HOU Dan,HUANG Shuai-yang,LYU Ming-sheng,et al.Effect and Mechanism of Sangmei Zhike Granule on Airway Inflammation in Rats with Cough Variant Asthma[J].Chinese Journal of Experimental Traditional Medical Formulae,2022,28(02):62-66.
HOU Dan,HUANG Shuai-yang,LYU Ming-sheng,et al.Effect and Mechanism of Sangmei Zhike Granule on Airway Inflammation in Rats with Cough Variant Asthma[J].Chinese Journal of Experimental Traditional Medical Formulae,2022,28(02):62-66. DOI: 10.13422/j.cnki.syfjx.20212223.
Effect and Mechanism of Sangmei Zhike Granule on Airway Inflammation in Rats with Cough Variant Asthma
To explore the effect and mechanism of Sangmei Zhike granule (SMZK) on airway inflammation in rats with cough variant asthma(CVA).
Method
2
Six-week-old male SD rats were randomly divided into normal group, model group, and SMZK (2.48 g·kg
-1
) group. The rats in the model group and the SMZK group received intraperitoneal injection of a mixed solution containing 10% ovalbumin (OVA) and aluminium hydroxide on the 1
st
and 8
th
days and aerosol inhalation of 1% OVA solution from the 15
th
day for CVA model induction. The intervention lasted for two weeks from the 15
th
day. At the end of animal manipulation, the lung function was detected and inflammatory cells in the peripheral blood were counted. The serum interleukin-4 (IL-4), interleukin-5 (IL-5), and interleukin-10 (IL-10) levels were determined. Hematoxylin-eosin (HE) staining was performed on the lungs. Western blot was used to detect the protein expression of nuclear factor kappa-B (NF-
κ
B) and its inhibitor
α
(I
κ
B
α
) in lung tissues.
Result
2
Compared with the normal group, the model group showed reduced forced expiratory volume in the first 0.1 second (FEV
0.01), increased white blood cells and eosinophils (
P
<
0.01), and up-regulated serum IL-4, IL-5, and IL-10 (
P
<
0.01). As revealed by HE staining, the model group displayed shed epithelial cells of the bronchus, airway stenosis, hyperplasia and expansion of mucous glands, disarrangement of layer structures, disorderly arranged cells, and extensive infiltration of inflammatory cells. The protein expression of NF-
κ
B p65 was higher (
P
<
0.01) and that of I
κ
B
α
was lower (
P
<
0.01) in the lung tissues of the model group than that in the normal group. Compared with the model group, the SMZK group showed increased FEV
0.1
,FEV
0.1
/FVC,and FEF50% (
P
<
0.05), decreased white blood cells and eosinophils in the peripheral blood (
P
<
0.01), and declining serum IL-4, IL-5, IL-10 (
P
<
0.01). HE staining demonstrated mild bronchial mucosal injury and relieved inflammatory cell infiltration, gland hyperplasia, and epithelial degeneration and necrosis in the SMZK group. The protein expression of NF-
κ
B p65 was decreased (
P
<
0.05) and that of I
κ
B
α
was increased (
P
<
0.05) in lung tissues of the SMZK group than that in the model group.
Conclusion
2
SMZK can improve lung function and inhibit airway inflammation in rats with CVA. The underlying mechanism may be related to the regulation of I
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