Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 64
Filtrar
Mais filtros










Base de dados
Intervalo de ano de publicação
1.
Molecules ; 27(9)2022 May 05.
Artigo em Inglês | MEDLINE | ID: mdl-35566310

RESUMO

Daylily is a valuable plant resource with various health benefits. Its main bioactive components are phenolic compounds. In this work, four extraction methods, ultrasonic-assisted water extraction (UW), ultrasonic-assisted ethanol extraction (UE), enzymatic-assisted water extraction (EW), and enzymatic-assisted ethanol extraction (EE), were applied to extract phenolic compounds from daylily. Among the four extracts, the UE extract exhibited the highest total phenolic content (130.05 mg/100 g DW) and the best antioxidant activity. For the UE extract, the DPPH value was 7.75 mg Trolox/g DW, the FRAP value was 14.54 mg Trolox/g DW, and the ABTS value was 15.37 mg Trolox/g DW. A total of 26 phenolic compounds were identified from the four extracts, and the UE extract exhibited a higher abundance range of phenolic compounds than the other three extracts. After multivariate statistical analysis, six differential compounds were selected and quantified, and the UE extract exhibited the highest contents of all six differential compounds. The results provided theoretical support for the extraction of phenolic compounds from daylily and the application of daylily as a functional food.


Assuntos
Hemerocallis , Antioxidantes/química , Etanol , Hemerocallis/química , Fenóis/química , Extratos Vegetais/química , Água
2.
Molecules ; 27(9)2022 May 03.
Artigo em Inglês | MEDLINE | ID: mdl-35566266

RESUMO

Hemerocallis fulva is a medical and edible plant. In this study, we optimized the ultrasound-assisted extraction (UAE) process of extracting flavonoids from Hemerocallis fulva leaves by single-factor experiments and response surface methodology (RSM). The optimum extraction conditions generating the maximal total flavonoids content was as follows: 70.6% ethanol concentration; 43.9:1 mL/g solvent to sample ratio; 61.7 °C extraction temperature. Under the optimized extraction conditions, the total flavonoid content (TFC) in eight Hemerocallis fulva varieties were determined, and H. fulva (L.) L. var. kwanso Regel had the highest TFC. The cytotoxicity of the extract was studied using the Cell Counting Kit-8 (CCK-8 assay). When the concentration was less than 1.25 mg/mL, the extract had no significant cytotoxicity to HaCaT cells. The antioxidant activity was measured via chemical antioxidant activity methods in vitro and via cellular antioxidant activity methods. The results indicated that the extract had a strong ABTS and •OH radical scavenging activity. Additionally, the extract had an excellent protective effect against H2O2-induced oxidative damage at a concentration of 1.25 mg/mL, which could effectively reduce the level of ROS to 106.681 ± 9.733% (p < 0.001), compared with the 163.995 ± 6.308% of the H2O2 group. We identified five flavonoids in the extracts using high-performance liquid chromatography (HPLC). Infrared spectroscopy indicated that the extract contained the structure of flavonoids. The results showed that the extract of Hemerocallis fulva leaves had excellent biocompatibility and antioxidant activity, and could be used as a cheap and potential source of antioxidants in the food, cosmetics, and medicine industries.


Assuntos
Hemerocallis , Antioxidantes/química , Flavonoides/química , Hemerocallis/química , Peróxido de Hidrogênio/análise , Extratos Vegetais/química , Folhas de Planta/química
3.
BMC Plant Biol ; 22(1): 211, 2022 Apr 25.
Artigo em Inglês | MEDLINE | ID: mdl-35468723

RESUMO

BACKGROUND: The Sugars Will Eventually be Exported Transporters (SWEETs) are a newly discovered family of sugar transporters whose members exist in a variety of organisms and are highly conserved. SWEETs have been reported to be involved in the growth and development of many plants, but little is known about SWEETs in daylily (Hemerocallis fulva), an important perennial ornamental flower. RESULTS: In this study, 19 daylily SWEETs were identified and named based on their homologous genes in Arabidopsis and rice. Phylogenetic analysis classified these HfSWEETs into four clades (Clades I to IV). The conserved motifs and gene structures showed that the HfSWEETs were very conservative during evolution. Chromosomal localization and synteny analysis found that HfSWEETs were unevenly distributed on 11 chromosomes, and there were five pairs of segmentally duplicated events and one pair of tandem duplication events. The expression patterns of the 19 HfSWEETs showed that the expression patterns of most HfSWEETs in different tissues were related to corresponding clades, and most HfSWEETs were up-regulated under low temperatures. Furthermore, HfSWEET17 was overexpressed in tobacco, and the cold resistance of transgenic plants was much higher than that of wild-type tobacco. CONCLUSION: This study identified the SWEET gene family in daylily at the genome-wide level. Most of the 19 HfSWEETs were expressed differently in different tissues and under low temperatures. Overexpression further suggests that HfSWEET17 participates in daylily low-temperature response. The results of this study provide a basis for further functional analysis of the SWEET family in daylily.


