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Lv J, Ke S, He X, Zhang B, Zheng Z, Chen P. Research on the Isolation of Endophytic Fungi from Papaya and the Prevention of Colletotrichum gloeosporioides. J Fungi (Basel) 2024; 10:550. [PMID: 39194876 DOI: 10.3390/jof10080550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2024] [Revised: 06/22/2024] [Accepted: 07/03/2024] [Indexed: 08/29/2024] Open
Abstract
Endophytic fungi can be used as a source of herbal antioxidants to overcome the limitations of low yield and lengthy growth cycles associated with using plants as raw materials for antioxidant production. Papaya fruit is often susceptible to infection by Colletotrichum gloeosporioides after harvest, leading to postharvest rot. Endophytic fungi were extracted with ethyl acetate, and the initial screening concentration was 100 mg/L. Seven strains were identified, with scavenging rates exceeding 50% and strong antioxidant activity. The IC50 values in DPPH and ABTS free radical scavenging assays ranged from 19.72 to 84.06 mg/L and from 14.34 to 64.63 mg/L, respectively. Strain Y17 exhibited robust antioxidant activity (IC50 < 20 mg/L) and was identified as Penicillium rolfsii (MT729953) through ITS sequencing. Treatment of papaya fruit wounds with a fermentation broth of strain Y17 significantly inhibited the infection and colonization of anthracnose pathogens, resulting in a slowed disease incidence rate. This promoted the activity of protective enzymes, such as CAT, POD, and SOD, in the papaya fruit and slowed down the rate of MDA accumulation. This strain, which was found to have antioxidant activity in this study, has the potential to control anthracnose in papaya and has value in terms of further development and utilization.
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Affiliation(s)
- Jinhui Lv
- School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Hainan University, Sanya 572025, China
- Key Laboratory for Quality Regulation of Tropical Horticultural Crops of Hainan Province, School of Tropical Agriculture and Forestry, Hainan University, Haikou 570228, China
| | - Shuwei Ke
- Key Laboratory for Quality Regulation of Tropical Horticultural Crops of Hainan Province, School of Tropical Agriculture and Forestry, Hainan University, Haikou 570228, China
| | - Xinrui He
- Key Laboratory for Quality Regulation of Tropical Horticultural Crops of Hainan Province, School of Tropical Agriculture and Forestry, Hainan University, Haikou 570228, China
| | - Baolong Zhang
- School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Hainan University, Sanya 572025, China
| | - Zhongbing Zheng
- School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Hainan University, Sanya 572025, China
| | - Ping Chen
- School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Hainan University, Sanya 572025, China
- Key Laboratory for Quality Regulation of Tropical Horticultural Crops of Hainan Province, School of Tropical Agriculture and Forestry, Hainan University, Haikou 570228, China
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Jiao F, Cui X, Gong X, Jiang G, Wang J, Meng L. The effects of ultrasonic processing on the antioxidant activity of Geotrichum candidum LG-8 and its cell wall extracts. Front Nutr 2024; 11:1334956. [PMID: 38450237 PMCID: PMC10915238 DOI: 10.3389/fnut.2024.1334956] [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: 11/08/2023] [Accepted: 01/26/2024] [Indexed: 03/08/2024] Open
Abstract
Introduction Extraction techniques that influence cell wall polysaccharides (EPS) is crucial for maximizing their bioactivity. This study evaluates ultrasound technology for extracting antioxidant polysaccharides from Geotrichum candidum LG-8, assessing its impacton antioxidant activity. Methods Ultrasound extraction of EPS from G. candidum LG-8 was optimized (18 min, pH 7.0, 40 W/cm2, 0.75 M NaCl). ABTS scavenging efficiency and monosaccharide composition of LG-EPS1 and LG-EPS3 were analyzed using Fourier-transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). Results The Results showed that ultrasonic treatment markedly increased the ABTS radical scavenging efficiency of LG-8 cells by 47%. At a concentration of 1 mg/mL, the ultrasonically extracted LG-EPS1 and LG-EPS3 polysaccharides exhibited significant ABTS radical scavenging efficiencies of 26% and 51%, respectively. Monosaccharide composition analysis identified mannose and glucose in LG-EPS1, while LG-EPS3 was primarily composed of mannose. FTIR spectra verified the polysaccharides' presence, and SEM provided visual confirmation of the nanoparticle structures characteristic of LG-EPS1 and LG-EPS3. Discussion This research not only underscores the technological merits of ultrasound in polysaccharide extraction but also highlights the potential of G. candidum LG-8 derived polysaccharides as valuable bioactive compounds for antioxidant utilization.
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Affiliation(s)
- Fengping Jiao
- School of Public Health, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, Shandong, China
| | - Xianping Cui
- Division of Hepatobiliary and Pancreatic Surgery, Affiliated Provincial Hospital, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, Shandong, China
| | - Xiaodi Gong
- School of Public Health, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, Shandong, China
| | - Guozheng Jiang
- Yantai Hengyuan Bioengineering Co. Ltd., Yantai, Shandong, China
| | - Jinbiao Wang
- Yantai Hengyuan Bioengineering Co. Ltd., Yantai, Shandong, China
| | - Ling Meng
- School of Public Health, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, Shandong, China
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An ZG, Shang HS, Cui ZJ, Huang YF, Wu R, Li RH. Arbuscular mycorrhizal fungal communities in soils where astragalus had grown for 2 years were similar to those in the abandoned farmland. Front Microbiol 2024; 14:1293496. [PMID: 38239725 PMCID: PMC10794390 DOI: 10.3389/fmicb.2023.1293496] [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: 09/13/2023] [Accepted: 11/14/2023] [Indexed: 01/22/2024] Open
Abstract
Purpose Astragalus-cultivated soils are enriched in arbuscular mycorrhizal fungi (AMF); however, the community changes of AMF between years in stragalus-cultivated soils are still unclear. Methods To illustrate this, using high-throughput amplicon sequencing and quantitative real-time PCR, we analyzed the AMF communities of the abandoned farmlands and interannual astragalus-cultivated soils for 1-, 2-, 3-, and 4-years, including community composition, dominant, core, specific and significantly fluctuating AMF, co-occurrence network, alpha diversity, and beta diversity. Results A total of 74 OTUs were classified into one phylum, Glomeromycota; one class, Glomeromycetes; four orders; four families; and six genera. The 2-year soil had the highest number of reads among the interannual soils. Only one OTU was shared among all interannual soils. The treatments significantly affected the Ace, Shannoneven, and Shannon estimators of the communities. The 2-year soil had the highest richness, evenness, and diversity among all interannual soils and was the closest to the abandoned farmland in terms of alpha diversity. Glomus of the family Glomeraceae was the dominant genus present in all treatments, and the composition of the dominant genus in interannual soils was different. Both Glomus and Diversispora were the core AMF in interannual soils, and specific AMF existed in different interannual soils. Glomus is a genus that exhibits significant interannual variation. The interannual time significantly affected the network connectivity. The results of the principal coordinate analysis showed that the community composition of the interannual soils was close to each other and separated from the abandoned farmland, and that the interannual time significantly affected the community composition. Conclusion Among the interannual soils, the 2-year soil may be more suitable for A. sinensis seedling rotation.
