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Schreurs O, Balta MG, Karatsaidis A, Schenck K. Composition of hemidesmosomes in basal keratinocytes of normal buccal mucosa and oral lichen planus. Eur J Oral Sci 2020; 128:369-378. [PMID: 32870574 DOI: 10.1111/eos.12732] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/16/2020] [Indexed: 12/21/2022]
Abstract
Oral lichen planus (OLP) is a chronic inflammatory disease displaying ultrastructural disturbances in epithelial hemidesmosomes. The expression of several key hemidesmosomal components in OLP as well as in normal buccal mucosa is, however, unknown. The aim of the study was therefore to examine intracellular and extracellular components involved in hemidesmosomal attachment, in OLP (n = 20) and in normal buccal mucosa (n = 10), by immunofluorescence. In normal buccal mucosa, laminin-α3γ2, integrin-α6β4, CD151, collagen α-1(XVII) chain, and dystonin showed linear expression along the basal membrane, indicating the presence of type I hemidesmosomes. Plectin stained most epithelial cell membranes and remained unphosphorylated at S4642. In OLP, most hemidesmosomal molecules examined showed disturbed expression consisting of discontinuous increases, apicolateral location, and/or intracellular accumulation. Plectin showed S4642-phosphorylation at the basement membrane, and deposits of laminin-α3 and laminin-γ2 were found within the connective tissue. The disturbed expression of hemidesmosomal proteins in OLP indicates deficient attachment of the basal cell layer, which can contribute to detachment and cell death of basal keratinocytes seen in the disease.
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Affiliation(s)
- Olav Schreurs
- Institute of Oral Biology, University of Oslo, Oslo, Norway
| | - Maria G Balta
- Institute of Oral Biology, University of Oslo, Oslo, Norway
| | | | - Karl Schenck
- Institute of Oral Biology, University of Oslo, Oslo, Norway
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Mane DR, Rahman SU, Desai KM, Kale AD, Bhat KG, Arany PR. Roles of the matricellular protein Tenascin-C in T-lymphocyte trafficking and etiopathogenesis of Oral Lichen Planus. Arch Oral Biol 2019; 110:104622. [PMID: 31783297 DOI: 10.1016/j.archoralbio.2019.104622] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2019] [Revised: 11/16/2019] [Accepted: 11/19/2019] [Indexed: 11/19/2022]
Abstract
OBJECTIVE This study was aimed at examining the role of Tenascin-C in T cell trafficking in Oral Lichen Planus (OLP). DESIGN For the in vivo immunohistochemical analyses, 115 OLP samples were collected from patients and immunostaining was performed. The intensity and distribution of TN-C expression were quantified and correlated with histological analyses of basement membrane integrity and presence of inflammatory infiltrate. For the in vitro study, TN-C and collagen were coated on culture plates and migration of T lymphocytes was assessed. RESULTS TN-C immunoexpression was increased in terms of both distribution and intensity along the basement membrane zone. These changes were significantly associated with basement membrane duplication (distribution p < 0.002 and intensity p < 0.001) and bands of inflammation (distribution p < 0.002 and intensity p < 0.001) assessed by Chi-square test. T lymphocytes demonstrated significant migration towards TN-C as compared to collagen (n = 3, p < 0.05). CONCLUSIONS These findings indicate TN-C may have a key role in promoting T cell migration at the epithelial-mesenchymal junction in OLP. These observations suggest TN-C could be a good target for therapeutic intervention, either in itself or synergistically with anti-inflammatory directed strategies in this chronic disease management.
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Affiliation(s)
- Deepa R Mane
- Oral Pathology and Microbiology, KLE's VK Institute of Dental Sciences and Hospital, Belgaum, Karnataka 590010, India
| | - Saeed Ur Rahman
- Oral Biology, School of Dental Medicine, University of Buffalo, New York, 14214, USA
| | - Karishma M Desai
- Oral Pathology and Microbiology, KLE's VK Institute of Dental Sciences and Hospital, Belgaum, Karnataka 590010, India; Oral Biology, School of Dental Medicine, University of Buffalo, New York, 14214, USA
| | - Alka D Kale
- Oral Pathology and Microbiology, KLE's VK Institute of Dental Sciences and Hospital, Belgaum, Karnataka 590010, India
| | - Kishore G Bhat
- Prabhakar Kore Basic Science Research Laboratory, KLE'sUniversity, Belgaum, Karnataka 590010, India
| | - Praveen R Arany
- Oral Pathology and Microbiology, KLE's VK Institute of Dental Sciences and Hospital, Belgaum, Karnataka 590010, India; Oral Biology, School of Dental Medicine, University of Buffalo, New York, 14214, USA.
