SHI Guirong,REN Bowen,ZHANG Zhongbo,et al.Mechanism of curcumin alleviating secondary cartilage damage by inhibiting lncRNA ARFRP1[J].Medical Journal of Wuhan University,2025,46(04):446-455.
SHI Guirong,REN Bowen,ZHANG Zhongbo,et al.Mechanism of curcumin alleviating secondary cartilage damage by inhibiting lncRNA ARFRP1[J].Medical Journal of Wuhan University,2025,46(04):446-455.DOI: 10.14188/j.1671-8852.2024.0119.
Mechanism of curcumin alleviating secondary cartilage damage by inhibiting lncRNA ARFRP1
To investigate the effect of curcumin on secondary cartilage damage in rats.
Methods
2
SD rats were randomly divided into the sham operation group
cartilage injury model group
50 mg⋅kg
-1
curcumin group
and 100 mg⋅kg
-1
curcumin group
with 10 rats in each group. A rat model of secondary cartilage damage was established
different concentrations of curcumin (50
100 mg⋅kg
-1
) were administered for intervention
and after 10 weeks of administration
cartilage tissues were excised for safranin O⁃fast green staining
and the staining results were evaluated by the osteoarthritis research society international (OARSI) joint pathology score. Chondrocytes were isolated and cultured
in vitro
and the toxicity of curcumin on chondrocytes was evaluated by using the cell counting kit⁃8 (CCK⁃8) assay. Cells were pretreated with curcumin at concentrations of 10 and 40 μmol⋅L
-1
for 24 h and subsequently stimulated with IL⁃1β for 24 h. Long noncoding RNA ADP ribosylation factor⁃related protein 1 (lncRNA ARFRP1) overexpression vectors were constructed and transfected in
to cells. Cell apoptosis was assessed by flow cytometry
levels of inflammatory factors were assessed by enzyme⁃linked immunosorbent assay (ELISA)
ARFRP1 expression was assessed by real⁃time quantitative PCR (RT qPCR)
and protein levels of collagen type Ⅱ (CollagenⅡ)
apoptotic proteins (Caspase3 and caspase9) and JNK/MAPK pathway⁃related proteins (p⁃JNK
p⁃p38) were assessed by Western Blot.
Results
2
The OARSI score of rats in the 100 mg⋅kg
-1
curcumin treatment group was 3.03
which was significantly lower than the score of 7.38 in the model group. Curcumin dose⁃dependently promoted the proliferation of chondrocytes and reduced IL⁃1β⁃induced apoptosis
expression levels of inflammatory factors
collagen Ⅱ
apoptotic proteins
as well as pathway proteins. Moreover
overexpression of lncRNA ARFRP1 or anisomycin
an activator of JNK
was able to inhibit the protective effect of curcumin on chondrocytes.
Conclusion
2
Curcumin alleviates secondary rat cartilage damage by inhibiting lncRNA ARFRP1 expression.
关键词
Keywords
references
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