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Affiliation(s)
- Zhi-Gang An
- College of Public Health, Gansu University of Chinese Medicine, Lanzhou, China
- Pharmacy Department, Gansu University of Chinese Medicine, Dingxi, China
| | - Hu-Shan Shang
- Chinese Herbal Medicine Institute, Dingxi Academy of Agricultural Sciences, Dingxi, China
| | - Zhi-Jia Cui
- Pharmacy Department, Gansu University of Chinese Medicine, Dingxi, China
| | - Yu-Fang Huang
- College of Pharmacy, Gansu University of Chinese Medicine, Lanzhou, China
| | - Rui Wu
- Pharmacy Department, Gansu University of Chinese Medicine, Dingxi, China
| | - Run-Hong Li
- Pharmacy Department, Gansu University of Chinese Medicine, Dingxi, China
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El-Mahdy OM, Mohamed HI, El-Ansary AE. Optimizations of exopolysaccharide production by Fusarium nygamai strain AJTYC1 and its potential applications as an antioxidant, antimicrobial, anticancer, and emulsifier. BMC Microbiol 2023; 23:345. [PMID: 37978435 PMCID: PMC10655473 DOI: 10.1186/s12866-023-03100-8] [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: 08/18/2023] [Accepted: 10/31/2023] [Indexed: 11/19/2023] Open
Abstract
BACKGROUND Exopolysaccharides (EPSs) produced by microbes are recognized as biomacromolecules of great significance. EPSs from fungi are widely used in a variety of biotechnological fields, including medicine, bioremediation, and agriculture. RESULTS In this study, ten fungal isolates were isolated from Kafir El-Dair, Qalubia Governorate, Egypt. Isolate 5 produced more exopolysaccharides than the other examined fungi. According to microscopic morphological traits and genetic confirmation by the 18S rRNA gene, isolate 5 was identified as Fusarium nygamai strain AJTYC1. The present study showed that Czapek's broth media, which contains 6 g/100 ml of sucrose, 10 g/100 ml of peptone, pH 6, and 1.8 × 105 CFU/ml of inoculum size and is incubated at 30 °C for 9 days, was suitable for the production of EPSs from Fusarium nygamai strain AJTYC1 by using static conditions. Fourier transform infrared (FT-IR) was employed in the characterization of EPSs, which exhibited the presence of carboxyl groups, hydroxyl groups, carbonyl groups, and glycosidic bonds. High-performance liquid chromatography (HPLC) detected that EPSs consist of sucrose and glucose. The scavenging activity indicates that EPSs have good antioxidant activity. The partially purified exopolysaccharides produced from F. nygamai strain AJTYC1 exhibited excellent antioxidant and antimicrobial activity against gram positive, gram negative and fungal strains. The EPSs at a dose of 1000 µg/ml exhibited anticancer activity against colorectal colon cancer (HCT116), breast cancer (MCF7), and hepatocellular cancer cell lines. Moreover, EPSs is an effective emulsifier of a variety of vegetable oils, and the emulsion it produces is generally stable for up to 168 h. CONCLUSIONS The production of EPSs from F. nygamai strain AJTYC1 can be used as antioxidants, antimicrobials, anticancer, and emulsifiers.
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Affiliation(s)
- Omima M El-Mahdy
- Biological and Geological Sciences Department, Faculty of Education, Ain Shams University, Cairo, 1575, Egypt
| | - Heba I Mohamed
- Biological and Geological Sciences Department, Faculty of Education, Ain Shams University, Cairo, 1575, Egypt.
| | - Abeer E El-Ansary
- Biochemistry Department, Faculty of Agriculture, Cairo University, Gamma St, Giza, 12613, Egypt
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Huang X, Shi L, Lin Y, Zhang C, Liu P, Zhang R, Chen Q, Ouyang X, Gao Y, Wang Y, Sun T. Pycnoporus sanguineus Polysaccharides as Reducing Agents: Self-Assembled Composite Nanoparticles for Integrative Diabetic Wound Therapy. Int J Nanomedicine 2023; 18:6021-6035. [PMID: 37908670 PMCID: PMC10614664 DOI: 10.2147/ijn.s427055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Accepted: 10/10/2023] [Indexed: 11/02/2023] Open
Abstract
Purpose Diabetic foot ulcers (DFU) are severe complications of diabetes, posing significant health and societal challenges. Elevated levels of reactive oxygen species (ROS) at the ulcer site hinder wound healing in most patients, while individuals with diabetes are also more susceptible to bacterial infections. This study aims to synthesize a comprehensive therapeutic material using polysaccharides from Pycnoporus sanguineus to promote DFU wound healing, reduce ROS levels, and minimize bacterial infections. Methods Polysaccharides from P.sanguineus were employed as reducing and stabilizing agents to fabricate polysaccharide-based composite particles (PCPs) utilizing silver ions as templates. PCPs were characterized via UV-Vis, TEM, FTIR, XRD, and DLS. The antioxidant, antimicrobial, and cytotoxic properties of PCPs were assessed through in vitro and cellular experiments. The effects and mechanisms of PCPs on wound healing were evaluated using a diabetic ulcer mouse model. Results PCPs exhibited spherical particles with an average size of 57.29±22.41 nm and effectively combined polysaccharides' antioxidant capacity with silver nanoparticles' antimicrobial function, showcasing synergistic therapeutic effects. In vitro and cellular experiments demonstrated that PCPs reduced cellular ROS levels by 54% at a concentration of 31.25 μg/mL and displayed potent antibacterial activity at 8 μg/mL. In vivo experiments revealed that PCPs enhanced the activities of superoxide dismutase (SOD) and catalase (CAT), promoting wound healing in DFUs and lowering the risk of bacterial infections. Conclusion The synthesized PCPs offer a novel strategy for the comprehensive treatment of DFU. By integrating antioxidant and antimicrobial functions, PCPs effectively promote wound healing and alleviate patient suffering. The present study demonstrates a new strategy for the integrated treatment of diabetic wounds and expands the way for developing and applying the polysaccharide properties of P. sanguineus.
