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https://www.readbyqxmd.com/read/28735164/vesicle-trafficking-in-plant-immunity
#1
REVIEW
Hye Sup Yun, Chian Kwon
To defend against extracellular pathogens, plants primarily depend on cell-autonomous innate immunity due to the lack of the circulatory immune system including mobile immune cells. To extracellularly restrict or kill the pathogens, plant cells dump out antimicrobials. However, since antimicrobials are also toxic to plant cells themselves, they have to be safely delivered to the target sites in a separate vesicular compartment. In addition, because immune responses often requires energy otherwise used for the other metabolic processes, it is very important to properly control the duration and strength of immune responses depending on pathogen types...
July 20, 2017: Current Opinion in Plant Biology
https://www.readbyqxmd.com/read/28735040/co-encapsulation-of-paclitaxel-and-c6-ceramide-in-tributyrin-containing-nanocarriers-improve-co-localization-in-the-skin-and-potentiate-cytotoxic-effects-in-2d-and-3d-models
#2
Vanessa F M Carvalho, Amanda Migotto, Daniela V Giacone, Débora P de Lemos, Thalita B Zanoni, Silvya S Maria-Engler, Leticia V Costa-Lotufo, Luciana B Lopes
Considering that tumor development is generally multifactorial, therapy with a combination of agents capable of potentiating cytotoxic effects is promising. In this study, we co-encapsulated C6 ceramide (0.35%) and paclitaxel (0.50%) in micro and nanoemulsions containing tributyrin (a butyric acid pro-drug included for potentiation of cytotoxicity), and compared their ability to co-localize the drugs in viable skin layers. The nanoemulsion delivered 2- and 2.4-fold more paclitaxel into viable skin layers of porcine skin in vitro at 4 and 8h post-application than the microemulsion, and 1...
July 19, 2017: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28734845/leveraging-siglec-8-endocytic-mechanisms-to-kill-human-eosinophils-and-malignant-mast-cells
#3
Jeremy A O'Sullivan, Daniela J Carroll, Yun Cao, Adriano N Salicru, Bruce S Bochner
BACKGROUND: Sialic acid-binding immunoglobulin-like lectin (Siglec)-8 is a cell-surface protein expressed selectively on human eosinophils, mast cells, and basophils, making it an ideal target for the treatment of diseases involving these cell types. However, the effective delivery of therapeutic agents to these cells requires an understanding of the dynamics of Siglec-8 surface expression. OBJECTIVE: To determine whether Siglec-8 is endocytosed in human eosinophils and malignant mast cells, identify mechanisms underlying its endocytosis, and demonstrate whether a toxin can be targeted to Siglec-8-bearing cells to kill these cells...
July 19, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28734664/ph-responsive-biodegradable-nanogels-for-sustained-release-of-bleomycin
#4
Prashant Sahu, Sushil K Kashaw, Varun Kushwah, Samaresh Sau, Sanyog Jain, Arun K Iyer
Site specific drug delivery with desired therapeutic effect still remains challenging task due to suboptimal release, tissue toxicity, low selectivity and meager therapeutic efficacy in skin cancers. The aim of the current study was to fabricate pH responsive, self-assembled, chemically cross-linked biodegradable chitosan nanogel loaded with bleomycin to target the dermal area of the skin. The nanogel synthesized by ion gelation technique and was characterized for drug loading, swelling and thermal stability followed by in vitro analysis...
June 27, 2017: Bioorganic & Medicinal Chemistry
https://www.readbyqxmd.com/read/28734644/postmastectomy-radiation-therapy-technique-and-cardiopulmonary-sparing-a-dosimetric-comparative-analysis-between-photons-and-protons-with-free-breathing-versus-deep-inspiration-breath-hold
#5
Sagar A Patel, Hsiao-Ming Lu, Jacqueline A Nyamwanda, Rachel B Jimenez, Alphonse G Taghian, Shannon M MacDonald, Nicolas Depauw
PURPOSE: Dosimetric studies have suggested greater cardiopulmonary sparing with protons over photons for left-sided postmastectomy radiation therapy (PMRT). Modern techniques such as deep inspiration breath hold (DIBH) can help spare the heart. This analysis compares photon and proton delivery with and without DIBH. METHODS AND MATERIALS: Ten women with left breast cancer referred for PMRT on a prospective clinical trial with unfavorable cardiac anatomy underwent free breathing (FB) and DIBH computed tomography simulation...
