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1.
BMC Urol ; 24(1): 40, 2024 Feb 16.
Artigo em Inglês | MEDLINE | ID: mdl-38365673

RESUMO

BACKGROUND: To investigate the value of semi-quantitative and quantitative parameters (PI-RADS score, T2WI score, ADC, Ktrans, and Kep) based on multiparametric MRI (mpMRI) or biparametric MRI (bpMRI) combined with prostate specific antigen density (PSAD) in detecting clinically significant prostate cancer (csPCa). METHODS: A total of 561 patients (276 with csPCa; 285 with non-csPCa) with biopsy-confirmed prostate diseases who underwent preoperative mpMRI were included. Prostate volume was measured for calculation of PSAD. Prostate index lesions were scored on a five-point scale on T2WI images (T2WI score) and mpMRI images (PI-RADS score) according to the PI-RADS v2.1 scoring standard. DWI and DCE-MRI images were processed to measure the quantitative parameters of the index lesion, including ADC, Kep, and Ktrans values. The predictors of csPCa were screened by logistics regression analysis. Predictive models of bpMRI and mpMRI were established. ROC curves were used to evaluate the efficacy of parameters and the model in diagnosing csPCa. RESULTS: The independent diagnostic accuracy of PSA density, PI-RADS score, T2WI score, ADCrec, Ktrans, and Kep for csPCa were 80.2%, 89.5%, 88.3%, 84.6%, 58.5% and 61.6%, respectively. The diagnostic accuracy of bpMRI T2WI score and ADC value combined with PSAD was higher than that of PI-RADS score. The combination of mpMRI PI­RADS score, ADC value with PSAD had the highest diagnostic accuracy. CONCLUSIONS: PI-RADS score according to the PI-RADS v2.1 scoring standard was the most accurate independent diagnostic index. The predictive value of bpMRI model for csPCa was slightly lower than that of mpMRI model, but higher than that of PI-RADS score.


Assuntos
Imageamento por Ressonância Magnética Multiparamétrica , Neoplasias da Próstata , Masculino , Humanos , Neoplasias da Próstata/patologia , Imageamento por Ressonância Magnética/métodos , Estudos Retrospectivos , Imageamento por Ressonância Magnética Multiparamétrica/métodos , Antígeno Prostático Específico , Análise Multivariada
2.
BMC Immunol ; 24(1): 47, 2023 11 25.
Artigo em Inglês | MEDLINE | ID: mdl-38007423

RESUMO

BACKGROUND AND AIM: Liver failure, which is predominantly caused by hepatitis B (HBV) can be improved by an artificial liver support system (ALSS). This study investigated the phenotypic heterogeneity of immunocytes in patients with HBV-related acute-on-chronic liver failure (HBV-ACLF) before and after ALSS therapy. METHODS: A total of 22 patients with HBV-ACLF who received ALSS therapy were included in the study. Patients with Grade I according to the ACLF Research Consortium score were considered to have improved. Demographic and laboratory data were collected and analyzed during hospitalization. Immunological features of peripheral blood in the patients before and after ALSS were detected by mass cytometry analyses. RESULTS: In total, 12 patients improved and 10 patients did not. According to the immunological features data after ALSS, the proportion of circulating monocytes was significantly higher in non-improved patients, but there were fewer γδT cells compared with those in improved patients. Characterization of 37 cell clusters revealed that the frequency of effector CD8+ T (P = 0.003), CD4+ TCM (P = 0.033), CD4+ TEM (P = 0.039), and inhibitory natural killer (NK) cells (P = 0.029) decreased in HBV-ACLF patients after ALSS therapy. Sub group analyses after treatment showed that the improved patients had higher proportions of CD4+ TCM (P = 0.010), CD4+ TEM (P = 0.021), and γδT cells (P = 0.003) and a lower proportion of monocytes (P = 0.012) compared with the non-improved patients. CONCLUSIONS: Changes in effector CD8+ T cells, effector and memory CD4+ T cells, and inhibitory NK cells are associated with ALSS treatment of HBV-ACLF. Moreover, monocytes and γδT cells exhibited the main differences when patients obtained different prognoses. The phenotypic heterogeneity of lymphocytes and monocytes may contribute to the prognosis of ALSS and future immunotherapy strategies.