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Siponen M, Bitu CC, Al-Samadi A, Nieminen P, Salo T. Cathepsin K expression is increased in oral lichen planus. J Oral Pathol Med 2016; 45:758-765. [PMID: 27152719 DOI: 10.1111/jop.12446] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/16/2016] [Indexed: 01/06/2023]
Abstract
BACKGROUND Oral lichen planus (OLP) is an idiopathic T-cell-mediated mucosal inflammatory disease. Cathepsin K (Cat K) is one of the lysosomal cysteine proteases. It is involved in many pathological conditions, including osteoporosis and cancer. The expression and role of Cat K in OLP are unknown. METHODS Twenty-five oral mucosal specimens diagnosed histopathologically as OLP and fourteen healthy controls (HC) were used to study the immunohistochemical (IHC) expression of Cat K. Colocalization of Cat K with CD1a, Melan-A, CD68, CD45, mast cell tryptase (MCT), and Toll-like receptors (TLRs) 4 and 9 were studied using double IHC and/or immunofluorescence (IF) staining. Expression of Cat K was also evaluated in OLP tissue samples before and after topical tacrolimus treatment. RESULTS Cat K was expressed in a higher percentage of cells in the epithelial zone, and the staining intensity was stronger in the stroma in OLP compared to controls (P < 0.001). In OLP, Cat K was present mostly in melanocytes and macrophages and sporadically in basal keratinocytes, endothelial cells, and extracellularly. Cat K was found also in some fibroblasts in HC and OLP samples. Coexpression of Cat K and TLRs 4 and 9 was seen in some dendritic cells (presumably melanocytes) and macrophages. In OLP, tacrolimus treatment reduced the expression of Cat K in the epithelium but increased it in the stroma. CONCLUSIONS These results suggest that Cat K is involved in the pathogenesis of OLP. Cat K possibly takes part in the modulation of matrix molecules and cellular receptors.
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Affiliation(s)
- Maria Siponen
- Cancer and Translational Medicine Research Unit, University of Oulu, Oulu, Finland. , .,Department of Oral and Maxillofacial Diseases, Kuopio University Hospital, Kuopio, Finland. ,
| | | | - Ahmed Al-Samadi
- Department of Oral and Maxillofacial Diseases, University of Helsinki, Helsinki, Finland
| | - Pentti Nieminen
- Medical Informatics and Statistics Research Group, University of Oulu, Oulu, Finland
| | - Tuula Salo
- Cancer and Translational Medicine Research Unit, University of Oulu, Oulu, Finland.,Department of Oral and Maxillofacial Diseases, University of Helsinki, Helsinki, Finland.,Medical Research Center, Oulu University Hospital, Oulu, Finland.,HUSLAB, Department of Pathology, Helsinki University Central Hospital, University of Helsinki, Helsinki, Finland
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Villarroel Dorrego M, Correnti M, Delgado R, Tapia FJ. Oral lichen planus: immunohistology of mucosal lesions. J Oral Pathol Med 2002; 31:410-4. [PMID: 12165059 DOI: 10.1034/j.1600-0714.2002.00097.x] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
BACKGROUND Current evidence suggests that immunological mechanisms are involved in oral lichen planus (OLP) pathogenesis. The events implicate activated epithelia that comprise antigen-presenting Langerhans cells, immunocompetent keratinocytes and subepithelial inflammatory infiltrate. Also, the presence of a high density of leucocyte cells may occur for the expression of a variety of adhesion molecules. The aim of this study was to analyse the immunoexpression of some adhesion molecules as well as lymphocytic markers in order to determine the disease pathogenesis in a Venezuelan population. METHODS The 18 OLP and 10 normal oral mucosa biopsies were immunostained for CD4, CD8, CD1a, LFA-1, VCAM-1 and ICAM-1. RESULTS The results showed an increased number of CD4+, CD8+, CD1a+ cells in OLP. Serial sections showed CD4+ and CD8+ cells also expressed LFA-1. The expression of ICAM-1 and VCAM-1 were significantly higher in OLP. CONCLUSIONS The immunological reaction begins with Langerhans cells activation, which presents an antigen to CD4+ lymphocytes. Those cells through ICAM-1 and LFA-1 promote epithelial destruction. Afterwards, cytokine production, ICAM-1 and VCAM-1 expression can activate CD8+ lymphocytes leading to the chronic form of the disease.
