1
|
Pan C, Lu M, Ma L, Wu M. A Dual Emission Fluorescence Probe Based on Silicon Nanoparticles and Rhodamine B for Ratiometric Detection of Kaempferol. J Fluoresc 2024:10.1007/s10895-024-03906-3. [PMID: 39186138 DOI: 10.1007/s10895-024-03906-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2024] [Accepted: 08/07/2024] [Indexed: 08/27/2024]
Abstract
In this paper, blue fluorescent silicon nanoparticles (SiNPs) with outstanding optical properties and robust stability were synthesized by a simple one-step hydrothermal method. By introducing red emissive rhodamine B (RhB) into SiNPs solution, a dual emission nanoprobe (SiNPs@RhB) was constructed, which showed excellent pH stability, salt resistance and photobleaching resistance. The SiNPs@RhB probe could emit two peaks at 444 nm and 583 nm under 365 nm excitation. It was found that the fluorescence intensity of the two emission peaks decreased in different degrees with the addition of different concentrations of kaempferol (Kae). According to this phenomenon, a novel ratiometric fluorescence method was established for the detection of Kae via utilizing SiNPs@RhB as nanoprobe. The detection range and limit of detection (LOD) were 0.5 ~ 150 µM and 0.24 µM, respectively. The ratiometric fluorescence method exhibited the superiority of rapid detection, excellent stability, wide linear range and high sensitivity. The detection mechanism was studied by ultraviolet visible absorption spectra, fluorescence spectra and fluorescence lifetime. Furthermore, the method was applied to the detection of Kae in real samples (kaempferia powder, sea buckthorn granules and sea buckthorn dry emulsion).
Collapse
Affiliation(s)
- Congjie Pan
- School of Pharmacy, Henan University of Chinese Medicine, Zhengzhou, 450046, China.
- Henan Engineering Research Center of Modern Chinese Medicine Research, Development and Application, Zhengzhou, 450046, China.
| | - Meicheng Lu
- School of Pharmacy, Henan University of Chinese Medicine, Zhengzhou, 450046, China
| | - Longfei Ma
- Henan Police College, Zhengzhou, 450046, China
| | - Mingxia Wu
- School of Pharmacy, Henan University of Chinese Medicine, Zhengzhou, 450046, China.
| |
Collapse
|
2
|
Mansour FR, Abdallah IA, Bedair A, Hamed M. Analytical Methods for the Determination of Quercetin and Quercetin Glycosides in Pharmaceuticals and Biological Samples. Crit Rev Anal Chem 2023:1-26. [PMID: 37898879 DOI: 10.1080/10408347.2023.2269421] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2023]
Abstract
Flavonoids are plant-derived compounds that have several health benefits, including antioxidative, anti-inflammatory, anti-mutagenic, and anti-carcinogenic effects. Quercetin is a flavonoid that is widely present in various fruits, vegetables, and drinks. Accurate determination of quercetin in different samples is of great importance for its potential health benefits. This review, is an overview of sample preparation and determination methods for quercetin in diverse matrices. Previous research on sample preparation and determination methods for quercetin are summarized, highlighting the advantages and disadvantages of each method and providing insights into recent developments in quercetin sample treatment. Various analytical techniques are discussed including spectroscopic, chromatographic, electrophoretic, and electrochemical methods for the determination of quercetin and its derivatives in different samples. UV-Vis (Ultraviolet-visible) spectrophotometry is simple and inexpensive but lacks selectivity. Chromatographic techniques (HPLC, GC) offer selectivity and sensitivity, while electrophoretic and electrochemical methods provide high resolution and low detection limits, respectively. The aim of this review is to comprehensively explore the determination methods for quercetin and quercetin glycosides in diverse matrices, with emphasis on pharmaceutical and biological samples. The review also provides a theoretical basis for method development and application for the analysis of quercetin and quercetin glycosides in real samples.
Collapse
Affiliation(s)
- Fotouh R Mansour
- Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Tanta University, Tanta 31111, Egypt
| | - Inas A Abdallah
- Department of Analytical Chemistry, Faculty of Pharmacy, University of Sadat City, Sadat City 32897, Monufia, Egypt
| | - Alaa Bedair
- Department of Analytical Chemistry, Faculty of Pharmacy, University of Sadat City, Sadat City 32897, Monufia, Egypt
| | - Mahmoud Hamed
- School of Information Technology and Computer Science (ITCS), Nile University, Giza, Egypt
| |
Collapse
|
3
|
Shao YF, Tang BB, Ding YH, Fang CY, Hong L, Shao CX, Yang ZX, Qiu YP, Wang JC, Yang B, Weng QJ, Wang JJ, He QJ. Kaempferide ameliorates cisplatin-induced nephrotoxicity via inhibiting oxidative stress and inducing autophagy. Acta Pharmacol Sin 2023; 44:1442-1454. [PMID: 36658427 PMCID: PMC10310756 DOI: 10.1038/s41401-023-01051-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Accepted: 01/06/2023] [Indexed: 01/20/2023] Open
Abstract
Acute kidney injury (AKI) caused by anti-tumor drugs, such as cisplatin, is a severe complication with no effective treatment currently, leading to the reduction or discontinuation of chemotherapy. Natural products or herbal medicines are gradually considered as promising agents against cisplatin-induced AKI with the advantages of multi-targeting, multi-effects, and less resistance. In this study, we investigated the effects of kaempferide, a natural flavonoid extracted from the rhizome of Kaempferia galanga, in experimental AKI models in vitro and in vivo. We first conducted pharmacokinetic study in mice and found a relative stable state of kaempferide with a small amount of conversion into kaempferol. We showed that both kaempferide (10 μM) and kaempferol (10 μM) significantly inhibited cisplatin-caused injuries in immortalized proximal tubule epithelial cell line HK-2. In AKI mice induced by injection of a single dose of cisplatin (15 mg/kg), oral administration of kaempferide (50 mg/kg) either before or after cisplatin injection markedly improved renal function, and ameliorated renal tissue damage. We demonstrated that kaempferide inhibited oxidative stress and induced autophagy in cisplatin-treated mice and HK-2 cells, thus increasing tubular cell viability and decreasing immune responses to attenuate the disease progression. In addition, treatment with kaempferide significantly ameliorated ischemia-reperfusion-induced renal injury in vitro and in vivo. We conclude that kaempferide is a promising natural product for treating various AKI. This study has great implications for promotion of its use in healthcare products, and help to break through the limited use of cisplatin in the clinic.
