227 results match your criteria epithelium entrapment


Evaluation and Comparison of Solid Lipid Nanoparticles (SLNs) and Nanostructured Lipid Carriers (NLCs) as Vectors to Develop Hydrochlorothiazide Effective and Safe Pediatric Oral Liquid Formulations.

Pharmaceutics 2021 Mar 24;13(4). Epub 2021 Mar 24.

Department of Chemistry, University of Florence, via Schiff 6, Sesto Fiorentino, 50019 Florence, Italy.

The aim of this study was the optimization of solid lipid nanoparticles (SLN) and nanostructured lipid carriers (NLC) in terms of physicochemical and biopharmaceutical properties, to develop effective and stable aqueous liquid formulations of hydrochlorothiazide, suitable for paediatric therapy, overcoming its low-solubility and poor-stability problems. Based on solubility studies, Precirol ATO5 and Transcutol HP were used as solid and liquid lipids, respectively. The effect of different surfactants, also in different combinations and at different amounts, on particle size, homogeneity and surface-charge of nanoparticles was carefully investigated. Read More

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Keratitis, Pathology, Diagnosis and Treatment.

Pathogens 2021 Mar 10;10(3). Epub 2021 Mar 10.

Department of Ophthalmology, Saint Louis University, Saint Louis, MO 63104, USA.

keratitis is an unusual corneal infection that is recently increasing in frequency and is often contracted by contact lens wearers, someone who experienced recent eye trauma, or someone exposed to contaminated waters. survive in air, soil, dust, and water. Therefore, eye trauma and poor contact lens hygiene practices lead to the entrapment of debris and thus infection. Read More

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Microtia and cholesteatoma: Implications for the reconstructive surgeon.

JPRAS Open 2021 06 9;28:37-42. Epub 2021 Feb 9.

Department of Plastic Reconstructive and Hand Surgery, Amsterdam UMC, Emma Children’s Hospital, Location AMC, University of Amsterdam, Room G4.225, Meibergdreef 9, 1105 AZ Amsterdam, the Netherlands.

Infection after reconstructive surgery for microtia is a technical challenge. This can be a sign of cholesteatoma formation by entrapment of epithelium in the middle or outer ear, specifically when the patient does not respond to first choice antibiotic therapy and debridement. Two patients with microtia presented themselves with severe infections after ear reconstruction. Read More

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Mucociliary Respiratory Epithelium Integrity in Molecular Defense and Susceptibility to Pulmonary Viral Infections.

Biology (Basel) 2021 Jan 29;10(2). Epub 2021 Jan 29.

Laboratory of Optobiology, School of Biotechnology, Jawaharlal Nehru University, New Delhi 110067, India.

Mucociliary defense, mediated by the ciliated and goblet cells, is fundamental to respiratory fitness. The concerted action of ciliary movement on the respiratory epithelial surface and the pathogen entrapment function of mucus help to maintain healthy airways. Consequently, genetic or acquired defects in lung defense elicit respiratory diseases and secondary microbial infections that inflict damage on pulmonary function and may even be fatal. Read More

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January 2021

Development of an M cell targeted nanocomposite system for effective oral protein delivery: preparation, in vitro and in vivo characterization.

J Nanobiotechnology 2021 Jan 9;19(1):15. Epub 2021 Jan 9.

BK21 FOUR Team, College of Pharmacy, Dongguk University-Seoul, Dongguk-ro-32, Ilsan-Donggu, Goyang, Korea.

Background: There is a strong need for non-invasive and patient-friendly delivery systems of protein drugs for long-term therapy. However, oral delivery of protein drugs is a big challenge due to many barriers including instability in the gastrointestinal (GI) tract and low permeability. To overcome the absorption barriers in GI tract and improve the patient compliance, this study aimed to develop an M cell targeted-nanocomposite delivery system of protein drugs. Read More

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January 2021

Drug-Loaded Lipid-Core Micelles in Mucoadhesive Films as a Novel Dosage Form for Buccal Administration of Poorly Water-Soluble and Biological Drugs.

Pharmaceutics 2020 Nov 30;12(12). Epub 2020 Nov 30.

Department of Pharmaceutical Science and Technology, School of Chemical and Pharmaceutical Sciences, University of Chile, Santiago 8380494, Chile.

