1
|
Wilkinson C, Brooks J, Stander MA, Malgas R, Roodt-Wilding R, Makunga NP. Metabolomic profiling of wild rooibos (Aspalathus linearis) ecotypes and their antioxidant-derived phytopharmaceutical potential. Metabolomics 2024; 20:45. [PMID: 38615312 PMCID: PMC11016507 DOI: 10.1007/s11306-024-02103-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Accepted: 02/16/2024] [Indexed: 04/15/2024]
Abstract
INTRODUCTION Aspalathus linearis (commonly known as rooibos) is endemic to the Cape Floristic Region of South Africa and is a popular herbal drink and skin phytotherapeutic ingredient, with health benefits derived primarily from its unique phenolic content. Several, seemingly habitat-specific ecotypes from the Cederberg (Western Cape) and Northern Cape have morphological, ecological, genetic and biochemical differences. OBJECTIVES AND METHODS Despite the commercial popularity of the cultivated variety, the uncultivated ecotypes are largely understudied. To address gaps in knowledge about the biochemical constituency, ultra-performance liquid chromatography-mass spectrometry analysis of fifteen populations was performed, enabling high-throughput metabolomic fingerprinting of 50% (v/v) methanolic extracts. Antioxidant screening of selected populations was performed via three assays and antimicrobial activity on two microbial species was assessed. The metabolomic results were corroborated with total phenolic and flavonoid screening of the extracts. RESULTS AND DISCUSSION Site-specific chemical lineages of rooibos ecotypes were confirmed via multivariate data analyses. Important features identified via PLS-DA disclosed higher relative abundances of certain tentative metabolites (e.g., rutin, aspalathin and apiin) present in the Dobbelaarskop, Blomfontein, Welbedacht and Eselbank sites, in comparison to other locations. Several unknown novel metabolites (e.g., m/z 155.0369, 231.0513, 443.1197, 695.2883) are responsible for metabolomic separation of the populations, four of which showed higher amounts of key metabolites and were thus selected for bioactivity analysis. The Welbedacht and Eselbank site 2 populations consistently displayed higher antioxidant activities, with 2,2-azino-bis (3-ethylbenzothiazoline-6-sulphonic acid) (ABTS) radical scavenging activities of 679.894 ± 3.427 µmol Trolox/g dry matter and 635.066 ± 5.140 µmol Trolox/g dry matter, respectively, in correlation with a high number of phenolic and flavonoid compounds. The contribution of the individual metabolites to the pharmacological effectiveness of rooibos remains unknown and as such, further structural elucidation and phytopharmacological testing is thus urgently needed.
Collapse
Affiliation(s)
- C Wilkinson
- Department of Botany and Zoology, Stellenbosch University, Private Bag X1, Matieland, 7600, South Africa
| | - J Brooks
- Department of Botany and Zoology, Stellenbosch University, Private Bag X1, Matieland, 7600, South Africa
| | - M A Stander
- Department of Biochemistry, and Mass Spectrometry Unit, Central Analytical Facility, Stellenbosch University, Private Bag X1, Matieland, 7600, South Africa
| | - R Malgas
- Department of Conservation Ecology and Entomology, Stellenbosch University, Private Bag X1, Matieland, 7600, South Africa
| | - R Roodt-Wilding
- Department of Genetics, Stellenbosch University, Private Bag X1, Matieland, 7600, South Africa
| | - N P Makunga
- Department of Botany and Zoology, Stellenbosch University, Private Bag X1, Matieland, 7600, South Africa.
