Objective:To investigate the incidence of visual fatigue among military pilots during flights or simulated flights and analyze the correlations among the multidimensional evaluation indicators of visual fatigue.Methods:A total of 172 pilots from an Air Force unit were selected between March 2022 and August 2023. A self-made pilot visual fatigue scale [involving the basic information, visual fatigue status scale (VFSS), and visual quality scale (VQS) was used. The visual fatigue among pilots of different types was compared. Pearson correlation analysis was used to explore the correlations between the cumulative duration of visual display terminal (VDT) and the dimensions of the VFSS, as well as between dimensions of the VFSS and the VQS. Multiple linear regression was used to identify the determinants of the score of the VQS.Results:A total of 172 questionnaires were issued, 146 of which were valid, with an effective rate of 84.88%. Among the 146 military pilots, 73 were fighter pilots and 73 were pilots of other aircraft types (20 bombers, 5 helicopters, 36 transporters, 8 trainers, and 4 fighter-bombers). There were significant differences in the scores of various dimensions and the total score of the VFSS between pilots who were different in age, aircraft types, maximum single-sortie flight durations, and in the proportion of time spent viewing cockpit displays during flight missions ( F=4.93-14.41, t=2.37-4.86, all P<0.01 or <0.05). Significant differences in visual disturbance, systemic symptoms, environmental factors, and the total visual fatigue score were observed between pilots whose total flying hours were different ( F=14.18, 4.90, 4.66, 8.12, P<0.001, =0.009,0.011, <0.001). However, there were no significant differences in the scores of any dimension or in the total score of the VFSS between pilots with a history of ocular trauma or disease and those without (all P>0.05). The cumulative duration of VDT use was positively correlated with the scores of all dimensions and the total score of the VFSS ( r=0.353, 0.303, 0.312, 0.250, 0.356, P<0.001, <0.001, <0.001, =0.002, <0.001), the dimensions of which were positively correlated with those of the VQS ( r=0.448-0.781, all P<0.01). Age ( B=1.524, 95% CI: 0.503-2.545), proportions of time spent viewing cockpit displays during flight missions ( B=3.721, 95% CI: 1.683-5.759), starburst ( B=2.346, 95% CI: 0.516-4.176), blurred vision ( B=3.517, 95% CI: 1.168-5.866), visual fluctuation ( B=2.997, 95% CI: 1.036-4.957) and halo ( B=2.415, 95% CI: 0.469-4.362) were contributors to the total visual fatigue score. Conclusions:The scores of various dimensions and the total score of visual fatigue status in military pilots can increase with age, peak in the group ages 40 to 49, and then decline. Fighter pilots experience lower levels of visual fatigue than those of other aircraft types. The visual quality scale can serve as a reference for assessing pilots′ visual fatigue status. Cumulative durations of VDT use are positively correlated with the degree of visual fatigue. Age, proportions of time spent viewing cockpit displays during flight missions, starburst, blurred vision, visual fluctuation and halo can be used to quickly assess the risk level of visual fatigue among pilots.

