1.Quercetin Ameliorates Gouty Arthritis in Rats via ROS/NLRP3/IL-1β Signaling Pathway
Baowei FENG ; Yan WANG ; Chang LI ; Yujing ZHANG ; Dingxing FAN ; Xin LI
Chinese Journal of Experimental Traditional Medical Formulae 2026;32(2):145-153
ObjectiveTo investigate the effect of quercetin on acute gouty arthritis (GA) in rats by inhibiting the reactive oxygen species (ROS)/NOD-like receptor protein 3 (NLRP3)/interleukin-1β (IL-1β) signaling pathway. MethodsSixty SPF-grade male SD rats were randomized into normal, model, colchicine (0.3 mg·kg-1), and low-, medium-, and high-dose (25, 50, 100 mg·kg-1, respectively) quercetin groups (n=10). The rats in the dosing groups were administrated with the corresponding drugs (10 mL·kg-1) by gavage once a day for one week. An equal volume of normal saline was given by gavage to rats in normal and model groups. One hour after drug administration on day 5, an acute GA model was established in other groups except the control group via intra-articular injection of monosodium urate (MSU) suspension into the right posterior ankle joint cavity. The joint swelling and gait were scored at the time points of 6, 12, 24, 48 h after modeling. Histopathological alterations in the ankle joint tissue from each group were assessed by hematoxylin-eosin (HE) staining. Malondialdehyde (MDA), xanthine oxidase (XOD), and total superoxide dismutase (T-SOD) assay kits were used to assess the levels of MDA, XOD, and T-SOD in the serum. The levels of tumor interleukin-6 (IL-6), necrosis factor-α (TNF-α), and IL-1β in the rat serum, as well as ROS in the ankle joint tissue, were measured by enzyme-linked immunosorbent assay (ELISA). Western blot was performed to determine the protein levels of NLRP3, thioredoxin-interacting protein (TXNIP), apoptosis-associated speck-like protein containing a CARD domain (ASC), precursor cysteinyl aspartate-specific proteinase-1 (pro-Caspase-1), cleaved Caspase-1 (Caspase-1 p20), and IL-1β in the ankle joint tissue. Real-time PCR was employed to assess the mRNA levels of TXNIP, NLRP3, ASC, IL-1β, and TNF-α in the ankle joint tissue. ResultsCompared with the normal group, the model group exhibited decreased spontaneous activity, mental fatigue, increased ankle joint swelling and gait scores (P<0.01), aggravated synovial tissue edema and inflammatory cell infiltration (P<0.01), elevated levels of XOD, MDA, TNF-α, IL-1β, and IL-6 in the serum and ROS in the joint tissue (P<0.01), a declined level of T-SOD (P<0.01), up-regulated protein levels of NLRP3, TXNIP, ASC, pro-Caspase-1, Caspase-1 p20, and IL-1β in the ankle joint tissue (P<0.01), and up-regulated mRNA levels of NLRP3, TXNIP, ASC, IL-1β, and TNF-α in the ankle joint tissue (P<0.01). Compared with the model group, the medium- and high-dose quercetin groups showed improved general conditions, decreased gait scores (P<0.05, P<0.01), reduced joint swelling (P<0.01), alleviated synovial tissue edema and inflammatory cell infiltration (P<0.05, P<0.01), lowered levels of XOD, MDA, TNF-α, IL-1β, and IL-6 in the serum and ROS in the joint tissue (P<0.01), increased levels of T-SOD (P<0.01), down-regulated protein levels of TXNIP, NLRP3, ASC, pro-Caspase-1, Caspase-1 p20, and IL-1β in the ankle joint tissue (P<0.05, P<0.01), and down-regulated mRNA levels of TXNIP, NLRP3, ASC, IL-1β, and TNF-α in the ankle joint tissue (P<0.01). Low-dose quercetin also ameliorated some of the above parameters (P<0.05, P<0.01). ConclusionQuercetin exerts anti-GA effects by blocking the ROS/NLRP3/IL-1β signaling pathway, downregulating NLRP3 inflammasome activation, and inhibiting the production of pro-inflammatory cytokines including TNF-α, IL-1β, and IL-6.
