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Čēma I, Dzudzilo M, Kleina R, Franckevica I, Svirskis Š. Correlation of Soluble CD44 Expression in Saliva and CD44 Protein in Oral Leukoplakia Tissues. Cancers (Basel) 2021; 13:cancers13225739. [PMID: 34830890 PMCID: PMC8616328 DOI: 10.3390/cancers13225739] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Revised: 11/09/2021] [Accepted: 11/14/2021] [Indexed: 11/16/2022] Open
Abstract
The aim of this study was to determine whether and how pan-CD44 protein expression in leukoplakia tissues correlates with positive SolCD44 test presence and their role in oral leukoplakia. SolCD44 and total protein expression in saliva were determined using an OncAlert® Oral Cancer Rapid test. Comparison of paired associations of total protein, SolCD44, mean number of CD44 expressed epithelial layers in leukoplakia tissue, and macrophages below the basement membrane between control group and patients with leukoplakia showed statistically significant results (p < 0.0001). It is shown that the total protein indicates low or elevated risk of possible malignant transformation processes in leukoplakia. Statistically significant differences between higher total protein level and clinical forms of oral leukoplakia (p < 0.0001), as well as CD44-labeled epithelial cell layer decrease (p < 0.0001), were found. This possibly points to the onset of the stemness loss in leukoplakia tissue. CD9 antigen expression in the exosomes of the oral epithelium explained the intercellular flow of SolCD44 and other fluids in the leukoplakia area. We conclude that the OncAlert® Oral Cancer Rapid test is a valuable screening method in daily clinical practice, in terms of complementing clinical diagnostics methods and to assess the potential for early malignancy.
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Affiliation(s)
- Ingrīda Čēma
- Department of Oral Medicine, Rīga Stradiņš University, 16 Dzirciema Str., LV-1007 Rīga, Latvia
- Correspondence:
| | - Madara Dzudzilo
- Doctoral Study Department, Rīga Stradiņš University, 16 Dzirciema Str., LV-1007 Rīga, Latvia;
| | - Regīna Kleina
- Department of Pathology, Rīga Stradiņš University, 16 Dzirciema Str., LV-1007 Rīga, Latvia;
| | - Ivanda Franckevica
- Department of Pathology, Children’s Clinical University Hospital, Vienības Gatve 45, LV-1004 Rīga, Latvia;
| | - Šimons Svirskis
- Institute of Microbiology and Virology, Rīga Stradiņš University, 5 Rātsupītes Str., LV-1067 Rīga, Latvia;
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Hildebrand LC, Carvalho AL, Lauxen IS, Nör JE, Cerski CTS, Sant'Ana Filho M. Spatial distribution of cancer stem cells in head and neck squamous cell carcinomas. J Oral Pathol Med 2014; 43:499-506. [PMID: 24527751 DOI: 10.1111/jop.12169] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/06/2014] [Indexed: 02/06/2023]
Abstract
BACKGROUND CD44 and aldehyde dehydrogenase 1 (ALDH1) are considered putative markers of highly tumorigenic cells (i.e., cancer stem-like cells) in head and neck squamous cell carcinomas. This small subset of cells is believed to be the primary responsible for tumor initiation and progression. The objectives of this study were (i) to evaluate the patterns of CD44 and ALDH1 expression in the tumor center and in the invasive front, as well as in adjacent non-tumor epithelium, and (ii) to correlate these findings with clinical parameters. MATERIALS AND METHODS The sample comprised 44 patients with primary head and neck squamous cell carcinomas. Hematoxylin and eosin (HE) staining was used for histopathological tumor grading and for morphological analysis of adjacent non-tumor epithelium. Semiquantitative analysis was performed in histological sections immunostained for CD44 and ALDH1. RESULTS ALDH1 immunostaining in the invasive front showed positive association with tumor size, regional metastasis, tumor histopathological grading, and disease progression. Moreover, expression of this marker in both tumor invasive front and adjacent non-tumor epithelium was related with more aggressive tumors. CD44 immunostaining was heterogeneous in all areas evaluated and did not show association with clinical data. CONCLUSION Collectively, these data suggest that ALDH1 immunostaining in the invasive front and in adjacent non-tumor epithelium may help identify tumors with a more aggressive behavior, potentially contributing to improving treatment customization and the monitoring of patients with head and neck cancer.
