1.Molecular Mechanism and Therapeutic Exploration of CD36 in Breast Cancer
Shengqiao FU ; Qian JI ; Xinyu SUN ; Xi PU ; Yuting WU ; Haowei TANG ; Wanying SHENG ; Xu WANG
Cancer Research on Prevention and Treatment 2024;51(5):380-385
Breast cancer is the most diagnosed cancer in women worldwide and the leading cause of most cancer-related deaths,posing a serious threat to women′s health worldwide.At present,although the prognosis of some patients with breast cancer has improved,the emergence of drug resistance and the metastasis and recurrence of breast cancer are still the main reasons for poor prognosis.CD36 is a multiligand transmembrane glycoprotein expressed on various cell types.In recent years,studies have confirmed that CD36 can reshape the lipid metabolism of cancer cells;promote the differentiation of tumor-related macrophages into M2 type and recruitment into tumor tissues;regulate the function of Treg cells,CD8+T cells,DCs,and other immune cells,and thus promote tumor development.In addition,CD36 is also associated with breast cancer stem cells,metastasis-initiating cells,and breast drug resistant cells.Therefore,CD36 could be an important potential therapeutic target for breast cancer.
2.Discussion on the pathogenesis and treatment of non-alcoholic fatty liver disease in postmenopausal women based on the theory of "deficient qi and stagnation"
Mingyao XU ; Wenyuan SU ; Jing WU ; Jiawen HE ; Haowei ZHANG ; Jinjuan LI ; Jia YUE ; Yan ZHANG
Journal of Beijing University of Traditional Chinese Medicine 2024;47(12):1745-1752
Non-alcoholic fatty liver disease is a common chronic liver disease in clinical practice. In recent years, with increasing social attention to the health of women and the elderly, the prevention and treatment of non-alcoholic fatty liver disease after menopause has increasingly become a research hotspot in metabolic diseases. This study explores the pathogenesis and treatment method of non-alcoholic fatty liver disease in postmenopausal women based on the theory of "deficient qi and stagnation" and combined with the physiological and pathological characteristics of postmenopausal women and the Western medicine understanding of non-alcoholic fatty liver disease. We believe that the pathogenesis of non-alcoholic fatty liver disease in postmenopausal women is rooted in the "deficient qi" caused by depletion of liver and kidney essence and blood. The imbalance between the physical and functional aspects of the liver due to this "deficient qi" is the primary factor, while the "stagnation" of phlegm and blood stasis is the manifestation. Furthermore, the "deficient qi" and "stagnation" reinforce each other, with the deficiency leading to stagnation and stagnation exacerbating the deficiency, thus accelerating the progression of the disease. The treatment approach should be one that combines nourishing deficiency and resolving stagnation, addressing both root cause and maifestations. Given the female characteristic of "the liver as the innate organ" and the post-menopausal physiological state of "gradual decline of kidney essence", it is important to focus on nourishing the liver and kidneys, nurturing the liver′s physical body while maintaining its function, and also promoting the circulation of qi, resolving phlegm, and invigorating blood circulation to remove blood stasis. This approach aims to reduce the accumulation of lipids in the liver, offering a new perspective and approach for the treatment of non-alcoholic fatty liver disease in post-menopausal women with traditional Chinese medicine.
3.Research progress in roles of olfactory stimulation in improving cognitive dysfunction
Wei ZHU ; Haowei WU ; Donggang XU
Military Medical Sciences 2024;48(9):701-707
Cognitive dysfunction,predominantly a consequence of neurodegenerative disorders,is a burgeoning health issue.Odor molecules have the unique ability to circumvent the blood-brain barrier through the olfactory pathway,exerting a direct influence on cognitive-related brain regions including the entorhinal cortex,hippocampus,and amygdala,without transiting through the thalamus.These olfactory molecules,mostly sourced from natural plant essential oils,are character-ized by significant volatility,minimal adverse reactions,and abundant availability.Hence,research into and applications of olfactory stimulation in improving cognitive dysfunction have raised widespread concerns.This article reviews the rela-tionship between the olfactory pathway and cognitive brain regions,and explores the mechanism by which natural plant es-sential oils alleviate cognitive dysfunction through olfactory stimulation in order to provide a reference for improving cogni-tive function via olfactory stimulation.
