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Paz E, Jain S, Gottfried I, Staretz-Chacham O, Mahajnah M, Bagchi P, Seyfried NT, Ashery U, Azem A. Biochemical and neurophysiological effects of deficiency of the mitochondrial import protein TIMM50. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.05.20.594480. [PMID: 38826427 PMCID: PMC11142075 DOI: 10.1101/2024.05.20.594480] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2024]
Abstract
TIMM50, an essential TIM23 complex subunit, is suggested to facilitate the import of ∼60% of the mitochondrial proteome. In this study, we characterized a TIMM50 disease causing mutation in human fibroblasts, and noted significant decreases in TIM23 core protein levels (TIMM50, TIMM17A/B, and TIMM23). Strikingly, TIMM50 deficiency had no impact on the steady state levels of most of its substrates, challenging the currently accepted import dogma of the essential general import role of TIM23 and suggesting that fully functioning TIM23 complex is not essential for maintaining the steady state level of the majority of mitochondrial proteins. As TIMM50 mutations have been linked to severe neurological phenotypes, we aimed to characterize TIMM50 defects in manipulated mammalian neurons. TIMM50 knockdown in mouse neurons had a minor effect on the steady state level of most of the mitochondrial proteome, supporting the results observed in patient fibroblasts. Amongst the few affected TIM23 substrates, a decrease in the steady state level of components of the intricate oxidative phosphorylation and mitochondrial ribosome complexes was evident. This led to declined respiration rates in fibroblasts and neurons, reduced cellular ATP levels and defective mitochondrial trafficking in neuronal processes, possibly contributing to the developmental defects observed in patients with TIMM50 disease. Finally, increased electrical activity was observed in TIMM50 deficient mice neuronal cells, which correlated with reduced levels of KCNJ10 and KCNA2 plasma membrane potassium channels, likely underlying the patients' epileptic phenotype.
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Zhang Q, Luo Y, Zhang S, Huang Q, Liu G. Development of a necroptosis-related prognostic model for uterine corpus endometrial carcinoma. Sci Rep 2024; 14:4257. [PMID: 38383747 PMCID: PMC10881509 DOI: 10.1038/s41598-024-54651-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Accepted: 02/15/2024] [Indexed: 02/23/2024] Open
Abstract
Necroptosis is a recently identified caspase-independent form of cell death which plays a significant role in the onset and progression of cancer. MicroRNAs (miRNAs) are vital for the development of uterine corpus endometrial carcinoma (UCEC) because they are an important regulatory component in necroptosis. This study developed a new necroptosis-related miRNAs profile to predict the prognosis of patients with UCEC. The TCGA-UCEC cohort's RNA sequencing data, consisting of 534 tumor samples and 33 normal samples, was downloaded. Ten differentially expressed miRNAs related to necroptosis were identified. A prediction model for necroptosis-related miRNAs was then created through COX regression and nomograms analysis. Clinical and pathological parameters were integrated to construct a nomogram and evaluate the model. Prognosis-related miRNAs were further used to predict target genes, and functional analysis was conducted to explore the potential mechanisms of these target genes. Subsequently, immune infiltration analysis was performed using transcriptome data to identify immune genes associated with prognosis, and the expression levels of target gene was validated using UCEC tissues. We identified 7 up-regulated miRNAs (hsa-miR-577, hsa-miR-7-5p, hsa-miR-210-3p, hsa-miR-210-5p, hsa-miR-200a-5p, hsa-miR-141-3p, hsa-miR-425-5p) and 3 down-regulated miRNAs (hsa-miR-7-2-3p, hsa-miR-383-5p, hsa-miR-29a-3p). The risk signature was based on univariate and multivariate COX analyses, constructed using 2 independent prognostic factors and miRNAs (hsa-miR-425-5p, hsa-miR-7-5p) associated with necroptosis. Nomograms demonstrated the prognostic value of risk level, age, FIGO stage, and histological type. Kaplan-Meier analysis revealed significant differences in overall survival (OS) outcomes associated with the expression of hsa-miR-425-5p (P < 0.001) and hsa-miR-7-5p (P = 0.015). Gene ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) investigations indicated that these miRNAs play crucial roles in tumor development, metastasis, and prognosis. Immune infiltration analysis showed decreased infiltration of CD8+ T cells, CD8+ T cells, NK cells, and M1 macrophages in normal tissues. Subsequently, a necroptosis-related immune gene significantly associated with prognosis (THRB) was identified, western blot and immunohistochemical staining confirmed the differential expression of THRB in normal endometrial tissues and tumor. Our findings demonstrate a close association between necroptosis and UCEC. The two necroptosis-related miRNAs used in this study may serve as valuable prognostic markers for UCEC patients, and are associated with immune cell infiltration. This suggests that necroptosis may be involved in the development of UCEC through its interaction with immune responses.
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Affiliation(s)
- Qi Zhang
- Department of General Surgery, Tianjin Medical University General Hospital, Tianjin, 300052, China
| | - Yongfu Luo
- Department of General Surgery, Tianjin Medical University General Hospital, Tianjin, 300052, China
- Department of General Surgery, Xintian People's Hospital, Xintian, 425700, Hunan, China
| | - Shiyao Zhang
- Department of General Surgery, Tianjin Medical University General Hospital, Tianjin, 300052, China
| | - Qianpeng Huang
- Department of General Surgery, Tianjin Medical University General Hospital, Tianjin, 300052, China
| | - Gang Liu
- Department of General Surgery, Tianjin Medical University General Hospital, Tianjin, 300052, China.
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Feng L, Zhang N, Luo L, Liu J, Yao Y, Gao MS, Pan J, He C. Investigation of the Proteasome 26S Subunit, ATPase Family Genes as Potential Prognostic Biomarkers and Therapeutic Targets for Hepatocellular Carcinoma. Cancer Manag Res 2024; 16:95-111. [PMID: 38370535 PMCID: PMC10874222 DOI: 10.2147/cmar.s449488] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Accepted: 02/09/2024] [Indexed: 02/20/2024] Open
Abstract
Background Several studies suggest that Proteasome 26S Subunit, ATPase (PSMC) family genes are of great importance in tumor progression and spreading, but the study for systematic evaluation of the function of PSMC genes in hepatocellular carcinoma (HCC) is currently lacking. Methods The functions of PSMC genes in HCC were analyzed using multiple online databases, including the TCGA database, GEO database, HPA database, cBioPortal database, DAVID, and KEGG pathway. Experiments were later conducted to verify PSMC expression. Results High levels of PSMC gene expression were detected in HCC tissues and PSMCs exhibited potentially powerful abilities in diagnosing HCC patients. All PSMC proteins are expressed to varying degrees in HCC tissues and high expression of the PSMC genes lead to poor prognosis in patients with HCC. Moreover, DNA methylation involves the regulation of the expression of PSMC2 and PSMC5 in HCC, and the levels of methylation of PSMC2 or PSMC5 correlate positively with patient overall survival in HCC patients. The copy number alteration and mutation of PSMC genes were observed and related to the expression of PSMCs in HCC. Functional enrichment analysis showed that many highly co-expressed genes of PSMCs had a potential role in tumor progression and metastasis, which merited further in-depth study. Functional network analysis also suggests that the primary biological function of PSMC genes is the regulation of protein homeostasis and energy metabolism in HCC. Moreover, the expression levels of PSMCs are related to immune cell infiltrates and immunomodulatory factors in HCC. Conclusion Our study indicates that PSMC genes are the potential target for precision immunotherapy and novel prognostic biomarkers for HCC.