| |
Collapse
|
2
|
Ajuwon OR, Adeleke TA, Ajiboye BO, Lawal AO, Folorunso I, Brai B, Bamisaye FA, Falode JA, Odoh IM, Adegbite KI, Adegoke OB. Fermented Rooibos tea (Aspalathus linearis) Ameliorates Sodium Fluoride-Induced Cardiorenal Toxicity, Oxidative Stress, and Inflammation via Modulation of NF-κB/IκB/IκKB Signaling Pathway in Wistar Rats. Cardiovasc Toxicol 2024; 24:240-257. [PMID: 38315346 DOI: 10.1007/s12012-024-09826-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Accepted: 01/05/2024] [Indexed: 02/07/2024]
Abstract
High dose of fluoride intake is associated with toxic effects on kidney and cardiac tissues. This study evaluated the potential protective effect of fermented rooibos tea (RTE) on sodium fluoride (NaF)-induced cardiorenal toxicity in rats. Male Wistar rats (n = 56) were randomly allocated into one of seven equal groups: control, NaF (100 mg/kg orally), NaF + RTE (2%, w/v), NaF + RTE (4%, w/v), NaF + lisinopril (10 mg/kg orally), 2% RTE, and 4% RTE. The experiment lasted for 14 days and RTE was administered to the rats as their sole source of drinking fluid. NaF induced cardiorenal toxicity indicated by elevated level of urea, creatinine, LDH, creatinine kinase-MB, and cardiac troponin I in the serum, accompanied by altered histopathology of the kidney and heart. Furthermore, levels of H2O2, malondialdehyde, and NO were elevated, while GSH level was depleted in the kidney and heart due to NaF intoxication. Protein levels of c-reactive protein, TNFα, IL-1B, and NF-κB were increased by NaF in the serum, kidney, and heart. RTE at 2% and 4% (w/v) reversed cardiorenal toxicity, resolved histopathological impairment, attenuated oxidative stress and inhibited formation of pro-inflammatory markers. RTE at both concentrations down-regulates the mRNA expression of NF-κB, and upregulates the mRNA expression of both IκB and IκKB, thus blocking the activation of NF-κB signaling pathway. Taken together, these results clearly suggest that the protective potential of rooibos tea against NaF-induced cardiorenal toxicity, oxidative stress, and inflammation may be associated with the modulation of the NF-κB signaling pathway.
Collapse
Affiliation(s)
- Olawale Razaq Ajuwon
- Department of Biochemistry, Federal University, Oye-Ekiti, Oye-Are Road, P.M.B. 373, Oye-Ekiti, 371104, Ekiti State, Nigeria.
| | - Toyosi Abiodun Adeleke
- Department of Biochemistry, Federal University, Oye-Ekiti, Oye-Are Road, P.M.B. 373, Oye-Ekiti, 371104, Ekiti State, Nigeria
| | - Basiru Olaitan Ajiboye
- Department of Biochemistry, Federal University, Oye-Ekiti, Oye-Are Road, P.M.B. 373, Oye-Ekiti, 371104, Ekiti State, Nigeria
| | - Akeem Olalekan Lawal
- Department of Biochemistry, Federal University of Technology, Akure, P.M.B. 704, Akure, Ondo State, Nigeria
| | - Ibukun Folorunso
- Department of Biochemistry, Federal University of Technology, Akure, P.M.B. 704, Akure, Ondo State, Nigeria
| | - Bartholomew Brai
- Department of Biochemistry, Federal University, Oye-Ekiti, Oye-Are Road, P.M.B. 373, Oye-Ekiti, 371104, Ekiti State, Nigeria
| | - Fisayo Abraham Bamisaye
- Department of Biochemistry, Federal University, Oye-Ekiti, Oye-Are Road, P.M.B. 373, Oye-Ekiti, 371104, Ekiti State, Nigeria
| | - John Adeolu Falode
- Department of Biochemistry, Federal University, Oye-Ekiti, Oye-Are Road, P.M.B. 373, Oye-Ekiti, 371104, Ekiti State, Nigeria
| | - Ikenna Maximillian Odoh
- Department of Biochemistry, Federal University, Oye-Ekiti, Oye-Are Road, P.M.B. 373, Oye-Ekiti, 371104, Ekiti State, Nigeria
- Medical Center, Federal University, Oye-Ekiti, Oye-Are Road, P.M.B. 373, Oye-Ekiti, 371104, Ekiti State, Nigeria
| | - Kabirat Iyabode Adegbite
- Department of Environmental Health Science, College of Basic Medical and Health Sciences, Fountain University, Osogbo, P.M.B. 4491, Osogbo, Osun State, Nigeria
| | | |
Collapse
|
3
|
Yan Z, Li Y, Lin A, Yang X, Lu Z, Zhang H, Tang J, Zhao J, Niu D, Zhang T, Zhao X, Li K. Development of a trace quantitative method to investigate caffeine distribution in the Yellow and Bohai Seas, China, and assessment of its potential neurotoxic effect on fish larvae. MARINE POLLUTION BULLETIN 2023; 195:115492. [PMID: 37690407 DOI: 10.1016/j.marpolbul.2023.115492] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Revised: 08/30/2023] [Accepted: 09/02/2023] [Indexed: 09/12/2023]
