Pre-metastatic Niche
Pre-metastatic Niche - Related Videos
11:41
Methods for Culturing Human Femur Tissue Explants to Study Breast Cancer Cell Colonization of the Metastatic Niche
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Cited by 20 •
2015
Protocols are described for studying breast cancer cell migration, proliferation and colonization in a human bone tissue explant model system.
03:52
Experimental Metastatic Melanoma Mouse Model: A Platform to Study the Metastatic Potential of Melanoma Cells in the Lungs
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2023
In this video, melanoma cells are intravenously injected through the tail vein in the mouse model. The melanoma cells further travel through the circulatory system, adapting to the distant microenvironment and causing metastasis in organs like lungs.
02:02
Ecological Niches
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2026
All organisms have a position within an ecosystem. The complete set of living and nonliving factors—including food resources, climate, and terrain—that define the position of a given organism are collectively referred to as the organism’s ecological niche.Multiple species cannot occupy the exact same niche within their habitat. If the niches of two or more species overlap to a large extent, the competitive exclusion principle dictates that one species will outcompete the other, forcing it to...
01:12
Ecological Niche
0 Views •
2026
Microorganisms occupy diverse habitats and perform essential ecological functions that are defined by their ecological niches. A microbial niche encompasses the organism’s mode of survival, including resource acquisition, reproduction, and interactions with other species in its environment. This concept is vital for understanding microbial community dynamics, biogeography, and ecosystem functionality.The fundamental niche of a microorganism includes the full spectrum of environmental...
09:14
An In Vitro System to Study Tumor Dormancy and the Switch to Metastatic Growth
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Cited by 39 •
2011
A modified 3-D in vitro system is presented in which growth characteristics of several tumor cell lines in reconstituted basement membrane correlate with the dormant or proliferative behavior of the tumor cells at a metastatic secondary site in vivo.
FAQs
Three signal classes are central: soluble factors, extracellular vesicles, and cytokines. Released by the primary tumor, they travel through the circulation and communicate with distant tissues before cancer cells arrive. Their coordinated effects help recruit bone marrow-derived cells and initiate local remodeling, making the tissue more receptive to later metastatic colonization.
Bone marrow-derived cells are not merely bystanders in this process. Signals from the primary tumor recruit them to distant tissues, where their presence contributes to the local changes associated with future colonization. Tracking this recruitment links a tumor’s systemic communication with measurable alterations in a target organ, helping researchers identify early events in dissemination.
Organ preference can reflect differences in how distant tissues respond to tumor-derived signals. Changes to the extracellular matrix can modify the local environment, while altered immune activity may make the tissue more supportive of arriving cancer cells. Examining both features helps explain why metastatic spread is not uniform across organs and why some sites become favored targets.
Researchers can connect events in the primary tumor with changes in distant organs before cancer cells appear there. Key observations include circulating soluble factors, extracellular vesicles, and cytokines, followed by bone marrow-derived cell recruitment, extracellular matrix remodeling, and immune alterations in candidate target tissues. This timeline helps distinguish preparation from later colonization.
Pre-metastatic niche research can support biomarkers that estimate metastatic risk. Such markers would be based on early signals or tissue changes associated with niche formation, rather than only on established secondary tumors. Their value lies in identifying dissemination-related risk before metastatic growth is fully evident, supporting research focused on earlier intervention.
Therapeutic strategies can target the tissue-conditioning phase rather than waiting for secondary tumors to grow. Two broad aims are to prevent the relevant distant-tissue changes or disrupt them after they begin. By addressing tumor-derived signals, recruited cells, matrix remodeling, or altered immune activity, researchers seek to reduce conditions that support successful metastatic growth.