ObjectiveTo investigate the role of local pancreatectomy for benign and low-grade malignant pancreatic tumors.MethodThe clinical data of 45 patients with benign and low-grade malignant pancreatic tumors who underwent local pancreatectomy from January 2014 to June 2019 in Union Hospital Affiliated to Tongji Medical College of Huazhong University of Science and Technology were analyzed.ResultsForty-five patients underwent the local enucleation or resection with negative margin. The pathological results showed that there were 17 cases of solid pseudopapilloma, 5 cases of mucinous cystadenoma, 4 cases of serous cystadenoma, 10 cases of islet cell tumor, 5 cases of nonfunctional neuroendocrine tumor, 4 cases of congenital cyst. There were 6 cases of head of pancreas, 26 cases of body of pancreas, 8 cases of tail of pancreas, 5 cases of uncinate process. The tumor was 1.2 to 9.0 cm in diameter with an average of 3.2 cm. Among them, the diameter was more than 5.0 cm in 9 cases. The incidence of pancreatic fistula after operation was 57.8%, 65.4% was grade A fistula, 34.6% was grade B fistula, and no grade C fistula occurred. The incidence of abdominal infection was 13.3%, incidence of abdominal hemorrhage was 6.7%. There was no secondary diabetes mellitus and pancreatic endo- and exocrine dysfunction, and no death case.ConclusionsPancreatic enucleation for benign and low-grade malignant pancreatic tumors after strict preoperative evaluation can effectively preserve the pancreatic endocrine function of patients. Although the incidence of pancreatic fistula is high, it is mostly biochemical fistula, and the incidence of serious complications is low.
ObjectiveTo understand the molecular mechanism of ferroptosis and its research progress and future prospects in pancreatic cancer. MethodThe relevant literature on the molecular mechanism of ferroptosis and its basic and clinical application in the occurrence and development of pancreatic cancer was retrievaled and reviewed. ResultsFerroptosis was a non-apoptotic form of cell death that depended on iron aggregation, and its molecular biological features included iron ion overload, reactive oxygen species accumulation, lipid peroxidation, and so on. Ferroptosis was closely related to cell metabolism, and the imbalance of ferroptosis caused by abnormal metabolism also existed during the tumorigenesis and progression of pancreatic cancer, which in turn triggered the abnormal proliferation of pancreatic cancer cells and leaded to their progression. By regulating the key molecular signaling pathways of ferroptosis, it was expected to find new drug targets and therapeutic pathways for pancreatic cancer treatment. The results of ferroptosis-related studies so far had shown the potential for future translational research in the field of pancreatic cancer treatment. ConclusionsThe mechanism of ferroptosis is of great value in pancreatic cancer research. At present, there are still many uncharted areas in the study of ferroptosis, and the molecular mechanisms involved are still poorly understood. In the future, as the study of ferroptosis continues, it is expected to provide new ideas for pancreatic cancer treatment and discover new targets for drug development.
ObjectiveTo elucidate the latest research progress of Yes-associated protein (YAP) / transcriptional coactivator with PDZ-binding motif (TAZ) in regulating tumor drug resistance. MethodThe relevant literature on YAP/TAZ in regulating tumor cell chemotherapy, immunotherapy, and targeted therapy resistance was reviewed and summarized in the databases such as PubMed, CNKI, and so on. ResultsThe YAP/TAZ was involved in the resistance regulation of chemotherapy, immunotherapy, and targeted therapy in various human tumors. The YAP/TAZ could interact with various proteins to induce the occurrence of tumor resistance. The imbalance of YAP/TAZ signaling might lead to an important mechanism of tumor cell resistance. ConclusionsThere is a close relation between YAP/TAZ and tumor cell resistance. Studying the mechanism of YAP/TAZ regulating tumor resistance can provide new strategies and targets for addressing tumor resistance.
ObjectiveTo evaluate the effect of soft silicone dressing in radiation dermatitis after radiotherapy for head and neck tumors.MethodsThe data of Cochrane Library, Web of Science, JBI Library, CINAHL, Embase, Medline, China National Knowledge Infrastructure, Wanfang Database and Chinese Biomedical Literature Database were searched by computer, and the literature of soft silicone dressing in the treatment of radiation dermatitis were collected. The intervention group was treated with soft silicone dressing and the control group was treated with burn ointment and other methods. The retrieval time was from their inception to March 2019. After screening, quality evaluation and data extraction by two independent evaluators, meta-analysis was carried out by RevMan 5.3 software.ResultsA total of 7 articles were included, including 2 in English and 5 in Chinese, with a total of 487 patients. The results of meta-analysis showed that soft silicone dressing could shorten the wound healing time of radiation dermatitis [mean difference=−4.05 days, 95% confidence interval (CI) (−6.69, −1.42) days, P=0.003], reduce the severity of radiation dermatitis symptoms rated by the Radiation Therapy Oncology Group grade [odds ratio =7.99, 95% CI (2.69, 23.75), P=0.000 2], and reduce the score of Radiation-Induced Skin Reaction Assessment Scale (RISRAS) [standardized mean difference=−1.32, 95%CI (−2.64, −0.00), P=0.05]. To some extent, the curative effect was better than that of other methods. Wound healing time and RISRAS score combined with heterogeneity, after sensitivity analysis, the results were stable. ConclusionSoft silicone dressing can improve the concomitant symptoms of radiation dermatitis after radiotherapy of head and neck tumor, and may relieve the pain of radiation dermatitis to a certain extent, and promote the healing speed of dermatitis wound.
