1.Staged Efficacy of Qijia Rougan Prescription Combined with Entecavir for Chronic Hepatitis B-related Hepatic Fibrosis with Qi Deficiency and Collateral Stasis Syndrome Based on "Zhu Ke Jiao" Theory
Baixue LI ; Xin WANG ; Jibin LIU ; Li WEN ; Cen JIANG ; Wenjun WU ; Dong WANG ; Shuwan LIU ; Huabao LIU ; Yongli ZHENG ; Liang HUANG ; Yue SU ; Song ZHANG ; Yanan SHANG ; Hang ZHOU ; Quansheng FENG
Chinese Journal of Experimental Traditional Medical Formulae 2026;32(9):180-188
ObjectiveThis paper aims to investigate and evaluate the staged efficacy and safety of the representative empirical prescription of the “Zhu Ke Jiao” theory, Qijia Rougan prescription, combined with entecavir in the treatment of hepatic fibrosis in chronic hepatitis B. MethodsA multicenter randomized controlled clinical study was conducted, and 101 patients diagnosed with chronic hepatitis B-related hepatic fibrosis (CHB-HF) who met the diagnosis and inclusion criteria were randomly assigned to an observation group (Qijia Rougan prescription + entecavir) and a control group (entecavir). The treatment duration was 24 weeks. Liver stiffness measurement (LSM), fibrosis-4 index (FIB-4), portal vein diameter, hepatitis B serology, biochemical indicators, hepatic fibrosis markers in serum [hyaluronic acid (HA), laminin (LN), procollagen Ⅲ peptide (PⅢP), and type Ⅳ collagen (Ⅳ-C)], and traditional Chinese medicine syndrome scores were used as efficacy evaluation indicators. Efficacy assessments and explorations of different staged subgroups of Qijia Rougan prescription were conducted according to LSM values based on the Metavir pathological staging standard. ResultsA total of 98 cases were included for statistical analysis, with 49 cases in the observation group and 49 in the control group. The general data of the patients in both groups were comparable. Compared with the same group before treatment, the observation group showed a significant reduction in LSM and FIB-4 (P<0.01), as well as notable improvements in LN, Ⅳ-C, and various TCM syndrome scores (P<0.05, P<0.01). When compared to the control group after treatment, the observation group demonstrated significant improvements in LSM, FIB-4, and various TCM syndrome score indicators (P<0.05, P<0.01), indicating that the observation group performed better than the control group. Subgroup analysis of the regression of hepatic fibrosis stages showed that compared to the same group before treatment, the observation group had better improvement in regression of stages F2 and F3 (P<0.05). When compared to the control group after treatment, the observation group exhibited superior improvement in regression of stage F3 (P<0.05). No adverse events occurred in either group during the treatment period. ConclusionCompared with entecavir alone, the combination of Qijia Rougan prescription and entecavir significantly improves the degree of hepatic fibrosis and clinical TCM symptoms in patients. The optimal intervention period is primarily during stage F3, which is a potential “interception” point of the “Zhu Ke Jiao” theory.
2.Discussion on Construction of a Multi-Agent "Cross-scale" Collective Decision-making Model for Superior Disease Entities in Sichuan-style Traditional Chinese Medicine
Qiuping CHEN ; Hang ZHOU ; Dan ZHENG ; Baixue LI ; Chenhao LIU ; Ju CHEN ; Jibin LIU ; Quansheng FENG ; JIANGYUMING ; Cen JIANG
Chinese Journal of Experimental Traditional Medical Formulae 2026;32(14):1-13
At present, the systematic excavation of the clinical experience and academic thought of the Sichuan school of Chinese medicine vis-à-vis its dominant disease entities remains fragmentary, and replicable paradigms are scarce. Confronted with empirical fragmentation, data heterogeneity and decision-making subjectivity, the standardised distillation, inheritance and clinical translation of these distinctive experiences has become a critical bottleneck constraining the development of the Sichuan school. The integration of artificial-intelligence technologies in data processing, pattern recognition and intelligent decision-making has rendered deep mining of traditional Chinese medicine(TCM) clinical knowledge and patterns imperative. Constructing an intelligent modern TCM diagnostic-therapeutic-evaluative system is now the obligatory route for inheritance and innovation in Chinese medicine, and simultaneously provides a technological breakthrough for intelligent decision paradigms in the dominant diseases of the Sichuan school. Accordingly, this study adopts the regional academic school as its point of entry, focuses on the dominant diseases of the Sichuan school, and proposes an innovative pathway of "four-dimensional data-multi-modal fusion-multi-agent decision-making". Specifically, four data dimensions are defined and instantiated: (Ⅰ) knowledge from classical medical literature and historical case records. (Ⅱ) objective four-diagnosis phenotypic data. (Ⅲ) master physicians' prescribing regularities. (Ⅳ) characteristic mechanisms of renowned formulae. Leveraging multi-modal data fusion and generative artificial intelligence, the entire causal chain of Famous Physicians and Renowned Formulas is explicated to reconstruct the diagnostic-therapeutic cognitive logic of the regional school. Finally, a multi-agent collective-decision model is established and refined for the dominant diseases of the Sichuan school, capable of generating precise, individualised treatment regimens and thereby advancing an intelligent diagnostic-therapeutic paradigm that delivers more efficient and accurate clinical decision support.
