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Piperi C, Saurty-Seerunghen MS, Levidou G, Sepsa A, Trigka EA, Klonou A, Markouli M, Strepkos D, Spyropoulou A, Kanakoglou DS, Lakiotaki E, Karatrasoglou EA, Boviatsis E, El-Habr EA, Korkolopoulou P. Glioma Cells Expressing High Levels of ALDH5A1 Exhibit Enhanced Migration Transcriptional Signature in Patient Tumors. Neurotherapeutics 2023; 20:881-895. [PMID: 36976494 PMCID: PMC10275844 DOI: 10.1007/s13311-023-01354-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/10/2023] [Indexed: 03/29/2023] Open
Abstract
Accumulating data shows that altered metabolic activity contributes to glioma development. Recently, modulation of SSADH (succinic semialdehyde dehydrogenase) expression, implicated in the catabolism of GABA neurotransmitter, was shown to impact glioma cell properties, such as proliferation, self-renewal and tumorigenicity. The purpose of this study was to investigate the clinical significance of SSADH expression in human gliomas. Using public single-cell RNA-sequencing data from glioma surgical resections, we initially grouped cancer cells according to ALDH5A1 (Aldehyde dehydrogenase 5 family member A1) expression, which encodes SSADH. Gene ontology enrichment analysis of genes differentially expressed between cancer cells expressing high or low levels of ALDH5A1, highlighted enrichment in genes implicated in cell morphogenesis and motility. In glioblastoma cell lines, ALDH5A1 knockdown inhibited cell proliferation, induced apoptosis and reduced their migratory potential. This was accompanied by a reduction in the mRNA levels of the adherens junction molecule ADAM-15 and deregulation in the expression of EMT biomarkers, with increased CDH1 and decreased vimentin mRNA levels. Evaluation of SSADH expression in a cohort of 95 gliomas using immunohistochemistry showed that SSADH expression was significantly elevated in cancer tissues compared to normal brain tissues, without any significant correlation with clinicopathological characteristics. In summary, our data show that SSADH is upregulated in glioma tissues irrespective of the histological grade and its expression sustains glioma cell motility.
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Affiliation(s)
- Christina Piperi
- Department of Biological Chemistry, National and Kapodistrian University of Athens, Athens, Greece
| | - Mirca S Saurty-Seerunghen
- CNRS UMR8246, Inserm U1130, Sorbonne Université, Neuroscience Paris Seine-IBPS Laboratory, Paris, France
| | - Georgia Levidou
- Department of Pathology, Medical School, Klinikum Nuremberg, Paracelsus University, Nuremberg, Germany
| | - Athanasia Sepsa
- Department of Pathology, Medical School, National and Kapodistrian University of Athens, 75 M. Asias Street, Athens, Greece
| | - Eleni-Andriana Trigka
- Department of Pathology, Medical School, National and Kapodistrian University of Athens, 75 M. Asias Street, Athens, Greece
| | - Alexia Klonou
- Department of Biological Chemistry, National and Kapodistrian University of Athens, Athens, Greece
| | - Mariam Markouli
- Department of Biological Chemistry, National and Kapodistrian University of Athens, Athens, Greece
| | - Dimitrios Strepkos
- Department of Biological Chemistry, National and Kapodistrian University of Athens, Athens, Greece
| | - Anastasia Spyropoulou
- Department of Biological Chemistry, National and Kapodistrian University of Athens, Athens, Greece
| | - Dimitrios S Kanakoglou
- Department of Pathology, Medical School, National and Kapodistrian University of Athens, 75 M. Asias Street, Athens, Greece.
| | - Eleftheria Lakiotaki
- Department of Pathology, Medical School, National and Kapodistrian University of Athens, 75 M. Asias Street, Athens, Greece
| | - Eleni A Karatrasoglou
- Department of Pathology, Medical School, National and Kapodistrian University of Athens, 75 M. Asias Street, Athens, Greece
| | - Efstathios Boviatsis
- Department of Neurosurgery, Attikon University Hospital, National and Kapodistrian University of Athens, Athens, Greece
| | - Elias A El-Habr
- CNRS UMR8246, Inserm U1130, Sorbonne Université, Neuroscience Paris Seine-IBPS Laboratory, Paris, France
| | - Penelope Korkolopoulou
- Department of Pathology, Medical School, National and Kapodistrian University of Athens, 75 M. Asias Street, Athens, Greece.
