1.Correlation between the expression of circ-ATAD1,miR-140-3p in serum and the prognosis of cervical cancer patients
Ye FANG ; Lei GAO ; Zenghui LI ; Limin QI ; Yaci JIN ; Lijun WANG
International Journal of Laboratory Medicine 2025;46(8):926-930,936
Objective To analyze the correlation between serum circular RNA-ATAD1(circ-ATAD1)and microRNA-140-3p(miR-140-3p)expression and the prognosis of cervical cancer patients.Methods From March 2018 to March 2020,a total of 146 patients with cervical cancer(study group),146 patients with benign uterine lesions(benign uterine lesions group),and 146 healthy people who underwent the physical examina-tion(control group)in Cangzhou Hospital of Integrated TCM-WM·Hebei were selected as the research sub-jects.Real-time quantitative PCR was used to detect serum levels of miR-140-3p and circ-ATAD1.The Kap-lan-Meier method was used to analyze the correlation between serum circ-ATAD1 and miR-140-3p expression and the prognosis of cervical cancer patients.Multivariate Cox regression model was used to analyze the influ-encing factors of prognosis of cervical cancer patients.Results The serum circ-ATAD1 level in the study group was significantly higher than those in the control group and benign uterine lesion group(P<0.05),and miR-140-3p was significantly lower than those in the control group and benign uterine lesion group(P<0.05).The proportions of patients with low expression of miR-140-3p and high expression of circ-ATD1 in the cervical cancer patients with vaginal infiltration,lymph node metastasis,and FIGOstage Ⅲ-Ⅳ were higher than those in the cervical cancer patients with no vaginal infiltration,no lymph node metastasis,and FIGO stage Ⅰ-Ⅱ(P<0.05).The 3-year survival rate of cervical cancer patients with high circ-ATD1 expression was lower than that of patients with low circ-ATD1 expression(30.14%vs.64.38%,P<0.001).The 3-year survival rate of cervical cancer patients with high miR-140-3p expression was higher than that of patients with low miR-140-3p expression(61.64%vs.32.88%,P<0.001).FIGO stage,circ-ATAD1,lymph node metas-tasis and miR-140-3p were factors affecting the prognosis of cervical cancer patients(P<0.05).Conclusion The serum level of circ-ATAD1 in patients with cervical cancer is significantly increased and the level of miR-140-3p is significantly decreased,the two are closely related to lymph node metastasis and FIGO stage in patients with cervical cancer,and are influencing factors for the prognosis of cervical cancer patients.
2.Evidence-based guidelines for rehabilitation treatment after internal fixation of thoracolumbar spine fracture in adults (version 2025)
Zhengwei XU ; Liming CHENG ; Qixin CHEN ; Jian DONG ; Shunwu FAN ; Zhong FANG ; Shiqing FENG ; Haoyu FENG ; Haishan GUAN ; Weimin JIANG ; Dianming JIANG ; Yong HAI ; Lijun HE ; Yuan HE ; Bo LI ; Jianjun LI ; Feng LI ; Li LI ; Weishi LI ; Chunde LI ; Qi LIAO ; Baoge LIU ; Xiaoguang LIU ; Yong LIU ; Xuhua LU ; Shibao LU ; Bin LIN ; Wei MEI ; Chao MA ; Renfu QUAN ; Limin RONG ; Jiacan SU ; Honghui SUN ; Yuemin SONG ; Hongxun SANG ; Jun SHU ; Tiansheng SUN ; Jiwei TIAN ; Qiang WANG ; Xinwei WANG ; Zhe WANG ; Zheng WANG ; Liang YAN ; Guoyong YIN ; Jie ZHAO ; Yue ZHU ; Xiaobo ZHANG ; Xuesong ZHANG ; Zhongmin ZHANG ; Rongqiang ZHANG ; Dingjun HAO ; Yanzheng GAO ; Baorong HE
Chinese Journal of Trauma 2025;41(1):19-32
Thoracolumbar spine fracture often leads to severe pain, functional impairments, and neurological deficits, for which open reduction and internal fixation can effectively restore the spinal structural stability. Open decompression and reduction with internal fixation can help relieve spinal cord compression and improve spinal function in cases of concomitant cord injury. Although spinal stability can be restored through surgery, patients often face chronic pain and functional impairments postoperatively. A postoperative rehabilitation program is critical in optimizing therapeutic outcomes, reducing complications, and minimizing the risk of secondary injuries. However, current rehabilitation methods, such as physical