A Case of the Low-Grade, Non-Intestinal type Sinonasal Adenocarcinoma of Nasal Septum

Adenocarcinomas of the sinonasal tract are relatively rare. Such tumors are divided into salivary and nonsalivary types as classified by the World Health Organization. Nonsalivary sinonasal adenocarcinomas are further classified as intestinal (ITAC) and non-intestinal (non-ITAC), which can be separated even further into high-grade and low-grade. Low grade non-ITACs are more uncommon than ITACs. In this study, we present a case of low-grade non-ITAC in a 61-year-old woman who was successfully treated with wide excision without radiotherapy, and we also provide a review of the literature.

SP1 Mediates IFNgamma-induced TIMP-1 Transctription in C6 Astroglioma Cells / 대한해부학회지

Tissue inhibitors of metalloproteinases (TIMPs) comprise a family of secreted multifunctional proteins that consists of four members (TIMP-1 to TIMP-4). TIMPs are all major inhibitors of most matrix metalloproteinases (MMPs). They are synthesized by a variety of different cells and regulated by a number of cytokines and by growth and differentiation factors. The balance between MMPs and TIMPs plays a crucial role in the turnover of extracellular matrix in normal and pathological conditions. Here, we report that the production of TIMP-1 was upregulated in interferon (IFNgamma-treated C6 astroglioma cells and that the proximal 226 bp region of the promoter of the TIMP-1 gene is responsible for IFNgamma-induced induction in C6 astroglioma cells. The induction of TIMP-1 production by IFNgamma was virtually abolished by introducing mutations into the putative SP1-response element in the promoter, indicating that the SP1 binding site conferred responsiveness onto a heterologous promoter. Together the results suggest that the IFNgamma-induced upregulation of TIMP-1 production in C6 astroglioma cells is mediated by the SP1 binding site localized in the TIMP-1 gene promoter.