1.Differences in deltamethrin resistance and kdr gene mutation in Culex tritaeniorhynchus population in and outside the Yellow Sea wetland
Xiao-er ZHANG ; Zhi-ming WU ; Ye TIAN ; Qian CUI ; Yu-qian JI ; Huan WANG ; Shu-juan YANG ; Yi-chao ZHAO ; Yu WANG ; Hua-yu YIN ; Yu DING ; Guo-jin YAN ; Min-sen ZHAO ; Shou-gang ZHANG ; Bing-dong SONG ; Hong-na CHEN ; Jian GAO ; Wei-fang YANG ; Yu-fu ZHANG ; Hui LIU ; Hong-liang CHU
Acta Parasitologica et Medica Entomologica Sinica 2026;33(2):101-107
Objective To gain insights into the biological characteristics of different populations of Culex tritaeniorhynchus within and around the Yellow Sea wetland from the perspective of the occurrence of resistance, we investigated the levels of resistance to deltamethrin and kdr gene mutation in the wetland and its peripheral areas. Methods Specimens were collected from Cx. tritaeniorhynchus populations at two monitoring sites in the Rare Bird National Nature Reserve and Tiaozi Ni Wetland Scenic Area, and also from two populations in Yancheng City and the Liuhe District of Nanjing, and the resistance of these mosquitoes to deltamethrin was determined using the CDC biotest bottle method. For each concentration of deltamethrin assessed, a random subset of exposed specimens was selected for amplification of the kdr gene fragment, followed by Sanger sequencing to identify and analyze resistance-associated mutations. Results The LC50 levels of deltamethrin among mosquitoes from the four populations in Luhe, Yancheng, the Rare Bird National Nature Reserve and the Tiaozi Ni Wetland Scenic Area were 2.048 5, 7.798 2, 3.473 3, and 17.695 5 mg/mL, respectively, with corresponding concentrations of deltamethrin ranging from 0.005 to 5.000,0.050 to 50.000,0.050 to 25.000 and 0.050 to 50.000 mg/mL, respectively. Furthermore, the ranges of the KT50 values were 11.76-107.43, 67.05-216.30,29.77-107.43 and 28.40-329.51 min; the 1-h knockdown rates were 34.58%-99.15%, 9.52%-43.80%, 55.09%-73.01%, and 10.09%-68.07%; and the 24-h mortality rates were 12.15%-67.52%,9.52%-79.56%,13.17%-82.21%, and 11.01%-78.99%, respectively. With respect to kdr gene mutation, we assayed a total of 63,70,59, and 57 mosquitoes for the four populations, for which we detected L1014F mutation frequencies of 14.29%, 35.00%, 20.34%, and 31.58%, respectively, with a majority of these mutations being heterozygous for resistance. In addition, five adult mosquitoes were identified has having synonymous mutations at site 1011[i. e. , AAT(asparagine)mutation to AAC(asparagine)]. Conclusions Our findings revealed the clear resistance of Cx. tritaeniorhynchus to deltamethrin in the Yancheng region of the Yellow Sea wetland, and the resistance phenotype and kdr frequency of Cx. tritaeniorhynchus in the wetland environment were comparable to those of Cx. tritaeniorhynchus in the wetland environment, thereby indicating that the resistance of different populations of Cx. tritaeniorhynchus was homogeneous under the pressure of different insecticide selection within and around the wetland. However, the underlying mechanisms need to be further studied.
