Integrins and tumor cell dissemination

E Ruoslahti1, F G Giancotti

  • 1Cancer Research Center, La Jolla Cancer Research Foundation, California 92037.

Cancer Cells (Cold Spring Harbor, N.Y. : 1989)
|December 1, 1989
PubMed

Insights

Tumor cell metastasis relies on cell adhesion, particularly involving integrins. Understanding integrin roles in normal and cancer cells could guide new cancer therapies.

Area of Science:

  • Cell Biology
  • Molecular Biology
  • Cancer Research

Background:

  • Tumor cell metastasis is a complex process influenced by cellular adhesion.
  • Integrins, a family of cell surface receptors, mediate crucial interactions with the extracellular matrix and other cells.
  • Dysregulation of integrin function is implicated in cancer progression.

Purpose of the Study:

  • To review recent advancements in understanding the role of integrins in normal and malignant cells.
  • To explore how integrin research can inform future therapeutic strategies for cancer.

Main Methods:

  • Literature review of recent studies on integrin function in cell adhesion and metastasis.
  • Analysis of research focusing on specific integrin subtypes in various cancer models.
  • Synthesis of findings related to integrin signaling pathways and their therapeutic targeting.

Main Results:

  • Integrins play a critical role in mediating tumor cell adhesion to the extracellular matrix and facilitating invasion.
  • Specific integrin profiles correlate with different cancer types and metastatic potential.
  • Targeting integrin function presents a promising avenue for developing anti-metastatic therapies.

Conclusions:

  • A deeper understanding of individual integrin functions is essential for developing effective cancer treatments.
  • Targeting integrin-mediated adhesion pathways holds significant therapeutic potential for inhibiting tumor metastasis.

Related Concept Videos

Metastasis02:30

Metastasis

Metastasis is the spread of cancer cells from the original site to distant locations in the body. Cancer cells can spread via blood vessels (hematogenous) as well as lymph vessels in the body.
Epithelial-to-Mesenchymal Transition
The epithelial-to-mesenchymal transition or EMT is a developmental process commonly observed in wound healing, embryogenesis, and cancer metastasis. EMT is induced by transforming growth factor-beta (TGF-β) or receptor tyrosine kinase (RTK) ligands, which further...
Cancer Cell Migration through Invadopodia01:35

Cancer Cell Migration through Invadopodia

Invadosome is a broad category of cell surface structures with proteolytic activity that  degrades the extracellular matrix (ECM). Invadosomes are present in normal cell types, including macrophages, endothelial cells, and neurons, as well as tumor cells. Although the macrophage podosomes and tumor cell invadopodia are classified as invadosomes, they have different structures, molecular pathways, and functions. Podosomes are short structures that last for a few minutes. However, invadopodia can...
Integrins01:10

Integrins

Animal and protozoan cells do not have cell walls to help maintain shape and provide structural stability. Instead, these eukaryotic cells secrete a sticky mass of carbohydrates and proteins into the spaces between adjacent cells. This network of proteins and molecules is called an extracellular matrix or ECM.
Some ECM proteins assemble into a basement membrane to which the remaining components adhere. Proteoglycans typically form the bulk of the ECM while fibrous proteins, like collagen,...
Activation of Integrins01:15

Activation of Integrins

Integrins bind ligands and transmit information from outside the cell to inside or vice-versa through an "outside-in signaling" or "inside-out signaling."
In "outside-in signaling," external factors in the extracellular space bind to exposed ligand binding sites on integrins. This causes the inactive protein to undergo a conformational change to become active. Integrins are often clustered on the cell membrane. Repetitive and regularly spaced ligand binding events provide an effective stimulus.
Intracellular Signaling Affects Focal Adhesions01:17

Intracellular Signaling Affects Focal Adhesions

Integrins act both as extracellular input receivers and as intracellular processing activators. As their name suggests, integrins are entirely integrated into the membrane structure. Their hydrophobic membrane-spanning regions interact with the phospholipid bilayer's hydrophobic region. These membrane receptors provide extracellular attachment sites for effectors like hormones and growth factors. They activate intracellular response cascades when their effectors are bound and active.
Some...
Selectins01:25

Selectins

Cell adhesion is  an essential aspect of multicellularity. While stable cell interactions usually occur between cells of the same type, transient cell interactions occur between cells of different tissue types, such as between neutrophils and endothelial cells. Selectins are one class of cell adhesion molecules (CAMs) that bind carbohydrate ligands to form transient cell adhesion. They are rod-like proteins with a long extracellular part of variable length ending with the lectin domain, which...