2.Sanren Runchang Formula Regulates Brain-gut Axis to Treat IBS-C: A Randomized Controlled Trial
Teng LI ; Xinrong FAN ; He YAN ; Zhuozhi GONG ; Mengxi YAO ; Na YANG ; Yuhan WANG ; Huikai HU ; Wei WEI ; Tao LIU
Chinese Journal of Experimental Traditional Medical Formulae 2026;32(2):154-161
ObjectiveTo observe the clinical efficacy of Sanren Runchang formula in treating constipation-predominant irritable bowel syndrome (IBS-C) by regulating the brain-gut axis and the effects of the formula on serum levels of 5-hydroxytryptamine (5-HT), vasoactive intestinal peptide (VIP), and substance P (SP). MethodsA randomized controlled design was adopted, and 72 IBS-C patients meeting Rome Ⅳ criteria were randomized into observation and control groups (36 cases).The observation group received Sanren Runchang formula granules twice daily, and the control group received lactulose oral solution daily for 4 weeks. IBS Symptom Severity Scale (IBS-SSS), IBS Quality of Life Scale (IBS-QOL), and Bristol Stool Form Scale (BSFS) were used to assess clinical symptoms, and bowel movement frequency was recorded. The Self-Rating Anxiety Scale (SAS) and Self-Rating Depression Scale (SDS) were employed to evaluate psychological status. ELISA was employed to measure the serum levels of 5-HT, VIP, and SP. ResultsThe total response rate in the observation group was 91.67% (33/36), which was higher than that (77.78%, 28/36) in the control group (χ2=4.50, P<0.05). After treatment, both groups showed increased defecation frequency and BSFS scores, decreased IBS-SSS total score, abdominal pain and bloating scores, IBS-QOL health anxiety, anxiety, food avoidance, and behavioral disorders scores, SAS and SDS scores, serum 5-HT and VIP levels, and increased SP levels (P<0.05, P<0.01). Moreover, the observation group showed more significant changes in the indicators above than the control group (P<0.05, P<0.01). The SP level showed no significant difference between the two groups. During the 4-week follow-up, the recurrence rate was 5.88% in the observation group and 31.25% in the control group. No adverse events occurred in observation group, and 2 cases of mild diarrhea occurred in the control group. ConclusionSanren Runchang formula demonstrated definitive efficacy in alleviating gastrointestinal symptoms and improving the psychological status and quality of life in IBS-C patients, with a low recurrence rate. The formula can regulate serum levels of neurotransmitters such as 5-HT and VIP, suggesting its potential regulatory effect on the brain-gut axis through modulating neurotransmitters and neuropeptides. However, its complete mechanism of action requires further investigation through detection of additional brain-gut axis-related biomarkers.
3.Treatment Principles and Paradigm of Diabetic Microvascular Complications Responding Specifically to Traditional Chinese Medicine
Anzhu WANG ; Xing HANG ; Lili ZHANG ; Xiaorong ZHU ; Dantao PENG ; Ying FAN ; Min ZHANG ; Wenliang LYU ; Guoliang ZHANG ; Xiai WU ; Jia MI ; Jiaxing TIAN ; Wei ZHANG ; Han WANG ; Yuan XU ; .LI PINGPING ; Zhenyu WANG ; Ying ZHANG ; Dongmei SUN ; Yi HE ; Mei MO ; Xiaoxiao ZHANG ; Linhua ZHAO
Chinese Journal of Experimental Traditional Medical Formulae 2026;32(5):272-279
To explore the advantages of traditional Chinese medicine (TCM) and integrative TCM-Western medicine approaches in the treatment of diabetic microvascular complications (DMC), refine key pathophysiological insights and treatment principles, and promote academic innovation and strategic research planning in the prevention and treatment of DMC. The 38th session of the Expert Salon on Diseases Responding Specifically to Traditional Chinese Medicine, hosted by the China Association of Chinese Medicine, was held in Beijing, 2024. Experts in TCM, Western medicine, and interdisciplinary fields convened to conduct a systematic discussion on the pathogenesis, diagnostic and treatment challenges, and mechanism research related to DMC, ultimately forming a consensus on key directions. Four major research recommendations were proposed. The first is addressing clinical bottlenecks in the prevention and control of DMC by optimizing TCM-based evidence evaluation systems. The second is refining TCM core pathogenesis across DMC stages and establishing corresponding "disease-pattern-time" framework. The third is innovating mechanism research strategies to facilitate a shift from holistic regulation to targeted intervention in TCM. The fourth is advancing interdisciplinary collaboration to enhance the role of TCM in new drug development, research prioritization, and guideline formulation. TCM and integrative approaches offer distinct advantages in managing DMC. With a focus on the diseases responding specifically to TCM, strengthening evidence-based support and mechanism interpretation and promoting the integration of clinical care and research innovation will provide strong momentum for the modernization of TCM and the advancement of national health strategies.
4.Analysis of the disease burden of hypertensive heart disease among individuals aged≥60 years globally and in China from 1990 to 2021
Jiali LI ; Chunzhen REN ; Fan LIU ; Keyan WANG ; Zhijiang BI ; Xiaoxiao ZHAO ; Lixin KE ; Haibo WANG ; Wenxi PENG ; Zhifei WANG ; Qiang ZHANG ; Peng XU ; Yingdong LI ; Xiuxiu DENG ; Xinke ZHAO ; Cuncun LU
Chinese Journal of Clinical Thoracic and Cardiovascular Surgery 2026;33(02):281-290
Objective To systematically analyze the characteristics of the disease burden of hypertensive heart disease (HHD) in the elderly (≥60 years) globally and in China from 1990 to 2021, and to predict its future trends from 2022 to 2040, with the aim of providing data support for optimizing comprehensive prevention and control strategies for HHD. Methods Based on the Global Burden of Disease (GBD) 2021 database, the number of prevalent cases and disability-adjusted life years (DALYs) of HHD in the elderly were extracted for the world, China, and five regions categorized by sociodemographic index (SDI). Joinpoint regression was used to analyze the temporal trends of age-standardized prevalence rate and age-standardized DALYs rate of HHD in the elderly. A three-factor decomposition method was applied to evaluate the relative contributions of aging, population growth, and epidemiological changes to the variations in the elderly HHD burden. Additionally, a Bayesian age-period-cohort model was used to predict the elderly HHD burden from 2022 to 2040. Results In 2021, the number of prevalent elderly HHD cases reached 10 283 000 globally and 3 412 400 in China, representing increases of 179.20% and 159.20% respectively, compared with 1990. The DALYs of elderly HHD were 18 812 700 person-years globally and 4 731 400 person-years in China, rising by 76.08% and 29.45% respectively from 1990. Meanwhile, the growth rates of the number of prevalent cases and DALYs of elderly HHD varied across different SDI regions. From 1990 to 2021, the age-standardized prevalence rate of elderly HHD in China, as well as the age-standardized DALYs rate of elderly HHD both globally and in China, showed significant downward trends (all average annual percentage changes<0, all P<0.001). In 2021, the 70-74 years age group accounted for the highest proportion of prevalent cases and DALYs of elderly HHD, both globally and in China. Decomposition analysis revealed that population growth was the dominant factor driving the increase in the elderly HHD burden across all regions. The prediction model results indicated that the number of prevalent cases and DALYs of elderly HHD would continue to rise globally and in China from 2022 to 2040, with the growth rate of the elderly HHD burden in China between 2021 and 2040 expected to exceed the global average. Conclusion Over the past 32 years, although the age-standardized disease rates of elderly HHD have mainly shown a downward trend globally and in China, the absolute number of the disease burden has increased substantially. The projection model indicates a continued upward trajectory, with the growth rate in China higher than the global average. Therefore, there is an urgent need to implement precise prevention and control strategies to effectively mitigate the disease burden of elderly HHD.
