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Zhou J, Zheng H, Zhang H, Yu W, Li B, Ye L, Wang L. MCM5 is a Novel Therapeutic Target for Glioblastoma. Onco Targets Ther 2024; 17:371-381. [PMID: 38765057 PMCID: PMC11100520 DOI: 10.2147/ott.s457600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2024] [Accepted: 05/08/2024] [Indexed: 05/21/2024] Open
Abstract
Objective MCM5 is a DNA licensing factor involved in cell proliferation and has been previously established as an excellent biomarker in a number of malignancies. Nevertheless, the role of MCM5 in GBM has not been fully clarified. The present study aimed to investigate the potential roles of MCM5 in the treatment of GBM and to elucidate its underlying mechanism, which is beneficial for developing new therapeutic strategies and predicting prognosis. Methods Firstly, we obtained transcriptomic and proteomic data from the TCGA and CPTAC databases on glioma patients. Employing the DeSeq2 R package, we then identified genes with joint differential expression in GBM tissues subjected to chemotherapy. To develop a prognostic risk score model, we performed univariate and multivariate Cox regression analyses. In vitro knockdown and overexpression of MCM5 were used to further investigate the biological functions of GBM cells. Additionally, we also delved into the upstream regulation of MCM5, revealing associations with several transcription factors. Finally, we investigated differences in immune cell infiltration and drug sensitivity across diverse risk groups identified in the prognostic risk model. Results In this study, the chemotherapy-treated GBM samples exhibited consistent alterations in 46 upregulated and 94 downregulated genes at both the mRNA and protein levels. Notably, MCM5 emerged as a gene with prognostic significance as well as potential therapeutic relevance. In vitro experiments subsequently validated the role of increased MCM5 expression in promoting GBM cell proliferation and resistance to TMZ. Correlations with transcription factors such as CREB1, CTCF, NFYB, NRF1, PBX1, TEAD1, and USF1 were discovered during upstream regulatory analysis, enriching our understanding of MCM5 regulatory mechanisms. The study additionally delves into immune cell infiltration and drug sensitivity, providing valuable insights for personalized treatment approaches. Conclusion This study identifies MCM5 as a key player in GBM, demonstrating its prognostic significance and potential therapeutic relevance by elucidating its role in promoting cell proliferation and resistance to chemotherapy.
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Affiliation(s)
- Jian Zhou
- Hyperbaric Oxygen Department, International Cancer Center, Shenzhen University General Hospital, Shenzhen University Medical School, Shenzhen, 518055, People’s Republic of China
- Guangdong Key Laboratory for Biomedical Measurements and Ultrasound Imaging, National-Regional Key Technology Engineering Laboratory for Medical Ultrasound, School of Biomedical Engineering, Shenzhen University Medical School, Shenzhen, 518060, People’s Republic of China
| | - Housheng Zheng
- Hyperbaric Oxygen Department, International Cancer Center, Shenzhen University General Hospital, Shenzhen University Medical School, Shenzhen, 518055, People’s Republic of China
| | - Huiru Zhang
- Hyperbaric Oxygen Department, International Cancer Center, Shenzhen University General Hospital, Shenzhen University Medical School, Shenzhen, 518055, People’s Republic of China
| | - Wenqiang Yu
- Hyperbaric Oxygen Department, International Cancer Center, Shenzhen University General Hospital, Shenzhen University Medical School, Shenzhen, 518055, People’s Republic of China
| | - Baoer Li
- Hyperbaric Oxygen Department, International Cancer Center, Shenzhen University General Hospital, Shenzhen University Medical School, Shenzhen, 518055, People’s Republic of China
| | - Liang Ye
- Hyperbaric Oxygen Department, International Cancer Center, Shenzhen University General Hospital, Shenzhen University Medical School, Shenzhen, 518055, People’s Republic of China
| | - Lu Wang
- Hyperbaric Oxygen Department, International Cancer Center, Shenzhen University General Hospital, Shenzhen University Medical School, Shenzhen, 518055, People’s Republic of China
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Wang Y, Wu Z, Yan G, Li S, Zhang Y, Li G, Wu C. The CREB1 inhibitor 666-15 maintains cartilage homeostasis and mitigates osteoarthritis progression. Bone Joint Res 2024; 13:4-18. [PMID: 38163445 PMCID: PMC10758301 DOI: 10.1302/2046-3758.131.bjr-2023-0016.r2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/03/2024] Open
Abstract
Aims cAMP response element binding protein (CREB1) is involved in the progression of osteoarthritis (OA). However, available findings about the role of CREB1 in OA are inconsistent. 666-15 is a potent and selective CREB1 inhibitor, but its role in OA is unclear. This study aimed to investigate the precise role of CREB1 in OA, and whether 666-15 exerts an anti-OA effect. Methods CREB1 activity and expression of a disintegrin and metalloproteinase with thrombospondin motifs 4 (ADAMTS4) in cells and tissues were measured by immunoblotting and immunohistochemical (IHC) staining. The effect of 666-15 on chondrocyte viability and apoptosis was examined by cell counting kit-8 (CCK-8) assay, JC-10, and terminal deoxynucleotidyl transferase-mediated dUTP nick end-labelling (TUNEL) staining. The effect of 666-15 on the microstructure of subchondral bone, and the synthesis and catabolism of cartilage, in anterior cruciate ligament transection mice were detected by micro-CT, safranin O and fast green (S/F), immunohistochemical staining, and enzyme-linked immunosorbent assay (ELISA). Results CREB1 was hyperactive in osteoarthritic articular cartilage, interleukin (IL)-1β-treated cartilage explants, and IL-1β- or carbonyl cyanide 3-chlorophenylhydrazone (CCCP)-treated chondrocytes. 666-15 enhanced cell viability of OA-like chondrocytes and alleviated IL-1β- or CCCP-induced chondrocyte injury through inhibition of mitochondrial dysfunction-associated apoptosis. Moreover, inhibition of CREB1 by 666-15 suppressed expression of ADAMTS4. Additionally, 666-15 alleviated joint degeneration in an ACLT mouse model. Conclusion Hyperactive CREB1 played a critical role in OA development, and 666-15 exerted anti-IL-1β or anti-CCCP effects in vitro as well as joint-protective effects in vivo. 666-15 may therefore be used as a promising anti-OA drug.
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Affiliation(s)
- Ying Wang
- Department of Molecular Orthopedics, National Center for Orthopaedics, Beijing Research Institute of Traumatology and Orthopaedics, Beijing Jishuitan Hospital, Capital Medical University, Beijing, China
| | - Zhimin Wu
- Department of Molecular Orthopedics, National Center for Orthopaedics, Beijing Research Institute of Traumatology and Orthopaedics, Beijing Jishuitan Hospital, Capital Medical University, Beijing, China
| | - Guoqiang Yan
- National Center for Orthopaedics, Animal Laboratory, Beijing Research Institute of Traumatology and Orthopaedics, Beijing Jishuitan Hospital, Capital Medical University, Beijing, China
| | - Shan Li
- Department of Molecular Orthopedics, National Center for Orthopaedics, Beijing Research Institute of Traumatology and Orthopaedics, Beijing Jishuitan Hospital, Capital Medical University, Beijing, China
| | - Yanzhuo Zhang
- Department of Molecular Orthopedics, National Center for Orthopaedics, Beijing Research Institute of Traumatology and Orthopaedics, Beijing Jishuitan Hospital, Capital Medical University, Beijing, China
| | - Guangping Li
- National Center for Orthopaedics, Laboratory of Bone Tissue Engineering, Beijing Research Institute of Traumatology and Orthopaedics, Beijing Jishuitan Hospital, Capital Medical University, Beijing, China
| | - Chengai Wu
- Department of Molecular Orthopedics, National Center for Orthopaedics, Beijing Research Institute of Traumatology and Orthopaedics, Beijing Jishuitan Hospital, Capital Medical University, Beijing, China
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Li X, Yao X, Li K, Guo J, Deng K, Liu Z, Yang F, Fan Y, Yang Y, Zhu H, Wang F. CREB1 Is Involved in miR-134-5p-Mediated Endometrial Stromal Cell Proliferation, Apoptosis, and Autophagy. Cells 2023; 12:2554. [PMID: 37947633 PMCID: PMC10649013 DOI: 10.3390/cells12212554] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Revised: 09/17/2023] [Accepted: 10/13/2023] [Indexed: 11/12/2023] Open
Abstract
The successful establishment of endometrial receptivity is a key factor in ensuring the fertility of ewes and their economic benefits. Hu sheep have attracted attention due to their high fecundity and year-round estrus. In this study, we found that in the luteal phase, the uterine gland density, uterine coefficient, and number of uterine caruncles of high-fertility Hu sheep were higher than those of low-fertility Hu sheep. Thousands of differentially expressed genes were identified in the endometrium of Hu sheep with different fertility potential using RNA sequencing (RNA-Seq). Several genes involved in endometrial receptivity were screened using bioinformatics analysis. The qRT-PCR analysis further revealed the differential expression of cAMP reactive element binding protein-1 (CREB1) in the Hu sheep endometrium during the estrous cycle. Functionally, our results suggested that CREB1 significantly affected the expression level of endometrial receptivity marker genes, promoted cell proliferation by facilitating the transition from the G1 phase to the S phase, and inhibited cell apoptosis and autophagy. Moreover, we observed a negative linear correlation between miR-134-5p and CREB1 in the endometrium. In addition, CREB1 overexpression prevented the negative effect of miR-134-5p on endometrial stromal cell (ESC) growth. Taken together, these data indicated that CREB1 was regulated by miR-134-5p and may promote the establishment of uterine receptivity by regulating the function of ESCs. Moreover, this study provides new theoretical references for identifying candidate genes associated with fertility.
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Affiliation(s)
- Xiaodan Li
- Hu Sheep Academy, Nanjing Agricultural University, Nanjing 210095, China; (X.L.)
- Jiangsu Livestock Embryo Engineering Laboratory, Nanjing Agricultural University, Nanjing 210095, China
| | - Xiaolei Yao
- Hu Sheep Academy, Nanjing Agricultural University, Nanjing 210095, China; (X.L.)
- Jiangsu Livestock Embryo Engineering Laboratory, Nanjing Agricultural University, Nanjing 210095, China
| | - Kang Li
- Hu Sheep Academy, Nanjing Agricultural University, Nanjing 210095, China; (X.L.)
- Jiangsu Livestock Embryo Engineering Laboratory, Nanjing Agricultural University, Nanjing 210095, China
| | - Jiahe Guo
- Hu Sheep Academy, Nanjing Agricultural University, Nanjing 210095, China; (X.L.)
- Jiangsu Livestock Embryo Engineering Laboratory, Nanjing Agricultural University, Nanjing 210095, China
| | - Kaiping Deng
- Jiangsu Livestock Embryo Engineering Laboratory, Nanjing Agricultural University, Nanjing 210095, China
| | - Zhipeng Liu
- Jiangsu Livestock Embryo Engineering Laboratory, Nanjing Agricultural University, Nanjing 210095, China
| | - Fan Yang
- Hu Sheep Academy, Nanjing Agricultural University, Nanjing 210095, China; (X.L.)
- Jiangsu Livestock Embryo Engineering Laboratory, Nanjing Agricultural University, Nanjing 210095, China
| | - Yixuan Fan
- Jiangsu Livestock Embryo Engineering Laboratory, Nanjing Agricultural University, Nanjing 210095, China
| | - Yingnan Yang
- Jiangsu Livestock Embryo Engineering Laboratory, Nanjing Agricultural University, Nanjing 210095, China
| | - Huabin Zhu
- Embryo Biotechnology and Reproduction Laboratory, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Feng Wang
- Jiangsu Livestock Embryo Engineering Laboratory, Nanjing Agricultural University, Nanjing 210095, China
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Almansa-Gómez S, Prieto-Ruiz F, Cansado J, Madrid M. Autophagy Modulation as a Potential Therapeutic Strategy in Osteosarcoma: Current Insights and Future Perspectives. Int J Mol Sci 2023; 24:13827. [PMID: 37762129 PMCID: PMC10531374 DOI: 10.3390/ijms241813827] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Revised: 09/04/2023] [Accepted: 09/06/2023] [Indexed: 09/29/2023] Open
Abstract
Autophagy, the process that enables the recycling and degradation of cellular components, is essential for homeostasis, which occurs in response to various types of stress. Autophagy plays an important role in the genesis and evolution of osteosarcoma (OS). The conventional treatment of OS has limitations and is not always effective at controlling the disease. Therefore, numerous researchers have analyzed how controlling autophagy could be used as a treatment or strategy to reverse resistance to therapy in OS. They highlight how the inhibition of autophagy improves the efficacy of chemotherapeutic treatments and how the promotion of autophagy could prove positive in OS therapy. The modulation of autophagy can also be directed against OS stem cells, improving treatment efficacy and preventing cancer recurrence. Despite promising findings, future studies are needed to elucidate the molecular mechanisms of autophagy and its relationship to OS, as well as the mechanisms underlying the functioning of autophagic modulators. Careful evaluation is required as autophagy modulation may have adverse effects on normal cells, and the optimization of autophagic modulators for use as drugs in OS is imperative.
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Affiliation(s)
| | | | - José Cansado
- Yeast Physiology Group, Departamento de Genética y Microbiología, Facultad de Biología, Universidad de Murcia, 30100 Murcia, Spain; (S.A.-G.); (F.P.-R.)
| | - Marisa Madrid
- Yeast Physiology Group, Departamento de Genética y Microbiología, Facultad de Biología, Universidad de Murcia, 30100 Murcia, Spain; (S.A.-G.); (F.P.-R.)
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Zhang J, Xiang Q, Wu M, Lao YZ, Xian YF, Xu HX, Lin ZX. Autophagy Regulators in Cancer. Int J Mol Sci 2023; 24:10944. [PMID: 37446120 PMCID: PMC10341480 DOI: 10.3390/ijms241310944] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Revised: 06/22/2023] [Accepted: 06/27/2023] [Indexed: 07/15/2023] Open
Abstract
Autophagy plays a complex impact role in tumor initiation and development. It serves as a double-edged sword by supporting cell survival in certain situations while also triggering autophagic cell death in specific cellular contexts. Understanding the intricate functions and mechanisms of autophagy in tumors is crucial for guiding clinical approaches to cancer treatment. Recent studies highlight its significance in various aspects of cancer biology. Autophagy enables cancer cells to adapt to and survive unfavorable conditions by recycling cellular components. However, excessive or prolonged autophagy can lead to the self-destruction of cancer cells via a process known as autophagic cell death. Unraveling the molecular mechanisms underlying autophagy regulation in cancer is crucial for the development of targeted therapeutic interventions. In this review, we seek to present a comprehensive summary of current knowledge regarding autophagy, its impact on cancer cell survival and death, and the molecular mechanisms involved in the modulation of autophagy for cancer therapy.
