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3Rs Safety  Testing of Gene Therapy Vectors





The World's First Human Cell-based Safety Evaluation Platform for Gene Therapy Products


As a scientific leader in genetic toxicology, TestAVec has developed the world’s first patented human stem cell (iPSc) based in vitro testing service to reduce genotoxic risk of gene therapy products.

Aiming to identify, reduce and eventually  replace the use of animal models that can give biased oncogenic outreads,  our ambition is to bolster confidence in gene therapy products and their application and accelerate the time taken for gene therapies to reach the clinic. 

The Gene Therapy Challenge


One of the most significant challenges in gene therapy today is finding solutions to avoid the side effects of viral vectors used to deliver gene therapy products directly into the patients genome. 


Integrating viral vectors may adversely impact product and patient safety due to random insertions into cancer genes and upregulation of these genes causing genotoxicity, mutagenesis and oncogenesis. 


Current pre-clinical animal studies deliver varied and often unreliable overestimates of the risk of insertional mutagenesis and can potentially limit GT products reaching the market through lack of confidence.


The challenge for the industry is to mitigate these risks through optimising the safety profile of product candidates across the whole GT product manufacturing process. 

The TestAVec Solution 


As a CRO, we have developed the world’s first and patented human iPSc In Vitro Genotoxicity Testing Platform that generates bespoke profiles gene therapy (GT) vector genotoxicity using precursor biomarkers of vector mediated cancer hallmarks in human - induced pluripotent stem cells with applicability to multiple genetic disorders.

Our bespoke service enables vector screening and selection during product design and non-clinical testing. 

We provide a safety by design service to increase confidence in GT products with clinically relevant go/no go in vitro assay read-outs informing product safety.

Our Ambition - 


To make our platform widely available as the industry gold standard for non-clinical genotoxicity testing for gene therapy

Eventually replacing use of animals in some pre-clinical tests increasing reliable prediction of risk, and significantly reducing the costs of clinical testing.


The TestAVec Promise -  


To make it possible asa CRO for all people suffering from genetic diseases to receive safety tested gene therapy products, also erasing the risk of genotoxic side effects of their therapy for their children and grandchildren.




"We believe we have developed a product which brings the TestAVec promise one step closer."


Mike Themis CSO, TestAVec Ltd 

Our Services


Vector Safety

By mimicking in vivo and

ex-vivo organ-specific gene transfer in any human tissue, our human in vitro  platform provides faster and more agile gene therapy vector genotoxicity profiling compared with misleading, non-human end-point oncogenesis. 


Vector Purity

We look at your gene therapy vector to discover what is inside them. Using our omics analysis we can see what expected and unexpected biologics are packaged inside your vector. 

Patient Eligibility

By testing your patient's cells, we can assess their capacity to tolerate gene therapy or other genome insulting agents. Testing patients early can identify people who should undergo alternative therapies to ensure patient health

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