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Article: Rapid monitoring of flavonoid content in sweet tea (Lithocarpus litseifolius (Hance) Chun) leaves using NIR spectroscopy.

Tian, Zhaoxia / Tan, Zifeng / Li, Yanjie / Yang, Zhiling

2022 Volume 18, Issue 1, Page(s) 44

Abstract: Background: Sweet tea, which functions as tea, sugar and medicine, was listed as a new food resource in 2017. Flavonoids are the main medicinal components in sweet tea and have significant pharmacological activities. Therefore, the quality of sweet tea ... ...

Abstract	Background: Sweet tea, which functions as tea, sugar and medicine, was listed as a new food resource in 2017. Flavonoids are the main medicinal components in sweet tea and have significant pharmacological activities. Therefore, the quality of sweet tea is related to the content of flavonoids. Flavonoid content in plants is normally determined by time-consuming and expensive chemical analyses. The aim of this study was to develop a methodology to measure three constituents of flavonoids, namely, total flavonoids, phloridin and trilobatin, in sweet tea leaves using near-infrared spectroscopy (NIR). Results: In this study, we demonstrated that the combination of principal component analysis (PCA) and NIR spectroscopy can distinguish sweet tea from different locations. In addition, different spectral preprocessing methods are used to establish partial least squares (PLS) models between spectral information and the content of the three constituents. The best total flavonoid prediction model was obtained with NIR spectra preprocessed with Savitzky-Golay combined with second derivatives (SG + D2) (R Conclusions: The conclusion indicated that NIR spectroscopy has the ability to determine the flavonoid content of sweet tea quickly and conveniently.
Language	English
Publishing date	2022-04-02
Publishing country	England
Document type	Journal Article
ZDB-ID	2203723-8
ISSN	1746-4811
ISSN	1746-4811
DOI	10.1186/s13007-022-00878-y
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Identification of active compounds and molecular mechanisms of Dalbergia tsoi Merr.et Chun to accelerate wound healing.

Zhang, Han / Li, Wei / Zhang, Qian / Zhong, Renxing / Li, Chuanqiu / Chen, Ying / Xia, Tianyi / Peng, Mingming / Ren, Zhonglu / Zhao, Hong / Wang, Yi / Shu, Zunpeng

Biomedicine & pharmacotherapy = Biomedecine & pharmacotherapie

2022 Volume 150, Page(s) 112990

Abstract: As a traditional Chinese medicine, Dalbergia tsoi Merr.et Chun (JZX) has been used ...

Abstract	As a traditional Chinese medicine, Dalbergia tsoi Merr.et Chun (JZX) has been used for the treatment of wounds since ancient times. However, the active compounds and molecular mechanisms of JZX in the acceleration of wound healing are still unknown. Herein, we explored the main active compounds and key molecular mechanisms by which JZX accelerates wound healing. The ethanol extract of JZX was subjected to UPLC-Q-Orbitrap HRMS analysis to identify the main compounds. The pharmacological effect of JZX on wound healing was evaluated using a mouse excision wound model. Network pharmacology was utilized to predict the effective compounds and related signal transduction pathways of JZX that were involved in accelerating wound healing. The predicted key signaling pathways were then validated by immunohistochemical analysis. Interactions between the active compounds and therapeutic targets were confirmed by molecular docking analysis. JZX accelerated wound healing, improved tissue quality, and inhibited inflammation and oxidative stress. Moreover, our results suggested that the active components of JZX, such as butin, eriodyctiol, and formononetin, are the key compounds that facilitate wound treatment. Our studies also indicated that JZX accelerated wound healing by regulating the PI3K/Akt signaling pathway and inducing the expression of TGF-β1, FGF2, VEGFA, ECM1, and α-SMA at different stages of skin wound healing. The JZX extract accelerates wound healing by reducing inflammation and inhibiting oxidative stress, regulating the PI3K/Akt signaling pathway, and promoting the expression of growth factors, suggesting that JZX has potential clinical applicability in wound treatment.
MeSH term(s)	Dalbergia ; Inflammation ; Molecular Docking Simulation ; Phosphatidylinositol 3-Kinases/metabolism ; Plant Extracts/pharmacology ; Proto-Oncogene Proteins c-akt/metabolism ; Wound Healing
Chemical Substances	Plant Extracts ; Proto-Oncogene Proteins c-akt (EC 2.7.11.1)
Language	English
Publishing date	2022-04-21
Publishing country	France
Document type	Journal Article
ZDB-ID	392415-4
ISSN	1950-6007 ; 0753-3322 ; 0300-0893
ISSN (online)	1950-6007
ISSN	0753-3322 ; 0300-0893
DOI	10.1016/j.biopha.2022.112990
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article: Rapid monitoring of flavonoid content in sweet tea (Lithocarpus litseifolius (Hance) Chun) leaves using NIR spectroscopy

