Viola K. DeTemple , Cathrin Ritter , Nalini Srinivas , Ivelina Spassova , Thilo Gambichler , Svea Hüning , Nikolai Gräger , Ralf Gutzmer , Eva-Bettina Bröcker , Selma Ugurel , David Schrama , Jürgen C. Becker
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引用次数: 0
Abstract
Background
Presence of micrometastases in the sentinel lymph node (SLN) is currently used to assess prognosis of melanoma patients. The immunoactivity within the SLN is known to be influenced by the primary tumor (PT), which may in turn impact the SLNs’ metastatic state.
Aim
We characterize the temporal dependence and underlying mechanisms of the immunological effects of the PT on the SLN.
Methods
The prognostic value of SLN state as a function of PT removal time was evaluated. To put the results into a functional context, selected PTs and corresponding SLNs were analyzed for gene and protein expression patterns.
Results
In a cohort of 202 patients with known distant metastasis and similar PT prognostic characteristics, SLNs removed before or within one week after the PT (IM-SLN) had a higher incidence of micrometastases than those removed at least one week after the PT (DEL-SLN).
The immunoactivity in IM-SLN was found to be lower than in DEL-SLN. Specifically, in IM-SLNs, T helper 17 / regulatory T-cells were predominant, whereas in DEL-SLNs, cytotoxic γδT-cells were more frequent. The higher immune activity in DEL-SLNs was probably facilitated by CD209+ antigen-presenting cells. Indeed, in PT with high TGFβ expression CD209+ cells appear to be trapped and no increased immunoactivity was observed in DEL-SLN.
Conclusions
Presence of micrometastases in DEL-SLNs have a higher negative prognostic value as in IM-SLNs since they indicate not only a melanoma’s propensity to metastasize, but possibly also its capacity to escape immune responses.
期刊介绍:
The European Journal of Cancer (EJC) serves as a comprehensive platform integrating preclinical, digital, translational, and clinical research across the spectrum of cancer. From epidemiology, carcinogenesis, and biology to groundbreaking innovations in cancer treatment and patient care, the journal covers a wide array of topics. We publish original research, reviews, previews, editorial comments, and correspondence, fostering dialogue and advancement in the fight against cancer. Join us in our mission to drive progress and improve outcomes in cancer research and patient care.