In situ hybridization of parathyroid hormone-related protein in normal skin, skin tumors, and gynecological cancers using digoxigenin-labeled probes and antibody enhancement
| Autor: | J. C. McHALE, P M Ingleton, S T Chou, Janine A. Danks, J P Scurry, S P Clark, T. J. Martin |
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| Rok vydání: | 1995 |
| Předmět: |
Pathology
medicine.medical_specialty Skin Neoplasms Histology Genital Neoplasms Female Molecular Sequence Data Cell Human skin In situ hybridization chemistry.chemical_compound medicine Humans Digoxigenin RNA Messenger In Situ Hybridization Skin Messenger RNA Base Sequence Parathyroid hormone-related protein Chemistry Parathyroid Hormone-Related Protein Antibodies Monoclonal Proteins Immunohistochemistry Molecular biology medicine.anatomical_structure Carcinoma Basal Cell Carcinoma Squamous Cell Female Anatomy DNA Probes Keratinocyte hormones hormone substitutes and hormone antagonists |
| Zdroj: | Journal of Histochemistry & Cytochemistry. 43:5-10 |
| ISSN: | 1551-5044 0022-1554 |
| DOI: | 10.1177/43.1.7822764 |
| Popis: | We describe a novel procedure for in situ hybridization that combines the use of digoxigenin-labeled oligonucleotide probes with an antibody enhancement step that can be performed on formalin-fixed, paraffin-embedded tissues. Addition of a second antibody enhances the visibility of parathyroid hormone-related protein (PTHrP) mRNA expression from barely to highly discernible and interpretable, with virtually no nonspecific background expression. This technique has allowed visualization of PTHrP mRNA in normal human skin and epithelium-derived tumors. PTHrP mRNA expression was confined to the basal and spinous keratinocyte layers of skin. There was strong hybridization in the spinous keratinocyte layer and a low level of hybridization in the basal layer. An extensive panel of positive and negative controls included poly d(T) probe to indicate total mRNA present in the sections. Squamous cell carcinomas and basal cell carcinomas of the skin, from pathology archives, were examined for the presence of PTHrP mRNA. The results reflected previous immunohistochemical studies, with every squamous cell carcinoma hybridizing strongly with the PTHrP probes. The basal cell carcinomas showed no expression of PTHrP mRNA, although the total mRNA signal was very strong. The localization of PTHrP mRNA in the tumors of the gynecological tract also reflected the immunohistochemical findings, with expression found in the squamous cell carcinomas but not in the adenocarcinomas. In situ hybridization with digoxigenin-labeled oligonucleotide probes and antibody enhancement has provided a sensitive, highly specific procedure for detection of PTHrP mRNA in tumors and normal tissue. |
| Databáze: | OpenAIRE |
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