proportion of participants who had group sex (86.4%, 701/811), unprotected anal sex (98.2%, 796/811), and use of club drugs (80.3%, 651/811) was high. Moreover, 28.4% (230/811) had used PEP. The multivariate logistic regression analysis showed that the factors related to the use of PEP included divorced or widowed (a OR=5.46,95% CI:1.96-15.17), average monthly income ≥5 000 yuan (a OR=2.04,95% CI:1.44-2.89), same-sex sexual orientation (a OR=0.40,95% CI:0.22-0.71), having HIV-positive sexual partners in the last six months (a OR=2.54,95% CI:1.13-5.71) and having been tested for HIV ≥3 times in the last six months (a OR=1.46,95% CI:1.04-2.06). Conclusions:The prevalence of risk behaviors among MSM in Qingdao was high, and the use of PEP was low. In the future, it is essential to increase HIV/AIDS prevention education among MSM, promote MSM to know the HIV status of their sexual partners, and reduce the prevalence of risk behaviors among this population. Additionally, explore medical insurance reimbursement plans for PEP to reduce utilization costs and promote the use of PEP by MSM after HIV exposure occurs as soon as possible.

Objective:To understand and analyze the incidence of HIV infection in club drug abusers among men who have sex with men (MSM) in Qingdao and provide a reference for the prevention and intervention of this population.Methods:From March 2017 to July 2022, club drug abusers among MSM who are HIV-negative were recruited by snowball sampling of MSM social organizations in Qingdao, a prospective cohort was established, and a follow-up survey was conducted every six months, with the sample size estimated to be 436. The survey contents included demographic characteristics, sexual characteristics, AIDS knowledge awareness, club drug abuse, HIV testing, and other information. HIV infection was the outcome-dependent variable, and the interval between the recruitment into the cohort and the HIV infection was the time-dependent variable. Cox proportional hazards regression analysis was conducted to identify the related factors for HIV infection.Results:A total of 987 participants of club drug abusers among MSM were recruited during the baseline survey and 826 eligible participants were enrolled in this cohort. A total of 46 HIV infection cases were found, and the cumulative follow-up time was 1 960.68 person-years. The incidence of HIV infection was 2.35/100 person-years. The multivariate Cox regression analysis showed that <30 (a HR=3.04, 95% CI: 1.62-5.71) non-Shandong residents (a HR=2.29,95% CI:1.20-4.39) found their partners through offline (a HR=4.62,95% CI:2.05-10.41), homosexual sexual partners >4 (a HR=3.06,95% CI:1.59-5.88), condom broken during sex (a HR=2.24,95% CI:1.21-4.17) and hemorrhage sexual intercourse (a HR=2.56,95% CI:1.31-5.03) were significantly associated with HIV infection in this cohort. Conclusions:The incidence of HIV infection in club drug abusers among MSM in Qingdao is generally low, but knowledge and practice have separated, and the risk of HIV infection is high. The related factors of HIV infection included younger age, non-Shandong residents, finding their partners offline, multiple sexual partners, condom break during sex, and hemorrhage sexual intercourse; HIV-related behavioral intervention should be strengthened.

Objective:To understand the incidence of post-traumatic stress disorder(PTSD) in fathers with premature infants and analyze the risk factors.Methods:Conveniently, the 203 fathers of premature infants in NICU of Affiliated Hospital of Jining Medical University of Shandong Province from May to August 2021 were selected as the subjects to fill in the general data questionnaire, Perinatal Post-traumatic stress disorder Questionnaire-Chinese edition (PPQ-C), Parents, Perception of Uncertainty Scale, Social Support Rating Scale, Simplified Coping Style Questionnaire. Logistic regression was used to analyze the risk factors of PTSD and establish a nomogram model. ROC curve was used to verify the discrimination ofthe model. Hosmer-Lemeshow goodness-of-fit test and Calibration Plot were used to verify the calibration.Results:PPQ-C total score of 203 fathers was 17.17 ± 8.77, 81 fathers, symptoms were positive and the incidence of PTSD was 39.90%(81/203). Logistic regression analysis showed college degree ( OR = 0.297, 95% CI 0.116 - 0.763, P<0.05), very low birth weight ( OR = 2.491, 95% CI 1.027 - 6.044, P<0.05), sense of disease uncertainty ( OR = 1.038, 95% CI 1.012 - 1.066, P<0.05), negative coping style ( OR = 1.871, 95% CI 1.127 - 3.108, P<0.05) were risk factors of PTSD in fathers with premature infants. The nomogram model was established basing on the results of the Logistic regression analysis, and the ROC curve proved (AUC = 0.751) the model having a good discrimination.The Hosmer-Lemeshow goodness-of-fit test ( P = 0.974) and the calibration plot demonstrated that the prediction values tends to coincide with the actual monitoring values. Conclusions:A higher incidence of PTSD was observed in fathers with hospitalized premature infant. It was related to education level, the infants′s birth weight, disease uncertainty and coping style. Therefore, the nurses should give information support and psychological guidance according to the individual situation of the infants′ father to reduce the incidence of PTSD.

