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1.
Phytochemistry ; 217: 113912, 2024 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-37918620

RESUMO

Artemisia argyi Levl. Et Vant, commonly known as "Chinese Mugwort," has been utilized in traditional Chinese medicine and cuisine for centuries. Aged Chinese Mugwort has been uncovered to possess superior quality and safety, and its ethyl acetate extract has been found to exhibit anti-hepatitis B virus (HBV) activity. In this study, twenty-five sesquiterpenoids were isolated and characterized from three-year-aged A. argyi. Among them, 14 previously undescribed sesquiterpenoids (1-14), featuring double bond oxidation or ring opening. It is hypothesized that during the aging process, sesquiterpenes undergo oxidative transformation of their double bonds to form alcohols due to external factors and inherent properties. The anti-HBV activity and cytotoxicity of all compounds were assessed in vitro using HepG 2.2.15 cells, and their structure-activity relationships were analyzed through three-dimensional quantitative structure-activity relationship (3D-QASR) techniques. The α-methylene-γ-lactone sesquiterpenoid derivatives were discovered to have potent inhibitory activity against HBV. This research may broaden the potential applications of Chinese Mugwort and offer further guidance for its development and utilization as functional food or traditional Chinese medicine.


Assuntos
Artemisia , Sesquiterpenos , Vírus da Hepatite B , Relação Quantitativa Estrutura-Atividade , Artemisia/química , Medicina Tradicional Chinesa , Sesquiterpenos/farmacologia
2.
Zhongguo Zhong Yao Za Zhi ; 48(22): 6234-6248, 2023 Nov.
Artigo em Chinês | MEDLINE | ID: mdl-38114230

RESUMO

Bungarus Parvus, a precious animal Chinese medicinal material used in clinical practice, is believed to be first recorded in Ying Pian Xin Can published in 1936. This study was carried out to analyze the names, geographical distribution, morphological characteristics, ecological habits, poisonousness, and medicinal parts by consulting ancient Chinese medical books and local chronicles, Chinese Pharmacopeia, different processing standards of trditional Chinese medicine(TCM) decoction pieces, and modern literatures. The results showed that the earliest medicinal record of Bungarus Parvus was traced to 1894. In 1930, this medicinal material was used in the formulation of Annao Pills. The original animal, Bungarus multicinctus, was recorded by the name of "Bojijia" in 1521. The morphological characteristics, ecological habits, and poisonousness of the original animal are the same in ancient and modern records. The geographical distribution is similar between the ancient records and modern documents such as China Medicinal Animal Fauna. The dried body of young B. multicinctus is used as Bungarus Parvus, which lack detailed references. As a matter of fact, it is still inconclusive whether there are differences between young snakes and adult snakes in terms of active ingredients, pharmacological effects, and clinical applications. This study clarified the medicinal history and present situation of Bungarus Parvus. On the basis of the results, it is suggested that systematic comparison on young and adult B. multicinctus should be carried out to provide references for revising the medicinal parts of B. multicinctus.


Assuntos
Bungarus , Medicamentos de Ervas Chinesas , Animais , Serpentes , China , Medicina Tradicional Chinesa
3.
Fitoterapia ; 169: 105570, 2023 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-37321417

RESUMO

Saussurea lappa (Asteraceae family), a traditional Chinese medicine, has been found to possess anti-inflammatory, immune-promoting, antibacterial, antitumor, anti-HBV, cholestatic, and hepatoprotective activities. Herein, two undescribed amino acid-sesquiterpene lactone adducts, saussureamines G and H (1 and 2), and two new sesquiterpene glycosides, saussunosids F and G (3 and 4), along with 26 known sesquiterpenoids (5-30) have been isolated from the roots of S. lappa. Their structures and absolute configurations of these compounds were established by physical data analyses such as HRESIMS, IR, 1D and 2D NMR and ECD calculations. All isolated compounds were tested for anti-hepatitis B virus (anti-HBV) activity. Ten compounds (5, 6, 12, 13, 17, 19, 23, 26, 29, and 30) exhibited activities against the secretions of HBsAg and HBeAg. In particular, compound 6 showed inhibition of HBsAg and HBeAg secretion with IC50 values of 11.24 and 15.12 µM, with SI values of 1.25 and 0.93, respectively. Molecular docking studies were also conducted on the anti-HBV compounds. Overall, this study provides insights into the potential therapeutic uses of the compounds found in the roots of S. lappa, particularly in the treatment of hepatitis B virus infections.


