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Liu Z, Liu X, Ma Z, Guan T. Phytosterols in rice bran and their health benefits. Front Nutr 2023; 10:1287405. [PMID: 37899831 PMCID: PMC10600523 DOI: 10.3389/fnut.2023.1287405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Accepted: 10/02/2023] [Indexed: 10/31/2023] Open
Abstract
With the continuous technological innovation in the high-value utilization of rice bran byproducts, rice bran oil retains a higher concentration of beneficial components such as a well-balanced composition of fatty acids and abundant phytosterols. This makes it a highly nutritious and healthy vegetable oil. This review provides an overview of the advancements made in separating, purifying, and processing phytosterols in rice bran oil. The review also introduces techniques for assessing the stability of rice bran oil. Moreover, the review emphasizes the nutritional value of phytosterols found in rice bran oil, highlighting their various health benefits, including their anticancer, anti-inflammatory, anti-allergic, antibacterial, cholesterol-lowering, skin-protective, anti-obesity, anti-diabetic, neuroprotective, gastroprotective, and immune-enhancing effects. Attaining a comprehensive understanding of the research progress made in phytosterols derived from rice bran oil can offer valuable guidance for the efficient utilization of rice bran.
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Affiliation(s)
- Zhaoguo Liu
- Changchun Institute of Technology, Changchun, China
| | - Xiaoxiao Liu
- School of Food Science and Engineering, Yangzhou University, Yangzhou, China
| | - Zheng Ma
- Department of Thoracic Surgery, Qilu Hospital of Shandong University, Jinan, China
| | - Tianzhu Guan
- School of Food Science and Engineering, Yangzhou University, Yangzhou, China
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Nunes VO, Vanzellotti NDC, Fraga JL, Pessoa FLP, Ferreira TF, Amaral PFF. Biotransformation of Phytosterols into Androstenedione—A Technological Prospecting Study. Molecules 2022; 27:molecules27103164. [PMID: 35630641 PMCID: PMC9147728 DOI: 10.3390/molecules27103164] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Revised: 05/10/2022] [Accepted: 05/13/2022] [Indexed: 02/05/2023] Open
Abstract
Androstenedione (AD) is a key intermediate in the body’s steroid metabolism, used as a precursor for several steroid substances, such as testosterone, estradiol, ethinyl estradiol, testolactone, progesterone, cortisone, cortisol, prednisone, and prednisolone. The world market for AD and ADD (androstadienedione) exceeds 1000 tons per year, which stimulates the pharmaceutical industry’s search for newer and cheaper raw materials to produce steroidal compounds. In light of this interest, we aimed to investigate the progress of AD biosynthesis from phytosterols by prospecting scientific articles (Scopus, Web of Science, and Google Scholar databases) and patents (USPTO database). A wide variety of articles and patents involving AD and phytosterol were found in the last few decades, resulting in 108 relevant articles (from January 2000 to December 2021) and 23 patents of interest (from January 1976 to December 2021). The separation of these documents into macro, meso, and micro categories revealed that most studies (articles) are performed in China (54.8%) and in universities (76%), while patents are mostly granted to United States companies. It also highlights the fact that AD production studies are focused on “process improvement” techniques and on possible modifications of the “microorganism” involved in biosynthesis (64 and 62 documents, respectively). The most-reported “process improvement” technique is “chemical addition” (40%), which means that the addition of solvents, surfactants, cofactors, inducers, ionic liquids, etc., can significantly increase AD production. Microbial genetic modifications stand out in the “microorganism” category because this strategy improves AD yield considerably. These documents also revealed the main aspects of AD and ADD biosynthesis: Mycolicibacterium sp. (basonym: Mycobacterium sp.) (40%) and Mycolicibacterium neoaurum (known previously as Mycobacterium neoaurum) (32%) are the most recurrent species studied. Microbial incubation temperatures can vary from 29 °C to 37 °C; incubation can last from 72 h to 14 days; the mixture is agitated at 140 to 220 rpm; vegetable oils, mainly soybean, can be used as the source of a mixture of phytosterols. In general, the results obtained in the present technological prospecting study are fundamental to mapping the possibilities of AD biosynthesis process optimization, as well as to identifying emerging technologies and methodologies in this scenario.
