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https://www.readbyqxmd.com/read/29454064/rna-based-micelles-a-novel-platform-for-chemotherapeutic-drug-loading-and-delivery
#1
Yi Shu, Hongran Yin, Mehdi Rajabi, Hui Li, Mario Vieweger, Sijin Guo, Dan Shu, Peixuan Guo
RNA can serve as powerful building blocks for bottom-up fabrication of nanostructures for biotechnological and biomedical applications. In addition to current self-assembly strategies utilizing base pairing, motif piling and tertiary interactions, we reported for the first time to build RNA based micellar nanoconstruct with a cholesterol molecule conjugated onto one helical end of a branched pRNA three-way junction (3WJ) motif. The resulting amphiphilic RNA micelles consist of a hydrophilic RNA head and a covalently linked hydrophobic lipid tail that can spontaneously assemble in aqueous solution via hydrophobic interaction...
February 14, 2018: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/29453982/glucagon-like-peptide-1-contributes-to-increases-abca1-expression-by-downregulating-mir-758-to-regulate-cholesterol-homeostasis
#2
Yue Yao, Qiang Li, Ping Gao, Wei Wang, Lili Chen, Jinchao Zhang, Yi Xu
Abnormal regulation of lipid metabolism is associated with type 2 diabetes mellitus (T2DM). GLP-1 as a new treatment for T2DM, has unique effects in modulating cholesterol homeostasis. However, the mechanism of this effect is largely missing. The aim of this study was to determine the effects of GLP-1 on cholesterol-induced lipotoxicity in hepatocytes and examine the underlying mechanisms. The cell viability was determined, and caspase-3 was used to detect the effects of GLP-1 on cholesterol-induced apoptosis...
February 14, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29453900/downregulation-of-reticulocalbin-1-differentially-facilitates-apoptosis-and-necroptosis-in-human-prostate-cancer-cells
#3
Xiaofei Liu, Nianzhao Zhang, Dawei Wang, Deyu Zhu, Quan Yuan, Xiulei Zhang, Lilin Qian, Huanmin Niu, Yi Lu, Guijie Ren, Keli Tian, Huiqing Yuan
Reticulocalbin 1 (RCN1), an endoplasmic reticulum (ER)-resident Ca 2+ -binding protein, is dysregulated in cancers, but its pathophysiological roles are largely unclear. Here, we demonstrate that RCN1 is overexpressed in clinical prostate cancer (PCa) samples, associated with Cyclin B, not Cyclin D1 expression, compared to that of benign tissues in a Chinese Han population. Downregulation of endogenous RCN1 significantly suppresses PCa cell viability and arrests the cell cycles of DU145 and LNCaP cells at the S and G2/M phases, respectively...
February 17, 2018: Cancer Science
https://www.readbyqxmd.com/read/29453790/amyloid-beta-1-40-is-associated-with-alterations-in-ng2-pericyte-population-ex-vivo-and-in-vitro
#4
Nina Schultz, Kristoffer Brännström, Elin Byman, Simon Moussaud, Henrietta M Nielsen, Anders Olofsson, Malin Wennström
The population of brain pericytes, a cell type important for vessel stability and blood brain barrier function, has recently been shown altered in patients with Alzheimer's disease (AD). The underlying reason for this alteration is not fully understood, but progressive accumulation of the AD characteristic peptide amyloid-beta (Aβ) has been suggested as a potential culprit. In the current study, we show reduced number of hippocampal NG2+ pericytes and an association between NG2+ pericyte numbers and Aβ1-40 levels in AD patients...
February 17, 2018: Aging Cell
https://www.readbyqxmd.com/read/29453720/cytotoxic-effect-of-chlorpyrifos-is-associated-with-activation-of-nrf-2-ho-1-system-and-inflammatory-response-in-tongue-of-male-wistar-rats
#5
Norhan M El-Sayed, Amal A M Ahmed, Manar A A Selim
Repeated administration of chlorpyrifos (CPF), an organophosphate pesticide, can increase the risk of oral cytotoxicity. The current study was designed to assess the mechanism by which CPF mediates its cytotoxic effect on lingual mucosa of rats. Twenty-four male Wistar rats were used in the present study and divided into three groups: group I: healthy rats (negative control), group II: rats treated with CPF 1/40 LD50 (3.375 mg/kg, orally/daily) for 28 days, group III: rats treated with CPF 1/10 LD50 (13.5 mg/kg, orally/daily) for 28 days...
