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El-Kadi RA, AbdelKader NF, Zaki HF, Kamel AS. Vilazodone Alleviates Neurogenesis-Induced Anxiety in the Chronic Unpredictable Mild Stress Female Rat Model: Role of Wnt/β-Catenin Signaling. Mol Neurobiol 2024:10.1007/s12035-024-04142-3. [PMID: 38584231 DOI: 10.1007/s12035-024-04142-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Accepted: 03/19/2024] [Indexed: 04/09/2024]
Abstract
Defective β-catenin signaling is accompanied with compensatory neurogenesis process that may pave to anxiety. β-Catenin has a distinct role in alleviating anxiety in adolescence; however, it undergoes degradation by the degradation complex Axin and APC. Vilazodone (VZ) is a fast, effective antidepressant with SSRI activity and 5-HT1A partial agonism that amends somatic and/or psychic symptoms of anxiety. Yet, there is no data about anxiolytic effect of VZ on anxiety-related neurogenesis provoked by stress-reduced β-catenin signaling. Furthermore, females have specific susceptibility toward psychopathology. The aim of the present study is to uncover the molecular mechanism of VZ relative to Wnt/β-catenin signaling in female rats. Stress-induced anxiety was conducted by subjecting the rats to different stressful stimuli for 21 days. On the 15th day, stressed rats were treated with VZ(10 mg/kg, p.o.) alone or concomitant with the Wnt inhibitor: XAV939 (0.1 mg/kg, i.p.). Anxious rats showed low β-catenin level turned over by Axin-1 with unanticipated reduction of APC pursued with elevated protein levels of neurogenesis-stimulating proteins: c-Myc and pThr183-Erk likewise gene expressions of miR-17-5p and miR-18. Two weeks of VZ treatment showed anxiolytic effect figured by alleviation of hippocampal histological examination. VZ protected β-catenin signal via reduction in Axin-1 and elevation of APC conjugated with modulation of β-catenin downstream targets. The cytoplasmic β-catenin turnover by Axin-1 was restored by XAV939. Herein, VZ showed anti-anxiety effect, which may be in part through regaining the balance of the reduced β-catenin and its subsequent exaggerated response of p-Erk, c-Myc, Dicer-1, miR-17-5p, and miR-18.
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Affiliation(s)
- Rana A El-Kadi
- Pharmacology and Toxicology Department, Faculty of Pharmacy, Cairo University, Kasr El-Aini, Cairo, 11562, Egypt
- Alexandria University Hospitals, Champollion Street, El-Khartoum Square, El Azareeta, Alexandria, 21131, Egypt
| | - Noha F AbdelKader
- Pharmacology and Toxicology Department, Faculty of Pharmacy, Cairo University, Kasr El-Aini, Cairo, 11562, Egypt
| | - Hala F Zaki
- Pharmacology and Toxicology Department, Faculty of Pharmacy, Cairo University, Kasr El-Aini, Cairo, 11562, Egypt
| | - Ahmed S Kamel
- Pharmacology and Toxicology Department, Faculty of Pharmacy, Cairo University, Kasr El-Aini, Cairo, 11562, Egypt.
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2
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Brik A, Wichert K, Weber DG, Szafranski K, Rozynek P, Meier S, Ko YD, Büttner R, Gerwert K, Behrens T, Brüning T, Johnen G. Assessment of MYC and TERT copy number variations in lung cancer using digital PCR. BMC Res Notes 2023; 16:279. [PMID: 37858127 PMCID: PMC10585721 DOI: 10.1186/s13104-023-06566-x] [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: 04/21/2023] [Accepted: 10/11/2023] [Indexed: 10/21/2023] Open
Abstract
OBJECTIVE Lung cancer is the second most frequent cancer type and the most common cause of cancer-related deaths worldwide. Alteration of gene copy numbers are associated with lung cancer and the determination of copy number variations (CNV) is appropriate for the discrimination between tumor and non-tumor tissue in lung cancer. As telomerase reverse transcriptase (TERT) and v-myc avian myelocytomatosis viral oncogene homolog (MYC) play a role in lung cancer the aims of this study were the verification of our recent results analyzing MYC CNV in tumor and non-tumor tissue of lung cancer patients using an independent study group and the assessment of TERT CNV as an additional marker. RESULTS TERT and MYC status was analyzed using digital PCR (dPCR) in tumor and adjacent non-tumor tissue samples of 114 lung cancer patients. The difference between tumor and non-tumor samples were statistically significant (p < 0.0001) for TERT and MYC. Using a predefined specificity of 99% a sensitivity of 41% and 51% was observed for TERT and MYC, respectively. For the combination of TERT and MYC the overall sensitivity increased to 60% at 99% specificity. We demonstrated that a combination of markers increases the performance in comparison to individual markers. Additionally, the determination of CNV using dPCR might be an appropriate tool in precision medicine.
