Related Experiment Videos
Involvement of cytoskeletal structures in nerve-growth-factor-mediated induction of ornithine decarboxylase
The Biochemical Journal
|January 15, 1979
Abstract:
Induction of ornithine decarboxylase elicited in response to nerve-growth factor in target organs is greatly decreased by preincubation of these tissues with cytoskeletal poisons such as vinblastine, diamide, cytochalasin B and colchicine. These results are interpreted as evidence for the involvement of receptor-associated cytoskeletal structures in mediating the nerve-growth-factor-specific induction of ornithine decarboxylase.
Insights
Nerve growth factor (NGF) induces ornithine decarboxylase (ODC) in tissues. Cytoskeletal poisons disrupt this induction, suggesting a role for cytoskeletal structures in mediating NGF signaling for ODC production.
Area of Science:
- Cell biology
- Molecular biology
- Neuroscience
Background:
- Nerve growth factor (NGF) plays a crucial role in neuronal development and survival.
- Ornithine decarboxylase (ODC) is a key enzyme in polyamine synthesis, essential for cell growth and proliferation.
- The precise mechanisms by which NGF induces ODC are not fully understood.
Purpose of the Study:
- To investigate the role of cytoskeletal elements in mediating NGF-induced ornithine decarboxylase (ODC) expression.
- To determine if cytoskeletal integrity is required for the signaling pathway initiated by NGF.
Main Methods:
- Treatment of target organs with NGF.
- Preincubation of tissues with various cytoskeletal poisons (vinblastine, diamide, cytochalasin B, colchicine).
- Measurement of ornithine decarboxylase activity.
Main Results:
- Preincubation with cytoskeletal poisons significantly reduced NGF-induced ODC activity.
- Specific poisons targeting microtubules (colchicine, vinblastine) and microfilaments (cytochalasin B) demonstrated inhibitory effects.
- Diamide, which affects glutathione levels and protein cross-linking, also inhibited ODC induction.
Conclusions:
- Cytoskeletal structures are involved in the signaling pathway of NGF-induced ornithine decarboxylase.
- Receptor-associated cytoskeletal elements likely play a critical role in mediating the effects of NGF on ODC induction.