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Wang J, Liu X, Jing Y, Zheng X. Purification and Biochemical Characterization of a Novel Fibrinolytic Enzyme from Culture Supernatant of Coprinus comatus. Foods 2024; 13:1292. [PMID: 38731663 PMCID: PMC11083162 DOI: 10.3390/foods13091292] [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: 03/26/2024] [Revised: 04/19/2024] [Accepted: 04/20/2024] [Indexed: 05/13/2024] Open
Abstract
A novel fibrinolytic enzyme was produced by the liquid fermentation of Coprinus comatus. The enzyme was purified from the culture supernatant by hydrophobic interactions, gel filtration, and ion exchange chromatographies. It was purified by 241.02-fold, with a specific activity of 3619 U/mg and a final yield of 10.02%. SDS-PAGE analysis confirmed the purity of the enzyme, showing a single band with a molecular weight of 19.5 kDa. The first nine amino acids of the N-terminal of the purified enzyme were A-T-Y-T-G-G-S-Q-T. The enzyme exhibited optimal activity at a temperature of 42 °C and pH 7.6. Its activity was significantly improved by Zn2+, K+, Ca2+, Mn2+, and Mg2+ while being inhibited by Fe2+, Fe3+, Al2+, and Ba2+. The activity of the enzyme was completely inhibited by ethylenediamine tetraacetic acid (EDTA), and it was also dose-dependently inhibited by phenylmethylsulfonyl fluoride (PMSF) and soy trypsin inhibitor (SBTI). However, inhibitors such as N-α-tosyl-L-phenylalanine chloromethyl ketone (TPCK), aprotinin, and pepstatin did not significantly affect its activity, suggesting that the enzyme was a serine-like metalloproteinase. The enzyme acted as both a plasmin-like fibrinolytic enzyme and a plasminogen activator, and it also exhibited the capability to hydrolyze fibrinogen and fibrin. In vitro, it demonstrated the ability to dissolve blood clots and exhibit anticoagulant properties. Furthermore, it was found that the enzyme prolonged activated partial thromboplastin time (APTT), prothrombin time (PT), and thrombin time (TT), and reduced the levels of fibrinogen (FIB) and prothrombin activity (PA). Based on these studies, the enzyme has great potential to be developed as a natural agent for the prevention and treatment of thrombotic diseases.
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Affiliation(s)
- Jinyu Wang
- College of Food Engineering, Harbin University of Commerce, Harbin 150076, China;
- Key Laboratory of Corn Deep Processing Theory and Technology of Heilongjiang Province, College of Food and Bioengineering, Qiqihar University, Qiqihar 161006, China; (Y.J.); (X.Z.)
| | - Xiaolan Liu
- College of Food Engineering, Harbin University of Commerce, Harbin 150076, China;
- Key Laboratory of Corn Deep Processing Theory and Technology of Heilongjiang Province, College of Food and Bioengineering, Qiqihar University, Qiqihar 161006, China; (Y.J.); (X.Z.)
- College of Food, Heilongjiang Bayi Agricultural University, Daqing 163319, China
| | - Yan Jing
- Key Laboratory of Corn Deep Processing Theory and Technology of Heilongjiang Province, College of Food and Bioengineering, Qiqihar University, Qiqihar 161006, China; (Y.J.); (X.Z.)
| | - Xiqun Zheng
- Key Laboratory of Corn Deep Processing Theory and Technology of Heilongjiang Province, College of Food and Bioengineering, Qiqihar University, Qiqihar 161006, China; (Y.J.); (X.Z.)
- College of Food, Heilongjiang Bayi Agricultural University, Daqing 163319, China
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2
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Santana RDS, Mendes FDS, Paula da Silva BJ, Lima ES, Nascimento TP, Carneiro da Cunha MN, Porto ALF, Teixeira MFS, Carvalho RP, Gomes WR. Recovery and partial purification of fibrinolytic protease from Pleurotus ostreatus and P. eryngii and cytotoxic and antioxidant activity of their extracts. Prep Biochem Biotechnol 2024; 54:545-552. [PMID: 37667995 DOI: 10.1080/10826068.2023.2253466] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/06/2023]
Abstract
Mushrooms are a source of primary and secondary metabolites. Little is known about the most suitable conditions for production of mushrooms by submerged fermentation. This article reports antioxidant and cytotoxic assays, in addition to quantitatively evaluating the content of proteases with fibrinolytic action in the crude extracts of two species of edible mushrooms produced in different formulations, as well as evaluating the recovery of these enzymes by aqueous two-phase systems (ATPS). The mushrooms Pleurotus ostreatus and Pleurotus eryngii, at concentration of 100 µg/mL, displayed inhibition of DPPH and ABTS radicals below 50%. In the cytotoxicity test, the cells human fibroblast cell lines (MRC-5) showed cell viability greater than 80%. Concerning fibrinolytic activity, P. eryngii presented 226.47 ± 7.26 U/mL, therefore being more efficient than P. ostreatus (71.5 ± 0.56 U/mL). In the recovery of the P. eryngii extract by ATPS, the fibrinolytic protease was partitioned in the salt phase (30.25 U/mL). The molecular mass of the proteases was between 75 and 100 kDa. These results prove the low cytotoxicity of the extracts produced and that fermentation in supplemented malt broth favored the excretion of fibrinolytic proteases compared to the other evaluated media.
