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Related Experiment Video

Updated: Jun 23, 2025

Inducing Apical Periodontitis in Mice

Inducing Apical Periodontitis in Mice

Published on: August 6, 2019

Type VI Collagen Deficiency Causes Enhanced Periodontal Tissue Destruction.

T Komori¹, V Kram¹, S Perry¹

¹Molecular Biology of Bones and Teeth Section, National Institute of Dental and Craniofacial Research, Department of Health and Human Services, National Institutes of Health, Bethesda, MD, USA.

Journal of Dental Research

|June 24, 2024

Summary

Type VI collagen (COL6) is crucial for periodontal ligament (PDL) health. COL6 deficiency worsens periodontitis by impairing tissue structure and increasing inflammation.

Keywords:

biomechanics bone loss extracellular matrix inflammation periodontal ligament single-cell RNAseq

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Area of Science:

Biomaterials Science
Connective Tissue Biology
Oral Biology

Background:

The periodontal ligament (PDL) is vital for tooth support, comprising specialized cells and extracellular matrix (ECM).
Type VI collagen (COL6) is essential for tissue integrity but its role in the PDL is poorly understood.

Purpose of the Study:

To investigate the function of COL6 in the periodontal ligament.
To determine the impact of COL6 deficiency on PDL structure and periodontitis progression.

Main Methods:

Utilized COL6-deficient mice and ligature-induced periodontitis (LIP) model.
Analyzed PDL structure, bone loss, and fibroblast gene expression related to ECM organization and inflammation.

Main Results:

COL6 deficiency led to impaired PDL fibrillogenesis and exacerbated bone loss in LIP.
COL6-deficient PDL fibroblasts showed reduced expression of ECM organization genes and impaired migration/proliferation.
COL6 deficiency increased fibroblast inflammatory response in the PDL.

Conclusions:

COL6 is critical for maintaining PDL structure and function.
COL6 influences fibroblast behavior, ECM organization, and immune response in periodontitis.
Understanding COL6's role advances knowledge of PDL maturation and periodontal disease mechanisms.