ObjectiveThis paper aims to conduct the feature analysis and correlation analysis on the ocular collateral features and differential metabolites in patients with chronic hepatitis B （CHB） complicated by glucose metabolism disorder （GMD），particularly those with the damp-heat syndrome type，by integrating shadowless scleral imaging and metabolomics technologies. MethodsA total of 313 patients were recruited from the Hepatology and Endocrinology Outpatient Departments of Public Health Clinical Center of Chengdu according to the inclusion/exclusion criteria，and they were divided into a CHB group and a CHB complicated by GMD groups （damp-heat syndrome group and non-damp-heat syndrome group）. All patients underwent high-definition ocular image acquisition and feature extraction using an intelligent analysis system for shadowless scleral imaging to analyze the differences in the counting of morphological feature scores of ocular collaterals among groups. By using a digital sampling method，24 patients from each group were randomly selected，along with 20 healthy volunteers，for untargeted metabolomic analysis of peripheral serum. Differential metabolites were identified，statistically analyzed，and subjected to potential biomarker analysis and pathway enrichment. Spearman method was performed to conduct the correlation analysis on the differential ocular collateral features and differential metabolites，followed by correlation network construction. ResultsCompared with those in the CHB group，patients with CHB complicated by GMD showed significant changes in ocular collateral feature scores such as "hillock"，"blood vessels"，and "pale dusky coloration" （P<0.05）. In comparison with those in the healthy group，metabolites including N-acetylglucosamine，acetylhomoserine，and myo-inositol （AUC>0.7） were identified as potential biomarkers for the disease. Compared with those in the CHB complicated by GMD group with non-damp-heat syndrome，patients with damp-heat syndrome exhibited significant changes in feature scores of "plaques"，"yellow coloration"，"spleen"，and "gallbladder" （P<0.05）. In comparison with those in the healthy group，metabolites such as O²′-4a-cyclic tetrahydrobiopterin，theobromine，xanthurenic acid，and L-glutamic acid 5-phosphate （AUC>0.7） were identified as potential biomarkers for the damp-heat syndrome type. The Spearman correlation analysis reveals weak to moderate linear correlations between the differential scleral collateral features and metabolites. By constructing a "disease-syndrome" network of ocular diagnosis and metabolites，"xanthurenic acid-gallbladder" and "theobromine-plaque/yellow coloration" were identified as specific molecular-phenotypic correlated biomarker clusters for CHB complicated by GMD with dampness-heat syndrome. ConclusionPatients with CHB complicated by GMD demonstrate differential ocular diagnostic features and serum metabolites corresponding to disease states and dampness-heat syndrome. These objective biomarkers can guide both clinical syndrome differentiation and medication. The macro-micro integration based on ocular feature clusters and potential metabolic biomarkers offers an innovative approach to a combined traditional Chinese and Western medicine diagnosis and treatment model for this disease.

