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https://www.readbyqxmd.com/read/28699905/fkbp51-decreases-cell-proliferation-and-increases-progestin-sensitivity-of-human-endometrial-adenocarcinomas-by-inhibiting-akt
#1
Jing Dong, Yulian Jiao, Wenli Mu, Bingru Lu, Muyun Wei, Linying Sun, Shengnan Hu, Bin Cui, Xiaowen Liu, Zijiang Chen, Yueran Zhao
In this study, we investigated the role of FK506 binding protein 51 (FKBP51) in human endometrial adenocarcinoma progression. Immunohistochemical analysis showed decreased FKBP51 expression in endometrial adenocarcinoma tissues. Moreover, higher FKBP51 expression was observed in the normal secretory phase than in proliferative-phase endometrial tissues. FKBP51-shRNA transfected KLE cells showed high Ser473-phospho Akt with decreased p21 and p27 levels, which promoted S-G2/M phase cell cycle progression and proliferation...
June 30, 2017: Oncotarget
https://www.readbyqxmd.com/read/28685413/telluric-acid-ameliorates-endotoxemic-kidney-injury-in-mice-involvement-of-tlr4-nrf2-and-pi3k-akt-signaling-pathways
#2
Ahmed F Mohamed, Marwa M Safar, Hala F Zaki, Helmy M Sayed
Being one of the most abundant trace elements in the human body, the therapeutic potential of tellurium-based compounds has been a target of interest. Recent reports denoted their redox-modulating and anti-inflammatory activities in experimental endotoxemia. However, their potential nephroprotective effect against endotoxemic kidney injury is yet to be elucidated. This study investigated the possible renoprotective effect of telluric acid (TEL) against lipopolysaccharide (LPS)-induced acute kidney injury (AKI) in mice, targeting toll-like receptor 4 (TLR4), phosphoinositide 3-kinase (PI3K)/Akt, and nuclear factor-erythroid 2-related factor-2 (Nrf2) pathways as possible mechanistic contributors to TEL's effect...
July 6, 2017: Inflammation
https://www.readbyqxmd.com/read/28679060/protective-effects-of-green-tea-polyphenol-epigallocatechin-3-gallate-against-sevoflurane-induced-neuronal-apoptosis-involves-regulation-of-creb-bdnf-trk-b-and-pi3k-akt-mtor-signalling-pathways-in-neonatal-mice
#3
Mei-Li Ding, Hui Ma, Yi-Gang Man, Yan-Hong Lv
Epigallocatechin-3-gallate (EGCG), a polyphenol in green tea is an effective antioxidant and possesses neuroprotective effects. For neurogenesis and synaptic plasticity, brain-derived neurotrophic factor (BDNF) and cyclic AMP response element-binding protein (CREB) are crucially involved. In this study we aimed to assess protective effects of EGCG against sevoflurane-induced neurotoxicity in neonatal mice. Distinct groups of C57BL/6 mice were given EGCG (25, 50 or 75 mg/kg b.wt) from postnatal day 3 (P3) to P21 and were subjected to sevoflurane (3 %; 6 h) exposure on P7...
July 5, 2017: Canadian Journal of Physiology and Pharmacology
https://www.readbyqxmd.com/read/28676338/dyrk2-involved-in-regulating-lps-induced-neuronal-apoptosis
#4
Yuxiang Sun, Xin Ge, Mengmeng Li, Li Xu, Yaodong Shen
The activation of relevant signaling pathways plays a very important role in LPS-induced neuronal damage. Dual-specificity tyrosine-phosphorylation-regulated kinase 2(Dyrk2), as a phosphokinase that can directly or indirectly phosphorylate signal molecules, was recently reported to down-regulate Type I Interferon(TIF) by promoting ser527 phosphorylation of TBK1. To further investigate the role of Dyrk2 in neuroinflammation, we for the first time focused on its function in LPS-induced neuronal damage. We found LPS stimulation increased the expression of Dyrk2 in the nucleus and cytoplasm of neurons...
