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Dorfer S, Kancz S, Birner P, Strasser K, Kirnbauer R, Petzelbauer P, Radakovic S, Harpain L, Pehamberger H, Thalhammer F, Handisurya A. High-risk Mucosal Human Papillomavirus Infection in Squamous Cell Carcinoma and Bowen's Disease of the Hand. Acta Derm Venereol 2019; 99:462-463. [PMID: 30653652 DOI: 10.2340/00015555-3115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Affiliation(s)
- Sonja Dorfer
- Department of Dermatology, Medical University of Vienna , Vienna, Austria
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Ishida M, Iwai M, Yoshida K, Kagotani A, Okabe H. Sebaceous carcinoma associated with Bowen's disease: a case report with emphasis on the pathogenesis of sebaceous carcinoma. Int J Clin Exp Pathol 2013; 6:3029-3032. [PMID: 24294397 PMCID: PMC3843291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Received: 10/09/2013] [Accepted: 10/25/2013] [Indexed: 06/02/2023]
Affiliation(s)
- Mitsuaki Ishida
- Department of Clinical Laboratory Medicine and Division of Diagnostic Pathology, Shiga University of Medical Science Shiga, Japan
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Karashima T, Hashikawa K, Ono F, Eguchi H, Hamada T, Ishii N, Dainichi T, Yasumoto S, Tsuruta D, Hashimoto T. Successful treatment of Bowen's disease with topical maxacalcitol. Acta Derm Venereol 2012; 92:660-1. [PMID: 22281814 DOI: 10.2340/00015555-1294] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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El Fekih N, Hawiloo A, Remmah S, Zermani R, Fazaa B. Pigmented lesion in the inguinal region. Dermatol Online J 2011; 17:12. [PMID: 22136868] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023] Open
Abstract
Pigmented Bowen disease (PBD) is a rare tumor characterized by increased melanin pigment in the epidermis or papillary dermis in addition to the typical findings of Bowen disease. We report the case of a 60-year-old woman who presented with a 6-month history of a gradually enlarging solitary dark brown plaque in her right inguinal region. Histopathology showed hyperkeratosis with parakeratosis, acanthosis, disorganization of epidermal architecture, atypical keratinocytes, and increased melanin pigment of the papillary dermis. Considering the clinical and the histological evidence, a diagnosis of PBD was established. Complete resection confirmed the diagnosis. Pigmented Bowen disease is an unusual form of squamous carcinoma in situ. Other tumors in the differential diagnosis include pigmented basal cell carcinoma and superficial spreading melanoma.
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Abstract
Topical imiquimod (IQ) is an effective treatment for genital warts and various malignant tumors of the skin. IQ acts through the Toll-like receptor 7 leading to the production of cytokines and chemokines such as interferons, interleukins, and growth factors. We investigated the composition of the inflammatory cell infiltrate before, during, and after the treatment of 10 superficial cutaneous malignancies (melanoma in situ (n = 4), melanoma metastasis (n = 1), squamous cell carcinoma in situ (n = 4), and basal cell carcinoma (n = 1) with 5% IQ cream. Immunophenotyping revealed in all cases during treatment an increased population of T-lymphocytes positive for CD3, CD4 and CD8, as well as a considerable number of cytotoxic cells (TIA-1+, granzyme B+) and plasmacytoid dendritic cells (CD 123+). These findings further support previous investigations that the antitumor effects of IQ result from an enhanced cytotoxic T-cell mediated immune response and from the recruitment of plasmacytoid dendritic cells to the skin. The population of infiltrative inflammatory cells was similar in all patients irrespective of the type of tumor.
