1.Clinical and Mechanism of Modified Xiaoyaosan and Its Effective Components in Treatment of Thyroid Diseases: A Review
Shanshan LI ; Yu FU ; Dandan WEI ; Fei WANG ; Mengjiao XU ; Ting WANG ; Shuxun YAN
Chinese Journal of Experimental Traditional Medical Formulae 2025;31(6):302-310
Thyroid diseases are common clinical endocrine disorders, and their pathogenesis is generally considered to be closely related to genetic predisposition factors, immune system disorders, hormone levels, etc. Xiaoyaosan is widely used in the treatment of various thyroid diseases with excellent effects. This study summarized the relevant literature on the treatment of thyroid diseases with modified Xiaoyaosan prescriptions and their active ingredients from aspects such as theoretical analysis, clinical research, and mechanism research. Theoretical analysis revealed that Xiaoyaosan could not only disperse stagnated liver qi but also replenish deficient spleen Qi, which was consistent with the etiology and pathogenesis of thyroid diseases. Clinical studies found that Xiaoyaosan and its modified prescriptions could be widely used in the treatment of multiple thyroid diseases, such as hyperthyroidism, Hashimoto's thyroiditis, and thyroid nodules. Both the use of modified Xiaoyaosan alone and in combination with medications such as methimazole, propylthiouracil, and euthyrox could effectively improve patients' clinical symptoms. In the mechanism research, this study discovered that the whole formula of Xiaoyaosan and its modified prescriptions could inhibit inflammatory reactions, regulate immune balance, and delay liver damage during the treatment of thyroid diseases. The research on Xiaoyaosan for treating thyroid diseases mainly focused on thyroid cancer, autoimmune thyroiditis, hyperthyroidism, and hypothyroidism. The mechanisms of action mainly involved promoting cell apoptosis, inhibiting cell proliferation and migration, arresting the cell cycle, and regulating thyroid hormone levels. In conclusion, this study systematically combs and summarizes the research status of Xiaoyaosan in treating thyroid diseases through literature retrieval, aiming to provide new perspectives and new ideas for the prevention and treatment of thyroid diseases with traditional Chinese medicine.
2.Associations between statins and all-cause mortality and cardiovascular events among peritoneal dialysis patients: A multi-center large-scale cohort study.
Shuang GAO ; Lei NAN ; Xinqiu LI ; Shaomei LI ; Huaying PEI ; Jinghong ZHAO ; Ying ZHANG ; Zibo XIONG ; Yumei LIAO ; Ying LI ; Qiongzhen LIN ; Wenbo HU ; Yulin LI ; Liping DUAN ; Zhaoxia ZHENG ; Gang FU ; Shanshan GUO ; Beiru ZHANG ; Rui YU ; Fuyun SUN ; Xiaoying MA ; Li HAO ; Guiling LIU ; Zhanzheng ZHAO ; Jing XIAO ; Yulan SHEN ; Yong ZHANG ; Xuanyi DU ; Tianrong JI ; Yingli YUE ; Shanshan CHEN ; Zhigang MA ; Yingping LI ; Li ZUO ; Huiping ZHAO ; Xianchao ZHANG ; Xuejian WANG ; Yirong LIU ; Xinying GAO ; Xiaoli CHEN ; Hongyi LI ; Shutong DU ; Cui ZHAO ; Zhonggao XU ; Li ZHANG ; Hongyu CHEN ; Li LI ; Lihua WANG ; Yan YAN ; Yingchun MA ; Yuanyuan WEI ; Jingwei ZHOU ; Yan LI ; Caili WANG ; Jie DONG
Chinese Medical Journal 2025;138(21):2856-2858
3.Comparison of clinical characteristics and prognostic influence factors between patients with or without hypertrophic cardiomyopathy complicated by microvascular dysfunction
Chuwen WU ; Mengling PENG ; Yu FU ; Shanshan ZHOU