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Affiliation(s)
- Juan Zhang
- School of Chinese Medicine, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR 999077, China; (J.Z.); (Y.-F.X.)
| | - Qian Xiang
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China; (Q.X.); (M.W.); (Y.-Z.L.)
| | - Man Wu
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China; (Q.X.); (M.W.); (Y.-Z.L.)
| | - Yuan-Zhi Lao
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China; (Q.X.); (M.W.); (Y.-Z.L.)
| | - Yan-Fang Xian
- School of Chinese Medicine, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR 999077, China; (J.Z.); (Y.-F.X.)
| | - Hong-Xi Xu
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China; (Q.X.); (M.W.); (Y.-Z.L.)
- Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
| | - Zhi-Xiu Lin
- School of Chinese Medicine, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR 999077, China; (J.Z.); (Y.-F.X.)
- Hong Kong Institute of Integrative Medicine, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR 999077, China
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6
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Yang T, Qu X, Zhao J, Wang X, Wang Q, Dai J, Zhu C, Li J, Jiang L. Macrophage PTEN controls STING-induced inflammation and necroptosis through NICD/NRF2 signaling in APAP-induced liver injury. Cell Commun Signal 2023; 21:160. [PMID: 37370115 DOI: 10.1186/s12964-023-01175-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2023] [Accepted: 05/25/2023] [Indexed: 06/29/2023] Open
Abstract
BACKGROUND Phosphatase and tensin homolog deleted on chromosome 10 (PTEN) signaling has been known to play a critical role in maintaining cellular and tissue homeostasis, which also has an essential role in the inflammatory response. However, it remains unidentified whether and how the macrophage PTEN may govern the innate immune signaling stimulator of interferon genes (STING) mediated inflammation and hepatocyte necroptosis in APAP-induced liver injury (AILI). METHODS Myeloid-specific PTEN knockout (PTENM-KO) and floxed PTEN (PTENFL/FL) mice were treated with APAP (400 mg/kg) or PBS. In a parallel in vitro study, bone marrow-derived macrophages (BMMs) were isolated from these conditional knockout mice and transfected with CRISPR/Cas9-mediated Notch1 knockout (KO) or CRISPR/Cas9-mediated STING activation vector followed by LPS (100 ng/ml) stimulation. RESULTS Here, we report that myeloid-specific PTEN knockout (PTENM-KO) mice were resistant to oxidative stress-induced hepatocellular injury with reduced macrophage/neutrophil accumulation and proinflammatory mediators in AILI. PTENM-KO increased the interaction of nuclear Notch intracellular domain (NICD) and nuclear factor (erythroid-derived 2)-like 2 (NRF2) in the macrophage nucleus, reducing reactive oxygen species (ROS) generation. Mechanistically, it is worth noting that macrophage NICD and NRF2 co-localize within the nucleus under inflammatory conditions. Additionally, Notch1 promotes the interaction of immunoglobulin kappa J region (RBPjκ) with NRF2. Disruption of the Notch1 signal in PTEN deletion macrophages, reduced RBPjκ and NRF2 binding, and activated STING signaling. Moreover, PTENM-KO macrophages with STING activated led to ROS generation and TNF-α release, resulting in hepatocyte necroptosis upon co-culture with primary hepatocytes. CONCLUSIONS Our findings demonstrate that the macrophage PTEN-NICD/NRF2-STING axis is critical to regulating oxidative stress-induced liver inflammation and necroptosis in AILI and implies the therapeutic potential for managing sterile liver inflammation. Video Abstract.
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Affiliation(s)
- Tao Yang
- Department of Infectious Diseases, The First Affiliated Hospital With Nanjing Medical University, Nanjing, China
- Department of Respiratory and Critical Care Medicine, The Affiliated People's Hospital of Jiangsu University, The Zhenjiang Clinical Medical College of Nanjing Medical University, Zhenjiang, China
| | - Xiaoye Qu
- Department of Liver Surgery, Renji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Jiaying Zhao
- Department of Infectious Diseases, The First Affiliated Hospital With Nanjing Medical University, Nanjing, China
| | - Xiao Wang
- Department of Infectious Diseases, The First Affiliated Hospital With Nanjing Medical University, Nanjing, China
| | - Qian Wang
- Department of Infectious Diseases, The First Affiliated Hospital With Nanjing Medical University, Nanjing, China
| | - Jingjing Dai
- Department of Infectious Diseases, The First Affiliated Hospital With Nanjing Medical University, Nanjing, China
| | - Chuanlong Zhu
- Department of Infectious Diseases, The First Affiliated Hospital With Nanjing Medical University, Nanjing, China
| | - Jun Li
- Department of Infectious Diseases, The First Affiliated Hospital With Nanjing Medical University, Nanjing, China.
| | - Longfeng Jiang
- Department of Infectious Diseases, The First Affiliated Hospital With Nanjing Medical University, Nanjing, China.
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Lin C, Traets JJH, Vredevoogd DW, Visser NL, Peeper DS. TSC2 regulates tumor susceptibility to TRAIL-mediated T-cell killing by orchestrating mTOR signaling. EMBO J 2023; 42:e111614. [PMID: 36715448 PMCID: PMC9975943 DOI: 10.15252/embj.2022111614] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2022] [Revised: 12/08/2022] [Accepted: 12/14/2022] [Indexed: 01/31/2023] Open
Abstract
Resistance to cancer immunotherapy continues to impair common clinical benefit. Here, we use whole-genome CRISPR-Cas9 knockout data to uncover an important role for Tuberous Sclerosis Complex 2 (TSC2) in determining tumor susceptibility to cytotoxic T lymphocyte (CTL) killing in human melanoma cells. TSC2-depleted tumor cells had disrupted mTOR regulation following CTL attack, which was associated with enhanced cell death. Wild-type tumor cells adapted to CTL attack by shifting their mTOR signaling balance toward increased mTORC2 activity, circumventing apoptosis, and necroptosis. TSC2 ablation strongly augmented tumor cell sensitivity to CTL attack in vitro and in vivo, suggesting one of its functions is to critically protect tumor cells. Mechanistically, TSC2 inactivation caused elevation of TRAIL receptor expression, cooperating with mTORC1-S6 signaling to induce tumor cell death. Clinically, we found a negative correlation between TSC2 expression and TRAIL signaling in TCGA patient cohorts. Moreover, a lower TSC2 immune response signature was observed in melanomas from patients responding to immune checkpoint blockade. Our study uncovers a pivotal role for TSC2 in the cancer immune response by governing crosstalk between TSC2-mTOR and TRAIL signaling, aiding future therapeutic exploration of this pathway in immuno-oncology.
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Affiliation(s)
- Chun‐Pu Lin
- Division of Molecular Oncology and ImmunologyOncode Institute, The Netherlands Cancer InstituteAmsterdamThe Netherlands
| | - Joleen J H Traets
- Division of Molecular Oncology and ImmunologyOncode Institute, The Netherlands Cancer InstituteAmsterdamThe Netherlands
- Division of Tumor Biology and ImmunologyThe Netherlands Cancer InstituteAmsterdamThe Netherlands
| | - David W Vredevoogd
- Division of Molecular Oncology and ImmunologyOncode Institute, The Netherlands Cancer InstituteAmsterdamThe Netherlands
| | - Nils L Visser
- Division of Molecular Oncology and ImmunologyOncode Institute, The Netherlands Cancer InstituteAmsterdamThe Netherlands
| | - Daniel S Peeper
- Division of Molecular Oncology and ImmunologyOncode Institute, The Netherlands Cancer InstituteAmsterdamThe Netherlands
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Wang L, Wang F, Liu K, Long C, Chen Y, Li C, Li L, Liu F, Zhang X, Jing Y, Wang Y, Liang A, Yan H, Zhang H. αB-crystallin/HSPB2 is critical for hyperactive mTOR-induced cardiomyopathy. J Cell Physiol 2021; 236:8110-8121. [PMID: 34101831 DOI: 10.1002/jcp.30465] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2021] [Revised: 04/24/2021] [Accepted: 05/26/2021] [Indexed: 11/09/2022]
Abstract
Even though aberrant mechanistic target of rapamycin (mTOR) signaling is known to cause cardiomyopathy, its underlying mechanism remains poorly understood. Because augmentation of αB-crystallin and hspB2 was presented in the cortical tubers and lymphangioleiomyomatosis of tuberous sclerosis complex patients, we deciphered the role of αB-crystallin and its adjacent duplicate gene, hspB2, in hyperactive mTOR-induced cardiomyopathy. Cardiac Tsc1 deletion (T1-hKO) caused mouse mTOR activation and cardiomyopathy. Overexpression of αB-crystallin and hspB2 was presented in the hearts of these mice. Knockout of αB-crystallin/hspB2 reversed deficient Tsc1-mediated fetal gene expression, mTOR activation, mitochondrial damage, cardiomyocyte vacuolar degeneration, cardiomyocyte size, and fibrosis of T1-hKO mice. These cardiac-Tsc1; αB-crystallin; hspB2 triple knockout (tKO) mice had improved cardiac function, smaller heart weight to body weight ratio, and reduced lethality compared with T1-hKO mice. Even though activated mTOR suppressed autophagy in T1-hKO mice, ablation of αB-crystallin and hspB2 failed to restore autophagy in tKO mice. mTOR inhibitors suppressed αB-crystallin expression in T1-hKO mice and rat cardiomyocyte line H9C2. Starvation of H9C2 cells activated autophagy and suppressed αB-crystallin expression. Since inhibition of autophagy restored αB-crystallin expression in starved H9C2 cells, autophagy is a negative regulator of αB-crystallin expression. mTOR thus stimulates αB-crystallin expression through suppression of autophagy. In conclusion, αB-crystallin and hspB2 play a pivotal role in Tsc1 knockout-related cardiomyopathy and are therapeutic targets of hyperactive mTOR-associated cardiomyopathy.
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Affiliation(s)
- Lianmei Wang
- State Key Laboratory of Medical Molecular Biology, Department of Physiology, Institute of Basic Medical Sciences and School of Basic Medicine, Graduate School of Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, China
- Safety Research Center of Injectable Chinese Medicine, Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, China
| | - Fang Wang
- State Key Laboratory of Medical Molecular Biology, Department of Physiology, Institute of Basic Medical Sciences and School of Basic Medicine, Graduate School of Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, China
| | - Kemei Liu
- Department of Cardiovascular Medicine, The Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
- Department of Coronary Heart Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Caifeng Long
- State Key Laboratory of Medical Molecular Biology, Department of Physiology, Institute of Basic Medical Sciences and School of Basic Medicine, Graduate School of Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, China
| | - Yi Chen
- Department of Coronary Heart Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Chunjia Li
- State Key Laboratory of Medical Molecular Biology, Department of Physiology, Institute of Basic Medical Sciences and School of Basic Medicine, Graduate School of Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, China
| | - Li Li
- State Key Laboratory of Medical Molecular Biology, Department of Physiology, Institute of Basic Medical Sciences and School of Basic Medicine, Graduate School of Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, China
| | - Fangming Liu
- State Key Laboratory of Medical Molecular Biology, Department of Physiology, Institute of Basic Medical Sciences and School of Basic Medicine, Graduate School of Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, China
| | - Xinyu Zhang
- State Key Laboratory of Medical Molecular Biology, Department of Physiology, Institute of Basic Medical Sciences and School of Basic Medicine, Graduate School of Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, China
| | - Yanling Jing
- State Key Laboratory of Medical Molecular Biology, Department of Physiology, Institute of Basic Medical Sciences and School of Basic Medicine, Graduate School of Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, China
| | - Yanan Wang
- State Key Laboratory of Medical Molecular Biology, Department of Physiology, Institute of Basic Medical Sciences and School of Basic Medicine, Graduate School of Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, China
| | - Aihua Liang
- Safety Research Center of Injectable Chinese Medicine, Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, China
| | - Hongbing Yan
- Department of Coronary Heart Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
- Department of Coronary Heart Disease, Fuwai Hospital, Chinese Academy of Medical Sciences, Shenzhen, China
| | - Hongbing Zhang
- State Key Laboratory of Medical Molecular Biology, Department of Physiology, Institute of Basic Medical Sciences and School of Basic Medicine, Graduate School of Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, China
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Wang Y, Li C, Zhang Y, Zha X, Zhang H, Hu Z, Wu C. Aberrant mTOR/autophagy/Nurr1 signaling is critical for TSC-associated tumor development. Biochem Cell Biol 2021; 99:570-577. [PMID: 34463540 DOI: 10.1139/bcb-2021-0017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Tuberous sclerosis complex (TSC), an inherited neurocutaneous disease, is caused by mutations in either the TSC1 or TSC2 gene. This genetic disorder is characterized by the growth of benign tumors in the brain, kidneys, and other organs. As a member of the orphan nuclear receptor family, nuclear receptor related 1 (Nurr1) plays a vital role in some neuropathological diseases and several types of benign or malignant tumors. Here, we explored the potential regulatory role of TSC1/2 signaling in Nurr1 and the effect of Nurr1 in TSC-related tumors. We found that Nurr1 expression was drastically decreased by the disruption of the TSC1/2 complex in Tsc2-null cells, genetically modified mouse models of TSC, cortical tubers of TSC patients, and kidney tumor tissue obtained from a TSC patient. Deficient TSC1/2 complex downregulated Nurr1 expression in an mTOR-dependent manner. Moreover, hyperactivation of mTOR reduced Nurr1 expression via suppression of autophagy. In addition, Nurr1 overexpression inhibited cell proliferation and suppressed cell cycle progression. Therefore, TSC/mTOR/autophagy/Nurr1 signaling is partially responsible for the tumorigenesis of TSC. Taken together, Nurr1 may be a novel therapeutic target for TSC-associated tumors, and Nurr1 agonists or reagents that induce Nurr1 expression may be used for the treatment of TSC.
