Objective To establish a method for determination of oleanolic acid in Cortex Aralia Elatae by HPLC.Methods The determination was carried out with Kromasil C18 column(250 mm?4.6 mm,5 ?m),using acetonitrile-water-phosphoric acid(80∶20∶0.42) as the mobile phase and detected at the wavelength of 208 nm.Results Oleanolic acid showed a good linear relationship at the range of 1.164～5.820 ?g,r=0.999 9.The average recovery was 99.70% and RSD was 1.76%(n =5).Conclusion The method was simple and accurate with good reproducibility,and can be used to determine the content of oleanolic acid in Cortex Aralia Elatae.

Objective To optimize the conditions for the percolation extraction process of Panax notoginseng(Burk.) F.H.Chen.Methods Conditions for the percolation were studied by orthogonal experimental design as guided by the contents of total notoginseng saponin and total amino acids.Results The percolate rate,concentration and quantity of alcohol had significant effects on the process.Conclusion The optimum condition for the extraction of Panax notoginseng was adding 12 times amount of 50% alcohol and percolating at a rate of 1～3 mL/(min?kg).

OBJECTIVE:To determine the content of phenolic acids from Anemone altica,and optimize its extraction technolo-gy. METHODS:HPLC was used to determine the contents of mono-ferulyl tartaric acid and ferulic acid from A. altica;using the total contents of 2 index components as index,volume fraction of extraction solvent,extraction solvent volume,extraction times and extraction time as factors,orthogonal test was used to optimize extraction technology,and verification test was conducted. RE-SULTS:The contents of mono-ferulyl tartaric acid and ferulic acid were 0.059%,0.0025%,respectively;the optimal extraction technology was as follow as 30% ethanol 600 mL added to 20 g medicinal material,extracted twice,90 min every time. In verifi-cation test,the average contents of 2 components in extract were 0.2971%(RSD=3.64%,n=3),0.0041%(RSD=5.11%,n=3). CONCLUSIONS:A method for contents determination of mono-ferulyl tartaric acid and ferulic acid from A. altica is estab-lished;optimized extraction technology is stable and feasible.

Objective: To investigate the expressions of serum miRNA-126 (miR-126) and miRNA-30c (miR-30c) in patients with pancreatic cancer, and to analyze the relationship with the occurrence of pancreatic cancer as well as the diagnostic value. Methods: A total of 110 patients with pancreatic cancer diagnosed at the 928th Hospital of the Joint Service Support Force of PLA from January 2014 to December 2018 were selected, and 110 healthy people were also selected as the control group. The expression levels of serum miR-126 and miR-30c of 110 patients and the healthy controls were detected by using real-time quantitative polymerase chain reaction (qRT-PCR), and their relationship with clinicopathological features of pancreatic cancer was analyzed. Results: The levels of serum miR-126 and miR-30c in pancreatic cancer group were lower than those in the healthy control group (0.43±0.12 vs. 1.02±0.27, t = 19.394, P < 0.01; 0.52±0.17 vs. 1.04±0.31, t = 15.426, P < 0.01). There was a positive correlation between levels of serum miR-126 and miR-30c in patients with pancreatic cancer (r = 0.399, P < 0.01). Expression levels of serum miR-126 and miR-30c were not correlated with age, gender and body mass index (BMI) of pancreatic cancer patients (all P > 0.05), but related with tumor size, differentiation degree, TNM stage and lymph node metastasis (all P < 0.05). High expression levels of serum miR-126 and miR-30c were protective factors for pancreatic cancer (all P < 0.05), while smoking, drinking and gallstones were risk factors for pancreatic cancer (all P < 0.05). The area under the curve of combined detection of serum miR-126 and miR-30c for diagnosis of pancreatic cancer was 0.906, the sensitivity was 90.80%, and the specificity was 82.20%. Conclusions The expression levels of serum miR-126 and miR-30c in patients with pancreatic cancer are low. Both of them may be involved in the occurrence and development of pancreatic cancer, and may be used as early diagnostic markers of pancreatic cancer.

Objective:This study investigated the association between Yes-associated protein and WW domain-containing transcription regulator protein 1(YAP/TAZ) and the in-hospital surgical mortality rate of STAAD patients.Methods:The mouse β-aminopropionitrile monofumarate(BAPN) model was used to test the level of YAP/TAZ. From July 2016 to December 2016, the blood samples of 139 people who received routine physical examinations consecutively Beijing Anzhen Hospital were included as the control group.According to the inclusion and exclusion requiement, 95 consecutive patients with STAAD who underwent surgery in Beijing Anzhen Hospital during the same period, were involved in the final cohort study. The main outcome measure was in-hospital death. Their blood samples were regarded as the test group. The predictors of postoperative in-hospital death were confirmed by univariate regression analysis. Multivariable logistic regressions were used to analyze the association of the preoperative plasma level of TAZ and the postoperative in-hospital mortality of STAAD patients.Results:The YAP level showed less change in blood samples of both STAAD patients and the BAPN-induced STAAD mice compared to that of the sham control, while TAZ concentration experienced a significant increase. In the crude model, TAZ showed a positive correlation with in-hospital death( OR=1.327, 95% CI: 1.014-1.737, P=0.0392). In adjusted model Ⅰ and adjusted modelⅡ, similar results were found( OR=1.348, 95% CI: 1.010-1.803, P=0.0429; OR=1.353, 95% CI: 1.008-1.816, P=0.0442). Conclusion:The high level of TAZ in the blood suggested poor surgical prognosis for STAAD patients, and patients with a TAZ level ≥13 ng/ml had much higher mortality.