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Affiliation(s)
- Lei Feng
- The Division of Gastroenterology and Hepatology, Suining Central Hospital, Suining City, Sichuan Province, People’s Republic of China
| | - Ning Zhang
- The Division of Gastroenterology and Hepatology, Suining Central Hospital, Suining City, Sichuan Province, People’s Republic of China
| | - Lan Luo
- The Division of Gastroenterology and Hepatology, Suining Central Hospital, Suining City, Sichuan Province, People’s Republic of China
| | - Jie Liu
- The Division of Gastroenterology and Hepatology, Suining Central Hospital, Suining City, Sichuan Province, People’s Republic of China
| | - Yong Yao
- The Division of Gastroenterology and Hepatology, Suining Central Hospital, Suining City, Sichuan Province, People’s Republic of China
| | - Ming-Sheng Gao
- The Division of Gastroenterology and Hepatology, Suining Central Hospital, Suining City, Sichuan Province, People’s Republic of China
| | - Jin Pan
- The Division of Gastroenterology and Hepatology, Suining Central Hospital, Suining City, Sichuan Province, People’s Republic of China
| | - Cai He
- The Division of Gastroenterology and Hepatology, Yibin Second People’s Hospital, Yibin City, Sichuan Province, People’s Republic of China
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Shi K, Shan Y, Sun X, Chen K, Luo Q, Xu Q. TP53INP2 modulates the malignant progression of colorectal cancer by reducing the inactive form of β-catenin. Biochem Biophys Res Commun 2024; 690:149275. [PMID: 37995453 DOI: 10.1016/j.bbrc.2023.149275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Accepted: 11/15/2023] [Indexed: 11/25/2023]
Abstract
TP53INP2 (tumor protein p53-inducible nuclear protein 2), known as an autophagy protein, is essential for regulating transcription and starvation-induced autophagy, which plays a crucial role in the oncogenesis and progression of various cancers. The present study aims to investigate the expression pattern, function and prognostic value of TP53INP2 in colorectal cancer (CRC). Here, we report that low expression of TP53INP2 correlates with poor survival in CRC patients. TP53INP2 was significantly downregulated in CRC tissues compared with adjacent tissues. As the malignancy of CRC progresses, the expression level of TP53INP2 gradually decreased. Knockdown of TP53INP2 promoted CRC cell proliferation and tumor growth in mice. Mechanistically, TP53INP2 deficiency decreased phosphorylation of β-catenin on S33, S37, and T41, resulting in increased accumulation of β-catenin and enhanced nuclear translocation and transcriptional activity. Moreover, we further demonstrated that TP53INP2 sequestered TIM50, thereby inhibiting its activation of β-catenin. Taken together, our findings indicate that the downregulation of TP53INP2 promotes CRC progression by activating β-catenin and suggest that TP53INP2 may be a candidate therapeutic target for CRC.
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Affiliation(s)
- Ke Shi
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, 163 Xianlin Avenue, Nanjing, 210023, China
| | - Yunlong Shan
- Key Laboratory of Drug Metabolism and Pharmacokinetics, State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, 210009, China
| | - Xiao Sun
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, 163 Xianlin Avenue, Nanjing, 210023, China
| | - Kuida Chen
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, 163 Xianlin Avenue, Nanjing, 210023, China
| | - Qiong Luo
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, 163 Xianlin Avenue, Nanjing, 210023, China.
| | - Qiang Xu
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, 163 Xianlin Avenue, Nanjing, 210023, China; Jiangsu Collaborative Innovation Center of Traditional Chinese Medicine in Prevention and Treatment of Tumor, Nanjing University of Chinese Medicine, Nanjing, China.
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Barba-Aliaga M, Bernal V, Rong C, Zid BM, Alepuz P. eIF5A controls mitoprotein import by relieving ribosome stalling at the TIM50 translocase mRNA. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.12.19.572290. [PMID: 38187585 PMCID: PMC10769225 DOI: 10.1101/2023.12.19.572290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2024]
Abstract
The efficient import of nuclear-encoded proteins into mitochondria is crucial for proper mitochondrial function. The conserved translation factor eIF5A is primarily known as an elongation factor which binds ribosomes to alleviate ribosome stalling at sequences encoding polyprolines or combinations of proline with glycine and charged amino acids. eIF5A is known to impact the mitochondrial function across a variety of species although the precise molecular mechanism underlying this impact remains unclear. We found that depletion of eIF5A in yeast drives reduced translation and levels of TCA cycle and oxidative phosphorylation proteins. We further found that loss of eIF5A leads to the accumulation of mitoprotein precursors in the cytosol as well as to the induction of a mitochondrial import stress response. Here we identify an essential polyproline-containing protein as a direct eIF5A target for translation: the mitochondrial inner membrane protein Tim50, which is the receptor subunit of the TIM23 translocase complex. We show how eIF5A directly controls mitochondrial protein import through the alleviation of ribosome stalling along TIM50 mRNA at the mitochondrial surface. Removal of the polyprolines from Tim50 rescues the mitochondrial import stress response, as well as the translation of oxidative phosphorylation reporter genes in an eIF5A loss of function. Overall, our findings elucidate how eIF5A impacts the mitochondrial function by reducing ribosome stalling and facilitating protein translation, thereby positively impacting the mitochondrial import process.