The protocol of rational use of oral H1 receptor antagonists in children: a clinical practice guideline primarily introduces key methods, processes and precautions of the guideline to standardize and guarantee the formulation of this evidence-based guideline. Referring to the World Health Organization Guidelines Development Manual, the guideline will be conducted according to the following steps, which involves the establishment of project group; registration (IPGRP-2020CN110); declaration of interest and funding support; identification of the clinical issues and outcomes; evidence retrieval, assessment, synthesis and utilization; investigation of patients’ preferences and values; development, external review and revision of recommendations; guideline release, dissemination and update.
ObjectiveTo review the research progress of different cell seeding densities and cell ratios in cartilage tissue engineering. MethodsThe literature about tissue engineered cartilage constructed with three-dimensional scaffold was extensively reviewed, and the seeding densities and ratios of most commonly used seed cells were summarized. ResultsArticular chondrocytes (ACHs) and bone marrow mesenchymal stem cells (BMSCs) are the most commonly used seed cells, and they can induce hyaline cartilage formation in vitro and in vivo. Cell seeding density and cell ratio both play important roles in cartilage formation. Tissue engineered cartilage with good quality can be produced when the cell seeding density of ACHs or BMSCs reaches or exceeds that in normal articular cartilage. Under the same culture conditions, the ability of pure BMSCs to build hyaline cartilage is weeker than that of pure ACHs or co-culture of both. ConclusionDue to the effect of scaffold materials, growth factors, and cell passages, optimal cell seeding density and cell ratio need further study.
It is a significant challenge to improve the blood-brain barrier (BBB) permeability of central nervous system (CNS) drugs in their development. Compared with traditional pharmacokinetic property tests, machine learning techniques have been proven to effectively and cost-effectively predict the BBB permeability of CNS drugs. In this study, we introduce a high-performance BBB permeability prediction model named balanced-stacking-learning based BBB permeability predictor(BSL-B3PP). Firstly, we screen out the feature set that has a strong influence on BBB permeability from the perspective of medicinal chemistry background and machine learning respectively, and summarize the BBB positive(BBB+) quantification intervals. Then, a combination of resampling algorithms and stacking learning(SL) algorithm is used for predicting the BBB permeability of CNS drugs. The BSL-B3PP model is constructed based on a large-scale BBB database (B3DB). Experimental validation shows an area under curve (AUC) of 97.8% and a Matthews correlation coefficient (MCC) of 85.5%. This model demonstrates promising BBB permeability prediction capability, particularly for drugs that cannot penetrate the BBB, which helps reduce CNS drug development costs and accelerate the CNS drug development process.
Objective To evaluate the effect of the local del ivery of basic fibroblast growth factor 2 (bFGF-2) on the osseointegration around titanium implant of diabetic rats. Methods The bFGF-2-loaded poly (lactic-co-glycol ic acid) microspheres were prepared by water/oil/water (W/O/W) double-emulsion solvent evaporation method. Thirty-five male SPF level Sprague Dawley rats, weighing 220-250 g and aged 9 weeks, were selected as experimental animals. Ten rats were fedwith the routine diet as normal control group. The other 25 rats were made the diabetic animal model by giving high fat-sugar diet and a low dose streptozotocin (30 mg/ kg) intravenously; 20 rats were made the diabetic animal model successfully. Then 20 rats were randomly divided into diabetic control group (n=10) and bFGF-2 intervention group (n=10). A hole was drilled in the right tibia bone of all rats, and the titanium implant treated by micro-arc oxidation surface was planted into the hole. Simultaneously, the previously prepared microspheres and blood were mixed and were loaded on the surface of the implant before it was implanted into the rats of the bFGF-2 intervention group. At 4 and 8 weeks, the tibia containing implants was harvested, embedded with resin and made undecalcified tissue sl ices to compare the osseointegration. Results At 4 weeks, the implants of the normal control group were surrounded by new lamellar bone with continuity; whereas the tissue around the implants of the diabetic control group contained l ittle woven bone and some fibrous tissue; and obvious new formed bone with continuity was observed in bFGF-2 intervention group. At 8 weeks, the results of 3 groups were similar to those at 4 weeks. At 4 weeks, the percentage of bone-implant contact (BIC) in diabetic control group was significantly less than those in normal control group (P lt; 0.05) and in bFGF-2 intervention group (P lt; 0.05); the BIC in bFGF-2 intervention group was less than in normal control group, but showing no significant difference (P gt; 0.05). After 8 weeks, the BIC in normal control group and in bFGF-2 intervention group were significantly greater than that in diabetic control group (P lt; 0.05), but there was no significant difference between bFGF-2 intervention group and normal control group (P gt; 0.05). Conclusion Local del ivery of bFGF-2 around titanium implants may improve the osseointegration in diabetic rats.