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Affiliation(s)
- Romário da S Santana
- Postgraduate Program in Biotechnology, Federal University of Amazonas, Manaus, Brazil
| | - Felipe de S Mendes
- Postgraduate Program in Biotechnology, Federal University of Amazonas, Manaus, Brazil
| | | | - Emerson S Lima
- Faculty of Pharmaceutical Sciences, Federal University of Amazonas (UFAM), Manaus, Brazil
| | - Thiago P Nascimento
- Campus Professora Cinobelina Elvas, Federal University of Piaui, Bom Jesus, Brazil
| | | | - Ana Lúcia F Porto
- Department of Animal Morphology and Physiology, Rural Federal University of Pernambuco, Recife, Brazil
| | | | - Rosany P Carvalho
- Department of Physiological Sciences, Federal University of Amazonas, Manaus, Brazil
| | - Waldireny R Gomes
- Faculty of Pharmaceutical Sciences, Federal University of Amazonas (UFAM), Manaus, Brazil
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Purification, biochemical characterization and fibrinolytic potential of proteases produced by bacteria of the genus Bacillus: a systematic literature review. Arch Microbiol 2022; 204:503. [PMID: 35852634 DOI: 10.1007/s00203-022-03134-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2022] [Revised: 07/03/2022] [Accepted: 07/10/2022] [Indexed: 11/02/2022]
Abstract
Thrombosis is a hematological disorder characterized by the formation of intravascular thrombi, which contributes to the development of cardiovascular diseases. Fibrinolytic enzymes are proteases that promote the hydrolysis of fibrin, promoting the dissolution of thrombi, contributing to the maintenance of adequate blood flow. The characterization of new effective, safe and low-cost fibrinolytic agents is an important strategy for the prevention and treatment of thrombosis. However, the development of new fibrinolytics requires the use of complex methodologies for purification, physicochemical characterization and evaluation of the action potential and toxicity of these enzymes. In this context, microbial enzymes produced by bacteria of the Bacillus genus are promising and widely researched sources to produce new fibrinolytics, with high thrombolytic potential and reduced toxicity. Thus, this review aims to provide a current and comprehensive understanding of the different Bacillus species used for the production of fibrinolytic proteases, highlighting the purification techniques, biochemical characteristics, enzymatic activity and toxicological evaluations used.
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Zhao L, Lin X, Fu J, Zhang J, Tang W, He Z. A Novel Bi-Functional Fibrinolytic Enzyme with Anticoagulant and Thrombolytic Activities from a Marine-Derived Fungus Aspergillus versicolor ZLH-1. Mar Drugs 2022; 20:md20060356. [PMID: 35736159 PMCID: PMC9229710 DOI: 10.3390/md20060356] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Revised: 05/19/2022] [Accepted: 05/20/2022] [Indexed: 02/06/2023] Open
Abstract
Fibrinolytic enzymes are important components in the treatment of thrombosis-associated disorders. A new bi-functional fibrinolytic enzyme, versiase, was identified from a marine-derived fungus Aspergillus versicolor ZLH-1. The enzyme was isolated from the fungal culture through precipitation with ammonium sulfate at 90% saturation. Additionally, it was further purified by DEAE-based ion-exchange chromatography, with a recovery of 20.4%. The fibrinolytic enzyme presented as one band on both SDS-PAGE and fibrin-zymogram, with a molecular mass of 37.3 kDa. It was elucidated as a member of metalloprotease in M35 family by proteomic approaches. The homology-modeling analysis revealed that versiase shares significant structural homology wuth the zinc metalloendopeptidase. The enzyme displayed maximum activity at 40 °C and pH 5.0. The activity of versiase was strongly inhibited by the metalloprotease inhibitors EDTA and BGTA. Furthermore, versiase hydrolyzed fibrin directly and indirectly via the activation of plasminogen, and it was able to hydrolyze the three chains (α, β, γ) of fibrin(ogen). Additionally, versiase demonstrated promising thrombolytic and anticoagulant activities, without many side-effects noticed. In conclusion, versiase appears to be a potent fibrinolytic enzyme deserving further investigation.
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Affiliation(s)
- Lihong Zhao
- School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China; (L.Z.); (J.F.); (J.Z.); (W.T.)
| | - Xiuping Lin
- CAS Key Laboratory of Tropical Marine Bio-Resources and Ecology, Guangdong Key Laboratory of Marine Materia Medica, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China;
| | - Jingyun Fu
- School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China; (L.Z.); (J.F.); (J.Z.); (W.T.)
| | - Jun Zhang
- School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China; (L.Z.); (J.F.); (J.Z.); (W.T.)
| | - Wei Tang
- School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China; (L.Z.); (J.F.); (J.Z.); (W.T.)
| | - Zengguo He
- School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China; (L.Z.); (J.F.); (J.Z.); (W.T.)
- Marine Biomedical Research Institute of Qingdao, Qingdao 266071, China
- Qingdao Bioantai Biotechnology Co., Ltd., Qingdao 266000, China
- Correspondence: ; Tel./Fax: +86-186-1113-7588
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Purification and Characterization of a Fibrinolytic Enzyme from Marine Bacillus velezensis Z01 and Assessment of Its Therapeutic Efficacy In Vivo. Microorganisms 2022; 10:microorganisms10050843. [PMID: 35630289 PMCID: PMC9145925 DOI: 10.3390/microorganisms10050843] [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: 03/27/2022] [Revised: 04/14/2022] [Accepted: 04/15/2022] [Indexed: 11/17/2022] Open
Abstract
Fibrinolytic enzymes are the most effective agents for the treatment of thrombotic diseases. In the present study, we purified and characterized an extracellular fibrinolytic serine metalloprotease (named Velefibrinase) that is produced by marine Bacillus velezensis Z01 and assessed its thrombolysis in vivo. SDS-PAGE and MALDI-TOF-MS analyses showed that the molecular mass of Velefibrinase was 32.3 KDa and belonged to the peptidase S8 family. The optimal fibrinolytic activity conditions of Velefibrinase were 40 °C and pH 7.0. Moreover, Velefibrinase exhibited high substrate specificity to fibrin, and a higher ratio of fibrinolytic/caseinolytic (1.48) values, which indicated that Velefibrinase had excellent fibrinolytic properties. Based on the degradation pattern of fibrin and fibrinogen, Velefibrinase could be classified as α/β-fibrinogenase. In vitro, Velefibrinase demonstrated efficient thrombolytic ability, anti-platelet aggregation, and amelioration of blood coagulation (APTT, PT, TT, and FIB), which were superior to those of commercial anticoagulant urokinase. Velefibrinase showed no hemolysis for erythrocyte in vitro and no hemorrhagic activity in vivo. Finally, Velefibrinase effectively prevented mouse tail thrombosis in a dose-dependent (0.22–0.88 mg/kg) manner. These findings suggested that Velefibrinase has the potential to becoming a new thrombolytic agent.