Collapse
Affiliation(s)
- Yan-Fei Shao
- Center for Drug Safety Evaluation and Research; Zhejiang Province Key Laboratory of Anti-Cancer Drug Research, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, 310058, China
- Department of Pharmacy, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou, 310014, China
| | - Bing-Bing Tang
- Center for Drug Safety Evaluation and Research; Zhejiang Province Key Laboratory of Anti-Cancer Drug Research, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Yu-Hui Ding
- Center for Drug Safety Evaluation and Research; Zhejiang Province Key Laboratory of Anti-Cancer Drug Research, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Chun-Yan Fang
- Center for Drug Safety Evaluation and Research; Zhejiang Province Key Laboratory of Anti-Cancer Drug Research, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Ling Hong
- Center for Drug Safety Evaluation and Research; Zhejiang Province Key Laboratory of Anti-Cancer Drug Research, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, 310058, China
- Department of Pharmacy, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou, 310014, China
| | - Chun-Xiao Shao
- Center for Drug Safety Evaluation and Research; Zhejiang Province Key Laboratory of Anti-Cancer Drug Research, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Zhao-Xu Yang
- Center for Drug Safety Evaluation and Research; Zhejiang Province Key Laboratory of Anti-Cancer Drug Research, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Yue-Ping Qiu
- Center for Drug Safety Evaluation and Research; Zhejiang Province Key Laboratory of Anti-Cancer Drug Research, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Jin-Cheng Wang
- Center for Drug Safety Evaluation and Research; Zhejiang Province Key Laboratory of Anti-Cancer Drug Research, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Bo Yang
- Center for Drug Safety Evaluation and Research; Zhejiang Province Key Laboratory of Anti-Cancer Drug Research, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Qin-Jie Weng
- Center for Drug Safety Evaluation and Research; Zhejiang Province Key Laboratory of Anti-Cancer Drug Research, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Jia-Jia Wang
- Center for Drug Safety Evaluation and Research; Zhejiang Province Key Laboratory of Anti-Cancer Drug Research, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, 310058, China.
| | - Qiao-Jun He
- Center for Drug Safety Evaluation and Research; Zhejiang Province Key Laboratory of Anti-Cancer Drug Research, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, 310058, China.
| |
Collapse
|
4
|
Liu JG, Wan JZ, Lin QM, Han GC, Feng XZ, Chen Z. Convenient Heme Nanorod Modified Electrode for Quercetin Sensing by Two Common Electrochemical Methods. MICROMACHINES 2021; 12:1519. [PMID: 34945369 PMCID: PMC8707963 DOI: 10.3390/mi12121519] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Revised: 11/29/2021] [Accepted: 12/05/2021] [Indexed: 01/02/2023]
Abstract
Quercetin (Qu) is one of the most abundant flavonoids in the human diet. High concentrations of Qu can easily cause adverse effects and induce inflammation, joint pain and stiffness. In this study, Heme was used as a sensitive element and deposited and formed nanorods on a glassy carbon electrode (GCE) for the detection of Qu. The Heme/GCE sensor was characterized using scanning electron microscopy (SEM), cyclic voltammetry (CV), differential pulse voltammetry (DPV) and electrochemical impedance spectroscopy (EIS) techniques. Under optimized conditions, the developed sensor presented a linear concentration ranging from 0.1 to 700 μmol·L-1 according to the CV and DPV methods. The detection limit for the sensor was 0.134 μmol·L-1 and its sensitivity was 0.12 μA·μM-1·cm-2, which were obtained from CV analysis. Through DPV analysis we obtained a detection limit of 0.063 μmol·L-1 and a sensitivity of 0.09 μA·μM-1·cm-2. Finally, this sensor was used to detect the Qu concentration in loquat leaf powder extract, with recovery between 98.55-102.89% and total R.S.D. lower than 3.70%. The constructed electrochemical sensor showed good anti-interference, repeatability and stability, indicating that it is also usable for the rapid detection of Qu in actual samples.
