1.Clinical characteristics analysis of interstitial lung disease undergoing second lung transplantation
Mengyang LIU ; Yanran ZHOU ; Guilin PENG ; Chao YANG ; Hanyu YANG ; Hui LIU ; Xin XU
Organ Transplantation 2025;16(6):890-897
Objective To analyze the clinical characteristics of recipients with interstitial lung disease (ILD) who underwent second lung transplantation and summarize the diagnostic and therapeutic experience. Methods A retrospective analysis was conducted on the clinical data of 14 patients who underwent first and second lung transplants for ILD at the First Affiliated Hospital of Guangzhou Medical University from January 2015 to December 2024. The preoperative conditions, intraoperative events, postoperative treatments and prognoses of the first and second lung transplantation were compared, and the postoperative survival of ILD patients after the second lung transplantation was analyzed. Results Among the 14 recipients of the second lung transplant, 13 underwent the procedure due to chronic lung allograft dysfunction, and 1 due to airway complications. The median interval time from the first to the second lung transplant was 32 (2, 80) months. Before the second transplantation, 2 recipients required endotracheal intubation and mechanical ventilation, and 2 required endotracheal intubation, mechanical ventilation, and extracorporeal membrane oxygenation (ECMO) support. The surgical time for the second lung transplantation was longer than that for the first, with increased intraoperative red blood cell and plasma transfusion volumes, the proportion of ECMO support during the second lung transplantation was higher than that during the first (all P<0.05). However, the cold ischemia time for one-sided lung transplant completion in the first lung transplant was similar to that in the second lung transplantation (P>0.05). The median follow-up time after the second lung transplantation was 32 (1, 63) months. The 1-month, 6-month and 1-year survival rates after the second lung transplantation were 79%, 57% and 50%, respectively, with causes of death being infection, multiple organ failure and gastrointestinal bleeding. Conclusions For ILD patients undergoing second lung transplantation after the first lung transplantation, the second lung transplantation is more challenging, with longer surgical time and higher intraoperative blood loss. It requires higher surgical skills and perioperative management. Non-emergency second transplantation may still achieve good results.
2.Syndrome of inappropriate secretion of thyrotropin: Differential diagnosis
Shasha WANG ; Zhizhen LI ; Yanyan ZHAO ; Huijuan ZHANG ; Xialian LI ; Guijun QIN ; Lili ZHENG ; Yanxia LIU ; Mengyang ZHANG ; Feng GUO
Chinese Journal of Endocrinology and Metabolism 2024;40(3):212-218
Objective:Through comprehensive analysis of symptoms and signs, biochemistry, imaging, and dynamic tests, to explore the diagnosis and differential diagnosis of thyrotropin-secreting pituitary adenoma(TSH adenoma) and syndrome of resistance to thyroid hormone(RTH).Methods:A retrospective analysis was conducted on clinical data from 14 patients who visited the First Affiliated Hospital of Zhengzhou University from July 2016 to September 2022, exhibiting elevated levels of free thyroxine(FT4) and free triiodothyronine(FT3) in the presence of increased TSH.Results:There were 7 cases of TSH adenoma and 7 cases of RTH, with the average age of diagnosis at 40.0 years and 26.6 years, respectively. Thirteen patients showed thyrotoxicosis or occasional palpitation, some with pituitary occupancy manifestations or abnormal growth and development; One patient presented with neck thickening. Sex hormone binding globulin was elevated in 3 cases of TSH adenoma. Pituitary magnetic resonance imaging showed that all 7 cases of TSH adenoma were macroadenomas and 1 case of RTH was microadenoma. The octreotide suppression test in 13 patients was inhibited, but there was a significant difference in the inhibition rate of 24 h/2 h TSH inhibition rate of TSH adenoma and RTH, ranging from 46.6% to 83.9% and 4.6% to 28.8% respectively. Six cases of RTH had thyroid hormone receptor β mutation.Conclusion:Syndrome of inappropriate secretion of thyrotropin is a rare condition, mainly including TSH adenoma and RTH. The diagnosis and differentiation of the two conditions require comprehensive assessment incorporating family history, symptoms and signs, laboratory tests, dynamic test, and genetic test. Among these, the 24 h/2 h TSH inhibition rate of octreotide suppression test can effectively distinguish TSH adenoma from RTH.