Assuntos
Saussurea , Sesquiterpenos , Saussurea/química , Vírus da Hepatite B , Antígenos de Superfície da Hepatite B , Aminoácidos , Glicosídeos , Antígenos E da Hepatite B , Simulação de Acoplamento Molecular , Estrutura Molecular , Lactonas
4.
J Anim Physiol Anim Nutr (Berl) ; 107(4): 995-1005, 2023 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-36353940

RESUMO

Milk fat globules (MFGs) surround the triacylglycerol core that composes milk fat. The aim of this study is to induce milk fat depression via dietary conjugated linoleic acid (CLA) supplementation to study MFG size parameters, number and glycerophospholipid composition. Eighteen Holstein dairy cows (136 ± 28 days in milk, 571 ± 37.9 kg body weight, 27.6 ± 2.1 kg milk/day) were selected and randomly assigned to a control or CLA group for a 14-day period. Cows were fed a basal diet (control, n = 8) or the control plus 400 g/day CLA (C18:2 cis-9, trans-11 38.1% and C18:2 trans-10, cis-12 36.8%) (n = 10) for 7 days after which the CLA group was switched to the basal diet for another 7 days along with the control group. Cow performance, milk composition, MFG size and numbers were measured daily. On the seventh day after the start of the experiment, milk samples were identified and the quantification of glycerophospholipid compounds, and RNA were isolated from milk fat samples for a real-time polymerase chain reaction. Compared with control, at Day 7 from the start of feeding, supplemental CLA did not affect milk production (28.09 vs. 28.50 kg/day), dry matter intake (14.9 vs. 15.4 kg/day), or milk protein (3.55/100 vs. 3.70 g/100 ml) and lactose contents (5.11/100 vs. 5.17 g/100 ml). However, although the specific surface area of MFG (2138 vs. 1815 m²/kg) was greater, CLA reduced milk fat content (1.95/100 vs 3.64 g/100 ml on Day 7) and particle size parameters of MFG. The number of MFG gradually decreased until Day 7 of feeding, and then increased by Day 14 (2.96 × 109 on Day 1, 1.63 × 109 on Day 7 and 2.28 × 109 on Day 14) in the CLA group. Compared with control, glycerophospholipid analysis revealed that concentrations of phosphatidylcholine (PC) (e.g., PC [16:0/18:1] 20322 vs. 29793 nmol/L), lysophosphatidylethanolamine (LPE) (e.g., LPE [18:1] 956 vs. 4610 nmol/L) and phosphatidylethanolamine (PE) (e.g., PE [16:0/18:1] 7000 vs. 9769 nmol/L) in milk lipids decreased during CLA feeding. In contrast, concentrations of phosphatidylinositol (PI) (e.g., PI [18:0/18:1] 4052 vs. 1799 nmol/L) and phosphatidylserine (PS) (e.g., PS [18:1/18:2] 9500 vs. 6843 nmol/L) increased. The messenger RNA abundance of fatty acid synthase, diacylglycerol O-acyltransferase 1, glycerol-3-phosphate acyltransferase 4 and phosphate cytidylyltransferase 1, choline, alpha (PCYT1A) were downregulated in the CLA group, confirming published data demonstrating a negative effect of CLA on lipogenesis in the mammary gland. Overall, these results provided evidence for the important role of lipogenic gene expression in the regulation of MFG size, number and glycerophospholipid composition.


Assuntos
Ácidos Linoleicos Conjugados , Feminino , Animais , Bovinos , Ácidos Linoleicos Conjugados/farmacologia , Lactação/fisiologia , Ácidos Graxos/metabolismo , Fosfolipídeos , Dieta/veterinária , Glicerofosfolipídeos/farmacologia , Suplementos Nutricionais/análise
5.
Acta Pharmaceutica Sinica ; (12): 217-228, 2023.
Artigo em Chinês | WPRIM | ID: wpr-964305

