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Journal of Chinese Integrative Medicine ›› 2007, Vol. 5 ›› Issue (3): 328-332.doi: 10.3736/jcim20070319

• Original Experimental Research • Previous Articles     Next Articles

Effects of Panax notoginseng saponins on mRNA expressions of interleukin-1β, its correlative factors and cysteinyl-aspartate specific protease after cerebral ischemia-reperfusion in rats

Ying-hong Tang1, Shu-ping Zhang2, Yan Liang2, Chang-qing Deng2   

  1. 1. Department of Pharmacology, College of Pharmacy, Hunan University of Traditional Chinese Medicine, Changsha, Hunan Province 410208, China
    2. Laboratory of Pathophysiology, Hunan University of Traditional Chinese Medicine, Changsha, Hunan Province 410007, China
  • Online:2007-05-31 Published:2007-05-15

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Objective: To investigate the effects of Panax notoginseng saponins (PNS) on mRNA expressions of interleukin-1β (IL-1β), interleukin-1 receptor type Ⅰ (IL-1RⅠ), interleukin-1 receptor antagonist (IL-1ra), intercellular adhesion molecule-1 (ICAM-1), cysteinyl-aspartate specific protease-1 (caspase-1), caspase-3 and caspase-8 after cerebral ischemia-reperfusion in rats.Methods: Focal cerebral ischemia reperfusion in rats was induced by the method of nylon monofilament via the internal carotid artery. PNS was administered intraperitoneally respectively five minutes before cerebral ischemia and twelve hours after cerebral ischemia. After cerebral ischemia for two hours followed by reperfusion for twenty two hours, the mRNA expressions of IL-1β, IL-1RⅠ, IL-1ra, ICAM-1, caspase-1, caspase-3 and caspase-8 in brain tissue were determined by reverse transcription polymerase chain reaction assay.Result: After cerebral ischemia for two hours followed by reperfusion for twenty two hours, the mRNA expression levels of IL-1β, IL-1RⅠ, IL- 1ra, ICAM-1, caspase-1, caspase-3 and caspase-8 in brain tissue in the untreated group were obviously elevated as compared to those in the sham-operation group (P＜0.05 or P＜0.01). The mRNA expression levels of IL-1β, IL-1RⅠ, IL-1ra in brain tissue in the PNS group were lower than those in the untreated group, but higher than those in the sham-operation group, and without statistical differences as compared to those in the sham-operation group and in the untreated group (P>0.05). The mRNA expression level of caspase-3 in brain tissue in the PNS group was significantly lower than that in the untreated group (P＜0.05), but PNS had no effect on the mRNA expression levels of ICAM-1, caspase-1 and caspase-8 in brain tissue.Conclusion: PNS can inhibit the mRNA expression of caspase-3, slightly inhibit the mRNA expressions of IL-1β and its correlative inflammatory factors in brain tissue. The protective effects of PNS on cerebral injury induced by ischemia-reperfusion may be related to inhibiting the mRNA expressions of caspase-3, IL-1β and its correlative inflammatory factors in brain tissue.

Key words: brain ischemia, reperfusion, interleukin-1β, interleukin-1, receptor, interleukin-1, caspase, reverse transcription polymerase chain reaction, rats

CLC Number: 

  • R743

Figure 1

Target genes atlasM: Marker; 1: Sham-operation group; 2: Untreated group; 3: PNS group."

Table 1

mRNA expression levels of IL-1β and its correlative factors in brain tissue in three groups （ヌ±S）"

GroupIL-1βIL-1RⅠIL-1raICAM-1
Sham-operation0.31±0.10 (5)0.30±0.28 (5)0.39±0.11 (5)0.54±0.17 (6)
Untreated0.76±0.41* (4)0.64±0.21* (4)0.81±0.23** (5)1.03±0.23* (4)
PNS0.52±0.24 (6)0.53±0.37 (5)0.50±0.44 (6)0.87±0.12* (5)

Table 2

mRNA expression levels of caspase-1 , caspase-3 and caspase-8 in brain tissue in three groups（ヌ±S）"

GroupmRNA expression levels
Caspase-1Caspase-3Caspase-8
Sham-operation0.85±0.25 (5)1.06±0.09 (4)0.25±0.30 (4)
Untreated1.38±0.31* (4)1.32±0.16* (4)0.63±0.24* (5)
PNS1.10±0.24 (5)1.06±0.25△ (4)0.66±0.16* (6)
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