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Affiliation(s)
- Ingrid H Wolf
- Department of Dermatology, Medical University of Graz, Graz, Austria
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Abstract
BACKGROUND Among intraepidermal malignancies of epithelial origin, Bowen's disease, bowenoid actinic keratosis (BAK), intraepidermal malignant eccrine poroma (MEP), and Paget's disease may pose diagnostic difficulties. METHODS Histologic features and immunohistochemical profiles of 24 cases of Bowen's disease, 21 cases of BAK, 18 cases of intraepidermal MEP, and 11 cases of Paget's disease were analyzed. RESULTS Using multivariate logistic regression test, multinuclear giant cells and solar degeneration were found to be the only histologic parameters of diagnostic help. On the other hand, a widespread positive reaction for CK 5/8, CK 7, CK 19, and negative reaction for CK 10, was a helpful feature in the differentiation of Paget's disease from Bowen's disease and BAK. The widespread and strong expression of CK 10 was seen in almost all cases of Bowen's disease in contrast to BAK. The widespread expression of CK 5/8 and CK 7, and negative reaction for CK 10, was in favor of Paget's disease, compared to intraepidermal MEP. On the other hand, widespread expression of CK 19 was a common finding in intraepidermal MEP, in contrast to Bowen's disease. CONCLUSION An immunohistochemical panel may provide significant hints on the differentiation of common intraepidermal malignancies, especially in problematic cases.
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MESH Headings
- Bowen's Disease/chemistry
- Bowen's Disease/diagnosis
- Bowen's Disease/pathology
- Diagnosis, Differential
- Humans
- Keratins/analysis
- Keratosis/diagnosis
- Keratosis/pathology
- Neoplasms, Glandular and Epithelial/chemistry
- Neoplasms, Glandular and Epithelial/diagnosis
- Neoplasms, Glandular and Epithelial/pathology
- Paget Disease, Extramammary/chemistry
- Paget Disease, Extramammary/diagnosis
- Paget Disease, Extramammary/pathology
- Paget's Disease, Mammary/chemistry
- Paget's Disease, Mammary/diagnosis
- Paget's Disease, Mammary/pathology
- Regression Analysis
- Skin Neoplasms/chemistry
- Skin Neoplasms/diagnosis
- Skin Neoplasms/pathology
- Sweat Gland Neoplasms/chemistry
- Sweat Gland Neoplasms/diagnosis
- Sweat Gland Neoplasms/pathology
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Affiliation(s)
- Figen Aslan
- Department of Pathology, Cerrahpasa Medical Faculty, University of Istanbul, Cerrahpasa, Istanbul, Turkey.
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Abstract
BACKGROUND The epidermis, which is a typical stratified epithelium, has tight junctions (TJs) in the granular layer, as do simple epithelia. So far, abnormalities of TJs and involvement of claudin-1 have been reported in tumours of simple epithelia. OBJECTIVES To examine the expression of TJ-associated proteins (occludin, ZO-1, claudin-1 and claudin-4) in normal human epidermis and in malignant disorders of keratinization. METHODS Expression of the proteins in normal human epidermis, five cases of squamous cell carcinoma (SCC) of the skin and five cases of Bowen's disease (BD) was examined by immunofluorescence staining. RESULTS In normal human epidermis, occludin, ZO-1 and claudin-4 were expressed at the cell-cell borders in the granular layer specifically or dominantly, whereas claudin-1 was expressed in the whole epithelium. In SCC, occludin, ZO-1, claudin-1 and claudin-4 were strongly expressed in tumour cells with keratinization such as cancer pearls. Claudin-1 was heterogeneously expressed in unkeratinized tumour cells, whereas expression of occludin, ZO-1 and claudin-4 was decreased or absent. In BD, aberrant expression of occludin, ZO-1, claudin-1 and claudin-4 was observed at the cell-cell borders in addition to their expression patterns observed in normal epidermis. CONCLUSIONS Expression of occludin, ZO-1 and claudin-4 is associated with keratinization in SCC and BD. However, the heterogeneous expression of claudin-1 in SCC is not determined only by keratinization.
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Affiliation(s)
- K Morita
- Department of Dermatology, Graduate School of Medicine, Kyoto University, Shogoinkawaharacho, Sakyo-ku, Kyoto 606-8507, Japan.
