1.Correlation between liver fibrosis degree and carotid plaque in patients with lean metabolic dysfunction-associated fatty liver disease
Shuai ZHANG ; Shoulu JIN ; Wanqing LI ; Xijing SHI ; Hao LIANG ; Hao DONG ; Dailong LU ; Ying ZHU ; Xiaoxing XIANG ; Jun LIU
Journal of Clinical Hepatology 2026;42(2):319-325
ObjectiveTo investigate the association between noninvasive liver fibrosis markers and carotid plaque (CP) in patients with lean metabolic dysfunction-associated fatty liver disease (MAFLD), and to provide a basis for screening high-risk populations. MethodsA total of 957 patients with lean MAFLD who underwent physical examination in Subei People’s Hospital from January 2021 to June 2023 was enrolled as the observation cohort, with the presence or absence of CP as the outcome, and fibrosis-4 (FIB-4) index and nonalcoholic fatty liver disease fibrosis score (NFS) were used to assess liver fibrosis degree. The independent-samples t test was used for comparison of normally distributed continuous data between two groups, and the Mann-Whitney U test was used for comparison of non-normally distributed continuous data between two groups; the chi-square test was used for comparison of categorical data between two groups. The multivariate logistic regression analysis, the restricted cubic spline analysis, the receiver operating characteristic curve, and the mediation effect analysis were used to investigate the association between liver fibrosis degree and CP. ResultsThe prevalence rate of CP was 36.6% in the lean MAFLD population. Compared with the non-CP group(n=607), the CP group (n=350) had a significantly higher proportion of male patients, a significantly higher proportion of patients with smoking/diabetes/hypertension, and significantly higher levels of age, creatinine, blood urea nitrogen, triglycerides, fasting blood glucose, aspartate aminotransferase, aspartate aminotransferase/alanine aminotransferase ratio, NFS, and FIB-4 index, as well as significantly lower levels of platelet count and albumin (all P<0.05). The multivariate logistic regression analysis showed that after adjustment for confounding factors, FIB-4 index (odds ratio[OR]=2.979, 95% confidence interval[CI]:2.141 — 4.219, P<0.001) and NFS (OR=1.747, 95%CI: 1.499 — 2.046, P<0.001) were positively correlated with CP. Both FIB-4 index and NFS had a good value in predicting CP. Hypertension had a significant indirect effect on the prevalence rate of CP through its impact on liver fibrosis markers, and its mediating effect accounted for 39.5% — 40.8% of the total effect (P<0.001). ConclusionIn patients with lean MAFLD, NFS and FIB-4 index are significantly positively correlated with the prevalence rate of CP, and they can be used as potential epidemiological predictive indicators. Liver fibrosis markers may play a mediating role in the association between hypertension and CP. Interventions targeting hypertension and liver fibrosis markers may help to prevent and delay the progression of CP.
2.Association of liver fibrosis markers and inflammation markers with the risk of gallstones in patients with metabolic dysfunction-associated fatty liver disease
Shuai ZHANG ; Shoulu JIN ; Wanqing LI ; Xijing SHI ; Hao LIANG ; Hao DONG ; Dailong LU ; Ying ZHU ; Xiaoxing XIANG ; Jun LIU
Journal of Clinical Hepatology 2026;42(3):579-585
ObjectiveTo investigate the association of liver fibrosis scores and inflammation markers with gallstones in patients with metabolic dysfunction-associated fatty liver disease (MAFLD), as well as the mediating role of liver fibrosis scores in the relationship between inflammation markers and gallstones. MethodsA total of 14 567 patients who received physical examination and were diagnosed with MAFLD in Subei People’s Hospital from January 2014 to June 2023 were enrolled in this study, and according to the results of abdominal color Doppler ultrasound, they were divided into gallstone group with 1 724 patients and non-gallstone group with 12 843 patients. Related clinical data were collected from all patients, including demographic data, medical history, family history, physical examination, Color Doppler ultrasound, and biochemical parameters. The biomarkers associated with metabolic disorders and insulin resistance included triglyceride-glucose index (TyG), TyG-body mass index (BMI) index, atherogenic index of plasma (AIP), and non-high-density lipoprotein cholesterol-to-high-density lipoprotein cholesterol ratio (NHHR); the biomarkers associated with inflammation and nutritional status included neutrophil-to-lymphocyte ratio (NLR), neutrophil percentage-to-albumin ratio (NPAR), and monocyte-to-lymphocyte ratio (MLR); the biomarkers for assessing liver fibrosis degree and liver function included albumin-bilirubin (ALBI) score, NAFLD fibrosis score (NFS), fibrosis-4 (FIB-4) index, and aspartate aminotransferase-to-platelet ratio index (APRI). The independent-samples t test was used for comparison of normally distributed continuous data between two groups, while the Mann-Whitney U test was used for comparison of non-normally distributed continuous data between two groups; the chi-square test was used for comparison of categorical data between two groups. Multivariate Logistic regression analysis, restricted cubic spline analysis, and mediating effect analysis were used to assess the association of liver fibrosis markers and inflammation markers with the risk of gallstones. ResultsThe prevalence rate of gallstones was 11.8% among the MAFLD patients. There were significant differences between the gallstone group and the non-gallstone group in sex, age, smoking history, diabetes, hypertension, lymphocytes, platelets, glucose, albumin, serum uric acid, alanine aminotransferase, aspartate aminotransferase, red blood cell, NLR, NPAR, MLR, NFS, FIB-4 index, and ALBI score (all P<0.05). The multivariate Logistic regression analysis showed that NLR (odds ratio [OR]=1.091, 95% confidence interval [CI]: 1.028 — 1.160, P<0.05), NPAR (OR=1.073, 95%CI: 1.042 — 1.105, P<0.05), MLR (OR=1.142, 95%CI: 1.057 — 1.232, P<0.05), NFS (OR=1.239, 95%CI: 1.190 — 1.291, P<0.05), and FIB-4 index (OR=1.326, 95%CI: 1.241 — 1.417, P<0.05) were influencing factors for the prevalence rate of gallstones. The restricted cubic spline analysis showed a significant non-linear association between NFS/FIB-4 index and the risk of gallstone (non-linear P<0.05). The mediating effect analysis further showed that the association of NLR, MLR, and NPAR with gallstones was partially mediated by NFS or FIB-4 index, with a mediating effect accounting for 36.79%、28.09%、29.67% and 18.31%、17.70、11.57%, respectively. ConclusionNFS and FIB-4 index have a non-linear association with the prevalence rate of gallstones in MAFLD patients, and they also mediate the association of NLR, NPAR, and MLR with the risk of gallstone.
3.Diagnosis and differential diagnosis of mucin-rich salivary gland tumors
GUAN Weihang ; LIU Cangwei ; GUO Hao ; LI Jinwei ; WANG Dandan ; QIAO Chunyan ; NIE Mengdong ; QU Ming ; SHI Ce
Journal of Prevention and Treatment for Stomatological Diseases 2026;34(6):606-619
This paper systematically elaborates on the key points of diagnosis and differential diagnosis of salivary gland tumors characterized by a substantial amount of extracellular mucus as a main or prominent feature, and clarifies the core differential features. The term "mucus-rich" specifically denotes that mucus is a major component of the tumor, rather than a focal or minor one. This phenomenon is associated with distinct histogenetic mechanisms: it may result from specific genetic mutations (e.g., AKT1 E17K in mucinous adenocarcinoma) that drive ductal epithelial differentiation into mucus-secreting cells, or from myoepithelial cells secreting glycosaminoglycans that form a myxoid stroma. Salivary gland tumors with abundant extracellular mucus include mucinous cystadenoma, sialadenoma papilliferum-like intraductal papillary tumors, mucinous myoepithelioma, pleomorphic adenoma with mucin-rich stroma, mucinous adenocarcinoma, low-grade mucoepidermoid carcinoma, mucin-rich salivary duct carcinoma and intestinal-type adenocarcinoma. The diagnosis of these tumors is complicated by the dual nature of extracellular mucus: while it is a defining feature of some entities, it can also obscure key diagnostic architectural features in others, leading to histological overlap and inconspicuous diagnostic areas. Given the frequent histological morphological overlap among these tumors, immunohistochemical findings and molecular characteristics have emerged as crucial differential diagnostic criteria. Core differential diagnostic points include the following: histologically, there must be meticulous identification of typical structures obscured by mucin (such as squamoid cells in mucoepidermoid carcinoma and apocrine features in salivary duct carcinoma); in immunohistochemical staining, CK20 is useful for distinguishing intestinal-type adenocarcinoma (positive) from mucinous adenocarcinoma (negative), while androgen receptor aids in differentiating salivary duct carcinoma (positive) from mucoepidermoid carcinoma (negative); and molecular testing plays a critical role in definitive diagnosis (e.g., the AKT1 E17K mutation for mucinous adenocarcinoma, MAML2 rearrangement for mucoepidermoid carcinoma, and MEF2C::SS18 fusion for microsecretory adenocarcinoma). This paper systematically summarizes the core pathological features and differential diagnostic points of mucin-rich salivary gland tumors, aiming to provide a practical reference for clinical pathological diagnosis.