RESUMO

italic>Ardisia crispa (Thunb.) A. DC. is a traditional Miao medicinal herb with significant therapeutic effects in the treatment of sore throat, tonsillitis, edema of nephritis and bruising and rheumatism, etc. Ardisia crispa var. amplifolia and Ardisia crispa var. dielsii are varieties of A. crispa. A. crispa var. amplifolia and A. crispa var. dielsii are controversial in terms of species evolutionary relationships and taxonomic identification. In this study, we sequenced the whole genome sequences of A. crispa var. amplifolia and A. crispa var. dielsii chloroplasts using Illumina platform, assembled, annotated and characterized them, compared the structural features and degree of variation among chloroplast genomes using bioinformatics methods, and also downloaded constructing phylogenetic trees to analyze the phylogenetic relationships of chloroplasts in Primulaceae and Myrsinaceae using whole genome sequence information. The results showed that the complete chloroplast genome sequences of A. crispa var. amplifolia and A. crispa var. dielsii were 156 749 bp and 156 748 bp in length, with 132 genes annotated, including 87 protein-coding genes; the codon preference of A/U was greater than that of G/C; The differences in the coding regions of rps15 and rpoB genes in the comparative genome analysis can be used as loci for molecular identification of the two species; the differences in the coding regions of ycf1, ycf2, rpoC1, ycf3, petD and rpl16 genes in the chloroplast genome compared with those of the same genus can be used as loci for identification of the genus. In the phylogenetic results, A. crispa var. amplifolia and A. crispa var. dielsii were clustered together with 100% support, indicating that they are closely related. In this research, we analyzed the chloroplast genome structure and phylogenetic relationships of A. crispa var. amplifolia and A. crispa var. dielsii, providing an important theoretical basis for their molecular identification, genetic variation, breeding and phylogenetic analysis.

6.
Mitochondrial DNA B Resour ; 7(12): 2060-2062, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-36518732

RESUMO

In this study, we assembled and characterized the complete chloroplast (cp) genome of Angelonia angustifolia Benth., 1846, a herbaceous and perennial plant, native to Latin America. It is an ornamental and medicinal plant that showed bright prospects for application. The cp genome of A. angustifolia has a typical conserved quadripartite structure of 154,316 bp in total length. The genome includes a large single-copy (LSC) region (84,110 bp), a small single-copy (SSC) region (15,950 bp), and a pair of inverted repeat (IR) regions (27,128 bp). The cp genome contains 130 genes comprising 85 protein-coding, 37 tRNA, and 8 rRNA genes. Phylogenetic analysis indicates that A. angustifolia is closely related to Bacopa monnieri, Scoparia dulcis, and Limnophila sessiliflora in the Plantaginaceae. Taken together, the complete cp genomes of A. angustifolia provided significant insights and important information for molecular biology, evolution, and taxonomy in the genus Angelonia.

7.
Pacing Clin Electrophysiol ; 45(9): 1042-1050, 2022 09.
Artigo em Inglês | MEDLINE | ID: mdl-35883271

RESUMO

INTRODUCTION: Mitral valve surgery employing a superior transseptal approach (STA) is associated with arrhythmogenicity and intra-atrial conduction delay, despite being optimal for visualization of the surgical field. It is sometimes difficult to treat atrial tachycardias (AT) that arise after STA. To investigate AT circuits that arise after STA in detail in order to identify the optimal ablation line, using ultra-high-resolution mapping (UHRM). METHODS: We retrospectively analyzed 12 AT from 10 patients (median age 70 years, nine males) who had undergone STA surgery. The tachycardias were mapped using the Rhythmia mapping system (Boston Scientific, Natick, Massachusetts). RESULTS: The 12 STA-related AT (STA-AT) circuits were classifiable as follows according to location of the optimal ablation line: (1) peri-septal incision STA-AT (n = 3), (2) cavotricuspid isthmus (CTI) dependent STA-AT (n = 7), and (3) biatrial tachycardia (n = 2). Radiofrequency (RF) application terminated 11 of the 12 STA-AT. We found that difference in STA-AT circuit type was due to characteristics of the septal incision line made for STA. UHRM was important in identifying optimal ablation sites that did not create additional conduction disturbances in the right atrium (RA). CONCLUSIONS: ATs after STA involve complex arrhythmia circuits due to multiple and long incision lines in the RA. Accurate understanding of the arrhythmia circuit and sinus conduction in the RA after STA is recommended for treating post-surgical tachycardia in a minimally invasive manner.


