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https://www.readbyqxmd.com/read/28712031/human-skeletal-muscle-type-1-fibre-distribution-and-response-of-stress-sensing-proteins-along-the-titin-molecule-after-submaximal-exhaustive-exercise
#1
Satu O A Koskinen, Heikki Kyröläinen, Riina Flink, Harri P Selänne, Sheila S Gagnon, Juha P Ahtiainen, Bradley C Nindl, Maarit Lehti
Early responses of stress-sensing proteins, muscle LIM protein (MLP), ankyrin repeat proteins (Ankrd1/CARP and Ankrd2/Arpp) and muscle-specific RING finger proteins (MuRF1 and MuRF2), along the titin molecule were investigated in the present experiment after submaximal exhaustive exercise. Ten healthy men performed continuous drop jumping unilaterally on a sledge apparatus with a submaximal height until complete exhaustion. Five stress-sensing proteins were analysed by mRNA measurements from biopsies obtained immediately and 3 h after the exercise from exercised vastus lateralis muscle while control biopsies were obtained from non-exercised legs before the exercise...
July 15, 2017: Histochemistry and Cell Biology
https://www.readbyqxmd.com/read/28704954/docosahexaenoic-acid-inhibits-cerulein-induced-acute-pancreatitis-in-rats
#2
Yoo Kyung Jeong, Sle Lee, Joo Weon Lim, Hyeyoung Kim
Oxidative stress is an important regulator in the pathogenesis of acute pancreatitis (AP). Reactive oxygen species induce activation of inflammatory cascades, inflammatory cell recruitment, and tissue damage. NF-κB regulates inflammatory cytokine gene expression, which induces an acute, edematous form of pancreatitis. Protein kinase C δ (PKCδ) activates NF-κB as shown in a mouse model of cerulein-induced AP. Docosahexaenoic acid (DHA), an ω-3 fatty acid, exerts anti-inflammatory and antioxidant effects in various cells and tissues...
July 12, 2017: Nutrients
https://www.readbyqxmd.com/read/28693237/inhibitory-effects-of-delphinidin-on-the-proliferation-of-ovarian-cancer-cells-via-pi3k-akt-and-erk-1-2-mapk-signal-transduction
#3
Whasun Lim, Gwonhwa Song
Delphinidin is a member of the anthocyanidin family and is a natural pigment in red cabbage, berries, sweet potatoes and grapes. It possesses nutraceutical properties against various chronic diseases and types of cancer. However, little is known about its preventative effects on epithelial ovarian cancer, a disease that is associated with a low survival rate, a poor prognosis and a high rate of recurrence. The results of the present study demonstrated that the proliferation of SKOV3 cells decreased in a dose-dependent manner in response to treatment with delphinidin, and the phosphorylation of carcinogenic protein kinases associated with the progression of epithelial ovarian cancer was affected by delphinidin treatment...
July 2017: Oncology Letters
https://www.readbyqxmd.com/read/28692767/reactive-oxygen-species-regulating-polymersome-as-an-antiviral-agent-against-influenza-virus
#4
Hyun-Ouk Kim, Minjoo Yeom, Jihye Kim, Aastha Kukreja, Woonsung Na, Jihye Choi, Aram Kang, Dayeon Yun, Jong-Woo Lim, Daesub Song, Seungjoo Haam
Reactive oxygen species (ROS) produced during mitochondrial oxidative phosphorylation play an important role as signal messengers in the immune system and also regulate signal transduction. ROS production, initiated as a consequence of microbial invasion, if generated at high levels, induces activation of the MEK (mitogen-activated protein kinase kinase)/ERK (extracellular signal-regulated kinase) pathway to promote cell survival and proliferation. However, viruses hijack the host cells' pathways, causing biphasic activation of the MEK/ERK cascade...