Assuntos
Arabidopsis , Hemerocallis , Arabidopsis/genética , Resposta ao Choque Frio/genética , Flores , Proteínas de Membrana Transportadoras/metabolismo , Filogenia , Proteínas de Plantas/metabolismo
4.
Ann Bot ; 129(4): 429-441, 2022 03 23.
Artigo em Inglês | MEDLINE | ID: mdl-35018412

RESUMO

BACKGROUND AND AIMS: Many angiosperms can secrete both floral (FN) and extrafloral (EFN) nectar. However, much remains unclear about how EFN and FN differ in secretion, composition and ecological function, especially when both FN and EFN are secreted on flowers of the same species. METHODS: Hemerocallis citrina flowers secrete both FN and EFN. The FN and EFN traits including volume, presentation pattern and temporal rhythms of secretion were compared by field observation. Sugar and amino acid contents were analysed using regular biochemical methods, whereas the proteome was investigated by combined gel-based and gel-free approaches. Animal feeders on FN and EFN were investigated by field observation. Hemerocallis citrina plants were exposed by soil drenching to two systemic insecticides, acetamiprid and imidacloprid, and the concentration of these in FN and EFN was measured by ultra-high performance liquid chromatography coupled with mass spectrometry. KEY RESULTS: Hemerocallis citrina FN was concentrated and sucrose dominant, secreted in the mature flower tube and served as a reward for pollinators. Conversely, EFN was hexose rich, more dilute and less rich in sugar and amino acids. EFN was secreted on the outside of developing floral buds, and was likely to attract predatory animals for defence. EFN had fewer phenolics, but more pathogenesis-related components, such as chitinase and glucanase. A significantly different proteomic profile and enzymatic activities between FN and EFN suggest that they had different biosynthesis mechanisms. Both neonicotinoid insecticides examined became present in both nectar types soon after application, but in greater concentration within EFN; EFN also attracted a wider range of insect species than FN. CONCLUSIONS: Hemerocallis citrina FN and EFN differed in production, composition and ecological function. The EFN pathway could be a significant way for neonicotinoids to enter the wild food chain, and must be considered when evaluating the risks to the environment of other systemic insecticides.


Assuntos
Formigas , Hemerocallis , Inseticidas , Animais , Carboidratos , Flores/metabolismo , Hemerocallis/metabolismo , Neonicotinoides , Néctar de Plantas/metabolismo , Proteômica , Açúcares
5.
Nat Prod Res ; 36(5): 1266-1272, 2022 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-33487064

RESUMO

Two new phenanthrenes, Hemecitones A and B, were isolated from Hemerocallis fulva (L.) L. Their structures were determined by UV, IR, HR-ESI-MS, 1D and 2D NMR analysis. The in vitro cytotoxic activities of compounds 1 and 2 were studied against breast carcinoma MDA-MB-231, hepatocellular carcinoma HepG2 and lung carcinoma A549 cell lines. And compounds 1 and 2 exhibited anti-proliferative effects against these least one of the three types of cell lines with IC50 ranging from 12.57 ± 2.34 to 31.22 ± 1.36 µM.[Formula: see text].


Assuntos
Antineoplásicos , Hemerocallis , Fenantrenos , Antineoplásicos/química , Antineoplásicos/farmacologia , Linhagem Celular Tumoral , Hemerocallis/química , Espectroscopia de Ressonância Magnética , Estrutura Molecular , Fenantrenos/química , Fenantrenos/farmacologia
7.
Int J Mol Sci ; 22(21)2021 Nov 05.
Artigo em Inglês | MEDLINE | ID: mdl-34769440

RESUMO

SHORT VEGETATIVE PHASE (SVP) genes are members of the well-known MADS-box gene family that play a key role in regulating vital developmental processes in plants. Hemerocallis are perennial herbs that exhibit continuous flowering development and have been extensively used in landscaping. However, there are few reports on the regulatory mechanism of flowering in Hemerocallis. To better understand the molecular basis of floral formation of Hemerocallis, we identified and characterized the SVP-like gene HkSVP from the Hemerocallis cultivar 'Kanai Sensei'. Quantitative RT-PCR (qRT-PCR) indicated that HkSVP transcript was mainly expressed in the vegetative growth stage and had the highest expression in leaves, low expression in petals, pedicels and fruits, and no expression in pistils. The HkSVP encoded protein was localized in the nucleus of Arabidopsis protoplasts and the nucleus of onion epidermal cells. Yeast two hybrid assay revealed that HKSVP interacted with Hemerocallis AP1 and TFL1. Moreover, overexpression of HkSVP in Arabidopsis resulted in delayed flowering and abnormal phenotypes, including enriched trichomes, increased basal inflorescence branches and inhibition of inflorescence formation. These observations suggest that the HkSVP gene may play an important role in maintaining vegetative growth by participating in the construction of inflorescence structure and the development of flower organs.


