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1.
Food Res Int ; 172: 113234, 2023 10.
Artigo em Inglês | MEDLINE | ID: mdl-37689964

RESUMO

The precious medicinal plant, Amomum tsao-ko Crevost et Lemarié, is the nectariferous plant from which the rare Amomum tsao-ko Crevost et Lemarié honey (ATH) is produced. Presently, chemical markers for authentication of this honey are not available due to the lack of data on its chemical composition. Here, we analyzed the volatile components and their odor activity values (OAVs), which revealed that the unique aroma was mildly flowery and fruity, accompanied by subtle sweet and fresh undertones. Since non-volatile chemicals are more reliable markers for routine authentication, we used a metabolomic approach combined with NMR-based identification to find and confirm a suitable compound to unambiguously distinguish ATH from other honeys. Isorhamnetin 3-O-neohesperidoside ranged from 3.62 to 9.38 mg/kg in ATH and was absent in the other tested honeys. In sum, the study uncovered unique chemical characteristics of ATH that will be helpful to control its quality.


Assuntos
Amomum , Mel , Cromatografia Gasosa-Espectrometria de Massas , Cromatografia Líquida , Especiarias , Espectrometria de Massas em Tandem
2.
Food Chem ; 425: 136495, 2023 Nov 01.
Artigo em Inglês | MEDLINE | ID: mdl-37276665

RESUMO

Bee pollen is a byproduct of pollination, which is a necessary process to produce foods. However, bee pollen can induce significant food-borne allergies. We previously identified a bee pollen-derived pan-allergen in the profilin family, Bra c p. Herein, we aimed to reduce Bra c p allergenicity via protein oxidation with hydrogen peroxide and explore the changes induced. Ion-mobility mass spectrometry revealed aggregation of the oxidized product; we also found irreversible sulfonation of the free sulfhydryl group of the Bra c p Cys98 residue to a more stable cysteine derivative. A significant proportion of the α-helices in Bra c p were transformed into ß-sheets after oxidation, masking the antigenic epitopes. An immunoassay demonstrated that the IgE-binding affinity of Bra c p was decreased in vitro after oxidation. To our knowledge, this is the first report describing the application of protein oxidation to reduce the allergenicity of profilin family member in foods.


Assuntos
Alérgenos , Profilinas , Abelhas , Animais , Profilinas/análise , Pólen/química , Peróxido de Hidrogênio/análise , Peróxidos/análise , Proteínas de Plantas/análise , Reações Cruzadas
3.
Food Chem ; 406: 135075, 2023 Apr 16.
Artigo em Inglês | MEDLINE | ID: mdl-36462363

RESUMO

Profilin family members are potential pan-allergens in foods, presenting public health hazards. However, studies on the allergenicity modification of profilin allergens are limited. Herein, quercetin and its glycosides (isoquercitrin and rutin) were applied to modify the allergenicity of a profilin allergen (Bra c p) from Brassica campestris bee pollen. Results showed that only quercetin can be closely covalently bound to Bra c p among the three, and the binding site was located at the Cys98 residue. After covalently conjunction, the relative content of α-helix structure in Bra c p was reduced by 40.05%, while random coil was increased by 42.89%; moreover, the Tyr and Phe residues in Bra c p were masked. These structural changes could alter the conformational antigenic epitopes of Bra c p, resulting in its allergenicity reduction. Our findings might provide a technical foundation for reducing the allergenicity of bee pollen and foods containing profilin family allergens.


Assuntos
Alérgenos , Pólen , Animais , Abelhas , Profilinas/metabolismo , Quercetina/metabolismo , Glicosídeos/metabolismo , Imunoglobulina E , Proteínas de Plantas/metabolismo
4.
Food Chem ; 404(Pt A): 134312, 2023 Mar 15.
Artigo em Inglês | MEDLINE | ID: mdl-36244068

RESUMO

Astragalus membranaceus var. mongholicus Hsiao (Am) is a widely used traditional Chinese herbal medicine. The monofloral honey from Am plant nectar collected by honeybees (MH-Am) has potential medicinal activities. Quality control of MH-Am requires discovery of characteristic markers. In this study, calycosin and formononetin were identified as reliable chemical markers for MH-Am authentication, which were shared with its plant (P-Am), but absent in other honeys based on untargeted mass spectrometry (MS) analysis. The contents of calycosin and formononetin in MH-Am, other honeys and P-Am were determined through a targeted MS-based quantitative approach. Furthermore, free radical scavenging assays showed that calycosin functioned directly in the antioxidative activity of MH-Am. Thus, calycosin has great potential to be certified as a bioactive marker contributing to future quality control of commercial MH-Am products.


