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Biomedical subjects

W P Rowe

Publications and source records attributed to W P Rowe.

At least 145 records · Page 8Linked to original sources
PubMed1965

Studies of adenovirus SV40 hybrid viruses. I. Assay system and further evidence for hybridization.

The titers of adenovirus and SV40 genetic carriers in hybrid preparations (E46(+)) can be quantitated by determining the percentage of cells showing neoantigens stainable with fluorescent antibody (FA) at 21 to 24 hours; both titers can be obtained with a single coverslip. The adenovirus and SV40 antigen-inducing titers so obtained are of the same order of magnitude in stock preparations of E46(+) grown in either African green monkey kidney (AGMK) or human embryonic kidney tissue culture (HEK), and are generally within one log of the infectivity titer. Quantitative studies of 50 degrees C heat inactivation, ultracentrifugation, and equilibrium density gradient centrifugation of E46(+) gave no indication that SV40 neoantigen induction could be dissociated from adenovirus, whereas adenovirus and SV40 virus grown as a mixed infection were readily dissociated by these procedures. Pretreatment of HEK cells with a medium containing 5-fluorouracil desoxyriboside (FUDR) did not affect induction of either adenovirus or SV40 neoantigen or development of cytopathic effects after infection with E46(+), but did prevent formation of Ad. 7 viral antigen.

Adenoviridae↗
PubMed1965

Studies of adenovirus SV40 hybrid viruses. II. Defectiveness of the hybrid particles.

E46(+) virus purified by limiting dilution and plaque isolation in AGMK cells consists of a mixture of hybrid and non-hybrid virus particles. Of 102 plaque isolates obtained in HEK cells, 98 contained no detectable hybrid virus, while 4 contained a small proportion of hybrid virus. Plaque isolates from AGMK cells uniformly induced SV40 neoantigen, but when these plaque isolates were plaqued in HEK cells the progeny were again non-hybrid adenovirus. It thus appears impossible to obtain a pure line of hybrid virus. The proportion of hybrid virus produced in HEK cells fell progressively with decreasing multiplicity of infection, and plaque induction by E46(+) virus in AGMK followed 2-hit kinetics, indicating that the hybrid virus particles are defective and require dual infection with non-hybrid virus for their propagation.

Adenoviridae↗
PubMed1965

Lymphocytic-choriomeningitis virus in hamster tumor: spread to hamsters and humans.

A passage line of a spontaneous hamster fibrosarcoma is contaminated by the virus. of lymphocytic choriomeningitis. Tumors from animals receiving implants when newborn contain high titers of infectious lymphocytic-choriomeningitis virus and complement-fixing antigen, and hamsters receiving implants when weanlings develop high titers of complement-fixing antibody against lymphocytic-choriomeningitis virus. In contrast with the specific reactions of tumorous hamsters to the initiating virus in virus-induced tumors, the development of complement-fixing antibody to lymphocytic-choriomeningitis virus does not depend on the development of tumors. Infant hamsters bearing the tumor have a generalized subclinical infection and seem able to spread virus to other hamsters and to humans.

Animals↗