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Affiliation(s)
- Ying Wang
- Department of Molecular Orthopaedics, Beijing Research Institute of Traumatology and Orthopaedics, Beijing Jishuitan Hospital, Beijing 100035, China
| | - Chunjia Li
- Department of Rheumatology, China-Japan Friendship Hospital, Beijing 100029, China
| | - Yanzhuo Zhang
- Department of Molecular Orthopaedics, Beijing Research Institute of Traumatology and Orthopaedics, Beijing Jishuitan Hospital, Beijing 100035, China
| | - Xiaojun Zha
- Department of Biochemistry & Molecular Biology, School of Basic Medicine, Anhui Medical University, Hefei, Anhui 230032, China
| | - Hongbing Zhang
- State Key Laboratory of Medical Molecular Biology, Department of Physiology, Institute of Basic Medical Sciences and School of Basic Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100005, China
| | - Zhongdong Hu
- Modern Research Center for Traditional Chinese Medicine, School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 100029, China
| | - Chengai Wu
- Department of Molecular Orthopaedics, Beijing Research Institute of Traumatology and Orthopaedics, Beijing Jishuitan Hospital, Beijing 100035, China
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10
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Niranjan R, Mishra KP, Tripathi SN, Thakur AK. Proliferation of Lung Epithelial Cells Is Regulated by the Mechanisms of Autophagy Upon Exposure of Soots. Front Cell Dev Biol 2021; 9:662597. [PMID: 34368122 PMCID: PMC8335634 DOI: 10.3389/fcell.2021.662597] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Accepted: 06/14/2021] [Indexed: 11/13/2022] Open
Abstract
Background Soots are known to cause many diseases in humans, but their underlying mechanisms of toxicity are still not known. Here, we report that soots induce cell proliferation of lung epithelial cells via modulating autophagy pathways. Results Fullerene soot and diesel exhaust particles (DEP) induced cell proliferation of lung epithelial, A549 cells via distinct autophagic mechanisms and did not cause cell death. Exposure of fullerene soot protected the cell death of A549 cells, caused by hydrogen peroxide, and inhibited LPS-induced autophagy. Fullerene soot co-localized with the autophagic proteins and inhibited starvation-induced autophagy (downregulated ATG-5, beclin-1, p62, and LC3 expressions) independent of its antioxidant properties. Similarly, it decreased the expression profile of autophagic genes and upregulated the proliferation-responsive gene, Ki-67, in mice. We observed that expressions of fullerene soot-responsive genes (Beclin-1, ATG-5, and p62) were reverted by Akt Inhibitor X, indicating an important role of the Akt pathway. At an elemental level, we found that elemental carbon of fullerene soot may be converted into organic carbon, as measured by OCEC, which may point fullerene soot as a source of carbon. On the other hand, DEP upregulated the expressions of autophagy genes. Akt Inhibitor X did not attenuate DEP-induced cell proliferation and autophagic response. However, an autophagic inhibitor, chloroquine, and significantly inhibited DEP-induced cell proliferation. Conclusion It can be said that distinct autophagic mechanisms are operational in cell proliferation of lung epithelial cells due to soots, which may be responsible for different diseases. Understanding the mechanism of these pathways provides some important targets, which can be utilized for the development of future therapeutics.
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Affiliation(s)
- Rituraj Niranjan
- Laboratory 6, Department of Biological Sciences and Bioengineering (BSBE), Indian Institute of Technology, Kanpur, India.,Talent Search Scientist (TSS-ICMR), currently at, Immunology Laboratory, ICMR-Vector Control Research Centre, Puducherry, India
| | - Kaushal Prasad Mishra
- Laboratory 6, Department of Biological Sciences and Bioengineering (BSBE), Indian Institute of Technology, Kanpur, India
| | - Sachchida Nand Tripathi
- Department of Civil Engineering, Centre for Environmental Science and Engineering, Indian Institute of Technology Kanpur, Kanpur, India
| | - Ashwani Kumar Thakur
- Laboratory 6, Department of Biological Sciences and Bioengineering (BSBE), Indian Institute of Technology, Kanpur, India
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11
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Li C, Li Z, Song L, Meng L, Xu G, Zhang H, Hu J, Li F, Liu C. GEFT Inhibits Autophagy and Apoptosis in Rhabdomyosarcoma via Activation of the Rac1/Cdc42-mTOR Signaling Pathway. Front Oncol 2021; 11:656608. [PMID: 34221974 PMCID: PMC8252888 DOI: 10.3389/fonc.2021.656608] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Accepted: 05/20/2021] [Indexed: 12/12/2022] Open
Abstract
Autophagy and apoptosis are dynamic processes that determine the fate of cells, and regulating these processes can treat cancer. GEFT is highly expressed in rhabdomyosarcoma (RMS), which accelerates the tumorigenicity and metastasis of RMS by activating Rac1/Cdc42 signaling, but the regulatory mechanisms of autophagy and apoptosis are unclear. In our study, we found that the RMS tissues had high Rac1, Cdc42, mTOR, and Bcl-2 expression levels and low Beclin1, LC3, and Bax expression levels compared with the normal striated muscle tissues (P < 0.05). In addition, multivariate analysis has proven that Rac1 is an independent prognostic factor (P < 0.05), and the high expression level of the Beclin1 protein was closely associated with the tumor diameter of the RMS patients (P = 0.044), whereas the high expression level of the LC3 protein was associated with the clinical stage of the RMS patients (P = 0.027). Furthermore, GEFT overexpression could inhibit autophagy and apoptosis in RMS. A Rac1/Cdc42 inhibitor was added, and the inhibition of autophagy and apoptosis decreased. Rac1 and Cdc42 could regulate mTOR to inhibit autophagy and apoptosis in RMS. Overall, these studies demonstrated that the GEFT–Rac1/Cdc42–mTOR pathway can inhibit autophagy and apoptosis in RMS and provide evidence for innovative treatments.
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Affiliation(s)
- Chunsen Li
- Department of Pathology and Key Laboratory for Xinjiang Endemic and Ethnic Diseases, Shihezi University School of Medicine, Shihezi, China
| | - Zhenzhen Li
- Department of Pathology and Key Laboratory for Xinjiang Endemic and Ethnic Diseases, Shihezi University School of Medicine, Shihezi, China
| | - Lingxie Song
- Department of Pathology and Key Laboratory for Xinjiang Endemic and Ethnic Diseases, Shihezi University School of Medicine, Shihezi, China.,Department of Pathology and Medical Research Center, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China
| | - Lian Meng
- Department of Pathology and Key Laboratory for Xinjiang Endemic and Ethnic Diseases, Shihezi University School of Medicine, Shihezi, China
| | - Guixuan Xu
- Department of Pathology and Key Laboratory for Xinjiang Endemic and Ethnic Diseases, Shihezi University School of Medicine, Shihezi, China
| | - Haijun Zhang
- Department of Pathology and Key Laboratory for Xinjiang Endemic and Ethnic Diseases, Shihezi University School of Medicine, Shihezi, China
| | - Jianming Hu
- Department of Pathology and Key Laboratory for Xinjiang Endemic and Ethnic Diseases, Shihezi University School of Medicine, Shihezi, China
| | - Feng Li
- Department of Pathology and Key Laboratory for Xinjiang Endemic and Ethnic Diseases, Shihezi University School of Medicine, Shihezi, China.,Department of Pathology and Medical Research Center, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China
| | - Chunxia Liu
- Department of Pathology and Key Laboratory for Xinjiang Endemic and Ethnic Diseases, Shihezi University School of Medicine, Shihezi, China.,Department of Pathology, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
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12
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Sun T, Hu Y, He W, Shang Y, Yang X, Gong L, Zhang X, Gong P, Yang G. SRT2183 impairs ovarian cancer by facilitating autophagy. Aging (Albany NY) 2020; 12:24208-24218. [PMID: 33223507 PMCID: PMC7762476 DOI: 10.18632/aging.104126] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Accepted: 09/04/2020] [Indexed: 05/13/2023]
Abstract
The 5-year survival rate of ovarian cancer patients is only 47%, and developing novel drugs for ovarian cancer is needed. Herein, we evaluated if and how SRT2183, a sirtuin-1 activator, impairs the ovarian cancer cells. OVCAR-3 and A2780 cells were treated with SRT2183. Cell viability was measured by cell counting kit-8 assay and clonogenic assay. Apoptosis was determined by flow cytometry with Annexin V and propidium iodide. The level of autophagy was evaluated by western blot and immunofluorescence. The activities of AKT/mTOR/70s6k and MAPK signaling pathway were measured by immunoblot. SRT2183 inhibited the growth of ovarian cancer cells, increased the accumulation of BAX, cleaved-caspase 3 and cleaved-PARP, and decreased the level of anti-apoptotic Bcl-2 and Mcl-1. SRT2183 increased the LC3II level, and enhanced the degradation of p62/SQSTM1. SRT2183 increased the formation of GFP-LC3 puncta and induced the maturation of autophagosome. Interestingly, knockdown of autophagy related 5 and 7 significantly impaired the anti-carcinoma activity of SRT2183, implying that SRT2183 impaired the ovarian cancer cells by inducing autophagy. SRT2183 decreased the accumulation of p-Akt, p-mTOR and p-70s6k, and activated the p38 MAPK signaling pathway. This indicated that Akt/mTOR/70s6k and p38 MAPK signaling pathway might be involved in the SRT2183-mediated autophagy and apoptosis.
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Affiliation(s)
- Tingting Sun
- Department of Gynecology, First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, China
| | - Yanfen Hu
- Discovery Department, Elpiscience Biopharma Ltd., Shanghai 201203, China
| | - Weipeng He
- Department of Gynecology, First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, China
| | - Yuru Shang
- Department of Plastic Surgery, Shenzhen University General Hospital and Shenzhen University Clinical Medical Academy, Shenzhen 518055, China
| | - Xiaohong Yang
- Department of Biochemistry and Molecular Biology, Shenzhen University Health Science Center, Shenzhen 518060, China
| | - Liyun Gong
- Department of Biochemistry and Molecular Biology, Shenzhen University Health Science Center, Shenzhen 518060, China
| | - Xianbin Zhang
- Department of General Surgery and Carson International Cancer Research Center, Shenzhen University General Hospital and Shenzhen University Clinical Medical Academy, Shenzhen 518055, China
- Guangdong Key Laboratory for Biomedical Measurements and Ultrasound Imaging, School of Biomedical Engineering, Shenzhen University Health Science Center, Shenzhen 518060, China
- Guangdong Key Laboratory of Regional Immunity and Diseases, Shenzhen University Health Science Center, Shenzhen 518060, China
| | - Peng Gong
- Department of General Surgery and Carson International Cancer Research Center, Shenzhen University General Hospital and Shenzhen University Clinical Medical Academy, Shenzhen 518055, China
- Guangdong Key Laboratory of Regional Immunity and Diseases, Shenzhen University Health Science Center, Shenzhen 518060, China
| | - Guofen Yang
- Department of Gynecology, First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, China
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13
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Guo Y, Wang C, Jiang M, Zhu H, Weng M, Sun L, Zhang Y. Baohuoside I via mTOR Apoptotic Signaling to Inhibit Glioma Cell Growth. Cancer Manag Res 2020; 12:11435-11444. [PMID: 33204156 PMCID: PMC7667174 DOI: 10.2147/cmar.s265803] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Accepted: 09/24/2020] [Indexed: 12/12/2022] Open
Abstract
Introduction Baohuoside I, a novel oncotherapeutic agent, has been reported to have anti-cancer effects on a variety of cancers, but its role in glioma and its molecular mechanism are still unclear. Methods The proliferation of U251 cells was detected by real-time cellular analysis (RTCA), CCK-8, Ki67 immunofluorescence and colony formation assay. The effect of Baohuoside I on the invasion and migration of U251 cells was measured by transwell and scratch tests. The apoptosis of U251 cells was detected by flow cytometry. The expression level of related protein was detected by western blotting. Results Baohuoside I could inhibit the proliferation of human glioma cells and induce apoptosis. Further study showed that the migration and invasion ability of glioma was significantly decreased by Baohuoside I. Western blot revealed the expression of p-AMPKα1 protein was up-regulated, and the expression of p-mTOR and p-S6K was down-regulated after Baohuoside I treatment. Tumorigenesis in nude mice showed that Baohuoside I had an anti-glioma effect in vivo. Conclusion We propose a natural product, which can inhibit the proliferation, invasion and migration of glioma and may be a valuable anti-tumor candidate. The inhibitory effect of Baohuoside I on the glioma is achieved by inducing the apoptosis of the tumor cells, rather than autophagy. In addition, the pathway to induce cell apoptosis of Baohuoside I is to target the mTOR signal.
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Affiliation(s)
- Yangyang Guo
- Key Laboratory of Diagnosis and Treatment of Severe Hepato-Pancreatic Diseases of Zhejiang Province, Zhejiang Provincial Top Key Discipline in Surgery, Wenzhou Medical University First Affiliated Hospital, Wenzhou, Zhejiang, People's Republic of China
| | - Cheng Wang
- Key Laboratory of Diagnosis and Treatment of Severe Hepato-Pancreatic Diseases of Zhejiang Province, Zhejiang Provincial Top Key Discipline in Surgery, Wenzhou Medical University First Affiliated Hospital, Wenzhou, Zhejiang, People's Republic of China
| | - Minghui Jiang
- Key Laboratory of Diagnosis and Treatment of Severe Hepato-Pancreatic Diseases of Zhejiang Province, Zhejiang Provincial Top Key Discipline in Surgery, Wenzhou Medical University First Affiliated Hospital, Wenzhou, Zhejiang, People's Republic of China
| | - Hengyue Zhu
- Key Laboratory of Diagnosis and Treatment of Severe Hepato-Pancreatic Diseases of Zhejiang Province, Zhejiang Provincial Top Key Discipline in Surgery, Wenzhou Medical University First Affiliated Hospital, Wenzhou, Zhejiang, People's Republic of China
| | - Min Weng
- Key Laboratory of Diagnosis and Treatment of Severe Hepato-Pancreatic Diseases of Zhejiang Province, Zhejiang Provincial Top Key Discipline in Surgery, Wenzhou Medical University First Affiliated Hospital, Wenzhou, Zhejiang, People's Republic of China
| | - Linxiao Sun
- Key Laboratory of Diagnosis and Treatment of Severe Hepato-Pancreatic Diseases of Zhejiang Province, Zhejiang Provincial Top Key Discipline in Surgery, Wenzhou Medical University First Affiliated Hospital, Wenzhou, Zhejiang, People's Republic of China
| | - Yanlei Zhang
- Neurology Department, Wenzhou Medical University First Affiliated Hospital, Wenzhou, Zhejiang, People's Republic of China
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14
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Russell KL, Gorgulho CM, Allen A, Vakaki M, Wang Y, Facciabene A, Lee D, Roy P, Buchser WJ, Appleman LJ, Maranchie J, Storkus WJ, Lotze MT. Inhibiting Autophagy in Renal Cell Cancer and the Associated Tumor Endothelium. ACTA ACUST UNITED AC 2020; 25:165-177. [PMID: 31135523 PMCID: PMC10395074 DOI: 10.1097/ppo.0000000000000374] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The clear cell subtype of kidney cancer encompasses most renal cell carcinoma cases and is associated with the loss of von Hippel-Lindau gene function or expression. Subsequent loss or mutation of the other allele influences cellular stress responses involving nutrient and hypoxia sensing. Autophagy is an important regulatory process promoting the disposal of unnecessary or degraded cellular components, tightly linked to almost all cellular processes. Organelles and proteins that become damaged or that are no longer needed in the cell are sequestered and digested in autophagosomes upon fusing with lysosomes, or alternatively, released via vesicular exocytosis. Tumor development tends to disrupt the regulation of the balance between this process and apoptosis, permitting prolonged cell survival and increased replication. Completed trials of autophagic inhibitors using hydroxychloroquine in combination with other anticancer agents including rapalogues and high-dose interleukin 2 have now been reported. The complex nature of autophagy and the unique biology of clear cell renal cell carcinoma warrant further understanding to better develop the next generation of relevant anticancer agents.
