1.Application of rehabilitation therapy techniques for post-stroke dysphagia: a bibliometric analysis
Ping LIU ; Nan ZHOU ; Xiaojie XUE ; Weibo SHAO
Chinese Journal of Rehabilitation Theory and Practice 2026;32(3):294-303
ObjectiveTo analyze the current status, hotspot and development trends of rehabilitation technologies for post-stroke dysphagia (PSD). MethodsLiteratures related to rehabilitation technologies for PSD were retrieved from CNKI, VIP and Web of Science Core Collection from inception to July, 2025. Visualization analysis was conducted using CiteSpace 6.3.R1 and VOSviewer 1.2.20. ResultsA total of 1 265 articles were included, consisting of 794 Chinese and 471 English publications. The annual volume of Chinese literature peaked in 2019 (74 articles) and English literature peaked in 2022 (61 articles). Research hotspots included low-frequency surface neuromuscular electrical stimulation, repetitive transcranial magnetic stimulation, surface electromyography biofeedback and transcranial direct current stimulation. Keyword clustering and timeline analysis indicated that researches evolved from early traditional rehabilitation methods to the diversified and integrated application of combined rehabilitation technologies. ConclusionResearch on rehabilitation technologies for PSD is developing rapidly. Future efforts should focus on researches of multi-technology integration, individualized treatment protocols and long-term efficacy assessments.
2.Application of rehabilitation therapy techniques for post-stroke dysphagia: a bibliometric analysis
Ping LIU ; Nan ZHOU ; Xiaojie XUE ; Weibo SHAO
Chinese Journal of Rehabilitation Theory and Practice 2026;32(3):294-303
ObjectiveTo analyze the current status, hotspot and development trends of rehabilitation technologies for post-stroke dysphagia (PSD). MethodsLiteratures related to rehabilitation technologies for PSD were retrieved from CNKI, VIP and Web of Science Core Collection from inception to July, 2025. Visualization analysis was conducted using CiteSpace 6.3.R1 and VOSviewer 1.2.20. ResultsA total of 1 265 articles were included, consisting of 794 Chinese and 471 English publications. The annual volume of Chinese literature peaked in 2019 (74 articles) and English literature peaked in 2022 (61 articles). Research hotspots included low-frequency surface neuromuscular electrical stimulation, repetitive transcranial magnetic stimulation, surface electromyography biofeedback and transcranial direct current stimulation. Keyword clustering and timeline analysis indicated that researches evolved from early traditional rehabilitation methods to the diversified and integrated application of combined rehabilitation technologies. ConclusionResearch on rehabilitation technologies for PSD is developing rapidly. Future efforts should focus on researches of multi-technology integration, individualized treatment protocols and long-term efficacy assessments.
3.Application of rehabilitation therapy techniques for post-stroke dysphagia: a bibliometric analysis
Ping LIU ; Nan ZHOU ; Xiaojie XUE ; Weibo SHAO
Chinese Journal of Rehabilitation Theory and Practice 2026;32(3):294-303
ObjectiveTo analyze the current status, hotspot and development trends of rehabilitation technologies for post-stroke dysphagia (PSD). MethodsLiteratures related to rehabilitation technologies for PSD were retrieved from CNKI, VIP and Web of Science Core Collection from inception to July, 2025. Visualization analysis was conducted using CiteSpace 6.3.R1 and VOSviewer 1.2.20. ResultsA total of 1 265 articles were included, consisting of 794 Chinese and 471 English publications. The annual volume of Chinese literature peaked in 2019 (74 articles) and English literature peaked in 2022 (61 articles). Research hotspots included low-frequency surface neuromuscular electrical stimulation, repetitive transcranial magnetic stimulation, surface electromyography biofeedback and transcranial direct current stimulation. Keyword clustering and timeline analysis indicated that researches evolved from early traditional rehabilitation methods to the diversified and integrated application of combined rehabilitation technologies. ConclusionResearch on rehabilitation technologies for PSD is developing rapidly. Future efforts should focus on researches of multi-technology integration, individualized treatment protocols and long-term efficacy assessments.
