Anticancer and Antimicrobial Activities of Some Antioxidant-Rich Cameroonian Medicinal Plants
Publication Date
February 11, 2013
Journal
PLOS ONE
Authors
Jean De Dieu Tamokou, Jean Rodolphe Chouna, Eva Fischer Fodor, Gabriela Chereches, et al
Volume
8
Issue
2
Pages
e55880
DOI
https://dx.plos.org/10.1371/journal.pone.0055880
Publisher URL
http://journals.plos.org/plosone/article?id=10.1371%2Fjournal.pone.0055880
PubMed
http://www.ncbi.nlm.nih.gov/pubmed/23409075
PubMed Central
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3569468
Europe PMC
http://europepmc.org/abstract/MED/23409075
Web of Science
000315100000029
Scopus
84873735501
Mendeley
http://www.mendeley.com/research/anticancer-antimicrobial-activities-some-antioxidantrich-cameroonian-medicinal-plants
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Mendeley | Further Information

{"title"=>"Anticancer and Antimicrobial Activities of Some Antioxidant-Rich Cameroonian Medicinal Plants", "type"=>"journal", "authors"=>[{"first_name"=>"Jean de Dieu", "last_name"=>"Tamokou", "scopus_author_id"=>"23502430500"}, {"first_name"=>"Jean Rodolphe", "last_name"=>"Chouna", "scopus_author_id"=>"26435688800"}, {"first_name"=>"Eva", "last_name"=>"Fischer-Fodor", "scopus_author_id"=>"25640969600"}, {"first_name"=>"Gabriela", "last_name"=>"Chereches", "scopus_author_id"=>"23476356600"}, {"first_name"=>"Otilia", "last_name"=>"Barbos", "scopus_author_id"=>"34881415000"}, {"first_name"=>"Grigore", "last_name"=>"Damian", "scopus_author_id"=>"6603588424"}, {"first_name"=>"Daniela", "last_name"=>"Benedec", "scopus_author_id"=>"20733431200"}, {"first_name"=>"Mihaela", "last_name"=>"Duma", "scopus_author_id"=>"55823889100"}, {"first_name"=>"Alango Pépin Nkeng", "last_name"=>"Efouet", "scopus_author_id"=>"37661361600"}, {"first_name"=>"Hippolyte Kamdem", "last_name"=>"Wabo", "scopus_author_id"=>"9436063400"}, {"first_name"=>"Jules Roger", "last_name"=>"Kuiate", "scopus_author_id"=>"6603277289"}, {"first_name"=>"Augustin", "last_name"=>"Mot", "scopus_author_id"=>"23978464400"}, {"first_name"=>"Radu", "last_name"=>"Silaghi-Dumitrescu", "scopus_author_id"=>"6602151260"}], "year"=>2013, "source"=>"PLoS ONE", "identifiers"=>{"sgr"=>"84873735501", "doi"=>"10.1371/journal.pone.0055880", "issn"=>"19326203", "pui"=>"368331361", "isbn"=>"1932-6203", "pmid"=>"23409075", "scopus"=>"2-s2.0-84873735501"}, "id"=>"b5507293-f6d2-309e-a120-ee983d9f0bb0", "abstract"=>"Traditional remedies have a long-standing history in Cameroon and continue to provide useful and applicable tools for treating ailments. Here, the anticancer, antimicrobial and antioxidant activities of ten antioxidant-rich Cameroonian medicinal plants and of some of their isolated compounds are evaluated.The plant extracts were prepared by maceration in organic solvents. Fractionation of plant extract was performed by column chromatography and the structures of isolated compounds (emodin, 3-geranyloxyemodin, 2-geranylemodin) were confirmed spectroscopically. The antioxidant activity (AOA) was determined using the 1,1-diphenyl-2-picrylhydrazyl (DPPH) bleaching method, the trolox equivalent antioxidant capacity (TEAC), and the hemoglobin ascorbate peroxidase activity inhibition (HAPX) assays. The anticancer activity was evaluated against A431 squamous epidermal carcinoma, WM35 melanoma, A2780 ovary carcinoma and cisplatin-resistant A2780cis cells, using a direct colorimetric assay. The total phenolic content in the extracts was determined spectrophotometrically by the Folin-Ciocalteu method. Rumex abyssinicus showed the best AOA among the three assays employed. The AOA of emodin was significantly higher than that of 3-geranyloxyemodin and 2-geranylemodin for