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Affiliation(s)
| | | | - Abigail Allen
- Bioengineering, University of Pittsburgh, Pittsburgh, PA
| | | | | | - Andrea Facciabene
- Department of Radiation Oncology, University of Pennsylvania, Philadelphia, PA
| | | | - Partha Roy
- Bioengineering, University of Pittsburgh, Pittsburgh, PA
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15
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Zhao Y, Wu H, Xing X, Ma Y, Ji S, Xu X, Zhao X, Wang S, Jiang W, Fang C, Zhang L, Yan F, Wang X. CD13 Induces Autophagy to Promote Hepatocellular Carcinoma Cell Chemoresistance Through the P38/Hsp27/CREB/ATG7 Pathway. J Pharmacol Exp Ther 2020; 374:512-520. [PMID: 32571958 DOI: 10.1124/jpet.120.265637] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2020] [Accepted: 06/17/2020] [Indexed: 12/13/2022] Open
Abstract
The chemoresistance of hepatocellular carcinoma (HCC) is a serious problem that directly hinders the effect of chemotherapeutic agents. We previously reported that Aminopeptidase N (CD13) inhibition can enhance the cytotoxic efficacy of chemotherapy agents. In the present study, we use liver cancer cells to explore the molecular mechanism accounting for the relationship between CD13 and chemoresistance. We demonstrate that CD13 overexpression activates the P38/heat shock protein 27/cAMP response element-binding protein (CREB) signaling pathway to limit the efficacy of cytotoxic agents. Moreover, blockade of P38 or CREB sensitizes HCC cells to 5-fluorouracil. Then we reveal that CREB binds to the autophagy related 7 (ATG7) promoter to induce autophagy and promote HCC cell chemoresistance. CD13 inhibition also downregulates the expression of ATG7, autophagy, and tumor cell growth in vivo. Overall, the combination a CD13 inhibitor and chemotherapeutic agents may be a potential strategy for overcoming drug resistance in HCC. SIGNIFICANCE STATEMENT: Our study demonstrates that Aminopeptidase N (CD13) promotes hepatocellular carcinoma (HCC) cell chemoresistance via the P38/heat shock protein 27/cAMP response element-binding protein (CREB) pathway. CREB regulates autophagy related 7 transcription and expression to induce autophagy. Our results collectively suggest that CD13 may serve as a potential target for overcoming HCC resistance.
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Affiliation(s)
- Yan Zhao
- School of Pharmacy, Weifang Medical University, Weifang, Shandong, China (Y.Z., H.W., X.Xi., Y.M., S.J., X.Xu., X.Z., S.W., W.J., C.F., L.Z., F.Y., X.W.) and Department of pharmacy, Southwestern Lu Hospital, Liaocheng, Shandong, China (H.W.)
| | - Huina Wu
- School of Pharmacy, Weifang Medical University, Weifang, Shandong, China (Y.Z., H.W., X.Xi., Y.M., S.J., X.Xu., X.Z., S.W., W.J., C.F., L.Z., F.Y., X.W.) and Department of pharmacy, Southwestern Lu Hospital, Liaocheng, Shandong, China (H.W.)
| | - Xiaoyan Xing
- School of Pharmacy, Weifang Medical University, Weifang, Shandong, China (Y.Z., H.W., X.Xi., Y.M., S.J., X.Xu., X.Z., S.W., W.J., C.F., L.Z., F.Y., X.W.) and Department of pharmacy, Southwestern Lu Hospital, Liaocheng, Shandong, China (H.W.)
| | - Yuqian Ma
- School of Pharmacy, Weifang Medical University, Weifang, Shandong, China (Y.Z., H.W., X.Xi., Y.M., S.J., X.Xu., X.Z., S.W., W.J., C.F., L.Z., F.Y., X.W.) and Department of pharmacy, Southwestern Lu Hospital, Liaocheng, Shandong, China (H.W.)
| | - Shengping Ji
- School of Pharmacy, Weifang Medical University, Weifang, Shandong, China (Y.Z., H.W., X.Xi., Y.M., S.J., X.Xu., X.Z., S.W., W.J., C.F., L.Z., F.Y., X.W.) and Department of pharmacy, Southwestern Lu Hospital, Liaocheng, Shandong, China (H.W.)
| | - Xinyue Xu
- School of Pharmacy, Weifang Medical University, Weifang, Shandong, China (Y.Z., H.W., X.Xi., Y.M., S.J., X.Xu., X.Z., S.W., W.J., C.F., L.Z., F.Y., X.W.) and Department of pharmacy, Southwestern Lu Hospital, Liaocheng, Shandong, China (H.W.)
| | - Xin Zhao
- School of Pharmacy, Weifang Medical University, Weifang, Shandong, China (Y.Z., H.W., X.Xi., Y.M., S.J., X.Xu., X.Z., S.W., W.J., C.F., L.Z., F.Y., X.W.) and Department of pharmacy, Southwestern Lu Hospital, Liaocheng, Shandong, China (H.W.)
| | - Sensen Wang
- School of Pharmacy, Weifang Medical University, Weifang, Shandong, China (Y.Z., H.W., X.Xi., Y.M., S.J., X.Xu., X.Z., S.W., W.J., C.F., L.Z., F.Y., X.W.) and Department of pharmacy, Southwestern Lu Hospital, Liaocheng, Shandong, China (H.W.)
| | - Wenyan Jiang
- School of Pharmacy, Weifang Medical University, Weifang, Shandong, China (Y.Z., H.W., X.Xi., Y.M., S.J., X.Xu., X.Z., S.W., W.J., C.F., L.Z., F.Y., X.W.) and Department of pharmacy, Southwestern Lu Hospital, Liaocheng, Shandong, China (H.W.)
| | - Chunyan Fang
- School of Pharmacy, Weifang Medical University, Weifang, Shandong, China (Y.Z., H.W., X.Xi., Y.M., S.J., X.Xu., X.Z., S.W., W.J., C.F., L.Z., F.Y., X.W.) and Department of pharmacy, Southwestern Lu Hospital, Liaocheng, Shandong, China (H.W.)
| | - Lei Zhang
- School of Pharmacy, Weifang Medical University, Weifang, Shandong, China (Y.Z., H.W., X.Xi., Y.M., S.J., X.Xu., X.Z., S.W., W.J., C.F., L.Z., F.Y., X.W.) and Department of pharmacy, Southwestern Lu Hospital, Liaocheng, Shandong, China (H.W.)
| | - Fang Yan
- School of Pharmacy, Weifang Medical University, Weifang, Shandong, China (Y.Z., H.W., X.Xi., Y.M., S.J., X.Xu., X.Z., S.W., W.J., C.F., L.Z., F.Y., X.W.) and Department of pharmacy, Southwestern Lu Hospital, Liaocheng, Shandong, China (H.W.)
| | - Xuejian Wang
- School of Pharmacy, Weifang Medical University, Weifang, Shandong, China (Y.Z., H.W., X.Xi., Y.M., S.J., X.Xu., X.Z., S.W., W.J., C.F., L.Z., F.Y., X.W.) and Department of pharmacy, Southwestern Lu Hospital, Liaocheng, Shandong, China (H.W.)
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16
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Perez-Gomez R, Magnin V, Mihajlovic Z, Slaninova V, Krejci A. Downregulation of respiratory complex I mediates major signalling changes triggered by TOR activation. Sci Rep 2020; 10:4401. [PMID: 32157127 PMCID: PMC7064613 DOI: 10.1038/s41598-020-61244-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Accepted: 02/05/2020] [Indexed: 12/20/2022] Open
Abstract
Mitochondrial dysfunctions belong amongst the most common metabolic diseases but the signalling networks that lead to the manifestation of a disease phenotype are often not well understood. We identified the subunits of respiratory complex I, III and IV as mediators of major signalling changes during Drosophila wing disc development. Their downregulation in larval wing disc leads to robust stimulation of TOR activity, which in turn orchestrates a complex downstream signalling network. Specifically, after downregulation of the complex I subunit ND-49 (mammalian NDUFS2), TOR activates JNK to induce cell death and ROS production essential for the stimulation of compensatory apoptosis-induced proliferation within the tissue. Additionally, TOR upregulates Notch and JAK/STAT signalling and it directs glycolytic switch of the target tissue. Our results highlight the central role of TOR signalling in mediating the complex response to mitochondrial respiratory dysfunction and they provide a rationale why the disease symptoms associated with respiratory dysfunctions are often alleviated by mTOR inhibitors.
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Affiliation(s)
- Raquel Perez-Gomez
- Czech Academy of Sciences, Biology Centre, Institute of Entomology, Ceske Budejovice, Czech Republic.,University of South Bohemia, Faculty of Science, Ceske Budejovice, Czech Republic
| | - Valentina Magnin
- Czech Academy of Sciences, Biology Centre, Institute of Entomology, Ceske Budejovice, Czech Republic.,University of South Bohemia, Faculty of Science, Ceske Budejovice, Czech Republic
| | - Zorana Mihajlovic
- Czech Academy of Sciences, Biology Centre, Institute of Entomology, Ceske Budejovice, Czech Republic.,University of South Bohemia, Faculty of Science, Ceske Budejovice, Czech Republic
| | - Vera Slaninova
- Czech Academy of Sciences, Biology Centre, Institute of Entomology, Ceske Budejovice, Czech Republic.,University of South Bohemia, Faculty of Science, Ceske Budejovice, Czech Republic
| | - Alena Krejci
- Czech Academy of Sciences, Biology Centre, Institute of Entomology, Ceske Budejovice, Czech Republic. .,University of South Bohemia, Faculty of Science, Ceske Budejovice, Czech Republic.
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17
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Zhao Z, Liu H, Guo D. Aliskiren attenuates cardiac dysfunction by modulation of the mTOR and apoptosis pathways. ACTA ACUST UNITED AC 2020; 53:e8793. [PMID: 31994601 PMCID: PMC6984373 DOI: 10.1590/1414-431x20198793] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2019] [Accepted: 10/21/2019] [Indexed: 02/06/2023]
Abstract
Aliskiren (ALS) is well known for its antihypertensive properties. However, the potential underlying the molecular mechanism and the anti-hypertrophic effect of ALS have not yet been fully elucidated. The aim of the present study was to investigate the role of ALS in mammalian target of rapamycin (mTOR) and apoptosis signaling using in vivo and in vitro models of cardiac hypertrophy. A rat model of cardiac hypertrophy was induced by isoproterenol treatment (5 mg·kg-1·day-1) for 4 weeks, with or without ALS treatment at 20 mg·kg-1·day-1. The expression of hypertrophic, fibrotic, and apoptotic markers was determined by RT-qPCR. The protein expression of apoptotic markers mTOR and p-mTOR was assessed by western blot analysis. The proliferation of H9C2 cells was monitored using the MTS assay. Cell apoptosis was analyzed using flow cytometry. In vivo, isoproterenol-treated rats exhibited worse cardiac function, whereas ALS treatment reversed these dysfunctions, which were associated with changes in p-mTOR, Bcl-2, Bax, and cleaved caspase-3 expression, as well as the number of apoptotic cells. In vitro, H9C2 cardiomyocyte viability was significantly inhibited and cardiac hypertrophy was induced by Ang II administration, but ALS reversed Ang II-induced H9C2 cardiomyocyte hypertrophy and death. Furthermore, Ang II triggered the activation of the mTOR and apoptosis pathways in hypertrophic cardiomyocytes that were inhibited by ALS treatment. These results indicated that ALS alleviated cardiac hypertrophy through inhibition of the mTOR and apoptosis pathways in cardiomyocytes.
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Affiliation(s)
- Zhengbo Zhao
- Department of Cardiovascular Medicine, Jiulongpo District People's Hospital, Chongqing, China
| | - Han Liu
- Department of Neurology, Jiulongpo District People's Hospital, Chongqing, China
| | - Dongmei Guo
- Department of Cardiovascular Medicine, Nanchuan District People's Hospital, Chongqing, China
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18
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Maidarti M, Anderson RA, Telfer EE. Crosstalk between PTEN/PI3K/Akt Signalling and DNA Damage in the Oocyte: Implications for Primordial Follicle Activation, Oocyte Quality and Ageing. Cells 2020; 9:E200. [PMID: 31947601 PMCID: PMC7016612 DOI: 10.3390/cells9010200] [Citation(s) in RCA: 91] [Impact Index Per Article: 22.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Revised: 01/06/2020] [Accepted: 01/13/2020] [Indexed: 12/18/2022] Open
Abstract
The preservation of genome integrity in the mammalian female germline from primordial follicle arrest to activation of growth to oocyte maturation is fundamental to ensure reproductive success. As oocytes are formed before birth and may remain dormant for many years, it is essential that defence mechanisms are monitored and well maintained. The phosphatase and tensin homolog of chromosome 10 (PTEN)/phosphatidylinositol 3-kinase (PI3K)/protein kinase B (PKB, Akt) is a major signalling pathway governing primordial follicle recruitment and growth. This pathway also contributes to cell growth, survival and metabolism, and to the maintenance of genomic integrity. Accelerated primordial follicle activation through this pathway may result in a compromised DNA damage response (DDR). Additionally, the distinct DDR mechanisms in oocytes may become less efficient with ageing. This review considers DNA damage surveillance mechanisms and their links to the PTEN/PI3K/Akt signalling pathway, impacting on the DDR during growth activation of primordial follicles, and in ovarian ageing. Targeting DDR mechanisms within oocytes may be of value in developing techniques to protect ovaries against chemotherapy and in advancing clinical approaches to regulate primordial follicle activation.
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Affiliation(s)
- Mila Maidarti
- MRC Centre for Reproductive Health, Queens Medical Research Institute, University of Edinburgh, Edinburgh EH16 4TJ, UK; (M.M.); (R.A.A.)