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Affiliation(s)
- Xiaofei Huang
- Shandong Key Laboratory of Proteins and Peptides Pharmaceutical Engineering, Shandong Universities Key Laboratory of Biological Medicine, School of Life Science and Technology, Weifang Medical University, Weifang, Shandong, 261053, People’s Republic of China
| | - Lihua Shi
- Shandong Key Laboratory of Proteins and Peptides Pharmaceutical Engineering, Shandong Universities Key Laboratory of Biological Medicine, School of Life Science and Technology, Weifang Medical University, Weifang, Shandong, 261053, People’s Republic of China
| | - Yin Lin
- Shandong Key Laboratory of Proteins and Peptides Pharmaceutical Engineering, Shandong Universities Key Laboratory of Biological Medicine, School of Life Science and Technology, Weifang Medical University, Weifang, Shandong, 261053, People’s Republic of China
| | - Cong Zhang
- Shandong Key Laboratory of Proteins and Peptides Pharmaceutical Engineering, Shandong Universities Key Laboratory of Biological Medicine, School of Life Science and Technology, Weifang Medical University, Weifang, Shandong, 261053, People’s Republic of China
| | - Penghui Liu
- Shandong Key Laboratory of Proteins and Peptides Pharmaceutical Engineering, Shandong Universities Key Laboratory of Biological Medicine, School of Life Science and Technology, Weifang Medical University, Weifang, Shandong, 261053, People’s Republic of China
| | - Ran Zhang
- School of Pharmacy, Weifang Medical University, Weifang, Shandong, 261053, People’s Republic of China
| | - Qiqi Chen
- Shandong Key Laboratory of Proteins and Peptides Pharmaceutical Engineering, Shandong Universities Key Laboratory of Biological Medicine, School of Life Science and Technology, Weifang Medical University, Weifang, Shandong, 261053, People’s Republic of China
| | - Xudong Ouyang
- School of Life Science and Technology, Weifang Medical University, Weifang, Shandong, 261053, People’s Republic of China
| | - Yuanyuan Gao
- School of Pharmacy, Weifang Medical University, Weifang, Shandong, 261053, People’s Republic of China
| | - Yingshuai Wang
- School of Life Science and Technology, Weifang Medical University, Weifang, Shandong, 261053, People’s Republic of China
| | - Tongyi Sun
- Shandong Key Laboratory of Proteins and Peptides Pharmaceutical Engineering, Shandong Universities Key Laboratory of Biological Medicine, School of Life Science and Technology, Weifang Medical University, Weifang, Shandong, 261053, People’s Republic of China
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Su X, Menghe B, Zhang H, Liu W. In Vitro Evaluation of Intestinal Transport and High-Density Fermentation of Lactobacillus acidophilus. Metabolites 2023; 13:1077. [PMID: 37887401 PMCID: PMC10609339 DOI: 10.3390/metabo13101077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 09/14/2023] [Accepted: 09/29/2023] [Indexed: 10/28/2023] Open
Abstract
Lactobacillus acidophilus strains have limiting factors such as low cell density and complex nutritional requirements in industrial production, which greatly restricts their industrial application. In this study, fermentation conditions for L. acidophilus were optimized and transcriptomic analysis used to understand growth mechanisms under high-density fermentation conditions. We found that L. acidophilus IMAU81186 has strong tolerance to gastrointestinal juice. In addition, its optimal culture conditions were 3% inoculum (v/v); culture temperature 37 °C; initial pH 6.5; and medium composition of 30.18 g/L glucose, 37.35 g/L soybean peptone, 18.68 g/L fish peptone, 2.46 g/L sodium citrate, 6.125 g/L sodium acetate, 2.46 g/L K2HPO4, 0.4 g/L MgSO4·7H2O,0.04 g/L MnSO4·5H2O, 0.01 g/L serine, and 0.3 g/L uracil. After optimization, viable counts of IMAU81186 increased by 7.03 times. Differentially expressed genes in IMAU81186 were analyzed at different growth stages using transcriptomics. We found that a single carbon source had limitations in improving the biomass of the strain, and terP and bfrA were significantly down-regulated in the logarithmic growth period, which may be due to the lack of extracellular sucrose. After optimizing the carbon source, we found that adding 12 g/L sucrose to the culture medium significantly increased cell density.
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Affiliation(s)
- Xin Su
- Key Laboratory of Dairy Biotechnology and Engineering, Ministry of Education, Inner Mongolia Agricultural University, Hohhot 010018, China; (X.S.); (B.M.); (H.Z.)
- Key Laboratory of Dairy Products Processing, Ministry of Agriculture and Rural Affairs, Inner Mongolia Agricultural University, Hohhot 010018, China
- Inner Mongolia Key Laboratory of Dairy Biotechnology and Engineering, Inner Mongolia Agricultural University, Hohhot 010018, China
- Collaborative Innovative Center of Ministry of Education for Lactic Acid Bacteria and Fermented Dairy Products, Inner Mongolia Agricultural University, Hohhot 010018, China
| | - Bilige Menghe
- Key Laboratory of Dairy Biotechnology and Engineering, Ministry of Education, Inner Mongolia Agricultural University, Hohhot 010018, China; (X.S.); (B.M.); (H.Z.)
