Phenotypes and Genotypes in Five Children with Congenital Insensitivity to Pain with Anhidrosis.
Congenital insensitivity to pain with anhidrosis is an extremely rare hereditary disorder linked to variants in NTRK1. Our goal was to characterize the clinical features and the genetic basis of the disorder in Chinese patients.



Patients were enrolled via social networking. Clinical features were investigated by interview, chart review, and physical examination. DNA was extracted from peripheral blood to genotype NTRK1 in patients and their parents. Variants identified were checked against a control cohort by high-throughput sequencing, and the effects of these variants were assessed in silico.



Clinical features in five patients were cataloged, and six loss-of-function NTRK1 variants were identified, including a frameshift variant c.963delG, a nonsense variant c.1804C>T, an intron variant c.851-33T>A, and three missense variants c.1802T>G, c.2074C>T, and c.2311C>T.



The results expand the spectrum of clinical and genetic features of congenital insensitivity to pain with anhidrosis and will help facilitate analysis of genotype-phenotype association in the future.
Department of Anesthesiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China; Department of Anesthesiology, Wuhan General Hospital of Guangzhou Military, Wuhan, China.
Qing-Li
QL
Wang
Department of Anesthesiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
Shanna
S
Guo
Department of Anesthesiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
Guangyou
G
Duan
Department of Anesthesiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
Ying
Y
Ying
Department of Anesthesiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
Penghao
P
Huang
Key Laboratory of Molecular Biophysics of Ministry of Education, College of Life Science and Technology, Center for Human Genome Research, Huazhong University of Science and Technology, Wuhan, China.
Jing Yu
JY
Liu
Department of Anesthesiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China. Electronic address: ourpain@163.com.
Xianwei
X
Zhang
D002648:Child; D002675:Child, Preschool; D005260:Female; D005838:Genotype; D009477:Hereditary Sensory and Autonomic Neuropathies / Q000235:genetics* / Q000503:physiopathology*; D006801:Humans; D000073658:Loss of Function Mutation; D008297:Male; D010641:Phenotype; D020917:Receptor, trkA / Q000235:genetics*; D016415:Sequence Alignment; D017386:Sequence Homology, Amino Acid; D055815:Young Adult
D020917:Receptor, trkA
NTRK1; congenital insensitivity to pain with anhidrosis; genotype; phenotype; variant