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Yanes-Díaz J, Palao-Suay R, Aguilar MR, Riestra-Ayora JI, Ferruelo-Alonso A, Rojo del Olmo L, Vázquez-Lasa B, Sanz-Fernández R, Sánchez-Rodríguez C. Antitumor Activity of Nanoparticles Loaded with PHT-427, a Novel AKT/PDK1 Inhibitor, for the Treatment of Head and Neck Squamous Cell Carcinoma. Pharmaceutics 2021; 13:pharmaceutics13081242. [PMID: 34452203 PMCID: PMC8401941 DOI: 10.3390/pharmaceutics13081242] [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: 07/05/2021] [Revised: 08/03/2021] [Accepted: 08/07/2021] [Indexed: 02/01/2023] Open
Abstract
Currently, new treatments are required to supplement the current standard of care for head and neck squamous cell carcinoma (HNSCC). The phosphatidylinositol3-kinase (PI3K) signaling pathway is commonly altered and activated in HNSCC. PHT-427 is a dual PI3K-mammalian target of the AKT/PDK1 inhibitor; however, to the best of our knowledge, the effect of the PHT-427 inhibitor on HNSCC has not been investigated. This study aims to evaluate the antitumoral effect of PHT-427-loaded polymeric nanoparticles based on α-tocopheryl succinate (α-TOS). The in vitro activity of PHT-427 was tested in hypopharynx carcinoma squamous cells (FaDu) to measure the cell viability, PI3KCA/AKT/PDK1 gene expression, and PI3KCA/AKT/PDK1 levels. Apoptosis, epidermal growth factor receptor (EGFR), and reactive oxygen species (ROS) were also measured. The presence of PHT-427 significantly enhances its antiproliferative and proapoptotic activity by inactivating the PI3K/AKT/PDK1 pathway. Nanoparticles (NPs) effectively suppress AKT/PDK1 expression. Additionally, NPs loaded with PHT-427 produce high oxidative stress levels that induce apoptosis. In conclusion, these results are promising in the use of this nanoformulation as a PHT-427 delivery system for effective HNSCC treatment.
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Affiliation(s)
- Joaquín Yanes-Díaz
- Department Otolaryngology, Hospital Universitario de Getafe, Getafe (Madrid), Carretera de Toledo, km 12.500, 28905 Madrid, Spain; (J.Y.-D.); (J.I.R.-A.); (R.S.-F.)
| | - Raquel Palao-Suay
- Department of Polymeric Nanomaterials and Biomaterials Institute of Polymer Science and Technology CSIC, C/Juan de la Cierva, 3, 28006 Madrid, Spain; (R.P.-S.); (M.R.A.); (L.R.d.O.); (B.V.-L.)
- Biomedical Research Centre in Bioengineering Biomaterials, and Nanomedicine CIBER-BBN, 28029 Madrid, Spain
| | - María Rosa Aguilar
- Department of Polymeric Nanomaterials and Biomaterials Institute of Polymer Science and Technology CSIC, C/Juan de la Cierva, 3, 28006 Madrid, Spain; (R.P.-S.); (M.R.A.); (L.R.d.O.); (B.V.-L.)
- Biomedical Research Centre in Bioengineering Biomaterials, and Nanomedicine CIBER-BBN, 28029 Madrid, Spain
| | - Juan Ignacio Riestra-Ayora
- Department Otolaryngology, Hospital Universitario de Getafe, Getafe (Madrid), Carretera de Toledo, km 12.500, 28905 Madrid, Spain; (J.Y.-D.); (J.I.R.-A.); (R.S.-F.)
