Effect of Danggui Niantongtang on Expression of Autophagy-related Proteins LC3, Beclin1 and p62 in Rats with Adjuvant Arthritis Differentiated into Wind-damp-heat Impediment
|更新时间:2022-01-04
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Effect of Danggui Niantongtang on Expression of Autophagy-related Proteins LC3, Beclin1 and p62 in Rats with Adjuvant Arthritis Differentiated into Wind-damp-heat Impediment
Chinese Journal of Experimental Traditional Medical FormulaeVol. 28, Issue 1, Pages: 41-49(2022)
LU Qi-jin,LI Jia-yu,CAI Yi-si,et al.Effect of Danggui Niantongtang on Expression of Autophagy-related Proteins LC3, Beclin1 and p62 in Rats with Adjuvant Arthritis Differentiated into Wind-damp-heat Impediment[J].Chinese Journal of Experimental Traditional Medical Formulae,2022,28(01):41-49.
LU Qi-jin,LI Jia-yu,CAI Yi-si,et al.Effect of Danggui Niantongtang on Expression of Autophagy-related Proteins LC3, Beclin1 and p62 in Rats with Adjuvant Arthritis Differentiated into Wind-damp-heat Impediment[J].Chinese Journal of Experimental Traditional Medical Formulae,2022,28(01):41-49. DOI: 10.13422/j.cnki.syfjx.20211842.
Effect of Danggui Niantongtang on Expression of Autophagy-related Proteins LC3, Beclin1 and p62 in Rats with Adjuvant Arthritis Differentiated into Wind-damp-heat Impediment
To observe the preventive and control effects of Danggui Niantongtang against adjuvant arthritis differentiated into wind-damp-heat impediment in rats and its influences on the expression of autophagy-related proteins microtubule-associated protein 1 light chain 3 (LC3), homolog of yeast Atg6 (Beclin1) and p62.
Method
2
The six-week-old male SD rats were randomly divided into the normal group, wind-damp-heat impediment model group, low-, medium-, and high-dose Danggui Niantongtang (5.67, 11.34, 22.68 g·kg
-1
) groups, and methotrexate (MTX, 1.35 mg·kg
-1
) group, with 10 rats in each group. A rat model of adjuvant arthritis was established by subcutaneous injection of inactivated
Mycobacterium tuberculosis
into the tail root, followed by exposure to the manual climatic box for 16 d for inducing the wind-damp-heat impediment. The drugs were administered intragastrically on the day of immunization for 28 d. The general conditions of rats were observed and the swelling degree of toes and arthritis index (AI) were detected. The pathological changes in the synovial tissues of the knee joints were observed by hematoxylin-eosin (HE) staining. The mRNA expression levels of LC3, Beclin1, and p62 in the synovial tissues were measured by real-time fluorescence quantitative polymerase chain reaction (Real-time PCR), followed by the assay of their protein expression by Western blot and immunohistochemistry.
Result
2
Compared with the normal group, the wind-damp-heat impediment model group exhibited significantly increased swelling degree of toes (
P
<
0.01), increased AI (
P
<
0.01), proliferated synovial cells (
P
<
0.01), up-regulated LC3 and Beclin1 protein and mRNA expression (
P
<
0.01), and down-regulated p62 protein and mRNA expression (
P
<
0.01) after 16, 20, 24, 28-d medication. Compared with the wind-damp-heat impediment model group, each medication group displayed alleviated toe swelling and synovial hyperplasia to different degrees, decreased mRNA and protein expression levels of LC3 and Beclin1 (
P
<
0.01), and increased p62 mRNA and protein expression (
P
<
0.05,
P
<
0.01), with the best outcomes observed in the medium-dose Danggui Niantongtang group.
Conclusion
2
Danggui Niantongtang effectively relieves adjuvant arthritis due to wind-damp-heat impediment in rats, which may be related to its regulation of the expression of autophagy-related proteins LC3, Beclin1, and p62 and the inhibition of autophagy.
关键词
Keywords
references
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