Assuntos
Flores/crescimento & desenvolvimento , Hemerocallis/crescimento & desenvolvimento , Proteínas de Domínio MADS/metabolismo , Proteínas de Plantas/metabolismo , Sequência de Aminoácidos , Flores/genética , Flores/metabolismo , Hemerocallis/genética , Hemerocallis/metabolismo , Inflorescência/genética , Inflorescência/crescimento & desenvolvimento , Inflorescência/metabolismo , Proteínas de Domínio MADS/genética , Filogenia , Folhas de Planta/genética , Folhas de Planta/crescimento & desenvolvimento , Folhas de Planta/metabolismo , Proteínas de Plantas/genética , Fatores de Transcrição/genética , Fatores de Transcrição/metabolismo
8.
Plant Sci ; 311: 110992, 2021 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-34482906

RESUMO

Previous studies demonstrated that flower opening time (FOT) is a stable trait and precisely controlled by a circadian clock responsive to the environment. It plays a vital role in improving fertility. Hemerocallis spp. has different FOTs divided into two types: nocturnal and diurnal. To explore the regulatory mechanisms of their FOTs, we carried out a transcriptome sequencing experiment at different developmental stages of an F1 population with different FOTs. 55,883 unigenes were obtained, and 9234 differential genes were identified. Co-expression was analyzed by K-means clustering and weighted gene co-expression network analysis. Results showed that after entering reproductive growth, two FOT types of Hemerocallis had increased expression of genes related to photosynthetic metabolism and sensitivity to environmental response such as light and hormone signal transmission. Circadian rhythm-related activities were enriched in hub genes during the flowering stage. Genes showing differential expression between the two Hemerocallis groups were related to environmental response and photosynthesis pathways. Putative circadian clock genes displayed differences in expression across the flower opening stage in both groups of Hemerocallis. Twenty-three key circadian clock genes were identified, which related to sensitivity to light signal input and gating. These genes might closely relate to FOTs in Hemerocallis.


Assuntos
Relógios Circadianos/genética , Relógios Circadianos/fisiologia , Ritmo Circadiano/genética , Ritmo Circadiano/fisiologia , Flores/crescimento & desenvolvimento , Hemerocallis/genética , Hemerocallis/fisiologia , Adaptação Ocular , Escuridão , Flores/genética , Regulação da Expressão Gênica de Plantas , Fatores de Tempo
9.
Mol Phylogenet Evol ; 164: 107264, 2021 11.
Artigo em Inglês | MEDLINE | ID: mdl-34273506

RESUMO

The perennial herb genus Hemerocallis (Asphodelaceae) shows four flowering types: diurnal half-day, diurnal one-day, nocturnal half-day, and nocturnal one-day flowering. These flowering types are corresponding to their main pollinators, and probably act as a primary mechanism of reproductive isolation. To examine how the four flowering types diverged, we reconstructed the phylogeny of the Japanese species of Hemerocallis using 1615 loci of nuclear genome-wide SNPs and 2078 bp sequences of four cpDNA regions. We also examined interspecific gene flows among taxa by an Isolation-with-Migration model and a population structure analysis. Our study revealed an inconsistency between chloroplast and nuclear genome phylogenies, which may have resulted from chloroplast capture. Each of the following five clusters is monophyletic and clearly separated on the nuclear genome-wide phylogenetic tree: (I) two nocturnal flowering species with lemon-yellow flowers, H. citrina (half-day flowering) and H. lilioasphodelus (one-day flowering); (II) a diurnal one-day flowering species with yellow-orange flowers, H. middendorffii; (III) a variety of a diurnal half-day flowering species with reddish orange flowers, H. fulva var. disticha; (IV) another variety of a diurnal half-day flowering species with reddish orange flowers, H. fulva var. aurantiaca, and a diurnal one-day flowering species with yellow-orange flowers, H. major; (V) a diurnal half-day flowering species with yellow-orange flowers, H. hakuunensis. The five clusters are consistent with traditional phenotype-based taxonomy (cluster I, cluster II, and clusters III-V correspond to Hemerocallis sect. Hemerocallis, Capitatae, and Fulvae, respectively). These findings could indicate that three flowering types (nocturnal flowering, diurnal one-day flowering, and diurnal half-day flowering) diverged in early evolutionary stages of Hemerocallis and subsequently a change from diurnal half-day flowering to diurnal one-day flowering occurred in a lineage of H. major. While genetic differentiation among the five clusters was well maintained, significant gene flow was detected between most pairs of taxa, suggesting that repeated hybridization played a role in the evolution of those taxa.