Tian, Zhaoxia / Tan, Zifeng / Li, Yanjie / Yang, Zhiling

Plant methods. 2022 Dec., v. 18, no. 1

2022

Abstract: BACKGROUND: Sweet tea, which functions as tea, sugar and medicine, was listed as a new food resource in 2017. Flavonoids are the main medicinal components in sweet tea and have significant pharmacological activities. Therefore, the quality of sweet tea ... ...

Abstract	BACKGROUND: Sweet tea, which functions as tea, sugar and medicine, was listed as a new food resource in 2017. Flavonoids are the main medicinal components in sweet tea and have significant pharmacological activities. Therefore, the quality of sweet tea is related to the content of flavonoids. Flavonoid content in plants is normally determined by time-consuming and expensive chemical analyses. The aim of this study was to develop a methodology to measure three constituents of flavonoids, namely, total flavonoids, phloridin and trilobatin, in sweet tea leaves using near-infrared spectroscopy (NIR). RESULTS: In this study, we demonstrated that the combination of principal component analysis (PCA) and NIR spectroscopy can distinguish sweet tea from different locations. In addition, different spectral preprocessing methods are used to establish partial least squares (PLS) models between spectral information and the content of the three constituents. The best total flavonoid prediction model was obtained with NIR spectra preprocessed with Savitzky–Golay combined with second derivatives (SG + D2) (RP² = 0.893, and RMSEP = 0.131). For trilobatin, the model with the best performance was developed with raw NIR spectra (RP² = 0.902, and RMSEP = 2.993), and for phloridin, the best model was obtained with NIR spectra preprocessed with standard normal variate (SNV) (RP² = 0.818, and RMSEP = 1.085). The coefficients of determination for all calibration sets, validation sets and prediction sets of the best PLS models were higher than 0.967, 0.858 and 0.818, respectively. CONCLUSIONS: The conclusion indicated that NIR spectroscopy has the ability to determine the flavonoid content of sweet tea quickly and conveniently.
Keywords	Lithocarpus ; flavonoids ; medicine ; models ; near-infrared spectroscopy ; prediction ; principal component analysis ; sugars ; tea
Language	English
Dates of publication	2022-12
Size	p. 44.
Publishing place	BioMed Central
Document type	Article
ZDB-ID	2203723-8
ISSN	1746-4811
ISSN	1746-4811
DOI	10.1186/s13007-022-00878-y
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: Rapid monitoring of flavonoid content in sweet tea (Lithocarpus litseifolius (Hance) Chun) leaves using NIR spectroscopy

Zhaoxia Tian / Zifeng Tan / Yanjie Li / Zhiling Yang

Plant Methods, Vol 18, Iss 1, Pp 1-

2022 Volume 9

Abstract: Abstract Background Sweet tea, which functions as tea, sugar and medicine, was listed as a new food resource in 2017. Flavonoids are the main medicinal components in sweet tea and have significant pharmacological activities. Therefore, the quality of ... ...

Abstract	Abstract Background Sweet tea, which functions as tea, sugar and medicine, was listed as a new food resource in 2017. Flavonoids are the main medicinal components in sweet tea and have significant pharmacological activities. Therefore, the quality of sweet tea is related to the content of flavonoids. Flavonoid content in plants is normally determined by time-consuming and expensive chemical analyses. The aim of this study was to develop a methodology to measure three constituents of flavonoids, namely, total flavonoids, phloridin and trilobatin, in sweet tea leaves using near-infrared spectroscopy (NIR). Results In this study, we demonstrated that the combination of principal component analysis (PCA) and NIR spectroscopy can distinguish sweet tea from different locations. In addition, different spectral preprocessing methods are used to establish partial least squares (PLS) models between spectral information and the content of the three constituents. The best total flavonoid prediction model was obtained with NIR spectra preprocessed with Savitzky–Golay combined with second derivatives (SG + D2) (RP 2 = 0.893, and RMSEP = 0.131). For trilobatin, the model with the best performance was developed with raw NIR spectra (RP 2 = 0.902, and RMSEP = 2.993), and for phloridin, the best model was obtained with NIR spectra preprocessed with standard normal variate (SNV) (RP 2 = 0.818, and RMSEP = 1.085). The coefficients of determination for all calibration sets, validation sets and prediction sets of the best PLS models were higher than 0.967, 0.858 and 0.818, respectively. Conclusions The conclusion indicated that NIR spectroscopy has the ability to determine the flavonoid content of sweet tea quickly and conveniently.
Keywords	Sweet tea ; Flavonoids content ; Near-infrared (NIR) spectroscopy ; Partial least squares (PLS) model ; Model calibration ; Plant culture ; SB1-1110 ; Biology (General) ; QH301-705.5
Subject code	571
Language	English
Publishing date	2022-04-01T00:00:00Z
Publisher	BMC
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article: Effect of microbial fermentation on the sensory characteristics and chemical compositions of Chinese sweet tea (Lithocarpus litseifolius (Hance) Chun)