4.Construction of Mouse Models of Psoriasis-like Lesions Induced by Cold Exposure Combined with Imiquimod and Evaluation of Therapeutic Efficacy of Kaixuan Jiedu Core Prescription
Meiqi SUN ; Xue XIAO ; Jiarong WU ; Jiaqi LI ; Ningxin ZHANG ; Mengyao JIANG ; Huan LIU ; Bin YANG ; Ping SONG
Chinese Journal of Experimental Traditional Medical Formulae 2026;32(19):69-78
ObjectiveTo establish the mouse models of psoriasis-like lesions induced by continuous cold exposure or intermittent cold exposure combined with imiquimod (IMQ), and to evaluate the interventional effects of Kaixuan Jiedu core prescription (KXJD) on the two models. MethodsMale C57BL/6J mice were selected and classified into two experimental batches. The first batch of 36 mice was randomized into a room temperature group, a continuous cold exposure (10 ℃/24 h) group, and an intermittent cold exposure (10 ℃/6 h) group. Each group was further divided into a normal subgroup and a model subgroup (topical application of IMQ to induce skin lesions), with 6 mice in each subgroup, for modeling and evaluation. The second batch of 54 mice, with 6 in each group, were subjected to the same temperature grouping with an additional KXJD (30.42 g·kg-1, continuous gavage for 5 days) group. Comprehensive evaluation of model characteristics and KXJD efficacy was conducted through Psoriasis Area and Severity Index (PASI) scoring, skin temperature measurement by infrared thermography, histopathological observation by hematoxylin-eosin (HE) staining, detection of vascular endothelial growth factor (VEGF) and platelet endothelial cell adhesion molecule 1 (CD31) by immunohistochemistry, detection of Claudin-1 and Occludin by immunofluorescence assay, determination of serum levels of tumor necrosis factor-α (TNF-α) and interleukin (IL)-10 by enzyme-linked immunosorbent assay (ELISA), and quantification of mRNA levels of IL-17A, IL-23, IL-6, and chemokine ligand 20 (CCL20) in skin lesions by quantitative Real-time polymerase chain reaction (Real-time PCR). ResultsModel mice in all temperature groups exhibited typical psoriasis-like skin lesions. Compared with the normal groups, the model groups showed increased PASI scores, decreased skin temperatures (P<0.05), obvious epidermal thickening, parakeratosis, and dermal inflammatory cell infiltration, as well as elevated mRNA levels of IL-17A, IL-23, IL-6, and CCL20 (P<0.05). Cold exposure further aggravated psoriasis. The total PASI score of the intermittent cold exposure model group was higher than that of the room temperature model group (P<0.05). The serum IL-10 did not show a compensatory elevation, and the blood vessels presented a characteristic of elevated CD31 expression (P<0.05) without a synchronous increase in VEGF. The continuous cold exposure model group exhibited more significant dermal capillary tortuosity and dilation, with the highest mRNA levels of IL-17A, IL-23, IL-6, and CCL20 among all groups. Compared with the respective model groups, KXJD intervention alleviated skin lesions, reduced epidermal thickness and inflammatory cell infiltration, and increased skin temperature, with the temperature increase being particularly significant in the intermittent cold exposure+KXJD group (P<0.05). Furthermore, KXJD down-regulated the expression of VEGF and CD31, restored the expression of Claudin-1 and Occludin, decreased the mRNA levels of IL-17A and IL-23 (P<0.05), and reduced the serum TNF-α level. ConclusionThis study successfully established compound psoriasis-like mouse models induced by cold exposure combined with IMQ. It confirms that cold aggravates the severity of psoriasis by exacerbating the closure of Xuanfu (sweat pores), microcirculation disorders, and immune imbalance. Moreover, different cold exposure patterns have distinct mechanism differences. Continuous cold exposure focuses on enhancing the inflammatory response via the IL-23/IL-17 axis and angiogenesis, simulating chronic aggravation under a long-term cold environment. Intermittent cold exposure tends to impair immune regulation and induce microvascular endothelial stress, corresponding to acute exacerbations caused by sudden temperature drops. KXJD can effectively alleviate psoriasis-like skin lesions under cold conditions by unblocking Xuanfu, regulating vasomotor function, and correcting abnormal immune-inflammatory responses.