Assuntos
Hemerocallis , Cloroplastos , Flores/genética , Fluxo Gênico , Hemerocallis/genética , Japão , Filogenia
10.
J Food Sci ; 86(7): 3082-3096, 2021 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-34146417

RESUMO

The present study discussed the optimization of the ultrasonic-assisted extraction of polysaccharides from daylily polysaccharides (DPs). The extracted crude polysaccharides were further separated and purified, and the antioxidant activities including 1,1-diphenyl-2-111 picrylhydrazyl (DPPH) radical scavenging, 2,2'-azinobis-(3-ethylbenzthiazoline-6-sulphonate) (ABTS) radical scavenging, hydroxyl radical scavenging, and ferric-reducing antioxidant power (FRAP) activities of the obtained fractions were also evaluated. The results showed that the optimal ultrasonic-assisted extraction parameters with DPs yield of 15.25 ± 1.13% were water to powder ratio of 25 ml/g, extraction power of 694 W, extraction temperature of 71°C, extraction time of 38 min, and three times extraction. By DEAE Sepharose Fast Flow column, four water-soluble polysaccharide fractions (DP-1, DP-2, DP-3, and DP-4) were successfully obtained. Monosaccharide component analysis showed that the four obtained fractions were all hetero-polysaccharides that mainly contained rhamnose, arabinose, fructose, galactose, glucose, galacturonic acid, and glucuronic acid in different molar ratios. All the four DP fractions did show obvious antioxidant activities in vitro, and the DP-3 component had relatively high ABTS free radical scavenging activity. Overall, our research showed that DPs could provide cheap raw materials for the development of natural antioxidants in medicines, functional foods, and even cosmetics. PRACTICAL APPLICATION: This article deals with the optimization of the ultrasonic-assisted extraction of polysaccharides from daylily and its antioxidant activities. The results showed that the optimal ultrasonic-assisted extraction yield of DPs was 15.25 ± 1.13%. By DEAE Sepharose Fast Flow column, four water-soluble polysaccharide fractions were successfully obtained, and all the four DP fractions did show obvious antioxidant activities in vitro. Daylily polysaccharides could provide cheap raw materials for the development of natural antioxidants in medicines, functional foods, and even cosmetics.


Assuntos
Antioxidantes/farmacologia , Hemerocallis/química , Polissacarídeos/isolamento & purificação , Polissacarídeos/farmacologia , Ultrassom/métodos , Antioxidantes/química , Hemerocallis/efeitos da radiação , Polissacarídeos/química
11.
J Pharm Biomed Anal ; 186: 113314, 2020 Jul 15.
Artigo em Inglês | MEDLINE | ID: mdl-32361472

RESUMO

Hemerocallis citrina Borani is an important crop and its flower buds are widely consumed in East Asian areas as a vegetable, as well as in traditional Chinese medicine, due to its health-promoting properties. Metabolites present in plant-derived foods or medicines are in part responsible for their desirable flavor profiles and health benefits. Nevertheless, detailed information about these compounds in H. citrina is scarce. Therefore, this study aimed to investigate the metabolites by high-performance liquid chromatography/quadrupole time-of-flight mass spectrometry (HPLC-Q-TOF-MS). In this study, a total of 144 compounds, including 14 amides, 25 polyphenols, 44 flavonols, 35 anthraquinones, 15 naphthols, and 11 other components, were detected by the established screening method and were identified by their precise m/z values, characteristic tandem mass spectrometry (MS/MS) data and fragmentation pathways of references, 111 of which were reported in this plant for the first time. The distribution of identified ingredients in different parts of H. citrina was determined. Interestingly, colchicine, which had been reported as a toxic compound in the fresh flower buds in previous studies and various news reports, was not found. This work marks the first comprehensive study of metabolites from commercial flower buds and different parts of H. citrina.


