1.Mitogen-activated protein kinase signaling pathway regulates the development of osteoarthritis:guiding targeted therapy with traditional Chinese medicine
Hao LI ; Hongcheng TAO ; Ping ZENG ; Jinfu LIU ; Qiang DING ; Chicheng NIU ; Kai HUANG ; Hongyu KANG
Chinese Journal of Tissue Engineering Research 2026;30(6):1476-1485
BACKGROUND:Osteoarthritis is pathologically characterized by progressive degeneration of the articular cartilage and abnormal deformation of the subchondral bone.In recent years,with the deepening of medical research,it has been found that the mitogen-activated protein kinases(MAPK)signaling pathway has a regulatory role in inflammatory cell infiltration,inflammatory factor release,and chondrocyte proliferation,which is particularly important for the treatment of osteoarthritis.OBJECTIVE:To briefly review the main research progress in the mechanism of MAPK signaling pathway regulating osteoarthritis in recent years,aiming to provide new ideas for the treatment of osteoarthritis.METHODS:CNKI,WanFang and PubMed databases were searched for relevant literature using the search terms of"mitogen-activated protein kinases,osteoarthritis,extracellular signal-regulated MAP kinases,p38 mitogen-activated protein kinases,JNK mitogen-activated protein kinase"in Chinese and English.Relevant literature published from January 2019 to November 2024 was searched,and 108 articles were finally included for summary analysis.RESULTS AND CONCLUSION:(1)Various stimuli inside and outside the cells activate the MAPK signaling pathway,regulate gene transcription and protein synthesis,and promote the release of inflammatory factors,such as tumor necrosis factor-α,interleukin-1β,and interleukin-6.The release of these inflammatory factors aggravates the progression of osteoarthritis.(2)The active ingredients of traditional Chinese medicine,mainly saponins and flavonoids,as well as Chinese herbal formulas and preparations with the main effects of activating blood circulation and removing blood stasis,tonifying the liver and kidney,can play a therapeutic role in osteoarthritis by inhibiting the MAPK signaling pathway,regulating the release of matrix metalloproteinases,balancing the homeostatic state of osteogenesis and osteoblastogenesis,attenuating the synovial inflammation,decreasing the release of inflammatory factors and inflammatory vesicles,decreasing cellular pyroptosis,promoting autophagy,and ameliorating oxidative stress.(3)Although traditional Chinese medicine has become popular in the treatment of osteoarthritis by virtue of its own advantages of multi-components,multi-targets,multi-pathways,and low side effects,the use of MAPK signaling pathway to guide the treatment of individual osteoarthritis is the difficulty of the technology,which needs to be continuously researched and explored.(4)Therefore,further development of relevant herbal inhibitors that can modulate the MAPK signaling pathway may be a potential drug strategy for the treatment of osteoarthritis in the future.
2.Mitogen-activated protein kinase signaling pathway regulates the development of osteoarthritis:guiding targeted therapy with traditional Chinese medicine
Hao LI ; Hongcheng TAO ; Ping ZENG ; Jinfu LIU ; Qiang DING ; Chicheng NIU ; Kai HUANG ; Hongyu KANG
Chinese Journal of Tissue Engineering Research 2026;30(6):1476-1485
BACKGROUND:Osteoarthritis is pathologically characterized by progressive degeneration of the articular cartilage and abnormal deformation of the subchondral bone.In recent years,with the deepening of medical research,it has been found that the mitogen-activated protein kinases(MAPK)signaling pathway has a regulatory role in inflammatory cell infiltration,inflammatory factor release,and chondrocyte proliferation,which is particularly important for the treatment of osteoarthritis.OBJECTIVE:To briefly review the main research progress in the mechanism of MAPK signaling pathway regulating osteoarthritis in recent years,aiming to provide new ideas for the treatment of osteoarthritis.METHODS:CNKI,WanFang and PubMed databases were searched for relevant literature using the search terms of"mitogen-activated protein kinases,osteoarthritis,extracellular signal-regulated MAP kinases,p38 mitogen-activated protein kinases,JNK mitogen-activated protein kinase"in Chinese and English.Relevant literature published from January 2019 to November 2024 was searched,and 108 articles were finally included for summary analysis.RESULTS AND CONCLUSION:(1)Various stimuli inside and outside the cells activate the MAPK signaling pathway,regulate gene transcription and protein synthesis,and promote the release of inflammatory factors,such as tumor necrosis factor-α,interleukin-1β,and interleukin-6.The release of these inflammatory factors aggravates the progression of osteoarthritis.(2)The active ingredients of traditional Chinese medicine,mainly saponins and flavonoids,as well as Chinese herbal formulas and preparations with the main effects of activating blood circulation and removing blood stasis,tonifying the liver and kidney,can play a therapeutic role in osteoarthritis by inhibiting the MAPK signaling pathway,regulating the release of matrix metalloproteinases,balancing the homeostatic state of osteogenesis and osteoblastogenesis,attenuating the synovial inflammation,decreasing the release of inflammatory factors and inflammatory vesicles,decreasing cellular pyroptosis,promoting autophagy,and ameliorating oxidative stress.(3)Although traditional Chinese medicine has become popular in the treatment of osteoarthritis by virtue of its own advantages of multi-components,multi-targets,multi-pathways,and low side effects,the use of MAPK signaling pathway to guide the treatment of individual osteoarthritis is the difficulty of the technology,which needs to be continuously researched and explored.(4)Therefore,further development of relevant herbal inhibitors that can modulate the MAPK signaling pathway may be a potential drug strategy for the treatment of osteoarthritis in the future.