July 10, 2017: Small
https://www.readbyqxmd.com/read/28688971/tumor-vessel-normalization-by-the-pi3k-inhibitor-hs-173-enhances-drug-delivery
#5
Soo Jung Kim, Kyung Hee Jung, Mi Kwon Son, Jung Hee Park, Hong Hua Yan, Zhenghuan Fang, Yeo Wool Kang, Boreum Han, Joo Han Lim, Soon-Sun Hong
Tumor vessels are leaky and immature, which causes poor oxygen and nutrient supply to tumor vessels and results in cancer cell metastasis to distant organs. This instability of tumor blood vessels also makes it difficult for anticancer drugs to penetrate and reach tumors. Numerous tumor vessel normalization approaches have been investigated for improving drug delivery into tumors. In this study, we investigated whether phosphoinositide 3-kinase (PI3K) inhibitors are able to improve vascular structure and function over the prolonged period necessary to achieve effective vessel normalization...
July 6, 2017: Cancer Letters
https://www.readbyqxmd.com/read/28685689/arylurea-derivatives-a-class-of-potential-cancer-targeting-agents
#6
Jia-Nian Chen, De-Wen Wu, Ting Li, Kang-Jian Yang, Li Cheng, Zu-Ping Zhou, Shi-Ming Pu, Wan-Hua Lin
Arylurea derivatives, an important class of small molecules, have received considerable attention in recent years due to their wide range of biological applications. Various molecular targeted agents with arylurea scaffold as potential enzyme/receptor inhibitors were constructed with the successful development of sorafenib and regorafenib. This review focuses on those arylureas possessing anti-cancer activities from 2010 to date. According to their different mechanisms of action, these arylureas are divided into the following six categories: (1) Ras/Raf/MEK/ERK signaling pathway inhibitors; (2) tumor angiogenesis inhibitors, their targets include vascular endothelial growth factor receptors (VEGFRs), fibroblast growth factor receptors (FGFRs), platelet-derived growth factor receptors (PDGFRs), epidermal growth factor receptors (EGFRs), insulin-like growth factor 1 receptor (IGF-1R), Fms-like tyrosine kinase 3 (FLT3), c-Kit, MET, and Smoothened (Smo); (3) PI3K/AKT/mTOR signaling pathway inhibitors; (4) cell cycle inhibitors, their targets include checkpoint kinases (Chks), cyclin-dependent kinases (CDKs), Aurora, SUMO activating enzyme 1 (SUMO E1), tubulin, and DNA; (5) tumor differentiation, migration, and invasion inhibitors, their targets include matrix metalloproteinases (MMPs), LIM kinase (Limk), nicotinamide phosphoribosyltransferase (Nampt), and histone deacetylase (HDAC); (6) arylureas from the rational modification of natural products...
July 7, 2017: Current Topics in Medicinal Chemistry
https://www.readbyqxmd.com/read/28681594/chop-deficiency-ameliorates-erk5-inhibition-mediated-exacerbation-of-streptozotocin-induced-hyperglycemia-and-pancreatic-beta-cell-apoptosis
#7
Dae-Hwan Nam, Jung-Hwa Han, Jae Hyang Lim, Kwon Moo Park, Chang-Hoon Woo
Streptozotocin (STZ)-induced murine models of type 1 diabetes have been used to examine ER stress during pancreatic beta- cell apoptosis, as this ER stress plays important roles in the pathogenesis and development of the disease. However, the mechanisms linking type 1 diabetes and the ER stressmodulating anti-diabetic signaling pathway remain to be addressed, though it was recently established that ERK5 (Extracellular- signal-regulated kinase 5) contributes to the pathogeneses of diabetic complications. This study was undertaken to explore the mechanism whereby ERK5 inhibition instigates pancreatic beta-cell apoptosis via an ER stress-dependent signaling pathway...
