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Jing T, Wang B, Yang Z, Liu Y, Xu G, Xu X, Jiao K, Chen Z, Xiang L, Zhang L, Liu Y. Deubiquitination of the repressor E2F6 by USP22 facilitates AKT activation and tumor growth in hepatocellular carcinoma. Cancer Lett 2021; 518:266-277. [PMID: 34339800 DOI: 10.1016/j.canlet.2021.07.044] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2021] [Revised: 07/16/2021] [Accepted: 07/28/2021] [Indexed: 01/20/2023]
Abstract
Dysregulated ubiquitination of tumor-related proteins plays a critical role in tumor development and progression. The deubiquitinase USP22 is aberrantly expressed in certain types of cancer and contributes to aggressive tumor progression. However, the precise mechanism underlying the pro-tumorigenic function of USP22 in hepatocellular carcinoma (HCC) remains unclear. Here, we report that E2F6, a pocket protein-independent transcription repressor, is essential for HCC cell growth, and that its activities are controlled by USP22-mediated deubiquitination. USP22 interacts with and stabilizes E2F6, resulting in the transcriptional repression of phosphatase DUSP1. Moreover, the process involving DUSP1 repression by E2F6 strengthens AKT activation in HCC cells. Therefore, these findings provide mechanistic insights into the USP22-mediated control of oncogenic AKT signaling, emphasizing the importance of USP22-E2F6 regulation in HCC development.
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Affiliation(s)
- Tiantian Jing
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200240, China
| | - Boshi Wang
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200240, China
| | - Zhaojuan Yang
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200240, China
| | - Yun Liu
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200240, China
| | - Guiqin Xu
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200240, China
| | - Xiaoli Xu
- Shanghai Jiao Tong University School of Biomedical Engineering, Shanghai, 200030, China
| | - Kun Jiao
- Shanghai Jiao Tong University School of Biomedical Engineering, Shanghai, 200030, China
| | - Zehong Chen
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200240, China
| | - Lvzhu Xiang
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200240, China
| | - Li Zhang
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200240, China.
| | - Yongzhong Liu
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200240, China.
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Francia M, Stortz M, Echegaray CV, Oses C, Verneri P, Petrone MV, Toro A, Waisman A, Miriuka S, Cosentino MS, Levi V, Guberman A. SUMO conjugation susceptibility of Akt/protein kinase B affects the expression of the pluripotency transcription factor Nanog in embryonic stem cells. PLoS One 2021; 16:e0254447. [PMID: 34242346 PMCID: PMC8270172 DOI: 10.1371/journal.pone.0254447] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2021] [Accepted: 06/27/2021] [Indexed: 12/24/2022] Open
Abstract
Akt/PKB is a kinase involved in the regulation of a wide variety of cell processes. Its activity is modulated by diverse post-translational modifications (PTMs). Particularly, conjugation of the small ubiquitin-related modifier (SUMO) to this kinase impacts on multiple cellular functions, such as proliferation and splicing. In embryonic stem (ES) cells, this kinase is key for pluripotency maintenance. Among other functions, Akt is known to promote the expression of Nanog, a central pluripotency transcription factor (TF). However, the relevance of this specific PTM of Akt has not been previously analyzed in this context. In this work, we study the effect of Akt1 variants with differential SUMOylation susceptibility on the expression of Nanog. Our results demonstrate that both, the Akt1 capability of being modified by SUMO conjugation and a functional SUMO conjugase activity are required to induce Nanog gene expression. Likewise, we found that the common oncogenic E17K Akt1 mutant affected Nanog expression in ES cells also in a SUMOylatability dependent manner. Interestingly, this outcome takes places in ES cells but not in a non-pluripotent heterologous system, suggesting the presence of a crucial factor for this induction in ES cells. Remarkably, the two major candidate factors to mediate this induction, GSK3-β and Tbx3, are non-essential players of this effect, suggesting a complex mechanism probably involving non-canonical pathways. Furthermore, we found that Akt1 subcellular distribution does not depend on its SUMOylatability, indicating that Akt localization has no influence on the effect on Nanog, and that besides the membrane localization of E17K Akt mutant, SUMOylation is also required for its hyperactivity. Our results highlight the impact of SUMO conjugation in the function of a kinase relevant for a plethora of cellular processes, including the control of a key pluripotency TF.
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Affiliation(s)
- Marcos Francia
- Instituto de Química Biológica de la Facultad de Ciencias Exactas y Naturales (IQUIBICEN, CONICET-UBA), Departamento de Química Biológica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Autónoma de Buenos Aires, Argentina
| | - Martin Stortz
- Instituto de Química Biológica de la Facultad de Ciencias Exactas y Naturales (IQUIBICEN, CONICET-UBA), Departamento de Química Biológica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Autónoma de Buenos Aires, Argentina
| | - Camila Vazquez Echegaray
- Instituto de Química Biológica de la Facultad de Ciencias Exactas y Naturales (IQUIBICEN, CONICET-UBA), Departamento de Química Biológica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Autónoma de Buenos Aires, Argentina
| | - Camila Oses
- Instituto de Química Biológica de la Facultad de Ciencias Exactas y Naturales (IQUIBICEN, CONICET-UBA), Departamento de Química Biológica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Autónoma de Buenos Aires, Argentina
| | - Paula Verneri
- Instituto de Química Biológica de la Facultad de Ciencias Exactas y Naturales (IQUIBICEN, CONICET-UBA), Departamento de Química Biológica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Autónoma de Buenos Aires, Argentina
| | - María Victoria Petrone
- Instituto de Química Biológica de la Facultad de Ciencias Exactas y Naturales (IQUIBICEN, CONICET-UBA), Departamento de Química Biológica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Autónoma de Buenos Aires, Argentina
| | - Ayelen Toro
- Instituto de Química Biológica de la Facultad de Ciencias Exactas y Naturales (IQUIBICEN, CONICET-UBA), Departamento de Química Biológica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Autónoma de Buenos Aires, Argentina
| | - Ariel Waisman
- Laboratorio de Investigación Aplicada a las Neurociencias Fundación para la Lucha contra las Enfermedades Neurológicas de la Infancia (LIAN, FLENI-CONICET), Escobar, Provincia de Buenos Aires, Argentina
| | - Santiago Miriuka
- Laboratorio de Investigación Aplicada a las Neurociencias Fundación para la Lucha contra las Enfermedades Neurológicas de la Infancia (LIAN, FLENI-CONICET), Escobar, Provincia de Buenos Aires, Argentina
| | - María Soledad Cosentino
- Instituto de Química Biológica de la Facultad de Ciencias Exactas y Naturales (IQUIBICEN, CONICET-UBA), Departamento de Química Biológica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Autónoma de Buenos Aires, Argentina
| | - Valeria Levi
- Instituto de Química Biológica de la Facultad de Ciencias Exactas y Naturales (IQUIBICEN, CONICET-UBA), Departamento de Química Biológica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Autónoma de Buenos Aires, Argentina
| | - Alejandra Guberman
- Instituto de Química Biológica de la Facultad de Ciencias Exactas y Naturales (IQUIBICEN, CONICET-UBA), Departamento de Química Biológica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Autónoma de Buenos Aires, Argentina
- Departamento de Fisiología y Biología Molecular y Celular, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Autónoma de Buenos Aires, Argentina
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Akt Isoforms: A Family Affair in Breast Cancer. Cancers (Basel) 2021; 13:cancers13143445. [PMID: 34298660 PMCID: PMC8306188 DOI: 10.3390/cancers13143445] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Revised: 07/06/2021] [Accepted: 07/07/2021] [Indexed: 12/11/2022] Open
Abstract
Simple Summary Breast cancer is the second leading cause of cancer-related death in women in the United States. The Akt signaling pathway is deregulated in approximately 70% of patients with breast cancer. While targeting Akt is an effective therapeutic strategy for the treatment of breast cancer, there are several members in the Akt family that play distinct roles in breast cancer. However, the function of Akt isoforms depends on many factors. This review analyzes current progress on the isoform-specific functions of Akt isoforms in breast cancer. Abstract Akt, also known as protein kinase B (PKB), belongs to the AGC family of protein kinases. It acts downstream of the phosphatidylinositol 3-kinase (PI3K) and regulates diverse cellular processes, including cell proliferation, cell survival, metabolism, tumor growth and metastasis. The PI3K/Akt signaling pathway is frequently deregulated in breast cancer and plays an important role in the development and progression of breast cancer. There are three closely related members in the Akt family, namely Akt1(PKBα), Akt2(PKBβ) and Akt3(PKBγ). Although Akt isoforms share similar structures, they exhibit redundant, distinct as well as opposite functions. While the Akt signaling pathway is an important target for cancer therapy, an understanding of the isoform-specific function of Akt is critical to effectively target this pathway. However, our perception regarding how Akt isoforms contribute to the genesis and progression of breast cancer changes as we gain new knowledge. The purpose of this review article is to analyze current literatures on distinct functions of Akt isoforms in breast cancer.
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Lu Z, Song W, Zhang Y, Wu C, Zhu M, Wang H, Li N, Zhou Y, Xu H. Combined Anti-Cancer Effects of Platycodin D and Sorafenib on Androgen-Independent and PTEN-Deficient Prostate Cancer. Front Oncol 2021; 11:648985. [PMID: 34026624 PMCID: PMC8138035 DOI: 10.3389/fonc.2021.648985] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2021] [Accepted: 04/08/2021] [Indexed: 12/15/2022] Open
Abstract
Castration-resistant (androgen-independent) and PTEN-deficient prostate cancer is a challenge in clinical practice. Sorafenib has been recommended for the treatment of this type of cancer, but is associated with several adverse effects. Platycodin D (PD) is a triterpene saponin with demonstrated anti-cancer effects and a good safety profile. Previous studies have indicated that PC3 cells (PTEN -/-, AR -/-) are sensitive to PD, suggesting that it may also be a useful treatment for castration-resistance prostate cancer. We herein investigated the effects of combining PD with sorafenib to treat PTEN-deficient prostate cancer cells. Our data show that PD promotes sorafenib-induced apoptosis and cell cycle arrest in PC3 cells. Of interest, PD only promoted the anti-cancer effects of sorafenib in Akt-positive and PTEN-negative prostate cancer cells. Mechanistic studies revealed that PD promoted p-Akt ubiquitination by increasing the p-Akt level. PD also increased the protein and mRNA expression of FOXO3a, the downstream target of Akt. Meanwhile, PD promoted the activity of FOXO3a and increased the protein expression of Fasl, Bim and TRAIL. Interestingly, when FOXO3a expression was inhibited, the antitumor effects of both PD and sorafenib were individually inhibited, and the more potent effects of the combination treatment were inhibited. Thus, the combination of PD and sorafenib may exert potent anti-cancer effects specifically via FOXO3a. The use of Akt inhibitors or FOXO3a agonists, such as PD, may represent a promising approach for the treatment of androgen-independent and PTEN-deficient prostate cancer.
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Affiliation(s)
- Zongliang Lu
- Department of Clinical Nutrition, Daping Hospital, Army Medical University, Chongqing, China
| | - Wei Song
- Department of Clinical Nutrition, Daping Hospital, Army Medical University, Chongqing, China
| | - Yaowen Zhang
- Department of Clinical Nutrition, Daping Hospital, Army Medical University, Chongqing, China
| | - Changpeng Wu
- Department of Clinical Nutrition, Daping Hospital, Army Medical University, Chongqing, China
| | - Mingxing Zhu
- Department of Clinical Nutrition, Daping Hospital, Army Medical University, Chongqing, China
| | - He Wang
- Department of Clinical Nutrition, Daping Hospital, Army Medical University, Chongqing, China
| | - Na Li
- Department of Clinical Nutrition, Daping Hospital, Army Medical University, Chongqing, China
| | - Yong Zhou
- Department of Clinical Nutrition, Banan District People's Hospital of Chongqing, Chongqing, China
| | - Hongxia Xu
- Department of Clinical Nutrition, Daping Hospital, Army Medical University, Chongqing, China
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55
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Akkol EK, Dereli FTG, Sobarzo-Sánchez E, Khan H. Roles of Medicinal Plants and Constituents in Gynecological Cancer Therapy: Current Literature and Future Directions. Curr Top Med Chem 2021; 20:1772-1790. [PMID: 32297581 DOI: 10.2174/1568026620666200416084440] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2019] [Revised: 03/05/2020] [Accepted: 03/16/2020] [Indexed: 12/20/2022]
Abstract
Gynecologic cancers, including cervical, primary peritoneal, ovarian, uterine/endometrial, vaginal and vulvar cancers and gestational trophoblastic disease, are characterized by abnormal cell proliferation in female reproductive cells. Due to the variable pathology of these cancers and the lack of appropriate screening tests in developing countries, cancer diagnosis can be reported in advanced stages in most women and this situation adversely affects prognosis and clinical outcomes of illness. For this reason, many researchers in the field of gynecological oncology have carried out many studies. The treatment of various gynecological problems, which cause physical, biological and psychosocial conditions such as fear, shame, blame and anger, has been important throughout the history. Treatment with herbs has become popular nowadays due to the serious side effects of the synthetic drugs used in treatment and the medical and economical problems caused by them. Many scientists have identified various active drug substances through in vivo and in vitro biological activity studies on medicinal plants from the past to the present. While the intrinsic complexity of natural product-based drug discoveries requires highly integrated interdisciplinary approaches, scientific and technological advances and research trends clearly show that natural products will be among the most important new drug sources in the future. In this review, an overview of the studies conducted for the discovery of multitargeted drug molecules in the rational treatment of gynecological cancers is presented.
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Affiliation(s)
- Esra Küpeli Akkol
- Department of Pharmacognosy, Faculty of Pharmacy, Gazi University, Etiler 06330, Ankara, Turkey
| | | | - Eduardo Sobarzo-Sánchez
- Instituto de Investigación e Innovación en Salud, Facultad de Ciencias de la Salud, Universidad Central de Chile, 8330507 Santiago, Spain
| | - Haroon Khan
- Department of Pharmacy, Abdul Wali Khan University, Mardan 23200, Pakistan
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56
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Diker NY, Kutluay VM. The evaluation of the antidiabetic effects of red wine polyphenols with the view of in silico prediction methods. FOOD BIOSCI 2021. [DOI: 10.1016/j.fbio.2021.100920] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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57
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Suzuki J. Effects of hyperbaric environment on endurance and metabolism are exposure time-dependent in well-trained mice. Physiol Rep 2021; 9:e14780. [PMID: 33650813 PMCID: PMC7923584 DOI: 10.14814/phy2.14780] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2020] [Revised: 11/16/2020] [Accepted: 11/24/2020] [Indexed: 11/24/2022] Open
Abstract
Hyperbaric exposure (1.3 atmospheres absolute with 20.9% O2 ) for 1 h a day was shown to improve exercise capacity. The present study was designed to reveal whether the daily exposure time affects exercise performance and metabolism in skeletal and cardiac muscles. Male mice in the training group were housed in a cage with a wheel activity device for 7 weeks from 5 weeks old. Trained mice were then subjected to hybrid training (HT, endurance exercise for 30 min followed by sprint interval exercise for 30 min). Hyperbaric exposure was applied following daily HT for 15 min (15HT), 30 min (30HT), or 60 min (60HT) for 4 weeks. In the endurance capacity test, maximal work values were significantly increased by 30HT and 60HT. In the left ventricle (LV), activity levels of 3-hydroxyacyl-CoA-dehydrogenase, citrate synthase, and carnitine palmitoyl transferase (CPT) 2 were significantly increased by 60HT. CPT2 activity levels were markedly increased by hyperbaric exposure in red gastrocnemius (Gr) and plantaris muscle (PL). Pyruvate dehydrogenase complex activity values in PL were enhanced more by 30HT and 60HT than by HT. Protein levels of N-terminal isoform of PGC1α (NT-PGC1α) protein were significantly enhanced in three hyperbaric exposed groups in Gr, but not in LV. These results indicate that hyperbaric exposure for 30 min or longer has beneficial effects on endurance, and 60-min exposure has the potential to further increase performance by facilitating fatty acid metabolism in skeletal and cardiac muscles in highly trained mice. NT-PGC1α may have important roles for these adaptations in skeletal muscle.
