1.Association between smoking and risk of primary biliary cirrhosis: a meta-analysis
Journal of Clinical Hepatology 2015;31(10):1625-1629
ObjectiveTo systematically evaluate the association between smoking and the risk of primary biliary cirrhosis (PBC) from the perspective of evidence-based medicine. MethodsA literature search was performed in PubMed, EMBASE, CBM, CNKI, Wanfang Data, and VIP database to collect the case-control studies on the association between smoking and the risk of PBC published in the last two decades. Chinese search words were “吸烟”, “香烟”, “原发性胆汁性肝硬化”, “危险因素”, “队列研究”, and “病例对照研究”, and English search words were “smoking”, “cigarette”, “tobacco”, “risk factors”, “primary biliary cirrhosis”, “cohort studies”, and “case-control studies”. And then a meta-analysis was performed using Review Manager 5.2. The pooled odds ratio (OR) and 95% confidence interval (CI) were calculated, and the publication bias was analyzed by funnel plots. ResultsA total of 7 case-control studies involving 5459 subjects (2652 patients with PBC vs 2807 controls) were included in the meta-analysis. The analysis results showed that smokers had a significantly higher risk of PBC compared with non-smokers (OR=1.49, 95% CI: 1.11-2.00, P=0.009). The geographical subgroup analysis results showed that there was a significant difference in the risk of PBC between non-smokers and smokers in North America (OR=1.57, 95% CI: 1.20-2.04, P=0.0008). However, there was no significant difference in the risk of PBC between non-smokers and smokers in Europe (OR=1.41, 95% CI: 0.73-2.73, P=0.31). ConclusionSmoking can increase the risk of PBC. However, it needs to be confirmed in high-quality prospective studies with larger samples because of the heterogeneity of current included studies.
2.Predictive Value of CD44v6 and EGFR Expression in Neoadjuvant Chemotherapy Sensitivity of Stage Ⅱ-Ⅲ Cervical Cancer
Wanli MAO ; Li RAN ; Jiehui LI ; Fenghu LI ; Jianying CHANG ; Junyu MU ; Fan MEI ; Lili HU ; Yanjun DU ; Xue TIAN ; Yao QIN ; Shuishui YIN
Cancer Research on Prevention and Treatment 2022;49(9):937-943
Objective To explore the predictive value of the expression of CD44v6 and EGFR on the efficacy of neoadjuvant chemotherapy (NACT) in stageⅡ-Ⅲ cervical cancer. Methods A total of 53 patients with stageⅡ-Ⅲ cervical cancer diagnosed by pathology were selected. All patients received two cycles of paclitaxel+platinum NACT. The pathological tissue samples of cervical tumors before NACT treatment were collected. The expression of CD44v6 and EGFR were detected by the immunohistochemical SP method, and we analyzed their predictive value of NACT in stageⅡ-Ⅲ cervical cancer. Results Among the 53 patients, 38 were in the NACT effective group (CR+PR), and 15 were in the NACT ineffective group (SD+PD). The expression of CD44v6 in the ineffective group was significantly higher than that in the effective group (
3.Research progress on signal pathways in hepatic fibrosis and targeted regulation mechanisms of active ingredients from traditional Chinese medicine
Wenyan FAN ; Junyu HAO ; Hongxiu CHEN ; Guangwei LIU
Journal of Clinical Hepatology 2022;38(11):2599-2605
Hepatic fibrosis is a common pathological stage of many chronic liver diseases. Activation of hepatic stellate cells is considered as a key event in the progression of hepatic fibrosis. The pathogenesis of liver fibrosis is modulated by various cytokines involved in several signal pathways, including NF-κB, TGF-β/Smad, Wnt/β-catenin, Hedgehog etc. With the rapid development of modern pharmacology and biotechnology, the underlying molecular mechanism of anti-liver fibrosis of active components from traditional Chinese medicine has been further elucidated. This article summarizes scientific outcomes of signal pathways involved in liver fibrosis and how active components of Chinese herbal medicines exhibit anti-liver fibrosis effects, aiming to provide a potential drug candidate as a treatment for liver fibrosis and to open up a new research field of therapeutics for liver fibrosis.
4.Concomitant use of immobilized uridine-cytidine kinase and polyphosphate kinase for 5'-cytidine monophosphate production.
Sijia WU ; Jie LI ; Chenlong HU ; Junyu TIAN ; Tong ZHANG ; Ning CHEN ; Xiaoguang FAN
Chinese Journal of Biotechnology 2020;36(5):1002-1011
Uridine-cytidine kinase, an important catalyst in the compensation pathway of nucleotide metabolism, can catalyze the phosphorylation reaction of cytidine to 5'-cytidine monophosphate (CMP), but the reaction needs NTP as the phosphate donor. To increase the production efficiency of CMP, uridine-cytidine kinase gene from Thermus thermophilus HB8 and polyphosphate kinase gene from Rhodobacter sphaeroides were cloned and expressed in Escherichia coli BL21(DE3). Uridine-cytidine kinase was used for the generation of CMP from cytidine and ATP, and polyphosphate kinase was used for the regeneration of ATP. Then, the D403 metal chelate resin was used to adsorb Ni²⁺ to form an immobilized carrier, and the immobilized carrier was specifically combined with the recombinant enzymes to form the immobilized enzymes. Finally, single-factor optimization experiment was carried out to determine the reaction conditions of the immobilized enzyme. At 30 °C and pH 8.0, 60 mmol/L cytidine and 0.5 mmol/L ATP were used as substrates to achieve 5 batches of high-efficiency continuous catalytic reaction, and the average molar yield of CMP reached 91.2%. The above method has the advantages of low reaction cost, high product yield and high enzyme utilization rate, and has good applied value for industrial production.