both TEAC and HAPX methods. The lowest IC(50) values (i.e., highest cytotoxicity) were found for the extracts of Vismia laurentii, Psorospermum febrifugum, Pentadesma butyracea and Ficus asperifolia. The Ficus asperifolia and Psorospermum febrifugum extracts are selective against A2780cis ovary cells, a cell line which is resistant to the standard anticancer drug cisplatin. Emodin is more toxic compared to the whole extract, 3-geranyloxyemodin and 2-geranylemodin. Its selectivity against the platinum-resistant A2780cis cell line is highest. All of the extracts display antimicrobial activity, in some cases comparable to that of gentamycin.", "link"=>"http://www.mendeley.com/research/anticancer-antimicrobial-activities-some-antioxidantrich-cameroonian-medicinal-plants", "reader_count"=>67, "reader_count_by_academic_status"=>{"Unspecified"=>4, "Professor > Associate Professor"=>2, "Researcher"=>8, "Student > Doctoral Student"=>1, "Student > Ph. D. Student"=>22, "Student > Postgraduate"=>2, "Other"=>4, "Student > Master"=>14, "Student > Bachelor"=>5, "Lecturer"=>1, "Lecturer > Senior Lecturer"=>1, "Professor"=>3}, "reader_count_by_user_role"=>{"Unspecified"=>4, "Professor > Associate Professor"=>2, "Researcher"=>8, "Student > Doctoral Student"=>1, "Student > Ph. D. Student"=>22, "Student > Postgraduate"=>2, "Other"=>4, "Student > Master"=>14, "Student > Bachelor"=>5, "Lecturer"=>1, "Lecturer > Senior Lecturer"=>1, "Professor"=>3}, "reader_count_by_subject_area"=>{"Unspecified"=>5, "Environmental Science"=>1, "Biochemistry, Genetics and Molecular Biology"=>11, "Agricultural and Biological Sciences"=>21, "Medicine and Dentistry"=>8, "Pharmacology, Toxicology and Pharmaceutical Science"=>6, "Veterinary Science and Veterinary Medicine"=>1, "Chemistry"=>13, "Social Sciences"=>1}, "reader_count_by_subdiscipline"=>{"Medicine and Dentistry"=>{"Medicine and Dentistry"=>8}, "Chemistry"=>{"Chemistry"=>13}, "Social Sciences"=>{"Social Sciences"=>1}, "Agricultural and Biological Sciences"=>{"Agricultural and Biological Sciences"=>21}, "Biochemistry, Genetics and Molecular Biology"=>{"Biochemistry, Genetics and Molecular Biology"=>11}, "Unspecified"=>{"Unspecified"=>5}, "Environmental Science"=>{"Environmental Science"=>1}, "Pharmacology, Toxicology and Pharmaceutical Science"=>{"Pharmacology, Toxicology and Pharmaceutical Science"=>6}, "Veterinary Science and Veterinary Medicine"=>{"Veterinary Science and Veterinary Medicine"=>1}}, "reader_count_by_country"=>{"Romania"=>1, "Uganda"=>1, "Malaysia"=>1, "India"=>2}, "group_count"=>1}

Scopus | Further Information

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Figshare

  • {"files"=>["https://ndownloader.figshare.com/files/492005"], "description"=>"<p>Antimicrobial activities (diameters of growth inhibition zones in mm) of plant extracts examined in the present study.</p>", "links"=>[], "tags"=>["activities", "inhibition", "zones", "extracts", "examined"], "article_id"=>162503, "categories"=>["Cancer", "Biochemistry", "Chemistry", "Pharmacology", "Plant Biology"], "users"=>["Jean de Dieu Tamokou", "Jean Rodolphe Chouna", "Eva Fischer-Fodor", "Gabriela Chereches", "Otilia Barbos", "Grigore Damian", "Daniela Benedec", "Mihaela Duma", "Alango Pépin Nkeng Efouet", "Hippolyte Kamdem Wabo", "Jules Roger Kuiate", "Augustin Mot", "Radu Silaghi-Dumitrescu"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0055880.t004", "stats"=>{"downloads"=>2, "page_views"=>8, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Antimicrobial_activities_diameters_of_growth_inhibition_zones_in_mm_of_plant_extracts_examined_in_the_present_study_/162503", "title"=>"Antimicrobial activities (diameters of growth inhibition zones in mm) of plant extracts examined in the present study.", "pos_in_sequence"=>0, "defined_type"=>3, "published_date"=>"2013-02-19 15:39:57"}