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Affiliation(s)
- Alexander Brik
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance - Institute of the Ruhr University Bochum (IPA), Bochum, Germany.
| | - Katharina Wichert
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance - Institute of the Ruhr University Bochum (IPA), Bochum, Germany
| | - Daniel G Weber
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance - Institute of the Ruhr University Bochum (IPA), Bochum, Germany
| | - Katja Szafranski
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance - Institute of the Ruhr University Bochum (IPA), Bochum, Germany
| | - Peter Rozynek
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance - Institute of the Ruhr University Bochum (IPA), Bochum, Germany
| | - Swetlana Meier
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance - Institute of the Ruhr University Bochum (IPA), Bochum, Germany
| | - Yon-Dschun Ko
- Department of Internal Medicine, Johanniter-Kliniken Bonn GmbH, Bonn, Germany
| | - Reinhard Büttner
- Institute of Pathology, Medical Faculty and Center for Molecular Medicine (CMMC), University of Cologne, Cologne, Germany
| | - Klaus Gerwert
- Center for Protein Diagnostics (PRODI), Department of Biophysics, Ruhr University Bochum, Bochum, Germany
| | - Thomas Behrens
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance - Institute of the Ruhr University Bochum (IPA), Bochum, Germany
| | - Thomas Brüning
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance - Institute of the Ruhr University Bochum (IPA), Bochum, Germany
| | - Georg Johnen
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance - Institute of the Ruhr University Bochum (IPA), Bochum, Germany
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Hughes C, Sreenilayam S, Brabazon D. Laser nanostructured gold biosensor for proto-oncogene detection. Sci Rep 2023; 13:17196. [PMID: 37821490 PMCID: PMC10567688 DOI: 10.1038/s41598-023-44372-4] [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: 07/06/2023] [Accepted: 10/07/2023] [Indexed: 10/13/2023] Open
Abstract
The advancement of biosensor research has been a primary driving force in the continuing progress of modern medical science. While traditional nanofabrication methods have long been the foundation of biosensor research, recent years have seen a shift in the field of nanofabrication towards laser-based techniques. Here we report a gold-based biosensor, with a limit of detection (LoD) 3.18 µM, developed using environmentally friendly Laser Ablation Synthesis in Liquid (LASiS) and Confined Atmospheric Pulsed-laser (CAP) deposition techniques for the first time. The sensors were able detect a DNA fragment corresponding to the longest unpaired sequence of the c-Myc gene, indicating their potential for detecting such fragments in the ctDNA signature of various cancers. The LoD of the developed novel biosensor highlights its reliability and sensitivity as an analytical platform. The reproducibility of the sensor was examined via the production and testing of 200 sensors with the same fabrication methodology. This work offers a scalable, and green approach to fabricating viable biosensors capable of detecting clinically relevant oncogenic targets.
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Affiliation(s)
- Cian Hughes
- I-Form, Advanced Manufacturing Research Centre, Advanced Processing Technology Research Centre, School of Mechanical and Manufacturing Engineering, Dublin City University, Glasnevin, Dublin-9, Ireland
| | - Sithara Sreenilayam
- I-Form, Advanced Manufacturing Research Centre, Advanced Processing Technology Research Centre, School of Mechanical and Manufacturing Engineering, Dublin City University, Glasnevin, Dublin-9, Ireland
| | - Dermot Brabazon
- I-Form, Advanced Manufacturing Research Centre, Advanced Processing Technology Research Centre, School of Mechanical and Manufacturing Engineering, Dublin City University, Glasnevin, Dublin-9, Ireland.