5.Modified Morrow procedure for the treatment of hypertrophic obstructive cardiomyopathy: A single-center retrospective study in 318 patients
Jie LI ; Fan WENG ; Nan CHEN ; Yongxin SUN ; Changfa GUO ; Chunsheng WANG ; Yi LIN ; Wenjun DING
Chinese Journal of Clinical Thoracic and Cardiovascular Surgery 2026;33(03):431-437
Objective To summarize the clinical efficacy of modified Morrow surgery in the treatment of hypertrophic obstructive cardiomyopathy. Methods A retrospective analysis was conducted on the clinical data of patients with hypertrophic obstructive cardiomyopathy treated with modified Morrow surgery at Zhongshan Hospital Affiliated to Fudan University from 2020 to 2023. Results A total of 318 patients were enrolled, including 156 males and 162 females, with an average age of (55.6±13.1) years. Preoperative echocardiography showed a mean interventricular septal thickness of (18.1±3.8) mm, peak left ventricular outflow tract pressure difference of (86.4±24.9) mm Hg. The surgery time was (162.3±51.0) min, extracorporeal circulation time was (80.9±31.0) min, and aortic occlusion time was (44.8±20.8) min. After the surgery, transesophageal echocardiography showed that the interventricular septal thickness was (11.0±1.8) mm and left ventricular outflow tract peak pressure difference was (9.4±5.1) mm Hg. The incidence rate of postoperative complete left bundle branch block was 45.3%, Ⅲ° atrioventricular block was 3.8%, and postoperative newly developed atrial fibrillation was 3.1%. The postoperative hospital stay was (6.6±4.9) days, and one perioperative death occurred, with a mortality rate of 0.3%. The follow-up time was (10.3±9.4) months, during which the transthoracic echocardiography revealed a ventricular septal thickness of (12.9±2.9) mm and a peak left ventricular outflow tract pressure difference of (13.9±10.0) mm Hg. Conclusion The modified Morrow procedure for the treatment of hypertrophic obstructive cardiomyopathy is safe and effective, with good results in the short and medium term.
6.Evaluation of the effectiveness of school-family-community comprehensive intervention on sugar sweetened beverage consumption among primary and secondary school students
FAN Xiaomi, LI Jingling, XU Hao, ZHANG Yi, WANG Chenchen
Chinese Journal of School Health 2026;47(3):337-341
Objective:
To evaluate the effectiveness of school-family-community comprehensive intervention aimed at reducing sugar sweetened beverage(SSB) consumption among primary and secondary school students, so as to provide scientific basis for relevant departments to formulate campus sugar reduction measures for primary and secondary school students.
Methods:
In October 2023, a multi stage random cluster sampling method was used to select four primary schools (grade 4) and four junior high schools (grade 7) in Nanjing City, and they were randomly divided into the intervention group ( n =1 601) and the control group ( n = 1 433 ) (primary and secondary schools). The intervention group received a one year comprehensive intervention activity with the theme of “drinking less SSBs and enjoying a healthy life” for one consecutive year. The measures included the school conducting health education courses (once a month, 15 minutes each time), environmental support (posting promotional posters, changing them once a month), class bulletin board and interest projects (once a semester); interventions for families included conducting parent lectures (once per semester 30 min each time), new media (once a month) and hand in hand activities (once per semester); community carried out square promotion and create a supportive environment (post promotional posters and replace them once a month). The control group did not receive any intervention measures except regular health education classes. Self administered questionnaires were used to collect knowledge, attitudes, and intake of SSB at the baseline and after the intervention among primary and secondary school students.
Results:
After the intervention, the proportion of students in the intervention group with an SSB related knowledge awareness rate of 60% or above was 91.4%, which was higher than that of the control group (81.9%) ( χ 2=60.35, P < 0.01 ). The reporting rate of the behavior of choosing to drink beverages when thirsty in the intervention group was 25.4%, which was lower than that of the control group (33.3%); the reporting rates of informing parents about the hazards of sugar sweetened beverages and paying attention to nutrition labels were 62.0% and 78.0% respectively, both of which were higher than those of the control group (52.3%, 65.9%); the reporting rate of having sugar sweetened beverages at home frequently was 43.7% in the intervention group, which was lower than that of the control group (62.3%); the reporting rate of parents restricting the consumption of sugar sweetened beverages was 84.1%, which was higher than that of the control group (78.4%) ( χ 2= 22.66, 29.05, 54.40, 104.84, 16.24, all P <0.05). The reporting rate of students in the intervention group who consumed sugar sweetened beverages more than 4 times per week was 21.5%, which was lower than that of the control group (28.6%), and the difference was statistically significant ( χ 2=20.36, P <0.01).