2.Aerobic Exercise and MOTS-c Ameliorate Hepatic Oxidative Stress and Metabolic Disorder in Type 2 Diabetes via The NRF2/PPARγ Axis
Fei-Long CHEN ; Zhi-Yu LI ; Tu-Tu WANG ; Yu FU ; Lei LÜ ; Cheng-Yuan XING ; Shun-Chang LI
Progress in Biochemistry and Biophysics 2026;53(8):2071-2090
ObjectiveType 2 diabetes mellitus (T2DM) often causes severe hepatic metabolic complications, dominated by metabolic associated fatty liver disease (MAFLD). Persistent hepatic steatosis and oxidative stress further trigger steatohepatitis and progressive liver damage, increasing the mortality risk of diabetic patients. Aerobic exercise effectively improves hepatic lipid metabolism and antioxidant capacity, but poor patient adherence restricts its long-term clinical application. Mitochondrial-derived mitochondrial open reading frame of the 12S rRNA type-c (MOTS-c) is a key peptide regulating insulin sensitivity and hepatic redox homeostasis. This study aimed to explore the protective mechanism of MOTS-c against T2DM-related liver injury and its combined beneficial effect with aerobic exercise via the NRF2/PPARγ signaling axis. This study aimed to investigate whether MOTS-c cooperates with aerobic exercise to alleviate T2DM-associated hepatic oxidative stress and metabolic dysfunction by activating the NRF2/PPARγ axis, and to clarify the molecular and transcriptomic characteristics of their combined intervention. MethodsStable MOTS-c overexpression and knockdown HepG2 cell lines were constructed using lentiviral transfection. An oleic acid-induced cellular lipid accumulation model and NRF2-knockout cell model were applied to verify the NRF2-dependent mechanism ofMOTS-c. Intracellular lipid deposition, triglyceride levels, antioxidant enzyme activities, and the expression of NRF2/PPARγ pathway-related genes and proteins were detected. In vivo, a T2DM rat model with obvious hepatic steatosis was established via a high-fat and high-sucrose diet combined with streptozotocin injection. Model rats received aerobic exercise, MOTS-c intraperitoneal injection, or combined intervention. We detected systemic glycolipid metabolic indicators, hepatic histopathological changes, and the expression of core proteins in the hepatic NRF2/PPARγ axis. Hepatic transcriptomic sequencing was performed to screen differentially expressed genes (DEGs) and enrich key pathways co-regulated by MOTS-c and aerobic exercise. ResultsCellular results showed that MOTS-c overexpression significantly reduced oleic acid-induced lipid deposition, enhanced antioxidant enzyme activity, and upregulated NRF2 and PPARγ expression. Conversely, MOTS-c knockdown aggravated hepatic lipid accumulation and oxidative damage and inhibited NRF2/PPARγ pathway activation. NRF2 knockout completely eliminated the protective effects of MOTS-c on lipid metabolism and redox balance, confirming its NRF2-dependent regulatory mechanism. In T2DM rats, both MOTS-c supplementation and aerobic exercise effectively improved insulin resistance, corrected glycolipid metabolic disorders, and alleviated hepatic steatosis, while consistently activating the hepatic NRF2/PPARγ axis. Compared with single intervention, the combined treatment showed a better improvement trend in hepatic metabolic and oxidative injury, without definitive synergistic effects. Transcriptomic analysis revealed that the co-regulated DEGs of MOTS-c and aerobic exercise were primarily enriched in lipid metabolism and PPAR signaling pathways, with multiple antioxidant and lipid-regulating genes significantly modulated by combined intervention. ConclusionMOTS-c exhibits obvious exercise-mimetic hepatoprotective effects in T2DM. It activates the hepatic NRF2/PPARγ axis to strengthen antioxidant defense, stabilize lipid metabolism, and relieve T2DM-associated hepatic steatosis and oxidative damage. Furthermore, MOTS-c produces additive beneficial effects with aerobic exercise, showing a superior intervention trend on diabetic liver dysfunction. This study identifies the NRF2/PPARγ axis as the core mechanism of MOTS-c-regulated hepatic protection, elucidates the transcriptomic basis of combined intervention, and provides a reliable theoretical basis and potential therapeutic target for clinical intervention in T2DM-complicated MAFLD.
3.Advacnes in right ventricular function in pulmonary hypertension:focus on the 7th World Symposium on Pulmonary Hypertension
Shao-fei LIU ; Rui-qi WANG ; Zhi-fu GUO ; Ni ZHU
Chinese Journal of Interventional Cardiology 2025;33(10):574-580
Since 1973,the World Symposium on Pulmonary Hypertension(WSPH)has served as a pivotal platform for the advancing research in pulmonary hypertension(PH).At the 6th WSPH in 2018,the WSPH expert group refined the definitions related to cardiopulmonary physiology and right ventricular(RV)failure,thereby underscoring the critical role of RV dysfunction in the progression of PH.With ongoing advances in the field,RV failure associated with PH has received increasing attention and is now recognized as an important determinant of the prognosis of PH.The 7th WSPH,held in Barcelona,Spain,in 2024,presented the latest perspectives on the RV pathophysiology and its interaction with the pulmonary vasculature.The symposium emphasized new insights into the pathology of RV failure,RV phenotypes across different PH subgroups,and progress in therapeutic approaches targeting RV dysfunction.Additionally,the WSPH expert group delineated prospective research directions and identified unresolved issues.This article will review the RV function-related updates from the 7th WSPH and summarize recent findings,providing a systematic review of the evolution and breakthroughs in RV function research within the context of PH.