Collapse
Affiliation(s)
| | | | | | - Guo-Cheng Han
- School of Life and Environmental Sciences, Guilin University of Electronic Technology, Guilin 541004, China; (J.-G.L.); (J.-Z.W.); (Q.-M.L.)
| | - Xiao-Zhen Feng
- School of Life and Environmental Sciences, Guilin University of Electronic Technology, Guilin 541004, China; (J.-G.L.); (J.-Z.W.); (Q.-M.L.)
| | - Zhencheng Chen
- School of Life and Environmental Sciences, Guilin University of Electronic Technology, Guilin 541004, China; (J.-G.L.); (J.-Z.W.); (Q.-M.L.)
| |
Collapse
|
5
|
Ethnotherapeutic Uses and Phytochemical Composition of Physalis peruviana L.: An Overview. ScientificWorldJournal 2021; 2021:5212348. [PMID: 34671227 PMCID: PMC8523295 DOI: 10.1155/2021/5212348] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2021] [Revised: 09/11/2021] [Accepted: 09/24/2021] [Indexed: 11/17/2022] Open
Abstract
Background Plant-derived medicines are widespread and continue to increase in traditional and modern medicine, especially in developing countries. Physalis peruviana L. is among the most used plants in conventional medication worldwide. This review aimed to highlight the ethnotherapeutic uses and phytochemical status of identified compounds in P. peruviana. Methods Data were collected from Google Scholar, PubMed/Medline, SciFinder, Science Direct, Scopus, the Wiley Online Library, Web of Science, and any other helpful search engine using Physalis peruviana as the primary keyword. Results Some countries, worldwide, use P. peruviana in their traditional medicine system to manage diverse ailments, mainly diseases and gastrointestinal tract disorders (25.33%). Leaf was the mostly used part (49.28%), prepared by decoction (31.58%) and overall administrated orally (53.57%) as the main route of admission. Around 502 phytoconstituents were identified in different plant parts, especially fruit (38.19%) ethanol/ethyl acetate extract. In most cases (36.17%), the solvent of the extract was not specified. Several phytochemical classes were found in the plant, especially terpenes (26.09%) and phenolic compounds (14.94%). Esters were also abundant (11.55%). In the terpenes category, carotenoids were the most abundant (11.15% followed by monoterpenes (8.76%) and diterpenes (3.18%). However, flavonoids (5.17%) followed by cinnamic acid derivatives (3.99%), monophenolic compounds (1.79%), and phenolic acids (1.33 M) are the most reported phenolic compounds. Hexadecanoic acid (palmitic acid) was the most cited (five times). Conclusion P. peruviana plays an essential role in managing diseases in some countries and is rich in chemical compounds, which need to be isolated and investigated pharmacologically before clinical trials.
Collapse
|
6
|
Kaempferol and Kaempferide Attenuate Oleic Acid-Induced Lipid Accumulation and Oxidative Stress in HepG2 Cells. Int J Mol Sci 2021; 22:ijms22168847. [PMID: 34445549 PMCID: PMC8396315 DOI: 10.3390/ijms22168847] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Revised: 08/09/2021] [Accepted: 08/16/2021] [Indexed: 12/12/2022] Open
Abstract
Nonalcoholic fatty liver disease (NAFLD) is one of the most common liver diseases which lacks ideal treatment options. Kaempferol and kaempferide, two natural flavonol compounds isolated from Hippophae rhamnoides L., were reported to exhibit a strong regulatory effect on lipid metabolism, for which the mechanism is largely unknown. In the present study, we investigated the effects of kaempferol and kaempferide on oleic acid (OA)-treated HepG2 cells, a widely used in vitro model of NAFLD. The results indicated an increased accumulation of lipid droplets and triacylglycerol (TG) by OA, which was attenuated by kaempferol and kaempferide (5, 10 and 20 μM). Western blot analysis demonstrated that kaempferol and kaempferide reduced expression of lipogenesis-related proteins, including sterol regulatory element-binding protein 1 (SREBP1), fatty acid synthase (FAS) and stearoyl-CoA desaturase 1 (SCD-1). Expression of peroxisome proliferator-activated receptor γ (PPARγ) and CCAAT enhancer binding proteins β (C/EBPβ), two adipogenic transcription factors, was also decreased by kaempferol and kaempferide treatment. In addition, western blot analysis also demonstrated that kaempferol and kaempferide reduced expression of heme oxygenase-1 (HO-1) and nuclear transcription factor-erythroid 2-related factor 2 (Nrf2). Molecular docking was performed to identify the direct molecular targets of kaempferol and kaempferide, and their binding to SCD-1, a critical regulator in lipid metabolism, was revealed. Taken together, our findings demonstrate that kaempferol and kaempferide could attenuate OA-induced lipid accumulation and oxidative stress in HepG2 cells, which might benefit the treatment of NAFLD.
