Objective To explore the protective effect in a model of nicotinamide riboside(NR)against carbonyl cyanide m-chlorophenylhydrazone(CCCP)-induced oxidative stress in R28 cells.Methods 4 μmol/L CCCP was used to induce oxidative stress in R28 cells,and 400 nmol/L NR was used to intervene.The cell viability was quantified by CCK-8 assay.The apoptosis was detected by Annexin-V/PI double staining and flow cytometry.Western blotting was used to examine the levels of Cytochrome C,Caspase-3,and Caspase-9 to evaluate the apoptosis.Tetramethylrhodamine ethyl ester was used to detect the mitochondrial membrane potential(MMP),MitoSOX was used to detect the mitochondrial reactive oxygen species(mtROS)levels,and adenosine triphosphate(ATP)assay kit was used to assess ATP generation ability to evaluate mitochondrial function.Results After CCCP treatment of R28 cells,the cell viability decreased,the apoptotic protein levels and apoptosis rates increased,the MMP decreased,and the mtROS generation increased(P＜0.05).After NR pretreatment,the cell viability increased,the apoptotic protein levels and apoptosis rates decreased,the MMP increased,and the mtROS generation decreased(P＜0.05).Conclusion:NR enhances the cell viability,reduces the expression of apoptotic proteins,and ultimately reduces the apoptosis of retinal ganglion cell by inhibiting oxidative stress response and protecting mitochondrial function.

ObjectiveTo explore the relationships between internet gaming disorder (IGD), interpersonal needs, loneliness, and depression in adolescents through the construction of a chain mediation model, to clarify the underlying mechanisms of these associations, and to provid a theoretical basis for depression prevention and intervention. MethodsBased on the data of the 7th Population Census, using convenient sampling method 1 106 adolescents aged between 10‒19 years in South China (176), North China (147), Central China (332), and East China (451) were selected to conduct a cross-sectional survey, with a ratio of 1∶1∶1.5∶2.5. The survey was conducted with a questionnaire consisting of general information (sex, age, grade, parents’ education level), the Chinese version of the IGDS9-SF, the INQ-15, the short-form of the ULS-8 and the PHQ-9 were used to evaluate the depression status of adolescents. Spearman correlation analysis was used to explore the correlation between the variables. A multiple-mediator model was constructed using IBM SPSS Statistics 22.0 PROCESS to examine the mediating effects of interpersonal needs and loneliness on the relationship between IGD and depression. The significance of the chain mediating effect was tested using the Bootstrap method. ResultsOverall, 39.06% (432/1 106) adolescents experienced depression. The incidence of depression among adolescents with smoking and without smoking was 62.50% and 38.36%, respectively. Similarly, the incidence of depression among adolescents with alcohol consuming and without alcohol consuming was 61.94% and 35.94%, respectively. There were statistically significant differences between IGD, interpersonal needs, loneliness, and depression (P<0.01). The chain mediation model demonstrated a good fit, and the bootstrap test showed that the 95%CI of each mediation path did not include 0, indicating significant mediation effects. The overall effect was 0.337. The direct effect of IGD on depression was significant (effect value=0.138, 95%CI:0.102-0.173, P<0.001). The mediation effects included three paths: ① IGD →interpersonal needs → depression (effect value=0.073, P<0.05), accounting for 21.47% of the total effect;② IGD→ loneliness → depression (effect value=0.093, P<0.05), accounting for 27.35%; and ③ IGD → interpersonal needs → loneliness → depression (effect value=0.036, P<0.05), accounting for 10.59%. ConclusionInterpersonal needs and loneliness independently and jointly mediate the relationship between IGD and depression among adolescents. To reduce depression and improve mental health in this population, measures should be taken to prevent and intervene in IGD, address adolescents’ social and emotional needs, enhance satisfaction of interpersonal needs, and reduce loneliness.

