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Okoro EE, Maharjan R, Jabeen A, Ahmad MS, Azhar M, Shehla N, Zaman W, Shams S, Osoniyi OR, Onajobi FD, Choudhary MI. Isoflavanquinones from Abrus precatorius roots with their antiproliferative and anti-inflammatory effects. Phytochemistry 2021; 187:112743. [PMID: 33962136 DOI: 10.1016/j.phytochem.2021.112743] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Revised: 03/11/2021] [Accepted: 03/12/2021] [Indexed: 06/12/2023]
Abstract
Phytochemical studies on the root of Abrus precatorius Linn. (Fabaceae), leads towards the identification of four undescribed (abruquinones M, N, O, and P), and seven known abruquinones, (abruquinones A, E, B, F, I, D, and G). Spectroscopic analyses (1D, and 2D NMR, HRESI-MS) were used in elucidating structures of the all compounds. Evaluation of anticancer activities of the isolated isoflavanquinones revealed that abruquinones M, and N showed cytotoxicity against oral CAL-27 (IC50 values 6.48 and 5.26 μM, respectively), and colon (Caco-2) cell lines (IC50 values 15.79 and 10.33 μM, respectively). Abruquinone M also inhibited the growth of lung cancer cells (NCI-H460) with IC50 of 31.33 μM. The isolated isoflavanquiones also showed potent anti-inflammatory potential through phagocyte oxidative burst and pro-inflammatory cytokine TNF-α inhibition in vitro. These findings suggest isoflavanquinones from A. precatorius roots as candidates for further research in cancer treatment.
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Affiliation(s)
- Emeka E Okoro
- Biochemistry Department, Babcock University Ilishan-Remo, Ikeja, PMB 21244, Nigeria; Dr. Panjwani Center for Molecular Medicine and Drug Research (PCMD), International Center for Chemical and Biological Sciences, University of Karachi, Karachi, 75270, Pakistan; HEJ Research Institute of Chemistry, University of Karachi, Karachi, 75270, Pakistan; Biology Department, Adventist University of West Africa, Monrovia, Liberia.
| | - Rukesh Maharjan
- HEJ Research Institute of Chemistry, University of Karachi, Karachi, 75270, Pakistan
| | - Almas Jabeen
- Dr. Panjwani Center for Molecular Medicine and Drug Research (PCMD), International Center for Chemical and Biological Sciences, University of Karachi, Karachi, 75270, Pakistan
| | - Malik Shoaib Ahmad
- Dr. Panjwani Center for Molecular Medicine and Drug Research (PCMD), International Center for Chemical and Biological Sciences, University of Karachi, Karachi, 75270, Pakistan; HEJ Research Institute of Chemistry, University of Karachi, Karachi, 75270, Pakistan
| | - Mudassir Azhar
- Dr. Panjwani Center for Molecular Medicine and Drug Research (PCMD), International Center for Chemical and Biological Sciences, University of Karachi, Karachi, 75270, Pakistan
| | - Nuzhat Shehla
- HEJ Research Institute of Chemistry, University of Karachi, Karachi, 75270, Pakistan
| | - Wajid Zaman
- Dr. Panjwani Center for Molecular Medicine and Drug Research (PCMD), International Center for Chemical and Biological Sciences, University of Karachi, Karachi, 75270, Pakistan
| | - Sidrah Shams
- Dr. Panjwani Center for Molecular Medicine and Drug Research (PCMD), International Center for Chemical and Biological Sciences, University of Karachi, Karachi, 75270, Pakistan
| | - Omolaja R Osoniyi
- Department of Biochemistry and Molecular Biology, Obafemi Awolowo University, Ile Ife, Nigeria
| | - Funmilayo D Onajobi
- Biochemistry Department, Babcock University Ilishan-Remo, Ikeja, PMB 21244, Nigeria
| | - M Iqbal Choudhary
- Dr. Panjwani Center for Molecular Medicine and Drug Research (PCMD), International Center for Chemical and Biological Sciences, University of Karachi, Karachi, 75270, Pakistan; HEJ Research Institute of Chemistry, University of Karachi, Karachi, 75270, Pakistan
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Paul AA, Osoniyi OR, Eghianruwa QA, Oparinde OG, Adesina AS. Antioxidant activity of the simulated gastro-intestinal digestion hydrolysate of two edible Nigerian marine molluscs: Tympanatonus fuscatus var radula (L.) and Pachymelania aurita (M.). Int J Biochem Mol Biol 2021; 12:8-16. [PMID: 33824776 PMCID: PMC8012820] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 10/03/2020] [Accepted: 02/10/2021] [Indexed: 06/12/2023]
Abstract
The multifunctional nature of antioxidant peptides makes them more attractive candidates as dietary ingredients in health maintenance. Therefore, food protein-derived antioxidant peptides are continuously investigated. This study investigated the in vitro antioxidant properties of hydrolysate and ultrafiltered peptide fractions of Pachymelania aurita and Tympanatonus fuscatus var radula-two commonly consumed marine molluscs known as periwinkles in southern Nigeria. Simulated gastrointestinal digestion (SGID) of soluble proteins of T. fuscatus and P. aurita was carried out using pepsin, trypsin and chymotrypsin, and the SGID hydrolysates were fractionated using a 3 kDa membrane filter. The hydrolysates and their fractions were investigated for anti-lipid peroxidation, hydroxyl radical scavenging activity (HRSA), ferric reducing antioxidant property (FRAP) and metal chelation activity, and they demonstrated clear antioxidant properties in all the assay models used. Low molecular weight fractions of the hydrolysates demonstrated more potent antioxidant activity than higher molecular weight fractions. This is profound in the metal chelation assay, where low molecular weight peptide fractions, T ≤ 3 kDa and P ≤ 3 kDa (IC50 values of 8.10 ± 0.011 and 5.56 ± 0.50 µg/ml respectively) had activity that is similar to that of EDTA (11.84 ± 0.89 µg/ml). Similar activity effects were observed in other assays where there was about 3-fold higher activity in low molecular weight fractions. These results demonstrate the presence of antioxidant peptide(s) in the protein hydrolysates of the periwinkles.