Collapse
|
7
|
Ren X, Han L, Li Y, Zhao H, Zhang Z, Zhuang Y, Zhong M, Wang Q, Ma W, Wang Y. Isorhamnetin attenuates TNF-α-induced inflammation, proliferation, and migration in human bronchial epithelial cells via MAPK and NF-κB pathways. Anat Rec (Hoboken) 2020; 304:901-913. [PMID: 32865318 DOI: 10.1002/ar.24506] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2020] [Revised: 06/09/2020] [Accepted: 06/19/2020] [Indexed: 12/20/2022]
Abstract
Isorhamnetin has distinct anti-inflammatory activity and inhibits cell proliferation and migration. These effects are also involved in the pathogenesis of asthma. However, the effect of isorhamnetin on bronchial epithelial cells in patients with asthma has not been examined. Cells of human bronchial epithelial cell line BEAS-2B were cultured with isorhamnetin and tumor necrosis factor (TNF)-α. The effects of isorhamnetin on BEAS-2B cell viability were assessed using CCK8 assay. The EdU (5-ethynyl-2'-deoxyuridine) cell proliferation assay was performed to assess cell proliferation. BEAS-2B cell migration was measured using Transwell and wound healing assays. Real-time PCR and enzyme-linked immunosorbent assay were conducted to measure the expression of pro-inflammatory cytokines. Protein expression levels were determined by western blotting. Immunofluorescence was used to detect nuclear translocation of nuclear factor kappa B (NF-κB). We found that isorhamnetin at 20 and 40 μM reduced the proliferation of BEAS-2B cells induced by TNF-α. Isorhamnetin significantly decreased the expression of interleukin (IL)-1β, IL-6, IL-8, and C-X-C motif chemokine ligand 10 in BEAS-2B cells induced by TNF-α. Additionally, 10 μM isorhamnetin effectively reduced cell migration induced by TNF-α. Treatment with isorhamnetin inhibited the phosphorylation of mitogen-activated protein kinase (MAPK) and NF-κB pathways induced by TNF-α. In summary, isorhamnetin inhibited the inflammation, proliferation, and migration of BEAS-2B cells by regulating the MAPK and NF-κB signaling pathways and is a drug candidate for asthma.
Collapse
Affiliation(s)
- Xiaojie Ren
- The First Clinical School, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, China.,Department of Anaesthesiology, The First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, China
| | - Longyin Han
- The First Clinical School, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, China
| | - Yongxing Li
- The First Clinical School, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, China.,Department of Anaesthesiology, The First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, China
| | - Huanyi Zhao
- The First Clinical School, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, China.,Department of Anaesthesiology, The First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, China
| | - Ziyin Zhang
- The First Clinical School, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, China.,Department of Anaesthesiology, The First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, China
| | - Yuerong Zhuang
- The First Clinical School, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, China.,Department of Anaesthesiology, The First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, China
| | - Ming Zhong
- The First Clinical School, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, China.,Department of Anaesthesiology, The First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, China
| | - Qiang Wang
- Department of Encephalology, Yangjiang People's Hospital, Yangjiang, Guangdong, China
| | - Wuhua Ma
- The First Clinical School, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, China.,Department of Anaesthesiology, The First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, China
| | - Yong Wang
- The First Clinical School, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, China.,Department of Anaesthesiology, The First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, China
| |
Collapse
|
8
|
Tian R, Wang H, Xiao Y, Hu P, Du R, Shi X, Wang Z, Xie Y. Fabrication of Nanosuspensions to Improve the Oral Bioavailability of Total Flavones from Hippophae rhamnoides L. and their Comparison with an Inclusion Complex. AAPS PharmSciTech 2020; 21:249. [PMID: 32875458 DOI: 10.1208/s12249-020-01788-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Accepted: 08/12/2020] [Indexed: 01/27/2023] Open
Abstract
The aim of this work was to increase the solubility and oral bioavailability of isorhamnetin, kaempferol, and quercetin in the total flavones of Hippophae rhamnoides L. (TFH) by preparing their nanosuspensions (NSs) and an inclusion complex. Based on the particle size and zeta potential, P407, Soluplus, SDS, PEG-6000, and HP-β-CD were selected as stabilizers. TFH NSs and a TFH/HP-β-CD inclusion complex were prepared, and their morphology, crystallinity, molecular interactions, and cytotoxicity were investigated. Furthermore, the saturation solubility, dissolution, and pharmacokinetics of the three flavonoids in the TFH, TFH NSs, and TFH/HP-β-CD inclusion complex were compared. The five obtained TFH NSs were physically stable, and their particle sizes were all below 200 nm. The solubility and dissolution of the three active components were obviously enhanced by the formation of the TFH NSs and TFH/HP-β-CD inclusion complex. Correspondingly, the oral bioavailability of isorhamnetin, kaempferol, and quercetin increased up to 4.11-, 3.85-, and 6.73-fold, respectively, in the TFH NSs and 2.89-, 3.71-, and 9.51-fold, respectively, in the TFH/HP-β-CD inclusion complexes compared to those in the raw TFH. In brief, both NSs and inclusion complexes can improve the oral bioavailability of the three flavonoids in TFH. Taking the drug loading and the stable ratio of the multiple components into consideration, the NSs is a more promising strategy than the inclusion complex for increasing the oral bioavailability of multiple water-insoluble components in herbal extracts. Graphical abstract.