4.Effects of rosemary essential oil inhalation on memory function of sleep-deprived mice and underlying mechanisms
Wei ZHU ; Haowei WU ; Wenliang FU ; Chao ZHANG ; Peng JIN ; Weiwei XING ; Donggang XU
Military Medical Sciences 2024;48(10):760-766
Objective To study the influence of rosemary essential oil inhalation on the memory of mice experiencing sleep deprivation and to delineate the possible mechanisms involved.Methods C57BL/6J mice were randomly divided into four experimental groups in this study:a control group(Con),a control group with rosemary essential oil inhalation(Con+REO),a sleep deprivation group(SD)and a sleep deprivation group with rosemary essential oil inhalation(SD+REO).A 72-hour sleep deprivation model was induced using the multiple platform water environment method,with the Con+REO and SD+REO groups exposed to rosemary essential oil inhalation.Cognitive function was evaluated through Y-maze and novel object recognition tests.The hippocampal tissue was analyzed for superoxide dismutase(SOD)activity and the concentrations of malondialdehyde(MDA)and glutathione(GSH).ELISA was used to determine the levels of norepinephrine(NE),dopamine(DA),and serotonin 5-hydroxytryptamine(5-HT)in the hippocampus.The expression levels of postsynaptic density 95(PSD95)and brain-derived neurotrophic factor(BDNF)in the hippocampus were determined using immunoblotting techniques.Results Compared with the Con and Con+REO groups,the SD group demonstrated a significant reduction in the spontaneous alternation percentage in the Y-maze as well as the novel object recognition index.Additionally,there was a pronounced decrease in hippocampal SOD activity and GSH content,a substantial elevation in MDA levels,and a decrease in the levels of DA,NE,and 5-HT.The expressions of PSD95 and BDNF proteins also decreased.In comparison with the SD group,the SD+REO group exhibited a significant increase in the spontaneous alternation percentage in the Y-maze and the novel object recognition index.There was also a marked increase in hippocampal SOD activity and GSH content,a reduction in MDA levels and elevated levels of NE and DA.Moreover,the expressions of PSD95 and BDNF proteins were upregulated.Conclusion The inhalation of rosemary essential oil enhances the memory of sleep-deprived mice,and the underlying mechanism may involve the mitigation of oxidative stress within the hippocampal tissue,the modulation of neurotransmitter levels,and the facilitation of synaptic plasticity.
5.Effectiveness and prognosis of improved domestic neonatal ureteral stents for intrauterine treatment of fetal chylothorax
Ya WANG ; Haowei XU ; Huirong TANG ; Chenyan DAI ; Yuan WANG ; Jie QIU ; Rui CHENG ; Mingming ZHENG
Chinese Journal of Perinatal Medicine 2024;27(10):802-808
Objective:To investigate the effectiveness and prognosis of using improved domestic neonatal ureteral stents (referred to as improved double-J stents) for thoraco-amniotic shunting (TAS) in treating fetal chylothorax.Methods:A retrospective analysis was conducted on the clinical data of 21 cases of fetal chylothorax treated with TAS using improved double-J stents at Nanjing Drum Tower Hospital, Nanjing University Medical School from April 1, 2018, to September 30, 2023. Surgical complications and perinatal outcomes were summarized, and the development of surviving infants in five domains (communication, gross motor, fine motor, problem-solving, and personal-social) was assessed using the Ages and Stages Questionnaires-Third Edition (ASQ-3). Descriptive statistical analysis was used. Results:(1) The median gestational age at prenatal diagnosis was 28.7 weeks (27.3-30.4 weeks), with 85.7% (18/21) of cases complicated by fetal hydrops, 90.5% (19/21) by polyhydramnios, and 85.7% (18/21) by bilateral pleural effusion. (2) The median gestational age at the first TAS was 30.9 weeks (29.7-32.7 weeks). Of the 21 cases, 10 required repeat stent placement due to dislodgement or blockage, with a total of 49 stent placements. The dislodgement rate within 7 days was 24.5% (12/49), and the blockage rate was 16.3% (8/49). The rate of premature rupture of membranes within one week post-stent placement was 9.5% (2/21), with an overall preterm premature rupture of membranes rate of 28.6% (6/21). The median interval from the first TAS to delivery was 30.0 d (19.8-40.0 d). Of the 21 cases, three opted for selective termination of pregnancy; the remaining 18 cases resulted in live births, with a median gestational age at delivery of 35.6 weeks (34.1-37.1 weeks), and three neonatal deaths. The overall neonatal survival rate was 15/18. Surviving infants were followed up to a median age of 30 months (7-48 months), with 13 showing normal development and two scoring below the ASQ-3 threshold.Conclusion:The improved double-J stent can be used for TAS in the treatment of fetal chylothorax, with generally favorable outcomes.