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Affiliation(s)
- Junichi Suzuki
- Laboratory of Exercise PhysiologyHealth and Sports SciencesCourse of Sports EducationDepartment of EducationHokkaido University of EducationIwamizawaJapan
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58
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Blaustein M, Piegari E, Martínez Calejman C, Vila A, Amante A, Manese MV, Zeida A, Abrami L, Veggetti M, Guertin DA, van der Goot FG, Corvi MM, Colman-Lerner A. Akt Is S-Palmitoylated: A New Layer of Regulation for Akt. Front Cell Dev Biol 2021; 9:626404. [PMID: 33659252 PMCID: PMC7917195 DOI: 10.3389/fcell.2021.626404] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Accepted: 01/25/2021] [Indexed: 11/13/2022] Open
Abstract
The protein kinase Akt/PKB participates in a great variety of processes, including translation, cell proliferation and survival, as well as malignant transformation and viral infection. In the last few years, novel Akt posttranslational modifications have been found. However, how these modification patterns affect Akt subcellular localization, target specificity and, in general, function is not thoroughly understood. Here, we postulate and experimentally demonstrate by acyl-biotin exchange (ABE) assay and 3H-palmitate metabolic labeling that Akt is S-palmitoylated, a modification related to protein sorting throughout subcellular membranes. Mutating cysteine 344 into serine blocked Akt S-palmitoylation and diminished its phosphorylation at two key sites, T308 and T450. Particularly, we show that palmitoylation-deficient Akt increases its recruitment to cytoplasmic structures that colocalize with lysosomes, a process stimulated during autophagy. Finally, we found that cysteine 344 in Akt1 is important for proper its function, since Akt1-C344S was unable to support adipocyte cell differentiation in vitro. These results add an unexpected new layer to the already complex Akt molecular code, improving our understanding of cell decision-making mechanisms such as cell survival, differentiation and death.
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Affiliation(s)
- Matías Blaustein
- Departamento de Fisiología, Biología Molecular y Celular (DFBMC), Facultad de Ciencias Exactas y Naturales (FCEN), Universidad de Buenos Aires (UBA), Buenos Aires, Argentina.,Instituto de Fisiología, Biología Molecular y Neurociencias (IFIBYNE), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)-UBA, Buenos Aires, Argentina.,Instituto de Biociencias, Biotecnología y Biología Traslacional (iB3), Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Estefanía Piegari
- Departamento de Fisiología, Biología Molecular y Celular (DFBMC), Facultad de Ciencias Exactas y Naturales (FCEN), Universidad de Buenos Aires (UBA), Buenos Aires, Argentina.,Instituto de Fisiología, Biología Molecular y Neurociencias (IFIBYNE), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)-UBA, Buenos Aires, Argentina
| | - Camila Martínez Calejman
- Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, MA, United States
| | - Antonella Vila
- Departamento de Fisiología, Biología Molecular y Celular (DFBMC), Facultad de Ciencias Exactas y Naturales (FCEN), Universidad de Buenos Aires (UBA), Buenos Aires, Argentina.,Instituto de Fisiología, Biología Molecular y Neurociencias (IFIBYNE), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)-UBA, Buenos Aires, Argentina.,Instituto de Biociencias, Biotecnología y Biología Traslacional (iB3), Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Analía Amante
- Departamento de Fisiología, Biología Molecular y Celular (DFBMC), Facultad de Ciencias Exactas y Naturales (FCEN), Universidad de Buenos Aires (UBA), Buenos Aires, Argentina.,Instituto de Fisiología, Biología Molecular y Neurociencias (IFIBYNE), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)-UBA, Buenos Aires, Argentina.,Instituto de Biociencias, Biotecnología y Biología Traslacional (iB3), Universidad de Buenos Aires, Buenos Aires, Argentina
| | - María Victoria Manese
- Laboratorio de bioquímica y biología celular de parásitos, Instituto Tecnológico de Chascomús (IIB-INTECH), Universidad Nacional de San Martín (UNSAM) - CONICET, Chascomús, Argentina
| | - Ari Zeida
- Departamento de Bioquímica and Centro de Investigaciones Biomédicas (CEINBIO), Facultad de Medicina, Universidad de la República, Montevideo, Uruguay
| | - Laurence Abrami
- Global Health Institute, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Mariela Veggetti
- Departamento de Fisiología, Biología Molecular y Celular (DFBMC), Facultad de Ciencias Exactas y Naturales (FCEN), Universidad de Buenos Aires (UBA), Buenos Aires, Argentina.,Instituto de Fisiología, Biología Molecular y Neurociencias (IFIBYNE), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)-UBA, Buenos Aires, Argentina
| | - David A Guertin
- Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, MA, United States.,Department of Molecular, Cell and Cancer Biology, University of Massachusetts Medical School, Worcester, MA, United States.,Lei Weibo Institute for Rare Diseases, University of Massachusetts Medical School, Worcester, MA, United States
| | - F Gisou van der Goot
- Global Health Institute, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - María Martha Corvi
- Laboratorio de bioquímica y biología celular de parásitos, Instituto Tecnológico de Chascomús (IIB-INTECH), Universidad Nacional de San Martín (UNSAM) - CONICET, Chascomús, Argentina
| | - Alejandro Colman-Lerner
- Departamento de Fisiología, Biología Molecular y Celular (DFBMC), Facultad de Ciencias Exactas y Naturales (FCEN), Universidad de Buenos Aires (UBA), Buenos Aires, Argentina.,Instituto de Fisiología, Biología Molecular y Neurociencias (IFIBYNE), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)-UBA, Buenos Aires, Argentina
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Kepchia D, Currais A, Dargusch R, Finley K, Schubert D, Maher P. Geroprotective effects of Alzheimer's disease drug candidates. Aging (Albany NY) 2021; 13:3269-3289. [PMID: 33550278 PMCID: PMC7906177 DOI: 10.18632/aging.202631] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2020] [Accepted: 01/14/2021] [Indexed: 04/18/2023]
Abstract
Geroprotectors are compounds that slow the biological aging process in model organisms and may therefore extend healthy lifespan in humans. It is hypothesized that they do so by preserving the more youthful function of multiple organ systems. However, this hypothesis has rarely been tested in any organisms besides C. elegans and D. melanogaster. To determine if two life-extending compounds for Drosophila maintain a more youthful phenotype in old mice, we asked if they had anti-aging effects in both the brain and kidney. We utilized rapidly aging senescence-accelerated SAMP8 mice to investigate age-associated protein level alterations in these organs. The test compounds were two cognition-enhancing Alzheimer's disease drug candidates, J147 and CMS121. Mice were fed the compounds in the last quadrant of their lifespan, when they have cognitive deficits and are beginning to develop CKD. Both compounds improved physiological markers for brain and kidney function. However, these two organs had distinct, tissue-specific protein level alterations that occurred with age, but in both cases, drug treatments restored a more youthful level. These data show that geroprotective AD drug candidates J147 and CMS121 prevent age-associated disease in both brain and kidney, and that their apparent mode of action in each tissue is distinct.
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Affiliation(s)
- Devin Kepchia
- Cellular Neurobiology Laboratory, The Salk Institute for Biological Studies, La Jolla, CA 92037, USA
| | - Antonio Currais
- Cellular Neurobiology Laboratory, The Salk Institute for Biological Studies, La Jolla, CA 92037, USA
| | - Richard Dargusch
- Cellular Neurobiology Laboratory, The Salk Institute for Biological Studies, La Jolla, CA 92037, USA
| | - Kim Finley
- Donald P. Shiley BioScience Center, San Diego State University, San Diego, CA 92115, USA
| | - David Schubert
- Cellular Neurobiology Laboratory, The Salk Institute for Biological Studies, La Jolla, CA 92037, USA
| | - Pamela Maher
- Cellular Neurobiology Laboratory, The Salk Institute for Biological Studies, La Jolla, CA 92037, USA
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60
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Du HY, Wang R, Li JL, Luo H, Xie XY, Yan R, Jian YL, Cai JY. Ligustrazine induces viability, suppresses apoptosis and autophagy of retinal ganglion cells with ischemia/reperfusion injury through the PI3K/Akt/mTOR signaling pathway. Bioengineered 2021; 12:507-515. [PMID: 33522374 PMCID: PMC8806313 DOI: 10.1080/21655979.2021.1880060] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Ligustrazine, an alkaloid monomer extracted from Chuanxiong Rhizoma, has the function of protecting nerve cells. However, the effect and mechanism of ligustrazine on retinal ischemia/reperfusion (I/R) injury still need to be clarified. In our study, retinal ganglion cells (RGC-5) were used to establish a retinal I/R injury model by anaerobic cultivation. Cell viability, autophagy, and apoptosis were evaluated by cell counting kit 8 assay, transmission electron microscopy, and TUNEL staining after treatment with ligustrazine, PI3K inhibitor Ly294002, and/or mTOR inhibitor rapamycin, respectively. Besides, the levels of PI3K/Akt/mTOR pathway and autophagy-related proteins were determined by western blot. Moreover, one-way ANOVA was adopted for inter-group comparisons of measurement data. Our results demonstrated that low-concentration ligustrazine significantly enhanced cell viability and suppressed cell autophagy and apoptosis of RGC-5 cells after I/R injury, suggesting the protective effect of low-concentration ligustrazine on retinal I/R injury. Moreover, the alleviating effect of ligustrazine on RGC-5 with retinal I/R injury was mechanistically associated with the activation of the PI3K/Akt/mTOR pathway. In conclusion, low-concentration ligustrazine has a significant protective effect on RGC-5 cells with retinal I/R injury by activating the PI3K/Akt/mTOR pathway.
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Affiliation(s)
- Hong-Yan Du
- Department of Ophthalmology, The Affiliated Traditional Chinese Medicine Hospital of Guangzhou Medical University , Guangzhou, China
| | - Rong Wang
- Department of Ophthalmology, The Affiliated Traditional Chinese Medicine Hospital of Guangzhou Medical University , Guangzhou, China
| | - Jian-Liang Li
- Department of Ophthalmology, The Affiliated Traditional Chinese Medicine Hospital of Guangzhou Medical University , Guangzhou, China
| | - Huang Luo
- Department of Ophthalmology, The Affiliated Traditional Chinese Medicine Hospital of Guangzhou Medical University , Guangzhou, China
| | - Xiao-Yan Xie
- Department of Ophthalmology, The Affiliated Traditional Chinese Medicine Hospital of Guangzhou Medical University , Guangzhou, China
| | - Ran Yan
- Department of Ophthalmology, The Affiliated Traditional Chinese Medicine Hospital of Guangzhou Medical University , Guangzhou, China
| | - Yue-Ling Jian
- Department of Ophthalmology, The Affiliated Traditional Chinese Medicine Hospital of Guangzhou Medical University , Guangzhou, China
| | - Jin-Ying Cai
- Department of Ophthalmology, The Affiliated Traditional Chinese Medicine Hospital of Guangzhou Medical University , Guangzhou, China
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61
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Bi J, Shen J, Chen C, Li Z, Tan H, Sun P, Lin Y. Role of melatonin in the dynamics of acute spinal cord injury in rats. J Cell Mol Med 2021; 25:2909-2917. [PMID: 33497543 PMCID: PMC7957213 DOI: 10.1111/jcmm.16325] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Revised: 07/31/2020] [Accepted: 01/05/2021] [Indexed: 12/13/2022] Open
Abstract
Melatonin is well‐documented to have the ability of reducing nerve inflammation and scavenging free radicals. However, the therapeutic effect of melatonin on spinal cord injury has not been fully described. In this study, we assessed the effect of melatonin on T9 spinal cord injury established by Allen method in rats. Melatonin deficiency significantly delayed the recovery of sensory and motor functions in SCI rats. Treatment with melatonin significantly alleviated neuronal apoptosis and accelerated the recovery of spinal cord function. These results suggest that melatonin is effective to ameliorate spinal cord injury through inhibition of neuronal apoptosis and promotion of neuronal repair.
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Affiliation(s)
- Jiaqi Bi
- Department of Orthopaedic Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.,Department of Orthopaedic Surgery, The First Hospital of Harbin and Harbin Institute of Technology, Harbin, China
| | - Jianxiong Shen
- Department of Orthopaedic Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Chong Chen
- Department of Spine Surgery, Orthopedics Center of Guangdong Provincial People's Hospital and Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Zheng Li
- Department of Orthopaedic Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Haining Tan
- Department of Orthopaedic Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Peiyu Sun
- Department of Orthopaedic Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.,Department of Orthopedics, Bejing Hospital of Traditional Chinese Medicine, Beijing, China
| | - Youxi Lin
- Department of Orthopaedic Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
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62
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Chen X, Jiang Y, Li W, Li X, Lin Y, Liu X, Jiang Z, Xiao Z. Six-ingredient-Xiao-qing-long decoction inhibited TGF- β1-induced proliferation and migration of human airway smooth muscle cells by regulating FKBP51/AKT signaling. ALL LIFE 2021. [DOI: 10.1080/26895293.2021.1875055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
Affiliation(s)
- Xiufeng Chen
- Department of Pediatrics, Longhua Hospital Shanghai University of Traditional Chinese Medicine, Shanghai, People’s Republic of China
| | - Yonghong Jiang
- Department of Pediatrics, Longhua Hospital Shanghai University of Traditional Chinese Medicine, Shanghai, People’s Republic of China
| | - Wen Li
- Department of Pediatrics, Longhua Hospital Shanghai University of Traditional Chinese Medicine, Shanghai, People’s Republic of China
| | - Xiao Li
- Department of Pediatrics, Longhua Hospital Shanghai University of Traditional Chinese Medicine, Shanghai, People’s Republic of China
| | - Yan Lin
- Department of Pediatrics, Longhua Hospital Shanghai University of Traditional Chinese Medicine, Shanghai, People’s Republic of China
| | - Xiuxiu Liu
- Department of Pediatrics, Longhua Hospital Shanghai University of Traditional Chinese Medicine, Shanghai, People’s Republic of China
| | - Zhiyan Jiang
- Department of Pediatrics, Longhua Hospital Shanghai University of Traditional Chinese Medicine, Shanghai, People’s Republic of China
| | - Zhen Xiao
- Department of Pediatrics, Longhua Hospital Shanghai University of Traditional Chinese Medicine, Shanghai, People’s Republic of China
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63
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Miricescu D, Totan A, Stanescu-Spinu II, Badoiu SC, Stefani C, Greabu M. PI3K/AKT/mTOR Signaling Pathway in Breast Cancer: From Molecular Landscape to Clinical Aspects. Int J Mol Sci 2020; 22:E173. [PMID: 33375317 PMCID: PMC7796017 DOI: 10.3390/ijms22010173] [Citation(s) in RCA: 313] [Impact Index Per Article: 78.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2020] [Revised: 12/22/2020] [Accepted: 12/23/2020] [Indexed: 02/07/2023] Open
Abstract
Breast cancer is a serious health problem worldwide, representing the second cause of death through malignancies among women in developed countries. Population, endogenous and exogenous hormones, and physiological, genetic and breast-related factors are involved in breast cancer pathogenesis. The phosphatidylinositol 3-kinase (PI3K)/protein kinase B (AKT)/mammalian target of rapamycin (mTOR) is a signaling pathway involved in cell proliferation, survival, invasion, migration, apoptosis, glucose metabolism and DNA repair. In breast tumors, PIK3CA somatic mutations have been reported, located in exon 9 and exon 20. Up to 40% of PIK3CA mutations are estrogen receptor (ER) positive and human epidermal growth factor receptor 2 (HER2) -negative in primary and metastatic breast cancer. HER2 is overexpressed in 20-30% of breast cancers. HER1, HER2, HER3 and HER4 are membrane receptor tyrosine kinases involved in HER signaling to which various ligands can be attached, leading to PI3K/AKT activation. Currently, clinical studies evaluate inhibitors of the PI3K/AKT/mTOR axis. The main purpose of this review is to present general aspects of breast cancer, the components of the AKT signaling pathway, the factors that activate this protein kinase B, PI3K/AKT-breast cancer mutations, PI3K/AKT/mTOR-inhibitors, and the relationship between everolimus, temsirolimus and endocrine therapy.