June 21, 2017: Practical Radiation Oncology
https://www.readbyqxmd.com/read/28734227/continuous-delivery-of-neutralizing-antibodies-elevate-ccl2-levels-in-mice-bearing-mcf10ca1d-breast-tumor-xenografts
#6
Min Yao, Curtis Smart, Qingting Hu, Nikki Cheng
Chemokines are small soluble molecules that play critical roles in wound healing, infection, and cancer progression. In particular, overexpression of the C-C motif chemokine ligand 2 (CCL2) in multiple cancer types correlates with poor patient prognosis. Animal studies have shown that CCL2 signals to macrophages and breast cancer cells to promote tumor growth, invasion, and metastasis, indicating that CCL2 is a promising therapeutic target. However, the effectiveness of human-specific neutralizing antibodies has not been fully evaluated...
July 19, 2017: Translational Oncology
https://www.readbyqxmd.com/read/28733723/an-individualized-radiation-dose-escalation-trial-in-non-small-cell-lung-cancer-based-on-fdg-pet-imaging
#7
Marie Wanet, Antoine Delor, François-Xavier Hanin, Benoît Ghaye, Aline Van Maanen, Vincent Remouchamps, Christian Clermont, Samuel Goossens, John Aldo Lee, Guillaume Janssens, Anne Bol, Xavier Geets
AIM: The aim of the study was to assess the feasibility of an individualized 18F fluorodeoxyglucose positron emission tomography (FDG-PET)-guided dose escalation boost in non-small cell lung cancer (NSCLC) patients and to assess its impact on local tumor control and toxicity. PATIENTS AND METHODS: A total of 13 patients with stage II-III NSCLC were enrolled to receive a dose of 62.5 Gy in 25 fractions to the CT-based planning target volume (PTV; primary turmor and affected lymph nodes)...
July 21, 2017: Strahlentherapie und Onkologie: Organ der Deutschen Röntgengesellschaft ... [et Al]
https://www.readbyqxmd.com/read/28733622/tumor-targeted-delivery-of-sirna-using-fatty-acyl-cgkrk-peptide-conjugates
#8
Meenakshi Sharma, Naglaa Salem El-Sayed, Hung Do, Keykavous Parang, Rakesh Kumar Tiwari, Hamidreza Montazeri Aliabadi
Tumor-targeted carriers provide efficient delivery of chemotherapeutic agents to tumor tissue. CGKRK is one of the well-known tumor targeting peptides with significant specificity for angiogenic blood vessels and tumor cells. Here, we designed fatty acyl conjugated CGKRK peptides, based on the hypothesis that hydrophobically-modified CGKRK peptide could enhance cellular permeation and delivery of siRNA targeted to tumor cells for effective silencing of selected proteins. We synthesized six fatty acyl-peptide conjugates, using a diverse chain of saturated and unsaturated fatty acids to study the efficiency of this approach...
July 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28733470/dendritic-cell-targeted-lentiviral-vector-immunization-uses-pseudotransduction-and-dna-mediated-sting-and-cgas-activation
#9
Jocelyn T Kim, Yarong Liu, Rajan P Kulkarni, Kevin K Lee, Bingbing Dai, Geoffrey Lovely, Yong Ouyang, Pin Wang, Lili Yang, David Baltimore
Dendritic cell (DC) activation and antigen presentation are critical for efficient priming of T cell responses. Here, we study how lentiviral vectors (LVs) deliver antigen and activate DCs to generate T cell immunization in vivo. We report that antigenic proteins delivered in vector particles via pseudotransduction were sufficient to stimulate an antigen-specific immune response. The delivery of the viral genome encoding the antigen increased the magnitude of this response in vivo but was irrelevant in vitro...
July 21, 2017: Science Immunology
https://www.readbyqxmd.com/read/28733370/reliable-adherence-to-a-copd-care-bundle-mitigates-system-level-failures-and-reduces-copd-readmissions-a-system-redesign-using-improvement-science
#10
Muhammad Ahsan Zafar, Ralph J Panos, Jonathan Ko, Lisa C Otten, Anthony Gentene, Maria Guido, Katherine Clark, Caroline Lee, Jamie Robertson, Evaline A Alessandrini
BACKGROUND: Readmissions of chronic obstructive pulmonary disease (COPD) have devastating effects on patient quality-of-life, disease progression and healthcare cost. Effective interventions to reduce COPD readmissions are needed. OBJECTIVES: Reduce 30-day all-cause readmissions by (1) creating a COPD care bundle that addresses care delivery failures, (2) using improvement science to achieve 90% bundle adherence. SETTING: An 800-bed academic hospital in Ohio, USA...
