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https://www.readbyqxmd.com/read/29792888/oral-vitamin-a-coupled-valsartan-nanomedicine-high-hepatic-stellate-cell-receptors-accessibility-and-prolonged-enterohepatic-residence
#1
Nesrine S El-Mezayen, Wessam F El-Hadidy, Wessam M El-Refaie, Thanaa I Shalaby, Mahmoud M Khattab, Aiman S El-Khatib
So far, liver fibrosis still has no clinically-approved treatment. The loss of stored vitamin-A (VA ) in hepatic stellate cells (HSCs), the main regulators to hepatic fibrosis, can be applied as a mechanism for their targeting. Valsartan is a good candidate for this approach; it is a marketed oral-therapy with inverse- and partial-agonistic activity to the over-expressed angiotensin-II type1 receptor (AT1R) and depleted nuclear peroxisome proliferator-activated receptor-gamma (PPAR-γ), respectively, in activated HSCs...
May 21, 2018: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/29792833/self-diffusion-of-water-soluble-fullerene-derivatives-in-mouse-erythrocytes
#2
Irina Avilova, Ekaterina Khakina, Ol''ga Kraevaya, Alexander Kotelnikov, Raisa Kotelnikova, Pavel Troshin, Vitaliy Volkov
Self-diffusion of water-soluble fullerene derivative (WSFD) C60 [S(CH2 )3 SO3 Na]5 H in mouse red blood cells (RBC) was characterized by 1 H pulsed field gradient NMR technique. It was found that a fraction of fullerene molecules (~13% of the fullerene derivative added in aqueous RBC suspension) shows a self-diffusion coefficient of (5.5 ± 0.8)·10-12  m2 /s, which is matching the coefficient of the lateral diffusion of lipids in the erythrocyte membrane (DL  = (5.4 ± 0.8)·10-12  m2 /s). This experimental finding evidences the absorption of the fullerene derivative by RBC...
May 21, 2018: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/29791801/magnetically-controlled-liposome-aggregates-for-on-demand-release-of-reactive-payloads
#3
Jan Haša, Jaroslav Hanuš, Frantisek Stepanek
A colloidal system able to act as a miniature reactor for on-demand release of reactive payloads has been demonstrated. The system is based on sub-micrometers aggregates consisting of anionic liposomes that act as storage reservoirs for the reactants, superparamagnetic iron oxide nanoparticles (SPION) that enable magnetic positioning in space and controlled release of reactants from the liposomes by radiofrequency stimulation, and an oppositely charged polyelectrolyte (poly-L-lysine) that keeps the constituent elements within the aggregates at a defined ratio...
May 23, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29791797/modulating-macrophage-polarization-through-ccr2-inhibition-and-multivalent-engagement
#4
Michael B Deci, Scott W Ferguson, Sydney L Scatigno, Juliane Nguyen
Excessive or prolonged recruitment of inflammatory monocytes to damaged tissue can significantly worsen patient outcomes. Monocytes migrate to sites of tissue inflammation in response to high local concentrations of CCL2, a chemokine that binds to and signals through the CCR2 receptor. While the role of CCR2 in cellular migration is well studied, it is unclear how CCR2 inhibition affects macrophage polarization and if multivalency can increase downstream signaling effects. Using affinity selection with a phage library, we identified a novel scFv (58C) that binds specifically and with high affinity to the N-terminal domain of CCR2 (KD = 59...
May 23, 2018: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/29791241/neutrophil-mediated-delivery-of-pixantrone-loaded-liposomes-decorated-with-poly-sialic-acid-octadecylamine-conjugate-for-lung-cancer-treatment
#5
Xiang Luo, Ling Hu, Huangliang Zheng, Mingqi Liu, Xinrong Liu, Cong Li, Qiujun Qiu, Zitong Zhao, Xiaobo Cheng, Chaoyang Lai, Yuqing Su, Yihui Deng, Yanzhi Song
Poly(sialic acid) (PSA) is a natural hydrophilic biodegradable and non-immunogenic biopolymer, receptors for its monomer are expressed on peripheral blood neutrophils (PBNs), which plays important roles in the progression and invasion of tumors. A poly(sialic acid)-octadecylamine conjugate (PSA-ODA) was synthesized and then anchor it on the surface of liposomal pixantrone (Pix-PSL), to achieve an improved anticancer effect. The liposomes were prepared using a remote loading method via a pH gradient, and then assessed for particle size, zeta potential encapsulation efficiency, in vitro release, and in vitro cytotoxicity...
