• HLA class II antigen expression in human papillomavirus-associated cervical cancer.

      Glew, Susan S; Duggan-Keen, Margaret F; Cabrera, T; Stern, Peter L; Cancer Research Campaign Department of Immunology, Paterson Institute for Cancer Research, Christie Hospital, Manchester, United Kingdom. (1992-07-15)
      The observation that tumor cells of some neoplasms display major histocompatibility complex (MHC) class II molecules may be of functional significance, influencing the progression of malignancy by allowing the cancer cells to present antigen to the immune system. In the normal cervix, class II molecules are expressed by columnar but not squamous epithelium. The pattern of MHC class II expression in cervical carcinomas has been documented using immunohistochemical methods. Of 53 cervical squamous carcinomas examined for MHC class II expression, only 17% maintained a negative phenotype characteristic of the epithelium from which they were derived, while the remaining tumors exhibited either uniform (45%) or heterogeneous (38%) expression. Tumor areas which were class II positive also express class II associated invariant chain and the adhesion molecules lymphocyte function antigen 3 and intercellular adhesion molecule 1. The DR, DP, and DQ class II MHC subloci are differentially expressed, suggesting independent regulation. There is a trend for tumors with the uniform class II phenotype to predominantly express DR antigen, whereas tumors of the heterogeneous class II phenotype express with equal frequency either DR or DP antigens dominantly. There is no apparent influence of class II status on lymphocyte infiltration of the tumors. The presence of human papillomavirus 16 DNA in the cervical carcinoma specimens was analyzed by Southern blotting of restriction enzyme digested DNA and no correlation between the presence of human papilloma virus and MHC class II expression was found.
    • Implications for immunosurveillance of altered HLA class I phenotypes in human tumours.

      Garrido, F; Ruiz-Cabello, F; Cabrera, T; Pérez-Villar, J J; López-Botet, M; Duggan-Keen, M; Stern, Peter L; Dpto de Análisis Clinicos e Inmunología, Hospital Universitario Virgen de las Nieves, Universidad de Granada, Spain. Fgarrido@golialt. ugr.es (1997-02)
      HLA class I downregulation is a frequent event associated with tumour invasion and development. Altered HLA class I tumour phenotypes can have profound effects on T-cell and natural killer (NK)-cell antitumour responses. Here, Federico Garrido and colleagues analyse these altered tumour phenotypes in detail, indicating their potential relevance for implementation of immunotherapeutic protocols and strategies to overcome tumour escape mechanisms.
    • Natural history of HLA expression during tumour development

      Garrido, F; Cabrera, T; Concha, A; Glew, Susan S; Ruiz-Cabello, F; Stern, Peter L; Dept of Analisis Clinicos e Immunologia, Hospital Virgen de las Nieves, Universidad de Granada 18014 Granada, Spain (1993)