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Affiliation(s)
- Marina Barba-Aliaga
- Instituto de Biotecnología y Biomedicina (Biotecmed), Universitat de València, 46100 València, Spain
- Departamento de Bioquímica y Biología Molecular, Facultad de Ciencias Biológicas, Universitat de València, 46100 València, Spain
| | - Vanessa Bernal
- Instituto de Biotecnología y Biomedicina (Biotecmed), Universitat de València, 46100 València, Spain
- Departamento de Bioquímica y Biología Molecular, Facultad de Ciencias Biológicas, Universitat de València, 46100 València, Spain
| | - Cynthia Rong
- Department of Chemistry and Biochemistry, University of California San Diego, La Jolla, United States
| | - Brian M Zid
- Department of Chemistry and Biochemistry, University of California San Diego, La Jolla, United States
| | - Paula Alepuz
- Instituto de Biotecnología y Biomedicina (Biotecmed), Universitat de València, 46100 València, Spain
- Departamento de Bioquímica y Biología Molecular, Facultad de Ciencias Biológicas, Universitat de València, 46100 València, Spain
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Liu J, Luo B, Zhang P, Jiang K, Hou Z, Cao X, Tang J. Necroptosis-related LncRNAs in skin cutaneous melanoma: evaluating prognosis, predicting immunity, and guiding therapy. BMC Cancer 2023; 23:752. [PMID: 37580654 PMCID: PMC10424397 DOI: 10.1186/s12885-023-11246-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Accepted: 08/02/2023] [Indexed: 08/16/2023] Open
Abstract
BACKGROUND An increasing amount of research has speculated that necroptosis could be a therapeutic strategy for treating cancer. However, understanding the prognostic value of the necroptosis-related long non-coding RNAs (NRLs) in skin cutaneous melanoma (SKCM, hereafter referred to as melanoma) remains poor and needs to be developed. Our research aims to construct a model based on NRLs for the prognosis of patients with melanoma. METHODS We obtained the RNA-seq and clinical data from The Cancer Genome Atlas (TCGA) database and retrieved 86 necroptosis-related genes from the GeneCards database. The lncRNAs associated with necroptosis were identified via the Pearson correlation coefficient, and the prognostic model of melanoma was constructed using LASSO regression. Next, we employed multiple approaches to verify the accuracy of the model. Melanoma patients were categorized into two groups (high-risk and low-risk) according to the results of LASSO regression. The relationships between the risk score and survival status, clinicopathological correlation, functional enrichment, immune infiltration, somatic mutation, and drug sensitivity were further investigated. Finally, the functions of AL162457.2 on melanoma proliferation, invasion, and migration were validated by in vitro experiments. RESULTS The prognostic model consists of seven NRLs (EBLN3P, AC093010.2, LINC01871, IRF2-DT, AL162457.2, AC242842.1, HLA-DQB1-AS1) and shows high diagnostic efficiency. Overall survival in the high-risk group was significantly lower than in the low-risk group, and risk scores could be used to predict melanoma survival outcomes independently. Significant differences were evident between risk groups regarding the expression of immune checkpoint genes, immune infiltration, immunotherapeutic response and drug sensitivity analysis. A series of functional cell assays indicated that silencing AL162457.2 significantly inhibited cell proliferation, invasion, and migration in A375 cells. CONCLUSION Our prognostic model can independently predict the survival of melanoma patients while providing a basis for the subsequent investigation of necroptosis in melanoma and a new perspective on the clinical diagnosis and treatment of melanoma.
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Affiliation(s)
- Jianlan Liu
- Department of Orthopedics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Binlin Luo
- Department of Plastic and Burns Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Pengpeng Zhang
- Department of Thoracic Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Keyu Jiang
- Department of Plastic and Burns Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Zuoqiong Hou
- Department of Plastic and Burns Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Xiaojian Cao
- Department of Orthopedics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China.
| | - Jian Tang
- Department of Plastic and Burns Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China.
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Shi R, Li H, Wei S, Yu Z, Zhang J, Zhang Q, Zhou T, Yao Y, Zhang Q, Zhang T, Wang H. Lactate metabolism-related genes to predict the clinical outcome and molecular characteristics of endometrial cancer. BMC Cancer 2023; 23:491. [PMID: 37259038 DOI: 10.1186/s12885-023-10934-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Accepted: 05/09/2023] [Indexed: 06/02/2023] Open
Abstract
BACKGROUND Metabolic reprogramming is one of hallmarks of cancer progression and is of great importance for the tumor microenvironment (TME). As an abundant metabolite, lactate has been found to play a critical role in cancer development and immunosuppression of TME. However, the potential role of lactate metabolism-related genes in endometrial cancer (EC) remains obscure. METHODS RNA sequencing data and clinical information of EC were obtained from The Cancer Genome Atlas (TCGA) database. Lactate metabolism-related genes (LMRGs) WERE from Molecular Signature Database v7.4 and then compared the candidate genes from TCGA to obtain final genes. Univariate analysis and Least Absolute Shrinkage and Selection Operator (LASSO) Cox regression were performed to screen prognostic genes. A lactate metabolism-related risk profile was constructed using multivariate Cox regression analysis. The signature was validated by time-dependent ROC curve analysis and Kaplan-Meier analysis. The relationship between the risk score and age, grade, stage, tumor microenvironmental characteristics, and drug sensitivity was as well explored by correlation analyses. Gene ontology (GO) enrichment analysis and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway functional analysis between the high and low-risk groups were performed. CCK8, EdU, and clone formation assays were applied to detect the proliferation ability of EC cells, Transwell assay was performed to detect the migration ability of EC cells, and intracellular lactate and glucose content was used to asses lactate metabolism. RESULTS We constructed a risk signature based on 18 LMRGs. Kaplan-Meier curves confirmed that the high-risk group had poorer prognosis compared to the low-risk group. A nomogram was then constructed to predict the probability of EC survival. We also performed GO enrichment analysis and KEGG pathway functional analysis between the high and low-risk groups, and the outcome revealed that the features were significantly associated with energy metabolism. There was a significant correspondence between LMRGs and tumor mutational load, checkpoints and immune cell infiltration. C1, C2, and C4 were the most infiltrated in the high-risk group. The high-risk group showed increased dendritic cell activation, while the low-risk group showed increased plasma cells and Treg cells. Drug sensitivity analysis showed LMRGs risk was more resistant to Scr kinase inhibitors. We further proved that one of the lactate metabolism related genes, TIMM50 could promote EC cell proliferation, migration and lactate metabolism. CONCLUSION In conclusion, we have established an effective prognostic signature based on LMRG expression patterns, which may greatly facilitate the assessment of prognosis, molecular features and treatment modalities in EC patients and may be useful in the future translation to clinical applications. TIMM50 was identified as a novel molecule that mediates lactate metabolism in vitro and in vivo, maybe a promising target for EC prognosis.
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Affiliation(s)
- Rui Shi
- Department of Gynecology and Obstetrics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, People's Republic of China
| | - Haojia Li
- Department of Gynecology and Obstetrics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, People's Republic of China
| | - Sitian Wei
- Department of Gynecology and Obstetrics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, People's Republic of China
| | - Zhicheng Yu
- Department of Gynecology and Obstetrics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, People's Republic of China
| | - Jun Zhang
- Department of Gynecology and Obstetrics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, People's Republic of China
| | - Qi Zhang
- Department of Gynecology and Obstetrics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, People's Republic of China
| | - Ting Zhou
- Department of Gynecology and Obstetrics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, People's Republic of China
| | - Yuwei Yao
- Department of Gynecology and Obstetrics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, People's Republic of China
| | - Qian Zhang
- Department of Gynecology and Obstetrics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, People's Republic of China
| | - Tangansu Zhang
- Department of Gynecology and Obstetrics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, People's Republic of China
| | - Hongbo Wang
- Department of Gynecology and Obstetrics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, People's Republic of China.