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8
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Mihailovici MS, Teleman S, Ungureanu C. [The prognostic molecular factors in precancerous lesions and nonmelanotic skin carcinoma]. Rev Med Chir Soc Med Nat Iasi 2003; 107:494-501. [PMID: 14756051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/28/2023]
Abstract
The most common cutaneous carcinoma, which includes basal cell carcinoma (BCC) and squamous cell carcinomas (SCC), accounts for approximately 90% or more of all skin malignancies. Actinic keratosis, bowenoid type of actinic keratosis, Bowen's disease or SCC in situ have been considered precursors of skin SCC. Authors present the histopathological criteria of precursors of skin SCC, variants invasive SCC and BCC. Also, one discusses about the roles of immunohistochemical staining of gene products in evidence of molecular changes in cell that might occur according to the transformation from precancerous lesions to SCC.
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Affiliation(s)
- Maria Sultana Mihailovici
- Facultatea de Medicină Disciplina de Morfopatologie, Universitatea de Medicină şi Farmacie Gr.T. Popa Iaşi
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Abstract
BACKGROUND Cyclooxygenase (COX), also known as prostaglandin endoperoxide synthase, catalyses the conversion of arachidonic acid to prostanoids. There are two different isoforms of COX, referred to as COX-1 and COX-2. Overexpression of COX-2 has been demonstrated in various neoplasms, such as experimentally promoted tumors, gastrointestinal cancers and breast tumors. METHODS In this study, we used immunohistochemistry to investigate COX-2 expression in a series of basal cell epitheliomas (BCE), Bowen's disease, squamous cell carcinomas (SCC) and metastatic tumors of the skin. RESULTS Four of 16 BCE showed a positive reaction for COX-2 and the adenoid type of BCE was the most strongly positive. In Bowen's disease, the extent of positive staining for COX-2 was even higher than that in BCE. Eleven of 15 SCC showed a positive reaction for COX-2 and the pattern of staining was heterogeneous with more intense staining in the center of the tumor nests. In metastatic tumors, the percentage of COX-2-positive tumor cells and the intensity of their staining was low compared with Bowen's disease and SCC. CONCLUSIONS These results indicate that the intensity of COX-2 staining and its heterogeneous distribution are related to the degree of cellular differentiation and the various phenotypes of tumor cells, but the extent of COX-2 staining did not correlate with the degree of malignancy.
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Affiliation(s)
- M Kagoura
- Department of Dermatology, Faculty of Medicine, Toyama Medical and Pharmaceutical University, Toyama, Japan.
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Daley T, Birek C, Wysocki GP. Oral bowenoid lesions: differential diagnosis and pathogenetic insights. Oral Surg Oral Med Oral Pathol Oral Radiol Endod 2000; 90:466-73. [PMID: 11027384 DOI: 10.1067/moe.2000.107975] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
OBJECTIVE To determine if oral lesions exhibiting bowenoid features reflect the diverse microscopic appearance and biologic behaviour of Bowen's disease and bowenoid papulosis of the skin and genitalia. STUDY DESIGN Seven cases of oral bowenoid lesions (6 with follow-up data) were assessed for differences in histologic features, human papillomavirus (HPV) viral status, and selected immunohistochemically detectable cell cycling proteins (p53, WAF-1, Cyclin D1, Bcl-2) and were correlated with available follow-up data. RESULTS Two histologic subsets were identified. One, which was believed to correspond to Bowen's disease, exhibited large numbers of transepithelial apoptotic bodies, dyskeratotic cells and mitoses (bowenoid elements), poor differentiation of background epithelial cells, and consistent HPV-16/18 positivity. The other, believed to correspond to bowenoid papulosis, exhibited few bowenoid elements, good background differentiation, and inconsistent HPV-16/18 positivity. One of the aggressive cases exhibited repeated recurrences despite apparent total clinical excision, whereas none of the other group recurred. CONCLUSION Although a small number of cases are in this study, results suggest that oral bowenoid lesions may exhibit histopathologic and behavioral variations ranging from oral Bowen's disease to oral bowenoid papulosis. Studies on more cases are needed to confirm this initial impression.
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Affiliation(s)
- T Daley
- Department of Pathology, University of Western Ontario, London, Canada.