- Key Laboratory of Dairy Products Processing, Ministry of Agriculture and Rural Affairs, Inner Mongolia Agricultural University, Hohhot 010018, China
- Inner Mongolia Key Laboratory of Dairy Biotechnology and Engineering, Inner Mongolia Agricultural University, Hohhot 010018, China
- Collaborative Innovative Center of Ministry of Education for Lactic Acid Bacteria and Fermented Dairy Products, Inner Mongolia Agricultural University, Hohhot 010018, China
| | - Heping Zhang
- Key Laboratory of Dairy Biotechnology and Engineering, Ministry of Education, Inner Mongolia Agricultural University, Hohhot 010018, China; (X.S.); (B.M.); (H.Z.)
- Key Laboratory of Dairy Products Processing, Ministry of Agriculture and Rural Affairs, Inner Mongolia Agricultural University, Hohhot 010018, China
- Inner Mongolia Key Laboratory of Dairy Biotechnology and Engineering, Inner Mongolia Agricultural University, Hohhot 010018, China
- Collaborative Innovative Center of Ministry of Education for Lactic Acid Bacteria and Fermented Dairy Products, Inner Mongolia Agricultural University, Hohhot 010018, China
| | - Wenjun Liu
- Key Laboratory of Dairy Biotechnology and Engineering, Ministry of Education, Inner Mongolia Agricultural University, Hohhot 010018, China; (X.S.); (B.M.); (H.Z.)
- Key Laboratory of Dairy Products Processing, Ministry of Agriculture and Rural Affairs, Inner Mongolia Agricultural University, Hohhot 010018, China
- Inner Mongolia Key Laboratory of Dairy Biotechnology and Engineering, Inner Mongolia Agricultural University, Hohhot 010018, China
- Collaborative Innovative Center of Ministry of Education for Lactic Acid Bacteria and Fermented Dairy Products, Inner Mongolia Agricultural University, Hohhot 010018, China
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Naveen KV, Sathiyaseelan A, Mandal S, Han K, Wang MH. Unveiling the Structural Characteristics and Bioactivities of the Polysaccharides Extracted from Endophytic Penicillium sp. Molecules 2023; 28:5788. [PMID: 37570759 PMCID: PMC10421393 DOI: 10.3390/molecules28155788] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 07/21/2023] [Accepted: 07/29/2023] [Indexed: 08/13/2023] Open
Abstract
Polysaccharides are abundantly present in fungi and are gaining recognition for their exceptional bioactivities. Hence, the present study aimed to extract intracellular polysaccharides (IPS-1 and IPS-2) from the endophytic Penicillium radiatolobatum and compare their physicochemical and bioactive attributes. The monosaccharide composition analysis revealed the existence of galactose, glucose, and mannose in both the IPS, while a trace amount of xylose was found in IPS-1. Further, FT-IR, 1H NMR, and 13C NMR analysis suggested that the IPS-2 was mainly composed of the β-(1→4)-D-Galactose and β-(1→4)-D-Glucose as the main chain, with the β-(1→6)-D-mannose as branched chains. Compared to IPS-1, the IPS-2 showed higher antioxidant activities with an IC50 value of 108 ± 2.5 μg/mL, 272 ± 4.0 μg/mL, and 760 ± 5.0 μg/mL for ABTS+ scavenging, DPPH radical scavenging, and ferric reducing power, respectively. In addition, the IPS-2 inhibited the viability of prostate cancer (PC-3) cells (IC50; 435 ± 3.0 μg/mL) via apoptosis associated with mitochondrial membrane potential collapse and altered morphological features, which was revealed by cellular staining and flow cytometric analysis. Moreover, no apparent cytotoxic effects were seen in IPS-2-treated (1000 μg/mL) non-cancerous cells (HEK-293 and NIH3T3). Overall, the findings of this study suggest that P. radiatolobatum could be a potent source of polysaccharides with promising antioxidant and anticancer activity.
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Affiliation(s)
- Kumar Vishven Naveen
- Department of Bio-Health Convergence, Kangwon National University, Chuncheon 24341, Republic of Korea; (K.V.N.); (A.S.); (K.H.)
| | - Anbazhagan Sathiyaseelan
- Department of Bio-Health Convergence, Kangwon National University, Chuncheon 24341, Republic of Korea; (K.V.N.); (A.S.); (K.H.)
| | - Sumana Mandal
- Department of Chemistry, Sungkyunkwan University, Suwon 16419, Republic of Korea;
| | - Kiseok Han
- Department of Bio-Health Convergence, Kangwon National University, Chuncheon 24341, Republic of Korea; (K.V.N.); (A.S.); (K.H.)
| | - Myeong-Hyeon Wang
- Department of Bio-Health Convergence, Kangwon National University, Chuncheon 24341, Republic of Korea; (K.V.N.); (A.S.); (K.H.)