Cytidine Monophosphate
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metabolism
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Escherichia coli
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genetics
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Industrial Microbiology
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methods
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Phosphotransferases (Phosphate Group Acceptor)
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metabolism
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Uridine Kinase
5.Research advances in effective constituents of traditional Chinese medicine in intervention of autoimmune hepatitis-related signaling pathways
Junyu HAO ; Guangwei LIU ; Lu XIE ; Wenyan FAN ; Hongxiu CHEN
Journal of Clinical Hepatology 2023;39(3):663-670
As a chronic liver inflammation disease caused by the lack of immune tolerance, autoimmune hepatitis is regulated by various signaling pathways, such as the NF-κB/NLRP3 pathway, the SIRT1/Nrf2/HO-1 pathway, the Hippo-YAP/TAZ pathway, the JAK/STAT pathway, the PI3K/Akt pathway, and the TRAF6/JNK pathway. These pathways can play a role against autoimmune hepatitis by participating in the processes including the proliferation and apoptosis of cytokines, immune response, and oxidative stress. In view of the problems of suboptimal response, obvious adverse reactions, and high recurrence rate in the clinical application of hormones and immune preparations for the treatment of autoimmune hepatitis, this article summarizes the research articles on autoimmune hepatitis-related signaling pathways and the mechanism of effective constituents (glycosides, terpenoids, flavonoids, quinones, and phenols) in traditional Chinese medicine intervening against the disease process of autoimmune hepatitis through the above signaling pathways, in order to provide a theoretical basis for scientific and effective utilization of effective constituents in traditional Chinese medicine to develop anti-autoimmune hepatitis drugs.
6.Advances in the physiological functions of plant lipids in response to stresses.
Junyu LIU ; Fan YANG ; Shuang MAO ; Shuxin LI ; Haijiao LIN ; Xiufeng YAN ; Jixiang LIN
Chinese Journal of Biotechnology 2021;37(8):2658-2667
Lipids are important components of living organisms that participate in and regulate a variety of life activities. Lipids in plants also play important physiological functions in response to a variety of abiotic stresses (e.g. salt stress, drought stress, temperature stress). However, most research on lipids focused on animal cells and medical fields, while the functions of lipids in plants were overlooked. With the rapid development of "omics" technologies and biotechnology, the lipidomics has received much attention in recent years because it can reveal the composition and function of lipids in a deep and comprehensive way. This review summarizes the recent advances in the functions and classification of lipids, the development of lipidomics technology, and the responses of plant lipids against drought stress, salt stress and temperature stress. In addition, challenges and prospects were proposed for future lipidomics research and further exploration of the physiological functions of lipids in plant stress resistance.
Droughts
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Gene Expression Regulation, Plant
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Lipids
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Plants
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Stress, Physiological
7.Review on role of NLRP3 inflammasome in pathogenesis of silicosis
Zhenzhen FAN ; Yehong ZHAO ; Bing LI ; Yang LIU ; Junyu JIANG ; Min MU ; Xinrong TAO
Journal of Environmental and Occupational Medicine 2022;39(8):931-936
Silicosis is one of the most common forms of pneumoconiosis globally. Workers who engage in mining, construction, ceramics, and many other industries have a high risk of developing silicosis. Chronic and repeated inhalation of free silica (SiO2) dust (<5 μm) during working can lead to inflammatory reactions, resulting in interstitial lung disease characterized by extensive nodular fibrosis in both lungs. Once silicosis occurs, it will develop progressively even when the workers are removed from the silica dust environment. The pathogenesis of silicosis is complex, especially the role of nod-like receptor family protein 3 (NLRP3) inflammasome in the pathogenesis and progression of silicosis remains to be further studied. NLRP3 inflammasome, a multi-protein complex composed of NLRP3, apoptosis-associated speck-like protein, and cysteinyl aspartate specific proteinase 1 is involved in oxidative stress, inflammatory response, apoptosis, and pyroptosis, and has become one of the hot spots in silicosis research. This review summarized the structure, function, and activation mechanism of NLRP3 inflammasome. Furthermore, the cellular and molecular mechanisms of NLRP3 in mediating oxidative stress, inflammatory response, apoptosis, and pyroptosis in the progression of silicosis were reviewed. Finally, the potential therapeutic drugs for silicosis based on NLRP3-associated mechanisms were outlined. More attention should be paid to the role of NLRP3 inflammasome in the pathogenesis and progression of silicosis in the future, which will provide new ideas for the prevention and treatment of silicosis.