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6
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Phull AR, Ahmed M, Park HJ. Cordyceps militaris as a Bio Functional Food Source: Pharmacological Potential, Anti-Inflammatory Actions and Related Molecular Mechanisms. Microorganisms 2022; 10:microorganisms10020405. [PMID: 35208860 PMCID: PMC8875674 DOI: 10.3390/microorganisms10020405] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Revised: 02/03/2022] [Accepted: 02/08/2022] [Indexed: 12/11/2022] Open
Abstract
Cordyceps militaris (C. militaris) is a medicinal mushroom possessing a variety of biofunctionalities. It has several biologically important components such as polysaccharides and others. The diverse pharmacological potential of C. militaris has generated interest in reviewing the current scientific literature, with a particular focus on prevention and associated molecular mechanisms in inflammatory diseases. Due to rising global demand, research on C. militaris has continued to increase in recent years. C. militaris has shown the potential for inhibiting inflammation-related events, both in in vivo and in vitro experiments. Inflammation is a multifaceted biological process that contributes to the development and severity of diseases, including cancer, colitis, and allergies. These functions make C. militaris a suitable functional food for inhibiting inflammatory responses such as the regulation of proinflammatory cytokines. Therefore, on the basis of existing information, the current study provides insights towards the understanding of anti-inflammatory activity-related mechanisms. This article presents a foundation for clinical use, and analyzes the roadmap for future studies concerning the medical use of C. militaris and its constituents in the next generation of anti-inflammatory drugs.
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Affiliation(s)
- Abdul-Rehman Phull
- Department of Food Science and Biotechnology, College of BioNano Technology, Gachon University, Seongnam 13120, Korea;
| | - Madiha Ahmed
- Shifa College of Pharmaceutical Sciences, Shifa Tameer-e-Millat University, Islamabad 44000, Pakistan;
| | - Hye-Jin Park
- Department of Food Science and Biotechnology, College of BioNano Technology, Gachon University, Seongnam 13120, Korea;
- Correspondence:
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Duan Y, Katrolia P, Zhong A, Kopparapu NK. Production, purification and characterization of a novel antithrombotic and anticoagulant serine protease from food grade microorganism Neurospora crassa. Prep Biochem Biotechnol 2022; 52:1008-1018. [PMID: 35000560 DOI: 10.1080/10826068.2021.2023824] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
A novel thrombolytic enzyme was produced by food grade microorganism Neurospora crassa using agro-industrial by-products as substrates. Process parameters were optimized using Plackett-Berman and Box-Benhken design. Under the optimized fermentation conditions, high fibrinolytic activity of 403.59 U/mL was obtained. It was purified with a specific activity of 3572.4 U/mg by ammonium sulfate precipitation and SP Sepharose chromatography. The molecular weight of the enzyme was approximately 32 kDa. It exhibited maximum activity at 40 °C and pH 7.4. Its activity was enhanced by Cu2+, Na+, Zn2+, and completely inhibited by phenylmethanesulfonyl fluoride, soybean trypsin inhibitor, aprotinin, which indicates it could be a serine protease. The enzyme could degrade fibrin clot directly without the need of plasminogen activator, and effectively cleaved Aα, Bβ, γ chains of fibrinogen. It could inhibit the formation of blood clots in vitro and acts as an anticoagulant. Compared to heparin the purified enzyme showed extended anticoagulant activity. Blood clots were dissolved effectively and dissolution rate was increased with time. Based on these results, this novel enzyme has the potential to be developed as a thrombolytic agent.
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Affiliation(s)
- Yajie Duan
- College of Food Science, Southwest University, Chongqing, China
| | - Priti Katrolia
- College of Food Science, Southwest University, Chongqing, China
| | - Ailing Zhong
- College of Food Science, Southwest University, Chongqing, China
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8
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Cao Y, Lu X, Dai Y, Li Y, Liu F, Zhou W, Li J, Zheng B. Proteomic analysis of body wall and coelomic fluid in Sipunculus nudus. FISH & SHELLFISH IMMUNOLOGY 2021; 111:16-24. [PMID: 33460719 DOI: 10.1016/j.fsi.2021.01.004] [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: 09/29/2020] [Revised: 12/29/2020] [Accepted: 01/11/2021] [Indexed: 06/12/2023]
Abstract
In order to make clear the protein compositions of Sipunculus nudus and investigate its immune-related proteins, proteomic analysis was performed on body wall and coelomic fluid of Sipunculus nudus. A total of 1659 proteins were identified, and 539 proteins were differentially expressed in the coelomic fluid compared to those in the body wall, of which 415 proteins were up-regulated while 124 proteins were down-regulated. Gene Ontology (GO) analysis showed that the GO terms involved in the two parts of Sipunculus nudus were similar, with metabolic processes, catalytic activity and cell occupying the top categories of biological process, molecular function and cellular component, respectively. KEGG pathway analysis showed that 49 pathways in body wall and 48 in coelomic fluid were mapped respectively, and these pathways were mainly related to cellular processes, environmental information processing, genetic information processing and metabolism. The COG analysis showed that 757 proteins from body wall and 889 from coelomic fluid were classified into 26 COG categories, respectively. Pfam annotation revealed the mainly immune-related proteins contained in Sipunculus nudus, such as insulin-like growth factor binding protein, catalase, basement membrane proteoglycan, titin. Our research provides the first proteomic information of Sipunculus nudus, which contributes to the study of functional proteins in Sipunculus nudus and is of great significance for the application of Sipunculus nudus in functional foods and medicines.
