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https://www.readbyqxmd.com/read/28927263/molecular-and-cellular-basis-of-neurodegeneration-in-alzheimer-s-disease
#1
Sangyun Jeong
The most common form of senile dementia is Alzheimer's disease (AD), which is characterized by the extracellular deposition of amyloid beta-peptide (Abeta) plaques and the intracellular formation of neurofibrillary tangles (NFTs) in the cerebral cortex. Tau abnormalities are commonly observed in many neurodegenerative diseases including AD, Parkinson's disease, and Pick's disease. Interestingly, tau-mediated formation of NFTs in AD brains shows better correlation with cognitive impairment than Abeta plaque accumulation; pathological tau alone is sufficient to elicit frontotemporal dementia, but it does not cause AD...
September 20, 2017: Molecules and Cells
https://www.readbyqxmd.com/read/28927261/hdac11-inhibits-myoblast-differentiation-through-repression-of-myod-dependent-transcription
#2
Sang Kyung Byun, Tae Hyeon An, Min Jeong Son, Da Som Lee, Hyun Sup Kang, Eun-Woo Lee, Baek Soo Han, Won Kon Kim, Kwang-Hee Bae, Kyoung-Jin Oh, Sang Chul Lee
Abnormal differentiation of muscle is closely associated with aging (sarcopenia) and diseases such as cancer and type II diabetes. Thus, understanding the mechanisms that regulate muscle differentiation will be useful in the treatment and prevention of these conditions. Protein lysine acetylation and methylation are major post-translational modification mechanisms that regulate key cellular processes. In this study, to elucidate the relationship between myogenic differentiation and protein lysine acetylation/methylation, we performed a PCR array of enzymes related to protein lysine acetylation/ methylation during C2C12 myoblast differentiation...
September 20, 2017: Molecules and Cells
https://www.readbyqxmd.com/read/28927255/innate-immune-response-of-bovine-mammary-epithelial-cells-to-mycoplasma-bovis
#3
Satoshi Gondaira, Hidetoshi Higuchi, Hidetomo Iwano, Koji Nishi, Takanori Nebu, Keiichi Nakajima, Hajime Nagahata
Mycoplasma species are contagious bacteria and Mycoplasma bovis mastitis is a serious productivity problem on dairy farms. Bovine mammary epithelial cells (bMEC) play an important role in the elimination of pathogens, but the effect of M. bovis on bMEC has not been fully clarified. To better understand the immune response against intramammary infection by M. bovis, we used microarray analysis to examine and profile mRNA expression in bMEC after stimulation with M. bovis. We also compared the effects of M. bovis, Staphylococcus aureus and Escherichia coli on immune-related mRNA expression in bMEC...
September 20, 2017: Journal of Veterinary Science
https://www.readbyqxmd.com/read/28927254/integrated-analysis-of-microrna-and-mrna-expression-in-peripheral-blood-leukocytes-of-warmblood-horses-before-and-after-exercise
#4
Hang-Ah Kim, Myung-Chul Kim, Na-Yon Kim, Doug-Young Ryu, Hong-Seok Lee, Yongbaek Kim
Exercise capacity is a valuable trait in horses, and it has been used as one of their selection criteria. Although exercise affects molecular homeostasis and adaptation in horses, the mechanisms underlying these effects are not fully understood. This study was carried out to identify changes in the blood profiles of microRNAs (miRNAs) and mRNAs induced by exercise in horse leukocytes. Total RNAs isolated from the peripheral blood leukocytes of four Warmblood horses before and after exercise were subjected to next-generation sequencing (NGS) and microarray analyses to determine the miRNA and mRNA expression profiles, respectively...