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2
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Chalasti M, Iordanou C, Kratiras Z, Stylianaki A, Trigka EA, Lakiotaki E, Makedou K, Iliadis S, Zografos KG, Dimitroulis D, Chrisofos M, Patsouris E, Zografos GC, Bouboulis GC, Papalois AE. Experimental isolation and preservation of solid organs before transplantation: effects of pretreatment using four different molecules. J Int Med Res 2021; 48:300060520933452. [PMID: 32602766 PMCID: PMC7328361 DOI: 10.1177/0300060520933452] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
OBJECTIVES In transplantation surgery, the ischaemic organ and reperfusion impairment after cold storage remains a considerable risk factor for impaired function and potential failure of the grafted organ. Substantial logistical efforts have been undertaken to reduce the cold ischaemic time because the demand for available transplant organs and the periods of cold ischaemia are increasing. METHODS Four molecules were investigated (erythropoietin, sildenafil, lazaroid [U74389G], octreotide) in individual intravenous infusions 1 hour before the organ was harvested. This study was performed in 30 healthy landrace/large-white pigs (male; >10 weeks old; average weight, 22 ± 2 kg) in groups of six. The organs were studied at harvest, and at 8 and 24 hours post-harvest. RESULTS The lazaroid molecule increased malondialdehyde (MDA) levels in the liver and pancreas at 8 hours. Hepatic lazaroid molecules improved liver histology at 8 and 24 hours. For kidneys, erythropoietin had a positive effect at 24 hours post-harvest. For the pancreas, octreotide showed better performance. In the lungs, there was less interstitial oedema with erythropoietin and lazaroid compared with the control group at 8 hours post-harvest. CONCLUSION All molecules had a positive effect and decreased ischaemia/reperfusion graft injury. Thus, pretreatment before organ harvest has a beneficial role.
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Affiliation(s)
- Maria Chalasti
- Experimental, Educational and Research Centre, ELPEN, Pikermi, Athens, Greece.,First Department of Propaedeutic Surgery, University of Athens, School of Medicine, Hippocration Hospital, Athens, Greece
| | - Christos Iordanou
- Experimental, Educational and Research Centre, ELPEN, Pikermi, Athens, Greece.,First Department of Propaedeutic Surgery, University of Athens, School of Medicine, Hippocration Hospital, Athens, Greece
| | - Zisis Kratiras
- Experimental, Educational and Research Centre, ELPEN, Pikermi, Athens, Greece.,First Department of Propaedeutic Surgery, University of Athens, School of Medicine, Hippocration Hospital, Athens, Greece
| | - Aikaterini Stylianaki
- Experimental, Educational and Research Centre, ELPEN, Pikermi, Athens, Greece.,First Department of Propaedeutic Surgery, University of Athens, School of Medicine, Hippocration Hospital, Athens, Greece
| | - Eleni-Andriana Trigka
- First Department of Pathology, University of Athens, School of Medicine, Athens, Greece
| | - Eleftheria Lakiotaki
- First Department of Pathology, University of Athens, School of Medicine, Athens, Greece
| | - Kali Makedou
- Laboratory of Biochemistry, School of Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Greece
| | - Stavros Iliadis
- Laboratory of Biochemistry, School of Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Greece
| | - Konstantinos G Zografos
- Experimental, Educational and Research Centre, ELPEN, Pikermi, Athens, Greece.,First Department of Propaedeutic Surgery, University of Athens, School of Medicine, Hippocration Hospital, Athens, Greece
| | - Dimitrios Dimitroulis
- Second Department of Propaedeutic Surgery, University of Athens, School of Medicine, Laikon Hospital, Athens, Greece
| | - Michail Chrisofos
- Second Department of Urology, University of Athens, Sismanoglio General Hospital, Athens, Greece
| | - Efstratios Patsouris
- First Department of Pathology, University of Athens, School of Medicine, Athens, Greece
| | - Georgios C Zografos
- First Department of Propaedeutic Surgery, University of Athens, School of Medicine, Hippocration Hospital, Athens, Greece
| | - George C Bouboulis
- Experimental, Educational and Research Centre, ELPEN, Pikermi, Athens, Greece.,First Department of Propaedeutic Surgery, University of Athens, School of Medicine, Hippocration Hospital, Athens, Greece
| | - Apostolos E Papalois
- Experimental, Educational and Research Centre, ELPEN, Pikermi, Athens, Greece.,First Department of Propaedeutic Surgery, University of Athens, School of Medicine, Hippocration Hospital, Athens, Greece.,European University Cyprus, School of Medicine, Nicosia, Cyprus
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3