The aim of the study was to develop a novel buccal dosage form to transport rhodamine 123 and human insulin as models for poorly water-soluble and biological drugs, using lipid-core micelles (LCMs)-loaded mucoadhesive films. LCMs were synthesized by a low-energy hot emulsification process, yielding spherically shaped, small-sized, monodispersed and negatively charged carriers with high entrapment efficiency. In vitro release studies demonstrated a higher release of insulin rather than rhodamine from LCMs in simulated physiological conditions, due to an initial burst release effect; however, both release profiles are mainly explained by a diffusion mechanism. Read More

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November 2020

Self-Assembling Tacrolimus Nanomicelles for Retinal Drug Delivery.

Pharmaceutics 2020 Nov 10;12(11). Epub 2020 Nov 10.

Division of Pharmaceutical Sciences, School of Pharmacy, University of Missouri-Kansas City, 2464 Charlotte Street, Kansas City, MO 64108, USA.

Neovascular age-related macular degeneration (AMD) is characterized by an increase in reactive oxygen species (ROS) and pro-inflammatory cytokines in the retinal pigment epithelium cells. The primary purpose of this study was the development of a clear, tacrolimus nanomicellar formulation (TAC-NMF) for AMD. The optimized formulation had a mean diameter of 15. Read More

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November 2020

Maxillary surgical ciliated cysts following advancement Le Fort I osteotomy with concomitant autogenous bone grafting: a simple coincidence or a cause-effect relationship?

J Stomatol Oral Maxillofac Surg 2020 Oct 20. Epub 2020 Oct 20.

Unit of Oral Medicine and Oral and Maxillofacial Pathology, Division of Oral and Maxillofacial Surgery, Department of Surgery, University of Geneva & University Hospitals of Geneva, Geneva, Switzerland. Electronic address:

Surgical ciliated cysts (SCCs) are rare benign lesions that have been described after radical maxillary sinus surgery such as a Caldwell-Luc procedure for chronic sinusitis. They usually occur several years following surgery, and they typically present as an evolving swelling in the maxillary sulcus and cheek area. The pathogenetic mechanism is related to the entrapment of respiratory epithelium from the paranasal sinuses and/or the nose within the wound created by the surgical procedures. Read More

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October 2020

Swelling in the Floor of the Mouth: A Diagnostic Dilemma.

Ann Maxillofac Surg 2020 Jan-Jun;10(1):258-261. Epub 2020 Jun 8.

Department of Head and Neck Surgery, MMDU, Ambala, Haryana, India.

Epidermoid cysts are abnormal structures originating from abnormal ectoderm and are benign and slow growing. These are found anywhere in the body. They arise during embryonic fusion due to entrapment of epithelial remnants and sometimes due to faulty implantation of the epithelium. Read More

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Lutein-Loaded, Biotin-Decorated Polymeric Nanoparticles Enhance Lutein Uptake in Retinal Cells.

Pharmaceutics 2020 Aug 24;12(9). Epub 2020 Aug 24.

Department of Basic Pharmaceutical Sciences, Fred Wilson School of Pharmacy, High Point University, High Point, NC 27262, USA.

Age related macular degeneration (AMD) is one of the leading causes of visual loss and is responsible for approximately 9% of global blindness. It is a progressive eye disorder seen in elderly people (>65 years) mainly affecting the macula. Lutein, a carotenoid, is an antioxidant, and has shown neuroprotective properties in the retina. Read More

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Mucinous Adenomyomatous Pulmonary Hamartoma: Clinicopathologic, Immunohistochemical, and Molecular Features of 6 Cases.

Int J Surg Pathol 2021 May 27;29(3):273-280. Epub 2020 Jul 27.

Mayo Clinic Arizona, Scottsdale, AZ, USA.

Pulmonary hamartoma (PH) may show various combinations of mesenchymal tissues with entrapment of respiratory epithelium. An uncommon variant of PH prevalently consisting of smooth muscle with mucinous proliferation has been reported in literature under several definitions as sporadic reports. We collected a series of 6 leiomyomatous PH associated with mucinous growth from consultation files (3 cases) and multicentric revision of archival files among 128 consecutive surgically resected PH. Read More

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Ultra-small-size Astragaloside-IV loaded lipid nanocapsules eye drops for the effective management of dry age-related macular degeneration.

Expert Opin Drug Deliv 2020 09 30;17(9):1305-1320. Epub 2020 Jun 30.

Department of Pharmaceutics, School of Pharmacy, Shenyang Pharmaceutical University , Shenyang, Liaoning, PR China.

Background Age-related macular degeneration (AMD) is a major cause of severe visual loss in elderly people. The treatments for dry AMD (dAMD) are severely limited so far. In this work, we aim to develop an eye drop to protect retinal functions against oxidative stress and apoptosis for improving dAMD management. Read More

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September 2020

Hyaluronic Acid-Pluronic®F127-Laden Soft Contact Lenses for Corneal Epithelial Healing: In Vitro and In Vivo Studies.

