LI Fei-xiang,CHU Quan-gen,WANG Pan,et al.Co-Treatment of Phlegm and Stasis Improves Myocardial Inflammation in Rats with Diabetes Mellitus via TLR4/NF-κB/IκB Pathway[J].Chinese Journal of Experimental Traditional Medical Formulae,2021,27(22):59-64.
LI Fei-xiang,CHU Quan-gen,WANG Pan,et al.Co-Treatment of Phlegm and Stasis Improves Myocardial Inflammation in Rats with Diabetes Mellitus via TLR4/NF-κB/IκB Pathway[J].Chinese Journal of Experimental Traditional Medical Formulae,2021,27(22):59-64. DOI: 10.13422/j.cnki.syfjx.20212237.
Co-Treatment of Phlegm and Stasis Improves Myocardial Inflammation in Rats with Diabetes Mellitus via TLR4/NF-κB/IκB Pathway
To observe the intervention of phlegm-stasis co-treatment on the myocardial Toll-like receptor 4 (TLR4)/nuclear factor-
κ
B (NF-
κ
B)/nuclear factor-
κ
B inhibitor (I
κ
B) signaling pathway, and to investigate its mechanism in improving myocardial inflammation in rats with diabetes mellitus (DM).
Method
2
Forty-five male SD rats of SPF grade were randomly divided into a normal group, a phlegm-resolving (Xiao Xianxiongtang, 4.05 g·kg
-1
) group, a stasis-resolving (Xuefu Zhuyutang, 7.02 g·kg
-1
) group, a co-treatment (Didang Xianxiong decoction, 8.10 g·kg
-1
) group, an alagebrium chloride (3 mg·kg
-1
) group, and a model group. Except for normal group, the other rats was induced by a single intraperitoneal injection of 55 mg·kg
-1
streptozotocin (STZ) to establish DM model. After adaptive feeding for three weeks, the rats were treated correspondingly by gavage daily for eight weeks. Rats were sampled under anesthesia. Enzyme-linked immunosorbent assay(ELISA) was used to detect the protein expression of TLR4 and tumor necrosis factor-alpha (TNF-
α
) in myocardial tissues. The expression levels of NF-
κ
B p65 and I
κ
B
α
were detected by immunohistochemistry. NF-
κ
B p65, I
κ
B
α
, TNF-
α
, and TLR4 mRNA expression levels were detected by real-time fluorescence-based quantitative polymerase chain reaction(Real-time PCR).
Result
2
The protein and mRNA levels of TLR4, NF-
κ
B p65, I
κ
B
α
, and TNF-
α
were higher in the model group than those in the normal group (
P
<
0.01). TLR4, NF-
κ
B p65, I
κ
B
α
, and TNF-
α
protein and mRNA expression levels were reduced to varying degrees in the groups with drug intervention as compared with those in the model group (
P
<
0.01). The inter-group comparison revealed that the co-treatment group showed more manifest reduction in protein and mRNA expression levels of TLR4, NF-
κ
B p65, I
κ
B
α,
and TNF-
α
than the phlegm-resolving group and the stasis-resolving group (
P
<
0.05
,P
<
0.01).
Conclusion
2
The co-treatment of phlegm and stasis can improve myocardial inflammation in DM rats, with superior effect to either the phlegm-resolving method or the stasis-resolving method. The underlying mechanism may be related to the inhibition of TLR4/NF-
κ
B/I
κ
B signaling pathway activation.
关键词
Keywords
references
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