Abstract
Caffeine is an emerging contaminant in aquatic environments. The study utilized a validated method to investigate the presence and distribution of caffeine in the surface water of the Yellow and Bohai Seas, urban rivers, and the Yantai estuary area. The analytical method conforms to EPA guidelines and exhibits a limit of quantification that is 200 times lower than that of prior investigations. The study revealed that the highest concentration of 1436.4 ng/L was found in convergence of ocean currents in the Yellow and Bohai Seas. The presence of larger populations and the process of urban industrialization have been observed to result in elevated levels of caffeine in offshore regions, confirming that caffeine can serve as a potential indicator of anthropogenic contamination. Fish larvae exhibited hypoactivity in response to caffeine exposure at environmentally relevant concentrations. The study revealed that caffeine pollution can have adverse effects on marine and offshore ecosystems. This emphasizes the importance of decreasing neurotoxic pollution in the aquatic environment.
Collapse
Affiliation(s)
- Zhi Yan
- School of Ocean, Yantai University, Yantai 264005, China; Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China
| | - Yaxi Li
- Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Ainuo Lin
- Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiao Yang
- Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zhen Lu
- Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China
| | - Huilin Zhang
- Center for Mitochondria and Healthy Aging, College of Life Science, Yantai University, Yantai 264005, China
| | - Jianhui Tang
- Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China
| | - Jianmin Zhao
- Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China
| | - Donglei Niu
- Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Tianyu Zhang
- Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiaodong Zhao
- School of Ocean, Yantai University, Yantai 264005, China
| | - Ke Li
- Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China.
| |
Collapse
|
4
|
Hibiscus, Rooibos, and Yerba Mate for Healthy Aging: A Review on the Attenuation of In Vitro and In Vivo Markers Related to Oxidative Stress, Glycoxidation, and Neurodegeneration. Foods 2022; 11:foods11121676. [PMID: 35741873 PMCID: PMC9222775 DOI: 10.3390/foods11121676] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Revised: 06/04/2022] [Accepted: 06/05/2022] [Indexed: 02/01/2023] Open
Abstract
The world is currently undergoing a demographic change towards an increasing number of elderly citizens. Aging is characterized by a temporal decline in physiological capacity, and oxidative stress is a hallmark of aging and age-related disorders. Such an oxidative state is linked to a decrease in the effective mechanisms of cellular repair, the incidence of post-translational protein glycation, mitochondrial dysfunction, and neurodegeneration, just to name some of the markers contributing to the establishment of age-related reduction-oxidation, or redox, imbalance. Currently, there are no prescribed therapies to control oxidative stress; however, there are strategies to elevate antioxidant defenses and overcome related health challenges based on the adoption of nutritional therapies. It is well known that herbal teas such, as hibiscus, rooibos, and yerba mate, are important sources of antioxidants, able to prevent some oxidation-related stresses. These plants produce several bioactive metabolites, have a pleasant taste, and a long-lasting history as safe foods. This paper reviews the literature on hibiscus, rooibos, and yerba mate teas in the context of nutritional strategies for the attenuation of oxidative stress-related glycoxidation and neurodegeneration, and, here, Alzheimer’s Disease is approached as an example. The focus is given to mechanisms of glycation inhibition, as well as neuroprotective in vitro effects, and, in animal studies, to frame interest in these plants as nutraceutical agents related to current health concerns.