Huang, Weimin / Zhang, Changyi / Gu, Zepeng / Li, Cheng / Fang, Zhengfeng / Zeng, Zhen / Zhang, Zhiqing / Hu, Bin / Chen, Hong / Wu, Wenjuan / Wang, Tiqiang / Lan, Xiguo / Liu, Yuntao

Food bioscience. 2022 Apr., v. 46

2022

Abstract: Sweet tea, which has hundreds of years of use among in Chinese folk, is a traditional herbal tea with pleasant sweetness, bitterness and astringency. In the current study, we used traditional microbial fermentation to improve sensory characteristics of ... ...

Abstract	Sweet tea, which has hundreds of years of use among in Chinese folk, is a traditional herbal tea with pleasant sweetness, bitterness and astringency. In the current study, we used traditional microbial fermentation to improve sensory characteristics of sweet tea, especially for the reduction of bitterness and astringency. The dynamic changes of non-volatile, volatile compounds and microbial community were investigated during microbial fermentation. The contents of polyphenols, flavonoids, soluble sugar, soluble protein, catechins and dihydrochalcones decreased significantly while the tea pigments, free amino acids and gallic acid content inversely increased during microbial fermentation. A total of 61 volatile compounds were identified and quantified in sweet tea, of which 20 key compounds were identified as odor active compounds (OAV), including 3 aldehydes, 1 ketone, 4 alcohols, 9 esters, 4 alkenes and 3 other compounds. In addition, eight fungi and four bacteria were considered as core microorganisms, such as Aspergillus, Alternaria, Cladosporium, Epicoccum, Itersonilia, Penicillium, Periconia, Wallemia, Aureimonas, Enterobacter, Klebsiella and Stenotrophomonas, which were significantly correlated with non-volatile compounds and flavor compounds. These results provided theoretical guidance for processing of fermented sweet tea.
Keywords	Alternaria ; Aspergillus ; Cladosporium ; Enterobacter ; Epicoccum ; Klebsiella ; Lithocarpus ; Penicillium ; Periconia ; Stenotrophomonas ; Wallemia ; alkenes ; astringency ; bitterness ; fermentation ; flavanols ; gallic acid ; herbal tea ; microbial communities ; odors ; polyphenols ; sugars ; sweetness
Language	English
Dates of publication	2022-04
Publishing place	Elsevier Ltd
Document type	Article
ISSN	2212-4292
DOI	10.1016/j.fbio.2022.101567
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: In vitro plant regeneration of Zenia insignis Chun

Yu-qing Zhou / Meng-jie Zhang / Deng Zhang / Jun-jie Zhang / Jing-jian Li / Xiao-yang Chen

Open Life Sciences, Vol 13, Iss 1, Pp 34-

2018 Volume 41

Abstract: Zenia insignis Chun is a large, fast-growing deciduous tree. In this study, we successfully ...

Abstract	Zenia insignis Chun is a large, fast-growing deciduous tree. In this study, we successfully developed a reliable and efficient protocol for the regeneration of fertile plants via callus induction from leaf segments of young Z. insignis seedlings. The best results were obtained with a medium containing 11.00 μM 6-benzyladenine (6-BA), 1.20 μM indole-3-butytric acid (IBA), and 0.45 μM 2,4-dichlorophenoxyacetic acid (2,4-D), which yielded morphogenic callus within 2 weeks at a frequency of 62.23%. We tested the effect of IBA alone and in combination with 6-BA on the bud differentiation response of Z. insignis callus. Shoots differentiated normally when cultured on differentiation medium containing 6.00 μM 6-BA and 1.20 μM IBA. Regenerated buds elongated successfully in medium containing 1.20 μM gibberellic acid (GA3). The elongated shoots were then transferred to Murashige and Skoog basal medium supplemented with various combinations of naphthalene acetic acid (NAA) for root induction; well-developed roots were achieved on MS basal medium supplemented with 0.01 μM NAA at a rooting rate of 89.23%. Rooted plantlets were successfully acclimatised to a greenhouse at a survival rate exceeding 90.00%.
Keywords	callus induction ; regeneration ; root induction ; zenia insignis chun ; Biology (General) ; QH301-705.5
Subject code	580
Language	English
Publishing date	2018-04-01T00:00:00Z
Publisher	De Gruyter
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article: In vitro plant regeneration of Zenia insignis Chun

