Li Y, Liang L, Qin T, Tian M. Detection of hemoglobin H disease by long molecule sequencing.
J Clin Lab Anal 2022;
36:e24687. [PMID:
36059093 PMCID:
PMC9550979 DOI:
10.1002/jcla.24687]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Revised: 07/20/2022] [Accepted: 08/24/2022] [Indexed: 11/11/2022] Open
Abstract
Background
Hemoglobin H (Hb H) disease is a moderate‐to‐severe form of α‐thalassemia (α‐thal), and parts of patients may require intermittent transfusion therapy, especially during intercurrent illness. However, rare Hb H diseases remain undetected using routine methods being outside of the testing scope. In this study, we present an approach to detecting Hb H disease by long molecule sequencing (LMS).
Methods
A total of 206 known genotype samples were collected and carried to blind detected by LMS on the PacBio Sequel platform. Circular consensus sequencing reads were aligned to the hg19 reference genome using Free‐Bayes finished LMS. LMS accuracy would be compared with routine methods, including Gap‐PCR and PCR‐Reverse dot blot hybridization (PCR–RDB).
Results
The assay could detect carriers of both deletion and point mutations. It had an overall accuracy of 100% when compared with routine methods. In addition, LMS detected six mutations based on routine methods and corrected three case results. Hb H diseases were identified using LMS, whether a common or rare genotype, a deletion or non‐deletion genotype. However, two cases of Hb H disease were misdiagnosed using routine methods.
Conclusions
Long molecule sequencing can be suggested as a rapid and reliable assay to detect probable carriers of hemoglobinopathies. LMS accurately identified the common and rare genotypes of Hb H disease.
Collapse