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Affiliation(s)
- Mariana Villarroel Dorrego
- Instituto de Investigaciones Odontológicas Raúl Vincentelli, Universidad Central de Venezuela, Caracas, Venezuela.
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Zhou XJ, Sugerman PB, Savage NW, Walsh LJ. Matrix metalloproteinases and their inhibitors in oral lichen planus. J Cutan Pathol 2001; 28:72-82. [PMID: 11168755 DOI: 10.1034/j.1600-0560.2001.280203.x] [Citation(s) in RCA: 66] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
BACKGROUND Oral lichen planus (OLP) is characterized by a sub-epithelial lymphocytic infiltrate, basement membrane (BM) disruption, intra-epithelial T-cell migration and apoptosis of basal keratinocytes. BM damage and T-cell migration in OLP may be mediated by matrix metalloproteinases (MMPs). METHODS We examined the distribution, activation and cellular sources of MMPs and their inhibitors (TIMPs) in OLP using immunohistochemistry, ELISA, RT-PCR and zymography. RESULTS MMP-2 and -3 were present in the epithelium while MMP-9 was associated with the inflammatory infiltrate. MMP-9 and TIMP-1 secretion by OLP lesional T cells was greater than OLP patient (p < 0.01) and healthy control subject (p < 0.001) peripheral blood T cells. MMP-9 and TIMP-1 mRNA levels were greater in OLP lesional T cells compared with healthy control subject peripheral blood T cells p < 0.01). Tumor necrosis factor (TNF)-alpha upregulated OLP lesional T-cell MMP-9 (not TIMP-1) mRNA and secretion (p < 0.05). The in vitro activation rate of MMP-9 from OLP lesional T cells was greater than that from OLP peripheral blood T cells (p < 0.05). CONCLUSION T-cell-derived MMP-9 may be involved in the pathogenesis of OLP. Relative over-expression of MMP-9 (compared with TIMP-1) may cause BM disruption and facilitate intra-epithelial T-cell migration in OLP.
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Affiliation(s)
- X J Zhou
- Oral Biology and Pathology, School of Dentistry, The University of Queensland, Brisbane, Australia
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Häkkinen L, Kainulainen T, Salo T, Grenman R, Larjava H. Expression of integrin alpha9 subunit and tenascin in oral leukoplakia, lichen planus, and squamous cell carcinoma. Oral Dis 1999; 5:210-7. [PMID: 10483066 DOI: 10.1111/j.1601-0825.1999.tb00303.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
OBJECTIVES Integrin alpha9 subunit is a member of beta1 integrin family and binds tenascin (TN). It is expressed by stratified squamous epithelium and may be associated with cell differentiation and growth. We studied if the expression of alpha9 integrin and TN is altered in leukoplakia, lichen planus, and squamous cell carcinoma (SCC). METHODS Frozen sections of tissue samples obtained from normal human keratinized (16 subjects) and non-keratinized (three subjects) oral mucosa, oral leukopakias with dysplasia (19 subjects), reticular type lichen planus (nine subjects), or oral mucosal SCC (23 subjects) were stained immunohistochemically with antibodies against alpha9 integrin and TN. RESULTS In contrast to its most prominent localization at the cell membranes of the basal epithelial cells in the normal mucosa, alpha9 integrin was localized in a more diffuse pattern with focal loss of expression at the epithelial cell membranes in leukoplakic dysplasia, lichen planus, and SCC. In some areas of SCC, alpha9 integrin localized throughout all cell layers of the tumor epithelium. In most areas, alpha9 integrin colocalized with TN but in heavily inflamed areas there was focal loss of TN and alpha9 integrin at the basement membrane zone. CONCLUSIONS The findings show that alpha9 integrin expression is altered in leukoplakic dysplasia, lichen planus, and SCC.
