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Zelli V, Parisi A, Patruno L, Cannita K, Ficorella C, Luzi C, Compagnoni C, Zazzeroni F, Alesse E, Tessitore A. Concurrent RAS and RAS/BRAF V600E Variants in Colorectal Cancer: More Frequent Than Expected? A Case Report. Front Oncol 2022; 12:863639. [PMID: 35463316 PMCID: PMC9022079 DOI: 10.3389/fonc.2022.863639] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Accepted: 03/02/2022] [Indexed: 12/24/2022] Open
Abstract
The assessment of RAS and BRAF mutational status is one of the main steps in the diagnostic and therapeutic algorithm of metastatic colorectal cancer (mCRC). Multiple mutations in the BRAF and RAS pathway are described as a rare event, with concurrent variants in KRAS and BRAF genes observed in approximately 0.05% of mCRC cases. Here, we report data from a case series affected by high-risk stage III and stage IV CRC and tested for RAS and BRAF mutation, treated at our Medical Oncology Unit. The analysis of KRAS, NRAS (codons 12, 13, 59, 61, 117, 146), and BRAF (codon 600) hotspot variants was performed in 161 CRC tumors from August 2018 to September 2021 and revealed three (1.8%) patients showing mutations in both KRAS and BRAF (V600E), including two cases with earlier CRC and one with metastatic disease. We also identified one patient (0.6%) with a mutation in both KRAS and NRAS genes and another one (0.6%) with a double KRAS mutation. Notably, the latter was characterized by aggressive behavior and poor clinical outcome. The mutational status, pathological features, and clinical history of these five CRC cases are described. Overall, this study case series adds evidence to the limited available literature concerning both the epidemiological and clinical aspects of CRC cases characterized by the presence of concurrent RAS/BRAF variants. Future multicentric studies will be required to increase the sample size and provide additional value to results observed so far in order to improve clinical management of this subgroup of CRC patients.
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Affiliation(s)
- Veronica Zelli
- Department of Biotechnological and Applied Clinical Sciences, University of L'Aquila, L'Aquila, Italy.,Center for Molecular Diagnostics and Advanced Therapies, University of L'Aquila, L'Aquila, Italy
| | - Alessandro Parisi
- Department of Life, Health and Environmental Sciences, University of L'Aquila, L'Aquila, Italy.,Medical Oncology Unit, St. Salvatore Hospital, L'Aquila, Italy
| | - Leonardo Patruno
- Department of Biotechnological and Applied Clinical Sciences, University of L'Aquila, L'Aquila, Italy.,Medical Oncology Unit, St. Salvatore Hospital, L'Aquila, Italy
| | - Katia Cannita
- Medical Oncology Unit, "Giuseppe Mazzini" Hospital, Teramo, Italy
| | - Corrado Ficorella
- Department of Biotechnological and Applied Clinical Sciences, University of L'Aquila, L'Aquila, Italy.,Medical Oncology Unit, St. Salvatore Hospital, L'Aquila, Italy
| | - Carla Luzi
- Department of Biotechnological and Applied Clinical Sciences, University of L'Aquila, L'Aquila, Italy.,Center for Molecular Diagnostics and Advanced Therapies, University of L'Aquila, L'Aquila, Italy
| | - Chiara Compagnoni
- Department of Biotechnological and Applied Clinical Sciences, University of L'Aquila, L'Aquila, Italy
| | - Francesca Zazzeroni
- Department of Biotechnological and Applied Clinical Sciences, University of L'Aquila, L'Aquila, Italy
| | - Edoardo Alesse
- Department of Biotechnological and Applied Clinical Sciences, University of L'Aquila, L'Aquila, Italy
| | - Alessandra Tessitore
- Department of Biotechnological and Applied Clinical Sciences, University of L'Aquila, L'Aquila, Italy.,Center for Molecular Diagnostics and Advanced Therapies, University of L'Aquila, L'Aquila, Italy
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2
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Zelli V, Compagnoni C, Cannita K, Capelli R, Capalbo C, Di Vito Nolfi M, Alesse E, Zazzeroni F, Tessitore A. Applications of Next Generation Sequencing to the Analysis of Familial Breast/Ovarian Cancer. High Throughput 2020; 9:ht9010001. [PMID: 31936873 PMCID: PMC7151204 DOI: 10.3390/ht9010001] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Revised: 01/02/2020] [Accepted: 01/07/2020] [Indexed: 12/24/2022] Open
Abstract
Next generation sequencing (NGS) provides a powerful tool in the field of medical genetics, allowing one to perform multi-gene analysis and to sequence entire exomes (WES), transcriptomes or genomes (WGS). The generated high-throughput data are particularly suitable for enhancing the understanding of the genetic bases of complex, multi-gene diseases, such as cancer. Among the various types of tumors, those with a familial predisposition are of great interest for the isolation of novel genes or gene variants, detectable at the germline level and involved in cancer pathogenesis. The identification of novel genetic factors would have great translational value, helping clinicians in defining risk and prevention strategies. In this regard, it is known that the majority of breast/ovarian cases with familial predisposition, lacking variants in the highly penetrant BRCA1 and BRCA2 genes (non-BRCA), remains unexplained, although several less penetrant genes (e.g., ATM, PALB2) have been identified. In this scenario, NGS technologies offer a powerful tool for the discovery of novel factors involved in familial breast/ovarian cancer. In this review, we summarize and discuss the state of the art applications of NGS gene panels, WES and WGS in the context of familial breast/ovarian cancer.