July 1, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28658664/differential-gene-and-lncrna-expression-in-the-lower-thoracic-spinal-cord-following-ischemia-reperfusion-induced-acute-kidney-injury-in-rats
#5
Qing-Quan Liu, Hui Liu, Zhi-Gang He, Shi-Jie Zhang, Bao-Wen Liu, Le Wang, Wen-Hui Qiu, Qing Xu, Hong-Bing Xiang, Yong-Man Lv
We used high-throughput RNA sequencing to analyze differential gene and lncRNA expression patterns in the lower thoracic spinal cord during ischemia/reperfusion (I/R)-induced acute kidney injury (AKI) in rats. We observed that of 32662 mRNAs, 4296 out were differentially expressed in the T8-12 segments of the spinal cord upon I/R-induced AKI. Among these, 62 were upregulated and 34 were downregulated in response to I/R (FDR < 0.05, |log2FC| > 1). Further, 52 differentially expressed lncRNAs (35 upregulated and 17 downregulated) were identified among 3849 lncRNA transcripts...
June 20, 2017: Oncotarget
https://www.readbyqxmd.com/read/28631564/indole-3-carbinol-induces-apoptosis-of-chronic-myelogenous-leukemia-cells-through-suppression-of-stat5-and-akt-signaling-pathways
#6
Majid Safa, Leila Jafari, Fatemeh Alikarami, Rima Manafi Shabestari, Ahmad Kazemi
Signal transducer and activator of transcription 5 and Akt pathways, implicated in signaling transduction downstream of BCR-ABL, play critical roles in the pathogenesis of chronic myeloid leukemia. Therefore, idenication of novel compounds that modulate the activity of such pathways could be a new approach in the treatment of chronic myeloid leukemia. Previous studies have demonstrated that indole-3-carbinol inhibits the proliferation and induces apoptosis of various tumor cells. However, its anticancer activity against chronic myeloid leukemia cells and the underlying mechanism remain unclear...
June 2017: Tumour Biology: the Journal of the International Society for Oncodevelopmental Biology and Medicine
https://www.readbyqxmd.com/read/28627671/downregulation-of-notch1-inhibits-the-invasion-and-metastasis-of-human-gastric-cancer-cells-sgc7901-and-mkn74-in%C3%A2-vitro-through-pten-activation-and-dephosphorylation-of-akt-and-fak
#7
Xue-Song Zhang, Yan-Hua Hu, Hong-Yu Gao, Xiu-Wen Lan, Ying-Wei Xue
Migration and invasion are both vital causes of mortality in patients with gastric cancer. Therefore, the inhibition of these tumour cell processes is of great importance in gastric cancer therapy. Activation of Notch has been reported in many cancers. The critical role of Notch and its regulation in tumourigenesis has been noted. Although the studies on Notch in the field of cancer have been performed extensively, the role of Notch1 signalling in gastric cancer requires further study. Inactivation of PTEN has been observed in the development of many malignant tumors, and loss of PTEN function has been implicated in tumorigenic processes...
August 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28620824/l-3-n-butylphthalide-activates-akt-mtor-signaling-inhibits-neuronal-apoptosis-and-autophagy-and-improves-cognitive-impairment-in-mice-with-repeated-cerebral-ischemia-reperfusion-injury
#8
Jing Xu, Yaping Huai, Nan Meng, Yanhong Dong, Zhijuan Liu, Qianqian Qi, Ming Hu, Mingyue Fan, Wei Jin, Peiyuan Lv
L-3-n-Butylphthalide (L-NBP) exerts neuroprotective effects in animal models of cerebral ischemia, but its potential benefits in repeated cerebral ischemia-reperfusion (RCIR) injury remain unknown. We investigated the effect of L-NBP on cognitive impairment induced by RCIR in mice. Male C57Bl/6 mice received sham surgery or bilateral common carotid artery occlusion (3 times, 20 min each) and were orally administered preoperative L-NBP (30 mg/kg/day, 7 days), postoperative L-NBP (30 or 60 mg/kg/day, 28 days) or postoperative vehicle (28 days)...