Collapse
|
9
|
Pérez-Herrera A, Martínez-Gutiérrez GA, León-Martínez FM, Sánchez-Medina MA. The effect of the presence of seeds on the nutraceutical, sensory and rheological properties of Physalis spp. Fruits jam: A comparative analysis. Food Chem 2020; 302:125141. [DOI: 10.1016/j.foodchem.2019.125141] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2018] [Revised: 07/04/2019] [Accepted: 07/05/2019] [Indexed: 10/26/2022]
|
10
|
Park C, Cha HJ, Choi EO, Lee H, Hwang-Bo H, Ji SY, Kim MY, Kim SY, Hong SH, Cheong J, Kim GY, Yun SJ, Hwang HJ, Kim WJ, Choi YH. Isorhamnetin Induces Cell Cycle Arrest and Apoptosis Via Reactive Oxygen Species-Mediated AMP-Activated Protein Kinase Signaling Pathway Activation in Human Bladder Cancer Cells. Cancers (Basel) 2019; 11:cancers11101494. [PMID: 31590241 PMCID: PMC6826535 DOI: 10.3390/cancers11101494] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2019] [Revised: 09/05/2019] [Accepted: 09/05/2019] [Indexed: 12/18/2022] Open
Abstract
Isorhamnetin is an O-methylated flavonol that is predominantly found in the fruits and leaves of various plants, which have been used for traditional herbal remedies. Although several previous studies have reported that this flavonol has diverse health-promoting effects, evidence is still lacking for the underlying molecular mechanism of its anti-cancer efficacy. In this study, we examined the anti-proliferative effect of isorhamnetin on human bladder cancer cells and found that isorhamnetin triggered the gap 2/ mitosis (G2/M) phase cell arrest and apoptosis. Our data showed that isorhamnetin decreased the expression of Wee1 and cyclin B1, but increased the expression of cyclin-dependent kinase (Cdk) inhibitor p21WAF1/CIP1, and increased p21 was bound to Cdk1. In addition, isorhamnetin-induced apoptosis was associated with the increased expression of the Fas/Fas ligand, reduced ratio of B-cell lymphoma 2 (Bcl-2)/Bcl-2 associated X protein (Bax) expression, cytosolic release of cytochrome c, and activation of caspases. Moreover, isorhamnetin inactivated the adenosine 5′-monophosphate-activated protein kinase (AMPK) signaling pathway by diminishing the adenosine triphosphate (ATP) production due to impaired mitochondrial function. Furthermore, isorhamnetin stimulated production of intracellular reactive oxygen species (ROS); however, the interruption of ROS generation using a ROS scavenger led to an escape from isorhamnetin-mediated G2/M arrest and apoptosis. Collectively, this is the first report to show that isorhamnetin inhibited the proliferation of human bladder cancer cells by ROS-dependent arrest of the cell cycle at the G2/M phase and induction of apoptosis. Therefore, our results provide an important basis for the interpretation of the anti-cancer mechanism of isorhamnetin in bladder cancer cells and support the rationale for the need to evaluate more precise molecular mechanisms and in vivo anti-cancer properties.
Collapse
Affiliation(s)
- Cheol Park
- Department of Molecular Biology, College of Natural Sciences, Dong-eui University, Busan 47340, Korea;
| | - Hee-Jae Cha
- Department of Parasitology and Genetics, Kosin University College of Medicine, Busan 49267, Korea;
| | - Eun Ok Choi
- Anti-Aging Research Center, Dong-eui University, Busan 47227, Korea; (E.O.C.); (H.L.); (H.H.-B.); (S.Y.J.); (M.Y.K.); (S.Y.K.); (S.H.H.)
- Department of Biochemistry, Dong-eui University College of Korean Medicine, Busan 47227, Korea
| | - Hyesook Lee
- Anti-Aging Research Center, Dong-eui University, Busan 47227, Korea; (E.O.C.); (H.L.); (H.H.-B.); (S.Y.J.); (M.Y.K.); (S.Y.K.); (S.H.H.)
- Department of Biochemistry, Dong-eui University College of Korean Medicine, Busan 47227, Korea
| | - Hyun Hwang-Bo
- Anti-Aging Research Center, Dong-eui University, Busan 47227, Korea; (E.O.C.); (H.L.); (H.H.-B.); (S.Y.J.); (M.Y.K.); (S.Y.K.); (S.H.H.)
- Department of Molecular Biology, Pusan National University, Busan 46241, Korea;
| | - Seon Yeong Ji
- Anti-Aging Research Center, Dong-eui University, Busan 47227, Korea; (E.O.C.); (H.L.); (H.H.-B.); (S.Y.J.); (M.Y.K.); (S.Y.K.); (S.H.H.)
- Department of Molecular Biology, Pusan National University, Busan 46241, Korea;
| | - Min Yeong Kim
- Anti-Aging Research Center, Dong-eui University, Busan 47227, Korea; (E.O.C.); (H.L.); (H.H.-B.); (S.Y.J.); (M.Y.K.); (S.Y.K.); (S.H.H.)
- Department of Biochemistry, Dong-eui University College of Korean Medicine, Busan 47227, Korea
| | - So Young Kim
- Anti-Aging Research Center, Dong-eui University, Busan 47227, Korea; (E.O.C.); (H.L.); (H.H.-B.); (S.Y.J.); (M.Y.K.); (S.Y.K.); (S.H.H.)
- Department of Biochemistry, Dong-eui University College of Korean Medicine, Busan 47227, Korea
| | - Su Hyun Hong
- Anti-Aging Research Center, Dong-eui University, Busan 47227, Korea; (E.O.C.); (H.L.); (H.H.-B.); (S.Y.J.); (M.Y.K.); (S.Y.K.); (S.H.H.)
- Department of Biochemistry, Dong-eui University College of Korean Medicine, Busan 47227, Korea
| | - JaeHun Cheong
- Department of Molecular Biology, Pusan National University, Busan 46241, Korea;
| | - Gi-Young Kim
- Department of Marine Life Sciences, School of Marine Biomedical Sciences, Jeju National University, Jeju 63243, Korea;
| | - Seok Joong Yun
- Department of Urology, College of Medicine, Chungbuk National University, Chungbuk 8644, Korea;
| | - Hye Jin Hwang
- Department of Food and Nutrition, College of Nursing, Healthcare Sciences & Human Ecology, Dong-Eui University, Busan 47340, Korea;
| | - Wun-Jae Kim
- Department of Urology, College of Medicine, Chungbuk National University, Chungbuk 8644, Korea;
- Correspondence: (W.-J.K.); (Y.H.C.); Tel.: +82-43-269-6136 (W.-J.K.); +82-51-850-7413 (Y.H.C.)
| | - Yung Hyun Choi
- Anti-Aging Research Center, Dong-eui University, Busan 47227, Korea; (E.O.C.); (H.L.); (H.H.-B.); (S.Y.J.); (M.Y.K.); (S.Y.K.); (S.H.H.)
