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Carvalho C, Correia SC, Seiça R, Moreira PI. WWOX inhibition by Zfra1-31 restores mitochondrial homeostasis and viability of neuronal cells exposed to high glucose. Cell Mol Life Sci 2022; 79:487. [PMID: 35984507 PMCID: PMC11071800 DOI: 10.1007/s00018-022-04508-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Revised: 07/26/2022] [Accepted: 07/27/2022] [Indexed: 02/04/2023]
Abstract
Diabetes has been associated with an increased risk of cognitive decline and dementia. However, the mechanisms underlying this association remain unclear and no effective therapeutic interventions exist. Accumulating evidence demonstrates that mitochondrial defects are a key feature of diabetes contributing to neurodegenerative events. It has also been demonstrated that the putative tumor suppressor WW domain-containing oxidoreductase 1 (WWOX) can interact with mitochondria in several pathological conditions. However, its role in diabetes-associated neurodegeneration remains unknown. So, this study aimed to evaluate the role of WWOX activation in high glucose-induced neuronal damage and death. Our experiments were mainly performed in differentiated SH-SY5Y neuroblastoma cells exposed to high glucose and treated (or not) with Zfra1-31, the specific inhibitor of WWOX. Several parameters were analyzed namely cell viability, WWOX activation (tyrosine 33 residue phosphorylation), mitochondrial function, reactive oxygen species (ROS) production, biogenesis, and dynamics, autophagy and oxidative stress/damage. The levels of the neurotoxic proteins amyloid β (Aβ) and phosphorylated Tau (pTau) and of synaptic integrity markers were also evaluated. We observed that high glucose increased the levels of activated WWOX. Interestingly, brain cortical and hippocampal homogenates from young (6-month old) diabetic GK rats showed increased levels of activated WWOX compared to older GK rats (12-month old) suggesting that WWOX plays an early role in the diabetic brain. In neuronal cells, high glucose impaired mitochondrial respiration, dynamics and biogenesis, increased mitochondrial ROS production and decreased mitochondrial membrane potential and ATP production. More, high glucose augmented oxidative stress/damage and the levels of Aβ and pTau proteins and affected autophagy, contributing to the loss of synaptic integrity and cell death. Of note, the activation of WWOX preceded mitochondrial dysfunction and cell death. Importantly, the inhibition of WWOX with Zfra1-31 reversed, totally or partially, the alterations promoted by high glucose. Altogether our observations demonstrate that under high glucose conditions WWOX activation contributes to mitochondrial anomalies and neuronal damage and death, which suggests that WWOX is a potential therapeutic target for early interventions. Our findings also support the efficacy of Zfra1-31 in treating hyperglycemia/diabetes-associated neurodegeneration.
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Affiliation(s)
- Cristina Carvalho
- Center for Neuroscience and Cell Biology, University of Coimbra, 3004-504, Coimbra, Portugal.
- Center for Innovation in Biomedicine and Biotechnology (CIBB), Coimbra, Portugal.
- Institute for Interdisciplinary Research, University of Coimbra, Coimbra, Portugal.
| | - Sónia C Correia
- Center for Neuroscience and Cell Biology, University of Coimbra, 3004-504, Coimbra, Portugal
- Center for Innovation in Biomedicine and Biotechnology (CIBB), Coimbra, Portugal
- Institute for Interdisciplinary Research, University of Coimbra, Coimbra, Portugal
| | - Raquel Seiça
- Institute of Physiology, Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | - Paula I Moreira
- Center for Neuroscience and Cell Biology, University of Coimbra, 3004-504, Coimbra, Portugal.
- Center for Innovation in Biomedicine and Biotechnology (CIBB), Coimbra, Portugal.
- Institute of Physiology, Faculty of Medicine, University of Coimbra, Coimbra, Portugal.
- Laboratory of Physiology, Faculty of Medicine, University of Coimbra, 3000-354, Coimbra, Portugal.