3.Zanthoxylum Bungeanum Seed Oil Inhibits PI3K/AKT/mTOR Pathway to Induce Autophagy and Apoptosis of Human Laryngeal Cancer Cells in Vitro
Lin LI ; Wenhong WANG ; Kai HOU ; Zhaofang LIU ; Qiang SUN
Journal of Modern Laboratory Medicine 2025;40(4):91-96
Objective To investigate the effect and mechanism of zanthoxylum bungeanum seed oil on autophagy and apoptosis of laryngeal cancer cells.Methods Human bronchial epithelial cells BEAS-2B and human laryngeal cancer cells Hep-2 were treated with different volume fractions(v/v)of Zanthoxylum bungeanum seed oil(0,0.02%,0.04%,0.06%,0.08%,0.10%),respectively,cell viability was detected by cell counting kit-8 method(CCK-8).Hep-2 cells in logarithmic growth phase were randomly divided into control group,Zanthoxylum bungeanum seed oil low,medium and high dose groups and Zanthoxylum bungeanum seed oil high dose+insulin-like growth factor 1(IGF-1)(PI3K agonist)group,cell apoptosis and cell cycle progression were detected by flow cytometry(FCM)assay,the formation of autophagic vesicles was detected by monodansyl cadaverine(MDC)staining,the expression of apoptosis,autophagy and phosphatidylinositide 3-kinases(PI3K)/protein kinase B(AKT)/mechanistic target of rapamycin(mTOR)pathway-related proteins were detected by Western blotting(WB).Results Compared with the control group Hep-2(99.03%±0.82%),treatment with zanthoxylum bungeanum seed oil(0.02%,0.04%,0.06%,0.08%,0.10%)(v/v)could reduce cell survival rate(84.63%±0.73%,57.34%±0.84%,19.76%±0.62%,17.22%±0.72%,12.19%±0.81%),and the differences were statistically significant(t=22.718~133.559,all P<0.001),while it has no inhibitory effect on BEAS-2B activity(t=0.283~1.980,all P>0.05).Compared with the control group,the Hep-2 apoptosis rate,G1/G0 phase cell proportion,autophagic vesicle integrated optical density(IOD)value,Cleaved-caspase-3,Bcl-2 associated X protein(Bax),microtubule-associated protein 1A/1B 1ight chain 3I/Ⅱ(LC 3I/Ⅱ)and Beclin-1 expression were all increased in the low,medium,and high-close groups of zantheoxylum bungeanum seed oil(t=4.270~58.425);the proportion of G2/M phase cells,ubiquitin-binding protein P62,Bcl-2 expression and p-PI3K/PI3K,p-AKT/AKT and p-mTOR/mTOR expression were all decreased(t=3.041~58.765),and the differences were statistically significant(all P<0.05).Compared with the high-dose zanthoxylum bungeanum seed oil group,the apoptosis rate of Hep-2,the proportion of G1/G0 phase cells,the expression of Cleaved-caspase-3,Bax,LC3Ⅱ/I and Beclin-1,the IOD value of autophagic vesicles(t=4.931~39.507),the expression of Bcl-2 and ubiquitin-binding protein P62,the proportion of G2/M phase cells,the ratio of p-PI3K/PI3K,p-AKT/AKT and p-mTOR/mTOR in the high-dose zanthoxylum bungeanum seed oil+IGF-1 group were decreased(t=3.402~14.207),and the differences were statistically significant(all P<0.05).Conclusion Zanthoxylum bungeanum seed oil can promote autophagy and apoptosis of Hep-2 cells,and its mechanism may be related to the inhibition of PI3K/AKT/mTOR pathway activation.
