Steven Austad Comparative Biology Stress Inoculation Protocol

Gold standard non-invasive metric of in vivo cellular oxidative DNA damage and nucleotide transversion risk.

Direct cytogenetic quantification of chromosome breakage and whole-chromosome loss in peripheral blood lymphocytes.

Ultra-sensitive biomarker of active double-strand DNA breaks (DSBs) within peripheral blood mononuclear cells.

High-throughput quantitative fluorescence in situ hybridization measuring median and individual chromosomal telomere lengths.

The critical subset of uncapped telomeres that triggers irreversible p53-dependent senescence regardless of mean length.

Measures enzymatic telomerase reverse transcriptase activity in isolated peripheral blood mononuclear cells.

Quantifies the current instantaneous rate of biological aging (years of biological decay per calendar year).

The premier epigenetic predictor of all-cause mortality, cardiovascular disease, and healthy healthspan duration.

Clinical surrogate for one-carbon metabolism, cellular methylation potential, and S-adenosylmethionine (SAM) availability.

Molecular chaperone reflecting cellular proteostatic reserve, misfolded protein buffering, and thermal adaptation.

Major circulating advanced glycation end-product (AGE) causing irreversible protein cross-linking and vascular stiffness.

Extracellular molecular chaperone that binds misfolded, hydrophobic-exposed proteins to prevent aggregation.

Physiological hormonal switch governing hepatic and systemic autophagic flux vs anabolic suppression.

Autophagy substrate that accumulates intracellularly when autophagic clearance and lysosomal fusion are impaired.

Direct biochemical marker of autophagosome membrane elongation and formation in circulating lymphocytes.

Primary clinical indicator of hyperinsulinemia, basal mTORC1 stimulation, and peripheral insulin resistance.

Validated index calculating hepatic insulin resistance: (Fasting Glucose mg/dL × Fasting Insulin µIU/mL) / 405.

Quantifies postprandial glucose spikes and glycemic fluctuations driving endothelial oxidative stress.

Evaluates mitochondrial density and fatty acid oxidation capacity by measuring blood lactate during sustained aerobic work.

Gold-standard systemic metric of mitochondrial respiratory capacity and cardiovascular oxygen delivery.

Essential electron transporter in mitochondrial electron transport chain Complexes I/II to III.

CDKN2A tumor suppressor protein and gold-standard biomarker of human biological cellular senescence burden.

Multi-analyte panel quantifying paracrine senescent secretion: IL-6, TNF-a, MMP-3, and PAI-1.

Core component of the senescence secretome, driving tissue fibrosis, arterial thrombosis, and microvascular decay.

Bone marrow-derived progenitor cells responsible for ongoing vascular re-endothelialization and capillary repair.

Clinical surrogate for resident muscle satellite cell regenerative pool, sarcopenia resistance, and contractile mass.

Surrogate marker of hematopoietic bone marrow stem cell responsiveness and active erythropoietic turnover.

Gold-standard continuous metric of parasympathetic vagal nerve traffic, neuro-autonomic resilience, and baroreflex tone.

Quantifies hypothalamic-pituitary-adrenal (HPA) axis neuroendocrine signaling and circadian clock synchronization.

Circulating endothelial activation marker reflecting deregulated neuro-vascular intercellular signaling.

The premier systemic clinical biomarker of vascular inflammaging, hepatic acute phase response, and cardiovascular risk.

NMR-derived aggregate signal of N-acetylglucosamine residues on acute phase proteins; far lower intra-individual volatility than CRP.

Upstream cytokine trigger of hepatic CRP synthesis and central mediator of the inflammaging cascade.

Mathematical index quantifying both the richness and evenness of gut bacterial species from metagenomic sequencing.

Keystone mucin-degrading bacterium essential for colonic mucosal barrier thickness, GLP-1 secretion, and metabolic health.

Biomarkers of intestinal tight junction disassembly and systemic endotoxemia caused by gram-negative bacterial translocation.