Real-time, noninvasive programmed death-ligand 1 (PD-L1) testing using molecular imaging has enhanced our understanding of the immune environments of neoplasms and has served as a guide for immunotherapy. However, the utilization of radiotracers in the imaging of human brain tumors using positron emission tomography/computed tomography (PET/CT) remains limited. This investigation involved the synthesis of [¹⁸F]AlF-NOTA-PCP2, which is a novel peptide-based radiolabeled tracer that targets PD-L1, and evaluated its imaging capabilities in orthotopic glioblastoma (GBM) models. Using this tracer, we could noninvasively monitor radiation-induced PD-L1 changes in GBM. [¹⁸F]AlF-NOTA-PCP2 exhibited high radiochemical purity (>95%) and stability up to 4 h after synthesis. It demonstrated specific, high-affinity binding to PD-L1 in vitro and in vivo, with a dissociation constant of 0.24 nM. PET/CT imaging, integrated with contrast-enhanced magnetic resonance imaging, revealed significant accumulation of [¹⁸F]AlF-NOTA-PCP2 in orthotopic tumors, correlating with blood-brain barrier disruption. After radiotherapy (15 Gy), [¹⁸F]AlF-NOTA-PCP2 uptake in tumors increased from 9.51% ± 0.73% to 12.04% ± 1.43%, indicating enhanced PD-L1 expression consistent with immunohistochemistry findings. Fractionated radiation (5 Gy × 3) further amplified PD-L1 upregulation (13.9% ± 1.54% ID/cc) compared with a single dose (11.48% ± 1.05% ID/cc). Taken together, [¹⁸F]AlF-NOTA-PCP2 may be a valuable tool for noninvasively monitoring PD-L1 expression in brain tumors after radiotherapy.

Objective:To explore the predictive value of the combined application of total prostate-specific antigen (TPSA), vascular endothelial growth factor A (VEGF-A), and interleukin (IL) in predicting postoperative biochemical recurrence in patients with prostate cancer.Methods:This study adopted a retrospective cohort research method. 202 male prostate cancer patients who visited Xi′an Gaoxin Hospital from April 2021 to January 2024 were selected as the research subjects. The age of the patients was 68(64, 71) years, and their postoperative conditions were classified into the non-recurrence group ( n=144) and the biochemical recurrence group ( n=58). The general clinical data and serumological test indicators SA, free prostate-specific antigen (FPSA), VEGF-A, IL-6, IL-17] were detected and compared between the two groups. Quantitative data with normal distribution were expressed as mean±standard deviation, and the comparison between groups was performed using the independent sample t-test; non-normal distribution quantitative data were expressed as M( Q1, Q3), and the comparison between groups was performed using the Mann-Whitney U test. The comparison between groups of count data was performed using the chi-square test. Through Spearman correlation analysis and multivariate Logistic regression analysis, the risk factors for biochemical recurrence after surgery in prostate cancer patients were screened out, and the efficacy of the combined prediction model based on TPSA, VEGF-A, and IL-17 was evaluated by receiver operating characteristic (ROC) curve, decision curve (DCA), and calibration curve. Results:The average tumor diameter, proportion of positive surgical margins, proportion of seminal vesicle invasion, and proportion of patients with Gleason score 3-5 in the biochemical recurrence group were significantly higher than those in the non-recurrence group ( P<0.05). The serumological indicators TPSA, VEGF-A, IL-6, IL-17 in the biochemical recurrence group were 44.28 (42.37, 48.57) ng/mL, (28.24±3.99) ng/mL, (39.14±2.95) ng/L and (66.64±6.04) pg/mL; those in the non-recurrence group were 41.25 (36.61, 43.56) ng/mL, (23.52±3.75) ng/mL, (37.19±4.19) ng/L, and (57.31±6.63) pg/mL. The biochemical recurrence group was higher than the non-recurrence group, and the difference was statistically significant ( P<0.05). Spearman correlation analysis and Logistic regression analysis found that TPSA, VEGF-A, and IL-17 were risk factors for biochemical recurrence after surgery in prostate cancer patients ( P<0.05); the DCA curve and calibration curve indicated that the combined prediction model based on TPSA, VEGF-A, and IL-17 had good accuracy (Hosmer-Lemeshow P=0.421), and the ROC curve suggested that the efficacy of the above indicators combined for predicting biochemical recurrence after surgery in prostate cancer patients was higher [AUC (95% CI)=0.899 (0.832-0.966)], and higher than the independent predictive efficacy of each indicator. Conclusion:Continuous monitoring of serum TPSA, VEGF-A, and IL-17 levels can effectively predict the risk of postoperative recurrence in prostate cancer patients and also provide biological markers for preventing disease recurrence.

