Characterization of early communicative behavior in mouse models of neurofibromatosis type 1.
NF1 mouse pups already show altered cry patterns, backing early communication screens in infants with the same gene.
01Research in Context
What this study did
Scientists recorded baby mouse cries called ultrasonic vocalizations (USVs). These high-pitched sounds work like early speech.
They used two NF1 gene models. One group had one faulty copy. The other group lost the gene in brain support cells. Both groups are linked to autism risk.
What they found
NF1+/- pups cried more often and changed pitch. NF1GFAP CKO pups cried less. Both still hit normal growth milestones like eye opening.
The mixed pattern shows NF1 changes early communication, but not overall baby development.
How this fits with other research
de Kuijper et al. (2014) saw language delays in preschoolers with NF1. The mouse cries match the human data: the same gene disrupts communication across species.
English et al. (2020) also tracked USVs, but in adult CHD8 autism mice. Their adults called longer, while E’s infant NF1 mice changed call number and pitch. Different genes, different ages, different cry patterns.
Özcan et al. (2025) found that learning to walk did not boost gestures in babies later diagnosed with ASD. Likewise, E’s pups had normal motor milestones yet still showed cry differences. Both papers warn: motor normal does not mean communication normal.
Why it matters
If you assess infants with NF1, do not wait for speech. Track early sounds, cries, and gestures now. The mouse data say communication wires can be off before words begin. Share this with pediatricians and families so language screening starts early, not at school entry.
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02At a glance
03Original abstract
UNLABELLED: Neurofibromatosis type 1 (NF1) is a monogenic neurodevelopmental disease caused by germline loss-of-function mutations in the NF1 tumor suppressor gene. Cognitive impairments are observed in approximately 80% of children with this disease, with 45-60% exhibiting autism spectrum disorder (ASD) symptomatology. In light of the high comorbidity rate between ASD and NF1, we assessed early communicative behavior by maternal-separation induced pup ultrasonic vocalizations (USV) and developmental milestones in two distinct Nf1 genetically engineered models, one modeling clinical germline heterozygous loss of Nf1 function (Nf1+/- mice), and a second with somatic biallelic Nf1 inactivation in neuroglial progenitor cells (Nf1GFAP CKO mice). We observed altered USV production in both models: Nf1+/- mice exhibited both increased USVs across development and alterations in aspects of pitch, while Nf1GFAP CKO mice demonstrated a decrease in USVs. Developmental milestones, such as weight, pinnae detachment, and eye opening, were not disrupted in either model, indicating the USV deficits were not due to gross developmental delay, and likely reflected more specific alterations in USV circuitry. In this respect, increased whole-brain serotonin was observed in Nf1+/- mice, but whole-brain levels of dopamine and its metabolites were unchanged at the age of peak USV disruption, and USV alterations did not correlate with overall level of neurofibromin loss. The early communicative phenotypes reported herein should motivate further studies into the risks mediated by haploinsufficiency and biallelic deletion of Nf1 across a full battery of ASD-relevant behavioral phenotypes, and a targeted analysis of underlying circuitry disruptions. Autism Res 2018, 11: 44-58. © 2017 International Society for Autism Research, Wiley Periodicals, Inc. LAY SUMMARY: Neurofibromatosis type 1 (NF1) is a common neurogenetic disorder caused by mutation of the NF1 gene, in which 80% of affected children exhibit cognitive and behavioral issues. Based on emerging evidence that NF1 may be an autism predisposition gene, we examined autism spectrum disorder (ASD)-relevant early communicative behavior in Nf1 mouse models and observed alterations in both models. The changes in early communicative behavior in Nf1 mutant mice should motivate further studies into the causative factors and potential treatments for ASD arising in the context of NF1.
Autism research : official journal of the International Society for Autism Research, 2018 · doi:10.1101/gad.862101