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Affiliation(s)
- Daniela Miricescu
- Department of Biochemistry, Faculty of Dental Medicine, Carol Davila University of Medicine and Pharmacy, 8 Eroii Sanitari Blvd, 050474 Bucharest, Romania; (D.M.); (A.T.); (M.G.)
| | - Alexandra Totan
- Department of Biochemistry, Faculty of Dental Medicine, Carol Davila University of Medicine and Pharmacy, 8 Eroii Sanitari Blvd, 050474 Bucharest, Romania; (D.M.); (A.T.); (M.G.)
| | - Iulia-Ioana Stanescu-Spinu
- Department of Biochemistry, Faculty of Dental Medicine, Carol Davila University of Medicine and Pharmacy, 8 Eroii Sanitari Blvd, 050474 Bucharest, Romania; (D.M.); (A.T.); (M.G.)
| | - Silviu Constantin Badoiu
- Department of Anatomy and Embryology, Faculty of Medicine, Carol Davila University of Medicine and Pharmacy, 8 Eroii Sanitari Blvd, 050474 Bucharest, Romania
| | - Constantin Stefani
- Department of Family Medicine and Clinical Base, Dr. Carol Davila Central Military Emergency University Hospital, 134 Calea Plevnei, 010825 Bucharest, Romania;
| | - Maria Greabu
- Department of Biochemistry, Faculty of Dental Medicine, Carol Davila University of Medicine and Pharmacy, 8 Eroii Sanitari Blvd, 050474 Bucharest, Romania; (D.M.); (A.T.); (M.G.)
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64
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Napoli M, Li X, Ackerman HD, Deshpande AA, Barannikov I, Pisegna MA, Bedrosian I, Mitsch J, Quinlan P, Thompson A, Rajapakshe K, Coarfa C, Gunaratne PH, Marchion DC, Magliocco AM, Tsai KY, Flores ER. Pan-cancer analysis reveals TAp63-regulated oncogenic lncRNAs that promote cancer progression through AKT activation. Nat Commun 2020; 11:5156. [PMID: 33056990 PMCID: PMC7561725 DOI: 10.1038/s41467-020-18973-w] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2019] [Accepted: 09/24/2020] [Indexed: 12/16/2022] Open
Abstract
The most frequent genetic alterations across multiple human cancers are mutations in TP53 and the activation of the PI3K/AKT pathway, two events crucial for cancer progression. Mutations in TP53 lead to the inhibition of the tumour and metastasis suppressor TAp63, a p53 family member. By performing a mouse-human cross species analysis between the TAp63 metastatic mammary adenocarcinoma mouse model and models of human breast cancer progression, we identified two TAp63-regulated oncogenic lncRNAs, TROLL-2 and TROLL-3. Further, using a pan-cancer analysis of human cancers and multiple mouse models of tumour progression, we revealed that these two lncRNAs induce the activation of AKT to promote cancer progression by regulating the nuclear to cytoplasmic translocation of their effector, WDR26, via the shuttling protein NOLC1. Our data provide preclinical rationale for the implementation of these lncRNAs and WDR26 as therapeutic targets for the treatment of human tumours dependent upon mutant TP53 and/or the PI3K/AKT pathway.
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Affiliation(s)
- Marco Napoli
- Department of Molecular Oncology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, 33612, USA.,Cancer Biology and Evolution Program, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, 33612, USA
| | - Xiaobo Li
- Department of Molecular Oncology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, 33612, USA.,Cancer Biology and Evolution Program, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, 33612, USA
| | - Hayley D Ackerman
- Department of Molecular Oncology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, 33612, USA.,Cancer Biology and Evolution Program, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, 33612, USA
| | - Avani A Deshpande
- Department of Molecular Oncology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, 33612, USA.,Cancer Biology and Evolution Program, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, 33612, USA
| | - Ivan Barannikov
- Department of Molecular Oncology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, 33612, USA.,Cancer Biology and Evolution Program, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, 33612, USA
| | - Marlese A Pisegna
- Department of Molecular Oncology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, 33612, USA.,Cancer Biology and Evolution Program, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, 33612, USA
| | - Isabelle Bedrosian
- Department of Surgical Oncology, The University of Texas M.D. Anderson Cancer Center, Houston, TX, 77030, USA
| | - Jürgen Mitsch
- Advanced Data Analysis Centre, Nottingham, NG7 2RD, UK.,School of Computer Sciences University of Nottingham, Nottingham, NG7 2RD, UK
| | - Philip Quinlan
- Advanced Data Analysis Centre, Nottingham, NG7 2RD, UK.,School of Computer Sciences University of Nottingham, Nottingham, NG7 2RD, UK
| | - Alastair Thompson
- Department of Surgery, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Kimal Rajapakshe
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Cristian Coarfa
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Preethi H Gunaratne
- Department of Biology and Biochemistry, University of Houston, Houston, TX, 77004, USA
| | - Douglas C Marchion
- Department of Anatomic Pathology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, 33612, USA
| | - Anthony M Magliocco
- Department of Anatomic Pathology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, 33612, USA
| | - Kenneth Y Tsai
- Cancer Biology and Evolution Program, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, 33612, USA.,Department of Anatomic Pathology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, 33612, USA.,Department of Tumour Biology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, 33612, USA
| | - Elsa R Flores
- Department of Molecular Oncology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, 33612, USA. .,Cancer Biology and Evolution Program, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, 33612, USA.
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65
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Wu D, Li S, Liu X, Xu J, Jiang A, Zhang Y, Liu Z, Wang J, Zhou E, Wei Z, Yang Z, Guo C. Alpinetin prevents inflammatory responses in OVA-induced allergic asthma through modulating PI3K/AKT/NF-κB and HO-1 signaling pathways in mice. Int Immunopharmacol 2020; 89:107073. [PMID: 33039967 DOI: 10.1016/j.intimp.2020.107073] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Revised: 09/29/2020] [Accepted: 10/01/2020] [Indexed: 12/11/2022]
Abstract
Allergic asthma is the most common type of asthma which characterized by inflammatory responses of the airways. Alpinetin, a flavonoid compound derived from the ginger family of medicinal herbs, possesses various biological properties including anti-inflammatory, anti-oxidant and other medical effects. In this study, we aimed to evaluate the effects of alpinetin on OVA-induced allergic asthma, and further to examine its molecular mechanisms underlying these processes in vivo and in vitro. Mice were sensitized and challenged with OVA to build allergic asthma model in vivo. Bronchoalveolar lavage fluid (BALF) was collected for inflammatory cells analysis and lung tissues were examined for histopathological examination. The levels of IL-5, IL-13, IL-4, IgE, TNF-α, IL-6 and IL-1β were determined by the respective ELISA kits. The PI3K/AKT/NF-κB and HO-1 signaling pathways were examined by western blot analysis. The results showed that alpinetin significantly ameliorated OVA-induced pathologic changes of lungs, such as decreasing massive inflammatory cell infiltration and mucus hypersecretion, and reduced the number of inflammatory cells in BALF. Alpinetin also decreased the OVA-induced levels of IL-4, IL-5, IL-13 and IgE. Furthermore, alpinetin inhibited OVA-induced phosphorylation of p65, IκB, PI3K and AKT, and the activity of HO-1 in vivo. More importantly, these anti-inflammatory effects and molecular mechanisms of alpinetin has also been confirmed in LPS-stimulated RAW 264.7 macrophages in vitro. In conclusion, above results indicate that alpinetin exhibites a potent anti-inflammatory activity in allergic asthma through modulating PI3K/AKT/NF-κB and HO-1 signaling pathways, which would be used as a promising therapy agent for allergic asthma.
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Affiliation(s)
- Di Wu
- Key Laboratory of Zoonosis, Ministry of Education, College of Veterinary Medicine, Jilin University, Changchun 130062, Jilin Province, PR China
| | - Shuangqiu Li
- Key Laboratory of Zoonosis, Ministry of Education, College of Veterinary Medicine, Jilin University, Changchun 130062, Jilin Province, PR China
| | - Xiao Liu
- Key Laboratory of Zoonosis, Ministry of Education, College of Veterinary Medicine, Jilin University, Changchun 130062, Jilin Province, PR China
| | - Jingnan Xu
- College of Life Sciences and Engineering, Foshan University, Foshan 528225, Guangdong Province, PR China
| | - Aimin Jiang
- Key Laboratory of Zoonosis, Ministry of Education, College of Veterinary Medicine, Jilin University, Changchun 130062, Jilin Province, PR China
| | - Yong Zhang
- Key Laboratory of Zoonosis, Ministry of Education, College of Veterinary Medicine, Jilin University, Changchun 130062, Jilin Province, PR China
| | - Ziyi Liu
- Key Laboratory of Zoonosis, Ministry of Education, College of Veterinary Medicine, Jilin University, Changchun 130062, Jilin Province, PR China
| | - Jingjing Wang
- Key Laboratory of Zoonosis, Ministry of Education, College of Veterinary Medicine, Jilin University, Changchun 130062, Jilin Province, PR China
| | - Ershun Zhou
- College of Life Sciences and Engineering, Foshan University, Foshan 528225, Guangdong Province, PR China
| | - Zhengkai Wei
- College of Life Sciences and Engineering, Foshan University, Foshan 528225, Guangdong Province, PR China
| | - Zhengtao Yang
- Key Laboratory of Zoonosis, Ministry of Education, College of Veterinary Medicine, Jilin University, Changchun 130062, Jilin Province, PR China; College of Life Sciences and Engineering, Foshan University, Foshan 528225, Guangdong Province, PR China.
| | - Changmin Guo
- Key Laboratory of Zoonosis, Ministry of Education, College of Veterinary Medicine, Jilin University, Changchun 130062, Jilin Province, PR China.
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66
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Yue X, Han T, Hao W, Wang M, Fu Y. SHP2 knockdown ameliorates liver insulin resistance by activating IRS-2 phosphorylation through the AKT and ERK1/2 signaling pathways. FEBS Open Bio 2020; 10:2578-2587. [PMID: 33012117 PMCID: PMC7714075 DOI: 10.1002/2211-5463.12992] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Revised: 08/25/2020] [Accepted: 09/29/2020] [Indexed: 01/02/2023] Open
Abstract
Diabetes is a chronic metabolic disease characterized by insulin resistance (IR). SHP2 has previously been identified as a potential target to reduce IR in diabetes. Here, we examined the effects of SHP2 on glucose consumption (GC), IR level and the expression of insulin receptor substrate (IRS), AKT and extracellular signal-regulated kinase (ERK)1/2 proteins in a cellular and animal model of diabetes. IR was induced in hepatocellular carcinoma (HCC) cells, and SHP2 was up-regulated or down-regulated in cells. Diabetic rats were treated with SHP2 inhibitor. GC of cells, and the weight, total cholesterol, triglycerides, fasting blood glucose, fasting insulin, homeostasis model assessment-IR index and insulin sensitivity (ISI) of the rats were analyzed. The levels of SHP2 and the activation of IRS-2, AKT and ERK1/2 in cells and rats were measured by quantitative real-time PCR (qRT-PCR) or western blot. GC was reduced, but expression of SHP2 was enhanced in IR HCC cells. Phosphorylation of IRS-2 and AKT in IR HCC cells and diabetic rats was decreased, whereas phosphorylation of ERK1/2 was enhanced. In both the cell and animal models, SHP2 knockdown enhanced GC, ameliorated IR, activated IRS-2 and AKT, and inhibited ERK1/2 phosphorylation, in contrast with the effects of SHP2 overexpression. SHP2 knockdown may enhance GC and ameliorate IR through phosphorylation of IRS-2 via regulating AKT and ERK1/2 in liver.
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Affiliation(s)
- Xinxin Yue
- Department of Clinic CollegeHe UniversityShenyangChina
| | - Tao Han
- Department of OncologyThe First Affiliated Hospital of China Medical UniversityShenyangChina
| | - Wei Hao
- Department of Clinic CollegeHe UniversityShenyangChina
| | - Min Wang
- Department of Clinic CollegeHe UniversityShenyangChina
| | - Yang Fu
- Department of Burn and Plastic SurgeryGeneral Hospital of Northern Theater CommandShenyangChina
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67
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Blanco J, Cameirao C, López MC, Muñoz-Barroso I. Phosphatidylinositol-3-kinase-Akt pathway in negative-stranded RNA virus infection: a minireview. Arch Virol 2020; 165:2165-2176. [PMID: 32740830 DOI: 10.1007/s00705-020-04740-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2020] [Accepted: 06/17/2020] [Indexed: 12/23/2022]
Abstract
The PI3K/Akt signalling pathway is a crucial signalling cascade that regulates transcription, protein translation, cell growth, proliferation, cell survival, and metabolism. During viral infection, viruses exploit a variety of cellular pathways, including the well-known PI3K/Akt signalling pathway. Conversely, cells rely on this pathway to stimulate an antiviral response. The PI3K/Akt pathway is manipulated by a number of viruses, including DNA and RNA viruses and retroviruses. The aim of this review is to provide up-to-date information about the role of the PI3K-Akt pathway in infection with members of five different families of negative-sense ssRNA viruses. This pathway is hijacked for viral entry, regulation of endocytosis, suppression of premature apoptosis, viral protein expression, and replication. Although less common, the PI3K/Akt pathway can be downregulated as an immunomodulatory strategy or as a mechanism for inducing autophagy. Moreover, the cell activates this pathway as an antiviral strategy for interferon and cytokine production, among other strategies. Here, we present new data concerning the role of this pathway in infection with the paramyxovirus Newcastle disease virus (NDV). Our data seem to indicate that NDV uses the PI3K/Akt pathway to delay cell death and increase cell survival as a means of improving its replication. The interference of negative-sense ssRNA viruses with this essential pathway might have implications for the development of antiviral therapies.
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Affiliation(s)
- Javier Blanco
- Departamento de Bioquímica y Biología Molecular, Universidad de Salamanca, Edificio Departamental Lab.106. Plaza Doctores de la Reina s/n, 37007, Salamanca, Spain
| | - Cristina Cameirao
- Departamento de Bioquímica y Biología Molecular, Universidad de Salamanca, Edificio Departamental Lab.106. Plaza Doctores de la Reina s/n, 37007, Salamanca, Spain.,Centro de Investigação de Montanha (CIMO), Instituto Politécnico de Bragança, Campus de Santa Apolónia, 5300-253, Bragança, Portugal
| | - María Carmen López
- Departamento de Bioquímica y Biología Molecular, Universidad de Salamanca, Edificio Departamental Lab.106. Plaza Doctores de la Reina s/n, 37007, Salamanca, Spain
| | - Isabel Muñoz-Barroso
- Departamento de Bioquímica y Biología Molecular, Universidad de Salamanca, Edificio Departamental Lab.106. Plaza Doctores de la Reina s/n, 37007, Salamanca, Spain.