Assuntos
Astragalus propinquus , Mel , Animais , Astragalus propinquus/química , Espectrometria de Massas
5.
Nutrients ; 14(19)2022 Sep 24.
Artigo em Inglês | MEDLINE | ID: mdl-36235629

RESUMO

Queen bee larva (QBL) is one kind of important edible insect that is harvested during royal jelly production process. QBL has many physiological functions; however, limited information is available regarding its antiaging effects. In this study, the antiaging function of freeze-dried QBL powder (QBLP) was investigated by combining the Caenorhabditis elegans (C. elegans) model and transcriptomics. The administration of QBLP to C. elegans was shown to improve lifespan parameters. Additionally, QBLP improved the mobility of nematodes. Transcriptome analysis showed the differentially expressed genes (DEGs) were significantly enriched in Gene Ontology (GO) terms that were almost all related to the biological functions of cell metabolism and stress, which are associated with lifespan. The Kyoto Encyclopedia of Genes and Genomes (KEGG) analysis suggested that the lifespan of C. elegans was related to the longevity regulating pathway-worm. The expression levels of the key genes sod-3, gst-6, hsp-12.6, lips-7, ins-8, and lips-17 were upregulated. sod-3, hsp-12.6, lips-7, and lips-17 are downstream targets of DAF-16, which is an important transcription factor related to lifespan extension. CF1038 (daf-16(mu86)) supplemented with QBLP did not show a life-prolonging. This indicates that the antiaging function of QBLP is closely related to daf-16. Thus, QBLP is a component that could potentially be used as a functional material to ameliorate aging and aging-related symptoms.


Assuntos
Proteínas de Caenorhabditis elegans , Caenorhabditis elegans , Animais , Abelhas , Caenorhabditis elegans/fisiologia , Proteínas de Caenorhabditis elegans/metabolismo , Suplementos Nutricionais , Fatores de Transcrição Forkhead/metabolismo , Larva , Longevidade/fisiologia , Estresse Oxidativo , Pós
6.
Food Res Int ; 158: 111572, 2022 08.
Artigo em Inglês | MEDLINE | ID: mdl-35840258

RESUMO

Bee pollen as a plant-derived food is consumed as nutritional/functional supplements by humans. But it might confer foodborne allergenicity in susceptible populations, limiting its extensive application. In this study, five potential allergens including profilin, cystatin, prolamin, expansin, and alcohol dehydrogenase in bee pollen derived from Brassica campestris (BP-Bc), were identified through mass spectrometry-based proteomic analysis. Moreover, different types of enzymes (cellulases, pectases, and papains) serve biological roles in pollen wall breaking and expansion, but also promote allergen release and degradation. Proteomic analysis showed that profilin, cystatin, and alcohol dehydrogenase were significantly reduced in BP-Bc following joint treatment with three enzymes. Metabolomic characterization of potential enzymatic hydrolysates of these significantly-decreased allergens was performed, which showed nine major oligopeptides and six amino acids at significantly higher levels in the enzyme-treated BP-Bc. These findings clarified the culprit responsible for bee pollen allergy and the mechanism of enzymatic desensitization for its further development.


Assuntos
Alérgenos , Hipersensibilidade Alimentar , Álcool Desidrogenase , Alérgenos/química , Animais , Abelhas , Hipersensibilidade Alimentar/metabolismo , Metabolômica/métodos , Pólen/química , Profilinas/química , Proteômica/métodos
7.
J Nutr Biochem ; 105: 109004, 2022 07.
Artigo em Inglês | MEDLINE | ID: mdl-35351615

RESUMO

Patients with inflammatory bowel diseases tend to show alteration of lipid profiles. It remains unknown whether dietary intake with specific lipids, such as phosphatidylcholine (PC) and sphingomyelin (SM), have distinguishable effects against IBD. Here, a preclinical study using dextran sulphate sodium (DSS)-induced colitis mice model was applied to explore/compare the effects by PC, and SM. Results showed that PC treatment (p.o., 30 mg/kg b.w., 15 d) exerted higher inhibitory activity than the same dosage of SM supplementation on colonic tissue lesions and pro-inflammatory cytokines expressions induced by DSS. Integrative analysis of the metabolome and microbiome indicated that PC and SM supplementation could modulate endogenous tryptophan metabolism, arginine and proline metabolism, purine metabolism, bile secretion, as well as vitamin digestion and absorption, closely correlated with their regulation on the abundance of Lactobacillus, Faecalibacterium, Dubosiella, Turicibacter, and Parasutterella communities in the gut. Based on these data, PC is a more promising candidate for preventing colitis than SM. Our findings provided a scientific foundation for further clinical research to screen more efficient dietary intervention strategy for colitis prevention.