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.Trends of Esophageal Cancer Epidemiologic Characteris-tics and Life Years Lost in Linzhou City of Henan Province from 2010 to 2019
Qiang WANG ; Fuqiang QIN ; Xiaohong WANG ; Zhicai LIU ; Kai HOU ; Xiaodong YU ; Li WANG ; Chang LIU ; Ziru HAO ; Shuzheng LIU ; Qiong CHEN ; Yin LIU
China Cancer 2025;34(5):341-347
[Purpose]To analyze the trends in incidence,mortality and potential life loss of esophageal cancer in Linzhou City of Henan Province from 2010 to 2019.[Methods]The data of esophageal cancer incidence and mortality from 2010 to 2019 were collected from Linzhou cancer registries.The crude incidence and mortality rates,age-standardized rates(ASR)by sex and age group,the potential years of life lost(PYLL),average potential years of life lost(APYLL),and potential years of life lost rate(PYLLR)were calculated.The average annual percentage change(AAPC)from 2010 to 2019 were analyzed with Joinpoint software.[Results]From 2010 to 2019,there were a total of 8 447 newly diagnosed cases and 6 475 deaths of esophageal cancer in Linzhou.The ASR incidence and ASR mortality of esophageal cancer in the total population,males,females all showed significant downward trends,with AAPCs of-3.97%,-4.35%,-3.29%and-3.78%,-2.68%,-4.95%,respectively(all P<0.05).The crude incidence and mortality rates in all age groups also showed significant downward trends.The AAPCs of incidence rate for the age groups of 0~49,50~59,60~69,and ≥70 years old were-9.92%,-8.27%,-1.41%,and-3.86%,respectively(all P<0.05),and the AAPCs of mortality rate were-950%,-12.36%,-2.61%,and-2.98%,respectively(all P<0.05).From 2010 to 2019,the total PYLL caused by esophageal cancer was 60 880 person years,APYLL was 13.73 person years,and PYLLR was 5.77‰.The PYLL,APYLL,and the PYLLR of the total population and those stratified by sex all showed a decreasing trend(all P<0.05).[Con-clusion]From 2010 to 2019,the incidence,mortality and potential life loss of esophageal cancer in Linzhou City all decreased,and the long-term effect and screening programs is significant.How-ever,the risk of esophageal cancer among men and the elderly is still relatively high,indicating that more targeted prevention and control strategies should be developed.
6.Trends of Incidence and Mortality of Malignant Tumors in Linzhou City of Henan Province from 2010 to 2019
Junwu JING ; Fuqiang QIN ; Qiang WANG ; Xiaohong WANG ; Zhicai LIU ; Kai HOU ; Xiaodong YU ; Li WANG ; Chang LIU ; Ziru HAO ; Shuzheng LIU ; Qiong CHEN ; Yin LIU
China Cancer 2025;34(5):348-354
[Purpose]To analyze the trends of incidence and mortality of malignant tumors in Linzhou City of Henan Province from 2010 to 2019.[Methods]The incidence and mortality data of malignant tumors of Linzhou cancer registration areas from 2010 to 2019 were collected and evaluated for data quality.The crude incidence/mortality rates and age-standardized incidence/mortality rates by Chinese standard population(ASIRC/ASMRC)were calculated by sex,age and can-cer type.Joinpoint software was used to calculate the average annual percentage change(AAPC)to analyze the trends from 2010 to 2019.[Results]From 2010 to 2019,the crude incidence of malig-nant tumors in Linzhou City showed an upward trend,with an AAPC of 2.09%(95%CI:0.58%~3.63%),while the ASIRC tended to be stable.The incidence of malignant tumors showed a signifi-cant upward trend in the 15~29 and 60~69 age groups,and a significant downward trend in the 70~79 age group.From 2010 to 2019,the ASIRC of esophageal cancer and stomach cancer in both men and women showed a significant downward trend,while that of lung cancer and prostate cancer increased in men,and the incidences of thyroid cancer,uterus cancer,cervical cancer,lung cancer and breast cancer increased significantly in women.From 2010 to 2019,the crude mortality of malignant tumors in Linzhou showed a significant upward trend,with an AAPC of 1.18%(95%CI:0.88%~1.48%),while ASMRC showed a significant downward trend,with an AAPC of-1.63%(95%CI:-1.86%~-1.40%).The mortality increased in the group aged 80 and above,while the other age groups remained in a downward or stable state.From 2010 to 2019,the ASMRC of stomach cancer and esophageal cancer in both men and women showed a down-ward trend,while those of prostate cancer,and malignant tumors of the lip,oral cavity and pha-ryngeal in men increased,and that of ovarian cancer in women increased significantly.[Conclu-sion]The disease burden of malignant tumors in Linzhou City is still heavy.The incidence of common cancer types such as thyroid cancer,prostate cancer and lung cancer shows a significant-ly increasing trends from 2010 to 2019.
