The results suggested variable expression of immune cell populations might explain differences in prognoses for OSCC patients despite their same TNM stage and similar clinical features. with Benzoylmesaconitine similar clinical characteristics at the T1N0M0 stage had different cell subtypes, including CD4+ T cells, CD8+ T cells, CD19+ B cells, CD11c+ dendritic cells, CD56+ natural killer cells, granulocytes, etc. More immunosuppressive cells were found in the sample of patient 1. We propose that differences in the tumor microenvironment of samples may contribute to different patients prognosis in RASGRF1 the future. Conclusions High-dimensional proteomics analyses using the Hyperion imaging system help identify and analyze the tumor microenvironment heterogeneity of OSCC. Our study now presents this valuable resource and explains the potential reasons behind early OSCC patients poor prognosis. CD antibodies were used to visualize immune cells, structural proteins were used to visualize histological landmarks, and the Ki-67 and CK proteins were used to identify tumor Benzoylmesaconitine cells. All antibodies were conjugated to metal tags according to the manufacturers instruction on Hyperion tissue imager. Table 1 Antibodies targeting the tumor environment of oral squamous cell carcinoma (OSCC) CD3 and CD8 populations in patient four were found to outnumber those in other patients, implying that patient four had a better tumor immune microenvironment. Besides, HLA-DR and CD11c were mainly observed in the sample of patient two, while being close to completely absent in those of other patients (molecular markers, including CD15, CD33, CD11b, CD14, PD-1, PD-L1, PD-L2, Ki-67, and -catenin, were more strongly expressed in patient one comparing to other patients. This data indicated a distinctive tumor microenvironment for patient one, which was seen to be more immunosuppressive. Open in a separate window Figure 3 Cluster analysis of oral squamous cell carcinoma (OSCC) samples. (A) t-SNE descending dimension map of the 4 samples of OSCC. The colors represent different samples; (B) differential expression of tumor microenvironment markers and cluster analysis of the 4 samples. Discussion One of the most pivotal reasons for unsuccessful OSCC treatment is a standardized treatment strategy that does not consider the heterogeneous nature of the tumor microenvironment. As a result, some OSCC patients tend to have a less ideal response to uniform treatments and hence worse prognoses than others. While previous literature have demonstrated substantial influences of tumor microenvironment on the prognosis of cancer (18,19), further studies on the heterogeneous features will help improve the understanding and accuracy of prognosis determination for OSCC patients. Hyperion imaging system is an ideal analytical tool for multi-parametric detection and analyses of heterogeneity in the tumor microenvironment as it allows simultaneous detection of dozens of markers in the same tissue section. It has been successfully applied in numerous areas, showing the composition of many tumor microenvironments (12,20). However, to date, there was no literature on using the Hyperion imaging system to explore the role of intratumoral heterogeneity in OSCC. Therefore, our study aimed to fill in the gap by detecting and analyzing heterogeneity of the tumor microenvironment of OSCC, thereby improving the precision of tumor prognosis using the system. Our study presented an atlas of immune microenvironment based on a panel of 26 antibodies, as we also identified several major immune cell phenotypes, including CD8+ T cells, CD56+ NK cells, CD11c+ dendritic cells, CD15+ granulocytes, CD19+ B cells, and CK+ tumor cells subsets. Previous studies have demonstrated that cytotoxic CD8+ T cells inhibited tumor growth by targeting antigenic tumor cells (6). Our study found a high expression of CD8+T cells in patient four, suggesting a potentially better prognosis for the patient. Natural killer cells (NK cells) are critical immune cells in the body, yet in published studies, conclusions about their role in oral squamous cell carcinoma had not reached a consensus. Indeed, most authors thought that Benzoylmesaconitine NK cells presence was closely related to the excellent prognosis of OSCC. For example, Agarwal reported that NK cells were significant markers for the good prognosis of OSCC (21). Ikeda further suggested that even a small number of NK cells were still conducive to determining advanced OSCC (22). According to Dovaks research, radiotherapy could cause a continuous decrease of T cells and B cells in OSCC patients, but the quick recovery of NK cells played a crucial role in the immune Benzoylmesaconitine maintenance of OSCC patients (23). In our study, the Benzoylmesaconitine high expression of CD56 in patient two and patient three.