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Liu Y, Chen Q, Zhu Y, Wang T, Ye L, Han L, Yao Z, Yang Z. Non-coding RNAs in necroptosis, pyroptosis and ferroptosis in cancer metastasis. Cell Death Discov 2021; 7:210. [PMID: 34381023 PMCID: PMC8358062 DOI: 10.1038/s41420-021-00596-9] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Revised: 07/07/2021] [Accepted: 07/22/2021] [Indexed: 02/07/2023] Open
Abstract
Distant metastasis is the main cause of death for cancer patients. Recently, the newly discovered programmed cell death includes necroptosis, pyroptosis, and ferroptosis, which possesses an important role in the process of tumor metastasis. At the same time, it is widely reported that non-coding RNA precisely regulates programmed death and tumor metastasis. In the present review, we summarize the function and role of necroptosis, pyrolysis, and ferroptosis involving in cancer metastasis, as well as the regulatory factors, including non-coding RNAs, of necroptosis, pyroptosis, and ferroptosis in the process of tumor metastasis.
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Affiliation(s)
- Yan Liu
- Bone and Soft Tissue Tumors Research Center of Yunnan Province, Department of Orthopaedics, The Third Affiliated Hospital of Kunming Medical University (Cancer Hospital of Yunnan Province), Kunming, Yunnan, China
| | - Qiuyun Chen
- Bone and Soft Tissue Tumors Research Center of Yunnan Province, Department of Orthopaedics, The Third Affiliated Hospital of Kunming Medical University (Cancer Hospital of Yunnan Province), Kunming, Yunnan, China
| | - Yanan Zhu
- Bone and Soft Tissue Tumors Research Center of Yunnan Province, Department of Orthopaedics, The Third Affiliated Hospital of Kunming Medical University (Cancer Hospital of Yunnan Province), Kunming, Yunnan, China
| | - Tiying Wang
- Bone and Soft Tissue Tumors Research Center of Yunnan Province, Department of Orthopaedics, The Third Affiliated Hospital of Kunming Medical University (Cancer Hospital of Yunnan Province), Kunming, Yunnan, China
| | - Lijuan Ye
- Department of Pathology, The Third Affiliated Hospital of Kunming Medical University (Cancer Hospital of Yunnan Province), Kunming, Yunnan, China
| | - Lei Han
- Bone and Soft Tissue Tumors Research Center of Yunnan Province, Department of Orthopaedics, The Third Affiliated Hospital of Kunming Medical University (Cancer Hospital of Yunnan Province), Kunming, Yunnan, China
| | - Zhihong Yao
- Bone and Soft Tissue Tumors Research Center of Yunnan Province, Department of Orthopaedics, The Third Affiliated Hospital of Kunming Medical University (Cancer Hospital of Yunnan Province), Kunming, Yunnan, China
| | - Zuozhang Yang
- Bone and Soft Tissue Tumors Research Center of Yunnan Province, Department of Orthopaedics, The Third Affiliated Hospital of Kunming Medical University (Cancer Hospital of Yunnan Province), Kunming, Yunnan, China.
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Chaudhuri M, Tripathi A, Gonzalez FS. Diverse Functions of Tim50, a Component of the Mitochondrial Inner Membrane Protein Translocase. Int J Mol Sci 2021; 22:7779. [PMID: 34360547 PMCID: PMC8346121 DOI: 10.3390/ijms22157779] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Revised: 07/14/2021] [Accepted: 07/16/2021] [Indexed: 12/17/2022] Open
Abstract
Mitochondria are essential in eukaryotes. Besides producing 80% of total cellular ATP, mitochondria are involved in various cellular functions such as apoptosis, inflammation, innate immunity, stress tolerance, and Ca2+ homeostasis. Mitochondria are also the site for many critical metabolic pathways and are integrated into the signaling network to maintain cellular homeostasis under stress. Mitochondria require hundreds of proteins to perform all these functions. Since the mitochondrial genome only encodes a handful of proteins, most mitochondrial proteins are imported from the cytosol via receptor/translocase complexes on the mitochondrial outer and inner membranes known as TOMs and TIMs. Many of the subunits of these protein complexes are essential for cell survival in model yeast and other unicellular eukaryotes. Defects in the mitochondrial import machineries are also associated with various metabolic, developmental, and neurodegenerative disorders in multicellular organisms. In addition to their canonical functions, these protein translocases also help maintain mitochondrial structure and dynamics, lipid metabolism, and stress response. This review focuses on the role of Tim50, the receptor component of one of the TIM complexes, in different cellular functions, with an emphasis on the Tim50 homologue in parasitic protozoan Trypanosoma brucei.
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Affiliation(s)
- Minu Chaudhuri
- Department of Microbiology, Immunology, and Physiology, Meharry Medical College, Nashville, TN 37208, USA; (A.T.); (F.S.G.)
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Callegari S, Cruz-Zaragoza LD, Rehling P. From TOM to the TIM23 complex - handing over of a precursor. Biol Chem 2021; 401:709-721. [PMID: 32074073 DOI: 10.1515/hsz-2020-0101] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2020] [Accepted: 02/13/2020] [Indexed: 12/31/2022]
Abstract
Mitochondrial precursor proteins with amino-terminal presequences are imported via the presequence pathway, utilizing the TIM23 complex for inner membrane translocation. Initially, the precursors pass the outer membrane through the TOM complex and are handed over to the TIM23 complex where they are sorted into the inner membrane or translocated into the matrix. This handover process depends on the receptor proteins at the inner membrane, Tim50 and Tim23, which are critical for efficient import. In this review, we summarize key findings that shaped the current concepts of protein translocation along the presequence import pathway, with a particular focus on the precursor handover process from TOM to the TIM23 complex. In addition, we discuss functions of the human TIM23 pathway and the recently uncovered pathogenic mutations in TIM50.
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Affiliation(s)
- Sylvie Callegari
- Department of Cellular Biochemistry, University Medical Center Göttingen, D-37073 Göttingen, Germany
| | - Luis Daniel Cruz-Zaragoza
- Department of Cellular Biochemistry, University Medical Center Göttingen, D-37073 Göttingen, Germany
| | - Peter Rehling
- Department of Cellular Biochemistry, University Medical Center Göttingen, D-37073 Göttingen, Germany.,Max Planck Institute for Biophysical Chemistry, D-37077 Göttingen, Germany
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Palmer CS, Anderson AJ, Stojanovski D. Mitochondrial protein import dysfunction: mitochondrial disease, neurodegenerative disease and cancer. FEBS Lett 2021; 595:1107-1131. [PMID: 33314127 DOI: 10.1002/1873-3468.14022] [Citation(s) in RCA: 47] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Revised: 10/12/2020] [Accepted: 10/17/2020] [Indexed: 12/13/2022]
Abstract
The majority of proteins localised to mitochondria are encoded by the nuclear genome, with approximately 1500 proteins imported into mammalian mitochondria. Dysfunction in this fundamental cellular process is linked to a variety of pathologies including neuropathies, cardiovascular disorders, myopathies, neurodegenerative diseases and cancer, demonstrating the importance of mitochondrial protein import machinery for cellular function. Correct import of proteins into mitochondria requires the co-ordinated activity of multimeric protein translocation and sorting machineries located in both the outer and inner mitochondrial membranes, directing the imported proteins to the destined mitochondrial compartment. This dynamic process maintains cellular homeostasis, and its dysregulation significantly affects cellular signalling pathways and metabolism. This review summarises current knowledge of the mammalian mitochondrial import machinery and the pathological consequences of mutation of its components. In addition, we will discuss the role of mitochondrial import in cancer, and our current understanding of the role of mitochondrial import in neurodegenerative diseases including Alzheimer's disease, Huntington's disease and Parkinson's disease.