July 21, 2017: BMJ Quality & Safety
https://www.readbyqxmd.com/read/28733245/engineered-nanoparticles-for-the-detection-treatment-and-prevention-of-atherosclerosis-how-close-are-we
#11
REVIEW
Luong T H Nguyen, Aristo Muktabar, Jinkai Tang, Vinayak P Dravid, C Shad Thaxton, Subbu Venkatraman, Kee Woei Ng
Atherosclerosis is one of the leading causes of morbidity and mortality worldwide. Nanotechnology has provided the possibility of designing nanoparticles that can translocate through tissues and home in to atherosclerotic plaques to achieve desired diagnostic, therapeutic, theranostic or 'theralivery' outcomes. Although nanomedicine approaches have demonstrated exciting possibilities, clinical reality is still distant and challenges are aplenty, such as specificity of targeting and nanotoxicity. Nevertheless, developments in formulations, delivery strategies and experimental models over the coming years will generate new knowledge to define the true potential of this field...
July 18, 2017: Drug Discovery Today
https://www.readbyqxmd.com/read/28733244/response-surface-optimization-ex-vivo-and-in-vivo-investigation-of-nasal-spanlastics-for-bioavailability-enhancement-and-brain-targeting-of-risperidone
#12
Fatma Elzahraa Abdelrahman, Ibrahim Elsayed, Mary Kamal Gad, Ahmed Hassen Elshafeey, Magdi Ibrahim Mohamed
Transnasal brain drug targeting could ensure better drug delivery to the brain through the olfactory pathway. Risperidone bioavailability is 66% in extensive metabolizers and 82% in slow metabolizers. The aim of this study is to investigate the ability of the nanovesicular spanlastics to effectively deliver risperidone through the nasal route to the brain and increase its bioavailability. Spanlastics formulae, composed of span and polyvinyl alcohol, were designed based on central composite statistical design...
July 18, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28733079/is-an-admission-for-decompensated-heart-failure-inevitable
#13
REVIEW
Alexander J Blood, Ariane M Fraiche, Zubin J Eapen
Given the high prevalence of heart failure (HF) and the profound impact on morbid, mortality, and health care costs, strategies to improve outcomes and reduce cost have become progressively more attractive. Reducing HF hospitalizations as a study outcome has gained traction in recent years. The basic hypothesis of these investigations is that HF hospitalizations are preventable and harmful. This article examines advancements in pharmacotherapy, medical devices, and health care delivery techniques targeting reductions in HF hospitalizations and evaluates the role and implications of hospitalization in the natural history of HF...
July 18, 2017: Progress in Cardiovascular Diseases
https://www.readbyqxmd.com/read/28732931/ultrasound-assisted-synthesis-of-ph-responsive-nanovector-based-on-peg-chitosan-coated-magnetite-nanoparticles-for-5-fu-delivery
#14
Sepideh Khoee, Ali Saadatinia, Reza Bafkary
pH-responsive magnetic carriers at the nanoscale are one of the most important agents for the targeted treatment of cancer. In this study, Fe3O4 nanoparticles were prepared by co-precipitation method and functionalized with three types of PEG using ultrasound waves. PEGlated particles were modified with chitosan shell through ultrasound-assisted double emulsion method. The prepared material which was used as a pH responsive carrier for pinpointed 5-FU delivery. The chemico-physical properties of prepared nanoparticles have been investigated...
November 2017: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/28732245/interleukin-4-receptor-targeted-delivery-of-bcl-xl-sirna-sensitizes-tumors-to-chemotherapy-and-inhibits-tumor-growth
#15
Padmanaban Guruprasath, Jihoon Kim, Gowri Rangaswamy Gunassekaran, Lianhua Chi, Soyoun Kim, Rang-Woon Park, Sang-Hyun Kim, Moon-Chang Baek, Sang Mun Bae, Sang-Yeob Kim, Dong-Kyu Kim, In-Kyu Park, Won-Jong Kim, Byungheon Lee
IL-4 receptor (IL-4R) is commonly up-regulated on tumor cells, and interactions between the receptor and Interleukin-4 (IL-4) can induce the expression of anti-apoptotic proteins, including Bcl-xL. This contributes to tumor cell survival and their resistance to chemotherapy. In this study, we exploited IL-4R-targeted delivery of Bcl-xL siRNA to IL-4R-expressing tumor cells in order to sensitize them to chemotherapy. To target IL-4R, an IL-4R-binding peptide, IL4RPep-1, was attached to branched polyethyleneimine-superparamagnetic iron oxide nanoparticles (BPEI-SPION)...