5.Kaixuan Jiedu Core Prescription Alleviates Psoriatic Skin Lesions in Mice by Modulating Cold-sensitive TRPM8 Neuron-derived Signaling
Xue XIAO ; Bin YANG ; Meiqi SUN ; Haoruo YANG ; Ningxin ZHANG ; Jiaqi LI ; Huan LIU ; Mengyao JIANG ; Yuanyao SHE ; Ping SONG
Chinese Journal of Experimental Traditional Medical Formulae 2026;32(19):89-101
ObjectiveTo investigate the ameliorative effects of Kaixuan Jiedu core prescription (KXJD) on skin lesions in psoriasis-like mouse models under cold environment exposure, and to analyze its influences on transient receptor potential (TRP) channels and related neuroimmune regulatory factors. MethodsThirty-six C57BL/6J mice were randomized into 6 groups, with 6 mice in each group. Two feeding conditions were set: Normal temperature and cold [simulating a cold environment at (10±0.5) ℃, for 6 h daily]. Mice were induced to develop psoriasis-like lesions by applying imiquimod externally. The model mice were allocated into model groups and KXJD (30.42 g·kg-1, continuous gavage for 5 days) groups. Normal mice were used as the control group. Specifically, mice were allocated into normal temperature, normal temperature model, normal temperature+KXJD, cold exposure control, cold exposure model, and cold exposure+KXJD groups. The pathological changes in skin lesions were observed by hematoxylin-eosin (HE) staining. The expression of cluster of differentiation (CD) 3+ T lymphocytes, CD11c+ dendritic cells (DCs), phosphorylated extracellular signal-regulated kinase (p-ERK), and substance P (SP) were detected by immunofluorescence assay. The protein level of transient receptor potential cation channel subfamily M member 8 (TRPM8) in the skin tissue was determined by Western blot. The expression of TRPM8, transient receptor potential cation channel subfamily V member 1 (TRPV1), transient receptor potential cation channel subfamily A member 1 (TRPA1), and transient receptor potential cation channel subfamily V member 2 (TRPV2) at the protein and mRNA levels was determined by immunohistochemistry and Real-time PCR, respectively. The levels of calcitonin gene-related peptide (CGRP) and neuropeptide Y (NPY) in the serum were analyzed by enzyme-linked immunosorbent assay (ELISA). The enrichment analysis of differentially expressed genes (DEGs) and TRP pathway network construction were conducted based on the GEO database. The co-expression of TRPM8 and CGRP in the skin lesions was verified by immunofluorescence double labeling. ResultsBoth the normal temperature and cold exposure model groups showed typical psoriasis-like skin lesions. Compared with the normal temperature and cold exposure control groups, the model groups had excessive epidermal keratinization, thickened spinous layer, and inflammatory infiltration in the dermis, with increased pathological scores (P<0.05), increased infiltration of CD3+ and CD11c+ cells and expression of p-ERK and SP, upregulated mRNA levels of TRPM8, TRPA1, and TRPV2, downregulated mRNA level of TRPV1 (P<0.05), and reduced content of CGRP and increased content of NPY in the serum. Compared with the normal temperature and cold exposure model groups, KXJD reduced the pathological manifestations and pathological scores of psoriasis-like skin lesions (P<0.05), and inhibited the infiltration of CD3+ and CD11c+ cells and the expression of p-ERK and SP. Gene enrichment analysis suggested that the DEGs of psoriasis were significantly enriched in the interleukin (IL)-17 signaling pathway and TRP channel inflammatory regulation. Compared with the normal temperature and cold exposure model groups, KXJD reversed the abnormal mRNA levels of genes related to the TRP channel subfamilies (P<0.05), increased the CGRP level, and decreased the NPY level. Immunofluorescence double labeling further confirmed that compared with the model groups, KXJD down-regulated the co-expression of TRPM8 and CGRP in the skin lesions. ConclusionKXJD may ameliorate psoriasis-like skin lesions by downregulating the overexpressed cold-sensitive receptor TRPM8 in skin lesions and correcting the disorder of neuropeptide (such as SP and CGRP) release mediated by it, thereby inhibiting the IL-23/helper T cell 17 (Th17) core inflammatory pathway, suppressing the infiltration of inflammatory cells and the activation of the ERK signaling pathway, and regulating the Xuanfu (sweat pore)-TRPM8-neuroimmune response axis.