Journal of Jilin University(Medicine Edition) 2025;51(6):1630-1637
Objective:To discuss the clinical characteristics of the patients with hypertrophic cardiomyopathy(HCM)complicated with microcirculatory dysfunction(CMD),and to analyze the impact of concurrent CMD on the prognosis of the HCM patients.Methods:A total of 211 patients diagnosed with HCM and having complete cardiac magnetic resonance imaging(CMR)examination results from January 1,2019 to September 30,2023 were collected.They were divided into HCM complicated with CMD group(68 cases)and HCM complicated without CMD group(143 cases)based on CMR assessment.The clinical data such as age,gender,admission symptoms,and past medical history,blood test data such as troponin,electrocardiogram,echocardiography,and CMR data including abnormal Q wave,ST segment depression,inverted T wave,PR interval,QRS wavelength,corrected QT interval,ejection fraction(EF),left atrial diameter(LAD),left and right ventricular end-diastolic diameters,cardiac output,E peak,A peak,and maximum wall thickness(MWT)of the patients were compared between two groups.Logistic regression was used to analyze the clinical characteristics of the HCM patients complicated with CMD;multivariate modified Poisson regression was used to analyze the risk factors for major adverse cardiovascular events(MACE)in the HCM patients.Results:Compared with HCM complicated without CMD group,the percentage of palpitation patients in HCM complicated with CMD group was significantly increased(P<0.05),the percentage of tachycardia episode patients was significantly increased(P<0.05),the troponin level was significantly increased(P<0.05),and the percentage with a history of hypertension patients was significantly decreased(P<0.05).Compared with HCM complicated without CMD group,the percentage of abnormal Q wave on electrocardiogram in the patients in HCM complicated with CMD group were significantly increased(P<0.05),the percentage of inverted T wave and the EF of the patients was significantly decreased(P<0.05),the LAD was significantly increased(P<0.05),and the MWT was significantly increased(P<0.05).The multivariate Logistic regression analysis results showed that increased LAD(OR=1.05,95%CI:1.00-1.11,P=0.048)and increased MWT(OR=1.11,95%CI:1.03-1.19,P=0.007)were the risk factors for concurrent CMD in the HCM patients;history of hypertension(OR=0.40,95%CI:0.20-0.80,P=0.010)was a protective factor for concurrent CMD in the HCM patients.The average follow-up time in this study was 20.5 months.A total of 27 patients experienced MACE,with an overall incidence of 12.80%,including 12 patients in HCM complicated with CMD group and 15 patients in HCM complicated without CMD group.The multivariate modified Poisson regression analysis results showed that history of diabetes(RR=2.34,95%CI:1.09-5.06,P=0.030),history of arrhythmia(RR)=4.00,95%CI:1.82-8.83,P=0.001),and decreased ejection fraction(RR=0.96,95%CI:0.94-0.99,P=0.001)were risk factors for MACE in the HCM patients.Conclusion:The HCM patients complicated with CMD have unique clinical characteristics,including higher symptom burden,left atrial enlargement,myocardial hypertrophy,and increased troponin levels.Concurrent CMD does not increase the short-term risk of adverse events;diabetes,arrhythmia,and decreased EF are key risk factors for prognosis;early intervention and complication management for HCM complicated with CMD patients may improve the long-term prognosis of the HCM patients.