therapy, functional training, and pain management, are confronted with problems in clinical practice, including significant variation in efficacy, poor patient adherence, and prolonged rehabilitation period. There is an urgent need for a unified rehabilitation strategy to address these problems. To this end, the Spinal Trauma Group of the Orthopedic Physicians Branch of the Chinese Medical Association and the Spine Health Professional Committee of the Chinese Human Health Technology Promotion Association organized experts from relevant fields to formulate Evidence-based guidelines for rehabilitation treatment after internal fixation of thoracolumbar spine fracture in adults ( version 2025) by integrating evidences from clinical researches and advanced rehabilitation concepts at home and abroad. A total number of 14 recommendations concerning the rehabilitation treatment with multimodal analgesia, psychological intervention, deep vein thrombosis prevention, core muscle and extremity exercise, appropriate use of braces, early weight-bearing, device-aided rehabilitation exercise, neuroregulatory therapy, rehabilitation team were put forward, aiming to standardize the post-operative rehabilitation process following internal fixation, promote the functional recovery, and enhance patients′ quality of life.
3.Clinical guideline for vertebral augmentation of acute symptomatic osteoporotic thoracolumbar compression fractures (version 2025)
Bolong ZHENG ; Wei MEI ; Yanzheng GAO ; Liming CHENG ; Jian CHEN ; Qixin CHEN ; Liang CHEN ; Xigao CHENG ; Jian DONG ; Jin FAN ; Shunwu FAN ; Xiangqian FANG ; Zhong FANG ; Shiqing FENG ; Haoyu FENG ; Haishan GUAN ; Yong HAI ; Baorong HE ; Lijun HE ; Yuan HE ; Hua HUI ; Weimin JIANG ; Junjie JIANG ; Dianming JIANG ; Xuewen KANG ; Hua GUO ; Jianjun LI ; Feng LI ; Li LI ; Weishi LI ; Chunde LI ; Qi LIAO ; Baoge LIU ; Xiaoguang LIU ; Xuhua LU ; Shibao LU ; Bin LIN ; Chao MA ; Xuexiao MA ; Renfu QUAN ; Limin RONG ; Honghui SUN ; Tiansheng SUN ; Yueming SONG ; Hongxun SANG ; Jun SHU ; Jiacan SU ; Jiwei TIAN ; Xinwei WANG ; Zhe WANG ; Zheng WANG ; Zhengwei XU ; Huilin YANG ; Jiancheng YANG ; Liang YAN ; Feng YAN ; Guoyong YIN ; Xuesong ZHANG ; Zhongmin ZHANG ; Jie ZHAO ; Yuhong ZENG ; Yue ZHU ; Rongqiang ZHANG
Chinese Journal of Trauma 2025;41(9):805-818
Acute symptomatic osteoporotic thoracolumbar compression fracture (ASOTLF) can lead to chronic low back pain, kyphosis deformity, pulmonary dysfunction, loss of mobility, and even life-threatening complications. Vertebral augmentation is currently the mainstream treatment method for this condition. In 2019, the Editorial Board of Chinese Journal of Trauma and the Spinal Trauma Group of Orthopedic Surgeons Branch of Chinese Medical Doctor Association collaboratively led the development of Clinical guideline for vertebral augmentation for acute symptomatic osteoporotic thoracolumbar compression fractures. Six years later, with advances in clinical diagnosis and treatment techniques as well as accumulating evidence in related fields, the 2019 guideline requires updating. To this end, the Spinal Trauma Group of Orthopedic Surgeons Branch of Chinese Medical Doctor Association, the Spinal Health Professional Committee of China Human Health Science and Technology Promotion Association, and the Minimally Invasive Orthopedics Professional Committee of Shaanxi Medical Doctor Association have organized experts in the field to develop the Clinical guideline for vertebral augmentation of acute symptomatic osteoporotic thoracolumbar compression fractures ( version 2025) , based on the latest evidence-based medical researches. This guideline incorporates 3 recommendations retained from the 2019 version with updated strength of evidence, along with 12 new recommendations. It provides recommendations from six aspects of diagnosis, pain management, treatment option selection, prevention of postoperative complications, anti-osteoporosis therapy, and postoperative rehabilitation, aiming to provide a reference for standard treatment of vertebral augmentation for ASOTLF in hospitals at all levels.