Collapse
|
5
|
Masike K, de Villiers A, de Beer D, Joubert E, Stander MA. Application of direct injection-ion mobility spectrometry-mass spectrometry (DI-IMS-MS) for the analysis of phenolics in honeybush and rooibos tea samples. J Food Compost Anal 2022. [DOI: 10.1016/j.jfca.2021.104308] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
|
6
|
Miller N, Petrus A, Moelich EI, Muller M, de Beer D, van der Rijst M, Joubert E. Heat treatment improves the sensory properties of the ultrafiltration by-product of honeybush (Cyclopia genistoides) extract. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2022; 102:1047-1055. [PMID: 34312869 DOI: 10.1002/jsfa.11440] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Revised: 05/12/2021] [Accepted: 07/27/2021] [Indexed: 06/13/2023]
Abstract
BACKGROUND Ultrafiltration of green honeybush (Cyclopia genistoides) extract results in a by-product (retentate). Application of further separation processes for recovery of polyphenols would entail creation of additional waste. Repurposing the retentate as a food flavour ingredient provides an alternative valorization approach. RESULTS The retentate, suspended in water (270 g L-1 ), was heat-treated at 80 °C for 2, 4, 8 and 16 h, and at 90 °C for 2, 4, 6 and 8 h to change its sensory profile. The heat-treated retentate, diluted to beverage strength (2.15 g L-1 ), had prominent 'grape/Muscat-like' and 'marmalade/citrus' aroma and flavour notes. Overall, heating for ≤ 4 h increased the intensities of positive flavour and aroma notes, while reducing those of 'green/grass', 'hay' and bitterness, whereafter further heating only had a slight effect on the aroma profile at 80 °C (P < 0.05), but not at 90 °C (P ≥ 0.05). The heat treatments, 80 °C/4 h and 90 °C/4 h, were subsequently applied to different batches of retentate (n = 10) to accommodate the effect of natural product variation. Heating at 90 °C produced higher intensities of positive aroma attributes (P < 0.05), but was more detrimental to the phenolic stability, compared to 80 °C. CONCLUSION After heat treatment, the phenolic content of C. genistoides retentate, reconstituted to beverage strength, still fell within the range of a typical 'fermented' (oxidized) honeybush leaf tea infusion. The change in phenolic composition will not diminish the benefit of an improved sensory profile for the retentate by-product through heating. © 2021 Society of Chemical Industry.
Collapse
Affiliation(s)
- Neil Miller
- Department of Food Science, Stellenbosch University, Matieland, South Africa
- Plant Bioactives Group, Post-Harvest & Agro-Processing Technologies, Agricultural Research Council (ARC), Infruitec-Nietvoorbij, Stellenbosch, South Africa
| | - Alicia Petrus
- Department of Food Science, Stellenbosch University, Matieland, South Africa
- Plant Bioactives Group, Post-Harvest & Agro-Processing Technologies, Agricultural Research Council (ARC), Infruitec-Nietvoorbij, Stellenbosch, South Africa
| | | | - Magdalena Muller
- Department of Food Science, Stellenbosch University, Matieland, South Africa
| | - Dalene de Beer
- Department of Food Science, Stellenbosch University, Matieland, South Africa
- Plant Bioactives Group, Post-Harvest & Agro-Processing Technologies, Agricultural Research Council (ARC), Infruitec-Nietvoorbij, Stellenbosch, South Africa
| | - Marieta van der Rijst
- Biometry Unit, Agricultural Research Council (ARC), Infruitec-Nietvoorbij, Stellenbosch, South Africa
| | - Elizabeth Joubert
- Department of Food Science, Stellenbosch University, Matieland, South Africa
- Plant Bioactives Group, Post-Harvest & Agro-Processing Technologies, Agricultural Research Council (ARC), Infruitec-Nietvoorbij, Stellenbosch, South Africa
| |
Collapse
|
7
|
Brooks J, Makunga NP, Hull KL, Brink-Hull M, Malgas R, Roodt-Wilding R. Resprouters Versus Reseeders: Are Wild Rooibos Ecotypes Genetically Distinct? Front Genet 2021; 12:761988. [PMID: 34987548 PMCID: PMC8721207 DOI: 10.3389/fgene.2021.761988] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Accepted: 10/27/2021] [Indexed: 11/18/2022] Open
Abstract
Aspalathus linearis (Burm. F.) R. Dahlgren (Fabaceae) or rooibos, is a strict endemic species, limited to areas of the Cederberg (Western Cape) and the southern Bokkeveld plateau (Northern Cape) in the greater Cape Floristic Region (CFR) of South Africa. Wild rooibos, unlike the cultivated type, is variable in morphology, biochemistry, ecology and genetics, and these ecotypes are broadly distinguished into two main groups, namely, reseeders and resprouters, based on their fire-survival strategy. No previous assessment of genetic diversity or population structure using microsatellite markers has been conducted in A. linearis. This study aimed to test the hypothesis that wild rooibos ecotypes are distinct in genetic variability and that the ecotypes found in the