3.Clinical Landscape of Therapeutic Cancer Vaccines: Challenges and Opportunities
Shupeng LIU ; Mengyang YU ; Xiaofei WU ; Hongyun WANG
Medical Journal of Peking Union Medical College Hospital 2024;15(6):1356-1363
To explore the status and characteristics of clinical trials of therapeutic cancer vaccines, and provide the overall trend of clinical translational research of therapeutic cancer vaccines. The ClinicalTrial registration platform was employed to retrieve relevant clinical trial information of therapeutic cancer vaccines from 2002 to 2023. The current clinical landscape of therapeutic cancer vaccines was analyzed from the perspectives of the number of registrations, types of vaccines, trial design, and geographical distribution. A total of 1563 clinical trials for therapeutic cancer vaccines were obtained from 2002 to 2023, with an average annual registration of approximately 70 trials. Among these, phase Ⅰ trials accounted for 976 (62.4%, 976/1563), phase Ⅱ trials for 474 (30.3%, 474/1563), phase Ⅲ trials for 68 (4.4%, 68/1563), and other types for 45 (2.9%, 45/1563). Clinical trials from phase Ⅰ to phase Ⅲ were conducted in multiple regions worldwide, with multicenter clinical trials totaling 482 (31.8%) and single-center clinical trials totaling 1036 (68.2%). The main types of vaccines were cell vector vaccines (38.7%, 588/1518) and protein/peptide vaccines (34.1%, 518/1518), with the primary research designs being single-arm studies (55.3%, 840/1518) and randomized controlled trials (27.8%, 422/1518). The top five indications for the vaccines were melanoma (16.5%, 251/1518), glioblastoma (8.9%, 135/1518), breast cancer (8.6%, 130/1518), prostate cancer (8.5%, 129/1518), and lung cancer (8.1%, 123/1518). The overall development of clinical trials for therapeutic cancer vaccines has been stable and primarily focused on exploratory trials. The main types of vaccines were cell vector vaccines, and the main research designs were single-arm studies and randomized controlled trials. The vaccines were commonly indicated for melanoma, glioblastoma, and breast cancer. Currently, there are significant challenges in the clinical translation in this field, which may be due to the complexity of the immune microenvironment, patient heterogeneity, and the challenges in vaccine design and preparation. With the application of high-throughput technologies such as proteomics, genomic sequencing, and bioinformatics, it is expected that barriers in the research of therapeutic cancer vaccines would be overcome, thus leading to a better clinical translation landscape.
4.Clinical Landscape of Therapeutic Cancer Vaccines: Challenges and Opportunities
Shupeng LIU ; Mengyang YU ; Xiaofei WU ; Hongyun WANG
Medical Journal of Peking Union Medical College Hospital 2024;15(6):1356-1363
To explore the status and characteristics of clinical trials of therapeutic cancer vaccines, and provide the overall trend of clinical translational research of therapeutic cancer vaccines. The ClinicalTrial registration platform was employed to retrieve relevant clinical trial information of therapeutic cancer vaccines from 2002 to 2023. The current clinical landscape of therapeutic cancer vaccines was analyzed from the perspectives of the number of registrations, types of vaccines, trial design, and geographical distribution. A total of 1563 clinical trials for therapeutic cancer vaccines were obtained from 2002 to 2023, with an average annual registration of approximately 70 trials. Among these, phase Ⅰ trials accounted for 976 (62.4%, 976/1563), phase Ⅱ trials for 474 (30.3%, 474/1563), phase Ⅲ trials for 68 (4.4%, 68/1563), and other types for 45 (2.9%, 45/1563). Clinical trials from phase Ⅰ to phase Ⅲ were conducted in multiple regions worldwide, with multicenter clinical trials totaling 482 (31.8%) and single-center clinical trials totaling 1036 (68.2%). The main types of vaccines were cell vector vaccines (38.7%, 588/1518) and protein/peptide vaccines (34.1%, 518/1518), with the primary research designs being single-arm studies (55.3%, 840/1518) and randomized controlled trials (27.8%, 422/1518). The top five indications for the vaccines were melanoma (16.5%, 251/1518), glioblastoma (8.9%, 135/1518), breast cancer (8.6%, 130/1518), prostate cancer (8.5%, 129/1518), and lung cancer (8.1%, 123/1518). The overall development of clinical trials for therapeutic cancer vaccines has been stable and primarily focused on exploratory trials. The main types of vaccines were cell vector vaccines, and the main research designs were single-arm studies and randomized controlled trials. The vaccines were commonly indicated for melanoma, glioblastoma, and breast cancer. Currently, there are significant challenges in the clinical translation in this field, which may be due to the complexity of the immune microenvironment, patient heterogeneity, and the challenges in vaccine design and preparation. With the application of high-throughput technologies such as proteomics, genomic sequencing, and bioinformatics, it is expected that barriers in the research of therapeutic cancer vaccines would be overcome, thus leading to a better clinical translation landscape.