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Affiliation(s)
- Veronica Zelli
- Department of Biotechnological and Applied Clinical Sciences, University of L’Aquila, Via Vetoio, Coppito 2, 67100 L’Aquila, Italy; (V.Z.); (C.C.); (R.C.); (M.D.V.N.); (E.A.); (F.Z.)
- Center for Molecular Diagnostics and Advanced Therapies, University of L’Aquila, Via Petrini, 67100 L’Aquila, Italy
| | - Chiara Compagnoni
- Department of Biotechnological and Applied Clinical Sciences, University of L’Aquila, Via Vetoio, Coppito 2, 67100 L’Aquila, Italy; (V.Z.); (C.C.); (R.C.); (M.D.V.N.); (E.A.); (F.Z.)
| | - Katia Cannita
- Medical Oncology Unit, St Salvatore Hospital, Via L. Natali 1, 67100 L’Aquila, Italy;
| | - Roberta Capelli
- Department of Biotechnological and Applied Clinical Sciences, University of L’Aquila, Via Vetoio, Coppito 2, 67100 L’Aquila, Italy; (V.Z.); (C.C.); (R.C.); (M.D.V.N.); (E.A.); (F.Z.)
| | - Carlo Capalbo
- Department of Molecular Medicine, University of Rome “La Sapienza”, Viale Regina Elena 324, 00161 Rome, Italy;
| | - Mauro Di Vito Nolfi
- Department of Biotechnological and Applied Clinical Sciences, University of L’Aquila, Via Vetoio, Coppito 2, 67100 L’Aquila, Italy; (V.Z.); (C.C.); (R.C.); (M.D.V.N.); (E.A.); (F.Z.)
| | - Edoardo Alesse
- Department of Biotechnological and Applied Clinical Sciences, University of L’Aquila, Via Vetoio, Coppito 2, 67100 L’Aquila, Italy; (V.Z.); (C.C.); (R.C.); (M.D.V.N.); (E.A.); (F.Z.)
| | - Francesca Zazzeroni
- Department of Biotechnological and Applied Clinical Sciences, University of L’Aquila, Via Vetoio, Coppito 2, 67100 L’Aquila, Italy; (V.Z.); (C.C.); (R.C.); (M.D.V.N.); (E.A.); (F.Z.)
| | - Alessandra Tessitore
- Department of Biotechnological and Applied Clinical Sciences, University of L’Aquila, Via Vetoio, Coppito 2, 67100 L’Aquila, Italy; (V.Z.); (C.C.); (R.C.); (M.D.V.N.); (E.A.); (F.Z.)