- Department of Medicine, Faculty of Biomedical and Health Sciences, Universidad Europea de Madrid, Villaviciosa de Odón, 28670 Madrid, Spain
| | - Antonio Ferruelo-Alonso
- Fundación de Investigación Biomédica del Hospital Universitario de Getafe, Carretera de Toledo, km 12.500, 28905 Madrid, Spain;
- CIBER de Enfermedades Respiratorias, Instituto de Investigación Carlos III, 28029 Madrid, Spain
| | - Luis Rojo del Olmo
- Department of Polymeric Nanomaterials and Biomaterials Institute of Polymer Science and Technology CSIC, C/Juan de la Cierva, 3, 28006 Madrid, Spain; (R.P.-S.); (M.R.A.); (L.R.d.O.); (B.V.-L.)
- Biomedical Research Centre in Bioengineering Biomaterials, and Nanomedicine CIBER-BBN, 28029 Madrid, Spain
| | - Blanca Vázquez-Lasa
- Department of Polymeric Nanomaterials and Biomaterials Institute of Polymer Science and Technology CSIC, C/Juan de la Cierva, 3, 28006 Madrid, Spain; (R.P.-S.); (M.R.A.); (L.R.d.O.); (B.V.-L.)
- Biomedical Research Centre in Bioengineering Biomaterials, and Nanomedicine CIBER-BBN, 28029 Madrid, Spain
| | - Ricardo Sanz-Fernández
- Department Otolaryngology, Hospital Universitario de Getafe, Getafe (Madrid), Carretera de Toledo, km 12.500, 28905 Madrid, Spain; (J.Y.-D.); (J.I.R.-A.); (R.S.-F.)
| | - Carolina Sánchez-Rodríguez
- Department of Medicine, Faculty of Biomedical and Health Sciences, Universidad Europea de Madrid, Villaviciosa de Odón, 28670 Madrid, Spain
- Correspondence:
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Yang R, Wang M, Zhang G, Li Y, Wang L, Cui H. POU2F2 regulates glycolytic reprogramming and glioblastoma progression via PDPK1-dependent activation of PI3K/AKT/mTOR pathway. Cell Death Dis 2021; 12:433. [PMID: 33931589 PMCID: PMC8087798 DOI: 10.1038/s41419-021-03719-3] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Revised: 04/13/2021] [Accepted: 04/15/2021] [Indexed: 01/08/2023]
Abstract
The POU Class Homeobox 2 (POU2F2) is a member of POU transcription factors family, which involves in cell immune response by regulating B cell proliferation and differentiation genes. Recent studies have shown that POU2F2 acts as tumor-promoting roles in some cancers, but the underlying mechanism remains little known. Here, we identified that the highly expressed POU2F2 significantly correlated with poor prognosis of glioblastoma (GBM) patients. POU2F2 promoted cell proliferation and regulated glycolytic reprogramming. Mechanistically, the AKT/mTOR signaling pathway played important roles in the regulation of POU2F2-mediated aerobic glycolysis and cell growth. Furthermore, we demonstrated that POU2F2 activated the transcription of PDPK1 by directly binding to its promoter. Reconstituted the expression of PDPK1 in POU2F2-knockdown GBM cells reactivated AKT/mTOR pathway and recovered cell glycolysis and proliferation, whereas this effect was abolished by the PDPK1/AKT interaction inhibitor. In addition, we showed that POU2F2-PDPK1 axis promoted tumorigenesis by regulating glycolysis in vivo. In conclusion, our findings indicate that POU2F2 leads a metabolic shift towards aerobic glycolysis and promotes GBM progression in PDPK1-dependent activation of PI3K/AKT/mTOR pathway.
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Affiliation(s)
- Rui Yang
- Key Laboratory of Precision Oncology of Shandong Higher Education, Institute of Precision Medicine, Jining Medical University, Jining, China. .,State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, China.
| | - Mei Wang
- Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi, China
| | - Guanghui Zhang
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, China.,Cancer center, Medical Research Institute, Southwest University, Chongqing, China
| | - Yanping Li
- Key Laboratory of Precision Oncology of Shandong Higher Education, Institute of Precision Medicine, Jining Medical University, Jining, China
| | - Lulin Wang
- Key Laboratory of Molecular Pharmacology, Liaocheng People's Hospital, Liaocheng, China
| | - Hongjuan Cui
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, China. .,Cancer center, Medical Research Institute, Southwest University, Chongqing, China.