February 16, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29453691/effect-of-phosphorylation-and-single-nucleotide-polymorphisms-on-caspase-substrates-processing
#6
Sonu Kumar, Piotr Cieplak
Posttranslational modifications that involve either reversible covalent modification of proteins or irreversible proteolysis are central to the regulation of key cellular mechanisms, including apoptosis, cell-cycle regulation and signal transduction. There is mounting evidence suggesting cross-talk between proteases and kinases. For instance: caspases, a class of proteases involved in programmed cell death-apoptosis, cleave a large set of various types of proteins. Simultaneously, kinases restrict caspase activity by phosphorylating their protein substrates in the vicinity of cleavage site...
February 16, 2018: Apoptosis: An International Journal on Programmed Cell Death
https://www.readbyqxmd.com/read/29453608/chemopreventive-action-of-imatinib-a-tyrosine-kinase-inhibitor-in-the-regulation-of-angiogenesis-and-apoptosis-in-rat-model-of-lung-cancer
#7
Kulvinder Kumar, Preety Ghanghas, S N Sanyal
The present study explored the events of angiogenesis and apoptosis in 7,12-dimethyl benz(a)anthracene (DMBA)-induced lung cancer in rat and its chemoprevention with Imatinib, a receptor tyrosine kinase inhibitor. Further, it includes lipopolysaccharide (LPS) mediating inflammation along with DMBA for the promotion of lung carcinogenesis. The animals received a single intratracheal instillation of DMBA (20 mg/kg body weight) in olive oil and LPS (0.6 mg/kg body weight) to induce tumors in 16 weeks. Besides morphology and histology of the lung tissues, RT-PCR, western blots, and immunofluorescence were performed for the expression of apoptotic and angiogenic proteins...
February 16, 2018: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/29453279/il-12-il-18-cosignaling-in-human-macrophages-and-lung-epithelial-cells-activates-cathelicidin-and-autophagy-inhibiting-intracellular-mycobacterial-growth
#8
Rui Yang, Enzhuo Yang, Ling Shen, Robert L Modlin, Hongbo Shen, Zheng W Chen
The ability of Mycobacterium tuberculosis to block host antimicrobial responses in infected cells provides a key mechanism for disease pathogenesis. The immune system has evolved to overcome this blockade to restrict the infection, but it is not clear whether two key innate cytokines (IL-12/IL-18) involved in host defense can enhance antimycobacterial mechanisms. In this study, we demonstrated that the combination of IL-12 and IL-18 triggered an antimicrobial response against mycobacteria in infected macrophages (THP-1 and human primary monocyte-derived macrophages) and pulmonary epithelial A549 cells...
February 16, 2018: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/29453087/interleukin-6-is-an-independent-predictor-of-progressive-atherosclerosis-in-the-carotid-artery-the-troms%C3%A3-study
#9
Agnethe Eltoft, Kjell Arne Arntzen, Tom Wilsgaard, Ellisiv B Mathiesen, Stein Harald Johnsen
BACKGROUND AND AIMS: Novel biomarkers are linked to cardiovascular disease (CVD). The aim of the present study was to investigate the association between 28 blood biomarkers and the formation and progression of carotid plaque. METHODS: In a nested case control study with 703 participants from the population based Tromsø Study, a large biomarker panel was measured in blood obtained at baseline. Carotid ultrasound was assessed both at baseline and at 6 years of follow-up...
February 7, 2018: Atherosclerosis
https://www.readbyqxmd.com/read/29453076/development-of-novel-synthesized-phthalazinone-based-parp-1-inhibitors-with-apoptosis-inducing-mechanism-in-lung-cancer
#10
Hadia Almahli, Elie Hadchity, Maiy Y Jaballah, Racha Daher, Hazem A Ghabbour, Maha M Kabil, Nasser S Al-Shakliah, Wagdy M Eldehna
Herein we report the synthesis of two series of 4-phenylphthalazin-1-ones 11a-i and 4- benzylphthalazin-1-ones 16a-h as anti-lung adenocarcinoma agents with potential inhibitory activity against PARP-1. All the newly synthesized phthalazinones were evaluated for their anti-proliferative activity against A549 lung carcinoma cell line. Phthalazinones 11c-i and 16b, c showed significant cytotoxic activity against A549 cells at different concentrations (0.1, 1 and 10 μM) for two time intervals (24 h and 48 h)...
