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Xu T, Wang YC, Ma J, Cui Y, Wang L. In silico discovery and anti-tumor bioactivities validation of an algal lectin from Kappaphycus alvarezii genome. Int J Biol Macromol 2024; 275:133311. [PMID: 38909728 DOI: 10.1016/j.ijbiomac.2024.133311] [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] [Received: 02/01/2024] [Revised: 05/24/2024] [Accepted: 06/13/2024] [Indexed: 06/25/2024]
Abstract
Lectins are proteins that bind specifically and reversibly to carbohydrates, and some of them have significant anti-tumor activities. Compared to those of lectins from land plants, there are far fewer studies on algal lectins, despite of the high biodiversity of algae. However, canonical strategies based on chromatographic feature-oriented screening cannot satisfy the requirement for algal lectin discovery. In this study, prospecting for novel OAAH family lectins throughout 358 genomes of red algae and cyanobacteria was conducted. Then 35 candidate lectins and 1843 of their simulated mutated forms were virtually screened based on predicted binding specificities to characteristic carbohydrates on cancer cells inferred by a deep learning model. A new lectin, named Siye, was discovered in Kappaphycus alvarezii genome and further verified on different cancer cells. Without causing agglutination of erythrocytes, Siye showed significant cytotoxicity to four human cancer cell lines (IC50 values ranging from 0.11 to 3.95 μg/mL), including breast adenocarcinoma HCC1937, lung carcinoma A549, liver cancer HepG2 and romyelocytic leukemia HL60. And the cytotoxicity was induced through promoting apoptosis by regulating the caspase and the p53 pathway within 24 h. This study testifies the feasibility and efficiency of the genome mining guided by evolutionary theory and artificial intelligence in the discovery of algal lectins.
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Affiliation(s)
- Tongli Xu
- Key Laboratory of Coastal Biology and Biological Resource Utilization, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China; Qingdao Academy of Chinese Medical Sciences, Shandong University of Traditional Chinese Medicine, Qingdao 266071, China
| | - Yin-Chu Wang
- Key Laboratory of Coastal Biology and Biological Resource Utilization, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China; Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China; National Basic Science Data Center, Beijing 100190, China.
| | - Jiahao Ma
- Hong Kong University of Science and Technology, Clear Water Bay, 999077, Hong Kong
| | - Yulin Cui
- Binzhou Medical University, Yantai 264003, China.
| | - Lu Wang
- School of Pharmacy, Yantai University, Yantai 264005, China.
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2
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Mu J, Hirayama M, Morimoto K, Hori K. A Complex-Type N-Glycan-Specific Lectin Isolated from Green Alga Halimeda borneensis Exhibits Potent Anti-Influenza Virus Activity. Int J Mol Sci 2024; 25:4345. [PMID: 38673930 PMCID: PMC11050134 DOI: 10.3390/ijms25084345] [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: 03/19/2024] [Revised: 04/09/2024] [Accepted: 04/10/2024] [Indexed: 04/28/2024] Open
Abstract
Marine algal lectins specific for high-mannose N-glycans have attracted attention because they strongly inhibit the entry of enveloped viruses, including influenza viruses and SARS-CoV-2, into host cells by binding to high-mannose-type N-glycans on viral surfaces. Here, we report a novel anti-influenza virus lectin (named HBL40), specific for complex-type N-glycans, which was isolated from a marine green alga, Halimeda borneensis. The hemagglutination activity of HBL40 was inhibited with both complex-type N-glycan and O-glycan-linked glycoproteins but not with high-mannose-type N-glycan-linked glycoproteins or any of the monosaccharides examined. In the oligosaccharide-binding experiment using 26 pyridylaminated oligosaccharides, HBL40 only bound to complex-type N-glycans with bi- and triantennary-branched sugar chains. The sialylation, core fucosylation, and the increased number of branched antennae of the N-glycans lowered the binding activity with HBL40. Interestingly, the lectin potently inhibited the infection of influenza virus (A/H3N2/Udorn/72) into NCI-H292 cells at IC50 of 8.02 nM by binding to glycosylated viral hemagglutinin (KD of 1.21 × 10-6 M). HBL40 consisted of two isolectins with slightly different molecular masses to each other that could be separated by reverse-phase HPLC. Both isolectins shared the same 16 N-terminal amino acid sequences. Thus, HBL40 could be useful as an antivirus lectin specific for complex-type N-glycans.
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Affiliation(s)
- Jinmin Mu
- Graduate School of Biosphere Science, Hiroshima University, Kagamiyama 1-4-4, Higashi-Hiroshima 739-8528, Japan; (J.M.); (M.H.)
| | - Makoto Hirayama
- Graduate School of Biosphere Science, Hiroshima University, Kagamiyama 1-4-4, Higashi-Hiroshima 739-8528, Japan; (J.M.); (M.H.)
- Graduate School of Integrated Sciences for Life, Hiroshima University, Kagamiyama 1-4-4, Higashi-Hiroshima 739-8528, Japan
| | - Kinjiro Morimoto
- Faculty of Pharmacy, Yasuda Women’s University, Yasuhigashi 6-13-1, Asaminami-Ku, Hiroshima 731-0153, Japan;
| | - Kanji Hori
- Graduate School of Biosphere Science, Hiroshima University, Kagamiyama 1-4-4, Higashi-Hiroshima 739-8528, Japan; (J.M.); (M.H.)
- Graduate School of Integrated Sciences for Life, Hiroshima University, Kagamiyama 1-4-4, Higashi-Hiroshima 739-8528, Japan
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3
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Ghadiri N, Javidan M, Sheikhi S, Taştan Ö, Parodi A, Liao Z, Tayybi Azar M, Ganjalıkhani-Hakemi M. Bioactive peptides: an alternative therapeutic approach for cancer management. Front Immunol 2024; 15:1310443. [PMID: 38327525 PMCID: PMC10847386 DOI: 10.3389/fimmu.2024.1310443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Accepted: 01/08/2024] [Indexed: 02/09/2024] Open
Abstract
Cancer is still considered a lethal disease worldwide and the patients' quality of life is affected by major side effects of the treatments including post-surgery complications, chemo-, and radiation therapy. Recently, new therapeutic approaches were considered globally for increasing conventional cancer therapy efficacy and decreasing the adverse effects. Bioactive peptides obtained from plant and animal sources have drawn increased attention because of their potential as complementary therapy. This review presents a contemporary examination of bioactive peptides derived from natural origins with demonstrated anticancer, ant invasion, and immunomodulation properties. For example, peptides derived from common beans, chickpeas, wheat germ, and mung beans exhibited antiproliferative and toxic effects on cancer cells, favoring cell cycle arrest and apoptosis. On the other hand, peptides from marine sources showed the potential for inhibiting tumor growth and metastasis. In this review we will discuss these data highlighting the potential befits of these approaches and the need of further investigations to fully characterize their potential in clinics.
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Affiliation(s)
- Nooshin Ghadiri
- Department of Immunology, Faculty of Medicine, Ahvaz Jundishapour University of Medical Sciences, Ahvaz, Iran
| | - Moslem Javidan
- Department of Immunology, Faculty of Medicine, Ahvaz Jundishapour University of Medical Sciences, Ahvaz, Iran
| | - Shima Sheikhi
- Department of Immunology, Faculty of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Özge Taştan
- Department of Food Engineering, Faculty of Engineering, Yeditepe University, Istanbul, Türkiye
| | - Alessandro Parodi
- Scientific Center for Translation Medicine, Sirius University of Science and Technology, Sochi, Russia
| | - Ziwei Liao
- Department of Hematology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China
| | - Mehdi Tayybi Azar
- Department of Biophysics, Faculty of Medicine, Yeditepe University, Istanbul, Türkiye
| | - Mazdak Ganjalıkhani-Hakemi
- Department of Immunology, Faculty of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
- Regenerative and Restorative Medicine Research Center (REMER), Research Institute for Health Sciences and Technologies (SABITA), Istanbul Medipol University, Istanbul, Türkiye
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4
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Chaves RP, Dos Santos AKB, Andrade AL, Pinheiro ADA, Silva JMDS, da Silva FMS, de Sousa JP, Barroso Neto IL, Bezerra EHS, Abreu JO, de Carvalho FCT, de Sousa OV, de Sousa BL, da Rocha BAM, Silva ALC, do Nascimento Neto LG, de Vasconcelos MA, Teixeira EH, Carneiro RF, Sampaio AH, Nagano CS. Structural study and antimicrobial and wound healing effects of lectin from Solieria filiformis (Kützing) P.W.Gabrielson. Biochimie 2023; 214:61-76. [PMID: 37301421 DOI: 10.1016/j.biochi.2023.05.016] [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] [Received: 03/07/2023] [Revised: 05/12/2023] [Accepted: 05/29/2023] [Indexed: 06/12/2023]
Abstract
The SfL-1 isoform from the marine red algae Solieria filiformis was produced in recombinant form (rSfL-1) and showed hemagglutinating activity and inhibition similar to native SfL. The analysis of circular dichroism revealed the predominance of β-strands structures with spectra of βI-proteins for both lectins, which had Melting Temperature (Tm) between 41 °C and 53 °C. The three-dimensional structure of the rSfL-1 was determined by X-ray crystallography, revealing that it is composed of two β-barrel domains formed by five antiparallel β chains linked by a short peptide between the β-barrels. SfL and rSfL-1 were able to agglutinate strains of Escherichia coli and Staphylococcus aureus and did not show antibacterial activity. However, SfL induced a reduction in E. coli biomass at concentrations from 250 to 125 μg mL-1, whereas rSfL-1 induced reduction in all concentrations tested. Additionally, rSfL-1 at concentrations from 250 to 62.5 μg mL-1, showed a statistically significant reduction in the number of colony-forming units, which was not noticed for SfL. Wound healing assay showed that the treatments with SfL and rSfL-1 act in reducing the inflammatory response and in the activation and proliferation of fibroblasts by a larger and fast deposition of collagen.