6.Mechanism of Kaixuan Jiedu Core Prescription in Ameliorating Psoriasis-like Inflammation via TrkA Receptor-mediated Regulation of CGRP Expression and Dendritic Cell Activation
Huan LIU ; Mengyao JIANG ; Jiaqi LI ; Meiqi SUN ; Xue XIAO ; Ningxin ZHANG ; Bin YANG ; Ping SONG
Chinese Journal of Experimental Traditional Medical Formulae 2026;32(19):102-110
ObjectiveTo investigate the ameliorative effects and mechanisms of Kaixuan Jiedu core prescription (KXJD) on neuroimmunological inflammation in imiquimod (IMQ)-induced psoriasis-like mice. MethodsA total of 24 C57BL/6J mice were randomly divided into four groups (n=6): Normal, model, KXJD, and tropomyosin receptor kinase A (TrkA) inhibitor GW441756 groups. The mice in the model, KXJD, and GW441756 groups were topically treated with 5% IMQ cream (62.5 mg·d-1) on the back to induce psoriasis-like inflammation. The KXJD group received KXJD by gavage (30.42 g·kg-1), the GW441756 group received intraperitoneal injection of GW441756 (10 mg·kg-1), and the normal and model groups received an equal volume of normal saline by gavage, with continuous intervention for 5 days. The severity of skin lesions was evaluated using the psoriasis area and severity index (PASI). Hematoxylin-eosin (HE) staining was used to measure epidermal thickness and observe pathological changes in the lesioned skin. Immunohistochemistry was employed to detect the expression of proliferating cell nuclear antigen (Ki67) and interleukin-17A (IL-17A) in the lesioned skin. Enzyme-linked immunosorbent assay (ELISA) was used to quantify the levels of interleukin-23 (IL-23) and calcitonin gene-related peptide (CGRP) in the lesioned tissues. Western blot was used to detect the expression of TrkA and phosphorylated TrkA (p-TrkA). Immunofluorescence assay was performed to detect the expression of TrkA receptor, protein gene product 9.5 (PGP9.5), cluster of differentiation 11c (CD11c), and CGRP in the lesions. Flow cytometry was used to detect the activation of splenic dendritic cells (DCs). ResultsCompared with the normal group, the model group exhibited typical psoriasis-like inflammation, characterized by erythema, infiltration and scaling, with histopathological findings of epidermal hyperkeratosis and acanthosis. The model group showed significantly increased expression of Ki67, IL-17A, IL-23 and p-TrkA (P<0.05, P<0.01), increased fluorescence intensity of CD11c, and significantly decreased CGRP expression (P<0.05). The splenic DC activation was significantly enhanced, as indicated by the increased mean fluorescence intensity (MFI) of CD86 (P<0.05). Compared with the model group, both the KXJD and GW441756 groups showed amelioration of the psoriasis-like skin inflammation, with significantly down-regulated expression of IL-17A, IL-23 and p-TrkA (P<0.05, P<0.01), significantly up-regulated expression of CGRP (P<0.01), reduced CD11c+ DC infiltration, and restored splenic DC activation balance (down-regulated CD86 MFI and up-regulated CD80 and CD40 MFI). Furthermore, the inhibitory effect of KXJD on Ki67 was significantly superior to that of the GW441756 group (P<0.01). ConclusionKXJD may alleviate IMQ-induced psoriasis-like inflammation in mice by targeting and inhibiting TrkA receptor phosphorylation, regulating CGRP expression in the lesions, and ameliorating aberrant activation of dendritic cells, while also significantly inhibiting keratinocyte proliferation.
