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Multiplicity generates diversity in the retinoic acid signalling pathways
1Laboratoire de Génétique Moléculaire des Eucaryotes du CNRS, U/184 de Biologie Moléculaire et de Génie Génétique de l'INSERM, Faculté de Médecine, Strasbourg, France.
Trends in Biochemical Sciences
|October 1, 1992
Summary
The retinoid signaling system is complex, involving various retinoic acid forms, binding proteins, and receptors. These interactions create diverse combinatorial effects, explaining the pleiotropic actions of retinoids.
Area of Science:
- Molecular Biology
- Cell Signaling
- Endocrinology
Background:
- Retinoids, including retinoic acid, are crucial signaling molecules.
- The retinoid signaling pathway is known to regulate various cellular processes.
- Understanding the complexity of this system is essential for deciphering retinoid functions.
Purpose of the Study:
- To elucidate the sources of complexity within the retinoid signaling system.
- To explore the combinatorial interactions that contribute to retinoid signaling diversity.
- To provide a framework for understanding the pleiotropic effects of retinoids.
Main Methods:
- Analysis of retinoic acid forms and their binding proteins.
- Investigation of nuclear retinoic acid receptor (RAR) interactions.
- Examination of retinoic acid response elements (RAREs).
Main Results:
- Identified multiple retinoic acid forms, cytoplasmic binding proteins, and nuclear receptors.
- Demonstrated polymorphic nature of retinoic acid response elements.
- Revealed heterodimeric interactions between RARs and other nuclear receptors.
Conclusions:
- The complexity of retinoid signaling arises from multiple molecular components and interactions.
- Heterodimeric interactions and polymorphic response elements generate significant diversity.
- A combinatorial signaling network likely underlies the pleiotropic effects of retinoids.