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Affiliation(s)
- Laura C Hildebrand
- Oral Pathology, School of Dentistry, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
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Chen J, Zhou J, Lu J, Xiong H, Shi X, Gong L. Significance of CD44 expression in head and neck cancer: a systemic review and meta-analysis. BMC Cancer 2014; 14:15. [PMID: 24410905 PMCID: PMC3893437 DOI: 10.1186/1471-2407-14-15] [Citation(s) in RCA: 95] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2013] [Accepted: 01/06/2014] [Indexed: 02/08/2023] Open
Abstract
BACKGROUND CD44 has been reported to be involved with tumor growth and metastasis and has also been implicated as a CSC marker in head and neck squamous cell cancer (HNSCC). However, the prognostic value of CD44 still remains controversial; hence, we investigated the correlation between CD44 and the clinicopathological features of HNSCC by meta-analysis. METHODS A comprehensive search was performed using PubMed, ISI web of Science and China National Knowledge Infrastructure (CNKI) up to April 2013. Only studies with immunohistochemical staining of HNSCC were considered. Data on TNM classification, tumor grade, disease free survival and 3- or 5-year overall survival rate were extracted. RESULTS Thirty studies with 2102 patients met the inclusion criteria for the meta-analysis. Fifteen studies used anti-pan-CD44 antibody, 9 used anti-CD44-v6 antibody, 2 used anti-CD44-v3 and 2 used anti-CD44s antibody, 1 used anti-CD44-v9, and 1 used anti-CD44-v6,-v3 and -v4-5 simultaneously. The total percentage of CD44 expression was 57.8%, with 49.3% in oral cancer patients, 66.4% in pharynx and 54.7% in larynx cancer patients expressing CD44. No significant correlation between clinical features and CD44 expression was revealed for oral cancer patients, but CD44 was shown to be associated with advanced T categories (larynx: RR = 1.33, 95% CI 1.01-1.76; larynx & pharynx RR = 1.21, 95% CI 1.08-1.35), worse N categories (larynx: RR = 2.53, 95% CI 1.99-3.21; larynx & pharynx RR = 1.95, 95% CI 1.35-2.82), higher tumor grades (larynx & pharynx RR = 1.71, 95% CI 1.04-2.79) and 5-year OS rates (larynx: RR = 0.62, 95% CI 0.47-0.83; larynx & pharynx RR = 0.66, 95% CI 0.47-0.94) in patients with laryngeal and pharyngolaryngeal cancer. In stratified analysis, pan-CD44 and CD44-v6 expression were both correlated with 5-year OS rate of patients with laryngeal (CD44: RR = 0.66, 95% CI 0.46-0.95; CD44-v6 RR = 0.53, 95% CI 0.37-0.77) and pharyngolaryngeal cancer (CD44: RR = 0.56, 95% CI 0.34-0.93; CD44-v6 RR = 0.53, 95% CI 0.37-0.77). CONCLUSIONS Our analysis suggested that CD44 is related to worse T category, N category, tumor grade and prognosis, in pharyngeal and laryngeal cancer, but no clear association was revealed between CD44 expression and oral cancer.
