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Cavagna RDO, Pinto IA, Escremim de Paula F, Berardinelli GN, Sant'Anna D, Santana I, da Silva VD, Da Silva ECA, Miziara JE, Mourão Dias J, Antoniazzi A, Jacinto A, De Marchi P, Molina-Vila MA, Ferro Leal L, Reis RM. Disruptive and Truncating TP53 Mutations Are Associated with African-Ancestry and Worse Prognosis in Brazilian Patients with Lung Adenocarcinoma. Pathobiology 2023; 90:344-355. [PMID: 37031678 DOI: 10.1159/000530587] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [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] [Received: 10/27/2022] [Accepted: 04/03/2023] [Indexed: 04/11/2023] Open
Abstract
INTRODUCTION TP53 is the most frequently mutated gene in lung tumors, but its prognostic role in admixed populations, such as Brazilians, remains unclear. In this study, we aimed to evaluate the frequency and clinicopathological impact of TP53 mutations in non-small cell lung cancer (NSCLC) patients in Brazil. METHODS We analyzed 446 NSCLC patients from Barretos Cancer Hospital. TP53 mutational status was evaluated through targeted next-generation sequencing (NGS) and the variants were biologically classified as disruptive/nondisruptive and as truncating/nontruncating. We also assessed genetic ancestry using 46 ancestry-informative markers. Analysis of lung adenocarcinomas from the cBioportal dataset was performed. We further examined associations of TP53 mutations with patients' clinicopathological features. RESULTS TP53 mutations were detected in 64.3% (n = 287/446) of NSCLC cases, with a prevalence of 60.4% (n = 221/366) in lung adenocarcinomas. TP53 mutations were associated with brain metastasis at diagnosis, tobacco consumption, and higher African ancestry. Disruptive and truncating mutations were associated with a younger age at diagnosis. Additionally, cBioportal dataset revealed that TP53 mutations were associated with younger age and Black skin color. Patients harboring disruptive/truncating TP53 mutations had worse overall survival than nondisruptive/nontruncating and wild-type patients. CONCLUSION TP53 mutations are common in Brazilian lung adenocarcinomas, and their biological characterization as disruptive and truncating mutations is associated with African ancestry and shorter overall survival.
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Affiliation(s)
| | - Icaro Alves Pinto
- Molecular Oncology Research Center, Barretos Cancer Hospital, São Paulo, Brazil
| | | | | | - Débora Sant'Anna
- Molecular Oncology Research Center, Barretos Cancer Hospital, São Paulo, Brazil
| | - Iara Santana
- Department of Pathology, Barretos Cancer Hospital, São Paulo, Brazil
| | | | | | - José Elias Miziara
- Department Thoracic Surgery, Barretos Cancer Hospital, São Paulo, Brazil
- Department of Medical Oncology, Barretos Cancer Hospital, São Paulo, Brazil
| | | | - Augusto Antoniazzi
- Department of Medical Oncology, Barretos Cancer Hospital, São Paulo, Brazil
- Department of Oncogenetics / Barretos Cancer Hospital, São Paulo, Brazil
| | - Alexandre Jacinto
- Department of Radiotherapy, Barretos Cancer Hospital, São Paulo, Brazil
| | - Pedro De Marchi
- Molecular Oncology Research Center, Barretos Cancer Hospital, São Paulo, Brazil
- Department of Medical Oncology, Barretos Cancer Hospital, São Paulo, Brazil
- Department of Medical Oncology, Oncoclinicas, Rio de Janeiro, Brazil
| | | | - Leticia Ferro Leal
- Molecular Oncology Research Center, Barretos Cancer Hospital, São Paulo, Brazil
- Barretos School of Health Sciences Dr. Paulo Prata, FACISB, São Paulo, Brazil
| | - Rui Manuel Reis
- Molecular Oncology Research Center, Barretos Cancer Hospital, São Paulo, Brazil
- Molecular Diagnostic Laboratory, Barretos Cancer Hospital, São Paulo, Brazil
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal
- ICVS/3B's - PT Government Associate Laboratory, Braga-Guimarães, Portugal
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Stefan L, Trantea N, Roberts A, Strikwerda S, Antoniazzi A, Zaharia D. Cernavoda Tritium Removal Facility—Evolution in TRF Design. Fusion Science and Technology 2017. [DOI: 10.1080/15361055.2017.1288413] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- L. Stefan
- ICSI, Ramnicu-Valcea, ICSI Rm. Valcea, 240050 Uzinei Str. No 4, Rm. Valcea, Valcea, Romania
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De Ninno G, Antoniazzi A, Diviacco B, Fanelli D, Giannessi L, Meucci R, Trovó M. Dynamics and stabilization of the Elettra storage-ring free-electron laser. Phys Rev E Stat Nonlin Soft Matter Phys 2005; 71:066504. [PMID: 16089888 DOI: 10.1103/physreve.71.066504] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2004] [Indexed: 05/03/2023]
Abstract
The ultimate performance of a storage-ring free-electron laser in terms of light stability and extracted power depends on the possibility of simultaneously controlling the electron-beam and laser dynamics. As a preliminary requirement, the level of longitudinal and transverse electron-beam stability must be high enough to guarantee the laser start-up and growth. This is usually obtained by means of dedicated feedback systems. Once such a requirement is satisfied, the possibility of establishing and maintaining a continuous-wave operation mode finally resides in a deep understanding of the strongly coupled laser-electrons dynamics. For this purpose, we have developed a simple theoretical model which has been proved to be able to provide insight into the evolution of the laser intensity. In this framework, we have also proposed the possibility of utilizing a derivative closed-loop feedback to create or enlarge the region of stable signal. A feedback of this type has been implemented on the Elettra storage-ring free-electron laser. The obtained results, which fully confirm our predictions, are discussed in this paper.
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Affiliation(s)
- G De Ninno
- Sincrotrone Trieste, 34012 Trieste, Italy
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