Liver diseases constitute a major healthcare burden globally, including acute hepatic injury resulted from acetaminophen overdose, ischemia-reperfusion or hepatotropic viral infection and chronic hepatitis, alcoholic liver disease (ALD), non-alcoholic fatty liver disease (NAFLD) and hepatocellular carcinoma (HCC). Attainable treatment strategies for most liver diseases remain inadequate, highlighting the importance of substantial pathogenesis. The transient receptor potential (TRP) channels represent a versatile signalling mechanism regulating fundamental physiological processes in the liver. It is not surprising that liver diseases become a newly explored field to enrich our knowledge of TRP channels. Here, we discuss recent findings revealing TRP functions across the fundamental pathological course from early hepatocellular injury caused by various insults, to inflammation, subsequent fibrosis and hepatoma. We also explore expression levels of TRPs in liver tissues of ALD, NAFLD and HCC patients from Gene Expression Omnibus (GEO) or The Cancer Genome Atlas (TCGA) database and survival analysis estimated by Kaplan-Meier Plotter. At last, we address the therapeutical potential and challenges by pharmacologically targeting TRPs to treat liver diseases. The aim is to provide a better understanding of the implications of TRP channels in liver diseases, contributing to the discovery of novel therapeutic targets and efficient drugs.

Objective: To explore the relationship between mobile phone dependence (MPD) and academic burden among junior middle school students in Guizhou Province, under the "double reduction" policy by using a multi level model, so as to provide a basis for preventing the occurrence of MPD. Methods: From December 2021 to January 2022, 7 868 students from grade 1 to grade 3 in 3 cities (prefecture) of Guizhou Province were selected by multi stage stratification random sampling method, and on site investigation was conducted by self compiled questionnaire and Self rating Questionnaire for Adolescent Problematic Mobile Phone Use(SQAPMPU). Using MLwiN 2.30 to fit a multi level model of the relationship between MPD and academic burden among junior middle school students. Results: The MPD detection rate of junior middle school students in Guizhou Province was 20.9%. The multi level model revealed that MPD of junior middle school students was clustered at the level of school and class ( χ 2= 1 565.32 , P <0.01), and high perceived academic pressure had a positive predictive effect on MPD among junior middle school students ( β =1.96). Homework duration ≥90 min/d at weekends had a negative predictive effect on MPD ( β =-0.55), while participation in off campus training on learning days had a positive predictive effect ( β =1.66)( P <0.05). Conclusion The MPD occurrence level is higher among junior middle school students in Guizhou Province. Perceived academic pressure, time spent on homework during weekends, off campus training and other academic burdens have an impact on MPD among junior middle school students, which should be a cause of concern for schools, families and social departments.

Objective:To explore the pain points of outpatient service in hospital from the patient′s perspective, and to provide new ideas for optimizing management of service quality.Methods:Ten top hospitals in China were selected to collect the poor evaluation texts of outpatient services published by patients on the Dianping.com from January 1, 2017 to December 31, 2019. The user′ pain-point analysis model was introduced, the pain-point index word collection was constructed according to the word frequency, the pain-point index was quantitatively analyzed combined with the sentimental value, and the content of the index words was analyzed through conceptual annotation.Results:The analysis of 1 259 poor evaluation texts showed that patients′ poor evaluation of outpatient service quality mainly focused on four aspects: interpersonal interaction, process factors, human-computer interaction and environmental factors. The poor attitude of medical staff in interpersonal interaction and the long queuing time and short treatment time in process factors were the most prominent.Conclusions:Online patient comment analysis is suitable for the identification and perception of pain points in outpatient service, and is helpful for the hospital to choose the direction and items of service improvement.

