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Expression of the EMILIN-1 gene during mouse development
Paola Braghetta1, Alessandra Ferrari, Paola de Gemmis
1Department of Histology, Microbiology and Medical Biotechnologies, University of Padova, Via G Colombo, 3, 35121, Padua, Italy.
Matrix Biology : Journal of the International Society for Matrix Biology
|December 12, 2002
Summary
Extracellular matrix gene EMILIN-1 (Extracellular matrix metalloproteinase inducer-1) is expressed early in mouse development, particularly in the placenta and developing organs. Its expression suggests roles in placenta formation, organogenesis, and connective tissue development.
Area of Science:
- Developmental Biology
- Extracellular Matrix Biology
- Gene Expression Analysis
Background:
- EMILIN-1 is the first identified member of a novel extracellular matrix gene family.
- Understanding its expression pattern is crucial for elucidating its biological functions.
Purpose of the Study:
- To investigate the spatiotemporal expression of EMILIN-1 during mouse embryonic development.
- To identify potential roles of EMILIN-1 in placental and organ development.
Main Methods:
- Reverse Transcription Polymerase Chain Reaction (RT-PCR) for mRNA detection.
- In situ hybridization for precise localization of gene expression.
Main Results:
- EMILIN-1 mRNA detected in morula and blastocyst stages.
- Early expression observed in the ectoplacental cone, extraembryonic visceral endoderm, and allantois.
- Strong expression in placental cells (trophoblast giant cells, spongiotrophoblast) until 11.5 days.
- In the embryo, expression found in blood vessels, perineural mesenchyme, and somites at 8.5 days.
- Later expression in mesenchymal components of developing organs (lung, liver) and condensations (limb bud, branchial arches).
- Widespread distribution in interstitial connective tissue and smooth muscle tissues in late gestation.
Conclusions:
- EMILIN-1 expression pattern suggests a role in placenta formation and early organogenesis.
- EMILIN-1 may also be involved in the development and maintenance of interstitial connective tissue and smooth muscle tissues.