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Lipid storage cancer

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https://www.readbyqxmd.com/read/28617309/lipid-storage-and-autophagy-in-melanoma-cancer-cells
#1
Claudia Giampietri, Simonetta Petrungaro, Martina Cordella, Claudio Tabolacci, Luana Tomaipitinca, Antonio Facchiano, Adriana Eramo, Antonio Filippini, Francesco Facchiano, Elio Ziparo
Cancer stem cells (CSC) represent a key cellular subpopulation controlling biological features such as cancer progression in all cancer types. By using melanospheres established from human melanoma patients, we compared less differentiated melanosphere-derived CSC to differentiating melanosphere-derived cells. Increased lipid uptake was found in melanosphere-derived CSC vs. differentiating melanosphere-derived cells, paralleled by strong expression of lipogenic factors Sterol Regulatory Element-Binding Protein-1 (SREBP-1) and Peroxisome Proliferator-Activated Receptor-γ (PPAR-γ)...
June 15, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28605878/an-oasis-in-the-desert-of-cancer-chemotherapeutic-resistance-the-enlightenment-from-reciprocal-crosstalk-between-signaling-pathways-of-upr-and-autophagy-in-cancers
#2
REVIEW
Yuhang Zhang, Xianjun Qu, Lingfan Jiang
Endoplasmic reticulum (ER), principal but complex, functions as the pleiotropic organelle for proper protein folding, Ca(2+) storage as well as lipid and carbohydrate metabolisms. Diverse microenviromental insults including, but not limited to, inflammatory reaction, glucose imbalance and hypoxia, elicit the accumulation of potentially toxic unfolded proteins in the ER lumen. Under the condition of these cellular threats, the autophagy with the well-orchestrated program containing over 30 autophagy-related genes (ATGs) might be initiated for degrading and recycling of the cumulative misfolded proteins and other related abnormal cytoplasmic components...
August 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28527945/targeting-lipid-metabolism-of-cancer-cells-a-promising-therapeutic-strategy-for-cancer
#3
Qiuping Liu, Qing Luo, Alexander Halim, Guanbin Song
One of the most important metabolic hallmarks of cancer cells is deregulation of lipid metabolism. In addition, enhancing de novo fatty acid (FA) synthesis, increasing lipid uptake and lipolysis have also been considered as means of FA acquisition in cancer cells. FAs are involved in various aspects of tumourigenesis and tumour progression. Therefore, targeting lipid metabolism is a promising therapeutic strategy for human cancer. Recent studies have shown that reprogramming lipid metabolism plays important roles in providing energy, macromolecules for membrane synthesis, and lipid signals during cancer progression...
August 10, 2017: Cancer Letters
https://www.readbyqxmd.com/read/28504409/multifunctional-liposomes-for-image-guided-intratumoral-chemo-phototherapy
#4
Dyego Miranda, Kevin Carter, Dandan Luo, Shuai Shao, Jumin Geng, Changning Li, Upendra Chitgupi, Steven G Turowski, Nasi Li, G Ekin Atilla-Gokcumen, Joseph A Spernyak, Jonathan F Lovell
Intratumoral (IT) drug injections reduce systemic toxicity, but delivered volumes and distribution can be inconsistent. To improve IT delivery paradigms, porphyrin-phospholipid (PoP) liposomes are passively loaded with three hydrophilic cargos: sulforhodamine B, a fluorophore; gadolinium-gadopentetic acid, a magnetic resonance (MR) agent; and oxaliplatin, a colorectal cancer chemotherapeutic. Liposome composition is optimized so that cargo is retained in serum and storage, but is released in less than 1 min with exposure to near infrared light...
May 15, 2017: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/28433786/mucoadhesive-tetrahydrocannabinol-loaded-nlc-formulation-optimization-and-long-term-physicochemical-stability
#5
Ghaith Hommoss, Sung Min Pyo, Rainer H Müller
Tetrahydrocannabinol (THC) is used to treat pain in cancer patients. On the market there are mainly oral formulations. Especially to treat the problematic breakthrough pain in cancer, an easy applicable formulation with fast onset is desired. This formulation was developed as an aqueous nasal spray using nanostructured lipid carriers (NLC). The NLC were prepared with cetyl palmitate, having good miscibility with the oily THC and yielding particles with 1 year physical long-term stability. To make the particles mucoadhesive, small particles with diameters of about 200 nm were produced and additionally their surface positively charged using a cationic stabilizer...
