All issues > Volume 43(3); 2000

Original Article

J Korean Pediatr Soc. 2000;43(3):360-364. Published online March 15, 2000.

The Usefulness of Fluorescence in Situ Hybridization(FISH) in the Diagnosis of Prader-Willi Syndrome

Young Ho YH Yang¹, Duk Hee DH Kim², So Chung SC Chung², Yong Seok YS Sohn³, Mee Sun MS Kim⁴

¹Department of Obstetrics and Gynecology, Division of Prenatal Genetic Clinic, The Institute of Genetic Science, College of Medicine, Yonsei University, Seoul, Korea
²Department of Pediatrics, College of Medicine, Yonsei University, Seoul, Korea
³Department of Obstetrics and Gynecology, College of Medicine, Yonsei University, Seoul, Korea
⁴Division of Prenatal Genetic Clinic, College of Medicine, Yonsei University, Seoul, Korea

Abstract

Purpose
: To detect microdeletion of 15q11-13 region, high resolution cytogenetic analysis or FISH with probe at Prader-Willi syndrome region can be used. We tried to evaluate whether FISH with SNRPN is a more effective method than G-banding microscope in the diagnosis of Prader-Willi syndrome.
Methods
: Peripheral blood sampling was done on five patients who we suspected of Prader-Willi syndrome clinically and lymphocytes from peripheral blood sampling were cultured. G-banding microscope was used to detect the microdeletion in chromosome 15 and FISH with SNRPN probe was used to detect signal defect in band q11-q13 in chromosome 15.
Results
: There was a fluorescent signal defect in band 15 q11-q13 in one of chromosome 15 in 4 children with FISH method and only one patient was diagnosed with Prader-Willi syndrome with G-banding microscope.
Conclusion
: FISH analysis is more accurate, objective, and time saving than G-banding microscope, therefore it can be considered as a more adequate screening test for the diagnosis of Prader-Willi syndrome.

Keywords :FISH, G-banding microscope, Prader-Willi syndrome