Objective:To explore the correlation between ferroptosis-related proteins SLC7A11, GPX4, ACSL4 and the radiosensitivity and prognosis of nasopharyngeal carcinoma. And to investigate the potential of these proteins as molecular markers for predicting the radiosensitivity of nasopharyngeal carcinoma. Methods: A retrospective analysis was conducted on 52 cases of nasopharyngeal carcinoma （nasopharyngeal carcinoma group） and 20 cases of chronic nasopharyngiti s（control group）. The relevant clinical data were reviewed, and paraffin-embedded tissue blocks were collected for study. The expressions of SLC7A11, GPX4, and ACSL4 in pathological specimens were detected by immunohistochemical staining. The expression differences of ferroptosis-related proteins between the nasopharyngeal carcinoma group and the control group were analyzed. The nasopharyngeal carcinoma group was further divided based on the protein expression levels into high and low expression subgroups for SLC7A11, GPX4, and ACSL4. Subsequently, a differential analysis of clinical data and survival analysis was conducted for each of these subgroups. Finally, logistic regression analysis was performed to identify the factors influencing radiotherapy resistance in nasopharyngeal carcinoma. Results:①The differential analysis revealed that, compared to the control group, the nasopharyngeal carcinoma group exhibited significantly higher expression of SLC7A11 and GPX4, and lower expression of ACSL4 （P<0.05）. ②Notably, the proportion of patients displaying radioresistance was higher in the SLC7A11 and GPX4 high expression groups compared to their respective low expression groups （P<0.05）. However, the proportion of radioresistance in the ACSL4 high expression group was lower than that in the ACSL4 low expression group （P<0.05）. Survival analysis indicated that the 5-year overall survival rate was lower in the SLC7A11 and GPX4 high expression groups compared to their respective low expression groups（P<0.05）. However, the 5-year overall survival rate of the ACSL4 high expression group was higher than that of the ACSL4 low expression group（P<0.05）. ③logistic regression analysis showed that SLC7A11 and GPX4 was an independent risk factor for radioresistance in patients with nasopharyngeal carcinoma（P<0.05）. Conclusion:Nasopharyngeal carcinoma tissues over-express SLC7A11, GPX4, and under-express ACSL4. Over-expression of SLC7A11 and GPX4 are independent risk factors for radioresistance in patients with nasopharyngeal carcinoma. The inhibition of ferroptosis may be related to the occurrence, progression and radioresistance of nasopharyngeal carcinoma. Detection of the expression of SLC7A11, GPX4, and ACSL4 has guiding significance for the evaluation of radiosensitivity and prognosis of patients with nasopharyngeal carcinoma.
Humans ; Nasopharyngeal Carcinoma/radiotherapy* ; Nasopharyngeal Neoplasms/pathology* ; Coenzyme A Ligases/metabolism* ; Radiation Tolerance ; Phospholipid Hydroperoxide Glutathione Peroxidase ; Amino Acid Transport System y+/metabolism* ; Prognosis ; Long-Chain-Fatty-Acid-CoA Ligase ; Retrospective Studies ; Ferroptosis ; Male ; Female ; Middle Aged

Objective To investigate the relationship between serum periostin (POSTN) level and bone mineral density in patients undergoing maintenance hemodialysis (MHD). Methods Ninety-five patients who had received MHD treatment for more than 3 months in the Hemodialysis Center of Qingdao Municipal Hospital from October 2022 to October 2023 were enrolled as experimental group. Meanwhile, 50 healthy individuals undergoing health examinations in the Physical Examination Center of the same hospital during the same period were selected as the control group. Clinical data such as gender and age were collected for both groups. Fasting venous blood samples were collected before dialysis to measure parathyroid hormone (PTH), alkaline phosphatase (ALP), urea nitrogen, serum creatinine, serum calcium, serum phosphorus, and other indicators. Serum POSTN levels in MHD patients and healthy individuals were determined using enzyme-linked immunosorbent assay (ELISA). The correlation between serum POSTN levels and bone mineral density in MHD patients was explored. Univariate and multivariate binary Logistic regression analyses were performed to identify risk factors for low bone mineral density in MHD patients and assess the clinical value of serum POSTN level in predicting low bone mineral density in these patients. Results The serum POSTN level in the experimental group were significantly higher than those in the control group (P < 0.05). These patients were divided into two groups based on T-values: normal bone mass group(47 cases, T value >-1.0) and low bone mineral density (48 cases, T value≤-1.0). The low bone mineral density group had significantly higher serum POSTN levels, dialysis vintage, PTH, ALP, serum phosphorus, β₂-microglobulin levels, and a higher proportion of females compared to the normal bone mass group (P < 0.05). Pearson correlation analysis revealed negative correlations of bone mineral density T values with serum POSTN, dialysis vintage, C-reactive protein, PTH, ALP, serum phosphorus, and β₂-microglobulin in MHD patients (r=-0.695, -0.688, -0.246, -0.528, -0.216, -0.309, -0.293; P < 0.05). Multivariate binary Logistic regression analysis showed that after adjusting for confounding factors such as dialysis vintage, PTH, and ALP, high serum POSTN level was an independent risk factor for low bone mineral density in MHD patients. The receiver operating characteristic (ROC) curve indicated that the area under the curve (AUC) for serum POSTN level in predicting low bone mineral density in MHD patients was 0.901, with a cut-off value of 29.66 ng/L. Conclusion MHD patients have higher serum POSTN levels than healthy individuals, and this marker is associated with low bone mineral density in MHD patients.