Assuntos
Cromatografia Líquida de Alta Pressão/métodos , Hemerocallis/química , Extratos Vegetais/análise , Espectrometria de Massas/métodos , Extratos Vegetais/química , Extratos Vegetais/metabolismo
12.
Int J Mol Sci ; 21(5)2020 Mar 09.
Artigo em Inglês | MEDLINE | ID: mdl-32182911

RESUMO

The global depression population is showing a significant increase. Hemerocallis fulva L. is a common Traditional Chinese Medicine (TCM). Its flower buds are known to have ability to clear away heat and dampness, detoxify, and relieve depression. Ancient TCM literature shows that its roots have a beneficial effect in calming the spirit and even the temper in order to reduce the feeling of melancholy. Therefore, it is inferred that the root of Hemerocallis fulva L. can be used as a therapeutic medicine for depression. This study aims to uncover the pharmacological mechanism of the antidepressant effect of Hemerocallis Radix (HR) through network pharmacology method. During the analysis, 11 active components were obtained and screened using ADME-absorption, distribution, metabolism, and excretion- method. Furthermore, 267 HR targets and 740 depressive disorder (DD) targets were gathered from various databases. Then protein-protein interaction (PPI) network of HR and DD targets were constructed and cluster analysis was applied to further explore the connection between the targets. In addition, gene ontology (GO) enrichment and pathway analysis was applied to further verify that the biological process related to the target protein is associated with the occurrence of depression disorder. In conclusion, the most important bioactive components-anthraquinone, kaempferol, and vanillic acid-can alleviate depression symptoms by regulating MAOA, MAOB, and ESR1. The proposed network pharmacology strategy provides an integrating method to explore the therapeutic mechanism of multi-component drugs on a systematic level.


Assuntos
Antidepressivos/farmacologia , Depressão/tratamento farmacológico , Transtorno Depressivo/tratamento farmacológico , Medicamentos de Ervas Chinesas/farmacologia , Hemerocallis/química , Ontologia Genética , Humanos , Medicina Tradicional Chinesa/métodos , Mapas de Interação de Proteínas/efeitos dos fármacos
13.
BMC Plant Biol ; 20(1): 31, 2020 Jan 20.
Artigo em Inglês | MEDLINE | ID: mdl-31959097

RESUMO

BACKGROUND: Daylilies are a lucrative crop used for its floral beauty, medicinal proprieties, landscaping, fire prevention, nutritional value, and research. Despite the importance, daylilies remain extremely challenging for multiplying in vitro. The response difficulty is exacerbated because a few good protocols for daylilies micropropagation are generally difficult to reproduce across genotypes. An efficient strategy, currently applied at Langston University, is to systematically explore individual tissues or organs for their potential to micropropagation. This article is a partial report of the investigation carried out under room environmental conditions and focuses on developing an efficient daylilies in vitro propagation protocol that uses the stem tissue as the principal explant. RESULTS: In less than three months, using thidiazuron, the use of the stem tissue as the in vitro experimental explant was successful in inducing multiple shoots several folds greater than current daylilies shoot organogenesis protocols. The study showed that tissue culture can be conducted successfully under unrestricted room environmental conditions as well as under the controlled environment of a growth chamber. It also showed that splitting lengthwise stem explants formed multiple shoots several folds greater than cross-sectioned and inverted explants. Shoot conversion rate was mostly independent of the number of shoots formed per explants. The overall response was explant and genotype-dependent. Efficient responses were observed in all thidiazuron treatments. CONCLUSION: An efficient protocol, which can be applied for mass multiple shoots formation using the daylilies stem tissue as the main explant, was successfully developed. This could lead to a broad and rapid propagation of the crop under an array of environmental conditions to meet the market demand and hasten exogenous gene transfer and breeding selection processes.


Assuntos
Hemerocallis/fisiologia , Compostos de Fenilureia/farmacologia , Reguladores de Crescimento de Plantas/farmacologia , Brotos de Planta/fisiologia , Regeneração , Tiadiazóis/farmacologia , Técnicas de Cultura de Tecidos
14.
PLoS One ; 14(6): e0216460, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31170177

