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Liposomes and skin

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https://www.readbyqxmd.com/read/28428089/enhanced-anti-rheumatic-activity-of-methotrexate-entrapped-ultradeformable-liposomal-gel-in-adjuvant-induced-arthritis-rat-model
#1
Alam Zeb, Omer Salman Qureshi, Chan-Hee Yu, Muhammad Akram, Hyung-Seo Kim, Myung-Sic Kim, Jong-Ho Kang, Arshad Majid, Sun-Young Chang, Ok-Nam Bae, Jin-Ki Kim
The aim of this study is to investigate in vivo anti-rheumatic activity of methotrexate-entrapped ultradeformable liposomal gel (MTX-UDLs-gel) in adjuvant-induced arthritis rat model. Methotrexate-entrapped ultradeformable liposomes (MTX-UDLs) with the optimal phosphatidylcholine to Tween 80 ratio (7:3, w/w) were incorporated into 1% Carbopol gel. MTX-UDLs-gel was characterized in terms of appearance, clarity, homogeneity, pH and drug content. The permeation of MTX-UDLs-gel across rat skin was investigated using Franz diffusion cell...
April 17, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28412651/time-dependent-effect-of-rutin-on-skin-fibroblasts-membrane-disruption-following-uv-radiation
#2
Agnieszka Gęgotek, Katarzyna Bielawska, Michał Biernacki, Izabela Dobrzyńska, Elżbieta Skrzydlewska
Chronic exposure of the skin to solar UV radiation induces a number of biological alterations, including a redox imbalance; therefore, there is an urgent need for skin cells protective compounds. The aim of this study was to determine the effects of natural, previously extensively examined, polyphenol with antioxidant properties - rutin, on UV-induced skin fibroblasts membrane disruption. Accordingly, fibroblasts exposed to UVA and UVB irradiation were incubated with rutin (12h before and/or up to 24h after irradiation), and the structural and metabolic changes were examined...
April 9, 2017: Redox Biology
https://www.readbyqxmd.com/read/28411056/development-and-evaluation-of-resveratrol-vitamin-e-and-epigallocatechin-gallate-loaded-lipid-nanoparticles-for-skin-care-applications
#3
Jin Chen, Ning Wei, Maria Lopez-Garcia, Dianna Ambrose, Jason Lee, Colin Annelin, Teresa Peterson
Solid lipid nanoparticles (SLN) and nanostructured lipid carriers (NLC) have been studied as potential carriers for both dermal and transdermal drug delivery. SLN contain lipid droplets that are fully crystallized and have a highly-ordered crystalline structure. NLC are modified SLN in which the lipid phase contains both solid and liquid lipids at room temperature. SLN and NLC are thought to combine the advantages of polymeric particles, liposomes and emulsions. Therefore they provide high encapsulation percentages, better protection for incorporated actives and allow for control of desired release profile...
April 11, 2017: European Journal of Pharmaceutics and Biopharmaceutics
https://www.readbyqxmd.com/read/28409629/tuning-the-extent-and-depth-of-penetration-of-flexible-liposomes-in-human-skin
#4
Silvia Franzè, Giulia Donadoni, Alessandro Podestà, Patrizia Procacci, Marica Orioli, Marina Carini, Paola Minghetti, Francesco Cilurzo
In this work we made an attempt to assess the effect of drug-induced changes of flexibility on the penetration of deformable vesicles into the human skin. Eight cationic liposomes with different degrees of flexibility were obtained by entrapping unfractionated heparin, enoxaparin and nadroparin. The deformability was studied by a novel, facile and reliable extrusion assay appositely developed and validated by means of quantitative nanoscale mechanical AFM measurements of vesicle elastic modulus (log10(YM))...
April 14, 2017: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/28409561/the-most-prevalent-side-effects-of-pegylated-liposomal-doxorubicin-monotherapy-in-women-with-metastatic-breast-cancer-a-systematic-review-of-clinical-trials
#5
REVIEW
L Ansari, F Shiehzadeh, Z Taherzadeh, S Nikoofal-Sahlabadi, A A Momtazi-Borojeni, A Sahebkar, S Eslami
Despite benefits of systemic chemotherapy in breast cancer treatment, several patients with early-stage breast cancer will develop metastatic breast cancer (MBC). Doxorubicin is among the most active agents against MBC. However, the use of doxorubicin is related to some life-threatening side effects including cardiotoxicity. Many efforts were made to lessen the side effects of doxorubicin and improve its efficacy. Pegylated liposomal doxorubicin (PLD) is a product claimed to achieve these two objectives because of its different pharmacokinetic profile...
