ADGRL1 haploinsufficiency causes a variable spectrum of neurodevelopmental disorders in humans and alters synaptic activity and behavior in a mouse model.

Fiche publication

Date publication

juillet 2022


American journal of human genetics


Membres identifiés du Cancéropôle Est :
Pr FAIVRE Laurence, Pr PHILIPPE Christophe, Dr NAMBOT Sophie, Mr DUFFOURD Yannis

Tous les auteurs :
Vitobello A, Mazel B, Lelianova VG, Zangrandi A, Petitto E, Suckling J, Salpietro V, Meyer R, Elbracht M, Kurth I, Eggermann T, Benlaouer O, Lall G, Tonevitsky AG, Scott DA, Chan KM, Rosenfeld JA, Nambot S, Safraou H, Bruel AL, Denommé-Pichon AS, Tran Mau-Them F, Philippe C, Duffourd Y, Guo H, Petersen AK, Granger L, Crunk A, Bayat A, Striano P, Zara F, Scala M, Thomas Q, Delahaye A, de Sainte Agathe JM, Buratti J, Kozlov SV, Faivre L, Thauvin-Robinet C, Ushkaryov Y


ADGRL1 (latrophilin 1), a well-characterized adhesion G protein-coupled receptor, has been implicated in synaptic development, maturation, and activity. However, the role of ADGRL1 in human disease has been elusive. Here, we describe ten individuals with variable neurodevelopmental features including developmental delay, intellectual disability, attention deficit hyperactivity and autism spectrum disorders, and epilepsy, all heterozygous for variants in ADGRL1. In vitro, human ADGRL1 variants expressed in neuroblastoma cells showed faulty ligand-induced regulation of intracellular Ca influx, consistent with haploinsufficiency. In vivo, Adgrl1 was knocked out in mice and studied on two genetic backgrounds. On a non-permissive background, mice carrying a heterozygous Adgrl1 null allele exhibited neurological and developmental abnormalities, while homozygous mice were non-viable. On a permissive background, knockout animals were also born at sub-Mendelian ratios, but many Adgrl1 null mice survived gestation and reached adulthood. Adgrl1 mice demonstrated stereotypic behaviors, sexual dysfunction, bimodal extremes of locomotion, augmented startle reflex, and attenuated pre-pulse inhibition, which responded to risperidone. Ex vivo synaptic preparations displayed increased spontaneous exocytosis of dopamine, acetylcholine, and glutamate, but Adgrl1 neurons formed synapses in vitro poorly. Overall, our findings demonstrate that ADGRL1 haploinsufficiency leads to consistent developmental, neurological, and behavioral abnormalities in mice and humans.

Mots clés

ADGRL1, ADHD, ASD, Adgrl1 knockout mice, attention deficit hyperactivity disorder, autism spectrum disorder, developmental delay, epilepsy, intellectual disability, malfunctional behavior in mice, neuropsychiatric disorders, variable expressivity


Am J Hum Genet. 2022 07 29;: