Tailoring Novel Soft Nano-vesicles ‘Flexosomes’ for Enhanced Transdermal Drug Delivery: Optimization, characterization and comprehensive ex vivo - in vivo evaluation

Publication date: Available online 10 February 2019Source: International Journal of PharmaceuticsAuthor(s): Hanaa A. Abdel-Messih, Rania A.H. Ishak, Ahmed S. Geneidi, Samar MansourAbstractThe transdermal route is a convenient non-invasive way for drug delivery, however, the hydrophobic compact nature of stratum corneum (SC) forms an obstacle hindering the diffusion of drugs particularly hydrophilic ones. Hence, the purpose of this study was to develop novel soft nano-vesicles, entitled Flexosomes, amalgamating two penetration enhancers, ethanol and one edge activator (EA) from various types and different hydrophilic-lipophilic balances. The tailored vesicles were loaded with tropisetron hydrochloride (TRO), a potent highly-soluble anti-emetic, and compared with ethosomes. Aiming to preclude the formation of rigid non-deformable mixed micelles, all critical parameters; EA type, phosphatidylcholine-to-EA molar ratio, and cholesterol concentration, were optimized proving their influences on vesicle-to-micelle transitions. The prepared formulations were characterized in terms of visual inspection, particle size, polydispersity, zeta potential, turbidity measurements, entrapment efficiency, and vesicle morphology. The permeation mechanisms were assessed by differential scanning calorimetry on isolated SC. The modified vesicles, based on ethanol and either vitamin E or PEGylated castor oil derivatives exhibited the highest transdermal fluxes confirmed by a deeply tracking to dermis...
Source: International Journal of Pharmaceutics - Category: Drugs & Pharmacology Source Type: research

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Fight Aging! publishes news and commentary relevant to the goal of ending all age-related disease, to be achieved by bringing the mechanisms of aging under the control of modern medicine. This weekly newsletter is sent to thousands of interested subscribers. To subscribe or unsubscribe from the newsletter, please visit: https://www.fightaging.org/newsletter/ Longevity Industry Consulting Services Reason, the founder of Fight Aging! and Repair Biotechnologies, offers strategic consulting services to investors, entrepreneurs, and others interested in the longevity industry and its complexities. To find out m...
Source: Fight Aging! - Category: Research Authors: Tags: Newsletters Source Type: blogs
This study clearly goes against what has been the common wisdom for the last 30, 40 years” and may lead to less testing and invasive treatment for such patients in the future, said Dr. Glenn Levine, a Baylor College of Medicine cardiologist with no role in the research. Some doctors still may quibble with the study, but it was very well done “and I think the results are extremely believable,” he said. About 17 million Americans have clogged arteries that crimp the heart’s blood supply, which can cause periodic chest pain. Cheap and generic aspirin, cholesterol-lowering drugs and blood pressure medic...
Source: TIME: Health - Category: Consumer Health News Authors: Tags: Uncategorized onetime Research Source Type: news
This study shows simultaneous incorporation of two hydrophobic molecules and a hydrophilic molecule into distearoylphosphatidylcholine (DSPC) liposomes. Pinocembrin and cholesterol are incorporated in the lipidic membrane while resazurin is encapsulated in the aqueous center. The thermotropic behavior of liposomes as a function of the additives was studied with differential scanning calorimetry and the morphology was observed by SEM. A high percentage of entrapment was found for different concentrations of pinocembrin. Cholesterol does not interfere with the incorporation efficiency of pinocembrin and improves the distribu...
Source: Thermochimica Acta - Category: Chemistry Source Type: research
Publication date: Available online 30 October 2019Source: Journal of Vascular and Interventional RadiologyAuthor(s): Timothy C. Huber, Nicole Keefe, James Patrie, Margaret C. Tracci, Daniel Sheeran, John F. Angle, Luke R. WilkinsAbstractPurposeTo evaluate psoas muscle area (PMA) as a predictor of all-cause mortality after endovascular aneurysm repair (EVAR) and compare it with other predictor variables.Material and MethodsRetrospective review of 407 patients who underwent EVAR over a 7-year period was performed. Demographics, comorbidity variables, and outcomes were collected. Preprocedure computed tomography scans were us...
