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Related Concept Videos

Trichomoniasis01:18

Trichomoniasis

Trichomonas vaginalis is a flagellated protozoan parasite and the causative agent of trichomoniasis, one of the most prevalent non-viral sexually transmitted infections in the United States. This extracellular parasite primarily colonizes the lower genitourinary tract in women—particularly the vagina—and in men, the urethra and prostate. Its structural and functional adaptations enable its survival, motility, and pathogenicity within the host environment.Structural Features and Host EntryT.
Anthelminthic Agents01:15

Anthelminthic 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...
Birth Control Methods01:22

Birth Control Methods

Vasectomy is a surgical form of male sterilization that involves severing and sealing the vasa deferentia, preventing sperm from mixing with semen during ejaculation. Because a vasectomy does not impact the testes' ability to produce testosterone, hormone levels, libido, and sexual function generally remain unchanged. While vasectomy is highly effective in preventing pregnancy, with a success rate near 99.85%, rare cases of recanalization (spontaneous reconnection) can occur. Although vasectomy...
Antiprotozoal Agents01:21

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...
Sexually Transmitted Infections01:26

Sexually Transmitted Infections

Sexually transmitted infections (STIs) are diseases transmitted primarily through unsafe sexual interactions. Bacteria, viruses, or parasites cause them and can result in severe health complications if untreated.ChlamydiaThe bacterium Chlamydia trachomatis is responsible for the disease Chlamydia, the most common STI in the United States. This peculiar pathogen requires human cells to reproduce, residing intracellularly. The initial infection often goes unnoticed because it typically does not...
Intrauterine Drug Delivery Systems01:21

Intrauterine Drug Delivery Systems

Controlled-release systems for intravaginal and intrauterine drug delivery have been developed primarily for the administration of contraceptive steroid hormones. These delivery routes circumvent first-pass hepatic metabolism, thereby enhancing bioavailability and allowing for reduced systemic dosages compared to oral administration. Such approaches contribute to improved therapeutic efficacy and patient compliance, particularly in long-term contraceptive regimens.Intravaginal Drug Delivery...

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Related Experiment Video

Updated: May 31, 2026

Modeling Healthy and Dysbiotic Vaginal Microenvironments in a Human Vagina-on-a-Chip
08:15

Modeling Healthy and Dysbiotic Vaginal Microenvironments in a Human Vagina-on-a-Chip

Published on: February 16, 2024

Novel trichomonacidal spermicides.

Ashish Jain1, Nand Lal, Lokesh Kumar

  • 1Division of Endocrinology, Central Drug Research Institute, Lucknow 226 001, India.

Antimicrobial Agents and Chemotherapy
|June 29, 2011
PubMed
Summary
This summary is machine-generated.

New dual-action molecules kill Trichomonas vaginalis, including resistant strains, and inactivate sperm without harming vaginal cells. These novel spermicidal antitrichomonas agents offer a safer alternative to existing treatments.

More Related Videos

Fluorimetric Techniques for the Assessment of Sperm Membranes
08:58

Fluorimetric Techniques for the Assessment of Sperm Membranes

Published on: November 28, 2018

Related Experiment Videos

Last Updated: May 31, 2026

Modeling Healthy and Dysbiotic Vaginal Microenvironments in a Human Vagina-on-a-Chip
08:15

Modeling Healthy and Dysbiotic Vaginal Microenvironments in a Human Vagina-on-a-Chip

Published on: February 16, 2024

Fluorimetric Techniques for the Assessment of Sperm Membranes
08:58

Fluorimetric Techniques for the Assessment of Sperm Membranes

Published on: November 28, 2018

Area of Science:

  • Reproductive biology
  • Microbiology
  • Medicinal chemistry

Background:

  • Metronidazole, a common trichomoniasis treatment, lacks spermicidal properties and faces rising drug resistance.
  • Nonoxynol-9 (N-9), a spermicide, offers no STI protection and may increase infection risk due to its surfactant nature.
  • There is a need for novel vaginal agents with dual spermicidal and antitrichomonas activity that are safe for vaginal microflora.

Purpose of the Study:

  • To design and evaluate novel nonsurfactant molecules with dual activity against Trichomonas vaginalis and human sperm.
  • To assess the safety profile of these compounds on human cervical epithelial cells and vaginal lactobacilli.
  • To investigate the structure-activity relationships and mechanism of action, focusing on thiol interactions.

Main Methods:

  • Design of molecules incorporating a carbodithioic acid pharmacophore to interact with free thiols.
  • In vitro testing of compound efficacy against metronidazole-susceptible and -resistant Trichomonas vaginalis strains.
  • Assessment of sperm inactivation, cytotoxicity to HeLa cells and lactobacilli, and inhibition of T. vaginalis cytoadherence.

Main Results:

  • Developed nonsurfactant molecules demonstrating potent in vitro activity against Trichomonas vaginalis and irreversible human sperm inactivation.
  • The most promising compound outperformed N-9 in sperm inactivation and metronidazole in killing T. vaginalis, including resistant strains.
  • Compounds showed reduced free thiols on sperm, inhibited T. vaginalis adherence to HeLa cells, and exhibited a favorable safety profile compared to N-9.

Conclusions:

  • Novel carbodithioic acid-based molecules offer a promising dual-action approach for spermicidal and antitrichomonas vaginal applications.
  • These agents present a potential safer alternative to N-9 and metronidazole, addressing unmet needs in vaginal health.
  • Further research into these compounds could lead to new strategies for preventing both unintended pregnancy and sexually transmitted infections.