4.Expert Consensus on the Ethical Requirements for Generative AI-Assisted Academic Writing
You-Quan BU ; Yong-Fu CAO ; Zeng-Yi CHANG ; Hong-Yu CHEN ; Xiao-Wei CHEN ; Yuan-Yuan CHEN ; Zhu-Cheng CHEN ; Rui DENG ; Jie DING ; Zhong-Kai FAN ; Guo-Quan GAO ; Xu GAO ; Lan HU ; Xiao-Qing HU ; Hong-Ti JIA ; Ying KONG ; En-Min LI ; Ling LI ; Yu-Hua LI ; Jun-Rong LIU ; Zhi-Qiang LIU ; Ya-Ping LUO ; Xue-Mei LV ; Yan-Xi PEI ; Xiao-Zhong PENG ; Qi-Qun TANG ; You WAN ; Yong WANG ; Ming-Xu WANG ; Xian WANG ; Guang-Kuan XIE ; Jun XIE ; Xiao-Hua YAN ; Mei YIN ; Zhong-Shan YU ; Chun-Yan ZHOU ; Rui-Fang ZHU
Chinese Journal of Biochemistry and Molecular Biology 2025;41(6):826-832
With the rapid development of generative artificial intelligence(GAI)technologies,their widespread application in academic research and writing is continuously expanding the boundaries of sci-entific inquiry.However,this trend has also raised a series of ethical and regulatory challenges,inclu-ding issues related to authorship,content authenticity,citation accuracy,and accountability.In light of the growing involvement of AI in generating academic content,establishing an open,controllable,and trustworthy ethical governance framework has become a key task for safeguarding research integrity and maintaining trust within the academic community.This expert consensus outlines ethical requirements across key stages of AI-assisted academic writing-including topic selection,data management,citation practices,and authorship attribution.It aims to clarify the boundaries and ethical obligations surrounding AI use in academic writing,ensuring that technological tools enhance efficiency without compromising in-tegrity.The goal is to provide guidance and institutional support for building a responsible and sustainable research ecosystem.
5.Development and validation of a predictive model for postoperative blood pressure outcomes in primary aldosteronism based on CYP11B2 gene polymorphism
Qiangfeng FU ; Yongjia CHEN ; Shengtao ZENG ; Haoxiang XU ; Chenglin YANG ; Yue YANG ; Zhi CAO ; Wei WANG
Chinese Journal of Urology 2025;46(7):529-536
Objective:To construct and validate a clinical model combining CYP11B2 gene polymorphisms with clinical parameters to predict complete postoperative hypertension remission in primary aldosteronism patients.Methods:The clinical data of a total of 116 patients with primary aldosteronism who underwent unilateral adrenalectomy from April 2018 to August 2024 were retrospectively included. There were 63 males and 53 females,with a body mass index(BMI)of(25.50 ± 2.03)kg/m 2. Genomic DNA was extracted from venous blood leukocytes before surgery,and polymerase chain reaction-restriction fragment length polymorphisms(PCR-RFLP)were used to detect CYP11B2(rs1799998)promoter region 344(C > T)base substitution. The follow-up duration was more than 6 months,with the following parameters recorded at the last follow-up:plasma aldosterone,renin,serum potassium,and sodium levels. Blood pressure progression and antihypertensive medication usage were also assessed. The postoperative outcome was determined according to the Primary Aldosteronism Surgical Outcome score(PASO)for primary aldosteronism,and the specific criteria were as follows. ① Clinical complete remission:the patient's blood pressure returned to normal(< 140/90 mmHg,1 mmHg = 0.133 kPa)and all antihypertensive drugs were discontinued;②Partial clinical remission:blood pressure returns to normal,and the number or dose of antihypertensive drugs is reduced compared with before;③Clinical non-remission:blood pressure does not drop and antihypertensive drugs do not change or increase compared with before surgery. Patients were divided into complete and incomplete remission groups. The chi-square test was used for univariate analysis,followed by binary logistic forward conditional regression for multivariate analysis,and a variety of machine learning algorithms such as random forest,logistic regression,support vector machine and gradient lifter were integrated,and the results of multivariate analysis were included to construct a postoperative blood pressure outcome model,and the predictive performance of the