1.Animal Model of Chronic Obstructive Pulmonary Disease and Intervention Effect of Traditional Chinese Medicine: A Review
Jiyu ZOU ; Lijian PANG ; Tianjiao WANG ; Ningzi ZANG ; Zhongxue ZHAO ; Yongming LIU ; Qi SI ; Tianya CAO ; Xuenan MA ; Ying WANG ; Jiaran WANG ; Xiaodong LYU
Chinese Journal of Experimental Traditional Medical Formulae 2026;32(3):294-303
Chronic obstructive pulmonary disease (COPD), as one of the three major causes of death, is a complex systemic disease with high prevalence, high mortality, high disability, frequent acute exacerbations, and a variety of pulmonary complications. The pathogenesis is complex. Western medicine has no effective specificity scheme for a complete cure. However, multiple-component and multiple-target characteristics of traditional Chinese medicine (TCM) demonstrate significant advantages in COPD treatment through multi-link, multi-pathway, and multi-mechanism intervention. Therefore, exploring the essence of COPD pathogenesis and discovering effective TCM treatment drugs through the application of TCM principles and prescriptions is a key focus of modern research. Animal models are of paramount importance in medical research. It is the first consideration to select appropriate animals, adopt reasonable modeling methods to replicate stable animal models that closely resemble the clinical manifestations and pathophysiological characteristics of COPD, and use appropriate evaluation methods to determine the success of COPD animal models in experimental research. The core of experimental research lies in observing the intervention effect of TCM on COPD animal models, exploring the specific pathways and regulatory mechanisms of TCM on COPD disease, and finding TCM monomers, single herbs, and TCM formulas with definite curative effects. At present, animal model research on COPD mainly involves model establishment, model evaluation, efficacy observation, mechanism exploration, and other aspects. In recent years, there has been no systematic organization, update, and reflection on the relevant research on TCM intervention in COPD animal models. This study reviewed the selection of animals for the COPD model, methods for establishing COPD animal models, model evaluation methods, and the intervention effects of TCM on COPD animal models. It aims to grasp the current research status and identify existing problems for further improvement, in order to provide evidence and support for scientific research and clinical treatment of COPD.
2.Animal Model of Chronic Obstructive Pulmonary Disease and Intervention Effect of Traditional Chinese Medicine: A Review
Jiyu ZOU ; Lijian PANG ; Tianjiao WANG ; Ningzi ZANG ; Zhongxue ZHAO ; Yongming LIU ; Qi SI ; Tianya CAO ; Xuenan MA ; Ying WANG ; Jiaran WANG ; Xiaodong LYU
Chinese Journal of Experimental Traditional Medical Formulae 2026;32(3):294-303
Chronic obstructive pulmonary disease (COPD), as one of the three major causes of death, is a complex systemic disease with high prevalence, high mortality, high disability, frequent acute exacerbations, and a variety of pulmonary complications. The pathogenesis is complex. Western medicine has no effective specificity scheme for a complete cure. However, multiple-component and multiple-target characteristics of traditional Chinese medicine (TCM) demonstrate significant advantages in COPD treatment through multi-link, multi-pathway, and multi-mechanism intervention. Therefore, exploring the essence of COPD pathogenesis and discovering effective TCM treatment drugs through the application of TCM principles and prescriptions is a key focus of modern research. Animal models are of paramount importance in medical research. It is the first consideration to select appropriate animals, adopt reasonable modeling methods to replicate stable animal models that closely resemble the clinical manifestations and pathophysiological characteristics of COPD, and use appropriate evaluation methods to determine the success of COPD animal models in experimental research. The core of experimental research lies in observing the intervention effect of TCM on COPD animal models, exploring the specific pathways and regulatory mechanisms of TCM on COPD disease, and finding TCM monomers, single herbs, and TCM formulas with definite curative effects. At present, animal model research on COPD mainly involves model establishment, model evaluation, efficacy observation, mechanism exploration, and other aspects. In recent years, there has been no systematic organization, update, and reflection on the relevant research on TCM intervention in COPD animal models. This study reviewed the selection of animals for the COPD model, methods for establishing COPD animal models, model evaluation methods, and the intervention effects of TCM on COPD animal models. It aims to grasp the current research status and identify existing problems for further improvement, in order to provide evidence and support for scientific research and clinical treatment of COPD.