7.Kaixuan Jiedu Core Prescription Ameliorates Imiquimod-induced Psoriasis-like Skin Lesions in Mice by Inhibiting Neuroinflammation Mediated by NGF-TrkA/TRPV1-PAR-2 Signaling Pathway
Mengyao JIANG ; Jiaqi LI ; Huan LIU ; Xue XIAO ; Ningxin ZHANG ; Bin YANG ; Ping SONG
Chinese Journal of Experimental Traditional Medical Formulae 2026;32(19):111-119
ObjectiveTo investigate the effects and molecular mechanisms of Kaixuan Jiedu core prescription (KXJD) on neuroinflammation and immuno-inflammation in the mouse model of imiquimod (IMQ)-induced psoriasis-like skin lesions by regulating the nerve growth factor (NGF)-tropomyosin receptor kinase A (TrkA)/transient receptor potential vanilloid 1 (TRPV1)-protease-activated receptor-2 (PAR-2) signaling pathway. MethodsA psoriasis-like skin lesion model was established in male C57BL/6J mice with IMQ. A total of 24 mice were randomized into four groups (n=6 per group): Blank control, model, methotrexate (MTX, 1 mg·kg-1), and KXJD (30.42 g·kg-1). Immunohistochemistry was employed to detect the expression of cluster of differentiation 3 (CD3), EGF-like module-containing mucin-like hormone receptor-like 1 (F4/80), lymphocyte antigen 6 complex locus G (Ly-6G), substance P (SP), calcitonin gene-related peptide (CGRP), NGF, phosphorylated TrkA (p-TrkA), phosphorylated TRPV1 (p-TRPV1), and PAR-2 in skin lesions. Serum levels of interleukin-17A (IL-17A) and interleukin-23 (IL-23) were measured by enzyme-linked immunosorbent assay (ELISA). Immunofluorescence assay and Western blot were employed to determine the expression of phosphorylated p38 mitogen-activated protein kinase (p-p38 MAPK) and phosphorylated nuclear factor-κB p65 (p-NF-κB p65). Reverse transcription quantitative polymerase chain reaction (Real-time PCR) was used to measure the mRNA levels of interleukin-1β (IL-1β), tumor necrosis factor (TNF), interleukin-6 (IL-6), and C-X-C motif chemokine ligand 1 (CXCL1) in skin lesions. Correlation analysis was performed. ResultsCompared with the blank control group, the model group showed increased positive areas of CD3+, F4/80+, and Ly-6G+ in skin lesions (P<0.05), elevated serum levels of IL-17A and IL-23 (P<0.05), increased positive areas of SP and CGRP in skin lesions (P<0.05), increased positive areas of NGF, p-TrkA, p-TRPV1, and PAR-2 (P<0.05), elevated ratios of p-p38 MAPK/p38 MAPK and p-NF-κB p65/NF-κB p65 (P<0.05), and upregulated mRNA levels of IL-1β, TNF, IL-6, and CXCL1 (P<0.05). Compared with those in the model group, all the above indicators were reversed in the KXJD group (P<0.05). MTX only downregulated the expression of p-TRPV1 and PAR-2 (P<0.05), with no significant effects on the expression of NGF, p-TrkA, or CGRP. ConclusionKXJD inhibits the NGF-TrkA/TRPV1-PAR-2 signaling pathway to reduce neuropeptide release and simultaneously downregulates the p38 MAPK/NF-κB signaling pathway and the expression of downstream pro-inflammatory factors to ameliorate psoriasis-like neuroinflammation and immuno-inflammation. The therapeutic effect of KXJD on psoriasis-like inflammation is closely associated with the inhibition of the NGF-TrkA/TRPV1-PAR-2 signaling pathway. This study provides experimental evidence for the modern interpretation of the Xuanfu theory.