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Affiliation(s)
- Renata Pinheiro Chaves
- Departamento de Engenharia de Pesca, Universidade Federal do Ceará, Campus do Pici, Fortaleza, Ceará, Brazil
| | | | - Alexandre Lopes Andrade
- Departamento de Patologia e Medicina Legal, Universidade Federal do Ceará, Campus do Porangabuçu, Fortaleza, Ceará, Brazil
| | - Aryane de Azevedo Pinheiro
- Departamento de Patologia e Medicina Legal, Universidade Federal do Ceará, Campus do Porangabuçu, Fortaleza, Ceará, Brazil; Curso de Medicina, Centro Universitário INTA, UNINTA, Itapipoca, CE, Brazil
| | | | | | - Jucilene Pereira de Sousa
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Ceará, Campus do Pici, Fortaleza, Ceará, Brazil
| | - Ito Liberato Barroso Neto
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Ceará, Campus do Pici, Fortaleza, Ceará, Brazil; Curso de Medicina, Centro Universitário Unichristus, Fortaleza, Ceará, Brazil
| | - Eduardo Henrique Salviano Bezerra
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Ceará, Campus do Pici, Fortaleza, Ceará, Brazil; Laboratório Nacional de Biociências, Centro Nacional de Pesquisa em Energia e Materiais, Cidade Universitária, Campinas, São Paulo, Brazil
| | - Jade Oliveira Abreu
- Instituto de Ciências do Mar - Labomar, Universidade Federal do Ceará, Fortaleza, CE, Brazil
| | | | - Oscarina Viana de Sousa
- Instituto de Ciências do Mar - Labomar, Universidade Federal do Ceará, Fortaleza, CE, Brazil
| | - Bruno Lopes de Sousa
- Faculdade de Filosofia Dom Aureliano Matos, Universidade Estadual do Ceará, Limoeiro do Norte, CE, Brazil
| | - Bruno Anderson Matias da Rocha
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Ceará, Campus do Pici, Fortaleza, Ceará, Brazil
| | - André Luis Coelho Silva
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Ceará, Campus do Pici, Fortaleza, Ceará, Brazil
| | - Luiz Gonzaga do Nascimento Neto
- Departamento de Patologia e Medicina Legal, Universidade Federal do Ceará, Campus do Porangabuçu, Fortaleza, Ceará, Brazil; Curso de Licenciatura em Ciências Biológicas, Instituto Federal de Educação, Ciência e Tecnologia do Ceará, Campus Acaraú, Acaraú, CE, Brazil
| | - Mayron Alves de Vasconcelos
- Departamento de Patologia e Medicina Legal, Universidade Federal do Ceará, Campus do Porangabuçu, Fortaleza, Ceará, Brazil; Universidade do Estado de Minas Gerais, Unidade de Divinopolis, Divinopolis, MG, Brazil
| | - Edson Holanda Teixeira
- Departamento de Patologia e Medicina Legal, Universidade Federal do Ceará, Campus do Porangabuçu, Fortaleza, Ceará, Brazil
| | - Rômulo Farias Carneiro
- Departamento de Engenharia de Pesca, Universidade Federal do Ceará, Campus do Pici, Fortaleza, Ceará, Brazil
| | - Alexandre Holanda Sampaio
- Departamento de Engenharia de Pesca, Universidade Federal do Ceará, Campus do Pici, Fortaleza, Ceará, Brazil
| | - Celso Shiniti Nagano
- Departamento de Engenharia de Pesca, Universidade Federal do Ceará, Campus do Pici, Fortaleza, Ceará, Brazil.
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5
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Sanniyasi E, Gopal RK, Raj PP, Shanmugavel AK. Anti-inflammatory, remorin-like protein from green marine Macroalga Caulerpa sertularioides (S.G.Gmel.) M.Howe. Heliyon 2023; 9:e19239. [PMID: 37664755 PMCID: PMC10468388 DOI: 10.1016/j.heliyon.2023.e19239] [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: 11/21/2022] [Revised: 07/31/2023] [Accepted: 08/16/2023] [Indexed: 09/05/2023] Open
Abstract
The most prevalent natural source of hydrocolloids, cosmetics, medications, and nutraceuticals is marine seaweed (macroalgae). Numerous bioactivities, including antiviral, anticancer, anti-inflammatory, and immunomodulatory characteristics, have been found in bioactive substances such as polyphenols and sulfated and non-sulfated polysaccharides. As a result, new start-up projects and industries based on seaweed are emerging in all regions of the world with abundant marine biodiversity. In this current investigation, the anti-inflammatory activity of two different marine macroalgae Caulerpa racemosa (CR) and Caulerpa sertularioides (CS) was evaluated. Consequently, CS demonstrated more anti-inflammatory and antioxidant effects at a lower dose than CR. The IC50 value for DPPH inhibition was 456.1 μg/mL, and 180.9 μg/mL for CS and CR respectively. A similar result was obtained in the case of protein denaturation (PD), membrane stabilization (MS), and protease inhibition (PI) anti-inflammatory assays with 127.2 μg/mL, 135.5 μg/mL, and 71.88 μg/mL for CR, and 66.78 μg/mL, 88.96 μg/mL, and 59.54 μg/mL for CS respectively. Based on the SDS-PAGE, the molecular weight of lectin responsible for the anti-inflammatory activity was determined as 17 kDa. Protein mass fingerprinting was performed for the particular lectin by in-gel trypsin digestion, MALDI-MS analysis, and Mascot peptide mass fingerprinting. Because of this, the unidentified lectin protein was discovered to be a remorin-like protein that shared 65% of its sequence with the remorin-like protein of Aegilops tauschii subsp. tauschii. Therefore, it is the hitherto report on the presence of remorin-like protein from the green macroalga Caulerpa sertularioides.
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Affiliation(s)
- Elumalai Sanniyasi
- Department of Biotechnology, University of Madras, Guindy Campus, Chennai, 600025, India
| | - Rajesh Kanna Gopal
- Department of Microbiology, Saveetha Dental College & Hospitals, Saveetha Institute of Medical and Technical Sciences, Chennai, 600077, India
| | - Preethy P. Raj
- Department of Biotechnology, University of Madras, Guindy Campus, Chennai, 600025, India
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Nazmul T, Lawal-Ayinde BM, Morita T, Yoshimoto R, Higashiura A, Yamamoto A, Nomura T, Nakano Y, Hirayama M, Kurokawa H, Kitamura Y, Hori K, Sakaguchi T. Capture and neutralization of SARS-CoV-2 and influenza virus by algae-derived lectins with high-mannose and core fucose specificities. Microbiol Immunol 2023. [PMID: 37248051 DOI: 10.1111/1348-0421.13082] [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: 12/09/2022] [Revised: 05/02/2023] [Accepted: 05/14/2023] [Indexed: 05/31/2023]
Abstract
We first investigated the interactions between several algae-derived lectins and severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2). We created lectin columns using high-mannose (HM)-type glycan-specific lectins OAA and KAA-1 or core fucose-specific lectin hypninA-2 and conducted binding experiments with SARS-CoV-2. The results showed that these lectins were capable of binding to the virus. Furthermore, when examining the neutralization ability of nine different lectins, it was found that KAA-1, ESA-2, and hypninA-2 were effective in neutralizing SARS-CoV-2. In competitive inhibition experiments with glycoproteins, neutralization was confirmed to occur through HM-type or core fucose-type glycans. However, neutralization was not observed with other lectins, such as OAA. This trend of KAA-1 and ESA-2 having the neutralizing ability and OAA not having it was also similar to influenza viruses. Electron microscopy observations revealed that KAA-1 and hypninA-2 strongly aggregated SARS-CoV-2 particles, while OAA showed a low degree of aggregation. It is believed that the neutralization of SARS-CoV-2 involves multiple factors, such as glycan attachment sites on the S protein, the size of lectins, and their propensity to aggregate, which cause inhibition of receptor binding or aggregation of virus particles. This study demonstrated that several algae-derived lectins could neutralize SARS-CoV-2 and that lectin columns can effectively recover and concentrate the virus.
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Affiliation(s)
- Tanuza Nazmul
- Department of Virology, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Basirat M Lawal-Ayinde
- Department of Virology, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Tomoko Morita
- Department of Virology, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Reiko Yoshimoto
- Department of Virology, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Akifumi Higashiura
- Department of Virology, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Akima Yamamoto
- Department of Virology, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Toshihito Nomura
- Department of Virology, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
- Department of Infectious Diseases, Hiroshima University Hospital, Hiroshima, Japan
| | - Yukiko Nakano
- Laboratory of Marine Bioresource Chemistry, Graduate School of Integrated Sciences for Life, Hiroshima University, Higashi-Hiroshima, Japan
| | - Makoto Hirayama
- Laboratory of Marine Bioresource Chemistry, Graduate School of Integrated Sciences for Life, Hiroshima University, Higashi-Hiroshima, Japan
| | | | | | - Kanji Hori
- Laboratory of Marine Bioresource Chemistry, Graduate School of Integrated Sciences for Life, Hiroshima University, Higashi-Hiroshima, Japan
| | - Takemasa Sakaguchi
- Department of Virology, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
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7
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Priyadarsani Mandhata C, Ranjan Sahoo C, Nath Padhy R. A comprehensive overview on the role of phytocompounds in human immunodeficiency virus treatment. JOURNAL OF INTEGRATIVE MEDICINE 2023:S2095-4964(23)00040-7. [PMID: 37244763 DOI: 10.1016/j.joim.2023.05.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Accepted: 03/21/2023] [Indexed: 05/29/2023]
Abstract
Acquired immune deficiency syndrome (AIDS) is a worldwide epidemic caused by human immunodeficiency virus (HIV) infection. Newer medicines for eliminating the viral reservoir and eradicating the virus are urgently needed. Attempts to locate relatively safe and non-toxic medications from natural resources are ongoing now. Natural-product-based antiviral candidates have been exploited to a limited extent. However, antiviral research is inadequate to counteract for the resistant patterns. Plant-derived bioactive compounds hold promise as powerful pharmacophore scaffolds, which have shown anti-HIV potential. This review focuses on a consideration of the virus, various possible HIV-controlling methods and the recent progress in alternative natural compounds with anti-HIV activity, with a particular emphasis on recent results from natural sources of anti-HIV agents. Please cite this article as: Mandhata CP, Sahoo CR, Padhy RN. A comprehensive overview on the role of phytocompounds in human immunodeficiency virus treatment. J Integr Med. 2023; Epub ahead of print.
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Affiliation(s)
- Chinmayee Priyadarsani Mandhata
- Central Research Laboratory, Institute of Medical Sciences and SUM Hospital, Siksha O Anusandhan Deemed to be University, Bhubaneswar, Odisha 751003, India
| | - Chita Ranjan Sahoo
- Central Research Laboratory, Institute of Medical Sciences and SUM Hospital, Siksha O Anusandhan Deemed to be University, Bhubaneswar, Odisha 751003, India
| | - Rabindra Nath Padhy
- Central Research Laboratory, Institute of Medical Sciences and SUM Hospital, Siksha O Anusandhan Deemed to be University, Bhubaneswar, Odisha 751003, India.
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Al-Khayri JM, Asghar W, Khan S, Akhtar A, Ayub H, Khalid N, Alessa FM, Al-Mssallem MQ, Rezk AAS, Shehata WF. Therapeutic Potential of Marine Bioactive Peptides against Human Immunodeficiency Virus: Recent Evidence, Challenges, and Future Trends. Mar Drugs 2022; 20:md20080477. [PMID: 35892945 PMCID: PMC9394390 DOI: 10.3390/md20080477] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Revised: 07/21/2022] [Accepted: 07/23/2022] [Indexed: 02/04/2023] Open
Abstract
Acquired immunodeficiency syndrome (AIDS) is a chronic and potentially fatal ailment caused by the human immunodeficiency virus (HIV) and remains a major health problem worldwide. In recent years, the research focus has shifted to a greater emphasis on complementing treatment regimens involving conventional antiretroviral (ARV) drug therapies with novel lead structures isolated from various marine organisms that have the potential to be utilized as therapeutics for the management of HIV-AIDS. The present review summarizes the recent developments regarding bioactive peptides sourced from various marine organisms. This includes a discussion encompassing the potential of these novel marine bioactive peptides with regard to antiretroviral activities against HIV, preparation, purification, and processing techniques, in addition to insight into the future trends with an emphasis on the potential of exploration and evaluation of novel peptides to be developed into effective antiretroviral drugs.
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Affiliation(s)
- Jameel Mohammed Al-Khayri
- Department of Plant Biotechnology, College of Agriculture and Food Sciences, King Faisal University, Al-Ahsa 31982, Saudi Arabia; (A.A.-S.R.); (W.F.S.)