5.Advances in the study of epigenetic regulatory mechanisms of astrocytes
Liuqing XU ; Peiyuan ZHAO ; Xihong LIU ; Xiaodan DU ; Mengyang FAN ; Junlin HOU
Chinese Journal of Comparative Medicine 2024;34(5):126-133
Astrocytes(AS)are the most abundant glial cells in the central nervous system and are involved in many physiological and pathological processes in the nervous system.Alterations in their phenotype are particularly important for the health of the CNS.Epigenetic mechanisms,including DNA methylation,histone modification,non-coding RNA regulation,and chromatin remodeling,are closely linked to alterations in AS proliferation,differentiation,inflammation,and other phenotypic features,but how these mechanisms function needs to be explored and summarized.By reviewing the recent advances in the role of epigenetic mechanisms in AS under various physiological and pathological states,we aim to provide new ideas for the understanding and treatment of related diseases.
6.Construction of Longitudinal Comprehensive Evaluation Model of Disease Treatment Quality and Its Application in CIS
Lei YU ; Mengyang LIU ; Chao WANG
Chinese Journal of Health Statistics 2024;41(5):662-666,670
Objective Construct a longitudinal comprehensive evaluation model of disease treatment quality to evaluate the quality of treatment for cerebral ischemic stroke(CIS).Methods The latent variable measurement model was combined with polynomial and multilevel regression to establish a longitudinal comprehensive evaluation model of disease treatment quality,the MCMC was used for parameter estimation.Simulation studies were conducted to determine the applicable conditions of the model,the accuracy of model parameter estimation was evaluated by root mean square error and rank correlation coefficient,the results were compared with the latent growth curve model(LGCM).Results A comprehensive model that can be used to evaluate the longitudinal change,trend change and the impact of covariates in the quality of disease care was constructed.The number of evaluation objects has a little effect on the model effect.When the number of observation time was 6 and the number of evaluation indicators was 20,the model could obtain the treatment quality and change trend of the evaluation object at different time points.The mean rank correlation coefficient between the estimated value of treatment quality and the true value was 0.8128,which was higher than that of LGCM(0.7610).The mean RMSE between the estimated value of the covariate regression coefficient and the true value was 0.3756,which was lower than that of LGCM(0.448).The more observation time and evaluation indexes,the more accurate the longitudinal comprehensive evaluation model was,and it was always higher than LGCM.From 2011 to 2016,the average CIS quality of care comprehensive score of hospitals increased by 0.9256,secondary and tertiary hospitals increased by 0.9432 and 1.321,teaching and non-teaching hospitals increased by 1.4904 and 1.1155.Conclusion The longitudinal comprehensive evaluation model can comprehensively and reasonably evaluate the quality of disease treatment and its longitudinal changes,and analyze the impact of differences in evaluation objects on the change trend.The quality of CIS treatment in China is generally good,and the changing trend is affected by the level of hospitals and teaching status.The results of this study can provide reference for the subsequent development of targeted treatment quality intervention measures and continuous improvement of treatment quality.