Objective To observe the effects of 3 different nutritional support modes of nasogastric tube nutrition,nasoenteric tube nutrition and nasoenteric tube combined with nasogastric tube nutrition on the biliary-related indices of critically ill patients.Methods The observational research method was conducted,the patients admitted to the department of intensive care unit(ICU)of Qingdao Hospital,University of Health and Rehabilitation Sciences(Qingdao Municipal Hospital)from June 2023 to May 2024 serving as the subjects of the study.The subjects were divided into three groups,namely the nasogastric tube group(indwelling nasogastric tube for enteral nutrition),the nasoenteric tube group(indwelling nasoenteric tube for enteral nutrition),and the mixed nutrition group(indwelling nasoenteric tube combined with naso-gastric tube for enteral nutrition)according to the different modes of enteral nutrition given.The clinical data of the patients was collected,including gender,age,previous underlying diseases,nutritional risk screening 2002(NRS2002)score,acute physiology and chronic health evaluationⅡ(APACHEⅡ),gallbladder volume,data on laboratory-related indices,and prognosis during hospitalisation.Compare the differences between the observed indicators and their change values before and after the initiation of enteral nutrition within each group;analyse the correlation between gallbladder volume and other observed indicators using Spearman's correlation analysis;screen the influencing factors of gallbladder volume using univariate regression analysis;screen the influencing factors of ICU patients'survival during hospitalisation using multifactorial Logistic regression analysis,and plot the receiver operator characteristic curve(ROC curve)of the subjects to analyse the predictive value of each influencing factor on patients'prognosis.Results A total of 141 patients who met the inclusion criteria were included in the study,comprising 54 cases in the nasogastric tube group,38 cases in the nasoenteric tube group,and 49 cases in the mixed nutrition group.Of the patients who survived during ICU hospitalization,105 survived,while 36 died,mortality was 25.53%.① No statistically significant differences were observed in the comparison of gender,age,previous underlying disease,NRS2002 score,and APACHEⅡscore among the enrolled groups.② A comparative analysis was conducted on the biliary-related indexes of the nasogastric tube and nasoenteric tube groups before and after the initiation of enteral nutrition.The results revealed no statistically significant differences between the two groups.On the 7th day of enteral nutrition initiation,the gallbladder volume of the nasoenteric tube group was found to be significantly larger than the gallbladder volume on the 1st day(cm3:28.00±6.36 vs.25.20±4.75,P<0.05).In the mixed nutrition group,the gallbladder volume on the initiation of enteral nutrition on day 7 was significantly smaller than that on the 1st day of initiating enteral nutrition(cm3:25.03±4.69 vs.28.68±5.96,P<0.05).③A comparative analysis was conducted among the three groups,revealing significant variations in the values of alanine aminotransferase(ALT),aspartate aminotransferase(AST),total bilirubin(TBil),indirect bilirubin(IBil),alkaline phosphatase(ALP),γ-glutamyltranspeptidase(γ-GT),and gallbladder volume across the groups.From 1-7 days following the initiation of enteral nutrition,the bile-related indexes in the nasoenteric tube group exhibited an increasing trend,while the bile-related indexes in the mixed nutrition group demonstrated a decreasing trend.④ Spearman correlation analysis showed that gallbladder volume was significantly and positively correlated with AST,ALT,ALP,and γ-GT(r values of 0.398,0.299,0.242,and 0.262,respectively,all P<0.01).⑤ Multivariate Logistic regression analysis demonstrated that the initiation of enteral nutrition for 7 days was associated with a significant advantage,as indicated by an odds ratio(OR)of 1.031,with a 95%confidence interval(95%CI)of 1.004-1.058,and a P value was 0.024.Furthermore,the initiation of enteral nutrition for 7 d AST(OR=1.031,95%CI was 1.004-1.058,P=0.024),TBil(OR=1.187,95%CI was 1.039-1.355,P=0.011),and IBil(OR=0.707,95%CI was 0.542-0.921,P=0.010),and γ-GT(OR=0.985,95%CI was 0.972-0.999,P=0.034)were all factors affecting the survival of ICU patients during hospitalisation.Conclusions In the context of patients receiving intensive care,the prolonged utilisation of nasoenteric feeding tubes for a duration exceeding seven days has been observed to potentially induce an augmentation in gallbladder volume and an elevation in biliary-related indices,including ALT,AST,ALP,and γ-GT.The concomitant administration of nasogastric feeding,grounded in the foundation of simple nasoenteric tube nutrition,has been demonstrated to result in a reduction of these biliary-related indices to a certain extent.

