Increased expression of the M(r) 67,000 laminin receptor (LR) is a consistent event which appears as cancer cells acquire an invasive and metastatic phenotype, The M(r) 67,000 LR is one of the many laminin-binding proteins able to interact with the major glycoprotein of basement membranes, laminin. The recent development of a specific monoclonal antibody directed against the M(r) 67,000 LR MLuC5 has allowed us to study large retrospective groups of human cancers with the aim of correlating the M(r) 67,000 LR expression to the clinical, pathological, and survival data of the patients, A significant correlation has already been established between the increased expression of M(r) 67,000 LR and survival of patients with breast, colon, ovary, lung, and endometrial cancers, In this study, we investigated the possibility that the detection of M(r) 67,000 LR in thyroid human cancers could also be of prognostic value, We analyzed the expression of M(r) 67,000 LR with immunohistochemistry using MLuC5 antibodies in paraffin sections of 40 benign and 170 malignant thyroid human tumors, We found that M(r) 67,000 LR was not usually detectable in normal thyroid tissues adjacent to the lesion, Only 3 of the 40 thyroid adenomas examined (7.5%) presented cells positive for M(r) 67,000 LR, For the malignant thyroid tumors examined, we found that 22.3% of papillary thyroid carcinomas, 38% of follicular thyroid carcinomas, 40% of poorly differentiated carcinomas, 25% of medullary carcinomas, and 58.3% of anaplastic carcinomas expressed a high level of M(r) 67,000 LR, Although no correlation between the M(r) 67,000 LR expression and survival was found in patients with follicular thyroid carcinomas, papillary thyroid carcinomas, anaplastic carcinomas, and medullary carcinomas, there was a significant correlation in primary thyroid cancers, Our data represent the first extensive study of the M(r) 67,000 LR expression in human thyroid cancers and strongly suggest that its detection could be of prognostic value in the investigation of primary thyroid cancers.
Expression of the M(r) 67,000 laminin receptor is an adverse prognostic indicator in human thyroid cancer: An immunohistochemical study
BASOLO, FULVIO;FONTANINI, GABRIELLA;BEVILACQUA, GENEROSO
1996-01-01
Abstract
Increased expression of the M(r) 67,000 laminin receptor (LR) is a consistent event which appears as cancer cells acquire an invasive and metastatic phenotype, The M(r) 67,000 LR is one of the many laminin-binding proteins able to interact with the major glycoprotein of basement membranes, laminin. The recent development of a specific monoclonal antibody directed against the M(r) 67,000 LR MLuC5 has allowed us to study large retrospective groups of human cancers with the aim of correlating the M(r) 67,000 LR expression to the clinical, pathological, and survival data of the patients, A significant correlation has already been established between the increased expression of M(r) 67,000 LR and survival of patients with breast, colon, ovary, lung, and endometrial cancers, In this study, we investigated the possibility that the detection of M(r) 67,000 LR in thyroid human cancers could also be of prognostic value, We analyzed the expression of M(r) 67,000 LR with immunohistochemistry using MLuC5 antibodies in paraffin sections of 40 benign and 170 malignant thyroid human tumors, We found that M(r) 67,000 LR was not usually detectable in normal thyroid tissues adjacent to the lesion, Only 3 of the 40 thyroid adenomas examined (7.5%) presented cells positive for M(r) 67,000 LR, For the malignant thyroid tumors examined, we found that 22.3% of papillary thyroid carcinomas, 38% of follicular thyroid carcinomas, 40% of poorly differentiated carcinomas, 25% of medullary carcinomas, and 58.3% of anaplastic carcinomas expressed a high level of M(r) 67,000 LR, Although no correlation between the M(r) 67,000 LR expression and survival was found in patients with follicular thyroid carcinomas, papillary thyroid carcinomas, anaplastic carcinomas, and medullary carcinomas, there was a significant correlation in primary thyroid cancers, Our data represent the first extensive study of the M(r) 67,000 LR expression in human thyroid cancers and strongly suggest that its detection could be of prognostic value in the investigation of primary thyroid cancers.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