7.Clinical effect of free perforator flap of superficial peroneal artery treatment of degloving injury of thumb and finger: a report of 14 cases
Heyun CHENG ; Kai WANG ; Jihui JU ; Qiang ZHAO ; You LI ; Shuang LIU ; Benyuan WANG ; Quanwei GUO ; Wei ZHOU
Chinese Journal of Microsurgery 2025;48(4):399-404
Objective:To investigate the clinical effect of reconstruction of the degloving injury of thumb and finger with free perforator flap of superficial peroneal artery.Methods:This is a retrospective study. From June 2020 to June 2023, 18 superficial peroneal artery perforator flaps from 14 calves were used to treat 15 degloved digital wounds of 14 patients in the Department of Hand Surgery, Suzhou Ruihua Orthopaedic Hospital. There were 13 single digital degloving wounds and 1 two-digital degloving wounds. Of which, 3 digits were reconstructed with 2 free perforator flaps of ipsilateral superficial peroneal artery and 12 with a single free perforator flap of superficial peroneal artery. The size of wounds was 4.0 cm×2.0 cm-10.0 cm×4.0 cm, and the flaps were 5.0 cm×3.0 cm-12.0 cm×4.0 cm in size. The donor sites in calves were sutured layer by layer with absorptive sutures. Postoperative follow-ups were conducted through regular outpatient visits, phone calls or WeChat. Survival of flaps, postoperative complications, therapeutic effect of the flaps and patient satisfaction were observed.Results:There was no vascular compromise or wound infection of the flaps. All patients were included in the 4 to 36 months of postoperative follow-up, with an average of 9.86 months. All flaps had good appearance, without obvious swelling. Colour and texture of the flaps was close to the surrounding skin. The flaps had no obvious pigmentation or ulcer and scar hyperplasia at recipient site. Sensation of the flaps recovered to S 2 to S 3. There was no obvious scar hyperplasia, pain or dysfunction at donor sites. According to the comprehensive evaluation scale of flap, the scores were found at 81 to 91, with an average score of 85 in the 14 patients, and of whom 2 were excellent and 12 were good. Patient satisfaction was evaluated according to the Michigan Hand Outcomes Questionnaire (MHQ) and 10 patients were very satisfied and 4 were satisfied. Conclusion:Free perforator flap of superficial peroneal artery is one of the ideal flaps in reconstruction of degloving injury of thumb and fingers. It features constant and multiple perforators, reliable blood supply, high survival rate, flexible in design, thin and a small damage to the donor site.