AIM To study the chemical constituents from the stems and leaves of Dendrobium formosum Roxb.ex Lindl.and their biological activities.METHODS The 95％ethanol extract from the stems and leaves of D.formosum was isolated and purified by silica gel,Sephadex LH-20 and semi-preparative HPLC,then the structures of obtained compounds were identified by physicochemical properties and spectral data.Their inhibitory activities onα-glucosidase were determined by PNPG method,and their in vitro anti-inflammatory activities were evaluated by RAW264.7 model.RESULTS Fifteen compounds were isolated and identified as coniferyl p-coumarate(1),(-)-pinoresinol(2),2,5,7-trihydroxy-4-methoxy-9,10-dihydrophenanthrene(3),naringenin(4),spiropreussomerin A(5),7-hydroxy-14-de-O-methyl-lasiodiplodin(6),(4S,5S,6Z,8E)-5-hydroxydeca-6,8-dien-4-olide(7),(6S,9R)-blumenol C(8),p-hydroxybenzoic acid(9),m-hydroxybenzoic acid(10),p-hydroxy benzenepropanoic acid(11),5,7-dihydroxy-isobenzofuran(12),2-(4-hydroxyphenyl)-ethanol(13),β-sitostenone(14),β-sitosterol(15).The IC50 values of compounds 1 and 4 on α-glucosidase inhibition were(65.60±3.31)and(98.95±2.53)μmol/L,respectively.Compound 3 presented inhibitory activity on NO production in RAW 264.7 cells,with IC50 value of(3.97±0.12)μmol/L.CONCLUSION Compounds 5-6,8 and 12 are isolated from Orchidacae family for the first time,and 2-15 are first isolated from this plant.Compounds 1 and 4 have α-glucosidase inhibitory activities,and 3 has anti-inflammatory activity.

Aim To investigate the effect of eplerenone(EPL)on the alleviation of rheumatoid arthritis(RA)based on voltage-gated potassium channel 1.3(Kv1.3)/B-cell lymphoma-2(Bcl-2)/nuclear factor-κB(NF-κB)to inhibit macrophage M1 polarization in mice.Methods Bioinformatics technology was used to screen disease pathways and targets,and the binding affinity and stability of EPL-Kv1.3 complex system were calculated.A mouse model of RA was established and treated with EPL by intragastric administration for 42 days.The indicators reflecting drug remission of RA were recorded and detected.RAW264.7 cells were treated with EPL to detect the indicators reflecting the effect of drugs on macrophage M1 polarization,and to verify the upstream and downstream key targets of re-lated signaling pathways mediated by drugs.Results Bioinformatics analysis showed that the disease targets were mainly involved in inflammatory response and NF-κB signaling pathway,and EPL-Kv1.3 had high affinity and stable binding.In animal experiments,the detec-tion of anti-cyclic citrullinated peptide antibody(CCP-Ab)and joint score indicated the successful establish-ment of the model.Compared with the model group,EPL could reduce the toe redness and swelling score,alleviate the plantar redness and swelling,synovial swelling,and reduce fibrosis and inflammatory cell in-filtration in mice.The medium-dose and high-dose EPL groups reduced the HE staining score(P＜0.05,P＜0.01),and the high-dose EPL group reduced the serum RF in mice(P＜0.01).CCK-8 results showed that low,medium and high doses of EPL had no effect on the activity of RAW264.7 macrophages(P＞0.05).Compared with the model group,EPL treatment significantly reduced the contents of IL-6,TNF-α and NO in supernatant of the cells(P＜0.01),reduced the nuclear translocation of NF-KB-p65 in the high-dose EPL group,reduced the M1 polarization and increased the proportion of M2 polarization in the medium and high-dose EPL groups(P＜0.01).The mRNA levels of MyD88,IκB-α,NF-κB-p65,NF-KB-p50,IL-1 β and iNOS were significantly reduced in each dose group of EPL(P＜0.01).EPL significantly increased the pro-tein expression of Bcl-2(P＜0.01)and decreased the protein expression of Kv1.3,MyD88,p-IκB-α/IκB-α,p-p65/p65,IL-1 β and iNOS(P＜0.05).Conclusion EPL may play an immunomodulatory role in relieving RA in mice by regulating Kv1.3/Bcl-2/NF-κB path-way,reducing macrophage M1 polarization and amelio-rating macrophage-associated inflammatory response.