- Department of Biochemistry, Dong-eui University College of Korean Medicine, Busan 47227, Korea
- Correspondence: (W.-J.K.); (Y.H.C.); Tel.: +82-43-269-6136 (W.-J.K.); +82-51-850-7413 (Y.H.C.)
| |
Collapse
|
11
|
Medina-Medrano JR, Almaraz-Abarca N, González-Elizondo MS, Uribe-Soto JN, González-Valdez LS, Herrera-Arrieta Y. Phenolic constituents and antioxidant properties of five wild species of Physalis (Solanaceae). BOTANICAL STUDIES 2015; 56:24. [PMID: 28510833 PMCID: PMC5430310 DOI: 10.1186/s40529-015-0101-y] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2015] [Accepted: 08/11/2015] [Indexed: 05/29/2023]
Abstract
BACKGROUND Fruits of wild species of the genus Physalis are consumed as food and calyces and leaves are used in traditional medicine. The phenolic composition of the species of this genus have been scarcely studied. To contribute to a better knowledge for the use of all the potential of these wild species of plants, leaves, fruits, and calyces of five wild species of the genus were analyzed for their phenolic composition and antioxidant properties. RESULTS Important tissue- and species-dependent variations were found. Calyces of Physalis subulata showed the highest contents of phenolics (176.58 mg of gallic acid equivalents/g dry tissue), flavonoids (39.63 mg/g dry tissue), and phenolic acids (50.57 mg of quercitrin equivalents/g dry tissue), and its leaves displayed the highest total antioxidant capacity (3.59 mg of ascorbic acid equivalents/mL) and one of the highest reduction powers (0.54 µg of ascorbic acid equivalents/mL). A high performance liquid chromatography with photodiode array detection analysis revealed a total of 28 phenolic compounds in foliar tissues (mainly kaempferol-3-O-glycosides), 16 in fruits (mainly phenolic acids), and 16 in calyces (mainly kaempferol-3-O-glycosides); the profiles of these compounds in the three types of tissue were species-specific. CONCLUSIONS The studied species of Physalis are important sources of phenolics with relevant antioxidant activity. The current results indicate that phenolic profiles are valuable specific chemical markers and can be relevant as food tracing and authenticity indicators for plant-based preparations involving species of Physalis.
Collapse
Affiliation(s)
- José Roberto Medina-Medrano
- Centro Interdisciplinario de Investigación para el Desarrollo Integral Regional, Unidad Durango, Instituto Politécnico Nacional, Sigma 119, Fraccionamiento 20 de Noviembre II, 34220 Durango, Dgo. Mexico
| | - Norma Almaraz-Abarca
- Centro Interdisciplinario de Investigación para el Desarrollo Integral Regional, Unidad Durango, Instituto Politécnico Nacional, Sigma 119, Fraccionamiento 20 de Noviembre II, 34220 Durango, Dgo. Mexico
| | - M. Socorro González-Elizondo
- Centro Interdisciplinario de Investigación para el Desarrollo Integral Regional, Unidad Durango, Instituto Politécnico Nacional, Sigma 119, Fraccionamiento 20 de Noviembre II, 34220 Durango, Dgo. Mexico
| | - José Natividad Uribe-Soto
- Centro Interdisciplinario de Investigación para el Desarrollo Integral Regional, Unidad Durango, Instituto Politécnico Nacional, Sigma 119, Fraccionamiento 20 de Noviembre II, 34220 Durango, Dgo. Mexico
| | - Laura Silvia González-Valdez
- Centro Interdisciplinario de Investigación para el Desarrollo Integral Regional, Unidad Durango, Instituto Politécnico Nacional, Sigma 119, Fraccionamiento 20 de Noviembre II, 34220 Durango, Dgo. Mexico
| | - Yolanda Herrera-Arrieta
- Centro Interdisciplinario de Investigación para el Desarrollo Integral Regional, Unidad Durango, Instituto Politécnico Nacional, Sigma 119, Fraccionamiento 20 de Noviembre II, 34220 Durango, Dgo. Mexico
| |
Collapse
|
12
|
Song JJ, Lu Y, Zhu SW, Huang QA, Wei Y. Selective detection toward quercetin and kaempferol on NH3-plasma treated carbon nanotubes modified glassy carbon electrode. ANAL SCI 2015; 31:225-30. [PMID: 25765278 DOI: 10.2116/analsci.31.225] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
NH3-plasma treated multi-walled carbon nanotubes (pn-MWCNTs) were prepared based on the plasma technique and developed as sensing materials for detection of quercetin and kaempferol with the differential pulse voltammetry (DPV) and amperometric measurement. Such experimental parameters as pH values, accumulation potential and accumulation time were carefully investigated. The pn-MWCNTs modified electrode (pn-MWCNTs/GCE) was further explored for the analysis of quercetin and kaempferol in diluted blood serum and average recovery rates of 96.91 and 100.5% were obtained, respectively. In addition, the interference and stability measurements were evaluated under the optimized experimental conditions. More importantly, selective detection toward quercetin and kaempferol was achieved, and the proposed electrochemical sensing strategy was available to distinguish substances with similar oxidation potential.