Real-time,noninvasive programmed death-ligand 1(PD-L1)testing using molecular imaging has enhanced our understanding of the immune environments of neoplasms and has served as a guide for immunotherapy.However,the utilization of radiotracers in the imaging of human brain tumors using positron emission tomography/computed tomography(PET/CT)remains limited.This investigation involved the synthesis of[18F]AlF-NOTA-PCP2,which is a novel peptide-based radiolabeled tracer that targets PD-L1,and evaluated its imaging capabilities in orthotopic glioblastoma(GBM)models.Using this tracer,we could noninvasively monitor radiation-induced PD-L1 changes in GBM.[18F]AlF-NOTA-PCP2 exhibited high radiochemical purity(＞95％)and stability up to 4 h after synthesis.It demonstrated specific,high-affinity binding to PD-L1 in vitro and in vivo,with a dissociation constant of 0.24 nM.PET/CT imaging,integrated with contrast-enhanced magnetic resonance imaging,revealed significant accumulation of[18F]AlF-NOTA-PCP2 in orthotopic tumors,correlating with blood-brain barrier disruption.After radiotherapy(15 Gy),[18F]AlF-NOTA-PCP2 uptake in tumors increased from 9.51％±0.73％to 12.04％±1.43％,indicating enhanced PD-L1 expression consistent with immunohisto-chemistry findings.Fractionated radiation(5 Gy × 3)further amplified PD-L1 upregulation(13.9％±1.54％ID/cc)compared with a single dose(11.48％±1.05％ID/cc).Taken together,[18F]AlF-NOTA-PCP2 may be a valuable tool for noninvasively monitoring PD-L1 expression in brain tumors after radiotherapy.

Objective:To investigate the effects of spinal cord injury(SCI)on neuropathic pain(NP)and cognitive dysfunction in mice,as well as the activation of neurons in the anterior cingulate cortex(ACC),in order to provide experimental evidence for the connection between NP and cognitive dysfunction following SCI.Methods:Ten 8-week-old male C57BL/6J mice were used to prepare a model of spinal cord hemisection(SCI).Pain behavior and cognitive function of mice after SCI were assessed using von Frey,thermal stimulation,and Morris water maze behavioral experi-ments.Immunofluorescence staining were used to analyze the expression of c-Fos and GAD67/VGLUT2 positive cells in the anterior cingulate cortex(ACC)of the SCI model mice.Results:Compared with the Sham group,the SCI group of mice showed a significant decrease in mechanical threshold and thermal pain threshold(P＜0.05).The Morris water maze results indicated a significantly prolonged escape latency(P＜0.05)and a significant reduction in the use of search strategies for locating the hidden platform.Immunofluorescence results showed a significant increase in the num-ber of c-Fos positive cells in the ACC(P＜0.05),which were mainly co-labeled with excitatory neuron marker VGLUT2 positive cells.Conclusion:SCI leads to abnormal pain behavior and cognitive dysfunction in mice,and it induces the activation of neurons in the ACC,with a predominant activation of excitatory neurons.This study provides morphological evidence for the involvement of excitatory neurons in the ACC in the comorbidity of NP and cognitive impairment following SCI.

Objective This study aims to develop and evaluate an emergency medical information management system for the medical rescue of mass casualties in public health emergencies at civil airports,focusing on on-site triage and emergency treatment.Methods A retrospective analysis was conducted to compare the effects of on-site emergency drills for mass-casualty rescue in public health emergencies at the Guangzhou Baiyun International Airport Emergency Center in 2018 and 2024.The 2018 drills involving 21 casualties for which conventional emergency medical rescue equipment and procedures were utilized were set as a control group,while the 2024 drills involving 19 casualties for which an emergency medical information processing system were set as an experimental group.Data were analyzed using descriptive epidemiology,chi-square test,and t-test in terms of in-jury conditions,triage time,and total transfer and handover time.By integrating the entire process and all elements to achieve in-formation-based handling in the practical emergency medical rescue drills,the role and advantages of the emergency medical in-formation processing system in scientific command,rapid response,rapid triage,and emergency treatment for mass casualties in public health emergencies were examined.Results The two drills had no difference in the number of casualties(x2=0.054,P=0.973).The time spent on casualty triage and the total time for transfer and handover in 2024 were significantly reduced com-pared with those in 2018(t′=18.992,14.787,both P＜0.001).Conclusion The emergency medical information management system enhances the command,response capabilities and rescue efficiency and level of emergency medical rescue of mass casual-ties in public health emergencies at civil airports.It has promoted the informatization,digitalization and intelligence construction of emergency medical rescue for public health emergencies at civil airports in China,thereby offering a reference for optimizing the informatization model of emergency medical rescue at civil airports in China.