Assuntos
Colite , Microbioma Gastrointestinal , Animais , Colite/metabolismo , Colo/metabolismo , Sulfato de Dextrana/toxicidade , Modelos Animais de Doenças , Humanos , Camundongos , Camundongos Endogâmicos C57BL , Fosfatidilcolinas/metabolismo , Esfingomielinas/farmacologia
8.
Sci Total Environ ; 786: 147443, 2021 Sep 10.
Artigo em Inglês | MEDLINE | ID: mdl-33965824

RESUMO

Research evidence suggests that pesticide residues are one of the leading potential causes of the decline in pollinators, especially during vulnerable periods such as foraging in the early springtime. In China, no research quantifies pesticide residues in the nectar and pollen of honey bee colonies during this period or examines the potential risks and toxicity of pesticides to honey bees. Oilseed rape is one of the first and primary bee-attractive plants in most parts of China. Here, we investigated the pesticide residues in the oilseed rape of the years 2017 and 2018 in China. The hazard quotient (HQ) from pollen and nectar and the BeeREX risk assessment were used to evaluate the potential risks of the pesticide residues to honey bees. We detected 48 pesticides in pollen samples and 34 chemicals in nectar samples. The maximum pollen HQ (PHQ) values (contact or oral) ranged from 0.16 to 706,421, and the maximum nectar HQ (NHQ) values (contact or oral) ranged from 0.07 to 185,135. In particular, carbofuran, cyfluthrin, deltamethrin, and fenpropathrin have relatively high PHQ and NHQ values. Our results indicated that further investigation of nearly half of the tested compounds is needed because their PHQ or NHQ values are more than 50. Especially cyfluthrin and carbofuran need advanced tier assessment due to their maximum RQ (risk quotient) values exceeding the level of concern. These results provide valuable guidance for protecting bees and other pollinators in China.


Assuntos
Brassica napus , Inseticidas , Resíduos de Praguicidas , Animais , Abelhas , China , Inseticidas/análise , Resíduos de Praguicidas/análise , Resíduos de Praguicidas/toxicidade , Néctar de Plantas , Pólen/química
9.
J Agric Food Chem ; 69(6): 1877-1887, 2021 Feb 17.
Artigo em Inglês | MEDLINE | ID: mdl-33543617

RESUMO

Bee pollen possesses potential hypoglycemic effects but its inhibitory mechanisms on glucose absorption and transportation in intestinal cells still need to be clarified. Here, we determined the inhibitory effects of bee pollen extract originating from Camellia sinensis L. (BP-Cs) as well as its representative phenolic compounds on glucose uptake and transport through a human intestinal Caco-2 cell monolayer model. It showed that three representative phenolic compounds, including gallic acid (GA), 3-O-[6'-O-(trans-p-coumaroyl)-ß-d-glucopyranosyl]kaempferol (K1), and 3-O-[2',6'-di-O-(trans-p-coumaroyl)-ß-d-glucopyranosyl]kaempferol (K2), with contents of 27.7 ± 0.86, 9.88 ± 0.54, and 7.83 ± 0.46 µg/mg in BP-Cs extract, respectively, exerted mutual antagonistic actions interacting with glucose transporters to inhibit glucose uptake and transport based on their combination index (CI) and molecular docking analysis. K1, K2, and GA might compete with d-glucose to form hydrogen bonds with the same active residues including GLU-412, GLY-416, GLN-314, and TRP-420 in GLUT2. These findings provide us a deep understanding of the mechanisms underlying the anti-hyperglycemia by bee pollen, which provide a new sight on dietary intervention strategies against diabetes.