4.Regulation of natural killer cell subtypes and functions by programmed cell death protein 1 and its receptor at the maternal-fetal interface in mice infected with Toxoplasma gondii during the second trimester
Jiayue SUN ; Qiuhua BAI ; Xiaodan CHEN ; Jiayin LÜ ; Shanshan HE ; Lili TANG ; Dejun LIAO ; Dengyu LIU ; Xiaoyin FU
Chinese Journal of Schistosomiasis Control 2025;37(5):465-474
Objective To investigate the regulatory role of the programmed cell death protein 1 (PD-1) and its ligand programmed cell death protein ligand 1 (PD-L1) signaling on the subtypes and functions of natural killer (NK) cells at the maternal-fetal interface during the second trimester in mice following Toxoplasma gondii infection during the first trimester. Methods Twelve 6- to 8-week-old female mice of the C57BL/6J strain were divided into a control group and an infection group, of 6 mice in each group. On the 6.5th day of pregnancy (Gd6.5), each pregnant mouse in the infection group was intraperitoneally injected with 150 tachyzoites of the Toxoplasma gondii PRU strain, while mice in the control group were injected with an equal volume of physiological saline. On the 12.5th day of pregnancy (Gd12.5), uterus and placenta tissues were sampled from pregnant mice for pathological observations, and the mRNA expression levels of PD-1, PD-L1, and tumor necrosis factor-α (TNF-α) were quantified in uterus and placenta tissues. The PD-1 and DX5 expression was measured on NK cells at the maternal-fetal interface using flow cytometry. In addition, the in vitro JEG-3 trophoblast cells and NK-92MI cells co-culture system was established as the control group, and the addition of T. gondii tachyzoites in the co-culture system served as the infection group. The PD-1, PD-L1, and DX5 mRNA expression was quantified in cells using real-time fluorescence quantitative reverse transcription PCR (RT-qPCR) assay, and the TNF-α concentration was measured in the cell culture supernatant using enzyme-linked immunosorbent assay (ELISA). Results On Gd12.5, clear and intact cellular structures of placental decidual tissues were seen in pregnant mice in the control group, with no remarkable abnormal changes found in the uterine columnar epithelial cells, and inflammatory cell infiltration and blood stasis at varying degrees were found in uterine and placental tissues from pregnant mice in the infection group. The relative PD-1, PD-L1, and TNF-α mRNA expression was (1.004 ± 0.004), (1.001 ± 0.001), and (1.001 ± 0.001) in uterine tissues from pregnant mice in the control group and (2.480 ± 0.720), (3.355 ± 0.920), and (2.391 ± 0.073) in the infection group, respectively. The relative PD-1, PD-L1, and TNF-α mRNA expression was (1.007 ± 0.010), (1.006 ± 0.006), and (1.001 ± 0.001) in the uterine tissues in the control group and (6.948 ± 1.918), (3.225 ± 1.034), and (1.536 ± 0.150) in the infection group, respectively. The relative PD-1, PD-L1, and TNF-α mRNA expression was higher in both the uterine (t = 3.55, 4.43 and 33.02, all P values < 0.05) and placental tissues (t = 5.36, 3.72 and 6.18, all P values < 0.05) in the infection group than in the control group. Flow cytometry showed that the proportions of PD-1+ NK cells, PD-1+ DX5+ NK cells, and DX5+ NK cells were (12.200 ± 1.082)%, (9.373 ± 7.728)%, and (44.000 ± 4.095)% in uterine tissues from pregnant mice in the control group, and (21.733 ± 1.630)%, (18.767 ± 1.242)%, and (73.367 ± 0.611)% in the infection group, respectively. The proportions of PD-1+ NK cells, PD-1+ DX5+ NK cells, and DX5+ NK cells were (1.100 ± 0.510)%, (2.277 ± 1.337)%, and (96.167 ± 2.831)% in placental tissues from mice in the control group, and (26.867 ± 9.722)%, (23.433 ± 6.983)%, and (82.467 ± 2.248)% in the infection group, respectively. The proportions of PD-1+ NK cells (t = 8.45, P < 0.05) and DX5+ NK cells (t = 12.29, P < 0.05) were higher in uterine tissues from pregnant mice in the infection group than in the control group, and no significant difference was seen in the proportion of PD-1+ DX5+ NK cells (Z = -1.09, P > 0.05). The proportions of PD-1+ NK cells (t = 4.58, P < 0.05) and PD-1+ DX5+ NK cells (t = 5.15, P < 0.05) were higher in placental tissues from pregnant mice in the infection group than in the control group, while the proportion of DX5+ NK cells was lower in the infection group than in the control group (t = -6.56, P < 0.05). RT-qPCR assay revealed that the relative PD-1, PD-L1, and DX5 mRNA expression was (1.010 ± 0.005), (1.002 ± 0.003), and (1.001 ± 0.001) in the JEG-3 cells and NK92MI cells co-culture system and (3.638 ± 1.258), (0.397 ± 0.158), and (4.267 ± 1.750) in the control group, and ELISA measured that the TNF-α concentration was higher in the cell culture supernatant in the infection group [(22.056 ± 3.205) pg/mL] than in the control group [(12.441 ± 0.001) pg/mL] (t = 5.20, P < 0.05). The PD-1(t = 3.62, P < 0.05) and DX5 mRNA expression (t = 3.23, P < 0.05) was higher in the infection group than in the control group, and the PD-L1 mRNA expression was lower in the infection group than in the control group (t = -6.63, P < 0.05). Conclusions Following T. gondii infection, both PD-L1 expression and PD-1 expression on DX5+ NK cells at the maternal-fetal interface are upregulated in mice during the second trimester; however, the proportion of DX5+ NK cells decreases. These findings suggest that PD-1/PD-L1 signaling may suppress NK cell functions by modulating DX5+ NK cell subsets.
5.MR vessel wall imaging for predicting instability status of intracranial aneurysm
Xinmei MA ; Qichang FU ; Shanshan XIE ; Yong ZHANG ; Jingliang CHENG ; Sheng GUAN
Chinese Journal of Medical Imaging Technology 2025;41(1):15-19
Objective To observe the value of MR vessel wall imaging(VMI)for predicting instability status of intracranial aneurysm(IA).Methods MR angiography(MRA)and vascular wall imaging(VWI)data of 506 patients with single IA were retrospectively analyzed.Asymptomatic IA was included in stable status group(n=349),while those with enlargement during follow-up or threatened rupture symptoms were taken as instable status group(n=157).The patients were divided into training set(n=354)and validation set(n=152)at a ratio of 7:3.The least absolute shrinkage and selection operator(LASSO)and multivariate logistic regression were performed to screen risk factors associated with IA instability based on clinical data,MRA and VWI manifestations.Then model 1 was constructed based the above indexes,while model 2 was established based only on MRA manifestations of IA.The receiver operating characteristic curve was plotted,and the area under the curve(AUC)was calculated to evaluate the efficacy of each model for predicting IA instability.Results LASSO and multivariate logistic regression showed that female patient,age<50 years with history of cerebral infarction and IA wall enhancement on MRA were all independent predictors of IA instability status.The AUC of model 1 for predicting instability status of IA was 0.733 and 0.742 in training set and validation set,respectively,both higher than that of model 2(0.593 and 0.609,both P<0.05).Conclusion MR VWI was helpful for predicting IA instability status.