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Affiliation(s)
- Yupo Cao
- College of Food Science, Fujian Agriculture and Forestry University, Fuzhou, 350002, Fujian, China; Key Laboratory of Tropical Crop Products Processing of Ministry of Agriculture and Rural Affairs, Agricultural Products Processing Research Institute, Chinese Academy of Tropical Agricultural Sciences, Zhanjiang, 524001, Guangdong, China
| | - Xuli Lu
- Key Laboratory of Tropical Crop Products Processing of Ministry of Agriculture and Rural Affairs, Agricultural Products Processing Research Institute, Chinese Academy of Tropical Agricultural Sciences, Zhanjiang, 524001, Guangdong, China; Hainan Key Laboratory of Storage and Processing of Fruits and Vegetables, Zhanjiang, 524001, Guangdong, China
| | - Yaping Dai
- Key Laboratory of Tropical Crop Products Processing of Ministry of Agriculture and Rural Affairs, Agricultural Products Processing Research Institute, Chinese Academy of Tropical Agricultural Sciences, Zhanjiang, 524001, Guangdong, China; Hainan Key Laboratory of Storage and Processing of Fruits and Vegetables, Zhanjiang, 524001, Guangdong, China
| | - Yahui Li
- Key Laboratory of Tropical Crop Products Processing of Ministry of Agriculture and Rural Affairs, Agricultural Products Processing Research Institute, Chinese Academy of Tropical Agricultural Sciences, Zhanjiang, 524001, Guangdong, China; Hainan Key Laboratory of Storage and Processing of Fruits and Vegetables, Zhanjiang, 524001, Guangdong, China
| | - Fei Liu
- Key Laboratory of Tropical Crop Products Processing of Ministry of Agriculture and Rural Affairs, Agricultural Products Processing Research Institute, Chinese Academy of Tropical Agricultural Sciences, Zhanjiang, 524001, Guangdong, China; Hainan Key Laboratory of Storage and Processing of Fruits and Vegetables, Zhanjiang, 524001, Guangdong, China
| | - Wei Zhou
- Key Laboratory of Tropical Crop Products Processing of Ministry of Agriculture and Rural Affairs, Agricultural Products Processing Research Institute, Chinese Academy of Tropical Agricultural Sciences, Zhanjiang, 524001, Guangdong, China; Hainan Key Laboratory of Storage and Processing of Fruits and Vegetables, Zhanjiang, 524001, Guangdong, China
| | - Jihua Li
- Key Laboratory of Tropical Crop Products Processing of Ministry of Agriculture and Rural Affairs, Agricultural Products Processing Research Institute, Chinese Academy of Tropical Agricultural Sciences, Zhanjiang, 524001, Guangdong, China; Hainan Key Laboratory of Storage and Processing of Fruits and Vegetables, Zhanjiang, 524001, Guangdong, China.
| | - Baodong Zheng
- College of Food Science, Fujian Agriculture and Forestry University, Fuzhou, 350002, Fujian, China.
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9
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Barros PDSD, Silva PECE, Nascimento TP, Costa RMPB, Bezerra RP, Porto ALF. Fibrinolytic enzyme from Arthrospira platensis cultivated in medium culture supplemented with corn steep liquor. Int J Biol Macromol 2020; 164:3446-3453. [DOI: 10.1016/j.ijbiomac.2020.08.217] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Revised: 08/27/2020] [Accepted: 08/28/2020] [Indexed: 11/26/2022]
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Li G, Liu X, Cong S, Deng Y, Zheng X. A novel serine protease with anticoagulant and fibrinolytic activities from the fruiting bodies of mushroom Agrocybe aegerita. Int J Biol Macromol 2020; 168:631-639. [PMID: 33227332 DOI: 10.1016/j.ijbiomac.2020.11.118] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2020] [Revised: 11/16/2020] [Accepted: 11/16/2020] [Indexed: 12/29/2022]
Abstract
A novel fibrinolytic enzyme, ACase was isolated from fruiting bodies of a mushroom, Agrocybe aegerita. ACase was purified by using ammonium sulfate precipitation, gel filtration, ion exchange and hydrophobic chromatographies to 237.12 fold with a specific activity of 1716.77 U/mg. ACase was found to be a heterodimer with molecular mass of 31.4 and 21.2 kDa by SDS-PAGE and appeared as a single band on Native-PAGE and fibrin-zymogram. The N-terminal sequence of the two subunits of ACase was AIVTQTNAPWGL (subunit 1) and SNADGNGHGTHV (subunit 2). ACase had maximal activity at 47 °C and pH 7.6. It's activity was improved by Cu2+, Na+, Fe3+, Zn2+, Ba2+, K+ and Mn2+, but inhibited by Fe2+, Mg2+ and Ca2+. PMSF, SBTI, aprotinine and Lys inhibited the enzyme activity, which suggested that ACase was a serine protease. ACase could degrade all three chains (α, β and γ) of fibrinogen. Moreover, the enzyme acted as both, a plasmin-like fibrinolytic enzyme and a plasminogen activator. It could hydrolyze human thrombin slightly, which indicated that the ACase could inhibit the activity of thrombin and acted as an anticoagulant to prevent thrombosis. Based on these results, ACase might act as a therapeutic agent for treating thrombosis, or as a functional food. Further investigation of the enzyme is underway.
