The positive feedback loop FOXO3/CASC11/miR-498 promotes the tumorigenesis of non-small cell lung cancer
BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS
Authors: Yan, Ruicheng; Jiang, Ying; Lai, Bingyu; Lin, Yaqiong; Wen, Jingwei
Abstract
An increasing number of studies have indicated that long noncoding RNAs (IncRNAs) are involved in the regulation of non-small-cell lung cancer (NSCLC). Nevertheless, there are still numerous undiscovered mechanisms underlying this molecular regulation. Here, the results illustrated that CASC11 is overexpressed in NSCLC tumor tissues and cell lines, which is closely related to the clinical features of NSCLC and poor survival. In functional experiments, CASC11 was shown to promote proliferation and cycle progression and enhance NSCLC tumorigenesis. In mechanical investigations, CASC11 was shown to target the miR-498/FOX03 axis via a canonical competing endogenous RNA (ceRNA). In return, the transcription factor FOX03 targets the CASC11 promoter region, thereby accelerating its transcription. Our findings demonstrate a crucial role for CASC11 as an oncogene in promoting NSCLC. These results reveal that CASC11 might be a potential therapeutic target for NSCLC. (C) 2019 Published by Elsevier Inc.
FoxO Function Is Essential for Maintenance of Autophagic Flux and Neuronal Morphogenesis in Adult Neurogenesis
NEURON
Authors: Schaeffner, Iris; Minakaki, Georgia; Khan, M. Amir; Balta, Elli-Anna; Schloetzer-Schrehardt, Ursula; Schwarz, Tobias J.; Beckervordersandforth, Ruth; Winner, Beate; Webb, Ashley E.; DePinho, Ronald A.; Paik, Jihye; Wurst, Wolfgang; Klucken, Jochen; Lie, D. Chichung
Abstract
Autophagy is a conserved catabolic pathway with emerging functions in mammalian neurodevelopment and human neurodevelopmental diseases. The mechanisms controlling autophagy in neuronal development are not fully understood. Here, we found that conditional deletion of the Forkhead Box O transcription factors FoxO1, FoxO3, and FoxO4 strongly impaired autophagic flux in developing neurons of the adult mouse hippocampus. Moreover, FoxO deficiency led to altered dendritic morphology, increased spine density, and aberrant spine positioning in adult-generated neurons. Strikingly, pharmacological induction of autophagy was sufficient to correct abnormal dendrite and spine development of FoxO-deficient neurons. Collectively, these findings reveal a novel link between FoxO transcription factors, autophagic flux, and maturation of developing neurons.