1.Construction of an ultrasound dynamic image segmentation model for thyroid nodules
Junpu HU ; Jialu LI ; Mengjie DOU ; Gang WANG ; Keyan LI ; Xiaofang FU ; Hao SUN ; Changqin SUN ; Duo SHI ; Yan LIAO ; Qiong WANG ; Faqin LYU
Chinese Journal of Ultrasonography 2025;34(6):518-524
Objective:To construct a thyroid nodule segmentation model using ultrasound dynamic images and explore its potential for assisting in the screening of thyroid nodules.Methods:A total of 126 patients with thyroid nodules(comprising 150 nodules)who were diagnosed and treated at Xuzhou Cancer Hospital from April 2024 to December 2024 were prospectively enrolled. Two-dimensional ultrasound was performed to capture short-axis and long-axis video images of thyroid nodules,forming a dynamic ultrasound image dataset. The dataset was divided into training,validation,and test sets in a ratio of 6∶1∶3. After the training loss curve converged,the model that performed well on the validation set was selected for testing. Three-fold cross-validation was employed for training and testing. All 300 ultrasound videos were divided into three subsets. In each experiment,two subsets were used as the training set,and one subset was used as the test set to evaluate the model's generalization ability. A collaborative spatiotemporal diffusion model was established based on the dynamic trends and tissue texture details of thyroid nodules. Six widely used segmentation metrics were employed to evaluate the model's application capabilities.Results:The study included 126 patients with 150 thyroid nodules,300 dynamic ultrasound images,and video lengths of 3-4 seconds per nodule,resulting in 12 312 segmented images. The size of the thyroid nodules was(10.7 ± 10.6)mm(transverse diameter)×(8.4 ± 6.3)mm(anteroposterior diameter). Among the nodules,62(41.3%)had clear boundaries,while 88(58.7%)had indistinct boundaries;61(40.7%)exhibited regular shapes,while 89(59.3%)were irregular;66(44.0%)had a taller-than-wide aspect ratio;and 70(46.7%)showed microcalcifications. The collaborative diffusion model based on dynamic ultrasound image segmentation achieved the following scores:a Jaccard score of(69.22 ± 0.03)%,a Dice score of(79.16 ± 0.18)%,a Precision score of(86.70 ± 0.17)%,a Recall score of(77.82 ± 0.04)%,an Sα score of(85.26 ± 0.01)%,and an Eθmn score of(90.58 ± 0.17)%. Compared to other models,this model demonstrated significant improvements across all evaluation metrics,achieving the highest values in each metric with increments of over 8% and 1%,respectively. Conclusions:The collaborative diffusion model with a dynamic controller,constructed based on dynamic ultrasound images of thyroid nodules,demonstrates excellent performance in ultrasound image segmentation. It improves the accuracy of thyroid nodule screening,thereby providing a valuable auxiliary diagnostic tool for clinical practice.