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Affiliation(s)
- Victor Oliveira Nunes
- By&Bio—By-Products to Bioproducts Lab, Escola de Química, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-909, RJ, Brazil; (V.O.N.); (N.d.C.V.); (J.L.F.); (F.L.P.P.); (T.F.F.)
| | - Nathália de Castro Vanzellotti
- By&Bio—By-Products to Bioproducts Lab, Escola de Química, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-909, RJ, Brazil; (V.O.N.); (N.d.C.V.); (J.L.F.); (F.L.P.P.); (T.F.F.)
| | - Jully Lacerda Fraga
- By&Bio—By-Products to Bioproducts Lab, Escola de Química, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-909, RJ, Brazil; (V.O.N.); (N.d.C.V.); (J.L.F.); (F.L.P.P.); (T.F.F.)
| | - Fernando Luiz Pellegrini Pessoa
- By&Bio—By-Products to Bioproducts Lab, Escola de Química, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-909, RJ, Brazil; (V.O.N.); (N.d.C.V.); (J.L.F.); (F.L.P.P.); (T.F.F.)
- Centro Universitário SENAI CIMATEC, Salvador 41650-010, BA, Brazil
| | - Tatiana Felix Ferreira
- By&Bio—By-Products to Bioproducts Lab, Escola de Química, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-909, RJ, Brazil; (V.O.N.); (N.d.C.V.); (J.L.F.); (F.L.P.P.); (T.F.F.)
| | - Priscilla Filomena Fonseca Amaral
- By&Bio—By-Products to Bioproducts Lab, Escola de Química, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-909, RJ, Brazil; (V.O.N.); (N.d.C.V.); (J.L.F.); (F.L.P.P.); (T.F.F.)
- Correspondence: ; Tel.: +55-21-3938-7623
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Zhao YQ, Liu YJ, Ji WT, Liu K, Gao B, Tao XY, Zhao M, Wang FQ, Wei DZ. One-pot biosynthesis of 7β-hydroxyandrost-4-ene-3,17-dione from phytosterols by cofactor regeneration system in engineered mycolicibacterium neoaurum. Microb Cell Fact 2022; 21:59. [PMID: 35397581 PMCID: PMC8994266 DOI: 10.1186/s12934-022-01786-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Accepted: 03/30/2022] [Indexed: 11/18/2022] Open
Abstract
Background 7β-hydroxylated steroids (7β-OHSt) possess significant activities in anti-inflammatory and neuroprotection, and some of them have been widely used in clinics. However, the production of 7β-OHSt is still a challenge due to the lack of cheap 7β-hydroxy precursor and the difficulty in regio- and stereo-selectively hydroxylation at the inert C7 site of steroids in industry. The conversion of phytosterols by Mycolicibacterium species to the commercial precursor, androst-4-ene-3,17-dione (AD), is one of the basic ways to produce different steroids. This study presents a way to produce a basic 7β-hydroxy precursor, 7β-hydroxyandrost-4-ene-3,17-dione (7β-OH-AD) in Mycolicibacterium, for 7β-OHSt synthesis. Results A mutant of P450-BM3, mP450-BM3, was mutated and engineered into an AD producing strain for the efficient production of 7β-OH-AD. The enzyme activity of mP450-BM3 was then increased by 1.38 times through protein engineering and the yield of 7β-OH-AD was increased from 34.24 mg L− 1 to 66.25 mg L− 1. To further enhance the performance of 7β-OH-AD producing strain, the regeneration of nicotinamide adenine dinucleotide phosphate (NADPH) for the activity of mP450-BM3-0 was optimized by introducing an NAD kinase (NADK) and a glucose-6-phosphate dehydrogenase (G6PDH). Finally, the engineered strain could produce 164.52 mg L− 1 7β-OH-AD in the cofactor recycling and regeneration system. Conclusions This was the first report on the one-pot biosynthesis of 7β-OH-AD from the conversion of cheap phytosterols by an engineered microorganism, and the yield was significantly increased through the mutation of mP450-BM3 combined with overexpression of NADK and G6PDH. The present strategy may be developed as a basic industrial pathway for the commercial production of high value products from cheap raw materials. Supplementary Information The online version contains supplementary material available at 10.1186/s12934-022-01786-5.