Assuntos
Camellia sinensis , Animais , Abelhas , Células CACO-2 , Glucose , Proteínas Facilitadoras de Transporte de Glucose , Humanos , Simulação de Acoplamento Molecular , Extratos Vegetais/farmacologia , Pólen
10.
Blood ; 137(12): 1603-1614, 2021 03 25.
Artigo em Inglês | MEDLINE | ID: mdl-32967010

RESUMO

The initiation and progression of diffuse large B-cell lymphoma (DLBCL) is governed by genetic and epigenetic aberrations. As the most abundant eukaryotic messenger RNA (mRNA) modification, N6-methyladenosine (m6A) is known to influence various fundamental bioprocesses by regulating the target gene; however, the function of m6A modifications in DLBCL is unclear. PIWI-interacting RNAs (piRNAs) have been indicated to be epigenetic effectors in cancer. Here, we show that high expression of piRNA-30473 supports the aggressive phenotype of DLBCL, and piRNA-30473 depletion decreases proliferation and induces cell cycle arrest in DLBCL cells. In xenograft DLBCL models, piRNA-30473 inhibition reduces tumor growth. Moreover, piRNA-30473 is significantly associated with overall survival in a univariate analysis and is statistically significant after adjusting for the National Comprehensive Cancer Network-International Prognostic Index in the multivariate analysis. Additional studies demonstrate that piRNA-30473 exerts its oncogenic role through a mechanism involving the upregulation of WTAP, an m6A mRNA methylase, and thus enhances the global m6A level. Integrating transcriptome and m6A-sequencing analyses reveals that WTAP increases the expression of its critical target gene, hexokinase 2 (HK2), by enhancing the HK2 m6A level, thereby promoting the progression of DLBCL. Together, the piRNA-30473/WTAP/HK2 axis contributes to tumorigenesis by regulating m6A RNA methylation in DLBCL. Furthermore, by comprehensively analyzing our clinical data and data sets, we discover that the m6A regulatory genes piRNA-30473 and WTAP improve survival prediction in DLBCL patients. Our study highlights the functional importance of the m6A modification in DLBCL and might assist in the development of a prognostic stratification and therapeutic approach for DLBCL.


Assuntos
Carcinogênese/genética , Regulação Neoplásica da Expressão Gênica , Linfoma Difuso de Grandes Células B/genética , RNA Interferente Pequeno/genética , Epigênese Genética , Humanos , Linfoma Difuso de Grandes Células B/diagnóstico , Metiltransferases/genética , Prognóstico , RNA Mensageiro/genética
11.
J Agric Food Chem ; 68(3): 907-917, 2020 Jan 22.
Artigo em Inglês | MEDLINE | ID: mdl-31842537

RESUMO

Bee pollen (BP) shows profound gut-protecting potentials. BP lipids (BPLs) mainly composed by phospholipids and polyunsaturated fatty acids might be one of the important contributors, while how BPL exerts gut-protecting effects and is transported through intestinal cell monolayers need to be investigated. Here, we exploited a strategy that combines an UPLC-Q-exactive orbitrap/MS-based lipidomics approach with a human intestinal cell (Caco-2) monolayer transport model, to determine the transepithelial transportation of BPL from Camellia sinensis L. (BPL-Cs), in pathological conditions. The results showed that BPL-Cs protected Caco-2 cells against dextran sulfate sodium (DSS)-induced intestinal barrier dysfunction by improving cell viability, maintaining membrane integrity, increasing tight junctions (ZO-1 and Claudin-1), and eliciting the expressions of antioxidative-related genes (NQO1, Nrf2, Txnrd1, and GSTA1). Lipidomics analysis revealed that DSS suppressed the transport and uptake of most of BPL-Cs including glycerophospholipids, sphingomyelins, and glycosylsphingolipids. Pretreatment with BPL-Cs significantly regulated glycerophospholipid and sphingolipid metabolisms, potentially involved in building permeability barriers and alleviating intestinal oxidative stress. Finally, eight classes of lipids were identified as the potential biomarkers for evaluating DSS-induced Caco-2 cell dysfunctions and BPL-intervened modulation. These findings shed light on the development of BPL as gastrointestinal protective food supplements in the future.