Conclusion
The comprehensive intervention of school-family-community can effectively improve primary and secondary school students knowledge and attitudes regarding SSBs and reduce their consumption of these beverages.
7.Study on Reducing Hepatotoxicity and Retaining Anti-osteoporosis Activity of Psoraleae Fructus Though Salt Processing Based on Zebrafish
Yiqi LIU ; Xuan WANG ; Qiqi FAN ; Zehua CHANG ; Shuo FAN ; Na WANG ; Zheng LI ; Xinfang XU ; Chongjun ZHAO ; Xiangri LI
Chinese Journal of Experimental Traditional Medical Formulae 2026;32(9):79-90
ObjectiveTo investigate the mechanism of salt processing of Psoraleae Fructus (PF) through modern analytical techniques and biotechnology, focusing on its effects related to hepatotoxicity and anti-osteoporosis activity. MethodsThe zebrafish model was utilized to evaluate the impact of PF and salt-processed Psoraleae Fructus (SPF) on the hepatotoxicity (using 134.17 , 178.89, 268.34 mg·L-1 as low, medium, and high dose groups of PF, 135.04, 180.06, 270.08 mg·L-1 as low, medium, and high dose groups of SPF, respectively) and anti-osteoporotic activity (using 33.54 , 67.08 and 134.17 mg·L-1 as low, medium, and high dose groups of PF, 33.76, 67.52, 135.04 mg·L-1 as low, medium, and high dose groups of SPF, respectively), which was using alizarin red skull staining of zebrafish as an indicator of different batches of PF. The specific dosage of a batch of PF was taken as an example. Then ultra-performance liquid chromatography-quadrupole-time of flight-mass spectrometry(UPLC-Q-TOF-MS) analysis was employed to identify the chemical composition of PF before and after salt processing, and PCA, OPLS-DA, and independent sample t-test were used to elucidating the compositional changes associated with the effects of salt processing on hepatotoxicity and anti-osteoporosis activity. ResultsUnder specific conditions, PF induced notable hepatotoxicity in zebrafish while simultaneously demonstrating protective effect against prednisolone-induced osteoporosis. In comparison to PF, SPF showed alleviated hepatotoxicity while retaining significant anti-osteoporosis activity. UPLC-Q-TOF-MS analysis revealed that after salt processing, the overall chemical composition of PF showed a downward trend, with 69 components showing a decrease in content, represented by psoralen, and 13 components showing an increase, represented by 4′-O-methyl psoralen B. Further multivariate statistical analysis revealed 11 key differential components before and after salt processing of PF, including psoralen and bakuchiol. ConclusionSalt processing effectively diminishes hepatotoxicity without impairing therapeutic efficacy against osteoporosis of PF, which may be related to the compositional changes before and after salt processing of PF and provides key evidence to reveal the scientific significance of salt processing of PF.