Objective:To explore the risk factors of ischemic stroke after coronary artery bypass grafting(CABG) in elderly(≥75 years old)patients, establish a risk prediction model and evaluate it.Methods:From January 2015 to September 2021, a total of 1 553 elderly patients with coronary artery disease who were admitted to Beijing Anzhen Hospital for coronary artery bypass grafting were included retrospectively. Among which 1 121(72%) cases were males, with a median age of 77( IQR 75, 78) years. Clinical data were collected and univariate analysis and multiple logistic regression analysis were used to explore the risk factors of ischemic stroke after CABG in elderly patients. After the establishment of risk prediction model, we constructed the nomogram, and tested the discrimination and calibration of the model. Results:All patients underwent CABG, there were 35 patients with ischemic stroke after operation, with an incidence of 2.25%(35/1 553). Multivariate logistic regression analysis showed that diabetes( OR=2.61, 95% CI: 1.31-5.32), old myocardial infarction( OR=3.62, 95% CI: 1.61-7.63), systolic blood pressure( OR=1.03, 95% CI: 1.01-1.04) and vertebral artery stenosis( OR=1.01, 95% CI: 1.00-1.02) were independent risk factors for postoperative cerebral infarction in patients undergoing CABG. The model was presented by a nomogram, and the model discrimination was evaluated by ROC curve. The area under the curve( AUC) was 0.757, indicating a optimal discrimination. Hosmer- Lemeshow test of goodness of fit was performed to evaluate the model calibration( χ2=6.209, P=0.624). Conclusion:Diabetes mellitus, old myocardial infarction, systolic blood pressure and vertebral artery stenosis are independent risk factors for ischemic stroke in elderly patients after CABG. The established risk prediction model has optimal discrimination and calibration.

Objective    To explore the risk factors for 24-hour death in acute type A aortic dissection (ATAAD) patients with conservative treatment. Methods    From January 2009 to January 2018, 243 ATAAD patients who received non-surgical intervention were admitted in Beijing Anzhen Hospital, including 167 males and 76 females with an average age of 53.0±12.0 years. The risk factors for 24-hour mortality were analyzed. Results    The total in-hospital mortality rate was 37.9% (93/243), and 13.6% (33/243) patients died within 24 hours of onset. We found that left ventricular end diastolic diameter [LVEDD, OR=0.45, 95%CI (0.25, 0.83), P<0.01] and aortic regurgitation [OR=7.26, 95%CI (1.67, 31.53), P<0.01] were independent risk factors for 24-hour death in patients with ATAAD. Conclusion    In this study, LVEDD and aortic regurgitation are identified as independent risk factors for 24-hour mortality in ATAAD patients. Therefore, patients with aortic regurgitation and small LVEDD should be treated with sugery as soon as possible.

OX40 is a costimulatory receptor that is expressed primarily on activated CD4⁺, CD8⁺, and regulatory T cells. The ligation of OX40 to its sole ligand OX40L potentiates T cell expansion, differentiation, and activation and also promotes dendritic cells to mature to enhance their cytokine production. Therefore, the use of agonistic anti-OX40 antibodies for cancer immunotherapy has gained great interest. However, most of the agonistic anti-OX40 antibodies in the clinic are OX40L-competitive and show limited efficacy. Here, we discovered that BGB-A445, a non-ligand-competitive agonistic anti-OX40 antibody currently under clinical investigation, induced optimal T cell activation without impairing dendritic cell function. In addition, BGB-A445 dose-dependently and significantly depleted regulatory T cells in vitro and in vivo via antibody-dependent cellular cytotoxicity. In the MC38 syngeneic model established in humanized OX40 knock-in mice, BGB-A445 demonstrated robust and dose-dependent antitumor efficacy, whereas the ligand-competitive anti-OX40 antibody showed antitumor efficacy characterized by a hook effect. Furthermore, BGB-A445 demonstrated a strong combination antitumor effect with an anti-PD-1 antibody. Taken together, our findings show that BGB-A445, which does not block OX40-OX40L interaction in contrast to clinical-stage anti-OX40 antibodies, shows superior immune-stimulating effects and antitumor efficacy and thus warrants further clinical investigation.
Mice ; Animals ; Receptors, Tumor Necrosis Factor/physiology* ; Receptors, OX40 ; Membrane Glycoproteins ; Ligands ; Antibodies, Monoclonal/pharmacology* ; Antineoplastic Agents/pharmacology*