Objective:To observe the effect of irradiation on the production of IL-8 in lung cancer cell line A549 and explore its possible mechanism.Methods:A549 cells irradiated with different doses of X-rays were used to collect cell supernatant, cellular RNA and protein at different time points after irradiation. The expression level of IL-8 mRNA in A549 cells after irradiation was detected by RT-PCR, which was further validated by real-time quantitative PCR. The expression level of IL-8 in the cell supernatant was quantitatively measured by ELISA. The expression levels of cellular signaling pathway molecules in A549 cells after irradiation were detected by Western Blot. The A549 cells were pretreated with p38 MAPK inhibitor, NF-κB inhibitor and ROS scavenger. The effect of these inhibitors on the expression of IL-8 in A549 cells induced by irradiation was evaluated by ELISA.Results:Irradiation up-regulated the expression of IL-8 in A549 cells in a dose-and time-dependent manner. Irradiation activated the p38 MAPK and NF-κB signaling pathway in A549 cells. p38 MAPK and NF-κB inhibitors blocked the induction of IL-8 of A549 cells by irradiation. Inhibition of ROS failed to inhibit the induction of IL-8 of A549 cells by irradiation.Conclusion:Irradiation can increase the production of IL-8 in lung cancer cells A549, possibly through the activation of p38 MAPK and NF-κB signaling pathways in a ROS-independent pattern.

Objective To explore the clinical and technical essentials of hepatic arterial segmentation and reconstruction during split liver transplantation using pediatric deceased donor .Methods The clinical data were retrospectively analyzed for 15 pediatric deceased donor aged 4 .6-16 .3 years undergoing split liver transplantation from July 2017 to March 2019 .The donors were DBD (donation after brain death ,n=13) and DCD(donor after cardiac death ,n=2) .Thirty split liver transplantations were performed using these 15 pediatric deceased donors .The receptors were adult + child (n=5) and child + child recipients (n=10) . According to the Michels' classification ,the clinical types were I (n= 13) ,V (n= 1) and VI (n= 1) . Hepatic arterial segmentation :In type I hepatic arterial type donor liver ,proper hepatic artery was retained in right trilobar liver (n=8) ,low-age (< 7 years) donor liver (n=5) ,retaining proper hepatic artery in left liver & reconstructing right trilobe directly using right hepatic artery trunk (n= 4) .Methods of hepatic artery reconstruction :8-0 Prolene string was utilized under 4 .5 times magnifying glass for reconstructing hepatic artery in recipients aged under 4 years .Results Hepatic arterial segmentation and reconstruction were successfully completed .Hepatic arterial thrombosis occurred in 2 ./25 ecipients .The overall incidence of hepatic arterial complications was 6 .67％ .Conclusions For reducing the occurrence of arterial complications , arterial segmentation and reconstruction in pediatric deceased donor should be performed according to the size of donor liver and the characteristics of hepatic arterial classification .

Objective? To expLore the effects of diaLectic nursing-oriented hybrid teaching modeL in pediatric nursing teaching in traditionaL Chinese medicine (TCM). Methods? TotaLLy 113 nursing students from 2 cLasses (midwifery) admitted in 2015 in the SchooL of Nursing, Nanjing University of Chinese Medicine were seLected by convenient sampLing. ALL the subjects were femaLe. The 2 cLasses were divided into the observation group (n=58) or the controL group (n=55) by coin tossing. Nursing students in the controL group received traditionaL teaching, whiLe nursing students in the observation group were taught with the diaLectic nursing-oriented hybrid teaching modeL. At the end of the course, the objective structured cLinicaL examination (OSCE) was used to evaLuate their diaLectic nursing abiLity; and the SeLf-Rating ScaLe of SeLf-Directed Learning (SRSSDL) was used to evaLuate their seLf-directed Learning abiLity. ResuLts? At the end of the course, the totaL score of diaLectic nursing and scores of various dimensions of the observation group were higher than those of the controL group (P＞ 0.05). The totaL score of seLf-directed Learning abiLity and scores of Learning awareness, Learning behavior, Learning strategy and interpersonaL skiLLs of the observation group were higher than those of the controL group (P＜0.05). ConcLusions? The hybrid teaching modeL in TCM pediatric nursing teaching in universities of Chinese medicine can enhance nursing students' diaLectic nursing abiLity, heLp to cuLtivate their seLf-directed Learning abiLity and achieve the best teaching resuLts.