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Affiliation(s)
- Jianqiang Chen
- Department of Otorhinolaryngology, Affiliated Cixi Hospital of Wenzhou Medical, College, Cixi 315300, China
| | - Jianding Zhou
- Department of Otorhinolaryngology, Affiliated Cixi Hospital of Wenzhou Medical, College, Cixi 315300, China
| | - Jie Lu
- Department of Otorhinolaryngology, Affiliated Cixi Hospital of Wenzhou Medical, College, Cixi 315300, China
| | - Hua Xiong
- Department of Otorhinolaryngology, Affiliated Cixi Hospital of Wenzhou Medical, College, Cixi 315300, China
| | - Xueli Shi
- Department of Otorhinolaryngology, Affiliated Cixi Hospital of Wenzhou Medical, College, Cixi 315300, China
| | - Liang Gong
- Department of Otorhinolaryngology, Affiliated Cixi Hospital of Wenzhou Medical, College, Cixi 315300, China
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Kidwai F, Costea DE, Hutchison I, Mackenzie I. The effects of CD44 down-regulation on stem cell properties of head and neck cancer cell lines. J Oral Pathol Med 2013; 42:682-90. [DOI: 10.1111/jop.12076] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/04/2013] [Indexed: 01/23/2023]
Affiliation(s)
- Fahad Kidwai
- Faculty of Dentistry; National University of Singapore; Singapore
| | - Daniela E. Costea
- Section for Pathology; Clinical Institute 1; University of Bergen; Bergen Norway
| | - Iain Hutchison
- Department of Oral and Maxillofacial Surgery; Barts and The London School of Medicine and Dentistry; London UK
| | - Ian Mackenzie
- Blizard Institute; Barts and The London School of Medicine and Dentistry; Queen Mary University of London; London UK
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Rajarajan A, Stokes A, Bloor BK, Ceder R, Desai H, Grafström RC, Odell EW. CD44 expression in oro-pharyngeal carcinoma tissues and cell lines. PLoS One 2012; 7:e28776. [PMID: 22242150 PMCID: PMC3252301 DOI: 10.1371/journal.pone.0028776] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2011] [Accepted: 11/15/2011] [Indexed: 11/19/2022] Open
Abstract
Expression of CD44, a transmembrane hyaluronan-binding glycoprotein, is variably considered to have prognostic significance for different cancers, including oral squamous cell carcinoma. Although unclear at present, tissue-specific expression of particular isoforms of CD44 might underlie the different outcomes in currently available studies. We mined public transcriptomics databases for gene expression data on CD44, and analyzed normal, immortalized and tumour-derived human cell lines for splice variants of CD44 at both the transcript and protein levels. Bioinformatics readouts, from a total of more than 15,000 analyses, implied an increased CD44 expression in head and neck cancer, including increased expression levels relative to many normal and tumor tissue types. Also, meta-analysis of over 260 cell lines and over 4,000 tissue specimens of diverse origins indicated lower CD44 expression levels in cell lines compared to tissue. With minor exceptions, reverse transcribed polymerase chain reaction identified expression of the four main isoforms of CD44 in normal oral keratinocytes, transformed lines termed DT and HaCaT, and a series of paired primary and metastasis-derived cell lines from oral or pharyngeal carcinomas termed HN4/HN12, HN22/HN8 and HN30/HN31. Immunocytochemistry, Western blotting and flow cytometric assessments all confirmed the isoform expression pattern at the protein level. Overall, bioinformatic processing of large numbers of global gene expression analyses demonstrated elevated CD44 expression in head and neck cancer relative to other cancer types, and that the application of standard cell culture protocols might decrease CD44 expression. Additionally, the results show that the many variant CD44 exons are not fundamentally deregulated in a diverse range of cultured normal and transformed keratinocyte lines.