Objective:To figure out variety of the plasma level of Alpha-1-Antitrypsin(α1-AT) in patients who undergo AKI following cardiopulmonary bypass(CPB), and whether this biomarker serve as a competent predictor.Methods:We recruited 75 patients undergoing cardiac surgery with CPB from January 2018 to January 2019. Patients were categorized into two groups according to the development of AKI. The relationship between plasma concentration of α1-AT and renal injury in two groups was analyzed.Results:27 patients in the AKI group were aged (54.3±12.2)years old, including 15 males and 12 females, the time of cardiopulmonary bypass was(133.5±34.7)min. In the non-AKI group, 48 cases were aged(47.7±11.3)years old, including 26 males and 22 females, and the time of cardiopulmonary bypass was(133.5±34.7)min. α1-AT was significantly decreased in AKI group at 1 h after operation[(0.53±0.53)g/L vs. (1.46±0.91)g/L, P<0.05]compared with the non-AKI group. The sensitivity and specificity of α1-antitrypsin level at 1h after operation was the highest when α1-AT was 0.675 g/L. CPB time ( OR=5.890, 95% CI: 1.078-32.173) and age ( OR=4.427, 95% CI: 1.113-17.614) were independent risk factors for AKI after surgery, and α1-AT at 1h after CPB ( OR=0.084, 95% CI: 0.021-0.333) were protective factors after operation. Conclusion:Increased concentration of α1-AT after cardiopulmonary bypass at early time is a protective factor for AKI and the concentration of α1-AT in plasma could be used as an early biomarker of AKI after CPB.

Objective: To compare the abdominal fat distribution in patients with primary aldosteronism (PA) and essential hypertension (EH), and to analyze the correlation between abdominal fat area and indexes such as glycolipid metabolism and insulin resistance. Methods: Forty-five PA and 55 EH patients were collected from inpatients in the First Affiliated Hospital of Zhengzhou University for suspicious secondary hypertension, from September 2016 to February 2019. All patients received quantitative computed tomography to measure the total abdominal fat area (TFA), visceral fat area (VFA), and subcutaneous fat area (SFA) when receiving adrenal CT detection. Visceral obesity was defined as VFA≥130 cm². The percentage of visceral fat area in total abdominal fat area (V%=VFA/TFA), the ratio of visceral fat area to subcutaneous fat area (V/S=VFA/SFA) and the percentage of visceral obesity were calculated. Results: TFA and VFA in EH group were higher than those in PA group matched by age, gender, and body mass index (BMI, all P<0.01), and there were no statistically significant differences in SFA, V%, V/S, and the percentage of visceral obesity between the two groups. In PA group, TFA and VFA were positively correlated with homeostasis model assessment of insulin resistance index (P<0.01), TFA was positively correlated with triglycerides (TG) and low density lipoprotein-cholesterol, while SFA was positively correlated with TG (all P<0.05). Conclusion Compared with EH patients matched by age, gender, and BMI, TFA and VFA in PA patients are lower. Abdominal fat area is associated with insulin resistance and blood lipids in PA patients, while VFA exerts a greater effect on insulin resistance than that of TFA and SFA.

Objective To evaluate a new biodegradable inferior vena cava(IVC) filter by in vitro and in vivo experiments.Methods The biodegradable filter consisted of metal stent and absorbable suture,which acts as a degradable deformable switch of the filter.When the suture of the proximal metal filter degrades and lost its tension,the metal filter will change into a stent.In vitro experiments were performed to test the influence of the sterilization method and the tension of absorbable sutures to the filter's selfconvertible time,animal experiments were conducted to evaluate the effectiveness of emboli capture and to observe the in vivo self-convertible time of the filter.IVC stenosis,pulmonary embolus and intimal hyperplasia and inflammation were evaluated.Results Ethylene oxide sterilization did not have an adverse effect on the self-convertible time of the filters.The tension did not affect the degradation rates of the suture significantly.In animal experiments,the VCFs were successfully implanted via femoral vein approach.Not any tilt,migration or structural damage of the filters was found during the follow-up time.Postoperative fluoroscopy and autopsy confirmed that there was no stenosis or thrombosis,IVC perforation.After implantation large thrombi were captured.The sutures degraded and filters transformed into stents in 3 weeks.After 90 days IVC was patent with mild intimal hyperplasia and no thrombosis.Conclusions This study demonstrated the effectiveness and safety of the biodegradable filter we designed.