April 14, 2017: Cancer Gene Therapy
https://www.readbyqxmd.com/read/28391065/novel-lipoproteoplex-delivers-keap1-sirna-based-gene-therapy-to-accelerate-diabetic-wound-healing
#6
Piul S Rabbani, Anna Zhou, Zachary M Borab, Joseph A Frezzo, Nikita Srivastava, Haresh T More, William J Rifkin, Joshua A David, Samuel J Berens, Raymond Chen, Sophia Hameedi, Muhammad H Junejo, Camille Kim, Rita A Sartor, Che F Liu, Pierre B Saadeh, Jin K Montclare, Daniel J Ceradini
Therapeutics utilizing siRNA are currently limited by the availability of safe and effective delivery systems. Cutaneous diseases, specifically ones with significant genetic components are ideal candidates for topical siRNA based therapy but the anatomical structure of skin presents a considerable hurdle. Here, we optimized a novel liposome and protein hybrid nanoparticle delivery system for the topical treatment of diabetic wounds with severe oxidative stress. We utilized a cationic lipid nanoparticle (CLN) composed of 1,2-dioleoyl-3-trimethylammonium-propane (DOTAP) and the edge activator sodium cholate (NaChol), in a 6:1 ratio of DOTAP:NaChol (DNC)...
April 3, 2017: Biomaterials
https://www.readbyqxmd.com/read/28370978/ghk-cu-liposomes-accelerate-scald-wound-healing-in-mice-by-promoting-cell-proliferation-and-angiogenesis
#7
Xinying Wang, Baoquan Liu, Qiang Xu, Haiyang Sun, Meijun Shi, Dan Wang, Meihua Guo, Jiawen Yu, Chunhui Zhao, Bin Feng
Glycyl-l-histidyl-l-lysine (GHK)-Cu is considered to be an activator of tissue remodeling, and has been used in cosmetic products. In this study, we prepared liposomes encapsulating GHK-Cu and analyzed their effect on human umbilical vein endothelial cells (HUVECs) proliferation and scald wound healing in mice. The nano- scaled GHK-Cu-liposomes promoted HUVECs proliferation, with a 33.1% increased rate. Flow cytometry analysis showed increased cell number at G1 stage and decreased cell number at G2 stage after GHK-Cu-liposomes treatment...
April 1, 2017: Wound Repair and Regeneration
https://www.readbyqxmd.com/read/28361609/skin-cancer-symptoms-mechanistic-pathways-and-treatment-rationale-for-therapeutic-delivery
#8
Neha Goyal, Purva Thatai, Bharti Sapra
Cancer is a group of diseases categorized by abandoning escalation and multiplication of abnormal cells. Current topical treatments for skin cancer are mainly in the semisolid dosage forms of 5-fluorouracil, imiquimod, etc. Many surgical treatments are also available these days for the treatment of skin cancer, for example, photodynamic therapy, which is approved by the US FDA. The stratum corneum is the main barrier against permeation of topical formulations developed for skin cancer treatment. Liposomes, thermosensitive stealth liposomes, nanoemulsions and polymeric lipid nanoparticles have been used by several researchers to increase skin permeability...
March 2017: Therapeutic Delivery
https://www.readbyqxmd.com/read/28355466/invasive-mould-infections-in-the-icu-setting-complexities-and-solutions
#9
Matteo Bassetti, Emilio Bouza
Infections caused by filamentous fungi represent a major burden in the ICU. Invasive aspergillosis is emerging in non-neutropenic individuals with predisposing conditions, e.g. corticosteroid treatment, chronic obstructive pulmonary disease, liver cirrhosis, solid organ cancer, HIV infection and transplantation. Diagnosis is challenging because the signs and symptoms are non-specific, and initiation of additional diagnostic examinations is often delayed because clinical suspicion is low. Isolation of an Aspergillus species from the respiratory tract in critically ill patients, and tests such as serum galactomannan, bronchoalveolar lavage 1-3-β-d-glucan and specific PCR should be interpreted with caution...
March 1, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/28342238/a-peel-off-facial-mask-comprising-myoinositol-and-trehalose-loaded-liposomes-improves-adult-female-acne-by-reducing-local-hyperandrogenism-and-activating-autophagy
#10
Gabriella Fabbrocini, Claudia Capasso, Marianna Donnarumma, Mariateresa Cantelli, Michel Le Maître, Giuseppe Monfrecola, Enzo Emanuele
BACKGROUND: Hyperandrogenism and reduced skin autophagy have been implicated in the pathogenesis of adult female acne (AFA). Here, we tested whether a ready-to-use peel-off facial mask containing myoinositol (an androgen inhibitor) and trehalose-loaded liposomes (as activators of cutaneous autophagy) applied overnight every other day for 60 days can improve AFA. We also sought to investigate the molecular mechanisms underlying the clinical effects. OBJECTIVES: We conducted an uncontrolled, open-label clinical study in 40 cases of AFA to investigate the effect of the facial mask on lesion count, sebum production (measured with the Sebutape® technique), and Global Acne Grading System (GAGS) scale...