November 2018: Drug Delivery
https://www.readbyqxmd.com/read/29791137/the-chemistry-of-lyophilized-blood-products
#6
Joseph Fernandez-Moure, Nuzhat Maisha, Erin B Lavik, Jeremy Cannon
With the development of new biologics and bioconjugates, storage and preservation have become more critical than ever before. Lyophilization is a method of cell and protein preservation by removing a solvent such as water from a substance followed by freezing. This technique has been used in the past and still holds promise for overcoming logistic challenges in safety net hospitals with limited blood banking resources, austere environments such as combat, and in mass casualty situations where existing resources may be outstripped...
May 23, 2018: Bioconjugate Chemistry
https://www.readbyqxmd.com/read/29790825/epidemiological-and-clinical-features-of-visceral-leishmaniasis-in-children-in-alicante-province-spain
#7
Jose M Ramos, Agustin Clavijo, Luis Moral, Cesar Gavilan, Tatiana Salvador, Javier González de Dios
Background Visceral leishmaniasis (VL) is endemic to the Mediterranean basin. In children, VL often presents with non-specific symptoms and can be life-threatening without proper treatment. Aim To describe the epidemiological and clinical features of pediatric VL in children in Alicante, Spain. Methods The study included all paediatric (<15 years) cases admitted to three hospitals in the province of Alicante from May 1992 to May 2015 with diagnosis of VL (detection was either by anti-Leishmania antibodies in serology or Leishmania in blood and/or bone marrow aspirates)...
May 23, 2018: Paediatrics and International Child Health
https://www.readbyqxmd.com/read/29790744/myristic-acid-modified-da7r-peptide-for-whole-process-glioma-targeted-drug-delivery
#8
Man Ying, Songli Wang, Mingfei Zhang, Ruifeng Wang, Hangchang Zhu, Huitong Ruan, Danni Ran, Zhilan Chai, Xiaoyi Wang, Weiyue Lu
Clinical treatment of aggressive glioma has been a great challenge, mainly due to the complexity of glioma microenvironment and the existence of blood-brain tumor barrier (BBTB)/blood-brain barrier (BBB), which severely hamper the effective accumulation of most therapeutic agents in glioma region. Additionally, vasculogenic mimicry (VM), angiogenesis and glioma stem cells (GSC) in malignant glioma also lead to the failure of clinical therapy. To address the aforementioned issues, a whole-process glioma targeted drug delivery strategy was proposed...
May 23, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29790395/hyaluronic-acid-conjugated-ph-sensitive-liposomes-for-targeted-delivery-of-prednisolone-on-rheumatoid-arthritis-therapy
#9
Virgínia M Gouveia, José Lopes-de-Araújo, Sofia A Costa Lima, Cláudia Nunes, Salette Reis
AIM: The treatment of rheumatoid arthritis remains a challenge as available therapies still entail the risk of deleterious off-target effects. The present study describes hyaluronic acid-conjugated pH-sensitive liposomes as an effective drug delivery-targeting strategy to synovial cells. MATERIALS & METHODS: Therapeutic, cytotoxic and targeting potential of developed liposomes were studied in vitro using macrophages and fibroblasts cell lines. RESULTS & CONCLUSION: Results suggest an enhanced cellular uptake of conjugated liposomes, mainly mediated by caveolae- and clathrin-dependent endocytosis...
May 2018: Nanomedicine
https://www.readbyqxmd.com/read/29790374/hybrid-liposomes-showing-enhanced-accumulation-in-tumors-as-theranostic-agents-in-the-orthotopic-graft-model-mouse-of-colorectal-cancer
#10
Masaki Okumura, Hideaki Ichihara, Yoko Matsumoto
Hybrid liposomes (HLs) can be prepared by simply sonicating a mixture of vesicular and micellar molecules in a buffer solution. This study aimed to elucidate the therapeutic effects and ability of HLs to detect (diagnosis) cancer in an orthotopic graft mouse model of colorectal cancer with HCT116 cells for the use of HLs as theranostic agents. In the absence of a chemotherapeutic drug, HLs exhibited therapeutic effects by inhibiting the growth of HCT116 colorectal cancer cells in vitro, possibly through an increase in apoptosis...