AAPS PharmSciTech 2020 Jun 2;21(5):162. Epub 2020 Jun 2.

Refractive Surgery Center, The Second People's Hospital of Jinan, No. 148, Jingyi Road, Huaiyin District, Jinan, 250022, Shandong Province, China.

Hyaluronic acid (HA) is widely used to treat various ocular diseases like dry eye syndrome, keratoconus, and other corneal epithelial injuries. The currently available eye drop solutions need frequent doses affecting the routine life style of patients. In this work, the silicone contact lens was designed to entrap HA and Pluronic®F127 to improve the wettability of the contact lens to treat various ocular diseases. Read More

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Prominent entrapment of respiratory epithelium in primary and metastatic intrapulmonary non-epithelial neoplasms: a frequent morphological pattern closely mimicking adenofibroma and other biphasic pulmonary lesions.

Virchows Arch 2020 Aug 19;477(2):195-205. Epub 2020 Mar 19.

Institute of Pathology, Friedrich-Alexander University Erlangen-Nürnberg (FAU), University Hospital, Krankenhausstrasse 8-10, 91054, Erlangen, Germany.

As one of the most common target organs for hematogenous spread from diverse cancers, biopsy interpretation of lung tumors is complicated by the challenging question of primary versus metastatic and by frequent entrapment of native respiratory glands. Nevertheless, the literature dealing with this issue is surprisingly sparse and no single study has been devoted to this topic. We reviewed 47 surgical lung specimens of non-epithelial neoplasms (38 metastases, mainly from sarcomas and 9 primary lesions) for frequency and pattern of intralesional epithelial entrapment. Read More

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The cortical actin network regulates avidity-dependent binding of hyaluronan by the lymphatic vessel endothelial receptor LYVE-1.

J Biol Chem 2020 04 7;295(15):5036-5050. Epub 2020 Feb 7.

Medical Research Council Human Immunology Unit, University of Oxford, Oxford OX3 9DS, United Kingdom

Lymphatic vessel endothelial hyaluronan receptor 1 (LYVE-1) mediates the docking and entry of dendritic cells to lymphatic vessels through selective adhesion to its ligand hyaluronan in the leukocyte surface glycocalyx. To bind hyaluronan efficiently, LYVE-1 must undergo surface clustering, a process that is induced efficiently by the large cross-linked assemblages of glycosaminoglycan present within leukocyte pericellular matrices but is induced poorly by the shorter polymer alone. These properties suggested that LYVE-1 may have limited mobility in the endothelial plasma membrane, but no biophysical investigation of these parameters has been carried out to date. Read More

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Do hair follicles operate as primitive, multifocal kidney-like excretory (mini-) organs?

Exp Dermatol 2020 03;29(3):357-365

Dr. Phillip Frost Department of Dermatology & Cutaneous Surgery, University of Miami Miller School of Medicine, Miami, FL, USA.

Besides their many other functions, hair shafts (HS) also are a repository for potentially noxious compounds. These are neutralized by their deposition within terminally differentiated, avital epithelial cells (trichocytes) that also facilitate the interaction of potential toxins with melanin, a toxin-adsorbent biopolymer. Trichocytes are completely extruded via HS shedding during exogen, an actively controlled process. Read More

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Comparative evaluation of demineralized bone matrix and type II collagen membrane versus eggshell powder as a graft material and membrane in rat model.

Indian J Dent Res 2019 Nov-Dec;30(6):877-880

Department of Periodontics, Saveetha Dental College, Chennai, Tamil Nadu, India.

Introduction: The regeneration of supportive periodontal tissues after destructive periodontal disease has become one of the primary objectives of periodontal therapy. Demineralized bone matrix (Osseograft), when used, has shown osteoinductive potential and collagen membrane (GTR) prevents the migration of epithelium into it. The literature showed that eggshell which consists of hydroxyapatite and calcium carbonate shows osteoconductive as well as inductive properties. Read More

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January 2020

The Equine Gingiva: A Histological Evaluation.

Front Vet Sci 2019 13;6:435. Epub 2019 Dec 13.

Institute of Veterinary-Anatomy, Histology and Embryology, Faculty of Veterinary Medicine, Justus Liebig University Giessen, Giessen, Germany.