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Affiliation(s)
- Catherine S Palmer
- Department of Biochemistry and Molecular Biology and The Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Australia
| | - Alexander J Anderson
- Department of Biochemistry and Molecular Biology and The Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Australia
| | - Diana Stojanovski
- Department of Biochemistry and Molecular Biology and The Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Australia
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12
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Zhang X, Han S, Zhou H, Cai L, Li J, Liu N, Liu Y, Wang L, Fan C, Li A, Miao Y. TIMM50 promotes tumor progression via ERK signaling and predicts poor prognosis of non-small cell lung cancer patients. Mol Carcinog 2019; 58:767-776. [PMID: 30604908 DOI: 10.1002/mc.22969] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2018] [Revised: 12/15/2018] [Accepted: 12/27/2018] [Indexed: 12/13/2022]
Abstract
TIMM50 (Translocase of the inner mitochondrial membrane 50), also called TIM50, plays an essential role in mitochondrial membrane transportation. The existing literature suggests that TIMM50 may perform as an oncogenetic protein in breast cancer. However, the molecular mechanism, especially in human non-small cell lung cancer (NSCLC), is uncertain to date. In the present study, using immunohistochemistry, we found that TIMM50 expression significantly correlated with larger tumor size (P = 0.049), advanced TNM stage (P = 0.001), positive regional lymph node metastasis (P = 0.007), and poor overall survival (P = 0.001). Proliferation and invasion assay showed that TIMM50 dramatically promoted the ability of proliferation and invasion of NSCLC cells. Subsequent Western blotting results revealed that TIMM50 enhanced the expression of Cyclin D1 and Snail, and inhibited the expression of E-cadherin. Moreover, TIMM50 facilitated the expression of phosphorylated ERK and P90RSK. Incorporation of ERK inhibitor counteracted the upregulating expression of CyclinD1, and Snail, and downregulating expression of E-cadherin expression induced by TIMM50 overexpression. In conclusion, our data indicated that TIMM50 facilitated tumor proliferation and invasion of NSCLC through enhancing phosphorylation of its downstream ERK/P90RSK signaling pathway. We speculated that TIMM50 might be a useful prognosis marker of NSCLC patients.
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Affiliation(s)
- Xiupeng Zhang
- Department of Pathology, College of Basic Medical Science and the First Affiliated Hospital of China Medical University, Shenyang, China
| | - Shuai Han
- Department of Neurosurgery, The First Hospital of China Medical University, Shenyang, China
| | - Haijing Zhou
- Department of Pathology, College of Basic Medical Science and the First Affiliated Hospital of China Medical University, Shenyang, China
| | - Lin Cai
- Department of Pathology, College of Basic Medical Science and the First Affiliated Hospital of China Medical University, Shenyang, China
| | - Jingduo Li
- Department of Pathology, College of Basic Medical Science and the First Affiliated Hospital of China Medical University, Shenyang, China
| | - Nan Liu
- Department of Pathology, College of Basic Medical Science and the First Affiliated Hospital of China Medical University, Shenyang, China
| | - Yang Liu
- Department of Pathology, College of Basic Medical Science and the First Affiliated Hospital of China Medical University, Shenyang, China
| | - Liang Wang
- Department of Pathology, College of Basic Medical Science and the First Affiliated Hospital of China Medical University, Shenyang, China
| | - Chuifeng Fan
- Department of Pathology, College of Basic Medical Science and the First Affiliated Hospital of China Medical University, Shenyang, China
| | - Ailin Li
- Department of Radiotherapy, The First Affiliated Hospital of China Medical University, Shenyang, China
| | - Yuan Miao
- Department of Pathology, College of Basic Medical Science and the First Affiliated Hospital of China Medical University, Shenyang, China
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13
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Reyes A, Melchionda L, Burlina A, Robinson AJ, Ghezzi D, Zeviani M. Mutations in TIMM50 compromise cell survival in OxPhos-dependent metabolic conditions. EMBO Mol Med 2018; 10:emmm.201708698. [PMID: 30190335 PMCID: PMC6180300 DOI: 10.15252/emmm.201708698] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
TIMM50 is an essential component of the TIM23 complex, the mitochondrial inner membrane machinery that imports cytosolic proteins containing a mitochondrial targeting presequence into the mitochondrial inner compartment. Whole exome sequencing (WES) identified compound heterozygous pathogenic mutations in TIMM50 in an infant patient with rapidly progressive, severe encephalopathy. Patient fibroblasts presented low levels of TIMM50 and other components of the TIM23 complex, lower mitochondrial membrane potential, and impaired TIM23-dependent protein import. As a consequence, steady-state levels of several components of mitochondrial respiratory chain were decreased, resulting in decreased respiration and increased ROS production. Growth of patient fibroblasts in galactose shifted energy production metabolism toward oxidative phosphorylation (OxPhos), producing an apparent improvement in most of the above features but also increased apoptosis. Complementation of patient fibroblasts with TIMM50 improved or restored these features to control levels. Moreover, RNASEH1 and ISCU mutant fibroblasts only shared a few of these features with TIMM50 mutant fibroblasts. Our results indicate that mutations in TIMM50 cause multiple mitochondrial bioenergetic dysfunction and that functional TIMM50 is essential for cell survival in OxPhos-dependent conditions.