Assuntos
Bloqueio Atrioventricular , Ablação por Cateter , Taquicardia Supraventricular , Idoso , Arritmias Cardíacas/cirurgia , Bloqueio Atrioventricular/cirurgia , Técnicas Eletrofisiológicas Cardíacas , Humanos , Masculino , Valva Mitral/cirurgia , Estudos Retrospectivos , Taquicardia , Taquicardia Supraventricular/etiologia , Taquicardia Supraventricular/prevenção & controle , Taquicardia Supraventricular/cirurgia , Resultado do Tratamento
8.
Theranostics ; 12(3): 1220-1246, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35154484

RESUMO

Background: Obesity is becoming a global epidemic and reversing the pathological processes underlying obesity and metabolic co-morbidities is challenging. Obesity induced chronic inflammation including brain inflammation is a hallmark of obesity via the gut-brain axis. The objective of this study was to develop garlic exosome-like nanoparticles (GaELNs) that inhibit systemic as well as brain inflammatory activity and reverse a HFD induced obesity in mice. Methods: GELNs were isolated and administrated orally into HFD fed mice. GaELNs were fluorescent labeled for monitoring their in vivo trafficking route after oral administration and quantified the number particles in several tissues. The brain inflammation was determined by measuring inflammatory cytokines by ELISA and real-time PCR. Mitochondrial membrane permeability of microglial cells was determined using JC-10 fluorescence dye. The in vivo apoptotic cell death was quantified by TUNEL assay. The brain metabolites were identified and quantified by LC-MS analysis. Memory function of the mice was determined by several memory functional analysis. The effect of GaELNs on glucose and insulin response of the mice was determined by glucose and insulin tolerance tests. c-Myc localization and interaction with BASP1 and calmodulin was determined by confocal microscopy. Results: Our results show that GaELNs is preferentially taken up microglial cells and inhibits the brain inflammation in HFD mice. GaELN phosphatidic acid (PA) (36:4) is required for the uptake of GaELNs via interaction with microglial BASP1. Formation of the GaELNs/BASP1 complex is required for inhibition of c-Myc mediated expression of STING. GaELN PA binds to BASP1, leading to inhibition of c-Myc expression and activity through competitively binding to CaM with c-Myc transcription factor. Inhibition of STING activity leads to reducing the expression of an array of inflammatory cytokines including IFN-γ and TNF-α. IFN-γ induces the expression of IDO1, which in turn the metabolites generated as IDO1 dependent manner activate the AHR pathway that contributes to developing obesity. The metabolites derived from the GaELNs treated microglial cells promote neuronal differentiation and inhibit mitochondrial mediated neuronal cell death. GaELNs treated HFD mice showed improved memory function and increased glucose tolerance and insulin sensitivity in these mice. Conclusion: Collectively, these results demonstrate how nanoparticles from a healthy diet can inhibit unhealthy high-fat diet induced brain inflammation and reveal a link between brain microglia/diet to brain inflammatory disease outcomes via diet-derived exosome-like nanoparticles.


Assuntos
Encefalite , Alho , Nanopartículas , Animais , Antioxidantes , Encéfalo/metabolismo , Citocinas/metabolismo , Dieta Hiperlipídica/efeitos adversos , Alho/metabolismo , Glucose , Inflamação/metabolismo , Insulina , Camundongos , Camundongos Endogâmicos C57BL , Obesidade/metabolismo
9.
Mitochondrial DNA B Resour ; 6(12): 3388-3390, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34790871

RESUMO

Eria lasiopetala (Willd.) Ormerod is an important ornamental plant and traditional Chinese medicine resource, but it is currently listed as a class II protected species due to its few resources in China. To further clarify the taxonomic status as well as provide genetic information for its conservation, the chloroplast genome of E. lasiopetala was assembled and characterized in this study. Results show that the genome is 158,740 bp in length, including a large single copy, two inverted repeats, and a small single copy, their lengths are 88,062, 26,213, and 18,252 bp, respectively. There are 132 genes in the chloroplast genome, among which the number of encoding protein genes, rRNA genes, and tRNA genes are 86, 8, and 38, respectively. The phylogenetic tree clearly shows that E. lasiopetala and Eria corneri cluster together with 100% support, rather than with Dendrobium group.