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Abstract
Bowen disease is a variant of squamous cell carcinoma in situ. In some cases a pagetoid growth pattern can be observed with cytologically atypical clear cells arranged singly and in nests. The differential diagnosis of pagetoid Bowen disease includes primarily Paget disease and malignant melanoma in situ, as well as other less common entities. Two cases of pagetoid Bowen disease are described, one in a 65-year-old man with a thigh lesion and the other in a 25-year-old man with a lesion in the penile/scrotal region. Neither patient had clinical evidence of an internal malignant neoplasm. In both cases, the neoplastic cells were positive for cytokeratin (CK) 7 and CK 19 and were negative for CK 18, CK 20, carcinoembryonic antigen, GCDFP-15, c-erbB2, S100, and HMB-45. In aggregate, these findings support the diagnosis of pagetoid Bowen disease. Previously, others have shown that CK 7 is an almost invariable marker of Paget disease. Thus, we report these two cases to illustrate that CK 7 can be expressed by pagetoid Bowen disease and should not be a cause of confusion in the differential diagnosis.
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Affiliation(s)
- J D Williamson
- Department of Anatomic Pathology, University of Texas M. D. Anderson Cancer Center, Houston, TX, USA
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Murakami M, Hashimoto Y, Tsukinoki K, Matsunaga K, Mizoguchi Y, Horibe Y, Tashiro K, Watanabe Y, Kasahara M. Histopathological assessment of localized proliferation in cases of Bowen's disease using immunostaining and a laser cytometer. Arch Dermatol Res 1998; 290:435-40. [PMID: 9763306 DOI: 10.1007/s004030050332] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In order to evaluate the localized proliferative activity of intratumor cells in Bowen's disease using tissue sections, skin specimens from ten patients were compared with skin samples from seven normal individuals for their expression of proliferating cell nuclear antigen (PCNA), Ki-67 immunostaining and intranuclear DNA contents, quantitated with a laser cytometer (LCM). In normal epidermis, the largest proportion of PCNA- and Ki-67-positive cells was observed in the basal cell layer, with the amounts decreasing through the suprabasal cell layer towards the prickle cell layer. Examination by LCM also revealed the highest average fluorescence intensity of individual nuclei in the basal cell layer and, as with the immunohistological parameters, reducing towards the upper layer of the epidermis. In the Bowen's disease tissue sections, the largest proportion of PCNA- and Ki-67-positive cells was found in contact with the basement membrane (base of the tumor), with lower amounts in the center of the tumor nest and in the marginal epidermis. The average fluorescence intensities of individual nuclei were in line with these results. These results show that tumor cells distributed in Bowen's disease tumor nests have different proliferative activities depending on their location.
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Affiliation(s)
- M Murakami
- Department of Pathology, Fujita Health University, School of Medicine, Toyoake, Aichi, Japan.
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Abstract
In normal skin, proliferation and differentiation are tightly coupled in order to maintain normal architecture in a continually renewing tissue. The temporal and spatial relationships between these two processes in normal, psoriatic, pre-neoplastic and neoplastic skin were investigated by a double immunolabelling technique with Ki67 as a marker of proliferation and involucrin as a marker of terminal differentiation. In normal skin, expression of the two antigens was strictly spatially segregated. In the abnormal, the proportions of cells expressing the antigens were increased with some loss of the spatial segregation, while small numbers of cells showed dual expression suggesting loss of the normal control between proliferation and differentiation. However, the quantitative ratio of proliferation to differentiation in psoriatic and pre-neoplastic skin was similar to the normal; transition to an invasive phenotype, however, was associated with a reversal of this ratio, and this correlated well with the degree of histological differentiation.
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Affiliation(s)
- C J Caldwell
- Department of Histopathology, St Bartholomew's Hospital, West Smithfield, London, UK
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Abstract
Twenty cases of solar keratosis and 15 cases of Bowen's disease were investigated for the expression of transforming growth factor alpha (TGF-alpha) by an indirect immunoperoxidase technique using monoclonal antibody TGF-alpha AB-2 in formalin-fixed wax-embedded tissue. Twelve cases (60%) of solar keratosis and 13 cases (86%) of Bowen's disease showed marked overexpression of TGF-alpha in both membranous and cytoplasmic distributions. This suggests that overexpression of TGF-alpha may play an important role in the evolution of these two neoplastic conditions.