Objective:To investigate the effects of spinal cord injury(SCI)on neuropathic pain(NP)and cognitive dysfunction in mice,as well as the activation of neurons in the anterior cingulate cortex(ACC),in order to provide experimental evidence for the connection between NP and cognitive dysfunction following SCI.Methods:Ten 8-week-old male C57BL/6J mice were used to prepare a model of spinal cord hemisection(SCI).Pain behavior and cognitive function of mice after SCI were assessed using von Frey,thermal stimulation,and Morris water maze behavioral experi-ments.Immunofluorescence staining were used to analyze the expression of c-Fos and GAD67/VGLUT2 positive cells in the anterior cingulate cortex(ACC)of the SCI model mice.Results:Compared with the Sham group,the SCI group of mice showed a significant decrease in mechanical threshold and thermal pain threshold(P＜0.05).The Morris water maze results indicated a significantly prolonged escape latency(P＜0.05)and a significant reduction in the use of search strategies for locating the hidden platform.Immunofluorescence results showed a significant increase in the num-ber of c-Fos positive cells in the ACC(P＜0.05),which were mainly co-labeled with excitatory neuron marker VGLUT2 positive cells.Conclusion:SCI leads to abnormal pain behavior and cognitive dysfunction in mice,and it induces the activation of neurons in the ACC,with a predominant activation of excitatory neurons.This study provides morphological evidence for the involvement of excitatory neurons in the ACC in the comorbidity of NP and cognitive impairment following SCI.

Objective This study aims to develop and evaluate an emergency medical information management system for the medical rescue of mass casualties in public health emergencies at civil airports,focusing on on-site triage and emergency treatment.Methods A retrospective analysis was conducted to compare the effects of on-site emergency drills for mass-casualty rescue in public health emergencies at the Guangzhou Baiyun International Airport Emergency Center in 2018 and 2024.The 2018 drills involving 21 casualties for which conventional emergency medical rescue equipment and procedures were utilized were set as a control group,while the 2024 drills involving 19 casualties for which an emergency medical information processing system were set as an experimental group.Data were analyzed using descriptive epidemiology,chi-square test,and t-test in terms of in-jury conditions,triage time,and total transfer and handover time.By integrating the entire process and all elements to achieve in-formation-based handling in the practical emergency medical rescue drills,the role and advantages of the emergency medical in-formation processing system in scientific command,rapid response,rapid triage,and emergency treatment for mass casualties in public health emergencies were examined.Results The two drills had no difference in the number of casualties(x2=0.054,P=0.973).The time spent on casualty triage and the total time for transfer and handover in 2024 were significantly reduced com-pared with those in 2018(t′=18.992,14.787,both P＜0.001).Conclusion The emergency medical information management system enhances the command,response capabilities and rescue efficiency and level of emergency medical rescue of mass casual-ties in public health emergencies at civil airports.It has promoted the informatization,digitalization and intelligence construction of emergency medical rescue for public health emergencies at civil airports in China,thereby offering a reference for optimizing the informatization model of emergency medical rescue at civil airports in China.

