Lin-can ZHAO, Wei-wei LI, Yi-ming WU, et al. Effect of Duhuo Jisheng Tang on PERK/Bip Signaling Pathway in Knee Osteoarthritis Model Rats[J]. Chinese journal of experimental traditional medical formulae, 2019, 25(9): 18-24.
DOI:
Lin-can ZHAO, Wei-wei LI, Yi-ming WU, et al. Effect of Duhuo Jisheng Tang on PERK/Bip Signaling Pathway in Knee Osteoarthritis Model Rats[J]. Chinese journal of experimental traditional medical formulae, 2019, 25(9): 18-24. DOI: 10.13422/j.cnki.syfjx.20190937.
Effect of Duhuo Jisheng Tang on PERK/Bip Signaling Pathway in Knee Osteoarthritis Model Rats
To explore the possible mechanism of Duhuo Jisheng Tang in relieving knee osteoarthritis based on protein kinase R-like endoplasmic reticulum kinase(PERK)/immunoglobulin-binding protein(Bip)signaling pathway.
Method:
2
A model of knee osteoarthritis was established by cold stimulation.Rats were randomly divided into blank group
model group
celecoxib group(0.021 g·kg
-1
)
low
medium and high-dose Duhuo Jisheng Tang groups (8.37
16.72
33.48 g·kg
-1
). Blank group and model group were given equal volume of physiological saline.The changes of knee joint diameter were recorded.The pathological changes of rat articular cartilage were observed by hematoxylin-eosin (HE) staining.The expressions of tumor necrosis factor-alpha(TNF-
α
)
interleukin-1
β
(IL-1
β
)and hyaluronic acid(HA)in serum were detected by enzyme-linked immunosorbent assay(ELISA). The mRNA and protein expression levels of PERK
Bip and cysteinyl as parates pecific protein-9(Caspase-9)in cartilage were detected by Real-time PCR and Western blot.
Result:
2
The knee joint redn ess and the joint diameter of celecoxib group and high-dose Duhuo Jisheng Tang group were improved
and the joint diameter was reduced significantly(
P
<
0.01). The local fractures of knee joint cartilage in the celecoxib group and the high-dose Duhuo Jisheng Tang group were significantly improved.Compared with blank group
the expression levels of TNF-
α
IL-1
β
and HA were increased in model group(
P
<
0.01). The gene and protein expression levels of PERK
Bip and Caspase-9 in cartilage of the model group were increased(
P
<
0.05
P
<
0.01). Compared with model group
the expressions of TNF-
α
IL-1
β
and HA in serum of celecoxib group and high-dose Duhuo Jisheng Tang group were decreased(
P
<
0.05
P
<
0.01). The mRNA and protein expression levels of PERK
Bip and Caspase-9 in cartilage of celecoxib group and high-dose Duhuo Jisheng Tang group were decreased(
P
<
0.05
P
<
0.01).
Conclusion:
2
Duhuo Jisheng Tang can alleviate the symptoms of knee osteoarthritis model rats
and its mechanism may be related to the regulation of PERK/Bip signaling pathway in rat cartilage.
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