6.Automatic sleep staging model based on single channel electroencephalogram signal.
Haowei ZHANG ; Zhe XU ; Chengmei YUAN ; Caojun JI ; Ying LIU
Journal of Biomedical Engineering 2023;40(3):458-464
Sleep staging is the basis for solving sleep problems. There's an upper limit for the classification accuracy of sleep staging models based on single-channel electroencephalogram (EEG) data and features. To address this problem, this paper proposed an automatic sleep staging model that mixes deep convolutional neural network (DCNN) and bi-directional long short-term memory network (BiLSTM). The model used DCNN to automatically learn the time-frequency domain features of EEG signals, and used BiLSTM to extract the temporal features between the data, fully exploiting the feature information contained in the data to improve the accuracy of automatic sleep staging. At the same time, noise reduction techniques and adaptive synthetic sampling were used to reduce the impact of signal noise and unbalanced data sets on model performance. In this paper, experiments were conducted using the Sleep-European Data Format Database Expanded and the Shanghai Mental Health Center Sleep Database, and achieved an overall accuracy rate of 86.9% and 88.9% respectively. When compared with the basic network model, all the experimental results outperformed the basic network, further demonstrating the validity of this paper's model, which can provide a reference for the construction of a home sleep monitoring system based on single-channel EEG signals.
China
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Sleep Stages
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Sleep
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Electroencephalography
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Databases, Factual
7.The value of multiplex PCR method based on capillary electrophoresis in detecting common serotypes of respiratory adenovirus infection in children
Yue ZHANG ; Fangfang LYU ; Xiaohui JIA ; Zupan LIN ; Shunhang WEN ; Zhi XU ; Haowei ZHU ; Hailin ZHANG
Chinese Journal of Applied Clinical Pediatrics 2022;37(4):256-259
Objective:To establish a common method for detecting serotypes of respiratory adenovirus, and to detect the main serotypes of respiratory human adenovirus (HAdV) infection in children in Wenzhou area.Methods:A multiplex PCR method based on capillary electrophoresis was developed to detect 12 common serotypes of respiratory adenovirus.A total of 1 059 children with acute respiratory infection who were admitted to Yuying Children′s Hospital Affiliated to Wenzhou Medical University from January 2018 to December 2019 with positive infection of HAdV detected by the direct immunofluorescence method were recruited and retrospectively analyzed.Multiplex PCR was performed to determine 12 serotypes of respiratory adenovirus, including HAdV-1, 2, 3, 4, 5, 7, 14, 21, 37, 40, 41 and 55.Meanwhile, some samples were randomly selected to examine the consistency in the detection result by the first-generation sequencing method.Results:A total of 1 059 specimens of respiratory secretions with positive HAdV antigen were collected.Detected by multiplex PCR method, 947 cases (89.4%) were positive for 1 serotype, 13 cases (1.2%) were mixed infection with 2 serotypes, and 24 cases (2.3%) were negative.In addition, 75 cases(7.1%) were positive but could not be serotyped.Among the 947 children with the positive infection of a single serotype, 415 cases (43.8%) were HAdV-3 in subgroup B, 318 cases(33.6%) were HAdV-7, 12 cases (1.2%) were HAdV-55, 2 cases (0.2%) were HAdV-21, 108 cases (11.4%) were HAdV-2 in subgroup C, 70 cases (7.4%) were HAdV-1, 16 cases(1.7%) were HAdV-5, and 6 cases(0.6%) were HAdV-4 in subgroup E. HAdV-14, HAdV-37, HAdV-40 and HAdV-41 were not detected.A total of 51 positive samples of HAdV infection detected by multiplex PCR were randomly selected to compare with the detection result by the first-generation sequencing, which were all consistent.Conclusions:This study successfully established a multiplex PCR based on capillary electrophoresis in diagnosing common serotypes of respiratory adenovirus infection in children.HAdV-3, HAdV-7 of subgroup B and HAdV-2 and HAdV-1 of subgroup C were the main serotypes of respiratory adenovirus infection in children of Wenzhou area.HAdV-14, HAdV-37, HAdV-40 and HAdV- 41 were not detected.
