Familial multifocal micronodular pneumocyte hyperplasia with a novel splicing mutation in TSC1: Three cases in one family

Tetsuaki Shoji, Satoshi Konno, Yo Niida, Takahiro Ogi, Masaru Suzuki, Kaoruko Shimizu, Yasuhiro Hida, Kichizo Kaga, Kuniaki Seyama, Tomoaki Naka, Yoshihiro Matsuno, Masaharu Nishimura

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

Multifocal micronodular pneumocyte hyperplasia (MMPH) is a rare pulmonary disease, generally manifesting as a tuberous sclerosis complex (TSC), characterised by multiple, small ground-glass nodular shadows on chest computed tomography (CT). Histological examination typically reveals multicentric, well-demarcated, nodular type II pneumocystic growth. Herein, we describe three cases of this rare pulmonary disease occurring within one family. Using reverse transcription polymerase chain reaction (RT-PCR) and direct DNA sequencing, we identified a novel germline mutation, a point mutation in TSC1 intron 5, which yielded a splice variant and loss of function of TSC1. Furthermore, immunohistochemical staining indicated the expression of phospho-p70S6K and phospho-4E-BP1, suggesting that TSC1 function was impaired by the novel gene mutation in MMPH cells.

Original languageEnglish
Article numbere0212370
JournalPloS one
Volume14
Issue number2
DOIs
Publication statusPublished - 02-2019
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General

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