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4
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Gaggianesi M, Mangiapane LR, Modica C, Pantina VD, Porcelli G, Di Franco S, Lo Iacono M, D’Accardo C, Verona F, Pillitteri I, Turdo A, Veschi V, Brancato OR, Muratore G, Pistone G, Bongiorno MR, Todaro M, De Maria R, Stassi G. Dual Inhibition of Myc Transcription and PI3K Activity Effectively Targets Colorectal Cancer Stem Cells. Cancers (Basel) 2022; 14:cancers14030673. [PMID: 35158939 PMCID: PMC8833549 DOI: 10.3390/cancers14030673] [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: 11/05/2021] [Revised: 12/16/2021] [Accepted: 01/25/2022] [Indexed: 12/04/2022] Open
Abstract
Simple Summary Compelling evidence has shown that cancer stem cells (CSCs) are responsible for high resistance to conventional anti-cancer therapies. Here, we demonstrate that the tumor microenvironment protects CR-CSCs from EGFR/HER2, BRAF and PI3K targeting, promoting CD44v6 and Myc expression. Alternatively, as a substitution for HER2 and BRAF, the Myc transcription inhibitor can overcome the protective effects of microenvironmental cytokines, impairing the survival of CR-CSCs. These data highlight the targeting of Myc and PI3K activity as a novel therapeutic strategy against advanced colorectal cancer. Abstract Despite advances in the curative approach, the survival rate of advanced colorectal cancer (CRC) patients is still poor, which is likely due to the emergence of cancer cell clones resistant to the available therapeutic options. We have already shown that CD44v6-positive CRC stem cells (CR-CSCs) are refractory toward standard anti-tumor therapeutic agents due to the activation of the PI3K pathway together with high HER2 expression levels. Tumor microenvironmental cytokines confer resistance to CR-CSCs against HER2/PI3K targeting by enhancing activation of the MAPK pathway. Here, we show that the CSC compartment, spared by BRAF inhibitor-based targeted therapy, is associated with increased expression levels of CD44v6 and Myc and retains boosted clonogenic activity along with residual tumorigenic potential. Inhibition of Myc transcription, downstream of the MAPK cascade components, and PI3K pathway activity was able to overcome the protective effects of microenvironmental cytokines, affecting the survival and the clonogenic activity of CR-CSCs, regardless of their mutational background. Likewise, the double targeting induced stabilization of mouse tumor avatars. Altogether, these data outline the rationale for dual kinase targeting of CR-CSCs to prevent their adaptive response, which would lead to disease progression.
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Affiliation(s)
- Miriam Gaggianesi
- Department of Surgical, Oncological and Stomatological Sciences (DICHIRONS), University of Palermo, 90127 Palermo, Italy; (M.G.); (C.M.); (V.D.P.); (S.D.F.); (M.L.I.); (I.P.); (V.V.); (O.R.B.); (G.M.)
| | - Laura Rosa Mangiapane
- Department of Health Promotion Sciences, Internal Medicine and Medical Specialties (PROMISE), University of Palermo, 90127 Palermo, Italy; (L.R.M.); (G.P.); (C.D.); (F.V.); (A.T.); (G.P.); (M.R.B.); (M.T.)
| | - Chiara Modica
- Department of Surgical, Oncological and Stomatological Sciences (DICHIRONS), University of Palermo, 90127 Palermo, Italy; (M.G.); (C.M.); (V.D.P.); (S.D.F.); (M.L.I.); (I.P.); (V.V.); (O.R.B.); (G.M.)
| | - Vincenzo Davide Pantina
- Department of Surgical, Oncological and Stomatological Sciences (DICHIRONS), University of Palermo, 90127 Palermo, Italy; (M.G.); (C.M.); (V.D.P.); (S.D.F.); (M.L.I.); (I.P.); (V.V.); (O.R.B.); (G.M.)
| | - Gaetana Porcelli
- Department of Health Promotion Sciences, Internal Medicine and Medical Specialties (PROMISE), University of Palermo, 90127 Palermo, Italy; (L.R.M.); (G.P.); (C.D.); (F.V.); (A.T.); (G.P.); (M.R.B.); (M.T.)