4.A retrospective study comparing tubular fusion channel and bladed retractor fusion channel in full-endoscopic lumbar interbody fusion
Yang YANG ; Zihao CHEN ; Zhongyu LIU ; Ruiqiang CHEN ; Jiakun QI ; Jianwen DONG ; Limin RONG
Chinese Journal of Orthopaedics 2025;45(1):10-18
Objective:To evaluate the feasibility, safety, and clinical outcomes of full-time full-endoscopic lumbar interbody fusion (FELIF) using a bladed retractor fusion channel (BRFC) system with reversed-mounting designed instruments compared to a tubular fusion channel (TFC).Methods:This retrospective study analyzed 101 cases of uniportal coaxial endoscopic lumbar interbody fusion performed between June 2018 and April 2023. Based on the type of fusion channel utilized, patients were divided into the TFC group (59 cases) and the BRFC group (42 cases). The BRFC technique involved neurological decompression, endplate preparation, and interbody fusion performed under full-time endoscopic monitoring with reversed-mounting designed instruments. Key parameters, including surgery duration, intraoperative estimated blood loss (IEBL), complication incidence, and interbody fusion rate (assessed by Bridwell criteria), were compared between the two groups. Clinical outcomes, including visual analog scale (VAS) scores for back and leg pain, Japanese Orthopaedic Association (JOA) scores, and Oswestry Disability Index (ODI), were recorded preoperatively, postoperatively, and at the final follow-up. Additionally, disc height at the fusion level was measured at one week postoperatively.Results:The mean follow-up duration was 42.9±12.1 months in the TFC group and 20.9±4.9 months in the BRFC group. No statistically significant differences were observed between the two groups in terms of surgery duration, IEBL, complication incidence, or interbody fusion rate (Grade 1 or 2 by Bridwell criteria) ( P>0.05). For single-level cases, the TFC group showed significantly better short-term clinical outcomes than the BRFC group at one week postoperatively, with JOA scores of 23(20, 25) versus 20(18, 23) ( Z=3.020, P=0.003) and ODI scores of 16%(11%, 21%) versus 28%(21%, 41%) ( Z=4.740, P<0.001). For double-level cases, the JOA score in the TFC group [23(20, 25)] was also significantly better than that in the BRFC group [20(18, 21)] ( Z=2.054, P=0.040) at one week postoperatively. However, at the final follow-up, all clinical indicators showed no significant differences between the two groups ( P>0.05). The disc height at the fusion level significantly increased at one week postoperatively compared to preoperative measurements in both groups ( P<0.05). However, the BRFC group demonstrated a significantly more recovery of disc height at one week postoperatively [(1.46±0.28) cm] compared to the TFC group [(1.17±0.20) cm] ( t=5.947, P<0.001). Conclusion:Full-time FELIF using the BRFC system and reversed-mounting designed instruments is a feasible, safe, and effective approach. However, its short-term clinical outcomes appear inferior to traditional FELIF using the TFC system.