- Correspondence: (J.M.A.-K.); (N.K.)
| | - Waqas Asghar
- School of Food and Agricultural Sciences, University of Management and Technology, Lahore 54770, Pakistan; (W.A.); (S.K.); (A.A.); (H.A.)
| | - Sipper Khan
- School of Food and Agricultural Sciences, University of Management and Technology, Lahore 54770, Pakistan; (W.A.); (S.K.); (A.A.); (H.A.)
| | - Aqsa Akhtar
- School of Food and Agricultural Sciences, University of Management and Technology, Lahore 54770, Pakistan; (W.A.); (S.K.); (A.A.); (H.A.)
| | - Haris Ayub
- School of Food and Agricultural Sciences, University of Management and Technology, Lahore 54770, Pakistan; (W.A.); (S.K.); (A.A.); (H.A.)
| | - Nauman Khalid
- School of Food and Agricultural Sciences, University of Management and Technology, Lahore 54770, Pakistan; (W.A.); (S.K.); (A.A.); (H.A.)
- Correspondence: (J.M.A.-K.); (N.K.)
| | - Fatima Mohammed Alessa
- Department of Food Science and Nutrition, College of Agriculture and Food Sciences, King Faisal University, Al-Ahsa 31982, Saudi Arabia; (F.M.A.); (M.Q.A.-M.)
| | - Muneera Qassim Al-Mssallem
- Department of Food Science and Nutrition, College of Agriculture and Food Sciences, King Faisal University, Al-Ahsa 31982, Saudi Arabia; (F.M.A.); (M.Q.A.-M.)
| | - Adel Abdel-Sabour Rezk
- Department of Plant Biotechnology, College of Agriculture and Food Sciences, King Faisal University, Al-Ahsa 31982, Saudi Arabia; (A.A.-S.R.); (W.F.S.)
| | - Wael Fathi Shehata
- Department of Plant Biotechnology, College of Agriculture and Food Sciences, King Faisal University, Al-Ahsa 31982, Saudi Arabia; (A.A.-S.R.); (W.F.S.)
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9
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Zaky AA, Simal-Gandara J, Eun JB, Shim JH, Abd El-Aty AM. Bioactivities, Applications, Safety, and Health Benefits of Bioactive Peptides From Food and By-Products: A Review. Front Nutr 2022; 8:815640. [PMID: 35127796 PMCID: PMC8810531 DOI: 10.3389/fnut.2021.815640] [Citation(s) in RCA: 87] [Impact Index Per Article: 43.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Accepted: 12/30/2021] [Indexed: 12/12/2022] Open
Abstract
Bioactive peptides generated from food proteins have great potential as functional foods and nutraceuticals. Bioactive peptides possess several significant functions, such as antioxidative, anti-inflammatory, anticancer, antimicrobial, immunomodulatory, and antihypertensive effects in the living body. In recent years, numerous reports have been published describing bioactive peptides/hydrolysates produced from various food sources. Herein, we reviewed the bioactive peptides or protein hydrolysates found in the plant, animal, marine, and dairy products, as well as their by-products. This review also emphasizes the health benefits, bioactivities, and utilization of active peptides obtained from the mentioned sources. Their possible application in functional product development, feed, wound healing, pharmaceutical and cosmetic industries, and their use as food additives have all been investigated alongside considerations on their safety.
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Affiliation(s)
- Ahmed A. Zaky
- National Research Centre, Department of Food Technology, Food Industries and Nutrition Research Institute, Cairo, Egypt
| | - Jesus Simal-Gandara
- Nutrition and Bromatology Group, Department of Analytical Chemistry and Food Science, Faculty of Science, Universidade de Vigo, Ourense, Spain
| | - Jong-Bang Eun
- Department of Food Science and Technology, Chonnam National University, Gwangju, South Korea
| | - Jae-Han Shim
- Natural Products Chemistry Laboratory, Biotechnology Research Institute, Chonnam National University, Gwangju, South Korea
| | - A. M. Abd El-Aty
- Department of Pharmacology, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt
- Department of Medical Pharmacology, Medical Faculty, Ataturk University, Erzurum, Turkey
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Man-Specific Lectins from Plants, Fungi, Algae and Cyanobacteria, as Potential Blockers for SARS-CoV, MERS-CoV and SARS-CoV-2 (COVID-19) Coronaviruses: Biomedical Perspectives. Cells 2021; 10:cells10071619. [PMID: 34203435 PMCID: PMC8305077 DOI: 10.3390/cells10071619] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Revised: 06/06/2021] [Accepted: 06/25/2021] [Indexed: 12/18/2022] Open
Abstract
Betacoronaviruses, responsible for the “Severe Acute Respiratory Syndrome” (SARS) and the “Middle East Respiratory Syndrome” (MERS), use the spikes protruding from the virion envelope to attach and subsequently infect the host cells. The coronavirus spike (S) proteins contain receptor binding domains (RBD), allowing the specific recognition of either the dipeptidyl peptidase CD23 (MERS-CoV) or the angiotensin-converting enzyme ACE2 (SARS-Cov, SARS-CoV-2) host cell receptors. The heavily glycosylated S protein includes both complex and high-mannose type N-glycans that are well exposed at the surface of the spikes. A detailed analysis of the carbohydrate-binding specificity of mannose-binding lectins from plants, algae, fungi, and bacteria, revealed that, depending on their origin, they preferentially recognize either complex type N-glycans, or high-mannose type N-glycans. Since both complex and high-mannose glycans substantially decorate the S proteins, mannose-specific lectins are potentially useful glycan probes for targeting the SARS-CoV, MERS-CoV, and SARS-CoV-2 virions. Mannose-binding legume lectins, like pea lectin, and monocot mannose-binding lectins, like snowdrop lectin or the algal lectin griffithsin, which specifically recognize complex N-glycans and high-mannose glycans, respectively, are particularly adapted for targeting coronaviruses. The biomedical prospects of targeting coronaviruses with mannose-specific lectins are wide-ranging including detection, immobilization, prevention, and control of coronavirus infection.
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Barre A, Damme EJV, Simplicien M, Benoist H, Rougé P. Man-Specific, GalNAc/T/Tn-Specific and Neu5Ac-Specific Seaweed Lectins as Glycan Probes for the SARS-CoV-2 (COVID-19) Coronavirus. Mar Drugs 2020; 18:E543. [PMID: 33138151 PMCID: PMC7693892 DOI: 10.3390/md18110543] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2020] [Revised: 10/25/2020] [Accepted: 10/26/2020] [Indexed: 12/12/2022] Open
Abstract
Seaweed lectins, especially high-mannose-specific lectins from red algae, have been identified as potential antiviral agents that are capable of blocking the replication of various enveloped viruses like influenza virus, herpes virus, and HIV-1 in vitro. Their antiviral activity depends on the recognition of glycoprotein receptors on the surface of sensitive host cells-in particular, hemagglutinin for influenza virus or gp120 for HIV-1, which in turn triggers fusion events, allowing the entry of the viral genome into the cells and its subsequent replication. The diversity of glycans present on the S-glycoproteins forming the spikes covering the SARS-CoV-2 envelope, essentially complex type N-glycans and high-mannose type N-glycans, suggests that high-mannose-specific seaweed lectins are particularly well adapted as glycan probes for coronaviruses. This review presents a detailed study of the carbohydrate-binding specificity of high-mannose-specific seaweed lectins, demonstrating their potential to be used as specific glycan probes for coronaviruses, as well as the biomedical interest for both the detection and immobilization of SARS-CoV-2 to avoid shedding of the virus into the environment. The use of these seaweed lectins as replication blockers for SARS-CoV-2 is also discussed.
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Affiliation(s)
- Annick Barre
- Institut de Recherche et Développement, Faculté de Pharmacie, UMR 152 PharmaDev, Université Paul Sabatier, 35 Chemin des Maraîchers, 31062 Toulouse, France; (A.B.); (M.S.); (H.B.)
| | - Els J.M. Van Damme
- Department of Biotechnology, Faculty of Bioscience Engineering, Ghent University, Coupure links 653, B-9000 Ghent, Belgium;
| | - Mathias Simplicien
- Institut de Recherche et Développement, Faculté de Pharmacie, UMR 152 PharmaDev, Université Paul Sabatier, 35 Chemin des Maraîchers, 31062 Toulouse, France; (A.B.); (M.S.); (H.B.)
| | - Hervé Benoist
- Institut de Recherche et Développement, Faculté de Pharmacie, UMR 152 PharmaDev, Université Paul Sabatier, 35 Chemin des Maraîchers, 31062 Toulouse, France; (A.B.); (M.S.); (H.B.)
| | - Pierre Rougé
- Institut de Recherche et Développement, Faculté de Pharmacie, UMR 152 PharmaDev, Université Paul Sabatier, 35 Chemin des Maraîchers, 31062 Toulouse, France; (A.B.); (M.S.); (H.B.)
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12
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Hung LD, Trinh PTH. Structure and anticancer activity of a new lectin from the cultivated red alga, Kappaphycus striatus. J Nat Med 2020; 75:223-231. [PMID: 33025357 PMCID: PMC7538373 DOI: 10.1007/s11418-020-01455-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Accepted: 09/27/2020] [Indexed: 01/16/2023]
Abstract
The red alga Kappaphycus striatus is economically important food species and extensively cultivated throughout most tropical parts of the world as a source of carrageenan. In this note, the primary structure of a new lectin KSL from this alga was elucidated by the rapid amplification method of complementary DNA (cDNA) ends, which consists of 267 amino acid residues distributed in four tandem-repeated domains of about 67 amino acids and sharing 43% of identity. The calculated molecular mass from the deduced sequence was consistent with that of natural KSL (27,826 Da) determined by electron spray ionization-mass spectrometry. The primary structure of KSL showed high similarity to those of the high mannose N-glycan specific lectins from marine red algae, ESA-2 from Eucheuma serra, EDA-2 from Eucheuma denticulatum, KSA-2 from Kappaphycus striatum, KAAs from Kappaphycus alvarezii and SfLs from Solieria filiformis, and from microorganisms, BOA from Burkholderia oklahomensis, MBHA from Myxococcus xanthus, OAA from Oscillatoria agardhii and PFL from Pseudomonas fluorescens. Furthermore, KSL showed anticancer effects against five carcinoma cell lines, HT29, Hela, MCF-7, SK-LU-1 and AGS, in a dose-dependent manner with the IC50 values of 0.80-1.94 µM, whereas its inhibition activities on cancer cells were not detected in the presence of yeast mannan, an inhibitor against lectin KSL. The cultivated red alga K. striatus could also be a good source of functional lectin(s) for application as anticancer agents.
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Affiliation(s)
- Le Dinh Hung
- NhaTrang Institute of Technology Research and Application, Vietnam Academy of Science and Technology, 2A, Hungvuong Street, Nhatrang City, Khanhhoa Province, Vietnam.
| | - Phan Thi Hoai Trinh
- NhaTrang Institute of Technology Research and Application, Vietnam Academy of Science and Technology, 2A, Hungvuong Street, Nhatrang City, Khanhhoa Province, Vietnam
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13
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The OAAH Family: Anti-Influenza Virus Lectins. Methods Mol Biol 2020. [PMID: 32306367 DOI: 10.1007/978-1-0716-0430-4_59] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
Abstract
High mannose (HM)-binding Oscillatoria agardhii agglutinin homologue (OAAH) lectin family is an important class of anti-viral proteins. The OAAH family lectins show potent anti-influenza virus activity with EC50 of nanomolar levels by binding to HM glycans of the envelope glycoprotein hemagglutinin (HA), thereby inhibiting the viral entry into host cells. No broadly effective neutralizing vaccines for influenza virus are available due to the frequent antigenic drift caused by rapid mutations. Alternatives for vaccines need to be developed to prepare for a possible risk of future emergence of a highly virulent virus. Possible use of antiviral lectins is a simple and useful strategy to prevent viral infection by interfering with the interaction between viral HA and the host sialic acid-containing receptor. High-density glycans of surface HA are primary targets for the lectins to inhibit viral entry. In general, the anti-influenza virus potency of lectins is evaluated by a series of inhibitory assays for infection, such as neutral red dye uptake assay to determine the extent of viral cytopathic effect, and immunofluorescence microscopy to detect the expression of viral proteins in infected cells. Direct interaction between lectins and HA could be evaluated by enzyme-linked immunosorbent assay or surface plasmon resonance analysis.