Assuntos
Insuficiência Hepática Crônica Agudizada , Hepatite B Crônica , Hepatite B , Fígado Artificial , Humanos , Insuficiência Hepática Crônica Agudizada/terapia , Insuficiência Hepática Crônica Agudizada/complicações , Vírus da Hepatite B , Linfócitos T CD8-Positivos , Fígado Artificial/efeitos adversos , Prognóstico , Hepatite B Crônica/terapia
3.
J Clin Lab Anal ; 37(5): e24860, 2023 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-36916737

RESUMO

BACKGROUND: Immunoregulation plays pivotal roles during chronic hepatitis B virus (HBV) infection. Studies have shown that Interleukin (IL)-35 is an important molecule associated with inadequate immune response against HBV. However, the mechanisms involved in the up-regulation of IL-35 expression during persistent HBV infection remain unknown. METHODS: In this study, we constructed a plasmid expressing the HBV X protein (pCMV-HBx) to evaluate the relationship between HBx and IL-35. Activation of the JNK/c-Jun pathway was analyzed and chromatin immunoprecipitation followed by sequencing and luciferase reporter assays were performed to determine whether c-Jun could regulate IL-35 transcription. RESULTS: HBx can significantly activate IL-35 promoter in both LO2 and HepG2 cells compared to the control plasmid (pCMV-Tag2) using the dual-luciferase assay. Whereas other viral proteins, such as S, preS1, the core protein, had no significant effect on IL-35 expression. Similarly, WB and qRT-PCR also showed that HBx can significantly promote IL-35 expression at protein and mRNA levels in the aforementioned cells. The relevant pathway mechanism showed that the expression of JNK and c-Jun genes was significantly higher in transfected cells carrying pCMV-HBx than in the pCMV-Tag2-transfected and -untransfected cells. WB analysis revealed that phosphorylated JNK and c-Jun were overexpressed after HBx action. Conversely, the addition of the JNK/c-Jun signaling pathway inhibitor could significantly suppress HBx-induced IL-35 expression in a dose-dependent manner. CONCLUSIONS: A novel molecular mechanism of HBV-induced IL-35 expression was revealed, which involves JNK/c-Jun signaling in up-regulating IL-35 expression via HBx, resulting in transactivation of the IL-35 subunit EBI3 and p35 promoter.


Assuntos
Hepatite B Crônica , Hepatite B , Interleucinas , Neoplasias Hepáticas , Humanos , Carcinoma Hepatocelular/genética , Hepatite B/genética , Vírus da Hepatite B/fisiologia , Interleucinas/genética , Neoplasias Hepáticas/genética , Luciferases
4.
Hepatobiliary Pancreat Dis Int ; 22(1): 64-71, 2023 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-36151023

RESUMO

BACKGROUND: Acute-on-chronic liver failure (ACLF) is a life-threatening syndrome defined as acute decompensation in patients with chronic liver disease. Liver transplantation (LT) is the most effective treatment. We aimed to assess the impact of cirrhosis-related complications pre-LT on the posttransplant prognosis of patients with ACLF. METHODS: This was an observational cohort study conducted between January 2018 and December 2020. Clinical characteristics, cirrhosis-related complications at LT and patient survival post-LT were collected. All liver recipients with ACLF were followed for 1 year post-LT. RESULTS: A total of 212 LT recipients with ACLF were enrolled, including 75 (35.4%) patients with ACLF-1, 64 (30.2%) with ACLF-2, and 73 (34.4%) with ACLF-3. The median waiting time for LT was 11 (4-24) days. The most prevalent cirrhosis-related complication was ascites (78.8%), followed by hepatic encephalopathy (57.1%), bacterial infections (48.1%), hepatorenal syndrome (22.2%) and gastrointestinal bleeding (11.3%). Survival analyses showed that patients with complications at LT had a significantly lower survival probability at both 3 months and 1 year after LT than those without complications (all P < 0.05). A simplified model was developed by assigning one point to each complication: transplantation for ACLF with cirrhosis-related complication (TACC) model. Risk stratification of TACC model identified 3 strata (≥ 4, = 3, and ≤ 2) with high, median and low risk of death after LT (P < 0.001). Moreover, the TACC model showed a comparable ability for predicting the outcome post-LT to the other four prognostic models (chronic liver failure-consortium ACLF score, Chinese Group on the Study of Severe Hepatitis B-ACLF score, model for end-stage liver disease score and Child-Turcotte-Pugh score). CONCLUSIONS: The presence of cirrhosis-related complications pre-LT increases the risk of death post-LT in patients with ACLF. The TACC model based on the number of cirrhosis-related complications pre-LT could stratify posttransplant survival, which might help to determine transplant timing for ACLF.


