OBJECTIVE: To establish a drug delivery system based on hyaluronic acid functionalized mesoporous silica nanoparticles MCM-41 loaded with paclitaxel (HA-MCM-41-PTX). The physical and chemical properties, in vitro drug release and the antitumor effect were investigated. METHODS: The morphological structure and particle size of MCM-41 were observed by TEM. The drug delivery system was characterized by PXRD and FTIR. The in vitro release experiments was carried out to investigate the dissolution rate of HA-MCM-41-PTX. The in vitro cells experiment was carried out to explore the mechanism of HA-MCM-41-PTX on cells. RESULTS: The drug loading capacity of HA-MCM-41-PTX was 28.75%. The in vitro drug release experiments showed that HA-MCM-41-PTX exhibited controlled release with a cumulative release of (86.19±5.11)% until 48 h. In vitro cell experiments showed that HA-MCM-41-PTX had excellent targeting effect due to the modification of hyaluronic acid, which was easier to be uptaken by cells and exhibited great antitumor effect. CONCLUSION: HA-MCM-41-PTX is an excellent drug delivery system with both controlled release and targeting antitumor effect.

Deconstruction of lignocellulosic plant cell walls to fermentable sugars by biochemical means is impeded by several poorly understood ultrastructural and chemical barriers. Pretreatment is an essential step by altering the morphological and compositional characteristics of biomass to enhance the sugar release during enzymatic hydrolysis. Therefore, getting insight into this field is necessary to improve the conversion of biomass into biofuels. In this review, we highlight our recent understanding on the impact of various promising pretreatments on biomass, with emphasis on the topochemical and ultrastructural changes of plant cell walls that are related to the reduction of recalcitrance and the consequence of saccharification. It will lend support to the scientific research and development with respect to biomass conversion.
Biofuels ; Biomass ; Carbohydrates ; chemistry ; Cell Wall ; ultrastructure ; Fermentation ; Hydrolysis ; Lignin ; chemistry ; Plant Cells ; ultrastructure

Adult ; Dust ; analysis ; Female ; Humans ; Male ; Middle Aged ; Neural Networks (Computer) ; Occupational Exposure ; Silicosis ; diagnosis ; Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization ; methods

Carcinoid Tumor ; pathology ; Groin ; Humans ; Laryngeal Neoplasms ; pathology ; Lymphatic Metastasis ; Male ; Middle Aged

Objective:To analyze gene mutations in 3 families with self-improving collodion ichthyosis.Methods:Clinical data were collected from 3 patients with self-improving collodion ichthyosis. DNA was extracted from the peripheral blood of patients and their parents, and high-throughput sequencing was performed in the patients by using a multi-gene panel targeting congenital ichthyosis. After identification of causative gene loci, Sanger sequencing was performed to bidirectionally verify the mutations in the patients and their parents.Results:All the 3 patients presented with a collodion-like membrane at birth, which was shed within 2-4 weeks after birth, and then they gradually showed similar features of mild ichthyosis, including dry skin, tiny scales at local sites, flexural involvement, mild sweating, heat intolerance, cheek flushing, mild palmoplantar keratosis or palmar hyperlinearity. Compound heterozygous mutations were identified in the ALOX12B gene of the 3 patients, including a paternal mutation c.406_408delGAG and a maternal mutation c.77T>C in case 1, a paternal mutation c.1013C>T and a maternal mutation c.1286C>G in case 2, a paternal mutation c.1232T>C and a maternal mutation c.1440C>A in case 3. Function prediction analysis showed that 4 missense mutations c.77T>C, c.1286C>G, c.1013C>T, c.1232T>C and 1 deletion mutation c.406_408delGAG may exert pathogenic effect, and 1 nonsense mutation c.1440C>A led to the generation of a termination codon encoding a truncated protein p.Tyr480Ter, which may affect the protein function and cause disease. None of the 6 mutation sites had been reported in the past.Conclusion:Compound heterozygous pathogenic mutations were identified in the ALOX12B gene of the 3 patients with self-improving collodion ichthyosis, which were inherited from their parents.

Objective: A high-content analysis (HCA) method was established for the in vitro evaluation of traditional Chinese medicine and the potential hepatotoxicity components and mechanism of Polygonum multijiorum were discussed. Methods: HepG2 cells were incubated with different concentration and different incubation time of P. multijiorum extracts and components and then cells were stained with three fluorescent probes, then HCA was applied to detect the cell number, nucleus area, mitochondrial mass, and mitochondrial membrane potential. Results: The ethyl acetate extract and dichloromethane extract had served hepatotoxicity. No significant changes were observed at low concentration (0.01 and 1 μmol/L) of P. multijiorum components; However, the cell number of aloe emodin, emodin, rhein, and gallic acid decreased significantly at the concentration of 0.1 μmol/L. Aloe emodin also caused the nuclear swollen. The TC50 values of emodin and rhein obtained from the dose-response curves were similar to the previous reports. Conclusion: The aloe emodin, emodin, rhein, and gallic acid have potential hepatotoxicity that P. multijiorum induces liver injury. The hepatotoxicity of P. multijiorum may be related to mitochondria-mediated apoptosis according to the influence of P.multijiorum components on mitichondrial mass and mitochondrial membrane potential from the results. The HCA is applicable to evaluate the hepatotoxicity of traditional Chinese medicine.