2.Automatic recognition and segmentation of brachial plexus in ultrasonic images based on deep learning
Duo SHI ; Han ZHANG ; Peipei LIU ; Ruichao ZHANG ; Qingyu LIU ; Hao SUN ; Xiaofang FU ; Mengjie DOU ; Junpu HU ; Changqin SUN ; Keyan LI ; Jianqiu HU ; Guangquan ZHOU ; Ligang CUI ; Ping ZHOU ; Faqin LYU
Chinese Journal of Ultrasonography 2025;34(9):737-744
Objective:To propose a deep learning(DL)-based ultrasound imaging auxiliary tool for automatic segmentation and recognition of the brachial plexus(BP),and to enhance the accuracy and safety of clinical procedures.Methods:It was a multicenter study that collected 773 healthy subjects from Peking University Third Hospital and its branch campuses,the Third Medical Center of the Chinese PLA General Hospital,and Shanghai Eighth People's Hospital between August 2024 and February 2025. Brachial plexus(BP)images in the interscalene groove were captured used high-frequency ultrasound by senior sonographers,a dataset comprising 1 289 standardized images were constructed and the improved model(CHA-TransUNet)was trained. The test set was input into 6 different models(CHA-TransUNet,R50-Unet,TransUnet,SegFormer,SwinUnet,MISSFormer)for segmentation. Segmentation accuracy was evaluated using metrics including the Dice similarity coefficient(DSC),95% Hausdorff distance(HD95)and mean intersection over union(mIoU),and was compared with the segmentation results of 3 ultrasound physicians with varying experience levels(junior physicians and senior physicians)to validate the model's segmentation efficacy.Results:The CHA-TransUNet model established based on a dataset of 1 289 standardized images achieved segmentation results for the BP with a DSC of 90.15%,mIoU of 91.02%,and HD95 of 8.08. Its accuracy was higher than other mainstream models(DSC:90.15% vs. 87.60%,87.77%,81.35%,84.78%,84.55%),significantly better than junior physicians(DSC:90.15% vs. 68.73%, Z=-127.76, P<0.001),and approached the level of senior physician(DSC:90.15% vs. 86.15%, Z=-31.33, P=0.549). The model demonstrated superior boundary recognition in complex anatomical structures(e.g.,C6/C7 nerve roots)compared to ultrasound physicians(junior and senior)(HD95:8.08 vs. 26.34,17.44,56.80). Conclusions:This study proposes an analysis model for BP ultrasound images,CHA-TransUNet. This model achieves segmentation and recognition of the BP with relatively complex pathways and structures. The model exhibits high accuracy and stability,outperforming current mainstream network models and junior physicians while approaching the performance level of senior physicians. It assists junior physicians or trainees in more accurately identifying and localizing the BP.
3.Screening of pyroptosis-related genes in pulmonary plague and molecular mechanisms based on bioinformatics analysis
Hao XIE ; Lingli AI ; Duo SU ; Lu LI ; Lingfei HU ; Dongsheng ZHOU ; Bo GAO ; Huiying YANG
Military Medical Sciences 2025;49(4):281-288
Objective To explore the biological functions of pyroptosis-related genes in pneumonic plague using bioinformatics methods,and to evaluate their potential applicability as diagnostic markers.Methods The pneumonic plague-related dataset GSE220123 was retrieved from the Gene Expression Omnibus(GEO)database and screened for differentially expressed pyroptosis-related genes(DE-PRGs).The functions of DE-PRGs were studied via Gene Ontology(GO),Kyoto Encyclopedia of Genes and Genomes(KEGG)enrichment analyses,and immune infiltration analysis.The hub genes were identified via protein-protein interaction(PPI)network analysis,and further screened for key genes with sustained high expression characteristics based on differential expression analysis.The relative expression levels of the key genes were verified using the reverse transcription real-time quantitative PCR(qPCR)method.Results A total of 17 DE-PRGs were screened,and PPI network analysis revealed 7 Hub genes.Among them,Casp4 continued to be up-regulated during the course of pneumonic plague.The results of reverse transcription qPCR were consistent with the those of bioinformatic analyses.Conclusion DE-PRGs play a crucial role in the immune response of pneumonic plague,especially Casp4,which has significant applications as a diagnostic biomarker and potential therapeutic target for pneumonic plague.
4.Preliminary efficacy observation of 3D printed functional spinal external fixation brace combined with McKenzie therapy in the treatment of lumbar disc herniation.
Ning-Xia WANG ; Ping CHEN ; Hai-Dong WANG ; Jing JI ; Fang-Hong NIAN ; Xin LIU ; Chong-Fei JIN ; Duo-Ming ZHAO ; Hao-Lin LI ; Wei-Gang CHENG ; Gui-Lin LAI ; Guo-Biao WU
China Journal of Orthopaedics and Traumatology 2025;38(10):1047-1054
OBJECTIVE:
To observe the clinical efficacy of 3D printing spinal external fixator combined with McKenzie therapy for patients with lumbar dics herniation (LDH).
