Related Experiment Video
Updated: Jun 28, 2026
04:21
Lumican Extraction from Amniotic Membrane and Determination of its Storage Temperature
Published on: October 14, 2022
Lumican, a small leucine-rich proteoglycan
Dragana Nikitovic1, Paulos Katonis, Aristidis Tsatsakis
1Lab of Histology, Medical School, University of Crete, Heraklion, Greece.
IUBMB Life
|October 25, 2008
Summary
Lumican, a small leucine-rich proteoglycan, influences cell functions vital for tissue health. Its role in cancer development and metastasis is complex and warrants further investigation into its molecular mechanisms.
Area of Science:
- Biochemistry
- Cell Biology
- Oncology
Background:
- Lumican is a small leucine-rich repeat proteoglycan.
- It plays a role in maintaining tissue homeostasis and modulating cell functions.
- Lumican expression is linked to various cancers, but its precise role in tumorogenesis is unclear.
Purpose of the Study:
- To review the role of lumican in cell biology.
- To explore the molecular mechanisms by which lumican influences tumorogenesis.
Main Methods:
- Literature review of studies on lumican.
- Analysis of molecular pathways involved in lumican's cellular functions.
Main Results:
- Lumican modulates cell proliferation, migration, and differentiation.
- Its expression patterns correlate with cancer growth and metastasis.
- Specific molecular mechanisms are proposed for lumican's involvement in tumor processes.
Conclusions:
- Lumican is a key regulator of cellular processes relevant to cancer.
- Understanding lumican's molecular functions is crucial for cancer research.
- Further studies are needed to elucidate its exact role in tumor development.
Related Concept Videos
00:55Laminins are the Adhesive Proteins of Basal Lamina
Laminins are heterotrimeric proteins with high molecular mass found in the extracellular matrix. Each laminin molecule is composed of three chains, viz. alpha, beta, and gamma, coded by five, four, and three paralogous genes, respectively. Laminins are categories based on the compositions of the three chains.
In humans, the five forms of alpha chains are LAMA 1, LAMA 2, LAMA 3, LAMA 4, and LAMA 5. The four forms of beta chains are LAMB 1, LAMB 2, LAMB 3, and LAMB 4. The three forms of gamma...
In humans, the five forms of alpha chains are LAMA 1, LAMA 2, LAMA 3, LAMA 4, and LAMA 5. The four forms of beta chains are LAMB 1, LAMB 2, LAMB 3, and LAMB 4. The three forms of gamma...
01:05Proteoglycans
Glycans, a class of complex heterogeneous molecules, can be covalently attached to proteins to form glycosylated proteins that regulate various physiological and pathological processes. Glycosylated proteins or glycoproteins comprise N-linked and O-linked oligosaccharides. O-glycosylation is the most common type of protein glycosylation. Here, glycans attach to the oxygen atom of the hydroxyl groups of Serine or Threonine residues. O-linked glycosylation occurs later in protein processing,...
01:03Basal Lamina are the Specialized Form of ECM
The basal lamina is a thin extracellular layer that lies underneath the cells and separates them from other tissues. The three layers of the basal lamina are lamina lucida, lamina densa and lamina reticularis. The basal lamina, a mixture of glycoproteins and collagen, provides an attachment site for the epithelium, separating it from underlying connective tissue. The framework of basal lamina has other essential proteins such as laminins mesh, perlecan, entactin, and type IV collagen.
Proteins...
Proteins...
01:21Matrix Proteoglycans and Glycoproteins
Proteoglycans are extensively glycosylated proteins, commonly found in the extracellular matrix, interwoven with collagen fibers. Hyaline cartilage, the most common type of cartilage in the body, consists of short and dispersed collagen fibers associated with large amounts of proteoglycans. These proteoglycans have long negative charges that attract cations, which in turn attract water molecules. This influx of ions and water molecules swells up the proteoglycan like a water-soaked gel that can...
01:05Type IV Collagen of Basal Lamina
Type IV collagen is a 400 nm long, network-forming collagen that acts as a barrier between the epithelial and endothelial cells. Type IV collagen forms the backbone of the basement membrane by scaffolding with laminin, entactin, proteoglycans, and fibronectin. Apart from rendering structural support to the basement membrane, it also helps entail signaling potentials necessary for both pathological and physiological functions.
A type IV collagen molecule has six alpha chains which can exist in...
A type IV collagen molecule has six alpha chains which can exist in...
01:23Glycosaminoglycans
Glycosaminoglycans (GAGs), also known as mucopolysaccharides, are long and linear polymers comprising of specific repeating disaccharides - the amino sugar that can be N-acetylglucosamine or N-acetylgalactosamine, and a uronic acid that is usually glucuronic acid or iduronic acid.
GAGS are found in the extracellular matrix of vertebrates, invertebrates, and bacteria. Due to their polar nature they attract water, and serve as excellent lubricants or shock absorbers in an animal body.
Hyaluronic...
GAGS are found in the extracellular matrix of vertebrates, invertebrates, and bacteria. Due to their polar nature they attract water, and serve as excellent lubricants or shock absorbers in an animal body.
Hyaluronic...