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Single step biotransformation of corn oil phytosterols to boldenone by a newly isolated Pseudomonas aeruginosa. ACTA ACUST UNITED AC 2016; 11:36-43. [PMID: 28352538 PMCID: PMC5042298 DOI: 10.1016/j.btre.2016.05.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2016] [Revised: 05/05/2016] [Accepted: 05/05/2016] [Indexed: 11/24/2022]
Abstract
Biotransformation of crude corn oil phytosterols to 4-androstene-3, 17-dione, testosterone and boldenone. Four strains of Pseudomonas aeruginosa and one of Alcaligenes aquatilis were isolated, identified and used in biotransformation process. Determination of crude corn oil total sterols and phytosterols profile. Optimization of boldenone production by Placket-Burman design and box-Behnken design. Accumulation of boldenone (BOL) as the major product of the biotransformation process, and the rare reports about optimization of its production from phytosterols, make it a selected promising candidate for further optimization. The production of BOL in single step microbial biotransformation from corn oil phytosterols by P. aeruginosa was not previously reported.
A new potent Pseudomonas aeruginosa isolate capable for biotransformation of corn oil phytosterol (PS) to 4-androstene-3, 17-dione (AD), testosterone (T) and boldenone (BOL) was identified by phenotypic analysis and 16S rRNA gene sequencing. Sequential statistical strategy was used to optimize the biotransformation process mainly concerning BOL using Factorial design and response surface methodology (RSM). The production of BOL in single step microbial biotransformation from corn oil phytosterols by P. aeruginosa was not previously reported. Results showed that the pH concentration of the medium, (NH4)2SO4 and KH2PO4 were the most significant factors affecting BOL production. By analyzing the statistical model of three-dimensional surface plot, BOL production increased from 36.8% to 42.4% after the first step of optimization, and the overall biotransformation increased to 51.9%. After applying the second step of the sequential statistical strategy BOL production increased to 53.6%, and the overall biotransformation increased to 91.9% using the following optimized medium composition (g/l distilled water) (NH4)2SO4, 2; KH2PO4, 4; Na2HPO4. 1; MgSO4·7H2O, 0.3; NaCl, 0.1; CaCl2·2H2O, 0.1; FeSO4·7H2O, 0.001; ammonium acetate 0.001; Tween 80, 0.05%; corn oil 0.5%; 8-hydroxyquinoline 0.016; pH 8; 200 rpm agitation speed and incubation time 36 h at 30 °C. Validation experiments proved the adequacy and accuracy of model, and the results showed the predicted value agreed well with the experimental values.
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Blackwell BR, Johnson BJ, Buser MD, Cobb GP, Smith PN. Transformation kinetics of trenbolone acetate metabolites and estrogens in urine and feces of implanted steers. CHEMOSPHERE 2015; 138:901-907. [PMID: 25550108 DOI: 10.1016/j.chemosphere.2014.10.091] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2014] [Revised: 10/14/2014] [Accepted: 10/21/2014] [Indexed: 06/04/2023]
Abstract
Biotransformation of trenbolone acetate metabolites and estrogens derived from animal feeding operations in soils, waste storage systems, and in land applied manure has been well characterized. Yet recent data demonstrate potential for steroid transport into the environment directly from feedyard pens via runoff or airborne particulate matter. Therefore, the objective of this study was to determine steroid transformation rates in beef cattle excreta. Feces and urine were collected from steers recently treated with steroidal implants. Excreta were stored and periodically extracted over 112 d then analyzed for trenbolone acetate metabolites and estrogens by liquid chromatography mass spectrometry. Conjugated steroids were present primarily in urine, and conjugates quickly degraded to free steroid with a half-life of 0.6-1.0 d. The primary trenbolone acetate metabolite, 17α-trenbolone, had a half-life of 5.1-9.5 d. Likewise, 17α-estradiol was the predominant estrogen, with a half-life of 8.6-53 d. Secondary trenbolone metabolites formed from 17α-trenbolone biotransformation were observed at low concentrations less than 10% initial 17α-trenbolone concentrations. Estrone was the primary metabolite of 17α-estradiol and concentrations of estrone exceeded initial 17α-estradiol concentration in all sample types. These results suggest manure-borne steroids are more stable in excreta than in soil microcosms.