7.Over the top reconstruction combined with modified Lemaire technique in the treatment of anterior cruciate ligament injury with pivot-shift positive
Xianxiang XIANG ; Ruixin LI ; Jia LIU ; Zhiheng WEI ; Jue GONG ; Chunhui LI ; Wanqing QI ; Mengyang JIA ; Weiyi CHEN ; Ying YANG ; Weiming WANG
Chinese Journal of Orthopaedics 2024;44(7):438-446
Objective:To investigate the clinical efficacy of over-the-top reconstruction combined with the modified Lemaire technique in the treatment of anterior cruciate ligament (ACL) injuries with pivot-shift positive.Methods:From March 2020 to October 2021, a total of 46 patients with ACL injury and pivot-shift test grade II or above were admitted to Xinhua Hospital Affiliated to Dalian University. There were 28 males and 18 females, aged 28.0±10.5 years (range, 15-45 years). All cases were unilateral, including 17 cases of left knee and 29 cases of right knee. The pivot-shift test showed that 30 cases were grade II and 16 cases were grade III, and the cause of injury was sports injury. The semitendinosus muscle and gracilis muscle were harvested, and the ACL was reconstructed with the over-the-top combined modified Lemaire technique. The International Knee Documentation Committee (IKDC) score, Lysholm score and KT-2000 side-to-side difference before and after operation were compared.Results:All patients successfully completed the operation and were followed up for 26.6±2.3 months (range, 24-28 months). The Lysholm scores of the patients at 3 months and 24 months after operation were 73.6±4.3 and 91.6±2.8, which were higher than those before operation (58.5±4.6), and the difference was statistically significant ( F=18.351, P<0.001). The IKDC scores of patients at 3 months and 24 months after operation were 59.0±2.0 and 91.8±3.2, respectively, which were higher than those before operation 50.3±2.8, and the difference was statistically significant ( F=17.290, P<0.001). The side-to-side difference of KT-2000 was 1.7±0.8 mm and 1.5±0.4 mm at 3 and 24 months after operation, respectively, which was lower than that before operation (5.9±1.1 mm), and the difference was statistically significant ( F=14.192, P<0.001). At 24 months after operation, 3 patients had pivot shift test grade I and 4 patients had Lachman test grade I, but they complained of good knee stability and did not receive further treatment. At the last follow-up, there were no complications such as incision and intra-articular infection, deep vein thrombosis, knee stiffness, quadriceps musculus ossificans myositis, and reconstruction ligament rupture. All patients returned to sports with an average time of 15.7±2.6 months (range, 12-24 months). Conclusion:Over-the-top reconstruction combined with the modified Lemaire technique for the treatment of ACL injury with positive pivot shift test effectively improves knee function and promotes the patient's return to sports, with a low incidence of surgical complications.
8.A study on the characteristics of high-resolution anorectal manometry in patients with functional anorectal pain
Hongyan ZHENG ; Fan LIU ; Mengyang SUN ; Jin LIU ; Chengjing FENG ; Min NI
Chinese Journal of Digestion 2024;44(4):250-256
Objective:To explore the characteristics of anorectal motility and sensation in patients with functional anorectal pain (FAP) by high-resolution anorectal manometry (HR-ARM) .Methods:The clinical data of 81 FAP patients (FAP group) who underwent HR-ARM in Nanjing Hospital of Chinese Medicine Affiliated to Nanjing University of Chinese Medicine from January 1, 2020 to January 31, 2022 were retrospectively collected, and 80 healthy volunteers were recruited as healthy control group during the same period. The HR-ARM characteristics were compared between FAP group and the healthy control group, between the patients with different genders in the FAP group, the patients with different subtypes (proctalgia fugax, levator syndrome, and non-specific FAP) in the FAP group, which included anal resting pressure, anal squeeze pressure, rectal pressure during simulated defecation, anal residual pressure during simulated defecation, paradoxical contractions, initial sensation threshold, defecation threshold, defecation urgency threshold, and tolerance threshold. Visual analogue scale (VAS) was used to assess the pain level of the patients in the FAP group, and Spearman correlation analysis was used to analyze the correlation between VAS and HR-ARM characteristics. Independent sample t-test, least significant difference test, Tamhane′s T2 test, and Mann-Whitney U test were used for statistical analysis. Results:The anal resting pressure, anal squeeze pressure, anal residual pressure during simulated defecation, defecation urgency threshold, and tolerance threshold of the FAP group were all lower than those of the healthy control group ((59.56±24.71) mmHg (1 mmHg=0.133 kPa) vs. (81.94±15.87) mmHg, (119.04±46.94) mmHg vs.