Assuntos
Insuficiência Hepática Crônica Agudizada , Doença Hepática Terminal , Transplante de Fígado , Humanos , Insuficiência Hepática Crônica Agudizada/diagnóstico , Insuficiência Hepática Crônica Agudizada/cirurgia , Doença Hepática Terminal/complicações , Índice de Gravidade de Doença , Cirrose Hepática/complicações , Cirrose Hepática/diagnóstico , Cirrose Hepática/cirurgia , Transplante de Fígado/efeitos adversos , Prognóstico
5.
Int J Mol Sci ; 23(15)2022 Aug 03.
Artigo em Inglês | MEDLINE | ID: mdl-35955757

RESUMO

Hemicellulose is a major component of the complex biomass recalcitrance structure of fiber cell walls. Even though biomass recalcitrance protects plants, it affects the effective utilization of lignocellulosic biomass resources. Therefore, the separation and extraction of hemicellulose is very important. In this study, an improved two-step alkali pretreatment method was proposed to separate hemicellulose efficiently. Firstly, 16.61% hemicellulose was extracted from bamboo by the weak alkali treatment. Then, the physical freezing and the alkali treatment were carried out by freezing at -20 °C for 12.0 h and thawing at room temperature, heating to 80 °C, and treating with 5.0% sodium hydroxide for 90 min; the extraction yield of hemicellulose reached 73.93%. The total extraction yield of the two steps was 90.54%, and the molecular weight and purity reached 44,865 g·mol-1 and 89.60%, respectively. It provides a new method for breaking the biomass recalcitrance of wood fiber resources and effectively extracting hemicellulose.


Assuntos
Álcalis , Polissacarídeos , Biomassa , Carboidratos , Fibras na Dieta , Congelamento , Hidrólise , Polissacarídeos/química
6.
J Sci Food Agric ; 102(13): 5690-5699, 2022 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-35411552

RESUMO

BACKGROUND: Egg yolk is recognized for its excellent nutritional benefit and economic value; however, egg is a perishable food, potentially losing quality if not handled properly between the time from farm production to consumption. Knowledge of the changes of yolk lipid composition under an extreme storage condition close to vitelline membrane breaking, which results in an inedible condition for shelf-eggs, remains incomplete. Considering the complexity of yolk lipids, the architectural features of yolk lipids at high-temperature storage (30°C for 10 days versus fresh) were classified through lipidomics. RESULTS: This strategy yielded 1508 features within the lipid database coupled with 74 significantly different lipids (P < 0.05, fold change > 1.2 or < 0.83), mainly triglycerides, phospholipids, and sphingolipids. Most of them were decreased after storage; for example, triglycerides were assumed to play a role as a 'buffer' to maintain the system stability during storage by balancing fatty acid saturation, which strongly reduces the egg edible value for humans. Furthermore, phospholipids, especially the highly unsaturated phosphatidylcholine, decreased significantly and were suggested to be the primary cause for the variation in yolk emulsifying properties and flavor. CONCLUSION: Altogether, these results deriving from oxidation and lipolysis reactions enhance our understanding of lipid transformation and the biochemical mechanisms, at the molecular level, of the deteriorative process of the egg yolk. These findings may lay the foundation for identifying processes, including some modifications of the lipid composition of rations fed to laying hens, aiming to improve the long-term shelf-stability of shell eggs and egg products. © 2022 Society of Chemical Industry.


