Related Experiment Video
Updated: Aug 12, 2026

12:22
A Primary Neuron Culture System for the Study of Herpes Simplex Virus Latency and Reactivation
Published on: April 2, 2012
Prophylaxis against herpes labialis with acyclovir cream--a placebo-controlled study
Summary
Topical acyclovir cream significantly reduced cold sore outbreaks in patients with frequent herpes labialis recurrences. This antiviral treatment led to fewer disease days and fewer cold sore attacks compared to placebo.
Area of Science:
- Dermatology
- Virology
Background:
- Herpes labialis (cold sores) frequently recurs in some individuals.
- Recurrent herpes labialis significantly impacts quality of life.
Purpose of the Study:
- To evaluate the efficacy of topical acyclovir cream in managing frequent herpes labialis recurrences.
- To compare acyclovir cream versus placebo in reducing cold sore disease burden.
Main Methods:
- Randomized, double-blind, placebo-controlled, crossover study design.
- Patients applied acyclovir cream or placebo cream 4 times daily for 16 weeks.
- Follow-up observation period without treatment for 16 weeks post-treatment.
Main Results:
- Acyclovir cream treatment resulted in significantly fewer days of disease compared to placebo.
- Patients experienced significantly fewer cold sore attacks during acyclovir treatment versus placebo.
- Recurrences were observed during acyclovir treatment, but with reduced frequency and duration.
Conclusions:
- Topical acyclovir cream is an effective treatment for reducing the frequency and duration of herpes labialis recurrences.
- Acyclovir cream offers a beneficial therapeutic option for patients suffering from frequent cold sore outbreaks.
Related Concept Videos
DNA Base Pairing
Erwin Chargaff’s rules on DNA equivalence paved the way for the discovery of base pairing in DNA. Chargaff’s rules state that in a double-stranded DNA molecule,
Acne Infection
Acne is a multifactorial skin condition primarily affecting adolescents and young adults, with a global prevalence estimated to exceed 75% in this demographic. The condition is characterized by the formation of comedones (blackheads and whiteheads), papules, pustules, nodules, and, in severe cases, cysts, particularly in areas rich in sebaceous glands such as the face, neck, chest, and back. The pathogenesis involves increased sebum production, follicular hyperkeratinization, colonization by...
Herpes
Herpes simplex type 1 (HSV‑1) is a widespread pathogen responsible for orolabial lesions. It is an enveloped, double-stranded DNA (dsDNA) virus belonging to the family Herpesviridae. Once the virus infects a host cell, its double‑stranded DNA genome is delivered into the nucleus, where a coordinated cascade of immediate‑early, early, and late gene expression directs viral DNA replication, structural protein synthesis, and virion assembly. After primary infection of epithelial cells, HSV-1...
Chickenpox
Chickenpox is an acute, highly contagious disease caused by the varicella-zoster virus (VZV), a double-stranded DNA virus belonging to the Herpesviridae family. Its transmission occurs primarily through the inhalation of respiratory droplets or direct contact with vesicular fluid from skin lesions. The incubation period typically ranges from 10 to 21 days, during which the virus replicates and disseminates through sequential phases within the host. Although generally self-limiting in children,...
Genital Herpes
Genital herpes is a sexually transmitted infection primarily caused by herpes simplex virus type 2 (HSV-2), though herpes simplex virus type 1 (HSV-1) is increasingly implicated in genital infections, particularly among younger populations. Transmission occurs mainly through sexual contact, with asymptomatic viral shedding serving as a major route of spread. This characteristic makes HSV-2 difficult to control at a population level, as individuals may unknowingly transmit the virus even in the...
Antiviral Nucleoside Inhibitors
Antiviral Nucleoside InhibitorsAntiviral nucleoside inhibitors are structural analogs of natural nucleosides that interfere with viral DNA or RNA synthesis. These compounds selectively target viral polymerases due to their resemblance to host nucleosides, thereby disrupting viral genome replication.Mechanism of Acyclovir ActionAcyclovir is a guanosine analog with a three-carbon acyclic side chain. It selectively targets herpes simplex virus type 1 (HSV-1), herpes simplex virus type 2 (HSV-2),...