April 19, 2017: European Journal of Pharmaceutics and Biopharmaceutics
https://www.readbyqxmd.com/read/28404922/adipophilin-as-prognostic-biomarker-in-clear-cell-renal-cell-carcinoma
#6
Yuri Tolkach, Christine Lüders, Sebastian Meller, Klaus Jung, Carsten Stephan, Glen Kristiansen
OBJECTIVE: To study the expression of adipophilin (PLIN2), a lipid storage-associated cell protein, in different subtypes of renal cell cancer and to elucidate its prognostic value. MATERIALS AND METHODS: Two-hundred-seventy-five patients with renal cell carcinoma (RCC) were included in this study. Immunohistochemistry with a polyclonal antibody to adipophilin was used on the tissue microarray (formalin-fixed, paraffin-embedded tissue) for detection of adipophilin...
April 25, 2017: Oncotarget
https://www.readbyqxmd.com/read/28402621/specific-imaging-of-intracellular-lipid-droplets-using-a-benzothiadiazole-derivative-with-solvatochromic-properties
#7
Hanna Appelqvist, Kati Stranius, Karl Börjesson, K Peter R Nilsson, Christine Dyrager
Altered lipid metabolism and extensive lipid storage in cells have been associated with various medical disorders, including cancer. The development of fluorescent probes that specifically accumulate in lipid deposits is therefore of great interest in order to study pathological processes that are linked to dysregulated lipogenesis. In the present study, we present a small fluorescent benzothiadiazole dye that specifically stains lipid droplets in living and fixated cells. The photophysical characterization of the probe revealed strong solvatochromic behavior, large Stokes shifts, and high fluorescent quantum yields in hydrophobic solvents...
April 26, 2017: Bioconjugate Chemistry
https://www.readbyqxmd.com/read/28352127/insights-from-engraftable-immunodeficient-mouse-models-of-hyperinsulinaemia
#8
Michelle L Maugham, Patrick B Thomas, Gabrielle J Crisp, Lisa K Philp, Esha T Shah, Adrian C Herington, Chen Chen, Laura S Gregory, Colleen C Nelson, Inge Seim, Penny L Jeffery, Lisa K Chopin
Hyperinsulinaemia, obesity and dyslipidaemia are independent and collective risk factors for many cancers. Here, the long-term effects of a 23% Western high-fat diet (HFD) in two immunodeficient mouse strains (NOD/SCID and Rag1 (-/-)) suitable for engraftment with human-derived tissue xenografts, and the effect of diet-induced hyperinsulinaemia on human prostate cancer cell line xenograft growth, were investigated. Rag1 (-/-)and NOD/SCID HFD-fed mice demonstrated diet-induced impairments in glucose tolerance at 16 and 23 weeks post weaning...
March 28, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28245613/from-lysosomal-storage-diseases-to-nkt-cell-activation-and-back
#9
REVIEW
Cátia S Pereira, Helena Ribeiro, M Fatima Macedo
Lysosomal storage diseases (LSDs) are inherited metabolic disorders characterized by the accumulation of different types of substrates in the lysosome. With a multisystemic involvement, LSDs often present a very broad clinical spectrum. In many LSDs, alterations of the immune system were described. Special emphasis was given to Natural Killer T (NKT) cells, a population of lipid-specific T cells that is activated by lipid antigens bound to CD1d (cluster of differentiation 1 d) molecules at the surface of antigen-presenting cells...
February 25, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28186986/common-cytotoxic-chemotherapeutics-induce-epithelial-mesenchymal-transition-emt-downstream-of-er-stress
#10
Parag P Shah, Tess V Dupre, Leah J Siskind, Levi J Beverly
Endoplasmic reticulum (ER) in eukaryotes is a main organelle involved in a wide variety of functions including calcium storage, lipid biosynthesis, protein folding and protein transport. Disruption of ER homeostasis leads to ER stress and activation of the unfolded protein response (UPR). We and others have previously found that ER stress induces EMT in different cellular systems. Induction of ER stress with chemical modulators of ER homeostasis was sufficient to activate an EMT-like state in all cellular systems tested...