Purpose: This study explored the association of the elasticity modulus and shear wave velocity (SWV) of the tibialis anterior muscle, as measured by two-dimensional shear wave elastography (2D-SWE), with the intracompartmental pressure (ICP) determined using the Whitesides method in a New Zealand rabbit model of acute compartment syndrome (ACS). Additionally, it evaluated the viability of 2D-SWE as a noninvasive, quantitative tool for the early detection of ACS. Methods: An ACS model was established through direct external compression by applying pressure bandaging to the lower legs of 15 New Zealand rabbits using neonatal blood pressure cuffs. Another five animals represented a non-modeled control group. To measure the elasticity modulus and SWV of the tibialis anterior muscles, 2D-SWE was employed. Blood oxygen saturation, serum creatine kinase (CK), and myoglobin levels were monitored. Subsequently, the anterior tibial compartment was dissected, and the tibialis anterior was removed for hematoxylin and eosin staining to assess muscle injury. Results: The elasticity modulus and SWV of the tibialis anterior muscle increased with compression duration, as did serum CK and myoglobin levels. ICP was strongly positively correlated with these parameters, particularly mean velocity (r=0.942, P<0.001) and CK (r=0.942, P<0.001). Blood oxygen saturation was negatively correlated with ICP (r=-0.887, P<0.001). Histological analysis indicated progressive muscle cell swelling over time, with damage transitioning from reversible to irreversible and culminating in necrosis. Conclusion In a rabbit ACS model, ICP was strongly positively correlated with muscle elasticity modulus/SWV. Consequently, 2D-SWE may represent a novel tool for assessing early-phase ACS.

Purpose: This study explored the association of the elasticity modulus and shear wave velocity (SWV) of the tibialis anterior muscle, as measured by two-dimensional shear wave elastography (2D-SWE), with the intracompartmental pressure (ICP) determined using the Whitesides method in a New Zealand rabbit model of acute compartment syndrome (ACS). Additionally, it evaluated the viability of 2D-SWE as a noninvasive, quantitative tool for the early detection of ACS. Methods: An ACS model was established through direct external compression by applying pressure bandaging to the lower legs of 15 New Zealand rabbits using neonatal blood pressure cuffs. Another five animals represented a non-modeled control group. To measure the elasticity modulus and SWV of the tibialis anterior muscles, 2D-SWE was employed. Blood oxygen saturation, serum creatine kinase (CK), and myoglobin levels were monitored. Subsequently, the anterior tibial compartment was dissected, and the tibialis anterior was removed for hematoxylin and eosin staining to assess muscle injury. Results: The elasticity modulus and SWV of the tibialis anterior muscle increased with compression duration, as did serum CK and myoglobin levels. ICP was strongly positively correlated with these parameters, particularly mean velocity (r=0.942, P<0.001) and CK (r=0.942, P<0.001). Blood oxygen saturation was negatively correlated with ICP (r=-0.887, P<0.001). Histological analysis indicated progressive muscle cell swelling over time, with damage transitioning from reversible to irreversible and culminating in necrosis. Conclusion In a rabbit ACS model, ICP was strongly positively correlated with muscle elasticity modulus/SWV. Consequently, 2D-SWE may represent a novel tool for assessing early-phase ACS.

Purpose: This study explored the association of the elasticity modulus and shear wave velocity (SWV) of the tibialis anterior muscle, as measured by two-dimensional shear wave elastography (2D-SWE), with the intracompartmental pressure (ICP) determined using the Whitesides method in a New Zealand rabbit model of acute compartment syndrome (ACS). Additionally, it evaluated the viability of 2D-SWE as a noninvasive, quantitative tool for the early detection of ACS. Methods: An ACS model was established through direct external compression by applying pressure bandaging to the lower legs of 15 New Zealand rabbits using neonatal blood pressure cuffs. Another five animals represented a non-modeled control group. To measure the elasticity modulus and SWV of the tibialis anterior muscles, 2D-SWE was employed. Blood oxygen saturation, serum creatine kinase (CK), and myoglobin levels were monitored. Subsequently, the anterior tibial compartment was dissected, and the tibialis anterior was removed for hematoxylin and eosin staining to assess muscle injury. Results: The elasticity modulus and SWV of the tibialis anterior muscle increased with compression duration, as did serum CK and myoglobin levels. ICP was strongly positively correlated with these parameters, particularly mean velocity (r=0.942, P<0.001) and CK (r=0.942, P<0.001). Blood oxygen saturation was negatively correlated with ICP (r=-0.887, P<0.001). Histological analysis indicated progressive muscle cell swelling over time, with damage transitioning from reversible to irreversible and culminating in necrosis. Conclusion In a rabbit ACS model, ICP was strongly positively correlated with muscle elasticity modulus/SWV. Consequently, 2D-SWE may represent a novel tool for assessing early-phase ACS.