Objective To investigate the morphological differences of proximal femoral medullary cavity in elderly patients with intertrochanteric fracture and its effect on the treatment efficacy of proximal femoral nail antirotation (PFNA). Methods A retrospective case series study was conducted on the clinical data of 112 elderly patients with intertrochanteric fracture of the femur from December 2012 to January 2017, including the preoperative and postoperative hip joints orthotopic X ray (including the proximal femur), lateral X ray, and pelvic orthotopic X ray films. The proximal femoral canal flare index (CFI) and the metaphyseal canal flare index (MCFI) were measured. The proportion of patients with different types of medullary cavity and the gender difference were analyzed according to Dorr typing. The fractures were classified according to the modified Evans classification. Operation time, fracture reduction quality, tip apex distance (TAD), incidence of intraoperative split fracture around the rotors, postoperative fracture reduction loss rate, weight bearing time, and fracture healing time were recorded. Results The proximal femoral canal flare index (CFI) was significantly correlated with the intramedullary diameter above the lesser trochanter, the inner diameter of the affected side medullary cavity isthmus, and metaphyseal canal flare index (MCFI) (P ＜0.01). There was clear difference in gender in terms of the medullary cavity diameter 20 mm above the middle point of lesser trochanter, medullary isthmus internal diameter, the medullary cavity diameter 20 mm below the middle point of lesser trochanter, CFI, and MCFI. Thereinto, there was significant difference in the medullary cavity diameter 20 mm above the middle point of lesser trochanter [male (52.6 ± 6.4) mm, female: (49.9 ± 5.4) mm], the medullary cavity diameter 20 mm below the middle point of lesser trochanter [male: (26.5 ± 3.7) mm, female: (23.1 ±2.8)mm], and MCFI (male:2.0 ±0.3, female:2.2 ±0.2). No significant difference between the medullary isthmus internal diameter and CFI was found (P＞0.05). In this group, the medullary cavity of proximal femur was classified by Dorr: the proportion of funnel type, normal type, and chimney type was 5.4％ (6/112), 73.2％ (82/112), and 21.4％ (24/112), respectively. There was no significant difference in the modified Evans fracture stability among different morphological types of the proximal femoral medullary cavity. The difference of weight bearing time between normal group and chimney group was statistically significant [normal type: (21.4±16.9)d, chimney type: (45.5 ± 11.2)d] (P ＜ 0.05), but there were no significant differences in operation time, reduction quality, TAD, intraoperative incidence of cleavage fracture incidence, reduction loss rate, and healing time between the two groups (P＞0.05). Conclusions The occurrence and development of osteoporosis can cause significant changes in the morphology of proximal femoral medullary cavity, mainly manifesting as the gradual increase of the proportion of chimney type. The efficacy of PFNA in treatment of the intertrochanteric fracture is satisfactory. However, the risk of intraoperative cleavage fracture and postoperative reduction loss should be taken seriously.

Objective To study the mechanism of RING finger protein 34 ( RNF34 ) involved in innate immunity . Methods Recombinant PCR was used and transient expression of the plasmid was achieved in HEK 293T cells.The cells were stimulated with Sendai virus ( SeV) or N-RIG-Ⅰfor the indicated time while luciferase activity was observed using the dual-luciferase reporter assay kit .Results We constructed the plasmid pcDNA 3-Flag-RNF34 and its three mutations .The study found that when stimulated by SeV , RNF34 could inhibit the activity of NF-κB and IFN-βmore significantly than RNF34-ΔFYVE, RNF34-ΔCID and RNF34-ΔRING.We also found that RNF 34 and its three mutants had similar inhibitory effect when the activation of NF-κB and IFN-βwas stimulated by the N-RIG-Ⅰ.Conclusion RNF34 negatively regulates innate immunity by acting on the RIG-Ⅰ-MAVS signaling pathway .