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Karamatsoukis SL, Trigka EA, Stasinopoulou M, Stavridou A, Zacharioudaki A, Tsarea K, Karamperi M, Pittaras T, Papadopoulos O, Patsouris E, Nikiteas N, Zografos GC, Papalois AE. Beneficial Effect of U-74389 G and Sildenafil in An Experimental Model of Flap Ischemia/Reperfusion Injury in Swine. Histological and Biochemical Evaluation of the Model. J INVEST SURG 2018; 33:391-403. [PMID: 30499737 DOI: 10.1080/08941939.2018.1524527] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Purpose of the study: Tissue reconstruction after burns, tumor excisions, infections or injuries is a frequent surgical challenge to avoid Ischemia-reperfusion injury. Lazaroids and sildenafil, through their mechanisms of action, have been studied for their protective effects on various organs subjected to IRI. In this study, we aimed to evaluate the therapeutic potential of U-74389G and sildenafil in a swine model of ischemia and reperfusion injury of latissimus dorsi flap. Materials and methods: Forty-two Landrace male pigs, weighing 28-35 kg, were equally (n = 6) randomized into the following groups: (a) Group I: control, (b) Group II: administration of U-74389G after ischemia, (c) Group III: administration of sildenafil after ischemia, (d) Group IV: administration of U-74389G and sildenafil after ischemia, (e) Group V: administration of U-74389G prior to ischemia, (f) Group VI: administration of sildenafil prior to ischemia, and (g) Group VII: administration of U-74389G and sildenafil prior to ischemia. Blood and tissue sampling was conducted before ischemia, 15 and 30 min after occlusion, 30, 60, 90, and 120 min after reperfusion. Results: Statistically significant reduction (p < 0.05) was detected in lymphocytes and polymorphonuclear leukocytes concentrations as well as in the appearance of edema after histopathologic evaluation of the ischemic tissue, especially in the groups of combined treatment. Measurements of malondialdeyde and tumour necrosis factor alpha in tissues revealed a significant decrease (p < 0.001) of these markers in the treatment groups when compared to the control, particularly in the latest estimated timepoints. Conclusions: The synergistic action of U-74389G and sildenafil seems protective and promising in cases of flap IRI during tissue reconstruction surgery.
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Affiliation(s)
- Stavros-Loukas Karamatsoukis
- 1st Department of Propaedeutic Surgery, University of Athens, School of Medicine, Hippocration Hospital, Athens, Greece
| | - Eleni-Andriana Trigka
- 1st Department of Pathology, University of Athens, School of Medicine, Athens, Greece
| | - Marianna Stasinopoulou
- Center of Clinical, Experimental Surgery and Translational Research, Biomedical Research Foundation, Academy of Athens, Greece
| | - Antigoni Stavridou
- Laboratory of Chemistry-Biochemistry-Physical Chemistry of Foods, Department of Nutrition and Dietetics, School of Health Science and Education, Harokopio University, Kallithea, Greece
| | | | | | | | - Theodoros Pittaras
- Hematology Laboratory - Blood Bank, University of Athens School of Medicine, Aretaieion Hospital, Athens, Greece
| | - Othon Papadopoulos
- Department of Plastic Surgery, University of Athens, School of Medicine, Athens, Greece
| | - Efstratios Patsouris
- 1st Department of Pathology, University of Athens, School of Medicine, Athens, Greece
| | - Nikolaos Nikiteas
- N.S. Christeas Laboratory of Experimental Surgery and Surgical Research, University of Athens, School of Medicine, Athens, Greece
| | - Georgios C Zografos
- 1st Department of Propaedeutic Surgery, University of Athens, School of Medicine, Hippocration Hospital, Athens, Greece
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Liontos M, Trigka EA, Korkolopoulou P, Tzannis K, Lainakis G, Koutsoukos K, Kostouros E, Lykka M, Papandreou CN, Karavasilis V, Christodoulou C, Papatsoris A, Skolarikos A, Varkarakis I, Adamakis I, Alamanis C, Stravodimos K, Mitropoulos D, Deliveliotis C, Constantinidis CA, Saetta A, Patsouris E, Dimopoulos MΑ, Bamias A. Expression and prognostic significance of VEGF and mTOR pathway proteins in metastatic renal cell carcinoma patients: a prognostic immunohistochemical profile for kidney cancer patients. World J Urol 2016; 35:411-419. [PMID: 27395374 DOI: 10.1007/s00345-016-1890-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2016] [Accepted: 06/29/2016] [Indexed: 01/13/2023] Open
Abstract
PURPOSE To identify prognostic molecular profiles in patients with mRCC treated with sunitinib, we performed immunohistochemical analysis for VEGF and PI3K/Akt/mTOR pathway components. METHODS The immunohistochemical expression of VEGF, p85α, p110γ, PTEN, p-Akt, p-mTOR, p-4E-BP1 and p-p70S6K was studied in 79 patients with mRCC who received first-line treatment with sunitinib. Expression was correlated with clinicopathological features and survival. RESULTS VEGF was highly expressed (median H-Score 150), while positivity for the markers of the PI3K/Akt/mTOR pathway was: p85α 43/66 (65 %), p110γ41/60 (68 %), PTEN 32/64 (50 %), p-Akt57/63 (90 %), p-mTOR48/64 (75 %), p-4E-BP1 58/64 (90 %) and p-p70S6K 60/65 (92 %). No single immunohistochemical marker was found to have prognostic significance. Instead, the combination of increased p-mTOR and low VEGF expression was adversely correlated with overall survival (OS) (3.2 vs. 16.9 months, P = 0.001). CONCLUSION Immunohistochemistry for VEGF and p-mTOR proteins may discriminate patients refractory to first-line sunitinib with poor prognosis. Prospective validation of our findings is needed.