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Affiliation(s)
- L Häkkinen
- University of British Columbia, Faculty of Dentistry, Department of Oral Biological and Medical Sciences, Vancouver, B.C., Canada
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Garzino-Demo P, Carrozzo M, Trusolino L, Savoia P, Gandolfo S, Marchisio PC. Altered expression of alpha 6 integrin subunit in oral squamous cell carcinoma and oral potentially malignant lesions. Oral Oncol 1998; 34:204-10. [PMID: 9692055 DOI: 10.1016/s1368-8375(97)00059-6] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The expression and distribution of integrin chains alpha 2, alpha 3, alpha 5, alpha 6, beta 1, beta 4, collagen type IV, laminin 1 and laminin 5 in oral squamous cell carcinoma (SCC) and oral keratoses with and without dysplasia (OL) have been studied by immunochemistry and western blotting. Focal interruptions of basement membrane protein staining were detected in SCC indicating a loss of continuity, whereas tumour nests were apparently completely surrounded by laminin 1, type IV collagen and laminin 5; the loss of basement membrane components in OL was found in only one specimen showing severe dysplasia. The localisation of integrins showed altered suprabasal and pericellular expression of the alpha 6 chain in all but one SCC, as well as in many OL samples, whereas the beta 4 subunit showed only a faint pericellular redistribution in SCC. In OL, beta 4 was often seen in a normal basally polarised distribution. Western blotting analysis confirmed that alpha 6 protein levels were abnormally high in cancerous lesions, whereas quantitative recovery of the beta 4 subunit in SCC was only minimal, suggesting a dissociation in the synthetic ratios of the two chains of the alpha 6 beta 4 heterodimer in SCC. Because alterations in the polarised expression of integrin alpha 6 beta 4 have been seen during epithelial tumour progression and wound healing, we suggest that the lack of restricted basal polarisation of alpha 6 could be an early but non-specific marker of oral malignancy, indicating that the generation of abnormal signals from the extracellular matrix may be involved.
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Affiliation(s)
- P Garzino-Demo
- Department of Oral Medicine and Periodontology, University of Torino, Italy
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Scully C, Beyli M, Ferreiro MC, Ficarra G, Gill Y, Griffiths M, Holmstrup P, Mutlu S, Porter S, Wray D. Update on oral lichen planus: etiopathogenesis and management. CRITICAL REVIEWS IN ORAL BIOLOGY AND MEDICINE : AN OFFICIAL PUBLICATION OF THE AMERICAN ASSOCIATION OF ORAL BIOLOGISTS 1998; 9:86-122. [PMID: 9488249 DOI: 10.1177/10454411980090010501] [Citation(s) in RCA: 309] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Lichen planus (LP) is a relatively common disorder of the stratified squamous epithelia, which is, in many ways, an enigma. This paper is the consensus outcome of a workshop held in Switzerland in 1995, involving a selection of clinicians and scientists with an interest in the condition and its management. The oral (OLP) eruptions usually have a distinct clinical morphology and characteristic distribution, but OLP may also present a confusing array of patterns and forms, and other disorders may clinically simulate OLP. Lesions may affect other mucosae and/or skin. Lichen planus is probably of multifactorial origin, sometimes induced by drugs or dental materials, often idiopathic, and with an immunopathogenesis involving T-cells in particular. The etiopathogenesis appears to be complex, with interactions between and among genetic, environmental, and lifestyle factors, but much has now been clarified about the mechanisms involved, and interesting new associations, such as with liver disease, have emerged. The management of lichen planus is still not totally satisfactory, and there is as yet no definitive treatment, but there have been advances in the control of the condition. There is no curative treatment available; immunomodulation, however, can control the condition. Based on the observed increased risk of malignant development, OLP patients should be offered regular follow-up examination from two to four times annually and asked to report any changes in their lesions and/or symptoms. Follow-up may be particularly important in patients with atrophic/ulcerative/erosive affections of the tongue, the gingiva, or the buccal mucosa. Much more research is required into the genetic and environmental aspects of lichen planus, into the premalignant potential, and into the possible associations with chronic liver, and other disorders. More clinical studies are required into the possible efficacy of immunomodulatory drugs such as pentoxifylline and thalidomide.
