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Characterization of Novel Cutaneous Human Papillomavirus Genotypes HPV-150 and HPV-151
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Characterization of Novel Cutaneous Human Papillomavirus Genotypes HPV-150 and HPV-151
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Characterization of Novel Cutaneous Human Papillomavirus Genotypes HPV-150 and HPV-151
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Journal Article
Characterization of Novel Cutaneous Human Papillomavirus Genotypes HPV-150 and HPV-151
2011
Overview
DNA from two novel HPV genotypes, HPV-150 and HPV-151, isolated from hair follicles of immuno-competent individuals, was fully cloned, sequenced and characterized. The complete genomes of HPV-150 and HPV-151 are 7,436-bp and 7,386-bp in length, respectively. Both contain genes for at least six proteins, namely E6, E7, E1, E2, L2, L1, as well as a non-coding upstream regulatory region located between the L1 and E6 genes: spanning 416-bp in HPV-150 (genomic positions 7,371 to 350) and 322-bp in HPV-151 (genomic positions 7,213 to 148). HPV-150 and HPV-151 are phylogenetically placed within the Betapapillomavirus genus and are most closely related to HPV-96 and HPV-22, respectively. As in other members of this genus, the intergenic E2-L2 region is very short and does not encode for an E5 gene. Both genotypes contain typical zinc binding domains in their E6 and E7 proteins, but HPV-151 lacks the regular pRb-binding core sequence within its E7 protein. In order to assess the tissue predilection and clinical significance of the novel genotypes, quantitative type-specific real-time PCR assays were developed. The 95% detection limits of the HPV-150 and HPV-151 assays were 7.3 copies/reaction (range 5.6 to 11.4) and 3.4 copies/reaction (range 2.5 to 6.0), respectively. Testing of a representative collection of HPV-associated mucosal and cutaneous benign and malignant neoplasms and hair follicles (total of 540 samples) revealed that HPV-150 and HPV-151 are relatively rare genotypes with a cutaneous tropism. Both genotypes were found in sporadic cases of common warts and SCC and BCC of the skin as single or multiple infections usually with low viral loads. HPV-150 can establish persistent infection of hair follicles in immuno-competent individuals. A partial L1 sequence of a putative novel HPV genotype, related to HPV-150, was identified in a squamous cell carcinoma of the skin obtained from a 64-year old immuno-compromised male patient.
Publisher
Public Library of Science,Public Library of Science (PLoS)
Subject
/ Adult
/ Alphapapillomavirus - classification
/ Alphapapillomavirus - genetics
/ Alphapapillomavirus - physiology
/ Binding
/ Biology
/ Cloning
/ DNA
/ Female
/ Genes
/ Genomes
/ Genomics
/ Genotype
/ Hair
/ Humans
/ Male
/ Medicine
/ Melanoma
/ Mucosa
/ Proteins
/ Real-Time Polymerase Chain Reaction
/ Skin
/ Tropism
/ Tumors
/ Warts
/ Zinc