(154.62±37.95) mmHg, 59.00(40.75, 80.95) mmHg vs. 83.10(61.78, 94.30) mmHg, 70.00(55.00, 90.00) mL vs. 85.00(60.00, 110.00) mL, 105.00(87.50, 150.00) mL vs. 140.00(100.00, 180.00) mL), and the differences were all statistically significant ( t=-6.83 and -5.29, Z=-4.12, -3.12 and -2.82; all P<0.01).The rectal pressure during simulated defecation of male patients in the FAP group was higher than that of males in the healthy control group, and the defecation urgency threshold was lower than that of males in the healthy control group (42.40(29.60, 57.95) mmHg vs. 31.10(25.85, 36.80) mmHg, 80.00(62.50, 107.50) mL vs. 92.00(81.00, 140.00) mL), and the differences were statistically significant ( Z=-1.99 and -2.53, both P<0.05). The anal resting pressure, anal squeeze pressure, anal residual pressure during simulated defecation, defecation urgency threshold, and tolerance threshold of female patients in FAP group were all lower than those of female in the healthy control group ((55.67±21.61) mmHg vs. (87.04±15.54) mmHg, (102.70±37.09) mmHg vs. (155.98±31.44) mmHg, 52.55(40.53, 67.48) mmHg vs. 83.10(61.10, 94.50) mmHg, 60.00(52.50, 81.50) mL vs. 80.00(60.00, 100.00) mL, 101.00(80.00, 128.75) mL vs. 120.00(94.00, 155.00) mL), and the differences were statistically significant ( t=-8.77 and -8.16, Z=-4.57, -2.24 and -2.14; all P<0.05). The anal resting pressure, anal squeeze pressure, anal residual pressure during simulated defecation, incidence rate of paradoxical contractions, defecation urgency threshold, and tolerance threshold of female patients in FAP group were all lower than those of male patients in FAP group ((55.67±21.61) mmHg vs. (68.28±29.16) mmHg, (102.70±37.09) mmHg vs. (155.62±46.66) mmHg, 52.55(40.53, 67.48) mmHg vs. 79.00(59.55, 99.25) mmHg, 28.6%(16/56) vs. 68.0%(17/25), 44.00(35.00, 60.00) mL vs. 60.00(45.00, 70.00) mL, 60.00(52.50, 81.50) mL vs. 80.00(62.50, 107.50) mL), and the differences were statistically significant( t=2.17 and 5.47, Z=-2.96, χ2=11.10, Z=-2.93 and -2.34; all P<0.05). The anal squeeze pressure of patients with proctalgia fugax subtype was higher than that of patients with levator syndrome subtype ((140.19±56.51) mmHg vs. (80.56±30.79) mmHg), and the tolerance threshold was lower than that of patients with non-specific FAP subtype ((87.86±17.80) mL vs. (125.14±48.31) mL), and the differences were statistically significant ( t=2.35 and 2.02, both P<0.05). The results of Spearman correlation analysis showed that VAS was negatively correlated with anal resting pressure, anal squeeze pressure, and defecation urgency threshold in the patients of the FAP group ( r= -0.28, -0.23, and -0.24; all P< 0.05). Conclusion:The presence of anorectal dismotility and sensory dysfunction in FAP may be related to pelvic floor muscle abnormalities, muscle coordination disorders during defecation, and rectal hypersensitivity.
9.Evolution in the indications for anti-viral therapy in chronic hepatitis B
Jinjin LIU ; Mengyang ZHANG ; Yameng SUN ; Hong YOU
Journal of Clinical Hepatology 2023;39(6):1299-1303
In order to reduce the disease burden of chronic hepatitis B (CHB) and improve the treatment rate of CHB, the indications for anti-viral therapy have been gradually expanded and simplified in guidelines for the prevention and treatment of CHB released by Chinese Medical Association from 2005 to 2022. This article elaborates on the evolution in the indications for anti-viral therapy in CHB from the five aspects of converging indications of HBeAg-positive and HBeAg-negative CHB, reduction in the treatment threshold of HBV DNA, reduction in the treatment threshold of serum alanine aminotransferase, emphasis on the risk factors for disease progression, and gradual loosening of the requirements for virological indicators in patients with liver cirrhosis.
10.Summary of best evidence for the management of thirst in ICU patients
Mengyang HU ; Haiyan HUANG ; Jian LUO ; Yuanyuan MI ; Yunhan DING ; Yang LIU ; Yingying MENG ; Wei WU ; De JIN
Chinese Journal of Practical Nursing 2023;39(17):1355-1361
Objective:To summarize the best evidence of thirst management in ICU patients and provide evidence-based basis for dinical practice.Method:According to the "6S" evidence pyramid model, the literature on thirst management of ICU patients was systematically retrieved from relevant guidelines websites, evidence-based databases, association websites and original literature databases at home and abroad. The retrieval time was from the establishment of the database to June 31, 2022. Two researchers with evidence-based nursing training independently completed literature quality evaluation. To extract and summarize the evidence of the literature that meets the quality standard.Results:A total of 17 articles were included, including 8 randomized controlled trials, 5 quasi-experimental studies and 4 cross-sectional studies. The 18 pieces of best evidence were formed, including 5 aspects: basic requirements of thirst management, intervention evaluation, intervention methods, matters needing attention and health education.Conclusions:This study summarized the best evidence of thirst management in ICU patients. Nurses should translate and apply the best evidence in combination with the clinical situation and specific policies of the department to relieve the thirst symptoms of ICU patients.

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