8.Vibration Characteristics of Hollow Screws and Locking Plates for Treating Femoral Neck Fractures
Haowei ZHANG ; Xinsheng XU ; Ying LIU ; Shenghui WU ; Jiong MEI
Journal of Medical Biomechanics 2022;37(2):E244-E249
Objective To investigate the influence from natural and constrained modal of the hip joint on internal fixation after implantation of hollow screws and locking plates for treating femoral neck fractures. Methods CT image data of a patient with femoral neck fracture were analyzed, boundary of the hip joint was extracted to generate a three-dimensional (3D) model of the hip joint, and the assembly of common internal fixation models and hip joint models was established. Finite element simulation was then conducted, with focus on vibration characteristics. Results Vibration had a certain effect on internal fixation stability of hollow screws and locking plates. The occurrence of torsion would destroy the fixation environment of hollow screws and locking plates, resulting in a small displacement at the fracture end. In a constrained state, the modal frequency range was lower. Deformation of the vibration shape mostly occurred at proximal end of the femoral head, leading to the loosening phenomenon of internal fixation and prosthesis. A method for judging the stability of internal fixation was proposed from the perspective of vibration characteristics, and it was found that the stability of internal fixation with hollow screws was better than that of proximal locking plates. Conclusions For choosing internal fixation, influences from natural frequency of the screw and plate should be considered, so as to avoid natural frequency of the femur, which may cause resonance. The results can be used as a guidance for the selection of internal fixation materials and the design of structure and configuration.
9.Biomechanical analysis of Magic screw fixation for acetabular posterior column fracture.
Haowei ZHANG ; Zihuan XU ; Ying LIU ; Yongqin WANG ; Pengfei LI ; Hongmin CAI ; Ming NI
Journal of Biomedical Engineering 2022;39(4):672-678
This study aims to analyze the biomechanical stability of Magic screw in the treatment of acetabular posterior column fractures by finite element analysis. A three-dimensional finite element model of the pelvis was established based on the computed tomography (CT) and magnetic resonance imaging (MRI) data of a volunteer and its effectiveness was verified. Then, the posterior column fracture model of the acetabulum was generated. The biomechanical stability of the four internal fixation models was compared. The 500 N force was applied to the upper surface of the sacrum to simulate human gravity. The maximum implant stresses of retrograde screw fixation, single-plate fixation, double-plate fixation and Magic screw fixation model in standing and sitting position were as follows: 114.10, 113.40 MPa; 58.93, 55.72 MPa; 58.76, 47.47 MPa; and 24.36, 27.50 MPa, respectively. The maximum stresses at the fracture end were as follows: 72.71, 70.51 MPa; 48.18, 22.80 MPa; 52.38, 27.14 MPa; and 34.05, 30.78 MPa, respectively. The fracture end displacement of the retrograde tension screw fixation model was the largest in both states, and the Magic screw had the smallest displacement variation in the standing state, but it was significantly higher than the two plate fixations in the sitting state. Magic screw can satisfy the biomechanical stability of posterior column fracture. Compared with traditional fixations, Magic screw has the advantages of more uniform stress distribution and less stress, and should be recommended.
Biomechanical Phenomena
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Bone Plates
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Bone Screws
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Finite Element Analysis
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Fracture Fixation, Internal/methods*
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Fractures, Bone/surgery*
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Humans
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Spinal Fractures
10.Non-operative treatment for patients with acute uncomplicated appendicitis
Tong TIAN ; Xiaowei WANG ; Haowei LYU ; Shihong XU
Chinese Journal of General Practitioners 2016;15(8):632-635
Total 786 cases of acute uncomplicated appendicitis(UCAA) were included for analysis.All the cases were given antibiotics as a main treatment.Clinical cure rate and the number of cases requiring surgery were observed.Patients with conservative treatment were followed up and the recurrence was observed.Logistic regression was applied to analyze the risk factors of recurrence.Among 786 cases,774 (98.5%) were treated conservatively and achieved clinical cure;68 cases (9.0%) had recurrence during follow-up,the median time to recurrence was 11 months (1-33 months).Logistic regression analysis showed that age(OR =1.124,95% CI:1.067-3.790,x2 =2.767,P =0.041) and appendix bezoar (OR =1.649,95% CI:1.281-4.055,x2 =3.935,P =0.027) were independent risk factors for recurrence.Non-operative treatment for acute uncomplicated appendicitis shows a good short and long term effects.Surgical excision may be a better choice for the patients with high risks of recurrence.


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