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Affiliation(s)
- Brett R Blackwell
- Texas Tech University, Department of Environmental Toxicology, 1207 Gilbert Dr, Lubbock, TX, USA
| | - Bradley J Johnson
- Texas Tech University, Department of Animal and Food Sciences, Box 42141, Lubbock, TX, USA
| | - Michael D Buser
- Oklahoma State University, Department of Biosystems and Agricultural Engineering, 111 Agricultural Hall, Stillwater, OK, USA
| | - George P Cobb
- Baylor University, Department of Environmental Science, One Bear Place #97266, Waco, TX, USA
| | - Philip N Smith
- Texas Tech University, Department of Environmental Toxicology, 1207 Gilbert Dr, Lubbock, TX, USA.
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Zheng XX, Chen RS, Shen Y, Yin ZY. Phytosterols elevation in bamboo shoot residue through laboratorial scale solid-state fermentation using isolated Aspergillus niger CTBU. Appl Biochem Biotechnol 2014; 172:4078-83. [PMID: 24610040 DOI: 10.1007/s12010-014-0821-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2012] [Accepted: 12/28/2012] [Indexed: 11/25/2022]
Abstract
Aspergillus niger CTBU isolated from local decayed bamboo shoot residue was employed to solid-state fermentation (SSF) of bamboo shoot residue to elevate the content of phytosterols. Strain acclimatization was carried out under the fermentation condition using bamboo shoot as substrate for fermentation performance improvement. The optimal fermentation temperature and nitrogen level were investigated using acclimatized strain, and SSF was carried out in a 500-ml Erlenmeyer flask feeding 300-mg bamboo shoot residue chips under the optimal condition (33 °C and feeding 4 % urea), and 1,186 mg (100 g)(-1) of total phytosterol was attained after 5-day fermentation, in comparison, only 523 mg (100 g)(-1) of phytosterol was assayed in fresh shoots residue. HPLC analysis of the main composition of total phytosterols displays that the types of phytosterols and composition ratio of main sterols keep steady. This laboratorial scale SSF unit could be scaled up for raw phytosterols production from discarded bamboo shoot residue and could reduce its cost.
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Affiliation(s)
- X X Zheng
- Chongqing Key Lab of Catalysis and Functional Organic Molecules, School of Environmental and Biological Engineering, Chongqing Technology and Business University, Chongqing, 400067, People's Republic of China,
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Donova MV, Egorova OV. Microbial steroid transformations: current state and prospects. Appl Microbiol Biotechnol 2012; 94:1423-47. [PMID: 22562163 DOI: 10.1007/s00253-012-4078-0] [Citation(s) in RCA: 324] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2012] [Revised: 04/03/2012] [Accepted: 04/03/2012] [Indexed: 12/14/2022]
Abstract
Studies of steroid modifications catalyzed by microbial whole cells represent a well-established research area in white biotechnology. Still, advances over the last decade in genetic and metabolic engineering, whole-cell biocatalysis in non-conventional media, and process monitoring raised research in this field to a new level. This review summarizes the data on microbial steroid conversion obtained since 2003. The key reactions of structural steroid functionalization by microorganisms are highlighted including sterol side-chain degradation, hydroxylation at various positions of the steroid core, and redox reactions. We also describe methods for enhancement of bioprocess productivity, selectivity of target reactions, and application of microbial transformations for production of valuable pharmaceutical ingredients and precursors. Challenges and prospects of whole-cell biocatalysis applications in steroid industry are discussed.
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Affiliation(s)
- Marina V Donova
- G.K. Skryabin Institute of Biochemistry and Physiology of Microorganisms, Russian Academy of Sciences, pr. Nauki 5, Pushchino, Moscow Region 142290, Russia.
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