Northern Cape are differentiated from those in the Cederberg that may be linked to a fire-survival strategy as well as distinct morphological and phytochemical differences. A phylogeographical and population genetic analyses of both chloroplast (trnLF intergenic region) and newly developed species-specific nuclear markers (microsatellites) was performed on six geographically representative wild rooibos populations. From the diversity indices, it was evident that the wild rooibos populations have low-to-moderate genetic diversity (He: 0.618-0.723; Ho: 0.528-0.704). The Jamaka population (Cederberg, Western Cape) had the lowest haplotype diversity (H = 0.286), and the lowest nucleotide diversity (π = 0.006) even though the data revealed large variations in haplotype diversity (h = 0.286-0.900) and nucleotide diversity (π = 0.006-0.025) between populations and amongst regions where wild rooibos populations are found. Our data suggests that populations of rooibos become less diverse from the Melkkraal population (Suid Bokkeveld, Northern Cape) down towards the Cederberg (Western Cape) populations, possibly indicative of clinal variation. The largest genetic differentiation was between Heuningvlei (Cederberg, Western Cape) and Jamaka (FST = 0.101) localities within the Cederberg mountainous region, and, Blomfontein (Northern Cape) and Jamaka (Cederberg) (FST = 0.101). There was also a significant isolation by distance (R2 = 0.296, p = 0.044). The presence of three main clusters is also clearly reflected in the discriminant analysis of principal components (DAPC) based on the microsatellite marker analyses. The correct and appropriate management of wild genetic resources of the species is urgently needed, considering that the wild Cederberg populations are genetically distinct from the wild Northern Cape plants and are delineated in accordance with ecological functional traits of reseeding or resprouting, respectively. The haplotype divergence of the ecotypes has also provided insights into the genetic history of these populations and highlighted the need for the establishment of appropriate conservation strategies for the protection of wild ecotypes.
Collapse
Affiliation(s)
- J. Brooks
- Department of Botany and Zoology, Stellenbosch University, Matieland, South Africa
| | - N. P. Makunga
- Department of Botany and Zoology, Stellenbosch University, Matieland, South Africa
| | - K. L. Hull
- Department of Genetics, Stellenbosch University, Matieland, South Africa
| | - M. Brink-Hull
- Department of Genetics, Stellenbosch University, Matieland, South Africa
| | - R. Malgas
- Department of Conservation Ecology and Entomology, Stellenbosch University, Matieland, South Africa
| | - R. Roodt-Wilding
- Department of Genetics, Stellenbosch University, Matieland, South Africa
| |
Collapse
|
8
|
Areo OM, Njobeh PB. Risk assessment of heavy metals in rooibos (Aspalathus linearis) tea consumed in South Africa. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:59687-59695. [PMID: 34145539 DOI: 10.1007/s11356-021-14968-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Accepted: 06/14/2021] [Indexed: 06/12/2023]
Abstract
A total of 80 rooibos tea samples from a range of brands were purchased from various registered retail shops in South Africa. The samples were bought during 2019 winter (40) and summer (40) period which are classified as 6 natural rooibos, 18 herbal rooibos samples, and 16 flavor rooibos samples and subjected for heavy metal analysis such as chromium (Cr), iron (Fe), arsenic (As), cadmium (Cd), and lead (Pb) using inductively coupled plasma mass spectrometer (ICP-MS). Human health risks were determined by estimating the daily intake non-cancer hazard quotient (THQ) and hazard index (HI) via oral exposure to toxic elements based on daily tea consumption. The concentration range of the determined heavy metals in rooibos tea samples were as follows: Cr (0.17-11.98 mg/kg), Fe (31-450 mg/kg), As (ND-0.51 mg/kg), Cd (0.09-0.17 mg/kg), and Pb (0.06-2.73 mg/kg). Cr was found in higher amount when compared to the World Health Organization (WHO) permissive limit (1.3 mg/kg). The concentrations of all studied heavy metals during winter and summer period were compared using two-way Anova, and no significant differences (p = 0.832) were observed for the two seasons. Both the target risk quotient (THQ) and the hazard index (HI) levels in all analyzed tea were well below 1, implying that intake of rooibos tea with analyzed heavy metals should not cause a threat to human health. On the other hand, the continuous intake due to the high concentrations of trace metals such as Cr may pose a serious chronic health risk due to accumulation in body tissues over time. The study, therefore, suggests constant monitoring of these heavy metals in teas in order to limit the risk of exceeding the permissive limits.