model was evaluated by using receiver operating characteristic(ROC)curve,calibration curve and clinical decision curve. Results:The PCR-RFLP detection results of 116 cases showed the genotype distribution of CYP11B2(344C > T)(rs1799998)as follows:CC type in 50 cases(43.1%),CT type in 46 cases(39.7%),and TT type in 20 cases(17.3%). There were 74 cases in the complete remission group and 42 cases in the incomplete remission group,and the rate of complete remission with hypertension at the end of the operation was 63.8%. Univariate analysis showed that the the differences between complete remission group and incomplete remission group in body mass index[(24.27 ± 2.90)kg/m 2 vs.(26.98 ± 3.17)kg/m 2, P<0.001],preoperative hypertension grade(grade 1/2/3:29/29/16 cases vs. 9/13/20 cases, P = 0.012),preoperative antihypertensive drugs(0/1/≥ 2:25/32/17 cases vs. 7/15/20 cases, P = 0.016),and CYP11B2(344C > T)(CC/TT + CT:39/35 cases vs. 11/31 cases, P = 0.006)were statistically significant. Multivariate analysis showed that the type of preoperative antihypertensive drugs[≥ 2: OR = 5.26(95% CI 1.12?24.61, P = 0.016;1: OR = 4.55(95% CI 1.23?22.47), P = 0.025]was the strongest independent predictor,followed by CYP11B2(344C > T)[ OR = 4.02(95% CI 1.16?13.82), P = 0.028]and BMI[ OR = 3.96(95% CI 2.26?6.92), P < 0.001]. Comparing the receiver operating feature(ROC)curves of the four types of machine learning models,the best model was the support vector machine model with an area under the curve(AUC)of 0.88(95% CI 0.82?0.95),followed by the gradient elevator model of 0.83(95% CI 0.76?0.91),the logistic regression model of 0.78(95% CI 0.68?0.88),and the random forest model of 0.77(95% CI 0.68?0.86). The optimal threshold of the Yoden index of the support vector machine model was 0.588,with a sensitivity of 78.5% and a specificity of 86.5%. The clinical decision curve and calibration curve show that the support vector machine model has a higher net benefit and acceptable stability and reliability. Conclusions:The support vector machine model incorporating CYP11B2 gene polymorphisms,BMI,and types of preoperative antihypertensive medications could effectively predict postoperative hypertension remission in primary aldosteronism patients,providing new evidence for personalized treatment strategies
6.Development and validation of a predictive model for postoperative blood pressure outcomes in primary aldosteronism based on CYP11B2 gene polymorphism
Qiangfeng FU ; Yongjia CHEN ; Shengtao ZENG ; Haoxiang XU ; Chenglin YANG ; Yue YANG ; Zhi CAO ; Wei WANG
Chinese Journal of Urology 2025;46(7):529-536
Objective:To construct and validate a clinical model combining CYP11B2 gene polymorphisms with clinical parameters to predict complete postoperative hypertension remission in primary aldosteronism patients.Methods:The clinical data of a total of 116 patients with primary aldosteronism who underwent unilateral adrenalectomy from April 2018 to August 2024 were retrospectively included. There were 63 males and 53 females,with a body mass index(BMI)of(25.50 ± 2.03)kg/m 2. Genomic DNA was extracted from venous blood leukocytes before surgery,and polymerase chain reaction-restriction fragment length polymorphisms(PCR-RFLP)were used to detect CYP11B2(rs1799998)promoter region 344(C > T)base substitution. The follow-up duration was more than 6 months,with the following parameters recorded at the last follow-up:plasma aldosterone,renin,serum potassium,and sodium levels. Blood pressure progression and antihypertensive medication usage were also assessed. The postoperative outcome was determined according to the Primary Aldosteronism Surgical Outcome score(PASO)for primary aldosteronism,and the specific criteria were as follows. ① Clinical complete remission:the patient's blood pressure returned to normal(< 140/90 mmHg,1 mmHg = 0.133 kPa)and all antihypertensive drugs were discontinued;②Partial clinical remission:blood pressure returns to normal,and the number or dose of antihypertensive drugs is reduced compared with before;③Clinical non-remission:blood pressure does not drop and antihypertensive drugs do not change or increase compared with before