10.
Nutrients ; 10(1)2018 Jan 12.
Artigo em Inglês | MEDLINE | ID: mdl-29329215

RESUMO

Yellow tea has been widely recognized for its health benefits. However, its effects and mechanism are largely unknown. The current study investigated the mechanism of dietary supplements of large yellow tea and its effects on metabolic syndrome and the hepatic steatosis in male db/db mice. Our data showed that dietary supplements of large yellow tea and water extract significantly reduced water intake and food consumption, lowered the serum total and low-density lipoprotein cholesterol and triglyceride levels, and significantly reduced blood glucose level and increased glucose tolerance in db/db mice when compared to untreated db/db mice. In addition, the dietary supplement of large yellow tea prevented the fatty liver formation and restored the normal hepatic structure of db/db mice. Furthermore, the dietary supplement of large yellow tea obviously reduced the lipid synthesis related to gene fatty acid synthase, the sterol regulatory element-binding transcription factor 1 and acetyl-CoA carboxylase α, as well as fatty acid synthase and sterol response element-binding protein 1 expression, while the lipid catabolic genes were not altered in the liver of db/db mice. This study substantiated that the dietary supplement of large yellow tea has potential as a food additive for ameliorating type 2 diabetes-associated symptoms.


Assuntos
Suplementos Nutricionais , Fígado Gorduroso/tratamento farmacológico , Síndrome Metabólica/tratamento farmacológico , Chá/química , Acetil-CoA Carboxilase/sangue , Animais , Glicemia/metabolismo , LDL-Colesterol/sangue , Modelos Animais de Doenças , Ácido Graxo Sintases/sangue , Metabolismo dos Lipídeos/efeitos dos fármacos , Camundongos , Camundongos Endogâmicos C57BL , Extratos Vegetais/farmacologia , Proteína de Ligação a Elemento Regulador de Esterol 1 , Triglicerídeos/sangue
11.
Mol Ther ; 25(7): 1641-1654, 2017 07 05.
Artigo em Inglês | MEDLINE | ID: mdl-28274798

RESUMO

The intestinal immune system is continuously exposed to massive amounts of nanoparticles derived from food. Whether nanoparticles from plants we eat daily have a role in maintaining intestinal immune homeostasis is poorly defined. Here, we present evidence supporting our hypothesis that edible nanoparticles regulate intestinal immune homeostasis by targeting dendritic cells (DCs). Using three mouse colitis models, our data show that orally given nanoparticles isolated from broccoli extracts protect mice against colitis. Broccoli-derived nanoparticle (BDN)-mediated activation of adenosine monophosphate-activated protein kinase (AMPK) in DCs plays a role in not only prevention of DC activation but also induction of tolerant DCs. Adoptively transferring DCs pre-pulsed with total BDN lipids, but not sulforaphane (SFN)-depleted BDN lipids, prevented DSS-induced colitis in C57BL/6 (B6) mice, supporting the role of BDN SFN in the induction of DC tolerance. Adoptively transferring AMPK+/+, but not AMPK-/-, DCs pre-pulsed with SFN prevented DSS-induced colitis in B6 mice, further supporting the DC AMPK role in SFN-mediated prevention of DSS-induced colitis. This finding could open new preventive or therapeutic avenues to address intestinal-related inflammatory diseases via activating AMPK.


Assuntos
Proteínas Quinases Ativadas por AMP/genética , Anti-Inflamatórios/farmacologia , Brassica/química , Colite Ulcerativa/prevenção & controle , Células Dendríticas/efeitos dos fármacos , Nanopartículas/química , Proteínas Quinases Ativadas por AMP/metabolismo , Administração Oral , Transferência Adotiva , Animais , Anti-Inflamatórios/química , Anti-Inflamatórios/metabolismo , Colite Ulcerativa/induzido quimicamente , Colite Ulcerativa/imunologia , Colite Ulcerativa/patologia , Células Dendríticas/imunologia , Células Dendríticas/patologia , Células Dendríticas/transplante , Modelos Animais de Doenças , Ativação Enzimática/efeitos dos fármacos , Expressão Gênica , Humanos , Tolerância Imunológica , Isotiocianatos/química , Lipídeos/isolamento & purificação , Lipídeos/farmacologia , Camundongos , Camundongos Endogâmicos C57BL , Nanopartículas/administração & dosagem , Extratos Vegetais/química , Dodecilsulfato de Sódio , Sulfóxidos
12.
Oncotarget ; 7(18): 25683-97, 2016 May 03.
Artigo em Inglês | MEDLINE | ID: mdl-27028860