Objective To study the moderate hypothermia with iced saline given intravenously with ice cap and ice sheet used in patients with severe stroke or craniocerebral trauma in order to clarify its clinical therapeutic effect and recovery of neurologic function for providing reliable clinical data.Methods A total of 84 patients suffered severe stroke (cerebral hemorrhage or cerebral infarction) or traumatic brain injury with GCS (Glascow Coma Scale) ＜8 admitted within 24 hours after onset were enrolled for study.The exclusion criteria were functional decompemsation of heart,liver,kidney and lung as cardiovascular complications of hypertension,hematological and other diseases,and craniocerebral trauma with multiple injuries of thorax,abdomen and extremities.Patients were divided into observation group and control group (n =42 in each group).The patients of two groups were managed to maintain respiratory tract patent,prevention of infection,dehydration,reduction of intracranial pressure and treated with Cytidine Diphosphate Choline,piracetam,ganglioside sodium and other conventional therapy.In control group,patients treated with ice cap and ice sheet,whereas in observation group,patients were treated with iced saline injected intravenously in addition to ice cap and sheet.At admission,the GCS score of patients was assessed and 6 months later,GCS score and Glascow Outcome Scale,(GOS) score of patients were determined,and 12 months after the treatment,quality of life score were evaluated by KPS.Results The time from onset of stroke or from trauma accident occurred to initiation of hypothermia treatment and time from initiation of hypothermia therapy to the target temperature reached in observation group were (8 ±4) hours and (3± 1 )hours respectively,and in control group,they were ( 16± 5) hours and (6 ± 2) hours,and there were significant differences between two groups ( P ＜ 0.05 ).The mean GCS score of patients at 6 months in the observation group and in the control group were (7.01 ± 1.12) and (4.02 ± 1.11 ) respectively (P ＜0.05 ) ; whereas the GOS score at 6 mouths of patients was categorized into good outcome,disabled outcome and poor outcome,and the good outcome in the observation group was significantly better than that in the control group (P ＜ 0.05 ),and no statistically significant difference in disabled outcome was found between two groups (P ＞ 0.05),and the poor outcome of GOS score was significantly lower in observation group than that in control group ( P ＜0.05 ).Twelve months after the treatment,the long-term quality of patients'life assessed by KPS score in observation group was significantly better than that in control group ( P ＜ 0.05).Conclusions The moderate hypothermia therapy by using iced saline administered intravenously combined with ice cap and ice sheet for severe stroke and head trauma patients conferred better therapeutic effects than the treatment with ice cap and ice sheet.

Objective To evaluate the ability of 3-AB to sensitize the human esophageal carcinoma cell strain (CaEs-17) to radiation in v/tro and its mechanisms. Methods CaEs-17 cells were treated with 3-AB at 0, 2.5, 7.5 mmol/L and given irradiation O, 3, 6, 9, 12 Gy. 3-AB concentration in each group was made dose-survival curve using multi-target single-hit maiths model by clonogenie assay. MTT assay was performed to observe the survival of irradiated cells.comet assay and metaphase chromosome analysis were used to measure the DNA damage degree and chromosome aberration of CaEs-17 cell after 3-AB treatment and irradiation. Results Cell survival experiments showed SER of 1.21, 1.52 for 2.5 mmol/L, 7.5 mmol/L 3-AB respectively using multi-target single-hit maths model. The survival fraction of irradiated CaEs-17 cell was decreased after 3-AB treatment. DNA damage and the chromatid breakage number of irradiated CaEs-17 cells were increased after 3-AB treatment. Conclusions 3-AB, a PARP inhibitor, can enhance the radiosensitivity of human esophageal carcinoma cell strain (CaEs-17). DNA damage repair inhibition by 3-AB might be one of the mechanisms.

By means of searching the ancient and modern literature,this study mainly investigated the etiology and pathogenesis of IBD,summarized the rules of acupoint selection and the experimental mechanism of the moxibustion treatment for IBD,providing the basis and theoretical evidence of acupoint selection and moxibustion therapy for clinical practice and studies.Ancient literatures were retrieved in TCM database system,while modern literatures in Pubmed,CNKI and VIP database from January,2005 to January,2016.Finally,comprehensive analysis was implemented among the selected literatures.It was found that the pathogenesis of IBD was associated with exogenous evils,diet,emotion,and fatigue during chronic diseases in TCM.The treatments of acupuncture and moxibustion for IBD should consider both the primary symptoms and root causes by regulating functional activity of Zang and Fu and also warming and nourishing the spleen and stomach.On this basis,acupoint selection mainly focused on the stomach meridian with the functions of invigorating spleen and stomach,elevating clear qi and descending turbid,recovering the bowel function and strenthening the body and antidiarrhea.Modern research upon the scientific basis of TCM indicated that moxibustion stimulated the thermoreceptors around the acupoints leading to the increased degranulation of mast cells.Immune factors were impacted with the regulation of transcriptional activators in the bowel for repairing mucosal barrier and preventing intestinal fibrosis in IBD.In conclusion,moxibustion was effective on warming and nourishing spleen and stomach and regulating the function activity of bowel for the prevention and treatment of IBD.Achievements were made in the mechanism researches on IBD based on the TCM theory.However,some profound mechanisms need in-depth exploring.

Patent documentation is a kind of high-value scientific literature. In this paper, the World Traditional Medicine Patent Database (WTMPD) was used to retrieve patents of the traditional medicines used in the treatment and prevention of alcoholic worldwide in the past 30 years. A total of 3 238 patents were further screened by a se-ries of processes. Finally, multi-angle analysis was carried on the dataset to form a patent analysis report on tradi-tional medicines used in alcoholism, including the distribution of the patents, the application trend, the domestic and foreign geographical layout, the major applicant and so on. From the analysis, we found that China had a rapid in-crease in the number of patent applications, which was in the leading role in the world, though the technology and the number of PCT applicant from China is relatively low. Puerariae Lobate radix and flos are frequently used in al-coholism patents.