BACKGROUND:Previous studies of the research group have found that icariin-containing serum can delay the progression of knee osteoarthritis,promote chondrocyte proliferation and stem cell cartilage differentiation in rats,but there is still a lack of sufficient basis for clinical application.OBJECTIVE:To investigate the repair effect of icariin-containing serum on lipopolysaccharide-induced inflammatory damage of human chondrocytes.METHODS:The effect of icariin-containing serum on chondrocyte viability was detected by cell counting kit-8 method,and the optimal volume fraction and time of icariin-containing serum were screened.The cells were then divided into blank group,lipopolysaccharide group,icariin-containing serum group and lipopolysaccharide+icariin-containing serum group.After grouping,immunofluorescence was used to detect the secretion of type Ⅱ collagen in chondrocytes in each group.Real-time PCR was used to detect the expression of related genes.RESULTS AND CONCLUSION:(1)Icariin-containing serum showed good biosafety characteristics for human chondrocytes,and the cell viability reached the highest level after 48 hours of intervention when the icariin-containing serum volume fraction was 15％,and the follow-up experiments were carried out according to the conditions.(2)Compared with the blank group,lipopolysaccharide significantly inhibited the expression of type Ⅱ collagen in chondrocytes,while icariin-containing serum showed a positive mobilization effect,which could effectively promote the secretion of type Ⅱ collagen in chondrocytes under normal and inflammatory conditions.(3)The mRNA expression of type Ⅱ collagen and Aggrecan in chondrocytes decreased significantly under lipopolysaccharide stimulation,and the mRNA expression levels of matrix metalloproteinase 13 and a disintegrin-like and metalloproteinase with thrombospondin motifs-5 increased significantly.Icariin-containing serum promoted the mRNA expression of type Ⅱ collagen in human chondrocytes under inflammatory conditions and reduced the mRNA expression of matrix metalloproteinase 13 and a disintegrin-like and metalloproteinase with thrombospondin motifs-5 in chondrocytes after lipopolysaccharide intervention.Therefore,these findings indicate that the icariin-containing serum has good safety for human chondrocytes and plays an important role in maintaining the normal physiological functions of chondrocytes,promoting the synthesis of extracellular matrix,and inhibiting the secretion of inflammatory factors.

BACKGROUND:Previous studies of the research group have found that icariin-containing serum can delay the progression of knee osteoarthritis,promote chondrocyte proliferation and stem cell cartilage differentiation in rats,but there is still a lack of sufficient basis for clinical application.OBJECTIVE:To investigate the repair effect of icariin-containing serum on lipopolysaccharide-induced inflammatory damage of human chondrocytes.METHODS:The effect of icariin-containing serum on chondrocyte viability was detected by cell counting kit-8 method,and the optimal volume fraction and time of icariin-containing serum were screened.The cells were then divided into blank group,lipopolysaccharide group,icariin-containing serum group and lipopolysaccharide+icariin-containing serum group.After grouping,immunofluorescence was used to detect the secretion of type Ⅱ collagen in chondrocytes in each group.Real-time PCR was used to detect the expression of related genes.RESULTS AND CONCLUSION:(1)Icariin-containing serum showed good biosafety characteristics for human chondrocytes,and the cell viability reached the highest level after 48 hours of intervention when the icariin-containing serum volume fraction was 15％,and the follow-up experiments were carried out according to the conditions.(2)Compared with the blank group,lipopolysaccharide significantly inhibited the expression of type Ⅱ collagen in chondrocytes,while icariin-containing serum showed a positive mobilization effect,which could effectively promote the secretion of type Ⅱ collagen in chondrocytes under normal and inflammatory conditions.(3)The mRNA expression of type Ⅱ collagen and Aggrecan in chondrocytes decreased significantly under lipopolysaccharide stimulation,and the mRNA expression levels of matrix metalloproteinase 13 and a disintegrin-like and metalloproteinase with thrombospondin motifs-5 increased significantly.Icariin-containing serum promoted the mRNA expression of type Ⅱ collagen in human chondrocytes under inflammatory conditions and reduced the mRNA expression of matrix metalloproteinase 13 and a disintegrin-like and metalloproteinase with thrombospondin motifs-5 in chondrocytes after lipopolysaccharide intervention.Therefore,these findings indicate that the icariin-containing serum has good safety for human chondrocytes and plays an important role in maintaining the normal physiological functions of chondrocytes,promoting the synthesis of extracellular matrix,and inhibiting the secretion of inflammatory factors.