- Center for Molecular Diagnostics and Advanced Therapies, University of L’Aquila, Via Petrini, 67100 L’Aquila, Italy
- Correspondence:
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Figarella-Branger D, Bouvier C, de Paula AM, Mokhtari K, Colin C, Loundou A, Chinot O, Metellus P. Molecular genetics of adult grade II gliomas: towards a comprehensive tumor classification system. J Neurooncol 2012; 110:205-13. [PMID: 22890969 DOI: 10.1007/s11060-012-0953-x] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2012] [Accepted: 07/30/2012] [Indexed: 12/19/2022]
Abstract
Adult grade II low-grade gliomas (LGG) are classified according to the WHO as astrocytomas, oligodendrogliomas or mixed gliomas. TP53 mutations and 1p19q codeletion are the main molecular abnormalities recorded, respectively, in astrocytomas and oligodendrogliomas and in mixed gliomas. Although IDH mutations (IDH1 or IDH2) are recorded in up to 85 % of low-grade gliomas, IDH negative gliomas do occur. We have searched for p53 expression, 1p19q codeletion and IDH status (immunohistochemical detection of the common R132H IDH1 mutation and IDH direct sequencing). Internexin alpha (INA) expression previously recorded to be associated with 1p19q codeletion (1p19q+) gliomas was also analysed. Low-grade gliomas were accurately classified into four groups: group 1, IDH+/p53-/1p19q-; group 2, IDH+/p53-/1p19q+; group 3, IDH+/p53+/1p19q-; and group 4, triple negative gliomas. In contrast to the WHO classification, this molecular classification predicts overall survival on uni- and multivariate analysis (P = 0.001 and P = 0.007, respectively). Group 4 carries the worst prognosis and group 2 the best. Interestingly, p53 +/INA- expression predicts lack of 1p19q codeletion (specificity 100 %, VPP 100 %). The combined use of these three molecular markers allow for an accurate prediction of survival in LGG. These findings could significantly modify LGG classification and may represent a new tool to guide patient-tailored therapy. Moreover, immunohistochemical detection of p53, INA and mR132H IDH1 expression could represent an interesting prescreening test to be performed before 1p19q codeletion, IDH1 minor mutation and IDH2 mutation detection.
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Affiliation(s)
- Dominique Figarella-Branger
- Service d'Anatomie Pathologique et de Neuropathologie, Hôpital de la Timone, Assistance Publique-Hôpitaux de Marseille, 13000, Marseille, France
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Logvina NA, Yakubovskaya MG, Dolinnaya NG. Rapid photometric detection of thymine residues partially flipped out of double helix as a method for direct scanning of point mutations and apurinic DNA sites. BIOCHEMISTRY (MOSCOW) 2011; 76:245-52. [PMID: 21568858 DOI: 10.1134/s0006297911020118] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
A spectroscopic assay for detection of extrahelical thymine residues in DNA heteroduplexes under their modification by potassium permanganate has been developed. The assay is based on increase in absorbance at 420 nm due to accumulation of thymidine oxidation intermediates and soluble manganese dioxide. The analysis was carried out using a set of 19-bp DNA duplexes containing unpaired thymidines opposite tetrahydrofuranyl derivatives mimicking a widespread DNA damage (apurinic (AP) sites) and a library of 50-bp DNA duplexes containing all types of base mismatches in different surroundings. The relation between the selectivity of unpaired T oxidation and the thermal stability of DNA double helix was investigated. The method described here was shown to discriminate between DNA duplexes with one or two AP sites and to reveal thymine-containing mismatches and all noncanonical base pairs in AT-surroundings. Comparative results of CCM analysis and the rapid photometric assay for mismatch detection are demonstrated for the first time in the same model system. The chemical reactivity of target thymines was shown to correlate with local disturbance of double helix at the mismatch site. As the spectroscopic assay does not require the DNA cleavage reaction and gel electrophoresis, it can be easily automated and used for primary screening of somatic mutations.