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Affiliation(s)
- Abraham A Paul
- Department of Biochemistry and Molecular Biology Obafemi Awolowo UniversityIle-Ife, Nigeria
- Department of Biotechnology Engineering, Ben-Gurion University of The NegevBeer-Sheva 84105, Israel
| | - Omolaja R Osoniyi
- Department of Biochemistry and Molecular Biology Obafemi Awolowo UniversityIle-Ife, Nigeria
| | - Queensley A Eghianruwa
- Department of Biochemistry, Faculty of Basic Medical Sciences, University of UyoUyo, Nigeria
| | - Olayemi G Oparinde
- Department of Biochemistry and Molecular Biology Obafemi Awolowo UniversityIle-Ife, Nigeria
| | - Adetunji S Adesina
- Department of Biochemistry and Molecular Biology Obafemi Awolowo UniversityIle-Ife, Nigeria
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Okoro EE, Osoniyi OR, Jabeen A, Shams S, Choudhary MI, Onajobi FD. Anti-proliferative and immunomodulatory activities of fractions from methanol root extract of Abrus precatorius L. Clin Phytosci 2019. [DOI: 10.1186/s40816-019-0143-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Abstract
Background
Abrus precatorius possesses various therapeutic properties including anticancer potentials. This study evaluated the anti-proliferative activities of fractions of methanol root extract of A. precatorius on breast and cervical cancer cells and their immunomodulatory effect. Phytochemical screening was done by FTIR and GCMS. In vitro anti-proliferative effect was evaluated on human breast cancer (AU565) and cervical cancer (HeLa) cells and on murine fibroblast (NIH 3 T3) cells. Antioxidant activity was performed via DPPH radical scavenging assay. The immunomodulatory potential of fractions was evaluated by inhibition of phagocytes oxidative burst (ROS), Nitric oxide (NO) and proinflammatory cytokine TNF-α.
Results
A. precatorius fractions showed different chemical groups and were somewhat selective in antiproliferative activity against studied cancer cells. Ethyl acetate fraction showed the most significant antiproliferative activity with IC50 values of 18.10 μg/mL and 11.89 μg/mL against AU565 and HeLa cells respectively. Hexane fraction significantly (p < 0.05) inhibited HeLa cells (IC50 18.24 ± 0.16 μg/mL), whereas aqueous fraction showed mild inhibition (IC50 46.46 ± 0.14 μg/mL) on AU565 cell proliferation. All fractions showed no cytotoxicity against NIH-3 T3 murine fibroblast normal cells. All fractions showed potent and significant (p < 0.001) DPPH radical scavenging activity as well as suppressed phagocytic oxidative burst. Hexane (< 1 μg/mL), ethyl acetate (< 1 μg/mL), and butanol (5.74 μg/mL) fractions potently inhibited the cytokine TNF- α, hexane (< 1 μg/mL) and ethyl acetate (< 1 μg/mL) fractions also potently inhibited NO.
Conclusions
The antiproliferative activities and suppressive effect on the phagocytic oxidative burst, NO and proinflammatory cytokine might be due to the synergistic actions of bioactive compounds especially flavonoids present in the assayed fractions and therefore, suggest chemotherapeutic use of A. precatorius in cancer treatment.
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Okeke IN, Babalola CP, Byarugaba DK, Djimde A, Osoniyi OR. Broadening Participation in the Sciences within and from Africa: Purpose, Challenges, and Prospects. CBE Life Sci Educ 2017; 16:16/2/es2. [PMID: 28408409 PMCID: PMC5459259 DOI: 10.1187/cbe.15-12-0265] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2015] [Revised: 12/29/2016] [Accepted: 01/06/2017] [Indexed: 06/02/2023]
Abstract
Many of Africa's challenges have scientific solutions, but there are fewer individuals engaged in scientific activity per capita on this continent than on any other. Only a handful of African scientists use their skills to capacity or are leaders in their disciplines. Underrepresentation of Africans in scientific practice, discourse, and decision making reduces the richness of intellectual contributions toward hard problems worldwide. This essay outlines challenges faced by teacher-scholars from sub-Saharan Africa as we build scientific expertise. Access to tertiary-level science is difficult and uneven across Africa, and the quality of training available varies from top-range to inadequate. Access to science higher education needs to increase, particularly for female students, first-generation literates, and rural populations. We make suggestions for collaborative initiatives involving stakeholders outside Africa and/or outside academia that could extend educational opportunities available to African students and increase the chance that Africa-based expertise is globally available.
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Affiliation(s)
- Iruka N Okeke
- Faculty of Pharmacy, University of Ibadan, Ibadan, Nigeria
| | | | - Denis K Byarugaba
- Department of Microbiology, Makerere University, Kampala 7062, Uganda
| | - Abdoulaye Djimde
- Malaria Research and Training Center, Department of Epidemiology of Parasitic Diseases, Faculty of Pharmacy, University of Science, Techniques and Technologies of Bamako, Bamako, Mali
| | - Omolaja R Osoniyi
- Department of Biochemistry, Obafemi Awolowo University, Ile-Ife, Nigeria
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