| | - Simone Di Franco
- Department of Surgical, Oncological and Stomatological Sciences (DICHIRONS), University of Palermo, 90127 Palermo, Italy; (M.G.); (C.M.); (V.D.P.); (S.D.F.); (M.L.I.); (I.P.); (V.V.); (O.R.B.); (G.M.)
| | - Melania Lo Iacono
- Department of Surgical, Oncological and Stomatological Sciences (DICHIRONS), University of Palermo, 90127 Palermo, Italy; (M.G.); (C.M.); (V.D.P.); (S.D.F.); (M.L.I.); (I.P.); (V.V.); (O.R.B.); (G.M.)
| | - Caterina D’Accardo
- Department of Health Promotion Sciences, Internal Medicine and Medical Specialties (PROMISE), University of Palermo, 90127 Palermo, Italy; (L.R.M.); (G.P.); (C.D.); (F.V.); (A.T.); (G.P.); (M.R.B.); (M.T.)
| | - Francesco Verona
- Department of Health Promotion Sciences, Internal Medicine and Medical Specialties (PROMISE), University of Palermo, 90127 Palermo, Italy; (L.R.M.); (G.P.); (C.D.); (F.V.); (A.T.); (G.P.); (M.R.B.); (M.T.)
| | - Irene Pillitteri
- Department of Surgical, Oncological and Stomatological Sciences (DICHIRONS), University of Palermo, 90127 Palermo, Italy; (M.G.); (C.M.); (V.D.P.); (S.D.F.); (M.L.I.); (I.P.); (V.V.); (O.R.B.); (G.M.)
| | - Alice Turdo
- Department of Health Promotion Sciences, Internal Medicine and Medical Specialties (PROMISE), University of Palermo, 90127 Palermo, Italy; (L.R.M.); (G.P.); (C.D.); (F.V.); (A.T.); (G.P.); (M.R.B.); (M.T.)
| | - Veronica Veschi
- Department of Surgical, Oncological and Stomatological Sciences (DICHIRONS), University of Palermo, 90127 Palermo, Italy; (M.G.); (C.M.); (V.D.P.); (S.D.F.); (M.L.I.); (I.P.); (V.V.); (O.R.B.); (G.M.)
| | - Ornella Roberta Brancato
- Department of Surgical, Oncological and Stomatological Sciences (DICHIRONS), University of Palermo, 90127 Palermo, Italy; (M.G.); (C.M.); (V.D.P.); (S.D.F.); (M.L.I.); (I.P.); (V.V.); (O.R.B.); (G.M.)
| | - Giampaolo Muratore
- Department of Surgical, Oncological and Stomatological Sciences (DICHIRONS), University of Palermo, 90127 Palermo, Italy; (M.G.); (C.M.); (V.D.P.); (S.D.F.); (M.L.I.); (I.P.); (V.V.); (O.R.B.); (G.M.)
| | - Giuseppe Pistone
- Department of Health Promotion Sciences, Internal Medicine and Medical Specialties (PROMISE), University of Palermo, 90127 Palermo, Italy; (L.R.M.); (G.P.); (C.D.); (F.V.); (A.T.); (G.P.); (M.R.B.); (M.T.)
| | - Maria Rita Bongiorno
- Department of Health Promotion Sciences, Internal Medicine and Medical Specialties (PROMISE), University of Palermo, 90127 Palermo, Italy; (L.R.M.); (G.P.); (C.D.); (F.V.); (A.T.); (G.P.); (M.R.B.); (M.T.)
| | - Matilde Todaro
- Department of Health Promotion Sciences, Internal Medicine and Medical Specialties (PROMISE), University of Palermo, 90127 Palermo, Italy; (L.R.M.); (G.P.); (C.D.); (F.V.); (A.T.); (G.P.); (M.R.B.); (M.T.)
| | - Ruggero De Maria
- Dipartimento di Medicina e Chirurgia Traslazionale, Facoltà di Medicina e Chirurgia, Università Cattolica del Sacro Cuore, 00168 Roma, Italy
- Fondazione Policlinico A Gemelli IRCCS, 00168 Roma, Italy
- Correspondence: (R.D.M.); (G.S.); Tel.: +39-06-3015-4914 (R.D.M.); +39-091-2389-0813 (G.S.)
| | - Giorgio Stassi
- Department of Surgical, Oncological and Stomatological Sciences (DICHIRONS), University of Palermo, 90127 Palermo, Italy; (M.G.); (C.M.); (V.D.P.); (S.D.F.); (M.L.I.); (I.P.); (V.V.); (O.R.B.); (G.M.)
