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Published on: March 17, 2014
A nuclear odyssey: fibroblast growth factor-2 (FGF-2) as a regulator of nuclear homeostasis in the nervous system
Benjamin Förthmann1, Claudia Grothe, Peter Claus
1Department of Neuroanatomy, Institute of Neuroanatomy, Hannover Medical School, OE 4140, Carl-Neuberg-Str.1, 30625, Hannover, Germany.
Abstract:
Nuclear localization of classical growth factors is a well-known phenomenon but still remains a molecular and cellular conundrum. Fibroblast growth factor-2 (FGF-2) is an excellent example of a protein which functions as an extracellular molecule involved in canonical receptor tyrosine kinase signaling as well as displaying intracellular functions. Paracrine and nuclear functions are two important sides of the same protein. FGF-2 is expressed in isoforms with different molecular weights from one mRNA species. In rodents, all of these isoforms become imported to the nucleus. In this review, we discuss structural and functional aspects of FGF-2 isoforms in the nervous system. The nuclear odyssey of FGF-2 is reflected by nuclear dynamics, localization to nuclear bodies such as nucleoli, binding to chromatin and engagement in various protein interactions. Recently discovered molecular partnerships of the isoforms shed light on their nuclear functions, thereby greatly extending our knowledge of the multifaceted functions of FGF-2.
Insights
Fibroblast growth factor-2 (FGF-2) isoforms translocate to the nucleus, where they interact with chromatin and proteins. This review explores their structural and functional roles within the nervous system, revealing new insights into FGF-2
Area of Science:
- Molecular Biology
- Cell Biology
- Neuroscience
Background:
- Nuclear localization of growth factors is a known but poorly understood phenomenon.
- Fibroblast growth factor-2 (FGF-2) exhibits both extracellular and intracellular functions.
- FGF-2 is expressed in various isoforms from a single mRNA species.
Purpose of the Study:
- To review the structural and functional aspects of FGF-2 isoforms in the nervous system.
- To elucidate the nuclear functions of FGF-2 isoforms.
- To highlight recent discoveries regarding FGF-2's molecular partnerships.
Main Methods:
- Literature review focusing on FGF-2 nuclear dynamics.
- Analysis of FGF-2 localization within nuclear bodies (e.g., nucleoli).
- Examination of FGF-2 interactions with chromatin and other proteins.
Main Results:
- All FGF-2 isoforms in rodents are imported into the nucleus.
- FGF-2 exhibits dynamic nuclear behavior, including chromatin binding.
- New molecular partnerships of FGF-2 isoforms have been identified.
Conclusions:
- FGF-2's nuclear localization is a significant aspect of its function.
- Understanding FGF-2 nuclear dynamics and interactions is crucial for its multifaceted roles.
- Recent findings expand our knowledge of FGF-2's complex functions in the nervous system.
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