July 6, 2017: Molecules and Cells
https://www.readbyqxmd.com/read/28674529/abl-tyrosine-kinase-regulates-hepatitis-c-virus-entry
#8
Saehong Min, Yun-Sook Lim, Dongjo Shin, Chorong Park, Jae-Bong Park, Seungtaek Kim, Marc P Windisch, Soon B Hwang
Abl is a central regulator of multiple cellular processes controlling actin dynamics, proliferation, and differentiation. Here, we showed that knockdown of Abl impaired hepatitis C virus (HCV) propagation. Treatment of Abl tyrosine kinase-specific inhibitor, imatinib and dasatinib, also significantly decreased HCV RNA and protein levels in HCV-infected cells. We showed that both imatinib and dasatinib selectively inhibited HCV infection at the entry step of HCV life cycle, suggesting that Abl kinase activity may be necessary for HCV entry...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28669853/effect-of-sirolimus-on-arteriosclerosis-induced-by-advanced-glycation-end-products-via-inhibition-of-the-ilk-mtor-pathway-in-kidney-transplantation-recipients
#9
Zhen Xu, Xuzhong Liu, Zijie Wang, Jun Tao, Zhijian Han, Min Gu, Wei Zhang, Ruoyun Tan
To investigate the effect and related mechanism of sirolimus (SRL) in arteriosclerosis(AS) induced by advanced glycation end products (AGEs) in kidney transplantation recipients (KTRs).Human kidney tissues from KTRs before and after treatment with SRL were assessed by hematoxylin-eosin and immunohistochemical staining. Rat vascular smooth muscle cells (VSMCs) were treated with AGEs and/or SRL. The expressions of α-smooth muscle actin (α-SMA), osteopontin (OPN), actinin-associated LIM protein (ALP), proliferating cell nuclear antigen (PCNA), integrin-linked kinase (ILK) and the mTOR signaling pathway proteins were examined using western blot assay...
June 29, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28669590/tranexamic-acid-inhibits-melanogenesis-by-activating-the-autophagy-system-in-cultured-melanoma-cells
#10
Yeong Hee Cho, Jung Eun Park, Do Sung Lim, Jung Sup Lee
BACKGROUND: As interest in skin beauty increases, the development of new skin whitening agents has attracted substantial attention; however, the action mechanism of the agents developed so far remains largely unknown. Tranexamic acid (TXA) is commonly being used to reduce melanin synthesis in patients with melasma and also used as a raw material for functional whitening cosmetics, although its action mechanism is poorly understood. Autophagy has been well known to be essential for tissue homeostasis, adaptation to starvation, and removal of dysfunctional organelles or pathogens...
June 7, 2017: Journal of Dermatological Science
https://www.readbyqxmd.com/read/28664914/lim-kinase-1-interacts-with-myosin-9-and-alpha-actinin-4-and-promotes-colorectal-cancer-progression
#11
Qing Liao, Rui Li, Rui Zhou, Zhihua Pan, Lijun Xu, Yanqing Ding, Liang Zhao
BACKGROUND: LIM kinase 1 (LIMK1) is a key regulator of the cytoskeletal organisation involved in cell proliferation and migration. Even though LIMK1 is frequently dysregulated in epithelial cancers, the role and mechanisms of LIMK1 in colorectal cancer (CRC) remains unclear. METHODS: Immunohistochemical analysis was performed to examine the expression and clinical significance of LIMK1 in CRC samples. Loss- and gain-of-function assay was performed to investigate the effects of aberrant expression on cellular biological behaviour of CRC cells in vitro and in vivo...
June 29, 2017: British Journal of Cancer
https://www.readbyqxmd.com/read/28657208/silibinin-stimluates-apoptosis-by-inducing-generation-of-ros-and-er-stress-in-human-choriocarcinoma-cells
#12
Jiyeon Ham, Whasun Lim, Fuller W Bazer, Gwonhwa Song
Silibinin is a flavonolignan extracted from seeds of milk thistles. Traditionally, it has been used as a therapeutic agent for liver disorders, and now it is well-known for its anti-cancer effects. However, studies on anti-cancer effects of silibinin on choriocarcinoma are very limited. Therefore, we performed proliferation and apoptosis assays to determine effects of silibinin on the viability of human choriocarcinoma (JAR and JEG3) cells. Our results showed that silibinin significantly inhibited proliferation and induced apoptosis in both JAR and JEG3 cells, and significantly increased reactive oxygen species (ROS) and lipid peroxidation...