6.CT artificial intelligence assessment of pulmonary function in chronic obstructive pulmonary diseases
Haonan FU ; Shanshan ZHANG ; Minge ZHANG ; Zishan LIU ; Hai YANG
China Modern Doctor 2025;63(6):1-5,78
Objective To analyse correlation between automatic quantification of emphysema and lung function based on artificial intelligence(AI)model algorithm by chest computed tomography(CT)in patients with chronic obstructive pulmonary disease(COPD).Methods The clinical and imaging data of hospitalized COPD patients who received chest CT plain scan in Taizhou Hospital of Zhejiang Province,Enze Hospital of Taizhou Enze Medical Center(Group)from December 2020 to May 2021 were retrospectively collected,patients were classified into five levels of ventilator-function decline.By using the AI model,the extent of emphysema lesions in COPD patients were calculated,low-attenuation areas below-950HU were identified and their low attenuation area percentage(LAA%)were calculated.Combined with the output results of AI model and whether each variable met the characteristics of normal distribution,Pearson correlation coefficient between percentage of measured forced expiratory volume at the end of 1 second to estimated value(FEV1%)and LAA%of each lung lobe,and the Spearman correlation coefficient between FEV1 as a percentage of forced vital capacity(FEV1/FVC)and LAA%of each lung lobe in patients with different COPD grades were calculated respectively.Results There was a negative correlation between total lung LAA%and FEV1/FVC in moderate COPD(r=-0.632,P=0.001).Total lung LAA%in very severe COPD was negatively correlated with both FEV1/FVC and FEV1%(r=-0.562,P=0.045 and r=-0.701,P=0.004).The results of lung segment analysis showed that LAA%of the left upper lung lobe was more strongly correlated with pulmonary function indicators in extremely severe COPD(r=-0.650,P=0.016 andr=-0.731,P=0.002).The correlation between left inferior lobe LAA%and FEV1/FVC was stronger correlation in patients with moderate COPD(r=-0.712,P=0.000).In smoking patients,LAA%was moderate correlated with FEV1(r=-0.534,P=0.006),and LAA%was moderate correlated with FEV1/FVC(r=-0.564,P=0.003).Conclusion AI-based emphysema quantification results have a good correlation with FEV1/FVC and FEV1%,which can provide strong support for the diagnosis and classification of COPD based on CT plain scan images.
7.Construction and application of a postoperative resistance exercise program for gastric cancer patients
Shanshan WANG ; Wanying WU ; Guanmian LIANG ; Huanying FU ; Jiaoyu GE
Chinese Journal of Nursing 2025;60(13):1573-1580
Objective To construct a postoperative resistance exercise program for patients with gastric cancer,and to explore its intervention effect on symptom clusters and quality of life.Methods Based on the interactive attainment theory,the resistance exercise program was constructed through literature analysis and expert meeting method,and the feasibility of the program was confirmed through pre-experiments.The patients undergoing radical gastrectomy in the Department of Gastric Surgery of a tertiary hospital in Zhejiang province were selected as the study subjects by convenience sampling method,with 36 patients from November to December 2023 as the control group and 36 patients from January to March 2024 as the experimental group,and the intervention continued for 7 days.The experimental group received a resistance exercise program on the basis of conventional rapid recovery surgical care,and the control group received routine rapid recovery surgical care.On the first day before surgery,the 3rd postoperative day,and the 7th postoperative day,the Anderson Symptom Assessment Scale-Gastrointestinal Tumor-Specific Module Scale and the Functional Assessment of Cancer Therapy-General were used for evaluation.Results During the application of the program,a case was excluded from the experimental group,and a case was excluded from the control group.Ultimately,70 patients were included.The results of generalized estimating equation showed that there was an interaction effect between the 2 groups in the surgery-related symptom cluster and the energy deficiency symptom cluster(P<0.05).Simple effect analysis showed that on the 7th day after surgery,the scores of the surgery-related symptom cluster in the experimental group and the control group were 3(1,5)and 5(3,9)respectively,and the scores of the energy deficiency symptom cluster were 6(8,18)and 14(8,19)respectively,with statistically significant differences(P<0.05).The quality of life scores of the experimental group and the control group were(82.06±9.89)and(73.86±13.08)respectively,with statistically significant differences(P=0.004).No adverse events occurred in either group.Conclusion The resistance exercise program is scientific,safe and feasible,which can improve the surgery-related symptoms and energy deficiency symptoms,and improve the quality of life of patients with gastric cancer after surgery.
