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Chen Y, Yang D, Ouyang N, Lei S, Liu H, Huang Y, Wu J. Optimization of limonin invertase production by scaling up Aspergillus tubingensis UA13 fermentation to a 5-l scale. Lett Appl Microbiol 2023; 76:ovad133. [PMID: 38037435 DOI: 10.1093/lambio/ovad133] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Revised: 11/13/2023] [Accepted: 11/29/2023] [Indexed: 12/02/2023]
Abstract
The enzymatic approach is a highly effective and the major scientific method to eliminating bitter components in citrus-derived products nowadays. Microbial production of limonin invertase stands out due to its pivotal role in the removal of the bitter substance, limonin. The optimization of fermentation parameters and the study of scale-up fermentation are imperative for product commercialization. In this study, we focused on optimizing stirring speed, fermentation temperature, and initial pH to enhance the growth and limonin invertase production by the Aspergillus tabin strain UA13 in a 5-l stirred-tank bioreactor. Our results revealed the following optimal parameters are: a stirring speed of 300 rpm, a fermentation temperature of 35°C and a pH 5.0. Under these optimized conditions, the limonin invertase activity reached its peak at 63.38 U ml-1, representing a 1.67-fold increase compared to the unoptimized conditions (38.10 U ml-1), while also reducing the fermentation duration by 12 h. Furthermore, our research demonstrated that limonin invertase effectively hydrolyze limonin in grapefruit juice, reducing its content from 13.28 to 2.14 μg ml-1, as determined by HPLC, resulting in a 6.21-fold reduction of the bitter substance.
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Affiliation(s)
- Yuting Chen
- College of Biological and Pharmaceutical, China Three Gorges University, Yichang 443002, China
| | - Dandan Yang
- College of Biological and Pharmaceutical, China Three Gorges University, Yichang 443002, China
| | - Nongfei Ouyang
- College of Biological and Pharmaceutical, China Three Gorges University, Yichang 443002, China
| | - Shengjiao Lei
- College of Biological and Pharmaceutical, China Three Gorges University, Yichang 443002, China
- Hubei Key Laboratory of Natural Products Research and Development, China Three Gorges University, Yichang 443002, China
| | - Haiyan Liu
- College of Biological and Pharmaceutical, China Three Gorges University, Yichang 443002, China
| | - Yiwei Huang
- College of Biological and Pharmaceutical, China Three Gorges University, Yichang 443002, China
| | - Junqian Wu
- College of Biological and Pharmaceutical, China Three Gorges University, Yichang 443002, China
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Nomilin from Yuzu Seed Has In Vitro Antioxidant Activity and Downregulates Melanogenesis in B16F10 Melanoma Cells through the PKA/CREB Signaling Pathway. Antioxidants (Basel) 2022; 11:antiox11091636. [PMID: 36139710 PMCID: PMC9495840 DOI: 10.3390/antiox11091636] [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: 07/11/2022] [Revised: 08/11/2022] [Accepted: 08/19/2022] [Indexed: 11/24/2022] Open
Abstract
Yuzu (Citrus junos) is a citrus plant native to Asian countries, including Korea, Japan, and China. Yuzu peel and seed contain abundant vitamin C, citric acid, and polyphenols. Although the antioxidative and antimelanogenic activities of other citrus fruits and yuzu extract have been reported, the tyrosinase inhibitory activity of the limonoid aglycone contained in yuzu seed extract is unknown. We separated yuzu seeds into the husk, shell, and meal and evaluated antioxidant activity of each. The limonoid glucoside fraction of the husk identified nomilin, a novel tyrosinase inhibitor. We performed tyrosinase inhibitory activity and noncompetitive inhibition assays and docking studies to determine nomilin binding sites. Furthermore, we evaluated the antioxidative mechanism and antimelanogenic activity of nomilin in B16F10 melanoma cells. The concentration of nomilin that did not show toxicity was <100 µg/mL. Nomilin suppressed protein expression of TYR, TRP-1, TRP-2, and microphthalmia-associated transcription factor (MITF) in a concentration-dependent manner. Nomilin significantly reduced the levels of p-CREB and p-PKA at the protein level and decreased the levels of skin-whitening-related factors MITF, tyrosinase, TRP-1, and TRP-2 at the mRNA level in a concentration-dependent manner. Thus, nomilin from yuzu seed husk can be used as a skin-whitening agent in cosmetics.