November 2018: Drug Delivery
https://www.readbyqxmd.com/read/29790342/high-permeation-rates-in-liposome-systems-explain-rapid-glyphosate-biodegradation-associated-with-strong-isotope-fractionation
#11
Benno Ehrl, Emmanuel O Mogusu, Kyoungtea Kim, Heike Hofstetter, Joel A Pedersen, Martin Elsner
Bacterial uptake of charged organic pollutants such as the widely used herbicide glyphosate is typically attributed to active transporters, whereas passive membrane permeation as an uptake pathway is usually neglected. For 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine (POPC) liposomes, pH-dependent membrane permeation coefficients (Papp) of glyphosate, determined by nuclear magnetic resonance (NMR) spectroscopy, varied from Papp(pH 7.0) = 3.7 (+/-0.3) × 10-7 m∙s-1 to Papp(pH 4.1) = 4.2 (+/-0.1) × 10-6 m∙s-1...
May 23, 2018: Environmental Science & Technology
https://www.readbyqxmd.com/read/29790304/reducing-bacterial-infections-and-biofilm-formation-using-nanoparticles-and-nanostructured-antibacterial-surfaces
#12
REVIEW
Gujie Mi, Di Shi, Mian Wang, Thomas J Webster
With the rapid spreading of resistance among common bacterial pathogens, bacterial infections, especially antibiotic-resistant bacterial infections, have drawn much attention worldwide. In light of this, nanoparticles, including metal and metal oxide nanoparticles, liposomes, polymersomes, and solid lipid nanoparticles, have been increasingly exploited as both efficient antimicrobials themselves or as delivery platforms to enhance the effectiveness of existing antibiotics. In addition to the emergence of widespread antibiotic resistance, of equal concern are implantable device-associated infections, which result from bacterial adhesion and subsequent biofilm formation at the site of implantation...
May 22, 2018: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/29790292/failure-of-voriconazole-therapy-due-to-acquired-azole-resistance-in-aspergillus-fumigatus-in-a-kidney-transplant-recipient-with-chronic-necrotizing-aspergillosis
#13
Benoit Pilmis, Dea Garcia-Hermoso, Alexandre Alanio, Emilie Catherinot, Anne Scemla, Vincent Jullien, Stéphane Bretagne, Olivier Lortholary
Invasive aspergillosis (IA) affects lungs and disseminates mostly in patients with neutropenia and/or receiving immunosuppressive and steroid therapies. Despite progress in diagnosis and therapy of IA, it is still characterized by a high mortality rate. Currently, voriconazole is considered as the standard therapy for invasive aspergillosis. Over the recent years, triazole resistant Aspergillus fumigatus isolates have emerged in the environment due to the use of fungicidal agricultural products with the risk of developing IA related to a resistant isolate...
May 22, 2018: American Journal of Transplantation
https://www.readbyqxmd.com/read/29787389/liposomal-bupivacaine-does-not-reduce-inpatient-opioid-prescription-or-related-complications-after-knee-arthroplasty-a-database-analysis
#14
Lukas Pichler, Jashvant Poeran, Nicole Zubizarreta, Crispiana Cozowicz, Eric C Sun, Madhu Mazumdar, Stavros G Memtsoudis
BACKGROUND: Although some trials suggest benefits of liposomal bupivacaine, data on real-world use and effectiveness is lacking. This study analyzed the impact of liposomal bupivacaine use (regardless of administration route) on inpatient opioid prescription, resource utilization, and opioid-related complications among patients undergoing total knee arthroplasties with a peripheral nerve block. It was hypothesized that liposomal bupivacaine has limited clinical influence on the studied outcomes...
May 21, 2018: Anesthesiology
https://www.readbyqxmd.com/read/29785613/neuroinfections-caused-by-fungi
#15
REVIEW
Katarzyna Góralska, Joanna Blaszkowska, Magdalena Dzikowiec
BACKGROUND: Fungal infections of the central nervous system (FIs-CNS) have become significantly more common over the past 2 decades. Invasion of the CNS largely depends on the immune status of the host and the virulence of the fungal strain. Infections with fungi cause a significant morbidity in immunocompromised hosts, and the involvement of the CNS may lead to fatal consequences. METHODS: One hundred and thirty-five articles on fungal neuroinfection in PubMed, Google Scholar, and Cochrane databases were selected for review using the following search words: "fungi and CNS mycoses", CNS fungal infections", "fungal brain infections", " fungal cerebritis", fungal meningitis", "diagnostics of fungal infections", and "treatment of CNS fungal infections"...
