HSP90α plays an important role in piRNA biogenesis and retrotransposon repression in mouse

HSP90, found in all kingdoms of life, is a major chaperone protein regulating many client proteins. We demonstrated that HSP90α, one of two paralogs duplicated in vertebrates, plays an important role in the biogenesis of fetal PIWI-interacting RNAs (piRNA), which act against the transposon activities, in mouse male germ cells. The knockout mutation of Hsp90α resulted in a large reduction in the expression of primary and secondary piRNAs and mislocalization of MIWI2, a PIWI homolog. Whereas the mutation in Fkbp6 encoding a co-chaperone reduced piRNAs of 28–32 nucleotides in length, the Hsp90α mutation reduced piRNAs of 24–32 nucleotides, suggesting the presence of both FKBP6-dependent and -independent actions of HSP90α. Although DNA methylation and mRNA levels of L1 retrotransposon were largely unchanged in the Hsp90α mutant testes, the L1-encoded protein was increased, suggesting the presence of post-transcriptional regulation. This study revealed the specialized function of the HSP90α isofom in the piRNA biogenesis and repression of retrotransposons during the development of male germ cells in mammals

Retroperitoneal lipoma arising from the urinary bladder

Retroperitoneal benign lipomas are extremely rare and represent about 2.9% of all primary retroperitoneal tumors. About 80% of the tumors in the retroperitoneal cavities are malignant neoplasms. We experienced a case of a retroperitoneal lipoma simulating an ovarian mature cystic teratoma. A diagnosis was correctly made by magnetic resonance imaging (MRI) prior to surgery, and a total tumorectomy was performed. The retroperitoneal lipoma was recognized to have arisen from the urinary bladder. Histological sections revealed a tumor consisting of typical adipose cells without atypia. These types of lipomas should be carefully followed-up because they often recur and undergo malignant transformations

看護実践力育成のための発展型データベース・シミュレーション教材「Web 聖隷タウン」の開発 : 第1報

報告Reports　本稿は、保健師助産師看護師学校養成所指定規則の一部改正（2022 年４月１日施行）に伴う、本学看護学部のカリキュラム改革推進の一環として、2021 年度より検討が開始された看護実践力育成のための発展型データベース・シミュレーション教材「Web 聖隷タウン」の開発に関する第一報である。本学シミュレーション教育委員会は、「Web 聖隷タウン」の実用に向けた開発として、（１）地域の中の看護視点を育てるためのプロットの開発、（２）Web 聖隷タウン制作の技術的課題解決に向けた実用可能な制作環境の試用および検討を行っている。本稿では、「Web 聖隷タウン」の開発経緯と開発推進のための資源確保について、本教材の持つ機能、これまでの活動経過および今後の課題について報告する