RESUMO

This study collected 183 Hemerocallis varieties to conduct numerical classification of flower color and provide valuable baseline data and foundational theory for normalization and precision of Hemerocallis. The color CIELab phenotypes were collected via colorimeter (CR-10 Plus), which separately measured three sepal and petal parts (throat, eye and limb). The colors of experimental samples were artificially named by the Royal Horticultural Society Colour Chart (RHSCC). All the data were analyzed using R software. The results showed that the throat was predominantly green-yellow, light yellow and yellow; green-yellow accounted for the largest proportion of sepals (67.76%) and petals (69.40%). The eye was more abundant, and there were significant differences between sepals and petals. The limb was clustered into five color groups (orange, yellow, pink, red and purple); the yellow group had the most varieties for both sepals and petals, containing 57.38% and 55.74%, respectively. Both sepals and petals had significant differences (p<0.0001) in color (△E), redness (a*) and color angle (h) for the throat, eye and limb. However, the difference in CIELab phenotypes between the eye and limb were not significant. According to "Dual Classification", the color classification standard was proposed as a 3-level standard. The color of sepal and petal consistency served as the first standard, and the color of limb was the second standard. The color pattern types of pure, gradual change, watermark and eye spot, served as the third standard. It has been proposed that all the 183 experimental varieties were divided into two categories, five groups and finally four types. This study provides a classification basis and reference for numeric and standardized color phenotype description for Hemerocallis.


Assuntos
Flores/metabolismo , Hemerocallis/metabolismo , Pigmentação , Flores/classificação , Fenótipo
15.
Oxid Med Cell Longev ; 2018: 1526125, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-30538798

RESUMO

The main purposes of this study were to screen the antioxidant activities of various fractions of Hemerocallis citrina Baroni and test their hepatoprotective effects in vitro. Antioxidant assays (2,2-diphenyl-1-picrylhydrazyl (DPPH), 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS), and reducing power experiments) and tert-butyl hydroperoxide- (t-BHP-) induced BRL-3A oxidative damage experiments were performed in vitro. The H. citrina ethyl acetate fraction (HCEA) was determined to have strong antioxidant activity because of its high flavonoid and polyphenol content. Ultraperformance liquid chromatography- (UPLC-) photodiode array (PDA)/mass spectrometry (MS) analysis showed that the main components of the HCEA were flavonoids and caffeic acid derivatives. A total of 17 compounds were identified. HCEA also effectively protected the liver against t-BHP-induced oxidative stress injury and significantly reduced reactive oxygen (ROS) accumulation. Moreover, HCEA significantly reduced levels of alanine aminotransferase (ALT), aspartate transaminase (AST), and lactate dehydrogenase (LDH). Further studies have shown that HCEA inhibits t-BHP-induced apoptosis by increasing B-cell lymphoma-2 (BCL-2) activity and decreasing caspase-3 and caspase-9 activity. Moreover, HCEA enhanced the activity of antioxidant enzymes superoxide dismutase (SOD) and catalase (CAT), as well as the total antioxidant capacity (T-AOC), and increased the antioxidant level of glutathione (GSH) in BRL-3A cells. HCEA increased the antioxidant capacity of cells by increasing the gene expression of AMP-activated protein kinase (AMPK), extracellular signal-regulated kinase (ERK), P38, nuclear factor, erythroid 2 like 2 (Nrf2), SOD, glutamate-cysteine ligase catalytic subunit (GCLC), glutamate-cysteine ligase modifier subunit (GCLM), and heme oxygenase 1 (HO-1), which are associated with antioxidant pathways to protect against oxidative stress. In conclusion, HCEA protected BRL-3A cells against t-BHP-induced oxidative stress damage via antioxidant and antiapoptosis pathways. Therefore, H. citrina Baroni may serve as a potential hepatoprotective drug.


Assuntos
Antioxidantes/farmacologia , Hemerocallis , Hepatócitos/efeitos dos fármacos , Estresse Oxidativo/efeitos dos fármacos , Extratos Vegetais/farmacologia , Acetatos/farmacologia , Animais , Antioxidantes/química , Apoptose/efeitos dos fármacos , Linhagem Celular , Hemerocallis/química , Hepatócitos/metabolismo , Peróxido de Hidrogênio/toxicidade , Extratos Vegetais/química , Substâncias Protetoras/farmacologia , Ratos , terc-Butil Hidroperóxido/toxicidade
16.
Planta ; 248(4): 859-873, 2018 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-29943113