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Antitumor Potential of Marine and Freshwater Lectins. Mar Drugs 2019; 18:md18010011. [PMID: 31877692 PMCID: PMC7024344 DOI: 10.3390/md18010011] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2019] [Revised: 12/18/2019] [Accepted: 12/18/2019] [Indexed: 12/12/2022] Open
Abstract
Often, even the most effective antineoplastic drugs currently used in clinic do not efficiently allow complete healing due to the related toxicity. The reason for the toxicity lies in the lack of selectivity for cancer cells of the vast majority of anticancer agents. Thus, the need for new potent anticancer compounds characterized by a better toxicological profile is compelling. Lectins belong to a particular class of non-immunogenic glycoproteins and have the characteristics to selectively bind specific sugar sequences on the surface of cells. This property is exploited to exclusively bind cancer cells and exert antitumor activity through the induction of different forms of regulated cell death and the inhibition of cancer cell proliferation. Thanks to the extraordinary biodiversity, marine environments represent a unique source of active natural compounds with anticancer potential. Several marine and freshwater organisms, ranging from the simplest alga to the most complex vertebrate, are amazingly enriched in these proteins. Remarkably, all studies gathered in this review show the impressive anticancer effect of each studied marine lectin combined with irrelevant toxicity in vitro and in vivo and pave the way to design clinical trials to assess the real antineoplastic potential of these promising proteins. It provides a concise and precise description of the experimental results, their interpretation as well as the experimental conclusions that can be drawn.
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Barre A, Simplicien M, Benoist H, Van Damme EJM, Rougé P. Mannose-Specific Lectins from Marine Algae: Diverse Structural Scaffolds Associated to Common Virucidal and Anti-Cancer Properties. Mar Drugs 2019; 17:E440. [PMID: 31357490 PMCID: PMC6723950 DOI: 10.3390/md17080440] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2019] [Revised: 07/23/2019] [Accepted: 07/24/2019] [Indexed: 02/06/2023] Open
Abstract
To date, a number of mannose-specific lectins have been isolated and characterized from seaweeds, especially from red algae. In fact, man-specific seaweed lectins consist of different structural scaffolds harboring a single or a few carbohydrate-binding sites which specifically recognize mannose-containing glycans. Depending on the structural scaffold, man-specific seaweed lectins belong to five distinct structurally-related lectin families, namely (1) the griffithsin lectin family (β-prism I scaffold); (2) the Oscillatoria agardhii agglutinin homolog (OAAH) lectin family (β-barrel scaffold); (3) the legume lectin-like lectin family (β-sandwich scaffold); (4) the Galanthus nivalis agglutinin (GNA)-like lectin family (β-prism II scaffold); and, (5) the MFP2-like lectin family (MFP2-like scaffold). Another algal lectin from Ulva pertusa, has been inferred to the methanol dehydrogenase related lectin family, because it displays a rather different GlcNAc-specificity. In spite of these structural discrepancies, all members from the five lectin families share a common ability to specifically recognize man-containing glycans and, especially, high-mannose type glycans. Because of their mannose-binding specificity, these lectins have been used as valuable tools for deciphering and characterizing the complex mannose-containing glycans from the glycocalyx covering both normal and transformed cells, and as diagnostic tools and therapeutic drugs that specifically recognize the altered high-mannose N-glycans occurring at the surface of various cancer cells. In addition to these anti-cancer properties, man-specific seaweed lectins have been widely used as potent human immunodeficiency virus (HIV-1)-inactivating proteins, due to their capacity to specifically interact with the envelope glycoprotein gp120 and prevent the virion infectivity of HIV-1 towards the host CD4+ T-lymphocyte cells in vitro.
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Affiliation(s)
- Annick Barre
- Institut de Recherche et Développement, Faculté de Pharmacie, UMR 152 PharmaDev, Université Paul Sabatier, 35 Chemin des Maraîchers, 31062 Toulouse, France
| | - Mathias Simplicien
- Institut de Recherche et Développement, Faculté de Pharmacie, UMR 152 PharmaDev, Université Paul Sabatier, 35 Chemin des Maraîchers, 31062 Toulouse, France
| | - Hervé Benoist
- Institut de Recherche et Développement, Faculté de Pharmacie, UMR 152 PharmaDev, Université Paul Sabatier, 35 Chemin des Maraîchers, 31062 Toulouse, France
| | - Els J M Van Damme
- Department of Biotechnology, Faculty of Bioscience Engineering, Ghent University, Coupure links 653, B-9000 Ghent, Belgium
| | - Pierre Rougé
- Institut de Recherche et Développement, Faculté de Pharmacie, UMR 152 PharmaDev, Université Paul Sabatier, 35 Chemin des Maraîchers, 31062 Toulouse, France.
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Bhandari D, Rafiq S, Gat Y, Gat P, Waghmare R, Kumar V. A Review on Bioactive Peptides: Physiological Functions, Bioavailability and Safety. Int J Pept Res Ther 2019. [DOI: 10.1007/s10989-019-09823-5] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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17
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Hwang HJ, Han JW, Jeon H, Han JW. Induction of Recombinant Lectin Expression by an Artificially Constructed Tandem Repeat Structure: A Case Study Using Bryopsis plumosa Mannose-Binding Lectin. Biomolecules 2018; 8:E146. [PMID: 30441842 PMCID: PMC6316659 DOI: 10.3390/biom8040146] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Revised: 11/12/2018] [Accepted: 11/12/2018] [Indexed: 11/16/2022] Open
Abstract
Lectin is an important protein in medical and pharmacological applications. Impurities in lectin derived from natural sources and the generation of inactive proteins by recombinant technology are major obstacles for the use of lectins. Expressing recombinant lectin with a tandem repeat structure can potentially overcome these problems, but few studies have systematically examined this possibility. This was investigated in the present study using three distinct forms of recombinant mannose-binding lectin from Bryopsis plumosa (BPL2)-i.e., the monomer (rD1BPL2), as well as the dimer (rD2BPL2), and tetramer (rD4BPL2) arranged as tandem repeats. The concentration of the inducer molecule isopropyl β-D-1-thiogalactopyranoside and the induction time had no effect on the efficiency of the expression of each construct. Of the tested constructs, only rD4BPL2 showed hemagglutination activity towards horse erythrocytes; the activity of towards the former was 64 times higher than that of native BPL2. Recombinant and native BPL2 showed differences in carbohydrate specificity; the activity of rD4BPL2 was inhibited by the glycoprotein fetuin, whereas that of native BPL2 was also inhibited by d-mannose. Our results indicate that expression as tandem repeat sequences can increase the efficiency of lectin production on a large scale using a bacterial expression system.
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Affiliation(s)
- Hyun-Ju Hwang
- Department of Genetic Resources, National Marine Biodiversity Institute of Korea, Seocheon 33662, Korea.
| | - Jin-Woo Han
- Department of Genetic Resources, National Marine Biodiversity Institute of Korea, Seocheon 33662, Korea.
| | - Hancheol Jeon
- Department of Genetic Resources, National Marine Biodiversity Institute of Korea, Seocheon 33662, Korea.
| | - Jong Won Han
- Department of Genetic Resources, National Marine Biodiversity Institute of Korea, Seocheon 33662, Korea.
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18
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Singh RS, Walia AK. Lectins from red algae and their biomedical potential. JOURNAL OF APPLIED PHYCOLOGY 2017; 30:1833-1858. [PMID: 32214665 PMCID: PMC7088393 DOI: 10.1007/s10811-017-1338-5] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2017] [Revised: 11/06/2017] [Accepted: 11/06/2017] [Indexed: 05/08/2023]
Abstract
Lectins are unique proteins or glycoproteins of non-immune origin that bind specifically to carbohydrates. They recognise and interact reversibly to either free carbohydrates or glycoconjugates, without modifying their structure. Lectins are highly diverse and widely distributed in nature and have been extensively reported from various red algae species. Numerous red algae species have been reported to possess lectins having carbohydrate specificity towards complex glycoproteins or high-mannose N-glycans. These lectin-glycan interactions further trigger many biochemical responses which lead to their extensive use as valuable tools in biomedical research. Thus, owing to their exceptional glycan recognition property, red algae lectins are potential candidate for inhibition of various viral diseases. Hence, the present report integrates existing information on the red algae lectins, their carbohydrate specificity, and characteristics of purified lectins. Further, the review also reports the current state of research into their anti-viral activity against various enveloped viruses such as HIV, hepatitis, influenza, encephalitis, coronavirus and herpes simplex virus and other biomedical activities such as anti-cancer, anti-microbial, anti-inflammatory, anti-nociceptive and acaricidal activities.
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Affiliation(s)
- Ram Sarup Singh
- Carbohydrate and Protein Biotechnology Laboratory, Department of Biotechnology, Punjabi University, Patiala, Punjab 147 002 India
| | - Amandeep Kaur Walia
- Carbohydrate and Protein Biotechnology Laboratory, Department of Biotechnology, Punjabi University, Patiala, Punjab 147 002 India
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19
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Chaves RP, Silva SRD, Nascimento Neto LG, Carneiro RF, Silva ALCD, Sampaio AH, Sousa BLD, Cabral MG, Videira PA, Teixeira EH, Nagano CS. Structural characterization of two isolectins from the marine red alga Solieria filiformis (Kützing) P.W. Gabrielson and their anticancer effect on MCF-7 breast cancer cells. Int J Biol Macromol 2017; 107:1320-1329. [PMID: 28970169 DOI: 10.1016/j.ijbiomac.2017.09.116] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Accepted: 09/28/2017] [Indexed: 12/19/2022]
Abstract
As described in the literature, Solieria filiformis lectin (SfL) from the marine red alga S. filiformis was found to have antinociceptive and anti-inflammatory effects. In this study, we characterized two SfL variants, SfL-1 and SfL-2, with molecular mass of 27,552Da and 27,985Da, respectively. The primary structures of SfL-1 and SfL-2 consist of four tandem-repeat protein domains with 67 amino acids each. SfL-1 and -2 showed high similarity to OAAH-family lectins. 3D structure prediction revealed that SfL-1 and -2 are composed of two β-barrel-like domains formed by five antiparallel β-strands, which are connected by a short peptide linker. Furthermore, the mixture of isoforms (SfLs) showed anticancer effect against MCF-7 cells. Specifically, SfLs inhibited 50% of viability in MCF-7 cells after treatment at 125μg.mL-1, while the inhibition of Human Dermal Fibroblasts (HDF) was 34% with the same treatment. Finally, 24h after treatment, 25% of MCF-7 cells were in early apoptosis and 35% in late apoptosis. Evaluation of pro- and anti-apoptotic gene expression of MCF-7 cells revealed that SfLs induced caspase-dependent apoptosis within 24h.