8.A Fitting Method for Photoacoustic Pump-probe Imaging Based on Phase Correction
Zhuo-Jun XIE ; Hong-Wen ZHONG ; Run-Xiang LIU ; Bo WANG ; Ping XUE ; Bin HE
Progress in Biochemistry and Biophysics 2025;52(2):525-532
ObjectivePhotoacoustic pump-probe imaging can effectively eliminate the interference of blood background signal in traditional photoacoustic imaging, and realize the imaging of weak phosphorescence molecules and their triplet lifetimes in deep tissues. However, background differential noise in photoacoustic pump-probe imaging often leads to large fitting results of phosphorescent molecule concentration and triplet lifetime. Therefore, this paper proposes a novel triplet lifetime fitting method for photoacoustic pump-probe imaging. By extracting the phase of the triplet differential signal and the background noise, the fitting bias caused by the background noise can be effectively corrected. MethodsThe advantages and feasibility of the proposed algorithm are verified by numerical simulation, phantom and in vivo experiments, respectively. ResultsIn the numerical simulation, under the condition of noise intensity being 10% of the signal amplitude, the new method can optimize the fitting deviation from 48.5% to about 5%, and has a higher exclusion coefficient (0.88>0.79), which greatly improves the fitting accuracy. The high specificity imaging ability of photoacoustic pump imaging for phosphorescent molecules has been demonstrated by phantom experiments. In vivo experiments have verified the feasibility of the new fitting method proposed in this paper for fitting phosphoometric lifetime to monitor oxygen partial pressure content during photodynamic therapy of tumors in nude mice. ConclusionThis work will play an important role in promoting the application of photoacoustic pump-probe imaging in biomedicine.
9.Changing antimicrobial resistance profiles of Burkholderia cepacia in hospitals across China:results from CHINET Antimicrobial Resistance Surveillance Program,2015-2021
Chunyue GE ; Yunjian HU ; Xiaoman AI ; Yang YANG ; Fupin HU ; Demei ZHU ; Yingchun XU ; Xiaojiang ZHANG ; Hui LI ; Ping JI ; Yi XIE ; Mei KANG ; Chuanqing WANG ; Pan FU ; Yuanhong XU ; Ying HUANG ; Ziyong SUN ; Zhongju CHEN ; Yuxing NI ; Jingyong SUN ; Yunzhuo CHU ; Sufei TIAN ; Zhidong HU ; Jin LI ; Yunsong YU ; Jie LIN ; Bin SHAN ; Yan DU ; Sufang GUO ; Lianhua WEI ; Fengmei ZOU ; Hong ZHANG ; Chun WANG ; Chao ZHUO ; Danhong SU ; Dawen GUO ; Jinying ZHAO ; Hua YU ; Xiangning HUANG ; Wen'en LIU ; Yanming LI ; Yan JIN ; Chunhong SHAO ; Xuesong XU ; Chao YAN ; Shanmei WANG ; Yafei CHU ; Lixia ZHANG ; Juan MA ; Shuping ZHOU ; Yan ZHOU ; Lei ZHU ; Jinhua MENG ; Fang DONG ; Zhiyong LÜ ; Fangfang HU ; Han SHEN ; Wanqing ZHOU ; Wei JIA ; Gang LI ; Jinsong WU ; Yuemei LU ; Jihong LI ; Jinju DUAN ; Jianbang KANG ; Xiaobo MA ; Yanping ZHENG ; Ruyi GUO ; Yan ZHU ; Yunsheng CHEN ; Qing MENG ; Shifu WANG ; Xuefei HU ; Jilu SHEN ; Wenhui HUANG ; Ruizhong WANG ; Hua FANG ; Bixia YU ; Yong ZHAO ; Ping GONG ; Kaizhen WENG ; Yirong ZHANG ; Jiangshan LIU ; Longfeng LIAO ; Hongqin GU ; Lin JIANG ; Wen HE ; Shunhong XUE ; Jiao FENG ; Chunlei YUE
Chinese Journal of Infection and Chemotherapy 2025;25(5):557-562
Objective To examine the changing prevalence and antimicrobial resistance profiles of Burkholderia cepacia in 52 hospitals across China from 2015 to 2021.Methods A total of 9 261 strains of B.cepacia were collected from 52 hospitals between January 1,2015 and December 31,2021.Antimicrobial susceptibility of the strains was tested using Kirby-Bauer method or automated antimicrobial susceptibility testing systems according to a unified protocol.The results were interpreted according to the breakpoints released in the Clinical & Laboratory Standards Institute(CLSI)guidelines(2023 edition).Results A total of 9 261 strains of B.cepacia were isolated from all age groups,especially elderly patients.The proportion was 11.1%(1 032 strains)in children,significantly lower than the proportion in adults.About half(46.5%,4 310/9 261)of the strains were isolated from patients at least 60 years old and 42.3%(3 919/9 261)of the strains were isolated from young adults.Most isolates(71.1%)were isolated from sputum and respiratory secretions,followed by urine(10.7%)and blood samples(8.1%).B.cepacia isolates were highly susceptible to the five antimicrobial agents recommended in the CLSI M100 document(33rd edition,2023).B.cepacia isolates showed relatively higher resistance rates to meropenem and levofloxacin.However,the resistance rates to ceftazidime,trimethoprim-sulfamethoxazole,and minocycline remained below 8.1%.The percentage of B.cepacia strains resistant to levofloxacin was the highest compared to other antibiotics in any of the three age groups(from 12.4%in the patients<18 years old to 20.6%in the patients aged 60 years or older).Conclusions B.cepacia is one of the clinically important non-fermenting gram-negative bacteria.Accurate and timely reporting of antimicrobial susceptibility test results and ongoing antimicrobial resistance surveillance are helpful for rational prescription of antimicrobial agents and proper prevention and control of nosocomial infections.
