Epigenohormesiomics

Epigenohormesiomics

Definition

Epigenohormesiomics is the systematic, omics-scale study of hormetic phenomena operating through and upon the epigenome — the biphasic, concentration-dependent adaptive responses in which sub-threshold stress stimuli induce beneficial epigenetic reprogramming, whereas excessive or chronic stress drives maladaptive epigenetic dysregulation, entrenchment of pathological gene expression states, and accelerated epigenetic aging. It holds as its central premise that the epigenome is the primary molecular memory and integration layer of hormetic experience: it encodes, stores, and propagates the adaptive consequences of hormetic stress exposures across cellular generations, translating transient concentration signals into durable changes in chromatin architecture, DNA methylation landscapes, histone modification patterns, and non-coding RNA regulatory networks. Epigenohormesiomics maps the full epigenomic consequences of hormetic stimuli at omics resolution, constructing a systems-level understanding of how calibrated stress drives beneficial epigenetic reprogramming across cell types, tissues, organisms, and lifespans.

Core Principle

The foundational postulate of Epigenohormesiomics is: the epigenome is the molecular recorder and executor of hormetic adaptation, whose concentration-sensitive reprogramming determines the lasting regulatory consequences of stress exposure across the lifespan and across generations. Epigenetic marks — DNA methylation, histone acetylation, histone methylation, chromatin accessibility, and non-coding RNA expression — are exquisitely sensitive to the quantitative parameters of upstream hormetic signals, including ROS concentration, NAD⁺/NADH ratio, acetyl-CoA availability, SAM concentration, and the activity of stress-responsive epigenetic enzymes such as sirtuins, TET demethylases, PRC2, and HDACs. The concentration-dependent, biphasic regulation of these epigenetic effectors by hormetic stress constitutes the molecular mechanism through which hormesis achieves its durable, organism-wide adaptive consequences.

Scope

Epigenohormesiomics encompasses:

• DNA methylation hormesiomics: genome-wide, base-resolution characterization of the concentration-dependent, biphasic effects of hormetic stimuli on DNA methylation landscapes — including the activation of TET-mediated demethylation at longevity-associated loci at low stress doses and the entrenchment of aberrant hypermethylation and hypomethylation patterns at high or chronic stress doses — and their relationship to epigenetic aging clocks.
• Histone modification hormesiomics: omics-scale mapping of the biphasic, concentration-dependent effects of hormetic signals on histone acetylation (via sirtuin and HDAC regulation), histone methylation (via PRC2 and KDM regulation), and histone phosphorylation patterns — and how these modifications collectively orchestrate adaptive versus maladaptive transcriptional reprogramming.
• Chromatin accessibility hormesiomics: systematic, ATAC-seq-based characterization of the concentration-dependent opening and closing of chromatin regulatory regions in response to hormetic stress, identifying hormesis-specific enhancer landscapes, transcription factor binding site accessibility changes, and their downstream gene regulatory consequences.
• Non-coding RNA hormesiomics: omics-resolution profiling of the biphasic, concentration-dependent regulation of microRNAs, long non-coding RNAs, and circular RNAs by hormetic stimuli — and their roles as epigenetic signal transducers amplifying, attenuating, or propagating hormetic stress responses across tissues and cell populations.
• Sirtuin hormesiomics: systematic characterization of the concentration-dependent, biphasic regulation of sirtuin family deacylases (SIRT1-7) by NAD⁺ availability and hormetic stress — mapping their omics-scale epigenetic, metabolic, and transcriptional outputs across the full range of physiologically and pharmacologically relevant NAD⁺ concentrations.
• Epigenetic clock hormesiomics: investigation of how hormetic interventions — caloric restriction, exercise, cold exposure, pharmacological senolytics, NAD⁺ precursors — reset or decelerate epigenetic aging clocks (Horvath, GrimAge, DunedinPACE) through concentration-dependent epigenetic reprogramming, and how these effects can be optimized within a concentratiomics framework.
• Transgenerational epigenohormesiomics: systematic characterization of how hormetic epigenetic reprogramming induced in parental generations is transmitted to offspring through germline epigenetic inheritance, including the identification of the specific epigenetic marks, small RNA species, and chromatin states that serve as transgenerational carriers of hormetic adaptive memory.
• Aging epigenohormesiomics: omics-scale investigation of how the aging Dosagiome erodes epigenetic hormetic competence — blunting sirtuin activity through NAD⁺ decline, corrupting DNA methylation landscapes, increasing chromatin rigidity, and progressively narrowing the epigenetic hormetic window — thereby converting hormetic stimuli from drivers of adaptive reprogramming into triggers of epigenetic damage and entrenchment of the aging epigenetic state.

Epigenohormesiomics occupies a uniquely central position within the broader hormesiomics framework because the epigenome serves as the molecular integration layer through which all hormetic signals — mitochondrial, neural, immunological, metabolic — are translated into durable, organism-wide regulatory consequences. By characterizing the concentration-dependent epigenomic consequences of hormetic stress at omics resolution, Epigenohormesiomics provides the mechanistic foundation for understanding how lifestyle interventions, pharmacological compounds, and environmental exposures achieve lasting effects on biological age, disease risk, and organismal longevity. It further supplies the quantitative epigenomic principles necessary for the rational design of epigenetic reprogramming strategies — including partial reprogramming approaches targeting the Yamanaka factors — as precision longevity interventions calibrated within the hormetic Dosagiome.

Coined by

Jong Bhak, KOGIC / AgingLab, UNIST, Republic of Korea (2025)

See also

Hormesiomics · Mitohormesiomics · Neurohormesiomics · Dosagiomics · Concentratiomics · Dosagiome · Epigenome · DNA Methylation · Histone Modification · Sirtuins · NAD⁺ · Epigenetic Clocks · Partial Reprogramming · GeroIndex · Gerostasis ·  Systems Biology