8.Academic Characteristics of Contemporary Chinese Medicine Masters in Treating Diabetic Kidney Disease Based on SrTO
Yu SUN ; Xiaodan WANG ; Yingzi CUI ; Tianying CHANG ; Fan LI ; Lisha WANG ; Chenxuan DONG ; Shoulin ZHANG ; Xing LIAO
Chinese Journal of Experimental Traditional Medical Formulae 2026;32(10):258-269
ObjectiveTo explore the academic characteristics of contemporary renowned Chinese medicine masters in treating diabetic kidney disease (DKD) from the perspectives of principles, methods, formulas, and medications. MethodsIn strict accordance with the Systematic Review of Text and Opinion (SrTO) process developed by the Joanna Briggs Institute (JBI), an Australian evidence-based healthcare center, the databases including China National Knowledge Infrastructure (CNKI), VIP Database, Wanfang Data, and China Biomedical Literature Service System (SinoMed) were searched. Based on predefined inclusion and exclusion criteria, text information extraction, quality evaluation, and text information synthesis were conducted sequentially. The data were analyzed and presented in the form of text and figures. ResultsA total of 215 articles related to 43 contemporary renowned experts in the fields of Chinese medicine nephrology and endocrinology were included. The study found that the academic thoughts of these masters in the treatment of DKD are extensive, involving multiple levels such as disease understanding, therapeutic strategies, formula application, and medication use. In terms of disease understanding, the primary pathogenesis is characterized by deficiency in the root and excess in the manifestation. It is emphasized that internal factors, such as congenital endowment deficiency, interact with external factors such as improper diet, emotional disturbances, invasion of exogenous pathogens, and delayed or inappropriate treatment, to jointly induce the disease. This further gives rise to various pathogenetic theories, including obstruction of renal collaterals by blood stasis, toxin-induced damage to renal collaterals, latent wind disturbing the kidney, and internal heat leading to mass formation. In terms of therapeutic strategies and medication use, the principal treatment method is to replenish Qi and nourish Yin. Stage-based and syndrome-differentiated treatments are advocated. Flexible use of insect-derived drugs and wind-dispelling drugs is emphasized, along with proficiency in applying classical formulas and drug pairs. Integrated internal and external treatments, as well as the combined application of multiple therapeutic approaches, are commonly employed for comprehensive management. Meanwhile, the concept of "preventive treatment of disease" is upheld, and individualized long-term management of patients is advocated. ConclusionThrough the SrTO process, the academic thoughts of contemporary renowned Chinese medicine masters in the treatment of DKD have been systematically and standardly synthesized, providing a scientific and standardized basis for future theoretical exploration.
9.Academic Characteristics of Contemporary Chinese Medicine Masters in Treating Diabetic Kidney Disease Based on SrTO
Yu SUN ; Xiaodan WANG ; Yingzi CUI ; Tianying CHANG ; Fan LI ; Lisha WANG ; Chenxuan DONG ; Shoulin ZHANG ; Xing LIAO
Chinese Journal of Experimental Traditional Medical Formulae 2026;32(10):258-269
ObjectiveTo explore the academic characteristics of contemporary renowned Chinese medicine masters in treating diabetic kidney disease (DKD) from the perspectives of principles, methods, formulas, and medications. MethodsIn strict accordance with the Systematic Review of Text and Opinion (SrTO) process developed by the Joanna Briggs Institute (JBI), an Australian evidence-based healthcare center, the databases including China National Knowledge Infrastructure (CNKI), VIP Database, Wanfang Data, and China Biomedical Literature Service System (SinoMed) were searched. Based on predefined inclusion and exclusion criteria, text information extraction, quality evaluation, and text information synthesis were conducted sequentially. The data were analyzed and presented in the form of text and figures. ResultsA total of 215 articles related to 43 contemporary renowned experts in the fields of Chinese medicine nephrology and endocrinology were included. The study found that the academic thoughts of these masters in the treatment of DKD are extensive, involving multiple levels such as disease understanding, therapeutic strategies, formula application, and medication use. In terms of disease understanding, the primary pathogenesis is characterized by deficiency in the root and excess in the manifestation. It is emphasized that internal factors, such as congenital endowment deficiency, interact with external factors such as improper diet, emotional disturbances, invasion of exogenous pathogens, and delayed or inappropriate treatment, to jointly induce the disease. This further gives rise to various pathogenetic theories, including obstruction of renal collaterals by blood stasis, toxin-induced damage to renal collaterals, latent wind disturbing the kidney, and internal heat leading to mass formation. In terms of therapeutic strategies and medication use, the principal treatment method is to replenish Qi and nourish Yin. Stage-based and syndrome-differentiated treatments are advocated. Flexible use of insect-derived drugs and wind-dispelling drugs is emphasized, along with proficiency in applying classical formulas and drug pairs. Integrated internal and external treatments, as well as the combined application of multiple therapeutic approaches, are commonly employed for comprehensive management. Meanwhile, the concept of "preventive treatment of disease" is upheld, and individualized long-term management of patients is advocated. ConclusionThrough the SrTO process, the academic thoughts of contemporary renowned Chinese medicine masters in the treatment of DKD have been systematically and standardly synthesized, providing a scientific and standardized basis for future theoretical exploration.