- Correspondence: (R.D.M.); (G.S.); Tel.: +39-06-3015-4914 (R.D.M.); +39-091-2389-0813 (G.S.)
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Czeczko LEA, Ribas CAPM, Czeczko NG, Skare TL, Yamakawa CK, Gionedis G, Vasconcelos C, Bremer FP, Castoldi DF, Gasser M, Waaga-Gasser AM. ARE STEM CELL MARKER EXPRESSION AND CD133 ANALYSIS RELEVANT TO DIFFERENTIATE COLORECTAL CANCER? ABCD-ARQUIVOS BRASILEIROS DE CIRURGIA DIGESTIVA 2021; 34:e1585. [PMID: 34669880 PMCID: PMC8521790 DOI: 10.1590/0102-672020210002e1585] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Accepted: 02/02/2021] [Indexed: 11/30/2022]
Abstract
Background:
CD133 and AXL have been described as cancer stem cell markers, and c-MYC as a key regulatory cellular mechanism in colorectal cancer (CRC). Aim: Evaluate the prognostic role of the biomarkers CD133, AXL and c-MYC and their association with clinicopathologic characteristics in colorectal adenocarcinomas and adenomas. Methods:
A total of 156 patients with UICC stage I-IV adenocarcinomas (n=122) and adenomas (n=34) were analyzed. Tissue microarrays (TMA) from primary tumors and polyps for CD133, c-MYC and AXL expression were performed and analyzed for their significance with clinicopathologic characteristics. Results:
Poorly differentiated adenocarcinomas and disease progression were independent risk factors for poor overall survival. The median overall survival time was 30 months. Positive CD133 expression (35.9% of all cases), particularly of right-sided CRCs (44.8% of the CD133+ cases), was negatively correlated with death in the univariate analysis, which did not reach significance in the multivariate analysis. c-MYC (15.4% of all cases) was predominantly expressed in advanced-stage patients with distant (non-pulmonary/non-hepatic) metastasis. AXL expression was found only occasionally, and predominantly dominated in adenomas, with less penetrance in high-grade dysplasia. Conclusions:
CD133 expression was not associated with inferior overall survival in CRC. While AXL showed inconclusive results, c-MYC expression in primary CRCs was associated with distant metastasis.
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Affiliation(s)
| | | | - Nicolau Gregori Czeczko
- Mackenzie Evangelical Faculty of Paraná, Curitiba, PR, Brazil.,University Evangelical Mackenzie Hospital, Curitiba, PR, Brazil
| | | | | | | | | | - Fabiola Pabst Bremer
- Mackenzie Evangelical Faculty of Paraná, Curitiba, PR, Brazil.,University Evangelical Mackenzie Hospital, Curitiba, PR, Brazil
| | - Diogo Francesco Castoldi
- Mackenzie Evangelical Faculty of Paraná, Curitiba, PR, Brazil.,University Evangelical Mackenzie Hospital, Curitiba, PR, Brazil
| | - Martin Gasser
- Mackenzie Evangelical Faculty of Paraná, Curitiba, PR, Brazil
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Bohers E, Viailly PJ, Jardin F. cfDNA Sequencing: Technological Approaches and Bioinformatic Issues. Pharmaceuticals (Basel) 2021; 14:ph14060596. [PMID: 34205827 PMCID: PMC8234829 DOI: 10.3390/ph14060596] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Revised: 06/18/2021] [Accepted: 06/18/2021] [Indexed: 12/14/2022] Open
Abstract
In the era of precision medicine, it is crucial to identify molecular alterations that will guide the therapeutic management of patients. In this context, circulating tumoral DNA (ctDNA) released by the tumor in body fluids, like blood, and carrying its molecular characteristics is becoming a powerful biomarker for non-invasive detection and monitoring of cancer. Major recent technological advances, especially in terms of sequencing, have made possible its analysis, the challenge still being its reliable early detection. Different parameters, from the pre-analytical phase to the choice of sequencing technology and bioinformatic tools can influence the sensitivity of ctDNA detection.
