1.Study on the medication management in care transitions led by pharmacists in the United States and its implications
Xia LIU ; Qiuya YANG ; Mian ZHANG
China Pharmacy 2026;37(1):11-16
OBJECTIVE To provide references and suggestions for the establishment of medication management in care transitions in China. METHODS This study systematically reviewed the medication management in care transitions led by pharmacists in the United States, summarized the clinical practice evidence of its service system, personnel configuration, development bottlenecks and effect benefits, and explored the suggestions for optimizing the work in China. RESULTS & CONCLUSIONS The United States medication management in care transitions is characterized by standardized workflows and precision interventions. It focuses on the treatment continuity period when patients transition across institutions and stages, establishing a pharmacist-led, multidisciplinary collaborative monitoring system. Empirical studies confirm its effectiveness in reducing medication errors, lowering healthcare costs, and improving patient satisfaction. The United States model has achieved professionalization and standardization. Adapting its successful experiences as well as combining our local situation can establish a pharmacist-led medication management framework in care transitions through four key dimensions: role definition, training mechanisms, standardized protocols, and evaluation metrics, and improve the further development of pharmaceutical care services.
2.Impact of height-desk-chair matching intervention on viewing distance of primary school students
ZHANG Yaxin*, YAO Yuan, FENG Mian, WU Yuxuan, CHEN Guoping, TAO Fangbiao, XU Shaojun
Chinese Journal of School Health 2026;47(1):51-54
Objective:
To compare the effects of height-desk-chair matching on the viewing distance of primary school students before and after intervention, so as to provide scientific basis for the hygiene management of desks and chairs.
Methods:
From April to June 2025, a random cluster sampling method was used to select 141 third grade students from three classes equipped with adjustable desks and chairs in a primary school in Hefei City for a height-desk-chair matching intervention study. The height of students desks and chairs was adjusted according to the standard height and height range specified in the Functional Sizes and Technical Requirements of Chairs and Tables for Educational Institutions (GB/T 3976-2014), with an intervention period of one week. Before and after the intervention, eye use data were measured by using the electronic smart device "Cloud Clip", while collecting data on vision data viewing distance, time spent using eyes at close range and outdoor time, desk and chair height, and physical examination. Linear regression analysis was used to investigate the factors related to viewing distance before the intervention of height-desk-chair matching, and a paired t-test was used to analyze the difference in viewing distance before and after the intervention. A mixed effects model was used to explore the effect of height desk and chair adaptation intervention on viewing distance.
Results:
The compliance rates for desk and chair adjustments before and after the intervention were 1.4% and 18.4%, respectively, with a statistically significant difference ( χ 2=22.84, P <0.01). The viewing distance increased from (30.48±5.01) cm before intervention to (32.06±5.75) cm post intervention, with a statistically significant difference ( t=4.57, P <0.01). The proportion of students meeting the viewing distance standard increased from 33.3% to 51.1%. The linear mixedeffects model results indicated that the association between height appropriate desk and chair interventions and viewing distance was statistically significant, regardless of whether covariates such as time spent using eyes at close range and outdoor time were adjusted ( β=-1.58, 95%CI = -2.25 to -0.91; β=-1.14, 95%CI =-1.85 to -0.43, both P <0.05).
Conclusion
Height adjusted desks and chairs, which can effectively increase the viewing distance for primary school students, has positive implications for improving healthy eye care behaviors among children and adolescents.