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68
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Metformin and Everolimus: A Promising Combination for Neuroendocrine Tumors Treatment. Cancers (Basel) 2020; 12:cancers12082143. [PMID: 32748870 PMCID: PMC7464161 DOI: 10.3390/cancers12082143] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Revised: 07/29/2020] [Accepted: 07/31/2020] [Indexed: 12/14/2022] Open
Abstract
Introduction: Treatment options for neuroendocrine tumors (NETs) are rarely curative, as NETs frequently show resistance to medical therapy. The use of everolimus, an mTOR inhibitor, is limited by the development of resistance, probably due to the activation of Akt signaling. In this context, the antidiabetic drug metformin is able to inhibit mTOR, providing a rationale for the use of metformin and everolimus in combination. Methods: We investigated the effects of the metformin and everolimus combination on NET cell proliferation, apoptosis, colony formation, cell viability, NET spheroids growth and the involvement of the Akt and mTOR pathways, and also developed everolimus-resistant NET cells to further study this combination. Results: Metformin and everolimus in combination are more effective than monotherapy in inhibiting pancreatic NET (PAN-NET) cell proliferation (−71% ± 13%, p < 0.0001 vs. basal), whereas no additive effects were observed on pulmonary neuroendocrine tumor (PNT) cell proliferation. The combinatorial treatment is more effective than monotherapy in inhibiting colony formation, cell viability, NET spheroids growth rate and mTOR phosphorylation in both NET cell lines. In a PAN-NET cell line, metformin did not affect Akt phosphorylation; conversely, it significantly decreased Akt phosphorylation in a PNT cell line. Using everolimus-resistant NET cells, we confirmed that metformin maintained its effects, acting by two different pathways: Akt-dependent or independent, depending on the cell type, with both leading to mTOR suppression. Conclusions: Considering the promising effects of the everolimus and metformin combination in NET cells, our results provide a rationale for its use in NET patients.
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69
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Yudushkin I. Control of Akt activity and substrate phosphorylation in cells. IUBMB Life 2020; 72:1115-1125. [PMID: 32125765 PMCID: PMC7317883 DOI: 10.1002/iub.2264] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2019] [Accepted: 02/22/2020] [Indexed: 12/20/2022]
Abstract
Protein kinase B/Akt is a serine/threonine kinase that links receptors coupled to the PI3K lipid kinase to cellular anabolic pathways. Its activity in cells is controlled by reversible phosphorylation and an intramolecular lipid-controlled allosteric switch. In this review, I outline the current progress in understanding Akt regulatory mechanisms, define three models of Akt activation in cells, and highlight how intramolecular allosterism cooperates with cell-autonomous mechanisms to control Akt localization and activity and direct it toward specific sets of substrates in cells.
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Affiliation(s)
- Ivan Yudushkin
- Department of Structural and Computational BiologyUniversity of ViennaViennaAustria
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70
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Xu F, Na L, Li Y, Chen L. Roles of the PI3K/AKT/mTOR signalling pathways in neurodegenerative diseases and tumours. Cell Biosci 2020; 10:54. [PMID: 32266056 PMCID: PMC7110906 DOI: 10.1186/s13578-020-00416-0] [Citation(s) in RCA: 359] [Impact Index Per Article: 89.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2019] [Accepted: 03/26/2020] [Indexed: 02/06/2023] Open
Abstract
The PI3 K/AKT/mTOR signalling pathway plays an important role in the regulation of signal transduction and biological processes such as cell proliferation, apoptosis, metabolism and angiogenesis. Compared with those of other signalling pathways, the components of the PI3K/AKT/mTOR signalling pathway are complicated. The regulatory mechanisms and biological functions of the PI3K/AKT/mTOR signalling pathway are important in many human diseases, including ischaemic brain injury, neurodegenerative diseases, and tumours. PI3K/AKT/mTOR signalling pathway inhibitors include single-component and dual inhibitors. Numerous PI3K inhibitors have exhibited good results in preclinical studies, and some have been clinically tested in haematologic malignancies and solid tumours. In this review, we briefly summarize the results of research on the PI3K/AKT/mTOR pathway and discuss the structural composition, activation, communication processes, regulatory mechanisms and biological functions of the PI3K/AKT/mTOR signalling pathway in the pathogenesis of neurodegenerative diseases and tumours.
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Affiliation(s)
- Fei Xu
- Department of Microbiology and Immunology, Shanghai University of Medicine & Health Sciences, 279 Zhouzhu Rd, Shanghai, 201318 China
- Collaborative Innovation Center of Shanghai University of Medicine & Health Sciences, Shanghai, 201318 China
| | - Lixin Na
- Collaborative Innovation Center of Shanghai University of Medicine & Health Sciences, Shanghai, 201318 China
- Department of Inspection and Quarantine, Shanghai University of Medicine & Health Sciences, Shanghai, 201318 China
| | - Yanfei Li
- Department of Inspection and Quarantine, Shanghai University of Medicine & Health Sciences, Shanghai, 201318 China
| | - Linjun Chen
- Department of Inspection and Quarantine, Shanghai University of Medicine & Health Sciences, Shanghai, 201318 China
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71
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Iida M, Harari PM, Wheeler DL, Toulany M. Targeting AKT/PKB to improve treatment outcomes for solid tumors. Mutat Res 2020; 819-820:111690. [PMID: 32120136 DOI: 10.1016/j.mrfmmm.2020.111690] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Revised: 01/31/2020] [Accepted: 02/11/2020] [Indexed: 12/16/2022]
Abstract
The serine/threonine kinase AKT, also known as protein kinase B (PKB), is the major substrate to phosphoinositide 3-kinase (PI3K) and consists of three paralogs: AKT1 (PKBα), AKT2 (PKBβ) and AKT3 (PKBγ). The PI3K/AKT pathway is normally activated by binding of ligands to membrane-bound receptor tyrosine kinases (RTKs) as well as downstream to G-protein coupled receptors and integrin-linked kinase. Through multiple downstream substrates, activated AKT controls a wide variety of cellular functions including cell proliferation, survival, metabolism, and angiogenesis in both normal and malignant cells. In human cancers, the PI3K/AKT pathway is most frequently hyperactivated due to mutations and/or overexpression of upstream components. Aberrant expression of RTKs, gain of function mutations in PIK3CA, RAS, PDPK1, and AKT itself, as well as loss of function mutation in AKT phosphatases are genetic lesions that confer hyperactivation of AKT. Activated AKT stimulates DNA repair, e.g. double strand break repair after radiotherapy. Likewise, AKT attenuates chemotherapy-induced apoptosis. These observations suggest that a crucial link exists between AKT and DNA damage. Thus, AKT could be a major predictive marker of conventional cancer therapy, molecularly targeted therapy, and immunotherapy for solid tumors. In this review, we summarize the current understanding by which activated AKT mediates resistance to cancer treatment modalities, i.e. radiotherapy, chemotherapy, and RTK targeted therapy. Next, the effect of AKT on response of tumor cells to RTK targeted strategies will be discussed. Finally, we will provide a brief summary on the clinical trials of AKT inhibitors in combination with radiochemotherapy, RTK targeted therapy, and immunotherapy.
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Affiliation(s)
- M Iida
- Department of Human Oncology, University of Wisconsin in Madison, Madison, WI, USA.
| | - P M Harari
- Department of Human Oncology, University of Wisconsin in Madison, Madison, WI, USA
| | - D L Wheeler
- Department of Human Oncology, University of Wisconsin in Madison, Madison, WI, USA
| | - M Toulany
- Division of Radiobiology and Molecular Environmental Research, Department of Radiation Oncology, University of Tuebingen, Tuebingen, Germany; German Cancer Consortium (DKTK), Partner Site Tuebingen, and German Cancer Research Center (DKFZ), Heidelberg, Germany.
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72
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Ou X, Lv W. Metabolic changes and interaction of tumor cell, myeloid-derived suppressor cell and T cell in hypoxic microenvironment. Future Oncol 2020; 16:383-393. [PMID: 32067476 DOI: 10.2217/fon-2019-0692] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
It is universally acknowledged that a large number of immune cells, as well as inflammatory factors, regulatory factors and metabolites, accumulate in the tumor microenvironment to jointly promote tumor escape, development and metastasis. Hypoxia is one of the characteristics in tumor microenvironment and is a common phenomenon in all solid tumors. In tumor hypoxia response, there is a key regulator called HIF-1a, which is a key transcriptional regulatory protein that regulates many critical genes. In this paper, the effects of hypoxia on glucose metabolism of tumor cells, myeloid-derived suppressor cells and T cells in tumor microenvironment were reviewed, and the interaction among the three was also described.
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Affiliation(s)
- Xiantu Ou
- Clinical laboratory of Shunde Hospital, Southern Medical University, The First People's Hospital of Shunde, No. 1 Jiazi Road, Lunjiao, Shunde District, Foshan City, Guangdong Province 528308, PR China
| | - Weibiao Lv
- Clinical laboratory of Shunde Hospital, Southern Medical University, The First People's Hospital of Shunde, No. 1 Jiazi Road, Lunjiao, Shunde District, Foshan City, Guangdong Province 528308, PR China
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73
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Ma T, Cao N, Chen K, Wang H, Xu L, Xu C, Huang P. Microcystin-LR exposure disrupts the insulin signaling pathway in C2C12 mice muscle cell line. ENVIRONMENTAL TOXICOLOGY 2020; 35:194-202. [PMID: 31714646 DOI: 10.1002/tox.22856] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2019] [Revised: 09/13/2019] [Accepted: 09/14/2019] [Indexed: 06/10/2023]
Abstract
Microcystin-LR (MC-LR) is a widely produced monocyclic heptapeptides in eutrophication waterbodies. MC-LR can induce various toxic effects in different cells. Our previous studies have found that MC-LR exposure can disrupt insulin signaling pathway in human liver cells (HL 7702). Skeletal muscle is one of the major organs for glucose disposal and responsive to insulin. However, the effects of MC-LR on insulin signaling pathway in muscle cells have not been fully explored. By using C2C12 mice muscle cells, this study aims to investigate the toxic effects of MC-LR in muscle cells with a focus on its effects on insulin signaling pathways. It was found that MC-LR entered into cells and inhibited protein phosphatase 2A (PP2A) significantly. Furthermore, MC-LR increased phosphorylation of Ser302, Ser307, Ser612 of insulin receptor substrate 1, AKT-Ser473, GSK3α-Ser21, and S6K1-Thr389 by inhibiting the activity of PP2A. The results in this study demonstrate that exposure of MCLR can disrupt the insulin pathway in muscle cells.
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Affiliation(s)
- Tianfeng Ma
- Department I of Clinical Medicine, First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Naifang Cao
- Department I of Clinical Medicine, First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Kele Chen
- Department of Biochemistry, School of Medicine, Zhejiang University, Hangzhou, China
| | - Hao Wang
- Toxicology Program in the Department of Environmental and Occupational Health Sciences, University of Washington, Seattle, Washington
| | - Lihong Xu
- Department of Biochemistry, School of Medicine, Zhejiang University, Hangzhou, China
| | - Chun Xu
- Department of Endocrinology, The Third Medical Center of Chinese PLA General Hospital, Beijing, China
| | - Pu Huang
- Department of Biochemistry, School of Medicine, Zhejiang University, Hangzhou, China
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74
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Long Y, Lu M, Cheng T, Zhan X, Zhan X. Multiomics-Based Signaling Pathway Network Alterations in Human Non-functional Pituitary Adenomas. Front Endocrinol (Lausanne) 2019; 10:835. [PMID: 31920959 PMCID: PMC6928143 DOI: 10.3389/fendo.2019.00835] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/20/2019] [Accepted: 11/15/2019] [Indexed: 12/18/2022] Open
Abstract
Non-functional pituitary adenoma (NFPA) seriously affects hypothanamus-pituitary-target organ axis system, with a series of molecule alterations in the multiple levels of genome, transcriptome, proteome, and post-translational modifications, and those molecules mutually interact in a molecular-network system. Meta analysis coupled with IPA pathway-network program was used to comprehensively analyze nine sets of documented NFPA omics data, including NFPA quantitative transcriptomics data [280 differentially expressed genes (DEGs)], NFPA quantitative proteomics data [50 differentially expressed proteins (DEPs)], NFPA mapping protein data (218 proteins), NFPA mapping protein nitration data (9 nitroproteins and 3 non-nitrated proteins), invasive NFPA quantitative transriptomics data (346 DEGs), invasive NFPA quantitative proteomics data (57 DEPs), control mapping protein data (1469 proteins), control mapping protein nitration data (8 nitroproteins), and control mapping phosphorylation data (28 phosphoproteins). A total of 62 molecular-networks with 861 hub-molecules and 519 canonical-pathways including 54 cancer-related canonical pathways were revealed. A total of 42 hub-molecule panels and 9 canonical-pathway panels were identified to significantly associate with tumorigenesis. Four important molecular-network systems, including PI3K/AKT, mTOR, Wnt, and ERK/MAPK pathway-systems, were confirmed in NFPAs by PTMScan experiments with altered expression-patterns and phosphorylations. Nineteen high-frequency hub-molecules were also validated in NFPAs with PTMScan experiment with at least 2.5-fold changes in expression or phosphorylation, including ERK, ERK1/2, Jnk, MAPK, Mek, p38 MAPK, AKT, PI3K complex, p85, PKC, FAK, Rac, Shc, HSP90, NFκB Complex, histone H3, AP1, calmodulin, and PLC. Furthermore, mTOR and Wnt pathway-systems were confirmed in NFPAs by immunoaffinity Western blot analysis, with significantly decreased expression of PRAS40 and increased phosphorylation levels of p-PRAS40 (Thr246) in mTOR pathway in NFPAs compared to controls, and with the decreased protein expressions of GSK-3β and GSK-3β, significantly increased phosphorylation levels of p-GSK3α (Ser21) and p-GSK3β (Ser9), and increased expression level of β-catenin in Wnt pathway in NFPAs compared to controls. Those findings provided a comphrensive and large-scale pathway network data for NFPAs, and offer the scientific evidence for insights into the accurate molecular mechanisms of NFPA and discovery of the effective biomarkers for diagnosis, prognosis, and determination of therapeutic targets.
