Related Experiment Videos
TGF-beta latency-associated peptides (LAPs) in human dentin matrix and pulp
A J Sloan1, R Moseley, K Dobie
1School of Dentistry, University of Birmingham, St Chads Queensway, Birmingham, UK. a.j.sloan@bham.ac.uk
Connective Tissue Research
|December 20, 2002
Summary
Transforming growth factor-beta (TGF-beta) latency-associated peptides (LAPs) are present in tooth cells and pulp, but not mineralized dentin. Their expression in healthy and carious teeth may regulate TGF-beta activity and tissue response to injury.
Area of Science:
- Biochemistry
- Cell Biology
- Dental Research
Background:
- Transforming growth factor-beta (TGF-beta) in dentin matrix is bioactive but its activity can be modulated by latency-associated peptides (LAPs).
- Understanding the localization and expression of TGF-beta LAPs is crucial for comprehending TGF-beta signaling in dental tissues.
Purpose of the Study:
- To investigate the expression and localization of TGF-beta 1, -beta 2, and -beta 3 LAPs in sound and carious human teeth.
- To determine if LAP presence differs between healthy and decayed dental tissues.
Main Methods:
- Human teeth (sound and carious) were fixed and processed immediately after extraction.
- Immunohistochemical staining using rabbit polyclonal antibodies against TGF-beta LAPs was performed.
- Soluble dentin matrix fractions and pulpal extracellular matrix (ECM) were prepared, purified, Western blotted, and probed with LAP antibodies.
Main Results:
- All three TGF-beta LAPs were detected in odontoblasts, pulp cells, and predentin.
- No TGF-beta LAP staining was observed in the mineralized dentin matrix.
- Similar expression patterns of TGF-beta LAPs were found in both sound and carious teeth.
Conclusions:
- TGF-beta LAPs are expressed in the cellular and pulpal matrix components of human teeth, irrespective of caries presence.
- The presence of TGF-beta LAPs in these locations suggests a role in regulating TGF-beta activity within dental tissues.
- Understanding LAP expression is important for modulating tissue responses to injury and disease in teeth.