METHODS:
Sixty patients with LDH between January 2022 and January 2023 were enrolled. Among them, 30 patients were given McKinsey training. According to different treatment methods, all patients were divided into McKenzie group and McKenzie + 3D printing group, 30 patients in each group. The McKenzie group provided McKenzie therapy. The McKenzie + 3D printing group were treated with 3D printing spinal external fixation brace on the basis of McKenzie therapy. Patients in both groups were between 25 and 60 years of age and had their first illness. In the McKenzie group, there were 19 males and 11 females, with an average age of (48.57±5.86) years old, and the disease duration was (7.03 ±2.39) months. The McKenzie + 3D printing group, there were 21 males and 9 females, with an average age of (48.80±5.92) years old, and the disease duration was(7.30±2.56) months. Pain was evaluated using the visual analogue scale (VAS), and lumbar spine function was assessed using the Oswestry disability index (ODI) and the Japanese Orthopaedic Association (JOA) score. VAS, ODI and JOA scores were compared between two groups before treatment and at 1, 3, 6, 9 and 12 months after treatment.
RESULTS:
All patients were followed up for 12 months. The VAS for the McKenzie combined with 3D printing group before treatment and at 1, 3, 6, 9, and 12 months post-treatment were(6.533±0.860), (5.133±1.008), (3.933±0.868), (2.900±0.759), (2.067±0.640), (1.433±0.504), respectively. In the McKenzie group, the corresponding scores were (6.467±0.860), (5.067±1.048), (4.600±0.968), (3.533±1.008), (2.567±0.728), (1.967±0.809), respectively. The ODI of the McKenzie group before treatment and at 1, 3, 6, 9, and 12 months post-treatment were (41.033±6.810)%, (37.933±6.209)%, (35.467±6.962)%, (27.567±10.081)%, (20.800±7.531)%, (13.533±5.158)%, respectively. For the McKenzie combined with 3D printing group, the corresponding ODI were(38.033±5.605)%, (33.000±6.192)%, (28.767±7.045)%, (22.200±5.517)%, (17.700±4.836)%, (11.900±2.771)%, respectively. The JOA scores of the McKenzie combined with 3D printing group before treatment and at 1, 3, 6, 9, and 12 months post-treatment were(8.900±2.074), (13.133±2.330), (15.700±3.583), (20.400±3.480), (22.267±3.084), (24.833±2.640), respectively. In the McKenzie group, the corresponding scores were(9.200±2.091), (12.267±2.406), (15.333±3.198), (18.467±2.240), (20.133±2.751), (22.467±2.849), respectively. Before the initiation of treatment, no statistically significant differences were observed in the VAS, ODI, and JOA scores between two groups (P>0.05). At 3, 6, 9, and 12 months post-treatment, the VAS in the McKenzie combined with 3D printing group was significantly lower than that in the McKenzie group, and the difference was statistically significant (P<0.05). The comparison of ODI between two groups at 1, 3, 6, 9, and 12 months post-treatment revealed statistically significant differences (P<0.05). At 6, 9, and 12 months post-treatment, the JOA score in the McKenzie combined with 3D printing group was significantly higher than that in the McKenzie-only group, and the difference was statistically significant (P<0.05).
CONCLUSION
The combination of 3D printed functional spinal external fixation brace with McKenzie therapy can significantly improve and maintain lumbar function in patients with LDH.
