Synthesis of Novel Pyrene-Bearing C-Nucleoside and Its Incorporation into Oligonucleotides

Abstract

Phosphoramidite of (1,2,4-triazol-1-yl)-4-[(4-pyren-1-ylbutyl)amino]-5-(2-O-methyl-5-dimethoxytrityl-β-D-ribofuranosyl)pyrimidine has been synthesized, incorporated into polypyrimidine oligoaucleotides, and studied for thier triplex forming capacity.     

Serologic Relationship of Coxsackie A16 Viruses from the Epidemic of Hand-Foot-and-Mouth Disease in Japan, 1970, to the Prototype Strain

In 1970, a great outbreak of hand-foot-and-mouth disease (HFMD) due to Coxsackie A16 virus (Cox A16) occurred throughout Japan. When serologic relationship between the viruses isolated during the epidemic and the prototype strain of the serotype was examined by the tube neutralization test, the crude new isolates were found to be poorly neutralized by both an antiserum against the prototype strain and those against the isolates, although they were neutralized significantly in the plaque reduction test. However, about 2% of virus in crude suspensions of the isolates remained unneutralized even in the plaque reduction test and this fraction could be eliminated by filtering the virus materials through a 100 mμ Millipore filter. Therefore, the difficulty in neutralization of the isolates by the tube method could be accounted for by the presence of aggregated viruses. Even when filtered viruses were used, the reciprocal neutralization kinetic studies revealed a significant serological difference between the isolates and the prototype strain. Such serological properties of the isolates were not influenced by the cell types used for virus isolation or passages. All the results suggest that the Cox A16 isolates from the epidemic of HFMD in Japan, 1970, are serologically different from the prototype strain.     

Resistance of Staphylococcus aureus to Desiccasion,Heat and Ultraviolet Rays in Relation to Phage Pattern

Resistance of staphylococci to desiccation, dry heat, wet heat and ultraviolet irradiation was studied using 128 strains obtained from patients in our surgical clinics. Staphylococci of phage group I including type 81, particularly of type 80/81, showed significantly high death rates after desiccation, dry heating, and wet heating, and significantly low death rates after ultraviolet irradiation. In contrast, group-II strains responded inversely to these physical agents. The mean death rate of group-III strains approximated that of group I after desiccation, dry heating, and ultraviolet irradiation, but after wet heating it was lower than that of group II. The results indicate that transmissibility of staphylococci might be influenced to a great extent by physical factors in the environment outside the body.     

Mycoplasma genitalium and Mycoplasma pneumoniae share a 67 kilodalton protein as a main cross-reactive antigen

It was demonstrated that a 67 kilodalton (kDa) protein of Mycoplasma pneumoniae is a main cross-reactive antigen with similar molecular weight protein of Mycoplasma genitalium by Western blot analysis using monoclonal antibody to 67 kDa protein of M. pneumoniae and hyperimmune rabbit sera directed against each mycoplasma strain.