Objective:To provide basis for personalized health interventions for military pilots by analyzing the longitudinal variation trend of waist circumference and its correlation with BMI and lipid metabolism indicators among military pilots.Methods:A retrospective analysis was used on the base of collecting the physical examination data of 323 pilots who had been consecutively recuperated for 3 times and completed 3 health indicator examinations in Air Force Healthcare Center for Special Services Hangzhou from January of 2017 to January of 2022. The pilots were divided into waist circumference <85 cm group, ≥85-90 cm group, and ≥90 cm group. According to their waist circumference change trend, they were divided into increased group (difference of waist circumference >0 cm) and decreased group (difference of waist circumference ≤0 cm). According to the 5-year change rate of waist circumference (Δ5), they were divided into waist circumference relative increased group (Δ5>3%), relative stable group (-3%≤Δ5≤3%), and relative decreased group (Δ5<-3%). The stratification of different waist circumference, the 5-year change rate of waist circumference and BMI, blood lipid indexes and abnormal rate of hyperlipidemia were compared. Waist circumference was measured and determined according to the relevant standards for flying personnel and adults.Results:①The mean waist circumference of 323 pilots was close to the value of pre-central obesity. The mean BMI had reached the overweight standard, and the mean TG and TC were at high end of normal values.②During the 5-year period, the values of blood lipid metabolism indicators were repeatedly measured 3 times, and the mean values of TG, TC, and LDL-C showed an increasing trend, with significant differences ( F=7.39, 9.49, 3.67, P=0.001,<0.001, =0.026) and the mean values of TG and TC of the third measurement had approached to high limit. ③The results of BMI, TG in 3 measurements, LDL-C in the first and third measurements, TC in the first measurement and the incidence of hyperlipidemia were all increased with the increase of waist circumference and the differences were significant ( F=3.06-133.39, χ2=9.08-22.99, all P<0.05); HDL-C decreased with the increase of waist circumference, with significant differences ( F=6.32, 9.78, 10.86, P=0.002, <0.001, <0.001). The mean BMI of the ≥85-90 cm group reached the overweight level in the 3 measurements. The mean values of TG and TC in the first 2 measurements were at high end of normal value, but the mean values in the third measurement were higher than the normal range. The mean values of BMI, TG, and TC in ≥90 cm group were all within the abnormal range. ④ The 5-year change rate of BMI and LDL-C in the waist circumference increased group were higher than those in the waist circumference decreased group ( F=26.02, 14.95, both P<0.001). ⑤The waist circumference relative stable and relative increased group had a higher incidence of new hyperlipidemia, with 27 cases (21.77%) and 24 cases (20.00%) respectively. The waist circumference relative decreased group had the highest improvement rate of hyperlipidemia in 5 cases (6.33%), but the difference was not significant (all P>0.05). Conclusions:The abnormal rates of waist circumference, BMI, and blood lipids in military pilots are relatively high and show an increasing trend. The changes in waist circumference are closely related to BMI and blood lipids, and maintaining waist circumference within a normal range helps to maintain stability of blood lipid metabolism.