Collapse
Affiliation(s)
- Oluwaseun Mary Areo
- Department of Biotechnology and Food Technology, Faculty of Science, University of Johannesburg, Doornfontein Campus, P.O. Box 17011, Doornfontein, Gauteng, 2028, South Africa
| | - Patrick Berka Njobeh
- Department of Biotechnology and Food Technology, Faculty of Science, University of Johannesburg, Doornfontein Campus, P.O. Box 17011, Doornfontein, Gauteng, 2028, South Africa.
| |
Collapse
|
9
|
Zawisza B, Musielak M, de Beer D, Joubert E, Walczak B. Non-destructive elemental analysis of herbal teas from South Africa. J Food Compost Anal 2021. [DOI: 10.1016/j.jfca.2021.104041] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
|
10
|
Han TU, Kim J, Kim K. Accelerated chromate reduction by tea waste: Comparison of chromate reduction properties between water and ice systems. ENVIRONMENTAL RESEARCH 2021; 197:111059. [PMID: 33766568 DOI: 10.1016/j.envres.2021.111059] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Revised: 03/11/2021] [Accepted: 03/17/2021] [Indexed: 06/12/2023]
Abstract
The concentration of chromium (Cr) in natural water and soil environments has gradually increased in recent decades, owing to intensive use of Cr in industry and its subsequent disposal. In this study, we performed a comparison study on chromate (Cr6+) reduction by tea waste (green tea, black tea, red tea, and chamomile) in water (25 °C) and ice (-20 °C) to develop a new strategy for environmental-friendly stabilization of hazardous Cr6+ by freezing. This study shows that the freezing process can enhance the reduction of Cr6+ by tea waste. The residual Cr6+ concentration ratios (C/C0, where C is the concentration of Cr6+ after the reaction (5 h) and C0 is the initial concentration of Cr6+ (20 μM) in the system) by tea wastes in water were in the range of 0.71 (green tea) to 0.92 (chamomile); however, the ratios dramatically decreased under the freezing process (i.e., 0.06 by green tea, 0.13 by black tea, 0.18 by red tea, and 0.08 by chamomile). According to the results obtained from the fluorescent, chromatographic, and spectroscopic analyses, under the freezing process, the enhanced reduction of Cr6+ could be explained by the freeze concentration of Cr6+, phenolic components in tea extracts, and protons in small liquid pockets in liquid-like layers (LLLs). In addition, the proposed system can efficiently purify the real Cr6+-containing wastewater (i.e., electroplating wastewater), indicating that the system will be economically feasible in cold regions (i.e., polar regions).
Collapse
Affiliation(s)
- Tae Uk Han
- Korea Polar Research Institute (KOPRI), Incheon 21990, Republic of Korea
| | - Jungwon Kim
- Department of Environmental Sciences and Biotechnology, Hallym University, Chuncheon, Gangwon-do 24252, Republic of Korea
| | - Kitae Kim
- Korea Polar Research Institute (KOPRI), Incheon 21990, Republic of Korea; Department of Polar Sciences, University of Science and Technology (UST), Incheon 21990, Republic of Korea.
