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  • Open Access


    Repellent and Insecticidal Activity of Naphthoquinones from the Heartwood of Tectona grandis on Incisitermes marginipennis (Latreille)

    Crisanto Velázquez-Becerra1,*, Gu Yen Ambriz-Ortiz1, Rafael Torres-Martínez2, Mauro Manuel Martínez-Pacheco3

    Phyton-International Journal of Experimental Botany, Vol.92, No.7, pp. 2165-2181, 2023, DOI:10.32604/phyton.2023.026954

    Abstract Wood is a lignocellulosic material that, because of its organic nature, is a source of nutrients for bacteria, fungi, and insects. Incisitermes marginipennis (Latreille) is an interesting dry wood-boring termite. Because it is an extremely destructive pest, difficult to control due to its cryptic lifestyle, and for its role in the biogeochemical cycle of carbon and other elements; it is a fundamental organism. The use of less toxic and eco-friendly substances is important for protecting domestic, cultural, and historical heritage made of wood or lignocellulosic materials. The aim of this study was to evaluate the biological activity of various naphthoquinones… More >

  • Open Access


    Use of the Naphthoquinone YM155 (Sepantronium Bromide) in the Treatment of Cancer: A Systematic Review and Meta-Synthesis

    Dariimaa Ganbat1,2, Bat-Erdene Jugder3, Lkhamaa Ganbat4, Miki Tomoeda5, Erdenetsogt Dungubat2,6, Ambaga Miyegombo7, Gantsetseg Garmaa8, Yoshihisa Takahashi6, Ryuji Fukuzawa6, Ichiro Mori6, Takayuki Shiomi6, Akinori Nakata9, Yasuhiko Tomita6,*

    Oncologie, Vol.24, No.2, pp. 195-225, 2022, DOI:10.32604/oncologie.2022.022299

    Abstract Most cancer cells overexpress the anti-apoptotic protein survivin and display redox dysregulation originating from genotypic and phenotypic alterations. These disturbances contribute to the uncontrolled proliferation, invasion, and chemoresistance of cancer cells, yet they also represent a specific vulnerability that could be exploited therapeutically in selected tumors. YM155 (sepantronium bromide) is a naphthoquinone-containing imidazolebased compound that selectively inhibits survivin expression at the transcriptional and post-transcriptional levels. Here, we performed a systematic review and meta-analysis of clinical studies in which YM155 was administered as monotherapy or combination therapy for patients with cancer. We assessed fully or partially reported clinical outcomes and pharmacological… More >

  • Open Access


    Antifungal Activity of Crude Extracts of Tectona grandis L.f. against Wood Decay Fungi

    Enrique Cárcamo-Ibarra1, Mauro Manuel Martínez-Pacheco2, Abril Munro-Rojas1, Jorge Enrique Ambriz-Parra1, Crisanto Velázquez-Becerra1,*

    Phyton-International Journal of Experimental Botany, Vol.91, No.8, pp. 1795-1808, 2022, DOI:10.32604/phyton.2022.020578

    Abstract Wood is mainly made up of cellulose, hemicelluloses, lignin polymers and other organic and inorganic substances, making it susceptible to deteriorate by various biological agents. Tectona grandis L.f. (Teak) is a timber species with high resistance to biological deterioration, valued for its durability, beauty, and mechanical resistance. The purpose of this work was to evaluate the antifungal activity of crude extracts from teak on various fungi that cause wood deterioration. For this, Teak heartwood was obtained, then fragmented and pulverized until obtaining a flour which was used for compounds extraction using the Soxhlet technique coupled to a rotary evaporator through… More >

  • Open Access


    Apoptogenic effect of the lipophilic o-naphthoquinone CG 10-248 on rat hepatocytes: light and electron microscopy studies

    Lidia M. Lopez*, Marta Dubin**, Patricia H. Carrizo**, Mario H. Burgos***, Amanda Pellegrino De Iraldi*, Andrés O. M. Stoppani**

    BIOCELL, Vol.27, No.2, pp. 213-224, 2003, DOI:10.32604/biocell.2003.27.213

    Abstract CG 10-248 (3,4-dihydro-2,2-dimethyl-9-chloro-2H-naphtho[1,2b]pyran- 5,6-dione; CG-NQ), a β-lapachone analogue, modified the ultrastructure of rat hepatocytes, as demonstrated by light and electron microscopy. After 4 h incubation with 100 µM CG-NQ, the following effects were observed: (a) nuclear chromatin condensation; (b) chromatin fragmentation; (c) displacement of mitochondria, concentrated around the nucleus; (d) disruption or expansion of mitochondrial outer or inner membranes, respectively; (e) displacement and alteration of endoplasmic reticulum (rough and smooth); (f) decrease of microvilli; (g) blebbing of plasma membrane and production of apoptotic bodies formed by folding of plasma membrane fragments around mitochondria or peroxysomes; and (h) production of hydrogen… More >

  • Open Access


    Effect of the Lipophilic o-Naphthoquinone CG 10-248 on Rat Liver Mitochondria Structure and Function


    BIOCELL, Vol.26, No.2, pp. 237-245, 2002, DOI:10.32604/biocell.2002.26.237

    Abstract CG 10-248 (3,4-dihydro-2,2 dimethyl-9-chloro-2H-naphtho[1,2b]pyran-5,6-dione), a ß-lapachone analogue, modified the ultrastructure of rat liver mitochondria in vitro, in the absence of added oxidizable substrates. The condensed mitochondrial state was replaced by the orthodox or swollen state to a significant degree. The number of modified mitochondria depended on incubation time and quinone concentration, in the 25-100 µM range. Under the same experimental conditions, mitochondrial respiration was uncoupled as indicated by the increase in the rate of succinate oxidation by controlled mitochondria in metabolic state “4” (not in state “3”), and by the activation of latent F0 F1 -ATP synthase. Taking into account… More >

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