Humans
;
Male
;
Female
;
Middle Aged
;
Printing, Three-Dimensional
;
Intervertebral Disc Displacement/surgery*
;
External Fixators
;
Lumbar Vertebrae/surgery*
;
Adult
;
Braces
;
Treatment Outcome
5.The role and mechanism of ERK-mediated Drp1 signaling in exercise-induced skeletal muscle damage
Mengyu LI ; Hao DENG ; Shiqiao ZHENG ; Duo ZHANG ; Tianai YANG ; Ranggui MA ; Zhi XIA ; Huayu SHANG
Chinese Journal of Sports Medicine 2025;44(9):717-728
Objective To observe the effect of a heavy load exercise on the ultrastructure,function and fission of skeletal muscle mitochondria in rats,and to analyze the changes of the phosphorylation expression of mitochondrial fission protein and upstream kinase at different times postexercise,and to explore the effect of acute heavy load exercise on mitochondrial fission in skeletal muscle of rats and its possible mechanism.Methods Forty-eight adult male Sprague-Dawley rats were randomly divided in-to a quiet control group(C,n=8)and an exercise group(E,n=40).Rats in the E group exercised on a treadmill down a 16° decline at 16 m/min for 90 min and were further divided into 0 h,12 h,24 h,48 h,and 72 h postexercise subgroups.Soleus muscle was isolated and mitochondria were ex-tracted at the corresponding time points after exercise.The ultrastructure of mitochondria in the soleus muscle was observed using transmission electron microscopy,and mitochondrial quantity and morphomet-ric analysis were conducted.Moreover,the colocalization and quantity of dynamin-related protein 1(Drp1)and cytochrome C oxidease subunit Ⅳ(COXⅣ)in the soleus muscle were detected using im-munofluorescence double-labeling techniques.Meanwhile,protein levels of soleus musclep-Drp1Ser616,p-Drp1Ser637,p-extracellular regulatory protein kinaseThr202/Tyr204(p-ERKThr202/Tyr204),p-protein kinaseAThr197(p-PKAThr197),and mitochondrial NADH of ubiquinone oxidoreductase subunit B8(NDUFB8)and ubiqui-nol-cytochrome C reductase core protein 2(UQCRC2)were determined by using Western blotting.An-other twenty-four rats were randomly divided into a DMSO group(CD),a U0126 group(CU),an Ex-ercise+DMSO group(ED),and an Exercise+U0126 group(EU).Six mice in each group were giv-en a single intra-bitoneal injection of DMSO or ERK inhibitor U0126 20 min before acute downhill running.Then,their phosphorylated expressions of ERKThr202/Tyr204 and Drp1Ser616 in soleus muscle were de-tected by Western blotting.Results(1)From 0 h to 48 h after exercise,the soleus muscle mitochon-dria showed swelling,rounding,and uneven distribution of mitochondria,among which the degree of mitochondrial damage was the most serious at 12 h and 24 h after exercise.Moreover,the protein ex-pression of NDUFB8 and UQCRC2 in the mitochondria fractions from soleus muscle was significantly lower at 12 h post-exercise(P<0.05).(2)The co-localization of Drp1 and COXⅣ in the skeletal muscle increased significantly at 12 h to 24 h after a heavy load exercise compared with group C and group E0(P<0.01).Moreover,the mitochondrial area,circumference,aspect ratio and Ferret diameter in the skeletal muscle were significantly lower at 12 h to 24 h postexercise(P<0.05).Meanwhile,the number of mitochondria was significantly higher at 24 h after exercise(P<0.01).(3)The phosphoryla-tion of ERKThr202/Tyr204,PKAThr197 and Drp1Ser616 was significantly higher at 24 h after exercise(P<0.01),while that of Drp1Ser637 was significantly lower at 48 h and 72 h post-exercise(P<0.01).However,the phosphorylated expressions of ERKThr202/Tyr204 and Drp1Ser616 were significantly down-regulated by U0126 treatment before exercise.Conclusion A session of heavy load exercise caused mitochondrial structure and function damage and induced mitochondrial fission in the skeletal muscle,and then to maintain the homeostasis of skeletal muscle cells by cleaving damaged mitochondria.The mechanism of promot-ing skeletal muscle repair may be related to the positive and negative regulation of Drp1 activity by the phosphorylation of Drp1Ser616 and Drp1Ser637,respectively.Among them,the activation of ERKThr202/Tyr204 mediates the phosphorylation activation of Drp1Ser616,but PKAThr197 is not an upstream kinase that medi-ates the inactivation of Drp1Ser637 phosphorylation.