3.Mechanisms on Chronicity of Infectious Diseases from Warm Disease Theory of Pathogen Invading Nutrient and Blood Aspects: Integrating Classical Wisdom with Innovative Perspectives
Baixue LI ; Hang ZHOU ; Jibin LIU ; Xia LI ; Xiyang LIU ; Haihui LIU ; Peijie WU ; Dong WANG ; Cen JIANG ; Wenjun WU ; Quansheng FENG
Chinese Journal of Experimental Traditional Medical Formulae 2026;32(14):60-69
The chronicity of infectious diseases is an important field in the collaborative research of traditional Chinese and Western medicine. The warm disease theory of pathogen invading nutrient and blood aspects in traditional Chinese medicine (TCM) takes the struggle between healthy Qi and pathogenic Qi and cementation of Yin as the core pathogenesis, providing a unique theoretical framework for explaining the common pathology of infectious chronic diseases. This theory originated from Yin-Yang interaction in the Internal Classic and was enriched with WU Youke's theory of intruding pathogen interacting and lingering in blood vessels and YE Tianshi's theory of long-term illness entering collaterals. Combining the theory with modern medical knowledge, our team has condensed the dynamic pathogenesis model of deficiency (nutrient and blood aspects) and excess (pathogen) interacting in the blood collaterals of Yin aspect, the core feature of which is the four-dimensional interactions of cause (pathogen characteristics), location (three Yin locations of diseases), nature (deficiency and excess), and potential (transmission trend). The common pathology of infectious chronic diseases is reflected in interactions. That is, the interactions between nutrient and blood deficiency (immune exhaustion and metabolic disorder) and pathogen excess (pathogen persistence and fibrous hyperplasia) in the liver collaterals (Jueyin), kidney collaterals (Shaoyin), lung collaterals (Taiyin) and other blood collaterals of Yin aspect form the pathological damage characterized by immune inflammatory response-continuous tissue damage with excessive repair. Taking the inheritance and innovative development of classics as the main line, this paper systematically discusses the scientific connotation of the theory of pathogen invading nutrient and blood aspects and the paths of inheritance and innovation and clarifies the original significance of this theory in the chronic development of infectious diseases. Furthermore, taking clinical diseases as an example, this paper reflects the guiding value of this classical theory in the modern diagnosis and treatment of infectious diseases with integrated traditional Chinese and Western medicine and the application potential of this theory in solving complex medical problems through the construction of the innovative paradigm of precise diagnosis and treatment with integrated traditional Chinese and Western medicine.