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Affiliation(s)
- N A Logvina
- Chemical Faculty, Lomonosov Moscow State University, Russia
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Yakubovskaya MG, Belyakova AA, Gasanova VK, Belitsky GA, Dolinnaya NG. Comparative reactivity of mismatched and unpaired bases in relation to their type and surroundings. Chemical cleavage of DNA mismatches in mutation detection analysis. Biochimie 2010; 92:762-71. [PMID: 20171258 DOI: 10.1016/j.biochi.2010.02.016] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2009] [Accepted: 02/12/2010] [Indexed: 10/19/2022]
Abstract
Systematic study of chemical reactivity of non-Watson-Crick base pairs depending on their type and microenvironment was performed on a model system that represents two sets of synthetic DNA duplexes with all types of mismatched and unmatched bases flanked by T.A or G.C pairs. Using comparative cleavage pattern analysis, we identified the main and additional target bases and performed quantitative study of the time course and efficacy of DNA modification caused by potassium permanganate or hydroxylamine. Potassium permanganate in combination with tetraethylammonium chloride was shown to induce DNA cleavage at all mismatched or bulged T residues, as well as at thymines of neighboring canonical pairs. Other mispaired (bulged) bases and thymine residues located on the second position from the mismatch site were not the targets for KMnO(4) attack. In contrast, hydroxylamine cleaved only heteroduplexes containing mismatched or unmatched C residues, and did not modify adjacent cytosines. However when G.C pairs flank bulged C residue, neighboring cytosines are also attacked by hydroxylamine due to defect migration. Chemical reactivity of target bases was shown to correlate strongly with the local disturbance of DNA double helix at mismatch or bulge site. With our model system, we were able to prove the absence of false-negative and false-positive results. Portion of heteroduplex reliably revealed in a mixture with corresponding homoduplex consists of 5% for bulge bases and "open" non-canonical pairs, and 10% for wobble base pairs giving minimal violations in DNA structure. This study provides a complete understanding of the principles of mutation detection methodology based on chemical cleavage of mismatches and clarifies the advantages and limitations of this approach in various biological and conformational studies of DNA.
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Affiliation(s)
- Marianna G Yakubovskaya
- Institute of Carcinogenesis, Blokhin Cancer Research Center, Russian Academy of Medical Sciences, Moscow 115478, Russia.
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Tabone T, Sallmann G, Cotton RGH. The chemical cleavage of mismatch for the detection of mutations in long DNA fragments. Methods Mol Biol 2009; 578:223-234. [PMID: 19768597 DOI: 10.1007/978-1-60327-411-1_14] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Methods to rapidly scan large regions of DNA that are not dependent on highly specific melting temperatures or suitable only for large-scale discovery are important to reduce the amount of sequencing required for DNA samples that appear to contain a mutation. This protocol describes the chemical cleavage of mismatch method to assess if a region of DNA contains a mutation and accurately localize the position of the mutation in the same reaction. To detect mutations, PCR heteroduplexes are incubated with two mismatch-specific reagents. Hydroxylamine modifies mismatched cytosine residues and potassium permanganate modifies mismatched thymine residues. The samples are then incubated with piperidine, which cleaves the DNA backbone at the site of the modified mismatched base. Cleavage products are separated by electrophoresis, revealing the identity and location of the mutation. The chemical cleavage of mismatch method can efficiently detect point mutations as well as insertions and deletions.
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Affiliation(s)
- Tania Tabone
- Ludwig Institute for Cancer Research, Parkville, Victoria, Australia
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Tabone T, Sallmann G, Chiotis M, Law M, Cotton R. Chemical cleavage of mismatch (CCM) to locate base mismatches in heteroduplex DNA. Nat Protoc 2007; 1:2297-304. [PMID: 17406471 DOI: 10.1038/nprot.2006.352] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
This protocol describes the use of the chemical cleavage of mismatch (CCM) method to assess whether a region of DNA contains mutations and to localize them. Compared with other mutation-detection techniques (such as single strand-conformation polymorphism (SSCP) analysis, denaturing high-performance liquid chromatography (DHPLC) and denaturing gradient gel electrophoresis (DGGE)) that detect mutations in short DNA fragments and require highly specific melting temperatures, CCM has a higher diagnostic sensitivity suited to the detection of mutations in tumor genes, and can analyze amplicons < or = 2 kb in length. To detect mutations, PCR heteroduplexes are incubated with two mismatch-specific reagents. Hydroxylamine modifies unpaired cytosine and potassium permanganate modifies unpaired thymine. The samples are then incubated with piperidine, which cleaves the DNA backbone at the site of the modified mismatched base. Cleavage products are separated by electrophoresis, revealing the identity and location of the mutation. The CCM method can efficiently detect point mutations as well as insertions and deletions. This protocol can be completed in 10 h.