Objective:To explore the association between spicy food intake and the risk for cardio/cerebrovascular diseases.Methods:Data were collected from the China Kadoorie Biobank project conducted in Pengzhou, Sichuan Province. Using the Cox proportional hazards regression model, we analyzed the associations of the frequency of spicy food intake, spicy level, types of spicy food, and the age when regular intake of spicy food began (intake in 1 day/week), with the risk for cardio/cerebrovascular disease. Furthermore, the associations with the risks for ischemic heart disease (IHD) and cerebrovascular diseases, as well as the risk of ischemic stroke (IS) and hemorrhagic stroke (HS) were analyzed.Results:A total of 54 859 study participants were included in the study, in whom 49 320 had spicy food intake (89.90%). In these participants, 37 680 (68.69%) had spicy food intake in 6-7 days/week, 5 036 (9.18%) had spicy food intake in 1-5 days/week, and 6 604 (12.03%) had spicy food intake once a week; 5 539 (10.10%) had never/almost never had spicy food intake. After adjusting for multiple confounding factors, compared with those who never/almost never had spicy food intake, intake of spicy food was associated with reduced risks for IHD (intake in 6-7 days/week: HR=0.86, 95% CI: 0.78-0.95), cerebrovascular diseases (intake in 6-7 days/week: HR=0.88, 95% CI: 0.81-0.96), and IS (intak in 6-7 days/week: HR=0.85, 95% CI: 0.76-0.95). With the increase of spicy food intake frequency, the risk for cardio/cerebrovascular disease decreased (intake in 1-5 days/week: HR=0.91, 95% CI: 0.85-0.98; intake in 6-7 days/week: HR=0.89, 95% CI: 0.84-0.94) (trend test P<0.001). However, no statistical association was found between spicy food intake and the risk for HS. In terms of spicy level, after adjusting for multiple confounding factors, compared with those who never/almost never had spicy food intake, intake of spicy food was associated with reduced risk for cardio/cerebrovascular disease (moderate: HR=0.86, 95% CI: 0.82-0.90) and cerebrovascular disease (moderate: HR=0.90, 95% CI: 0.84-0.97). With the increase of spicy level, the risk for IHD decreased (moderate: HR=0.86, 95% CI: 0.79-0.93; strong: HR=0.84, 95% CI: 0.74-0.95) (trend test P<0.001). After adjusting for multiple confounding factors, compared with those who never/almost never had spicy food intake, intake of any type of spicy food was associated with reduced risk for cardio/cerebrovascular disease, IHD, and cerebrovascular disease. Regulat intake of spicy food from age 0-10 years was associated with reduced risk for cardio/cerebrovascular disease, IHD, and cerebrovascular disease. Regular intake of spicy food from age 11-20 years reduced the risk for cardio/cerebrovascular disease and IHD. There was no significant association between the regular intake of spicy food from age 21-79 years and the risks for cardio/cerebrovascular disease, IHD and cerebrovascular disease. Conclusion:The intake of spicy food could reduced the risk for cardio/cerebrovascular diseases, IHD, cerebrovascular diseases and IS in residents aged 30-79 years in Sichuan.

Objective:To explore the association between spicy food intake and the risk for cardio/cerebrovascular diseases.Methods:Data were collected from the China Kadoorie Biobank project conducted in Pengzhou, Sichuan Province. Using the Cox proportional hazards regression model, we analyzed the associations of the frequency of spicy food intake, spicy level, types of spicy food, and the age when regular intake of spicy food began (intake in 1 day/week), with the risk for cardio/cerebrovascular disease. Furthermore, the associations with the risks for ischemic heart disease (IHD) and cerebrovascular diseases, as well as the risk of ischemic stroke (IS) and hemorrhagic stroke (HS) were analyzed.Results:A total of 54 859 study participants were included in the study, in whom 49 320 had spicy food intake (89.90%). In these participants, 37 680 (68.69%) had spicy food intake in 6-7 days/week, 5 036 (9.18%) had spicy food intake in 1-5 days/week, and 6 604 (12.03%) had spicy food intake once a week; 5 539 (10.10%) had never/almost never had spicy food intake. After adjusting for multiple confounding factors, compared with those who never/almost never had spicy food intake, intake of spicy food was associated with reduced risks for IHD (intake in 6-7 days/week: HR=0.86, 95% CI: 0.78-0.95), cerebrovascular diseases (intake in 6-7 days/week: HR=0.88, 95% CI: 0.81-0.96), and IS (intak in 6-7 days/week: HR=0.85, 95% CI: 0.76-0.95). With the increase of spicy food intake frequency, the risk for cardio/cerebrovascular disease decreased (intake in 1-5 days/week: HR=0.91, 95% CI: 0.85-0.98; intake in 6-7 days/week: HR=0.89, 95% CI: 0.84-0.94) (trend test P<0.001). However, no statistical association was found between spicy food intake and the risk for HS. In terms of spicy level, after adjusting for multiple confounding factors, compared with those who never/almost never had spicy food intake, intake of spicy food was associated with reduced risk for cardio/cerebrovascular disease (moderate: HR=0.86, 95% CI: 0.82-0.90) and cerebrovascular disease (moderate: HR=0.90, 95% CI: 0.84-0.97). With the increase of spicy level, the risk for IHD decreased (moderate: HR=0.86, 95% CI: 0.79-0.93; strong: HR=0.84, 95% CI: 0.74-0.95) (trend test P<0.001). After adjusting for multiple confounding factors, compared with those who never/almost never had spicy food intake, intake of any type of spicy food was associated with reduced risk for cardio/cerebrovascular disease, IHD, and cerebrovascular disease. Regulat intake of spicy food from age 0-10 years was associated with reduced risk for cardio/cerebrovascular disease, IHD, and cerebrovascular disease. Regular intake of spicy food from age 11-20 years reduced the risk for cardio/cerebrovascular disease and IHD. There was no significant association between the regular intake of spicy food from age 21-79 years and the risks for cardio/cerebrovascular disease, IHD and cerebrovascular disease. Conclusion:The intake of spicy food could reduced the risk for cardio/cerebrovascular diseases, IHD, cerebrovascular diseases and IS in residents aged 30-79 years in Sichuan.