| |
Collapse
|
11
|
Song NE, Kim MK, Lee KG, Jang HW. Analysis of volatile compounds in rooibos tea (Aspalathus linearis) using different extraction methods and their relationship with human sensory perception. Food Res Int 2021; 141:109942. [PMID: 33641948 DOI: 10.1016/j.foodres.2020.109942] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Revised: 11/06/2020] [Accepted: 11/27/2020] [Indexed: 10/22/2022]
Abstract
This study aimed to comparatively analyze the volatile flavor of rooibos tea (Aspalathus linearis) obtained by two commonly used flavor extraction methods, simultaneous distillation-extraction (SDE) and steam distillation under reduced pressure (DRP). The tea obtained by the two extraction methods, were analyzed by gas chromatography-mass spectrometry to identify volatile aroma-related compounds. Descriptive sensory analysis of the extracted rooibos tea flavor was carried out by a trained panel (n = 7). Fifty volatile compounds were identified, including 26 and 25 aroma-active compounds by SDE (45.9 µg/g) and DRP (37.5 µg/g), respectively. SDE recovered larger quantities of alcohols, acids, and esters, whereas DRP was useful for analyzing thermally unstable volatile compounds, including various alcohols, aldehydes, and hydrocarbons. Descriptive sensory analysis revealed that ketones and phenolic compounds may be responsible for the sensory attributes woody and grassy green, whereas the aldehydes and acidic compounds may contribute to floral and fruity.
Collapse
Affiliation(s)
- Nho-Eul Song
- Korea Food Research Institute, 245 Nongsaengmyeong-ro, Iseo-myeon, Wanju-Gun, Jeollabuk-do 55365, Republic of Korea
| | - Mina K Kim
- Department of Food Science and Human Nutrition and Fermented Food Research Center, Jeonbuk National University, 567 Baekjedaero, Deokjin-gu, Jeonju-si, Jeonbuk 54896, Republic of Korea
| | - Kwang-Geun Lee
- Department of Food Science and Biotechnology, Dongguk University-Seoul, 32, Dongguk-ro, Ilsandong-gu, Goyang-si, Gyeonggi-do 10326, Republic of Korea
| | - Hae Won Jang
- Korea Food Research Institute, 245 Nongsaengmyeong-ro, Iseo-myeon, Wanju-Gun, Jeollabuk-do 55365, Republic of Korea; Department of Food Science and Biotechnology, Sungshin Women's University, 55, Dobong-ro 76 ga-gil, Gangbuk-gu, Seoul 01133, Republic of Korea.
| |
Collapse
|
12
|
Sheik Abdul N, Marnewick JL. Fumonisin B 1 -induced mitochondrial toxicity and hepatoprotective potential of rooibos: An update. J Appl Toxicol 2020; 40:1602-1613. [PMID: 32667064 DOI: 10.1002/jat.4036] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Revised: 05/27/2020] [Accepted: 06/23/2020] [Indexed: 12/18/2022]
Abstract
Fumonisins are a family of potentially carcinogenic mycotoxins produced by Fusarium verticillioides. Several fumonisins have been identified with fumonisin B1 (FB1 ) being the most toxic. The canonical mechanism of FB1 toxicity is centered on its structural resemblance with sphinganine and consequent competitive inhibition of ceramide synthase and disruption of lipidomic profiles. Recent and emerging evidence at the molecular level has identified the disruption of mitochondria and excessive generation of toxic reactive oxygen species (ROS) as alternative/additional mechanisms of toxicity. The understanding of how these pathways contribute to FB1 toxicity can lead to the identification of novel, effective approaches to protecting vulnerable populations. Natural compounds with antioxidant properties seem to protect against the induced toxic effects of FB1 . Rooibos (Aspalathus linearis), endemic to South Africa, has traditionally been used as a medicinal herbal tea with strong scientific evidence supporting its anecdotal claims. The unique composition of phytochemicals and combination of metabolic activators, adaptogens and antioxidants make rooibos an attractive yet underappreciated intervention for FB1 toxicoses. In the search for a means to address FB1 toxicoses as a food safety problem in developing countries, phytomedicine and traditional knowledge systems must play an integral part. This review aims to summarize the growing body of evidence succinctly, which highlights mitochondrial dysfunction as a secondary toxic effect responsible for the FB1 -induced generation of ROS. We further propose the potential of rooibos to combat this induced toxicity based on its integrated bioactive properties, as a socio-economically viable strategy to prevent and/or repair cellular damage caused by FB1 .