September 20, 2017: Journal of Veterinary Science
https://www.readbyqxmd.com/read/28927250/gut-microbiota-and-the-liver
#5
Alessandro Federico, Marcello Dallio, Giuseppe G Caprio, Vittorio M Ormando, Carmela Loguercio
Nowadays liver diseases represent one of major healthy problems in the world in terms of morbidity and mortality. The high prevalence of liver pathologies represents the key point to understand the necessity to identify the pathogenetic mechanisms that support these disorders in order to nurse them. Alterations of intestinal microbiota seem to play an important role in induction and promotion of liver damage progression, in addition to direct injury resulting from different causal agents. Gut microbiota is considered both as a promoting factor and as a potential therapeutic target of a large number of liver pathologies due to the connection between intestine and liver: the gut-liver axis...
December 2017: Minerva Gastroenterologica e Dietologica
https://www.readbyqxmd.com/read/28927233/fibroblast-growth-factor-2-mediated-fgfr-erk-signaling-supports-maintenance-of-cancer-stem-like-cells-in-esophageal-squamous-cell-carcinoma
#6
Osamu Maehara, Goki Suda, Mitsuteru Natsuizaka, Shunsuke Ohnishi, Yoshito Komatsu, Fumiyuki Sato, Masato Nakai, Takuya Sho, Kenichi Morikawa, Koji Ogawa, Tomoe Shimazaki, Megumi Kimura, Ayaka Asano, Yoshiyuki Fujimoto, Shinya Ohashi, Shingo Kagawa, Hideaki Kinugasa, Seiji Naganuma, Kelly A Whelan, Hiroshi Nakagawa, Koji Nakagawa, Hiroshi Takeda, Naoya Sakamoto
In esophageal squamous cell carcinoma (ESCC), a subset of cells defined by high expression of CD44 and low expression of CD24 has been reported to possess characteristics of cancer stem-like cells (CSCs). Novel therapies directly targeting CSCs have the potential to improve prognosis of ESCC patients. Although fibroblast growth factor-2 (FGF-2) expression correlates with recurrence and poor survival in ESCC patients, the role of FGF-2 in regulation of ESCC CSCs has yet to be elucidated. We report that FGF-2 is significantly upregulated in CSCs and significantly increases CSC content in ESCC cell lines by inducing epithelial-mesenchymal transition (EMT)...
September 13, 2017: Carcinogenesis
https://www.readbyqxmd.com/read/28927195/protein-sgpr-of-pseudomonas-putida-strain-ak5-is-a-lysr-type-regulator-of-salicylate-degradation-through-gentisate
#7
Irina Yu Filatova, Alexei S Kazakov, Evgeny N Muzafarov, Marina V Zakharova
Pseudomonas putida strain AK5 was the first characterized natural strain containing the 'classical' nah1 operon and nahR gene along with genes whose products are responsible for the less explored pathway of salicylate degradation through gentisate (the sgp operon). The sgp operon was found to be preceded by the divergently directed sgpR gene. The amino acid sequence of the sgpR product qualifies it as a LysR-type transcriptional regulator (LTTR) and suggests its potential function as an sgp operon transcriptional regulator...
July 3, 2017: FEMS Microbiology Letters
https://www.readbyqxmd.com/read/28927158/regulation-of-htra2-on-wt1-gene-expression-under-imatinib-stimulation-and-its-effects-on-the-cell-biology-of-k562-cells
#8
Lixia Zhang, Yan Li, Xiaoyan Li, Qing Zhang, Shaowei Qiu, Qi Zhang, Min Wang, Haiyan Xing, Qing Rao, Zheng Tian, Kejing Tang, Jianxiang Wang, Yingchang Mi
The aim of the present study was to investigate the regulation of Wilms Tumor 1 (WT1) by serine protease high-temperature requirement protein A2 (HtrA2), a member of the Htr family, in K562 cells. In addition, the study aimed to observe the effect of this regulation on cell biological functions and its associated mechanisms. Expression of WT1 and HtrA2 mRNA, and proteins following imatinib and the HtrA2 inhibitor 5-[5-(2-nitrophenyl) furfuryl iodine]-1, 3-diphenyl-2-thiobarbituric acid (UCF-101) treatment was detected with reverse transcription-quantitative polymerase chain reaction and western blot analysis...