Assuntos
Galinhas , Lipidômica , Ração Animal/análise , Animais , Cromatografia Líquida de Alta Pressão , Gema de Ovo/química , Ovos/análise , Ácidos Graxos/análise , Feminino , Humanos , Fosfolipídeos/análise , Triglicerídeos/análise
7.
J Sci Food Agric ; 102(3): 1165-1173, 2022 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-34329491

RESUMO

BACKGROUND: Although the importance of phosphorylation in the function of proteins is known, investigation of the protein phosphorylation of duck egg yolk (DEY) is still very limited. This study aimed to conduct a detailed phosphoproteomic study of DEY using immobilized metal affinity chromatography and ultra-high liquid chromatography tandem mass spectrometry. RESULTS: A total of 253 phosphorylation sites assigned to 66 phosphoproteins were identified in DEY, of which VTG-1, VTG-2, and fibrinogen alpha chain were found to be the highly phosphorylated proteins in DEY. The biological functions of the identified phosphoproteins were illuminated through gene ontology analysis, which showed that they were mainly involved in binding, catalytic, immune response, and metabolic activity. S-X-E and S-X-S were found to be the most conserved serine motifs of phosphorylation in DEY. The comparison of DEY phosphoproteins with those of chicken egg yolk (CEY) revealed that differences mostly involved molecular functions and biological processes. The comparison also revealed a higher phosphorylation level in DEY proteins. CONCLUSION: The higher phosphorylation level in DEY proteins than that in CEY proteins are supposed to help enhance duck growth performance and biological activities (e.g. antibacterial and antioxidant ability) for better adapting the humid environment the duck lived. © 2021 Society of Chemical Industry.


Assuntos
Patos/metabolismo , Proteínas do Ovo/química , Gema de Ovo/química , Fosfoproteínas/química , Animais , Cromatografia Líquida de Alta Pressão , Patos/genética , Proteínas do Ovo/genética , Proteínas do Ovo/metabolismo , Gema de Ovo/metabolismo , Ontologia Genética , Fosfoproteínas/genética , Fosfoproteínas/metabolismo , Fosforilação , Proteômica , Espectrometria de Massas em Tandem
8.
Phys Chem Chem Phys ; 19(27): 17745-17755, 2017 Jul 21.
Artigo em Inglês | MEDLINE | ID: mdl-28657105

RESUMO

It is widely accepted that the role of the high molecular weight (HMW) component is cooperative in shear-induced crystallization, owing to entanglements among long chains. However, this paper demonstrates that the HMW component has a novel effect on structural evolution during the process of multi-melt multi-injection molding (M3IM), organized as follows. First, the appropriate HDPE system with an incremental concentration of HMW tails was established. Second, the crystalline morphologies and orientation behaviors of the M3IM samples were characterized using a combination of scanning electron microscopy (SEM) and two-dimensional small angle X-ray scattering (2D-SAXS), and these suggested that the amount of shish-kebabs was not monotonically promoted with an increasing content of HMW tails but tended to reduce at a certain value. Third, in order to explain this phenomenon, the special temperature and shear profiles of M3IM were depicted subsequently, and finally the mechanism of hierarchical structure formation with the influence of various amounts of HMW tail chains was discussed, based on the classical rheological viewpoint.

10.
Hepatobiliary Pancreat Dis Int ; 15(2): 173-9, 2016 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-27020634

RESUMO

BACKGROUND: Differentiation of liver progenitor cells (LPCs) to functional hepatocytes holds great potential to develop new strategies for hepatocyte transplantation and the screening of drug-induced cytotoxicity. However, reports on the efficient and convenient hepatic differentiation of LPCs to hepatocytes are few. The present study aims to investigate the possibility of generating functional hepatocytes from LPCs in an indirect co-culture system. METHODS: Mouse LPCs were co-cultured in Transwell plates with an immortalized human hepatic stellate cell line (HSC-Li) we previously established. The morphology, expression of hepatic markers, and functions of mouse LPC-derived cells were monitored and compared with those of conventionally cultured LPCs. RESULTS: Co-culturing with HSC-Li cells induced differentiation of mouse LPCs into functional hepatocyte-like cells. The differentiated cells were morphologically transformed into hepatocyte-like cells 3 days after co-culture initiation. In addition, the differentiated cells expressed liver-specific genes and possessed hepatic functions, including glycogen storage, low-density lipoprotein uptake, albumin secretion, urea synthesis, and cytochrome P450 1A2 enzymatic activity. CONCLUSIONS: Our method, which employs indirect co-culture with HSC-Li cells, can efficiently induce the differentiation of LPCs into functional hepatocytes. This finding suggests that this co-culture system can be a useful method for the efficient generation of functional hepatocytes from LPCs.