surgery. Patients were divided into complete and incomplete remission groups. The chi-square test was used for univariate analysis,followed by binary logistic forward conditional regression for multivariate analysis,and a variety of machine learning algorithms such as random forest,logistic regression,support vector machine and gradient lifter were integrated,and the results of multivariate analysis were included to construct a postoperative blood pressure outcome model,and the predictive performance of the model was evaluated by using receiver operating characteristic(ROC)curve,calibration curve and clinical decision curve. Results:The PCR-RFLP detection results of 116 cases showed the genotype distribution of CYP11B2(344C > T)(rs1799998)as follows:CC type in 50 cases(43.1%),CT type in 46 cases(39.7%),and TT type in 20 cases(17.3%). There were 74 cases in the complete remission group and 42 cases in the incomplete remission group,and the rate of complete remission with hypertension at the end of the operation was 63.8%. Univariate analysis showed that the the differences between complete remission group and incomplete remission group in body mass index[(24.27 ± 2.90)kg/m 2 vs.(26.98 ± 3.17)kg/m 2, P<0.001],preoperative hypertension grade(grade 1/2/3:29/29/16 cases vs. 9/13/20 cases, P = 0.012),preoperative antihypertensive drugs(0/1/≥ 2:25/32/17 cases vs. 7/15/20 cases, P = 0.016),and CYP11B2(344C > T)(CC/TT + CT:39/35 cases vs. 11/31 cases, P = 0.006)were statistically significant. Multivariate analysis showed that the type of preoperative antihypertensive drugs[≥ 2: OR = 5.26(95% CI 1.12?24.61, P = 0.016;1: OR = 4.55(95% CI 1.23?22.47), P = 0.025]was the strongest independent predictor,followed by CYP11B2(344C > T)[ OR = 4.02(95% CI 1.16?13.82), P = 0.028]and BMI[ OR = 3.96(95% CI 2.26?6.92), P < 0.001]. Comparing the receiver operating feature(ROC)curves of the four types of machine learning models,the best model was the support vector machine model with an area under the curve(AUC)of 0.88(95% CI 0.82?0.95),followed by the gradient elevator model of 0.83(95% CI 0.76?0.91),the logistic regression model of 0.78(95% CI 0.68?0.88),and the random forest model of 0.77(95% CI 0.68?0.86). The optimal threshold of the Yoden index of the support vector machine model was 0.588,with a sensitivity of 78.5% and a specificity of 86.5%. The clinical decision curve and calibration curve show that the support vector machine model has a higher net benefit and acceptable stability and reliability. Conclusions:The support vector machine model incorporating CYP11B2 gene polymorphisms,BMI,and types of preoperative antihypertensive medications could effectively predict postoperative hypertension remission in primary aldosteronism patients,providing new evidence for personalized treatment strategies
7.Mechanism of cofilin in regulating prostate cancer progression and potential therapeutic strategies
Fang-zhi FU ; Li-tong WU ; En-min FENG ; Xiang ZHAO ; Neng WANG ; Biao WANG ; Qing ZHOU
Chinese Pharmacological Bulletin 2025;41(7):1206-1211
The molecular mechanisms underlying the develop-ment and metastasis of prostate cancer remain elusive.This comprehensive review delves into the intricate role of cofilin,an actin-binding protein,in the pathogenesis and progression of prostate cancer.Cofilin is a significant protein in cytoskeletal dynamics,and any dysregulation may result in the morphological changes in normal cells and the invasion and metastasis of tumor cells.Research has revealed that the activity of cofilin is regula-ted by various mechanisms,including phosphorylation/dephos-phorylation and interactions with other molecules.Moreover,this review discusses promising therapeutic interventions,such as co-filin inhibitors and gene therapy,which have demonstrated effica-cy in preclinical models.The challenge of clinically preventing the transition to castration-resistant prostate cancer and tumor metastasis is widely recognized,necessitating the development of precise drug treatments and biomarker identification.As a key regulatory protein,cofilin provides a more comprehensive refer-ence for the prevention and treatment of prostate diseases.