Assuntos
Células Epiteliais/metabolismo , Mucosa Intestinal/metabolismo , Metabolismo dos Lipídeos , Pólen/metabolismo , Animais , Abelhas , Transporte Biológico , Células CACO-2 , Camellia sinensis/química , Claudina-1/genética , Claudina-1/metabolismo , Glutationa Transferase/genética , Glutationa Transferase/metabolismo , Humanos , Lipídeos/química , Fator 2 Relacionado a NF-E2/genética , Fator 2 Relacionado a NF-E2/metabolismo , Pólen/química
12.
Biomed Pharmacother ; 117: 109200, 2019 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-31387194

RESUMO

Bee pollen (BP) is a natural medicine from the hive with various potential health-promoting benefits, but until now there is no study to determine its protective roles in inflammatory bowel disease (IBD). The aim of this study was to reveal the in vitro gastrointestinal protective effects of BP against IBD using molecular and metabolic methods. Dextran sulfate sodium (DSS) challenged Caco-2 cell monolayers were applied to mimic intestinal epithelial cell dysfunctions and metabolic disorders. The pretreatment with BP extract rich in polyphenols ameliorated DSS-induced cell viability losses. It also exerted protective effects against intestinal barrier impairment by strengthening epithelial integrity and tight junction losses induced by DSS. BP up-regulated anti-oxidant (NQO1, Txnrd1, Nrf2) and down-regulated inflammatory (TNF-α and IL-6) mRNA expressions, in accompany with MAPK signaling inhibition. Furthermore, metabolomics analysis based on UPLC-Q-TOF/MS revealed that BP, and DSS treated Caco-2 cells have different metabolomic profiles, with significant changes on key metabolites involved in glycerophospholipid metabolism. Our results showed that BP has great therapeutic potential throughout the early stages of DSS-induced colitis.


Assuntos
Abelhas/química , Produtos Biológicos/farmacologia , Gastroenteropatias/tratamento farmacológico , Intestinos/efeitos dos fármacos , Pólen/química , Substâncias Protetoras/farmacologia , Animais , Células CACO-2 , Linhagem Celular Tumoral , Sulfato de Dextrana/farmacologia , Células Epiteliais/efeitos dos fármacos , Células Epiteliais/metabolismo , Gastroenteropatias/induzido quimicamente , Gastroenteropatias/metabolismo , Humanos , Inflamação/induzido quimicamente , Inflamação/tratamento farmacológico , Polifenóis/farmacologia , RNA Mensageiro/metabolismo , Transdução de Sinais/efeitos dos fármacos , Junções Íntimas/efeitos dos fármacos , Regulação para Cima/efeitos dos fármacos
13.
J Agric Food Chem ; 67(28): 7855-7868, 2019 Jul 17.
Artigo em Inglês | MEDLINE | ID: mdl-31274310

RESUMO

Bee pollen (BP) collected from different floras possesses various potential bioactivities, but the mechanism-related research on anti-inflammatory effects is limited. Here, three types of BP originating from Camellia sinensis L. (BP-Cs), Nelumbo nucifera Gaertn. (BP-Nn), and Brassica campestris L. (BP-Bc) were assessed using molecular and metabolomics methods to determine their anti-inflammatory effects. The differences in polyphenolic abundance of three types of BP extracts were determined by HPLC-DAD/Q-TOF-MS. In vitro anti-inflammatory effects of three BP extracts were evaluated in a lipopolysaccharide (LPS)-induced RAW 264.7 cells model. BP-Cs extract with the most abundant polyphenols was found to be the most effective in reducing inflammation by downregulating inflammatory-related genes expression and blocking the activation of MAPK and NF-κB signaling pathways. Polyphenol-rich BP-Cs was further evaluated for their in vivo anti-inflammatory effect in a LPS-induced acute lung injury mouse model. An UPLC-Q-TOF/MS-based metabolomics approach was applied to analyze metabolite changes in mouse serum. Weshowed that the pretreated BP-Cs extract alleviated inflammation and regulated glycerophospholipid metabolism significantly. Our findings provide a foundation for developing and justifying BP as a potential anti-inflammatory ingredient in functional foods or nutraceutical formulations.


Assuntos
Lesão Pulmonar Aguda/tratamento farmacológico , Anti-Inflamatórios/administração & dosagem , Extratos Vegetais/administração & dosagem , Pólen/química , Lesão Pulmonar Aguda/genética , Lesão Pulmonar Aguda/imunologia , Animais , Anti-Inflamatórios/química , Abelhas , Brassica/química , Camellia sinensis/química , Cromatografia Líquida de Alta Pressão , Humanos , Lipopolissacarídeos/efeitos adversos , Macrófagos/efeitos dos fármacos , Macrófagos/imunologia , Masculino , Espectrometria de Massas , Camundongos , Camundongos Endogâmicos ICR , Quinases de Proteína Quinase Ativadas por Mitógeno/genética , Quinases de Proteína Quinase Ativadas por Mitógeno/imunologia , NF-kappa B/genética , NF-kappa B/imunologia , Nelumbo/química , Extratos Vegetais/química , Polifenóis/administração & dosagem , Polifenóis/química , Células RAW 264.7
14.
Food Funct ; 10(7): 3828-3838, 2019 Jul 17.
Artigo em Inglês | MEDLINE | ID: mdl-31187840