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Affiliation(s)
- Abirami Rajarajan
- Molecular Oncology, Department of Oral Pathology, King's College London, London, United Kingdom
| | - Angela Stokes
- Molecular Oncology, Department of Oral Pathology, King's College London, London, United Kingdom
- * E-mail:
| | - Balvinder K. Bloor
- Molecular Oncology, Department of Oral Pathology, King's College London, London, United Kingdom
| | - Rebecca Ceder
- Institute of Environmental Medicine, Division of Molecular Toxicology, Karolinska Institutet, Stockholm, Sweden
| | - Hemini Desai
- Molecular Oncology, Department of Oral Pathology, King's College London, London, United Kingdom
| | - Roland C. Grafström
- Institute of Environmental Medicine, Division of Molecular Toxicology, Karolinska Institutet, Stockholm, Sweden
- VTT Technical Research Centre of Finland, Medical Biotechnology, Turku, Finland
| | - Edward W. Odell
- Molecular Oncology, Department of Oral Pathology, King's College London, London, United Kingdom
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6
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Lyons AJ, Jones J. Cell adhesion molecules, the extracellular matrix and oral squamous carcinoma. Int J Oral Maxillofac Surg 2007; 36:671-9. [PMID: 17643963 DOI: 10.1016/j.ijom.2007.04.002] [Citation(s) in RCA: 75] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2006] [Revised: 03/18/2007] [Accepted: 04/18/2007] [Indexed: 10/23/2022]
Abstract
Carcinomas are characterized by invasion of malignant cells into the underlying connective tissue and migration of malignant cells to form metastases at distant sites. These processes require alterations in cell-cell and cell-extracellular matrix interactions. As cell adhesion molecules play a role in cell-cell and cell-extracellular matrix adhesion and interactions they are involved in the process of tumour invasion and metastases. In epithelial tissues, receptors of the integrin family mediate adhesion to the adjacent matrix whereas cadherins largely mediate intercellular adhesion. These and other cell adhesion molecules such as intercellular adhesion molecule-1, CD44, dystroglycans and selectins, are involved and undergo changes in carcinomas, which provide possible targets for anti-cancer drug treatments. In the extracellular matrix that is associated with tumours, laminin 5, oncofetal fibronectin and tenascin C appear. The degree of expression of some of these moieties indicates prognosis in oral cancer and offer targets for antibody-directed radiotherapy. Metalloproteases which degrade the extracellular matrix are increased in carcinomas, and their activity is necessary for tumour angiogenesis and consequent invasion and metastases. Metalloprotease inhibitors have begun to produce decreases in mortality in clinical trials. This report provides a brief overview of our current understanding of cell adhesion molecules, the extracellular matrix, tumour invasion and metastasis.
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Affiliation(s)
- A J Lyons
- Department of Oral & Maxillofacial Surgery, Guy's Hospital, London SE1 9RT, UK
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Neppelberg E, Loro LL, Oijordsbakken G, Johannessen AC. Altered CD40 and E-cadherin expression--putative role in oral lichen planus. J Oral Pathol Med 2007; 36:153-60. [PMID: 17305637 DOI: 10.1111/j.1600-0714.2007.00511.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
BACKGROUND Oral lichen planus (OLP) is characterized among other features by apoptosis of basal keratinocytes. To identify potential regulatory mechanisms associated with basal cell apoptosis in OLP, we investigated the expression of CD40, CD40 ligand (CD40L), CD44 and epithelial (E)-cadherin. METHODS Biopsies from 22 patients with OLP were investigated by immunohistochemistry for detection of CD40, CD40L, E-cadherin, CD44, Laminin-5 and Collagen IV, double-labelling for CD40 and CD3, and in situ mRNA hybridization for CD40 and CD40L. RESULTS In actively diseased areas of OLP lesions, basal keratinocytes did not express CD40 and were focally E-cadherin-negative, in contrast to non-diseased areas and normal oral mucosa. Demonstration of intraepithelial T cells expressing CD40 and CD40L, indicates a potential role in inflammatory cell responses involved in the disease process of OLP. CONCLUSION T cells may orchestrate inflammatory cell responses in OLP via CD40-CD40L interactions. As basal keratinocytes downregulate CD40, they may escape CD40-CD40L-induced apoptosis in OLP. On the other hand, loss of E-cadherin expression may contribute to epithelial basal cell destruction and T-cell migration into the epithelial compartment in OLP.
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Affiliation(s)
- E Neppelberg
- Oral Pathology and Forensic Odontology, Institute of Oral Sciences, Faculty of Dentistry, University of Bergen, Bergen, Norway.