6.The role and mechanism of ERK-mediated Drp1 signaling in exercise-induced skeletal muscle damage
Mengyu LI ; Hao DENG ; Shiqiao ZHENG ; Duo ZHANG ; Tianai YANG ; Ranggui MA ; Zhi XIA ; Huayu SHANG
Chinese Journal of Sports Medicine 2025;44(9):717-728
Objective To observe the effect of a heavy load exercise on the ultrastructure,function and fission of skeletal muscle mitochondria in rats,and to analyze the changes of the phosphorylation expression of mitochondrial fission protein and upstream kinase at different times postexercise,and to explore the effect of acute heavy load exercise on mitochondrial fission in skeletal muscle of rats and its possible mechanism.Methods Forty-eight adult male Sprague-Dawley rats were randomly divided in-to a quiet control group(C,n=8)and an exercise group(E,n=40).Rats in the E group exercised on a treadmill down a 16° decline at 16 m/min for 90 min and were further divided into 0 h,12 h,24 h,48 h,and 72 h postexercise subgroups.Soleus muscle was isolated and mitochondria were ex-tracted at the corresponding time points after exercise.The ultrastructure of mitochondria in the soleus muscle was observed using transmission electron microscopy,and mitochondrial quantity and morphomet-ric analysis were conducted.Moreover,the colocalization and quantity of dynamin-related protein 1(Drp1)and cytochrome C oxidease subunit Ⅳ(COXⅣ)in the soleus muscle were detected using im-munofluorescence double-labeling techniques.Meanwhile,protein levels of soleus musclep-Drp1Ser616,p-Drp1Ser637,p-extracellular regulatory protein kinaseThr202/Tyr204(p-ERKThr202/Tyr204),p-protein kinaseAThr197(p-PKAThr197),and mitochondrial NADH of ubiquinone oxidoreductase subunit B8(NDUFB8)and ubiqui-nol-cytochrome C reductase core protein 2(UQCRC2)were determined by using Western blotting.An-other twenty-four rats were randomly divided into a DMSO group(CD),a U0126 group(CU),an Ex-ercise+DMSO group(ED),and an Exercise+U0126 group(EU).Six mice in each group were giv-en a single intra-bitoneal injection of DMSO or ERK inhibitor U0126 20 min before acute downhill running.Then,their phosphorylated expressions of ERKThr202/Tyr204 and Drp1Ser616 in soleus muscle were de-tected by Western blotting.Results(1)From 0 h to 48 h after exercise,the soleus muscle mitochon-dria showed swelling,rounding,and uneven distribution of mitochondria,among which the degree of mitochondrial damage was the most serious at 12 h and 24 h after exercise.Moreover,the protein ex-pression of NDUFB8 and UQCRC2 in the mitochondria fractions from soleus muscle was significantly lower at 12 h post-exercise(P<0.05).(2)The co-localization of Drp1 and COXⅣ in the skeletal muscle increased significantly at 12 h to 24 h after a heavy load exercise compared with group C and group E0(P<0.01).Moreover,the mitochondrial area,circumference,aspect ratio and Ferret diameter in the skeletal muscle were significantly lower at 12 h to 24 h postexercise(P<0.05).Meanwhile,the number of mitochondria was significantly higher at 24 h after exercise(P<0.01).(3)The phosphoryla-tion of ERKThr202/Tyr204,PKAThr197 and Drp1Ser616 was significantly higher at 24 h after exercise(P<0.01),while that of Drp1Ser637 was significantly lower at 48 h and 72 h post-exercise(P<0.01).However,the phosphorylated expressions of ERKThr202/Tyr204 and Drp1Ser616 were significantly down-regulated by U0126 treatment before exercise.Conclusion A session of heavy load exercise caused mitochondrial structure and function damage and induced mitochondrial fission in the skeletal muscle,and then to maintain the homeostasis of skeletal muscle cells by cleaving damaged mitochondria.The mechanism of promot-ing skeletal muscle repair may be related to the positive and negative regulation of Drp1 activity by the phosphorylation of Drp1Ser616 and Drp1Ser637,respectively.Among them,the activation of ERKThr202/Tyr204 mediates the phosphorylation activation of Drp1Ser616,but PKAThr197 is not an upstream kinase that medi-ates the inactivation of Drp1Ser637 phosphorylation.
