1. Interaction of a Novel Alternatively Spliced Variant of HSD11B1L with Parkin Enhances the Carcinogenesis Potential of Glioblastoma: Peiminine Interferes with This Interaction.
- Author
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Fu RH, Hong SY, Tsai CW, Liu SP, Chiu SC, Wu MZ, Shyu WC, and Lin SZ
- Subjects
- Animals, Humans, Mice, Carcinogenesis genetics, Cevanes pharmacology, Protein Isoforms drug effects, Protein Isoforms genetics, Protein Isoforms metabolism, 11-beta-Hydroxysteroid Dehydrogenase Type 1 drug effects, 11-beta-Hydroxysteroid Dehydrogenase Type 1 genetics, 11-beta-Hydroxysteroid Dehydrogenase Type 1 metabolism, Brain Neoplasms drug therapy, Brain Neoplasms genetics, Brain Neoplasms metabolism, Glioblastoma drug therapy, Glioblastoma genetics, Glioblastoma metabolism, Ubiquitin-Protein Ligases drug effects, Ubiquitin-Protein Ligases genetics, Ubiquitin-Protein Ligases metabolism
- Abstract
Glioblastoma (GBM) is a primary brain tumor of unknown etiology. It is extremely aggressive, incurable and has a short average survival time for patients. Therefore, understanding the precise molecular mechanisms of this diseases is essential to establish effective treatments. In this study, we cloned and sequenced a splice variant of the hydroxysteroid 11-β dehydrogenase 1 like gene ( HSD11B1L ) and named it HSD11B1L-181. HSD11 B1L-181 was specifically expressed only in GBM cells. Overexpression of this variant can significantly promote the proliferation, migration and invasion of GBM cells. Knockdown of HSD11B1L-181 expression inhibited the oncogenic potential of GBM cells. Furthermore, we identified the direct interaction of parkin with HSD11B1L-181 by screening the GBM cDNA expression library via yeast two-hybrid. Parkin is an RBR E3 ubiquitin ligase whose mutations are associated with tumorigenesis. Small interfering RNA treatment of parkin enhanced the proliferative, migratory and invasive abilities of GBM. Finally, we found that the alkaloid peiminine from the bulbs of Fritillaria thunbergii Miq blocks the interaction between HSD11B1L-181 and parkin, thereby lessening carcinogenesis of GBM. We further confirmed the potential of peiminine to prevent GBM in cellular, ectopic and orthotopic xenograft mouse models. Taken together, these findings not only provide insight into GBM, but also present an opportunity for future GBM treatment.
- Published
- 2023
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