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Affiliation(s)
- Tania Tabone
- Genomic Disorders Research Centre, St Vincent's Hospital, PO Box 2900, Victoria 3065, Australia
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Neschastnova AA, Yakubovskaya MG, Gasanova VK, Belitsky GA, Dolinnaya NG. Chemical cleavage of DNA duplexes with single base mismatches as a basis for detection of random point mutations. Mol Biol 2007. [DOI: 10.1134/s0026893307030144] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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De Galitiis F, Cannita K, Tessitore A, Martella F, Di Rocco ZC, Russo A, Adamo V, Iacobelli S, Martinotti S, Marchetti P, Ficorella C, Ricevuto E. Novel P53 mutations detected by FAMA in colorectal cancers. Ann Oncol 2006; 17 Suppl 7:vii78-83. [PMID: 16760300 DOI: 10.1093/annonc/mdl957] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
BACKGROUND The aim of the study was to identify p53 gene mutations by FAMA (fluorescence-assisted mismatch analysis) in colorectal cancers. PATIENTS AND METHODS Analytical scanning of the p53 gene (exons 5-9) was performed in colon cancer samples from 44 consecutive patients by FAMA. FAMA is a semiautomatic scanning approach based on the chemical cleavage of the mismatch in fluorescently labeled heteroduplex DNA, obtained from the combination of a normal and a mutated allele. FAMA has already shown optimal levels of diagnostic accuracy and sensitivity in detecting gene mutations (nucleotide substitutions, insertions/deletions) both at the germline and somatic level. The peculiar feature of FAMA is its ability to detect and localize mutations, by a redundant pattern of signals due to fluorescent DNA fragments generated by chemical cleavage. Moreover, previous data have demonstrated that normal contaminating DNA from stromal cells in the sample does not affect the sensitivity of the procedure, leading to the identification of the mutation even when the ratio mutant/normal allele is 10%. RESULTS Eighteen mutations (12 missense, one nonsense, two deletions, three nucleotide substitutions at the level of the splice-junctions) and two polymorphisms were detected by FAMA in 17 patients (39%) and then confirmed by automated sequence analysis. Six of 18 mutations (33%) were not previously reported for colon cancer samples and two of 18 lesions (11%) were identified as novel p53 mutations. CONCLUSIONS Analytical scanning of the p53 gene by FAMA in DNA from colon cancer samples provides a sensitive, accurate and specific diagnostic procedure for routine clinical application.
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Affiliation(s)
- F De Galitiis
- U.O. Medical Oncology, San Salvatore Hospital, University of L'Aquila, Italy
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Neschastnova AA, Gasanova VK, Popenko VI, Lambrinakos A, Belitsky GA, Cotton RGH, Yakubovskaya MG. Spontaneous DNA-DNA interaction of homologous duplexes and factors affecting the result of heteroduplex formation. Biol Chem 2006; 387:257-61. [PMID: 16542146 DOI: 10.1515/bc.2006.034] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Mutation detection and mismatch repair investigations based on heteroduplex formation require a linear DNA structure. DNA branching, described previously under physiological conditions, has been analysed in the heteroduplex formation process. Symmetrical chi-structures were detected after heteroduplex formation by gel electrophoresis and electron microscopy. Buffer composition, DNA concentration and duplex end-sequences influence DNA branching. Duplexes with homologous central regions but non-complementary ends do not form hybrid heteroduplexes or hybrid Holliday junctions. Our results explain the requirements for efficient heteroduplex formation, which were previously determined empirically: special solution composition, optimal DNA concentration and GC clamps. This provides the theoretical background for further optimisation of the procedure.
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Affiliation(s)
- Anna A Neschastnova
- Institute of Carcinogenesis, Blokhin Cancer Research Centre, Russian Academy of Medical Sciences, Kashirskoye Shosse 24, Moscow 115478, Russia.