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Affiliation(s)
- Renata Pinheiro Chaves
- Laboratório de Biotecnologia Marinha - BioMar-Lab, Departamento de Engenharia de Pesca, Universidade Federal do Ceará, Campus do Pici s/n, bloco 871, 60440-900 Fortaleza, Ceará, Brazil
| | - Suzete Roberta da Silva
- Laboratório de Biotecnologia Marinha - BioMar-Lab, Departamento de Engenharia de Pesca, Universidade Federal do Ceará, Campus do Pici s/n, bloco 871, 60440-900 Fortaleza, Ceará, Brazil
| | - Luiz Gonzaga Nascimento Neto
- Laboratório de Biotecnologia Marinha - BioMar-Lab, Departamento de Engenharia de Pesca, Universidade Federal do Ceará, Campus do Pici s/n, bloco 871, 60440-900 Fortaleza, Ceará, Brazil; Laboratório Integrado de Biomoléculas - LIBS, Departamento de Patologia e Medicina Legal, Universidade Federal do Ceará, Monsenhor Furtado, s/n, 60430-160 Fortaleza, Ceará, Brazil
| | - Romulo Farias Carneiro
- Laboratório de Biotecnologia Marinha - BioMar-Lab, Departamento de Engenharia de Pesca, Universidade Federal do Ceará, Campus do Pici s/n, bloco 871, 60440-900 Fortaleza, Ceará, Brazil
| | - André Luis Coelho da Silva
- Laboratório de Biotecnologia Molecular - LabBMol, Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Ceará, Campus do Pici, bloco 907, 60440-900, Fortaleza, Ceará, Brazil
| | - Alexandre Holanda Sampaio
- Laboratório de Biotecnologia Marinha - BioMar-Lab, Departamento de Engenharia de Pesca, Universidade Federal do Ceará, Campus do Pici s/n, bloco 871, 60440-900 Fortaleza, Ceará, Brazil
| | - Bruno Lopes de Sousa
- Faculdade de Filosofia Dom Aureliano Matos, Universidade Estadual do Ceará, Av. Dom Aureliano Matos, 2060, Limoeiro do Norte, CE, 62930-000, Brazil
| | | | - Paula Alexandra Videira
- UCIBIO, Departamento de Ciências da Vida, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa, 2829-516, Caparica, Portugal
| | - Edson Holanda Teixeira
- Laboratório Integrado de Biomoléculas - LIBS, Departamento de Patologia e Medicina Legal, Universidade Federal do Ceará, Monsenhor Furtado, s/n, 60430-160 Fortaleza, Ceará, Brazil
| | - Celso Shiniti Nagano
- Laboratório de Biotecnologia Marinha - BioMar-Lab, Departamento de Engenharia de Pesca, Universidade Federal do Ceará, Campus do Pici s/n, bloco 871, 60440-900 Fortaleza, Ceará, Brazil.
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A Novel High-Mannose Specific Lectin from the Green Alga Halimeda renschii Exhibits a Potent Anti-Influenza Virus Activity through High-Affinity Binding to the Viral Hemagglutinin. Mar Drugs 2017; 15:md15080255. [PMID: 28813016 PMCID: PMC5577609 DOI: 10.3390/md15080255] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2017] [Revised: 08/08/2017] [Accepted: 08/08/2017] [Indexed: 01/17/2023] Open
Abstract
We have isolated a novel lectin, named HRL40 from the green alga Halimeda renschii. In hemagglutination-inhibition test and oligosaccharide-binding experiment with 29 pyridylaminated oligosaccharides, HRL40 exhibited a strict binding specificity for high-mannose N-glycans having an exposed (α1-3) mannose residue in the D2 arm of branched mannosides, and did not have an affinity for monosaccharides and other oligosaccharides examined, including complex N-glycans, an N-glycan core pentasaccharide, and oligosaccharides from glycolipids. The carbohydrate binding profile of HRL40 resembled those of Type I high-mannose specific antiviral algal lectins, or the Oscillatoria agardhii agglutinin (OAA) family, which were previously isolated from red algae and a blue-green alga (cyanobacterium). HRL40 potently inhibited the infection of influenza virus (A/H3N2/Udorn/72) into NCI-H292 cells with half-maximal effective dose (ED50) of 2.45 nM through high-affinity binding to a viral envelope hemagglutinin (KD, 3.69 × 10−11 M). HRL40 consisted of two isolectins (HRL40-1 and HRL40-2), which could be separated by reverse-phase HPLC. Both isolectins had the same molecular weight of 46,564 Da and were a disulfide -linked tetrameric protein of a 11,641 Da polypeptide containing at least 13 half-cystines. Thus, HRL40, which is the first Type I high-mannose specific antiviral lectin from the green alga, had the same carbohydrate binding specificity as the OAA family, but a molecular structure distinct from the family.
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Isolation, Amino Acid Sequences, and Plausible Functions of the Galacturonic Acid-Binding Egg Lectin of the Sea Hare Aplysia kurodai. Mar Drugs 2017; 15:md15060161. [PMID: 28574432 PMCID: PMC5484111 DOI: 10.3390/md15060161] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2017] [Revised: 05/12/2017] [Accepted: 05/25/2017] [Indexed: 11/25/2022] Open
Abstract
Egg lectins occur in a variety of animals ranging from mollusks to vertebrates. A few examples of molluscan egg lectins have been reported, including that of the sea hare Aplysia kurodai; however, their biological functions in the egg remain unclarified. We report the isolation, determination of primary structure, and possible functions of A.kurodai lectin (AKL) from the egg mass of A. kurodai. We obtained AKL as an inseparable mixture of isoproteins with a relative molecular mass of approximately 32 kDa by affinity purification. The hemagglutinating activity of AKL against rabbit erythrocytes was inhibited most potently by galacturonic acid and moderately by xylose. Nucleotide sequencing of corresponding cDNA obtained by rapid amplification of cDNA ends (RACE) allowed us to deduce complete amino acid sequences. The mature polypeptides consisted of 218- or 219-amino acids with three repeated domains. The amino acid sequence had similarities to hypothetical proteins of Aplysia spp., or domain DUF3011 of uncharacterized bacterial proteins. AKL is the first member of the DUF3011 family whose function, carbohydrate recognition, was revealed. Treatment of the egg with galacturonic acid, an AKL sugar inhibitor, resulted in deformation of the veliger larvae, suggesting that AKL is involved in organogenesis in the developmental stage of A. kurodai.
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Hirayama M, Shibata H, Imamura K, Sakaguchi T, Hori K. High-Mannose Specific Lectin and Its Recombinants from a Carrageenophyta Kappaphycus alvarezii Represent a Potent Anti-HIV Activity Through High-Affinity Binding to the Viral Envelope Glycoprotein gp120. MARINE BIOTECHNOLOGY (NEW YORK, N.Y.) 2016; 18:215-31. [PMID: 26661793 PMCID: PMC7088246 DOI: 10.1007/s10126-015-9684-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/02/2015] [Accepted: 11/10/2015] [Indexed: 06/05/2023]
Abstract
We previously reported that a high-mannose binding lectin KAA-2 from the red alga Kappaphycus alvarezii, which is an economically important species and widely cultivated as a source of carrageenans, had a potent anti-influenza virus activity. In this study, the full-length sequences of two KAA isoforms, KAA-1 and KAA-2, were elucidated by a combination of peptide mapping and cDNA cloning. They consisted of four internal tandem-repeated domains, which are conserved in high-mannose specific lectins from lower organisms, including a cyanobacterium Oscillatoria agardhii and a red alga Eucheuma serra. Using an Escherichia coli expression system, an active recombinant form of KAA-1 (His-tagged rKAA-1) was successfully generated in the yield of 115 mg per a litter of culture. In a detailed oligosaccharide binding analysis by a centrifugal ultrafiltration-HPLC method with 27 pyridylaminated oligosaccharides, His-tagged rKAA-1 and rKAA-1 specifically bound to high-mannose N-glycans with an exposed α1-3 mannose in the D2 arm as the native lectin did. Predicted from oligosaccharide-binding specificity, a surface plasmon resonance analysis revealed that the recombinants exhibit strong interaction with gp120, a heavily glycosylated envelope glycoprotein of HIV with high association constants (1.48-1.61 × 10(9) M(-1)). Native KAAs and the recombinants inhibited the HIV-1 entry at IC50s of low nanomolar levels (7.3-12.9 nM). Thus, the recombinant proteins would be useful as antiviral reagents targeting the viral surface glycoproteins with high-mannose N-glycans, and the cultivated alga K. alvarezii could also be a good source of not only carrageenans but also this functional lectin(s).
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Affiliation(s)
- Makoto Hirayama
- Graduate School of Biosphere Science, Hiroshima University, 1-4-4 Kagamiyama, Higashi-Hiroshima, 739-8528, Japan
| | - Hiromi Shibata
- Graduate School of Biosphere Science, Hiroshima University, 1-4-4 Kagamiyama, Higashi-Hiroshima, 739-8528, Japan
| | - Koji Imamura
- Medical and Biological Laboratories Co., Ltd., 1063-103 Terasawaoka, Ina, Nagano, 396-0002, Japan
| | - Takemasa Sakaguchi
- Department of Virology, Institute of Biomedical and Health Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima, 734-8551, Japan
| | - Kanji Hori
- Graduate School of Biosphere Science, Hiroshima University, 1-4-4 Kagamiyama, Higashi-Hiroshima, 739-8528, Japan.
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Sato Y, Kubo T, Morimoto K, Yanagihara K, Seyama T. High mannose-binding Pseudomonas fluorescens lectin (PFL) downregulates cell surface integrin/EGFR and induces autophagy in gastric cancer cells. BMC Cancer 2016; 16:63. [PMID: 26850110 PMCID: PMC4744433 DOI: 10.1186/s12885-016-2099-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2014] [Accepted: 01/28/2016] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Pseudomonas fluorescens lectin (PFL) belongs to a recently discovered anti-HIV lectin family and induces anoikis-like cell death of MKN28 gastric cancer cells by causing α2 integrin internalization through recognition of high mannose glycans; however, the detailed anti-cancer mechanism is not fully elucidated. METHODS Cell adherence potency of MKN28 upon PFL treatment was assessed using a colorimetric assay. Cell surface molecules to which PFL bound were identified by peptide mass finger printing with Matrix Assisted Laser Desorption/Ionization-time of flight mass spectrometry and their cellular localization determined by immunofluorescence microscopy. Gene and protein expression in PFL-treated MKN28 cells were evaluated by microarray analysis and western blot, and the function of these genes was evaluated by siRNA knock-down. A proliferation assay measured the sensitivity of PFL-treated cancer cells to anti-cancer drugs. The effect of PFL on subcutaneous MKN28 tumor growth and hepatic tumor formation in BALB/c nude mice was evaluated. RESULTS The strength of MKN28 cell adherence in vitro to the extracellular matrix was impaired by PFL treatment, consistent with the observation that PFL induces rapid downregulation of surface integrins. PFL also was found to bind to cell surface epidermal growth factor receptor (EGFR). Surface EGFR molecules were endocytosed following PFL binding, and were degraded in a time-dependent fashion. This degradation process was largely the result of autophagy, as revealed by the increased expression of autophagic proteins. PFL-induced EGFR degradation was partly inhibited by RAB7 siRNA as well as LC3 siRNA, and internalized EGFR colocalized with ATG9 at 48 h post-PFL treatment, suggesting that these proteins contribute to dynamic degradation induced by PFL. PFL-induced decrease in surface EGFR rendered MKN28 cells susceptible to gefitinib, a selective inhibitor of EGFR tyrosine kinase. In vivo experiments showed that PFL-treated MKN28-EGFP cells injected in the portal vein of BALB/c nude mice failed to form tumor colonies on the liver, and intratumoral injection of PFL significantly inhibited tumor growth. CONCLUSION PFL-mediated downregulation of integrin and EGFR contributes to the inhibition of tumor growth in vitro and in vivo. This novel anti-cancer mechanism of PFL suggests that this lectin would be useful as an anti-cancer drug or an adjuvant for other drugs.