September 2017: Oncology Letters
https://www.readbyqxmd.com/read/28927156/activation-of-%C3%AE-adrenergic-receptor-promotes-cellular-proliferation-in-human-glioblastoma
#9
Jing-Jing He, Wen-Hua Zhang, Shi-Ling Liu, Yi-Fang Chen, Chen-Xi Liao, Qian-Qing Shen, Ping Hu
Glioblastoma multiforme is the most common and aggressive form of primary malignant brain tumor. Previous evidence demonstrates that β-adrenergic receptors (β-ARs) are closely associated with the occurrence and development of brain tumors. However, the functional role of β-ARs in human glioblastoma and the underlying mechanisms are not fully understood. In the present study, by using the MTT assay, western blotting, and the reverse transcription polymerase chain reaction, it was revealed that isoproterenol (ISO), an agonist of β-ARs, promoted the proliferation of U251 cells but not U87-MG cells, and that this effect was blocked by the β-ARs antagonist propranolol...
September 2017: Oncology Letters
https://www.readbyqxmd.com/read/28927155/ras-protein-activator-like-1-is-functionally-involved-in-hypoxia-resistance-in-breast-cancer-cells-by-targeting-hypoxia-inducible-factor-1%C3%AE
#10
Ziming Huang, Rong Wang, Gang Wei, Ran Jiang, Yuan Zheng, Yiwen Tian, Bo Chen, Chunmei Ye, Mingxing Xue, Chunjiao Yu
RAS protein activator-like 1 (RASAL1) is a member of the RAS GTPase-activating protein family, and previous studies indicate that RASAL1 is involved in the progression of hypoxia resistance in breast cancer cells. In the present study, increased levels of hypoxia inducible factor-1α (HIF-1α) were observed to be accompanied with increased expression of RASAL1 in the breast cancer cell lines MCF-7 and MDA-MB-231 cells under hypoxia. Based on this, it was postulated that RASAL1 may serve a functional role in the development of hypoxia resistant in breast cancer cells...
September 2017: Oncology Letters
https://www.readbyqxmd.com/read/28927154/resistance-to-the-mtor-inhibitor-everolimus-is-reversed-by-the-downregulation-of-survivin-in-breast-cancer-cells
#11
Ludovica Taglieri, Francesca De Iuliis, Anna Giuffrida, Sabrina Giantulli, Ida Silvestri, Susanna Scarpa
Everolimus (RAD001) is an inhibitor of mammalian target of rapamycin used in combination with exemestane to treat hormone receptor-positive advanced breast cancer. However, not all patients are equally sensitive to RAD001 and certain patients develop resistance. Therefore, the present study analyzed the mechanisms involved in the resistance of breast cancer cells to RAD001 in order to identify a potential tool to overcome it. The effects of RAD001 on the inhibition of cell viability, on the induction of apoptosis and autophagy and on the regulation of survivin, an anti-apoptotic protein, were evaluated in two breast cancer cell lines: BT474 (luminal B) and MCF7 (luminal A)...
September 2017: Oncology Letters
https://www.readbyqxmd.com/read/28927151/microrna-320-suppresses-cervical-cancer-cell-viability-migration-and-invasion-via-directly-targeting-foxm1
#12
Can Shi, Zhenyu Zhang
Cervical cancer is one of the most common types of gynecological cancer worldwide. MicroRNA-320 (miR-320) has been reported to be downregulated in a number of types of human cancer. However, the expression level and functions of miR-320 in cervical cancer remain unknown. In the present study, miR-320 was identified to be markedly downregulated in cervical cancer tissues and cell lines. For the functional studies, miR-320 mimic or miR-320 inhibitor was introduced into cervical cancer cell lines. The effects of miR-320 on cervical cancer cell viability, migration and invasion were evaluated using MTT, migration and invasion assays, respectively...