4.TCM Syndrome Distribution Patterns and Clinical Characteristics in Patients with Chronic Hepatitis B Comorbid with Metabolically Associated Fatty Liver Disease
Dingqi LI ; Liang HUANG ; Baixue LI ; Rui ZHAO ; Zhenglong ZHENG ; Yichen PENG ; Yu LIANG ; Caiying HE ; Jingdong CUI ; Zilin XIONG ; Xiyang LIU ; Quansheng FENG
Chinese Journal of Experimental Traditional Medical Formulae 2026;32(14):259-270
ObjectiveThis paper aims to investigate the distribution patterns of traditional Chinese medicine syndromes in patients with chronic hepatitis B (CHB) comorbid with metabolically associated fatty liver disease (MAFLD) and analyze their correlation with clinical characteristics and the progression of liver fibrosis. MethodsA cross-sectional study method was employed, and 506 patients with CHB comorbid with MAFLD who attended the Hepatology Outpatient Department of Public Health Clinical Center of Chengdu from June 2024 to December 2024 were enrolled. General information, traditional Chinese medicine syndromes information, laboratory indicators, and imaging examination results were collected using case report forms (CRF). Tongue images of patients were acquired using a tongue diagnosis instrument, and tongue feature parameters were extracted using computer image processing technology. Frequency analysis, factor analysis, and cluster analysis, and other methods were used to explore syndrome categories and distribution patterns. Non-parametric tests were used to compare the differences in clinical characteristics among different syndromes. Univariate and multivariate logistic regression analyses were performed to investigate the correlation between traditional Chinese medicine syndromes and the progression of liver fibrosis. ResultsThe main traditional Chinese medicine syndromes in patients with CHB comorbid with MAFLD were mainly dominated by damp-heat accumulation syndrome, liver stagnation and spleen deficiency syndrome, and phlegm-blood stasis syndrome, with damp-heat accumulation syndrome accounting for the highest proportion (41.89%). Compared with those without damp-heat accumulation syndrome, patients with damp-heat accumulation syndrome had significantly lower tongue proper H value, tongue coating H value, and tongue coating a* value (P<0.05), significantly higher tongue coating b* value (P<0.05), significantly increased levels of white blood cell (WBC), red blood cell (RBC), hemoglobin (HGB), and glucose (GLU), increased CAP values (P<0.05), a higher proportion of males (P<0.05), and a younger age (P<0.05). Univariate and multivariate logistic regression analyses show that age, hepatitis B surface antigen (HBsAg), diabetes, and damp-heat accumulation syndrome are independent risk factors for liver fibrosis (P<0.05), and that damp-heat accumulation syndrome is predominantly distributed in liver fibrosis stage F0-F1. ConclusionDamp-heat accumulation syndrome is a typical syndrome in patients with CHB comorbid with MAFLD, which is significantly associated with enhanced inflammatory response, metabolic disorders, and early liver fibrosis, and is a key link in disease progression. Clinical attention and early intervention are needed.
5.Molecular Characterization Network of Dampness-heat Syndrome in Patients with Chronic Hepatitis B Complicated by Glucose Metabolism Disorder Based on Shadowless Scleral Imaging and Metabolomics Technology
Caiying HE ; Hang ZHOU ; Yanqi CHI ; Baixue LI ; Liang HUANG ; Zhu CHEN ; Dafeng LIU ; Dong WANG
Chinese Journal of Experimental Traditional Medical Formulae 2026;32(14):271-285
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.
6.Multi-targeting Action Mechanism of Wenyang Xiaoyin Prescription on Doxorubicin-induced Mouse with Chronic Heart Failure Based on NF-κB/AVP-AQP2 Complex Pathway Mediated by Liver X Receptor
Baixue LI ; Junfeng ZHAO ; Song ZHANG ; Lei LIU ; Yangzhi PENG ; Hang ZHOU
Chinese Journal of Experimental Traditional Medical Formulae 2026;32(14):286-297
ObjectiveThis study aims to investigate the therapeutic effects of Wenyang Xiaoyin Prescription (Linggui Zhugan Tang combined with Tingli Dazao Xiefei Tang) on a doxorubicin-induced mouse model of chronic heart failure (CHF). The multi-targeting action mechanism of the therapy is revealed, based on the arginine vasopressin (AVP)-vasopressin V2 receptor (V2R)-aquaporin 2 (AQP2) signaling pathway and nuclear transcription factor -κB (NF-κB) pathway mediated by the liver X receptor (LXR) in the heart, brain, and kidney tissue. MethodsCHF mouse models were established by using intraperitoneal injection of doxorubicin and subsequently divided into a blank control group, a model control group, Wenyang Xiaoyin Prescription groups (Linggui Zhugan decoction combined with Tingli Dazao Xiefei decoction) with various doses, a