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Affiliation(s)
- Ying Long
- Key Laboratory of Cancer Proteomics of Chinese Ministry of Health, Xiangya Hospital, Central South University, Changsha, China
- Hunan Engineering Laboratory for Structural Biology and Drug Design, Xiangya Hospital, Central South University, Changsha, China
- State Local Joint Engineering Laboratory for Anticancer Drugs, Xiangya Hospital, Central South University, Changsha, China
| | - Miaolong Lu
- Key Laboratory of Cancer Proteomics of Chinese Ministry of Health, Xiangya Hospital, Central South University, Changsha, China
- Hunan Engineering Laboratory for Structural Biology and Drug Design, Xiangya Hospital, Central South University, Changsha, China
- State Local Joint Engineering Laboratory for Anticancer Drugs, Xiangya Hospital, Central South University, Changsha, China
| | - Tingting Cheng
- Key Laboratory of Cancer Proteomics of Chinese Ministry of Health, Xiangya Hospital, Central South University, Changsha, China
- Hunan Engineering Laboratory for Structural Biology and Drug Design, Xiangya Hospital, Central South University, Changsha, China
- State Local Joint Engineering Laboratory for Anticancer Drugs, Xiangya Hospital, Central South University, Changsha, China
| | - Xiaohan Zhan
- Key Laboratory of Cancer Proteomics of Chinese Ministry of Health, Xiangya Hospital, Central South University, Changsha, China
- Hunan Engineering Laboratory for Structural Biology and Drug Design, Xiangya Hospital, Central South University, Changsha, China
- State Local Joint Engineering Laboratory for Anticancer Drugs, Xiangya Hospital, Central South University, Changsha, China
| | - Xianquan Zhan
- Key Laboratory of Cancer Proteomics of Chinese Ministry of Health, Xiangya Hospital, Central South University, Changsha, China
- Hunan Engineering Laboratory for Structural Biology and Drug Design, Xiangya Hospital, Central South University, Changsha, China
- State Local Joint Engineering Laboratory for Anticancer Drugs, Xiangya Hospital, Central South University, Changsha, China
- Department of Oncology, Xiangya Hospital, Central South University, Changsha, China
- National Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, China
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75
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Deng JT, Bhaidani S, Sutherland C, MacDonald JA, Walsh MP. Rho-associated kinase and zipper-interacting protein kinase, but not myosin light chain kinase, are involved in the regulation of myosin phosphorylation in serum-stimulated human arterial smooth muscle cells. PLoS One 2019; 14:e0226406. [PMID: 31834925 PMCID: PMC6910671 DOI: 10.1371/journal.pone.0226406] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2019] [Accepted: 11/26/2019] [Indexed: 01/09/2023] Open
Abstract
Myosin regulatory light chain (LC20) phosphorylation plays an important role in vascular smooth muscle contraction and cell migration. Ca2+/calmodulin-dependent myosin light chain kinase (MLCK) phosphorylates LC20 (its only known substrate) exclusively at S19. Rho-associated kinase (ROCK) and zipper-interacting protein kinase (ZIPK) have been implicated in the regulation of LC20 phosphorylation via direct phosphorylation of LC20 at T18 and S19 and indirectly via phosphorylation of MYPT1 (the myosin targeting subunit of myosin light chain phosphatase, MLCP) and Par-4 (prostate-apoptosis response-4). Phosphorylation of MYPT1 at T696 and T853 inhibits MLCP activity whereas phosphorylation of Par-4 at T163 disrupts its interaction with MYPT1, exposing the sites of phosphorylation in MYPT1 and leading to MLCP inhibition. To evaluate the roles of MLCK, ROCK and ZIPK in these phosphorylation events, we investigated the time courses of phosphorylation of LC20, MYPT1 and Par-4 in serum-stimulated human vascular smooth muscle cells (from coronary and umbilical arteries), and examined the effects of siRNA-mediated MLCK, ROCK and ZIPK knockdown and pharmacological inhibition on these phosphorylation events. Serum stimulation induced rapid phosphorylation of LC20 at T18 and S19, MYPT1 at T696 and T853, and Par-4 at T163, peaking within 30–120 s. MLCK knockdown or inhibition, or Ca2+ chelation with EGTA, had no effect on serum-induced LC20 phosphorylation. ROCK knockdown decreased the levels of phosphorylation of LC20 at T18 and S19, of MYPT1 at T696 and T853, and of Par-4 at T163, whereas ZIPK knockdown decreased LC20 diphosphorylation, but increased phosphorylation of MYPT1 at T696 and T853 and of Par-4 at T163. ROCK inhibition with GSK429286A reduced serum-induced phosphorylation of LC20 at T18 and S19, MYPT1 at T853 and Par-4 at T163, while ZIPK inhibition by HS38 reduced only LC20 diphosphorylation. We also demonstrated that serum stimulation induced phosphorylation (activation) of ZIPK, which was inhibited by ROCK and ZIPK down-regulation and inhibition. Finally, basal phosphorylation of LC20 in the absence of serum stimulation was unaffected by MLCK, ROCK or ZIPK knockdown or inhibition. We conclude that: (i) serum stimulation of cultured human arterial smooth muscle cells results in rapid phosphorylation of LC20, MYPT1, Par-4 and ZIPK, in contrast to the slower phosphorylation of kinases and other proteins involved in other signaling pathways (Akt, ERK1/2, p38 MAPK and HSP27), (ii) ROCK and ZIPK, but not MLCK, are involved in serum-induced phosphorylation of LC20, (iii) ROCK, but not ZIPK, directly phosphorylates MYPT1 at T853 and Par-4 at T163 in response to serum stimulation, (iv) ZIPK phosphorylation is enhanced by serum stimulation and involves phosphorylation by ROCK and autophosphorylation, and (v) basal phosphorylation of LC20 under serum-free conditions is not attributable to MLCK, ROCK or ZIPK.
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Affiliation(s)
- Jing-Ti Deng
- Department of Biochemistry & Molecular Biology, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Sabreena Bhaidani
- Department of Biochemistry & Molecular Biology, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Cindy Sutherland
- Department of Biochemistry & Molecular Biology, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Justin A. MacDonald
- Department of Biochemistry & Molecular Biology, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Michael P. Walsh
- Department of Biochemistry & Molecular Biology, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
- * E-mail:
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76
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Kearney AL, Cooke KC, Norris DM, Zadoorian A, Krycer JR, Fazakerley DJ, Burchfield JG, James DE. Serine 474 phosphorylation is essential for maximal Akt2 kinase activity in adipocytes. J Biol Chem 2019; 294:16729-16739. [PMID: 31548312 DOI: 10.1074/jbc.ra119.010036] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Revised: 09/15/2019] [Indexed: 01/06/2023] Open
Abstract
The Ser/Thr protein kinase Akt regulates essential biological processes such as cell survival, growth, and metabolism. Upon growth factor stimulation, Akt is phosphorylated at Ser474; however, how this phosphorylation contributes to Akt activation remains controversial. Previous studies, which induced loss of Ser474 phosphorylation by ablating its upstream kinase mTORC2, have implicated Ser474 phosphorylation as a driver of Akt substrate specificity. Here we directly studied the role of Akt2 Ser474 phosphorylation in 3T3-L1 adipocytes by preventing Ser474 phosphorylation without perturbing mTORC2 activity. This was achieved by utilizing a chemical genetics approach, where ectopically expressed S474A Akt2 was engineered with a W80A mutation to confer resistance to the Akt inhibitor MK2206, and thus allow its activation independent of endogenous Akt. We found that insulin-stimulated phosphorylation of four bona fide Akt substrates (TSC2, PRAS40, FOXO1/3a, and AS160) was reduced by ∼50% in the absence of Ser474 phosphorylation. Accordingly, insulin-stimulated mTORC1 activation, protein synthesis, FOXO nuclear exclusion, GLUT4 translocation, and glucose uptake were attenuated upon loss of Ser474 phosphorylation. We propose a model where Ser474 phosphorylation is required for maximal Akt2 kinase activity in adipocytes.
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Affiliation(s)
- Alison L Kearney
- Charles Perkins Centre, School of Life and Environmental Sciences, University of Sydney, Sydney, New South Wales 2006, Australia
| | - Kristen C Cooke
- Charles Perkins Centre, School of Life and Environmental Sciences, University of Sydney, Sydney, New South Wales 2006, Australia
| | - Dougall M Norris
- Charles Perkins Centre, School of Life and Environmental Sciences, University of Sydney, Sydney, New South Wales 2006, Australia
| | - Armella Zadoorian
- Charles Perkins Centre, School of Life and Environmental Sciences, University of Sydney, Sydney, New South Wales 2006, Australia
| | - James R Krycer
- Charles Perkins Centre, School of Life and Environmental Sciences, University of Sydney, Sydney, New South Wales 2006, Australia
| | - Daniel J Fazakerley
- Charles Perkins Centre, School of Life and Environmental Sciences, University of Sydney, Sydney, New South Wales 2006, Australia
| | - James G Burchfield
- Charles Perkins Centre, School of Life and Environmental Sciences, University of Sydney, Sydney, New South Wales 2006, Australia
| | - David E James
- Charles Perkins Centre, School of Life and Environmental Sciences, University of Sydney, Sydney, New South Wales 2006, Australia .,Sydney Medical School, University of Sydney, Sydney, New South Wales 2006, Australia
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77
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McKenzie M, Kirk RS, Walker AJ. Glucose Uptake in the Human Pathogen Schistosoma mansoni Is Regulated Through Akt/Protein Kinase B Signaling. J Infect Dis 2019; 218:152-164. [PMID: 29309602 PMCID: PMC5989616 DOI: 10.1093/infdis/jix654] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Accepted: 12/19/2017] [Indexed: 02/07/2023] Open
Abstract
Background In Schistosoma mansoni, the facilitated glucose transporter SGTP4, which is expressed uniquely in the apical surface tegumental membranes of the parasite, imports glucose from host blood to support its growth, development, and reproduction. However, the molecular mechanisms that underpin glucose uptake in this blood fluke are not understood. Methods In this study we employed techniques including Western blotting, immunolocalization, confocal laser scanning microscopy, pharmacological assays, and RNA interference to functionally characterize and map activated Akt in S mansoni. Results We find that Akt, which could be activated by host insulin and l-arginine, was active in the tegument layer of both schistosomules and adult worms. Blockade of Akt attenuated the expression and evolution of SGTP4 at the surface of the host-invading larval parasite life-stage, and suppressed SGTP4 expression at the tegument in adults; concomitant glucose uptake by the parasite was also attenuated in both scenarios. Conclusions These findings shed light on crucial mechanistic signaling processes that underpin the energetics of glucose uptake in schistosomes, which may open up novel avenues for antischistosome drug development.
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Affiliation(s)
- Maxine McKenzie
- Molecular Parasitology Laboratory, School of Life Sciences Pharmacy and Chemistry, Kingston University, Kingston upon Thames, Surrey, United Kingdom
| | - Ruth S Kirk
- Molecular Parasitology Laboratory, School of Life Sciences Pharmacy and Chemistry, Kingston University, Kingston upon Thames, Surrey, United Kingdom
| | - Anthony J Walker
- Molecular Parasitology Laboratory, School of Life Sciences Pharmacy and Chemistry, Kingston University, Kingston upon Thames, Surrey, United Kingdom
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78
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Park SM, Seo EH, Bae DH, Kim SS, Kim J, Lin W, Kim KH, Park JB, Kim YS, Yin J, Kim SY. Phosphoserine Phosphatase Promotes Lung Cancer Progression through the Dephosphorylation of IRS-1 and a Noncanonical L-Serine-Independent Pathway. Mol Cells 2019; 42:604-616. [PMID: 31446747 PMCID: PMC6715339 DOI: 10.14348/molcells.2019.0160] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2019] [Accepted: 07/29/2019] [Indexed: 12/31/2022] Open
Abstract
Phosphoserine phosphatase (PSPH) is one of the key enzymes of the L-serine synthesis pathway. PSPH is reported to affect the progression and survival of several cancers in an L-serine synthesis-independent manner, but the mechanism remains elusive. We demonstrate that PSPH promotes lung cancer progression through a noncanonical L-serine-independent pathway. PSPH was significantly associated with the prognosis of lung cancer patients and regulated the invasion and colony formation of lung cancer cells. Interestingly, L-serine had no effect on the altered invasion and colony formation by PSPH. Upon measuring the phosphatase activity of PSPH on a serine-phosphorylated peptide, we found that PSPH dephosphorylated phospho-serine in peptide sequences. To identify the target proteins of PSPH, we analyzed the protein phosphorylation profile and the PSPH-interacting protein profile using proteomic analyses and found one putative target protein, IRS-1. Immunoprecipitation and immunoblot assays validated a specific interaction between PSPH and IRS1 and the dephosphorylation of phospho-IRS-1 by PSPH in lung cancer cells. We suggest that the specific interaction and dephosphorylation activity of PSPH have novel therapeutic potential for lung cancer treatment, while the metabolic activity of PSPH, as a therapeutic target, is controversial.
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Affiliation(s)
- Seong-Min Park
- Personalized Genomic Medicine Research Center, Korea Research Institute of Bioscience & Biotechnology (KRIBB), Daejeon 34141,
Korea
- Research Institute, National Cancer Center, Goyang 10408,
Korea
| | - Eun-Hye Seo
- Genome Editing Research Center, KRIBB, Daejeon 34141,
Korea
- Department of Bioscience, University of Science and Technology, Daejeon 34113,
Korea
| | - Dong-Hyuck Bae
- Genome Editing Research Center, KRIBB, Daejeon 34141,
Korea
- Department of Bioscience, University of Science and Technology, Daejeon 34113,
Korea
| | - Sung Soo Kim
- Department of Cancer Biomedical Science, Graduate School of Cancer Science and Policy, National Cancer Center, Goyang 10408,
Korea
- Research Institute, National Cancer Center, Goyang 10408,
Korea
| | - Jina Kim
- Personalized Genomic Medicine Research Center, Korea Research Institute of Bioscience & Biotechnology (KRIBB), Daejeon 34141,
Korea
- Genome Editing Research Center, KRIBB, Daejeon 34141,
Korea
| | - Weiwei Lin
- Department of Cancer Biomedical Science, Graduate School of Cancer Science and Policy, National Cancer Center, Goyang 10408,
Korea
- Research Institute, National Cancer Center, Goyang 10408,
Korea
| | - Kyung-Hee Kim
- Department of Cancer Biomedical Science, Graduate School of Cancer Science and Policy, National Cancer Center, Goyang 10408,
Korea
- Research Institute, National Cancer Center, Goyang 10408,
Korea
| | - Jong Bae Park
- Department of Cancer Biomedical Science, Graduate School of Cancer Science and Policy, National Cancer Center, Goyang 10408,
Korea
- Research Institute, National Cancer Center, Goyang 10408,
Korea
| | - Yong Sung Kim
- Genome Editing Research Center, KRIBB, Daejeon 34141,
Korea
- Department of Bioscience, University of Science and Technology, Daejeon 34113,
Korea
| | - Jinlong Yin
- Henan and Macquarie University Joint Centre for Biomedical Innovation, School of Life Sciences, Henan University, Kaifeng 475004,
China
- Department of Cancer Biomedical Science, Graduate School of Cancer Science and Policy, National Cancer Center, Goyang 10408,
Korea
- Research Institute, National Cancer Center, Goyang 10408,
Korea
| | - Seon-Young Kim
- Personalized Genomic Medicine Research Center, Korea Research Institute of Bioscience & Biotechnology (KRIBB), Daejeon 34141,
Korea
- Department of Bioscience, University of Science and Technology, Daejeon 34113,
Korea
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79
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Gu YX, Liang XX, Yin NY, Yang Y, Wan B, Guo LH, Faiola F. New insights into mechanism of bisphenol analogue neurotoxicity: implications of inhibition of O-GlcNAcase activity in PC12 cells. Arch Toxicol 2019; 93:2661-2671. [DOI: 10.1007/s00204-019-02525-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Accepted: 07/18/2019] [Indexed: 01/25/2023]
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80
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Cheng L, Poulsen SB, Wu Q, Esteva-Font C, Olesen ETB, Peng L, Olde B, Leeb-Lundberg LMF, Pisitkun T, Rieg T, Dimke H, Fenton RA. Rapid Aldosterone-Mediated Signaling in the DCT Increases Activity of the Thiazide-Sensitive NaCl Cotransporter. J Am Soc Nephrol 2019; 30:1454-1470. [PMID: 31253651 DOI: 10.1681/asn.2018101025] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Accepted: 04/29/2019] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND The NaCl cotransporter NCC in the kidney distal convoluted tubule (DCT) regulates urinary NaCl excretion and BP. Aldosterone increases NaCl reabsorption via NCC over the long-term by altering gene expression. But the acute effects of aldosterone in the DCT are less well understood. METHODS Proteomics, bioinformatics, and cell biology approaches were combined with animal models and gene-targeted mice. RESULTS Aldosterone significantly increases NCC activity within minutes in vivo or ex vivo. These effects were independent of transcription and translation, but were absent in the presence of high potassium. In vitro, aldosterone rapidly increased intracellular cAMP and inositol phosphate accumulation, and altered phosphorylation of various kinases/kinase substrates within the MAPK/ERK, PI3K/AKT, and cAMP/PKA pathways. Inhibiting GPR30, a membrane-associated receptor, limited aldosterone's effects on NCC activity ex vivo, and NCC phosphorylation was reduced in GPR30 knockout mice. Phosphoproteomics, network analysis, and in vitro studies determined that aldosterone activates EGFR-dependent signaling. The EGFR immunolocalized to the DCT and EGFR tyrosine kinase inhibition decreased NCC activity ex vivo and in vivo. CONCLUSIONS Aldosterone acutely activates NCC to modulate renal NaCl excretion.