10.Effect and Mechanisms of Bushen Tongluo Prescription on Pulmonary Fibrosis via Inhibiting Macrophage Polarization Through Wnt3a/β-catenin Signaling Pathway
Yanxia LIANG ; Xuelian YU ; Wenwen WANG ; Guangsen LI ; Hongfei XING ; Maorong FAN ; Bin YANG
Chinese Journal of Experimental Traditional Medical Formulae 2026;32(11):112-123
ObjectiveThis study aimed to investigate whether Bushen Tongluo prescription inhibits macrophage polarization by regulating the Wnt3a/β-catenin signaling pathway, thereby reducing epithelial-mesenchymal transition and excessive extracellular matrix deposition, in order to elucidate the anti-pulmonary fibrosis mechanisms of Bushen Tongluo prescription and provide a new theoretical basis for the clinical treatment of pulmonary fibrosis. MethodsFifty male Sprague-Dawley (SD) rats were randomly divided into a blank group, model group, pirfenidone group, and high- and low-dose Bushen Tongluo prescription groups. Except for the blank group, the pulmonary fibrosis model was established by intratracheal instillation of bleomycin. Intervention was initiated on day 28 after modeling. The high- and low-dose Bushen Tongluo prescription groups were administered Bushen Tongluo prescription at doses of 30.88, 15.44 g·kg-1, respectively, by intragastric gavage. The pirfenidone group was administered pirfenidone capsules at 110 mg·kg-1 by intragastric gavage. The blank and model groups were given an equal volume of normal saline by gavage, once daily for 90 days. After treatment, the level of transforming growth factor-β1 (TGF-β1) in bronchoalveolar lavage fluid (BALF) was detected by enzyme-linked immunosorbent assay (ELISA). Morphological changes in lung tissue and the collagen volume fraction were compared. The protein distribution and expression of E-cadherin, cytokeratin 19, α-smooth muscle actin (α-SMA), vimentin, collagen type Ⅰ (Col Ⅰ), and collagen type Ⅲ (Col Ⅲ) in lung tissue were detected by immunohistochemistry. The protein distribution and expression of CD68, arginase-1 (Arg-1), inducible nitric oxide synthase (iNOS), Wnt3a, and β-catenin in lung tissue were detected by immunofluorescence. The protein expression of Wnt3a and β-catenin in lung tissue was detected by Western blot, and the mRNA expression of Wnt3a and β-catenin was detected by Real-time fluorescence quantitative polymerase chain reaction (Real-time PCR). ResultsCompared with the blank group, a large number of inflammatory cells infiltrated the airway walls, alveolar spaces, and interstitial tissue in the model group, with obvious fibrous tissue hyperplasia. The level of TGF-β1 in BALF was significantly increased. The protein expression of E-cadherin and cytokeratin 19 in lung tissue was decreased, whereas the protein expression of α-SMA, Vimentin, Wnt3a, β-catenin, Col Ⅰ, and Col Ⅲ was increased. The fluorescence-positive area ratios of CD68, Arg-1, iNOS, Wnt3a, and β-catenin in lung tissue were increased. The protein and mRNA expression levels of Wnt3a and β-catenin in lung tissue were significantly increased (P<0.01). Compared with the model group, all treatment groups showed varying degrees of improvement in inflammatory cell infiltration and fibrous tissue hyperplasia in the airway walls, alveolar spaces, and interstitial tissue, decreased TGF-β1 levels in BALF, increased protein expression of E-cadherin and cytokeratin 19 in lung tissue, decreased protein expression of α-SMA, Vimentin, Col Ⅰ, and Col Ⅲ, decreased fluorescence-positive area ratios of CD68, Arg-1, iNOS, Wnt3a, and β-catenin in lung tissue, and decreased protein and mRNA expression levels of Wnt3a and β-catenin in lung tissue (P<0.05, P<0.01). ConclusionBushen Tongluo prescription can improve bleomycin-induced pulmonary fibrosis in rats by inhibiting epithelial-mesenchymal transition and reducing excessive extracellular matrix deposition. The mechanism may be related to inhibition of the Wnt3a/β-catenin signaling pathway and the macrophage polarization mediated by this pathway.


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