3.Mechanism of Xianfang Huomingyin in Treating Type Ⅲ Prostatitis Based on Biological Analysis and Animal Experiments
Yuqin ZHANG ; Wenliang YAO ; Mian YE ; Yuliang ZHOU ; Shenghui CHEN
Chinese Journal of Experimental Traditional Medical Formulae 2026;32(6):62-71
ObjectiveTo explore the mechanism of Xianfang Huomingyin (XFHMY) in the treatment of type Ⅲ prostatitis (CP/CPPS) through network pharmacology, molecular docking, and animal experiments. MethodsThe traditional Chinese Medicine Systems Pharmacology Database and Analysis Platform (TCMSP) and the Swiss Target Prediction database were used to screen and sort out the active ingredients and corresponding targets of XFHMY. The potential therapeutic targets of CP/CPPS were collected from online databases, such as the Online Mendelian Inheritance in Man (OMIM), GeneCards, and DisGeNET. The potential core targets of XFHMY for treating CP/CPPS were further screened by constructing a protein-protein interaction (PPI) network and performing topological analysis. Meanwhile, the DAVID database was chosen to perform enrichment analysis on the intersection targets. On this basis, the AutoDock software was used for molecular docking, and the data was subsequently imported into the GraphPad Prism 8 software to generate a heat map. SD rats were divided into seven groups: A blank group, a sham operation group, a model group, low-, medium-, and high-dose XFHMY groups (3.645, 7.29, 14.58 g·kg-1), and a tamsulosin hydrochloride group (0.018 mg·kg-1). Hematoxylin-eosin (HE) staining was used to evaluate the pathological changes in prostate tissue. The inflammatory factor indicators of rats in each group were detected via enzyme-linked immunosorbent assay (ELISA). Real-time fluorescence quantitative reverse transcription polymerase chain reaction (Real-time PCR) and Western blot were used to evaluate the mRNA and protein expression levels of phosphatidylinositol 3-kinase (PI3K), protein kinase B (Akt), and nuclear transcription factor-κB (NF-κB) p65 in prostate tissue. ResultsThe HE staining showed no significant signs of inflammatory cell infiltration in the prostate of the sham operation group compared to the blank group, while the model group had significantly inflammatory cell infiltration. The ELISA results showed that compared to the blank group, TNF-α, IL-1β, and COX-2 in the sham operation group had no significant differences. However, they were significantly higher in the model group (P<0.01), indicating successful CP/CPPS modeling in rats. Compared with the model group, the low-,medium-and high-dose XFHMY group and the tamsulosin hydrochloride group showed significant decreases in TNF-α, IL-1β, and COX-2 (P<0.05,P<0.01). The Real-time PCR analysis revealed that compared to the model group, the low-dose XFHMY group had reduced Akt and NF-κB p65 mRNA expression(P<0.05,P<0.01). In the medium-and high-dose XFHMY group and tamsulosin hydrochloride group, PI3K, Akt, and NF-κB p65 mRNA levels decreased significantly(P<0.05,P<0.01). Western blot analysis showed that compared to the model group, the low-dose XFHMY group had lower p-NF-κB p65/NF-κB p65 (P<0.05). The medium- and high-dose XFHMY group and the tamsulosin hydrochloride group showed significant decreases in p-PI3K/PI3K, p-Akt-ser473/Akt, p-Akt-thr308/Akt, and p-NF-κB p65/NF-κB p65 (P<0.01). ConclusionXFHMY may exert therapeutic efficacy on CP/CPPS by inhibiting the PI3K/Akt/NF-κB signaling pathway and reducing inflammatory responses. Additionally, NF-κB activation may be related to the activation of ser473 and thr308 sites.
4.Specification for postoperative care and treatment after transcatheter aortic valve replacement
Peide ZHANG ; Yuxin FAN ; Mian XU ; Siyu LIU ; Guangzhi ZHAO ; Shuo CHANG
Chinese Journal of Clinical Thoracic and Cardiovascular Surgery 2025;32(09):1203-1208
Since the first successful transcatheter aortic valve replacement (TAVR) was performed globally in 2002, the TAVR technology has become increasingly mature. With more than a decade of development in China, its application experience, device research and development, procedural improvements, evidence-based medicine, and guideline updates have continuously progressed, leading to a significant increase in the number of procedures conducted. Compared to traditional surgical operations, TAVR has different postoperative monitoring points and principles for the prevention and management of complications, necessitating the formulation of corresponding monitoring and treatment protocols that align with the technical characteristics of the procedure. This guideline is based on clinical practice and incorporates both domestic and international literature as well as the experiences of Fuwai Hospital. It distills and organizes routine postoperative monitoring practices, process optimization, and complication management for TAVR, establishing a set of practical guidelines for postoperative monitoring in China. These guidelines have strong practical value for optimizing postoperative management strategies and preventing and managing complications, which is beneficial for early functional recovery of patients, shortening hospital stays, and reducing complication rates. They provide guidance and reference for domestic peers and support the standardized development and quality improvement of postoperative management for TAVR in China.
5.Mechanism of vanillic acid against cardiac fibrosis induced by isoproterenol in mice based on Drp1/HK1/NLRP3 and mitochondrial apoptosis signaling pathways.