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Affiliation(s)
- Lei Cheng
- InterPrET Center, Department of Biomedicine, Aarhus University, Aarhus, Denmark
| | | | - Qi Wu
- InterPrET Center, Department of Biomedicine, Aarhus University, Aarhus, Denmark
| | | | - Emma T B Olesen
- InterPrET Center, Department of Biomedicine, Aarhus University, Aarhus, Denmark.,Faculty of Health and Medical Sciences, Department of Biomedical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Li Peng
- InterPrET Center, Department of Biomedicine, Aarhus University, Aarhus, Denmark
| | - Björn Olde
- Unit of Drug Target Discovery, Department of Experimental Medical Science, Lund University, Lund, Sweden
| | - L M Fredrik Leeb-Lundberg
- Unit of Drug Target Discovery, Department of Experimental Medical Science, Lund University, Lund, Sweden
| | - Trairak Pisitkun
- InterPrET Center, Department of Biomedicine, Aarhus University, Aarhus, Denmark.,Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
| | - Timo Rieg
- Department of Molecular Pharmacology and Physiology, University of South Florida, Tampa, Florida
| | - Henrik Dimke
- Department of Cardiovascular and Renal Research, Institute of Molecular Medicine, University of Southern Denmark, Odense, Denmark; and.,Department of Nephrology, Odense University Hospital, Odense, Denmark
| | - Robert A Fenton
- InterPrET Center, Department of Biomedicine, Aarhus University, Aarhus, Denmark;
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81
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Roth SW, Bitterman MD, Birnbaum MJ, Bland ML. Innate Immune Signaling in Drosophila Blocks Insulin Signaling by Uncoupling PI(3,4,5)P 3 Production and Akt Activation. Cell Rep 2019. [PMID: 29514084 PMCID: PMC5866056 DOI: 10.1016/j.celrep.2018.02.033] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
In obese adipose tissue, Toll-like receptor signaling in macrophages leads to insulin resistance in adipocytes. Similarly, Toll signaling in the Drosophila larval fat body blocks insulin-dependent growth and nutrient storage. We find that Toll acts cell autonomously to block growth but not PI(3,4,5)P3 production in fat body cells expressing constitutively active PI3K. Fat body Toll signaling blocks whole-animal growth in rictor mutants lacking TORC2 activity, but not in larvae lacking Pdk1. Phosphorylation of Akt on the Pdk1 site, Thr342, is significantly reduced by Toll signaling, and expression of mutant AktT342D rescues cell and animal growth, nutrient storage, and viability in animals with active Toll signaling. Altogether, these data show that innate immune signaling blocks insulin signaling at a more distal level than previously appreciated, and they suggest that manipulations affecting the Pdk1 arm of the pathway may have profound effects on insulin sensitivity in inflamed tissues.
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Affiliation(s)
- Stephen W Roth
- Department of Pharmacology, University of Virginia, Charlottesville, VA 22908, USA
| | - Moshe D Bitterman
- Department of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Morris J Birnbaum
- Department of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Michelle L Bland
- Department of Pharmacology, University of Virginia, Charlottesville, VA 22908, USA.
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82
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Graber ZT, Thomas J, Johnson E, Gericke A, Kooijman EE. Effect of H-Bond Donor Lipids on Phosphatidylinositol-3,4,5-Trisphosphate Ionization and Clustering. Biophys J 2019; 114:126-136. [PMID: 29320679 DOI: 10.1016/j.bpj.2017.10.029] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2017] [Revised: 10/10/2017] [Accepted: 10/13/2017] [Indexed: 12/29/2022] Open
Abstract
The phosphoinositide, phosphatidylinositol-3,4,5-trisphosphate (PI(3,4,5)P3), is a key signaling lipid in the inner leaflet of the cell plasma membrane, regulating diverse signaling pathways including cell growth and migration. In this study we investigate the impact of the hydrogen-bond donor lipids phosphatidylethanolamine (PE) and phosphatidylinositol (PI) on the charge and phase behavior of PI(3,4,5)P3. PE and PI can interact with PI(3,4,5)P3 through hydrogen-bond formation, leading to altered ionization behavior and charge distribution within the PI(3,4,5)P3 headgroup. We quantify the altered PI(3,4,5)P3 ionization behavior using a multistate ionization model to obtain micro-pKa values for the ionization of each phosphate group. The presence of PE leads to a decrease in the pKa values for the initial deprotonation of PI(3,4,5)P3, which describes the removal of the first proton of the three protons remaining at the phosphomonoester groups at pH 4.0. The decrease in these micro-pKa values thus leads to a higher charge at low pH. Additionally, the charge distribution changes lead to increased charge on the 3- and 5-phosphates. In the presence of PI, the final deprotonation of PI(3,4,5)P3 is delayed, leading to a lower charge at high pH. This is due to a combination of hydrogen-bond formation between PI and PI(3,4,5)P3, and increased surface charge due to the addition of the negatively charged PI. The interaction between PI and PI(3,4,5)P3 leads to the formation of PI and PI(3,4,5)P3-enriched domains within the membrane. These domains may have a critical impact on PI(3,4,5)P3-signaling. We also reevaluate results for all phosphatidylinositol bisphosphates as well as for PI(4,5)P2 in complex lipid mixtures with the multistate ionization model.
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Affiliation(s)
| | - Joseph Thomas
- Department of Biological Sciences, Kent State University, Kent, Ohio
| | - Emily Johnson
- Department of Biological Sciences, Kent State University, Kent, Ohio
| | - Arne Gericke
- Department of Chemistry and Biochemistry, Worcester Polytechnic Institute, Worcester, Massachusetts.
| | - Edgar E Kooijman
- Department of Biological Sciences, Kent State University, Kent, Ohio
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83
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Li H, Liu B, Wu J, Yu H, Huang H, Chen X, Chen B, Wu S, Ma J, Liu W, Chen X, Lan L, He Z, Zhang H. The inhibitory effect of tachyplesin I on thrombosis and its mechanisms. Chem Biol Drug Des 2019; 94:1672-1679. [PMID: 31108023 DOI: 10.1111/cbdd.13570] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Revised: 05/07/2019] [Accepted: 05/13/2019] [Indexed: 12/31/2022]
Abstract
Thrombotic diseases are major cause of cardiovascular diseases. This study was designed to investigate the effect of tachyplesin I on platelet aggregation and thrombosis. Platelet aggregation was analysed with a whole blood aggregometer. The mice were employed to investigate the effect of tachyplesin I on thrombosis in vivo. Tachyplesin I inhibited thrombin-induced platelet aggregation in a dose-dependent manner. Furthermore, tachyplesin I significantly reduced thrombosis in carrageenan-induced tail thrombosis model by intraperitoneal injection (0.1, 0.2 or 0.4 mg/kg) or intragastric administration (15, 30 or 60 mg/kg). Tachyplesin I also prolonged the bleeding time (BT) and clotting time (CT). The results revealed that tachyplesin I inhibited platelet aggregation and thrombosis by interfering the PI3K/AKT pathway. Tachyplesin I did not show significantly toxicity to mice under 300 mg/kg via intravenous injection. The results show that tachyplesin I inhibits thrombosis and has low toxicity. It is suggested that tachyplesin I has the potential to develop a new anti-thrombotic drug.
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Affiliation(s)
- Huimin Li
- Department of Biochemistry and Molecular Biology, Guangdong Medical University, Zhanjiang, China.,Guangdong Key Laboratory for Research and Development of Natural Drugs, Guangdong Medical University, Zhanjiang, China
| | - Bin Liu
- Department of Biochemistry and Molecular Biology, Guangdong Medical University, Zhanjiang, China
| | - Jun Wu
- Affiliated Hospital of Guangdong Medical University, Zhanjiang, Guangdong, China
| | - Huajun Yu
- Department of Biochemistry and Molecular Biology, Guangdong Medical University, Zhanjiang, China.,Guangdong Key Laboratory for Research and Development of Natural Drugs, Guangdong Medical University, Zhanjiang, China
| | - Hui Huang
- Department of Biochemistry and Molecular Biology, Guangdong Medical University, Zhanjiang, China
| | - Xi Chen
- Department of Biochemistry and Molecular Biology, Guangdong Medical University, Zhanjiang, China
| | - Baoan Chen
- Affiliated Hospital of Guangdong Medical University, Zhanjiang, Guangdong, China
| | - Shang Wu
- Department of Biochemistry and Molecular Biology, Guangdong Medical University, Zhanjiang, China
| | - Jingyao Ma
- Affiliated Hospital of Guangdong Medical University, Zhanjiang, Guangdong, China
| | - Wen Liu
- Department of Biochemistry and Molecular Biology, Guangdong Medical University, Zhanjiang, China
| | - Xiaoyi Chen
- Department of Biochemistry and Molecular Biology, Guangdong Medical University, Zhanjiang, China
| | - Liubo Lan
- Department of Biochemistry and Molecular Biology, Guangdong Medical University, Zhanjiang, China
| | - Zhan He
- Affiliated Hospital of Guangdong Medical University, Zhanjiang, Guangdong, China
| | - Haitao Zhang
- Department of Biochemistry and Molecular Biology, Guangdong Medical University, Zhanjiang, China.,Guangdong Key Laboratory for Research and Development of Natural Drugs, Guangdong Medical University, Zhanjiang, China
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84
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Sugiyama MG, Fairn GD, Antonescu CN. Akt-ing Up Just About Everywhere: Compartment-Specific Akt Activation and Function in Receptor Tyrosine Kinase Signaling. Front Cell Dev Biol 2019; 7:70. [PMID: 31131274 PMCID: PMC6509475 DOI: 10.3389/fcell.2019.00070] [Citation(s) in RCA: 80] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2019] [Accepted: 04/09/2019] [Indexed: 12/12/2022] Open
Abstract
The serine/threonine kinase Akt is a master regulator of many diverse cellular functions, including survival, growth, metabolism, migration, and differentiation. Receptor tyrosine kinases are critical regulators of Akt, as a result of activation of phosphatidylinositol-3-kinase (PI3K) signaling leading to Akt activation upon receptor stimulation. The signaling axis formed by receptor tyrosine kinases, PI3K and Akt, as well as the vast range of downstream substrates is thus central to control of cell physiology in many different contexts and tissues. This axis must be tightly regulated, as disruption of PI3K-Akt signaling underlies the pathology of many diseases such as cancer and diabetes. This sophisticated regulation of PI3K-Akt signaling is due in part to the spatial and temporal compartmentalization of Akt activation and function, including in specific nanoscale domains of the plasma membrane as well as in specific intracellular membrane compartments. Here, we review the evidence for localized activation of PI3K-Akt signaling by receptor tyrosine kinases in various specific cellular compartments, as well as that of compartment-specific functions of Akt leading to control of several fundamental cellular processes. This spatial and temporal control of Akt activation and function occurs by a large number of parallel molecular mechanisms that are central to regulation of cell physiology.
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Affiliation(s)
- Michael G. Sugiyama
- Department of Chemistry and Biology, Ryerson University, Toronto, ON, Canada
- Keenan Research Centre for Biomedical Science, St. Michael’s Hospital, Toronto, ON, Canada
| | - Gregory D. Fairn
- Keenan Research Centre for Biomedical Science, St. Michael’s Hospital, Toronto, ON, Canada
- Department of Surgery, University of Toronto, Toronto, ON, Canada
| | - Costin N. Antonescu
- Department of Chemistry and Biology, Ryerson University, Toronto, ON, Canada
- Keenan Research Centre for Biomedical Science, St. Michael’s Hospital, Toronto, ON, Canada
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85
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Zhou L, He J, Sun S, Yu Y, Zhang T, Wang M. Cryptochrome 1 Regulates Osteoblast Differentiation via the AKT Kinase and Extracellular Signal-Regulated Kinase Signaling Pathways. Cell Reprogram 2019; 21:141-151. [PMID: 30985214 DOI: 10.1089/cell.2018.0054] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
The many circadian clock genes build up a network structure that controls physiological processes, such as the sleep cycle, metabolism, and hormone secretion. Cryptochrome 1 (CRY1), as one of the critical circadian proteins, is closely related to bone formation. However, the regulatory function of CRY1 in osteogenic differentiation remains unclear. In this study, we investigated the role of CRY1 in regulating proliferation and osteoblast differentiation in C3H10 and C2C12 cells after silencing Cry1 using short hairpin RNA interference. In vitro experiments confirmed that the expression level of CRY1 gradually increased during the osteogenic differentiation process, and Cry1 knockdown inhibited the proliferation and differentiation of osteoblastic cells. In addition, Cry1 knockdown inhibited the phosphorylation of AKT kinase (AKT) and extracellular signal-regulated kinase (ERK), which suppressed the phosphatidylinositol-4,5-bisphosphate 3-kinase (PI3K)-AKT and mitogen-activated protein kinase (MAPK)-ERK signaling pathways. Taken together, these findings show that CRY1 regulates the proliferation and differentiation of osteoblastic cells in an AKT and ERK-dependent manner.
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Affiliation(s)
- Lei Zhou
- Department of Orthopedics, The Fifth People's Hospital of Shanghai, Fudan University, Shanghai, P.R. China
| | - Jun He
- Department of Orthopedics, The Fifth People's Hospital of Shanghai, Fudan University, Shanghai, P.R. China
| | - Shiwei Sun
- Department of Orthopedics, The Fifth People's Hospital of Shanghai, Fudan University, Shanghai, P.R. China
| | - Yueming Yu
- Department of Orthopedics, The Fifth People's Hospital of Shanghai, Fudan University, Shanghai, P.R. China
| | - Tieqi Zhang
- Department of Orthopedics, The Fifth People's Hospital of Shanghai, Fudan University, Shanghai, P.R. China
| | - Minghai Wang
- Department of Orthopedics, The Fifth People's Hospital of Shanghai, Fudan University, Shanghai, P.R. China
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86
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Thapa N, Horn HT, Anderson RA. Phosphoinositide spatially free AKT/PKB activation to all membrane compartments. Adv Biol Regul 2019; 72:1-6. [PMID: 30987931 DOI: 10.1016/j.jbior.2019.04.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2019] [Revised: 04/08/2019] [Accepted: 04/10/2019] [Indexed: 10/27/2022]
Abstract
Ser and Thr kinase AKT also known as protein kinase B (PKB) was discovered more than two and half decades ago and is one of the key downstream molecules in the phosphoinositide 3-kinase signaling pathways. The pleiotropic effects of this kinase have attracted intense interest and limelight in cancer biology, cancer therapy, diabetes, and cardiovascular diseases. Authors may refer to other more comprehensive and recent reviews on AKT/PKB (Manning and Cantley, 2007; Manning and Toker, 2017). AKT/PKB is one of the most enigmatic and most studied signaling molecule in cancers and is a significant therapeutic target (Brown and Banerji, 2017). Yet, how AKT/PKB activation couples with its downstream target/substrate molecules that function in diverse subcellular compartments remains obscure. Recent studies indicate the continuous interaction of AKT/PKB with PI3,4,5P3 or PI3,4P2 in a lipid membrane is required for its activation throughout the cells (Ebner et al., 2017). Here, we summarize the recent progress on the mechanism for phosphoinositide (PI3,4,5P3 and PI3,4P2) spatial control of AKT/PKB activation on the plasma membrane and endomembrane compartments.