8.Clinical efficacy of microscopic varicocelectomy versus laparoscopic varicocelectomy in the treatment of varicocele with male infertility
Yu PAN ; Ling FU ; Xiao-jing GUO ; Wen-xin LI ; Lin QIAN ; Lei YU ; Hong-qiang WANG ; Kai-shu ZHANG ; Shen-qian LI ; Qiang LI ; Pei-tao WANG ; Han-shu WANG ; Tao JING
National Journal of Andrology 2025;31(4):333-337
Objective:To compare the clinical efficacy between microscopic varicocelectomy and laparoscopic varicocelectomy in the treatment of varicocele(VC)with male infertility.Methods:A total of 307 patients who were diagnosed with VC complicated with male infertility and admitted to the Affiliated Hospital of Qingdao University from October 2018 to October 2022 were recruited for retrospective analysis.The patients were divided into the microscopic group(180 cases)and laparoscopic group(127 cases)according to the surgery method.The pre-and postoperative clinical data of these two groups were analyzed,including the degree of dilatation and reflux time of internal spermatic vein,hemodynamic parameters of testicular capsular artery,proportion of progressive motility spermato-zoa(PR),concentration of spermatozoa,proportion of normal morphology sperm,the pregnancy outcome of spouses and the incidence of complications related with surgery within 2 years postoperatively.Results:All the surgeries for the 307 patients in this study were successful.There was no significant difference in operation time,hospitalization time and management expenses between the microscop-ic group and the laparoscopic group(P>0.05).Compared to the patients in laparoscopic group,the patients in the microscopic group received a better improvement in venous diameter,reflux time of spermatic veins and hemodynamic parameters of testicular capsular ar-tery(P<0.05).Moreover,the semen analysis showed that the PR,spermatozoa concentration and proportion of normal morphology sperm in the microscopic group were also obviously increased than those in the laparoscopic group(P<0.05).During the 2-year fol-low-up period,the conception rate of spouses in the microscopic group was 67.2%,while only 47.2%in the laparoscopic group,in which the difference was statistically significant(P<0.05).Besides,the time-to-pregnancy(TTP)within 2 years postoperatively in the microscopic group was significantly shorter than that in the laparoscopic group(P<0.05).Meanwhile,the incidence of adverse pregnancy outcomes in the microscopic group was also significantly lower than that in the laparoscopic group(P<0.05).It is worth mentioned that the spontaneous conception rate of spouses with successful pregnancy in the microscopic group was also significantly higher than that in the laparoscopic group(P<0.05).Severe complication such as testicular atrophy,bleeding and infection did not appear in both of two groups.However,the incidences of testicular hydrocele and recurrence of VC postoperatively in the laparoscopic group were significantly higher than those in the microscopic group(P<0.05).Conclusion:Both microscopic varicocelectomy and laparoscopic varicocelectomy can be applied to the management of VC combined with male infertility.But microscopic varicocelectomy showed better clinical efficacy in improving the testicular hemodynamic parameters,semen quality,pregnancy outcome and postopera-tive complications,which is worthy of further clinical applications.
9.Safety and efficacy of robotic-assisted vs.laparoscopic hepatectomy for the treatment of hepatic hemangiomas
Gaiming JIANG ; Kai ZHENG ; Yukai LI ; Jing LI ; Qiang KANG ; Yang KE ; Yuehua LI
Chinese Journal of General Surgery 2025;34(1):70-78
Background and Aims:Hepatectomy is an important treatment option for hepatic hemangioma,and the approach has gradually shifted from traditional open surgery to laparoscopic and robotic-assisted surgery.However,there is still no consensus on whether robotic assistance provides better treatment outcomes than laparoscopic surgery for hepatic hemangioma.Therefore,this study was performed to evaluate and compare the clinical efficacy and safety of robotic-assisted and laparoscopic hepatectomy for the treatment of hepatic hemangioma.Methods:The clinical data of 184 patients who underwent minimally invasive hepatectomy for hepatic hemangioma in the Department of Hepatobiliary and Pancreatic Surgery,Second Affiliated Hospital of Kunming Medical University,between February 2021 and July 2024 were retrospectively collected.Among them,30 cases were in the robotic group,and 154 cases were in the laparoscopic group.Propensity score matching(PSM)was performed based on baseline data such as patient demographics,tumor characteristics,and surgical resection range,with a 1∶2 matching ratio.Intraoperative and postoperative outcomes were compared between the two groups after matching.Results:After 1∶2 PSM,24 patients were in the robotic group and 48 in the laparoscopic group.Preoperative variables were well balanced between the groups(area under the ROC curve was 0.588).The robotic group had significantly shorter operative time(138 min vs.168 min,P=0.024)and hepatic hilum blocking time(25 min vs.45 min,P<0.001)compared to the laparoscopic group.Postoperative albumin levels on day 1 and day 3 were higher in the robotic group,while transaminase levels on postoperative day 1 and day 3 were lower(all P<0.05).However,the hospitalization cost was higher in the robotic group than that in the laparoscopic group(74 746 yuan vs.49 644 yuan,P<0.001).No significant differences were found between the groups in terms of intraoperative blood loss,intraoperative transfusion rate,open conversion rate,postoperative length of stay,and postoperative complication rates as well as complication severity(all P>0.05).Conclusion:For suitable cases of hepatic hemangioma,robotic-assisted laparoscopic hepatectomy is a safe and feasible treatment option.Compared to traditional laparoscopic surgery,it reduces operative time and hepatic hilum blocking time,and minimizes the impact on postoperative liver function.However,the treatment cost is higher,and selection should be based on the patient's individual needs.