BACKGROUND: Meningeal metastasis (MM) is a form of malignant metastasis where tumor cells spread from the primary site to the pia mater, dura mater, arachnoid, subarachnoid space, and other cerebrospinal fluid compartments. Lung cancer is one of the most common malignant tumor types with MM. MM not only signifies that the lung cancer has progressed to an advanced stage but also leads to a range of severe clinical symptoms due to meningeal involvement. Currently, the risk factors associated with the development of MM are not fully elucidated. The aim of this study was to investigate the risk factors for MM in patients with lung adenocarcinoma (LUAD) who underwent non-surgical interventions, in order to identify LUAD patients at high risk for MM. METHODS: This retrospective study analyzed the clinical data of patients diagnosed with LUAD at the First Affiliated Hospital of Zhengzhou University from January 2020 to July 2024. Missing data were imputed using multiple imputation methods, and risk factors were identified through LASSO, univariate, and multivariate Logistic regression analyses. RESULTS: A total of 170 patients with LUAD were included in this study and divided into two groups: 87 patients with MM and 83 patients without MM. Univariate and multivariate Logistic regression analyses revealed that younger age at diagnosis (P=0.004), presence of the epidermal growth factor receptor (EGFR) L858R gene mutation (P=0.008), and concurrent liver metastasis at baseline (P=0.004) were independent risk factors for developing MM in LUAD patients who did not undergo surgical intervention. Conversely, higher baseline globulin levels (P=0.039) and the presence of the anaplastic lymphoma kinase (ALK) gene mutation (P=0.040) were associated with a reduced risk of MM development. CONCLUSIONS Age at diagnosis, EGFR L858R mutation status, ALK gene mutation status, concurrent liver metastasis, globulin levels at baseline were significantly associated with the risk of developing MM in patients with LUAD patients who did not undergo surgical intervention. For patients diagnosed at a younger age, carrying the EGFR L858R mutation, or presenting with baseline liver metastasis, early implementation of tertiary prevention strategies for MM is crucial. Regular monitoring of MM status should be conducted in these high-risk groups.
Humans ; Male ; Adenocarcinoma of Lung/therapy* ; Female ; Middle Aged ; Risk Factors ; Lung Neoplasms/therapy* ; Retrospective Studies ; Aged ; Meningeal Neoplasms/genetics* ; Adult

[摘 要] 目的：探究地塞米松联合阿比特龙对去势抵抗性前列腺癌（CRPC）患者尿流动力学、外周血循环肿瘤细胞雄激素受体剪切变异体7（AR-V7）、人同源盒基因B13（HoxB13）水平及生存预后的影响。方法：回顾性选取本院收治的114例CRPC患者病历资料，根据治疗方案分为对照组（予以0.5 mg地塞米松治疗，n = 51）和观察组（予以0.5 mg地塞米松联合1 000 mg阿比特龙治疗，n = 63）。比较两组疗效、尿动力学、外周血循环肿瘤细胞AR-V7、HoxB13水平以及生存预后。结果：观察组63例，对照组51例。治疗8周后，观察组疾病控制率与客观缓解率（分别为42.86%与96.83%）均显著高于对照组（分别为23.53%与86.27%）（P < 0.05）。观察组的最大尿流率[（14.58 ± 1.02）mL/s vs （11.18 ± 1.16）mL/s）]、平均尿流率[（12.92 ± 1.21）mL/s vs （9.83 ± 0.59）mL/s）]均显著高于对照组，而剩余尿量[（24.12 ± 1.96）mL vs （28.03 ± 1.68）mL）]显著低于对照组（均P < 0.05）。观察组与对照组的AR-V7 mRNA表达水平相近[（1.78 ± 0.32） vs （1.68 ± 0.46）]，差异无统计学意义（P > 0.05）；但观察组的HoxB13 mRNA表达水平显著低于对照组[（1.21 ± 0.27） vs （1.57 ± 0.37），P < 0.05]。观察组的中位无进展生存期[6.22个月（95%CI：5.63~6.63）]显著长于对照组[3.66个月（95%CI：3.01~3.74）]（P < 0.05）；观察组的3年总生存率为12.70%，显著高于对照组的0.00%（P < 0.05）。结论：地塞米松联合阿比特龙治疗CRPC患者具有显著疗效，能明显改善患者尿流动力，下调外周血循环肿瘤细胞中HoxB13的表达，未显著影响AR-V7的表达，还能延长患者PFS，提高3年总生存率。