10.Protective effect and mechanism of heat acclimation on hippocampus neuron injury in mice after exposure to electromagnetic field
Zeze WANG ; Xuesen YANG ; Ying WANG ; Yulong TAN ; Zhen LUO ; Ping LI ; Genlin HE ; Xiaoqian LIU ; Tingting SHEN ; Yishan LIU ; Xue LUO
Journal of Army Medical University 2025;47(7):629-638
Objective To investigate the protective effect and mechanism of heat acclimation(HA)on electromagnetic field(EMF)induced hippocampus neuron injury in mice.Methods Forty healthy BALB/c male mice(18~22 g,7 weeks old)were randomly divided into 4 groups(n=10):Control group(Con),HA group(34℃,30 d),EMF group(2 450 MHz,20 min/d,4 weeks)and HA+EMF group(HA preconditioning+EMF).Sucrose preference test was performed to evaluate sucrose preference levels of mice in each group.Tail suspension test and forced swimming test were utilized to observe the immobility time.Morris water maze test was conducted to determine the learning and memory capabilities.Pathological changes in the hippocampus were observed with HE staining.Immunohistochemical assay for Iba1(marker of microglia),CD68(marker of pro-inflammatory phenotype)and CD206(marker of anti-inflammatory phenotype)were used to detect the number and activation phenotype of microglia in the hippocampus.ELISA was applied to measure the levels of TNF-α,IL-1β,TGF-β and IL-10 in the hippocampus of each group.Western blotting was performed to determine the protein levels of HSP70 in the hippocampus.Results As compared with the Con group,the EMF group showed a decreased preference for sucrose(P<0.05),prolonged immobile time in the tail suspension test(P<0.01)as well as in the forced swimming test(P<0.01),extented escape latency on the 7th day(P<0.01),and a decreased time of crossing the platform(P<0.05).EMF exposure resulted in that the hippocampal neurons were in disordered arrangement,loose structure and irregular morphology,with swollen cytoplasm and condensed nuclei,swollen and more microglial cells in the hippocampus(P<0.01),and enhanced relative fluorescence intensity of CD68(P<0.01),but not in CD206 fluorescence intensity(P=0.885).All these findings suggested that activated microglia predominantly exhibited a pro-inflammatory M1 phenotype during this phase.In the hippocampus,the levels of TNF-α and IL-1β were significantly increased,while the levels of IL-10 and TGF-β were significantly decreased(P<0.01).HA treatment reversed the conditions induced by EMF exposure,including better preference for sucrose(P<0.01),shorten immobile time in tail suspension test(P<0.05)and forced swimming test(P<0.01),less escape latency on the 7th day(P<0.01),and improved hippocampal cell injuries.Compared with the Con group,there were more microglial cells in the hippocampus in the HA+EMF group,with increased relative fluorescence intensity of M2 phenotype marker CD206(P<0.01)and decreased CD68 fluorescence intensity(P<0.01).HA treatment also significantly decreased the expression of TNF-α and IL-1β levels(P<0.01),increased the expression of IL-10 and TGF-β(P<0.01),and elevated the protein level of HSP70(P<0.01)when compared with the EMF group.Conclusion HA may ameliorate EMF-induced hippocampus neurons injury in mice by altering the phenotype of activated microglia and inhibiting inflammatory responses.

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