Yu-qing, Zhou / Chen Xiao-yang / Li Jing-jian / Zhang Deng / Zhang Jun-jie / Zhang Meng-jie

Open life sciences. 2018 Apr. 06, v. 13, no. 1

2018

Abstract: Zenia insignis Chun is a large, fast-growing deciduous tree. In this study, we successfully ...

Abstract	Zenia insignis Chun is a large, fast-growing deciduous tree. In this study, we successfully developed a reliable and efficient protocol for the regeneration of fertile plants via callus induction from leaf segments of young Z. insignis seedlings. The best results were obtained with a medium containing 11.00 μM 6-benzyladenine (6-BA), 1.20 μM indole-3-butytric acid (IBA), and 0.45 μM 2,4-dichlorophenoxyacetic acid (2,4-D), which yielded morphogenic callus within 2 weeks at a frequency of 62.23%. We tested the effect of IBA alone and in combination with 6-BA on the bud differentiation response of Z. insignis callus. Shoots differentiated normally when cultured on differentiation medium containing 6.00 μM 6-BA and 1.20 μM IBA. Regenerated buds elongated successfully in medium containing 1.20 μM gibberellic acid (GA3). The elongated shoots were then transferred to Murashige and Skoog basal medium supplemented with various combinations of naphthalene acetic acid (NAA) for root induction; well-developed roots were achieved on MS basal medium supplemented with 0.01 μM NAA at a rooting rate of 89.23%. Rooted plantlets were successfully acclimatised to a greenhouse at a survival rate exceeding 90.00%.
Keywords	2,4-D ; benzyladenine ; buds ; callus ; culture media ; gibberellic acid ; greenhouses ; indole butyric acid ; leaves ; naphthaleneacetic acid ; plantlets ; protocols ; rooting ; seedlings ; shoots ; survival rate ; trees ; Zenia
Language	English
Dates of publication	2018-0406
Size	p. 34-41.
Publishing place	De Gruyter Open
Document type	Article
ZDB-ID	2817958-4
ISSN	2391-5412
ISSN	2391-5412
DOI	10.1515/biol-2018-0005
Database	NAL-Catalogue (AGRICOLA)

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Article: A Combined Phytochemistry and Network Pharmacology Approach to Reveal the Effective Substances and Mechanisms of Wei-Fu-Chun Tablet in the Treatment of Precancerous Lesions of Gastric Cancer.

Wang, Huijun / Wu, Ruoming / Xie, Dong / Ding, Liqin / Lv, Xing / Bian, Yanqin / Chen, Xi / Nisma Lena, Bahaji Azami / Wang, Shunchun / Li, Kun / Chen, Wei / Ye, Guan / Sun, Mingyu

Frontiers in pharmacology

2020 Volume 11, Page(s) 558471

Abstract: Wei-Fu-Chun (WFC) tablet is a commercial medicinal product approved by China ...

Abstract	Wei-Fu-Chun (WFC) tablet is a commercial medicinal product approved by China Food and Drug Administration, which is made of
Language	English
Publishing date	2020-11-18
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2587355-6
ISSN	1663-9812
ISSN	1663-9812
DOI	10.3389/fphar.2020.558471
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Effect of different drying techniques on structural characteristics and bioactivities of polysaccharides extracted from (Lithocarpus litseifolius [Hance] Chun) sweet tea leaves

Kwok, Woon / Fu, Meng-Xi / Zhao, Yun-Xuan / Wu, Ding-Tao / Liu, Hong-Yan / Li, Hua-Bin / Ayyash, Mutamed / Gan, Ren-You

Food Measure. 2022 Oct., v. 16, no. 5 p.4050-4063

2022

Abstract: Sweet tea is made from the leaves of Lithocarpus litseifolius (Hance) Chun, which is an herbal tea ...