RESUMO

MAIN CONCLUSION: Sugar-related metabolic biological processes and metabolic pathways as well as invertase, protease, and ribosomal proteins may be critical regulators controlling the circadian rhythm and ephemeral properties of daylily flowers. Daylily is a familiar perennial flower. The daylily flower opens at dawn and withers away at night. Flower longevity in almost all daylily varieties from opening to fading is less than 24 h. In the past decades, the physiological changes and genetic responses to senescence in daylily flowers have been reported. However, the main metabolic pathways and biological processes involved in daylily flower senescence and the proteins involved in premature senility of daylily flowers are poorly understood. Herein, we identified differences between the proteomes of four developmental stages (s1-s4) of daylily flowers using iTRAQ-based quantitative proteomic methods. A total of 445 proteins (containing at least two unique peptides) were identified, and differentially expressed proteins (upregulation ≥ 1.5 or downregulation ≤ 0.67, P value ≤ 0.05) were detected between these stages in the following numbers: 58 (s2/s1), 59 (s3/s1), 31 (s3/s2), 64 (s4/s1), 52 (s4/s2), and 29 (s4/s3). Protein functions and classifications were analyzed based on GO, KEGG, and COG, and expressive hierarchical cluster analysis and functional enrichment analysis for differentially expressed proteins were carried out. A comparison of the late stages (s3 and s4) with the early stage (s1) revealed that the sugar (hexose, monosaccharide, and glucose) metabolic process GO category was the most enriched, and sugar (galactose, pentose, starch, and sucrose) metabolism pathways constituted the most enriched KEGG category. Finally, the potential research value of invertase, protease, and ribosomal proteins for revealing the mechanism underlying the circadian rhythm and ephemeral properties of daylily flowers are discussed. These data and analyses provide new insight into the senescence mechanism of daylily flowers.


Assuntos
Hemerocallis/metabolismo , Redes e Vias Metabólicas , Proteoma , Proteômica/métodos , Açúcares/metabolismo , Flores/crescimento & desenvolvimento , Flores/metabolismo , Hemerocallis/crescimento & desenvolvimento , Proteínas de Plantas/metabolismo , Fatores de Tempo
17.
J Food Sci ; 83(5): 1463-1469, 2018 May.
Artigo em Inglês | MEDLINE | ID: mdl-29693723

RESUMO

The content of several phenolic acids and flavonoids in aqueous extract (AE) and ethanol extract (EE) of daylily flower (Hemerocallis fulva L.) was analyzed. The effects of AE or EE at 0.5%, 1%, or 2% in HUVE cells against high glucose-induced cell death, oxidative, and inflammatory damage were examined. Results showed that seven phenolic acids and seven flavonoids could be detected in AE or EE, in the range of 29 to 205 and 41 to 273 mg/100 g, respectively. Compared with the control groups, high glucose raised the activity of caspase-3 and caspase-8; suppressed Bcl-2 mRNA expression and increased Bax mRNA expression; and induced HUVE cells apoptosis. The pretreatments from AE or EE at 1% or 2% reduced caspase-3 activity and Bax mRNA expression, and enhanced cell viability. High glucose decreased glutathione content; stimulated the production of reactive oxygen species, interleukin-6, tumor necrosis factor-alpha, and prostaglandin E2 ; raised the activity of cyclooxygenase-2 and nuclear factor kappa B p50/65 binding; and reduced the activity of glutathione peroxidase, glutathione reductase, and catalase in HUVE cells. AE pretreatments at 1% and 2% reversed these changes. These novel findings suggested that daylily flower was rich in phytochemicals, and could be viewed as a potent functional food against diabetes.


Assuntos
Flores/química , Hemerocallis/química , Extratos Vegetais/farmacologia , Substâncias Protetoras/farmacologia , Antioxidantes/análise , Antioxidantes/farmacologia , Apoptose/efeitos dos fármacos , Caspase 3/metabolismo , Caspase 8/metabolismo , Catalase/antagonistas & inibidores , Catalase/metabolismo , Sobrevivência Celular/efeitos dos fármacos , Células Cultivadas , Ciclo-Oxigenase 2/metabolismo , Dinoprostona/metabolismo , Flavonoides/análise , Flavonoides/farmacologia , Glucose/efeitos adversos , Glutationa Peroxidase/antagonistas & inibidores , Glutationa Peroxidase/metabolismo , Glutationa Redutase/antagonistas & inibidores , Glutationa Redutase/metabolismo , Células Endoteliais da Veia Umbilical Humana/efeitos dos fármacos , Humanos , Interleucina-6/metabolismo , NF-kappa B/metabolismo , Extratos Vegetais/análise , Substâncias Protetoras/análise , Espécies Reativas de Oxigênio/metabolismo , Fator de Necrose Tumoral alfa/metabolismo
18.
J Sci Food Agric ; 98(5): 1977-1987, 2018 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-28925545

RESUMO

BACKGROUND: During the postharvest senescence of fruits and vegetables, redox imbalance occurs. Although the release of methane (CH4 ) has been observed for a long time and its antioxidant properties have recently been demonstrated in animals and plants, the corresponding physiological role of CH4 in regulating plant senescence has not yet been elucidated. RESULTS: Our results indicate that the postharvest deterioration of daylily buds during storage is greatly ameliorated by the exogenous application of CH4 , particularly in the inhibition of tissue browning. The results are supported by a decrease in the degree of browning and by the corresponding phenotype, which are correlated with the suppressed polyphenoloxidase activity. CH4 also maintains the re-establishment of redox balance, as indicated by the lower relative leakage rate, lipid peroxidation level, and reactive oxygen species accumulation in daylily buds. Furthermore, the decrease of the unsaturated/saturated fatty acid ratio and energy charge during storage was also attenuated. CONCLUSION: These results clearly suggest that the postharvest treatment with CH4 is an effective means of prolonging the storage life of daylily buds. © 2017 Society of Chemical Industry.