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.Effect of target characteristics on prospective memory in patients with depressive disorder
Min CHEN ; Dongsheng LYU ; Zheng WANG ; You HOU
Sichuan Mental Health 2025;38(1):14-21
BackgroundMany studies have shown that patients with depressive disorder show impairments in prospective memory, while it is deemed necessary for facilitating their social reintegration, and the current research findings are inconsistent regarding the factors affecting prospective memory of patients with depressive disorder. ObjectiveTo explore the impact of target characteristics (emotional valence and salience) on prospective memory in patients with depressive disorder, so as to provide references for the training and recovery of prospective memory function in these patients. MethodsFrom January to December 2022, 53 patients with depressive disorder were recruited from the outpatient department of Inner Mongolia Autonomous Mental Health Center. Meanwhile, 45 healthy individuals were concurrently recruited from surrounding communities as control group. An experiment with a 2 (participant type: depressive disorder, healthy control) ×2 (target salience: salient, non-salient) ×3 (emotional valence: positive, neutral, negative) factorial design was conducted. The positive/neutral/negative emotional pictures from Chinese Affective Picture System (CAPS) were used for emotional stimulation. A dual-task experimental paradigm was adopted, and the response time and accuracy in prospective memory task and ongoing task were recorded for participants with different target characteristics. Results①In the prospective memory task, the main effect of participant type was statistically significant, with the depressive group showing lower accuracy (F=14.892, P<0.01) and longer response time (F=10.642, P=0.002) compared with control group. ② The main effect of target emotional valence on accuracy (F=7.575, P=0.001) and response time (F=3.196, P=0.044) in the prospective memory task was statistically significant. Simple effect analysis revealed that depressive group yielded a shorter response time and higher accuracy rate under negative conditions compared with positive and neutral conditions (P<0.05 or 0.01). ③ The main effect of target salience on accuracy (F=6.659, P=0.012) and response time (F=10.106, P=0.002) in the prospective memory task was also statistically significant, with higher accuracy and shorter response time for salient targets compared with non-salient targets. ConclusionPatients with depressive disorder demonstrate preferential attention to and processing of negative stimuli in prospective memory tasks, while increasing target salience may facilitate spontaneous processing of prospective memory task in patients with depressive disorder. [Funded by Inner Mongolia Health Commission Medical Health Science and Technology Project (number, 202202104)]
5.Mechanism of Zuoguiwan in Inhibiting Osteoclast Activation Induced by Breast Cancer via Regulating p38 MAPK/ERK Signaling Pathway
Jianjiang FU ; Yinlong MEI ; Junchao MA ; Xiaocui ZHU ; Wei WANG ; Hong LYU
Chinese Journal of Experimental Traditional Medical Formulae 2025;31(1):1-9
ObjectiveTo investigate the effects of Zuoguiwan on osteoclast activation induced by breast cancer and its mechanism. MethodsTo simulate breast cancer-induced osteoclastic bone metastasis, RAW264.7 cells were cultured in conditioned medium containing 50% supernatant of MDA-MB-231 breast cancer cells. The dosages of Zuoguiwan used in the experiment were sera containing 5% and 10% Zuoguiwan. Tartrate-resistant acid phosphatase (TRAP) staining was used to detect osteoclast activation. Enzyme-linked immunosorbent assay (ELISA) was used to measure Cathepsin K secretion from RAW264.7 cells. Real-time quantitative polymerase chain reaction (PCR) was used to detect the mRNA expression levels of osteocalcin (OCN) and bone sialoprotein (BSP). Immunoprecipitation was employed to detect the interaction between Runt-related transcription factor 2 (Runx2) and core binding factor β subunit (CBF-β). Western blot was used to assess the protein expression of Runx2, phosphorylated Runx2 (p-Runx2), extracellular signal-regulated kinases 