- Institute of Cell Biology, University of Edinburgh, Edinburgh EH9 3FF, UK
- Obstetrics and Gynaecology Department, Faculty of Medicine, Universitas Indonesia, Jakarta 10430, Indonesia
| | - Richard A. Anderson
- MRC Centre for Reproductive Health, Queens Medical Research Institute, University of Edinburgh, Edinburgh EH16 4TJ, UK; (M.M.); (R.A.A.)
| | - Evelyn E. Telfer
- Institute of Cell Biology, University of Edinburgh, Edinburgh EH9 3FF, UK
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19
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Transplantation of Human Urine-Derived Stem Cells Ameliorates Erectile Function and Cavernosal Endothelial Function by Promoting Autophagy of Corpus Cavernosal Endothelial Cells in Diabetic Erectile Dysfunction Rats. Stem Cells Int 2019; 2019:2168709. [PMID: 31582984 PMCID: PMC6754951 DOI: 10.1155/2019/2168709] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2019] [Revised: 07/03/2019] [Accepted: 08/08/2019] [Indexed: 02/07/2023] Open
Abstract
Aims Cavernosal endothelial dysfunction is one of the factors in developing diabetic erectile dysfunction (DED), but the mechanism of cavernosal endothelial dysfunction is unclear. The present study is aimed at determining the contribution of autophagy in cavernosal endothelial dysfunction of DED rats and explaining the therapeutic effect of urine-derived stem cells (USCs). Methods After rat corpus cavernosal vascular endothelial cells (CCECs) were isolated and cultured in vitro, CCECs were treated with advanced glycation end products (AGEs) to mimic the diabetic situation. Autophagy flux, proliferation, and apoptosis of CCECs were determined by mRFP-GFP-LC3 adenovirus infection combined with fluorescence observation and western blot analysis. USCs were isolated from the urine of six healthy male donors, and coculture systems of USCs and CCECs were developed to assess the protective effect of USCs for CCECs in vitro. The contribution of autophagy to the cellular damage in CCECs was evaluated by the autophagic inhibitor, 3-methyladenine (3-MA). Then, DED rats were induced by streptozotocin (50 mg/kg) and screened by apomorphine test (100 μg/kg). In DED rats, USCs or PBS as vehicle was administrated by intracavernous injection (n = 15 per group), and another 15 normal rats served as normal controls. Four weeks after injection, erectile function was evaluated by measuring the intracavernosal pressure (ICP) and mean arterial pressure (MAP). Cavernosal endothelial function and autophagic activity were examined by western blot, immunofluorescence, and transmission electron microscopy. Results In vitro, AGE-treated CCECs displayed fewer LC3 puncta formation and expressed less LC3-II, Beclin1, and PCNA but expressed more p62 and cleaved-caspase3 than controls (p < 0.05). Coculture of USCs with CCECs demonstrated that USCs were able to protect CCECs from AGE-induced autophagic dysfunction and cellular damage, which could be abolished by 3-MA (p < 0.05). DED rats showed lower ratio of ICP/MAP, reduced expression of endothelial markers, and fewer autophagic vacuoles in the cavernosal endothelium when compared with normal rats (p < 0.05). Intracavernous injection of USCs improved erectile function and cavernosal endothelial function of DED rats (p < 0.05). Most importantly, our data showed that the repaired erectile function and cavernosal endothelial function were the result of restored autophagic activity of the cavernosal endothelium in DED rats (p < 0.05). Conclusions Impaired autophagy is involved in the cavernosal endothelial dysfunction and erectile dysfunction of DED rats. Intracavernous injection of USCs upregulates autophagic activity in the cavernosal endothelium, contributing to ameliorating cavernosal endothelial dysfunction and finally improving the erectile dysfunction induced by diabetes.
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20
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Shi M, Yang S, Zhu X, Sun D, Sun D, Jiang X, Zhang C, Wang L. The RAGE/STAT5/autophagy axis regulates senescence in mesangial cells. Cell Signal 2019; 62:109334. [PMID: 31158467 DOI: 10.1016/j.cellsig.2019.05.019] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2019] [Revised: 05/26/2019] [Accepted: 05/30/2019] [Indexed: 02/07/2023]
Abstract
Renal aging and associated functional decline are associated with an increase in cellular senescence. Previous studies show a direct correlation between advanced glycation end products (AGEs) accumulation and renal aging, chronic kidney disease (CKD) and other nephropathies, although the underlying molecular mechanisms remain largely unclear. We found elevated levels of the receptor of advanced glycation end product (RAGE) as well as STAT5 in aged human kidneys, as well as in human mesangial cells aged artificially through AGEs. Furthermore, genetic and pharmacological ablation of STAT5 significantly downregulated p16 levels and the percentage of β-Gal-positive senescent cells in mesangial cells and kidneys of SD rats, indicating that AGEs-induced senescence depends on STAT5 signaling. The aged kidney tissues (both in patients and SD rats) and mesangial cells show low levels of LC3 (both LC3-II and LC3-II/I), and cultured mesangial cells also show fewer autolysosomes, autophagosomes, and autophagic vacuoles, which can be partially restored upon STAT5 inhibition. This indicates that AGEs accumulation also obliterates the protective effects of autophagy against aging via the RAGE/STAT5 axis. Direct inhibition of autophagy via 3-methyladenine (3-MA) increases the phenotype of renal aging without activating RAGE, it is inhibition of autophagy caused by RAGE/STAT5 that leads to mesangial aging. In conclusion, we found AGEs induced inhibition of autophagy and cellular senescence in mesangial cells via the RAGE/STAT5 pathway. Moreover, we found that RAGE/STAT5 acts as a key link between autophagy and senescence in the process of mesangial aging in vivo and in vitro.
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Affiliation(s)
- Mai Shi
- Department of Nephrology, The First Hospital of China Medical University, No.155 NanjingBei Rd., Heping District, Shenyang, Liaoning 110001, China
| | - Shuang Yang
- Department of Nephrology, The First Hospital of China Medical University, No.155 NanjingBei Rd., Heping District, Shenyang, Liaoning 110001, China
| | - Xinwang Zhu
- Department of Nephrology, The First Hospital of China Medical University, No.155 NanjingBei Rd., Heping District, Shenyang, Liaoning 110001, China
| | - Da Sun
- Department of Nephrology, The First Hospital of China Medical University, No.155 NanjingBei Rd., Heping District, Shenyang, Liaoning 110001, China
| | - Dan Sun
- Department of Nephrology, The First Hospital of China Medical University, No.155 NanjingBei Rd., Heping District, Shenyang, Liaoning 110001, China
| | - Xue Jiang
- Department of Nephrology, The First Hospital of China Medical University, No.155 NanjingBei Rd., Heping District, Shenyang, Liaoning 110001, China
| | - Congxiao Zhang
- Department of Nephrology, The First Hospital of China Medical University, No.155 NanjingBei Rd., Heping District, Shenyang, Liaoning 110001, China
| | - Lining Wang
- Department of Nephrology, The First Hospital of China Medical University, No.155 NanjingBei Rd., Heping District, Shenyang, Liaoning 110001, China.
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21
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Argüelles S, Guerrero-Castilla A, Cano M, Muñoz MF, Ayala A. Advantages and disadvantages of apoptosis in the aging process. Ann N Y Acad Sci 2019; 1443:20-33. [PMID: 30839127 DOI: 10.1111/nyas.14020] [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: 10/20/2018] [Revised: 12/14/2018] [Accepted: 01/16/2019] [Indexed: 12/12/2022]
Abstract
Researchers cannot predict as yet how long a human being can live. Life expectancy has been steadily increasing in the last century, but perhaps not always the quality of life in parallel with it. Future generations will be faced with the problems of an increased life expectancy along with the emergence of new age-related diseases. A deeper understanding of the aging process is crucial to ameliorate, if not to prevent, these projected new old-age diseases. One of the mechanisms responsible for healthy aging is through the effective maintenance of physiological, biochemical, and immunological functions. To carry this out, the organism needs to create new cells to replace old ones and to induce the disappearance of old and damaged cells. Apoptosis is involved in all these processes. However, if apoptosis is dysregulated, premature senescence-associated diseases are likely to appear. In our review, the focus will be on a better understanding of the role of apoptosis in the aging process. These signaling pathways will most assuredly be pharmacologically targeted in antiaging medicine therapies.
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Affiliation(s)
- Sandro Argüelles
- Department of Physiology, Faculty of Pharmacy, University of Seville, Seville, Spain
| | | | - Mercedes Cano
- Department of Physiology, Faculty of Pharmacy, University of Seville, Seville, Spain
| | - Mario F Muñoz
- Department of Biochemistry and Molecular Biology, Faculty of Pharmacy, University of Seville, Seville, Spain
| | - Antonio Ayala
- Department of Biochemistry and Molecular Biology, Faculty of Pharmacy, University of Seville, Seville, Spain
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22
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Sensitization of tamoxifen-resistant breast cancer cells by Z-ligustilide through inhibiting autophagy and accumulating DNA damages. Oncotarget 2018; 8:29300-29317. [PMID: 28431397 PMCID: PMC5438731 DOI: 10.18632/oncotarget.16832] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Accepted: 03/26/2017] [Indexed: 12/19/2022] Open
Abstract
Autophagy plays a pro-survival role in the tamoxifen-resistant breast cancer cells. Herein we found that autophagy was concomitantly induced in tamoxifen-resistant MCF-7 (MCF-7TR5) cells through the dissociation of Bcl-2 from Beclin 1 and subsequent enhancement of interaction among the ATG14-Beclin1-PI3KC3 complex. Moreover, higher level of DNA damage was observed in MCF-7TR5 cells with the decreased BRCA1 and RAD51 level and the increased Ku80 level. Interestingly, Nur77 was selectively degraded by autophagy, which causes the release of Ku80 from the Nur77-Ku80 complex, resulting in the increase of the DNA binding of Ku80 and DNA-PKcs. Meanwhile, Z-ligustilide, a phthalide compound from Radix Angelica sinensis, was shown to inhibit the autophagic flux by blocking the autophagosome-lysosome fusion. Importantly, Z-ligustilide-mediated autophagy inhibition restored Nur77 expression in MCF-7TR5 cells. Furthermore, Z-ligustilide promoted the interaction of Nur77 with Ku80 and thereby abolished the association of DNA-PKcs with DNA ends. Moreover, Z-ligustilide sensitized MCF-7TR5 cells in a caspase-independent cell death and enhanced the DNA damage caused by tamoxifen, which was found to be attenuated by shNur77. Together, these findings not only provide important insights into the formation of tamoxifen resistance in breast cancer cells, but also suggest Z-ligustilide may function as a novel autophagy inhibitor to overcome chemoresistance.
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23
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Karagiannis AD, Liu M, Toth PP, Zhao S, Agrawal DK, Libby P, Chatzizisis YS. Pleiotropic Anti-atherosclerotic Effects of PCSK9 Inhibitors From Molecular Biology to Clinical Translation. Curr Atheroscler Rep 2018. [DOI: 10.1007/s11883-018-0718-x] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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24
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Jin F, Jiang K, Ji S, Wang L, Ni Z, Huang F, Li C, Chen R, Zhang H, Hu Z, Zha X. Deficient TSC1/TSC2-complex suppression of SOX9-osteopontin-AKT signalling cascade constrains tumour growth in tuberous sclerosis complex. Hum Mol Genet 2017; 26:407-419. [PMID: 28013293 DOI: 10.1093/hmg/ddw397] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2016] [Accepted: 11/17/2016] [Indexed: 12/29/2022] Open
Abstract
Tuberous sclerosis complex (TSC) is an autosomal dominant genetic disorder featured with multi-organ benign tumours. Disruption of TSC1/TSC2 complex suppression on mammalian/mechanistic target of rapamycin (mTOR) signalling causes TSC. Hyperactive mTOR-mediated negative feedback regulation of AKT partially contributes to the benign nature of TSC-associated tumours. In this study, we demonstrated that osteopontin (OPN) was dramatically reduced by loss of TSC1/TSC2 complex in Tsc2-null mouse embryonic fibroblasts (MEFs), rat uterine leiomyoma-derived Tsc2-deficient cells, genetically modified mouse TSC models, and clinical samples. TSC1/TSC2 complex upregulation of OPN expression is mediated by transcription factor SOX9 in an mTOR-independent manner. Moreover, ablation of OPN by deficient TSC1/TSC2 complex contributed to inactivation of AKT in TSC cells. Lastly, the abundance of OPN dictated the potency of cell proliferation and tumour development. Therefore, loss of TSC1/TSC2 complex led to mTOR-independent inhibition of AKT at least partially through downregulation of the SOX9-OPN signalling cascade. We suggest that the decreased SOX9-OPN-AKT signalling pathway safeguard against the development of malignant tumours in TSC patients.
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Affiliation(s)
- Fuquan Jin
- Department of Biochemistry & Molecular Biology, School of Basic Medicine, Anhui Medical University, Hefei, People's Republic of China
| | - Keguo Jiang
- Department of Biochemistry & Molecular Biology, School of Basic Medicine, Anhui Medical University, Hefei, People's Republic of China.,Department of Nephrology, The Third Affiliated Hospital, Anhui Medical University, Hefei, People's Republic of China
| | - Shuang Ji
- Department of Biochemistry & Molecular Biology, School of Basic Medicine, Anhui Medical University, Hefei, People's Republic of China.,Department of Respiratory Medicine, The First Affiliated Hospital, Anhui Medical University, Hefei, People's Republic of China
| | - Li Wang
- Department of Biochemistry & Molecular Biology, School of Basic Medicine, Anhui Medical University, Hefei, People's Republic of China
| | - Zhaofei Ni
- Department of Biochemistry & Molecular Biology, School of Basic Medicine, Anhui Medical University, Hefei, People's Republic of China
| | - Fuqiang Huang
- State Key Laboratory of Medical Molecular Biology, Department of Physiology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, People's Republic of China and
| | - Chunjia Li
- State Key Laboratory of Medical Molecular Biology, Department of Physiology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, People's Republic of China and
| | - Rongrong Chen
- State Key Laboratory of Medical Molecular Biology, Department of Physiology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, People's Republic of China and
| | - Hongbing Zhang
- State Key Laboratory of Medical Molecular Biology, Department of Physiology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, People's Republic of China and
| | - Zhongdong Hu
- Modern Research Center for Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing, People's Republic of China
| | - Xiaojun Zha
- Department of Biochemistry & Molecular Biology, School of Basic Medicine, Anhui Medical University, Hefei, People's Republic of China.,Institute of Dermatology, Anhui Medical University, Hefei, People's Republic of China
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25
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Ferraresi A, Titone R, Follo C, Castiglioni A, Chiorino G, Dhanasekaran DN, Isidoro C. The protein restriction mimetic Resveratrol is an autophagy inducer stronger than amino acid starvation in ovarian cancer cells. Mol Carcinog 2017; 56:2681-2691. [PMID: 28856729 DOI: 10.1002/mc.22711] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2017] [Revised: 07/24/2017] [Accepted: 08/08/2017] [Indexed: 12/26/2022]
Abstract
The potential benefit of nutrient starvation in the prevention and treatment of cancer is presently under consideration. Resveratrol (RV), a dietary polyphenol acting as a protein (caloric) restriction mimetic, could substitute for amino acid starvation. The effects of starvation and of caloric restriction are mediated, among others, by autophagy, a process that contributes to cell homeostasis by promoting the lysosomal degradation of damaged and redundant self-constituents. Up-regulation of autophagy favors cell survival under nutrient shortage situation, and may drive cancer cells into a non-replicative, dormant state. Both RV and amino acid starvation effectively induced the aminoacid response and autophagy. These processes were associated with inhibition of the mTOR pathway and disruption of the BECLIN1-BCL-2 complex. The number of transcripts positively impinging on the autophagy pathway was higher in RV-treated than in starved cancer cells. Consistent with our data, it appears that RV treatment is more effective than and can substitute for starvation for inducing autophagy in cancer cells. The present findings are clinically relevant because of the potential therapeutic implications.
