title: Distribution, characterization and significance of polyomavirus genomic sequences in tumors of the brain and its covering.
abstract: The etiology of brain tumors and meningiomas is still unknown. Several factors have been considered, such as genetic predisposition and environmental risk factors, but the hypothesis that one or more infectious agents may play a role in tumor pathogenesis has also been investigated. Therefore, emphasis was placed on the neurooncogenic family Polyomaviridae and the presence of human polyomavirus DNA sequences and JCV mRNA were examined in malignant human brain biopsies. Italian patients affected with different types of neoplasias of the brain and its covering were enrolled. The patients underwent surgical tumor excision and the presence of the polyomavirus genome in biopsy and other body fluids was evaluated by PCR. In addition, the genomic organization of JCV was examined in depth, with the aim of providing information on genotype distribution and TCR rearrangements in the population affected with intracranial neoplasms. On the whole, polyomavirus DNA was found in 50% of the biopsy specimens studied, JC virus DNA and BK virus DNA were amplified in 40.6% mainly glioblastomas and 9.4% of the tissue specimens, respectively, while none of the biopsy specimens tested contained Simian virus 40 DNA. Genotype 1 and Mad 4 TCR organization were the most frequent in the population enrolled. Although a cause and effect was not demonstrated and the specific role of the viruses remains unknown, the findings appear to confirm the hypothesis that JCV and BKV could be important co-factors in tumor pathogenesis.
authors.affiliation: Laboratory of Molecular Biology and Biotechnology, Don Carlo Gnocchi Foundation, IRCCS, Milan, Italy.
authors.forename: Serena
authors.initials: S
authors.lastname: Delbue
authors.forename: Elisabetta
authors.initials: E
authors.lastname: Pagani
authors.forename: Franca R
authors.initials: FR
authors.lastname: Guerini
authors.forename: Cristina
authors.initials: C
authors.lastname: Agliardi
authors.forename: Roberta
authors.initials: R
authors.lastname: Mancuso
authors.forename: Elisa
authors.initials: E
authors.lastname: Borghi
authors.forename: Francesca
authors.initials: F
authors.lastname: Rossi
authors.forename: Renzo
authors.initials: R
authors.lastname: Boldorini
authors.forename: Claudia
authors.initials: C
authors.lastname: Veggiani
authors.forename: Pier Giorgio
authors.initials: PG
authors.lastname: Car
authors.forename: Pasquale
authors.initials: P
authors.lastname: Ferrante
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001739:BK Virus / Q000145:classification / Q000235:genetics / Q000302:isolation & purification*; D001706:Biopsy; D001932:Brain Neoplasms / Q000601:surgery / Q000821:virology*; D004279:DNA, Viral / Q000235:genetics / Q000302:isolation & purification; D005260:Female; D016679:Genome, Viral; D005838:Genotype; D006801:Humans; D007577:JC Virus / Q000145:classification / Q000235:genetics / Q000302:isolation & purification*; D008297:Male; D008579:Meningioma / Q000601:surgery / Q000821:virology*; D008875:Middle Aged; D027601:Polyomavirus Infections / Q000601:surgery / Q000821:virology; D012333:RNA, Messenger / Q000032:analysis; D020133:Reverse Transcriptase Polymerase Chain Reaction; D017422:Sequence Analysis, DNA; D014412:Tumor Virus Infections / Q000601:surgery / Q000821:virology
chemical_list: D004279:DNA, Viral; D012333:RNA, Messenger