Long Noncoding RNA lnc-TCEA1-3 Affects Osteoclastic Function by Regulating ATP6V1H.

Area of Science:

• Molecular Biology
• Bone Biology
• Genetics

Background:

• The H subunit of V-ATPase (ATP6V1H) is crucial for osteoclast function and its deficiency is linked to osteoporosis.
• Previous research identified intronic single nucleotide polymorphisms (SNPs) in ATP6V1H associated with reduced bone mineral density, but the underlying mechanisms remained unclear.

Purpose of the Study:

• To investigate the functional role of lnc-TCEA1-3 in regulating ATP6V1H expression and osteoclast activity.
• To elucidate the mechanism by which ATP6V1H-related SNPs influence bone mineral density.

Main Methods:

• Bioinformatic analysis to locate four intronic SNPs within lncRNA lnc-TCEA1-3.
• Functional studies using Atp6v1h knockout mice, lentivirus transfection, and quantitative PCR (qPCR) analysis.
• Assessment of lnc-TCEA1-3's effect on ATP6V1H expression and osteoclast proliferation in various cell lines and primary osteoclasts.

Main Results:

• The four identified intronic SNPs of ATP6V1H were found to be located within lnc-TCEA1-3.
• Overexpression of lnc-TCEA1-3 significantly upregulated ATP6V1H expression in HEK293 cells, HOS cells, and primary osteoclasts.
• lnc-TCEA1-3 overexpression led to an increased number of primary osteoclasts and exhibited distinct effects on ATP6V1H transcripts.

Conclusions:

• lnc-TCEA1-3 plays a regulatory role in ATP6V1H expression and osteoclastogenesis.
• This finding provides a mechanistic link between ATP6V1H-associated SNPs and bone density regulation.
• lnc-TCEA1-3 represents a potential therapeutic target for bone diseases like osteoporosis.