8.A multicenter clinical study on intramedullary vancomycin injection for preventing periprosthetic joint infection in total knee arthroplasty
Te LIU ; Jun FU ; Shiguang LAI ; Zhuo ZHANG ; Chi XU ; Lei GENG ; Yang LUO ; Peng REN ; Xin ZHI ; Quanbo JI ; Heng ZHANG ; Runkai ZHAO ; Haichao REN ; Ye TAO ; Qingyuan ZHENG ; Zeyu FENG ; Jianfeng YANG ; Yiming WANG ; Pengcheng LI ; Shuai LIU ; Wei CHAI ; Xiang LI ; Huiwu LI ; Xiaogang ZHANG ; Baochao JI ; Xianzhe LIU ; Xinzhan MAO ; Jianbing MA ; Xiangxiang SUN ; Jiying CHEN ; Yonggang ZHOU ; Jinliang WANG ; Weijun WANG ; Guoqiang ZHANG ; Ming NI
Chinese Journal of Orthopaedics 2025;45(12):803-811
Objective:To explore the safety and efficacy of intraosseous regional administration (IORA) of vancomycin for preventing infection in primary total knee arthroplasty (TKA).Methods:A total of 124 patients with knee osteoarthritis undergoing TKA between February 2024 and May 2024 at nine hospitals were enrolled. Preoperative infection prophylaxis involved either IORA (0.5 g vancomycin administered via intraosseous regional infusion before incision) or intravenous infusion (1 g vancomycin via peripheral vein). The IORA group included 15 males and 47 females with a median age of 66.5 years (range, 60.0-70.0 years), while the intravenous group included 14 males and 48 females with a median age of 66.0 years (range, 61.8-70.3 years) years. Intraoperative samples were collected including fat and synovium tissues after incision, before prosthesis placement, and after tourniquet release; distal femoral cancellous bone during femoral osteotomy; proximal tibial cancellous bone during tibial osteotomy; proximal intercondylar cancellous bone before prosthesis placement; and peripheral blood from non-infused arms at surgery initiation and after tourniquet release. Vancomycin concentrations were measured using liquid chromatography-tandem mass spectrometry. Vital sign changes were recorded from admission to 5~10 minutes post-IORA (IORA group) or post-incision (intravenous group). Follow-ups were conducted on postoperative day 1 and 3, and at 1 and 3 months, to document complications including IORA-related adverse events, periprosthetic joint infections, surgical site infections, red man syndrome, acute kidney injury, deep vein thrombosis and so on.Results:Vancomycin concentrations in bone, fat, and synovial tissue samples were significantly higher in the IORA group than in the intravenous group ( P<0.05), while vancomycin concentrations in blood samples were significantly lower in the IORA group than in the intravenous group ( P<0.05). Only 7.3%(41/558) of tissue samples in the IORA group had vancomycin concentrations below 2.0 μg/g (the minimum inhibitory concentration of vancomycin against coagulase-negative staphylococcus), compared to 59.3%(331/558) in the intravenous group (χ 2=11.285, P<0.001). In the intravenous group, 16.9%(21/124) of blood samples had vancomycin concentrations exceeding 15.0 mg/L (the threshold associated with a significantly increased risk of nephrotoxicity), while all concentrations in the IORA group were below this threshold, the difference was statistically significant (χ 2=22.943, P<0.001). There were no statistically significant difference ( P>0.05) in vital signs changes before and after vancomycin administration between the two groups. Two patients in the intravenous group experienced incision exudate, while no other related complications occurred in either group. Conclusions:Compared to the traditional intravenous infusion of 1 g vancomycin, intraosseous injection of a low dose (0.5 g) of vancomycin achieves higher local tissue concentrations in the knee joint with a lower incidence of adverse reactions and is safe for infection prophylaxis. Despite guidelines not recommending the routine use of vancomycin for preventing infection after primary TKA, intraosseous injection of 0.5 g vancomycin may be considered intraoperatively for primary TKA in the following scenarios: patients in medical institutions with a high prevalence of methicillin-resistant staphylococcus aureus (MRSA) infections, patients with potential preoperative MRSA colonization, or patients with cephalosporin allergy.
9.Research progress in biomechanical parameter of Tuina rolling manipulation
Fanyi LI ; Xiaoyu ZHI ; Yuetong LI ; Fengjiao REN ; Shifang FU ; Yanguo WANG
International Journal of Traditional Chinese Medicine 2025;47(1):132-136
Rolling manipulation is one of the swing techniques with strong operational skills in massage therapy. This article summarized the biomechanical parameters and mechanism of the massage operation from multiple perspectives, including three-dimensional motion, force trajectory, dynamic parameters, force effect relationship, and mechanism. It is found that the massage operation could exert force in the vertical and horizontal directions of the body surface, and the movement trajectories of the front and back were generally symmetrical. The anterior force was approximately three times the retraction force, and the brachioradialis, pectoralis major, triceps, and deltoids were the main muscles that could exert force during manual manipulation. The method can have effects on hemodynamics, cellular anti-inflammatory effects, and improve the physiological function of tissues and organs. However, there is currently a lack of objective and unified norms and standards for the specific strength, frequency, and specific parameter combinations of massage methods, so the further improvement is still needed.