8.Study on the Mating Degree between Diagnosis and Treatment Items for Cerebral Ischemic Diseases and Clinical Pathways under DRG Payment
Shanshan DAI ; Guangying GAO ; Yinghong FU
Chinese Hospital Management 2025;45(2):35-39
Objective Taking cerebral ischemic disease as an example,it explores the use of doctors'actual diagnosis and treatment items under DRG payment,and analyzes the matching degree between actual diagnosis and treatment items and clinical pathways.Methods Based on the actual diagnosis and treatment items for patients with cerebral ischemic diseases,it sorted out their usage and cost proportion,built a diagnosis and treatment item pool,determined the basic diagnosis and treatment items based on expert consultation,and compared and matched them with clinical pathways.Results Among all the diagnosis and treatment items of cerebral ischemic diseases,only 21.27%had a utilization rate of more than 10%,but the cost accounted for 82.96%.42 diagnosis and treatment items were screened as basic diagnosis and treatment items.The degree of matching between laboratory inspection items and clinical pathways was high,but there were certain differences in drug treatment.Conclusion There are certain differences between actual diagnosis and treatment items and clinical pathways of cerebral ischemic diseases,and there are a large number of low-utilization items,some high-utilization items are not basic diagnosis and treatment items,and most of them are concentrated in laboratory inspection items.It is recommended to enhance the attention of clinical pathway under DRG payment and update and optimize it regularly,improve doctors'awareness of diagnosis and treatment based on clinical pathways,and improve the supervision and assessment mechanism of doctors'diagnosis and treatment behaviors,regularly update and optimize clinical pathways to improve their operability.
9.Evaluation value of C-reactive protein/albumin ratio combined with platelet count and Glasgow coma scale for prognosis of patients with heat stroke.
Shanshan SHI ; Zhengzhen WU ; Yong HUANG ; Xianglei FU
Chinese Critical Care Medicine 2025;37(2):160-164
OBJECTIVE:
To explore the prognostic value of C-reactive protein (CRP)/albumin (Alb) ratio combined with platelet count (PLT) and Glasgow coma score (GCS) in patients with heat stroke (HS).
METHODS:
A retrospective analysis was conducted on the clinical data of HS patients admitted to the department of intensive care unit (ICU) of Nanchong Central Hospital from May 1, 2020 to October 31, 2023. This included general information, admission GCS, laboratory indicators and 28-day prognosis. The differences in the above indicators were compared between two groups of patients with different prognoses. Statistically significant indicators from univariate analysis were included in multivariate Logistic regression analysis to screen for factors influencing 28-day mortality in HS patients. The predictive value of various influencing factors on the 28 days prognosis of HS patients were analyzed by receiver operator characteristic curve (ROC curve).
RESULTS:
A total of 73 HS patients were included, of whom 41 survived for 28-day and 32 died. There were no statistically significant differences in gender and age between the two groups of HS patients with different prognoses. The white blood cell count (WBC), neutrophil count (NEU), aspartate aminotransferase (AST), alanine aminotransferase (ALT), CRP, and CRP/Alb ratio in the death group were significantly higher than those of the survival group, and the admission GCS score, platelet count (PLT), total bilirubin (TBil) and Alb were significantly lower than the survival group [WBC (×109/L): 14.80 (11.44, 17.15) vs. 11.96 (9.47, 14.82), NEU (×109/L): 13.05 (8.56, 15.67) vs. 9.50 (6.68, 12.09), AST (U/L): 108.00 (52.70, 291.50) vs. 64.50 (38.25, 110.50), ALT (U/L): 62.00 (19.50, 159.00) vs. 34.50 (20.75, 70.75), CRP (mg/L): 22.49 (3.42, 58.93) vs. 3.68 (1.01, 11.46), CRP/Alb ratio: 0.53 (0.08, 1.77) vs. 0.08 (0.02, 0.44), GCS score: 7.0 (5.0, 8.0) vs. 8.5 (7.0, 11.0), PLT (×109/L): 107.00 (73.50, 126.00) vs. 131.50 (107.50, 176.25), TBil (mmol/L): 15.60 (10.00, 25.30) vs. 21.40 (14.80, 30.05), Alb (g/L): 32.65 (32.53, 49.30) vs. 38.70 (36.20, 40.40), all P < 0.05]. Binary Logistic regression analysis showed that the GCS score [odds ratio (OR) = 0.686, 95% confidence interval (95%CI) was 0.491-0.959, P = 0.028], PLT (OR = 0.973, 95%CI was 0.954-0.992, P = 0.005), NEU (OR = 1.312, 95%CI was 1.072-1.606, P = 0.009) and CRP/Alb ratio (OR = 7.652, 95%CI was 1.632-35.881, P = 0.010) were independent influencing factors for 28-day mortality in HS patients. ROC curve analysis showed that the area under the curve (AUC) of GCS score, PLT, and CRP/Alb ratio for single prediction of 28-day prognosis in HS patients was 0.705, 0.752, and 0.729, and the combination of all three predicted the highest AUC of 28-day prognosis in HS patients (0.917), with a sensitivity and specificity of 86.2% and 81.2%, respectively.