4.Expert consensus on the application of artificial intelligence in lung cancer screening, diagnosis, and treatment (2026 edition)
Wenzhao ZHONG ; Haibo WANG ; Yi HU ; Hao ZHANG ; Jigang DAI ; Junqiang FAN ; Guibin QIAO ; Fan YANG ; Jian HU ; Fengwei TAN ; Xuening YANG ; Qiang PU ; Zihao CHEN ; Hongxia TIAN ; Lunxu LIU ; Hecheng LI ; Xiaolong YAN ; Zongyang YU ; Zhenbin QIU ; Yihua SUN ; Jing HU ; Yuhang SHI ; Zhifei GUO ; Peng ZHANG ; Kezhong CHEN ; Shugeng GAO ; Yilong WU
Chinese Journal of Clinical Thoracic and Cardiovascular Surgery 2026;33(06):848-856
With the continuous deepening of the concept of precision diagnosis and treatment for lung cancer, how to achieve higher efficiency and accuracy in the screening, diagnosis, and treatment pathways in clinical practice has become an important issue that urgently needs to be overcome. The current clinical difficulty lies in the fact that despite continuous advancements in imaging and molecular diagnostic technologies, there are still limitations in manual efficiency and subjective experience when it comes to massive data analysis and multi-scale feature extraction. Artificial intelligence (AI), especially algorithm systems based on deep learning, is an innovative technology capable of deeply empowering medical big data. This method utilizes algorithms such as convolutional neural networks, combined with radiomics, pathomics, and multi-modal data fusion analysis, demonstrating immense potential in early precise detection and benign-malignant differentiation of pulmonary nodules, digital pathological subtype recognition and non-invasive prediction of driver genes, precise 3D surgical planning and automatic delineation of radiotherapy target volumes, as well as dynamic risk warning during follow-up. This innovative technology provides a brand-new solution for realizing intelligent and individualized lung cancer diagnosis and treatment models. This consensus, based on the latest evidence from evidence-based medicine and combined with the development trends in the AI field and real-world clinical needs, was ultimately formed by gathering the consensus opinions of multidisciplinary experts in radiology, pathology, thoracic surgery, and other fields. The main content covers the application specifications of AI in the three core scenarios of lung cancer screening, diagnosis, and treatment, the technical standards for data collection and algorithm validation, as well as the ethical and regulatory challenges faced at the current stage. It aims to clarify the applicable boundaries of AI as a clinical auxiliary decision support tool, providing scientific guidance and standardized exploration directions for peers currently engaged in or planning to carry out AI-assisted clinical diagnosis, treatment, and translation of lung cancer.
5.Combination Therapy of Pyrotinib and Metronomic Vinorelbine in HER2+ Advanced Breast Cancer after Trastuzumab Failure (PROVE): A Prospective Phase 2 Study
Chunfang HAO ; Xu WANG ; Yehui SHI ; Zhongsheng TONG ; Shufen LI ; Xiaodong LIU ; Lan ZHANG ; Jie ZHANG ; Wenjing MENG ; Li ZHANG
Cancer Research and Treatment 2025;57(2):434-442
Purpose:
Approximately 50%-74% of patients with metastatic human epidermal growth factor receptor 2 (HER2)–positive breast cancer do not respond to trastuzumab, with 75% of treated patients experiencing disease progression within a year. The combination of pyrotinib and capecitabine has showed efficacy in these patients. This study evaluates the efficacy and safety of pyrotinib combined with metronomic vinorelbine for trastuzumab-pretreated HER2-positive advanced breast cancer patients.
Materials and Methods:
In this phase 2 trial, patients aged 18-75 years with HER2-positive advanced breast cancer who had previously failed trastuzumab treatment were enrolled to receive pyrotinib 400 mg daily in combination with vinorelbine 40mg thrice weekly. The primary endpoint was progression-free survival (PFS), while secondary endpoints included objective response rate (ORR), disease control rate (DCR), overall survival (OS), and safety.
