Related Experiment Video
Updated: Jun 11, 2026
09:36
Study of Cell Migration in Microfabricated Channels
Published on: February 21, 2014
Lipocalin-2-loaded amphiphilic polyanhydride microparticles accelerate cell migration
Latrisha K Petersen1, Amy S Determan, Christine Westgate
1a Department of Chemical and Biological Engineering, Iowa State University, 2035 Sweeney Hall, Ames, IA 50011, USA.
Journal of Biomaterials Science. Polymer Edition
|July 10, 2010
Summary
Amphiphilic polyanhydride microparticles stabilize and control the release of proteins like lipocalin 2 (Lcn2). These protein-loaded microparticles maintain Lcn2
Area of Science:
- Biomaterials Science
- Drug Delivery Systems
- Protein Stabilization
Background:
- Proteins require protective environments for therapeutic applications.
- Lipocalin 2 (Lcn2) is an acute-phase protein involved in cell migration and tissue repair.
- Controlled protein delivery is crucial for maintaining biological activity.
Purpose of the Study:
- To develop and evaluate amphiphilic polyanhydride microparticles for protein stabilization and controlled release.
- To assess the ability of these microparticles to maintain the structure and function of encapsulated lipocalin 2 (Lcn2).
- To investigate the therapeutic potential of these microparticle systems.
Main Methods:
- Fabrication of protein-loaded polyanhydride microparticles using cryogenic atomization.
- Co-polymers of 1,6-bis(p-carboxyphenoxy)hexane (CPH) and 1,6-bis(p-carboxyphenoxy)-3,6-dioxaoctane (CPTEG) were utilized.
- In vitro release kinetics and biological activity assays using human colon epithelial cells (HCT116).
Main Results:
- Amphiphilic polyanhydride microparticles successfully encapsulated and stabilized lipocalin 2 (Lcn2).
- In vitro release kinetics were dependent on the polymer carrier composition (CPTEG/CPH ratio).
- Released Lcn2 from 50:50 and 20:80 CPTEG/CPH microparticles retained biological activity, enhancing HCT116 cell migration.
Conclusions:
- Amphiphilic polyanhydride microparticles offer a promising platform for stabilizing proteins and enabling controlled drug delivery.
- These microparticles can enhance the therapeutic efficacy of proteins by maintaining their structure and function.
- The study highlights the potential of these microparticles for future therapeutic applications in protein/drug delivery.
Related Concept Videos
01:09Cell Migration
Cell migration, the process by which cells move from one location to another, is essential for the proper development and viability of organisms throughout their life. When cells are not able to migrate properly to their ordained locations, various disorders may occur. For example, disruption in cell migration causes chronic inflammatory diseases such as arthritis.
01:19Cell Migration
Cell migration is a process by which the cells move from one location to another, playing an essential role in embryological development, repair and regeneration, immune response, and metastasis. Cells migrate in response to chemical or mechanical signals generated by specific organs or tissues. The overall mechanism includes three steps - polarization, protrusion, and release. Polarization involves the formation of a distinct cell front and rear, which determines the direction of movement.
01:35Cancer 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...
01:31Mechanism of Lamellipodia Formation
Cells migrating in response to external stimuli form lamellipodia, which are thin membrane protrusions supported by a mesh of linked, branched, or unbranched actin filaments. These actin filaments interact with myosin motor proteins, creating the dynamic actomyosin complex within the cytoskeleton. Contractility, or the ability to generate contractile stress, is inherent to the actomyosin complex. It helps cells detect the stiffness of the surrounding ECM and exert contractile force for...
01:13Actin Polymerization and Cell Motility
Actin is a family of globular proteins that are highly abundant in eukaryotic cells. It makes up approximately 1-5% of total cell protein concentration. Actin monomers polymerize to form a complex network of polarized filaments, the actin cytoskeleton, that plays a crucial role in many cellular processes, including cell motility, division, endocytosis, and metastasis of cancer cells.
Actin cytoskeleton dynamics can produce pushing, pulling, and resistance forces that help the cell to migrate.
Actin cytoskeleton dynamics can produce pushing, pulling, and resistance forces that help the cell to migrate.
01:21Cell Polarization by Rho Proteins
Cell polarity is the asymmetric distribution of cellular and membrane components, making one side of the cell different from the other. This polarity is essential to many processes such as embryogenesis, axon migration, glucose transport across epithelial cells, and directional cell migration. A migrating cell responds to intracellular or extracellular signals via molecular cascades that reorganize the actin cytoskeleton to establish this polarity. In these cells, the Rho family proteins Cdc42,...