File(s) not publicly available

Detection of recombinant and endogenous mouse melatonin receptors by monoclonal antibodies targeting the C-terminal domain

journal contribution
posted on 2023-05-03, 18:14 authored by Erika Cecon, Anna Ivanova, Marine Luka, Florence Gbahou, Anne Friederich, Jean-Luc Guillaume, Patrick Keller, Klaus Knoch, Raise AhmadRaise Ahmad, Philippe Delagrange, Michele Solimena, Ralf Jockers
Melatonin receptors play important roles in the regulation of circadian and seasonal rhythms, sleep, retinal functions, the immune system, depression, and type 2 diabetes development. Melatonin receptors are approved drug targets for insomnia, non‐24‐hour sleep‐wake disorders, and major depressive disorders. In mammals, two melatonin receptors (MTRs) exist, MT1 and MT2, belonging to the G protein‐coupled receptor (GPCR) superfamily. Similar to most other GPCRs, reliable antibodies recognizing melatonin receptors proved to be difficult to obtain. Here, we describe the development of the first monoclonal antibodies (mABs) for mouse MT1 and MT2. Purified antibodies were extensively characterized for specific reactivity with mouse, rat, and human MT1 and MT2 by Western blot, immunoprecipitation, immunofluorescence, and proximity ligation assay. Several mABs were specific for either mouse MT1 or MT2. None of the mABs cross‐reacted with rat MTRs, and some were able to react with human MTRs. The specificity of the selected mABs was validated by immunofluorescence microscopy in three established locations (retina, suprachiasmatic nuclei, pituitary gland) for MTR expression in mice using MTR‐KO mice as control. MT2 expression was not detected in mouse insulinoma MIN6 cells or pancreatic beta‐cells. Collectively, we report the first monoclonal antibodies recognizing recombinant and native mouse melatonin receptors that will be valuable tools for future studies.


Rights statement

© 2018 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd


  • English

Does this contain Māori information or data?

  • No



Journal title

Journal of Pineal Research




Cecon, E., Ivanova, A., Luka, M., Gbahou, F., Friederich, A., Guillaume, J.-L., … Jockers, R. (2019). Detection of recombinant and endogenous mouse melatonin receptors by monoclonal antibodies targeting the C-terminal domain. Journal of Pineal Research, 66(2), e12540. doi:10.1111/jpi.12540|

Usage metrics


    Ref. manager