Spatial Characterization of Macrophages in SLN of Melanoma

Why This Research Matters
Lymph node macrophages are important immune cells that help protect our bodies from diseases that include infectious diseases and spreading of solid cancer like melanoma, a very serious type of skin cancer. When melanoma develops on the skin, it releases molecules into the surrounding tissue fluid that flow into regional lymph nodes and change macrophage’s function. These changes can make it easier for the cancer cells that flow into the lymph node to grow and spread throughout the body (metastasize).

What We Are Studying
Our goal is to study how macrophages change in people with melanoma compared to healthy individuals. We want to look at how these cells behave in normal lymph nodes and in lymph nodes that have melanoma. Melanoma can spread quickly through the lymphatic system, which is a network that helps transport fluids and fight infections. The first lymph nodes that melanoma reaches are called “Sentinel Lymph node” or (SLN). These nodes are important because they help create an environment, known as a “premetastatic niche,” that can help cancer survive and grow. Macrophages in the lymph nodes are particularly affected by signals from melanoma. When they change, they may not be able to fight cancer effectively. Instead, they might produce substances that weaken the immune response, allowing the melanoma to thrive.

How the Study Works
By studying how these changes happen, we hope to learn more about the role of macrophages in melanoma. Our main objective is to identify the differences in macrophages found in the SLN of melanoma patients compared to those in healthy people. We will use special techniques to analyze these cells closely. By sorting macrophages from normal lymph nodes and from SLN that are either negative or positive for melanoma, we can see how they function and what has changed.

Expected Impact
Through this research, we aim to improve our understanding of how melanoma affects immune cells. This knowledge can help develop new strategies to boost the immune response against melanoma and improve treatment options for patients.