Familial multifocal micronodular pneumocyte hyperplasia with a novel splicing mutation in TSC1: Three cases in one family.
oleh: Tetsuaki Shoji, Satoshi Konno, Yo Niida, Takahiro Ogi, Masaru Suzuki, Kaoruko Shimizu, Yasuhiro Hida, Kichizo Kaga, Kuniaki Seyama, Tomoaki Naka, Yoshihiro Matsuno, Masaharu Nishimura
| Format: | Article |
|---|---|
| Diterbitkan: | Public Library of Science (PLoS) 2019-01-01 |
Deskripsi
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.