CONCLUSION
CRP/Alb ratio, PLT, and GCS score are independent influencing factors affecting the prognosis of HS patients, and all of them have a certain predictive value for the prognosis of HS patients, in which the combination of the three has a higher predictive value for the prognosis of HS patients.
Humans
;
C-Reactive Protein/analysis*
;
Prognosis
;
Glasgow Coma Scale
;
Retrospective Studies
;
Heat Stroke/diagnosis*
;
Platelet Count
;
Male
;
Female
;
Serum Albumin/analysis*
;
Middle Aged
;
Aged
;
Adult
;
ROC Curve
10.Cloning and functional analysis of GmMAX2b involved in disease resistance.
Jiahui FU ; Lin ZUO ; Weiqun HUANG ; Song SUN ; Liangyu GUO ; Min HU ; Peilan LU ; Shanshan LIN ; Kangjing LIANG ; Xinli SUN ; Qi JIA
Chinese Journal of Biotechnology 2025;41(7):2803-2817
The plant F-box protein more axillary growth 2 (MAX2) is a key factor in the signal transduction of strigolactones (SLs) and karrinkins (KARs). As the main component of the SKP1-CUL1-FBX (SCF) complex ubiquitin ligase E3, MAX2 is responsible for specifically recognizing the target proteins, suppressor of MAX2 1/SMAX1-like proteins (SMAX1/SMXLs), which would be degraded after ubiquitination. It can thereby regulate plant morphogenesis and stress responses. There exist homologous genes of MAX2 in the important grain and oil crop soybean (Glycine max). However, its role in plant defense responses has not been investigated yet. Here, GmMAX2b, a homologous gene of MAX2, was successfully cloned from stressed soybean. Bioinformatics analysis revealed that there were two MAX2 homologous genes, GmMAX2a and GmMAX2b, with a similarity of 96.2% in soybean. Their F-box regions were highly conserved. The sequence alignment and cluster analysis of plant MAX2 homologous proteins basically reflected the evolutionary relationship of plants and also suggested that soybean MAX2 might be a multifunctional protein. Expression analysis showed that plant pathogen infection and salicylic acid treatment induced the expression of GmMAX2b in soybean, which is consistent with that of MAX2 in Arabidopsis. Ectopic expression of GmMAX2b compensated for the susceptibility of Arabidopsis max2-2 mutant to pathogen, indicating that GmMAX2b positively regulated plant disease resistance. In addition, yeast two hybrid technology was used to explore the potential target proteins of GmMAX2b. The results showed that GmMAX2b interacted with SMXL6 and weakly interacted with SMXL2. In summary, GmMAX2b is a positive regulator in plant defense responses, and its expression is induced by pathogen infection and salicylic acid treatment. GmMAX2b might exert its effect through interaction with SMXL6 and SMXL2. This study expands the theoretical exploration of soybean disease resistant F-box and provides a scientific basis for future soybean disease resistant breeding.
Glycine max/metabolism*
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Disease Resistance/genetics*
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Plant Diseases/immunology*
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Plant Proteins/genetics*
;
Cloning, Molecular
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Gene Expression Regulation, Plant
;
F-Box Proteins/genetics*
;
Arabidopsis/genetics*
;
Phylogeny

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