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Lambrinakos A, Yakubovskaya M, Babon JJ, Neschastnova AA, Vishnevskaya YV, Belitsky GA, D'Cunha G, Horaitis O, Cotton RGH. NovelTP53 gene mutations in tumors of Russian patients with breast cancer detected using a new solid phase chemical cleavage of mismatch method and identified by sequencing. Hum Mutat 2004; 23:186-192. [PMID: 14722922 DOI: 10.1002/humu.10298] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Mutations in the tumor-suppressor p53 gene TP53 are frequent in most human cancers including breast cancer. A new solid phase chemical cleavage of mismatch method (CCM) allowed rapid and efficient screening and analysis of the TP53 gene in DNA samples extracted from tumors of 89 breast cancer patients. The novel CCM technique utilized silica beads and the potassium permanganate/tetraethylammonium chloride (KMnO(4)/TEAC) and hydroxylamine (NH(2)OH) reactions were performed sequentially in a single tube. Mutation analysis involved amplification of five different fragments of the TP53 gene using DNA from the 89 tumor samples, then pairing of the 391 labeled PCR products and forming heteroduplexes. A total of 41 unique signals were revealed in the analysis of TP53 exons 5-9 and eight were identified by direct sequencing. The three novel mutations detected are c.600T>G (p.Asn200Lys), c.601T>G (p.Leu201Val), and c.766-768delACA (p.Thr256del). The detected mutations c.638G>T (p.Arg213Leu), c.730G>T (p.Gly244Cys), and c.758C>T (p.Thr253Ile) have not been reported in breast cancer but have been recorded in tumors of other organs. A previously reported mutation c.535C>T (p.His179Tyr) and a heterozygous polymorphism c.639A>G were also detected. Of the 41 unique signals, 36 were not identified as a sequence change. As direct sequencing requires the mutant allele concentration to be greater than 30% when the mutant allele is present in a mixture with the wild-type allele, the CCM method represents a more sensitive technique requiring a lower mutant allele concentration in the wild-type mixture compared with direct sequencing. This reveals the advantage of CCM for unknown point mutation detection in DNA samples of cancer patients.
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Affiliation(s)
- A Lambrinakos
- Genomic Disorders Research Centre, Daly Wing, St. Vincent's Hospital, Melbourne, Victoria, Australia
| | - M Yakubovskaya
- Carcinogenesis Institute, Cancer Research Centre, Russian Academy of Medical Sciences, Moscow, Russia
| | - J J Babon
- Genomic Disorders Research Centre, Daly Wing, St. Vincent's Hospital, Melbourne, Victoria, Australia
| | - A A Neschastnova
- Carcinogenesis Institute, Cancer Research Centre, Russian Academy of Medical Sciences, Moscow, Russia
| | - Ya V Vishnevskaya
- Carcinogenesis Institute, Cancer Research Centre, Russian Academy of Medical Sciences, Moscow, Russia
| | - G A Belitsky
- Carcinogenesis Institute, Cancer Research Centre, Russian Academy of Medical Sciences, Moscow, Russia
| | - G D'Cunha
- Genomic Disorders Research Centre, Daly Wing, St. Vincent's Hospital, Melbourne, Victoria, Australia
| | - O Horaitis
- Genomic Disorders Research Centre, Daly Wing, St. Vincent's Hospital, Melbourne, Victoria, Australia
| | - R G H Cotton
- Genomic Disorders Research Centre, Daly Wing, St. Vincent's Hospital, Melbourne, Victoria, Australia
- Department of Medicine, The University of Melbourne, Victoria, Australia
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Marchetti P, Cannita K, Ricevuto E, De Galitiis F, Di Rocco ZC, Tessitore A, Bisegna R, Porzio G, De Rubeis GP, Ventura T, Martinotti S, Ficorella C. Prognostic value of p53 molecular status in high-risk primary breast cancer. Ann Oncol 2003; 14:704-8. [PMID: 12702523 DOI: 10.1093/annonc/mdg197] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Mutations in the p53 gene are the most common genetic alterations in human primary breast carcinoma and these mutations are often associated with worse prognosis and chemo/radioresistance. PATIENTS AND METHODS The analysis of the p53 gene was performed by fluorescence-assisted mismatch analysis in 13 consecutive high-risk primary breast cancer (HR-BC) patients with 10 or more involved axillary nodes to evaluate its prognostic value. RESULTS Three p53 mutations (23%) and four allelic variants were detected. After a median follow-up of 52 months the HR-BC disease-free survival (DFS) was 51% and overall survival 79%. All patients harboring a p53 mutation (p53(mut)) relapsed within 10 months of the median DFS while 67% of those showing a wild-type p53 status (p53(wt)) survive disease-free at a median follow-up of 43 months. One p53(mut) patient is still alive while all the p53(wt) patients survive at 56 months median follow-up. Two out of the four p53(wt) relapsing breast cancer patients showed the Arg72Pro allelic variant; one of these died at 75 months. CONCLUSIONS p53 mutations may help identify a subset of very high risk breast cancer patients (vHR-BC) with worse prognosis.
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Affiliation(s)
- P Marchetti
- Department of Experimental Medicine, University of L'Aquila, L'Aquila, Italy
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