RESUMO

Honeys produced from medicinal plants hold great promise for human health. Herein, we determined the chemical composition and gastrointestinal protective effects of a novel monofloral honey from Prunella vulgaris (PVH). The physicochemical parameters (moisture, sugars, pH, protein content, diastase activity, and hydroxymethylfurfural) of the PVH samples met the criteria specified in European Union regulations and Chinese National Standards. Fifteen phenolic compounds were identified and quantified via high-performance liquid chromatography with a diode array detector and with time of flight tandem mass spectrometry detection (HPLC-DAD/Q-TOF-MS). Rosmarinic acid was found to be a potential marker for PVH identification. Using a dextran sulfate sodium (DSS)-induced acute colitis model, we demonstrated that the administration of PVH (5 g per kg b.w., p.o.) significantly decreased the disease activity index and mitigated colonic histopathological changes in rats. PVH also modulated the gut microbiota composition in the colitic rats, reversing the increase in the Bacteroidetes/Firmicutes ratio and restoring Lactobacillus spp. populations in DSS-challenged rats. The results of this study provide fundamental data on PVH, supporting its future application in the prevention of colitis.


Assuntos
Colite Ulcerativa/prevenção & controle , Sulfato de Dextrana/efeitos adversos , Microbioma Gastrointestinal/efeitos dos fármacos , Mel , Plantas Medicinais , Prunella/química , Animais , Bacteroidetes , Colite Ulcerativa/induzido quimicamente , Colo/metabolismo , Colo/patologia , Modelos Animais de Doenças , Firmicutes , Flores/química , Lactobacillus , Masculino , Ratos , Ratos Sprague-Dawley
15.
Molecules ; 23(2)2018 Feb 08.
Artigo em Inglês | MEDLINE | ID: mdl-29419760

RESUMO

Mistletoes are used medicinally in order to treat various human illnesses. Few studies have reported on the phenolic content and antioxidant properties of Chinese mistletoes (CMs). In this work, the total phenolic content (TPC), total flavonoid content (TFC), and antioxidant activities of soluble and insoluble-bound phenolic extracts from CMs hosted by Camellia assamica (Mast.) Chang (CMC) and Pyrus, i, f. (CMP) were compared. Phenolic compounds in CMC and CMP were identified and quantified using high-performance liquid chromatography (HPLC). The results indicated that the TPC of soluble phenolic extracts was higher than insoluble-bound phenolic counterparts in both CMC and CMP. In addition, the TPC of soluble, insoluble-bound and total phenolic fractions (9.91 ± 0.23, 4.59 ± 0.27 and 14.50 ± 0.35 µmol ferulic acid equivalents per gram (FAE/g) dry sample) extracted from CMP were higher than those extracted from CMC. The soluble phenolic extracts in CMP showed higher antioxidant activities than those in CMC. Eighteen phenolic compounds from soluble and insoluble-bound phenolic extracts from the CMs were identified and quantified by HPLC. This study indicates that CMC and CMP, especially the latter, could be sources of antioxidants in human health care.


Assuntos
Antioxidantes/química , Antioxidantes/farmacologia , Medicamentos de Ervas Chinesas/química , Medicamentos de Ervas Chinesas/farmacologia , Erva-de-Passarinho/química , Fenóis/química , Fenóis/farmacologia , Cromatografia Líquida de Alta Pressão , Compostos Fitoquímicos/química , Solubilidade
16.
J Agric Food Chem ; 65(32): 6848-6860, 2017 Aug 16.
Artigo em Inglês | MEDLINE | ID: mdl-28737913

RESUMO

Bee pollen (BP) is collected by honeybees from flower pollen mixed with nectar and its secretions with extensive nutritional and therapeutic properties. Lipids are known to be critical contributors for the therapeutic effects of BP and vary depending on different plant sources; however, lipid profiles of BP are not available. Here, an UPLC-Q-Exactive Orbitrap/MS method was established for comprehensive lipidomics analysis of BP derived from three major nectar plants (Brassica campestris L., Camellia sinensis L., and Nelumbo nucifera Gaertn.). A total of nine lipid classes, including phosphatidylcholine (41 species), phosphatidylethanolamine (43 species), phosphatidylglycerol (9 species), phosphatidylserine (10 species), lysophosphatidylcholine (12 species), ceramide (8 species), diglyceride (27 species), triglyceride (137 species), and fatty acids (47 species), were first identified and quantified in the three BPs. In vitro anti-inflammatory activity was also discovered in the lipid extracts of three BPs, which has potential relevance to the abundance of phospholipids and unsaturated fatty acids in BP. Our comprehensive lipidomics profiling and in vitro anti-inflammatory properties of BP provide evidence for its future application.