Abstract	Sweet tea is made from the leaves of Lithocarpus litseifolius (Hance) Chun, which is an herbal tea widely consumed in Chinese folk. In this study, five drying techniques were applied to dry sweet tea leaves, and the structural characteristics, antioxidant activities, α-glucosidase inhibitory activities, and antiglycation activities of sweet tea polysaccharides (STPs) were systematically evaluated. The extraction yields of STPs ranged from 2.37 to 4.09%, and STPs prepared by hot-air drying had the highest extraction yield. The five polysaccharides exhibited the same constituent monosaccharides, similar preliminary structural characteristics, different molecular weights (Mw), and different molar ratios of constituent monosaccharides. Critically, five STPs solutions exhibited non-Newtonian behavior, and STPs obtained by hot-air drying had the highest Mw and apparent viscosity. Compared with other drying technologies, relatively high total phenolic content was measured in the STPs obtained by freeze-drying (31.32 ± 1.77 mg GAE/g) and hot-air drying (29.13 ± 1.36 mg GAE/g). Furthermore, five STPs exhibited excellent biological properties, including antioxidant activities, α-glucosidase inhibitory activities, and antiglycation activities. Ultimately, the heat map analysis found that the bioactivities of STPs were related to their high Mw and high content of total phenolic. All results suggested that STPs, especially polysaccharides prepared by hot-air drying and freeze-drying, had good development prospects and application values as functional ingredients for the antidiabetic functional food development.
Keywords	Lithocarpus ; antioxidants ; freeze drying ; functional foods ; heat ; herbal tea ; polysaccharides ; viscosity
Language	English
Dates of publication	2022-10
Size	p. 4050-4063.
Publishing place	Springer US
Document type	Article ; Online
ZDB-ID	2754612-3
ISSN	2193-4134 ; 2193-4126
ISSN (online)	2193-4134
ISSN	2193-4126
DOI	10.1007/s11694-022-01510-2
Database	NAL-Catalogue (AGRICOLA)

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Article: Screening and process optimization of ultrasound-assisted extraction of main antioxidants from sweet tea (Lithocarpus litseifolius [Hance] Chun)

Liu, Yi / Liu, Hong-Yan / Xia, Yu / Guo, Huan / He, Xiao-Qin / Li, Hang / Wu, Ding-Tao / Geng, Fang / Lin, Fang-Jun / Li, Hua-Bin / Zhuang, Qi-Guo / Gan, Ren-You

Food bioscience. 2021 Oct., v. 43

2021

Abstract: Sweet tea (Lithocarpus litseifolius [Hance] Chun) is an herbal tea with multiple health benefits ...

Abstract	Sweet tea (Lithocarpus litseifolius [Hance] Chun) is an herbal tea with multiple health benefits due to its main bioactive compounds. In this work, the DPPH-spiking test based on high-performance liquid chromatography (DPPH-spiking HPLC) was applied to precisely screen antioxidants from sweet tea. Three main antioxidants, including isoquercitrin, phloridzin, and trilobatin, were screened out from sweet tea. Furthermore, their antioxidant capacities were verified by the DPPH radical scavenging assay, and found their antioxidant capacities in the order of isoquercitrin > trilobatin > phloridzin. Ultrasonic-assisted extraction (UAE) was applied to optimize and extract the screened antioxidants, and the optimal extraction conditions were ethanol concentration of 69.0%, sample-to-liquid ratio of 18.0 w/v, extraction time of 18.4 min, extraction temperature of 25 °C, and ultrasonic power of 450 W, yielding 17.1 ± 1.26 mg/g isoquercitrin, 34.8 ± 1.49 mg/g phloridzin, and 163 ± 1.73 mg/g trilobatin. The antioxidant capacities of the extracts based on UAE (11.5 ± 0.04 mg ascorbic acid equivalent/g DW) was much higher than the extracts based on maceration extraction (7.9 mg ± 0.02 ascorbic acid equivalent/g DW). Moreover, it was found that trilobatin, isoquercitrin, and phloridzin accounted for 30.9%, 24.9%, and 5.33% of the total antioxidant capacities of the extracts under the optimal extraction conditions, respectively. Therefore, DPPH-spiking HPLC analysis combined with UAE is an effective method for the screening and extracting of the antioxidants in sweet tea, which should have potential applications in the development of functional foods.
Keywords	Lithocarpus ; antioxidants ; ascorbic acid ; ethanol ; herbal tea ; high performance liquid chromatography ; isoquercitrin ; maceration ; phloridzin ; temperature ; ultrasonic treatment ; ultrasonics
Language	English
Dates of publication	2021-10
Publishing place	Elsevier Ltd
Document type	Article
ISSN	2212-4292
DOI	10.1016/j.fbio.2021.101277
Database	NAL-Catalogue (AGRICOLA)

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