RESUMO

Liver metastasis accounts for many of the cancer deaths in patients. Effective treatment for metastatic liver tumors is not available. Here, we provide evidence for the role of miR-18a in the induction of liver M1 (F4/80+interferon gamma (IFNγ)+IL-12+) macrophages. We found that miR-18a encapsulated in grapefruit-derived nanovector (GNV) mediated inhibition of liver metastasis that is dependent upon the induction of M1 (F4/80+IFNγ+IL-12+) macrophages; depletion of macrophages eliminated its anti-metastasis effect. Furthermore, the miR-18a mediated induction of macrophage IFNγ by targeting IRF2 is required for subsequent induction of IL-12. IL-12 then activates natural killer (NK) and natural killer T (NKT) cells for inhibition of liver metastasis of colon cancer. This conclusion is supported by the fact that knockout of IFNγ eliminates miR-18a mediated induction of IL-12, miR-18a treatment has an anti-metastatic effects in T cell deficient mice but there is no anti-metastatic effect on NK and NKT deficient mice. Co-delivery of miR-18a and siRNA IL-12 to macrophages did not result in activation of co-cultured NK and NKT cells. Taken together our results indicate that miR-18a can act as an inhibitor for liver metastasis through induction of M1 macrophages.


Assuntos
Citrus paradisi , Neoplasias do Colo/patologia , Terapia Genética/métodos , Neoplasias Hepáticas/secundário , Ativação de Macrófagos/efeitos dos fármacos , MicroRNAs/farmacologia , Animais , Neoplasias do Colo/tratamento farmacológico , Neoplasias do Colo/imunologia , Vetores Genéticos , Lipídeos , Neoplasias Hepáticas/tratamento farmacológico , Neoplasias Hepáticas/imunologia , Macrófagos/imunologia , Camundongos , MicroRNAs/imunologia , Nanopartículas , Extratos Vegetais
13.
Sci Rep ; 6: 23742, 2016 Mar 30.
Artigo em Inglês | MEDLINE | ID: mdl-27026206

RESUMO

Emerging evidence suggests that neuroinflammation and oxidative stress may be major contributors to major depressive disorder (MDD). Patients or animal models of depression show significant increase of proinflammatory cytokine interleukin-1ß (IL-1ß) and oxidative stress biomarkers in the periphery or central nervous system (CNS). Recent studies show that hydrogen selectively reduces cytotoxic oxygen radicals, and hydrogen-rich saline potentially suppresses the production of several proinflammatory mediators. Since current depression medications are accompanied by a wide spectrum of side effects, novel preventative or therapeutic measures with fewer side effects might have a promising future. We investigated the effects of drinking hydrogen-rich water on the depressive-like behavior in mice and its underlying mechanisms. Our study show that hydrogen-rich water treatment prevents chronic unpredictable mild stress (CUMS) induced depressive-like behavior. CUMS induced elevation in IL-1ß protein levels in the hippocampus, and the cortex was significantly attenuated after 4 weeks of feeding the mice hydrogen-rich water. Over-expression of caspase-1 (the IL-1ß converting enzyme) and excessive reactive oxygen species (ROS) production in the hippocampus and prefrontal cortex (PFC) was successfully suppressed by hydrogen-rich water treatment. Our data suggest that the beneficial effects of hydrogen-rich water on depressive-like behavior may be mediated by suppression of the inflammasome activation resulting in attenuated protein IL-1ß and ROS production.


Assuntos
Transtorno Depressivo Maior/tratamento farmacológico , Hidrogênio/administração & dosagem , Administração Oral , Animais , Caspase 1/metabolismo , Transtorno Depressivo Maior/metabolismo , Avaliação Pré-Clínica de Medicamentos , Hipocampo/efeitos dos fármacos , Hipocampo/enzimologia , Masculino , Camundongos Endogâmicos BALB C , Estresse Oxidativo , Córtex Pré-Frontal/efeitos dos fármacos , Córtex Pré-Frontal/enzimologia , Espécies Reativas de Oxigênio/metabolismo , Estresse Psicológico/tratamento farmacológico , Água/administração & dosagem
14.
Mol Ther ; 24(1): 96-105, 2016 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-26444082

RESUMO

The lack of access to the brain is a major obstacle for central nervous system drug development. In this study, we demonstrate the capability of a grapefruit-derived nanovector (GNV) to carry miR17 for therapeutic treatment of mouse brain tumor. We show that GNVs coated with folic acid (FA-GNVs) are enhanced for targeting the GNVs to a folate receptor-positive GL-26 brain tumor. Additionally, FA-GNV-coated polyethylenimine (FA-pGNVs) not only enhance the capacity to carry RNA, but the toxicity of the polyethylenimine is eliminated by the GNVs. Intranasal administration of miR17 carried by FA-pGNVs led to rapid delivery of miR17 to the brain that was selectively taken up by GL-26 tumor cells. Mice treated intranasally with FA-pGNV/miR17 had delayed brain tumor growth. Our results demonstrate that this strategy may provide a noninvasive therapeutic approach for treating brain-related disease through intranasal delivery.