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Affiliation(s)
- Guanlong Li
- College of Food Science, Heilongjiang Bayi Agricultural University, Daqing 163319, PR China; Heilongjiang Provincial Key Laboratory of Corn Deep Processing Theory and Techology, College of Food and Bioengineering, Qiqihar University, Qiqihar 161006, PR China
| | - Xiaolan Liu
- College of Food Science, Heilongjiang Bayi Agricultural University, Daqing 163319, PR China; Heilongjiang Provincial Key Laboratory of Corn Deep Processing Theory and Techology, College of Food and Bioengineering, Qiqihar University, Qiqihar 161006, PR China.
| | - Shanzi Cong
- Heilongjiang Provincial Key Laboratory of Corn Deep Processing Theory and Techology, College of Food and Bioengineering, Qiqihar University, Qiqihar 161006, PR China
| | - Yongping Deng
- Heilongjiang Provincial Key Laboratory of Corn Deep Processing Theory and Techology, College of Food and Bioengineering, Qiqihar University, Qiqihar 161006, PR China
| | - Xiqun Zheng
- College of Food Science, Heilongjiang Bayi Agricultural University, Daqing 163319, PR China; Heilongjiang Provincial Key Laboratory of Corn Deep Processing Theory and Techology, College of Food and Bioengineering, Qiqihar University, Qiqihar 161006, PR China.
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11
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Moula Ali AM, Bavisetty SCB. Purification, physicochemical properties, and statistical optimization of fibrinolytic enzymes especially from fermented foods: A comprehensive review. Int J Biol Macromol 2020; 163:1498-1517. [PMID: 32781120 DOI: 10.1016/j.ijbiomac.2020.07.303] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2020] [Revised: 07/27/2020] [Accepted: 07/29/2020] [Indexed: 12/12/2022]
Abstract
Fibrinolytic enzymes are proteases responsible for cleavage of fibrin mesh in thrombus clots, which are the primary causative agents in cardiovascular diseases. Developing safe, effective and cheap thrombolytic agents are important for prevention and cure of thrombosis. Although a wide variety of sources have been discovered for fibrinolytic enzymes, only few of them have been employed in clinical and therapeutic applications due to the drawbacks such as high cost of production, low stability of enzyme or therapeutic side effects. However, the discovery of new fibrinolytic enzymes requires complex purification stages and characterization, which gives an insight into their diverse modes of action. Post-discovery, approaches such as a) statistical optimization for fermentative bioprocessing and b) genetic engineering are advantageous in providing economic viability by finding simple and cost-effective medium, strain development with sufficient nutrient supplements for stable and high-level production of recombinant enzyme. This review provides a comprehensive understanding of different sources, purification techniques, production through genetic engineering approaches and statistical optimization of fermentation parameters as proteases have a wide variety of industrial and biotechnological applications making 60% of total enzyme market worldwide. New strategies targeting increased enzyme yields, non-denaturing environments, improved stability, enzyme activity and strain improvement have been discussed.
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Affiliation(s)
- Ali Muhammed Moula Ali
- Department of Food Science and Technology, Faculty of Food-Industry, King Mongkut's Institute of Technology Ladkrabang, Bangkok 10520, Thailand
| | - Sri Charan Bindu Bavisetty
- Department of Fermentation Technology, Faculty of Food-Industry, King Mongkut's Institute of Technology Ladkrabang, Bangkok 10520, Thailand.
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12
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Yang H, Yang L, Li X, Li H, Tu Z, Wang X. Genome sequencing, purification, and biochemical characterization of a strongly fibrinolytic enzyme from Bacillus amyloliquefaciens Jxnuwx-1 isolated from Chinese traditional douchi. J GEN APPL MICROBIOL 2020; 66:153-162. [PMID: 31413231 DOI: 10.2323/jgam.2019.04.005] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2023]
Abstract
A strongly fibrinolytic enzyme was purified from Bacillus amyloliquefaciens Jxnuwx-1, found in Chinese traditional fermented black soya bean (douchi). The molecular mass of the enzyme, estimated by sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE), was 29 kDa. The optimal pH and temperature for the enzyme were 7.6 and 41°C, respectively. The enzyme was inhibited by phenylmethylsulfonyl fluoride, soybean trypsin inhibitor, ethylenediaminetetraacetic acid, Fe3+, and Fe2+. The highest affinity exhibited by the enzyme was towards N-Succinyl-Ala-Ala-Pro-Phe-pNA. These results indicated that it is a subtilisin-like serine metalloprotease. The enzyme degraded both fibrinogen and fibrin, displaying its highest degrading activity towards the Aα-chains followed by Bβ chains and Cγ chains. The enzyme was also activated by plasminogen, indicating its ability to degrade fibrinogen and fibrin in two ways: (a) by activating plasminogen conversion into plasmin, or (b) by direct hydrolysis. It degraded thrombin, suggesting that it may act as an anticoagulant to prevent thrombosis. Taken together, our results indicate the potential of this enzyme in controlling cardiovascular disease.
