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Updated: Dec 11, 2025

Skeletal Phenotype Analysis of a Conditional Stat3 Deletion Mouse Model
Published on: July 3, 2020
Circ-SLC8A1 regulates osteoporosis through blocking the inhibitory effect of miR-516b-5p on AKAP2 expression
Cheng Lin1, Wenjun Zhong1, Wei Yan1
1Department of Orthopedics, Clinic Medical College of Anhui Medical University, the First People's Hospital of Chuzhou City, Chuzhou, Anhui, China.
Background:
Osteoporosis is a disease characterized by bone loss, imbalance of bone metabolism and destruction of trabecular microarchitecture. Circular RNAs (circRNAs) have been revealed as important biological regulators in human diseases. The expression characteristics and mechanism of circRNAs in osteoporosis are unclear.
Methods:
The binding sites of miR-516b-5p on circ-SLC8A1 and AKAP2 mRNA were predicted using circAtlas (http://circatlas.biols.ac.cn) and miRDB (http://mirdb.org). Target sites of miR-516b-5p on circ-SLC8A1 and AKAP2 mRNA were confirmed by a dual luciferase assay. The relationship between miR-516b-5p and AKAP2 was determined by a quantitative reverse transcriptase-polymerase chain reaction. Alizarin red S staining and alkaline phosphatase staining were used to observe the level of osteogenic differentiation after transfection.
Results:
The first six circRNAs captured from the 30 circRNAs with highest expression in the bone marrow were examined in a mouse model of osteoporosis and the expression of circ-SLC8A1 was found to be significantly reduced in osteoporosis. Circ-SLC8A1 negatively regulated the expression of miR-516b-5p. Overexpression of circ-SLC8A1 blocked the inhibition of AKAP2 by miR-516b-5p.
Conclusions:
Circ-SLC8A1 blocks the inhibitory effect of miR-516b-5p on the downstream target gene AKAP2 and promotes osteoporosis. The findings of the present might help to provide a new strategy for the treatment of osteoporosis.
Insights
Circular RNA SLC8A1 (circ-SLC8A1) is reduced in osteoporosis and counteracts miR-516b-5p's effects on AKAP2. This finding offers a potential new treatment strategy for osteoporosis.
Area of Science:
- Molecular Biology
- Genetics
- Biochemistry
Background:
- Osteoporosis is a bone disease marked by bone loss and altered bone metabolism.
- Circular RNAs (circRNAs) are emerging regulators in human diseases, but their role in osteoporosis is not well understood.
Purpose of the Study:
- To investigate the expression and mechanism of circRNAs in osteoporosis.
- To explore the role of circ-SLC8A1 in the context of osteoporosis.
Main Methods:
- Bioinformatic prediction of microRNA binding sites.
- Dual luciferase assays to confirm target interactions.
- Quantitative reverse transcriptase-polymerase chain reaction to assess gene expression.
- Cell staining assays to evaluate osteogenic differentiation.
Main Results:
- Circ-SLC8A1 expression was significantly decreased in an osteoporosis mouse model.
- Circ-SLC8A1 negatively regulated miR-516b-5p expression.
- Overexpression of circ-SLC8A1 inhibited miR-516b-5p's suppressive effect on AKAP2.
Conclusions:
- Circ-SLC8A1 inhibits miR-516b-5p's action on AKAP2, thereby influencing osteoporosis.
- Circ-SLC8A1 presents a potential therapeutic target for osteoporosis treatment.
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