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Wang X, Yang Z, Liu Y, Wang X, Zhang H, Shang R, Laba C, Wujin C, Hao B, Wang S. Structural characteristic of polysaccharide isolated from Nostoc commune, and their potential as radical scavenging and antidiabetic activities. Sci Rep 2022; 12:22155. [PMID: 36550164 PMCID: PMC9780359 DOI: 10.1038/s41598-022-26802-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Accepted: 12/20/2022] [Indexed: 12/24/2022] Open
Abstract
In this paper, Nostoc commune crude polysaccharide was extracted by heating and Ultrasonic-assisted methods separately, homogeneous polysaccharide HNCP3 and UNCP4 were obtained after purified by DEAE-52 cellulose column chromatography and Sephacryl G-100 gel column chromatography. The structures of HNCP3 and UNCP4 were characterized by molecular weight determination, infrared spectroscopy, DSC detection, sodium periodate oxidation, smith degradation reaction and methylation analysis. The conformation of the solution was studied by SEM and AFM. The results showed that the Ultrasonic-assisted extraction had effects on the molecular weight, monosaccharide composition, molar ratio and configuration of Nostoc commune. The main chain of HNCP3 and UNCP4 was → 6)-D-Glcp(1→ and → 2, 6)-D-Glcp, but UNCP4 contained 1, 2, 6-galactose and 2, 3-Me2-D-Ara branches, while HNCP3 did not. The results of the monosaccharides composition of indicated that mannose was presented in both HNCP3 and UNCP4. SEM and AFM showed that the structure of UNCP4 was helical, and the solution conformations of HNCP3 and UNCP4 were different in different solution environments. Studies on DPPH radicals, superoxide anions, and hydroxyl radicals scavenging abilities showed that UNCP4 had higher antioxidant activity, while studies on the antidiabetic activities showed that the hypoglycemic effect of UNCP4 was stronger than that of HNCP3. Therefore, Ultrasonic-assisted extraction (UAE) increases the bioactivity of Nostoc commune polysaccharide (NCP) as well as the extraction rate.
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Affiliation(s)
- Xinjian Wang
- Key Laboratory of New Animal Drug Project, Gansu Province, Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture and Rural Affairs, Lanzhou Institute of Husbandry and Pharmaceutical Sciences of Chinese Academy of Agriculture Sciences, Lanzhou, 730050, People's Republic of China
| | - Zhen Yang
- Key Laboratory of New Animal Drug Project, Gansu Province, Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture and Rural Affairs, Lanzhou Institute of Husbandry and Pharmaceutical Sciences of Chinese Academy of Agriculture Sciences, Lanzhou, 730050, People's Republic of China
| | - Yu Liu
- Key Laboratory of New Animal Drug Project, Gansu Province, Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture and Rural Affairs, Lanzhou Institute of Husbandry and Pharmaceutical Sciences of Chinese Academy of Agriculture Sciences, Lanzhou, 730050, People's Republic of China
| | - Xuehong Wang
- Key Laboratory of New Animal Drug Project, Gansu Province, Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture and Rural Affairs, Lanzhou Institute of Husbandry and Pharmaceutical Sciences of Chinese Academy of Agriculture Sciences, Lanzhou, 730050, People's Republic of China
| | - Hongjuan Zhang
- Key Laboratory of New Animal Drug Project, Gansu Province, Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture and Rural Affairs, Lanzhou Institute of Husbandry and Pharmaceutical Sciences of Chinese Academy of Agriculture Sciences, Lanzhou, 730050, People's Republic of China
| | - Ruofeng Shang
- Key Laboratory of New Animal Drug Project, Gansu Province, Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture and Rural Affairs, Lanzhou Institute of Husbandry and Pharmaceutical Sciences of Chinese Academy of Agriculture Sciences, Lanzhou, 730050, People's Republic of China
| | - Cidan Laba
- Institute of Animal Science and Veterinary, Tibet Academy of Agricultural and Animal Husbandry Sciences, Lhasa, 850009, People's Republic of China
| | - Cuomu Wujin
- Institute of Animal Science and Veterinary, Tibet Academy of Agricultural and Animal Husbandry Sciences, Lhasa, 850009, People's Republic of China
| | - Baocheng Hao
- Key Laboratory of New Animal Drug Project, Gansu Province, Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture and Rural Affairs, Lanzhou Institute of Husbandry and Pharmaceutical Sciences of Chinese Academy of Agriculture Sciences, Lanzhou, 730050, People's Republic of China.
| | - Shengyi Wang
- Key Laboratory of New Animal Drug Project, Gansu Province, Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture and Rural Affairs, Lanzhou Institute of Husbandry and Pharmaceutical Sciences of Chinese Academy of Agriculture Sciences, Lanzhou, 730050, People's Republic of China.
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Hu X, Saravanakumar K, Park S, Han KS, Wang MH. Isolation, Characterization, Antioxidant, and Wound Healing Activities of Extracellular Polysaccharide from Endophytic Fungus Talaromyces purpureogenus. Appl Biochem Biotechnol 2022; 195:3822-3839. [PMID: 36260249 DOI: 10.1007/s12010-022-04187-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/28/2022] [Indexed: 11/02/2022]
Abstract
In this study, two extracellular polysaccharides (TEPS1 and TEPS2) were isolated from the endophytic fungus (Talaromyces purpureogenus) and purified by DEAE-Sepharose Fast Flow column using NaCl as gradient eluent. The HPLC analysis displayed that TEPS1 was composed of mannose (38.70%), ribose (25.02%), glucose (19.34%), and galactose (16.94%) while the TEPS2 composed by mannose (100%). The NMR results indicated that TEPS1 exhibited α-glycosidic configurations. The both polysaccharides, TEPS1 and TEPS2 were exhibited a good antioxidant activity in terms of DPPH, ABTS, and •OH scavenging. However, TEPS1 showed a higher antioxidant activity than TEPS2. The IC50 of TEPS1 were 32.16, 192.57, and 54.67 μg·mL-1, for DPPH, ABTS, and •OH radical scavenging, respectively. Furthermore, TEPS1 showed the high cellular antioxidant and wound healing activity in the human embryonic kidney (HEK293) cell line. Overall, these two polysaccharides were promising in antioxidant activity.
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Affiliation(s)
- Xiaowen Hu
- Department of Bio-Health Convergence, Kangwon National University, Chuncheon, 200-701, South Korea
| | - Kandasamy Saravanakumar
- Department of Bio-Health Convergence, Kangwon National University, Chuncheon, 200-701, South Korea
| | - SeonJu Park
- Chuncheon Center, Korea Basic Science Institute (KBSI), Chuncheon, 24341, Republic of Korea
| | - Ki-Seok Han
- Department of Bio-Health Convergence, Kangwon National University, Chuncheon, 200-701, South Korea
| | - Myeong-Hyeon Wang
- Department of Bio-Health Convergence, Kangwon National University, Chuncheon, 200-701, South Korea.
