Effect of Erzhi Pill (二至丸) of Different Dosing Time on the Expression of Biological Clock-related Factors Bmal1 and Cry1 in the Liver Tissue of Aging Liver Injury Model Mice
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Effect of Erzhi Pill (二至丸) of Different Dosing Time on the Expression of Biological Clock-related Factors Bmal1 and Cry1 in the Liver Tissue of Aging Liver Injury Model Mice
Journal of Traditional Chinese MedicineVol. 64, Issue 4, Pages: 387-392(2023)
MA Xiangyu,GONG Yuqing,WEI Xinyi,et al.Effect of Erzhi Pill (二至丸) of Different Dosing Time on the Expression of Biological Clock-related Factors Bmal1 and Cry1 in the Liver Tissue of Aging Liver Injury Model Mice[J].Journal of Traditional Chinese Medicine,2023,64(04):387-392.
MA Xiangyu,GONG Yuqing,WEI Xinyi,et al.Effect of Erzhi Pill (二至丸) of Different Dosing Time on the Expression of Biological Clock-related Factors Bmal1 and Cry1 in the Liver Tissue of Aging Liver Injury Model Mice[J].Journal of Traditional Chinese Medicine,2023,64(04):387-392.DOI: 10.13288/j.11-2166/r.2023.04.013.
Effect of Erzhi Pill (二至丸) of Different Dosing Time on the Expression of Biological Clock-related Factors Bmal1 and Cry1 in the Liver Tissue of Aging Liver Injury Model Mice
(二至丸) given at different times on the liver injury of aging mice.
Methods
2
Sixty C57 male mice were randomly divided into normal control group, model group and four
Erzhi Pill
groups of 1:00, 7:00, 13:00 and 19:00, with ten mice in each group. Except for the normal control group, mice were given subcutaneous injected of D-galactose (D-gal) at a dose of 300 mg·kg
-1
·d
-1
for 56 consecutive days to establish the aging liver injury model. The
Erzhi Pill
groups were given 2.5 g·kg
-1
Erzhi pill
at different time (1:00, 7:00, 13:00, 19:00) from the 11th day of modelling and lasted for 46 days. Meanwhile, the mice in the normal control group and model group were given 0.01 ml·g
-1
of normal saline by gavage. The serum levels of alanine transaminase (ALT), aspartate aminotransferase (AST), catalase (CAT), superoxide dismutase (SOD), and malonic dialdehyde (MDA) were detected. The HE staining was used to assess the pathological changes of liver tissue. The protein expression of Bmal1 and Cry1 in liver were detected by Western blot.
Results
2
Compared to those in the normal control group, the liver tissue of the mice in the model group showed extensive edema-like changes, nuclear pyknosis and deep staining, and disorderly arranged hepatic cords; the serum levels of ALT, AST and MDA in the model group increased significantly (
P
<0.01), while serum SOD and CAT levels decreased, as well as the protein expression of Bmal1 and Cry1 in the liver tissue (
P
<0.01). Compared to those in the model group, the liver histopathological changes were significantly improved in the
Erzhi Pill
1:00 group and 7:00 group, with significantly decreased ALT, AST and MDA levels and increased SOD, CAT levels and protein expression of Bmal1 and Cry1 (
P
<0.05 or
P
<0.01); there were severe pathological damage in the liver tissue in the
Erzhi Pill
13:00 group 19:00 group, both having no significant differences in serum ALT, AST, SOD, CAT and MDA levels and Cry1 protein expression compared to the model group (
P
>0.05); the
Erzhi Pill
19:00 group had higher Bmal1 protein expression than the model group (
P
<0.05). Compared to those in the
Erzhi Pill
1:00 group, the serum ALT and AST levels in the
Erzhi Pill
7:00 group significantly increased, while the Bmal1 and Cry1 protein le-vels in the
Erzhi Pill
7:00 group, and the Bmal1 protein level in the
Erzhi Pill
19:00 group significantly decreased (
P
<0.01).
Conclusion
2
Erzhi Pill
shows significant protective effect against aging liver injury induced by D-gal in mice, with obvious difference in the pharmacological effect when given at different times, among which administration at 1:00 works best. The mechanism may be related to oxidative stress and improvement of biological clock disorder.
关键词
Keywords
references
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