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Affiliation(s)
- Alessandra Ferraresi
- Laboratory of Molecular Pathology, Department of Health Sciences, Università del Piemonte Orientale "A. Avogadro", Novara, Italy
| | - Rossella Titone
- Laboratory of Molecular Pathology, Department of Health Sciences, Università del Piemonte Orientale "A. Avogadro", Novara, Italy
| | - Carlo Follo
- Laboratory of Molecular Pathology, Department of Health Sciences, Università del Piemonte Orientale "A. Avogadro", Novara, Italy
| | - Andrea Castiglioni
- Laboratory of Molecular Pathology, Department of Health Sciences, Università del Piemonte Orientale "A. Avogadro", Novara, Italy
| | - Giovanna Chiorino
- Cancer Genomics Laboratory, Fondazione Edo ed Elvo Tempia, Biella, Italy
| | - Danny N Dhanasekaran
- Stephenson Cancer Center, The University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma
| | - Ciro Isidoro
- Laboratory of Molecular Pathology, Department of Health Sciences, Università del Piemonte Orientale "A. Avogadro", Novara, Italy
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26
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Klaus V, Bastek H, Damme K, Collins LB, Frötschl R, Benda N, Lutter D, Ellinger-Ziegelbauer H, Swenberg JA, Dietrich DR, Stemmer K. Time-matched analysis of DNA adduct formation and early gene expression as predictive tool for renal carcinogenesis in methylazoxymethanol acetate treated Eker rats. Arch Toxicol 2017; 91:3427-3438. [PMID: 28349193 DOI: 10.1007/s00204-017-1953-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2016] [Accepted: 03/01/2017] [Indexed: 11/28/2022]
Abstract
Genotoxic carcinogens pose great hazard to human health. Uncertainty of current risk assessment strategies and long latency periods between first carcinogen exposure and diagnosis of tumors have raised interest in predictive biomarkers. Initial DNA adduct formation is a necessary step for genotoxin induced carcinogenesis. However, as DNA adducts not always translate into tumorigenesis, their predictive value is limited. Here we hypothesize that the combined analysis of pro-mutagenic DNA adducts along with time-matched gene expression changes could serve as a superior prediction tool for genotoxic carcinogenesis. Eker rats, heterozygous for the tuberous sclerosis (Tsc2) tumor suppressor gene and thus highly susceptible towards genotoxic renal carcinogens, were continuously treated with the DNA alkylating carcinogen methylazoxymethanol acetate (MAMAc). Two weeks of MAMAc treatment resulted in a time-dependent increase of O6-methylguanine and N7-methylguanine adducts in the kidney cortex, which was however not reflected by significant expression changes of cyto-protective genes involved in DNA repair, cell cycle arrest or apoptosis. Instead, we found a transcriptional regulation of genes involved in the tumor-related MAPK, FoxO and TGF-beta pathways. Continuous MAMAc treatment for up to 6 months resulted in a mild but significant increase of cancerous lesions. In summary, the combined analysis of DNA adducts and early gene expression changes could serve as a suitable predictive tool for genotoxicant-induced carcinogenesis.
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Affiliation(s)
- Valentina Klaus
- Computational Discovery Research, Institute for Diabetes and Obesity, Helmholtz Diabetes Center & German Center for Diabetes Research (DZD), Helmholtz Zentrum München, Neuherberg, Germany
| | - Heinke Bastek
- Human and Environmental Toxicology, University of Konstanz, Konstanz, Germany
| | - Katja Damme
- Department of Environmental Sciences and Engineering, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
| | - Leonard B Collins
- Department of Environmental Sciences and Engineering, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
| | - Roland Frötschl
- Federal Institute for Drugs and Medical Devices, Bonn, Germany
| | - Norbert Benda
- Federal Institute for Drugs and Medical Devices, Bonn, Germany
| | - Dominik Lutter
- Computational Discovery Research, Institute for Diabetes and Obesity, Helmholtz Diabetes Center & German Center for Diabetes Research (DZD), Helmholtz Zentrum München, Neuherberg, Germany
| | | | - James A Swenberg
- Department of Environmental Sciences and Engineering, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
| | - Daniel R Dietrich
- Human and Environmental Toxicology, University of Konstanz, Konstanz, Germany
| | - Kerstin Stemmer
- Metabolism and Cancer, Institute for Diabetes and Obesity, Helmholtz Diabetes Center & German Center for Diabetes Research (DZD), Helmholtz Zentrum München, Neuherberg, Germany.
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27
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Impact on Autophagy and Ultraviolet B Induced Responses of Treatment with the MTOR Inhibitors Rapamycin, Everolimus, Torin 1, and pp242 in Human Keratinocytes. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2017; 2017:5930639. [PMID: 28400912 PMCID: PMC5376460 DOI: 10.1155/2017/5930639] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/13/2016] [Revised: 01/15/2017] [Accepted: 02/13/2017] [Indexed: 12/21/2022]
Abstract
The mechanistic target of Rapamycin (MTOR) protein is a crucial signaling regulator in mammalian cells that is extensively involved in cellular biology. The function of MTOR signaling in keratinocytes remains unclear. In this study, we detected the MTOR signaling and autophagy response in the human keratinocyte cell line HaCaT and human epidermal keratinocytes treated with MTOR inhibitors. Moreover, we detected the impact of MTOR inhibitors on keratinocytes exposed to the common carcinogenic stressors ultraviolet B (UVB) and UVA radiation. As a result, keratinocytes were sensitive to the MTOR inhibitors Rapamycin, everolimus, Torin 1, and pp242, but the regulation of MTOR downstream signaling was distinct. Next, autophagy induction only was observed in HaCaT cells treated with Rapamycin. Furthermore, we found that MTOR signaling was insensitive to UVB but sensitive to UVA radiation. UVB treatment also had no impact on the inhibition of MTOR signaling by MTOR inhibitors. Finally, MTOR inhibition by Rapamycin, everolimus, or pp242 did not affect the series of biological events in keratinocytes exposed to UVB, including the downregulation of BiP and PERK, activation of Histone H2A and JNK, and cleavage of caspase-3 and PARP. Our study demonstrated that MTOR inhibition in keratinocytes cannot always induce autophagy, and the MTOR pathway does not play a central role in the UVB triggered cellular response.
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28
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Ding Z, Liu S, Wang X, Mathur P, Dai Y, Theus S, Deng X, Fan Y, Mehta JL. Cross-Talk Between PCSK9 and Damaged mtDNA in Vascular Smooth Muscle Cells: Role in Apoptosis. Antioxid Redox Signal 2016; 25:997-1008. [PMID: 27197615 DOI: 10.1089/ars.2016.6631] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
AIMS The present study was designed to investigate a possible interaction between vascular smooth muscle cell (SMC)-derived proprotein convertase subtilisin/kexin type 9 (PCSK9) and mitochondrial DNA (mtDNA) damage. RESULTS Treatment of cultured SMCs with the proinflammatory stimulus lipopolysaccharide (LPS) stimulated PCSK9 release and induced mtDNA damage. PCSK9 inhibition by its siRNA reduced, and its enhancement increased, mtDNA damage. Induction of mitochondria-derived reactive oxygen species (mtROS) (by rotenone, thenoyltrifluoroacetone, or antimycin A) enhanced mtDNA damage as well as PCSK9 release, suggesting a role of mtROS in PCSK9-mtDNA damage interplay. Induction of mtDNA damage (with the autophagy inhibitor, 3-methyladenine, or DNase II inhibition) enhanced PCSK9 expression, and inhibition of mtDNA damage (with the autophagy inducer, rapamycin) reduced PCSK9 expression, indicating bidirectional interplay between PCSK9 and mtDNA damage. Other studies showed that p38 MAPK is involved in PCSK9-induced mtDNA damage, and mammalian target of rapamycin activation plays a role in mtDNA damage-induced PCSK9 release. Functional impact of PCSK9-mtDNA damage cross-talk was evident in the form of SMC apoptosis, which was enhanced in cells treated with recombinant human PCSK9, but inhibited in cells treated with PCSK9 siRNA. Last, LPS administration in wild-type mice resulted in simultaneous PCSK9 release and mtDNA damage, but mtDNA damage was minimal in PCSK9-null mice given LPS. INNOVATION Vascular SMC-derived PCSK9 induces mtDNA damage, and damaged mtDNA fragments stimulate PCSK9 release mediated, at least in part, by mtROS. CONCLUSIONS These observations suggest positive feedback interplay between SMC-derived PCSK9 and mtDNA damage in the proinflammatory milieu involving mtROS. This interaction results in cellular injury, characterized by apoptosis-a hallmark of atherosclerosis. Antioxid. Redox Signal. 25, 997-1008.
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Affiliation(s)
- Zufeng Ding
- 1 Central Arkansas Veterans Healthcare System, The University of Arkansas for Medical Sciences , Little Rock, Arkansas.,2 Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Biological Science and Medical Engineering, Beihang University , Beijing, China
| | - Shijie Liu
- 1 Central Arkansas Veterans Healthcare System, The University of Arkansas for Medical Sciences , Little Rock, Arkansas
| | - Xianwei Wang
- 1 Central Arkansas Veterans Healthcare System, The University of Arkansas for Medical Sciences , Little Rock, Arkansas
| | - Pankaj Mathur
- 1 Central Arkansas Veterans Healthcare System, The University of Arkansas for Medical Sciences , Little Rock, Arkansas
| | - Yao Dai
- 1 Central Arkansas Veterans Healthcare System, The University of Arkansas for Medical Sciences , Little Rock, Arkansas
| | - Sue Theus
- 1 Central Arkansas Veterans Healthcare System, The University of Arkansas for Medical Sciences , Little Rock, Arkansas
| | - Xiaoyan Deng
- 2 Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Biological Science and Medical Engineering, Beihang University , Beijing, China
| | - Yubo Fan
- 2 Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Biological Science and Medical Engineering, Beihang University , Beijing, China
| | - Jawahar L Mehta
- 1 Central Arkansas Veterans Healthcare System, The University of Arkansas for Medical Sciences , Little Rock, Arkansas
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Umbilical Cord-Derived Mesenchymal Stem Cells Suppress Autophagy of T Cells in Patients with Systemic Lupus Erythematosus via Transfer of Mitochondria. Stem Cells Int 2016; 2016:4062789. [PMID: 28053607 PMCID: PMC5174187 DOI: 10.1155/2016/4062789] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2016] [Revised: 11/05/2016] [Accepted: 11/10/2016] [Indexed: 02/07/2023] Open
Abstract
Aberrant autophagy played an important role in the pathogenesis of autoimmune diseases, especially in systemic lupus erythematosus (SLE). In this study, we showed that T cells from SLE patients had higher autophagic activity than that from healthy controls. A correlation between autophagic activity and apoptotic rate was observed in activated T cells. Moreover, activation of autophagy with rapamycin increased T cell apoptosis, whereas inhibition of autophagy with 3-MA decreased T cell apoptosis. Umbilical cord-derived mesenchymal stem cells (UC-MSCs) could inhibit respiratory mitochondrial biogenesis in activated T cells to downregulate autophagy and consequently decrease T cell apoptosis through mitochondrial transfer and thus may play an important role in SLE treatment.
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30
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Zheng K, Li Y, Wang S, Wang X, Liao C, Hu X, Fan L, Kang Q, Zeng Y, Wu X, Wu H, Zhang J, Wang Y, He Z. Inhibition of autophagosome-lysosome fusion by ginsenoside Ro via the ESR2-NCF1-ROS pathway sensitizes esophageal cancer cells to 5-fluorouracil-induced cell death via the CHEK1-mediated DNA damage checkpoint. Autophagy 2016; 12:1593-613. [PMID: 27310928 PMCID: PMC5082787 DOI: 10.1080/15548627.2016.1192751] [Citation(s) in RCA: 74] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2015] [Revised: 05/12/2016] [Accepted: 05/17/2016] [Indexed: 01/18/2023] Open
Abstract
Modulation of autophagy has been increasingly regarded as a promising cancer therapeutic approach. In this study, we screened several ginsenosides extracted from Panax ginseng and identified ginsenoside Ro (Ro) as a novel autophagy inhibitor. Ro blocked the autophagosome-lysosome fusion process by raising lysosomal pH and attenuating lysosomal cathepsin activity, resulting in the accumulation of the autophagosome marker MAP1LC3B/LC3B and SQSTM1/p62 (sequestosome 1) in various esophageal cancer cell lines. More detailed studies demonstrated that Ro activated ESR2 (estrogen receptor 2), which led to the activation of NCF1/p47(PHOX) (neutrophil cytosolic factor 1), a subunit of NADPH oxidase, and subsequent reactive oxygen species (ROS) production. Treatment with siRNAs or inhibitors of the ESR2-NCF1-ROS axis, such as N-acetyl-L-cysteine (NAC), diphenyleneiodonium chloride (DPI), apocynin (ACN), Tiron, and Fulvestrant apparently decreased Ro-induced LC3B-II, GFP-LC3B puncta, and SQSTM1, indicating that ROS instigates autophagic flux inhibition triggered by Ro. More importantly, suppression of autophagy by Ro sensitized 5-fluorouracil (5-Fu)-induced cell death in chemoresistant esophageal cancer cells. 5-Fu induced prosurvival autophagy, and by inhibiting such autophagy, siRNAs against BECN1/beclin 1, ATG5, ATG7, and LC3B enhanced 5-Fu-induced autophagy-associated and apoptosis-independent cell death. We observed that Ro potentiates 5-Fu cytotoxicity via delaying CHEK1 (checkpoint kinase 1) degradation and downregulating DNA replication process, resulting in the delayed DNA repair and the accumulation of DNA damage. In summary, these data suggest that Ro is a novel autophagy inhibitor and could function as a potent anticancer agent in combination therapy to overcome chemoresistance.
