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Papanikolaou V, Chrysovergis A, Mastronikolis S, Tsiambas E, Ragos V, Peschos D, Spyropoulou D, Pantos P, Niotis A, Mastronikolis N, Kyrodimos E. Impact of K-Ras Over-expression in Laryngeal Squamous Cell Carcinoma. In Vivo 2021; 35:1611-1615. [PMID: 33910843 DOI: 10.21873/invivo.12418] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Revised: 03/06/2021] [Accepted: 03/08/2021] [Indexed: 12/16/2022]
Abstract
BACKGROUND/AIM Oncogene up-regulation combined with suppressor gene down-regulation is a crucial genetic combination that promotes cell neoplastic phenotype and progressively malignant transformation in solid malignancies, including laryngeal squamous cell carcinoma (LSCC). Among oncogenes, the Kirsten ras oncogene homolog (K-Ras) is involved in LSCC onset and progression. PATIENTS AND METHODS Sixty (n=60) primary LSCC tissue sections were analyzed by immunohistochemistry (IHC). Digital image analysis (DIA) was also implemented for measuring K-Ras protein expression levels. RESULTS High K-Ras protein expression levels were observed in 20/60 (33.3%) LSCC tissue sections, whereas the rest of the cases (n=40; 66.7%) demonstrated low expression. Overall K-Ras expression was borderline significantly associated to the grade of the examined malignancies (p=0.048), whereas no other strong statistical correlations were identified. A progressive K-Ras overexpression was observed in all grades of the examined cases. CONCLUSION K-Ras over expression is correlated to a progressive dedifferentiation in LSCC.
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Affiliation(s)
| | | | | | | | - Vasileios Ragos
- Department of Maxillofacial Surgery, Medical School, University of Ioannina, Ioannina, Greece
| | - Dimitrios Peschos
- Department of Physiology, Medical School, University of Ioannina, Ioannina, Greece
| | - Despoina Spyropoulou
- Department of Radiation Oncology, Medical School, University of Patras, Patras, Greece
| | - Pavlos Pantos
- 1 ENT Department, Hippocration Hospital, University of Athens, Athens, Greece
| | | | | | - Efthymios Kyrodimos
- 1 ENT Department, Hippocration Hospital, University of Athens, Athens, Greece
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Changes in the genetic landscape during the malignization of high grade squamous intraepithelial lesion into cervical cancer. Curr Probl Cancer 2020; 44:100567. [PMID: 32201051 DOI: 10.1016/j.currproblcancer.2020.100567] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Revised: 02/12/2020] [Accepted: 02/27/2020] [Indexed: 11/22/2022]
Abstract
In 5 patients, a change in the genetic landscape from HPV16 positive high-grade squamous intraepithelial lesion (HSIL) to squamous cervical cancer was traced, which occurred in these patients within the period from 7 months to 5 years after diagnosing HSIL. MATERIALS AND METHODS The DNA from paraffin blocks of dysplasia tissue and the tumor that emerged afterwards was used for the study, which was analyzed using the OncoScan FFPE microarray Assay Kit Affymetrix (USA) for genome-wide determination of gene abundance and 65 key somatic driver mutations of oncogenes and tumor suppressor genes. RESULTS In the study of HSIL material, somatic mutations were observed in 4/5 cases, 18 different somatic driver mutations of the NRAS, EGFR, BRAF, KRAS, IDH2 oncogenes and TP53 suppressor genes were found and almost no CNA-Copy Number Aberration was identified. HSIL malignization is associated with the appearance of secondary driver mutations in oncogenes and tumor suppressor genes and a large number of structural and numerical CNA, the frequency of which correlates with the time of dysplasia malignization into cancer with a very high correlation coefficient r = 0.98, P = 0.004. The trees of dysplasia evolution into tumor were constructed for each patient. CONCLUSION According to the results of the work, it is assumed that the initiation of the development of mucosa dysplastic changes is due to primary driver mutations. The formation of secondary driver mutations and CNA are genetic mechanisms of malignant transformation, while the scenarios of the evolution of dysplasia into a tumor are individual and very diverse.
