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An example of such a gene product is the latency associated transcripts (LAT) in herpes simplex virus, which interfere with apoptosis by downregulating a number of host factors, including major histocompatibility complex (MHC) and inhibiting the apoptotic pathway. [17] A certain type of latency could be ascribed to the endogenous retroviruses.
Herpes simplex virions. Herpes simplex virus 1 and 2 (HSV 1 and HSV 2) are part of the alpha subfamily of herpesviruses. The lytic phase of infection occurs within mucoepithelial cells while the latent infection of these cells occurs in neurons. These two viruses are the cause of oral and genital herpes. [4]
Herpes simplex viruses can affect areas of skin exposed to contact with an infected person. An example of this is herpetic whitlow , which is a herpes infection on the fingers; it was commonly found on dental surgeon 's hands before the routine use of gloves when treating patients.
Site of Latency Means of Spread HHV‑1: Herpes simplex virus-1 (HSV-1) α (Alpha) Mucoepithelial: Oral and/or genital herpes, herpetic gingivostomatitis, pharyngitis, eczema herpeticum, herpetic whitlow, herpes simplex keratitis, erythema multiforme, encephalitis, as well as other herpes simplex infections: Neuron (sensory ganglia)
HHV Latency Associated Transcript (HHV LAT) is a length of RNA which accumulates in cells hosting long-term, or latent, Human Herpes Virus (HHV) infections. The LAT RNA is produced by genetic transcription from a certain region of the viral DNA .
Other betaherpesviruses establish latency as a nuclear episome, which is a circular DNA molecule (analogous to plasmids). For HHV-6, latency is believed to occur exclusively through the integration of viral telomeric repeats into human subtelomeric regions. [20]
There is a potential link between Alzheimer's disease and the herpes simplex virus-1 (HSV-1), which is a common cause for cold sores, a recent study suggests.
Herpes simplex, often known simply as herpes, is a viral infection caused by the herpes simplex virus. [5] Herpes infections are categorized by the area of the body that is infected. The two major types of herpes are oral herpes and genital herpes, though other forms also exist. Oral herpes involves the face or mouth.