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Affiliation(s)
- Michalis Liontos
- Oncology Unit, Department of Clinical Therapeutics, Alexandra Hospital, School of Medicine, National and Kapodistrian University of Athens, 80 V.Sofias Ave, 11528, Athens, Greece.
| | - Eleni-Andriana Trigka
- 1st Department of Pathology, Laiko Hospital, School of Medicine, National and Kapodistrian University of Athens, Athens, Greece
| | - Penelope Korkolopoulou
- 1st Department of Pathology, Laiko Hospital, School of Medicine, National and Kapodistrian University of Athens, Athens, Greece
| | - Kimon Tzannis
- Oncology Unit, Department of Clinical Therapeutics, Alexandra Hospital, School of Medicine, National and Kapodistrian University of Athens, 80 V.Sofias Ave, 11528, Athens, Greece.,Hellenic GenitoUrinary Cancer Group, Athens, Greece
| | - Giorgos Lainakis
- Oncology Unit, Department of Clinical Therapeutics, Alexandra Hospital, School of Medicine, National and Kapodistrian University of Athens, 80 V.Sofias Ave, 11528, Athens, Greece
| | - Konstantinos Koutsoukos
- Oncology Unit, Department of Clinical Therapeutics, Alexandra Hospital, School of Medicine, National and Kapodistrian University of Athens, 80 V.Sofias Ave, 11528, Athens, Greece
| | - Efthymios Kostouros
- Oncology Unit, Department of Clinical Therapeutics, Alexandra Hospital, School of Medicine, National and Kapodistrian University of Athens, 80 V.Sofias Ave, 11528, Athens, Greece
| | - Maria Lykka
- Oncology Unit, Department of Clinical Therapeutics, Alexandra Hospital, School of Medicine, National and Kapodistrian University of Athens, 80 V.Sofias Ave, 11528, Athens, Greece
| | - Christos N Papandreou
- Department of Medical Oncology, Faculty of Medicine, School of Health Sciences, University of Thessaly, Larissa, Greece
| | - Vassilis Karavasilis
- Department of Medical Oncology, "Papageorgiou" Hospital, School of Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | | | - Athanasios Papatsoris
- 2nd Department of Urology, Sismanoglio Hospital, School of Medicine, National and Kapodistrian University of Athens, Athens, Greece.,Hellenic GenitoUrinary Cancer Group, Athens, Greece
| | - Andreas Skolarikos
- 2nd Department of Urology, Sismanoglio Hospital, School of Medicine, National and Kapodistrian University of Athens, Athens, Greece.,Hellenic GenitoUrinary Cancer Group, Athens, Greece
| | - Ioannis Varkarakis
- 2nd Department of Urology, Sismanoglio Hospital, School of Medicine, National and Kapodistrian University of Athens, Athens, Greece.,Hellenic GenitoUrinary Cancer Group, Athens, Greece
| | - Ioannis Adamakis
- 1st Department of Urology, Laiko Hospital, School of Medicine, National and Kapodistrian University of Athens, Athens, Greece
| | - Christos Alamanis
- 1st Department of Urology, Laiko Hospital, School of Medicine, National and Kapodistrian University of Athens, Athens, Greece
| | - Konstantinos Stravodimos
- Hellenic GenitoUrinary Cancer Group, Athens, Greece.,1st Department of Urology, Laiko Hospital, School of Medicine, National and Kapodistrian University of Athens, Athens, Greece
| | - Dionysios Mitropoulos
- Hellenic GenitoUrinary Cancer Group, Athens, Greece.,1st Department of Urology, Laiko Hospital, School of Medicine, National and Kapodistrian University of Athens, Athens, Greece
| | - Charalambos Deliveliotis
- 2nd Department of Urology, Sismanoglio Hospital, School of Medicine, National and Kapodistrian University of Athens, Athens, Greece.,Hellenic GenitoUrinary Cancer Group, Athens, Greece
| | - Constantinos A Constantinidis
- Hellenic GenitoUrinary Cancer Group, Athens, Greece.,1st Department of Urology, Laiko Hospital, School of Medicine, National and Kapodistrian University of Athens, Athens, Greece
