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Absence of induction of enhanced reactivation of herpes simplex virus in cells from xeroderma pigmentosum patients without skin cancer. 1988

P J Abrahams, and A A van der Kleij, and R Schouten, and A J van der Eb
Laboratory for Molecular Carcinogenesis, Sylvius Laboratories, Leiden, The Netherlands.

The time course of appearance of enhanced reactivation (ER) and enhanced mutagenesis (EM) of herpes simplex virus type 1 were studied in UV-irradiated stationary cultures of xeroderma pigmentosum (XP) fibroblasts. In some of the XP cells EM followed similar kinetics of appearance as ER. Maximal activities occurred when infection was delayed 1 or 2 days after cell treatment. However, in certain XP cells only induction of the EM response was observed, whereas ER was absent. Interestingly, the latter XP cells had been obtained from patients who had not yet developed skin cancer at the time they were described in the literature, whereas the former XP patients had already developed skin tumors. This suggests that the ER response may somehow be involved in the process of oncogenic transformation. Dose-response studies of ER in XP cells from tumor-bearing patients showed that ER is maximally induced with a UV dose of 40 Jm-2 given to the virus. Normal levels of ER were observed in 14 different normal human skin fibroblasts, indicating that the ER- phenotype does not occur in normal cells or at least more rarely than in XP cells.

UI MeSH Term Description Entries
D007223 Infant A child between 1 and 23 months of age. Infants
D008297 Male Males
D009154 Mutation Any detectable and heritable change in the genetic material that causes a change in the GENOTYPE and which is transmitted to daughter cells and to succeeding generations. Mutations
D002478 Cells, Cultured Cells propagated in vitro in special media conducive to their growth. Cultured cells are used to study developmental, morphologic, metabolic, physiologic, and genetic processes, among others. Cultured Cells,Cell, Cultured,Cultured Cell
D002648 Child A person 6 to 12 years of age. An individual 2 to 5 years old is CHILD, PRESCHOOL. Children
D002675 Child, Preschool A child between the ages of 2 and 5. Children, Preschool,Preschool Child,Preschool Children
D004260 DNA Repair The removal of DNA LESIONS and/or restoration of intact DNA strands without BASE PAIR MISMATCHES, intrastrand or interstrand crosslinks, or discontinuities in the DNA sugar-phosphate backbones. DNA Damage Response
D004307 Dose-Response Relationship, Radiation The relationship between the dose of administered radiation and the response of the organism or tissue to the radiation. Dose Response Relationship, Radiation,Dose-Response Relationships, Radiation,Radiation Dose-Response Relationship,Radiation Dose-Response Relationships,Relationship, Radiation Dose-Response,Relationships, Radiation Dose-Response
D005260 Female Females
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man

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