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Affiliation(s)
- Aurelio Reyes
- MRC Mitochondrial Biology UnitUniversity of CambridgeCambridgeUK
| | - Laura Melchionda
- Unit of Molecular NeurogeneticsFoundation Carlo Besta Neurological Institute‐IRCCSMilanItaly
| | - Alberto Burlina
- Division of Inherited Metabolic DiseasesDepartment of PediatricsUniversity Hospital PadovaPadovaItaly
| | - Alan J Robinson
- MRC Mitochondrial Biology UnitUniversity of CambridgeCambridgeUK
| | - Daniele Ghezzi
- Unit of Molecular NeurogeneticsFoundation Carlo Besta Neurological Institute‐IRCCSMilanItaly
| | - Massimo Zeviani
- MRC Mitochondrial Biology UnitUniversity of CambridgeCambridgeUK
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14
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Zinc finger protein 746 promotes colorectal cancer progression via c-Myc stability mediated by glycogen synthase kinase 3β and F-box and WD repeat domain-containing 7. Oncogene 2018; 37:3715-3728. [DOI: 10.1038/s41388-018-0225-0] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Revised: 01/30/2018] [Accepted: 02/13/2018] [Indexed: 12/26/2022]
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15
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Dolcino M, Pelosi A, Fiore PF, Patuzzo G, Tinazzi E, Lunardi C, Puccetti A. Gene Profiling in Patients with Systemic Sclerosis Reveals the Presence of Oncogenic Gene Signatures. Front Immunol 2018; 9:449. [PMID: 29559981 PMCID: PMC5845728 DOI: 10.3389/fimmu.2018.00449] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2017] [Accepted: 02/20/2018] [Indexed: 12/11/2022] Open
Abstract
Systemic sclerosis (SSc) is a rare connective tissue disease characterized by three pathogenetic hallmarks: vasculopathy, dysregulation of the immune system, and fibrosis. A particular feature of SSc is the increased frequency of some types of malignancies, namely breast, lung, and hematological malignancies. Moreover, SSc may also be a paraneoplastic disease, again indicating a strong link between cancer and scleroderma. The reason of this association is still unknown; therefore, we aimed at investigating whether particular genetic or epigenetic factors may play a role in promoting cancer development in patients with SSc and whether some features are shared by the two conditions. We therefore performed a gene expression profiling of peripheral blood mononuclear cells (PBMCs) derived from patients with limited and diffuse SSc, showing that the various classes of genes potentially linked to the pathogenesis of SSc (such as apoptosis, endothelial cell activation, extracellular matrix remodeling, immune response, and inflammation) include genes that directly participate in the development of malignancies or that are involved in pathways known to be associated with carcinogenesis. The transcriptional analysis was then complemented by a complex network analysis of modulated genes which further confirmed the presence of signaling pathways associated with carcinogenesis. Since epigenetic mechanisms, such as microRNAs (miRNAs), are believed to play a central role in the pathogenesis of SSc, we also evaluated whether specific cancer-related miRNAs could be deregulated in the serum of SSc patients. We focused our attention on miRNAs already found upregulated in SSc such as miR-21-5p, miR-92a-3p, and on miR-155-5p, miR 126-3p and miR-16-5p known to be deregulated in malignancies associated to SSc, i.e., breast, lung, and hematological malignancies. miR-21-5p, miR-92a-3p, miR-155-5p, and miR-16-5p expression was significantly higher in SSc sera compared to healthy controls. Our findings indicate the presence of modulated genes and miRNAs that can play a predisposing role in the development of malignancies in SSc and are important for a better risk stratification of patients and for the identification of a better individualized precision medicine strategy.
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Affiliation(s)
- Marzia Dolcino
- Department of Medicine, University of Verona, Verona, Italy
| | - Andrea Pelosi
- Immunology Area, Pediatric Hospital Bambino Gesù, Rome, Italy
| | | | | | - Elisa Tinazzi
- Department of Medicine, University of Verona, Verona, Italy
| | | | - Antonio Puccetti
- Immunology Area, Pediatric Hospital Bambino Gesù, Rome, Italy.,Department of Experimental Medicine - Section of Histology, University of Genova, Genova, Italy
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16
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Kang Y, Fielden LF, Stojanovski D. Mitochondrial protein transport in health and disease. Semin Cell Dev Biol 2017; 76:142-153. [PMID: 28765093 DOI: 10.1016/j.semcdb.2017.07.028] [Citation(s) in RCA: 65] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2017] [Revised: 07/18/2017] [Accepted: 07/19/2017] [Indexed: 01/17/2023]
Abstract
Mitochondria are fundamental structures that fulfil important and diverse functions within cells, including cellular respiration and iron-sulfur cluster biogenesis. Mitochondrial function is reliant on the organelles proteome, which is maintained and adjusted depending on cellular requirements. The majority of mitochondrial proteins are encoded by nuclear genes and must be trafficked to, and imported into the organelle following synthesis in the cytosol. These nuclear-encoded mitochondrial precursors utilise dynamic and multimeric translocation machines to traverse the organelles membranes and be partitioned to the appropriate mitochondrial subcompartment. Yeast model systems have been instrumental in establishing the molecular basis of mitochondrial protein import machines and mechanisms, however unique players and mechanisms are apparent in higher eukaryotes. Here, we review our current knowledge on mitochondrial protein import in human cells and how dysfunction in these pathways can lead to disease.
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Affiliation(s)
- Yilin Kang
- Department of Biochemistry and Molecular Biology and The Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Parkville, Victoria, 3010, Australia
| | - Laura F Fielden
- Department of Biochemistry and Molecular Biology and The Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Parkville, Victoria, 3010, Australia
| | - Diana Stojanovski
- Department of Biochemistry and Molecular Biology and The Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Parkville, Victoria, 3010, Australia.
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17
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Huang Y, Guo XX, Han B, Zhang XM, An S, Zhang XY, Yang Y, Liu Y, Hao Q, Xu TR. Decoding the full picture of Raf1 function based on its interacting proteins. Oncotarget 2017; 8:68329-68337. [PMID: 28978120 PMCID: PMC5620260 DOI: 10.18632/oncotarget.19353] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2017] [Accepted: 06/18/2017] [Indexed: 01/10/2023] Open
Abstract
Raf1 is a member of the Raf kinase family and regulates many fundamental cell processes, including proliferation, differentiation, apoptosis, motility, and metabolism. However, the functions of Raf1 have not been completely elucidated. To better understand Raf1 function, we investigated the proteins that interacted with Raf1. We identified 198 Raf1 interacting proteins and our data suggested that Raf1 may regulate cell processes through these interactions. These interaction partners were involved in all ten hallmarks of cancer, suggesting that Raf1 is involved in different aspects of carcinogenesis. In addition, we showed that Raf1 interacting proteins were enriched in six signaling pathways and many human diseases. The interaction partners identified in this study may represent oncological candidates for future investigations into Raf1 function. Our findings have provided an overview of Raf1 function from a systems biology perspective.
