Pyrrolidine dithiocarbamate inhibition of luteolin-induced apoptosis through up-regulated phosphorylation of Akt and caspase-9 in human leukemia HL-60 cells     

Cheng AC  Huang TC  Lai CS  Kuo JM  Huang YT  Lo CY  Ho CT  Pan MH 《Journal of agricultural and food chemistry》2006,54(12):4215-4221

Previously, we observed that luteolin effectively inhibited cell growth and induced apoptosis in HL-60 cells. In that study, we also explored the modulatory effects and molecular mechanisms of pyrrolidine dithiocarbamate (PDTC) on the cytotoxicity of luteolin to HL-60 cells. In this study, we found that PDTC was able to inhibit luteolin-induced cell apoptosis in a dose-dependent manner. When HL-60 cells were treated with PDTC for 0.5 h before 60 microM luteolin treatment, the DNA ladder disappeared. Moreover, flow cytometry showed that PDTC had dose dependently decreased the percentage of apoptotic HL-60 cells and had not interfered with luteolin's ability to change the mitochondrial membrane potential or its ability to trigger the release of cytochrome c to cytosol. Detection by Western blotting, however, did show that PDTC had interfered with luteolin's ability to cleave poly(ADP-ribose)polymerase and DNA fragmentation of factor-45. Three hours after the PDTC-pretreated HL-60 cells were treated with 60 microM luteolin, the product cleaved from Akt started to appear. Therefore, not only was PDTC able to stop the apoptosis of HL-60 cells treated with luteolin, it was also found to increase phosphorylation of Akt and caspase-9. These results suggest that in the luteolin-induced apoptotic pathway, phosphorylation of procaspase-9 by survival signals might play an important role in the ultimate fate of HL-60 cells.  相似文献   

Initial transcription by RNA polymerase proceeds through a DNA-scrunching mechanism     

Kapanidis AN  Margeat E  Ho SO  Kortkhonjia E  Weiss S  Ebright RH 《Science (New York, N.Y.)》2006,314(5802):1144-1147

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Cytogenetic analysis of hybrids and hybrid triploids between the river puffer,Takifugu obscurus,and the tiger puffer,Takifugu rubripes          下载免费PDF全文

Gwang Yeol Yoo  Tae Ho Lee  Hyun Woo Gil  Sang Gu Lim  In‐Seok Park 《Aquaculture Research》2018,49(2):637-650

Cytogenetic analyses of the river puffer, Takifugu obscurus, the tiger puffer, Takifugu rubripes and hybrids produced between female T. obscurus and male T. rubripes and their hybrid triploids (produced by cold shock treatment at 4°C) were performed. T. obscurus had 2n = 44 chromosomes and 1.84 ± 0.019 pg DNA/cell, T. rubripes had 2n = 44 and 2.64 ± 0.015, the hybrids had 2n = 44 and 2.15 ± 0.010 and the hybrid triploids had 3n = 66 and 3.22 ± 0.010. The erythrocyte values of the hybrids were more similar to those for T. obscurus, whereas the hepatocyte, midgut and proximal tubule kidney cell values of the hybrids fell down between those for the parental species (p < .05). The erythrocyte, proximal tubule, hepatocyte and midgut epithelial cell sizes for the hybrid triploids were 1.5‐fold larger than those for the hybrids (p < .05). The thickness of retina and each layer in the hybrid triploids were 1.1‐fold larger than those of the hybrids (p < .05) and did not differ significantly among T. obscurus, T. rubripes and the hybrids (p > .05); however, the hybrid triploids had fewer cell nucleus outer layers than the hybrids (p < .05). Gonad development in the hybrids and hybrid triploids was less matured than in T. obscurus and T. rubripes. The metaphase nucleolus organizer regions (NORs) and the gill cells of T. obscurus, T. rubripes and the hybrids contained two satellite telocentrics, whereas the hybrid triploids contained three satellite telocentrics.  相似文献   

Low body fat content prior to declining day length in the autumn significantly increased growth and reduced weight dispersion in farmed Atlantic salmon Salmo salar L.          下载免费PDF全文

Kjell‐Arne Rørvik  Jens‐Erik Dessen  Magnus Åsli  Magny S Thomassen  Kjellrun G Hoås  Turid Mørkøre 《Aquaculture Research》2018,49(5):1944-1956