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Casadei Gardini A, Capelli L, Ulivi P, Giannini M, Freier E, Tamberi S, Scarpi E, Passardi A, Zoli W, Ragazzini A, Amadori D, Frassineti GL. KRAS, BRAF and PIK3CA status in squamous cell anal carcinoma (SCAC). PLoS One 2014; 9:e92071. [PMID: 24642661 PMCID: PMC3958420 DOI: 10.1371/journal.pone.0092071] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2013] [Accepted: 02/18/2014] [Indexed: 12/31/2022] Open
Abstract
Anti-EGFR therapy appears to be a potential treatment option for squamous cell anal carcinoma (SCAC). KRAS mutation is a rare event in SCAC, indicating the absence of the principal mechanism of resistance to this type of therapy. However, no information is available from the literature regarding the status of BRAF or PIK3CA in this cancer type. We analysed KRAS, BRAF and PIK3CA status in SCAC patients in relation to the clinical-pathological characteristics of patients and to the presence of the human papilloma virus (HPV). One hundred and three patients were treated with the Nigro scheme for anal cancer from March 2001 to August 2012. Fifty patients were considered for the study as there was insufficient paraffin-embedded tumour tissue to perform molecular analysis the remaining 53. DNA was extracted from paraffin-embedded sections. KRAS, BRAF and PIK3CA gene status and HPV genotype were evaluated by pyrosequencing. KRAS and BRAF genes were wild-type in all cases. Conversely, PIK3CA gene was found to be mutated in 11 (22%) cases. In particular, 8 mutations occurred in exon 9 and 3 in exon 20 of the PIK3CA gene. These findings suggest that SCAC could potentially respond to an anti-EGFR drug. PIK3CA mutation may be involved in the process of carcinogenesis in some cases of SCAC.
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Affiliation(s)
- Andrea Casadei Gardini
- Istituto Scientifico Romagnolo per lo Studio e la Cura dei Tumori (IRST) IRCCS, Meldola, Italy
- * E-mail:
| | - Laura Capelli
- Istituto Scientifico Romagnolo per lo Studio e la Cura dei Tumori (IRST) IRCCS, Meldola, Italy
| | - Paola Ulivi
- Istituto Scientifico Romagnolo per lo Studio e la Cura dei Tumori (IRST) IRCCS, Meldola, Italy
| | | | - Eva Freier
- Oncology Unit, Degli Infermi Hospital, Faenza, Italy
| | | | - Emanuela Scarpi
- Istituto Scientifico Romagnolo per lo Studio e la Cura dei Tumori (IRST) IRCCS, Meldola, Italy
| | - Alassandro Passardi
- Istituto Scientifico Romagnolo per lo Studio e la Cura dei Tumori (IRST) IRCCS, Meldola, Italy
| | - Wainer Zoli
- Istituto Scientifico Romagnolo per lo Studio e la Cura dei Tumori (IRST) IRCCS, Meldola, Italy
| | - Angela Ragazzini
- Istituto Scientifico Romagnolo per lo Studio e la Cura dei Tumori (IRST) IRCCS, Meldola, Italy
| | - Dino Amadori
- Istituto Scientifico Romagnolo per lo Studio e la Cura dei Tumori (IRST) IRCCS, Meldola, Italy
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Santin AD, Sill MW, McMeekin DS, Leitao MM, Brown J, Sutton GP, Van Le L, Griffin P, Boardman CH. Phase II trial of cetuximab in the treatment of persistent or recurrent squamous or non-squamous cell carcinoma of the cervix: a Gynecologic Oncology Group study. Gynecol Oncol 2011; 122:495-500. [PMID: 21684583 DOI: 10.1016/j.ygyno.2011.05.040] [Citation(s) in RCA: 72] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2011] [Revised: 05/23/2011] [Accepted: 05/29/2011] [Indexed: 10/18/2022]
Abstract
PURPOSE The Gynecologic Oncology Group (GOG) conducted a phase II trial to assess the efficacy and tolerability of the anti-EGFR antibody cetuximab, in persistent or recurrent carcinoma of the cervix. PATIENTS AND METHODS Eligible patients had cervical cancer, measurable disease, and GOG performance status ≤2. Treatment consisted of cetuximab 400 mg/m(2) initial dose followed by 250 mg/m(2) weekly until disease progression or prohibitive toxicity. The primary endpoints were progression-free survival (PFS) at 6 months and response. The study used a 2-stage group sequential design. RESULTS Thirty-eight patients were entered with 3 exclusions, leaving 35 evaluable for analysis. Thirty-one patients (88.6%) received prior radiation as well as either 1 (n=25, 71.4%) or 2 (n=10) prior cytotoxic regimens. Twenty-four patients (68.6%) had a squamous cell carcinoma. Grade 3 adverse events possibly related to cetuximab included dermatologic (n=5), GI (n=4), anemia (n=2), constitutional (n=3), infection (n=2), vascular (n=2), pain (n=2), and pulmonary, neurological, vomiting and metabolic (n=1 each). No clinical responses were detected. Five patients (14.3%; two-sided 90% CI, 5.8% to 30%) survived without progression for at least 6 months. The median PFS and overall survival (OS) times were 1.97 and 6.7 months, respectively. In this study, all patients with PFS at 6 months harbored tumors with squamous cell histology. CONCLUSION Cetuximab is well tolerated but has limited activity in this population. Cetuximab activity may be limited to patients with squamous cell histology.