5.A retrospective study comparing tubular fusion channel and bladed retractor fusion channel in full-endoscopic lumbar interbody fusion
Yang YANG ; Zihao CHEN ; Zhongyu LIU ; Ruiqiang CHEN ; Jiakun QI ; Jianwen DONG ; Limin RONG
Chinese Journal of Orthopaedics 2025;45(1):10-18
Objective:To evaluate the feasibility, safety, and clinical outcomes of full-time full-endoscopic lumbar interbody fusion (FELIF) using a bladed retractor fusion channel (BRFC) system with reversed-mounting designed instruments compared to a tubular fusion channel (TFC).Methods:This retrospective study analyzed 101 cases of uniportal coaxial endoscopic lumbar interbody fusion performed between June 2018 and April 2023. Based on the type of fusion channel utilized, patients were divided into the TFC group (59 cases) and the BRFC group (42 cases). The BRFC technique involved neurological decompression, endplate preparation, and interbody fusion performed under full-time endoscopic monitoring with reversed-mounting designed instruments. Key parameters, including surgery duration, intraoperative estimated blood loss (IEBL), complication incidence, and interbody fusion rate (assessed by Bridwell criteria), were compared between the two groups. Clinical outcomes, including visual analog scale (VAS) scores for back and leg pain, Japanese Orthopaedic Association (JOA) scores, and Oswestry Disability Index (ODI), were recorded preoperatively, postoperatively, and at the final follow-up. Additionally, disc height at the fusion level was measured at one week postoperatively.Results:The mean follow-up duration was 42.9±12.1 months in the TFC group and 20.9±4.9 months in the BRFC group. No statistically significant differences were observed between the two groups in terms of surgery duration, IEBL, complication incidence, or interbody fusion rate (Grade 1 or 2 by Bridwell criteria) ( P>0.05). For single-level cases, the TFC group showed significantly better short-term clinical outcomes than the BRFC group at one week postoperatively, with JOA scores of 23(20, 25) versus 20(18, 23) ( Z=3.020, P=0.003) and ODI scores of 16%(11%, 21%) versus 28%(21%, 41%) ( Z=4.740, P<0.001). For double-level cases, the JOA score in the TFC group [23(20, 25)] was also significantly better than that in the BRFC group [20(18, 21)] ( Z=2.054, P=0.040) at one week postoperatively. However, at the final follow-up, all clinical indicators showed no significant differences between the two groups ( P>0.05). The disc height at the fusion level significantly increased at one week postoperatively compared to preoperative measurements in both groups ( P<0.05). However, the BRFC group demonstrated a significantly more recovery of disc height at one week postoperatively [(1.46±0.28) cm] compared to the TFC group [(1.17±0.20) cm] ( t=5.947, P<0.001). Conclusion:Full-time FELIF using the BRFC system and reversed-mounting designed instruments is a feasible, safe, and effective approach. However, its short-term clinical outcomes appear inferior to traditional FELIF using the TFC system.
6.Evidence-based guidelines for rehabilitation treatment after internal fixation of thoracolumbar spine fracture in adults (version 2025)
Zhengwei XU ; Liming CHENG ; Qixin CHEN ; Jian DONG ; Shunwu FAN ; Zhong FANG ; Shiqing FENG ; Haoyu FENG ; Haishan GUAN ; Weimin JIANG ; Dianming JIANG ; Yong HAI ; Lijun HE ; Yuan HE ; Bo LI ; Jianjun LI ; Feng LI ; Li LI ; Weishi LI ; Chunde LI ; Qi LIAO ; Baoge LIU ; Xiaoguang LIU ; Yong LIU ; Xuhua LU ; Shibao LU ; Bin LIN ; Wei MEI ; Chao MA ; Renfu QUAN ; Limin RONG ; Jiacan SU ; Honghui SUN ; Yuemin SONG ; Hongxun SANG ; Jun SHU ; Tiansheng SUN ; Jiwei TIAN ; Qiang WANG ; Xinwei WANG ; Zhe WANG ; Zheng WANG ; Liang YAN ; Guoyong YIN ; Jie ZHAO ; Yue ZHU ; Xiaobo ZHANG ; Xuesong ZHANG ; Zhongmin ZHANG ; Rongqiang ZHANG ; Dingjun HAO ; Yanzheng GAO ; Baorong HE
Chinese Journal of Trauma 2025;41(1):19-32