captopril group, and a combination group receiving both Wenyang Xiaoyin prescription (as before) and captopril. Cardiac function was assessed by using color Doppler echocardiography, while the levels of brain natriuretic peptide (BNP), AVP, and the renin-angiotensin-aldosterone system (RAAS) in the serum were measured via enzyme-linked immunosorbent assay (ELISA). Pathological changes and ventricular remodeling in ventricular tissues were evaluated through hematoxylin and eosin (HE) and Masson staining, and myocardial cell apoptosis of mice was assessed by using TdT-mediated dUTP Nick-End Labeling (TUNEL) staining. Western blot and real-time polymerase chain reaction (Real-time PCR) were employed to detect the protein and RNA expression levels of LXRα, nuclear factor kappa-light-chain-enhancer of activated B cells (NF-κB), tumor necrosis factor-α (TNF-α), inducible nitric oxide synthase (iNOS) in the cardiac tissue, LXRβ, AVP in the hypothalamus, and LXRβ, V2R, and AQP2 in the kidneys. Furthermore, immunohistochemistry was used to quantify AQP2-positive collecting ducts in renal tissues. ResultsThe Wenyang Xiaoyin prescription significantly enhanced cardiac function indicators in CHF mice, reducing levels of BNP, AVP, and RAAS in the serum. It also mitigated myocardial cell damage and fibrosis change. The Wenyang Xiaoyin prescription inhibited the expressions of NF-κB and its downstream targets TNF-α and iNOS and improved myocardial inflammatory response, cell apoptosis, and ventricular remodeling by upregulating the expression of LXRα in cardiac tissues. Concurrently, the Wenyang Xiaoyin prescription elevated LXRβ expression in the kidneys and hypothalamus while downregulating the expression levels of AVP, V2R, and AQP2, as well as water permeability in the collecting ducts, thereby alleviating cardiac load. ConclusionThe intervention of Wenyang Xiaoyin prescription demonstrates a significant therapeutic effect on CHF, and its role involves the multi-target effect mechanism of the AVP/V2R/AQP2 and NF-κB pathways mediated by the nuclear receptor LXR in the heart, brain, and kidney tissue.
7.Survival advantage of first-line chemoimmunotherapy combined with radiotherapy for advanced esophageal squamous cell carcinoma: A propensity score matching analysis
Peixin FENG ; Qing HOU ; Ningning YAO ; Wenjuan ZHANG ; Bochen SUN ; Wenxia NIU ; Anqi ZHAO ; Wenlu CHEN ; Baixue WU ; Yuying ZHOU ; Yiwen ZHANG ; Yu LIANG ; Xin CAO ; Wei BAI ; Jianting LIU ; Shuangping ZHANG ; Jianzhong CAO
Chinese Journal of Radiological Medicine and Protection 2025;45(8):766-773
Objective:To investigate the efficacy of radiotherapy in patients with advanced esophageal cancer receiving first-line chemoimmunotherapy.Methods:A retrospective analysis was conducted on the data of 137 patients with Stage Ⅳ esophageal squamous cell carcinoma (ESCC) treated at our hospital from January 2018 to May 2023. These patients were divided into two groups: a group treated with first-line chemoimmunotherapy combined with radiotherapy (chemoimmunotherapy + radiotherapy group, n = 43) and a group treated with only chemoimmunotherapy ( n = 94). Inverse probability of treatment weighting (IPTW) was applied to balance baseline characteristics between the groups. With overall survival (OS) and progression-free survival (PFS) as study endpoints, the survival data were analyzed using the Kaplan-Meier method, the log-rank test, and the Cox regression method. Results:Before calibration, the chemoimmunotherapy + radiotherapy group significantly outperformed the sole chemoimmunotherapy group in median PFS (13.6 months vs. 7.0 months; HR: 0.501, 95% CI: 0.309-0.811, P = 0.005). After calibration using the COX proportional-hazards model for age, gender, Eastern Cooperative Oncology Group (ECOG) performance status, smoking history, T/N/M stage, and tumor location, the chemoimmunotherapy + radiotherapy group still had significant advantages in PFS (14.7 months vs. 7.0 months; HR: 0.441, 95% CI: 0.261-0.745, P = 0.002). IPTW analysis further confirmed this trend (13.9 months vs. 7.0 months; HR: 0.492, 95% CI: 0.304-0.795, P < 0.001). Specifically, the median OS of the chemoimmunotherapy + radiotherapy group demonstrated significant improvement in all analyses: pre-calibration (29.5 months vs. 18.0 months; HR: 0.507, 95% CI: 0.297-0.867, P = 0.013), after calibration using the Cox model (27.5 months vs. 16.7 months; HR: 0.470, 95% CI: 0.266-0.830, P = 0.009), and after calibration using IPTW (29.5 months vs. 16.9 months; HR: 0.448, 95% CI: 0.262-0.764, P < 0.001). Conclusions:The combination of radiotherapy and first-line chemoimmunotherapy can significantly improve survival outcomes of patients with advanced ESCC, suggesting its potential as a standard treatment strategy.
