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In vitro, in vivo and in silico analysis of the anticancer and estrogen-like activity of guava leaf extracts.

Abstract
Anticancer drug research based on natural compounds enabled the discovery of many drugs currently used in cancer therapy. Here, we report the in vitro, in vivo and in silico anticancer and estrogen-like activity of Psidium guajava L. (guava) extracts and enriched mixture containing the meroterpenes guajadial, psidial A and psiguadial A and B. All samples were evaluated in vitro for anticancer activity against nine human cancer lines: K562 (leukemia), MCF7 (breast), NCI/ADR-RES (resistant ovarian cancer), NCI-H460 (lung), UACC-62 (melanoma), PC-3 (prostate), HT-29 (colon), OVCAR-3 (ovarian) and 786-0 (kidney). Psidium guajava's active compounds displayed similar physicochemical properties to estradiol and tamoxifen, as in silico molecular docking studies demonstrated that they fit into the estrogen receptors (ERs). The meroterpene-enriched fraction was also evaluated in vivo in a Solid Ehrlich murine breast adenocarcinoma model, and showed to be highly effective in inhibiting tumor growth, also demonstrating uterus increase in comparison to negative controls. The ability of guajadial, psidial A and psiguadials A and B to reduce tumor growth and stimulate uterus proliferation, as well as their in silico docking similarity to tamoxifen, suggest that these compounds may act as Selective Estrogen Receptors Modulators (SERMs), therefore holding significant potential for anticancer therapy.
AuthorsL Y Rizzo, G B Longato, A Lt G Ruiz, S V Tinti, A Possenti, D B Vendramini-Costa, A Sartoratto, G M Figueira, F L N Silva, M N Eberlin, T A C B Souza, M T Murakami, E Rizzo, M A Foglio, F Kiessling, T Lammers, J E Carvalho
JournalCurrent medicinal chemistry (Curr Med Chem) Vol. 21 Issue 20 Pg. 2322-30 ( 2014) ISSN: 1875-533X [Electronic] Netherlands
PMID24438525 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
Chemical References
  • Antineoplastic Agents, Phytogenic
  • Estrogens
  • Plant Extracts
  • Selective Estrogen Receptor Modulators
Topics
  • Animals
  • Antineoplastic Agents, Phytogenic (pharmacology)
  • Cell Line, Tumor
  • Cell Proliferation (drug effects)
  • Computational Biology (methods)
  • Estrogens
  • Female
  • Humans
  • Mice, Inbred BALB C
  • Neoplasms (metabolism, pathology)
  • Plant Extracts (chemistry, pharmacology)
  • Plant Leaves (chemistry)
  • Psidium (chemistry)
  • Selective Estrogen Receptor Modulators (pharmacology)
  • Xenograft Model Antitumor Assays

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