Assuntos
Anti-Inflamatórios/química , Anti-Inflamatórios/farmacologia , Lipídeos/química , Lipídeos/farmacologia , Pólen/química , Animais , Abelhas , Cromatografia Líquida de Alta Pressão , Interleucina-10/genética , Interleucina-10/imunologia , Interleucina-6/genética , Interleucina-6/imunologia , Macrófagos/efeitos dos fármacos , Macrófagos/imunologia , Espectrometria de Massas , Camundongos , Células RAW 264.7
17.
Food Funct ; 6(7): 2339-49, 2015 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-26084988

RESUMO

Fourteen vitex honeys from China were investigated to evaluate its antioxidant and hepatoprotective activity against paracetamol-induced liver damage. All honey samples exhibited high total phenolic content (344-520 mg GAE per kg), total flavonoid content (19-31 mg Rutin per kg), and strong antioxidant activity in DPPH radical scavenging, ferric reducing antioxidant power and Ferrous ion-chelating ability. Nine phenolic acids were detected in vitex honey samples, in which caffeic acid was the main compound. Honey from Heibei Zanhuang (S2) ranked the highest antioxidant activity was orally administered to mice (5 g kg(-1), 20 g kg(-1)) for 70 days. In high-dose (20 g kg(-1)), vitex honey pretreatment resulting in significant increase in serum oxygen radical absorbance capacity (15.07%) and decrease in Cu(2+)-mediate lipoprotein oxidation (80.07%), and suppression in alanine aminotransferase (75.79%) and aspartate aminotransferase (74.52%), enhancement in the superoxide dismutase and glutathione peroxidase activities and reduction in malondialdehyde (36.15%) and 8-hydroxy-2'-deoxyguanosine (19.6%) formation compared with paracetamol-intoxicated group. The results demonstrated the hepatoprotection of vitex honey against paracetamol-induced liver damage might attribute to its antioxidant and/or perhaps pro-oxidative property.


Assuntos
Antioxidantes/administração & dosagem , Doença Hepática Induzida por Substâncias e Drogas/tratamento farmacológico , Mel/análise , Substâncias Protetoras/administração & dosagem , Vitex/química , Acetaminofen/efeitos adversos , Animais , Aspartato Aminotransferases/metabolismo , Doença Hepática Induzida por Substâncias e Drogas/enzimologia , Doença Hepática Induzida por Substâncias e Drogas/metabolismo , China , Glutationa Peroxidase/metabolismo , Humanos , Fígado/enzimologia , Fígado/metabolismo , Masculino , Malondialdeído/metabolismo , Camundongos , Superóxido Dismutase/metabolismo
18.
Cancer Lett ; 329(2): 228-35, 2013 Feb 28.
Artigo em Inglês | MEDLINE | ID: mdl-23178452

RESUMO

Pancreatic ductal adenocarcinoma (PDAC) is among the most lethal human malignancies and is regulated by Sonic Hedgehog (Shh) signaling. Recently, MAP3K10 has been shown to regulate Shh signaling, suggesting a role for MAP3K10 in the tumorigenesis of PDAC. We determined the expression status of MAP3K10 in PDAC tissues and cell lines, and analyzed the viability and cell proliferation of PDAC cells with an overexpression or knockdown of MAP3K10 in vitro. MAP3K10 was upregulated in PDAC tissues and cell lines. Overexpression of MAP3K10 promoted the proliferation and decreased the gemcitabine sensitivity of pancreatic cancer cells. In contrast, knockdown of MAP3K10 significantly decreased cell proliferation and sensitized cells to gemcitabine. However, neither overexpression nor knockdown of MAP3K10 affected cell migration. Moreover, overexpression of MAP3K10 resulted in upregulation of Gli-1 and Gli-2 in PDAC cells. Our results indicate a novel and important role for MAP3K10 in the proliferation and chemoresistance of PDAC. Our study suggests that targeting MAP3K10 is a potential strategy for the development of alternative therapies for pancreatic cancers.