June 15, 2017: Neurochemical Research
https://www.readbyqxmd.com/read/28616662/perifosine-enhances-bevacizumab-induced-apoptosis-and-therapeutic-efficacy-by-targeting-pi3k-akt-pathway-in-a-glioblastoma-heterotopic-model
#9
Sara Ramezani, Nasim Vousooghi, Fatemeh Ramezani Kapourchali, Mohammad Taghi Joghataei
Bevacizumab (BVZ) as an antiangiogenesis therapy leads to a transient therapeutic efficacy in high-grade glioma. However, the proapoptotic potential of BVZ has not been well elucidated, yet. There is also a tumor resistance to BVZ that is linked to post-treatment metalloproteinases and AKT activities. Herein, the association between therapeutic efficacy and putative proapoptotic activity of low-dose BVZ either alone or in combination with a specific inhibitor of AKT called perifosine (PRF), in a glioma model was investigated...
June 14, 2017: Apoptosis: An International Journal on Programmed Cell Death
https://www.readbyqxmd.com/read/28603063/overexpression-of-phosphoprotein-phosphatase-2a-predicts-worse-prognosis-in-patients-with-breast-cancer-a-15-year-follow-up
#10
Po-Ming Chen, Pei-Yi Chu, Shiao-Lin Tung, Chun-Yu Liu, Yi-Fang Tsai, Yen-Shu Lin, Wan-Lun Wang, Yu-Ling Wang, Pei-Ju Lien, Ta-Chung Chao, Ling-Ming Tseng
Breast cancer subtypes can be stratified by immunohistochemical (IHC) expression of estrogen receptor (ER), progesterone receptor (PR), and human epidermal growth factor 2 (HER2). The signaling pathways mediated by these receptors are the dominant drivers of cell proliferation and survival in the majority of human breast cancers. One of the most frequently overactivated pathways in breast cancer is the AKT signaling cascade. Protein phosphatase 2A (PP2A) acts as a switch to turn off signal transduction in the AKT pathway; however, it is frequently inactivated in many cancers by phosphorylation of Tyr-307 to form phosphoprotein phosphatase 2A (p-PP2A)...
June 8, 2017: Human Pathology
https://www.readbyqxmd.com/read/28562590/genetic-wiring-maps-of-single-cell-protein-states-reveal-an-off-switch-for-gpcr-signalling
#11
Markus Brockmann, Vincent A Blomen, Joppe Nieuwenhuis, Elmer Stickel, Matthijs Raaben, Onno B Bleijerveld, A F Maarten Altelaar, Lucas T Jae, Thijn R Brummelkamp
As key executers of biological functions, the activity and abundance of proteins are subjected to extensive regulation. Deciphering the genetic architecture underlying this regulation is critical for understanding cellular signalling events and responses to environmental cues. Using random mutagenesis in haploid human cells, we apply a sensitive approach to directly couple genomic mutations to protein measurements in individual cells. Here we use this to examine a suite of cellular processes, such as transcriptional induction, regulation of protein abundance and splicing, signalling cascades (mitogen-activated protein kinase (MAPK), G-protein-coupled receptor (GPCR), protein kinase B (AKT), interferon, and Wingless and Int-related protein (WNT) pathways) and epigenetic modifications (histone crotonylation and methylation)...
June 8, 2017: Nature
https://www.readbyqxmd.com/read/28551702/alpha-7-nicotinic-receptor-signaling-pathway-participates-in-the-neurogenesis-induced-by-chat-positive-neurons-in-the-subventricular-zone
#12
Jianping Wang, Zhengfang Lu, Xiaojie Fu, Di Zhang, Lie Yu, Nan Li, Yufeng Gao, Xianliang Liu, Chunmao Yin, Junji Ke, Liyuan Li, Mengmeng Zhai, Shiwen Wu, Jiahong Fan, Liang Lv, Junchao Liu, Xuemei Chen, Qingwu Yang, Jian Wang
Choline acetyltransferase-positive (ChAT(+)) neurons within the subventricular zone (SVZ) have been shown to promote neurogenesis after stroke in mice by secreting acetylcholine (ACh); however, the mechanisms remain unclear. Receptors known to bind ACh include the nicotinic ACh receptors (nAChRs), which are present in the SVZ and have been shown to be important for cell proliferation, differentiation, and survival. In this study, we investigated the neurogenic role of the alpha-7 nAChR (α7 nAChR) in a mouse model of middle cerebral artery occlusion (MCAO) by using α7 nAChR inhibitor methyllycaconitine...