Objective:To investigate the application value of combined detection of urine genes Twist1,Onecut2,VIM methyl-ation and folate metabolism related genes MTHFR(C677T/A1298C),MTRR(A66G)polymorphisms in the screening and diagnosis of bladder cancer.Methods:A total of 134 patients with primary bladder cancer admitted to the Department of Urology of Qingyang Peo-ple's Hospital and the Second Hospital of Lanzhou University from January 2023 to January 2024 were selected(bladder cancer group),and a total of 130 patients with common benign urinary system diseases and other malignant tumors of urinary system treated with cystoscopy were admitted during the same period(control group).Methylation-specific polymerase chain reaction was used to de-tect the methylation of Twist1,Onecut2 and VIM genes in urine shed cells.PCR fluorescence probe fusion was used to detect the poly-morphism of folate metabolism-related genes in peripheral blood of patients,and collected the clinical data and immunological indica-tors,and to all the data for statistical analysis.Results:The methylation rates of hematuria,bladder irritation,Twist1,Onecut2 and VIM genes were significantly different between two groups(P<0.05).The area under ROC curve(AUC)of Twist1,Onecut2 and VIM genes methylation and their combined detection were 0.721,0.675,0.674 and 0.772,respectively.Sensitivity and specificity were 73.20%and 71.00%,56.10%and 79.00%,48.80%and 86.00%,80.50%and 69.00%,respectively.The AUC of hematuria and blad-der irritation were 0.661 and 0.652.The sensitivity and specificity were 60.20%and 72.00%,41.50%and 89.00%,respectively.The combined AUC of all indicators were the largest(0.858),and the sensitivity and specificity were higher.The frequencies of CC,CT,TT,and T alleles of MTHFR C677T in bladder cancer group were 21.64%,41.79%,36.56%and 57.46%,respectively.Compared with the control group,the difference was statistically significant(P<0.05).The T allele frequency was significantly different between methylated and unmethylated Twist1 groups(P<0.05).Others differences were not statistically significant,and there was no signifi-cant association with gene methylation(P>0.05).Conclusion:The methylation of Twist1,Onecut2 and VIM genes are highly ex-pressed in the urine cells of patients with bladder cancer,and the combination of hematuria and bladder irritation has a high predictive value for the diagnosis of bladder cancer.The MTHFR(C677T)T allele is associated with the methylation of Twist1 gene and may be one of the risk factors for bladder cancer.

Objective: To investigate the regional differences in the incidence of urothelial carcinoma among kidney transplant recipients between northern and southern China，so as to provide reference for early diagnosis of this disease. Methods: A comprehensive search was conducted across multiple databases，including CNKI，Wanfang，CBM，and PubMed，using the keywords “kidney transplantation” and “tumor” to collect clinical data from qualified kidney transplant centers.The latest and most complete literature data published by 17 transplant centers in northern China and 14 in southern China were included.Statistical analyses were performed to compare the incidence of post-transplant urothelial carcinoma and non-urothelial malignancies. Results: A total of 37 475 kidney transplant recipients were included，among whom 837 (2.23%) developed post-transplant malignancies，including urothelial carcinoma (366/837，43.73%)，non-urothelial carcinoma (444/837，53.05%)，and malignancies with unspecified pathology (27/837，3.23%).The incidence of malignancies was significantly higher in northern China than in southern China [(2.82±1.39)% vs. (1.67±0.83)%，P=0.011]，with a particularly pronounced difference in the incidence of urothelial carcinoma [(1.68±1.12)% vs. (0.32±0.32)%，P<0.001].No significant difference was observed in the incidence of non-urothelial carcinoma between the two regions [(1.11±0.56)% vs. (1.35±0.65)%，P=0.279].Additionally，female transplant recipients exhibited a higher incidence of malignancies than males in both regions (southern China：2.38% vs. 1.80%; northern China：8.93% vs. 2.52%). Conclusion: The incidence of urothelial carcinoma following kidney transplantation is significantly higher in northern China than in southern China，underscoring the importance of implementing regular tumor screening for kidney transplant recipients，particularly for female patients in northern China，to facilitate early diagnosis and timely intervention.