Results:
From October 21, 2019, to January 21, 2022, 36 patients were enrolled and received at least one dose of study treatment. At the cutoff date, 20 experienced disease progression or death. With a median follow-up duration of 35 months, the median PFS was 13.5 months (95% confidence interval [CI], 8.3 to 18.5). With all patients evaluated, an ORR of 38.9% (95% CI, 23.1 to 56.5) and a DCR of 83.3% (95% CI, 67.2 to 93.6) were achieved. The median OS was not reached. Grade 3 adverse events (AEs) were observed in 17 patients, with diarrhea being the most common (27.8%), followed by vomiting (8.3%) and stomachache (5.6%). There were no grade 4/5 AEs.
Conclusion
Pyrotinib combined with metronomic vinorelbine showed promising efficacy and an acceptable safety profile in HER2-positive advanced breast cancer patients after trastuzumab failure.
6.Effects of previous cytomegalovirus, rubella virus, and herpes simplex virus infections on IVF/ICSI-ET pregnancy outcomes
Huiling AN ; Tongjie LI ; Hao SHI ; Ruizhe ZHANG ; Jingyuan WANG ; Yaping LIU ; Chen WANG ; Jun ZHAI
Chinese Journal of Reproduction and Contraception 2025;45(3):226-233
Objective:To explore the impact of previous cytomegalovirus (CMV), herpes simplex virus (HSV), and rubella virus (RV) infection on pregnancy outcomes in infertile women undergoing the first in vitro fertilization/intracytoplasmic sperm injection and embryo transfer (IVF/ICSI-ET) treatment. Methods:A retrospective cohort study was conducted to analyze the clinical data of women who underwent IVF/ICSI-ET for the first time at the Reproductive Medicine Center, the First Affiliated Hospital of Zhengzhou University from December 2017 to December 2022. The patients were divided into CMV-IgG (+) group ( n=154), RV-IgG (+) group ( n=86), HSV-IgG (+) group ( n=93) and IgG all-negative group ( n=172). The pregnancy outcomes of the patients in the virus-only infection group and the IgG all-negative group were compared. Patients who were previously co-infected with CMV and HSV were classified as the CMV+HSV-IgG (+) group ( n=344), and the pregnancy outcomes of patients with previous CMV and HSV co-infection and those with infection alone were further compared. Results:The two pronuclei (2PN) fertilization rate [63.90% (1 195/1 870)], the clinical pregnancy rate [51.30% (79/154)], and the live birth rate [45.45% (70/154)] of the CMV-IgG (+) group were significantly lower than those of the IgG completely negative group [68.68% (1 469/2 139), P=0.001; 68.60% (118/172), P=0.001; 61.05% (105/172), P=0.005]. The 2PN fertilization rate [61.62% (729/1 183)], the clinical pregnancy rate [50.54% (47/93)], and the live birth rate [43.01% (40/93)] of the HSV-IgG (+) group were significantly lower than those of the IgG completely negative group [68.68% (1 469/2 139), P=0.001; 68.60% (118/172), P=0.004; 61.05% (105/172), P=0.005]. There were no statistical differences in the 2PN fertilization rate, the clinical pregnancy rate, and the live birth rate between the RV-IgG (+) group and the IgG completely negative group (all P>0.05). Compared with the IgG completely negative group, there were no significant differences in the risk of complications such as gestational diabetes, hypertensive disorders of pregnancy and neonatal outcomes in the CMV-IgG (+) group, RV-IgG (+) group, and HSV-IgG (+) group (all P>0.05). Multivariate logistic regression analysis showed that CMV-IgG (+) ( OR=0.453, 95% CI: 0.280-0.734, P=0.001; OR=0.515, 95% CI: 0.321-0.825, P=0.006), HSV-IgG (+) ( OR=0.425, 95% CI: 0.245-0.738, P=0.002; OR=0.447, 95% CI: 0.259-0.771, P=0.004) and CMV+HSV-IgG (+) ( OR=0.491, 95% CI: 0.329-0.733, P=0.001; OR=0.528, 95% CI: 0.357-0.780, P=0.001) were all independent influencing factors of patients' clinical pregnancy and live birth. There were no statistical differences in the clinical outcomes between the previous CMV and HSV co-infection group and the single infection group ( P>0.05). Conclusion:Previous CMV or HSV infection alone reduced the fertilization rate, the clinical pregnancy rate and the live birth rate of patients undergoing IVF/ICSI-ET treatment, but had no significant impact on pregnancy complications and neonatal outcomes. Pregnancy outcomes of patients with previous CMV and HSV co-infection were similar to those with infection alone.