Objective:To investigate the incidence of visual fatigue among military pilots during flights or simulated flights and analyze the correlations among the multidimensional evaluation indicators of visual fatigue.Methods:A total of 172 pilots from an Air Force unit were selected between March 2022 and August 2023. A self-made pilot visual fatigue scale [involving the basic information, visual fatigue status scale (VFSS), and visual quality scale (VQS) was used. The visual fatigue among pilots of different types was compared. Pearson correlation analysis was used to explore the correlations between the cumulative duration of visual display terminal (VDT) and the dimensions of the VFSS, as well as between dimensions of the VFSS and the VQS. Multiple linear regression was used to identify the determinants of the score of the VQS.Results:A total of 172 questionnaires were issued, 146 of which were valid, with an effective rate of 84.88%. Among the 146 military pilots, 73 were fighter pilots and 73 were pilots of other aircraft types (20 bombers, 5 helicopters, 36 transporters, 8 trainers, and 4 fighter-bombers). There were significant differences in the scores of various dimensions and the total score of the VFSS between pilots who were different in age, aircraft types, maximum single-sortie flight durations, and in the proportion of time spent viewing cockpit displays during flight missions ( F=4.93-14.41, t=2.37-4.86, all P<0.01 or <0.05). Significant differences in visual disturbance, systemic symptoms, environmental factors, and the total visual fatigue score were observed between pilots whose total flying hours were different ( F=14.18, 4.90, 4.66, 8.12, P<0.001, =0.009,0.011, <0.001). However, there were no significant differences in the scores of any dimension or in the total score of the VFSS between pilots with a history of ocular trauma or disease and those without (all P>0.05). The cumulative duration of VDT use was positively correlated with the scores of all dimensions and the total score of the VFSS ( r=0.353, 0.303, 0.312, 0.250, 0.356, P<0.001, <0.001, <0.001, =0.002, <0.001), the dimensions of which were positively correlated with those of the VQS ( r=0.448-0.781, all P<0.01). Age ( B=1.524, 95% CI: 0.503-2.545), proportions of time spent viewing cockpit displays during flight missions ( B=3.721, 95% CI: 1.683-5.759), starburst ( B=2.346, 95% CI: 0.516-4.176), blurred vision ( B=3.517, 95% CI: 1.168-5.866), visual fluctuation ( B=2.997, 95% CI: 1.036-4.957) and halo ( B=2.415, 95% CI: 0.469-4.362) were contributors to the total visual fatigue score. Conclusions:The scores of various dimensions and the total score of visual fatigue status in military pilots can increase with age, peak in the group ages 40 to 49, and then decline. Fighter pilots experience lower levels of visual fatigue than those of other aircraft types. The visual quality scale can serve as a reference for assessing pilots′ visual fatigue status. Cumulative durations of VDT use are positively correlated with the degree of visual fatigue. Age, proportions of time spent viewing cockpit displays during flight missions, starburst, blurred vision, visual fluctuation and halo can be used to quickly assess the risk level of visual fatigue among pilots.