Assuntos
Neoplasias Encefálicas/terapia , Citrus paradisi/química , Terapia Genética/métodos , MicroRNAs/administração & dosagem , MicroRNAs/genética , Nanopartículas/química , Administração Intranasal , Animais , Neoplasias Encefálicas/genética , Linhagem Celular Tumoral , Progressão da Doença , Ácido Fólico/uso terapêutico , Camundongos , Nanopartículas/administração & dosagem , Especificidade de Órgãos , Extratos Vegetais/administração & dosagem , Extratos Vegetais/química , Polietilenoimina/química , Resultado do Tratamento , Ensaios Antitumorais Modelo de Xenoenxerto
15.
J Biol Chem ; 290(25): 15799-15811, 2015 Jun 19.
Artigo em Inglês | MEDLINE | ID: mdl-25969534

RESUMO

Little is known about the regulation of the oncomiR miR-21 in liver. Dehydroepiandrosterone (DHEA) regulates gene expression as a ligand for a G-protein-coupled receptor and as a precursor for steroids that activate nuclear receptor signaling. We report that 10 nm DHEA increases primary miR-21 (pri-miR-21) transcription and mature miR-21 expression in HepG2 cells in a biphasic manner with an initial peak at 1 h followed by a second, sustained response from 3-12 h. DHEA also increased miR-21 in primary human hepatocytes and Hep3B cells. siRNA, antibody, and inhibitor studies suggest that the rapid DHEA-mediated increase in miR-21 involves a G-protein-coupled estrogen receptor (GPER/GPR30), estrogen receptor α-36 (ERα36), epidermal growth factor receptor-dependent, pertussis toxin-sensitive pathway requiring activation of c-Src, ERK1/2, and PI3K. GPER antagonist G-15 attenuated DHEA- and BSA-conjugated DHEA-stimulated pri-miR-21 transcription. Like DHEA, GPER agonists G-1 and fulvestrant increased pri-miR-21 in a GPER- and ERα36-dependent manner. DHEA, like G-1, increased GPER and ERα36 mRNA and protein levels. DHEA increased ERK1/2 and c-Src phosphorylation in a GPER-responsive manner. DHEA increased c-Jun, but not c-Fos, protein expression after 2 h. DHEA increased androgen receptor, c-Fos, and c-Jun recruitment to the miR-21 promoter. These results suggest that physiological concentrations of DHEA activate a GPER intracellular signaling cascade that increases pri-miR-21 transcription mediated at least in part by AP-1 and androgen receptor miR-21 promoter interaction.


Assuntos
Adjuvantes Imunológicos/farmacologia , Carcinoma Hepatocelular/metabolismo , Desidroepiandrosterona/farmacologia , Neoplasias Hepáticas/metabolismo , MicroRNAs/biossíntese , RNA Neoplásico/biossíntese , Receptores de Estrogênio/metabolismo , Receptores Acoplados a Proteínas G/metabolismo , Transcrição Gênica/efeitos dos fármacos , Proteína Tirosina Quinase CSK , Carcinoma Hepatocelular/genética , Carcinoma Hepatocelular/patologia , Receptor alfa de Estrogênio/genética , Receptor alfa de Estrogênio/metabolismo , Feminino , Regulação Neoplásica da Expressão Gênica/efeitos dos fármacos , Regulação Neoplásica da Expressão Gênica/genética , Células Hep G2 , Humanos , Neoplasias Hepáticas/genética , Neoplasias Hepáticas/patologia , Sistema de Sinalização das MAP Quinases/efeitos dos fármacos , Sistema de Sinalização das MAP Quinases/genética , Masculino , MicroRNAs/genética , Proteína Quinase 1 Ativada por Mitógeno/genética , Proteína Quinase 1 Ativada por Mitógeno/metabolismo , Proteína Quinase 3 Ativada por Mitógeno/genética , Proteína Quinase 3 Ativada por Mitógeno/metabolismo , Fosfatidilinositol 3-Quinases/genética , Fosfatidilinositol 3-Quinases/metabolismo , Proteínas Proto-Oncogênicas c-fos/genética , Proteínas Proto-Oncogênicas c-fos/metabolismo , Proteínas Proto-Oncogênicas c-jun/genética , Proteínas Proto-Oncogênicas c-jun/metabolismo , RNA Neoplásico/genética , Receptores Androgênicos/genética , Receptores Androgênicos/metabolismo , Receptores de Estrogênio/genética , Receptores Acoplados a Proteínas G/genética , Elementos de Resposta , Fator de Transcrição AP-1/genética , Fator de Transcrição AP-1/metabolismo , Transcrição Gênica/genética , Quinases da Família src/genética , Quinases da Família src/metabolismo
16.
Fitoterapia ; 80(4): 237-40, 2009 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-19239922