  • {"files"=>["https://ndownloader.figshare.com/files/491049"], "description"=>"<p>The cytotoxic effect was evaluated in four tumoral cells and is compared with their effect on normal human lymphocytes. Cells were treated in triplicate with eight different concentrations from the extract diluted in cell-friendly, non-toxic buffer, and the inhibitory effect against the treated cells proliferation was appraised after 24 hours.</p>", "links"=>[], "tags"=>["chemistry", "plant biology", "oncology", "pharmacology", "Biochemistry"], "article_id"=>161549, "categories"=>["Cancer", "Biochemistry", "Chemistry", "Pharmacology", "Plant Biology"], "users"=>["Jean de Dieu Tamokou", "Jean Rodolphe Chouna", "Eva Fischer-Fodor", "Gabriela Chereches", "Otilia Barbos", "Grigore Damian", "Daniela Benedec", "Mihaela Duma", "Alango Pépin Nkeng Efouet", "Hippolyte Kamdem Wabo", "Jules Roger Kuiate", "Augustin Mot", "Radu Silaghi-Dumitrescu"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0055880.g008", "stats"=>{"downloads"=>1, "page_views"=>18, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Cytotoxic_effect_of_Ficus_asperifolia_/161549", "title"=>"Cytotoxic effect of <i>Ficus asperifolia.</i>", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2013-02-19 15:34:35"}
  • {"files"=>["https://ndownloader.figshare.com/files/491959"], "description"=>"<p>Botanical identification, parts used, extraction solvent/yield and traditional therapeutic indications of medicinal plants studied.</p>", "links"=>[], "tags"=>["parts", "extraction", "therapeutic", "indications", "medicinal", "plants"], "article_id"=>162459, "categories"=>["Cancer", "Biochemistry", "Chemistry", "Pharmacology", "Plant Biology"], "users"=>["Jean de Dieu Tamokou", "Jean Rodolphe Chouna", "Eva Fischer-Fodor", "Gabriela Chereches", "Otilia Barbos", "Grigore Damian", "Daniela Benedec", "Mihaela Duma", "Alango Pépin Nkeng Efouet", "Hippolyte Kamdem Wabo", "Jules Roger Kuiate", "Augustin Mot", "Radu Silaghi-Dumitrescu"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0055880.t001", "stats"=>{"downloads"=>1, "page_views"=>7, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Botanical_identification_parts_used_extraction_solvent_yield_and_traditional_therapeutic_indications_of_medicinal_plants_studied_/162459", "title"=>"Botanical identification, parts used, extraction solvent/yield and traditional therapeutic indications of medicinal plants studied.", "pos_in_sequence"=>0, "defined_type"=>3, "published_date"=>"2013-02-19 15:39:40"}
  • {"files"=>["https://ndownloader.figshare.com/files/490287"], "description"=>"<p>The compounds isolated from <i>Psorospermum febrifugum</i> using column chromatography and identified using physicochemical and spectroscopic data were emodin (A), 3-geranyloxyemodin (B) and 2-geranylemodin (C).</p>", "links"=>[], "tags"=>["structures"], "article_id"=>160780, "categories"=>["Cancer", "Biochemistry", "Chemistry", "Pharmacology", "Plant Biology"], "users"=>["Jean de Dieu Tamokou", "Jean Rodolphe Chouna", "Eva Fischer-Fodor", "Gabriela Chereches", "Otilia Barbos", "Grigore Damian", "Daniela Benedec", "Mihaela Duma", "Alango Pépin Nkeng Efouet", "Hippolyte Kamdem Wabo", "Jules Roger Kuiate", "Augustin Mot", "Radu Silaghi-Dumitrescu"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0055880.g001", "stats"=>{"downloads"=>4, "page_views"=>9, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Chemical_structures_of_the_isolated_compounds_/160780", "title"=>"Chemical structures of the isolated compounds.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2013-02-19 15:30:28"}