| | - Angelica Saetta
- 1st Department of Pathology, Laiko Hospital, School of Medicine, National and Kapodistrian University of Athens, Athens, Greece
| | - Efstratios Patsouris
- 1st Department of Pathology, Laiko Hospital, School of Medicine, National and Kapodistrian University of Athens, Athens, Greece
| | - Meletios Α Dimopoulos
- Oncology Unit, Department of Clinical Therapeutics, Alexandra Hospital, School of Medicine, National and Kapodistrian University of Athens, 80 V.Sofias Ave, 11528, Athens, Greece.,Hellenic GenitoUrinary Cancer Group, Athens, Greece
| | - Aristotelis Bamias
- Oncology Unit, Department of Clinical Therapeutics, Alexandra Hospital, School of Medicine, National and Kapodistrian University of Athens, 80 V.Sofias Ave, 11528, Athens, Greece.,Hellenic GenitoUrinary Cancer Group, Athens, Greece
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5
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Kostaki M, Manona AD, Stavraka I, Korkolopoulou P, Levidou G, Trigka EA, Christofidou E, Champsas G, Stratigos AJ, Katsambas A, Papadopoulos O, Piperi C, Papavassiliou AG. High-frequency p16(INK) (4A) promoter methylation is associated with histone methyltransferase SETDB1 expression in sporadic cutaneous melanoma. Exp Dermatol 2014; 23:332-8. [PMID: 24673285 DOI: 10.1111/exd.12398] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/26/2014] [Indexed: 12/20/2022]
Abstract
Epigenetic mechanisms participate in melanoma development and progression. The effect of histone modifications and their catalysing enzymes over euchromatic promoter DNA methylation in melanoma remains unclear. This study investigated the potential association of p16(INK) (4A) promoter methylation with histone methyltransferase SETDB1 expression in Greek patients with sporadic melanoma and their correlation with clinicopathological characteristics. Promoter methylation was detected by methylation-specific PCR in 100 peripheral blood samples and 58 melanoma tissues from the same patients. Cell proliferation (Ki-67 index), p16(INK) (4A) and SETDB1 expression were evaluated by immunohistochemistry. High-frequency promoter methylation (25.86%) was observed in tissue samples and correlated with increased cell proliferation (P = 0.0514). p16(INK) (4A) promoter methylation was higher in vertical growth-phase (60%) melanomas than in radial (40%, P = 0.063) and those displaying epidermal involvement (P = 0.046). Importantly, p16(INK) (4A) methylation correlated with increased melanoma thickness according to Breslow index (P = 0.0495) and marginally with increased Clark level (I/II vs III/IV/V, P = 0.070). Low (1-30%) p16(INK) (4A) expression was detected at the majority (19 of 54) of melanoma cases (35.19%), being marginally correlated with tumor lymphocytic infiltration (P = 0.078). SETDB1 nuclear immunoreactivity was observed in 47 of 57 (82.46%) cases, whereas 27 of 57 (47.37%) showed cytoplasmic immunoexpression. Cytoplasmic SETDB1 expression correlated with higher frequency of p16(INK) (4A) methylation and p16(INK) (4A) expression (P = 0.033, P = 0.011, respectively). Increased nuclear SETDB1 levels were associated with higher mitotic count (0-5/mm(2) vs >5/mm(2) , P = 0.0869), advanced Clark level (III-V, P = 0.0380), epidermal involvement (P = 0.0331) and the non-chronic sun exposure-associated melanoma type (P = 0.0664). Our data demonstrate for the first time the association of histone methyltransferase SETDB1 with frequent methylation of the euchromatic p16(INK) (4A) promoter and several prognostic parameters in melanomas.
