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Calbindin immunostaining in the CA1 hippocampal pyramidal cell layer of the human and mouse: A comparative study

AuthorsMerino-Serrais, Paula ; Tapia-González, Silvia; DeFelipe, Javier
KeywordsCalcium binding proteins
Pyramidal neuron
Non-pyramidal neuron
Postmortem time delay
Species differences
Issue Date2020
CitationJournal of Chemical Neuroanatomy 104 (2020)
AbstractImmunostaining for calbindin (CB) is commonly used to label particular populations of neurons. Recently, it has been shown that the CA1 pyramidal cells in the mouse can be subdivided along the radial axis into superficial and deep pyramidal cells and that this segregation in the radial axis may represent a general principle of structural and functional organization of the hippocampus. One of the most widely used markers of the superficial pyramidal cells is CB. However, this laminar segregation of pyramidal cells has not been reported in the human CA1 using CB immunostaining. The problem is that the different pattern of CB immunostaining observed in the mouse compared to the human could be explained by technical features, of which one of the most important is the postmortem time (PT) delay typical of the brain tissue obtained from humans. In the present study, we have studied the influences of PT delays and fixation procedures and we found that the clear differences found between the CA1 of the human and mouse do not depend on the fixation, but represent actual species-specific differences. These remarkable differences between species should be taken into consideration when making interpretations in translational studies from mouse to human brains.
Publisher version (URL)http://dx.doi.org/10.1016/j.jchemneu.2020.101745
Identifiersdoi: 10.1016/j.jchemneu.2020.101745
issn: 1873-6300
Appears in Collections:(IC) Artículos
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