7.Construction of an ultrasound dynamic image segmentation model for thyroid nodules
Junpu HU ; Jialu LI ; Mengjie DOU ; Gang WANG ; Keyan LI ; Xiaofang FU ; Hao SUN ; Changqin SUN ; Duo SHI ; Yan LIAO ; Qiong WANG ; Faqin LYU
Chinese Journal of Ultrasonography 2025;34(6):518-524
Objective:To construct a thyroid nodule segmentation model using ultrasound dynamic images and explore its potential for assisting in the screening of thyroid nodules.Methods:A total of 126 patients with thyroid nodules(comprising 150 nodules)who were diagnosed and treated at Xuzhou Cancer Hospital from April 2024 to December 2024 were prospectively enrolled. Two-dimensional ultrasound was performed to capture short-axis and long-axis video images of thyroid nodules,forming a dynamic ultrasound image dataset. The dataset was divided into training,validation,and test sets in a ratio of 6∶1∶3. After the training loss curve converged,the model that performed well on the validation set was selected for testing. Three-fold cross-validation was employed for training and testing. All 300 ultrasound videos were divided into three subsets. In each experiment,two subsets were used as the training set,and one subset was used as the test set to evaluate the model's generalization ability. A collaborative spatiotemporal diffusion model was established based on the dynamic trends and tissue texture details of thyroid nodules. Six widely used segmentation metrics were employed to evaluate the model's application capabilities.Results:The study included 126 patients with 150 thyroid nodules,300 dynamic ultrasound images,and video lengths of 3-4 seconds per nodule,resulting in 12 312 segmented images. The size of the thyroid nodules was(10.7 ± 10.6)mm(transverse diameter)×(8.4 ± 6.3)mm(anteroposterior diameter). Among the nodules,62(41.3%)had clear boundaries,while 88(58.7%)had indistinct boundaries;61(40.7%)exhibited regular shapes,while 89(59.3%)were irregular;66(44.0%)had a taller-than-wide aspect ratio;and 70(46.7%)showed microcalcifications. The collaborative diffusion model based on dynamic ultrasound image segmentation achieved the following scores:a Jaccard score of(69.22 ± 0.03)%,a Dice score of(79.16 ± 0.18)%,a Precision score of(86.70 ± 0.17)%,a Recall score of(77.82 ± 0.04)%,an Sα score of(85.26 ± 0.01)%,and an Eθmn score of(90.58 ± 0.17)%. Compared to other models,this model demonstrated significant improvements across all evaluation metrics,achieving the highest values in each metric with increments of over 8% and 1%,respectively. Conclusions:The collaborative diffusion model with a dynamic controller,constructed based on dynamic ultrasound images of thyroid nodules,demonstrates excellent performance in ultrasound image segmentation. It improves the accuracy of thyroid nodule screening,thereby providing a valuable auxiliary diagnostic tool for clinical practice.