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10
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Zhang J, Zhu Y, Si J, Wu L. Metabolites of medicine food homology-derived endophytic fungi and their activities. Curr Res Food Sci 2022; 5:1882-1896. [PMID: 36276242 PMCID: PMC9579210 DOI: 10.1016/j.crfs.2022.10.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Revised: 09/08/2022] [Accepted: 10/06/2022] [Indexed: 11/04/2022] Open
Abstract
Medicine food homology (MFH) substances not only provide essential nutrients as food but also have corresponding factors that can prevent and help treat nutritional imbalances, chronic disease, and other related issues. Endophytic fungi associated with plants have potential for use in drug discovery and food therapy. However, the endophytic fungal metabolites from MFH plants and their effects have been overlooked. Therefore, this review focuses on the various biological activities of 108 new metabolites isolated from 53 MFH-derived endophytic fungi. The paper explores the potential nutritional and medicinal value of metabolites of MFH-derived endophytic fungi for food and medical applications. This research is important for the future development of effective, safe, and nontoxic therapeutic nutraceuticals for the prevention and treatment of human diseases.
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11
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Xie L, Xie J, Chen X, Tao X, Xie J, Shi X, Huang Z. Comparative transcriptome analysis of Monascus purpureus at different fermentation times revealed candidate genes involved in exopolysaccharide biosynthesis. Food Res Int 2022; 160:111700. [DOI: 10.1016/j.foodres.2022.111700] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Revised: 06/27/2022] [Accepted: 07/15/2022] [Indexed: 11/26/2022]
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12
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Xu M, Pan L, Zhou Z, Han Y. Structural characterization of levan synthesized by a recombinant levansucrase and its application as yogurt stabilizers. Carbohydr Polym 2022; 291:119519. [DOI: 10.1016/j.carbpol.2022.119519] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Revised: 04/16/2022] [Accepted: 04/20/2022] [Indexed: 11/27/2022]
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13
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Dora S, Terrett OM, Sánchez-Rodríguez C. Plant-microbe interactions in the apoplast: Communication at the plant cell wall. THE PLANT CELL 2022; 34:1532-1550. [PMID: 35157079 PMCID: PMC9048882 DOI: 10.1093/plcell/koac040] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Accepted: 01/29/2022] [Indexed: 05/20/2023]
Abstract
The apoplast is a continuous plant compartment that connects cells between tissues and organs and is one of the first sites of interaction between plants and microbes. The plant cell wall occupies most of the apoplast and is composed of polysaccharides and associated proteins and ions. This dynamic part of the cell constitutes an essential physical barrier and a source of nutrients for the microbe. At the same time, the plant cell wall serves important functions in the interkingdom detection, recognition, and response to other organisms. Thus, both plant and microbe modify the plant cell wall and its environment in versatile ways to benefit from the interaction. We discuss here crucial processes occurring at the plant cell wall during the contact and communication between microbe and plant. Finally, we argue that these local and dynamic changes need to be considered to fully understand plant-microbe interactions.
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Li N, Xu D, Huang RH, Zheng JY, Liu YY, Hu BS, Gu YQ, Du Q. A New Source of Diterpene Lactones From Andrographis paniculata (Burm. f.) Nees—Two Endophytic Fungi of Colletotrichum sp. With Antibacterial and Antioxidant Activities. Front Microbiol 2022; 13:819770. [PMID: 35295309 PMCID: PMC8918950 DOI: 10.3389/fmicb.2022.819770] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Accepted: 01/18/2022] [Indexed: 02/06/2023] Open
Abstract
Endophytic fungi of medicinal plants are abundant, and their metabolites often have antioxidant, antibacterial, and antitumor effects and can produce secondary metabolites identical or similar to those of their hosts, which can mitigate the problem of insufficient supply of medicinal plants. In this study, we screened endophytic fungi for strains that produce the same diterpene lactones as Andrographis paniculata based on their biological activity. Firstly, the dominant group of endophytic fungi of Andrographis paniculata was screened and pathogenicity was studied using Koch’s rule. Secondly, DPPH, ABTS, OH, PTIO radical scavenging, and FRAP assays were used to detect the antioxidant activity of the extracellular extracts of the strains, and total phenol and total flavonoid contents of the strains with high antioxidant capacity were determined. S. aureus, B. subtilis, E. coli, and P. aeruginosa were used to determine the antibacterial activity of the mycelial extracts of the strains. Finally, the secondary metabolites of the mycelial extracts of the strains were examined by high-performance liquid chromatography. The results showed that 32 strains of Andrographis paniculata were relatively isolated > 70% and non-pathogenic. Extracellular extracts of strains AP-1 and AP-4 showed vigorous antioxidant activity, and AP-4, AP-12, AP-47, and AP-48 showed antibacterial activity against four strains of bacteria. The HPLC results indicated that the mycelial extracts of AP-4 and AP-12 contained diterpene lactones. The two endophytic fungi were recognized as Colletotrichum sp. The study successfully obtained diterpene lactones from the endophytic fungus of Andrographis paniculata and confirmed the feasibility of using endophytic fungal strains to produce active substances consistent with the host. It was also useful for exploring endophytic fungi and medicinal plants. The relationship provides theoretical guidance.
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Falade AO, Adewole KE, Ekundayo TC. Aptitude of endophytic microbes for production of novel biocontrol agents and industrial enzymes towards agro-industrial sustainability. BENI-SUEF UNIVERSITY JOURNAL OF BASIC AND APPLIED SCIENCES 2021. [DOI: 10.1186/s43088-021-00146-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Abstract
Background
Endophytes have continued to receive increased attention worldwide, probably, due to the enormous biotechnological potentials spanning through various industrial sectors. This paper outlines the biotechnological potentials of endophytes in biocontrol and industrial enzyme production, and the possible contribution towards achieving agro-industrial sustainability using published articles on endophytes in both Web of Science and Scopus (1990–2020).