March 25, 2017: Journal of Cosmetic Dermatology
https://www.readbyqxmd.com/read/28326562/liposome-encapsulated-hemoglobin-accelerates-skin-wound-healing-in-diabetic-db-db-mice
#11
Tsuyoshi Fukui, Akira T Kawaguchi, Susumu Takekoshi, Muneo Miyasaka, Hideaki Sumiyoshi, Rica Tanaka
Since liposome-encapsulated hemoglobin with high O2 affinity (h-LEH, P50 O2  = 10 mm Hg) has been reported to accelerate skin wound healing in normal mice, it was tested in dB/dB mice with retarded wound healing, as seen in human diabetics. Two full-thickness dorsal wounds 6 mm in diameter encompassed by silicone stents were created in dB/dB mice. Two days later (day 2), the animals were randomly assigned to receive intravenous h-LEH (2 mL/kg, n = 7) or saline (2 mL/kg, n = 7). The same treatment was repeated 4 days after wounding (day 4), and the size of the skin lesions was analyzed by photography, surface perfusion was detected by Laser-Doppler imager, and plasma cytokines and chemokines were determined on days 0, 2, 4, and 7, when all animals were euthanized for morphological studies...
March 21, 2017: Artificial Organs
https://www.readbyqxmd.com/read/28321359/high-throughput-screening-of-potential-skin-penetration-enhancers-using-stratum-corneum-lipid-liposomes-preliminary-evaluation-for-different-concentrations-of-ethanol
#12
Pajaree Sakdiset, Yuki Kitao, Hiroaki Todo, Kenji Sugibayashi
In this study, we developed a technique for high-throughput screening (HTS) of skin penetration-enhancers using stratum corneum lipid liposomes (SCLLs). A fluorescent marker, sodium fluorescein (FL), entrapped in SCLLs was prepared to provide a preliminary evaluation of the effect of different concentrations of ethanol on the disruption effect of SCLLs, which is an alternative for skin penetration-enhancing effects. In addition, SCLLs containing a fluorescent probe (DPH, TMA-DPH, or ANS) were also prepared and utilized to investigate SCLL fluidity...
2017: Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28293107/nh4hco3-gas-generating-liposomal-nanoparticle-for-photoacoustic-imaging-in-breast-cancer
#13
Jizhu Xia, Gang Feng, Xiaorong Xia, Lan Hao, Zhigang Wang
In this study, we have developed a biodegradable nanomaterial for photoacoustic imaging (PAI). Its biodegradation products can be fully eliminated from a living organism. It is a gas-generating nanoparticle of liposome-encapsulating ammonium bicarbonate (NH4HCO3) solution, which is safe, effective, inexpensive, and free of side effects. When lasers irradiate these nanoparticles, NH4HCO3 decomposes to produce CO2, which can absorb much of the light energy under laser irradiation with a specific wavelength, and then expand under heat to generate a thermal acoustic wave...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28292574/effect-of-lipid-based-dry-eye-supplements-on-the-tear-film-in-wearers-of-eye-cosmetics
#14
Michael T M Wang, Irene Sung Hee Cho, Soo Hee Jung, Jennifer P Craig
PURPOSE: To compare the effects on tear film parameters and contamination in cosmetic eyeliner wearers, after single application of two lipid-based dry eye treatments: a lipid-containing lubricant eye drop and a phospholipid liposomal spray. METHODS: Fifty participants were enrolled in a prospective, randomised, paired-eye, investigator-masked trial. Pencil eyeliner (Body Shop(®) Crayon Eye Definer) was applied to the upper eyelid periocular skin of both eyes, anterior to the lash line...
March 11, 2017: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
https://www.readbyqxmd.com/read/28283014/-fungemia-and-septic-arthritis-caused-by-saprochaete-capitata-in-a-patient-with-fanconi-aplastic-anemia-a-case-report
#15
Ömür Mustafa Parkan, Mustafa Altay Atalay, Ayşe Nedret Koç, Çiğdem Pala, Gonca Aydemir, Leylagül Kaynar
Saprochaete capitata (formerly known as Blastoschizomyces capitatus, Trichosporon capitatum, Geotrichum capitatum) is a rare but emerging yeast-like fungus. It is commonly found in environmental sources and can be isolated from skin, gastrointestinal system and respiratory tract of healthy individuals as well. It mainly infects patients with hematological malignancies such as acute myeloid leukemia (AML), especially in the presence of neutropenia; and mortality rates are high in those patients. Although the data about the in vitro antifungal susceptibility are limited, it is being reported that amphotericin B and voriconazole are more effective on S...
