Products and services

Viral Vector Core Facility

Products and services

Custom viruses

Recombinant viruses can be custom synthesized on a fee-for service basis, when the customer provides transgene construct for virus production. Vector core can assist in research by designing novel constructs and subsequent production of the viruses, please consult the core facility for the details. 

For labs outside NTNU: Visit the Viral Vector Core webshop

The webshop is currently not available for labs within NTNU. Please contact us for prices and payment details.


We currently offer the following products

We currently offer the following products




Recombinant AAV is a replication defective, non-enveloped, non-pathogenic ssDNA virus- a very popular viral tool in research and nowadays in clinics. They rarely integrate into the host cell genome and remain primarily episomal.

Recombinant AAV-mediated transgene expression can persist for several years. There is transgene size limitation, it cannot accommodate large DNA sequences (can package a small payload up to 4.5 kb). Efficient for conditional expression of transgenes in combination with transgenics lines. Different serotypes with different cell-specific tropism can be synthesized.


Retrovirus (Moloney murine leukemia virus and Lentivirus)



A retrovirus is an enveloped, ssRNA virus. It is mainly used for stable, long-term gene expression because of its ability to stably integrate the viral genome into a host cell’s genome. The expression level is typically low.

The two types of retroviruses commonly used as viral vectors are the gamma-retroviruses (Moloney murine leukemia virus or MoMLV) and lentiviruses. The distinction between these two types of retroviruses is their ability to enter a host cell’s nucleus and subsequent integration of the viral DNA. Gamma-retroviruses (MoMLV) are used to target dividing cells and lentiviruses to target non-dividing cells.


Pseudotyped G-deleted (∆G) Rabies viruses


Rabies virus

Rabies virus is an enveloped, negative sRNA virus. Genetically modified rabies glycoprotein (G)-deleted rabies virus, trans-complemented with rabies-G (provided by transgenics or a helper virus) is used for transsynaptic input tracing.

EnvA-pseudotyped recombinant rabies cannot infect mammalian cells but it will infect only the cells that express exogenous receptor TVA on it surface (starter cells). Subsequent application of EnvA pseudotyped glycoprotein (G)-deleted rabies virus will infect the TVA+ cells and due to the presence of trans complemented rabies-G, the infectious rabies virus are formed in starter cells which will result in monosynaptic spreading of G-deleted rabies viruses to directly connected, presynaptic neurons.




Price List


Plasmids are circular, extrachromosomal DNA that can replicate independently in bacteria. They are essential for molecular cloning and subsequent expression of genes of interest in mammalian cells. Endotoxin-free plasmids enables successful transfection and expression of the genes in sensitive cell lines or tissue slices. We offer high-quality transfection-grade plasmid preparations for your research, please contact us for details.


Price list

Virus Type

Internal price*


External price*


Custom rAAV (approx 300ul)



Custom Lentivirus (approx 200ul)



Custom MoMLV  (approx 200ul)



Stock EnvA-∆G rabies Virus (approx 100µl)



*Production cost may reduce when more custom viruses are ordered together. Please contact us for details.


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Contact the core facility

Contact the core facility

For inquiries, please contact Core Manager 
Dr. Rajeevkumar Nair Raveendran,

Visiting address

Kavli Institute for Systems Neuroscience
Olav Kyrres gate 9
7030 Trondheim



To ensure our existence, we need to show that scientists are using Viral Vector Core, and that our services are reflected in publications. Viral Vector Core should be acknowledged in publications where tools or data from tools acquired at the Viral Vector Core facility is used. Please use the following sentence to credit Viral Vector Core:

"The xxx virus was obtained from the Viral Vector Core facility of the Kavli Institute for Systems Neuroscience, NTNU"

In addition, the Viral Vector Core facility must be notified when such a manuscript is accepted for publication, so that we can register it in our archive.


If highly qualified technical personnel or scientific personnel from Viral Vector Core facility contribute with their scientific knowledge to solve the scientific questions, they should be co-authors when the contribution is sin accordance with the "ICMJE Uniform Requirements for Manuscripts Submitted to Biomedical Journals concerning Authorship and Contributorship".

Use of instruments and assisted use of instruments in well known methods and performed by technical staff, is not enough to require co-authorship.