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Affiliation(s)
- Yuichiro Sato
- Department of Medical Pharmacy, Faculty of Pharmacy, Yasuda Women's University, Hiroshima, Japan.
| | - Takanori Kubo
- Department of Life Sciences, Faculty of Pharmacy, Yasuda Women's University, Hiroshima, Japan
| | - Kinjiro Morimoto
- Department of Medical Pharmacy, Faculty of Pharmacy, Yasuda Women's University, Hiroshima, Japan
| | - Kazuyoshi Yanagihara
- Department of Life Sciences, Faculty of Pharmacy, Yasuda Women's University, Hiroshima, Japan.,Present address; Division of Translational Research, National Cancer Center Research Institute, 6-5-1 Kashiwanoha, Kashiwa, Chiba, Japan
| | - Toshio Seyama
- Department of Life Sciences, Faculty of Pharmacy, Yasuda Women's University, Hiroshima, Japan
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Hirayama M, Shibata H, Imamura K, Sakaguchi T, Hori K. High-Mannose Specific Lectin and Its Recombinants from a Carrageenophyta Kappaphycus alvarezii Represent a Potent Anti-HIV Activity Through High-Affinity Binding to the Viral Envelope Glycoprotein gp120. MARINE BIOTECHNOLOGY (NEW YORK, N.Y.) 2016; 18:144-60. [PMID: 26593063 PMCID: PMC7088233 DOI: 10.1007/s10126-015-9677-1] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2015] [Accepted: 10/22/2015] [Indexed: 05/24/2023]
Abstract
We previously reported that a high-mannose binding lectin KAA-2 from the red alga Kappaphycus alvarezii, which is an economically important species and widely cultivated as a source of carrageenans, had a potent anti-influenza virus activity. In this study, the full-length sequences of two KAA isoforms, KAA-1 and KAA-2, were elucidated by a combination of peptide mapping and complementary DNA (cDNA) cloning. They consisted of four internal tandem-repeated domains, which are conserved in high-mannose specific lectins from lower organisms, including a cyanobacterium Oscillatoria agardhii and a red alga Eucheuma serra. Using an Escherichia coli expression system, an active recombinant form of KAA-1 (His-tagged rKAA-1) was successfully generated in the yield of 115 mg per liter of culture. In a detailed oligosaccharide binding analysis by a centrifugal ultrafiltration-HPLC method with 27 pyridylaminated oligosaccharides, His-tagged rKAA-1 and rKAA-1 specifically bound to high-mannose N-glycans with an exposed α1-3 mannose in the D2 arm as the native lectin did. Predicted from oligosaccharide binding specificity, a surface plasmon resonance analysis revealed that the recombinants exhibit strong interaction with gp120, a heavily glycosylated envelope glycoprotein of HIV with high association constants (1.48 - 1.61 × 10(9) M(-1)). Native KAAs and the recombinants inhibited the HIV-1 entry at IC50s of low nanomolar levels (7.3-12.9 nM). Thus, the recombinant proteins would be useful as antiviral reagents targeting the viral surface glycoproteins with high-mannose N-glycans, and the cultivated alga K. alvarezii could also be a good source of not only carrageenans but also this functional lectin(s).
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Affiliation(s)
- Makoto Hirayama
- Graduate School of Biosphere Science, Hiroshima University, 1-4-4 Kagamiyama, Higashi-Hiroshima, 739-8528, Japan
| | - Hiromi Shibata
- Graduate School of Biosphere Science, Hiroshima University, 1-4-4 Kagamiyama, Higashi-Hiroshima, 739-8528, Japan
| | - Koji Imamura
- Medical & Biological Laboratories Co., Ltd., 1063-103 Terasawaoka, Ina, Nagano, 396-0002, Japan
| | - Takemasa Sakaguchi
- Department of Virology, Institute of Biomedical & Health Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima, 734-8551, Japan
| | - Kanji Hori
- Graduate School of Biosphere Science, Hiroshima University, 1-4-4 Kagamiyama, Higashi-Hiroshima, 739-8528, Japan.
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Jo C, Khan FF, Khan MI, Iqbal J. Marine bioactive peptides: Types, structures, and physiological functions. FOOD REVIEWS INTERNATIONAL 2016. [DOI: 10.1080/87559129.2015.1137311] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Sato Y. [Structure and Function of a Novel Class of High Mannose-binding Proteins with Anti-viral or Anti-tumor Activity]. YAKUGAKU ZASSHI 2015; 135:1281-9. [PMID: 26521877 DOI: 10.1248/yakushi.15-00217] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The recently discovered high mannose (HM)-binding lectin family in lower organisms such as bacteria, cyanobacteria, and marine algae represents a novel class of anti-viral or anti-tumor compounds. This lectin family shows unique carbohydrate binding properties with exclusive high specificity for HM glycans with core trisaccharide comprising Manα(1-3)Manα(1-6)Man at the D2 arm. At low nanomolar levels, these lectins exhibit potent antiviral activity against HIV and influenza viruses through the recognition of HM glycans on virus spike glycoproteins. In addition, some of these lectins, such as bacterial PFL, show cytotoxicity for various cancer cells at low micromolar levels. Cell surface molecules to which PFL bound were identified as integrin alpha 2 and epidermal growth factor receptor (EGFR) by peptide mass finger printing with MALDI-TOF MS. Upon PFL binding, these molecules were rapidly internalized to cytoplasm. EGFR was time dependently degraded in the presence of PFL, and this process was largely responsible for autophagy. Furthermore, PFL sensitizes cancer cells to the EGFR kinase inhibitor, gefitinib. In vivo experiments showed that intratumoral injection of PFL significantly inhibited the growth of tumors in nude mice. PFL-mediated down regulation of integrin/EGFR ultimately contributed to the inhibition of tumor growth both in vitro and in vivo. Thus, the novel anti-cancer mechanism of PFL suggests that this lectin is potentially useful as an anti-cancer drug or as an adjuvant for other drugs. This class of proteins will likely have beneficial impact as a tool for biochemical and biomedical research because of its unique carbohydrate specificity and various biological activities.
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Affiliation(s)
- Yuichiro Sato
- Department of Medical Pharmacy, Faculty of Pharmacy, Yasuda Women's University
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27
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Garcia-Vaquero M, Hayes M. Red and green macroalgae for fish and animal feed and human functional food development. FOOD REVIEWS INTERNATIONAL 2015. [DOI: 10.1080/87559129.2015.1041184] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Sato Y, Morimoto K, Kubo T, Sakaguchi T, Nishizono A, Hirayama M, Hori K. Entry Inhibition of Influenza Viruses with High Mannose Binding Lectin ESA-2 from the Red Alga Eucheuma serra through the Recognition of Viral Hemagglutinin. Mar Drugs 2015; 13:3454-65. [PMID: 26035023 PMCID: PMC4483639 DOI: 10.3390/md13063454] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2015] [Revised: 05/07/2015] [Accepted: 05/22/2015] [Indexed: 11/16/2022] Open
Abstract
Lectin sensitivity of the recent pandemic influenza A virus (H1N1-2009) was screened for 12 lectins with various carbohydrate specificity by a neutral red dye uptake assay with MDCK cells. Among them, a high mannose (HM)-binding anti-HIV lectin, ESA-2 from the red alga Eucheuma serra, showed the highest inhibition against infection with an EC50 of 12.4 nM. Moreover, ESA-2 exhibited a wide range of antiviral spectrum against various influenza strains with EC50s of pico molar to low nanomolar levels. Besides ESA-2, HM-binding plant lectin ConA, fucose-binding lectins such as fungal AOL from Aspergillus oryzae and AAL from Aleuria aurantia were active against H1N1-2009, but the potency of inhibition was of less magnitude compared with ESA-2. Direct interaction between ESA-2 and a viral envelope glycoprotein, hemagglutinin (HA), was demonstrated by ELISA assay. This interaction was effectively suppressed by glycoproteins bearing HM-glycans, indicating that ESA-2 binds to the HA of influenza virus through HM-glycans. Upon treatment with ESA-2, no viral antigens were detected in the host cells, indicating that ESA-2 inhibited the initial steps of virus entry into the cells. ESA-2 would thus be useful as a novel microbicide to prevent penetration of viruses such as HIV and influenza viruses to the host cells.
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Affiliation(s)
- Yuichiro Sato
- Faculty of Pharmacy, Yasuda Women's University, 6-13-1 Yasuhigashi, Asaminami-Ku, Hiroshima 731-0153, Japan.
| | - Kinjiro Morimoto
- Faculty of Pharmacy, Yasuda Women's University, 6-13-1 Yasuhigashi, Asaminami-Ku, Hiroshima 731-0153, Japan.
| | - Takanori Kubo
- Faculty of Pharmacy, Yasuda Women's University, 6-13-1 Yasuhigashi, Asaminami-Ku, Hiroshima 731-0153, Japan.
| | - Takemasa Sakaguchi
- Department of Virology, Institute of Biomedical & Health Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-Ku, Hiroshima 734-8551, Japan.
| | - Akira Nishizono
- Department of Microbiology, Faculty of Medicine, Oita University, 1-1 Idaigaoka, Hasama-machi, Yufu, Oita 879-5593, Japan.
| | - Makoto Hirayama
- Graduate School of Biosphere Science, Hiroshima University, 1-4-4 Kagamiyama, Higashi-Hiroshima 739-8528, Japan.
| | - Kanji Hori
- Graduate School of Biosphere Science, Hiroshima University, 1-4-4 Kagamiyama, Higashi-Hiroshima 739-8528, Japan.
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Hung LD, Hirayama M, Ly BM, Hori K. Purification, primary structure, and biological activity of the high-mannose N-glycan-specific lectin from cultivated Eucheuma denticulatum. JOURNAL OF APPLIED PHYCOLOGY 2015; 27:1657-1669. [PMID: 32214663 PMCID: PMC7088313 DOI: 10.1007/s10811-014-0441-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2014] [Revised: 10/19/2014] [Accepted: 10/19/2014] [Indexed: 05/13/2023]
Abstract
Three isolectins from cultivated Eucheuma denticulatum were isolated. They were commonly monomeric proteins of about 28 kDa with a range of averaged molecular weights from 27,834 to 27,868 Da among the isolectins and shared almost the same 20 N-terminal amino acid sequences. Complementary DNA (cDNA) cloning based on the rapid amplification cDNA ends (RACE) methods elucidated the full-length sequence of EDA-2 which encodes 269 amino acids, including initiating methionine, with four tandemly repeated domains of about 67 amino acids. The primary structure of EDA-2 is highly similar to those of the high-mannose N-glycan specific lectins including Oscillatoria agardhii (OAA) and Burkholderia oklahomensis EO147 (BOA) from cyanobacteria, Myxococcus xanthus (MBHA) and Pseudomonas fluorescens Pf0-1 (PFL) from bacteria, and ESA-2 from a macro red alga. The hemagglutination activities were commonly inhibited by the glycoproteins bearing high-mannose N-glycans, but not by monosaccharides examined, including mannose. In a direct binding experiment with pyridylaminated oligosaccharides, an isolectin EDA-2 exclusively bound to high-mannose type N-glycans, but not to other glycans that include complex types and a core pentasaccharide of N-glycans, indicating that it recognized the branched oligomannoside moiety. Its binding activity was subtly different among the oligomannoside structures examined, showing that the lectin has preference affinity for high-mannose type N-glycans with an exposed (α1-3) mannose residue in the D2 arm. Interestingly, EDAs, the mixture of three isolectins inhibited the growth of shrimp pathogenic bacterium, Vibrio alginolyticus, although it did not affect the growth of V. parahaemolyticus and V. harveyi. Growth inhibition of V. alginolyticus with EDAs was not observed in the presence of yeast mannan bearing high-mannose N-glycans, suggesting that EDAs caused the activity through binding to the target receptor(s) on the surface of V. alginolyticus. These results indicate that cultivated carrageenophyte E. denticulatum is a good source of a lectin(s) that may be useful as a carbohydrate probe and an antibacterial reagent.
