ABSTRACT
Después de las enfermedades cardiovasculares, el cáncer, una patología no transmisible, ha sido considerado como la segunda causa de muertes cada año a nivel global y como la barrera más importante para aumentar la esperanza de vida en el siglo 21. Se han alcanzado avances de gran relevancia en su prevención y tratamiento; sin embargo, existe aún un largo camino por recorrer para alcanzar un tratamiento efectivo para cada tipo de cáncer. En este trabajo se describen enfoques de reposicionamiento y síntesis de moléculas híbridas con potencial actividad antineoplásica. Para obtener el al-dehído intermediario clave, se empleó la metodología de oxidación de Dess-Martin, que fue acoplado con las cetonas correspondientes usando LDA; se generó así una mezcla racémica para cada uno de los compuestos híbridos propuestos. La actividad antiproliferativa in vitro de los compuestos finales se evaluó frente a ocho líneas celulares derivadas de tumores sólidos humanos, y cuatro líneas celulares no cancerosas. El compuesto 11d resulto ser el más efectivo y con mayor índice de seguridad. Los resultados sugirieron que estos compuestos podrían bloquear el ciclo celular e inducir la apop-tosis y la muerte en las células CCRF-CEM de forma dependiente de la dosis in vitro.
After cardiovascular diseases, cancer, a non-communicable pathology, has been considered the second cause of death each year globally and as the most important barrier to increasing life expectancy in the 21st century. Advances of great relevance have been made in its prevention and treatment, however, there is still a long way to go to achieve an effective treatment for each type of cancer. This paper describes approaches to reposition and synthesis of hybrid molecules with potential antineoplastic activity. To obtain the key intermediate aldehyde, the Dess-Martin oxidation methodology was used, which was coupled with the corresponding ketones using LDA. The final hybrid compounds were obtained as a racemic mixture. The in vitro antiproli-ferative activity of the final compounds was evaluated against eight cell lines derived from human solid tumors, and four non-cancerous cell lines. The compound 11d turned out to be the most effective and with the highest safety index. The results suggested that these compounds could block the cell cycle and induce apoptosis and death in CCRF-CEM cells in a dose-dependent manner in vitro.
Depois das doenças cardiovasculares, o câncer, uma patologia não transmissível, tem sido considerado como a segunda causa de mortes a cada ano em todo o mundo e como a barreira mais importante para o aumento da expectativa de vida no século 21. Avanços de grande relevância têm sido feitos na sua prevenção e tratamento, no entanto, ainda há um longo caminho a percorrer para alcançar um tratamento eficaz para cada tipo de câncer. Este artigo descreve abordagens para o reposicionamento e síntese de moléculas híbridas com potencial atividade antineoplásica. Para a obtenção do aldeído intermediário chave, foi utilizada a metodologia de oxidação de Dess-Martin, que foi acoplada com as cetonas correspondentes usando LDA. Os compostos híbridos finais foram obtidos como uma mistura racêmica. A atividade antiproliferativa in vitro dos compostos finais foi avaliada contra oito linhagens celulares derivadas de tumores sólidos humanos e quatro linhagens celulares não cancerosas. O composto 11d revelou-se o mais eficaz e com o maior índice de segurança. Os resultados sugeriram que estes compostos poderiam bloquear o ciclo celular e induzir apoptose e morte em células CCRF-CEM de forma dose-de-pendente in vitro.
ABSTRACT
Background and Objectives: Bupivacaine is available as a racemic mixture of dextro and levobupivacaine. Many studies show that dextrobupivacaine has greater cardiovascular and central nervous system toxicity than levobupiva-caine. The objectives of the present study were to compare the effects of racemic Bupivacaine + Fentanyl and Levo-bupivacaine + Fentanyl on the complete regression of motor block, onset time to reach T10level sensory block, dura-tion of T10level sensory block, onset time of motor block, duration of sensory block. Materials and Method: The study was conducted in 100 patients undergoing transurethral resection of prostate operation, who received either 1.75 ml Bupivacaine (0.5%) + 25 μg Fentanyl (Gr A) or 1.75 ml Levobupivacaine (0.5%) + 25 μg Fentanyl (Gr B) in-trathecally. Results: Time to complete regression of motor block, onset time toT10level sensory block were signifi-cantly prolonged in Gr A compared to Gr B. The onset time of motor block was significantly shorter in Gr A compared to Gr B. There was no statistically significant difference between the two groups in respect to the duration of T10level sensory block, duration of sensory block. Conclusion: Intrathecal Levobupivacaine + Fentanyl used in the present study can be considered as a suitable alternative to Bupivacaine + Fentanyl for spinal anaesthesia in elective TURP surgery