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Kandemir K, Piskin E, Xiao J, Tomas M, Capanoglu E. Fruit Juice Industry Wastes as a Source of Bioactives. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:6805-6832. [PMID: 35544590 PMCID: PMC9204825 DOI: 10.1021/acs.jafc.2c00756] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Revised: 04/06/2022] [Accepted: 04/06/2022] [Indexed: 05/15/2023]
Abstract
Food processing sustainability, as well as waste minimization, are key concerns for the modern food industry. A significant amount of waste is generated by the fruit juice industry each year. In addition to the economic losses caused by the removal of these wastes, its impact on the environment is undeniable. Therefore, researchers have focused on recovering the bioactive components from fruit juice processing, in which a great number of phytochemicals still exist in the agro-industrial wastes, to help minimize the waste burden as well as provide new sources of bioactive compounds, which are believed to be protective agents against certain diseases such as cardiovascular diseases, cancer, and diabetes. Although these wastes contain non-negligible amounts of bioactive compounds, information on the utilization of these byproducts in functional ingredient/food production and their impact on the sensory quality of food products is still scarce. In this regard, this review summarizes the most recent literature on bioactive compounds present in the wastes of apple, citrus fruits, berries, stoned fruits, melons, and tropical fruit juices, together with their extraction techniques and valorization approaches. Besides, on the one hand, examples of different current food applications with the use of these wastes are provided. On the other hand, the challenges with respect to economic, sensory, and safety issues are also discussed.
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Affiliation(s)
- Kevser Kandemir
- Faculty
of Engineering and Natural Sciences, Food Engineering Department, Istanbul Sabahattin Zaim University, Halkali, 34303 Istanbul, Turkey
| | - Elif Piskin
- Faculty
of Engineering and Natural Sciences, Food Engineering Department, Istanbul Sabahattin Zaim University, Halkali, 34303 Istanbul, Turkey
| | - Jianbo Xiao
- Department
of Analytical Chemistry and Food Science, Faculty of Food Science
and Technology, University of Vigo-Ourense
Campus, E-32004 Ourense, Spain
- International
Research Center for Food Nutrition and Safety, Jiangsu University, 212013 Zhenjiang, China
| | - Merve Tomas
- Faculty
of Engineering and Natural Sciences, Food Engineering Department, Istanbul Sabahattin Zaim University, Halkali, 34303 Istanbul, Turkey
| | - Esra Capanoglu
- Department
of Food Engineering, Faculty of Chemical and Metallurgical Engineering, Istanbul Technical University, 34469 Maslak, Istanbul, Turkey
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Saaty AH. Grapefruit Seed Extracts’ Antibacterial and Antiviral Activity: Anti-Severe Acute Respiratory Syndrome Coronavirus 2 Impact. ARCHIVES OF PHARMACY PRACTICE 2022. [DOI: 10.51847/rq6b89xgf9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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Antioxidant Activity of Citrus Limonoids and Investigation of Their Virucidal Potential against SARS-CoV-2 in Cellular Models. Antioxidants (Basel) 2021; 10:antiox10111794. [PMID: 34829666 PMCID: PMC8615075 DOI: 10.3390/antiox10111794] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Revised: 11/04/2021] [Accepted: 11/06/2021] [Indexed: 12/22/2022] Open
Abstract
The COVID-19 pandemic represents an unprecedented global emergency. Despite all efforts, COVID-19 remains a threat to public health, due to the complexity of mass vaccination programs, the lack of effective drugs, and the emergence of new variants. A link has recently been found between the risk of developing a severe COVID-19 infection and a high level of oxidative stress. In this context, we have focused our attention on natural compounds with the aim of finding molecules capable of acting through a dual virucidal–antioxidant mechanism. In particular, we studied the potential of grapefruit seed extracts (GSE) and their main components, belonging to the class of limonoids. Using chemical and biological approaches including isolation and purification of GSE, antioxidant and virucidal assays, we have shown that grapefruit seed constituents, belonging to the class of limonoids, are endowed with remarkable virucidal, antioxidant and mitoprotective activity.