Objective:To study the expression of serum microRNA (miRNA)-335 and miRNA-375 in patients with papillary thyroid carcinoma (PTC) and their relationship with pathological features and prognosis.Methods:Using a case-control study method, 94 PTC patients admitted to Huaian Hospital of Huaian City from March 2021 to March 2023 were selected as PTC group. Another 73 healthy individuals who underwent physical examinations during the same period were selected as control group. Quantitative real-time PCR was used to determine the relative expression levels of serum miRNA-335 and miRNA-375. PTC patients were followed up until September 30, 2024, and the patient's prognosis was record. The relative expression levels of serum miRNA-335 and miRNA-375 were compared between the two groups, among different pathological features, and among patients with different prognoses. Multivariate logistic regression analysis was performed to identify independent risk factors for prognosis in PTC patients.Results:The relative expression level of serum miRNA-335 in the PTC group (2.35 ± 0.68) was higher than that in the control group (0.98 ± 0.04), while the relative expression level of miRNA-375 (0.65 ± 0.21) was lower than that in the control group (1.01 ± 0.02, P < 0.001). There was no statistically significant differences in the relative expression levels of serum miRNA-335 and miRNA-375 among PTC patients with different tumor diameters, tumor locations, tumor numbers, and vascular invasion ( P > 0.05). The relative expression level of serum miRNA-335 in TNM stages Ⅲ - Ⅳ was higher than that in stages Ⅰ - Ⅱ, while the relative expression level of miRNA-375 in TNM stages Ⅲ - Ⅳ was lower than that in stages Ⅰ - Ⅱ ( P < 0.001). The relative expression level of serum miRNA-335 of patients with lymph node metastasis was higher than that of patients without lymph node metastasis, while the relative expression level of serum miRNA-375 of patients with lymph node metastasis was lower than that of patients without lymph node metastasis ( P < 0.001). The relative expression level of serum miRNA-335 in the poor prognosis group was higher than that in the good prognosis group, while the relative expression level of miRNA-375 in the poor prognosis group was lower than that in the good prognosis group ( P < 0.001). Vascular invasion, lymph node metastasis, high expression of miRNA-335, and low expression of miRNA-375 were all independent risk factors for prognosis in PTC patients ( P < 0.05). Conclusion:Patients with PTC have high serum miRNA-335 expression and low miRNA-375 expression, and the expression of miRNA-335 and miRNA-375 is closely related to TNM staging, lymph node metastasis, and prognosis, which deserves clinical attention.

Aim To investigate the effect of eplerenone(EPL)on the alleviation of rheumatoid arthritis(RA)based on voltage-gated potassium channel 1.3(Kv1.3)/B-cell lymphoma-2(Bcl-2)/nuclear factor-κB(NF-κB)to inhibit macrophage M1 polarization in mice.Methods Bioinformatics technology was used to screen disease pathways and targets,and the binding affinity and stability of EPL-Kv1.3 complex system were calculated.A mouse model of RA was established and treated with EPL by intragastric administration for 42 days.The indicators reflecting drug remission of RA were recorded and detected.RAW264.7 cells were treated with EPL to detect the indicators reflecting the effect of drugs on macrophage M1 polarization,and to verify the upstream