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Di Franco N, Drutel G, Roullot-Lacarrière V, Julio-Kalajzic F, Lalanne V, Grel A, Leste-Lasserre T, Matias I, Cannich A, Gonzales D, Simon V, Cota D, Marsicano G, Piazza PV, Vallée M, Revest JM. Differential expression of the neuronal CB1 cannabinoid receptor in the hippocampus of male Ts65Dn Down syndrome mouse model. Mol Cell Neurosci 2022; 119:103705. [PMID: 35158060 DOI: 10.1016/j.mcn.2022.103705] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Revised: 01/27/2022] [Accepted: 02/08/2022] [Indexed: 10/19/2022] Open
Abstract
Down syndrome (DS) or Trisomy 21 is the most common genetic cause of mental retardation with severe learning and memory deficits. DS is due to the complete or partial triplication of human chromosome 21 (HSA21) triggering gene overexpression and protein synthesis alterations responsible for a plethora of mental and physical phenotypes. Among the diverse brain target systems that affect hippocampal-dependent learning and memory deficit impairments in DS, the upregulation of the endocannabinoid system (ECS), and notably the overexpression of the cannabinoid type-1 receptor (CB1), seems to play a major role. Combining various protein and gene expression targeted approaches using western blot, qRT-PCR and FISH techniques, we investigated the expression pattern of ECS components in the hippocampus (HPC) of male Ts65Dn mice. Among all the molecules that constitute the ECS, we found that the expression of the CB1 is altered in the HPC of Ts65Dn mice. CB1 distribution is differentially segregated between the dorsal and ventral part of the HPC and within the different cell populations that compose the HPC. CB1 expression is upregulated in GABAergic neurons of Ts65Dn mice whereas it is downregulated in glutamatergic neurons. These results highlight a complex regulation of the CB1 encoding gene (Cnr1) in Ts65Dn mice that could open new therapeutic solutions for this syndrome.
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Affiliation(s)
- Nadia Di Franco
- Univ. Bordeaux, INSERM, Neurocentre Magendie, U1215, F-33000 Bordeaux, France
| | - Guillaume Drutel
- Univ. Bordeaux, INSERM, Neurocentre Magendie, U1215, F-33000 Bordeaux, France
| | | | | | - Valérie Lalanne
- Univ. Bordeaux, INSERM, Neurocentre Magendie, U1215, F-33000 Bordeaux, France
| | - Agnès Grel
- Univ. Bordeaux, INSERM, Neurocentre Magendie, U1215, F-33000 Bordeaux, France
| | | | - Isabelle Matias
- Univ. Bordeaux, INSERM, Neurocentre Magendie, U1215, F-33000 Bordeaux, France
| | - Astrid Cannich
- Univ. Bordeaux, INSERM, Neurocentre Magendie, U1215, F-33000 Bordeaux, France
| | - Delphine Gonzales
- Univ. Bordeaux, INSERM, Neurocentre Magendie, U1215, F-33000 Bordeaux, France
| | - Vincent Simon
- Univ. Bordeaux, INSERM, Neurocentre Magendie, U1215, F-33000 Bordeaux, France
| | - Daniela Cota
- Univ. Bordeaux, INSERM, Neurocentre Magendie, U1215, F-33000 Bordeaux, France
| | - Giovanni Marsicano
- Univ. Bordeaux, INSERM, Neurocentre Magendie, U1215, F-33000 Bordeaux, France
| | | | - Monique Vallée
- Univ. Bordeaux, INSERM, Neurocentre Magendie, U1215, F-33000 Bordeaux, France
| | - Jean-Michel Revest
- Univ. Bordeaux, INSERM, Neurocentre Magendie, U1215, F-33000 Bordeaux, France.
