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Implementation of a Targeted Next-Generation Sequencing Panel for Constitutional Newborn Screening in High-Risk Neonates

Yonsei Medical Journal 2019년 60권 11호 p.1061 ~ 1066
 ( Lee Hyun-Joo ) - Yonsei University College of Medicine Severance Children’s Hospital Department of Pediatrics

 ( Lim Joo-Hee ) - Yonsei University College of Medicine Severance Children’s Hospital Department of Pediatrics
 ( Shin Jeong-Eun ) - Yonsei University College of Medicine Severance Children’s Hospital Department of Pediatrics
 ( Eun Ho-Sun ) - Yonsei University College of Medicine Severance Children’s Hospital Department of Pediatrics
 ( Park Min-Soo ) - Yonsei University College of Medicine Severance Children’s Hospital Department of Pediatrics
 ( Park Kook-In ) - Yonsei University College of Medicine Severance Children’s Hospital Department of Pediatrics
 ( Namgung Ran ) - Yonsei University College of Medicine Severance Children’s Hospital Department of Pediatrics
 ( Lee Jin-Sung ) - Yonsei University College of Medicine Severance Children’s Hospital Department of Pediatrics

Abstract


Purpose: Newborn screening (NBS) programs are important for appropriate management of susceptible neonates to prevent serious clinical problems. Neonates admitted to neonatal intensive care units (NICU) are at a potentially high risk of false-positive results, and repetitive NBS after total parenteral nutrition is completely off results in delayed diagnosis. Here, we present the usefulness of a targeted next-generation sequencing (TNGS) panel to complement NBS for early diagnosis in high-risk neonates.

Materials and Methods: The TNGS panel covered 198 genes associated with actionable genetic and metabolic diseases that are typically included in NBS programs in Korea using tandem mass spectrometry. The panel was applied to 48 infants admitted to the NICU of Severance Children's Hospital between May 2017 and September 2017. The infants were not selected for suspected metabolic disorders.

Results: A total of 13 variants classified as likely pathogenic or pathogenic were detected in 11 (22.9%) neonates, including six genes (DHCR7, PCBD1, GAA, ALDOB, ATP7B, and GBA) associated with metabolic diseases not covered in NBS. One of the 48 infants was diagnosed with an isobutyl-CoA dehydrogenase deficiency, and false positive results of tandem mass screening were confirmed in two infants using the TNGS panel.

Conclusion: The implementation of TNGS in conjunction with conventional NBS can allow for better management of and earlier diagnosis in susceptible infants, thus preventing the development of critical conditions in these sick infants.

키워드

Newborn screening; targeted next-generation sequencing; stressed infants; NBS; false-positive results; inborn errors of metabolism
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