J Korean Pediatr Soc.  2000 Mar;43(3):360-364.

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

• Yang YH
• Kim DH
• Chung SC
• Sohn YS
• Kim MS

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. MEHTODS: 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.

Keyword

FISH; G-banding microscope; Prader-Willi syndrome

MeSH Terms

Child
Chromosomes, Human, Pair 15
Cytogenetic Analysis
Diagnosis*
Fluorescence*
Humans
Lymphocytes
Mass Screening
Prader-Willi Syndrome*
snRNP Core Proteins
snRNP Core Proteins