Main body of the abstract
This review discusses the potential of endophytes to produce novel secondary metabolites with effective biocontrol activity against insect pests and plant pathogens. More so, the aptitude of endophytes for production of a wide range of enzymes with potential applications in agriculture, energy and health is discussed in this review. Furthermore, this review highlights the emerging potentials of endophytes in the production of exopolysaccharide and fatty acids. This paper also advocates the need for bioprospecting endophytes for novel biocontrol agents against termites, which are known for causing significant damage to forest and stored products.
Short conclusion
Exploration of endophytes for biocontrol and production of biomolecules of industrial significance could contribute significantly towards agricultural and industrial sustainability.
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Liu X, Zhou ZY, Cui JL, Wang ML, Wang JH. Biotransformation ability of endophytic fungi: from species evolution to industrial applications. Appl Microbiol Biotechnol 2021; 105:7095-7113. [PMID: 34499202 PMCID: PMC8426592 DOI: 10.1007/s00253-021-11554-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Revised: 08/24/2021] [Accepted: 08/25/2021] [Indexed: 12/26/2022]
Abstract
Increased understanding of the interactions between endophytic fungi and plants has led to the discovery of a new generation of chemical compounds and processes between endophytic fungi and plants. Due to the long-term co-evolution between fungal endophytes and host plants, endophytes have evolved special biotransformation abilities, which can have critical consequences on plant metabolic processes and their composition. Biotransformation or bioconversion can impact the synthesis and decomposition of hormones, sugars, amino acids, vitamins, lipids, proteins, and various secondary metabolites, including flavonoids, polysaccharides, and terpenes. Endophytic fungi produce enzymes and various bioactive secondary metabolites with industrial value and can degrade or sequester inorganic and organic small molecules and macromolecules (e.g., toxins, pollutants, heavy metals). These fungi also have the ability to cause highly selective catalytic conversion of high-value compounds in an environmentally friendly manner, which can be important for the production/innovation of bioactive molecules, food and nutrition, agriculture, and environment. This work mainly summarized recent research progress in this field, providing a reference for further research and application of fungal endophytes. KEY POINTS: •The industrial value of degradation of endophytes was summarized. • The commercial value for the pharmaceutical industry is reviewed.
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Affiliation(s)
- Xi Liu
- Institute of Applied Chemistry, Shanxi University, Taiyuan, 030006, Shanxi, China
- Modern Research Center for Traditional Chinese Medicine, The Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education, Shanxi University, Taiyuan, 030006, Shanxi, China
| | - Zhong-Ya Zhou
- Institute of Applied Chemistry, Shanxi University, Taiyuan, 030006, Shanxi, China
- Modern Research Center for Traditional Chinese Medicine, The Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education, Shanxi University, Taiyuan, 030006, Shanxi, China
| | - Jin-Long Cui
- Institute of Applied Chemistry, Shanxi University, Taiyuan, 030006, Shanxi, China.
| | - Meng-Liang Wang
- Institute of Applied Chemistry, Shanxi University, Taiyuan, 030006, Shanxi, China
| | - Jun-Hong Wang
- Institute of Applied Chemistry, Shanxi University, Taiyuan, 030006, Shanxi, China
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17
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Burragoni SG, Jeon J. Applications of endophytic microbes in agriculture, biotechnology, medicine, and beyond. Microbiol Res 2021; 245:126691. [PMID: 33508761 DOI: 10.1016/j.micres.2020.126691] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Revised: 12/14/2020] [Accepted: 12/30/2020] [Indexed: 12/26/2022]
Abstract
Endophytes are emerging as integral components of plant microbiomes. Some of them play pivotal roles in plant development and plant responses to pathogens and abiotic stresses, whereas others produce useful and/or interesting secondary metabolites. The appreciation of their abilities to affect plant phenotypes and produce useful compounds via genetic and molecular interactions has paved the way for these abilities to be exploited for health and welfare of plants, humans and ecosystems. Here we comprehensively review current and potential applications of endophytes in the agricultural, pharmaceutical, and industrial sectors. In addition, we briefly discuss the research objectives that should be focused upon in the coming years in order for endophytes and their metabolites to be fully harnessed for potential use in diverse areas.
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Affiliation(s)
- Sravanthi Goud Burragoni
- Department of Biotechnology, College of Life and Applied Sciences, Yeungnam University, Gyeongsan, Gyeongbuk, 38541, Republic of Korea.
| | - Junhyun Jeon
- Department of Biotechnology, College of Life and Applied Sciences, Yeungnam University, Gyeongsan, Gyeongbuk, 38541, Republic of Korea.
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Kamat S, Kumari M, Sajna KV, Jayabaskaran C. Endophytic fungus, Chaetomium globosum, associated with marine green alga, a new source of Chrysin. Sci Rep 2020; 10:18726. [PMID: 33127928 PMCID: PMC7603332 DOI: 10.1038/s41598-020-72497-3] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Accepted: 09/02/2020] [Indexed: 01/29/2023] Open
Abstract
The marine ecosystem is an extraordinary reserve of pharmaceutically important, bioactive compounds even in this “synthetic age”. Marine algae-associated endophytic fungi have gained prominence as an important source of bioactive compounds. This study was conducted on secondary metabolites of Chaetomium globosum-associated with marine green alga Chaetomorpha media from the Konkan coastline, India. Its ethyl acetate extract (CGEE) exhibited an IC50 value of 7.9 ± 0.1 µg/mL on MCF-7 cells. CGEE exhibited G2M phase cell cycle arrest, ROS production and MMP loss in MCF-7 cells. The myco-components in CGEE contributing to the cytotoxicity were found by Gas Chromatography/Mass Spectrometry analyses. Chrysin, a dihydroxyflavone was one of the forty-six myco-components which is commonly found in honey, propolis and passionflower extracts. The compound was isolated and characterized as fungal chrysin using HPLC, UV–Vis spectroscopy, LC–MS, IR and NMR analyses by comparing with standard chrysin. The purified compound exhibited an IC50 value of 49.0 ± 0.6 µM while that of standard chrysin was 48.5 ± 1.6 µM in MCF-7 cells. It induced apoptosis, G1 phase cell cycle arrest, MMP loss, and ROS production. This is the first report of chrysin from an alternative source with opportunities for yield enhancement.