Hai-Bo HE ; Mian WU ; Jie XU ; Qian-Qian XU ; Fang-Zhu WAN ; Hua-Qiao ZHONG ; Ji-Hong ZHANG ; Gang ZHOU ; Hui-Lin QIN ; Hao-Ran LI ; Hai-Ming TANG
China Journal of Chinese Materia Medica 2025;50(8):2193-2208
This study investigated the effects and underlying mechanisms of vanillic acid(VA) against cardiac fibrosis(CF) induced by isoproterenol(ISO) in mice. Male C57BL/6J mice were randomly divided into control group, VA group(100 mg·kg~(-1), ig), ISO group(10 mg·kg~(-1), sc), ISO + VA group(10 mg·kg~(-1), sc + 100 mg·kg~(-1), ig), ISO + dynamin-related protein 1(Drp1) inhibitor(Mdivi-1) group(10 mg·kg~(-1), sc + 50 mg·kg~(-1), ip), and ISO + VA + Mdivi-1 group(10 mg·kg~(-1), sc + 100 mg·kg~(-1), ig + 50 mg·kg~(-1), ip). The treatment groups received the corresponding medications once daily for 14 consecutive days. On the day after the last administration, cardiac functions were evaluated, and serum and cardiac tissue samples were collected. These samples were analyzed for serum aspartate aminotransferase(AST), lactate dehydrogenase(LDH), creatine kinase-MB(CK-MB), cardiac troponin I(cTnI), reactive oxygen species(ROS), interleukin(IL)-1β, IL-4, IL-6, IL-10, IL-18, and tumor necrosis factor-α(TNF-α) levels, as well as cardiac tissue catalase(CAT), glutathione(GSH), malondialdehyde(MDA), myeloperoxidase(MPO), superoxide dismutase(SOD), total antioxidant capacity(T-AOC) activities, and cytochrome C levels in mitochondria and cytoplasm. Hematoxylin-eosin, Masson, uranium acetate and lead citrate staining were used to observe morphological and mitochondrial ultrastructural changes in the cardiac tissues, and myocardial injury area and collagen volume fraction were calculated. Flow cytometry was applied to detect the relative content and M1/M2 polarization of cardiac macrophages. The mRNA expression levels of macrophage polarization markers [CD86, CD206, arginase 1(Arg-1), inducible nitric oxide synthase(iNOS)], CF markers [type Ⅰ collagen(Coll Ⅰ), Coll Ⅲ, α-smooth muscle actin(α-SMA)], and cytokines(IL-1β, IL-4, IL-6, IL-10, IL-18, TNF-α) in cardiac tissues were determined by quantitative real-time PCR. Western blot was used to detect the protein expression levels of Coll Ⅰ, Coll Ⅲ, α-SMA, Drp1, p-Drp1, voltage-dependent anion channel(VDAC), hexokinase 1(HK1), NOD-like receptor protein 3(NLRP3), apoptosis-associated speck-like protein(ASC), caspase-1, cleaved-caspase-1, gasdermin D(GSDMD), cleaved N-terminal gasdermin D(GSDMD-N), IL-1β, IL-18, B-cell lymphoma-2(Bcl-2), B-cell lymphoma-xl(Bcl-xl), Bcl-2-associated death promoter(Bad), Bcl-2-associated X protein(Bax), apoptotic protease activating factor-1(Apaf-1), pro-caspase-3, cleaved-caspase-3, pro-caspase-9, cleaved-caspase-9, poly(ADP-ribose) polymerase-1(PARP-1), and cleaved-PARP-1 in cardiac tissues. The results showed that VA significantly improved cardiac function in mice with CF, reduced myocardial injury area and cardiac index, and decreased serum levels of AST, CK-MB, cTnI, LDH, ROS, IL-1β, IL-6, IL-18, and TNF-α. VA also lowered MDA and MPO levels, mRNA expressions of IL-1β, IL-6, IL-18, and TNF-α, and mRNA and protein expressions of Coll Ⅰ, Coll Ⅲ, and α-SMA in cardiac tissues, and increased serum levels of IL-4 and IL-10, cardiac tissue levels of CAT, GSH, SOD, and T-AOC, and mRNA expressions of IL-4 and IL-10. Additionally, VA ameliorated cardiac pathological damage, inhibited myocardial cell apoptosis, inflammatory infiltration, and collagen fiber deposition, reduced collagen volume fraction, and alleviated mitochondrial damage. VA decreased the ratio of F4/80~+CD86~+ M1 cells and the mRNA expressions of CD86 and iNOS in cardiac tissue, and increased the ratio of F4/80~+CD206~+ M2 cells and the mRNA expressions of CD206 and Arg-1. VA also reduced protein expressions of p-Drp1, VDAC, NLRP3, ASC, caspase-1, cleaved-caspase-1, GSDMD, GSDMD-N, IL-1β, IL-18, Bad, Bax, Apaf-1, cleaved-caspase-3, cleaved-caspase-9, cleaved-PARP-1, and cytoplasmic cytochrome C, and increased the expressions of HK1, Bcl-2, Bcl-xl, pro-caspase-3, pro-caspase-9 proteins, as well as the Bcl-2/Bax and Bcl-xl/Bad ratios and mitochondrial cytochrome C content. These results indicate that VA has a significant ameliorative effect on ISO-induced CF in mice, alleviates ISO-induced oxidative damage and inflammatory response, and its mechanism may be closely related to the inhibition of Drp1/HK1/NLRP3 and mitochondrial apoptosis signaling pathways, suppression of myocardial cell inflammatory infiltration and collagen fiber deposition, reduction of collagen volume fraction and CollⅠ, Coll Ⅲ, and α-SMA expressions, thus mitigating CF.