8.Automatic recognition and segmentation of brachial plexus in ultrasonic images based on deep learning
Duo SHI ; Han ZHANG ; Peipei LIU ; Ruichao ZHANG ; Qingyu LIU ; Hao SUN ; Xiaofang FU ; Mengjie DOU ; Junpu HU ; Changqin SUN ; Keyan LI ; Jianqiu HU ; Guangquan ZHOU ; Ligang CUI ; Ping ZHOU ; Faqin LYU
Chinese Journal of Ultrasonography 2025;34(9):737-744
Objective:To propose a deep learning(DL)-based ultrasound imaging auxiliary tool for automatic segmentation and recognition of the brachial plexus(BP),and to enhance the accuracy and safety of clinical procedures.Methods:It was a multicenter study that collected 773 healthy subjects from Peking University Third Hospital and its branch campuses,the Third Medical Center of the Chinese PLA General Hospital,and Shanghai Eighth People's Hospital between August 2024 and February 2025. Brachial plexus(BP)images in the interscalene groove were captured used high-frequency ultrasound by senior sonographers,a dataset comprising 1 289 standardized images were constructed and the improved model(CHA-TransUNet)was trained. The test set was input into 6 different models(CHA-TransUNet,R50-Unet,TransUnet,SegFormer,SwinUnet,MISSFormer)for segmentation. Segmentation accuracy was evaluated using metrics including the Dice similarity coefficient(DSC),95% Hausdorff distance(HD95)and mean intersection over union(mIoU),and was compared with the segmentation results of 3 ultrasound physicians with varying experience levels(junior physicians and senior physicians)to validate the model's segmentation efficacy.Results:The CHA-TransUNet model established based on a dataset of 1 289 standardized images achieved segmentation results for the BP with a DSC of 90.15%,mIoU of 91.02%,and HD95 of 8.08. Its accuracy was higher than other mainstream models(DSC:90.15% vs. 87.60%,87.77%,81.35%,84.78%,84.55%),significantly better than junior physicians(DSC:90.15% vs. 68.73%, Z=-127.76, P<0.001),and approached the level of senior physician(DSC:90.15% vs. 86.15%, Z=-31.33, P=0.549). The model demonstrated superior boundary recognition in complex anatomical structures(e.g.,C6/C7 nerve roots)compared to ultrasound physicians(junior and senior)(HD95:8.08 vs. 26.34,17.44,56.80). Conclusions:This study proposes an analysis model for BP ultrasound images,CHA-TransUNet. This model achieves segmentation and recognition of the BP with relatively complex pathways and structures. The model exhibits high accuracy and stability,outperforming current mainstream network models and junior physicians while approaching the performance level of senior physicians. It assists junior physicians or trainees in more accurately identifying and localizing the BP.
9.Radon concentration and related employees’ chromosome aberration and micronuclei in subways in a city of Zhejiang Province
Zhiqiang XUAN ; Xinyu HUANG ; Zhongjun LAI ; Jiadi GUO ; Xiaoji HAO ; Shunfei YU ; Yiyao CAO ; Donghang WANG ; Duo ZHANG ; Jihua NIE
Journal of Environmental and Occupational Medicine 2024;41(9):1025-1031
Background Excessive radon exposure is considered the second risk factor for lung cancer. Since the opening of the subway in a city of Zhejiang Province, the exposure level of radioactive gas radon in subway stations and its impact on occupational health have become one of the important issues of public concern. Objective To monitor the radon concentration of subways in a city in Zhejiang Province and explore the effect of radon exposure on chromosome aberration and micronuclei in the working population. Methods A total of 55 vehicle control rooms of 55 stations affiliated to two different subway lines in a city were measured for one year; the 110 ticket offices and 55 security checkpoints from the same 55 stations were measured from 16 March to 14 June. The radon concentrations were compared by job types, subway lines, and seasons referring to Measurement methods for determination of radon in environmental air (HJ 1212-2021). Peripheral blood lymphocyte chromosome aberration and micronucleus analyses were conducted in 165 subway workers from monitoring sites for three different job types, then the influencing factors were analyzed. The detection methods were adopted from the standards of Test and assessment of chromosomal aberrations on occupational health examinations for radiation workers (GBZ/T 248-2014) and Standard for the method of micronucleus detection in lymphocytes on occupational health examination for radiation workers and exposure dose estimation (GBZ/T 328-2023). Results The radon concentration range of the target subways in Zhejiang Province was 10-320 Bq·m−3, all lower than the national limit (≤400 Bq·m−3). The differences in radon radioactivity levels among different lines, job types, and time segments were statistically significant (P<0.05). The rates of chromosomal aberration and micronucleus formation among the 165 subjects were 0.224% and 0.024%, respectively. There were significant differences in the rates of chromosome aberration and micronuclei among different jobs (vehicle control room, ticket office, security checkpoint) (P<0.05), but the abnormal rates were lower than the limits of the corresponding national standard. No significant correlation was found between jobs and chromosomal aberrations or micronuclei (P>0.05). Chromosome aberration and micronuclei varied by age, subway station seniority, and smoking (P<0.05). No effect of the above factors on chromosome aberration and micronuclei was observed by logistic regression (P>0.05). Conclusion The radon concentration in the target subway system is at a normal level. The rates of chromosomal aberration and micronucleus formation vary by jobs, but both are lower than the corresponding national limits. Therefore, radon exposure has not yet caused outstanding health impact on the subway workers.