Assuntos
Antimetabólitos Antineoplásicos/farmacologia , Carcinoma Ductal Pancreático/enzimologia , Desoxicitidina/análogos & derivados , Fatores de Transcrição Kruppel-Like/genética , MAP Quinase Quinase Quinases/metabolismo , Proteínas Nucleares/genética , Neoplasias Pancreáticas/enzimologia , Fatores de Transcrição/genética , Apoptose/efeitos dos fármacos , Carcinoma Ductal Pancreático/tratamento farmacológico , Carcinoma Ductal Pancreático/patologia , Linhagem Celular Tumoral/efeitos dos fármacos , Movimento Celular , Proliferação de Células , Sobrevivência Celular/efeitos dos fármacos , Desoxicitidina/farmacologia , Resistencia a Medicamentos Antineoplásicos , Expressão Gênica/efeitos dos fármacos , Humanos , Fatores de Transcrição Kruppel-Like/metabolismo , MAP Quinase Quinase Quinases/genética , Proteínas Nucleares/metabolismo , Neoplasias Pancreáticas/tratamento farmacológico , Neoplasias Pancreáticas/patologia , Fatores de Transcrição/metabolismo , Regulação para Cima/efeitos dos fármacos , Proteína GLI1 em Dedos de Zinco , Proteína Gli2 com Dedos de Zinco , Gencitabina
19.
Food Chem ; 133(2): 573-8, 2012 Jul 15.
Artigo em Inglês | MEDLINE | ID: mdl-25683435

RESUMO

A method for the determination of coenzyme Q10 in bee pollen has been developed applying an online cleanup of accelerated solvent extraction and using environmentally acceptable organic solvents. The extracted samples were analysed by high performance liquid chromatography with diode array detection. The optimised method employed 10 mL extraction cells, 1g sample size, absolute ethanol as extraction solvent, 80°C of extraction temperature, one extraction cycle, 5 min of static time, Cleanert Alumina-N as sorbent and 60% flush volume. The method was validated by means of an evaluation of the matrix effects, linearity, limit of detection (LOD) and quantification (LOQ), trueness, precision and stability. The assay was linear over the concentration range of 0.25-200mg/L and the LOD and LOQ were 0.16 and 0.35 mg/kg, respectively. The recoveries were above 90%. The inter- and intra-day precision was below 6.3%. The method has been successfully applied to the analysis of bee pollen samples. For 20 bee pollen products, the coenzyme Q10 content varied from not detectable to 192.8 mg/kg.


Assuntos
Automação/métodos , Cromatografia Líquida de Alta Pressão/métodos , Pólen/química , Ubiquinona/análogos & derivados , Animais , Abelhas , Fracionamento Químico , Limite de Detecção , Ubiquinona/análise
20.
Plant Cell Rep ; 29(12): 1325-37, 2010 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-20842365

RESUMO

Snow lotus is commonly used as a medicinal plant and has great pharmacological value. To protect these endangered plants, in vitro propagation and cell cultures have been established in order to meet the growing market demand. The phenolic composition, antioxidant activities, total phenolic content (TPC) and total flavonoid content (TFC) from three most commonly used species, in vitro propagated lines and the cell cultures were investigated to qualify their pharmacological value. Quantitative analysis showed that the phenolics varied greatly among different species and the same species at different habitats. From this it can be inferred that the phenolics were influenced by genetic background and the environmental conditions. Significant correlations were observed between the antioxidant activity and several phenolics/TPC/TFC, suggesting that the phenolics are a major contributor of the antioxidant activity and are important for quality evaluation of snow lotus. Based on the abundance of phenolics, TPC, TFC and antioxidant activity, the order of the quality for wild species would be Saussurea involucrata > Saussurea medusa > Saussurea gossypiphora. For S. medusa, its quality judged by origin would be Shigatse > Lhasa > Nagqu. For in vitro propagated plants, the matured plants could be a reliable substitute for wild plants, and the dynamics of phenolics is critical for quality control of this monocarpic species. We provide the first report of quality comparison between the wild plants and the cell cultures. The advantages of developing cell cultures as alternatives for plants collected from the wild are discussed.


Assuntos
Antioxidantes/isolamento & purificação , Saussurea/química , Antioxidantes/química , Antioxidantes/farmacologia , Linhagem Celular , Cromatografia Líquida , Fenóis/química , Fenóis/isolamento & purificação , Fenóis/farmacologia , Espectrofotometria Ultravioleta
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