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Affiliation(s)
- Maria Kostaki
- Department of Biological Chemistry, University of Athens Medical School, Athens, Greece
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6
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El-Habr EA, Levidou G, Trigka EA, Sakalidou J, Piperi C, Chatziandreou I, Spyropoulou A, Soldatos R, Tomara G, Petraki K, Samaras V, Zisakis A, Varsos V, Vrettakos G, Boviatsis E, Patsouris E, Saetta AA, Korkolopoulou P. Complex interactions between the components of the PI3K/AKT/mTOR pathway, and with components of MAPK, JAK/STAT and Notch-1 pathways, indicate their involvement in meningioma development. Virchows Arch 2014; 465:473-85. [PMID: 25146167 DOI: 10.1007/s00428-014-1641-3] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2014] [Revised: 08/02/2014] [Accepted: 08/07/2014] [Indexed: 01/10/2023]
Abstract
We investigated the significance of PI3K/AKT/mTOR pathway and its interactions with MAPK, JAK/STAT and Notch pathways in meningioma progression. Paraffin-embedded tissue from 108 meningioma patients was analysed for the presence of mutations in PIK3CA and AKT1. These were correlated with the expression status of components of the PI3K/AKT/mTOR pathway, including p85α and p110γ subunits of PI3K, phosphorylated (p)-AKT, p-mTOR, p-p70S6K and p-4E-BP1, as well as of p-ERK1/2, p-STAT3 and Notch-1, clinicopathological data and patient survival. A mutation in PIK3CA or AKT1 was found in around 9 % of the cases. Higher grade meningiomas displayed higher nuclear expression of p-p70S6K; higher nuclear and cytoplasmic expression of p-4E-BP1 and of Notch-1; lower cytoplasmic expression of p85αPI3K, p-p70S6K and p-ERK1/2; and lower PTEN Histo-scores (H-scores). PTEN H-score was inversely correlated with recurrence probability. In univariate survival analysis, nuclear expression of p-4E-BP1 and absence of p-ERK1/2 expression portended adverse prognosis, whereas in multivariate survival analysis, p-ERK1/2 expression emerged as an independent favourable prognostic factor. Treatment of the human meningioma cell line HBL-52 with the PI3K inhibitor LY294002 resulted in reduction of p-AKT, p-p70S6K and p-ERK1/2 protein levels. The complex interactions established between components of the PI3K/AKT/mTOR pathway, or with components of the MAPK, JAK/STAT and Notch-1 pathways, appear to be essential for facilitating and fuelling meningioma progression.
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Affiliation(s)
- Elias A El-Habr
- First Department of Pathology, Laikon General Hospital, Athens University Medical School, 115 27, Athens, Greece,
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7
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Moschonas DP, Piperi C, Korkolopoulou P, Levidou G, Kavantzas N, Trigka EA, Vlachos I, Arapostathi C, Perrea D, Mitropoulos D, Diamanti-Kandarakis E, Papavassiliou AG. Impact of diet-induced obesity in male mouse reproductive system: The role of advanced glycation end product-receptor for advanced glycation end product axis. Exp Biol Med (Maywood) 2014; 239:937-947. [PMID: 24872429 DOI: 10.1177/1535370214531899] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Obesity represents a route to broad physiological dysfunction affecting major organs including male urogenital system. Hyperglycemia, hyperlipidemia, and oxidative stress associated with obesity augment the formation of reactive metabolic by-products, namely advanced glycation end products (AGEs), leading to increased tissue deposition and damage. The exogenous intake and the endogenous accumulation of AGEs contribute to metabolic and reproductive abnormalities in both women and men. The present study assessed the effects of a diet high in saturated fatty acids (SAFA) on the lipid and metabolic profile (AGE levels, oxidative stress) as well as pathogenic (AGE, receptor for AGEs [RAGE] expression, apoptosis) and morphometric parameters of male reproductive system in vivo. Effects of switching to a diet rich in monounsaturated fatty acids (MUFA) or equal in the proportion MUFA to SAFA were further investigated. SAFA-fed animals were characterized by increased serum lipid concentrations (p < .05) compared to controls, but AGEs and peroxide levels were not significantly different across the different experimental groups. Elevated AGE deposition was detected for the first time in germ cells with a higher staining intensity in animals on the SAFA diet, compared to MUFA or MUFA-SAFA-fed animals or the control samples (p = .018). In Leydig cells, AGE localization was higher in the entire cohort of high-fat-fed animals compared to controls (p < .05). High-fat-fed mice displayed enhanced apoptosis compared to controls (p < .005). Furthermore, prostatic tissue demonstrated reduction in epithelial folding, an effect which was significantly reversed after MUFA diet administration. Our findings provide the basis for further investigation of AGE-RAGE axis in testicular and prostatic disturbances associated with diet-induced obesity. Simple dietetic intervention has beneficial effects on metabolic dysfunction of reproductive system before overt manifestations, indicating glycation as a promising therapeutic target.