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3
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Fan L, Zhang CJ, Zhu L, Chen J, Zhang Z, Liu P, Cao X, Meng H, Xu Y. FasL-PDPK1 Pathway Promotes the Cytotoxicity of CD8 + T Cells During Ischemic Stroke. Transl Stroke Res 2020; 11:747-761. [PMID: 32036560 DOI: 10.1007/s12975-019-00749-0] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2019] [Revised: 10/02/2019] [Accepted: 10/28/2019] [Indexed: 12/19/2022]
Abstract
CD8+ T cells are recognized as key players in exacerbation of ischemic stroke; however, the underlying mechanism in modulating the function of CD8+ T cells has not been completely elucidated. Here, we uncovered that FasL enhanced the cytotoxicity of CD8+ T cells to neurons after ischemic stroke. Inactivation of FasL specific on CD8+ T cells protected against brain damage and neuron loss. Proteomic analysis identified that PDPK1 functioned downstream of FasL signaling and inhibition of PDPK1 effectively reduced cytotoxicity of CD8+ T cells and improved ischemic neurological deficits. Taken together, these results highlight an intrinsic FasL-PDPK1 pathway regulating the cytotoxicity of CD8+ T cells in ischemic stroke.
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Affiliation(s)
- Lizhen Fan
- Department of Neurology, Drum Tower Hospital, Medical School and The State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing, 210008, China.,Jiangsu Key Laboratory for Molecular Medicine, Medical School of Nanjing University, Nanjing, 210008, China
| | - Cun-Jin Zhang
- Department of Neurology, Drum Tower Hospital, Medical School and The State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing, 210008, China.,Jiangsu Key Laboratory for Molecular Medicine, Medical School of Nanjing University, Nanjing, 210008, China
| | - Liwen Zhu
- Department of Neurology, Drum Tower Hospital, Medical School and The State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing, 210008, China.,Jiangsu Key Laboratory for Molecular Medicine, Medical School of Nanjing University, Nanjing, 210008, China
| | - Jian Chen
- Department of Neurology, Drum Tower Hospital, Medical School and The State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing, 210008, China.,Jiangsu Key Laboratory for Molecular Medicine, Medical School of Nanjing University, Nanjing, 210008, China
| | - Zhi Zhang
- Department of Neurology, Drum Tower Hospital, Medical School and The State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing, 210008, China.,Jiangsu Key Laboratory for Molecular Medicine, Medical School of Nanjing University, Nanjing, 210008, China
| | - Pinyi Liu
- Department of Neurology, Drum Tower Hospital, Medical School and The State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing, 210008, China.,Jiangsu Key Laboratory for Molecular Medicine, Medical School of Nanjing University, Nanjing, 210008, China
| | - Xiang Cao
- Department of Neurology, Drum Tower Hospital, Medical School and The State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing, 210008, China.,Jiangsu Key Laboratory for Molecular Medicine, Medical School of Nanjing University, Nanjing, 210008, China
| | - Hailan Meng
- Department of Neurology, Drum Tower Hospital, Medical School and The State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing, 210008, China.,Jiangsu Key Laboratory for Molecular Medicine, Medical School of Nanjing University, Nanjing, 210008, China
| | - Yun Xu
- Department of Neurology, Drum Tower Hospital, Medical School and The State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing, 210008, China. .,Jiangsu Key Laboratory for Molecular Medicine, Medical School of Nanjing University, Nanjing, 210008, China. .,Jiangsu Province Stroke Center for Diagnosis and Therapy, Nanjing, 210008, China. .,Nanjing Neuropsychiatry Clinic Medical Center, Nanjing, 210008, China.