May 27, 2017: Translational Stroke Research
https://www.readbyqxmd.com/read/28545028/stc1-promotes-cell-apoptosis-via-nf-%C3%AE%C2%BAb-phospho-p65-ser536-in-cervical-cancer-cells
#13
Xi Pan, Binyuan Jiang, Jianhao Liu, Juan Ding, Yuehui Li, Ruili Sun, Li Peng, Changfei Qin, Shujuan Fang, Guancheng Li
Stanniocalin-1 (STC1) is a secreted glycoprotein hormone and involved in various types of human malignancies. Our previous studies revealed that STC1 inhibited cell proliferation and invasion of cervical cancer cells through NF-κB P65 activation, but the mechanism is poorly understood. In our studies, we found overexpression of STC1 promoted cell apoptosis while silencing of STC1 promoted cell growth of cervical cancer. Phospho-protein profiling and Western blotting results showed the expression of NF-κB related phosphorylation sites including NF-κB P65 (Ser536), IκBα, IKKβ, PI3K, and AKT was altered in STC1-overexpressed cervical cancer cells...
July 11, 2017: Oncotarget
https://www.readbyqxmd.com/read/28535302/inhibition-of-n-acetylglucosaminyltransferase-v-enhances-the-cetuximab-induced-radiosensitivity-of-nasopharyngeal-carcinoma-cells-likely-through-egfr-n-glycan-alterations
#14
Xiaomin Huang, Ting Liu, Qiongyao Wang, Weiliang Zhu, Hui Meng, Linlang Guo, Ting Wei, Jian Zhang
N-acetylglucosaminyltransferase V (GnT-V), an enzyme that catalyses the formation of the N-linked β-1-6 branching of oligosaccharides, is related to the radiosensitivity of nasopharyngeal carcinoma (NPC). Cetuximab (C225) is an epidermal growth factor receptor (EGFR) inhibitor used as a radiosensitizer in the treatment of NPC. In this study, we used GnT-V as a molecular target to further sensitize cetuximab-treated NPC cells to radiation. The results from two NPC cell lines (CNE1 and CNE2) revealed that the silencing of GnT-V enhanced cetuximab-induced radiosensitivity by decreasing the β-1-6 branching of oligosaccharides on the EGFR...
May 23, 2017: Glycobiology
https://www.readbyqxmd.com/read/28493079/tlr2-regulates-allergic-airway-inflammation-and-autophagy-through-pi3k-akt-signaling-pathway
#15
Xuqin Jiang, Lei Fang, Huimei Wu, Xiaodong Mei, Fang He, Peishan Ding, Rongyu Liu
Toll-like receptors (TLRs) are innate pattern recognition receptors that play a critical role in allergic inflammation, yet their contribution to autophagy in asthma remains poorly defined. Here, we investigate the role of Toll-like receptor 2 (TLR2) in phosphoinositide 3-kinases/protein kinase B (PI3K/Akt) pathway-mediated autophagy in ovalbumin-induced airway inflammation in mice. Wild-type (WT) and TLR2-knockout (TLR2(-/-)) C57BL/6 mice were ovalbumin-sensitized and ovalbumin-challenged. In ovalbumin-challenged WT mice, enhanced expression of TLR2 in lung tissue, remarkable inflammatory cell infiltrates, goblet cell hyperplasia, and increased mucus production were observed...
August 2017: Inflammation
https://www.readbyqxmd.com/read/28483634/protein-mediated-regulation-of-the-nhe1-isoform-of-the-na-h-exchanger-in-renal-cells-a-regulatory-role-of-hsp90-and-akt-kinase
#16
Ayodeji Odunewu-Aderibigbe, Larry Fliegel
Na(+)/H(+) exchanger isoform one (NHE1) is a pH regulatory protein that is present in renal tissues and serves to remove protons from within cells and protect against intracellular acidification. NHE1 has a large 315 amino acid cytosolic regulatory domain that regulates the catalytic membrane domain. We examined protein-mediated regulation of NHE1 through the cytosolic domain. Affinity chromatography with the C-terminus of NHE1 yielded a number of NHE1 binding proteins including 14-3-3 protein, heat shock proteins (Hsp90 and Hsp70) and Na(+)/K(+) ATPase...