  • {"files"=>["https://ndownloader.figshare.com/files/491737"], "description"=>"<p>Differences between anticancer activity of <i>Psorospermum febrifugum</i> extract and its isolated compounds against four different cancer cell lines.</p>", "links"=>[], "tags"=>["extract", "emodines"], "article_id"=>162247, "categories"=>["Cancer", "Biochemistry", "Chemistry", "Pharmacology", "Plant Biology"], "users"=>["Jean de Dieu Tamokou", "Jean Rodolphe Chouna", "Eva Fischer-Fodor", "Gabriela Chereches", "Otilia Barbos", "Grigore Damian", "Daniela Benedec", "Mihaela Duma", "Alango Pépin Nkeng Efouet", "Hippolyte Kamdem Wabo", "Jules Roger Kuiate", "Augustin Mot", "Radu Silaghi-Dumitrescu"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0055880.g013", "stats"=>{"downloads"=>0, "page_views"=>21, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Comparison_between_Psorospermum_febrifugum_extract_and_emodines_cytotoxicity_/162247", "title"=>"Comparison between <i>Psorospermum febrifugum</i> extract and emodines cytotoxicity.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2013-02-19 15:38:26"}
  • {"files"=>["https://ndownloader.figshare.com/files/490619"], "description"=>"<p>Gallic acid was used as standard in place of trolox. Gallic acid equivalent antioxidant capacity (GEAC; µg/mL) of tested samples obtained by the TEAC procedure. Bars represent the mean ± SD of three independent experiments carried out in triplicate. Letters a-i indicate significant differences between samples according to one way ANOVA and Waller Duncan test; <i>p</i><0.05.</p>", "links"=>[], "tags"=>["teac"], "article_id"=>161128, "categories"=>["Cancer", "Biochemistry", "Chemistry", "Pharmacology", "Plant Biology"], "users"=>["Jean de Dieu Tamokou", "Jean Rodolphe Chouna", "Eva Fischer-Fodor", "Gabriela Chereches", "Otilia Barbos", "Grigore Damian", "Daniela Benedec", "Mihaela Duma", "Alango Pépin Nkeng Efouet", "Hippolyte Kamdem Wabo", "Jules Roger Kuiate", "Augustin Mot", "Radu Silaghi-Dumitrescu"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0055880.g004", "stats"=>{"downloads"=>3, "page_views"=>17, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Antioxidant_activity_determined_using_TEAC_method_/161128", "title"=>"Antioxidant activity determined using TEAC method.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2013-02-19 15:32:19"}
  • {"files"=>["https://ndownloader.figshare.com/files/491864"], "description"=>"<p>IC<sub>50</sub> values (in ng/mL) of studied plant extracts against cancer cell lines and primary lymphocyte culture.</p>", "links"=>[], "tags"=>["studied", "extracts", "cancer", "lines", "lymphocyte"], "article_id"=>162371, "categories"=>["Cancer", "Biochemistry", "Chemistry", "Pharmacology", "Plant Biology"], "users"=>["Jean de Dieu Tamokou", "Jean Rodolphe Chouna", "Eva Fischer-Fodor", "Gabriela Chereches", "Otilia Barbos", "Grigore Damian", "Daniela Benedec", "Mihaela Duma", "Alango Pépin Nkeng Efouet", "Hippolyte Kamdem Wabo", "Jules Roger Kuiate", "Augustin Mot", "Radu Silaghi-Dumitrescu"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0055880.t002", "stats"=>{"downloads"=>1, "page_views"=>4, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_IC_50_values_in_ng_mL_of_studied_plant_extracts_against_cancer_cell_lines_and_primary_lymphocyte_culture_/162371", "title"=>"IC<sub>50</sub> values (in ng/mL) of studied plant extracts against cancer cell lines and primary lymphocyte culture.", "pos_in_sequence"=>0, "defined_type"=>3, "published_date"=>"2013-02-19 15:39:09"}