Lead is one of the most important occupational hazards in China, and occupational exposure is the leading cause of lead poisoning. Lead can be absorbed by the body through air, food, drinking water and skin, and accumulate in multiple organs in the body, posing health risks to humans, especially to lead workers. Many previous studies have shown that lead can affect the function of glial cells such as microglia, astrocytes and oligodendrocytes, resulting in irreversible neurological damage. This article provides an overview of the neurotoxic mechanism induced by lead through glial cells, elucidates that lead can induce neurodegenerative diseases such as Alzheimer′s disease, Parkinson′s disease, and amyotrophic lateral sclerosis, and reviews the relationship between lead and glial cells, in order to provide reference for further research on the neurotoxic mechanism of lead on glial cells.

Lead is one of the most important occupational hazards in China, and occupational exposure is the leading cause of lead poisoning. Lead can be absorbed by the body through air, food, drinking water and skin, and accumulate in multiple organs in the body, posing health risks to humans, especially to lead workers. Many previous studies have shown that lead can affect the function of glial cells such as microglia, astrocytes and oligodendrocytes, resulting in irreversible neurological damage. This article provides an overview of the neurotoxic mechanism induced by lead through glial cells, elucidates that lead can induce neurodegenerative diseases such as Alzheimer′s disease, Parkinson′s disease, and amyotrophic lateral sclerosis, and reviews the relationship between lead and glial cells, in order to provide reference for further research on the neurotoxic mechanism of lead on glial cells.

Objective:To explore the clinical efficacy of simultaneous or staged video-assisted thoracoscopic surgery (VATS) anatomic segmentectomy for bilateral double primary lung cancer (DPLC).Methods:A retrospective cohort study was conducted. The clinical data of 76 patients with bilateral DPLC who underwent VATS anatomic segmentectomy in Luzhou Traditional Chinese Medicine Hospital from February 2020 to August 2022 were retrospectively analyzed, and they were classified into the simultaneous bilateral thoracoscopic surgery group (the simultaneous group, 44 cases) and the staged thoracoscopic surgery group (the staged group, 32 cases) on the basis of the surgical methods. The intraoperative conditions, perioperative indexes and postoperative complications of the two groups were compared.Results:There were no statistically significant differences in the gender, age, pathological type,postoperative TNM staging of both groups (all P > 0.05). The anesthesia awakening time of the first and second stages of surgery in the staged group was (11±3) min and (13±4) min, which was shorter than that in the simultaneous group [(16±4) min] ( t values were 5.27 and 3.51, both P < 0.05). The number of drainage tubes placed in the simultaneous group was less than that in the sum of two stages of the staged group [(1.9±0.5) tubes vs. (2.2±0.5) tubes, t = 3.40, P = 0.001]. The duration of thoracic drainage tube retention, the postoperative total drainage flow, the days of hospitalization, the first postoperative landing time, and the total treatment cost in the first and second stages of surgery in the staged group were lower than those in the simultaneous group (all P < 0.05), while the postoperative total drainage flow, the days of hospitalization, and the total treatment cost in the sum of two stages of the staged group were higher than those in the simultaneous group (all P < 0.05). The total incidence of complications in the simultaneous group was higher than that in the staged group 1 month after surgery [18.18% (8/44) vs. 3.13% (1/32)], and the difference was statistically significant ( χ2 = 4.02, P = 0.045). The scores of activities of daily living, arterial partial pressure of oxygen, arterial partial pressure of carbon dioxide, and blood oxygen saturation in the simultaneous group were lower than those in the staged group (all P < 0.05). Conclusions:Staged VATS anatomic segmentectomy for bilateral DPLC has few complications and good ability to perform activities of daily living, whereas the treatment cost of simultaneous bilateral thoracoscopic surgery is low. Clinicians may recommend prioritizing simultaneous bilateral thoracoscopic surgery after comprehensively considering the patients ' physical and economic conditions.

Osteoarthritis (OA) is a chronic degenerative joint disease whose main characteristic is the destruction of articular cartilage, causing pain and disability in patients and seriously affecting their quality of life. OA can be induced by a variety of causes, and pathological changes in articular cartilage are considered to be one of the key driving factors for the occurrence of OA. High mobility group box-1 protein (HMGB1), as a non-histone protein in eukaryotic cells, can participate in regulating the inflammation and apoptosis process of OA chondrocytes, thus leading to the occurrence of OA. This article reviews the research on the mechanism of HMGB1 in OA chondrocytes, with a view to providing new ideas for the clinical prevention and treatment of OA.