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Affiliation(s)
- C Scully
- Eastman Dental Institute for Oral Health Care Sciences, University of London, United Kingdom
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Eversole LR. Immunopathogenesis of oral lichen planus and recurrent aphthous stomatitis. SEMINARS IN CUTANEOUS MEDICINE AND SURGERY 1997; 16:284-94. [PMID: 9421220 DOI: 10.1016/s1085-5629(97)80018-1] [Citation(s) in RCA: 66] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Oral mucosal bullous/desquamative/ulcerative diseases involve immunopathological mechanisms that account for loss of adhesion between contiguous keratinocytes or to structures within the basal lamina. Some are antibody mediated, in which specific adhesion molecules of the desmosome, hemidesmosome, and basement membrane become antigenic targets. Oral lichen planus and recurrent apthous ulcers, although manifesting disparate clinical appearances and natural history, share immunopathological features that involve T cell-mediated immunity. Although the antigens, haptens, or autoantigens are not usually apparent, current research poses the hypothesis that both of these common oral mucosal diseases are a delayed-type hypersensitivity or cell-mediated response to an antigenic stimulus residing within the epithelium. This article reviews the research evidence for this hypothesis.
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Affiliation(s)
- L R Eversole
- UCLA School of Dentistry, Los Angeles, CA 90095, USA
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Vesper M, Riethdorf S, Christoph E, Ruthke A, Schmelzle R, Löning T. [Detection of human papillomavirus (HVP)-DNA in oral manifestation of lichen planus]. MUND-, KIEFER- UND GESICHTSCHIRURGIE : MKG 1997; 1:146-9. [PMID: 9410622 DOI: 10.1007/bf03043534] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Human papilloma viruses (HPV) can be detected in different epithelia with the help of the polymerase chain reaction (PCR). The role of HPV in the development of anogenital cancers has been intensively studied, and current evidence shows that most cervical cancers are associated with so-called high risk HPV types (e.g. HPV 16 and 18). HPV-infections can also be demonstrated in oral premalignant lesions and squamous cell carcinomas. Depending on the sensitivity of the detection method, 40-67% of leukoplakias, 2.5-76% of squamous cell carcinomas and 0-87% of cases of lichen planus were described to be infected with HPV 16 or 18. Whether lichen planus can be considered as a premalignant lesion is still controversial. By the use of PCR and hybridization we found infections with the high risk HPV types 16, 18 and 31 in 42% (3/7) of the patients with lichen planus. Further investigations with a higher numbers of cases in combination with the analysis of the viral gene expression as well as the clinical and histological control of the corresponding regions are necessary. The aim of these studies is to find out the prognostic value of the HPV infection for this facultative premalignant disease.
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Affiliation(s)
- M Vesper
- Abteilung für Mund-, Kiefer- und Gesichtschirurgie, Universitätskrankenhaus Eppendorf
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Dekker NP, Lozada-Nur F, Lagenaur LA, MacPhail LA, Bloom CY, Regezi JA. Apoptosis-associated markers in oral lichen planus. J Oral Pathol Med 1997; 26:170-5. [PMID: 9176791 DOI: 10.1111/j.1600-0714.1997.tb00453.x] [Citation(s) in RCA: 79] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Hypothesizing that loss of basal cells in oral lichen planus is due to apoptosis, we evaluated LP specimens for apoptosis-regulating proteins [positive regulators Bcl-xS, Bax, Fas/Fas-ligand, p53, and negative regulators (anti-apoptotic) Bcl-2, Bcl-xL and compared results with reactions in normal mucosa and chronically inflamed gingiva. Also, sections were evaluated with an in situ TUNEL assay that identifies apoptotic DNA fragments. Basal keratinocytes in normal buccal mucosa, nonspecific gingivitis, and LP were negative for Bcl-2 protein, but melanocytes and lymphoid cells were positive. Keratinocyte staining for Bcl-x was negative to weak in normal buccal mucosa and gingivitis, and moderate in LP. Keratinocytes (especially upper prickle cells) in all tissues stained similarly for Bax at weak to moderate levels. Also, no differences in Fas and Fas-ligand staining were evident. Prominent p53-positive staining was seen in all LP biopsies (10-100% of basal keratinocytes) but not in normal buccal mucosa and gingivitis. Few basal keratinocytes in 5/10 LP cases exhibited a positive in situ signal for DNA fragment-associated apoptosis. That the Bcl-2 family of proteins and Fas/Fas-ligand were detected in normal and diseased tissues, and were occasionally expressed differently in oral LP, supports the notion that apoptosis is a potential mechanism of keratinocyte loss, especially in LP. The pattern of p53 staining in oral LP suggests over-expression of wild-type protein; a phenomenon that would arrest the cell cycle to allow repair of damaged DNA, or trigger apoptosis. While immunohistochemical evidence for apoptosis-associated basal keratinocyte death in LP was slight, it appeared that it may be p53 protein, and possibly Bcl-x associated.
