Jun Li

Shandong Academy of Sciences, Chi-nan-shih, Shandong Sheng, China

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Publications (12)20.34 Total impact

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    ABSTRACT: Background/aim: Inflammatory cytokines is a key point in the development of pathogenesis of SAP. Inflammatory mediators TNF-α and IL-6 are up-regulated in serum of patients with SAP and become good discriminators of SAP severity. Materials and methods: In this study, we investigated the treatment effectiveness of Baicalein on SAP rat model. Baicalein was intravenously injected immediately after SAP induction in rats. The mortality, histopathology score, ascites fluid volume, and pro-inflammatory cytokine production were evaluated at 12 h after SAP induction. Results: Baicalein decreased the pancreatic histopathology score, reduced ascites fluid production, protected against pancreatic injury, and improved survival in rats with SAP. The serum IL-6 and TNF-α concentrations were also down-regulated by Baicalein. Conclusion: Baicalein demonstrated a well curative capability on rats with SAP. The mechanism may be alleviateing pancreatic injury and inhibiting pro-inflammatory cytokines expression.
    Biochemical and Biophysical Research Communications 09/2015; 466(4). DOI:10.1016/j.bbrc.2015.09.094 · 2.30 Impact Factor
  • Jun Li · Rui Zhou · Jian Zhang · Zong-Fang Li ·
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    ABSTRACT: Pancreatitis is an increasingly common and sometimes severe disease that lacks a specific therapy. The pathogenesis of pancreatitis is still not well understood. Calcium (Ca(2+)) is a versatile carrier of signals regulating many aspects of cellular activity and plays a central role in controlling digestive enzyme secretion in pancreatic acinar cells. Ca(2+) overload is a key early event and is crucial in the pathogenesis of many diseases. In pancreatic acinar cells, pathological Ca(2+) signaling (stimulated by bile, alcohol metabolites and other causes) is a key contributor to the initiation of cell injury due to prolonged and global Ca(2+) elevation that results in trypsin activation, vacuolization and necrosis, all of which are crucial in the development of pancreatitis. Increased release of Ca(2+) from stores in the intracellular endoplasmic reticulum and/or increased Ca(2+) entry through the plasma membrane are causes of such cell damage. Failed mitochondrial adenosine triphosphate (ATP) production reduces re-uptake and extrusion of Ca(2+) by the sarco/endoplasmic reticulum Ca(2+)-activated ATPase and plasma membrane Ca(2+)-ATPase pumps, which contribute to Ca(2+) overload. Current findings have provided further insight into the roles and mechanisms of abnormal pancreatic acinar Ca(2+) signals in pancreatitis. The lack of available specific treatments is therefore an objective of ongoing research. Research is currently underway to establish the mechanisms and interactions of Ca(2+) signals in the pathogenesis of pancreatitis.
    World Journal of Gastroenterology 11/2014; 20(43):16146-16152. DOI:10.3748/wjg.v20.i43.16146 · 2.37 Impact Factor
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    ABSTRACT: Baicalein, a widely used Chinese herbal medicine, has historically been used in anti-inflammatory and anti-cancer therapies. However, the anti-metastatic effect and molecular mechanism(s) of baicalein on hepatocellular carcinoma (HCC) remain poorly understood. Therefore, the purpose of this study was to assess the anti-metastatic effects of baicalein and related mechanism(s) on HCC. Based on assays utilized in both HCC cell lines and in an animal model, we found that baicalein inhibited tumor cell metastasis in vivo and in vitro. Furthermore, after treatment with baicalein for 24 hours, there was a decrease in the levels of matrix metalloproteinase-2 (MMP-2), MMP-9 and urokinase-type plasminogen activator (u-PA) expression as well as proteinase activity in hepatocellular carcinoma MHCC97H cells. Meanwhile, the expression of tissue inhibitor of metalloproteinase-1 (TIMP-1) and TIMP-2 were increased in a dose-dependent fashion. Moreover, baicalein treatment dramatically decreased the levels of the phosphorylated forms of MEK1 and ERK1/2. MEK1 overexpression partially blocked the anti-metastatic effects of baicalein. Combined treatment with an ERK inhibitor (U0126) and baicalein resulted in a synergistic reduction in MMP-2, MMP-9 and u-PA expression and an increase in TIMP-1 and TIMP-2 expression; the invasive capabilities of MHCC97H cells were also inhibited. In conclusion, baicalein inhibits tumor cell invasion and metastasis by reducing cell motility and migration via the suppression of the ERK pathway, suggesting that baicalein is a potential therapeutic agent for HCC.
