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Cell line–dependent cytotoxicity and selective phenolic handling of Lamium spp. extracts in human cancer cell models
Citotoxicidad dependiente de la línea celular y manejo selectivo de compuestos fenólicos de extractos de Lamium spp. en modelos de células cancerosas humanas
Citotoxicidade dependente da linhagem celular e manipulação seletiva de compostos fenólicos de extratos de Lamium spp. em modelos de células cancerígenas humanas
DOI:
https://doi.org/10.15446/rcciquifa.v55n3.127104Palabras clave:
Lamium spp, cytotoxicity, phenolic compounds (en)Lamium spp, citotoxicidad, compuestos fenólicos (es)
Lamium spp., citotoxicidad, compuestos fenólicos (pt)
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Introduction: Plant extracts are widely investigated as sources of cytostatic bioactive compounds. Previous studies have reported cytotoxic activity of several Lamium species in vitro. However, comparative data across species and cell lines remain scarce, and the role of phenolic compounds in this activity is still poorly understood. Objective: Hydroalcoholic extracts of L. album, L. purpureum, L. maculatum, and L. galeobdolon were tested against A549 (lung adenocarcinoma), BJ-hTERT (immortalized human foreskin fibroblasts), HeLa (human cervical carcinoma), HROG04 (human glioblastoma), MeWo (human melanoma), NIH:OVCAR-3 (human ovarian adenocarcinoma), PC-3 (prostate adenocarcinoma), ZR-75 (human breast adenocarcinoma) cell lines. Methodology: Cytotoxic activity was evaluated using the MTT assay, and changes in phenolic composition were analyzed by HPLC-DAD. Results: all investigated extracts exhibited the lowest IC₅₀ values against NIH:OVCAR-3, HROG04, and ZR-75 cells (<375 µg/mL), with a selectivity index relative to BJ-hTERT cells exceeding 4 for all extracts. HPLC-DAD revealed changes in extracellular phenolic concentrations, including the appearance of new peaks and the disappearance of others. BJ-hTERT cells showed less marked alterations in the medium composition. Conclusion: Lamium spp. extracts exhibit selective cytotoxicity toward specific cancer cell lines, possibly associated with dynamic changes in extracellular phenolic compounds.
Introducción: Los extractos vegetales son ampliamente estudiados como fuentes de compuestos bioactivos con actividad citostática. Estudios previos han reportado actividad citotóxica de varias especies del género Lamium in vitro; sin embargo, los datos comparativos entre especies y líneas celulares siguen siendo escasos, y el papel de los compuestos fenólicos en esta actividad aún no está completamente esclarecido. Objetivo: Se evaluaron extractos hidroalcohólicos de L. album, L. purpureum, L. maculatum y L. galeobdolon frente a las líneas celulares A549 (adenocarcinoma pulmonar), BJ-hTERT (fibroblastos humanos de prepucio inmortalizados), HeLa (carcinoma cervical humano), HROG04 (glioblastoma humano), MeWo (melanoma humano), NIH:OVCAR-3 (adenocarcinoma ovárico humano), PC-3 (adenocarcinoma prostático) y ZR-75 (adenocarcinoma mamario humano). Metodología: La actividad citotóxica se evaluó mediante el ensayo MTT, y los cambios en la composición fenólica se analizaron mediante HPLC-DAD. Resultados: Todos los extractos investigados presentaron los valores más bajos de IC₅₀ en las líneas NIH:OVCAR-3, HROG04 y ZR-75 (<375 µg/mL), con un índice de selectividad superior a 4 respecto a las células BJ-hTERT. El análisis mediante HPLC-DAD reveló cambios en las concentraciones de compuestos fenólicos extracelulares, incluyendo la aparición de nuevos picos y la desaparición de otros. En las células BJ-hTERT se observaron alteraciones menos marcadas en la composición del medio. Conclusión: Los extractos de Lamium spp. presentan citotoxicidad selectiva frente a determinadas líneas celulares cancerosas, posiblemente asociada a cambios dinámicos en los compuestos fenólicos extracelulares.
Introdução: Extratos de plantas são amplamente investigados como fontes de compostos bioativos citostáticos. Estudos anteriores relataram atividade citotóxica de diversas espécies de Lamium in vitro. No entanto, dados comparativos entre espécies e linhagens celulares ainda são escassos, e o papel dos compostos fenólicos nessa atividade ainda é pouco compreendido. Objetivo: Extratos hidroalcoólicos de L. album, L. purpureum, L. maculatum e L. galeobdolon foram testados contra as linhagens celulares A549 (adenocarcinoma de pulmão), BJ-hTERT (fibroblastos imortalizados de prepúcio humano), HeLa (carcinoma cervical humano), HROG04 (glioblastoma humano), MeWo (melanoma humano), NIH:OVCAR-3 (adenocarcinoma ovariano humano), PC-3 (adenocarcinoma de próstata) e ZR-75 (adenocarcinoma de mama humano). Metodologia: A atividade citotóxica foi avaliada pelo ensaio MTT e as alterações na composição fenólica foram analisadas por HPLC-DAD. Resultados: todos os extratos investigados apresentaram os menores valores de IC₅₀ contra as células NIH:OVCAR-3, HROG04 e ZR-75 (<375 µg/mL), com um índice de seletividade em relação às células BJ-hTERT superior a 4 para todos os extratos. A HPLC-DAD revelou alterações nas concentrações de fenólicos extracelulares, incluindo o aparecimento de novos picos e o desaparecimento de outros. As células BJ-hTERT apresentaram alterações menos acentuadas na composição do meio. Conclusão: Os extratos de Lamium spp. exibem citotoxicidade seletiva contra linhagens celulares cancerígenas específicas, possivelmente associada a alterações dinâmicas nos compostos fenólicos extracelulares.
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