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Affiliation(s)
- Huilin Yang
- Key Lab of Protection and Utilization of Subtropic Plant Resources of Jiangxi Province, Jiangxi Normal University
| | - Lin Yang
- Key Lab of Protection and Utilization of Subtropic Plant Resources of Jiangxi Province, Jiangxi Normal University
| | - Xiang Li
- Key Lab of Protection and Utilization of Subtropic Plant Resources of Jiangxi Province, Jiangxi Normal University
| | - Hao Li
- Key Lab of Protection and Utilization of Subtropic Plant Resources of Jiangxi Province, Jiangxi Normal University
| | - Zongcai Tu
- Key Lab of Protection and Utilization of Subtropic Plant Resources of Jiangxi Province, Jiangxi Normal University
| | - Xiaolan Wang
- Key Lab of Protection and Utilization of Subtropic Plant Resources of Jiangxi Province, Jiangxi Normal University
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13
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Purification and characterization of a novel fibrinolytic enzyme from Whitmania pigra Whitman. Protein Expr Purif 2020; 174:105680. [PMID: 32497576 DOI: 10.1016/j.pep.2020.105680] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Revised: 05/02/2020] [Accepted: 05/21/2020] [Indexed: 11/22/2022]
Abstract
Developing an effective fibrinolytic drug for treating thrombolysis with minimal undesirable side effects is of great importance. In the current study, an optimum solvent was selected for the extraction of fibrinolytic active components. Furthermore, a strong fibrinolytic enzyme named WPI01 was purified from Whitmania pigra Whitman through various chromatographic steps. WPI01 has a molecular mass of 27044.297 Da, and the N-terminal 8 amino acid sequence was determined as VVGGVEAR. WPI01 was stable within the pH range of 6.0-10.0 and with maximum fibrinolytic activity at 40 °C and a pH of 8.0. At 500 U/mL, WPI01 induced 50.59% blood clot reduction in vitro within 6 h, which was higher than that induced by urokinase at 1000 U/mL. In an analysis of the plasminogen activator activity, WPI01 produced obvious halos on heated and unheated fibrin plates, suggesting that WPI01 may not only act as a plasminogen activator but also degrade fibrin clots directly, and more study is needed to support this. In conclusion, WPI01 is obviously different from known fibrinolytic enzymes in terms of substrate specificity and fibrinolytic mode of action, suggesting that it is a novel fibrinolytic enzyme with potential applications in the treatment and prevention of thrombosis.
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Dong H, Liu J, Zeng X, Bai W, Yu L. Enzymatic hydrolysis pretreatment for enhancing the protein solubility and physicochemical quality of Cordyceps militaris chicken soup. Food Sci Nutr 2020; 8:2436-2444. [PMID: 32405400 PMCID: PMC7215234 DOI: 10.1002/fsn3.1533] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Revised: 02/20/2020] [Accepted: 02/21/2020] [Indexed: 01/05/2023] Open
Abstract
Chicken soup is one of the most popular Chinese-style soups due to its high nutritional value and special flavor. However, the nutrients, mainly soluble protein, in the soup are relatively low. The aim of the present work was to enhance the protein solubility and other physicochemical properties of Cordyceps militaris chicken soup by enzymatic hydrolysis pretreatment. Results indicated that the soluble protein dissolution rate and flavor nucleotides (I+G) of Cordyceps militaris chicken soup had 1.6-fold and 0.5-fold increase, respectively, after enzymatic hydrolysis pretreatment. Not only the contents of total amino acids (TAA) and essential amino acids (EAA) in Cordyceps militaris chicken soup significantly increased, the organoleptic quality was also markedly improved after the enzymatic hydrolysis pretreatment. The present work provides a potential approach, which is enzymatic hydrolysis pretreatment of chicken meat, to enhance the protein solubility and physicochemical quality of Cordyceps militaris chicken soup.
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Affiliation(s)
- Hao Dong
- College of Light Industry and Food SciencesZhongkai University of Agriculture and EngineeringGuangzhouChina
| | - Jialing Liu
- College of Light Industry and Food SciencesZhongkai University of Agriculture and EngineeringGuangzhouChina
| | - Xiaofang Zeng
- College of Light Industry and Food SciencesZhongkai University of Agriculture and EngineeringGuangzhouChina
| | - Weidong Bai
- College of Light Industry and Food SciencesZhongkai University of Agriculture and EngineeringGuangzhouChina
| | - Limei Yu
- College of Light Industry and Food SciencesZhongkai University of Agriculture and EngineeringGuangzhouChina
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15
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Gene cloning, expression and homology modeling of first fibrinolytic enzyme from mushroom (Cordyceps militaris). Int J Biol Macromol 2019; 146:897-906. [PMID: 31726136 DOI: 10.1016/j.ijbiomac.2019.09.212] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2019] [Revised: 09/09/2019] [Accepted: 09/21/2019] [Indexed: 01/12/2023]
Abstract
Fibrinolytic enzymes are important thrombolytic agents for blood-clotting disorders like cardiovascular diseases. Availability of novel recombinant fibrinolytic enzymes can overcome the shortcomings of current thrombolytic drugs. With the objective of facilitating their cost-effective production for therapeutic applications and for gaining deeper insight into their structure-function, we have cloned and expressed the first fibrinolytic protease gene from Cordyceps militaris. Cordyceps militaris fibrinolytic enzyme (CmFE) has one open reading frame of 759 bp encoding "pre-pro-protein" of 252 amino acids. Recombinant CmFE was expressed as 28 kDa extracellular enzyme in Pichia pastoris which was capable of degrading fibrin clot. A structure homology model of CmFE was developed using urokinase-type plasminogen activator. The active site contains catalytic triad His41, Asp83, Ser177 and consensus sequence of GDSGG. The substrate binding residues are Asp (171), Gly (194) and Ser (192). Its trypsin-like specificity is determined by the critical Asp171 in S1 subsite. The "oxyanion hole" is formed by backbone amide hydrogen atoms of Gly-175 and Ser-177. CmFE contains six conserved cysteines forming three disulfide linkages. This is the first study describing cloning, expression and prediction of structure-function relationship of a mushroom fibrinolytic protease. Hence it has great relevance in application of fibrinolytic enzymes as thrombolytic agents.