Animals
;
Isoproterenol/adverse effects*
;
Male
;
Mice
;
Signal Transduction/drug effects*
;
Vanillic Acid/administration & dosage*
;
Dynamins/genetics*
;
Mice, Inbred C57BL
;
Fibrosis/genetics*
;
Apoptosis/drug effects*
;
Mitochondria/metabolism*
;
NLR Family, Pyrin Domain-Containing 3 Protein/genetics*
;
Myocardium/metabolism*
;
Humans
6.Impact of sutureless dorsal venous complex combined with robotic-assisted laparoscopic prostatectomy on sexual function in patients with prostatic cancer.
Wei ZHENG ; Xin-Mian HUANG ; Xiao-Bo XU ; Ke-Bing YANG ; Xiao-Long QI ; Da-Hong ZHANG
National Journal of Andrology 2025;31(9):807-811
OBJECTIVE:
To evaluate the impact of sutureless approach to the dorsal venous complex (DVC) combined with robotic-assisted laparoscopic prostatectomy on sexual function of patients with prostatic cancer.
METHODS:
This study included 114 prostate cancer patients who underwent robot-assisted laparoscopic radical prostatectomy at our hospital from January 2021 to January 2024. The patients were randomly divided into a control group (n=57) and an observation group (n=57). The control group received conventional "figure-of-eight" suture ligation of the dorsal venous complex (DVC), while the observation group underwent direct DVC transection using monopolar electrocautery scissors after increasing pneumoperitoneum pressure.Surgical duration, intraoperative blood loss, positive surgical margin rates, and positive apical margin rates were recorded. The continence rates and rates of morning erections at 1, 3 and 6 months after the operation were compared between groups. Sexual function was assessed pre-operatively and at 6 months post-operation by using the IIEF-5 and PEDT.
RESULTS:
The operative time in the observation group was significantly longer than that in the control group ([115.71 ± 19.42] min vs [103.42 ± 12.78] min, P<0.05). While no significant differences were observed in intraoperative blood loss, positive surgical margin rate, or positive apical margin rate between the two groups (P>0.05). At 3 and 6 months after the operation, the observation group exhibited higher urinary continence rates and morning erection recovery rates compared to the control group (P<0.05). Furthermore, at 6 months postoperatively, the observation group demonstrated significantly higher IIEF-5 scores and lower PEDT scores than those of control group(P<0.05).
CONCLUSION
The use of a sutureless DVC technique in robotic-assisted laparoscopic radical prostatectomy protects the post-operative sexual function in patients.