May 21, 2018: Infection
https://www.readbyqxmd.com/read/29785318/role-of-nanotechnology-in-cosmeceuticals-a-review-of-recent-advances
#16
REVIEW
Shreya Kaul, Neha Gulati, Deepali Verma, Siddhartha Mukherjee, Upendra Nagaich
Nanotechnology manifests the progression in the arena of research and development, by increasing the efficacy of the product through delivery of innovative solutions. To overcome certain drawbacks associated with the traditional products, application of nanotechnology is escalating in the area of cosmeceuticals. Cosmeceuticals are regarded as the fastest growing segment of the personal care industry and the use has risen drastically over the years. Nanocosmeceuticals used for skin, hair, nail, and lip care, for conditions like wrinkles, photoaging, hyperpigmentation, dandruff, and hair damage, have come into widespread use...
2018: Journal of Pharmaceutics
https://www.readbyqxmd.com/read/29785106/sn38-loaded-100-nm-targeted-liposomes-for-improving-poor-solubility-and-minimizing-burst-release-and-toxicity-in-vitro-and-in-vivo-study
#17
Yi-Ping Fang, Chih-Hung Chuang, Yi-Jhun Wu, Hsin-Che Lin, Yun-Chi Lu
Background: SN38 (7-ethyl-10-hydroxycamptothecin) is a camptothecin derivative acts against various tumors. However, SN38 is hydrolyzed in the physiological environment (pH 7.4), and this instability interferes with its potential therapeutic effect. Our objective was to investigate SN38-loaded liposomes to overcome the poor solubility of SN38 and its biodistribution, which further diminish its toxicity. Materials and methods: The sub-100 nm targeted liposomes was employed to deliver SN-38 and evaluate the characterization, release behaviors, cytotoxicity, in vivo pharmacokinetics and biochemical assay...
2018: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/29785035/optimized-delivery-of-sirna-into-3d-tumor-spheroid-cultures-in-situ
#18
R G Morgan, A C Chambers, D N Legge, S J Coles, A Greenhough, A C Williams
3D tissue culture provides a physiologically relevant and genetically tractable system for studying normal and malignant human tissues. Despite this, gene-silencing studies using siRNA has proved difficult. In this study, we have identified a cause for why traditional siRNA transfection techniques are ineffective in eliciting gene silencing in situ within 3D cultures and proposed a simple method for significantly enhancing siRNA entry into spheroids/organoids. In 2D cell culture, the efficiency of gene silencing is significantly reduced when siRNA complexes are prepared in the presence of serum...
May 21, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29784509/lactoferrin-modified-betulinic-acid-loaded-plga-nanoparticles-are-strong-anti-leishmanials
#19
Asim Halder, Divanshu Shukla, Suvadra Das, Partha Roy, Arup Mukherjee, Bhaskar Saha
Visceral Leishmaniasis (VL), caused by the protozoan parasite Leishmania donovani, is a potentially fatal disease. The only orally bioavailable drug miltefosine is toxic and the effective liposomal Amphotericin B (AmBisome) is limited by its prohibitive cost and requirement for parenteral administration. Therefore, finding a new potential drug candidate and an alternative delivery system is imperative. We report that Betulinic acid (BA), a pentacyclic triterpenoid from Betula alba bark, was loaded onto uniformly spherical PLGA nanoparticles (BANPs; diameter 187...
May 18, 2018: Cytokine
https://www.readbyqxmd.com/read/29783687/impact-of-particle-size-and-polydispersity-index-on-the-clinical-applications-of-lipidic-nanocarrier-systems
#20
REVIEW
M Danaei, M Dehghankhold, S Ataei, F Hasanzadeh Davarani, R Javanmard, A Dokhani, S Khorasani, M R Mozafari
Lipid-based drug delivery systems, or lipidic carriers, are being extensively employed to enhance the bioavailability of poorly-soluble drugs. They have the ability to incorporate both lipophilic and hydrophilic molecules and protecting them against degradation in vitro and in vivo. There is a number of physical attributes of lipid-based nanocarriers that determine their safety, stability, efficacy, as well as their in vitro and in vivo behaviour. These include average particle size/diameter and the polydispersity index (PDI), which is an indication of their quality with respect to the size distribution...
May 18, 2018: Pharmaceutics
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