Scientia Agricultura Sinica ›› 2019, Vol. 52 ›› Issue (18): 3271-3278.doi: 10.3864/j.issn.0578-1752.2019.18.018

• Nutrition-Enuironment Relationship Study • Previous Articles    

Effects of Artemisia annua Extracts on CLA Synthesis and Mechanism

WANG LiFang,ZHANG XingFu   

  1. Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences, Hohhot 010031
  • Received:2019-01-24 Accepted:2019-08-16 Online:2019-09-16 Published:2019-09-23

Abstract:

【Objective】The effects of Artemisia annua extracts (AAE) on gene SCD, ACACA, FASN and LPL related to CLA and milk fat synthesis in the bovine mammary epithelial cells(BMECs) culture in vitro were studied in this paper. The purpose of this study was to explore the effects of AAE on the part mechanism of effecting CLA synthesis from the mammary.【Method】 We isolated BMEC by using tissue fragments from the mammary gland of a healthy Holstein cows in Mid lactation. The cells used in the experiment were the second generation ones which have been resuscitated. The cells were inoculated into 24-well plates at a density of 3×10 4 cells/mL and cultured at 37℃ in a 5% CO2 atmosphere. The cells were counted by trypan blue counting method once a day. The experiment lasted for 7 d to draw the growth curve of the cells with three replicates, and the uncounted groups changed liquid every 2 d. When the cells grew to logarithmic proliferation stage, fresh culture medium was replaced and randomly divided into four groups, and the concentration of AAE in culture medium was 0, 3.0, 6.0, and 12.0 mg·L -1 individually for 48 h. The effects of different concentration of AAE on the gene expression of SCD, ACC, FAS and LPL related to fatty acid synthesis were detected. Each treatment was repeated for three times. 【Result】 The results showed as follows: the morphology and the growth curve for the BMECS looked like paving appearance and S-shaped respectively at 3×10 4 cfu/mL. The latent period and the exponential growth period for the BMECS was 1-2 d and 3-6 d, respectively, and then in the plateau stage, which were accorded with the general cells growth curve rule and showed that the cultured mammary epithelial cells had normal proliferation ability as used in the subsequent researches. Compared with the control group, there was the trend that AAE supplementation increased the expression of SCD enzyme gene, 3 mg·L -1 group significantly increased the expression of SCD gene (P<0.05), while the 6 mg·L -1 group and the 12 mg·L -1 group increased the expression of SCD gene, but there was no significant difference compared with the control group (P>0.05). The addition of AAE increased the expression of ACACA gene in mammary epithelial cells (P>0.05). The addition of AAE increased the expression of FASN gene with a dose-dependent manner, the 12mg·L -1 group increased the expression of FASN gene significantly (P<0.05). There was the trend that AAE supplementation decreased the expression of LPL enzyme gene with a dose-dependent manner, and the 6 mg·L -1 group and the 12 mg·L -1 group decreased the expression of LPL gene significantly (P<0.05). 【Conclusion】 It was concluded that AAE supplementation could increase the expression of SCD, ACACA and FASN genes in BMECS, which was beneficial to CLA synthesis.

Key words: Artemisia annua extracts, BMECS, SCD, ACACA, FASN, LPL

Table 1

Primer sequence of fatty acid synthesis related enzymes gene used for real-time PCR"

基因名称
Gene
引物序列
Primer sequence
Gene bank序列号
Gene bank accessions No.
扩增片段
Amplicon size (bp)
内参基因 β-Actin F. 5′-AACTCCATCATGAAGTGTGACG NM_173979.3 214
R. 5′- GATCCACATCTGCTGGAAGG
硬脂酰辅酶A去饱和酶 SCD F. 5′- TCCTGTTGTTGTGCTTCATCC AY241933 101
R. 5′- GGCATAACGGAATAAGGTGGC
乙酰辅酶A羧化酶 ACACA F. 5′- CATCTTGTCCGAAACGTCGAT AJ132890 101
R. 5′- CCCTTCGAACATACACCTCCA
脂肪酸合成酶 FASN F. 5′-ACCTCGTGAAGGCTGTGACTCA CR552737 92
R. 5′-TGAGTCGAGGCCAAGGTCTGAA
脂蛋白酯酶 LPL F. 5′- ACACAGCTGAGGACACTTGCC BC118091 101
R. 5′- GCCATGGATCACCACAAAGG

Fig. 1

The growth curve of mammary epithelial cells"

Fig. 2

Effect of Artemisia annua extracts on the SCD gene in bovine mammary epithelial cells Values in the figure with different small letter superscripts mean significant difference (P<0.05). The same as below"

Fig. 3

Effects of supplementation of Artemisia annua extracts on the expression of genes associated with the fatty acid synthesis in bovine mammary epithelial cells"

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