Video Experimental Relacionado

Updated: Jun 13, 2026

Forward Genetics Screens Using Macrophages to Identify Toxoplasma gondii Genes Important for Resistance to IFN-γ-Dependent Cell Autonomous Immunity

Forward Genetics Screens Using Macrophages to Identify Toxoplasma gondii Genes Important for Resistance to IFN-γ-Dependent Cell Autonomous Immunity

Published on: March 12, 2015

Cribado y evaluación de aciertos de una biblioteca de metabolitos microbianos contra los parásitos patógenos

Maria R Gancheva¹, Emma Y Mao², Ornella Romeo³

¹Research Centre for Infectious Diseases, School of Biological Sciences, The University of Adelaide, Adelaide, 5005, South Australia, Australia; ARC Training Centre for Environmental and Agricultural Solutions to Antimicrobial Resistance (CEAStAR), St Lucia, 4072, Queensland, Australia; School of Animal and Veterinary Sciences, The University of Adelaide, Roseworthy, 5371, South Australia, Australia.

International journal for parasitology. Drugs and drug resistance

|August 21, 2025

Resumen

Los productos naturales ofrecen nuevas esperanzas contra la malaria resistente a los medicamentos y la toxoplasmosis. El cribado identificó compuestos potentes, con péptidos tiazol y pleuromutilinas que muestran promesa para el desarrollo de nuevos fármacos antiparasitarios.

Área de la Ciencia:

Microbiología y química de productos naturales
Parasitología y descubrimiento de fármacos
Química medicinal

Sus antecedentes:

La resistencia emergente a los antipalúdicos de primera línea y los tratamientos subóptimos para la toxoplasmosis requieren el desarrollo de nuevos medicamentos.
Los productos naturales, con su diversidad estructural, son una fuente valiosa para el descubrimiento de nuevos compuestos antiparasitarios.
Los parásitos apicomplejos como Plasmodium falciparum y Toxoplasma gondii plantean importantes desafíos para la salud mundial.

Objetivo del estudio:

Para examinar la biblioteca de las placas de descubrimiento de BioAustralis Serie I contra Plasmodium falciparum y Toxoplasma gondii.
Identificar nuevos productos naturales con actividad antiparasitaria y baja citotoxicidad en mamíferos.
Proporcionar puntos de partida para el desarrollo de nuevas terapias antiparasitarias.

Principales métodos:

Cribado de 812 productos naturales microbianos contra Plasmodium falciparum y Toxoplasma gondii.
Identificación de compuestos activos basados en la inhibición del crecimiento a 2 μg/mL.
Triaje para una baja citotoxicidad en mamíferos y determinación de la mitad de la concentración inhibidora máxima in vitro (CI50).

Principales resultados:

219 compuestos inhibieron el crecimiento de P. falciparum y 149 inhibieron el crecimiento de T. gondii.
Se identificaron más de 50 clases distintas de compuestos químicos entre los agentes activos.
Cuatro grupos de compuestos mostraron una baja actividad antiparasitaria nanomolar, con los péptidos tiazol y las pleuromutilinas exhibiendo perfiles de seguridad favorables.

Conclusiones:

Las placas BioAustralis Discovery Serie I contienen compuestos activos contra parásitos apicomplejos significativos.
Los péptidos tiazoles monocíclicos y las pleuromutilinas son candidatos prometedores para el desarrollo de fármacos antiparasitarios.
Este estudio proporciona herramientas valiosas para la investigación en biología de parásitos y el descubrimiento de nuevos fármacos antiparasitarios.

Palabras clave:

Descubrimiento de drogas El paludismo Productos naturales La toxoplasmosis

Más Videos Relacionados

Determination of Chemical Inhibitor Efficiency against Intracellular Toxoplasma Gondii Growth Using a Luciferase-Based Growth Assay

Determination of Chemical Inhibitor Efficiency against Intracellular Toxoplasma Gondii Growth Using a Luciferase-Based Growth Assay

Published on: April 29, 2020

Standard Membrane Feeding Assay for the Detection of Plasmodium falciparum Infection in Anopheles Mosquito Vectors

Standard Membrane Feeding Assay for the Detection of Plasmodium falciparum Infection in Anopheles Mosquito Vectors

Published on: May 12, 2022

Videos de Conceptos Relacionados

Microbial Interactions: Parasitism

Microbial Interactions: Parasitism

Parasitism is a form of microbial interaction in which parasitic microbes exploit a host organism for nutrients and shelter, often at the host's expense. Unlike mutualistic relationships, where both organisms benefit, parasitism benefits only the parasite and harms the host.Classification of ParasitesMicrobial parasites are broadly classified based on their location relative to the host.Ectoparasites remain on the host’s surface, such as the skin or outer tissues, drawing nutrients...

Malaria

Malaria

Malaria pathogenesis in humans reflects a delicate interplay between parasite biology and host response. Clinical illness reflects a host’s immune response to the parasite’s asexual replication cycle, which is often asymptomatic in individuals with partial immunity. From the parasite's perspective, transmission between mosquito and human with minimal host pathology is evolutionarily advantageous. Among the six Plasmodium species infecting humans, P. falciparum and P. vivax dominate in global...

Toxoplasmosis

Toxoplasmosis

Toxoplasmosis, a zoonotic disease caused by the protozoan Toxoplasma gondii, poses significant public health challenges globally due to its high seroprevalence and varied clinical manifestations. As an obligate intracellular parasite, T. gondii can infect all warm-blooded vertebrates, but felids are its only definitive hosts, shedding unsporulated oocysts into the environment. Humans typically acquire the infection through ingestion of tissue cysts in undercooked meat or oocysts from...

Giardiasis

Giardiasis

Giardiasis is a globally prevalent intestinal infection caused by the protozoan parasite Giardia duodenalis (also known as G. lamblia or G. intestinalis). This flagellated protozoan is the most frequently identified intestinal parasite in the United States and worldwide. Transmission primarily occurs via the fecal-oral route, with infection arising from ingestion of water or food contaminated with cysts. Individuals in low-resource settings, international travelers, outdoor enthusiasts, daycare...

Amebiasis

Amebiasis

Entamoeba histolytica, a protozoan parasite, is responsible for intestinal and extraintestinal amebiasis. Though a significant proportion of infections remain asymptomatic, approximately 50 million individuals annually are estimated to present with clinical disease, resulting in up to 100,000 deaths globally. The disease burden is disproportionately high in regions with lower socioeconomic status, such as parts of India, Africa, Mexico, and Latin America.Etiology and TransmissionThe infective...

Antiprotozoal Agents

Antiprotozoal Agents

Leishmaniasis is a widespread parasitic disease caused by several Leishmania species. It affects millions of people each year and remains a major public health problem in endemic regions. First-line treatment relies on pentavalent antimonials, including meglumine antimoniate and sodium stibogluconate. Even so, how these drugs work has not been fully clear, especially their interaction with parasite-specific biochemical pathways. One key target is trypanothione reductase (TR), an enzyme that...