Equine periodontal disease in horses has long been recognized as a painful disease, leading to a poor condition. The disease is widespread and attracts growing attention in equine dental medicine. The understanding of the underlying etiological and pathological mechanisms of equine periodontal disease is necessary to develop effective prophylactic and treatment options. Read More

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December 2019

Silica-Coated Nanoparticles with a Core of Zinc, l-Arginine, and a Peptide Designed for Oral Delivery.

ACS Appl Mater Interfaces 2020 Jan 18;12(1):1257-1269. Epub 2019 Dec 18.

Sanofi Recherche & Développement , CMC External Innovation , 82, avenue Raspail , 94250 Gentilly Cedex , France.

Nanoparticle constructs for oral peptide delivery at a minimum must protect and present the peptide at the small intestinal epithelium in order to achieve oral bioavailability. In a reproducible, scalable, surfactant-free process, a core was formed with insulin in ratios with two established excipients and stabilizers, zinc chloride and l-arginine. Cross-linking was achieved with silica, which formed an outer shell. Read More

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January 2020

Mangiferin glycethosomes as a new potential adjuvant for the treatment of psoriasis.

Int J Pharm 2020 Jan 18;573:118844. Epub 2019 Nov 18.

Department of Pharmacy, Pharmaceutical Technology and Parasitology, Faculty of Pharmacy, University of Valencia, Av. Vicent Andrés Estellés s/n, 46100 Burjassot, Valencia, Spain; Instituto Interuniversitario de Investigación de Reconocimiento Molecular y Desarrollo Tecnológico (IDM), Universitat Politècnica de València, Universitat de València, Av. Vicent Andrés Estellés s/n, 46100 Burjassot, Valencia, Spain.

Mangiferin, a natural compound isolated from Mangifera indica L, was incorporated in glycerosomes, ethosomes and alternatively in glycerol-ethanol phospholipid vesicles (glycethosomes). Actually, only glycethosomes were able to stably incorporate the mangiferin that was loaded at increasing concentrations (2, 4, 6, 8 mg/mL). The morphology, size distribution, rheological properties, surface charge and entrapment efficiency of prepared vesicles were deeply measured. Read More

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January 2020

Optimization, stabilization, and characterization of amphotericin B loaded nanostructured lipid carriers for ocular drug delivery.

Int J Pharm 2019 Dec 26;572:118771. Epub 2019 Oct 26.

Department of Pharmaceutics and Drug Delivery, School of Pharmacy, University of Mississippi, Oxford, MS, USA; Research Institute of Pharmaceutical Sciences, University of Mississippi, University, MS, USA. Electronic address:

The current study sought to formulate, optimize, and stabilize amphotericin B (AmB) loaded PEGylated nanostructured lipid carriers (NLC) and to study its ocular biodistribution following topical instillation. AmB loaded PEGylated NLC (AmB-PEG-NLC) were fabricated by hot-melt emulsification followed by high-pressure homogenization (HPH) technique. 1,2-distearoyl-sn-glycero-3-phosphoethanolamine-N-[methoxy(polyethylene glycol)] (mPEG-2K-DSPE) was used for surface PEGylation. Read More

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December 2019

Malassezia colonisation on a reconstructed human epidermis: Imaging studies.

Mycoses 2019 Dec 21;62(12):1194-1201. Epub 2019 Oct 21.

Division of Microbiology, Department of Pathology, Faculty of Medicine, University of Porto, Porto, Portugal.

Background: Biofilm formation represents a major microbial virulence attribute especially at epithelial surfaces such as the skin. Malassezia biofilm formation at the skin surface has not yet been addressed.

Objective: The present study aimed to evaluate Malassezia colonisation pattern on a reconstructed human epidermis (RhE) by imaging techniques. Read More

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December 2019

Hydroxytyrosol encapsulated in biocompatible water-in-oil microemulsions: How the structure affects in vitro absorption.

Colloids Surf B Biointerfaces 2019 Dec 7;184:110482. Epub 2019 Sep 7.

Institute of Chemical Biology, National Hellenic Research Foundation, 48, Vassileos Constantinou Ave., 11635, Athens, Greece. Electronic address:

Over the last years, the incorporation of natural antioxidants in food and pharmaceutical formulations has gained attention, delaying or preventing oxidation phenomena in the final products. In order to take full advantage of their properties, protection in special microenvironments is of great importance. The unique features of the natural phenolic compound hydroxytyrosol (HT) - including antioxidant, anti-inflammatory, antiproliferative and cardioprotective properties - have been studied to clarify its mechanism of action. Read More

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December 2019

Using ordered mesoporous silica SBA-15 to limit cutaneous penetration and transdermal permeation of organic UV filters.