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7
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Czeczko LEA, Ribas CAPM, Czeczko NG, Skare TL, Yamakawa CK, Gionedis G, Vasconcelos C, Bremer FP, Castoldi DF, Gasser M, Waaga-Gasser AM. ARE STEM CELL MARKER EXPRESSION AND CD133 ANALYSIS RELEVANT TO DIFFERENTIATE COLORECTAL CANCER? ACTA ACUST UNITED AC 2021; 33:e1568. [PMID: 33759958 PMCID: PMC7983529 DOI: 10.1590/0102-672020200004e1568] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Accepted: 10/10/2020] [Indexed: 11/22/2022]
Abstract
Background:
CD133 and AXL have been described as cancer stem cell markers, and c-MYC as a key regulatory cellular mechanism in colorectal cancer (CRC).
Aim: Evaluate the prognostic role of the biomarkers CD133, AXL and c-MYC and their association with clinicopathologic characteristics in colorectal adenocarcinomas and adenomas.
Methods:
A total of 156 patients with UICC stage I-IV adenocarcinomas (n=122) and adenomas (n=34) were analyzed. Tissue microarrays (TMA) from primary tumors and polyps for CD133, c-MYC and AXL expression were performed and analyzed for their significance with clinicopathologic characteristics.
Results:
Poorly differentiated adenocarcinomas and disease progression were independent risk factors for poor overall survival. The median overall survival time was 30 months. Positive CD133 expression (35.9% of all cases), particularly of right-sided CRCs (44.8% of the CD133+ cases), was negatively correlated with death in the univariate analysis, which did not reach significance in the multivariate analysis. c-MYC (15.4% of all cases) was predominantly expressed in advanced-stage patients with distant (non-pulmonary/non-hepatic) metastasis. AXL expression was found only occasionally, and predominantly dominated in adenomas, with less penetrance in high-grade dysplasia.
Conclusions:
CD133 expression was not associated with inferior overall survival in CRC. While AXL showed inconclusive results, c-MYC expression in primary CRCs was associated with distant metastasis.
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Affiliation(s)
| | | | - Nicolau Gregori Czeczko
- Mackenzie Evangelical Faculty of Paraná, Curitiba, PR, Brazil.,University Evangelical Mackenzie Hospital, Curitiba, PR, Brazil
| | | | | | | | | | - Fabiola Pabst Bremer
- Mackenzie Evangelical Faculty of Paraná, Curitiba, PR, Brazil.,University Evangelical Mackenzie Hospital, Curitiba, PR, Brazil
| | - Diogo Francesco Castoldi
- Mackenzie Evangelical Faculty of Paraná, Curitiba, PR, Brazil.,University Evangelical Mackenzie Hospital, Curitiba, PR, Brazil
| | - Martin Gasser
- Mackenzie Evangelical Faculty of Paraná, Curitiba, PR, Brazil
| | - Ana Maria Waaga-Gasser
- Renal Division, Brigham and Woman's Hospital, Harvard Medical School, Boston, MA, USA.,Mackenzie Evangelical Faculty of Paraná, Curitiba, PR, Brazil
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8
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Digital PCR for the Analysis of MYC Copy Number Variation in Lung Cancer. DISEASE MARKERS 2020; 2020:4176376. [PMID: 33014186 PMCID: PMC7525309 DOI: 10.1155/2020/4176376] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Revised: 06/29/2020] [Accepted: 09/06/2020] [Indexed: 12/24/2022]
Abstract
Background MYC (v-myc avian myelocytomatosis viral oncogene homolog) is one of the most frequently amplified genes in lung tumors. For the analysis of gene copy number variations, dPCR (digital PCR) is an appropriate tool. The aim of our study was the assessment of dPCR for the detection of MYC copy number variations (CNV) in lung tissue considering clinicopathological parameters. Material and Methods. MYC status was analyzed with dPCR as well as qPCR (quantitative PCR) using gDNA (genomic DNA) from tumor and adjacent nontumor tissue samples of lung cancer patients. The performance of MYC was estimated based on the AUC (area under curve). Results The results of the MYC amplification correlated significantly between dPCR and qPCR (r S = 0.81, P < 0.0001). The MYC copy number revealed by dPCR showed statistically significant differences between tumor and adjacent nontumor tissues. For discrimination, a sensitivity of 43% and a specificity of 99% were calculated, representing 55 true-positive and one false-positive tests. No statistically significant differences could be observed for age, sex, and smoking status or the clinicopathological parameters (histological subtype, grade, and stage). Conclusion The results of the study show that dPCR is an accurate and reliable method for the determination of MYC copy numbers. The application is characterized by high specificity and moderate sensitivity. MYC amplification is a common event in lung cancer patients, and it is indicated that the determination of the MYC status might be useful in clinical diagnostics.