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Liang C, Zhang N, Tan Q, Liu S, Luo R, Wang Y, Shi Y, Han X. CT-707 Overcomes Resistance of Crizotinib through Activating PDPK1- AKT1 Pathway by Targeting FAK. Curr Cancer Drug Targets 2018; 19:655-665. [PMID: 30381078 DOI: 10.2174/1568009618666181031152140] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2018] [Revised: 08/23/2018] [Accepted: 10/18/2018] [Indexed: 01/21/2023]
Abstract
BACKGROUND Crizotinib established the position of anaplastic lymphoma kinase-tyrosine kinase inhibitors (ALK-TKI) in the treatment of non-small cell lung cancer (NSCLC) while the therapy- resistance hindered those patients from benefitting continuously from the treatment. CT-707 is an inhibitor of ALK/focal adhesion kinase (FAK) and IGFR-1. H2228CR (crizotinib resistance, CR) and H3122CR NSCLC cell lines were generated from the parental cell line H2228 (EML4-ALK, E6a/b:A20, variant 3) and H3122(EML4-ALK, E13:A20, variant 1), respectively. METHODS We investigated the antitumor effects CT-707 exerted against H3122CR in vitro /vivo. RESULTS Importantly, our study provided evidence that CT-707 overcomes resistance to crizotinib through activating PDPK1-AKT1 pathway by targeting FAK. Meanwhile, by using an in-vivo H3122CR xenograft model, we found CT-707 inhibited tumor growth significantly without obvious side effects. CONCLUSION These findings indicate that CT-707 may be a promising therapeutic agent against crizotinib- resistance in NSCLC.
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Affiliation(s)
- Caixia Liang
- Department of Medical Oncology, Beijing Key Laboratory of Clinical Study on Anticancer Molecular Targeted Drugs, National Cancer Center/National Clinical Research Center for Cancer/ Cancer Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100021, China
| | - Ningning Zhang
- Department of Medical Oncology, Beijing Key Laboratory of Clinical Study on Anticancer Molecular Targeted Drugs, National Cancer Center/National Clinical Research Center for Cancer/ Cancer Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100021, China
| | - Qiaoyun Tan
- Department of Medical Oncology, Beijing Key Laboratory of Clinical Study on Anticancer Molecular Targeted Drugs, National Cancer Center/National Clinical Research Center for Cancer/ Cancer Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100021, China
| | - Shuxia Liu
- Department of Medical Oncology, Beijing Key Laboratory of Clinical Study on Anticancer Molecular Targeted Drugs, National Cancer Center/National Clinical Research Center for Cancer/ Cancer Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100021, China.,Department of Clinical Laboratory, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, 100021, China
| | - Rongrong Luo
- Department of Medical Oncology, Beijing Key Laboratory of Clinical Study on Anticancer Molecular Targeted Drugs, National Cancer Center/National Clinical Research Center for Cancer/ Cancer Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100021, China.,Department of Clinical Laboratory, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, 100021, China
| | - Yanrong Wang
- Department of Medical Oncology, Beijing Key Laboratory of Clinical Study on Anticancer Molecular Targeted Drugs, National Cancer Center/National Clinical Research Center for Cancer/ Cancer Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100021, China
| | - Yuankai Shi
- Department of Medical Oncology, Beijing Key Laboratory of Clinical Study on Anticancer Molecular Targeted Drugs, National Cancer Center/National Clinical Research Center for Cancer/ Cancer Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100021, China
| | - Xiaohong Han
- Department of Medical Oncology, Beijing Key Laboratory of Clinical Study on Anticancer Molecular Targeted Drugs, National Cancer Center/National Clinical Research Center for Cancer/ Cancer Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100021, China.,Department of Clinical Laboratory, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, 100021, China
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Differential Expression Profile of lncRNAs from Primary Human Hepatocytes Following DEET and Fipronil Exposure. Int J Mol Sci 2017; 18:ijms18102104. [PMID: 28991164 PMCID: PMC5666786 DOI: 10.3390/ijms18102104] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2017] [Revised: 10/04/2017] [Accepted: 10/04/2017] [Indexed: 11/21/2022] Open
