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  • Book
    Takahiro Tabuchi.
    Summary: The main focus of this book is providing evidence on and interpreting the risks associated with heated tobacco products (HTPs) in terms of their health effects and social effects; in addition, the author introduces a harm reduction theory related to HTPs and electronic cigarettes. The book also addresses the history of these products, their marketing strategies, and policy implications. These products are new and the accompanying health risks have yet to be determined. However, since Japan accounts for more than 80% of the world's market for IQOS, the most popular heated tobacco product, researchers around the globe will be very interested in the outcomes. Written by a leading researcher in the field of tobacco control, Science and Practice for Heated Tobacco Products offers a valuable, unique resource for researchers in the fields of epidemiology, public health, social sciences, addiction, and tobacco research. Since tobacco is associated with a host of diseases including cancers, cardiovascular diseases, diabetes mellitus, and respiratory illnesses, researchers and healthcare workers whose work involves these diseases will find this book both thought provoking and insightful.

    Contents:
    1 Introduction
    2 Tobacco Products in Japan including a History of Heated Tobacco Products
    3 The JASTIS project: product use status in Japan
    4 Marketing Strategy for Tobacco Products in Japan
    5 Substances in Novel Tobacco Products
    6 Health effect
    7 Social Effect
    8 Interpretation of Risks of Novel Tobacco Products, including Harm Reduction Theory
    9 Suggestions for Practice regarding Novel Tobacco Product Use Patterns
    10 Policy implication including interference in tobacco control measures with new tobacco products
    11 Conclusions.
    Digital Access Springer 2021
  • Article
    Villani G, Boiteux S, Radman M.
    Proc Natl Acad Sci U S A. 1978 Jul;75(7):3037-41.
    The effect of UV irradiation on the extent and fidelity of DNA synthesis in vitro was studied by using homopolymers and primed single-stranded varphiX174 phage DNA as substrates. Unfractionated and fractionated cell-free extracts from Escherichia coli pol(+) and polA1 mutants as well as purified DNA polymerase I were used as sources of enzymatic activity. (DNA polymerases, as used here, refer to deoxynucleosidetriphosphate:DNA deoxynucleotidyltransferase, EC 2.7.7.7.) The extent of inhibition of DNA synthesis on UV-irradiated varphiX174 DNA suggested that pyrimidine dimers act as an absolute block for chain elongation by DNA polymerases I and III. Experiments with an irradiated poly(dC) template failed to detect incorporation of noncomplementary bases due to pyrimidine dimers. A large increase in the turnover of nucleoside triphosphates to free monophosphates during synthesis by DNA polymerase I on irradiated varphiX174 DNA has been observed. We propose that this nucleotide turnover is due to idling by DNA polymerase (i.e., incorporation and subsequent excision of nucleotides opposite UV photolesions, by the 3'-->5' "proofreading" exonuclease) thus preventing replication past pyrimidine dimers and the potentially mutagenic event that should result. In support of this hypothesis, DNA synthesis by DNA polymerase from avian myeloblastosis virus and by mammalian DNA polymerase alpha, both of which are devoid of any exonuclease activity, was found to be only partially inhibited, but not blocked, by UV irradiation of the template and accompanied by an increased incorporation of noncomplementary nucleotides. It is suggested that UV mutagenesis in bacteria requires an induced modification of the cellular DNA replication machinery, possibly an inhibition of the 3'-->5' exonuclease activity associated with DNA polymerases.
    Digital Access Access Options
  • Book
    Print v. 1-26, no. 1; 1925-Jan. 1964.