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Liriodenine Inhibits Dopamine Biosynthesis and L-DOPA-Induced Dopamine Content in PC12 Cells
Jin, Chun-Mei,Lee, Jae-Joon,Yang, Yoo-Jung,Kim, Yu-Mi,Kim, Young-Kyoon,Ryu, Shi-Yong,Lee, Myung-Koo 대한약학회 2007 Archives of Pharmacal Research Vol.30 No.8
The inhibitory effects of liriodenine, an aporphine isoquinoline alkaloid, on dopamine biosynthesis and L-DOPA-induced dopamine content increases in PC12 cells were investigated. Treatment of PC12 cells with 5-10 ${\mu}M$ liriodenine significantly decreased the intracellular dopamine content in a concentration-dependent manner ($IC_{50}$ value, 8.4 ${\mu}M$). Liriodenine was not cytotoxic toward PC12 cells at concentrations up to 20 ${\mu}M$. Tyrosine hydroxylase (TH) and aromatic L-amino acid decarboxylase (AADC) activities were inhibited by 10 ${\mu}M$ liriodenine to 20-70% and 10-14% of control levels at 3-12 h, respectively; TH activity was more influenced than AADC activity. The levels of TH mRNA, intracellular cyclic AMP and basal $Ca^{2+}$ concentration were also decreased by 10 ${\mu}M$ liriodenine. In addition, 10 ${\mu}M$ liriodenine reduced L-DOPA (20-100 ${\mu}M$)-induced increases in dopamine content. However, 10 ${\mu}M$ liriodenine resulted in a protective effect against L-DOPA (50-100 ${\mu}M$)-induced cytotoxicity. These results suggest that liriodenine regulates dopamine biosynthesis by partially reducing TH activity and TH gene expression and has protective effects against L-DOPA-induced cytotoxicity in PC12 cells.
Mei-rong Zhou,Zhong-hua Tang,Jing Li,Jin-Hu Fan,Yi Pang,Hong-jian Yang,Shan Zheng,Jing-qiao Bai,Ning Lv,You-Lin Qiao,Feng Xu,Hai-zhi Qi 한국유방암학회 2013 Journal of breast cancer Vol.16 No.1
Purpose: This study aims to analyze the clinical-pathological characteristics of multifocal and multicentric breast cancer (MMBC) in Chinese women. Methods: Sixty-seven cases with MMBC were randomly collected and reviewed at seven hospitals in representative districts of China during 1999 to 2008. Results: The incidence of MMBC in breast cancer in China was 1.75%. Compared to those with unifocal breast cancer, women with MMBC were more likely to have larger tumor size, lymph node metastasis (59.70% vs. 45.62%) and stage III to IV (46.26% vs. 21.10%). The peak age at onset of MMBC was 40 to 49 years old and has been gradually increasing during 1999 to 2008. Most of the MMBC women were treated with surgery and adjuvant therapy. Conclusion: In China, the incidence of MMBC in breast cancer is significantly lower than that in Western countries. Compared to unifocal breast cancer, MMBC is biologically more aggressive. Most MMBC women underwent mastectomy, instead of breast conservation surgery.
Yang, Shuo,Zhang, Jing,Jiang, Yang,Xu, Yuan Qing,Jin, Xiao,Yan, Su Mei,Shi, Bin Lin Asian Australasian Association of Animal Productio 2021 Animal Bioscience Vol.34 No.7
Objective: This research aimed to study the effects of Artemisia argyi flavonoids (AAF) supplemented in diets on the growth performance and immune function of broiler chickens challenged with lipopolysaccharide (LPS). Methods: A total of one hundred and ninety-two 1-d-old broiler chicks were assigned into 4 treatment groups, which were, respectively, fed a basal diet (control), fed a diet with 750 mg/kg AAF, fed a basal diet, and challenged with LPS, fed a diet with 750 mg/kg AAF, and challenged with LPS. Each treatment had six pens with 8 chicks per pen. On days 14, 16, 18, 20 (stress phase I) and 28, 30, 32, 34 (stress phase II), broilers were injected with LPS (500 ㎍/kg body weight) or an equivalent amount of saline. Results: The results demonstrated that dietary AAF significantly improved the body weight (d 21) and alleviated the decrease of average daily gain in broilers challenged with LPS on d 21 and d 35 (p<0.05). Dietary AAF increased bursa fabricius index, and dramatically attenuated the elevation of spleen index caused by LPS on d 35 (p<0.05). Furthermore, serum interleukin-6 (IL-6) concentration decreased with AAF supplementation on d 21 (p<0.05). Diet treatment and LPS challenge exhibited a significant interaction for the concentration of IL-1β (d 21) and IL-6 (d 35) in serum (p<0.05). Additionally, AAF supplementation mitigated the increase of IL-1β, IL-6 in liver and spleen induced by LPS on d 21 and 35 (p<0.05). This study also showed that AAF supplementation significantly reduced the expression of IL-1β (d 21) and nuclear transcription factor kappa-B p65 (d 21 and 35) in liver (p<0.05), and dietary AAF and LPS treatment exhibited significant interaction for the gene expression of IL-6 (d 21), toll like receptor 4 (d 35) and myeloid differentiation factor 88 (d 35) in spleen (p<0.05). Conclusion: In conclusion, AAF could be used as a potential natural immunomodulator to improve growth performance and alleviate immune stress in broilers challenged with LPS.