Collapse
Affiliation(s)
- Naeem Sheik Abdul
- Applied Microbial and Health Biotechnology Institute, Cape Peninsula University of Technology, Bellville, South Africa
| | - Jeanine L Marnewick
- Applied Microbial and Health Biotechnology Institute, Cape Peninsula University of Technology, Bellville, South Africa
| |
Collapse
|
13
|
Jack BU, Malherbe CJ, Mamushi M, Muller CJF, Joubert E, Louw J, Pheiffer C. Adipose tissue as a possible therapeutic target for polyphenols: A case for Cyclopia extracts as anti-obesity nutraceuticals. Biomed Pharmacother 2019; 120:109439. [PMID: 31590126 DOI: 10.1016/j.biopha.2019.109439] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2019] [Revised: 08/29/2019] [Accepted: 09/06/2019] [Indexed: 02/07/2023] Open
Abstract
Obesity is a significant contributor to increased morbidity and premature mortality due to increasing the risk of many chronic metabolic diseases such as type 2 diabetes, cardiovascular disease and certain types of cancer. Lifestyle modifications such as energy restriction and increased physical activity are highly effective first-line treatment strategies used in the management of obesity. However, adherence to these behavioral changes is poor, with an increased reliance on synthetic drugs, which unfortunately are plagued by adverse effects. The identification of new and safer anti-obesity agents is thus of significant interest. In recent years, plants and their phenolic constituents have attracted increased attention due to their health-promoting properties. Amongst these, Cyclopia, an endemic South African plant commonly consumed as a herbal tea (honeybush), has been shown to possess modulating properties against oxidative stress, hyperglycemia, and obesity. Likewise, several studies have reported that some of the major phenolic compounds present in Cyclopia spp. exhibit anti-obesity effects, particularly by targeting adipose tissue. These phenolic compounds belong to the xanthone, flavonoid and benzophenone classes. The aim of this review is to assess the potential of Cyclopia extracts as an anti-obesity nutraceutical as underpinned by in vitro and in vivo studies and the underlying cellular mechanisms and biological pathways regulated by their phenolic compounds.
Collapse
Affiliation(s)
- Babalwa U Jack
- Biomedical Research and Innovation Platform, South African Medical Research Council, Tygerberg, South Africa.
| | - Christiaan J Malherbe
- Plant Bioactives Group, Post-Harvest and Agro-processing Technologies, Agricultural Research Council, Infruitec-Nietvoorbij, Stellenbosch, South Africa
| | - Mokadi Mamushi
- Biomedical Research and Innovation Platform, South African Medical Research Council, Tygerberg, South Africa; Division of Medical Physiology, Faculty of Medicine and Health Sciences, Stellenbosch University, Tygerberg, South Africa
| | - Christo J F Muller
- Biomedical Research and Innovation Platform, South African Medical Research Council, Tygerberg, South Africa; Division of Medical Physiology, Faculty of Medicine and Health Sciences, Stellenbosch University, Tygerberg, South Africa; Department of Biochemistry and Microbiology, University of Zululand, Kwa-Dlangezwa, South Africa
| | - Elizabeth Joubert
- Plant Bioactives Group, Post-Harvest and Agro-processing Technologies, Agricultural Research Council, Infruitec-Nietvoorbij, Stellenbosch, South Africa; Department of Food Science, Stellenbosch University, Stellenbosch, South Africa
| | - Johan Louw
- Biomedical Research and Innovation Platform, South African Medical Research Council, Tygerberg, South Africa; Department of Biochemistry and Microbiology, University of Zululand, Kwa-Dlangezwa, South Africa
| | - Carmen Pheiffer
- Biomedical Research and Innovation Platform, South African Medical Research Council, Tygerberg, South Africa; Division of Medical Physiology, Faculty of Medicine and Health Sciences, Stellenbosch University, Tygerberg, South Africa
| |
Collapse
|