Humans
;
Male
;
Prostatectomy/methods*
;
Laparoscopy/methods*
;
Prostatic Neoplasms/surgery*
;
Robotic Surgical Procedures/methods*
;
Middle Aged
;
Operative Time
;
Aged
7.The protective effect of low-dose L-carnitine on the reproductive function of male Wistar rats during acute exposure to simulated high-altitude environment
Jiahao LI ; Bin ZHANG ; Xingming JIANG ; Zihan BU ; Mian WANG ; Forong LI ; Dehui CHANG
Journal of Chongqing Medical University 2025;50(4):437-443
Objective:To investigate the interventional and protective effect of low-dose L-carnitine(LC)against reproductive system damage in male Wistar rats during acute exposure to simulated high-altitude environment.Methods:A total of 24 specific pathogen-free male Wistar rats,aged 12 weeks,were randomly divided into control group,high-altitude model group,and LC intervention group[intraperitoneal injection of LC at a dose of 50 mg/(kg·d)],with 8 rats in each group.The rats in the control group were fed under normal conditions(at an altitude of approximately 1 500 m),those in the high-altitude model group,and those in the LC intervention group were fed in a hypobaric oxygen chamber(at a simulated alti-tude of 6 000 m).The rats were sacrificed after 3 days.The testis was collected to calculate testicular index;the semen was collected from the epididymis,and the Weili sperm quality analysis system was used to assess sperm quality;blood samples were collected from the abdominal aorta,and ELISA kits were used to measure the serum levels of testosterone(T),luteinizing hormone(LH),and follicle-stimulating hormone(FSH);testicular tissue samples were collected,and biochemical kits were used to measure the activity of reactive oxygen species(ROS),malondialdehyde(MDA),and superoxide dismutase(SOD);testicular tissue was collected to prepare HE and electron microscopy sections,and a light microscope and a transmission electron microscope were used for observation.Results:Com-pared with the blank control group,the high-altitude model group had significant increases in the levels of T,LH,and FSH(P<0.01),testicular tissue damage under the light microscope,and changes in the morphology of spermatogenic cells,including mitochondrial al-terations,membrane edema,loss of cristae,swelling of the matrix,and local dissolution,as well as significant increases in the levels of ROS and MDA(P<0.01)and a significant reduction in SOD activity(P<0.01).Compared with the high-altitude model group,the LC intervention group had a significant increase in the level of T(P<0.01),significant reductions in the levels of FSH and LH(P<0.01),and significant improvements in the pathological changes of testicular tissue,with no marked mitochondrial injury,and there were sig-nificant reductions in the levels of ROS and MDA(P<0.01)and a significant increase in SOD activity(P<0.01).There was no signifi-cant difference in testicular index between groups(P>0.05).The high-altitude model group had a significantly lower sperm count than the blank control group(P<0.05),while there was no significant difference in sperm count between the LC intervention group and the blank control group(P>0.05);there was no significant difference in sperm motility between groups(P>0.05).Conclusion:Low-dose LC can improve reproductive system damage in rats during acute exposure to simulated high-altitude environment,possibly by alleviat-ing oxidative stress response.
8.Prediction of early in-hospital major adverse events by D-dimer level in patients with acute type A aortic dissection: A retrospective cohort study
Yu WANG ; Xiaoqi WANG ; Heng ZHANG ; Xinyi ZHANG ; Mian XU ; Yi GUO ; Shuo CHANG
Chinese Journal of Clinical Thoracic and Cardiovascular Surgery 2025;32(11):1597-1602
Objective To investigate the association between D-dimer levels within 2 hours of admission and in-hospital major adverse events (MAEs) in patients with acute type A aortic dissection (ATAAD) who underwent total arch replacement combined with frozen elephant trunk (FET) implantation. Methods This retrospective study included patients with ATAAD who underwent total arch replacement with FET implantation at Fuwai Yunnan Cardiovascular Hospital from September 2017 to December 2022. Patients were divided into two groups based on the occurrence of in-hospital MAEs: a MAEs group and a non-MAEs group (control). Perioperative data were compared between the two groups. Univariate and multivariate logistic regression analyses were performed to identify risk factors for in-hospital MAEs, which included in-hospital death, gastrointestinal bleeding, paraplegia, acute kidney injury, low cardiac output syndrome, stroke, respiratory failure, multiple organ dysfunction syndrome, and severe infection. The predictive value of D-dimer was evaluated using the area under the receiver operating characteristic curve (AUC). Results A total of 218 patients were included (157 males, 61 females), with a mean age of (51.54±9.79) years. There were 152 patients in the non-MAEs group and 66 in the MAEs group. The overall incidence of in-hospital MAEs was 30.3%, and the in-hospital mortality rate was 2.8% (6/218). Compared to the non-MAEs group, the MAEs group had significantly higher levels of D-dimer and lactate, as well as longer cardiopulmonary bypass time, aortic cross-clamp time, and ICU length of stay (all P<0.05). Multivariate logistic regression analysis identified D-dimer as an independent risk factor for in-hospital MAEs [OR=1.077, 95%CI (1.020, 1.137), P=0.013]. The AUC for the D-dimer level within 2 hours of admission to predict in-hospital MAEs was 0.83 [95%CI (0.736, 0.870), P<0.001]. The optimal cutoff value was 2.2 μg/mL, with a sensitivity of 84.8% and a specificity of 73.0%. Conclusion The serum D-dimer level is an independent risk factor for in-hospital MAEs in patients with ATAAD following total arch replacement with FET implantation. D-dimer levels on admission can help clinicians optimize risk stratification and perioperative management, potentially reducing the incidence of early adverse events.