Collapse
|
13
|
Duan J, Dang Y, Meng H, Wang H, Ma P, Li G, Wu T, Xie Y. A comparison of the pharmacokinetics of three different preparations of total flavones of Hippophae rhamnoides in beagle dogs after oral administration. Eur J Drug Metab Pharmacokinet 2015; 41:239-49. [DOI: 10.1007/s13318-015-0254-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2014] [Accepted: 01/13/2015] [Indexed: 12/01/2022]
|
14
|
Phytic acid enhances the oral absorption of isorhamnetin, quercetin, and kaempferol in total flavones of Hippophae rhamnoides L. Fitoterapia 2014; 93:216-25. [DOI: 10.1016/j.fitote.2014.01.013] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2013] [Revised: 12/31/2013] [Accepted: 01/09/2014] [Indexed: 01/04/2023]
|
15
|
Barriada-Bernal LG, Almaraz-Abarca N, Delgado-Alvarado EA, Gallardo-Velázquez T, Ávila-Reyes JA, Torres-Morán MI, González-Elizondo MDS, Herrera-Arrieta Y. Flavonoid composition and antioxidant capacity of the edible flowers ofAgave durangensis(Agavaceae). CYTA - JOURNAL OF FOOD 2013. [DOI: 10.1080/19476337.2013.801037] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
16
|
Almaraz-Abarca N, Delgado-Alvarado EA, Ávila-Reyes JA, Uribe-Soto JN, González-Valdez LS. The Phenols of the Genus <i>Agave</i> (Agavaceae). ACTA ACUST UNITED AC 2013. [DOI: 10.4236/jbnb.2013.43a002] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
17
|
Zhou JY, Zhou SW, Du XH, Zeng SY. Protective effect of total flavonoids of seabuckthorn (Hippophae rhamnoides) in simulated high-altitude polycythemia in rats. Molecules 2012; 17:11585-97. [PMID: 23023684 PMCID: PMC6269044 DOI: 10.3390/molecules171011585] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2012] [Revised: 09/04/2012] [Accepted: 09/04/2012] [Indexed: 11/28/2022] Open
Abstract
Seabuckthorn (Hippophae rhamnoides L.) has been used to treat high altitude diseases. The effects of five-week treatment with total flavonoids of seabuckthorn (35, 70, 140 mg/kg, ig) on cobalt chloride (5.5 mg/kg, ip)- and hypobaric chamber (simulating 5,000 m)-induced high-altitude polycythemia in rats were measured. Total flavonoids decreased red blood cell number, hemoglobin, hematocrit, mean corpuscular hemoglobin levels, span of red blood cell electrophoretic mobility, aggregation index of red blood cell, plasma viscosity, whole blood viscosity, and increased deformation index of red blood cell, erythropoietin level in serum. Total flavonoids increased pH, pO2, SpO2, pCO2 levels in arterial blood, and increased Na+, HCO3−, Cl−, but decreased K+ concentrations. Total flavonoids increased mean arterial pressure, left ventricular systolic pressure, end-diastolic pressure, maximal rate of rise and decrease, decreased heart rate and protected right ventricle morphology. Changes in hemodynamic, hematologic parameters, and erythropoietin content suggest that administration of total flavonoids from seabuckthorn may be useful in the prevention of high altitude polycythaemia in rats.
Collapse
Affiliation(s)
- Ji-Yin Zhou
- Base for Drug Clinical Trial, Xinqiao Hospital, Third Military Medical University, Chongqing 400037, China; (J.-Y.Z.); (S.-Y.Z.)
| | - Shi-Wen Zhou
- Base for Drug Clinical Trial, Xinqiao Hospital, Third Military Medical University, Chongqing 400037, China; (J.-Y.Z.); (S.-Y.Z.)
- Author to whom correspondence should be addressed; ; Tel./Fax: +86-23-6875-5311
| | - Xiao-Huang Du
- Research Division, Southwest Hospital, Third Military Medical University, Chongqing 400038, China;
| | - Sheng-Ya Zeng
- Base for Drug Clinical Trial, Xinqiao Hospital, Third Military Medical University, Chongqing 400037, China; (J.-Y.Z.); (S.-Y.Z.)
