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Su W, Li Y, Chang AK, Sheng T, Pei Y, Li J, Li H, Liu K, Xu L, Liu W, Ai J, Zhang Z, Wang Y, Jiang Z, Liang X. Identification of Novel Alkaloids from Portulaca oleracea L. and Characterization of Their Pharmacokinetics and GLP-1 Secretion-Promoting Activity in STC-1 Cells. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:19804-19816. [PMID: 38038649 DOI: 10.1021/acs.jafc.3c05191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/02/2023]
Abstract
Six new alkaloids (compounds 1-6) were isolated from Portulaca oleracea L. The compounds were triple pair (1 and 2, 3 and 4, and 5 and 6) enantiomers, with 1, 3, and 5 in the R-configuration and 2, 4, and 6 in the S-configuration, and all could bind to SUR1 according to molecular docking analysis. Treatment of STC-1 cells with each compound led to an influx of intracellular Ca2+, eventually leading to the secretion of glucagon-like peptide-1 (GLP-1), with compound 3 giving the highest secretion, resulting in 24.3 ± 7.03% more GLP-1 than nateglinide-treated cells, suggesting that these alkaloids may be able to reduce blood glucose based on their ability to stimulate the release of GLP-1. Furthermore, compound 3 also exhibited slightly faster absorption than nateglinide, as shown by pharmacokinetic analysis conducted in rats. Therefore, the results showed that some purslane alkaloids (such as compound 3) had good pharmacological activity in vivo and may have preventive and therapeutic effects on diabetes.
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Affiliation(s)
- Weiping Su
- School of Pharmaceutical Sciences, Liaoning University, 66 Chongshan Road, Shenyang, Liaoning Province 110036, P.R. China
| | - Yanan Li
- School of Pharmaceutical Sciences, Liaoning University, 66 Chongshan Road, Shenyang, Liaoning Province 110036, P.R. China
| | - Alan Kueichieh Chang
- College of Life and Environmental Sciences, Wenzhou University, Wenzhou, Zhejiang Province 325035, P.R. China
| | - Tongling Sheng
- School of Pharmaceutical Sciences, Liaoning University, 66 Chongshan Road, Shenyang, Liaoning Province 110036, P.R. China
| | - Ying Pei
- School of Pharmaceutical Sciences, Liaoning University, 66 Chongshan Road, Shenyang, Liaoning Province 110036, P.R. China
| | - Jianxin Li
- School of Pharmaceutical Sciences, Liaoning University, 66 Chongshan Road, Shenyang, Liaoning Province 110036, P.R. China
| | - Haoran Li
- School of Pharmaceutical Sciences, Liaoning University, 66 Chongshan Road, Shenyang, Liaoning Province 110036, P.R. China
| | - Kai Liu
- School of Pharmaceutical Sciences, Liaoning University, 66 Chongshan Road, Shenyang, Liaoning Province 110036, P.R. China
| | - Liuping Xu
- School of Pharmaceutical Sciences, Liaoning University, 66 Chongshan Road, Shenyang, Liaoning Province 110036, P.R. China
| | - Wenbao Liu
- School of Pharmaceutical Sciences, Liaoning University, 66 Chongshan Road, Shenyang, Liaoning Province 110036, P.R. China
| | - Jiao Ai
- School of Pharmaceutical Sciences, Liaoning University, 66 Chongshan Road, Shenyang, Liaoning Province 110036, P.R. China
| | - Zhicheng Zhang
- School of Pharmaceutical Sciences, Liaoning University, 66 Chongshan Road, Shenyang, Liaoning Province 110036, P.R. China
| | - Yimeng Wang
- School of Pharmaceutical Sciences, Liaoning University, 66 Chongshan Road, Shenyang, Liaoning Province 110036, P.R. China
| | - Zhen Jiang
- Department of Analytical Chemistry, College of Pharmacy, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang, Liaoning Province 110016, P.R. China
| | - Xiao Liang
- School of Pharmaceutical Sciences, Liaoning University, 66 Chongshan Road, Shenyang, Liaoning Province 110036, P.R. China
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Navarro-León E, Grazioso A, Atero-Calvo S, Rios JJ, Esposito S, Blasco B. Evaluation of the alkalinity stress tolerance of three Brassica rapa CAX1 TILLING mutants. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2023; 198:107712. [PMID: 37116247 DOI: 10.1016/j.plaphy.2023.107712] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2023] [Revised: 04/13/2023] [Accepted: 04/17/2023] [Indexed: 05/07/2023]
Abstract
Alkalinity is an important environmental factor that affects crop production and will be exacerbated in the current climate change scenario. Thus, the presence of carbonates and high pH in soils negatively impacts nutrient assimilation and photosynthesis and causes oxidative stress. A potential strategy to improve tolerance to alkalinity could be the modification of cation exchanger (CAX) activity, given that these transporters are involved in calcium (Ca2+) signaling under stresses. In this study, we used three Brassica rapa mutants (BraA.cax1a-4, BraA.cax1a-7, and BraA.cax1a-12) from the parental line 'R-o-18' that were generated by Targeting Induced Local Lesions in Genomes (TILLING) and grown under control and alkaline conditions. The objective was to assess the tolerance of these mutants to alkalinity stress. Biomass, nutrient accumulation, oxidative stress, and photosynthesis parameters were analyzed. The results showed that BraA.cax1a-7 mutation was negative for alkalinity tolerance because it reduced plant biomass, increased oxidative stress, partially inhibited antioxidant response, and lowered photosynthesis performance. Conversely, the BraA.cax1a-12 mutation increased plant biomass and Ca2+ accumulation, reduced oxidative stress, and improved antioxidant response and photosynthesis performance. Hence, this study identifies BraA.cax1a-12 as a useful CAX1 mutation to enhance the tolerance of plants grown under alkaline conditions.
