Gene expression changes of angiogenesis factors during basal skin cancer laser treatment

Abstract

Background: Basal cell carcinoma is the most widespread malignant skin neoplasm. Angiogenesis is critical for the growth and metastasis of malignant tumors.
 Aims: To study the levels of representation of transcripts in the foci of basal cell skin cancer before and after the therapy of genes for angiogenesis proteins and their receptors.
 Materials and methods: The study included 31 patients with confirmed basal cell skin cancer who received treatment, using a pulsed dye laser and long-pulsed neodymium laser. The patients provided skin punch biopsies from BCC lesions and after therapy from the same localization. The gene expression was analyzed with real-time reverse transcription PCR using endogeneous control, and the gene expression ration changes during the therapy were calculated according to Livaks double delta formulae.
 Results:
 An increased expression of the matrix metalloproteinase MMP9 and the tachykinin precursor TAC1 genes were revealed in skin biopsy samples of the superficial and nodular form of basal cell skin cancer during laser pulsed therapy. The expression of tumor necrosis factor TNF, epidermal growth factor receptor EGFR, fibroblast growth factor FGF2 genes increases to a lesser extent.
 It was shown that the expression of the calcitonin-related polypeptide alpha CALCA gene in the skin of patients is at basal level, which makes it possible to exclude the influence of the neuropeptide on the basal cell skin cancer pathogenesis.
 Conclusions:
 Among the factors of neoangiogenesis potentially influencing the development of basal cell skin cancer, the leading role of expression of the MMP9 matrix metalloproteinase and TAC1 precursor protein of tachykinin has been shown. Simultaneous changes in the level of these proteins may be due to neuroimmune interactions in the epidermis, which is probably realized by mast cells as the microenvironment of the basal cell carcinoma.