In the past ten years, many new structurally unique antitumor compounds have been isolated from marine microorganisms. This article summarizes the research advances in antitumor metabolites from marine microorganisms in recent ten years, according to microorganisms species.

Objective To investigate gallic acid-derived chemical constituents of Choerospondias axillaries (Roxb.) Burtt. et Hill., and evaluate their in vitro anti-tumor, anti-hypoxia and anti-bacteria activities. Methods The aimed chemical constituents were isolated by various chromatographic means, and their structures were identified by physicochemical and spectroscopic data. MTT method was employed to evaluate anti-tumor and anti-hypoxia activities. Antibacterial activities were tested by paper disc method. Results Seven compounds 1-7 were isolated from the stem barks of Choerospondias axillaries (Roxb.) Burtt. et Hill. and identified as gallic acid(1), gallic acid ethyl ether(2), 1-O-galloyl-β-D-glucose(3), 1,6-di-O-galloyl-β-D-glucose(4), 1,4-di-O-galloyl-β-D-glucose(5), 1,4,6-tri-O-galloyl-β-D-glucose(6), and 1,3,4,6-tetra-O-galloyl-β-D-glucose(7). Compounds 1, 2 and 4-6 significantly inhibited K562 cells with the IC50 values of 2.9, 14.6, 39.1, 40.2, 41.2 μg/ml, respectively, and 3 and 7 also showed a slight inhibition of the K562 cells with the inhibition rate of 20.8% and 30.1% at 100 μg/ml respectively. Compounds 1-7 showed protective effects on anoxia-induced injury in cultured ECV304 and PC12 cells at the concentrations showing no significant cytotoxicity, and 5-7 also showed an antibacterial effect on Staphylococcus aureus ATCC6538 to a certain extent. Conclusion Compounds 2-7 were isolated from the genus Choerospondias for the first time. It was the first time to report 1-7 as anti-tumor and anti-hypoxia constituents of Choerospondias axillaries, and the anti-hypoxia activity for 1-7 was also recorded for the first time in the present study.

Objective To investigate the clinical efficacy of transjugular intrahepatic portosystemic shunt(TIPS)combined with indwelling catheter-directed thrombolysis for the treatment of portal vein thrombosis(PVT).Methods The clinical efficacy of 307 patients with portal hypertension complicated by PVT,who received successful TIPS combined with indwelling catheter-directed thrombolysis at the Affiliated Beijing Shijitan Hospital of Capital Medical University of China between January 2016 and December 2019,were retrospectively analyzed.Before and after TIPS,the inferior vena cava pressure(IVCP)and portal vein pressure(PVP)were measured,and the pre-TIPS,post-TIPS(before thrombolysis),and post-thrombolysis portal pressure gradient(PPG,PPG=PVP-IVCP)was separately calculated.Reexamination of portal venography DSA was performed to determine the degree of PVT disappearance and whether the shunt was unobstructed.All patients were followed up for one year.Results The pre-TIPS,post-TIPS(before thrombolysis),and post-thrombolysis mean PPG was(24.50±6.91)mmHg,(18.51±5.11)mmHg,and(10.17±3.97)mmHg,respectively.The post-thrombolysis mean PPG was strikingly lower than the pre-thrombolysis values,the differences were statistically significant(P＜0.001).Among the 307 patients,complete disappearance of PVT was observed in 221(72.3%),remarkable reduction of PVT in 86(27.7%),and no invalid result was seen.The patients having complete patency of the shunt flow accounted for 85.7%of the 307 patients(261/307),and the patients having partial patency of the shunt flow accounted for 14.3%of the 307 patients(46/307).Forty-two patients developed complications,and no death occurred.All patients were followed up for one year,and the main clinical symptoms were improved or completely disappeared.Among the 307 patients,an increase in thrombus volume was found in 17(5.5%)when compared to their postoperative values,which returned to the first-time postoperative level after local treatment of the thrombus via the TIPS shunt combined with catheter-directed thrombolysis.Within one year after TIPS and thrombolysis,overt hepatic encephalopathy(OHE)occurred in 54 patients(17.6%,54/307).One patient died of hepatic failure 9 months after TIPS,another patient died of cerebral hemorrhage 11 months after TIPS,and all the remaining patients were alive.Conclusion For patients with portal hypertension complicated by PVT,TIPS combined with indwelling catheter-directed thrombolysis is clinically safe and effective.The standardized,systematic management of the whole therapeutic process should be strengthened.(J Intervent Radiol,2024,32:22-27)

Objective: To survey the conduction and evaluate the effectiveness of extracorporeal membrane oxygenation (ECMO) therapy in pediatric intensive care unit (PICU) in China mainland. Methods: In a questionnaire-based survey, we retrospectively reviewed the application of ECMO in children's hospital and general hospital in China mainland to summarize and analyze the categories of diseases and prognosis of children treated with ECMO therapy. Results: By December 31, 2017, a total of 23 hospitals using ECMO, including 22 tertiary referral hospitals and 1 secondary hospital, among which 16 were children′s hospitals and 7 were general hospitals. Thirty-seven ECMO equipment was available. A total of 518 patients treated with ECMO, within whom 323 (62.4%) successfully weaned from ECMO and 262 (50.6%) survived to discharge. Among 375 pediatric patients, 233 (62.1%) were successfully weaned from ECMO and 186 (49.6%) survived to discharge. Among 143 newborn patients, 90 (62.9%) successfully weaned from ECMO, 76 (53.1%) survived to discharge. ECMO was applied in veno-arterial (VA) mode to 501 (96.7%) patients, veno-venous (VV) mode to 14 (2.7%) patients, and VV-VA conversion mode to 3 (0.6%) patients. Sixty-nine patients required extracorporeal cardiopulmonary resuscitation (ECPR), including 20 newborn patients (29.0%) and 38 pediatric patients (71.0%), who were all with cardiovascular disease. Neonatal respiratory distress syndrome (26/61), persistent pulmonary hypertension of the newborn (PPHN) (12/61), and meconium aspiration syndrome (MAS) (11/61) are the most common pulmonary diseases in newborn patients; among whom, infants with PPHN had highest survival rate (10/12), followed by MAS (9/11). Among newborn patients with cardiovascular diseases, those who admitted were after surgery for congenital cardiac disease were the most common (54/82), while those with septic shock had the highest survival rate (2/3). In pediatric pulmonary diseases, acute respiratory distress syndrome was the most common (42/93), while plastic bronchitis was with the highest survival rate (4/4), followed by viral pneumonia (13/16). Among pediatric cardiovascular diseases, congenital cardiac defect was the most common (124/282), while fulminant myocarditis had the highest survival rate (54/77). Conclusion The application of ECMO as a rescue therapy for children with severe cardiopulmonary failure has dramatically developed in China mainland.