1/2 (ERK1/2), p-ERK1/2, p38 mitogen-activated protein kinase (MAPK), p-p38 MAPK, and CBF-β. ResultsCompared with the blank group, the MDA-MB-231 cell supernatant group showed a significant increase in TRAP-positive cell counts and Cathepsin K secretion. Meanwhile, the expression levels of p-Runx2, Runx2-CBF-β interaction, BSP and OCN mRNA, p-p38 MAPK, and p-ERK1/2 proteins were significantly decreased (P<0.01). Compared with the MDA-MB-231 cell supernatant group, Zuoguiwan-containing sera significantly reduced TRAP-positive cell counts and Cathepsin K secretion (P<0.01), significantly increased p-Runx2, BSP and OCN mRNA expression, as well as p-p38 MAPK and p-ERK1/2 protein levels, and promoted the interaction between Runx2 and CBF-β (P<0.01). No significant change in Runx2 expression was observed. Compared to the blank group, the BVD-523 group showed significantly lower expression of p-p38 MAPK and p-ERK1/2 proteins (P<0.01). Compared with the BVD-523 group, both low and high concentration Zuoguiwan-containing sera groups showed significantly higher p-p38 MAPK expression (P<0.01), and the high concentration Zuoguiwan group also exhibited a significant increase in p-ERK1/2 expression (P<0.01), while no statistical difference was found in the low-dose group. ConclusionZuoguiwan inhibits osteoclast activation by inducing phosphorylation of the key transcriptional regulator Runx2 in intra-osteoclast bone formation, and this process is closely associated with the activation of the p38 MAPK/ERK signaling pathway.
6.Pathogenesis of Chronic Obstructive Pulmonary Disease and Modulating Effect of Traditional Chinese Medicine: A Review
Jiyu ZOU ; Tianjiao WANG ; Ningzi ZANG ; Yongming LIU ; Lijian PANG ; Linlin WANG ; Xiaodong LYU
Chinese Journal of Experimental Traditional Medical Formulae 2025;31(1):287-298
Chronic obstructive pulmonary disease (COPD), as a chronic respiratory disease that can be prevented and intervened but cannot be completely cured, has increasing incidence and mortality rates year by year, often complicated by one or more comorbidities. However, there is currently no specific treatment available. Therefore, the healthcare issues related to COPD are urgent and prominent. Traditional Chinese medicine (TCM) delays the progression of COPD through multiple mechanisms, pathways, and targets. As a result, exploring the pathogenesis of COPD and identifying TCM treatment approaches and effective prescriptions are key issues that urgently need to be addressed in clinical practice. In TCM, COPD is categorized into syndromes such as "cough", "asthma", and "lung distension". It is believed that the deficiency in the origin runs through the entire disease. When external pathogens invade, Qi becomes disordered, and phlegm and blood stasis begin to accumulate, leading to an excess condition in the manifestation. Modern medicine research on the pathogenesis of COPD mainly involves aspects such as inflammatory response, oxidative stress, autophagy imbalance, and aging. Studies have found that Chinese medicine monomers, single herbs, and compound prescriptions can improve COPD by inhibiting inflammation, reducing oxidative damage, correcting autophagy, and delaying aging. However, there is no study that intuitively organizes the various pathogenesis mechanisms of COPD and their interrelationships. At the same time, research on the therapeutic effects of TCM on COPD primarily focuses on exploring a single mechanism or pathway, without integrating multiple mechanisms, pathways, and targets. Additionally, there are very few studies that summarize the corresponding relationships between the various pathogenesis mechanisms of COPD and the regulatory effects and signaling pathways of Chinese medicine. This study, for the first time, combines the latest literature in China and abroad to explain the various pathogenesis mechanisms of COPD and their interrelationships using a combination of graphs, text, and tables. It also outlines the signaling pathways, targets, and mechanisms of Chinese medicine monomers, single herbs, and compound prescriptions in regulating COPD, in order to provide new ideas and strategies for the in-depth research and systematic treatment of COPD with TCM.
