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Bone development and inflammatory disease is regulated by AP-1 (Fos/Jun)
1BBVA Foundation-CNIO Cancer Cell Biology Program, Spanish National Cancer Centre (CNIO), c/Melchor Fernández Almagro 3, E-28029 Madrid, Spain. ewagner@cnio.es
Annals of the Rheumatic Diseases
|December 10, 2009
Summary
Fos and Jun proteins, key components of the AP-1 transcription factor, regulate bone development and inflammatory skin diseases like psoriasis. Their roles in osteoblast/osteoclast function and cytokine signaling are crucial for cellular processes.
Area of Science:
- Molecular Biology
- Cellular Biology
- Developmental Biology
Background:
- Fos and Jun proteins are integral components of the AP-1 transcription factor complex, a critical regulator of diverse cellular functions.
- The AP-1 complex, including Fos and Jun proteins, plays a significant role in cellular processes, particularly in bone development and inflammatory responses.
Purpose of the Study:
- To summarize the critical functions of Fos proteins, specifically Fra-1 and Fra-2, in bone development.
- To elucidate the role of Jun proteins in regulating cytokine expression and their involvement in inflammatory skin diseases such as psoriasis.
- To discuss the utility of Jun-dependent mouse models for psoriasis in preclinical anti-angiogenic therapy studies.
Main Methods:
- Review of existing literature on Fos and Jun protein functions.
- Analysis of molecular mechanisms underlying skin inflammation.
- Examination of cytokine expression pathways regulated by Jun proteins.
- Evaluation of Jun-dependent mouse models for psoriasis research.
Main Results:
- Fos proteins, particularly Fra-1 and Fra-2, are essential for osteoblast and osteoclast functions and regulate cytokine signaling during bone development.
- Jun proteins control the expression of various cytokines (e.g., G-CSF, IL-6, TNF-alpha) through transcriptional and posttranscriptional mechanisms.
- Jun proteins are implicated in the pathogenesis of inflammatory skin diseases like psoriasis.
Conclusions:
- Fos and Jun proteins are vital regulators in bone development and inflammatory processes.
- Understanding Jun protein's role in cytokine regulation provides insights into inflammatory skin diseases.
- Jun-dependent mouse models offer a valuable platform for preclinical research in anti-angiogenic therapies for psoriasis.
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