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Zanese M, Tomaselli G, Roullot-Lacarrière V, Moreau M, Bellocchio L, Grel A, Marsicano G, Sans N, Vallée M, Revest JM. Alpha technology: A powerful tool to detect mouse brain intracellular signaling events. J Neurosci Methods 2020; 332:108543. [PMID: 31830543 DOI: 10.1016/j.jneumeth.2019.108543] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2019] [Revised: 11/15/2019] [Accepted: 12/05/2019] [Indexed: 12/17/2022]
Abstract
BACKGROUND Phosphorylation by protein kinases is a fundamental molecular process involved in the regulation of signaling activities in living organisms. Understanding this complex network of phosphorylation, especially phosphoproteins, is a necessary step for grasping the basis of cellular pathophysiology. Studying brain intracellular signaling is a particularly complex task due to the heterogeneous complex nature of the brain tissue, which consists of many embedded structures. NEW METHOD Overcoming this degree of complexity requires a technology with a high throughput and economical in the amount of biological material used, so that a large number of signaling pathways may be analyzed in a large number of samples. We have turned to Alpha (Amplified Luminescent Proximity Homogeneous Assay) technology. COMPARISON WITH EXISTING METHOD Western blot is certainly the most commonly used method to measure the phosphorylation state of proteins. Even though Western blot is an accurate and reliable method for analyzing modifications of proteins, it is a time-consuming and large amounts of samples are required. Those two parameters are critical when the goal of the research is to comprehend multi-signaling proteic events so as to analyze several targets from small brain areas. RESULT Here we demonstrate that Alpha technology is particularly suitable for studying brain signaling pathways by allowing rapid, sensitive, reproducible and semi-quantitative detection of phosphoproteins from individual mouse brain tissue homogenates and from cell fractionation and synaptosomal preparations of mouse hippocampus. CONCLUSION Alpha technology represents a major experimental step forward in unraveling the brain phosphoprotein-related molecular mechanisms involved in brain-related disorders.
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Affiliation(s)
- Marion Zanese
- INSERM U1215, NeuroCentre Magendie, 33077 Bordeaux, France; University of Bordeaux, 33077 Bordeaux, France
| | - Giovanni Tomaselli
- INSERM U1215, NeuroCentre Magendie, 33077 Bordeaux, France; University of Bordeaux, 33077 Bordeaux, France
| | - Valérie Roullot-Lacarrière
- INSERM U1215, NeuroCentre Magendie, 33077 Bordeaux, France; University of Bordeaux, 33077 Bordeaux, France
| | - Maïté Moreau
- INSERM U1215, NeuroCentre Magendie, 33077 Bordeaux, France; University of Bordeaux, 33077 Bordeaux, France
| | - Luigi Bellocchio
- INSERM U1215, NeuroCentre Magendie, 33077 Bordeaux, France; University of Bordeaux, 33077 Bordeaux, France
| | - Agnès Grel
- INSERM U1215, NeuroCentre Magendie, 33077 Bordeaux, France; University of Bordeaux, 33077 Bordeaux, France
| | - Giovanni Marsicano
- INSERM U1215, NeuroCentre Magendie, 33077 Bordeaux, France; University of Bordeaux, 33077 Bordeaux, France
| | - Nathalie Sans
- INSERM U1215, NeuroCentre Magendie, 33077 Bordeaux, France; University of Bordeaux, 33077 Bordeaux, France
| | - Monique Vallée
- INSERM U1215, NeuroCentre Magendie, 33077 Bordeaux, France; University of Bordeaux, 33077 Bordeaux, France
| | - Jean-Michel Revest
- INSERM U1215, NeuroCentre Magendie, 33077 Bordeaux, France; University of Bordeaux, 33077 Bordeaux, France.
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Affiliation(s)
| | - Miguel Mondésir
- Physiopathology of Neuronal Plasticity, Neurocentre Magendie INSERM U1215 Bordeaux France
- University of Bordeaux Bordeaux France
| | - Agnès Grel
- Physiopathology of Neuronal Plasticity, Neurocentre Magendie INSERM U1215 Bordeaux France
- University of Bordeaux Bordeaux France
| | - Monique Vallée
- Physiopathology of Neuronal Plasticity, Neurocentre Magendie INSERM U1215 Bordeaux France
- University of Bordeaux Bordeaux France
| | - Pier‐Vincenzo Piazza
- Physiopathology of Neuronal Plasticity, Neurocentre Magendie INSERM U1215 Bordeaux France
- University of Bordeaux Bordeaux France
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