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Affiliation(s)
- Dimitrios P Moschonas
- Department of Biological Chemistry, University of Athens Medical School, Athens 11527, Greece
| | - Christina Piperi
- Department of Biological Chemistry, University of Athens Medical School, Athens 11527, Greece
| | | | - Georgia Levidou
- 1 Department of Pathology, University of Athens Medical School, Athens 11527, Greece
| | - Nikolaos Kavantzas
- 1 Department of Pathology, University of Athens Medical School, Athens 11527, Greece
| | - Eleni-Andriana Trigka
- 1 Department of Pathology, University of Athens Medical School, Athens 11527, Greece
| | - Ioannis Vlachos
- Laboratory for Experimental Surgery and Surgical Research "N.S. Christeas," University of Athens Medical School, Athens 11527, Greece
| | - Christina Arapostathi
- Laboratory for Experimental Surgery and Surgical Research "N.S. Christeas," University of Athens Medical School, Athens 11527, Greece
| | - Despina Perrea
- Laboratory for Experimental Surgery and Surgical Research "N.S. Christeas," University of Athens Medical School, Athens 11527, Greece
| | | | - Evanthia Diamanti-Kandarakis
- Endocrine Unit, Third Department of Internal Medicine, University of Athens Medical School, Athens 11527, Greece
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Korkolopoulou P, Levidou G, Trigka EA, Prekete N, Karlou M, Thymara I, Sakellariou S, Fragkou P, Isaiadis D, Pavlopoulos P, Patsouris E, Saetta AA. A comprehensive immunohistochemical and molecular approach to the PI3K/AKT/mTOR (phosphoinositide 3-kinase/v-akt murine thymoma viral oncogene/mammalian target of rapamycin) pathway in bladder urothelial carcinoma. BJU Int 2012; 110:E1237-48. [PMID: 23107319 DOI: 10.1111/j.1464-410x.2012.11569.x] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
UNLABELLED What's known on the subject? and What does the study add? A few published studies investigating single or various PI3K/AKT/mTOR signalling components have produced inconsistent results. Moreover, PI3K regulatory subunit p85a and activated p70S6K expression levels have not been previously examined in urothelial carcinoma (UC). The present study addresses simultaneously all key members of PI3K/AKT/mTOR signalling cascade supporting a differential implication of PI3K/AKT/mTOR pathway components in urothelial tumorigenesis. Furthermore, we propose p-4E-BP1 as a potential prognostic marker in UC, which might assist the selection of patients more likely to benefit from chemotherapy regimens based on PI3K/AKT/mTOR pathway inhibition. Finally, the present study indicates PIK3CA/AKT1 mutational status as a potential predictive marker for time-to-recurrence. OBJECTIVE • To perform a comprehensive simultaneous assessment of all key members of phosphoinositide 3-kinase/v-akt murine thymoma viral oncogene/mammalian target of rapamycin (PI3K/AKT/mTOR) pathway along with AKT homolog 1 (AKT1) and PIK3 catalytic alpha polypeptide (PIK3CA) mutations in bladder urothelial carcinoma (UC). • Published information is limited to a few studies looking into single or various combinations of members of this pathway with inconsistent results. In particular the expression status of phosphorylated (p-)p70S6 kinase (p70S6K) and p85a subunit of PI3K has not been tested in UC. PATIENTS AND METHODS • Paraffin-embedded transurethral resection tissue from 113 patients with UC was investigated for the association of p85aPI3K, p-AKT, p-mTOR, p-p70S6K and p-4E-BP1 (eukaryotic initiation factor 4E-binding protein 1) expression status, as well as PIK3CA and AKT1 mutations with p-extracellular signal-regulated kinase 1/2 (ERK1/2), fibroblast growth factor receptor 3 (FGFR3), pathological features, recurrence and cancer-specific survival. RESULTS • With the exception of p-p70S6K, all others components of the PI3K/AKT/mTOR pathway were upregulated in UCs as compared with normal urothelium. • p-mTOR expression strongly correlated with its upstream p-AKT and marginally with its downstream p-p70S6K. p85aPI3K and p-ERK1/2 levels were also marginally correlated. • PIK3CA and AKT1 mutations were distinctly uncommon and mutually exclusive, without any association with pathological features. However, the presence of AKT1 mutations was associated with increased FGFR3 levels and was restricted to p85aPI3K immunonegative cases, whereas PIK3CA