Assuntos
Diferenciação Celular , Células Estreladas do Fígado/metabolismo , Hepatócitos/metabolismo , Fígado/metabolismo , Comunicação Parácrina , Células-Tronco/metabolismo , Albuminas/metabolismo , Animais , Biomarcadores/metabolismo , Linhagem Celular , Forma Celular , Técnicas de Cocultura , Meios de Cultivo Condicionados/metabolismo , Citocromo P-450 CYP1A2/metabolismo , Regulação da Expressão Gênica , Glicogênio/metabolismo , Humanos , Lipoproteínas LDL/metabolismo , Fígado/citologia , Masculino , Camundongos Endogâmicos C57BL , Fenótipo , Fatores de Tempo , Ureia/metabolismo
11.
Zhongguo Zhong Yao Za Zhi ; 38(21): 3627-31, 2013 Nov.
Artigo em Zh | MEDLINE | ID: mdl-24494544

RESUMO

The quality control over traditional Chinese medicine (TCM) preparations has long been an important issue on the international development road of TCMs. Because of the complexity of TCM ingredients, preparation production and its quality control become a big difficulty. How to produce TCM preparations with preparation quality stability and controllability is the key problem in urgent need of solution in current TCM preparation field. The author thought that according to the characteristics of TCM preparation process, the multidimensional dynamic quality control model in the production process might become one of methods for solving quality controllability of TCM preparations. Therefore, we proposed the study through of the multi-dimensional structure quality control based on TCM material basis component structure. The study aims to control over the stability of TCM preparation quality during the whole process of dynamic changes (the component analysis monitoring on intermediates during the process of production, herbal source, intermediate production to preparation products). Xiaoaiping injection was taken as the example to expound the multidimensional quality control process of Xiaoaiping injection, in the hope of providing new ideas for the quality control over modern TCM preparations.


Assuntos
Antineoplásicos Fitogênicos/química , Antineoplásicos Fitogênicos/normas , Química Farmacêutica/normas , Medicamentos de Ervas Chinesas/química , Medicamentos de Ervas Chinesas/normas , Animais , Antineoplásicos Fitogênicos/farmacologia , Medicamentos de Ervas Chinesas/farmacologia , Humanos , Controle de Qualidade
12.
Zhongguo Zhong Yao Za Zhi ; 38(20): 3479-83, 2013 Oct.
Artigo em Zh | MEDLINE | ID: mdl-24490557

RESUMO

To determine the optimum process for preparing Cinnamomi Cortex oil microspheres based on porous silicon dioxide. After porous silica dioxide adsorbed Cinnamomi Cortex oil, Cinnamomi Cortex oil microspheres were prepared by the dropping method, with sodium alginate as the skeleton materials. The preparation process was optimized through the L(9) (3(4)) orthogonal test design, with microspheres diameter, distribution, drug loading capacity and entrapment efficiency as the indexes. The cinnamon volatile oil microspheres were characterized by scanning election microscope (SEM), thermogravimetric analysis (TGA), and infrared (IR) spectroscopy. An in vitro drug release experiment was conducted. The results showed that the microspheres prepared with the optimal process parameters were in good shape, even in size and good in dispersibility, with an average diameter of 1.61 mm, an average drug loading capacity of 32.85%, an entrapment efficiency of 94.79%. The maximum drug release capacity reached 72.6%, 95.0%, 97.4%, respectively, under pH 4.0, 6.8, 7.4 in 6 hours. Meanwhile, microsphere generation was tested by IR, TGA and other methods. The established optimum process for preparing Cinnamomi Cortex oil microspheres was proved to be stable and practical.