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Affiliation(s)
- Ying Huang
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, China.,Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming, China
| | - Xiao-Xi Guo
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, China
| | - Bing Han
- Institute of Biomedical Sciences, Minhang Hospital, Fudan University, Shanghai, China
| | - Xu-Min Zhang
- State Key Laboratory of Genetic Engineering, Department of Biochemistry, School of Life Sciences, Fudan University, Shanghai, China
| | - Su An
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, China
| | - Xin-Yu Zhang
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, China
| | - Yang Yang
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, China
| | - Ying Liu
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, China
| | - Qian Hao
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, China
| | - Tian-Rui Xu
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, China
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18
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Abdel Malik R, Zippel N, Frömel T, Heidler J, Zukunft S, Walzog B, Ansari N, Pampaloni F, Wingert S, Rieger MA, Wittig I, Fisslthaler B, Fleming I. AMP-Activated Protein Kinase α2 in Neutrophils Regulates Vascular Repair via Hypoxia-Inducible Factor-1α and a Network of Proteins Affecting Metabolism and Apoptosis. Circ Res 2016; 120:99-109. [PMID: 27777247 PMCID: PMC5213742 DOI: 10.1161/circresaha.116.309937] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/09/2016] [Revised: 10/17/2016] [Accepted: 10/21/2016] [Indexed: 12/21/2022]
Abstract
RATIONALE The AMP-activated protein kinase (AMPK) is stimulated by hypoxia, and although the AMPKα1 catalytic subunit has been implicated in angiogenesis, little is known about the role played by the AMPKα2 subunit in vascular repair. OBJECTIVE To determine the role of the AMPKα2 subunit in vascular repair. METHODS AND RESULTS Recovery of blood flow after femoral artery ligation was impaired (>80%) in AMPKα2-/- versus wild-type mice, a phenotype reproduced in mice lacking AMPKα2 in myeloid cells (AMPKα2ΔMC). Three days after ligation, neutrophil infiltration into ischemic limbs of AMPKα2ΔMC mice was lower than that in wild-type mice despite being higher after 24 hours. Neutrophil survival in ischemic tissue is required to attract monocytes that contribute to the angiogenic response. Indeed, apoptosis was increased in hypoxic neutrophils from AMPKα2ΔMC mice, fewer monocytes were recruited, and gene array analysis revealed attenuated expression of proangiogenic proteins in ischemic AMPKα2ΔMC hindlimbs. Many angiogenic growth factors are regulated by hypoxia-inducible factor, and hypoxia-inducible factor-1α induction was attenuated in AMPKα2-deficient cells and accompanied by its enhanced hydroxylation. Also, fewer proteins were regulated by hypoxia in neutrophils from AMPKα2ΔMC mice. Mechanistically, isocitrate dehydrogenase expression and the production of α-ketoglutarate, which negatively regulate hypoxia-inducible factor-1α stability, were attenuated in neutrophils from wild-type mice but remained elevated in cells from AMPKα2ΔMC mice. CONCLUSIONS AMPKα2 regulates α-ketoglutarate generation, hypoxia-inducible factor-1α stability, and neutrophil survival, which in turn determine further myeloid cell recruitment and repair potential. The activation of AMPKα2 in neutrophils is a decisive event in the initiation of vascular repair after ischemia.
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Affiliation(s)
- Randa Abdel Malik
- From the Institute for Vascular Signaling, Centre for Molecular Medicine (R.A.M., N.Z., T.F., S.Z., B.F., I.F.), Functional Proteomics, SFB 815 Core Unit, Faculty of Medicine (J.H., I.W.), ECCPS Metabolomics Facility, Institute for Vascular Signaling, Centre for Molecular Medicine (S.Z.), Department of Hematology/Oncology (S.W., M.A.R.), and Buchmann Institute for Molecular Life Sciences (N.A., F.P.), Goethe University, Frankfurt am Main, Germany; German Center of Cardiovascular Research (DZHK), Partner site Rhein-Main, Frankfurt am Main, Germany (R.A.M., T.F., J.H., S.Z., B.F., I.F.); and Walter-Brendel-Centre of Experimental Medicine, Department of Cardiovascular Physiology and Pathophysiology, Ludwig Maximilians University, Munich, Germany (B.W.)
| | - Nina Zippel
- From the Institute for Vascular Signaling, Centre for Molecular Medicine (R.A.M., N.Z., T.F., S.Z., B.F., I.F.), Functional Proteomics, SFB 815 Core Unit, Faculty of Medicine (J.H., I.W.), ECCPS Metabolomics Facility, Institute for Vascular Signaling, Centre for Molecular Medicine (S.Z.), Department of Hematology/Oncology (S.W., M.A.R.), and Buchmann Institute for Molecular Life Sciences (N.A., F.P.), Goethe University, Frankfurt am Main, Germany; German Center of Cardiovascular Research (DZHK), Partner site Rhein-Main, Frankfurt am Main, Germany (R.A.M., T.F., J.H., S.Z., B.F., I.F.); and Walter-Brendel-Centre of Experimental Medicine, Department of Cardiovascular Physiology and Pathophysiology, Ludwig Maximilians University, Munich, Germany (B.W.)
| | - Timo Frömel
- From the Institute for Vascular Signaling, Centre for Molecular Medicine (R.A.M., N.Z., T.F., S.Z., B.F., I.F.), Functional Proteomics, SFB 815 Core Unit, Faculty of Medicine (J.H., I.W.), ECCPS Metabolomics Facility, Institute for Vascular Signaling, Centre for Molecular Medicine (S.Z.), Department of Hematology/Oncology (S.W., M.A.R.), and Buchmann Institute for Molecular Life Sciences (N.A., F.P.), Goethe University, Frankfurt am Main, Germany; German Center of Cardiovascular Research (DZHK), Partner site Rhein-Main, Frankfurt am Main, Germany (R.A.M., T.F., J.H., S.Z., B.F., I.F.); and Walter-Brendel-Centre of Experimental Medicine, Department of Cardiovascular Physiology and Pathophysiology, Ludwig Maximilians University, Munich, Germany (B.W.)
| | - Juliana Heidler
- From the Institute for Vascular Signaling, Centre for Molecular Medicine (R.A.M., N.Z., T.F., S.Z., B.F., I.F.), Functional Proteomics, SFB 815 Core Unit, Faculty of Medicine (J.H., I.W.), ECCPS Metabolomics Facility, Institute for Vascular Signaling, Centre for Molecular Medicine (S.Z.), Department of Hematology/Oncology (S.W., M.A.R.), and Buchmann Institute for Molecular Life Sciences (N.A., F.P.), Goethe University, Frankfurt am Main, Germany; German Center of Cardiovascular Research (DZHK), Partner site Rhein-Main, Frankfurt am Main, Germany (R.A.M., T.F., J.H., S.Z., B.F., I.F.); and Walter-Brendel-Centre of Experimental Medicine, Department of Cardiovascular Physiology and Pathophysiology, Ludwig Maximilians University, Munich, Germany (B.W.)
| | - Sven Zukunft
- From the Institute for Vascular Signaling, Centre for Molecular Medicine (R.A.M., N.Z., T.F., S.Z., B.F., I.F.), Functional Proteomics, SFB 815 Core Unit, Faculty of Medicine (J.H., I.W.), ECCPS Metabolomics Facility, Institute for Vascular Signaling, Centre for Molecular Medicine (S.Z.), Department of Hematology/Oncology (S.W., M.A.R.), and Buchmann Institute for Molecular Life Sciences (N.A., F.P.), Goethe University, Frankfurt am Main, Germany; German Center of Cardiovascular Research (DZHK), Partner site Rhein-Main, Frankfurt am Main, Germany (R.A.M., T.F., J.H., S.Z., B.F., I.F.); and Walter-Brendel-Centre of Experimental Medicine, Department of Cardiovascular Physiology and Pathophysiology, Ludwig Maximilians University, Munich, Germany (B.W.)
| | - Barbara Walzog
- From the Institute for Vascular Signaling, Centre for Molecular Medicine (R.A.M., N.Z., T.F., S.Z., B.F., I.F.), Functional Proteomics, SFB 815 Core Unit, Faculty of Medicine (J.H., I.W.), ECCPS Metabolomics Facility, Institute for Vascular Signaling, Centre for Molecular Medicine (S.Z.), Department of Hematology/Oncology (S.W., M.A.R.), and Buchmann Institute for Molecular Life Sciences (N.A., F.P.), Goethe University, Frankfurt am Main, Germany; German Center of Cardiovascular Research (DZHK), Partner site Rhein-Main, Frankfurt am Main, Germany (R.A.M., T.F., J.H., S.Z., B.F., I.F.); and Walter-Brendel-Centre of Experimental Medicine, Department of Cardiovascular Physiology and Pathophysiology, Ludwig Maximilians University, Munich, Germany (B.W.)