8.Characterization of vaginal flora in pregnant women during the second trimester using 16S rRNA full-length gene sequencing
Yanmin CAO ; Haiyan LIU ; Yao DONG ; Zongguang LI ; Baixue HAN ; Mengting CAO ; Longnan PAN ; Hui KAN ; Yaxin LI ; Qing LI ; Anqun HU ; Yingjie ZHENG
Chinese Journal of Microbiology and Immunology 2025;45(10):869-880
Objective:To characterize the vaginal flora of pregnant women during the second trimester using full-length 16S rRNA sequencing.Methods:A total of 142 pregnant women were systematically sampled from a pregnancy cohort. Vaginal swabs were collected for full-length 16S rRNA gene sequencing,and bioinformatics analysis was performed to characterize the vaginal microbiota and identify associated influencing factors.Results:Among the 142 pregnant women,the most frequently detected species were Lactobacillus iners(83.10%,118/142)and Lactobacillus crispatus(49.30%,70/142). The majority of samples(90.85%,129/142)were classified as Lactobacillus-dominant vagitypes,with the Lactobacillus iners vagitype accounting for 48.59%(69/142)and the Lactobacillus crispatus vagitype accounting for 38.73%(55/142). The vaginal microbiota was clustered into five community state types(CSTs):Ⅰa,Ⅰb,Ⅲa,Ⅲb,and Ⅳ. The most prevalent CSTs were Lactobacillus iners-dominated CST-Ⅲ(51.41%,73/142)and Lactobacillus crispatus-dominated CST-Ⅰ(24.65%,35/142). No samples were classified as CST-Ⅱ or CST-Ⅴ. A significant negative correlation was observed between Lactobacill and vaginosis-associated bacteria. Age,alcohol consumption,smoking,and vaginal treatments showed significant associations or trends toward significance with various Alpha diversity indices. Vaginal douching was associated with CST clustering,while obstetric history(primiparity,previous miscarriage history)was associated with vagitype classification. However,no significant associations were identified between maternal baseline characteristics and Beta diversity indices. Conclusions:Full-length 16S rRNA gene sequencing reveals that the vaginal microbiota of pregnant women is dominated by Lactobacillus iners and Lactobacillus crispatus. Maternal age,lifestyle factors such as smoking and alcohol consumption,and obstetric history are significantly associated with variations in vaginal microbiota composition.