Assuntos
Cinnamomum/química , Portadores de Fármacos/química , Medicamentos de Ervas Chinesas/química , Dióxido de Silício/química , Alginatos/química , Química Farmacêutica , Cinnamomum zeylanicum , Ácido Glucurônico/química , Ácidos Hexurônicos/química , Microesferas , Tamanho da Partícula , Porosidade , Solubilidade
13.
Artigo em Inglês | MEDLINE | ID: mdl-35538811

RESUMO

BACKGROUND: Diabetic patients have weakened periodontal ligaments and an increased risk of periodontitis due to uncontrolled glycemia. Betulinic acid (BA), a hypoglycemic drug, has anti-inflammatory activities. OBJECTIVES: The current study aimed to explore the protective effect of BA on the inflammation in human periodontal ligament cells (PDLCs) stimulated with lipopolysaccharide (LPS) and/or high glucose (HG) status and its mechanisms of action. METHODS: Human PDLCs were exposed to LPS and/or HG, with or without BA intervention. The production of nitrite oxide (NO) and prostaglandin E2 (PGE2) were quantified by Griess reaction and enzyme-linked immunosorbent assay, respectively. Immunoblotting analyses were employed to detect the expression of inducible nitric oxide synthase (iNOS) and the cyclooxygenase-2 (COX- 2), as well as the activation of mitogen-activated protein kinases (MAPKs) and nuclear factor kappa- B (NF-κB) in human PDLCs. RESULTS: The increased production of iNOS/NO and COX-2/PGE2 and increased phosphorylated levels of IκBα, JNK, and p38 can be detected in human PDLCs with LPS and/or HG situations, while increased phosphorylated ERK can be seen in cells under only LPS condition. Furthermore, the non-toxic concentration of BA (10 µM) prevented NF-κB and MAPKs activation and partly but significantly reversed the induction of COX-2/ PGE2 and iNOS/NO in human PDLCs with LPS and/or HG loaded. CONCLUSION: BA was proved for the first time to protect human PDLCs from the LPS-induced and/or HG-induced inflammation, which works through the mechanism involving the action of MAPKs and NF-κB. signaling pathways. Thus, BA could be used to alleviate diabetic complications of periodontitis.


Assuntos
Ácido Betulínico , Lipopolissacarídeos , Humanos , Lipopolissacarídeos/toxicidade , Ligamento Periodontal , Ciclo-Oxigenase 2 , Dinoprostona , NF-kappa B , Anti-Inflamatórios/farmacologia , Inflamação , Nitritos , Glucose/toxicidade
14.
J Pharm Biomed Anal ; 236: 115691, 2023 Nov 30.
Artigo em Inglês | MEDLINE | ID: mdl-37703644

RESUMO

Letermovir is a cytomegalovirus inhibitor for cytomegalovirus infection a hematopoietic-cell transplantation. In the degradation test of Letermovir, five new impurities were detected at levels of ND âˆ¼ 2.21 % (by oxide, thermal or photolytic). These impurities were synthesized directly, characterized and identified by HRMS NMR spectra and X-ray crystallography. Then co-injected with commercial products to confirm their retention times in HPLC. The possible formation pathways and synthetic methods of these impurities were discussed in details. Furthermore, the toxicological properties of impurities were evaluated by ACD/Percepta 14.52.0 (Build 3525) software.

15.
Curr Med Imaging ; 2023 Jun 27.
Artigo em Inglês | MEDLINE | ID: mdl-37366359

RESUMO

INTRODUCTION: To analyze the value of magnetic resonance imaging (MRI) in suspicious cases for prenatal detection of placenta accreta (PA). MATERIALS AND METHODS: A total of 50 placental MRI exams performed on a 1.5T scanner were retrospectively reviewed by two radiologists in consensus.HASTE(half-Fourier acquisition single-shot turbo spin echo)and True-FISP (true fast imaging with steady-state precession) sequences were acquired. Findings from MRI were compared with the final diagnosis, which was determined by clinical findings at delivery and pathological examination of specimens. RESULTS: Of 50 pregnant women in the analysis, 33 required cesarean hysterectomy, and 17 underwent cesarean delivery.MRI signs such as myometrial thinning, loss of T2 hypointense interface(loss of retroplacental clear space on US), heterogenous intraplacental sign, and intraplacental T2 dark bands were more likely to be seen in this group. In this group, the cases that were finally clinically and pathologically confirmed were 12, 16, and 22 cases of placenta accreta vera, placenta increta, and placenta percreta respectively. CONCLUSION: MRI is particularly useful in cases where US is inconclusive and to assess the extent to which the placenta penetrates the uterine serosa and invades outward into surrounding tissues.MRI has become a routine examination for patients with suspected PA in clinical practice.