January 2017: Mikrobiyoloji Bülteni
https://www.readbyqxmd.com/read/28279918/near-infrared-light-activation-of-quenched-liposomal-ce6-for-synergistic-cancer-phototherapy-with-effective-skin-protection
#16
Liangzhu Feng, Danlei Tao, Ziliang Dong, Qian Chen, Yu Chao, Zhuang Liu, Meiwan Chen
Current photodynamic therapy (PDT) is suffering from limited efficacy towards hypoxia tumors and severe post-treatment photo-toxicity such as light-induced skin damages. To make PDT more effective in cancer treatment while being patient-comfortable, herein, a hexylamine conjugated chlorin e6 (hCe6) as the photosensitizer together with a lipophilic near-infrared (NIR) dye 1,1'-dioctadecyl-3,3,3',3'-tetramethylindotricarbocyanine iodide (DiR) are co-encapsulated into polyethylene glycol (PEG) shelled liposomes...
November 21, 2016: Biomaterials
https://www.readbyqxmd.com/read/28277004/fractional-laser-assisted-percutaneous-drug-delivery-via-temperature-responsive-liposomes
#17
Takahiro Fujimoto, Masayuki Ito, Shinobu Ito, Hideko Kanazawa
Liposomes are used for transdermal delivery of drugs and vaccines. Our objective was to develop temperature-responsive (TR) liposomes to achieve temperature-dependent, controlled release of an encapsulated drug, and use fractional laser irradiation to enhance transdermal permeability of these liposomes. TR-liposomes prepared using a thermosensitive polymer derived from poly-N-isopropylacrylamide, N,N-dimethylacrylamide, egg phosphatidylcholine, and dioleoylphosphatidylethanolamine, delivered fluorescein isothiocyanate-conjugated ovalbumin (OVA-FITC) as a model drug...
May 2017: Journal of Biomaterials Science. Polymer Edition
https://www.readbyqxmd.com/read/28275534/disseminated-phaeohyphomycosis-in-a-dog
#18
Lana S Rothenburg, Timothy A Snider, Allison Wilson, Anthony W Confer, Akhilesh Ramachandran, Rinosh Mani, Theresa Rizzi, Laura Nafe
Phaeohyphomycosis is a rare but emerging disease caused by dematiaceous fungi. Here we describe the case of an immunosuppressed dog with disseminated phaeohyphomycosis secondary to Bipolaris spicifera infection. Regionally extensive infiltration of the paw pads, skin, myocardium, liver, renal interstitium and diaphragm was identified on histopathology. Candida glabrata and Fusarium oxysporum were also cultured from multiple sites post-mortem. The dog was treated with fluconazole, itraconazole, terbinafine and liposomal amphotericin B, but was euthanized due to its poor prognosis after 12 days of therapy...
March 2017: Medical Mycology Case Reports
https://www.readbyqxmd.com/read/28272505/enhanced-cellular-uptake-of-size-separated-lipophilic-silicon-nanoparticles
#19
Aubrey E Kusi-Appiah, Melanie L Mastronardi, Chenxi Qian, Kenneth K Chen, Lida Ghazanfari, Plengchart Prommapan, Christian Kübel, Geoffrey A Ozin, Steven Lenhert
Specific size, shape and surface chemistry influence the biological activity of nanoparticles. In the case of lipophilic nanoparticles, which are widely used in consumer products, there is evidence that particle size and formulation influences skin permeability and that lipophilic particles smaller than 6 nm can embed in lipid bilayers. Since most nanoparticle synthetic procedures result in mixtures of different particles, post-synthetic purification promises to provide insights into nanostructure-function relationships...
March 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28267210/skin-delivery-of-hydrophilic-molecules-from-liposomes-and-polysaccharide-coated-liposomes
#20
N Belhaj, E Arab-Tehrany, E Loing, C Bézivin
OBJECTIVES: Liposomes are commonly used in cosmetic formulations to increase the bioavailability of active ingredients. We have previously shown that polysaccharide coating of liposomes improves their resistance to surfactants and electrolytes. In the current study, we have assessed the impact of coating on the skin penetration enhancer properties of liposomes. METHODS: The physicochemical properties of coated liposomes (Ionosomes™) were evaluated before and after encapsulation of two different hydrophilic molecules (caffeine and a hexapeptide), and compared to those observed with non-coated liposomes...
March 7, 2017: International Journal of Cosmetic Science
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