Thoracolumbar spine fracture often leads to severe pain, functional impairments, and neurological deficits, for which open reduction and internal fixation can effectively restore the spinal structural stability. Open decompression and reduction with internal fixation can help relieve spinal cord compression and improve spinal function in cases of concomitant cord injury. Although spinal stability can be restored through surgery, patients often face chronic pain and functional impairments postoperatively. A postoperative rehabilitation program is critical in optimizing therapeutic outcomes, reducing complications, and minimizing the risk of secondary injuries. However, current rehabilitation methods, such as physical therapy, functional training, and pain management, are confronted with problems in clinical practice, including significant variation in efficacy, poor patient adherence, and prolonged rehabilitation period. There is an urgent need for a unified rehabilitation strategy to address these problems. To this end, the Spinal Trauma Group of the Orthopedic Physicians Branch of the Chinese Medical Association and the Spine Health Professional Committee of the Chinese Human Health Technology Promotion Association organized experts from relevant fields to formulate Evidence-based guidelines for rehabilitation treatment after internal fixation of thoracolumbar spine fracture in adults ( version 2025) by integrating evidences from clinical researches and advanced rehabilitation concepts at home and abroad. A total number of 14 recommendations concerning the rehabilitation treatment with multimodal analgesia, psychological intervention, deep vein thrombosis prevention, core muscle and extremity exercise, appropriate use of braces, early weight-bearing, device-aided rehabilitation exercise, neuroregulatory therapy, rehabilitation team were put forward, aiming to standardize the post-operative rehabilitation process following internal fixation, promote the functional recovery, and enhance patients′ quality of life.
7.Clinical guideline for vertebral augmentation of acute symptomatic osteoporotic thoracolumbar compression fractures (version 2025)
Bolong ZHENG ; Wei MEI ; Yanzheng GAO ; Liming CHENG ; Jian CHEN ; Qixin CHEN ; Liang CHEN ; Xigao CHENG ; Jian DONG ; Jin FAN ; Shunwu FAN ; Xiangqian FANG ; Zhong FANG ; Shiqing FENG ; Haoyu FENG ; Haishan GUAN ; Yong HAI ; Baorong HE ; Lijun HE ; Yuan HE ; Hua HUI ; Weimin JIANG ; Junjie JIANG ; Dianming JIANG ; Xuewen KANG ; Hua GUO ; Jianjun LI ; Feng LI ; Li LI ; Weishi LI ; Chunde LI ; Qi LIAO ; Baoge LIU ; Xiaoguang LIU ; Xuhua LU ; Shibao LU ; Bin LIN ; Chao MA ; Xuexiao MA ; Renfu QUAN ; Limin RONG ; Honghui SUN ; Tiansheng SUN ; Yueming SONG ; Hongxun SANG ; Jun SHU ; Jiacan SU ; Jiwei TIAN ; Xinwei WANG ; Zhe WANG ; Zheng WANG ; Zhengwei XU ; Huilin YANG ; Jiancheng YANG ; Liang YAN ; Feng YAN ; Guoyong YIN ; Xuesong ZHANG ; Zhongmin ZHANG ; Jie ZHAO ; Yuhong ZENG ; Yue ZHU ; Rongqiang ZHANG
Chinese Journal of Trauma 2025;41(9):805-818
Acute symptomatic osteoporotic thoracolumbar compression fracture (ASOTLF) can lead to chronic low back pain, kyphosis deformity, pulmonary dysfunction, loss of mobility, and even life-threatening complications. Vertebral augmentation is currently the mainstream treatment method for this condition. In 2019, the Editorial Board of Chinese Journal of Trauma and the Spinal Trauma Group of Orthopedic Surgeons Branch of Chinese Medical Doctor Association collaboratively led the development of Clinical guideline for vertebral augmentation for acute symptomatic osteoporotic thoracolumbar compression fractures. Six years later, with advances in clinical diagnosis and treatment techniques as well as accumulating evidence in related fields, the 2019 guideline requires updating. To this end, the Spinal Trauma Group of Orthopedic Surgeons Branch of Chinese Medical Doctor Association, the Spinal Health Professional Committee of China Human Health Science and Technology Promotion Association, and the Minimally Invasive Orthopedics Professional Committee of Shaanxi Medical Doctor Association have organized experts in the field to develop the Clinical guideline for vertebral augmentation of acute symptomatic osteoporotic thoracolumbar compression fractures ( version 2025) , based on the latest evidence-based medical researches. This guideline incorporates 3 recommendations retained from the 2019 version with updated strength of evidence, along with 12 new recommendations. It provides recommendations from six aspects of diagnosis, pain management, treatment option selection, prevention of postoperative complications, anti-osteoporosis therapy, and postoperative rehabilitation, aiming to provide a reference for standard treatment of vertebral augmentation for ASOTLF in hospitals at all levels.