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Bampidis V, Azimonti G, Bastos MDL, Christensen H, Kouba M, Fašmon Durjava M, López‐Alonso M, López Puente S, Marcon F, Mayo B, Pechová A, Petkova M, Ramos F, Sanz Y, Villa RE, Woutersen R, Brantom P, Chesson A, Westendorf J, Manini P, Pizzo F, Dusemund B. Safety and efficacy of a feed additive consisting of an aqueous extract of Citrus limon (L.) Osbeck (lemon extract) for use in all animal species (Nor-Feed SAS). EFSA J 2021; 19:e06893. [PMID: 34765034 PMCID: PMC8573541 DOI: 10.2903/j.efsa.2021.6893] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Following a request from the European Commission, the Panel on Additives and Products or Substances used in Animal Feed (FEEDAP) was asked to deliver a scientific opinion on the safety and efficacy of an aqueous extract of Citrus limon (L.) Osbeck (lemon extract) when used as a sensory additive in feed for all animal species. The FEEDAP Panel concluded that the additive under assessment is safe for all animal species up to the maximum proposed use levels of 1,000 mg/kg complete feed and 250 mg/kg water for drinking. No concerns for consumers were identified following the use of lemon extract up to the highest safe level in feed. The additive should be considered a skin and eye irritant, and a potential corrosive. The use of the extract in animal feed under the proposed conditions was not expected to pose a risk for the environment. Lemon extract was recognised to flavour food. Since its function in feed would be essentially the same as that in food, no further demonstration of efficacy was considered necessary.
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Lu X, Zhao C, Shi H, Liao Y, Xu F, Du H, Xiao H, Zheng J. Nutrients and bioactives in citrus fruits: Different citrus varieties, fruit parts, and growth stages. Crit Rev Food Sci Nutr 2021; 63:2018-2041. [PMID: 34609268 DOI: 10.1080/10408398.2021.1969891] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Citrus fruits are consumed in large quantities worldwide due to their attractive aromas and taste, as well as their high nutritional values and various health-promoting effects, which are due to their abundance of nutrients and bioactives. In addition to water, carbohydrates, vitamins, minerals, and dietary fibers are important nutrients in citrus, providing them with high nutritional values. Citrus fruits are also rich in various bioactives such as flavonoids, essential oils, carotenoids, limonoids, and synephrines, which protect from various ailments, including cancer and inflammatory, digestive, and cardiovascular diseases. The composition and content of nutrients and bioactives differ significantly among citrus varieties, fruit parts, and growth stages. To better understand the nutrient and bioactive profiles of citrus fruits and provide guidance for the utilization of high-value citrus resources, this review systematically summarizes the nutrients and bioactives in citrus fruit, including their contents, structural characteristics, and potential health benefits. We also explore the composition variation in different citrus varieties, fruits parts, and growth stages, as well as their health-promoting effects and applications.
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Affiliation(s)
- Xingmiao Lu
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Chengying Zhao
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Huan Shi
- Department of science and technology catalyze, Nestlé R&D (China) Ltd, Beijing, China
| | - Yongcheng Liao
- Department of science and technology catalyze, Nestlé R&D (China) Ltd, Beijing, China
| | - Fei Xu
- Department of science and technology catalyze, Nestlé R&D (China) Ltd, Beijing, China
| | - Hengjun Du
- Department of Food Science, University of Massachusetts, Amherst, Massachusetts, USA
| | - Hang Xiao
- Department of Food Science, University of Massachusetts, Amherst, Massachusetts, USA
| | - Jinkai Zheng
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing, China
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Huang S, Dong T, Xiong B, Qiu X, Sun G, Liao L, Fan N, Wang X, Deng H, He S, Hu Y, Wang Z. Variation in the content and composition of limonoids in fruits of four pomelo varieties during fruit development: The natural debittering process in pomelo fruits. J Food Compost Anal 2021. [DOI: 10.1016/j.jfca.2021.103928] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Narayanan M, Baskaran D, Sampath V. Experimental design of hydrotropic extraction for recovery of bioactive limonin from lemon (Citrus limon L.) seeds. SEP SCI TECHNOL 2021. [DOI: 10.1080/01496395.2021.1943683] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Meyyappan Narayanan
- Department of Chemical Engineering, Sri Venkateswara College of Engineering, Chennai, India
| | - Divya Baskaran
- Department of Chemical Engineering, Sri Venkateswara College of Engineering, Chennai, India
| | - Vasumathi Sampath
- Department of Chemical Engineering, Sri Venkateswara College of Engineering, Chennai, India
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