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Genetic change can propagate through molecular systems

GMOs, plant biology
and redox balance

See how a genetic modification and herbicide context can be evaluated across connected plant pathways, from C1 metabolism to glutathione and oxidative stress.

The central question

Can a genetic change produce a systems-level difference in plant biology?

The supplied GMO analysis compares redox balance in organic/glyphosate-sensitive soybean and glyphosate-resistant soybean. The reported GSH/GSSG ratios show a large difference between the compared plant types in both the in-vivo and in-silico results.

Evidence from the published study

Glutathione redox balance differs across the comparison

GSH/GSSG is presented as a redox-related readout. Higher values indicate a higher reduced-to-oxidized glutathione ratio within the reported comparison.

Ayyadurai et al., 2016
GSH/GSSG ratios: in vivo, organic 9.9 and RRS 3.7; in silico, organic 9.7 and RRS 3.9.
AnalysisOrganic
GSH/GSSG
RRS
GSH/GSSG
Organic/RRS × 100
Reported in study
In vivo9.93.7268%
In silico9.73.9249%
Source: In-Silico Analysis & In-Vivo Results Concur on Glutathione Depletion in Glyphosate Resistant GMO Soy, Advancing a Systems Biology Framework for Safety Assessment of GMOs
V. A. Shiva Ayyadurai1*, Michael Hansen2, John Fagan3, Prabhakar Deonikar1.
The 268% and 249% entries express Organic/RRS × 100, rounded; they are not percentage increases. The corresponding ratios are approximately 2.68 and 2.49.
Systems biology context

A genetic change can move through connected plant processes

The research program presented on the Integrative Systems publications page links genetic perturbation to C1 metabolism, formaldehyde handling, glutathione biosynthesis, redox balance and oxidative stress. The page below presents that logic as a pathway of questions for exploration.

GODS™ systems map

  1. Genetic change alters an engineered plant pathway.
  2. Metabolic network changes how C1 metabolism and related reactions are balanced.
  3. Redox biomarkers shift, including GSH/GSSG in the supplied comparison.
  4. Stress response may show altered formaldehyde handling and glutathione demand.
  5. Plant phenotype and safety questions require targeted in-vitro and in-vivo testing.

What the table supports

The compared plant types show materially different GSH/GSSG values in both reported modes of analysis. That pattern supports testing genetic background as a biological variable in GMO assessment.

The table alone does not identify which molecular step caused the difference, establish harm in humans, or generalize to every GMO.

Published research from the systems biology program

Five papers build the GMO evidence pathway

In-silico and in-vivo comparison

In-Silico Analysis & In-Vivo Results Concur on Glutathione Depletion in Glyphosate Resistant GMO Soy

Extends the C1 model with glutathione biosynthesis and glyphosate catabolism, then compares predicted GSH/GSSG results with reported greenhouse data.

Read the paper summary →
GMO systems model

Do GMOs Accumulate Formaldehyde and Disrupt Molecular Systems Equilibria?

Models C1 metabolism and oxidative stress in glyphosate-resistant soybean and reports predicted formaldehyde accumulation with faster glutathione depletion under oxidative stress.

Read the paper summary →
Integrated systems model

Integrative Modeling of Oxidative Stress and C1 Metabolism Reveals Upregulation of Formaldehyde and Downregulation of Glutathione

Connects oxidative stress with C1 metabolism to examine how disturbances propagate to formaldehyde, glutathione and redox homeostasis.

Read the paper summary →
Foundational model

In Silico Modeling of C1 Metabolism

Develops a dynamic model of interconnected C1 pathways, including the folate and methionine cycles and glutathione biosynthesis.

Read the paper summary →
Pathway discovery

Discovery of Key Molecular Pathways of C1 Metabolism and Formaldehyde Detoxification in Maize

Maps key plant C1-metabolism and formaldehyde-detoxification pathways that provide the biological foundation for the later computational models.

Read the paper summary →
Assessment framework

Move from “substantial equivalence” to measurable systems evidence

Use the table as a starting point for a transparent comparison. A complete assessment should state the genetic construct, plant variety, herbicide treatment, sampling time, dose or field exposure, assay method, replicates, uncertainty and whether the endpoint changed because of genotype, treatment or their interaction.

Sources

  1. Ayyadurai VA, Hansen M, Fagan J, Deonikar P. In-Silico Analysis & In-Vivo Results Concur on Glutathione Depletion in Glyphosate Resistant GMO Soy, Advancing a Systems Biology Framework for Safety Assessment of GMOs.
  2. International Center for Integrative Systems publications page.
  3. Do GMOs Accumulate Formaldehyde and Disrupt Molecular Systems Equilibria?.
  4. Integrative Modeling of Oxidative Stress and C1 Metabolism Reveals Upregulation of Formaldehyde and Downregulation of Glutathione.
  5. In Silico Modeling of C1 Metabolism.
  6. Discovery of Key Molecular Pathways of C1 Metabolism and Formaldehyde Detoxification in Maize.

The publication summaries describe model predictions and reported concordance with experimental data. They remain clearly labeled as research findings and model outputs.

Explore the GMO systems model

Inspect compounds, pathways, biological processes and biomarkers in GODS™.

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