Publications

Dernière publication 07/07/2020

Knock in of a hexanucleotide repeat expansion in the C9orf72 gene induces ALS in

Background: The GGGGCC (G4C2) repeat expansion in the human open reading frame 72 on chromosome 9, C9orf72, is the most common cause of...

Array
(
    [id_prestablog_news] => 1295
    [id_shop] => 1
    [date] => 2020-07-07 00:00:00
    [date_modification] => 2024-02-09 14:15:12
    [langues] => ["1","2"]
    [actif] => 1
    [slide] => 0
    [url_redirect] => 
    [average_rating] => 
    [number_rating] => 
    [author_id] => 1
    [featured] => 0
    [prim_key] => 2548
    [id_lang] => 2
    [title] => Knock in of a hexanucleotide repeat expansion in the C9orf72 gene induces ALS in
    [paragraph] => Knock in of a hexanucleotide repeat expansion in the C9orf72 gene induces ALS in rats
    [content] => 
Authors
W Dong, L Zhang, C Sun et al

 Lab
Key Laboratory of Human Disease Comparative Medicine, National Health Commission of China, Institute of Laboratory Animal Science, Peking Union Medicine College, Chinese Academy of Medical Sciences, Beijing, China.
Journal
Animal Models and Experimental Medicine
Abstract
Background: The GGGGCC (G4C2) repeat expansion in the human open reading frame 72 on chromosome 9, C9orf72, is the most common cause of amyotrophic lat- eral sclerosis (ALS). Studies in transgenic mouse models have linked the pathogenic mechanism of G4C2 repeat expansion to RNA foci or the accumulation of unnatural dipeptide repeats in neurons. However, only one of the existing transgenic mouse lines developed typical ALS.
Methods: C9orf72 knockin rats were generated by knockin of 80 G4C2 repeats with human flanking fragments within exon1a and exon1b at the rat C9orf72 locus. Protein expression was detected by western blot. Motor coordination and grip force were measured using a Rotarod test and a grip strength test. Neurodegeneration was as- sessed by Nissl staining with cresyl violet.
Results: C9orf72 haploinsufficiency reduced C9orf72 protein expression 40% in the cerebrum, cerebellum and spinal cords from knockin rats (P < .05). The knockin (KI) rats developed motor deficits from 4 months of age. Their falling latencies and grip force were decreased by 67% (P < .01) and 44% (P < .01), respectively, at 12 months of age compared to wild-type (WT) mice. The knockin of the hexanucleotide repeat expansion (HRE) caused a 47% loss of motor neurons in the spinal cord (P < .001) and 25% (5/20) of female KI rats developed hind limb paralysis at 13 to 24 months. 
Conclusion: Motor defects in KI rats may result from neurotoxicity caused by HRE and the resulting reduction in C9orf72 protein due to haploinsufficiency. These KI rats could be a useful model for investigating the contributions of loss-of-function to neurotoxicity in C9orf72-related ALS.
BIOSEB Instruments Used
Grip strength test (BIO-GS3)
    [meta_description] => 
    [meta_keywords] => https://onlinelibrary.wiley.com/doi/pdf/10.1002/ame2.12129
    [meta_title] => 
    [link_rewrite] => knock-in-of-a-hexanucleotide-repeat-expansion-in-the-c9orf72-gene-induces-als-in-rats
    [actif_langue] => 1
    [read] => 1065
    [count_comments] => 0
    [id] => 1295
    [categories] => Array
        (
            [2] => Array
                (
                    [id_prestablog_categorie] => 2
                    [title] => Publications
                    [link_rewrite] => publications
                )

            [67] => Array
                (
                    [id_prestablog_categorie] => 67
                    [title] => Sclérose Latérale Amyotrophique (SLA), ou Maladie de Charcot
                    [link_rewrite] => Sclerose-Laterale-Amyotrophique-SLA-ou-Maladie-de-Charcot
                )

        )

    [authors] => 
    [paragraph_crop] => Knock in of a hexanucleotide repeat expansion in the C9orf72 gene induces ALS in rats
    [link_for_unique] => 1
    [products_liaison] => Array
        (
            [48] => Array
                (
                    [name] => Test d'agrippement
                    [description_short] => 
Une méthode simple pour quantifier objectivement la force musculaire des rats et souris et l'effet de drogues, toxines, maladies musculaires (ex: myopathie) et neurodégénératives. Cette mesure de force est souvent employée en association avec le test de coordination motrice ROTAROD: un sujet présentant une coordination normale montrera des résultats médiocres en cas de faible force musculaire. Un must pour vos recherches sur l'activité, la coordination et le contrôle musculaire: particulièrement utile pour vos études sur les maladies de Parkinson et Huntington.
Nouveautés GS4 - 2023: Écran couleur rétroéclairé (meilleure lisibilité), pédale de remise à zéro, durée de batterie optimisée, taille de mémoire augmentée à 500 valeurs, compteur d'animaux, port USB (transfert de données/charge)

                    [thumb] => 
                    [img_empty] => /var/www/vhosts/de3310.ispfr.net/bioseb2024/modules/prestablog/views/img/product_link_white.jpg
                    [image_presente] => 1
                    [link] => https://bioseb.com/fr/activite-systeme-moteur-coordination/48-grip-strength-test.html
                )

        )

)
1