7.Abnormal expression of LC3B, Beclin-1, and p62 in peripheral blood CD 4+ T lymphocytes and their association with pathogenicity in varicella-zoster virus-infected patients
Yan LIU ; Shengming SHI ; Meixia XIAO ; Yangyang HAO
Chinese Journal of Primary Medicine and Pharmacy 2025;32(6):870-874
Objective:To investigate the relationship between the expression of microtubule-associated protein light chain 3B (LC3B), Beclin-1, and p62 in serum CD 4+ T lymphocytes of patients infected with varicella-zoster virus (VZV) and viral replication. Methods:This study used a cross-sectional design. A total of 106 patients with VZV who received treatment at The First People's Hospital of Huzhou between October 2018 and October 2019 were included in the study group. Additionally, 50 healthy individuals who underwent health examinations during the same period were included in the control group. The expression levels of LC3B, Beclin-1, and p62 in serum CD 4+ T lymphocytes among patients with different VZV DNA copy numbers were compared. The effects of different levels of LC3B, Beclin-1, and p62 on disease severity were evaluated. Spearman correlation analysis was performed to investigate the relationship between the expression of LC3B, Beclin-1, and p62 in the peripheral blood CD 4+ T lymphocytes of VZV-infected patients, viral replication, and disease duration. Results:The relative expression levels of LC3B and Beclin-1 in peripheral blood CD 4+ T lymphocytes of the study group were (60.19 ± 7.59)% and (34.99 ± 4.34)%, respectively, which were significantly higher than those in the control group [(37.71 ± 4.33)%, (16.18 ± 1.92)%, t = 19.48, 29.29, both P < 0.001]. The relative expression level of p62 in the study group was significantly lower than that in the control group [(5.81 ± 0.58)% vs. (10.11 ± 1.24)%, t = -29.57, P < 0.001]. The peripheral blood VZV DNA copy number in the study group was (4.28 ± 0.47). In patients with a VZV DNA copy number ≥ 4.28, the expression levels of LC3B [(72.22 ± 8.83)%] and Beclin-1 [(40.09 ± 5.56)%] were significantly higher than those in patients with a VZV DNA copy number < 4.28 [LC3B: (51.23 ± 6.88)%, Beclin-1: (29.67 ± 3.12)%, t = 13.57, 11.77, both P < 0.001]. The expression level of p62 in patients with a VZV DNA copy number ≥ 4.28 [(4.77 ± 0.36)%] was significantly lower than that in patients with a VZV DNA copy number < 4.28 [(6.98 ± 0.79) %, t = -18.76, P < 0.001]. The expression levels of LC3B and Beclin-1 in patients at moderate or advanced stages were significantly higher than those in patients with early-stage VZV ( P < 0.05), while the expression levels of p62 in patients with moderate- or advanced-stage VZV were significantly lower than those in patients with early-stage VZV (both P < 0.05). Additionally, the expression levels of LC3B and Beclin-1 were positively correlated with viral replication ( r = 0.817, 0.839) and disease duration ( r = 0.849, 0.822, all P < 0.001). The expression level of p62 was negatively correlated with viral replication and disease duration ( r = -0.850, -0.822, both P < 0.001). Conclusions:In patients infected with VZV, the autophagy levels in peripheral blood CD 4+ T lymphocytes were significantly upregulated, as evidenced by increased expression of LC3B and Beclin-1 and decreased expression of p62. Autophagy positively influences viral replication, with elevated autophagy levels promoting viral replication.