September 2017: Oncology Letters
https://www.readbyqxmd.com/read/28927142/tumour-growth-suppressive-effect-of-arsenic-trioxide-in-squamous-cell-lung-carcinoma
#13
Leanne Lee Leung, Sze-Kwan Lam, Yuan-Yuan Li, James Chung-Man Ho
Lung squamous cell carcinoma (SCC) is the second most common subtype of non-small cell lung carcinoma. The anticancer effects of arsenic trioxide (ATO) in lung adenocarcinoma and small-cell lung cancer have previously been reported; however its effects in SCC remain unclear. An MTT assay and western blot analysis were performed to determine cell viability and protein expression, respectively, in the SK-MES-1 and SW900 SCC cell lines following treatment with ATO. Phosphatidylserine externalization, mitochondrial membrane depolarization and cell cycle distribution were studied using flow cytometry and the in vivo effects of ATO on tumour growth were investigated with a xenograft model...
September 2017: Oncology Letters
https://www.readbyqxmd.com/read/28927141/catalpol-promotes-cellular-apoptosis-in-human-hct116-colorectal-cancer-cells-via-microrna-200-and-the-downregulation-of-pi3k-akt-signaling-pathway
#14
Lan Liu, Hongwei Gao, Hongbo Wang, Yuan Zhang, Weihua Xu, Sen Lin, Hongjuan Wang, Qiong Wu, Jianqiang Guo
Catalpol is an effective active ingredient that functions as a diuretic and laxative, and exhibits blood sugar-lowering, liver protective, anti-aging and anticancer effects. In traditional Chinese medicine, catalpol is believed to be Yin nourishing. The anticancer effect of catalpol on human HCT116 colorectal cancer cells were investigated and the mechanism of action was evaluated. Cellular viability was detected using an MTT assay. Caspase-3 and caspase-9 activity, cellular apoptosis and nucleic morphology were analyzed using caspase-3 and caspase-9 activity assay kits, flow cytometric assays and DAPI staining assay, respectively...
September 2017: Oncology Letters
https://www.readbyqxmd.com/read/28927130/stereomicroscopic-features-of-colitis-associated-tumors-in-mice-evaluation-of-pit-pattern
#15
Ryosuke Yamauchi, Ken Kominato, Keiichi Mitsuyama, Hidetoshi Takedatsu, Shinichiro Yoshioka, Kotaro Kuwaki, Hiroshi Yamasaki, Shuhei Fukunaga, Atsushi Mori, Jun Akiba, Osamu Tsuruta, Takuji Torimura
Patients with longstanding ulcerative colitis have an increased risk of colorectal cancer. Mouse models for colitis-associated tumors are indispensable for the development of novel strategies for prevention and intervention, as well as an improved understanding of the mechanisms underlying tumor formation. The present study examined whether stereomicroscopic observations with dye-application were able to detect and discriminate tumors in a colitis-associated tumor model in mice. Colonic tumors were induced in C57BL/6 mice by 15 cycles of treatment with dextran sulfate sodium (DSS) in drinking water...
September 2017: Oncology Letters
https://www.readbyqxmd.com/read/28927118/mutations-in-braf-codons-594-and-596-predict-good-prognosis-in-melanoma
#16
Xiaowen Wu, Junya Yan, Jie Dai, Meng Ma, Huan Tang, Jiayi Yu, Tianxiao Xu, Huan Yu, Lu Si, Zhihong Chi, Xinan Sheng, Chuanliang Cui, Yan Kong, Jun Guo
B-Raf proto-oncogene serine/threonine kinase (BRAF) V600E is the most common kinase-activating mutation and is associated with poor prognosis in melanoma. However, the clinical significance of kinase-impairing mutations remains unclear. The present study aimed to analyze kinase-impairing mutations in BRAF codons 594 and 596 in non-Caucasian patients with melanoma and to investigate their possible clinical significance. To detect hotspot mutations, exon 15 of the BRAF gene was amplified using polymerase chain reaction in samples from 1,554 patients with melanoma...