Mei Hong Zhu,Sung Jin Park,Hyun Jin Kim,Dong Ki Yang,Suk Hyo Suh,Insuk So,Ki Whan Kim 대한생리학회-대한약리학회 2002 The Korean Journal of Physiology & Pharmacology Vol.6 No.2
<P> Effects of oxidized low-density lipoprotein (ox-LDL), l-α-stearoyl-lysophosphatidylcholine (LPC), on intracellular Ca<SUP>2</SUP> concentration were examined in mouse endothelial cells by measuring intracellular Ca<SUP>2</SUP> concentration ([Ca<SUP>2</SUP>]<SUB>i</SUB>) with fura 2-AM and reverse transcription-polymerase chain reaction (RT-PCR). LPC increased [Ca<SUP>2</SUP>]<SUB>i</SUB> under the condition of 1.5 mM [Ca<SUP>2</SUP>]<SUB>o</SUB> but did not show any effect under the nominally Ca<SUP>2</SUP>-free condition. Even after the store depletion with 30μM 2,5-di-tert- butylhydroquinone (BHQ) or 30μM ATP, LPC could still increase the [Ca<SUP>2</SUP>]<SUB>i</SUB> under the condition of 1.5 mM [Ca<SUP>2</SUP>]<SUB>o</SUB>. The time required to increase [Ca<SUP>2</SUP>]<SUB>i</SUB> (about 1 minute) was longer than that for ATP-induced [Ca<SUP>2</SUP>]<SUB>i</SUB> increase (10∼30 seconds). LPC-induced [Ca<SUP>2</SUP>]<SUB>i</SUB> increase was completely blocked by 1μM La<SUP>3</SUP>. Transient receptor potential channel(trpc) 4 mRNA was detected with RT-PCR. From these results, we suggest that LPC increased [Ca<SUP>2</SUP>]<SUB>i</SUB> via the increase of Ca<SUP>2</SUP> influx through the Ca<SUP>2</SUP> routes which exist in the plasma membrane.
Shao-Mei Yang,Fu-Nan Li,Zhi-Ning Huang,Zhong-Shi Zhou,Jin Hou,Man-Yi Zheng,Li-Juan Wang,Yu Jiang,Xin-Yi Zhou,Qiu-Yue Chen,Shan-Hua Li 대한약학회 2015 Archives of Pharmacal Research Vol.38 No.10
To identify novel therapeutic agents to treatcancer, we synthesized a series of diaryl ether derivatives. Structure–activity relationship studies revealed that thepresence of a chlorine or hydroxyl at the para-position onthe phenyl ring (5h or 5k) significantly enhanced antitumoractivity. Compound 5h had stronger growth inhibitory activityin HepG2, A549, and HT-29 cells than compound 5k,with IC50 values of 2.57, 5.48, and 30.04 lM, respectively. Compound 5h also inhibited the growth of other cells lines,including Hep3B, PLC/PRF5, SMMC-7721, HeLa, andA375, with IC50 values of 2.76, 4.26, 29.66, 18.86, and10.21 lM, respectively. The antitumor activity of compound5h was confirmed by a colony forming assay. Further,our results indicated that the antitumor activity ofcompound 5h may be mediated by enhancing expression ofp21 and cl-caspase3, and leading to apoptosis of cancercells.
Zhu, Mei-Hong,Park, Sung-Jin,Kim, Hyun-Jin,Yang, Dong-Ki,Suh, Suk-Hyo,So, In-Suk,Kim, Ki-Whan The Korean Society of Pharmacology 2002 The Korean Journal of Physiology & Pharmacology Vol.6 No.2
Effects of oxidized low-density lipoprotein (ox-LDL), $1-{\alpha}-stearoyl-lysophosphatidylcholine$ (LPC), on intracellular $Ca^{2+}$ concentration were examined in mouse endothelial cells by measuring intracellular $Ca^{2+}$ concentration $([Ca^{2+}]_i)$ with fura 2-AM and reverse transcription-polymerase chain reaction (RT-PCR). LPC increased $[Ca^{2+}]_i$ under the condition of 1.5 mM $[Ca^{2+}]_o$ but did not show any effect under the nominally $Ca^{2+}-free$ condition. Even after the store depletion with $30{\mu}M$ 2,5-di-tert- butylhydroquinone (BHQ) or $30{\mu}M$ ATP, LPC could still increase the $[Ca^{2+}]_i$ under the condition of 1.5 mM $[Ca^{2+}]_o.$ The time required to increase [$Ca{2+}$]i (about 1 minute) was longer than that for ATP-induced $[Ca^{2+}]_i$ increase $(10{\sim}30\;seconds).$ LPC-induced $[Ca^{2+}]_i$ increase was completely blocked by $1{\mu}M\;La^{3+}.$ Transient receptor potential channel(trpc) 4 mRNA was detected with RT-PCR. From these results, we suggest that LPC increased $[Ca^{2+}]_i$ via the increase of $Ca^{2+}$ influx through the $Ca^{2+}$ routes which exist in the plasma membrane.