7.Clinical Comprehensive Evaluation of Guanxinjing Capsules in Treating Angina Pectoris of Coronary Heart Disease with Syndrome of Qi Deficiency and Blood Stasis in "6+1" Dimensions
Mengmeng WANG ; Xin CUI ; Jian LYU ; Yanming XIE ; Lianxin WANG
Chinese Journal of Experimental Traditional Medical Formulae 2025;31(2):120-128
ObjectiveTo systematically review the available studies about Guanxinjing capsules in treating angina pectoris of coronary heart disease (syndrome of Qi deficiency and blood stasis), evaluate the evidence quality and comprehensive value of Guanxinjing capsules in 6+1 dimensions involving 9 aspects, and clarify the clinical positioning and advantages of this medicine. MethodsA qualitative combined with quantitative evaluation method was adopted, involving clinical medicine, epidemiology, evidence-based medicine, and pharmacoeconomics. Through public data collection, questionnaire surveys, real-world data collection, and literature comprehensive evaluation, an evaluation system involving 9 aspects in 6+1 dimensions was constructed for Guanxinjing capsules. Experts assigned weights to the criterion layer and indicator layer, and the multi-criteria decision analysis (MCDA) model and CSC (V2.0) were employed to measure each dimension and reveal the clinical value of Guanxinjing capsules. Results①The evaluation results showed that Guanxinjing capsules are safe. According to the adverse reactions in the instructions, the systematic evaluation and meta-analysis of clinical safety, and the data collected by the National Center for Adverse Drug Reaction Monitoring, the adverse reactions of Guanxinjing capsules mainly include chest tightness, dyspnea, dizziness, and digestive system-related symptoms, with a standardized score of 0.75 points, which suggests good safety. ②The meta-analysis results suggest that according to the same efficacy standards, the effectiveness of Guanxinjing capsules alone and Guanxinjing capsules combined with conventional Western medicine or Chinese patent medicines is higher than that of conventional Western medicine or the Chinese patent medicine Shenshao capsules alone in treating coronary heart disease. The standardized score of effectiveness is 0.57, which indicates that the effectiveness still requires evidence support. ③With the individual disposable income in 2020 as the expected payment assumption threshold, compared with conventional treatment alone, combining Guanxinjing capsules with conventional treatment is cost-effective and economical for the patients with angina pectoris of coronary heart disease under certain conditions (higher than 106.91 yuan), which suggests good economy. ④At present, 3 patents for the invention of Guanxinjing capsules have been approved, covering multiple fields such as clinical innovation, service system innovation, and industrial development, which implies good innovation. ⑤In addition, the questionnaire surveys for medical staff involve five different dimensions, and the statistical scores and evaluation results show good suitability of Guanxinjing capsules. ⑥The reimbursement rate of Guanxinjing capsules by residents is high. The sampling survey results show that Guanxinjing capsules are fully equipped in hospitals across China and have good accessibility. ⑦Derived from the theory of activating blood and resolving stasis proposed by Wang Qingren, a famous physician in the Qing Dynasty, Guanxinjing capsules integrate multiple therapies such as replenishing Qi, nourishing Yin, and aromatic warming and unblocking. According to the analysis data in the "6+1" dimensions, the clinical comprehensive evaluation score of Guanxinjing capsules for angina pectoris of coronary heart disease (syndrome of Qi deficiency and blood stasis) was 0.73. ConclusionThe results of comprehensive evaluation of each dimension and clinical value suggest that Guanxinjing capsules in treating angina pectoris of coronary heart disease (syndrome of Qi deficiency and blood stasis) have sufficient clinical evidence, good safety, suitability, and accessibility. It is recommended that Guanxinjing capsules can be included in the documents of basic clinical medication management in accordance with the established procedure.