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Affiliation(s)
- N P Dekker
- Department of Stomatology, School of Dentistry, University of California, San Francisco, USA
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Ramirez-Amador V, Dekker NP, Lozada-Nur F, Mirowski GW, MacPhail LA, Regezi JA. Altered interface adhesion molecules in oral lichen planus. Oral Dis 1996; 2:188-92. [PMID: 9081757 DOI: 10.1111/j.1601-0825.1996.tb00222.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: 02/04/2023]
Abstract
OBJECTIVE To evaluate expression of key epithelial-connective tissue interface adhesion molecules (basal keratinocyte integrins and extracellular matrix receptors) in oral lichen planus (LP). DESIGN Integrins alpha 3, alpha 6, beta 1, beta 4 and basement membrane proteins laminin 1, laminin 5, collagen IV, and collagen VII were immunohistochemically identified in frozen biopsy specimens (14 oral LP and II matched controls) using a standard avidin-biotin-peroxidase technique. RESULTS An increased staining intensity of all antigens in LP was shown, as compared to controls. Integrin expression by LP keratinocytes was generally more intense and appeared on more upper level cells. Staining for basement membrane-associated extracellular matrix proteins was also generally more intense, although fragmentation and gaps were typically seen. Reactions for alpha 6, beta 4, laminin 5, and collagen VII stains were particularly intense along the basement membrane. In LP, strands of laminin 5, collagen IV, and collagen VII appeared in the submucosa approximating or duplicating the basement membrane. CONCLUSIONS The apparent increased expression of the interface-associated adhesion molecules may be reflective of a keratinocyte compensatory response (due to lymphocyte-mediated damage) that would functionally help resist epithelial separation (ulceration). Expression of alpha 3 beta 1 and alpha 6 beta 4 would also assist in epithelial migration associated with wound repair. We interpret the submucosal extensions and deposits of basement membrane proteins as representing remnants of basement membrane, indicating recent remodeling or atrophy of epithelial rete ridges.
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Affiliation(s)
- V Ramirez-Amador
- Department of Health Care, Universidad Autonoma Metropolitan-Xochimilco, Mexico City
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Affiliation(s)
- L R Eversole
- Diagnostic Sciences and Orofacial Pain, UCLA, School of Dentistry 90095, USA
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Li J, Mahiouz DL, Farthing PM, Haskard DO, Thornhill MH. Heterogeneity of ICAM-1 expression, and cytokine regulation of ICAM-1 expression, in skin and oral keratinocytes. J Oral Pathol Med 1996; 25:112-8. [PMID: 9148037 DOI: 10.1111/j.1600-0714.1996.tb00204.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Differences in expression of intercellular adhesion molecule-1 (ICAM-1) and ICAM-1 mRNA levels were studied in cultured skin and oral keratinocytes before and after stimulation with different pro-inflammatory cytokines. Basal expression of ICAM-1 was undetectable on skin keratinocytes but oral keratinocytes expressed ICAM-1 at high levels. Interferon-gamma (IFN-gamma) and tumor necrosis factor-alpha (TNF-alpha) increased ICAM-1 expression on both cell types, although TNF-alpha had a greater effect on oral than skin keratinocytes (P<0.05) and IFN-gamma was more effective than TNF-alpha on both cell types (P<0.01). In combination, TNF-alpha and IFN-gamma synergistically increased ICAM-1 expression on skin keratinocytes only, although ICAM-1 mRNA was synergistically increased in both cell types. IL-1alpha and IL-1beta induced a small increase in ICAM-1 expression on oral keratinocytes but had no effect on skin keratinocytes.
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Affiliation(s)
- J Li
- The Clinical Academic Group of Oral Medicine and Dental Diagnostic Science, University of Manchester School of Dental Science, Manchester, England
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