Related Experiment Video
Updated: May 25, 2026
12:02
An Efficient Method for the Synthesis of Peptoids with Mixed Lysine-type/Arginine-type Monomers and Evaluation of Their Anti-leishmanial Activity
Published on: November 2, 2016
Lycorine derivatives against Trichomonas vaginalis
Raquel B Giordani1, Celso O R Junior, Jean P de Andrade
1Faculdade de Farmácia, Universidade Federal do Rio Grande do Sul, Av. Ipiranga 2752, 90610-000 Porto Alegre, RS, Brazil.
Chemical Biology & Drug Design
|January 21, 2012
Summary
New lycorine derivatives show potent anti-Trichomonas vaginalis activity. Esterification at the C-2 position with a lauroyl group yielded the most effective compound, suggesting novel therapeutic potential.
Area of Science:
- Medicinal Chemistry
- Parasitology
- Organic Synthesis
Background:
- Trichomonas vaginalis is a protozoan parasite causing significant human infections.
- Lycorine and its derivatives are natural products with diverse biological activities.
- Understanding structure-activity relationships is crucial for developing new antiparasitic agents.
Discussion:
- Six lycorine derivatives were synthesized and evaluated for in vitro anti-T. vaginalis activity.
- The study explored the impact of different acyl groups on antiparasitic efficacy.
- Structure-activity relationship analysis indicated that unprotected hydroxyl groups at C-1 and C-2 are not essential for activity.
Key Insights:
- Lycorine esterified with a lauroyl group at the C-2 position exhibited the highest anti-T. vaginalis activity.
- All synthesized derivatives demonstrated activity equal to or greater than the parent lycorine compound.
- The structural requirements for activity against T. vaginalis differ from those against mitochondriated cells.
Outlook:
- These findings offer a new perspective for optimizing the pharmacological potential of Amaryllidaceae alkaloids.
- Further research into the mechanism of action against T. vaginalis cell death is warranted.
- The developed derivatives represent promising leads for novel anti-Trichomonas vaginalis therapeutics.
Related Concept Videos
01:18Drugs Affecting GI Tract Motility: Antimicrobials as Antidiarrheal Agents
Acute diarrhea, a common gastrointestinal disturbance, is characterized by the rapid evacuation of fluid stools, leading to an excessive weight in fluid. This condition typically arises from disorders affecting intestinal water and electrolyte transport. It can be triggered by an increased osmotic load within the intestine, excessive secretion of electrolytes and water, mucosal exudation of protein and fluid, or altered intestinal motility. The primary risks of acute diarrhea are dehydration...
01:20Drugs Affecting GI Tract Motility: Adsorbents as Antidiarrheal Agents
Diarrhea is characterized by the occurrence of frequent, watery bowel movements. Various factors can trigger diarrhea, including viral or bacterial infections, foodborne illnesses, side effects from certain medications, and underlying digestive disorders. If not adequately managed, diarrhea can lead to complications such as dehydration, electrolyte imbalances, and nutrient deficiencies. Severe diarrhea can lead to significant weight loss, malnutrition, and weakened immune function.
Adsorbents...
Adsorbents...
01:15Anthelminthic Agents
Anthelmintic drugs differ significantly from antiparasitic therapies targeting protozoa, primarily due to differences in parasite biology. Whereas most protozoal treatments act on proliferating cells, anthelmintics are typically directed against mature, nonproliferative helminths. The therapeutic approach considers the helminth's reliance on neuromuscular coordination, glucose metabolism, and microtubular integrity for survival, reproduction, and localization within the host. Most anthelmintics...
01:28Inhibitors of Bacterial DNA Synthesis
Bacterial pathogens depend on precise and efficient DNA replication to sustain infection. Two type II topoisomerases—DNA gyrase and topoisomerase IV—are critical to this process, as they resolve DNA supercoiling and unlink chromosomes during replication. Fluoroquinolones, synthetic derivatives of quinolones, exploit this mechanism by stabilizing the transient DNA–enzyme cleavage complex, preventing strand religation, and causing lethal double-strand breaks. These antibiotics are selectively...
01:15Antifungal Agents
Amphotericin B is a broad-spectrum antifungal agent that exploits structural differences between fungal and mammalian cell membranes. Its amphipathic structure—featuring a hydrophobic polyene-lactone ring and a hydrophilic region containing mycosamine and carboxylic acid groups—enables selective binding to ergosterol, a sterol predominantly found in fungal plasma membranes. This selective interaction underlies the drug’s antifungal activity, although weak binding to cholesterol contributes to...
01:17Drugs for Treatment of Diarrhea-Predominant IBS
Diarrhea-predominant irritable bowel syndrome (IBS-D) is a subtype of IBS characterized primarily by frequent, loose, or watery stools, abdominal pain, and abdominal discomfort. Therapeutic approaches to managing IBS-D include dietary changes, stress management techniques, and pharmaceutical interventions.
Two specific drugs used in the treatment are alosetron (Lotronex) and eluxadoline (Viberzi). Alosetron, a 5-HT3 antagonist, works by slowing the movement of stools in the gut, reducing bowel...
Two specific drugs used in the treatment are alosetron (Lotronex) and eluxadoline (Viberzi). Alosetron, a 5-HT3 antagonist, works by slowing the movement of stools in the gut, reducing bowel...