June 28, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28656059/parkin-knockout-inhibits-neuronal-development-via-regulation-of-proteasomal-degradation-of-p21
#13
Mi Hee Park, Hwa-Jeong Lee, Hye Lim Lee, Dong Ju Son, Jung Hoon Ju, Byung Kook Hyun, Sung Hee Jung, Ju-Kyoung Song, Dong Hun Lee, Chul Ju Hwang, Sang Bae Han, Sanghyeon Kim, Jin Tae Hong
PARK2 encodes for the E3 ubiquitin ligase parkin and is implicated in the development of Parkinson's disease (PD). Although the neuroprotective role of parkin is well known, the mechanism of PARK2's function in neural stem differentiation has not yet been thoroughly studied. Co-expressions network analysis showed that synaptosomal-associated protein 25 (SNAP-25) and brain-derived neurotrophic factor (BDNF) were positively correlated with parkin, but negatively correlated with p21 in human patient brain. We investigated a link between the ubiquitin E3 ligase parkin and proteasomal degradation of p21 for the control of neural stem cell differentiation...
2017: Theranostics
https://www.readbyqxmd.com/read/28650458/duplicated-pollen-pistil-recognition-loci-control-intraspecific-unilateral-incompatibility-in-brassica-rapa
#14
Yoshinobu Takada, Kohji Murase, Hiroko Shimosato-Asano, Takahiro Sato, Honoka Nakanishi, Keita Suwabe, Kentaro K Shimizu, Yong Pyo Lim, Seiji Takayama, Go Suzuki, Masao Watanabe
In plants, cell-cell recognition is a crucial step in the selection of optimal pairs of gametes to achieve successful propagation of progeny. Flowering plants have evolved various genetic mechanisms, mediated by cell-cell recognition, to enable their pistils to reject self-pollen, thus preventing inbreeding and the consequent reduced fitness of progeny (self-incompatibility, SI), and to reject foreign pollen from other species, thus maintaining species identity (interspecific incompatibility)(1). In the genus Brassica, the SI system is regulated by an S-haplotype-specific interaction between a stigma-expressed female receptor (S receptor kinase, SRK) and a tapetum cell-expressed male ligand (S locus protein 11, SP11), encoded by their respective polymorphic genes at the S locus(2-6)...
June 26, 2017: Nature Plants
https://www.readbyqxmd.com/read/28638453/the-clinical-impact-of-c-met-over-expression-in-advanced-biliary-tract-cancer-btc
#15
Mi Hwa Heo, Hee Kyung Kim, Hansang Lee, Kyoung-Mee Kim, Jeeyun Lee, Se Hoon Park, Joon Oh Park, Ho Yeong Lim, Won Ki Kang, Young Suk Park, Seung Tae Kim
Background: c-MET is a proto-oncogene that encodes the tyrosine kinase receptor for hepatocyte growth factor (HGF). Activation of HGF-c-MET signaling involves cell invasiveness and evokes metastasis through direct involvement of tumor angiogenesis. However, the value of c-MET overexpression is still unknown in metastatic biliary tract cancer (BTC). Methods: We analyzed the incidence and clinicopathologic characteristics of c-MET overexpression in advanced BTC. Moreover, we investigated the value of c-MET overexpression in predicting response to gemicitabine plus cisplatin (GC), a first line standard regimen, and as a prognostic marker in metastatic BTC...
2017: Journal of Cancer
https://www.readbyqxmd.com/read/28634817/identification-of-the-acclimation-genes-in-transcriptomic-responses-to-heat-stress-of-white-pekin-duck
#16
Jun-Mo Kim, Kyu-Sang Lim, Mijeong Byun, Kyung-Tai Lee, Young-Rok Yang, Mina Park, Dajeong Lim, Han-Ha Chai, Han-Tae Bang, Jong Hwangbo, Yang-Ho Choi, Yong-Min Cho, Jong-Eun Park
White Pekin duck is an important meat resource in the livestock industries. However, the temperature increase due to global warming has become a serious environmental factor in duck production, because of hyperthermia. Therefore, identifying the gene regulations and understanding the molecular mechanism for adaptation to the warmer environment will provide insightful information on the acclimation system of ducks. This study examined transcriptomic responses to heat stress treatments (3 and 6 h at 35 °C) and control (C, 25 °C) using RNA-sequencing analysis of genes from the breast muscle tissue...