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Kim B, Nam SK, Seo SH, Park KU, Ahn SH, Park DJ, Kim HH, Kim WH, Lee HS. Comparative analysis of HER2 copy number between plasma and tissue samples in gastric cancer using droplet digital PCR. Sci Rep 2020; 10:4177. [PMID: 32144300 PMCID: PMC7060190 DOI: 10.1038/s41598-020-60897-4] [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: 10/08/2019] [Accepted: 02/17/2020] [Indexed: 01/18/2023] Open
Abstract
In this study, we measured the human epidermal growth factor receptor 2 (HER2) copy number in both tissue and plasma samples of gastric cancer patients by using droplet digital polymerase chain reaction (ddPCR) method. Eighty gastric cancer patients were enrolled and both formalin-fixed and paraffin-embedded tissue and preoperative plasma samples were collected. HER2 status was determined by HER2 immunohistochemistry (IHC)/silver in situ hybridization (SISH) in tissue samples and ddPCR of the target gene HER2 and the reference gene eukaryotic translation initiation factor 2C, 1 in both tissue and plasma. The concordance rate of tissue HER2 status determined by IHC/SISH and HER2 ddPCR was 90.0% (72/80), and the sensitivity and specificity of tissue ddPCR were 85.0% and 95.0%, respectively. The concordance rate of plasma ddPCR and IHC/SISH was 63.8% (51/80). The sensitivity, specificity, positive predictive value, and negative predictive value of plasma HER2 ddPCR were 37.5%, 90.0%, 79.0%, and 59.0%, respectively. As HER2 measurement by tissue ddPCR showed a high concordance rate with HER2 status by IHC/SISH, it could replace tissue IHC/SISH testing in gastric cancer. These findings may contribute to the development of tissue and plasma HER2 testing that would be useful in daily practice.
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Affiliation(s)
- Boram Kim
- Department of Laboratory Medicine, Seoul National University College of Medicine, Seoul, 03080, Republic of Korea.,Department of Laboratory Medicine, Seoul National University Hospital, Seoul, 03080, Republic of Korea
| | - Soo Kyung Nam
- Department of Pathology, Seoul National University Bundang Hospital, Seongnam, 13620, Republic of Korea
| | - Soo Hyun Seo
- Department of Laboratory Medicine, Seoul National University College of Medicine, Seoul, 03080, Republic of Korea.,Department of Laboratory Medicine, Seoul National University Bundang Hospital, Seongnam, 13620, Republic of Korea
| | - Kyoung Un Park
- Department of Laboratory Medicine, Seoul National University College of Medicine, Seoul, 03080, Republic of Korea.,Department of Laboratory Medicine, Seoul National University Bundang Hospital, Seongnam, 13620, Republic of Korea
| | - Sang-Hoon Ahn
- Department of Surgery, Seoul National University College of Medicine, Seoul, 03080, Republic of Korea.,Department of Surgery, Seoul National University Bundang Hospital, Seongnam, 13620, Republic of Korea
| | - Do Joong Park
- Department of Surgery, Seoul National University College of Medicine, Seoul, 03080, Republic of Korea
| | - Hyung-Ho Kim
- Department of Surgery, Seoul National University College of Medicine, Seoul, 03080, Republic of Korea.,Department of Surgery, Seoul National University Bundang Hospital, Seongnam, 13620, Republic of Korea
| | - Woo Ho Kim
- Department of Pathology, Seoul National University College of Medicine, Seoul, 03080, Republic of Korea
| | - Hye Seung Lee
- Department of Pathology, Seoul National University Bundang Hospital, Seongnam, 13620, Republic of Korea. .,Department of Pathology, Seoul National University College of Medicine, Seoul, 03080, Republic of Korea.
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