Objective:To provide basis for personalized health interventions for military pilots by analyzing the longitudinal variation trend of waist circumference and its correlation with BMI and lipid metabolism indicators among military pilots.Methods:A retrospective analysis was used on the base of collecting the physical examination data of 323 pilots who had been consecutively recuperated for 3 times and completed 3 health indicator examinations in Air Force Healthcare Center for Special Services Hangzhou from January of 2017 to January of 2022. The pilots were divided into waist circumference <85 cm group, ≥85-90 cm group, and ≥90 cm group. According to their waist circumference change trend, they were divided into increased group (difference of waist circumference >0 cm) and decreased group (difference of waist circumference ≤0 cm). According to the 5-year change rate of waist circumference (Δ5), they were divided into waist circumference relative increased group (Δ5>3%), relative stable group (-3%≤Δ5≤3%), and relative decreased group (Δ5<-3%). The stratification of different waist circumference, the 5-year change rate of waist circumference and BMI, blood lipid indexes and abnormal rate of hyperlipidemia were compared. Waist circumference was measured and determined according to the relevant standards for flying personnel and adults.Results:①The mean waist circumference of 323 pilots was close to the value of pre-central obesity. The mean BMI had reached the overweight standard, and the mean TG and TC were at high end of normal values.②During the 5-year period, the values of blood lipid metabolism indicators were repeatedly measured 3 times, and the mean values of TG, TC, and LDL-C showed an increasing trend, with significant differences ( F=7.39, 9.49, 3.67, P=0.001,<0.001, =0.026) and the mean values of TG and TC of the third measurement had approached to high limit. ③The results of BMI, TG in 3 measurements, LDL-C in the first and third measurements, TC in the first measurement and the incidence of hyperlipidemia were all increased with the increase of waist circumference and the differences were significant ( F=3.06-133.39, χ2=9.08-22.99, all P<0.05); HDL-C decreased with the increase of waist circumference, with significant differences ( F=6.32, 9.78, 10.86, P=0.002, <0.001, <0.001). The mean BMI of the ≥85-90 cm group reached the overweight level in the 3 measurements. The mean values of TG and TC in the first 2 measurements were at high end of normal value, but the mean values in the third measurement were higher than the normal range. The mean values of BMI, TG, and TC in ≥90 cm group were all within the abnormal range. ④ The 5-year change rate of BMI and LDL-C in the waist circumference increased group were higher than those in the waist circumference decreased group ( F=26.02, 14.95, both P<0.001). ⑤The waist circumference relative stable and relative increased group had a higher incidence of new hyperlipidemia, with 27 cases (21.77%) and 24 cases (20.00%) respectively. The waist circumference relative decreased group had the highest improvement rate of hyperlipidemia in 5 cases (6.33%), but the difference was not significant (all P>0.05). Conclusions:The abnormal rates of waist circumference, BMI, and blood lipids in military pilots are relatively high and show an increasing trend. The changes in waist circumference are closely related to BMI and blood lipids, and maintaining waist circumference within a normal range helps to maintain stability of blood lipid metabolism.

Objective To evaluate the role of nuclear factor erythroid 2-related factor 2 ( Nrf2 ) signaling pathway in endoplasmic reticulum stress response during lipopolysaccharide ( LPS)-induced acute lung injury ( ALI) in mice. Methods Forty clean-grade healthy male C57BL∕6 mice, aged 6-8 weeks, weighing 22-26 g, were divided into 4 groups ( n=10 each) using a random number table method: control group ( group C) , group ALI, salubrinal group ( group S) and salubrinal plus brusatol group ( group S+B) . Animals were intratracheally instilled with 5 mg∕kg of LPS diluted in normal saline to establish the model of ALI. Animals were intratracheally instilled with 100 μl of normal saline in group C. Mice in group S were intraperitoneally injected with endoplasmic reticulum stress response inhibitor 1 mg∕kg salubrinal at 1 and 24 h after LPS instillation. Mice of group S+B were intraperitoneally injected with brusatol 2 mg∕kg once every other day for 10 days prior to LPS instillation, and the other treatments were similar to those previously de-scribed in group S. Mice were sacrificed at 48 h after LPS administration, and lungs were removed for mi-croscopic examination of the pathological changes of lung tissues which were scored and for determination of contents of IL-17A, tumor necrosis factor-alpha ( TNF-α) and interleukin-6 ( IL-6) in lung tissues ( by en-zyme-linked immunosorbent assay) and expression of Nrf2, CCAAT∕enhancer-binding protein homologous protein (CHOP) and caspase-12 in lung tissues (by Western blot). Lung water content was calculated. Results Compared with group C, the lung water content and contents of IL-17A, TNF-α and IL-6 were significantly increased, the expression of CHOP and caspase-12 in cytoplasma was up-regulated, and the ex-pression of Nrf2 in nuclei was down-regulated in ALI and S+B groups, and the lung water content and con-tents of IL-17A, TNF-α and IL-6 were significantly increased, the expression of Nrf2 in nuclei and CHOP in cytoplasma was up-regulated, and the expression of caspase-12 was down-regulated in group S ( P<0. 05) . Compared with group ALI, the lung water content and contents of IL-17A, TNF-α and IL-6 were significantly decreased, the expression of CHOP and caspase-12 in cytoplasma was down-regulated, the ex-pression of Nrf2 in nuclei was up-regulated ( P<0. 05) , and the pathological changes were significantly at-tenuated in group S. Compared with group S, the lung water content and contents of IL-17A, TNF-α and IL-6 were significantly increased, the expression of CHOP and caspase-12 in cytoplasma was up-regulated, the expression of Nrf2 in nuclei was down-regulated ( P<0. 05) , and the pathological changes of lung tis-sues were accentuated in group S+B. Conclusion Nrf2 signaling pathway is involved in the process of en-doplasmic reticulum stress response during LPS-induced ALI in mice.