8.Factors affecting psychological flexibility among cancer-related pain patients
JIA Limin ; WEI Qi ; LI Bing ; JIAO Fan ; YANG Shoufang ; WANG Liangjie
Journal of Preventive Medicine 2024;36(10):882-886
Objective:
To analyze the influencing factors of psychological flexibility for cancer-related pain patients, so as to provide insights for improving their psychological flexibility.
Methods:
Cancer-related pain patients hospitalized in the Oncology Department of Anhui Cancer Hospital were selected as the subjects of the survey. Demographic information and disease information were collected through questionnaires. Pain belief was assessed using the Pain Beliefs and Perceptions Inventory. Alexithymia was assessed using the Twenty-Item Toronto Alexithymia Scale-Ⅱ. Psychological flexibility was assessed using the Psychological Inflexibility in Pain Scale. The influencing factors of psychological flexibility among cancer-related pain patients was analyzed by using a multiple linear regression model.
Results:
A total of 202 cancer-related pain patients were surveyed, including 114 males (56.44%) and 88 females (43.56%). The mean age was (59.99±11.53) years. The primary tumor type was digestive system cancer, with 121 cases (59.90%). The average pain intensity in the past 24 hours was mainly mild, with 150 cases (74.26%). The median pain beliefs score was -0.19 (interquartile range, 0.39) points. The total score of alexithymia was (66.86±5.60) points. The total score of psychological flexibility in cancer-related pain patients was (66.35±7.23) points. Multiple linear regression analysis showed that pain belief (β'=0.321), alexithymia (β'=0.222), and average pain intensity in the past 24 hours (β'=-0.481) were influencing factors for psychological flexibility in cancer-related pain patients.
Conclusion
The psychological flexibility of cancer-related pain patients is related to pain beliefs, alexithymia and average pain intensity in the past 24 hours.
9.Clinical guidelines for the treatment of ankylosing spondylitis combined with lower cervical fracture in adults (version 2024)
Qingde WANG ; Yuan HE ; Bohua CHEN ; Tongwei CHU ; Jinpeng DU ; Jian DONG ; Haoyu FENG ; Shunwu FAN ; Shiqing FENG ; Yanzheng GAO ; Zhong GUAN ; Hua GUO ; Yong HAI ; Lijun HE ; Dianming JIANG ; Jianyuan JIANG ; Bin LIN ; Bin LIU ; Baoge LIU ; Chunde LI ; Fang LI ; Feng LI ; Guohua LYU ; Li LI ; Qi LIAO ; Weishi LI ; Xiaoguang LIU ; Hongjian LIU ; Yong LIU ; Zhongjun LIU ; Shibao LU ; Yong QIU ; Limin RONG ; Yong SHEN ; Huiyong SHEN ; Jun SHU ; Yueming SONG ; Tiansheng SUN ; Yan WANG ; Zhe WANG ; Zheng WANG ; Hong XIA ; Guoyong YIN ; Jinglong YAN ; Wen YUAN ; Zhaoming YE ; Jie ZHAO ; Jianguo ZHANG ; Yue ZHU ; Yingjie ZHOU ; Zhongmin ZHANG ; Wei MEI ; Dingjun HAO ; Baorong HE
Chinese Journal of Trauma 2024;40(2):97-106
Ankylosing spondylitis (AS) combined with lower cervical fracture is often categorized into unstable fracture, with a high incidence of neurological injury and a high rate of disability and morbidity. As factors such as shoulder occlusion may affect the accuracy of X-ray imaging diagnosis, it is often easily misdiagnosed at the primary diagnosis. Non-operative treatment has complications such as bone nonunion and the possibility of secondary neurological damage, while the timing, access and choice of surgical treatment are still controversial. Currently, there are no clinical practice guidelines for the treatment of AS combined with lower cervical fracture with or without dislocation. To this end, the Spinal Trauma Group of Orthopedics Branch of Chinese Medical Doctor Association organized experts to formulate Clinical guidelines for the treatment of ankylosing spondylitis combined with lower cervical fracture in adults ( version 2024) in accordance with the principles of evidence-based medicine, scientificity and practicality, in which 11 recommendations were put forward in terms of the diagnosis, imaging evaluation, typing and treatment, etc, to provide guidance for the diagnosis and treatment of AS combined with lower cervical fracture.
