Mutagenicity & Genotoxicity Screening

Q: What is genotoxicity screening in zebrafish?

Zebrafish genotoxicity screening Zebrafish embryos or larvae are used to identify whether a test substance causes DNA damage, chromosomal damage, oxidative stress, apoptosis, or associated toxicity responses in vivo .

Q: Can zebrafish assays replace the Ames test?

Not really. Zebrafish assays are useful as other in vivo screening methods. They can supplement early risk assessment in conjunction with established assays such as Ames test, in vitro micronucleus assay and mammalian in vivo genotoxicity investigations.

Q: What are the core assays in your platform?

The core assays include: Dose range‑finding and general toxicity assessment Zebrafish comet assay Zebrafish micronucleus assay Additional mechanism‑focused assays include γH2AX, p53/DNA repair markers, oxidative stress, and apoptosis analysis.

Q: What kind of samples can be tested?

We can evaluate small molecule compounds, chemical ingredients, cosmetic ingredients, agrochemicals, environmental samples, nanomaterials, natural extracts and formulation components.

Q: How are test concentrations chosen?

Concentrations are selected on the basis of solubility, feasibility of exposure, toxicity data available and dosage range‑finding outcomes. The purpose is to assess biologically relevant doses without significant general toxicity.

Overview Services Workflow Features FAQ

Rapid In Vivo Screening for DNA Damage and Early Mutagenic Risk

Our zebrafish mutagenicity and genotoxicity screening services provide fast, cost-effective, and biologically relevant assessment of DNA damage, chromosomal instability, and early mutagenic risk signals in a vertebrate whole-organism model.

We support clients in assessing the possible genotoxic risks of drug candidates, chemicals, cosmetic compounds, agrochemicals, environmental samples, and nanomaterials in zebrafish embryos and larvae prior to doing more resource-intensive investigations.

Key advantages:

In vivo vertebrate screening model
Rapid detection of DNA damage and chromosomal damage signals
Multiple endpoints including comet assay, micronucleus assay, oxidative stress, apoptosis, and DNA damage response markers
Suitable for early safety assessment and compound prioritization
Flexible study design for pharmaceuticals, chemicals, cosmetics, agrochemicals, and environmental toxicology

Mutagenicity vs. Genotoxicity

Genotoxicity and mutagenicity are related but not the same. The main objective of our zebrafish-based tests is to detect in vivo genotoxicity signals, such as DNA strand breakage, chromosomal damage, oxidative DNA damage and DNA damage response activation. These data can potentially provide an early indicator of possible mutagenesis danger.

Parameter	Genotoxicity	Mutagenicity
Definition	Ability to damage DNA or chromosomes	Ability to induce stable genetic mutations
Typical effects	DNA strand breaks, micronuclei, oxidative DNA lesions, DNA repair activation	Gene mutations, point mutations, somatic or germline mutation events
Zebrafish screening value	Detects in vivo DNA and chromosomal damage signals	Provides early mutagenic risk indication; can be extended with customized assays
Common readouts	Comet assay, micronucleus assay, γH2AX, p53, ROS, apoptosis	Targeted sequencing, mutation hotspot analysis, custom reporter systems

Our Zebrafish Mutagenicity & Genotoxicity Screening Services

We provide modular zebrafish-based screening services that can be selected individually or combined into a customized study package.

Service Module	Purpose	Key Endpoints
Dose Range-Finding & General Toxicity Assessment	Identify suitable test concentrations and avoid excessive toxicity-related artifacts	Survival, hatching, morphology, LC10/LC50, maximum tolerated concentration
Zebrafish Comet Assay	Detect DNA single- and double-strand breaks	Tail DNA %, tail moment, olive tail moment
Zebrafish Micronucleus Assay	Detect chromosomal breakage or chromosome loss	Micronucleated cell frequency, nuclear abnormalities
DNA Damage Response Marker Analysis	Assess molecular response to DNA damage	γH2AX, p53, gadd45, rad51, xrcc-related markers
Oxidative DNA Damage Assessment	Determine whether DNA damage is associated with oxidative stress	ROS, 8-OHdG, antioxidant response genes
Apoptosis & Cell Death Analysis	Evaluate cellular consequences of genotoxic stress	TUNEL, caspase activity, acridine orange staining
Custom Mutagenicity-Related Study	Support advanced investigation of potential mutation risk	Targeted sequencing, mutation hotspot analysis, custom reporter strategy

Endpoints We Can Measure

DNA Damage: DNA strand breaks, comet assay parameters, γH2AX signal, oxidative DNA damage markers, DNA repair gene expression
Chromosomal Damage: Micronucleus frequency, nuclear abnormalities, chromosomal fragmentation indicators, clastogenic/aneugenic risk signals
Cellular Consequences: Apoptosis, cell cycle disruption, developmental delay, growth inhibition, tissue-specific cell death
General Toxicity Context: Survival, hatching rate, malformation score, heart rate, body length, edema, pigmentation, and behavioral changes if required

Workflow

Why Choose Our Zebrafish Genotoxicity Screening Platform?

Zebrafish CRO Expertise

We specialize in zebrafish-based toxicology and in vivo screening, with experience in assay design, exposure optimization, endpoint selection, and data interpretation.

Multi-Endpoint Assessment

Our platform evaluates more than survival and morphology. We can assess DNA damage, chromosomal damage, oxidative stress, apoptosis, DNA damage response, and developmental toxicity in one integrated study.

Flexible Study Design

Assays can be customized for early screening, candidate ranking, mechanism studies, formulation comparison, or follow-up analysis of positive signals.

Fast and Cost-Effective

Zebrafish embryos and larvae enable rapid, scalable, and cost-efficient in vivo screening before mammalian studies.

Actionable Reporting

We provide clear data interpretation, dose-response analysis, toxicity-adjusted conclusions, and practical recommendations for next steps.

FAQ

What is genotoxicity screening in zebrafish?

Can zebrafish assays replace the Ames test?

What are the core assays in your platform?

What kind of samples can be tested?

How are test concentrations chosen?

For research use only. Not intended for any clinical use.