Journal
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
Volume 24, Issue 12, Pages -Publisher
MDPI
DOI: 10.3390/ijms241210055
Keywords
brain metastasis; pre-metastatic niche; metastatic niche; brain pre-metastatic niche; vascular niche; single-cell sequencing; transcriptomics; advanced imaging
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Metastasis, especially brain metastasis, is still a mystery to researchers, and studying its molecular basis may lead to breakthroughs in combating this lethal cancer. The focus of recent research has shifted to understanding the early steps of metastasis formation, including how the primary tumor influences distant organ sites before tumor cells arrive. The concept of pre-metastatic niche encompasses various factors that affect future metastasis sites, such as immunological modulation and ECM remodeling. Although the mechanisms of brain metastasis are still elusive, studying the earliest steps in metastasis formation provides insights into these processes.
Metastasis, particularly brain metastasis, continues to puzzle researchers to this day, and exploring its molecular basis promises to break ground in developing new strategies for combatting this deadly cancer. In recent years, the research focus has shifted toward the earliest steps in the formation of metastasis. In this regard, significant progress has been achieved in understanding how the primary tumor affects distant organ sites before the arrival of tumor cells. The term pre-metastatic niche was introduced for this concept and encompasses all influences on sites of future metastases, ranging from immunological modulation and ECM remodeling to the softening of the blood-brain barrier. The mechanisms governing the spread of metastasis to the brain remain elusive. However, we begin to understand these processes by looking at the earliest steps in the formation of metastasis. This review aims to present recent findings on the brain pre-metastatic niche and to discuss existing and emerging methods to further explore the field. We begin by giving an overview of the pre-metastatic and metastatic niches in general before focusing on their manifestations in the brain. To conclude, we reflect on the methods usually employed in this field of research and discuss novel approaches in imaging and sequencing.
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