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Affiliation(s)
- Le Dinh Hung
- Graduate School of Biosphere Science, Hiroshima University, Kagamiyama 1-4-4, Higashi, Hiroshima, 739-8528 Japan
- Nhatrang Institute of Technology Research and Application, Vietnam Academy of Science and Technology, 2A-Hungvuong Street, Nhatrang City, Khanhhoa Province Vietnam
| | - Makoto Hirayama
- Graduate School of Biosphere Science, Hiroshima University, Kagamiyama 1-4-4, Higashi, Hiroshima, 739-8528 Japan
| | - Bui Minh Ly
- Nhatrang Institute of Technology Research and Application, Vietnam Academy of Science and Technology, 2A-Hungvuong Street, Nhatrang City, Khanhhoa Province Vietnam
| | - Kanji Hori
- Graduate School of Biosphere Science, Hiroshima University, Kagamiyama 1-4-4, Higashi, Hiroshima, 739-8528 Japan
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Hori K, Hirayama M. Centrifugal ultrafiltration-HPLC method for interaction analysis between lectins and sugars. Methods Mol Biol 2014; 1200:173-83. [PMID: 25117235 DOI: 10.1007/978-1-4939-1292-6_16] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
The centrifugal ultrafiltration-HPLC method is a simple and rapid method for analyzing the binding interaction between lectins and sugars (oligosaccharides). In this method, a lectin is mixed with a fluorescent-labeled oligosaccharide in buffer and the unbound oligosaccharide recovered by centrifugal ultrafiltration is isolated and quantified by high-performance liquid chromatography. The binding activity is defined as a ratio (percentage) of the amount of bound oligosaccharide to that added, where the former is obtained by subtracting the amount of unbound oligosaccharide from the latter. The oligosaccharide-binding specificity of a lectin can be determined by comparing the binding activities with a variety of fluorescent-labeled oligosaccharides. The association constant and the optimum pH and temperature of the binding interaction between lectins and fluorescent-labeled oligosaccharides can be easily analyzed by this method.
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Affiliation(s)
- Kanji Hori
- Graduate School of Biosphere Science, Hiroshima University, Kagamiyama 1-4-4, Higashi-Hiroshima, 739-8528, Japan,
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Purification, Characterization, and cDNA Cloning of a Novel Lectin from the Green Alga,Codium barbatum. Biosci Biotechnol Biochem 2014; 76:805-11. [DOI: 10.1271/bbb.110944] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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Takeda Y, Seko A, Sakono M, Hachisu M, Koizumi A, Fujikawa K, Ito Y. Parallel quantification of lectin-glycan interaction using ultrafiltration. Carbohydr Res 2013; 375:112-7. [PMID: 23701871 DOI: 10.1016/j.carres.2013.04.032] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2013] [Revised: 04/24/2013] [Accepted: 04/26/2013] [Indexed: 01/23/2023]
Abstract
Using ultrafiltration membrane, a simple method for screening protein-ligand interaction was developed. The procedure comprises three steps: mixing ligand with protein, ultrafiltration of the solution, and quantification of unbound ligands by HPLC. By conducting analysis with variable protein concentrations, affinity constants were easily obtained. Multiple ligands can be analyzed simultaneously as a mixture, when concentration of ligands was controlled. Feasibility of this method for lectin-glycan interaction analysis was examined using fluorescently labeled high-mannose-type glycans and recombinant intracellular lectins or endo-α-mannosidase mutants. Estimated Ka values of malectin and VIP36 were in good agreement indeed with those evaluated by conventional methods such as isothermal titration calorimetry (ITC) or frontal affinity chromatography (FAC). Finally, several mutants of endo-α-mannosidase were produced and their affinities to monoglucosylated glycans were evaluated.
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Affiliation(s)
- Yoichi Takeda
- Japan Science and Technology Agency (JST), ERATO, Ito Glycotrilogy Project, Wako, Saitama, Japan.
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Active Targeting to Osteosarcoma Cells and Apoptotic Cell Death Induction by the Novel Lectin Eucheuma serra Agglutinin Isolated from a Marine Red Alga. JOURNAL OF DRUG DELIVERY 2012; 2012:842785. [PMID: 23346404 PMCID: PMC3543805 DOI: 10.1155/2012/842785] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/30/2012] [Accepted: 11/21/2012] [Indexed: 11/17/2022]
Abstract
Previously, we demonstrated that the novel lectin Eucheuma serra agglutinin from a marine red alga (ESA) induces apoptotic cell death in carcinoma. We now find that ESA induces apoptosis also in the case of sarcoma cells. First, propidium iodide assays with OST cells and LM8 cells showed a decrease in cell viability after addition of ESA. With 50 μg/ml ESA, the viabilities after 24 hours decreased to 54.7 ± 11.4% in the case of OST cells and to 41.7 ± 12.3% for LM8 cells. Second, using fluorescently labeled ESA and flow cytometric and fluorescence microscopic measurements, it could be shown that ESA does not bind to cells that were treated with glycosidases, indicating importance of the carbohydrate chains on the surface of the cells for efficient ESA-cell interactions. Third, Span 80 vesicles with surface-bound ESA as active targeting ligand were shown to display sarcoma cell binding activity, leading to apoptosis and complete OST cell death after 48 hours at 2 μg/ml ESA. The findings indicate that Span 80 vesicles with surface-bound ESA are a potentially useful drug delivery system not only for the treatment of carcinoma but also for the treatment of osteosarcoma.
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Sato Y, Morimoto K, Kubo T, Yanagihara K, Seyama T. High mannose-binding antiviral lectin PFL from Pseudomonas fluorescens Pf0-1 promotes cell death of gastric cancer cell MKN28 via interaction with α2-integrin. PLoS One 2012; 7:e45922. [PMID: 23029318 PMCID: PMC3447791 DOI: 10.1371/journal.pone.0045922] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2012] [Accepted: 08/27/2012] [Indexed: 02/05/2023] Open
Abstract
Novel anti-HIV lectin family which shows a strict binding specificity for high mannose glycans has been found in lower organisms. The bacterial orthologue has been identified in the genome of Pseudomonas fluorescens Pf0-1 and the gene coding a putative lectin was cloned, expressed in Escherichia coli and purified by one step gel filtration. Glycan array screening of the recombinant lectin, termed PFL, has revealed that PFL preferentially recognizes high mannose glycans with α1-3 Man that was highly exposed at the D2 position. In contrast, masking of this α1-3 Man with α1-2 Man dramatically impaired lectin-carbohydrate interactions. Reducing terminal disaccharide, GlcNAc-GlcNAc of high mannose glycans was also essential for PFL-binding. PFL showed a potent anti-influenza virus activity by inhibiting the virus entry into cells at doses of low nanomolar concentration. At micromolar concentration or higher, PFL showed a cytotoxicity accompanying loss of the cell adhesion against human gastric cancer MKN28 cells. The cell surface molecule to which PFL bound was co-precipitated with biotin-labeled PFL and identified as integrin α2 by peptide mass fingerprinting using MALDI-TOF mass spectrometry. Intriguingly, upon treatment with exogenous PFL, integrin α2 on the cell surface underwent rapid internalization to the cytoplasm and accumulated to perinuclear region, together with the bound PFL. The resulting loss of cell adherence would trigger a signaling pathway that induced anoikis-like cell death. These events were effectively inhibited by pretreatment of PFL with mannnan, indicating the involvement of high mannose glycans on PFL-induced cell death that was triggered by PFL-integrin α2 interactions.
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Affiliation(s)
- Yuichiro Sato
- Department of Medical Pharmacy, Faculty of Pharmacy, Yasuda Women's University, Hiroshima, Japan.
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Characterization of isoforms of the lectin isolated from the red algae Bryothamnion seaforthii and its pro-healing effect. Mar Drugs 2012; 10:1936-1954. [PMID: 23118713 PMCID: PMC3475265 DOI: 10.3390/md10091936] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2012] [Revised: 09/01/2012] [Accepted: 09/01/2012] [Indexed: 12/22/2022] Open
Abstract
Lectins are a structurally heterogeneous group of proteins that have specific binding sites for carbohydrates and glycoconjugates. Because of their biotechnological potential, lectins are widely used in biomedical research. The present study aimed to evaluate the healing potential of the lectin isolated from the marine red alga Bryothamnion seaforthii (BSL). The lectin was purified using ion exchange chromatography with DEAE cellulose and characterized using tandem mass spectrometry. For healing tests, skin wounds were induced in the dorsal thoracic region of mice. These animals were randomly divided into three groups and subjected to topical treatment for 12 days with BSL, bovine serum albumin and 150 mM NaCl. To evaluate the potential of each treatment, the animals were anesthetized and sacrificed on days 2, 7 and 12, respectively. The parameters evaluated included the wound area, the proportion of wound closure and the histological diagnosis. The wound closure was more effective with BSL (Postoperative Day 7 and 12) than controls. The luminal epithelium was completely restructured; the presence of collagen in the dermis and the strongly active presence of young skin annexes demonstrate the potential of treatment with BSL compared with controls. Our findings suggest that BSL has pro-healing properties and can be a potential medical process in the treatment of acute wounds.
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Stengel DB, Connan S, Popper ZA. Algal chemodiversity and bioactivity: sources of natural variability and implications for commercial application. Biotechnol Adv 2011; 29:483-501. [PMID: 21672617 DOI: 10.1016/j.biotechadv.2011.05.016] [Citation(s) in RCA: 242] [Impact Index Per Article: 18.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2011] [Revised: 05/29/2011] [Accepted: 05/30/2011] [Indexed: 02/06/2023]
Abstract
There has been significant recent interest in the commercial utilisation of algae based on their valuable chemical constituents many of which exhibit multiple bioactivities with applications in the food, cosmetic, agri- and horticultural sectors and in human health. Compounds of particular commercial interest include pigments, lipids and fatty acids, proteins, polysaccharides and phenolics which all display considerable diversity between and within taxa. The chemical composition of natural algal populations is further influenced by spatial and temporal changes in environmental parameters including light, temperature, nutrients and salinity, as well as biotic interactions. As reported bioactivities are closely linked to specific compounds it is important to understand, and be able to quantify, existing chemical diversity and variability. This review outlines the taxonomic, ecological and chemical diversity between, and within, different algal groups and the implications for commercial utilisation of algae from natural populations. The biochemical diversity and complexity of commercially important types of compounds and their environmental and developmental control are addressed. Such knowledge is likely to help achieve higher and more consistent levels of bioactivity in natural samples and may allow selective harvesting according to algal species and local environmental conditions for different groups of compounds.
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Affiliation(s)
- Dagmar B Stengel
- Botany and Plant Science, School of Natural Sciences, Ryan Institute for Environmental, Marine and Energy Research, National University of Ireland Galway, Ireland.