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Rautava J, Soukka T, Inki P, Leimola-Virtanen R, Saloniemi I, Happonen RP, Heikinheimo K. CD44v6 in developing, dysplastic and malignant oral epithelia. Oral Oncol 2003; 39:373-9. [PMID: 12676257 DOI: 10.1016/s1368-8375(02)00140-9] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The CD44v6 adhesion molecule has been linked to progression of various carcinomas, but its role in relation to oral-cancer development is not clear. The study was designed to determine whether CD44v6 levels were clinically significant in oral dysplasias. Twenty-nine oral dysplasias were immunostained with CD44v6 antibody on follow-up. Developing normal epithelia and adult normal epithelia and oral carcinomas were stained for comparison. Oral dysplasias and carcinomas exhibited heterogenous staining patterns. No statistically significant correlation between CD44v6 expression and outcome was found for dysplasia patients. The results show that in developing and healthy oral mucosa CD44v6 is associated with epithelium-specific differentiation but in dysplasias and carcinomas it mirrors disorderly epithelial maturation. The results also suggest that determination of CD44v6 levels is not helpful in judging the likely clinical behaviour of oral dysplasia.
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Affiliation(s)
- Jaana Rautava
- Department of Oral and Maxillofacial Surgery, Institute of Dentistry, University of Turku, Lemminkäisenkatu 2, FIN-20520 Turku, Finland.
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Bánkfalvi A, Krassort M, Buchwalow IB, Végh A, Felszeghy E, Piffkó J. Gains and losses of adhesion molecules (CD44, E-cadherin, and beta-catenin) during oral carcinogenesis and tumour progression. J Pathol 2002; 198:343-51. [PMID: 12375267 DOI: 10.1002/path.1204] [Citation(s) in RCA: 108] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The aim of this study was to define whether or not the impaired expression of CD44, E-cadherin (E-cad), and beta-catenin (beta-cat) correlates with the clinical evolution and prognosis of oral cancer. Ninety-three primary oral squamous cell carcinomas (OSCCs) with tumour-adjacent normal and/or dysplastic mucosa, 30 associated metastases, and 12 recurrences were immunostained for CD44s, -v3, -v4, -v5, -v6, -v7, -v9, E-cad, and beta-cat. In non-neoplastic epithelium, all molecules investigated were constitutively expressed in the basal layers. In the majority of dysplasias, immunoreactivity for all adhesion molecules was increased, but there was restricted loss for CD44s, E-cad, and beta-cat in a few cases. In carcinomas, a striking accumulation of CD44s, v3, v4, v9 and a loss of E-cad/beta-cat were observed at the invasive tumour front. In metastases and recurrences, besides a loss of CD44s, v4, v7, and E-cad, a significant increase of v9 was recorded, whereas CD44v5 and v6 remained unchanged. Clinically, reduced expression of CD44v3, E-cad, and changes of CD44v9 phenotype within the primary tumours correlated significantly with poor prognosis; decreased beta-cat expression was a predictive marker for nodal metastases. These findings indicate that there is some perturbed expression of adhesion molecules during the stepwise course of oral carcinogenesis and tumour progression. Distinct phenotypic alterations project poor prognosis, while others predict metastasis. Some of these restricted molecular changes may serve as potential targets for future antibody-based tumour therapy.
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Affiliation(s)
- Agnes Bánkfalvi
- Domagk-Institute of Pathology, Wilhelms-University, Münster, Germany.
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Sato S, Miyauchi M, Takekoshi T, Zhao M, Kudo Y, Ogawa I, Kitagawa S, Fujita M, Takata T. Reduced expression of CD44 variant 9 is related to lymph node metastasis and poor survival in squamous cell carcinoma of tongue. Oral Oncol 2000; 36:545-9. [PMID: 11036249 DOI: 10.1016/s1368-8375(00)00049-x] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Expression of CD44v9 was immunohistochemically studied in 120 biopsy specimens from primary squamous cell carcinoma (SCC) of the tongue and correlated with clinicopathological findings of the SCCs. The tumors were classified into three groups according to immunostaining pattern of CD44v9; 53 cases with distinct positivity in all cancer cells except for those in the central part of nests (Group 1, non-reduced group), 42 cases with reduced expression in peripheral cells of nests (Group 2, reduced group), and 25 cases with complete disappearance of the expression in one or more nests (Group 3, negative group). Nineteen of 25 (76%) tumors in Group 3 and 14 of 42 (33%) in Group 2 exhibited lymph node metastasis, compared with only 8 of 53 (15%) in Group 1. The average survival time in Groups 1, 2 and 3 was 4496+/-204, 3866+/-379 and 2719+/-359 days, respectively and became shorter with the reduction of CD44v9 expression. These results suggest that the down-regulation of CD44v9 in SCC of the tongue may relate to the detachment of tumor cells from primary lesions, establishment of lymph node metastasis and consequently the death of patients.