and downstream key targets of re-lated signaling pathways mediated by drugs.Results Bioinformatics analysis showed that the disease targets were mainly involved in inflammatory response and NF-κB signaling pathway,and EPL-Kv1.3 had high affinity and stable binding.In animal experiments,the detec-tion of anti-cyclic citrullinated peptide antibody(CCP-Ab)and joint score indicated the successful establish-ment of the model.Compared with the model group,EPL could reduce the toe redness and swelling score,alleviate the plantar redness and swelling,synovial swelling,and reduce fibrosis and inflammatory cell in-filtration in mice.The medium-dose and high-dose EPL groups reduced the HE staining score(P＜0.05,P＜0.01),and the high-dose EPL group reduced the serum RF in mice(P＜0.01).CCK-8 results showed that low,medium and high doses of EPL had no effect on the activity of RAW264.7 macrophages(P＞0.05).Compared with the model group,EPL treatment significantly reduced the contents of IL-6,TNF-α and NO in supernatant of the cells(P＜0.01),reduced the nuclear translocation of NF-KB-p65 in the high-dose EPL group,reduced the M1 polarization and increased the proportion of M2 polarization in the medium and high-dose EPL groups(P＜0.01).The mRNA levels of MyD88,IκB-α,NF-κB-p65,NF-KB-p50,IL-1 β and iNOS were significantly reduced in each dose group of EPL(P＜0.01).EPL significantly increased the pro-tein expression of Bcl-2(P＜0.01)and decreased the protein expression of Kv1.3,MyD88,p-IκB-α/IκB-α,p-p65/p65,IL-1 β and iNOS(P＜0.05).Conclusion EPL may play an immunomodulatory role in relieving RA in mice by regulating Kv1.3/Bcl-2/NF-κB path-way,reducing macrophage M1 polarization and amelio-rating macrophage-associated inflammatory response.

Objective: Patients with severe symptomatic aortic stenosis are assessed for coronary artery disease (CAD) prior to transcatheter aortic valve implantation (TAVI) with treatment implications. Invasive coronary angiography (ICA) is the recommended modality but is associated with peri-procedural complications. Integrating machine learning (ML)-based computed tomography-derived fractional flow reserve (CT-FFR) into existing TAVI-planning CT protocol may aid exclusion of significant CAD and thus avoiding ICA in selected patients. Materials and Methods: A single-center, retrospective study was conducted, 41 TAVI candidates with both TAVI-planning CT and ICA performed were analyzed. CT datasets were evaluated by a ML-based CT-FFR software. Beta-blocker and nitroglycerin were not administered in these patients. The primary outcome was to identify significant CAD. The diagnostic performance of CT-FFR was compared against ICA. Results: On per-patient level, the sensitivity, specificity, positive predictive value (PPV), negative predictive value (NPV) and diagnostic accuracy were 89%, 94%, 80%, 97% and 93%, respectively. On per-vessel level, the sensitivity, specificity, PPV, NPV and diagnostic accuracy were 75%, 94%, 67%, 96% and 92%, respectively. The area under the receiver operative characteristics curve per individual coronary vessels yielded overall 0.90 (95% confidence interval 85%–95%). ICA may be avoided in up to 80% of patients if CT-FFR results were negative. Conclusion ML-based CT-FFR can provide accurate screening capabilities for significant CAD thus avoiding ICA. Its integration to existing TAVI-planning CT is feasible with the potential of improving the safety and efficiency of pre-TAVI CAD assessment.