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Affiliation(s)
- Siya Kamat
- Department of Biochemistry, Indian Institute of Science, Bangalore, 560012, India
| | - Madhuree Kumari
- Department of Biochemistry, Indian Institute of Science, Bangalore, 560012, India
| | | | - C Jayabaskaran
- Department of Biochemistry, Indian Institute of Science, Bangalore, 560012, India.
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Initial Analysis on the Characteristics and Synthesis of Exopolysaccharides from Sclerotium rolfsii with Different Sugars as Carbon Sources. Polymers (Basel) 2020; 12:polym12020348. [PMID: 32033463 PMCID: PMC7077393 DOI: 10.3390/polym12020348] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Revised: 01/19/2020] [Accepted: 01/20/2020] [Indexed: 12/14/2022] Open
Abstract
Scleroglucan is widely used in the food and chemical industries because of its good rheological property, stability, and emulsification activity. To investigate the influence of different carbon sources on the properties and synthesis of exopolysaccharides (EPS), the three EPSs (GEPS, glucose was used as the carbon source; LEPS, lactose was used as the carbon source; and SEPS, sucrose was used as the carbon source) were determined, respectively. It was found that the yield and viscosity of exopolysaccharides were different. When sucrose and glucose were used as the carbon sources, the viscosity and yield of EPS were both higher than lactose. The scanning electron microscopy (SEM) images showed that the three EPSs had different morphologies, but the monosaccharide analysis showed that they were all composed of glucose units. Fourier transform infrared spectroscopy (FT-IR) proved that there were no additional substituents for the three EPSs. Furthermore, the high performance liquid chromatography (HPLC) results showed that SEPS and LEPS had two fractions. Through the analysis of proteomics data, there were few differences in the metabolic pathways between GEPS and SEPS, but a significant difference between LEPS and SEPS. Our study provides a theoretical basis and reference for understanding the biosynthesis of exopolysaccharides and the development of different types of EPS products.
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Xiong YW, Ju XY, Li XW, Gong Y, Xu MJ, Zhang CM, Yuan B, Lv ZP, Qin S. Fermentation conditions optimization, purification, and antioxidant activity of exopolysaccharides obtained from the plant growth-promoting endophytic actinobacterium Glutamicibacter halophytocola KLBMP 5180. Int J Biol Macromol 2019; 153:1176-1185. [PMID: 31756484 DOI: 10.1016/j.ijbiomac.2019.10.247] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2019] [Revised: 10/26/2019] [Accepted: 10/26/2019] [Indexed: 01/05/2023]
Abstract
In this study, an endophytic actinobacterium Glutamicibacter halophytocola KLBMP 5180, was investigated for the production and antioxidant activity of exopolysaccharides (EPSs). First, the suitable fermentation time, temperature, inoculation volume, pH value, and the carbon and nitrogen sources for EPSs production were obtained using the one variable at a time method (OVAT). Then, a central composition design was used for fermentation conditions optimization to obtain the maximum EPS yield. The optimal medium and condition were as follows: 100 mL broth in 250 mL Erlenmeyer flasks, including 3.65 g/L maltose, 9.88 g/L malt extract, 3.40 g/L yeast extract, 1.41 g/L MnCl2, pH 7.5, culture temperature 28 °C, and 200 rpm for 7 days, which increased the yield of EPSs to 2.89 g/L. Two purified EPSs, 5180EPS-1 (MW 58.9 kDa) and 5180EPS-2 (10.5 kDa), comprising rhamnose, galacturonic acid, glucose, glucuronic acid, xylose, and arabinose, were obtained for chemical analysis and antioxidant evaluation. The scavenging ability and reducing power of the superoxide anion and hydroxyl radicals demonstrated the moderate in vitro antioxidant activities of the two EPSs, thus indicating their potential to be a new source of natural antioxidants. However, further structure elucidation and functional studies need to be continued.
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Affiliation(s)
- You-Wei Xiong
- The Key Laboratory of Biotechnology for Medicinal Plant of Jiangsu Province (KLBMP), School of Life Science, Jiangsu Normal University, Xuzhou, Jiangsu 221116, PR China
| | - Xiu-Yun Ju
- The Key Laboratory of Biotechnology for Medicinal Plant of Jiangsu Province (KLBMP), School of Life Science, Jiangsu Normal University, Xuzhou, Jiangsu 221116, PR China
| | - Xue-Wei Li
- The Key Laboratory of Biotechnology for Medicinal Plant of Jiangsu Province (KLBMP), School of Life Science, Jiangsu Normal University, Xuzhou, Jiangsu 221116, PR China
| | - Yuan Gong
- The Key Laboratory of Biotechnology for Medicinal Plant of Jiangsu Province (KLBMP), School of Life Science, Jiangsu Normal University, Xuzhou, Jiangsu 221116, PR China
| | - Ming-Jie Xu
- The Key Laboratory of Biotechnology for Medicinal Plant of Jiangsu Province (KLBMP), School of Life Science, Jiangsu Normal University, Xuzhou, Jiangsu 221116, PR China
| | - Chun-Mei Zhang
- The Key Laboratory of Biotechnology for Medicinal Plant of Jiangsu Province (KLBMP), School of Life Science, Jiangsu Normal University, Xuzhou, Jiangsu 221116, PR China
| | - Bo Yuan
- The Key Laboratory of Biotechnology for Medicinal Plant of Jiangsu Province (KLBMP), School of Life Science, Jiangsu Normal University, Xuzhou, Jiangsu 221116, PR China
| | - Zuo-Peng Lv
- The Key Laboratory of Biotechnology for Medicinal Plant of Jiangsu Province (KLBMP), School of Life Science, Jiangsu Normal University, Xuzhou, Jiangsu 221116, PR China
| | - Sheng Qin
- The Key Laboratory of Biotechnology for Medicinal Plant of Jiangsu Province (KLBMP), School of Life Science, Jiangsu Normal University, Xuzhou, Jiangsu 221116, PR China.
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