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Affiliation(s)
- S Sato
- Department of Oral Pathology, Faculty of Dentistry, Hiroshima University, 1-2-3 Kasumi, Minami-ku, 734-8553, Hiroshima, Japan
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Affiliation(s)
- T A Winning
- Dental School, The University of Adelaide, Adelaide, South Australia, Australia
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Stoll C, Baretton G, Soost F, Terpe HJ, Domide P, Löhrs U. Prognostic importance of the expression of CD44 splice variants in oral squamous cell carcinomas. Oral Oncol 1999; 35:484-9. [PMID: 10694948 DOI: 10.1016/s1368-8375(99)00021-4] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Considering squamous cell carcinomas (SCCs) of the oral cavity and oropharynx the molecular mechanisms underlying the infiltration and destruction of adjacent tissue as well as the metastatic spread are largely unknown. In this context, the detection of defective expression of cellular adhesion molecules in the tumour cells, e.g. CD44, might be important and correlated with prognosis. Paraffin-embedded tumour-tissue from 99 patients with primary oral and oropharyngeal SCC, additionally including corresponding lymph-node metastases in nine cases, was analysed for expression of the CD44 splice variants v4, v5, v6, v7, and v9 by means of immunohistochemistry. A diminution of at least one of the examined CD44 isoforms compared to the normal oral epithelium was observed in 39.4% of the squamous cell carcinomas. No correlations could be found between CD44 expression and pT- or pN-stage. However, decreased expression of v9 was correlated with higher histological grade (p < 0.001). Moreover, reduced CD44 expression was a statistically significant independent predictor for shorter survival time (p = 0.002) as well as shorter recurrence-free interval (p = 0.004) in addition to pT- and pN-stage. The separate analysis showed that particularly the decreased v7 (p = 0.04) and v9 (p < 0.02) expression in the tumour cells was associated negatively with survival.
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Affiliation(s)
- C Stoll
- Department of Oral and Maxillofacial Surgery, Humboldt-University of Berlin, Germany.
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Oliveira DT, Sherriff M, Odell EW. Expression of CD44 variant exons by primary and metastatic oral squamous carcinomas. J Oral Pathol Med 1998; 27:303-7. [PMID: 9725567 DOI: 10.1111/j.1600-0714.1998.tb01961.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Abnormal CD44 expression in many neoplasms correlates with behaviour, but reports on its role in oral squamous carcinoma are contradictory. CD44 expression was characterised in a closely matched series of oral carcinomas with and without metastases in both frozen and formalin-fixed tissue and correlated with behaviour and histological grading parameters. Eleven primary oral squamous carcinomas without metastases and nine primary carcinomas with 19 matched metastases were stained immunocytochemically for CD44H and products of variant exons v3, v4/5, v6 and v9. Patterns of staining in frozen and formalin-fixed tissue were correlated with invasive front grading and behaviour using exact inferential statistics. Most primary carcinomas stained for all exons tested but some showed loss of expression of v4/5. Loss of expression was more marked in metastases, but there was no correlation between expression and behaviour or grade. Stromal surfaces of epithelial cells often expressed variant exon products reflecting loss of polarity. This, together with selective loss of v4 and v5 in primary carcinomas and their more frequent loss in metastases, suggests that CD44 may play a role in metastasis of some oral squamous carcinomas.
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Affiliation(s)
- D T Oliveira
- Dept. Oral Medicine and Pathology, UMDS Guy's Hospital, London, UK
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