Related Experiment Videos
Changes in glycosaminoglycan expression in the rat developing intestine.
F Bouziges1, P Simon-Assmann, P Simo
1INSERM Unité 61, Biologie Cellulaire et Physiopathologie Digestive, Strasbourg, France.
Cell Biology International Reports
|February 1, 1991
Summary
Glycosaminoglycan (GAG) synthesis in developing rat intestines peaks during fetal growth. Alterations in hyaluronic acid (HA) and heparan sulfate (HS) and chondroitin sulfate (CS) during development are crucial for intestinal development.
Area of Science:
- Developmental Biology
- Biochemistry
- Extracellular Matrix Biology
Background:
- Glycosaminoglycans (GAGs) are vital components of the extracellular matrix, playing critical roles in tissue development and morphogenesis.
- The developing intestine undergoes significant growth and differentiation, necessitating dynamic changes in its microenvironment.
Purpose of the Study:
- To investigate the synthesis and composition of glycosaminoglycan (GAG) chains during rat intestinal development.
- To understand how GAG alterations contribute to the intestinal extracellular microenvironment and support growth and differentiation.
Main Methods:
- Intestinal segments from rats at various developmental stages were incubated with 3H-glucosamine and 35S-sulfate.
- Quantification of total GAGs (3H-GAGs) and sulfated GAGs (35S-GAGs) was performed.
- Characterization of individual GAG species, including hyaluronic acid (HA), heparan sulfate (HS), and chondroitin sulfate (CS), was conducted.
Main Results:
- GAG synthesis exhibited a clear age-dependence, with a broad maximum during the fetal period.
- Hyaluronic acid (HA) synthesis decreased with age.
- Undersulfated HS molecules were produced during embryonic development, and HA and HS molecules shifted to lower hydrodynamic forms postnatally.
Conclusions:
- The quantitative and qualitative modifications in HA, HS, and CS synthesis during intestinal development are significant.
- These GAG alterations are postulated to be crucial for establishing an age-specific extracellular microenvironment that facilitates intestinal growth and differentiation.