8.Clinical Observation of Modified Zhigancao Tang in Treating Patients with Liver and Kidney Deficiency of Parkinson's Disease and Its Effect on Neuronal Signal-related Proteins
Yifo WEI ; Furong LYU ; Jia YAO ; Guonian LI ; Xianyi LUO ; Meng LUO ; Zhengzheng WEN ; Qiuqi LI ; Yihan LIU ; Linlin YANG ; Rui ZUO ; Wenxin DANG ; Fang MI ; Xiaoyan WANG ; Zhigang CHEN ; Fan LIU
Chinese Journal of Experimental Traditional Medical Formulae 2025;31(4):166-173
ObjectiveMicrotube associated protein-2 (MAP-2), alpha-tubulin (α-tubulin), and synaptophysin (SYP) are important proteins in neuronal signal communication. This paper observed the effects of modified Zhigancao Tang on the expression of serum α-Synuclein (α-Syn) and its oligomers, MAP-2, α-tubulin, and SYP of patients with liver and kidney deficiency of Parkinson's disease (PD), analyzed their correlation, and evaluated the therapeutic effect of modified Zhigancao Tang in patients with liver and kidney deficiency of PD based on α-Syn transmission pathway mediated by neuronal communication in vivo. MethodsA total of 60 patients with PD who met the inclusion criteria were randomly divided into a treatment group (30 cases) and a control group (30 cases). Both groups were treated on the basis of PD medicine, and the treatment group was treated with modified Zhigancao Tang. Both groups were treated for 12 weeks. The changes in UPDRS score, TCM syndrome score, and expression of serum α-Syn and its oligomers, MAP-2, α-tubulin, and SYP were observed before and after 12 weeks of treatment in each group. The correlation between the above-mentioned serum biological indexes and the levels of serum α-Syn and its oligomers was analyzed. ResultsAfter treatment, the TCM syndrome score, UPDRS score, UPDRS-Ⅱ score, and UPDRS-Ⅲ score of the treatment group were significantly decreased (P<0.05, P<0.01). The UPDRS score, UPDRS-Ⅱ score, and UPDRS-Ⅲ scores in the treatment group were significantly decreased compared with those in the control group after treatment (P<0.05). After treatment, the total effective rate of the control group was 63.3% (19/30), and that of the treatment group was 86.7% (26/30). The clinical effect of the observation group was better than the control group (Z=-2.03, P<0.05). The total effective rate of the observation group was better than that of the control group, and the difference was statistically significant (χ2=5.136, P<0.05). After treatment, the oligomer level of serum α-Syn and MAP-2 level in the treatment group were significantly decreased (P<0.05, P<0.01). The levels of serum α-Syn and its oligomers, as well as α-tubulin in the treatment group, were significantly decreased compared with those in the control group after treatment (P<0.05, P<0.01). Serum α-Syn was correlated with serum MAP-2 and α-Syn oligomer in patients with PD (P<0.05, P<0.01) but not correlated with serum SYP . Serum α-Syn oligomers of patients with PD were correlated with serum MAP-2 and α-tubulin (P<0.05, P<0.01) but not correlated with serum SYP level. Serum SYP of patients with PD was correlated with serum MAP-2 (P<0.05). ConclusionModified Zhigancao Tang has a therapeutic effect on patients with liver and kidney deficiency of PD by inhibiting the production of α-Syn oligomers and intervening α-Syn microtubule transport pathway in vivo.