  • {"files"=>["https://ndownloader.figshare.com/files/491315"], "description"=>"<p>Cancer cell growth inhibitory activity of <i>Vismia laurentii</i> extract against four different cancer cell lines.</p>", "links"=>[], "tags"=>["inhibitory"], "article_id"=>161827, "categories"=>["Cancer", "Biochemistry", "Chemistry", "Pharmacology", "Plant Biology"], "users"=>["Jean de Dieu Tamokou", "Jean Rodolphe Chouna", "Eva Fischer-Fodor", "Gabriela Chereches", "Otilia Barbos", "Grigore Damian", "Daniela Benedec", "Mihaela Duma", "Alango Pépin Nkeng Efouet", "Hippolyte Kamdem Wabo", "Jules Roger Kuiate", "Augustin Mot", "Radu Silaghi-Dumitrescu"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0055880.g010", "stats"=>{"downloads"=>1, "page_views"=>6, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Cancer_cell_growth_inhibitory_activity_of_Vismia_laurentii_extract_/161827", "title"=>"Cancer cell growth inhibitory activity of <i>Vismia laurentii</i> extract.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2013-02-19 15:36:09"}
  • {"files"=>["https://ndownloader.figshare.com/files/490500"], "description"=>"<p>Area under the kinetic curve of the DPPH bleaching by the test samples for the first 136 s. Bars represent the mean ± SD of three independent experiments carried out in triplicate. Letters a–d indicate significant differences between samples according to one way ANOVA and Waller Duncan test; <i>p</i><0.05.</p>", "links"=>[], "tags"=>["evaluated", "dpph"], "article_id"=>161007, "categories"=>["Cancer", "Biochemistry", "Chemistry", "Pharmacology", "Plant Biology"], "users"=>["Jean de Dieu Tamokou", "Jean Rodolphe Chouna", "Eva Fischer-Fodor", "Gabriela Chereches", "Otilia Barbos", "Grigore Damian", "Daniela Benedec", "Mihaela Duma", "Alango Pépin Nkeng Efouet", "Hippolyte Kamdem Wabo", "Jules Roger Kuiate", "Augustin Mot", "Radu Silaghi-Dumitrescu"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0055880.g003", "stats"=>{"downloads"=>0, "page_views"=>1, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Antioxidant_activity_evaluated_by_DPPH_method_/161007", "title"=>"Antioxidant activity evaluated by DPPH method.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2013-02-19 15:31:41"}
  • {"files"=>["https://ndownloader.figshare.com/files/491907"], "description"=>"<p>IC<sub>50</sub> values (in µg/mL) of <i>Psorospermum febrifugum</i> extract and its isolated compounds against four different cancer cell lines.</p>", "links"=>[], "tags"=>["extract", "compounds", "cancer"], "article_id"=>162416, "categories"=>["Cancer", "Biochemistry", "Chemistry", "Pharmacology", "Plant Biology"], "users"=>["Jean de Dieu Tamokou", "Jean Rodolphe Chouna", "Eva Fischer-Fodor", "Gabriela Chereches", "Otilia Barbos", "Grigore Damian", "Daniela Benedec", "Mihaela Duma", "Alango Pépin Nkeng Efouet", "Hippolyte Kamdem Wabo", "Jules Roger Kuiate", "Augustin Mot", "Radu Silaghi-Dumitrescu"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0055880.t003", "stats"=>{"downloads"=>0, "page_views"=>4, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_IC_50_values_in_181_g_mL_of_Psorospermum_febrifugum_extract_and_its_isolated_compounds_against_four_different_cancer_cell_lines_/162416", "title"=>"IC<sub>50</sub> values (in µg/mL) of <i>Psorospermum febrifugum</i> extract and its isolated compounds against four different cancer cell lines.", "pos_in_sequence"=>0, "defined_type"=>3, "published_date"=>"2013-02-19 15:39:25"}