July 15, 2017: Biomaterials
https://www.readbyqxmd.com/read/28732161/an-elegant-ph-responsive-nanovehicle-for-drug-delivery-based-on-triazine-dendrimer-modified-magnetic-nanoparticles
#16
Amir Landarani-Isfahani, Majid Moghadam, Shima Mohammadi, Maryam Royvaran, Naimeh Moshtael-Arani, Saghar Rezaei, Shahram Tangestaninejad, Valiollah Mirkhani, Iraj Mohammadpoor-Baltork
Owing to properties of magnetic nanoparticles and elegant three-dimensional macromolecule architectural features, dendrimeric structures have been investigated as nanoscale drug delivery systems. In this paper, a novel magnetic nanocarrier, generation two (G2) triazine dendrimer modified Fe3O4@SiO2 magnetic nanoparticles (MNP-G2), was designed, fabricated and characterized by Fourier transform infrared (FT-IR), thermal gravimetric analysis (TGA), vibrating sample magnetometer (VSM), field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM) and dynamic light scattering (DLS)...
July 21, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28731945/the-changing-paradigm-of-radiotherapy-in-the-elderly-population
#17
Myer Raphael Pfeffer, Philip Blumenfeld
There is increasing awareness of the special needs for care of the elderly cancer patient. Newer precise conformal radiotherapy techniques allow the safe delivery of higher doses of radiotherapy to the target tumor while reducing the dose to surrounding critical organs. This has led to a shortening of radiotherapy protocols for both curative and palliative indications. We review these novel techniques and protocols and the published clinical studies that include elderly patients treated with these techniques...
July 2017: Cancer Journal
https://www.readbyqxmd.com/read/28731876/neuraxial-drug-delivery-for-the-management-of-cancer-pain-cost-updates-and-society-guidelines
#18
Collin F M Clarke
PURPOSE OF REVIEW: The present study discusses the utilization of neuraxial drug delivery (NDD) for the management of cancer pain, based on recent trials, reviews, and guidelines with a focus on cost analysis. RECENT FINDINGS: Almost all recent publications suggest that more stringent research is needed to improve evidence on NDD, particularly as conflicting reports exist regarding cost effectiveness of drug delivery systems. The combination of local anesthetics and opioids, with or without clonidine, continues to be reported as beneficial with the utilization of patient controlled systems providing an advantage over continuous ones...
July 20, 2017: Current Opinion in Anaesthesiology
https://www.readbyqxmd.com/read/28731639/exploring-family-home-food-environments-household-resources-needed-to-utilise-weekly-deliveries-of-free-fruits-and-vegetables
#19
Sophie A Carty, Louise A Mainvil, John D Coveney
AIM: An adapted ethnographic approach was used to explore household factors that influence family fruit and vegetable consumption when access and cost barriers are removed. 'Structural' barriers, such as food affordability and accessibility, are likely to influence fruit and vegetable consumption in disadvantaged households, but households may require additional resources (human and social) to increase consumption. METHODS: Five low-income and five high-income households with children (N = 39 individuals) were observed in their home environment for three months...
April 2017: Nutrition & Dietetics: the Journal of the Dietitians Association of Australia
https://www.readbyqxmd.com/read/28731328/bisphosphonate-functionalized-hydroxyapatite-nanoparticles-for-the-delivery-of-the-bromodomain-inhibitor-jq1-in-the-treatment-of-osteosarcoma
#20
Victoria Wu, Jarrett Mickens, Vuk Uskokovic
Osteosarcoma (OS) is one of the most common neoplasia among children and its survival statistics have been stagnating since the combinatorial anticancer therapy triad was first introduced. Here we report on the assessment of the effect of hydroxyapatite (HAp) nanoparticles loaded with medronate, the simplest bisphosphonate, as a bone-targeting agent and JQ1, a small-molecule bromodomain inhibitor, as a chemotherapeutic in different 2D and 3D K7M2 OS in vitro models. Both additives decreased the crystallinity of HAp, but the effect was more intense for medronate because of its higher affinity for HAp...
July 21, 2017: ACS Applied Materials & Interfaces
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