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Affiliation(s)
- Kai Zheng
- Department of Pharmacy, School of Medicine, Innovation Platform for Natural Small Molecule Drugs, Shenzhen Key Laboratory of Novel Natural Health Care Products, Engineering Laboratory of Shenzhen Natural Small Molecule Innovative Drugs, Shenzhen University, Shenzhen, China
- Guangzhou Jinan Biomedicine Research and Development Center, College of Life Science and Technology, Jinan University, Guangzhou, China
| | - Yan Li
- The First Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Shaoxiang Wang
- Department of Pharmacy, School of Medicine, Innovation Platform for Natural Small Molecule Drugs, Shenzhen Key Laboratory of Novel Natural Health Care Products, Engineering Laboratory of Shenzhen Natural Small Molecule Innovative Drugs, Shenzhen University, Shenzhen, China
| | - Xiao Wang
- Guangzhou Jinan Biomedicine Research and Development Center, College of Life Science and Technology, Jinan University, Guangzhou, China
| | - Chenghui Liao
- Department of Pharmacy, School of Medicine, Innovation Platform for Natural Small Molecule Drugs, Shenzhen Key Laboratory of Novel Natural Health Care Products, Engineering Laboratory of Shenzhen Natural Small Molecule Innovative Drugs, Shenzhen University, Shenzhen, China
| | - Xiaopeng Hu
- Department of Pharmacy, School of Medicine, Innovation Platform for Natural Small Molecule Drugs, Shenzhen Key Laboratory of Novel Natural Health Care Products, Engineering Laboratory of Shenzhen Natural Small Molecule Innovative Drugs, Shenzhen University, Shenzhen, China
| | - Long Fan
- Department of Pharmacy, School of Medicine, Innovation Platform for Natural Small Molecule Drugs, Shenzhen Key Laboratory of Novel Natural Health Care Products, Engineering Laboratory of Shenzhen Natural Small Molecule Innovative Drugs, Shenzhen University, Shenzhen, China
| | - Qiangrong Kang
- Department of Pharmacy, School of Medicine, Innovation Platform for Natural Small Molecule Drugs, Shenzhen Key Laboratory of Novel Natural Health Care Products, Engineering Laboratory of Shenzhen Natural Small Molecule Innovative Drugs, Shenzhen University, Shenzhen, China
| | - Yong Zeng
- The First Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Xuli Wu
- Department of Pharmacy, School of Medicine, Innovation Platform for Natural Small Molecule Drugs, Shenzhen Key Laboratory of Novel Natural Health Care Products, Engineering Laboratory of Shenzhen Natural Small Molecule Innovative Drugs, Shenzhen University, Shenzhen, China
| | - Haiqiang Wu
- Department of Pharmacy, School of Medicine, Innovation Platform for Natural Small Molecule Drugs, Shenzhen Key Laboratory of Novel Natural Health Care Products, Engineering Laboratory of Shenzhen Natural Small Molecule Innovative Drugs, Shenzhen University, Shenzhen, China
| | - Jian Zhang
- Department of Pharmacy, School of Medicine, Innovation Platform for Natural Small Molecule Drugs, Shenzhen Key Laboratory of Novel Natural Health Care Products, Engineering Laboratory of Shenzhen Natural Small Molecule Innovative Drugs, Shenzhen University, Shenzhen, China
| | - Yifei Wang
- Guangzhou Jinan Biomedicine Research and Development Center, College of Life Science and Technology, Jinan University, Guangzhou, China
| | - Zhendan He
- Department of Pharmacy, School of Medicine, Innovation Platform for Natural Small Molecule Drugs, Shenzhen Key Laboratory of Novel Natural Health Care Products, Engineering Laboratory of Shenzhen Natural Small Molecule Innovative Drugs, Shenzhen University, Shenzhen, China
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Hu Z, Yang A, Fan H, Wang Y, Zhao Y, Zha X, Zhang H, Tu P. Huaier aqueous extract sensitizes cells to rapamycin and cisplatin through activating mTOR signaling. JOURNAL OF ETHNOPHARMACOLOGY 2016; 186:143-150. [PMID: 27045863 DOI: 10.1016/j.jep.2016.03.069] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2015] [Revised: 02/01/2016] [Accepted: 03/31/2016] [Indexed: 06/05/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Traditional Chinese Medicine (TCM) has been increasingly used to treat cancers. Trametes robiniophila Murr. (Huaier) is a medicinal fungus for treatment of inflammation and cancer. Huaier Granule has great clinical effect in various types of cancers, including liver cancer, lung cancer, gastric cancer, and breast cancer. AIM OF THE STUDY The present study was performed to determine the therapeutical effect of Huaier on cancers caused by aberrant mTOR signaling in vitro and in vivo, investigate the combination effect of Huaier and rapamycin or cisplatin on cell viability, and explore its underlying mechanism. MATERIALS AND METHODS The therapeutical effect of Huaier on cancers caused by aberrant mTOR signaling and the underlying mechanism of combination effect of Huaier and rapamycin or cisplatin on cell viability were investigated in mouse embryonic fibroblasts, rat uterine leiomyoma cells, human hepatoma cells, human lung carcinoma cells, and xenograft tumor model by cell viability assay and immunoblotting. RESULTS Activation of mTOR sensitizes cells to Huaier treatment. Huaier inhibits tumorigenic capacity of cells with activated mTOR in vivo. Moreover, activation of mTOR signaling induced by Huaier contributes to the increased sensitivity of cells to rapamycin or cisplatin in response to Huaier treatment. CONCLUSIONS Huaier may be a potential drug for the treatment of cancers caused by aberrant mTOR signaling. The combination of Huaier and rapamycin may be a candidate regimen in the treatment of these cancers.
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Affiliation(s)
- Zhongdong Hu
- Modern Research Center for Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing 100029, China
| | - Ailin Yang
- Modern Research Center for Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing 100029, China; School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 100102, China
| | - Haitao Fan
- College of Bioengineering, Beijing Polytechnic, Beijing 100029, China
| | - Ying Wang
- Department of Molecular Orthopaedics, Beijing Institute of Traumatology and Orthopaedics, Beijing Jishuitan Hospital, Beijing 100035, China
| | - Yunfang Zhao
- Modern Research Center for Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing 100029, China
| | - Xiaojun Zha
- Department of Biochemistry & Molecular Biology, School of Basic Medicine, Anhui Medical University, Hefei 230032, China
| | - Hongbing Zhang
- State Key Laboratory of Medical Molecular Biology, Department of Physiology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences & School of Basic Medicine, Peking Union Medical College, Beijing 100005, China
| | - Pengfei Tu
- Modern Research Center for Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing 100029, China.
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Wang S, Huang G, Hu Q, Zou Q. A network-based method for the identification of putative genes related to infertility. Biochim Biophys Acta Gen Subj 2016; 1860:2716-24. [PMID: 27102279 DOI: 10.1016/j.bbagen.2016.04.010] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2016] [Revised: 04/02/2016] [Accepted: 04/08/2016] [Indexed: 01/18/2023]
Abstract
BACKGROUND Infertility has become one of the major health problems worldwide, with its incidence having risen markedly in recent decades. There is an urgent need to investigate the pathological mechanisms behind infertility and to design effective treatments. However, this is made difficult by the fact that various biological factors have been identified to be related to infertility, including genetic factors. METHODS A network-based method was established to identify new genes potentially related to infertility. A network constructed using human protein-protein interactions based on previously validated infertility-related genes enabled the identification of some novel candidate genes. These genes were then filtered by a permutation test and their functional and structural associations with infertility-related genes. RESULTS Our method identified 23 novel genes, which have strong functional and structural associations with previously validated infertility-related genes. CONCLUSIONS Substantial evidence indicates that the identified genes are strongly related to dysfunction of the four main biological processes of fertility: reproductive development and physiology, gametogenesis, meiosis and recombination, and hormone regulation. GENERAL SIGNIFICANCE The newly discovered genes may provide new directions for investigating infertility. This article is part of a Special Issue entitled "System Genetics" Guest Editor: Dr. Yudong Cai and Dr. Tao Huang.
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Affiliation(s)
- ShaoPeng Wang
- College of Life Science, Shanghai University, Shanghai 200444, China.
| | - GuoHua Huang
- College of Life Science, Shanghai University, Shanghai 200444, China.
| | - Qinghua Hu
- School of Computer Science and Technology, Tianjin University, Tianjin 300072, China; State Key Laboratory of System Bioengineering of the Ministry of Education, Tianjin University, Tianjin 300072, China.
| | - Quan Zou
- School of Computer Science and Technology, Tianjin University, Tianjin 300072, China; State Key Laboratory of Medicinal Chemical Biology, NanKai University, Tianjin 300071, China.
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Zhou Y, Zhao RH, Tseng KF, Li KP, Lu ZG, Liu Y, Han K, Gan ZH, Lin SC, Hu HY, Min DL. Sirolimus induces apoptosis and reverses multidrug resistance in human osteosarcoma cells in vitro via increasing microRNA-34b expression. Acta Pharmacol Sin 2016; 37:519-29. [PMID: 26924291 DOI: 10.1038/aps.2015.153] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2015] [Accepted: 12/29/2015] [Indexed: 02/07/2023] Open
Abstract
AIM Multi-drug resistance poses a critical bottleneck in chemotherapy. Given the up-regulation of mTOR pathway in many chemoresistant cancers, we examined whether sirolimus (rapamycin), a first generation mTOR inhibitor, might induce human osteosarcoma (OS) cell apoptosis and increase the sensitivity of OS cells to anticancer drugs in vitro. METHODS Human OS cell line MG63/ADM was treated with sirolimus alone or in combination with doxorubicin (ADM), gemcitabine (GEM) or methotrexate (MTX). Cell proliferation and apoptosis were detected using CCK-8 assay and flow cytometry, respectively. MiRNAs in the cells were analyzed with miRNA microarray. The targets of miR-34b were determined based on TargetScan analysis and luciferase reporter assays. The expression of relevant mRNA and proteins was measured using qRT-PCR and Western blotting. MiR-34, PAK1 and ABCB1 levels in 40 tissue samples of OS patients were analyzed using qRT-PCR and in situ hybridization assays. RESULTS Sirolimus (1-100 nmol/L) dose-dependently suppressed the cell proliferation (IC50=23.97 nmol/L) and induced apoptosis. Sirolimus (10 nmol/L) significantly sensitized the cells to anticancer drugs, leading to decreased IC50 values of ADM, GEM and MTX (from 25.48, 621.41 and 21.72 μmol/L to 4.93, 73.92 and 6.77 μmol/L, respectively). Treatment of with sirolimus increased miR-34b levels by a factor of 7.5 in the cells. Upregulation of miR-34b also induced apoptosis and increased the sensitivity of the cells to the anticancer drugs, whereas transfection with miR-34b-AMO, an inhibitor of miR-34b, reversed the anti-proliferation effect of sirolimus. Two key regulators of cell cycle, apoptosis and multiple drug resistance, PAK1 and ABCB1, were demonstrated to be the direct targets of miR-34b. In 40 tissue samples of OS patients, significantly higher miR-34 ISH score and lower PAK5 and ABCB1 scores were detected in the chemo-sensitive group. CONCLUSION Sirolimus increases the sensitivity of human OS cells to anticancer drugs in vitro by up-regulating miR-34b interacting with PAK1 and ABCB1. A low miR-34 level is an indicator of poor prognosis in OS patients.
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Hervouet E, Claude-Taupin A, Gauthier T, Perez V, Fraichard A, Adami P, Despouy G, Monnien F, Algros MP, Jouvenot M, Delage-Mourroux R, Boyer-Guittaut M. The autophagy GABARAPL1 gene is epigenetically regulated in breast cancer models. BMC Cancer 2015; 15:729. [PMID: 26474850 PMCID: PMC4609056 DOI: 10.1186/s12885-015-1761-4] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2015] [Accepted: 10/09/2015] [Indexed: 01/23/2023] Open
Abstract
Background The GABARAP family members (GABARAP, GABARAPL1/GEC1 and GABARAPL2 /GATE-16) are involved in the intracellular transport of receptors and the autophagy pathway. We previously reported that GABARAPL1 expression was frequently downregulated in cancer cells while a high GABARAPL1 expression is a good prognosis marker for patients with lymph node-positive breast cancer. Methods In this study, we asked using qRT-PCR, western blotting and epigenetic quantification whether the expression of the GABARAP family was regulated in breast cancer by epigenetic modifications. Results Our data demonstrated that a specific decrease of GABARAPL1 expression in breast cancers was associated with both DNA methylation and histone deacetylation and that CREB-1 recruitment on GABARAPL1 promoter was required for GABARAPL1 expression. Conclusions Our work strongly suggests that epigenetic inhibitors and CREB-1 modulators may be used in the future to regulate autophagy in breast cancer cells. Electronic supplementary material The online version of this article (doi:10.1186/s12885-015-1761-4) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Eric Hervouet
- Université de Franche-Comté, Laboratoire de Biochimie, EA3922 « Estrogènes, Expression Génique et Pathologies du Système Nerveux Central », SFR IBCT FED4234, UFR Sciences et Techniques, 16 route de Gray, 25030, Besançon Cedex, France.
| | - Aurore Claude-Taupin
- Université de Franche-Comté, Laboratoire de Biochimie, EA3922 « Estrogènes, Expression Génique et Pathologies du Système Nerveux Central », SFR IBCT FED4234, UFR Sciences et Techniques, 16 route de Gray, 25030, Besançon Cedex, France.
| | - Thierry Gauthier
- Université de Franche-Comté, Laboratoire de Biochimie, EA3922 « Estrogènes, Expression Génique et Pathologies du Système Nerveux Central », SFR IBCT FED4234, UFR Sciences et Techniques, 16 route de Gray, 25030, Besançon Cedex, France.
| | - Valérie Perez
- Université de Franche-Comté, Laboratoire de Biochimie, EA3922 « Estrogènes, Expression Génique et Pathologies du Système Nerveux Central », SFR IBCT FED4234, UFR Sciences et Techniques, 16 route de Gray, 25030, Besançon Cedex, France.
| | - Annick Fraichard
- Université de Franche-Comté, Laboratoire de Biochimie, EA3922 « Estrogènes, Expression Génique et Pathologies du Système Nerveux Central », SFR IBCT FED4234, UFR Sciences et Techniques, 16 route de Gray, 25030, Besançon Cedex, France.
| | - Pascale Adami
- Université de Franche-Comté, Laboratoire de Biochimie, EA3922 « Estrogènes, Expression Génique et Pathologies du Système Nerveux Central », SFR IBCT FED4234, UFR Sciences et Techniques, 16 route de Gray, 25030, Besançon Cedex, France.
| | - Gilles Despouy
- Université de Franche-Comté, Laboratoire de Biochimie, EA3922 « Estrogènes, Expression Génique et Pathologies du Système Nerveux Central », SFR IBCT FED4234, UFR Sciences et Techniques, 16 route de Gray, 25030, Besançon Cedex, France.
| | - Franck Monnien
- Department of Pathology, University Hospital Jean-Minjoz, 25030, Besançon, France.
| | - Marie-Paule Algros
- Department of Pathology, University Hospital Jean-Minjoz, 25030, Besançon, France.
| | - Michèle Jouvenot
- Université de Franche-Comté, Laboratoire de Biochimie, EA3922 « Estrogènes, Expression Génique et Pathologies du Système Nerveux Central », SFR IBCT FED4234, UFR Sciences et Techniques, 16 route de Gray, 25030, Besançon Cedex, France.
| | - Régis Delage-Mourroux
- Université de Franche-Comté, Laboratoire de Biochimie, EA3922 « Estrogènes, Expression Génique et Pathologies du Système Nerveux Central », SFR IBCT FED4234, UFR Sciences et Techniques, 16 route de Gray, 25030, Besançon Cedex, France.
| | - Michaël Boyer-Guittaut
- Université de Franche-Comté, Laboratoire de Biochimie, EA3922 « Estrogènes, Expression Génique et Pathologies du Système Nerveux Central », SFR IBCT FED4234, UFR Sciences et Techniques, 16 route de Gray, 25030, Besançon Cedex, France.