Source: Journal of Vascular and Interventional Radiology - Category: Radiology Source Type: research
In this study, we attempted to observe the detailed three-dimensional structure of paramylon by focused ion beam/scanning electron microscopy (FIB/SEM). Paramylon samples were fixed and three-dimensional image reconstruction and segmentation of the image stack were created using computer software (Amira v6.0.1, FEI). The results indicated that the inside of paramylon particles (diameter: 5μm, thickness: 3μm) was comprised of a dense structure with no evidence of the presence of large pores and gaps, although a small 100 nm crack was observed. The specific surface area of paramylon particles measured by the BET method...
Source: Chemical and Pharmaceutical Bulletin - Category: Drugs & Pharmacology Authors: Tags: Chem Pharm Bull (Tokyo) Source Type: research
It seems that the tipping point has been reached in the Alzheimer's research and development community, in the sense that it is becoming more widely accepted that new approaches are needed. The failure to produce significant benefits to patients via clearance of amyloid from the brain by immunotherapy has spurred a great deal of theorizing, and several new and promising lines of work. For example, working on restoring age-related declines in drainage of cerebrospinal fluid might remove all metabolic waste from the brain. Alternatively, a focus on neuroinflammation and the role of dysfunctional microglia is suggested, parti...
Source: Fight Aging! - Category: Research Authors: Tags: Daily News Source Type: blogs
(CNN) — Need an excellent reason to add a dog to your life? How about living longer? “Our analysis found having a dog is actually protective against dying of any cause,” said Mount Sinai endocrinologist Dr. Caroline Kramer, lead author of a new systematic review of nearly 70 years of global research published Tuesday in “Circulation,” a journal of the American Heart Association. The review of the health benefits of man’s best friend analyzed research involving nearly 4 million people in the United States, Canada, Scandinavia, New Zealand, Australia and the United Kingdom. “Dog owne...
Source: WBZ-TV - Breaking News, Weather and Sports for Boston, Worcester and New Hampshire - Category: Consumer Health News Authors: Tags: Featured Health News Offbeat Syndicated CBSN Boston CNN Dogs Source Type: news
Abstract Diabetic kidney disease (DKD) is one of the leading pathological causes of decreased renal function and progression to end-stage kidney failure. To explore and characterize age-related changes in DKD and associated glomerular damage, we used a rat model of type 2 diabetic nephropathy (T2DN) at 12 weeks and older than 48 weeks. Then we compared their disease progression with control non-diabetic Wistar and diabetic Goto-Kakizaki (GK) rats. During the early stages of DKD, T2DN and GK animals revealed significant increases in blood glucose and kidney-to-body weight ratio. Both diabetic groups had significant...
Source: American Journal of Physiology. Renal Physiology - Category: Physiology Authors: Tags: Am J Physiol Renal Physiol Source Type: research
CONCLUSIONS: 3DO body shape PCs predict body composition with good accuracy and precision comparable to existing methods. 3DO PCs improve prediction of serum lipid and diabetes markers, and functional strength measurements. The safety and accessibility of 3DO scanning make it appropriate for monitoring individual body composition, and metabolic health and functional strength in epidemiological settings.This trial was registered at clinicaltrials.gov as NCT03637855. PMID: 31553429 [PubMed - as supplied by publisher]
Source: The American Journal of Clinical Nutrition - Category: Nutrition Authors: Tags: Am J Clin Nutr Source Type: research
ConclusionThese results illustrate areas in which we can improve education post-stroke, including ensuring patients receive individualised information about the aetiology of their stroke, risk factors and the importance of new medications. It also highlights the importance of ensuring advice regarding driving is clearly explained and documented.
Source: Age and Ageing - Category: Geriatrics Source Type: research
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