Based on the regulatory effects of body fat on appetite and seasonal variations in fat deposition and growth of Atlantic salmon, the present study tested the hypothesis that body fat content prior to declining day length in the autumn can significantly modulate growth rate. The growth rate of salmon (mean initial body weight, BW = 2.3 kg) with different muscle fat content prior to autumn, subjected to natural photoperiod and temperature, during a 7‐month period (mean final BW = 6.6 kg) was studied. In August, three fish groups (HF, LF and 0.5LF group) with significantly different muscle fat content (HF = 16.4%, LF = 13.2% and 0.5LF = 11.3%), individually marked with PIT‐tag, were mixed into the four net‐pens and fed a standard high‐energy diet until March the following year. The muscle fat content prior to the autumn had a highly significant (p < .0001) effect on growth during the 7‐month main‐dietary period, even after identical fat stores among the groups were restored, indicating a more complex explanation than just a lipostatic regulation mechanism. Mean thermal growth coefficients were HF = 2.9, LF = 3.4 and 0.5 LF = 3.9, resulting in increased final weight gain for LF and 0.5LF of 590 g and 980 g, respectively, compared to the HF group. The LF groups obtained a significantly higher homogeneity in BW and shape than HF‐fed fish in March, optimizing automatic gutting and filleting at slaughter. The improved growth response among the LF groups by reducing lipid levels can potentially be utilized in closed and semi‐closed production units where photoperiod can be manipulated.  相似文献   

Supplementation of protease,alone and in combination with fructooligosaccharide to low protein diet for finishing pigs          下载免费PDF全文

Xin Jian Lei  Jin Young Cheong  Jae Hong Park  In Ho Kim 《Animal Science Journal》2017,88(12):1987-1993

Effects of adding protease with or without fructooligosaccharide (FOS) to low protein diet on growth performance, nutrient digestibility and fecal noxious gas emission were evaluated in 160 finishing pigs (57.70 ± 1.16 kg) in a 9‐week study. Pigs were randomly divided into four dietary treatments, PC: positive control diet (15.97% crude protein (CP)); NC: negative control diet (12.94% CP); PRO: NC supplemented with 0.05% protease; PROFOS: NC supplemented with 0.05% protease and 0.1% FOS. During weeks 4–9 and weeks 0–9, gain : feed ratio was impaired (P < 0.05) in pigs fed NC diet compared with those fed PC, PRO and PROFOS diets. Pigs fed PC, PRO and PROFOS diets had higher (P < 0.05) apparent total tract digestibility (ATTD) of CP than pigs fed NC diet. Pigs fed PROFOS diet had reduced (P < 0.05) ammonia emissions compared to pigs fed NC and PRO diets. These data indicate that reducing dietary CP concentrations impaired growth performance, decreased ATTD of CP and reduced ammonia emissions. Supplementation of protease in low CP diet improved growth performance and increased ATTD of CP. Dietary supplementation with protease and FOS in low CP diet improved growth performance, increased ATTD of CP and decreased fecal ammonia emission.  相似文献   

Effect of Vermicompost in Media on Growth,Yield and Fruit Quality of Cherry Tomato (Lycopersicon esculentun Mill.) Under Net House Conditions     

Ha Duy Truong  Chong Ho Wang  Tran Trung Kien 《Compost science & utilization》2018,26(1):52-58

Effects of VC application on tomato production and media properties can last for the third successive season, which was verified in this study to evaluate effects of VC application on growth, productivity and fruit quality of cherry tomato for the third season. Six treatments were designed similarly in the first and second seasons (unchanged design compared to the previous season), including: VC with rice husk ash (RHS) and coconut fiber (CF) 0% VC+ 50% RHS +50% CF (T1- control), respectively. 20%VC + 40% RHS + 40% CF(T2), 40% VC+ 30% RHS + 30% CF(T3), 60% VC + 20% RHS + 20% CF(T4), 80% VC + 10% RHS + 10% CF(T5), and 100% VC(T6). The results showed that the pH, EC, N, P, K, Ca, and Mg available in media were increased with the addition of VC. This finding revealed that the addition of VC significantly improved the physic-chemical media properties, increasing the EC and also increasing the macronutrients in the media resulting in substantial increased the yield and quality of tomato fruits. It is concluded that EC of VC was the key factor for the positive increase of the productivity and quality of tomato and the salinity (EC at 3.52 dS/m) causing restriction of water to fruits that resulted in the increase of the total soluble solids in tomato fruit and without affecting yield reduction.  相似文献   

Effects of Continuously Applied Vermicompost on Media Properties,Growth, Yield,and Fruit Quality of Two Tomato Varieties     

Ha Duy Truong  Chong Ho Wang  Tran Trung Kien 《Communications in Soil Science and Plant Analysis》2017,48(4):370-382