mutant cases had marginally lower p85aPI3K levels. • The presence of PIK3CA single or combined with AKT1 mutations was associated with shorter recurrence-free survival in univariate survival analysis. An inverse relationship was established between p-4E-BP1 immunopositivity and histological grade or T category, as well as between p-p70S6K levels and T category, the latter relationship being of marginal significance. • p-4E-BP1 nuclear expression was marginally associated with the presence of lymphovascular invasion and adversely affected survival in multivariate, but not in univariate analysis. CONCLUSIONS • PI3K/AKT/mTOR signalling components appear to be differentially implicated in urothelial tumorigenesis and, with the exception of p85aPI3K, are unrelated to the PIK3CA or AKT1 mutational status. • Our findings propose p-4E-BP1 as a potential prognostic marker in UC independent of its association with pathological features, which might assist the selection of patients more likely to benefit from PI3K/AKT/mTOR axis inhibition. • PIK3CA/AKT1 mutational status may have a place in the prediction of time-to-recurrence.
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Affiliation(s)
- Penelope Korkolopoulou
- First Department of Pathology, Laiko General Hospital, Athens, University School of Medicine, Athens, Greece
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Korkolopoulou P, Levidou G, El-Habr EA, Piperi C, Adamopoulos C, Samaras V, Boviatsis E, Thymara I, Trigka EA, Sakellariou S, Kavantzas N, Patsouris E, Saetta AA. Phosphorylated 4E-binding protein 1 (p-4E-BP1): a novel prognostic marker in human astrocytomas. Histopathology 2012; 61:293-305. [PMID: 22690797 DOI: 10.1111/j.1365-2559.2012.04236.x] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
AIMS To investigate the significance of the mammalian target of rapamycin (mTOR) pathway in astrocytic tumours, published information in this context being limited, especially regarding phosphorylated 4E-binding protein (p-4E-BP) 1. METHODS AND RESULTS Paraffin-embedded tissue from 111 patients with astroglial tumours (grades II-IV) was investigated for the association of phosphorylated mTOR (p-mTOR) signalling components with phosphorylated extracellular signal-related kinase 1/2 (p-ERK1/2) and phosphorylated AKT (p-AKT) expression, clinicopathological features, angiogenesis, isocitrate dehydrogenase 1 (IDH1)-R132H, and survival. Expression was also quantified by western blot analysis in 12 cases and in three primary glioma cell cultures following rapamycin treatment. p-mTOR expression correlated with p-4E-BP1 expression and marginally with p-p70S6K expression. p-4E-BP1 expression increased with tumour grade. Rapamycin induced a decline in phosphorylation levels of all three proteins. Nuclear p-AKT and cytoplasmic p-ERK1/2 immunoexpression correlated with p-4E-BP1 expression, whereas cytoplasmic p-AKT expression correlated with p-p70S6K expression. All three proteins were associated with increased angiogenesis but not with IDH1-R132H expression status. p-mTOR adversely affected overall and disease-free survival in univariate analysis. In multivariate survival analysis, the presence of p-4E-BP1 predicted shortened overall survival in the entire cohort and glioblastomas. CONCLUSIONS mTOR signalling components are differentially involved in the acquisition of a more aggressive and angiogenic phenotype in astrocytic tumours. Moreover, p-4E-BP1 emerges as a novel prognostic marker, which might aid in the selection of patients who are more likely to benefit from therapy with mTOR inhibitors.
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Affiliation(s)
- Penelope Korkolopoulou
- First Department of Pathology, Laiko Hospital, Medical School, National and Kapodistrian University of Athens, 11527, Athens, Greece
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Kanakis D, Levidou G, Gakiopoulou H, Eftichiadis C, Thymara I, Fragkou P, Trigka EA, Boviatsis E, Patsouris E, Korkolopoulou P. Replication protein A: a reliable biologic marker of prognostic and therapeutic value in human astrocytic tumors. Hum Pathol 2011; 42:1545-53. [DOI: 10.1016/j.humpath.2010.12.018] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/13/2010] [Revised: 12/17/2010] [Accepted: 12/22/2010] [Indexed: 11/25/2022]
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