June 20, 2017: Cell Stress & Chaperones
https://www.readbyqxmd.com/read/28634071/the-novel-yap-target-gene-sgk1-upregulates-taz-activity-by-blocking-gsk3%C3%AE-mediated-taz-destabilization
#17
Geon Yoo, Tackhoon Kim, Chaeuk Chung, Deog-Su Hwang, Dae-Sik Lim
YAP (Yes-associated protein) and TAZ (transcription activator with PDZ binding motif) are important in tissue regeneration and cancer development, highlighting the importance of discovering partners that regulate their oncogenicity. SGK1 (serum/glucocorticoid regulated kinase 1), initially identified as a homolog of Akt in phosphoinositide 3-kinase signaling, acts as a serine/threonine protein kinase in multiple oncogenic pathways. However, possible links between SGK1 and Hippo-YAP/TAZ signaling remain unexplored...
June 17, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28625535/glial-specific-functions-of-microcephaly-protein-wdr62-and-interaction-with-the-mitotic-kinase-aurka-are-essential-for-drosophila-brain-growth
#18
Nicholas R Lim, Belal Shohayeb, Olga Zaytseva, Naomi Mitchell, S Sean Millard, Dominic C H Ng, Leonie M Quinn
The second most commonly mutated gene in primary microcephaly (MCPH) patients is wd40-repeat protein 62 (wdr62), but the relative contribution of WDR62 function to the growth of major brain lineages is unknown. Here, we use Drosophila models to dissect lineage-specific WDR62 function(s). Interestingly, although neural stem cell (neuroblast)-specific depletion of WDR62 significantly decreased neuroblast number, brain size was unchanged. In contrast, glial lineage-specific WDR62 depletion significantly decreased brain volume...
July 11, 2017: Stem Cell Reports
https://www.readbyqxmd.com/read/28622474/larch-arabinogalactan-attenuates-myocardial-injury-by-inhibiting-apoptotic-cascades-in-a-rat-model-of-ischemia-reperfusion
#19
Sun-Ha Lim
We reported previously that supplementation with apple pectin, a dietary fiber, reduced myocardial injury in a rat model of ischemia-reperfusion. In this study, we further investigated an arabinogalactan, one of the constituent polysaccharides of pectin, to determine which domains comprising pectin were responsible for the protection. In a rat model of 30-min ischemia followed by 3-h reperfusion, supplementation with larch arabinogalactan (LAG) over 50 mg/kg/day significantly reduced infarct size. Reverse transcription polymerase chain reaction (RT-PCR), immunohistochemistry, and immunoblot analyses showed that intake of LAG blocked the steps involved in apoptotic cascades through downregulation of gelsolin gene expression at the protein (Gelsolin) level, inhibition of p38 phosphorylation in mitogen-activated protein kinase (MAPK) pathways, decreased bax/bcl-2 ratio at the protein (Bax/Bcl-2) level, which was correlated with the ratio at the mRNA level, inhibition of the conversion of Procaspase protein to Caspase-3 protein, and consequently a decrease in apoptotic cells...
July 2017: Journal of Medicinal Food
https://www.readbyqxmd.com/read/28607076/functional-proteogenomics-reveals-biomarkers-and-therapeutic-targets-in-lymphomas
#20
Delphine C M Rolland, Venkatesha Basrur, Yoon-Kyung Jeon, Carla McNeil-Schwalm, Damian Fermin, Kevin P Conlon, Yeqiao Zhou, Samuel Y Ng, Chih-Chiang Tsou, Noah A Brown, Dafydd G Thomas, Nathanael G Bailey, Gilbert S Omenn, Alexey I Nesvizhskii, David E Root, David M Weinstock, Robert B Faryabi, Megan S Lim, Kojo S J Elenitoba-Johnson
Identification of biomarkers and therapeutic targets is a critical goal of precision medicine. N-glycoproteins are a particularly attractive class of proteins that constitute potential cancer biomarkers and therapeutic targets for small molecules, antibodies, and cellular therapies. Using mass spectrometry (MS), we generated a compendium of 1,091 N-glycoproteins (from 40 human primary lymphomas and cell lines). Hierarchical clustering revealed distinct subtype signatures that included several subtype-specific biomarkers...
June 20, 2017: Proceedings of the National Academy of Sciences of the United States of America
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