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Hu Z, Wang Y, Huang F, Chen R, Li C, Wang F, Goto J, Kwiatkowski DJ, Wdzieczak-Bakala J, Tu P, Liu J, Zha X, Zhang H. Brain-expressed X-linked 2 Is Pivotal for Hyperactive Mechanistic Target of Rapamycin (mTOR)-mediated Tumorigenesis. J Biol Chem 2015; 290:25756-65. [PMID: 26296882 DOI: 10.1074/jbc.m115.665208] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2015] [Indexed: 12/16/2022] Open
Abstract
Frequent alteration of upstream proto-oncogenes and tumor suppressor genes activates mechanistic target of rapamycin (mTOR) and causes cancer. However, the downstream effectors of mTOR remain largely elusive. Here we report that brain-expressed X-linked 2 (BEX2) is a novel downstream effector of mTOR. Elevated BEX2 in Tsc2(-/-) mouse embryonic fibroblasts, Pten(-/-) mouse embryonic fibroblasts, Tsc2-deficient rat uterine leiomyoma cells, and brains of neuronal specific Tsc1 knock-out mice were abolished by mTOR inhibitor rapamycin. Furthermore, BEX2 was also increased in the liver of a hepatic specific Pten knock-out mouse and the kidneys of Tsc2 heterozygous deletion mice, and a patient with tuberous sclerosis complex (TSC). mTOR up-regulation of BEX2 was mediated in parallel by both STAT3 and NF-κB. BEX2 was involved in mTOR up-regulation of VEGF production and angiogenesis. Depletion of BEX2 blunted the tumorigenesis of cells with activated mTOR. Therefore, enhanced STAT3/NF-κB-BEX2-VEGF signaling pathway contributes to hyperactive mTOR-induced tumorigenesis. BEX2 may be targeted for the treatment of the cancers with aberrantly activated mTOR signaling pathway.
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Affiliation(s)
- Zhongdong Hu
- From the State Key Laboratory of Medical Molecular Biology, Department of Physiology, Institute of Basic Medical Sciences and School of Basic Medicine, Graduate School of Peking Union Medical College, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100005, China, the Modern Research Center for Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing 100029, China
| | - Ying Wang
- the Department of Molecular Orthopaedics, Beijing Institute of Traumatology and Orthopaedics, Beijing Jishuitan Hospital, Beijing 100035, China
| | - Fuqiang Huang
- From the State Key Laboratory of Medical Molecular Biology, Department of Physiology, Institute of Basic Medical Sciences and School of Basic Medicine, Graduate School of Peking Union Medical College, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100005, China
| | - Rongrong Chen
- From the State Key Laboratory of Medical Molecular Biology, Department of Physiology, Institute of Basic Medical Sciences and School of Basic Medicine, Graduate School of Peking Union Medical College, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100005, China
| | - Chunjia Li
- From the State Key Laboratory of Medical Molecular Biology, Department of Physiology, Institute of Basic Medical Sciences and School of Basic Medicine, Graduate School of Peking Union Medical College, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100005, China
| | - Fang Wang
- From the State Key Laboratory of Medical Molecular Biology, Department of Physiology, Institute of Basic Medical Sciences and School of Basic Medicine, Graduate School of Peking Union Medical College, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100005, China
| | - June Goto
- the Division of Pediatric Neurosurgery, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio 45229
| | - David J Kwiatkowski
- the Division of Translational Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115
| | - Joanna Wdzieczak-Bakala
- the Institut de Chimie des Substances Naturelles, CNRS UPR2301, 91198 Gif sur Yvette, France
| | - Pengfei Tu
- the Modern Research Center for Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing 100029, China
| | - Jianmiao Liu
- the Sino-France Laboratory for Drug Screening, Key Laboratory of Molecular Biophysics of Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Xiaojun Zha
- the Department of Biochemistry and Molecular Biology, School of Basic Medicine, Anhui Medical University, Hefei 230032, China, and the State Key Laboratory Incubation Base of Dermatology, Ministry of National Science and Technology, Hefei 230032, China
| | - Hongbing Zhang
- From the State Key Laboratory of Medical Molecular Biology, Department of Physiology, Institute of Basic Medical Sciences and School of Basic Medicine, Graduate School of Peking Union Medical College, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100005, China,
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Liu C, DeRoo EP, Stecyk C, Wolsey M, Szuchnicki M, Hagos EG. Impaired autophagy in mouse embryonic fibroblasts null for Krüppel-like Factor 4 promotes DNA damage and increases apoptosis upon serum starvation. Mol Cancer 2015; 14:101. [PMID: 25944097 PMCID: PMC4422415 DOI: 10.1186/s12943-015-0373-6] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2014] [Accepted: 04/23/2015] [Indexed: 01/06/2023] Open
Abstract
BACKGROUND Autophagy is a major cellular process by which cytoplasmic components such as damaged organelles and misfolded proteins are recycled. Although low levels of autophagy occur in cells under basal conditions, certain cellular stresses including nutrient depletion, DNA damage, and oxidative stress are known to robustly induce autophagy. Krüppel-like factor 4 (KLF4) is a zinc-finger transcription factor activated during oxidative stress to maintain genomic stability. Both autophagy and KLF4 play important roles in response to stress and function in tumor suppression. METHODS To explore the role of KLF4 on autophagy in mouse embryonic fibroblasts (MEFs), we compared wild-type with Klf4 deficient cells. To determine the levels of autophagy, we starved MEFs for different times with Earle's balanced salts solution (EBSS). Rapamycin was used to manipulate mTOR activity and autophagy. The percentage of cells with γ-H2AX foci, a marker for DNA damage, and punctate pattern of GFP-LC3 were counted by confocal microscopy. The effects of the drug treatments, Klf4 overexpression, or Klf4 transient silencing on autophagy were analyzed using Western blot. Trypan Blue assay and flow cytometry were used to study cell viability and apoptosis, respectively. qPCR was also used to assay basal and the effects of Klf4 overexpression on Atg7 expression levels. RESULTS Here our data suggested that Klf4 (-/-) MEFs exhibited impaired autophagy, which sensitized them to cell death under nutrient deprivation. Secondly, DNA damage in Klf4-null MEFs increased after treatment with EBSS and was correlated with increased apoptosis. Thirdly, we found that Klf4 (-/-) MEFs showed hyperactive mTOR activity. Furthermore, we demonstrated that rapamycin reduced the increased level of mTOR in Klf4 (-/-) MEFs, but did not restore the level of autophagy. Finally, re-expression of Klf4 in Klf4 deficient MEFs resulted in increased levels of LC3II, a marker for autophagy, and Atg7 expression level when compared to GFP-control transfected Klf4 (-/-) MEFs. CONCLUSION Taken together, our results strongly suggest that KLF4 plays a critical role in the regulation of autophagy and suppression of mTOR activity. In addition, we showed that rapamycin decreased the level of mTOR in Klf4 (-/-) MEFs, but did not restore autophagy. This suggests that KLF4 regulates autophagy through both mTOR-dependent and independent mechanisms. Furthermore, for the first time, our findings provide novel insights into the mechanism by which KLF4 perhaps prevents DNA damage and apoptosis through activation of autophagy.
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Affiliation(s)
- Changchang Liu
- Department of Biology, Colgate University, 13 Oak Dr., Olin Hall 205A, Hamilton, NY, 13346, USA.
| | - Elise P DeRoo
- Department of Biology, Colgate University, 13 Oak Dr., Olin Hall 205A, Hamilton, NY, 13346, USA. .,Program in Cellular and Molecular Medicine, Boston Childrens Hospital, Boston, MA, 02115, USA. .,School of Medical School, Harvard University, Boston, MA, 02115, USA.
| | - Catherine Stecyk
- Department of Biology, Colgate University, 13 Oak Dr., Olin Hall 205A, Hamilton, NY, 13346, USA. .,Cummings School of Veterinary Medicine, Tufts University, North Grafton, MA, 01536, USA.
| | - Margaret Wolsey
- Department of Biology, Colgate University, 13 Oak Dr., Olin Hall 205A, Hamilton, NY, 13346, USA.
| | - Mateusz Szuchnicki
- Department of Biology, Colgate University, 13 Oak Dr., Olin Hall 205A, Hamilton, NY, 13346, USA.
| | - Engda G Hagos
- Department of Biology, Colgate University, 13 Oak Dr., Olin Hall 205A, Hamilton, NY, 13346, USA.
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Chiarini F, Evangelisti C, McCubrey JA, Martelli AM. Current treatment strategies for inhibiting mTOR in cancer. Trends Pharmacol Sci 2014; 36:124-35. [PMID: 25497227 DOI: 10.1016/j.tips.2014.11.004] [Citation(s) in RCA: 209] [Impact Index Per Article: 20.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2014] [Revised: 11/07/2014] [Accepted: 11/12/2014] [Indexed: 02/07/2023]
Abstract
Mammalian target of rapamycin (mTOR) is a Ser/Thr kinase that regulates a wide range of functions, including cell growth, proliferation, survival, autophagy, metabolism, and cytoskeletal organization. mTOR activity is dysregulated in several human disorders, including cancer. The crucial role of mTOR in cancer cell biology has stimulated interest in mTOR inhibitors, placing mTOR on the radar of the pharmaceutical industry. Several mTOR inhibitors have already undergone clinical trials for treating tumors, without great success, although mTOR inhibitors are approved for the treatment of some types of cancer, including advanced renal cell carcinoma. However, the role of mTOR inhibitors in cancer treatment continues to evolve as new compounds are continuously being disclosed. Here we review the three classes of mTOR inhibitors currently available for treating cancer patients. Moreover, we highlight efforts to identify markers of resistance and sensitivity to mTOR inhibition that could prove useful in the emerging field of personalized medicine.
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Affiliation(s)
- Francesca Chiarini
- Institute of Molecular Genetics, National Research Council, Bologna, Italy; Rizzoli Orthopedic Institute, Bologna, Italy
| | - Camilla Evangelisti
- Institute of Molecular Genetics, National Research Council, Bologna, Italy; Rizzoli Orthopedic Institute, Bologna, Italy
| | - James A McCubrey
- Department of Microbiology and Immunology, Brody School of Medicine, East Carolina University, Greenville, NC, USA
| | - Alberto M Martelli
- Department of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, Italy.
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Medvetz D, Priolo C, Henske EP. Therapeutic targeting of cellular metabolism in cells with hyperactive mTORC1: a paradigm shift. Mol Cancer Res 2014; 13:3-8. [PMID: 25298408 DOI: 10.1158/1541-7786.mcr-14-0343] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
mTORC1 is an established master regulator of cellular metabolic homeostasis, via multiple mechanisms that include altered glucose and glutamine metabolism, and decreased autophagy. mTORC1 is hyperactive in the human disease tuberous sclerosis complex (TSC), an autosomal dominant disorder caused by germline mutations in the TSC1 or TSC2 gene. In TSC-deficient cells, metabolic wiring is extensively disrupted and rerouted as a consequence of mTORC1 hyperactivation, leading to multiple vulnerabilities, including "addiction" to glutamine, glucose, and autophagy. There is synergy between two rapidly evolving trajectories: elucidating the metabolic vulnerabilities of TSC-associated tumor cells, and the development of therapeutic agents that selectively target cancer-associated metabolic defects. The current review focuses on recent work supporting the targeting of cellular metabolic dysregulation for the treatment of tumors in TSC, with relevance to the many other human neoplasms with mTORC1 hyperactivation. These data expose a fundamental paradox in the therapeutic targeting of tumor cells with hyperactive mTORC1: inhibition of mTORC1 may not represent the optimal therapeutic strategy. Inhibiting mTORC1 "fixes" the metabolic vulnerabilities, results in a cytostatic response, and closes the door to metabolic targeting. In contrast, leaving mTORC1 active allows the metabolic vulnerabilities to be targeted with the potential for a cytocidal cellular response. The insights provided here suggest that therapeutic strategies for TSC and other tumors with activation of mTORC1 are at the verge of a major paradigm shift, in which optimal clinical responses will be accomplished by targeting mTORC1-associated metabolic vulnerabilities without inhibiting mTORC1 itself.
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Affiliation(s)
- Doug Medvetz
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts
| | - Carmen Priolo
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts.
| | - Elizabeth P Henske
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts.
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Song X, Dilly AK, Kim SY, Choudry HA, Lee YJ. Rapamycin-enhanced mitomycin C-induced apoptotic death is mediated through the S6K1-Bad-Bak pathway in peritoneal carcinomatosis. Cell Death Dis 2014; 5:e1281. [PMID: 24901052 PMCID: PMC4607229 DOI: 10.1038/cddis.2014.242] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2014] [Revised: 04/29/2014] [Accepted: 05/05/2014] [Indexed: 12/15/2022]
Abstract
Peritoneal carcinomatosis (PC) is the most common secondary cancerous disease, and more effective novel regimens are needed. In this study, we identified a novel combination treatment for PC, chemotherapeutic agent mitomycin C in combination with mTOR (mammalian target of rapamycin) inhibitor rapamycin. We observed that the combination of mitomycin C and rapamycin induced synergistic cytotoxicity and apoptosis, which was mediated through an increase in caspase activation. The combination of mitomycin C and rapamycin inactivated p70 S6 ribosomal kinase (S6K1) and dephosphorylated Bad, leading to dissociation of Bcl-xL from Bak, which resulted in Bak oligomerization, mitochondria dysfunction and cytochrome c release. PF-4708671, a S6K1-specific inhibitor, enhanced the combination treatment-induced apoptosis, whereas S6K1 E389 DeltaCT-HA (S6K1 active form) dramatically decreased the induction of apoptosis. In addition, the combination treatment significantly inhibited LS174T intraperitoneal tumor growth in vivo. This study provides a preclinical rationale for apoptosis induction linked with the mTOR pathway through a combination of chemotherapeutic agents and mTOR inhibitor, and will support this combinatorial strategy to PC patients.
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Affiliation(s)
- X Song
- Department of Surgery, University of Pittsburgh Cancer Institute, School of Medicine, Hillman Cancer Center, University of Pittsburgh, Pittsburgh, PA 15213, USA
| | - A-K Dilly
- Department of Surgery, University of Pittsburgh Cancer Institute, School of Medicine, Hillman Cancer Center, University of Pittsburgh, Pittsburgh, PA 15213, USA
| | - S-Y Kim
- Department of Surgery, University of Pittsburgh Cancer Institute, School of Medicine, Hillman Cancer Center, University of Pittsburgh, Pittsburgh, PA 15213, USA
| | - H A Choudry
- Department of Surgery, University of Pittsburgh Cancer Institute, School of Medicine, Hillman Cancer Center, University of Pittsburgh, Pittsburgh, PA 15213, USA
| | - Y J Lee
- 1] Department of Surgery, University of Pittsburgh Cancer Institute, School of Medicine, Hillman Cancer Center, University of Pittsburgh, Pittsburgh, PA 15213, USA [2] Department of Pharmacology & Chemical Biology, University of Pittsburgh Cancer Institute, School of Medicine, Hillman Cancer Center, University of Pittsburgh, Pittsburgh, PA 15213, USA
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