RESUMO

The fungitoxic metabolites of Spiraea alpina Pall. were identified using inhibition of Rhizoctonia solani, Gibberella zeae, Pyricularia oryzea and Exserohilum turcicum as an end-point. The major fungitoxic constituent of S. alpina was a new diacylated sugar, structurally elucidated as 6-O-(3',4'-dihydroxy-2'-methylenbutyryl)-1-O-trans-cinnamoyl-beta-D-glucopyranose. This compound could inhibit at 0.1 mg/ml Rhizoctonia solani and Exserohilum turcicum, 87.6% and 63.2%, respectively.


Assuntos
Antifúngicos/farmacologia , Cinamatos/farmacologia , Fungos/efeitos dos fármacos , Glucosídeos/farmacologia , Extratos Vegetais/farmacologia , Spiraea/química , Antifúngicos/química , Antifúngicos/isolamento & purificação , Cinamatos/química , Cinamatos/isolamento & purificação , Glucosídeos/química , Glucosídeos/isolamento & purificação , Estrutura Molecular , Extratos Vegetais/química , Extratos Vegetais/isolamento & purificação , Folhas de Planta
17.
Zhongguo Zhong Yao Za Zhi ; 33(7): 854-9, 2008 Apr.
Artigo em Chinês | MEDLINE | ID: mdl-18589794

RESUMO

There are 63 species Melastomataceae plants in 17 genus, which widely distribute along Yangtze River and the south of China ranging from Tibet autonomous region to Taiwan province. They used as herb medicine in China. A large part of the Melastomataceae plants have bitter, pungent and sweet taste. The meridian distribution of them is liver, spleen and stomach, they have many functions such as "cure rheumatism", "clear heat" and "detoxication", "regulate the flow of qi and alleviate pain", "diuresis and detumescence", "activate the blood and eliminate stasis". Melastomataceae plants not only have exact medical value, but also have abundant resource. So it has very bright perspective of exploitation and utilization.


Assuntos
Medicamentos de Ervas Chinesas/farmacologia , Melastomataceae , Adulto , Criança , China , Medicamentos de Ervas Chinesas/uso terapêutico , Feminino , Humanos , Masculino , Melastomataceae/química , Melastomataceae/classificação , Fitoterapia , Gravidez
18.
Bioresour Technol ; 99(9): 3900-7, 2008 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-17888652

RESUMO

Rhizopus chinensis CCTCC M201021 was a versatile strain capable of producing whole-cell lipase with synthetic activity in submerged fermentation. In order to improve the production of whole-cell lipase and study the culture conditions systematically, the combination of taguchi method and response surface methodology was performed. Taguchi method was used for the initial optimization, and eight factors viz., maltose, olive oil, peptone, K2HPO4, agitation, inoculum size, fermentation volume and pH were selected for this study. The whole-cell lipase activity yield was two times higher than the control experiment under initial optimal conditions, and four significant factors (inoculum, olive oil, fermentation volume and peptone) were selected to test the effect on the lipase production using response surface methodology. The optimal fermentation parameters for enhanced whole-cell lipase yield were found to be: inoculum 4.25 x 10(8) spores/L, olive oil 2.367% (w/v), fermentation volume 18 mL/250 mL flask, peptone 4.06% (w/v). Subsequent experimental trails confirmed the validity of the model. These optimal culture conditions in the shake flask led to a lipase yield of 13875 U/L, which 120% increased compare with the non-optimized conditions.


Assuntos
Biotecnologia/métodos , Fermentação , Lipase/biossíntese , Rhizopus/citologia , Rhizopus/enzimologia , Análise de Variância , Azeite de Oliva , Peptonas , Óleos de Plantas
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