Abstract
While the synthesis and use of new chemical compounds is at an all-time high, the study of their potential impact on human health is quickly falling behind, and new methods are needed to assess their impact. We chose to examine the effects of two common environmental chemicals, the insect repellent N,N-diethyl-m-toluamide (DEET) and the insecticide fluocyanobenpyrazole (fipronil), on transcript levels of long non-protein coding RNAs (lncRNAs) in primary human hepatocytes using a global RNA-Seq approach. While lncRNAs are believed to play a critical role in numerous important biological processes, many still remain uncharacterized, and their functions and modes of action remain largely unclear, especially in relation to environmental chemicals. RNA-Seq showed that 100 µM DEET significantly increased transcript levels for 2 lncRNAs and lowered transcript levels for 18 lncRNAs, while fipronil at 10 µM increased transcript levels for 76 lncRNAs and decreased levels for 193 lncRNAs. A mixture of 100 µM DEET and 10 µM fipronil increased transcript levels for 75 lncRNAs and lowered transcript levels for 258 lncRNAs. This indicates a more-than-additive effect on lncRNA transcript expression when the two chemicals were presented in combination versus each chemical alone. Differentially expressed lncRNA genes were mapped to chromosomes, analyzed by proximity to neighboring protein-coding genes, and functionally characterized via gene ontology and molecular mapping algorithms. While further testing is required to assess the organismal impact of changes in transcript levels, this initial analysis links several of the dysregulated lncRNAs to processes and pathways critical to proper cellular function, such as the innate and adaptive immune response and the p53 signaling pathway.
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Targeting 3-phosphoinositide-dependent protein kinase 1 associated with drug-resistant renal cell carcinoma using new oridonin analogs. Cell Death Dis 2017; 8:e2701. [PMID: 28333136 PMCID: PMC5386527 DOI: 10.1038/cddis.2017.121] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2016] [Revised: 02/15/2017] [Accepted: 02/16/2017] [Indexed: 01/06/2023]
Abstract
The current agents used for renal cell carcinoma (RCC) only exhibit the moderate response rate among patients. Development of drug resistance eventually fuels the need of either more potent drugs or new drugs to target the resistant pathways. Oridonin is a diterpenoid isolated from the Chinese medicinal herb Rabdosia rubescens and has been shown to have antitumor activities in many cancers. We previously developed new synthetic methodologies to modify structurally diversified diterpenoids and designed a series of nitrogen-enriched oridonin analogs. In this study, we screened a variety of oridonin analogs based on their cytotoxicity using MTT assay and identify the most potent candidate, namely, CYD-6-17. CYD-6-17 exhibited a high potency to inhibit the in vitro growth of several drug-resistant RCC cells as well as endothelial cells stimulated by tumor cells at nanomolar range. Delivery of CYD-6-17 significantly inhibited RCC tumor growth using xenograft model. Mechanistically, it targeted the 3-phosphoinositide-dependent protein kinase 1 gene that appeared to be a potent regulator of AKT and was associated with patient survival after targeted therapies. This offers a new rational therapeutic regimen of CYD-6-17 to drug-resistant RCC based on its novel mechanism of action.
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Das TP, Suman S, Papu John AMS, Pal D, Edwards A, Alatassi H, Ankem MK, Damodaran C. Activation of AKT negatively regulates the pro-apoptotic function of death-associated protein kinase 3 (DAPK3) in prostate cancer. Cancer Lett 2016; 377:134-9. [PMID: 27126362 PMCID: PMC4884664 DOI: 10.1016/j.canlet.2016.04.028] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2016] [Revised: 04/14/2016] [Accepted: 04/17/2016] [Indexed: 01/10/2023]
Abstract
This is the first study that demonstrates the inverse correlation of AKT activation and down-regulation of tumor suppressor protein, DAPK-3, in CaP cell lines as well as human prostate tumor tissues that correlate with disease progression. Either silencing AKT or overexpressing DAPK-3 induces apoptosis in Castration Resistant Prostate Cancer cells.