10.A multicenter clinical study on intramedullary vancomycin injection for preventing periprosthetic joint infection in total knee arthroplasty
Te LIU ; Jun FU ; Shiguang LAI ; Zhuo ZHANG ; Chi XU ; Lei GENG ; Yang LUO ; Peng REN ; Xin ZHI ; Quanbo JI ; Heng ZHANG ; Runkai ZHAO ; Haichao REN ; Ye TAO ; Qingyuan ZHENG ; Zeyu FENG ; Jianfeng YANG ; Yiming WANG ; Pengcheng LI ; Shuai LIU ; Wei CHAI ; Xiang LI ; Huiwu LI ; Xiaogang ZHANG ; Baochao JI ; Xianzhe LIU ; Xinzhan MAO ; Jianbing MA ; Xiangxiang SUN ; Jiying CHEN ; Yonggang ZHOU ; Jinliang WANG ; Weijun WANG ; Guoqiang ZHANG ; Ming NI
Chinese Journal of Orthopaedics 2025;45(12):803-811
Objective:To explore the safety and efficacy of intraosseous regional administration (IORA) of vancomycin for preventing infection in primary total knee arthroplasty (TKA).Methods:A total of 124 patients with knee osteoarthritis undergoing TKA between February 2024 and May 2024 at nine hospitals were enrolled. Preoperative infection prophylaxis involved either IORA (0.5 g vancomycin administered via intraosseous regional infusion before incision) or intravenous infusion (1 g vancomycin via peripheral vein). The IORA group included 15 males and 47 females with a median age of 66.5 years (range, 60.0-70.0 years), while the intravenous group included 14 males and 48 females with a median age of 66.0 years (range, 61.8-70.3 years) years. Intraoperative samples were collected including fat and synovium tissues after incision, before prosthesis placement, and after tourniquet release; distal femoral cancellous bone during femoral osteotomy; proximal tibial cancellous bone during tibial osteotomy; proximal intercondylar cancellous bone before prosthesis placement; and peripheral blood from non-infused arms at surgery initiation and after tourniquet release. Vancomycin concentrations were measured using liquid chromatography-tandem mass spectrometry. Vital sign changes were recorded from admission to 5~10 minutes post-IORA (IORA group) or post-incision (intravenous group). Follow-ups were conducted on postoperative day 1 and 3, and at 1 and 3 months, to document complications including IORA-related adverse events, periprosthetic joint infections, surgical site infections, red man syndrome, acute kidney injury, deep vein thrombosis and so on.Results:Vancomycin concentrations in bone, fat, and synovial tissue samples were significantly higher in the IORA group than in the intravenous group ( P<0.05), while vancomycin concentrations in blood samples were significantly lower in the IORA group than in the intravenous group ( P<0.05). Only 7.3%(41/558) of tissue samples in the IORA group had vancomycin concentrations below 2.0 μg/g (the minimum inhibitory concentration of vancomycin against coagulase-negative staphylococcus), compared to 59.3%(331/558) in the intravenous group (χ 2=11.285, P<0.001). In the intravenous group, 16.9%(21/124) of blood samples had vancomycin concentrations exceeding 15.0 mg/L (the threshold associated with a significantly increased risk of nephrotoxicity), while all concentrations in the IORA group were below this threshold, the difference was statistically significant (χ 2=22.943, P<0.001). There were no statistically significant difference ( P>0.05) in vital signs changes before and after vancomycin administration between the two groups. Two patients in the intravenous group experienced incision exudate, while no other related complications occurred in either group. Conclusions:Compared to the traditional intravenous infusion of 1 g vancomycin, intraosseous injection of a low dose (0.5 g) of vancomycin achieves higher local tissue concentrations in the knee joint with a lower incidence of adverse reactions and is safe for infection prophylaxis. Despite guidelines not recommending the routine use of vancomycin for preventing infection after primary TKA, intraosseous injection of 0.5 g vancomycin may be considered intraoperatively for primary TKA in the following scenarios: patients in medical institutions with a high prevalence of methicillin-resistant staphylococcus aureus (MRSA) infections, patients with potential preoperative MRSA colonization, or patients with cephalosporin allergy.


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