Objective To observe the effects of 3 different nutritional support modes of nasogastric tube nutrition,nasoenteric tube nutrition and nasoenteric tube combined with nasogastric tube nutrition on the biliary-related indices of critically ill patients.Methods The observational research method was conducted,the patients admitted to the department of intensive care unit(ICU)of Qingdao Hospital,University of Health and Rehabilitation Sciences(Qingdao Municipal Hospital)from June 2023 to May 2024 serving as the subjects of the study.The subjects were divided into three groups,namely the nasogastric tube group(indwelling nasogastric tube for enteral nutrition),the nasoenteric tube group(indwelling nasoenteric tube for enteral nutrition),and the mixed nutrition group(indwelling nasoenteric tube combined with naso-gastric tube for enteral nutrition)according to the different modes of enteral nutrition given.The clinical data of the patients was collected,including gender,age,previous underlying diseases,nutritional risk screening 2002(NRS2002)score,acute physiology and chronic health evaluationⅡ(APACHEⅡ),gallbladder volume,data on laboratory-related indices,and prognosis during hospitalisation.Compare the differences between the observed indicators and their change values before and after the initiation of enteral nutrition within each group;analyse the correlation between gallbladder volume and other observed indicators using Spearman's correlation analysis;screen the influencing factors of gallbladder volume using univariate regression analysis;screen the influencing factors of ICU patients'survival during hospitalisation using multifactorial Logistic regression analysis,and plot the receiver operator characteristic curve(ROC curve)of the subjects to analyse the predictive value of each influencing factor on patients'prognosis.Results A total of 141 patients who met the inclusion criteria were included in the study,comprising 54 cases in the nasogastric tube group,38 cases in the nasoenteric tube group,and 49 cases in the mixed nutrition group.Of the patients who survived during ICU hospitalization,105 survived,while 36 died,mortality was 25.53%.① No statistically significant differences were observed in the comparison of gender,age,previous underlying disease,NRS2002 score,and APACHEⅡscore among the enrolled groups.② A comparative analysis was conducted on the biliary-related indexes of the nasogastric tube and nasoenteric tube groups before and after the initiation of enteral nutrition.The results revealed no statistically significant differences between the two groups.On the 7th day of enteral nutrition initiation,the gallbladder volume of the nasoenteric tube group was found to be significantly larger than the gallbladder volume on the 1st day(cm3:28.00±6.36 vs.25.20±4.75,P<0.05).In the mixed nutrition group,the gallbladder volume on the initiation of enteral nutrition on day 7 was significantly smaller than that on the 1st day of initiating enteral nutrition(cm3:25.03±4.69 vs.28.68±5.96,P<0.05).③A comparative analysis was conducted among the three groups,revealing significant variations in the values of alanine aminotransferase(ALT),aspartate aminotransferase(AST),total bilirubin(TBil),indirect bilirubin(IBil),alkaline phosphatase(ALP),γ-glutamyltranspeptidase(γ-GT),and gallbladder volume across the groups.From 1-7 days following the initiation of enteral nutrition,the bile-related indexes in the nasoenteric tube group exhibited an increasing trend,while the bile-related indexes in the mixed nutrition group demonstrated a decreasing trend.④ Spearman correlation analysis showed that gallbladder volume was significantly and positively correlated with AST,ALT,ALP,and γ-GT(r values of 0.398,0.299,0.242,and 0.262,respectively,all P<0.01).⑤ Multivariate Logistic regression analysis demonstrated that the initiation of enteral nutrition for 7 days was associated with a significant advantage,as indicated by an odds ratio(OR)of 1.031,with a 95%confidence interval(95%CI)of 1.004-1.058,and a P value was 0.024.Furthermore,the initiation of enteral nutrition for 7 d AST(OR=1.031,95%CI was 1.004-1.058,P=0.024),TBil(OR=1.187,95%CI was 1.039-1.355,P=0.011),and IBil(OR=0.707,95%CI was 0.542-0.921,P=0.010),and γ-GT(OR=0.985,95%CI was 0.972-0.999,P=0.034)were all factors affecting the survival of ICU patients during hospitalisation.Conclusions In the context of patients receiving intensive care,the prolonged utilisation of nasoenteric feeding tubes for a duration exceeding seven days has been observed to potentially induce an augmentation in gallbladder volume and an elevation in biliary-related indices,including ALT,AST,ALP,and γ-GT.The concomitant administration of nasogastric feeding,grounded in the foundation of simple nasoenteric tube nutrition,has been demonstrated to result in a reduction of these biliary-related indices to a certain extent.