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Affiliation(s)
- J J Grant
- Army Histology Registry, Royal Army Medical College, Millbank, London, UK
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Abstract
Bowen's disease is a premalignant dermatosis comprised of a clonal proliferation of atypical keratinocytes in the full thickness of the epidermis. To elucidate the relationship between the alteration of the p53 tumor suppressor protein and cell proliferation rate, we immunohistochemically examined the expression of proliferating cell nuclear antigen (PCNA) and p53 protein in 30 cases of Bowen's disease. All the cases exhibited the full-thickness distribution of PCNA-positive cycling cells in the lesional epidermis. Quantitation of PCNA staining by image cytometry revealed a mean labeling index (LI) of 75.1 +/- 20.3. p53 expression was detected in 13 cases (43%). Expression was diffuse (p53 LI > 50) in 9 cases, but focal (p53 LI < 30) in the other four. The mean PCNA LI of p53 diffusely positive cases was significantly greater than that of both p53 focally positive and p53 negative cases (89.3 +/- 10.1 vs 62.7 +/- 21.2, and 70.5 +/- 21.6; p < 0.01, respectively). These findings suggest that a high-level accumulation of p53 protein results in a more increased cell proliferation in Bowen's disease.
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Affiliation(s)
- M Takata
- Department of Dermatology, Kanazawa University School of Medicine, Japan
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Abstract
BACKGROUND The bcl-2 protein has been shown to suppress apoptosis, and overexpression of the bcl-2 protein has been reported in several malignant tumors. Skin is one of the largest organs in the body, and the most common human malignancies arise from keratinocytes in the epidermis. In this paper, the authors analyzed immunohistochemically the expression of the bcl-2 protein in several keratinocytic (KC) tumors and inflammatory skin disorders to investigate the role of bcl-2 in the development of benign and malignant skin tumors. METHODS Seventy-two frozen tissues from patients with inflammatory KC proliferation (chronic dermatitis [CD] and psoriasis vulgaris [PV]), seborrheic keratosis (SK), carcinoma in situ of KC tumors (actinic keratosis [AK] and Bowen's disease [BD]), basal cell carcinoma (BCC), and squamous cell carcinoma (SCC), 2 SCC cell lines, and 20 normal skin were immunostained with an anti-bcl-2 monoclonal antibody. RESULTS Tissue with normal KC, CD, PV, and SK scarcely expressed the bcl-2 protein. Seventy-three percent of tissue with BD, 25% with AK, 67% with BCC, and 100% with SCC showed obvious bcl-2 protein expression. bcl-2 expression of BCC, BD, and SCC was restricted to the involved lesions, and surrounding normal tissue with KCs were bcl-2 negative. Interestingly, tissue with atrophic AK expressed no bcl-2 protein (none of five cases), whereas tissue with hypertrophic AK reacted weakly with the anti-bcl-2 antibody (two of three cases). CONCLUSIONS bcl-2 protein expression in patients with KC may be related to tumorigenic proliferation possibly due to enhanced cell survival, but not when inflammatory proliferation of keratinocytes is present.
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Affiliation(s)
- K Nakagawa
- Department of Dermatology, Kobe University School of Medicine, Japan
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Abstract
The cutaneous basement membrane zone (BMZ) is composed of a large number of molecular components. We have recently reported that one of the CD1b monoclonal antibodies (MoAb), NU-T2, reacts to the BMZ of the normal human skin, esophagus and stomach. In order to further elucidate the biological properties of the NU-T2-BMZ antigen, we investigated the expression of NU-T2-BMZ antigen and type VII collagen (well identified component of anchoring fibrils) in various skin tumors such as basal cell epithelioma (BCE), squamous cell carcinoma, Bowen's disease, actinic keratosis and seborrheic keratosis. NU-T2 MoAb failed to react to the BMZ in all BCE. Anti-type VII collagen MoAb showed reduced staining of the BMZ in some nests of BCE. Both antigens, however, were preserved in the BMZ of other skin tumors as in the normal adjacent skin. Furthermore, anti-type VII collagen MoAb demonstrated the clear intratumoral staining in all BCE examined. The abnormal expression of NU-T2-BMZ antigen and type VII collagen may partly explain the space formation between the BCE nests and the surrounding stroma frequently observed in histology.