ObjectivesTo evaluate the efficacy and safety of newer-generation antidepressants for patients with myocardial infarction (MI) and depression.MethodsPubMed, The Cochrane Library, EMbase, Web of Science, CBM, CNKI, WanFang Data, and VIP databases were searched from inception to December 2017 to collect randomized controlled trials (RCT) on newer-generation antidepressants for patients with MI and depression. Two reviewers independently screened literature, extracted data, and assessed the risk of bias of included studies. Then, meta-analysis was performed using RevMan 5.3 software.ResultsTen RCTs involving 552 participants were included. The results showed that the antidepressant group was superior to the placebo or treatment group in terms of the improvement of depressive symptoms (SMD=–1.38, 95%CI –1.93 to –0.82, P<0.000 01), and incidence of angina (RR=0.42, 95%CI 0.25 to 0.71,P=0.001), recurrent MI (RR=0.43, 95%CI 0.22 to 0.83, P=0.01), and re-hospitalization for cardiac reasons (RR=0.51, 95%CI 0.28 to 0.92, P=0.03). However, there were no significant differences between two groups on all-cause mortality (RR=0.45, 95%CI 0.18 to 1.11, P=0.08), cardiovascular mortality (RR=0.53, 95%CI 0.16 to 1.73, P=0.29) and incidence of heart failure (RR=0.75, 95%CI 0.39 to 1.43, P=0.38). Subgroup analysis revealed that the type of antidepressants could affect the improvement of depression outcome. Citalopram and fluoxetine might be the most effective drugs for patients with MI and depression.ConclusionsNewer-generation antidepressants are effective for treatment of depressive symptoms in patients with MI and depression, with no significant impact on all-cause mortality and cardiovascular mortality. Moreover, antidepressants can reduce the incidence of angina, recurrent MI, and re-hospitalization for cardiac reasons in patients suffering from MI and depression. Due to limited quantity and quality of included studies, more high quality studies are required to verify above conclusions.
目的 了解2011年四川大学华西第二医院临床分离菌对常见抗菌药物的耐药性。 方法 采用法国生物梅里埃公司VITEK 2 COMPACT全自动细菌鉴定药敏仪，以及ATB 手工药敏条检测临床分离菌对各种常用抗菌药物的耐药性，参照CLSI 2011年版标准判定药敏试验结果，并用WHONET5.4软件统计分析。 结果 临床分离的1 692株细菌中，G+菌占28.0%（473/1 692），G?菌占72.0%（1 219/1 692）。分离的前5位病原菌分别为大肠埃希菌、流感嗜血杆菌、肺炎克雷伯菌、肺炎链球菌、金黄色葡萄球菌。耐甲氧西林金黄色葡萄球菌和耐甲氧西林的凝固酶阴性葡萄球菌分别占金黄色葡萄球菌和凝固酶阴性葡萄球菌的15.1%（22/146）和76.7%（46/60），未检出万古霉素、利奈唑胺耐药株。屎肠球菌对所测抗菌药物的耐药性显著高于粪肠球菌，对氨苄西林的耐药率分别为95.7%和13.3%，高水平氨基糖苷类抗生素耐药屎肠球菌和粪肠球菌的耐药率分别为82.6%和30.0%，检出1株对万古霉素耐药的屎肠球菌，未发现对利奈唑胺耐药菌株。青霉素耐药的肺炎链球菌占4.0%（6/151），肺炎链球菌对红霉素、克林霉素、四环素、复方磺胺的耐药率均高于90%。流感嗜血杆菌、副流感嗜血杆菌以及卡他布兰汉菌产β内酰胺酶的比例分别为58.1%（175/301）、70.0%（21/30）、75.9%（22/29）。肠杆菌细菌中产超广谱β内酰胺酶的大肠埃希菌和肺炎克雷伯菌检出率分别为59.9%和74.1%，耐药率最低的分别是3种碳青酶烯类抗生素和阿米卡星。不发酵糖G?杆菌在分离病原菌中所占比例较低，为12.1%（148/1 692），主要为鲍曼不动杆菌和铜绿假单胞，药敏结果显示，除铜绿假单胞对复方磺胺耐药率为93.5%和鲍曼不动杆菌对氨曲南耐药率为38.9%外，该两种细菌对所测抗生素敏感性高，均在80%以上，未检出泛耐药细菌。 结论 定期进行细菌耐药性监测有助于了解医院细菌耐药性变迁，对指导医院合理应用抗菌药物有重要意义。