Int J Pharm 2019 Oct 19;570:118633. Epub 2019 Aug 19.

School of Pharmaceutical Sciences, University of Geneva & University of Lausanne, Switzerland. Electronic address:

Avobenzone (AVO), oxybenzone (OXY), and octyl methoxycinnamate (OMC), are widely used UV filters. The aim of this study was to investigate the effect of incorporation in mesoporous silica (SBA-15) on their cutaneous deposition and permeation. Stick formulations containing "free" and "incorporated" UV filters (SF1 and SF2, respectively) were prepared and characterized with respect to their physicochemical, thermal, and functional properties. Read More

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October 2019

Phospholipid-polymer hybrid nanoparticle-mediated transfollicular delivery of quercetin: prospective implement for the treatment of androgenic alopecia.

Drug Dev Ind Pharm 2019 Oct 22;45(10):1654-1663. Epub 2019 Aug 22.

SLT Institute of Pharmaceutical Sciences, Guru Ghasidas Vishwavidyalaya , Bilaspur , India.

The aim of the study was to deliver effective doses of quercetin (Que) to the lower region of hair follicles (HFs) using the transfollicular route through dipalmotylphosphatidylcholine (DPPC)-reinforced poly lactide-co- glycolide nanoparticles (DPPC-PLGA hybrid NPs) for the treatment of alopecia. PLGA and DPPC-PLGA hybrid NPs were prepared by double-emulsification solvent evaporation method. NPs were characterized for size, shape, zeta potential entrapment and drug release. Read More

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October 2019

Polymer-based nanoparticles for chemo/gene-therapy: Evaluation its therapeutic efficacy and toxicity against colorectal carcinoma.

Biomed Pharmacother 2019 Oct 1;118:109257. Epub 2019 Aug 1.

Department of Pharmacy, Sichuan Cancer Hospital&Institute, Sichuan Cancer Center, School of Medicine, University of Electronic Science and Technology of China, Chengdu, China; Personalized Drug Therapy Key Laboratory of Sichuan Province, Chengdu, Sichuan, China. Electronic address:

Combination treatment through simultaneous delivery of anticancer drugs and gene with nano-formulation has been demonstrated to be an elegant and efficient approach for colorectal cancer therapy. Recently, sorafenib being studied in combination therapy in colorectal cancer (CRC) attracted attention of researchers. On the basis of our previous study, pigment epithelium-derived factor (PEDF) loaded nanoparticles showed good effect on CRC in vitro and in vivo. Read More

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October 2019

Axitinib-Loaded Poly(Lactic-Co-Glycolic Acid) Nanoparticles for Age-Related Macular Degeneration: Formulation Development and Characterization.

Assay Drug Dev Technol 2019 May/Jun;17(4):167-177

Department of Pharmaceutical Sciences, College of Pharmacy, University of South Florida, Tampa, Florida.

in vitro in vitro ± ± ± in vitro Read More

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Exploring optimized methoxy poly(ethylene glycol)-block-poly(ε-caprolactone) crystalline cored micelles in anti-glaucoma pharmacotherapy.

Int J Pharm 2019 Jul 6;566:573-584. Epub 2019 Jun 6.

Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Ain Shams University, Monazzamet Elwehda Elafrikeya Street, Abbaseyya, Cairo P.O.B. 11566, Egypt. Electronic address:

Methoxy-poly(ethylene glycol)-b-poly(ε-caprolactone) (mPEG-PCL) polymeric micelles (PMs) open a promising avenue through which ocular drug delivery with superior efficacy and tolerability can be potentially obtained. Methazolamide (MTZ) is an anti-glaucoma drug exhibiting poor corneal penetration, making it an ideal candidate for new polymeric micellar systems. MTZ-PMs were prepared using the thin film hydration procedure and optimized using a Design of Experiment (DoE) approach. Read More

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Diagnostic accuracy of intra-operative assessment of de-epithelisation of the malleus by the surgeon in type 1 tympanoplasty compared to histopathological examination.

Authors:
A P Azeez V Letha

J Laryngol Otol 2019 Jun 4;133(6):462-465. Epub 2019 Jun 4.

Department of Pathology,Government Medical College,Kottayam,India.

Objective: This study was undertaken to determine the accuracy of the surgeon's assessment in detecting epithelial remnants over the malleus after de-epithelisation in tympanoplasty.

Methods: Intra-operatively, the umbo was assessed for epithelial remnants with the microscope. The umbo was then resected and sent for histopathological examination to detect epithelial remnants. Read More

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