  • {"files"=>["https://ndownloader.figshare.com/files/491455"], "description"=>"<p>The mitochondrial enzyme-based cytotoxic activity was validated with an independent cell viability test ruled on the reductive capacity of intact healthy living cells. Fluorescence measurements after a 24-hour exposure of the cells indicate a good correlation between the IC50 concentrations obtained by absorbance (colorimetric evaluation).</p>", "links"=>[], "tags"=>["tested"], "article_id"=>161966, "categories"=>["Cancer", "Biochemistry", "Chemistry", "Pharmacology", "Plant Biology"], "users"=>["Jean de Dieu Tamokou", "Jean Rodolphe Chouna", "Eva Fischer-Fodor", "Gabriela Chereches", "Otilia Barbos", "Grigore Damian", "Daniela Benedec", "Mihaela Duma", "Alango Pépin Nkeng Efouet", "Hippolyte Kamdem Wabo", "Jules Roger Kuiate", "Augustin Mot", "Radu Silaghi-Dumitrescu"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0055880.g011", "stats"=>{"downloads"=>0, "page_views"=>2, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Cytotoxic_activity_for_the_tested_extracts_/161966", "title"=>"Cytotoxic activity for the tested extracts.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2013-02-19 15:36:57"}
  • {"files"=>["https://ndownloader.figshare.com/files/490396"], "description"=>"<p>The total phenolic content is expressed as gallic acid equivalent (GE; µg/mL) in final plant extracts. Bars represent the mean ± SD of three independent experiments carried out in triplicate. Letters a–i indicate significant differences between samples according to one way ANOVA and Waller Duncan test; <i>p</i><0.05.</p>", "links"=>[], "tags"=>["phenol", "studied"], "article_id"=>160909, "categories"=>["Cancer", "Biochemistry", "Chemistry", "Pharmacology", "Plant Biology"], "users"=>["Jean de Dieu Tamokou", "Jean Rodolphe Chouna", "Eva Fischer-Fodor", "Gabriela Chereches", "Otilia Barbos", "Grigore Damian", "Daniela Benedec", "Mihaela Duma", "Alango Pépin Nkeng Efouet", "Hippolyte Kamdem Wabo", "Jules Roger Kuiate", "Augustin Mot", "Radu Silaghi-Dumitrescu"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0055880.g002", "stats"=>{"downloads"=>0, "page_views"=>10, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Total_phenol_content_of_the_studied_extracts_/160909", "title"=>"Total phenol content of the studied extracts.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2013-02-19 15:31:08"}
  • {"files"=>["https://ndownloader.figshare.com/files/490814"], "description"=>"<p>The EPR spectra of the ethanolic extracts of the studied plants were grouped according to shapes and/or intensity (panels A, B) and several phenolic references (C) treated with sodium hydroxide (final pH 12.7) for 15 s and measured at 100 K. <b>A.</b> a - <i>Rumex bequaertii</i>, b - <i>Rumex abyssinicus</i>, c - <i>Dichrostachys glomerata</i>, inset (y-axis scale is 100 times shorter): d - <i>Tectona grandis</i>, e - <i>Paullinia pinnata</i>, f - <i>Hibiscus asper</i>; <b>B.</b> a - <i>Pentadesma butyracea</i>, b - <i>Vismia laurentii</i>, c - <i>Ficus asperifolia</i>, d - <i>Psorospermum febrifugum</i>; <b>C.</b> a - luteolin, b - hydroquinone, c – caffeic acid, d - quercetin, e - rutin, f - gallic acid.</p>", "links"=>[], "tags"=>["spectra", "studied"], "article_id"=>161319, "categories"=>["Cancer", "Biochemistry", "Chemistry", "Pharmacology", "Plant Biology"], "users"=>["Jean de Dieu Tamokou", "Jean Rodolphe Chouna", "Eva Fischer-Fodor", "Gabriela Chereches", "Otilia Barbos", "Grigore Damian", "Daniela Benedec", "Mihaela Duma", "Alango Pépin Nkeng Efouet", "Hippolyte Kamdem Wabo", "Jules Roger Kuiate", "Augustin Mot", "Radu Silaghi-Dumitrescu"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0055880.g006", "stats"=>{"downloads"=>1, "page_views"=>4, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_EPR_spectra_of_the_studied_extracts_/161319", "title"=>"EPR spectra of the studied extracts.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2013-02-19 15:33:23"}