【Objective】 To investigate the effect of isoliquiritigenin on inflammatory response of vascular endothelial cells and whether the regulatory effect of isoliquiritigenin on inflammation is mediated by histone deacetylase 3 (HDAC3). 【Methods】 Human umbilical vein endothelial cells (HUVECs) were cultured in vitro and treated with LPS, different concentrations of isoliquiritigenin and HDAC3 specific inhibitor, respectively. Real-time PCR and Western blotting were used to detect the mRNA and protein expressions of inflammatory cytokines and HDAC3. Male C57BL/6J mice were randomly divided into vehicle group and isoliquiritigenin treatment group. The vascular inflammation model of C57BL/6J mice was established by ligation of the left carotid arteries. The mRNA expressions of inflammatory cytokines and HDAC3 in the carotid arteries of mice were detected by Real-time PCR. A molecular docking study was performed to investigate the interaction between isoliquiritigenin and HDAC3. 【Results】 Compared with the vehicle group, isoliquiritigenin reduced the mRNA expressions of inflammatory cytokines NLRP3, IL-1β, IL-18, MCP-1 and ICAM-1 and decreased the expression of HDAC3 mRNA and protein in HUVECs stimulated with LPS. In addition, isoliquiritigenin also decreased the mRNA expressions of NLRP3, IL-1β and HDAC3 in carotid arteries of ligated C57BL/6J mice. The docking of isoliquiritigenin in the active site of HDAC3 showed that isoliquiritigenin might act through HDAC3. Furthermore, HDAC3 specific inhibitor RGFP966 further promoted the inhibitory effect of isoliquiritigenin on the expression of inflammatory cytokines in vascular endothelial cells. 【Conclusion】 These results suggest that isoliquiritigenin suppresses the inflammatory response of vascular endothelial cells via HDAC3.

BACKGROUND: Wuhuang oil has a bacteriostatic action to treat burn wound and promote traumatic healing, but the action on inhibition of scars formation remains poorly understood.OBJECTIVE: To investigate the effects of modified Wuhuang oil at different concentrations and administration times on the growth and proliferation of human fibroblasts in vitro.DESIGN, TIME AND SETTING: Comparison observation regarding cytology in vitro was performed at the Burns Institute in the First Affiliated Hospital of Nanchang University between April 2006 and January 2007.MATERIALS: Prepuce specimens were harvested from patients who underwent circumcision in Department of urinary surgery, at First Affiliated Hospital of Nanchang University and Jiangxi Provincial Children Hospital. All patients aged 2-12 years old, and informed consents were obtained from their relatives. Wuhuang oil and modified Wuhuang oil (water-solubility) were offered by Department of Pharmaceutical Preparation in the First Affiliated Hospital of Nanchang University, China. METHODS: Human fibroblasts cultured in vitro were divided into 2 groups at random, experiment and control. Experiment group was treated with 300 g/L Wuhuang oil, while control group with 300 g/L modified Wuhuang oil. Serum-free culture fluid was used to prepare 6 concentrations of oil solution: 0 (blank control), 100, 150, 200, 250, 300 g/L.MAIN OUTCOME MEASURES: MTT assay was used to determine the growth and proliferation of human fibroblasts at 2, 3, 4, 5,6 days; inhibition rate of cell growth was observed at 2, 4, 6, 8, 10 days.RESULTS: Modified Wuhuang oil (0-300 g/L) concentration positively correlated with inhibition of human fibroblast proliferation;the inhibition was not related to culture time. Modified Wuhuang oil (300 g/L) had the greatest inhibition rate of human fibroblasts at 8-10 days, there were significant differences between experiment group and control group (P < 0.01).CONCLUSION: Modified Wuhuang oil has an effective inhibition on the proliferation of human fibroblasts in vitro, and shows a dose-dependent tendency. Compared with Wuhuang oil, 300 g/L modified Wuhuang oil is superior to suppress the growth of human fibroblasts.