September 2017: Oncology Letters
https://www.readbyqxmd.com/read/28927117/salvia-miltiorrhiza-extract-inhibits-tpa-induced-mmp-9-expression-and-invasion-through-the-mapk-ap-1-signaling-pathway-in-human-breast-cancer-mcf-7-cells
#17
Jeong-Mi Kim, Eun-Mi Noh, Hyun-Kyung Song, Minok Lee, Soo Ho Lee, Sueng Hyuk Park, Chan-Keun Ahn, Guem-San Lee, Eui-Baek Byun, Beom-Su Jang, Kang-Beom Kwon, Young-Rae Lee
Cancer cell invasion is crucial for metastasis. A major factor in the capacity of cancer cell invasion is the activation of matrix metalloproteinase-9 (MMP-9), which degrades the extracellular matrix. Salvia miltiorrhiza has been used as a promotion for blood circulation to remove blood stasis. Numerous previous studies have demonstrated that S. miltiorrhiza extracts (SME) decrease lipid levels and inhibit inflammation. However, the mechanism behind the effect of SME on breast cancer invasion has not been identified...
September 2017: Oncology Letters
https://www.readbyqxmd.com/read/28927115/wee1-inhibition-by-mk1775-as-a-single-agent-therapy-inhibits-ovarian-cancer-viability
#18
Minghui Zhang, Donye Dominguez, Siqi Chen, Jie Fan, Lei Qin, Alan Long, Xia Li, Yi Zhang, Huirong Shi, Bin Zhang
Wee1-like protein kinase (WEE1) physiologically serves a key function in maintaining the integrity of the cell genome through mediating the activation of cyclin-dependent kinase (CDK)1 and CDK2. Increased expression of WEE1 has been associated with the poor prognosis of patients with ovarian cancer. The present study aimed at examining the in vitro and in vivo antitumor activity of MK1775, a potent pharmacological inhibitor of WEE1, as a single agent against ovarian cancer cells. The cytotoxicity of MK1775 was examined in a panel of tumor cells using MTT in vitro...
September 2017: Oncology Letters
https://www.readbyqxmd.com/read/28927113/inhibition-of-autophagy-potentiates-the-proliferation-inhibition-activity-of-microrna-7-in-human-hepatocellular-carcinoma-cells
#19
Yanna Wang, Qiaoling Wang, Jiqing Song
MicroRNAs (miRNAs/miRs) are important molecules that are able to regulate multiple cellular processes in cancer cells. miR-7 has been previously identified as a tumor suppressive miRNA in several types of cancer. The aim of the present study was to investigate whether miR-7 is able to regulate autophagy in hepatocellular carcinoma (HCC) cells. It was identified that miR-7 was significantly downregulated in tumor tissues compared with adjacent normal tissues. Overexpression of miR-7 inhibited cell proliferative activity, which was partially reversed by miR-7 inhibitor...
September 2017: Oncology Letters
https://www.readbyqxmd.com/read/28927105/reactive-oxygen-species-driven-mitochondrial-injury-induces-apoptosis-by-teroxirone-in-human-non-small-cell-lung-cancer-cells
#20
Jing-Ping Wang, Chang-Heng Hsieh, Chun-Yen Liu, Kai-Han Lin, Pei-Tsun Wu, Kwun-Min Chen, Kang Fang
Teroxirone as an anticancer agent is used to treat human lung cancer by inducing apoptotic cell death. Previous studies have demonstrated that the status of the tumor suppressor p53 determined the onset of apoptotic cell death in human non-small cell lung cancer cells (NSCLC). In order to further understand the underlying mechanisms of lung cancer, the present study explored the targets of teroxirone. By including antioxidants, the present study analyzed changes in cell proliferation, cell cycle division, mitochondrial membrane potential (MMP), reactive oxygen species (ROS), expression of apoptosis markers and cytochrome c distribution...
September 2017: Oncology Letters
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