With the progress of visualization technology, more and more visual tools were applied to anesthesia. It has accurate positioning, mild trauma, a high success rate and less complications for endotracheal intubation, which increase the safety and efficiency of airway management. Disposcope endoscope is an endotracheal intubation tool with a visual stylet, which has many advantages, such as visual, lens barrel can be bent and wireless transmission. This paper summarizes the current progress in the application of Disposcope endoscopy in tracheal intubation.

Objective To explore the measures and methods of the health management of the deep saturation diver candidates,and also to evaluate the effects of health management on the divers.Methods A professional health management was enforced on 37 saturation diver candidates who were to perform the 300 m saturation dive from June to December 2014.A comprehensive health evaluation on the changes in physical examination indexes,psychological symptoms scores,physical performance reserve and health assessment results was respectively made in June 2014 (before the implementation of health management) and December 2014 (6 months after the implementation of health management) by using the diver life style health promotion questionnaire survey.Results As compared with that before the implementation of professional health management,the diver health promotion life style was obviously improved following the implementation of professional health management.There was statistical significance in self-realization,interpersonal relationship,health obligations and stress management,when comparisons were made between pre and post implementation of health management.Physical performance reserve was considerably improved,and statistical significance could be noted in such indicators as push-ups,sit-ups and ground rotation.The qualified health rate was increased from 64.86％ to 81.08％,and the psychological factor was well maintained,which reached operational standards of saturation diving.Conclusions Systematic and scientific occupational health management of saturation divers could effectively promote their physical and mental health and was beneficial to the maintenance of their operational capability.

Objective To explore the measures and methods of the health management of the deep saturation diver candidates,and also to evaluate the effects of health management on the divers.Methods A professional health management was enforced on 37 saturation diver candidates who were to perform the 300 m saturation dive from June to December 2014.A comprehensive health evaluation on the changes in physical examination indexes,psychological symptoms scores,physical performance reserve and health assessment results was respectively made in June 2014 (before the implementation of health management) and December 2014 (6 months after the implementation of health management) by using the diver life style health promotion questionnaire survey.Results As compared with that before the implementation of professional health management,the diver health promotion life style was obviously improved following the implementation of professional health management.There was statistical significance in self-realization,interpersonal relationship,health obligations and stress management,when comparisons were made between pre and post implementation of health management.Physical performance reserve was considerably improved,and statistical significance could be noted in such indicators as push-ups,sit-ups and ground rotation.The qualified health rate was increased from 64.86％ to 81.08％,and the psychological factor was well maintained,which reached operational standards of saturation diving.Conclusions Systematic and scientific occupational health management of saturation divers could effectively promote their physical and mental health and was beneficial to the maintenance of their operational capability.

Through the development of “the Electronic Health File of Military Divers”, health support could be focused by various medical facilities , special service medical institutions and organic health support units , so that valuable data could be provided for systematic and sustained health support to the divers .The electronic health file mainly included the following 6 modules:basic infor-mation of the divers , diving records , diver training information , medical records , physical and mental quality assessment and occupation-al identification data , covering almost all the contents of health support for military divers .This system could provide an electronic man-agement instrument for acquiring accurate information of divers and for implementing diver -orientated occupational health support of divers .

Through the development of “the Electronic Health File of Military Divers”, health support could be focused by various medical facilities , special service medical institutions and organic health support units , so that valuable data could be provided for systematic and sustained health support to the divers .The electronic health file mainly included the following 6 modules:basic infor-mation of the divers , diving records , diver training information , medical records , physical and mental quality assessment and occupation-al identification data , covering almost all the contents of health support for military divers .This system could provide an electronic man-agement instrument for acquiring accurate information of divers and for implementing diver -orientated occupational health support of divers .