8.Molecular mechanisms and prospects for disease treatment of ciliogenesis and autophagy
Hao-liang HU ; Jin WANG ; Jia-yan LIU ; Shi-fang HUANG ; Yu-ting LI ; Zhe CHEN ; Lin-xi CHEN
Chinese Pharmacological Bulletin 2025;41(4):631-637
Cilia,as cellular sensory organelles,actively partici-pate in and regulate cellular processes such as autophagy and metabolic breakdown during their generation and transportation.Autophagy,on the other hand,is a cell self-protection mecha-nism that maintains cellular homeostasis by clearing aggregates and damaged organelles.Combining recent research findings,this review comprehensively elucidates the bidirectional crosstalk between primary cilia and autophagy.Specifically,it highlights the crucial role of cilia-dependent signaling pathways in activa-ting cellular autophagy and how autophagy regulates cilia genera-tion and length by degrading specific ciliary proteins.Moreover,the dysregulation of primary cilia and autophagy is closely asso-ciated with the clinical manifestations and pathogenesis of vari-ous ciliopathy-related diseases such as polycystic kidney disease and tuberous sclerosis.In terms of pharmacotherapy,this review provides a comprehensive and in-depth overview of small mole-cule inhibitors targeting ciliogenesis,including cytoskeletal drugs and Hedgehog signaling pathway inhibitors.Despite the current limitations in clinical use,these drugs lay the groundw-ork for developing highly specific targeted small molecule inhibi-tors of ciliogenesis and for the treatment of ciliopathies and canc-ers.By systematically discussing ciliogenesis,autophagy,disea-ses and drugs,this review offers new insights for further elucida-ting the crosstalk between ciliogenesis and autophagy,exploring their pathological mechanisms in disease development,and de-veloping therapeutic strategies in the future.
9.Application of cymene care solution in prognostic management of chronic periodontitis
Bing HAN ; Dan WANG ; Hao GUO ; Tong ZUO ; Ya'nan SHI ; Juan TONG ; Huan ZHANG ; Rui LIU
Journal of Practical Stomatology 2025;41(3):417-419
40 patients with choronic periodontitis underwent periodontal basic treatment were randomly divided into 2 groups(n=20).The patients in control group used special toothpaste and toothbrush to brush their teeth after meals,those in the experimental group brushed their teeth with special toothpaste and toothbrush in the morning,evening and after meals,and wore personalized film pressing trays containing cymene care solution while sleeping at night.Gingival bleeding,periodontal pocket depth and attachment loss were ob-served after 4,6 and 10 weeks respectively.The personalized tray combined with cymbidium reduced the depth of periodontal pocket(P<0.05)and the rate of probing bleeding sites(P<0.05)more effectively,and showed no statistical significance in the change of attachment loss(P<0.05).Cymene care solution is effective in the improvement of periodontal health.
10.In vitro fluorescent substrate assay for the activity of leucine aminopeptidase(LAP)in Echinococcus multilocularis
Jia-yu CHEN ; Yao DAI ; Shun-juan WANG ; Yang XIAO ; Xin-zong YAN ; Tong LIU ; Zhi-hao YUAN ; Kai-li SHI ; Run-le LI ; Feng TANG
Chinese Journal of Zoonoses 2025;41(1):23-31
This study was aimed at developing an in vitro fluorescent substrate assay for the activity of leucyl aminopeptid-ase(LAP)from Echinococcus multilocularis and comparing it with the chemical chromogenic substrate enzyme activity assay.Through the establishment of reaction conditions for the fluorescent substrate-based in vitro enzyme activity assay,we com-pared the differences between the fluorescent substrate L-Leucine-7-amido-4-methylocoumarin(Leu-AMC)and the chemical chromogenic substrate L-Leucine-4-nitroanilide(Leu-pNA)through molecular docking,inhibition rates,and precision measures.Molecular docking revealed that the fluorescent substrate Leu-AMC had higher affinity for the protein than the chemical chromogenic substrate Leu-pNA.Through analysis of the effects of varying reaction conditions on fluorescence intensi-ty,we optimized the fluorescent substrate enzyme activity assay to demonstrate favorable performance at a reaction temperature of 37℃,a pH of 9.0,a protein concentration of 800 nmol/L,and a reaction duration of 60 minutes.Leu-AMC exhibited significant and distinct responses at a 5 μmol/L substrate concentration,under varying substrate conditions.The fluo-rescent substrate assay demonstrated more significant intergroup differences than the chemical chromogenic substrate assay when various inhibitors were added.This study established a fluorescence-based enzyme activity assay for leucyl aminopeptidase from Echinococcus multilocularis by using Leu-AMC as the substrate;this method demonstrated a more significant intergroup difference and sensitivity than the chemical chromogenic substrate assay.


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