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Affiliation(s)
- Narendra Thapa
- University of Wisconsin-Madison, School of Medicine and Public Health, 1300 University Ave, Madison, WI, 53706, USA.
| | - Hudson Tyler Horn
- University of Wisconsin-Madison, School of Medicine and Public Health, 1300 University Ave, Madison, WI, 53706, USA
| | - Richard A Anderson
- University of Wisconsin-Madison, School of Medicine and Public Health, 1300 University Ave, Madison, WI, 53706, USA.
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87
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Li J, Dou X, Li D, He M, Han M, Zhang H. Dexmedetomidine Ameliorates Post-CPB Lung Injury in Rats by Activating the PI3K/Akt Pathway. J INVEST SURG 2019; 33:576-583. [PMID: 30913929 DOI: 10.1080/08941939.2018.1529839] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Purpose: To investigate the protective effects of dexmedetomidine (Dex) on post cardiopulmonary bypass (CPB) lung injury in rats and to explore the possibility of underlying mechanisms involving phosphatidylinositol 3-kinase (PI3K)/Akt. Materials and Methods: Forty healthy male Sprague-Dawley rats were randomly divided into five groups (n = 8 for each). A left lung ischemia-reperfusion injury model of CPB was established in all five groups. Rats were given saline, dexmedetomidine (Dex), dimethyl sulfoxide (DMSO), wortmannin (Wtm), and Dex plus Wtm during the CPB process, in Group Saline, Dex, DMSO, Wtm, and Dex + Wtm, respectively. Mean arterial pressure, oxygenation index (OI), and respiratory index (RI) were measured at the following three timepoints: before CPB (T1), at the onset of opening of the left hilus pulmonis (T2), and at the end of the CPB process (T3). At T3, hematoxylin and eosin (H&E) staining was conducted to evaluate pathology of lung injury. The rate of lung tissue apoptosis was determined by flow-cytometry. The expression of Akt, p-Akt, caspase-3, and caspase-9 was assessed by Western blot. Results: Dex treatment during CPB protected rat lungs from post-CPB lung injury, manifested by improved lung function, mitigated pathological damage, and reduced lung tissue apoptosis. The expression and phosphorylation of Akt was significantly enhanced by Dex treatment compared to the saline/DMSO-treated group. Wtm, a recognized PI3K inhibitor, abolished the protective effect of Dex. The levels of caspase-3 and caspase-9 were also significantly elevated in the Wtm-treated group. Conclusions: Dex reduces post-CPB lung injury in rats, at least partially, by activating the PI3K/Akt pathway and inhibiting lung tissue apoptosis.
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Affiliation(s)
- Jian Li
- Department of Anesthesiology, Affiliated Hospital of Zunyi Medical University, Zunyi, China
| | - Xuejiao Dou
- Department of Anesthesiology, Affiliated Hospital of Zunyi Medical University, Zunyi, China
| | - Dongdong Li
- Department of Anesthesiology, Yi Du Central Hospital, Weifang, China
| | - Miao He
- Department of Anesthesiology, Affiliated Hospital of Zunyi Medical University, Zunyi, China
| | - Ming Han
- Department of Anesthesiology, Affiliated Hospital of Zunyi Medical University, Zunyi, China
| | - Hong Zhang
- Department of Anesthesiology, Affiliated Hospital of Zunyi Medical University, Zunyi, China
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88
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Saisawang C, Wongsantichon J, Robinson RC, Ketterman AJ. Glutathione transferase Omega 1‐1 (GSTO1‐1) modulates Akt and MEK1/2 signaling in human neuroblastoma cell SH‐SY5Y. Proteins 2019; 87:588-595. [DOI: 10.1002/prot.25683] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Revised: 01/21/2019] [Accepted: 03/13/2019] [Indexed: 01/13/2023]
Affiliation(s)
- Chonticha Saisawang
- Institute of Molecular BiosciencesMahidol University Salaya Nakhon Pathom Thailand
| | - Jantana Wongsantichon
- Institute of Molecular and Cell Biology, Agency for Science, Technology and Research (A*STAR) Singapore Singapore
- Mahidol‐Oxford Tropical Medicine Research Unit (MORU) Bangkok Thailand
| | - Robert C. Robinson
- Institute of Molecular and Cell Biology, Agency for Science, Technology and Research (A*STAR) Singapore Singapore
- Research Institute for Interdisciplinary ScienceOkayama University Okayama Japan
| | - Albert J. Ketterman
- Institute of Molecular BiosciencesMahidol University Salaya Nakhon Pathom Thailand
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89
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AKT2 phosphorylation of hexokinase 2 at T473 promotes tumorigenesis and metastasis in colon cancer cells via NF-κB, HIF1α, MMP2, and MMP9 upregulation. Cell Signal 2019; 58:99-110. [PMID: 30877036 DOI: 10.1016/j.cellsig.2019.03.011] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2018] [Revised: 03/10/2019] [Accepted: 03/10/2019] [Indexed: 12/19/2022]
Abstract
It has been well-established that AKT2 plays an important role in the development and progression of colon cancer; however, its precise function remains unclear. In the present study, we found that AKT2 can interact with and phosphorylate hexokinase 2 (HK2), the rate-limiting enzyme in glycolysis. Moreover, threonine phosphorylation dramatically increases its catalytic activity and enhances glycolysis. Mechanistically, AKT2 phosphorylation of HK2 at T473 was found to increase hexokinase activity and lactic acid production. A mutation in the AKT2 phosphorylation site of HK2 substantially reduced the stimulating effects of AKT2 on glycolysis, cellular apoptosis, invasion, tumorigenesis, and metastasis. In addition, AKT2 regulated NF-κB, HIF1Α, MMP2, and MMP9 via the phosphorylation of HK2 at the T473 site. Taken together, AKT2 increases the invasion, tumorigenesis, and metastasis of colon cancer cells in vitro and promotes lung metastasis in nude mice in vivo through the phosphorylation of the T473 site of HK2 by upregulating NF-κB, HIF1α, MMP2, and MMP9. In conclusion, our findings highlight a novel mechanism for the AKT2-HK2-NF-κB/HIF1α/MMP2/MMP9 axis in the regulation of colon cancer progression. Moreover, our results suggest that both AKT2 and HK2 may be potential targets for the treatment of colon cancer.
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90
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Wang M, Wang X, Li Y, Xiao Q, Cui XH, Xiao GD, Wang JC, Xu CW, Ren H, Liu D. Nutlin-3-Induced Sensitization of Non-Small Cell Lung Cancer Stem Cells to Axitinib-Induced Apoptosis Through Repression of Akt1/Wnt Signaling. Oncol Res 2019; 27:987-995. [PMID: 30832755 PMCID: PMC7848271 DOI: 10.3727/096504018x15424918479652] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
The aim of this study was to investigate the potential biological activities of nutlin-3 in the regulation of growth and proliferation of non-small cell lung cancer (NSCLC) stem cells (CSCs), which may help in sensitizing to axitinib-induced apoptosis. Nutlin-3 induction of p53 expression was used to test its role in controlling the cell division pattern and apoptosis of NSCLC cells. A549 cells and H460 cells were pretreated with nutlin-3 and then treated with either an Akt1 activator or shRNA-GSK3β, to investigate the potential role of p53 sensitization in the biological effects of axitinib. We also determined the expression levels of GSK3β and p-Akt1 in patients with NSCLC and determined their potential association with survival data using Kaplan-Meier plots and CBIOTAL. Increased p53 expression stimulated the induction of apoptosis by axitinib and promoted asymmetric cell division (ACD) of NSCLC CSCs. The repression of Akt phosphorylation induced by nutlin-3 promoted the ACD of lung CSCs, decreasing the proportion of the stem cell population. In addition to the induction of apoptosis by axitinib through inhibition of Wnt signaling, nutlin-3 treatment further enhanced axitinib-induced apoptosis by inhibiting Akt1/GSK3β/Wnt signaling. The low expression of GSK3β and increased expression of p-Akt in patients with NSCLC were closely associated with the development of NSCLC. TP53 stimulates the induction of apoptosis in NSCLC by axitinib and the ACD of lung CSCs through its regulatory effects on the p53/Akt/GSK3β pathways.
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Affiliation(s)
- Meng Wang
- Department of Thoracic Surgery and Oncology, the Second Department of Thoracic Surgery, Cancer Center, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi Province, P.R. China
| | - Xin Wang
- Department of Gastroenterology, the First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi Province, P.R. China
| | - Yuan Li
- School of Humanities and Social Sciences, Xi'an Jiaotong University, Xi'an, Shaanxi Province, P.R. China
| | - Qiang Xiao
- Department of Medical Oncology, Cancer Center, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi Province, P.R. China
| | - Xiao-Hai Cui
- Department of Thoracic Surgery and Oncology, the Second Department of Thoracic Surgery, Cancer Center, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi Province, P.R. China
| | - Guo-Dong Xiao
- Department of Thoracic Surgery and Oncology, the Second Department of Thoracic Surgery, Cancer Center, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi Province, P.R. China
| | - Ji-Chang Wang
- Department of Vascular and Endovascular Surgery, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi Province, P.R. China
| | - Chong-Wen Xu
- Department of Otorhinolaryngology, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi Province, P.R. China
| | - Hong Ren
- Department of Thoracic Surgery and Oncology, the Second Department of Thoracic Surgery, Cancer Center, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi Province, P.R. China
| | - Dapeng Liu
- Department of Thoracic Surgery and Oncology, the Second Department of Thoracic Surgery, Cancer Center, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi Province, P.R. China
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91
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Yudushkin I. Getting the Akt Together: Guiding Intracellular Akt Activity by PI3K. Biomolecules 2019; 9:biom9020067. [PMID: 30781447 PMCID: PMC6406913 DOI: 10.3390/biom9020067] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2019] [Revised: 02/11/2019] [Accepted: 02/12/2019] [Indexed: 01/02/2023] Open
Abstract
Intracellular signaling pathways mediate the rapid response of cells to environmental cues. To control the fidelity of these responses, cells coordinate the activities of signaling enzymes with the strength, timing, and localization of the upstream stimuli. Protein kinase Akt links the PI3K-coupled receptors to cellular anabolic processes by phosphorylating multiple substrates. How the cells ensure that Akt activity remains proportional to upstream signals and control its substrate specificity is unclear. In this review, I examine how cell-autonomous and intrinsic allosteric mechanisms cooperate to ensure localized, context-specific signaling in the PI3K/Akt axis.
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Affiliation(s)
- Ivan Yudushkin
- Department of Structural and Computational Biology, University of Vienna, Max F. Perutz Laboratories Vienna BioCenter, Campus Vienna Biocenter 5, Rm. 1.624, 1030 Vienna, Austria.
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92
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Song S, Lin S, Liu J, Zhang M, Du Y, Zhang D, Xu W, Wang H. Retracted
: Targeting of SPP1 by microRNA‐340 inhibits gastric cancer cell epithelial–mesenchymal transition through inhibition of the PI3K/AKT signaling pathway. J Cell Physiol 2019; 234:18587-18601. [DOI: 10.1002/jcp.28497] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2018] [Revised: 02/19/2019] [Accepted: 02/20/2019] [Indexed: 12/17/2022]
Affiliation(s)
- Su‐Zhen Song
- Department of Internal Medicine Shandong University of Traditional Chinese Medicine Jinan Shandong People's Republic of China
| | - Sen Lin
- Department of Digestive Disease The Second Hospital of Shandong University Jinan Shandong People's Republic of China
| | - Jia‐Ning Liu
- Department of Thyroid and Pancreatic Disease The Second Hospital of Shandong University Jinan Shandong People's Republic of China
| | - Ming‐Bao Zhang
- Department of Digestive Disease The Second Hospital of Shandong University Jinan Shandong People's Republic of China
| | - Ya‐Ting Du
- Department of Digestive Disease The Second Hospital of Shandong University Jinan Shandong People's Republic of China
| | - Dong‐Dong Zhang
- Department of Digestive Disease The Second Hospital of Shandong University Jinan Shandong People's Republic of China
| | - Wei‐Hua Xu
- Department of Digestive Disease The Second Hospital of Shandong University Jinan Shandong People's Republic of China
| | - Hong‐Bo Wang
- Department of Digestive Disease The Second Hospital of Shandong University Jinan Shandong People's Republic of China
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93
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A Systems Pharmacology Approach for Identifying the Multiple Mechanisms of Action of the Wei Pi Xiao Decoction for the Treatment of Gastric Precancerous Lesions. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2019; 2019:1562707. [PMID: 30854000 PMCID: PMC6378068 DOI: 10.1155/2019/1562707] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/29/2018] [Accepted: 01/08/2019] [Indexed: 02/07/2023]
Abstract
The Wei Pi Xiao (WPX) decoction, based on the theory of traditional Chinese medicine, has been widely used for the treatment of gastric precancerous lesions (GPL). Although WPX is known to be effective for the treatment of GPL, its active ingredients, cellular targets, and the precise molecular mechanism of action are not known. This study aimed to identify the multiple mechanisms of action of the WPX decoction in the treatment of GPL. The active compounds, drug targets, and the key pathways involved in the therapeutic effect of WPX in the treatment of GPL were analyzed by an integrative analysis pipeline. The information pertaining to the compounds present in WPX and their disease targets was obtained from TCMSP and GeneCards, respectively. The mechanisms underlying the therapeutic effect of WPX were investigated with gene ontology (GO) enrichment analysis and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway enrichment analysis. A total of 82 bioactive compounds and 146 related targets were identified in this study. Following target analyses, the targets were further mapped to 26 key biological processes and 21 related pathways to construct a target-pathway network and an integrated GPL pathway. The study demonstrated that the WPX formula primarily treats the dysfunctions of GPL arising from cell proliferation, apoptosis, and mucosal inflammation, which offered a novel insight into the pathogenesis of GPL and revealed the molecular mechanism underlying the therapeutic effects of the WPX formula in GPL. This study offers a novel approach for the systematic investigation of the mechanisms of action of herbal medicines, which will provide an impetus to the GPL drug development pipeline.
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AKT/protein kinase B associates with β-actin in the nucleus of melanoma cells. Biosci Rep 2019; 39:BSR20181312. [PMID: 30643008 PMCID: PMC6356016 DOI: 10.1042/bsr20181312] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2018] [Revised: 12/21/2018] [Accepted: 01/07/2019] [Indexed: 12/19/2022] Open
Abstract
The serine-threonine kinase AKT/PKB is a critical regulator of various essential cellular processes, and dysregulation of AKT has been implicated in many diseases, including cancer. Despite AKT action is known to function mainly in the cytoplasm, AKT has been reported to translocate to the nucleus. However, very little is known about the mechanism required for the nuclear import of AKT as well as its function in this cellular compartment. In the present study, we characterized the presence of endogenous nuclear AKT in human melanoma cells and addressed the possible role of AKT by exploring its potential association with key interaction nuclear partners. Confocal and Western blot analyses showed that both phosphorylated and non-phosphorylated forms of AKT are present in melanoma cells nuclei. Using mass spectrometry in combination with protein-crosslinking and co-immunoprecipitation, we identified a series of putative protein partners of nuclear AKT, including heterogeneous nuclear ribonucleoprotein (hnRNP), cytoskeleton proteins β-actin, γ-actin, β-actin-like 2 and vimentin. Confocal microscopy and biochemical analyses validated β-actin as a new nuclear AKT-interacting partner. Cofilin and active RNA Polymerase II, two proteins that have been described to interact and work in concert with nuclear actin in transcription regulation, were also found associated with nuclear AKT. Overall, the present study uncovered a yet unrecognized nuclear coupling of AKT and provides insights into the involvement of AKT in the interaction network of nuclear actin.
