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Ozone exposure induces neuroendocrine stress response, which causes lymphopenia. It was hypothesized that ozone-induced increases in stress hormones will temporally follow changes in circulating granulocytes, monocytes- and lymphocyte subpopulations. The goal of this study was to chronicle the changes in circulating stress hormones, cytokines, and leukocyte trafficking during 4 h exposure to ozone. Male Wistar Kyoto rats were exposed to air or ozone (0.4 or 0.8 ppm) for 0.5, 1, 2, or 4 h. After each time point, circulating stress hormones, cytokines, and lung gene expression were assessed along with live and apoptotic granulocytes, monocytes (classical and non-classical), and lymphocytes (B, Th, and Tc) in blood, thymus, and spleen using flow cytometry. Circulating stress hormones began to increase at 1 h of ozone exposure. Lung expression of inflammatory cytokines (Cxcl2, Il6, and Hmox1) and glucocorticoid-responsive genes (Nr3c1, Fkbp5 and Tsc22d3) increased in both a time- and ozone concentration-dependent manner. Circulating granulocytes increased at 0.5 h of ozone exposure but tended to decrease at 2 and 4 h, suggesting a rapid egress and then margination to the lung. Classical monocytes decreased over 4 h of exposure periods (∼80 % at 0.8 ppm). B and Tc lymphocytes significantly decreased after ozone exposure at 2 and 4 h. Despite dynamic shifts in circulating immune cell populations, few differences were measured in serum cytokines. Ozone neither increased apoptotic cells nor altered thymus and spleen lymphocytes. The data show that ozone-induced increases in adrenal-derived stress hormones precede the dynamic migration of circulating immune cells, likely to the lung to mediate inflammation.Age-related differences in proprioceptive asymmetries have received little attention. This study aimed to determine differences in asymmetry of the right/left upper limb proprioceptive systems between younger and older adults. Asymmetries were compared in two "eyes closed" experiments involving the same elbow joints. Position sense was tested in two matching conditions ipsilateral remembered and contralateral concurrent. Movement sense was tested while reproducing with the opposite forearm the illusory movement elicited by distal tendon vibration applied to the reference forearm. Older adults exhibited a larger error when matching with the non-dominant than dominant forearm in the ipsilateral remembered condition and a disparate asymmetry in the contralateral condition when compared to younger adults. In addition, in older adults, the velocity of reproduced illusory movements was slower, and asymmetry in movement perception was not significant. The difference in proprioceptive asymmetry between younger and older adults might be attributed to a significant reduction of the sensory system gain affecting, more particularly, the left non-dominant arm sensory system via several physiological and neurophysiological mechanisms.
The aim of this study was to explore the expression levels and biological significance of TDO2 in colorectal cancer (CRC).
First, we explored the potential oncogenic roles of TDO2 across 33 tumors based on data from The Cancer Genome Atlas (TCGA) and Gene Expression Omnibus (GEO). Second, we evaluated TDO2 protein expression in 55 CRC tissue samples and 30 cDNA samples by immunohistochemistry and qPCR. Third, we investigated the effect of TDO2 on CRC cells by cell proliferation, wound healing, invasion, and colony formation assays. Finally, we determined the protein that is most closely associated with TDO2 via bioinformatics analysis, enriched the key pathways, and verified them.
The expression level of TDO2 was found to be associated with the tumor clinical stage in CRC. A high expression of TDO2 was associated with a poor outcome in CRC patients. Inhibition of TDO2 expression by RNAi in LoVo and HCT116 cell lines significantly reduced the proliferation, migration, and invasion abilities as well as colony formation abilities of cells. Further, knockdown of TDO2 expression induced inactivation of the TDO2-KYNU-AhR signaling pathway.
The results suggest that TDO2 plays an important role in the progression of CRC. Accordingly, TDO2 is a potential therapeutic target in CRC.
The results suggest that TDO2 plays an important role in the progression of CRC. Accordingly, TDO2 is a potential therapeutic target in CRC.Given the complexity of nutrient stress responses and the availability of a few validated reference genes, we aimed to identify robust and stable reference genes for macronutrient stress in rice and soybean. Ten potential reference genes were evaluated using geNorm, NormFinder, BestKeeper, Comparative ΔCt method, and RefFinder algorithms under low and completely starved conditions of nitrogen (N), phosphorus (P), potassium (K), and sulphur (S). Results revealed distinct sets of reference gene pairs, showing stable expression under different experimental conditions. The gene pairs TIP41/UBC(9/10/18) and F-box/UBC10 were most stable in rice and soybean, respectively under N stress. Under P stress, UBC9/UBC10 in rice and F-Box/UBC10 in soybean were most stable. Similarly, TIP41/UBC10 in rice and RING FINGER/UBC9 in soybean were the best gene pairs under K stress while F-Box/TIP41 in rice and UBC9/UBC10 in soybean were the most stable gene pairs under S stress. These reference gene pairs were validated by quantifying the expression levels of high-affinity transporters like NRT2.1/NRT2.5, PT1, AKT1, and SULTR1 for N, P, K, and S stress, respectively. This study reiterates the importance of choosing reference genes based on crop species and the experimental conditions, in order to obtain concrete answers to missing links of gene regulation in response to macronutrient deficiencies.
Malaria is a global health problem with the greatest burden in sub-Saharan Africa (sSA). The resistance to available antimalarial agents necessitate for the development of new and safe drugs for which medicinal plants provides credible alternative sources for discovering new and cheap therapeutic agents. Calotropis procera is used in several folk or traditional medicines for the treatment of various diseases across different regions of the world. In Nigeria traditional medicine, C. Tromethamine procera latex is used either alone or in combination with other herbs to cure common diseases including malaria. In Malaka district (Indonesia), Calotropis gigantea (a member of Apocyanceae), is one of the most used herbs to treat malaria patient via the massage method.
This study aimed to evaluate the anti-plasmodial activity of phosphate buffer extract of Calotropis procera latex in mice infected with Plasmodium berghei.
The plant's anti-plasmodial agent was extracted using 0.2M-phosphate buffer (pH 7.0), followed by precipitation using acetone.
My Website: https://www.selleckchem.com/products/trometamol.html
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