Assuntos
Hemerocallis/efeitos dos fármacos , Metano/farmacologia , Catecol Oxidase/metabolismo , Flores/efeitos dos fármacos , Flores/crescimento & desenvolvimento , Flores/metabolismo , Hemerocallis/crescimento & desenvolvimento , Hemerocallis/metabolismo , Homeostase/efeitos dos fármacos , Peroxidação de Lipídeos , Oxirredução/efeitos dos fármacos , Proteínas de Plantas/metabolismo
19.
Food Res Int ; 102: 493-503, 2017 12.
Artigo em Inglês | MEDLINE | ID: mdl-29195977

RESUMO

Daylily flowers is an important vegetable in eastern Asia, widely used in many dishes. Daylily flowers are usually sold in dried forms in the supermarkets. There are a few method for processing fresh daylily flowers, however, no study has been conducted to analyze the effects of the processing methods in the composition of final products. In the present study, a flow-injection mass spectrometric fingerprinting (FIMS) method in combination with principal component analysis (PCA) was used to differentiate two species of daylily flowers (Mengzi and Chongli) with three different treatments (vacuum freeze drying, solar drying and hot-air drying treatments) for each. The results showed the fast and simple FIMS method could successfully differentiate between species (raw material) and treatments among each species. However, the two species could not be discriminated very well after being processed in hot-air drying treatment. The difference in chemical profiles of species and treatments were discussed.


Assuntos
Dessecação , Flores/química , Manipulação de Alimentos/métodos , Liofilização , Hemerocallis/química , Espectrometria de Massas por Ionização por Electrospray/métodos , Verduras/química , Biomarcadores/análise , Flores/classificação , Hemerocallis/classificação , Temperatura Alta , Análise de Componente Principal , Especificidade da Espécie , Verduras/classificação
20.
Biomed Pharmacother ; 91: 167-173, 2017 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-28460225

RESUMO

Hemerocallis citrina Baroni (Liliaceae), a Liliaceae plant, has been widely used in food and traditional medicine. This study investigated the safety of ethanol extracts from Hemerocallis citrina (HCE) after oral treatment (p.o.) and evaluating the anti-inflammatory mechanism of HCE in a lipopolysaccharide (LPS)-induced depressive-like model. First, in an 8-week experimental procedure, blood and tissue samples collected from mice were used for biochemical and histopathological analysis every two weeks. Neither the body weight nor relative organ weights were affected by HCE administration. Only the total cholesterol levels were decreased by HCE administration. Histopathological analysis showed no significant liver and kidney changes caused by HCE. In addition, in an LPS-induced mouse depressive-like model, HCE significantly reversed the reduction of sucrose preference with LPS. The results also indicated that LPS activated the nuclear factor-κB (NF-κB), inducible nitric oxide synthase (iNOS) and cyclooxygenase-2 (COX-2) expression in the prefrontal cortex. In contrast, these activations were normalized by HCE pretreatment. In summary, our study provided essential evidence for the safety of Hemerocallis citrina in both food and medicine. The results also demonstrated that HCE exhibited antidepressant-like effects that might be related to inhibition of the NF-κB signaling pathway.


Assuntos
Anti-Inflamatórios/toxicidade , Anti-Inflamatórios/uso terapêutico , Depressão/tratamento farmacológico , Hemerocallis/química , Animais , Anti-Inflamatórios/administração & dosagem , Anti-Inflamatórios/farmacologia , Comportamento Animal , Peso Corporal/efeitos dos fármacos , Ciclo-Oxigenase 2/genética , Ciclo-Oxigenase 2/metabolismo , Depressão/patologia , Rim/efeitos dos fármacos , Rim/patologia , Lipopolissacarídeos , Fígado/efeitos dos fármacos , Fígado/patologia , Masculino , Camundongos Endogâmicos ICR , NF-kappa B/metabolismo , Óxido Nítrico Sintase Tipo II/genética , Óxido Nítrico Sintase Tipo II/metabolismo , Tamanho do Órgão/efeitos dos fármacos , Córtex Pré-Frontal/efeitos dos fármacos , Córtex Pré-Frontal/metabolismo
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA
...