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Affiliation(s)
- N Yasaka
- Department of Dermatology, Yamanashi Medical University, Japan
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Alkemade HA, Molhuizen HO, van Vlijmen-Willems IM, van Haelst UJ, Schalkwijk J. Differential expression of SKALP/Elafin in human epidermal tumors. Am J Pathol 1993; 143:1679-87. [PMID: 8256855 PMCID: PMC1887253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Recently we described a new epidermal serine proteinase inhibitor, skin-derived antileukoproteinase (SKALP), also known as elafin. SKALP/elafin was found to be absent in normal human epidermis, but can be induced in vitro and in vivo under hyperproliferative conditions. Here we studied the expression of SKALP/elafin in several types of epidermal tumors (basal cell carcinoma, squamous cell carcinoma, Bowen's disease, actinic keratosis, and keratoacanthoma). Using immunohistochemical staining SKALP/elafin appeared to be differentially expressed in these tumors. Functional measurements of anti-proteinase activity, and Western blotting of tumor extracts confirmed our findings at the histological level. In well differentiated squamous cell carcinoma, SKALP/elafin messenger RNA was demonstrated by non-radioactive in situ hybridization. We conclude that SKALP/elafin is a marker for abnormal or disturbed squamous differentiation. A possible role of SKALP/elafin in the control of tumor cell invasion is discussed.
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MESH Headings
- Blotting, Western
- Bowen's Disease/chemistry
- Bowen's Disease/pathology
- Carcinoma, Basal Cell/chemistry
- Carcinoma, Basal Cell/pathology
- Carcinoma, Basal Cell/physiopathology
- Carcinoma, Squamous Cell/chemistry
- Carcinoma, Squamous Cell/pathology
- Carcinoma, Squamous Cell/physiopathology
- Electrophoresis, Polyacrylamide Gel
- Humans
- Immunohistochemistry
- In Situ Hybridization
- Keratoacanthoma/metabolism
- Keratoacanthoma/pathology
- Proteinase Inhibitory Proteins, Secretory
- Proteins
- RNA, Messenger/analysis
- RNA, Messenger/genetics
- Serine Proteinase Inhibitors/analysis
- Serine Proteinase Inhibitors/genetics
- Serine Proteinase Inhibitors/metabolism
- Skin/chemistry
- Skin/metabolism
- Skin/pathology
- Skin Diseases/metabolism
- Skin Diseases/pathology
- Skin Neoplasms/chemistry
- Skin Neoplasms/pathology
- Skin Neoplasms/physiopathology
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Affiliation(s)
- H A Alkemade
- Department of Dermatology, Academic Hospital Nijmegen, The Netherlands
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Dürst M, Kleinheinz A, Hotz M, Gissmann L. The physical state of human papillomavirus type 16 DNA in benign and malignant genital tumours. J Gen Virol 1985; 66 ( Pt 7):1515-22. [PMID: 2991428 DOI: 10.1099/0022-1317-66-7-1515] [Citation(s) in RCA: 385] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
Cloned DNA from human papillomavirus (HPV) type 16 was subjected to restriction enzyme analysis. A genome size of 7.8 +/- 0.1 kb was determined and restriction maps were prepared. Fragments of HPV 16 DNA were nick-translated and hybridized with fragments of HPV 6b DNA. The two genomes appeared to be colinear. The physical state of HPV 16 DNA in genital tumours was analysed. In each of six benign tumours the viral DNA was detected exclusively as 8 kb circles. In four malignant tumours the viral DNA appeared to be integrated within the host genome but one cervical carcinoma and one case of Bowen's disease also contained oligomeric episomal molecules of viral DNA. One cervical carcinoma (WV 2965), containing only integrated viral DNA, was examined in detail. HPV 16 DNA was integrated as head-to-tail tandem repeats at more than one site. Three virus/cell junction fragments from this tumour were cloned. Two contained lengths of repetitive cellular DNA and one a length of apparently single copy cellular DNA.
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