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Hu Y, Yu D, Wang Z, Hou J, Tyagi R, Liang Y, Hu Y. Purification and characterization of a novel, highly potent fibrinolytic enzyme from Bacillus subtilis DC27 screened from Douchi, a traditional Chinese fermented soybean food. Sci Rep 2019; 9:9235. [PMID: 31239529 PMCID: PMC6592948 DOI: 10.1038/s41598-019-45686-y] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Accepted: 05/30/2019] [Indexed: 01/16/2023] Open
Abstract
The highly fibrinolytic enzyme-producing bacterium was identified as Bacillus subtilis DC27 and isolated from Douchi, a traditional fermented soybean food. The DFE27 enzyme was purified from the fermentation broth of B. subtilis DC27 by using UNOsphere Q column chromatography, Sephadex G-75 gel filtration, and high-performance liquid chromatography. It was 29 kDa in molecular mass and showed the optimal reaction temperature and pH value of 45 °C and 7.0, respectively, with a stable fibrinolytic activity below 50 °C and within the pH range of 6.0 to 10.0. DFE27 was identified as a serine protease due to its complete inhibition by phenylmethysulfony fluoride. The first 24 amino acid residues of the N-terminal sequence of the enzyme were AQSVPYGVSQIKAPALHSQGFTGS. The enzyme displayed the highest specificity toward the substrate D-Val-Leu-Lys-pNA for plasmin and it could not only directly degrade but also hydrolyze fibrin by activating plasminogen into plasmin. Overall, the DFE27 enzyme was obviously different from other known fibrinolytic enzymes in the optimum substrate specificity or fibrinolytic action mode, suggesting that it is a novel fibrinolytic enzyme and may have potential applications in the treatment and prevention of thrombosis.
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Affiliation(s)
- Yuanliang Hu
- State Key Laboratory of Agricultural Microbiology, College of Life Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China
- Hubei Key Laboratory of Edible Wild Plants Conservation& Utilization, College of Life Sciences, Hubei Normal University, Huangshi, 435002, China
| | - Dan Yu
- State Key Laboratory of Agricultural Microbiology, College of Life Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China
| | - Zhaoting Wang
- State Key Laboratory of Agricultural Microbiology, College of Life Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China
| | - Jianjun Hou
- Hubei Key Laboratory of Edible Wild Plants Conservation& Utilization, College of Life Sciences, Hubei Normal University, Huangshi, 435002, China
| | - Rohit Tyagi
- State Key Laboratory of Agricultural Microbiology, College of Life Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China
| | - Yunxiang Liang
- State Key Laboratory of Agricultural Microbiology, College of Life Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China.
- Hubei Collaborative Innovation Center for Industrial Fermentation, Wuhan, 430068, China.
| | - Yongmei Hu
- State Key Laboratory of Agricultural Microbiology, College of Life Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China.
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Xin X, Ambati RR, Cai Z, Lei B. Development of universal purification protocols for fibrinolytic enzyme-producing bacilli. CYTA - JOURNAL OF FOOD 2019. [DOI: 10.1080/19476337.2018.1561521] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Xiong Xin
- Food Science and Technology Program, Beijing Normal University-Hong Kong Baptist University United International College, Zhuhai, Guangdong, China
- State Key Laboratory of Environmental and Biological Analysis, Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong Special Administrative Region, China
| | - Ranga Rao Ambati
- Food Science and Technology Program, Beijing Normal University-Hong Kong Baptist University United International College, Zhuhai, Guangdong, China
- Zhuhai Key Laboratory of Agriculture Product Quality and Food Safety, Zhuhai, Guangdong, China
- Department of Biotechnology, Vignan’s Foundation for Science, Technology and Research University (VFSTRU), Guntur, Andhra Pradesh, India
| | - Zongwei Cai
- State Key Laboratory of Environmental and Biological Analysis, Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong Special Administrative Region, China
- Zhuhai Key Laboratory of Agriculture Product Quality and Food Safety, Zhuhai, Guangdong, China
| | - Bo Lei
- Food Science and Technology Program, Beijing Normal University-Hong Kong Baptist University United International College, Zhuhai, Guangdong, China
- Zhuhai Key Laboratory of Agriculture Product Quality and Food Safety, Zhuhai, Guangdong, China
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18
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Deng Y, Liu X, Katrolia P, Kopparapu NK, Zheng X. A dual-function chymotrypsin-like serine protease with plasminogen activation and fibrinolytic activities from the GRAS fungus, Neurospora sitophila. Int J Biol Macromol 2018; 109:1338-1343. [DOI: 10.1016/j.ijbiomac.2017.11.142] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2016] [Revised: 07/18/2017] [Accepted: 11/22/2017] [Indexed: 11/26/2022]
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19
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The potential applications of mushrooms against some facets of atherosclerosis: A review. Food Res Int 2018; 105:517-536. [DOI: 10.1016/j.foodres.2017.11.023] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Revised: 11/08/2017] [Accepted: 11/19/2017] [Indexed: 12/16/2022]
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Narasimhan MK, Ethiraj S, Krishnamurthi T, Rajesh M. Purification, biochemical, and thermal properties of fibrinolytic enzyme secreted by Bacillus cereus SRM-001. Prep Biochem Biotechnol 2018; 48:34-42. [PMID: 29106326 DOI: 10.1080/10826068.2017.1387560] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
The discovery of microbial fibrinolytic enzymes is essential to treat cardiovascular diseases. This study reports the discovery of a fibrinolytic enzyme secreted by Bacillus cereus SRM-001, a microorganism isolated from the soil of a chicken waste-dump yard. The B. cereus SRM-001 was cultured and the secreted fibrinolytic enzyme purified to show that it is a ∼28 kDa protein. The purified enzyme was characterized for its kinetics, biochemical and thermal properties to show that it possesses properties similar to plasmin. A HPLC-MS/MS analysis of trypsin digested protein indicated that the fibrinolytic enzyme shared close sequence homology with serine proteases reported for other Bacillus sp. The results show that the B. cereus SRM-001 secreted enzyme is a ∼28 kDa serine protease that possesses fibrinolytic potential.