The activation of AKT governs many signaling pathways and promotes cell growth and inhibits apoptosis in human malignancies including prostate cancer (CaP). Here, we investigated the molecular association between AKT activation and the function of death-associated protein kinase 3 (DAPK3) in CaP. An inverse correlation of pAKT and DAPK3 expression was seen in a panel of CaP cell lines. Inhibition of AKT by wortmannin/LY294002 or overexpression of DAPK3 reverts the proliferative function of AKT in CaP cells. On the other hand, ectopic expression of AKT inhibited DAPK3 function and induced proliferation of CaP cells. In addition, AKT over-expressed tumors exhibit aggressive growth when compared to control vector in xenograft models. The immunohistochemistry results revealed a down-regulation of DAPK3 expression in AKT over-expressed tumors as compared to control tumors. Finally, we examined the expression pattern of AKT and DAPK3 in human CaP specimens – the expected gradual increase and nuclear localization of pAKT was seen in higher Gleason score samples versus benign hyperplasia (BPH). On the contrary, reduced expression of DAPK3 was seen in higher Gleason stages versus BPH. This suggests that inhibition of DAPK3 may be a contributing factor to the carcinogenesis of the prostate. Understanding the mechanism by which AKT negatively regulates DAPK3 function may suggest whether DAPK3 can be a therapeutic target for CaP.
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Affiliation(s)
- Trinath P Das
- Department of Urology, University of Louisville, Louisville, KY, USA
| | - Suman Suman
- Department of Urology, University of Louisville, Louisville, KY, USA
| | | | - Deeksha Pal
- Department of Urology, University of Louisville, Louisville, KY, USA
| | - Angelena Edwards
- Department of Urology, University of Louisville, Louisville, KY, USA
| | - Houda Alatassi
- Department of Pathology, University of Louisville, Louisville, KY, USA
| | - Murali K Ankem
- Department of Urology, University of Louisville, Louisville, KY, USA
| | - Chendil Damodaran
- Department of Urology, University of Louisville, Louisville, KY, USA.
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Mäemets-Allas K, Belitškin D, Jaks V. The inhibition of Akt-Pdpk1 interaction efficiently suppresses the growth of murine primary liver tumor cells. Biochem Biophys Res Commun 2016; 474:118-125. [PMID: 27103434 DOI: 10.1016/j.bbrc.2016.04.082] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2016] [Accepted: 04/18/2016] [Indexed: 12/12/2022]
Abstract
The lack of primary liver tumor cells has hampered testing of potential chemotherapeutic agents in vitro. To overcome this issue we developed a primary mouse liver tumor cell line K07074. The K07074 cells were immortal, exhibited a biliary phenotype, formed colonies in soft agar and displayed an increase in Hedgehog, Notch and Akt signaling. To study the effect of single and combined inhibition of the liver tumor-related pathways on the growth of K07074 cells we treated these with small-molecule antitumor agents. While the inhibition of Akt and Notch pathways strongly inhibited the growth of K07074 cells the inhibition of Wnt and Hedgehog pathways was less efficient in cell growth suppression. Interestingly, the inhibition of Akt pathway at the level of Akt-Pdpk1 interaction was sufficient to suppress the growth of tumor cells and no significant additive effect could be detected when co-treated with the inhibitors of Wnt, Hedgehog or Notch pathways. Only when suboptimal doses of Akt-Pdpk1 interaction inhibitor NSC156529 were used an additive effect with Notch inhibition was seen. We conclude that the Akt pathway inhibitor NSC156529 is potentially useful as single treatment for liver tumors with hyperactivated Akt signaling.
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Affiliation(s)
| | - Denis Belitškin
- Institute of Molecular and Cell Biology, University of Tartu, Tartu, Estonia
| | - Viljar Jaks
- Institute of Molecular and Cell Biology, University of Tartu, Tartu, Estonia; Karolinska Institutet, Stockholm, Sweden.
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