16.
Biotechnol Lett ; 34(12): 2183-90, 2012 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-22930002

RESUMO

An immortalized human hepatocyte cell line, HepLi5, was established via transfection of Simian virus 40 large T antigen (SV40 LT) into primary human hepatocytes. The morphologic and functional characteristics of HepLi5 cells were evaluated. The expression of SV40 LT in HepLi5 cells was detected by reverse transcription-PCR (RT-PCR) and western blotting. mRNA expression of liver-enriched genes, including glutamine synthetase, albumin, and cytochrome P450 was detected via RT-PCR in HepLi5 cells. Activity of CYP1A2, one of the drug-metabolizing P450 enzymes, was detected. Subcutaneous injection of HepLi5 cells into nude mice did not induce tumors within 3 months. Short Tandem Repeat results confirmed the authenticity of the cell line. Clinical-grade quantities of HepLi5 cells could be harvested using large-scale culture in roller bottles after which their cellular function was significantly enhanced. Therefore, the immortalized HepLi5 cells are a suitable cell source for applications in bioartificial livers.


Assuntos
Hepatócitos/fisiologia , Fígado Artificial , Animais , Western Blotting , Linhagem Celular , Transformação Celular Viral , Humanos , Camundongos , Camundongos Nus , RNA Mensageiro/biossíntese , RNA Viral/biossíntese , Reação em Cadeia da Polimerase Via Transcriptase Reversa , Vírus 40 dos Símios/genética , Transfecção
17.
Artigo em Inglês | MEDLINE | ID: mdl-36078330

RESUMO

The key to sustainable rural development and coordinated regional development is to properly measure the livelihood resilience of rural residents (LRRR), and investigate its regional differences, distribution characteristics, and evolutionary patterns. This study combined the entropy method, the Dagum Gini coefficient and decomposition, kernel density estimation, and convergence analysis to measure the LRRR in 30 provinces of China from 2006 to 2020, and to analyze its regional differences and sources, dynamic distribution, and characteristics of convergence. The LRRR in China overall declined 2006-2020, with an east-to-west spatial gradient toward lower livelihood resilience. Intra-regional differences in LRRR narrowed in the Eastern and Central Regions, while those in the Western Region widened. Inter-regional differences were the main source of differences in LRRR. The LRRRs in most provinces in China were gradually reaching the same level over time (i.e., σ convergence and ß convergence). This research provides a factual reference for policies related to reducing inter-provincial differences in the LRRR in China.


Assuntos
População Rural , Planejamento Social , China , Humanos , Análise Espacial , Análise Espaço-Temporal
18.
J Food Biochem ; 46(1): e14006, 2022 01.
Artigo em Inglês | MEDLINE | ID: mdl-34859904

RESUMO

The characterization and functionality of protein glycosylation among different related species are of common interest. Herein, non-standard quantification and N-glycosylation enrichment technology combined with ultra-high liquid chromatography-tandem mass spectrometry were used to establish detailed N-glycoproteomics of fertilized eggs, and quantitatively compared between Tibetan and lowland chicken. A total of 396N-glycosites from 143 glycoproteins were found. Specifically, compared with lowland chicken egg white, 32N-glycosites of 22 glycoproteins were up-regulated and 57N-glycosites of 25 glycoproteins were down-regulated in Tibetan chicken egg white. Also, 137N-glycosites in 72 glycoproteins showed much higher-degree glycosylation and 36N-glycosites in 15 glycoproteins displayed lower-degree glycosylation in Tibetan chicken egg yolk than those in lowland chicken egg yolk. Through bioinformatic analysis, these varied glycoproteins were highly associated with antifreeze activity, hypoxia adaptation, coagulation cascade, and binding/immunity activities, which may be related to plateau hypoxia and cold stress. PRACTICAL APPLICATIONS: These findings provide a new insight on the role of biological egg N-glycoproteins related to environmental adaptation and evolution, which may be further applied in improving egg processing and human health, by developing biomolecules for food and medical industry.