April 4, 2017: Oncotarget
https://www.readbyqxmd.com/read/28107086/interaction-between-lipid-droplets-and-endoplasmic-reticulum-in-human-atherosclerotic-plaques
#11
Ida Perrotta
Lipid droplets (LDs) are intracellular organelles that are found in nearly all cell types, where they serve fundamental roles in lipid metabolism and energy homeostasis. Traditionally considered as simple lipid storage deposits, these dynamic and remarkable organelles have recently been implicated in a number of other cellular functions, ranging from protein storage and degradation to virus replication. Intracellular accumulation of LDs is also a hallmark feature of diverse human diseases including diabetes type II, obesity, hepatosteatosis, cancer, and atherosclerosis...
January 2017: Ultrastructural Pathology
https://www.readbyqxmd.com/read/28076839/chemotherapy-can-induce-weight-normalization-of-morbidly-obese-mice-despite-undiminished-ingestion-of-high-fat-diet
#12
Cheryl E Myers, Dominique B Hoelzinger, Tiffany N Truong, Lindsey A Chew, Arpita Myles, Leena Chaudhuri, Jan B Egan, Jun Liu, Sandra J Gendler, Peter A Cohen
Morbidly obese patients who accomplish substantial weight loss often display a long-term decline in their resting metabolism, causing even relatively restrained caloric intake to trigger a relapse to the obese state. Paradoxically, we observed that morbidly obese mice receiving chemotherapy for cancer experienced spontaneous weight reduction despite unabated ingestion of their high fat diet (HFD). This response to chemotherapy could also be achieved in morbidly obese mice without cancer. Optimally dosed methotrexate (MTX) or cyclophosphamide (CY) enabled the mice to completely and safely normalize their body weight despite continued consumption of obesogenic quantities of HFD...
January 17, 2017: Oncotarget
https://www.readbyqxmd.com/read/28025106/effect-of-lysosomotropic-molecules-on-cellular-homeostasis
#13
REVIEW
Omer F Kuzu, Mesut Toprak, M Anwar Noory, Gavin P Robertson
Weak bases that readily penetrate through the lipid bilayer and accumulate inside the acidic organelles are known as lysosomotropic molecules. Many lysosomotropic compounds exhibit therapeutic activity and are commonly used as antidepressant, antipsychotic, antihistamine, or antimalarial agents. Interestingly, studies also have shown increased sensitivity of cancer cells to certain lysosomotropic agents and suggested their mechanism of action as a promising approach for selective destruction of cancer cells...
December 23, 2016: Pharmacological Research: the Official Journal of the Italian Pharmacological Society
https://www.readbyqxmd.com/read/27965166/construction-and-evaluation-of-ph-sensitive-immunoliposomes-for-enhanced-delivery-of-anticancer-drug-to-erbb2-over-expressing-breast-cancer-cells
#14
Tianshu Li, Takuya Amari, Kentaro Semba, Tadashi Yamamoto, Shinji Takeoka
1,5-Dihexadecyl N,N-diglutamyl-lysyl-L-glutamate (GGLG) liposomes were previously developed to enhance drug delivery efficiency in tumor cells owing to its pH-responsive properties. Herein, we report the modification of GGLG liposomes by conjugating a Fab' fragment of an ErbB2 antibody to the terminus of PEG (polyethylene glycol)-lipid (Fab'-GGLG liposomes). The conjugation of Fab' fragments did not affect the antibody activity, drug (doxorubicin, DOX) encapsulation efficiency, stability during storage or pH-sensitivity...
April 2017: Nanomedicine: Nanotechnology, Biology, and Medicine
https://www.readbyqxmd.com/read/27928516/antioxidant-and-antiproliferative-activities-of-purslane-seed-oil
#15
Gai Guo, Li Yue, Shaoli Fan, Siqun Jing, Liang-Jun Yan
The aim of this study was to evaluate the antioxidant and antiproliferative activities of PSO in vitro and its application in horse oil storage. We determined the reducing power of PSO and its scavenging effects on hydroxyl (•OH) and 1,1-diphenyl-2-picrylhydrazyl radicals (DPPH•) and tested its stabilizing effects on horse oil storage. The results showed that PSO had remarkable, dose-dependent antioxidant activities, and it effectively prevented horse oil lipid oxidation. We treated cervical cancer HeLa cells, esophageal cancer Eca-109 cells and breast cancer MCF-7 cells with PSO using non-neoplastic monkey kidney Vero cells as controls...