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Affiliation(s)
- Manoj Kumar Narasimhan
- a Department of Genetic Engineering, School of Bioengineering , SRM University , Kattankulathur , Tamil Nadu , India
| | - Selvarajan Ethiraj
- a Department of Genetic Engineering, School of Bioengineering , SRM University , Kattankulathur , Tamil Nadu , India
| | - Tamilarasan Krishnamurthi
- b Department of Chemical Engineering , School of Bioengineering, SRM University , Kattankulathur , Tamil Nadu , India
| | - Mathur Rajesh
- b Department of Chemical Engineering , School of Bioengineering, SRM University , Kattankulathur , Tamil Nadu , India
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Biochemical characterization of a novel fibrinolytic enzyme from Cordyceps militaris. Int J Biol Macromol 2017; 94:793-801. [DOI: 10.1016/j.ijbiomac.2016.09.048] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2015] [Revised: 08/31/2016] [Accepted: 09/15/2016] [Indexed: 11/22/2022]
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22
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Purification and characterization of a fibrinolytic enzyme from the food-grade fungus, Neurospora sitophila. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.molcatb.2016.10.006] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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23
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Chu F, Wang X, Sun Q, Liang H, Wang S, An D, Cui C, Chai Y, Li S, Song S, Ji A. Purification and characterization of a novel fibrinolytic enzyme from Whitmania pigra Whitman. Clin Exp Hypertens 2016; 38:594-601. [PMID: 27668456 DOI: 10.3109/10641963.2016.1174254] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
A fibrinolytic enzyme was purified from the dry body of Whitmania pigra Whitman. The fibrinolytic enzyme was purified to homogeneity with a yield of 0.003% and a purification of 630.7 fold. The molecular weight of the enzyme was estimated to be 26.7 kDa by reduced sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE). The enzyme was tested by matrix-assisted laser desorption/ionization time of flight mass spectrometry (MALDI-TOF-MS) and it showed that the enzyme was a novel fibrinolytic enzyme. The optimal pH and temperature of the enzyme were 8.5 and 55°C, respectively. Enzyme activity was enhanced by Na+, Mg2+, and K+. On the contrary, the proteolytic activity was significantly inhibited by Mn2+, Fe2+, Fe3+, ethylenediaminetetraacetic acid (EDTA), and ethylenebis(oxyethylenenitrilo)tetraacetic acid (EGTA). Fibrinolytic and fibrinogenolytic assays showed that the enzyme preferentially hydrolyzed fibrinogen Aα-chains, followed by Bβ- and γ-chains. The α-, β-, and γ-γ-chains of fibrin were also degraded by the enzyme.
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Affiliation(s)
- Fulong Chu
- a Marine College, Shandong University , Weihai , China.,b Weihai International Biotechnology Research and Development Center, Shandong University , Weihai , China
| | - Xiaochen Wang
- a Marine College, Shandong University , Weihai , China.,b Weihai International Biotechnology Research and Development Center, Shandong University , Weihai , China
| | - Qianqian Sun
- a Marine College, Shandong University , Weihai , China.,b Weihai International Biotechnology Research and Development Center, Shandong University , Weihai , China
| | - Hao Liang
- a Marine College, Shandong University , Weihai , China.,b Weihai International Biotechnology Research and Development Center, Shandong University , Weihai , China
| | - Sijian Wang
- d Zaozhuang Mining Group Central Hospital , Zaozhuang , China
| | - Dengkun An
- a Marine College, Shandong University , Weihai , China.,b Weihai International Biotechnology Research and Development Center, Shandong University , Weihai , China
| | - Chao Cui
- a Marine College, Shandong University , Weihai , China.,b Weihai International Biotechnology Research and Development Center, Shandong University , Weihai , China
| | - Yuchao Chai
- a Marine College, Shandong University , Weihai , China.,b Weihai International Biotechnology Research and Development Center, Shandong University , Weihai , China
| | - Shuaishuai Li
- a Marine College, Shandong University , Weihai , China.,b Weihai International Biotechnology Research and Development Center, Shandong University , Weihai , China
| | - Shuliang Song
- a Marine College, Shandong University , Weihai , China.,b Weihai International Biotechnology Research and Development Center, Shandong University , Weihai , China
| | - Aiguo Ji
- a Marine College, Shandong University , Weihai , China.,b Weihai International Biotechnology Research and Development Center, Shandong University , Weihai , China.,c School of Pharmaceutical Sciences, Shandong University , Jinan , China
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