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95
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Rezaei M, Martins Cavaco AC, Seebach J, Niland S, Zimmermann J, Hanschmann EM, Hallmann R, Schillers H, Eble JA. Signals of the Neuropilin-1–MET Axis and Cues of Mechanical Force Exertion Converge to Elicit Inflammatory Activation in Coherent Endothelial Cells. THE JOURNAL OF IMMUNOLOGY 2019; 202:1559-1572. [DOI: 10.4049/jimmunol.1801346] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2018] [Accepted: 12/27/2018] [Indexed: 12/31/2022]
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96
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Hossain F, Sorrentino C, Ucar DA, Peng Y, Matossian M, Wyczechowska D, Crabtree J, Zabaleta J, Morello S, Del Valle L, Burow M, Collins-Burow B, Pannuti A, Minter LM, Golde TE, Osborne BA, Miele L. Notch Signaling Regulates Mitochondrial Metabolism and NF-κB Activity in Triple-Negative Breast Cancer Cells via IKKα-Dependent Non-canonical Pathways. Front Oncol 2018; 8:575. [PMID: 30564555 PMCID: PMC6289043 DOI: 10.3389/fonc.2018.00575] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2018] [Accepted: 11/15/2018] [Indexed: 12/21/2022] Open
Abstract
Triple negative breast cancer (TNBC) patients have high risk of recurrence and metastasis, and current treatment options remain limited. Cancer stem-like cells (CSCs) have been linked to cancer initiation, progression and chemotherapy resistance. Notch signaling is a key pathway regulating TNBC CSC survival. Treatment of TNBC with PI3K or mTORC1/2 inhibitors results in drug-resistant, Notch-dependent CSC. However, downstream mechanisms and potentially druggable Notch effectors in TNBC CSCs are largely unknown. We studied the role of the AKT pathway and mitochondrial metabolism downstream of Notch signaling in TNBC CSC from cell lines representative of different TNBC molecular subtypes as well as a novel patient-derived model. We demonstrate that exposure of TNBC cells to recombinant Notch ligand Jagged1 leads to rapid AKT phosphorylation in a Notch1-dependent but RBP-Jκ independent fashion. This requires mTOR and IKKα. Jagged1 also stimulates mitochondrial respiration and fermentation in an AKT- and IKK-dependent fashion. Notch1 co-localizes with mitochondria in TNBC cells. Pharmacological inhibition of Notch cleavage by gamma secretase inhibitor PF-03084014 in combination with AKT inhibitor MK-2206 or IKK-targeted NF-κB inhibitor Bay11-7082 blocks secondary mammosphere formation from sorted CD90hi or CD44+CD24low (CSCs) cells. A TNBC patient-derived model gave comparable results. Besides mitochondrial oxidative metabolism, Jagged1 also triggers nuclear, NF-κB-dependent transcription of anti-apoptotic gene cIAP-2. This requires recruitment of Notch1, IKKα and NF-κB to the cIAP-2 promoter. Our observations support a model where Jagged1 triggers IKKα-dependent, mitochondrial and nuclear Notch1 signals that stimulate AKT phosphorylation, oxidative metabolism and transcription of survival genes in PTEN wild-type TNBC cells. These data suggest that combination treatments targeting the intersection of the Notch, AKT and NF-κB pathways have potential therapeutic applications against CSCs in TNBC cases with Notch1 and wild-type PTEN expression.
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Affiliation(s)
- Fokhrul Hossain
- Louisiana State University Health Sciences Center, Stanley S. Scott Cancer Center, New Orleans, LA, United States.,Department of Genetics, Louisiana State University Health Sciences Center, New Orleans, LA, United States
| | - Claudia Sorrentino
- Louisiana State University Health Sciences Center, Stanley S. Scott Cancer Center, New Orleans, LA, United States.,Department of Pharmacy, University of Salerno, Salerno, Italy
| | - Deniz A Ucar
- Louisiana State University Health Sciences Center, Stanley S. Scott Cancer Center, New Orleans, LA, United States.,Department of Genetics, Louisiana State University Health Sciences Center, New Orleans, LA, United States
| | - Yin Peng
- Department of Pathology, The Shenzhen University School of Medicine, Shenzhen, China
| | - Margarite Matossian
- Department of Medicine, Tulane University School of Medicine, New Orleans, LA, United States
| | - Dorota Wyczechowska
- Louisiana State University Health Sciences Center, Stanley S. Scott Cancer Center, New Orleans, LA, United States
| | - Judy Crabtree
- Department of Genetics, Louisiana State University Health Sciences Center, New Orleans, LA, United States
| | - Jovanny Zabaleta
- Louisiana State University Health Sciences Center, Stanley S. Scott Cancer Center, New Orleans, LA, United States
| | - Silvana Morello
- Department of Pharmacy, University of Salerno, Salerno, Italy
| | - Luis Del Valle
- Louisiana State University Health Sciences Center, Stanley S. Scott Cancer Center, New Orleans, LA, United States
| | - Matthew Burow
- Department of Medicine, Tulane University School of Medicine, New Orleans, LA, United States
| | - Bridgette Collins-Burow
- Department of Medicine, Tulane University School of Medicine, New Orleans, LA, United States
| | - Antonio Pannuti
- Louisiana State University Health Sciences Center, Stanley S. Scott Cancer Center, New Orleans, LA, United States
| | - Lisa M Minter
- Department of Veterinary and Animal Sciences, University of Massachusetts at Amherst, Amherst, MA, United States
| | - Todd E Golde
- Department of Neuroscience, McKnight Brain Institute, University of Florida at Gainesville, Gainesville, FL, United States
| | - Barbara A Osborne
- Department of Veterinary and Animal Sciences, University of Massachusetts at Amherst, Amherst, MA, United States
| | - Lucio Miele
- Louisiana State University Health Sciences Center, Stanley S. Scott Cancer Center, New Orleans, LA, United States.,Department of Genetics, Louisiana State University Health Sciences Center, New Orleans, LA, United States
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97
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Wei Y, Zhou J, Yu H, Jin X. AKT phosphorylation sites of Ser473 and Thr308 regulate AKT degradation. Biosci Biotechnol Biochem 2018; 83:429-435. [PMID: 30488766 DOI: 10.1080/09168451.2018.1549974] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Protein kinase B (AKT) is a serine-threonine kinase that mediates diverse cellular processes in a variety of human diseases. Phosphorylation is always the best studied posttranslational modification of AKT and a connection between phosphorylation and ubiquitination has been explored recently. Ubiquitination of AKT is an important step for its phosphorylation and activation, while whether phosphorylated AKT regulated its ubiquitination status is still unknow. In the present study, we mimic dephosphorylation of AKT by using mutagenesis techniques at both Thr308 and Ser473 into Alanine (AKT-2A). After losing phosphorylation activity, AKT enhances its degradation and prevents itself release from the plasma membrane after insulin stimulation. Fourthermore, AKT-2A is found to be degraded through ubiquitin- proteasome pathway which declared that un-phosphorylation of AKT at both Ser473 and Thr308 sites increases its ubiquitination level. In conclusion, AKT phosphorylated at Ser473 and Thr308 sites have a significant effect on its ubiquitination status. Abbreviations: AKT: Protein kinase B; Ser: serine; Thr: threonine; IF: immunofluorescence; Epo: Epoxomicin; Baf: Bafilomycin; PBS: phosphate buffer solution.
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Affiliation(s)
- Yingze Wei
- a Department of Pathology , Nantong Tumor Hospital , Nantong , Jiangsu , China
| | - Jianyun Zhou
- a Department of Pathology , Nantong Tumor Hospital , Nantong , Jiangsu , China
| | - Haiyan Yu
- a Department of Pathology , Nantong Tumor Hospital , Nantong , Jiangsu , China
| | - Xiaoxia Jin
- a Department of Pathology , Nantong Tumor Hospital , Nantong , Jiangsu , China
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98
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Lu Q, Wang WW, Zhang MZ, Ma ZX, Qiu XR, Shen M, Yin XX. ROS induces epithelial-mesenchymal transition via the TGF-β1/PI3K/Akt/mTOR pathway in diabetic nephropathy. Exp Ther Med 2018; 17:835-846. [PMID: 30651870 DOI: 10.3892/etm.2018.7014] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2017] [Accepted: 03/09/2018] [Indexed: 12/12/2022] Open
Abstract
Oxidative stress has been reported to serve an important role in the development and progression of diabetic nephropathy (DN). Epithelial-mesenchymal transition (EMT) of renal tubular epithelial cells promotes renal fibrosis in DN, while the mechanism of reactive oxygen species (ROS)-mediated EMT is not fully understood. The aim of the present study was to investigate the effect of high glucose-induced ROS on the activation of the transforming growth factor (TGF)-β1/phosphoinositide 3 kinase (PI3K)/protein kinase B (Akt)/mammalian target of rapamycin (mTOR) pathway in a normal rat kidney tubular epithelial cell line (NRK-52E) and rats with type 1 diabetes. In vitro, high glucose-stimulated ROS production resulted in increased TGF-β1 expression as well as an increase in the Akt and mTOR phosphorylation ratio, resulting in EMT. When cells were pre-treated with ROS inhibitors, changes in TGF-β1, Akt and mTOR were significantly ameliorated. In vivo, diabetic rats experienced a significant decline in renal function and severe renal fibrosis compared with control rats at 8 weeks following streptozocin injection. Levels of malondialdehyde and TGF-β1/PI3K/Akt/mTOR pathway activation were increased in the renal cortex of rats with diabetes compared with the control rats. Furthermore, renal fibrosis was further aggravated in DN compared with the control rats. The results of the present study suggest that ROS serves an important role in mediating high glucose-induced EMT and inhibits activation of the TGF-β1/PI3K/Akt/mTOR pathway. ROS may therefore have potential as a treatment approach to prevent renal fibrosis in DN.
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Affiliation(s)
- Qian Lu
- Department of Pharmacy, Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, Xuzhou, Jiangsu 221004, P.R. China
| | - Wen-Wen Wang
- Department of Pharmacy, Wuxi Higher Health Vocational Technology School, Wuxi, Jiangsu 214000, P.R. China
| | - Ming-Zhu Zhang
- Deparment of Clinical Pharmacy, Changzhou Fourth People's Hospital, Changzhou, Jiangsu 213000, P.R. China
| | - Zhong-Xuan Ma
- Department of Pharmacy, Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, Xuzhou, Jiangsu 221004, P.R. China
| | - Xin-Ran Qiu
- Department of Pharmacy, Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, Xuzhou, Jiangsu 221004, P.R. China
| | - Mengli Shen
- Department of Pharmacy, Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, Xuzhou, Jiangsu 221004, P.R. China
| | - Xiao-Xing Yin
- Department of Pharmacy, Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, Xuzhou, Jiangsu 221004, P.R. China
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99
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Liu SL, Wang ZG, Hu Y, Xin Y, Singaram I, Gorai S, Zhou X, Shim Y, Min JH, Gong LW, Hay N, Zhang J, Cho W. Quantitative Lipid Imaging Reveals a New Signaling Function of Phosphatidylinositol-3,4-Bisphophate: Isoform- and Site-Specific Activation of Akt. Mol Cell 2018; 71:1092-1104.e5. [PMID: 30174291 DOI: 10.1016/j.molcel.2018.07.035] [Citation(s) in RCA: 79] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2018] [Revised: 06/08/2018] [Accepted: 07/24/2018] [Indexed: 11/25/2022]
Abstract
Activation of class I phosphatidylinositol 3-kinase (PI3K) leads to formation of phosphatidylinositol-3,4,5-trisphophate (PIP3) and phosphatidylinositol-3,4-bisphophate (PI34P2), which spatiotemporally coordinate and regulate a myriad of cellular processes. By simultaneous quantitative imaging of PIP3 and PI34P2 in live cells, we here show that they have a distinctively different spatiotemporal distribution and history in response to growth factor stimulation, which allows them to selectively induce the membrane recruitment and activation of Akt isoforms. PI34P2 selectively activates Akt2 at both the plasma membrane and early endosomes, whereas PIP3 selectively stimulates Akt1 and Akt3 exclusively at the plasma membrane. These spatiotemporally distinct activation patterns of Akt isoforms provide a mechanism for their differential regulation of downstream signaling molecules. Collectively, our studies show that different spatiotemporal dynamics of PIP3 and PI34P2 and their ability to selectively activate key signaling proteins allow them to mediate class I PI3K signaling pathways in a spatiotemporally specific manner.
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Affiliation(s)
- Shu-Lin Liu
- Department of Chemistry, University of Illinois at Chicago, Chicago, IL 60607, USA
| | - Zhi-Gang Wang
- Department of Chemistry, University of Illinois at Chicago, Chicago, IL 60607, USA
| | - Yusi Hu
- Department of Chemistry, University of Illinois at Chicago, Chicago, IL 60607, USA
| | - Yao Xin
- Department of Chemistry, University of Illinois at Chicago, Chicago, IL 60607, USA
| | - Indira Singaram
- Department of Chemistry, University of Illinois at Chicago, Chicago, IL 60607, USA
| | - Sukhamoy Gorai
- Department of Chemistry, University of Illinois at Chicago, Chicago, IL 60607, USA
| | - Xin Zhou
- Department of Pharmacology, University of California at San Diego, La Jolla, CA 92093, USA
| | - Yoonjung Shim
- Department of Chemistry, University of Illinois at Chicago, Chicago, IL 60607, USA
| | - Jung-Hyun Min
- Department of Chemistry, University of Illinois at Chicago, Chicago, IL 60607, USA
| | - Liang-Wei Gong
- Department of Biological Sciences, University of Illinois at Chicago, Chicago, IL 60607, USA
| | - Nissim Hay
- Department of Biochemistry and Molecular Genetics, University of Illinois at Chicago, Chicago, IL 60607, USA
| | - Jin Zhang
- Department of Pharmacology, University of California at San Diego, La Jolla, CA 92093, USA
| | - Wonhwa Cho
- Department of Chemistry, University of Illinois at Chicago, Chicago, IL 60607, USA; Department of Genetic Engineering, Kyung Hee University, Yongin 446-701, Republic of Korea.
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100
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Yan K, Ponnusamy M, Xin Y, Wang Q, Li P, Wang K. The role of K63-linked polyubiquitination in cardiac hypertrophy. J Cell Mol Med 2018; 22:4558-4567. [PMID: 30102008 PMCID: PMC6156430 DOI: 10.1111/jcmm.13669] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2017] [Accepted: 03/20/2018] [Indexed: 12/26/2022] Open
Abstract
Ubiquitination, also known as ubiquitylation, is a vital post‐translational modification of proteins that play a crucial role in the multiple biological processes including cell growth, proliferation and apoptosis. K63‐linked ubiquitination is one of the vital post‐translational modifications of proteins that are involved in the activation of protein kinases and protein trafficking during cell survival and proliferation. It also contributes to the development of various disorders including cancer, neurodegeneration and cardiac hypertrophy. In this review, we summarize the role of K63‐linked ubiquitination signalling in protein kinase activation and its implications in cardiac hypertrophy. We have also provided our perspectives on therapeutically targeting K63‐linked ubiquitination in downstream effector molecules of growth factor receptors for the treatment of cardiac hypertrophy.
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Affiliation(s)
- Kaowen Yan
- Institute for Translational Medicine, Qingdao University, Qingdao, China
| | | | - Ying Xin
- The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Qi Wang
- Institute for Translational Medicine, Qingdao University, Qingdao, China
| | - Peifeng Li
- Institute for Translational Medicine, Qingdao University, Qingdao, China
| | - Kun Wang
- Institute for Translational Medicine, Qingdao University, Qingdao, China
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