9.The therapeutic effects of TCDCA on cartilage degeneration in experimental temporomandibular joint os-teoarthritis in rats
Wanqiu HUO ; Mian ZHANG ; Qian LIU ; Dongmei WANG ; Meiqing WANG
Journal of Practical Stomatology 2024;40(2):198-203
Objective:To investigate the effects of the taurochenodeoxycholic acid(TCDCA)on cartilage degeneration in tem-poromandibular joint osteoarthritis(TMJ OA).Methods:36 female SD rats aged 6 weeks were randomly divided into 3 groups:con-trol group(CON),unilateral anterior crossbite group(UAC),UAC plus TCDCA injection group(UAC+TCDCA).UAC model was es-tablished in all rats in UAC and UAC+TCDCA groups.Samples were collected at 8 and 12 weeks(control group,UAC group,UAC+TCDCA group)after set up of the experiment(n=6),and TMJ morphological examination was performed.The expression of CYP7A1,BAAT and TGR5 in the tissue and cells was examined by immunohistochimical staining.Results:(1)Compared with the CON group of the same age,the cells in the condylar cartilage were disordered,the cartilage matrix was reduced and thinner in UAC group.Compared with UAC group of the same age,cell arrangement,cell number,cartilage matrix and cartilage thickness were im-proved in UAC+TCDCA group(P<0.05).(2)Compared with the CON group of the same age,the positive cells for TCDCA-specific receptor TGR5 and the key enzymes CYP7A1 and BAAT were mainly distributed in the anterior hypertrophic layer and hypertrophic layer at each time point.The number of positive cells in the UAC group was significantly reduced compared with the CON group.Conclusion:TCDCA has obvious therapeutic effects on the degeneration in TMJ OA.
10.Elastase quantitative analysis of elastin effect on mechanical response of anterior cruciate ligament
Wentian ZHANG ; Yuping DENG ; Xiaoyun LIU ; Caijuan LI ; Mian WANG ; Zeyu LIANG ; Liang XIONG ; Gang HUANG ; Guangxin CHEN ; Zitao LI ; Wenhua HUANG
Chinese Journal of Tissue Engineering Research 2024;28(22):3451-3456
BACKGROUND:The anterior cruciate ligament has unique nonlinear mechanical properties under a complex physiological loading environment.Elastin is an important contributor to the mechanical properties of the anterior cruciate ligament,but its mechanical response to the anterior cruciate ligament under axial tension is not clear. OBJECTIVE:To quantitatively analyze the effect of elastin on the tensile mechanical response of the anterior cruciate ligament. METHODS:Elastase solution and control buffer were prepared.The porcine anterior cruciate ligament samples were prepared into small-size samples and randomly soaked in 0,0.1,1.0,2.0,5.0,and 10.0 U/mL elastase solution for 6 hours,and other small samples of the same size were soaked in 2 U/mL elastase solution for 0,1,3,6,9,and 12 hours.To determine suitable soaking conditions for elastin-targeted enzymes and verify the digestive effect,histological staining was used to compare the effects of enzyme treatment on tissue structure and composition.The ligament samples were randomly divided into elastase-treated group and PBS group,and immersed in 2 U/mL elastase solution and PBS buffer for 6 hours,respectively.A mechanical tensile test was performed before and after immersion. RESULTS AND CONCLUSION:(1)The biochemical results showed that being treated in 2 U/mL elastase solution for 6 hours could reduce the elastin content by 31.1%,and had no significant effect on other mechanical-related components in the tissue.(2)The histological results showed that elastase was able to penetrate the tissue,and the loose degree of tissue increased after treatment.(3)In the mechanical results before and after treatment,the mechanical properties of the PBS group decreased significantly,only the low-tension elastic modulus increased significantly and the initial length increased significantly in the elastase-treated group.(4)The intergroup comparison results showed that there was no significant difference between the two groups in pre-treatment,but the low-tension elastic modulus,initial slopes,saturated slopes,and initial length of the elastase-treated group after treatment were significantly higher than those in the PBS group.(5)These results suggest that elastin degradation significantly affects the biomechanical properties of the anterior cruciate ligament and further complements our understanding of the structure-function relationship of the anterior cruciate ligament.


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