Preimplantation genetic testing for X-linked chronic granulomatous disease induced by a CYBB gene variant: A case report.
Xinlian Chen, Cuiting Peng, Han Chen, Fan Zhou, Yuezhi Keqie, Yutong Li, Shanling Liu, Jun Ren
Author Information
Xinlian Chen: Department of Medical Genetics, Center for Prenatal Diagnosis, West China Second University Hospital, Sichuan University, Sichuan, China.
Cuiting Peng: Department of Medical Genetics, Center for Prenatal Diagnosis, West China Second University Hospital, Sichuan University, Sichuan, China.
Han Chen: Department of Medical Genetics, Center for Prenatal Diagnosis, West China Second University Hospital, Sichuan University, Sichuan, China.
Fan Zhou: Department of Medical Genetics, Center for Prenatal Diagnosis, West China Second University Hospital, Sichuan University, Sichuan, China.
Yuezhi Keqie: Department of Medical Genetics, Center for Prenatal Diagnosis, West China Second University Hospital, Sichuan University, Sichuan, China.
Yutong Li: Department of Medical Genetics, Center for Prenatal Diagnosis, West China Second University Hospital, Sichuan University, Sichuan, China.
Shanling Liu: Department of Medical Genetics, Center for Prenatal Diagnosis, West China Second University Hospital, Sichuan University, Sichuan, China.
Jun Ren: Department of Medical Genetics, Center for Prenatal Diagnosis, West China Second University Hospital, Sichuan University, Sichuan, China. ORCID
INTRODUCTION: X-linked recessive chronic granulomatous disease (XR-CGD) is a severe primary immunodeficiency principally caused by a CYBB (OMIM: 300481) gene variant. Recurrent fatal bacterial or fungal infections are the main clinical manifestations of XR-CGD. PATIENT CONCERNS: In the current case, in vitro fertilization (IVF) associated with preimplantation genetic testing for monogenic disorder (PGT-M) was applied for a Chinese couple who had given birth to a boy with XR-CGD. DIAGNOSIS: Next-generation sequencing-based SNP haplotyping and Sanger-sequencing were used to detect the CYBB gene variant (c.804 + 2T>C, splicing) in this family. INTERVENTIONS: The patient was treated with IVF and PGT-M successively. OUTCOMES: In this IVF cycle, 7 embryos were obtained, and 2 of them were euploid and lacked the CYBB gene variant (c.804 + 2T>C). The PGT results were verified by prenatal diagnosis after successful pregnancy, and a healthy girl was eventually born. CONCLUSION: PGT-M is an effective method for helping families with these fatal and rare inherited diseases to have healthy offspring. It can availably block the transmission of disease-causing loci to descendant.
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