February 7, 2018: Bioorganic Chemistry
https://www.readbyqxmd.com/read/29452853/the-impact-of-sex-steroid-agonists-and-antagonists-on-folliculogenesis-in-the-neonatal-porcine-ovary-via-cell-proliferation-and-apoptosis
#11
Katarzyna Knapczyk-Stwora, Malgorzata Grzesiak, Renata E Ciereszko, Elzbieta Czaja, Marek Koziorowski, Maria Slomczynska
The objective of the study was to examine the effects of androgen and estrogen agonists or antagonists on the follicle formation, ovarian cell proliferation and apoptosis as well as plasma steroid concentration in neonatal pigs. Piglets were injected with testosterone propionate (TP, 20 mg/kg bw), flutamide (FLU, 50 mg/kg bw), 4-tert-octylphenol (OP, 100 mg/kg bw), ICI 182,780 (ICI, 400 μg/kg bw), methoxychlor (MXC, 100 mg/kg bw) or corn oil (CTR, controls) between postnatal Days 1 and 10 (n = 4/group). Heart blood was collected and ovaries were excised from the 11-day-old piglets...
February 10, 2018: Theriogenology
https://www.readbyqxmd.com/read/29452828/glutamatergic-ventral-pallidal-neurons-modulate-activity-of-the-habenula-tegmental-circuitry-and-constrain-reward-seeking
#12
Jessica Tooley, Lauren Marconi, Jason Bondoc Alipio, Bridget Matikainen-Ankney, Polymnia Georgiou, Alexxai V Kravitz, Meaghan C Creed
BACKGROUND: The ability to appropriately integrate and respond to rewarding and aversive stimuli is essential for survival. The ventral pallidum (VP) plays a critical role in processing both rewarding and aversive stimuli. However, the VP is a heterogeneous structure, and how VP subpopulations integrate into larger reward networks to ultimately modulate these behaviors is not known. We identify a noncanonical population of glutamatergic VP neurons that play a unique role in responding to aversive stimuli and constraining inappropriate reward seeking...
January 12, 2018: Biological Psychiatry
https://www.readbyqxmd.com/read/29452280/sticholysin-ii-mediated-cytotoxicity-involves-the-activation-of-regulated-intracellular-responses-that-anticipates-cell-death
#13
Carmen Soto, Gretchen Bergado, Rancés Blanco, Tania Griñán, Hermis Rodríguez, Uris Ros, Fabiola Pazos, María Eliana Lanio, Ana María Hernández, Carlos Álvarez
Sticholysin II (StII) is a pore-forming toxin of biomedical interest that belongs to the actinoporin protein family. Sticholysins are currently under examination as an active immunomodulating component of a vaccinal platform against tumoral cells and as a key element of a nucleic acids delivery system to cell cytosol. These proteins form pores in the plasma membrane leading to ion imbalance and cell lysis. However, the intracellular mechanisms triggered by actinoporins upon binding to membranes and its consequences for cell death are barely understood...
February 13, 2018: Biochimie
https://www.readbyqxmd.com/read/29452093/autophagy-inhibition-enhances-anticancer-efficacy-of-artepillin-c-a-cinnamic-acid-derivative-in-brazilian-green-propolis
#14
Satoshi Endo, Manami Hoshi, Toshiyuki Matsunaga, Takahiro Inoue, Kenji Ichihara, Akira Ikari
Propolis, a resinous substance produced by honeybees, possesses various biological actions including anticancer activity towards tumor cells. Recently, the ethanol extract of Brazilian green propolis has been shown to induce autophagy, which is known to be induced in treatment of cancer cells with anticancer drugs, leading to cancer cell survival and decreased sensitivity to anticancer agents. In this study, we aimed to identify autophagy-inducing components of the propolis and elucidated the reciprocal relationship between anticancer cytotoxicity and protective autophagy in prostate cancer CWR22Rv1 cells...
February 13, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29452086/ameliorative-effects-of-clonidine-on-ethanol-induced-kidney-injury-in-rats-potential-role-for-imidazoline-1-receptor
#15
Nesreen M I M Elkomy, Islam A A E-H Ibrahim, Shimaa M Elshazly, Hassan M El-Fayoumi
Chronic alcoholism is a risk factor for kidney injury. Clonidine is an α 2 -adrenergic receptor/imidazoline-1 receptor agonist that can reduce blood pressure and maintain renal functions. This study aims to investigate the possible ameliorative effects of clonidine on ethanol induced kidney injury and its mechanism of action. Kidney injury was induced in rats by adding ethanol to drinking water for eight weeks. Clonidine effects on kidney functions and histopathology were measured. Moreover, phentolamine (α-adrenergic receptor antagonist), efaroxan (imidazoline-1 receptor antagonist) and rilmenidine (imidazoline-1 receptor agonist) were used to clarify the role of imidazoline-1 receptor in mediating renal ameliorative effects...