10.Predictive effects of different motor evoked potential warning thresholds on motor function recovery fol-lowing decompression for cervical and thoracic ossification of the posterior longitudinal ligament
Li LI ; Huan LI ; Kai CHEN ; Jia LIU ; Wenwen SHEN ; Yuqing WANG ; Xiufang WU ; Yushu BAI ; Qiang LI ; Jian-min LIU
The Journal of Practical Medicine 2025;41(18):2898-2905
Objective To explore the optimal warning threshold of motor evoked potentials(MEP)in decompression surgery for ossification of the posterior longitudinal ligament(OPLL)at cervical and thoracic segments,and the predictive role of different MEP parameters on postoperative lower extremity motor function.Methods A retrospective analysis was conducted on the clinical data of 227 patients diagnosed with cervical or thoracic OPLL and underwent decompression surgery from January 2022 to January 2024 in the hospital.There were 131 males and 96 females,with an average age of(60±10)years.All patients underwent continuous neuro-physiological monitoring during the operation,and the minimum ratio of MEP amplitude change to the baseline at the beginning of the operation(Dmax)and the ratio of MEP terminal amplitude change to the baseline at the end of the operation(Dend)were recorded.The correlations between these two ratios and the lower extremity motor func-tion immediately after the operation and at 1 year were compared.According to the Medical Research Council muscle strength score(MRC)standard,a postoperative score increase of≥1 point compared to preoperative was defined as postoperative motor dysfunction.Pearson correlation coefficients were used to evaluate the correlations between Dmax and Dend and the lower extremity motor function immediately after the operation and at 1 year.Receiver operating characteristic(ROC)curves were drawn to predict postoperative lower extremity motor dysfunc-tion using Dmax and Dend.Results Among the 227 patients,186 had cervical OPLL and 41 had thoracic OPLL.The incidence of lower extremity motor dysfunction immediately after the operation and at 1 year was 7 cases(3.76%)and 2 cases(1.08%)in the cervical group,and 9 cases(21.95%)and 3 cases(7.32%)in the thoracic group,respectively.The incidence of lower extremity motor dysfunction in the thoracic group was higher than that in the cervical group(P<0.001).The baseline induction rate of bilateral lower extremity MEPs was 98.92%(368/372)in the cervical group and 96.34%(79/82)in the thoracic group.The Pearson correlation coefficients of Dend with the bilateral lower extremity motor function immediately after the operation in the cervical and thoracic groups were both greater than those of Dmax,and the differences were statistically significant(cervical group:r=0.669,0.517,P=0.001 2;thoracic group:r=0.882,0.727,P=0.003 6),while the differences in the Pearson corre-lation coefficients of Dend and Dmax with the bilateral lower extremity motor function at 1 year were not statistically significant(cervical group:r=0.457,0.352,P=0.088;thoracic group:r=0.760,0.625,P=0.098).The cut-off values of Dend for the cervical group were 0.853 immediately after the operation and at 1 year,and the cut-off values of Dmax were 0.881 and 0.978,respectively.For the thoracic group,the cut-off values of Dend were 0.532 immediately after the operation and 0.639 at 1 year,and the cut-off values of Dmax were 0.532 and 0.640,respec-tively.Conclusions In OPLL surgery,the MEP monitoring strategy should be adjusted according to the surgical segment.For the cervical segment,Dmax should be emphasized to balance high sensitivity and specificity,while for the thoracic segment,Dmax or Dend can be flexibly selected.Higher MEP warning thresholds are required for cervical OPLL surgery(Dmax:0.881 immediately after the operation and 0.978 at 1 year;Dend:0.853),while significantly lower thresholds are needed for thoracic OPLL(Dmax/Dend:0.532 immediately after the operation and 0.640 at 1 year).

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