    PLoS ONE 09/2013; 8(9):e72927. DOI:10.1371/journal.pone.0072927 · 3.23 Impact Factor
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    ABSTRACT: Although significantly develops in hepatocellular carcinoma (HCC), features of HCC remain an aggressive cancer with a dismal outcome. Traditional Chinese medicine (TCM), specifically Chinese herbal medicine (CHM), is one of the most popular complementary and alternative medicine modalities worldwide. The use of heat-clearing and detoxicating (Chinese named qingre jiedu) CHM has attracted great attention as an alternative antitumor including HCC considering its low toxicity and high activity. Together these reports indicate that CHM is a promising anti-HCC herbal remedy in basic research. For patients with advanced HCC, CHM including formula and single combined with transcatheter arterial chemoembolization or chemotherapy is able to decrease tumor growth and the side effect of toxicity and improve overall survival, quality of life, and immune function. Due to its abundance, low cost, and safety in consumption, CHM remains a species with tremendous potential for further investigation in HCC.
    Evidence-based Complementary and Alternative Medicine 07/2013; 2013(31):268963. DOI:10.1155/2013/268963 · 1.88 Impact Factor
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    ABSTRACT: Recurrence of bladder cancer following transurethral resection of bladder tumor (TURBt) is an obstacle in clinical management. In the current study, we investigated the antitumor activity of baicalein, a Chinese herbal medicine, against T24 bladder cancer cells in vitro. Baicalein inhibited growth and caused G1/S arrest of the cell cycle in the T24 cells. Moreover, baicalein induced apoptosis via loss of mitochondrial transmembrane potential (ΔΨm), release of cytochrome c and activation of caspase-9 and caspase-3. Baicalein inhibited Akt phosphorylation, downregulated Bcl-2 expression and upregulated Bax expression, which in turn increased the ratio of Bax/Bcl-2. Our results demonstrate that baicalein repressed growth inhibition and induced apoptosis via loss of ΔΨm and activation of caspase-9 and caspase-3 in T24 bladder cancer cells, which indicates that baicalein may be an effective agent in the clinical management of bladder cancer.
    Molecular Medicine Reports 10/2012; 7(1). DOI:10.3892/mmr.2012.1123 · 1.55 Impact Factor
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    ABSTRACT: Baicalein is a purified flavonoid extracted from the roots of Scutellaria baicalensis or Scutellaria radix. Although previous studies have suggested that Baicalein possesses an in vitro anti-hepatocellular carcinoma activity, its in vivo effects and mechanisms of action are still not completely understood. In this study, Baicalein at concentrations of 40-120 µM exhibited significant cytotoxicity to three hepatocellular carcinoma (HCC) cell lines but marginal cytotoxicity to a normal liver cell line in vitro. Compared to a standard chemotherapy drug, 5-fluorouracil (5-FU), Baicalein had greater effect on HCC cells but less toxicity on normal liver cells. Treatment with Baicalein dramatically reduced mitochondrial transmembrane potential, and activated caspase-9 and caspase-3. Blockade of Baicalein-induced apoptosis with a pan-caspase inhibitor partially attenuated Baicalein-induced growth inhibition in HCC. Baicalein treatment significantly inhibited tumor growth of HCC xenografts in mice. Induction of apoptosis was demonstrated in Baicalein-treated xenograft tumors by the terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL) assay. Furthermore, Baicalein treatment dramatically decreased the levels of phosphorylation of MEK1, ERK1/2 and Bad in vitro and in vivo. Overexpression of human MEK1 partially blocked Baicalein-induced growth inhibition. Consequently, these findings suggest that Baicalein preferentially inhibits HCC tumor growth through inhibition of MEK-ERK signaling and by inducing intrinsic apoptosis.
    International Journal of Oncology 06/2012; 41(3):969-78. DOI:10.3892/ijo.2012.1510 · 3.03 Impact Factor
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    ABSTRACT: Two new neolignan glycosides, named pittogoside A (1) and pittogoside B (2) were isolated from the roots of Pittosporum glabratum Lindl. Their structures, including the absolute stereochemistry, were determined on the basis of spectroscopic analysis and chemical evidence, with combination of circular dichroism.
    Phytochemistry Letters 06/2012; 5(2):240–243. DOI:10.1016/j.phytol.2012.01.003 · 1.45 Impact Factor
  • He Chen · Hong Bai · Zhidong Wang · Hui li · Jianqin Liu · Jun li ·