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Hung LD, Sato Y, Hori K. High-mannose N-glycan-specific lectin from the red alga Kappaphycus striatum (Carrageenophyte). PHYTOCHEMISTRY 2011; 72:855-61. [PMID: 21489583 DOI: 10.1016/j.phytochem.2011.03.009] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2011] [Revised: 03/02/2011] [Accepted: 03/11/2011] [Indexed: 05/13/2023]
Abstract
From a fresh sample (1 kg) of cultivated red alga Kappaphycus striatum, three isolectins, KSA-1 (15.1 mg), KSA-2 (58.0 mg) and KSA-3 (6.9 mg), were isolated by a combination of extraction with aqueous ethanol, ethanol precipitation, and ion exchange chromatography. Isolated KSAs were monomeric proteins of about 28kDa having identical 20N-terminal amino acid sequences to each other. Their hemagglutination activities were not inhibited by monosaccharides, but inhibited by glycoproteins bearing high-mannose N-glycans. In a binding experiment with pyridylaminated oligosaccharides by centrifugal ultrafiltration-HPLC assay, the isolectin KSA-2 was exclusively bound to high-mannose type N-glycans, but not to other glycans. Including complex types and a pentasaccharide core of N-glycans, indicating that it recognized branched oligomannosides. The binding activity of KSA-2 was slightly different among high-mannose N-glycans examined, indicating that the lectin has a higher affinity for those having the exposed (α1-3) Man in the D2 arm. On the other hand, KSA-2 did not bind to a free oligomannose that is a constituent of the branched oligomannosides, implying that the portion of the core GlcNAc residue(s) of the N-glycans is also essential for binding. Thus, KSA-2 appears to recognize the extended carbohydrate structure with a minimal length of a tetrasaccharide, Man(α1-3)Man(α1-6)Man(β1-4)GlcNAc. This study indicates that K. striatum, which has extensively been cultivated as a source of carrageenan, is a good source of a valuable lectin(s) that is strictly specific for high-mannose N-glycans.
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Affiliation(s)
- Le Dinh Hung
- Graduate School of Biosphere Science, Hiroshima University, Kagamiyama 1-4-4, Higashi - Hiroshima 739-8528, Japan; Nhatrang Institute of Technology Research and Application, 2A-Hungvuong Street, Nhatrang City, Khanhhoa Province, Viet Nam
| | - Yuichiro Sato
- Graduate School of Biosphere Science, Hiroshima University, Kagamiyama 1-4-4, Higashi - Hiroshima 739-8528, Japan; Faculty of Pharmacy, Yasuda Women's University, 6-13-1 Yasuhigashi, Asaminami, Hiroshima 731-0153, Japan
| | - Kanji Hori
- Graduate School of Biosphere Science, Hiroshima University, Kagamiyama 1-4-4, Higashi - Hiroshima 739-8528, Japan
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Sato Y, Hirayama M, Morimoto K, Yamamoto N, Okuyama S, Hori K. High mannose-binding lectin with preference for the cluster of alpha1-2-mannose from the green alga Boodlea coacta is a potent entry inhibitor of HIV-1 and influenza viruses. J Biol Chem 2011; 286:19446-58. [PMID: 21460211 DOI: 10.1074/jbc.m110.216655] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
The complete amino acid sequence of a lectin from the green alga Boodlea coacta (BCA), which was determined by a combination of Edman degradation of its peptide fragments and cDNA cloning, revealed the following: 1) B. coacta used a noncanonical genetic code (where TAA and TAG codons encode glutamine rather than a translation termination), and 2) BCA consisted of three internal tandem-repeated domains, each of which contains the sequence motif similar to the carbohydrate-binding site of Galanthus nivalis agglutinin-related lectins. Carbohydrate binding specificity of BCA was examined by a centrifugal ultrafiltration-HPLC assay using 42 pyridylaminated oligosaccharides. BCA bound to high mannose-type N-glycans but not to the complex-type, hybrid-type core structure of N-glycans or oligosaccharides from glycolipids. This lectin had exclusive specificity for α1-2-linked mannose at the nonreducing terminus. The binding activity was enhanced as the number of terminal α1-2-linked mannose substitutions increased. Mannobiose, mannotriose, and mannopentaose were incapable of binding to BCA. Thus, BCA preferentially recognized the nonreducing terminal α1-2-mannose cluster as a primary target. As predicted from carbohydrate-binding propensity, this lectin inhibited the HIV-1 entry into the host cells at a half-maximal effective concentration of 8.2 nm. A high association constant (3.71 × 10(8) M(-1)) of BCA with the HIV envelope glycoprotein gp120 was demonstrated by surface plasmon resonance analysis. Moreover, BCA showed the potent anti-influenza activity by directly binding to viral envelope hemagglutinin against various strains, including a clinical isolate of pandemic H1N1-2009 virus, revealing its potential as an antiviral reagent.
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Affiliation(s)
- Yuichiro Sato
- Faculty of Pharmacy, Yasuda Women's University, Asaminami, Hiroshima, Japan
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Harnedy PA, FitzGerald RJ. BIOACTIVE PROTEINS, PEPTIDES, AND AMINO ACIDS FROM MACROALGAE(1). JOURNAL OF PHYCOLOGY 2011; 47:218-32. [PMID: 27021854 DOI: 10.1111/j.1529-8817.2011.00969.x] [Citation(s) in RCA: 150] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Macroalgae are a diverse group of marine organisms that have developed complex and unique metabolic pathways to ensure survival in highly competitive marine environments. As a result, these organisms have been targeted for mining of natural biologically active components. The exploration of marine organisms has revealed numerous bioactive compounds that are proteinaceous in nature. These include proteins, linear peptides, cyclic peptides and depsipeptides, peptide derivatives, amino acids, and amino acid-like components. Furthermore, some species of macroalgae have been shown to contain significant levels of protein. While some protein-derived bioactive peptides have been characterized from macroalgae, macroalgal proteins currently still represent good candidate raw materials for biofunctional peptide mining. This review will provide an overview of the important bioactive amino-acid-containing compounds that have been identified in macroalgae. Moreover, the potential of macroalgal proteins as substrates for the generation of biofunctional peptides for utilization as functional foods to provide specific health benefits will be discussed.
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Sato Y, Morimoto K, Hirayama M, Hori K. High mannose-specific lectin (KAA-2) from the red alga Kappaphycus alvarezii potently inhibits influenza virus infection in a strain-independent manner. Biochem Biophys Res Commun 2011; 405:291-6. [PMID: 21219864 PMCID: PMC7092952 DOI: 10.1016/j.bbrc.2011.01.031] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2010] [Accepted: 01/06/2011] [Indexed: 01/22/2023]
Abstract
The carbohydrate binding profile of the red algal lectin KAA-2 from Kappaphycus alvarezii was evaluated by a centrifugal ultrafiltration–HPLC method using pyridylaminated oligosaccharides. KAA-2 bound exclusively to high mannose type N-glycans, but not to other glycans such as complex type, hybrid type, or the pentasaccharide core of N-glycans. This lectin exhibited a preference for an exposed α1–3 Man on a D2 arm in a similar manner to Eucheuma serra agglutinin (ESA-2), which shows various biological activities, such as anti-HIV and anti-carcinogenic activity. We tested the anti-influenza virus activity of KAA-2 against various strains including the recent pandemic H1N1-2009 influenza virus. KAA-2 inhibited infection of various influenza strains with EC50s of low nanomolar levels. Immunofluorescence microscopy using an anti-influenza antibody demonstrated that the antiviral activity of KAA-2 was exerted by interference with virus entry into host cells. This mechanism was further confirmed by the evidence of direct binding of KAA-2 to a viral envelope protein, hemagglutinin (HA), using an ELISA assay. These results indicate that this lectin would be useful as a novel antiviral reagent for the prevention of infection.
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Affiliation(s)
- Yuichiro Sato
- Faculty of Pharmacy, Yasuda Women's University, 6-13-1 Yasuhigashi, Asaminami, Hiroshima 731-0153, Japan
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Omokawa Y, Miyazaki T, Walde P, Akiyama K, Sugahara T, Masuda S, Inada A, Ohnishi Y, Saeki T, Kato K. In vitro and in vivo anti-tumor effects of novel Span 80 vesicles containing immobilized Eucheuma serra agglutinin. Int J Pharm 2010; 389:157-67. [PMID: 20100554 DOI: 10.1016/j.ijpharm.2010.01.033] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2009] [Revised: 01/15/2010] [Accepted: 01/19/2010] [Indexed: 11/24/2022]
Abstract
The lectin Eucheuma serra agglutinin (ESA) is known from previous studies to specifically bind to high-mannose type N-glycans and to induce apoptotic cancer cell death in vitro. In this study, Span 80 vesicles, with an average diameter between about 200 and 400 nm, containing immobilized ESA were prepared from the nonionic surfactant Span 80, also known as sorbitan monooleate. The vesicles were investigated in vitro and in vivo to evaluate the vesicles's potential applicability as novel drug delivery system. The results obtained are promising since the following was observed: (i) vesicular ESA had the same hemagglutinating activity as free ESA, demonstrating its biological activity when bound to the vesicles; (ii) vesicles containing immobilized ESA decreased the viability of Colo201 cancer cells in vitro while the growth of normal cells was not affected; (iii) the vesicles showed binding to Colo201 cells in vitro and caused inhibition of cancer cell growth in nude mice to which the vesicle-treated cells were added; (iv) the vesicles diminished tumor growth after intravenous administration to nude mice which contained an implanted Colo201 tumor; (v) the vesicles showed a tendency to accumulate at the site of the tumor 6h after i.v. administration to nude mice. Thus, all measurements carried out indicate that this type of Span 80 vesicle can be considered as promising alternatives to conventional phospholipid-based vesicles.
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Affiliation(s)
- Yousuke Omokawa
- Department of Materials Science and Biotechnology, Graduate School of Science and Engineering, Ehime University, 3 Bunkyo-cho, Matsuyama, Ehime 790-8577, Japan
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Freile-Pelegrin Y, Robledo D, Chan-Bacab MJ, Ortega-Morales BO. Antileishmanial properties of tropical marine algae extracts. Fitoterapia 2008; 79:374-7. [PMID: 18504078 DOI: 10.1016/j.fitote.2008.02.006] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2008] [Accepted: 02/25/2008] [Indexed: 11/24/2022]
Abstract
Aqueous and organic extracts of twenty-seven species of marine algae (14 species of Rhodophyta, 5 species of Phaeophyta and 8 species of Chlorophyta) collected from the Gulf of Mexico and Caribbean coast of the Yucatan Peninsula (Mexico) were evaluated for their antileishmanial in vitro activity against Leishmania mexicana promastigote forms. The cytotoxicity of these extracts was also assessed using brine shrimp. Organic extracts from Laurencia microcladia (Rhodophyta), Dictyota caribaea, Turbinaria turbinata and Lobophora variegata (Phaeophyta) possessed promising in vitro activity against L. mexicana promastigotes (LC(50) values ranging from 10.9 to 49.9 microg/ml). No toxicity of algal extracts against Artemia salina was observed with LC50 ranging from 119 to >or=1000 microg/ml. Further studies on bio-guided fractionation, isolation and characterization of pure compounds from these species as well as in vivo experiments are needed and are already in progress.
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Affiliation(s)
- Y Freile-Pelegrin
- Department of Marine Resources; Cinvestav, Km 6 Carretera Antigua a Progreso, Cordemex, 97310, A.P. 73, Mérida, Yuc., Mexico.
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