Format

Send to

Choose Destination
Pediatr Neurol. 2019 Jan;90:37-43. doi: 10.1016/j.pediatrneurol.2018.09.008. Epub 2018 Sep 21.

Volumetric Analysis of the Basal Ganglia and Cerebellar Structures in Patients with Phelan-McDermid Syndrome.

Author information

1
Department of Neurology, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts; F.M. Kirby Neurobiology Center, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts.
2
Department of Radiology, Boston Children's Hospital and Harvard Medical School, Boston, Massachusetts.
3
Department of Neurology, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts.
4
Seaver Autism Center for Research and Treatment, Mount Sinai School of Medicine, New York, New York; Department of Psychiatry, Icahn School of Medicine at Mount Sinai, New York, New York.
5
Seaver Autism Center for Research and Treatment, Mount Sinai School of Medicine, New York, New York; Department of Psychiatry, Icahn School of Medicine at Mount Sinai, New York, New York; Department of Genetics and Genomic Sciences, Mount Sinai School of Medicine, New York, New York; Department of Neuroscience, Mount Sinai School of Medicine, New York, New York.
6
Department of Pediatrics, Rush University Medical Center, Chicago, Illinois; Department of Neurological Sciences, Rush University Medical Center, Chicago, Illinois; Department of Biochemistry, Rush University Medical Center, Chicago, Illinois.
7
Department of Psychiatry, Rush University Medical Center, Chicago, Illinois.
8
Pediatrics and Developmental Neuroscience Branch, National Institute of Mental Health, National Institutes of Health, Bethesda, Maryland.
9
Department of Neurology and Neurotherapeutics, University of Texas Southwestern Medical Center, Dallas, Texas; Department of Psychiatry and Neuroscience Graduate Program, University of Texas Southwestern Medical Center, Dallas, Texas.
10
Department of Pediatrics, Stanford University School of Medicine, Stanford, California.
11
Department of Neurology, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts; F.M. Kirby Neurobiology Center, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts. Electronic address: mustafa.sahin@childrens.harvard.edu.

Abstract

OBJECTIVE:

Phelan-McDermid syndrome is caused by haploinsufficiency of SHANK3 on terminal chromosome 22. Knowledge about altered neuroanatomic circuitry in Phelan-McDermid syndrome comes from mouse models showing striatal hypertrophy in the basal ganglia, and from humans with evidence of cerebellar atrophy. To date, no studies have performed volumetric analysis on Phelan-McDermid syndrome patients.

METHODS:

We performed volumetric analysis of baseline brain MRIs of Phelan-McDermid syndrome patients (ages three to 21 years) enrolled in a prospective natural history study (ClinicalTrials.gov NCT02461420). Using MRI segmentations carried out with PSTAPLE algorithm, we measured relative volumes (volume of the structure divided by the volume of the brain parenchyma) of basal ganglia and cerebellar structures. We compared these measurements to those of age- and sex-matched healthy controls part of another study. Among the patients, we performed linear regression of each relative volume using Repetitive Behavior Scale-Revised total score and Aberrant Behavior Checklist stereotypy score. Eleven patients with Phelan-McDermid syndrome (six females, five males) and 11 healthy controls were in this analysis.

RESULTS:

At time of MRI, the mean age of the patients and controls was 9.24 (5.29) years and 9.00 (4.49) years, respectively (P = 0.66). Compared to controls, patients had decreased caudate (P ≤ 0.013), putamen (P ≤ 0.026), and left pallidum (P = 0.033) relative volumes. Relative volume of cerebellar vermal lobules I to V (beta coefficient = -17119, P = 0.017) decreased with increasing Repetitive Behavior Scale-Revised total score.

CONCLUSIONS:

The volumes of the striatum and left pallidum are decreased in individuals with Phelan-McDermid syndrome. Cerebellar vermis volume may predict repetitive behavior severity in Phelan-McDermid syndrome. These findings warrant further investigation in larger samples.

KEYWORDS:

22q13.3 Deletion; Autism; MRI; Repetitive behaviors; SHANK3

PMID:
30396833
PMCID:
PMC6309632
[Available on 2020-01-01]
DOI:
10.1016/j.pediatrneurol.2018.09.008

Supplemental Content

Full text links

Icon for Elsevier Science
Loading ...
Support Center