| |
Collapse
|
18
|
Zhao G, Duan J, Xie Y, Lin G, Luo H, Li G, Yuan X. Effects of solid dispersion and self-emulsifying formulations on the solubility, dissolution, permeability and pharmacokinetics of isorhamnetin, quercetin and kaempferol in total flavones ofHippophae rhamnoidesL. Drug Dev Ind Pharm 2012; 39:1037-45. [DOI: 10.3109/03639045.2012.699066] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
|
19
|
Zheng XF, Zao J, Chen GF, Liu SL, Li GX. Electroanalysis of kaempferol using pyrolytic graphite and a hemoglobin/polysorbate-20 modified electrodes. JOURNAL OF ANALYTICAL CHEMISTRY 2011. [DOI: 10.1134/s1061934808040126] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
20
|
Wu AH, Sun JJ, Fang YM, Zheng RJ, Chen GN. Hot Electron Induced Cathodic Electrochemiluminescence at Disposable Screen Printed Carbon Electrodes. ELECTROANAL 2010. [DOI: 10.1002/elan.201000233] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|
21
|
Xie Y, Zeng X, Li G, Cai Z, Ding N, Ji G. Assessment of intestinal absorption of total flavones ofHippophae rhamnoides L.in rat using in situ absorption models. Drug Dev Ind Pharm 2010; 36:787-94. [DOI: 10.3109/03639040903514820] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
|
22
|
Sensitive determination of kaempferol in rat plasma by high-performance liquid chromatography with chemiluminescence detection and application to a pharmacokinetic study. J Chromatogr B Analyt Technol Biomed Life Sci 2009; 877:3595-600. [DOI: 10.1016/j.jchromb.2009.08.046] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2009] [Revised: 08/26/2009] [Accepted: 08/30/2009] [Indexed: 11/24/2022]
|
23
|
Xie Y, Li G, Yuan X, Cai Z, Rong R. Preparation and in vitro evaluation of solid dispersions of total flavones of Hippophae rhamnoides L. AAPS PharmSciTech 2009; 10:631-40. [PMID: 19452282 DOI: 10.1208/s12249-009-9246-x] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2008] [Accepted: 04/23/2009] [Indexed: 11/30/2022] Open
Abstract
The purpose of this study was to enhance the dissolution of total flavones of Hippophae rhamnoides L. (TFH) by solid dispersions consisting of the drug and a polymeric carrier, poloxamer 188 (PXM). The solvent evaporation method was used to prepare solid dispersions. A 3(2) full-factorial design approach was used for optimization wherein the amount of solvent (X(1)) and the drug-to-polymer ratio (X(2)) were selected as independent variables and the percentage of TFH dissolved in 10 min (Q(10)) was selected as the dependent variable. Multiple linear regression analysis revealed that a suitable level of (1) and X(2) was required for obtaining higher dissolution of TFH from PXM solid dispersions. Solid dispersions were characterized by differential scanning calorimetry, X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, and dissolution tests. Characterization studies revealed that solid dispersion of TFH-PXM showed enhancement of TFH dissolution due to the conversion of TFH into a less crystalline and/or amorphous form. In conclusion, dissolution enhancement of TFH was obtained by preparing its solid dispersions in PXM using solvent method.
Collapse
|
24
|
Biesaga M, Pyrzynska K. Analytical Procedures for Determination of Quercetin and its Glycosides in Plant Material. Crit Rev Anal Chem 2009. [DOI: 10.1080/10408340902820718] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
|
25
|
Gámiz-Gracia L, García-Campaña AM, Huertas-Pérez JF, Lara FJ. Chemiluminescence detection in liquid chromatography: Applications to clinical, pharmaceutical, environmental and food analysis—A review. Anal Chim Acta 2009; 640:7-28. [DOI: 10.1016/j.aca.2009.03.017] [Citation(s) in RCA: 117] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2008] [Revised: 03/12/2009] [Accepted: 03/12/2009] [Indexed: 10/21/2022]
|
26
|
Santiago Valverde R, Sánchez Pérez I, Franceschelli F, Martínez Galera M, Gil García MD. Determination of photoirradiated tetracyclines in water by high-performance liquid chromatography with chemiluminescence detection based reaction of rhodamine B with cerium (IV). J Chromatogr A 2007; 1167:85-94. [PMID: 17765910 DOI: 10.1016/j.chroma.2007.08.043] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2007] [Revised: 08/13/2007] [Accepted: 08/15/2007] [Indexed: 11/18/2022]
Abstract
A simple, selective and sensitive method has been developed for the simultaneous determination of tetracycline, oxytetracycline, chlorotetracycline, demeclocycline, doxycycline and meclocycline based on reversed-phase high-performance liquid chromatography with chemiluminescence detection. The procedure was based on the chemiluminescent enhancement by photoirradiated tetracyclines of the cerium (IV)-rhodamine B system in sulphuric acid medium. The six tetracyclines were separated on an Aquasil-C18 column with a gradient elution using a mixture of acetonitrile and 0.1 mol L(-1) phosphate buffer as mobile phase, photoderivatized using a photoreactor consisting of a tube reactor coil of PFA and a 8W Xenon lamp. Under the optimized conditions, the method was validated with respect to linearity, precision, limits of detection and quantification and accuracy. The relative standard deviation (RSD) on intra-day precision was below 10% and detection limits ranged between 0.12 and 0.34 microg L(-1). The proposed method has been successfully applied to the determination of tetracyclines in surface water samples. A possible mechanism of the chemiluminescence in the system is discussed.
Collapse
Affiliation(s)
- R Santiago Valverde
- Department of Analytical Chemistry, Faculty of Experimental Sciences, University of Almeria, 04061 Almeria, Spain
| | | | | | | | | |
Collapse
|
27
|
Xiao P, Zhao F, Zeng B. Voltammetric determination of quercetin at a multi-walled carbon nanotubes paste electrode. Microchem J 2007. [DOI: 10.1016/j.microc.2006.06.004] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
28
|
Gutzeit D, Wray V, Winterhalter P, Jerz G. Preparative Isolation and Purification of Flavonoids and Protocatechuic Acid from Sea Buckthorn Juice Concentrate (Hippophaë rhamnoides L. ssp. rhamnoides) by High-Speed Counter-Current Chromatography. Chromatographia 2006. [DOI: 10.1365/s10337-006-0105-6] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|