| | - Nariman Ansari
- From the Institute for Vascular Signaling, Centre for Molecular Medicine (R.A.M., N.Z., T.F., S.Z., B.F., I.F.), Functional Proteomics, SFB 815 Core Unit, Faculty of Medicine (J.H., I.W.), ECCPS Metabolomics Facility, Institute for Vascular Signaling, Centre for Molecular Medicine (S.Z.), Department of Hematology/Oncology (S.W., M.A.R.), and Buchmann Institute for Molecular Life Sciences (N.A., F.P.), Goethe University, Frankfurt am Main, Germany; German Center of Cardiovascular Research (DZHK), Partner site Rhein-Main, Frankfurt am Main, Germany (R.A.M., T.F., J.H., S.Z., B.F., I.F.); and Walter-Brendel-Centre of Experimental Medicine, Department of Cardiovascular Physiology and Pathophysiology, Ludwig Maximilians University, Munich, Germany (B.W.)
| | - Francesco Pampaloni
- From the Institute for Vascular Signaling, Centre for Molecular Medicine (R.A.M., N.Z., T.F., S.Z., B.F., I.F.), Functional Proteomics, SFB 815 Core Unit, Faculty of Medicine (J.H., I.W.), ECCPS Metabolomics Facility, Institute for Vascular Signaling, Centre for Molecular Medicine (S.Z.), Department of Hematology/Oncology (S.W., M.A.R.), and Buchmann Institute for Molecular Life Sciences (N.A., F.P.), Goethe University, Frankfurt am Main, Germany; German Center of Cardiovascular Research (DZHK), Partner site Rhein-Main, Frankfurt am Main, Germany (R.A.M., T.F., J.H., S.Z., B.F., I.F.); and Walter-Brendel-Centre of Experimental Medicine, Department of Cardiovascular Physiology and Pathophysiology, Ludwig Maximilians University, Munich, Germany (B.W.)
| | - Susanne Wingert
- From the Institute for Vascular Signaling, Centre for Molecular Medicine (R.A.M., N.Z., T.F., S.Z., B.F., I.F.), Functional Proteomics, SFB 815 Core Unit, Faculty of Medicine (J.H., I.W.), ECCPS Metabolomics Facility, Institute for Vascular Signaling, Centre for Molecular Medicine (S.Z.), Department of Hematology/Oncology (S.W., M.A.R.), and Buchmann Institute for Molecular Life Sciences (N.A., F.P.), Goethe University, Frankfurt am Main, Germany; German Center of Cardiovascular Research (DZHK), Partner site Rhein-Main, Frankfurt am Main, Germany (R.A.M., T.F., J.H., S.Z., B.F., I.F.); and Walter-Brendel-Centre of Experimental Medicine, Department of Cardiovascular Physiology and Pathophysiology, Ludwig Maximilians University, Munich, Germany (B.W.)
| | - Michael A Rieger
- From the Institute for Vascular Signaling, Centre for Molecular Medicine (R.A.M., N.Z., T.F., S.Z., B.F., I.F.), Functional Proteomics, SFB 815 Core Unit, Faculty of Medicine (J.H., I.W.), ECCPS Metabolomics Facility, Institute for Vascular Signaling, Centre for Molecular Medicine (S.Z.), Department of Hematology/Oncology (S.W., M.A.R.), and Buchmann Institute for Molecular Life Sciences (N.A., F.P.), Goethe University, Frankfurt am Main, Germany; German Center of Cardiovascular Research (DZHK), Partner site Rhein-Main, Frankfurt am Main, Germany (R.A.M., T.F., J.H., S.Z., B.F., I.F.); and Walter-Brendel-Centre of Experimental Medicine, Department of Cardiovascular Physiology and Pathophysiology, Ludwig Maximilians University, Munich, Germany (B.W.)
| | - Ilka Wittig
- From the Institute for Vascular Signaling, Centre for Molecular Medicine (R.A.M., N.Z., T.F., S.Z., B.F., I.F.), Functional Proteomics, SFB 815 Core Unit, Faculty of Medicine (J.H., I.W.), ECCPS Metabolomics Facility, Institute for Vascular Signaling, Centre for Molecular Medicine (S.Z.), Department of Hematology/Oncology (S.W., M.A.R.), and Buchmann Institute for Molecular Life Sciences (N.A., F.P.), Goethe University, Frankfurt am Main, Germany; German Center of Cardiovascular Research (DZHK), Partner site Rhein-Main, Frankfurt am Main, Germany (R.A.M., T.F., J.H., S.Z., B.F., I.F.); and Walter-Brendel-Centre of Experimental Medicine, Department of Cardiovascular Physiology and Pathophysiology, Ludwig Maximilians University, Munich, Germany (B.W.)
| | - Beate Fisslthaler
- From the Institute for Vascular Signaling, Centre for Molecular Medicine (R.A.M., N.Z., T.F., S.Z., B.F., I.F.), Functional Proteomics, SFB 815 Core Unit, Faculty of Medicine (J.H., I.W.), ECCPS Metabolomics Facility, Institute for Vascular Signaling, Centre for Molecular Medicine (S.Z.), Department of Hematology/Oncology (S.W., M.A.R.), and Buchmann Institute for Molecular Life Sciences (N.A., F.P.), Goethe University, Frankfurt am Main, Germany; German Center of Cardiovascular Research (DZHK), Partner site Rhein-Main, Frankfurt am Main, Germany (R.A.M., T.F., J.H., S.Z., B.F., I.F.); and Walter-Brendel-Centre of Experimental Medicine, Department of Cardiovascular Physiology and Pathophysiology, Ludwig Maximilians University, Munich, Germany (B.W.)
| | - Ingrid Fleming
- From the Institute for Vascular Signaling, Centre for Molecular Medicine (R.A.M., N.Z., T.F., S.Z., B.F., I.F.), Functional Proteomics, SFB 815 Core Unit, Faculty of Medicine (J.H., I.W.), ECCPS Metabolomics Facility, Institute for Vascular Signaling, Centre for Molecular Medicine (S.Z.), Department of Hematology/Oncology (S.W., M.A.R.), and Buchmann Institute for Molecular Life Sciences (N.A., F.P.), Goethe University, Frankfurt am Main, Germany; German Center of Cardiovascular Research (DZHK), Partner site Rhein-Main, Frankfurt am Main, Germany (R.A.M., T.F., J.H., S.Z., B.F., I.F.); and Walter-Brendel-Centre of Experimental Medicine, Department of Cardiovascular Physiology and Pathophysiology, Ludwig Maximilians University, Munich, Germany (B.W.).
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