10.Polypyrrole-chitosan conductive composite hydrogel promotes recovery of cardiac function after ischemia-reperfusion injury
Xinzhu WANG ; Qi WANG ; Limin LANG ; Sheng HE
Chinese Journal of Tissue Engineering Research 2024;28(15):2315-2322
BACKGROUND:Conductive biomaterials are considered potential candidates for transmitting electrical signals for myocardial repair.Combining cell-based or cell-free strategies with conductive biomaterials to replenish cardiomyocytes and/or restore electrical signaling pathways is a promising approach for cardiac repair. OBJECTIVE:To evaluate the effect of polypyrrole-chitosan conductive composite hydrogel on cardiac function in rats with myocardial ischemia-reperfusion injury. METHODS:The polypyrrole-chitosan conductive composite hydrogel was prepared by chemical oxidative polymerization.The micromorphology,biocompatibility and conductivity of the hydrogels were characterized.Thirty adult SD rats were selected to establish a myocardial ischemia-reperfusion injury model by clamping the left anterior descending branch of the heart and then releasing it.After 21 days of modeling,the rats were divided into three groups by the random number table method:Normal saline was injected into the left ventricular infarction area and infarction margin area in the blank group.Chitosan hydrogel was injected into the left ventricular infarction area and infarction margin area in the ordinary hydrogel group.The polypyrrole-chitosan conductive composite hydrogel was injected into the left ventricular infarction area and infarction margin area,with 10 rats in each group.The corresponding time points after modeling were set,and cardiac mechanical function(echocardiogram,pressure-volume analysis),cardiac electrophysiology(electrocardiogram,programmed electrical stimulation,optical mapping technology,microelectrode array technology,eight-lead electrocardiogram,and electrical resistivity of the scar area)and cardiac histology were detected. RESULTS AND CONCLUSION:(1)There were a lot of pores on the surface of the conductive composite hydrogel,and the conductivity was(3.19±0.03)×10-3 mS/cm,which had good biocompatibility co-cultured with smooth muscle cells.(2)After 105 days of modeling,echocardiogram and pressure-volume analysis showed that compared with the blank group and the ordinary hydrogel group,the conductive composite hydrogel could significantly improve the contractile function of the heart of rats with myocardial ischemia-reperfusion injury.The results of electrocardiogram,programmed electrical stimulation,optical mapping technology,microelectrode array technology,eight-lead electrocardiogram,and electrical resistivity of the scar area examination at 105 days after modeling displayed that,compared with the blank group and the ordinary hydrogel group,the conductive composite hydrogel could significantly improve the electrical conduction function of the heart of rats with myocardial ischemia-reperfusion injury and reduce the occurrence of arrhythmia.Masson staining of heart tissue at 105 days after modeling exhibited that there were different degrees of fibrosis in the myocardial infarction area of the three groups.Compared with the normal saline group and the ordinary hydrogel group,the conductive hydrogel group had more normal myocardial tissue and less fibrosis in the myocardial infarction area.(3)The results verify that polypyrrole-chitosan conductive composite hydrogel may promote the repair of infarcted heart after ischemia-reperfusion injury by increasing the electrical conduction velocity of infarct scar area tissue,increasing scar thickness,enhancing synchronous cardiac contraction,and reducing damaged tissue.


Result Analysis
Print
Save
E-mail