Objective:To investigate the clinical application value of a novel filter's retraction hook capture technique of pull-assisted method for the endovascular retrieval of conical inferior vena cava (IVC) filters whose hook attached to the wall.Methods:From January 2020 to December 2024, patients with conical filters whose hook attached to the wall admitted at Beijing Jishuitan Hospital were enrolled consecutively.Results:A total of 46 patients underwent filter retrieval using filter's retraction hook capture technique of pull-assisted method. Among these patients, 39 cases (84.8%) were successful in filter retrieval, with the penetration distance of cranial anchor vertex of 3.3(2.5, 4.4) mm, and 13 (33.3%) filters were deformed. The other 7 cases were unsuccessful, with a penetration distance of cranial anchor vertex of 5.0 (4.3, 5.0) mm, and 6 (85.7%) filters were deformed. There was a statistically significant difference between the two groups ( P<0.05). One case (2.2%) had IVC injury, one case (2.2%) experienced filter fracture, and no symptomatic pulmonary embolism occurred. Logistic regression analysis showed that filter deformation was an independent dangerous factor for filter's retraction. Conclusions:Filter's retraction hook capture technique of pull-assisted method is effective in removing conical filters whose hook attached to the wall, with no symptomatic PE occurring. This method can be considered as a new adjuvant technique for filter retrieval.

Objective:To evaluate the mediating effect of electrocardiographic (ECG) indicators in the association between short-term exposure to fine particulate matter (PM 2.5) and blood pressure and to explore the key PM 2.5 element constituents that produce the mediating effect. Methods:Based on a cross-sectional survey across 10 cities in the Beijing-Tianjin-Hebei region and surrounding areas, PM 2.5 and its element constituents were collected from the nearest air monitoring superstation. Blood pressure and ECG indicators of participants were obtained through physical examinations. A multivariate linear regression was used to evaluate the effect of short-term exposures to PM 2.5 on blood pressure. A mediation analysis was used to identify the mediating effect of ECG indicators in the association between exposure to PM 2.5 and its element constituents and blood pressure. Results:The age of the 1 793 participants was (65.1±13.3) years, and 885 (49.4%) were males. During the study period, the daily mean concentration of PM 2.5 was (70±45) μg/m 3, and the systolic blood pressure (SBP), diastolic blood pressure (DBP), mean arterial pressure (MAP) and pulse pressure (PP) were (139±20), (82±11), (101±13), and (57±17) mmHg (1 mmHg=0.133 kPa), respectively. The results of the multivariate linear regression showed that for every 10 μg/m 3 increase in PM 2.5 on the same day (lag 0), DBP increased by 0.15 (95% CI: 0.02-0.28) mmHg, and PP decreased 0.18 (95% CI: 0.36-0.01) mmHg. The exposure to 14 elemental constituents, such as Ga, Co and Se, was associated with an increase in DBP, while the exposure to 17 elemental constituents, such as Cs, Se and Ag, was associated with a decrease in PP. At lag 0, the PM 2.5-induced increase in DBP was mediated by the QRS interval (mediation percentage of 18.98%), and the PM 2.5-induced decrease in PP was mediated by the QT interval (mediation percentage of -6.31%). The exposure to K, Br, Pb, Zn, Ca, Co, Pd, Cu, and As constituents was associated with increases in DBP mediated by prolonged QRS interval. The exposure to Pb, Zn, K, and As constituents was associated with decreases in PP mediated by prolonged QRS interval. Conclusion:ECG indicators such as QRS interval may mediate the association between short-term exposure to PM 2.5 and its element constituents and blood pressure.