10.Unsupervised clustering analysis based on multidimensional features reveals distinct clinical characteristics and associated factors of different phenotypes in patients with chronic rhinosinusitis with nasal polyp
Jingyu HUANG ; Yongge LUO ; Hao LYU ; Duo LIU ; Yunfei WANG ; Peiqiang LIU ; Lu TAN ; Rong XIANG ; Wei ZHANG ; Yu XU
Chinese Journal of Otorhinolaryngology Head and Neck Surgery 2024;59(6):590-601
Objective:To utilize routinely available clinical parameters to uncover the clinical features of different clusters in patients with chronic rhinosinusitis with nasal polyp (CRSwNP) through unsupervised clustering analysis.Methods:The clinical data from 155 CRSwNP patients undergoing nasal endoscopic surgery at Renmin Hospital of Wuhan University from 2021 to 2023 were prospectively collected, including 112 males and 43 females, aged from 7 to 87 years. Unsupervised clustering analysis was conducted using various clinical parameters, including age, gender, smoking and drinking history, local eosinophil (EOS) and neutrophil (NEU) counts, comorbid allergic rhinitis (AR), comorbid asthma, recurrence status, serum-specific IgE, total IgE, cytokine levels, peripheral blood EOS count and percentage, Lund-Mackay CT score, the ratio of CT scores for the maxillary sinus and ethmoid sinus (E/M ratio), visual analogue scale (VAS) score, Lund-Kennedy endoscopic score, and other common clinical indicators to elucidate the clinical characteristics of each cluster. Statistical analysis was conducted using GraphPad Prism 9.5 software.Results:Hierarchical clustering analysis identified four main clusters (Cluster A1-A4), showcasing distinct characteristics such as mild nasal polyps with higher peripheral blood cytokines levels, nasal polyps accompanied by allergies and asthma, a subtype of nasal polyps with high recurrence rates dominated by neutrophils, and nasal polyps with high eosinophil levels. Further subset clustering revealed two clusters of mild polyps (Cluster B1-B2) featuring high cytokine expression and comorbid AR; and two clusters of severe polyps (Cluster B3-B4) presented with severe symptoms, high Lund-Mackay CT score, and high Lund-Kennedy endoscopic score. Variations between Cluster B3 and B4 included symptom complexity, the degree of eosinophil infiltration, and the probability of comorbid asthma. Further clustering analysis for eosinophilic nasal polyps revealed a cluster characterized by highly neutrophilic infiltration and recurrent nasal polyps. The comprehensive analysis of multi-index correlations demonstrated valuable insights into the relationships between common clinical parameters of nasal polyps, providing valuable information for a deeper understanding of the pathogenesis of CRSwNP.Conclusion:The clustering analysis in this study categorizes CRSwNP patients into different clusters based on clinical features and disease outcomes, providing a new perspective for more precise clinical treatment strategies.

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