HSF1 Acetylation Modulation for Proteostasis Balance
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Solution Overview
Problem
Current therapeutic approaches are inadequate for treating conditions associated with proteostasis dysfunction and altered induction of heat shock proteins, which are implicated in various diseases including cancer, neurodegenerative diseases, and cardiovascular diseases.
Innovation Solution
Modulating the activity of heat shock transcription factor 1 (HSF1) by inhibiting or promoting the acetylation of specific lysine residues in its DNA binding domain using agents such as sirtuins, sirtuin activating agents, or histone acetyltransferase inhibitors, to regulate protein homeostasis and the heat shock response.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the heat shock response is activated to protect cells against protein misfolding and aggregation, then cellular protection is improved, but cell growth and division are inhibited due to accumulation of large amounts of HSPs
Solution Approach 1:
The patent employs dynamic regulation of HSF1 activity through acetylation and deacetylation modifications. SIRT1 deacetylase dynamically removes acetyl groups from HSF1, creating a reversible switch that allows the cell to adjust HSP production levels based on physiological needs, thereby balancing protection with growth requirements
Solution Approach 2:
The patent changes the chemical modification state of HSF1 (acetylation level) as a regulatory parameter. By controlling the acetylation status of HSF1 through SIRT1 activity, the system can modulate HSF1's transcriptional activity and DNA binding affinity, thereby controlling HSP expression levels to balance cellular protection with growth
2Reliability
If HSF1 activity is increased to enhance heat shock protein expression for protecting against stress conditions, then cellular stress resistance is improved, but protein homeostasis imbalance occurs leading to detrimental effects on cell growth
Solution Approach 1:
The patent implements a feedback mechanism where SIRT1 activity responds to cellular conditions to regulate HSF1 acetylation status. This feedback loop ensures that HSP expression is appropriately modulated based on cellular stress levels and metabolic state, maintaining protein homeostasis while providing stress protection when needed
Solution Approach 2:
The system uses dynamic reversible acetylation-deacetylation of HSF1 to adjust protein homeostasis. This dynamic modification allows the cell to flexibly respond to changing conditions, preventing both excessive and insufficient HSP production that would disrupt protein homeostasis
Data Source
AI summary
The present invention is directed to methods of modulating HSF1 activity comprising modifying the acetylation of the DNA binding domain of the HSF1.