Protein profiling of angiogenesis-related growth factors in laryngeal carcinoma: Pattern of protein expression in relation to tumour progression

Abstract

Abstract. The expression of angiogenesis-related proteins was determined in laryngeal tumour tissue, associated tumour involved lymph nodes, apparently normal mucosa and control tissue and were related to tumour stage. Both laryngeal tumour tissue and associated metastatic nodes were obtained from seven patients undergoing surgical resection; in four cases apparently normal mucosa was also dissected from the tumour specimen margins. Control uvula mucosa was obtained from five healthy volunteers undergoing uvulopalatopharyngoplasty. The relative expression of 55 angiogenesis-related proteins was determined in tissue lysates using a Proteome Profiler human angiogenesis array kit. The level of 32/55 angiogenesis-related proteins was higher in tumour tissue compared with controls. Furthermore, in these tumour biopsies higher levels of proteins were associated with increasing tumour stage. A similar trend was seen for 29/32 of these proteins in the nodal tissue. In T4 stage tumour tissue samples, 29/55 angiogenensis-related proteins were more highly expressed compared with the adjacent normal mucosa from the same patient, and this decreased to 8 proteins in tumour tissue from the T1 stage patients. In contrast, the expression of 23 angiogenesis-related proteins in metastatic lymph node tissue from T4 stage patients was lower compared with that found in the normal mucosa adjacent to the tumour. In conclusion, this study has identified a number of factors involved in angiogenesis that are likely to contribute to the growth and metastasis of laryngeal tumours. Furthermore, a number of factors were also substantially altered in metastatic deposits compared with the primary tumour mass or adjacent normal tissue. This study requires confirmatory analysis of the selected key factors in a larger cohort of patients.

The Role of MMP8 in Cancer: A Systematic Review

“…Patients with tonsillar SCC showed higher MMP8 levels compared to patients with benign tonsillar disease [66]. MMP8 protein did not have a prognostic value in larynx tumors [43] where its levels varied greatly between patients, nor in supraglottic laryngeal tumors [45] where it was detected in only a few cells. Likewise, no difference in MMP8 protein levels were found between salivary gland carcinomas and normal tissue [46].…”

The Development of an Angiogenic Protein “Signature” in Ovarian Cancer Ascites as a Tool for Biologic and Prognostic Profiling

“…The Proteome Profiler TM Human Angiogenesis Array Kit, (R&D Systems, USA, Catalog Number: ARRY 007) [ 18 ] was employed to screen for the presence of 55 soluble angiogenesis-related factors ( Table 1 ) in the patients’ ascitic fluid according to the manufacturer’s instructions. Briefly, 1ml of the supernatant from ascitic fluid is incubated with 500 μl of a relevant buffer and 15 μl of a mixture of biotinylated antibodies (specific for each of the 55 factors) for 1 hour.…”