    01/2012; DOI:10.12720/sgce.1.1.33-39
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    He Chen · Kai Feng · Quan Zhang · Zichen Zhao · Lin Zhang · Jun Li · Kehe Wu ·
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    ABSTRACT: With the aim of strengthening the construction of smart power grid, large investment will be put into power grid of China. Investment evaluation of power grid is necessary in this situation particularly in the light of escalating costs and financing cost. This paper presents the development of Investment Evaluation System with the help of Unified Information Platform to enhance the awareness the technical, economic and social benefits of power grid investment. The overall work flow of Investment Evaluation System and its important aspects, including indicator system, normalization, weighting factor and comprehensive evaluation are presented. The basic architecture of Unified Information Platform and the realization of data exchange are illustrated. Finally system realization and hardware deployment are provided.
    Energy Procedia 12/2011; 12:10–17. DOI:10.1016/j.egypro.2011.10.004
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    ABSTRACT: Hypersplenism is a condition in which the spleen is overactive. It is common in patients with cirrhosis-related portal hypertension. The over-activated hemophagocytic splenic macrophages are an important cause of hypersplenism. MicroRNAs (miRNAs) are 21-22 nt single-stranded RNAs expressed endogenously, which play important roles in many diseases. We have found by microarray, previously, that miR-615-3p is highly expressed in splenic macrophages of hypersplenism. In this study, we found that miR-615-3p enhanced the phagocytic capacity of splenic macrophages. Bioinformatics analysis indicated that ligand-dependent nuclear receptor corepressor (LCoR) was a potential phagocytosis-related target of miR-615-3p. This was proved by dual luciferase assay and Western blot in THP-1 cells and normal/hypersplenisum splenic macrophages. Our results showed that the presence of miR-615-3p repressed the expression of LCoR, a derepressor of peroxisome proliferator-activated receptor gamma (PPARγ), which has been confirmed to be able to promote the phagocytic capacity of macrophages. In conclusion, high expression of miR-615-3p in over-activated splenic macrophages depresses LCoR expression, low level of LCoR derepresses the expression of PPARγ and finally upregulated PPARγ enhances the phagocytic capacity of splenic macrophages. This finding might be useful in the study of hypersplenism and other macrophage-associated diseases.
    Experimental Biology and Medicine 06/2011; 236(6):672-80. DOI:10.1258/ebm.2011.010349 · 2.17 Impact Factor
  • He Chen · Jun Li · Feng Han · Hong Bai ·
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    ABSTRACT: Climate change and limited primary energy resources make China to increase renewable electricity generation to change the coal-dominated situation. China has rich wind power resource and great potential for utilization, nowadays the healthy development of wind power becomes a predominant problem, which will affect the future energy framework of China. Though many factors relate to Chinese wind power, the cooperation between wind generation and power transmission system is a critical one, current situation of out-of-step is caused by the astonished rate that wind generation proceeds as well as relative lag of transmission system in some specific areas, the noncooperation will impedes the rapid growth of domestic wind power industries. Without a robust and well-planned transmission system, wind power can not be consumed on a larger scope. This paper first outlines the current status of wind power and power system of China, and then indicates that unified transmission planning and inter-province/region transmission grid with the help of ultra high voltage (UHV) technique will be beneficial for enlarging the consuming market space and help the rapid and healthy development of China's wind power.
    10/2010; DOI:10.1109/IPECON.2010.5697165
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    ABSTRACT: To investigate the effects of Chrysanthemum indicum extract (CIE) on inhibition of proliferation and on apoptosis, and the underlying mechanisms, in a human hepatocellular carcinoma (HCC) MHCC97H cell line. Viable rat hepatocytes and human endothelial ECV304 cells were examined by trypan blue exclusion and MTT assay, respectively, as normal controls. The proliferation of MHCC97H cells was determined by MTT assay. The cellular morphology of MHCC97H cells was observed by phase contrast microscopy. Flow cytometry was performed to analyze cell apoptosis with annexin V/propidium iodide (PI), mitochondrial membrane potential with rhodamine 123 and cell cycle with PI in MHCC97H cells. Apoptotic proteins such as cytochrome C, caspase-9, caspase-3 and cell cycle proteins, including P21 and CDK4, were measured by Western blotting. CIE inhibited proliferation of MHCC97H cells in a time- and dose-dependent manner without cytotoxicity in rat hepatocytes and human endothelial cells. CIE induced apoptosis of MHCC97H cells in a concentration-dependent manner, as determined by flow cytometry. The apoptosis was accompanied by a decrease in mitochondrial membrane potential, release of cytochrome C and activation of caspase-9 and caspase-3. CIE arrested the cell cycle in the S phase by increasing P21 and decreasing CDK4 protein expression. CIE exerted a significant apoptotic effect through a mitochondrial pathway and arrested the cell cycle by regulation of cell cycle-related proteins in MHCC97H cells without an effect on normal cells. The cancer-specific selectivity shown in this study suggests that the plant extract could be a promising novel treatment for human cancer.
    World Journal of Gastroenterology 09/2009; 15(36):4538-46. · 2.37 Impact Factor

Publication Stats

96 Citations
20.34 Total Impact Points


  • 2012
    • Shandong Academy of Sciences
      Chi-nan-shih, Shandong Sheng, China
  • 2011-2012
    • Xi'an Jiaotong University
      • School of Medicine
      Ch’ang-an, Shaanxi, China
  • 2010-2011
    • State Grid Electric Power Research Institute
      Nan-ching-hsü, Jiangxi Sheng, China