SAGA Complex Disruption for Chronological Lifespan Control
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Solution Overview
Problem
Current methods fail to effectively address the balance between cell growth and longevity, particularly in controlling chronological lifespan, as existing technologies do not adequately modulate the acetylation status of histone H3 Lysine 18 (H3K18), which is central to this balance.
Innovation Solution
Disrupting the function of the Spt-Ada-Gcn5-Acetyltransferase (SAGA) complex by targeting genes such as Spt7 and Spt8, or their homologues, to modulate H3K18 acetylation status, thereby influencing chronological lifespan, and using test compounds to identify potential modulators of this process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If the SAGA complex function is disrupted to modulate H3K18 acetylation status, then chronological lifespan is increased, but cell growth is affected
Solution Approach 1:
The patent applies parameter changes by specifically targeting the acetylation status of H3K18 through SAGA complex disruption. This selective modification of a specific histone parameter (H3K18 acetylation) allows the invention to extend chronological lifespan while minimizing broader effects on cell growth, as the disruption is focused on a specific epigenetic parameter rather than global cellular functions
Solution Approach 2:
The invention employs local quality by targeting specific genes (Spt7, Spt8) and their homologues within the SAGA complex, rather than disrupting the entire complex uniformly. This localized approach allows selective modulation of H3K18 acetylation at specific genomic loci, enabling lifespan extension while preserving essential cell growth functions that depend on other SAGA activities
2Adaptability or versatility
If existing technologies are used to control chronological lifespan, then general cell aging is addressed, but specific modulation of H3K18 acetylation status is not achieved
Solution Approach 1:
The patent introduces test compounds as intermediaries that specifically target and modulate the SAGA complex function. These compounds act as mediators between the researcher and the H3K18 acetylation status, enabling precise control and measurement of acetylation changes. The compounds provide a bridge that allows selective intervention in the SAGA-H3K18 axis without affecting other cellular processes
Solution Approach 2:
The invention implements feedback mechanisms by using test compounds that respond to and modulate H3K18 acetylation status in real-time. The screening methods allow detection of acetylation changes, which then inform further compound application and optimization, creating a feedback loop that progressively refines control over the acetylation status and chronological lifespan
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach allows for the identification and modulation of chronological lifespan, providing a method to increase or decrease cell longevity by altering H3K18 acetylation, and diagnosing disorders associated with changes in chronological lifespan.
Implementation Method 1
H3K18 acetylation, is central to a mechanism that controls the balance between cell growth and longevity
Data Source
Figure 1a~1c
Figure 1d~1f
Figure 1g~1h
AI summary
The present invention relates to a method for increasing the chronological lifespan of a cell comprising disrupting the function of at least one of the SAGA1 SLIK and/or SALSA complexes in said cell.