List of publications 

(Applied viral vectors produced at the Kavli Institute for Systems Neuroscience)

Jacobsen, R. I et al (2022). "All-viral tracing of monosynaptic inputs to single birthdate-defined neurons in the intact brain". Cell Reports Methods, Vol. 2

Bauer, U. S. et al (2022). "Validation of Functional Connectivity of Engineered Neuromuscular Junction With Recombinant Monosynaptic Pseudotyped G-Rabies Virus Tracking" Frontiers: 855071

Jacobsen, R. I. et al (2021). "All-viral tracing of monosynaptic inputs to single birthdate-defined neurons in the intact brain". BioRxiv: 464781v1 

Nigro, M. J. et al (2021). "Not all that is gold glitters: PV-IRES-Cre mouse line shows low efficiency of labeling of parvalbumin interneurons in the perirhinal cortex". Frontiers: 781928 

Obenshaus, H. A. et al (2021). "Functional network topography of the medical entorhinal cortex." BioRxiv: 461016

Zong, W. et al (2021). "Large-scale two-photon calium imaging in freely moving mice." BioRxiv: 461015

Asede, D. et al (2021). "Apical intercalated cell cluster: A distinct sensory regulator in the amygdala." Cell Reports. Vol. 35

Ohara, S. et al (2021). "Local projections of layer Vb-to-Va are more prominent in lateral than in medial entorhinal cortex." eLife

Nair, R.R., et al (2020). "Enhancer-Driven Gene Expression (EDGE) Enables the Generation of Viral Vectors Specific to Neuronal Subtypes." iScience. Vol. 23 (3).

Bauer, U.S., et al (2019). "Modelling functional human neuromuscular junctions in a differentially-perturbable microfluidic environment, validated through recombinant monosynaptic pseudotyped ΔG-rabies virus tracing." BioRxiv:745513.

Nair, R. R., et al (2019). "Generation of viral vectors specific to neuronal subtypes of targeted brain regions by Enhancer-Driven Gene Expression (EDGE)." BioRxiv: 606467.

Hovde, K., et al (2019). "Architecture and organization of mouse posterior parietal cortex relative to extrastriate areas." Eur J Neurosci 49(10):1313-1329.

Nilssen, E. S., et al. (2018). "Inhibitory Connectivity Dominates the Fan Cell Network in Layer II of Lateral Entorhinal Cortex." J Neurosci 38(45): 9712-9727.

Donato, F., et al. (2017). "Stellate cells drive maturation of the entorhinal-hippocampal circuit." Science 355(6330).

Conference presentations

Mabrouk, R., et al. "Effect of Reelin depletion of hilar mossy cells on Amyloid plaques at their terminal field in the dentate gyrus in 5XFAD mice modeling Alzheimer's disease." Abstract: 14. AD/PDTM  2019, the 14th International Conference on Alzheimer's and Parkinson's Diseases, Lisbon, Portugal, 2019.

Rowland, D. C., et al. "Functional characterization of neurons in layer V of the medial entorhinal cortex." Program No. 689.05 / EEE22. Society for Neuroscience, San Diego, USA, 2018.

Ohara, S., et al. "Projections of layer Vb neurons in the lateral and medial entorhinal cortex of the mouse." Abstract: 4277, F104. 11th FENS Forum of Neuroscience, Berlin, Germany, 2018.

Jacobsen, B., et al. "Monosynaptic inputs to somatostatin and parvalbumin interneurons in the entorhinal cortex of mice." Abstract: 4274, F101. 11th FENS Forum of Neuroscience, Berlin, Germany, 2018.

Kobro-Flatmoen, A., et al. "Effects of Reelin on the Accumulation of Intracellular Amyloid-β in the Reelin-Immunoreactive Neuronal Population of Entorhinal Cortex Layer II." Abstract: 1327, C003. 11th FENS Forum of Neuroscience, Berlin, Germany, 2018.

Jacobsen, R., et al. "How is a place field generated? Developing a method for the functional identification of inputs to a single hippocampal neuron." Program No. 84.12 / SS11. Society for Neuroscience, Washington, DC, USA, 2017.

Berndtsson, C. H., et al. "A novel transgenic tool for investigation of the claustrum and dorsal endopiriform nucleus." Program No. 775.10 / DD35. Society for Neuroscience, Washington, DC, USA, 2017.

Grimstvedt, J. S. et al. ''Brain-wide quantitation of monosynaptic inputs to subdivisions of the claustral complex.'' Program No. 251.15 / BB18. Society for Neuroscience, Chicago, USA, 2019.

Nigro, M. J. et al. ''Diversity of molecularly defined GABAergic interneurons in the mouse perirhinal cortex.'' Program No. 336.07 / BB60. Society for Neuroscience, Chicago, USA, 2019.