AIM To study the chemical constituents from the stems and leaves of Dendrobium formosum Roxb.ex Lindl.and their biological activities.METHODS The 95％ethanol extract from the stems and leaves of D.formosum was isolated and purified by silica gel,Sephadex LH-20 and semi-preparative HPLC,then the structures of obtained compounds were identified by physicochemical properties and spectral data.Their inhibitory activities onα-glucosidase were determined by PNPG method,and their in vitro anti-inflammatory activities were evaluated by RAW264.7 model.RESULTS Fifteen compounds were isolated and identified as coniferyl p-coumarate(1),(-)-pinoresinol(2),2,5,7-trihydroxy-4-methoxy-9,10-dihydrophenanthrene(3),naringenin(4),spiropreussomerin A(5),7-hydroxy-14-de-O-methyl-lasiodiplodin(6),(4S,5S,6Z,8E)-5-hydroxydeca-6,8-dien-4-olide(7),(6S,9R)-blumenol C(8),p-hydroxybenzoic acid(9),m-hydroxybenzoic acid(10),p-hydroxy benzenepropanoic acid(11),5,7-dihydroxy-isobenzofuran(12),2-(4-hydroxyphenyl)-ethanol(13),β-sitostenone(14),β-sitosterol(15).The IC50 values of compounds 1 and 4 on α-glucosidase inhibition were(65.60±3.31)and(98.95±2.53)μmol/L,respectively.Compound 3 presented inhibitory activity on NO production in RAW 264.7 cells,with IC50 value of(3.97±0.12)μmol/L.CONCLUSION Compounds 5-6,8 and 12 are isolated from Orchidacae family for the first time,and 2-15 are first isolated from this plant.Compounds 1 and 4 have α-glucosidase inhibitory activities,and 3 has anti-inflammatory activity.

Objective:To study the expression of serum microRNA (miRNA)-335 and miRNA-375 in patients with papillary thyroid carcinoma (PTC) and their relationship with pathological features and prognosis.Methods:Using a case-control study method, 94 PTC patients admitted to Huaian Hospital of Huaian City from March 2021 to March 2023 were selected as PTC group. Another 73 healthy individuals who underwent physical examinations during the same period were selected as control group. Quantitative real-time PCR was used to determine the relative expression levels of serum miRNA-335 and miRNA-375. PTC patients were followed up until September 30, 2024, and the patient's prognosis was record. The relative expression levels of serum miRNA-335 and miRNA-375 were compared between the two groups, among different pathological features, and among patients with different prognoses. Multivariate logistic regression analysis was performed to identify independent risk factors for prognosis in PTC patients.Results:The relative expression level of serum miRNA-335 in the PTC group (2.35 ± 0.68) was higher than that in the control group (0.98 ± 0.04), while the relative expression level of miRNA-375 (0.65 ± 0.21) was lower than that in the control group (1.01 ± 0.02, P < 0.001). There was no statistically significant differences in the relative expression levels of serum miRNA-335 and miRNA-375 among PTC patients with different tumor diameters, tumor locations, tumor numbers, and vascular invasion ( P > 0.05). The relative expression level of serum miRNA-335 in TNM stages Ⅲ - Ⅳ was higher than that in stages Ⅰ - Ⅱ, while the relative expression level of miRNA-375 in TNM stages Ⅲ - Ⅳ was lower than that in stages Ⅰ - Ⅱ ( P < 0.001). The relative expression level of serum miRNA-335 of patients with lymph node metastasis was higher than that of patients without lymph node metastasis, while the relative expression level of serum miRNA-375 of patients with lymph node metastasis was lower than that of patients without lymph node metastasis ( P < 0.001). The relative expression level of serum miRNA-335 in the poor prognosis group was higher than that in the good prognosis group, while the relative expression level of miRNA-375 in the poor prognosis group was lower than that in the good prognosis group ( P < 0.001). Vascular invasion, lymph node metastasis, high expression of miRNA-335, and low expression of miRNA-375 were all independent risk factors for prognosis in PTC patients ( P < 0.05). Conclusion:Patients with PTC have high serum miRNA-335 expression and low miRNA-375 expression, and the expression of miRNA-335 and miRNA-375 is closely related to TNM staging, lymph node metastasis, and prognosis, which deserves clinical attention.