9.Survival advantage of first-line chemoimmunotherapy combined with radiotherapy for advanced esophageal squamous cell carcinoma: A propensity score matching analysis
Peixin FENG ; Qing HOU ; Ningning YAO ; Wenjuan ZHANG ; Bochen SUN ; Wenxia NIU ; Anqi ZHAO ; Wenlu CHEN ; Baixue WU ; Yuying ZHOU ; Yiwen ZHANG ; Yu LIANG ; Xin CAO ; Wei BAI ; Jianting LIU ; Shuangping ZHANG ; Jianzhong CAO
Chinese Journal of Radiological Medicine and Protection 2025;45(8):766-773
Objective:To investigate the efficacy of radiotherapy in patients with advanced esophageal cancer receiving first-line chemoimmunotherapy.Methods:A retrospective analysis was conducted on the data of 137 patients with Stage Ⅳ esophageal squamous cell carcinoma (ESCC) treated at our hospital from January 2018 to May 2023. These patients were divided into two groups: a group treated with first-line chemoimmunotherapy combined with radiotherapy (chemoimmunotherapy + radiotherapy group, n = 43) and a group treated with only chemoimmunotherapy ( n = 94). Inverse probability of treatment weighting (IPTW) was applied to balance baseline characteristics between the groups. With overall survival (OS) and progression-free survival (PFS) as study endpoints, the survival data were analyzed using the Kaplan-Meier method, the log-rank test, and the Cox regression method. Results:Before calibration, the chemoimmunotherapy + radiotherapy group significantly outperformed the sole chemoimmunotherapy group in median PFS (13.6 months vs. 7.0 months; HR: 0.501, 95% CI: 0.309-0.811, P = 0.005). After calibration using the COX proportional-hazards model for age, gender, Eastern Cooperative Oncology Group (ECOG) performance status, smoking history, T/N/M stage, and tumor location, the chemoimmunotherapy + radiotherapy group still had significant advantages in PFS (14.7 months vs. 7.0 months; HR: 0.441, 95% CI: 0.261-0.745, P = 0.002). IPTW analysis further confirmed this trend (13.9 months vs. 7.0 months; HR: 0.492, 95% CI: 0.304-0.795, P < 0.001). Specifically, the median OS of the chemoimmunotherapy + radiotherapy group demonstrated significant improvement in all analyses: pre-calibration (29.5 months vs. 18.0 months; HR: 0.507, 95% CI: 0.297-0.867, P = 0.013), after calibration using the Cox model (27.5 months vs. 16.7 months; HR: 0.470, 95% CI: 0.266-0.830, P = 0.009), and after calibration using IPTW (29.5 months vs. 16.9 months; HR: 0.448, 95% CI: 0.262-0.764, P < 0.001). Conclusions:The combination of radiotherapy and first-line chemoimmunotherapy can significantly improve survival outcomes of patients with advanced ESCC, suggesting its potential as a standard treatment strategy.
10.Characterization of vaginal flora in pregnant women during the second trimester using 16S rRNA full-length gene sequencing
Yanmin CAO ; Haiyan LIU ; Yao DONG ; Zongguang LI ; Baixue HAN ; Mengting CAO ; Longnan PAN ; Hui KAN ; Yaxin LI ; Qing LI ; Anqun HU ; Yingjie ZHENG
Chinese Journal of Microbiology and Immunology 2025;45(10):869-880
Objective:To characterize the vaginal flora of pregnant women during the second trimester using full-length 16S rRNA sequencing.Methods:A total of 142 pregnant women were systematically sampled from a pregnancy cohort. Vaginal swabs were collected for full-length 16S rRNA gene sequencing,and bioinformatics analysis was performed to characterize the vaginal microbiota and identify associated influencing factors.Results:Among the 142 pregnant women,the most frequently detected species were Lactobacillus iners(83.10%,118/142)and Lactobacillus crispatus(49.30%,70/142). The majority of samples(90.85%,129/142)were classified as Lactobacillus-dominant vagitypes,with the Lactobacillus iners vagitype accounting for 48.59%(69/142)and the Lactobacillus crispatus vagitype accounting for 38.73%(55/142). The vaginal microbiota was clustered into five community state types(CSTs):Ⅰa,Ⅰb,Ⅲa,Ⅲb,and Ⅳ. The most prevalent CSTs were Lactobacillus iners-dominated CST-Ⅲ(51.41%,73/142)and Lactobacillus crispatus-dominated CST-Ⅰ(24.65%,35/142). No samples were classified as CST-Ⅱ or CST-Ⅴ. A significant negative correlation was observed between Lactobacill and vaginosis-associated bacteria. Age,alcohol consumption,smoking,and vaginal treatments showed significant associations or trends toward significance with various Alpha diversity indices. Vaginal douching was associated with CST clustering,while obstetric history(primiparity,previous miscarriage history)was associated with vagitype classification. However,no significant associations were identified between maternal baseline characteristics and Beta diversity indices. Conclusions:Full-length 16S rRNA gene sequencing reveals that the vaginal microbiota of pregnant women is dominated by Lactobacillus iners and Lactobacillus crispatus. Maternal age,lifestyle factors such as smoking and alcohol consumption,and obstetric history are significantly associated with variations in vaginal microbiota composition.

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