  • {"files"=>["https://ndownloader.figshare.com/files/490710"], "description"=>"<p>Inhibition of the ascorbic acid consumption (IAC in %) by the tested samples determined by the HAPX method. Bars represent the mean ± SD of three independent experiments carried out in triplicate. Letters a-e indicate significant differences between samples according to one way ANOVA and Waller Duncan test; <i>p</i><0.05.</p>", "links"=>[], "tags"=>["hapx"], "article_id"=>161221, "categories"=>["Cancer", "Biochemistry", "Chemistry", "Pharmacology", "Plant Biology"], "users"=>["Jean de Dieu Tamokou", "Jean Rodolphe Chouna", "Eva Fischer-Fodor", "Gabriela Chereches", "Otilia Barbos", "Grigore Damian", "Daniela Benedec", "Mihaela Duma", "Alango Pépin Nkeng Efouet", "Hippolyte Kamdem Wabo", "Jules Roger Kuiate", "Augustin Mot", "Radu Silaghi-Dumitrescu"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0055880.g005", "stats"=>{"downloads"=>1, "page_views"=>5, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Antioxidant_activity_determined_by_the_HAPX_method_/161221", "title"=>"Antioxidant activity determined by the HAPX method.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2013-02-19 15:32:51"}
  • {"files"=>["https://ndownloader.figshare.com/files/490951"], "description"=>"<p>Dendogram is obtained using Ward’s linkage showing grouping of the plant extracts according to their EPR spectrum profiles. Group A: subgroup 1 <i>Rumex bequaertii</i>, <i>Rumex abyssinicus</i>, <i>Dichrostachys glomerata</i> (labelled in black), subgroup 2: <i>Tectona grandis</i>, <i>Paullinia pinnata</i>, <i>Hibiscus asper</i> (labelled in grey, on the right); Group B: <i>Pentadesma butyracea</i>, <i>Vismia laurentii</i>, <i>Ficus asperifolia</i>, <i>Psorospermum febrifugum</i> (labelled in grey, on the left) (details on EPR spectra profile in <a href=\"http://www.plosone.org/article/info:doi/10.1371/journal.pone.0055880#pone-0055880-g006\" target=\"_blank\">Figure 6</a>).</p>", "links"=>[], "tags"=>["epr", "spectra"], "article_id"=>161459, "categories"=>["Cancer", "Biochemistry", "Chemistry", "Pharmacology", "Plant Biology"], "users"=>["Jean de Dieu Tamokou", "Jean Rodolphe Chouna", "Eva Fischer-Fodor", "Gabriela Chereches", "Otilia Barbos", "Grigore Damian", "Daniela Benedec", "Mihaela Duma", "Alango Pépin Nkeng Efouet", "Hippolyte Kamdem Wabo", "Jules Roger Kuiate", "Augustin Mot", "Radu Silaghi-Dumitrescu"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0055880.g007", "stats"=>{"downloads"=>1, "page_views"=>7, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Cluster_tree_of_the_EPR_spectra_profiles_/161459", "title"=>"Cluster tree of the EPR spectra profiles.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2013-02-19 15:34:06"}
  • {"files"=>["https://ndownloader.figshare.com/files/491192"], "description"=>"<p><b>extract.</b> Sigmoidal dose-response curve corresponding to <i>Pentadesma butyracea</i> extract activity against four different cancer cell lines versus normal human lymphocytes.</p>", "links"=>[], "tags"=>["chemistry", "plant biology", "oncology", "pharmacology", "Biochemistry"], "article_id"=>161697, "categories"=>["Cancer", "Biochemistry", "Chemistry", "Pharmacology", "Plant Biology"], "users"=>["Jean de Dieu Tamokou", "Jean Rodolphe Chouna", "Eva Fischer-Fodor", "Gabriela Chereches", "Otilia Barbos", "Grigore Damian", "Daniela Benedec", "Mihaela Duma", "Alango Pépin Nkeng Efouet", "Hippolyte Kamdem Wabo", "Jules Roger Kuiate", "Augustin Mot", "Radu Silaghi-Dumitrescu"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0055880.g009", "stats"=>{"downloads"=>0, "page_views"=>1, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Dose_response_curve_for_Pentadesma_butyracea_/161697", "title"=>"Dose response curve for <i>Pentadesma butyracea</i>", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2013-02-19 15:35:25"}