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Zhang W, Wang B, Lin Y, Yang Y, Zhang Z, Wang Q, Zhang H, Jiang K, Ye Y, Wang S, Shen Z. hsa_circ_0000231 Promotes colorectal cancer cell growth through upregulation of CCND2 by IGF2BP3/miR-375 dual pathway. Cancer Cell Int 2022; 22:27. [PMID: 35033075 PMCID: PMC8760675 DOI: 10.1186/s12935-022-02455-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2021] [Accepted: 01/04/2022] [Indexed: 12/15/2022] Open
Abstract
Background Circular RNAs (circRNAs) have emerged as vital regulators of the initiation and progression of diverse kinds of human cancers. In this study, we explored the role of hsa_circ_0000231 and its downstream pathway in CRC. Methods The expression profile of circRNAs in 5 pairs of CRC tissues and adjacent normal tissues were analyzed by Microarray. Quantitative real-time PCR and in situ hybridization and Base Scope Assay were used to determine the level and prognostic values of hsa_circ_0000231. Then, functional experiments in vitro and in vivo were performed to investigate the effects of hsa_circ_0000231 on cell proliferation. Mechanistically, fluorescent in situ hybridization, dual luciferase reporter assay, RNA pull-down and RNA immunoprecipitation experiments were performed to confirm the interaction between hsa_circ_0000231 and IGF2BP3 or has_miR-375. Results We acquired data through circRNA microarray profiles, showing that the expression of hsa_circ_0000231 was upregulated in CRC primary tissues compared to adjacent normal tissues, which was indicated poor prognosis of patients with CRC. Functional analysis indicated that inhibition of hsa_circ_0000231 in CRC cell lines could suppress CRC cell proliferation as well as tumorigenesis in vitro and in vivo. The mechanistic analysis showed that hsa_circ_0000231 might, on the one hand, act as a competing endogenous RNA of miR-375 to promote cyclin D2 (CCND2) and, on the other hand, bind to the IGF2BP3 protein to prevent CCND2 degradation. Conclusions The findings suggested that hsa_circ_0000231 facilitated CRC progression by sponging miR-375 or binding to IGF2BP3 to modulate CCND2, implying that hsa_circ_0000231 might be a potential new diagnostic and therapeutic biomarker of CRC. Supplementary Information The online version contains supplementary material available at 10.1186/s12935-022-02455-8.
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Affiliation(s)
- Wei Zhang
- Department of Gastroenterological Surgery, Peking University People's Hospital, Beijing, 100044, People's Republic of China.,Laboratory of Surgical Oncology, Peking University People's Hospital, Beijing, 100044, People's Republic of China.,Beijing Key Laboratory of Colorectal Cancer Diagnosis and Treatment Research, Peking University People's Hospital, Xizhimen South Street, Xicheng, Beijing, 100044, People's Republic of China
| | - Bo Wang
- Department of Gastroenterological Surgery, Peking University People's Hospital, Beijing, 100044, People's Republic of China.,Beijing Key Laboratory of Colorectal Cancer Diagnosis and Treatment Research, Peking University People's Hospital, Xizhimen South Street, Xicheng, Beijing, 100044, People's Republic of China
| | - Yilin Lin
- Department of Gastroenterological Surgery, Peking University People's Hospital, Beijing, 100044, People's Republic of China.,Laboratory of Surgical Oncology, Peking University People's Hospital, Beijing, 100044, People's Republic of China.,Beijing Key Laboratory of Colorectal Cancer Diagnosis and Treatment Research, Peking University People's Hospital, Xizhimen South Street, Xicheng, Beijing, 100044, People's Republic of China
| | - Yang Yang
- Department of Gastroenterological Surgery, Peking University People's Hospital, Beijing, 100044, People's Republic of China.,Beijing Key Laboratory of Colorectal Cancer Diagnosis and Treatment Research, Peking University People's Hospital, Xizhimen South Street, Xicheng, Beijing, 100044, People's Republic of China
| | - Zhen Zhang
- Laboratory of Surgical Oncology, Peking University People's Hospital, Beijing, 100044, People's Republic of China.,Beijing Key Laboratory of Colorectal Cancer Diagnosis and Treatment Research, Peking University People's Hospital, Xizhimen South Street, Xicheng, Beijing, 100044, People's Republic of China
| | - Quan Wang
- Laboratory of Surgical Oncology, Peking University People's Hospital, Beijing, 100044, People's Republic of China.,Beijing Key Laboratory of Colorectal Cancer Diagnosis and Treatment Research, Peking University People's Hospital, Xizhimen South Street, Xicheng, Beijing, 100044, People's Republic of China
| | - Haoran Zhang
- Laboratory of Surgical Oncology, Peking University People's Hospital, Beijing, 100044, People's Republic of China.,Beijing Key Laboratory of Colorectal Cancer Diagnosis and Treatment Research, Peking University People's Hospital, Xizhimen South Street, Xicheng, Beijing, 100044, People's Republic of China
| | - Kewei Jiang
- Department of Gastroenterological Surgery, Peking University People's Hospital, Beijing, 100044, People's Republic of China
| | - Yingjiang Ye
- Department of Gastroenterological Surgery, Peking University People's Hospital, Beijing, 100044, People's Republic of China
| | - Shan Wang
- Laboratory of Surgical Oncology, Peking University People's Hospital, Beijing, 100044, People's Republic of China.,Beijing Key Laboratory of Colorectal Cancer Diagnosis and Treatment Research, Peking University People's Hospital, Xizhimen South Street, Xicheng, Beijing, 100044, People's Republic of China
| | - Zhanlong Shen
- Department of Gastroenterological Surgery, Peking University People's Hospital, Beijing, 100044, People's Republic of China. .,Laboratory of Surgical Oncology, Peking University People's Hospital, Beijing, 100044, People's Republic of China. .,Beijing Key Laboratory of Colorectal Cancer Diagnosis and Treatment Research, Peking University People's Hospital, Xizhimen South Street, Xicheng, Beijing, 100044, People's Republic of China.
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