Biological and Pharmaceutical Bulletin
The Pharmaceutical Society of Japan, established in 1880, is one of Japan’s oldest and most distinguished academic societies. The Society currently has around 18,000 members. It publishes three monthly scientific journals. Chemical and Pharmaceutical Bulletin (Chem. Pharm. Bull.) began publication in 1953 as Pharmaceutical Bulletin. It covers chemistry fields in the pharmaceutical and health sciences. Biological and Pharmaceutical Bulletin (Biol. Pharm. Bull.) began publication in 1978 as the Journal of Pharmacobio-Dynamics. It covers various biological topics in the pharmaceutical and health sciences. A fourth Society journal, the Journal of Health Science, was merged with Biol. Pharm. Bull. in 2012. Yakugaku Zasshi (Japanese for “Pharmaceutical Science Journal”) has the longest history, with publication beginning in 1881. Yakugaku Zasshi is published mostly in Japanese, except for some articles related to clinical pharmacy and pharmaceutical education, which are published in English.
The main aim of the Society’s journals is to advance the pharmaceutical sciences with research reports, information exchange, and high-quality discussion. The average review time for articles submitted to the journals is around one month for first decision. The complete texts of all of the Society’s journals can be freely accessed through J-STAGE. The Society’s editorial committee hopes that the content of its journals will be useful to your research, and also invites you to submit your own work to the journals.

Chairman of Committee
Ken-ichi Hosoya
Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama



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9,294 registered articles
(updated on November 22, 2017)
Online ISSN : 1347-5215
Print ISSN : 0918-6158
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Volume 40 (2017) Issue 11 Pages 1968-1975
The Truncated Isoform of the Receptor Tyrosine Kinase ALK Generated by Alternative Transcription Initiation (ALKATI) Induces Chromatin Structural Changes in the Nucleus in a Kinase Activity-Dependent Manner

Anaplastic lymphoma kinase (ALK) is a receptor-type tyrosine kinase that promotes cell growth upon stimulation with ligands such as midkine and pleiotrophin. Recently, a truncated isoform of ALK was identified in a variety of tumors. This isoform is expressed from a novel ALK transcript initiated from a de novo alternative transcription initiation (ATI) site in ALK intron 19 (referred to as ALKATI). ALKATI, which consists of only the intracellular kinase domain, localizes to the nucleus as well as the cytoplasm. However, its nuclear role is unknown. In this study, we determined that ALKATI promoted chromatin structural changes in the nucleus in a kinase activity-dependent manner. We found that expression of ALKATI increased the level of the heterochromatin marker Lys9 tri-methylated histone H3. In addition, we demonstrated that ALKATI phosphorylated the nuclear protein A-kinase anchoring protein 8 (AKAP8) and altered its subcellular localization from the insoluble fraction to the soluble fraction. These results suggest that ALKATI induces chromatin structural changes and heterochromatinization through phosphorylation of AKAP8 in the nucleus.

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Because tyrosine kinases mainly localize to the cytoplasm or the plasma membrane, most studies have focused on their roles in the cytoplasm. However, emerging evidence has revealed that tyrosine kinases also localize to the nucleus and regulate nuclear events, such as DNA damage responses, gene expression, and chromatin structural changes. In this paper, Takakura et al. showed that the truncated isoform of the receptor tyrosine kinase ALK (ALK <sup> ATI <sup> ), which only has the intracellular kinase domain, regulates chromatin structural changes, heterochromatinization, and gene expression in the nucleus. This paper is the first report shedding light on the nuclear roles of ALK.





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