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Affiliation(s)
- Alessandro D Santin
- Yale University School of Medicine, Department of Obstetrics, Gynecology & Reproductive Sciences, New Haven, CT 06520-8063, USA.
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Genetic alterations in the K-Ras gene influence the prognosis in patients with cervical cancer treated by radiotherapy. Int J Gynecol Cancer 2011; 21:86-91. [PMID: 21330833 DOI: 10.1097/igc.0b013e3182049924] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
INTRODUCTION A high incidence of K-Ras mutations has been identified in a variety of human cancers, especially in codon 12, 13, and 61. Nevertheless, the presence of K-Ras mutations in cervical cancer remains controversial. The aim of this study was to investigate possible mutations in exon 1 and 2 of the K-Ras gene and to assess whether K-Ras mutation status had prognostic and predictive significance and were linked to clinicopathological parameters. METHODS Genomic DNA from 107 patients with cervical cancer, treated with radiochemotherapy, were examined for mutations in the coding exons 1 and 2, including exon/intron borders of the K-Ras gene using single-stranded conformation polymorphism and sequence analyses. RESULTS K-Ras mutations were detected in 11 patients (10%). Seven tumors showed a mutation in codon 59, 3 tumors in codon 38, and 1 tumor in codon 13. In 6 of the cases with a mutation in codon 59, an additional alteration located in codon 65 was found.Patients with K-Ras mutations had significantly worse recurrence-free survival (P = 0.03), and an association between K-Ras status and distant metastases was also seen (P = 0.04). CONCLUSIONS The present data indicate that K-Ras mutations are relatively uncommon in cervical cancer but associates with poorer prognosis, especially in the subset of squamous cell carcinomas. There is a need for new markers in cervical cancer to improve individual treatment, but whether K-Ras mutation status is a potential biomarker in this situation needs further investigations in larger tumor series and in more regions of the K-Ras gene.
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Deschoolmeester V, Van Marck V, Baay M, Weyn C, Vermeulen P, Van Marck E, Lardon F, Fontaine V, Vermorken JB. Detection of HPV and the role of p16INK4A overexpression as a surrogate marker for the presence of functional HPV oncoprotein E7 in colorectal cancer. BMC Cancer 2010; 10:117. [PMID: 20346145 PMCID: PMC2868049 DOI: 10.1186/1471-2407-10-117] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2009] [Accepted: 03/26/2010] [Indexed: 12/28/2022] Open
Abstract
Background Based on the well-recognized etiological role of human papillomavirus (HPV) in cervical, anogenital and oropharyngeal carcinogenesis, a potential role of HPV in colorectal carcinogenesis has been suggested. For that reason, the aim of the present study was to investigate the presence of HPV DNA in colorectal carcinomas (CRC) and to study overexpression of p16INK4A as a marker for the presence of an active HPV oncoprotein E7. These findings were correlated with clinical and pathological prognostic factors of CRC. Methods The presence of HPV was assessed using a multiplex PCR system of 10 non-biotinylated primers. The amplified fragments of HPV positive samples were further analyzed by a highly sensitive, broad spectrum SPF10 PCR and subsequently genotyped using reverse hybridization in a line probe assay. P16INK4A protein expression was investigated in a subset of 90 (30 HPV positive and 60 HPV negative) CRC samples by immunohistochemistry. Results HPV DNA was found in 14.2% of the CRC samples with HPV16 as the most prevalent type. No significant differences in clinical and pathological variables were found between HPV positive and negative CRCs, except for age. HPV positive patients were significantly younger (p = 0.05). There was no significant correlation between the presence of HPV and overexpression of p16INK4A (p = 0.325). Conclusions In conclusion, the presence of oncogenic HPV DNA in a small cohort of CRC samples may suggest that HPV may be involved in the carcinogenesis of some CRC. However, contrary to what has been observed in head and neck squamous cell cancer and cancer of the uterine cervix, p16INK4A does not seem to be a surrogate marker for an active HPV infection in CRC. Therefore, further functional analyses are necessary to elucidate the role of HPV in CRC.
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Affiliation(s)
- Vanessa Deschoolmeester
- Laboratory of Cancer Research and Clinical Oncology, Department of Medical Oncology, University of Antwerp (UA/UZA), Wilrijk, Belgium.
