Tumor-secreted Ligands
Tumor-secreted Ligands - Related Videos
07:44
Studying the Effects of Tumor-Secreted Paracrine Ligands on Macrophage Activation using Co-Culture with Permeable Membrane Supports
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2019
Here, we present a method using permeable membrane supports to facilitate the study of non-contact paracrine signaling used by tumor cells to suppress the immune response. The system is amenable to studying the role of tumor-secreted factors in dampening macrophage activation.
09:03
Monitoring Functionality and Morphology of Vasculature Recruited by Factors Secreted by Fast-growing Tumor-generating Cells
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Cited by 7 •
2014
We describe a matrigel plug assay to illustrate angiogenic potential of a pool of factors secreted by cancer cells using two complementary imaging modalities, ultrasound and endomicroscopy. The matrigel, an extracellular matrix (ECM)-mimic gel, is utilized to introduce the host (mouse) with angiogenic factors secreted to the conditioned media...
02:40
Ligand Binding Sites
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2020
Proteins are dynamic macromolecules that carry out a wide variety of essential processes; however, the activities of most proteins depend on their interactions with other molecules or ions, known as ligands. Protein-ligand interactions are quite specific; even though numerous potential ligands surround a cellular protein at any given time, only a particular ligand can bind to that protein. Moreover, a ligand binds only to a dedicated area on the surface of the protein, known as the...
02:51
Metal-Ligand Bonds
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2020
The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes. In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
00:49
Ligand Binding and Linkage
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2020
Allosteric proteins have more than one ligand binding site; the binding of a ligand to any of these sites influences the binding of ligands to the other sites. When a protein is allosteric, its binding sites are called coupled or linked. In the case of enzymes, the site that binds to the substrate is known as the active site and the other site is known as the regulatory site. When a ligand binds to the regulatory site, this leads to conformational changes in the protein that can influence the...
FAQs
Receptor binding determines which cells respond and which intracellular pathways become active. A ligand may act on tumor cells, immune cells, fibroblasts, endothelial cells, or other nearby or distant targets, with consequences such as altered proliferation, survival, migration, angiogenesis, or immune activity. This receptor-dependent specificity helps explain why the same tumor signal can influence several aspects of cancer progression.
Tumor-secreted ligands can coordinate interactions among cancer cells and surrounding stromal, vascular, and immune populations. By changing fibroblast behavior, endothelial activity, or immune responses, they help create conditions that support tumor growth and alter host defenses. Studying these interactions shows that the microenvironment is not passive, but is continually influenced by communication from the tumor.
Measuring ligand production shows which signals cancer cells release, whereas examining ligand-receptor interactions addresses whether those signals can affect responsive cells. The distinction matters because abundance alone does not describe the full communication process. Comparing production with receptor-linked effects can clarify which signals are functionally associated with tumor growth, immune evasion, or other cancer-related behaviors.
A study can begin by measuring ligand production in cancer cells, then examining receptors on potential target populations such as immune cells, fibroblasts, endothelial cells, or tumor cells. Researchers can next assess associated intracellular pathways and changes in proliferation, survival, migration, angiogenesis, or immune activity. Blocking the ligand-receptor interaction provides an additional way to test functional relevance.
Patterns of ligand production can help identify signals associated with tumor-supportive communication or altered host responses. Researchers may compare production with downstream effects, including changes in proliferation, migration, angiogenesis, or immune activity, to determine whether a ligand provides informative biological readouts. Such measurements can contribute to biomarker development by linking tumor signaling with relevant cancer behaviors.
Blocking a ligand-receptor interaction is useful when researchers want to test whether a communication pathway contributes to tumor-supportive behavior. Reduced signaling can be evaluated in relation to cancer-cell survival or proliferation, movement, angiogenesis, and immune activity. This approach also supports therapeutic research aimed at disrupting signals that help tumors shape their surroundings or evade host defenses.