June 2016: Journal of Hypertension: Open Access
https://www.readbyqxmd.com/read/27916803/advances-in-lipidomics-for-cancer-biomarkers-discovery
#16
REVIEW
Francesca Perrotti, Consuelo Rosa, Ilaria Cicalini, Paolo Sacchetta, Piero Del Boccio, Domenico Genovesi, Damiana Pieragostino
Lipids play critical functions in cellular survival, proliferation, interaction and death, since they are involved in chemical-energy storage, cellular signaling, cell membranes, and cell-cell interactions. These cellular processes are strongly related to carcinogenesis pathways, particularly to transformation, progression, and metastasis, suggesting the bioactive lipids are mediators of a number of oncogenic processes. The current review gives a synopsis of a lipidomic approach in tumor characterization; we provide an overview on potential lipid biomarkers in the oncology field and on the principal lipidomic methodologies applied...
November 28, 2016: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/27875786/inflammation-dysregulated-metabolism-and-aromatase-in-obesity-and-breast-cancer
#17
REVIEW
Heba Zahid, Evan R Simpson, Kristy A Brown
Obesity is associated with an increased risk of estrogen-dependent breast cancer after menopause. Adipose tissue undergoes important changes in obesity due to excess storage of lipids, leading to adipocyte cell death and the recruitment of macrophages. The resultant state of chronic low-grade inflammation is associated with the activation of NFkB signaling and elevated levels of aromatase, the rate-limiting enzyme in estrogen biosynthesis. This occurs not only in the visceral and subcutaneous fat, but also in the breast fat...
December 2016: Current Opinion in Pharmacology
https://www.readbyqxmd.com/read/27874018/three-dimensional-label-free-imaging-and-quantification-of-lipid-droplets-in-live-hepatocytes
#18
Kyoohyun Kim, SeoEun Lee, Jonghee Yoon, JiHan Heo, Chulhee Choi, YongKeun Park
Lipid droplets (LDs) are subcellular organelles with important roles in lipid storage and metabolism and involved in various diseases including cancer, obesity, and diabetes. Conventional methods, however, have limited ability to provide quantitative information on individual LDs and have limited capability for three-dimensional (3-D) imaging of LDs in live cells especially for fast acquisition of 3-D dynamics. Here, we present an optical method based on 3-D quantitative phase imaging to measure the 3-D structural distribution and biochemical parameters (concentration and dry mass) of individual LDs in live cells without using exogenous labelling agents...
November 22, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27789356/applications-of-lipid-nanoparticles-in-gene-therapy
#19
REVIEW
Ana Del Pozo-Rodríguez, María Ángeles Solinís, Alicia Rodríguez-Gascón
Solid lipid nanoparticles (SLNs) and nanostructured lipid carriers (NLCs) have been recognized, among the large number of non-viral vectors for gene transfection, as an effective and safety alternative to potentially treat both genetic and not genetic diseases. A key feature is the possibility to be designed to overcome the numerous challenges for successful gene delivery. Lipid nanoparticles (LNs) are able to overcome the main biological barriers for cell transfection, including degradation by nucleases, cell internalization intracellular trafficking, and selectively targeting to a specific cell type...
December 2016: European Journal of Pharmaceutics and Biopharmaceutics
https://www.readbyqxmd.com/read/27711377/encapsulation-capacity-and-natural-payload-delivery-of-an-anticancer-drug-from-boron-nitride-nanotube
#20
M El Khalifi, J Bentin, E Duverger, T Gharbi, H Boulahdour, F Picaud
The behavior of confined anticancer carboplatin (CPT) molecules in a single (10, 10) boron nitride nanotube (BNNT) was studied by means of molecular dynamics simulations. Our study revealed a very large storage capacity of BNNT. Analysis of the energy profiles depending on the number of confined molecules, and on their spatial organization allowed us to quantify the ability of BNNT to vectorize CPT. Indeed, BNNT despite its small radius presented a large inner volume that favored stable encapsulation of multiple active anticancer molecules...
September 14, 2016: Physical Chemistry Chemical Physics: PCCP
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