Key result
A human FLNA knockout embryonic stem cell line (WAe009-A-P) was successfully generated using CRISPR/Cas9, demonstrating a 2 bp deletion, absence of FLNA protein, and maintained pluripotency.
Why the study?
Truncating FLNA mutations are associated with cardiac valvular dysplasia, but the exact role of FLNA in this disease requires further understanding.
The generation of a FLNA knockout hESC line provides a valuable in vitro model for studying the mechanisms of cardiac valvular dysplasia.
Answers are grounded in this paper and cite their sources.
Provides in vitro model for FLNA-related valvular dysplasia mechanisms; leaves open translation to therapies.
The FLNA gene encodes the cytoskeletal protein filamin A which plays a key role in the structure and function of the cardiac valves. Truncating FLNA mutations are associated with cardiac valvular dysplasia. To further understand the exact role of FLNA in this disease, we have generated a human FLNA knockout cell line from H9 using CRISPR/Cas9 technology in this study. This cell line WAe009-A-P has a 2 bp deletion in the exon 2 of FLNA gene which resulted in a frameshift in the translation of FLNA and no FLNA protein was detected in this cell line. Moreover, WAe009-A-P also expressed pluripotency markers, had a normal female karyotype (46XX) and maintained the ability to differentiate into the three germ layers in vitro.
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Lu et al. (2023) studied Cardiac valvular dysplasia. CRISPR/Cas9 FLNA knockout was evaluated on Generation and characterization of FLNA knockout hESC line. A human FLNA knockout embryonic stem cell line (WAe009-A-P) was successfully generated using CRISPR/Cas9, demonstrating a 2 bp deletion, absence of FLNA protein, and maintained pluripotency.
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