9.Textual Research of Key Information of Classic Formula Xieqingwan Based on Ancient and Modern Literature
Yujie CHANG ; Lyuyuan LIANG ; Jialei CAO ; Xinghang LYU ; Wenxi WEI ; Xiaofang WANG ; Huizhen ZHANG ; Sai REN ; Mengqi WANG ; Bingqi WEI ; Bingxiang MA
Chinese Journal of Experimental Traditional Medical Formulae 2025;31(4):226-234
ObjectiveThis paper aims to systematically collect and organize ancient and modern clauses and studies containing Xieqingwan, excavate and analyze the key information of Xieqingwan, and provide a reference for facilitating the development of the classic formula Xieqingwan. MethodsThe composition, dosage, decocting methods, usage, and other key information of Xieqingwan in ancient traditional Chinese medicine books were collected and analyzed by means of literature research and metrological methods. The modern clinical application of Xieqingwan was summarized. ResultsA total of 42 pieces of effective data involving 32 ancient traditional Chinese medicine books were collected. Xieqingwan was first recorded in Xiaoer Yaozheng Zhijue. The drug origin of this formula is basically clear in the ancient traditional Chinese medicine books. The modern drug usage and decocting method were as follows: Angelicae Sinensis Radix, Gentianae Radix et Rhizoma, Chuanxiong Rhizoma, Gardenia seeds, Radix et Rhizoma Rhei, Notopterygii Rhizoma et Radix, and Saposhnikoviae Radix were grounded to fine powder, decocted with honey, and finally formed into pills with the size of a chicken head (1.5 g). It was suggested that half a pill or one pill were taken for one dose with warm Lophatheri decoction and sugar. The indications and clinical application had developed from the recordings in Xiaoer Yaozheng Zhijue and evolved from pediatrics to ophthalmic otolaryngology, neurology, dermatology, digestion, and respiratory diseases. The main pathogenesis of these diseases is heat in the liver meridian and is treated. The effect of Xieqingwan is "clearing away heat and toxicity, removing fire and relaxing the bowels, and dispersing swelling and relieving pain". It is recommended to use the corresponding preparation methods in the 2020 Edition of Pharmacopoeia of the People's Republic of China. Modern clinical studies are centered around the clinical application of Xieqingwan, which is often modified and used in treating Tourette syndrome, herpes, febrile convulsion, sleepwalking, and insomnia. ConclusionThis paper conducts a thorough textual research of the key information of Xieqingwan, induces its historic evolution, and confirms its key information, so as to provide a reference for the future development of Xieqingwan.
10.Analysis of risk factors for post-prematurity respiratory disease in very preterm infants
You YOU ; Jingwen LYU ; Lin ZHOU ; Liping WANG ; Jufeng ZHANG ; Li WANG ; Yongjun ZHANG ; Hongping XIA
Chinese Journal of Pediatrics 2025;63(1):50-54
Objective:To investigate the risk factors associated with post-prematurity respiratory disease (PPRD) in very preterm infants.Methods:A prospective cohort study was conducted, enrolling 369 very preterm infants who were admitted to the neonatal intensive care unit of Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, within one week of birth from January 2019 to June 2023. Data on maternal and infant clinical characteristics, neonatal morbidities, and treatments during hospitalization were collected. The very preterm infants were divided into 2 groups based on whether they developed PPRD. Continuous variables were compared using Mann-Whitney U test, while categorical variables were compared using χ2 tests or continuity correction χ2 test. Multivariate Logistic regression analysis was used to identify the independent risk factors for PPRD in very preterm infants. Results:Among the 369 very preterm infants, 217 cases(58.8%) were male, with a gestational age of 30 (28, 31) weeks at birth and a birth weight of 1 320 (1 085, 1 590) g. Of these, 116 cases (31.4%) developed PPRD, while 253 cases (68.6%) did not. The very preterm infants in the PPRD group had a lower gestational age and lower birth weight (both, P<0.001). The PPRD group also had a higher proportion of males, lower Apgar scores at the 1 th minute after birth and the 5 th minutes after birth, a higher rate of born via cesarean delivery, and a higher incidence of bronchopulmonary dysplasia, more pulmonary surfactant treatment, longer durations of mechanical ventilation, longer total oxygen therapy, and lower Z-score for weight at discharge (all P<0.05). Multivariate Logistic regression analysis showed that gestational age ( OR=0.85, 95% CI 0.73-0.99, P=0.037), born via cesarean delivery ( OR=2.23, 95% CI 1.21-4.10, P=0.010), a duration of mechanical ventilation ≥7 days ( OR=2.51, 95% CI 1.43-4.39, P=0.001), and a Z-score for weight at discharge ( OR=0.82, 95% CI 0.67-0.99, P=0.040) were all independent risk factors for PPRD in very preterm infants. Conclusion:Very preterm infants with a small gestational age, born via cesarean section, mechanical ventilation ≥7 days, and a low Z-score for weight at discharge should be closely monitored for PPRD, and provided with standardized respiratory management after discharge.

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