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Noordhuis MG, Eijsink JJ, ten Hoor KA, Roossink F, Hollema H, Arts HJ, Pras E, Maduro JH, Reyners AK, de Bock GH, Wisman GBA, Schuuring E, van der Zee AG. Expression of Epidermal Growth Factor Receptor (EGFR) and Activated EGFR Predict Poor Response to (Chemo)radiation and Survival in Cervical Cancer. Clin Cancer Res 2009; 15:7389-97. [DOI: 10.1158/1078-0432.ccr-09-1149] [Citation(s) in RCA: 85] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Narisawa-Saito M, Yoshimatsu Y, Ohno SI, Yugawa T, Egawa N, Fujita M, Hirohashi S, Kiyono T. An In vitro Multistep Carcinogenesis Model for Human Cervical Cancer. Cancer Res 2008; 68:5699-705. [DOI: 10.1158/0008-5472.can-07-6862] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Buyru N, Tezol A, Dalay N. Coexistence of K-ras mutations and HPV infection in colon cancer. BMC Cancer 2006; 6:115. [PMID: 16672071 PMCID: PMC1481576 DOI: 10.1186/1471-2407-6-115] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2006] [Accepted: 05/04/2006] [Indexed: 02/08/2023] Open
Abstract
BACKGROUND Activation of the ras genes or association with human papillomavirus infection have been extensively studied in colorectal cancer. However, the correlation between K-ras mutations and HPV in colorectal cancer has not been investigated yet. In this study we aimed to investigate the presence of K-ras mutations and their correlation with HPV infection in colon cancer. METHODS K-ras mutations were analyzed by a mutagenic PCR assay and digestion with specific restriction enzymes to distinguish the wild-type and mutant codons. HPV infection was analyzed by PCR amplification and hybridization with specific probes by Southern blotting. Statistical analyses were performed by the chi-square and Fisher's exact tests RESULTS HPV gene fragments were detected in 43 tumors and 17 normal tissue samples. HPV 18 was the prevalent type in the tumor tissue. A mutation at codon 12 of the K-ras gene was present in 31 patients. 56% of the HPV-positive tumors also harbored a K-ras mutation. Codon 13 mutations were not observed. These data indicate that infection with high risk HPV types and mutational activation of the K-ras gene are frequent events in colorectal carcinogenesis. CONCLUSION Our findings suggest that mutational activation of the K-ras gene is a common event in colon carcinogenesis and that HPV infection may represent an important factor in the development of the premalignant lesions leading to the neoplastic phenotype.
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Affiliation(s)
- Nur Buyru
- Department of Medical Biology, Cerrahpasa Medical Faculty, Istanbul University, Istanbul, Turkey
| | - Ayda Tezol
- Department of Medical Biology, Cerrahpasa Medical Faculty, Istanbul University, Istanbul, Turkey
| | - Nejat Dalay
- Oncology Institute, Istanbul University, Istanbul, Turkey
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Pappa KI, Choleza M, Markaki S, Giannikaki E, Kyroudi A, Vlachos G, Voulgaris Z, Anagnou NP. Consistent absence of BRAF mutations in cervical and endometrial cancer despite KRAS mutation status. Gynecol Oncol 2006; 100:596-600. [PMID: 16256179 DOI: 10.1016/j.ygyno.2005.09.029] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2005] [Revised: 09/12/2005] [Accepted: 09/19/2005] [Indexed: 10/25/2022]
Abstract
BACKGROUND Mutational activation of KRAS and BRAF proto-oncogenes contributes to the development of many human cancers. Current research on gynecological cancer and specifically in cervical and endometrial cancer is focused on the mechanisms of their mutational activation. OBJECTIVES In view of the paucity of data on their mutation frequency and the status of BRAF in these two types of gynecological cancer, we performed a systematic molecular study in 114 clinically and histologically well-defined malignant tumors of uterine cervix and endometrium and correlated the mutation status of KRAS and BRAF with the age at diagnosis and with tumor grade, stage or histological type. METHODS Direct sequence analysis of the PCR products of KRAS and BRAF genes was used to screen for known activating mutations. RESULTS In 67 cases of endometrial cancer, six KRAS mutations (8.9%) were found, four at codon 12 (5.9%) and two at codon 13 (2.9%), while no mutation was detected at codon 61. Most of the mutations occurred in surgical stage I and in the endometrioid adenocarcinoma subtype. We also detected three KRAS point mutations (6.3%) in the 47 cervical cancer samples, two at codon 12 (4.2%) and one at codon 13 (2.1%), while there was no mutation at codon 61. On the contrary, no mutation was identified in BRAF exon 15 for either endometrial or cervical cancer samples at position V600, which represents the most frequently mutated site of BRAF in human cancer. There was no association between KRAS mutations with either histological type, tumor grade or stage. Interestingly, however, KRAS mutation status in endometrial cancer was strongly associated with increased age at diagnosis (P < 0.001). CONCLUSIONS Our data document (a) the absence of BRAF mutations in cervical and endometrial cancer, despite the mutation status of KRAS, (b) suggest that KRAS mutations reflect an early event in endometrial carcinogenesis and (c) imply that BRAF activation is involving alternative pathways in these two types of cancer.
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Affiliation(s)
- Kalliopi I Pappa
- Department of Basic Sciences, University of Athens School of Medicine, 115 27 Athens, Greece.
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