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Affiliation(s)
- Eloy Navarro-León
- Department of Plant Physiology, Faculty of Sciences, University of Granada, 18071, Granada, Spain.
| | - Angela Grazioso
- Dipartimento di Biologia, Università di Napoli "Federico II", Complesso Universitario di Monte Sant'Angelo, Via Cinthia, 80126, Napoli, Italy.
| | - Santiago Atero-Calvo
- Department of Plant Physiology, Faculty of Sciences, University of Granada, 18071, Granada, Spain.
| | - Juan José Rios
- Department of Plant Physiology, Faculty of Sciences, University of Granada, 18071, Granada, Spain.
| | - Sergio Esposito
- Dipartimento di Biologia, Università di Napoli "Federico II", Complesso Universitario di Monte Sant'Angelo, Via Cinthia, 80126, Napoli, Italy.
| | - Begoña Blasco
- Department of Plant Physiology, Faculty of Sciences, University of Granada, 18071, Granada, Spain.
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He J, You X, Qin L. High Salinity Reduces Plant Growth and Photosynthetic Performance but Enhances Certain Nutritional Quality of C 4 Halophyte Portulaca oleracea L. Grown Hydroponically Under LED Lighting. FRONTIERS IN PLANT SCIENCE 2021; 12:651341. [PMID: 33828578 PMCID: PMC8019967 DOI: 10.3389/fpls.2021.651341] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2021] [Accepted: 03/01/2021] [Indexed: 05/27/2023]
Abstract
Portulaca oleracea L. (known as purslane) is one of the most nutritious leafy vegetables owing to its high content of antioxidants. In this study, all plants were grown indoors hydroponically with different NaCl salinities. Photosynthetic photo flux density (PPFD) at 200 μmol m-2 s-1 (12 h) was provided to all plants by LED with red:blue ratio of 2.2. Thirty days after transplanting, plants grown with100 mM NaCl had the highest productivity and the fastest leaf growth followed by those with 0, 200 and 300 mM NaCl. Grown with 300 mM NaCl, purslane had the lowest specific leaf area due to its highest leaf dry matter content and its lowest water content. All plants had similar values of leaf succulence except for those with 300 mM NaCl. Total chlorophyll and carotenoids contents were significantly higher in plants grown with 0 and 100 mM NaCl than with 200, and 300 mM NaCl. All plants had Fv/Fm ratios close to 0.8. However, electron transport rate and ΔF/Fm' were significantly higher in plants grown with 0 and 100 mM NaCl than with 200 and 300 mM NaCl. CAM-induced purslane with 300 mM NaCl had higher non-photochemical quenching. Maximum net photosynthetic O2 evolution rate and Cyt b6f concentration were significantly lower with 300 mM NaCl compared to all other plants while all plants had similar PS II concentration. Proline concentration increased with increasing salinities. All plants had similar levels of total soluble sugars. Plants grown with 0 and 100 mM NaCl had significantly higher concentrations of NO3 -, total reduced nitrogen, total leaf soluble protein, Rubisco protein, total ascorbic acid, and total phenolic compounds than with 200 and 300 mM NaCl. The highest concentrations of K, Ca, and Mg were found in purslane grown under 0 mM NaCl. Statistically, no significant differences in Fe concentrations were observed among all plants. However, salinity seems to increase Fe concentration. In conclusion, it is feasible to grow purslane under 100 mM NaCl as it is the most optimal condition to achieve higher productivity and better quality. However, the production of antioxidants may depend on not only salinity but also other growth conditions.
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