Assuntos
Galinhas , Proteínas do Ovo , Animais , Galinhas/metabolismo , Proteínas do Ovo/química , Gema de Ovo/química , Tibet , Zigoto/química , Zigoto/metabolismo
19.
Polymers (Basel) ; 14(15)2022 Aug 02.
Artigo em Inglês | MEDLINE | ID: mdl-35956673

RESUMO

At present, the synthesis methods of crystalline porous materials often involve powder products, which not only affects the practical application but also has complex synthesis operations and limited scale. Based on the mechanochemical method, we choose COF-TpPa-1, preparing TpPa-1-DANC composites. Covalent organic frameworks (COFs) are a kind of crystalline material formed by covalent bonds of light elements. COFs possess well pore structure and high thermal stability. However, the state of synthesized powders limits their application. Cellulose nanocrystals (CNCs) are promising renewable micron materials with abundant hydroxyl groups on their surface. It is possible to prepare high-strength materials such as film, water, and aerogel. Firstly, the nanocellulose was oxidized by the sodium periodate method to obtain aldehyde cellulose nanocrystals (DANC). TpPa-1-DANC not only had the crystal characteristic peak of COFs at 2θ ≈ 5° but also had a BET surface area of 247 m2/g. The chemical bonds between COFs and DANC formed by Schiff base reaction appeared in FTIR and XPS. The pyrolysis behavior of the composite was characterized by TG-IR, which showed that the composite had good thermal stability. With the advantages of nanocellulose as a material in every dimension, we believe that this method can be conducive to the large-scale synthesis of COFs composites, and has the possibility of multi-form synthesis of COFs.

20.
Front Pharmacol ; 12: 665894, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-33995092

RESUMO

Background: Sulforaphane (SFN), an isothiocyanate naturally occurring in cruciferous vegetables, is a potent indirect antioxidant and a promising agent for the control of metabolic disorder disease. The glucose intolerance and adipogenesis induced by diet in rats was inhibited by SFN. Strategies aimed at induction of brown adipose tissue (BAT) could be a potentially useful way to against obesity. However, in vivo protective effect of SFN against obesity by browning white adipocyte has not been reported. Our present study is aimed at evaluation the efficacy of the SFN against the high-fat induced-obesity mice and investigating the potential mechanism. Methods: High-Fat Diet-induced obese female C57BL/6 mice were intraperitoneally injected with SFN (10 mg/kg) daily. Body weight was recorded every 3 days. 30 days later, glucose tolerance test (GTT) and insulin tolerance test (ITT) were performed. At the end of experiment, fat mass were measured and the adipogenesis as well as browning associated genes expression in white adipose tissue (WAT) were determined by RT-qPCR and western blot. Histological examination of the adipose tissue samples were carried out with hematoxylin-eosin (HE) staining and immunofluorescence staining method. In vitro, pre-adipocytes C3H10T1/2 were treated with SFN to investigate the direct effects on adipogenesis. Results: SFN suppressed HFD-induced body weight gain and reduced the size of fat cells in mice. SFN suppressed the expression of key genes in adipogenesis, inhibited lipid accumulation in C3H10T1/2 cells, increased the expression of brown adipocyte-specific markers and mitochondrial biogenesis in vivo and in vitro, and decreased cellular and mitochondrial oxidative stress. These results suggested that SFN, as a nutritional factor, has great potential role in the battle against obesity by inducing the browning of white fat. Conclusion: SFN could significantly decrease the fat mass, and improve glucose metabolism and increase insulin sensitivity of HFD-induced obese mice by promoting the browning of white fat and enhancing the mitochondrial biogenesis in WAT. Our study proves that SFN could serve as a potential medicine in anti-obesity and related diseases.

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