  • {"files"=>["https://ndownloader.figshare.com/files/491609"], "description"=>"<p>For every cell line treated with the four active extracts, a number of 3×100 cells were evaluated microscopically. The distribution of apoptotic (colored in green due to the conjugation of PS with Annexin V-Alexa Fluor), necrotic (appears in red as a result of the intracellular PI coloration) and colorless intact viable cell percent is different for each compound. For every substance they are statistically significant differences between the activity against ovarian vs. epidermal cells (Two-way Anova and Bonferroni post-test in 95% confidence interval).</p>", "links"=>[], "tags"=>["induction", "extracts", "treated", "cancer"], "article_id"=>162111, "categories"=>["Cancer", "Biochemistry", "Chemistry", "Pharmacology", "Plant Biology"], "users"=>["Jean de Dieu Tamokou", "Jean Rodolphe Chouna", "Eva Fischer-Fodor", "Gabriela Chereches", "Otilia Barbos", "Grigore Damian", "Daniela Benedec", "Mihaela Duma", "Alango Pépin Nkeng Efouet", "Hippolyte Kamdem Wabo", "Jules Roger Kuiate", "Augustin Mot", "Radu Silaghi-Dumitrescu"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0055880.g012", "stats"=>{"downloads"=>0, "page_views"=>16, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Apoptosis_induction_capacity_of_the_natural_extracts_in_treated_cancer_cell_lines_/162111", "title"=>"Apoptosis induction capacity of the natural extracts in treated cancer cell lines.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2013-02-19 15:37:46"}

PMC Usage Stats | Further Information

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  • {"unique-ip"=>"38", "full-text"=>"44", "pdf"=>"8", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2019", "month"=>"10"}
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  • {"unique-ip"=>"38", "full-text"=>"40", "pdf"=>"12", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2020", "month"=>"6"}

Relative Metric

{"start_date"=>"2013-01-01T00:00:00Z", "end_date"=>"2013-12-31T00:00:00Z", "subject_areas"=>[{"subject_area"=>"/Biology and life sciences", "average_usage"=>[269, 466, 588, 697, 800, 896, 988, 1076, 1165, 1254, 1340, 1417]}, {"subject_area"=>"/Biology and life sciences/Anatomy", "average_usage"=>[248, 440, 562, 666, 765, 856, 944, 1028, 1112, 1198, 1282, 1362, 1430]}, {"subject_area"=>"/Biology and life sciences/Cell biology", "average_usage"=>[272, 472, 600, 713, 815, 911, 1004, 1094, 1185, 1273, 1358, 1441]}, {"subject_area"=>"/Medicine and health sciences/Anatomy", "average_usage"=>[248, 441, 564, 668, 769, 859, 948, 1034, 1117, 1202, 1290, 1368, 1437]}, {"subject_area"=>"/Medicine and health sciences/Nutrition", "average_usage"=>[273, 476, 611, 714, 821, 911, 1005, 1103, 1201, 1287, 1388, 1478, 1557]}, {"subject_area"=>"/Medicine and health sciences/Oncology", "average_usage"=>[249, 468, 599, 718, 820, 920, 1008, 1093, 1181, 1281, 1357, 1444, 1517]}, {"subject_area"=>"/Physical sciences", "average_usage"=>[254, 431, 547, 651, 748, 842, 932, 1017, 1098, 1178, 1259, 1336, 1404]}]}
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Net::HTTPTooManyRequests

Source
Scopus
Time
2019-08-27 20:09:33 UTC
Target URL
https://api.elsevier.com/content/search/index:SCOPUS?query=DOI(10.1371%2Fjournal.pone.0055880)
Trace

/app/models/concerns/networkable.rb:21:in `get_result'
/app/models/source.rb:165:in `get_data'
/app/models/retrieval_status.rb:47:in `perform_get_data'
/app/jobs/source_job.rb:52:in `block (2 levels) in perform'
/app/jobs/source_job.rb:51:in `block in perform'
/app/jobs/source_job.rb:35:in `each'
/app/jobs/source_job.rb:35:in `perform'