In the first and second seasons, growth and yield of tomato were also influenced by different vermicompost (VC) rates and reused VC. Obviously, increasing VC proportion led to the augmentation of electrical conductivity (EC), nitrogen (N), phosphorus (P), potassium (K), calcium (Ca), and magnesium (Mg) in planting media in both seasons. However, in the first season, the nutrient absorbent ability of tomato was remarkably higher compared to those in the second season due to higher available nutrient in the media of the first season. This may influence the shoot dry weight as well as the yield of tomato in both seasons. In T4 treatment, the yield attained the highest value in the first season for both varieties with the values of 562.3 and 812.4 g/plant for small honey (V1) and graces (V2), respectively. In the second season, the N, P, K, Ca, and Mg in media significantly decreased compared to those in the first season (496.4 g/plant-V1 and 508.3 g/plant-V2). In comparison, the yields in the first season were higher those in second season by 13.2% and 59.8% for V1 and V2, respectively. However, in the second season, the maximum yield found in T5 (508.3 g/plant-V1 and 682.2 g/plant-V2) and declining by 10.6 and 19.1% compared to those in the first season for V1 and V2, respectively. This can be explained that amounts of nutrients from the media in the first season had supported the growth and development of tomato, resulting deficiency of nutrients in the media for the second season.  相似文献   

Different central manifestations in response to electroacupuncture at analgesic and nonanalgesic acupoints in rats: a manganese-enhanced functional magnetic resonance imaging study   总被引：6，自引：0，他引：6       下载免费PDF全文

Jen-Hwey Chiu  Mao-Shu Chung  Hui-Cheng Cheng  Tzu-Cheng Yeh  Jen-Chuen Hsieh  Chung-Yen Chang  Wan-Yo Kuo  Henrich Cheng    Low-Tone Ho 《Canadian journal of veterinary research》2003,67(2):94-101

Acupuncture analgesia is an important issue in veterinary medicine. This study was designed to elucidate central modulation effects in response to electroacupuncture (EA) at different acupoints. Manganese-enhanced functional magnetic resonance imaging was performed in Sprague-Dawley rats after sham acupuncture, sham EA, or true EA at somatic acupoints. The acupoints were divided into 3 groups: group 1, analgesic acupoints commonly used for pain relief, such as Hegu (LI 4); group 2, nonanalgesic acupoints rarely used for analgesic effect, such as Neiguan (PC 6); and group 3, acupoints occasionally used for analgesia, such as Zusanli (ST 36). Image acquisition was performed on a 1.5-T superconductive clinical scanner with a circular polarized extremity coil. The results showed that there was no neural activation caused by EA at a true acupoint with shallow needling and no electric current (sham acupuncture). When EA at a true acupoint was applied with true needling but no electric current (sham EA), there was only a slight increase in brain activity at the hypothalamus; when EA was applied at a true acupoint with true needling and an electric current (true EA), the primary response at the hypothalamus was enhanced. Also, there was a tendency for the early activation of pain-modulation areas to be prominent after EA at analgesic acupoints as compared with nonanalgesic acupoints. In conclusion, understanding the linkage between peripheral acupoint stimulation and central neural pathways provides not only an evidence-based approach for veterinary acupuncture but also a useful guide for clinical applications of acupuncture.  相似文献   

Taeanamides A and B,Nonribosomal Lipo-Decapeptides Isolated from an Intertidal-Mudflat-Derived Streptomyces sp.     

Jinsheng Cui  Eunji Kim  Dong Hyun Moon  Tae Ho Kim  Ilnam Kang  Yeonjung Lim  Daniel Shin  Sunghoon Hwang  Young Eun Du  Myoung Chong Song  Munhyung Bae  Jang-Cheon Cho  Jichan Jang  Sang Kook Lee  Yeo Joon Yoon  Dong-Chan Oh 《Marine drugs》2022,20(6)

Two new lipo-decapeptides, namely taeanamides A and B (1 and 2), were discovered from the Gram-positive bacterium Streptomyces sp. AMD43, which was isolated from a mudflat sample from Anmyeondo, Korea. The exact molecular masses of 1 and 2 were revealed by high-resolution mass spectrometry, and the planar structures of 1 and 2 were elucidated using NMR spectroscopy. The absolute configurations of 1 and 2 were determined using a combined analysis of ¹H-¹H coupling constants and ROESY correlations, the advanced Marfey’s method, and bioinformatics. The putative nonribosomal peptide synthetase pathway for the taeanamides was identified by analyzing the full genome sequence data of Streptomyces sp. AMD43. We also found that taeanamide A exhibited mild anti-tuberculosis bioactivity, whereas taeanamide B showed significant bioactivity against several cancer cell lines.  相似文献   

Phylogeography and conservation gaps of Musa balbisiana Colla genetic diversity revealed by microsatellite markers     

Mertens  Arne  Bawin  Yves  Vanden Abeele  Samuel  Kallow  Simon  Swennen  Rony  Vu  Dang Toan  Vu  Tuong Dang  Minh  Ho Thi  Panis  Bart  Vandelook  Filip  Janssens  Steven B. 《Genetic Resources and Crop Evolution》2022,69(7):2515-2534

Genetic Resources and Crop Evolution - Collection and storage of crop wild relative (CWR) germplasm is crucial for preserving species genetic diversity and crop improvement. Nevertheless, much of...  相似文献