February 13, 2018: European Journal of Pharmacology
https://www.readbyqxmd.com/read/29451217/neuroprotective-mechanisms-of-rutin-for-spinal-cord-injury-through-anti-oxidation-and-anti-inflammation-and-inhibition-of-p38-mitogen-activated-protein-kinase-pathway
#16
Hong-Liang Song, Xiang Zhang, Wen-Zhao Wang, Rong-Han Liu, Kai Zhao, Ming-Yuan Liu, Wei-Ming Gong, Bin Ning
Rutin has anti-inflammatory, antioxidant, anti-viral, anti-tumor and immune regulatory effects. However, the neuroprotective effects of rutin in spinal cord injury are unknown. The p38 mitogen activated protein kinase (p38 MAPK) pathway is the most important member of the MAPK family that controls inflammation. We assumed that the mechanism of rutin in the repair of spinal cord injury is associated with the inhibition of p38 MAPK pathway. Allen's method was used to establish a rat model of spinal cord injury...
January 2018: Neural Regeneration Research
https://www.readbyqxmd.com/read/29450537/enhanced-expression-of-nlrp3-inflammasome-related-inflammation-in-diabetic-retinopathy
#17
Hui Chen, Xiongze Zhang, Nanying Liao, Lan Mi, Yuting Peng, Bing Liu, Shaochong Zhang, Feng Wen
Purpose: The aim of this study was to determine the association between nucleotide-binding and oligomerization domain (NOD)-like receptors (NLRs) family, pyrin domain-containing 3 (NLRP3) inflammasome-induced inflammation and disease severity in diabetic retinopathy (DR). Methods: Blood samples were collected from 64 patients with diabetes (DR, 43; without DR, 21) and 25 healthy controls. The protein and mRNA expression levels of NLRP3 inflammasomes in peripheral blood mononuclear cells were determined using western blotting and quantitative real-time reverse transcription-PCR...
February 1, 2018: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/29449668/rhinovirus-3c-protease-suppresses-apoptosis-and-triggers-caspase-independent-cell-death
#18
Mark Lötzerich, Pascal S Roulin, Karin Boucke, Robert Witte, Oleg Georgiev, Urs F Greber
Apoptosis and programmed necrosis (necroptosis) determine cell fate, and antagonize infection. Execution of these complementary death pathways involves the formation of receptor-interacting protein kinase 1 (RIPK1) containing complexes. RIPK1 binds to adaptor proteins, such as TRIF (Toll-IL-1 receptor-domain-containing-adaptor-inducing interferon-beta factor), FADD (Fas-associated-protein with death domain), NEMO (NF-κB regulatory subunit IKKγ), SQSTM1 (sequestosome 1/p62), or RIPK3 (receptor-interacting protein kinase 3), which are involved in RNA sensing, NF-κB signaling, autophagosome formation, apoptosis, and necroptosis...
February 15, 2018: Cell Death & Disease
https://www.readbyqxmd.com/read/29449600/glucocorticoids-promote-apoptosis-of-proinflammatory-monocytes-by-inhibiting-erk-activity
#19
Adrian Achuthan, Ahmad S M Aslam, Quyen Nguyen, Pui-Yeng Lam, Andrew J Fleetwood, Ashlee T Frye, Cynthia Louis, Ming-Chin Lee, Julia E Smith, Andrew D Cook, Moshe Olshansky, Stephen J Turner, John A Hamilton
Glucocorticoids (GCs) are potent anti-inflammatory drugs whose mode of action is complex and still debatable. One likely cellular target of GCs are monocytes/macrophages. The role of GCs in monocyte survival is also debated. Although both granulocyte macrophage-colony stimulating factor (GM-CSF) and macrophage-CSF (M-CSF) are important regulators of macrophage lineage functions including their survival, the former is often associated with proinflammatory functions while the latter is important in lineage homeostasis...
February 15, 2018: Cell Death & Disease
https://www.readbyqxmd.com/read/29449555/intravenous-injections-of-the-oncolytic-virus-m1-as-a-novel-therapy-for-muscle-invasive-bladder-cancer
#20
Cheng Hu, Ying Liu, Yuan Lin, Jian-Kai Liang, Wen-Wen Zhong, Ke Li, Wen-Tao Huang, De-Juan Wang, Guang-Mei Yan, Wen-Bo Zhu, Jian-Guang Qiu, Xin Gao
Muscle-invasive bladder cancer (MIBC) is associated with low survival and high recurrence rates even in cases in which patients receive systemic treatments, such as surgery and chemotherapy. Here, we found that a naturally existing alphavirus, namely, M1, selectively kills bladder cancer cells but not normal cells, findings supported by our observations of changes in viral replication and MIBC and patient-derived MIBC cell apoptosis. Transcriptome analysis revealed that interferon-stimulated genes (ISGs) are expressed at low levels in sensitive bladder cancer cells and high levels in resistant cells...
February 15, 2018: Cell Death & Disease
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