May 5, 2017: Cellular Signalling
https://www.readbyqxmd.com/read/28475617/regulation-of-the-pi3k-akt-pathway-during-decidualization-of-endometrial-stromal-cells
#17
François Fabi, Kathy Grenier, Sophie Parent, Pascal Adam, Laurence Tardif, Valérie Leblanc, Eric Asselin
Infertility is constantly increasing in Canada, where 16% of Canadian couples are experiencing difficulty conceiving. It is thought that infertility can emanate from the dysregulated communication between the embryo and the maternal endometrium. In order to allow for this window of implantation to be open at the right moment, endometrial stromal cells proliferate and differentiate by a mechanism called decidualization. Intracellular and molecular mechanisms involved in the regulation of apoptosis and cell proliferation during decidualization of the endometrium are yet to be fully understood...
2017: PloS One
https://www.readbyqxmd.com/read/28464236/neuroprotection-by-plumbagin-involves-bdnf-trkb-pi3k-akt-and-erk1-2-jnk-pathways-in-isoflurane-induced-neonatal-rats
#18
Jun-Hui Yuan, Feng Pan, Jie Chen, Cai-Er Chen, Deng-Pan Xie, Xing-Zhu Jiang, Su-Juan Guo, Jun Zhou
OBJECTIVES: This study was designed to assess the effects of plumbagin on isoflurane-induced neurotoxicity. METHODS: Neonatal Sprague Dawley rat pups were treated with plumbagin (50, 100 or 150 mg/kg body weight, orally) from postnatal day 2. The pups on postnatal day 7 were subjected to isoflurane (0.75%) exposure for 6 h. Neuronal apoptosis in the hippocampal tissues was detected by TUNEL assay and FluroJade B staining following isoflurane exposure. Protein expressions were analysed by immunoblotting...
May 2, 2017: Journal of Pharmacy and Pharmacology
https://www.readbyqxmd.com/read/28463955/capilliposide-c-sensitizes-esophageal-squamous-carcinoma-cells-to-oxaliplatin-by-inducing-apoptosis-through-the-pi3k-akt-mtor-pathway
#19
Zhipeng Shen, Lixia Xu, Juan Li, Ni Zhang
BACKGROUND Although platinum-based chemotherapy is the most effective strategy for esophageal cancer, toxicity and drug resistance limit the dose administration and the application of chemotherapy. Capilliposide C (CPS-C) is isolated from the Chinese herb Lysimachia capillipes Hemsl and is approved to be effective against carcinomas. However, the activity of CPS-C against esophageal cancer remains unclear. The present study was conducted to assess the chemosensitizing effects of CPS-C for enhancing the therapeutic efficacy of oxaliplatin in esophageal squamous carcinoma cells and explore the underlying mechanism...
May 2, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/28459364/cytotoxic-effect-of-celastrol-alone-or-in-combination-with-paclitaxel-on-anaplastic-thyroid-carcinoma-cells
#20
Si Hyoung Kim, Jun Goo Kang, Chul Sik Kim, Sung-Hee Ihm, Moon Gi Choi, Hyung Joon Yoo, Seong Jin Lee
The influence of celastrol alone or in combination with paclitaxel on survival of anaplastic thyroid carcinoma cells was investigated. In 8505C and SW1736 cells, after treatment of celastrol, cell viability decreased, and cytotoxic activity increased. The protein levels of heat shock protein (hsp) 90, hsp70, Bax, death receptor 5, cleaved caspase-3, cleaved poly (ADP-ribose) polymerase, phospho-extracellular signal-regulated kinase 1/2 (ERK1/2), and phospho-c-Jun N-terminal kinase (JNK) were elevated, and those of Bcl2, phospho-nuclear factor-kappaB (NF-κB), and total and phospho-Akt were reduced...
May 2017: Tumour Biology: the Journal of the International Society for Oncodevelopmental Biology and Medicine
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